نتایج جستجو برای: degree pattern

تعداد نتایج: 632798  

Journal: :CoRR 2005
Sergi Valverde Ricard V. Solé

– In a recent paper, Krapivsky and Redner [1] proposed a new growing network model with new nodes being attached to a randomly selected node, as well to all ancestors of the target node. The model leads to a sparse graph with an average degree growing logarithmically with the system size. Here we present compeling evidence for software networks being the result of a similar class of growing dyn...

Journal: :The Journal of experimental biology 2012
Adrian G Dyer David W Griffiths

Visual perception is a primary modality for interacting with complex environments. Recent work has shown that the brain and visual system of the honeybee is able, in some cases, to learn complex spatial relationships, while in other cases, bee vision is relatively rudimentary and based upon simple elemental-type visual processing. In the present study, we test the ability of honeybees to learn ...

Journal: :CoRR 2015
Yang Yang Jie Tang Yuxiao Dong Qiaozhu Mei Reid A. Johnson Nitesh V. Chawla

It is well-known that many networks follow a power-law degree distribution; however, the factors that influence the formation of their distributions are still unclear. How can one model the connection between individual actions and network distributions? How can one explain the formation of group phenomena and their evolutionary patterns? In this paper, we propose a unified framework, MD, to mo...

Journal: :bulletin of the iranian mathematical society 2013
z. du b. zhou

the reverse degree distance of a connected graph $g$ is defined in discrete mathematical chemistry as [ r (g)=2(n-1)md-sum_{uin v(g)}d_g(u)d_g(u), ] where $n$, $m$ and $d$ are the number of vertices, the number of edges and the diameter of $g$, respectively, $d_g(u)$ is the degree of vertex $u$, $d_g(u)$ is the sum of distance between vertex $u$ and all other vertices of $g$, and $v(g)$ is the ...

2008
Akira Nishikawa

Dispersal distance of planktonic larvae of coral reef organisms is influenced by their ecological characteristics and environmental factors such as current flow and physical structure of reefs. This study reviews the degree and pattern of genetic differentiation in scleractinian corals in the Ryukyu Archipelago, compared with other regions. Small-scale genetic heterogeneity, but broadscale homo...

2011
Mohammed Shafiqul Islam Md. Rafiqul Islam Mohammad Ashequr Rahman Pran Gopal Datta

Objectives: To assess the pattern and degree of hearing loss in CSOM. Methods: A prospective study was carried out from January, 2007 to December, 2008 at the department of Otolaryngology-Head & Neck Surgery, BSMMU, Dhaka This study included 150 cases with 198 ears of CSOM including both tubo-tympanic and attico-antral variety excluding intracranial complications if any. Results: There were 81....

2012
Ismail El-Hamamsy Karim Lekadir Iacopo Olivotto Ahmed El Guindy Robert Merrifield Luigi Rega GuangZong Yang Franco Cecchi Magdi H. Yacoub

Background The role of a tailored surgical approach for hypertrophic cardiomyopathy (HCM) on regional ventricular remodelling remains unknown. The aims of this study were to evaluate the pattern, extent and functional impact of regional ventricular remodelling after a tailored surgical approach. Methods From 2005 to 2008, 44 patients with obstructive HCM underwent tailored surgical intervention...

1999
Randi S. Cartmill

This study provides the first systematic examination of patterns of occupational sex segregation in less developed countries. I apply log-linear and log-multiplicative models to six-category occupational data from 44 nations to describe and explain the segregation patterns in both industrialized and less developed countries. These analyses indicate that segregation patterns are far more variabl...

Journal: :Journal of neurophysiology 2006
Robert J Gregor D Webb Smith Boris I Prilutsky

Unexpected changes in flexor-extensor muscle activation synergies during slope walking in the cat have been explained previously by 1) a reorganization of circuitry in the central pattern generator or 2) altered muscle and cutaneous afferent inputs to motoneurons that modulate their activity. The aim of this study was to quantify muscle length changes, muscle loads, and ground reaction forces d...

Journal: :Vision Research 2003
Matthew F. Gaffney William Hodos

The pattern electroretinogram (PERG) was used to measure the visual acuity and refractive state of nine American kestrels (Falco sparverius). Visual acuity was determined from psychometric functions of PERG amplitude vs. spatial frequency. Refractive state was measured by finding the trial lens that resulted in the highest acuity. All nine kestrels were found to be emmetropic. Their median visu...

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