The effects of cultural dimension on ICT innovation: Empirical analysis of mobile phone services

ICT Innovation is one of the major forces for socioeconomic development. It is the key element to spur growth of the economy of a nation. Several studies have shown that culture is a crucial determinant of innovations. This study examines the effect of socio-cultural factors on ICT innovation with specific focus on the mobile banking services. Research was conducted on 220 respondents from sampled population in South Africa. The questionnaire used in this study was developed based on previous studies that have proven validity. The findings indicate that culture is an appropriate concept to describe how innovation in information and communication technology can be influenced by human behavior.     

WAP技术在构建手机移动教学中的应用分析

随着社会经济的发展,带动了科学技术的进步,手机目前已经成为人们在日常生活中沟通和交流的主要工具,具有携带方便和廉价等特点,使用人群呈现出逐渐增长的发展趋势,构成了一个巨大的网络发展平台.应该充分利用手机优势,开展远程教学,有助于突破学习的时空限制,对提高教学效果具有重要作用.WAP技术是移动学习研究领域中的重要研究内容,将手机运用到该项教学中来,创新了教学方式,扩展了学生的学习场所.     

基于智能手机摄影的接触角测量实验

建立了一种基于智能手机摄影测量接触角的简便方法，使用附加近摄镜的智能手机对固体表面的液滴进行拍摄，对图片进行测量和计算即可测得其接触角。该方法简单廉价，较为准确，可用于研究表面活性剂对接触角的影响，亲水和疏水表面对接触角的影响等。使用该方法可以在物理化学实验、精细化工实验等课程中引入接触角相关实验，增进学生对接触角概念的理解。     

基于LTSPICE的手机充电器电路仿真设计实验

模拟电路的计算机辅助设计是电子类本科生的必备专业技能，本文采用LTSPICE软件对RCC结构手机充电器电路进行设计仿真，通过分析元器件模型及参数选取、电路启振和稳定工作过程，以及外部环境和元器件参数对电路性能的影响，实现了电路的计算机辅助设计和调试。该实验既能使学生理解简易的RCC开关电源的工作原理，又能掌握电路计算机仿真的方法。非常适合于模拟电路类课程实验。     

移动互联网浪潮下智能终端产业发展研究

智能终端操作系统的出现引发终端产业革命，全球终端产业产生颠覆性变革。本文以全球智能终端产业发展现状为基础，全面探讨终端趋势变化，包括市场需求区域的迁移、终端技术的微创新聚焦、智能路由等泛终端产业的兴起等。目前我国本土企业虽然已打破内需市场国际垄断格局，但仍面临核心技术不足、品牌质量普遍偏低、泛终端发展不成熟等诸多问题。基于我国发展优劣势，从多个维度提出系列发展建议。     

Why do people access news with mobile devices? Exploring the role of suitability perception and motives on mobile news use

Using self-reported survey data (N = 281), the present study explores the structural relationships among mobile users’ perceptions of the suitability of two types of mobile news (political feature news and entertainment news), users’ motivations for mobile news usage, and their behavioral patterns. Our findings show that two types of perceived suitability for mobile news, particularly for political feature news, are strongly associated with all dimensions of motivations for mobile news usage. Furthermore, as predicted, our findings show that the information-seeking motive is the very factor that determines mobile news usage. The results also reveal that the accessibility motive mediates the relationship between the perceived suitability of obtaining news via a mobile device and users’ mobile news behavior. However, contrary to our expectation, the social utility motive does not mediate the relationship between users’ perceptions of the suitability of mobile devices for this purpose and their mobile news usage. Finally, the information-seeking and accessibility motives each have an indirect effect on the association between perceived suitability and mobile news usage. The implications of the study and recommendations for future research are also discussed.     

A Micellar Multitasking Device: Sensing pH Windows and Gauging the Lipophilicity of Drugs with Fluorescent Signals

A multitasking fluorescent device can be obtained by forming micelles of Triton X‐100, containing a lipophilic macrocyclic Cu²⁺ complex and the coordinating fluorophore Coumarin 343 (C343), which features a COOH moiety. At low pH the two micellised components do not interact, and the fluorescence of Courmarin 343 (C343) is intense. At intermediate pH, C343 is deprotonated and coordinates to the Cu²⁺ centre in its apical position, with fluorescence quenching. At higher pH the deprotonated C343 is displaced from Cu²⁺ by the formation of an OH^? complex, and the fluorescence is revived. This allows the system to carry out its first task as it behaves as an “on–off–on” fluorescent sensor for pH windows. The “off” part of the window ranges from pH 6 to 8. In this interval, in which the carboxylate form of C343 is apically coordinated to the Cu²⁺ complex inside micelles, the device carries out its second task, that is, it behaves as a gauge for lipophilicity. For pHs between 6 and 8, molecules containing a COOH group are in their COO^? form and distribute between bulk water and micelles proportionally to their lipophilicity. Upon entering the micelle, their COO^? moiety competes for coordination with C343, displacing it from the Cu²⁺ centre, and this results in fluorescence revival, the intensity of which is also proportional to the lipophilicity of the examined molecule. We have chosen the physiological pH value (7.4) as the working pH, and we have examined the lipophilicity of fatty acids and of the widely used family of non‐steroidal anti‐inflammatory drugs (NSAIDs). The device successfully measures their lipophilicity, expressing it with an “off–on” type fluorescent signal, as demonstrated by the correlation of the fluorescence increase with the logarithmic water/octanol partition coefficient (log P) and with the difference between the pK_a observed in micelles and that measured in water for NSAIDs.     

基于Matlab的FIR滤波器在DSP中的实现

本文主要对基于Matlab的FIR数字滤波器的设计与如何在DSPOP得到实现进行了研究,介绍Matlab中实现FIR滤波器设计的窗函数法。并结合具体的实例,介绍了如何将Matlab设计的滤波器完成到DSP的FIR滤波器的转化。     

通用手机充电器及其接口设计和标准化

介绍了通用手机充电器标准YD／T 1591--2006在连接结构、USB接口和充电方式上的创新设计;详述了充电器和手机的电气特性要求,以及手机与电脑连接的充电设计;最后对手机节能设计和传导性电磁干扰的限制性技术要求进行了总结。     

吸波材料在手机辐射防护中的作用

用FDTD数值模拟的方法,建立了涂敷吸波材料的手机与人体相互作用的计算模型。比较了使用吸波材料对降低手机辐射剂量SAR值的作用,并分析了其对手机通信性能的影响。结果表明：使用吸波材料可以明显降低手机对人体的辐射。