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With all respect and gratitude, we express our gratitude to the presence of Allah SWT who has bestowed His grace and grace, so that we can complete a paper entitled "Development of Hear Talk Me Application Design for Deaf People Based on the Android operating system". Shalawat and salam may always be poured out to the Prophet Muhammad SAW, a role model for mankind. This paper describes the development of smarthphone aids that aim to improve accessibility for deaf people. This application is designed using the android operating system to be easily used by users with special needs. The main features included include text to voice translation and vice versa, as well as vibration notifications for incoming calls or messages. With this paper, we hope to create a useful and effective tool for deaf people to be able to access and utilize Smartphone functions maximally, hopefully this paper can provide useful insights and inspire further research in the development of accessibility technology

In simplifying the process of monitoring the temperature of electric vehicle batteries, especially in discharging conditions, a remote electric vehicle battery temperature monitoring system was created. The problem with the previous monitoring system was that there was no electric battery temperature monitoring system, so users could not monitor the temperature condition of the vehicle battery when in use. The purpose of this study is to design an Internet of Things (IoT)-based electric vehicle battery temperature monitoring device system using the web and add a data logger to monitor battery temperature remotely and find out the difference in temperature values from the device with a thermogun. And the addition of a cut off feature when the battery overheats as one of the safety. The research method uses experiments, namely by comparing the speed between 30km/h and 50km/h and comparing the readings of the monitoring device with a thermogun. In proving the performance of the monitoring equipment, it is carried out with a distance of 1km, 2km, and 3km and in sloping road conditions. The data obtained were then analyzed using the paired T-test method. The results of the study showed that the tool worked quite well with the highest error value of 3.88%. And the battery temperature value between the speed of 30km/h and 50km/h is a significant difference with a P-value result of 0.035 which means that H0 is rejected and H1 is accepted.

Every company that carries out production activities needs a supply of raw materials. With the availability of raw materials, it is hoped that industrial companies can carry out the production process according to consumer demand. In addition, adequate supplies of raw materials in the warehouse are also expected to improve the smoothness of production or service to consumers, as well as prevent shortages of raw materials. This research aims to identify and analyze the inventory management of raw materials implemented by the National Tofu Factory. The research method used is descriptive, with analysis using the Economic Order Quantity (EOQ) method. The data collected is in the form of interview results as primary data. The results of the research show that the management of raw material inventory by the National Tofu Factory has not been optimal. Based on the EOQ calculation, the amount of existing raw material inventory is smaller than what is recommended by the EOQ method. Therefore, additional raw material supplies are needed to support the smooth production process. The National Tofu Factory is also advised to provide adequate warehouses to store raw material supplies, especially for soybeans, so that they can accommodate more raw materials and reduce ordering costs.

Technological development is urgently needed to handle rice drying, namely by designing and designing rice drying machines, by utilizing heating from burning LPG gas which is arranged in an integrated system. The purpose of this paper is to design and design a rice drying machine, selecting machine components and including analysis of the strength of the dryer shaft by knowing von Misses stress, displacement and safety factors.  The design of the rice drying machine uses 1 source of electric motor driving power to operate an integrated drying and heating system. With the power of 0.5 HP (0.37 kW) it is planned to be able to dry rice with a capacity of 30 kg/hour. The power generated by the electric motor is used to move pulley-1 (drive), which is transmitted using  V-belt transmission to move pulley-2 (gear box and dryer blower). The length of the first belt transmission (L) is 813 mm and the second is 1270 mm. And uses a chain transmission with type number 40 which has a distance of 12.70 mm with a chain length of 76 links. The bearing used is a radial ball bearing with a single row UCP 205. Based on the results of the analysis of the rice drying machine shaft using solidwork software, Von Misses stress value is 40.55 MPa, displacement value is 0.19 mm, and safety factor value is 13.07, so from the simulation results this rice drying shaft can be said to be safe in accepting workloads

The purpose of the study is to create an appropriate marketing strategy for CV. Mustika Agung, a furniture craftsman in Magetan Regency. Primary data collected in this study were collected through interview methods. The results of the SWOT analysis of CV. Mustika Agung show that the formulation of a marketing strategy requires changes in the market, product design, production process, and advertising and marketing. This study will help solve the problems that exist in CV. Mustika Agung so that the resulting strategy will help the company survive and grow

This research aims to analyze personality and communication styles in business negotiations. By examining various personality types such as extraverted, introverted, agreeable, conscientious, and neurotic, this study explores how personality characteristics influence communication strategies in the negotiation process. Through surveys and in-depth qualitative analysis of business professionals, the research found that individuals with extraverted personalities tend to be more proactive in taking initiative, whereas introverts are more inclined to deliberate carefully before acting. The communication styles employed also vary based on individual personalities. This research indicates that a deeper understanding of the role of personality in business communication can enhance negotiation effectiveness and improve final outcomes. The practical implications of these findings underscore the importance of adapting communication strategies based on the personality characteristics of negotiation participants to achieve success in dynamic and complex business environments.

The high competition in the property industry requires companies to maintain high occupational safety and health (K3) standards. Data from the engineering division of PT Gaia Care International shows that in the period January-November 2023 there were 11 work accidents, with the majority being minor accidents and one fatal case. This study aims to identify potential risk hazards, analyze risk levels, and determine appropriate risk control measures.  The HIRARC method is used in three stages: Hazard Identification, Risk Assessment, and Risk Control. The results showed that there were various potential hazards such as electrocution, falling from stairs, and exposure to chemicals. The risk assessment classified 5 work activities as low risk, 43 as medium risk, and 2 as high risk and no extreme risk was found. Risk control efforts are carried out using fishbone diagrams and 5W+1H techniques to reduce or eliminate existing risks.  This research is expected to provide benefits for companies in reducing the number of work accidents and become a reference in implementing better OHS policies, as well as providing additional insight for readers regarding the importance of risk analysis in creating a safe and healthy work environment.    

The ignition system is an important system in a vehicle. Currently, the level of emissions produced by vehicles continues to increase every year. This can be caused by high fuel consumption values. The solution to this is to improve the quality of the spark plug by adding a capacitor to the ignition/ignition capacitor. The way the Plasma Capacitor Igniton works is by adding a high voltage non-polar capacitor which is connected in parallel to the output coil. The experimental method will be carried out using quantitative methods. By installing ignition plasma capacitors with different capacitor sizes of 1.5 mF (STD), 440 pF, 660 pF installed in parallel with the spark plug wires with variations in engine speed running from 1500 – 5500 rpm to check emissions. To check the fuel consumption value for Rpm 4500 - 9500 which has been adjusted previously. Fuel Consumption Test Results The use of 440 pF capacitors generally provides an increase in SFC efficiency at most engine speeds, with the largest percentage reduction at RPM 5500 (22.64%). The use of 660 pF capacitors shows varying results. At some RPMs, such as 5500, the SFC actually increases (3.77%), while at other RPMs such as 6500, it shows a significant decrease (27.66%).

Carrying out construction activities is a complicated activity, problems often occur in the implementation of construction projects causing the owner to experience losses, obstacles that are often faced include delays in project completion time, project cost overruns and inconsistencies in the quality and quality of construction projects. As a solution, competent experts are needed who can manage and control construction projects to avoid the obstacles that often occur. Young Construction Management Experts are one of the experts regulated in SKKNI No. 390 of 2015 to manage and control all activities starting from the planning, design, tendering, implementation, to the post-implementation stages of construction projects. This article aims to identify the competencies needed to become a Young Construction Management Expert using the literature study method. The results obtained were 30 competencies of Young Construction Management Experts which were grouped into 3 aspects, namely knowledge aspects, skills aspects and attitude aspects. These 30 competencies were obtained from SKKNI and relevant journals and books.  

Uniaxial Compressive Strength is a test method to classify the strength and characterization of intact rock. Where it is important information in determining the strength and characteristics of a rock obtained by testing using the UCS tool. In this research, an alternative is made in determining the UCS value precisely and easily, namely by using the schmidt hammer test and compressive strength test. Therefore, this research aims to obtain the correlation value between the results of the compressive strength test and the schmidt hammer test on sandstone. Based on the results of observations and calculations that have been carried out, it can be concluded that the compressive strength value in the Balikpapan formation is lower than the compressive strength value in the Pulaubalang formation where the compressive strength value in the Balikpapan formation is 3.3 MPa-4.3 MPa, while the compressive strength value in the Pulaubalang formation is 4.3-5.57 MPa. The rebound number in the Balikpapan formation is lower than the rebound number in the Pulaubalang formation, where the rebound number in the Balikpapan formation is 16-17.8, while the rebound number in the Pulaubalang formation is 18-22.3. The correlation of the uniaxial compressive strength value with the rebound number of the schmidt hammer shows a positive linear correlation between the UCS value and the rebound number of the schmidt hammer, in this case it can be seen that when the uniaxial compressive strength value is higher, the rebound number of the schmidt hammer is also higher.

The use of automation systems is needed in sorting, one of which is the sorting of objects based on the size of the object being sorted. Especially in the sorting process, there are still many industries that use conveyors that only function for one product with the same weight characteristics. Therefore, to sort the same goods with different weights, a separate conveyor is needed so that many conveyors are used. The development of a sorting machine is an important aspect in the modern automation and manufacturing industry. This research aims to design and analyze the static loading of the sorting machine frame using SOLIDWORKS software. The design method used includes detailed 3D modeling of the machine frame by considering the strength, stability and reliability of the structure. The simulation results using SOLIDWORKS software show the stress (von Mises) with a maximum value of 82.26 MPa, while the theoretical calculation result is 84 MPa. Displacement with a maximum value of 4.063 mm, while the theoretical calculation result is 1.60 mm. The safety factor is 2.38, while the theoretical calculation result is 2.43. The difference between manual calculation and simulation is 0.02% for von Mises stress, 1.5% for displacement, and 0.02% for safety factor.

Universitas Teknologi Yogyakarta (UTY) operates several computer laboratory rooms used daily by students according to their scheduled times. Sometimes, these rooms experience sudden schedule changes, causing conflicts with other room bookings. This research aims to employ an Augmented Reality (AR)-based application for monitoring the dynamic schedule of lab room usage. The method utilizes a marker-based AR application, tested through black box implementation. The application successfully reads markers at distances of 10–90 cm, tilt angles of 10–80 degrees, and light intensities ranging from 40 to 250 lux. Under these conditions, the markers are readable, and the application responds by displaying virtual objects. Users of the lab rooms can utilize this AR application to identify changes in the scheduled usage plans at UTY as they occur.    

Coal is one of the energy sources that is the basis for meeting energy and electricity needs in various countries, including Indonesia. Coal obtained from mining contains impurities, which can occur during coalification or during the mining process. There are impurities elements found in coal such as sulfur, ash and various other minerals found in coal. The sampling location was carried out at the mining location at PT Bukit Baiduri Energi, Kutai Kartanegara Regency, East Kalimantan Province. The solutions used in the deashing process using the leaching method are NaOH and HCl.  

The three main factors determining combustion efficiency in Otto engines are optimal compression pressure, effective ignition, and fuel quality. In this study, two critical variables—fuel pump pressure (38, 43, and 48 Psi) and fuel type (RON 90 and RON 92)—were analyzed to understand their impact on specific fuel consumption (SFC). An experimental research method was employed to test the effect of independent variables on dependent variables under controlled conditions. The results indicate that a fuel pump pressure of 43 Psi provides the most stable and efficient fuel consumption performance for both fuel types across the entire engine speed range. A fuel pump pressure of 38 Psi is optimal at medium engine speeds but less efficient at high speeds, whereas a pressure of 48 Psi is most efficient at low to medium speeds but decreases in efficiency at high speeds. Overall, RON 92 fuel shows an efficiency improvement over RON 90, particularly at medium to high engine speeds. The combination of a fuel pump pressure of 43 Psi and the use of RON 92 fuel is recommended to achieve optimal specific fuel consumption, as it provides consistent efficiency across various engine operating conditions.

The activity of dismantling shale sometimes does not align with the rating of the shale itself. Although shale generally has low durability, some types of shale exhibit considerable strength. Therefore, if the tools used are not suitable, the excavation process becomes inefficient. One shale classification method proposed by Franklin (1982) is by determining the value of slake durability index, plasticity index, and point load index. If the slake durability value exceeds 80 percent, testing continues with point load testing. However, if the slake durability value is below 80 percent, then liquid limit and plastic limit tests are conducted to obtain its plasticity index. This study is applied to the Kampungbaru Formation at PT Bintang Prima Energi Pratama. The shale testing results of the Kampung Baru Formation at PT Bintang Prima Energi yielded slake durability index values below 80 percent, thus the shale ratings based on slake durability index and plasticity index values, for KB1BL1 are 4.2; KB1BL2: 3.5; KB1BL3: 2.55; KB1BL4: 3.35; KB1BL5: 3.15; and KB1BL6: 3.65. With an average shale rating value of 3.57. The excavation tool used for these rocks is a backhoe.

Rock strength has an important role in the mining industry. These forces can determine many aspects of mining such as slope geometry, excavation, blasting, and drilling. Rock strength can include tensile strength, compressive strength, and shear strength. In this case, the test is carried out to determine the correlation of uniaxial compressive strength and indirect tensile strength. The method used to determine the correlation of compressive strength and indirect tensile strength is by linear regression approach, which will then be analyzed for accuracy through Root Mean Square Error (RMSE), and Mean Absolute Percentage error (MAPE). This study used quantitative and qualitative methods, starting from the coordinate data of rock sampling locations, physical properties and mechanical properties. In this study, there were 6 sampling locations located in 2 different areas, namely Loa Janan and Sanga-sanga. The secondary data used are regional geological maps and maps of the area where the study is located. Furthermore, secondary data is processed using Arcgis software for mapping, and using Microsoft Excel software to assist in calculations in determining the value of physical and mechanical properties of rocks. The results of the compressive and tensile strength tests in this study showed a perfect corelation using linear regression, namely UCS= 3.9582 σt - 0.4004, with a correlation coefficient (R) of 0.972 and a determination coefficient (R2) of 0.945. and obtained RMSE 0.033 and MAPE 5.89%.

Rotary drilling is one of the drilling methods that is often used for stripping overburden in open pit mining activities. In the rotary drilling process, prediction of the penetration rate is very important for scheduling production and estimating drilling costs. Drilling in mining activities is used, among other things, to create blast holes. In blasting activities, drilling is the first activity that must be carried out to provide a blast hole which will later be filled with explosives to be detonated. Meanwhile, the speed at which the blast hole is prepared is influenced by the speed of the drilling tool to penetrate the rock. Drilling speed is influenced by two factors, namely internal factors and external factors.      

The main purpose of this study is to investigate in depth regarding the planning of electrical panels to be used in elevator systems. The method used is a literature study followed by the creation of panels and data collection. This process starts from the initial stage, namely making drawings of the electrical panel series, then continues with construction planning and installation of the overall elevator system. Selain itu, pengecekan berkala terhadap kualitas lift yang dipasang juga menjadi fokus utama dalam penelitian ini. This is important to ensure that elevators operating in these tall buildings can maintain safety and comfort when used by people and in the process of transporting goods to various floors of the building. Thus, it is hoped that the results of this study can make a meaningful contribution in improving the efficiency and safety of vertical transportation within modern high-rise buildings.

Carrying out work practices in this industry is one of the requirements for the industrial practice course. This practical activity aims to find out directly the state of the industry in terms of work readiness. The aim of this industrial practice activity focuses on finding out what components are contained in the Star-Delta hydrant pump panel, knowing the process of installing the Star-Delta hydrant pump panel and knowing how the Star-Delta panel works. In implementing this industrial practice, observation methods, library observations and interviews are used. PT. Tiga Kreasi Indonesia is a company that operates in the field of manufacturing electrical panels, with one of its products being Star-Delta hydrant pump panels to stabilize air pressure in hydrant pump lines. The hydrant pump's star delta panel functions to control and secure what happens if undesirable things happen, such as protecting a building or factory. This research produces new knowledge and understanding regarding the design of Star-Delta Panel hydrant pumps which are widely used in homes, factories and offices to minimize the occurrence of fires.

Drilling is an essential operation in mining activities, particularly in borehole preparation for blasting purposes. The efficiency of blasting hole preparation depends significantly on the drilling speed to penetrate the rock formations.Drilling Rate Index (DRI) measures the ease or difficulty of drilling through rock formations. It combines two tests: Brittleness (S20) and SJ value. DRI serves as a common metric to predict drilling capabilities and is classified according to a table classification of drilling rate index.The classification of DRI values for sandstone and mudstone of Balikpapan Formation at PT. RCI Job Site ABK indicates a very high classification with DRI values ranging from 66 to 86. Testing results for samples SBP1 (DRI 75.9), SBP2 (DRI 81.7), SBL1 (DRI 66.6), and SBL2 (DRI 71.1) all fall within the very high classification range.