Bounds for the mean residual life function of a <Emphasis Type="Italic">k</Emphasis>-out-of-<Emphasis Type="Italic">n</Emphasis> system

In the reliability studies, k-out-of-n systems play an important role. In this paper, we consider sharp bounds for the mean residual life function of a k-out-of-n system consisting of n identical components with independent lifetimes having a common distribution function F, measured in location and scale units of the residual life random variable X _t  = (X−t|X > t). We characterize the probability distributions for which the bounds are attained. We also evaluate the so obtained bounds numerically for various choices of k and n.     

京津冀区域空间格局及其优化整合分析

本文以京津冀区域空间结构为研究对象,从点、线、网络和域面四个基本空间要素入手,研究提升区域竞争力的空间整合规律.研究认为,京津冀区域人口和城镇体系的空间分布不均衡,一方面,以自然条件为基础,呈现东南集中特征,另一方面,中小城镇分布以京广、京九、京哈铁路等为依托,呈现以北京为中心的强向心分布;城镇带分布大体可划分为京广线...     

Quantities vs. prices: monopoly regulation without transfer under asymmetric demand information

Economics of Governance - This paper examines the optimal monopoly regulation without transfer based on Basso, Figueroa and Vásquez (Rand J Econ 48(3):557–578, 2017), which compare the...     

基于SE-DEA模型的广东城市物流效率评价分析

结合城市物流系统的特点,以民用汽车拥有量、通车里程和物流业从业人数为投入指标、地区生产总值和货物周转量为产出指标构建了城市物流效率评价指标体系,运用SE-DEA评价模型,以广东省21个主要城市为研究对象,对各城市物流系统的技术效率、纯技术效率、规模效率、超效率进行了对比分析,并提出了物流效率值相对较低的城市物流系统建设与改进建议。     

The impact of modern education in the Ouramant region of Iranian Kurdistan: a grounded study

Ouraman Takht is a rural, highly mountainous and dry region located in the southwest Kurdistan province of Iran. Traditionally, the socio-economic structure of the region was based on limited farming, herding, gardening, and manual labor. Recently, modern education has been introduced to the region. The purpose of this study was to explore, from the Ouraman perspective, the impact that modern educational practices have had on the Ouraman traditional way of life. Data were collected over a period of 6 months using ethnographic methods including observation, interview, videotaping, and photography. Data were analyzed using Grounded Theory Methodology. Enabling/Constraining was the concept constructed from data to explain the impact that modern education has on the Ouramat region. The people of Ouraman perceived modern education as increasing the economic stability and growth of the region while simultaneously threatening cultural beliefs and the traditional way of life. In addition to the “core” category of “Enabling/Constraining, 13 other major categories were derived from data. These included: job necessity, Providing Economic Prosperity, empowerment, increasing public knowledge, positive notion, concerns about religious beliefs, emphasis on children’s education, religious justifications, modernism requirements, traditional concerns, education for girls, expression of satisfaction, and public embracement. The results are presented in a paradigm model consisting of conditions, interactions and consequences around the core category and can be used to understand the impact of change from the introduction of modern education can have on a traditional society.     

Hybrid value creation: a systematic review of an evolving research area

This systematic review analyses literature on the work of hybrid value creation, i.e. the process of generating additional value by innovatively combining products (tangible component) and services (intangible component). A state of the art report on hybrid value creation is delivered by first systematically identifying and then analyzing 169 publications focusing on hybrid value creation. The identified publications are clustered into eight categories based on their links and interactions and thus a mapping of this evolving field is suggested. A discussion and reflection of the findings with respect to the pervasiveness of literature and the research methodologies used is provided. The paper concludes by identifying some dominant strategic gaps in the overall research landscape and provides directions for future research.