bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of elementary students walking speed to children pedestrian pathway planning
Authors: Makalew F P , Adisasmita S A , Wunas S , Aly S H 
Published: February 2020

Abstract
Children pedestrian use pathways for access on their journey. As part of the infrastructure, the pedestrian pathway for elementary students, require adequate access to and from school. Among studies on pedestrian, research on child pedestrian walking speed is limited. Child pedestrian speed is influenced by walking time and distance. This research aim is to analyze children’s pedestrian walking speed and its influence on children’s pedestrian pathways. The method of research is a field survey with recorded elementary student’s pedestrian area of walking and their behavior. Data is collected from the video and photo recorded of 14 elementary schools in the urban area and 9 elementary schools in the rural area in North Sulawesi, Indonesia. This study involves elementary students age from 6 to 12 years old from grades 6 to 12. The analysis is a comparison of student pedestrian speed in the urban and rural areas and with previous research. Due to most pedestrian children behavior is to run to and from school, the children’s pedestrian speed is higher than previous research. Considering the area along their walking time, facilities provided should be friendly and safe for children. Therefore, children, pedestrian pathway needs specific regulation considering the urban and rural area.
Model influence means operational performance on the port of Jayapura
Authors: Bahtiar  , Adjisasmita S A , Ramli M I , Pasra M 
Published: February 2020

Abstract
The Port of Jayapura is located in Papua Province, including the Second Class Port within the Working Area of Indonesian Port IV, located between 02º 32º 30º LS and 140º 42º 30ºBT. The position of Port of Jayapura is strategic and part of the sea toll road in Indonesia, as it faces the Pacific Ocean in the north. Areas have potential as hinterland harbour Jayapura. Almost all of the district needs logistics in the central mountains of Papua, which are served by the Port of Jayapura. Distribution patterns are long enough to cause the cost component on behalf of transportation components can reach Rp 1.1 million per sack of cement or the price can rise to 1200%. The means have a significant effect on the port’s performance of 35.8%, meaning that every 100% increase in facilities will increase port performance by 35.8%. Infrastructure significantly affects the port’s performance of 42.6%, meaning that every 100% increase in infrastructure will increase the port’s performance by 42.6%. The Ulayat right has significant effect on the material of 38.9% with the negative direction that the increasing customary rights of the indigenous people will decrease the port performance. The increase of Ulayat rights by 100% will decrease the port’s performance by 38.9%.
Resistance to cohesion loss in cantabro test on specimens of porous asphalt containing modificated asbuton
Authors: Mabui D S , Tjaronge M W , Adisasmita S A , Pasra M 
Published: February 2020

Abstract
Nowadays, road pavement in Indonesia is still dominated by flexible pavement with petroleum bitumen mostly used as a binder. There is a huge deposit of hydrocarbon sedimentary rocks in several areas in Buton Island, Indonesia. One product of Buton natural rock asphalt is refined Asbuton modification which consists of approximately 70% bitumen and 30% minerals. An investigation of the effects of Asbuton modification on the performance of porous asphalt mixture was made using six mixtures based Asbuton modificated were 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, and 7.0%. This paper presents a comparative parallel about resistance to disintegration or cohesion loss from the results of the Cantabro test for raveling resistance. The application of Retona Blend as a binder in the porous asphalt mixture improved the raveling resistance in relationship Asbuton modification content with cantabro loss value.
The effect of water immersion on compressive strength of Senoni stone, East Kalimantan
Authors: Eswan  , Adisasmita S A , Ramli M I , Rauf S 
Published: February 2020

Abstract
This study aims to analyze the compressive strength value of Senoni stone, East Kalimantan and its effect on water immersion. Free compressive strength testing is carried out at 25oC. The number of cylindrical and cube specimens for free compressive strength test each of 3 specimens. Compressive strength testing using the Universal Testing Machine (UTM). The results showed that the compressive strength of Senoni stones decreased due to water immersion. This shows that the stone of Senoni, East Kalimantan is not resistant to water.
Effect of the slope of flume bed to the debris potential flow
Authors: Petrus F , Pallu M S , Thaha M A , Maricar F 
Published: February 2020

Abstract
This article aims to determine the effect of the basic flume slope to the potential flow of debris flow. This article discusses the combination of open check dam type (beam type) placed at the top and the closed check dam type placed at the bottom with variation of the distance between the checks of dam in a flume with the size used in the experiment that is 30 cm x 32.8 cm x 1200 cm with a slope of 10°. The composition of the sediment used is type D50. The results of this study using three types of base flume slope are the greater the slope of the base flume will result in a greater debris flow on the condition without wood and on conditions with wood. The larger the slope, the greater the sediment and wood that passes from the check dam series. The smaller the base slope of the flume, the larger the timber being retained on the open check dam.
A flume experiment study of energy lose at downstream of a sluice gate
Authors: Maricar F , Maricar M F , Sasmito S G 
Published: February 2020

Abstract
A sluice gate is a controllable barrier that controlling the elevation of the water at the channel. Generally, energy change occurs at the upstream and downstream of watergate, caused by the impact of the water flow at watergate upstream. This study aims to analyze the energy change at Watergate and to compare the value of energy change that occurs at the channel with or without sediment. This research was carried out by the Civil Engineering Hydraulics Laboratory of the Faculty of Engineering, Hasanuddin University, which runs from December 2018 to March 2019. In this research, we use some variables that are channel bed condition, flume slope, debit, and watergate openings. The result of this research shows that debit and watergate openings really affect the value of the energy change, while the flume slope is not really affected it. The energy change that occurs at the flume without sediment is bigger than the energy change that occurs at the flume with sediment in it.
Determining water rate of the HIPPAM system
Authors: Bakri B , Selintung M , Usman F , Ihsan M , Arai Y , Mangarengi N A P 
Published: February 2020

Abstract
The increasing demand for drinking water demand in Indonesia is mainly determined by the rapid population growth. In overcoming the issue, the development and rehabilitation of water supply system are necessary. The tariff or rate of water is a price assigned by water authorities on water supplied and distributed to their customers through the pipe network. A tariff is not only to recover the full costs of its supply and production, but also to incorporate the operation costs. Hence, it establishes the continuity of the water supply in the future. This research aims to determine tariff or water rate in HIPPAM System with the case study at Salawaty District – Sorong Regency. The tariff should be adjusted to the ability to pay of customers, and it is based on the income and the amount of water paid in a month. Besides, the next parameter is the willingness to pay that can be obtained from the customer survey. The results show that the majority of customers are willing to pay the water rate at the low price of IDR 1500/m3. On the other hand, the research suggests that the most appropriate tariff in the study area is IDR 2456,1/m3. This tariff is assumed to be able to guarantee the continuity of the drinking water supply system in the future. Keywords: tariff, water supply, HIPPAM, Salawati District, Sorong Regency
Effect of wave steepness to relative wave run-up on OWEC breakwater
Authors: Puspita A I D , Thaha M A , Pallu M S , Maricar F 
Published: February 2020

Abstract
OWEC (Overtopping Wave Energy Converter) breakwater is a coastal structure model concept. The concept is to integrate the breakwater and the overtopping wave energy converter. This coastal protection model concept is equipped with a reservoir at the top of the structure to collect water that overflows from the top of the structure (overtopping). Many factors influence the amount of wave overtopping discharge; one of them is the run-up height. The height of wave run-up that occurs is influenced by many factors, one of which is the steepness of the incoming wave. The effect of the wave steepness to the relative wave run-up on OWEC breakwater is investigated experimentally. The study is carried out in wave flume with regular waves. The OWEC breakwater model is simulated with slope variations and freeboard variations. The results of the study show that small wave steepness value produces a large relative wave run-up value and vice versa. For a review of the structure slope, the results showed that the largest relative run-up value was obtained in the largest slope of the variation of the slope studied, namely 1: 2, at all different freeboard heights.
Experimental and numerical modeling of sand column applied on recharge reservoir to control seawater intrusion
Authors: Azis A , Yusuf H , Badaruddin S , Iqbal M , Faisal Z , Hasanuddin H 
Published: February 2020

Abstract
Excessive groundwater exploitation may lead to groundwater depletion, causing groundwater level at the inland lower than sea level and result in seawater intrusion (SWI) in a coastal aquifer. To control the occurrence of SWI, an alternative solution is to increase the replenishment of groundwater using a recharge reservoir. If a recharge reservoir is built in a region with soil hydraulic conductivity below 10-5 cm/s (semi impermeable), then a sand column is usually proposed, put on the bottom of the recharge basin and directly connected to the aquifer layer. The purpose of this study is to analyze the effectiveness of the sand column’s application in the recharge reservoir to control SWI. This research is an experimental study that combines physical and numerical modeling of the recharge basin with sand columns under a laboratory scale. The results of this research are beneficial for field applications because the process that occurs in the recharge reservoir can be determined prior to the real construction in the field. The results of the research are also useful to investigate whether the recharge reservoir is effective or not as a buffer of SWI in coastal aquifers. The expected result is that by using sand columns in the recharge basin, seawater intrusion can be controlled. It is hypothesized that the higher the number of sand column density and water level on the reservoir, the farther the freshwater saltwater interface is pushed toward the sea.
Flume experiments on log accumulation at the bridge with pier and without pier
Authors: Maricar M F , Maricar F , Lopa R T , Hashimoto H 
Published: February 2020

Abstract
Heavy rain causes landslide and debris flow, which produce sediment and woody debris in the mountain river basin. During the process, woody debris and sediment are trapped by the obstacles. As a result, woody debris accumulations at bridges are formed. Trapped woody debris at the bridge caused inundation because the obstacle blocked the water flow in the river course. To get more information regarding the woody debris accumulation at a bridge, laboratory flume was used for experiments to investigate the characteristics of woody debris accumulation at a model bridge without a pier. As a result, the experiments show that the number of trapped wood pieces increases with the number of released pieces. Moreover, the trapped wood pieces caused wood accumulations at the model bridge and backwater rise in its upstream side region. Besides that, the backwater rise increase with a number of trapped wood pieces at the bridges.
Observation pattern of water mass structure at Jeneberang river estuary
Authors: Karamma R , Pallu M S , Thaha M A , Hatta M P 
Published: February 2020

AbstractThis research is a field study conducted in the estuary Jeneberang river. The estuary, the transitional zone formed between the river environment and the marine environment. In this region, there is the mixing of seawater with fresh water that has its own uniqueness with fluctuating salinity. This research aims to see the pattern of salinity distribution and temperature in the area of Jeneberang estuary on the tide and receding conditions. Data retrieval channeled on the area of Jeneberang estuaries with a distance between points 200 m using the ADCP (Acoustic Doppler Current Profiler) and CTD (Conductivity Temperature Depth) tools. The results showed an increase in salinity at Jeneberang estuary, which was influenced by surface and river bed.
Parameters optimization of tuned mass damper using fast multi swarm optimization
Authors: Frans R , Arfiadi Y 
Published: February 2020

Abstract
Tuned mass damper (TMD) has been used for the vibration controller of building, especially for high rise buildings. TMD is one of the passive devices for reducing the response of the structure subjected to dynamic external disturbance such as wind, or earthquake load. TMD used its weight for reducing the vibration, TMD’s frequency is set to the structure’s frequency so that the frequency should be in resonance to each other for reducing the response of the structure during the dynamic load. Therefore, three variables have a significant effect for TMD performance, which are the mass ratio of TMD, the frequency ratio of TMD, and the damping ratio of TMD, which lead to two important variables of TMD properties, stiffness, and damping of TMD. This paper developed an empirical equation for obtaining the optimum parameters of tuned mass damper based on the H2 norm control system and fast multi swarm optimization (FMSO). The objective function was to minimize the acceleration and displacement response of the structure. The result shows a strong correlation both the mass ratio of TMD to the frequency ratio of TMD and the mass ratio of TMD to the damping ratio of TMD.
Relevance between filtration rate and filter media thickness in downflow filter systems
Authors: Adriati Y , Pallu M S , Selintung M , Bakri B 
Published: February 2020

Abstract
One of the simple, easy and inexpensive water treatment technologies is the Sand Filtration technology. Sand Filtration is one of the very small grains of sand as a filter media. This study is an experiment. The objective to be achieved in this study is to analyze the difference in the thickness of the sand filter media to the filtration speed and the amount of filtration discharge, which is the object of research is the raw water of the Departemen engineering Hasanuddin University with treatment using a long reactor 50 cm, width 50 cm and height 150 cm, Down Flow filtering method with sand thickness varies namely 20 cm, 30 cm, 50 cm, besides that it also uses 15 cm gravel and 5 cm fibers. Testing is done by screening, calculating the speed of water through the filter and checking the flow of water. The results were obtained with a thickness of 20 cm sand filtration media resulting in a filtration flow of 0,000199 m3/second with flow rate filtration 0,000794 m/second, a thickness of 30 cm sand filtration media resulting in a filtration flow of 0,000220 m3/second with rate filtration 0.00879 m/second while 50 cm sand produces filtration flow 0,000242 m3/second with rate filtration 0.00969 m/second. It can be concluded by increasing the thickness of the filtration media filtration discharge and filtration speed also increases.
The construction of Karalloe multipurpose dam for the Kellara technical irrigation development
Authors: Hasbi M , Subandi  , Mappanyompa M , Bakri B 
Published: February 2020

Abstract
The problem of Jeneponto regency is a raw water crisis for water drinking and irrigate in dry season. In rainy season, a high sediment to deposit in the lowest area. the regulate flooding and inundates rural and urban. A Jeneponto river is a joint river between Karalloe River and Kellara River which come from Lompo Batang mountain and the existing raw water is not enough to be supplied to the raw water treatment plant and not enough to be supplied to the existing Kellara technical irrigation area so the rice cropping is not optimize although existing Kellara weir and Karalloe weirs will support the irrigation. To solve the problem mentioned above, the Karalloe multipurpose dam will be constructed urgently. The problem will be managed by sustainable integrated water resources management, Step by step method to be applied in 3 terms for example in the short term, the middle term and the long term. Methodology study of this paper focused to solve the raw water crisis and regulate flooding in Jeneponto Regency. The governments apply by not only construction of the Karalloe Dam but also to apply an integrated approach.
Green construction application of the vida view apartment project in Makassar
Authors: Abdurrahman M A , Latief R U , Mustari A S , Mustika L 
Published: February 2020

Abstract
As a developing country, Indonesia has a very rapid infrastructure development which causes the number of construction projects to increase. Green Construction is a reference for construction projects to keep paying attention to environmental sustainability that is attempted by PT. PP (Persero) Tbk. in the construction project of Makassar Vida view Apartment. The Green Construction Assessment (MAGC) model is an assessment standard developed by Ervianto from the Green Contractor Assessment Sheet and GREENSHIP V 1.0. This assessment model was developed in order to know the role of the contractor in applying green construction to the project being handled. This study aims to find out what the application and how much is achieved from PT. PP (Persero) Tbk. in implementing Green construction based on the Green Construction Assessment Model (MAGC). As a result, the Vida View Makassar Apartment Project by PT. PP (Persero) Tbk. has implemented Green Construction in its construction process where this is evidenced by the implementation of 7 aspects of Green Construction by the Green Construction (MAGC) Assessment Model. From the results of the study, Green Construction Value (NGC) data was obtained at 15.83 from a maximum value of 21.92 which is 72.22% of the maximum value. The biggest achievement of NGC for projects in Indonesia is 15.47 and it can be concluded that the achievements achieved by PT. PP (Persero) Tbk. already good at implementing Green Construction.
Identification of construction productivity components in Indonesia. Case study of construction projects at the ministry of public works and housing provision (PUPR)
Authors: Anditiaman N M , Latief R U , Rahim I R , Arifuddin R 
Published: February 2020

Abstract
The problem faced by Indonesia at this time is the lack of information related to supply and demand related to the productivity component, so it needs a study to formulate an index of construction productivity in Indonesia. The analysis of the determination of the productivity component is carried out by the desk study approach with the standard of construction productivity calculation, the standard for construction work financing, and mapping analysis approach based on project technical document data from 3 Unor, namely Water Resources, Highways, and Cipta Karya. The mapping analysis results obtained that the Workforce Component consists of Experts, Skilled Workers, and Non-Skilled Workers, Work Equipment Components include heavy equipment and light equipment and Construction Material Components. Experts for Unor Water Resources consist of Water Resources Experts, Quality Management System, and K3 Construction, Unor Bina Marga, namely Road Engineering, Bridge Engineering, Quality Management System and OHS Construction. Unor Cipta Karya’s experts consist of Environmental and Sanitation Engineering, Environmental Sanitation, Project Management, and Construction Management Experts. Skilled Workers from 3 Unor, namely Supervisors, Measurers, Land Mapping, Road Implementers/Irrigation, and K3 Officers. Non-skilled personnel consist of administrative and financial staff.
Integration conceptual framework of quality management system - occupational safety and health- and environment (QHSE) at PT. Wijaya Karya
Authors: Laksana A H , Arifuddin R , Burhanuddin S , Abdurrahman M A 
Published: February 2020

Abstract
This research is to identify the advantages of integrating quality management systems, Occupational Health and Safety management systems, and Environmental management systems (QHSE Management System). The study was conducted at a State-Owned Enterprises Enterprise. The study will compare All Management Systems with Existing in Wijaya Karya Company with ISO 9001 System on quality management system, ISO 45001 on Health and Safety management system, and ISO 14001 on Environmental management system. The study was conducted by Archive Analysis and Literature studies. Previous literature studies show that the clauses that make up the integration of the QHSE Management System are scope, leadership, policy, planning, support, operations, performance evaluation, and improvement.
The influence of solution pH on the absorption of heavy metals Cr (VI) by Saccharomyces cerevisiae biomass
Authors: Ibrahim R , Djide M N , Lapik C 
Published: February 2020

Abstract
In general, industries produce waste, which causes environmental pollution and is a danger to living things. Chromium heavy metal waste is one type of waste that has high toxicity that can lead to chronic poisoning, acute, and can cause cancer. Biological treatment is a choice to reduce the concentration of heavy metals in environmental media. This study uses a biosorption column that utilizes Saccharomyces cerevisiae bacteria using bacterial biomass made in a state of silence in a continuous column, then flowing Cr (VI) metal solution downflow with a constant flow rate. Laboratory analysis results show that the removal efficiency of Cr (VI) for the initial pH 3 solution is 44.74% - 77.84%, the pH 5 treatment is 7.52% - 30.54% and the pH 7 treatment is 5.80% - 11.40%. The highest removal efficiency occurred at pH 3 of 77.84%. The remaining metal concentrations in the barrel can reduce to 11.08 mg/L.
Chemical composition of green and roasted coffee bean of Gayo arabica civet coffee (kopi luwak)
Authors: Muzaifa M , Hasni D , Febriani  , Patria A , Abubakar A 
Published: February 2020

Abstract
Kopi luwak, is an Indonesian exotic coffee, is known as one of most popular coffee in the world. This coffee is prepared from the finest and ripest coffee berries that are eaten by Asian civet (Paradoxurus hermaphroditus), cat like-animal. The aim of this study was to determine the chemical attributes of kopi luwak both in green and roasted coffee bean. This study conducted by collecting the six samples of kopi luwak from different farms in Gayo Highland, which then processed onto green and roasted coffee beans. The examined parameters are protein, lipid, caffeine and chlorogenic acids. The results of this study showed that the differences existed in chemical attributes of green and roasted of Gayo kopi luwak. The average contents of lipid, protein, caffeine and chlorogenic acids of Gayo arabica kopi luwak in green bean were 12.30%, 13.36%, 1.20% and 3.73%, while in roasted bean were 14.79%, 13.66%, 1.10% and 0.88% respectively. To be conclude with, lipids and caffeine survived during thermal treatments in roasting process, meanwhile chlorogenic acids and protein (N-compunds) are degraded and formed smaller fragments with lower molecular weights.