Publication Search

This study aims to apply integral calculus methods to calculate the volume and arc length of an ice cream cone design shaped like a flower petal. The cone design is modeled using a quadratic function derived from three reference points on the petal curve. Using the solid of revolution method around the y-axis, the calculated petal volume is 150.8 cm³, and the arc length is 7.14 cm. The results demonstrate that calculus-based modeling supports efficient material usage while enhancing aesthetic and functional aspects of packaging. This research highlights the connection between mathematical concepts and practical product design in the food industry

Grade A steel plates are commonly used in marine and offshore structures due to their high corrosion resistance. This study investigates the effect of bevel angle variations (30°, 40°, and 50°) and the use of ceramic backing on the mechanical properties and welding defects of Grade A steel using the Shielded Metal Arc Welding (SMAW) method. Welding was conducted with four-pass multipass welding. An experimental approach was employed, including macro visual inspection, dye penetrant, tensile, and impact testing. Results showed that specimens without ceramic backing (P1) had more defects such as incomplete penetration and spatter compared to those with backing (P2). All specimens met ASTM E23 impact standards (average 23.9–24.1 J/mm²). Tensile tests revealed that ceramic backing improved strength, with the highest UTS (576.1 MPa) and elongation (25%) found.

Islamic civilization has played an important role in world history, with significant contributions in the fields of science, philosophy, architecture, and culture. Therefore, it is important to study and understand the history of Islamic civilization to understand its significant influence in the modern world. The Abbasid Dynasty was one of the golden periods in the history of Islamic civilization, with significant contributions in various fields. The Abbasid Dynasty was one of the dynasties that had a high civilization in the field of science, of course this was inseparable from the efforts made by the caliphs who led the government. Efforts continued to be made by translating foreign works that had previously experienced civilization in the fields of science and other fields. This article will discuss the history of the Abbasid Dynasty and its contributions to Islamic civilization.

Indonesia is an archipelagic country rich in ethnic, cultural, religious, and belief diversity. The Indonesian Constitution guarantees freedom of religion and belief, yet adherents of traditional beliefs often face discrimination, particularly in marriage registration. This study aims to evaluate and reconstruct the marriage registration system for adherents of traditional beliefs based on Pancasila's social justice principles. The study employs various theories, including the theory of equal freedom of belief, affirmative action, the legal duty to collect what is scattered, and the principle of iustitia socialis. The findings indicate that the integration of marriage registration institutions, simplification of the registration process, training for registration officers, revision of inclusive regulations, and increased public awareness are crucial to overcoming discrimination and ensuring social justice. The implementation of this reconstruction is expected to provide legal certainty and protection of the rights of traditional belief adherents, reflect Pancasila values, and create a more just and inclusive society.

Along with the development of technology and the increasing need for speed and ease of access to information, electronic archives have developed into Dynamic Archiving Information Systems (SIKD). Not only functioning as a storage medium, SIKD is also used as an archive management tool that allows organizations to organize, access, and monitor documents more efficiently and in real-time, to support the creation of a more modern work process. This study was conducted at the Head Office of Perum BULOG with the aim of analyzing the effectiveness of SIKD in archive management, identifying obstacles to its implementation, and formulating efforts to increase personnel awareness of the use of SIKD. This study uses a qualitative method using a research method that focuses on direct observation of phenomena or events that occur in real life, and uses a data analysis model with the help of NVivo 12 Plus software. The units of analysis in this study are sub-division heads, managers, and employees who are active users of the Dynamic Archiving Information System (SIKD). Data were obtained directly from the original source using interview, observation, and documentation techniques, and supplemented with literature studies as additional sources of information. Based on the research results, it shows that the implementation of SIKD increases work efficiency, accelerates the flow of correspondence, and digitizes archives. However, the implementation of this system still faces challenges such as low employee awareness in using this system, technical constraints, and operational constraints.

Medan is one of the metropolitan cities that has many offices, schools and colleges, this has resulted in most residents of Medan City being required to sit continuously and be less mobile in working and studying. Sport is one activity that can be done to overcome this. Therefore it is necessary to build a recreational sports arena in the city of Medan which can be used every day according to the user's schedule and which can accommodate activities or matches held by certain communities or parties. This sports arena was designed with a metaphorical architectural approach, to show an attractive building visual and increase the interest of the people of Medan City to exercise in this building.      

Aspect-based sentiment Analysis (ABSA) is vital in capturing customer opinions on specific e-commerce products and service attributes. This study proposes a hybrid deep learning model integrating Bi-Directional Gated Recurrent Units (BiGRU) and Bi-Directional Attention Flow (BiDAF) to perform aspect-level sentiment classification. BiGRU captures sequential dependencies, while BiDAF enhances attention by focusing on sentiment-relevant segments. The model is trained on an Amazon review dataset with preprocessing steps, including emoji handling, slang normalization, and lemmatization. It achieves a peak training accuracy of 99.78% at epoch 138 with early stopping. The model delivers a strong performance on the Amazon test set across four key aspects: price, quality, service, and delivery, with F1 scores ranging from 0.90 to 0.92. The model was also evaluated on the SemEval 2014 ABSA dataset to assess generalizability. Results on the restaurant domain achieved an F1-score of 88.78% and 83.66% on the laptop domain, outperforming several state-of-the-art baselines. These findings confirm the effectiveness of the BiGRU-BiDAF architecture in modeling aspect-specific sentiment across diverse domains.

The need for an efficient system to manage academic works in digital format is growing in universities, including at Universitas Islam Negeri Sumatera Utara (UINSU). Despite previous developments in digital repository systems, many academic institutions, including UINSU, still face challenges related to data management, security, and accessibility. This study aims to develop a web-based repository system for UINSU using the Waterfall method, to improve the storage, management, and accessibility of academic resources. A structured quantitative approach was adopted, focusing on the development and implementation of the repository system. The Waterfall methodology was chosen due to its step-by-step approach, ensuring a thorough and organized development process. The implementation of the system resulted in an organized, user-friendly platform where students, faculty, and staff can upload, manage, and access academic documents efficiently. The system features a clear interface for searching, uploading, and managing documents, with administrative controls for approving and maintaining submissions. The repository system significantly improves data management at UINSU, providing a long-term solution for archiving academic work. Continuous evaluation and system upgrades are essential to ensure it adapts to future needs and technological advancements.

The orientation of educational institutions is busy with exam scores, and academic grades are the main prerequisites for graduation. As a result, the product produced by students is how high the report card score is and discredits the values of character, life and morality. This causes students to lose focus on character education. For this reason, teachers as the main milestone in learning in the classroom are required to create a learning atmosphere with character based on DOOR (Diversity, Optimism, Option for The Poor, Respect). This is because the character based on DOOR is a guideline in the ministry at the Bethlehem Bandar Baru Foundation. The objectives of the study are: (1) To describe the management model of character education training based on DOOR; (2) Determine the feasibility of the character education training management model based on DOOR; and (3) Determine the effectiveness of the implementation of character education training management based on DOOR at the Bethlehem Bandar Baru Foundation. The research uses a research and development approach to develop a model to improve teacher performance at the Betlehem Bandar Baru Foundation. The research sample is 59 teachers at the Bethlehem Bandar Baru Foundation. The results of the study show: (1) The training model developed is feasible to be used in an effort to improve the performance of teachers of the Bethlehem Bandar Baru Foundation, through the following stages: planning, organizing, moving, and supervising; (2) The training model is effectively used to improve the performance of teachers of the Betlehem Bandar Baru Foundation. There was an increase in teacher performance in the following aspects: learning planning by 42.05%; the implementation of learning is 29.74%; and assessed learning outcomes by 59.49%; and (3) a character training model developed practically for improving teacher performance at the Bethlehem Bandar Baru Foundation, obtained N-Gain Score g = 0.76 > 0.7 (small group trial) and g = 0.79 > 0.7 (limited wide trial); The resulting products were 76.40% (small group trials) and 79.08% (limited wide trials) with the effective category. Based on the results of the study, it is suggested that the improvement of teacher performance at the Bethlehem Bandar Baru Foundation must be carried out with integrated planning, organization, implementation and supervision between the Archdiocesan Foundation, the Foundation's internal supervisors, principals, and teachers.  

This study discusses the management of electronic archives across various institutions, focusing on effectiveness, efficiency, and its impact on employee performance. The study examines different strategies for optimizing digital archiving systems, including the implementation of correspondence management applications and relevant policies adopted by both the government and the private sector. Using a quantitative approach, this research is analyzed through statistical methods. The findings indicate that the implementation of digital archiving systems can improve work efficiency, reduce the risk of document loss, and accelerate access to information. However, challenges such as limited technological infrastructure, lack of employee training, and data security issues remain major obstacles to the successful implementation of these systems. Therefore, more comprehensive policies and ongoing training are needed to ensure the sustainability of effective and secure electronic archive management.

The documentary film "Museum Perkebunan Indonesia" by Fabio Fahrezi Canavaro uses the expository technique to present the history of plantations in Indonesia in a factual and educational manner. This technique emphasizes the clear delivery of information through authoritative narration, visual archives, and expert interviews, providing the audience with a deeper understanding. The documentary is structured in a chronological narrative, starting with the early history of plantations during the colonial era, the post-independence developments, and the relevance of plantations in the modern era. Observations of the film reveal the use of visual archives, such as old plantation photos, historical documents, and colonial maps, as well as interviews with historians and plantation practitioners, enriching the narrative. The combination of clear verbal narration and visual evidence strengthens the presented information, making it easier to comprehend. The expository technique successfully changes the perception of plantation history, which was previously considered monotonous, into something more engaging and relevant. This documentary not only serves as a medium for historical education but also provides a fresh perspective on the role of plantations as a key pillar of Indonesia’s economy. Through this approach, the film serves as an effective example of expository technique in historical documentary filmmaking in Indonesia, encouraging the audience to explore often-overlooked history.

The Medan city is one of the largest cities in Indonesia with many economic and tourist activities. The Medan city is one of the gateways for Indonesian businessmen and tourists, especially in North Sumatra. This requires an accommodation that can be a lodging solution for business people and tourists who are doing temporary interests in the city of Medan. This has the potential to design a hotel as a temporary lodging solution for business people and tourists in the city of Medan. The hotel design uses problem solving methods that are focused on solving existing problems, starting from the formulation stage, data collection, analysis to synthesis using survey techniques, literature studies and comparative studies. So that through the design of this hotel, it can be the right lodging solution in the city of Medan with a Tropical Architecture approach that is able to provide comfort for users. Hotel design pays attention to the availability of infrastructure and utilities to support human needs in a design that is able to adapt to the surrounding environment.

Since the time of the archipelago, Acehnese culture has maintained a rich and intricate cultural legacy. Due to its advantageous position and status as a commerce route, Acehnese culture was influenced by the cultures of many of the traders that passed through. The purpose of this study is to learn about Acehnese culture from a social and physical standpoint. The information gained from this study's findings will undergo qualitative analysis. With the help of interview rules, this data collecting method is conducted by asking informants questions directly and verbally (face-to-face). In order to generate qualitative data, researchers perform qualitative analysis by giving a detailed and understandable explanation of the problem information. Based on the outcomes of interviews conducted by researchers, the Acehnese tribal community has similarities between physical and social behavior that are still applied in everyday life which are usually presented at traditional events, religious celebrations and cultural celebrations and the Acehnese tribal community is also famous for its traditional traditions and strong religion and highly upheld norms that are still applied in everyday life. These norms include Islamic religious norms, legal norms originating from the Islamic Religion and the 1945 Constitution, politeness norms in dressing in accordance with Islamic teachings, moral norms that closely related to Islamic teachings, and social norms such as courtesy, mutual respect, mutual cooperation and mutual assistance. In this research, it can be concluded that the Acehnese people who live around Medan Tembung sub-district, Medan city, actually still adhere to several norms which are an integral part of their identity and daily life. And also has customs. Social practices and traditions that have been maintained for generations by the Acehnese people reflect the richness of their culture and spirituality. And the Acehnese language not only functions as a means of communication, but also as a symbol of regional identity and pride for the Acehnese people

The purpose of this study is to analyze the distribution and condition of historical heritage, which symbolizes the identity of Malay culture in the Medan Maimun area. This study uses a case study approach for its qualitative method. Information is obtained through direct observation at the location, intensive interviews with local residents and site managers, and review of historical archive documents. The findings show that although the Maimun Palace, the Grand Mosque, and Sri Deli Park have a high level of culture, there are elements of modernization, lack of structural problems, and inadequate maintenance, which cause great difficulties in preserving these heritages. Therefore, there is a need for the government, community, and academics to work together in determining the best conservation strategy.  

The archiving of case documents that have obtained permanent legal force (inkracht) at the State Administrative Court (PTUN) of Banjarmasin is a crucial aspect of judicial administration, serving to maintain the accuracy of legal documentation while supporting transparency and accountability within the judicial system. This process includes the recording, storage, and disposal of documents in accordance with applicable regulations, as stipulated by the Supreme Court and national archival regulations. From the perspective of Public Administration Theory, archival management must be conducted systematically and based on regulations to enhance the efficiency and effectiveness of judicial services. Meanwhile, according to the Theory of Judicial Transparency and Accountability, information openness in archival management plays a significant role in building public trust in the judiciary. Although PTUN Banjarmasin has implemented an archiving system that complies with established standards, challenges in the digitalization of archives remain an obstacle, particularly in terms of technology optimization and human resource readiness. Therefore, strengthening digital-based archival systems and enhancing judicial administrative capacity are strategic measures to improve document management efficiency, reduce the risk of loss or damage to physical archives, and reinforce judicial transparency and accountability.

In the era of Digital Society 5.0, the development of information and communication technology has had a significant impact on daily life, including in the field of education. Christian education has become an important component in the character formation of adolescents, particularly within the youth fellowship of the Evangelical Protestant Church in the Archipelago (GPIN) Bukit Asam. Parents play a central role in teaching religious values to their children, which will shape their character and morality amid the challenges of the digital era. This research will discuss how parents teach and implement Christian education for the character formation of adolescents at GPIN Bukit Asam, as well as the challenges and strategies faced in the digital context. The findings of this study contribute to understanding the role of parents in applying Christian education for the character formation of GPIN Bukit Asam adolescents in the 5.0 era.

Indonesia as the largest archipelagic country has significant fisheries potential, one of which is through the Nizam Zachman Ocean Fishing Port (PPS) in Jakarta. This port is a central hub for fish landing and distribution in the DKI Jakarta area and its surroundings, particularly with the use of purse seine fishing gear. This study aims to analyze the composition of fish catches using purse seine at the Nizam Zachman Ocean Fishing Port and identify the species caught.  The research method includes direct observation of the catch, documentation, and weighing of each fish species. Primary data is obtained from field observations, while secondary data is gathered from relevant literature. Composition analysis is carried out by calculating the percentage of each fish species relative to the total catch, using the formula Kj = (Ni/N) x 100%. During the study, with a sample of 67 vessels, 31 fish species were recorded, with dominant species including skipjack tuna (Katsuwonus pelamis) at 55.42%, scads (Decapterus spp.) at 14.11%, bigeye tuna (Thunnus obesus) at 13.55%, and yellowfin tuna (Thunnus albacares) at 10.33%. The variation in catches was influenced by fishing season, fishing location, vessel size and operational duration, fishing technology and equipment, and weather conditions.

Whe.n it come.s to kids, ARI can stop the.m from le.arning ne.w things, and to le.arn ne.w things, you ne.e.d e.ffe.ctive. ways to le.arn. The. goal of this study is to find out how animate.d vide.o me.dia affe.ct what e.le.me.ntary school kids in Se.marang know about the. IRA. The. re.se.arch me.thod use.d was quantitative., with a quasi-e.xpe.rime.ntal de.sign and a control group that wasn't the. same.. All of the. stude.nts at SDN Bange.tayu We.tan 02 are. part of the. study's population. Te.e.nage.rs de. 10 años a 12 años forman parte. de. la inve.stigación. E.l núme.ro de. e.studiante.s e.s de. 38, y fue. e.le.ccionada utilizando la técnica de. mue.stre.o inte.ncionado. It was a knowle.dge.-base.d que.stionaire. that was use.d as a tool in this study. The. te.aching me.thod use.d with animate.d movie.s and Powe.rPoint. For paire.d data, the. Wilcoxon te.st was use.d, and the. U-te.st from Mann-Whitne.y was use.d to se.e. if the.re. was a diffe.re.nce. in the. point score.s be.twe.e.n the. inte.rve.ntion group and the. control group. The. study's re.sults show that the. Wilcoxon te.st adde.d a value. (p = 0.000) to the. group that re.ce.ive.d the. inte.rve.ntion, but not to the. group that re.ce.ive.d the. control. This me.ans that both groups, the. inte.rve.ntion and control, le.arne.d more.. The. Mann-Whitne.y te.st also showe.d a significant diffe.re.nce. be.twe.e.n the. inte.rve.ntion and control groups, with a value. of (p = 0.000). If you want to improve. your knowle.dge., e.ducational films with animations are. a be.tte.r way to do it than Powe.rPoint pre.se.ntations.    

Waropen Regency, located in Papua Province, Indonesia, is an area with abundant natural resource potential, such as fisheries (fish, shrimp, crabs), tropical forests and biodiversity. However, the varied topography, high rainfall and geographical conditions make this region vulnerable to flood disasters. This research aims to analyze and predict flood hazards in Waropen Regency using Geographic Information Systems (GIS) such as ArcGIS. The methods used include secondary data collection (topography, rainfall, land use, and river network), data processing using GIS software, as well as spatial analysis using Digital Elevation Models (DEM) and hydrological modeling. The research results produced a flood hazard zoning map that identifies priority areas based on threat level. This map is also used to analyze the potential impact of flooding on settlements, infrastructure and agricultural land. The findings of this research provide important information for local governments and stakeholders in designing disaster risk mitigation strategies, such as building flood control infrastructure and disaster mitigation-based spatial planning. Thus, this research shows the potential of GIS in supporting effective and data-based disaster risk management in Waropen Regency.

This qualitative literature review explores the role of institutional, societal, and leadership forces in shaping organizational transparency. By analyzing existing literature, the study identifies how these forces interact to form five archetypal transparency regimes: vanguard, pioneering, hollow, deceptive, and paradoxical. Institutional forces, through regulations and governance norms, provide a framework for transparency. Societal forces, driven by stakeholder pressure, motivate organizations to meet public expectations. Leadership forces contribute by fostering a culture of openness. The study highlights the complex interplay of these forces and offers insights into strategies for enhancing transparency. Despite its contributions, the study acknowledges limitations related to interpretative bias and the generalizability of findings across different contexts. Future research is recommended to empirically test these insights and explore diverse industrial and geographical settings.