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Examining associations with on-time performance and identifying relevant road network, demographic, socioeconomic and land use characteristics within the bus stop vicinity for proactive and reliable public transportation system planning

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Multimodal Transportation 2023年第4期2卷

作者： Mishra, Raunak Pulugurtha, Srinivas S. Mathew, Sonu Former Graduate Student of Infrastructure and Environmental Systems Ph.D. Program The University of North Carolina at Charlotte 9201 University City Boulevard Charlotte 28223-0001 NC United States Professor & Research Director of Civil & Environmental Engineering Department Director of Infrastructure Design Environment and Sustainability (IDEAS) Center The University of North Carolina at Charlotte 9201 University City Boulevard Charlotte 28223-0001 NC United States Post-Doctoral Researcher of IDEAS Center The University of North Carolina at Charlotte 9201 University City Boulevard Charlotte 28223-0001 NC United States

Growing population, rapid urbanization, and increasing travel demand emphasize the need for reliable public transportation systems and sustainable transportation planning. A reliable bus service fosters a more significant, satisfied, and committed base of users. This research focuses on examining the association between on-time performance (OTP) and road network, demographic, socioeconomic, and land use characteristics to identify relevant external factors for proactive and reliable public transportation system planning. The analysis was conducted at a bus stop level. Bus arrival/departure data from the Charlotte Area Transit System (CATS) was obtained. The road network, demographic, socioeconomic, and land use characteristics were captured within 0.25-mile and 0.50-mile buffers. Pearson correlation analysis was conducted to understand the association between OTP and road network, demographic, socioeconomic, and land use characteristics by day of the week and time of the day. The results show that OTP is associated with external factors such as the number of signalized or cul-de-sac/dead-end intersections, number of lanes, network density, population, income (median and total), and land use types related to residential and commercial/employment purposes within the bus stop vicinity. The findings provide vital insights for transit agencies to enhance scheduling, service and maximize benefits, effectively utilize available resources, plan, and provide equitable services to all riders. © 2023 The Author(s)

关键词： Bus stop Demographic Land use On-time performance Pearson correlation Road network Socioeconomic Transit

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Sustainability assessment of groundwater in south-eastern parts of the western region of Ghana for water supply

Cleaner Water

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Cleaner Water 2024年 1卷

作者： Ernest Biney Bernard Akwasi Mintah Ernest Ankomah Albert Elikplim Agbenorhevi Daniel Buston Yankey Ernestina Annan Department of Geomatic Engineering Kwame Nkrumah University of Science and Technology University Post Office Box PMB Kumasi Ghana WASCAL Graduate Research Programme on Climate Change and Land Use Department of Civil Engineering Kwame Nkrumah University of Science and Technology Kumasi Ghana Department of Geological Engineering University of Mines and Technology Tarkwa Ghana Graduate Research Program on Climate Change and Water Resources West African Science Service Center on Climate Change and Adapted Land Use (WASCAL) University of Abomey-Calavi Benin

The study assessed the physicochemical and biological properties of selected groundwater sources in the Southeastern part of the Western Region, to assess the impact on water quality and health risk. The Piper Trilinear plot was used to categorize the water samples into water types based on the dominant anion and cation concentrations. Statistical analysis (One way ANOVA and two sample t-test) was used to determine the sources of variation in the data at 95% confidence interval. The Water Quality Index (WQI) and Hazard Quotient (HQ) were used to estimate the water quality and health risk respectively. TDS and turbidity were above the acceptable WHO guidelines in 16.7% of the samples with a mildly acidic pH in 83.3% of the water samples. Also, 91.7% of the water samples were contaminated with total coliform (TC) and 25% with e-coli. Generally, the groundwater samples were dominated by Ca 2+ and HCO 3- ion water types. The variations between parameters were found not significant for all the parameters (p>0.05). Water samples in the North are of good quality with a mean WQI of 96, but of poor quality in the South with a mean WQI of 144.6. HQ values for all the samples were less than 0.1, suggesting less harmful impacts of the heavy metal concentrations on human health. Overall, the results showed the presence of heavy metals in the groundwater sources sampled, however in quantities with low health risks either through oral or dermal channels. Groundwater within the communities is good for domestic purposes but needs treatment for drinking. To improve upon the study, it is recommended that further studies consider a higher number of samples and include other accessible groundwater stations where possible.

关键词： Health Risk Assessment Groundwater GIS Trace elements Water Quality Index

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Effect of oil palm fiber on physical and tribological behavior of unsaturated polyester-oil palm ash composite

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AIP Conference Proceedings 2024年第1期3213卷

作者： Diva Almira Syahrul Humaidi Nurdin Siregar Doli Bonardo Post Graduate Program (Physics) FMIPA Universitas Sumatera Utara Jl. Bioteknologi I Kampus USU Medan 20155 Indonesia Department of Physics Faculty of Mathematics and Natural Science Universitas Negeri Medan Jl. Willem Iskandar Pasar V Deli Serdang 20221 Indonesia Refrigeration and Air Conditioning Engineering Study Program Politeknik Tanjungbalai Jl. Sei Raja Sei Tualang Raso Tanjungbalai 21345 Indonesia

Preliminary studies have successfully been conducted on the physical characterization and tribological behavior of oil palm fiber-reinforced composites based on unsaturated polyester and oil palm ash. In an effort to initiate segregation of composite particles, oil palm ash was used as a segregation agent to increase the surface roughness of the material. The composite preparation method was carried out using the hand lay-up technique for 1 hour at 100 °C. Methyl ethyl ketone peroxide was used as a hardening agent to increase the hardness of the composite. The composite that contained 10 wt.% oil palm fiber reinforced unsaturated polyester-oil palm ash showed the lowest porosity and highest density values compared to the other samples. The decrease in porosity and increase in density can be attributed to the incorporation of 10 wt.% oil palm fiber, which promotes increased segregation of the composite particles, leading to an overall volume increase. Furthermore, the increase in density results in a drastic decrease in the rate of water absorption. The sample with the optimal wear level also had the lowest value compared to the other samples, and this reduction in wear and tear is supported by the high coefficient of friction it exhibits.

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Antioxidant compounds of leaves and seeds extracts of Parkia Speciosa overcome ferroptosis

Food Chemistry Advances

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Food Chemistry Advances 2025年 7卷

作者： Elsa Nopiyanti Mega Safithri Trivadila Sahidin Harlinda Kuspradini Femi Earnestly Yoko Hirata Hiroshi Takemori Irmanida Batubara Department of Chemistry Chemistry Post-graduate Program Bogor Agricultural University Bogor West Java Indonesia Department of Biochemistry Chemistry Post-graduate Program Bogor Agricultural University Bogor West Java Indonesia Department of Pharmacy Faculty of Pharmacy Universitas Halu Oleo Kendari Indonesia Faculty of Forestry Universitas Mulawarman Samarinda East Kalimantan Indonesia Faculty of Pharmacy Muhammadiyah University of Sumatera Barat Padang West Sumatera Indonesia Life Science Research Center Institute for Advanced Study Gifu University Gifu Japan Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University Gifu Japan Tropical Biopharmaca Research Center IPB University Bogor West Java Indonesia

Parkia speciosa seeds, a widely consumed plant in Southeast Asia, are known for their rich bioactive compounds with potential health benefits. This study investigates the antioxidant properties of ethanol extracts from P. speciosa leaves (PSL) and seeds (PSS) to combat oxidative stress. Antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays, revealing that PSL exhibited higher antioxidant potential than PSS, with values of 14.34 ± 0.02 and 19.39 ± 0.04 μg ascorbic acid equivalent (AAE)/g extract, respectively. The ethanol extracts of PSL and PSS significantly protected HT22 cells from erastin-induced ferroptotic cell death and activated the antioxidant response element (ARE) pathway, enhancing endogenous antioxidant defense mechanisms. Furthermore, in silico molecular docking analysis identified 7,7′-Dihydroxy-5′‑methoxy-2′,2′-dimethyl-4-oxo-3′,4′-dihydro-2′H,4H-3,6′-bichromen-5-yl hexopyranosiduronic acid as a promising bioactive compound with strong binding affinities to oxidative stress-related receptors (5i6x, 6cm4, 2f8a, 8bxn, and 8ivr). These findings suggest that P. speciosa ethanol extract, particularly from its leaves, exhibits strong antioxidant and neuroprotective properties, supporting its potential application as a natural therapeutic agent for oxidative stress-related disorders.

关键词： 7,7′-Dihydroxy-5′-methoxy-2′ 2′-dimethyl-4-oxo-3′ 4′-dihydro-2′H 4H-3 6′-bichromen-5-yl hexopyranosiduronic acid antioxidant response element HT22 cells Ferroptosis, P. speciosa

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Design alternative on peat soil

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IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Vicky Muroby Chaidir Anwar Makarim Civil Engineering Post-graduate Program Faculty of Engineering Universitas Tarumanagara

Construction on peat soil has its own difficulty and challenge due to its properties of low shear strength, high compressibility, high water content, and flammable material. Indonesia ranked 4th on peat land area around the world after Canada, Russia, and United States. Based on recent mapping, peat land covers 14,9 million hectare in Indonesia. This paper presents the finding from literature studies regarding peat soil, construction on peat soil, case studies for road infrastructure construction on peat soil at West Borneo, Indonesia, and provide analysis and recommendation for the problems faced. Construction on peat soil requires special attention, especially on the design and execution. In the event where construction must be performed on a peatland which thickness is < 3m, the approach recommended is peat removal and replacement. If the peat thickness is 3-10 m, adopt the preloading, construction with vertical and sand drain, lightweight fills, surface mattress, stone column, etc. If the peat thickness is < 10m, use pile as foundation. Unit price contract is preferable over lumpsum contract due to the high uncertainties of peat soil. Environment impact due to construction on peat soil need to be accounted for, also the risk of peat fires need to be considered if dewatering used.

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An assessment of rolled stainless steel angles under compression 7th

An assessment of rolled stainless steel angles under compres...

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7th International Conference on Structural engineering, Mechanics and Computation, 2019

作者： da Sirqueira, A.S. da Vellasco, P.C.G.S. de Lima, L.R.O. da Silva, A.T. Rodrigues, M.C. Vellasco, M.M.B.R. PGECIV-Civil Engineering Post-Graduate Program UERJ – State University of Rio de Janeiro Brazil Structural Engineering Department UERJ – State University of Rio de Janeiro Brazil Electrical Engineering Department PUC-Rio – Pontifical Catholic University of Rio de Janeiro Brazil

ISBN: (纸本)9781138386969

Stainless steel has been used in several types of constructions. Although many of their mechanical properties are similar to the properties of carbon steel, their nonlinear characteristics imply in different design rules. This non-linearity mainly affects the response to local and flexural buckling. The Eurocode 3: Part 1-4 (2006) stainless steel design standard can be applied to hot rolled, welded and cold formed products, but the provisions of this code are rather conservative, with a limited application due to the lack of experimental data. Thus, one of those areas that require attention and study concerns the behaviour of columns made of rolled stainless steel angles. This paper describes an experimental campaign made on rolled stainless steel angles under axial compression. The tests were performed on stainless steel rolled angles with lengths varying from 150 mm to 1400 mm while the collapse involved: flexural-torsional and flexural buckling modes. © 2019 Taylor & Francis Group, London, UK.

关键词： Hot rolling

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Linking agro-industrial engineering body of knowledge with industry 4.0: A case study of agro-industrial engineering study program at IPB University

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IOP Conference Series. Earth and Environmental Science 2020年第1期443卷

作者： Djatna, T Graduate and Post Graduate Program of Agro-industrial Engineering Study Program- IPB University Bogor Indonesia 16680

The emergence of Industry 4.0 paradigms has been forcing and changing the landscape aspect of engineering education, as seen in agro-industrial engineering body of knowledge (AIEBoK). These paradigms push to adapt and to prepare a new approach for curriculum content and delivery. It is urgent to re-think and redefine how to prepare a newer perspective into the three combined disciplines that form AIE-BoK, namely Industrial and system engineering, process/bioprocess engineering, and industrial environmental engineering. They should clearly intertwine their relevance in parallel with pillars of the industry 4.0. These stakeholder’s requirements are the main motivation of this work. Within Industry 4.0 vision, AIE-BoK is investigated on how disruptive technologies play a role in changes. Some issues related to how to utilize common connectivity in technology advancement and to push a relevant curriculum both content and structure are discussed. In order to construct a new map and landscape of curriculum relevancy, it continues with the discussion of how and where agro-industrial engineering education attempts to interpret new roles in industrial revolution 4.0. Along with the consideration of how this interpretation potentially changes agro-industrial products, services, and manufacturing. In closing, a discussion of how agro-industrial engineering curriculum should respond is briefly discussed.

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Performance assessment design based on problem based learning for vocational high school students skills competency geomatics engineering

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AIP Conference Proceedings 2022年第1期2489卷

作者： Reni Nuril Komari Sudjani Sudjani Johar Maknun 1Technology and Vocational Education Post Graduate Program Universitas Pendidikan Indonesia Bandung Indonesia 2Department of Civil Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia 3Department of Architecture Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia

The study of performance assessment based on problem based learning not only done in the field of technical vocational education but also in the health education, economic education, environmental education. The development of performance assessment based on problem based learning is still rare in vocational schools. Using 2013 curriculum which is required to use 21st century learning strategies, one of which is Problem Based Learning (PBL). Performance assessment is said by its advocators to be more in line with instruction than multiple-choice tests. Performance assessment is seen as having a better possibility of measuring more complex skills and communication. This article aims to design based performance assessment based on problem based learning using design based research method. The validation used in this article is expert judgement. The result of the study revealed that the cronbach alpha valu for the entire measurment scale was 0.97. The cronbach alpha value is between 0.8 to 1.00. Therefore , design performance assessment based on problem based learning has a good reability. This article aims to find out how to design performance assessment based on problem based learning for students geomatics engineering. This article provide an overview of the development of design performance assessment based on problem based learning for vocational students.

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The Water Quality Characteristics and Quality Status of Bengkulu River and Nelas River, Bengkulu Province: Conditions for The Last Six Years

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IOP Conference Series: Earth and Environmental Science 2022年第1期950卷

作者： I Khalik A Sapei S Hariyadi E Anggraeni Natural Resources and Environmental Management Study Program Graduate School of IPB University Bogor Indonesia Public Health Study Program STIKES Tri Mandiri Sakti Bengkulu Indonesia Department of Civil and Environmental Engineering IPB University Bogor Indonesia Department of Aquatic Resources Management IPB University Bogor Indonesia Department of Agroindustrial Technology IPB University Bogor Indonesia

The existence of extractive activities around the river has a negative impact on the quality of river water. This study aims to provide an overview of water quality characteristics and water quality status of Bengkulu River and Nelas River in Bengkulu Province. The data used is river quality monitoring conducted by the Environment and Forestry Service of Bengkulu Province from 2014 to 2019. Measurements are carried out twice a year representing, the dry season (March to June) and the rainy season (September to December). The observation stations representing upstream, middle and downstream of rivers conditions. The parameters observed were physical, chemical, and biological parameters. The water quality status is determined using the Storet Index. The results show that both rivers have Storet Index >-31. It means that these river water are heavily polluted. Parameters that have exceeded the water quality standard are TSS, DO, BOD, COD, Fe, Mn, Cu, and total coliform. The river water quality parameters, especially heavy metals, may be caused by open land being washed and carried into the river body. The existence of population and animal activities as well as industrial waste outlets at upstream also affect the decline of river water quality.

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Gold Nanoparticle Decorated Bismuth Vanadate Casting on Screen-Printed Electrode for Chlortetracycline Detection in Tap Water

SSRN

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SSRN 2024年

作者： Ngo, Duy Ba Gopi, Praveen Kumar Rajkumar, Muniyandi Chen, Shen-Ming Rijiravannich, Patsamon Khownarumit, Porntip Somasundrum, Mithran Surareungchai, Werasak Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Analytical Sciences and National Doping Test Institute Mahidol University Rama VI Rd. Bangkok10400 Thailand Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East Rd. Taipei106 Taiwan Bioscience and System Biology Research Team National Center for Genetic Engineering and Biotechnology National Sciences and Technology Development Agency at KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Pilot Plant Development and Training Institute KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Nanoscience and nanotechnology graduate program Faculty of Science KMUTT Pracha Uthit Rd. Bangkok10140 Thailand PSG College of Arts and Science Civil Aerodrome Post Tamil Nadu Coimbatore641014 India Quarter 6 Linh Trung Ward Thu Duc City Ho Chi Minh City720400 Viet Nam

Background Chlortetracycline (CTC) belongs to the class of tetracycline’s compounds, which is known for its antibacterial activity. CTC was largely consumed by farm animals than humans, which leads to the growth antibiotic – resistant bacteria and environmental contamination. So far no one reported the electrochemical detection and determination of CTC by using AuNPs@BiVO4 composite. Some reports have been reported using conventional chromatography which is most expensive, time-consuming and highly equipped method. Results Here, we report a simple method for preparing gold nanoparticle decorated bismuth vanadate (AuNPs@BiVO4), which was dropped cast on a screen-printed carbon electrode (SPCE). The AuNPs@BiVO4 and AuNPs@BiVO4/SPCE materials were characterized using TEM, SEM-EDX, XPS, DLS, ELS, EIS, and CV. The as-prepared AuNPs@BiVO4/SPCE was used to detect and determine chlortetracycline (CTC) by different pulse potentials in phosphate buffer pH 7.0. The electrode possessed a wide linear range of 0.99 – 19.06 µM, with obtained LOD = 0.15 µM, LOQ = 0.49 µM, and sensitivity = 0.059 μA μM-1 cm-2. It also exhibited good selectivity, stability, and repeatability, recovering 87.14% - 100% for detecting CTC in Mili Q and tap water. Significance Facile and rapid synthesis of AuNPs@BiVO4 nanocomposite film modified electrode at physiological pH conditions has been prepared and A highly electrochemical detection and determination of CTC using AuNPs@BiVO4 nanocomposite film has been developed for the first time. Thus, the proposed electrode could be applied for the detection and determination of CTC in water sources and has the potential to be used for real sample analysis. © 2024, The Authors. All rights reserved.

关键词： Nanocomposites

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