– 8:40 p.m: Montego Bay United vs Reno – Montego Bay Sports Complex Paul Young Sr is not the product of a virgin birth, but he is being viewed by many as the equivalent of the football messiah, especially for Red Stripe Premier League (RSPL) club Waterhouse, which he is expected to save. Having recorded the fewest wins, the most losses joint with 11th-placed Rivoli, scored the second fewest goals, only bettering the goal-shy Cavalier, and conced the third highest number of goals, a position they share with today’s opponents Tivoli Gardens, Waterhouse are really in need of a saviour. Young is an accomplished man, having distinguished himself at the high school, university and national levels as a player, and having followed suit at the club level, especially locally. This job, though, may just be his biggest yet as he has not before worked miracles. The much-travelled Calvert Fitzgerald failed to raise Waterhouse’s game from the dead. The loyal Anthony Patrick has since stepped in, but things have not improved at all. In fact, they are a little worse as the club is now firmly rooted at the bottom of the table after 16 games in the season. Young appears unwilling to speak about the current situation and what the future holds, but is perhaps taking inspiration from Humble Lions, who, last year this time, had less than 10 points, but ended up challenging for the title. Games between both teams have always been competitive and, according to Tivoli Gardens assistant coach Damion Gordon, this one could go either way. “History will play a big part in this game. Over the years, games between these two teams have been intense, and it did not matter where on the table one or both of the teams were,” Gordon said. – 3 p.m: Portmore United vs Boys Town – Juici Park, Clarendon – 3 p.m: UWI FC vs Cavalier – UWI Bowl, Mona – 3 p.m: Rivoli vs Humble Lion – Spanish Town Prison Oval – 3 p.m: Waterhouse vs Tivoli Gardens – Drewsland Stadium – 6 p.m: Arnett Gardens vs Harbour View – Anthony Spaulding Complex Today’s games: Tomorrow’s game:
Think how fast 6000 rpm is. It would redline on most cars. Yet you have motors in your body that make that speed look like slow-mo. The Japanese have taken great interest in the cellular machine ATP synthase since its rotary operation was discovered in 1996 (see 12/22/2003 entry). Maybe it’s because they like rotary engines. ATP synthase is an essential protein complex that generates ATP (adenosine triphosphate), the energy currency of the cell. Found in the membranes of mitochondria and chloroplasts, it runs on an electrical current of protons, from sunlight (in plants) or digestion (in animals). It is a reversible engine: it can just as easily generate protons from the dissociation of ATP. It has five major protein parts, including a rotor, a stator, and a camshaft. The F0 domain runs like a waterwheel on protons and turns the camshaft. Three pairs of lobes in the F1 domain catalyze ATP from ADP and phosphate, in a three-phase cycle of input, catalysis, and output. Each revolution generates 3 ATP. Hiroshi Ueno and team, reporting in PNAS,1 have invented new techniques for studying and measuring the tiny motors. Now, with the aid of a high-speed camera running at 8,000 frames per second, they have clocked the rotational speed of the entire F0F1-ATP Synthase motor at 352 revolutions per second, a whopping 21,120 rpm. Although this molecular machine exists in all life forms, they used motors from a thermophilic bacterium. To monitor the action, the team fastened a microscopic bead to the carousel of c subunits. At 25° C, it ran at 230 rps. At 45° C, it ran at 650 rps. Extrapolating up to 60° C, the organism’s optimum growth temperature, they speculate that it could be running as fast as 1,600 rps – an unbelievable 96,000 rpm – and that with nearly no friction and almost ideal efficiency. While they caution that reservation is needed whether these “enormous numbers” are actually achieved, they do say with confidence that the rotation rates they measured are much higher than earlier claims. “It is intriguing to learn,” they say, “whether these rapid rotations are really occurring in living cells.”1Ueno et al., “ATP-driven stepwise rotation of F0F1-ATP synthase,” Proceedings of the National Academy of Sciences USA, 10.1073/pnas.0407857102, published online before print January 24, 2005.We owe an apology to our readers. We have been repeating earlier reports that ATP synthase runs at 6,000 rpm. That’s like insulting the Ferrari company by watching one moving slowly in a parking lot and claiming it is rated at 10 mph. We’re sorry for not giving proper credit to the Designer of this high-performance marvel. Eat your heart out, Charlie.(Visited 38 times, 1 visits today)FacebookTwitterPinterestSave分享0
14 June 2012 Three young people from Soweto in the south of Johannesburg have begun an enterprising journey to uplift and inspire the young people of South Africa, in memory of late student activist Hector Pieterson. Sina Molefi, a half-sister to Pieterson, together with Zuza Mbatha and Tera Gaju, call themselves “activists of Hector Pieterson”, and say they are not out to exploit his name for money, but to use it to make a creative impact on the youth of South Africa whilst creating a legacy for his family. The three started a fashion label in 2007 – which they named after Pieterson – under Abasha Innovations – a closed corporation company they run jointly. They used the brand to commemorate not only the now world-famous teenager, but also all the other victims of the fateful day of 16 June, 1976 – the beginning of the Soweto uprising. Abasha is an isiZulu word that means “young people”. Since its establishment, the aim of the brand has been to preserve the valuable contribution of the youth of South Africa through fashion. Some of the items currently available include accessories like caps and handbags, while they also have ranges in T-shirts, skirts, dresses and suits. The trio’s clothes were initially sold at independent retail stores like the Y Shop in Rosebank and Cyberzone at the Carlton Centre in the Johannesburg city centre, but the team decided to expand and make it available through other channels. And so with their collective vision they began with plans to open a clothing store, which they hope will take his legacy to new heights. The store, expected to open in August, will be located outside the Hector Pieterson Museum in Orlando West. Their immediate plan is a modest one that involves operating the business out of a shipping container to start with, with the hope of venturing into a larger, more conducive space in future. One of the most immediate challenges for the team is securing sponsors for the store. Another idea they had was to get an advertiser to use the container space for exposure of their brand, which would in turn help them finance the day-to-day running of the store. But even that is proving to be a struggle. Once the store is up and running, the items sold will be directly available to their target market, young people in Soweto as well as to visitors to the memorial site. Fashion meets history The fashion identity of the “Hector Pieterson” label is a combination of South African township trends and urban styles, and was started with the hope that it will mean something to young people. “If young people and maybe even adults are wearing the clothes, they will help keep the memory alive,” says Mbatha. He hopes the story of 1976 is alive every day and inspiring change in the youth. Molefi, who is the creative director for the label, is responsible for the designs. She studied fashion design at Parktown College. Mbatha, who has also worked with well-known fashion label Loxion Kulca, manages the operations of Abasha, while the sales and marketing responsibilities of the label lie with Gaju.The Hector Pieterson Foundation The team at Abasha have not left their plans to inspire change entirely up to the success of the store. The company has also signed a binding agreement with the Hector Pieterson Foundation to further help support and empower young people. All profits from the label will go towards the foundation, which was started by Hector’s mother Dorothy and another sister Antoinette Sithole. The foundation’s work focuses on rehabilitating young people from broken families as well as orphans, and inspired by the childhood story of Dorothy, who herself was an orphaned at the age of 10. “The idea behind the foundation is to keep the memory and legacy of Hector Pieterson for generations to come,” says Sithole. The Abasha team hope this process will assist youth projects in previously disadvantaged communities. “Our mission is to uplift youth who are involved in different projects and initiatives so that they can inspire change,” says Mbatha, whose vision for the brand has not changed since its inception. “The youth must come up with their own ideas to create jobs, not just to make money.”The brand’s vision The Hector Pieterson brand will not be confined to South Africa only. Once the label becomes successful locally, Abasha plans to market it overseas and make it available for online purchase as well. “The struggle of apartheid is understood by people around the world and is recognised globally, as there are countries who have overcome similar trials and struggles for freedom,” says Mbatha. He also makes it clear that the label is not meant to be associated with June 16, 1976 or youth month for that matter. “The store will be an on-going, independent commitment to uplift the youth,” he says. “It will be a reminder to all South Africans of the sacrifices that were made for them to enjoy their democracy.” If all goes well with the store and the foundation, Abasha hopes to expand their operations towards designing school uniforms as well. All sales of uniforms made from schools that buy from them will be generously matched by Abasha in the form of donations to disadvantaged schools. “If, for instance, we make a sale of 20 000 school trousers, we will donate another 20 000 school trousers to a school in need of them,” says Mbatha.Support from South Africa The Hector Pieterson fashion brand will showcase its newest items of fashion and accessories at this year’s South African Fashion Week from 30 August to 2 September. Items from the store can also be purchased during the event at the pop-up store at Sandton City. Clothes from the label will also feature on the big screen. Veteran director Faith Isiakpere, a former senior producer at the BBC and filmmaker, approached Abasha last year to provide some of the wardrobe for her upcoming musical Cry for Love, a film inspired by the 2008 xenophobic attacks in South Africa. The clothes can be seen worn by well-renowned local artist Yvonne Chaka Chaka and actor Leleti Khumalo in the film. First published by MediaClubSouthAfrica.com – get free high-resolution photos and professional feature articles from Brand South Africa’s media service.
Vapor permeanceA very attractive property of ComfortBoard IS is the high permeability to water vapor. A 2-inch layer of the insulation has a permeability of about 30 perms, which means it’s highly breathable. If the ComfortBoard is installed on the outside of the wall, the high permeance will allow excellent drying potential to the exterior. This approach, in which the sheathing layer provides the continuous air barrier, is gaining many fans in the building science community.ComfortBoard IS has a textured outer surface (see photos), which may even aid moderately in the product’s drying potential (acting like a rainscreen). When asked about this, Paraic Lally, the North American Manager for Specifications at Roxul, told me that the texturing is a function of the manufacturing process and not designed to provide a rainscreen; thus, the orientation of installation is not important.Another feature of mineral wool that I hadn’t appreciated before is the very low coefficient of thermal expansion with temperature. According to Roxul, the coefficient of thermal expansion of ComfortBoard is just 5.5 (10–6 m/m°C), compared with 80 for XPS and 120 for polyiso. In applications where temperatures fluctuate significantly (like on the outside of a wall in a cold climate) this could make a significant difference. Enter ComfortBoard mineral wool boardstockWith this context, I was thrilled to learn recently that Roxul, a Canadian manufacturer of mineral wool (or rock wool) insulation and part of the global, Denmark-based Rockwool International, has been gaining traction with their residential ComfortBoard IS in the U.S. Plus, the company has a new, even higher-density boardstock product coming out this month for commercial applications. Commercial ComfortBoard on the wayJust as exciting as the increased availability of ComfortBoard IS is a commercial version that’s about to be introduced: ComfortBoard CIS. It is similar to the residential product, but produced at a higher density of 11 pcf. Like Comfortboard IS, it can be ordered up to 6 inches thick, but standard thicknesses will be only up to 3 inches.While I am pleased to have used Foamglas and cork insulation on my home, I suspect that Roxul’s ComfortBoard will find its way into my next project. Availability and priceI was pleasantly surprised recently when I asked Leader Home Center in Brattleboro, Vermont, to price a number of insulation materials for a BuildingGreen report we’re revising. The contractor pricing for ComfortBoard IS came to $0.64 per board foot, compared to $0.48 per board foot for standard polyiso, $0.75 for fire-rated polyiso (Thermax), and $1.07 for XPS.While pricing will doubtless differ in other regions and for different quantities, the fact that ComfortBoard is in the same ballpark as these other materials is great. Even after correcting for the lower insulating value (you need more thickness of ComfortBoard to achieve R-10 than with the foam plastics), Comfortboard IS locally was more affordable than XPS: roughly $1.59 per square foot at R-10 for ComfortBoard vs. $2.14/sf @ R-10 for XPS. Rigid boardstock mineral wool has been available in the U.S. for decades from at least four manufacturers, and it is widely used in commercial construction. But it’s never been widely available for home building.That is changing as Roxul ramps up national distribution of ComfortBoard IS, which was first introduced about a year ago. (A few years earlier the company began national distribution of their ComfortBatt product for cavity-fill applications.)Manufactured at Roxul’s Milton, Ontario, factory, ComfortBoard IS is third-party-certified to have a minimum recycled content of 75%, and the product can be specified with recycled content up to 93%.ComfortBoard IS, the residential product, has a density of 8 pounds per cubic foot (pcf) and is available in four thicknesses: 1 1/4 inch, 1 1/2 inch, 2 inches, and 3 inches. The company has the capability to produce the product up to 6 inches thick — which could offer an attractive option for Passivhaus builders and those interested in deep-energy retrofits — but because thicker panels requires a special production run, those options are only available in truckload quantities.The insulating value of ComfortBoard IS is a very respectable R-4.0 per inch. That’s lower than XPS (R-5 per inch) and polyiso (about R-6.0 per inch), but there will be no “R-value drift” (reduction in R-value over time), which occurs with foam insulation materials that rely on lower-conductivity blowing agents that slowly leak out or allow air to leak in. Readers of this Energy Solutions blog may be aware that I’ve been critical of some of our foam-plastic insulation materials. I’ve come down hardest on extruded polystyrene (XPS), which is made both with a blowing agent that contributes significantly to global warming and with a brominated flame retardant, HBCD, that’s slated for international phaseout as a persistent organic pollutant.So I’m always keeping an eye out for alternatives. I’ve written here about two of those alternatives that I’ve used in our own home: a cellular glass material called Foamglas with high compressive strength that works very well below-grade; and a boutique, all-natural rigid insulation material made from expanded cork.I like both of those materials a lot, but they have two big problems: high cost and limited availability. They just won’t be able to enter the mainstream home building industry since they cost more than twice as much as XPS and polyisocyanurate and are hard to get hold of. Alex is founder of BuildingGreen, Inc. and executive editor of Environmental Building News. In 2012 he founded the Resilient Design Institute. To keep up with Alex’s latest articles and musings, you can sign up for his Twitter feed. RELATED ARTICLES Wrapping an Older House with Rock Wool InsulationInstalling Roxul Mineral Wool on Exterior Walls Installing Mineral Wool Insulation Over Exterior Wall SheathingGBA Product Guide: Roxul Mineral Wool Insulation Batts Insulating Sheathing for Residential Constructionby John StraubeQ&A: Fastening methods for Roxul ComfortBoard IS Q&A: Installing outie windows with 2-inch exterior Roxul board Q&A: Mineral wool exterior insulation, humidity, and windwashing Dimensions and installationAlthough Roxul literature shows ComfortBoard IS being available in three sizes — 24″ x 48″, 36″ x 48″, and 48″ x 96″ — it is most commonly stocked in the smaller sizes. This may be because the larger panels will be fairly heavy. At 8 pcf, a 3-inch-thick, 4′ by 8′ panel weighs 64 pounds — not an insignificant weight to wrestle into place.To achieve a reasonably thick, 4- to 6-inch layer of exterior insulation for a deep-energy retrofit or Passivhaus wall system will require a double layer (unless you have the ability to order by the truckload). This can be an advantage because is allows overlapping the panel joints (only square-edge product is produced), but it will likely increase labor costs.Rigid mineral wool may also take some getting used to from an installation standpoint. It can be cut with a hand saw, though I can’t (yet) report on cutting the product from personal experience. Minimum 1-inch-diameter washers or nail/screw heads are recommended for attachment, and when strapping is installed on the outside to produce a rainscreen, that strapping has to be screwed into wood studs through the insulation. Because it is mineral-fiber product, a dust mask and gloves should be used when working with it.
On Monday, Yahoo announced it was buying Tumblr, the blog network, for $1.1 billion. And then the tweets started, with people declaring that Tumblr founder David Karp was now a billionaire.The conflation of Tumblr’s purchase price with Karp’s net worth assumed that Karp got nearly all of the Yahoo payday. And that’s simply not how it works for venture-backed startups. Investors like Union Square Ventures and Andreessen Horowitz will share in the take, with Karp getting an estimated $275 million.(See also: Tumblr’s Perverse Lesson: To Get Rich, Don’t Make Money)That’s a lot of money, but it won’t get him on Forbes’ list of the world’s billionaires.You try explaining this to people on Twitter, though. A Comprehensive Guide to a Content Audit owen thomas The Dos and Don’ts of Brand Awareness Videos Facebook is Becoming Less Personal and More Pro… Tags:#David Karp#math#startups#Tumblr#Venture capital Guide to Performing Bulk Email Verification Related Posts Sadly, even some respectable publications like Australia’s Sydney Morning Herald made the error:Other people asserted that Karp was a “high-school dropout.” That’s actually a debatable point. He left high school to continue his education through home schooling, and never received a formal diploma.Vespa lover, yes. Billionaire, no.And Business Insider’s Henry Blodget tried to resolve the issue with punctuation:Related stories:Who Hates The Yahoo-Tumblr Deal? Tumblrers, That’s WhoBuying Tumblr Will Leave Yahoo With The Same Old Identity CrisisPhoto by Web09