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The Use of Multimedia Learning Resource Sharing (MLRS) in Developing Sharing Knowledge at Schools
Munir 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.9
This study aimed to develop school community to share knowledge by using Multimedia Learning Resource Sharing (MLRS). MLRS was developed as a means for educators and learners across schools to share online based internet. To measure MLRS’s acceptance as a medium of sharing knowledge, Technology Acceptance Model (TAM) was used as a model of approach. This study tried to explore factors that were dominant, interrelated and influential to the level of MLRS’s acceptance in sharing knowledge. Structural Equation Modeling (SEM) was used to analyze the data. The present study revealed that user Content Management (CM) affected Perceived Ease of Use (PEoU), while Content management (CM) and PEoU affected the benefits of Perceived Usefulness (PU). PEoU and PU affected Intention to Use (ITU); and ITU affected Actual System Usage (ASU). In general, the presence of MLRS received a positive acceptance from users in developing sharing knowledge between Senior High schools in West Java.
Lateral Crushing Properties of Non-Woven Kenaf (Mat)- Reinforced Epoxy Composite Hexagonal Tubes
Munir Faraj Almbrouk Alkbir,Mohd Sapuan b. Salit,Nuraini bt. Abdul Aziz,Mohamad Ridzwan Ishak 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.7
The current study investigated the energy absorption capability and load carrying capacity of non-woven natural kenaf fiber (mat)/ epoxy–hexagonal composite tubes subjected to a lateral quasi-static crushing test. The hexagonal composite tubes were manufactured by the hand lay-up technique. Natural non-woven kenaf (mat) was chosen as reinforcement due to low cost, low specific weight, easy processing, no need for tooling when dealing with the raw material, and no skin irritation and epoxy resin was used as the matrix to manufacture three configurations of β=40o, β=50o and β=60o of natural non-woven kenaf (mat)/epoxy laminate. The effects of hexagonal angles, supporting plate inside the tubes, and failure modes were studied by a lateral compression test. The crashworthiness of the tubes was evaluated by analysis of the specific energy absorption in quasi-static lateral compression. Specific energy absorption (SEA) was obtained from the load–displacement curve during testing. The failure mode of the tubes was analyzed from high-resolution photographs. Overall, the tube with β=40o had the best crashworthiness among the tubes. Furthermore, the results showed that the tubes with supporting plates have better specific energy absorption for all tested specimens and exhibited approximately 69% better crashworthiness than the non-supporting ones. The results also demonstrated that all specimens failed by the longitudinal failure mode.
Uranium tetrafluoride production at pilot scale using a mercury electrode cell
Munir Dides,Jose Hernandez,Luis Olivares 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.5
This work shows the technical feasibility to obtain uranium tetrafluoride through an electrochemicalmercury cell. This technique represents a custom scaling-up methodology from our previous studies toobtain UF4 using the dropping mercury electrode cell. The UF4 products were obtained from natural UF6gas, which was hydrolyzed to obtain a 50 g/L UO2F2 solution. The electrolysis cell was made using amercury reservoir, to reach UF4 production rates of 1 Kg UF4/day. This custom design allowed a stable UF4production thanks to the mercury cathode, which do not permit the accumulation of solid products in itssurface. The cell was tested using current densities from 5.000 to 17.500 A/m2 and temperatures from 25to 65 C. The maximum current efficiency achieved under these conditions was 80%. The UF4 powderspossessed spherical morphology, with diameters between 20 and 80 mm. Compared to the SnCl2 precipitation, this process did not allow preferential growth of the precipitates. This improved thecompaction of the UF4 e Mg powders mixtures, with densities between 3.0 and 3.5 g/cm3. The purity ofthe UF4 products was over 98%.
Polyelectrolytes functionalized nematic liquid crystal-based biosensors: An overview
Munir, S.,Kang, I.K.,Park, S.Y. Elsevier Scientific Pub. Co 2016 Trends in analytical chemistry Vol.83 No.2
<P>The liquid crystalline state of matter arises from orientation-dependent and non-covalent interactions between molecules within condensed phases. Because the balance of intermolecular forces that underlies the formation of liquid crystals (LCs) is delicate, this state of matter can be easily perturbed by external stimuli in general, and therefore it has been applied to biosensors since the last two decades. LCs has been functionalized with polyelectrolytes (PEs) to obtain stability and specificity, and to facilitate the immobilization of enzymes, anti bodies, and ligands at the LC/aqueous interface. This review focuses on the LC/aqueous interface functionalized with various kinds of PEs that yield a fundamentally interesting and technologically promising class of interfaces, and their uses for chemical and biological sensing. (C) 2016 Elsevier B.V. All rights reserved.</P>
Munir, Junaid,DeMiguel-Ramos, Mario,Lee, Hyunjoo Jenny,Saeed, Mohammad Alam,Iborra, Enrique IEEE 2017 Journal of microelectromechanical systems Vol.26 No.6
<P>Most of the applications of solidly mounted resonator need the compensation of temperature coefficient of resonant frequency. The presence of materials with different properties in the stack makes it complicated to explain the influence of each material individually on temperature coefficient. To reduce design and fabrication costs, an accurate and precise modeling of the resonators is required. In this paper, Mason model and finite-element analysis are used to design the resonators and results for both models, which are almost similar, are presented. Different kinds of configuration (symmetric and asymmetric, according to the thickness of the layers) are designed to achieve the temperature coefficient of frequency as near-zero as possible with an optimized response. Such designs are fabricated and characterized obtaining measurements of the temperature coefficient of frequency. The result shows that useful and reliable information on the performance of resonators can be achieved with accurate modeling. [2017-0107]</P>
Munir A. ABBASI,Azlan AMRAN,Nazia Abdul REHMAN,Noor us SAHAR,Arif ALI 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5
The study examines the existence of twin deficit in two emerging economies (Turkey and Iran) and also investigates the relation of twin deficit with specific macroeconomic indicators such as the GDP, money supply, foreign direct investment, and the interest rate both in short and long-run periods. The twin-deficit concept refers to a situation where the current account deficit and budget deficits exist in the same corresponding period of an economy. This study employs the Bound Test Autoregressive lag distributed (ARDL) model on time-series quarterly secondary data of Turkey and Iran from 1992 to 2019. The stationarity of variables has been ensured through the Augmented Dickey-Fuller (ADF) test at the level and the first difference. The results reveal the existence of a twin deficit in both the short and long-run periods only in Iran. Its existence could not be observed in the Turkish economy. The findings suggest a positive relationship between twin deficit and GDP, and a negative relationship between twin deficit and FDI and M2. At the same time, the relationship of the twin deficit with interest rate could not be found in the Iranian economy. The findings may be helpful for economic managers of both countries in executing their economic policies.