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Search Results: 1 - 10 of 500571 matches for " K. M. Ahmed "
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The Use of Bleaching Creams among Central Sudan Students, 2010  [PDF]
Abubakr K. Yousif, Aimun AE. Ahmed, Abdalla E. Idris, M. O. Elmustafa, Elham H. S. Ahmed
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.55063
Abstract:

The aim of this study was to examine the use of bleaching creams containing hydroquinone, corticosteroids and mercury for skin lightening among higher secondary school students in central Sudan. A cross-sectional epidemiological study was conducted at 19 different girls’ schools. A total of 1187 young students aged 16 - 19 years old were randomly selected and approached, using a well-structured questionnaire. The main outcome measure was a number of epidemiological factors per abusers. Results revealed that, 55.4% of the respondents misused this product, whilst 51.6% of girls used cosmetics to lighten their skin for 1 - 3 years with skin irritations prevalence of 3.3%, and the face was reported as main application site (35.4%). In conclusion, the lack of health awareness and ignorance was the main causative factor, whilst education, competent authorities awareness and prescriptions restrictions were highly recommended.

Sequential Design vs. Integrated Design of Blended Learning of Informatics Subject Matter: Is There Any Effectiveness in Developing Cognitive Achievement and Achievement Motivation among Kuwaiti Female Secondary School Students  [PDF]
Hend K. H. Alraghaib, Abdellatif E. Elgazzar, Ahmed M. Nouby
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.32006
Abstract:

There has been a trend in recent years about discovering the effectiveness of implementing different designs of blended learning, in different learning tasks, different learning outcomes, and for different students. This research aimed at discovering the effectiveness of integrated design and sequential design of blended learning of Informatics Subject Matter in developing female secondary school students’ informatics cognitive achievement and achievement motivation—as in the research limitations. Developmental research method was implemented using quasi-experimental two experimental groups design of (22) female students in each group with pre and post tests. Cognitive knowledge aspects were derived through content analysis of the two Units “Advanced Web Concepts” from the Informatics Subject Matter, Instructional design standards list was developed for the two designs, The two blended learning designs were developed through implementing the Elgazzar (2014) ISD model for that Unit in accordance to those standards, two research tools were developed and approved for validity and reliability: Cognitive Achievement test and Achievement Motivation Scale. Research sample of (44) female students was selected and divided to two equal groups and randomly assigned to the research groups according to the specified experimental design. Research experiment was carried out by the first author with the pre and post implementations of the two research tools. Suitable statistical procedures were implemented to test the research hypotheses. Results reveal that there are significant differences at (α ≤ 0.05) among means of pre-post Cognitive Achievement test and Achievement Motivation scores of the two groups. Results also reveal that there aren’t significant comparative differences between means of posttests of Cognitive Achievement test and Achievement Motivation scores of the two designs of blended learning. So, the answer of the question: Is there any comparative Effectiveness between the two designs in Developing Cognitive Achievement and Achievement Motivation among Kuwaiti Female Secondary School Students? Is there isn’t any comparative effectiveness. Research report contains Tables, Figures, and References as well as lists of Recommendations and further researches.

A Novel Low-Complexity Low-Latency Power Efficient Collision Detection Algorithm for Wireless Sensor Networks  [PDF]
Fawaz Alassery, Walid K. M. Ahmed, Mohsen Sarraf, Victor Lawrence
Wireless Sensor Network (WSN) , 2015, DOI: 10.4236/wsn.2015.76006
Abstract: Collision detection mechanisms in Wireless Sensor Networks (WSNs) have largely been revolving around direct demodulation and decoding of received packets and deciding on a collision based on some form of a frame error detection mechanism, such as a CRC check. The obvious drawback of full detection of a received packet is the need to expend a significant amount of energy and processing complexity in order to fully decode a packet, only to discover the packet is illegible due to a collision. In this paper, we propose a suite of novel, yet simple and power-efficient algorithms to detect a collision without the need for full-decoding of the received packet. Our novel algorithms aim at detecting collision through fast examination of the signal statistics of a short snippet of the received packet via a relatively small number of computations over a small number of received IQ samples. Hence, the proposed algorithms operate directly at the output of the receiver's analog-to-digital converter and eliminate the need to pass the signal through the entire. In addition, we present a complexity and power-saving comparison between our novel algorithms and conventional full-decoding (for select coding schemes) to demonstrate the significant power and complexity saving advantage of our algorithms.
Performance Evaluation of Hybrid Green Roof System in a Subtropical Climate Using Fluent  [PDF]
S. F. Ahmed, T. Ahasan, M. G. Rasul, M. M. K. Khan, A. K. Azad
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24017
Abstract: Energy disaster is one of the major obstacles in the progress of human society. There are some on-going researches to overcome this for a sustainable environment. Green roof system is one of them which assist to reduce energy consumption of the buildings. The green roof system for a building involves a green roof that is partially or completely covered with vegetation and plant over a waterproofing membrane. Green roofs provide shade and remove heat from the air through evapotranspiration, reducing temperatures of the roof surface and the surrounding air. This paper reports the thermal performance of hybrid green roof system for a hot and humid subtropical climatic zone in Queensland, Australia. A thermal model is developed for the green roof system using ANSYS Fluent. Data were collected from two modelled rooms, one connected with green roof system and other non-green roof system. The rooms were built from two shipping containers and?installed at Central Queensland University, Rockhampton, Australia. Impact of air temperature on room cooling performance is assessed in this study. A temperature reduction of 0.95°C was observed in the room with green roof which will save energy cost in buildings. Only 1.7% variation in temperature was found in numerical result in comparison with experimental result.
Energy Scenario: Production, Consumption and Prospect of Renewable Energy in Australia  [PDF]
A. K. Azad, M. M. K. Khan, T. Ahasan, S. F. Ahmed
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24004
Abstract: Australia is the world’s 9th largest energy producer, 17th largest consumer of non-renewable energy resources and ranks 18th on a per person energy consumption basis.Australia’s energy consumption is primarily composed of non-renewable energy resources (coal, oil, gas and related products), which represent 96% of total energy consumption. Renewables, the majority of which is bioenergy (wood and wood waste, biomass, and biogas) combined with clear energy namely wind, solar hot water, solar electricity, hydroelectricity account for the remaining 4% consumption.Australia’s renewable energy resources are largely undeveloped which will contribute directly to the Australian economy. In this article, a review of literature on energy scenario is presented and discussed.Australia’s total energy production, consumption, storage and export (including renewable and non-renewable) data has been analyzed and discussed in this study. The main objective of the study is to analyze the prospect of renewable energy inAustralia. This study concludes that Australian economy will grow faster if its undeveloped renewable energies can be used efficiently for electricity generation and transport sector.
Prostate Cancer Diagnostic and Evaluation in Gaza-Strip, Palestine  [PDF]
Y. S. M. Alajerami, K. M. Abushab, S. I. Alagha, A. M. Beeram, Ahmed Najim, ? Roentgen
Health (Health) , 2015, DOI: 10.4236/health.2015.711169
Abstract: Prostate cancer has the third highest cancer incidence in Palestinian men with incidence rate about 4.5/100,000, and an increase in new cases by 50% between 2000 and 2015. Prostate cancer death rates have been obviously decreased in many countries due to treatment, precise screening. The current study aims to review and evaluate the new diagnosed prostate cancer in the Gaza Strip, Palestine. As a cross-sectional, quantitative and analytical approach based on structured review, the current study was conducted at Al-Shifa and European hospitals (main oncology departments in governmental hospitals). Interviews with newly diagnosed cancer prostate patients were carried out during the period of March and June, 2014; a total of 41 newly diagnosed with primary cancer prostate. Furthermore, demographic, health status, medical investigations and tests are reported from oncologists and hospital archives over the last five years (2010-2014). The current study showed that there were 41 new prostate cancer cases in three months with incidence rate 5.1 per 100,000. The highest rate of incidence was among the patients above age of 70+, 70 - 74 (29.3%). The results showed that 58.1% of the patients were smokers, and 22.6% used to smoke, while 16.1% responded they don’t smoke at all. The most common type of treatment used by participants was chemotherapy therapy followed by hormonal therapy and prostatectomy. The least common methods used for treatment were radiation therapy and combination of hormonal, radiation, and chemotherapy as only 5 participants used each type of these treatment options. The prevalence of prostate cancer was higher among men who lived in Gaza Governorate compared to other governorates. Limited use of radiation therapy was due to the unavailability of this treatment in Gaza Strip.
Valuation and Determination of Seven and Five Parameters of Photovoltaic Generator by Iterative Method  [PDF]
Ahmed Yahfdhou, M. M. Menou, A. M. Yahya, Ne. D. Eida, A. K. Mahmoud, Issakha Youm
Smart Grid and Renewable Energy (SGRE) , 2016, DOI: 10.4236/sgre.2016.79019
Abstract: The mathematical modeling of solar cells is essential for any optimization operation of the efficiency or the diagnosis of photovoltaic generator. The photovoltaic module is generally represented by an equivalent circuit whose parameters are experimentally calculated by using the characteristic current-tension, I-V. The precise determination of these parameters stays a challenge for the researchers, making to a big difference in the models and the digital methods dedicated to their characterizations. In the present paper, We are interested to characterize the parameters of single diode and two diodes models, in order to plan the behavior of the photovoltaic generator under real functioning conditions. We developed an identification method of the parameters using Newton Raphson method by using the software Matlab/Simulink. This method is the faster technique which allows the identification of several parameters and can be used in real time applications. The results of the proposed method show an accordance with the experimental and simulated characteristics of photovoltaic generator.
Developed New Procedure for Low Concentrations of Hydrazine Determination by Spectrophotometry: Hydrazine-Potassium Permanganate System  [PDF]
S. Ganesh, Fahmida Khan, M. K. Ahmed, P. Velavendan, N. K. Pandey, U. Kamachi Mudali
Journal of Analytical Sciences, Methods and Instrumentation (JASMI) , 2012, DOI: 10.4236/jasmi.2012.22018
Abstract: An indirect, sensitive and accurate method for the determination of trace amounts of hydrazine is described. In this proposed the spectrophotometric method is based on its reduction properties of hydrazine with a known concentration of potassium permanganate to reduce the colour. The absorbance of unreduced permanganate is measured the colour difference at different wavelengths 546 and 526 nm which show an absorption spectrum with hydrazine. Hydrazine can be determined in the range of 100 - 700 μg/ml with correlation coefficient of 0.999 and relative standard deviation 1%. The method is successfully applied for the determination of hydrazine in water streams in nuclear reactors/purex process/boiler water and polluted water samples.
Seasonal Variation in Rooting of Leafy Olive Cuttings
Mukhtar Ahmed,M. H. Laghari,Iftikhar Ahmed,K. M. Khokhar
Asian Journal of Plant Sciences , 2002,
Abstract: This study was conducted to assess the influence of season on rooting ability of olive cuttings during the year 2000-2001. Leafy semi-hard wood cuttings were taken from 10 years old olive tree of cultivar "Leccino". The length of cuttings ranged from 10 to 12 cm, with at least 3 to 4 leaves/cutting. The cuttings were collected at fortnightly interval commencing from 15th February to Ist April, 15th July to Ist November and 15th October to Ist December, 2000. The basal portion of the cuttings were treated with talcum powder containing 0.3% Indolebutyric acid (IBA). The treated cuttings were planted in coarse sand in fiber glasshouse under mist. The maximum temperature and relative humidity in fiber glasshouse was 25 to 35 ° C and 75 to 85% respectively. The highest rooting percentage (82%) was obtained in spring season cuttings on 15th February which was significantly higher than those obtained on the other times of the year. The other times of the years showing promise were 15th July and Ist March, where 70 and 65% of rooting was obtained respectively. The cuttings planted on Ist April produced significantly higher number of roots/cutting (13.5) than rest of planting period of the year. The higher plant survival percentage (90 to 93%) was observed in the cuttings planted during 15 Oct to Ist December.
Plant-Lore with Reference to Muslim Folksong in Association with Human Perception of Plants in Agricultural and Horticultural Practices
M. M. AHMED,P. K. SINGH
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 2008,
Abstract: The Muslims in the Manipur valley are a Manipuri speaking community. The study of folksong texts of Muslims in Manipur is a parameter for exploring native plant resources which certainly help to take conservation steps by examining the way of the human perception of plants. Man-plant interaction in agricultural as well as horticultural practices unfolds human dependence on plants in their various functions leading to a comfortable living. Some plants are used directly by men without any process, while some are selectively avoided. Tapping off heritage of ethnobotanical lore has been practiced by Muslims, conserving Pogostemon purpurascens Dalz in many graveyard for its religious significance. It has been proved that some plants are prevalent in the human language (proverbs, folksong, similies etc.) to make sense of their expression.
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