6,153 research outputs found
JSe_supple - Running With a Mask? The Effect of Air Pollution on Marathon Runners’ Performance
No full textJSe_supple for Running With a Mask? The Effect of Air Pollution on Marathon Runners’ Performance by Mengmeng Guo, and Shihe Fu in Journal of Sports Economics</p
LA CROISSANCE URBAINE CHINOISE RECONSIDÉRÉE
No full textOver the last decade, many researchers have focused on the study of different urban hierarchies and their evolution over time. These studies may or may not confirm Zipf’s law and emphasize the characteristics of urban growth. The question is then whether urban growth depends upon city-size or not, which is a main issue in modern regional economics. Using data on Chinese cities for the period 1960-2000, this paper aims to provide some answers to this question which has led to a recent passionate debate between the random growth theories and the endogenous growth theories.CROISSANCE URBAINE, HIÉRARCHIES URBAINES, LOI DE ZIPF, URBANISATION CHINOISE, AGGLOMÉRATION, LOI DE GIBRAT
Testing Urbanization Economies in Manufacturing Industries: Urban Diversity or Urban Size?
No full textWhether urbanization economies stem from urban diversity or urban scale is not clear in the literature. This paper uses the 2004 China manufacturing census data and tests simultaneously the effects of urban size and industrial diversity on firm productivity, controlling for localization economies and human capital externalities. We find that productivity increases with city size—but at a diminishing rate, and the city size effect becomes negative for cities with population over two million. Firms also benefit from industrial diversity, and the strength of such benefit increases with city size but decreases with firm size. The characteristics of agglomeration economies in a transition economy are also discussed.Urbanization economies; Industrial diversity; Jacobs externalities; City size.
Wage Premia in Employment Clusters: How Important is Worker Heterogeneity?
No full textThis paper tests whether the correlation between wages and the spatial concentration of employment can be explained by unobserved worker productivity differences. Residential location is used as a proxy for a worker's unobserved productivity, and average workplace commute time is used to test whether location-based productivity differences are compensated away by longer commutes. Analyses using confidential data from the 2000 Decennial Census Long Form find that the agglomeration estimates are robust to comparisons within residential location and that the estimates do not persist after controlling for commuting costs suggesting that the productivity differences across locations are not due to productivity differences across individuals.Agglomeration, Wages, Sorting, Locational Equilibrium, Human Capital Externalities
Fu Describing About the Author Himself: A Focus on Ban Gu "You tong fu"
No full textFrom Later Han dynasty onwards, the number of fu describing about the author himself has increased. There are several possible reasons for this, but the most important reason is probably that there was no other genre through which one could express oneself except for fu in this period. For instance, the fiveword poetry was still in the middle way of establishing its own style at that moment. Moreover, in Former Han, there were few opportunities for authors to talk about themselves in detail in fu, because the main readers were emperors and kings of countries. In Later Han, the readers had become more diverse. That is probably the reason why more fu began to mention about the authors themselves in this period. Ban Gu (32-92), who is a representative scholar of Later Han and also a man of letters, expressed his aim by writing "You tong fu". Its main content is that though one's encounter with a disaster or felicity is not always derived from our behavior, we have to have a strong will and take action to overcome disasters. This idea is supported by Ban Gu's experiences of not attaining his aim. Such experiences are common in Chinese authors. One of the earliest examples is Chu Ci. Also, Chu Ci is the one of the origins of fu. It is surprising that authors expressed things about themselves mostly in fu describing journeys. It may be easier to understand this tendency if we think they substituted the heaven wander in Chu Ci with a ground journey. Chu Ci was a model for authors to express their aim which could not come true, even if the journey on the ground and the wander in heaven are different
Factory benefits to paying workers more: The critical role of compensation systems in apparel manufacturing
No full textWhile many stakeholders believe worker wages in global supply chains are too low, there is disagreement about what, if anything, can be done to raise wages. Through a two-year quasi-experiment in an operating apparel factory, we assess the effects on productivity and profits of raising worker wages with a re-designed compensation system. We show that, even within current factory margins and constraints, important wage gains (4.2–9.7%) are possible and profitable. Productivity increased 8–10%-points while turnover decreased markedly. Workers were motivated by the potential for increased wages from an accelerating group rate as well as increased engagement and sense of fair compensation. Workers focused their increased effort on reducing quality defects and tardiness, two behaviors which individual workers largely control. Additional productivity-increasing behaviors were constrained by skill, position, and conflicts arising from free riders. Advanced apparel manufacturing demands a more engaged workforce; this research provides early evidence that compensation systems can be a critical tool to meet multiple needs.</div
Skill-driven recommendations for job transition pathways
No full textJob security can never be taken for granted, especially in times of rapid, widespread and unexpected social and economic change. These changes can force workers to transition to new jobs. This may be because new technologies emerge or production is moved abroad. Perhaps it is a global crisis, such as COVID-19, which shutters industries and displaces labor en masse. Regardless of the impetus, people are faced with the challenge of moving between jobs to find new work. Successful transitions typically occur when workers leverage their existing skills in the new occupation. Here, we propose a novel method to measure the similarity between occupations using their underlying skills. We then build a recommender system for identifying optimal transition pathways between occupations using job advertisements (ads) data and a longitudinal household survey. Our results show that not only can we accurately predict occupational transitions (Accuracy = 76%), but we account for the asymmetric difficulties of moving between jobs (it is easier to move in one direction than the other). We also build an early warning indicator for new technology adoption (showcasing Artificial Intelligence), a major driver of rising job transitions. By using real-time data, our systems can respond to labor demand shifts as they occur (such as those caused by COVID-19). They can be leveraged by policy-makers, educators, and job seekers who are forced to confront the often distressing challenges of finding new jobs
Online Iterative Adaptive Dynamic Programming Approach for Solving the Zero-Sum Game for Nonlinear Continuous-Time Systems with Partially Unknown Dynamics
No full textThe current study presents an online iterative adaptive dynamic programming approach to resolve the zero-sum game (ZSG) for nonlinear continuous-time (CT) systems containing a partially unknown dynamic. The Hamilton-Jacobian-Issacs (HJI) equation is solved along the state trajectory according to the value function approximation and the policy improvement online. Relaxed dynamic programming is utilized to ensure the algorithm’s convergence. Model and costate networks were established to conduct the method. Computational simulations are performed to present the efficiency of the algorithm.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Control & Simulatio
Note of congratulations from Jack Huang to Dr. Frank Fu, January 1, 1983
No full textA note of congratulations to Dr. Frank H. Fu (Fu Haojian) from Springfield College Alum, Jack Huang, Class of 1936, dated January 1, 1983. The card has country lane scene on the front, with a tree with pink leaves, a buttfly, and a tree with its leaves still green. There is the roof of a house just visible over the hill. It also says Congratulations. Inside is short message.Mr. Huang wrote a short personal note congratulating him for his efforts and the recent recognition by then President Ronald Reagan, or the actor as he refers to him, and saying how proud the Chinese are of him. An author of 17 textbooks and more than 100 journal articles, Frank H. Fu, G’73, DPE’75, has worked across the world in China, Canada, and the United States. Throughout his career, he has received many distinguished honors, including the Medal of Honor in 2009 by the SAR Government of Hong Kong.
Fu has held positions at institutions such as the Chinese University of Hong Kong and Springfield College, where he served as director of the International Center starting in 1978. Five years later, Fu returned to Hong Kong, but has since remained actively involved with Springfield College, participating in talks on the campus and even hosting a gathering of nearly 60 alumni in Hong Kong.
Currently, Fu is the associate vice president of Hong Kong Baptist University, where he also works as the director of the Dr. Stephen Hui Research Centre of Physical Recreation and Wellness. In addition, Fu is president of the Society of Chinese Scholars on Exercise Physiology and Fitness, chairperson of Hong Kong Coach Education Committee, a research fellow of the Research Consortium of SHAPE America, and an international fellow of the National Academy of Kinesiology
Practical application of on-line partial discharge monitoring technique on 500kV shunt reactor
No full textConsidering the damage mechanism of oil-impregnated paper insulation in power transformers, shunt reactors and other high voltage electrical apparatus caused by partial discharge, a concept of “destructive partial discharge” is introduced in this paper. The intensity of this discharge is regarded as several thousands pico-coulomb (pC) and may cause the insulation a fatal damage. An oil-paper insulation is usually able to withstand this type of partial discharge for a period of time prior to failure. This provides engineers a time window to detect it. This paper describes an on-line partial discharge monitoring system for 500kV shunt reactors. The commission results from 3 single-phase shunt reactors either connected or disconnected to the grid showed that the on-line partial discharge detecting system has a high noise immunising ability. Two years later after the installation, a pre-warning signal was received from one shunt reactor indicating the existence of an intermittent discharge. The acoustic emission system located its position at the low end of the high voltage bushing in the oil. Dissolved gasses analysis (DGA) in the oil suggested the presence of partial discharge, as acetylene (C2H2) was as high as 20ppm. PD activity was further confirmed by a physical examination on the reactor
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