Results 271 to 280 of about 1,319,186 (317)
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The American Journal of Cardiology, 1977
This discussion of the sinus node begins with a description of its normal anatomy, particularly in the human heart, and then proceeds to a review of the several pathologic changes known to affect the sinus node. The latter include diseases of the sinus node artery, changes in the normal collagen framework of the node, pericarditis and certain ...
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This discussion of the sinus node begins with a description of its normal anatomy, particularly in the human heart, and then proceeds to a review of the several pathologic changes known to affect the sinus node. The latter include diseases of the sinus node artery, changes in the normal collagen framework of the node, pericarditis and certain ...
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genesis, 2001
With the 125th anniversary of the original description of Hensen's node in the rabbit coming up and with current research focused on the function of this pivotal embryonic structure, this article proposes a simplified use of terms for the gastrulation organizer in amniote embryos and reemphasizes the achievements of Victor Hensen (1835-1924) in ...
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With the 125th anniversary of the original description of Hensen's node in the rabbit coming up and with current research focused on the function of this pivotal embryonic structure, this article proposes a simplified use of terms for the gastrulation organizer in amniote embryos and reemphasizes the achievements of Victor Hensen (1835-1924) in ...
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Electrical activity in sinus node and atrioventricular node
American Heart Journal, 1956Summary Complicated multiphasic differential complexes of a low voltage are demonstrated locally in the anatomic sinus nodal region. This local sinus activity is, in differential leads, most characteristic in that part of the sinus node, where, in simultaneous unipolar leads, the initial negativity is found. Pure initial negativity is seen only in a
M W, VAN DER KOOI +3 more
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Edge connectivity between nodes and node-subsets
Networks, 1998Summary: Let \(G=(V, E\)) be a graph where \(V\) and \(E\) are a set of nodes and a set of edges, respectively. Let \(X=\{V_1, V_2,\dots , V_p\}, V_i\subseteq V\) be a family of node-subsets. Each node-subset \(V_i\) is called an area, and a pair of \(G\) and \(X\) is called an area graph. A node \(v\in V\) and an area \(V_i\in X\) are called \(k\)-NA (
Hiro Ito, Mitsuo Yokoyama
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A Scalable Algorithm for Adjusting Node-Node Overlaps
International Conference on Computer Graphics, Imaging and Visualisation (CGIV'06), 2006The node-node overlaps, which occur in drawing of labeled graphs, and more importantly, in the dynamic drawing, have been a problem in graph visualization. Several approaches have recently been proposed to solve such a problem. These approaches, however, lack the scalabilities of dealing with large number of overlapping nodes.
Xiaodi Huang 0001 +2 more
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Journal of Parallel and Distributed Computing, 2006
Abstract This paper abstracts the problem of network nodes discovering one another in a network of unknown size using all-to-all gossip. The problem is studied in terms of evolving directed graphs where each vertex represents a participating node and each edge represents one node’s knowledge about another. Ideally, such a graph has diameter one, i.e.,
Kishori M. Konwar +2 more
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Abstract This paper abstracts the problem of network nodes discovering one another in a network of unknown size using all-to-all gossip. The problem is studied in terms of evolving directed graphs where each vertex represents a participating node and each edge represents one node’s knowledge about another. Ideally, such a graph has diameter one, i.e.,
Kishori M. Konwar +2 more
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Node-to-node pinning control of complex networks
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2009In this paper, we study pinning controllability of oscillator networks. We present necessary conditions for network pinning controllability based on the spectral properties of the oscillator network and the individual oscillator dynamics. We define a performance metric for pinning-control systems based on the location of pinned sites, the pinning ...
Porfiri, Maurizio, Fiorilli, Francesca
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Dynamically Exchanging Nodes of the Critical Node Problem
2018 5th IEEE International Conference on Cloud Computing and Intelligence Systems (CCIS), 2018The Critical Node Problem (CNP) aims to identify k nodes from an undirected graph G=(V,E), in order to minimize the number of pairwise connected nodes in the residual graph after deleting these k nodes. This problem has a wide range of applications in the fields of cyber security, disease control, biological analysis, social network, etc.
Xiangrong Zeng +4 more
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Nodes or no nodes: CT of adenopathy.
Critical reviews in diagnostic imaging, 1986Computed tomography (CT) is the diagnostic modality of choice in the staging of abdominal malignancies. Metastatic disease in the lymph nodes is defined on CT as nodal enlargement. The presence of enlarged nodes does not preclude inflammatory involvement.
H T, Morehouse, B A, Thornhill
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Critical Nodes Detection: Node Merging Approach
Companion Proceedings of the ACM Web Conference 2024Various cohesive models are widely employed for the analysis of social networks to identify critical users or key relationships, with the k-core being a particularly popular approach. Existing works, such as the anchor k-core problem, aim to maximize k-core by anchoring nodes (the degree of anchor nodes are set as infinity).
Hongbo Qiu +4 more
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