1,760 research outputs found
Is \lq\lq Heavy Quark Damping Rate Puzzle'' in Hot QCD Really the Puzzle?
Within the framework of perturbative resummation scheme of Pisarski and
Braaten, the decay- or damping-rate of a moving heavy quark (muon) to leading
order in weak coupling in hot QCD (QED) is examined. Although, as is well
known, the conventionally-defined damping rate diverges logarithmically at the
infrared limit, shown is that no such divergence appears in the physically
measurable decay rate. The cancellation occurs between the contribution from
the \lq\lq real'' decay diagram and the contribution from the diagrams with
\lq\lq thermal radiative correction''.Comment: 13pages, OCU-PHYS-15
Finite-temperature reaction-rate formula: Finite volume system, detailed balance, limit, and cutting rules
A complete derivation, from first principles, of the reaction-rate formula
for a generic process taking place in a heat bath of finite volume is given. It
is shown that the formula involves no finite-volume correction. Through
perturbative diagrammatic analysis of the resultant formula, the
detailed-balance formula is derived. The zero-temperature limit of the formula
is discussed. Thermal cutting rules, which are introduced in previous work, are
compared with those introduced by other authors.Comment: 35pages (text) plus 4pages (figures
A new technique using a rubber balloon in emergency second trimester cerclage for fetal membrane prolapse
The definitive version is available at www.blackwell-synergy.comArticleJOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH. 34(6):935-940 (2008)journal articl
Dimensionality dependence of optical nonlinearity and relaxation dynamics in cuprates
Femtosecond pump-probe measurements find pronounced dimensionality dependence
of the optical nonlinearity in cuprates. Although the coherent two-photon
absorption (TPA) and linear absorption bands nearly overlap in both quasi-one
and two-dimensional (1D and 2D) cuprates, the TPA coefficient is one order of
magnitude smaller in 2D than in 1D. Furthermore, picosecond recovery of optical
transparency is observed in 1D cuprates, while the recovery in 2D involves
relaxation channels with a time scales of tens of picoseconds. The experimental
results are interpreted within the two-band extended Hubbard model.Comment: 10 pages, 4 figure
El valle en el cuenco. Cerámica desde el territorio. Distribución alternativa
El valle en el cuenco es un proyecto de investigación que estudia al Valle de Atemajac, sitio donde reside la actual Guadalajara y propone una práctica cerámica artesanal responsable que consiste en crear desde el entorno natural nativo. El proyecto surge del nombre del PAP, “Mirar la ciudad con otros ojos. Memorias e identidades”; en este caso, la ciudad de Guadalajara y el territorio del Valle de Atemajac se miran desde los ojos del ceramista. El corazón del proyecto reside en la búsqueda de resignificar y volver a dar valor al entorno y a los recursos naturales y al mismo tiempo, al oficio y a los procesos cerámicos. La metodología de desarrollo de proyecto consta de una investigación teórica y práctica que se va desenvolviendo en dos etapas. La primera etapa, que se lleva a cabo en el semestre actual, consiste en conocer el territorio y el quehacer cerámico que se desenvuelve en él, para posteriormente desarrollar un método artesanal cerámico que se basa en crear responsablemente desde los recursos naturales nativos del territorio, ahondando en los componentes del cuerpo y la superficie cerámica, en las características de los materiales naturales aplicables al quehacer cerámico, en la identificación, propiedades y procesamiento de los recursos naturales nativos para posteriormente, elaborar pastas, engobes, pátinas y esmaltes. La segunda etapa, que se desarrollará el siguiente semestre, radica en una investigación cerámica de carácter práctico que se enfoca en profundizar en los procesos y bondades que conlleva crear desde el entorno. En descubrir las posibilidades que ofrecen los recursos naturales nativos en el quehacer del ceramista. El desarrollo consiste en identificar y estudiar los recursos nativos del territorio que tienen una aplicación directa en el oficio del ceramista, en recolectar y procesar artesanalmente los materiales naturales nativos y, por último, realizar pruebas de pastas, esmaltes, engobes y pátinas en el taller, registrando y documentando los procesos y resultados. El proyecto busca concluir la investigación plasmando el paisaje del Valle de Atemajac en una serie de cuencos cerámicos con el sustento teórico y práctico del estudio del territorio y las pruebas cerámicas realizadas con la intención de crear un patrimonio artístico–natural–cultural que difunda la importancia de honrar la Tierra y los procesos humanos que provienen de ella.ITESO, A.C
Ventricular Tachycardia in Repaired Double Chambered Right Ventricle - Identification of the Substrate and Successful Ablation
A 35 year old female presented with recurrent ventricular tachycardia 5 years after she had undergone surgical repair of double chambered right ventricle. Electroanatomical mapping showed a localised scar in the apex with double potentials and good pace map. Ablation here resulted in non-inducibility of ventricular tachycardia. We hypothesise that the scarring in the apex is the result of sustained pressure overload and becomes arrhythmogenic similar to the apical scar in patients with mid-ventricular hypertrophic cardiomyopathy
PCR-based Landmark Unique Gene (PLUG) markers are a useful tool for comparative genomic analysis and BAC clone screening in wheat
Dissertação de mestrado em Psicologia Clínica e Saúde (Psicopatologia e Psicoterapia Dinâmica), apresentada à Faculdade de Psicologia e Ciências da Educação da Universidade de CoimbraOs pacientes infetados pelo VIH têm sido objeto de interesse por parte
dos profissionais de saúde mental pela dimensão do impacto psicológico do
diagnóstico, evolução da infeção e a vulnerabilidade destes sujeitos. Seja
como for, em traço de evolução da terapêutica, a infeção pelo vírus da
imunodeficiência humana (VIH) é, atualmente, uma doença tendencialmente
crónica.
Entre as perturbações mentais, a depressão é descrita como uma das
comorbidades mais frequentes nos indivíduos com VIH e que muitas vezes
passa despercebida. Acompanha-se de elevada morbilidade e apresenta um
impacto sócio-económico, sendo uma das causas mais frequentes de
suicídio. Para além da incapacidade que se vai instalando progressivamente,
os indivíduos são confrontados com o estigma social, carência de apoio
social e isolamento.
Neste sentido, este estudo foi realizado com o intuito de chamar a
atenção para a necessidade de intervenção psicoterapêutica com esta
população, através da exploração dos sintomas psicopatológicos mais
prevalentes (com especial destaque para a depressão e para a ideação
suicida), tendo em consideração a progressão da doença e a as caraterísticas
socio-demográficas.Patients infected with HIV have been the object of interest on the part
of mental health professionals due to the dimension of the psychological
impact of the diagnosis, the course of infection and the vulnerability of these
subjects. Anyway, in trait evolution of therapy, infection by the human
immunodeficiency virus (HIV) is currently a chronic disease.
Among mental disorders, depression is described as one of the most
frequent comorbidities in individuals infected with HIV and which often
goes unnoticed. It is accompanied by high morbidity and presents a socialeconomic
impact, being one of the most frequent causes of suicide. Beyond
the progressively established disability, individuals face social stigma, lack
of social support and isolation.
Thus, this study was conducted in order to draw attention to the need
for psychotherapeutic intervention among this population, through the
exploitation of the most prevalent psychopathological symptoms (with
special emphasis on depression and suicidal ideation), taking into account
the progression of this disease and the social-demographic characteristics
Density of States and Energy Gap in Andreev Billiards
We present numerical results for the local density of states in semiclassical
Andreev billiards. We show that the energy gap near the Fermi energy develops
in a chaotic billiard. Using the same method no gap is found in similar square
and circular billiards.Comment: 9 pages, 6 Postscript figure
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