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first_img STRENGTH TRAINING This is used to develop strength, power, muscular endurance, and speed. Methods used include weights and plyometrics. Weight training Using weights as a form of resistance training, ( either free weights or weights in machines). Any weight-training programme can take account of your current state of fitness – the amount of weight, the number of repetitions, and the recovery periods can all be adjusted to progressively load muscles. Training for strength involves high resistance (weights) and few repetitions. Training for muscular endurance involves low resistance and many repetitions. Plyometrics This is a series of explosive movements designed to improve muscular power (explosive strength). This involves rebound jumping (on to and off boxes), bounding, leaps, and skips, press-ups with claps, hopping, throwing, and catching a medicine ball. Exercises that involve the contraction of muscles from a stretch position are known as plyometric. Plyometric training puts great stress on the muscles and joints and should only be attempted as part of an organised training programme. CIRCUIT TRAINING This involves a number of different exercises at work stations, which affects the different components of fitness. A circuit usually involves six to10 exercises or activities that take place at the stations. Circuits should be designed to avoid working the same muscle groups at stations that follow one another. The number of work stations, repetition, and the rest periods should add up to 15-20 minutes for one complete circuit. Repeat three to six times, depending on their length. Circuits can be designed for a particular sport. For example, a skill circuit can be constructed for games players wherein exercises can be replaced by short skill practices. FARTLEK TRAINING The name Fartlek comes from Swedish meaning ‘speed play’. It involves ‘run as you please’, alternating fast and slow effort over varied terrain such as grass, sand, flat, hills, etc. Fartlek training doesn’t precisely control the work and rest periods. This is very good for game players since games have many changes in speed. The mix of fast and slow work can be changed to suit the sport and energy system. It is used to improve aerobic and anaerobic fitness, depending on how the training is done. There are a wide variety of training methods based on the ways in which the body adapts to regular exercise. All the methods can be adapted to suit particular training programmes.center_img CONTINUOUS TRAINING This involves the aerobic system and improves endurance. The aerobic system includes the heart, lungs, and vascular system. Activities such as brisk walking, jogging, running, dancing, cycling, swimming, and rowing are ideal examples of aerobic training. The oxygen demand must be matched by oxygen intake. Continuous means you do not stop to rest. It is submaximal, meaning you do not work flat out. This type of training should last for at least 12 minutes in order to achieve adaptations. The intensity of training can be judged from the heart (pulse) rate. Therefore, if you train within certain target heart rate training zones during aerobic exercise, the most efficient gains in aerobic fitness will be achieved without starting to work anaerobically and developing an oxygen debt. This is dependent on age, gender, and resting heart rate of the individual. The target heart training rate zone is worked out by subtracting your age from 220 and then aiming to keep your heart rate between 60% and 85% of this maximum figure. For example, for a person of 45 years who wants to exercise for 20 minutes, three times per week: Max Heart Rate = 220 – 45 = 175 60% of 175 = 105 85% of 175= 150 approximately. Therefore, the person should aim for a target heart rate of 105-150 beats per minute during exercise. INTERVAL TRAINING This involves exercising at a certain rate (work interval) for a certain time then resting for a certain period (rest interval) in order to recover and then repeating the process. Sessions of interval training can be organised into sets with longer rest intervals between sets. For example, running 200 metres in sets of six with a one-minute jog round between each one then resting for a longer period of 10 minutes before repeating the whole process another two times. Both the aerobic and anaerobic systems can be improved using this method. The length of the rest-recovery period depends on how hard you exercise (intensity) during the work interval.last_img read more

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first_img AP November 19, 2018 Updated: 11:47 AM Posted: November 19, 2018 Categories: Local San Diego News, National & International News Tags: Immigration FacebookTwitter Catch and Release is an obsolete term. It is now Catch and Detain. Illegal Immigrants trying to come into the U.S.A., often proudly flying the flag of their nation as they ask for U.S. Asylum, will be detained or turned away. Dems must approve Border Security & Wall NOW!— Donald J. Trump (@realDonaldTrump) November 18, 2018 The Mayor of Tijuana, Mexico, just stated that “the City is ill-prepared to handle this many migrants, the backlog could last 6 months.” Likewise, the U.S. is ill-prepared for this invasion, and will not stand for it. They are causing crime and big problems in Mexico. Go home!— Donald J. Trump (@realDonaldTrump) November 18, 2018He followed that tweet by writing: “Catch and Release is an obsolete term. It is now Catch and Detain. Illegal Immigrants trying to come into the U.S.A., often proudly flying the flag of their nation as they ask for U.S. Asylum, will be detained or turned away.”center_img AP, Mexican protestor today in Tijuana on the caravan: “Donald Trump was right, this is an invasion! What Donald Trump said was correct: this is an invasion!”Crowd chants: “Get out Hondurans, we do not want you here. Get out Hondurans, we do not want you here.” pic.twitter.com/IwytIHZnsM— Ryan Saavedra (@RealSaavedra) November 19, 2018“I was very scared,” Alvarado said.A Tijuana police officer saw them in the crowd and helped them get out and behind police tape marking off the block where the sports complex is located. The protest eventually ended peacefully.Tensions have built as nearly 3,000 migrants from the caravan poured into Tijuana in recent days after more than a month on the road — and with many more months likely ahead of them while they seek asylum in the U.S. The federal government estimates the number of migrants could soon swell to 10,000.U.S. border inspectors are processing only about 100 asylum claims a day at Tijuana’s main crossing to San Diego. Asylum seekers register their names in a tattered notebook managed by the migrants themselves that had more than 3,000 names even before the caravan arrived.For most of this city of 1.6 million, the arrival of thousands of Central Americans is not noticeable. Most migrants stay within a three-block radius of the sports complex that faces the towering metal walls topped with barbed wire at the U.S.-Mexico border.But many residents fear with the passage of time their presence will take its toll and crime could go up. Since 2016, thousands of Haitians who also tried to get to the U.S. ended up settling here, while at the same time, Tijuana has taken in thousands of Mexicans deported from the United States.Tijuana also has been struggling with drug violence and some say they do not want the caravan bringing more problems.Sandra Lucia Montanez, 28, a Tijuana psychologist, said news reports last month of Central Americans storming Mexico’s southern border fed the fears. But, she said, it’s important that Tijuana not forget it is a city of migrants.“Almost no one here is from Tijuana,” Montanez said. “We have to help the neediest ones. They come from countries with a lot of poverty. Honduras is worse off than Mexico.”The United States has dramatically increased border security in preparation for the caravan’s arrival, closing lanes at ports of entry to place cement barriers topped with razor wire that can be quickly moved to block passage should there be a mass number who try to force their way into the country.But the lane closures have also made it harder for cross-border residents to go back and forth into the U.S. to work and shop. The San Ysidro port of entry is one of the world’s busiest border crossings, with more than 40,000 vehicles and 34,000 pedestrians using it daily.On Monday, U.S. authorities closed off northbound traffic for several hours and closed a pedestrian lane at the crossing to install new security barriers, after a tip that people were gathering in Tijuana to rush the border checkpoints.“Waiting until a large group of persons mass at the border to attempt an illegal crossing is too late for us,” said Pete Flores, director of field operations for Customs and Border Protection in San Diego.Some of the demonstrators at Sunday’s protest complained that some migrants have been aggressive, yelling insults at U.S. Border Patrol agents and climbing walls and getting into fights at Tijuana’s Pacific beach.But Tijuana police officer Victor Coronel, who has overseen security outside the sports complex where the migrants are staying, said those fears are based on the bad behavior of only a handful of migrants.“The problem is that there has been bad information circulating on social media, with videos of two or three migrants acting badly, climbing the wall or grabbing food in stores,” said Coronel, adding that most are poor people simply trying to find work.Coronel said he hopes as time passes, many will opt to go home or find jobs in Mexico and integrate into society.Lesbia Navarro, 36, stayed inside the stadium with her four children ages 3 to 16 as they listened to the shouts and insults from the protesters Sunday.“We only want to be here awhile, until we can get into the United States to work,” said Navarro, of Choloma, Honduras. “We don’t want to cause anybody problems.”The Tijuana protests came amid what may be a hardening of positions in some northern Mexican states against the migrants. In Jalisco state, which the caravan passed through on its way to Tijuana, officials said they would no longer open shelters, citing problems with fights involving migrants last week.Instead, the state will provide water, some food and escorts at nine points along the main highway through the state to help ensure the migrants don’t have to stop.Tijuana Mayor Juan Manuel Gastelum has called the migrants’ arrival an “avalanche” that the city is ill-prepared to handle, calculating that they will be in Tijuana for at least six months as they wait to file asylum claims.Gastelum has appealed to the federal government for more assistance to cope with the influx — while more migrants continue to head to the U.S.-Mexico border.Trump used Twitter on Sunday to voice support for the mayor. He wrote that like Tijuana, “the U.S. is ill-prepared for this invasion, and will not stand for it. They are causing crime and big problems in Mexico. Go home!” The Fake News is showing old footage of people climbing over our Ocean Area Fence. This is what it really looks like – no climbers anymore under our Administration! pic.twitter.com/CD4ltRePML— Donald J. Trump (@realDonaldTrump) November 19, 2018___Stevenson contributed from Mexico City. Associated Press writer Marcos Aleman in San Salvador contributed to this report. Migrants fearful, anxious in aftermath of Tijuana protests 00:00 00:00 spaceplay / pause qunload | stop ffullscreenshift + ←→slower / faster ↑↓volume mmute ←→seek  . seek to previous 12… 6 seek to 10%, 20% … 60% XColor SettingsAaAaAaAaTextBackgroundOpacity SettingsTextOpaqueSemi-TransparentBackgroundSemi-TransparentOpaqueTransparentFont SettingsSize||TypeSerif MonospaceSerifSans Serif MonospaceSans SerifCasualCursiveSmallCapsResetSave SettingsTIJUANA, Mexico (AP) — Many Central American migrants camped in Tijuana after crossing Mexico in a caravan said Monday that a protest over the weekend by residents demanding they leave frightened them and left them even more anxious while they try to get into the United States.The angry protests have been fed by concerns raised by President Donald Trump’s month-long warnings that criminals and gang members are in the group and even terrorists.About 500 people demonstrated in an affluent section of Tijuana on Sunday against the caravan. Dozens of protesters then marched to an outdoor sports complex near downtown where 2,500 migrants are staying, sleeping on dirt fields and under bleachers after arriving at the border city a week ago.Dulce Alvarado, 28, from Lempira, Honduras, said she was stepping out of a corner grocery near the stadium carrying her 2-year-old son when she was surrounded by the demonstrators chanting “Get out!” and “We don’t want you here!”last_img read more

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first_img6:32 Share your voice 58 Tags And in case you’re wondering how radio signals create an image, given that we don’t typically get great pictures out of AM or FM broadcasts, keep in mind that our eyes can only process a very limited portion of the spectrum of light (also known as electromagnetic radiation) — the part we call visible light. When we look at a tree or sign, what we really see are photons in the visible spectrum reflecting off those objects. But galactic objects like stars and black holes emit light along different points on the spectrum, including as the low-frequency radiation we know as radio waves. You might feel like imaging a black hole with radio waves is cheating, that we’re not really seeing it by picking up its radio signal, but that’s not right. Think of it this way: A step below visible light on the electromagnetic spectrum is infrared, which we can’t perceive with our eyes but we can feel as heat. Night vision goggles work by converting infrared radiation into visible colors that we can see. This black hole image uses the same concept, converting the energy from a black hole that can be picked up at a massive distance using an ingenious planet-sized telescope into something our dumb eyes can actually perceive.  In other words, it’s not cheating, it’s more like a superpower. And if you think superheroes are cheaters, you’re just jealous.  The Eye of Einstein eye-of-sauronEnlarge ImageThe Eye of Sauron is burned in our brains from Lord of the Rings. New Line Cinema/Screenshot by CNET With its glowing orange ring around a black center, the image of the black hole resembles the Eye of Sauron in the Lord of the Rings movies. The explanation for that draws on the work of Einstein. “If immersed in a bright region, like a disc of glowing gas, we expect a black hole to create a dark region similar to a shadow — something predicted by Einstein’s general relativity that we’ve never seen before,” said EHT Science Council chair Heino Falcke of Radboud University in the Netherlands, in a release. “This shadow, caused by the gravitational bending and capture of light by the event horizon, reveals a lot about the nature of these fascinating objects and allowed us to measure the enormous mass of M87’s black hole.” In other words, we aren’t actually seeing the black hole itself. At the center of a black hole, which Einstein referred to as a “dark star,” is what we call the singularity. This can be created when a large star collapses in on itself, leaving an object of almost infinite density with extremely powerful gravity strong enough to bend light itself. This super sucking power is what creates the dark void we think of as a black hole.  Now playing: Watch this: Besides just being cool, seeing the exact shape of a black hole for the first time was a big deal for science. That’s because it could either confirm or cast doubt upon theories of gravity developed by Albert Einstein over a century ago that are fundamental to our understanding of the universe and the laws of physics that govern our daily lives. “We now have visual evidence for a black hole,” EHT project director Sheperd Doeleman told reporters at a press conference in Washington DC. “It is also consistent, the shape of this shadow … with Einstein’s predictions.” The findings were also announced in a series of six papers published in a special issue of Astrophysical Journal Letters. A telescope as wide as the world Rather than a single observatory, the EHT is eight radio telescopes — located in Hawaii, Arizona, Chile, Mexico and Spain, and at the South Pole — and synchronized to form an array called a Very Large Baseline Interferometer. The basic concept is to combine the signal strength of the observatories on different corners of the globe to form an array as wide as Earth itself. The observation run that produced the image revealed Wednesday actually happened back in 2017. It required the eight telescopes to sync up with extreme precision to observe the galaxy Messier 87 and the supermassive black hole at its center with a mass 6.5 billion times that of the sun. Petabytes of radio signal data were collected — too much to be efficiently transferred via the internet. Instead, each observatory’s data was stored on a physical hard drive and then transported to a supercomputer, where it was merged with the rest to form the new image.  Yes, the resulting image looks a little blurry, but Doeleman told reporters that future images can become much sharper as more telescopes are added to the EHT. A telescope in Greenland has already come online to contribute to the effort. It may also be possible to fine tune the above image as well.  “We think we can make the image perhaps a little sharper through algorithms,” he said. The EHT team has also attempted to image Sagittarius A*, the black hole at the center of the Milky Way galaxy. That data is still being processed, but we could see it soon.  Since humans’ sense of sight is limited to perceiving photons in the visible spectrum, we can’t see — and have a hard time even conceiving of — objects that don’t reflect any visible light (or that swallow it all up, in the case of a black hole). As such, it makes sense that the eye focuses on the colors around the edge of the black hole’s event horizon, which is essentially its perimeter and the point of no return beyond which nothing escapes the pull of the singularity.  The singularity, by the way, might not actually be black. According to Einstein’s theory of gravity, the singularity could be radically warping the space-time around it, and is literally hiding behind its own event horizon. While we still don’t know what this core of a black hole looks like, it’s likely to be a very weird place. Einstein’s calculations indicate that the laws of physics themselves could break down at the singularity.  That’s part of why this image is so important not just to astronomers, but to all sorts of physicists. So far, it seems to be yet another confirmation that Einstein’s theory of gravity is correct.   Originally published April 10, 6:41 a.m. PT.  Sci-Tech Comments Enlarge ImageThe first image of a black hole, captured with the planetwide virtual array called the Event Horizon Telescope. The light is being pulled into the black hole at the center of the Messier 87 galaxy over 50 million light years away.  Event Horizon Telescope It is among the most powerful, confounding and fascinating objects in existence, and on Wednesday humanity finally saw one with its own eyes: Scientists from the Event Horizon Telescope collaboration revealed the first direct image of a black hole.  The image looks a little like an out-of-focus campfire, but the data that went into creating it is actually equal to the amount of selfies 40,000 people might take in their lifetimes, according to University of Arizona astronomy professor Dan Marrone, who spoke at one of six simultaneous press conferences held across four continents. “The observations were a coordinated dance in which we simultaneously pointed our telescopes in a carefully planned sequence,” said Marrone, who traveled to Antarctica several times to integrate the South Pole Telescope into the EHT array. How black holes swallow light, warp space-time and blow… Spacelast_img read more

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first_imgKolkata: The fish loving Kolkatans have reasons to rejoice after the Kolkata Municipal Corporation (KMC) found no trace of formalin in the fish samples collected from nine fish markets in the city after a three-day drive.”We have collected as many as 18 samples of fish from nine markets in the city that includes Entally Market, New Market, Manicktala Market, Poura Parna Bithika Market in Behala, Taltala Market, Orphangunge Market in Kidderpore, Taltala Market etc. All the samples have been tested in our laboratory and we have found no trace of formalin,” Member Mayor-in-Council (Health) Atin Ghosh said. Also Read – Rain batters Kolkata, cripples normal lifeThe drive that was held on July 16, 17 and 18 covered the wholesale fish sellers and samples were picked up from Rohu, Katla and a few Bhetki variety.Ghosh, however, added that the civic body will keep an eye on the markets to ensure quality of fish varieties.”We are planning to conduct surprise drives in the wee hours and collect samples when truck loads of fish reach the markets through import,” he maintained.The drive was conducted after there were allegations of presence of formalin in the fish imported from Andhra Pradesh. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIt may be mentioned that more than half the fish consumed in the city is procured from Andhra Pradesh.Formalin is a preservative that can lead to cancer if consumed over a period of time. The chemical can also cause nausea and other ailments in the short term.Officials of the state Fisheries department have been asked to visit wholesale markets across the city from Saturday to collect samples that will be checked.According to the state Fisheries department stats, the city alone consumes around 235 tonne of fish every day. Fish from Andhra Pradesh – mostly Rohu and Katla – accounts for around 135 tonne of the total consumption.Of around 1.73 lakh tonne of fish that Bengal imports from other states annually, Andhra accounts for around 1 lakh tonne. The Assam government had already banned sale of fish from Andhra Pradesh after lab tests detected formalin in some samples.”Banning of fish from Andhra will be difficult for Bengal. If we stop import, the deficit cannot be met by local production,” an official in the state Fisheries department said.last_img read more

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first_img Posted by Travelweek Group Canada Jetlines picks Halifax Stanfield to be its Eastern base VANCOUVER — Canada Jetlines has set its sights on Canada’s east coast by selecting Halifax Stanfield International Airport (YHZ) as its eastern operational base.As such, the ultra-low cost carrier (ULCC) will offer ultra-low fare service from the airport when it begins flight operations next summer.“We are pleased to announce the selection of Halifax Stanfield International Airport as our eastern operations base. Halifax is the leading airport of the Atlantic provinces and we look forward to lowering the cost of air travel to and from Atlantic Canada with our ultra-low fares,” said Stan Gadek, CEO of Jetlines stated.This announcement marks the third airport that Jetlines has agreed to terms with, in addition to Hamilton, ON and Abbotsford, B.C.Bert van der Stege, Chief Commercial Officer at YHZ added: “We’re delighted that Canada Jetlines has selected Halifax Stanfield as one of their first airports in the country. Experience has shown that the model of low-cost and low-fare travel stimulates demand and we look forward to offering passengers more travel options between Atlantic Canada, Hamilton and Abbostford.”More news:  Carnival Cruise Line enhances HUB app for families and youthCanada Jetlines is set to become Canada’s first ULCC airline, with plans to operate flights across Canada as well as nonstop service from Canada to the United States, Mexico and the Caribbean. During a teleconference in September, Gadek said fares would be “about the same price as a pair of jeans” and announced a “low-fare guarantee” that promises Canadians the lowest fares in the market.Ticket sales will begin through its website at jetlines.ca in Spring 2018. Wednesday, December 6, 2017 center_img << Previous PostNext Post >> Tags: Canada Jetlines Sharelast_img read more

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