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Search Results: 1 - 10 of 265 matches for " Nasruddin Jaafar "
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A Malay version of the Child Oral Impacts on Daily Performances (Child-OIDP) index: assessing validity and reliability
Zamros Y.M. Yusof, Nasruddin Jaafar
Health and Quality of Life Outcomes , 2012, DOI: 10.1186/1477-7525-10-63
Abstract: The Child-OIDP index was translated from English into Malay. The Malay version was tested for reliability and validity on a non-random sample of 132, 11–12?year old schoolchildren from two urban schools in Kuala Lumpur. Psychometric analysis of the Malay Child-OIDP involved face, content, criterion and construct validity tests as well as internal and test-retest reliability. Non-parametric statistical methods were used to assess relationships between Child-OIDP scores and other subjective outcome measures.The standardised Cronbach’s alpha was 0.80 and the weighted Kappa was 0.84 (intraclass correlation?=?0.79). The index showed significant associations with different subjective measures viz. perceived satisfaction with mouth, perceived needs for dental treatment, perceived oral health status and toothache experience in the previous 3?months (p?<?0.05). Two-thirds (66.7%) of the sample had oral impacts affecting one or more performances in the past 3?months. The three most frequently affected performances were cleaning teeth (36.4%), eating foods (34.8%) and maintaining emotional stability (26.5%). In terms of severity of impact, the ability to relax was most severely affected by their oral conditions, followed by ability to socialise and doing schoolwork. Almost three-quarters (74.2%) of schoolchildren with oral impacts had up to three performances affected by their oral conditions.This study indicated that the Malay Child-OIDP index is a valid and reliable instrument to measure the oral impacts of daily performances in 11–12?year old urban schoolchildren in Malaysia.
HIV/AIDS-Related Knowledge Among Malaysian Young Adults: Findings From a Nationwide Survey
Wong Li-Ping,Chin Caroline-Kwong,Low Wah-Yun,Jaafar Nasruddin
Journal of the International AIDS Society , 2008, DOI: 10.1186/1758-2652-10-6-148
Abstract: Purpose HIV/AIDS poses a serious threat to young people, both in Malaysia and throughout the world. A nationwide cross-sectional survey was conducted to assess the knowledge, attitudes, and beliefs about HIV/AIDS among the Malaysian public. This article reports the findings of knowledge about HIV/AIDS among young adults. Methods A total of 1075 young adult respondents aged 15–24 years participated in this survey. The response rate was 82.2%. Results The data indicated that HIV/AIDS knowledge among the respondents was moderate, with a mean knowledge score of 20.1 out of 32 points. The great majority had adequate knowledge of the major routes of HIV transmission, but fewer were aware of other modes of transmission, such as tattooing and piercing, sharing personal items, and breast-feeding from an infected mother. The great majority knew that HIV is not transmitted by mosquito bites, sharing meals, casual contact, and using public swimming pools and toilets. Conclusion Misconceptions about HIV/AIDS exist although generally knowledge on HIV/AIDS transmission and prevention was accurate. Education and intervention programs are needed to increase the level of knowledge and awareness of HIV/AIDS. The findings have important implications for the development of primary HIV/AIDS prevention programs for young adults in Malaysia.
Tracking the Credit Collection Period of Malaysian Small and Medium-Sized Enterprises
Nasruddin Zainudin
International Business Research , 2009, DOI: 10.5539/ibr.v1n1p78
Abstract: Profits of a company depend upon its frequency of reinvestment, or turnover, of its capital. Frequent turnover would not be possible if collections are slow as they deny the company the use of its own capital. Credit collection period is, therefore, an important factor that may influence a company’s overall performance. Hence, this study explores the average collection period profile of 279 small and medium-sized manufacturing companies in Malaysia using the companies’ financial statements from 1999 through 2002. This paper also examines if different industry sector has different collection period. Then the study relates the average collection period to company financial performance as measured by operating profit on total assets. Finally, the study investigates if there is any relationship between collection period and company size. These relationships are then examined again after taking industry sub-sector into consideration.
Interval-Valued Vague Soft Sets and Its Application
Khaleed Alhazaymeh,Nasruddin Hassan
Advances in Fuzzy Systems , 2012, DOI: 10.1155/2012/208489
Abstract: Molodtsov has introduced the concept of soft sets and the application of soft sets in decision making and medical diagnosis problems. The basic properties of vague soft sets are presented. In this paper, we introduce the concept of interval-valued vague soft sets which are an extension of the soft set and its operations such as equality, subset, intersection, union, AND operation, OR operation, complement, and null while further studying some properties. We give examples for these concepts, and we give a number of applications on interval-valued vague soft sets. 1. Introduction Uncertain or imprecise data are inherent and pervasive in many important applications in areas such as economics, engineering, environmental sciences, social science, medical science, and business management. There have been a number of researches and applications in the literature dealing with uncertainties such as Molodtsov’s [1] who initiated the concept of soft set theory as a mathematical tool for dealing with uncertainties which is free, fuzzy set theory by Zadeh [2], rough set theory by Pawlak [3], vague set theory by Gau and Buehrer [4], intuitionistic fuzzy set theory by Atanassov [5], and interval mathematics by Atanassov [6]. Alkhazaleh et al. [7] also introduced the concept of fuzzy parameterized interval-valued fuzzy soft sets and established its application in decision making. Alkhazaleh et al. [8] further introduced soft multisets as a generalization of Molodtsov's soft set. Bustince and Burillo [9] studied the difference between vague soft sets and intuitionistic fuzzy soft sets. Furthermore, soft sets, soft groups, and new operation in soft set theory were studied by Aktas and Cagman [10], Ali et al. [11], Maji et al. [12–14], Jiang et al. [15], and Alhazaymeh et al. [16]. The purpose of this paper is to further extend the concept of vague set theory by introducing the notion of a vague soft set and deriving its basic properties. The paper is organized as follows. Section 1 is the introduction followed by Section 2 which is preliminaries of vague set and vague soft set. Section 3 presents the basic concepts and definitions for a vague soft set and a vague set and then redefines the concept of the intersection of two soft sets. Section 4 introduces the notion of an interval-valued vague soft set and discusses its properties. Concluding remarks and open questions for further investigation are provided in Section 5. 2. Preliminaries A soft set is a mapping from a set of parameters to the power set of a universe set. However, the notion of a soft set, as given in its
Menggagas Fotosintesis Buatan Hibrida berbasis Struktur Nano Porfirin
Nasruddin,Leenawati Limantara
Jurnal Nanosains & Nanoteknologi , 2009,
Abstract: Pengkajian tentang kemungkinan penggunaan struktur nano dari senyawa organik planar porfirin telah dilakukan untuk pengembangan fotosintesis buatan bermodel D-A dyad yang merupakan tiruan dari unit fotosintesis bakteri ungu. Struktur nano jenis nanotubes dan nanorods dari porfirin berpotensi sebagai bahan fotokonduktor dan dimungkinkan dapat dipakai dalam pengembangan model tersebut. Upaya ke arah tersebut juga diperkuat dengan bukti bahwa pada tahap pemanenan cahaya (light harvesting) dalam unit fotosintesis organisme bakteri hijau melibatkan struktur nano yang memiliki kemiripan karakteristik dengan porfirin nanotube dan nanorods tersebut. Struktur nano alami tersebut adalah batang pemanen cahaya ( harvestingt-rod element) yang tersusun dari Bakteriklorofil c secara penataan-diri (self assembly) alamiah, tanpa campur tangan dogma genetika. Berdasarkan pertimbangan tersebut, kami menjajaki adanya kemungkinan terlahirnya model fotosintesis buatan hibrida untuk konversi energi surya, yaitu sebuah unit fotosintesis buatan yang dapat diibaratkan sebagai upaya pencangkokan batang pemanen cahaya dari bakteri hijau ke dalam unit fotosintesis bakteri ungu guna optimasi pemanenan cahaya. Dalam realitas biologis, upaya pencangkokan tersebut tampaknya sukar dilakukan. Dalam konteks pengembangan D-A dyad, hal tersebut ditempuh dengan menerapkan struktur porfirin nanotubes atau nanorods ke dalam model fotosintesis buatan bermodel D-A dyad.
Ellisha Nasruddin,Reevany Bustami
Asian Academy of Management Journal , 2007,
Abstract: Within the current discourse and the often overly-commercialized hyperbole of branding and positioning, there is a particular area that has not been given due attention. Yet, with the rapid changes and the multiple crises of present-day realities, a frequently neglected area, emerges as vitally imperative. The troubles can be seen in both large as well as small businesses within Malaysia. This article, thus, aims to bring back ethics, one of the management blind-spots, into the center stage of branding and organizational transformation. The objectives of this article are two-fold: (1) to build a discussion on the value and importance of ethical branding through CSR initiatives and (2) to present a CSR ethical branding (CSR-EB) framework which delineates the content (yin) and context (yang), comprising seven pillars: pillar of ethical core, pillar of inner stakeholders, pillar of products and services, pillar of outer stakeholders, pillar of cultural context, pillar of spatial context, and pillar of temporal context.
Effects of Cultivar, Planting Period, and Fungicide Usage on Rice Blast Infection Levels and Crop Yield
Andi Nasruddin,Nur Amin
Journal of Agricultural Science , 2012, DOI: 10.5539/jas.v5n1p160
Abstract: Studies were separately conducted to determine the effects of cultivar, planting date, and fungicide usage on rice blast disease, caused by Pyricularia grisea (Cooke) Sacc. [= Magnaporthe grisea (Hebert) Barr] in Kecamatan Manggala, South Sulawesi Indonesia. The four rice varieties were IR-66, Cisantana, Cigeulis, and Filipin. The results showed that IR-66 was moderately resistant to leaf and neck blast, with the lowest percentage unfilled grains per panicle. Cisantana reacted moderately resistant to leaf blast, but moderately susceptible to neck blast. Cigeulis was moderately susceptible to leaf and neck blast, while Filipin showed a highly susceptible reaction to both leaf and neck blast, and a 31% plant population death due to the blast disease. With respect to planting dates (February 4, March 22, and May 16), plants transplanted in March had the highest leaf blast severity, neck blast incidence, and the lowest yield. Seven fungicides (four are recommended for use in rice in Indonesia: flusilazol, difenoconazole, difenokonazole+propikonazole, and carbendazim (6.2%)+mancozeb (73.8%)) and three generally used ones (menefoxam (4%)+mancozeb (64%), chlorothalonyl, and metalaxyl) which were evaluated against the rice blast disease, showed the recommended fungicides for use in rice to be more effective in suppressing blast and protecting yield, compared to the other fungicides.
UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution  [PDF]
Mohammed Thamer Jaafar
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.59010
Abstract: The present study deals with studied the essential requirements for photo-decoulorization of nigrosine dye with suspension solution of photocatalyst (ZnO), under 250 Watt UV-A light (Io = 1.47 \"\"10-7 ensien s-1). A kinetics study of photo-decolourization for this dye was obeyed to pseudo-first order. The best initial pH of decolorization at 25 mg/L of dye solution with 300 mg of ZnO was given a fast reaction at 8.17. The calculated activation energy for this photoreaction was found to be 31.549 kJ·mol-1. Thermodynamically, the reaction is exothermic and spontaneously. The efficiency of decolorizatio E% was 97.077 at 15 min that decreased with addition oxidant reagents such as H2O2, Fe2+ and mixture from them.
Neurogenetic Algorithm for Solving Combinatorial Engineering Problems
M. Jalali Varnamkhasti,Nasruddin Hassan
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/253714
Abstract: Diversity of the population in a genetic algorithm plays an important role in impeding premature convergence. This paper proposes an adaptive neurofuzzy inference system genetic algorithm based on sexual selection. In this technique, for choosing the female chromosome during sexual selection, a bilinear allocation lifetime approach is used to label the chromosomes based on their fitness value which will then be used to characterize the diversity of the population. The motivation of this algorithm is to maintain the population diversity throughout the search procedure. To promote diversity, the proposed algorithm combines the concept of gender and age of individuals and the fuzzy logic during the selection of parents. In order to appraise the performance of the techniques used in this study, one of the chemistry problems and some nonlinear functions available in literature is used.
Structural and Optical Properties of Znx-1MgxO Ceramic Composites  [PDF]
Zayani Jaafar Othman, Adel Matoussi
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.38076
Abstract: In the present work, we investigate the structural and optical properties of Znx-1MgxO composites prepared by the standard sintering method at 1200?C during 24 hours and doped with different percentages of magnesium x between 0% and 40%. For this purpose, we have used the X-ray diffraction (XRD) and the atomic force microscopy (AFM) to study the effect of the magnesium’s proportion on the crystalline and morphology proprieties of the obtained samples. XRD analysis showed that all films are polycrystalline with a hexagonal wurtzite structure, with an orientation of the grains according to directions (0002) and (10-10). The AFM characterisation show that the degree of surface roughness (RMS) increases with the increasing of MgO content. Optical properties of the ceramics were investigated by Absorbance and Reflectance measurements at room temperature in the wavelength range 200 - 2400 nm. Optical band gap energies (Eg) were determined. Further cathodoluminescence and dielectric measurements would be carried out to study the influence of MgO doping on the dielectric and luminescent properties of the ZnMgO ceramics.
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