Petra Christian University

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    Experimental and Confining Pressure Analysis of Steel Clamp Confined Unreinforced Concrete Subjected to Axial Concentric Load

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    Vertical cracks and spalling of the concrete cover in reinforced concrete structures are examples of failure modes of concrete columns due to repeated earthquake loads. Strengthening methods have been introduced including external jacketing using costly carbon FRP. This study investigated external strengthening of cylindrical concrete using low-cost thin steel confining sheets subjected to concentric axial loads. The experimental works in this study tested the tensile strength of the confining steel elements, the compressive strength of unconfined and confined cylindrical concrete. The composition of the steel confining elements is positioned in such that it could generate an optimal confinement effect and prevent local buckling. This study also developed the formulation of the confining stress and ultimate axial load based on the test results of the current study and past research data. The results showed that the use of steel clamp elements improves the axial strength and axial deformation of cylindrical concrete columns by over 200% without buckling of the clamp elements. The external confinement method can reduce vertical cracks and strain localization that usually occur in conventional cylindrical concrete. The proposed formulation of the confining stress and the ultimate axial load provided accurate results compared to the experimental results

    Dari Kemasan Ke Fasade: Pendauran Kreatif Material Sebagai Fasade Arsitektur Berkelanjutan

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    This study aims to explore the potential use of discarded product packaging materials as fa�ade components in architectural design. It responds to the growing demand for sustainability in architecture, where material selection plays a critical role. The research offers a scholarly contribution by proposing a novel approach to fa�ade materiality, highlighting the innovative use of packaging waste as both expressive and functional design elements�distinct from previous studies that primarily emphasize technical or conventional recycling aspects. The study investigates the relationship between waste, material, and design creativity through a qualitative approach using an exploratory case study method, illustrating how product packaging can be repurposed into inventive fa�ade applications. Three case studies located in Indonesia, identified through a review of published design literature, reinforce the local context of recycled material implementation. The packaging materials are evaluated based on their physicalcharacteristics, supporting construction techniques, and their architectural function and role. The findings reveal the significant potential of using discarded packaging materials as architectural fa�ades, particularly in reducing waste, enhancing environmental sustainability, and lowering construction costs. Furthermore, the study underscores the creative challenges and opportunities for architects in exploring and composing recycled materials. Considerations of material, geometry, and character emerge as key aspects of this materiality. The study suggests that the use of discarded packaging materials not only supports sustainability but also paves the way for innovation in design and creative construction within architecture

    Pendampingan dan Pelatihan Usaha Rental PlayStation dan Café Bagi Mahasiswa di Sidoarjo

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    Tingginya tingkat kegagalan usaha baru yang dijalankan wirausaha muda menjadi salah satu permasalahan utama dalam pengembangan kewirausahaan di Indonesia. Oleh karena itu, kegiatan pengabdian masyarakat ini bertujuan memberikan pendampingan dan konsultasi terkait kelayakan bisnis bagi mahasiswa yang berencana membuka usaha rental PlayStation dan café di Sidoarjo. Dalam rangka meningkatkan kegiatan usaha ini, metode yang digunakan meliputi sosialisasi terkait pengelolaan usaha bisnis rental dan café, serta pendampingan langsung pada mahasiswa sebagai mitra dalam merancang dan memulai bisnis tersebut. Selain itu, promosi bisnis juga dilakukan melalui sosial media sebagai sarana pemasaran yang efektif. Hasil dan kegiatan pengabdian ini adalah terbentuknya usaha Rental Playstatiion dan café di Sidoarjo yang dapat berkontribusi pada pemberdayaan ekonomi local. Melalui kegiatan pengabdian masyarakat ini, mahasiswa mendapatkan solusi parakits yang berdampak positif bagi perkembangan kewirausaaan di tingkat lokal

    Determinants of Tax Compliance: An Investigation at The Kupang Primary Tax Service Office (KPP Pratama Kupang)

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    Tax becomes the prime and major sources of state revenue. Taxes play an important role because it is related to state revenue. Increased income from the tax sector can be achieved by improving tax compliance from taxpayers. This study aims to explain the effect of tax administration modernization and socialization on tax compliance at the Kupang Primary Tax Office (KPP Pratama Kupang). The sample size of the study is 400 individual taxpayer samples. Data collection was done using a research questionnaire, as part of the quantitative research. The multiple linear regression analysis was used to analyse the data. The research findings indicate that the administration modernization and sanctions have a negative effect on the tax compliance of registered taxpayers at the KPP Pratama Kupang

    Peningkatan literasi dan manajemen keuangan rumah tangga melalui pelatihan dan pendampingan di Desa Sooko

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    This community service activity aims to enhance financial literacy and household financial management for the residents of Sooko Village. Based on initial observations, it was found that many families in the village struggle with financial management, including budget planning, debt management, and the wise use of financial services. The lack of understanding of basic financial concepts has led most of the community to fall into consumptive habits and fail to save for urgent needs. To address this issue, training and mentoring were conducted using a service-learning approach, which combines academic learning with direct community interaction. The training program includes education on financial planning, distinguishing between needs and wants, and the practice of daily financial record-keeping. Additionally, individual coaching sessions and educational games were implemented to improve participants understanding. The results of the activity showed that the communitys awareness of the importance of financial management increased, with most participants beginning to adopt better financial practices. The success of this program confirms that an interactive educational approach can positively impact the financial well-being of the people of Sooko Village, Gresik

    PEMBELAJARAN KREATIF DAN LITERASI KEUANGAN MENGENAI HARGA POKOK PRODUKSI DI PANTI ASUHAN SOLA GRATIA

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    Pendampingan anak-anak dan remaja panti asuhan melalui kegiatan pembelajaran kreatif dan literasi keuangan sangat penting dalam mendukung kemampuan mengelola keuangan pribadi maupun membangun usaha mikro. Permasalahan yang dihadapi panti asuhan Sola Gratia adalah penghuni panti belum memiliki jiwa kemandirian dan kewirausahaan. Keuangan panti asuhan masih didukung oleh swadaya pemerintah, masyarakat individu, yayasan gereja, dan institusi lainnya. Kegiatan pengabdian ini mengembangkan cara pembelajaran ke tingkat yang lebih aplikatif dibanding semester sebelumnya. Dalam kegiatan ini anak-anak dan remaja di panti asuhan Sola Gratia diajarkan resep dan menghasilkan minuman yang bernilai jual, sekaligus memasarkannya di lingkungan sekitar panti asuhan. Tahapan kegiatan diawali ceramah pembekalan perhitungan harga pokok produksi, praktik produksi produk dan minuman, proses pemasaran produk, perhitungan keuntungan, dan evaluasi. Produk yang dihasilkan berupa minuman siap konsumsi, makanan berupa kue kering yang telah di-repacking, gelang dari manik-manik. Tim pengabdian memberikan modal berupa bahan-bahan membuat minuman berbagai rasa, kue kering kiloan, dan manik-manik berbagai bentuk. Salah satu aspek penting dalam merintis usaha mikro adalah pemahaman tentang perhitungan harga pokok produksi yang berperan besar dalam penentuan keberlanjutan bisnis

    PENGARUH VISUAL MERCHANDISING KKV GALAXY MALL SURABAYA TERHADAP REPURCHASE INTENTION DENGAN SHOPPING LIFESTYLE SEBAGAI VARIABEL MODERASI DAN IMPULSIVE BUYING SEBAGAI VARIABEL MEDIASI

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    This research aims to analyze the influence of Visual Merchandising at KKV Galaxy Mall Surabaya on Repurchase Intention, with Shopping Lifestyle as a moderating variable and Impulsive Buying as a mediating variable. Data collection for this research was conducted through direct surveys at KKV Galaxy Mall and online via Line, Whatsapp, and Instagram. A total of 124 respondents were successfully obtained and their data processed. The data analysis technique used was Partial Least Square (PLS). The results of this final research project indicate that Visual Merchandising does not have a significant effect on Repurchase Intention, Visual Merchandising has an effect on Impulsive Buying, Impulsive Buying has an effect on Repurchase Intention, Impulsive Buying significantly mediates the relationship between Visual Merchandising and Repurchase Intention, and Shopping Lifestyle does not moderate the relationship between Visual Merchandising and Repurchase Intention of KKV Galaxy Mall Surabaya customers

    Digital Module of Financial Appraisal for Energy Efficiency Investment

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    Redefining Scaffolding: The Potential of Temporary Architecture in Sustainability

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    This study explores the potential of scaffolding-based temporary architectural design within the framework of sustainable architecture. Traditionally utilized as a temporary structural element to facilitate construction processes, scaffolding has increasingly evolved into a central component in spatial formation across diverse design contexts. Employing a qualitative case study methodology with research about design approach, this research examines architectural typologies in Indonesia that utilize scaffolding as a fundamental element. The selected case studies span various project scales, encompassing both private and public functions and ranging from small to medium-sized developments. The primary aim of this study is to demonstrate how temporary structural elements can be reimagined as core components in spatial formation, presenting possibilities across various architectural applications. The reflections derived from this investigation are articulated as concepts and ideas that showcase how the temporality of architecture and structural elements can enhance sustainability in design. This study underscores the attributes of flexibility, adaptability, efficiency, and temporality in spaces and buildings formed through scaffolding-based designs. The findings reveal that innovative and creative applications of temporary structural elements as spatial formers hold considerable potential to advance sustainability in architectural discourse. The multifunctionality of such elements paves the way for more exploratory and unconventional design approaches. Additionally, this research highlights that scaffolding, when applied as a primary architectural element, can align with sustainability principles by enabling the creation of efficient, temporary spaces that are both adaptable and flexible. As a result, this study provides valuable insights for practitioners and academics seeking to develop innovative and sustainable approaches in architectural design

    Hubungan Keterampilan Mengajar Guru dengan Motivasi Belajar Murid pada Mata Pelajaran Matematika

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    This study aims to investigate the relationship between teachers’ teaching skills and students’ learning motivation in the Mathematics subject. The background of this research highlights the essential role of teachers in fostering a learning environment that stimulates student motivation, particularly in Mathematics, which is often perceived as challenging by many students. This study employs a quantitative correlational approach. The research instruments consisted of questionnaires distributed to students to assess their perceptions of their teachers’ teaching skills and their learning motivation levels. The normality test results indicated that the data were normally distributed (Sig. = 1.000 > 0.05). The linearity test showed a linear relationship between teaching skills and learning motivation (Sig. = 0.001 0.05) and a correlation coefficient of 0.430, indicating a moderate positive relationship between teachers’ teaching skills and students’ learning motivation. These findings are consistent with previous studies by Ole & Makausi (2022) and Sulle & Tulak (2021), which also showed that teachers’ teaching abilities significantly influence students’ interest and motivation. The results suggest the importance of enhancing teachers’ competencies in managing Mathematics instruction in creative and communicative ways to effectively boost students’ enthusiasm for learning

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