Page 4 (data 91 to 120 of 256) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 8 9 NEXT >>

91	Energy engineering	ABS-141
Internet Of Things (Iot) For Electric Car Battery Capacity Controller Jefri Lianda, M. Afridon, Zamhuri, Dea Fitriana, Gusti Eviani Bengkalis State Polytechnic Abstract This paper discusses a 58 volt battery voltage control system for electric vehicles using the Blynk application. The research successfully monitors the amplitude of the battery voltage. Additionally, it includes the capability to control the battery via an SSR relay, which is connected to the NodeMCU ESP8266. The Blynk application displays both the amplitude and the percentage of the battery voltage. The NodeMCU ESP8266 has demonstrated reliable performance, maintaining a stable connection as long as it is connected to the internet. The average voltage discrepancy shown on the Blynk application is 0.74%. The SSR relay disconnects the power supply to the electric vehicle when the battery voltage approaches 46.3 volts or when the battery capacity percentage drops to 0.16%. This system ensures that the battery is managed effectively, preventing over-discharge and potential damage by disconnecting the load at critical voltage levels Keywords: Blink, NodeMCU,SSR Relay Share Link | Plain Format | Corresponding Author (Jefri Lianda)

92	Energy engineering	ABS-145
UNDERVOLTAGE BREAKER SYSTEM FOR BATTERY AND DC LOAD SAFETY USING ARDUINO NANO Yoice Putung, Sukandar Sawidin, Muchdar Patabo, Samsu Tuwongkesong Electrical Engineering, Manado State Polytechnic Jl. Raya Politeknik Ds. Buha Kampus Manado PO BOX 1265 Telp. (0431) 815288, 815212, 815217, Fax. (0431) 811568 Abstract Keywords: Arduino Nano, Battery, Relay, Low Voltage Share Link | Plain Format | Corresponding Author (Yoice Putung)

93	Energy engineering	ABS-150
Chance Constrained Control for Minimizing Surge/Swab Effect in Oil-Well Tripping Operation Herman Yoseph Sutarto1,a), Gilang Samudra Kuswana2,b), Singgih Satrio Wibowo3,c) 1Intelligent System, PT Pusat Riset Energi (PRE), Bandung, Indonesia 2Drilling System, PT Pusat Riset Energi (PRE), Bandung, Indonesia 3Aeronautical Engineering, Department of Mechanical Engineering, Politeknik Negeri Bandung, Indonesia Abstract This paper investigated convex chance constrained control of nonlinear dynamical system of axial motion of drill-string in oil well tripping operation. Stochastic nonlinear control framework is presented for control of the probability distribution of system state of axial velocities subject to probabilistic parametric uncertainties while ensuring the satisfaction of constraints in downhole pressure margin with some desired probability levels. The constraint is a nonconvex which greatly complicates the solution of optimization problems. To simplify a convex program, the convex bounding method is proposed and integrated with a robust estimator in order to simplify a convex program and to decrease the computational cost. The capability of stochastic control is demonstrated for tripping out activities with length of drill string 1000 m Keywords: chance constraints, convex optimization, optimal control, tripping operations, surge- swab pressure Share Link | Plain Format | Corresponding Author (Singgih Satrio Wibowo)

94	Energy engineering	ABS-158
Optimization of Flyback Converter with PSO PID Control in Portable Solar Power Systemse Just Try to Submit This Sample Abstract Diah Septi Yanaratri (a*), Irianto (a), Alya Nabilah Hikari (a), Sutedjo (a), Renny Rakhmawati (a), Ahmad Firyal Adila (a) (a) Industrial Electrical Engineering, Departement of Electrical Engineering, Politeknik Elektronika Negeri Surabaya *diahsepti[at]pens.ac.id Abstract This research presents the design and development of a portable solar power plant for supplying mobile chargers and lighting, based on a flyback converter with a PSO-PID controller. The flyback converter is chosen for its reliability in power conversion applications, while the PID controller is optimized using the Particle Swarm Optimization (PSO) algorithm to achieve high system efficiency. The PSO-PID controller is designed to reduce overshoot, settling time, and steady-state errors while maintaining a stable output voltage. Simulations using Matlab demonstrate that this approach effectively enhances system performance, reduces output voltage fluctuations, and ensures reliable power supply. Compared to the Ziegler-Nichols and trial-and-error methods, the PSO tuning method shows superior performance, maintaining a constant voltage of 14V for battery charging with an average efficiency of 92.93%. This portable solar power plant can also be easily mobilized to remote areas and used as an emergency power source. The results indicate that this integration provides an innovative and efficient solution for portable energy needs. Keywords: Flyback Converter, PSO, PID, Portable Solar Power Plant Share Link | Plain Format | Corresponding Author (Diah Septi Yanaratri)

95	Energy engineering	ABS-176
Analysis of the Effect of Blade Profile on the Performance of Wells Turbine as Wave Energy Converter with CFD Method Muhammad Anis Mustaghfirin (a*), Jeheskiel Surbakti (b), Niki Veranda Agil Permadi (b) a) Sustainable Energy Engineering Study Program - Shipbuilding Institute of Polytechnic Surabaya *mustaghfirin[at]ppns.ac.id b) Marine Engineering Study Program - Shipbuilding Institute of Polytechnic Surabaya Abstract Oscillating water column (OWC) is one of power generator devices that converts ocean wave energy into electrical energy. The motion of ocean waves will push the air in the OWC column and rotate the Wells Turbine connected to the generator to produce electricity. Previous research analyzed the performance of Wells Turbine with NACA 0015 blade profile. However, the torque coefficient (C_T) value generated by the blade profile was not optimal and could still be developed with several variations. Based on these conditions, this research is proposed to analyze the influence of blade profiles on the Wells Turbine performance using the Computational Fluid Dynamics (CFD) method. Various blade profiles are utilized such as NACA 0012, NACA 0015 and NACA 0018 accompanied by chord lengths of 100 mm, 125 mm, and 150 mm. The result shows that NACA 0018 blade profile with 150 mm chord length improves the torque coefficient (C_T) and power coefficient (C_P) 36.28% and 1.04%, respectively, compared to other configurations Keywords: Ocean Energy, Oscillating water column, Well Turbine, NACA Share Link | Plain Format | Corresponding Author (Muhammad Anis Mustaghfirin)

96	Energy engineering	ABS-200
Implementation of Rectenna for Energy Harvesting Applications at frequency 2300 MHz Abstract Okkie Puspitorini, Nur Adi Siswandari, Ari Wijayanti, Karimatun Nisa Department of Electrical Engineering Politeknik Elektronika Negeri Surabaya Surabaya, Indonesia Abstract In this study, a rectifier circuit has been designed for energy harvesting applications. This rectifier circuit is designed to be 3-state and coupled with a current amplifier circuit. The addition of the current amplifier circuit aims to increase the output and reduce the complexity of the design. In the application and testing of this rectifier system will get input signals from 4x4 microstrip antennas. The test results show that the 4x4 array produces an output of 3.88 V smaller than input from signal generator because of propagation effect. The antenna position and polarization as well as the distance of the receiving antenna to the BTS source are also very influential on the application of energy harvesting. This shows that the input stability of the rectifier plays an important role in harvesting energy applications. Keywords: Radio frequency, Energy Harvesting, Rectenna, RectifierTry to Submit This Sample Abstract Share Link | Plain Format | Corresponding Author (okkie puspitorini)

97	Energy engineering	ABS-203
Analysis of the Impact of Boiler Performance Due to the Addition of Water Tubes in a Vertical Fire-Tube Boiler with a Steam Capacity of 100 Kg/Hour Beni Syahputra(1), Khairudin Syah(2), Aprijal Gultom(3), Abdul Gafur(4) Politeknik Negeri Bengkalis Abstract Keywords: fire tube boiler , Water Tube boiler, Boiler performance, efficiency Share Link | Plain Format | Corresponding Author (Beni Syahputra)

98	Energy engineering	ABS-204
ANALYSIS OF THE TRANSMISSION SYSTEM IN A 2010 HONDA BEAT ELECTRIC MOTORCYCLE Abdul Gafur(1), Imran(2), Vebritasari(3) politeknik Negeri Bengkalis (1)(2), Universitas Pahlawan Tuanku Tambusai Abstract With the advancement of technology and the growing awareness of environmental protection, electric motorcycles are becoming increasingly popular as eco-friendly alternatives to conventional motor vehicles. The modification of the 2010 Honda Beat is one such electric motorcycle model that has gained public attention due to its attractive design and reasonably good performance. However, despite the rising popularity of electric motorcycles, there are still some technical aspects that need further analysis to ensure optimal performance. One important component in a motorcycle is the transmission system. The transmission system functions to convert engine power into motion at the drive wheel. The cause of slipping that occurs in the 2010 Honda Beat electric motorcycle is overly loose tension. In the 2010 Honda Beat electric motorcycle, the transmission system has been changed from a belt drive transmission to a sprocket transmission system, with a ratio of 15 teeth on the front sprocket and 32 teeth on the rear sprocket, resulting in a sprocket ratio of 2.128. The chain speed is 7.7 m/s with 76 chain links or a length of 84.22 cm. The transmission system on this electric motorcycle uses a number 40 single-chain drive. Keywords: Transmission, Honda Beat 2010, Electric Motorcycle, Transmission System, Slip, Belt Drive, Sprocket Share Link | Plain Format | Corresponding Author (Gafur Gafur)

99	Energy engineering	ABS-213
Determining Surrounding Atmospheric Pressure Using The Van der Waals Gas Approach in Boyle^s Law Experiments Ratu Fenny Muldiani (a), Kunlestiowati Hadiningrum (b), Defrianto Pratama (c*), Nani Yuningsih (d), I Gede Rasagama (e), Yunita Citra Dewi(e), Achda Fitriah(e) (a) Energy Conversion Engineering, Politeknik Negeri Bandung, Indonesia (b) Chemical Engineering, Politeknik Negeri Bandung, Indonesia (c) Electrical Engineering, Politeknik Negeri Bandung, Indonesia *defrianto.pratama[at]polban.ac.id (d) Refrigeration and Air Conditioning Engineering, Politeknik Negeri Bandung, Indonesia (e) Mechanical Engineering, Politeknik Negeri Bandung, Indonesia Abstract Boyle^s Law, which describes the inverse relationship between gas pressure and volume at constant temperature, is a key principle in the study of ideal gases. However, real gases do not always conform to these ideal gas assumptions. This study seeks to achieve a more precise measurement of external air pressure by employing the Van der Waals gas equation in experiments involving Boyle^s Law. Pressure measurements from air columns trapped in U-tubes were analyzed using both the ideal gas model and the Van der Waals model. The findings show that the Van der Waals model offers a more accurate estimate of external air pressure, with a relative error of 0.40%, whereas the ideal gas model shows a relative error of 10.19%. Consequently, using the Van der Waals equation is recommended for Boyle^s Law experiments to enhance the accuracy of the results. Keywords: Boyle^s Law- Ideal Gas- Van der Waals- Atmospheric Pressure- Share Link | Plain Format | Corresponding Author (Defrianto Pratama)

100	Energy engineering	ABS-222
Optimizing The Design of Single-Phase Permanent Magnet Generator Resulting from Modification of Single-Phase Induction Motor I Made Wiwit Kastawan1, a), Rusmana 2), Rahmat Hidayat 1) 1 Study Program of Energy Conversion Engineering, Department of Energy Conversion Engineering, Politeknik Negeri Bandung, Indonesia 2 Study Program of Electrical Power Plant Technology, Department of Energy Conversion Engineering, Politeknik Negeri Bandung, Indonesia Abstract Having a similar construction, a single-phase induction motor can be operated as a single-phase generator simply by embedding permanent magnet pole in its rotor. Shape and number of permanent magnet pole as well as number and pattern of winding inserted in stator slot will strongly affect the generator output voltage. In this paper, three possible designs of single-phase permanent magnet generator resulting from modification of single-phase induction motor are proposed. The output voltage of each single-phase permanent magnet generator is analyzed based on its simulated flux distribution. Results show that both the 10 poles, 5 windings and 12 poles, 6 windings generator designs give nearly pure sinusoidal output voltage waveform with low percentage of total harmonic distortion (THD) of 2.85% and 2.34% respectively. The 10 poles, 5 windings generator able to generate output voltage with magnitude of 126.48 V while the 12 poles, 6 windings generator able to generate output voltage with magnitude of 130.57 V. However, the 8 poles, 4 windings generator design gives non-sinusoidal output voltage waveform with a relatively high THD of 8.02%. Also, this generator design generates a lower output voltage magnitude of 114.11 V Keywords: harmonics, modification, output voltage, permanent magnet, single-phase generator, single-phase motor Share Link | Plain Format | Corresponding Author (I Made Wiwit Kastawan)

101	Energy engineering	ABS-238
Multi-Objective Optimization of Central Air Conditioning Unit Performance by Respons Surface Method (RSM) Muhammad Nuriyadi, Muhammad Akmal, Sunardi Politeknik Negeri Bandung, Refrigeration and Air conditioning Department. Jl. Terusan Gegerkalong Hilir, Bandung 40559. Abstract Optimizing AC system performance is important to optimize energy consumption, especially at partial load. This research used experimental methods and Response Surface Methodology (RSM) to optimize AC system performance based on operational conditions that change over time. The aim of this research was to obtain a performance model of the central AC system based on its operational conditions which include environmental air conditions, heat load conditions and other operational parameters, so that the performance of the AC system can be optimized which includes cooling capacity, power consumption and energy efficiency ratio (EER). Data is obtained by experiment, then analyzed by Response Surface Methodology (RSM) to obtain optimal system performance. This research resulted in models of AC performance with coefficient of correlation (R2) of 0.9745, 0.2041 and 0.8965 for cooling capacity, power consumption and EER respectively. By analysis of varians for models, it is obtained that Model F-values are 9920.83, 313.45, and 2245.59 for cooling capacity, power and EER respectively, and implied that the models are significant. The Adequate precision ratios were 1078.33, 93.08, and 344.32 for those parameters respectively, and indicated the adequate signals. Keywords: Optimization, AC Performance, RSM Share Link | Plain Format | Corresponding Author (Muhammad Nuriyadi)

102	Energy engineering	ABS-240
Investigation of power-produced Axial Turbine Flow in Organic Rankine Cycle Systems based on Numerical Study Raihan Arief Adrianto, Veren Anggun Sindu Riesath, Albait Malikul Izzat, Haolia Rahman, Fitri Wijayanti, Gun Gun Ramdlan Gunadi Politeknik Negeri Jakarta Abstract Keywords: Organic Renkine Cycle, R1432a, axial turbine Share Link | Plain Format | Corresponding Author (Gun Gun Ramdlan Gunadi)

103	Green Infrastructure	ABS-275
5.8 GHz Microstrip Antenna Design for Dedicated Integrated Short Range Communication System in Smart Port Mohammad Basuki Rahmat1, a), Yuning Widiarti1, b), Eko Setijadi2, c), Azlina Idris3, d), Aidatul Julia3, e), Shipun Anuar Hamzah4, f), Nurhayati5, g), Sri Wiwoho Mudjanarko6, h), Keinan Shofiandieni Haryo Putri1, i) Jurusan Teknik Kelistrikan Kapal, Politeknik Perkapalan Negeri Surabaya. Jl. Teknik Kimia, Surabaya, Indonesia 60111 2Departemen Teknik Elektro, Institut Teknologi Sepuluh Nopember, Jl. Teknik Kimia, Surabaya, Indonesia, 60111 3School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, Jalan Ilmu 1/1, 40450 Shah Alam, Selangor, Malaysia 4Department of Electronic Engineering, Faculty of Electrical Engineering and Electronic Engineering, Universiti Tun Hussien Onn Malaysia, Persiaran Tun Dr. Ismail, 86400 Parit Raja, Johor, Malaysia 5Departemen Teknik Elektro, Universitas Negeri Surabaya, Jl. Ketintang, Gedung A5, Surabaya, Indonesia, 60231 6Universitas Narotama, Jl. Arif Rahman Hakim No. 51, Surabaya, Indonesia, 60117 Abstract The development of the industrial revolution 4.0 has trigerred rapid technological innovation, including in ports. Ports are currently required to change the way they operate in order to quickly handle traffic flows at the ports. Such transformation requires the development of smart port system that will reduce port user response time. Increase port asset utilization, and improve maritime logistics visibility by automating and digitally integrating end-to-end port operations without human intervention. One of the technologies being developed is dedicated short range communication (DSRC). A technology that enables communication in current and future ports environment for various application, such as improving safety and mitigating traffic congestion. This article describes the development of a microstrip antenna to support a DSRC system whose characteristics are in line with vehicle communication standard. The proposed Antenna has sufficient bandwidth to cover the current 5.8 GHz DSRC band and the futurre 5.9 GHz band for next generation DSRC Communications Keywords: smart,ports, antenna, DSRC Share Link | Plain Format | Corresponding Author (Mohammad Basuki Rahmat)

104	Green Infrastructure	ABS-21
Color Recognition of Rice Plant Leaves to Monitor Rice Plant Growth with Drones using Deep Learning Mochammad Zen Samsono Hadi- Syifa Aulia Widya Ananda- Mike Yuliana Politeknik Elektronika Negeri Surabaya Abstract Rice is an important crop as a staple food source in Indonesia and even around the world. The vast rice farmlands in Indonesia are present to fulfill the need for rice in this country and even in foreign countries. However, in rice farming, there are three growth phases that must always be observed by rice farmers for a successful harvest, namely the vegetative, generative, and ripening phases. The vast amount of agricultural land owned by farmers, especially those who have more than one land, is certainly very labor-intensive if they have to carry out regular monitoring every day. Therefore, in this research, an automatic system is made to monitor the growth of rice plants using the Deep Learning MobileNet algorithm. This system will classify aerial images that have been taken using drones into four color classes according to the leaf color chart. The total dataset will be divided into 3 parts for training, validation, and testing with a ratio of 70- 20- 10. The testing is done with five test scenarios by changing the learning rate parameters. There is a decrease in loss with every change in learning rate. It can be observed that the learning rate of 0.005 has the lowest loss value and has the highest AP and AR values. The more the number of iterations or num step, the loss value is closer to zero. The iteration 30000 at learning rate 0.005 has the lowest loss value. Keywords: Deep Learning, MobileNet, monitoring rice plant growth Share Link | Plain Format | Corresponding Author (Mochammad Zen Samsono Hadi)

105	Green Infrastructure	ABS-28
CAPACITY OF PRECAST HYBRID WITH COLD FORM STEEL (CFS) TRUSS SYSTEM Andreas Rudi Hermawan (a), Suripto (a), Yanuar Setiawan (a*), Eka Sasmita Mulya (a) a) Departement Civil Engineering, Politeknik Negeri Jakarta Jalan Prof. Dr. G. A. Siwabessy, Depok 16425 *yanuar.setiawan[at]sipil.pnj.ac.id Abstract A faster, safer, more comfortable, and more economical construction method is increasingly needed. Therefore, this research introduces an innovative method and system for construction, focusing on a precast hybrid beam with a cold-formed steel (CFS) truss system. The testing method was applied to two loads at two points at the top of beam and truss refer to ASTM C78-02. The aim of the research was to decide flexural strength, maximum moment and deflection of that beam and truss. The specimens consisted of precast hybrid with cold form steel (CFS) truss system P1 and P2 and CFS system truss non-concrete T1 and T2. The research has resulted in the deflection of Precast Hybrid Beam with CFS Truss System P1 of 9,97 mm at a maximum moment of 3760,54 Kg-m and deflection of Precast Hybrid Beam with CFS System Truss P2 of 8,44 mm at a maximum moment of 3857,11 Kg-m. From the data, the deflections have resulted in CFS System Truss T1 of 9,67 mm at a maximum moment of 738,07 Kg-m and the deflection of CFS System Truss T2 of 16,68 mm at a maximum moment of 606.54 Kg-m. Precast hybrid beam with CFS System Truss behaves as a normal beam and has enough ductility with &#948-u/&#948-y 1,83 for specimen P1 and 1,71 for P2. The conclusion is that precast hybrid with CFS truss system P1, P2 have moment capacity 5,67 times of moment capacity of T1, T2 having significant enhance. Keywords: Precast, concrete, hybrid, ductile, cold form steel Share Link | Plain Format | Corresponding Author (Yanuar Setiawan)

106	Green Infrastructure	ABS-58
Implementation of UAV LiDAR for Surveying Pavement Conditions Covered by Different Vegetation Densities Hana Fitri Khairani (a), Yackob Astor (a*), Nabyl Rizky Dwiyuda (a), Aditia Febriansya (a), Linda Aisyah (a), Risma Nur Indah (a), Atmy Verani Rouly Sihombing (a), Master Jimmy Dekha Syaputra (b) a) Department of Civil Engineering, Politeknik Negeri Bandung, Bandung 40559, Indonesia *yackobastor[at]polban.ac.id b) PT. Oseanland Survei Indonesia, South Tangerang 15220, Indonesia Abstract Indonesia is a tropical country with high rainfall, resulting in the easy growth of vegetation, including along road edges. This condition poses a major challenge during road condition surveys using UAVs. Previous research has shown that several types of road damage along the road edges are covered by vegetation, making it difficult to identify and measure the dimensions of the damage. To overcome this challenge, road condition data was collected using a UAV equipped with Light Detection and Ranging (LiDAR) technology. The research object was a 200 meter road segment classified into two types based on vegetation density: sparse (0-35%) and dense (>70%). The research results indicate that UAV LiDAR can only be used to map roads with sparse vegetation (22.89%) and cannot yet be used for road condition surveys. Therefore, a survey was conducted using another laser scanner, the SLAM Scanner, which operates more flexibly, is portable, and can be used under vegetation. The road condition survey results using the SLAM Scanner were 94.61% similar to the manual survey results, compared to 86.52% for the UAV LiDAR survey. Thus, the SLAM Scanner has significant potential as a tool for surveying road conditions. Keywords: UAV LiDAR, SLAM Scanner, Vegetation Density, Road Condition Survey Share Link | Plain Format | Corresponding Author (Hana Fitri Khairani)

107	Green Infrastructure	ABS-74
Optimization of the Height to Span Ratio of Steel Truss Bridges Based on Internal Force and Weight of the Structure Wulan Sari (a*), Ambar Susanto (a), Riawan Gunadi (a), Arvila Delitriana (b) a) Department of Civil Engineering, Faculty of Civil Engineering, Politeknik Negeri Bandung, 40559 Bandung Barat, Indonesia *ettianasari[at]gmail.com b) PT. Cipta Graha Abadi, 40134 Kota Bandung, Indonesia Abstract Steel truss bridges are one of the most common types of bridge found in Indonesia after prestressed concrete bridges. Ease of construction is the main advantage of this bridge. In the other hand, the weakness of truss bridges is the efficiency of using trusses which depends on the required length of the bridge span. The longer the span, the higher the frame required to keep the stiffness of the bridge structure. Therefore, optimization is needed in the use of truss height relative to the span. The aim of this optimization is to obtain optimal structural weight without disrupting the performance of the bridge structure. From the results of comparative study condutcted in this research, it was found that the height to span ratio for warren type steel truss bridges at the most optimum strength conditions was 0.14 in terms of internal force and weight of the structure. This ratio is able to reduce frame requirements by 22% of the average structural weight of the 4 ratio variation analyzed Keywords: Optimazation- Steel Truss Bridges- Weight Of Structure- Rise to Span Ration- Internal Force Share Link | Plain Format | Corresponding Author (Wulan Sari)

108	Green Infrastructure	ABS-167
Effect of Fermentation Time on Yield and Caffeine Content of Fermented Coffee Andi Maryam, Junardi, Angga Tritisari, Ellys Mei Sundari Politeknik Negeri Sambas Abstract This study aims to analyze the effect of fermentation time on yield and caffeine content in coffee beans. Coffee beans were fermented using lactic acid bacteria Lactobacillus plantarum and Streptococcus cerevisiae with fermentation time variations of 36 hours, 48 hours, and 60 hours. The results showed that the longer the fermentation time, the coffee yield tended to decrease, with a significant decrease at 36 and 48 hours of fermentation. However, at 60 hours fermentation, the yield experienced a slight increase compared to the previous fermentation. Caffeine levels also showed a decrease with increasing fermentation time. The highest caffeine level was found in the control treatment (without fermentation) at 0.109%, which decreased to 0.062% after 60 hours of fermentation. Coffee fermentation was shown to be effective in reducing caffeine levels without reducing the flavor characteristics of coffee, thus it can be a potential method to produce low-caffeine coffee that is more preferred by consumers. This study makes an important contribution to the development of coffee processing methods that can improve the sensory quality and selling value of coffee. Keywords: yield, caffeine, fermented coffee Share Link | Plain Format | Corresponding Author (Andi Maryam)

109	Green Infrastructure	ABS-170
ARTIFICIAL LIGHTING IN THE EXAMINATION ROOM IN HOSPITAL BUILDING Dyah Nurwidayningrum, Sumargana Politeknik Negeru Jakarta Abstract Lighting plays a very important role in hospital buildings. Daylighting cannot fully meet the need for an examination room in 24 hours. Therefore, artificial lighting is an alternative to meet these needs. This study aims to optimize the average value of artificial lighting in the Hermina Galaxy Hospital building. For the examination room, the focus is on the patient^s bed area. The study used the simulation method using Dialux Evo 12.1. Simulation samples were taken on the 3rd floor. The standard used is SNI 6197:2020 with the provision that the lighting intensity is 350 lux. The conclusion of this study is the optimization of artificial lighting by moving the interior closer to the lights in the room or increasing the power of the lights. The results of this study show that the average value in the room ranges from 200-300 lux with 13-watt LED downlights and 40-watt panels from 19 rooms. Based on this, it is necessary to add watts to the CoreLine Slim Downlight lamp specifications type DN135B D165 1 x LED10S/840 13 watts to 19.8 watts so that artificial lighting at night can meet the SNI 6197:2020 standard. Keywords: Examination Room- Artificial Lighting- Lighting Simulation Share Link | Plain Format | Corresponding Author (Dyah Nurwidyaningrum)

110	Green Infrastructure	ABS-186
The Effect of Geometric Condition on Road Pavement Condition Muhammad Raihan Nugraha, Alya Azzachra, Yackob Astor, Atmy Verani R S Politeknik Negeri Bandung Abstract Lemahnendeut is a road located in Bandung City. The condition of the road surface on this road has experienced significant damage. Additionally, Lemahnendeut road features a curve combined with a descent, specifically in front of Sari Ater Kamboti Hotel. Therefore, this study will analyze the geometric conditions according to the Geometric Design Guidelines for Roads Number 20/Se/Db/2021 and will evaluate the road surface, followed by an analysis of the impact of geometric conditions on the road surface. Based on calculations according to PDGJ 21, the curve on Lemahnendeut road should be of the Spiral Circle Spiral (SCS) type. However, based on the existing condition analysis, all curves on this road are of the SCS type. There is 1 curve with the FC type and 2 curves with the SCS type, and there are components of the curves that do not meet the minimum criteria required. The assessment of the road surface based on the Pavement Condition Index (PCI) method concludes that the road is in good and very good condition, while the International Roughness Index (IRI) method concludes that the road is in lightly damaged and severely damaged condition. Statistical analysis in the form of correlation and regression tests of geometric variables (slope, R, superelevation) against the surface conditions (PCI and IRI) shows no relationship or effect of geometry on PCI, but there is a very weak correlation and effect of geometry on IRI. Keywords: Correlation, Geometric, Street, Pavement Share Link | Plain Format | Corresponding Author (Alya Azzachra)

111	Green Infrastructure	ABS-188
Mechanical properties and environmental assessment of low carbon concrete containing limestone powder and high-volume fly ash Steve Supit (1a), Dwars Soukotta (2b), Artian Sirun (3c), Priyono (4d), Sintia Korompis (5e), Rudolf Mait (6f) 1,2,3,4,5,6 Manado State Polytechnic, Jl. Raya Politeknik Kel. Buha, Manado 95252, Indonesia a) Corresponding author: steve.supit[at]sipil.polimdo.ac.id b) dwarssoukotta[at]gmail.com c) sirunartian[at]yahoo.co.id d) priyonosst[at]gmail.com e) sintiapolimdo[at]gmail.com f) rudolf.mait[at]polimdo.ac.id Abstract This paper reports the experimental evaluation on mortar containing limestone and high-volume fly ash as a replacement of cement to produce a low-carbon concrete for green infrastructure. In this experiment, mortar containing different percentages of limestone was tested to gain the mixture that exhibited highest influence based on the 7th day of compressive strength. The results gained from the tested mortar were then used to evaluate the compressive strength, tensile strength, and water sorptivity of concrete. The estimation of the carbon emission produced by different types of mixture proportions was also presented in this study. Based on the results, the improvement of compressive strength can be expected when replacing cement with limestone powder with the maximum percentage used was found in a mixture with 15% replacement of cement. When adding the 15% limestone in high-volume fly ash i.e., 40%, 50%, and 60%, the strength was found to be lower. However, the results on water sorptivity showed that using limestone combined with 40% fly ash can produce a comparable result with the normal concrete. The environmental assessment shows the potential of reducing CO2 emissions by replacing cement at the high-volume fly ash with the percentage of 40%. The research outcomes would be more on the potential contribution to produce environmentally friendly concrete to support the zero emissions goal in the construction field. Keywords: Limestone- High-volume fly ash- Low carbon- Concrete- Infrastructure Share Link | Plain Format | Corresponding Author (STEVE WILBEN MACQUARIE SUPIT)

112	Green Infrastructure	ABS-201
The Relationship Between Indoor Air Quality (IAQ) and Sick Building Syndrome (SBS) in Industrial Building Arie Dipareza Syafei, Athalia Salsabila Budiyanto, Fathiah Mohamed Zuki, Joni Hermana, Abdu Fadli Assomadi Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia and Department of Chemical Engineering, Universiti Malaya, Kuala Lumpur, Malaysia Abstract Human activities that were done inside a building appear to be affecting the Indoor Air Quality (IAQ) in many aspects. Health problems may occur due to a poor IAQ, which results in Sick Building Syndrome (SBS). The main objectives of this research are to identify the effect of indoor air quality associated with sick building syndrome in PT XYZ, compare the IAQ parameters obtained to the regulation of air quality standards, and investigate the appropriate control measures. A cross-sectional method is conducted on 79 respondents of employees to investigate the correlation between SBS occurrence and IAQ parameters. The data sampling collection is conducted by using IQAir Visual Pro and lux meter. The result shows that the PM2.5 concentration, temperature, and CO2 concentration in three sessions are complying with the quality standard, while humidity and lighting do not comply. Furthermore, it shows an insignificant correlation between IAQ parameters and SBS in the midday and afternoon, but a significant correlation on PM2.5 and CO2 concentration in the morning with the respective significance value of 0.003 and 0.039 (p<0.05). It is figured that disease history, research limitation, and other IAQ parameters aspects are confounders in analysing the correlation between IAQ and SBS occurrence. Keywords: Air Quality Standard, Indoor Air Quality, Lux Meter, Sick Building Syndrome Share Link | Plain Format | Corresponding Author (Arie Dipareza Syafei)

113	Green Infrastructure	ABS-202
The Effect Of Ventilation And Occupant Activities Towards Indoor Air Quality In Residental House For Fine Particulate Arie Dipareza Syafei, Dessy Farihi Nabila, Wanda Nabila Arisani, Joni Hermana, Abdu Fadli Assomadi, Arry Febrianto Department of Environmental Engineering, Faculty of Civil, Planning, and Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia Abstract Indoor air quality is important because it is related to human health. One of the factors that can affect indoor air quality is ventilation and occupant activities. Poor air quality can cause respiratory problems and sick building syndrome. One of the harmful pollutants that affects human health is PM2.5. This study aims to evaluate the quality of PM2.5 within indoor air against quality standards and determine the ventilation and occupant activities that affect the concentration of PM2.5. Primary data sources were obtained by measurements and questionnaires. Eleven houses (11) were sampled on 2 weekdays and 1 weekend. PM2.5 concentration measurements were carried out indoors and outdoors. The method in this study uses multiple linear regression analysis through the SPSS application. The concentration of PM2.5 indoors and outdoors has a moderate to strong correlation due to window opening activities. Fan usage time has a significant effect on reducing the concentration of fine particulates. The amount of furniture is also one of the factors that increase the concentration of fine particulates. The activity of opening a window has two effects, it can increase or decrease concentration. Further research is needed to observe the window opening to confirm the results of this study. Keywords: Fine Particulates, Indoor Air Quality, Ventilation Share Link | Plain Format | Corresponding Author (Arie Dipareza Syafei)

114	Hydrology	ABS-51
Flow Modelling in River Confluence using HEC-RAS2D I Gede Tunas (a), Rudi Herman (a), Yassir Arafat (a) a) Department of Civil Engineering, Universitas Tadulako, Jalan Soekarno-Hatta Km. 9 Palu, Central Sulawesi, 94117, Indonesia Abstract The flow in river confluence is a very interesting phenomenon to study. The flow characteristics are greatly influenced by various factors: the discharge from both rivers, the angle of river confluence, the elevation of the bed of both rivers at the confluence and the concentration of sediment. These factors can affect the flow and configuration of the river bed. This paper aims to study the flow characteristics at the river confluence of Sombe - Lewara River and Palu River, Central Sulawesi Indonesia. The study was performed using HEC-RAS2D Model based on DEM data from LiDAR coverage as the source of model geometry data. Other important data as boundary conditions consist of design discharge at the upstream boundary and normal depth at the downstream boundary. Manning^s roughness coefficient and infiltration rate of the domain are expressed as land cover layer and infiltration layer in RAS Mapper. Previously, calibration was applied to determine the optimal Manning^s roughness coefficient by evaluating the deviation of observed and measured water levels at control points. The results of the study are presented in three parameters: flow depth, velocity and water surface elevation. It is seen that the flow velocity weakens at the flow confluence line and gradually normalizes at a distance of about 30 meters downstream. The maximum velocity on the left and right sides of the flow confluence line reaches 3.5 m/sec and 5.7 m/sec respectively depending on the discharge in each river branch. The flow depth on the right side is greater and the left side is in accordance with the discharge and size of the river cross-section. The conclusion of this study is that the flow velocity and depth are predominantly influenced by the discharge and cross-section geometry. Keywords: flow velocity- water depth- water surface elevation, RAS Mapper Share Link | Plain Format | Corresponding Author (I GEDE TUNAS)

115	Hydrology	ABS-79
Design of Bagan Benio Ambulance Air Ship for Health Service Facilities and Emergency Muhammad Sidik Purwoko, Nurhasanah, Muhammad Ikhsan Politeknik Negeri Bengkalis Abstract Bagan Benio has three administrative villages covered in the Bengkalis Regency region. the dearth of fitness services in Bagan Benio makes citizens with essential health situations noted the health facility, that is placed some distance and tough to reach, with the unavailability of scientific transportation, in particular for crossing from Bagan Benio to Tasik Serai or additionally to Siak, (Water Ambulance) is based on the aim of effectively dealing with emergency sufferers with a speedy reaction in order to lessen mortality and incapacity in patients. SEA (secure Escorting Ambulance) is the improvement of a water ambulance by way of wearing out the basic principles of emergency coping with, the hamlet is far from the mainland, and coming into the vicinity should journey very far, and skip via the Siak River. From Tasik Serai Village, it will take about one hour to discover Bagan Benio Hamlet by using using a boat (the language of neighborhood people) and passing the Siak River. The reason of this research is to layout an ambulance deliver to guide the desires as meant with the ability of the approach used on this layout the use of a contrast ship primarily based on the consequences of the analysis obtained an ambulance deliver with the main size with a LOA price of 7.5 m, LPP 7,2 m, H 2 m, T 1 m, Cb 0,6, speed 30 Knot, figuring out the value of ship resistance that is 8.9 KN, for the deliver^s propulsion engine based on BHP the results received are 132.584 HP Keywords: Bagan Benio, Ambulance air ship, health centers, Ship Resistance Share Link | Plain Format | Corresponding Author (Muhammad Sidik Purwoko)

116	Hydrology	ABS-118
Numeric Resistance Analysis of New Hull Design for Amphibious High-Speed Craft Romadhoni 1, a), Fazrian1, b) Husnul Khotima 1, c) Suzdayan 2, d) and Aprizawati2, e) Polytechnic of Bengkalis Abstract Amphibious High Speed Craft (AHSC) is a new type of water and land transportation model, which is currently being designed for special purposes. In planning the analysis, resistance is one of the main factors that can be analyzed. The amount of power is of course greatly influenced by fuel consumption while sailing. The Amphibious High Speed Craft (AHSC) model optimization design which chooses a small resistance value is the focus point in the design process. In this research, the total resistance optimization method has been carried out on a numerical basis. The main parameters for the design of the flat plate hull, planing hull and cathedral hull models have the same displacement of 1,725 tons. From the calculation results can be obtained ratio of pressure and frictional resistance to total resistance is about 16% and 60%, respectively, up to Fn=0.8, but becomes 60% and 75%, respectively, at the highest Fn as a result of increasing the pressure component, which was most likely caused by the large cooling of the free surface around the Amphibious High-Speed Craft (AHSC) hull. The flat plate bow hull design and the planing bow hull design have greater resistance to impact and pressure compared to the cathedral bow hull design. The total bow resistance of the cathedral hull is 22.22% and 3.46% lower than the flat plate and planing hull bow designs respectively at service speed. Keywords: Amphibious, resistance, numeric, design, high speed craft Share Link | Plain Format | Corresponding Author (romadhoni romadhoni)

117	Hydrology	ABS-181
Optimization of Tunnel Propeller Design for Polbeng II Ship Jupri, Siswandi. B, Afriantoni, Padzi Hanif Dept. of Naval Architecture State Polytechnic of Bengkalis Bengkalis, Indonesia 28712 Abstract In the context of the Polbeng II ship, the addition of a tunnel propeller component has the potential to provide significant benefits in enhancing the ship^s performance in terms of speed and efficiency. By understanding the theoretical foundations and operational principles of tunnel propellers, it is hoped that subsequent research and development can optimize the application of this technology to achieve the best possible results in improving the overall performance of the vessel. The tunnel design examined in this study compares two design models: 50%D and 20%D, relative to the distance from the rudder. The results obtained from these two design models are as follows: the 50%D model tunnel has a flow pressure value of 99.119 pascals and a flow velocity value of 2.035 m/s, while the 20%D model tunnel has a flow pressure value of 96.819 pascals and a flow velocity value of 2.024 m/s. Keywords: tunnel design, polbeng II ship, propeller Share Link | Plain Format | Corresponding Author (Mr Jupri)

118	Hydrology	ABS-249
Water allocation management in Karangmumus sub-basin using river flow hydrology approach Tommy Ekamitra Sutarto (a*), Freddy Barus (a) a) Civil Engineering Department, Politeknik Negeri Samarinda, Kampus Gunung Panjang, Jalan Dr. Cipto Mangunkusumo, Samarinda 75131 *tommysutarto[at]polnes.ac.id Abstract The Karangmumus sub-watershed is part of the Mahakam watershed. The total area of Karangmumus sub-watershed is 32,196.3 ha. In terms of the Karangmumus sub-watershed, water withdrawals are more dominant to meet household needs, irrigation, industry, and river maintenance. While the needs of livestock, fisheries, plantations and energy do not yet exist or the withdrawals are very small. Currently, the dependable discharge of the Karangmumus River from year to year tends to decrease due to the degradation of water catchment areas in the upper part of the Karangmumus sub-watershed. It is not uncommon in certain months for the Karangmumus River water to be so limited that the local PDAM is unable to meet the clean water demand of the population and have a medium class of potential drought hazard. An investigation has been made to solve this problem by dividing into dry, normal, and wet scenarios. A water management system is needed to manage the water balanced, on this investigation agreed water allocation management system by following the normal water condition scenario, the reliability (probability of fulfillment) of normal water allocation conditions is 50%. Keywords: Dependable discharge, Scenarios, The Karangmumus sub-watershed, Water balance, Water management. Share Link | Plain Format | Corresponding Author (Tommy Ekamitra Sutarto)

119	Materials Science	ABS-4
RHEOLOGICAL OBSERVATIONS AND ELASTIC MODULUS DUE TO COMPACTION TEMPERATURE OF CARBON COMPOSITES - LLDPE Agus Edy Pramono, Tatun Hayatun Nufus, Ahmad Maksum, Anissa Puspa Dewi, Yohannes Patrick, Subyakto 1) Magister Program in Applied Manufacturing Technology Engineering, Politeknik Negeri Jakarta, Jl. Prof. Dr. G.A. Siwabessy, Kampus UI, Depok 16425, Jawa Barat, Indonesia 2) Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Jl. Raya Bogor Km 46, Cibinong, Bogor, Jawa Barat, Indonesia Abstract Keywords: carbon-LLDPE composite- rice husks carbon- heat compaction- elasticity modulus- rheological Share Link | Plain Format | Corresponding Author (Agus Edy Pramono)

120	Materials Science	ABS-267
The Impact of Effective Microorganism (EM4) on Recycled Concrete Strength Luthfi Muhammad Mauludin (a*), Yackob Astor (a), Ery Radya Juarti (a), Ridho Septian (a), Muhammad Rayhan Asy Syukri (a), Wulan Maharani (a), Abdul Rahman Mohd Sam (b) a) Department of Civil Engineering, Politeknik Negeri Bandung, Gegerkalong Hilir Street, Bandung, 40559, Indonesia *luthfi-mm[at]polban.ac.id b) Faculty of Civil Engineering, Universiti Teknologi Malaysia, Iman Street, Skudai Johor, 81310, Malaysia Abstract Concrete is widely used in construction, but it is prone to cracking, especially in unreachable areas. This research explores self-healing concrete (SHC) as a solution to automatically repair these cracks. Additionally, the research addresses the challenge of construction waste by investigating the use of recycled concrete as a substitute for coarse aggregate. The goal is to create an environmentally friendly concrete mix by incorporating effective microorganisms (EM4) and varying proportions of recycled concrete. The study examines the potential of SHC to heal by itself and evaluates the impact of these innovations on compressive strength. Key findings indicate the effectiveness of SHC in crack repair and the feasibility of using recycled concrete to enhance sustainability in construction. Keywords: Effective microorganism- Recycled aggregate- Self-healing concrete Share Link | Plain Format | Corresponding Author (Luthfi Muhammad Mauludin)

Page 4 (data 91 to 120 of 256) | Displayed ini 30 data/page
<< PREV 1 2 3 4 5 6 7 8 9 NEXT >>

Powered By Konfrenzi Ultimate 1.832M-Build8 © 2007-2026 All Rights Reserved