Hanifah Hanifah | Gajayana - Academia.edu (original) (raw)
Uploads
Papers by Hanifah Hanifah
Arabian Journal of Geosciences
Integrated geophysical techniques including resistivity image, vertical electrical sounding (VES)... more Integrated geophysical techniques including resistivity image, vertical electrical sounding (VES), and seismic refraction have been conducted to investigate the Wadi Hanifah water system. The groundwater in Wadi Hanifah has problems caused by the high volumes of sewage water percolating into the ground. The combination of VES, resistivity image, and seismic refraction has made a valuable contribution to the identification of the interface between the contaminated and fresh water in Wadi Hanifah area. The contaminated groundwater has lower resistivity values than fresh groundwater due to the higher concentration of ions which reduces the resistivity. Resistivity image and sounding in this area clearly identified the nature of the lithological depth and proved useful at identifying water-bearing zones. Fresh groundwater was found in the study area at a depth of 100 m within the fractured limestone. Water-bearing zones occur in two aquifers, shallow contaminated water at 10 m depth in alluvial deposits and the deeper fresh water aquifer at a depth of about 100 m in fractured limestone. The interface between the contaminated water (sanitary water) and fresh water marked out horizontally at 100 m distance from the main channel and vertically at 20 m depth. تم إستخدام تقنيات جيوفيزيائية متكاملة وهى الإنكسار السيزمى، وصور المقاومية والسبر الكهربى العمودى فى دراسة النظام المائى بمنطقة وادى حنيفة، فقد ظهرت بها مشاكل عديدة فى المياه بسبب التدفقات العالية لمياه الصرف الصحى داخل طبقات الأرض. وقد ساهمت الطرق المستخدمة فى فصل المياه الملوثة عن المياه العذبة بكفاءة عالية ، حيث ثبت أن المياه الملوثة تتميز بمقاومية عالية عن المياه العذبة وأن هذا يرجع إلى نسبة التركيز العالية للأيونات التى تختزل المقاومية. وقد بينت نتائج كلا من صور المقاومية والسبر الكهربائى نوعية الرواسب بالمنطقة، وكذلك أعماق الطبقات الحاملة للمياه. وقد أمكن التوصل الى مناطق تجمع المياه فى خزانين جوفيين، الأول مياه سطحية ملوثة على عمق 10 متر فى الرسوبيات الطميية، أما الثانى فهو خزان للمياه العذبة على عمق 100 متر فى صخور الحجر الجيرى المتشققة. تم تحديد الحد الفاصل بين المياه الملوثة والمياه العذبة أفقيا على مسافة 100 متر من القناة الرئيسية وعموديا على عمق 20 متر.
Cholera-specific surveillance in Indonesia was initiated to identify the introduction of the newl... more Cholera-specific surveillance in Indonesia was initiated to identify the introduction of the newly recognized Vibrio cholerae non-O1, O139 serotype. Findings from seven years (1993)(1994)(1995)(1996)(1997)(1998)(1999) of surveillance efforts also yielded regional profiles of the importance of cholera in both epidemic and sporadic diarrheal disease occurrence throughout the archipelago. A two-fold surveillance strategy was pursued involving 1) outbreak investigations, and 2) hospital-based case recognition. Rectal swabs were transported to Jakarta for culture and isolates were characterized by serotypic identification. Outbreak findings showed that V. cholerae O1, Ogawa serotype, was the predominant etiology in all 17 instances of investigated epidemic transmission. Monitoring of eight hospitals representing seven provinces provided 6,882 specimens, of which 9% were culture positive for V. cholerae: 589 (9%) for O1 and 20 (Ͻ 1%) for non-O1 strains. Proportional representation of V. cholerae O1 among cases of sporadic diarrheal illness was variable, ranging from 13% in Jakarta to Ͻ 1% in Batam. Overall, 98% of V. cholerae O1 cases were the Ogawa serotype. There was no instance of non-O1
Journal of Hospital Infection, 2004
This study reports on a new control and instrumentation system to automate the sterilisation proc... more This study reports on a new control and instrumentation system to automate the sterilisation process in palm oil mills. Image processing system is a non-destructive method to analysis and determine the oil content. The digital image technology is a process where the data from a sample can be retrieved without making physical experiment on the sample. In other words; the data can be obtained by looking at the image or picture of the product. Images, with the help of software, converted to digital number color form, red, green and blue (RGB). These data will be correlated with the corresponded data obtained from chemical analysis. By using the correlation between the two sets of data, new data can be predicted. The correlated data are used as a database to train the control system (Algorithm system) that responds accordingly. The response is transferred to the motor controlling the speed of the conveyor carrying the palm oil fruitlets. Optimizing the speed of the conveyor means optimizing the time of sterilisation and consequently enhance the whole process operation including cost saving and impact on the environment.
Acinetobacter of clinical isolates from the University of Malaya Medical Centre (UMMC), Kuala Lum... more Acinetobacter of clinical isolates from the University of Malaya Medical Centre (UMMC), Kuala Lumpur, to the species level by 16S rDNA sequencing.
PLOS One, 2011
Background: Malaria control programs require a detailed understanding of the contemporary spatial... more Background: Malaria control programs require a detailed understanding of the contemporary spatial distribution of infection risk to efficiently allocate resources. We used model based geostatistics (MBG) techniques to generate a contemporary map of Plasmodium falciparum malaria risk in Indonesia in 2010.
Engineering Fracture Mechanics, 2002
Delamination crack growth in laminated composites is investigated using experiments and finite el... more Delamination crack growth in laminated composites is investigated using experiments and finite element (FE) models. Tests are performed on cross-ply graphite/epoxy specimens under static conditions. The load-displacement response is monitored in the tested coupons along with crack length. The FE models employ a cohesive layer that is used to simulate the debonding and crack propagation. The cohesive parameters are calibrated from the experimental load-displacement curves. Crack growth and strain measurements are compared with those from the FE models. The predicted results from the FE models are in good agreement with the test results. The same modeling approach is also used to simulate crack propagation in the transverse direction of a notched laminate. The proposed FE analysis with cohesive layers can simplify fracture toughness assessment in multilayered specimens. Ó
Knowledge is seen as the most important strategic resource in organization. Knowledge sharing is ... more Knowledge is seen as the most important strategic resource in organization. Knowledge sharing is a mechanism for faculty members to capture, disseminate, transfer and apply useful knowledge. This study is to examine the factors and barriers which contribute to successful knowledge sharing among Higher Institutions Education (HIEs) faculty members in Malaysia. A crosssectional survey is used as a methodology for data collection. The factors of knowledge sharing for this study are nature of knowledge, working culture, staff attitudes, motivation to share and opportunities to share. The study shows that there is a significant relationship between knowledge sharing with all of the factors for private university, but it is insignificant for public university. This is due to certain factors such as university infrastructure, working culture and staff attitude. However for both HIEs, most of the factors are positively correlated.
A procedure is one of the most important elements that should be emphasized when handling any inc... more A procedure is one of the most important elements that should be emphasized when handling any incident related with the cyber world. It is easily forgotten by many organizations, IT administrator and users, especially when dealing with the worms attack. Using the incident response methodology as the basis to build up the STAKCERT framework, the researchers have proposed this novel framework which helps to increase the efficiency in handling worm incident, thus facilitate the process of responding to the worm incident. The STAKCERT framework consists of 2 phases where in phase 1, a novel standard operating procedure in worm detection and analysis have been introduced. In phase 2 of the framework, the worm isolation procedure is inspired by apoptosis. Apoptosis is also known as cell programmed death borrowed from the biology term.
Journal of Hospital Infection, 1992
A total of 434 methicillin-resistant Staphylococcus aureus (MRSA) baseline isolates were collecte... more A total of 434 methicillin-resistant Staphylococcus aureus (MRSA) baseline isolates were collected from subjects enrolled in a prospective, double-blind randomized trial comparing linezolid versus vancomycin for the treatment of nosocomial pneumonia. Isolates were susceptibility tested by broth microdilution, examined for inducible clindamycin resistance by D-test, and screened for heterogeneous resistance to vancomycin (hVISA) by the Etest macromethod. All strains were subjected to Panton-Valentine leukocidin (PVL) screening, and SCCmec, pulsed-field gel electrophoresis (PFGE), and spa typing. Selected strains were evaluated by multilocus sequence typing (MLST). Clonal complexes (CCs) were assigned based on the spa and/or MLST results. Most strains were CC5 (56.0%), which originated from North America (United States) (CC5-MRSA-SCCmec II/IV; 70.0%), Asia (CC5-MRSA-II; 14.0%) and Latin America (CC5-MRSA-I/II; 12.3%). The second-and third-most-prevalent clones were CC8-MRSA-IV (23.3%) and CC239-MRSA-III (11.3%), respectively. Furthermore, the CC5-MRSA-I/II clone predominated in Asia (50.7% within this region) and Latin America (66.7%), followed by CC239-MRSA-III (32.8% and 28.9%, respectively). The European strains were CC8-MRSA-IV (34.5%), CC22-MRSA-IV (18.2%), or CC5-MRSA-I/II/IV (16.4%), while the U.S. MRSA isolates were CC5-MRSA-II/IV (64.4%) or CC8-MRSA-IV (28.8%). Among the U.S. CC8-MRSA-II/IV strains, 73.7% (56/76 [21.2% of all U.S. MRSA strains]) clustered within USA300. One strain from the United States (USA800) was intermediate to vancomycin (MIC, 4 g/ml)
Arabian Journal of Geosciences
Integrated geophysical techniques including resistivity image, vertical electrical sounding (VES)... more Integrated geophysical techniques including resistivity image, vertical electrical sounding (VES), and seismic refraction have been conducted to investigate the Wadi Hanifah water system. The groundwater in Wadi Hanifah has problems caused by the high volumes of sewage water percolating into the ground. The combination of VES, resistivity image, and seismic refraction has made a valuable contribution to the identification of the interface between the contaminated and fresh water in Wadi Hanifah area. The contaminated groundwater has lower resistivity values than fresh groundwater due to the higher concentration of ions which reduces the resistivity. Resistivity image and sounding in this area clearly identified the nature of the lithological depth and proved useful at identifying water-bearing zones. Fresh groundwater was found in the study area at a depth of 100 m within the fractured limestone. Water-bearing zones occur in two aquifers, shallow contaminated water at 10 m depth in alluvial deposits and the deeper fresh water aquifer at a depth of about 100 m in fractured limestone. The interface between the contaminated water (sanitary water) and fresh water marked out horizontally at 100 m distance from the main channel and vertically at 20 m depth. تم إستخدام تقنيات جيوفيزيائية متكاملة وهى الإنكسار السيزمى، وصور المقاومية والسبر الكهربى العمودى فى دراسة النظام المائى بمنطقة وادى حنيفة، فقد ظهرت بها مشاكل عديدة فى المياه بسبب التدفقات العالية لمياه الصرف الصحى داخل طبقات الأرض. وقد ساهمت الطرق المستخدمة فى فصل المياه الملوثة عن المياه العذبة بكفاءة عالية ، حيث ثبت أن المياه الملوثة تتميز بمقاومية عالية عن المياه العذبة وأن هذا يرجع إلى نسبة التركيز العالية للأيونات التى تختزل المقاومية. وقد بينت نتائج كلا من صور المقاومية والسبر الكهربائى نوعية الرواسب بالمنطقة، وكذلك أعماق الطبقات الحاملة للمياه. وقد أمكن التوصل الى مناطق تجمع المياه فى خزانين جوفيين، الأول مياه سطحية ملوثة على عمق 10 متر فى الرسوبيات الطميية، أما الثانى فهو خزان للمياه العذبة على عمق 100 متر فى صخور الحجر الجيرى المتشققة. تم تحديد الحد الفاصل بين المياه الملوثة والمياه العذبة أفقيا على مسافة 100 متر من القناة الرئيسية وعموديا على عمق 20 متر.
Cholera-specific surveillance in Indonesia was initiated to identify the introduction of the newl... more Cholera-specific surveillance in Indonesia was initiated to identify the introduction of the newly recognized Vibrio cholerae non-O1, O139 serotype. Findings from seven years (1993)(1994)(1995)(1996)(1997)(1998)(1999) of surveillance efforts also yielded regional profiles of the importance of cholera in both epidemic and sporadic diarrheal disease occurrence throughout the archipelago. A two-fold surveillance strategy was pursued involving 1) outbreak investigations, and 2) hospital-based case recognition. Rectal swabs were transported to Jakarta for culture and isolates were characterized by serotypic identification. Outbreak findings showed that V. cholerae O1, Ogawa serotype, was the predominant etiology in all 17 instances of investigated epidemic transmission. Monitoring of eight hospitals representing seven provinces provided 6,882 specimens, of which 9% were culture positive for V. cholerae: 589 (9%) for O1 and 20 (Ͻ 1%) for non-O1 strains. Proportional representation of V. cholerae O1 among cases of sporadic diarrheal illness was variable, ranging from 13% in Jakarta to Ͻ 1% in Batam. Overall, 98% of V. cholerae O1 cases were the Ogawa serotype. There was no instance of non-O1
Journal of Hospital Infection, 2004
This study reports on a new control and instrumentation system to automate the sterilisation proc... more This study reports on a new control and instrumentation system to automate the sterilisation process in palm oil mills. Image processing system is a non-destructive method to analysis and determine the oil content. The digital image technology is a process where the data from a sample can be retrieved without making physical experiment on the sample. In other words; the data can be obtained by looking at the image or picture of the product. Images, with the help of software, converted to digital number color form, red, green and blue (RGB). These data will be correlated with the corresponded data obtained from chemical analysis. By using the correlation between the two sets of data, new data can be predicted. The correlated data are used as a database to train the control system (Algorithm system) that responds accordingly. The response is transferred to the motor controlling the speed of the conveyor carrying the palm oil fruitlets. Optimizing the speed of the conveyor means optimizing the time of sterilisation and consequently enhance the whole process operation including cost saving and impact on the environment.
Acinetobacter of clinical isolates from the University of Malaya Medical Centre (UMMC), Kuala Lum... more Acinetobacter of clinical isolates from the University of Malaya Medical Centre (UMMC), Kuala Lumpur, to the species level by 16S rDNA sequencing.
PLOS One, 2011
Background: Malaria control programs require a detailed understanding of the contemporary spatial... more Background: Malaria control programs require a detailed understanding of the contemporary spatial distribution of infection risk to efficiently allocate resources. We used model based geostatistics (MBG) techniques to generate a contemporary map of Plasmodium falciparum malaria risk in Indonesia in 2010.
Engineering Fracture Mechanics, 2002
Delamination crack growth in laminated composites is investigated using experiments and finite el... more Delamination crack growth in laminated composites is investigated using experiments and finite element (FE) models. Tests are performed on cross-ply graphite/epoxy specimens under static conditions. The load-displacement response is monitored in the tested coupons along with crack length. The FE models employ a cohesive layer that is used to simulate the debonding and crack propagation. The cohesive parameters are calibrated from the experimental load-displacement curves. Crack growth and strain measurements are compared with those from the FE models. The predicted results from the FE models are in good agreement with the test results. The same modeling approach is also used to simulate crack propagation in the transverse direction of a notched laminate. The proposed FE analysis with cohesive layers can simplify fracture toughness assessment in multilayered specimens. Ó
Knowledge is seen as the most important strategic resource in organization. Knowledge sharing is ... more Knowledge is seen as the most important strategic resource in organization. Knowledge sharing is a mechanism for faculty members to capture, disseminate, transfer and apply useful knowledge. This study is to examine the factors and barriers which contribute to successful knowledge sharing among Higher Institutions Education (HIEs) faculty members in Malaysia. A crosssectional survey is used as a methodology for data collection. The factors of knowledge sharing for this study are nature of knowledge, working culture, staff attitudes, motivation to share and opportunities to share. The study shows that there is a significant relationship between knowledge sharing with all of the factors for private university, but it is insignificant for public university. This is due to certain factors such as university infrastructure, working culture and staff attitude. However for both HIEs, most of the factors are positively correlated.
A procedure is one of the most important elements that should be emphasized when handling any inc... more A procedure is one of the most important elements that should be emphasized when handling any incident related with the cyber world. It is easily forgotten by many organizations, IT administrator and users, especially when dealing with the worms attack. Using the incident response methodology as the basis to build up the STAKCERT framework, the researchers have proposed this novel framework which helps to increase the efficiency in handling worm incident, thus facilitate the process of responding to the worm incident. The STAKCERT framework consists of 2 phases where in phase 1, a novel standard operating procedure in worm detection and analysis have been introduced. In phase 2 of the framework, the worm isolation procedure is inspired by apoptosis. Apoptosis is also known as cell programmed death borrowed from the biology term.
Journal of Hospital Infection, 1992
A total of 434 methicillin-resistant Staphylococcus aureus (MRSA) baseline isolates were collecte... more A total of 434 methicillin-resistant Staphylococcus aureus (MRSA) baseline isolates were collected from subjects enrolled in a prospective, double-blind randomized trial comparing linezolid versus vancomycin for the treatment of nosocomial pneumonia. Isolates were susceptibility tested by broth microdilution, examined for inducible clindamycin resistance by D-test, and screened for heterogeneous resistance to vancomycin (hVISA) by the Etest macromethod. All strains were subjected to Panton-Valentine leukocidin (PVL) screening, and SCCmec, pulsed-field gel electrophoresis (PFGE), and spa typing. Selected strains were evaluated by multilocus sequence typing (MLST). Clonal complexes (CCs) were assigned based on the spa and/or MLST results. Most strains were CC5 (56.0%), which originated from North America (United States) (CC5-MRSA-SCCmec II/IV; 70.0%), Asia (CC5-MRSA-II; 14.0%) and Latin America (CC5-MRSA-I/II; 12.3%). The second-and third-most-prevalent clones were CC8-MRSA-IV (23.3%) and CC239-MRSA-III (11.3%), respectively. Furthermore, the CC5-MRSA-I/II clone predominated in Asia (50.7% within this region) and Latin America (66.7%), followed by CC239-MRSA-III (32.8% and 28.9%, respectively). The European strains were CC8-MRSA-IV (34.5%), CC22-MRSA-IV (18.2%), or CC5-MRSA-I/II/IV (16.4%), while the U.S. MRSA isolates were CC5-MRSA-II/IV (64.4%) or CC8-MRSA-IV (28.8%). Among the U.S. CC8-MRSA-II/IV strains, 73.7% (56/76 [21.2% of all U.S. MRSA strains]) clustered within USA300. One strain from the United States (USA800) was intermediate to vancomycin (MIC, 4 g/ml)