利用CC2430构建的无线温湿度监测系统

利用低成本、低功耗的ZigBee无线技术构建无线家居温湿度监测系统,利用无线技术的人性化来提升家用监测系统的可行性和实用性。所设计的无线温湿度监测系统中的节点以CC2430为核心,电路简单。文章介绍了该系统的硬件和软件设计思想。     

基于ZigBee的无线键盘设计研究

ZigBee是一种近距离、低复杂度、低功耗、低数据速率、低成本的双向无线通信技术,为小型廉价设备的无线联网和控制提供了一种较好的解决方案。文章对ZigBee技术的特点和应用领域进行了探讨,并提出了一种基于ZigBee技术标准的无线键盘设计方案。     

ZigBee技术在UPS电池监视管理系统的应用

文章研究了UPS中电池监视系统的发展,并概述了铅酸蓄电池特性及ZigBee技术。运用ZigBee无线模块实现了实时监测电池运行状态的系统,该系统中的无线节点采集电池的电压、电流和温度等参数,并通过无线网络将这些数据发送到协调者,协调者转发给PC方。     

ZigBee技术在UPS电池监视管理系统的应用

文章研究了UPS中电池监视系统的发展,并概述了铅酸蓄电池特性及ZigBee技术。运用ZigBee无线模块实现了实时监测电池运行状态的系统,该系统中的无线节点采集电池的电压、电流和温度等参数,并通过无线网络将这些数据发送到协调者,协调者转发给PC方。     

核辐射环境监测中的ZigBee技术研究

目前,我国的环境问题越来越多地显现出来,其中核辐射环境污染已经成为现在环境污染中的重要问题。环境监测水平的提高是保证避免核辐射污染的有效措施,因此,需要利用ZigBee无线技术实现ZigBee无线传感网络的区域环境核辐射监测系统的建立。文章通过对核辐射及环境监测的分析,对ZigBee技术在核辐射环境监测中的应用进行了分析。     

初烟仓储管理温湿度监测系统研究

采用新型温湿度采集器对烟垛内温湿度数据进行自动采集,通过无线传输、协议解析,建立温度模型分析确定数据采集点,并通过无线组网方式建立一套完整的初烟实时温湿度监测系统平台,形成一套集烟垛内温湿度数据存储、分析、预警等功能为一体的监测预警系统。     

基于ZigBee技术的串口通信系统的实现

ZigBee技术在无线传感器网络中通信距离相对短,且具有低成本、低功耗、建网可靠等特点.基于ZigBee技术在的应用设计实现了无线传感器网络数据通信节点,基于硬件平台的搭建,在IAR软件环境下将ZigBee协议栈嵌入ZigBee无线射频模块中,并且相互之间在程序控制下能完成无线数据传输.同时将发送数据和接收数据显示在串口调试助手上,并由LED显示当前的状态.系统实现了ZigBee无线模块间收发数据,实现串口传输由PC机显示.     

区域环境核辐射无线传感网络监测系统

为了满足某些区域特殊环境核辐射的监测需要,利用无线传感网络技术设计一种新颖的区域环境核辐射无线传感网络监测系统,实现测量数据和信息无线网络传输与处理,对核辐射参数及相应的环境参数进行实时、综合测量。该系统可以应用于涉核区域环境核辐射剂量的无线监测,能够将实测数据和辐射剂量的分布情况形象地显示在上位机图形界面上;具有数据无线传输与控制、数据储存、历史数据查询、节点的远程控制等多种功能。实验结果表明该系统具有功耗低、性能稳定、组网灵活、测量范围广等优点。     

区域环境核辐射无线传感网络监测系统

为了满足某些区域特殊环境核辐射的监测需要,利用无线传感网络技术设计一种新颖的区域环境核辐射无线传感网络监测系统,实现测量数据和信息无线网络传输与处理,对核辐射参数及相应的环境参数进行实时、综合测量.该系统可以应用于涉核区域环境核辐射剂量的无线监测,能够将实测数据和辐射剂量的分布情况形象地显示在上位机图形界面上;具有数据无线传输与控制、数据储存、历史数据查询、节点的远程控制等多种功能.实验结果表明该系统具有功耗低、性能稳定、组网灵活、测量范围广等优点.     

基于ZigBee无线传感器网络的消防报警系统

文章针对当今社会各楼宇内存在的重大火灾隐患,提出一种消防报警系统。该系统以基于ZigBee技术的无线传感器网络为基础设计系统的整体模型。各传感器对监测到的环境数据进行分析处理,通过无线传输将各信息传送给网关节点,网关节点再将信息传送给PC机（服务器）。PC机对整个网络系统进行控制,对所有数据进行综合处理,并将信息反馈给消防人员。     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

The Early History of the Cumulants and the Gram-Charlier Series

The early history of the Gram-Charlier series is discussed from three points of view: (1) a generalization of Laplace's central limit theorem, (2) a least squares approximation to a continuous function by means of Chebyshev-Hermite polynomials, (3) a generalization of Gauss's normal distribution to a system of skew distributions. Thiele defined the cumulants in terms of the moments, first by a recursion formula and later by an expansion of the logarithm of the moment generating function. He devised a differential operator which adjusts any cumulant to a desired value. His little known 1899 paper in Danish on the properties of the cumulants is translated into English in the Appendix.     

Capturing the Implications of Services Trade Liberalization

This paper evaluates the impact of service sector trade liberalization on the world economy by a ten-region, eleven-sector CGE model with import embodied technology transfer from developed countries to developing countries. Simulation results show that service sector trade liberalization not only directly affects world service production and trade, but also has significant implications for other sectors in the economy. The major channel of the impact is through inter-industry input-output relations and TFP growth induced from services imported by developing countries from developed countries, which may be embodied with new information and advanced technology.