Polygon. "Operace bouře". Kurs přípravy vojáka VDV za 8 dnů
Re: Různé zajímavosti
Napsal: 18 čer 2017, 22:58
od Polite
Ani Chuck Norris by nedokazal znicit ,,kalacha,,
Re: Různé zajímavosti
Napsal: 21 čer 2017, 12:01
od syos
Organizované kosatky napadají rybářské lodě a terorizují posádky.
Zvířata se naučila cílit na jednotlive lodě a pronásledují rybáře při "divokých honičkách".
Kosatky čekají celý den, až rybáři naplní sítě a potom je olupují. Nejzajímavější na tom je, že jde o zcela nový úkaz. Po desetiletích relativního souznění rybářů s okolím na Alijašce kosaatky útočí v hojných počtech.
"Honily nás z Beringova moře" říká Paul Clampitt, jako hodně člunů, Augustine (náš) má elektronický "ruchotvořič" k odpuzení zvířat, ale na kosatky neplatí. "Stalo se z něho oznámení k věčeři".
John McHenry popisuje kosatky jako "motorkářský gang".
"Nejdříve zahlédnete dvě, a to je konec lovu. Za chvíli jich kolem sebe máte 40."
Gangs of aggressive killer whales are shaking down Alaska fishing boats for their fish: report
The animals have learned to target individual boats, and are leading fishers on high-speed chases to get away
AP Photo/Elaine Thompson)
Tristin Hopper
Tristin Hopper
June 19, 2017
5:21 PM EDT
Last Updated
June 20, 2017
3:01 PM EDT
Filed under
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The orcas will wait all day for a fisher to accumulate a catch of halibut, and then deftly rob them blind. They will relentlessly stalk individual fishing boats, sometimes forcing them back into port.
Most chilling of all, this is new: After decades of relatively peaceful coexistence with cod and halibut fishers off the coast of Alaska, the region’s orcas appear to be turning on them in greater numbers.
“We’ve been chased out of the Bering Sea,” said Paul Clampitt, Washington State-based co-owner of the F/V Augustine.
Like many boats, the Augustine has tried electronic noisemakers to ward off the animals, but the orcas simply got used to them.
“It became a dinner bell,” said Clampitt.
John McHenry, owner of the F/V Seymour, described orca pods near Alaska’s Aleutian Islands as being like a “motorcycle gang.”
“You’d see two of them show up, and that’s the end of the trip. Pretty soon all 40 of them would be around you,” he said.
A report this week in the Anchorage Daily News outlined instances of aggressive orcas harassing boats relentlessly — even refusing to leave after a desperate skipper cut the engine and drifted silently for 18 hours.
“It’s gotten completely out of control,” Alaska fisherman Jay Hebert told the paper.
Fishing lines are also being pillaged by sperm whales, the large square-headed whale best known as the white whale in Moby Dick.
“Since 1997, reports of depredation have increased dramatically,” noted a report by the Southeast Alaska Sperm Whale Avoidance Project.
A remarkable 2006 video by the Avoidance Project captured one of the 50,000 kg whales delicately shaking fish loose from a line. After a particularly heavy assault by sperm whales, fishers are known to pull up lines in which up to 90 per cent of the catch has disappeared or been mangled.
Some skippers will try to outrun a hovering pod, but the time and fuel needed to dodge a persistent gang of whales can wreak havoc on a trip’s profitability.
“I’ve had the same sperm whale follow me 70 miles,” Michael Offerman with the F/V Kristiana told the National Post by email.
While fishing boats all across Alaska have reported harassment by orcas, the worst incidents all seem to be occurring in the Bering Strait, the body of water separating western Alaska from Russia.
In a 2014 study of Alaska fisheries, orcas snatching fish from lines were estimated to cost boats as much as US$500 per day. Compare that to Uruguay, where a 2015 study of boats using similar fishing techniques found that “the presence of killer whales in the fishing ground seems not to affect the catch per unit effort.”
Whale predation on fishing boats is increasing in part due to a rebound of North Pacific whale populations brought about by the 1980s moratorium on commercial whaling.
Up until then, cod and halibut fishers were moving amongst whale populations that had been decimated by whaling fleets — and where survivors had learned to fear the approach of a boat engine.
“When I started fishing in the early 80s, when we saw a whale it was an event,” said Clampitt. “Now, they circle the boat.”
This is not the first time that Alaskan waters have been suddenly thrown into disorder by the changing appetites of killer whales. In the 1990s, researchers found that orca predation was responsible for a sudden collapse in Pacific sea otter populations not seen since the animals were driven to near-extinction by the fur trade.
Orcas have remarkably complex social structures, with regionally distinct languages and hunting strategies. They’re also innovative; orcas have frequently been observed inventing new hunting tactics and then teaching them to others.
Organizované kosatky napadají rybářské lodě a terorizují posádky.
Zvířata se naučila cílit na jednotlive lodě a pronásledují rybáře při "divokých honičkách".
Kosatky čekají celý den, až rybáři naplní sítě a potom je olupují. Nejzajímavější na tom je, že jde o zcela nový úkaz. Po desetiletích relativního souznění rybářů s okolím na Alijašce kosaatky útočí v hojných počtech.
"Honily nás z Beringova moře" říká Paul Clampitt, jako hodně člunů, Augustine (náš) má elektronický "ruchotvořič" k odpuzení zvířat, ale na kosatky neplatí. "Stalo se z něho oznámení k věčeři".
John McHenry popisuje kosatky jako "motorkářský gang".
"Nejdříve zahlédnete dvě, a to je konec lovu. Za chvíli jich kolem sebe máte 40."
Gangs of aggressive killer whales are shaking down Alaska fishing boats for their fish: report
The animals have learned to target individual boats, and are leading fishers on high-speed chases to get away
AP Photo/Elaine Thompson)
Tristin Hopper
Tristin Hopper
June 19, 2017
5:21 PM EDT
Last Updated
June 20, 2017
3:01 PM EDT
Filed under
News World
Comment
Facebook
Twitter
Email
More
The orcas will wait all day for a fisher to accumulate a catch of halibut, and then deftly rob them blind. They will relentlessly stalk individual fishing boats, sometimes forcing them back into port.
Most chilling of all, this is new: After decades of relatively peaceful coexistence with cod and halibut fishers off the coast of Alaska, the region’s orcas appear to be turning on them in greater numbers.
“We’ve been chased out of the Bering Sea,” said Paul Clampitt, Washington State-based co-owner of the F/V Augustine.
Like many boats, the Augustine has tried electronic noisemakers to ward off the animals, but the orcas simply got used to them.
“It became a dinner bell,” said Clampitt.
John McHenry, owner of the F/V Seymour, described orca pods near Alaska’s Aleutian Islands as being like a “motorcycle gang.”
“You’d see two of them show up, and that’s the end of the trip. Pretty soon all 40 of them would be around you,” he said.
A report this week in the Anchorage Daily News outlined instances of aggressive orcas harassing boats relentlessly — even refusing to leave after a desperate skipper cut the engine and drifted silently for 18 hours.
“It’s gotten completely out of control,” Alaska fisherman Jay Hebert told the paper.
Fishing lines are also being pillaged by sperm whales, the large square-headed whale best known as the white whale in Moby Dick.
“Since 1997, reports of depredation have increased dramatically,” noted a report by the Southeast Alaska Sperm Whale Avoidance Project.
A remarkable 2006 video by the Avoidance Project captured one of the 50,000 kg whales delicately shaking fish loose from a line. After a particularly heavy assault by sperm whales, fishers are known to pull up lines in which up to 90 per cent of the catch has disappeared or been mangled.
Some skippers will try to outrun a hovering pod, but the time and fuel needed to dodge a persistent gang of whales can wreak havoc on a trip’s profitability.
“I’ve had the same sperm whale follow me 70 miles,” Michael Offerman with the F/V Kristiana told the National Post by email.
While fishing boats all across Alaska have reported harassment by orcas, the worst incidents all seem to be occurring in the Bering Strait, the body of water separating western Alaska from Russia.
In a 2014 study of Alaska fisheries, orcas snatching fish from lines were estimated to cost boats as much as US$500 per day. Compare that to Uruguay, where a 2015 study of boats using similar fishing techniques found that “the presence of killer whales in the fishing ground seems not to affect the catch per unit effort.”
Whale predation on fishing boats is increasing in part due to a rebound of North Pacific whale populations brought about by the 1980s moratorium on commercial whaling.
Up until then, cod and halibut fishers were moving amongst whale populations that had been decimated by whaling fleets — and where survivors had learned to fear the approach of a boat engine.
“When I started fishing in the early 80s, when we saw a whale it was an event,” said Clampitt. “Now, they circle the boat.”
This is not the first time that Alaskan waters have been suddenly thrown into disorder by the changing appetites of killer whales. In the 1990s, researchers found that orca predation was responsible for a sudden collapse in Pacific sea otter populations not seen since the animals were driven to near-extinction by the fur trade.
Orcas have remarkably complex social structures, with regionally distinct languages and hunting strategies. They’re also innovative; orcas have frequently been observed inventing new hunting tactics and then teaching them to others.
To nejdůležitější o čem je toto vlákno tu není, Video. Srovnejte se trochu, zamyslete se nad tím co postujete, jsme AK.
Re: Různé zajímavosti
Napsal: 03 črc 2017, 21:11
od petrp
Očistec - brutální film zachycující válku v Čečensku
Válečné drama odehrávající se v nemocničním komplexu v Grozném. Uprostřed téměř dokumentaristicky vykreslených bojů sledujeme ruskou jednotku a čečenské žoldáky. Scény jsou podány tak pravdivě, že realita nemůže být drsnější. Tento film není jako ČETA. Neukazuje však o nic méně smutnou tvář války. Jen v ruském podání.
Fyzika dostává na prdel a to pořádně. Tohle může vymyslet jen nedouk. Jediný (pocitový) efekt může mít zvýšení proudění okolo předmětu - wind chill, neboli zchlazení větrem a to opravdu není tento případ, kdy proudění postavím do cesty překážku.... :dobre:
Fyzika dostává na prdel a to pořádně. Tohle může vymyslet jen nedouk. Jediný (pocitový) efekt může mít zvýšení proudění okolo předmětu - wind chill, neboli zchlazení větrem a to opravdu není tento případ, kdy proudění postavím do cesty překážku.... :dobre:
To je ale termodynamika. Ono to může trošku fungovat, ale jen obtížně měřitelnou trošku a kousek od hrdel flašek, než se vzduch okolní a přímý smíchá. Pocitově ale to bude zřejmě mít pozorovatelný efekt.
Vyšší tlak v láhvi vede k oteplení vzduchu, vnějškem ovukované stěny jej ochladí a hlavně z flašek pak jde větší rychlostí (a tedy nižším tlakem a nižší teplotou - viz Bernoulli, ale jak se o něco zastaví, tak teplota celkově bude zas původní). Samozřejmě pokud by to bylo v uzavřené krabici, tak bude výkon ventilátoiru tuto krabici ohřívat a je úplně jedno, jestli fouká do flašky nebo ne. Stejně tak tomu bude ve vzdálenosti větší než půl metru od ventilátoru - zde naopak dojde k tomu, že líp by se člověk cítil, kdyby tam ty flašky nebyly.
Vždyť takhle funguje i lednička, jen s minimálně řádově větším chladícím výkonem. Tedy je to něco jako provozovat otevřenou ledničku v místnosti a libovat si jaké mám skvělé chlazení.
Vždyť takhle funguje i lednička, jen s minimálně řádově větším chladícím výkonem. Tedy je to něco jako provozovat otevřenou ledničku v místnosti a libovat si jaké mám skvělé chlazení.
Asi tak - nula od nuly pošla plus teplo z motora
Re: Různé zajímavosti
Napsal: 07 zář 2017, 17:55
od syos
Born From Urgency - Faces from the Frontline Against ISIS
Nezávislý novinář/fotograf Joey L. spolu s Kurdskými válečníky na frontě proti ISIS.
