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This study aims to develop a data security system for the Pancadaya Waste Bank web-based application by implementing a hybrid cryptography algorithm combining AES and RSA. The main problem identified is the vulnerability of manually recorded and unsecured transaction data. The research applied a qualitative approach through interviews with system users and the Environmental Agency, as well as literature reviews on hybrid cryptography algorithms. The system was developed using the Rapid Application Development (RAD) method and implemented using PHP, MySQL, and the OpenSSL library. The results show that the system successfully encrypts transaction data using AES and secures the AES key with RSA, thereby enhancing data security. Testing with GTmetrix indicates excellent application performance. Furthermore, the system can display and decrypt real-time transaction data in receipt form for both deposit and withdrawal processes. This application provides an innovative solution to data management and transaction security issues in digital-based waste bank systems.

SMA Negeri 1 Baturiti merupakan salah satu instansi pendidikan di bawah naungan Dinas Pendidikan Kabupaten Tabanan yang memiliki berbagai aset penunjang kegiatan belajar mengajar. Proses pelaporan aset selama ini masih dilakukan secara manual menggunakan Microsoft Word, sehingga kurang efisien dan sering mengalami keterlambatan dalam pelaporan kepada Dinas Pendidikan. Untuk mengatasi permasalahan tersebut, dirancang dan dibangun sistem dengan judul Optimalisasi Pengelolaan Inventaris Sekolah Melalui Sistem Inventory Berbasis Web di SMA N 1 Baturiti. Sistem ini dikembangkan menggunakan bahasa pemrograman PHP dan database MySQL, serta dilengkapi fitur pencetakan laporan dengan PHP Word dan PHP Excel. Sistem ini mempermudah proses input data aset dan menghasilkan laporan yang lebih cepat, akurat, dan terstruktur. Dengan adanya sistem ini, diharapkan pelaporan aset sekolah kepada Dinas Pendidikan dapat dilakukan secara lebih tepat waktu dan efisien.

State Senior High School 7 Surakarta is one of the public schools located in Surakarta City. The library activities, including member data management, book processing, and book borrowing and returning, are still conducted manually using physical logbooks. This manual process is considered inefficient and prone to errors. The purpose of this study is to develop a book borrowing system at State Senior High School 7 Surakarta that serves as a tool to assist officers in recording, loans, and returning books. This system is designed using the CodeIgniter framework to support WEB displays, programming in PHP, and using MySQL for database management. This system is created using the System Development Life Cycle (SDLC) method with a waterfall model that includes the stages of analysis, design, implementation, testing, and maintenance. System testing was conducted using Black-Box Testing and the System Usability Scale (SUS). The Black-Box Testing results showed that all features and functions operated correctly. The SUS evaluation produced a score of 75.68%, indicating that users generally agreed with the implementation of the system, which falls under the "acceptable" classification.

Intuisi Coffee, sebuah kafe di Blang Kolak, Aceh Tengah, masih mengelola proses pemesanan dan transaksi secara manual, yang berdampak pada kurangnya efisiensi dalam pencatatan, pengelolaan stok, dan penyusunan laporan. Penelitian ini bertujuan untuk mengimplementasikan sistem informasi berbasis web guna meningkatkan efisiensi operasional kafe. Pengembangan sistem dilakukan menggunakan metode Waterfall dengan memanfaatkan XAMPP, PHP, dan MySQL sebagai teknologi utama. Evaluasi sistem menggunakan System Usability Scale (SUS) untuk mengukur tingkat kegunaan dari sisi efektivitas, efisiensi, dan kepuasan pengguna. Hasil evaluasi menunjukkan skor SUS sebesar 64,9, yang mengindikasikan sistem berada pada kategori kegunaan yang cukup baik. Implementasi sistem ini terbukti dapat mempercepat proses transaksi, mempermudah pengelolaan data, dan mendukung pengambilan keputusan secara lebih terstruktur

The birth certificate archive management system at the Central Aceh Population and Civil Registration Office still uses manual methods, which causes data search and storage to be less efficient. Therefore, this study aims to design and develop a web-based birth certificate data archive information system with the Waterfall method so that the management of data is more effective, secure, and organized. The development method used is Waterfall, which consists of the stages of analysis, design, implementation, testing, and maintenance. This system was built using the PHP programming language with the Laravel framework, and using MySQL as a database. The results of implementation shows that this system is able to manage archives digitally, facilitate data search, and reduce the risk of loss or damage to physical documents. System testing is carried out using the Black Box Testing method, which shows that all main features of the system function in accordance with the designed specifications. Evaluations from users of the system also show that the system is easy to use and increases efficiency in managing birth certificate archives. With this system, it is expected that the population administration process at the Population and Civil Registration Office of Central Aceh can run faster and more accurately, and provide better services to the community.  

This research iss motivated by the problem of the lack of digital learning facilities that can be flexibly accessed by students and theachers at SMP Djama'atul Ichwan Surakarta, so that interaction in the theaching and learning proces is limited. The theories applied in this study include the concept of E-Learning as a distance learning method rooted in information technology, web-based system development, and an interactive technology integration approach to increase effectiveness and engagement in learning. The method used is the Waterfall model system development life cycle (SDLC), which includes the stages of needs analysis, system design, implementation with PHP and MySQL using the CodeIgniter framework, and function testing. The research findings show that the designed web-based E-Learning system successfully provides features for managing student and teacher data, distributing teaching materials, scheduling lessons, giving assignments, and interaction through discussion forums. This system is considered capable of supporting a more organized and interactive online education process.The implementation of this systemis expected to a long-term solution to overcome the limitations of traditional learning methods and become a foundation for the development of digital learning platforms in the futur.

Penelitian ini bertujuan untuk mengelompokkan penjualan berbagai merek beras di UD. Nainggolan menggunakan algoritma K-Means Clustering. UD. Nainggolan merupakan usaha yang bergerak di bidang penjualan sembako, termasuk beras dari berbagai merek. Permasalahan utama yang dihadapi adalah kesulitan dalam memahami tren penjualan dan preferensi pelanggan, yang berdampak pada pengelolaan stok dan strategi pemasaran. Penelitian ini memanfaatkan data penjualan dari Maret 2024 hingga Februari 2025, dengan fokus pada 9 merek beras. Data dianalisis untuk diklasterisasikan ke dalam 2 kategori:, laris, dan kurang laris. Hasil dari penelitian ini adalah sebuah sistem berbasis web yang dibangun menggunakan PHP dan MySQL, yang mampu mengelompokkan penjualan beras berdasarkan algoritma K-Means. Sistem ini diharapkan dapat membantu pihak manajemen dalam pengambilan keputusan terkait pengelolaan stok dan strategi penjualan yang lebih efisien dan tepat sasaran.

In the current era of digitalization, villages are expected to follow technological developments to modernize correspondence services. Village administration services delivered via the internet enable the village government to communicate information quickly and simply to all village officials, the community, village organizations and the community within the village. Apart from that, the community can submit input to the village government through village information services to direct development in a more positive direction. The problem in Serasah Village that often occurs is that the village head and office staff concerned with carrying out services are often not at the village office because they are out of town on business or there are sub-district meetings and currently there are additional activities in the form of training. electrical installation from BLKP Jambi. So many residents experience obstacles because of this, in fact, some residents who live far from the office area often receive less than optimal service. Based on this problem, it is necessary to design an information system at the Serasah Village office which will take the form of a website which has features regarding information regarding news and activity agendas that will be carried out at the Serasah Village Office, features for online letter submission services and checking the status of letter submissions made. by society. The system development method used to develop websites is the waterfall model. After creating the website, the website testing stage was carried out using the black box testing method with successful test results and a feasibility test was carried out using a Likert scale model. The results of the feasibility test were carried out using a questionnaire and data was obtained with an average percentage of 81.6%.

Suwargi Buwana Djati Integrated MA is one of several schools located in Cirebon area. The purpose of this research is to develop a website for the New Learner Information System at Suwargi Buwana Djati Integrated MA. CodeIgniter framework, Visual Studio Code editor, and PhpMyAdmin database management systems are used as tools for the development of information systems . One of the system development methods used is the Waterfall model, which includes analysis , design , implementation , and testing. The results of this research is a website called the New Student Admission Management Information System at Suwargi Buwana Djati Integrated MA which can operate properly .

We designed and implemented a web-based inventory system to address challenges in managing inventory and financial data at Toko bangunan Mutiara. With high daily transaction volumes and a wide variety of products, manual recording often leads to errors, inaccuracies in inventory data, and difficulties in monitoring cash flow. To address this, we developed the system using the Agile/Scrum development model, which allows for flexibility and adaptation to user needs through the stages of Requirements, Design, Development, Testing, Deployment, and Review. The system was developed using web technology, including PHP and JavaScript for the backend, HTML and CSS for the frontend, and MySQL as the database system. The main features we implemented include two integration options: barcodes and unique product codes to simplify recording, automatic notifications when stock reaches the minimum level set by the system, and the ability to generate accurate reports. It is hoped that this research, which was designed to enhance operational efficiency in recording incoming and outgoing goods, provide flexible and accurate access to inventory data, and minimize errors in recording and inaccurate data, will be successful. The implementation of this system contributes to more accurate inventory management and supports better financial decision-making for Toko bangunan Mutiara.

The problem of decision making for admitting new students at SMK Fajar Bogor is that they still use Microsoft Excel so they experience several obstacles and a lack of systematicity in decision making regarding new students at SMK Fajar Bogor.  This research aims to design an application to make the processing of prospective new students' grades easier and to design a more systematic decision-making application regarding the admission of new students to SMK Fajar Bogor. This research identifies the criteria for diploma grades, test scores, psychological test scores and zoning. The Simple Additive Weighting (SAW) method was used to design, develop and test a decision support system at the SMK Fajar Bogor school. This system is designed using the PHP programming language and MYSQL database. The results of the research are that the process of processing the grades of prospective new students becomes easier, decision making regarding the acceptance of new students at SMK Fajar Bogor becomes more systematic.

PT. Gemilang Sejahtera Abadi (GSA) is a company engaged in the oil palm plantation business, which is spread across the East Kutai Regency, precisely in Long Mesangat District. It is still difficult for office admins to monitor plantation results and production results by relying on paper records, via telephone and SMS, making it difficult to understand palm oil production data. The computerized system used when the research was conducted still used Microsoft Excel and Microsoft Word. The purpose of this study was to create a web-based Monitoring Information System Design application for the PT. Gemilang Sejahtera Abadi office admin. The method used is the Waterfall method which consists of 5 stages, namely: communication, planning, modeling, construction and system submission. The system created is web-based using the PHP programming language and MySQL database.The results of the study concluded that the design of the plantation production monitoring system for the office admin can be implemented and is expected to help the office admin in managing harvest data and can reduce errors in the data input process.

Abstract. A store requires an effective and efficient accounting information system to manage its finances, ensuring business continuity and financial sustainability. One such case is Am Collection Store, which has not yet adopted computer technology. The store still uses manual methods for cash receipts processing. This Cash Receipt Application was designed using the waterfall method, applied as a system development method, and utilizes PHP and MySQL programming languages. The objective is for Am Collection Store to record all cash receipts from sales without the need for manual bookkeeping. The system design tools used include UML, such as Use Case Diagram,  and Class Diagram. The result of this research is the design of a web-based accounting information system for cash receipts, which simplifies cash management to be more effective and efficient. Additionally, it produces detailed reports on matters related to the cash receipt processes from transactions conducted by both customers and sellers.

Manual inventory management at Toko Terang Abadi presents various challenges, including delays in reporting and high recording errors. This study aims to improve accuracy and efficiency in stock management by creating a web-based inventory information system using the Waterfall method. Data collection was conducted through interviews, direct observation of store activities, and literature review. The system was designed and implemented using PHP and MySQL, and tested using black-box testing methods to ensure all functions work according to user needs. Implementation results show that recording efficiency increased by 50% and input errors decreased by 90%. These findings support previous research highlighting the importance of digitalizing inventory systems in the SME and retail sectors to improve effectiveness and accuracy in managerial decision-making.

The rapid development of information and communication technology has opened up significant opportunities to enhance service efficiency in various fields, including the beauty industry. Soraaya Studio, which offers a range of beauty services, currently still manages appointment scheduling manually. This manual system leads to several challenges, such as difficulties in efficient schedule management, data duplication, recording errors, and disorganization in the service reservation process. Furthermore, communication with customers regarding schedule confirmation becomes less effective. With the increasing number of customers, this manual scheduling system is no longer able to meet the growing complexity of operational needs.To address these issues, a web-based appointment scheduling system has been designed, which is integrated and user-friendly. This system is built using the PHP programming language with a MySQL database and features a responsive interface, making it easily accessible from various devices, including desktops and mobiles. Key functionalities provided include real-time creation, modification, and cancellation of appointments, management of service availability, and automated notifications via email or text messages to customers and studio staff. The implementation of this system aims to improve the accuracy and speed of the scheduling process, reduce manual errors, and facilitate schedule monitoring by management and staff, thereby enabling Soraaya Studio to provide a more professional and satisfying service to its customers.

In the era of increasingly advanced technological development, decision support systems (DSS) play an important role in improving the quality of decision-making in the education sector. The selection staff at SMP Dharma Bakti find it difficult to objectively determine the best academic students because they still use a manual method that is prone to errors. This research aims to design a web-based decision support system that can help selection staff assess and determine their best academic students objectively and quickly. This system is developed using the PHP programming language, MySQL database, LARAVEL 8 framework, and applies the Analytical Hierarchy Process (AHP) method within it. This research produces a system that allows the SMP Dharma Bakti Selection Officers to input alternative data, namely student data, determine the weight of criteria and sub-criteria, and view the ranking results automatically, thus greatly facilitating the SMP Dharma Bakti Selection Officers in determining their best academic students.

This research focuses on creating the employees’ performance reporting application of Health, Safety, and Environment (HSE) of PT. IWIP Weda. The main aim of this development system is to optimize the making of the HSE employees' daily report. The Waterfall development method was chosen as the methodological approach in designing and implementing this application. The application is build based on web with PHP programming and MYSQL. Through this application the super admin is able to arrange the employees’ work report. Along with that, the frontman is able to dig out the occupational health violations in real time. Futhermore, this application loads the information of Occupational Safety and Health (K3). This web application is dessigned to be accessed online. Thus, the user is able to access information anytime and anywhere. In the final analysis, this application is able to simplify the reporting process, defining the HSE perfomance, discovering the occupational health violations, and storaging the data efficiently. The black-box testing shows that the system functions can run well. Moreover, application system has met the needs and showing good results. Based on the User Acceptance testing (UAT), the average value is 86%.

The Constitutional Court (MK) Decision Number 55/PHPU.BUP-XXIII/2025 is an important precedent in the dynamics of regional head election law in Indonesia. The Constitutional Court canceled the participation of the North Gorontalo Regent candidate pair because one of the candidates was still undergoing a criminal probation period. This article analyzes the Constitutional Court's legal considerations and their implications for the principle of legal certainty and protection of voters' constitutional rights. This study uses a normative legal approach with a descriptive-qualitative analysis method of laws and regulations and Supreme Court decisions. The results show that the enforcement of strict nomination requirements by the Constitutional Court emphasizes the importance of compliance with the law in the democratic process, while ensuring that regional head candidates have proper moral and legal integrity, this decision also emphasizes that the election process is not only procedural, but also substantial in ensuring the quality of leadership that will be elected. In addition, this decision provides guidelines for election organizers, especially the General Election Commission (KPU), to be more careful in conducting factual verification of candidate requirements. On the other hand, political parties are encouraged to be more selective in nominating candidates, in order to avoid potential legal disputes that could harm public trust in democracy.

 Toko Percetakan Zacky Karya Abadi masih mengelola data stok dan penjualan secara manual, yang menimbulkan berbagai tantangan operasional. Penelitian ini bertujuan untuk merancang dan membangun sebuah sistem informasi berbasis web guna menyederhanakan dan mengotomatisasi proses tersebut. Metode pengembangan yang digunakan meliputi tahapan observasi, wawancara, serta perancangan sistem menggunakan alat bantu seperti Activity Diagram, Usecase Diagram, dan ERD, yang diimplementasikan dengan PHP dan MySQL. Hasilnya adalah sebuah sistem informasi terintegrasi dengan akses berbasis peran untuk pemilik, admin, karyawan, kasir, dan pelanggan. Sistem ini memiliki fitur modul manajemen stok, transaksi penjualan, pengelolaan pengguna, dan pelaporan operasional otomatis. Implikasi dari sistem ini adalah peningkatan efisiensi operasional secara signifikan, pengambilan keputusan yang lebih cepat dan akurat melalui laporan real-time, serta meminimalkan risiko kehilangan data.

 In today's digital era, efficient and accurate inventory management is crucial to support operational effectiveness in business sectors, including retail optics stores. Optik Retna, a retail optical business, previously utilized Microsoft Excel for stock management, which led to various limitations such as restricted multi-user access, risk of data loss, and lack of real-time reporting. To address these challenges, a web-based inventory system was designed and implemented using the Agile methodology. The system was developed using HTML, CSS, JavaScript, PHP, and MySQL, and includes key features such as inventory tracking, expense and return management, transaction recording, sales reporting, and user administration. The implementation results demonstrate that the system enhances work efficiency, simplifies the recording of incoming and outgoing goods, and supports faster and more accurate decision-making at Optik Retna. Therefore, this system provides a practical contribution to the digital transformation of small and medium-sized enterprises in the optical sector.