International Islamic University, Chittagong

About: International Islamic University, Chittagong is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Debye model & Density functional theory. The organization has 1111 authors who have published 1089 publications receiving 7918 citations. The organization is also known as: IIUC.

Analysis of EEG and EMG signals for detection of Sleep Disordered Breathing events

Abstract: Sleep Disordered Breathing describes a group of disorders characterized by abnormalities of respiratory pattern or the quantity of ventilation during sleep Sleep Disordered Breathing causes disruptions in sleep, yielding waking somnolence, diminished neurocognitive performance, adverse cardiovascular outcomes, insulin resistance and other metabolic dysfunctions Electroencephalography and Electromyography signal analysis enables neurologists and sleep specialists to diagnose and monitor Sleep Disordered Breathing events This paper look into the prospect of identifying sleep disordered breathing events through the analysis of Electroencephalograph and Electromyography signals EEG and EMG signals corresponding to 25 subjects with previously diagnosed with Sleep Disorder Breathing studied and analyzed The detection of Sleep Disordered Breathing events were based on the study of power spectral analysis of EEG and EMG signals The variations in the normalized power of various spectral bands of EEG signals are studied along with the variations in power of the corresponding EMG signals This paper also discusses the probable causes of the aforementioned variations in the EEG and EMG signals

Chemical Profiles and Pharmacological Properties with in Silico Studies on Elatostema papillosum Wedd.

Abstract: The current study attempted, for the first time, to qualitatively and quantitatively determine the phytochemical components of Elatostema papillosum methanol extract and their biological activities. The present study represents an effort to correlate our previously reported biological activities with a computational study, including molecular docking, and ADME/T (absorption, distribution, metabolism, and excretion/toxicity) analyses, to identify the phytochemicals that are potentially responsible for the antioxidant, antidepressant, anxiolytic, analgesic, and anti-inflammatory activities of this plant. In the gas chromatography-mass spectroscopy analysis, a total of 24 compounds were identified, seven of which were documented as being bioactive based on their binding affinities. These seven were subjected to molecular docking studies that were correlated with the pharmacological outcomes. Additionally, the ADME/T properties of these compounds were evaluated to determine their drug-like properties and toxicity levels. The seven selected, isolated compounds displayed favorable binding affinities to potassium channels, human serotonin receptor, cyclooxygenase-1 (COX-1), COX-2, nuclear factor (NF)-κB, and human peroxiredoxin 5 receptor proteins. Phytol acetate, and terpene compounds identified in E. papillosum displayed strong predictive binding affinities towards the human serotonin receptor. Furthermore, 3-trifluoroacetoxypentadecane showed a significant binding affinity for the KcsA potassium channel. Eicosanal showed the highest predicted binding affinity towards the human peroxiredoxin 5 receptor. All of these findings support the observed in vivo antidepressant and anxiolytic effects and the in vitro antioxidant effects observed for this extract. The identified compounds from E. papillosum showed the lowest binding affinities towards COX-1, COX-2, and NF-κB receptors, which indicated the inconsequential impacts of this extract against the activities of these three proteins. Overall, E. papillosum appears to be bioactive and could represent a potential source for the development of alternative medicines; however, further analytical experiments remain necessary.

Perception of women entrepreneurs to accessing bank credit

Abstract: Women entrepreneurs play a substantial role in the sustainable economic development of various developed as well as developing countries in the world. In Bangladesh, the contribution of women entrepreneurs is still insignificant compared to other entrepreneurship due to a number of barriers to their financial inclusion. The current study tried to find out the problems faced with and the opinion of women entrepreneurs regarding the finance from commercial banks. The study used primary data from a sample survey, Key Informant Interview (KII) and in-depth interviews with the selected women entrepreneurs from Sylhet city of Bangladesh to meet the research objectives. Using Exploratory Factor Analysis (EFA), the study brings to life the fact that women entrepreneurs are reluctant to take the loan from banks because they have to face a number of problems there. Some of the major problems they faced are- collateral requirements, terms and conditions of bank loan, business characteristics and some other institution-specific problems to get access to bank finance. The findings of the study can aid the commercial banks in formulating their strategic decision about financing women entrepreneurs. In addition, this study indicates the way forward for the authoritative and supporting organizations of women entrepreneurs to formulate their action plans for the development of women entrepreneurship.

Mechanical, electronic, optical, thermodynamic properties and superconductivity of ScGa3

Abstract: The rare occurrence of type-I superconductivity in binary system ScGa 3 has experimentally been shown recently. In the present paper we study the electronic, optical, thermodynamic properties and some aspects of superconductivity of this compound using first-principles calculations. The mechanical properties like elastic constants, bulk modulus, shear modulus, Pugh's ductility index, Young's modulus, Poisson's ratio, elastic anisotropy factor, Peierls stress are calculated for the first time. The material is anisotropic and brittle. Electronic band structure, density of states, Fermi surfaces and bonding nature have also been studied. The optical functions are estimated and discussed for the first time. The high reflectivity is found in the ultraviolet regions up to ~13 eV and thus ScGa 3 can serve as a possible shielding material for ultraviolet radiation. Thermal effects on some macroscopic properties of ScGa 3 are predicted using the quasi-harmonic Debye model and phonon approximation in the temperature and hydrostatic pressure in the ranges of 0–1000 K and 0–40 GPa, respectively. The calculated electron–phonon coupling constant λ =0.52 yields T c =2.6 K, which is in very good agreement with the experimentally observed value. The value of the coupling constant and the Ginzburg–Landau parameter ( κ =0.09) indicate that the compound is a weak-coupled type-I rare binary BCS superconductor.