Siti Hasmah Johari - Academia.edu (original) (raw)

Papers by Siti Hasmah Johari

Proses pembangunan yang amat pesat yang berlaku di Malaysia telah mengundang nilai dan budaya bar... more Proses pembangunan yang amat pesat yang berlaku di Malaysia telah mengundang nilai dan budaya barat yang tidak sihat meresap ke dalam masyarakat, terutamanya di kalangan remaja. Golongan remaja mula dipengaruhi oleh budaya yang tidak sihat seperti pergaulan bebas, bohsia, bohjan, hubungan seks sebelum nikah, kelahiran anak luar nikah, pengguguran haram, pelajar perempuan melacur diri dan permainan seks. Persoalannya di sini bagaimana mahasiswa-mahasiswai IPT yang sememangnya terbukti keintelektualannya darisegi akademik boleh terjerumus dalam permasalahan ini? Kertas kerja ini bertujuan untuk melihat fenomena permasalahan seksual remaja terutama mahasiswa IPT darisegi sebab dan akibat, keperluan kepada pendidikan seks dan sejauh mana pendekatan kaunseling boleh diaplikasikan oleh kaunselor dalam menangani segala permasalahan ini. Katakunci: Mahasiswa, permasalahan, seksual.

Tropical biomedicine, 2011

International Journal of Interactive Mobile Technologies (iJIM), 2010

This study investigated whether mobile learning via Short Message Service (SMS-learning) is accep... more This study investigated whether mobile learning via Short Message Service (SMS-learning) is accepted by the students enrolled in the distance learning academic programme in the Universiti Sains Malaysia. This study explored the impact of perceived usefulness, perceived ease of use and usability of the system to their acceptability. The survey was constructed using a questionnaire consisting of statements regarding the participantsâ?? demographics, experiences in and perception of using mobile learning via SMS, involving 105 students from management and sciences disciplines. The Rasch Model Analysis was used for measurement correspond to a 5 point Likert. Results indicated that the usability of the system contributed to be effectiveness in assisting the students with their study. Respondents agree that SMS-learning is easy, effective and useful to help them study. However, the results found that there has been a problem in mobile learning that less interaction with lecturers. It impl...

2015 IEEE Conference on Energy Conversion (CENCON), 2015

This paper describes an analysis of modern controller, which uses output voltage as feedback to r... more This paper describes an analysis of modern controller, which uses output voltage as feedback to regulate its output voltage to a desired value without steady-state oscillations with the aid of Matlab® & Simulink® simulation software. This methodology is proposed to develop modern controller for application on boost DC-DC converter system with no parasitic components in the circuit. It is implemented on the system by analyzing state-space modeling. By specifying switches' ON and OFF position and solving node equations of the corresponding circuit topology, a set of state-space equations for each topological mode are recorded. Power simulator (PSIM) simulation results obtained are used to validate this approach. The minimum inductor value and minimum current flow on boost converter are calculated to ensure it operates in continuous current mode. In comparison to the open-loop controllers, the closed-loop controllers consist of a state feedback controller, optimal controller, state feedback with the feed forward controller and integral controller are performed in simulation. These modern controllers are simulated to analyze transient response and percentage of overshoot of boost converter output voltage. If the output of the system is observable, a full state observer can also be implemented. All collected results are compared to find the best controller, which produces a minimum error.

2015 IEEE Conference on Energy Conversion (CENCON), 2015

Due to the high electricity demand and the decreasing of fossil fuel sources, most of the countri... more Due to the high electricity demand and the decreasing of fossil fuel sources, most of the countries around the world goes to renewable energy such as wind, tidal and photovoltaic (PV) for electricity generation. Among these, the study of PV as an alternative source for electricity generation has gain wide attention. One of the important aspects that should be considered in PV application is the use of grid connected multilevel inverter. This work focuses on three phase diode clamped multilevel inverter, capacitor clamped multilevel inverter and H-cascaded bridge multilevel inverter for connecting grid and PV application. These three types of multilevel inverters were simulated in Matlab-Simulink environment and a multicarrier pulse width modulation (PWM) was used for the control methods. The output waveforms of multilevel inverters are presented and comparison between these are given. The best topology for a grid connected multilevel inverter for PV application is recommended.

This study investigated whether using Short Message Service (SMS) mobile technology for mobile le... more This study investigated whether using Short Message Service (SMS) mobile technology for mobile learning is accepted by the students enrolled in the distance learning academic programme in the Universiti Sains Malaysia (USM). Technology Acceptance Model was employed as the theoretical foundation to predict SMS-learning usage amongst distance education students. Data was collected randomly from 45 distance learners from School of Distance Education, USM with the use of a structured self-administered questionnaire. The results indicated that both perceived ease of use (β = 0.413, p < 0.01) and perceived usefulness (β = 0.400, p < 0.01) were positively influence the intention to use SMS-learning. However, attitude toward using the SMS-learning has no influence on the usage intention. Thus, it can be concluded this preliminary study gives a glance of assumption on how the distance learners may perceive the learning through SMS to provide a foundation for future applications.

210 Pb is widely used as an atmospheric tracer as its parent, 222 Rn is continuously produced in ... more 210 Pb is widely used as an atmospheric tracer as its parent, 222 Rn is continuously produced in the atmosphere from soil emanation. This study was conducted to observe the changes of 210 Pb activity based on temporal and spatial factor using PM 10 samples. PM 10 were sampled by Malaysian Meteorological Department in four station consist of two station from both east and west coast of Peninsular Malaysia in 2007. Activity level of 210 Pb was determined using the Tennelec XLB-5 Gross Alpha-Beta Counter, Canberra, after the ingrowth of 210 Pb by the outgrowth of 210 Bi. Basically, the analysed result showed that three to four significant peaks during northeast monsoon, southwest monsoon and intermonsoon. For east coast which comprises Kuantan and Mersing stations, the highest 210 Pb activity in Kuantan was in April and June with 45.73 ± 3.66 mBq/kg and 48.20 ± 3.33 mBq/kg, respectively. While in Mersing, 210 Pb activity showed the highest in April and July with 45.77 ± 2.67 mBq/kg and 44.21 ± 2.42 mBq/kg, respectively. As for the west coast, it comprises Setiawan and Chuping stations. Setiawan station showed the highest 210 Pb activity in October and July with 48.90 ± 2.52 mBq/kg and 44.09 ± 2.34 mBq/kg, respectively. Chuping showed the highest 210 Pb activity in March and October with 39.96 ± 1.94 mBq/kg and 14.98 ± 0.80 mBq/kg, respectively. It shows that 210 Pb activity in Chuping is much lower than in Setiawan because of its location is in a rural area. This study showed that during southwest monsoon from May to September, it clearly showed that 210 Pb activity is higher in west coast than in east coast as wind sources come from southwest of Peninsular Malaysia.

Journal of Orthopaedic Science, 2014

pain (40.4 %), upper and lower back pain (33.3 %), and the least common region was elbow pain (3.... more pain (40.4 %), upper and lower back pain (33.3 %), and the least common region was elbow pain (3.5 %). Among 20 common physical activities in DMQ, 15 physical activities performed by the academicians in their workplace were considered as a physical risk factors for neck, shoulder, and back pain at p < 0.05. Conclusion The preliminary study demonstrated that neck pain, shoulder pain, and back pain were the most common WMSDs among the academicians in a higher learning institution.

Comprehensive Psychiatry, 2014

Objective: In 2004, the province of Aceh, Indonesia was rocked by tsunami and in September 2009, ... more Objective: In 2004, the province of Aceh, Indonesia was rocked by tsunami and in September 2009, West Sumatra, Indonesia was hit by an earthquake. The aim of this study was to determine the long-term psychological impact on the residents inhabiting these regions and to identify factors associated with it. Methods: A cross-sectional study was conducted among the residents. The Depression, Anxiety and Stress Scale (DASS) was used to measure their psychological well-being. Results: Out of 200 respondents, 1 in 5 (19%) was found to suffer from a high level of depression, 1 in 2 (51%) had anxiety and 1 in 5 (22%) experienced stress. Factors found to be significantly associated with depression, anxiety and stress were female, young age, unemployed, and single (p b 0.05). Conclusion: The psychological impact following the tsunami persisted in the population after many years post-disaster. It is recommended that the psychological profile of the population be evaluated for the vulnerable group following any natural disaster.

Human immunodeficiency virus (HIV)-infected individuals have greater susceptibility to infections... more Human immunodeficiency virus (HIV)-infected individuals have greater susceptibility to infections by a myriad of microorganisms which can cause significant morbidity and mortality compared to immunocompetent individuals. Of these microbial infections, intestinal parasitic infections (IPIs) however are receiving less attention than bacterial and viral infections, hence, the lack of information of parasitic infections in HIV individuals. Prevalence of IPIs among 346 HIV-infected individuals in Malaysia was determined in this study. The overall prevalence of intestinal parasitic infections (IPIs) was 37.9% (131 of 346) with protozoa infections (18.8%) being more common compared to helminth infections (7.5%). Observed protozoa include Entamoeba histolytica/dispar (16.8%), Cryptosporidium parvum (12.4%), Isospora belli (10.1%), Cyclospora cayetanensis (4.9%) and Giardia duodenalis (intestinalis) (3.2%) whilst helminthes which were detected comprised of Ascaris lumbricoides (13.9%), Trichuris trichiura (6.4%) and hookworms (0.6%). Among those 131 infected, 50.4% had multiple infections and 48.9% had single parasitic infection. The CD4 counts were significantly lower (i.e., 200 cells/mm³) in patients harbouring IPIs. Of those individuals infected with intestinal parasites, 49% were intravenous drug users and 58% were not on any antiretroviral therapy. Most were asymptomatic and had concurrent opportunistic infections (OIs) mainly with Mycobacterium tuberculosis infection. These results confirmed that IPIs are ubiquitous among HIV-infected individuals, especially those presenting with low CD4 T cells counts, and provide useful insights into the epidemiology of these infections among HIV-infected patients in Malaysia. It is therefore recommended, that diagnosis of these intestinal parasitic pathogens should be conducted on a routine basis for better management of gastrointestinal illnesses among HIV individuals.

Forthcoming: Special Track on Mashups for Learning, International Conference on Computer Aided Learning (ICL2009), 2009

ABSTRACT Classical tools for supporting software engineering teams (collaborative development env... more ABSTRACT Classical tools for supporting software engineering teams (collaborative development environment, CDE) are designed to support one team during the development of a product. Often the required data sources or experts reside outside of the internal project team and thus not provided by these CDEs. This paper describes an approach for a community-embedded CDE (CCDE), which is capable of handling multiple projects of several organizations, providing inter-project knowledge sharing and developer awareness. The presented approach uses the mashup pattern to integrate multiple data sources in order to provide software teams with an exactingly development environment.

This study investigated whether mobile learning via Short Message Service (SMS-learning) is accep... more This study investigated whether mobile learning via Short Message Service (SMS-learning) is accepted by the students enrolled in the distance learning academic programme in the Universiti Sains Malaysia. This study explored the impact of perceived usefulness, perceived ease of use and usability of the system to their acceptability. The survey was constructed using a questionnaire consisting of statements regarding the participants' demographics, experiences in and perception of using mobile learning via SMS, involving 105 students from management and sciences disciplines. The Rasch Model Analysis was used for measurement correspond to a 5 point Likert. Results indicated that the usability of the system contributed to be effectiveness in assisting the students with their study. Respondents agree that SMS-learning is easy, effective and useful to help them study. However, the results found that there has been a problem in mobile learning that less interaction with lecturers. It implies that the acceptability of students to this mode on communication and interaction is highly endorsed.

Problem statement: Anaerobic digestion was a biological method used to convert organic wastes int... more Problem statement: Anaerobic digestion was a biological method used to convert organic wastes into biogas and a stable product for land application without adverse environmental effects. The biogas produced could be used as an alternative renewable energy source. The aim of this study was to analyze the influence of total solid contents on biogas yield from cattle manure using fluid rumen inoculums. Approach: A series of laboratory experiments using 400 mL biodigester were performed in batch operation mode. Given 100 g of fresh cattle manure was fed to each biodigester and mixed with fixed 50 mL of rumen fluid and different volumes of tap water resulting six different Total Solid (TS) contents i.e., 2.6, 4.6, 6.2, 7.4, 9.2, 12.3 and 18.4%. Results: The results showed that the best performance for biogas production was the digester with 7.4 and 9.2% of total solid i.e., gave biogas yield 184.09 and 186.28 mL gVS −1 , respectively after 90 days observation. While the other TSs content of 2.6, 4.6, 6.2, 12.3 and 18.4% gave the biogas yield 115.78, 122.33, 172.34, 137.99 and 54.87 mL gVS −1 , respectively. Conclusion: These results suggested that, based on TS content effects to biogas yield, rumen fluid inoculum exhibit the similar effect with other inoculums. In all cases, there was no variation of pH, fat, protein and ash content in sludge after digestion at several variation of pH. During digesting, pH tends to increase to neutral pH i.e., optimum pH for methanogenic bacteria. The effect of rumen fluid concentration to biogas production will need to be studied in the next step research.

Abstrak: Proses pembangunan yang amat pesat yang berlaku di Malaysia telah mengundang nilai dan b... more Abstrak: Proses pembangunan yang amat pesat yang berlaku di Malaysia telah mengundang nilai dan budaya barat yang tidak sihat meresap ke dalam masyarakat, terutamanya di kalangan remaja. Golongan remaja mula dipengaruhi oleh budaya yang tidak sihat seperti pergaulan bebas, bohsia, bohjan, hubungan seks sebelum nikah, kelahiran anak luar nikah, pengguguran haram, pelajar perempuan melacur diri dan permainan seks. Persoalannya di sini bagaimana mahasiswa-mahasiswai IPT yang sememangnya terbukti keintelektualannya darisegi akademik boleh terjerumus dalam permasalahan ini? Kertas kerja ini bertujuan untuk melihat fenomena permasalahan seksual remaja terutama mahasiswa IPT darisegi sebab dan akibat, keperluan kepada pendidikan seks dan sejauh mana pendekatan kaunseling boleh diaplikasikan oleh kaunselor dalam menangani segala permasalahan ini. Katakunci: Mahasiswa, permasalahan, seksual. PENDAHULUAN Berdasarkan definisi daripada Encyclopedia Dictionary of Psychology (1992) pendidikan seksual merujuk kepada kursus formal tentang pengajaran pembiakan atau reproduktif yang diperkenalkan di bilik darjah atau di sekolah. Mohd. Amin (1996) menyatakan pendidikan seksual pada asasnya bertujuan untuk mengetahui diri sendiri dari aspek seksual dan membolehkan seseorang itu memahami apa yang berlaku pada dirinya sejak dilahirkan hingga dewasa. Pendidikan seksual membabitkan penjelasan, bimbingan dan kaunseling mengenai pemahaman seksual serta penjagaan kesihatan organ reproduktif. Ia memberikan pengetahuan mengenai seksualiti diri sendiri. Ia juga menyentuh mengenai aspek tidak normal dan tingkah laku yang tidak diingini berhubung dengan seks dan bahaya atau penyakit-penyakit berkaitan (Noor Zainal 2000). Sejak awal perkembangan psikologi, seks telah dipandang sebagai suatu kuasa dalaman yang utama dalam mengarah dan mempengaruhi gaya hidup seseorang. Ini dapat dikesan melalui penekanan Sigmunt Freud, pelopor psikologi dalam aliran psikoanalisis terhadap tenaga libido. Namun begitu sehingga kini seks masih merupakan suatu isu yang penuh dengan kontroversi dan sukar dibincangkan. Ini mungkin kerana norma-norma masyarakat timur telah diajar begitu. Lebih menyedihkan apabila golongan cerdik pandai yang akan memimpin negara suatu hari nanti iaitu golongan mahasisiwa juga terjebak dalam permasalahan ini. Seks di kalangan mahasiswa merupakan isu yang hangat diperkatakan hari ini sama ada di dada akhbar atau elektronik. Ia seolah-olah menggambarkan bahawa mahasiswa hari ini bukan sahaja bijak dalam mencari ilmu pengetahuan malahan bijak mencari keseronokan dunia. Seks seolah-olah kewajipan mereka walaupun tidak melalui perhubungan yang sah. Kertas kerja ini bertujuan untuk meneroka sejauhmanakah kepentingan pendidikan seksual untuk membentuk sahsiah mahasiswa.

Tropical biomedicine, 2011

International Journal of Interactive Mobile Technologies (iJIM), 2010

2015 IEEE Conference on Energy Conversion (CENCON), 2015

Journal of Orthopaedic Science, 2014

Comprehensive Psychiatry, 2014

Forthcoming: Special Track on Mashups for Learning, International Conference on Computer Aided Learning (ICL2009), 2009

This study investigated whether mobile learning via Short Message Service (SMS-learning) is accep... more This study investigated whether mobile learning via Short Message Service (SMS-learning) is accepted by the students enrolled in the distance learning academic programme in the Universiti Sains Malaysia. This study explored the impact of perceived usefulness, perceived ease of use and usability of the system to their acceptability. The survey was constructed using a questionnaire consisting of statements regarding the participants' demographics, experiences in and perception of using mobile learning via SMS, involving 105 students from management and sciences disciplines. The Rasch Model Analysis was used for measurement correspond to a 5 point Likert. Results indicated that the usability of the system contributed to be effectiveness in assisting the students with their study. Respondents agree that SMS-learning is easy, effective and useful to help them study. However, the results found that there has been a problem in mobile learning that less interaction with lecturers. It implies that the acceptability of students to this mode on communication and interaction is highly endorsed.