bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of High Early Strength Concrete (HESC) using Different Superplasticizer
Authors: Sunarno Y , Tjaronge M W , Irmawaty R , Muhiddin A B 
Published: December 2022

Abstract
High Early Strength Concrete (HESC) is one type of high-performance concrete. HESC production requires high-quality materials and additives, namely chemical admixture type C (superplasticizer) to get high performance. This study aims to obtain a HESC mix design using a superplasticizer with the best performance. The 3 variations of HESC are made by adding a superplasticizer to a mixed concrete with the same dosage but from 3 different manufacturers, namely HESC-1, HESC-2, and HESC-3. Specimens performance consisted of tests for both fresh concrete and hardened concrete. The fresh concrete was tested by the slump, and the hardened concrete was tested by density and compressive strength tested at the age of 12 hours, 14 hours, and 3 days on cylindrical specimens measuring 100 mm x 200 mm which have been cured by water curing. Based on the test results, it was found that the average slump values in HESC-1, HESC-2, and HESC-2 were (cm): 64.0, 69.5, and 70.5. This shows that all HESC specimens are categorized as Self Compacting Concrete. According to the results of the density test on all specimens ranging from 2382 to 2436 kg/m3, all specimens are included in normal-weight concrete. With the initial compressive strength value of HESC at the age of 14 hours in the range of 21.0 to 24.9 Mpa, it can be concluded that all HESC specimens meet the requirements of High Early Strength Concrete, where HESC-3 is the best performance one.
Uniform Deflection in PCI Girder with Diaphragm Installation
Authors: Indianto Andi , Ariesta Aprilia Rossa , Yanuarini Erlina , Rizal Rikki Sofyan , Sukarman Sukarman 
Published: December 2022

Abstract
Keramasan Bridge 2 is a bridge with an age of more than 30 years, so it is necessary to review its feasibility and serviceability. Based on visual observations, there are signs of cracks in the transverse and longitudinal directions on the bridge floor. Based on the results of the loading test, it is stated that the deflection on the girder has exceeded the allowable deflection, and the cause of the longitudinal floor crack is caused by the non-uniform vertical movement of the girder. Based on this, it is necessary to strengthen the superstructure first before repairing the bridge floor. The strengthening of the superstructure is carried out by installing a diaphragm between the girders. The diaphragm is an angled steel profile of 100 mm x 100 mm with a thickness of 10 mm. To determine the number and position of diaphragms, two alternatives were analyzed. The first alternative is to add three diaphragms at every 6.275 m distance and the second alternative is the diaphragm at every 3 m distance. The results of the analysis show that the deflection that occurs between the girders after the installation of the diaphragm is uniform. The installation of diaphragms with a distance of 6.275 m and 3 m can increase the uniformity of the girder structure up to 8.12 times and 6.60 times respectively. Whereas the installation of diaphragms with a distance of 6.275 m and 3 m can increase the stiffness of the girder structure up to 10.96 times and 11.26 times, respectively. This shows that adding a diaphragm can provide rigidity and compactness between the girders.
Demand Estimation for Non-Working Trips: Forecasting Passengers regarding the New Open of Railway Line Maros-Barru
Authors: Yatmar Hajriyanti , Panguriseng  , Buqra Eka , Rinaldi Ricky 
Published: December 2022

Abstract
This study aims to identify the demand estimation of passengers regarding the operational railway of Maros-Barru line. The new railway is expected to attract passengers using public transport from origin to destination. The existing condition of Maros-Barru majority used private vehicle as the choice and minibus with fragmented line. The new construction railway provided by the government services the passengers through Maros-Barru. The demand for the railway plays an important role in describing the potential passengers of each region. The non-working trips with flexible time for the trip are the main focus of this study. The potential passengers using the origin-destination (O/D) matrix are used. The analysis uses the growth factor of the population and forecasts demand according to OD data. The high trip based on OD estimation result showed that Pangkep was at the first position followed by Maros and ended with Barru. This result indicates that Pangkep has a high demand according to the forecasting passenger which is located in the middle regency instead of Maros and Barru that close to the Capital area. The high trip occurred for the total not only for the Origin trip but also Destination trip. Hence, the population growth of the district on Pangkep is the most compared to other districts in other regions.
Coastline changes monitoring induced by man-made structures using synthetic aperture radar: A new simple approach
Authors: Pujianiki Ni Nyoman 
Published: December 2022

Abstract
This study presents a new simple approach to detect the coastline changes due to the construction of man-made structures. The new approach uses low-pass filter to reduce the speckles errors and Otsu thresholding method the create binary image. Then, a closing morphological operation was conducted to improve the binary image. In the final step, the canny edge detection is used for coastline delineation. The coastlines changes analysis was done by using Digital Shoreline Analysis System (DSAS). In general, the processing steps of this new approach is semi-automatic processes, it does not require manual digitization to extract the coastline. This method was tested using two independent synthetic aperture radar (SAR) satellite images, i.e., ALOS-1 and Sentinel-1 SAR data. The results show that this new approach produced better results than other well-known methods. This new approach detects clearly the man-made structure and its impact to the coastal zone, i.e., abrasion and accretion. The study area is located in Pengambengan Port, Jembrana Regency, Bali, Indonesia. In addition, the result of this study can be used as evaluation parameters for future development of Pengambengan port or re-design of present structures.
Analysis of hydrochemical parameters and dissolved zinc interaction by using PHREEQC simulation
Authors: Alimuddin H , Andarani P , Yokota K , Inoue T , Nguyen M N 
Published: December 2022

Abstract
Zinc is frequently reacting with inorganic species in water to form zinc species. Thus, the chemical speciation of Zinc in the aquatic environment has become a significant concern nowadays due to its adverse effect on humans and its potential toxicity in the water system. In this study, to investigate the interaction between dissolved zinc and hydro-chemical factors and to estimate the Zn speciation form, samples of river water were collected spatially from the Umeda River mainstream and tributaries in different seasons for one year. The hydrochemistry and dissolved zinc pollution characteristics of the samples were analyzed. Zn speciation was assessed by PHREEQC simulation. The result show that the main form of Zn speciation was Zinc free ion (Zn2+) in all seasons. However, in summer and spring season, the ZnCO3 and ZnOH+ concentration was higher than the other season. These speciation form may be attributed to the activities around the river in different season according to the similarities in downstream and upstream areas by the hierarchical cluster analysis result.
A Low Cost Open Source Remote Monitoring System for Hospital Wastewater Management
Authors: Abiyasa Agus Putu , Nuraga I Ketut , Satriadi Aryangga Marta 
Published: December 2022

Abstract
Wastewater can be dangerous if not handled properly, e.g. it spilled out from the tank. Hospital wastewater hazard was even more damaging to environments and humans due to its chemical contents. Therefore, it is desirable to have monitoring system to prevent such incidents. In this research, remote monitoring of wastewater using low cost and open source IOT technology was implemented at Bali Mandara Hospital waste management facility. The system used ESP8266 microcontrollers and HCSR04 ultrasonic sensors to determine wastewater volume. Blynk IOT cloud server was used as the platform to collect and visualize the data online. The implemented IOT system showed robust performance as a monitoring system for hospital wastewater management.
Performance of Covid-19 Waste Management at Health Service Facilities in North Toraja Regency
Authors: Rahim I R , Selintung M , Jamaluddin I , Ihsan M , Tiranda E Y 
Published: December 2022

Abstract
Community health centers are the frontliners of healthcare services which in its activities produces medical waste and non-medical waste both in solid and liquid form. This waste needs to be managed in accordance with existing regulations where environmental management must be carried out systematically and sustainably. Regarding the management of Covid-19 medical waste in the health facilities of North Toraja Regency, this study aims to determine the management process, management constraints and compare the management of wastewater and hazardous and toxic solid medical waste generated from handling Covid-19 patients at hospitals and health centers in Toraja Regency. North. The research method used is descriptive research method with case study design. Data collection techniques are carried out by observations, interviews, and documentation of secondary data. The results show that the management of hazardous and toxic solid medical waste water and waste for Covid-19 patients in private hospitals leaves the processing to third parties and government hospitals destroy solid hazardous medical waste with incinerators, while at community health center the wastewater is directly discharged into water bodies and medical hazardous waste. handed over to a third party. The process of treating waste water and hazardous and toxic solid medical waste for Covid-19 patients at the health facilities of North Toraja Regency has not been in accordance with the guidelines issued by the Indonesian Ministry of Health. The main obstacle in processing solid medical waste water and hazardous waste for Covid-19 patients at the health facilities of North Toraja Regency is the lacking of operational costs and delays in disbursing operational costs. Government-owned hospitals were found to be slow to comply the Covid-19 Health Facilities Waste Management Guidelines issued by the Ministry of Health of the Republic of Indonesia.
Potential Marine Plastic Debris Detection using Sentinel-2 Multi-Spectral Instrument (MSI)
Authors: Damayanti A D , Hanami Z A , Hirose K , Ainun S , Putra R D 
Published: December 2022

Abstract
Plastic debris has a long-term and quite severe impact on the marine ecosystem. Population growth in the developing area, Makassar coastal zone, will contribute significantly to the land’s waste. Consequently, floating plastic debris comes directly from the land’s plastic leaks to rapidly increase marine plastic debris. Due to being a major environmental issue in the coastal zone and reducing options for removal are very limited, this study becomes to detect the potential marine plastic debris in Makassar by Sentinel-2 Multi-Spectral Instrument (MSI) using Kernel Normalization Vegetation Index (KNDVI) and Floating Debris Index (FDI) for satellite image processing. The plastic debris was corrected atmospheric effect by Sen2Cor and processed by Sentinel Application Platform (SNAP). The resolution of images was set to 10 x 10 meters. The target area was calculated as 173.47 Ha. The results show that KNDVI and FDI combined are a developed and powerful approach to detecting plastic debris. KNDVI has more representative indices (SE 0.38) than FDI indices (SE 0.47). Through the discriminant analysis were verified pixels of KNDVI (3506 pixels) and FDI indices (701 pixels). Meanwhile, the Sensitivity Analysis Value (SAV) was well performed to detect the potential of marine plastic debris by KNDVI with SAV 7.5 than FDI indices with SAV 2.9.
Estimation of Makassar’s Landfill Surface Temperature and Its Surroundings Using Remote Sensing
Authors: Hanami ZA , Damayanti AD , Takeda T , Alimuddin H 
Published: December 2022

Abstract
Remote sensing is one of the cost and time-effective methods that can be used to assess change in the land, especially the land surface temperature and land cover. This study aims to estimate Makassar’s landfill surface temperature as a vital waste management monitoring parameter and the surrounding area using remote sensing. The Landsat 5 and Landsat 8 data in the years 2006, 2009, 2013, 2015, 2018, and 2020 were used in this study to see the change in the temperature and land cover. The study confirmed a significant increase in landfill surface temperature, with the highest value of 67°C found in 2018 and the minimum is 30°C in the year 2006. It also showed that compared to the surrounding area, the landfill has a higher temperature, followed by the built-up area of land cover that expanded from time to time. The accuracy of supervised classification of the land cover in 2006-2020 ranged between 58%-98%, and the Kappa coefficient ranged from 0.42 to 0.97.
Wave Transformation on Wave Catcher Shore Protection – Dual Slope (WCSP-DS) Zig-Zag Model with Wave Focused Wall
Authors: Thaha MA , Puspita AID , Hatta MP , Paotonan C , Prihatini WZ , Suriamiharja DA , Patittingi F 
Published: December 2022

Abstract
The Wave Catcher Shore Protection Dual Slope (WCSP-DS) is a coastal structure with a dual function of shore protection and wave power generation. The WCSP-DS structure captures seawater through overtopping into the crest reservoir resulting in a higher reservoir water level than the sea. This elevation difference will be the pressure height (head) and is represented by the freeboard height (Fb) and together with the overtopping discharge unit (q) will be the main parameter for electrical power. This study aims to increase the discharge value (q) at the maximum freeboard height (Fb) through engineering effort in the wave transformation process by adjusting the setting position of the WCSP in a zig-zag manner and adding a wave-focused wall (WFW) to produce a maximum deformed wave height (Hdf) in front of the WCSP-DS. Located in Hasanuddin University’s Coastal & Environmental Engineering Laboratory, the study was carried out experimentally using geometrically scaled 1:20 physical model simulations. Three Dimensional (3D) wave basins in the size of 10 m x 15 m x 1 m equipped with an automatic wave generator and data recording instrument were utilized. Two type models namely the M1 (without collector) and the M2 (with collector) were simulated with relative water depth (d/z), freeboard height (Fb), incoming wave height, and period (Hi & T). The results indicated that the deformed wave height (Hdf) increased significantly ranging from 300% to 900% on M1 and from 350% to 1100% on M2. The increase in the value of Hdf also increases the discharge (q) that enters the reservoir. By these results, a combination of Fb and q can be selected which can generate optimal electrical power.
Study of Sediment Characteristics in the Jeneberang River’s Upstream
Authors: Wildany A L , Lopa R T , Maricar F 
Published: December 2022

Abstract
This study aims to determine the characteristics of sediments found in the Jeneberang River specifically in the upstream part. The data required includes the results of sieve analysis, grain diameter of the sediment and the density of the sediment. The study was conducted by taking samples from the segments around Sabo 7-1. The data obtained indicate that the gradation of sediment particles consists of fine sand, medium sand, coarse sand, fine gravel and coarse gravel with a median diameter (D50) of 0.5-13.10 mm and specific gravity values ranging from 2.659-2.682 gr/cm.
Analysis Of Sediment Concentration With Flow Speed In The Primary Channel In Saddang
Authors: Asrida Nur , Pallu M S 
Published: December 2022

Abstract
The decrease in channel capacity can cause sedimentation at the bottom of the channel and the condition of the channel lining is damaged so that seepage / leaks occur and buildings and sluice gates do not function properly. This study aims to analyze the concentration of sediment on the flow velocity. Measurements were carried out in the field to observe field conditions in detail related to sediment velocity and concentration. This research was carried out on the Rappang Main Channel from Upstream to Downstream of the Rappang Main Channel. The distance between upstream to downstream of the Rappang Main Channel is +- 30 Km. The distance between the upstream to the center of the research point is +- 18 Km, while the distance between the middle to the downstream channel is +- 12 Km. Velocity measurement using A.OTT propeller current meter model and sediment collection in the channel using grab sampler and van dorn tools. The results showed the effect of velocity on the value of sediment concentration in the dry season.
2D modeling of current patterns and sediment patterns on Pasir Beach, Kebumen
Authors: Puspita AID , Thaha MA , Hidayah B 
Published: December 2022

Abstract
Pasir beach is one of the beaches in the row of the South Coast of Java Island which is located in the Kebumen Regency, Central Java Province. On the sand beach, there is a fish landing port which is in poor condition. Some of the main port facilities are not functioning at all due to sedimentation problems. The purpose of this study is to determine the current pattern and sedimentation pattern on the Pasir beach, especially in the fish landing port area with 2-dimensional modeling. The results of 2-dimensional modeling with RMA2 and SED2D found that fluctuations in current velocity are not significant because the velocity is small. The increase in current velocity fluctuations is more dominantly caused by the influence of the narrow width of the port mouth, the body of water spreads so that the current velocity will also spread. In the sediment simulation, after simulating the distribution of sediment concentration for 10 days, in the location of the Pasir fish landing port, there is a change in the bed elevation due to the pattern of sediment distribution from the river. This basic change is strongly influenced by the concentration of sediment and sedimentation velocity of sediment grains at each location.
Effects of Fluctuation in Discharge and Head on Flow Parameters and Head Losses in Pipeline Networks
Authors: Bakri B. , Pallu S. , Sulhairi  , Pongmanda S. , Arai Y. , Ihsan M. 
Published: December 2022

Abstract
Discharge, head, flow velocity and Reynolds number are flow parameters in pipe networks. On the other hand, energy loss is one of the factors that affect the capacity of the pipe as a means of distributing water flow. Energy loss is caused by several factors including the roughness of the pipe walls associated with the pipe material. Due to the lack of attention to the interrelationship of these factors, sometimes there are piping networks that do not work optimally or do not function as expected. The purpose of this study was to determine the effect of changes in discharge and head on flow parameters and energy loss in the piping network. This study uses experimental research conducted in the laboratory. The primary data collection is quantitative analysis with the main data collection through measurements using a series of pipes as a test model, and is preceded by the collection of supporting data, namely the analysis of the characteristics of the water sample. The characteristics of the water samples used are density (ρ) 1,000 kg/m3, kinematic viscosity 0.804 x 10-6 m2s, dynamic viscosity (μ) 0.801 x 10-3 Nd/m2, viscosity 8.5x10-7 m2/sec, and specific gravity (y) 1.00355 gr/cm3, and a temperature of 29.50C. There are 3 discharge variations used, namely Q1 = 0.004 m3/s, Q2 = 0.003m3/s and Q3 = 0.002 m3/s and variations in head H1 = 2 meters, H2 = 1 meter and H3 = 0.5 meters. The results showed that due to changes in discharge and fall height caused an effect on flow parameters in the piping network. The greater the discharge, the greater the energy loss, and the greater the head, the smaller the energy loss. Changes in flow rate have a more significant effect on changes in energy loss when compared to changes in head.
Experimental Study of the Effect of Morphological Changes due to the Permeable Type Groyne Structuren
Authors: Massora A E D , Pallu M S , Hatta M P 
Published: December 2022

Abstract
The shape of a narrow river with a steep slope and high intensity of rainfall can affect the speed of the flow so that it has an impact on changes in flow dynamics that have the potential to cause erosion of the riverbed. This condition affects morphological changes with the emergence of degradation and agradation phenomena in certain areas. To determine the effect of morphological changes, laboratory tests were carried out using a permeable type groyne structure as an obstacle to reduce the flow velocity. The purpose of this study was to determine the effect of changes in basic morphology by changing the ratio of the groyne distance, which is 60 cm and 90 cm on variations in discharge and channel slope. The data required include flow velocity, flow depth, temperature and scour volume. In addition, the scour contours are drawn using Surfer software. The results showed that there was an effect of turbulent flow patterns on the use of groynes, causing local scour around the groynes and it was revealed that the use of groynes with a distance ratio of 90 cm was quite efficient in reducing scour.
Performance Analysis of Cenderawasih Secondary Collector Road Section in Mimika Regency
Authors: Batto O , Rauf S , Aly S H 
Published: December 2022

Abstract
This study aims to analyze the performance of the Cenderawasih Street section in the Mimika Regency. Traffic flow is observed by dividing the Cenderawasih Street into five posts. The traffic flow survey was obtained for three days, namely Tuesday, Wednesday, and Saturday, with observation periods at peak hours of 07.00-09.00, 12.00-14.00, and 16.00-18.00. The performance analysis of road sections includes traffic volume, travel time, average space speed, traffic density, road section capacity, degree of saturation, and level of service, referring to MKJI 1997. The highest traffic flow volume occurred at post 1 of Cenderawasih road ranging from 1428.20 pce / hour with a degree of saturation of 0.93. This shows that the Cenderawasih Road Section is at the service level with category E.
Analysis of the water-food nexus for food security in a high Andean Community
Authors: Fiestas M-A , Gonzalez S-N , Gomez-Cunya L-A 
Published: December 2022

Abstract
Water and food are facing increasing demand worldwide. This increase is significant in mountainous regions where glaciers are melting, and water availability is in danger. Food demand has also increased with the population growth. This study sought to evaluate relationships between water supply and food demand in a community located in the Peruvian Andes mountainous region. The developed methodology reveals a practical way to identify future problems with food availability. Water supply was evaluated using historical precipitation data. On the other hand, water demand was estimated using meteorological data. Irrigated areas were determined using 2019 agricultural data from the local government. Food consumption was evaluated using a 2019 per capita regional consumption. Results show a water deficit for the current agricultural demand for ten out of the twelve months. The potato was the main crop being produced in the community, among sixteen studied crops. A high percentage of the time, many products were found do not satisfy local demand. For example, the potato was found to secure only fifty-five percent of the total local-demand fifty percent of the time. Current results can help the management of food security.