If you're encouraged by the tiny house movement and think 160 square feet is just enough for your needs, you may want to contact the Academy of Construction and Design (ACAD) at IDEA Public Charter School in northeast Washington.

    Students in the program built a micro house with a kitchen, a bathroom, a sleeping loft with space for a queen-size bed and a storage loft, all set on a trailer for mobility. The exterior of the house was part of a continuous living exhibit in 2015 and was moved to the IDEA campus so students could work with builders to complete the interior earlier this year.

    McMahon said the D. C. government's approval to push companies to hire District residents was at odds with the school system not preparing students for careers in construction, exploring or electrical work. McMahon gathered industry and community leaders to establish ACAD in 2005, and he said 100 percent of the companies he contacted responded positively to the idea, including major firms such as JBG, Clark Construction, Hines Construction and Boston Properties.

    “When students make the connection between what they are learning a potential career, their academics improve dramatically,” said Carol Randolph, chief operating officer of the D. C. Students Construction Trades Foundation. “Some of them who didn't think college was an option now have a better chance because their classes have become relevant to a job.”

    “We teach them life skills and explain that even if you start as a laborer, there are opportunities to move up quickly,” he said. “We rewrite the story for them and explain that they can work for a few years, make good money, get promoted, and start their own business or go to school with less debts.”

    “Parents and school advisor can be the biggest obstacles because of the negative idea of construction as a blue-collar career,” Karriem said. “I get middle-school advisor on board to talk about the opportunities this education provides. These kids are learning lifelong skills that can help them in other fields, provide them with income and allow them to take care of their homes.”

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    You might make a disgusted face when you notice that the person waiting in their car at the red light next to you is picking their nose,but admit it,you do it too.And while it might be the natural option when there isn't a box of tissues around,it can be bad for you.The main reasons people feel the need to pick their nose is to clear it of dried liquid,stop an itch（痒）,or just because it feels good.Boogers（鼻屎）form when dried liquid and cilia,the tiny hairs that line the nostrils（鼻孔）,trap the dust,dirt,and other things.When boogers build up in your nose,it can be uncomfortable,and sometimes just blowing into a tissue doesn't do the trick.

    Otolaryngologist Erich P.Voigt, MD ,told Business Insider that picking your nose can cause injuries and bleeding within your nostrils.That's not terribly damaging,but when the bacteria from your hands get into your body,it can cause a cold and flu.So doctors strongly suggest not picking the nose.

    If dry winter air is causing the dirty liquid to harden in your nostrils,making you want to pick,consider damping the air at home,or taking a steam shower to soften things up in there.

    Children, who are most famous for having a finger up their nose,sometimes don't realize how much injury they're causing,and sometimes it.can lead to nose bleeds.

    So, next time you go to pick your nose,think about how many bacteria are on your hands and in your boogers, and maybe reach for a tissue instead.Even if you 're alone,and not waiting for the light to turn green,please,use a tissue.

    People have been acting like people-in other words, they've been making tools, creating ceremonies, and sharing food—for a long time. That's the conclusion of a recent study from South Africa's southern coast.

    There, in a cave lying above the sea, researchers from Arizona State University have found evidence that humans were behaving in surprisingly complex ways as early as 164,000 years ago. Our species. Homo sapiens, appeared an estimated 200,000 years ago.

    The cave held three important evidences about the behavior of these Stone Age people.

    First, the researchers found the remains of all kinds of shellfish. The people who lived in the cave probably collected these creatures from rocky shores and tide pools and brought them to the cave to eat.

    The researchers consider the early Africans move to the South African coast between 195,000 and 130,000 years ago. Around that time, the climate inland turned relatively cold and dry. Therefore, there were fewer plants and animals to eat away from the coast.

    When these ancient people moved to the coast, they probably experienced a major cultural shift, the researchers suspect. That's because observations of modem hunter-gatherer societies suggest that men are more likely to hunt for big animals when people live inland. On the coast, women play a more important role in providing food by gathering plants and shellfish.

    As for the second clue, the researchers unearthed 57 pieces of reddish pigment (颜料). The researchers think that the cave habitants used the paint for coloring their bodies or for other ceremonies. Symbolic behavior is a clearly human feature.

    Finally, the search discovered over 1,800 stone tools, including well crafted blades (刀片). These blades came in various sizes. The smallest were just less than a half inch wide. Ancient people may have attached these blades to the end of a stick to make spears or other tools.

    We walked in so quietly that the nurse at the desk didn't even lift her eyes from the book. Mum pointed at a big chair by the door and I knew she wanted me to sit down. Then, Mum took off her hat and coat and gave them to me to hold. She walked quietly to the small room by the lift and took out a wet mop. She pushed the mop past the desk and as the nurse looked up, Mum nodded and said, “Very dirty floors.” The nurse answered. She looked at Mum strangely and said, “But aren't you working late?”

    Mum just pushed harder, each swipe of the mop taking her farther and farther down the hall. I watched until she was out of sight and the nurse had turned back to writing in the big book. After a long time Mum came back. Her eyes were shining.

She quickly put the mop back and took my hand. As we turned to go out of the door, Mum bowed politely to the nurse and said, “Thank you.”

    Outside, Mum told me, “Grandma is fine. No fever.”

    “You saw her, Mum?”

    “Of course. I told her about the hospital rules, and she will not expect us until tomorrow. Dad will stop worrying as well. It's a fine hospital. But such floors! A mop is not good. You need a brush.”

Eco-Resort Management

    Ecotourism is often regarded as a form of nature-based tourism and has become an important alternative source of tourists. In addition to providing the traditional resort-leisure product, it has been argued that ecotourism resort(度假村) management should have a particular focus on best-practice environmental management. Couran Cove Resort is such a tourist attraction located on South Stradbroke Island, Australia.

    Sustainable(可持续的) Practices of Couran Cove Resort

    South Stradbroke Island is separated from the mainland by the Broadwater, which is home to a wide range of plant communities. Located on the offshore island, the Resort is only accessible by means of water transportation. It provides hourly ferry service from the harbour on the mainland to and from the island. Within the Resort, transport modes include walking trails, bicycle tracks and the beach train. The reception area is the counter of the shop which has not changed in 8 years at least. The accommodation is an octagonal(八角形的) building. These are large rooms that are clean but the equipment is old and in some cases just working. The ceiling fan only works at high speed for example. Beds are hard but clean. There is a television, a radio, an old air conditioner and a small fridge in each room.

    As an ecotourism-based resort, most of the planning and development of the attraction has been concentrated on the need to co-exist with the natural environment of South Stradbroke Island to achieve sustainable development.

Water and Energy Management

    There is groundwater at the centre of the island, which has a maximum height of 3 metres above sea level. The water supply is recharged by rainfall and is commonly known as an freshwater aquifer(含水层). Couran Cove Island Resort obtains its water supply by tapping into this aquifer and collecting it through a pipe. In order to narrow the water uses, all laundry activities are carried out on the mainland. The Resort uses LPG power station rather than a fuel oil station for its energy supply, supplemented(补充) by wind power, which has reduced greenhouse emissions by 70%. Hot water in the eco-cabins and for some of the Resort's vehicles is solar-powered. Water efficient fittings are also installed in showers and toilets. Visitors who stay at the Resort are encouraged to monitor their water and energy usage by an in-house television system, and are rewarded with prizes (such as a free return trip to the Resort) accordingly if their usage level is low.

    Evaluation

    In three years of operation, Couran Cove Island Resort has won 23 international and national awards. It has effectively implemented contemporary environmental management practices. However, the Resort's growth will eventually be limited by its carrying capacity, and quantity control should be incorporated in the management strategy of the Resort.

    Robots are now being employed not just for dangerous tasks, such as discovering mines or rescuing people in disasters. They are also finding application as household helps and as nursing assistants. As increasing numbers of machines, equipped with the latest artificial intelligence, take on a growing variety of specialized and everyday tasks, the question of how people see them and behave towards them becomes ever more urgent.

    A team led by Sari Nijssen of Radboud University and Markus Paulus, Professor of Developmental Psychology at Ludwig-Maximilians-Universitaet (LMU), have carried out a study to determine the degree to which people show concern for robots and behave towards them based on moral principles.

    According to Sari Nijssen, the study set out to answer the following question:" Under what circumstances would adults be willing to sacrifice robots to save human lives?" The participants were faced with a hypothetical (假设的) moral dilemma: Would they be prepared to put a single person at risk in order to save a group of injured persons? In the situations presented the intended victim was either a human, a humanoid robot that had been humanized (人性化的) to various degrees or a robot that was clearly recognizable as a machine.

    The study suggested that the more the robot was humanized, the less likely participants were to sacrifice it. Situations that included vivid stories in which the robot was described as a merciful being or as a creature with its own understandings, experiences and thoughts, were more likely to stop the study participants from sacrificing it in the interests of anonymous (无名的) humans.

    "This result indicates that our study group attached a certain moral status to the robot," says Paulus. "One possible suggestion of this finding is that attempts to humanize robots should not go too far. Such efforts could come into conflict with their intended function—to be of help to us."