一种新的人机界面—PUIs

长期以来 ,图形用户界面 (GUIs)一直是人机交互 (HCI)的主流平台。GUI风格的交互让用户使用计算机时更为方便 ,尤其对于办公自动化应用。然而 ,随着人们使用计算机方式的变化以及计算任务种类和数量的大量增加 ,GUIs已经很难实现满足用户需求所必需的所有交互形式。为了适应更多更广的情况 ,人们需要一种更自然、更直观、能自适应、更易为人们接受的界面形式。于是 ,感知用户界面 (PUIs—PerceptualUserInterfaces)成为人机界面中的新热点 ,其主要目的是使人机交互更像人与人之间的交互以及人与世界的交互。本文介绍了蓬勃发展的PUI领域 ,然后简要介绍了三个基于视觉技术的实际系统     

基于立体视觉的非穿戴指势识别方法

基于彩色图像中红、绿、蓝3分量强度在阴影区域存在差异,根据小波变换在时域和空域均具有优异的局部化特征,结合背景差分,进行小波多尺度变换,提取视频指势对象,所提方法不需场景学习与训练、手工校正及先验假设等信息,可克服动态场景变化、阴影、噪声干扰等影响,具有强的鲁棒性.基于人类生物结构特征,采用不易遮挡和不受人脸朝向、姿态、光照变化等影响的头项特征代替人眼特征,保证了人机交互活动的自由性和自然性,且提高了人机交互的时效性.融合手指尖特征和手臂中心轴线及其外极线的多几何约束策略,采用求解反对应方法.确保手指特征匹配对应的正确性.通过实验验证,证实了上述方法有效、可行,可应用于实时、非穿戴的自然指势视觉3维人机交互中.     

基于HCI状态机的蓝牙无线通信系统模型

蓝牙是一种短距离无线通信的技术规范。分析了蓝牙协议栈中主机控制器接口(HCI)的重要地位和主要功能,介绍了基于HCI的蓝牙应用系统的开发方式。文章详细分析了基于蓝牙模块的数据通信系统构成,着重介绍了使用HCI状态机的处理机制来实现HCI驱动的方法。依据蓝牙无线通讯系统模型,介绍了单片机与PC机蓝牙通信的应用实例,证实了该系统模型稳定可靠。     

基于嵌入式Linux的蓝牙通信的实现

蓝牙是短距离、低成本无线通信技术之一,它可以用于替代移动设备之间的通讯电缆,从而形成个人无线网络。一个蓝牙系统在整体上可以分为底层硬件系统和上层软件系统,蓝牙软件协议是整个蓝牙结构体系中的重要核心部分,是实现蓝牙各种功能的关键因素。本文探讨了蓝牙通信的最基本也是最重要的方面,基于HCI指令的蓝牙串口通信,通过指令的探讨,利用蓝牙模块实现了PC机间的串口（RS-232）通信,并且在10m距离内达到了预期的通信效果。     

Model-driven development of interactive groupware systems: Integration into the software development process

Modeling interactive groupware systems is a complex and multi-disciplinary task. It is necessary to provide designers and engineers with a set of methods, notations and tools to specify the different aspects to consider when designing this type of systems. In this work we present a methodological framework based on the integration of several notations and processes for modeling some of these aspects, in particular: interaction, collaboration and functionality. The objective of this work is to provide a more complete support to the design of groupware systems, considering different viewpoints and modeling perspectives of the several stakeholders involved in the development of such applications.     

Checking email less frequently reduces stress

Using email is one of the most common online activities in the world today. Yet, very little experimental research has examined the effect of email on well-being. Utilizing a within-subjects design, we investigated how the frequency of checking email affects well-being over a period of two weeks. During one week, 124 adults were randomly assigned to limit checking their email to three times a day; during the other week, participants could check their email an unlimited number of times per day. We found that during the limited email use week, participants experienced significantly lower daily stress than during the unlimited email use week. Lower stress, in turn, predicted higher well-being on a diverse range of well-being outcomes. These findings highlight the benefits of checking email less frequently for reducing psychological stress.     

A theoretical agenda for feminist HCI

HCI has a complex and often ambivalent attitude towards the issue of gender and interactive systems. Here I discuss three dominant paradigms for treating gender in HCI, and discuss their limitations. Next, I will present the theoretical perspectives on gender which are on the fringes of HCI - Technology as Masculine Culture, Gender Positionality, and Lived Body Experience - and discuss their possible contributions. I will show how this supports a reassessment of the use of gender theory in technological settings and its relevance for framing questions of gender in HCI. My goal in doing so is to argue for the importance of a more direct treatment of gender in HCI and move towards a feminist theory for HCI.     

Application profiles of integrated circuits in various industry fields

Integrated circuits play an increasingly important role in various fields.The aging effects,which lead to robustness problems in integrated circuits,has gained more attention.Therefore,during the design process the robustness problem must already be calculated.Generally,the time-dependent influences such as NBTI（negative bias temperature instability）and HCI（hot carrier injection）contribute to circuit aging problems[1].     

双态应力薄膜整合的CMOS开关特性与可靠性研究

本文采用优化的多循环离子体增强化学气相薄膜淀积工艺,在不影响器件的热载流子注入(hot-carrier Injection,HCI)和负偏压温度不稳定性(Negative Bias Temperature Instability,NBTI)的前提下,改善半导体器件的开关特性。我们以32nm多晶硅(polycrystalline-Si/SiON)栅极制造工艺生产的半导体器件为测试对象,其核心器件(Core Device)工作电压是1.0V,外围器件(I/O device)工作电压是2.5V。实验结果显示,对比原有的基础工艺(Base Line),优化的SiN薄膜淀积工艺可以使NMOS的开关特性提高2-5%。核心NMOS的HCI寿命增加一倍,核心PMOS NBTI、I/O NMOS HCI和I/O PMOS NBTI与基础工艺条件的结果比较没有明显的退化。