http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Transient Multipath routing protocol for low power and lossy networks
( M Ali Lodhi ),( Abdul Rehman ),( Meer M Khan ),( Muhammad Asfand-e-yar ),( Faisal Bashir Hussain ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.4
RPL routing protocol for low-power and lossy networks is an Internet Engineering Task Force (IETF) recommended IPv6 based protocol for routing over Low power Lossy Networks (LLNs). RPL is proposed for networks with characteristics like small packet size, low bandwidth, low data rate, lossy wireless links and low power. RPL is a proactive routing protocol that creates a Directed Acyclic Graph (DAG) of the network topology. RPL is increasingly used for Internet of Things (IoT) which comprises of heterogeneous networks and applications. RPL proposes a single path routing strategy. The forwarding technique of RPL does not support multiple paths between source and destination. Multipath routing is an important strategy used in both sensor and ad-hoc network for performance enhancement. Multipath routing is also used to achieve multi-fold objectives including higher reliability, increase in throughput, fault tolerance, congestion mitigation and hole avoidance. In this paper, M-RPL (Multi-path extension of RPL) is proposed, which aims to provide temporary multiple paths during congestion over a single routing path. Congestion is primarily detected using buffer size and packet delivery ratio at forwarding nodes. Congestion is mitigated by creating partially disjoint multiple paths and by avoiding forwarding of packets through the congested node. Detailed simulation analysis of M-RPL against RPL in both grid and random topologies shows that M-RPL successfully mitigates congestion and it enhances overall network throughput.
Catalytic activity evaluation of mesoporous a-GaOOH microspheres self-assembly
M. Muruganandham,Rominder Suri,Mika Sillanpaa,Bashir Ahmmad,Gang-Juan Lee,Jerry J. Wu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The mesoporous a-GaOOH was synthesized using oxalic acid in a hydrothermal process at various hydrothermal temperatures and times. The nitrogen adsorption analysis indicated that a-GaOOH with surface areas ranging from 6 to 87 m2/g and pore sizes from 3.8 to 7.2 nm can be prepared by adjusting the experimental conditions. The photocatalytic hexavalent chromium reduction was studied under UV light irradiation and the results showed that a-GaOOH having higher surface area owned higher photocatalytic activity. The degradation of 2-ethoxy ethyl acetate in catalytic ozonation process showed that the degradation was enhanced over ozonation process in the presence of mesoporous a-GaOOH
Bashir, Abida,Ikram, M,Kumar, Ravi,Thakur, P,Chae, K H,Choi, W K,Reddy, V R IOP Pub 2009 Journal of Physics, Condensed Matter Vol.21 No.32
<P>We present here the structural, electronic structure, magnetic and Mossbauer studies of NdFe1-xNixO3 (0 <= x <= 0.3) samples. All the samples exhibit a single-phase orthorhombic structure with space group Pbnm. The near-edge x-ray absorption fine structure (NEXAFS) studies reveal that, with the Ni substitution at Fe sites, a new spectral feature about 1.5 eV lower than the pre-edge structure of NdFeO3 in the O K edge is observed due to the 3d contraction effect and is growing monotonically with the increase of Ni concentration. The Fe L-3,L-2, Ni L-3,L-2 and Nd M-5,M-4 edges confirm the trivalent state of Fe, Ni and Nd ions. The Mossbauer spectra fitted with two Zeeman sextets confirm the different surroundings of Ni around Fe ions. With the increase in Ni concentration, the sextets are broadened. The increase of quadrupole splitting and the decrease of the hyperfine field suggest the change in the ordered regime of the system. The magnetic behaviour at low temperatures is explained in the context of competition among moments of rare earth (Nd) and transition metal ions (Fe/Ni). The strong paramagnetic contribution of the Nd magnetic sublattice and spin flip phenomenon is observed from the temperature dependence of zero-field-cooled and field-cooled magnetization where spin crossover is observed. The isothermal hysteresis loops show a decrease of magnetization and increase of coercivity with the increase in temperature and complements magnetization versus temperature. The results are explained on the basis of the spin reorientation phenomenon.</P>
Bashir, A.,Ikram, M.,Kumar, R.,Lisboa-Filho, P.N.,Thakur, P. Elsevier 2010 Materials science and engineering B. Advanced Func Vol.172 No.3
We present the structural, electronic structure and magnetic studies of Ni doped SmFeO<SUB>3</SUB>. The X-ray diffraction (XRD) studies confirm the single phase nature of the samples having orthorhombic Pbnm structure and the unit-cell volume is decreasing with the increase of Ni concentration. X-ray absorption spectroscopy (XAS) studies on O K, Fe L<SUB>3,2</SUB>, Ni L<SUB>3,2</SUB> and Sm M<SUB>5,4</SUB> edges of SmFe<SUB>1-x</SUB>Ni<SUB>x</SUB>O<SUB>3</SUB> (x@?0.5) samples along with the reference compounds revealed the homo-valence state of Fe and Ni in these materials. From magnetization studies it has been observed the materials exhibit ferromagnetic and antiferromagnetic sub-lattices, which are strongly dependent on the thermo-magnetic state of the system.
Low frequency stability study of a three-phase induction motor
M. Bashir Uddin,Md. Nuruzzaman Pramanik,Sheikh Abu Reza 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
A suitable volt/㎐ control strategy is proposed for stability improvement in low frequency operation of induction motors fed from variable voltage and variable frequency supply. The analysis is based on small scale perturbation method applied to the linearized model of state-space equations. Stability analyses are carried out through evaluation of eigen values of the linear model characteristic equation. Stability investigation shows that the simultaneous adjustment of stator voltage and frequency provides a convenient means for maintaining stability of induction motor. The results are verified by standard transient analysis method and demonstrate a very close agreement.
Lifetime Performance of Nili-ravi Buffaloes in Pakistan
Bashir, M.K.,Khan, M.S.,Bhatti, S.A.,Iqbal, A. Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.5
Data on 1,037 Nili-Ravi buffaloes from four institutional herds were used to study lifetime milk yield, herd life, productive life and breeding efficiency. A general linear model was used to study the environmental effects while an animal model having herd, year of birth and age at first calving (as covariate) along with random animal effect was used to estimate breeding values. The lifetime milk yield, herd life, productive life and breeding efficiency averaged $7,723{\pm}164$ kg, $3,990{\pm}41$ days, $1,061{\pm}19$ days and 64 percent, respectively. All the traits were significantly (p<0.01) affected by the year of birth and herd of calving, while the herd life was also affected (p<0.01) by the age at first calving. The heritabilities for lifetime milk yield, herd life, productive life and breeding efficiency were $0.093{\pm}0.056$, $0.001{\pm}0.055$, $0.144{\pm}0.079$ and 0.001, respectively. The definition for productive life, where each lactation gets credit upto 10 months had slightly better heritability and may be preferred over the definition where no limit is placed on lactation length. The genetic correlation between productive life and lifetime milk yield was low but high between productive life and herd life. The selection for productive life will increase herd life while lifetime milk yield will also improve. The overall phenotypic trend during the period under the study was negative for lifetime milk yield (-280 kg/year), herd life (-93 days), productive life (-42 days/year) and breeding efficiency (-0.36 percent/year), whereas the genetic trend was positive for lifetime milk yield (+15 kg/year) and productive life (+4 days/year).
Trigger Learning and ECG Parameter Customization for Remote Cardiac Clinical Care Information System
Bashir, M. E. A.,Dong Gyu Lee,Meijing Li,Jang-Whan Bae,Shon, H. S.,Myung Chan Cho,Keun Ho Ryu IEEE 2012 IEEE transactions on information technology in bio Vol.16 No.4
<P>Coronary heart disease is being identified as the largest single cause of death along the world. The aim of a cardiac clinical information system is to achieve the best possible diagnosis of cardiac arrhythmias by electronic data processing. Cardiac information system that is designed to offer remote monitoring of patient who needed continues follow up is demanding. However, intra- and interpatient electrocardiogram (ECG) morphological descriptors are varying through the time as well as the computational limits pose significant challenges for practical implementations. The former requires that the classification model be adjusted continuously, and the latter requires a reduction in the number and types of ECG features, and thus, the computational burden, necessary to classify different arrhythmias. We propose the use of adaptive learning to automatically train the classifier on up-to-date ECG data, and employ adaptive feature selection to define unique feature subsets pertinent to different types of arrhythmia. Experimental results show that this hybrid technique outperforms conventional approaches and is, therefore, a promising new intelligent diagnostic tool.</P>
Bent fluorescent solar concentrators (BFSCs): Spectroscopy, stability and outdoor performance
M.G. El-Shaarawy,S.M. El-Bashir,M. Hammam,M.K. El-Mansy 한국물리학회 2007 Current Applied Physics Vol.7 No.6
The spectroscopic properties of a coumarin derivative dye (macrolex uorescent red G) impregnated in a poly(methylmethacrylate)/silica hybrid matrix were studied. The stability of the hybrid against both light irradiation and raised temperature showed excellentweathering durability for use in uorescent solar concentrator (FSC) applications. A new geometry for FSCs was introduced, whichreceiving both direct and reected solar energy. The eect of the concentrator apex angle on solar energy conversion was studied. Theoptimum apex angle was found to correlate well to the location latitude.