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SSRN 2022年

作者： Nikravesh, Y. Latypov, Marat I. Frantziskonis, G. Muralidharan, Krishna Department of Civil and Architectural Engineering and Mechanics University of Arizona TucsonAZ85721 United States Department of Materials Science and Engineering University of Arizona TucsonAZ85721 United States Graduate Interdisciplinary Program in Applied Mathematics University of Arizona TucsonAZ85721 United States Lunar and Planetary Laboratory University of Arizona TucsonAZ85721 United States

Using classical molecular dynamics, we investigate the cold-spray additive manufacturing process involving copper particles impacting a copper substrate. Specifically, we develop fundamental insights into the interplay between particle size, particle velocity and ensuing penetration depth of the particle and the effective adhesion strength that binds the impinging particle with the substrate. Equally importantly, we also establish a quantitative constitutive relationship that governs the process variables (i.e., particle size, particle velocity), the resulting particle penetration depth and impact bonding energy. By examining the formation and evolution of adiabatic shear bands and dislocation densities within the particle and the substrate, as well as by examining the structural evolution of the impinging particle as a function of process variables in conjunction with observations of material jetting, we shed light on the deformation mechanisms that govern the cold spray process, and provide a fundamental basis for understanding the presence of a critical velocity that must be overcome in order to promote strong adhesion of the particle with the substrate. Further, by developing a comprehensive constitutive relationship that relates the process variables to the resulting penetration of the particle and the extent of impact bonding, we enable the ability to upscale information derived at the nanometric scales to experimental scales. This work thus serves as a steppingstone in not only answering fundamental interrelationships that govern the cold spray process, but also in the quest for developing comprehensive integrated computational materials engineering models for optimizing the process conditions underlying the cold spray process. © 2022, The Authors. All rights reserved.

关键词： Molecular dynamics

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Green campus development of UNNES postgraduate program: potential identification and performance analysis

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IOP Conference Series: Earth and Environmental Science 2022年第1期969卷

作者： T Prihanto P Hardati E B Santoso A A Wibowo Study Program of Architectural Engineering Faculty of Engineering Universitas Negeri Semarang Indonesia Study Program of Geographical Education Faculty of Social Universitas Negeri Semarang Indonesia

Universitas Negeri Semarang (UNNES) with the vision of conservation-minded university with international reputation continues to develop a conservation-based academic life, namely the value of caring for the environment. This vision is supported by one of the internal UNNES Green Campus programs, namely H-BAT (green, clean and healthy). Based on the results of the H-BAT assessment in period of June 202, it showed that the achievement of the UNNES Postgraduate program (it's called PPs UNNES) performance was 62.24%. This performance achievement is a low indicator for PPs UNNES in its efforts to develop a green campus. The formulation of the problem that can be raised is how to improve the performance of PPs UNNES's H-BAT achievement in the field of conservation. The purpose of this study is to identify potential and analyse campus performance in accordance with the H-BAT indicator assessment criteria. The method used in this research is descriptive exploratory. The results show that the achievement of 62.24% of the H-BAT assessment illustrates that the PPs UNNES green campus governance is not optimal, both in administration, programs, policies and implementation in the field. PPs UNNES has great potential to be able to better improve H-BAT achievement, but it seems that there are obstacles that may be the cause of the low H-BAT performance achievements in the past period. It needs a lot of efforts to optimize the existing potential so that it can fulfil the H-BAT assessment indicators more optimally.

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Evaluating the Impact of Cooperative Automated Transportation on Work Zone Safety and Operation Using Weather-Sensitive Microsimulation Approach

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SSRN 2022年

作者： Das, Anik Khan, Md Nasim Ahmed, Mohamed M. Research & Implementation Program Texas A&M Transportation Institute 1111 RELLIS Parkway Room 3448 BryanTX77807-3135 United States Civil Engineering Program Ingram School of Engineering Texas State University RFM 5224 601 University Drive San MarcosTX78666 United States Department of Civil and Architectural Engineering Construction Management Transportation Center Baldwin Hall CEAS - Civil Eng - 0071 University of Cincinnati 2850 Campus Way CincinnatiOH45221-0071 United States

Work Zones (WZs) are considered a major concern for transportation agencies. The implementation of Cooperative Automated Transportation (CAT) may be faced with a variety of challenges including safer WZs navigation during adverse weather. This study investigated the impact of CAT on a freeway WZ corridor in foggy weather in terms of safety and operations via weather-based microsimulation modeling. To generate various CAT scenarios, three types of vehicles namely Human-driven Vehicles (HV), Connected Vehicles (CV), and Automated Vehicles (AV) were considered. The representative parameters of HV, CV, and AV were adjusted based on real-world data from the SHRP 2 Naturalistic Driving Study, the WYDOT CV Pilot, and CoEXist project, respectively. A basic freeway segment on Interstate 80 in Wyoming was replicated with a WZ area in VISSIM. Thirty-six individual scenarios were designed based on different combinations of CAT and six levels of Market Penetration Rates (MPRs), including 0%, 10%, 25%, 50%, 75%, and 100%, in an attempt to explore the influence of CAT on WZ operation and safety. The safety evaluation using two Surrogate Measures of Safety including Time-To-Collision and Post Encroachment Time suggested that the total number of conflicts decreased with the increase of MPRs. The operational analyses revealed that CAT scenarios produced higher average speed and lower total travel time at different MPRs compared to baseline condition with only HV. The findings could provide bases for appropriate WZ design and management from safety and operational perspectives at every stage of CAT deployment. © 2022, The Authors. All rights reserved.

关键词： Vehicles

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New Technique to Determine Initial Printable Time of 3d Printing Fiber Cement Mortar

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SSRN 2022年

作者： Sukontasukkul, Piti Maho, Buchit Khomkum, Sila Pianfuengfoo, Satharat Zhang, Hexin Yoo, Dooyeol Tangchirapat, Weerachart Sae-Long, Worathep Limkatanyu, Suchart Construction and Building Materials Research Center Department of Civil Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Civil Engineering Faculty of Engineering Rajamangala University of Technology Phra Nakhon Thailand School of Engineering and the Built Environment Edinburgh Napier University Edinburgh United Kingdom Department of Architectural Engineering Hanyang University Seongdong-gu Seoul Korea Republic of Department of Civil Engineering Faculty of Engineering King Mongkut’s University of Technology Thonburi Bangkok Thailand Civil Engineering Program School of Engineering University of Phayao Phayao Thailand Department of Civil Engineering Faculty of Engineering Prince of Songkla University Hat Yai Campus Songkla Thailand

In this study, a new technique was proposed to precisely determine the initial printable time as well as the initial width and height of printed cement mortar filament. For cement printing application, it is essential to determine the initial printable time correctly to begin the printing process with minimum or no layer deformation or strain. A conventional method requires a series of printed filaments at different time intervals to estimate the initial printable time. A more precise initial printable time can be obtained by narrowing down the time interval, but it also requires a larger number of printing filaments. The technique proposed in this study utilizes a mathematical relationship between width (or height) versus time obtained from printing a number of filaments at a given time slot and, by employing a derivative method, a more precise initial printable time corresponding to each mortar type can be determined. The obtained initial printable time can also be used in determining the expected initial width and height of each mortar type. There were two types of mortars being investigated: plain mortar and fiber reinforced mortar (FRM) with three different volume fractions. The results showed that the initial printable time obtained using the proposed technique is highly precise, as seen by the resemblance between the expected and actual initial widths. In general, the FRM yielded smaller initial printable times than plain mortar, and the initial printable time also decreased from 72.5 to 58.5 minutes with the increasing fiber content from 0 to 0.1% by volume. Using the difference between the accumulate expected and actual heights, the layer strain for each mortar was obtained. Again, FRM exhibited a smaller layer strain than plain mortar due to the support provided by the fibers. In terms of strength, the printed specimens exhibited lower compressive strength (by about 11-13%) but higher flexural strength (by about 14 -29%) than the cast specimens for both pl

关键词： Mortar

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Full-scale evaluation of reversed A^(2)/O process for removal of multiple pollutants in sewage

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Chinese Chemical Letters 2020年第10期31卷 2825-2830页

作者： Qihang Wu Haiyan Li Xiaodong Hu Yongfeng Shi Deguan Kong Yucheng Zhang Bixian Mai Dongye Zhao Jie Fu Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China School of Civil Engineering Guangzhou UniversityGuangzhou 510006China School of Civil and Architectural Engineering Guizhou University of Engineering ScienceBijie 551700China School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburnAL 36849United States School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

This study evaluated the removal of multiple pollutants,i.e.,polybrominated diphenyl ethers(PBDEs),novel halogenated flame retardants(HFRs),sulfonamide antibiotics(SAs),and heavy metals(HMs),by a fullscale reversed A^(2)/O process in a sewage treatment plant(STP)in Guangzhou,*** reversed A^(2)/O process demonstrated high removal efficiencies(REs)for total PBDEs(60.5%±4.3%),novel HFRs(98.4%±2.8%)and HMs(70.1%±1.2%),and a relatively low RE for SAs(25.0%±2.3%).BDE 209,the dominant PBDE congener,showed a high residual concentration(13.41±5.18 ng/L)in the suspended particulate matter(SPM)of treated *** me novel HFRs,dechlorane plus(DP)and decabromodiphe nyl ethane(DBDPE),were detected in the SPM of the raw sewage(7.50±4.14 ng/L and 11.52±11.65 ng/L,respectively).The removal ofSAs was mainly through biodegradation in the activated sludge bioreactors(ASBs).Ofthe HMs,Mn and Ni exhibited the lowest REs(47.5%±2.2%and 35.0%±2.6%,respectively),while Cr and Cu showed the highest removal(REs>80%).In terms of treatment units in the reversed A^(2)/O process,ASBs showed the highest RE(27.8%)for the multiple *** information can aid in our understanding of removal properties of STPs on various pollutants and evaluating the ecological/health risks of STPs as point pollutant sources.

关键词： Polybrominated diphenyl ethers Halogenated flame retardants Sulfonamide antibiotics Heavy metals Reversed A^2/O process

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Accelerating Environmental Research to Achieve Sustainable Development Goals

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ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 2023年第11期10卷 961-962页

作者： Mihelcic, James R. Barra, Ricardo O. Brooks, Bryan W. Diamond, Miriam L. Eckelman, Matthew J. Gibson, Jacqueline MacDonald Guidotti, Sunny Ikeda-Araki, Atsuko Kumar, Manish Maiga, Ynoussa McConville, Jennifer Miller, Shelly L. Pizarro, Valeria Rosario-Ortiz, Fernando Wang, Shuxiao Zimmerman, Julie B. Department of Civil & Environmental Engineering University of South Florida 4202 E Fowler Ave ENG 030 Tampa Florida 33620 United States Faculty of Environmental Sciences and EULA Chile Centre University of Concepcion Barrio Universitario s/n Concepción 4070386 Chile Department of Environmental Science Baylor University One Bear Place #97266 Waco Texas 76798-7266 United States Department of Earth Sciences and School of the Environment University of Toronto Toronto M5S 1A1 ON Canada College of Engineering Northeastern University Boston Massachusetts 02115 United States Department of Civil Construction and Environmental Engineering North Carolina State University Fitts-Woolard Hall Room 3253 915 Partners Way Raleigh North Carolina 27695-7908 United States UNICEF Latin America and Caribbean Regional Office Building 102 Alberto Tejada Street City of Knowledge 0843 Republic of Panama Faculty of Health Sciences Hokkaido University Kita 12 Nishi 5 Kitaku Sapporo 060-0812 Japan Sustainability Cluster School of Engineering University of Petroleum & Energy Studies Dehradun Uttarakhand 248007 India Escuela de Ingenieria y Ciencias Tecnologico de Monterrey Campus Monterey Monterrey 64849 Nuevo León Mexico Laboratory of Microbiology and Microbial Biotechnology UFR SVT University Joseph KI-ZERBO 03 BP 7021 Ouagadougou Burkina Faso Department of Energy and Technology Swedish University of Agricultural Sciences Box 7032 Uppsala SE-750 07 Sweden Department of Mechanical Engineering University of Colorado Boulder 427 UCB Boulder Colorado 80309-0427 United States Perry Institute for Marine Science Windsor School (Albany Campus) Frank Watson Boulevard Adelaide The Bahamas Department of Civil Environmental and Architectural Engineering Environmental Engineering Program University of Colorado Boulder Colorado 80309 United States State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084

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Desialylated Platelet Clearance in the Liver is a Novel Mechanism of Systemic Immunosuppression

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Research 2024年第3期2023卷 35-50页

作者： June Li Danielle Karakas Feng Xue Yingyu Chen Guangheng Zhu Yeni H.Yucel Sonya A.MacParland Haibo Zhang John W.Semple John Freedman Qizhen Shi Heyu Ni Department of Laboratory Medicine and Pathobiology University of TorontoTorontoONCanada Toronto Platelet Immunobiology Group TorontoONCanada Keenan Research Centre for Biomedical Science of St.Michael's Hospital TorontoONCanada Canadian Blood Services Centre for Innovation TorontoONCanada Departments of Pediatrics Medical College of WisconsinMilwaukeeWIUSA Blood Research Institute Versiti WisconsinMilwaukeeWIUSA Departments of Ophthalmology and Vision Sciences Medicine University of TorontoTorontoONCanada Faculty of Engineering and Architectural Science Ryerson UniversityTorontoONCanada Multi-Organ Transplant Program Toronto General Hospital Research InstituteTorontoONCanada Department of Immunology University of TorontoTorontoONCanada Critical Care Medicine Department ofAnesthesiology and PainUniversity of TorontoTorontoONCanada Department of Physiology University of TorontoTorontoONCanada Department of Pharmacology University of TorontoTorontoONCanada. Division of Hematology and Transfusion Medicine Lund UniversityLundSweden clinical Immunology and Transfusion Medicine Ofice of Medical ServicesRegion SkaneLundSweden Department of Medicine University of TorontoTorontoONCanada Children's Research Institute Children's WisconsinWauwatosaWIUSA Midwest Athletes Against Childhood Cancer Fund Research Center MilwaukeeWIUSA.

Platelets are small, versatile blood cells that are critical for hemostasis/thrombosis. Local platelet accumulation is a known contributor to proinflammation in various disease states. However, the anti-inflammatory/immunosuppressive potential of platelets has been poorly explored. Here, we uncovered, unexpectedly, desialylated platelets (dPLTs) down-regulated immune responses against both platelet-associated and -independent antigen challenges. Utilizing multispectral photoacoustic tomography, we tracked dPLT trafficking to gut vasculature and an exclusive Kupffer cell-mediated dPLT clearance in the liver, a process that we identified to be synergistically dependent on platelet glycoprotein Ibα and hepatic Ashwell–Morell receptor. Mechanistically, Kupffer cell clearance of dPLT potentiated a systemic immunosuppressive state with increased anti-inflammatory cytokines and circulating CD4+ regulatory T cells, abolishable by Kupffer cell depletion. Last, in a clinically relevant model of hemophilia A, presensitization with dPLT attenuated anti-factor VIII antibody production after factor VIII ( infusion. As platelet desialylation commonly occurs in daily-aged and activated platelets, these findings open new avenues toward understanding immune homeostasis and potentiate the therapeutic potential of dPLT and engineered dPLT transfusions in controlling autoimmune and alloimmune diseases.

关键词： Platelet transfusion homeostasis

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State of the art of architectural engineering education as a contribution to the foundation for the National Agenda: A snapshot of four programs

State of the art of architectural engineering education as a...

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architectural engineering National Conference 2019: Integrated Building Solutions - The National Agenda, AEI 2019

作者： Raebel, Christopher H. Hasler, Fred Erdogmus, Ece Parfitt, Kevin Architectural Engineering Program Civil and Architectural Engineering and Construction Management Dept. Milwaukee School of Engineering MilwaukeeWI United States GE Johnson Dept. of Architectural Engineering and Construction Science Kansas State Univ. ManhattanKS United States Durham School of Architectural Engineering and Construction Univ. of Nebraska OmahaNE United States Dept. of Architectural Engineering Pennsylvania State Univ. University ParkPA United States

ISBN: (数字)9780784482261

ISBN: (纸本)9780784482261

architectural engineering education is a major component of the national agenda for the American Society of Civil Engineers. Well-educated graduates of architectural engineering programs are in high demand regionally, nationally, and internationally. The degree programs offered by universities are constantly evolving to remain current with, and ahead of, leading design firms and their design practices. This paper presents a brief look at four different undergraduate architectural engineering programs. The programs from Milwaukee School of engineering, Kansas State University, University of Nebraska, and The Pennsylvania State University are presented. The programs range from a small, undergraduate focused program to a large, doctoral granting program. Each of these programs have been accredited by ABET for a long period of time, and each program has weathered changes to their undergraduate curriculum in recent years. Three focal points will be included in the comparison. First, the background of departmental faculty will be discussed. The universities considered are diverse, and the attraction, retention, and focus of the faculty differs among the programs evaluated. Next, examples of course offerings and course structure will be compared. The four universities offer very different degree program structures, and each structure presents its own advantages and difficulties. Finally, each program's senior capstone experience will be discussed and compared. The senior capstone experience is often a major component of an AE degree program, and it is also often a primary source for assessment of student outcomes. The capstone experience is a venue for showcasing students' educational maturity and professional readiness. Each university approaches the capstone experience in a different way, and both similarities and differences will be discussed. © 2019 American Society of Civil Engineers.

关键词： engineering education

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Batik Pemalang Organic Wastewater Composition and Simple Electrocoagulation-Filtration Treatment 1

Batik Pemalang Organic Wastewater Composition and Simple Ele...

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1st International Conference on Environment, Sustainability Issues and Community Development, INCRID 2019

作者： Pratiwi, N.I. Sari, S.R. Arifan, F. Wulandari, A.T. Alkian, I. Mustasjar, B. Aji, M.B.F.B. Department of Physics Faculty of Science and Mathematics Diponegoro University Indonesia Department of Engineering Architectural Engineering Diponegoro University Indonesia Department of Industrial Chemical Engineering Technology Vocational School Diponegoro University Indonesia Nursing Science Study Program Faculty of Health Sciences Muhammadiyah University Purwokerto Indonesia Department of History Faculty of Humanities Diponegoro University Indonesia

Wastewater produced by batik industry in Cibelok Village, Pemalang that is disposed straight into the sewage will increase the concentration of Biochemical Oxygen Demand (BOD), ammonia (NH3), Chemical Oxygen Demand (COD), chromium (Cr), lead (Pb), watercolour, acidity (pH), and dissolved oxygen (DO). Disposed batik wastewater without treatment will contaminate the environment, mainly its water and soil. The main purpose of this research is to reduce the concentration of Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), ammonia (NH3), chromium (Cr), lead (Pb), watercolour, acidity, and dissolved oxygen (DO) by treating batik Cibelok's waste and not contaminate the surrounding environment. Laboratory test results on batik waste in COD, BOD, DO, ammonia, chromium, lead, colour, and acidity (pH). These results are not in accordance with the 2014 Waste Water Quality Standard Number 5 by the Regulation of the Minister of Environment of the Republic of Indonesia. Alternatives that have been done to treat Cibelok Village's batik waste is to lower dangerous substances concentration through electrocoagulation and filtration. The processes could lower COD level around 57.6%, ammonia 98%, chromium 85%, and BOD 67%. Reducing the concentration of the substance makes the batik waste safer and environmentally friendly when it's finally disposed to the sewage. © 2020 IOP Publishing Ltd.

关键词： Biochemical oxygen demand

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Evaluation of the lighting system in drawing studio at the E12 building, Faculty of engineering UNNES

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IOP Conference Series: Earth and Environmental Science 2021年第1期700卷

作者： M F Setiawan Architectural Engineering Study Program Faculty of Engineering Semarang State University (UNNES) Indonesia

A room can be said to be a good one if the lighting following the requirements of needs depends on the function of the room. The room studied in this study was a drawing studio room in E12 Building, Faculty of engineering UNNES. This room has a condition where the spread of light entering from the window is uneven so during the day the lights must always be turned on. The purpose of this study is to measure and evaluate the lighting intensity of the drawing studio space. This research was conducted using descriptive and evaluative methods. The data obtained is sourced from the results of direct light intensity measurements on the object of research conducted in the morning, afternoon, and evening for three days using a lux meter and measurements made referring to SNI 16-7062-2004 about measuring the intensity of lighting at work. The results of the measurement of lighting intensity in the image studio room will be compared with the SNI recommended standards. According to SNI 03-6575-2001, the standard requirement for a lux studio drawing space is 750 lux. The result, both when the lamp is turned on and the lamp turns off the measurement results do not meet the standards. It is recommended to increase the intensity of artificial lighting (lights) in the drawing studio until it meets the SNI 750 lux standard. From the results of calculations with the lumen method, it is recommended to replace each lamp with a lamp that has a light current of 9360 lumens.

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