The static potential: lattice versus perturbation theory in a renormalon-based approach

We compare, for the static potential and at short distances, perturbation theory with the results of lattice simulations. We show that a renormalon-dominance picture explains why in the literature sometimes agreement, and another disagreement, is found between lattice simulations and perturbation theory depending on the different implementations of the latter. We also show that, within a renormalon-based scheme, perturbation theory agrees with lattice simulations.Comment: 18 pages, 11 figures, lattice data of Necco and Sommer introduced, references added, some lengthier explanations given, physical results unchange

Synchronization in driven versus autonomous coupled chaotic maps

The phenomenon of synchronization occurring in a locally coupled map lattice subject to an external drive is compared to the synchronization process in an autonomous coupled map system with similar local couplings plus a global interaction. It is shown that chaotic synchronized states in both systems are equivalent, but the collective states arising after the chaotic synchronized state becomes unstable can be different in these two systems. It is found that the external drive induces chaotic synchronization as well as synchronization of unstable periodic orbits of the local dynamics in the driven lattice. On the other hand, the addition of a global interaction in the autonomous system allows for chaotic synchronization that is not possible in a large coupled map system possessing only local couplings.Comment: 4 pages, 3 figs, accepted in Phys. Rev.

Racismo anti-negro en América Latina

En aquest article s'abordarà el fenomen de la racialització de la població africana i els seus descendents nascuts a Amèrica des d'una perspectiva sociohistòrica, entre aquests: el seu segrest, trasllat i esclavitud al continent americà durant el període colonial, així com la construcció d'imaginaris i narratives que van permetre la seva explotació, van afavorir el rebuig i la resistència davant l'abolició de l'esclavitud, i van excloure la població negra del procés de construcció dels emergents Estats-Nació llatinoamericans. La investigació indaga en el rol dels negres llatinoamericans en els processos independentistes i problematitza el fenomen del racisme estructural des d'una perspectiva sociològica crítica, com a factor per a l'aniquilament físic i simbòlic de la població negra i afrodescendent al passat i a l'Amèrica Llatina actual.This article address the racialization phenomenon of the African population and their descendants, born in America from a socio-historical perspective; including: their kidnapping, transfer and slavery in the American continent during the colonial period. Also the article address the construction of imaginaries and narratives that allowed their exploitation, favored rejection and resistance to the abolition of slavery, and excluded the black population from the process of construction of the emerging Latin American Nation-States. The research investigates the role of Latin American blacks in the independence processes and problematizes the phenomenon of structural racism from a critical sociological perspective, as a factor for the physical and symbolic annihilation of the black and Afro-descendant population in the past and in Latin America today.En el presente artículo se abordará el fenómeno de la racialización de la población africana y sus descendientes nacidos en América desde una perspectiva socio-histórica, entre estos: su secuestro, traslado y esclavitud en el continente americano durante el periodo colonial, así como, la construcción de imaginarios y narrativas que permitieron su explotación, favorecieron el rechazo y resistencia ante la abolición de la esclavitud, y excluyeron a la población negra del proceso de construcción de los emergentes Estados-Nación latinoamericanos. La investigación indaga en el rol de los negros latinoamericanos en los procesos independentistas y problematiza el fenómeno del racismo estructural desde una perspectiva sociológica crítica, como factor para el aniquilamiento físico y simbólico de la población negra y afrodescendiente en el pasado y en la América Latina actual

Inclusive Decays of Heavy Quarkonium to Light Particles

We derive the imaginary part of the potential NRQCD Hamiltonian up to order 1/m^4, when the typical momentum transfer between the heavy quarks is of the order of Lambda_{QCD} or greater, and the binding energy E much smaller than Lambda_{QCD}. We use this result to calculate the inclusive decay widths into light hadrons, photons and lepton pairs, up to O(mv^3 x (Lambda_{QCD}^2/m^2,E/m)) and O(mv^5) times a short-distance coefficient, for S- and P-wave heavy quarkonium states, respectively. We achieve a large reduction in the number of unknown non-perturbative parameters and, therefore, we obtain new model-independent QCD predictions. All the NRQCD matrix elements relevant to that order are expressed in terms of the wave functions at the origin and six universal non-perturbative parameters. The wave-function dependence factorizes and drops out in the ratio of hadronic and electromagnetic decay widths. The universal non-perturbative parameters are expressed in terms of gluonic field-strength correlators, which may be fixed by experimental data or, alternatively, by lattice simulations. Our expressions are expected to hold for most of the charmonium and bottomonium states below threshold. The calculations and methodology are explained in detail so that the evaluation of higher order NRQCD matrix elements in this framework should be straightforward. An example is provided.Comment: 61 pages, 9 figures. Minor change

Sampled Weighted Min-Hashing for Large-Scale Topic Mining

We present Sampled Weighted Min-Hashing (SWMH), a randomized approach to automatically mine topics from large-scale corpora. SWMH generates multiple random partitions of the corpus vocabulary based on term co-occurrence and agglomerates highly overlapping inter-partition cells to produce the mined topics. While other approaches define a topic as a probabilistic distribution over a vocabulary, SWMH topics are ordered subsets of such vocabulary. Interestingly, the topics mined by SWMH underlie themes from the corpus at different levels of granularity. We extensively evaluate the meaningfulness of the mined topics both qualitatively and quantitatively on the NIPS (1.7 K documents), 20 Newsgroups (20 K), Reuters (800 K) and Wikipedia (4 M) corpora. Additionally, we compare the quality of SWMH with Online LDA topics for document representation in classification.Comment: 10 pages, Proceedings of the Mexican Conference on Pattern Recognition 201

Fit to the Bjorken, Ellis-Jaffe and Gross-Llewellyn-Smith sum rules in a renormalon based approach

We study the large order behaviour in perturbation theory of the Bjorken, Ellis-Jaffe and Gross-Llewellyn-Smith sum rules. In particular, we consider their first infrared renormalons, for which we obtain their analytic structure with logarithmic accuracy and also an approximate determination of their normalization constant. Estimates of higher order terms of the perturbative series are given. The Renormalon subtracted scheme is worked out for these observables and compared with experimental data. Overall, good agreement with experiment is found. This allows us to obtain {\hat a}_0 and some higher-twist non-perturbative constants from experiment: {\hat a}_0=0.141\pm 0.089; f_{3,RS}(1 GeV)=-0.124^{+0.137}_{-0.142} GeV^2.Comment: 23 pages, 18 figures, one reference added, journal versio

EXPLORING CULTURAL FORMATION THROUGH COMMUNICATION PRACTICES IN EDUCATIONAL INSTITUTIONS: IDENTIFYING PRACTICES, OVERCOMING BARRIERS, AND IMPLEMENTING SOLUTIONS

The current paper focuses on the qualitative method used that examines the cultural formation in the educational institution, its practices, barriers, and solution. The use of qualitative research in this study reveals insights into how communication becomes an integral part of the culture-shaping process through its focus on the emerging themes and patterns developed over time. Among the methods used included a collection of notes and interviews from three generational participants; and an analysis of the Focus Discussion Group (FGD). FGD were classified on the nature of their inputs as indicated in the foreshadowed problems that seek to identify the characteristics of a culture-shaping process, experiences of communicators, and challenges encountered by members of the organizations in the aspect of behavior, satisfaction, and engagement. The obtained data demonstrate that organizational culture has a significant influence on the performance of the members. Many of the responses reflect the involvement of “cultured” individual perspectives that emerged from their daily work experiences and communication practices that leads to the formation of subgroups. Furthermore, the inclusion of the management, diversity of cultural backgrounds, and expectations also emerged. Based on the findings, the identified pieces of evidence in the approaches of both the management and members towards communicated rules policy have led to the formulation of a long-term sustainable adjustment in culture formation that mainly impacts motivation, communication, improving organizational values, decision-making, and solving conflicts.  Article visualizations

EFFECTIVENESS OF INTERNATIONAL GRADUATE PROGRAM OF BULACAN STATE UNIVERSITY: BASIS FOR PROGRAM ENHANCEMENT

The study dealt with the Effectiveness of International Graduate Programs at BSU as a Basis for Program Enhancement. The research aims to evaluate its purpose, and its standard as indicated by academic standards, such as standards of competence, service standards, and organizational standards. One of the primordial considerations of the Graduate School is its goal to produce balanced, competent, research-oriented, and globally competitive graduates. Thus, the researcher conceptualized the study; to accomplish the needed interactions with the officials and students of BSU – Hong Kong Lifelong Education Organization Limited; to unearth issues and modern trends, policies, and programs for BSU adoption to benefit the local students and; to initiate or trail- blazed foreign researches for the upliftment the Research and Extension Services of Department, where B.S.U. had fallen short during previous evaluation. The study used the descriptive, quantitative design using survey-questionnaire and interviews as the primary data-gathering instruments. Documented data on the demographic profile of students, number of graduates, and ranking of BSU Hong Kong were also utilized. The enrolled graduate students of BSU Hong Kong, faculty, and administrators of BSU Hong Kong were the respondents of the study.  Article visualizations