1,722,610 research outputs found
Simulation for quasi-geodesic in ASEP and speed changed ASEP
No full textThis repository contains the code to simulate ASEP and ASEPsc. Apart from the particle's position, it can also be used to simulate the endpoint of quasi-geodesic in both processes. A data set containing the results of one million trials is also provided
Numerical calculation for persistence probability of Airy1 process
No full textVia Bornemann's method (arxiv: 0804.2543), we provide a numerical calculation for persistence probability of Airy1 process
Critical fluctuations of the exponential last passage percolation with thick boundaries
No full textThose files contain a numerical implementation of the generalized Baik-Rains distribution and some other related materials
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gas phase acidity and proton affinity studies of organic species using mass spectrometry
No full textDNA bases can be chemically or photochemically damaged from a variety of endogenous and exogenous sources. Such damaged bases are linked to carcinogenesis, aging and cell death. One of our main focuses is to examine the intrinsic reactivity of normal and damaged nucleobases in order to find out how damaged bases are different from normal bases. Particularly in this thesis we are interested in the thermochemical properties (acidity and proton affinity) of damaged bases 1,N6-ethenoadenine (eA) and O6-methylguanine (OMG). eA is one of the damaged nucleobases which can be excised by alkyladenine DNA glycosylase (AAG) in humans. We find that the N9-H of eA is more acidic than adenine and guanine, which might indicate that AAG may cleave certain damaged nucleobases as anions and deprotonated damaged bases are better leaving groups than normal adenine and guanine. Also the active site may take advantage of a nonpolar environment to favor deprotonated eA as a better leaving group than adenine and guanine. In addition we find the N9-H of OMG is less acidic than adenine and guanine. This result is consistent with the fact that OMG is not one of the substrates of AAG. Besides the damaged bases, we also studied the thermochemical properties and tautomerism of normal pyrimidine bases cytosine and thymine, because the first step to understand how damaged bases differ from normal bases is to characterize the naturally occurring normal compounds. One of our focuses is gas phase acidity studies of organic silanols and some known hydrogen-bonding organocatalysts. This project is in collaboration with Professor Annaliese Franz at UC Davis, who develops a series of organic silanols used as a new class of hydrogen bonding catalysts for enantioselective carbon-carbon bond forming reactions. It is generally accepted that silanols are more acidic than their carbon analogs, but we have found the theoretical carbon diol analogs are actually more acidic than silicon diols depending on substitution and structure. Also polarizability versus induction, gas phase versus solution phase, catalysis and molecular recognition are discussed. We are also interested in the proton affinity and reactivity of N-heterocyclic carbenes (NHCs). Stable NHCs are widely used as novel ligands for transition-metal-catalyzed reactions such as the Grubbs ruthenium olefin metathesis catalysis, palladium-catalyzed cross-coupling reactions and nickel-catalyzed cycloadditions. The dialkylimidazolium salts (protonated carbenes) are also an important class of ionic liquids, which are used as “green” nonvolatile solvents in organic synthesis. It has been found that the second generation of Grubbs metathesis catalyst comprising NHC is more active than the first generation catalyst containing tricyclohexyl phosphine (PCy3) only. More basic carbenes presumably will be more effective ligands. Therefore we are interested in the proton affinity of carbenes versus PCy3. By using the Cooks kinetic method we find both di-methyl carbene and ethyl methyl carbene have similar proton affinities to PCy3. However bracketing experiments conducted on a modified LCQ show that di-methyl carbene and ethyl methyl carbene are more basic than PCy3. This inconsistence is probably due to a technical problem with the Cooks method or ethylene elimination for the ethyl methyl carbene and PCy3 system during the Cooks experiments. Proton-bound dimers of carbenes and PCy3 are also found to exhibit interesting reactivity involving ethylene elimination, phosphine alkylation and/or cyclohexene elimination.Ph. D.Includes bibliographical referencesIncludes vitaby Min Li
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Migration, prostitution and human trafficking Chinese migrant women in Shenzhen, China
No full textChina has gone through a wide-ranging transformation in the last three decades since the Chinese government initiated economic reform and an open-door policy. A series of reform strategies, while producing an economic miracle in China, has, however,
resulted in myriad social problems. The resurgence and prevalence of prostitution is one of these. Rarely have there been any attempts to explore prostitution in relation to human trafficking. This study tries to explore questions such as whether Chinese women in the
sex sector are victims of trafficking, what are the factors causing Chinese women to get involved in prostitution or become victims of trafficking, how authorities respond to these issues in terms of laws and policies, and so on. This study was conducted in Shenzhen — China’s best known boomtown since the 1980’s, where many sex establishments involving internal migrants have been set up. Guided by qualitative methodological approach, a total of sixty-four interviews were conducted: forty with women working in sex venues, nine with sex-ring operators, and fifteen with law enforcement officers. Eight field observations were also completed. Participants included women practicing prostitution in four types of sex venues: nightclubs and karaoke lounges; massage parlors; hair salons; and the street. A variety of factors relating to women’s involvement in prostitution were discovered. Different paths to prostitution were identified and described. Six out of forty women were identified as trafficking victims. The organization and operation of sex venues and the life of women on the “job” were examined. In addition, China’s responses to the expanding sex industry were analyzed in terms of law and administrative regulations, as well as policies. The ineffectiveness of campaign-style policy and reasons
for its failure to contain prostitution were also explored. While this study helps improve our knowledge and understanding of prostitution and sex trafficking in contemporary China and provides information for the Chinese authorities on the nature, magnitude, and gravity of these problems, some issues emanating from this study remain unanswered, such as the definition of terms such as exploitation, coercion, or forced work which are key elements in defining human
trafficking.Ph.D.Includes abstractVitaIncludes bibliographical referencesby Min Li
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