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時間:2022-08-18 來源:本站 點擊:258次
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西安市中小学校寒假时间出炉 还剩2个多月就放寒假了!******

  华商报记者掌握到,现阶段,西安中小学校寒假时间早已明确:

  中小学将从2022年1月17日(星期一)起放寒假,普通高中将从2022年1月24日(星期一)起放寒假。

  2022年春季开学2月15日(星期二)签到,2月16日(星期三)宣布授课。

  华商报记者 付启梦。


来源于:华商网-华商报。

编写:报刊社方方正正。

狗狗的歪头杀不只是卖萌,还是聪明的表现******

狗狗的歪头杀总能萌倒人类,但这动作究竟意味着什么?现在,终于有科学家对此展开研究了,他们的初步发现是:聪明的狗狗更爱歪头,还总是往同一个方向歪。

The adorable head tilt some dogs do is a sign they're concentrating and recalling information, a study found

Sometimes, when we talk to our canine companions, they tilt their heads adorably to one side.

有时,当我们与狗狗交谈时,它们会可爱地向一侧歪头。

Although a dog's quizzical head cock might suggest incredulity or confusion, the gesture could actually be a sign of concentration and increased attention, according to a study published last week.

根据上周发表的一项研究,虽然狗狗的歪头杀可能表明怀疑或困惑,但这个姿势实际上可能是注意力集中和注意力增强的标志。

Researchers investigated how well 40 dogs of various breeds could memorize the names for different toys, then recall that information in order to retrieve specific toys in response to their owners' commands. Most of the pups weren't able to learn the toy names, but seven border collies showed remarkable aptitude for the task.

研究人员调查了 40 只不同品种的狗狗记住不同玩具名称的能力,然后回忆这些信息以便根据主人的命令检索特定玩具。大多数幼犬无法记住玩具名称,但七只边境牧羊犬表现出了非凡的能力。

The scientists deemed that group "gifted word learners," and found that the seven collies had something in common: They all tilted their heads far more frequently than their non-gifted counterparts after hearing a command.

科学家们认为这些狗狗是“有天赋的词汇学习者”,并发现这七只边牧有一个共同点:在听到命令后,它们都比没有天赋的同类更频繁地歪头。

The data showed that the gifted learners tilted their heads 43% of the time, while the other 33 dogs did the gesture just 2% of the time.

数据显示,有天赋的狗狗有 43% 的时间会歪头,而其他 33 只狗狗只有 2% 的时间会做出这种姿势。

"It seems that there is a relationship between success in retrieving a named toy and frequent head tilts upon hearing its name," Shany Dror, an animal cognition researcher at Eötvös Loránd University in Hungary who co-authored the study, said in a press release. "That is why we suggest an association between head-tilting and processing relevant and meaningful stimuli."

“似乎成功地根据玩具名称找到玩具与听到玩具名字时歪头之间存在联系。”该研究的合作者、匈牙利埃特沃斯洛兰大学的动物认知研究员 Shany Dror 在一份新闻稿中说,“这就是为什么我们建议将歪头与处理相关且有意义的刺激之间联系起来。”

This is the first study to examine head-tilting behavior in dogs, according to the study authors.

据研究者称,这是第一项对狗狗歪头行为的研究。

In the first of three experiments described in the study, the researchers asked 40 dog owners to test their pets once a month for three months. Each owner taught their dog the names of two toys, then asked the animal to fetch one from an adjacent room. The toys remained the same throughout the three months.

该研究进行了三个实验,在第一个实验中,研究人员要求 40 名狗主人在三个月内每月测试一次他们的宠物。每个主人都教他们的狗狗两个玩具的名字,然后让动物从相邻的房间拿一个。玩具在三个月内保持不变。

Only the seven collies that were able to learn the toys' names (the gifted learners) were included in the next experiment, though one died before it began. In that second experiment, owners tested the six remaining dogs in the same way over three months, but with up to 13 toys.

只有七只能够学会玩具名字的边牧(有天赋的学习者)被纳入下一个实验,尽管其中一只在实验开始之前就死了。在第二个实验中,主人在三个月内以同样的方式测试了剩下的六只狗,但最多不超过13 个玩具。

One of the collies, Whisky, brought the correct toy back 54 out of 59 times. Two others were successful more than 90% of the time. The other three had success rates of between 57% and 75%.

其中一只叫做威士忌的边牧,在 59 次实验中带回了 54 次正确的玩具。另外两个的成功率超过 90%。其他三个的成功率在 57% 到 75% 之间。

Then in a third experiment, the six gifted pups showed they could learn 12 new toy names in one week, then remember those names for at least two months.

在第三个实验中,六只有天赋的幼崽表明他们可以在一周内学习 12 个新的玩具名称,然后记住这些名称至少两个月。

"We know that dogs can easily learn words that are linked to actions, such as 'sit' or 'down.' But very few dogs can learn names of objects," Dror said.

“我们知道狗可以轻松地学习与动作相关的单词,例如‘坐’或‘坐下’。但是很少有狗可以学习物体的名称,” Dror 说。

Only the gifted dogs who performed well at the toy retrieval tasks consistently tilted their heads after hearing a verbal command. That led Dror's team to conclude that the gesture is related to collies' attempts to parse out the meaning of a word. The tilt could indicate that the collies are mentally matching a toy name that they hear to a visual image stored in their memories.

只有在玩具检索任务中表现出色的天才狗在听到口头命令后才会一直歪着头。这使得Dror 的团队得出结论,这个姿势与牧羊犬试图解析单词含义有关。这种歪头可能表明牧羊犬在心理上将他们听到的玩具名称与存储在他们记忆中的视觉图像相匹配。

Similar to the way humans are right or left handed, the gifted collies, too, tended to cock their heads to just one side or the other. Their favored side stayed the same across the three experiments, and the position of the dogs' owners in front of them did not influence the direction of the tilt.

与人类惯用右手或左手写字的方式类似,天才牧羊犬也倾向于将头偏向一侧或另一侧。它们偏爱的歪头方向在三个实验中保持不变,并且狗主人在他们面前的位置不会影响歪头的方向。

"If a dog was a left tilter, it would stay a left tilter," Andrea Sommese, Dror's co-author and colleague, told Science.

“如果一只狗喜欢向左歪头,它就会一直向左歪头,” Dror 的合作者兼同事 Andrea Sommese 告诉《科学》杂志。

To the researchers, that consistency may be additional evidence that dogs tilt their heads when paying close attention to a task.

对研究人员来说,这种一致性可能是狗在密切关注一项任务时会倾斜头部的额外证据。

Although the study only looked at gifted border collies, the authors suggested that a talent for learning and remembering object names is not unique to that breed.

尽管该研究仅针对有天赋的边境牧羊犬,但作者认为学习和记住物体名称的才能并非该品种独有。

Dror said her group has also observed the skill in a German Shepherd, a Pekingese, and a mini Australian Shepherd. A study from earlier this year also identified a Yorkshire Terrier that rivaled Whisky's success.

Dror 说,她的小组还在德国牧羊犬、北京犬和迷你澳大利亚牧羊犬身上观察到了这种技能。今年早些时候的一项研究还确定了一种可以与威士忌相媲美的约克夏犬。

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Stoch feels pressure to take medal in Beijing 2022******

WARSAW, Sept. 27 (Xinhua) -- Three-time Olympic ski jumping champion Kamil Stoch emphasized that it is very important for him to prepare well for the 2022 Olympic Winter Games in Beijing.

The 34-year-old is considered as a strong favorite to stand on the podium during the Olympic competition.

"The last two years were crazy, so I am fully focused on the present. It is really important for me to prepare well for the Winter Olympics. It will be a good experience to take part in that event," Stoch claimed.

If Stoch wins in Beijing, he will become the second Polish athlete to take four Olympic golds after racewalker Robert Korzeniowski.

"I had such a thought, but thinking about the results causes stress and makes you want too much. It doesn't help you on the hill. My goal is just to show good quality. I treat the Winter Olympics as a stage of the season," the ski jumper explained.

"I feel a lot of pressure on my shoulders because I achieved success. However, I give everything I have and I just do my best. I have already learned how to handle this kind of pressure and the expectations," the world champion from Val di Fiemme added.

The competition in Beijing could be the last Olympics for Stoch, but he emphasized that if he fails, it will not be the end of the world for him.

"You always have to have a plan B when your results are not as good as you expected. What is more, the Olympic season does not have to be the last in my career," he concluded. Enditem

First pig heart transplant patient dies after 2 months******

AFP

This handout photo released by the University of Maryland School of Medicine on January 10 shows surgeon Dr Bartley Griffith (left) with patient David Bennett, who received a heart implant from a genetically modified pig, in Baltimore, Maryland.

The first person to receive a heart transplant from a genetically modified pig has died two months after the medical milestone, the hospital that carried out the surgery said on Wednesday.

The procedure raised hopes that advances in cross-species organ donation could one day solve the chronic shortage of human organs available for donation, and the team behind the operation say they are "optimistic" about its future success.

David Bennett, 57, had received his transplant on January 7 and passed away on March 8, the University of Maryland Medical System said in a statement.

"There was no obvious cause identified at the time of his death," a hospital spokesman told AFP, adding that physicians were carrying out a review that would be published in a scientific journal.

Muhammad Mohiuddin, director of the university's cardiac xenotransplantation program, did, however, say in a video statement that Bennett was having "infectious episodes."

"We were having difficulty maintaining a balance between his immunosuppression and controlling his infection," he said.

Bennett's condition began deteriorating several days ago. After it became clear that he would not recover, he was given compassionate palliative care. He was able to communicate with his family during his final hours, a hospital statement said.

Following surgery, the transplanted heart had performed very well for several weeks without any signs of rejection, the hospital added.

Bennett was able to spend time with family, participated in physical therapy, watched the Super Bowl and spoke often about wanting to go home to see his dog Lucky.

Bennett came to the hospital in the eastern US state of Maryland in October 2021.

He was bed-ridden and placed on an emergency life support machine. He had been deemed ineligible for human transplant – a decision that is often taken when the recipient has very poor underlying health.

Mohiuddin said that the team had "gained invaluable insights" from the experience, adding: "We remain optimistic and plan on continuing our work in future clinical trials."

Reporting in US media also revealed Bennett was convicted of stabbing a man several times in 1988, leaving the victim paralyzed and wheelchair-bound before he died in 2005.

Medical ethicists hold that a person's past criminal history should have no bearing on their future treatment.

公务员最近真的降薪了吗,聊聊我所了解的情况

1.萨利:夸西想要更多上场时间,所以他选择加盟塞维利亚

2.拜登签署《降低通胀法案》 哪些人将受益?

3.荷兰士兵自曝2007年可能射杀阿富汗平民

4.为了脱单,我在交友软件上看尽了奇葩

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