learning, communication, and data management activities. This study aims to design a LAN network topology that suits the needs and environmental conditions, both at home and in small to medium-scale educational institutions. The methodology used includes hardware requirements analysis, network topology selection, and simulation using software such as Cisco Packet Tracer. The design results show that the use of a star topology for home networks and a combination of star and extended star topologies for schools provide optimal performance in terms of speed, scalability, and ease of maintenance. This design also takes into account aspects of security, cost efficiency, and ease of future development. The development of information technology drives the need for reliable and efficient computer networks, especially in home and school environments. The design of Local Area Networks (LANs) is an important solution in supporting integrated

Purpose: The cardiovascular system is a vital system responsible for the distribution of oxygen and nutrients throughout the body. The complexity of interactions between the heart and blood vessels often presents challenges in monitoring and analyzing health conditions. The research proposes the development of a Human Digital Twin (HDT) for the cardiovascular system through application of two different modelling approaches geometric modeling and physic-based modeling. Through this model physical conditions can be represented and real time data integrated to offer insights into the dynamics of the cardiovascular system.
Methods: This model development is based on two major components: a geometric modeling and a physic-based modeling. The geometric model is done in 3D to show the structure of the heart in detail, while the physical-based model is tabulated with different measurable physical parameters in the cardiovascular system, such as blood pressure and flow rate. This information is integrated into the Five Dimension Digital Twin model, including physical, virtual, data, connection, and service dimensions for the accurate simulation of cardiovascular conditions.
Result: Results confirm that the Five-Dimensional Digital Twin (DT) could give further development to how the dynamics of the cardiovascular system behave, possibly in real-time updates on conditions and a supply of data that is far more detailed in view of analyzing risk and further representation of specific cardiovascular disorders while providing personalized medical support.
Novelty: The Five-Dimensional Human Digital Twin Model (HDTM) developed in this research introduces novel innovations in the monitoring and simulation of the cardiovascular system through the application of geometric and physic-based modeling techniques. This approach offers a higher level of detail, compared to previous models, and added value for the advancement of health technology by integrating real time data into the simulations. This model serves not only as an advanced analytical tool but also as a reference for further research on DT technology in the medical field.

Chronic diseases are degenerative conditions that significantly impact an individual's quality of life. Various degenerative diseases, such as diabetes mellitus, hypertension, and heart stroke, require immediate attention. Indonesia faces a dual burden in healthcare, grappling with both rampant infectious diseases and the rising prevalence of chronic degenerative illnesses. Therefore, health promotion efforts are crucial in preventing degenerative diseases among adolescents. This initiative targets teenagers due to their unhealthy lifestyle choices, which are evident in their smoking habits, poor dietary practices, insufficient consumption of fruits and vegetables, and a lack of physical activity. The primary objective of this initiative is to enhance awareness regarding the prevention of degenerative diseases among youth and to address the emergence of such conditions in this age group. The results of the community service activities indicate a notable increase in average knowledge from 6.61 to 13.80 and an improvement in attitudes from 9.61 to 14.47. The community service activities were successfully executed, as evidenced by the smooth conduct of the events and the active participation of the adolescents. To improve health quality, it is essential to foster awareness and enhance education among teenagers about the prevention of degenerative diseases.

This research aims to analyze efforts to implement positive habits with refraction practices at the SMA Caritas Chatolic. This school always applies the 3s culture (smile, greet, greet) to create a supportive and harmonious environment. Every morning we always pray together in the Maria cave which is right in front of the school to increase students' religious and spiritual values. Apart from that, every Saturday there is always community service to instill the spirit of mutual cooperation, as well as various extracurriculars, such as fighting, cricket and futsal. This was developed to shape students' skills and character. Even though this program is running well, there are also challenges faced, such as the lack of involvement of some students in school activities which is still a concern.

Heat exchangers transfer heat from a high temperature to a low temperature in a fluid. Air-cooled heat exchangers are one of the most widely used types of heat exchangers, after shell and tube heat exchangers. Its performance is determined by calculating the fouling factor value and the pressure drop. The purpose of this case study is to evaluate the performance of a water-cooled heat exchanger in a plant that produces a thickening agent (CMC, or carboxymethylcellulose), which affects the amount of ethanol produced. Ethanol will cool from 79.347 to 54.133 oC, and air will cool from 31.333 to 59.667 oC as the cold fluid. The calculation results show that both reviews exceed the design threshold of 0.007056 h.ft2.oF/Btu. These heat exchangers require maintenance and repair. These results differ from the pressure drop values on the air side and pipe section, which are 1.2.10-3 inH2O and 0.647 psia, respectively. Both values remain outside the allowable limits. The performance evaluation of process equipment in the separation unit was aided by field data. The review of the data was able to predict a plant shut-down. This action was able to effect a partial or total plant shut-down due to fouling and scale exceeding design data thresholds.