CRTS Ⅰ型无砟轨道板预制技术

结合板式无砟轨道技术的引进、消化、吸收及无砟轨道板预制施工的实践，介绍了CRTS Ⅰ型无砟轨道板预制技术，并总结出了无砟轨道板预制施工的质量控制要点。     

岔区板式无砟轨道自密实混凝土施工控制技术浅析

通过对京沪高速铁路路基上岔区板式无砟轨道道岔板充填层自密实泪凝土灌注施工技术的研究,从自密实混凝土的配制、运输、灌注等施工技术入手,提出了优化方案及质量控制要点.     

CRTSII型板式无砟轨道底座板更换方案

一．方案实施背景 CRTSⅡ型板式无砟轨道已按支承层施工，CRTSⅡ型板式无砟轨道起点处未设置钢筋混凝土底座板。由于路基地段CRTSⅡ型板式无砟轨道的轨道板为纵向连续结构，轨道板与下部结构之间的连接需要充分考虑轨道板纵连后由于温度变化产生的温度力及运营后的制动力、起动力等纵向作用力和列车振动对轨道结构的影响，为确保高速铁路运营安全，需要在CRTSⅡ型板式无砟轨道端部补设一个钢筋混凝土底座板，确保结构安全。     

浅谈CRTSⅡ型板式无砟轨道轨道板施工质量控制

CRTSⅡ型板式无砟轨道是高速铁路常用的无砟轨道之一,其轨道板的质量直接影响高速铁路的运营安全和日常维护投入。本文针对该型无砟轨道的轨道板铺设、轨道板精调、CA砂浆灌注、轨道板张拉连接等工序,列举了施工中CRTSⅡ无砟轨道施工中较为突出的的质量问题,以及笔者在京沪高铁施工期间采用的质量控制方法,从实际施工的角度出发,对CRTSⅡ型轨道板质量控制要点以及措施进行了阐述。以供参考。     

高速铁路桥梁CRTSⅢ型板式无砟轨道施工技术应用

CRTSⅢ型板式无砟轨道是我国自主研发的一种新型无砟轨道,新建郑徐铁路客运专线开兰特大桥无砟轨道采用CRTSⅢ型板式无砟轨道施工技术,通过工程实践简要介绍CRTSⅢ型板式无砟轨道施工技术施工关键环节,常见问题及处理措施。     

沪宁城际铁路CRTSⅠ型板式无砟轨道的铺设

以沪宁城际铁路某标段CRTSⅠ型板式无砟轨道的铺设为工程背景,介绍CRTSⅠ型板式无砟轨道铺设工作中CPIII控制网测设、钢筋混凝土底座与凸型挡台的施工、轨道板铺装和凸台树脂灌注袋铺设等主要工序的施工工艺。     

沪宁城际铁路CRTS I型板式无砟轨道的铺设

以沪宁城际铁路巢标段CRTS I型板式无砟轨道的铺设为工程背景,介绍CRTS I型板式无砟轨道铺设工作中CPⅢ控制网测设、钢筋混凝土底座与凸型挡台的施工、轨道板铺装和凸台树脂灌注袋铺设等主要工序的施工工艺.     

高速铁路CRTS Ⅲ型板式无砟轨道施工技术研究

高速铁路能够安全运行,高速列车能够既快又稳,关键核心技术之一就是轨道设计。线下工程的作用都是为了满足轨道结构的要求,并最终反映到轨道结构上。因此轨道结构是所有基础工程中的关键部分。由于轨道结构直接跟车轮接触,所以其直接关系到高速列车的安全和平稳运行。因此轨道结构对各项工作要求很高,任何微小的差错都可能是致命的。CRTSⅢ型板式无砟轨道是我国自主研发并具有完全自主知识产权的无砟轨道结构形式。GRTSⅢ型板式无砟轨道作为一种新型的无砟轨道结构,在郑徐铁路上已经成功铺设,本文主要研究GRTSⅢ型板式无砟轨道从布板、自密实混凝土充填层施工到精调及施工中常见的质量问题进行研究。     

客运专线CRTSⅢ型板式无砟道床施工技术

CRTSⅢ型板式无砟轨道作为具有我国完全自主知识产权的无砟轨道结构,已经在国内多条客运专线铁路建设中应用,CRTSⅢ型板式无砟轨道具有工艺简单,性能稳定,成本低,节省投资等优点,逐渐在国内取代了CRTSⅠ型、Ⅱ型板式无砟轨道。本文以郑徐客专某标段CRTSⅢ型板式无砟道床施工为依托,详细介绍了CRTSⅢ型板式无砟道床结构、施工工艺、物流组织和质量控制要点,为类似工程项目提供借鉴。     

CRTSI型板式无砟轨道水泥乳化沥青砂浆施工技术

水泥乳化沥青砂浆简称CA砂浆,是无砟轨道的关键部位,是板式轨道中轨道板与混凝土底座之间的充垫层,是一种新型有机无机复合材料,是轨道结构必不可少的弹性减振关键材料之一,在我国高铁建设中得到了越来越多的应用。文章论述了CRTSI型板式无砟轨道水泥乳化沥青砂浆施工技术要点。     

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.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.