Article history: Received 8 November 2012 Accepted 7 January 2014 Available online 23 January 2014 Submitted by R. Brualdi Dedicated to the memory of Uri Rothblum MSC: 52B 52C 62H 68Q 68R 90B 90C

We study the problem of exploration by a mobile entity (agent) of a class of dynamic networks, namely constantly connected dynamic graphs. This problem has already been studied in the case where the agent knows the dynamics of the graph and the underlying graph is a ring of n vertices [5]. In this paper, we consider the same problem and we suppose that the underlying graph is a cactus graph (a ...

In this article, we find stability criteria for perturbed differential systems, in terms of two measures. Our main tool is a definition of total stability based on two classes of perturbations.

BACKGROUND Ependymoma is a glial tumor that occurs in the central nervous system. The intradural extramedullary location of this neoplasm is very rare. The authors report a case of spinal intradural extramedullary ependymoma in a male and discuss its pathogenesis as well as its clinical, radiological, and therapeutical features. CASE DESCRIPTION A 31-year-old man was admitted at the author's ...

We demonstrate the feasibility of throughput-e cient routing in a highly unreliable network. Modelling a network as a graph with vertices representing nodes and edges representing the links between them, we consider two forms of unreliability: unpredictable edge-failures, and deliberate deviation from protocol speci cations by corrupt nodes. The rst form of unpredictability represents networks ...

We demonstrate the feasibility of throughput-efficient routing in a highly unreliable network. Modeling a network as a graph with vertices representing nodes and edges representing the links between them, we consider two forms of unreliability: unpredictable edge-failures, and deliberate deviation from protocol specifications by corrupt nodes. The first form of unpredictability represents netwo...

Abstract Social change is an integral part of human social behavior and a phenomenon that continuously happening around us. We constantly challenge existing structures institutions transform them by contesting the cultural norms values upon which they are founded. While such disruption may seem at superficial level negative form disorder, in reality, it represents way societies develop evolve o...

Ensuring the right to live in a healthy environment is not solely explicit responsibility of state and public authorities. It also individual citizens who are holders this right. Raising awareness about all aspects environmental protection each just professionals institutions provide current future generations equal measure. Legislation on harmonized greatest extent with international standards...

Paget-Schrotter syndrome is a rare form of upper extremity thrombosis of which diagnosis is usually performed with duplex Doppler ultrasound study. Even if the ultrasound reveales no abnormalities, meticulous evaluation of the clinical findings may help to prompt cure, and the early thrombolytic therapy relieves symptoms. We report a 19-year-old male patient with complaints of a suddenly develo...