Supplementary tests for confirmation of brain death

In 1959, the concept of brain death (BD) or ir- reversible coma was described by Mollaret and Goulon (1959). The first guideline (the Harvard cri- teria) for deciding BD was established in 1968 (Ad Hoc Committee of the Harvard Medical School, 1968). This concept has been accepted worldwide although its fundamental meaning is not exactly globally uniform yet. Some countries (e.g., the US) view BD as whole brain death, while     

Barry C.KEENAN,Neo-Confucian Self-Cultivation

Barry C.Keenan has been acknowledged as an influential American Sinologist since his doctoral dissertation entitled The Dewey Experiment in China:Educational Reform and Political Power in the Early Republic was published by Harvard University Press in 1977.His deft approach to the sociological history of Chinese education was further exemplified in his second monograph,Imperial China's Last Classical Academies:Social Change in the Lower Yangzi,1864-1911,published by the University of California Press in 1994.This academic background suggests that Keenan had been actively involved in the new cultural history movements that sprung up in the 1970s.     

言语行为

The theory of Speech Act is one which analyses the role of utterancesin relation to the behaviour of speaker and hearer in interpersonal comm-unication.It was originally put forward by John Langs haw Austin.a pro-fossor philosphy at Oxford University.In 1955,he gave a serics of lectu-res at Harvard University in U.S.A,and after his death,the written s-cripts of his lectures were published(1962)with the title How to Do T-hings with words.The theory aroused wide interests among the Linguisticphilosophers.Late,Searle and Grice,two ther philosophers made furthercontributions to the theory.     

趣味阅读

The Mississippi is one of the longest rivers in the world. It was called “The Father of Waters”by the American natives. Drinking water was got from the Mississippi by people in towns and cities. Water for industrial use was got from it by facto-ries. But today “The Father of Waters”is in trouble. A lot of large factories were built along the river. Millions of tons of in-dustrial water was poured into the river. Its water for drinking was no longer able to be used. Birds and fish wer…     

Experimental Study on Heat Transfer and Pressure Drop of Micro-Sized Tube Heat Exchanger简

A micro-sized tube heat exchanger(MTHE) was fabricated, and its performance in heat transfer and pressure drop was experimentally studied. The single-phase forced convection heat transfer correlation on the sides of the MTHE tubes was proposed and compared with previous experimental data in the Reynolds number range of 500—1 800. The average deviation of the correlation in calculating the Nusselt number was about 6.59%. The entrance effect in the thermal entrance region was discussed. In the same range of Reynolds number, the pressure drop and friction coefficient were found to be considerably higher than those predicted by the conventional correlations. The product of friction factor and Reynolds number was also a constant, but much higher than the conventional.     

In-situ production of ozone and ultraviolet light using a barrier discharge reactor for wastewater treatment

A dielectric barrier discharge （DBD） reactor consisting of water-filled dielectric tube electrodes was used for the treatment ofwastewater. The inner dielectric tube, which acted as the discharging electrode, was filled with an aqueous electrolyte solution. The outer dielectric tube, which served as the other electrode, was in contact with the wastewater, which was grounded. The present reactor system was energy-efficient for the production of ozone, not only because the perfect contact between the aqueous electrode and the dielectric surface minimized the loss of the electrical energy, but also because the DBD reactor was cooled by the wastewater. In addition, the ultraviolet （UV） light produced in the DBD reactor was able to assist in the wastewater treatment since the quartz tube used as the dielectric material was UV-transparent. The performance of the present DBD system was evaluated using a synthetic wastewater formed from distilled water and an azo dye, amaranth. The experimental parameters were the concentration of the electrolyte in the aqueous electrode, the discharge power, the initial pH of the wastewater and the concentration of hydrogen peroxide added to the wastewater. The wastewater treatment system was found to be effective for achieving decomposition of the dye.     

哈佛大学

①Have you heard of the Harvard University?The Haryard University is the oldest and one of the most famous universities in America. 你听说过哈佛大学吗?哈佛大学是美国最古老的大学,也是最杰出的学府之一。     

A generalized sinusoidal model and its applications

A physical model of sinusoidal function was established. It is generalized that the force is directly proportional to a power function of the distance in a classical spring-oscillator system. The differential equation of the generalized model was given Simulations were conducted with different power values. The results show that the solution of the generalized equation is a periodic function. The expressions of the amplitude and the period （frequency） of the generalized equation were derived by the physical method. All the simulation results coincide with the calculation results of the derived expressions. A special function also was deduced and proven to be convergent in the theoretical analysis. The limit value of the special function also was derived. The generalized model can be used in solving a type of differential equation and to generate periodic waveforms.     

Study on the Crystallization Mechanism of Spectinomycin Dihydrochlodde

The growth mechanism of spectinomycin dihydrochloride crystal in pure water and acetone-water mixture at different temperatures has been studied by induction period measurement. The induction period was measured visually. The solid-liquid interfacial tension was determined on the basis of classical homogenous nucleation theory and the surface entropy factor was calculated. It was shown that the interfacial tension and surface entropy factor increased with the increase of acetone concentration and the decrease of temperature. It was demonstrated that the growth mechanism of spectinomycin dihydrochloride crystal was controlled by birth and spread growth in pure water or in acetone-water mixture at high temperatures and turned from birth and spread growth tc spiral growth with the increase of acetone concentration in acetone-water mixture at low temperatures.     

Preparation of Urea Nitrogen Adsorbent of Complex Type and Adsorption Capacity of Urea Nitrogen onto the Adsorbent

The urea nitrogen adsorbent of complex type, which consists of chitosan coated dialdehyde cellulose （CDAC） and immobilized urease in gelatin membrane （IE）, was prepared. The cellulose, the dialdehyde cellulose （DAC） and the CDAC were characterized by scanning electronic microscope. The results indicate that the cellulose C2-C3 bond was broken under the oxidation of periodate and it was oxidated to DAC. The DAC was coated with chitosan and the CDAC was obtained. The adsorption of urea nitrogen onto the adsorbent in Na2HPO4-NaH2PO4 buffer solution was studied in batch system. The effects of the experiment parameters, including degree of oxidation of CDAC, initial urea nitrogen concentration, pH and temperature, on the adsorption capacity of urea nitrogen onto the adsorbent at CDAC/IE weight ratio 10：1 were investigated. The results indicate that these parameters affected significantly the adsorption capacity. The adsorption capacity of urea nitrogen onto the adsorbent was 36.7 mg/g at the degree of oxidation of CDAC 88%, initial urea nitrogen concentration 600 mg/L, pH 7.4 and temperature 37℃.     

大学的经济动力:哈佛大学管理公司

哈佛大学成立以来就开始对外投资,经历多次资产管理改革,最有效的改革是建立了非盈利性质的哈佛管理公司.公司全权负责管理哈佛大学资产,以便更有效地保证资产的保值和增值.尽管公司管理的捐赠基金经历金融危机重创,但其投资收益仍然为哈佛大学带来三分之一以上的运行经费,成为哈佛大学履行培养精英人才、进行科学研究不竭的经济力量.     

哈佛大学核心课程设计研究

哈佛大学核心课程是哈佛本科课程的组成部分之一,是一种通识教育课程,体现着哈佛大学一贯的教育宗旨和理想,在美国也极具典型意义。通过分析哈佛大学核心课程设计在课程目标、课程内容的选择和组织、课程实施和课程评价四方面的特征,总结其成功经验,以期为我国大学通识课程设计提供参考。     

选拔现代精英:哈佛大学无障碍招生政策及其分析

哈佛大学的无障碍招生政策是一个政策组合,主要包括"两不一需"的录取资助政策、待审程序政策和高度量化和高度个性化政策等.实施这些政策组合的目的是使所有符合条件的申请者都能无障碍地进入哈佛大学.无障碍招生政策对我国大学的招生特别是单独招生有着重要的借鉴意义.     

哈佛大学的普通教育理念

20世纪上半叶,普通教育在美国社会受到广泛重视。哈佛大学发表《自由社会中的普通教育》报告,阐述了哈佛大学普通教育的理念以及哈佛大学的普通教育计划。哈佛大学的普通教育理念,既反映了现代大学在人才培养上的价值追求,又折射出大学传统与创新的关系。     

哈佛大学本科生住宿制和导师制

哈佛大学本科生教育的重要特色之一是住宿制和导师制,学院式生活方式一直是哈佛大学的崇高目标.哈佛大学的住宿制和导师制经历了模仿起步、中道废弛、改造重振、稳步发展的历程,成为哈佛大学本科生必修课程、选修课程之外的第三课程.     

哈佛大学暑期学校的发展历史与教育理念研究

在一百多年的发展历程中,哈佛大学暑期学校在不同时期进行了许多有益的变革,形成了自己的特色并适应了外界变化的需求;同时,暑期学校在发展中也一直坚持着一些宝贵的教育理念,如进行优质教育资源互补、重视课程开发和综合性教育氛围的建设等,这些都促成了它今日的成功.本研究立足于暑期学校发展的历史,对其不同阶段的发展变革以及背后所遵从的教育理念进行了探讨,试图加深我们对于哈佛大学暑期学校的理解,同时提升我们对于暑期学校功能与作用的认识.     

哈佛大学网上公开课的制作技术和课堂行为分析

随着开放教育资源运动的不断发展,推动了国外名校公开课的发展。本文对哈佛大学24节“公平与正义”公开课进行深入的观察和数据统计,从视频角度分析哈佛大学公开课的制作技术和课堂行为,探讨哈佛大学开发优质课程视频资源的可取之处,为国内高校视频教育资源建设提供参考。     

招募精英：论哈佛大学的招生

哈佛大学招募精英经历了贵族精英阶段、学术精英阶段、平民精英阶段,每一阶段总能随着社会、经济、文化等的发展既继承优秀传统又具有时代特点。本文分析了哈佛大学每个阶段的招生特征,并指出,为培养新时代的精英阶层,哈佛大学制定了在高度量化基础上的高度个性化、无障碍入学、国际化等招生政策。     

哈佛大学与复旦大学自主招生制度比较研究

自主招生制度是大学准入制度的核心之一,在大学人才培养中发挥着重要作用。哈佛大学和复旦大学分别为美国和中国推行自主招生制度的典型高校,且两者各有千秋。从招生机制看,哈佛追求自由,复旦注重政治;从招生标准看,哈佛强调能力,复旦侧重水平;从招生程序看,哈佛崇尚自治,复旦偏重法治;从招生来源看,哈佛取向开放,复旦看重地域;从招生考试看,哈佛主张多元,复旦倾向统一。借鉴哈佛经验,我国高等教育应当改革统一招生模式,全面推行素质教育;完善高考科目设置,融通中学大学壁垒;扩大高校自主权利,切实推行学术自由;完善教育立法建设,努力推进教育公平。