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Milestones of Wireless Communication Networks and Technology Prospect of Next Generation(6G)

Computers, Materials & Continua 2022年第6期71卷 4803-4818页

作者： Mohammed H.Alsharif md.Sanwar Hossain abu Jahid Muhammad Asghar Khan Bong Jun Choi Samih M.Mostafa Department of Electrical Engineering College of Electronics and Information EngineeringSejong University209 Neungdong-roGwangjin-guSeoul05006Korea Department of Electrical and Electronic Engineering Bangladesh University of Business and TechnologyDhaka1216Bangladesh Department of Electrical&Computer Engineering University of OttawaOttawaON K1N 6N5Canada Department of Electrical Engineering Hamdard University KarachiIslamabad CampusIslamabad44000Pakistan School of Computer Science and Engineering&School of Electronic Engineering Soongsil UniversitySeoulKorea Faculty of Computers and Information South Valley UniversityQena83523Egypt Academy of Scientific Research and Technology Cairo11516Egypt

Since around 1980,a new generation of wireless technology has arisen approximately every 10 ***-generation(1G)and secondgeneration(2G)began with voice and eventually introduced more and more data in third-generation(3G)and became highly popular in the fourthgeneration(4G).To increase the data rate along with low latency and mass connectivity the fifth-generation(5G)networks are being installed from ***,the 5G technology will not be able to fulfill the data demand at the end of this ***,it is expected that 6G communication networks will rise,providing better services through the implementation of new enabling technologies and allowing users to connect everywhere.6G technology would not be confined to cellular communications networks,but would also comply with non-terrestrial communication system requirements,such as satellite *** ultimate objectives of this work are to address the major challenges of the evolution of cellular communication networks and to discourse the recent growth of the industry based on the key scopes of application and *** main areas of research topics are summarized into(i)major 6G wireless networkmilestones;(ii)key performance indicators;(iii)future new applications;and(iv)potential fields of research,challenges,and open issues.

关键词： Wireless networks beyond 5G 6G communications terahertz frequency terahertz communications holographic calls

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Management of Sepsis in Intensive Care Units in Rajshahi Medical College, Bangladesh

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Advances in Infectious Diseases 2020年第1期10卷 11-25页

作者： abu Hena Mostafa Kamal Pranab Karmaker Wahida Khatun Arup Kumar Saha md. Latifur Rahman Parvez Hassan ICU Rajshahi Medical College Hospital Rajshahi Bangladesh Institute of Biological Sciences University of Rajshahi Rajshahi Bangladesh City Dental College Dhaka Bangladesh Islami Bank Medical College and Hospital Rajshahi Bangladesh

Background: Sepsis was a life-threatening situation affecting roughly 27 million individuals globally every year. Devoid of proper management, sepsis could develop to austere sepsis and septic shock that reason certain eight million expiries every year. Initial identification and analysis of contaminations and quick introductions of antimicrobial management had long been predictable as essential principles of treatment. Methods: All patients were evaluated thoroughly by history, clinical and laboratory findings. Serum lactate levels were collected at 0 hr and 24 hrs of the total admission in the ICU. Blood culture and sensitivity was performed prior to antibiotic administration in this study. Results: In this research, total sample was 1367 patients. Among these sepsis patients were 305 (nearly 22%). These 305 studied sepsis cases, majority 128 (42%) of the patients were within the age group of 41 - 65 years, followed by 18 - 30 years consisting of 116 (38%) and the least number of sepsis patients were in the age group of >65 years (20%). This study found that 129 (42.3%) out of 305 blood samples screened from assumed sepsis infection were affirmative for the presence of sepsis causing pathogens. Among the 129 culture positive samples, majority of the isolated micro-organisms were gram negative bacteria 58% (75), followed by gram positive bacteria 38% (49), and 3.8% (5) were the fungi Candida albicans. Conclusion: At present, mortality & morbidity of sepsis subject was too big due to late identification, wrong & inadequate management of sepsis in the ward and also in the intensive care unit of Bangladesh.

关键词： Sepsis ICU SIRS Empirical Antibiotic

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Hydro-geochemical evaluation of groundwater with studies on water quality index and suitability for drinking in Sagardari,Jashore

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Journal of Groundwater Science and Engineering 2020年第3期8卷 259-273页

作者： Mohammad Tofayal Ahmed Minhaj Uddin Monir md.Yeasir Hasan md.Mominur Rahman md.Shamiul Islam Rifat md.Naim Islam abu Shamim Khan md.Mizanur Rahman md.Shajidul Islam Department of Petroleum and Mining Engineering Jashore University of Science and TechnologyJashore-7408Bangladesh Environmental Laboratory Asia Arsenic NetworkArsenic CenterBenapole RoadKrishnobatiPulerhatJashore-7400Bangladesh

Sagardari union is facing groundwater crisis because of contaminations from agriculture and urban sewage,which bring a considerable change in water *** view of this,hydro-chemical analyses were undertaken on 35 groundwater samples and the following hydro-geochemical parameters,pH,total dissolved solids(TDS),total hardness(TH),electrical conductivity(EC),cations and anions,were *** the analytical results,it is found that pH value was lower than WHO drinking water standard and the middledownstream portions of the investigation region show higher *** piper plot indicates that the groundwater in Sagardari falls in the categories of NaClHCO3 hydro-chemical *** TH in groundwater was detected,but still in an acceptable *** addition,salinity and arsenic ratio are higher and moderately higher,*** spatial distribution of Groundwater Quality Index(GWQI)was determined by geo-statistical modelling of Sagardari *** study provides information and supports the administration which to make better groundwater utilization and quality control in the Sagardari union.

关键词： Sagardari union Groundwater Hydro-geochemistry Spatial distribution Water quality index

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A Prospective Study on the Efficiency of Ciprofloxacin in Combination with Chloramphenicol against Multiple Antibiotics Resistant <i>Klebsiella pneumonia</i>

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Advances in Microbiology 2020年第9期10卷 411-421页

作者： Akash Ahmed Ishrat Binte Aftab Tonima Fairooz Mouly Sinthia Kabir Mumu abu Syed md. Mosaddek Mahboob Hossain Microbiology Program Department of Mathematics and Natural Sciences BRAC University Dhaka Bangladesh Department of Pharmacology Uttara Adhunik Medical College Dhaka Bangladesh

Pneumonia is the single largest infectious cause of death in children worldwide and also a form of an acute respiratory infection that affects the lung. The purpose of the study was to develop a new approach to treat antibiotic-resistant K. pneumoniae infection. This study aimed in quest of a drug to combine with ciprofloxacin, a broad spectrum antibiotic frequently used to treat lung infections. Methodology: A total of 23 lung infection bacterial samples were collected and studied against 14 antibiotics of different classes. The disk diffusion method was performed to determine synergy screening, MIC value, and qualitative toxicity analysis of ciprofloxacin and chloramphenicol combination. Results: After primary screening of antibiotic susceptibility, they were categorized into multidrug-resistant (md.), extensively drug-resistant (XDR) and pan drug-resistant (PDR) pathogens where 9 isolates were md., 5 were XDR and 3 isolates were PDR. Furthermore, they were trialed in combination ciprofloxacin along with other 7 drugs in disk diffusion to explore the synergistic effect. The combination of ciprofloxacin and moxifloxacin, ciprofloxacin and chloramphenicol were found to be synergic. Then the MIC test was done for the combination ciprofloxacin and chloramphenicol. When the MIC result was generated, the MIC of the respective combination was analyzed. Furthermore, the fractional inhibitory concentration (FIC) was calculated and in accordance with the results of the FIC index, ciprofloxacin-chloramphenicol combination has shown value 0.4510 which revealed a synergistic effect against multi-drug resistant Klebsiella pneumoniae. Conclusion: Given these points, if the efficiency of this antibiotic can be accelerated from combination with other drugs, it might be lifesaving and cost effective as well.

关键词： Multidrug Resistant Bacteria Klebsiella pneumonia Combination Therapy FIC

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太阳能集热器强化传热技术的局限性与挑战

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Journal of Central South University 2023年第11期30卷 3538-3574页

作者： Lukman Ahmed OMEIZA Muhammad ABID Yathavan SUBRAMANIAN Anitha DHANASEKARAN md.osfiqur RAHMAN Saifullah abu bakar Kateryna KOZAK Ukashat MAMUDU abul Kalam AZAD Faculty of Integrated Technologies Universiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam Department of Electrical Engineering Ternopil Ivan Puluj National Technical University56Ruska Street46001 TernopilUkraine Centre for Advance Material and Energy Science Universiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam

目前,太阳能集热器在可再生能源领域发挥着至关重要的作用,这在核心能源专家和研究界得到了广泛的认可。由于这种太阳能收集技术的高能量转换率,迫切需要评价方法,以期改善传热过程。前期研究人员主要致力于工作流体的增强上,而忽略了... 详细信息

目前,太阳能集热器在可再生能源领域发挥着至关重要的作用,这在核心能源专家和研究界得到了广泛的认可。由于这种太阳能收集技术的高能量转换率,迫切需要评价方法,以期改善传热过程。前期研究人员主要致力于工作流体的增强上,而忽略了其他同样有助于增强太阳能集热器传热过程的技术,这使得其他方向的研究逐渐过时了。本研究的主要目的是提供最新的进展和方法,以加强太阳能集热器的传热过程的最新概述。研究了传统技术和创新技术,探讨了它们在提高热性能和整体系统效率方面的有效性。对太阳能集热器强化传热技术的最新研究进行了全面的文献综述。确定了主要挑战、知识差距和局限性,并推荐了潜在的未来研究方案。这篇全面的综述将作为研究人员和主要能源参与者的指南,为太阳能集热器领域提供参考的研究方向。

关键词：太阳能集热器增强技术热效率纳米流体蓄热器

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Element Composition of the Atmospheric Depositions in Bangladesh

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Journal of Environmental Protection 2018年第9期9卷 948-956页

作者： Jatish Chandra Biswas md.Mozammel Haque Mahmuda Akter A. T. M. Sakhawat Hossain Faruk Hossain Khan md.Zakaria Ibne Baki abu bakar Siddique Sarker md.Rafiqul Islam Bangladesh Rice Research Institute Gazipur Bangladesh

Compositions of dry and wet atmospheric depositions vary depending on geographic locations and industrialization. Fog waters were collected from different regions of Bangladesh along with rain, sub-surface irrigation water and dust particles from Gazipur and compositions were analyzed. The compositions of fog water varied greatly among locations. The ammonium nitrogen (NH+4-N) content was the highest (36 - 37 ppm) in Gazipur district and the lowest in Sylhet district (3.2 - 3.6 ppm). Phosphorus (5.2 - 5.5 mg/L), K (29.5 - 30 mg/L), S (11.0 - 11.5 mg/L), Zn (2.9 - 3.3 mg/L), Na (11.7 - 12.5 mg/L), Ca (22.0 - 23.3 mg/L) and Cd (0.14 - 0.17 mg/L) contents were also higher in Gazipur district. Dust particles, rain and sub-surface irrigation water of Gazipur district contained considerable amounts of macro and micro elements. We conclude that dry and wet atmospheric depositions varied depending on locations and industrial development. Such study needs to be correlated with ecological consequences and soil fertility management.

关键词： Water Dust Chemical Composition Regions

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Studies on the anti-diarrheal properties of leaf extract of Desmodium puchellum

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Asian Pacific Journal of Tropical Biomedicine 2013年第8期3卷 639-643页

作者： md.Khalilur Rahman Soumitra Barua md.Fokhrul Islam md.Rafikul Islam Mohammed abu Sayeed Mst.Shahnaj Parvin md.EkramulIslam Department of Pharmacy International Islamic University ChittagongBangladesh Department of Pharmacy University of RajshahiBangldesh

Objective:To evaluate the pharmacological activity against diarrhea of methanol and petroleum ether extract ofDesmodium puchellum(Family:Fabaceae)***:The extract was evaluated for castor oil-induced diarrhea and enteropooling as well as intestinal motility in *** of the extracts were given to the rats at 200 mg/kg *** was used as a standard drug for ***:The diarrheal severity was reduced significantly(P<0.05)by methanol and petroleum ether extracts by 31.95% and 28.33%,respectively,whereas 54.75% inhibition was found for standard drug loperamide at 5 mg/*** two extracts also significantly(P<0.05) reduced the intestinal volume in case of castor oil induced ***:It is concluded that both fractions contain some biologically active ingredients that are active for anti-diarrheal actions whereas methanol fraction has better potential.

关键词： Antidiarrhea Thrombolysis Desmodium puchellum Loperamide

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Role of H2 receptor blocker famotidine over the clinical recovery of COVID-19 patients: A randomized controlled trial

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World Journal of Clinical Cases 2022年第23期10卷 8170-8185页

作者： abu Taiub Mohammed Mohiuddin Chowdhury Aktar Kamal md.Kafil Uddin Abbas md.Rezaul Karim md.Ahsan Ali Shubhashis Talukder H M Hamidullah Mehedi Hamid Hassan abul Hossain Shahin Yarui Li Shuixiang He Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Ministry of Health and Family Welfare(OSDDGHS) Dhaka 1212Bangladesh Critical Care Unit M Abdur Rahim Medical College HospitalDinajpur 5200Bangladesh Critical Care Unit Cox's Bazar 250 Bed District Sadar HospitalCox's Bazar 4700Bangladesh Department of Neurology University Hospital LimerickLimerick V94 T9PXIreland Department of Histology Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Intensive Care Unit 250 Bed Chattogram General HospitalChittagong 4000Bangladesh Department of Medicine 250 Bed Chattogram General HospitalChittagong 4000Bangladesh Department of Emergency Chattogram Medical College HospitalChittagong 4000Bangladesh Department of Cardiology 250 Bed Chattogram General HospitalChittagong 4000Bangladesh

BACKGROUND Coronavirus disease 2019(COVID-19)is a global pandemic putting the population at a high risk of infection-related health hazards,mortality and a potential failure of proper medical ***,it is necessary to evaluate the potential use of the existing drugs that could be used as options for the medical management of COVID-19 *** To evaluate the role of the H_(2) receptor blocker“famotidine”in COVID-19 *** This study was done on seriously ill COVID-19 patients admitted to the intensive care unit(ICU)from different institutes in *** were divided into famotidine treatment group“A”(famotidine 40 mg to 60 mg oral formulation every 8 h with other treatment as given),and control group“B”(treatment as given).National early warning score(NEWS)-2,and sequential organ failure assessment day-1 score was calculated to evaluate the *** were evaluated by the time required for clinical improvement,characterized as duration required from enrollment to the achievement of NEWS-2 of≤2 maintained for 24 h;time to symptomatic recovery,defined as the duration in days(from randomization)required for the recovery of the COVID-19 symptoms;mortality rate;duration of ICU and hospital stay;total period of hospitalization;the rate of supplementary oxygen requirement;the computed tomography(CT)chest recovery(%),the time required for the viral clearance and“NEWS-2”on *** A total of 208 patients were enrolled in this study with 104 patients in each *** famotidine treatment group had comparatively better recovery of 75%and a low mortality of 25%than the control with a recovery of 70%and a mortality of 30%.Duration of clinical improvement(group A 9.53 d,group B 14.21 d);hospitalization period among the recovered patients(group A 13.04 d,group B 16.31 d),pulmonary improvement in chest CT(group A 21.7%,group B 13.2%),and the time for viral clearance(group A 20.7 d,group B 23.8 d)were found to be statistically si

关键词： COVID-19 SARS-CoV-2 Famotidine COVID-19 acute respiratory distress syndrome COVID-19 treatment Bangladesh

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Flood susceptibility modelling using advanced ensemble machine learning models

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Geoscience Frontiers 2021年第3期12卷 60-77页

作者： abu Reza md.Towfiqul Islam Swapan Talukdar Susanta Mahato Sonali Kundu Kutub Uddin Eibek Quoc Bao Pham Alban Kuriqi Nguyen Thi Thuy Linh Department of Disaster Management Begum Rokeya UniversityRangpurBangladesh Department of Geography University of Gour BangaMaldaWest BengalIndia Environmental Quality Atmospheric Science and Climate Change Research GroupTon Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Environment and Labour Safety Ton Duc Thang UniversityHo Chi Minh CityVietnam CERIS Instituto Superior TécnicoUniversidade de LisboaLisbonPortugal Institute of Research and Development Duy Tan UniversityDanang 550000Vietnam Faculty of Environmental and Chemical Engineering Duy Tan UniversityDanang 550000Vietnam

Floods are one of nature's most destructive disasters because of the immense damage to land,buildings,and human *** is difficult to forecast the areas that are vulnerable to flash flooding due to the dynamic and complex nature of the flash ***,earlier identification of flash flood susceptible sites can be performed using advanced machine learning models for managing flood *** this study,we applied and assessed two new hybrid ensemble models,namely Dagging and Random Subspace(RS)coupled with Artificial Neural Network(ANN),Random Forest(RF),and Support Vector Machine(SVM)which are the other three state-of-the-art machine learning models for modelling flood susceptibility maps at the Teesta River basin,the northern region of *** application of these models includes twelve flood influencing factors with 413 current and former flooding points,which were transferred in a GIS *** information gain ratio,the multicollinearity diagnostics tests were employed to determine the association between the occurrences and flood influential *** the validation and the comparison of these models,for the ability to predict the statistical appraisal measures such as Freidman,Wilcoxon signed-rank,and t-paired tests and Receiver Operating Characteristic Curve(ROC)were *** value of the Area Under the Curve(AUC)of ROC was above 0.80 for all *** flood susceptibility modelling,the Dagging model performs superior,followed by RF,the ANN,the SVM,and the RS,then the several benchmark *** approach and solution-oriented outcomes outlined in this paper will assist state and local authorities as well as policy makers in reducing flood-related threats and will also assist in the implementation of effective mitigation strategies to mitigate future damage.

关键词： Flood hazard Flood vulnerability Flash floods Debris flow Teesta River basin Bangladesh

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Non-Diabetic Renal Disease in Patients with Type 2 Diabetes Mellitus with Proteinuria

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Journal of Biosciences and Medicines 2019年第12期7卷 68-78页

作者： Manik Chandra Mondal Rana Mokarrom Hossain K. B. M. Hadiuzzaman md. Omar Faroque Shah md. Zakir Hossain A. K. M. Shahidur Rahman Fahad Al Shatil Ashrafee Popy Sarker abu Zafor md. Salahuddin Mohammad Kamrul Ahsan Department of Nephrology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Orthodontics and Dento-Facial Orthopaedics Dhaka Dental College and Hospital (DDCH) Dhaka Bangladesh Department of Nephrology Mymensingh Medical College Hospital (MMCH) Mymensingh Bangladesh Holy Family Red Crescent Medical College Hospital (HFRCMCH) Dhaka Bangladesh

Background: Diabetes mellitus (DM) is the leading cause of end stage renal disease (ESRD) worldwide. Although DM with proteinuria is the ultimate result of diabetic nephropathy (DN), a wide spectrum of non-diabetic renal diseases (NDRD) can occur in such patients. Objective: To observe the frequency and histological pattern of NDRD in diabetic patients with proteinuria and to explore their association with clinical and laboratory parameters. Methods: This cross-sectional study was conducted in the Department of Nephrology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from April 2016 to September 2017. In this study a total of 38 cases of DM with proteinuria (>1 gm/24-hour) were selected purposively. Renal biopsy was done in all patients. Based on histological findings they were categorized into two groups;Group 1 with NDRD and Group II with DN. Their clinical and laboratory parameters were analyzed and compared. Results: Among the total study subjects, 21 (55.3%) were male and 17 (44.7%) were female, mean (±SD) age 43.45 ± 9.99 years in the NDRD group and 41.57 ± 9.50 years in the DN group. Thirty one cases (81.6%) out of thirty eight had NDRD and seven (18.4%) cases had isolated DN;therefore more than two third cases had NDRD. Duration of DM was found to be significantly shorter (p = 0.004) in the NDRD group. Diabetic retinopathy was present in 12.9% cases in NDRD group vs. 57.1% cases in DN group (p = 0.025). Frequency of microscopic hematuria was significantly higher (90.3%) in NDRD patients (p = 0.002). Conclusion: The frequency of NDRD in type 2 diabetic patients other than diabetic nephropathy is relatively high. Membrano proliferative glomeru-lonephritis and membranous nephropathy are more common in NDRD. Absence of diabetic retinopathy, presence of hematuria and shorter duration of DM are markers associated with NDRD in type 2 DM, which are important indicators for renal biopsy in diabetic patients with proteinuria.

关键词： Diabetes Mellitus (DM) Diabetic Nephropathy (DN) Non-Diabetic Renal Disease (NDRD) Renal Biopsy

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