The sound of a mosquito can mean trouble in many parts of the world. The bite of the mosquito can be deadly. The insects carry serious diseases like malaria (疟疾). It is estimated that almost 630,000 people died from malaria and malaria­related causes in 2012, and most of these cases were in African countries.

    In the United States, a group of California scientists are working to develop a more effective and less costly substance (物质) to protect people from mosquitoes. The researchers are investigating the sense of smell in mosquitoes. They found the insects use the same receptor for identifying carbon dioxide in human breath as they do for the smell of our skin. Anandasankar Ray, who is leading the investigation, says scientists tested more than a million chemical compounds (化合物) until they found a substance called Ethyl Pyruvate. He says Ethyl Pyruvate makes the mosquitoes' receptors inactive. “When we apply Ethyl Pyruvate to a human arm and offer it to hungry mosquitoes in a cage, very few of the mosquitoes are attracted to the human arm because only a few of them are able to smell it out,” said Ray.

    Genevieve Tauxe, a member of the research team, says it was not easy to find the neurons (神经元) of noble cells that recognize both the smell of human breath and skin. “With the device used to examine the mosquito, we are able to insert a very small electrode (电极) into the part of the mosquito's nose, where its smelling neurons are and where the smell is happening,” said Tauxe.

    Anandasankar Ray says a product based on Ethyl Pyruvate may cost less to produce than DEFT, the most effective chemical treatment now in use. He says DEFT is too costly for most people who live in areas affected by malaria.

    “Perhaps by finding smells that can attack other target receptors, we will be able to improve upon DEFT and finally have the next generation of insect behaviour control products,” said Ray.

    Electronic sensors built into paper could be used in a range of ways from information storage to touch screens and more.

    Electronic sensors built into cartons（纸盒）may make it easier to tell when it's time to throw out rotten milk or orange juice. And that's just the start. At least that's the goal for researchers working on putting electronics into paper. They're trying to figure out how to combine the flexibility, low-cost and recyclability of paper with the information-carrying ability of electronics.

Daniel Torbjork, a physics graduate student in Finland, has been working on the problem. He's published a review of the field in the journal Advanced Materials.

    Much research has been focused in this area. While most electronic applications require patterned conducting structures, conductive paper could be used in applications such as energy storage devices, sensors, electric heaters and others, according to Torbjork.

     “You could even have some interactive functions in magazines,” Torbjork said, “You could put a simple game in a package. If you want a touch screen, press a button and then something happen. Sensors in paper could tell us when something has gone bad.”

    Additional applications, such as information storage and security paper, have been suggested for magnetic papers containing magnetite. In Massachusetts, researchers have figured out how to post a video of such a device put into a paper airplane.

    German researchers have also put electronic chips in paper bank notes to defend counter-feiters（造伪币者）. Paper is a good material but printing electronics also requires low-cost manufacturing. As many US and European paper makers lose market share to cheaper paper from China, these big paper companies are looking for added value products. That's where electronic paper devices could make a difference.

    “The major obstacles are paper's large surface roughness and chemical impurities.” Torbjork says. But others in the field think that electronic sensors in paper are still far from the consumer marketplace.

    “I don't think it's going to happen.” said Roy Horgan. “You need a conductive surface. It could be 10 years out. What we are looking for are solutions that you can commercialize to­day.”

    Solar Print is partnering with Italian automaker Fiat to develop a unique auto-glass with tiny photostatic cells（光电）that can capture electricity from the sun. In the meantime, using paper to conduct electricity is still a “blue-sky” project.

    “I would love to see someone prove me wrong, because that means that it's actually happening.” Horgan said. “If someone comes up with conductive paper, then that's a very interesting technology.”

    I was never very neat, while my roommate Kate was extremely organized. Each of her objects had its place, but mine always hid somewhere. She even labeled(贴标签) everything. I always looked for everything. Over time, Kate got neater and I got messier. She would push my dirty clothing over, and I would lay my books on her tidy desk. We both got tired of each other.

    War broke out one evening. Kate came into the room. Soon, I heard her screaming. “Take your shoes away! Why under my bed!” Deafened, I saw my shoes flying at me. I jumped to my feet and started yelling. She yelled back louder.

    The room was filled with anger. We could not have stayed together for a single minute but for a phone call. Kate answered it. From her end of the conversation, I could tell right away her grandma was seriously ill. When she hung up, she quickly crawled(爬under her covers, sobbing. Obviously, that was something she should not go through alone. All of a sudden, a warm feeling of sympathy rose up in my heart.

    Slowly, I collected the pencils, took back the books, made my bed, cleaned the socks and swept the floor, even on her side. I got so into my work that I even didn't notice Kate had sat up. She was watching, her tears dried and her expression one of disbelief. Then, she reached out her hands to grasp mine. I looked up into her eyes. She smiled at me, “Thanks.”

    Kate and I stayed roommates for the rest of the year. We didn't always agree, but we learned the key to living together: giving in, cleaning up and holding on.

    Maui, one of the most beautiful islands in the world, is a dream place for a visit and there are so many attractions for you.

    HALEAKALA

    Mt. Haleakala is 10,023 feet high and is one of the two volcanoes that created this incredible Hawaiian island. Haleakala National Park offers a variety of activities, making it one of the most revisited attractions in all the Hawaiian Islands. The most popular activities include enjoying sunrise and sunset, hiking, and backcountry camping on Maui.

    ROAD TO HANA

    There are many ways to experience the Road to Hana, and the sleepy coastal Town of Hana, Maui. Visitors can go by group and private tours, or explore on their own by renting a vehicle. Beginning at the historic Town of Paia, visitors can enjoy decorated coastlines all the way to Hana, world-famous beaches in Hawaii, tropical landscapes, waterfal.ls, scenic lookout points, and cultural attractions that mark significant points in Maui's unique Hawaiian history.

    HO'OKIPA BEACH PARK

    Ho'okipa Beach Park is one of the most famous beaches in the world for professional surfing and windsurfing. In the ancient Hawaiian language, “ho'okipa” means hospitality, which is exactly what this Beach Park offers! At Ho'okipa, visitors can see the powerful coastline from the top parking lot for amazing photo opportunities. Or you can go to the sand for afternoon BBQ's and the glorious Maui sunshine.

    OHE'O GULCH POOLS

    The Ohe'o Gulch Pools, more commonly referred to as the Seven Sacred Pools, is a wonderful place to explore Maui on vacation. The lower pools are more easily accessed, and perhaps the best choice for visitors who want to jump in. Due to the popularity of the Seven Sacred Pools, it is highly suggested to arrive early for a chance to enjoy privacy in this beautiful location.

    I passed a man on the way home from work this evening. He was walking down the side of the carriageway. Actually, he was walking unsteadily. I slowed down wondering whether to stop and give him a lift, at least down to a safer part of the road. I couldn't be sure but he appeared to be quite drunk. I pulled over and watched him in my rear-view mirror. He was obviously well-oiled. A truck turned sharply to avoid him at one point-he didn't appear to care.

    Having stopped now, I thought I might as well wait for him to reach the car. Five minutes went by and he reached the car. My windows were down, and I asked him if he wanted a lift. He indicated that he was going to the next town, just out of my way, but not far enough to put me to trouble. So in he got.

    “Sorry, I'm really quite drunk. I've been at a funeral. My family are all really out of it, so I decided to walk home. I'm Ryan,” and he offered me his hand. I drove and we talked. He told me he'd buried his uncle, and that he was a traveler.

    He called me brother and offered me his cool shades as payment. I declined and said the joy was in the giving. Three times along the way he told me that, “Whatever we put out there comes back to us. Something good will come to you for picking me up.” We told each other where we came from, the places we've lived, and how we both ended up here. He apologized again for being so drunk. “Anywhere around here is fine for me,” he said. So I dropped him at the next junction. We shook hands and spoke each other's names again.

    I felt as if I'd been blessed somehow. I think I have been.

    Here we introduce some rental houses to you.

    Apartment Levant in Komiza

    Overlooking one of the most beautiful fishing villages in Croatia, our two storey house also gives you a full view of Komiza bay as well as neighboring island of Bisevo. The apartment has a wide, covered balcony and a small garden with lemon trees. It is only 10 minutes'walk from the centre of the village, although it is on the edge of the village, with forests behind the house.

    Apartment Domina

    Located in the centre of the city, the apartment is protected as a historical site. All other facilities are at your fingertips such as restaurants, shops and museums. The apartment is fully equipped and air—conditioned, having a kitchen with a dishwasher, a satellite TV and the free Web access. It contains a bedroom with a double bed and antique furniture. Besides, the apartment offers pet-friendly accommodation.

    Apartment Tonka

    The apartment is located in an old stone house in the centre of Komiza. It offers two bedrooms, each with a separate bathroom, and a living room with a furnished kitchen. The house is only a couple of minutes away from the old harbor, along the old town's street where you can enjoy Komiza's rich cultural history. The bus stop is less than 200 meters away, near the fruit and vegetable market.

    Pearl of Issa

    This two-bedroom apartment is only a few minutes'walk from beautiful beaches, shops, restaurants, cafés and bars. It consists of two bedrooms, a fully equipped modern kitchen, a dining room and a resting area with a sofa, which can be used as an extra sleeping place for one person, a bathroom and a balcony with comfortable garden furniture and barbecue equipment.