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A study of Call admission Control to Optimize the performance for wireless Cellular Communication Networks

Vivek Misra

Department of Computer Science, Lord Krishna collage of Eng. Ghaziabad

professoriit@yahoo.in

Abstract: We study to call admission control system through wireless cellular communication networks. A Call admission control is a key element in the provision of guaranteed quality of service in wireless networks. Call admission control is a technique to provide the quality of service in a communication network by restricting the access to other network resources. Simply we stated that an admission control system to accept a new call request provided there are adequate free resources to meet the quality of services requirement of the new call request without violating the committed quality of service of already accepted calls. The design of all admission control algorithms for mobile cellular networks is especially challenging given the limited and highly variable resources and the mobility of users encountered in such networks. This paper provides a study of admission control mechanism for cellular networks and also describes comparisons between call admission control mechanisms.

[Vivek Mishra. A study of call admission control to optimize the performance for wireless cellular communication Networks. Stem Cell. 2011;2(4):1-2] (ISSN 1545-4570). http://www.sciencepub.net. 1

doi:10.7537/marsscj020411.01

Keywords: Call admission control system, Quality of service, Wireless cellular communication network.

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Studies on the prevalence of tapeworm infection in Yobe State indigenes, Nigeria

¹Biu , A. A., ²Rabo, J.S., ³ Dawurung J.S and ⁴Kolo, M. A.

^1&4Department of Veterinary Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Maiduguri, Nigeria

²Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, University of Agriculture, Makurdi, Nigeria

³ WHO National Polio Laboratory, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria

biuvet@yahoo.com

Abstract:A survey using sedimentation technique and gross examination of stool samples for tapeworm ova and segments respectively in human patients in Potiskum, Nigeria was conducted between November, 2003 and April, 2004. Of the 210 patients examined, 9(4.3%) were infected with tapeworms, with more males 6(6.6%) compared with females (2.5%) (p>0.05). The tapeworms recorded were Hymenolepis nana 8(88.9%) and Taenia saginata 1(1.1%) (p<0.05); with age groups between 17 and 22 years having the highest prevalence of 4 (1.9%).

[Biu , A. A., Rabo, J.S., Dawurung J.S and Kolo, M. A. Studies on the prevalence of tapeworm infection in Yobe State indigenes, Nigeria. Stem Cell. 2011;2(4):3-4] (ISSN 1545-4570). http://www.sciencepub.net. 2

doi:10.7537/marsscj020411.02

Keywords: Human, Tapeworm, Potiskum, Nigeria.

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A Potential Proposal for Renal Stem Cell Studies

Jenny Young *, Ma Hongbao *, Sun Yiwu *, Zhu Huaijie **, Zhu Yucui **

* Brookdale University Hospital and Medical Center, Brooklyn, New York 11212, USA

** Columbia University, Manhattan, NY 10027, USA

ma8080@gmail.com

Abstract: Currently, stem cell medicine has become a practical method on many seriously diseases. The general techniques on stem cell application are to define, isolate and expand stem cells from target tissues so that they can be used to either repair or regenerate damaged organs. Normally, the research practical program on stem cell could be divided into 3 sections: (1) Isolation of stem cells from embryo and/or other resources (such as adipose and somatic tissue). (2) Embryonic stem (ES) cells differentiate into somatic stem cells and/or progenitor cells. (3) Somatic stem and/or progenitor cells differentiated from ES cells are used for body repair and/or regeneration.

[Young J, Ma H, Sun Y, Zhu H, Zhu Y. A Potential Proposal for Renal Stem Cell Studies. Stem Cell. 2011;2(4):5-30] (ISSN 1545-4570). http://www.sciencepub.net/stem. 3

doi:10.7537/marsscj020411.03

Keywords: stem cell; medicine; disease; regeneration; embryonic; somatic; differentiation

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The Discovery History of Stem Cell

Ma Hongbao, Ph.D.

Brookdale University Hospital and Medical Center, Brooklyn, New York 11212, USA, ma8080@gmail.com

Abstract: The definition of stem cell is “an unspecialized cell that gives rise to a specific specialized cell, such as a blood cell”. Embryonic stem cells are derived from the inner cell mass of blastocyst stage embryos. Somatic stem cells differentiate into only the cells the specific tissue wherein they reside. Stem Cell is the original of life. All cells come from stem cells. This article describes a brief history of the discovery of stem cells.

[Ma H. The Discovery of Stem Cell. Stem Cell 2011;2(1):31-33] (ISSN 1545-4570). http://www.sciencepub.net/stem. 4

doi:10.7537/marsscj020411.04

Key words: DNA; eternal; life; stem cell; discovery

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Literatures Introducing of Lipopolysaccharide, Toll-like Receptor 4 and Stem Cells

Hongbao Ma, Yan Yang

Brookdale University Hospital and Medical Center, Brooklyn, NY 11212, USA, ma8080@gmail.com

Abstract: This offers some literatures we got form the public resources as the readers’ references.

[Ma H, Yang Y. Literatures Introducing of Lipopolysaccharide, Toll-like Receptor 4 and Stem Cells. Stem Cell 2011;2(4):34-55] (ISSN 1545-4570). http://www.sciencepub.net. 5

doi:10.7537/marsscj020411.05

Keywords: lipopolysaccharide (LPS); toll-like receptor (TLR); stem cell

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Stem Cell and Transdifferentiation Literatures

Mark H Smith

Queens, New York 11418, USA

mark20082009@gmail.com

Abstract: The definition of stem cell is “an unspecialized cell that gives rise to a specific specialized cell, such as a blood cell”. Stem Cell is the original of life. All cells come from stem cells. Serving as a repair system for the living body, the stem cells can divide without limit to replenish other cells as long as the living body is still alive. When a stem cell divides, each new cell has the potential to either remain a stem cell situuition or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, a bone cell, a nerve cell, or a brain cell. Stem cell research is a tipical and important topic of life science. This material collects some literatures on stem cell and transdifferentiation.

[Smith MH. Stem Cell and Transdifferentiation Literatures. Stem Cell 2011;2(4):56-81] (ISSN 1545-4570). http://www.sciencepub.net/stem. 6

doi:10.7537/marsscj020411.06

Key words: stem cell; life; gene; DNA; protein; transdifferentiation

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Induced Pluripotent Stem Cell (ips) Literatures

Mark H Smith

Queens, New York 11418, USA

mark20082009@gmail.com

Abstract: The definition of stem cell is “an unspecialized cell that gives rise to a specific specialized cell, such as a blood cell”. Stem Cell is the original of life. All cells come from stem cells. Serving as a repair system for the living body, the stem cells can divide without limit to replenish other cells as long as the living body is still alive. When a stem cell divides, each new cell has the potential to either remain a stem cell situation or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, a bone cell, a nerve cell, or a brain cell. Stem cell research is a typical and important topic of life science. This material collects some literatures on induced pluripotent stem cell (ips).

[Smith MH. Induced Pluripotent Stem Cell (ips) Literatures. Stem Cell 2011;2(4):82-90] (ISSN 1545-4570). http://www.sciencepub.net/stem. 7

doi:10.7537/marsscj020411.07

Key words: stem cell; life; gene; DNA; protein; induced pluripotent stem cell (ips)

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Stem Cell Definition, Classification and Research History

Mark H Smith

Queens, New York 11418, USA

mark20082009@gmail.com

Abstract: The definition of stem cell is “an unspecialized cell that gives rise to a specific specialized cell, such as a blood cell”. Stem Cell is the original of life. All cells come from stem cells. Serving as a repair system for the living body, the stem cells can divide without limit to replenish other cells as long as the living body is still alive. When a stem cell divides, each new cell has the potential to either remain a stem cell situation or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, a bone cell, a nerve cell, or a brain cell. Stem cell research is a typical and important topic of life science. This material collects some literatures on stem cell Definition, classification and research history.

[Smith MH. Stem Cell Definition, Classification and Research History. Stem Cell 2011;2(4):91-128] (ISSN 1545-4570). http://www.sciencepub.net/stem. 8

doi:10.7537/marsscj020411.08

Key words: stem cell; life; gene; DNA; protein; definition; classification; history

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