在物理教学中运用多媒体应注意的问题

在物理教学过程中如何适时地利用多媒体辅助教学，关键是要找准多媒体教学的最佳作用点．利用多媒体技术创设物理情境，可激发学习兴趣；利用多媒体技术可强化教学重点，突破教学难点；利用多媒体技术演示物理实验，可再现物理过程；利用视频投影，加大课堂信息量，可提高课堂效率．     

高水平的"大学物理电子教案"是多媒体教学的灵魂

清华大学的“大学物理”多媒体教学已进行了 7个年头 ,回顾和总结多年的多媒体教学的实践 ,使我们充分地认识到 :合理地运用多媒体无疑是为我们的教学注入了兴奋剂 ;是提高教学质量的催化剂 .但我们也认识到 ,多媒体毕竟是一种教学手段 ,而主导教学质量的核心是教师的学术水平和教学水平 .基于这样的认识 ,几年来 ,我们清华工科物理教学基地在“大学物理”的教学课程中 ,除了在多媒体的硬件方面做了很多改善以外 ,主要精力放在如何提高“大学物理电子教案”的质量上 ,也就是在学术质量上对老师提出了严格的要求 .同时 ,为了保证多媒体教学的…     

利用多媒体教室实现高效的中学物理教学

随着计算机和网络技术的迅速发展，农村中学也建立起多媒体教室，为物理教学的现代化开辟了广阔天地．有效地利用多媒体教学，通过丰富的实时表现形式和强大的师生交互功能，进行物理教学，对于快速提高学生的理解能力，纠正学生的习惯性错误思维有着传统的教学方法无法比拟的优势．     

谈如何编制优质多媒体物理课件

利用网络进行多媒体物理教学，是信息时代对教师提出的一个革命性挑战．采用多媒体教学，不仅使传统的教学理念、课程体系和课堂结构产生了巨大变化，也使学生的视野更开阔，思维更活跃；使他们能够在丰富的学习资源环境中自主学习，从而调动学生的内在积极性，激发学生的潜能，真正做到变被动为主动学习，进一步深化学习效果，提高学生综合素质．与此同时，网络技术的发展也使得教师能对学生进行更有针对性的引导，便于对不同层次的学生进一步实施个别指导，真正做到因材施教，从而大大提高教学效果     

浅谈多媒体在物理教学中的应用

多媒体近年来已成为现代物理课堂教学中必不可少的手段．多媒体辅助物理教学，可以化抽象为直观、化微观为宏观、化静态为动态、化不可操作过程为可操作过程．对于突破教学重点、化解知识难点，培养学生的综合能力，推进素质教育具有重要意义．如何在新的课程标准的指导下，将多媒体技术应用于物理教学，提高物理课堂教学的效果，是广大物理教师在教学实践中值得探究的课题之一．     

物理教学中多媒体的使用方法——软件篇

作为物理教师,如果在用好硬件的基础上,再搭配上娴熟的软件应用技术,将会使整个多媒体教学如鱼得水,迈向腾飞．本文继硬件篇之后,再从软件上简介一些多媒体的使用方法、注意点和技巧,以便用好多媒体,让新教师用活多媒体．     

探讨兴趣教学在中学物理中的应用

在物理教学的过程中,教师可以利用现代化的教学手段,使用多媒体材料、情境教学的手段,积极的将学生的注意力转移到物理教学的过程中,通过多种有效的方式来提高学生的学习兴趣,从而使他们能够自觉的投入到物理学习的具体过程中,从而提高学生的物理成绩.     

多媒体教学之我见

随着计算机的发展，多媒体教学越来越多地应用于各个教学环节，物理教学更是得天独厚．由于物理教学中涉及到许多抽象过程、微观过程、极端过程和结构复杂的实验仪器等，这些都特别适于采用多媒体课件进行表现，因此给这门古老的课程注入了新的活力，但也带来了一些负面效应．下面以个人在实际教学中的具体情况，谈些对多媒体教学的粗浅看法和体会．     

教学中的多媒体课件作用

随着多媒体技术的迅速发展 ,多媒体课件在课堂教学中的运用也越来越广泛 ,但其教学效果存在极大差异 .笔者就如何在课堂教学中发挥多媒体课件的作用 ,谈一些看法 .1　运用多媒体技术应重视学法指导多媒体教学与传统教学的模式有所不同 ,多媒体技术具有图、文、声、像并茂的特点 ,为学生提供直观、生动的感性知识 ,从而调动学生的视觉和听觉功能 .将过去的以听、想为主 ,变为视、听、动、想相结合 .但教学实践和调查研究发现 ,相当一部分学生已经习惯于在课室中老师边讲边画或边讲边写的模式 ,对多媒体教学模式感觉象看电影一样 ,不知如何去…     

电子信息技术在固体物理教学中的应用

为解决固体物理教学中存在的晶体结构不易讲解、理论推导复杂易导致物理图像不清晰的问题,本文对以多媒体技术和网络技术为核心的电子信息技术辅助固体物理教学进行了研究,总结了多媒体技术在晶体三维结构、布里渊区、晶格振动和电子能带理论教学中的具体应用及效果,又列举了网络资源在固体物理课教学中的应用及效果.实践表明,多媒体技术的恰当应用,能使学生更深入地理解相关的固体物理知识,建立清晰的物理图像,达到良好的教学效果;而网络技术的有效应用,可以扩展学生的视野,提高学生自主学习的能力.     

Fluctuations in number of photons in region of unstable behavior in process of intracavity generation of second harmonic

Quantum fluctuations of the number of photons of the fundamental mode and of the second harmonic in the process of intracavity generation of the second harmonic in the unstable region of the system are studied. The distribution functions of the number of photons of interacting modes are calculated in the positive P-representation. The functions of the joint distribution of the number of photons of the fundamental mode and the number of photons in the second harmonic are also studied.     

皮革中甲醛含量测量不确定度评估

依据GB/T 19941-2005标准,测定了皮革中的甲醛含量,对测量结果的不确定度来源进行了分析和评定,并计算出合成不确定度和有效自由度,最后根据JJF1059规范要求给出了甲醛测量不确定度表达式.     

一种在弱酸性介质中有电化学发光性能的鲁米诺衍生物

报道了一种鲁米诺的衍生物-3-(1-乙酰丙酮偶氮)苯二甲酰肼在酸性介质中的电化学发光行为,该化合物与鲁米诺类似,发生两步电化学氧化反应,但其氧化电位较鲁米诺低约0.5V,在氧化铟锡玻璃电极上具有良好的电化学发光性能,有效地避免了氧化铟锡玻璃电极本身的发光干扰.不仅在碱性介质中具有较高的电化学发光效率,而且在酸性介质中也产生较稳定的电化学发光,在1.0×10-6mol/L以上浓度,电化学发光强度与浓度有良好的线性关系.     

Correlation in calculations of density of states in thin films

The density of electronic states and its spatial distribution in thin films are considered including the electron correlations in the coherent phase approximation applied to the intra-atomic interaction. This new approach allows us to derive the line shape for electronic levels which is important from the point of view of the convergency for the density function in the case of systems with restricted dimensions. Detailed calculations are performed for 4s copper film functions with the fcc lattice and various crystallographic orientations of the surfaces.The authors are very grateful to Professor L. Valenta (Prague) for his kind interest in this paper and to Dr. J. Mizia (Cracow) for helpful discussions. We would like to express our gratitude to Professor M. Wonicki and Mrs M. Firszt (Toru) for their help in obtaining the computer program procedure for two-particle interaction integrals calculations.The paper has been done in the framework of the Problem M.R I-11.     

Inhibition of corrosion of aluminium in presence of fluorescein in basic medium

The influence of Fluorescein in conjunction with calcium oxide on the corrosion of Aluminium in 1.0 N NaOH was studied by galvanostatic studies and weight loss studies. It has been found that the inhibition of corrosion of aluminium increased with the increasing concentration of the inhibitor. The maximum inhibition efficiency of fluorescein alone was found to be 30.80%. However, the addition of calcium oxide increased the maximum inhibition efficiency to 53.71%. The corrosion process was found to be under the anodic control, in the presence or in the absence of inhibitor. The inhibition was found to be mixed type. Paper presented at the 2nd International Conference on Ionic Devices, Anna University, Chennai, Inida, Nov. 28–30, 2003.     

Deflection of IR-radiation in n-InSb in the presence of temperature-electrical instability in a magnetic field

The formation of an S-shaped volt-ampere characteristic (VAC) during the heating of a specimen of n-type indium antimonide by a dc electric current in the presence of an external magnetic field is considered. In the calculation of the VAC the temperature dependences of the band gap width, the carrier density, the mobility, and the heat conductivity are taken into account. The angle of deflection of IR-radiation in indium antimonide is calculated using the density distribution over the cross section of the specimen derived from the integration of heat conductivity equation. The experimental and theoretical dependences of the deflection angle on the current are in agreement in order of magnitude and indicate that it is possible to use the temperature instability for the construction of laser radiation deflectors in the IR range.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 35–40, November, 1984.The authors are grateful to V. L. Bonch-Bruevich and I. P. Zvyagin for useful discussion and valuable critical remarks.     

Emergence of differences in potential in wood as a result of natural changes in temperature

The emergence of differences in potential in a natural macromolecular heterogeneous structure (wood) upon natural changes in temperature with allowance for humidity is considered. It is shown that the magnitude of the emerging difference in potential in the wood is proportional to the change in temperature and grows along with the humidity of the wood.     

The role of carbon in the precipitation of oxygen in silicon

Oxygen precipitates were formed in Czochralski-grown silicon samples at different temperatures and for different lenghts of times of heat treatment. Precipitation was evident from infrared(IR) analysis of so treated samples. These samples were irradiated with 2 MeV electrons at near room temperature (310 K). Deep level transient spectroscopy measurements and IR measurements were performed on these samples. The results show directly that a single carbon atom or a carbon-oxygen complex can serve as nucleation centers for the oxygen precipitation.