旅行中的完美时刻

When was the last time you experienced a perfect moment? You know,the kind of moment when everything is in sync and where a certain clarity surrounds the scene, setting it apart from the rest of the world.     

教授和企业家:一个技术转让的事例研究

1 丹特克(Dantec)事例研究在1982年,我那时是化学工程教授,正集中精力在教三年级的化学变化过程控制。突然,一声轻轻的敲门声惊动了教室的人。那就是杰拉德·杜布里克,丹特克电子公司董事长。他听说我知道一点化学过程控制,便想找我谈一谈粮食干控技术。     

培养一年級学生友爱和同志情誼

培养生学中间友爱和同志情谊,表现出互助合作、互相关心和富有同情心,是苏联学校的一个重要任务。从一年级开始,在他们最重要的活动——学习工作和日常关系中,就应当发展儿童的同志情谊。教师在这个重要工作中起着主要的作用。在这篇文章中,我们将着重指明教师对培养一年级学生中间同志关系的领导作用。我们曾用系统观察薩拉托夫城学校教师工作经验的方法,也用同他们一起工作的方法,研究了这个问题。     

苹果里的星星

一﹁| 一黯黔馨~~苹果里的星星@迪.恩.帕金斯!美     

Any questions?

In spite of their best efforts, nurses still get asked some of the most bizarre questions.     

The MacArthur Communicative Development Inventory: Normative Data for American Sign Language

To This is a 1 test per thousand learn more about normal language development in deaf children, we have developed the MacArthur Communicative Development Inventory for American Sign Language (ASL-CDI), a parent report that measures early sign production. The ASL-CDI is an inventory of sign glosses organized into semantic categories targeted to assess sign language skills in children ages 8 to 36 months. The ASL-CDI uses a recognition format in which parents check off signs that their child produces. The form has demonstrated excellent reliability and validity. To date, normative data have been collected from 69 deaf children with deaf parents who are learning sign language as a first language. We discuss the development of the ASl-CDI and preliminary cross-sectional and longitudinal findings from this early data collection with particular focus on parallels with spoken language acquisition. We also discuss the acquisition of first signs, negation, wh-questions, and fingerspelling with developmental patterns provided based on age, as well as vocabulary size.     

Summer Magic

A点严城澎尸飞枷 1 exl〕eri即eedthegl“yof‘一r,邵lydaw。 Andtheslowlyfadingsha山加切sat名u幻down. Iw“ove门ow元ngwlth」叼卯uslaug扮er As Irana们djumpedin俪cifu[Play And如in山lsJ咖edme公而即d讨the如笋 In myyouth Ie叩n住祀d thema胖ofsu~比‘splendor. My‘oul     

Studying creation of bulk elementary excitation by heaters in superfluid helium-Ⅱ at low temperatures

In this paper, the obtained experimental results concerning creation of bulk elementary excitations （BEEs） in isotopically pure liquid ^4He at low temperatures -60 mK are discussed. Positive rotons＇ （R^＋-rotons） creation by a pulsed heater was studied. Signals were recorded for the following quantum processes： quantum evaporation of ^4He-atoms from the free liquid-helium surface by the BEEs of the liquid helium-Ⅱ, and BEEs reflection from the free surface back into the bulk liquid. Typical signals are shown, and ratios of signal amplitudes are evaluated. For long heater pulses from 5 to 10 μs, appearance of the second atomic cloud consisting of evaporated ^4He-atoms was observed in addition to the first atomic cloud. It is thought that the first atomic cloud of the evaporated helium atoms consists of very fast ^4He-atoms with energies ～35 K evaporated by positive rotons with the special energies ～17 K （～2ER～2×8.6 K with ER representing the roton minimum energy） corresponding to the third non-dispersive Zakharenko wave. The second cloud of slower ^4He-atoms was created by surface elementary excitations （SEEs or ripplons） possessing the special energies ～7.15 K representing the binding energy. It was assumed that such SEEs can be created by phonons incoming to the liquid surface with special energies ～6.2 K corresponding to the first non-dispersive Zakharenko wave which can interact at the liquid surface with the same phonons already reflected from the surface for long heater pulses. Also, some pulsed-heater characteristics were studied in order to better understand the features of such heaters in low temperature experiments.     

心路历程--建议

Dear Friends,Giving advice is one of the most popular pastimes known to mankind. Everyone has some advice to give to everyone else. It is easier to give advice than it is to take advice. Most of us have been given more advice than we can possibly use.I am drawn to this topic because many of our readers ask me to give them advice on a variety(变化,多样性)of different prob-lems.This can be very flattering(讨人喜欢的), and I appreciate your willingness to ask me. I respond to your questions, and I feel free to give my opinions and my comments on any subject. These comments     

论生物課中各种不同教学方法的运用

千篇一律的上課方式是目前中学生物学教学中一个最大的缺点,这种上課方式的特点是:在口头检查学生的家庭作业后,教师講解新教材,演示直观教具,巩固新教材,布置家庭作业。这样的上課結構在有些場合下还可运用,但不能经常如此。如果在上課时运用各种不同的教学方法,特別是让学生独立地研究所分发的材料、活的植物和教科书上的插图的話,学生將能更好地掌握教材。当教师在进行生物学課时所采用的教学方法时应遵循些什么原則呢? 首先,应明确,生物学課程具有那些教学方法,按我們的意見,大致有以下一些:講解法,談話法,中学性的演講法,学生独立工作法,实驗,閱讀教科