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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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Flood handling with priority scale determination in Samarinda Seberang from East Kalimantan Province Indonesia

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IOP Conference Series: Materials Science and engineering 2020年第1期885卷

作者： SSN. Banjarsanti P. Kukuh Theta Margaritifera Civil Engineering Study Program Samarinda State Polytechnic Civil Engineering Post-graduate Program Gunadarma University Depok

Handling of flooding caused by changes in land use often causes changes and problems in the magnitude of runoff coefficient, discharge, water level, and drainage channel dimensions, as happened in Samarinda Seberang. The purpose of this study was to plan a drainage channel according to the priority scale using the Rational Modification Method as a Hydrological Analysis and Manning as a Hydraulics Analysis. Handling method is carried out in the form of structuring and planning the drainage system according to priority scale based on inundation parameters, economic studies, social and transportation disturbances, loss of housing areas, and property rights. The higher the criteria for handling the area is a priority. The results showed that the highest priority scale (610) was obtained on Cipto Mangunkusumo street, and the lowest priority scale (220) was at Bung Tomo street and Hasanuddin street. Cipto Mangunkusumo street as the highest priority scale will be planned for the first priority drainage channel with a design flood discharge in the 10 year return period (Q) 7.79 m3 / sec, the drainage channel dimension consists of the basic width of the channel (b) 0.77 m ∼ 0.80 m, channel peak width (T) 3.30 m, channel depth (h) 1.925 m, watch height (f) 0.6 m, total depth 2.52 m, and slope of channel wall (m) 1: 1).

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The influence of earthquake force directions on building construction in Lombok Island: a case study of Pandanduri dam in East Lombok

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IOP Conference Series: Earth and Environmental Science 2020年第1期413卷

作者： F Afrizal D S Agustawijaya A Lestari Post-Graduate Study Program in Civil Engineering University of Mataram Indonesia.

Lombok Island is one of the regions in Indonesia that has a relatively high risk of earthquakes due to being flanked by two earthquake sources, namely from the south in the form of Indo-Australian plate thrusting (subduction mega-thrust) and north there is a north arc pressure (Flores thrust). Pandanduri Dam is located in the direction of the earthquake force N 171° E. This study aims to determine changes in dam planning using earthquake force calculations from SNI 1726-2002 to SNI 1726-2012 and the effect of the direction of earthquake strength on dam stability. The analysis results show that earthquake risk in Lombok Island is 0.34 g and 0.42 g for the possibility of exceeding 10% and 2% in 50 years. SNI changes in earthquake force calculations have decreased by 26% for 500 years and an increase of 10% for 2500 years. The percentage of the earthquake force directions is not known to be greater than the percentage the earthquake force directions known that N 171°E is influenced by the angle produced by the earthquake direction N 171° E which is 0.094° for the main force direction of the dam and 89,906° for the direction perpendicular to the dam.

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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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Effect of Method and Duration of Curing on the Compressive Strength of the Lime-Fly Ash Geopolymer Concrete

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Journal of Physics: Conference Series 2020年第1期1594卷

作者： Andi Arham Adam Sri Nur Akifa Atur P.N. Siregar Mustofa Department of Civil Engineering Tadulako University Post-Graduate Program Tadulako University Department of Mechanical Engineering Tadulako University

The use of lime to produce ambient cured Geopolymer concrete is one of a practical solution to avoid heat curing in the production of geopolymer concrete. The addition of lime in the geopolymer system will add another hardened mechanism, i.e. hydration in addition to condensation-polymerisation. This research aims to determine the influence of air and water curing on the strength of geopolymer concrete which uses class F fly ash and lime as raw materials. The geopolymer concrete was produced by varying the activator (sodium silicate and sodium hydroxide) with the variation of the activator to binder ratio of 0.45, 0.50, 0.55, and 0.60. Five per cent of the fly ash was replaced by slaked lime and the water added to the mix to maintain the ratio of water to solid (activator + binder) to 0.32. The test specimens were 100 mm dia x 200 mm height cylinder. Water-immersion curing was performed for 7, 14, and 21 days and the compressive strength test was done at 28 days. The results show that there is a difference in the curing process between the geopolymer concrete and the normal concrete. In the geopolymer concrete, there is a decrease in compressive strength if soaked for seven days and recovered with the increase in the age of immersion. Whereas for normal concrete, the compressive strength continues to increase with increasing age of immersion.

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Properties of concrete paving blocks made with nickel slags

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IOP Conference Series: Earth and Environmental Science 2021年第1期622卷

作者： W Mustika A Kadir E Ngii M Nurdin Post Graduate Program Engineering Management Science Halu Oleo University Kendari Indonesia 93121 Department of Civil Engineering Faculty of Engineering Halu Oleo University Kendari Indonesia 93232 Department of Chemistry Faculty of Mathematics and Natural Sciences Halu Oleo University Kendari Indonesia 93232

This study is a follow-up of nickel slag waste used for building construction materials. Paving blocks were made using a mixture of cement and aggregates in a ratio of 1: 3 and 1: 5 which used a mixture of nickel slag waste and natural sand with aggregate gradation in zone III of the rather fine sand category based on SNI 03-2834-2000. Sand substitution with nickel slag waste has used a variation of the composition of the mixture of 0% (without slag), 25%, 75%, and 100% (without sand). The behaviour would be obtained the compressive strength value of paving blocks and average water absorption. Paving blocks compressive strength were tested at the age of 28 days, while the average value of water absorption was performed by immersing the paving block specimens for 24 hours. The physical strength and absorption value of paving block water refer to SNI 03-0691-1996. The results showed that the use of nickel slag waste in making paving blocks could increase the compressive strength of paving blocks, while water absorption in all compositions and variations of the paving blocks mixture was decreased in line with the increase of nickel slag composition.

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The effect of using crumb rubber on fatigue and rutting lives in flexible pavement

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IOP Conference Series: Materials Science and engineering 2020年第1期732卷

作者： T A Balqis S Suherman Post-Graduate Student of Infrastructure Engineering Study Program Applied Master Program Politeknik Negeri Bandung Bandung Indonesia Civil Engineering Department Politeknik Negeri Bandung Bandung Indonesia

This research is performed to analyze effect of using crumb rubber (CR) on the overlay design of Palembang City – Betung roads. Analysis of existing road conditions using the AASHTO 1993. This analysis based on deflection data using the Falling Weight Deflectometer (FWD). While, the overlay design analysis using CIRCLY 7.0 software to determine horizontal tensile strain (εh) for fatigue live and vertical compressive strain (εv) for rutting live parameters. The result showed that using CR can increase fatigue live into 66 % and rutting lives into 22 % for contribute pavement performance. To ensure the effect of CR in pavement's performance, further research must be taken to find out if there are other effects that support.

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A dynamic hypothesis of sustainable construction for condominium project in the developing countries

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AIP Conference Proceedings 2021年第1期2441卷

作者： Aditya Sutantio Nadjadji Anwar I. Putu Artama Wiguna Erma Suryani 1Post Graduate Program Civil Engineering Insitut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60110 Indonesia 2Civil Engineering Insitut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60110 Indonesia 3Information System Department Insitut Teknologi Sepuluh Nopember Jalan Raya ITS Surabaya 60110 Indonesia

Developing countries are currently experiencing rapid urbanization due to economic growth which resulted in large scale of residential constructions including condominium. Despite its contribution to the society welfare, condominium projects also create significant negative impacts on the environment through the consumption of non- renewable resources. Various methods, technologies as well as regulations have been employed to overcome the problem. However, the efforts to reduce the impacts, improve resource efficiency and promote sustainable construction were challenged by the fact that adopting sustainability will increase costs during investment phase, which is the main concern of most investors. In that respect, this paper was aimed to develop a dynamic hypothesis of sustainable construction which might be applicable for condominium project in developing countries, using a case study in Surabaya, Indonesia. System dynamic modelling was utilized to analyze the interrelationship among the controlling variables that influence system behavior of sustainable construction and project cost over a certain period. Variables were selected from previous literatures relevant to sustainable construction aspects. A questionnaire was then designed to collect experts’ perception on the influencing factors to sustainability in condominium projects. It included material and energy consumption, construction waste, lean construction method, use of green materials, indicators of sustainable construction and life cycle cost. The model obtained in this study was expected to be considered as a tool for improving sustainable construction while maintaining business objective in condominium project and formulating better policy to achieve economic, social and environmental sustainability target in the future.

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NUMERICAL ANALYSIS WITH IMPLEMENTATION OF DAMAGE TO STAINLESS STEEL BOLTED CONNECTIONS SUBJECTED TO SHEAR LOAD

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ce/papers 2019年第5-6期3卷 426-435页

作者： Sobrinho, Kelvin P. Silva, André T. Rodrigues, Monique C. Henriques, José A. G. Vellasco, Pedro C. G. S. Lima, Luciano R. O. PGECIV – Post-Graduate Program in Civil Eng. State University of Rio de Janeiro – UERJ Brazil Structural Engineering Department State University of Rio de Janeiro – UERJ Brazil Faculty of Engineering Technology University Hasselt – Hasselt Belgium

In this paper, an experimental and numerical study were developed to evaluate the behavior of stainless steel bolted connections subjected to shear load until rupture, in which austenitic stainless steel 304 was used. In order to determine the material behavior, tensile coupon tests were performed. The numerical model was developed in Abaqus finite element program using dynamic explicit analysis and solid elements (C3D8) with an elastic-plastic stress-strain curve with strain hardening and damage criteria. Additionally, a comparison of the results with the recommendations given by the current standards for stainless steel structures was also accomplished. © 2020 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

关键词： Strain hardening

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Corrigendum to “Experimental and numerical investigation of SHS truss T-joints reinforced with sidewall plates” [Thin-Walled Struct. 145 (2019) 1–16]

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Thin-Walled Structures 2020年 146卷

作者： N.V. Gomes L.R.O. de Lima P.C.G. da S Vellasco A.T. da Silva M.C. Rodrigues L.F. Costa-Neves Structural Engineering Department UERJ – State University of Rio de Janeiro Brazil PGECIV - Civil Engineering Post-Graduate Program UERJ – State University of Rio de Janeiro Brazil INESCC Civil Engineering Department - University of Coimbra Portugal

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