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190-833 Creating App.Components Using IBM Workplace Designer 2.5

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190-833 exam Dumps Source : Creating App.Components Using IBM Workplace Designer 2.5

Test Code : 190-833
Test Name : Creating App.Components Using IBM Workplace Designer 2.5
Vendor Name : Lotus
Q&A : 90 Real Questions

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Lotus Creating App.Components Using IBM

Lotus hits new excessive | killexams.com Real Questions and Pass4sure dumps

Lotus hits new high
  • by Jeff Symoens
  • might also 30, 1999
  • every of the ultimate few releases of Lotus construction Corp.'s Notes and Domino items have introduced pretty enormous advancements to the enterprise's groupware, collaboration and messaging platform. however the evolution of the feature set in unlock 5 (R5) product suite of Notes, Domino and Domino fashion designer eclipses that of prior releases and serves to punctuate the development that Lotus has made with the Notes/Domino platform in fresh years.

    ordinary, the benefits of R5 include a extra powerful and fuller-featured customer, a a great deal greater amazing utility development ambiance and a greater potent utility server, which provides potent administration capabilities and more suitable connectivity and integration to external statistics outlets.

    From a competitive standpoint, R5 makes huge strides in eliminating one of the crucial product suite's past weaknesses. particularly, the convenience-of-use and normal interface enhancements to the Notes client make it a good deal greater competitive than previous versions with Microsoft Corp.'s Outlook, the customer for its alternate Server.

    in the meantime, enhancements in Domino's building and server infrastructure beginning to make the platform a extra fascinating choice as a global large internet-based utility server. And enhancements to the platform's administration equipment now not simplest make the platform lots more straightforward for administrators to manage, but they also may still assist redefine users' expectations of how disbursed messaging and application server environments may still be managed.

    customer Evolution

    regular Notes conclusion clients will perceive the merits of R5 in two ways: in more suitable prevalent usability and more desirable elements within the new Notes client; and in additional characteristic-prosperous functions that developers will be in a position to provide because of enhancements in Domino equipment.

    The widespread Notes customer has been absolutely overhauled in R5 to provide a plenty more net-like journey for Notes clients. Lotus also has separated the three aspects of the Notes client—conclusion-person functions, design and Domino administration—into distinct accessories. each component nevertheless makes use of the equal typical code base, however directors now can discriminate with ease which components get put in on every person's machine.

    From the start, Notes R5 introduces the normal Notes consumer to a completely new adventure. R5's new Welcome page provides a graphical web-like front end that allows for users to right now entry regular projects, such as developing new email messages or calendar entries, or to conveniently open their electronic mail inbox or calendar for entry to a full latitude of tasks.

    Lotus gives 4 predefined Welcome pages from which to choose. i used to be able to customise the look of each and every page and add customized pages relatively without problems. Notes vigor clients can use Domino fashion designer for greater superior customization. youngsters, I felt Lotus might have enabled a bit greater advanced tailoring capabilities from the widespread Notes interface.

    in addition to the Welcome page, the prevalent customer interface has passed through a lot of alterations. Lotus has included using bookmarks and subscriptions into the Notes interface. Bookmarks allow quick access to specific Notes databases, documents or web pages on the internet, while subscriptions video display selected Notes databases for brand new pastime and publish a listing of recent gadgets posted to these databases.

    the new Notes client additionally advantages from a couple of enhancements to core Notes databases, such because the user mail and personal handle book databases. These enhancements go an extended means toward making the commonplace Notes person experience a greater pleasing one.

    software Design

    while most americans likely do not feel of Domino dressmaker very regularly once they feel about the Notes/Domino platform, this element is critical. in case you wish to use the platform to installation rich workgroup applications, all of it starts with Domino dressmaker as a result of its facets examine, to a huge extent, the sorts of functions that you may create for the platform.

    compared with prior versions of the product, Domino clothier R5 is nothing in need of spectacular. R5 introduces essentially the most effective design customer of any outdated Notes/Domino unlock. In particular, the elements during this edition delivery to make Domino and the web seem like a natural companionship instead of a compelled one.

    using Domino clothier, i used to be in a position to quickly create fundamental Notes functions. amongst Domino dressmaker's new facets, i used to be able to create framesets, which make it feasible to latest dissimilar Hypertext Markup Language pages as a single cohesive web page, which worked neatly in Notes and a browser; pages, which now permit for static documents in Domino databases; and outlines, which give reusable, hierarchical navigation points for use in kinds or views.

    For customary form and examine authoring, Domino dressmaker contains numerous small enhancements—equivalent to aligning selected motion buttons to the right or the left, or setting the heritage colour of a view—a good way to provide developers extra creative control over the seem to be and consider of their applications. a different function that i used to be happy to look carried out is Shared movements, which allowed me to reuse a single action button in quite a lot of kinds and views right through the database.

    the new unencumber additionally provides the capacity to make the most of JavaScript as an embedded scripting language within types. keep in mind, though, that the JavaScript

    implementation does not definitely substitute Lotus' personal LotusScript since it doesn't tie the JavaScript language to a Domino-specific object model. As such, the alternative to make use of JavaScript best appears on central design facets inside a kind.

    Domino designer also allows for builders to make use of Java applets within the database as normal design points to be used in conventional Notes kinds or pages.

    Lotus also has ported some of the Notes customer interface facets to Java. through the typical design residences dialog bins, i was able to set points, reminiscent of Notes view, to render as Java applets (as antagonistic to HTML) when considered through a browser. that incorporates a cost in terms of down load time and popular interactivity. In general, this performance concern is to be expected, however Lotus still may still work on getting the efficiency of these add-ons as much as pace.


    Apple and the Bot battle on Apps | killexams.com Real Questions and Pass4sure dumps

     

    Editorial

    a brand new media narrative is unfolding, replete with records all in search of to supply facts that Apple's success with native apps is over. there's no clear contract on what exactly will take over--Chat Bots, Voice Assistants, the net, Augmented fact or some new and unknown successor--however it is obvious that the loser have to be Apple. It has to be, since it's desperately essential by way of Apple's opponents. No Mr. App, I are expecting you to die!

    final month, Peter Kafka gravely warned by the use of Recode that "the app growth is over." The main records aspect surfaced by way of Kafka changed into that clients--watch for it--are not still downloading apps they already had closing yr, such as the extensively deployed fb and Messenger (below).

    Kafka painted out an image of slowing app downloads (at the least in the U.S.) and followed in conclusion that "that you would be able to nonetheless damage during the saturated app market, when you are very very very lucky, and good. but the odds are stacked against you."

    Of direction, this is the case in virtually each company. greater peculiarly, or not it's definitely the case on the web, the place content suppliers are struggling in an rising new era of ad-blockers. and unlike Apple's iOS Apps, internet apps have never in reality been very profitable for builders outside of a extremely few success experiences (corresponding to fb, which is now gaining far more success as a cellular app).

    however let's ignore that reality and fixate on how elaborate it's to earn big funds by means of speculatively inventing new App save titles. it is what Casey Newton wrote this spring for The Verge, in a profile of Pixite (a cash-strapped, small--but award successful--developer of photo modifying apps) ominously headlined "lifestyles and loss of life in the App shop," and that includes images of a cranium and a dreary income chart plunging into crimson.

    "last 12 months downloads flattened," Newton wrote, "and Pixite's revenues plunged by way of a third, to $629,000. abruptly, a company that obligatory to herald $2,000 a day to smash even found itself making $1,000 or much less. Pixite has no reserves of assignment capital to fall back on; other than a $50,000 seed funding from a Carnegie Mellon fund for alumni entrepreneurs, Pixite has funded itself."

    Enter the hopeless, demoralizing graveyard... if you dare!

    a couple weeks ago, Alex Austin wrote "The Apple App store graveyard" for Tech Crunch, which concentrated on complications related to app discoverability. well-nigh: there are such a lot of apps accessible that or not it's problematic for any new ones to face out and get observed (and downloaded). sort of like net pages. Or sweet bars. Or new automobiles. Or anything else that requires promoting.

    "people simply don't appear to have the equal exhilaration currently about Apple's App shop or the Google Play platform. The air of hopelessness that surrounds the cell app ecosystem is evident and demoralizing," he wrote, with first hand experience as a developer.

    note that the headline portrayed the difficulty as exciting to the App shop, no longer a problem for all cell app structures, or even all application, or even all items sold in any market. final analysis: if you create a product, you need to actively promote it or retain constructing it or it dies on the vine. Shocker!

    returned in 2014, Dan Frommer wrote for Quartz an article that helped kickstart the App keep death Knell, sensationally titled "Most smartphone clients download zero apps per 30 days," with the subhead "can't give 'em away."

    Curiously, that become posted all the way through the time that the aforementioned small developer group at Pixite said having over three million downloads yearly--and it turned into no longer "giving them away"--these app downloads had been bringing in nearly $1 million in annual revenues for the company.

    Frommer's headline turned into extracted from information compiled by comScore, which in fact pointed out that whereas most (65.5 %) of U.S. smartphone clients mentioned downloading "zero apps" in a standard month, round a quarter have been always downloading 1-3 new apps every month and another very nearly ten p.c had been downloading 4 or greater new apps every month. There is no ordinary consumer. Some buy a whole lot, some buy nothing. just ask Google about Android and iOS.

    The story of my loss of life has been greatly exaggerated

    That Quartz headline remains continually referred to as evidence that 'no person is downloading apps anymore,' despite the fact that Apple's App store downloads have grown dramatically over the last year and a half because the story became first posted.

    For fiscal 2015 (which ended about a yr after Frommer's article), Apple stated that its services company phase (dominated with the aid of App keep sales) grew by 10 % to become a $20 billion annual enterprise--the business's third fastest becoming business segment that yr after iPhones and "other items" together with the new Apple Watch and Apple television.

    all the way through Apple's most lately suggested "very unhealthy / second most useful quarter in heritage" ending in March, "functions" grew by way of 20 %, making it now a nearly $6 billion company per quarter. That capabilities boom turned into exceptionally distinct in Apple's 10Q as being "due primarily to greater App shop, licensing and AppleCare earnings."

    study one of the vital biggest sensations to hit cellular tech recently: Pokemon Go. it be an app. And it be awesome at exploiting what apps are superior at: providing new functionality and making use of novel applied sciences--like Augmented fact--so as to add value to present hardware gadgets.

    speculation developed atop statistical fallacy

    in no way mind that the App save is by hook or by crook producing billions of greenbacks for Apple--and increasing much more billions for iOS builders jointly. Now that we've a factoid suggesting that apps are dead, we can invent a successor!

    How about messaging bots? closing September, TechCrunch published "forget Apps, Now The Bots Take Over," an editorial via Beerud Sheth. Of route, if you're the manager govt of a messaging carrier, every opportunity to pound a nail can be the purpose you swing anything you need to call your hammer.

    "as the variety of cellular apps raises while the dimension of our cell screens decreases, we're attaining the bounds of the mobile 'OS + apps' paradigm," Sheth, the co-founder and chief govt of Teamchat wrote. "or not it's getting tougher to down load, install, control and switch between so many apps on our cellular equipment. Most cell clients best use a handful of apps each day."

    under no circumstances mind that a handheld mobile gadget can actually best give a "handful of apps" by definition or that "apps" are not in fact even a tangible commodity that occupy a certain volume of house; let's instead take situation with the conception that its "getting harder" to down load, use and switch between apps.

    that's clearly no longer true at all. every new edition of iOS has made downloading and switching between apps more convenient, if for no other rationale than the very cynical conception that Apple needs clients to preserve inflating its functions earnings by purchasing and downloading more apps. It even shamelessly advertises how excellent apps are.

    You may name it a capitalist motivation, type of like a messaging government writing about the critical significance of messaging bots. The article did make a contribution an enchanting graphic although (below), depicting the OS (apparently iOS) as a platform shrinking in relevance while third celebration messaging structures turn into the new thing on proper of it.

    The image reminds me of how 1996's Netscape's web browser grew to be more vital than Win32, at the least until Microsoft introduced information superhighway Explorer and tied the net to Win32, reverting things to the aspect where web apps had been conveniently home windows apps.

    The critical allure of messaging apps

    It is right that messaging is a primary use of cell contraptions today. some of the most widespread and a hit apps are in fact linked one way or the other to messaging. there's fb and its Messenger; the WhatsApp title fb paid billions to purchase; Microsoft's Skype and its newly received LinkedIn; Google's numerous chat purchasers; Twitter; WeChat and different messaging systems that are tremendously ordinary in China, and of course Apple's developed-in iMessages that most top class smartphone users have installed on their mobile through default.

    Why are fb, Google, Microsoft, Twitter, all of their chinese analogs--and this TechCrunch writer/Teamchat government himself--all concentrated on messaging as a platform? because it's the best shot they all have at replicating some fragment of success of the native iOS App keep.

    facebook spectacularly failed in repeated attempts to take over Android with initiatives like the facebook mobile and Android home. Google's Android is contributing very little from exact app sales; mobile remains a small fraction of the enterprise's revenues, despite its stewardship of the largest mobile platform via units. Microsoft has been completely shut out of the cell platform online game over its decade of attempts to woo clients with windows cellular, home windows cell, and now home windows 10 cell.

    chinese chat clients are working to construct structures on exact of Android, because they have got so little potential to control the commodity Android platform itself. These efforts were understanding to a degree, however none have developed into a +$20 billion a 12 months business like the iOS App keep.

    competitors by way of commodity: making rivals' products compete with low cost or free

    The optimum strategy to threaten your competitors' success is to take something they make their money on and suggest that it be nugatory through turning it right into a commodity. Microsoft did that to the Macintosh by making workstation hardware a cheap commodity paired with its personal 'very constructive' utility; Apple retaliated by means of refocusing on its top rate hardware and giving away its utility as a 'commodity OS' for Mac hardware.

    Google adopted Microsoft's strategy with Android in making hardware a commodity, and Apple fired lower back with free iOS downloads together with "free" Maps, Siri search and productiveness apps. With iOS 10, Apple is refocusing the capabilities of messaging apps as being an additional new taste of the venerable iOS App

    nowadays, all and sundry outside of Apple is trying to make the cellular iOS platform a commodity whereas focusing consideration on their own sub-systems, prominently within the realm of messaging apps that may host app-like "bots" of their own.

    What's new is that with iOS 10, Apple is refocusing the advantage of messaging apps as being yet another new flavor of the venerable iOS App. The platform of distribution--and the App keep itself--continue to be practically free to clients. essentially all iOS 9 users may be in a position to upgrade to iOS 10 for free.

    Why Bot when you can App?

    The concept of a bot being a textual, conversational chat service, or however a voice-based mostly assistant service, or even an app-like characteristic built right into a messaging platform (standard in China, where apps like WhatsApp can ebook you a ride or promote you items) is not whatever thing Apple is ignoring.

    as the most commercially successful mobile app platform supplier, Apple has deep insight into how individuals are the usage of iOS, on a global degree. while every person else become working on speculative, skills messaging structures--or paying massive billions to purchase existing ones--Apple was working to strengthen iMessages as a comfortable messaging platform that bridges SMS telephony contraptions and IP-based mostly desktop Macs. It now has a billion users who see iMessages by means of default.

    thanks to the hijinks of the American FBI and the British Parliament, Apple's iMessages platform has been widely--regularly--marketed within the media as being a extremely relaxed, encrypted messaging platform. clients know after they get a eco-friendly bubble that they're talking with an Android user, and that person may not be capable of advantage from probably the most features--including encryption--of native iMessage clients on iOS or a Mac or Apple Watch.

    once they get a blue bubble, they know they're dealing with a different iPhone user, and that that person has entry to the same apps. that you would be able to share Apple song, Apple news and Keynote documents with them. Your conversation is encrypted. and you can ship them reside photographs or list a true time video with out questioning in the event that they'll be able to see it.

    That digital divide is ready to get plenty more obtrusive with iOS 10. iMessages is getting animated consequences, WeChat-like stickers, facebook-like responses (beneath), bot-like iMessage Apps and Apple Watch-derived Digital touch sketches. And none of it's going to work on Android.

    Apple will even have an iMessage App store appropriate within the app, growing a significant new possibility for any app developer who can target the brand new sub-platform on iOS that looks remarkably corresponding to the TechCrunch messaging bots photo noted above.

    What if the Bot that Apple's critics all hoped would crush Apple's App shop ended up being just a different iOS App?

    Messaging Apps for the enterprise

    while Apple's iOS 10 promotional photographs seem like they may be all geared toward pre-young adults--from a laughing Donald Duck decal to an "ice cream cone creation" conversation app to the lightly fictitious "UnicornChat" depicted within the enterprise's WWDC movies--one of the vital real ambitions of iOS 10's new iMessage Apps can be far more critical: the business.

    facebook, Microsoft, Google and everyone else in the messaging platform company would love to get their tentacles into company circles. youngsters, only Apple has actually based that its iMessages is a fully encrypted platform (for years), and that it has no true hobby in harvesting users' conversations to look for effective records it may promote or use for marketing functions.

    The digital Frontier basis, American Civil Liberties Union and security consultants have been vocally patting Apple on the returned for its privacy and security stance. business users pay attention to such particulars.

    The iMessage Apps that Apple outlined in iOS 10 seem to have enormous capabilities as a business platform. All sorts of latest iOS apps--whether public App store titles, really expert enterprise apps created by way of establishments like IBM, or in-condominium corporate apps--can make use of the iMessaging platform to supply cozy conversation-primarily based points. An app might enable personnel to collaboratively determine off a collection of approvals right within iMessage, or facilitate an advanced quote negotiation workflow with a client.

    It wasn't a secret that Instagram copied Twitter's Vine idea for video, or that Twitter's Periscope changed into copied by way of fb are living, or that Snapchat is trying to muscle into facebook's territory with recollections, so how is it truly tough to think about that the world's largest and most a success mobile app platform seller is literally sucking up all of the respectable concepts concerning messaging structures and making them native to iOS--and newly useable to the viewers that Apple has, but that the majority mobile systems lack--commercial enterprise users.

    Apps outside of Messaging

    beyond the chat-based mostly bots that Apple has domesticated with iMessage Apps, the company additionally unveiled a new App Extension mechanism for third party enlargement of the domains of performance purchasable to Siri. here's a parallel effort to additionally make voice-based mostly bots a native part of iOS.

    This equal Intents mechanism used through Siri is also riding new expansions of Maps Apps (below), and of new superior Notifications that latest both glanceable Widget banners and actionable responses that behave comparable to iMessage Apps.

    Apple has increased the iOS App past the common grid of app icons, devoid of diminishing the home web page within the technique. All of those are examples of recent alternatives for third birthday celebration builders on iOS. Apple's pastimes are carefully tied to these of its third party developers. backyard of Apple's ecosystem, that's not as clearly the case.

    outside of iOS, Apple has also brought efforts to make the app significant to television with Apple television, and--with watchOS three--to make Apple Watch a useful platform for third party apps, in place of generally an activity tracker, a notifications band and first party app accent to iPhones.

    it's going to be no shock why Apple is putting so much emphasis on apps. The advertising of apps is a major component of one of the company's fastest transforming into segments. And beyond Apple's App save revenues, the use and popularity of native iOS, tvOS, watchOS and macOS apps expands ecosystem hobby in Apple core earnings middle: selling hardware.

    Apple's interests are carefully tied to those of its third birthday party builders. outdoor of Apple's ecosystem, it's not as naturally the case.

    Google would not truly get apps

    On Android, Google makes its funds from advertising, that may aid to monetize apps. but the ad enterprise would not depend on apps. really, Google nevertheless makes extra money from web-based mostly search adverts. moreover, probably the most business's basic improvements at this year's IO become speedy Apps, almost an effort to replace downloadable apps with streamed app add-ons.

    That solves a problem for Google but deemphasizes the price of apps on Android to serve as seen brands. Like most of what Google does, rapid Apps serve the wants of Google, not of Android hardware patrons and even third party developers (none of which have ever in reality requested for a way for users to make use of their apps with out downloading them).

    Early on, Google hoped that mobile internet apps would be respectable ample on Android, then delivered ChromeOS as a new netbook platform that became based mostly utterly on net functions rather than native, native apps. ChromeOS "apps" are comfortably net pages. Even most Android apps are pretty much Java applets rather than being native code utility.

    In a global dominated with the aid of native apps, Google's core competency in search and paid placement fades in relevance. Google is aware of that since it sees this every day in the cell market. Google's contempt for apps shows up in every Android monitor shot where third birthday celebration apps play second fiddle to the Google search bar, widgets and different chrome.

    Microsoft in reality would not definitely get apps

    Counterintuitively--regardless of large adventure as an immense application developer--Microsoft seems even more clueless about cell apps than even Google. Its first effort at a mobile platform tried to shoehorn the home windows pc computing device into a smaller reveal, however after being trounced by means of iPhone, Microsoft finally fired again with windows mobile, the use of advertising that promoted a streamlined journey the place you did not actually need apps and weren't tied to your cell with the aid of the incessant distraction of apps.

    Apps are unhealthy, m'kay?

    while it tried to painting the normal appeal and allure of iOS apps as a being a modern day "Reefer insanity," it also created a novel interpretation of apps for Zune / Metro / windows telephone that replaced the app icon with "reside Tiles," an animated block that served up are living statistics, a sort of animated widget.

    whereas Microsoft's enthusiasts crowed about how genius it turned into to exchange icons with live Tile animations, for app developers it meant whatever else. in its place of getting a prominently positioned iconic advert for his or her software on clients' home screens, begging to be used, they now got their product hidden in the back of some flashy animated visualization.

    imagine if Microsoft constructed a clone of the Mall of the us, however then required all of its future tenants to change their ordinary company branding with flashy HDTVs that depicted normally animated visualizations of records regarding their store. as an alternative of the use of colorations that mirror their own company, they'd additionally deserve to use Microsoft's colorings involving home windows. how many corporations would movement in?

    Such a spot may well be portrayed in futuristic science fiction. however the reality is that agents, just like app builders, want clients to look their personal company branding. in contrast to windows telephone, iOS items apps with a recognizable, effectively targetable icon representing the developers' product.

    Microsoft thought third birthday celebration apps had been there to promote its platform, not the other way around.

    Why Apple really gets apps

    Apple receives apps as a result of Apple invented the software. Apple failed to really invent the mobile app; before iPhones and even iPod video games there have been a whole lot of cellular structures pioneering a lot of elements of the modern app: Nokia did early work on securely signed code; Palm and danger helped popularize the idea of a marketplace for apps. Of path, ten years just before the first smartphones, Apple's early Newton MessagePad mainstreamed the thought of a house monitor grid of app icons.

    however before all that, again in the early Nineteen Eighties, Apple looked on the latest state of utility courses and invented new concepts and terminology to make computing simpler to use. In created commonplace conventions for equipment-vast copy and paste, printing and working with info; previous to that, each notebook program had its personal entertaining tips on how to open a file and hand rolled its personal aid for printing.

    but past standardizing the conventions of the laptop, Apple additionally created Human Interface guidelines that brought new, extra person-attainable terminology. rather than relating to utility code applications as "executables" (nonetheless enshrined in home windows' use of .exe) or even "classes," Apple coined the time period "application," as in some thing you would use to observe adjustments to a file (which Apple renamed "doc") before saving it to a subdirectory (which Apple rechristened as "folder"). notebook users in reality resisted using these new terms and conventions, before home windows copied every little thing and offered it as Microsoft's personal work.

    Apple clued into the value of "killer-apps" and their potential to promote hardware early on (as depicted in the internally commissioned "utility Sells programs" poster below). Apple II unit sales exploded after a 3rd birthday party developer invented the idea of the spreadsheet with VisiCalc. Mac revenue began to take off after Adobe and others built the tools that enabled computing device Publishing. Microsoft assembled a portfolio of Mac apps it called office, stoking further demand for graphical computing.

    Apple's decline all the way through the Nineties turned into no longer as a result of its failure to build compelling hardware as lots because it changed into its lack of ability to entice builders constructing compelling apps for its systems (both Macs and Newton drugs). The company's large turnaround came when Steve Jobs concentrated on increasing software aid: first from Microsoft's office in 1997, then across a growing base of the business's personal first birthday celebration apps starting from iTunes to Keynote to closing reduce pro.

    In 2006, Apple delivered iPod video games that may well be bought and distributed by means of iTunes just like tune or motion pictures. When it delivered iPhone, third birthday party builders had been upset that it didn't ship with a utility building equipment for constructing native apps. under a yr later, it bought one. These new iOS apps instantly outpaced all the different media being bought via iTunes.

    In 2010, Apple tailored apps for iPad, developing the best tablet with in reality customized software--compared to home windows capsules operating classes designed for a standard workstation, or Android capsules running stretched models of apps intended for a smartphone.

    Apps get Extensions, no longer accessories

    Apple's deep figuring out of the cost of third party guide in apps is additionally evident in its efforts (on the grounds that 2014) to construct greater techniques for apps to enhance the price of iOS, by way of App Extensions.

    many years ago, Apple noticed big, monolithic Mac purposes like observe and Photoshop as a chance to small developers and innovation in widespread. Working with companions and developers, Apple created a complex document layout designed to grasp many types of distinctive facts that any program might interact with, and also devised a component software architecture that enabled small developers to create practical blocks of software that might prolong the elements of other classes.

    referred to as OpenDoc, the initiative become an immense failure that with no trouble derailed Apple's Claris utility subsidiary and just about destroyed the total company. It turned out that builders failed to wish to construct equipment hidden away in some other app, in colossal part as a result of consumers did not wish to purchase apps characteristic-by means of-feature. The thought of component utility imploded.

    After rebuilding the Mac platform on greater conventional terms with time-honored software titles, Apple added iPhone as a handheld laptop that might run simplified application titles. as a result of the limited reminiscence, computing energy and different components of the long-established iPhone, Apple exerted giant limitations on what apps could do on the platform.

    As iPhones grew extra sophisticated, Apple exerted extra, no longer less, handle over what apps might do. It limited access to place features, the digital camera and microphone devoid of person permission, and required that all apps be bought through a single market place the place they may well be established as official and malware-free--and pulled from distribution if critical.

    while in the beginning broadly ridiculed, Apple's App save strategy turned into obviously superior to other platforms the place "side-loading" and permissive download sharing have resulted in a mess of adware and different malware and where rampant piracy has erased any real business motivation to building native software backyard of spyware. Apple is expanding the potential alternatives for third birthday party developers with App Extensions on the platform it's already the most excellent for doing enterprise.

    while OpenDoc killed developer pastime by means of breaking apps into building blocks that have been not possible to sell, the App store--and its focal point on constructing innovative, fundamental utility--created the biggest market for consumer software ever with the aid of making apps effective ample to achieve valuable projects on their own.

    Apple is now working to give apps new capabilities to have interaction with particular equipment-large aspects by way of "extension aspects." Third parties can exploit these Apple-described mechanisms to create new app experiences: third birthday party keyboards, picture editors, social sharing functions, audio devices, Safari content material blockers--and new in iOS 10--assist for new, developer-branded extensions to Siri, Maps, Notifications, VoIP name dealing with and even CarPlay guide.

    in preference to being OpenDoc-like components, iOS App Extensions are allotted with the dealer's app, and observe instructions to prevent security concerns and system instability from fitting problems. in consequence, Apple is expanding the potential alternatives for third birthday party developers with App Extensions on the platform this is already the most reliable for doing enterprise.

    If there may be a Bot battle coming, it certain seems like Apps are going to win it.


    ASQ is greater than testing equipment | killexams.com Real Questions and Pass4sure dumps

    In-Depth

    ASQ is more than trying out tools
  • via Philip E. Courtney
  • 05/29/2001
  • genuine or false: automatic checking out is the only way to ensure the nice of an software. The reply is dependent upon whom you ask and the depth of his or her adventure. software builders are informed time and again that checking out is the final opportunity to "get it appropriate" in advance of deployment.

    Yet a number of equipment can be used to enrich the first-rate of company applications long before the checking out manner starts off and, in lots of circumstances, lengthy earlier than a line of code is written. "you've gotten got to take the definition of great and make it an awful lot broader," referred to Carl Zetie, senior industry analyst at Giga assistance group, Cambridge, Mass. "Some companies regrettably equate first-rate with utility that would not crash. instead, they should still suppose about 'health for goal' and trace building actions lower back to requirements."

    construction companies that bear in mind necessities can with ease mannequin apps and construct look at various instances that precisely validate the points/services that meet their company wants, say observers. making use of automated utility exceptional (ASQ) disciplines early within the construction lifestyles cycle can increase the high-quality of the software and, over the future, reduce correction and rework.

    "Statistically, 60% to 70% of software disasters may also be attributed to complications early within the life cycle," mentioned Graham Titterington, senior analyst at Ovum Inc., a London-based consulting firm. "probably the most crucial point of high-quality utility beginning is the usage of the suitable process that helps deliver early notification of a problem."

    for a lot of programmers, though, "manner" produces an effect slightly akin to the way "fur" provokes an animal rights terrorist. additionally, confronted with time-to-market pressures, "manner" is customarily expected as a stumbling block to creativity.

    "application developers have an aversion to manner. They consider about programming as a craft," talked about Randy Rice, president of Rice Consulting capabilities, Oklahoma city. "A consistent strategy is needed as a result of quirky software ends up in quirky checking out, and non-standard disciplines cause complications to ripple outward from the starting of the venture."

    as a result, many consultants eliminate the time period "manner" in prefer of monikers like "framework" and "workbench." Or in all probability "methodology," as is the case at Stockholm, Sweden-based telecommunications gigantic Ericsson. constructing hardware and utility accessories from its network Core items community, Ericsson depends on an automated development methodology that flows from requirements through construction and trying out, and into construction deployment. "The want for an automated methodology is very crucial for the birth of excellent products," said Lars Taxen, a member of the Ericsson group accountable for implementation and guide of latest community items. "it's specifically important for us as a result of we have 10,000 design engineers."

    it's also critical because building necessities within the particularly aggressive telecommunications market are not ever fastened, requiring flexibility with out sacrificing quality, referred to Taxen. while fluid requirements can provide most programmers matches, Taxen referred to the eMatrix toolset from MatrixOne Inc., Chelmsford, Mass., has let Ericsson put into effect automated collaborative and incremental building practices while tracing requirements via modeling and checking out.

    "Incremental development is guided by using requirements and allows us to advance and verify functions in smaller, greater meaningful parts," Taxen observed. "We then extend the methodology to look at various more suitable numbers of increments in advance of a product rollout."

    In impact, Ericsson expanded the definition of automated utility quality by way of wrapping the disciplines of necessities traceability, modeling, incremental construction and trying out right into a single comprehensive methodology.

    Defining the necessities

    in the better of worlds, the pleasant engineer would be worried as early as feasible within the application development existence cycle - always during the requirements definition stage as a result of open communications between the QA and construction groups aid build product add-ons that are actually 'testable,' talked about Giga's Zetie. "How can you test a requirement that reads 'the product have to be effortless to set up'?" he said.

    simply as the great of an application is stylish upon extensive checking out, the fine of testing is based on the extent of the necessities. "Testers must build examine situations in accordance with software requirements," mentioned Mary Walker, skills engineer at Logica North america, Lexington, Mass. "otherwise, there's a lack of communique on what really needs to be validated." using the RequisitePro toolset from Rational software Corp., Cupertino, Calif., Logica information application necessities from plenty of sources, together with valued clientele, field personnel, technicians and others. These recorded requirements are reviewed with the aid of software architects, builders and best assurance group of workers as a way to assess resource wants and - deemed equally crucial with the aid of the business - trying out requirements.

    "As part of the manner, testing requirements are described and permitted based mostly upon utility requirements," pointed out Walker. "No code is written in advance of evaluate and approval through all businesses. The introduced verbal exchange helps all and sundry build the highest quality product viable."

    yet another company moving automatic quality disciplines to previous within the construction life cycle is ESPS, a developer of custom publishing utility for a couple of industries that ought to meet strict government legislation demands. "We require a a lot more structured development atmosphere," defined Bob Schatz, executive director of development and operations on the ft. Washington, Pa., enterprise. "It became crucial that we captured all of our necessities and link them with building and trying out actions."

    The want for necessities traceability grew to be evident for ESPS presently after the first release of its product, Core file. in line with Schatz, ESPS need to reply to the instructions and auditing necessities of its consumers, that are directed by using government entities such because the Federal Drug Administration (FDA) or the Environmental insurance policy company (EPA). "We had a long manner to head after the primary unencumber of our product," he spoke of. "as a substitute of attempting to locate a method to re-create requirements from memory, we implemented a tool that helped us reverse engineer our present performance and construct a baseline of requirements."

    ESPS implemented the doorways toolset from quality programs and application Inc., Mt. Arlington, N.J., to reverse engineer existing software into functional necessities. moreover, the company divided and defined requirements based on product traces, first creating a baseline for the core add-ons contained in each and every product, after which developing and linking separate requirements for the various attributes of each individual product.

    "whereas we keep one set of requirements for the base product, the necessities range throughout the add-on products," Schatz said. "Now they're all linked in the doorways database in order that we are able to immediately gain knowledge of the influence of alterations across diverse product traces."


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    Toughening stretchable fibers via serial fracturing of a metallic core | killexams.com real questions and Pass4sure dumps

    INTRODUCTION

    Tough materials found in nature maintain the structural integrity of many biological tissues against external loads. Collagen, e.g., toughens skin in a network comprising bundled fibers that quickly and effectively dissipate energy and prevent cuts from spreading (1). Human muscle is strengthened by the biomolecule titin, which unfolds reversibly to absorb tensile loads (2, 3). These types of tissues not only need to be stretchable to accommodate tensile deformation but should also be tough to avoid mechanical failure. The ability to mimic these properties is important for both practical functions (e.g., packaging and protective equipment) and emerging applications that undergo elongation (e.g., stretchable electronics, soft robotics, and electronic skin).

    Toughness of a material relates to the area under the stress-strain curve. Thus, materials that can elongate to large strains at large stress dissipate the most energy. Previous efforts to create tough materials have used sacrificial bonds that release hidden length when each bond breaks (4–7), structured architectures with different stable configurations that can trap energy (8–10), and interpenetrating polymer networks that have dissipative, reversible bonds (11–13). Here, we use an alternative strategy that combines a soft elastomer (which, in isolation, exhibits large elastic strains but maintains low levels of stress until right before failure) with a metal (which, in isolation, exhibits a large modulus but fails at catastrophically low strains). We use a core-shell fiber geometry comprising a core of gallium metal surrounded by an elastic shell of poly(styrene-ethylene butylene-styrene) (SEBS). The fibers achieve toughness by maintaining the high stress needed to deform the metallic core up to large strains enabled by the encasing elastomer. In this mechanism, energy dissipates via the repetitive, sequential breaking of the stiff metallic core, which is held together by an elastomeric shell that distributes the stress and maintains the mechanical integrity of the fiber. The approach here is a macroscopic analog to molecular dissipation (14) yet uses common elastomers without the need for sophisticated chemistry. Inspired by other tough composite lattices (15, 16), the design provides a strategy to generate tough individual fibers in which the constituent with the higher modulus is encased within a polymer.

    We consider these fibers “metamaterial-like” materials (although they could also be considered composites) because they derive their toughness in a manner similar to mechanical metamaterials, which use structured architectures to achieve atypical or markedly enhanced properties (17–21). For simplicity, we use “metamaterial” instead of metamaterial-like when describing the fibers from this point onward. The structural interplay between the fiber core and shell is reminiscent of “endoskeletons” (e.g., the combinations of bones and flesh in animals or the use of steel reinforcement in concrete). The human body, e.g., can dissipate energy from catastrophic loads via bone breakage but maintains overall structural continuity via the connectivity of the surrounding tissue. Whereas most energy-dissipating metamaterials operate in compression (22–24), the architecture reported here can absorb tensile loads up to 800% strain (compared to 30 to 150% strain for other tensile metamaterials) with an average toughness more than 2.5 times that of titin.

    This approach also distinguishes itself from previous tensile-load–absorbing materials in several other notable ways. The fibers exhibit tunable “J-shaped” stress-strain behavior, a common biological mechanism to allow for natural extension in tissues while preventing damage from excessive strains (25), with the added benefit of dissipating more energy at high strains instead of mechanically failing. In addition, the ability to melt and solidify the metallic core allows the fiber to regain strength after straining through a repairing process and to quickly and reversibly alternate between soft and rigid mechanical properties, which is similar to the collagenous connective tissues of sea cucumbers (26, 27). These types of mechanisms are desirable for tuning the mechanical properties of stretchable electronics, soft robots, and other emerging deformable devices (28–30).

    Moreover, the fibers use a simple architecture with a high aspect ratio geometry (length to width) at all levels of strain, unlike other metamaterials that feature complex designs or larger cross sections at low strains, to incorporate hidden length. This design enables a wider range of applications including incorporation into textiles, fiber-reinforced composites, and braided fibers. Working with liquid gallium also has the advantage that the gallium core could be injected and even moved within a vasculature before solidification, thus enhancing the simplicity and scalability of the fabrication process (31). The gallium core also endows the fibers with beneficial metallic electrical and thermal conductivity, as well as high optical reflectivity, thus making them potentially useful for sensors, interconnects, antennas, and other radio frequency and optical structures. This paper characterizes these tough fibers and the unique interplay between the sequential energy dissipation afforded by the sacrificial fracture of the metallic core and the cohesion and strain localization provided by the elastomeric shell.

    RESULTS Characterization of the tough metamaterial fibers

    Figure 1A depicts a schematic of a core-shell fiber and a cross-sectional view of the fiber (for a more detailed schematic, see fig. S1). The fiber consists of an elastic SEBS polymer shell (which, in isolation, has a low modulus, high strength, and high strain at break) that surrounds a stiff gallium metallic core (which, in isolation, features a high modulus, high strength, and low strain at break). Unless otherwise stated, the outer diameter (OD) of the fiber is 1.2 mm and the inner diameter (ID) is 0.85 mm. Gallium melts with mild heating (T > 30°C), allowing it to be injected into the core of the fiber using a syringe with mild pressure (~1 kPa) that does not distort the fiber shell (32).

    Fig. 1 A hollow polymer fiber filled with solid gallium creates a tough metamaterial core-shell fiber.

    (A) Schematic of the metamaterial (Ga-SEBS) fiber being strained. By inducing multiple breaks in the gallium core, the fiber dissipates large amounts of tensile energy at a near-constant rate. (B) Force versus strain for a solid gallium core (black), a hollow SEBS fiber (red), and a Ga-SEBS fiber (blue). (C) Images of a Ga-SEBS fiber from 0 to 350% strain in intervals of 50% strain accompanied by corresponding stress position graphs. The ordinate depicts engineering stress (in MPa; normalized by the initial fiber cross-sectional area), and the abscissa denotes position (in mm/mm; normalized by the initial fiber length) where zero is the leftmost part of the fiber. For scale, the initial fiber length is 27 mm. (D) A close-up image of a fiber at 800% strain. Scale bar, 1 mm. Photo credit: Christopher B. Cooper, North Carolina State University.

    The schematic in Fig. 1A illustrates the basic principles of the energy-dissipating fiber. At low strains, the fiber features a high modulus (defined primarily by the metallic core) and deforms uniformly, until a break occurs in the core. Normally, a break to a metallic fiber or wire would be catastrophic. However, here, the presence of the polymer shell creates a “polymer bridge” (i.e., a region of polymer with no metallic core) that connects and transfers force between the two separated segments of core metal. As the macroscopic strain of the fiber increases, more breaks occur in the metallic core, and each break introduces an additional polymer bridge supplied by the shell. The failure of the entire fiber eventually arises from the failure of the polymeric shell at high strain.

    Figure 1B compares the force versus strain responses of a solid gallium rod, an empty SEBS fiber, and a Ga-SEBS metamaterial fiber (see fig. S2 for stress-strain data). In Fig. 1B, each sudden decrease in force corresponds to a break in the metallic core of the Ga-SEBS fiber, after which a polymer bridge forms from the encasing polymer. After each break, the force needed to maintain a constant rate of extension increases steadily as the bridge is strained, until eventually the metallic core fractures again and the cycle repeats itself. During these cycles, the strain localizes primarily in the polymer bridges between the breaks, which keeps the overall stress high regardless of the macroscopic strain. This behavior generates a sawtooth-shaped curve centered about the force needed to break the metallic core (see note S1 for additional details) and provides an effective and continuous energy dissipation method. The fiber sustains approximately the same force as the force needed to break the metallic core, but for almost six times the amount of strain.

    For the high-modulus metallic core to serve as the sacrificial material (which gives the fibers their high toughness), the force needed to break the metallic core must be less than the force required to break the polymer shell. Conversely, since the energy dissipation in the fiber arises from the repeated sacrificial fracture of the metallic core, the force required to break the metallic core directly determines the overall toughness of the fiber. Optimization of these factors can be accomplished by tuning the geometry (i.e., cross-sectional area) and material properties (i.e., tensile strength) of each component in the fiber. Here, we use single crystals of gallium, which are soft because they do not exhibit solid solution strengthening or grain boundary strengthening. In addition, they have thermally activated deformation mechanisms because gallium’s melting point is just above room temperature (33). The fiber dimensions (1.2-mm OD and 0.85-mm ID) give a Ga-to-SEBS cross-sectional area ratio of 1 compared to the Ga-to-SEBS tensile strength ratio of 0.92 (based on the values reported in Table 1). These dimensions allow the metallic core to fracture multiple times while maximizing the amount of energy dissipated by the metallic core with each break and thus maximizing the overall toughness of the fibers.

    Table 1 Comparison of mechanical properties of metamaterial fiber to constituent materials.

    Table 1 lists the values for the initial modulus, tensile strength, strain at failure, and toughness at 450% strain for a solid gallium core, a hollow SEBS fiber, and a Ga-SEBS fiber (additional data provided in table S1). At low strains, the gallium core dominates the mechanical response of the fibers, as shown in Fig. 1B, and can be further seen by comparing the moduli of the different materials listed in Table 1. The average modulus of the core-shell fibers is much closer in magnitude to the modulus of a solid gallium rod. The difference in the tensile strength of the solid gallium rod and the Ga-SEBS fiber, despite reaching roughly the same maximum force (as shown in Fig. 1B) is due to the difference in their cross-sectional areas. The force on the solid gallium rod is normalized only by the cross-sectional area of the gallium, while the force on the Ga-SEBS fiber is normalized over the cross-sectional area of both the gallium core and the SEBS shell, although the latter does not contribute to the force at low strains.

    The average toughness of the metamaterial fibers, reported in Table 1, was calculated by integrating each stress-strain curve and was further validated by linear regression on the aggregated stress-strain data (see fig. S3 for more details). The fibers maintain a near-constant stress of 3.9 MPa for an average strain of 450% and achieve a maximum toughness of 25 MJ/m3. Comparing the toughness of the fibers to a hollow SEBS fiber stretched to 450% reveals that the metamaterial fiber exhibits nearly twice the toughness (i.e., it absorbs almost twice as much energy as a hollow SEBS fiber strained by the same amount). These results highlight an important underlying distinction between the energy dissipation mechanisms of the hollow SEBS fiber and the metamaterial fiber; the former only dissipates energy at very high strains, while the latter dissipates energy at a near-constant rate. We used the density of the metamaterial fibers (3410 kg/m3) and the toughness values reported above to calculate the average specific energy absorption (5.1 kJ/kg) and the maximum specific energy absorption (7.5 kJ/kg) for the tough fibers.

    Figure 1C displays a series of images of a metamaterial fiber as it is strained, beginning at 0% strain and increasing in 50% strain increments up to 350% strain. Movie S1 displays the behavior of the fiber as it is strained in real time. While straining the fiber fractures the gallium core, the encasing polymer maintains the overall structural integrity of the fiber. The respective stress position distribution is given on the right of each image. The ordinate in Fig. 1C denotes engineering stress (in MPa; i.e., the force normalized by the fiber’s initial cross-sectional area), and the abscissa denotes position (in mm/mm; normalized by the fiber’s initial length) where zero is the leftmost end of the fiber. Once the metallic core has fractured (see Fig. 1D), the fiber consists of regions with and without metallic cores (we call the latter polymer bridges). Since the cross-sectional area of a polymer bridge is always smaller than that of the core-shell fiber (which includes the areas of both the polymer shell and the metallic core), the stress is always higher in the polymer bridges, which implies that stress is not distributed uniformly along the length of the fiber. For this reason, it is conceptually easier to imagine the system in terms of force, which is constant along the length of the fiber.

    To learn more about the underlying mechanisms behind the metamaterial behavior, we analyzed video footage of the fiber extending (e.g., movie S1). Figure 2A tracks the repeated fracture of the metallic core into smaller segments as the overall strain of the fiber increases. The plot contains bars that represent the length of the metal segments within the fiber (normalized by the initial length of the metal). Initially, the fiber contains only one long metal segment that extends to a flat, knife-edge structure until 125% strain, at which point the first fracture occurs. Each time a new (smaller) segment forms via a fracture, a newly colored bar appears in the chart. In addition, the stress-strain curve for the same fiber is overlaid onto the graph using the secondary ordinate. The plot helps visualize that each sharp drop in stress corresponds to a break in the metallic core. In addition, as the strain increases, the size of each gallium segment becomes more uniform in length. The small piece of gallium that appears at a strain of 2.5 mm/mm at the top of the bar graph is due to a break close to the grip of the extensometer.

    Fig. 2 Characterization of metamaterial fiber behavior.

    (A) Stacked graph of normalized length of gallium segments (left ordinate) at 50% strain intervals for a fiber up to 450% strain. Different colors represent different segments of metallic core within a single fiber. A stress-strain curve for the fiber is overlaid (right ordinate). (B) Graph of the normalized total length of metal segments (red circles) and polymer bridges (blue triangles) compared to the normalized total fiber length (black squares). The dashed lines guide the eye.

    Figure 2B plots the normalized length of the metal (red), the fiber (black), and the polymer bridges (blue) versus macroscopic strain. The total normalized length of the metal increases linearly with that of the fiber until the first break in the metal occurs at a strain of 1.25 mm/mm. After the break, the sum of the metal segment lengths stays nearly constant. Thus, instead of the constituent materials of the fiber straining uniformly after the first break, subsequent increases in macroscopic strain are maintained solely by the elongation of the polymer bridges that appear between the metal segments after each break. The length of these polymer bridges is zero until the first break in the metallic core occurs, thus causing the first polymer bridge to appear.

    Repairing and J-shaped stress-strain behavior

    The fibers can be repaired (and thus be strained repeatedly) by allowing the metallic core to melt and resolidify between cycles. Figure 3A reports the performance of a single fiber that has been tested in such a way. The fiber has been strained to 300% and then relaxed to 0% strain. Heating the fiber above 30°C melts the gallium, which resolidifies at room temperature. The fiber is then strained again to 300% strain. While the results show that the fiber can be used repeatedly, the overall strength and toughness of the fiber decay with each cycle. The ends of the fiber are damaged by the extensometer grip, allowing liquid gallium to escape during the repairing process and introducing pockets of air into the reformed metallic core, which artificially weaken the overall strength and toughness of the fiber. Hollow SEBS fibers are known to exhibit minimal hysteresis over many cycles (34). Thus, if the fiber ends could be sealed to withstand the extensometer grips, then the demonstrated reversibility of the fiber would likely increase.

    Fig. 3 Repairing and J-shaped stress behavior of metamaterial fibers.

    (A) Repairing of the Ga-SEBS fibers is demonstrated by straining a fiber to 300% strain for three cycles with heating in between each cycle to melt and then solidify the gallium core. (B) A single fiber is strained from 0 to 200% strain (reported in the legend as a maximum strain of 2), relaxed, strained to 400%, relaxed, strained to 600%, relaxed, and then lastly strained to 800% to exhibit tunable J-shaped stress behavior.

    The fibers can also be tuned to exhibit the J-shaped stress behavior observed in many biological tissues (i.e., tuned to allow a certain amount of strain at low stress before rapidly increasing to high stress to prevent damage from further strain) (25). Figure 3B demonstrates the ability of the fibers to be tuned to exhibit this behavior at different levels of strain, with the added benefit of dissipating more energy at the high stress instead of simply failing. To demonstrate this behavior, a single fiber is strained to 200% strain, relaxed back to 0%, strained to 400%, relaxed back to 0%, strained to 600%, relaxed back to 0%, and then strained to 800%. In each case, after relaxation, the fiber resumes metamaterial behavior after reaching the maximum strain of the previous cycle. Thus, by prestraining, fibers can be tuned by intentionally introducing fractures to allow some desirable level of strain at low stress, after which the fiber exhibits metamaterial behavior and dissipates energy at high stress.

    Modeling the behavior of a metamaterial fiber during elongation

    To better understand the interplay between the metallic core and the polymer shell, we developed a mathematical model to estimate the theoretical distribution of stresses and strains in different regions of the fiber as a function of macroscopic strain. Once the metal breaks, there are regions with and without a metallic core in the fiber and these regions no longer strain uniformly. The amount of strain experienced by the polymer bridges (i.e., regions with no metallic core) is further complicated by the fact that the polymer in the polymer bridges comes from the “slipping” of the encasing polymer (i.e., the polymer surrounding a metallic core). We sought to understand this behavior by considering two phenomena that must be true: (i) At any cross section of the fiber, the net force must be equal to the force exerted by the grips of the extensometer at the ends of the fiber. (ii) The sum of the lengths of the metal segments and the polymer bridges must always equal the total length (L) of the fiber.

    A full derivation of the equations used in the model is given in note S2. Here, we outline the general process. At a given macroscopic strain (where the initial fiber length, the extended fiber length, the length of the polymer bridges, the length of the metal segments, and the force measured by the extensometer are all measured), we can readily calculate the engineering stress in the fiber and the polymer bridges. On the basis of the mechanical properties of the polymer, we can determine the localized strain in the polymer bridges from the measured force (see fig. S7).

    At this point, we would like to compare the amount of polymer in the polymer bridges and the encasing shell; however, we cannot do so directly, since these regions are at different strains. Thus, we instead evaluate the amount of polymer in each region at hypothetical zero strain (i.e., its length if it elastically recovered to its original state in the absence of stress). We call this the initial length of the polymer, where the sum of the initial length of polymer bridges (i.e., regions without metal) and encasing polymer (i.e., regions with metal) is constant and equal to the initial length of the polymer (i.e., the initial fiber length). Physically, the initial length of a polymer bridge represents the magnitude by which the encasing polymer has transferred (or “slipped”) between the metallic core segments. Movie S2 provides a real-time example of the encasing polymer slipping past a metallic core fracture to lengthen a polymer bridge. Since the encasing polymer continues to slip after a break in the metallic core, the initial length of the polymer bridges is not static, but rather, it is a function of macroscopic strain.

    Once the initial length of the encasing polymer is known, it is possible to estimate the localized strain and stress in the encasing polymer. The remainder of the force in these segments must be sustained by the metal; thus, we can then use this information to estimate the engineering stress in the metal. The resulting model can be used to estimate stresses and strains throughout the fiber as a function of macroscopic strain. To do so, we inputted the stress-strain data from a metamaterial fiber and made the additional assumption that, after the first break in the metallic core, the total length of metallic core is constant (justified by the experimental findings reported in Fig. 2B). We then calculated the respective stresses and strains in different regions of the fiber.

    Figure 4A displays the engineering stress in the fiber (measured by the extensometer) and the estimated engineering stresses in the metal, the encasing polymer, and the bridging polymer as functions of global strain. In regions with metal segments, the metallic core bears most of the stress, while the encasing polymer bears only a small amount of stress. However, this relationship changes as the global strain increases because the strain of the encasing polymer increases as more of the encasing polymer transfers to the polymer bridges. The plot reveals that the engineering stress in the encasing polymer increases monotonically and almost linearly despite the marked nonlinear stress profiles of the other regions of the fiber. This indicates that the encasing polymer continuously transfers into the polymer bridges (which steadily increases the stress in the remaining encasing polymer) as opposed to slipping in large chunks only when a break occurs. This suggests that the elastomeric outer shell continually redistributes stress along the length of the fiber to prevent mechanical failure.

    Fig. 4 A physical model of a metamaterial fiber.

    (A) Measured (i.e., known) engineering stress in the fiber (σf) and estimated (i.e., theoretical) engineering stresses in the metal (σm), polymer bridges (σp), and encasing polymer (Embedded Image

    Embedded Image

    ) as functions of macroscopic strain. (B) Estimated average strain in the polymer bridges (εp) and the encasing polymer (Embedded Image

    Embedded Image

    ) as functions of macroscopic strain. (C) Total measured length (L) of the fiber, along with estimated lengths of the metal (Lm) and polymer bridges (Lp), and estimated initial lengths of the polymer bridges (Lpo) and encasing polymer (Embedded Image

    Embedded Image

    ) all as functions of macroscopic strain. Estimated values are determined directly from the model (see all equations and full derivation in note S2).

    Figure 4B shows how the localization of stress plotted in Fig. 4A affects the estimated strains in the polymer bridges and the encasing polymer. The average strain in the polymer bridges remains almost constant, while the strain in the encasing polymer rises steadily as macroscopic strain increases. Thus, after a break in the fiber core, a small amount of encasing polymer creates a polymer bridge and immediately elongates to high local strain as it bears the full force exerted by the extensometer. As more of the encasing polymer slips into the polymer bridge, the slipping polymer elongates to the high local strain. Thus, the increasing length of the polymer bridges over time is the result of the slipping of additional encasing polymer into the bridges (as opposed to the polymer bridges themselves straining further, which would cause failure at prematurely low global strains). Figure 4C provides further evidence of this mechanism by plotting the estimated normalized lengths of the fiber, metal segments, polymer bridges, initial bridging polymer, and initial encasing polymer as macroscopic strain increases. The initial length of the polymer bridges increases linearly with macroscopic strain, in accordance with a decrease in the initial length of the encasing polymer.

    The model predicts that the behavior of the fiber should be independent of the overall fiber diameter (holding the ratio between the ID and OD constant). We tested this hypothesis with fibers with a narrow range of diameters (ODs of 0.8, 0.9, and 1.2 mm) and found that the performance of the fibers was similar (see fig. S4). We also strained two fibers simultaneously, and both fibers exhibited metamaterial behavior above 500% strain (see fig. S5). These results suggest that the fibers could be scaled in overall size or combined in more complex structures to meet performance requirements; however, further research on the scalability of the fibers is necessary. Last, we fabricated metamaterial fibers using a gallium core and a silicone polymer shell and observed metamaterial behavior that enhanced toughness compared to a hollow silicone fiber up to 500% strain (see fig. S6), indicating that the unique mechanical behavior described is not limited to the Ga-SEBS material system.

    Several noteworthy observations cannot yet be explained fully from the model. First, the metamaterial fibers fail at a lower strain and force than polymer fibers with a hollow core (see Fig. 1B). This observation combined with the variation of the strain at failure (typically 300 to 650%) for the metamaterial fibers suggests that the fibers may be failing at rough spots on the fractured metal segments. Alternatively, it is possible that we are underpredicting the local strain and thus true stress in the polymer bridges or that there are some effects related to a nonuniaxial stress state that cause premature failure of the fiber. Second, the length of the broken metal segments seems to tend toward a characteristic length (~6 mm), which is consistent with previous research that reported controlled fragmentation by cold drawing composite fibers (35). This result could be due to a certain minimum length of metal being necessary to effectively transfer stress between the polymer shell and the metallic core. Note that the model considers only axial forces and treats the fractured fiber as two distinct but otherwise homogeneous components: (i) segments of metallic cores encased by an elastomeric shell and (ii) hollow polymer bridges. However, there is a nontrivial third region where the stress transfers between the two components, which should be addressed with future revisions of the model.

    Postmortem analysis of strained fibers

    We also aimed to identify the mechanism by which gallium elongates and fractures inside the fiber. We noticed striations on the surface of the metal during elongation, which are thought to be slip bands, or material regions where many dislocations traversed the metallic crystal in a single crystallographic plane. These slip bands were investigated in greater detail via a postmortem analysis of strained fiber specimens to reveal information about the active deformation mechanisms in the gallium fibers.

    All examined fibers exhibited consistent slip traces along their whole length, indicating that they are single crystals. No stray grains were observed; solidification appears to have originated from a single nucleus (i.e., the inserted copper wire) in each fiber. With solidification occurring very close to the melting point of gallium, the driving force for nucleation is very low, thus forming few competing nuclei. In addition, all examined fibers flattened during deformation and necked down to a “knife edge,” suggesting that a single slip system dominated the deformation behavior of the crystal.

    Solidified gallium metal has an orthorhombic crystal structure (Embedded Image

    Embedded Image

    ) with an eight-atom unit cell having dimensions unit of a = 4.5259 Å, b = 4.5199 Å, and c = 7.6603 Å (36). A growth direction near the b axis, [010], was determined for the fiber using electron backscatter diffraction (EBSD). This is not surprising, as the b direction is also the elastically softest direction (37), which is commonly a favorable growth direction during the solidification of metals (38).

    We compared the geometry of all possible slip traces of gallium to the experimentally observed slip traces. On the basis of this analysis, the most likely slip system is Embedded Image

    Embedded Image

    . This slip system both closely matches the observed slip traces and has the highest Schmid factor (0.438) of any reported deformation mode in gallium, thus making it the most geometrically favorable. Others have observed this slip system in similarly oriented fibers (36, 39). Assuming that this slip system was active in all fibers, critical resolved shear stresses for deformation between 3.16 and 6.04 MPa were obtained, which agree well with the mean value of 5 MPa reported previously (36).

    In addition, we compared the deformation of gallium with and without a polymer shell. An individual gallium rod (i.e., the core without a polymer shell) fractures on average at a strain of 60%. This result suggests that the gallium rod itself can elongate plastically to 60% strain before failing; however, the first break in a metamaterial fiber (i.e., the same gallium core surrounded by a SEBS polymer shell) occurs on average at a strain of 145%, more than twice that of an unsheathed gallium core. This observation suggests that the SEBS is stabilizing the deformation of the gallium core, delaying the onset of shear localization and therefore delaying fracture. The delay of shear localization in elastomer-coated metal specimens has been reported and explained in detail (40).

    Demonstration of an energy-dissipating fiber

    Last, to help visualize the capabilities of the metamaterial fiber, we compared the performance of the fiber to a hollow SEBS fiber under a load of 5.5 N, which is more than 15,000 times the weight of the metamaterial fiber (see movie S3). Figure 5 (A to C) shows both fibers when the load is initially applied, 1 s after and 15 s after, respectively. The metamaterial fiber strains slowly and constantly for more than 15 s, before failing at around 500% strain. Compared to the hollow SEBS fiber, which hits the substrate almost immediately, the metamaterial fiber holds the load for a period more than 100 times longer. This slow, steady strain rate highlights the high sequential energy absorption of the metamaterial fiber at all levels of strain compared to the low-energy absorption (and thus quick extension) of the hollow SEBS fiber.

    Fig. 5 A demonstration of the metamaterial fiber.

    (A) A load of 5.5 N is applied to both a hollow SEBS fiber (left) and a metamaterial fiber (right). (B) One second later, the SEBS fiber has fully extended and hit the substrate, while the metamaterial fiber still holds the load and continues to slowly extend. (C) Fifteen seconds later, the metamaterial fiber has elongated substantially and continues to hold the load. Photo credit: Christopher B. Cooper, North Carolina State University.

    Acknowledgments: Funding: We acknowledge support from the U.S. Army Natick Soldier Systems Center and the NSF (ERC EEC-1160483 and CMMI-1362284). Author contributions: M.D.D. conceived and designed the project. C.B.C., I.D.J., and D.P.P. carried out fabrication and characterization of the fibers. C.D.C. and R.M. modeled the fiber behavior. V.M.M. and J.N. completed the postmortem analysis of the fibers. C.B.C., M.D.D., and J.G. analyzed the results. C.B.C. and M.D.D. wrote the manuscript. All authors edited the manuscript. Competing interests: The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors.


    International Business Machines Corporation (IBM) Presents at 2018 Wells Fargo Tech Summit (Transcript) | killexams.com real questions and Pass4sure dumps

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    Why Big Data and Analytics? | killexams.com real questions and Pass4sure dumps

    Get the inside story of how analytics is being used across the IBM enterprise in this introduction to Analytics Across the Enterprise: How IBM Realizes Business Value from Big Data and Analytics. This chapter is from the book 
  • “The most competitive organizations are going to make sense of what they are observing fast enough to do something about it while they are still observing it.”
  • —Jeff Jonas, IBM Fellow and Chief Scientist, Context Computing, IBM Corporation
  • This is the story of how an iconic company founded more than a century ago, and once deemed a “dinosaur” that would not be able to survive the 1990s, has learned lesson after lesson about survival and transformation. The use of analytics to bring more science into the business decision process is a key underpinning of this survival and transformation. Now for the first time, the inside story of how analytics is being used across the IBM enterprise is being told. According to Ginni Rometty, Chairman, President, and Chief Executive Officer, IBM Corporation, “Analytics is forming the silver thread through the future of everything we do.” What is analytics? In simple terms, analytics is any mathematical or scientific method that augments data with the intent of providing new insight. With the nearly 1 trillion connected objects and devices generating an estimated 2.5 billion gigabytes of new data each day,1 analytics can help discover insights in the data. That insight creates competitive advantage when used to inform actions and decisions. Data is becoming the world’s new natural resource, and learning how to use that resource is a game changer.

    This book will help you chart your own course to using analytics as a smarter way of driving outcomes. To get the most value from analytics, start with the strategy you are executing and apply analytics to your most important business problems. If you have thought of analytics as only a technology, this book will change that. Analytics is not just a technology; it is a way of doing business. Through the use of analytics, insights from data can be created to augment the gut feelings and intuition that many decisions are based on today. Analytics does not replace human judgment or diminish the creative, innovative spirit but rather informs it with new insights to be weighed in the decision process. Michael Lewis, in his book Moneyball: The Art of Winning an Unfair Game, describes how even in baseball, which is rooted in statistics, analytics enabled the Oakland Athletics to assemble a competitive baseball team, despite paying the third-lowest salaries.2 Analytics for the sake of analytics will not get you far. To drive the most value, analytics should be applied to solving your most important business challenges and deployed widely. Analytics is a means, not an end. It is a way of thinking that leads to fact-based decision making.

    “We believe that analytics is no longer an emerging field; today’s businesses will thrive only if they master the application of analytics to all forms of data. Whether your office is a scientific lab, a manufacturing company, an emergency room, a government agency, or a professional sports stadium, there is no industry left where an analytics-trained professional cannot make a positive impact,” says Brenda Dietrich, IBM Fellow and Vice President, Emerging Technologies, IBM Watson.

    The intent of this book is to take some of the mystery out of how an organization can leverage big data and analytics to achieve its goals by giving current and future leaders a front-row seat to see how analytics was leveraged to transform IBM. Many consultants, academicians, and others have written eloquently on the topic of analytics, but the stories from within IBM as told by the people who learned lesson after lesson will give a real-world perspective on what works, what doesn’t work, and how you can either start or accelerate your own transformation journey.

    IBM has been using what we now call analytics in manufacturing and product design since the late 1950s and in supply chain operations since the 1980s. A pivotal meeting took place in 2004 between Brenda Dietrich and Linda Sanford, then Vice President of Enterprise Transformation, IBM Corporation, when IBM expanded its use of analytics from physical applications, such as supply chain and manufacturing, to applications, such as sales and finance, that did not have processes with such obvious physical characteristics, and IBM’s enterprise-wide transformation journey to use analytics was launched.

    In 2004, Dietrich led the Mathematical Sciences Department in IBM Research, a group that included a range of computational mathematics disciplines, including statistics, data mining, and operations research. Coincidentally, both Dietrich and Sanford received degrees in operations research, which is the practical application of math to real-world problems and was a precursor to much of what is now called business analytics. Sanford had seen the value of the mathematical methods developed in the Mathematical Sciences Department applied to IBM’s supply chain operations.

    Sanford’s transformation team was looking for opportunities to build more analytics capability into IBM’s overall transformation. She knew they had to put measurable successes on the board early to create a sense of credibility for their work. Dietrich and Sanford discussed the IBM sales process and the simple, easily tracked metric annual revenue per IBM seller. The goal was to increase the numerator, to generate top-line growth for the company. They started with a small pilot program, working with sales representatives in the general business group in Canada. That initial pilot was able to use IBM internal data, along with publicly available data, to score sales opportunities. The immediate results were a higher-yield pipeline for the sellers and improved revenue per seller. More importantly, they proved the power of analytics to support growth and transformation.

    IBM has been an avid consumer of analytic capabilities for the past decade. Use of analytics has spread from engineering-based processes, such as product design, through logistics processes, such as supply chain operations, to human-centric processes, such as sales and workforce management. Seeing the cultural shift in the receptiveness to the use of analytics has been amazing to see. When IBM started developing sales analytics tools, many sales leaders were skeptical about the value of such tools, believing that converting an opportunity into a sale was largely a function of the seller’s actions and could not be predicted in advance. But over the past decade, there has been a sea change in attitude. Now sales managers are asking for more analytics support so they can take their organizations to the next level of performance.



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    weSRCH : https://www.wesrch.com/business/prpdfBU1HWO000ZPCB
    publitas.com : https://view.publitas.com/trutrainers-inc/pass4sure-190-833-creating-app-components-using-ibm-workplace-designer-2-5-exam-braindumps-with-real-questions-and-practice-software
    zoho.com : https://docs.zoho.com/file/5psib501bd60e69d5415482449513fefa59ec






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