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HA coating on Mg alloys for biomedical applications:A review

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Journal of Magnesium and Alloys 2020年第3期8卷 929-943页

作者： mostafizur Rahman Yuncang Li Cuie Wen School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Magnesium(Mg)alloys are receiving increasing attention as biodegradable implant materials in recent ***,their low corrosion resistance and fast degradation in the physiological environment remain challenges for a widespread ***(HA)coating on Mg alloys can enhance their corrosion resistance,biocompatibility,and bioactivity of the Mg alloy substrates since the compositions of HA are similar to those of the hard tissue of natural *** review analyzes the challenges of Mg alloys for biomedical applications,the fundamental requirements for biodegradable metals,and the corrosion mechanisms of Mg alloys in the physiological *** benefits of HA coatings on Mg alloys,the most commonly used surface coating techniques and their advantages and limitations,and the in vitro and in vivo performance of Mg alloys with and without surface coatings are comprehensively *** processes such as alkali treatment and then HA coating by electrochemical deposition on Mg alloys appear to be necessary to achieve a satisfactory surface coating on Mg alloys,which has been demonstrated to have the potential to improve the degrading behavior,bioactivity and *** coatings are most effective in achieving safe and bioactive Mg alloy surfaces for promising biodegradable implant applications.

关键词： Magnesium alloys Hydroxyapatite coating Corrosion Biodegradability Biocompatibility

A survey on security analysis of machine learning-oriented hardware and software intellectual property

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High-Confidence Computing 2023年第2期3卷 93-106页

作者： Ashraful Tauhid Lei Xu mostafizur Rahman Emmett Tomai Department of Computer Science University of Texas Rio Grande ValleyTX 78539USA Department of Computer Science Kent State UniversityOH 44240USA Department of Computing and Mathematics University of West GeorgiaGA 30118USA

Intellectual Property(IP)includes ideas,innovations,methodologies,works of authorship(viz.,literary and artistic works),emblems,brands,images,*** property is intangible since it is pertinent to the human ***,IP entities are indisputably vulnerable to infringements and modifications without the owner’s *** protection regulations have been deployed and are still in practice,including patents,copyrights,contracts,trademarks,trade secrets,etc.,to address these ***,these protections are insufficient to keep IP entities from being changed or stolen without *** for this,some IPs require hardware IP protection mechanisms,and others require software IP protection *** secure these IPs,researchers have explored the domain of Intellectual Property Protection(IPP)using different *** this paper,we discuss the existing IP rights and concurrent breakthroughs in the field of IPP research;provide discussions on hardware IP and software IP attacks and defense techniques;summarize different applications of IP protection;and lastly,identify the challenges and future research prospects in hardware and software IP security.

关键词： Intellectual property IP protection Patent Copyright Trademark Infringement Machine learning Integrated circuit

Bimetallic zeolitic imidazolate framework-derived substrate-free anode with superior cyclability for high-capacity lithium-ion batteries

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Journal of Materials Science & Technology 2021年第8期67卷 116-126页

作者： Bhavana Joshi Edmund Samuel Yong-il Kim Govindasami Periyasami mostafizur Rahaman Sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul136-713Republic of Korea Department of Physics NES Science CollegeSwami Ramanand Teerth Marathwada UniversityLatur RoadNandedMaharashtra431606India Department of Chemistry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Freestanding carbon nanofibers loaded with bimetallic hollow nanocage structures were *** nanocages inherited the rhombic dodecahedral morphology of the zeolitic imidazolate framework(ZIF)precursors,ZIF-8 and *** anode materials for lithium-ion batteries(LIBs),the bimetallic nanocage-loaded freestanding carbon nanofibers effectively buffered volume expansions and alleviated pulverization through their different reduction and oxidation *** higher capacities of the composite anodes arose via the formation of the Li_(x)Zn alloy and Li_(2)O by Zn and Co ions,respectively,and the enhanced conductivity conferred by the carbon nanofibers.A synergistic effect of the composite components toward the strong electrochemical performance(688 m A h·g^(-1)at 1200 m A·g^(-1))of the bimetallic nanocage-loaded fibers was demonstrated through the superior long-term stability of the anode(1048 m A h·g^(-1)after 300 cycles at 100 m A·g^(-1)),suggesting that the fabricated anode can be a promising material for use in portable LIBs.

关键词： Carbon nanofiber Nanostructure Composite anode Zeolitic imidazolate framework

Effects of florfenicol exposure on growth,development and antioxidant capacity of flounder Paralichthys olivaceus larvae at different developmental stages

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Journal of Oceanology and Limnology 2020年第2期38卷 550-559页

作者： GUO Rui ZHANG Yingqi ZHANG Xianyu ZHANG Qian CHENG Rui MD mostafizur Rahman LIU Ying College of Marine Science and Environment Dalian Ocean UniversityDalian 116023China Liaoning Aquacultural Engineering R&D Center Dalian 116023China

Antibiotics are widespread in various environmental media,and may pose a potential threat to aquatic ecosystems and non-target aquatic ***(FLO)is one of the most commonly used antibiotics in aquaculture,and extensively used to substitute chloramphenicol with its strong sterilization and low adverse ef *** this study,flounder Paralichthys olivaceus,an important economic fish species in seawater was used as an experimental *** exposure concentrations of FLO(including environmentrelated concentrations)were set at 0,0.01,0.1,1,and 10 mg/*** fects of FLO exposure for 168 h on growth and development,motor behavior,antioxidant enzyme activity,malondialdehyde(MDA)content,and thyroid hormone level of *** larvae were studied in pre-larvae(1 dpf)and post-larvae(20 dpf).The results show that the short-term FLO exposure could promote the larvae growth to some degrees,but inhibit them as the exposure time *** pre-larvae,FLO at 0.01 mg/L could stimulate the motor nerve system and increase the swimming ability,but inhibited it at 1 mg/*** the increasing dosage of FLO,the superoxide dismutase(SOD)and MDA contents were elevated,reaching the maximum in the 1 mg/L FLO *** pre-larvae were more sensitive than the post-larvae to FLO in the environment,and the growth and immune resistance could be damaged with long ***-larvae were more tolerant to external pollutants,FLO at 1 mg/L could promote the motor behavior and reduce SOD and MDA ***,FLO can be used as an antibiotic at a proper concentration but as a drug to prevent disease in a long-term way.

关键词： florfenicol Paralichthys olivaceus larvae growth and development motor behavior antioxidant capacity

Impact of industrial effluent on growth and yield of rice(Oryza sativa L.) in silty clay loam soil

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Journal of Environmental Sciences 2015年第4期27卷 231-240页

作者： Mohammad Anwar Hossain Golum Kibria Muhammad Mustafizur Rahman Mohammad Mizanur Rahman Abul Hossain Molla Mohammad mostafizur Rahman Mohammad Khabir Uddin Department of Environmental Sciences Jahangirnagar University Department of Soil Science Bangabandhu Sheikh Mujibur Rahman Agricultural University Department of Bioenvironmental Science Bangabandhu Sheikh Mujibur Rahman Agricultural University

Degradation of soil and water from discharge of untreated industrial effluent is alarming in Bangladesh. Therefore, buildup of heavy metals in soil from contaminated effluent, their entry into the food chain and effects on rice yield were quantified in a pot experiment. The treatments were comprised of 0, 25%, 50%, 75% and 100% industrial effluents applied as irrigation water. Effluents, initial soil, different parts of rice plants and post-harvest pot soil were analyzed for various elements, including heavy metals. Application of elevated levels of effluent contributed to increased heavy metals in pot soils and rice roots due to translocation effects, which were transferred to rice straw and grain. The results indicated that heavy metal toxicity may develop in soil because of contaminated effluent *** metals are not biodegradable, rather they accumulate in soils, and transfer of these metals from effluent to soil and plant cells was found to reduce the growth and development of rice plants and thereby contributed to lower yield. Moreover, a higher concentration of effluent caused heavy metal toxicity as well as reduction of growth and yield of rice, and in the long run a more aggravated situation may threaten human lives,which emphasizes the obligatory adoption of effluent treatment before its release to the environment, and regular monitoring by government agencies needs to be ensured.

关键词： Biomass Crop yield Heavy metal Industrial effluent Soil pollution

A Critical Analysis of Machine Learning and Deep Learning Methods for Cervical Cancer Screening

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Journal of Computer and Communications 2023年第12期11卷 64-85页

作者： Muhtasim Mahmudur Rahman Jakir khan Abu Sale Mohammad mostafizur Rahman Redoanul Haque Md. Sumon Ali Department of Computer Science and Engineering Bangladesh Army University of Engineering & Technology Natore Bangladesh

Cervical cancer is a serious public health issue worldwide, and early identification is crucial for better patient outcomes. Recent study has investigated how ML and DL approaches may be used to increase the accuracy of vagina tests. In this piece, we conducted a thorough review of 50 research studies that applied these techniques. Our investigation compared the outcomes to well-known screening techniques and concentrated on the datasets used and performance measurements reported. According to the research, convolutional neural networks and other deep learning approaches have potential for lowering false positives and boosting screening precision. Although several research used small sample sizes or constrained datasets, this raises questions about how applicable the findings are. This paper discusses the advantages and disadvantages of the articles that were chosen, as well as prospective topics for future research, to further the application of ml and dl in cervical cancer screening. The development of cervical cancer screening technologies that are more precise, accessible, and can lead to better public health outcomes is significantly affected by these findings.

关键词： Cervical Cancer Neoplasms Screening Machine Learning Techniques Deep Learning Techniques

Tracking of microplastics distribution patterns and their characterisation in deposited road dust from Dhaka city,Bangladesh

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Emerging Contaminants 2024年第3期10卷 386-399页

作者： Mohammad Toha R-Rafiul Rahman Sadia Sikder Md Ahedul Akbor Md mostafizur Rahman Department of Environmental Science Bangladesh University of ProfessionalsMirpurCantonmentDhaka1216Bangladesh Department of Environmental Sciences Jahangirnagar UniversitySavarDhaka1342Bangladesh Laboratory of Environmental Health and Ecotoxicology Department of Environmental SciencesJahangirnagar UniversitySavarDhaka1342Bangladesh Institute of National Analytical Research and Service(INARS) Bangladesh Council of Scientific and Industrial Research(BCSIR)DhanmondiDhaka1205Bangladesh

The widespread presence of microplastics(MPs)in road dust has considerable concern regarding their potential risks to ecosystems and human *** the massive production of plastic,the erudition of MPs distribution patterns in various sizes of deposited road dust is still limited around the ***,the aim of this research is to provide an unambiguous picture of MPs distributional pattern,identification,classification,quantification,and features from road dust in various zones and types of roadways in Dhaka,*** study examined MPs in road dust samples with particle sizes ranging from 300 to 150 mm(Group-A),149-75 mm(Group-B),andunpaved road(325 items/5 g)>soil samples(294 items/5 g),roadside dust samples(284 items/5 g),and mid-road(283 items/5 g).By taking into account all sizes of road dust samples,the MPs were classified as fiber(70.26%),fragment(26.12%),beads(0.66%),films(1.32%),and foams(1.58%).It was found that adults inhaled MPs an average of 1612 items/day,while they ingested an average of 880 items/*** had an inhalation rate of 1232 items/day and an ingestion rate of 10267 items/day,which was 4e17 times greater than in other *** study identified 22 MPs polymer types,and SEM results show that MPs surfaces are being weathered into nanoplastics,creating a more hazardous environment.

关键词： Microplastics Road dust SEM FTIR Health impact Distribution pattern

Effect of Distributional Assumption on GARCH Model into Shenzhen Stock Market： a Forecasting Evaluation

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Chinese Business Review 2006年第3期5卷 40-49页

作者： Md. mostafizur Rahman Jianping Zhu Xiamen University

This paper examines the forecasting performance of different kinds of GARCH model （GRACH, EGARCH, TARCH and APARCH） under the Normal, Student-t and Generalized error distributional assumption. We compare the effect of different distributional assumption on the GARCH models. The data we analyze are the daily stocks indexes for Shenzhen Stock Exchange （SSE） in China from April 3^rd, 1991 to April 14^th, 2005. We find that improvements of the overall estimation are achieved when asymmetric GARCH models are used with student-t distribution and generalized error distribution. Moreover, it is found that TARCH and GARCH models give better forecasting performance than EGARCH and APARCH models. In forecasting performance, the model under normal distribution gives more accurate forecasting performance than non-normal densities and generalized error distributions clearly outperform the student-t densities in case of SSE.

关键词： GARCH model forecasts student-t generalized error density stock market indices

A study of groundwater irrigation water quality in south-central Bangladesh: a geo-statistical model approach using GIS and multivariate statistics

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Acta Geochimica 2018年第2期37卷 193-214页

作者： M.Atikul Islam Md.mostafizur Rahman Md.Bodrud-Doza Md.Iftakharul Muhib Mashura Shammi Anwar Zahid Yeasmin Akter Masaaki Kurasaki Department of Chemistry Hajee Mohammad Danesh Science and Technology University Department of Environmental Sciences Jahangirnagar University Graduate School of Environmental Science Hokkaido University Department of Environmental Pollution and Process Control Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Groundwater Hydrology Bangladesh Water Development Board Department of Chemistry University of Chittagong

Southern Bangladesh＇s irrigation and drinking water is threatened by saline intrusion. This study aimed to establish an irrigation water quality index （IWQI） using a geostatistical model and multivariate indices in Gopalganj district, south-central Bangladesh. Groundwater samples were taken randomly （different depths） in two seasons （wet-monsoon and dry-monsoon）. Hydrochemical analysis revealed groundwater in this area was neutral to slightly alkaline and dominating cations were Na^＋, Mg^2＋, and Ca^2＋ along with major anions Cl^- and HCO3^-. Principal component analysis and Gibbs plot helped explain possible geochemical processes in the aquifer. The irrigation water evaluation indices showed： electrical conductivity （EC）〉750 μS/cm, moderate to extreme saline; sodium adsorption ratio （SAR）, excellent to doubtful; total hardness （TH）, moderate to very hard; residual sodium bicarbonate, safe to marginal; Kelly＇s ratio 〉1; soluble sodium percentage （SSP）, fair to poor; magnesium adsorption ratio, harmful for soil; and IWQI, moderate to suitable. In addition, the best fitted semivariogram for IWQI, EC, SAR, SSP, and TH confirmed that most parameters had strong spatial dependence and others had moderate to weak spatial dependence. This variation might be due to the different origin/sources of major contributing ions along with the influence of variable river flow and small anthropogenic contributions. Furthermore, the spatial distribution maps for IWQI, EC, SSP, and TH during both seasons confirmed the influence of salinity from the sea; low-flow in the major river system was the driving factor of overall groundwater quality in the study area. These findings may contribute to management of irrigation and/or drinking water in regions with similar groundwater problems.

关键词： Semivariogram Ordinary kriging model Salinity Irrigation water quality index GIS Hydrochemistry