Results 61 to 70 of about 93,605 (270)

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Modelando la distribución del número de co-autores por artículo Modeling the distribution of co-authorships by paper

Investigación Bibliotecológica: Archivonomía, Bibliotecología e Información, 2011
Este artículo explora la modelación del número de autores que colaboran en la publicación de un artículo. Con ese fin se analizaron la distribución geométrica, la distribución Poisson truncada, la distribución Poisson lognormal y la distribución Gauss ...
Rubén Urbizagástegui Alvarado, Cristina Restrepo Arango   +1 more
doaj  

The Lognormal Distribution Is Characterized by Its Integer Moments

Mathematics
The lognormal moment sequence is considered. Using the fractional moments technique, it is first proved that the lognormal has the largest differential entropy among the infinite positively supported probability densities with the same lognormal-moments.
Pier Luigi Novi Inverardi, Aldo Tagliani
doaj   +1 more source

The two states of Sgr A* in the near-infrared: bright episodic flares on top of low-level continuous variability

, 2010
In this paper we examine properties of the variable source Sgr A* in the near-infrared (NIR) using a very extensive Ks-band data set from NACO/VLT observations taken 2004 to 2009.
A. Goldwurm, Baganoff, Chan, D. Porquet, Dexter, Ding, Do, Do, Dodds-Eden, Dodds-Eden, Eisenhauer, F. Eisenhauer, F. Yusef-Zadeh, G. Bower, G. Trap, Ghez, Ghez, Gillessen, Gillessen, Goldston, H. Bartko, Hornstein, Hornstein, K. Dodds-Eden, Lyubarskii, Meyer, Meyer, O. Pfuhl, R. Genzel, Rank, Reid, S. Gillessen, S. Trippe, T. K. Fritz, T. Ott, Tokunaga, Yuan, Yusef-Zadeh, Yusef-Zadeh, Özel   +39 more
core   +3 more sources

Data‐driven analysis of the spatial dependence of grouting efficiency during tunnel excavation

Deep Underground Science and Engineering, EarlyView.
Prediction of grouting efficiency using machine learning is enhanced by adopting a training strategy that accounts for the grouting process across multiple rounds. Abstract Grouting with water–cement mixtures is the most widely used and cost‐effective method for managing excess water inflow during tunnel construction.
Huaxin Liu, Xunchang Fei, Wei Wu
wiley   +1 more source

Preconfigured, Skewed Distribution of Firing Rates in the Hippocampus and Entorhinal Cortex

Cell Reports, 2013
Despite the importance of the discharge frequency in neuronal communication, little is known about the firing-rate patterns of cortical populations. Using large-scale recordings from multiple layers of the entorhinal-hippocampal loop, we found that the ...
Kenji Mizuseki, György Buzsáki
doaj   +1 more source

GZK cutoff distortion due to the energy error distribution shape

, 2006
The observed energy spectrum of ultra high energy cosmic rays (UHECR) is distorted by errors in the energy reconstruction. Here we show that if the shape of the error distribution is lognormal, the high end of the cosmic ray spectrum will be distorted ...
Albuquerque, Ivone F. M., Smoot, George F.   +1 more
core   +2 more sources

Random finite element analysis on ground subsidence caused by tunnel excavation in karst regions with spatial variable soil

Deep Underground Science and Engineering, EarlyView.
This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su, Yong Fu, Miaomiao Sun, Kailin Ding, Ying Zhao   +4 more
wiley   +1 more source

On the Shifted Hybrid Log-Normal Distribution

Statistica
The log-normal distribution is widely used to model positive valued data in many areas of applied research. However, sometimes the log-normal distribution does not completely satisfy the fitting expectations in every real life situations.
Damodaran Santhamani Shibu, Soman Latha Nitin, Muhammed Rasheed Irshad   +2 more
doaj   +1 more source

The Prevention of Eating Disorders in Australian Adolescents: A Modeled Cost‐Effectiveness Study

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Prevention programs for eating disorders (EDs) have the potential to reduce the onset of these diseases and improve the mental health and well‐being of the general population. However, there is mixed evidence on whether routine implementation of such programs at the population level is cost‐effective.
Long Khanh‐Dao Le, Eng Joo Tan, Phillipa Hay, Jaithri Ananthapavan, Yong Yi Lee, Cathrine Mihalopoulos   +5 more
wiley   +1 more source