Message design guidelines for screen-based programs

Abstract This paper discusses message design for screen-based (computer and video) instructional programs. Message design is defined as the art and science of planning for the manipulation of the physical form of the message. Including a comprehensive literature review, this paper supplies information based on personal experience. There are three main purposes for this work. The first purpose is to present a compilation of present conventions. The second purpose is evaluating these conventions in terms of their current relevance. The third purpose is to suggest a new set of guidelines for the instructional designer or message designer creating screen-based instructional programs.     

北京市 X 线胸透受检者的体表照射量及其分布

本文报道北京市医疗照射剂量调查中,X 线胸透受检者的体表照射量调查方法与结果。采用两阶段抽样法,对门诊胸透调查了33个医院,1525人次,体检胸透调查了21个医院,870人次。门诊胸透和体检胸透一次检查受检者体表参考点处的平均照射量分别为1.29±0.26R 和0.613±0.148R。同时还得到了这两种胸透检查受检者的体表照射量分布。     

华光文本转换成一般文本的一种方法

由不同字处理软件所编排的文本的差异给用户带来了麻烦，为了解决这一问题，作者在本文中提出了把这些不同文本转换成一般文本的方法，并给出了一个华光文本转换成一般文本的程序。     

Modelling by impedance measurements of screen printing electrodes containing different ratio of poly(vinyl chloride) and cellulose acetate

Electrodes with different thick-film compositions were prepared by screen printing procedure. All the conducting inks contain graphite powder mixed with different ratios of poly(vinyl chloride) (PVC) and cellulose acetate (CA) until homogenization. Their behaviours were investigated by electrochemical impedance spectroscopy (EIS) and exhibit some modifications in electrochemical interfacial properties depending to the PVC/CA ratio. All EIS curves fit well with two different circuits corresponding to the presence or absence of PVC in the blend, and the variations of individual values of parameters deduced from impedance fits were examined.     

GlossmarkTM Technology:An Innovative Digital Watermark

GlossmarkTM technology is a digital watermark process that embeds a visually striking gloss image within a high quality color print without the need of special papers or toners. It utilizes the angular dependence of gloss to create a differential-gloss image through the modulation of halftone structures. Both the primary image and the embedded GlossmarkTM image can be distinctively viewed from different perspectives with little interference. The strong directional nature of the gloss and the subtle halftone modulation process make GlossmarkTM images very difficult to detect by a scanner and even more challenging to reproduce through scanning and printing. The GlossmarkTM technology is ideally suitable for document authentication and graphics enhancement. Its digital implementation provides a capability to embed variable data as digital watermarks into individual prints quickly and economically.     

面向个人的词码输入方式及其软件支持系统PLED

对非专业键盘操作人员来说,汉字的输入仍然是起制约作用的瓶颈问题.为了解决这一困难,我们提出一种高度灵活自治的中文信息输入方式——面向个人的词码输入方式.文中还详细介绍了一个支持这种方式的中西文屏幕编辑软件PLED(Personal Lexical Editor).     

外资企业管理信息系统的设计与实现

本文介绍了一个用ＴｕｒｂｏＣ编程实现的外资企业管理信息系统．该系统构造了一个外资企业管理信息数据库，它可以快速地执行各种信息查询和报表输出任务．该软件设计了一个虚屏显示函数，实现了大格式报表的即时屏幕显示．     

Li-doped (Ba,Sr)TiO3 thick film interdigital capacitors for microwave applications

Microwave properties of Li-doped (Ba,Sr)TiO₃ thick film interdigital capacitors have been investigated. According to the reported papers, BaSrTiO₃ materials, paraelectric state at the room temperature, have high dielectric permittivity (>500 @ 1 MHz) and low loss tangent (<0.01 @ 1 MHz) in epitaxial thin film form; however, the sintering temperature of BaSrTiO₃ is over 1350 °C. In order to reduce the sintering temperature, Li (3 wt%) was added to the BaSrTiO₃ materials, and 10 μm thick Li-doped (Ba,Sr)TiO₃ films were screen printed on the alumina (Al₂O₃) substrate and sintered at 900 °C. Interdigital capacitor patterns with five fingers of 200 μm gap and 250 μm length were also designed and fabricated by employing the screen printing method with Ag electrode. The structural feature was analyzed with X-ray diffraction method. Frequency and temperature-dependent dielectric properties were characterized from 1 kHz to 1 MHz and 303-403 K, respectively. Also, current-voltage characteristics were investigated with an elevated temperature. Microwave transmission and reflectance properties of thick film interdigital capacitors will be discussed, and frequency dispersion of dielectric properties will be presented. Specially, designed Au/Li-doped (Ba,Sr)TiO₃/Ag-Pd/Al₂O₃ vertical structure was prepared to measure the tunability. In this sandwich type structure, Li-doped (Ba,Sr)TiO₃ films showed tenability of 7.15% at a bias electric field of 20 kV/cm.     

屏风与人居文化

屏风是中国人居环境设计中一种极为活跃的元素,通过对它的研究透射出中国传统人居文化的博大精深。本文通过分析传统及现代屏风的应用来研究屏风与传统人居文化。     

一种采用蓝牙技术控制的LED点阵屏设计

针对LED显示屏应用中存在的问题,给出了一种低成本、内容更新便捷的点阵LED文字显示屏的方案。系统采用C8051F410作为MCU,利用蓝牙模块接收手机蓝牙传输的数据,并将数据通过单片机控制字库芯片进行字符集的转换、点阵代码的提取,进而由单片机控制点阵屏更新显示数据。经实际使用,控制稳定、方便。