A Study on the Effects of C060 Gamma-radiation on Steam-grown Sio2 MOS Structures

Cobalt 60 gamma radiation effects on Metal Oxide Semiconductors /MOS/ with p-type and n-type silicon substrate

Theoretical and experimental studies of radiation induced damage to semiconductor surfaces and the effects of this damage on semiconductor device performance Final report, 1 Mar. 1964 - 31 Aug. 1968

Radiation damage on semiconductor surfaces and effects on performanc

Geometric and projection effects in Kramers-Moyal analysis

Kramers-Moyal coefficients provide a simple and easily visualized method with which to analyze stochastic time series, particularly nonlinear ones. One mechanism that can affect the estimation of the coefficients is geometric projection effects. For some biologically-inspired examples, these effects are predicted and explored with a non-stochastic projection operator method, and compared with direct numerical simulation of the systems' Langevin equations. General features and characteristics are identified, and the utility of the Kramers-Moyal method discussed. Projections of a system are in general non-Markovian, but here the Kramers-Moyal method remains useful, and in any case the primary examples considered are found to be close to Markovian.Comment: Submitted to Phys. Rev.

Tables of f/us, ub/ and g/us, ub/ functions for semiconductor surface calculations

Derivation of mathematical functions for calculating changes in semiconductor surfaces due to applied surface charg

Merging LANDSAT Derived Land Covers into Quad-referenced Geographic Information Systems

An approach for merging multiscene LANDSAT data bases into existing geographic information systems having 5-second or smaller cells is described. The approach uses the output from the State of Maryland's UNIVAC 1180-based LANDSAT classification program ASTEP (Algorithm Simulation Test and Evaluation) developed by NASA. The structure of the technique was designed to address the problems that emerged as part of the LANDSAT classification of the 64,000 square mile Chesapeake water shed involving twelve scenes. The removal of overlap among adjacent scenes, the crossreferencing of ground control points, and the isolation of the appropriate pixels from the LANDSAT data base for subsequent positioning into a file containing ancillary data referenced to a specific USGS 7 1/2 minute quadrangle sheet are described. Examples illustrate the clustering of classified LANDSAT pixels to define the dominant land use for each of 8,100 cells within a series of quadrangle sheets distributed over the State of Maryland. The approach uses a hard copy terminal tied to an ASTEP algorithm through telephone lines. A coordinate digitizing board for inputing the position of ground control points is also valuable, although manual measurements are possible. The approach is quite efficient and should be especially attractive for use on regional scale studies

Three themes for designing games that aim to promote a positive body perception in hospitalized children

Hospitalized children often experience physical changes that negatively affect their bodily perceptions, thereby adding to the stress of being sick. Existing approaches to supporting hospitalized children such as those promoted by the Clown Doctors use play to distract the child from negative bodily perceptions. In contrast, we propose reframing the bodily perception of these children through bodily virtual play facilitated by their imagination. We explore this design space through an analysis of the literature combined with design explorations around play and bodily imagination. This research results in a set of themes for games that aim to reframe bodily perception to a more positive self-image full of creative potential. We envisage that our work could help designers who aim to create digital play for sick children

Multi-level policies and adaptive social networks. A conceptual modeling study for maintaining a polycentric governance system

International audienceInformation and collaboration patterns embedded in social networks play key roles in multilevel and polycentric modes of governance. However, modeling the dynamics of such social networks in multilevel settings has been seldom addressed in the literature. Here we use an adaptive social network model to elaborate the interplay between a central and a local government in order to maintain a polycentric governance. More specifically, our analysis explores in what ways specific policy choices made by a central agent affect the features of an emerging social network composed of local organizations and local users. Using two types of stylized policies, adaptive co-management and adaptive one-level management, we focus on the benefits of multi-level adaptive cooperation for network management. Our analysis uses viability theory to explore and to quantify the ability of these policies to achieve specific network properties. Viability theory gives the family of policies that enables maintaining the polycentric governance unlike optimal control that gives a unique blueprint. We found that the viability of the policies can change dramatically depending on the goals and features of the social network. For some social networks, we also found a very large difference between the viability of the adaptive one-level management and adaptive co-management policies. However, results also show that adaptive co-management doesn't always provide benefits. Hence, we argue that applying viability theory to governance networks can help policy design by analyzing the trade-off between the costs of adaptive co-management and the benefits associated with its ability to maintain desirable social network properties in a polycentric governance framework

Different Techniques to Detect Botnet

Botnets are now considered as one of the most serious security threats. In contrast to previous malware, botnets have the characteristics of command and control (C&C) channel. Botnets usually use existing common protocols, eg IRC, HTTP and in protocol conforming manners, this makes the detection of botnet C&C a difficult problem. In this paper we tend to proposed 3 techniques specifically signature based detection, firewall IP blocking and anomaly based detection so as to detect bot and provide secure network services to the users