1,724,937 research outputs found
The global gauge group structure of F-theory compactification with U(1)s
Full text linkAbstract We show that F-theory compactifications with abelian gauge factors generally exhibit a non-trivial global gauge group structure. The geometric origin of this structure lies with the Shioda map of the Mordell-Weil generators. This results in constraints on the u1 charges of non-abelian matter consistent with observations made throughout the literature. In particular, we find that F-theory models featuring the Standard Model algebra actually realise the precise gauge group [SU(3) × SU(2) × U(1)]/ℤ 6. Furthermore, we explore the relationship between the gauge group structure and geometric (un-)higgsing. In an explicit class of models, we show that, depending on the global group structure, an su2⊕u1 gauge theory can either unhiggs into an SU(2) × SU(2) or an SU(3) × SU(2) theory. We also study implications of the charge constraints as a criterion for the F-theory ‘swampland’
Measuring financial asset return and volatility spillovers : with application to global equity markets
Full text linkWe provide a simple and intuitive measure of interdependence of asset returns and/or volatilities. In particular, we formulate and examine precise and separate measures of return spillovers and volatility spillovers. Our framework facilitates study of both non-crisis and crisis episodes, including trends and bursts in spillovers, and both turn out to be empirically important. In particular, in an analysis of sixteen global equity markets from the early 1990s to the present, we find striking evidence of divergent behavior in the dynamics of return spillovers vs. volatility spillovers: Return spillovers display a gently increasing trend but no bursts, whereas volatility spillovers display no trend but clear bursts. JEL Classification: F30, G15, F3
Measuring Financial Asset Return and Volatility Spillovers, With Application to Global Equity Markets
Full text linkWe provide a simple and intuitive measure of interdependence of asset returns and/or volatilities. In particular, we formulate and examine precise and separate measures of return spillovers and volatility spillovers. Our framework facilitates study of both non-crisis and crisis episodes, including trends and bursts in spillovers, and both turn out to be empirically important. In particular, in an analysis of sixteen global equity markets from the early 1990s to the present, we find striking evidence of divergent behavior in the dynamics of return spillovers vs. volatility spillovers: Return spillovers display a gently increasing trend but no bursts, whereas volatility spillovers display no trend but clear bursts.Asset Market, Asset Return, Stock Market, Emerging Market, Market Linkage, Financial Crisis, Herd Behavior, Contagion
A study of Operation on Multi-author Blogs - A case study of TechSea Blog
No full textMulti-Author Blog is a kind of blog which is an important source of information on the internet. Unlike the Single-Author Blog that is managed by one author, two or more authors cooperate to write the Multi-Author Blog that becomes popular especially in the online community with the interest on Internet Communication Technology. However, there is none research about the Multi-Author Blog.
The aim of this research is to study the operation and management of the Multi-Author Blog. The author performed a case study and operated a Multi-Author Blog for seven months to approach the research purpose. For the case study, the author designed a field interview with the management team of \ue2TechOrange\ue2 that is a famous IT Multi-Author Blog in Taiwan in order to understand the related issues. For the implementation, the author built of a Multi-Author Blog named \ue2TechSea\ue2 and collected associated website data.
The research observed that the number of words in an article and the link to news have influences on the blog pageviews. In addition, the social media like Facebook helps to increase pageviews. Furthermore, the case study of TechOrange summarized the experiences and insights of the editorial team. The research results provide authors or managers of Multi-Author Blogs some answers about business operation of the online social media
Measuring financial asset return and volatility spillovers, with application to global equity markets
Full text linkThe authors provide a simple and intuitive measure of interdependence of asset returns and/or volatilities. In particular, they formulate and examine precise and separate measures of return spillovers and volatility spillovers. The authors framework facilitates study of both noncrisis and crisis episodes, including trends and bursts in spillovers, and both turn out to be empirically important. In particular, in an analysis of 19 global equity markets from the early 1990s to the present, they find striking evidence of divergent behavior in the dynamics of return spillovers vs. volatility spillovers: Return spillovers display a gently increasing trend but no bursts, whereas volatility spillovers display no trend but clear bursts.Assets (Accounting)
Measuring Financial Asset Return and Volatility Spillovers, With Application to Global Equity Markets
Full text linkWe provide a simple and intuitive measure of interdependence of asset returns and/or volatilities. In particular, we formulate and examine precise and separate measures of return spillovers and volatility spillovers. Our framework facilitates study of both non-crisis and crisis episodes, including trends and bursts in spillovers, and both turn out to be empirically important. In particular, in an analysis of nineteen global equity markets from the early 1990s to the present, we find striking evidence of divergent behavior in the dynamics of return spillovers vs. volatility spillovers: Return spillovers display a gently increasing trend but no bursts, whereas volatility spillovers display no trend but clear bursts.
[[alternative]]The Effects of Direct Instruction Model on Social Skills Teaching for Adolescents with Emotional and Behavioral Disorders
No full text[[abstract]]The Effects of Direct Instruction Model on Social Skills Teaching for
Adolescents with Emotional and Behavioral Disorders
Yen-Ling Lin
ABSTRACT
The purpose of this study was to explore the effects of Direct Instruction Model (DI) on Social Skills Teaching for Adolescents with Emotional and Behavioral Disorders (EBD). The single-subject multiple-probe design across behaviors was adopted in this study. Subjects were five EBDs with schizophrenia or mood disorders from Taipei City Psychiatric Center. Experiment lasted for eleven weeks, three times a week. Data were presented by graphic method and analyzed by using visual analysis method. Three instruments were self-edited " Social Skills Observation Checklists ", "Social Skills Improvement Scale "rated by the teachers and subjects, and " DI satisfaction inventory".
The main findings were as follows:
1. The visual analysis of the graphic data to the multiple-probe design demonstrated DI could increase five EBDs whole social skill performances, especially on peer-related social skills. Results showed that three of five EBDs who participated in all experiment performed better than the others.
2. The feedback from teachers differed from different social skill areas. Teachers all agreed the effects on peer-related social skill area were the best, but both self-related and specific situation social skills areas were not so significant.
3. From the self-rated scale by three EBDs who participated in whole experiment, the effects of social skills improvement were supported highly.
4. Also the three EBDs were satisfied with all facets of DI and had positive attitudes toward their performances.
Recommendations for the intervention and further studies were made based on the results and limitations of this study.
Keywords: direct instruction model; emotional and behavioral disorders;
social skills.
Supplemental material for An Optimizing Dynamic Spectrum Differential Extraction Method for Noninvasive Blood Component Analysis
No full textSupplemental Material for An Optimizing Dynamic Spectrum Differential Extraction Method for Noninvasive Blood Component Analysis by Wei Tang, Qiang Chen, Wenjuan Yan, Guoquan He, Gang Li and Ling Lin in Applied Spectroscopy</p
sj-pdf-1-imr-10.1177_03000605221109396 - Supplemental material for Confusing delayed hematemesis, unusual arterial hemorrhage after pancreaticoduodenectomy: a case report
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605221109396 for Confusing delayed hematemesis, unusual arterial hemorrhage after pancreaticoduodenectomy: a case report by Luna Wang, Gaoli Guo, Jianhua Yu, Ling Lin, Jianhui Yang and Baochun Lu in Journal of International Medical Research</p
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