Jurnal Inovasi Teknologi Terapan

Pengaruh Kandungan Partikel Cangkang Telur Terhadap Kekerasan dan Kekuatan Lentur Komposit Epoksi Setelah Paparan Panas

Anugrah Surya Arya Pranata — 2026-02-27

Heat exposure can influence the changes in hardness and flexural strength of composites made from eggshell particles and bamboo fibers. The composite samples were prepared through cold compaction at 5 MPa for 2 hours. The materials were combined based on the following volume fractions: 50% epoxy resin, 10% alumina, 10% graphite, 5% zinc oxide (ZnO), and a 25% mixture of eggshell particles and bamboo fibers. The composite samples were then heated to 200°C for 1 hour. The final step involved curing, which required heating the samples in an electric oven at 150°C for 1 hour. Using a weighting method, the composite containing 25% eggshell particles achieved the optimal result, with a multi response performance index (MRPI) of 42.43. This composite exhibited hardness, modulus of elasticity (MOE), modulus of rupture (MOR), and strain values of 70.24 Shore D, 37.65 MPa, 8.58 MPa, and 0.78%, respectively. Conversely, the sample with 25% bamboo fiber and no eggshell particles demonstrated the highest flexural strength at 12.06 MPa, while the sample containing 25% eggshell particles recorded the highest hardness of 70.24 Shore D.

Desain Pengering Elektrik Untuk Pengolahan Dendeng Ikan Cakalang (Katsuwonus Pelamis)

M. Muzni Harbelubun — 2026-02-27

Traditional drying of skipjack jerky is still widely used by MSMEs, but it is highly weather-dependent, prone to contamination, and produces less uniform quality. This research aims to design and test a prototype of an incandescent electric dryer that is simple to operate, provides controlled drying conditions, and is easy to use. The system developed is an insulated cabinet with stainless-steel mesh racks, incandescent light heaters, forced-air circulation, and temperature and humidity sensors, monitored during a 360-minute performance test with sample mass changes. The results showed that the drying chamber temperature remained stable at 43.9–49.3 °C, the relative humidity dropped from about 47% to ±30%, and the jerky mass decreased from ±917 g to ±353 g, with a final moisture content of about 30%. Compared to sun drying, electric dryers provide faster drying rates and more stable drying patterns, making the time to achieve the target moisture content and quality between batches more predictable. These findings show that the prototype is worthy of consideration as an alternative drying technology for seafood processing MSMEs and serves as a basis for further development to improve energy efficiency and product uniformity.

Pengaruh Bentuk Geometri terhadap Laju Korosi Baja Karbon dalam Larutan NaCl 3,5%

Rudi Hartono — 2026-02-27

The geometry of metal components is an important factor influencing corrosion behavior, particularly localized corrosion. This study aims to analyze the effect of geometric variations on the corrosion rate of carbon steel through a simulated laboratory experimental approach. Carbon steel specimens were fabricated with three different geometries, namely flat surface, sharp-edged surface, and crevice geometry. Corrosion testing was conducted using immersion and potentiodynamic polarization methods in a 3.5% NaCl solution. The analyzed parameters included mass loss corrosion rate, corrosion potential, and corrosion current density. The results showed that crevice specimens exhibited the highest corrosion rate, followed by sharp-edged specimens, while flat surfaces demonstrated the best corrosion resistance. This behavior is attributed to the formation of differential aeration cells and non-uniform current density distribution caused by geometric variations. These findings highlight the importance of considering geometric design in corrosion mitigation strategies for metal components.

Aplikasi Smarthome Berbasis IoT Menggunakan Android Studio

Ibnu Kurniawan — 2026-02-27

The Internet of Things (IoT) allows the integration of hardware with internet networks for remote control and regulation. IoT is a technology that allows various devices to connect and communicate with each other over the internet, thus enabling efficient automation. This research develops a Smarthome application called EDITH that operates based on IoT. The app allows control of the lighting device through a smartphone with additional features such as scheduling, energy monitoring, and usage history. The system uses the NodeMCU ESP32 as a microcontroller that is integrated with the Adafruit.io server. The test results show that EDITH can function effectively in controlling the lights remotely, with a user satisfaction rate of 84%.

Pengaplikasian Baterai Lithium Ion pada DYE Sensitized Solar Cell (DSSC) dengan Sistem Building Integrated Photovoltaic (BIPV) Rumah Tinggal

Daya Wulandari — 2026-02-27

Solar energy can be converted into electricity using photovoltaic systems as a strategic measure to achieve the renewable energy mix targets outlined in the National Energy Policy. Photovoltaic Rooftop (PV Rooftop) systems integrated with Building Integrated Photovoltaics (BIPV) present a viable alternative. PV Rooftop technology is currently trending, as evidenced by its increasing adoption in both industrial and residential sectors, supported by the global decline in solar panel prices. However, from an architectural perspective, silicon-based PV panels can reduce the aesthetic appeal of buildings. An emerging solution promoted by architects worldwide is the implementation of semi-transparent, dye-sensitized solar cells (DSSC), which are sensitive to colorants. In addition to their functional properties, DSSCs offer high aesthetic value due to the pigments used. Urban areas hold significant potential for the development of off-grid DSSC photovoltaic systems installed on rooftops and building facades. This study focuses on the analysis of off-grid DSSC PV systems for a type 42 residential house in Palembang City. The research employs a quantitative approach, using literature review and field measurements, followed by technical calculations. The article details the components required for designing an off-grid DSSC photovoltaic system capable of supplying all household electrical loads.

Analisis Kekuatan Lentur Komposit Berbasis Serat Daun Alam sebagai Alternatif Material Bilah Turbin

Novia Arista Dwi Ramadina — 2026-02-27

Wind energy is one of the most promising renewable energy sources to support the transition toward sustainable energy systems, making the selection of strong and environmentally friendly wind turbine blade materials essential. This study aims to assess the potential of natural fibers as composite reinforcement, with a particular focus on flexural performance. Three types of natural fibers were compared: ijuk fiber (Arenga pinnata), pineapple leaf fiber, and corn husk fiber. Composite specimens were produced using polyester resin as the matrix with a 5% fiber volume fraction (95:5 ratio), and all fibers were pretreated through two hours of alkaline immersion. Test samples were fabricated following ASTM D790 standards with dimensions of 150 × 12.5 × 3 mm and evaluated using a Zwick Roell Z020 universal testing machine at the Materials Laboratory of Politeknik Manufaktur Negeri Bangka Belitung. The results revealed that ijuk fiber–reinforced composites achieved the highest average flexural strength of 57.3 MPa, followed by PALF at 47.5 MPa, while corn husk fiber produced the lowest value at 29.33 MPa. One-way ANOVA confirmed significant differences among the three fiber groups (p < 0.05). Overall, ijuk fiber demonstrated the greatest potential as a sustainable and high-performing reinforcement material for composite applications.

Pengaruh Jumlah Mata Parut Terhadap Kapasitas Produksi Mesin Pemarut Batang Sagu

Dito Marian — 2026-02-27

Sago is a local food resource with high potential to be developed as an alternative carbohydrate source in Indonesia. One of the critical stages in sago processing is the grating process, which significantly affects production capacity and efficiency. This study aims to analyze the effect of the number of grating teeth on the performance of a sago stem grating machine. Two grating tooth variations, namely 18 × 20 and 20 × 22, were tested using a 7.5 HP gasoline engine. Each variation was tested three times using sago stems weighing 6,000 grams. The observed parameters included grating time, mass of perfectly grated material, imperfect grated material, wasted material, production capacity, and production efficiency. The results showed that the 20 × 22 grating teeth variation produced better performance, with a production capacity of 128.85 kg/h and an efficiency of 94.70%, compared to the 18 × 20 variation with a capacity of 99.65 kg/h and an efficiency of 89.3%. The study concludes that increasing the number of grating teeth significantly improves the performance of the sago stem grating machine.

Kelayakan Komposit Pet Daur Ulang Berpenguat Talc Resin Sebagai Bahan Filamen 3D

Verdy Banarma — 2026-02-27

This study aims to utilize used PET plastic waste as a basic material for 3D filaments with the addition of talc resin as a reinforcing material. Literature review shows that talc resin can increase stiffness and mechanical strength in polymer composites. The experimental process was carried out through mixing, molding, and tensile and impact tests according to ASTM standards. The test results showed that the addition of 10% talc resin provided optimal tensile strength and toughness compared to other varia tions. Thus, filaments based on used plastic and talc resin are suitable for use in environmentally friendly 3D printing applications.

Investigasi Kekakuan Pada Pelat Baja Lunak Dengan Pembentukan Metode Dimple Dies Triangle Profile

Risky Arisandi — 2026-02-27

This study aims to analyze the effect of variations in the number and diameter of dimple holes on the stiffness of mild steel plates using the Dimple Dies Triangle Profile forming method. Plate stiffness is important for reducing vibrations, especially in vehicle components. The material used was a 0.6 mm thick galvanneal plate, with dimple diameters of 25 mm and 30 mm, and hole quantities of 16 and 20. Testing was conducted using a Vibroport 80 device to measure natural frequency as an indicator of stiffness. The experimental design employed the Taguchi method with an L4 orthogonal array to analyze the influence of each parameter. The results showed that the number of dimple holes significantly affected the plate’s natural frequency, while the dimple diameter had no significant effect. The optimal combination producing the highest stiffness was a 25 mm dimple diameter with 16 holes. ANOVA and S/N ratio analysis supported these findings, indicating that the number of holes contributed more than 90% to the variation. This research is expected to serve as a reference for developing stiffer and more vibration-resistant metal plate designs, particularly for automotive and other engineering structure applications.

Rancangan Fixture Kursi Roda Untuk Pengguna Kursi Roda

Muhammad Basrul Muhid — 2026-02-27

Mobility for persons with disabilities remains hindered by the lack of wheelchair-friendly transportation facilities, particularly in securing and stabilizing the wheelchair during travel. This study aims to design a wheelchair fixture system for Wheelchair User Vehicles using the VDI 2222 design method, which includes four main stages: planning, concept development, design, and finalization. Concept selection analysis was carried out using the Composite Performance Index (CPI) method, resulting in the optimal combination of a spring clamp, vertical bearing guide, and upper locking locator. Simulation using SolidWorks shows that the design can withstand a load of 657.05 N (65 kg) with a safety factor value of up to 3.000, indicating the system is safe and reliable. This design is expected to provide an innovative solution for disability-friendly vehicles with a lightweight, functional, and independently operable system.

Pengaruh Optimasi Parameter Machining CNC Milling Berbasis CAD/CAM Terhadap Percepatan Waktu Pemesinan Dudukan Cetakan Kampas Rem

Ihwan Mukhtari Arifin — 2026-02-27

This study analyzes the effect of optimizing CAD/CAM-based CNC milling parameters to reduce the machining time of a brake pad mold holder. The main issue addressed is the excessive machining duration caused by non-optimal cutting parameters, namely spindle speed, feed rate, and depth of cut. A quantitative experimental approach was employed using the Taguchi method and ANOVA, integrated with CAD/CAM simulation in Autodesk Fusion 360. A 3D model of the brake pad mold holder was developed and simulated to obtain machining time data from nine parameter combinations based on an L9 orthogonal array. The results show that depth of cut has the most significant influence on machining time (87.48%), followed by feed rate (12.49%) and spindle speed (0.03%). The optimal parameter combination was 3500 rpm spindle speed, 175 mm/min feed rate, and 0.6 mm depth of cut, achieving the shortest machining time of 16.633 seconds. This optimization improved machining efficiency by 78.12% compared to the initial condition. These findings confirm that integrating statistical optimization with CAD/CAM simulation can effectively accelerate high-precision manufacturing processes for automotive components.

Analisis Pengaruh Integrasi Artificial Intelligence dan Pengembangan Kompetensi Generasi Z terhadap Keberlangsungan Organisasi

Resi Khalisya Wildani — 2026-02-27

This study uses a quantitative approach with a survey method. Data were obtained from 50 respondents who are Generation Z employees and work in various organizational sectors in Indonesia. The sample size was determined using the Lemeshow formula because the study population is not known with certainty. Data analysis was carried out using the Partial Least Square (PLS) method with the help of SmartPLS 4.0 software. The results of the study indicate that AI integration does not have a direct significant effect on organizational sustainability, but has a positive and significant effect on Generation Z involvement which in turn has a significant effect on organizational sustainability. Meanwhile, the development of digital competencies does not show a significant effect either directly on organizational sustainability or indirectly through Generation Z involvement. This finding indicates that the application of technology in organizations does not necessarily directly guarantee organizational sustainability without being accompanied by employee involvement, especially Generation Z. This study is expected to provide theoretical contributions in the development of technology-based human resource management studies and provide practical implications for organizations in designing sustainable digital transformation strategies.

Rancangan Dan Simulasi Alat Pemotong Bata Ringan Gerak Horizontal

Rizki Ardiansyah — 2026-02-27

This research aims to design and simulate a Hebel-type lightweight brick cutting machine with a horizontal motion system to improve cutting efficiency and precision at the TACON Tangan Construction production house in Bangka Belitung. The development of this tool is based on the needs of small industry players to increase productivity and reduce production costs, because most of the cutting process is still done manually. The design uses the VDI 2222 method which includes the planning, concept development, technical design, and design completion stages. This machine works with an electric motor transmission system that drives the cutting wire through an eccentric shaft, resulting in horizontal reciprocating motion. Simulation results using SolidWorks show that the machine works stably, efficiently, and safely. The design considers aspects of ergonomics, safety, and ease of maintenance. Theoretically, this design can increase cutting effectiveness by up to 40% and support the productivity of lightweight brick manufacturing.

Pengaruh Parameter Pemesinan CNC Bubut Terhadap MRR dan Kekasaran Permukaan Material ST 37 Menggunakan Metode Taguchi

Nova Rifqhi Syahputra — 2026-02-27

The machining process in the manufacturing world greatly influences its quality and productivity. One of the tools in the machining process is a CNC lathe that has parameters for its use process. The process parameters in the CNC machining process are spindle speed, feed rate, and cutting depth. Some aspects that are greatly influenced by process parameters are surface roughness and MRR (Material Removal Rate), which function as efficiency in improving product quality. This study aims to analyse the effect of machining process parameters on surface roughness and MRR on test specimens made of ST 37 material. The method in this study uses the Taguchi method with the aim of increasing productivity and product and process quality. The results of this study show surface roughness based on the use of two types of tools on ST 37 material, with the DNMG 105608-MA tool producing a roughness value of 1.128 µm and the CNMG tool producing a value of 0.865 µm. Meanwhile, the MRR value produced by the DNMG 105608-MA tool is 1,072.8 mm³/s, which is slightly superior to that of the CNMG 120408-MK tool, with an MRR value of 1,032.5 mm³/s.

Sistem Sortasi Biji Kopi Otomatis Menggunakan Sensor Warna TCS34725 dan Arduino Mega 2560

Alex Zandianto — 2026-02-27

This research aims to design and develop an automatic coffee bean sorting system based on color and weight using the TCS34725 color sensor, HX711 load cell, stepper motor, servo motor, and an Arduino Mega 2560 microcontroller. The system is proposed to address the limitations of conventional manual sorting, which is time-consuming and inconsistent in quality. The methodology includes hardware design, electronic integration, microcontroller programming, and performance testing on coffee beans with various color categories. The TCS34725 sensor is used to capture RGB values for color classification, while the load cell measures the accumulated weight of sorted beans until reaching the predefined target. Experimental results show that the developed system achieves a color detection accuracy of 92.5% and a weight measurement error of 1.8 grams on average. Furthermore, the system is capable of stopping automatically when the target weight is reached. In conclusion, the proposed sorting system enhances efficiency and consistency in coffee bean classification and has potential applications for small industries and coffee-processing SMEs.

Pengembangan Aplikasi Mobile Pembelajaran Pecahan dengan Integrasi 3D dan Bank Soal Dinamis

Mutyarsih Aghata Erviansah — 2026-02-27

Technological developments in education have opened up opportunities to introduce more interactive learning media, particularly in mathematics lessons in elementary schools, which are still dominated by lecture-style teaching methods. Students' limited understanding of fractions highlights the need for alternative media that can present the material visually and in an easy-to-understand manner. Based on these needs, this study developed a mobile learning application for fractions that integrates learning videos, 3D visualization based on Augmented Reality (AR), and a dynamic question bank. The development was carried out using the Multimedia Development Life Cycle (MDLC) method through six stages, namely concept, design, material collecting, assembly, testing, and distribution. The application was tested on 15 fifth-grade students and a mathematics teacher to assess its feasibility, ease of use, material suitability, and interface display. The test results showed that the application was considered feasible and helped students understand the fraction material more concretely, especially through the 3D visualization and instructional video features. In addition, students responded positively to the application's flow and the variety of randomly presented exercises. Thus, this application can be an innovative learning medium that supports the mathematics learning process in elementary schools.

Proses Metalurgi Serbuk Komposit Matrik Phenolic Resin di Perkuat Serbuk Logam & Arang Tempurung Kelapa

Fibry Yansha — 2026-02-27

This study aims to investigate the effect of sintering temperature variations on the hardness and density of brake pad composites fabricated using the powder metallurgy method. The fabrication process consisted of material preparation, powder mixing, cold compaction, and sintering with the weight fraction of matrix and filler wt.% being 40/60, 48/52, and 56/44 wt.%. Powder mixing was carried out using a horizontal ball mill with a ball-to-powder weight ratio (BPR) of 10:1, a rotational speed of 90 rpm, and a milling time of 4 hours. Cold compaction was performed uniaxially at a pressure of 5300 PSI for 10 minutes, followed by sintering at temperatures of 50°C, 60°C, and 70°C for 10 minutes. Density testing was conducted based on Archimedes’ principle in accordance with ASTM B962-17, while hardness was measured using a portable Brinell hardness tester following ASTM E110-14. The highest hardness value of 103.0 HB was obtained at 48% matrix composition with a sintering temperature of 60°C, while the highest density of 1.453 g/cm³ was achieved at 40% matrix composition with a sintering temperature of 70°C. These findings demonstrate that sintering temperature has a significant influence on the mechanical and physical properties of the brake pad composite.

Rancang Bangun Aplikasi Web Pojok Literasi Statistik Sebagai Media Litarasi Statistik Di BPS Provinsi Kepulauan Bangka Belitung

Muhammad Hilal Ramadhan — 2026-02-27

The high number of students or university students as users of statistical data recorded by the Central Statistics Agency (BPS) is not matched by adequate understanding. These data are widely processed and used as a basis for research. Although data information is widely available, many people still cannot understand and utilize the data effectively. In today's digital era, it is imperative for BPS to undergo digital transformation, especially in terms of disseminating statistical products to remain relevant to the times. The purpose of this study is to design and develop a digital innovation in the form of a website-based statistical literacy media application to improve statistical literacy and the dissemination of statistical products. The method in this research consists of five stages, namely collection and analysis of needs, prototyping, prototyping evaluation, coding, testing, and system evaluation. The results of the research in the form of system testing using blackbox testing showed a 93.75% success rate, which means that this application is running and functioning as expected.

Analisis Pengaruh Nozzle Temperature dan Wall Thickness pada Proses FDM Terhadap Kekuatan Mekanik Filamen PETG

Luthfi Maulana A — 2026-02-27

3D printing has rapidly developed as part of additive manufacturing, with Fused Deposition Modeling (FDM) being widely used due to its low cost and ease of operation. PETG is a popular FDM material because of its good mechanical properties and temperature resistance. However, print quality is strongly influenced by process parameters. This study evaluates the effect of FDM parameters on the impact strength of PETG and determines the optimal settings. The investigated parameters were Nozzle Temperature and Wall Thickness, each tested at three levels. The experiments were designed using the Taguchi method with an L9 orthogonal array, producing nine sample combinations. Specimens were printed using a Haltech H-01 3D printer and tested with the Charpy impact method on a GOTECH GT-7045 machine. Data were analyzed using the Signal-to-Noise Ratio with the “Larger is Better” criterion. Results show that Nozzle Temperature has a more significant effect on impact strength than Wall Thickness, indicated by a higher Delta value and greater variation in mean response. The optimal parameters were a 250°C Nozzle Temperature and 2.5 mm Wall Thickness, providing the best mechanical performance and consistency.

Analisis Pengaruh Cutting Speed, Depth of Cut dan Feed Rate CNC Milling Terhadap Kekasaran Permukaan Aluminium 6061 Menggunakan Respons Surface Methodology (RSM)

Wahyudi Asri — 2026-02-27

The development of modern manufacturing industries demands increased process efficiency and high-precision machining quality. One of the key factors determining product quality is surface roughness, particularly in Aluminum 6061, which is widely used in the automotive and precision manufacturing industries due to its light weight, strength, and corrosion resistance. An improper combination of machining parameters can reduce surface quality and process efficiency. Therefore, this study aims to analyze the effect of cutting speed, depth of cut, and feed rate on the surface roughness of Aluminum 6061 and to determine the optimal parameter combination. The analysis was conducted using the statistical method Response Surface Methodology (RSM). The results show that all three machining parameters significantly affect surface roughness, with the optimal combination obtained at a cutting speed of 70 m/min, feed rate of 318.3 mm/min, and depth of cut of 0.7 mm, producing the lowest surface roughness value of 0.224 µm (Ra).

Aplikasi Test Pengajaran Bahasa Inggris Di Laboratorium Bahasa Polman Babel

Raihan Alghifari — 2026-02-27

This study aimed to develop a mobile-based English teaching test application used in the language Laboratory of Polman Babel. Before this study was conducted, the evaluation process of English learning still used paper-based tests, which required a long correction time and carried a risk of scoring errors. The developed application provided a solution by offering a digital testing system that displayed questions, received student answers, and automatically generated results. The research applied the Research and Development (R&D) method with a waterfall approach consisting of requirement analysis, system design, implementation, testing, and evaluation. The application was developed using the Flutter framework for the user interface and Laravel for data management on MySQL. The testing results showed that the application functioned properly and improved the efficiency of the assessment process while reducing correction errors. Therefore, this application was expected to serve as an innovative alternative to support the digitalisation of English learning assessment in higher education institutions

Rancangan Sistem Kemudi Handlebar dengan Mekanisme Rack and Pinion pada Kendaraan Disabilitas

Michael Salim Wijaya — 2026-02-27

Obstacles in the mobility aspect for people with disabilities can interfere with daily activities. The current era of technology has created many innovative tools and vehicles for people with disabilities, especially cars for wheelchair users. Safe and comfortable driving requires a good steering system, this can also support driving performance for people with disabilities. This research aims to support car driving performance for people with disabilities by providing new innovations in the steering system, namely the use of a portograf handlebar with a rack and pinion mechanism for movement of vehicle front wheels. The process of designing the handlebar steering system was carried in systematically using the VDI 2222 method which includes planning, conceptualizing, designing and finishing. The design results show that the portograf handlebar steering system with a rack and pinion mechanism has maximal performance based on analysis of critical components according to the needs of riders with disabilities.

Analisis Keandalan Mesin Digester Menggunakan Metode Failure Mode And Effect Analysis Di Pabrik CPO PT Mas

Hegel Tottamor — 2026-02-27

The digester machine is a critical unit in the palm oil processing industry, functioning to soften and mash palm fruit to enable optimal oil extraction. The reliability of this machine plays an important role in ensuring the continuity and efficiency of crude palm oil (CPO) production. This study aims to analyze the reliability of the digester machine at the CPO plant of PT MAS using the Failure Mode and Effect Analysis (FMEA) method. Research data were obtained through direct field observation, interviews with operators and maintenance technicians, and analysis of historical machine failure data from January to December 2024. Each failure mode was evaluated based on severity, occurrence, and detection parameters to determine the Risk Priority Number (RPN), which was used to establish maintenance priorities. The results indicate that the Expeller Arm and Short Arm components have the highest RPN values, identifying them as the most critical components with the highest risk of failure. Based on these findings, maintenance recommendations and corrective actions focused on critical components are proposed to improve the reliability of the digester machine, reduce downtime, and support efficient and continuous CPO production at PT MAS

Pengaruh Tekanan Kompaksi Panas Satu-Arah Terhadap Karakteristik Komposit Phenolic Resin Diperkuat Serbuk Logam dan Boiler Fly-Ash

Devrin Dwiki Saputra — 2026-02-27

Brake pads are generally manufactured using 60% asbestos. Although still widely used, asbestos is not environmentally friendly and poses serious health risks due to its carcinogenic properties, which can cause respiratory disorders when inhaled. Therefore, new environmentally safer innovations are needed, such as phenolic resin matrix composites. This study aims to analyze the effect of matrix percentage and compaction pressure on the density and hardness of phenolic resin matrix composites reinforced with aluminum, brass, silica sand, and boiler fly ash. The powder metallurgy method was applied, consisting of mixing, compaction, and sintering processes. Mixing was carried out using a horizontal ball mill with a Ball Powder Ratio (BPR) of 10:1 at 90 rpm for 4 hours. Matrix compositions of 25%, 29%, and 33% were tested, along with compaction pressures of 5100, 5400, and 5700 psi for 10 minutes. Density testing followed ASTM B962-17, and hardness testing used ASTM E110-14. The highest hardness before sintering was 154 HB, and the highest density was 1.308 g/cm³ at 5700 psi. After sintering, hardness increased to 216 HB and density to 2.120 g/cm³ at 5700 psi with 25% matrix composition.

Pengembangan Aplikasi PKL Track Berbasis Android untuk Monitoring Praktik Kerja Lapangan di SMKS Muhammadiyah Mentok

Jinan Khalishah — 2026-02-27

The Internship Program (PKL) at SMKS Muhammadiyah Mentok faces several challenges, one of which is that the processes are still carried out manually, such as submission, attendance, daily reports, and scheduling of evaluation and monitoring for students. This condition often leads to errors and inefficiency. PKLTrack is an Android-based application developed as a solution to these problems, In this system development, several main features are included, such as online internship submission, GPS- and geofencing-based attendance equipped with selfies, daily report submission, evaluation and monitoring schedule notifications, and direct assessment by partner institutions. This study adopts the prototype method, with data collection techniques including interviews, observations, and literature studies for needs analysis. The User Acceptance Testing (UAT) was conducted on 30 students and resulted in an 87% success rate, indicating that the system is highly feasible to be used as a monitoring solution. The results show that PKLTrack can improve effectiveness, efficiency, and discipline in the implementation of the internship program.

Digital Governance Model for QR-Based Laboratory Asset Management

Putra Baruna Wijaya — 2026-02-27

Laboratory asset management in academic environments is commonly administrative and manual, resulting in low efficiency, accountability, and transparency. This study aims to formulate a digital governance model for laboratory asset management through the application of a web-based information system integrated with QR Code technology and automated notifications. The research method involves system design, real-time asset identification implementation, and user acceptance evaluation using User Acceptance Testing (UAT). The results indicate that QR Code and notification integration not only improves operational efficiency but also establishes a structured and traceable asset control mechanism. User satisfaction exceeding 90% confirms that the system supports transparency and accountability principles in laboratory asset governance. This study contributes an applied digital governance principle that can be generalized to other institutional asset management contexts.

Analisis Desain Cetakan Paving Blok Hexagonal

Bagas Adi Saputro — 2026-02-27

Plastic molds offer lighter weight, ease of design modification, and the ability to produce very large quantities of products due to the ability to cast with multiple molds simultaneously. However, they are susceptible to thermal deformation due to pressure during the casting process. This condition can cause dimensional deviations outside the tolerance limits set by the British Standards Institution (BSI), which is ± 2 mm. This research focuses on the design analysis of hexagonal paving block molds made of Polypropylene (PP) using the SolidWorks Simulation approach to evaluate the effect of variations in the number of reinforcements (ribs) on the deformation and stiffness of the mold design. Paving block models have four design configurations: no ribs, one rib, two ribs, and three ribs. The analysis results show that all designs are still within the maximum deformation tolerance limit, but increasing the number of ribs significantly increases stiffness and decreases total deformation. The three-rib configuration produces a minimum deformation of 0.5059 mm, making it the most optimal design in maintaining mold dimensional stability. This research provides a scientific basis for the development of optimal, precise, and BSI-standardized paving block molds with Polypropylene material for mass production of paving blocks.

Analisis dan Simulasi Mesin Pencetak Keripik Telur Cumi

Ricky Tri Putra Ananda — 2026-02-27

Squid egg chips are one of the typical foods of Bangka Belitung, which are still produced manually, making them inefficient in terms of time and energy. Manual production of squid egg chips in Bangka Belitung faces challenges in terms of efficiency and product consistency. This study aims to design and simulate a squid egg chip molding machine using a systematic approach based on the VDI 2222 method. The stages include needs analysis, concept development, technical design, and evaluation through load simulation using software such as Fusion 360 and MD Solid. The developed machine has an electric motor drive system, pulley and belt transmission, and main components such as a hopper, dough press screw, and dough mold. The simulation results show that the machine design works well and can withstand an operational load of up to 118.87 N, equivalent to ±12 kg. The system can be operated by one person with more efficient production time compared to the manual method. However, the dough cutting mechanism still needs improvement to achieve a uniform and aesthetically optimal chip shape.

Pengaruh Bed Temperature Dan Print Speed Pada Proses Fdm Menggunakan Filamen Polypropelene Terhadap Kuat Tarik

Idola Brilian — 2026-02-27

The experimental results demonstrate that bed temperature and print speed exert significant effects on the tensile strength of polypropylene components produced via FDM. An increase in bed temperature consistently improves tensile performance, with the optimal strength obtained at 75°C. Higher bed temperatures promote stronger interlayer diffusion and reduce residual thermal stress. In contrast, increasing print speed generally leads to a decline in tensile strength due to limited bonding time and the formation of voids within the printed structure. The combination of high bed temperature and low print speed yields the most favorable mechanical properties. Overall, the study confirms that precise control of thermal and kinetic parameters is essential for enhancing the mechanical integrity of polypropylene parts manufactured through the FDM process.

Perbandingan Mata Pisau Cutter, Silet, Pisau Ukir Kayu dan Pisau Blender Daging Untuk Mesin Pencacah Plastik Kemasan 220ml Portable

Yuyu Nofriyanto — 2026-02-27

This study aims to compare the performance of four types of blades, namely cutter knives, razor blades, wood carving knives, and meat blender knives, on a 220 ml portable plastic packaging shredder. The research was conducted through experimental testing to determine the durability and cutting efficiency of each type of blade under workload during the shredding process. The test results showed that the wood carving knife had the best performance with a cutting force of 1 N, producing the highest number of cuts, totaling 41 plastic cups compared to the other knives. The cutter knife ranked second with 38 cuts, while the razor blade and meat blender knife showed the lowest results. The combination of an optimal wedge angle and low cutting force makes the wood carving knife the most efficient choice for a portable plastic shredder. The results of this study are expected to serve as a reference in selecting effective and economical blades to support small and medium scale plastic waste recycling process.