Upside Down in a Spoon

You will need:shiny soup spoon orserving spoonHow can a spoon turn you upside down? Thisexperiment is great fun for younger children you have toentertain.What to do: The scoop of a spoon makes aninteresting mirror. Just be sure the spoon you use is shinya…     

长时间待在教室更容易近视（英文）

正The more years you spend in full-time education, the more short-sighted you are likely to be, according to a large UK study.The link appears to be that students have too little exposure to bright natural light—and the antidote suggested by the researchers is for children to spend more of the day outdoors.The study, carried out by Cardiff and Bristol university scientists, analysed information on the genetics, eyesight and educational background of68 000 participants in the UK Biobank database.     

Loop-the-Loop

You will need:rope, 24 inches (60cm)longpailsoft rubber ballWhen you are on a loop-the-loop, and it turns upside down,why don't you fall out?What to do: Tie the rope securely to the handleof the pail. Put the ball into the pail.Choose a spot where there is no risk ofhitting anything ——outdoors if possible. Holdthe pail by the rope and whirl the pail in circlesin the air as fast as you can.What happens: The ball remains in the paileven when it turns upside down.Why: Centrifugal force —— …     

What do you know about honey water ?

<正>蜂蜜水大家都知道,但是你知道,为什么大家爱喝蜂蜜水吗?蜂蜜水对人有哪些好处呢?Read on and let me tell you the wonders of honey and warm water.1.Watch Your Weight Melt Away Yes,drinking water and honey can help you lose weight.Get the thoughts about the sugar aspect of honey out of your head,as that is one of its benefi ts.The sugar in honey is a natural sugar which provides a healthy source of calories.     

A New Mechanism to Curb Over-reactive Immune Responses

The human immune system is a truly amazing constellation of responses to attacks from the outside. It could defend you against millions of bacteria, microbes, viruses, toxins and parasites that would invade your body. However, there are cases where the immune response to innocuous substances is inappropriate and over-reactive, leading to diseases such as allergies and arthritis.     

Odors Warps Visual Time Perception

正The brain is not a timepiece.Though it is equipped with senses like vision,audition,touch,smell,and taste,it has no direct access to or measure of the physical time(unless you read from a clock).Rather,it constructs the subjective"time"of an event from the dynamic multisensory inputs associated     

A Morc Global Strategy for IAU： Boosting Astronomical Rescarch and Education in Developing Countries--An Interview with New IAU President Norio Kaifu

Q: Congratulations to you for becoming the new IAU president! What are the main objectives of the IAU in the coming three years? President Kaifu: The objective of the IAU is to promote astronomy in al...     

Lacanian Reinterpretation of Charlotte Perkins Gilman's The Yellow Wallpaper based on Theories of “Mirror Stage” and “Three Orders”

The Yellow Wallpaper was a representative work of feminist literature by Charlotte Perkins Gilman.In the novel,the heroine under great repression gradually awakes to seek self identification and revolt against the patriarchy.Many researchers have conducted studies from perspectives of feminism,image,theme and structure of the novel.This paper aims to employ Lacan’s"mirror stage"theory and"three orders"theory to analyze the story.Through observing the image of the"confined woman"in the"mirror"(the yellow wallpaper),her awareness of"selfhood"is gradually awakened:she lives in the Symbolic Order where the patriarchy has imposed many restrictions on her.Unable to live in such a world,while the Real is also incomprehensible,what she could do is to totally immerse herself in the Imaginary Order.That’s why she is creeping like a child.     

Symbolism in the Scarlet Letter

I. Different Meanings of the Scarlet Letter "A"1.1 The Changes of the Symbolic Meaning of the ScarletLetter “A”.In this novel, the scarlet letter "A" changes its meaningmany different times. This change is significant. It shows growthin the characters, and the community in which they live. Theletter "A" begins as a symbol of sin. It then becomes a symbolof alone and alienation, and finally it becomes a symbol of able,angel and admirable.1.1.1 AdulteryThe letter "A", worn on Hester's …     

A STUDY ON THE WRITING PROCESS

The objective of this paper is to help the students become good writers by guiding them through the process of writing, such as generating ideas, drafting, and revising. The ability to write well will help students provide answers in examinations and write project reports and academic essays which will be understood easily and appreciated by the teachers. Writing well is also an asset at the work place, where you may be writing memos, e-mail messages, reports, or proposals to various types of readers. Therefore, it is crucial for the students to be coached in the use of the writing process. In this paper, we will analyze the complete writing process by dividing it into three stages: planning, writing, and finalizing. Within each of these stages, there are a few steps.     

A New Mechanism to Curb Over-reactive Immune Responses

The human immune system is a truly amazing constel- lation of responses to at- tacks from the outside. It could de- fend you against millions of bacteria, microbes, viruses, toxins and parasites that would invade your body. However, there are cases where …     

Scientific communication,competition, and collaboration

<正>The late molecular biologist Gunther Stent once asked:‘If you were given all the sources you want to pursue your scientiic interest,but not allowed to talk to any other scientist,would you still do science?’he answer from many of us is probably no.Science is a community afair,and much of the joy in doing science comes from communicating with other scientists,who appreciate your work and contribute to it in various ways.Communication oten leads to collaboration that eventually results in scientiic accomplishment not atainable by working alone.Yet,intense competition in many areas has a negative impact on scientiic communication,and overemphasis by our institutions on     

China Sets up One of the World’s Most Powerful Ground-based Systems for Space Weather Monitoring

The Meridian Space Weather Monitoring Project (or the Chinese Meridian Project) is the first major scientific infrastructure China has ever built in the field of space science to understand and predict near-Earth space environment variations. It started construction in early 2008 and became fully operational in October 2012. In this issue of BCAS, we will present you with the latest development and major scientific facts of this remarkable project.     

the Voice of Tomorrow

Have you heard Mide? Coule be.Mike is a professional reader,and he‘s everywhere these days. On MapQuest, the Web-based map service,he‘ll read aloud whatever directions you ask for. If you like to have AOL or Yahoo! e-mail read aloud to you over the phone, that‘s Mike‘s voice you ‘re hearing. Soon     

Controlling complex,non-linear dynamical networks

<正>INTRODUCTION An outstanding problem in the ield of complex dynamical systems is to control non-linear dynamics on complex networks.Indeed,the physical world in which we live is non-linear,and complex networks are ubiquitous in a variety of natural,social,economical,and man-made systems.Dynamical processes     

Controlling complex,non-linear dynamical networks

<正>INTRODUCTION An outstanding problem in the ield of complex dynamical systems is to control non-linear dynamics on complex networks.Indeed,the physical world in which we live is non-linear,and complex networks are ubiquitous in a variety of natural,social,economical,and man-made systems.Dynamical processes     

青少年的友谊

“Friendship relates to wider issues of status and stratification； whom you mix and associate with serves to locate you within a status hierarchy, in the process conveying images of character and social worth” (Allan, 1989: 62) In Wellman‘s view, in the First World friendship is used mainly to meet either sociable and emotional needs; in the Second World it is used to short-circuit bureaucracy, while in the Third World it is for basic survival.     

Rockets in the Sky

What is the sky? Where is it? How high is it? What lies above the sky? I am sure that you have asked questions like these. They are very difficult to answer, aren't they?Perhaps we can answer some of these questions now. What is the sky? It is vast space. In the sky there is the sun, the moon, and all the stars.Scientists have always wanted to know more about space. They use telescopes to obtain information. But this     

Design of CMOS Mixer with Complementary Transconductance

<正>A current bleeding CMOS mixer with complementary transconductance stage is presented in this paper.The conversion gain of the mixer is increased and the flick noise of the mixer is reduced by inserting the PMOS to form current bleeding circuit in Gilbert mixer.The circuit is designed through SMIC 0.18um CMOS process,the LO frequency is 1.571GHz,RF frequency is 1.575GHz,simulation results show the conversion gain of the mixer is 18.5 dB,SSB NF is about 9.59dB,and third-order input intercept point(IIP3) is-4.6dBm.The mixer consumes 7.8 mA at 1.8 V power supply and the size of the whole layout is 0.73mm×0.68 mm.     

爱之英语

It hurts to love someone and not be loved in return.But what is more painful is to love someone and never find the courage to let that person know how you feel.