(CLICK HERE, if you are unable to view this photo gallery on your mobile device.)OAKLAND — Derek Carrier kept the ball he caught to give the Raiders a stunning comeback win, the ball that became only his seventh catch in 13 games when Derek Carr found the backup tight end on 4th-and-goal from 6 yards out with 21 seconds remaining. Carrier caught five passes in his first 12 games. His seventh catch of the year gave the Raiders a 23-21 lead over the division-leading Steelers as afternoon turned …
SANTA CLARA – Rookie Deebo Samuel officially signed Thursday and is on his way to catching presumably hundreds of passes for the 49ers. When training camp starts Friday, however, he’s got a lot of catching up to do.Samuel missed the final couple weeks of the offseason program with a minor hip issue.Then, before he flew Thursday from North Carolina to the Bay, he missed out on Jimmy Garoppolo’s informal passing sessions with the 49ers incumbent wide receivers at San Jose State in recent days.C …
Sometimes engineers investigate things biologists take for granted. Flying fish have been observed by countless sailors and cruise passengers, and have been described by life scientists. It took an engineer, however, to investigate these “unexpected fliers” in a wind tunnel. Surprisingly, though many have speculated about these creatures, “detailed measurement of wing performance associated with its morphometry for identifying the characteristics of flight in flying fish has not been performed” till some engineers caught the inspiration. Haecheon Choi, a Korean mechanical engineer, took an interest in flying fish while reading about them to his children. According to Science Daily, a scientific paper in the Journal of Experimental Biology resulted (see the JEB press release; the paper is available for free).1 Choi and a colleague Hyungmin Park designed experiments using a wind tunnel to measure the gliding efficiency of flying fish. It was difficult obtaining specimens, the article told; they couldn’t find them in Japanese fish markets, so they got a permit to fish for them in the open sea. Out of 40 fish caught, five were dried and stuffed (they would have died anyway in the wind tunnel, you know) and outfitted with sensors to measure their aerodynamics. Some had their pectoral and pelvic fins outstretched in gliding position, or just the front pectoral fins outstretched, while one, as a control, was measured with all its fins in swimming position. “For the first time, we have performed a direct wind-tunnel experiment to investigate the aerodynamic properties of flying-fish flight and provided qualitative and quantitative data for the flying fish flight,” they were able to boast. The pair was impressed by their gliders. “Choi and Park found that the flying fish performed remarkably well: the gliding performance of flying fish is comparable to those of bird wings such as the hawk, petrel and wood duck,” they said in the JEB paper. The fish performed best in their natural horizontal position close to the water, avoiding the wing-tip vortices that otherwise would cause the most frictional drag. When gliding above water, their lift-to-drag ratio actually increased, measurements of flow patterns in the wind tunnel showed. “Park explains that the tandem arrangement of the large pectoral fin at the front and smaller pelvic fin at the back of the fish’s body accelerates the air flow towards the tail like a jet, increasing the fish’s lift-to-drag ratio further and improving its flying performance even more.” The fish have other morphologic adaptations to improve lift, such as a torpedo-shaped body, a flattened bottom, and the ability to rapidly wag the tail fin on take-off to get airborne, a behavior called taxiing. Not only are their wing-fins well-adapted for gliding in the air, they are also ideal for swimming in the swept-back position. “So flying fish are superbly adapted for life in both environments,” the article said. The intro also contained these fast facts: “Flying fish can remain airborne for over 40s, covering distances of up to 400m at speeds of 70km/h” (that’s about a quarter mile in 30 seconds aloft, gliding at over 40 miles per hour). The authors said, “The aerodynamic performance of flying fish is comparable to those of various bird wings, and the flying fish has some morphological characteristics in common with the aerodynamically designed modern aircrafts.” It can reasonably be assumed that live fish perform even better in their natural habitat, with wet skin, the ability to adjust wing camber and attack angle using their muscles, and with additional taxiing movements to stay aloft. With results in hand showing high performance in the flying fish due to good design, the researchers’ thoughts turned to biomimetics: “Having shown that flying fish are exceptional fliers, Choi and Park are keen to build an aeroplane that exploits ground effect aerodynamics inspired by flying fish technology,” the article ended, stating nothing about evolution or how this flight technology might have evolved.1. Hyungmin Park and Haecheon Choi, “Aerodynamic characteristics of flying fish in gliding flight,” Journal of Experimental Biology, 213, 3269-3279 (2010); published by The Company of Biologists 2010; doi: 10.1242/jeb.046052.It is a pleasure to report good scientific work that is not dependent on Darwinian storytelling (cf. 09/10/2010). Most of the elements of classic science are here: noticing an interesting phenomenon, observing it carefully, asking questions, searching existing literature, proposing an experiment to gather more detailed data, obtaining specimens, designing an experimental apparatus, running controlled experiments and taking measurements, evaluating the findings, publishing, and suggesting applications for the benefit of humanity. What’s missing is Darwin worship, thank God. The original paper had no use for evolutionary theory. The authors stayed out of political trouble by donating the required pinch of incense to Emperor Charlie: “the flying fish has evolved to have good aerodynamic designs (such as the hypertrophied fins and cylindrical body with a ventrally flattened surface) for proficient gliding flight,” they said, but the emphasis of even that statement was clearly on the design, not the evolution. From then on, they left the Charlie Temple turnstile behind, and focused on the good engineering (intelligent design) of their fish. They did not even try to speculate on the origin of the adaptation, other than to say, “Although reasons for the flight of flying fish have been suggested (i.e. escape from underwater predators or saving of transport cost) (Rayner, 1986Go; Davenport, 1994Go), the exact reason is still not clear. Nevertheless, their behavioral adaptation for flight is quite unique.” Those statements would be just as comfortable in a creation paper. They dodged the temptation to tell an evolutionary just-so story (see next entry), and focused instead on the design. And thankfully, we were also spared a miracle story about “convergent evolution,” or the genes for flight being pushed back to some imaginary ancestor of fish and birds. It takes discipline to avoid falling into these Darwin traps. Engineers are comfortable with the concept of intelligent design. The authors work for the School of Mechanical and Aerospace Engineering and the Institute of Advanced Machinery and Design at Seoul National University. Does design-focused research of the living world produce good science? Here was one more great example. Maybe some day we’ll be able to buy cars that can sprout wings and glide across a lake – thanks to flying fish and design-conscious science.(Visited 46 times, 1 visits today)FacebookTwitterPinterestSave分享0
Brand South Africa sends condolences to those who have lost loved ones in Knysna fires.Brand South Africa’s Chief Executive Officer, Dr Kingsley Makhubela says, “We send our deepest condolences to families who have lost members in the tragedy.”Johannesburg, Thursday 08 June 2017 – The Western Cape Province is tackling massive wild fires in the Knysna area and after overcoming rain storms in the city which left thousands of local residents displaced. Although the storms have subsided the wild fires continue to cause havoc and a number of homes have already been burned down with over 10 000 residents being evacuated.According to reports the fire in Knysna is the largest and most destructive fire in a built up area in the Western Cape. The National Disaster Centre and the SANDF are working on controlling in putting out the fire.Brand South Africa’s Chief Executive Officer, Dr Kingsley Makhubela said, “We send our deepest condolences to families who have lost members in the tragedy. Brand South Africa is working closely with the Gift of the Givers in providing humanitarian support in the form of food, water, shelter. Now more than ever it is important for citizens to unite and play their part by assisting in any way they can”.“The first delivery of bottled water destined for Cape Town is now re-routed to Knysna and is a few hours away from the town. Contributions in cash and kind for the Western Cape areas will be accepted”, said Mr Sooliman from Gift of the Givers.Cash contributions can be made into the Gift of the Givers account, Standard Bank, Pietermaritzburg, Account number 052137228, Branch Code 057525Please send deposit slip to [email protected] section 18A tax certificates will be issued on request. For more details call toll-free on 0800786911.
Fellow South Africans,I am greatly saddened to announce that 67 South Africans died and scores of others sustained injuries, after a building at the Synagogue Church of All Nations collapsed on Friday, 12 September 2014, in Lagos, in the Federal Republic of Nigeria.This is a particularly difficult time for South Africa. Not in the recent history of our country have we had this large number of our people die in one incident outside the country.Our thoughts are with the families, friends and colleagues that have lost their loved ones in this heartbreaking tragedy. The whole nation shares the pain of the mothers, fathers, daughters and sons who have lost their loved ones. We are all in grief.As we mourn this sudden and tragic death of our fellow compatriots, I have directed the relevant government departments and entities to act with the utmost urgency to ensure that we facilitate the movement of relevant family members to Nigeria to identify the bodies of their loved ones and to ensure that we repatriate the remains as soon as possible under the circumstances.I would like to take this opportunity also to thank all family members and friends who have provided information to government, which has assisted the South African High Commission in Nigeria in its efforts to locate our fellow citizens.I would also like to commend all affected families for their patience and resolve during this very painful period.On behalf of the Government and the people of South Africa, I would like to thank the Government of the Federal Republic of Nigeria for its support during this difficult time. We also send our sincere condolences to the people of Nigeria and all other nations affected by this tragedy.I would like to assure all affected families that the Government will provide all the necessary support.Government will keep the public informed of developments around this tragedy.May the souls of the departed compatriots rest in peace.I thank you.Related links:http://www.southafrica.info/global/reconnectsouthafrica/
Last week I received a call from an entrepreneur. He’s got a successful business, and he just started a new business. This entrepreneur called to ask me to help him with one question he had about providing references to a big prospect he was close to closing. I mentioned a couple posts about providing references, and he replied that he had read all of them.In the middle of the sales process, this entrepreneur-salesperson mentioned to his prospective client that he could provide references of big, reputable companies should they require them. As they approached the time to decide, they asked him to provide those references. His problem is that his new business doesn’t have the references he casually mentioned to his prospective clients.I don’t know the person I am writing about here. But I don’t think that he is guilty of malice aforethought when he promised to provide the references he didn’t have. I suspect he was caught up in the moment when he made that promise.I didn’t have a lot to offer the caller in the way of helpful ideas. The best I could do was to tell him that I would tell them the truth, that I didn’t have any references from this new business, but that I have plenty from my existing business that could vouch for my character. I told him that he could also make them a special deal to avoid the risk of being his first customer in the new business if they needed greater assurance than references from his other business.It’s important not to make promises casually. You may not believe that the promise is a big deal or that you are going to have to keep it. But your prospective client is likely to remember.You never want to start a relationship with a lie. There is no business that is worth gaining if you have to lie to obtain it. Even little white lies.
TagsTransfersAbout the authorPaul VegasShare the loveHave your say Man Utd draw up seven-player shopping listby Paul Vegas9 days agoSend to a friendShare the loveManchester United have drawn up a seven-player shopping list.The Red Devils are desperate for reinforcements having endured their worst start to a top-flight campaign in 30 years.ESPN says manager Ole Gunnar Solskjaer and chief Ed Woodward have their eyes on seven signings to restore their ailing fortunes.Mario Mandzukic, Bournemouth’s Callum Wilson and Lyon’s Moussa Dembele are the attacking targets.While Declan Rice, John McGinn, James Maddison and Ivan Rakitic are also being eyed to bolster the midfield department.
(Photo by Ronald Martinez/Getty Images)In the loaded Big 12, Texas Tech has been an afterthought. Coming into tonight’s game with No. 9 Iowa State, the Red Raiders were 0-6 in conference play, but Tubby Smith’s team jumped all over the star-studded Cyclones from the get-go. Tech opened up a 19-point lead at one point, but Iowa State came back to cut the lead to three with 23 seconds left. Iowa State would never get closer than that. Tech’s Devaugntah Williams hit two free throws to extend the lead to five, and as the final buzzer sounded, hundreds of Texas Tech fans flooded the court and mobbed the team.
nebraska spring offense highlight videoNebraska had a disappointing 2015 season, but after an impressive victory over UCLA in the Foster Farms Bowl, there is hope in Lincoln. Thursday, the program gave fans an interesting inside look at how the team’s offense is progressing this spring.In the below clip, head coach Mike Riley makes it clear that everyone – including the players and the members of his staff – is more comfortable with the team’s scheme in year two of his tenure. He talks about “continuity” being a great thing for the development of football players.O-Blockhttps://t.co/T8YWLlsKCG— Nebraska Football (@HuskerFBNation) April 7, 2016Nebraska actually finished 34th overall in total offense in the FBS in 2015. It’s the defensive side of the ball that the team must improve upon in 2016 if it wants to take the next step.
APTN National NewsThe Committee on Abuse in Residential Schools, or CAIRS, runs a drop-in centre in Whitehorse for residential school survivors.After funding from the Aboriginal Healing Foundation ended last year, it is now fighting to keep it’s doors open.APTN National News reporter Shirley McLean reports.