14 research outputs found
DINAMIKA LEMBAGA PENDIDIKAN ISLAM DI MINANGKABAU: DARI SURAU KE PESANTREN
No full textTujuan penelitian ini adalah untuk menjelaskan proses terjadinya perubahan lembaga pendidikan Islam di Minangkabau dari surau ke pesantren. Jenis penelitian ini adalah penelitian kepustakaan/library research. Metode yang digunakan adalah metode penelitian sejarah dengan langkah heuristik, kritik sumber, sintesis, dan penulisan. Sebagai temuan dari penelitian ini adalah pertama antara pendidikan surau dan pesantren memiliki perbedaan yang prinsip. Perbedaan yang paling prinsip adalah pada pendidikan surau suasana demokrasi sangat terbuka, pendidikan bukan hanya persoalan agama, tetapi juga persoalan sosial kehidupan, serta proses pembelajaran adat atau budaya. Sementara pada pendidikan pesantren kyai adalah orang yang paling dihormati dan berkah kyai sebagai jalan memperoleh pengetahuan, pendidikan terfokus pada agama. Kedua terjadinya transformasi surau ke pesantren bukan saja karena modernisasi pendidikan, tetapi politik pendidikan agama juga memiliki andil besar dalam perubahan tersebut. Ketiga secara konstitusi transformasi surau ke pesantren sangat bertentangan dengan konstitusi, karena tugas pemerintah adalah memajukan kebudayaan nasional sebagaimana termuat dalam pasal 32
Breakdown voltage and resistivity of MO and RBDPO mixture as potential liquid insulation at ambient temperature of transformers / Yusnida Mohd Yusof, Ahmad Farid Abidin and Mohd Abdul Talib Mat Yusoh
No full textThe paper presents an investigation based on an experimental work of the dielectric behaviour for transformer oil with palm oil at different mixture and temperature. The basic properties of transformers mineral insulating oil should be introduced to have a better understanding of dielectric strength of oil mixture. The author has highlighted oil resistivity and breakdown voltage (BDV) during the experimental work of Deodorized Palm Oil (RBDPO) mixed with transformer oil namely mineral oil (MO) at 40°C to 60°C. Testing was made at 40°C to 60°C according to IEC 156 standard by using AC Modul System circuit of Hi volt Power Diagnostic and Mega Ohm 1KV 3005A megger was used to evaluate the resistivity. The highest breakdown strength is achieved 44kv at 80% of RBDPO content. The result of resistivity that was influenced by temperature also presented
Characteristic study of flat spray nozzle by using particle image velocimetry (PIV) and ANSYS simulation method
No full textStudy the velocity and pressure exerted in front of the filter surface in the kitchen hood system by using ANSYS
No full textPreparation, Characterization and In Vitro Biological Evaluation of Nano-Tubular Polyoxometalate
No full textDevelopment of nano size drug delivery and targeting system without any side effect is main concern of researcher in the field of biomedical application. In this work, polyoxometalate based one-dimensional nano-tubular arrays have been designed by layer-by-layer (LBL) deposition method. These nanotubes were characterized by FT-IR, UV-vis., techniques and the morphology was studied by using SEM. The particle size analyzer was used to obtain the size range of the nanotubes which was found to be in the range is 80 to 200 nm. These nanotubes based polyoxometalates were further investigated to test the cytotoxicity and changes in the cell morphology under different concentrations. The results indicate that synthesized polyoxometalate based one-dimensional nano-tubular arrays are feasible for effective drug carriers without any lethal effect on cell and could be potentially useful vector for delivery of genes, antibodies, and proteins in future.SCI(E)ARTICLE74882-48871
Strain engineering effect on surprising magnetic semiconducting behavior in zigzag arsenene nanoribbons
No full textThe enduring goal in condensed matter physics is to search for controlled magnetism in semiconducting materials. Based on first principles DFT calculations, we systematically investigate the electronic and magnetic properties of zigzag arsenene nanoribbons (ZAsNRs). We find that metallic edge states originate in the middle of bulk band gap for different widths of ZAsNRs due to electronic instability. Besides, edge magnetism for different magnetic configurations of ZAsNRs, have been investigated to remove these instabilities. There occurs a transition from non-magnetic to magnetic and metallic to semi-conducting edge states and as a result an intra-edge antiferromagnetic (AFM) semiconducting ground state has been found. In order to tune the edge states, strain engineering is employed on magnetic ground state and found that at critical value of compressive strains (-6%), there happens a transition from magnetic to nonmagnetic (NM) and semiconductor to metal. We expect that these semiconducting properties can be controlled by edge magnetism and strain engineering and make ZAsNRs a best semiconducting material which can be used as promising candidate for device applications in semiconducting industry. (C) 2017 Elsevier B.V. All rights reserved.SCI(E)ARTICLE185-19013
Structural and magnetic properties of tetragonal perovskite BaFe1-xBixO3-[small delta]
No full textA series of BaFe1-xBixO3-[small delta] (0.09 [less-than-or-equal] x [less-than-or-equal] 0.35) has been synthesized by a traditional solid state method. They all crystallize in space group P4/mmm (with a = 4.0759(1) A, c = 4.0782(1) A for x = 0.15) confirmed by the combinational use of powder X-ray, synchrotron, neutron, and electron diffractions. The magnetic susceptibility measurements show that the antiferromagnetic transition for these materials occurs from 64 to 50 K
From nano-dendrite to nano-sphere of Co100-xNix alloy: Composition dependent morphology, structure and magnetic properties
No full textCo100-xNix (x = 0, 10, 20, 30, ..., 100) alloy nanostructures with controlled composition are prepared by hydrothermal method. The effects of composition on crystal structure, morphology, growth of nanostructure, and magnetic properties are described. The crystal structure is hexagonal closed pack (hcp) at x = 0, mixture of hcp and face-centered cubic (fcc) for 10 <= x <= 30, and purely fcc for x >= 40. The morphology is changed from nano-dendrite (x = 0) to flower like structure composed on spherical core and nanorods (x = 50) to nanosphere (x = 100). The isotropic (spherical shape) character increases with Ni Content. Compositional analyses show the controlled composition in nanostructure. The saturation magnetization is 156 emu/g at x = 0 and decreases linearly with alloy composition (x) to 55 emu/g at x = 100. The coercivity is 285 Oe at x = 0 (dendrite) and decrease gradually to 21 Oe at x = 80, and then increases to 146 Oe at x = 100. The effective anisotropy (K-eff) constant decreases gradually with alloy-composition and shows decaying exponential dependence on alloy-composition (x). Magnetic and structural properties are explained by combined consequences of composition and nanoscale effects. This study reveals that the composition of alloy plays important role in growth, morphology, crystal structure and hence, properties of nanostructure. (C) 2015 Elsevier B.V. All rights reserved.Natural Science Foundation of China [51371105, 51071023]SCI(E)[email protected]
Copper doped EuMnO3: synthesis, structure and magnetic properties
No full textA solid solution EuMn1-xCuxO3-delta (0 <= x <= 0.316) was synthesized by a traditional solid state reaction at 1150 degrees C. It crystallized into the Pnma space group, which was confirmed by powder X-ray and selected area electron diffraction. Magnetic susceptibility measurements showed that the two magnetic transitions for these materials occurred from 52 to 22 K and 45 to 20 K.National Key Basic Research Project of China [2010CB833103]; National Natural Science Foundation of China [21271014]SCI(E)[email protected]
Superconductivity of Perovskite Ba1-x Y (x) (Bi0.2Pb0.8)O3-delta
No full textSolid solution Ba1-x Y (x) (Bi0.2Pb0.8)O3-delta with 0.00 ae<currency> x ae<currency> 0.085 has been prepared by tradition high-temperature reaction under 840 A degrees C. X-ray and selected area electron diffraction data confirm that the samples in this solid solution crystallize in space group P1 at room temperature. X-ray photoelectron spectroscopy data indicate that the valence of bismuth in this solid solution is + 5 while the valence of lead is both + 2 and + 4. Temperature-dependent magnetic susceptibility and resistivity of the studied samples show that superconductivity can be observed for Ba1-x Y (x) (Bi0.2Pb0.8)O3-delta with 0.00 ae<currency> x ae<currency> 0.04. The transition temperature () decreases with the increase of Y in the sample, which is attributed to the increase of electronegativity of the cations.National Key Basic Research Project of China [2010 CB833103]; National Natural Science Foundation of China [21271014]; National Training Program of Innovation and Entrepreneurship for UndergraduatesSCI(E)ARTICLE71705-17123
