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Algoritma Reversible Data Hiding dalam Mengamankan Karya Seni Gambar Digital
No full textIn today's digital era, protecting digital artworks, particularly images, has become increasingly important to prevent copyright infringement and forgery. This paper proposes a novel method for embedding secret data into images using Reversible Data Hiding (RDH) techniques that leverage histogram shifting and random sub-blocks. The method is designed to maintain the visual integrity of the image while allowing the insertion of critical information, such as copyright metadata. The dataset used consists of 13 digital artworks sized 1280x720 pixels in PNG format, reflecting a diversity of textures and colors. Experimental results demonstrate that the proposed method achieves a high embedding capacity with PSNR values exceeding 37 dB, indicating excellent image quality post data insertion. Additionally, the method exhibits resilience against illegal modifications, with the ability to detect changes in images that have had data embedded. By integrating a PIN-based authentication system, the method enhances the security and integrity of the embedded information. This research significantly contributes to the field of digital artwork protection, offering an effective solution to preserve the authenticity and aesthetic value of images while enabling secure and reversible data insertion. The findings underscore the potential of RDH techniques in safeguarding sensitive information across various applications, ensuring that digital artworks can be both protected and enjoyed without compromising their quality.Di era digital saat ini, melindungi karya seni digital, khususnya gambar, menjadi semakin penting untuk mencegah pelanggaran dan pemalsuan hak cipta. Makalah ini mengusulkan sebuah metode baru untuk menyematkan data rahasia ke dalam gambar dengan menggunakan teknik Reversible Data Hiding (RDH) yang memanfaatkan pergeseran histogram dan sub-blok acak. Metode ini dirancang untuk menjaga integritas visual gambar sambil memungkinkan penyisipan informasi penting, seperti metadata hak cipta. Kumpulan data yang digunakan terdiri dari 13 karya seni digital berukuran 1280x720 piksel dalam format PNG, yang mencerminkan keragaman tekstur dan warna. Hasil eksperimen menunjukkan bahwa metode yang diusulkan mencapai kapasitas penyisipan yang tinggi dengan nilai PSNR melebihi 37 dB, yang menunjukkan kualitas gambar yang sangat baik setelah penyisipan data. Selain itu, metode ini menunjukkan ketahanan terhadap modifikasi ilegal, dengan kemampuan untuk mendeteksi perubahan pada gambar yang telah disisipi data. Dengan mengintegrasikan sistem otentikasi berbasis PIN, metode ini meningkatkan keamanan dan integritas informasi yang disematkan. Penelitian ini secara signifikan berkontribusi pada bidang perlindungan karya seni digital, menawarkan solusi yang efektif untuk mempertahankan keaslian dan nilai estetika gambar sekaligus memungkinkan penyisipan data yang aman dan dapat dibalik. Temuan ini menggarisbawahi potensi teknik RDH dalam melindungi informasi sensitif di berbagai aplikasi, memastikan bahwa karya seni digital dapat dilindungi dan dan dinikmati tanpa mengorbankan kualitasnya.
 
Pemanfaatan Limbah Sagu (Metroxylon sp) sebagai Bahan Baku Biokomposite Ramah Lingkungan
Get PDFPenelitian ini mengevaluasi sifat fisik dan mekanik biokomposit dengan menggunakan sagu aren (LS) sebagai bahan tambahan. Temuan utama dari penelitian ini menunjukkan bahwa semua biokomposit LS yang diuji memenuhi standar densitas JIS (2003), meskipun terjadi penurunan densitas karena penambahan LS menyebabkan lebih banyak rongga dalam struktur. Kadar air dari semua biokomposit LS berada dalam batas yang diizinkan oleh standar JIS (2003), meskipun sedikit lebih tinggi karena sifat higroskopis LS. Pengembangan ketebalan biokomposit LS meningkat dengan penambahan LS, terutama pada komposisi LS yang lebih tinggi, tetapi masih memenuhi standar. Hasil uji mekanik menunjukkan bahwa kekuatan tekan optimum dicapai dengan penambahan LS hingga 35%, sedangkan penambahan LS lebih dari itu menurunkan kekuatan tekan. Biokomposit LS yang diuji ternyata memiliki variasi sifat fisik berdasarkan komposisi bahan dan hasilnya tetap memenuhi standar kualitas yang berlaku. Hal ini menunjukkan potensi LS sebagai bahan aditif dalam produksi biokomposit yang memenuhi standar kualitas yang telah ditetapkan
Analysis Of Corrosion Potential Changes And Tensile Strength Of Stainless Steel 304 After Thermal Loading
Get PDFThis study investigates the effects of thermal loading at 650°C and subsequent heat treatment at 450°C on the corrosion potential, tensile strength, and microstructure of Stainless Steel 304. Thermal loading increased the corrosion potential from 387 V to 569 V and reduced tensile strength from 3596.06 MPa to 3151.39 MPa, indicating heightened vulnerability to corrosion and mechanical degradation. Heat treatment for durations of 2, 4, and 6 hours gradually restored the material's properties, with corrosion potential decreasing to 391 V and tensile strength improving to 3729.62 MPa after 6 hours. Microstructural analysis revealed a reduction in dislocation density and restoration of grain boundary integrity post-treatment. Elemental analysis confirmed the redistribution of chromium and iron as a key factor in enhancing the material's performance. These findings underscore the importance of post-thermal heat treatment in restoring the functional properties of Stainless Steel 304 for industrial applications.This study investigates the effects of thermal loading at 650°C and subsequent heat treatment at 450°C on the corrosion potential, tensile strength, and microstructure of Stainless Steel 304. Thermal loading increased the corrosion potential from 387 V to 569 V and reduced tensile strength from 3596.06 MPa to 3151.39 MPa, indicating increased vulnerability to corrosion and mechanical degradation. Heat treatment for durations of 2, 4, and 6 hours gradually restores the material's properties, with corrosion potential decreasing to 391 V and tensile strength improving to 3729.62 MPa after 6 hours. Microstructural analysis revealed a reduction in dislocation density and restoration of grain boundary integrity post-treatment. Elemental analysis confirmed the redistribution of chromium and iron as a key factor in enhancing the material's performance. These findings underscore the importance of post-thermal heat treatment in restoring the functional properties of Stainless Steel 304 for industrial applications
Techno-economic and Environmental Analysis of Hybrid Energy System (HES) in an Isolated Area
Get PDFThis study aims to identify the most efficient hybrid energy system configuration from a techno-economic and environmental perspective in an isolated area. The existing system of electrification in remote areas that still rely on diesel power plants incurs high operational costs and produces significant carbon emissions. As a solution, a Hybrid Energy System (HES) integrating solar power plants, diesel power plants, and battery energy storage systems (BESS). The study analyzes the HES configuration on Kodingareng Island using HOMER Pro software. The parameter configuration includes 2024 electricity demand, technical specifications from power plant nameplates, diesel power plant-related data, and market-based estimates for other components. Simulation results show that the optimized system achieves a Net Present Cost (NPC) that is Rp6.76 billion lower than the existing system, with the difference increasing to IDR 8.5 billion when emission penalties are considered. The Levelized Cost of Energy (LCOE) for the optimized system is Rp322.23/kWh lower than the existing configuration, and with emission penalties, the savings increase to Rp405.77/kWh. These findings highlight the potential of HES to reduce costs and emissions in the electrification of remote islands
The Role of Financial Literacy and Risk Tolerance on Investment Decisions
Get PDFThis study investigates the influence of financial literacy and risk tolerance on investment decisions among students of the Business Administration and Accounting Departments at Politeknik Negeri Ujung Pandang. The importance of this research lies in the increasing awareness among students regarding the value of investing, yet their decisions often rely solely on existing financial knowledge without adequate consideration of risk management, leading to inconsistent results. Addressing this gap, the study aims to determine whether financial literacy and risk tolerance significantly contribute to students’ investment decision-making. The research employs a quantitative approach using a purposive sampling technique to select 86 respondents who have prior investment experience. Data were collected through questionnaires and analyzed using SPSS version 25, incorporating validity tests, reliability tests, normality tests, multicollinearity tests, t-tests, and F-tests. The findings revealed that financial literacy and risk tolerance simultaneously exert a positive and significant effect on investment decisions. Furthermore, both variables individually demonstrate a positive and significant influence. These results highlight that investment decisions are shaped not only by knowledge but also by the ability to manage risks, suggesting that enhancing both aspects is crucial for improving investment outcomes among students
MEMBANGUN EKONOMI KREATIF DAERAH MELALUI PENINGKATAN KAPASITAS DAN INOVASI SUMBER DAYA MANUSIA
Get PDFHis study aims to formulate strategies for developing regional creative economy through capacity building and human resource (HR) innovation. The creative economy plays an important role in increasing regional income and generating new employment opportunities; however, its development often faces constraints such as limited skills, restricted access to technology, and weak cross-sector collaboration. The research applied a mixed-methods approach by combining a quantitative survey of 100 creative economy actors with qualitative interviews involving 15 key informants from local government, academia, and business communities. Data were analyzed descriptively using SPSS, while qualitative thematic analysis was conducted with NVivo. The findings indicate a significant positive relationship between HR empowerment and the competitiveness of the creative economy, with a correlation coefficient of 0.725. Analytical Hierarchy Process (AHP) analysis identified four strategic priorities: improving access to technology (40%), skills training (30%), business mentoring (20%), and stakeholder collaboration (10%). The study concludes that strategies focusing on digitalization and HR innovation are essential in building an inclusive, adaptive, and competitive regional creative economy ecosystem
PERAN KECERDASAN BUATAN (AI) DALAM AUDIT KEUANGAN PELUANG DAN TANTANGAN BAGI PROFESI AKUNTAN DI ERA DIGITAL
Get PDFThis study examines the role of Artificial Intelligence (AI) in financial auditing by exploring its opportunities, implementation challenges, and strategic implications for the accounting profession in Indonesia. Using a mixed-methods approach with qualitative dominance, the research integrates interviews, surveys, case studies, and FGDs supported by NVivo and SPSS analysis. The findings indicate that AI adoption in auditing is still limited and shaped by professional readiness, regulatory alignment, and institutional capacity. Rather than emphasizing numerical adoption rates, the study highlights emerging patterns of digital adaptation, the perceived need for competency development, and the widening gap in technological preparedness. Theoretically, this research strengthens the discourse on digital transformation in auditing by positioning AI adoption within the frameworks of innovation diffusion and professional readiness. It offers a conceptual perspective on how technological disruption reshapes audit practices, ethical considerations, and regulatory expectations. The study provides insights relevant to academia, practitioners, and policymakers in advancing AI-based audit transformation
PELATIHAN DAN PENDAMPINGAN PENYUSUNAN RENCANA BISNIS KOPERASI MERAH PUTIH DI KOTA PAREPARE
Get PDFThe purpose of this training and mentoring program was to enhance the abilities (knowledge and skills) of the Merah Putih Cooperative management in Parepare City in preparing structured and realistic business plans. This activity was carried out through several stages, including the distribution of tasks among the implementation team, the preparation and development of training materials, technical coordination, the dissemination of learning materials to participants, the delivery of training attended by 44 cooperative administrators, and the evaluation of training outcomes. In addition, consultation and ongoing mentoring services were provided to participants who required assistance in drafting their cooperative business plans. Throughout the training, participants demonstrated high enthusiasm, discipline, and active engagement in every session. The results of this activity showed that the training successfully improved participants’ understanding in identifying business opportunities, formulating business ideas, conducting feasibility analysis, understanding the components and format of a business plan, and independently preparing a complete business plan document. This program is expected to encourage cooperatives to be better prepared in accessing financial resources and developing their businesses sustainably. 
RANCANG BANGUN APLIKASI WEBSITE YAYASAN BINA INSAN CENDIKIA LUKMANUL HAKIM KABUPATEN GOWA
Get PDFThis study aims to design and develop an official website for the Bina Insan Cendikia Lukmanul Hakim Foundation by utilizing Visual Studio Code technology and the PhpMyAdmin database. The formulation of the problem raised in this study includes how to design an effective website in presenting foundation information and providing convenience for the public to participate through online donations. The benefits of developing this website include increasing the transparency of the foundation, facilitating public access to information, and encouraging active participation in foundation programs. As a solution, this study presents essential features such as foundation profiles, donation pages, and registration, all of which are designed to meet the information and interaction needs of users. The evaluation results show that this website has succeeded in achieving its stated goals, supporting the dissemination of foundation information, and facilitating participation effectively, with an average eligibility score of 92.6%, indicating that this website has succeeded in achieving its stated goals. Users highly rate the aspects of ease of use, attractive appearance, and completeness of the information presented
IDENTIFICATION TYPE OF GAS BASED ON DISCHARGE TIME MEASURING IN LIGHT EMITTING DIODE SERIES
Get PDFNowadays, gas or vapor detection to observe environment situation is very required in many fields. Spectrophotometer method is always used to analyze contain and gas concentrate based on the absorption intensity of light by the gas sample. This research used Light Emitting Diode (LED) series act as a transmitter and light receiver (detector). Above detector surface is layered by a chemical membrane that selective in to the type of gas according the polarization level. This vapor absorption in chemical membrane can cause shrinking the intensity of light that hit the detector. This light will be discarding the load in internal capacitor of the detector. Duration internal sudden discharge of the LED depends on light intensity that hit it. Detector LED series that layered by different chemical membrane is produce different an absorption phase that patterning different discharge time. In this experiment, alcoholic solution and gasoline are used as vapor samples. Identify types of gas using imitation nerve connection method to finding out every type of gas with 80% success.