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Properties of concrete paving blocks made with nickel slags

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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Application of factor analysis method to support the users acceptance model of ERP systems implementation

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Journal of Physics: Conference Series 2021年第1期1836卷

作者： W Sardjono J Sudirwan W Priatna G R Putra Information Systems Management Department BINUS Graduate Program -Master of Information Systems Management Bina Nusantara University Jakarta Indonesia – 11480 School of Information Systems Department BINUS Undergraduate Program Bina Nusantara University Jakarta Indonesia 11480 Informatics Engineering Engineering Bhayangkara University Jakarta Raya Indonesia Computer Science Study Program Faculty of Mathematics & Natural Sciences Pakuan University Bogor Indonesia

An e-Commerce company has been using an Enterprise Resource Planning (ERP) system for several years, but is still constrained in its implementation, this is reflected in the number of issue/change request tickets submitted by users who have not been able to reach ideal conditions. To overcome this problem, we need an appropriate reference model, the ERP system user acceptance model in companies. The study conducted factors that influence the level of acceptance of SAP ERP users in the XYZ group to then determine a model that is able to explain practically the level of ERP system user acceptance, which in turn can produce concrete proposals to increase ERP system user acceptance. Research is quantitative descriptive using factor analysis and regression analysis methods. The research method uses a questionnaire with a total of 107 valid respondents coming from 8 company names under the XYZ group in 6 Southeast Asian countries. The conclusion of the study is that there are 24 indicators and 4 factors that influence user acceptance of the SAP ERP system. These four factors are the low contribution of the ERP system, the quality of ERP systems and data, the development of ERP systems, and also the low quality of ERP system supporters. It is hoped that by optimizing the value of the 4 factors, the XYZ group can increase user acceptance of the SAP ERP system so that the system can provide benefits expected by the company to be competitive advantage.

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Spatial distribution of water quality in Belawan River, North Sumatra

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IOP Conference Series: Earth and Environmental Science 2021年第1期713卷

作者： A Mirandha Irvan H Wahyuningsih Master Program in Department of Natural Resources and Environmental Management Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia Department of Biology Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia

Belawan river is one of the rivers in North Sumatera Province. Belawan river which crosses Deli Serdang District and Medan City is used for the activities of plantation, agriculture, livestock, sand mining, a place for bathing and washing as well as serving as a lavatory, hospital, hotel, settlements, and industry. Utilization of the river as a wastewater disposal site can cause a decrease in the quality of river water. The purpose of this research was to analyze the Belawan river water quality spatially. Water sampling was taken at nine points which included three upstream segment points in Deli Serdang District, three middle segment points in Deli Serdang District and Medan City, and three downstream segment points in Deli Serdang District. Based on the results of the research it can be concluded that the value of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) at several monitoring points in Belawan river has exceeded the water quality standard limits of class I Government Regulation of Republic of Indonesia Number 82 the year 2001 and North Sumatera Governor Regulation Number 21 the year 2006.

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Statistical Bias Correction of RegCM4 Output Data (Study Area: Indramayu Regency) 7

Statistical Bias Correction of RegCM4 Output Data (Study Are...

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7th Low Carbon Asia Research Network Annual Meeting: Challenges for Asia to Meet 1.5"C Target, LoCARNet 2018

作者： Anria Boer, Rizaldi Faqih, Akhmad Natural Resources and Environmental Management Program Graduate School of Bogor Agricultural University Kampus IPB Baranangsiang Jl. Pajajaran No. 1 Bogor16143 Indonesia Center for Climate Risk and Opportunity Management in Southeast Asia and Pacific Bogor Agricultural University Kampus IPB Baranangsiang Jl. Pajajaran No. 1 Bogor16143 Indonesia Department of Geophysics and Meteorology Faculty of Mathematics and Natural Sciences Bogor Agricultural University Kampus IPB Dramaga FMIPA Building Level 4 Jalan Raya Dramaga Wing 19 Bogor16680 Indonesia

Climate data that has limitation on spatial and temporal scale becomes an obstacle in perform the climate-related research such us crop simulation, climate risk assessment and many others. Regional climate models such as RegCM4 can produce adequate outcomes of climate data in term of spatial and temporal sides. Output data from RegCM4 can be used for further research once it has been through correction process. On this study, statistical bias correction with three different transfer function (i.e. linear regression, second order polynomials and third order polynomials) were tested. The correction process that has been done on the RegCM4 rainfall data in Indramayu Regency by using third order polynomials-transfer function is able to produce climatology data with value close to observation data. Similarity between observation data and the corrected RegCM4 output data is indicated by similar temporal and spatial distributions. Based on the historical climate and projection of rainfall (1981-2065), it is known that annual rainfall will decrease by 0.84 mm/year. © Published under licence by IOP Publishing Ltd.

关键词： Transfer functions

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Determination of sustainable land resources management key factors in Musi Hydropower Plant Catchment Area of Bengkulu Province

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

作者： Sukisno Widiatmaka M Y J Purwanto B P Noorachmat K Munibah Graduate Student of Natural Resources and Environmental Management IPB University Bogor West Java Indonesia. Department of Agriculture Cultivation Faculty of Agriculture University of Bengkulu Bengkulu Indonesia. Department of Soil Science and Land Resources IPB University Bogor West Java Indonesia. Department of Civil and Environment IPB University Bogor West Java Indonesia Department of Agricultural and Bio-system Engineering IPB University Bogor West Java Indonesia.

The Subwatershed of Musi Hulu plays an important role in Bengkulu Province and the South Sumatra region. In 2006, the establishment of the Musi Hydropower Plant increases the functional load of the area hence, there is a need for sustainable land resources management. Therefore, this study aims to identify the key factors that affect sustainable land resources management in the Musi Hydropower Plant catchment area in Bengkulu Province. This research was conducted in the Musi Hydropower Plant catchment area in Rejang Lebong and Kepahiang Regency, Bengkulu Province, Indonesia. The method used was an Interpretive Structural Modelling (ISM) with four criteria, namely objectives, programs, barriers, and stakeholders of land resources management. The results showed that limited budget and weakness of coordination among stakeholders are the main barriers to sustainable land resources management in the catchment area. Meanwhile, non-governmental organization plays significant roles in supporting land resources management. Therefore, with the limited budget of land resources management, it is recommended to improve the coordination among stakeholders to maintain sustainability in the Musi Hydropower Plant catchment area in Bengkulu Province.

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Educational Tourism Potentials of Argapura Village, Bogor Regency towards Pongkor UNESCO Global Geopark

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IOP Conference Series: Earth and Environmental Science 2020年第1期501卷

作者： A A Setianata M N Aidi A Gunawan Study Program Natural Resources and Environmental Management Science Graduate School IPB University Department of Statistics IPB University Department of Landscape Architecture IPB University

Argapura is one of the village areas in Cigudeg Subdistrict which has potential unique characteristics for a tourist destination, namely Geopark. Argapura Village is one of the Pongkor National Geopark development villages covering 15 sub-districts in Bogor Regency. Pongkor National Geopark is a unitary space with geodiversity, culturediversity and biodiversity which aims to preserve and protect the wealth of natural resources. The geopark is located very close to tourism activities, but the existing tour has not specifically touched the educational aspect (educational tourism). Educational tourism is a tourism packaging program that is loaded with educational values in each of its activities. Argapura Village needs to be developed educational tourism aimed at all visitors. The objectives of this study were to identify and analyze the potential of educational tourism objects in Argapura Village, and to arrange educational tourism program in Argapura Village. Data collection through literature studies, field surveys and interviews with stakeholders. Data analysis using tables and described based on the criteria of educational values and geopark elements. The results of study showed that Argapura Village has two main potential attractions/educational tourism objects, namely Angklung Gubrag and Gudawang Caves. Angklung Gubrag is an educational tourism attraction that has high cultural, historical and religious values. Gudawang Cave is an educational tourism object in the form of karst ecosystem. In addition to the both of tourism objects, there are several other potential tourism objects and characteristics of the Geopark. The Argapura Village educational tourism was compiled includes two main programs, namely the half-day and the full-day visiting programs.

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Land priority determination for paddy field extensification in Subang Regency - Indonesia

Land priority determination for paddy field extensification ...

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International Conference on Digital Agriculture from Land to Consumers 2018, ICDALC 2018

作者： Santoso, P.B.K. Widiatmaka Sabiham, S. Machfud Rusastra, I.W. Natural Resources and Environment Management Program Graduate School Bogor Agricultural University Campus IPB Baranangsiang Bogor16144 Indonesia Department of Soil Science and Land Resources Faculty of Agriculture Bogor Agricultural University Campus IPB Darmaga Bogor16680 Indonesia Department of Agricultural Industrial Technology Faculty of Agricultural Technology Bogor Agricultural University Campus IPB Darmaga Bogor16680 Indonesia Center for Socioeconomic and Agricultural Policy Cimanggu Research Campus Tentara Pelajar Street Kav 3 Bogor16111 Indonesia

Extensification efforts in agriculture to increase paddy production can be done through the selection of land for the development of paddy fields from available land. Every inch of land has different characteristics, which can be used for the selection of land suitable for a use, including for paddy fields. This study aims to delineate available land and set priorities for the development of paddy fields in Subang Regency. The main methodology used is a multicriteria-based land evaluation. The land attribute is weighted using the AHP technique from the assessment of 8 experts. Land availability was obtained from a combination of Weighted Linear Combination method and Geographic Information System. The results of the study found suitable land for paddy field extensification. Prioritization results showed that 76,115 hectares of land had high priority, 7,165 hectares had moderate priority, 55,280 hectares had low priority, and an area of 19,561 hectares is land that is not recommended for use. The land available for extensification of paddy fields from suitable land is 9,885 hectares with a composition of 73.24% (7,240 hectares) high priority, 21.20% (2,096 hectares) moderate priority, 3.36% (530 hectares) low priority, and 0.19% (19 hectares) are not recommended for paddy field extensification. © Published under licence by IOP Publishing Ltd.

关键词： Geographic information systems

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Corrigendum to “Enhanced visible-light-driven photocatalytic degradation of acetaminophen over CeO 2 /I, K-codoped C 3 N 4 heterojunction with tunable properties in simulated water matrix” [Sep. Purif. Technol. 272 (2021) 117567]

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Separation and Purification Technology 2023年 307卷

作者： Larah Kriselle B. Paragas Van Dien Dang Rama Shanker Sahu Sergi Garcia-Segura Mark Daniel G. de Luna Jose Antonio I. Pimentel Ruey-An Doong Environmental Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City 1101 Philippines Institute of Environmental Engineering National Chiao Tung University Hsinchu 30010 Taiwan Faculty of Environment - Natural Resources and Climate Change Ho Chi Minh City University of Food Industry 140 Le Trong Tan Ho Chi Minh 700000 Viet Nam Department of Agricultural Chemistry National Taiwan University Taipei 106 Taiwan Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment School of Sustainable Engineering and the Built Environment Arizona State University Tempe AZ 85287-3005 United States Department of Chemical Engineering College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines Institute of Analytical and Environmental Sciences National Tsing Hua University Hsinchu 30013 Taiwan

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Enhancing human resilience beyond COVID-19-related stress: public responses to multi-benefits of home gardening

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Scientific Reports 2023年第1期13卷 1-12页

作者： Wu, Chen-Fa Trac, Luu Van Thong Chen, Szu-Hung Menakanit, Alisara Le, Quoc Tuan Tu, Hung-Ming Tsou, Chih-Peng Huang, Hsi-Chih Chookoh, Nittaya Weng, Chih-Cheng Chou, Li-Wei Chen, Chiu-Chuan Department of Horticulture National Chung Hsing University Taichung City 402 Taiwan Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung City 402 Taiwan International Master Program of Agriculture National Chung Hsing University Taichung City 402 Taiwan Department of Horticulture Kasetsart University Bangkok 10900 Thailand Department of Environmental Sciences Faculty of Environment and Natural Resources Nong Lam University - Ho Chi Minh City Ho Chi Minh City 700000 Viet Nam Miaoli Management Office Irrigation Agency Council of Agriculture Executive Yuan Miaoli County 360 Taiwan Department of Physical Medicine and Rehabilitation China Medical University Hospital Taichung 404332 Taiwan Department of Physical Therapy and Graduate Institute of Rehabilitation Science China Medical University Taichung 406040 Taiwan Department of Physical Medicine and Rehabilitation Asia University Hospital Asia University Taichung 413505 Taiwan Department of Landscape Architecture Chung Chou University of Science and Technology Changhua County 510 Taiwan

The SARS-CoV-2 virus has caused a public health crisis globally. Against the backdrop of global resilience, studies have demonstrated the therapeutic value of home gardening as a measure to strengthen human health. However, there is a lack of comparative studies on its benefits across countries. Studies need to examine the role of home gardening in improving public health in various societies to understand and encourage this practice broadly and effectively. We chose Taiwan, Thailand, and Vietnam as case studies, which have suffered substantial pandemic impacts, with millions of infections and thousands of deaths. We explored and compared the perceptions of people on home gardening and its health benefits during the COVID-19 pandemic. We conducted online surveys in three countries between May 1 and September 30, 2022, with a total of 1172 participants. Data were collated on perceived pandemic stress, challenges and solutions in gardening, home gardening intentions, and mental and physical health benefits. In these countries, we found that perceived pandemic stress positively affects home gardening intentions, whereby the motivation of Vietnamese people is the highest. Challenges hinder gardening intentions, while the solutions only positively affect gardening intentions in Taiwan and Vietnam. Home gardening intentions positively affect mental and physical health, whereby there are higher mental health benefits in Taiwanese people than in Thai people. Our findings potentially support public health recovery and promote healthy lifestyles during the COVID-19 pandemic. © 2023, The Author(s).

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Potential anti-biofilm producing marine actinomycetes isolated from sea sediments in Thailand

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Agriculture and natural resources 2018年第3期52卷 228-233页

作者： Leetanasaksakul, Kantinan Thamchaipenet, Arinthip Department of Genetics Faculty of Science Kasetsart University Bangkok 10900 Thailand Interdisciplinary Graduate Program in Genetic Engineering Graduate School Kasetsart University Bangkok 10900 Thailand Center for Advanced Studies in Tropical Natural Resources Kasetsart University Bangkok 10900 Thailand

Marine actinomycetes are well known as novel resources of bioactive compounds including anti-biofilm agents with various therapeutic applications. In this study, one hundred and one marine actinomycetes were isolated from sea sediments collected from Andaman sea and the Gulf of Thailand. Morphological study and partial 16S rDNA sequence analysis revealed that most of isolates belong to genus Streptomyces (n = 90, 89.11%) and the rest are rare actinomycetes (n = 11, 10.89%) including Actinopolymorpha, Actinomycetospora, Dietzia Nocardiopsis, Micromonospora and Mycobacterium. Among them, ten and thirteen strains significantly reduced more than 60% of biofilm formation of Escherichia coli and Staphylococcus aureus, respectively. But no such activity was found against Pseudomonas aeruginosa. Further analysis of their supernatants indicated that most of marine actinomycetes secreted non-toxic anti-biofilm agents and some accompanied with protease activity. These are preferred characteristics of anti-biofilm substances that potentially restricted biofilm forming of E. coli and S. aureus and simultaneously prevented bacteria to develop resistance. © 2018 Kasetsart University

关键词： Anti-biofilm Marine actinomycetes

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