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Proceedings of the 4th International Conference on Sustainability in Civil engineering - ICSCE 2022

作者： Aung, Thu Zar Nguyen, Lan Chau Nguyen, Tien Dung Infrastructure Engineering Program VNU Vietnam Japan University Hanoi Viet Nam University of Transportation and Communications UTC Hanoi Viet Nam

ISBN: (纸本)9789819923441

Landslide hazards are geological disasters caused by heavy rainfall and debris flow, mainly occurring in mountainous regions. This paper presents remedy solutions for a deep-seated landslide on Road No. 155, section Km 12 + 667.85–Km 12 + 711.57, near a new Mong Sen bridge in Sapa town, Lao Cai province. In October 2020, two deep-seated landslides occurred in this area with some serious cracks. The landslide area was divided into two zones: zones 1 and 2, and up to date, these two zones have still been under reinforcement. While these two zones were reinforced with the retaining structure, soil nails, and grounded anchor system, a landslide (named Zone 3) happened in the area between Zones 1 and 2, where soil erosion and water erosion appeared serious because of heavy rainfall and cutting slopes. In this study, geological investigations, laboratory tests, topographical features, hydrological features, and stability analysis (Geo-Slope/W software) were studied and analyzed to understand the failure mechanism. Then, mitigation solutions such as the retaining wall with the ground anchors, drainage pipe, and soil nails were proposed for the reinforcement. The analysis results showed that the sliding surface of the entire landslide body and the behavior of the new cut slope, with and without reinforcement structures, were based on the numerical analysis by Geo-Slope/W software. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Landslides

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Rockfall Mitigation for Highway in Vietnam: A Case Study on the Hoang Sa Road, Da Nang City 4th

Rockfall Mitigation for Highway in Vietnam: A Case Study on ...

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Proceedings of the 4th International Conference on Sustainability in Civil engineering - ICSCE 2022

作者： Naing, Cho Thu Thu Nguyen, Lan Chau Nguyen, Tien Dung Infrastructure Engineering Program VNU Vietnam Japan University Hanoi Viet Nam University of Transportation and Communications/UTC Hanoi Viet Nam

ISBN: (纸本)9789819923441

This paper presents a study on mitigating the impacts of rockfall on the Hoang Sa road, a coastal route to Son Tra peninsula, Da Nang city. Son Tra peninsula is very well-known for tourist attraction places. The Hoang Sa road is located in mountainous terrain. Rockfall events had occurred along this highway several times in the past. As a result, it affected the tourism sector and damaged the road infrastructure in Da Nang city. In this study, UAV was used to investigate the rockfall-prone area. According to the field survey, there were many large tectonic fractures and unstable blocks on the rock cliff along the Hoang Sa road. This paper focused on the mechanism of rockfall in a high-risk rockfall area on the Hoang Sa road and determined a suitable barrier location and height using parameters such as run-out distance, bounce height, velocity, and kinetic energy of the falling rock blocks with the RocFall software. The numerical analysis indicated that the appropriate barrier location and height for this area were at 14.5 and 5 m, with a kinetic energy of 590 kJ. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Slope stability

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Evaluating the Robustness of MDSS Maintenance Forecasts Using Connected Vehicle Data

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Journal of transportation Technologies 2024年第4期14卷 549-569页

作者： Gregory L. Brinster Jairaj Desai Myles W. Overall Christopher Gartner Rahul Suryakant Sakhare Jijo K. Mathew Nick Evans Darcy Bullock Joint Transportation Research Program College of Engineering Lyles School of Civil and Construction Engineering Purdue University West Lafayette IN USA Indiana Department of Transportation Indianapolis IN USA

The Indiana Department of transportation (INDOT) adopted the Maintenance Decision Support System (MDSS) for user-defined plowing segments in the winter of 2008-2009. Since then, many new data sources, including connected vehicle data, enhanced weather data, and fleet telematics, have been integrated into INDOT winter operations activities. The objective of this study was to use these new data sources to conduct a systematic evaluation of the robustness of the MDSS forecasts. During the 2023-2024 winter season, 26 unique MDSS forecast data attributes were collected at 0, 1, 3, 6, 12 and 23-hour intervals from the observed storm time for 6 roadway segments during 13 individual storms. In total, over 888,000 MDSS data points were archived for this evaluation. This study developed novel visualizations to compare MDSS forecasts to multiple other independent data sources, including connected vehicle data, National Oceanic and Atmospheric Administration (NOAA) weather data, road friction data and snowplow telematics. Three Indiana storms, with varying characteristics and severity, were analyzed in detailed case studies. Those storms occurred on January 6th, 2024, January 13th, 2024 and February 16th, 2024. Incorporating these visualizations into winter weather after-action reports increases the robustness of post-storm performance analysis and allows road weather stakeholders to better understand the capabilities of MDSS. The results of this analysis will provide a framework for future MDSS evaluations and implementations as well as training tools for winter operation stakeholders in Indiana and beyond.

关键词： Weather Forecasting Winter Weather Connected Vehicle Data After-Action Report

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Study on Green transportation Behaviors in Beijing, Tokyo, and Klang Valley based on Theory of Planned Behavior 8

Study on Green Transportation Behaviors in Beijing, Tokyo, a...

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8th IEEE International Conference on Intelligent transportation engineering, ICITE 2023

作者： Zheng, Youfu Chai, Yida Le, Yiping Lu, Huapu School of Engineering Shibaura Institute of Technology Innovative Global Program Tokyo Japan Institute of Transportation Research Tsinghua University Beijing China

ISBN: (纸本)9798350314212

This study employed Structural Equation Modeling (SEM) to examine green travel behavior in three different urban areas: Beijing, Tokyo, and the Klang Valley. The analysis was based on the Theory of Planned Behavior (TPB), and it aimed to assess how three key variables (attitude, subjective norms, and perceived behavioral control) influenced green travel intentions, leading to the formulation of six hypotheses. The research findings revealed that the model was well-suited for Beijing and the Klang Valley, as indicated by several tests for structural fit. However, it was found to be less appropriate for Tokyo. In Beijing, the results suggested a strong intention among citizens to engage in green travel, implying a high willingness to use eco-friendly transportation options. In both Beijing and the Klang Valley, the three variables positively impacted green travel intentions, thus supporting the hypotheses derived from the TPB. However, the model was not as suitable for Tokyo. Moreover, the study highlighted that personal values and social pressures had limited influence across all three cities. Beijing and Klang Valley residents seemed to prioritize the ease of using green travel options, while Tokyo residents appeared to be less influenced by this factor. This could be attributed to Tokyo's highly developed rail transit system, where residents may choose green travel not solely due to their willingness but rather because of the convenience it offers. © 2023 IEEE.

关键词： comparative analysis green transportation structural equation modeling theory of planned behavior

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The Effect of Air Cavity on Water Resistance of a High-Speed Ferry with a Several-Stepped Hull 33rd

The Effect of Air Cavity on Water Resistance of a High-Speed...

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33rd International Ocean and Polar engineering Conference, ISOPE 2023

作者： Anggriani, Andi Dian Eka Mutsuda, Hidemi Nakashima, Takuji Ardianti, Andi Baso, Suandar Transportation and Environmental System Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima-shi Higashihiroshima Japan Transportation and Environmental Systems Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima-shi Higashihiroshima Japan Naval Architecture Study Program Hasanuddin University South Sulawesi Gowa Indonesia

ISBN: (纸本)9781880653807

A planing hull high-speed ferry with a stepped hull becomes a well-liked mode of water transportation for archipelago countries. On the other hand, the shape of steps on the bottom hull has not been recently taken into explicit consideration regarding the speed requirement and hydrodynamic properties. In this study, the step W shapes, were adopted to find the improved hydrodynamic performance in the planing conditions. To provide a more precise prediction of the pressure, velocity fields, and void fraction, the CFD was applied the Finite Volume Method (FVM) and coupled with Volume of Fluid Method (VOF) to capture air cavity The numerical conditions of the planing hull were trimmed by the stern with 2, and 3 degrees. This study discussed the air cavity that occurred behind the stepped area that can affect the hydrodynamic behaviour. © 2023 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Finite volume method

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MOSFET Based Active Rectifier Design in Wireless Capacitive Power Transfer for Electric Vehicles 1

MOSFET Based Active Rectifier Design in Wireless Capacitive ...

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1st International Conference on Smart Mechatronics, ICSMech 2024

作者： Dragon, Klemens Raphael Lie, Zener Sukra Muharam, Aam Ika, Juan Luciano Perdana, Muhamad Arjuna Amin Hapid, Abdul Binus Aso School of Engineering Bina Nusantara University Automotive and Robotics Program Computer Engineering Department Jakarta Indonesia Badan Riset dan Inovasi Nasional Research Center for Transportation Technology Jawa Barat Bandung Indonesia

ISBN: (纸本)9798350368918

While the rise of electric vehicles reflects a push for clean energy as envisioned by international agreements like the Paris Agreement, wireless charging's convenience can overcome limitations and hasten their adoption, making it a strategic step alongside regulations such Permenhub No. 15/2022 and SDG 9 'Industry, Innovation, and Infrastructure' for cleaner air and sustainable transportation. The aim is to convert the high frequency AC voltage from the coupling capacitor into a stable DC voltage. Further increase the system sensitivity to the load variations, by designing a MOSFET based active rectifier. By changing load parameters, the accuracy of PFC adaptation to the battery State of Charge (SOC) obtained is at 98% with 2% tolerance for errors. It is concluded that the research is said to be successful because it has met the parameters of general research hypothesis where the system is able to convert high frequency AC voltage into a stable DC voltage. © 2024 IEEE.

关键词： State of charge

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Autonomous self-healing 3D micro-suction adhesives for multi-layered amphibious soft skin electronics

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InfoMat 2024年第10期6卷 65-79页

作者： Dohyun Lim Min Woo Jeong Hyeongho Min Yeon Soo Lee Gui Won Hwang Seung Hwan Jeon Kyu Ho Jung Ngoc Thanh Phuong Vo Min-Seok Kim Da Wan Kim Jin Young Oh Changhyun Pang School of Chemical Engineering Sungkyunkwan University(SKKU)SuwonGyeonggi-doRepublic of Korea Department of Chemical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Convergence Research Group for Meta-Touch Korea Research Institute of Standards and ScienceDaejeonRepublic of Korea Department of Electronic Engineering Korea National University of TransportationChungju-siChungbukRepublic of Korea Samsung Advanced Institute for Health Sciences and Technology(SAIHST) Sungkyunkwan UniversitySuwonGyunggi-doRepublic of Korea

Autonomously self-healing, reversible, and soft adhesive microarchitecturesand structured electric elements could be important features in stable and versatilebioelectronic devices adhere to complex surfaces of the human body(rough, dry, wet, and vulnerable). In this study, we propose an autonomousself-healing multi-layered adhesive patch inspired by the octopus, which possessself-healing and robust adhesion properties in dry/underwater *** implement autonomously self-healing octopus-inspired architectures, adynamic polymer reflow model based on structural and material design suggestscriteria for three-dimensional patterning self-healing elastomers. In addition,self-healing multi-layered microstructures with different moduli endowsefficient self-healing ability, human-friendly reversible bio-adhesion, and stablemechanical deformability. Through programmed molecular behavior ofmicrolevel hybrid multiscale architectures, the bioinspired adhesive patchexhibited robust adhesion against rough skin surface under both dry andunderwater conditions while enabling autonomous adhesion restoring performanceafter damaged (over 95% healing efficiency under both conditions for24 h at 30℃). Finally, we developed a self-healing skin-mountable adhesiveelectronics with repeated attachment and minimal skin irritation by laminatingthin gold electrodes on octopus-like structures. Based on the robust adhesionand intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damagedconditions.

关键词： biomimetics dry adhesive self-healing polymer stretchable electronics

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Study on Development and Application of Lightweight Overhead Contact Line Poles for Emergency Recovery

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Transactions of the Korean Institute of Electrical Engineers 2023年第11期72卷 1568-1574页

作者： Cho, Ho-Ryung Nam, Han-Seok Kim, Jong-Nam You, Hong-Kuk Na, Young-Jae Kim, Jae-Moon Department of Transportation Systems Engineering Graduate School of Transportation Korea National University of Transportation Korea Republic of Graduate School of Transportation Department of Transportation System Engineering Doctorate Program OCS solution Co. Ltd Korea Republic of Korea Railroad Corporation Korea Republic of Department of Transportation Systems Engineering Korea National University of Transportation Korea Republic of

In the event of loss of roadbed on an electric railway line due to typhoon or heavy rain damage caused by abnormal weather, or damage to a subway pole due to an unexpected train derailment, installation of catenary poles for emergency recovery is necessary to restore the electric railways. Conventional emergency catenary poles are made of steel, so they are very heavy, and the length per unit is large, making transportation and installation inconvenient. Also, there is a risk of industrial accidents due to workers' musculoskeletal disorders. In this study, we developed an emergency recovery catenary pole using aluminum, a lightweight material, and researched and developed a slimmer rail fastening device that can also be applied to concrete ballast. The developed product underwent factory testing and reference testing, was assembled and installed on a field test, and then a safety test was performed. The product developed is expected to minimize disruption to train operations and prevent industrial accidents for related workers by safety and quickly restoring electric railways. Copyright © The Korean Institute of Electrical Engineers.

关键词： Poles

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Analysis of the Causal Effects of Bus Lanes on Performance Indicators of Public Transport Corridors

SSRN

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SSRN 2024年

作者： De Brito-Filho, Francisco Nilso Oliveira-Neto, Francisco Moraes Postgraduate Program in Transportation Engineering Department of Transportation Engineering Federal University of Ceará UFC Campus do Pici Bloco 703 Ceara Fortaleza60440-900 Brazil

Bus lanes are frequently recommended in the literature to enhance transit efficiency. However, the improvements reported by transport agencies following bus-only lane interventions often lack rigorous evaluation using causal inference methods. This gap raises concerns about potential biases and the omission of relevant covariates that could influence the outcomes. Addressing these issues is crucial, particularly in understanding both the direct and indirect effects of bus lanes on operational indicators like speed and reliability, given the cyclic relationship between transit level of service and ridership. This paper therefore investigates the causal relationships between the determinants of public transport operations and examines how these factors are altered by bus lanes. We aim to estimate the direct and indirect causal effects of such interventions using a comprehensive approach that begins with the creation of a mental map outlining the key determinants affecting public transport demand and performance. This is followed by the development of a causal diagram to estimate the impact of bus lane interventions. To demonstrate the practical application of this approach, we conducted a case study assessing bus lane interventions in the transit corridors of Fortaleza, Brazil, using observational data from the system's operation. Our findings contribute methodologically and practically by offering transport planners and practitioners a framework for assessing bus lanes effects on bus speed and reliability, as well as understanding how these lanes can indirectly influence these outcomes through increased ridership, stressing the importance of rigorous policy evaluation in public transport planning. © 2024, The Authors. All rights reserved.

关键词： Mass transportation

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Mechanistic modeling of copper corrosions in data center environments

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Building Simulation 2024年第3期17卷 483-492页

作者： Rui Zhang Jianshun Zhang Roger Schmidt Jeremy L.Gilbert Department of Mechanical and Aerospace Engineering College of Engineering and Computer ScienceSyracuse UniversitySyracuseNY13244USA Buildings and Transportation Science Division Oak Ridge National LaboratoryOak RidgeTN37830USA SyracuseCoE-New York Center of Excellence in Environmental and Energy Systems Syracuse University727 E.Washington StreetSyracuseNY13244USA Department of Bioengineering Clemson UniversityClemson-Medical University of South Carolina Bioengineering ProgramCharlestonSC29425USA

Air-side economizers are increasingly used to take advantage of“free-cooling”in data centers with the intent of reducing the carbon footprint of ***,they can introduce outdoor pollutants to indoor environment of data centers and cause corrosion damage to the information technology *** evaluate the reliability of information technology equipment under various thermal and air-pollution conditions,a mechanistic model based on multi-ion transport and chemical reactions was *** model was used to predict Cu corrosion caused by Cl_(2)-containing pollutant *** also accounted for the effects of temperature(25℃and 28℃),relative humidity(50%,75%,and 95%),and *** also identified higher air temperature as a corrosion barrier and higher relative humidity as a corrosion accelerator,which agreed well with the experimental *** average root mean square error of the prediction was 13.7Å.The model can be used to evaluate the thermal guideline for data centers design and operation when Cl_(2)is present based on pre-established acceptable risk of corrosion in data centers’environment.

关键词： chloride pollutant mixture copper corrosion model data center temperature relative humidity synergistic effect

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