bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of liquefaction potential using cone penetration test (CPT) and standard penetration test (SPT)
Authors: Suryanegara Dwipa R S , Arya I W , Wiraga I W , Pramana I M W 
Published: March 2020

Abstract
To evaluate soil resistance against liquefaction, a simplified procedure has been developed based on directly field soil testing. There are four recommended field tests, including CPT and SPT. Soil resistance to liquefaction is measured by the safety factor SF, which is the ratio between the capacity of the soil to resist liquefaction cyclic resistance ratio (CRR) and the soil stress occurs due to an earthquake cyclic stress ratio (CSR). If SF <1, liquefaction occurs. This research was carried out at Sanur area, Southeast Denpasar City, Bali, by conducting 6 pairs of CPT and SPT tests, each of 6-meter depth. The Ground Water Level (GWL) at this area is 1.5 meter below the soil surface. The soil type is silty sand to sandy silt, with the unit weight between 1.617 to 1.837 g/cm^3. The calculation results, both with CPT and SPT, show that the soil layer did not experience liquefaction with earthquake magnitude Mw = 4.0. At Mw = 5.0, liquefaction occurs in most soil layers, except the 1.5-meter upper soil layer. On Mw = 6.0, almost all soil layers experience liquefaction. Evaluation of soil resistance to liquefaction using CPT and SPT gives results that are not much different.
Waste management based on indigenous communities in Jatiluwih Village
Authors: Winaya I N A P 
Published: March 2020

Abstract
The population in Jatiluwih Village continues to increase with an average rate of population increase of 1.03 percent starting from 2014 until 2018. Waste management consists of short-term, medium-term, and long-term plan. Based on Regional Regulation of Tabanan Regency number 11 years 2012 about facilities and infrastructure of Integrated Waste Management Site (TPST), it is developed as a place to carry out collection, sorting, reuse, recycling, processing and final processing garbage. It is divided into several service areas. So that it can improve the quality and coverage of waste management services and reduce the volume of waste that must be sent to landfill. Composition waste on Jatiluwih Village is 71 percent organic and 29 percent an-organic. Wet organic domination bay waste from house is vegetable and food, dry organic is waste from temple and backyard, an-organic domination by bottle drinking and plastic bag. Media for waste in the house not in good condition. Jatiluwih Village have potency to treatment the waste from organic using reducing, and an-organic partnership with collected waste.
The effect of Welded Wire Fabric (WWF) confinement on axial capacity of hollow columns
Authors: Suasira I W , Sudiasa I W , Jaya I M , Santiana I A , Tapayasa I M 
Published: March 2020

Abstract
The aim of the study was to determine the effect of installing different sizes of Welded Wire Fabric (WWF) as a concrete restraint on axial carrying capacity of hollow columns. WWF is used with a wire spacing of 12.2 times 12.2 mm, 19 times 19 mm, 25 times 25 mm, with a diameter of 0.7 mm. A hole of 1 inch in the column causes a decrease in compressive strength of the column of 5.62 percent, i.e., from compressive strength of 226.697 kg per square cm (specimen A) to its compressive strength 214, 065 kg per square cm (specimen B). The percentage increase in axial carrying capacity of the perforated column type C is 13.16 percent, W1 is 2.96 percent, W2 is 11.33 percent, W3 is 13.27 percent, SW1 is 0.51 percent, SW2 is 5.51 percent and SW3 is 9.08 percent. WWF is able to increase compressive strength of hollow concrete columns by W1 is 7.08 percent, W2 is 12.41 percent, W3 is 14.36 percent, SW1 is 4.53 percent, SW2 is 9.73 percent and SW3 is 14.59 percent.
Analysis of operation and maintenance cost flood handling system of Badung River
Authors: Mudhina M , Parwita I G L , Yasada G 
Published: March 2020

Abstract
All of Badung River with a wide width of 10-40 meters is a typical urban river that has very important meaning to the flood handling system in the Denpasar City area. The results showed that the buildings on the Badung River included 2 trash racks, 1 rubber dam, 2 movable weirs and a 42 km long river wall with an average height of 3-5 m. The flood handling system has been carried out with control of the existing discharge through motion weirs and rubber weirs. While reducing waste that can cause flooding is done by building garbage filters. From the results of the analysis the operating and maintenance costs indicate the cost of routine inspection of 57,772,800 IDR/year, routine search fees of 27,936,000 IDR/year, additional eviction fees of 100,550,400 IDR/year, monitoring and evaluation costs 27,360,000 IDR/year, flood material costs 7,240,000 IDR/year, routine operations and maintenance of 3,306,067,750 IDR/years, the need for periodic fees every 5 years is 2,200,000,000 IDR and the cost of dredging sediments and river stone repairs amounting to 1,113,566,000 IDR every five years.
Redesigning the foundation of Bangli solar power plant on a former landfill
Authors: Indrayanti A A P , Wiraga I W , Jaya I M , Mas Pertiwi I G A I 
Published: March 2020

Abstract
Bangli solar power plant has 5004 solar modules and uses concrete foundations to support those modules. Due to the location of this power plant was a former landfill, after 5 years in operation, 121 foundations have dropped to lower level. The soil under foundation is not enough to support modules sufficiently. In this paper, a new design has been proposed to correct this problem. The first step is to test the carrying capacity of soil through Sondir boring. Using Standard Penetration Test (SPT) obtained that the layer of hard soil is located at a depth of -10m from the original soil surface with type of soil layer above the elevation of hard soil in the form of silt soil. Using a palm foundation, carrying capacity of a foundation with a width of less than 1.2 meters and a depth of foundation of 1 meter. This makes the average carrying capacity is only 0.39 - 1.20 kg/square cm or the value is too small for foundation of solar power plants. The proposed foundation is a 50 x 50 cm palm foundation that is laid on a geotextile bed. The area of the geotextile depends on the area of decreased foundation.
Planning area of resist natural disaster in Bentenan Village South Eastern Minahasa
Authors: Makalew F P , Supit S W M , Kondoj N E , Mantiri H G 
Published: March 2020

Abstract
Disaster management is crucial to protect the area in order to overcome the impact from such disaster. This paper aims to plan safety zone area and evacuation route for village settlement to be natural disaster resistance. Moreover, an evacuation building is planned with a safe structure as a temporary place for the community. The study area is Bentenan village in North Sulawesi. This area has a high risk of natural disaster including earthquake and tsunami. The methodology is field study with data collected using a drone to get data contour area and analyse using computer program AutoCAD for measurement. The standard for safe area and previous research is used as a comparison for the zoning area. The result shows that for maximum30 meter high of a tsunami wave, all area has a great impact on damage due to the area of settlement is under 30-meter-high above the sea level. For evacuation route, more alternative safe evacuation area should be provided with a location on the highest area. Available main streets are easily accessed while route on the green area should be made. Building for evacuation should have a good quality of material and structure and easy access for the community.
The effectiveness of horizontal water filtering system on deep rainwater harvesting wells
Authors: Sudiajeng L , Wiraga I W , Parwita I G L M , Budiadi I M 
Published: March 2020

Abstract
The main requirement in recharging aquifers is the quality of refill water must meet the groundwater quality standards. Therefore, the role of the filtration system is important. The horizontal water filtering system has designed to lengthen the filtering process. First step: Rainwater falls that contaminated with various substances flows into the 20 cm thick and 1 m depth of gravels; Second Step: Rainwater continued flowing into the horizontal pipe, 4” of diameter, 20 cm length, with the fibre palm tree inside. The filtered water comes out and collected in a reservoir, flows into a recharge wells with 4” diameter and 32 m depth, and fills the aquifer after going through the soil layer. Laboratory tests shows that the horizontal water filtering system is effective to reduce the content of substances, except the TDS for filtering system in Plaga Village. It decreased from 135.00 uS/cm to 81.90 uS/cm (26.55 percentage) in Tegallalang village, but it increased from 95.00 uS/cm to 154.00 uS/cm (62.21 percentage) in Plaga village, although it still meets to the groundwater quality standard. The increasing of TDS might be cause by gravels or palm tree fibres that not thoroughly cleaned and still contained TDS.
The effect of river flow velocity distribution on indications of the occurrence of degradation of the Tambong River basin
Authors: Erwanto Z , Sugata A N I 
Published: March 2020

Abstract
Floods that have high flow velocity can be indicated that there is degradation in the riverbed. If the deterioration of the riverbed is allowed to continue, it can cause damage to the existing building infrastructure around the river. Tambong River, located in the Kabat District of Banyuwangi, has experienced river overflowing. Process of measuring flow velocity uses the current meter. To determine the shape and contour of the Tambong River flow velocity distribution using the Surfer Software. In the Tambong River basin, the middle river of the downstream has the highest river flow velocity distribution of 0.92 m/sec, with a discharge of 1.75 m3/sec. It was indicated that the Tambong River Basin in the middle of the downstream would experience river bed degradation by showing a Reynold of 426, 997.33 and a Froude value of 0.55 so that it includes turbulent flow types and flow types subcritical. Average flow velocity distribution in the middle of the Tambong River basin is 0.901 m/sec and was indicated to have degraded as thick as 2.10 m/year. It can be concluded that the middle part of the Tambong river is a flood-prone zone due to the considerable velocity of the river flow.
Comparison of Ziegler-Nichols and Cohen Coon tuning method for magnetic levitation control system
Authors: Isdaryani F , Feriyonika F , Ferdiansyah R 
Published: March 2020

Abstract
Magnetic levitation is an example of a nonlinear system that is naturally unstable. In the control system field, it can be also used to check the effectiveness of control methods. Unlike other researches overcoming by analytical method, this research investigates the solution of the nonlinearity of the magnetic field by placing two effect hall sensors on the top and bottom of magnetic coils. After decreasing the effect of nonlinearity, two PID control tuning methods, Ziegler Nichols (ZN) and Cohen Coon (CC), are compared to obtain an appropriate control structure and its initial parameters. The experimental result shows that the best control structure of ZN method is PID whereas its initial parameters, Kp, Ti, and Td, are 15.33, 0.036 and 0.009, respectively. The rise-time and settling time of the response are 0.54s and 0.59s. The appropriate control structure is PI control whereas Kp and Ti are 30.05 and 0.012 from CC method. The rise-time and settling time resulted are 0.8s and 0.67s. The ZN method with PID control structure has a better response with smaller rise-time and settling time than PI control from CC Method. This research is benefit for solving a problem dealing with magnetic levitation control.
Experimental analysis on solar powered mobile robot as the prototype for environmentally friendly automated transportation
Authors: Dewi T , Risma P , Oktarina Y , Taqwa A , Rusdianasari  , Renaldi H 
Published: March 2020

Abstract
An unmanned vehicle can be deployed in a dull area such as a repetitive task of a transport vehicle in a factory setting which can be considered as automated transportation. The current problem faced by the transportation sectors are the reduction of fossil fuel availability, therefore, solar-powered automated transport vehicle is a great alternative. This paper discussed the experimental analysis of solar-powered mobile robot as the prototype for environmentally friendly automated transportation. The solar cell output is used to charge the capacitor banks functioning as the substitute for a battery system. The robot moves from one station to another imitating the stations in a factory scenario. The solar-powered robot is equipped with a voltage sensor to ensure efficient charging time. The charging time was conducted in 5 days to show the charging fluctuation affected by external factors such as weather condition. The highest average charging in a day is 4.96 V during 100.687 Lux of irradiance received by the solar cell. The highest power required during the loaded task is 0.0121 W, and during unloaded is 0.0106 W. The experiment results show that the proposed method is effective for environmentally friendly automated transportation.
Pedestrian lane and obstacle detection for blind people
Authors: Supriyadi T , Setiadi B , Nugroho H 
Published: March 2020

Abstract
Pedestrian lane and obstacle detection have been a big problem for a blind person. The person has to use special tool or assistant to do daily activities. This work has utilized camera function, connected with data processing (mini PC) to process information captured by a camera. At first, RGB image, which was captured camera, was converted into XYZ colour system. This colour system was very useful to highlight pedestrian lane to reduce other objects. Then, colour filter was implemented to remove unnecessary objects, followed by close morphology to expose pedestrian lane. The result is white region which represent pedestrian lane. Major axis was then calculated using moments and its angle (calculated counter clockwise with reference to x-axis) was sent to the user to notify him/her which direction he/she can go. In the process of obstacle detection, some samples of RGB images has been used to train a neural network. The model was then used as obstacle detector. RGB images captured by camera were then used as test data. The result > 0.7 was considered as obstacle. The experiment shows that under illumination of <15000 lux, the method can achieve 89.7 percentage accuracy on pedestrian lane detection and 100 percentage accuracy on obstacle detection.
Design a three-phase step-down power supply based on ANSI/IEEE standard
Authors: Suhantono D , Sajayasa I M , Sukarma I N 
Published: March 2020

Abstract
An alternating current three-phase step-down power supply design is a system development process that creates an existing three-phase system whereby the primary side of the Y relationship and the secondary side of the Y relationship. The problems in the design of three-phase step-down power supply circuit are the existence of harmonics, losses and unbalance voltage. The power supply test is carried out using no-load and linear load resistance with the value of resistances in range of hundreds ohm. The circuit is tested for resistance number one, resistance number two, resistance number three and resistance number four transformers to obtain a power supply design that meet American National Standards Institute or Institute of Electrical and Electronic Engineering standards. The test results of four transformers in the form of three-phase step-down found that resistance number one and resistance number two type transformers have the lowest copper loss percentage, core loss, voltage THD and low unbalance voltage, so that these power supply can be made according to ANSI/IEEE provisions.
Insulation resistance and breakdown voltage analysis for insulator cover type YSL-70AP
Authors: Jondra I W , Widharma I G S , Sunaya I N 
Published: March 2020

Abstract
Electrical energy has become a primary necessity, for every human around the world in globalization era. Electrical energy very important in every human activity to supporting the economy. Currently requires reliable of electrical distribution energy. Reliability of electrical energy supply is measured by the low value of SAIDI and SAIFI. Most of the PLN APJ has not able to fulfil SAIDI and SAIFI targeted by SPLN. There are 54 percent medium voltage disorder due to temporary interference. These disorders are caused by trees, animals and birds. insulator cover applied to reduce temporary interference. The problem is no research explaining the isolation quality and voltage breakdown capacity. This research conducted by quantitative testing and analysis. It was finding that the insulator cover type YSL-70-AP is reliable to reduce temporary disorder and environmentally with consideration: (a) The insulation value is 278.80 Mega Ohm, so that the electrical current of phase-ground fault is only 41.61 micro Ampere, just 0.36 percent of maximum limitation of PLN standard; (b) The voltage breakdown capacity is 49.63 Volt, more than 207 percent of minimum limitation of PLN standard. The voltage breakdown capacity can be increase by wings extension.
The implementation of Fast Hilbert Transform with low pass filter for reconstructing breathing sound signals in LabView
Authors: Purnama I B I , Sumertayasa I M 
Published: March 2020

Abstract
Many studies have stated that the respiration rate is one of the vital signs in individual health. It can be used to identify serious illness. Detecting either the chest movement or the exhausted gases properties using various sensors are the common methods to monitor respiration rate. Apart from both, breathing sound seems also effective for such purpose without requiring any complicated sensing devices. However, attaining respiration rate from the burst-type of breathing sound signals is challenging. Their high variations in frequency, amplitude, and the interval between inhalation and exhalation make the reconstruction of a smoother signal needs extra signals processing effort. This paper proposes a technique to reconstruct breathing sound which is acquired using a built-in headset microphone and implemented using Fast Hilbert Transform with Low Pass Filter in LabView. Through adjusting a proper filter order and cut-off frequency, the result shows that the proposed method is able to derive the representation of breathing sound signals in a smooth curve and convenient form. Compare to the raw ones, this reconstructed signals will make the peak detection easier. It is expected that this sound-based approach will be a cheap and effective solution for further respiration rate monitoring systems.
Power performance of boundary technique on FOSMC based induction motor drives
Authors: Aditya A W , Utomo R M , Hilmansyah  , Purwanto E , Rusli M R , Praharsena B 
Published: March 2020

Abstract
Power analysis of induction motor (IM) consists of active, reactive and apparent power. Those power related to power factor (PF) which indicate the performance of IM. This paper presented the power analysis and power factor of IM using IFOC system (part of vector control). However, IFOC only provides speed regulation but not the robustness under disturbance. In one hand, FOSMC proposed the robustness against disturbance and stability of the systems. In another hand, FOSMC has the disadvantages in chattering phenomenon which increase power consumption. Boundary technique (BT) designed in FOSMC using sat(.) function to reduce the power consumption. As the results, the BT decreases stator current consumption, active, reactive and apparent power. active power has an average decrease of 13.02 percent in the variable of torque load, reactive power has an average decrease of 10.46 percent and apparent power has 12.11 percent. The stator current has an average decrease of 12.53 percent. At no-load conditions, the average decrease in power consumption is 30.05 percent. This value decreases when the torque load increases.
High voltage capacitor charging system in application of multi-stage coil gun
Authors: Winarno B , Putra R G , Yuwono I , Sumantri B , Gunawan A I 
Published: March 2020

Abstract
High voltage capacitor charging system applied for multi-stage coil consisting of a coil arrangement as a launcher and requires much energy to work. However, large currents and the high voltage required are very limited. High voltage capacitor banks are used as an alternative for energy storage. This capacitor bank is supplied by batteries and requires a charging device. The process of charging a high voltage charging capacitor requires a DC-DC Converter device. In this article, to supply energy to the coilgun, a High Voltage Capacitor Bank is used. 10 capacitors are connected in parallel charging the capacitors with a voltage divider system to avoid swelling at the capacitor charge. This device has been successfully implemented in Multistage Coil Gun. The results achieved indicate an increase in voltage capability up to 1.8 kV DC.
Floating oil skimmer design using rotary disc method
Authors: Supriyono S , Nurrohman D T 
Published: March 2020

Abstract
Over the past few years there have been many oil accidents that have occurred in the sea. Oil accidents can occur due to oil spill, drilling processes at sea or due to pipeline leaks. The oil in the sea will float and if not remove will damage the surrounding ecosystem. Therefore, in this paper implements an oil skimmer system which can be used to remove and separate oil from the water. The oil skimmer system is composed of a rotary disc to take oil on the surface of the water and two propellers to move the oil skimmer. The rotary disc and propeller are driven by DC motor which is connected to the motor driver and Arduino Mega as a controller. The oil skimmer is also equipped with a joystick that is used to adjust the rotation speed of the rotary disc and control the movement of the oil skimmer. Based on the results of testing the oil skimmer has been able to take and separate oil on the surface of the water with separation speed of 620.28 ml/min at a speed of 18 rpm.
Monitoring water quality using star topology wireless sensor networks
Authors: Dwisaputra I , Rolastin B , Afriansyah R 
Published: March 2020

Abstract
The main purpose of this paper is how to implement wireless sensor networks (WSNs) using the star topology for water quality. This system using three devices. Two devices are the data transmitters and one device are the data receiver. Each device uses a NRF24L01 wireless module. There are two sensors that are temperature and Power of Hydrogen (pH) for each transmitter device. Each transmitter device can send temperature and pH data directly to the receiver. Receiver collects data from transmitter and sends it using serial communication to personal computer for monitoring. The result in the experiments is the data can be sent properly. The temperature sensor has an average error of 1.26 percent from 10 different data experiments. Data from the pH sensor test results explain that the pH sensor has an average error rate of 1.88 percent. The wireless module NRF24L01 can transmit data up to a distance of 30 meters. WSNs system using star topology has worked well and can be used in aquaculture ponds.