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Investigation of heat transfer of a building wall in the presence of phase change material(PCM)

能源与人工环境(英文) 2020年第2期1卷 199-206页

作者： rafid jahangir khan Md.Zubayer Hossain Bhuiyan Dewan Hasan Ahmed Department of Mechanical and Production Engineering Ahsanullah University of Science and Technology141-142 Love RoadTejgaon Industrial AreaDhakaBangladesh

The energy consumption in buildings for heating,ventilation,and air-conditioning is increasing with the in-creasing demand for thermal *** energy storage with phase change material(PCM)has attracted growing attention for its role in achieving energy conservation in buildings with thermal *** paper investigates the effect of PCM on the heat transfer rate in a building wall and the role of PCM on the indoor thermal comfort of the *** models of building wall fragments were developed for the experimental *** one model,tests were conducted for different positions of the PCM layer in the building wall to identify the optimal position of the PCM layer inside the *** another model,tests were carried out integrating PCM,air gap,and other conventional building materials(brickbat and sand),one at a time,to investigate the role of PCM on the heat transfer rate in the building wall *** results show that placing the PCM layer closer to the heat source gives a low-temperature gain of the cold water bath(indoor state)as compared with the PCM layer near the heat *** PCM,the temperature rise of the cold water bath(indoor state)of the building wall fragment was the lowest,and the slope of the temperature rise of the cold water bath becomes steadier with time i.e.,fewer temperature *** was a significant time delay for the cold water bath to reach a given *** heat required for a unit degree increase in the temperature of the cold water bath was higher and the peak heat flux of the wall was lower relative to the other building materials.

关键词： Phase change material(PCM) Thermal energy storage Building wall fragment Thermal comfort

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Seropositivity and Other Determinants Associated with Toxoplasmosis in Local Buffalo in Iraq

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Open Journal of Veterinary Medicine 2024年第1期14卷 1-9页

作者： rafid Jawad Kazem Imad Kazem Ali Department of Animal Production College of Agriculture Sumer University Al-Rifai Iraq

A cross-sectional study was conducted to determine the Seropositivity of Toxoplasma gondii in water buffalo in three Iraqi governorates (Baghdad, Dhi Qar, and Maysan) and to estimate the risk aspects related to infestation throughout the period from January to December 2019. A total of 430 serum samples were inspected with a commercial ELISA (Enzyme linked immunosorbent assay) kit. Indirect multi-species kit. The overall Seropositivity of T. gondii in the examined local buffalo was 7.4%, and the highest rate (9.3%) was in Baghdad Governorate. A multivariate regression analysis revealed that adult buffalo (OR = 7.10;95% CI: 0.87-57.68;P = 0.067) and young herds (OR = 8.42;95% CI: 1.07-66.02;P = 0.043) were more subject to infestation from young buffalo and large herds. Furthermore, the hazard of toxoplasmosis was increased in winter especially among animals in contact with cats. It is therefore requisite to determine risk aspects to evaluate which mitigation, control, prevention and procedures should be carried out to diminish, control and prevent infestation with T. gondii and its propagation.

关键词： Toxoplasmosis Buffalo Local Seropositivity Iraq

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Using Raman shift and FT-IR spectra as quality indices of oil bit PDC cutters

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Petroleum 2019年第3期5卷 329-334页

作者： rafid KAbbas Kanaan Mohammad Musa Chemical Engineering Dept. Faculty of EngineeringUniversity of Al-QadisiyahAl-Diwaniya City58002Iraq

Nowadays many of oil and gas wells are drilled extensively by Polycrystalline Diamond Compact(PDC)drill *** companies are manufacturing PDC cutters according to their *** of these companies concentrate their products of PDC cutters to be well resisting for abrasive *** wear of PDC inserts leads to money loss as well as delays the drilling procedures causing unexpected ***,it is crucially significant to evaluate the quality of the PDC cutters based on their resistance against abrasive *** present work concentrates on assessing the PDC cutters from various sources using two non-destructive analytical approaches:Raman-Shift and Fourier Transformation Infrared Ray(FT-IR)*** analysis of the PDC samples with the analytical techniques were validated with the previous experimental results obtained from micro and nano-scratch tests achieved on the same *** presented work could be performed on many PDC cutters from various manufacturers as the applied tests considered non-destructive compared to the traditional destructive techniques which leads the way for evaluating lots of PDC cutters without causing any *** analysis of the applied analytical approaches agreed with the results obtained from previous experimental scratch tests.

关键词： Raman-shift FT-IR Polycrystalline diamond compact(PDC) Drill bit wear

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Climate Change Impacts on the Extreme Rainfall for Selected Sites in North Western England

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Open Journal of Modern Hydrology 2012年第3期2卷 49-58页

作者： Mawada Abdellatif William Atherton rafid Alkhaddar School of the Built Environment Liverpool John Moores University Liverpool UK

Impact and adaptation assessments of climate change often require more detailed information of future extreme rainfall events at higher resolution in space and/or time, which is usually, projected using the Global Climate Model (GCM) for different emissions of greenhouse concentration. In this paper, future rainfall in the North West region of England has been generated from the outputs of the HadCM3 Global Climate Model through downscaling , employing a hybrid Generalised Linear Model (GLM) together with an Artificial Neural Network (ANN). Using two emission scenarios (A1FI and B1), the hybrid downscaling model was proven to have the capability to successfully simulate future rainfall. A combined peaks-over-threshold (POT)-Generalised Pareto Distribution approach was then used to model the extreme rainfall and then assess changes to seasonal trends over the region at a daily scale until the end of the 21st century. In general, extreme rainfall is predicted to be more frequent in winter seasons for both high (A1FI) and low (B1) scenarios, however for summer seasons, the region is predicted to experience some increase in extreme rainfall under the high scenario and a drop under the low scenario. The variation in intensity of extreme rainfall was found to be based on location,season, future period, return period as well as the emission scenario used.

关键词： Artificial Neural Network Climate Change Downscaling Extremes Frequency Analysis Generalised Linear Model Generalised Pareto Distribution

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Comprehensive review into the challenges of gastrointestinal tumors in the Gulf and Levant countries

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World Journal of Clinical Cases 2020年第3期8卷 487-503页

作者： Rare Tumors GI Group Fadi Farhat Abdulaziz Al Farsi Ahmed Mohieldin Bassim Al Bahrani Eman Sbaity Hassan Jaffar Joseph Kattan Kakil Rasul Khairallah Saad Tarek Assi Waleed El Morsi rafid A Abood 不详 Hammoud Hospital UMC Saida PO Box 652Lebanon Medical Oncology Department Royal HospitalMuscat PO Box 1331Oman Medical Oncology Department Kuwait Cancer Control CenterKuwait PO Box 42262Kuwait Division of General Surgery American University of BeirutBeirut 11072180Lebanon Oncology Department Tawam HospitalAl Ain PO Box 15258United Arab Emirates Hemato-oncology Department Hotel Dieu de FranceBeirutLebanon Hemato-oncology Department National Center for Cancer Care and ResearchDohaQatar Pathology Department Institute National de PathologicBeirutLebanon Oncology Department Faculty of MedicineSaint-Joseph UniversityBeirutLebanon Pfizer Oncology-Emerging Markets Dubai Media CityDubaiUnited Arab Emirates Oncology Department Basra College of MedicineBasraIraq

Although gastrointestinal stromal tumors(GISTs)are rare,with an incidence of 1/100000 per year,they are the most common sarcomas in the peritoneal *** considerable progress in the diagnosis and treatment of GIST,about half of all patients are estimated to experience *** only two drugs,sunitinib and regorafenib,approved by the Food and Drug Administration,selecting treatment options after imatinib failure and coordinating multidisciplinary care remain *** addition,physicians across the Middle East face some additional and unique challenges such as lack of published local data from clinical trials,national disease registries and regional scientific research,limited access to treatment,lack of standardization of care,and limited access to mutational *** global guidelines set a framework for the management of GIST,there are no standard local guidelines to guide clinical practice in a resource-limited ***,a group of 11 experienced medical oncologists from across the Gulf and Levant region,part of the Rare Tumors Gastrointestinal Group,met over a period of one year to conduct a narrative review of the management of GIST and to describe regional challenges and gaps in patient management as an essential step to proposing local clinical practice recommendations.

关键词： Gastrointestinal stromal tumors Diagnosis Disease management Treatment Challenges Middle East

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音乐集市

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现代装饰 2022年第2期 146-151页

作者： Amelia Borg Nick Braun Jane Caught Qianyi Lim Timothy Moore rafid Hai John Tanner Lauren Crockett Peter Bennetts(摄影) 郭映琴(译) 不详

本案位于澳大利亚墨尔本,集工作、学习、表演、合作于一体,是澳大利亚当代音乐的新型文化社交空间。为了促进音乐与商业的融合,本中心汇聚了多家澳大利亚顶尖的音乐机构,包括:维多利亚音乐、维多利亚音乐发展办公室以及The Push音乐慈... 详细信息

本案位于澳大利亚墨尔本,集工作、学习、表演、合作于一体,是澳大利亚当代音乐的新型文化社交空间。为了促进音乐与商业的融合,本中心汇聚了多家澳大利亚顶尖的音乐机构,包括:维多利亚音乐、维多利亚音乐发展办公室以及The Push音乐慈善机构,同时也容纳了一系列共享办公、教育以及表演空间。项目坐落于科林伍德院新区的两栋19世纪学校建筑内,是音乐与创业的结合体。落成后的项目与周边的建筑、附近的住户以及号称“墨尔本岩石之家”的Tote酒店形成了良好的互动关系,有效地鼓励了当地社区创意型产业的融合。室内涵盖了多种功能空间,包括作曲室、教育空间、走廊、会议室以及社交空间,其能够为不同类型的活动及表演提供场所,接纳人们随时迸发的表演灵感,而可移动的墙壁与窗帘则进一步增强了空间的灵活性。多功能空间体现了空间项目与使用者的融合,大门与吧台闪烁的灯光吸引着人们。与大多数文化社交中心相同,室内的照明系统在使用和空间配置上都非常灵活:设有可移动隔断的会议空间在日程结束后可变身为激动人心的演出现场。

关键词：科林伍德演出现场功能空间空间配置照明系统澳大利亚慈善机构当代音乐

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