International Conference on Engineering, Construction, Renewable Energy, and Advanced Materials

Accurate Speech Recognition AI using Model of Deep Learning for Security Access

Haris Isyanto, Wahyu Ibrahim, riza samsinar, Wiwik Sudarwati — Tue, 02 Jul 2024 00:00:00 +0000

Identity theft poses a significant threat to data privacy and online transactions in cybercrime. A voice recognition approach was created to prevent this issue in security access. Every person possesses distinct and varied voice characteristics. Speech recognition is the device's capacity to identify spoken words. This speech recognition research utilizes artificial intelligence through deep learning models that are built on the Convolutional Neural Network (CNN) algorithm. CNN can accurately process vast quantities of data. The testing yielded a training accuracy of 99.8304% and a validation accuracy of 99.4001%. Testing the keywords "Welcome" and "Hello" yielded optimal results with a 100% accuracy rate. The keyword "Hello" was tested and resulted in the fastest response time of 0.64 seconds. This project aims to enhance the accuracy and speed of speech recognition, with potential applications in banking security

Keywords: Speech recognition, deep learning, security access, accuracy, response time

AGV Battery Life Prediction using Voltage Depth of Discharge Method

Ma’mun Fauzi, Eka Samsul Ma’arif — Tue, 02 Jul 2024 00:00:00 +0000

AGV (Automatic Guided Vehicle) is a mobile robot that distributes components or products from one production line to another without a crew by following certain navigation lines. The battery is the main power source for the AGV. Batteries can become damaged or short-lived due to: over-voltage, over-charging, and over-discharging. This research examines the estimation of battery life using the average percentage level of the battery's Depth of Discharge (DOD) voltage and the number of daily cycles used by the battery. The battery tested was the Valve Regulated Lead-Acid (VRLA) type with a nominal voltage capacity of 24 Volts obtained from 2 batteries with a voltage of 12V each and a capacity of 65Ah arranged in series. The research was carried out by measuring the battery voltage after each AGV operational cycle. The results of data acquisition and calculations show a percentage level of Depth of Discharge (DOD) of 10% with an average discharge voltage of 1 volt. The estimated remaining life of a Valve Regulated Lead-Acid (VRLA) battery is 693 battery cycles or the equivalent of 1 year, 10 months, and 28 days.

Keywords: AGV, battery, depth of discharge, life cycle

HYBRID SOLAR ELECTRICAL PRODUCTION SYSTEM (PLTS) CONSTRUCTION ANALYSIS at P.T. BAKRIE PIPE INDUSTRIES USING PVSyst 7.2 STANDARDS

Noval Rustama Widya, Deni Almanda, Riza Samsinar — Fri, 09 Aug 2024 00:00:00 +0000

The data collection technique used is the observation method. Observation is done by direct observation and measurement. The data obtained is then analyzed and used as input in the design of PLTS Hybrid. The kWh meter data used in this study is BPI factory hourly consumption data for the last year from January 2021 – December 2021. The data is then used as a load reference in calculating the size of the total capacity of the solar panel and battery components. The calculation of the size of the total capacity of the components is carried out by iterating the results of the PVSyst 7.2 simulation which is then combined with the financial parameters of the PLTS development in order to obtain the optimal combination of total capacity sizes. After obtaining the optimal capacity of solar panels and batteries, a technical design for the construction of PLTS Hybrid is carried out as the output of this research. The technical design includes the design of PV mini-grid technology along with the bill of material/quantity of construction. From the design, an analysis of the impact of development is carried out from several aspects such as financial, environmental and social. For the financial aspect, the calculation and analysis of savings will be carried out. Regarding the environment, a carbon emission reduction analysis will be carried out.

Implementation of Digital Image Processing for Raspberry Pi-Based Warehouse Layout Settings

Deska Anas, Fadliondi Fadliondi — Fri, 09 Aug 2024 00:00:00 +0000

Warehousing is a place for storing goods that are formed in such a way. Efficient and effective warehousing has the ability to adapt to demands to increase the speed of processes starting from receiving, storing and shipping. Good conditions and arrangements in the warehouse are expected to avoid company losses, reduce costs incurred and speed up activities and services at the warehouse. Therefore, we need an application that can support warehousing. In this case, we analyzed the warehousing system to support the warehousing process and designed a “Digital Image Processing Implementation for Raspberry Pi-Based Warehouse Layout Settings”. This design uses image processing. At this stage, the camera reads the object and the object image is processed by the microcontroller which will then be arranged according to the shape of the object. The objects are then separated using a servo motor according to a predetermined path so that the objects can be arranged according to size and not mixed up.

Design Monitoring of Dust Density Levels in Air Filters of Air Conditioning for Enhance Room Air Quality

Ahmad Zafrullah Salam, Husnibes Muchtar, Haris Isyanto, Fadliondi Fadliondi — Fri, 09 Aug 2024 00:00:00 +0000

Clean air quality is very important in maintaining human health. Increasing air pollution is increasingly worrying. The danger is the potential for injury, such as impaired lung function or even systemic poisoning. From this problem, a device was designed that was able to measure dust density in air filters of Air Conditioning (AC). This research is able to monitor dust density continuously. From the test results, the condition of air filter was obtained at the first dust density of 66 mg/m3 (clean), the second 93–203 mg/m3 (normal) and the third 251–413 mg/m3 (unclean), then the alarm buzzer was ON. The dust density test was 238.7 mg/m3 and the wind speed was 1.6 m/s with a voltage of 1.99 volts. It is hoped that this research would be useful in monitoring the dust density level in AC air filters, so that it could enhance room air quality.

Optimization Of Time And Water Flow Rate By Opening The Bleed Heating Inlet Valve In The Offline Gas Turbine Rinsing Process

Chandra Wirma, Nurul Hidayati Fithriyah, Ratri Ariatmi Nugrahani — Tue, 02 Jul 2024 00:00:00 +0000

Combined Cycle Power Plant PT. Krakatau Chandra Energy requires good performance to serve its consumers . To get good performance, a water wash is carried out to clean the dirt (Fouling) that sticks to the gas turbine compressor blade so that it is clean again, so that the pressure and temperature of the compressor outlet air (CPD) increases and improves its performance according to design. During the water washing process there are cost inefficiencies . The research objective is to reduce the duration of the gas turbine rinsing water wash by modifying the IBH (inlet bleed heating) drain path. According to its function, it draws compressor output air and directs it to the compressor and increases the temperature of the compressor inlet air by mixing cold ambient air with hot compressor exit air, thereby reducing the density and mass of air to the gas turbine. This process is carried out when the gas turbine stops by making modifications/changes to the gas turbine IBH drain line. The identification results were obtained during the long rinsing water wash process, because the IBH drain was not used in the process. By modifying the gas turbine IBH drain, the duration is expected to be 184.33 minutes. fast. The test is to analyze each decrease in conductivity based on the manual book, namely with Δ result conductivity (water conductivity demin tank - exhaust plenum output water conductivity ) at 5 μ s/c m.

Keyword: Gas turbin, IBH (Inlet Bleed Heating), Rinsing, Water wash

Production Of Activated Charcoal From Bagasse Waste To Reduce Grounding Resistance Of High Voltage Overhead Power Line

Noer Rizqi, Yustinah Yustinah, Ismiyati Ismiyati — Tue, 02 Jul 2024 00:00:00 +0000

Bagasse waste contains 0.79% ash, 27.90% pentose, 22.09% lignin, 37.65% cellulose and 2.0% essence (alcohol, benzene). The cellulose content can be made into active charcoal. The purpose of this study is to determine the effect of time and temperature of bagasse pyrolysis on reducing the grounding resistance value of high voltage overhead power line (SUTT). The bagasse samples were pyrolised at temperature variations of 600oC, 700oC, 800oC, 900oC, and 1000oC, for the duration of 30 minutes, 60 minutes, 90 minutes, 120 minutes, and 150 minutes. The activated charcoal samples were then mixed with NaCl with ratio of 0:1; 0.25:0.75; 0.5:0.5; 0.75:0.25; and 1:0 before being planted under transmission tower. The optimum characteristics of activated carbon were obtained in pyrolysis for 149.8 minutes at 992.05oC, with a characteristic value of 20.79% yield, 14.2% ash content, 1.71% moisture content, 83.71% fixed carbon, 2.09% volatile matter and 1142.1 mg/g iod absorption. These characteristics of activated charcoal meet the standards of activated carbon SNI 06-3730-1995. The results of data analysis show that the activated charcoal : NaCl ratio of 1:0 can reduce the value of SUTT grounding resistance by 76.26%

Keywords: bagasse, activated charcoal, grounding resistance value, SUTT

Pectin Extract from Banana Peel (Musa Cavendish) and Its Application as an Emulsifier for Melorin Ice Cream

Rahayu Lestari, Ismiyati Ismiyati, Yustinah Yustinah — Tue, 02 Jul 2024 00:00:00 +0000

The food industry has expanded to diversify products for improved food security, introducing alternatives like melorin, a dessert akin to ice cream but with dairy fat substituted by low-fat vegetable fat. Melorin requires at least 6% fat to follows ice cream's formulation and production processes. Emulsifiers are crucial for melorin quality, in terms of enhancing texture, viscosity, and stability. Pectin which can be extracted from banana peel waste emerges as a potential emulsifier, lecithin in its properties as it contains proteins, or non-polar groups in its carbohydrate chain. This research aims to develop melorin and utilize banana peel waste for emulsifier production. Banana peels undergo ultrasonic extraction with 5% citric acid solvent at various times (10-30 minutes) and temperatures (30-80oC). This study explores optimal extraction conditions and varying melorin formulations by pectin ratios, evaluated through consumer preference tests. The optimal extraction conditions for banana peel pectin involve a 30-minute process at 61.07°C, resulting in 45.46% pectin yield meeting IPPA's High Methoxyl Pectin standards. Increasing pectin concentration in melorin ice cream boosts water and fat content while reducing ash content due to structural alterations. Despite meeting SNI criteria, melorin's protein content falls short due to low levels in bananas and vegetable milk. Nonetheless, it's a healthier alternative to dairy ice cream, well-received for its lower fat content and improved texture with added pectin as an emulsifier, enhancing consumer satisfaction.

Keywords: Banana peel waste, Ice cream, Melorin, Pectin, Ultrasonic extraction

Encapsulation Of Eugenol In Urea-Membranes Formaldehyde As A Slow Realese Pesticides

Tue, 02 Jul 2024 00:00:00 +0000

In agriculture, managing pests by applying pesticides to protect crops is one of the most crucial aspects. However, less than 1% of these pesticides actually come in direct contact with or are consumed by target pests. controlled-release was approaches of pest management that have been developed to target the needs of these different environments. In this study, the natural pesticide (Eugenol) was encapsulated in a Urea-Formaldehyde membrane using PVA surfactant. The encapsulation method used was the emulsification method using a stirrer speed from 500-1000 rpm with a PVA concentration of 0.5 - 1 gram and a Resorchinol concentration of 0.5 - 1 gram. Base on FTIR Result, Eugenol can be encapsulated in Urea-Formaldehyde granules. The average diameter microcapsule was 0.44 μm. The maximum concentration of eugenol in water was 642.479 ppm within 8 hours

Keywords: Emulsification, Eugenol, Microencapsulation, and Urea-Formadehyde

Analysis of the Impact of Fire on Oil Storage Tanks at PT X: ALOHA Model Approach for Vapor Cloud Explosion Modeling

Tue, 02 Jul 2024 00:00:00 +0000

This research aims to re-evaluate the potential hazards threatening the safety of workers and communities in the environment of the fuel oil terminal, focusing on the pertalite product tank 53 as a case study. ALOHA modeling is employed, with variables including wind speed and atmospheric stability. The methodology involves ALOHA modeling with consideration of fuel oil type, wind speed, and direction. The farthest threat zone is identified within the yellow zone, extending up to 975 meters for toxic areas and 148 meters for flammable areas, potentially impacting the Surabaya Integrated Terminal area. The potential hazards are classified as High Risk, capable of causing multiple fatalities if the worst-case scenario materializes in storage tank no. 53 with Pertalite products. Wind speed influences dispersion distance; higher wind speeds result in decreased contaminant concentration. Similarly, atmospheric stability plays a role in dispersion distance; less stability leads to better dispersion of contaminants.

Keywords: Fuel Oil Terminal, ALOHA, Vapor Cloud Explosion Modeling

Effect of PVP Concentration on PVDF-TiO2-PVP Mixed Matrix-Membrane Properties and Performance

Tue, 02 Jul 2024 00:00:00 +0000

PVDF-TiO2-PVP flat sheet mixed matrix membranes were prepared using non-solvent phase inversion method. This research examined how the PVP concentration (1-5 %wt) as a pore-generating agent affects membrane characteristics. The membrane performance was evaluated by measuring the water flux, permeate flux, and BSA rejection. The hydrophilic membrane with the least contact angle was 65.79o, achieved with 2%wt PVP, whereas the most significant contact angle was 83.07o, obtained with 5%wt PVP. FESEM-EDX of a membrane containing 2%wt PVP reveals the presence of PVDF and TiO2. The highest PVP weight percentage resulted in the most excellent permeate flux. The highest water flux measured was 182.38 L/m2h, and the highest BSA flux measured was 160.98 L/m2h. PVP at 5% weight led to the lowest BSA rejection (50.84%). This study found that the PVP weight percentage substantially impacts membrane characteristics and performance.

Keywords: PVDF; TiO2; PVP; mixed-matrix membranes; phase inversion; NIPS; flat-sheet; BSA

Biodiesel Production Optimization From Triolein Through Esterification Process Using Dwsim Software Simulation

Kiagus Muhamad Rizal, Eko Ariyanto, Eko Ariyanto, Erna Yuliwati, Erna Yuliwati — Tue, 02 Jul 2024 00:00:00 +0000

Biodiesel is a renewable fuel that does not pollute the air, is easily biodegradable and can be renewed. Biodiesel can be used in almost all diesel engines without undergoing significant changes. This makes it one of the best options today to replace diesel. Biodiesel is generally made from vegetable oils, animal fats or algae. Esterification of vegetable oil fatty acids with short-chain alcohol is one of the methods used to make biodiesel. According to SNI 7182:2015, a purity of at least 96.5% of biodiesel must be met. Therefore, optimum biodiesel production process planning is needed. The optimization is done by considering the type of process, the composition of materials, the kind of reactors, the temperature that can affect the biodiesel produced. The aim of this research is to optimize using process simulation to produce biodiesel with a set standard of purity. Biodiesel or methyl oleate (C19H36O2) from triolein feed (C57H104O6). The simulation was done in three different PFD using DWSIM version 8.6.0. The results are expected to provide an overview of the initial engineering design of biodiesel production process

Keywords: biodiesel, esterification, production optimization, reaction kinetics, DWSIM version 8.6.0.

Characterization of Microcrystalline Cellulose from Cassava Stems Through Acid Hydrolysis Process Using H2SO4 with Variation Concentration

Tue, 02 Jul 2024 00:00:00 +0000

Cassava stems have a large enough lignocellulose content, which consists of 56.82% α cellulose, 21.72% lignin, 21.45% Acid Detergent Fiber (ADF), and 0.05 - 0.5 cm long fiber. cassava stems have the potential to be used as raw material for the manufacture of Microcrystalline Cellulose (MCC). It can be isolated by pre-hydrolysis, delignification, and bleaching stages. Then hydrolysis is carried out using H2SO4 acid. the hydrolysis stage using variations of 1.5N, 2N, 2.5N, 3N, and 3.5N. Then the yield, identification, and characterization with FT-IR were tested. The optimum concentration was obtained at 3N with a yield of 35.29%. MCC obtained from cassava stems has similarities with commercial MCC which is indicated by the appearance of the main peak in the IR spectrum at wavelengths of O-H groups, hydrogen bonds, C-H alkane, C-O ether and alcohol bonds. The identification results showed positive results marked by a change in color to violet purple.

Keywords: Cassava Stem, Microcrystalline Cellulose, Hydrolysis, H2SO4, Concentration

Identification and Removal of Microplastics in Well Water Around the Landfill Piyungan Yogyakarta with Activated Carbon

T. E. Suharto, I. Mahdi, R.N Alfiyan, A. Permadi, I. Satar — Tue, 02 Jul 2024 00:00:00 +0000

The city of Yogyakarta produces an average of 270 tons of waste every day, which causes a buildup of waste at the communal waste landfill Piyungan. This causes microplastics to be absorbed into the soil and infiltrate water in the area around the landfill. Seeing this problem, researchers provided a solution to reduce microplastics in well water using the adsorption method, using activated carbon adsorbents. This research aims to identify microplastics in the water in dug wells around the landfill and reduce the microplastic content. The research used an adsorption method using activated carbon and carried out FTIR analysis tests to analyze the composition of polymers contained in microplastics in dug wells. The variables used in the research were the amount of activated carbon adsorbent and the length of contact time. The results obtained were in the form of microplastics in several forms such as fragments, filaments, fibers and films. The results of microplastic adsorption showed that the number of microplastics before adsorption was 17470 particles/L and after adsorption with a weight variation of 6% and a time of 60 minutes. Meanwhile, in FTIR analysis, the wavelength of the sample before adsorption with activated carbon was obtained with a peak wave point of 3325.5 cm.-1, 2128,3 cm-1, and 1636.3 cm-1 and wavelength after adsorption with activated carbon with a peak point of 3340.6 cm-1, 2107,8 cm-1, and 1637,2 cm-1 so it is estimated that the sample contains Polystyrene (PS), Polyethylene (PE), and Polyvinyl Chloride (PVC).

Keywords: adsorption, activated carbon, microplastics, well water, waste landfill

Risk Management of the water resources analysis: Application of Membrane technology in peat water treatment

Abid Dzajuli, Sri Rahayu, Erna Yuliwati, Ahmad Giffary — Tue, 02 Jul 2024 00:00:00 +0000

The water supply system development needs to be safe and meet health requirements. Due to the expansion of the ore processing industry, water supply providers are required to identify the risks that may arise from dangerous events. The purpose of this study was to build a structured approach to drinking water risk management. We used risk assessments concerning the environmental management system, risk management, and the food safety management system. The Musi River in Palembang City is one of the most important rivers in Indonesia. This river is the source of raw water for the Tirta Musi Regional Company of Palembang City but unfortunately, the quality of this river water tends to decline due to pollution. Many things have been done by the government to manage the river water, but it has not brought positive changes to the raw water source. Problems that occur include urban development and land use changes that influence river pollution loads. The approach taken in this research is qualitative analysis and risk management by using critical review methods and regulatory studies. The results show that is in the form of policy development in river management as a source of raw water, namely land use management, separation of drainage channels with domestic sewage channels, increasing IPAL service coverage, and strengthening institutional and regulatory aspects, especially in funding commitments. Moreover, this study suggests the possibility of searching for other water resources from the peat water that collects from the peat region. As known that the South Sumatra area has many peat regions, and this might be chosen as an alternative water source. UV-ultrafiltration membrane is a promising system to produce water from peat areas.

Keywords: River Water Pollution; Land Use; Drainage; Legal & Institutional Aspects; UV-ultrafiltration membrane.

Numerical Simulation of Effect the Geometrical Underlip on The Performance of Oscillating Water Column

Azhar Bima Alfarozi, Muhammad Agung Bramantya — Tue, 02 Jul 2024 00:00:00 +0000

The development of water wave energy conversion especially Oscillating Water Column (OWC) continues to find the most optimal system. Using the CFD method, the research process becomes faster and more effective because one of the advantages of CFDs is the rapid prediction of phenomena with a numerical simulation approach. This research aims to increase efficiency of water wave energy conversion, especially OWC using CFD. Modifications were made to the OWC underlip with the model used in the experiment by Celik (2022). The models are rectangular model (as reference), rounded model, quarter circle model, front semi-circle model, back semi-circle model, and circle model. From the CFD simulation results, an increase in efficiency is obtained for each modification model. The optimal model is the circle model with an efficiency increase of 8.87% from the conventional underlip (rectangular) model. This is because the turbulent kinetic energy in the system can be reduced.

Keywords: Oscilating Water Column, Underlip Geometry, Turbulence Kinetic Energy, Computational Fluid Dynamic

ANALISYS PNEUMATIC CUTTING SYSTEM ON AUTOMATIC PRINTING & CUTTING LONG RICE CRACKERS MACHINE CAPACITY 7 KG / H

Gustav Permadi, Windarta Windarta, Fadwah Maghfurah, Ratna Dewi Nur'aini — Tue, 02 Jul 2024 00:00:00 +0000

The cutting of lontongan (rice crackers) was done manually. It has disadvantages nonuniform in thickness and low productivity. The aim of this research is to plan a cracker molding and cutting machine with a capacity of 7 kg/hour and to analyze the pneumatic system used in cutting cracker cake dough. The design of cracker molds and cutting tools was carried out using computer-based design software. Calculations were carried out to obtain image dimensions, determine the materials and determine the existing components used in making molding machines and cracker cake cutters. The testing mechanism was to determine the test that will be carried out. Testing was carried out by means of experimental testing, then data collection was carried out. Data analysis was carried out by observing the data results that have been obtained from experimental testing which were then analyzed and conclusions were drawn. The results shows that using cracker molding and cutting equipment on a home scale can increase production yields by 7 kg / hour or about 48-53 pieces ricecake crackers per hour, compared to the home scale that makes manual long ricecake crackers can only be 3kg / hour or as many as 21-24 pieces ricecake crackers. Secondly, the air pressure required to mold cracker cakes is 7 bar with a diameter of 2 cm. and the third, The advantage of this cracker molding and cutting tool is that it can increase productivity, the disadvantage is that it requires a lot of electricity and costs a lot.

Keywords: cracker molding and cutting machine, Cutting system, pneumatic system, rice crackers

Effect of High-Temperature Heating Cycle on Mechanical Strength Degradation of 95 wt% Metallic Zirconium in Alkaline Fusion Environment

Shokhul Lutfi, Muhammad Waziz Wildan, Muhammad Robby Firmansyah — Tue, 02 Jul 2024 00:00:00 +0000

Zirconium and its alloys are metals that resist high temperatures, have good mechanical characteristics, and resist corrosion attacks. PT Timah uses metallic zirconium for tin ore smelting reactors involving alkaline fusion at a heating temperature of 800 °C in 10 minutes. Under these conditions, zirconium fails after 1000 minutes of accumulative heating. In this study, a simulation of tin ore smelting was conducted with 100 minutes each cycle. Tensile strength and Vickers hardness tests were conducted at cycles 0, 3, 6, 9, and 12 to observe the degradation that occurred. The results showed that the samples decreased their UTS and lost their elasticity as the heating cycle increased. At cycle 9, the samples experienced the largest decrease in UTS of 80% from 406.76 MPa to 81.20 MPa. The Vickers hardness of the sample surface increased from 180 VHN to 1031.42 VHN while the strain decreased from 11.90% to 3.70%.

Keywords: Zirconium, High-Temperature, Crucible, Alkaline Fusion

Numerical Studies of Liquid Properties Effect on The Inception of Flooding in a Model of 1/30 Hot Leg PWR

Rafid Zulfiadib, Deendarlianto Deendarlianto — Tue, 02 Jul 2024 00:00:00 +0000

An operation of nuclear power plant such as Pressurized Water Reactor (PWR) requires a high standard of safety management. In order to prevent the accidental scenario such as Loss of Coolant Accident (LOCA), the characteristic of flooding regime during CCFL should be investigated. This present study covers a numerical simulation on the effect of liquid properties during the inception of flooding or CCFL in a model of 1/30 hot leg PWR. Transient numerical simulations are performed using ANSYS Fluent 2020 R2 software with the Volume of Fluid (VOF) method to model a counter-current two-phase flow in the hot leg pipe. The geometry used is the German Konvoi type with a scale of 1/30. The diameter and the length of the hot leg are D = 25.4 mm and L = 455 mm respectively, resulting in a ratio of L/D = 17.91. The gas fluid used is air while the liquid fluid used is distilled water with the addition of %wt glycerin 40% and 60%. The results showed that the increase in liquid viscosity caused flooding initiation to occur at lower gas superficial velocities. While a decrease in surface tension causing the flooding to occur at lower gas flow rates

Keywords: Counter Current Flow Limitation, Onset of Flooding, Pressurized Water Reactor, VOF, CICSAM

Experimental Study on Single-Phase Immersion Cooling for Thermal Management of Lithium-Ion Battery

Tue, 02 Jul 2024 00:00:00 +0000

Battery thermal management is a critical component for maintaining safe and efficient operation, particularly in the context of electric vehicle applications. The immersion cooling technique, which employs S3 X immersion coolant, has been recognized as an effective method to address overheating during battery operation. This study examines the effectiveness of S3 X coolant in managing temperature in LiFePO4 18650-type lithium-ion cylindrical battery packs. Experimental results showed that at a discharge rate of 2.5C, the maximum temperature recorded was 43.2°C with natural cooling and 36°C with immersion cooling. The immersion technique successfully reduced the average surface temperature of the battery by 15.03% and minimized the maximum temperature difference from 4.4°C to 1.9°C at a discharge level of 2.5C. Based on these results, immersion cooling proved to be an efficient solution for the battery thermal management system, supporting more stable and reliable operation

Keywords: Immersion cooling, dielectric fluids, thermal management, lithium-ion battery,S3 X

Numerical Prediction of Shell and Tube Heat Exchangers Performance with Fold Segmental Baffle

Widyastutifajri Nuha, Joko Waluyo, Indro Pranoto — Tue, 02 Jul 2024 00:00:00 +0000

Shell and Tube Heat Exchanger (STHE) has been used widely used in industry for energy transferring between two and more fluids. Effectiveness of STHE is enhanced by utilizing baffle on the fluid passage in the shell. In this research, a novel baffle which has specific geometrical shape is investigated. The baffle is built based on segmental baffle which is fold on the edge with variation fold angel 120˚, 135˚, and 150˚. This research is carried out using numerical simulation with ANSYS, and validated using experimental data. This research compares conventional and fold segmental baffles performance on the shell and tube heat exchanger. Research revealed that the 150˚-fold angle has superior performance as indicated by the highest effectiveness (ε) among the fold segmental baffle. For comparison, at a mass flow rate of the fluid in shell of 0.4 kg/s, the effectiveness is obtained at 31.521%; 31.077%, 31.764%, and 31. 928% for conventional segmental baffle, fold angle 120˚, 135˚, and 150˚, respectively. In addition, the pressure drops of the fold segmental have no significant difference with that on the conventional segmental baffle. Comparing between the conventional and fold segmental baffle, it is noted that fold segmental baffle offers better performance, especially fold angle of 135o and 150o. This finding offer prospectus advantage of using fold segmental baffle in shell and tube heat exchanger

Keywords : CFD, effectiveness, heat transfer coefficient, segmental baffle, shell and tube heat exchanger.

Influence of Diamond Purity to Amorphous Growth In-Liquid Plasma Chemical Vapor Deposition (CVD) Method

Tue, 02 Jul 2024 00:00:00 +0000

Diamond is one of the most remarkable natural materials, with several possible excellent physical properties in a wide range of applications. Natural diamonds form under high temperatures and high pressure, at least 250-300 km underneath the earth's mantle. However, diamonds are so rare in nature, so that command a high price. Because of that many researchers tried to grow synthetic diamonds in laboratories to utilize tremendous properties. This research investigates influence of purity of surface single crystal diamond to diamond and amorphous growth using the in-liquid plasma CVD technique. The experiment utilizes a X5CrNi18-10(JIS:SUS 304) substrate pre-embedded with single-crystal diamond seeds. Following deposition, substrate characterization using Scanning Electron Microscopy to observe morphology and Raman spectroscopy to confirm quality of film growth. The impurity at diamond seed can disturbed lattice arrangement such as interstitial, vacancy or substitutional atoms. This reason show that impurities can proposed amorphous growth in deposit film.

Keywords: Amorphous, CVD, Diamond and Growth

Study of Potential PCL for Bone Screw with Enhancement Mechanical Strength through Annealing Process

Min-Wen Wang, Muhammad Rizki Azizi — Tue, 02 Jul 2024 00:00:00 +0000

This study was carried out to assess the potential mechanical properties of PCL (Polycaprolactone) applied as bone screws. PCL is a biocompatible and biodegradable, this material could be absorbed by the human body when used as a bone screw. However, PCL does not have high enough mechanical strength and stiffness, a micro injection molding process will be used to make PCL bone screws. To improve the mechanical strength and stiffness of the molded PCL screw, annealing was applied after the screws were molded. The experimental results showed that the strength at yield of the molded specimen was 15.855 MPa and the young modulus was 1.98 GPa while those of the after annealing specimen were 17.366 MPa and 3.47 GPa, respectively. Indicates that micromolding of a PCL can be improved by proper annealing process.

Keywords: Bone Screw, PCL (polycaprolactone), Micromolding Machine, Annealing, Tensile Test.

Development of laboratory-scale crossflow turbine power plant

Tue, 02 Jul 2024 00:00:00 +0000

Hydropower is a primary renewable energy source that is widely used. The crossflow turbine is one of hydroelectric power technology which is commonly used for low head applications. This turbine utilizes the impact energy from water that falls from a height such as a natural waterfall. This study aims to design and construct a laboratory-scale power plant with a cross-flow power plant for further research. Experiments were performed to identify the developed cross-flow turbine performance. The flow-rate, shaft rotational speed, current, and voltage were measured for five different opening valves, which is 20%, 40%, 60%, 80%, and 100% of valve. It is found that 80% and 100% of valve opening where the flowrate 0.27 and 0.33 l/min was generating electricity up to 67.2 Watt. It can be concluded
that the developed power plant is adequate to use for further research

Keywords: Pico Hydro Power Plant, Design Analysis, Crossflow Turbine

Combination of Kaizen, Design Thinking Method, and Quality Function Deployment to Design Service Quality Improvement in TransJakarta

Rahmat Saputra, Anni Rohimah, Soerahman Soerahman — Tue, 02 Jul 2024 00:00:00 +0000

To support the development of TransJakarta, it is necessary to make improvements and innovations in serving users so that they are more comfortable in using TransJakarta as a transport option. The results of the data in this study are organised into stages from a combination of Kaizen Culture, Design Thinking and Quality Function Deployment. Service improvements to TransJakarta are: TransJakarta bus stops are safe and comfortable if the concept of modern bus stops, ergonomic seating, and the location of bus stops is underground or on flyovers with the concept of independent routes without being mixed with public lanes. There is no accumulation of passengers in the bus because of the rules limiting bus capacity, adding fleets, and more flexible lines or adding new routes. Easy to charge BUMN or non BUMN payment cards. No sexual harassment due to bus capacity limitation rules. Easy to buy food and drinks. All bus stops are integrated with other public transport. Not too much transit. Buses do not experience congestion due to the addition of bus fleets and the location of bus stops underground or on flyovers with the concept of independent routes without mixing with public lines.

Keywords: Design, Kaizen, Improvement, Quality, Service

Productivity Improvement using Time and Motion Study at Mixing Work Station PT. XYZ

Tue, 02 Jul 2024 00:00:00 +0000

The domestic plastic manufacturing industry is currently experiencing continuous development. Therefore, competition in the plastics manufacturing industry demands that they are always ready to improve their performance and productivity. PT. XYZ is a plastic manufacturing company that faces problems regarding a lack of productivity levels. There are three work stations at PT.XYZ (Mixing, Injection, and Assembling). The mixing department is the department that has the lowest average productivity percentage, namely 83.3%. Efforts to increase productivity are carried out using an ergonomic approach, namely the time and motion study method and combined with quality tools in the form of check sheets, Pareto, fishbone and 5W+1H analysis. Monika Kussetya Ciptani (2001), the use of the time & motion study method which is integrated with the Activity-Based Costing (ABC) method in terms of cost assignment, will affect the Company's productivity and cost efficiency. From the results of the 5W+1H analysis it is known that the decrease in productivity occurs because there is no standard time measurement for the mixing process. Then there are recommendations for improvement by measuring the standard working time of the mixer operator . In the process of time and motion study analysis it is known that the three elements of the mixing workstation are cleaning the mixer tube, mixing, and packaging. From the calculation results it is known that the normal time is 0.5072 minutes, the allowance is 7.98% and the standard time is 0.5511 minutes. After corrective action was taken, there was an increase in productivity of 16%.

Keywords: productivity, ergonomic, time and motion study

Identifying and Preventing Work Accidents in Production and Installation Video Wall and Signage Monitor Using JSA

Yulita Veranda Usman, Ririn Regiana Dwi Satya, Muhamad Rizky Devianto — Tue, 02 Jul 2024 00:00:00 +0000

Work accidents are a serious problem for many companies. CV. JVS, a manufacturer of video walls and signage monitors, prioritizes worker safety. Their work processes involve lifting/rigging materials, cutting, assembly, and finishing. Observations indicate a fairly high risk of accidents, with an average of 5-10% occurring monthly. Accident types include physical hazards (being hit by heavy tools and materials, pinched materials, scratched hands) and welding-related hazards (sparks, light reflections). Therefore, this research aims to identify and analyze factors that cause work accidents and develop a preventive action plan. The methods used in this research are fault tree analysis and job safety analysis (JSA). Data collection involved direct observation, interviews with workers and management, and document review of previous workplace accident reports. The results showed that several critical tasks in CV. JVS's production and installation processes have a high potential for work accidents. Potential hazards include contact with moving machinery and handling heavy loads. Causes include a lack of worker training and safety awareness, lax supervision, and inadequate equipment maintenance. The JSA documents, as the research outcome, can serve as a reference for the CV. JVS and similar companies to improve work safety performance. CV JVS may reduce workplace accidents by under 5% per month.

Keywords: Accident prevention, fault tree analysis, job safety analysis, risk assessment, workplace safety

The Implementation of the RULA (Rapid Upper Limb Assessments) Method on Stamping Workers to Determine the Risk of Musculoskeletal Disorders Complaint

Muhammad Itsbat Robbani, Nelfiyanti Nelfiyanti — Tue, 02 Jul 2024 00:00:00 +0000

In today's era, there are numerous businesses thriving, one of which is packaged honey production. One of the beekeeping industries that produces honey and other bee products is CV Madu Apiari Mutiara. The stamping activity in this business has workstations that are highly uncomfortable. The workstation, in the form of a table set at the height of human knees, causes discomfort for the workers
and leads to MSD complaints. Therefore, a risk assessment calculation was conducted using the TULA method, resulting in a total score of 7, categorized as "Very High," requiring further investigation and immediate improvement. If this musculoskeletal disorder risk condition is not promptly addressed, it will impact the workers' health and cause workers to suffer injuries It can even cause disability in several parts of the body due to the pain experienced. Thus, the corrective action that can be taken
involves designing work aids such as a workstation table that considers the anthropometric factors of the workers

Keywords: Ergonimic, RULA, MSD, Honey

Analysis of Quality Control of Honey Sachet Product Using Statistical Quality Control (SQC) Method on CV Madu Apiari Mutiara

Abda Hanif Akbari, Muh. Kosasih, Didi Sunardi — Tue, 02 Jul 2024 00:00:00 +0000

CV Madu Apiari Mutiara is a company that produces various types of honey products. One of the products is sachet honey products. In the process, there are still many defects that occur. There are 5 types of defects that occur in the product, including: empty, short packaging, long packaging, underfilled, and overfilled. From the observations, it was found that of the 1750 products, there were 162 products that were defective (9.26%). The calculation results also show that the defects that occur are still outside the control limits. The aim of this study is to analyze quality control in sachet honey products using the statistical quality control (SQC) method. Quality control analysis is carried out using several quality control tools, including check sheets, control charts, Pareto diagrams, fishbone diagrams, and 5W1H analysis. The research results show that there are three factors that influence the production process: human, machine, and environmental factors.

Keywords: SQC, Honey, Quality

Tropical Savanna Climate Zone Of East Nusa Tenggara, Indonesia

Tue, 02 Jul 2024 00:00:00 +0000

The most frequently used climate classification map is that of Wladimir Köppen, Köppen is a plant
scientist and realised that plants are indicators for many climatic elements. Each zone has its own
characteristics in terms of architectural form. Climate zones themselves are found in various
countries, including the climate zone in Indonesia, a country that is well known as a tropical one, a
country that only has two seasons : the dry and the rainy seasons, so the Climate Zone system
exists also in Indonesia. The traditional houses in the tropical savanna zone that will be discussed
are traditional houses located in Eastern Indonesia. The discussion is related to cosmology,
building form, and the influence of climate on traditional houses. The method used in this paper is
qualitative by obtaining literature study data from various journals. The purpose of the discussion
in this paper is to add some information to the scientific literature bertaining to traditional houses
in the tropical savanna climate zone of east nusa tenggara according to the Koppen Classification
System.

Keywords: Architecture, Climate, Traditional Houses

Study of Indoor Health and Comfort of Classroom at Public Elementary School: Ragunan 08 Pagi

Rifa Nur Habibah, Yeptadian Sari — Tue, 02 Jul 2024 00:00:00 +0000

Educational buildings are often used as places for various activities. Classrooms are often used every week for 5 days. This situation allows the transmission of disease from one individual to another, especially if classroom conditions are inadequate for health and comfort. It is important to have classrooms that are adequate in terms of health and comfort. The school that will be the object of research is SDN Ragunan 08 Pagi. The aim of this research is to understand and identify indoor health and comfort (IHC) in classrooms. This research use descriptive qualitative approach. The research results show that SDN Ragunan 08 Pagi has fulfilled 4 points out of 8 points of the overall criteria. The criteria that meet the standards are Introduction of outdoor air, control of cigarette smoke in the environment, chemical pollutants, and visual comfort

Keywords: comfort, classroom, space, education, health

The Sacredness of the Cultural Landscape of the Kanoman Palace, Cirebon

Dini Rosmalia, I Nyoman Teguh Prasidha, Ayu Herzanita, Ramadhani Isna Putri — Tue, 02 Jul 2024 00:00:00 +0000

Kanoman Palace is a cultural landscape that has survived from the 17th until the 21st century AD today. This cultural landscape of the palace has elements whose sacredness is valued by palace disciples. This paper aims to describe the physical and non-physical elements of the cultural landscape of the Kanoman palace which contains sacred values, and to reveal the philosophy contained in it. The method used in this research was a qualitative approach. The results of the research show that the physical elements of the Kanoman Palace's cultural landscape are buildings, spaces, vegetation within the palace complex, and some locations outside of the palace. The non-physical elements are traditional rituals of the palace which are held periodically. The sacredness of this cultural landscape arises if traditional rituals which are non-physical elements are held in locations or places that are sacred to the residents of the palace

Keywords: Cultural Landscape, Kanoman Palace, Sacredness

The Effect of the Use of Quizizz Learning Media Based on Information and Communication Technology (ICT) on Student Learning Outcomes

Suci Aulia, Mustari Lamada, Fathahillah Fathahillah — Tue, 02 Jul 2024 00:00:00 +0000

This research uses a quantitative approach to the type of experimental research with the design of a non-equivalent pretest-posttest control group. The total sample in this study is 60 students consisting of 30 students from class IX A and 30 students from class IX D. The research data is obtained from tests and documentation, and the analytical techniques used are descriptive statistical analysis and hypothesis testing. Based on the results of the research carried out, it was obtained: (a) Student learning outcomes in the experimental class before applying the Quizizz learning medium averaged 75.83, (b) Student learning outputs in the Experimental class after polishing the average learning medium Quizizz averaged 93.5, and (c) Hypothesis test results with the Man-Whitney test used as an alternative to the independent T-test, while to evaluate improvement in the score in the same group, the Wilcoxon test was used as a alternative option for two pairing sample t-tests. Man and Whitney test results showed a significance value of 0,000 which is less than the level of 5% (0,000 < 0.05), which means that there is an influence of the use of Quizizz information technology-based learning media and communication on the learning outcome of students at MTs Madani Alauddin.

Keywords: learning media, quizizz, learning outcomes, ICT

Transformation of conventional libraries into digital

Rafi Fadhlurokhman, Rita Dewi Risanty, Jumail Jumail, Rully Mujiastuti — Tue, 02 Jul 2024 00:00:00 +0000

This research uses the library of the Faculty of Engineering, Muhammadiyah University, Jakarta as a case study. Conventional mode interactions make students face limitations in accessing references due to limited visiting time, manual searches, and limited published information for available, unavailable, or borrowed items. This research aims to make it easier for students to access the library of the Faculty of Engineering, Muhammadiyah University of Jakarta and find reference books or journals that they need in the library more easily, flexibly without time, space and distance limitations. SDLC methodology with a waterfall model was chosen for e-library development to change conventional interactions into digital. Preliminary tests have been carried out through questionnaires to evaluate interactions in the library compared to conventional interactions. A total of fifty students were involved in learning, and were asked whether reference books and journals in the library helped them in doing the assignments given. The result
5.4% of students responded can help and 94.6% said no.

Keywords: Waterfall ,SDLC,conventional E-Library

WEB-BASED ARCHIVES MANAGEMENT INFORMATION SYSTEM USING RAPID APLICATION DEVELOPMENT METHOD AT IMM FT UMJ

Virgi Al-Fiansah, Sitti Nurbaya Ambo — Tue, 02 Jul 2024 00:00:00 +0000

The archive management implemented by Ikatan Mahasiswa Muhammadiyah Fakultas Teknik Universitas Muhammadiyah Jakarta (IMM FT UMJ) is still semi-computerized, where computers are only used for the administrative process of creating documents such as letters, proposals and preparing reports, while all these documents will become archives that will be needed for carrying out other activities. The existing archives contain all information regarding activities carried out by IMM FT UMJ, which functions as valid evidence of actions and decisions or as a basis for carrying out activities. Archives stored on computer storage media have weaknesses from an operational perspective when the archives are needed again by IMM FT UMJ members, because only the general secretary can access these archives and they can be accessed offline via general secretary computers.
The aim of this research is to produce alternative solutions by creating a web-based archive management information system that can be accessed by IMM FT UMJ members online and makes it easier to search for archives. Data collection methods in this research consist of literature study, observation, and interviews. Application development uses the Rapid Application Development (RAD) method which focuses on speed in system development to meet user needs without reducing system quality, where in making this application there is an iterative process that involves feedback from users. Based on the results of application testing carried out using the black box testing method, it can be concluded that this information system can make it easier to manage archives for the general secretary as well as for the need to access archives for members

Keywords: archives, documents, iterative process, information systems

Analysis Abnormal of Engine Noise in UD Truck Quester CWE 370 Unit

Tue, 02 Jul 2024 00:00:00 +0000

Engine is the main driving force of a vehicle used in all types of vehicles. Its function is to drive the components present in the vehicle so that the vehicle can move and perform its functions. In the UD Truck Quester CWE 370 unit, the engine functions as the main driver for both the vehicle drive system and the vehicle hydraulic system. With a high hours meter, various issues may arise, such as abnormal engine noise characterized by a rougher-than-usual engine sound. In the case of abnormal engine noise in the Quester CWE 370 unit, after troubleshooting and testing, it can be concluded that this occurs due to a cam lobe shifting from its camshaft. Because this shifted cam lobe can affect other cam lobes, replacing the camshaft unit is highly recommended. Of course, after replacing the parts, perform several tests to ensure that the abnormal engine noise has returned to normal.

Keywords: Troubleshooting, Engine, Camshaft

EFFECT OF NANO CHITOSAN ON THE CHARACTERISTICS OF WET WIPE FROM COCOA HELL WASTE

Sat, 21 Sep 2024 00:00:00 +0000

Cocoa husk is one of the agricultural wastes that can be utilized as raw material for pulp making, because cocoa contains cellulose so that it can be used as raw material for tissue making. Natrium hydroxide is used to isolate the cellulose in cocoa. Nano chitosan was prepared by varied chitosan mass then reacting with sodium tripolyphosphate with ionic gelation for the formation of nanostructures and freezing methods to reduce water and the formation of gel structures. The purpose of this study was to find the effect of nano chitosan concentration on tissue characteristics from cocoa skin waste, to find the effect of nano chitosan concentration on the effectiveness of anti-bacterial pathogen and to find the optimum chitosan mass. The results obtained on the effect of chitosan mass on the characteristics of wipes from cocoa skin waste are that it can absorb about 20% of the 300 cm2 area and for the appearance of the wipes it is not easy to fade for the color of the wipes themselves and is less clean, not soft and not hollow, testing of pathogen bacteria according to SNI 8526: 2018 obtained the effect of chitosan weight on pathogen bacteria obtained the result that nano chitosan is effective in killing Pseudomonas aeruginosa bacteria in various variations of chitosan weight and optimum chitosan weight at a weights of 4 grams.

THE EFFECT OF TIME EXTRACTION DURING LLE (LIQUID LIQUID EXTRACTION) ON THE CONTENT OF COUMARIN COMPOUNDS IN CINNAMON WATER EXTRACT POWDER PREPARATIONS

Nur Hadi Ahmad Mirfaqo, Fatma Sari, Ika Kurniaty, Ummul Habibah Hasyim — Sat, 21 Sep 2024 00:00:00 +0000

Cinnamon is a plant that is widely processed and utilized. However, the presence of coumarin in cinnamon causes negative trade issues. This study aimed to determine the adequate solvent volume to remove the coumarin compound content in cinnamon water extract powder. The extraction method used was digestion and Liquid-Liquid Extraction (LLE) with variations in extraction time of 5, 10, 15, 20, and 25 minutes, while the method for identifying coumarin compounds was Thin Layer Chromatography (TLC). The results showed that the yield of extract powder for each variation carried out was ± 3.0%, the drying shrinkage test obtained a result of ± 0.9%, and the TLC test obtained a negative band result at the best time of 20 minutes. The resulting extract powder was slightly reddish brown, had a distinctive cinnamon odor, and a slightly astringent taste. The greater the solvent used, the smaller the amount of coumarin compounds in the extract.