71 research outputs found
Linear and nonlinear optical efficiency of novel neodymium nanoparticles doped tellurite glass for advanced laser glass
No full textThe determination of linear and nonlinear optical efficiency of glass materials is crucial in extensive optical applications especially the laser glass. Nanoparticles appear to be an excellent dopant to improve the efficiency of laser glass. In this paper, the novel neodymium nanoparticles (NPs) doped tellurite glass had been fabricated for the first time via melt-quenched technique. The existence of nanoparticles in the glass network was proved by Transmission Electron Microscope (TEM) image with an average size of 20 nm. The structural parameter of TeO3 non-bridging oxygen was determined by FTIR analysis. The optical parameters of neodymium NPs doped tellurite glass were characterized by UV-Vis spectrometer, photoluminescence and Z-scan technique. The optical band gap energy of the glass network was reduced in the range of 3.178 - 3.209. The upconversion emission of the laser glass excited at 800 nm was found in the ultraviolet region. The optical efficiency of neodymium NPs doped tellurite glass exhibited excellent properties for its application in laser glass
Authorship Characteristics in Sekitar Perpustakaan 1994-2003: A Bibliometric Study
Get PDFThis bibliometric study attempts to explore the authorship characteristics in Sekitar Perpustakaan, one of the earliest library and information science (LIS) periodicals published by the National Library of Malaysia (PNM – Perpustakaan Negara Malaysia) since 1977. A total of 148 articles published in 20 issues of Sekitar Perpustakaan covering the period 1994-2003 were analyzed. Author characteristics such as name, gender, status, institutional affiliation, language preference of articles and authorship of articles were obtained, studied and analyzed. The findings reveals single-authored articles far outnumbered multi-authored articles at 79%; female contributors (65.74% or 71 authors) predominates male contributors (34.26% or 37 authors); middle-level professionals were the largest contributors of articles (59.3%); 83 (56%) of the articles published were in Bahasa Melayu, the national language, while 65 (44%) articles were in English; the top ranked contributor is Ding Choo Ming, Senior Research Fellow of Institute of the Malay World & Civilization, Universiti Kebangsaan Malaysia with nine contributions; and the most prolific institution is PNM with 41 contributing authors
Influence of erbium concentration on spectroscopic properties of tellurite based glass
No full textErbium zinc borotellurite, {[(TeO2)0.70(B2O3)0.30]0.7 (ZnO)0.3}1-y (Er3O2)y glasses were
prepared by rapid melt-quenching method. The structural properties of the glass
samples were determined by using x-ray diffraction (XRD) method and was confirmed
its amorphous nature. The FTIR analysis shows that the Erbium Oxide increases the
number of non-bridging oxygen that affects the bonding structure of TeO2, ZnO and
B2O3. The absorption edge gives the value of band gap Eopt and Urbach energy ?E. The
value of Eopt lies between 3.025 eV and 3.440 eV for indirect band gap and between
3.500 eV to 3.680 eV in the direct band gap. The Urbach energy shows non-linear with
the concentration of Erbium Oxide and varies within 0.153 eV and 0.200 eV
An insight into the practical budgeting for productions of production houses / Shahrul Azlan Mohd. Zulkifli
Get PDFThis project paper is done with the intention of gaining an insight into the practical aspect of budgeting applied by the management of a Production House for its productions. The study was deemed essential as there were many grouses about the film industry being not so financially lucrative. There were a number of failed financial ventures into this glamourous industry. The creative and artistic elements of this business field have been discussed many a time in various media and sometimes with a touch of nostalgia. However, only a few have touched on the financial and management aspects. Thus the author would like to gain an insight into a component of that important but least studied aspect of the business, that is budgeting and how it is practised in this highly creative and artistic business in Malaysia
Implementation of total quality management (TQM) and management by objectives (MBO) in university / Shaiful Azlan Abdul and Wan Kalthom Yahya
Get PDFOrganization can practices any techniques or styles of management. It depends on the type of industry, the nature of business and the condition of the market and environment. MBO has been debated for more than 25 years either it work or not. TQM was popular in lately 80 's and early 90 'so Some company had proven successful after applied this concept and plan. UiTM is undergone of TQM and is still under process. The author trying to suggest how these concepts will be implemented without lessens each other. The suggestion and proposal will work in university environment
Role of Nd3+ nanoparticles on enhanced optical efficiency in borotellurite glass for optical fiber
No full textThe main problem of commercial silicate glass fiber is its high-loss and weak optical efficiency. It is very important to produce non-silicate glass fiber with low-loss and high optical efficiency. In this work, low-loss and high optical efficiency of Nd3+ nanoparticles doped borotellurite glass had been produced. The analysis of FTIR spectra shows the presence of functional vibration of tellurite network. The refractive index of borotellurite glass was enhanced in between 1.947 and 2.045 with the increment of Nd3+ nanoparticles. Several excitation bands within UV–Vis range due to the effect of Nd3+ nanoparticles was perceived originating from the ground state 4I9/2 to the excited states 2P3/2, 4G7/2, 4G5/2, 4F9/2, 4F7/2, 4F5/2 and 4F3/2. The glass system shows tendency towards semiconducting behavior as the value of Fermi energy, EF decreases. The high intensity of red emission was found from Nd3+ nanoparticles doped borotellurite glass. Hence, this Nd3+ nanoparticles doped borotellurite glass has immense potential for the development of fiber amplifiers and lasers. Keywords: Borotellurite glass, Neodymium nanoparticles, Rare-earth oxid
The effect of country image and University reputation: Where to study?
Get PDFThe study focuses to know either country image or university reputation is more dominant in attracting students who have planned to further study. The samples have been taken from all over Malaysia. The analysis part use SEM and Multiple Regression to show the results. The findings show that both country image and university reputation are important. They must come together
Pengaplikasian etika kerja Islam oleh pengamal perhubungan awam di organisasi berteraskan Islam di Malaysia
No full textPengamal perhubungan awam merupakan perantara atau mediator di antara organisasi dengan publik. Dengan itu etika merupakan di antara elemen terpenting untuk dititikberatkan oleh pengamal perhubungan awam dalam menjalankan tugasnya. Kajian ini bertujuan untuk mengkaji pengaplikasian Etika Kerja Islam (EKI) oleh pengamal perhubungan awam serta bagaimanakah EKI boleh membantu dan mempengaruhi pengamal perhubungan awam menjalankan tugas secara beretika. Kajian ini menggunakan kaedah penyelidikan kualitatif melalui temu bual mendalam secara bersemuka beserta penelitian dokumen untuk tujuan tringulasi. Bagi temu bual mendalam secara bersemuka, responden yang terlibat merupakan 10 orang pengamal perhubungan awam yang bertugas di organisasi berteraskan Islam di Malaysia. Manakala, penelitian dokumen pula melibatkan penelitian ke atas laman web rasmi organisasi serta laporan tahunan dan buletin bulanan organisasi yang bertujuan mengesahkan dapatan kajian yang diperolehi melalui temu bual mendalam. Hasil kajian mendapati, pengaplikasian EKI oleh pengamal perhubungan awam adalah bertepatan dengan konsep dan idea EKI yang dibincangkan oleh para tokoh dan sarjana terkemuka EKI. Hasil kajian juga mendapati, EKI memberikan pengaruh positif dalam amalan perhubungan awam dari sudut profesionalisma, motivasi diri, kualiti kerja serta integriti diri pengamal perhubungan awam itu sendiri
Open questions and recent advances in the control of a multi-host infectious disease: animal tuberculosis
No full textAnimal tuberculosis (TB) control is globally important for public health, economics and conservation. Wildlife species are often part of the Mycobacterium tuberculosis complex (MTC) maintenance community, complicating TB control attempts. We describe the current knowledge on global TB distribution and the significance of wildlife hosts; identify insufficiently known aspects of host pathology, ecology and epidemiology; present selected time series in wildlife TB; and summarize ongoing research on TB control, providing additional insight on vaccination. Six specific research needs are identified and discussed, namely: 1) complete the world map of wildlife MTC reservoirs and describe the structure of each local MTC host community; 2) identify the origin and behaviour of generalized diseased individuals within populations, and study the role of factors such as co-infections, re-infections and individual condition on TB pathogenesis; 3) quantify indirect MTC transmission within and between species; 4) define and harmonize wildlife disease monitoring protocols, and apply them in a way that allows proper population and prevalence trend comparisons in both space and time; 5) carry out controlled and replicated wildlife TB control experiments using single intervention tools; 6) analyse cost-efficiency and consider knowledge transfer aspects in promising intervention strategies. We believe that addressing these six points would push ahead our capacities for TB control. A remaining question is whether or not interventions on wildlife TB are at all justified. The answer depends on the local circumstances of each TB hotspot, and is likely to evolve during our collective progress towards TB control in livestock and in wildlife.TB research funding was provided via a Plan Nacional grant AGL2011-30041 (MINECO, Spain and FEDER) and an EU FP7 grant WildTBvac #613779. The corresponding author acknowledges additional support from Campus de Excelencia Internacional (CYTEMA). Azlan Che Amat acknowledges a grant from the Malaysian Government.Peer Reviewe
Razor clam (Ensis directus) shell as a low-cost adsorbent for the removal of Congo red and Rhodamine B dyes from aqueous solution
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