http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Improvement in DRX Power Saving for Non-real-time Traffic in LTE
Mohammad Tawhid Kawser,Mohammad Rakibul Islam,Khondoker Ziaul Islam,Mohammad Atiqul Islam,Mohammad Mehadi Hassan,Zobayer Ahmed,Rafid Hasan 한국전자통신연구원 2016 ETRI Journal Vol.38 No.4
A discontinuous reception (DRX) operation is included in the Long Term Evolution (LTE) system to achieve power saving and prolonged battery life of the user equipment. An improvement in DRX power saving usually leads to a potential increase in the packet delay. An optimum DRX configuration depends on the current traffic, which is not easy to estimate accurately, particularly for non-real-time applications. In this paper, we propose a novel way to vary the DRX cycle length, avoiding a continuous estimation of the data traffic when only non-real-time applications are running with no active real-time applications. Because a small delay in non-real-time traffic does not essentially impact the user’s experience adversely, we deliberately allow a limited amount of delay in our proposal to attain a significant improvement in power saving. Our proposal also improves the delay in service resumption after a long period of inactivity. We use a stochastic analysis assuming an M/G/1 queue to validate this improvement.
Expression Patterns of an Abiotic Stress-inducible Dehydrin Gene, LeDhnT14, in Tomato
Mohammad Saiful Islam,Myeong-Hyeon Wang 한국원예학회 2010 Horticulture, Environment, and Biotechnology Vol.51 No.6
A full length cDNA encoding Lycopersicum esculentum dehydrin Tas14 (designated as LeDhnT14) was isolated and investigated for the expression pattern of dehydrin Tas14 gene in tomato plant under different abiotic stresses. Phylogenetic analysis based on the deduced amino acid sequence of the dehydrin Tas14 gene (LeDhnT14) cDNA from tomato revealed a high sequence similarity to other dehydrin genes. Southern blot showed that LeDhnT14 is a multiple copy gene in the tomato genome. The organ specific expression profiling indicated that LeDhnT14 was expressed in mature leaves, stem, and flowers, but with no detectable expression in root. Northern blot analysis revealed that various environmental stresses such as salt, drought, coldness, MV, ABA, and H2O2 induced significant expression of LeDhnT14. These results indicated that the LeDhnT14 plays an important role in tomato responses to abiotic stresses and may be useful in improving of plant tolerance to abiotic stresses.
Islam, Mohammad Saiful,Newaz, Muhammad Ali,Islam, Md. Jahidul,Heo, Seong-Il,Wang, Myeong-Hyeon The Plant Resources Society of Korea 2007 한국자원식물학회지 Vol.20 No.6
GE interaction is the expression of differential genotypic adaptation across environments. GE interactions through different stability parameters and performance of the traits of genotypes were studied. The traits were days to maturity, pod length, number of pods/ plant, 100-seed weight and seed yield/plant in ten soybean genotypes across five environments. Significant differences were observed for genotypes, environments and GE interactions. Stability analysis after Eberhart and Russell's model suggested that the genotypes used in this study were all more or less responsive to environmental changes. Most of the genotypes perform better in Env.3. Based on phenotypic indices(Pi), regression ($S^2di$) genotype Garurab was found fairly stable for days to maturity. BS-23 and G-2120 may be considered as stable genotype for pod length. All the genotypes except G-2120 showed that the genotypes were relatively unstable under environmental fluctuation for the number of pod/plant. Genotype BS-23 was found most stable among all the genotypes for 100-seed weight. BS-3 and Gaurab was the most stable and desirable genotypes for seed yield in soybean.
Manufacture and Characterization of hemp-Acrodur Biocomposites: Variation of Process Parameters
Mohammad S Islam,Menghe Miao 한국섬유공학회 2022 Fibers and polymers Vol.23 No.8
In this study, hemp fibre reinforced Acrodur resin biocomposites were manufactured using nonwoven hemp fibremats by varying a range of processing parameters such as Acrodur solution to dispersion ratio, relative humidity, curing time,and temperature. Dry fibre mats using Acrodur solution to dispersion ratio of 3:1 at a temperature of 160 oC and processingtime of 20 minutes were found to be optimum condition for the manufacture of the biocomposites. These optimumparameters gave the best combination of specific tensile strength (26.4 MPa-cm3/g) and specific Young’s modulus (4.4 GPacm3/g) with a density of 0.94 g/cm3. Thermogravimetric analysis (TGA) of the optimised biocomposites showedsimilarthermal stability when compared with pristine fibres. Contact angle measurements of the optimised biocomposites showedincreased hydrophobicity of the biocomposites than those of the pristine fibres. From the water immersion test, the path ofwicking of water molecules into the biocomposites was believed to be rather straight than tortuous and A 4-week waterimmersion test of the optimised biocomposites conceded about 43.5 % loss of tensile strength and 57.1 % loss of Young’smodulus which was believed to be due to wicking of the water molecules into the fibre of the biocomposites in a straight pathrather than a tortuous path.
Mohammad Jahidul Islam,장창원,음재성,정성민,신명선,이윤경,최영순,김범철 한국생태학회 2019 Journal of Ecology and Environment Vol.43 No.1
Background: Stoichiometry plays an important role in understanding nutrient composition and cycling processes in aquatic ecosystems. Previous studies have considered C:N:P ratios constant for both DOM (dissolved organic matter) and POM (particulate organic matter). In this study, water samples were collected in the six major rivers in Korea and were incubated for 20 days. C:N:P ratios were determined during the time course of the incubations. This allowed us to examine the changes in N and P contents of organic matter during decomposition. Results: POM and DOM showed significant differences in N and P content and the elemental ratios changed during the course of decomposition; DOM showed higher C:N and C:P ratios than POM, and the C:N and C:P ratios increased during decomposition, indicating the preferential mineralization of P over N and N over C. Conclusions: The N and P contents of organic matter in aquatic ecosystem are far from constant and vary significantly during decomposition. More detailed information on the changes in C:N:P ratios will provide improved understanding of decomposition processes and improved modeling of aquatic ecosystems.
Self-assembly of a liquid crystal ABA triblock copolymer in a nematic liquid crystal solvent
Islam, Mohammad Tariqul,Kamal, Tahseen,Shin, Taegyu,Seong, Baekseok,Park, Soo-Young Elsevier 2014 Polymer Vol.55 No.16
<P><B>Abstract</B></P> <P>An ABA type triblock copolymer, consisting of liquid crystalline polymer (LCP, poly(4-cyanobiphenyl-4-oxyundecylacrylate)) ‘A’ end blocks and a deuterated polystyrene (dPS) ‘B’ mid block (LCP–dPS–LCP) was successfully synthesized by atom transfer radical polymerization (ATRP). The number average molecular weight (<I>M</I> <SUB>n</SUB>) of LCP–dPS–LCP was LCP (7.1 K)–dPS (19.4 K)–LCP (7.1 K) with a polydispersity index (PDI) of 1.41. LCP–dPS–LCP was self-assembled in a nematic liquid crystal solvent of 4-pentyl-4′-cyanobiphenyl (5CB) into spherical micelles with a LCP corona and a dPS core, in which dPS was folded to produce a V-shape structure. Micellar structures of LCP–dPS–LCP in 5CB were examined by small angle neutron scattering at various block copolymer concentrations and temperatures using a curve fitting method. The critical micelle concentration was 0.25 wt% and the self-assembled micelles dissociated into unimers at 33 °C, which is lower than the nematic to isotropic transition temperature (<I>T</I> <SUB>ni</SUB>) of 5CB (36 °C). The entropic penalty imposed on dPS by the ordered nematic state of the 5CB solvent caused phase separation of the flexible dPS block to form micelles, which vanished above the <I>T</I> <SUB>ni</SUB> of the 5CB solvent. Magnetic field-induced global orientation of 5CB revealed the structure of the dPS core of the micelle to be prolate (an elongated sphere) oriented with its long axis along the direction of the applied magnetic field.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
ISLAM, K.M. Anwarul,SADEKIN, Mohammad Shamsus,RAHMAN, Md. Tahidur,CHOWDHURY, Md. Ariful Haque Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3
Although corporate social responsibility (CSR) is an extensively studied topic, its determinants in the field of Islamic banking are scarce. In Bangladesh, CSR plays a vital role in gaining customer loyalty and confidence. Therefore, this research aims to identify and analyze the influence of the Shariah Supervisory Board (SSB) and the Shariah Audit Committee (SAC) on CSR adoption in Islamic banks in Bangladesh. The study population is managers and second managers of 160 Islamic bank branches of different commercial banks in Dhaka, Bangladesh. The sampling technique used is convenience sampling where the first available primary data source was used for the research without additional requirements. The study developed a survey questionnaire from examining previous related studies in Islamic banking and CSR context. The final sample size in this research was n = 309, indicating the survey response rate was about 97%. The study used SPSS 23.0 software to interpret the statistical findings, and the findings revealed that support from the SSB and the presence of a strong and effective SAC has a strong correlation with CSR adoption and significantly influence CSR adoption in Islamic banks in Bangladesh. Finally, the study proposes several significant and crucial policy guidelines for Islamic bank branches to adopt CSR activities.