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Enhancing Construction Claims Resolution Efficiency: A Systematic Review of the UAVs Applications in Construction Claim Management

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Journal of Legal Affairs and Dispute Resolution in engineering and Construction 2025年第3期17卷

作者： Al Omari, Mohammad Ataei, Hossein Seyrfar, Abolfazl Alqaisi, Aaraf Osman, Ibrahim Dept. of Civil Materials and Environmental Engineering Univ. of Illinois at Chicago 1200 W Harrison St. ChicagoIL60607 United States Construction Engineering and Management Program Dept. of Civil Materials and Environmental Engineering Univ. of Illinois at Chicago 1200 W Harrison St. ChicagoIL60607 United States

Construction claims correspond to the significant drain of top management energy, focus, financial resources, and time. Even utilized modern project management (PM) approaches in claim resolution did not offer comprehensive solutions. Incomplete resolution of a claim results in a dispute, a more challenging, lengthy, and complex problem. Some construction specialists have tried incorporating new technologies, exclusively unmanned aerial vehicles (UAVs), in construction to perform certain activities, contributing to enhanced efficiencies, productivity, and practicalities. While the available literature does contain rich discussions of UAV applications in various construction tasks, it does lack broad investigations on UAV rationale to resolve complicated claims. Accordingly, a systematic review is conducted to bridge this knowledge gap, identifying multiple UAV workabilities and feasibilities in claim resolution. A meta-analysis is applied to offer crucial statistics on claim value and length universally, clarifying UAV importance in minimizing corresponding financial losses and time. The systematic review outcomes revealed that UAVs could participate in supplying concise, rapid, massive, flexible, and high-resolution data to resolve claims. They can replace traditional physical inspection needed in particular situations, traveling to farthest sites, covering larger surface areas, collecting accurate data during snowy and rainy days or disasters, helping answer owner inquiries and unnecessary complaints, and resolving claims. Also, their feasibility is noted during snowy and rainy days or other situations where physical inspection is not possible, causing the postponement of meeting sessions, either in construction companies or courts, until proofs are provided. Their contribution is reflected in clarifying some gray data correlated with contract terms, delays, damages, site conditions, cost variations, rework, and misunderstandings. It is hoped that construction pro

关键词： Project management

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Mechanical properties of hydraulic concretes with partial replacement of Portland cement by pozzolans obtained from agro-industrial residues: A review

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Heliyon 2025年第1期11卷 e41004页

作者： Torres-Ortega, Ramon Torres-Sanchez, Diego Lopez-Lara, Teresa Engineering Program – Civil Engineering Program University of Cartagena Cartagena de Indias 130015 Colombia Department of Civil and Engineering Environmental Engineering Florida International University United States Faculty of Engineering Autonomous University of Queretaro Qro Santiago de Queretaro 76010 Mexico

The search for alternative material sources to conventional ones has had a significant impact on the construction sector today, driven by the implementation of sustainable development policies on a global scale. Alternative cementitious materials, such as agricultural industry by-products, have been introduced to ensure the efficient use of renewable natural resources while promoting a balance between the technical and economic aspects of infrastructure projects. This article provides an overview of research conducted on the use of pozzolans derived from agro-industrial by-products, such as rice husk ash (RHA), palm oil fuel ash (POFA), and sugarcane bagasse ash (SCBA), which have a high content of amorphous silica. This silica reacts with calcium hydroxide during the hydration process of Portland cement, leading to the production of calcium silicate hydrate (C-S-H) gel with cementitious properties. Investigations have explored the improvements these pozzolans provide in terms of compressive, flexural, and tensile strength in concretes where conventional Portland cement has been partially replaced by these materials. The influence of temperature and grinding processes used in their preparation was also determined, with optimal temperatures for obtaining amorphous silica ranging between 600 °C and 700 °C. Additionally, the optimal replacement levels for enhancing the mechanical properties of concrete were found to range between 10 % and 20 %. © 2024 The Authors

关键词： Agro-industrial by-products in concrete Natural pozzolans Pozzolanic concrete

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Zero Thermal Expansion Metamaterial Designs for Space Structures

Zero Thermal Expansion Metamaterial Designs for Space Struct...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Lu, Wei-Chun Oudghiri-Idrissi, Othman Poli, Andrea Arruda, Ellen M. Tol, Serife Department of Mechanical Engineering University of Michigan 2350 Hayward St Ann ArborMI48109 United States Fariborz Maseeh Department of Civil Architectural and Environmental Engineering The University of Texas at Austin 301 E. Dean Keeton St AustinTX78712 United States Department of Mechanical Engineering Macromolecular Science and Engineering Program University of Michigan 2350 Hayward St Ann ArborMI48109 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The precision of space structures is sensitive to high-temperature variation during on-orbit operations. This work develops zero thermal expansion (ZTE) metamaterials that can be integrated into space structures to restrict large thermal deformation under precision requirements. The proposed bi-material ZTE metamaterial beams show extremely low coefficients of thermal expansion (CTE) for a wide temperature variation. Static and dynamic analyses are conducted on the designed metamaterials for performance evaluation. The proposed ZTE beam elements are integrated into a 48-meter rib of a space RF antenna to enhance its thermal precision over a wide temperature range. Further, experimental validation of the ZTE truss beam design is conducted in a thermal chamber to demonstrate its low thermal deformation compared to a reference aluminum truss beam. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Trusses

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Perceptions and Pedagogical Responses of Construction Educators During COVID-19

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International Journal of Construction Education and Research 2023年第4期19卷 405-425页

作者： Langar, Sandeep Mosier, Rachel Adhikari, Sanjeev School of Civil and Environmental Engineering and Construction Management The University of Texas at San Antonio San Antonio TX United States Francis and Kathleen Rooney Construction Engineering Technology Program Oklahoma State University Stillwater OK United States Department of Construction Management Kennesaw State University Atlanta GA United States

COVID-19 impacted academia across the globe. Given the scale and sudden pandemic onset, limited empirical studies identify the transition’s impact on the US construction educators and education imparted. The study determined the pedagogical responses of educators associated with construction programs within the US during COVID-19 and tested six relationships in the areas of university support, technological access and infrastructure, and educator proficiency improvements. An online survey method was utilized with the instrument emailed to nearly 1,883 educators associated with construction programs/departments across the US. The study used 163 complete responses from US educators based on predefined parameters and identified the baseline operational paradigm (pre-COVID) for construction educators and programs across the US. The study determined the changes after the transition and investigated the impacts of the transition on faculty proficiency with online teaching, existing technological infrastructure, and communication with students. The study identified a moderate relationship between the University’s level of support and educators’ experiences in developing and delivering online materials during the transition. A moderate relationship was also identified between proficiency with online content delivery and total teaching experience. Finally, only a few respondents felt construction education could be delivered entirely online, based on their experiences. © 2022 Associated Schools of Construction.

关键词： construction educators COVID-19 impacts on academia online education pedagogical responses to COVID-19

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Initial Indications of Safety of Driverless Automated Driving Systems

arXiv

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arXiv 2024年

作者： Chen, Jiayu Joyce Shladover, Steven E. Department of Civil and Environmental Engineering University of California Berkeley United States California PATH Program University of California Berkeley United States

As driverless automated driving systems (ADS) start to operate on public roads, there is an urgent need to understand how safely these systems are managing real-world traffic conditions. With data from the California Public Utilities Commission (CPUC) becoming available for Transportation Network Companies (TNCs) operating in California with and without human drivers, there is an initial basis for comparing ADS and human driving safety. This paper analyzes the crash rates and characteristics for three types of driving: Uber ridesharing trips from the CPUC TNC Annual Report in 2020, supervised autonomous vehicles (AV) driving from the California Department of Motor Vehicles (DMV) between December 2020 and November 2022, driverless ADS pilot (testing) and deployment (revenue service) program from Waymo and Cruise between March 2022 and August 2023. All of the driving was done within the city of San Francisco, excluding freeways. The same geographical confinement allows for controlling the exposure to vulnerable road users, population density, speed limit, and other external factors such as weather and road conditions. The study finds that supervised AV has almost equivalent crashes per million miles (CPMM) as Uber human driving, the driverless Waymo AV has a lower CPMM, and the driverless Cruise AV has a higher CPMM than Uber human driving. The data samples are not yet large enough to support conclusions about whether the current automated systems are more or less safe than human-operated vehicles in the complex San Francisco urban environment. © 2024, CC BY.

关键词： Public utilities

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Software Development Based on Sign Language Video Integration to Increase Accessibility of Port Information for the Deaf in Sanur-Bali

Software Development Based on Sign Language Video Integratio...

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International Conference on Smart Computing & Communications (ICSCC)

作者： Decky Cipta Indrashwara Md. Wira Putra Dananjaya I Gede Fery Surya Tapa I Nyoman Indra Kumara Dewa Ayu Trisna Adhiswari Wedagama I Komang Agus Ariana Civil Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia Technology Information Study Program Universitas Pendidikan Nasional Denpasar Indonesia Environmental Engineering Universitas Pendidikan Nasional Denpasar Indonesia

ISBN: (数字)9798350363104

ISBN: (纸本)9798350363111

This research focuses on Sanur Harbor, an inter-island ferry port located in southern Bali. The majority of visitors to Sanur Harbor are tourists who want to travel to Nusa Penida Island. At this port, facilities are available in the form of a Public Address System (PAS) and Information officers whose job is to provide information regarding the arrival and departure of ships. However, the effectiveness of this facility is limited for deaf people. Deaf people often have difficulty getting this information independently and often have to rely on manual assistance from officers. This research aims to develop software based on sign language video integration which aims to increase the accessibility of departure and arrival information at Sanur Harbor for deaf people in Bali. The software development method uses a user-centered design development approach which involves the stages of needs analysis, design, implementation, and evaluation. Sign language videos will be integrated into the software as a medium to convey important information about ship departure and arrival schedules, travel routes, pier names, fast boat names, and other important information to deaf users. Evaluation is carried out through user testing and collecting feedback from users regarding understandability, usability, and user satisfaction with the software being developed. It is hoped that the results of this research can make a positive contribution to increasing information accessibility for deaf people in Sanur Harbor and can become a basis for developing similar technology in other locations.

关键词： Sign language Schedules User centered design Information services Manuals Seaports Software Usability Software development management Testing

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Microplastics in wastewater and sludge from centralized and decentralized wastewater treatment plants: Effects of treatment systems and microplastic characteristics

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Chemosphere 2024年 361卷 142536页

作者： Maw, Me Me Boontanon, Narin Aung, Humm Kham Zan Zan Jindal, Ranjna Fujii, Shigeo Visvanathan, Chettiyappan Boontanon, Suwanna Kitpati Graduate Program in Environmental and Water Resources Engineering Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Nakhon Pathom73710 Thailand Research Center and Technology Development for Environmental Innovation Faculty of Environment and Resource Studies Mahidol University Nakhon Pathom73710 Thailand Graduate School of Global Environmental Studies Kyoto University Kyoto606-8501 Japan

Domestic wastewater treatment plants (WWTPs) play a vital role in limiting the release of microplastics (MP) into the environment. This study examined MP removal efficiency from five centralized and four decentralized domestic WWTPs in Bangkok, Thailand. MP concentrations in wastewater and sludge were comparable between centralized and decentralized WWTPs, despite these decentralized WWTPs serving smaller populations and having limited treatment capacity. The elimination of MPs ranged from 50 to 96.8% in centralized WWTPs and 14.2–53.6% in decentralized WWTPs. It is noted that the retained MPs concentrations in sludge ranged from 20,000 to 228,100 MP/kg dry weight. The prevalence of synthetic fibers and fragments could be attributed to their pathways from laundry or car tires, and the accidental release of a variety of plastic wastes ended up in investigated domestic WWTPs. Removal of MPs between the centralized and decentralized WWTPs was influenced by several impact factors including initial MP concentrations, longer retention times, MP fragmentation, and variations of MP concentrations in sludge leading to different activated sludge process configurations. Sewage sludge has become a primary location for the accumulation of incoming microplastics in WWTPs. The MPs entering and leaving each unit process were varied due to the unique characteristics of MPs, and their different treatment efficiencies. While the extended hydraulic retention period in decentralized WWTPs decreased the MP removal efficacy, the centralized WWTP with the two-stage activated sludge process achieved the highest MP removal efficiency. © 2024 The Authors

关键词： Microplastic

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Integrating clustering algorithms and machine learning to optimize regional snapshot municipal solid waste management for achieving sustainable development goals

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environmental Advances 2025年 19卷

作者： Taweesan, Achara Kanabkaew, Thongchai Surinkul, Nawatch Polprasert, Chongrak Department of Environmental Science Faculty of Science Ramkhamhaeng University Bangkok Thailand Occupational and Environmental Health Program Faculty of Public Health Thammasat University Pathumthani Thailand Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Thailand Department of Civil Engineering Faculty of Engineering Thammasat University Pathumthani Thailand

Effective municipal solid waste management (MSWM) is essential for sustainable urban development, significantly impacting environmental health, economic efficiency, and social well-being. It aligns with Sustainable Development Goal 11 (SDG11), which aims to make cities inclusive, safe, resilient, and sustainable by ensuring waste is safely managed from collection to disposal. This study evaluates the performance of MSWM practices across various cities in different regions, updated as of March 2023, to assess the achievement of SDG11. By reviewing published literature and conducting questionnaire surveys and key informant interviews with government authorities and service providers, data on access to managed MSW facilities were collected from 470 cities across various income-level regions to monitor MSWM progress toward SDG11 targets. Clustering algorithms and machine learning were employed to identify patterns and enhance MSWM practices across these regions, focusing on achieving SDG11. Hierarchical cluster analysis identified four clusters based on MSWM performance: high-income, upper-middle-income, lower-middle-income, and low-income regions. The developed decision-tree models provided a comprehensive analysis of effective MSW collection and disposal, achieving accuracies of approximately 75 % and 73 %, respectively. The models highlighted the importance of high collection coverage, proper disposal facilities, and robust institutional frameworks in achieving effective MSWM. The findings emphasize the need for targeted interventions and advanced analytical methods to enhance regional MSWM strategies, supporting the attainment of SDG11. © 2024 The Author(s)

关键词： Clustering algorithms Collection efficiency Machine learning Municipal solid waste management Sustainable development goal Treatment efficiency Waste management practices

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Carbon-negative cement-bonded biochar particleboards

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Biochar 2022年第1期4卷 219-227页

作者： Liang Chen Yuying Zhang Claudia Labianca Lei Wang Shaoqin Ruan Chi Sun Poon Yong Sik Ok Daniel C.W.Tsang Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China Research Centre for Resources Engineering Towards Carbon Neutrality The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Korea

Biochar from bio-waste pyrolysis presents excellent CO_(2) sequestration *** study innovated the design of cement-bonded particleboards utilizing a substantial amount of 50-70 wt.%pre-soaked biochar to render the products *** investigated the roles of biochar in magnesium oxysulfate cement(MOSC)system and demonstrated good mechanical and functional properties of biochar cement *** the presence of biochar,the amounts of hydration products were enriched in the cement systems as illustrated by the thermogravi-metric analyses(TGA)and X-ray diffraction(XRD).We further incorporated supplementary cementitious materials(SCMs)and generated 5 Mg(OH)_(2)⋅MgSO_(4)·7H_(2)O(5-1-7)phase in the MOSC *** a result,our designs of biochar particleboards satisfied the standard requirements for flexural strength(>5.5 MPa)and thickness swelling(<2%).Moreover,our biochar particleboards presented a low thermal conductivity as the biochar pores disrupted thermal bridging within *** illustrated that the high dosage ratio of biochar could significantly offset the CO_(2) emissions of the particleboards(i.e.,carbon-negative)via life cycle *** economic profits could also be accomplished for the biochar *** instance,the 50BC-MOSC bonded particleboard(with 50 wt.%pre-soaked biochar as aggregate,50 wt.%MOSC as binder)with promising mechanical properties could store 137 kg CO_(2) tonne^(−1) and yield an overall economic profit of 92 to 116 USD m^(−3) depending on the carbon prices in different *** summary,our new designs of carbon-negative biochar particleboards could curtail carbon emissions in the construction materials and promote the realization of carbon neutrality and circular economy.

关键词： Biochar-cement composite Carbon neutrality Wood waste biochar Magnesium oxysulfate cement Climate-positive construction materials

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Ultrathin carbon biphenylene network as an anisotropic thermoelectric material with high temperature stability under mechanical strain

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Physical Review Materials 2025年第2期9卷 024003-024003页

作者： Gözde Özbal Sargin Salih Demirci Kai Gong V. Ongun Özçelik Faculty of Engineering and Natural Sciences Sabanci University Istanbul 34956 Turkey Materials Science and Nano Engineering Program Sabanci University Istanbul 34956 Turkey Department of Physics Kirikkale University Kirikkale 71450 Turkey Department of Civil and Environmental Engineering Rice University Texas 77005 USA

Carbon biphenylene network (C-BPN), which is an ultrathin material consisting of carbon atoms arranged in square-hexagonal-octagonal (4-6-8) periodic rings, has intriguing properties for nano-scale device design due to its unique crystal structure. Here, using the Landauer formalism in combination with first-principles calculations, we show that C-BPN is a highly stable thermoelectric material at elevated temperatures under mechanical strain, where its thermoelectric efficiency can be anisotropically engineered. Transport calculations reveal that C-BPN's transmission spectrum has significant degrees of directional anisotropy and it undergoes a metal-insulator transition under strain, which leads to an increase in its Seebeck coefficient. C-BPN's lattice thermal conductance can be selectively tuned up to 35% bidirectionally at room temperature by strain engineering. Enhancement in its power factor and the suppression of its lattice thermal conductance improves the p-type figure of merit up to 0.31 and 0.46 at 300 and 500 K, respectively. Our findings reveal that C-BPN has high potency to be used in thermoelectric nanodevices with selective anisotropic properties at elevated temperatures.

关键词： Metal insulator transition

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