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Evaluation of “C” Values to Head Loss and Water Pressure Due to Pipe Aging: Case Study of Uni-Central Sarawak

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Journal of Water Resource and Protection 2020年第12期12卷 1077-1088页

作者： King Kuok Kuok Po Chan Chiu danny Chee Ming Ting Faculty of Engineering Computing and Science Swinburne University of Technology Sarawak Campus Kuching Sarawak Malaysia Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Kota Samarahan Sarawak Malaysia

Samarahan has transformed from a small village into education hub for the past 2 decades. Rapid development and population growth had led to speedy growth in water demand. The situation is getting worse as the pipes are deteriorating due to pipe aging. Therefore, there is a need to study the adequacy of water supply and relationships among roughness coefficient (C) values in Hazen Williams’ Equation with head loss and water pressure due to pipe aging at Uni-Central, a residential area located at Samarahan Sarawak. Investigations were carried out with Ductile Iron, Abestos Cement and Cast Iron pipes at age categories of 0 - 10 years, 10 - 30 years, 30 - 50 years, 50 - 70 years and >70 years. Six critical nodes named as A, B, C, D, E and F were identified to study the water pressure and head loss. Model was developed with InfoWorks Water Supply (WS) Pro software. The impact of pipe aging and materials to water pressure and head loss was not significant at Nodes A, B, C and F. However, max water pressure at Nodes D and F were only reaching 6.30 m and 7.30 m, respectively for all investigations. Therefore, some improvement works are required. Results also show that Asbestos Cement pipe has the least impact on the head loss and water pressure, followed by Ductile Iron pipe and lastly Cast Iron pipe. Simulation results also revealed that older pipes have higher roughness coefficients, indicated with lower “C” values, thus increase the head loss and reduce the water pressure. In contrast, as “C” values increased, head loss will be reduced and water pressure will be increased.

关键词： InfoWorks Water Supply (WS) Pro Pressure Head Hazen-Williams Equation Head Loss

High-throughput calculations of charged point defect properties with semi-local density functional theory— performance benchmarks for materials screening applications

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npj Computational Materials 2023年第1期9卷 1628-1639页

作者： danny Broberg Kyle Bystrom Shivani Srivastava Diana Dahliah Benjamin A.D.Williamson Leigh Weston David O.Scanlon Gian-Marco Rignanese Shyam Dwaraknath Joel Varley Kristin A.Persson Mark Asta Geoffroy Hautier Materials Sciences Division Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Physics An-Najah National UniversityNablusPalestine Institute of Condensed Matter and Nanosciences UniversitéCatholique de LouvainChemin desÉtoiles 8B-1348 Louvain-la-NeuveBelgium Department of Materials Science and Engineering NTNU Norwegian University of Science and TechnologyTrondheimNorway Energy Technologies Area Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Department of Chemistry University College London20 Gordon StreetLondon WC1H 0AJUK Thomas Young Centre University College LondonGower StreetLondon WC1E 6BTUK Diamond Light Source Ltd. Diamond HouseHarwell Science and Innovation CampusDidcotOxfordshire OX110DEUK Lawrence Livermore National Laboratory LivermoreCA 94550USA Molecular Foundry Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Thayer School of Engineering Dartmouth CollegeHanoverNH 03755USA

Calculations of point defect energetics with Density Functional Theory(DFT)can provide valuable insight into several optoelectronic,thermodynamic,and kinetic *** calculations commonly use methods ranging from semi-local functionals with a-posteriori corrections to more computationally intensive hybrid functional *** applications of DFT-based high-throughput computation for data-driven materials discovery,point defect properties are of interest,yet are currently excluded from available materials *** work presents a benchmark analysis of automated,semi-local point defect calculations with a-posteriori corrections,compared to 245“gold standard”hybrid calculations previously *** consider three different a-posteriori correction sets implemented in an automated workflow,and evaluate the qualitative and quantitative differences among four different categories of defect information:thermodynamic transition levels,formation energies,Fermi levels,and dopability *** highlight qualitative information that can be extracted from high-throughput calculations based on semi-local DFT methods,while also demonstrating the limits of quantitative accuracy.

关键词： properties defect correction

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大学英语视听说教程 4 学生用书 1

On M-Asymmetric Irresolute Multifunctions in Bitopological Spaces

丛书名：北京大学-ESEC美国美中教育服务机构合作项目。;大学英语立体化网络化系列教材

2006年

作者： DR.danny YU总刘红中

为全面培养我国大学生英语实际应用能力，提升英语听说能力，在新世纪初，国家教育部和全国高校外语教学指导委员会制定颁布了最新的《大学英语课程教学要求》（试行），为大学英语教学明确了前进的方向。与此同时，对新的大学英语教... 详细信息

ISBN: (数字)7301082924

ISBN: (纸本)7301082924

为全面培养我国大学生英语实际应用能力，提升英语听说能力，在新世纪初，国家教育部和全国高校外语教学指导委员会制定颁布了最新的《大学英语课程教学要求》（试行），为大学英语教学明确了前进的方向。与此同时，对新的大学英语教材的需求也就与日俱增。在这新形式的鼓舞下，北京大学出版社和北大英语系大学英语教研室共同组织、策划了《大学英语视听说教程》，在北京大学教务部、北京大学外国语学院的支持下，该教程有幸得到了与北京大学有25年教学合作历史的ESEC （Education%Services%Exchange%with%China 美国美中教育服务机构）的加盟，并获得北京大学教材建设委员会的重点立项。北京大学大学英语教研室与ESEC众多语言学专家、英语教学专家通力合作，精心设计，反复琢磨，拟定大纲，编写样课。

关键词：听说教学英语教材高等学校

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Advances in Pure Mathematics 2022年第8期12卷 490-504页

作者： Levy K. Matindih Peter J. Banda danny Mukonda Department of Mathematics and Statistics Mulungushi University Kabwe Zambia Department of Mathematics and Statistics Rusangu University Monze Zambia

In this paper, our focus is to introduce and investigate a class of mappings called M-asymmetric irresolute multifunctions defined between bitopological structural sets satisfying certain minimal properties. M-asymmetric irresolute multifunctions are point-to-set mappings defined using M-asymmetric semiopen and semiclosed sets. Some relations between M-asymmetric semicontinuous multifunctions and M-asymmetric irresolute multifunctions are established. This notion of M-asymmetric irresolute multifunctions is analog to that of irresolute multifunctions in the general topological space and, upper and lower M-asymmetric irresolute multifunctions in minimal bitopological spaces, but mathematically behaves differently.

关键词： Asymmetric-Semiopen Sets m-Space m-Asymmetric Semiopen Sets Irresolute Multifunctions Upper (Lower) M-Asymmetric Irresolute Multifunctions M-Asymmetric Irresolute Multifunctions

Small bowel capsule endoscopy:Where are we after almost 15 years of use?

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World Journal of Gastrointestinal Endoscopy 2015年第1期7卷 13-36页

作者： Cedric Van de Bruaene danny De Looze Pieter Hindryckx Department of Gastro-enterology University Hospital Ghent9000 GhentBelgium

The development of capsule endoscopy(CE) in 2001 has given gastroenterologists the opportunity to investigate the small bowel in a non-invasive way. CE is most commonly performed for obscure gastrointestinal bleeding, but other indications include diagnosis or follow-up of Crohn's disease, suspicion of a small bowel tumor, diagnosis and surveillance of hereditary polyposis syndromes, Nonsteroidal anti-inflammatory drug-induced small bowel lesions and celiac *** fifteen years have passed since the release of the small bowel capsule. The purpose of this review is to offer the reader a brief but complete overview on small bowel CE anno 2014, including the technical and procedural aspects, the possible complications and the most important indications. We will end with some future perspectives of CE.

关键词： Capsule endoscopy Small bowel Preparation Procedure Technology Complications Features Enhancements Indications Future

Detection and Agreement Rates of High Risk HPV in Residual ASCUS or SIL ThinPrep and SurePath L-Pap Samples by AMPLICOR and LINEAR ARRAY Genotyping

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Detection and Agreement Rates of High Risk HPV in Residual A...

24th International Papillomavirus Conference and Clinical Workshop

作者： Max Chernesky danny Jang Eder Portillo St Joseph’s Healthcare/McMaster University St Joseph’s Healthcare/McMaster University St Joseph’s Healthcare/McMaster University

＜正＞Objectives:To determine agreement of the Roche AMPLICOR HPV [AMP-HPV] and LINEAR ARRAY [LA] HPV DNA genotyping test for high risk [HR] HPV types in AMP-HPV Liquid-based [L-Pap] SurePath（TriPath）and ThinPrep [C...

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腹腔镜网片骶骨阴道固定术治疗阴道穹隆脱垂

中华妇产科杂志 2012年第2期47卷 154-157页

作者：曾俐琴 Chou danny Wong Felix 罗喜平广东省妇幼保健院妇科广州510010 澳大利亚新南威尔士大学圣乔治医院妇科腔镜中心澳大利亚新南威尔士大学利物浦医院妇产科

近几十年来,因各种疾病行子宫全切除术的病例增多,对术后阴道穹隆脱垂（vaginal vault prolapse,VVP）的治疗也日益受到重视.目前,仍无一种公认的方法能完美有效地治愈VVP,近年来临床医师对传统手术方法进行了不断的更新,认为经腹骶骨... 详细信息

近几十年来,因各种疾病行子宫全切除术的病例增多,对术后阴道穹隆脱垂（vaginal vault prolapse,VVP）的治疗也日益受到重视.目前,仍无一种公认的方法能完美有效地治愈VVP,近年来临床医师对传统手术方法进行了不断的更新,认为经腹骶骨阴道固定术（ abdominal sacrocolpopexy,ASC）是现今治疗VVP的标准术式[1-2].ASC是利用网片将脱垂的阴道高位悬吊固定于骶骨韧带,以恢复盆腔正常解剖和阴道轴向,维持阴道深度[3],治疗有效率为74％～98％[4-5],但其创伤大、恢复慢.近年来,有学者开展了腹腔镜骶骨阴道固定术（laparoscopic sacrocolpopexy,LSC）,效果与ASC相近,并且微创,无论是对性生活活跃的年轻妇女,或是老年女性,LSC均已成为治疗VVP的最佳术式[6-8].

关键词：骶骨阴道固定术阴道穹隆脱垂固定术治疗腹腔镜网片子宫全切除术标准术式治疗有效率

Mechanical alloying and subsequent heat treatment of Ag-Zn powders

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Transactions of Nonferrous Metals Society of China 2013年第7期23卷 2071-2078页

作者： danny GUZMN Oscar RIVERA Claudio AGUILAR Stella ORDOEZ Carola MARTíNEZ Daniel SERAFINI Paula ROJAS Department of Metallurgy Atacama University and CRIDESAT485 Copayapu AvenueCopiapóChile Department of Metallurgy Atacama University485 Copayapu AvenueCopiapóChile Department of Metallurgical and Materials Engineering Federico Santa María Technical University1680 Espaa AvenueValparaísoChile Department of Metallurgical Engineering Santiago of Chile University3363 Bernardo O'Higgins AvenueSantiagoChile Department of Physics Santiago of Chile University3363 Bernardo O'Higgins AvenueSantiagoChile School of Mechanical Engineering Pontifical Catholic University of Valparaíso01567 Los Carreras AvenueQuilpuéChile

Microstructural evolution during mechanical alloying of Ag and Zn, and subsequent heat treatments were investigated. The mechanical alloying was carried out in a SPEX 8000D miller. The microstructural characterization was obtained by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM）. The thermal behavior was studied using differential scanning calorimetry （DSC）. Based on the results obtained, it can be concluded that at the early stages of milling was possible to detect the ε, β, β′, α solid solutions and remaining Zn. Later, the ε, β, β′ and Zn phases disappeared while the Zn concentration of the α solid solution was strongly increased. After 7.2 ks of milling, the mechanical alloying process reached a steady state. During this period, both the composition and crystallite size of the α solid solution remained practically unchanged. On the other hand, subsequent heat treatments of milled powders showed that the α solid solution could also be obtained by the combination of mechanical alloying and heat treatment. Finally, the evolution of the microstructure during milling and annealing was combined to propose an optimal processing route in order to obtain a α solid solution.

关键词： mechanical alloying Zn-Ag alloys phase transformation heat treatment

Multi-Stage Pedestrian Crossings and Two-Stage Bicycle Turns: Delay Estimation and Signal Timing Techniques for Limiting Pedestrian and Bicycle Delay

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Journal of Transportation Technologies 2019年第4期9卷 489-503页

作者： Peter G. Furth Yue (danny) Wang Michael A. Santos Northeastern University Boston MA USA

Signalized intersections sometimes involve multistage pedestrian crossings, in which pedestrians cross to one or more islands and then wait there for a signal to continue. When signals are timed without attention to pedestrian progression, pedestrian delay at multistage crossings can be very long. This paper addresses two issues. First, pedestrian delay at multistage crossings is rarely evaluated because there are no tools in the industry for that purpose except microsimulation. We present a numerical method for determining crossing delay with any number of stages and with the possibility of multiple WALK intervals per cycle. The same method can be applied to single stage crossings, to diagonal two-stage crossings where pedestrians may have path choice, and bicycle two-stage turns. This method has been implemented in a freely available online tool. Second, we describe several signal timing techniques for improving pedestrian and bicyclist progression, and thus reducing their delay, through multistage crossings. They include reservice for selected crossing phases, left turn overlaps, having pedestrian phases overlap each other, and bidirectional bicycle crossings which create path options for two-stage turns. Examples show the potential for large reductions in pedestrian delay, often with little or no increase in vehicular delay. In one example, the addition of a short pedestrian overlap phase reduced average pedestrian delay at a 3-stage crossing by 82 s while average vehicular delay increased by only 0.5 s.

关键词： Pedestrian Delay Traffic Signal Control Multistage Crossings