检索结果-南通市图书馆

Asian Pacific Journal of Tropical Biomedicine 2017年第4期7卷 352-357页

作者： Yead Morshed Nibir Ahmed Faisal Sumit anwarul azim Akhand Nazmul Ahsan Mohammad Shahnoor Hossain Department of Genetic Engineering and Biotechnology University of DhakaDhaka 1000Bangladesh

Objective: To determine the total polyphenol content, antioxidant activity and antibacterial properties of the extracts of different Bangladeshi tea varieties such as flowery broken orange pekoe, broken orange pekoe, red dust and green ***: Total phenolic and flavonoid contents were determined by Folin–Ciocalteu and aluminum chloride colorimetric assay, *** antioxidant capacity was determined by ferric ion reducing antioxidant power and phosphomolybdenum *** activity was evaluated by disc diffusion method in agar plate and subsequently, the minimum inhibitory concentration was determined by broth dilution ***: Total phenolic and flavonoid contents were significantly higher(P < 0.05) in green tea compared to other three black tea *** green tea also showed a higher free radical scavenging and antioxidant activities than all the other tea varieties tested(P < 0.05).In addition, the extracts of all four tea varieties showed inhibitory activity against several pathogenic bacteria and also the same trend of higher antimicrobial activity of green tea than other tea varieties was ***: Taken together, the results of this study demonstrated that Bangladeshi tea,especially the green tea, may act as a substitute for natural antioxidants and as a promising antibacterial agent for beneficial influence in human health.

关键词： Tea extracts Antioxidant activity Antibacterial activity Total phenolic content

Computational Performances of OFDM Using Different FFT Algorithms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Communications, Network and System Sciences 2013年第7期6卷 346-350页

作者： anwarul azim Department of Electrical and Electronic Engineering East West University Dhaka Bangladesh

In this paper, an intuitive comparison of the computational performance of orthogonal frequency division multiplexing (OFDM) system has been made in terms of complex calculations required using different Fourier transform techniques. The different transform techniques are introduced such as discrete Fourier transform (DFT) and various types of fast Fourier transform (FFT) as 2-radix FFT, 4-radix FFT etc. and the very recent very fast Fourier transform (VFFT). With intuitive mathematical analysis, it has been shown that with the reduced complexity that VFFT can offer, OFDM performance can be greatly improved in terms of calculations needed.

关键词： Orthogonal Frequency Division Multiplexing (OFDM) Discreate Fourier Transform (DFT) Fast Fourier Transform (FFT) Very Fast Fourier Transform (VFFT)

Impairment of extra-high frequency auditory thresholds in subjects with elevated levels of fasting blood glucose

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Otology 2018年第1期13卷 29-35页

作者： Anindya Das Ahmed Faisal Sumit Nazmul Ahsan Masashi Kato Nobutaka Ohgami anwarul azim Akhand Department of Genetic Engineering and Biotechnology University of Dhaka Dhaka Bangladesh BRAC James P Grant School of Public Health BRAC University Dhaka Bangladesh Department of Occupational and Environmental Health Nagoya University Graduate School of Medicine Nagoya Japan

This study was performed to assess whether there is an association between elevated Fasting Blood Glucose(FBG) and hearing impairment in Bangladeshi population. A total of 142 subjects(72 with elevated FBG; 70 control) were included in the study. The mean auditory thresholds of the control subjects at 1,4,8 and 12 kHz frequencies were 6.35 ± 0.35,10.07 ± 0.91,27.57 ± 1.82, 51.28 ± 3.01 dB SPL(decibel sound pressure level), respectively and that of the subjects with elevated FBG were 8.33 ± 0.66,14.37 ± 1.14, 38.96 土 2.23, and 71.11 ± 2.96 ***. The auditory thresholds of the subjects with elevated FBG were significantly(p 10 years) showed significantly(p 40 years) and younger(<40 years) age groups compared to the respective controls. The binary logistic regression analysis showed a 5.79-fold increase in the odds of extra-high frequency hearing impairment in diabetic subjects after adjustment for age, gender and BMI. This study provides conclusive evidence that auditory threshold at an extra-high frequency could be a sensitive marker for hearing impairment in diabetic subjects.

关键词： Fasting blood glucose Hearing impairment Auditory thresholds Extra-high frequency

Ultrasensitive plasmonic sensor based on MDM waveguide containing Persian Orsi window cavities for refractive index and blood plasma sensing

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第7期20卷 406-411页

作者： Mohammad Ghanavati Mohammad azim Karami School of Electrical Engineering Iran University of Science and TechnologyTehran 16846-13114Iran12

We developed a plasmonic refractive index(RI)with a metal-dielectric-metal(MDM)structure that utilizes two Persian Orsi windows-like separated cavities with a high figure of merit(FoM)and *** simulated and optimized Ag-air-Ag MDM sensor for surface plasmon resonance(SPR)offers high RI sensitivity(SRI)and the ability to detect blood plasma concentration(BPC).The results verified that structural parameters have an effect on SRI,full width at half maximum(FWHM),FoM,sensitivity of blood plasma(S_(p))for right and left peaks,whose values are 1345.45 nm·RIU^(−1),32 nm,42.04 RIU^(−1),0.26 and 0.19 nm·L·g^(-1),*** proposed design opens a new horizon in sensor development.

关键词： index utilize MDM

Impact of COVID-19 pandemic on radiology education,training,and practice:A narrative review

在线全文

学校读者我要写书评

暂无评论

World Journal of Radiology 2021年第11期13卷 354-370页

作者： Md anwarul azim Majumder Uma Gaur Keerti Singh Latha Kandamaran Subir Gupta Mainul Haque Sayeeda Rahman Bidyadhar Sa Mizanur Rahman Fidel Rampersad Faculty of Medical Sciences The University of the West IndiesCave Hill CampusCave Hill BB23034Barbados Unit of Pharmacology Faculty of Medicine and Defence HealthUniversiti Pertahanan Nasional Malaysia(National Defence University of Malaysia)Kem Perdana Sugai BesiKuala Lumpur 57000Malaysia School of Medicine American University of Integrative Sciences(AUIS)Bridgetown BB11318Barbados Faculty of Medical Sciences The University of the West IndiesSt Augustine CampusSt Augustine 33178Trinidad and Tobago Principal's Office International Medical CollegeDhaka 1207Bangladesh

Radiology education and training is of paramount clinical importance given the prominence of medical imaging utilization in effective clinical *** incorporation of basic radiology in the medical curriculum has continued to evolve,focusing on teaching image interpretation skills,the appropriate ordering of radiological investigations,judicious use of ionizing radiation,and providing exposure to interventional *** in radiology have been driven by the digital revolution,which has,in turn,had a positive impact on radiology education and *** the advent of the corona virus disease 2019(COVID-19)pandemic,many training institutions and hospitals adhered to directives which advised rescheduling of non-urgent outpatient *** inevitably impacted the workflow of the radiology department,which resulted in the reduction of clinical in-person case reviews and consultations,as well as in-person teaching *** medical schools and research centers completely suspended face-to-face academic *** led to challenges for medical teachers to complete the radiology syllabus while ensuring that teaching activities continued safely and *** a result,online teaching platforms have virtually replaced didactic face-to-face *** educators also sought other strategies to incorporate interactive teaching sessions while adopting the e-learning approach,as they were cognizant of the limitations that this may have on students’clinical *** to online methods to review live cases,journal clubs,simulation-based training,clinical interaction,and radiology examination protocolling are a few examples of successfully addressing the limitations in reduced clinical *** this review paper,we discuss(1)The impact of the COVID-19 pandemic on radiology education,training,and practice;(2)Challenges and strategies involved in delivering online radiology education for undergraduates and postgraduates d

关键词： Radiology Education Training Practice COVID-19 pandemic Impact

Twinning aspects and their efficient roles in wrought Mg alloys:A comprehensive review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第6期12卷 2201-2230页

作者： S.S.A.Shah Manping Liu azim Khan Farooq Ahmad M.R.Abdullah Xingquan Zhang Shiwei Xu Zhen Peng School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China School of Mechanical Engineering Anhui University of TechnologyMáanshan 243002China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is widely recognized as an effective and cost-efficient method for controlling the microstructure and properties of wrought magnesium(Mg)***,twins play a crucial role in initiating dynamic recrystallization(DRX),while twin regions experience rapid recrystallization during static recrystallization(SRX).The activation of twinning can lead to changes in lattice orientation,significantly impacting the final texture in Mg *** active roles of twinning are influenced by various factors during the activation process,and the mobility of twin boundaries(TB)can be amplified by stress effects,dislocation interactions,and thermal ***,annealing treatments that involve proper segregation or precipitation on TBs serve to stabilize them,restraining their *** such as segregation may also alter the twinning propensity in Magnesium-rare earth(Mg-RE)***{10–11}contraction twins(CT)and{10–11}-{10–12}double twins(DT)can promote dynamic recrystallization(DRX),they also pose a risk as potential sources of voids and ***,understanding the nucleation and growth mechanisms of twinning is crucial,and these aspects are briefly reviewed in this *** the factors mentioned above,this article summarizes the recent research progress in this field,shedding light on advancements in recent eras.

关键词： Mg alloys Twinning Recrystallization Texture Mechanical properties

Analysis of Urban Public Building Space Design Strategies in the Digital Age

在线全文

学校读者我要写书评

暂无评论

Journal of World Architecture 2024年第2期8卷 140-145页

作者： Pan Liang Sharul azim Sharudin City University Malaysia Petaling Jaya 46100SelangorMalaysia Lishui Vocational and Technical College Lishui 323000Zhejiang ProvinceChina

Urban public building spaces involve various aspects of people’s daily activities and interactions,making the rationality and scientific nature of the design of these spaces *** article first discusses the role and impact of digitization in the design of public building spaces,covering aspects such as digital design methods,visual expression and presentation,augmented reality’s spatial interaction experience,and integrated design and *** that,it analyzes the process of digitized urban public building space design by exploring topics like digital space design and modeling,visual representation of digital spaces,digital performance analysis of spaces,and the integration of digital *** article aims to provide insights and references for urban public building space design in the digital era.

关键词： Digital age Public building Space design Strategies

Study on the Influencing Factors and Mechanisms of the Evolution of the Architectural Characteristics of Guangfu Ancestral Halls in the Ming and Qing Dynasties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of World Architecture 2024年第1期8卷 83-90页

作者： Yanming Chen Sharul azim Sharudin Yunlin Xu Faculty of Creative Industries City University Malaysia46100 Petaling layaSelangorMalaysia College of Forestry and Landscape Architecture South China Agricultural UniversityGuangzhou 510642Guangdong ProvinceChina

This paper discusses ancestral hall architecture within the context of the Cantonese folk lineage in the Pearl River *** a typological research approach and chronological analysis,various factors that have influenced the evolution of ancestral hall architecture are *** study specifically investigates the features of ancestral halls during the Ming and Qing *** periods of ancient China are analyzed:The transition from Ming to Qing,the mid-Qing dynasty,and the late Qing *** variables of each period and how they influence the evolution of architectural typological features are *** on our analysis,architectural features are related to economic and social factors,materials available,and craftsmanship of the construction workers.

关键词： Guangfu ancestral halls Architectural type characteristics Evolutionary influences Evolutionary impact mechanisms

Preparation of Durable Antibacterial Polyester Fabrics by Grafting with the Natural Quaternary Ammonium Compound Betaine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2024年第9期15卷 378-398页

作者： Md Shariful Islam Md Kamrul Hasan Arifur Rahman Shakhauat Hossen Md anwarul Islam Sachi Xinbo Ding School of Textile Science and Engineering International Silk Institute Zhejiang Sci-Tech University Hangzhou China King Graduate School Monroe College Bronx NY USA

Recently, the textile industry has increasingly advocated for natural resource-based healthcare textiles. This research presents a facile and eco-friendly approach to developing durable antibacterial polyester fabrics. Polyester fabric was first subjected to an alkaline hydrolysis to impart hydroxyl groups on the fiber surface. A natural antibacterial agent, betaine, was then covalently bonded to the hydrolyzed polyester fiber surface through esterification. XPS, Raman, SEM, and Wicking measurements were carried out to verify the esterification reaction. Antibacterial tests confirmed that betaine treatment grafted polyester fabrics revealed a remarkable antibacterial effect with inhibition rates > 99.9% against both E. coli and S. aureus and still remained inhibition rates of up to 91.5% against both bacteria after home washing for 20 cycles. Moreover, the modification significantly increased the capillary effect of polyester fabric but did not cause apparent adverse effects on the fabric’s hand or tensile strength. Overall, this grafting strategy for durable, antibacterial polyester fabric represents a significant practicality in the textile industry.

关键词： Polyester Fabric Betaine Antibacterial Durability Capillary

A Survey and Tutorial of EEG-Based Brain Monitoring for Driver State Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2021年第7期8卷 1222-1242页

作者： Ce Zhang azim Eskandarian Virginia Tech Mechanical Engineering Department ASIM Lab Virginia 24061-0131 USA

The driver’s cognitive and physiological states affect his/her ability to control the ***,these driver states are essential to the safety of *** design of advanced driver assistance systems(ADAS)or autonomous vehicles will depend on their ability to interact effectively with the driver.A deeper understanding of the driver state is,therefore,***(EEG)is proven to be one of the most effective methods for driver state monitoring and human error *** paper discusses EEG-based driver state detection systems and their corresponding analysis algorithms over the last three ***,the commonly used EEG system setup for driver state studies is ***,the EEG signal preprocessing,feature extraction,and classification algorithms for driver state detection are ***,EEG-based driver state monitoring research is reviewed in-depth,and its future development is *** is concluded that the current EEGbased driver state monitoring algorithms are promising for safety ***,many improvements are still required in EEG artifact reduction,real-time processing,and between-subject classification accuracy.

关键词： Advanced driver assistance systems(ADAS) data analysis electroencephalography(EEG) intelligent vehicles machine learning algorithms neural network.