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The effect of Street canyon width towards wind flow in between high-rise buildings

IOP Conference Series: Materials Science and engineering 2020年第1期930卷

作者： Y Sanjaya D Priambodo P W Sarli H D Setio Programmed Study of Civil Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Bandung Indonesia

Wind load is often defined as a static uniform distributed load in the design code, especially on small structures such as billboard, pedestrian cross bridge, etc. However, as a fluid, wind can deform from a laminar flow to a turbulence flow or it can also be amplified if enough disturbance around the object exists. If these small structures are not designed for a dynamic load or the corrected amplified load, it will collapse. This study aims to investigate the effect of street canyon width towards wind flow by observing a simplified model of 4 symmetrical high-rise buildings with changing street canyon width. The numerical model uses CFD with RANS in OpenFOAM v1912 which is validated with experimental results using a low wind speed wind tunnel and Particle Image Velocimetry (PIV). An Experiment has been performed in BBTA3 using a model with 1:420 scale, there are 2 models with different street canyon width. The result showed there is an increment of the mean wind speed about 5.92-20.20%.

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Assessment of safety performance level on simple urban residential building: Case study at Bogor city Indonesia

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IOP Conference Series: Materials Science and engineering 2020年第1期712卷

作者： M Lutfi H Arien M Hendrawati P J Ramadhansyah N I Ramli Civil Engineering Study Program Faculty of Engineering & Science Ibn Khaldun University 16162 Bogor Indonesia Institute for Research and Community Services Ibn Khaldun University 16162 Bogor Indonesia Student of Civil Engineering Study Program Faculty of Engineering & Science Ibn Khaldun University 16162 Bogor Indonesia Faculty of Civil Engineering Technology Universiti Malaysia Pahang 26300 Gambang Pahang Malaysia

Simple urban residential building must meet the technical requirements set forth in the building and structure law number 28 of 2002. In the city of Bogor, especially in the densely populated village of Kayumanis, there are areas that have the potential of landslides. In that area, there are some houses that have been damaged by the movement of land and landslides that can threaten the safety of its inhabitants. Therefore they need to stay aware about potential collapse of several parts of house structures, and then understand how to evacuate to safer area, outside of the house after the incident was stopped. Based on these conditions, it is necessary to evaluate buildings in accordance with FEMA on the safety level of buildings. The structure and modeling analysis using SAP 2000-V10 and Indonesia Standard. Specification of simple urban residential building using the reinforced concrete material with the quality of concrete (fc') 17 MPa, 15x15 cm column dimension, 15x18 cm beam dimension and 4D12 BJTP main reinforcement, and shear reinforcement D8-20. The results of the analysis of urban residential building structures shown in 3D form, obtained values for column structure elements almost close to failure are marked with orange color, while for the element of the beam structure is declared safe marked with green color. From result of modeling analysis referring to FEMA 356 obtained value C0 = 1.0; C1 = 1.378; C2 = 1.0; C3 = 1.0; Sa = 1.011; and Te = 0.2206, which states the value of the displacement target is 0.02 m which is categorized to be at 'The Life Safety' (LS) performance level. This means that if there is a movement of land, the structure of the house is declared stable and has adequate service capacity and damage non-structural part is still controlled.

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Remote sensing & GIS integration for monitoring the areas affected by forest fires: A case study in Izmir, Turkey

Remote sensing & GIS integration for monitoring the areas af...

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2018 Geoinformation for Disaster Management Conference, Gi4DM 2018

作者： Çolak, E. Sunar, A.F. ITU Civil Engineering Faculty Geomatics Engineering Graduate Program Maslak Istanbul80626 Turkey ITU Civil Engineering Faculty Geomatics Engineering Department Maslak Istanbul80626 Turkey

A forest fire is stated as an ecological disaster whether it is man-made or caused naturally. Izmir is one of the regions where forest fires are most intensified in Turkey. The study area located at Aegean region of Turkey suffered two forest fires in 2017;Menderes and Bayindir areas. This study presents the integration of remote sensing (Sentinel 2 and Landsat 8 satellite images) and GIS data to map and evaluate the forest burned areas due to both forest fires. For this purpose, different indexes such as Burn Area Index (BAI), Mid Infrared Burn Index (MIRBI), Normalized Burn Ratio (NBR) and Normalized Burn Ratio Thermal (NBRT) Burn Index are applied besides different classification algorithms. The results showed that different vegetation types/zones are being affected. Sentinel 2 and Landsat 8 data are integrated to the GIS established with fieldwork data to analyse and also validate the results. Digital Elevation Model (DEM) data produced from ASTER satellite is also overlaid to the outcomes to emphasize the destructed forest areas. The efficiency of using two different satellites are outlined by comparing the accuracy of forest fire maps produced. © Authors 2018. CC BY 4.0 License.

关键词： Landsat

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Role of bedrock serpentinization on the development of nickel laterite deposit in Sorowako, Sulawesi, Indonesia

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IOP Conference Series: Earth and Environmental Science 2021年第1期921卷

作者： U R Irfan A. Maulana F Muhammad Geological Engineering Department Faculty of Engineering Universitas Hasanuddin Jl. Malino Km. 6 Gowa 92171 South Sulawesi Indonesia Geological Engineering Study Program Faculty of Engineering Universitas Hasanuddin Jl. Malino Km. 6 Gowa 92171 South Sulawesi Indonesia

The objective of this research is to analyze the role of bedrock serpentinization on the development of Ni-Laterite deposits in Sorowako, Sulawesi Island, Indonesia. Samples were obtained from coring data in three areas, namely the West Block, East Block, and Petea, which are subject to mineralogical and geochemical analyses. Petrography of the bedrocks was conducted to analyze the mineral composition, texture, and serpentinization degree, and later correlated with the distribution of geochemical elements from X-ray fluorescence method in each laterite zone. The bedrock in the West Block is dunite which consists of predominantly olivine with low degree serpentinization. The bedrock in the East Blocks and Petea consists of peridotite in the form of lherzolite and harzburgite which have been moderate to highly serpentinized. The distribution of elements in each block shows that MgO, SiO2, and Ca elements significantly decrease towards the upper laterite profile while Fe, Al, and Cr are enriched in the limonite zone and Ni, Mn, and Co are significantly enriched in the saprolite zone. Ni, Fe, SiO2, Cr, MgO, and Mn in the West Block are relatively higher than the East Block and Petea. This study shows that Ni content is relatively higher in West Block compare to East Block and Petea in averages of 1.7%, 1.53%, and 1.3%, respectively. Olivine-rich bedrock and a low degree of serpentinization resulted in high-Ni concentration in the laterite profile, particularly in the saprolite layer. This means that bedrock characteristics and degree of serpentinization were responsible for the development of nickel.

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Forecasting model of power generated by wind power plants

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IOP Conference Series: Earth and Environmental Science 2021年第1期926卷

作者： A M Ilyas A Suyuti I C Gunadin S M Said Electrical Department Engineering Faculty University of Hasanuddin Jl. Perintis Kemerdekaan Km. 10 Makassar 90245 Indonesia. Electrical Engineering Study Program Engineering Faculty Khairun University Kelurahan Gambesi 97719 Ternate North Maluku Indonesia.

The power generated by wind power plants is unstable so forecasting is needed to maintain the power balance in an interconnected system. The purpose of this research is to predict the power generated at the Sidrap and Jeneponto wind power plants. The method used is an optimally pruned extreme learning machine (OPELM). The extreme learning machine (ELM) method is used as a comparison method. The mean absolute percentage error (MAPE) method is used to assess the level of forecasting accuracy. Forecasting power generation with Sidrap wind power plant data using the OPELM method is 0.8970% more accurate than the ELM which is 1.0853%. In general, the OPELM method is more accurate. Forecasting power generation with data from the Jeneponto wind power plant using the OPELM method is 2.4887% more accurate than the ELM method is 2.9984%. These results indicate that linear, sigmoid, and Gaussian activation in the OPELM method can increase accuracy. The OPELM method can be tested in forecasting the power generation at the Sidrap and Jeneponto wind power plants to maintain a power balance in the Sulselbar power grid system.

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Environmental management for small medium electroplating industry, A Cleaner production approach

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IOP Conference Series: Materials Science and engineering 2021年第1期1053卷

作者： A D P Citra H D Iswandari P Purwanto Study Program of Optometry Universitas Widya Husada Semarang Semarang Indonesia Universitas Widya Husada Semarang Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia

Small and medium scale electroplating industry produces a variety of plating products by using hazardous substances as raw materials. The production process at SMI electroplating held manually. Industrial environmental management is conducted by implementing clean production starting from waste prevention, reduction and recycling. Research is conducted in the field through observation and review of actions to reduce process failures and improve them. The success of implementing clean production as an environmental management effort can be extended to other SMIs.

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Prediction of the activity of carbohydrate moiety of bromelain as immunomodulator using an in silico approach

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AIP Conference Proceedings 2023年第1期2480卷

作者： Trina Ekawati Tallei Fatimawali Afriza Yelnetty Nurdjannah Jane Niode Diah Kusumawaty Billy Johnson Kepel Souvia Rahimah Yunus Effendi Rinaldi Idroes Sefren Geiner Tumilaar Shafi Mahmud Talha Bin Emran Department of Biology Faculty of Mathematics and Natural Sciences Sam Ratulangi University Manado 95115 North Sulawesi Indonesia Pharmacy Study Program Faculty of Mathematics and Natural Sciences Sam Ratulangi University Manado 95115 North Sulawesi Indonesia Animal Products Technology Study Program Faculty of Animal Husbandry Sam Ratulangi University Manado 95115 North Sulawesi Indonesia Department of Dermatology and Venereology Faculty of Medicine University of Sam Ratulangi RD Kandou Hospital Manado 95163 North Sulawesi Indonesia Department of Biology Education Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia Bandung 40154 Jawa Barat Indonesia Department of Chemistry Faculty of Medicine Sam Ratulangi University Manado 95115 North Sulawesi Indonesia Food Technology Study Program Department of Food Industrial Technology Faculty of Agroindustrial Technology Universitas Padjadjaran Jatinangor 45363 West Java Indonesia Biology Study Program Faculty of Science and Technology Universitas Al Azhar Jakarta 12110 Indonesia Department of Pharmacy Faculty of Mathematics and Natural Sciences Universitas Syiah Kuala Kopelma Darussalam Banda Aceh 23111 Indonesia Microbiology Laboratory Department of Genetic Engineering and Biotechnology University of Rajshahi Rajshahi 6205 Bangladesh Department of Pharmacy BGC Trust University Bangladesh Chittagong 4381 Bangladesh

Bromelain is a glycoprotein that contains a single carbohydrate moiety group and displays proteolytic activity. Bromelain has long been known to act as an immunomodulator; however, the immunomodulatory activity of its carbohydrate moiety has been very rarely studied and is not well understood. This study aimed to predict the immunomodulatory activity of the carbohydrate moiety of bromelain (CMB) by evaluating it using the PASS server, and the binding affinities between CMB and various pro-inflammatory cytokines were analyzed using a molecular docking approach. This research was conducted by docking the CMB ligand to the following receptor proteins: interleukin-6 (IL-6), IκBβ/nuclear factor (NF)-κB p65 homodimer complex (IκBα/NF-κB p65), tumor necrosis factor-alpha (TNF-α), and IL-1β. The biological potential of CMB was predicted using the online PASS server. The results of the computational analysis indicated that the highest binding energy was identified between CMB and IκBβ/NF-κB p65 (−10.3 kcal/mol), followed by TNF-α (−9.7 kcal/mol), and IL-6 and IL-1β, with values of −8.2 kcal/mol for both. The CMB activity predicted by the Way2Drug PASS server indicated that this molecule is likely to display significant immunostimulant activity. These findings suggested that CMB can be considered a potential lead molecule for further drug development to identify agent that can prevent or cure inflammation and restore balance to the immune system. However, the predictions determined in this study remain to be validated in future in vitro and in vivo studies.

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Biosorption of Lead (II)-containing Sasirangan Textile Wastewater using Nanocomposites of Eleocharis dulcis Fibers with Iron (III) Nanoparticles as Adsorbent 24

Biosorption of Lead (II)-containing Sasirangan Textile Waste...

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24th Regional Symposium on Chemical engineering, RSCE 2017

作者： Irawan, Chairul Nata, Iryanti F. Putra, Meilana D. Ristianingsih, Yuli Chemical Engineering Study Program Engineering Faculty University of Lambung Mangkurat Banjarbaru South Kalimantan70714 Indonesia

This research focuses on the study of biocomposite nanoparticles of Eleocharis dulcis (ED) as potentials biosorbent to reduce the concentration of lead (II) ion containing Sasirangan textile industry wastewater. Eleocharis dulcis, locally named as Purun Tikus, has been developing becomes the biocomposites nanomaterial and valuables material in this research. Batch experiments were carried out to considering the kinetic of biosorption of lead onto the adsorbent, evaluating the effects of lead ion equilibrium concentration, equilibrium pH, and temperature on the adsorption of lead (II). Kinetic data of lead (II) biosorption onto EDB and EDB-MH revealed that equilibrium time was reached within 2 h, and the isotherm data showed that the Langmuir maximum adsorption capacity of the EDB-M and EDB-MH at pHe of 6±0.2, room temperature were 150.43 mg/g and 180.92 mg/g, respectively. The thermodynamic of lead (II) biosorption onto the adsorbent implied the biosorption was spontaneous and endothermic indicating by increased in temperature would increased in adsorption capacity. © The Authors, published by EDP Sciences, 2018.

关键词： Biosorption

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Baseline waste management data in North Lombok District

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IOP Conference Series: Earth and Environmental Science 2021年第1期802卷

作者： A Simorangkir N Citrasari S Hariyanto A Widyastuti Undergraduate Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia Study of Biology Program Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia

An integrated waste management system requires baseline data, including waste generation analysis, composition density, and waste characteristics. Baseline data is needed to determine the proper waste management strategy. This research was conducted by measuring directly from the source of waste carried out by stratified sampling following SNI 19-3964-1994. The location of the study was carried out in Tanjung and Gangga districts because this location is considered to represent North Lombok Regency. The research was conducted using 100 samples of household waste. The study results on the composition of waste in the North Lombok Regency consisted of organic waste, plastic waste, paper, cloth, wood, glass, metal, and rubber waste. The dominant composition is organic waste. The characteristics of waste in the North Lombok Regency have a higher water content than the water content of waste in general. All the characteristics tested indicate that the waste in North Lombok Regency requires several treatments before processing waste, such as reducing the water content and increasing the C/N ratio. Based on the characteristics and composition of the waste, composting or incineration is the suitable waste management method in North Lombok Regency.

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Ambient air monitoring of nitrogen dioxide at Kalimati, Tirtomartani, Kalasan, Sleman, Yogyakarta 2

Ambient air monitoring of nitrogen dioxide at Kalimati, Tirt...

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2nd International Conference on engineering and Technology for Sustainable Development, ICET4SD 2017

作者： Supriyanto Suci Ramadhani, Indah Environmental Engineering Department Faculty of Civil Engineering and Planning Universitas Islam Indonesia Jl. Kaliurang 14 Yogyakarta55584 Indonesia Study Program of Environmental Engineering Faculty of Civil Engineering and Planning Universitas Islam Indonesia Jl. Kaliurang 14 Yogyakarta55584 Indonesia

Nitrogen dioxide (NO2) is one of parameters in air quality according to Indonesia Government No. 41/1999. NO2 has influence in respiratory problem of human being if it exceeds threshold level (400 μgNO2/Nm3). This study is air monitoring of NO2 concentration in ambient air and it uses a Griess Saltzman method using the spectrophotometer (Indonesia Standard SNI 19-7119.2-2005) near of Plywood Industry and Main Road. The sampling location has two points at Kalimati Village, Tirtomartani, Kalasan, Sleman, D.I Yogyakarta. On December 2016, the results show which NO2 concentration is below threshold level with 0,469 μg NO2/Nm3 at first point and 0,234 μg NO2/Nm3 at second point. © The Authors, published by EDP Sciences, 2018.

关键词： Nitrogen oxides

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