Using technology, of course. While special services via webcam(摄像头) and cheating detecting software have been developed now, Mettl, an online company, has developed advanced techniques for netting cheaters, which the company claims are even more reliable and easier to use. Whatever small attempt to cheat, he or she will be found out.

    Mettl has adopted a handful of technologies on its test—taking platform, creating a mini monitoring state in an exam. Here's how it works: A test-takersigns on to Mettl and selects hisher exam from the site's library of pre—loaded tests. Facial and keystroke recognition technology confirm the person that has signed in is the very person, and the system records both the test—taker(through the webcam)and the test—taker's screen throughout the test.

    Mettl's technology uses the test—taker's webcam to detect how many people are using the computer. Soon, it will track eye movement well enough to sense whether the test-taker is looking away from the screen, perhaps to Consult a smart phone or a friend in secret. Mettl also monitors the test-taker's screen and can detect when the test-taker has changed a computer or moved from the test. The system will soon be able to record sound, thus detecting whether the test-taker is talking or being talked to.

    If any irregularities are detected, the system flags the incident and reports it back to the test's administrator. This can bring any number of things, depending on the test-giver's wishes: a completeshutdown of the exam, a warning message that appears on the test-taker's screen, even human instructions from the control center.

    Mettl is hoping its technology will help it break into the country's big MOOC markets.

    Fascinated with images from the Mars Rover? It turns out you don't have to go to space. The following spots may look like they are on another planet, but they are right here on earth.

    * Socotra Island, Indian Ocean

    The largest of the four-island Socotra Archipelago, the island has about 250 species of plants that are not found anywhere else in the world. This includes the canopy-topped dragon's blood tree, which has blood-red resin(树脂）that runs down if the trunk is cut deep. It can grow to 10 feet with a bulbous(球根的）trunk that swells with water absorbed in case of dry weather.

    See it for yourself: There are regular flights from the Yemen capital of Sanaa on(Felix Airways) ($ 180 each way)

    * Vermilion Cliffs National Monument, Arizona

    This wilderness in Northern Arizona/southern Utah is home to some of the most striking landscapes in the American Southwest. The nearly 300,000-acre site is known for its abundance of colorful shale（页岩）and Navajo sandstone that has been eroded(侵蚀）by the elements to create cliffs that rise as high as 3,000 feet. In the northwest of the park is the Coyote Buttes, where you'll find The Wave, a wall of red sandstone that twists and turns in a way that just doesn't look natural —but is.

    See it for yourself: Permits are required to hike in Vermilion Cliffs. Paria Canyon and Buckskin Gulch permits are available at on-site pay stations or in advance ($5 per person).

    *Perito Moreno Glacier, Argentina

    The huge size of the Perito Moreno Glacier is unbelievable— it is more than 50 miles in length and 500 feet deep. The terminus(终点）of the glacier is Lago Argetino, where a 50-foot blue-hued ice wall rises from the lake. The Perito Moreno is also one of the only glaciers left on earth that is still growing.

    See it for yourself: Many tour companies offer day trips to Perito Moreno from El Calafte. Viator's full-day tour includes transportation from a local hotel and a guided tour for $ 106 per person.

    The health-care economy is filled with unusual and even unique economic relationships. One of the least understood involves the peculiar roles of producer or “provider” and purchaser or “consumer” in the typical doctor-patient relationship. In most sectors of the economy, it is the seller who attempts to attract a potential buyer with various appealing factors of price, quality, and use, and it is the buyer who makes the decision. Such condition, however, is not common in most of the health-care industry.

    In the health-care industry, the doctor-patient relationship is the mirror image of the ordinary relationship between producer and consumer. Once an individual has chosen to see a physician — and even then there may be no real choice — it is the physician who usually makes all significant purchasing decisions: whether the patient should return “next Wednesday”, whether X-rays are needed, whether drugs should be prescribed, etc. It is rare that a patient will challenge such professional decisions or raise in advance questions about price, especially when the disease is regarded as serious.

    This is particularly significant in relation to hospital care. The physician must certify the need for hospitalization, determine what procedures will be performed, and announce when the patient may be discharged. The patient may be consulted about some of the decisions, but in general it is the doctor's judgments that are final. Little wonder then that in the eye of the hospital it is the physician who is the real “consumer”. As a consequence, the medical staff represents the “power center” in hospital policy and decision-making, not the administration.

    Although usually there are in this situation four identifiable participants— the physician, the hospital, the patient, and the payer (generally an insurance carrier or government)— the physician makes the essential decisions for all of them. The hospital becomes an extension of the physician; the payer generally meets most of the bills generated by the physician/hospital, and for the most part the patient plays a passive role. We estimate that about 75-80 percent of health-care choices are determined by physicians, not patients. For this reason, the economy directed at patients or the general is relatively ineffective.

    It was dawn of March 21, 2018. Gary Messina was on his morning run along New York City'8East River. Suddenly something caught his eye—a large 60-year-old man balancing on the four-foot-high fence that guarded the path from the water. As Messina got closer to the scene, the man took a step forward and slipped into the dark river below.

    When Messina reached nearer, the man was struggling in the water, clearly unable to swim. Other joggers also heard the man's cry. David Blauzvern and John Green dropped their phones and keys on land and jumped in. “ People had called the police, but it was unclear when they'd get there,” says Green. “We just reacted. Messina joined them in the river. Just as the jumper was losing strength, Blauzvern take hold of him. The pair were about 30 yards from the seawall when Messina and Green caught up to them. They seized the man, with Blauzvern supporting his back and Messina and Green holding him up from either side. As the men made their way toward the concrete seawall that stretched for blocks in each direction, Blauzvern had an awful realization:there was no way out of the river.

    By now, a crowd had gathered on land. “A rescue boat is on its way, someone yelled to them. Swimming forward was getting tougher by the minute. The jumper, who was six foot two and weighed around 260 pounds, was heavy in his rescuers' arms. After ten minutes, they managed to get to the river's edge. “I've never been so out of breath, ”says Blauzvern.

    Fifteen minutes after the men had jumped into the river, the two-man rescue boat appeared. But because it couldn't risk getting too close to the seawall, the men had to swim out to it. “I was completely out of energy at this point, “says Blauzver. The men in the water pushed the jumper while the men in the boat pulled him up and, finally, to safety. The man they had saved was taken to the hospital for evaluation(评估). Details on his condition have not been released. As for the rescuers, each of them was at work by 10:30a. m. “I was a bit late,” admits Blauzvern, smiling. “But I had a good excuse.”

    Win a Family Vacation!

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    Enter the RD Travel Sweeps by 11:59 pm EST on June 14, 2018.

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    The sweepstakes（彩票）open to legal US citizens of the United States who are 21 years of age or older at the time of entry. Void（无效）where forbidden by law.

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ZOOKEEPER FOR A DAY

    Go wild with an extreme zookeeping experience!

    The Khaki Extreme program is a wild behind-the-scenes zookeeping adventure like no other! The program offers the chance for 11-15 year olds to see first-hand what's involved in looking after amazing wildlife at Australia Zoo.

    During the guided adventures, you'll gain an understanding and appreciation of what's involved in working in one of the world's most popular zoological and conservation areas, and you'll love getting up close with the awesome animals.

    Whether it's helping keepers prepare diets for the animals, cleaning enclosures (围场) for large animals, or making improved activities for Australia Zoo's wildlife — you will have a chance to get involved at grass-roots level.

    After a busy morning getting up close with wildlife, you can enjoy a specially provided lunch while watching the performance in the world-famous Crocoseum. Then you'll also receive a guided behind-the-scenes tour of the Australia Zoo Wildlife Hospital. Here you'll see the kind veterinary (兽医的) team treating sick and injured native wildlife, and you'll learn what you can do to protect Australia's native wild animals.

    Every season is different and so is our Zookeeper for a Day Khaki Extreme program! We'll change the animals and activities each school holiday period to keep it exciting, but with so many great animals on offer, the Khaki Extreme program is always a bunch of fun.

    If reptiles (爬行动物) are more your thing, check our Zookeeper for a Day Khaki Extreme Reptile program. Here you'll have a wild day out with some of Australia Zoo's most scaly (有鳞屑的) and slippery friends. This program may not be available every school holiday period and program dates will be limited. Check the booking page for further details on availability.

    www.australiazoo.com.au

    Open daily 9:00 am—5:00 pm

    Bedtime for some of our animals is 4:30 pm.

    Closed Christmas Day