The Limits Of DIS: Final Report

Two reports on the computational capabilities of formal DIS networks in simulating real physical events and the demands placed on DIS in the future as projected by the DIS user community.; Contents: 50514 01 Purpose -- Background -- Phase 1 -- Phase 2 --Appendices -- A On the limitation of DIS by Thomas L. Clarke -- Appendix B Useful communications in distributed interactive simulation by Scott H. Smith --Appendix C Useful communications in distributed interactive simulation (viewgraphs) by Scott H. Smith

The Safe Zone

Two letters to the editor of the Maine Campus expressing opinions about proposes Safe Zone, on-campus housing for LGBTQ students

EEG–fMRI mapping of asymmetrical delta activity in a patient with refractory epilepsy is concordant with the epileptogenic region determined by intracranial EEG

We studied a patient with refractory focal epilepsy using continuous EEG-correlated fMRI. Seizures were characterized by head turning to the left and clonic jerking of the left arm, suggesting a right frontal epileptogenic region. Interictal EEG showed occasional runs of independent nonlateralized slow activity in the delta band with right frontocentral dominance and had no lateralizing value. Ictal scalp EEG had no lateralizing value. Ictal scalp EEG suggested right-sided central slow activity preceding some seizures. Structural 3-T MRI showed no abnormality. There was no clear epileptiform abnormality during simultaneous EEG–fMRI. We therefore modeled asymmetrical EEG delta activity at 1–3 Hz near frontocentral electrode positions. Significant blood oxygen level-dependent (BOLD) signal changes in the right superior frontal gyrus correlated with right frontal oscillations at 1–3 Hz but not at 4–7 Hz and with neither of the two frequency bands when derived from contralateral or posterior electrode positions, which served as controls. Motor fMRI activations with a finger-tapping paradigm were asymmetrical: they were more anterior for the left hand compared with the right and were near the aforementioned EEG-correlated signal changes. A right frontocentral perirolandic seizure onset was identified with a subdural grid recording, and electric stimulation of the adjacent contact produced motor responses in the left arm and after discharges. The fMRI localization of the left hand motor and the detected BOLD activation associated with modeled slow activity suggest a role for localization of the epileptogenic region with EEG–fMRI even in the absence of clear interictal discharges

Strategies for reducing nonresponse in a longitudinal panel survey

This article provides an evaluation of some of the fieldwork procedures and survey systems used on the British Household Panel Study (BHPS). The BHPS procedures for dealing with nonresponse through panel maintenance systems, tracking procedures, and refusal conversion during fieldwork are described. The analysis uses data from the first four waves of BHPS from 1991 to 1994, to examine longitudinal patterns of response and reasons for refusal. The reasons for refusal or for becoming a non-contact over the life of the panel are discussed. The process of refusal conversion is described together with conversion outcomes. Finally the effect of interviewer continuity on maintaining the co-operation of sample members is examined. The article argues that in the context of a longitudinal panel survey, having a relatively complex set of procedures in place is critically important to minimise nonresponse and maintain high response rates over time

An Unsupervised Fluoroscopic Analysis of Knee Joint Kinematics

Knowledge of the three dimensional positions of bones at a joint as a function of time is required to accurately model joint kinematics. 3-D bone geometry data from a static computer tomography (CT) images can be combined with time sequence information from 2-D video fluoroscopy images to produce 3-D position data over time. The process involves creating virtual X-rays from the CT image through digitally reconstructed radiograph (DRR) projections. Historically, the process of matching the 3-D and 2-D data has required human interaction. We have eliminated the need for manual initialization using a Monte Carlo technique with a variable search range. The search range decreases as the matching improves, avoiding the inherent problems of local minima in the optimization search. Experiments demonstrate that image positions can be matched to within 1 degree rotation, azimuth and elevation without human intervention

IST\u27s DIS Pdu Flooder: Final Report

Report on distributed interactive simulation application which is able to place large numbers of syntactically and semantically correct distributed interactive simulation protocol data units on a network to simulate the traffic that would be generated by multiple distributed interactive simulation applications

The Prediction of Sediment and Nutrient Transport in the Buffalo River Watershed Using A Geographic Information System

The Buffalo River was established by Congress in 1972 as the first National River in the United States. It is one of the few remaining free-flowing streams in northern Arkansas. The river originates in the higher elevations of the Boston Mountains in Newton County, and generally flows northeastward, intersecting the Springfield and Salem Plateaus as it drops from approximately 2000 feet in the headwaters to around 500 feet at the confluence with the White River in Marion County. It is considered by many to be one of Arkansas\u27 greatest natural treasures, and therefore , there is strong interest in protecting it from undue influences of man. One of the best general descriptions of the area within the Buffalo River watershed was given by Smith (1967)

Provide Support And Assistance Task 3.1.2.1.: Year 1 Report

Report describes the efforts undertaken by the Institute for Simulation and Training\u27s distributed interactive simulation (DIS) testbed team to assist organizations in the implementation of DIS