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¡¾ÌâÄ¿¡¿Swiss researchers said Monday they have developed a wireless camera system to monitor vital signs in premature babies, a move that could replace uncomfortable and highly inaccurate skin sensors (´«¸ÐÆ÷) which produce false alarms in up to 90 percent of cases, mainly set off by the baby¡¯s movement.

¡°This is a cause of discomfort for the babies, because we have to check on them every time,¡± said Jean-Claude Fauchere, a doctor at University Hospital Zurich¡¯s newborn clinic.

His hospital is preparing to begin tests of a new, contactless system created by researchers at the EPFL polytechnical university in Lausanne and at the Swiss Center for Electronics and Microtechnology.

The system designed in Switzerland should allow premature babies kept warm in incubators (ºãÎÂÏä) to be medically monitored using highly sensitive cameras that detect the newborn¡¯s pulse by analyzing its skin color, which changes so slightly every time its heart beats.

¡°Breathing is monitored by measuring movements of its chest and shoulders. At night, infrared (ºìÍâÏßµÄ) cameras take over, and monitoring can be carried out non-stop,¡± the statement said.

The visual system was designed by CSEM researchers, who chose cameras sensitive enough to detect minute changes in skin color, while the EPFL researchers designed algorithms (ÔËËã³ÌÐò) to process the data in real time.

¡°We ran an early study on adults, where we looked at a specific part of skin on their foreheads,¡± EPFL doctoral student Sibylle Fallet said. ¡°With our algorithms we can track this area when the person moves, and use tiny changes in their color to determine the pulse,¡± she said. ¡°The tests showed that the cameras produced practically the same results as conventional sensors.¡±

Once the system has been widely tested on premature babies, it could one day replace skin sensors altogether, the schools said.

¡¾1¡¿What is the advantage of the wireless camera system?

A. It is light and painless. B. It is mobile and effective.

C. It is cheap and convenient. D. It is comfortable and accurate.

¡¾2¡¿What is the key for the wireless camera to monitor a premature baby?

A. Its non-stop measurement.

B. Good condition of incubators.

C. Its sensitivity to sense skin color change.

D. The algorithms to process the data in time.

¡¾3¡¿It be inferred from what Sibylle Fallet said that .

A. their early study on adults was successful

B. the system has been used on premature babies

C. the visual system can sense the people¡¯s pulse

D. the wireless cameras will replace conventional sensors

¡¾4¡¿What¡¯s the schools¡¯ attitude towards the visual system?

A. Doubtful. B. Optimistic. C. Unconcerned. D. Uncertain.

¡¾´ð°¸¡¿

¡¾1¡¿D

¡¾2¡¿C

¡¾3¡¿A

¡¾4¡¿B

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What makes the sea tum red and causes thousands of fish to die£¿As far back as anyone could remember£¬the blame was placed on the "red tides. " In 1947£¬scientists finally connected the red tides with a microscopic sea organism£¨ÓлúÌ壩¡¾1¡¿£¨call£©the dinoflagellate.

The dinoflagellate is so tiny ¡¾2¡¿ 6£¬000 of these organisms may be contained in ¡¾3¡¿ single drop of water. It stands on the borderline between plant and animal in its clasification. it produces its own food£¬as plants do. But it moves ¡¾4¡¿£¨free£©and eats other organisms£¬as animals do.

Dinoflagellates are normally only one of the many kinds of organisms found in plankton. Plankton is the name given to all very small ¡¾5¡¿£¨form£©of sea life. However£¬when the air and water ¡¾6¡¿£¨be£©calm and warm£¬dinoflagellates multiply with ¡¾7¡¿£¨amaze£©sped. The surface of the water appears ¡¾8¡¿£¨cover£©with a red carpet.

The dinoflagellates give off a poison. Many fish die. Their bodies are washed up on the beach. Beaches are not fit ¡¾9¡¿ any use. Fish that are not killed may become ¡¾10¡¿£¨poison£©to animals or people who eat them. Commercial fishing comes to a stop.

As dinoflagellates consume all the food and oxygen in an area£¬they die. After a time£¬the sea returns to normal. But when conditions are right£¬the red tide comes again.

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