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Ratu Humayroh Aldora; Ramdani Bayu Putra; Dodi Suryadi; Hasmaynelis Fitri

Manajemen Kreatif Jurnal (MAKREJU) 2025 Pusat Riset dan Inovasi Nasional

This research aims to find out how much influence work motivation and work discipline have on employee performance with job satisfaction as an intervening variable at the West Sumatra Population and Civil Registration Service. Documentation methods and types of primary data.. Research results obtained based on partial tests (T tests) obtained: There is a significant positive influence between work motivation and job satisfaction at the West Sumatra Population and Civil Registration Service. With an influence of 0.007. There is an insignificant positive influence between Work Discipline on Job Satisfaction at the West Sumatra Population and Civil Registration Service. With an influence of 0.612. There is an insignificant positive influence between work motivation on employee performance at the West Sumatra Population and Civil Registration Service. With an influence of 0.188. There is an insignificant negative influence between Work Discipline on Employee Performance at the West Sumatra Population and Civil Registration Service. With an influence of 0.101. There is a significant positive influence between Job Satisfaction on Employee Performance at the West Sumatra Population and Civil Registration Service. With an influence of 0,000. There is an insignificant positive influence on Job Satisfaction mediating Work Motivation on Employee Performance at the West Sumatra Population and Civil Registration Service. With an influence of 0.040. There is an insignificant positive influence on Job Satisfaction mediating Work Discipline on Employee Performance at the West Sumatra Population and Civil Registration Service. With an influence of 0.587.    

Taufik Muhammad; Achmad Kusyairi; Alif Astagia

Mikroba : Jurnal Ilmu Tanaman, Sains Dan Teknologi Pertanian 2025 Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

This research aims to determine and inform the composition of the results catch (type and quantity) from gillnet fishing gear found in Muara Angke Fishing Harbor. The research was carried out for 3 (two) months starting from October to December at the Muara Angke Fishing Harbor. Data collection was carried out using survey methods and interviews and literature studies. Sampling was carried out using a purposive method sampling based on the function and benefits of the gillnet fishing unit. The number of respondents used in this research was 25 Gill Net vessels in the period October to December 2024 at the Muara Angke Fishing Port. Analysis of the type and number of catches was carried out descriptively. Research result shows that the composition of fish caught using Gill Nets in Muara Angke Fishing Harbor has 19 species of fish caught, with the most commonly caught fish being Gray Tuna with 329,710 kg and the least being Hammerhead Shark with 6 kg.

Arifin Yusuf Permana; Ifani Hariyanti

Intellektika : Jurnal Ilmiah Mahasiswa 2025 STIKes Ibnu Sina Ajibarang

Indonesia is the world's leading producer of spices, but it still faces challenges in manual visual quality assessment, which is inconsistent. This study aims to develop a spice quality classification system using a Deep Learning approach based on Convolutional Neural Networks (CNN). Data was collected through digital images of five types of spices (cloves, cardamom, cinnamon, pepper, and nutmeg) classified into two categories: good and bad. The dataset was then processed and used to Train the CNN model using Tensorflow. The model architecture consists of several convolution, pooling, and dense layers, and is integrated into a web-based prototype application using Streamlit. Evaluation results show that the model achieves high Accuracy of 98.86% (Training), 98.45% (Validation), and 98.45% (Testing). The prototype application can provide automatic Predictions of spice quality through a simple and responsive interface. The results of this study indicate that CNN is effective in identifying the visual quality of spices and can serve as an objective, efficient technological solution that supports the enhancement of Indonesia's spice export competitiveness.

Yahya Tanjung

International Journal of Management Research and Economics 2025 Institut Teknologi dan Bisnis (ITB) Semarang

This study aims to determine and analyze the influence of intrinsic and extrinsic factors on the behavior of housing purchase decisions in the city of Medan. The type of research used in this research is associative research with a quantitative approach. The population in this study is housing consumers in the city of Medan, North Sumatra whose number cannot be determined/unlimited. The sampling method used a nonprobability sampling method with a purposive sampling technique, where the researcher collects information from the most complete and fulfills various information needs. And accidental sampling provides questionnaires directly/coincidentally to meet the respondents who are said to be appropriate and worthy of the existing research. with the zikmund formula so that the number of research samples was 96 respondents. Methods of data collection is done by means of questionnaires and interviews. The data analysis method used is multiple linear regression analysis. Results Based on the research obtained partially and simultaneously, it shows that intrinsic and extrinsic factors influence purchasing decision behavior in the city of Medan. The results of the coefficient of determination test obtained the Adjusted R square value of 0.768 (76.8%). This shows that the intrinsic and extrinsic factors are able to explain the behavior of purchasing decisions by 76.8%, while the remaining 23.2% is influenced by other variables not examined in this study.

Eriyanto Eriyanto; Moch. Aspihan; Iskim Luthfa

Jurnal Siti Rufaidah 2025 PPNI UNIMMAN

Background: Adolescence is a developmental stage filled with hope and happiness for both boys and girls. During this time, adolescents feel more independent and capable of doing things they could not do as children. Adolescence is characterized by independence, freedom, and physical and psychological changes. Therefore, adolescents require appropriate guidance and support. Premarital sexual behavior in adolescents is often driven by sexual desire, either with the opposite sex or the same sex, and occurs before a legal relationship as husband and wife. Lack of parental role, exposure to pornographic media, alcohol consumption behavior can be factors that influence risky sexual behavior in adolescents. Purpose: To find out the factors that influence sexual behavior in adolescents at Jayapura High School. Research Method: The research population was students at one of Jayapura High Schools determined by stratified random sampling so that 80 respondents were obtained, the research instrument was a structured questionnaire that had passed validity and reliability tests, the type of research was quantitative with a Cross Sectional approach. Data collection techniques used questionnaires on the Role of Parents, Exposure to Pornographic Media, Alcohol Consumption Behavior and Risky Sexual Behavior with a Population of 100 Students with Results: The results showed that there was no relationship between the role of parents p = 0.545 (p > 0.05), and exposure to pornographic media p = 0.971 (p > 0.05), on risky sexual behavior in Jayapura High School students. There is a significant relationship between alcohol consumption and risky sexual behavior in Jayapura high school students (p-value = 0.000 (p < 0.05)).

Alfaro Muhammad; Zubaedah Hehanussa; Josepina Mainase

Jurnal Kesehatan dan Kedokteran 2025 Lembaga Pengembangan Kinerja Dosen

Stunting is one of the growth disorders that occur in childhood under two years. Stunting events can be influenced by two factors, namely direct factors and indirect factors. Based on data from the Tual City Health Office, the number of stunting cases in Tual City was recorded in 2021 as many as 308 cases and 74 cases in North Dullah District. The purpose of this study is to find out the picture of risk factors for stunting events in children aged 9-24 months in the puskesmas work area in North Dullah District of Tual City for the period 2021. This research is quantitative research, a type of observational descriptive research with a cross sectional design. The sample in this study was children aged 9 months to 24 months who experienced stunting and domiciled in North Dullah District for the 2021 period as many as 71 children and then given questionnaires to be filled out.  The data obtained is presented in the form of a table accompanied by explanations and arranged and grouped according to the purpose of the research. The results showed that in the North Dullah Health Center of Tual City, as many as 71 children aged 9-24 years experienced stunting, as many as 47 stunting children (66.2%) aged 9-24 months did not experience BBLR (not at risk), the sex of stunting children aged 9-24 months who were most found was male, namely as many as 47 children (66.2%), most children did not get exclusively breast milk, namely as many as 45 children (63.4%) and most children were immunized as many as 41.  children (57.7%). The most maternal education level is high school as many as 32 people (45.1%) and many parents' incomes are in the low category of 68 cases (95.8%).  

Rika Hanifah Tanjung; Muhammad Kurniawan; Afrini Yuninda Silitonga; Nisrina Ardra Hafizha; Nurlian Augustin Ningrum

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

Micro, Small, and Medium Enterprises (MSMEs) are strategic sectors in the Indonesian economy, but often face challenges in efficient and data-driven production management. This article highlights the urgency of the Real Work Lecture (KKN) program as a form of student service in assisting MSMEs, especially in optimizing the production of snacks typical of Tebing Syahbandar. This research aims to optimize the production output of the Untir-untir Titik Factory with an Integer Linear Programming (ILP) approach using the Branch and Bound algorithm. Primary data is obtained through interviews and production documentation, including product type, raw material needs, operational costs, selling prices, and profit margins. The initial analysis was carried out using the simplex method using POM QM software to obtain a linear solution, which was then refined with the Branch and Bound algorithm so that the results were in the form of integers. The results of the study showed that the optimal solution was achieved by producing 25 bales of kolong-kounder and not producing other types of snacks, resulting in a profit of Rp1,650,000 per day. These findings show that the ILP approach with Branch and Bound is able to significantly increase the efficiency and profitability of MSMEs. In addition, this method can be used as a basis for quantitative-based production decision-making. This research also emphasizes the strategic role of KKN in technology transfer and real solution-based assistance for MSME actors in the region, thereby supporting the sustainable strengthening of the local economy.

Nunung Futrianti; Lahmuddin Zuhri; Hanuring Ayu

Journal of Civil Criminal Law 2025 International Forum of Researchers and Lecturers

The right to health services for residents of Senawang Village and evaluating the legal protection mechanisms that can be taken by residents of Senawang Village due to the lack of health services, the type of research used is empirical legal research. The approach method used is a sociological approach and a legislative approach, the type of data is primary data, secondary data and tertiary data. While the data collection techniques are in the form of interviews, literature, and documentation. Finally, with the analysis of the data obtained from this study, it can be concluded that the fulfillment of the right to a healthy life is a basic right that must be guaranteed, because health is part of the primary needs of every human being, which is clearly regulated in Article 28 H paragraph (1) of the 1945 Constitution and Law of the Republic of Indonesia Number 17 of 2023. However, the reality in the field shows that the implementation and implementation of these various policies is still far from expectations. This shows a gap between the ideal regulations on paper and their implementation in real life. Therefore, synergy between infrastructure policies and health services is crucial because without concrete improvements in the infrastructure sector, the goal of realizing equitable, fair, and high-quality access to health services for all Indonesians will be difficult to achieve.

Daniel Edward Hernando Situmorang; Muhammad Arif Sahlepi; Ismaidar Ismaidar

Discourse on Law and Society 2025 International Forum of Researchers and Lecturers

Lobster is one of Indonesia's marine resources that has high economic value and is very important for the country's economy, but excessive lobster fishing and smuggling of lobster seeds have caused a decrease in the productivity of marine resources and significant state losses, so effective law enforcement efforts are needed to protect Indonesia's marine resources from these illegal acts. The problem in this study is how the law enforcement by the West Tanjung Jabung Police against the crime of smuggling lobster seeds (Study of Case Register Decision Number: 144 / Pid.Sus / 2023 / Pn Klt), and what factors are the causes. The research method used is normative juridical, a type of legal research that focuses on the analysis and interpretation of legal norms that apply in a legal system. The study shows that the three defendants in the crime of smuggling lobster seeds were sentenced to 2 years in prison and a fine of IDR 5,000,000 based on Article 27 number 26 Article 92 of Law Number 6 of 2023 concerning Job Creation. The factors causing this crime include internal factors (economic and education) and external factors (politics, environment, and lack of security). Suggestions from the study are: Reviewing the lobster seed export policy. Improving coordination between law enforcement officers and community participation. Improving the capacity and competence of law enforcement personnel.

Rusdiana, Ida; Kamsul Kamsul; Intan Kumalasari

Jurnal Inovasi Riset Ilmu Kesehatan 2025 Pusat Riset dan Inovasi Nasional

Clean water is a basic human need to achieve a healthy standard of living. Human survival is greatly influenced by the quality of water and the availability of water in sufficient quantities. In Keramasan Village, there are still many people who have bad habits in providing clean water. People use the river as a place to bathe, wash clothes, wash dishes and throw away garbage.The level of knowledge, attitudes and actions of the community regarding the provision of clean water in Keramasan Village, Kertapati District, Palembang City.This type of research is descriptive research with a cross-sectional design. The population in this study were 159 families living in RT 11 and RT 12 in Keramasan Village. The total sample of respondents in this study was 67 families. Sampling was carried out using a random sampling technique, which aims to ensure that the sample can represent all families.From the results of the study on the provision of clean water, the level of knowledge of 46.3% of respondents had a low level of knowledge, in contrast to the attitude of 67.1% of respondents showing a good attitude. and 59.7% of respondents have poor actions regarding the provision of clean water.From the results obtained, it can be concluded that the community in Keramasan sub-district regarding the provision of clean water, at the level of knowledge, most respondents still have a low level of knowledge, most respondents already have attitudes in the good category, and most people have actions in the bad category.

Cindy Claudia Tungga; Kristina Salestin Due Rema; Maria Seviana Ririn; Helena Kamila Kolo; Gaspar Hendrikus Wawo Aja +2 more

Jurnal Hasil Kegiatan Bersama Masyarakat 2025 Asosiasi Riset Ekonomi dan Akuntansi Indonesia

This socialization aims to provide benefits to the community of the importance of social media as social media as information media and media as marketing media to be able to develop and introduce tourism, typical meaning, and potential in the village of Tewaowutung itself. In the community service activities carried out in Teawaowutung Village, the socialization process was carried out in two stages, namely material presentation and discussion which was attended by weaving, culinary, chicken, and pokdarwis UMKM groups. From the results of socialization with material on the understanding of digital literacy, digital media strategies, types of social media, social media as information media, social media as marketing media. Can provide benefits and advantages to the community from promotion through social media. The speaker also made a tik tok for the village so that it could become a promotional media for Tewaowutung village, to introduce tourism in the village and become a product produced by MSMEs in Tewaowutung village.

Rizky Ilhami

Journal of Administrative and Sosial Science (JASS) 2025 Sekolah Tinggi Ilmu Administrasi (STIA) Yappi Makassar

Urban public issues are highly complex and involve various actors with different interests and resources. As a large city, Bandung faces a variety of public issues that require a collaborative policy approach. This study aims to analyze the policy network structure in handling public issues in Bandung. This study uses a qualitative approach with a descriptive-analytical research type. Data were collected through in-depth interviews, observations, and documentation studies, then analyzed using a policy network structure perspective. The results show that the policy network structure in Bandung is still dominated by government actors and tends to be hierarchical and fragmented. Inter-actor connectivity is not yet optimal, the participation of non-government actors is still limited, and the distribution of roles in the policy network is not yet balanced. This condition has an impact on weak cross-sector coordination, low community participation, and ineffective handling of public issues. This study concludes that the structuring of an inclusive, connected, and trust-based policy network is key to improving the effectiveness of public issue handling in Bandung City.

Nofri Y Naihati; Ida Bagus Anggapurana Pidada

Kajian ilmu Hukum, Sosial dan Administrasi Negara 2025 Lembaga Pengembangan Kinerja Dosen

Tourism is one of the most important economic sectors in the world, contributing significantly to state revenue and improving people's welfare. The tourism industry has grown rapidly in recent decades, with the number of international tourists continuing to increase. The general objective of this study is to develop a deeper knowledge and understanding of the impact of uncontrolled tourism on the sacredness of Bali's nature and culture, as well as strategies for developing sustainable tourism in Bali. The type of research used by the author in examining the problems in this study is normative juridical research. The conclusion of this study is a legal review of the protection of natural and cultural heritage in Bali Province is regulated in several laws and regulations such as Law No. 5 of 1990 concerning the Conservation of Biological Natural Resources and Ecosystems. In addition, cultural protection in Bali has also been regulated in several laws and regulations such as Law No. 11 of 2010 concerning Cultural Heritage. This legal review will also discuss the implementation of laws and regulations related to the protection of natural and cultural heritage in Bali. The Bali provincial government's policy on the protection of natural and cultural heritage, namely the policy on the protection of natural heritage is regulated in the Governor's Regulation or Pergub No. These include Law No. 97 of 2018 concerning the Limitation of Single-Use Plastic Waste, Governor Regulation No. 45 of 2019 concerning Bali Clean Energy, Governor Regulation No. 48 of 2019 concerning the Use of Battery-Based Electric Motorized Vehicles, and Governor Regulation No. 8 of 2019 concerning Organic Farming Systems. Cultural heritage protection policies are regulated by Law No. 10 of 2010 concerning Tourism, Regional Regulation No. 2 of 2023 concerning the Bali Provincial Spatial Plan (RTRWP), the Designation of Cultural Heritage Areas in Bali, such as Ulun Danu Batur Temple and Lake Batur, the Subak Cultural Landscape and Temples in the Pakerisan Watershed, and others.

Fitriyani Handayani; Widayati, Widayati

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

The phenomenon of low numerical ability and persistent obstacles to student learning outcomes. The objectives of this study are: (1) To determine the influence of the level of numerical ability of seventh-grade students at SMP Negeri 10 Yogyakarta, (2) To determine the influence of the magnitude of the mathematics learning outcomes of seventh-grade students at SMP Negeri 10 Yogyakarta, and (3) To find the influence of numerical ability on the learning outcomes of seventh-grade students at SMP Negeri 10 Yogyakarta. This type of research is quantitative correlational. The subjects of this study were seventh-grade students, whose numerical ability and mathematics learning outcomes were the objects of this research. Data collection methods used were a numerical ability test and a mathematics learning outcome test on the topic of social arithmetic. The research instruments used were essay-style numerical ability worksheets and multiple-choice social arithmetic worksheets. Data analysis methods used prerequisite tests (linearity test, normality test, and homogeneity test) and simple linear regression analysis.This study yielded the following findings: (1) The overall level of numerical ability of students in class VIII D of SMP Negeri 10 Yogyakarta is in the moderate category, (2) The level of mathematics learning outcomes for the topic of arithmetic of students in class VII D of SMP Negeri 10 Yogyakarta is in the moderate category, and (3) There is a positive and significant influence between numerical ability and students' mathematics learning outcomes. This is evidenced by the correlation coefficient value of 0.845 and the coefficient of determination (R square) which shows that numerical ability contributes 71.4% to students' mathematics learning outcomes.

Diah Ayu Fitrianingsih; Zaenul Muttaqien; Diana Ambarwati

Nian Tana Sikka : Jurnal ilmiah Mahasiswa 2025 Fakultas Ekonomi & Bisnis, Universitas Nusa Nipa

This study aims to determine the effect of Customer Intimacy, Price Fairness, and Customer Bonding on Customer Loyalty at Reni Salon Tales Ngadiluwih. The selection of the research location is based on the consideration that Reni Salon is a beauty service business that has regular customers, but the level of customer loyalty cannot be measured precisely. The type of research used is quantitative research with an unknown population. The research sample amounted to 105 respondents who were determined by purposive sampling technique, namely the selection of samples based on certain criteria relevant to the research. The analysis techniques used include data quality testing, classical assumption testing, and multiple linear regression analysis with the help of Statistical Product and Service Solution (SPSS) version 25. This analysis is used to determine the influence of both partial and simultaneous between independent variables on the dependent variable. The results of the study indicate that partially, Customer Intimacy does not have a significant influence on Customer Loyalty. This indicates that personal closeness between the salon and customers is not yet a major factor in forming loyalty. Meanwhile, Price Fairness has a significant influence on Customer Loyalty, meaning that prices that are considered fair and appropriate by customers can increase their loyalty. Customer Bonding also had no significant effect on Customer Loyalty, indicating that emotional bonds or close customer relationships do not yet play a significant role. However, simultaneous test results show that all three variables—Customer Intimacy, Price Fairness, and Customer Bonding—jointly have a significant effect on Customer Loyalty. These findings suggest that price fairness plays the most critical role in enhancing customer loyalty compared to other factors. Therefore, Reni Salon management is advised to focus more on fair pricing strategies, along with efforts to strengthen closeness and bonds with customers.

Arya Prawira Kusuma; Anak Agung Sagung Shanti Sari Dewi; I Gusti Ayu Gde Sosiowati

Jurnal Riset Rumpun Ilmu Bahasa 2025 Pusat riset dan Inovasi Nasional

This study aims to explore expressive illocutionary acts in the film The Perks of Being a Wallflower, focusing on the types and functions that appear in the interactions between the characters. Expressive illocutionary acts, as part of pragmatic studies, play an important role in representing emotions, attitudes, and social relationships between speakers. This study was conducted to identify in detail twelve types of expressive illocutionary acts and their four accompanying functions, thereby providing a deeper understanding of the dynamics of communication in the film. This study uses a qualitative approach with documentation and observation methods of the film's dialogue. Data analysis was carried out through three stages: data reduction, data presentation, and conclusion drawing, to obtain a systematic picture of the pattern of expressive illocutionary acts. The results show that all twelve types of expressive illocutionary acts are found in the film, with the expression "thank you" as the most dominant form. This reflects the film's main theme, which emphasizes the value of friendship, emotional support, and gratitude between characters. In contrast, the expression "regret" is the least used type. 

Desak Kadek Vitri Dwi Yani; I Made Rajeg; Ni Made Ayu Widiastuti

Jurnal Riset Rumpun Ilmu Bahasa 2025 Pusat riset dan Inovasi Nasional

This study explores the metaphor of life in Colleen Hoover’s novel Reminders of Him, aiming to identify the types of linguistic metaphors and analyze the conceptual metaphors that underlie them. Based on Lakoff and Johnson’s conceptual metaphor theory, which classifies metaphors into structural, ontological, and orientational categories, this study highlights the role of metaphor as a cognitive tool, not merely a stylistic device. A qualitative method was employed, with data collected using AntConc software by focusing on parts of the novel containing the word “life.” The Metaphor Identification Procedure was applied to identify linguistic metaphors, which were then categorized based on the word class of the lexical units that were used metaphorically. The results of this study show four types of linguistic metaphors involving the noun “life”: nominal, verbal, adjectival, and prepositional. These forms portray life as a physical object, a process, a possessed attribute, or a container. These linguistic metaphors reflect eight conceptual metaphors, including five ontological metaphors (life is ownership, life is a container, life is an entity, life is air, life is a place) and three structural metaphors (life is a machine, life is a journey, life is a challenge). The diversity of these conceptual metaphors illustrates the rich representation of life in the novel.  

Kosasih, Eva; Rusniati, Ni Wayan; Tari Tastrawati, Ni Ketut

Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa 2025 Asosiasi Riset Ilmu Matematika dan Sains Indonesia

This study aims to optimize the cake production profit at Cake by Cece using the Branch and Bound algorithm. The data used include raw material requirements per batch, daily raw material availability, and selling prices for three types of cakes: Cookies, Brownies, and Cinnamon Roll. The optimization model is formulated as an Integer Linear Programming problem with the objective of maximizing total daily profit. The model is solved using the simplex method followed by the Branch and Bound algorithm to obtain valid integer solutions. The results indicate that the optimal production combination is 2 batches of Cookies, 2 batches of Brownies, and 3 batches of Cinnamon Roll, yielding a maximum profit of IDR 233,000 per day. This solution satisfies all raw material constraints and is feasible for daily operational implementation. This study provides quantitative recommendations to support production decision-making in culinary sector MSMEs.

Selvia Maysaroh; Lasmi Dewi Nuraini

Jurnal Ilmu Kesehatan 2025 Lembaga Pengembangan Kinerja Dosen

Background: Half of the 75 million children in Indonesia suffer from dental caries, and the number continues to rise each year. Caries is a disease that involves the enamel, dentin, and pulp of the tooth. If left untreated, it can reach the pulp and cause tooth necrosis. Pulpectomy is a dental procedure that involves removing the entire pulp tissue of deciduous teeth to access the infected root canal. This procedure is crucial to prevent the spread of infection. Post-pulpectomy restoration is essential to ensure the optimal function of the tooth and prevent further damage to the remaining tooth structure. The restoration must have adequate retention, minimal leakage, and not increase the risk of further damage to the remaining tooth structure. Methodology: This study is a qualitative research in the form of a literature review using secondary data collected in August 2024 from five main databases: PubMed, MDPI, ScienceDirect, Garuda (Garba Rujukan Digital), and Taylor & Francis. The collected data were then sorted to identify articles relevant to the research criteria. Results and Discussion: Based on the Prisma Diagram Flow, 343 articles were identified from the five databases, which were then filtered down to five articles that met the criteria to be the primary articles in this literature review. The results show that there are various types of post-pulpectomy restorations tailored to the diagnosis and clinical indications of the treated teeth. Conclusion: There are two commonly used types of post-pulpectomy restorations, namely restorations made of Glass Ionomer Cement (GIC) and Stainless Steel Crowns (SSC). Both of these restorations can be modified into space maintainers, which are essential in preserving space for the future growth of permanent teeth while improving the function of the treated tooth.

Yohanes Kristianto; Asrori Asrori

Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2025 Asosiasi Riset Teknik Elektro dan Informatika Indonesia

This study aims to analyze the effect of variations in the Continuously Variable Transmission (CVT) spring constant and the type of fuel on the performance of a 110 CC gasoline motorcycle engine. The CVT system is one of the important components in an automatic motorcycle that functions to transmit power from the engine to the rear wheels efficiently. CVT performance is greatly influenced by the spring constant used, because this component is directly related to the automatic gear ratio shifting process. On the other hand, the type of fuel also has an important role because it is related to the quality of combustion and the efficiency of energy produced by the engine. The test results show that the use of a CVT spring with a constant of 18.05 N/cm combined with Pertamax fuel is able to provide the best engine performance. In this configuration, the engine reaches a maximum power of 7.84 HP at 8200 rpm and a maximum torque of 9.30 Nm at 6200 rpm. This combination is proven to be the most optimal in increasing power and torque, thus providing more responsive acceleration. Furthermore, the use of a CVT spring with a constant of 25.20 N/cm combined with Pertamax also shows quite good performance, namely with a maximum power of 7.38 HP and a maximum torque of 8.56 Nm. Although the results are not as high as the first configuration, this combination is still quite effective in improving engine performance. Meanwhile, when using a spring with a higher constant of 33.69 N/cm, the resulting power tends to decrease to 7.02 HP with a torque of 8.02 Nm. In addition, the initial acceleration in this configuration is less responsive so it is not recommended for optimal performance.