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- Title
- Joint TCP congestion control and wireless-link scheduling for mobile Internet applications.
- Creator
- Li, Zhaoquan., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite, which is used by major Internet applications such as World Wide Web, email, remote administration and file transfer. TCP implements scalable and distributed end-to-end congestion control algorithms to share network resources among competing users. TCP was originally designed primarily for wired networks, and it has performed remarkably well as the Internet scaled up by six orders of magnitude...
Show moreThe Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite, which is used by major Internet applications such as World Wide Web, email, remote administration and file transfer. TCP implements scalable and distributed end-to-end congestion control algorithms to share network resources among competing users. TCP was originally designed primarily for wired networks, and it has performed remarkably well as the Internet scaled up by six orders of magnitude in the past decade. However, many studies have shown that the unmodified standard TCP performs poorly in networks with large bandwidth-delay products and/or lossy wireless links. In this thesis, we analyze the problems TCP exhibits in the wireless communication environment, and develop joint TCP congestion control and wireless-link scheduling schemes for mobile applications. ... Different from the existing solutions, the proposed schemes can be asynchronously implemented without message passing among network nodes; thus they are readily deployable with current infrastructure. Moreover, global convergence/stability of the proposed schemes to optimal equilibrium is established using the Lyapunov method in the network fluid model. Simulation results are provided to evaluate the proposed schemes in practical networks.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3362481
- Subject Headings
- Wireless communication systems, Quality control, Mobile communication systems, Technological innovations, TCP/IP (Computer network protocol), Ad hoc networks (Computer networks), Computer network protocols, Wireless Internet
- Format
- Document (PDF)
- Title
- How do home and community based services change long-term care?.
- Creator
- Perez, Enrique M., College for Design and Social Inquiry, School of Public Administration
- Abstract/Description
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The relationship between Public Administration and the people is one that requires legitimacy and compromise in order to solve complex problems. Individuals with intellectual and developmental disabilities (IDD) and their families during the last fifty years have put forth an agenda that calls for the advancement of rights for the disabled and more integration into the larger society. In this arena, government, with post civil rights legislation like the 1990 Americans with Disabilities Act ...
Show moreThe relationship between Public Administration and the people is one that requires legitimacy and compromise in order to solve complex problems. Individuals with intellectual and developmental disabilities (IDD) and their families during the last fifty years have put forth an agenda that calls for the advancement of rights for the disabled and more integration into the larger society. In this arena, government, with post civil rights legislation like the 1990 Americans with Disabilities Act (ADA), plays a huge role in promoting social awareness and bringing down barriers of stigmatization, understanding, and access. This struggle is fought on many fronts. A significant part of the effort focuses on moving the locus of long-term care of the disabled, including the IDD population, from an institutional setting to the least restrictive setting that will foster social ties and integration. Since the early 1980s as part of this effort to deinstitutionalize the disabled, legislation at both the federal and state level has supported and incentivized the creation of Home and Community Based Service (HCBS) programs. HCBS waivers, as they are typically called, are also promoted as a means of containing government expenditures for long-term care. However, the effectiveness of these waivers is poorly understood. The critical questions being - Do HCBS waivers promote and create an environment that increases awareness of the needs of IDD individuals? Do the programs help reduce stigmatization, promote understanding, and increase access to services and activities that foster social interaction? Or, do HCBS waivers create a new "iron cage" where the intellectually or developmentally disabled are once again relegated to existing as second class citizens? In this research, programs are mapped and then evaluated to paint a better picture of how HCBS waivers change long-term care., This research combines qualitative and quantitative approaches to triangulate on these phenoamea as a means to investigate when and how HCBS waiver programs facilitate, promote, or stifle the social integration of those with IDD. How does social integration manifest itself in the quality long-term care of those who often cannot take care of themselves?
Show less - Date Issued
- 2011
- PURL
- http://purl.flvc.org/FAU/3318667
- Subject Headings
- Long-term care of the sick, Medical care, Quality control, Sociology of disabiltiy, Heath care rationing, Outcome assessment (Medical care), Community health services
- Format
- Document (PDF)
- Title
- Mechanisms of protection against ischemic damage in the heart.
- Creator
- Moench, Ian, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Heart disease including ischemic heart disease is the highest contributor to death and morbidity in the western world. The studies presented were conducted to determine possible pathways of protection of the heart against ischemia/reperfusion. We employed adenovirus mediated over-expression of Methionine sulfoxide reductase A (MsrA) in primary neonatal rat cardiac myocytes to determine the effect of this enzyme in protecting against hypoxia/reoxygenation. Cells transfected with MsrA encoding...
Show moreHeart disease including ischemic heart disease is the highest contributor to death and morbidity in the western world. The studies presented were conducted to determine possible pathways of protection of the heart against ischemia/reperfusion. We employed adenovirus mediated over-expression of Methionine sulfoxide reductase A (MsrA) in primary neonatal rat cardiac myocytes to determine the effect of this enzyme in protecting against hypoxia/reoxygenation. Cells transfected with MsrA encoding adenovirus and subjected to hypoxia/reoxygenation exhibited a 45% decrease in apoptosis as compared to controls. Likewise total cell death as determined by levels of Lactate Dehydrogenase (LDH) release was dramatically decreased by MsrA overexpression. The initial hypothesis that led to our testing sulindac was based on the fact that the S epimer of sulindac was a substrate for MsrA and that this compound might function as a catalytic anti-oxidant based on a reaction cycle that involved reductio n to sulindac sulfide followed by oxidation back to sulindac. To test this we examined the protective effect of sulindac in hypoxia re-oxygenation in both cardiac myocytes in culture and using a Langendorff model of myocardial ischemia. Using this model of myocardial ischemia we showed that pre-incubation of hearts with sulindac, or the S and R epimers of sulindac resulted in protection against cell death. We present several lines of evidence that the protective effect of sulindac is not dependent on the Msr enzyme system nor does it involve the well established role of sulindac as a Cyclooxygenase (COX) inhibitor. Numerous signaling pathways have been implicated in myocardial protective mechanisms, many of which require fluctuations in ROS levels as initiators or mediators., Sulindac shows very good potential as a preconditioning agent that could induce tissue protection against oxidative damage.Blocking of preconditioning pathways by administration of the PKC blocker chelerythine abrogated the ischemic protection afforded by sulindac. Secondly, an end-effector of preconditioning, inducible nitric oxide synthase (iNOS),was found to be induced by greater than 5 fold after 48 h prior feeding sulindac.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/186291
- Subject Headings
- Biochemical markers, Diagnostic use, Cardiovascular system, Diseases, Diagnosis, Heart, Diseases, Molecular aspects, Medical care, Quality control, Coronary heart disease, Prevention, Apoptosis, Myocardial infarction, Prevention
- Format
- Document (PDF)
