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Search Results: 1 - 10 of 2326 matches for " Groups. "
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Wireless Sensor Network Routing Based on Sensors Grouping  [PDF]
Ammar Hawbani, Xingfu Wang, Yan Xiong, Saleem Karmoshi
Wireless Sensor Network (WSN) , 2014, DOI: 10.4236/wsn.2014.61002
Abstract:

Due to the limited communication range of WSN, the sensor is unable to establish direct connection to the data collection station, therefore the collaborative work of nodes is highly necessary. The data routing is one of the most fundamental processes exploring how to transmit data from the sensing field to the data collection station via the least possible number of intermediate nodes. This paper addresses the problem of data routing based on the sensors grouping; it provides a deep insight on how to divide the sensors of a network into separate independent groups, and how to organize these independent groups in order to make them work collaboratively and accomplish the process of data routing within the network.

Black Community College Students and Opinions and Beliefs on Weight in the Community: A Focus Group Study  [PDF]
Janna Stephens, Antoinette Perkins
Health (Health) , 2019, DOI: 10.4236/health.2019.111007
Abstract: Objective: The purpose of this study was to better understand black community college students’ beliefs on obesity in their community. Methods: Participants were 18 - 21 years old and African American/Hispanic Black. Focus group sessions were conducted with a discussion guide. Thematic analysis was used to analyze results. Results: Five focus groups were conducted. Four major themes emerged: My Culture Matters, The Effects of Slavery are Still Present, Meet Me Where I Want to Be, Not Where Society Wants Me, and If They Have Been Fat, They Get Me. It is clear that weight programs need to be sensitive to cultural preferences. Conclusion: Our results present unique factors related to overweight/obesity in the Black community.
A Field Experiment on the Recurrence of Large Waves in Wind Seas  [PDF]
Paolo Boccotti
Open Journal of Marine Science (OJMS) , 2011, DOI: 10.4236/ojms.2011.13007
Abstract: Wind generated sea waves are generally regarded as an example of pure randomness in nature. Here we give a proof that the matter is not exactly so: some identical sequences of relatively large waves were found many hours apart from one another. This finding supports the theory of quasi determinism of sea waves.
Impact of Age on CD4 Response to Combination Antiretroviral Therapy: A Study in Tehran, Iran  [PDF]
Mehrdad Hasibi, Mahboubeh Hajiabdolbaghi, Shahin Hamzelou, Sara Sardashti, Maryam Foroughi, Zahra Bayat Jozani, SeyedAhmad SeyedAlinaghi
World Journal of AIDS (WJA) , 2014, DOI: 10.4236/wja.2014.42020
Abstract:


Background: This study was undertaken to address the controversy regarding immunologic response to combination antiretroviral therapy (cART) among older patients. Methods: In a cross-sectional study all patients attending the HIV Clinic at Imam Khomeini Hospital (Tehran) from 2010 to 2011 were evaluated. Immunologic response was investigated using consecutive CD4+ T-cell counts in a one-year interval and outcomes were analyzed for older (>=50 yrs) and younger (<50 yrs) patients using SPSS version 16.0. Results: A total of 714 patients were actively enrolled in the clinic while 24 were 50 years or older, and had initiated ART; a similar random group of younger patients was selected as the control. Hepatitis C was the most prevalent co-infection in both groups. Patients with no serologic evidence of hepatitis B and C had significantly higher CD4+ T-cell counts than HIV/HBV co-infected patients after 12 months (p = 0.04). The average increased CD4+ T-cell counts in 6, 9, and 12 months of cART initiation were lower among older patients but the difference was not significant (50.75 vs. 123.08; p = 0.37, 132.87 vs. 710.58; p = 0.25, 271.27 vs. 500; p = 0.65). Conclusion: About 11% of the registered HIV-positive patients at our clinic were 50 years or older while their immunologic response to cART showed to be different. Specific needs of older HIV infected patients are highly recommended to be addressed in future treatment and care programs.

Amenability and the Extension Property  [PDF]
Antoine Derighetti
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.519279
Abstract: Let G be a locally compact group, H a closed amenable subgroup and u an element of the Herz Figà-Talamanca algebra of H with compact support, we prove the existence of an extension of u to G, with a good control of the norm and of the support of the extension.
The Influence of Team Demographic Composition on Individual Helping Behavior  [PDF]
Igor Kotlyar, Leonard Karakowsky
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.312152
Abstract: The aim of our laboratory study was to examine how the demographic composition (in terms of gender and culture) of work teams can influence levels of helping behavior demonstrated among group members. Participants included 216 university students from undergraduate business programs in two large North American universities (108 men, 108 women) who were randomly assigned to small groups for the purpose of engaging in business case discussions. Discussions were videotaped in order to observe helping behavior among individuals. Our findings indicated that the numerical minority member (measured in terms of gender or ethnicity) was less likely to engage in the helping activity. These findings suggest that the effects of numerical minority status are not confined to task-performance related behaviors like participation and emergent leadership, but also influence behaviors that involve how members relate to one and other, and whether they engage in helping behavior.
Opening of a Gap in Graphene Due to Supercell Potential: Group Theory Point of View  [PDF]
E. Kogan, M. Kaveh
Graphene (Graphene) , 2014, DOI: 10.4236/graphene.2014.32004
Abstract:

We analyze in the framework of the space group theory the change of the dispersion law in grapenein and the vicinity of the (former) Dirac points due to application of supercell potential with the \"\" space priodicity and the same point symmetry as graphene.

Problems with Double Blind in Medicine  [PDF]
Yngvar Reichelt, Karl L. Reichelt
Open Journal of Psychiatry (OJPsych) , 2015, DOI: 10.4236/ojpsych.2015.52024
Abstract: Double blind tests of drugs and procedures depend on obtaining two equal and randomly assigned groups to be compared. With a diagnosis based only on symptoms, but with different etiologies, this is not very likely. We here show the probability of obtaining two equal groups with one diagnosis but three etiologies. The mathematical name for such a problem is multivariate hypergeometric distribution. We find that increasing the group size decreases the probability.
A remark on operating groups
Yanming Wang
International Journal of Mathematics and Mathematical Sciences , 1997, DOI: 10.1155/s0161171297000501
Abstract: Let G be a finite group and H be an operator group of G. In this short note, we show a relationship between subnormal subgroup chains and H-invariant subgroup chains. We remark that the structure of H is quite restricted when G has a special H-invariant subgroup chain.
AGING COEFFICIENT IN DIFFERENT RELIGIOUS GROUPS IN IRAN
D.D. Farhud,H. Sadighi,H. Pour-Jafari,A.M. Sheibni
Iranian Journal of Public Health , 1998,
Abstract: Aging Coefficient (AC), or aged–child ratio, is the number of individuals aged 65 years and over, divided by the number of individuals aged 0-14, multiplied by 100. In this point–descriptive study, the aging coefficient has been calculated for the followers of four different religions, for the past four respective decades, according to sex and locality. Overall age composition in different religious groups, in a decreasing order is: Christians, Jews, and Zoroastrians showed a slight decrease in the 80’s and a higher increase afterward. Moslems show a more consistent mode, but with a slight increase in the last decade; but in all cases AC has been lower than 15, presenting a higher proportion of a young population or lower aged group. The increase of AC in each group can be caused by the old age survival, i.e. increasing life expectancy, or decreasing birth rate
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