Results 41 to 50 of about 3,619,752 (232)

Stretching the Horizon of a Higher Dimensional Small Black Hole [PDF]

open access: yes, 2005
There is a general scaling argument that shows that the entropy of a small black hole, representing a half-BPS excitation of an elementary heterotic string in any dimension, agrees with the statistical entropy up to an overall numerical factor.
Sen, Ashoke
core   +2 more sources

Extraction of the underlying structure of systematic risk from non-Gaussian multivariate financial time series using independent component analysis: Evidence from the Mexican stock exchange [PDF]

open access: yes, 2018
Regarding the problems related to multivariate non-Gaussianity of financial time series, i.e., unreliable results in extraction of underlying risk factors -via Principal Component Analysis or Factor Analysis-, we use Independent Component Analysis (ICA ...
Ladrón de Guevara Cortés, Rogelio   +2 more
core   +2 more sources

The mathematical pathogenetic factors analysis of acute inflammatory diseases development of bronchopulmonary system among infants

open access: yesZaporožskij Medicinskij Žurnal, 2017
The purpose. To study the factor structure and to establish the associative interaction of pathogenetic links of acute diseases development of the bronchopulmonary system in infants.Materials and methods.
G. O. Lezhenko   +3 more
doaj   +1 more source

Statistical analysis of factor models of high dimension

open access: yes, 2012
This paper considers the maximum likelihood estimation of factor models of high dimension, where the number of variables (N) is comparable with or even greater than the number of observations (T). An inferential theory is developed. We establish not only
Bai, Jushan, Li, Kunpeng
core   +1 more source

Understanding and Improving the Wang-Landau Algorithm [PDF]

open access: yes, 2005
We present a mathematical analysis of the Wang-Landau algorithm, prove its convergence, identify sources of errors and strategies for optimization. In particular, we found the histogram increases uniformly with small fluctuation after a stage of initial ...
B. J. Schulz   +2 more
core   +1 more source

The prognostication of development of respiratory tract bacterial diseases for children of early age

open access: yesPatologìâ, 2019
The purpose of this study was definition of influence of the modified factors in development of acute pneumonia in children of early age and development of the method of prognostication of disease development. Materials and methods.
H. O. Lezhenko   +2 more
doaj   +1 more source

Underlying construct of empathy, optimism, and burnout in medical students. [PDF]

open access: yes, 2015
OBJECTIVE: This study was designed to explore the underlying construct of measures of empathy, optimism, and burnout in medical students. METHODS: Three instruments for measuring empathy (Jefferson Scale of Empathy, JSE); Optimism (the Life Orientation ...
Cohen, Mitchell   +4 more
core   +3 more sources

Patterns of anxiety symptoms in toddlers and preschool-age children: Evidence of early differentiation [PDF]

open access: yes, 2012
The degree to which young children’s anxiety symptoms differentiate according to diagnostic groupings is under-studied, especially in children below the age of 4 years.
Briggs-Gowan, Margaret J.   +3 more
core   +3 more sources

Statistical analysis for the Q‐factor of twin kHz QPOs [PDF]

open access: yesAstronomische Nachrichten, 2012
AbstractUsing the recently published data of twin kHz quasi‐period oscillations (QPOs) in neutron stars of low‐mass X‐ray binaries (LMXBs), we study the different profiles between bright Z sources and less luminous Atoll sources. The quality factors of upper kHz QPOs show a narrow distribution both for Z sources and Atoll sources, which concentrate at ...
Wang, Jing   +4 more
openaire   +2 more sources

External Validation and Comparison of Current Scoring Systems in Encrusted Ureteral Stent Management: a Multicenter Study [PDF]

open access: yesInternational Brazilian Journal of Urology
Purpose: To compare the external validation of four existing scoring systems for encrusted ureteral stents (EUS) and their relationship with stent indwelling time, stone-free rates, multiple surgery sessions, multimodal procedures, and prolonged ...
Mert Hamza Özbilen   +11 more
doaj   +1 more source

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