Existing network transport protocols such as TCP and UDP have limitations when fitting into new technologies, includes, e.g., increased heterogeneity and mobility. In order to solve this problem, our attempt is to design a selfadaptive transport protocol, which can fit into the network condition dynamically according to the parameters given by upper layer and the network layer. This paper analy...

In this paper, we study the effect of bit error rates and handoff disconnections on the performance of different TCP implementations (Tahoe, Reno, NewReno, and SACK). Test scenarios with larger link-up periods, when the mobile is connected, but higher disconnection probability yielded better performance than scenarios with smaller link-up periods and smaller disconnection probability. Our perfo...

abstract rockfill dams are a type of hydraulic control structures used to protect river bed in cases where a considerable reservoir volume is available behind these structures; it could mitigate the floods and provide a gradual depletion of incoming volume of water so that the discharge passing downstream is decreased. one of the main issues on utilizing rockfill dams is to keep its permeabilit...

pure rockfill dams have been found specific attention in watershed management and flood control, recently. in addition to hydraulic specific features, one of the important advantages of these structures is their consistency with nature and environment. normally, floods are accompanied with high sediment loads which may enter the body of dam. when flow through dam body governed by hydraulic grad...

In this paper, we study the coherent transport of single photon in a coupled resonator waveguide (CRW) where two threelevel Λ-type atomic ensembles are embedded in two separate cavities. We show that it is possible to control the photon transmission and reflection coefficients by using classical control fields. In particular, we find that the total photon transmission and reflection are achieva...

*Supported by DOE and ONR The transport and matching problem for a low energy transport system is approached from a control theoretical viewpoint. We model the beam dynamics and transport section using the KV envelope equations. To this model we apply the principles of optimal control to formulate techniques which aid in the design of the transport and matching section. The techniques are appli...

The effects of digoxin on monovalent cation active transport were determined in cardiac tissue obtained from dogs given inotropic, toxic, or lethal doses of digoxin. In hemodynamically monitored dogs, active uptake of the K+ analogue Rb+ was determined in vitro in a control myocardial biopsy, and then in serial biopsies from the same dog after the infusion of [3H]digoxin in doses sufficient to ...

Modeling security information has always been a fundamental part of every security system. A robust and flexible model is needed in order to guarantee both the easy management of security information and the efficient implementation of security mechanisms. In this paper, we present an XMLbased framework, which can be used for controlling access to computer systems. The framework is mainly targe...

Enforcing privacy on public clouds through access control mechanisms are currently based on Single Layer Encryption. Under Single Layer Encryption, data owners should upload data on the cloud after encrypting them and have to re-encrypt the data whenever access policies or user profiles are changed. This could increase the communication and computational costs at data owners. A better approach ...

The Google File System (GFS) is a highly distributed, faulttolerant file system designed for large files and high throughput batch processing. We consider the first complete security analysis of GFS systems. We formalize desirable security properties with respect to the successful enforcement of access control mechanisms and data confidentiality by considering a threat model that is much strong...