Abstract: This research systematically concentrates on the effect of different dyeing temperatures on the mechanical properties of AISI 1045 steel which has an important role in the field of mechanical engineering. These findings are important for the development of engineering components such as shafts and gears. This study aims to analyze the effect of quenching temperature variations on the hardness, tensile strength, and ductility of AISI 1045 steel experimentally. Heat treatment was carried out through samples up to an austenization temperature of 850°C with a holding duration of 30 minutes, followed by flash dipping (rapid cooling) using water media at temperature variations of 5°C, 15°C, 25°C, and 35°C. Each treatment was carried out five times and statistical analysis was given to obtain representative data. Observation of microstructures using serial light microscopy was carried out including evaluation. The results showed a close relationship between the decrease in coolant temperature and the increase in hardness and tensile strength. However, there is an opposite correlation with material durability. The highest hardness, 58 HRC, and the strongest tensile strength, 1250 MPa, were obtained for samples cooled at 5°C.  Microstructure observations show a more dominant martensite formation at cooler immersion temperatures. The results of this study provide insight into the correlation with the transformation of the mechanical and microarchitectural characteristics of AISI 1045 steel.
 

Toko Ahmad Adam adalah toko sembako yang menyediakan kebutuhan pokok seperti beras, minyak goreng, mie instan, dan gula. Pengelolaan stok yang masih dilakukan secara manual menyulitkan pemilik toko dalam menetapkan prioritas pengadaan barang. Ketiadaan sistem klasifikasi stok menyebabkan ketidakseimbangan antara kebutuhan dan ketersediaan barang, sehingga berisiko terjadi kekurangan atau kelebihan stok. Penelitian ini bertujuan membangun model klasifikasi stok guna mengoptimalkan pengelolaan persediaan. Metode yang digunakan adalah algoritma Naive Bayes dengan input berupa jumlah stok, frekuensi barang masuk, dan data kategori barang. Model klasifikasi ini menghasilkan pengelompokan barang ke dalam dua kategori, yaitu laku cepat dan kurang laku, berdasarkan kecepatan habisnya stok dalam periode waktu tertentu. Hasil klasifikasi digunakan sebagai dasar pengambilan keputusan pengadaan barang. Pendekatan ini mampu menyajikan informasi relevan untuk membantu pemilik toko dalam menentukan barang yang perlu segera diisi ulang maupun yang pengadaannya dapat ditunda, sehingga pengelolaan persediaan menjadi lebih efisien dan efektif.

Landslides are a frequent natural disaster in the Karanganyar area, especially in hilly areas with high rainfall and fragile geological conditions. This community service activity aims to provide technical assistance on gabion installation as a landslide mitigation effort in Dusun Sukuh, Ngargoyoso District, Karanganyar Regency. The method includes lectures, demonstrations, and direct practice, covering preparation stages, material selection, and correct installation techniques. The results showed a significant increase in participants' understanding, from an average pre-test score of 32% to 70% in the post-test. This indicates that the program effectively improved the knowledge and skills of the community regarding gabion installation techniques. The community showed active participation and high enthusiasm, reflecting their awareness of the importance of disaster mitigation efforts. This activity is expected to support the sustainability of community-based disaster risk reduction efforts in the region.

This study explores the transformative role of Artificial Intelligence (AI) in enhancing customer experience personalization (CEP) and optimizing marketing strategies (MSO) within digital marketing environments. Grounded in the Technology Acceptance Model (TAM), the research incorporates ethical and privacy concerns (EC) as moderating factors influencing AI adoption and its effectiveness. Using survey data from marketing professionals across diverse industries, the study employs Structural Equation Modeling (SEM) to analyze complex relationships among AI use, CEP, MSO, and marketing outcomes. The findings reveal that AI significantly improves customer engagement and marketing performance by enabling tailored interactions, data-driven segmentation, and campaign optimization. Moreover, ethical and privacy concerns positively moderate these effects, underscoring the necessity of responsible AI practices in sustaining consumer trust and regulatory compliance. By offering empirical insights into the interplay between AI, personalization, strategy, and ethics, this study contributes to both theoretical development and practical guidance for businesses navigating digital transformation. The research highlights AI’s strategic potential in creating sustainable competitive advantage while advocating for ethical safeguards in technology-driven marketing.

The Soerakarta Walking Tour (SWT) is an innovative urban tourism initiative that integrates cultural preservation, environmental sustainability, and inclusivity. This study examines how SWT's promotes green tourism through a mixed-methods approach, combining quantitative surveys and qualitative interviews with participants. The quantitative findings reveal high levels of participant satisfaction, including understanding green tourism principles and satisfaction with cultural storytelling. Qualitative data complement these results, highlighting participants’ appreciation for Muslim-friendly facilities, opportunities for cultural learning, and the promotion of local economic and environmental sustainability. The study applies the frameworks of Integrated Marketing Communication (IMC) and Social Marketing to analyze how SWT delivers consistent and engaging messages while fostering behavioral change. The findings show that SWT successfully inspires participants to adopt sustainable practices, though some variability in the visibility of green tourism principles suggests room for improvement.

This community service program aimed to explore and strengthen the role of local communities in preserving the natural tourism site known as "Pohon Sejuta Umat" in Banda District, Central Maluku. This site holds ecological, cultural, and spiritual value, making community involvement vital for its sustainability. The program employed participatory methods including observations, interviews, focus group discussions, and training workshops with community members, traditional leaders, and the local tourism awareness group (Pokdarwis). The findings reveal strong community commitment in conserving the area through regular clean-ups, informational signage based on local wisdom, and collaborative patrols. Capacity-building sessions enhanced community understanding of environmental conservation and introduced digital strategies to promote the site. This initiative underscores the importance of integrating local knowledge and participatory approaches in sustainable tourism development. Empowering local communities ensures that conservation efforts align with both environmental goals and socio-economic benefits.

The use of hormonal contraception is a common method used by women of childbearing age to prevent pregnancy. However, this method is often associated with side effects, one of which is spotting or light bleeding outside the menstrual cycle. This study aims to analyze the relationship between the type of hormonal contraception and the incidence of spotting in the Sonuo Village Health Center  area. This study used a quantitative design with a cross-sectional approach. The sample consisted of 37 respondents selected by total sampling. Data were collected through questionnaires and analyzed using the chi-square test with the help of SPSS software. The results showed that the majority of respondents used injectable contraception (62.2%), followed by implants (24.3%) and pills (13.5%). Most injectable users experienced spotting (82.6%), while implant users more often experienced amenorrhea (77.8%). The chi-square test showed a significant relationship between the type of hormonal contraception and the incidence of spotting (p-value = 0.000). The conclusion of this study is that the type of hormonal contraception affects the incidence of spotting, where injectables cause spotting more often than other methods. Education about the side effects of hormonal contraception needs to be increased so that users can choose a method that suits their body condition.

The rapid growth of e-commerce requires innovative solutions to enhance consumer engagement and overcome online shopping limitations. This research analyzes the impact of Augmented Reality (AR) technology on consumer purchase intentions in e-commerce through a quantitative approach involving 150
AR users. Using PLS-SEM analysis, this study examines the relationships between AR characteristics (interactivity, visual quality, novelty, informativeness) and consumer perceptions (enjoyment, usefulness, hedonic value) and their effects on satisfaction, attitude, and purchase intention. Results indicate that visual quality and informative aspects of AR most significantly influence consumer perceptions, while enjoyment  and  hedonic  value  significantly  affect  consumer  satisfaction  and  positive  attitudes.  These
findings provide guidance for e-commerce practitioners to balance practical functionality with engaging experiences in developing AR applications as an effective marketing strategy

This study aims to analyze the effectiveness of the Indonesian Advertising Ethics (EPI) in regulating advertisements in the digital era, based on the gap between regulations and practice in the field. The research utilizes a qualitative approach, employing documentary studies and in-depth interviews to gain a comprehensive understanding of the issue. The results show that the EPI's effectiveness in maintaining fairness, honesty, and responsibility in digital advertising is still weak. This weakness is not due to the substance of the EPI itself, but mainly because of the rapid development of technology, the vast expansion of digital media, low compliance from practitioners, and the self-regulatory approach that relies on the awareness and responsibility of each actor. The study also finds a gap between regulation and practice due to the EPI’s continued use of a framework designed for traditional media, making it less adaptable to digital media's unique challenges. Therefore, the research concludes that a more adaptive, collaborative, and multi-stakeholder approach is required to safeguard advertising ethics and protect the public's interest in the digital era

Lack of knowledge about nutrition makes children buy food without knowing whether the food contains sufficient nutrition or not. In fact, food has an important role in children's growth and development because it is the main builder of growth and development. Nutrition education is very much needed to improve children's knowledge and behavior. The storytelling method is one of the educational methods that can be used in an effort to teach students a healthy lifestyle, including about healthy food. The purpose of this community service is to increase students' knowledge about healthy food by using the storytelling method so that children are expected to behave healthily by consuming healthy food and snacks. Community service was carried out at Bambini School Paguyangan with 19 students aged 3-6 years. The activity went well, there was an increase in children's knowledge about healthy food and participants were very enthusiastic in answering questions. Healthy food education can also prevent students from buying snacks carelessly and choosing healthy foods. Healthy food education regarding the selection of healthy foods is expected to create a healthier generation.