Hassan Y Ibrahim - Academia.edu (original) (raw)
Papers by Hassan Y Ibrahim
In this paper, Novel method, Particle Swarm Optimization (PSO) algorithm, based technique is prop... more In this paper, Novel method, Particle Swarm Optimization (PSO) algorithm, based technique is proposed to estimate and analyze the steady state performance of self-excited induction generator (SEIG). In this novel method the tedious job of deriving the complex coefficients of a polynomial equation and solving it, as in previous methods, is not required. By comparing the simulation results obtained by the proposed method with those obtained by the well known mathematical methods, a good agreement between these results is obtained. The comparison validates the effectiveness of the proposed technique.
Asian journal of agriculture and rural development, 2012
The study assessed gender participation and decision making role in economic activities using dat... more The study assessed gender participation and decision making role in economic activities using data collected from 120 respondents. The results revealed that female participation was frequent in crop post-harvest activities and poultry management while male participation was frequent in crop pre-harvest operations only. Female respondents participated occasionally in home gardening, goat rearing, hair dressing and food processing. Educational level, years of experience, personal income and credit obtained significantly influenced the level of gender participation in economic activities. The Males always made decisions on selection of crop variety, spending money, saving money, buying of necessities, and children‟s education, while females always made decision on types of food for home consumption only. Age and income of respondents were the significant factors that influenced the level of gender involvement in decision making. Provision of credit facilities, sensitization on the impo...
Intellectual Discourse, 2017
The belief in the expected redeemer or the Mahdī is a well-known concept in the history of Islam.... more The belief in the expected redeemer or the Mahdī is a well-known concept in the history of Islam. However, the notion has been opened to several interpretations and misinterpretations from various Islamic sects, each asserting that its own version of the Mahdiyyah is authentic and valid. As a result, several Islamic movements were orchestrated under the banner of the Mahdiyyah; prominent among them in Africa are those of Muhammad Ibn Tumart (1080-1130), the patron of the Muwaḥḥidūn State in north Africa, Muḥammad AImad ibn ʿAbdullāh (1844-1885), the architect of the Mahdist State in the Sudan (1881-1898) and Sheikh ʿUsmān Dan Fodio (1754-1817), the founder of the Sokoto Caliphate. This article explores the authenticity of the notion of the Mahdiyyah in Islam, which constitutes the basis for the main discourse of the study, namely, the status of the Mahdiyyah as conceived by Sheikh Usman Dan Fodio, and the resultant impact of the Sheikh’s Mahdiyyah on the Sudanese Mahdiyyah.
Journal of applied microbiology, Jan 26, 2018
To screen the newly recorded alga Grateloupia doryphora in the Egyptian Mediterranean Sea for ant... more To screen the newly recorded alga Grateloupia doryphora in the Egyptian Mediterranean Sea for antimicrobial activity. Algal samples were collected from the Eastern Harbor, Alexandria, Egypt during summer (2016 and 2017). The dry and fresh methanolic, ethanolic and ethyl acetate algal extracts were tested against Bacillus subtilis, Enterococcus faecalis, and Staphylococcus aureus as gram-positive bacteria, Escherichia coli, Pseudomonas aeruginosa as gram-negative bacteria and one yeast strain Candida albicans. A three way analysis of variance (ANOVA) showed significant differences based on the algal form, type of solvents and microbial species. The fresh methanolic and ethyl acetate extracts had equal effects on the tested pathogens with means of 14.44 and 15.16, respectively. However, the fresh algal extract was more effective on all the tested organisms than the dried material, except for ethyl acetate and ethanol extract on B. subtilis (31 and 23 mm), respectively. In fact, P. aer...
Tropical and Subtropical Agroecosystems, Dec 26, 2012
international conference on control engineering and communication technology, Dec 7, 2013
This paper presents fuzzy controller for maximum power point tracking (MPPT) for photovoltaic sys... more This paper presents fuzzy controller for maximum power point tracking (MPPT) for photovoltaic system. The paper investigates the efficiency of direct coupling of dc pumping system with the photovoltaic and then when using the MPPT. The paper presents modeling and analysis for dc-dc boost converter. The pulse width modulation (PWM) of the considered converter is determined by the fuzzy controller output depending on the nature of the load and source. The insolation levels variation has been taken into account. The fizzy controller uses the error and change of error to determine the maximum power point at each insolation level. Finally comparison between fuzzy logic controller and direct connection has been carried out which has shown that, the effectiveness of fuzzy controller to draw much power and presents fast system response against change in working conditions is much better than direct coupling method.
Geologische Rundschau, 1981
AATCC Journal of Research, 2014
ABSTRACT A Ag-nanoparticle (Ag-NP) dispersion was successfully synthesized using a glucose/Ag-nit... more ABSTRACT A Ag-nanoparticle (Ag-NP) dispersion was successfully synthesized using a glucose/Ag-nitrate/polyvinyl pyrrolidone (PVP)/ sodium hydroxide reduction formulation. The resultant Ag-NP dispersion was successfully used alone and in combination with Disperse Orange 31 or Basic Blue 9 dyes to impart antibacterial properties against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria to polyester and polyacrylonitrile fabrics respectively using microwave treatment. An increase in Ag-NP dispersion concentration by 50% and prolonged microwave irradiation by two minutes significantly improved the antibacterial performance. The EDX spectrum of the Ag-NP loaded substrates confirmed the presence of elemental Ag (Ag0) on the fabrics’ surface. Addition of selected disperse or basic dye to the Ag-NP treatment bath produced disperse or basic dyeings with darker depth of shades and remarkable antibacterial functionality.
Research Journal of Microbiology, 2009
Applied Mechanics and Materials, 2014
Ground has been proven that it is able to supply cooling and heating resulting in significant red... more Ground has been proven that it is able to supply cooling and heating resulting in significant reduction of electricity consumption. This paper discusses potential of ground towards implementation of ground thermal storage by using ground heat exchanger (GHE) to supply passive cooling for any application. Analysis has been conducted based on empirical equation from conduction heat transfer for depth up to 6 m and thermal diffusivity from 0.04 to 0.1 m2/day. The main input parameters were obtained from local weather station for three consecutive years. The results showed that significant reduction of temperature occur at depth below than 2.0 m in which cooling can be supplied constantly throughout the year. Temperature amplitude also gets attenuated relatively with depth in which amplitude less than 1°C occur at depth more than 4 m for thermal diffusivity 0.04 m2/day. In addition, thermal diffusivity plays important role in determining ground temperature variation. It has been obtaine...
Pediatrics international : official journal of the Japan Pediatric Society, 2014
Thrombotic thrombocytopenic purpura (TTP) is a rare but life-threatening condition characterized ... more Thrombotic thrombocytopenic purpura (TTP) is a rare but life-threatening condition characterized by thrombotic microangiopathy. The standard treatment for TTP is plasmapheresis. For refractory or relapsing cases, various immunosuppressive agents have been tried, and among them rituximab has shown promising results. TTP is rarer in the pediatric age group and the use of rituximab in children with TTP is limited. Reported herein is the successful treatment of relapsing autoimmune TTP with rituximab in a 12-year-old girl.
Applied Mechanics and Materials, 2014
Malaysia has an abundance of renewable energy resources. However, the implementation proved to be... more Malaysia has an abundance of renewable energy resources. However, the implementation proved to be difficult, as many factors have to be considered, mainly economical factor. Furthermore, currently there is no known framework to establish the feasibility study of renewable energy technology implementation. This paper serves as an initial study on the application of fit-viability framework for the implementation of RE technology, focussing in Malaysia. A simple case study has been performed based on the Feed-in Tariff mechanism, an the fit-viability framework proved to be useful in RE technology consideration.
Chemical Engineering and Science, 2014
Journal of Agricultural Science, 2010
Journal of Agricultural Science, 2010
Measurement Science and Technology, 2011
Tropospheric delay is one of the dominant global positioning system (GPS) errors, which degrades ... more Tropospheric delay is one of the dominant global positioning system (GPS) errors, which degrades the positioning accuracy. Recent development in tropospheric modeling relies on implementation of more accurate numerical weather prediction (NWP) models. In North America one of the NWP-based tropospheric correction models is the NOAA Tropospheric Signal Delay Model (NOAATrop), which was developed by the US National Oceanic and
Journal of Perinatology, 2004
In this paper, Novel method, Particle Swarm Optimization (PSO) algorithm, based technique is prop... more In this paper, Novel method, Particle Swarm Optimization (PSO) algorithm, based technique is proposed to estimate and analyze the steady state performance of self-excited induction generator (SEIG). In this novel method the tedious job of deriving the complex coefficients of a polynomial equation and solving it, as in previous methods, is not required. By comparing the simulation results obtained by the proposed method with those obtained by the well known mathematical methods, a good agreement between these results is obtained. The comparison validates the effectiveness of the proposed technique.
Asian journal of agriculture and rural development, 2012
The study assessed gender participation and decision making role in economic activities using dat... more The study assessed gender participation and decision making role in economic activities using data collected from 120 respondents. The results revealed that female participation was frequent in crop post-harvest activities and poultry management while male participation was frequent in crop pre-harvest operations only. Female respondents participated occasionally in home gardening, goat rearing, hair dressing and food processing. Educational level, years of experience, personal income and credit obtained significantly influenced the level of gender participation in economic activities. The Males always made decisions on selection of crop variety, spending money, saving money, buying of necessities, and children‟s education, while females always made decision on types of food for home consumption only. Age and income of respondents were the significant factors that influenced the level of gender involvement in decision making. Provision of credit facilities, sensitization on the impo...
Intellectual Discourse, 2017
The belief in the expected redeemer or the Mahdī is a well-known concept in the history of Islam.... more The belief in the expected redeemer or the Mahdī is a well-known concept in the history of Islam. However, the notion has been opened to several interpretations and misinterpretations from various Islamic sects, each asserting that its own version of the Mahdiyyah is authentic and valid. As a result, several Islamic movements were orchestrated under the banner of the Mahdiyyah; prominent among them in Africa are those of Muhammad Ibn Tumart (1080-1130), the patron of the Muwaḥḥidūn State in north Africa, Muḥammad AImad ibn ʿAbdullāh (1844-1885), the architect of the Mahdist State in the Sudan (1881-1898) and Sheikh ʿUsmān Dan Fodio (1754-1817), the founder of the Sokoto Caliphate. This article explores the authenticity of the notion of the Mahdiyyah in Islam, which constitutes the basis for the main discourse of the study, namely, the status of the Mahdiyyah as conceived by Sheikh Usman Dan Fodio, and the resultant impact of the Sheikh’s Mahdiyyah on the Sudanese Mahdiyyah.
Journal of applied microbiology, Jan 26, 2018
To screen the newly recorded alga Grateloupia doryphora in the Egyptian Mediterranean Sea for ant... more To screen the newly recorded alga Grateloupia doryphora in the Egyptian Mediterranean Sea for antimicrobial activity. Algal samples were collected from the Eastern Harbor, Alexandria, Egypt during summer (2016 and 2017). The dry and fresh methanolic, ethanolic and ethyl acetate algal extracts were tested against Bacillus subtilis, Enterococcus faecalis, and Staphylococcus aureus as gram-positive bacteria, Escherichia coli, Pseudomonas aeruginosa as gram-negative bacteria and one yeast strain Candida albicans. A three way analysis of variance (ANOVA) showed significant differences based on the algal form, type of solvents and microbial species. The fresh methanolic and ethyl acetate extracts had equal effects on the tested pathogens with means of 14.44 and 15.16, respectively. However, the fresh algal extract was more effective on all the tested organisms than the dried material, except for ethyl acetate and ethanol extract on B. subtilis (31 and 23 mm), respectively. In fact, P. aer...
Tropical and Subtropical Agroecosystems, Dec 26, 2012
international conference on control engineering and communication technology, Dec 7, 2013
This paper presents fuzzy controller for maximum power point tracking (MPPT) for photovoltaic sys... more This paper presents fuzzy controller for maximum power point tracking (MPPT) for photovoltaic system. The paper investigates the efficiency of direct coupling of dc pumping system with the photovoltaic and then when using the MPPT. The paper presents modeling and analysis for dc-dc boost converter. The pulse width modulation (PWM) of the considered converter is determined by the fuzzy controller output depending on the nature of the load and source. The insolation levels variation has been taken into account. The fizzy controller uses the error and change of error to determine the maximum power point at each insolation level. Finally comparison between fuzzy logic controller and direct connection has been carried out which has shown that, the effectiveness of fuzzy controller to draw much power and presents fast system response against change in working conditions is much better than direct coupling method.
Geologische Rundschau, 1981
AATCC Journal of Research, 2014
ABSTRACT A Ag-nanoparticle (Ag-NP) dispersion was successfully synthesized using a glucose/Ag-nit... more ABSTRACT A Ag-nanoparticle (Ag-NP) dispersion was successfully synthesized using a glucose/Ag-nitrate/polyvinyl pyrrolidone (PVP)/ sodium hydroxide reduction formulation. The resultant Ag-NP dispersion was successfully used alone and in combination with Disperse Orange 31 or Basic Blue 9 dyes to impart antibacterial properties against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria to polyester and polyacrylonitrile fabrics respectively using microwave treatment. An increase in Ag-NP dispersion concentration by 50% and prolonged microwave irradiation by two minutes significantly improved the antibacterial performance. The EDX spectrum of the Ag-NP loaded substrates confirmed the presence of elemental Ag (Ag0) on the fabrics’ surface. Addition of selected disperse or basic dye to the Ag-NP treatment bath produced disperse or basic dyeings with darker depth of shades and remarkable antibacterial functionality.
Research Journal of Microbiology, 2009
Applied Mechanics and Materials, 2014
Ground has been proven that it is able to supply cooling and heating resulting in significant red... more Ground has been proven that it is able to supply cooling and heating resulting in significant reduction of electricity consumption. This paper discusses potential of ground towards implementation of ground thermal storage by using ground heat exchanger (GHE) to supply passive cooling for any application. Analysis has been conducted based on empirical equation from conduction heat transfer for depth up to 6 m and thermal diffusivity from 0.04 to 0.1 m2/day. The main input parameters were obtained from local weather station for three consecutive years. The results showed that significant reduction of temperature occur at depth below than 2.0 m in which cooling can be supplied constantly throughout the year. Temperature amplitude also gets attenuated relatively with depth in which amplitude less than 1°C occur at depth more than 4 m for thermal diffusivity 0.04 m2/day. In addition, thermal diffusivity plays important role in determining ground temperature variation. It has been obtaine...
Pediatrics international : official journal of the Japan Pediatric Society, 2014
Thrombotic thrombocytopenic purpura (TTP) is a rare but life-threatening condition characterized ... more Thrombotic thrombocytopenic purpura (TTP) is a rare but life-threatening condition characterized by thrombotic microangiopathy. The standard treatment for TTP is plasmapheresis. For refractory or relapsing cases, various immunosuppressive agents have been tried, and among them rituximab has shown promising results. TTP is rarer in the pediatric age group and the use of rituximab in children with TTP is limited. Reported herein is the successful treatment of relapsing autoimmune TTP with rituximab in a 12-year-old girl.
Applied Mechanics and Materials, 2014
Malaysia has an abundance of renewable energy resources. However, the implementation proved to be... more Malaysia has an abundance of renewable energy resources. However, the implementation proved to be difficult, as many factors have to be considered, mainly economical factor. Furthermore, currently there is no known framework to establish the feasibility study of renewable energy technology implementation. This paper serves as an initial study on the application of fit-viability framework for the implementation of RE technology, focussing in Malaysia. A simple case study has been performed based on the Feed-in Tariff mechanism, an the fit-viability framework proved to be useful in RE technology consideration.
Chemical Engineering and Science, 2014
Journal of Agricultural Science, 2010
Journal of Agricultural Science, 2010
Measurement Science and Technology, 2011
Tropospheric delay is one of the dominant global positioning system (GPS) errors, which degrades ... more Tropospheric delay is one of the dominant global positioning system (GPS) errors, which degrades the positioning accuracy. Recent development in tropospheric modeling relies on implementation of more accurate numerical weather prediction (NWP) models. In North America one of the NWP-based tropospheric correction models is the NOAA Tropospheric Signal Delay Model (NOAATrop), which was developed by the US National Oceanic and
Journal of Perinatology, 2004