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Upper Gastrointestinal Bleeding at a Public Referal Hospital in Malawi

surgical science 2014年第11期5卷 501-507页

作者： Gift Mulima javeria s.qureshi Carol shores salim Tamimi Helena Klackenberg Ake Andren-sandberg Department of surgery Kamuzu Central HospitalLilongweMalawi Department of surgery University of North CarolinaChapel HillUSA Department of Otolaryngology/Head&Neck surgery University of North CarolinaChapel HillUSA Department of surgery Karolinska UniversityStockholmSweden

Background: Upper gastrointestinal bleeding (UGIB) is a medical emergency. Timely and appropriate treatment can be lifesaving. Where medical equipment and supplies are inadequate, management of upper gastrointestinal bleeding is challenging. Methods: A retrospective review of charts of patients who were admitted during the year 2010, with a diagnosis of Upper Gastrointestinal Bleeding (UGIB), was done at Kamuzu Central Hospital, Lilongwe, Malawi. A Rockall score was applied to determine mortality risk. Results: A total number of 187 records (119 men and 68 women, mean age of 40.7 ± 15.3 years) were reviewed. The mortality rate was 23.5%, with a non-significant gender difference. Bleeding oesophageal varices were the most common clinical cause of UGIB (42.8%), with more males (63.1%) than females affected. About 40% of patients had no cause of UGIB indicated in their records. 14 (7.5%) patients had a normal oesophagogastroduodenoscopy (OGD). Oesophageal tumor was present in 2.7% of the subjects as a cause of UGIB. Access to endoscopy, for diagnosis and therapeutic intervention, and surgery (Hassab procedure) was available to less than 50% of the patients. sixteen patients (9.5%) had surgery after endoscopy due to lack of variceal banding materials.?Conclusion:?Upper gastrointestinal bleeding is an important and common clinical problem at Kamuzu Central Hospital. Oesophageal varices seem to be the commonest cause of UGIB. Inadequacy of resuscitation materials and perhaps timely diagnostic and therapeutic endoscopic and surgical interventions are important limiting factors to favourable patient outcome. Work towards regular provision and supply of interventional resources regarding UGIB management may improve patient outcome.

关键词： Upper Gastrointestinal Bleeding(UGIB) Oesophageal Varices Oesophageal Tumor Endoscopy

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Dust particle surface potential in an argonhelium plasma using the(r,q)-distribution function

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Communications in Theoretical Physics 2024年第9期76卷 141-148页

作者： Bahaaudin M Raffah A A Abid Abdullah Khan Amin Esmaeili Yas Al-Hadeethi M N s.qureshi Department of Physics Faculty of SciencesKing Abdulaziz UniversityJeddah 21589Saudi Arabia Lithography in Devices Fabrication and Development Research Group Deanship of Scientific ResearchKing Abdulaziz UniversityJeddah 21589Saudi Arabia Joint Laboratory of Plasma Application Technology Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei230026China CAs Key Laboratory of Geospace Environment University of Science and Technology of ChinaHefei230026China Department of Physics Zhejiang Normal UniversityJinhua321005China Department of Physics Graduate School of ScienceTokyo Metropolitan UniversityMinami-Osawa 1-1Hachioji City192-0397Japan Department of Physics GC UniversityLahore 54000Pakistan

In this paper,the dust particle surface potential for argon-helium plasma is evaluated analytically and numerically in the context of negatively charged dust particles by employing a power-law(r,q)-distribution *** studies have reported the argon-helium plasma and conducted a brief theoretical and experimental *** deepen our understanding further,this study aims to analyze the argon-helium plasma comprehensively using the same pattern but with the(r,q)-distribution *** this purpose,the current balance equations are derived for electron,helium and argon ions,when these charge species attain the quasineutrality *** numerically examined the currents of plasma species for a broad range of effective distribution function parameters r and *** is revealed that the surface potential of dust particles is significantly affected by the parameters r and q,helium ion-to-electron temperature ratio,argon ion-to-electron temperature ratio,and helium ion to argon ion number density *** incorporating the multi-ion(argon-helium)species,the significance of low-temperature nonMaxwellian dusty(complex)plasma is briefly examined.

关键词： dusty plasma dust charge potential plasma physics helium argon plasma r q distribution function non-Maxwellian distribution

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Computational Approach for Automated segmentation and Classification of Region of Interest in Lateral Breast Thermograms

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Computers, Materials & Continua 2024年第9期80卷 4749-4765页

作者： Dennies Tsietso Abid Yahya Ravi samikannu Basit qureshi Muhammad Babar Department of Electrical Computer and Telecommunications EngineeringBotswana International University of Science and TechnologyPalapyePrivate Bag 16Botswana College of Computer and Information sciences Prince Sultan UniversityRiyadh11586Saudi Arabia Robotics and Internet of Things Lab Prince Sultan UniversityRiyadh11586Saudi Arabia

Breast cancer is one of the major health issues with high mortality rates and a substantial impact on patients and healthcare systems *** Computer-Aided Diagnosis(CAD)tools,based on breast thermograms,have been developed for early detection of this ***,accurately segmenting the Region of Interest(ROI)fromthermograms remains *** paper presents an approach that leverages image acquisition protocol parameters to identify the lateral breast region and estimate its bottomboundary using a second-degree *** proposed method demonstrated high efficacy,achieving an impressive Jaccard coefficient of 86%and a Dice index of 92%when evaluated against manually created ground *** features were extracted from each view’s ROI,with significant features selected via Mutual Information for training Multi-Layer Perceptron(MLP)and K-Nearest Neighbors(KNN)*** findings revealed that the MLP classifier outperformed the KNN,achieving an accuracy of 86%,a specificity of 100%,and an Area Under the Curve(AUC)of *** consistency of the method across both sides of the breast suggests its viability as an auto-segmentation ***,the classification results suggests that lateral views of breast thermograms harbor valuable features that can significantly aid in the early detection of breast cancer.

关键词： Breast cancer CAD machine learning ROI segmentation thermography

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semantic segmentation and YOLO Detector over Aerial Vehicle Images

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Computers, Materials & Continua 2024年第8期80卷 3315-3332页

作者： Asifa Mehmood qureshi Abdul Haleem Butt Abdulwahab Alazeb Naif Al Mudawi Mohammad Alonazi Nouf Abdullah Almujally Ahmad Jalal Hui Liu Faculty of Computing and AI Air UniversityIslamabad44000Pakistan Department of Computer science College of Computer Science and Information SystemNajran UniversityNajran55461Saudi Arabia Department of Information systems College of Computer Engineering and SciencesPrince Sattam bin Abdulaziz UniversityAl-Kharj16273Saudi Arabia Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Cognitive systems Lab University of BremenBremen28359Germany

Intelligent vehicle tracking and detection are crucial tasks in the realm of highway ***,vehicles come in a range of sizes,which is challenging to detect,affecting the traffic monitoring system’s overall *** learning is considered to be an efficient method for object detection in vision-based *** this paper,we proposed a vision-based vehicle detection and tracking system based on a You Look Only Once version 5(YOLOv5)detector combined with a segmentation *** model consists of six *** the first step,all the extracted traffic sequence images are subjected to pre-processing to remove noise and enhance the contrast level of the *** pre-processed images are segmented by labelling each pixel to extract the uniform regions to aid the detection phase.A single-stage detector YOLOv5 is used to detect and locate vehicles in *** detection was exposed to speeded Up Robust Feature(sURF)feature extraction to track multiple *** on this,a unique number is assigned to each vehicle to easily locate them in the succeeding image frames by extracting them using the feature-matching ***,we implemented a Kalman filter to track multiple *** the end,the vehicle path is estimated by using the centroid points of the rectangular bounding box predicted by the tracking *** experimental results and comparison reveal that our proposed vehicle detection and tracking system outperformed other state-of-the-art *** proposed implemented system provided 94.1%detection precision for Roundabout and 96.1%detection precision for Vehicle Aerial Imaging from Drone(VAID)datasets,respectively.

关键词： semantic segmentation YOLOv5 vehicle detection and tracking Kalman filter sURF

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Acute optic neuritis: a clinical paradigm for evaluation of neuroprotective and restorative strategies?

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Neural Regeneration Research 2015年第10期10卷 1599-1601页

作者： sara s.qureshi Elliot M.Frohman Department of Neurology University of Texas Southwestern School of Medicine Department of Ophthalmology University of Texas Southwestern School of Medicine

What makes the acute optic neuritis model unique in an era of trials for neuroprotective and myelin repair agents？Acute optic neuritis（AON）is a common,and often the earliest manifestation of central nervous system... 详细信息

关键词： RNFL a clinical paradigm for evaluation of neuroprotective and restorative strategies VEP

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Artificial Intelligence Based Meteorological Parameter Forecasting for Optimizing Response of Nuclear Emergency Decision support system

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原子能科学技术 2024年

作者： BILAL Ahmed Khan HAsEEB ur Rehman QAIsAR Nadeem MUHAMMAD Ahmad Naveed qureshi JAWARIA Ahad MUHAMMAD Naveed Akhtar AMJAD Farooq MAsROOR Ahmad Pakistan Institute of Engineering and Applied sciences

This paper presents a novel artificial intelligence (AI) based approach to predict crucial meteorological parameters such as temperature,pressure,and wind speed,typically calculated from computationally intensive weather research and forecasting (WRF) *** meteorological data is indispensable for simulating the release of radioactive effluents,especially in dispersion modeling for nuclear emergency decision support *** of meteorological conditions during nuclear emergencies using the conventional WRF model is very complex and ***,a new artificial neural network (ANN) based technique was proposed as a viable alternative for meteorological prediction.A multi-input multi-output neural network was trained using historical site-specific meteorological data to forecast the meteorological *** evaluation of this technique was conducted to test its performance in forecasting various parameters including atmospheric pressure,temperature,and wind speed components in both East-West and North-south *** performance of developed network was evaluated on an unknown dataset,and acquired results are within the acceptable range for all meteorological *** show that ANNs possess the capability to forecast meteorological parameters,such as temperature and pressure,at multiple spatial locations within a grid with high accuracy,utilizing input data from a single ***,accuracy is slightly compromised when predicting wind speed *** mean square error (RMsE) was utilized to report the accuracy of predicted results,with values of 1.453℃for temperature,77 Pa for predicted pressure,1.058 m/s for the wind speed of U-component and 0.959 m/s for the wind speed of *** conclusion,this approach offers a precise,efficient,and wellinformed method for administrative decision-making during nuclear emergencies.

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Autonomous navigation for a wolfberry picking robot using visual cues and fuzzy control

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Information Processing in Agriculture 2021年第1期8卷 15-26页

作者： Yue Ma Wenqiang Zhang Waqar s.qureshi Chao Gao Chunlong Zhang Wei Li College of Engineering China Agricultural UniversityChina Department of Mechatronics Engineering National University of Sciences and TechnologyH-12 IslamabadPakistan

Lycium barbarum commonly known as wolfberry or Goji is considered an important ingredient in Japanese,Korean,Vietnamese,and Chinese food and *** is cultivated extensively in these countries and is usually harvested manually,which is laborintensive and tedious *** improve the efficiency of harvesting and reduce manual labor,automatic harvesting technology has been investigated by many researchers in recent *** this paper,an autonomous navigation algorithm using visual cues and fuzzy control is proposed for Wolfberry *** first,we propose a new weightage(2.4B-0.9G-R)to convert a color image into a grayscale image for better identification of the trunk of Lycium barbarum,the minimum positive circumscribed rectangle is used to describe the ***,using the contour points the least square method is used to fit the navigation line and a region of interest(ROI)is computed that improves the realtime accuracy of the ***,a set of fuzzy controllers,for pneumatic steering system,is designed to achieve real-time autonomous navigation in wolfberry *** image experiments show that the average accuracy rate of the algorithm is above 90%,and the average time consumption is approximately 162 ms,with good robustness and real-time *** experimental results show that when the speed is 1 km/h,the maximum lateral deviation is less than 6.2 cm and the average lateral deviation is 2.9 cm,which meets the requirements of automatic picking of wolfberry picking robot in real-world environments.

关键词： Visual navigation Chinese wolfberry picking Fuzzy control

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Differential elastic scattering cross sections of protons from Al in 2.4–4.8 MeV energy range

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Nuclear science and Techniques 2016年第2期27卷 97-100页

作者： Kashif shahzad Faisal J. qureshi javeria Taj Ali Awais Javaid Hussain Waheed Akram shehla Honey Ishaq Ahmad Maaza Malik National Center for Physics Quaid-i-Azam UniversityIslamabad 44000 Pakistan UNEsCO-UNIsA Africa Chair in Nanosciences/ Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge PO Box 392 Pretoria South Africa Nanosciences African Network (NANOAFNET) iThemba LABS-National Research Foundation 1 Old Faure Road Somerset West 7129 PO Box 722 Somerset West Western Cape Province South Africa

Measurement of differential elastic cross section of protons from aluminum was taken at 165° degree in the2.4–4.8 Me V energy range. The results and measured energy resonances were compared with reported *** data wi... 详细信息

关键词：能量范围微分截面弹性散射质子电子铝能量共振后向散射

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Interplay of parallel electric field and trapped electrons in kappa-Maxwellian auroral plasma for EMEC instability

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Communications in Theoretical Physics 2021年第1期73卷 78-86页

作者： M Nazeer M N s.qureshi C shen Department of Physics GC UniversityLahore(54000)Pakistan shenzhen Graduate school HIT CampusUniversity Town of ShenzhenShenzhen 518055China

In this paper,propagation characteristics of electromagnetic electron cyclotron(EMEC)waves based on kappa-Maxwellian distribution have been investigated to invoke the interplay of the electric field parallel to the Earth’s magnetic field and auroral trapped *** dispersion relation for EMEC waves in kappa-Maxwellian distributed plasma has been derived using the contribution of the parallel electric field and trapped electron *** results show that the presence of the electric field has a stimulating effect on growth rate,which is more pronounced at low values of wave *** is also observed that as the threshold value of trapped electron speed is surpassed,it dominates the effect of the parallel electric field and EMEC instability is enhanced *** electric field acts as another source of free energy,and growth can be obtained even in the absence of trapped electron drift speed and for very small values of temperature *** the present study reveals the interplay of the parallel electric field and trapped electron speed on the excitation of EMEC waves in the auroral region.

关键词： EMEC waves kappa-Maxwellian distribution trapped electrons parallel electric field in aurora

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Effect on Landau damping rates for a non-Maxwellian distribution function consisting of two electron populations

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Chinese Physics B 2013年第3期22卷 358-365页

作者： M.N.s.qureshi s.sehar H.A.shah J.B.Cao space science Institute Beihang University Department of Physics Government College University

In many physical situations where a laser or electron beam passes through a dense plasma,hot low-density electron populations can be generated,resulting in a particle distribution function consisting of a dense cold population and a small hot *** of such low-density electron distributions can alter the wave damping rate.A kinetic model is employed to study the Landau damping of Langmuir waves when a small hot electron population is present in the dense cold electron population with non-Maxwellian distribution *** of plasma from Maxwellian distributions significantly alters the damping rates as compared to the Maxwellian *** damping is found for highly nonMaxwellian distributions as well as plasmas with a higher density and hot electron *** of weak damping is also established when the distribution contains broadened flat tops at the low energies or tends to be *** results may be applied in both experimental and space physics regimes.

关键词： Landau damping Langmuir waves two electron populations non-Maxwellian distribution function

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