https://ar.iub.edu.bd/handle/11348/979 Sat, 27 Jun 2026 09:45:14 GMT 2026-06-27T09:45:14Z https://ar.iub.edu.bd/handle/11348/1233 Research on threat analysis and defense strategies for PABX voice server Nain, Md.Zulker The evolution of Cloud-PABX calling architecture introduced a revolutionary development in voice communication architecture, and this solution is receiving discernible attention because of its long-distance remote branch calling facility. Currently, an employee at one company can contact another employee who is located in a different location branch office by simply dialing the desired extension number. However, interbranch calling is essential, but present cloud pabx solutions relies on public IP address to interconnect different locations voice calling. All attacks on the server, such as ICMP attacks, denial of service (DoS) attacks, unauthorized entry, eavesdropping, interception of VoIP traffic, and UDP flooding attacks, come targeting that public IP, which creates a strong security threat. To overcome the challenge, we developed a secured network architecture where our pabx server can connect to a remote branch office without using a public IP. The unique thing about our work is that we used local IP as a server signaling IP and introduced the tunnel protocol for connecting long-distance remote branch calls. Then we evaluated the Thu, 01 May 2025 00:00:00 GMT https://ar.iub.edu.bd/handle/11348/1233 2025-05-01T00:00:00Z https://ar.iub.edu.bd/handle/11348/1232 SMART AI: designing intelligent systems for health, finance, and medical decisions for citizens. Raihan, Sharif Md. Rakibul; Asad, Ishtiaque; Rahman, Khandaker Waliur As global populations age, particularly in low- and middle-income countries (LMICs), there is an urgent need for intelligent systems that address the intertwined challenges of health monitoring, medical diagnostics, and financial management for elderly citizens. Existing AI solutions in these domains are often fragmented, digitally inaccessible, and culturally misaligned, leaving older adults especially those with low digital literacy underserved. This thesis presents SMART AI, an integrated, human-centered framework designed to empower the “smart elderly citizen” through three core subsystems: (1) HishabAI a Bengali-language financial assistant that automates expense tracking, including a dedicated medical finance tracker for healthcare-related costs and budgeting via SMS parsing, OCR, and AI-based forecasting; (2) ElderCare Pulse a wearable-enabled health monitoring system that tracks vital signs, medication adherence, and emergency events, with caregiver and institutional integration; and (3) a CNN based diagnostic engine capable of analyzing medical images to support clinical decision making in resource-constrained environments. The proposed development plan adopts a monolithic Django–PostgreSQL backend, a cross-platform Flutter mobile application, and Vue.js dashboards, with a design philosophy centered on localization, interpretability, privacy, and modular scalability. Field evaluations and prototype testing highlight the system’s feasibility and usability in semi-urban and rural Bangladeshi contexts, demonstrating its potential to deliver inclusive, interoperable AI solutions that connect personal well-being with institutional care for aging populations. Mon, 01 Sep 2025 00:00:00 GMT https://ar.iub.edu.bd/handle/11348/1232 2025-09-01T00:00:00Z https://ar.iub.edu.bd/handle/11348/1231 BongoAgro: a mobile application for reducing postharvest losses in fisheries Ashfaque, Youhana Ebnul; Sumi, Sadia Jaman As part of the fisheries industry in Bangladesh, its huge losses in the postharvest stage amounting to 25–30% annually are a significant economic and nutritional issue, as it occurs at an estimated economic cost of about 151 million every year. Lack of good cold storage, defective transportation, undesirable handling, and unavailability of market intelligence in real time forms the main causes of these losses. To overcome this, they created a mobile and IoT-integrated mobile application specifically to focus on Bangladeshi fish farmers called BongoAgro. By their platform, users can get real-time market prices, information about the local weather forecast, monitor the cold storage by the Internet of Things, get expert advice, and be informed offline, all arranged in a friendly Brahman language interface. Pilot testing has shown that it has cut down spoilage by 15-20% and increased farmer income by 12-18% which means that there is a lot of potential in enhancing supply chain efficiency and sustainability. This thesis introduces the formulation, the design, and the execution of BongoAgro, its relative strengths relative to competing solutions, and the potential to expand the potentially indicated expansion of digital interventions to improve food safety and rural livelihoods. Mon, 01 Sep 2025 00:00:00 GMT https://ar.iub.edu.bd/handle/11348/1231 2025-09-01T00:00:00Z https://ar.iub.edu.bd/handle/11348/1230 BongoAgro: a mobile solution for postharvest loss reduction fruits and vegetables Roknuzzaman, Md.; Islam, Merajul The fruits and vegetables sector of Bangladesh suffers postharvest losses estimated at 25-40% of production, the economic and nutrition consequences of which are huge. Such losses are promoted by inefficient cold storage, poor transportation, handling, and access to market information. To overcome these challenges, BongoAgro was developed in the form of a mobile application with mapped digital tools that small holder farmers could have integrated use. With the help of the app, the real-time update is available on the market price, weather forecast, cold chain management support, and expert advisory services are within reach of fishers in a Bengali language-friendly interface. This research was conducted as a mixed-methods study, utilizing a literature review, stakeholder interviews, and a potential pilot field trial in select districts to evaluate the implementation/ease of use, and utility of the application. The findings have shown that an informed decision and efficient postharvest management could help BongoAgro mitigate the spoilage by 20% and increase the farmer’s income by 10-15%. This paper shows how mobile-based interventions can be used to enhance the agricultural supply chain and improve the lifestyle of people living in developing economies. Mon, 01 Sep 2025 00:00:00 GMT https://ar.iub.edu.bd/handle/11348/1230 2025-09-01T00:00:00Z