Occupational Health and Safety (OHS) risk management is an effort made to manage the risks of work accidents to minimize the risk of work accidents in a company. The aim and target of OHS risk management is to create an OHS system in the work environment that involves all parties, so as to reduce the number of workplace accidents and create a safe workplace. Therefore, it is necessary to conduct further research on the implementation of the OHS risk management system in the company. In this research, identification and analysis of accident risk have been successfully carried out, as well as making suggestions for risk mitigation in a company in the corrugated carton box sector. In addition, work accident investigations have also been carried out to determine the cause of a work accident and detect latent sources of hazards that were not detected in the risk identification process.

With the advent of the Industrial Revolution 4 (IR4), many new challenges have emerged. One such issue is privacy and security. Millions of devices are now connected to the internet, and there is no concrete way to ensure that the user has authority (or) control over its data. This study addresses this challenge by drawing a theoretical framework for IoT software that can provide mathematical proof to the user regarding the privacy of the data. Such a certification would ensure that the data remains confidential as well as it will accelerate the rate of adoption of IoT technologies.

Evolution of Wireless Body Area Network (WBAN) in telemedicine field keep increased along with needs and enhancement of services, nevertheless an efficient and effective form of communication becomes essential for any type of wireless communication network. One of the most important parameter for designing communication network is path loss exponent. Based on that, the purpose of this research is to know the propagation characteristics for on-body and off-body communication by comparing the simulation and measurement using magnetic textile antenna at 2.45 GHz and 924 MHz with distance variation in LOS and NLOS conditions. In this research, friis formula is used to get the path loss exponent value that shows the characteristics of propagation. The calculation of path loss exponent value for simulation and measurement for on-body communication with LOS and NLOS conditions are between 1.7-1.9 while off-body with LOS and NLOS conditions are between 2.1-5.2. These results show that the body affects path loss exponents value and have own characteristics.

Calculation of Pressurized Fan Capacity and Static Pressure for Wisma Sudirman Building – Jakarta. A Pressurized staircase is a significant piece of the fire safety strategy of tall structures. Long departure times are repaid by making safe conditions inside departure staircases permitting considering the uprooting time inside those stairs as time where inhabitants can be viewed as sheltered. In accordance with Minister of Public Works Regulation No: 26/PRT/M/2008 concerning Technical Requirements for Fire Protection Systems in Buildings and the Environment, in every building where the occupied height exceeds 24m, each internal fire stair must be pressurized according to the requirements in the regulation. All pressurization requirements for fire stair in this regulation must comply with the applicable standard provisions in SNI No. 03-6571-2001 or latest edition. The capacity and static pressure of the fire stair fan has been calculated for the Wisma Sudirman building, Jakarta, which obtained a capacity of 34,820 cfm and a static fan head of 2.42 "WG.

This paper aims to present a comparison between the Naive Bayes model and the Tree Augmented Naive Bayes (TAN). This comparison is preceded by a philosophical explanation of the two in the author's way of understanding. Then this comparison was carried out in the case of making a predictive model for the final exam scores of students at the Muhammadiyah University of Ponorogo. In this case, we apply two different models, namely Naive Bayes and Tree Augmented Naive Bayes (TAN) to predict learning outcomes before ending at the end of the semester in terms of lecturers' assessments of students. When the course is in progress, the lecturer needs to continuously evaluate students' understanding of the subject matter being taught. This is so that lecturers can immediately anticipate learning problems in class. Calculations with these two models use only R language with jupyter notebook interface. Validation and testing of the two models used a case dataset in 4 classes of language theory and automata course students even semester 2017-2018 at the Department of Informatics Engineering, Faculty of Engineering, and University of Muhammadiyah Ponorogo with a dataset size of 99 notes (99 students). For the validation and model testing methods, k- fold and hold-out cross-validation are used. Each model is validated and tested with the same k-fold method scheme.

Growing demand of aluminium in domestic and international markets, forcing aluminium producers to modify their smelter to increase the production as well as to reduce the electricity consumption, though to build a new aluminium smelter plant is one of solution to meet this demand. This article is described modification one of the aluminium smelter plant in North Sumatera Province, Indonesia as a parts of aluminium smelter upgrading project to reach production up to 300,000 TPY.

Transfer Pump Selection for Oyama Hotel. The calculation and selection of the transfer pump has been carried out in the clean water installation of the Oyama hotel building. Transfer pump is required to move (lift) clean water from the ground water tank to the roof tank. The pump selection method is based on calculation of pump capacity and head. Pump capacity calculation is based on water demand during peak hours. Pump head calculation is based on static head and friction loss in the piping. From the results of the calculations, the capacity is 20m3/hour and the pump head is 9 bars.