Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions

The non-central Cu + Au collisions can create strong out-of-plane magnetic fields and in-plane electric fields. By using the HIJING model, we study the general properties of the electromagnetic fields in Cu + Au collisions at 200 GeV and their impacts on the charge-dependent two-particle correlator $\gamma_{q_1q_2}=$ (see main text for definition) which was used for the detection of the chiral magnetic effect (CME). Compared with Au + Au collisions, we find that the in-plane electric fields in Cu + Au collisions can strongly suppress the two-particle correlator or even reverse its sign if the lifetime of the electric fields is long. Combining with the expectation that if $\gamma_{q_1q_2}$ is induced by elliptic-flow driven effects we would not see such strong suppression or reversion, our results suggest to use Cu + Au collisions to test CME and understand the mechanisms that underlie $\gamma_{q_1q_2}$.Comment: V1: 7 pages, 8 figures. V2: Add 2 new figures. Published versio

My Father-like Professor Shi Zhengyi: The Pioneer of Chinese Ethnological Economics (Personal Story)

Professor Shi Zhengyi (1932-2015) was the same age as my father. In Chinese tradition, a teacher for a day is a father for life. Hence, I respectfully call Professor Shi my Father-like Professor. Born in Tongcheng County, Anhui Province, in 1932. Professor Shi graduated from the Master’s Program in History of Economics of the Department of Economics of Renmin University of China in 1957. As a renowned Chinese ethnographer and economist, he has been engaged in theoretical research and teaching economics and ethnology for a long time. With meticulous scholarship and profound knowledge, he has studied Chinese and Western cultures with countless new ideas for research.

Doctor of Philosophy

dissertationI have opted for a three-paper dissertation, studying the relationship between travel and the built environment for three types of trips: walk and bike trips by the entire population, trips from home to school and back for students, and trips of all types by the elderly. As part of my dissertation, I have gathered the most extensive set of regional travel surveys that anyone has ever collected, specifically including 815,160 trips by 81,056 households in 23 regions. I have also linked travel records to so-called D variables for buffers of different widths around households and routes from home to school. The five D variables, widely used in travel research, are development density, land use diversity, street network design or connectivity, destination accessibility, and distance to transit. The main goal of this dissertation is to determine how we can promote walking and biking, especially for students and seniors. From the first paper, walk mode choice in the 23 regions depends primarily on land use diversity, street connectivity, and transit accessibility, while bike mode choice depends primarily on street connectivity and transit accessibility. The resulting trip chain shows that accessibility of destinations to one another may be almost as important as accessibility of residences to destinations. The second paper analyzes student travel to school in the 14 regions. I find that the most important D variables in the decision to walk or bike to school is development density and street network design or connectivity, and the least important is land use diversity. While not a D variable exactly, the need to cross major roads or commercial developments has strong negative impacts on active travel to school. In the third paper, the analysis of variance (ANOVA) tests show that seniors living in compact neighborhoods are more active than those living in sprawl neighborhoods. They generally travel more and travel more by walking and public transportation, yet travel less by automobile. The resulting models and findings in this dissertation are appropriate for post-processing outputs of conventional travel demand models, and for sketch planning applications in traffic impact analysis, climate action planning, and health policy implementations

Design of Dual-band Branch-Line Coupler Based on Shunt Open-Circuit DCRLH Cells

In this article, the shunt open-circuit dual composite right/left-handed (DCRLH) cell is initially proposed and one dual-band branch-line coupler based on the proposed cells is designed. It is found that, compared with DCRLH cell, the frequency selectivity, matching condition and adjustment range of the shunt open-circuit DCRLH cell improve greatly. Moreover, the shunt open-circuit DCRLH cell exhibits two adjustable frequency points with -90degrees phase shift within its first two passbands. In order to explore this exotic property effectively, the influence of the primary geometrical parameter is investigated through parametric analysis. Thus, one dual-band branch-line coupler based on the shunt open-circuit DCRLH cells is designed. Both simulated and measured results indicate that comparative performance is achieved. Different from part of previous dual-band branch line couplers, for the proposed coupler, the signs of phase difference of two output ports within the two operating frequency bands are identical with each other. This branch-line coupler is quite suitable for the application which is sensitive to the variation of phase difference and its effective area is compact

Local Entanglement and quantum phase transition in spin models

Due to the phase interference of electromagnetic wave, one can recover the total image of one object from a small piece of holograph, which records the interference pattern of two laser light reflected from it. Similarly, the quantum superposition principle allows us to derive the global phase diagram of quantum spin models by investigating a proper local measurement. In the present paper, we study the two-site entanglement in the antifferomagnetic spin models with both spin-1/2 and 1. We show that its behaviors reveal some important information on the global properties and the quantum phase transition of these systems.Comment: 6 pages, 7 figure

Development of Marxist Economic Anthropology in the New Era: From Historical Materialism Perspectives

The thought of historical materialism founded by Marx has great guiding significance and far-reaching influence on the development of economic anthropology. This paper discusses Marxist economic anthropology’s ideological origin, development trend, schools, main viewpoints, and theoretical defects. It analyzes the enlightenment and guiding significance of Marxism on economic anthropology theory in terms of problem consciousness, research methods, and research objects, and combs out the research on some social development issues at the forefront of foreign economic anthropology theory, including the inequality of world development, the paradigm of “development” and unstable economy. Based on this, it makes a preliminary analysis of the development of Marxist economic anthropology from historical materialism perspectives in the new era

The Unique Contributions and the Unique Methodologies: A Concise Overview of the Applications of Business Anthropology

Anthropologists can make their great contributions to improve business operations. Business anthropology is a relatively new but fast growing subfield in anthropology and the business anthropologist is becoming a major occupation for anthropologists. This paper analyzes the roles that business anthropologists can play, the functions that anthropologists can have, and the contributions that anthropologists can make in the real business world. It suggests that by using specially developed research methods of anthropology, such as participant observation, informant interview, focus group, various survey techniques, and network analysis, business anthropologist can help business management to improve performance from product design to marketing strategies, from organizational change to consumer behavior studies, from domestic to international business development