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Search Results: 1 - 10 of 551 matches for " Yousif Hamad "
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Investigating the Use of Combined Hydrogen, Heat and Power System for Omar AL-Mukhtar University Campus  [PDF]
Moutaz Benali, Tarek Hamad, Ahmad Belkhair, Yousif Hamad
Advances in Biological Chemistry (ABC) , 2019, DOI: 10.4236/abc.2019.91003
Abstract: This paper investigates the use of a combined hydrogen, heat, and power (CHHP) system for Omar Al-Mukhtar University campus using local resources. Based on previous local resource assessment studies, the hydrogen team of Omar AL-Mukhtar University (OMU) selected the fuelcell energy DFC4000TM unit. This study shows that the CHHP system can provide electricity to power the university campus, thermal energy for heating the anaerobic digester, and hydrogen for transportation, back-up power and other needs. Consequently, using the alternative fuels and renewable energy resources for OMU campus can lower fossil fuel consumption and, therefore, greenhouse gas emissions (GHG).
The Hydrogen Energy Potential of Solid Waste: A Case Study of Misrata City  [PDF]
Moutaz Benali, Tarek Hamad, Yousif Hamad, Ahmad Belkhair
Advances in Biological Chemistry (ABC) , 2019, DOI: 10.4236/abc.2019.92004
Abstract: This study presents an overview on solid waste that can be used as a source of bioenergy in Misrata including municipal solid waste (MSW), industrial solid waste (ISW), and healthcare solid waste (HSW) as biomass sources. The management of solid waste and valorization is based on an understanding of MSW’s and HSW’s composition and physicochemical characteristics. Of MSW’s, the results show that organic matter represents 59% of waste, followed by paper-cardboard 12%, miscellaneous 10%, plastic 8%, metals 7% and glass 4%. While HSW comprised of 72% general healthcare waste (non-risk) and 28% hazardous waste. The average general waste composition was: 38% organic, 24% plastics, and 20% paper. The potential of hydrogen energy produced from biogas in Misrata including MSW, and other organic feedstock such as food and kitchen waste, animal wastes, clover and reeds, wheat residues, barley residues, HSW and sewage waste as biomass sources. The total potential hydrogen output is estimated to be around 10,265 tons per year.
Experimental Study of Biogas Production from Cow Dung as an Alternative for Fossil Fuels  [PDF]
Moutaz Benali, Tarek Hamad, Yousif Hamad
Journal of Sustainable Bioenergy Systems (JSBS) , 2019, DOI: 10.4236/jsbs.2019.93007
Abstract: To treat the problem of fossil fuel usage and greenhouse gas emissions, biogas is considered a potential source of clean renewable energy. The aim of the work is to analyze the amount of biogas and ph from cow dung when an anaerobic digester operates in the mesophilic mode. In this study is presented the experimental investigation of biogas production from cow dung as an alternative energy resource. This is work using an 18 Liters capacity plastic as prototype biogas plant, plant to inspect the anaerobic digestion in producing biogas. The digester was batch operated and daily gas produced from the plant was observed for 30 days. The digester was fed within the ratio of 1:1 of dung to water respectively. The operating temperatures of the digester were maintained within mesophilic conditions. The Biogas production from cow dung fluctuates from the first day to the thirtieth day between 0 and 340 ml. The pH of cow dung is gradual reduction within the retention period.
Improving Adherence to Prescribed Antidiabetics and Cardiovascular Medications in Primary Health Care Centers in Nyala City, South Darfur State-Sudan  [PDF]
Ahmed Dahab Ahmed, Asim Ahmed Elnour, Mirghani Abd Elrahman Yousif, Farah Hamad Farah, Hasab Alrasoul Akasha Ahmed Osman, Abobakr Abasaeed
Pharmacology & Pharmacy (PP) , 2013, DOI: 10.4236/pp.2013.49098

Aims: Prospective pharmacist’s interventions aimed to improve patient’s knowledge and behaviors to adhere to medications in patients with type 2 diabetes with or without cardiovascular medical conditions in primary health care (PHCs) centers in Nyala city, South Darfur State, Sudan. Methodology and Materials: 300 patients were enrolled for assessing adherence with the Brief Medication Questionnaire (BMQ) in ten PHCs in Nyala city. We assessed patients’ responses to BMQ pre-and post-interventions plan by: complex interventions, humanitarianism and disease outcomes determined by health-related outcomes (SF-36), glycosylated hemoglobin (HbA1c) and blood pressure. Results: BMQ scores have improved significantly in four screens (pre-and post-interventions): regimen [4.6 ± 0.2 to 1.8 ± 0.1; P =

Design and Implement of a Programmable Logic Controller (PLC) for Classical Control Laboratory  [PDF]
Yousif I. Al Mashhadany
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.31006
Abstract: The design and implementation of a classical control system laboratory based on PLC control system is introduced in this paper. To design and implement the system, two parts must be produced. The first is software for PLC and the second is hardware for experiments related to the programs. The PLC control system used in the design is LS industrial system company GM7-DR40A 24/16 Digital I/O and single Analog I/O module, two photoelectric sensors from Atonic company’: the first with the model BR100-DDT-P, and the second BEN10M-TFR. An approximate sensor with 5-sides is detected, four of CMOS BCD-7-Segment driven by CD4511B, two relays: 2-poles and 3-poles, six voltages and an ammeter measurement, DC motor and 24 VDC power supply and many connecters and pinions. Satisfactory results are obtained by executing twenty four experiments for classical control theory that fulfill the requirements of control theory in undergraduate stage and replace the old experiments executed by PID controller where the practice system is implemented by PLC control now.
Design and Implementation of Electronic Control Trainer with PIC Microcontroller  [PDF]
Yousif I. Al Mashhadany
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.33025
Abstract: This paper describes the implementation of a PIC microcontroller in a conventional laboratory-type electronic trainer. The work comprises software for the PIC and hardware for the software. The PIC controller uses an EasyPIC6 board and includes a PC-interfaced programmer for the PIC chip. It has many external modules: 128 × 64 graphic LCD display, 2 × 16 LCD display, 4 × 4 keypad, and port expander, all in the same bench. The trainer is capable of 36 experiments in logic/analogue electronic and control systems. A 5-sided approximate sensor, two photoelectric sensors (BR56-DDT-P and BEN9M-TFR), four CMOS, four BCD-7-segment driven by CD4511B, two relays (2-pole and 3-pole), six voltages, ammeter measurement, DC motor, and 24VDC power supply, connect through connectors and pinions. Results of all the experiments show the trainer satisfying requirements of undergraduate and postgraduate projects involving conventional electronic and classical control systems.
Double Parton Scattering in Associate Higgs Boson Production with Heavy Quarks at the LHC  [PDF]
Mohammad Yousif Hussein
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.44A001

Higgs boson production in association with heavy quarks is one of the most important discovery channels for Higgs particles in the Standard Model and its super-symmetric extension at the LHC pp collider. We review the status of the Higgs boson studies, with particular emphasis on the case bbh and tth production. We present results for the total cross section at Large Hadron Collider (LHC) in both single and double parton scattering mechanism.

Quality of Nursing Courses as Perceived by Students: Relationship with Their Academic Achievement in Palestine College of Nursing  [PDF]
Yousif Mahmoud Awad
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.51005
Abstract: The purpose of this study was to determine the Bachelor Science of Nursing (BSN), student’s perceptions of the quality of nursing courses taught at Palestine College of Nursing (PCN), which were fundamentals of nursing course, adult nursing course, pediatric nursing course, maternity nursing course, community nursing course, mental health and psychiatric nursing course and nursing management and leadership course, and its relationship with their academic achievement. The Palestine College of Nursing is governmental and Ministry of Health (MOH) affiliated. The sample included 467 nursing students registered in the college who studied the previously mentioned nursing courses. Data were collected using a self-administered questionnaire developed by the researcher, and guided by literature. That was to assess the included nine quality dimensions of the nursing courses as perceived by the students. Content validity and reliability tests were done for the tool. The study revealed that the total students’ perceptions of the quality of all nurses courses were within average quality level (80.42%). The nursing management course and community health nursing course were of the first two ranks of high quality level (84.54%, and 84.48%, respectively), where mental health and psychiatric nursing course, fundamentals of nursing course, adult health nursing course, pediatric nursing course and maternity health nursing course were the next ranks of average quality level. The study revealed that students’ perceptions of seven dimensions from nine were with average quality level (80.50%). The first rank was the “teacher/instructor characteristics and attributes”, dimension of high quality level (84.44%), while the last rank was “teaching methodology” dimension of average quality level (77.54%). There was a positive relationship between students’ achievement and the courses’ quality dimensions, pertaining objectives of the course, contents of the course, teacher/instructor competencies, teacher characteristics, teaching methodology, students/teacher interaction and course evaluation. The study recommended improving the quality of nursing courses for better level and to improve the quality of some dimensions like using different teaching strategies, the quality of clinical settings, and improve the quality of nursing instructors in some clinical areas. Finally the researcher recommend for further studies about concerning quality in nursing education.
Near Rough and Near Exact Subgraphs in Gm-Closure Spaces
Yousif Yaqoub Yousif
International Journal of Computer Science Issues , 2012,
Abstract: The basic concepts of some near open subgraphs, near rough, near exact and near fuzzy graphs are introduced and sufficiently illustrated. The Gm-closure space induced by closure operators is used to generalize the basic rough graph concepts. We introduce the near exactness and near roughness by applying the near concepts to make more accuracy for definability of graphs. We give a new definition for a membership function to find near interior, near boundary and near exterior vertices. Moreover, proved results, examples and counter examples are provided. The Gm-closure structure which suggested in this paper opens up the way for applying rich amount of topological facts and methods in the process of granular computing.
Performance Enhancement of SOVA Based Decoder in SCCC and PCCC Schemes  [PDF]
Ahmed A. Hamad
Wireless Engineering and Technology (WET) , 2013, DOI: 10.4236/wet.2013.41006

This study proposes a simple scaling factor approach to improve the performance of parallel-concatenated convolutional code (PCCC) and serial concatenated convolutional code (SCCC) systems based on suboptimal soft-input soft-output (SISO) decoders. Fixed and adaptive scaling factors were estimated to mitigate both the optimistic nature of a posteriori information and the correlation between intrinsic and extrinsic information produced by soft-output Viterbi (SOVA) decoders. The scaling factors could be computed off-line to reduce processing time and implementation complexity. The simulation results show a significant improvement in terms of bit-error rate (BER) over additive white Gaussian noise and Rayleigh fading channel. The convergence properties of the suggested iterative scheme are assessed using the extrinsic information transfer (EXIT) chart analysis technique.


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