Prototype remote vehicle diagnostics for police cruisers

The goal of this thesis was to suggest ways of evaluating the health of police cruisers without bringing these cruisers into a repair facility. The prototype in-car application was developed. The hardware connection was made between the in-car network and the Project54 network. The software was built to collect, process, and send the vehicle information to the server via a telecommunication tool. The prototype in-car application was tested in simulation and on the road. After the development of the prototype in-car application, the radio traffic research gives a few recommended methods for sending the car health information in the New Hampshire Department of Safety radio. The police radio was monitored and interpreted. The gathered radio traffic data was modeled in different perspectives. The recommendations were made based on simulation

The Bishop–Phelps–Bollobás property and lush spaces

AbstractWe prove that for every lush space X, the couple (ℓ1,X) has the Bishop–Phelps–Bollobás property for operators, that is, every lush space has the AHSP (standing for the approximate hyperplane series property). While every lush space has the alternative Daugavet property, there exists a space with the alternative Daugavet property that does not have the AHSP. We also show that there is a Banach space with both the AHSP and the alternative Daugavet property which is not lush

Rac GTPases in Human Diseases

Rho GTPases are members of the Ras superfamily of GTPases that regulate a wide variety of cellular functions. While Rho GTPase pathways have been implicated in various pathological conditions in humans, to date coding mutations in only the hematopoietic specific GTPase, RAC2, have been found to cause a human disease, a severe phagocytic immunodeficiency characterized by life-threatening infections in infancy. Interestingly, the phenotype was predicted by a mouse knock-out of RAC2 and resembles leukocyte adhesion deficiency (LAD). Here we review Rho GTPases with a specific focus on Rac GTPases. In particular, we discuss a new understanding of the unique and overlapping roles of Rac2 in blood cells that has developed since the generation of mice deficient in Rac1, Rac2 and Rac3 proteins. We propose that Rac2 mutations leading to disease be termed LAD type IV

Simulation of filtration for suspension transport in porous media

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.Page 308 blank.Includes bibliographical references (p. 295-307).This thesis describes the development and application of a novel method for analyzing the filtration of particles transported through a granular porous medium. The proposed analysis considers the deposition of particles through discrete simulations of particle-laden flow in a cylindrical model pore. The pore model assumes that particles collect, mound up and ultimately clog the pore under the action of hydrodynamic and gravitational forces. By simulating particle deposition processes at the pore scale, the current analyses provide a more realistic physical framework for interpreting filtration experiments than conventional continuum models that implicitly assume length scales much larger than the pores. A detailed parametric study has established relationships between the collection efficiency, mound height and deposit depth as functions of the model pore dimensions, orientation (relative to the gravitational field) and particle settling velocity for injection at constant flow rate. The results showed that the maximum mound height and deposit depth can be correlated with the pressure difference necessary to maintain flow through the model pore. A quasi one-dimensional network 'bubble' model (Datta and Redner, 1998) was developed to simulate 1-D suspension transport problems. The bubble model comprises a serial linkage of bundles of cylindrical bonds with shared nodes at each end. Bubble model simulations include distribution functions for the pore dimensions. Filtration in an individual bond is characterized by correlations from the model pore simulations.The bubble model has been applied to interpret filtration data from two sets of column experiments: acrylic particle transport through glass beads by Yoon et al. (2004), and microfine cement suspension through a sand bed by Bouchelaghem and Vulliet (2001). It was found that the collection efficiency obtained from model pore simulations overestimates the measured filtration rates due to detachment process that are not considered in the parametric study. Two empirical parameters, attachment probability and detachment rate were employed to partition the deposited particles between those firmly attached and those detachable, and its rate of re-entrainment. With these parameters, the bubble model produced successful predictions of measured temporal and spatial filtration extent in column tests that have proved difficult to simulate with continuum models.by Yun Sung Kim.Ph.D