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Impacts of Using Al_(2)O_(3)Nano Particle to Compressor Oil on Performance of Automobile Air Conditioning System

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Frontiers in Heat and Mass Transfer 2024年第3期22卷 839-854页

作者： Karam H.Mohammed Ashraf E.Al-Mirani Bashar mahmood ali Omar Rafae Alomar Engineering Technical College of Mosul Cultural GroupNorthern Technical UniversityMosul41002Iraq College of Engineering AlNoor UniversityMosul41002Iraq

This work involves an experimental study on the performance of automobile air-conditioning systems by adding Al_(2)O_(3)nanoparticles to oil compressors to investigate their impacts on the enhancement of the speed cooling of refrigeration systems and to compare it with the system operated using only *** Al_(2)O_(3)nanoparticles have been added to the oil compressor for different ranges ofmass concentration(Ф=0.1%,Ф=0.15%andФ=0.2%).The stability of Al_(2)O_(3)nanoparticles has been tested by direct observation for different time *** results indicated that the air conditioning systemthat operated by using Al_(2)O_(3)-oil was better than the system that operated with pure ***Ф=0.2%,the results indicated that the cooling speed and the efficiency of the system operated with Al_(2)O_(3)-oil are increased by 13%and 18%,respectively,as compared to the pure oil *** study shows that the thermos-physical properties of refrigerant oil are enhanced by 15%whenФis increased.

关键词： Nanofluids compressor cooling system automobile cooling system

Quantifying the Mean Sea Level Change at the Gulf of Finland Coast Caused by the Realistic Portion of the Global Warming Forcing

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Journal of Earth Science and Engineering 2015年第7期5卷 436-448页

作者： ali Bassal mahmood Institute of Marine and Coastal Sciences University of Szczecin Szczecin 70-383 Poland

Quantifying the coastal mean sea level change causing by the winter positive phase of the North Atlantic oscillation index NAO＋ at the Gulf of Finland coast is of high priority for detecting and predicting the global warming impact in this region. Both boreal winter months and season of three long-term data station series of the coastal mean sea levels and the NAO indices were linked for two cases, i.e.： different periods and the 1977-1994 period. This study is dedicated to：（1） Detecting the exclusive impacts of the NAO＋; （2） Estimating the significant standard bivariate linear regression models; （3） Calculating the climatic linear trend coefficient by using three methods （OLS, GLS, Theil-Sen）; （4） Correcting the mean sea level series anomalies by using the significant linear regression equations as a function of NAO＋ anomalies, over the period 1977-1994; （5） Calculating the realistic linear trend caused as a function of NAO＋ for period 1977-1994 in the context of the realistic portion of the global warming. The results reveal that, the NAO＋ manifests their impacts on the coastal mean sea levels and its contribution in the configured linear trends. The realistic linear changes have detected and predicted. The Gulf of Finland coast showed the wannest regions in the context of the realistic portion of the global warming during the winters of the period 1977-1994.

关键词： North Atlantic Oscillation Gulf of Finland mean sae level changes.

The Interrelation between the NAO （North Atlantic Oscillation） and Regulated River Discharges at the Baltic Sea Drainage Basin

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Journal of Earth Science and Engineering 2014年第6期4卷 331-351页

作者： ali Bassal mahmood Institute of Marine and Coastal Sciences University of Szczecin Szczecin 70-383 Poland Marine Science Center University of Basrah Basrah Iraq

Both winter DJF （December, January, February） months and DJF season means long-term data series of 50 regulated rivers discharges rates and the NAO indices were analyzed for different spans. This study is dictated for：（1） detecting the exclusive impacts of the positive phases of NAO indices on rivers discharges rates by estimating the Linear Correlation Coefficient; （2） modeling the interrelations between the discharges rates and NAO indices by estimating the Linear Regression Models, both for manifesting the impact of the positive phase of NAO index; （3） estimating the Linear Trend Coefficient in the discharge series, for manifesting the contribution of the positive phase of NAO index. Discharge rates are mainly influenced by the two mechanisms： the positive phase of NAO index and the environmental conditions in specific catchments, that is where, the positive phase of the NAO index manifest its impact on the related rivers discharges and its contribution in the related configured trends. The discharges fluctuations patterns show some increase in the discharges values have been occurred in regions around the Northern Baltic Proper as well as in Southern Finland and Sweden. The rivers such as Lagan, Nissan, Helgean, Venta, Pamu, Porvoonjoki, Lapuanjoki, Oulujoki, Kyronjoki, Wisla, Eurajoki, Odra, Lielupe, Gota alv, Motala strom, Nykopingsan, Vuoksi, Kalajoki and Simojoki haven not linear discharges changes registered depending on the specificity of the environmental conditions at the catchments areas for those rivers. The positive phase of NAO index has a linear relation with impacted river discharge.

关键词： River discharge NAO statistical analysis climate.

Image of Multi Phase Phantoms Using Alternating Minimization Algorithm in Noninvasive Measurement Technique

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通讯和计算机（中英文版） 2012年第11期9卷 1269-1278页

作者： Abbas ali mahmood Karwi Department of Mechanical Technology Foundation of Technical Institute Babylon 96403 Iraq

COVID 19 Diagnostic Tests: A Study of 12,270 Patients to Determine Which Test Offers the Most Beneficial Results

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Surgical Science 2020年第4期11卷 82-88页

作者： ali mahmood Charisma Gajula Prianka Gajula Houston Methodist Specialty Group Methodist Sugar Land Colon & Rectal Surgery Sugar Land TX USA Institute of Academic Medicine Houston Methodist Hospitals System Houston TX USA Michael E. DeBakey Department of Surgery Baylor College of Medicine Houston TX USA Department of Surgery College of Medicine Texas A&M Health Science Center Houston Methodist Campus Houston TX USA Department of Surgery Weill Cornell Medical College New York NY USA Department of Colon & Rectal Surgery Houston Methodist Hospitals System Sugar Land TX USA Baylor University Waco TX USA Department of Medicine Houston Methodist Hospitals System Houston TX USA

COVID 19 has caused capitulation from healthcare entities all over the world. First described in Hubei, China, the virus has spread to 185 countries, showing little signs of eradication or eradication. There does not exist a medical treatment regimen or a vaccine to address COVID 19 definitively. The best response, to date, has been early diagnosis and immediate isolation or quarantine of the patient, with supportive care. As medical institutions all around the world struggle to keep up with this pandemic, there is not a consensus amongst medical professionals in the rapid diagnosis of this disease entity. Purpose: The purpose of our study was to review the literature and establish a test, or tests, that would aid the clinician in attaining a swift, yet accurate diagnosis. Methods: We searched PubMed and Google scholar and reviewed 32 articles. Keyword searches consisted of COVID 19, pandemic, diagnoses, diagnostic testing, pandemic amongst others. We compared the data obtained from these studies in an effort to find the best diagnostic test. Results: There were a total of 12,270 patients that were in our study [1]-[32]. This is the largest study to date in the literature addressing diagnosis of COVID 19. Fever, cough and fatigue, in that respective order were the most common clinical symptoms. Laboratory findings consisted of leukopenia, elevated erythrocyte sedimentation (ESR) and elevated C-reactive protein, CRP. The gold standard test described in multiple studies was the RT-PCR. Serum assays of IgM and IgG were also drawn and found to be accurate in 93% of the time. CT Chest was both sensitive and specific, 90% and 86%. This diagnostic imaging was even more successful when coupled with clinical symptoms and approaching days 7 - 12 since the onset of clinical symptoms. Discussion: This is the largest study compiled to address diagnostic testing in COVID 19 patients. The patient population is spread vastly around the world, with access to many reported tests limi

关键词： COVID 19 Diagnostic Test RT-PCR IgM-IgG Chest CT Pandemic

Analysis of cerium substitution in Co-Sr based spinel ferrites for high frequency application

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Journal of Rare Earths 2024年第9期42卷 1755-1763,I0005页

作者： Laura Khudaysh Inas A.Ahmed Syeda Rabia Ejaz Sajjad Ahmad Khan Yasir A.Haleem Mohamed M.Ibrahim mahmood ali Hafiz Muhammad Tahir Farid Zeinhom M.El-Bahy Department of Physics Faculty of ScienceJazan UniversityJazan45142Saudi Arabia Department of Chemistry Faculty of ScienceKing Khalid UniversityAbha62224Saudi Arabia Department of Physics The Government Sadiq College Women UniversityBahawalpur63100Pakistan Institute of Physics Khwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan64200Pakistan Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Centre of Excellence in Solid State Physics University of the PunjabLahorePakistan Department of Physics Government CollegeTaunsa Sharif32200Pakistan Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City11884CairoEgypt

Spinel ferrites exhibit exceptional magnetic properties,making them a distinctive class of magnetic *** sol-gel technique was utilized for the synthesis of spinel ferrites with the chemical formula Co_(0.6)Sr_(0.4)Ce_(x)Fe_(2-x)O_(4). Following that,a comprehensive X-ray diffraction analysis unveiled the crystalline cubic structure of the synthesized *** the utilization of the M-H loop approach,the ferromagnetic attributes of ferrites were assessed,and the assimilation of rare earth elements led to substantial enhancements in saturation magnetization,remanence,and *** ferrites with a high concentration of rare earth elements have improved direct current resistivity and activation *** logarithm of a material's resistance increased from 5.29 to 8.12 Ω·cm as cerium is *** a change in the amount of cerium,the activation energy goes up from 0.19 to *** changing the frequency from 5.5 to 9.5 GHz,the dielectric characteristics were *** the frequency goes up,the dielectric constant goes *** ferrites that have been made better in every way can be used in high-frequency applications.

关键词： Activation energy DC electrical resistance Remanence magnetization Cobalt strontium spinel ferrites High frequency application Rare earths

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线驱软体手术机器人形状感知及控制

线驱软体手术机器人形状感知及控制

作者： Muhammad ali mahmood 上海交通大学

学位级别：硕士

长久以来,机器人的应用范围主要集中在工厂的装配生产线中。现如今,机器人在其他方面也融入了人们的生活。人类拥有五感,即:触觉、视觉、听觉、味觉和嗅觉。如果缺少这五感中的任何一种感觉,人类将无法与其周围环境进行完整的互动。使... 详细信息

长久以来,机器人的应用范围主要集中在工厂的装配生产线中。现如今,机器人在其他方面也融入了人们的生活。人类拥有五感,即:触觉、视觉、听觉、味觉和嗅觉。如果缺少这五感中的任何一种感觉,人类将无法与其周围环境进行完整的互动。使用这些感觉可以更好地对机器人进行操作。考虑加入触觉的情况:现今存在许多使用不同原理制成的力反馈传感器和传感阵列,但其中大多数的传感器的缺点在于其不能内应用至强磁场的环境下,或其仅可测量时变的力。本文提出了一种可应用于强磁场环境下的触觉系统的设计和实现。硬件部分包括三部分:光源、触觉传感阵列探头、可探测光强的相机。触觉传感阵列探头的实验室原型由ABS材质制作而成,其功能为转换加至光源上的力。使用光纤将光信号从光源传输至探头,并将反射光信号自探头传输至相机。探头具有14个传感单元,每个单元的直径为3.9毫米。每个传感单元都具有独立的灵活结构,这种结构可以消除相邻单元之间的干扰。每个传感单元都将施加的力转换成光信号。这些光信号由安装在光纤另一端的相机进行捕捉。在由相机捕捉后,使用图像处理技术对光强图进行处理,并提取出施加的力的信息。所述图像处理技术在MATLAB中实现,并使用线性回归计算施加的力与光强图之间的关系。探头由商用触觉传感器ZNBHM进行校正。在校正探头后,将其动态响应与商用传感器进行对比。除此之外,使用探头检测光滑圆柱物体的形状。实验结果表明本文所提出的传感器可以准确地测量施加的力。每一个传感单元都可以测量0-5N之间的力。另外,本文所提出的传感系统的造价低廉、轻便且不易腐蚀生锈,适用于条件恶劣的环境。

关键词：探头触觉传感阵列串扰光纤核磁环境兼容性

A Single Doppler Shift of Laser Doppler for Measured Average Velocity

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材料科学与工程（中英文B版） 2013年第4期3卷 256-261页

作者： Adnan Salih ali shukur mahmood Mariam Mohammed Abud Department of Physics Collage of Seeinc for Women University of Baghdad Baghdad Iraq Laser of Higher Education University of Baghdad Baghdad Baghdad Iraq Department of Physics Collage of Education University of Musstinserya Baghdad Iraq

Transanal Endoscopic Video Assisted Rectal Lesion Resection, New Techniques Addressing Neoplasms

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Surgical Science 2012年第6期3卷 307-309页

作者： ali mahmood Javier Nieto Madhu Ragupathi Prianka Gajula Colorectal Surgical Associates Sugar Land USA Division of Minimally Invasive Surgery Department of Surgery University of Texas at Houston Medical School Houston USA

Early rectal cancer beyond the reach of conventional instruments has resulted in major abdominal and pelvic operations. As visualization is compromised beyond 6 - 8 cm, proximal to the anal verge, there have been several innovations and techniques to address T1 or T2 rectal cancer in the mid to upper rectum. Transanal Endscopic Microsurgery (TEM) was a technique that had garnered some success, however with expensive instrumentation along with limitations in instrument mobility, this technology was not applicable to many patients. Transanal Endoscopic Video Assisted (TEVA) rectal resection offers a cheap and readily accessible media to address early rectal cancer. Any hospital with standard laparoscopic ability is capable to offer TEVA rectal resection. We do advocate appropriate patient selection and advise that there is a learning curve with the increased requirement for technical difficulty. Once mastered, however, this surgical approach does provide yet another tool in the armamentarium of the surgeon.

关键词： Rectal Cancer Minimally Invasive Surgery Endoscopic Surgery