Snails Walk on Water

first_imgWhy is that scientist staring at a snail?  He’s watching a miracle: walking on water.  This is not our exaggeration: Matt Kaplan on National Geographic News entitled his article, “How Snails Walk on Water Is a Small Miracle.”  If we can figure out the trick, we might be able to make little robots do it – even if we don’t know why we would want to yet, other than it would be cool.    Snails are small enough to be naturally buoyant, but needless to say, getting traction on water is a challenge.  The snail apparently does this by making small ripples.  The ripples are just the right size to give the snail traction without breaking the surface.  It’s a unique method of propulsion unknown till Eric Lauga, a professor of mechanical and aerospace engineering at the University of California, San Diego, decided to investigate.    For a human to do this would require shoes as big as a football field, the article said.  Many capabilities of animals and plants seem miraculous to us, but we sometimes use the word too carelessly.  Jesus walked on water barefoot or on sandals.  That’s a real miracle.(Visited 21 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

Qunu residents share their ‘Madiba moments’

first_img13 December 2013 Residents in Qunu, the tiny village in the Eastern Cape that Nelson Mandela always called home, this week shared their memories of the former president, recalling how humble he was and the excitement they felt when meeting the world’s most admired leader. Mthobeli Jaji met Mandela when the former president visited a local school in Qunu in 1998, and for Jaji it was a moment that he has cherished forever. “He was very humble. I remember he actually shook my hand and asked for my name. I found that to be very humble,” Jaji said. “From that day, Mandela forever represented more than a leader, he was a father figure to me. That is how Mandela will be remembered.” School teacher Mzobanzi Gxobolo said his first “Madiba moment” was when Mandela visited the museum in Qunu several years ago. “That day I was seeing him for the first time, he was wearing one of his trademark shirts,” Gxobolo said. “Even though I never got close to him, the humbleness he displayed when he was interacting with people struck me. I was with my son and I still remember the excitement he felt seeing Madiba. “My second Madiba moment was when I saw him in Mthatha at an event,” Gxobolo said. “That day I managed to take a picture with him, and that picture now hangs on my wall. It’s something I will treasure for the rest of my life.” For a 20-year-old Walter Sisulu University student who did not wish to be named, her moment with Madiba was when he opened a school in Qunu. “I happened to attend [the school] and he came on this day to officially hand over the school,” she said. “I was in the school choir and while we were singing, he joined us and started to dance. All of us were so excited. After that, we took a group picture with him. It was a very exciting moment for all of us.” Asanda Nkwani, who works at a nearby service station, recalls when she and her friends ran after a convoy transporting Mandela to his residence. “He waved at us, but a policemen stopped us from coming closer. But when he smiled and waved at us, it was a moment when I felt I have met him and that he really touched my heart.” Eighty-seven-year-old Mantombi Mbewu said that, although she never met Mandela personally, a framed portrait of him in her living room will always be her Madiba moment. “It’s been hanging there for years and there is not a single day that I don’t look at it. For me, he is part of my family.” Source: SAnews.gov.zalast_img read more

Plan now for the 2019 OCA Replacement Female Sale

first_imgShare Facebook Twitter Google + LinkedIn Pinterest By John F. Grimes, OCA Replacement Female Sale ManagerThe Ohio Cattlemen’s Association (OCA) is announcing an event of potential interest for both the buyers and sellers of beef breeding cattle. On Friday evening, Nov. 29, the OCA will be hosting their seventh annual Replacement Female Sale. The sale will be held at the Muskingum Livestock facility in Zanesville and will begin at 6:00 p.m.The 2019 Ohio Cattlemen’s Association Replacement Female Sale will provide an opportunity for both buyers and sellers to meet the need for quality replacements in the state. Consignments may include cow-calf pairs, bred cows and bred heifers. Females must be under the age of five as of Jan. 1, 2020 and may be of registered or commercial background. Bred females must be bred to a bull with known EPD’s and calves at side of cows must be sired by a bull with known EPD’s. Pregnancy status must be verified by an accredited veterinarian through traditional palpation, ultrasound or by blood testing through a professional laboratory. Analysis must be performed within 60 days of sale. Consignments will also be fulfilling specific health requirements.At the 2018 sale, buyers evaluated 107 lots of bred heifers, bred cows, and cow-calf pairs at the auction. The sale included 80 lots of bred heifers that averaged $1,437, 25 lots of bred cows that averaged $1,377, and two cow-calf pairs that averaged $1,450. The 107 total lots grossed $152,275 for an overall average of $1,423. The females sold to buyers from Ohio, Pennsylvania, and West Virginia.Why discuss a sale that is several months away? As we are in the midst of the 2019 breeding season, now is an excellent time to evaluate your herd and consider marketing decisions for the fall. Young, high quality cattle backed by solid genetics are in demand with potential buyers. Yearling heifers bred artificially to proven calving ease sires are very marketable. A shorter breeding season that results in a tighter calving window has also proven to be popular with potential buyers.It is also a great time to evaluate the body condition of potential sale animals and make nutritional adjustments to the animal’s diet in anticipation of a late November sale date. A Body Condition Score in the 5-6 range on a 9-point scale at sale time is a good goal to strive to achieve. It is my experience that while prospective buyers may complain about overly fat breeding cattle, they certainly resist purchasing breeding cattle that are in thin body condition.Consignments for the sale are due to the Ohio Cattlemen’s Association by October 1, 2019. Sale information can be obtained by contacting the Ohio Cattlemen’s Association at (614) 873-6736 or at their web site located at www.ohiocattle.org . If you have any questions about the sale, you can call me on my cell at (937) 763-6000, or contact me by e-mail at [email protected] Please consider this sale as an opportunity for both buyers and sellers to help contribute to the improvement of Ohio’s beef cow herd.last_img read more

Developers: Why Migrating Apps To iOS 7 Won’t Be That Bad

first_imgRole of Mobile App Analytics In-App Engagement Tags:#app development#Apple#iOS 7 What it Takes to Build a Highly Secure FinTech … The Rise and Rise of Mobile Payment Technology Why IoT Apps are Eating Device Interfaces Related Posts center_img It will still be challenging to upgrade many apps to iOS 7. Boates argues that heavily customized apps like Path and Evernote will have the most difficult time with the new design. Overall though, the work is less daunting then when Apple came out with a new form factor for the iPhone last year.The iPhone 5, of course, featured a larger screen than its predecessors — a 4-inch (diagonal) display instead of 3.5 inches. The bigger screen was more problematic for app publishers than almost anything Apple has done with its flat design principles in iOS 7. “Ultimately, developer time has been more involved when Apple has introduced devices with new form factors — iPhone 4S to iPhone 5, iPhone 3GS to the Retina iPhone 4 and the introduction of the iPad have been where we’ve had the most work,” said Jeff Chow, CEO and co-founder of Boston-based personal assistant app Springpad.Forward Or BackwardRadical iOS 7 Design Is Threat To Some Existing AppsApp publishers must make a choice in iOS 7 if they will support backwards compatibility with iOS 6. That means they would have to support both the flat design of the new version as well as the skeumorphic design of iOS 6. While most iOS users tend to download the latest version of the operating system, many enterprises and organization will have to support iOS 6 for an extended period of time while apps are updated and security protocols tested.“The biggest challenge with supporting iOS7 is going to be figuring out if we’ll support or abandon a divergent design on iOS6,” said Greg Raiz, founder of Boston-based independent app studio Raizlabs. “In general, most apps will be able to migrate over time. As with anything, some apps will take much longer and some may choose to ignore the visual trend.”If you are developing and designing a mobile app for iOS 7, let us know in the comments what kind of challenges you’re facing. Is there a particular aspect of iOS 7 that you find particularly difficult? How does the new flat design directive from Apple affect your product? As mobile developers and designers start digging into iOS 7, the general consensus seems to hold that the latest version of Apple’s mobile OS will give app creators some real headaches.But it may not be that bad. An informal ReadWrite survey of prominent mobile developers suggests that iOS 7 doesn’t reset the playing field for competing apps, contrary to what some developer-pundits have argued. Updating most existing apps to iOS 7’s new aesthetics, for instance, may take some late nights and a significant amount of elbow grease, but it won’t be impossible. And that’s why Apple gives developers months to work out the kinks before launching the final version of the OS, presumably to coincide with the introduction of the next iPhone. (See also: iOS 7 Development: Everything You Need To Know To Get Started)Our mini-survey asked some prominent mobile developers to expound on the challenge and potential of iOS 7 and what it will take for developers to make a splash when the final version of the OS is released later this year. Here’s what we learned.The “Flat” Design Challenges Of iOS 7The fact that iOS 7 migration won’t be impossible doesn’t mean it’ll be easy for all developers and designers. Anyone who wholeheartedly embraced the world of skeuomorphism — that is, designing software objects that resemble physical items such as notebooks or book shelves — with custom made icons and menu bars will have the toughest go of it.Tom Boates, the VP of user experience at Boston-based fitness tracking app RunKeeper, sums up the experience that many developers will face:Updating for iOS 7 will be a bit more work due to fundamental UI changes, but not as much as we initially feared. We have always strived to find a good balance between using familiar stock UI elements and adding some custom elements where it makes sense. Most of the places we used stock elements converted pretty well automatically, and our custom stuff was mostly unaffected.The parts that will require the most work will be any of the custom experiences we’ve designed (tracking an activity for instance), redesigning our header and navigation bar interactions and replacing our iconography.A Big Time Opportunity For Small Apps?How Apple’s iOS 7 Changes Everything For App DesignersRunKeeper was one of the first apps of its kind in Apple’s App Store. As such, it’s enjoyed a significant first-mover advantage over the many, many fitness apps that have followed it. Yet it is precisely these types of apps — older, established apps that enjoy legacy status among users in the App Store — that Instapaper founder Marco Arment believes will ultimately be disrupted by the design challenges inherent in iOS 7. “I don’t think most developers of mature, non-trivial apps are going to have an easy time migrating them well to iOS 7,” Arment said in ablog post on his personal website. “Even if they overcome the technical barriers, the resulting apps just won’t look and feel right. They won’t fool anyone.” Arment is well known for his proclivity towards hyperbole. He has a point in that iOS 7 will provide opportunities for app creators, but probably no more than when Apple added features like Siri or Maps to its iOS stack.“I think it’s an exaggeration,” Boates said. “People download and use apps because they solve a problem they have first and foremost … Your average iPhone user won’t bail on an app they are familiar with that solves their problems and is probably more fully featured in favor of a new player who just has a more iOS 7-like design.”Apple’s New iOS 7: What You Need To Know NowThe window for making a splash with iOS 7 will come when Apple showcases apps employing the new design at the launch of the new iPhone, expected later this year. Apps that Apple has featured with other devices and versions of iOS have done well in the past. Mike Katz, senior software engineer at Boston-based Kinvey, notes the success stories of Flipboard (announced with the original iPad), Path, Paper and Clear.“Like when the iPad came out, expect to see some early and very polished apps that do established tasks but challenge previous paradigms,” Katz said. “This will give enterprising developers good buzz and mindshare — but only for awhile. The big players will eventually catch up, and app usage is driven by their content and ecosystems.”Less Work Than iPhone 5 dan rowinskilast_img read more