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Search Results: 1 - 10 of 449 matches for " Mahammad Yunus "
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Influence of Prenatal Arsenic Exposure and Newborn Sex on Global Methylation of Cord Blood DNA
J. Richard Pilsner, Megan N. Hall, Xinhua Liu, Vesna Ilievski, Vesna Slavkovich, Diane Levy, Pam Factor-Litvak, Mahammad Yunus, Mahfuzar Rahman, Joseph H. Graziano, Mary V. Gamble
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0037147
Abstract: Background An emerging body of evidence indicates that early-life arsenic (As) exposure may influence the trajectory of health outcomes later in life. However, the mechanisms underlying these observations are unknown. Objective The objective of this study was to investigate the influence of prenatal As exposure on global methylation of cord blood DNA in a study of mother/newborn pairs in Matlab, Bangladesh. Design Maternal and cord blood DNA were available from a convenience sample of 101 mother/newborn pairs. Measures of As exposure included maternal urinary As (uAs), maternal blood As (mbAs) and cord blood As (cbAs). Several measures of global DNA methylation were assessed, including the [3H]-methyl-incorporation assay and three Pyrosequencing assays: Alu, LINE-1 and LUMA. Results In the total sample, increasing quartiles of maternal uAs were associated with an increase in covariate-adjusted means of newborn global DNA methylation as measured by the [3H]-methyl-incorporation assay (quartile 1 (Q1) and Q2 vs. Q4; p = 0.06 and 0.04, respectively). Sex-specific linear regression analyses, while not reaching significance level of 0.05, indicated that the associations between As exposures and Alu, LINE-1 and LUMA were positive among male newborns (N = 58) but negative among female newborns (N = 43); tests for sex differences were borderline significant for the association of cbAs and mbAs with Alu (p = 0.05 and 0.09, respectively) and for the association between maternal uAs and LINE-1 (p = 0.07). Sex-specific correlations between maternal urinary creatinine and newborn methyl-incorporation, Alu and LINE-1 were also evident (p<0.05). Conclusions These results suggest that prenatal As exposure is associated with global DNA methylation in cord blood DNA, possibly in a sex-specific manner. Arsenic-induced epigenetic modifications in utero may potentially influence disease outcomes later in life. Additional studies are needed to confirm these findings and to examine the persistence of DNA methylation marks over time.
Prediction of Resilience of Adolescents Whose Parents Are Divorced  [PDF]
Yunus Altunda?, Sefa Bulut
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.510134
Abstract:

The purpose of this study is to examine the predictive effect of life satisfaction and loneliness level of adolescents with divorced parents on resilience. The study has been carried out on 144 adolescents, 75 of whom are female and 69 are male, and whose parents are officially divorced. The study group consisted of students who are attending different types of high schools in the city of Bolu central districts. Loneliness Scale, Life Satisfaction Scale and Adolescents Resilience Scales were utilized in the data collection process. Pearson Moment Correlation and Multiple Regression analyses were used in data analysis. The results revealed that, while there was a positive relationship between resilience and life satisfaction, a strong negative relationship was found between their resilience and loneliness level of the adolescents whose parents are divorced. Regression analysis revealed that, while loneliness was a significant predictor on resilience, life satisfaction was not a significant predictor of resilience. The findings of this research were discussed within the scope of the related literature.

Usage of Mobile Technologies in Social Skills Development  [PDF]
Yunus Günindi
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.516174
Abstract: In this study, it has been aimed to reveal that pre-school children’s social adaptation skills can be supported by the application of frame code. The other aim of this study is to create awareness about the possible application areas of mobile learning technologies within the frame code in pre-school education. For this purpose, the study that consists of four experimental and four control group classes coming from similar socio-economic families children in five age groups that continued in kindergarten was carried out. 162 children participated in this study including 81 applications and 81 control groups. “Social Skills Training Program” supported by Frame Code Application (consisting of 12 acquisitions and 41 indicators) was prepared and during seven weeks, it was administered under the guidance of teachers. In order to evaluate the data before and after implementation, “Social Adaptation and Skills Scale” was used. According to the results of the study, in terms of sub-factors and social adaptation of the scale of “Social Adaptation and Skills Scale”, it was found that there was a significant difference in favor of the experimental group between experimental and control groups after application; however, after the application, social inadaptability sub-factor scores of the children in the experimental group were lower than the scores of control group children.
Well-Posedness of Gaver’s Parallel System Attended by a Cold Standby Unit and a Repairman with Multiple Vacations  [PDF]
Abdukerim Haji, Bilikiz Yunus
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.37101
Abstract:

We investigate Gaver’s parallel system attended by a cold standby unit and a repairman with multiple vacations. By using C0-semigroup theory of linear operators in the functional analysis, we prove well-posedness and the existence of the unique positive dynamic solution of the system.

Factors in Failure of Achieving LBI KPI: Teachers’ Perception  [PDF]
Nithia Prathiba, Melor Md Yunus
Creative Education (CE) , 2019, DOI: 10.4236/ce.2019.103045
Abstract: The Literacy, Numeracy and screening (LINUS LBI) 2.0, an intervention program was first implemented in 2013. It aimed to enhance the rate of English literacy among lower primary ESL learners. However, the number of non-achievers increased every year.The effectiveness of this program depends largely on the teachers, as they play a significant role in implementation. To a noteworthy extent, the teachers’ perception which covers the factors leads to the failure of this program will realize the dream of Ministry of Education. Thus, this study was embarked to investigate teacher’s perceptions on failure in achieving LBI KPI in grade B national schools in Temerloh District. A mixed method study was adopted to carry out this research with 80 teachers from 36 grade B national schools in Temerloh district. The participants were questioned on unavailability of resources, lack of training and support and other contributing factors. Questionnaire and individual interview were used to gather data. The overall findings of the study were?that?unavailability of resources and facilities, lack of training and support, pupils’ attendance, cooperation of stakeholders and pedagogical knowledge played a huge role in the failure in achievement of LBI KPI. The implication of the study is that Ministry needs?to be made aware of these factors in order to reevaluate the program to be successfully implemented and to take into considerations of the factors for other programs implementation as well.
IN DEPTH ANALYSIS OF PREPROCESSING, MINUTIAE EXTRACTION AND POST PROCESSING IN FINGERPRINT SYSTEM
Ramesh Sunder Nayak,Mahammad K Bammanalli
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: Conventional algorithms for fingerprint recognition are mainly based on minutiae information. However, the small number of minutiae in partial fingerprints is still a challenge in fingerprint matching. In fingerprint recognition systems, there are frequently appeared partial fingerprints, such as incompletely touching in fingerprint scanning or latent fingerprints. In this paper, we studied the influence of the fingerprint area in partial fingerprint recognition. First, a simulation scheme was proposed to construct a serial of partial fingerprints with different area. Then, the influence of the fingerprint area in partial fingerprint recognition is studied. By comparing the performance of partial fingerprint recognition with different fingerprint area, some useful conclusions can be drawn: (1) The decrease of the fingerprint area degrades the performance of partial fingerprint recognition; (2) When the fingerprint area decreases, the genuine matching scores will decrease, whereas the im-poster matching scores will increase; (3) When the area of partial fingerprints is smaller than 20,000 pixels (about fifth of the normal full fingerprints), the performance of partial fingerprint recognition becomes very poor; (4) The threshold value of a given false accept rate increases when the area of partial fingerprints decrease a lot, but it remains almost the same if the area of partial fingerprints decrease not so much, e.g., greater than 50,000 pixels (about half of the normal full fingerprint). These observations can be helpful in improving the performance of partial fingerprint recognition in the future.
A Survey of Human Factors’ Impacts on the Effectiveness of Accounting Information Systems
Hamed Dehghanzade,Mahammad Ali Moradi,Mahvash Raghibi
International Journal of Business Administration , 2011, DOI: 10.5430/ijba.v2n4p166
Abstract: One of the significant factors of management success in achieving organization goals is effectiveness of accounting information systems, and the users of the accounting information systems have a great role in the effectiveness of the systems. The purpose of this study is to investigate the impact of human factors including individual and personal characteristics of the users of accounting information systems computer-based on effectiveness of these systems. For this purpose, a sample includes 62 offices, organizations and public sector and private companies that use accounting information system computer-based, has been randomly selected and the required data has been gathered using questionnaires. In order to discover the personal characteristics of the users, NEO questionnaires which are designed based on Five Factor Model of Personality, has been used. In order to study the relation between personality and effectiveness of the system, five hypotheses based on five main features of personality have been discussed. Moreover, in order to investigate the relationship between expertise (educational field, educational level and amount of training courses of computer skills), experience and job satisfaction of the users, and the effectiveness of the accountancy information systems computer-based, some hypotheses have also been written and studied. The information about the effectiveness of the system has been gathered by a self-made questionnaire and the accuracy of the research hypotheses are examined by using Spearman correlation and Chi-square test. The research results indicates that the personal characteristics including openness, Agreeableness, Conscientiousness and also job satisfaction and experience of working with financial software of the Users, is efficient on the effectiveness of the accounting information systems computer-based.
Performance Assessment for LTE-Advanced Networks with Uniform Fractional Guard Channel over Soft Frequency Reuse Scheme  [PDF]
Mahammad A. Safwat, Hesham M. El-Badawy, Ahmad Yehya, Hosni El-Motaafy
Wireless Engineering and Technology (WET) , 2013, DOI: 10.4236/wet.2013.44024
Abstract:

Dropping probability of handoff calls and blocking probability of new calls are two important Quality of Service (QoS) measures for LTE-Advanced networks. Applying QoS for Cell edge users in soft frequency reuse scheme in LTE system is a challenge as they already suffer from limited resources. Assigning some resources for handover calls may enhance dropping probability but this is in price of degradation in the blocking probability for new calls in cell-edge. Uniform Fractional Guard Channel (UFGC) is a call admission policy that provides QoS without reserving resources for handover calls. In this paper, the performance of Soft Frequency Reuse (SFR) in presence of Uniform Fractional Guard Channel (UFGC) will be investigated using queuing analysis. The mathematical model and performance metrics will be deduced in this assessment. The impact of UFGC will be evaluated in edge and core part separately. Then the optimal value for the parameter of UFGC will be obtained to minimize the blocking probability of new calls with the constraint on the upper bound on the dropping probability of handoff calls.

Analysis of Different Call Admission Control Strategies and Its Impact on the Performance of LTE-Advanced Networks  [PDF]
Mahammad A. Safwat, Hesham M. El-Badawy, Ahmad Yehya, Hosni El-Motaafy
Communications and Network (CN) , 2014, DOI: 10.4236/cn.2014.62016
Abstract:

The call admission control (CAC) optimizes the use of allocated channels against offered traffic maintaining the required quality of service (QoS). Provisioning QoS to user at cell-edge is a challenge where there is limitation in cell resources due to inter-cell interference (ICI). Soft Frequency Reuse is ICI mitigation scheme that controls the distribution of resources between users. In this paper, the Impact of four CAC schemes (Cutoff Priority scheme (CP), Uniform Fractional Guard Channel (UFGC), Limited Fractional Guard Channel (LFGC), New Call Bounding (NCB) scheme) at cell-edge have investigated using queuing analysis in a comparative manner. The comparison is based on two criteria. The first criterion guarantees a particular level of service to already admitted users while trying to optimize the revenue obtained. The second criterion determines the minimum of number of radio resources that provides hard constraints in both of blocking and dropping probabilities. The four schemes are compared at different scenarios of new and handover call arrival rates.

Identification of genetic diversity of jarak pagar (jatropha curcas l.) in central java based on isoenzyme marker
AHMAD YUNUS
Biodiversitas , 2007,
Abstract: Jatropha curcas is one of the plant which produces the renewable fuel. At the present time, the problems of the jatropha are litle information about genetic information included genetic diversity on inter species at Central Java and even in Indonesia. The diversity of inter species can be known by isozyme traits, this marker provide clustering species. The objective of this research were to identify jatropha based on isozyme markers. This research was conducted on Mei until December 2006. The samples were obtained from Banyumas, Pati, Cilacap, Pemalang, Jepara, Kudus, Batang and Grobogan. Isozyme analysis was conducted on Central Laboratory, Sebelas Maret University. Analysis of isozyme were conducted with isozyme Alcohol dehydrogenase (ADH), Sorbitol dehydrogenase (SOD), Schimimate dehydrogenase (SHD) and Isocitrate dehydrogenase (IDH). Analysis of data used the metode of Cluster Metode Average Linkage with DICE coefficienct. The conclusion of this research were: based on analysis of enzyme sorbitol dehydrogenase (SOD) and schimimate dehydrogenase (SHD), spesies from Kudus I was different with other species, while based on Alcohol dehydrogenase (ADH) and Isocitrate dehydrogenase (IDH) showed that species from Grobogan has genetic similarity with Kudus I.
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