http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Mohammad N. Islam ),( Hoi N. Yang ),( Han S. Yang ),( Keum J. Park ) 한국농업기계학회 2010 한국농업기계학회 학술발표논문집 Vol.15 No.1
This research paper focuses on a design of a feasible and efficient technique for the reuse of industrial chemical wastewater. Combination techniques of the automatic restore filter (ARF) and reverse osmosis (RO) can be one of the possible solutions for treating industrial chemical wastewater. In this study, four types ( tin wastewater, Fine chemical industry wastewater, mixed chemical wastewater and Kumho chemical industry wastewater) of industrial chemical wastewater was evaluated using combined ARF and RO pilot plant, on the basis of COD, TN and TSS removal efficiency. Experiment was carried out using continuous flow operation system. Analyzing the all samples, we obtained the highest removal efficiency of COD, TN and TSS, 98.2%, 98.9% and 90.0%, respectively from tin wastewater. Also the removal efficiencies of Fine chemical industry wastewater, mixed chemical wastewater and Kumho chemical industry wastewater for COD, TN and TSS were 99.5%, 93.2%, 62.6%; 69.9%, 77.8%,95.0% and 99.8%, 86.9%, 99.0%, respectively. The results indicate that the combination of ARF and RO is a good technique for treating industrial chemical wastewater.
Rafiqul Islam,Shamima Choudhury,S. N. Rahman,Mohammad Jellur Rahman 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.3
The structural and electrical properties of pure and manganese doped barium titanate (BaTiO3) with a general formula BaMnxTi1-xO3 (where x=0.00, 0.01, 0.02, 0.03, and 0.04) were investigated. For the observation of the surface morphology and estimation of grain sizes scanning electron microscopy (SEM) was employed. The grain size of BaTiO3 increased with an increase of the Mn doping. The Curie temperature (Tc) which indicates the tetragonal-to-cubic transition, of each sample was found from the resistivity versus temperature curve, and Tc of BaTiO3 increased linearly with an increase of the Mn doping. The Tc of un-doped BaTiO3 was lower than that of the doped samples. The Tc value of pure BaTiO3 was found to be 120 oC. It was found that the dielectric constant versus temperature curve also shows a similar type of Tc. The dielectric constant of BaMnxTi1-xO3 was found to decrease with an increase of Mn doping and the Tc of BaTiO3 increases with the addition of Mn. The structural and electrical properties of pure and manganese doped barium titanate (BaTiO3) with a general formula BaMnxTi1-xO3 (where x=0.00, 0.01, 0.02, 0.03, and 0.04) were investigated. For the observation of the surface morphology and estimation of grain sizes scanning electron microscopy (SEM) was employed. The grain size of BaTiO3 increased with an increase of the Mn doping. The Curie temperature (Tc) which indicates the tetragonal-to-cubic transition, of each sample was found from the resistivity versus temperature curve, and Tc of BaTiO3 increased linearly with an increase of the Mn doping. The Tc of un-doped BaTiO3 was lower than that of the doped samples. The Tc value of pure BaTiO3 was found to be 120 oC. It was found that the dielectric constant versus temperature curve also shows a similar type of Tc. The dielectric constant of BaMnxTi1-xO3 was found to decrease with an increase of Mn doping and the Tc of BaTiO3 increases with the addition of Mn.
Fair Sharing of Backup Power Supply in Multi-Operator Wireless Cellular Towers
Nguyen, Minh N. H.,Tran, Nguyen H.,Islam, Mohammad A.,Pham, Chuan,Ren, Shaolei,Hong, Choong Seon INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS 2018 IEEE Transactions on Wireless Communications Vol. No.
<P>Keeping wireless base stations operating continually and providing uninterrupted communications services can save billions of dollars as well as human lives during natural disasters and/or electricity outages. Toward this end, wireless operators need to install backup power supplies whose capacity is sufficient to support their peak power demand, thus incurring a significant capital expense. Hence, pooling together backup power supplies and sharing it among co-located wireless operators can effectively reduce the capital expense, as the backup power capacity can be sized based on the aggregate demand of co-located operators instead of individual demand. Turning this vision into reality, however, faces a new challenge: how to fairly share the backup power supply? In this paper, we propose fair sharing of backup power supply by multiple wireless operators based on the Nash bargaining solution (NBS). In addition, we integrate our analysis with multiple time slots for emergency cases in which the study the backup energy sharing based on model predictive control and NBS subject to an energy capacity constraint regarding future service availability. Our simulations demonstrate that sharing backup power/energy improves the communications service quality with lower cost and consumes less base station power than the non-sharing approach.</P>
Conceptus-related measurements at early pregnancy in Black Bengal goat: an abattoir study
Anup K. Talukder,Mohammad A. Rahman,Mohammad N. Hoque,Mohammad T. Islam,Abu N. M. A. Rahman,Ziban C. Das 사단법인 한국동물생명공학회 2020 한국동물생명공학회지 Vol.35 No.2
The present study aimed to investigate the conceptus-related changes during early pregnancy in the Black Bengal breed of goat. A total of 22 gravid genitalia of the Black Bengal goats were collected from local slaughterhouses. The crown-rump lengths (CRL) of the conceptuses were determined to estimate the gestational age (GA). The length and diameter of uterine horn and amniotic sac were measured, and volume of amniotic and allantoic fluid formed by individual conceptus were recorded. The results reveal that the CRL is positively correlated with GA of the conceptus (R2 = 0.89, p < 0.05); however, CRL was not influenced by number of conceptus. Both the left and the right uterine horn gradually increased in size with the advancement of pregnancy irrespective of conceptus number present in the horn. The size of the amniotic sac of conceptus gradually increased with the conceptus age but maintained spherical shape from 5 to 7 weeks of pregnancy. The amniotic fluid formed by individual conceptus rapidly increased from 5 weeks (3.4 ± 0.3 mL) to 7 weeks (21.0 ± 2.0 mL) and 9 weeks (111.5 ± 4.0 mL). The volume of allantoic fluid formed by individual conceptus was steadily increased until 7 weeks (60.0 ± 5.0 mL) and began to decline slowly thereafter (50.0 ± 5.0 mL at 9 weeks). Notably, there was no effect of conceptus number per pregnancy on individual amniotic and allantoic fluid volume. The cotyledons have first appeared on the allanto-chorionic surface from 4 to 5 weeks of pregnancy. The closed eye, nostril and hooves of the conceptus became visible at 7 weeks of pregnancy. The present study has shown the basic information on conceptus-related developmental changes during early pregnancy up to 9 weeks in Black Bengal goat.
Conceptus-related measurements at early pregnancy in Black Bengal goat : an abattoir study
Anup K. Talukder,Mohammad A. Rahman,Mohammad N. Hoque,Mohammad T. Islam,Abu N. M. A. Rahman,Ziban C. Das 한국동물생명공학회(구 한국동물번식학회) 2020 Journal of Animal Reproduction and Biotechnology Vol.35 No.2
The present study aimed to investigate the conceptus-related changes during early pregnancy in the Black Bengal breed of goat. A total of 22 gravid genitalia of the Black Bengal goats were collected from local slaughterhouses. The crown-rump lengths (CRL) of the conceptuses were determined to estimate the gestational age (GA). The length and diameter of uterine horn and amniotic sac were measured, and volume of amniotic and allantoic fluid formed by individual conceptus were recorded. The results reveal that the CRL is positively correlated with GA of the conceptus (R2 = 0.89, p < 0.05); however, CRL was not influenced by number of conceptus. Both the left and the right uterine horn gradually increased in size with the advancement of pregnancy irrespective of conceptus number present in the horn. The size of the amniotic sac of conceptus gradually increased with the conceptus age but maintained spherical shape from 5 to 7 weeks of pregnancy. The amniotic fluid formed by individual conceptus rapidly increased from 5 weeks (3.4 ± 0.3 mL) to 7 weeks (21.0 ± 2.0 mL) and 9 weeks (111.5 ± 4.0 mL). The volume of allantoic fluid formed by individual conceptus was steadily increased until 7 weeks (60.0 ± 5.0 mL) and began to decline slowly thereafter (50.0 ± 5.0 mL at 9 weeks). Notably, there was no effect of conceptus number per pregnancy on individual amniotic and allantoic fluid volume. The cotyledons have first appeared on the allanto-chorionic surface from 4 to 5 weeks of pregnancy. The closed eye, nostril and hooves of the conceptus became visible at 7 weeks of pregnancy. The present study has shown the basic information on conceptus-related developmental changes during early pregnancy up to 9 weeks in Black Bengal goat.
Sumi Rifat J.,Das Ziban C.,Hoque Mohammad N.,Rahman Abu N. M. A.,Islam Mohammad T.,Talukder Anup K. 사단법인 한국동물생명공학회 2022 Journal of Animal Reproduction and Biotechnology Vol.37 No.4
The impact of heat stress (HS) on reproductive performance and its problems in cows remains to be investigated in Bangladesh. The study was, therefore, aimed to evaluate the effect of HS on fertility and reproductive health problems of dairy cows in a selected area of Bangladesh. A total of 1,095 cows from 500 farms were included in this study. The climate-related data were recorded daily basis for every month in a year and temperature-humidity index (THI) values were calculated to determine the level of HS. Concurrently, data on fertility parameters [number of services per conception (NSC), conception rate (CR) and calving to the first service interval (CFSI)], and reproductive problems were collected through a pre-defined questionnaire. The results show that crossbred [Native x Holstein-Friesian, (HF)] cows were more vulnerable (p < 0.05) to a magnitude of HS effects considering physiological parameters of cows [age, body condition score (BCS), parity and milk yield]. Regarding fertility, HS had no effect on NSC, CR and CFSI in both native and crossbred cows (p > 0.05). The findings on the reproductive problems indicate that HS had significant influence on the prevalence of anestrus (χ2 = 21.814, p < 0.05) and retained placenta (χ2 = 24.632, p < 0.05) in cows. Of note, the prevalence of repeat breeding syndrome was 2.5 folds higher in stress condition than in no stress condition. Abortion and dystocia were not influenced by HS. In conclusion, HS does not influence the fertility parameters of cows studied; however, anestrus and retained placenta are likely to occur under HS conditions in cows.