Papers by Md Shariful Islam
Strategic value of Online Social Networks (OSNs) in supply chain networks during COVID-19
Cogent Business & Management
Asian Journal of Empirical Research
The study examines the impact of information and communications technology (ICT) on bilateral exp... more The study examines the impact of information and communications technology (ICT) on bilateral export flows from Bangladesh to its trading partners based on an augmented panel gravity model. It includes 108 importers of Bangladeshi goods. The sample period extends from 2000 to 2018. Primarily, we employ Pooled Ordinary Least Square (POLS) model, and we utilize Poisson Pseudo Maximum Likelihood (PPML) as an alternative estimation technique to check robustness. The findings from the OLS model indicate that ICT has positive and significant effects on Bangladesh’s bilateral export. The results from PPML also support the findings from the OLS model. Therefore, the results come out to be robust. These findings imply that by reducing trade-related costs e. g., shipping costs, market access costs, and communication and information costs, ICT growth in Bangladesh as well as in its trading partner countries enhances trade flows and therefore has a trade-boosting effect.
Processes
Using biodiesel in diesel engines is beneficial for reducing emissions of carbon monoxide (CO), h... more Using biodiesel in diesel engines is beneficial for reducing emissions of carbon monoxide (CO), hydrocarbons (HC) and particulate matters (PM). Biodiesel is usually produced from vegetable oils or animal fats. When produced from plant oil or woody plant sources, biodiesel can reduce a significant amount of carbon dioxide on a life cycle basis. The objective of this study is to produce biodiesel from a non-conventional woody plant source that is, crude tall oil, which is a dark brown viscous liquid extracted and processed in wood pulping plants. It contains a high percentage of fatty acids. From raw crude tall oil, tall oil fatty acids were separated and were successfully used for the production of biodiesel in this study. Although biodiesel produces lower CO, HC and PM than petroleum diesel fuel, it produces higher oxides of nitrogen (NOx) emissions in diesel engines. Water emulsifications of diesel-biodiesel blends are investigated in a direct injection (DI) diesel engine in this w...
Bangladesh registered 1573828 confirmed cases of COVID-19 and the death toll crossed the grim mil... more Bangladesh registered 1573828 confirmed cases of COVID-19 and the death toll crossed the grim milestone of 27946 across the country as of 9th December, 2021. Despite the enforcement of stringent COVID-19 measures, including nationwide lockdowns, travel bans, tighter curbs on nonessential activities, and social distancing, the country witnessed an accelerated diffusion of coronavirus cases during the national events and festivals in 2020. The present study aims to examine the association between the national events / festivals and the transmission dynamics of COVID-19 by looking at the instantaneous reproduction number, Rt, of the 64 districts in Bangladesh. We further illustrate the COVID-19 diffusion explicitly in Dhaka Division at the first phase of the pandemic. The comprehensive analysis shows an escalation of Rt value in Dhaka and in all industrialized cities during the major events such as, Garments reopening and religious holidays in Bangladesh. Based on the analysis, a set o...
Background: COVID-19 vaccine hesitancy is one of the major concerns in the roll out of vaccines i... more Background: COVID-19 vaccine hesitancy is one of the major concerns in the roll out of vaccines in many countries. The aim of the study was to assess the level of COVID-19 vaccine acceptability among the population in Herat, Afghanistan, the third largest city in the country. Methods: This cross-sectional study was conducted between 15 April 2021 and 20 April 2021 among the general population of Herat City to examine the acceptability rate of COVID-19 vaccine. Sample size was calculated at 555. Different variables were collected using a questionnaire developed. Data were evaluated in IBM SPSS program. Results: Only 10.63% of the participants were willing to receive COVID-19 vaccine without having any concern and reservation. 45% were willing to receive the COVID-19 vaccine. 66.5% were concerned about the vaccine and its side effects and 29% were afraid of being infected by transmission of COVID-19 through the administration of vaccine on them. Conclusion: This research demonstrates that, concerns about the vaccine, myths and misinformation are widespread which will undermine the vaccination process. This study recommends the initiation of more health-related campaigns and awareness programs by the government for general population to enhance and expedite the roll out of COVID-19 vaccine.
Physical Review Applied, 2020
A laser diode subjected to optoelectronic feedback in which some light is converted to photocurre... more A laser diode subjected to optoelectronic feedback in which some light is converted to photocurrent that is fed back into the laser injection terminals can display periodic oscillations in its optical intensity. We demonstrate experimental and numerical evidence that, as the feedback level is varied, a stepwise change in the oscillation frequency manifests itself in the output optical intensity. These transitions in the dynamics can either correspond to an abrupt jump between two limit cycles, associated with a subcritical torus bifurcation of a limit cycle, or to a progressive switching mediated by an intermediate quasiperiodic state. Finally, when ramping the feedback level down, hysteresis is observed in the sequence of switching events between the limit cycles. Such devices are of interest for photonic microwave sources for wavelength-division multiplexed radio-over-fiber systems.
Journal of Community Health, 2021
This study aimed to determine the seroprevalence and determinants of hepatitis B virus (HBV) infe... more This study aimed to determine the seroprevalence and determinants of hepatitis B virus (HBV) infection among university students in Bangladesh. This cross-sectional study was conducted among 614 students from five universities in central Bangladesh. Data were collected on demographic information, immunization history, medical and blood transfusion history through the face-to-face interview. Blood samples were collected and screened for anti-HBsAg using ELISA, HBsAg Rapid Test-cassette, and immune chromatographic test. The overall seroprevalence of HBV infection was 5.0%, and vaccination coverage was 19.2% among the participants. Students having a history of surgery (OR 11.004, 95% CI 3.211-37.707), blood transfusion (OR 5.651, 95% CI 0.965-33.068), being married (OR 4.776,, and not being vaccinated (OR 9.825, 95% CI 1.130-85.367) were at higher risk of being infected by HBV. This study showed the endemicity of HBV infection among the Bangladeshi population. Marriage, surgical or blood transfusion history, not being vaccinated were the determinants of HBV infection within the study population. Public health initiatives for preventing HBV infection at the university levels should be envisaged.
2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia), 2017
Large number of electric vehicles (EV) at the same location can act as energy storage to provide ... more Large number of electric vehicles (EV) at the same location can act as energy storage to provide various vehicle-to- grid (V2G) services, such as participating in energy arbitrage and providing ancillary services to the grid. The bulk of the existing V2G capacity models is intended for home charging that mainly considers the parameters related to the arriving EV population only. However, a significant EV population is expected to be charged at business premises (e.g., office, university, hospital, shopping mall, etc.) during the daytime. Since the duration of stay is relatively low at business premises compared to home charging, the parameters associated with the departing EV popu lation and willingness to provide V2G service in addition to those related to arriving EV population could play a pivotal role in the V2G capacity. Therefore, this paper proposes a V2G capacity model by incorporating these aspects. The proposed model has been applied and tested on the University of Queensl...
IEEE Photonics Technology Letters, 2021
Optoelectronic feedback on a laser diode is demonstrated to generate two distinct modes of pulse-... more Optoelectronic feedback on a laser diode is demonstrated to generate two distinct modes of pulse-train formation depending on the injection current J of the laser. For J close to the threshold current J th , the pulse repetition rate is the inverse of the loop delay. This behavior is attributed to feedback-induced gain-switching. In contrast, for J J th , the repetition rate is observed to be related to the relaxation-oscillation frequency f RO . The potential to generate pulse trains and associated microwave combs may find use in metrology, optical communications, sampling, and spectroscopy.
Journal of Computer Science, 2020
In this study, an integrated eVALUE model is introduced to examine the relationship between organ... more In this study, an integrated eVALUE model is introduced to examine the relationship between organizational performance and electronic Human Resource Management (eHRM) practice. The model also explored the drivers of electronic Human Resource Management (eHRM) practice in the organizations. The primary data collected by using a pilot survey and closed-ended questionnaire designed on Likert 7-point scale. Simple random sampling was adopted to yield 674 acceptable responses from 165 organizations in Bangladesh. The structural equation modeling results indicate that only six drivers out of nine namely senior executives' attitude, IT skill of HRM professionals, perceived compatibility, senior leadership support, firm culture and competitive pressure are revealed a strong positive effect on eHRM practice. The study revealed a positive and significant relationship between eHRM practice and organizational performance. Moreover, the effect of job satisfaction of HRM professionals is observed to partially mediate on practiceperformance relationship. The practical implication of the outcome of study and the extent of further research are postulates at the conclusion.
Pharmaceuticals, 2020
Cuscuta reflexa Roxb. is traditionally used by the indigenous communities of Bangladesh to treat ... more Cuscuta reflexa Roxb. is traditionally used by the indigenous communities of Bangladesh to treat different diseases, such as pain, edema, tumor, jaundice, and skin infections. This study tested neuro-pharmacological, anti-nociceptive, and antidiarrheal activities by in vivo and in silico experiments for the metabolites extracted (methanol) from the leaves of Cuscuta reflexa (MECR). During the anxiolytic evaluation analyzed by elevated plus maze and hole board tests, MECR (200 and 400 mg/kg) exhibited a significant dose-dependent reduction of anxiety-like behavior in mice. Similarly, mice treated with MECR demonstrated a dose-dependent decrease in the time of immobility in both forced swimming and tail suspension tests. In addition, anti-nociceptive activity was assessed by the chemical-induced (acetic acid and formalin) pain models. In both cases, 400 mg/kg was found to be most effective and significantly (p < 0.001) inhibited acetic acid stimulated writhing and formalin-induced ...
Separations, 2020
Crude tall oil (CTO) is the third largest by-product at kraft pulp and paper mills. Due the large... more Crude tall oil (CTO) is the third largest by-product at kraft pulp and paper mills. Due the large presence of value-added fatty and resin acids, CTO has a huge valorization potential as a biobased, readily available, non-food, and low-cost biorefinery feedstock. The objective of this work was to present a method for the isolation of high-value linoleic acid (LA), an omega (ω)-6 essential fatty acid, from CTO using a combination of pretreatment, fractionation, and purification techniques. Following the distillation of CTO to separate the tall oil fatty acids (TOFAs) from CTO, LA was isolated and purified from TOFAs by urea complexation (UC) and low-temperature crystallization (LTC) in the temperature range between −7 and −15 °C. The crystallization yield of LA from CTO in that range was 7.8 w/w at 95.2% purity, with 3.8% w/w of ω-6 γ-linolenic acid (GLA) and 1.0% w/w of ω-3 α-linolenic (ALA) present as contaminants. This is the first report on the isolation of LA from CTO. The approa...
Current Trends in Civil & Structural Engineering, 2019
Cardiovascular Journal, 2019
Background: Early detection of patients with non-ST segment elevation myocardial infarction (NSTE... more Background: Early detection of patients with non-ST segment elevation myocardial infarction (NSTEMI) who would suffer from adverse in-hospital outcomes is important for the therapeutic decision. Recently it was described that CHA2DS2-VASc-HS and CHA2DS2-VASc score is a predictor for severity and adverse in-hospital outcomes in patients with stable coronary artery disease (CAD) and acute coronary syndrome. The aim of our study was to assess the accuracy of the CHA2DS2-VASc-HS score predicting adverse inhospital outcomes in NSTEMI patients. Methods: 120 patients with NSTEMI were enrolled in this study. The CHA2DS2-VASc-HS score was calculated. The study subjects were divided into two groups. Patients’ with CHA2DS2-VASc-HS score>4 were put into group I and scored” 4 into group II. They were treated as per hospital treatment protocol and followed-up for adverse in-hospital outcomes (Heart failure, cardiogenic shock, recurrent ischemic pain, significant arrhythmia and death). Results:...
Veterinary world, 2018
Asian house shrew (), a widely distributed small mammal in the South Asian region, can carry helm... more Asian house shrew (), a widely distributed small mammal in the South Asian region, can carry helminths of zoonotic importance. The aim of the study was to know the prevalence and diversity of gastrointestinal (GI) helminths in free-ranging Asian house shrew () in Bangladesh. A total of 86 Asian house shrews were captured from forest areas and other habitats of Bangladesh in 2015. Gross examination of the whole GI tract was performed for gross helminth detection, and coproscopy was done for identification of specific eggs or larvae. The overall prevalence of GI helminth was 77.9% (67/86), with six species including nematodes (3), cestodes (2), and trematodes (1). Of the detected helminths, the dominant parasitic group was from the genus spp.(59%), followed by spp.(17%), spp. (10%), spp. (3%), and spp.(3%). The finding shows that the presence of potential zoonotic parasites spp. and spp.) in Asian house shrew is ubiquitous in all types of habitat (forest land, cropland and dwelling) i...
Journal of Science, Technology and Environment Informatics, 2014
Morphological study of thymus stromal cells (TEL‐2 cell) which play a role in the elimination of double positive immature thymocytes by phagocytosis
The Anatomical Record, 1996
IBM Journal of Research and Development, 2015
The IBM POWER8i processor is a 649-mm 2 , 4.2-billion transistor, high-frequency microprocessor f... more The IBM POWER8i processor is a 649-mm 2 , 4.2-billion transistor, high-frequency microprocessor fabricated in the IBM 22-nm silicon on insulator (SOI) technology with embedded dynamic random access memory (eDRAM) and 15 layers of metal. With its twelve architecturally enhanced, eight-way multithreaded cores, 96-MB high-bandwidth shared third-level cache, and increased on and off-chip bandwidth, the POWER8 processor delivers industry-leading performance. This paper describes the circuit techniques and design methodologies that were employed for implementing this chip and that allowed it to maintain the power dissipation at the level of its predecessor while delivering a threefold increase in per-socket performance. Among the innovative technologies employed by the processor are resonant clocking, on-chip per-core voltage regulation, and enhanced eDRAM arrays.
Journal of the Bangladesh Agricultural University, 1970
The efficient government finance will increase economic growth and thereby income distribution. T... more The efficient government finance will increase economic growth and thereby income distribution. This research has been formulated an efficiency theory of production and finance. This research compared the government expenditure patterns into two situations. One, when a government borrows and accordingly allocates resources for productive expenditures for private and public finance. Another situation is that when a government borrows and fixed the resources for productive expenditure for only public finance. A comparative efficiency theory of production and finance are being formulated to test the general equilibrium of production of goods and services. This general equilibrium theory of efficient production of a firm has been made a conclusion that government resource allocation in both for private and public finance is efficient and never creates economic distortion even if these resources are borrowed form domestic sources. These domestic sources might be private commercials banks...
Lecture Notes in Computer Science
Embedded systems increasingly encompass both dependability and responsiveness requirements. While... more Embedded systems increasingly encompass both dependability and responsiveness requirements. While sophisticated techniques exist, on a discrete basis, for both dependability/fault-tolerance (FT) and real-time (RT), the composite considerations for FT+RT are still evolving. Obviously the different objectives needed for FT and RT make composite optimization hard. In this paper, the proposed Multi Variable Optimization (MVO) process develops integrated FT+RT considerations. We introduce dependability as an initial optimization criteria by confining error propagation probability, i.e., limiting the interactions. Subsequently, quantification of interactions together with RT optimization by minimizing scheduling length is developed. A simulated annealing approach is utilized to find optimized solutions. We provide experimental results for our approach, showing significant design improvements over contemporary analytical initial feasibility solutions.
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Papers by Md Shariful Islam