bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of inelastic behaviour steel structure of special moment frame (SMF) and eccentrically braced frame (EBF) with pushover analysis
Authors: Mentari S 
Published: January 2021

Abstract
High rise buildings should be made as sufficient seismic performance, so it won’t immediately collapse when an earthquake occurs. Therefore, lateral strengthened stories are required in high rise buildings to enhance the lateral rigidity of structure. The use of lateral strengthening has a great effect on the entire seismic performance. A 20-stories high rise steel structure building was evaluated on this research comparing the structures’ inelastic behaviour using two seismic force-resisting system, i.e., special moment frame and eccentrically braced frame. The analysis of inelastic behaviour in this research using static non-linear analysis, i.e., pushover analysis. By using pushover analysis, the inelastic behaviour of structures, including story drift, shear story, displacement, plastic joint formation, and ductility, were obtained. In the elastic condition, the shear story of the eccentrically braced frame system is smaller than the special moment frame system. While in plastic condition, the shear story of the eccentrically braced frame system is larger than the special moment frame system. The story drift and the displacement of the special moment frame system are indicated to be larger than the eccentrically braced frame system. These results show that the eccentrically braced frame system has better rigidity than the special moment frame system.
Comparison of bearing capacity pile foundation base on pile dynamic analyzer test and conventional analysis (Case on foundation bridge in Cikampek)
Authors: Somantri A K , Tarigan P J S 
Published: January 2021

AbstractThe foundation as the base of construction work must be able to bear the structural load from above and carry it down. Thus, the foundation analysis needs to be done for designed and build to determine the stability value of the foundation due to load and deformation. This research will be carried out in two different ways: analyzing PDA test results and calculating the bearing capacity of the foundation using Mayerhoff, Poulos Davis and Tomlinson’s method. Those two different ways will have resulted in a comparison of dynamic analysis. So it can be concluded through the regression results that will be determined in a linear and logarithmically. Based on the Mayerhoff method, bearing capacity regression values linearly ranged from 0.77 to 0.86 while logarithmically is 0.8. For the Paulos Davis method, the linear and logarithmic regression values range between 0.7 to 0.88. The Tomlinson method produces regression values ranging from 0.65 to 0.88 in a linear and logarithmic. This study shows differences in the value of regression from various conventional analyzes that have been carried out.
Effect of heat curing on early strength of high-performance mortar containing ferronickel slag as cement replacement
Authors: Edwin R S , Kimsan M , Pramono B , Masud F 
Published: January 2021

Abstract
High-performance mortar (HPM) is a new material in construction projects which requires a huge amount of cement on its production. As a consequence, the cost of this material will increase. This problem can be solved by utilizing alternative binders combined with the latest curing technology to obtain a low cost of HPM without loss of quality. This study aims to examine the effect of heat curing on the compressive strength of HPM containing FNS as cement replacement in early days (7 days). The FNS was ground using a ball mill to achieve a fineness similar or higher than cement. A low water-to-cement ratio of 0.35 was chosen in this research. The series of HPM mixtures containing FNS used in this study were 0%, 5%, 10%, 15%, 20% and 30%. Heat curing at 75 °C was used to assess the performance of the HPM compared to normal curing. The particle size distribution of binders was determined using a laser diffractometer. The results showed that the presence of FNS in the HPM had a positive effect on the compressive strength at 7 days after applying heat curing. The use of heat curing at 75 °C increased the strength of HPM at 7 days.
Application of soybean powder as urease enzyme replacement on EICP method for soil improvement technique
Authors: Pratama G B S , Yasuhara H , Kinoshita N , Putra H 
Published: January 2021

Abstract
Many researchers have confirmed the application of calcite precipitation method by urease enzyme induction as a potential soil improvement technique. However, this method needs an expensive investment due to the urease enzyme issue. The enzyme itself brings 90% of the total materials cost. It means that finding new inexpensive material for replacing the enzyme is considered essential for the development of this method. In this study, a potential material, which is soybean powder, was evaluated through several experimental tests. A comparison of urease activity value between EICP using soybean powder and commercial urease as a catalyst for hydrolysis of urea compound was made through a series of conductivity tests. It was found that EICP using soybean urease can be a potential alternative to a commercial product in terms of urease activity. The precipitation materials were analysed using a microscale test to analyses the minerals type. Besides, the reinforcing effect of EICP solution on soil specimens was evaluated by conducting unconfined compressive strength (UCS) test and acid leaching test. The results of the UCS test were indicated that the soybean powder is a potential material to be used in soil improvement technique.
Identification of non-volcanic geothermal manifestation in North Konawe Regency Indonesia using land surface temperature of Landsat satellite image
Authors: Jaya L M G , Suprayogi A , Sudarsono  , Hasbi M 
Published: January 2021

Abstract
Energy needs are increasing from year to year. However, in many countries, fossil energy is utilized in a large portion even though the country has a lot of potential for new and renewable energy. Geothermal is renewable energy has an important role in Indonesia besides other potential renewable energy such as water, wind, solar, and ocean tidal. This study aimed to identify non-volcanic geothermal manifestation in North Konawe Regency, South East Sulawesi Province, based on Landsat Enhanced Thematic Mapper (ETM) remote sensing satellite image. Land Surface Temperature (LST) method was conducted using thermal band processing of Landsat ETM. For this purpose, the single-window algorithm was applied. Validation was also conducted through a ground survey. The result of this study showed that at least two geothermal manifestations were founded in two separate locations in Wawolesea village and Toreo respectively. From the LST analysis, we found that the temperature reached 26.35 to 37.42 Celsius Degree in both locations, where hot water spring as geothermal manifestation exist. According to the ground check, the temperature correlation between in situ and LST is enough which R2=0.5155.
Rainfall modeling based on early predicted and season zone characteristic in the BMKG season zone over Lombok river basin
Authors: Noviadi S C 
Published: January 2021

AbstractPlanning water resources for long-term (annual, monthly) and operational (daily) requires a more accurate analysis of water availability calculations. The Meteorology, Climatology and Geophysics Agency (BMKG) publishes bulletin of forecasting every year in the form of the early wet season and the characteristics of the wet and dry season in each Season Zone (ZOM). BMKG conducts analysis and forecasting with complex climate parameters. Thomas Fiering analysis with the help of Excel Visual Basic Application (VBA) software is used to forecast rainfall at each rainfall station in BMKG Season Zone. The average error of forecasting rainfall during the wet season on the BMKG season zone in 2015/2016, 2016/2017 and 2017/2018 were 20%, 30% and 26%. While the average error for the dry season on the BMKG season zone is 44%, 34% and 52%. The existence of this deviation is caused by several factors including the uncertain season changes every year, as well as the influence of “El Nino.”.
Design and implementation of solar pump irrigation systems for the optimization of irrigation and increase of productivity
Authors: Rejekiningrum P , Apriyana Y 
Published: January 2021

Abstract
The irrigation solar water pump system is a technological innovation using water pumps that are more efficient and economical. The aims of this study are: (1) to design an efficient solar pump irrigation system for shallots and red chili, and (2) to measure the irrigation efficiency of the solar pump irrigation system. The configuration of the solar water pump irrigation system should be determined on the basis of (1) the pump performance curve, (2) the irrigation system performance curve and (3) the pump discharge and the operating pressure curve. Our results show that the operational duration of the pump for 7.59 hours/day in Playen Sub-District, Gunungkidul was able to irrigate 2,333 m2, while in Imogiri Sub-District, Bantul a regime of 5.42 hours/day could irrigate 3,630 m2. Irrigation techniques using Impact Sprinklers for shallots and Streamlines for red chili, when combined with mulch could increase the growth and yield of shallots and red chili crops compared to the patterns and methods practiced by farmers. The efficiency of the solar water pump irrigation system should be further improved by a more detailed calculation of water supply pumping power calculation in order to increase the planting capacity of farm.
Developing IT infrastructure of evaporative irrigation by adopting IOT technology
Authors: Arif C , Setiawan B I , Saptomo S K , Taufik M , Wiranto  , Mizoguchi M 
Published: January 2021

AbstractThe primary key to the modernization of irrigation is the effectiveness of agricultural water use that should be supported by good infrastructure, including information technology (IT). The objective was to evaluate the performance of IT infrastructure in collecting weather data for evaporative irrigation. The system was set up under a natural environment since 10 July 2020 in the Kinjiro Farm, Bogor. The system consisted of three parts, i.e., integrated sensors suite (ISS), console (data logger), and the server, including the dashboard system. The ISS involved several sensors, namely:Pyrsolar radiation, rain gauge, air temperature, and humidity sensors, together with wind speed and direction. All data were collected through the console and data logger and then transferred into a local computer server to the dashboard system using an internet connection. The users can access all data from the dashboard system as numerical and graphical data. The system showed a reliable performance, as all data were well properly sent to the server every 30 minutes. The weather parameters, including rain events, were correctly monitored every 30 minutes. All observed data were found to directly affect the reference evapotranspiration, a parameter that will be used for further consideration in determining irrigation scheduling.
The effect of chlorpyrifos exposure on carp fish at twin lakes of West Sumatra Indonesia
Authors: Ihsan T , Edwin T , Paramita D , Frimeli N 
Published: January 2021

Abstract
This study was conducted to analyze the sublethal effect of chlorpyrifos on the Feed Conversion Ratio (FCR), Sustainable Growth Rate (SGR), and carp behaviors. The concentration used 1/7 and 1/14 of the LC50 carp. The study was conducted with the number of fish per aquarium was five fishes, and the testing exposure time was 14 days. The results of the FCR and the SGR at a concentration of 1/7 and 1/14 LC50 was 0.2907 and 0.3031, and 1.551% and 1.9581%, respectively. Changes in behavior during exposure, a decline in appearance such as being alone in the corner of the aquarium, moving irregularly and stress (r = 0.75-1), lots of mucus (r = 0.800-1), anal excretion (r = 0.6-0.799), and breathe to the surface (r = 0.800-1). This situation happened because chlorpyrifos begins to affect the nervous system of carp to reduce other body functions. The FCR and SGR had a significant effect through the statistical test due to the chlorpyrifos concentration. Whereas in carp’s physiological behavior changes, there was no significant effect due to the level of concentration provided.
Prediction of land cover changes in Penajam Paser Utara Regency using cellular automata and markov model
Authors: Permatasari R J , Damayanti A , Indra T L , Dimyati M 
Published: January 2021

Abstract
Development and economic growth in an area can cause land cover changes. Penajam Paser Utara Regency, as a new capital candidate, is also predicted to experience in land cover changes. Land cover changes that are not following the land’s potential will cause environmental problems, so it is necessary to predict land cover changes by looking at patterns of land cover changes in the past and the factors that influence it. The purpose of this study is to analyze and predict the land cover change in Penajam Paser Utara Regency in 2031. The method used in this study is modeling using Cellular Automata - Markov. The driving factor of land cover change is used in making prediction models such as distance from the center of activity, distance from the road, distance from the river, elevation, and slope. The prediction land cover changes show that there has been an increase in plantation area and a decrease in forest area, while the development of the built-up area is not visible. The kappa test for predicted land cover showed perfect results. The resulting land cover model can be used to formulate land-use policies.
Investigation of air pollution dispersion from kiln stacks based on seasonal using multi-model integration (WRF/CALPUFF)
Authors: Pratama A 
Published: January 2021

Abstract
Air pollution is one of the environmental problems that have a bad impact on human life. Air pollution sources come from various sources such as industry, mining, transportation activities, etc. This study aims to identify the seasonal dispersion of Sulfur Dioxide produced by kiln stacks in PT Semen Padang, Tbk. The Dispersion model used in this study is CALPUFF (For air pollution model) integrated with WRF (Weather Research Forecasting) (For meteorological model). CALPUFF requires the wind field generated by the CALMET model and the WRF model. From the simulation, the direction of SO2 dispersion on the wet season and the dry season is influenced by meteorological phenomena such as sea breeze and land breeze. The dispersion of Sulfur Dioxide in the dry season passes the urban area more than in the wet season, with the highest concentration is 122 µg/m3. On the other hand, in the wet season, the highest concentration is 120 µg/m3. These results are below of national quality standard in Indonesia (365 µg/m3). The statistic also shows that the correlation and error (RMSE) between the model and observed data are 0.63 and 5.49 in the wet season, whereas the correlation and error (RMSE) in the dry season are 0.74 and 2.89.
Analysis of multimedia filter effectiveness to improve the quality of rainwater runoff in fulfilling urban raw water supply
Authors: Oktaviani A , Suwartha N 
Published: January 2021

AbstractRainwater is recommended as a clean water supply through several water treatment methods. Based on preliminary data test results, several parameters exceed the sanitary hygiene water standard. This research aimed to improve the quality of rainwater runoff using the multimedia filter, which combined filtering and physical adsorption process. The combination of silica sand, activated carbon, and zeolite media was simulated into a pilot-scale of 1:2 reactor. Based on the first experimental results, the use of proposed media has a significant effect (p-value≅0) on several parameters. The best improvement in effluent quality reaches 100% in nitrites removal, 29% in nitrates removal, and 94.4% in total coliform removal. However, the media thickness variation factor has an insignificant effect (p-value 0.616) to effluent quality. Based on the second experiment results, hydraulic loading rate (HLR) variation shown a significant effect (p-value 0.01) on several parameters. Effluent quality improvement reaches 71.4% in nitrites removal, 100% in nitrates removal, and 91.9% in total coliform removal. However, variation in HLR gave an insignificant effect (p-value 0.769) on improving effluent quality.
Novel helical or coiled flocculator for turbidity reduction in drinking water treatment: a performance study
Authors: Cahyana G H , Suwandhi P , Mulyani T 
Published: January 2021

Abstract
Helical or spiral coiled flocculator have not been applied in drinking water treatment yet in Indonesia. Only a few articles discussed it with different themes like hydrodynamic, floc characteristics, and performance. This study was done to know the efficiency (performance) of helical flocculator with parameters velocity gradient, pipe, helical diameter, flowrate, detention time, and coagulant dose. The study was divided into two steps: Jar test to determine the optimum dosage of coagulant and flocculation experiments to evaluate the helical flocculator efficiency. Efficiencies were in the range of medium to high. On flowrate, 13 ml/second was obtained good results for two pipe sizes but different in helical diameters. In a 0.5 inch pipe with 0.8 m helical diameters, the turbidity reduction efficiencies were 72.4% and 73.9%, and sediment volume was 18.3 ml and 20.0 ml. In a 0.625 inch pipe with 0.4 m helical diameters, the turbidity reduction efficiencies were 76.7% and 78.5%, and sediment volume was 14.3 ml and 19.7 ml. The optimum velocity gradient about 64.9–69.6 per second, and detention time about 438–649 seconds. The results showed that helical flocculator was effective for floc formation. Flowrate, pipe diameter, helical diameter were three key parameters to perform helical flocculator.
Analysis of performance and testing of 1215 WP rooftop solar power plants with on-grid system household scale with the case study of Sambiroto Asri Housing Semarang City
Authors: Windarta J , Denis  , Silaen J S , Satrio D A 
Published: January 2021

AbstractThis research is conducted to examine the on-grid system to the solar module and analyze the consequences of on-grid solar power plant implementation towards the daily electrical energy consumption. The data retrieval is conducted for three days, from 29thto 31stJuly 2020 and this research provides real-time data by considering the weather conditions of each day. According to the result, the solar module has an efficiency value of 15.13%. This value is lower than the nameplate due to the higher solar module surface temperature than the optimal operating temperature. Subsequently, based on the implementation impact analysis, it is stated that on-grid system implementation in the solar power plant could produce electrical energy of 4.32 kWh. It is also found that the daily output of on-grid system implementation in a solar power plant could operate the load of 1.86 kWh and it could export the electrical energy to the grid of 2.46 kWh. In this way, the system could use a load of 2.45 kWh and export electrical energy of 1.87 kWh to the grid on the weekend. Therefore, it can be concluded that a solar power plant with an on-grid system could export the electrical energy to the grid.
Personal characteristic, occupational, work environment and psychosocial stressor factors of musculoskeletal disorders (MSDs) complaints on bus driver: literature review
Authors: Zulkarnain M A , Setyaningsih Y , Wahyuni I 
Published: January 2021

Abstract
Musculoskeletal disorders (MSDs) complaints is an accumulation of injuries and pain in the musculoskeletal system. It is characterized by injuries on muscles, tendons, cartilages, ligaments, and vascular and nervous structures. Bus drivers are high-risk workers that experience MSDs complaints. MSDs on bus drivers can disrupt drivers’ performance, endanger drivers, passengers, and public road users. This study aims to review the literature on factors of MSDs complaints among bus drivers. The literature review method is used by compilation, tabulation, comparing the research results, and then summarizing it. The research was obtained from an accredited journal site (PubMed, Research Gate, Science Direct, Scopus) and the google scholar journal search page. After searching for keywords and screening with the research inclusion criteria, 15 studies were obtained. It was found that smoking habits, age, years of work, driving duration, work posture, vibration, work stress, and job dissatisfaction were the main factor of MSDs complaints on the bus driver. Several studies also show that bus drivers with a low level of physical activity, long driving duration, high driving frequency, unergonomic seats, feelings of anxiety and confusion during driving had a higher risk for experiencing MSDs complaints.
Metal industry waste desiccation behavior with the addition of bentonite as a landfill liner
Authors: Ramadan B S , Alfanti L K , Sutrisno E , Budihardjo M A , Wardhana I W , Yumaroh S 
Published: January 2021

Abstract
The existence of garbage in the environment can cause pollution. Therefore, it is necessary to carry out waste management, one of which is by building a landfill. Landfill liner should have a permeability coefficient <10−6 cm/sec to prevent contamination. Currently, the affordable material used as landfill liner is clay, but it is quite rare. An alternative material we can use is metal industrial waste, which has not been utilized. Metal industrial waste has a permeability coefficient, namely 25.34560 x 10−6 cm/s. In order to reduce the permeability coefficient value, metal industrial waste is added with bentonite material, which has a low permeability value with variations of 0%, 5%, 10%, 15%, 20%, and 25% addition of bentonite. Digital image processing techniques are used to calculate crack intensity factor (CIF) values using the Matlab 2019 software. The results showed that the permeability value that fulfilled was the variation of 20% bentonite addition of 0.8059 x 10−6 cm/s and 25% of 0.5059 x 10−6 cm/s. While the CIF results showed that only the variation of 25% bentonite addition were not eligible because they had a crack area >4%. Thus it can be concluded that the best composite is metal industrial waste with 20% bentonite.
Electrocoagulation for drinking water treatment: a review
Authors: Al-Hanif E T , Bagastyo A Y 
Published: January 2021

Abstract
In this era, raw water pollution often occurs, and conventional processing can sometimes not treat it. Raw water as a water source for drinking water has to meet physical, chemical, and biological parameters in accordance with a predetermined standard. One of the parts of the advanced electrochemical process is electrocoagulation, which has been widely used to treat various types of wastewater and water. Chemical coagulation and electrocoagulation had the same process but a different mechanism. The way aluminum or iron is delivered is the difference in the mechanism. This article focuses on the effects of various operating parameters and recent developments in the electrocoagulation for the drinking water treatment process. Their optimum ranges for maximum pollutant removal and various pollutants removed by this process are observed.