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Hydrostatic reduction of intussusception with intermittent radiography:an alternative to fluoroscopy or ultrasoundguided reduction in low-income and middle-income countries

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World Journal of Pediatric Surgery 2021年第1期4卷 14-20页

作者： tanvir Kabir Chowdhury Md.Qumrul Ahsan Mohammad Zonaid Chowdhury Md.Tameem Shafayat Chowdhury Md.Sharif Imam Md.Afruzul Alam Md.Abdullah Al Farooq Department of Pediatric Surgery Chittagong Medical CollegeChattogramBangladesh Department of Radiology and Imaging Chattogram Maa-O Shishu Hospital Medical CollegeChattogramBangladesh Radiology and Imaging Centre for Specialized Care and Research(CSCR)ChattogramBangladesh

Background Although hydrostatic reduction of intussusception with ultrasound(US)or fluoroscopy guidance is well known,it is not yet well established in many low-income and middle-income *** aim of the study is to report our results of hydrostatic reduction with intermittent radiography,which has the potential to be practiced in resource-limited *** We retrospectively analyzed our patients with intussusception from 2009 to 2019(11 years).Hydrostatic reduction was performed using water-soluble contrast medium(iopamidol),and reduction was followed with intermittent X-rays taken after every 50 mL of diluted contrast *** procedure was not continuously monitored by US or *** in outcome based on age and gender,and yearly trends of admission for intussusception,types of treatment and mortality were *** Among 672 patients,the ratio of boys to girls was 2.46:1.0,and their ages ranged from 1 month to 15 years(median 8 months).Hydrostatic reduction was performed successfully in 351(52.23%)patients;308(45.83%)patients underwent surgery;and 13(1.93%)patients died before any *** were significant differences in age between patients with successful hydrostatic reduction(median 7 months)and patients needing surgery(median 9 months)(p<0.001).The number of successful hydrostatic reductions increased during the 11 years of the study(R2=0.88).One patient(0.15%)died after hydrostatic reduction,and 10(1.49%)died after *** Hydrostatic reduction with intermittent radiography was performed successfully in more than half of the patients with acceptable complication rates.

关键词： income hydrostatic diluted

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Risk factor profiles for gastric cancer prediction with respect to Helicobacter pylori:A study of a tertiary care hospital in Pakistan

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Artificial Intelligence in Gastroenterology 2023年第1期4卷 10-27页

作者： Shahid Aziz Simone König Muhammad Umer Tayyab Saeed Akhter Shafqat Iqbal Maryum Ibrar Tofeeq Ur-Rehman tanvir Ahmad Alfizah Hanafiah Rabaab Zahra Faisal Rasheed Patients Diagnostic Lab Isotope Application DivisionPakistan Institute of Nuclear Science and TechnologyIslamabad 44000Pakistan Department of Microbiology Quaid-i-Azam UniversityIslamabad 45320Pakistan Interdisciplinary Center for Clinical Research Core Unit ProteomicsUniversity of MünsterMünster 48149Germany Management Information System Division Pakistan Institute of Nuclear Science and TechnologyIslamabad 44000Pakistan Centre for Liver and Digestive Diseases Holy Family HospitalRawalpindi 46300Pakistan Pakistan Scientific and Technological Information Centre Quaid-i-Azam UniversityIslamabad 45320Pakistan Department of Pharmacy Quaid-i-Azam UniversityIslamabad 45320Pakistan Faculty of Medicine Department of Medical Microbiology and ImmunologyUniversiti Kebangsan MalaysiaCherasKuala Lumpur 56000Malaysia

BACKGROUND Gastric cancer(GC)is the fourth leading cause of cancer-related deaths *** relies on histopathology and the number of endoscopies is *** pylori(***)infection is a major risk *** To develop an in-silico GC prediction model to reduce the number of diagnostic surgical *** meta-data of patients with gastroduodenal symptoms,risk factors associated with GC,and *** infection status from Holy Family Hospital Rawalpindi,Pakistan,were used with machine *** A cohort of 341 patients was divided into three groups[normal gastric mucosa(NGM),gastroduodenal diseases(GDD),and GC].Information associated with socioeconomic and demographic conditions and GC risk factors was collected using a *** infection status was determined based on urea breath *** association of these factors and histopathological grades was assessed statistically.K-Nearest Neighbors and Random Forest(RF)machine learning models were *** This study reported an overall frequency of 64.2%(219/341)of *** infection among enrolled *** was higher in GC(74.2%,23/31)as compared to NGM and GDD and higher in males(54.3%,119/219)as compared to *** abdominal pain(72.4%,247/341)was observed than other clinical symptoms including vomiting,bloating,acid reflux and *** majority of the GC patients experienced symptoms of vomiting(91%,20/22)with abdominal pain(100%,22/22).The multinomial logistic regression model was statistically significant and correctly classified 80%of the GDD/GC ***,income level,vomiting,bloating and medication had significant association with GDD and GC.A dynamic RF GC-predictive model was developed,which achieved>80%test *** GC risk factors were incorporated into a computer model to predict the likelihood of developing GC with high sensitivity and *** model is dynamic and will be further improved and validated by including n

关键词： Gastric cancer Gastritis Machine learning Prediction model Helicobacter pylori

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Dual Mode-Multiple Output SEPIC Converter Integrated with Passive Ripple Cancelling Circuit for Standalone PV Energy Harvesting System

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Journal of Power and Energy Engineering 2016年第11期4卷 1-18页

作者： Sharmin Sobhan Md. Ashraful Hoque Golam Sarowar tanvir Ahmad Abdul Mannan Farhan Department of Electrical & Electronic Engineering Ahsanullah University of Science & Technology Dhaka Bangladesh Department of Electrical & Electronic Engineering Islamic University of Technology Dhaka Bangladesh Martin Luther University of Halle-Wittenberg Halle Germany

This document addresses an exhaustive standalone Photovoltaic (PV) energy harvesting system considering two crucial issues: system efficiency and cost effectiveness. It contributes a compact resolution with a combined feature of Dual Mode-Multiple Output (DMMO) associated with input ripple reduction technique. Control strategy incorporates with aspect of Maximum Power Point Tracking (MPPT) and output voltage levels regulation. A theoretical analysis is conducted to evaluate the effect of ripple current on PV power. Proposed dual mode converter achieves efficiency of 98.36% and 97.76% respectively for mode-1 and mode-2 operation. However, simulation is performed applying MATLAB/SIMULINK tools to analyze the feasibility of the recommended system.

关键词： Photovoltaic Cell Current Ripple Reduction Dual Mode Converter Multiple Outputs Efficiency

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基于Faster R-CNN的多目标检测研究

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计算机与数字工程 2020年第10期48卷 2393-2399页

作者：许雪 tanvir Ahmad 华北电力大学控制与计算机工程学院北京102206

深度学习的快速发展为计算机视觉带来了新的机遇,特别是对于目标检测领域。此外,它为智能交通领域的车辆和行人检测提供了一种新方法。然而,交通图像数据的收集和人工标注工作是十分繁琐的。在目标检测模型的训练过程中,没有明确的方法... 详细信息

深度学习的快速发展为计算机视觉带来了新的机遇,特别是对于目标检测领域。此外,它为智能交通领域的车辆和行人检测提供了一种新方法。然而,交通图像数据的收集和人工标注工作是十分繁琐的。在目标检测模型的训练过程中,没有明确的方法来选择预训练模型,训练方式和迭代次数。论文利用车载摄像头录制的交通视频来截取交通图像,人工标注交通数据集,采用Faster R-CNN这一深度学习的对象检测算法分析了训练数据集规模、预训练模型、训练方式、迭代次数等对车辆行人检测结果的影响。实验结果分析为今后对象检测模型的训练尤其是交通图像对象检测模型的训练提供数据支撑,从而为智能交通的车辆行人检测研究提供便利。

关键词：多目标深度学习对象检测智能交通

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Finding the real COVID-19 case-fatality rates for SAARC countries

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Biosafety and Health 2021年第3期3卷 164-171页

作者： Md Rafil Tazir Shah tanvir Ahammed Aniqua Anjum Anisa Ahmed Chowdhury Afroza Jannat Suchana Department of Statistics Shahjalal University of Science and TechnologySylhet 3114Bangladesh Biomedical Research Foundation Dhaka 1230Bangladesh

The crude case fatality rate(CFR),because of the calculation method,is the most accurate when the pandemic is over since there is a possibility of the delay between disease onset and *** crude CFR measures can better explain the pandemic situation by improving the CFR ***,no study has thoroughly investigated the COVID-19 adjusted CFR of the South Asian Association For Regional Cooperation(SAARC)*** study estimated both survival interval and underreporting adjusted CFR of COVID-19 for these ***,we assessed the crude CFR between genders and across age groups and observed the CFR changes due to the imposition of fees on COVID-19 tests in *** the daily records up to October 9,we implemented a statistical method to remove the delay between disease onset and outcome bias,and due to asymptomatic or mild symptomatic cases,reporting rates lower than 50%(95%CI:10%–50%)bias in crude *** found that Afghanistan had the highest CFR,followed by Pakistan,India,Bangladesh,Nepal,Maldives,and Sri *** estimated crude CFR varied from 3.708%to 0.290%,survival interval adjusted CFR varied from 3.767%to 0.296%and further underreporting adjusted CFR varied from 1.096%to 0.083%.Furthermore,the crude CFRs for men were significantly higher than that of women in Afghanistan(4.034%vs.2.992%)and Bangladesh(1.739%vs.1.337%)whereas the opposite was observed in Maldives(0.284%vs.0.390%),Nepal(0.006%vs.0.007%),and Pakistan(2.057%vs.2.080%).Besides,older age groups had higher risks of ***,crude CFR increased from 1.261%to 1.572%after imposing the COVID-19 test fees in ***,the authorities of countries with higher CFR should be looking for strategic counsel from the countries with lower CFR to equip themselves with the necessary knowledge to combat the ***,caution is needed to report the CFR.

关键词： COVID-19 SARS-CoV-2 Case fatality rates SAARC Southeast Asia

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A Photonic Crystal Fiber Based Asymmetric Slotted Structured Highly Sensitive Refractive Index Plasmonic Biosensor

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Journal of Sensor Technology 2022年第1期12卷 1-17页

作者： Md. Arafat Rahman tanvir Ahmed Md. Ismail Haque Md. Shamim Anower Department of Electrical and Electronic Engineering Rajshahi University of Engineering and Technology Rajshahi Bangladesh Department of Electrical and Electronic Engineering International Islamic University Chittagong Chittagong Bangladesh

Surface plasmon resonance (SPR) sensors have grown in popularity owing to their sensitivity, precision, and capacity for a variety of applications, including detection, monitoring, and sensing, among others. Sensitivity and resolution are two areas where this technology has room for development. A plasmonic biosensor based on an asymmetric slotted PCF structure with extremely high sensitivity has been described and theoretically investigated. This high performance sensor is constructed and completely characterized using finite element method in COMSOL Multiphysics software environment. Sensitivity and resolution are analyzed as performance parameters for the proposed sensor. Numerical simulation exhibits the maximum wavelength-sensitivity of 1100 nm/RIU with 9.09 × 10-6 RIU resolution in the broad measurement range of refractive index from 1.30 to 1.44. A polarization controller can be used to fine-tune this extremely sensitive and wide-ranging refractive index sensor to fulfil a variety of practical needs. This is performed with the consideration of the variation in the refractive index (RI) of the analyte channels. In comparison with earlier PCF-based sensors, the fiber design structure is basic, symmetrical, simple to produce, and cost-effective. Because of the asymmetric air holes and higher sensitivities of the refractive index detector, it is possible to identify biomolecules, biochemicals and other analytes.

关键词： Surface Plasmon Resonance (SPR) Sensor High Sensitivity Photonic Crystal Fiber (PCF) Optical Fiber Sensor

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uPAR antibody(huATN-658) and Zometa reduce breast cancer growth and skeletal lesions

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Bone Research 2020年第2期8卷 197-208页

作者： Niaz Mahmood Ani Arakelian Haseeb Ahmed Khan Imrana tanvir Andrew P.Mazar Shafaat A.Rabbani Department of Medicine McGill UniversityMontréalQC H4A3J1Canada Fatima Memorial Hospital System LahorePakistan Monopar Therapeutics WilmetteIL 60091USA

Urokinase plasminogen activator receptor(uPAR) is implicated in tumor growth and metastasis due to its ability to activate latent growth factors, proteases, and different oncogenic signaling pathways upon binding to different ligands. Elevated u PAR expression is correlated with the increased aggressiveness of cancer cells, which led to its credentialing as an attractive diagnostic and therapeutic target in advanced solid cancer. Here, we examine the antitumor effects of a humanized anti-u PAR antibody(huATN-658) alone and in combination with the approved bisphosphonate Zometa(Zoledronic acid) on skeletal lesion through a series of studies in vitro and in vivo. Treatment with huATN-658 or Zometa alone significantly decreased human MDA-MB-231 cell proliferation and invasion in vitro, effects which were more pronounced when huATN-658 was combined with Zometa. In vivo studies demonstrated that huATN-658 treatment significantly reduced MDA-MB-231 primary tumor growth compared with controls. In a model of breast tumor-induced bone disease, huATN-658 and Zometa were equally effective in reducing skeletal lesions. The skeletal lesions were significantly reduced in animals receiving the combination of huATN-658 + Zometa compared with monotherapy treatment. These effects were due to a significant decrease in osteoclastic activity and tumor cell proliferation in the combination treatment group. Transcriptome analysis revealed that combination treatment significantly changes the expression of genes from signaling pathways implicated in tumor progression and bone remodeling. Results from these studies provide a rationale for the continued development of huATN-658 as a monotherapy and in combination with currently approved agents such as Zometa in patients with metastatic breast cancer.

关键词： skeletal breast invasion

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一种基于YOLO的交通目标实时检测方法

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计算机与数字工程 2020年第9期48卷 2162-2167页

作者：王思雨 tanvir Ahmad 华北电力大学控制与计算机工程学院北京102206

随着大数据、云计算、移动互联网等技术的迅速发展,人工智能的技术逐渐成熟,无人驾驶逐渐成为可能。而无人驾驶最重要的一个技术点就是图象识别,通过图像识别前方车辆、行人、障碍物、道路以及交通信号灯和交通标识。通过自动驾驶可以... 详细信息

随着大数据、云计算、移动互联网等技术的迅速发展,人工智能的技术逐渐成熟,无人驾驶逐渐成为可能。而无人驾驶最重要的一个技术点就是图象识别,通过图像识别前方车辆、行人、障碍物、道路以及交通信号灯和交通标识。通过自动驾驶可以减轻驾驶员的负担,减少交通事故的发生频率。论文收集了多个城市的交通道路图像,通过分析交通目标特点,对其车辆、行人以及非机动车进行标注,将其作为样本进行训练。采用一种基于YOLO的深度学习实时目标检测方法,实现对交通目标的实时检测。并通过YOLO最新两个版本进行对比分析,实验结果表明采用YOLOv3进行交通目标检测能够达到一种实时检测的效果,并且能够在保持检测速度的情况下提高检测准确性。

关键词：无人驾驶人工智能深度学习 YOLO 目标检测

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Electromagnetic Response Studies of the Antenna for Deep Water Deep Target CSEM Environments

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Journal of Electromagnetic Analysis and Applications 2012年第12期4卷 513-522页

作者： Noorhana Yahya Nadeem Nasir Majid Niaz Akhtar Muhammad Kashif tanvir Hussain Hasnah Mohd Zaid Afza Shafie Electrical and Electronic Engineering Department Tronoh Malayia Electrical and Electronic Engineering Department Tronoh Malayia 3Fundamental and Applied Science Department National Textile University Faisalabad Pakistan Fundamental and Applied Science Department Tronoh Malayia Fundamental and Applied Science Department Tronoh Malayia 2Electrical and Electronic Engineering Department Tronoh Malayia Mechanical Engineering Department Universiti Teknologi PETRONAS Tronoh Malaysia.

The Controlled Source Electromagnetic Method (CSEM) is used for offshore hydrocarbon exploration. Hydrocarbon detection in seabed logging (SBL) is a very challenging task for deep hydrocarbon reservoirs. The electromagnetic field response of an antenna is unable to detect deep hydrocarbon reservoirs due to a weak electromagnetic signal response in the seabed logging environment. This work premise deals with the comparison of the electromagnetic signal strength of a new antenna with a straight antenna and the orientation of an antenna for deep target hydrocarbon exploration. Antenna position and orientation (Tx and Ty) was studied using Computer Simulation Technology software (CST) for deep targets in marine CSEM environments. The model area was assigned as (40 ′ 40 km) to replicate the real seabed environment. From the results, the new dipole antenna shows an 804% and 278% increase in electric and magnetic field strength than the straight antenna. An electric (E) and magnetic (H) field component study was done with and without the presence of a hydrocarbon reservoir. Ex and Hz field component responses with the new antenna at the1 kmtarget were measured in a deep water environment. It was analyzed that the antenna shows 53.10% (Ex) and 83.13% (Hz) field difference in deep water with and without a hydrocarbon reservoir at the30 mantenna position from the sea floor. From the antenna orientation results, it was observed that, the electric field Ex and magnetic field Hz responses decreased from 18% to 12% and 21% to 16%, respectively but was still able to detect the deep target hydrocarbon reservoir at the4 kmtarget depth. This EM antenna may open new frontiers for the oil and gas industry for deep target hydrocarbon detection (HC).

关键词： Control Source Electromagnetic (CSEM) Seabed Logging (SBL) Antenna Computer Simulation Technology (CST) Hydrocarbon (HC)

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孟加拉国儿童贫困治理的实践探索——以吉大港省为例

孟加拉国儿童贫困治理的实践探索——以吉大港省为例

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作者：侯赛因（tanvir Hossain）华东理工大学

学位级别：硕士

儿童贫困问题是世界普遍性问题,尤其是在经济不发达、社会保障落后的发展中国家。在孟加拉国,有35-45%的儿童属于贫困儿童,他们每天的收入不足1.25美元。在吉大港省,有近30%的儿童生活在贫困中。他们被迫在危险环境中工作,面临一系列虐... 详细信息

儿童贫困问题是世界普遍性问题,尤其是在经济不发达、社会保障落后的发展中国家。在孟加拉国,有35-45%的儿童属于贫困儿童,他们每天的收入不足1.25美元。在吉大港省,有近30%的儿童生活在贫困中。他们被迫在危险环境中工作,面临一系列虐待风险,严重影响了身心健康。儿童贫困给孟加拉国带来了一系列社会治理问题,不仅人口再生产的质量,也威胁社会稳定和国家发展未来。因而,向儿童贫困开战,消灭儿童贫困,是政府不可推卸的责任。深入研究孟加拉国等发展中国家的儿童贫困问题,为发展中国家消灭儿童贫困提供可资借鉴的经验,为具有重要的理论价值和现实意义。本文以儿童贫困的多因素理论为基础,以“结构-行动”为整合性分析框架,通过对孟加拉国吉大港省的儿童贫困治理实践的考察,结合2016年家庭收入和支出调查(HIES-2016)、2010多指标聚类调查、2013年全国童工调查以及其他国家和地方层面的调查,全面展现了孟加拉国儿童贫困治理的多维性、复杂性和艰巨性,系统探讨了发展中国家儿童贫困的总体特征、儿童贫困治理的体系构建、结构性困境、体制性约束以及优化路径,深刻揭示了发展中国家儿童贫困治理的深刻矛盾,并从制度设计与策略协同等维度探索提升儿童贫困治理的优化路径。研究发现,儿童贫困治理是检验发展中国家走向现代化的试金石。只有解决儿童贫困问题的国家,才能实现国家与社会的健康发展。孟加拉国的儿童贫困治理体系已初步形成,但也存在诸多体制性和结构性限制,需要突破“头痛医头”甚至“头痛医脚”的治理思路,从更为系统的角度找寻解决之道。第一,孟加拉国的儿童贫困治理体系构建初具雏形,形成了刚性保护与柔性支持相结合的项目推进与落实的治理体系。通过政策供给和项目推进,近9%的儿童降低了贫困水平。第二,主体孱弱与政策供给约束、制度粘性与政策执行偏差、文化认知与政策协同张力,是孟加拉国儿童贫困治理的结构性困境。有限资源与贫困儿童基数间尖锐矛盾,是孟加拉国儿童贫困治理的外生性约束,而贫困渠道受阻与贫困文化代际传递,则是孟加拉国儿童贫困治理的内生性约束。第三,从发展型社会政策看,相关制度设计与协同策略是孟加拉国儿童贫困治理的优化路径。在顶层设计上需要学习中国精准扶贫的成功密码,拓展儿童贫困治理的内涵,持续推进儿童贫困治理的多维保障体系构建。在协同策略上需要破除改造农村陈旧文化,提升儿童健康意识,树立现代儿童教育理念。总之,儿童贫困治理是一项复杂的系统工程。孟加拉国的儿童贫困治理取得了积极的成效,但也面临诸多困境。因此,采取针对性措施,进一步完善贫困儿童治理体系和治理能力,是孟加拉国等发展中国家需要重视的。儿童的健康成长直接关乎国家和民族的未来,儿童的大规模贫困引发的身心问题,十分不利于国家未来发展。从人口再生产质量的角度看,彻底解决儿童贫困是国之基础。不断推进和完善向儿童贫困开战的科学措施,是一个非常值得深入探讨的世界性议题。

关键词：儿童贫困治理结构性困境体制性约束孟加拉国

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