Results 61 to 70 of about 71,117 (287)

Close-Binary and Pulsating Central Stars [PDF]

Symposium - International Astronomical Union, 1989
As a result of photometric-monitoring studies, 7 planetary-nebula nuclei are now known to be binaries with orbital periods less than one day. These systems were probably produced via a common-envelope interaction, during which a wide pair was converted to a close binary surrounded by an ejected red-giant envelope.
openaire   +1 more source

Current Flow Group Closeness Centrality for Complex Networks? [PDF]

The World Wide Web Conference, 2019
Current flow closeness centrality (CFCC) has a better discriminating ability than the ordinary closeness centrality based on shortest paths. In this paper, we extend this notion to a group of vertices in a weighted graph, and then study the problem of finding a subset $S$ of $k$ vertices to maximize its CFCC $C(S)$, both theoretically and ...
Li, Huan, Peng, Richard, Shan, Liren, Yi, Yuhao, Zhang, Zhongzhi   +4 more
openaire   +2 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Graph manipulations for fast centrality computation [PDF]

, 2014
The betweenness and closeness metrics have always been intriguing and used in many analyses. Yet, they are expensive to compute. For that reason, making the betweenness and closeness centrality computations faster is an important and well-studied problem.
Catalyurek, Umit V., Kaya, Kamer, Sariyuce, Ahmet Erdem, Sarıyüce, Ahmet Erdem, Saule, Erik, Çatalyürek, Ümit V.   +5 more
core  

The Strength of Direct Ties: Evidence from the Electronic Game Industry [PDF]

, 2010
We analyze the economic effects of a developer’s connectedness in the electronic game industry. Knowledge spillovers between developers should be of special relevance in this knowledge-based industry. We calculate measures for a developer’s connectedness
Claussen, Jörg, Falck, Oliver, Grohsjean, Thorsten   +2 more
core   +4 more sources

Unitary Steinberg group is centrally closed [PDF]

St. Petersburg Mathematical Journal, 2013
This paper shows that the unitary Steinberg group of a form ring is centrally closed. This was proved by Bak who used matrix entries; the current proof, using roots to classify Steinberg relations among elementary unitary transvections, is shorter and somewhat simpler. Let \(R\) be an associative ring with involution.
openaire   +1 more source

Exploration on neurobiological mechanisms of the central–peripheral–central closed-loop rehabilitation

Frontiers in Cellular Neuroscience, 2022
Central and peripheral interventions for brain injury rehabilitation have been widely employed. However, as patients’ requirements and expectations for stroke rehabilitation have gradually increased, the limitations of simple central intervention or peripheral intervention in the rehabilitation application of stroke patients’ function have gradually ...
Jie Jia, Jie Jia, Jie Jia, Jie Jia, Jie Jia   +4 more
openaire   +3 more sources

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

The diplomat's dilemma: Maximal power for minimal effort in social networks

, 2008
Closeness is a global measure of centrality in networks, and a proxy for how influential actors are in social networks. In most network models, and many empirical networks, closeness is strongly correlated with degree.
A Barrat, D Kahneman, D Knoke, DJ Watts, G Ehrhardt, G Sabidussi, K Lindgren, K Nakao, LM Valen van, M Nowak, M Rosvall, M Rosvall, M Weber, MA Nowak, MEJ Newman, MO Jackson, P Erdős, P Holme, P Holme, P Holme, PW Holland, R Albert, R Axelrod, S Gila, SN Dorogovtsev, T Gross, V Bala   +26 more
core   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source