Generative AI-driven Semantic Communication Framework for NextG Wireless Network

This work designs a novel semantic communication (SemCom) framework for the next-generation wireless network to tackle the challenges of unnecessary transmission of vast amounts that cause high bandwidth consumption, more latency, and experience with bad quality of services (QoS). In particular, these challenges hinder applications like intelligent transportation systems (ITS), metaverse, mixed reality, and the Internet of Everything, where real-time and efficient data transmission is paramount. Therefore, to reduce communication overhead and maintain the QoS of emerging applications such as metaverse, ITS, and digital twin creation, this work proposes a novel semantic communication framework. First, an intelligent semantic transmitter is designed to capture the meaningful information (e.g., the rode-side image in ITS) by designing a domain-specific Mobile Segment Anything Model (MSAM)-based mechanism to reduce the potential communication traffic while QoS remains intact. Second, the concept of generative AI is introduced for building the SemCom to reconstruct and denoise the received semantic data frame at the receiver end. In particular, the Generative Adversarial Network (GAN) mechanism is designed to maintain a superior quality reconstruction under different signal-to-noise (SNR) channel conditions. Finally, we have tested and evaluated the proposed semantic communication (SemCom) framework with the real-world 6G scenario of ITS; in particular, the base station equipped with an RGB camera and a mmWave phased array. Experimental results demonstrate the efficacy of the proposed SemCom framework by achieving high-quality reconstruction across various SNR channel conditions, resulting in 93.45% data reduction in communication

The Development and Deployment of an Online Exam System A Web Application

The rapid advancements in computer technology and the internet’s acceptance in every aspect of our lives, particularly in recent years, have made students and instructors vital in the teaching and learning sector. Web-based studies have also brought about advances in the education area, and numerous applications have become widespread in this field. In this paper, we suggested an online test multiple-choice question assessment system for students called the Online Exam System (OES). This system may be used by any university, college, or institution that has a computerized education system. The OES can be used by teachers to administer quizzes. The system will calculate the participant’s performance based on his response, and the following question will be created based on the participant’s performance. After the examination, the system will display the results and offer feedback based on the participant’s request. Administrative control over the entire system is available. A teacher has authority over the question bank and is responsible for creating test schedules. Therefore, the project will be very helpful for the beginner and mid-level programming learners. And also, will give a proper guideline to the students who are willing to learn programming and introduce the users with competitive programming and problem-solving skills

Safeguarding human–wildlife cooperation

Human–wildlife cooperation occurs when humans and free-living wild animals actively coordinate their behavior to achieve a mutually beneficial outcome. These interactions provide important benefits to both the human and wildlife communities involved, have wider impacts on the local ecosystem, and represent a unique intersection of human and animal cultures. The remaining active forms are human–honeyguide and human–dolphin cooperation, but these are at risk of joining several inactive forms (including human–wolf and human–orca cooperation). Human–wildlife cooperation faces a unique set of conservation challenges, as it requires multiple components—a motivated human and wildlife partner, a suitable environment, and compatible interspecies knowledge—which face threats from ecological and cultural changes. To safeguard human–wildlife cooperation, we recommend: (i) establishing ethically sound conservation strategies together with the participating human communities; (ii) conserving opportunities for human and wildlife participation; (iii) protecting suitable environments; (iv) facilitating cultural transmission of traditional knowledge; (v) accessibly archiving Indigenous and scientific knowledge; and (vi) conducting long-term empirical studies to better understand these interactions and identify threats. Tailored safeguarding plans are therefore necessary to protect these diverse and irreplaceable interactions. Broadly, our review highlights that efforts to conserve biological and cultural diversity should carefully consider interactions between human and animal cultures. Please see AfricanHoneyguides.com/abstract-translations for Kiswahili and Portuguese translations of the abstract

Safeguarding human–wildlife cooperation

Human–wildlife cooperation occurs when humans and free-living wild animals actively coordinate their behavior to achieve a mutually beneficial outcome. These interactions provide important benefits to both the human and wildlife communities involved, have wider impacts on the local ecosystem, and represent a unique intersection of human and animal cultures. The remaining active forms are human–honeyguide and human–dolphin cooperation, but these are at risk of joining several inactive forms (including human–wolf and human–orca cooperation). Human–wildlife cooperation faces a unique set of conservation challenges, as it requires multiple components—a motivated human and wildlife partner, a suitable environment, and compatible interspecies knowledge—which face threats from ecological and cultural changes. To safeguard human–wildlife cooperation, we recommend: (i) establishing ethically sound conservation strategies together with the participating human communities; (ii) conserving opportunities for human and wildlife participation; (iii) protecting suitable environments; (iv) facilitating cultural transmission of traditional knowledge; (v) accessibly archiving Indigenous and scientific knowledge; and (vi) conducting long-term empirical studies to better understand these interactions and identify threats. Tailored safeguarding plans are therefore necessary to protect these diverse and irreplaceable interactions. Broadly, our review highlights that efforts to conserve biological and cultural diversity should carefully consider interactions between human and animal cultures

‘Sufferings Start from the Mothers’ Womb’: Vulnerabilities and Livelihood War of the Small-Scale Fishers of Bangladesh

Due to its deltaic geographical position and precarious socioeconomic and demographic conditions, Bangladesh is recognized worldwide for its exposure to recurring environmental hazards. Based on a 21-month long field study in two fishing villages that are characterized by distinct ecological settings and ethnic groups, this article examines the arrays of cross-scale environmental, social and institutional stressors that singly or cumulatively impact fishers’ livelihood well-being and generational poverty. Analysis of the vulnerabilities makes it clear that the degree to which poor fishers suffer from environmental stressors and calamities is determined not only by the frequency of abnormal events, but also by their internal capabilities of self-protection, resilience against those stressors, position in the social network and asset and resource ownership. Coastal and floodplain fishers identified cyclone and long-standing floods as strong drivers of poverty as their bundles of ‘safety net’ capital are usually disrupted or lost. For a majority of the fishers, income/day/family declines to as low as US$ 0.7–0.9. Fishers lack appropriate sets of endowments and entitlements that would allow them immediate buffer against livelihood stressors. Vulnerability here is intricately related to one’s socio-economic status; poor and ‘socially vulnerable’ ethnic fishers are concurrently ‘biologically vulnerable’ too. The corollary of multi-faceted stressors is that, poverty persists as an ever-increasing haunting presence that thousands of floodplain and coastal fishers of Bangladesh are forced to cope with. It is evident that nature-induced stressors exert ‘ratchet effects’ on fishers with low endowments who critically risk nutritional deprivation and social standing. Lucidly, most of the fishers are trapped in a form of ‘livelihood war’

‘Sufferings Start from the Mothers’ Womb’ : Vulnerabilities and Livelihood War of the Small-Scale Fishers of Bangladesh

Due to its deltaic geographical position and precarious socioeconomic and demographic conditions, Bangladesh is recognized worldwide for its exposure to recurring environmental hazards. Based on a 21-month long field study in two fishing villages that are characterized by distinct ecological settings and ethnic groups, this article examines the arrays of cross-scale environmental, social and institutional stressors that singly or cumulatively impact fishers’ livelihood well-being and generational poverty. Analysis of the vulnerabilities makes it clear that the degree to which poor fishers suffer from environmental stressors and calamities is determined not only by the frequency of abnormal events, but also by their internal capabilities of self-protection, resilience against those stressors, position in the social network and asset and resource ownership. Coastal and floodplain fishers identified cyclone and long-standing floods as strong drivers of poverty as their bundles of ‘safety net’ capital are usually disrupted or lost. For a majority of the fishers, income/day/family declines to as low as US$ 0.7–0.9. Fishers lack appropriate sets of endowments and entitlements that would allow them immediate buffer against livelihood stressors. Vulnerability here is intricately related to one’s socio-economic status; poor and ‘socially vulnerable’ ethnic fishers are concurrently ‘biologically vulnerable’ too. The corollary of multi-faceted stressors is that, poverty persists as an ever-increasing haunting presence that thousands of floodplain and coastal fishers of Bangladesh are forced to cope with. It is evident that nature-induced stressors exert ‘ratchet effects’ on fishers with low endowments who critically risk nutritional deprivation and social standing. Lucidly, most of the fishers are trapped in a form of ‘ livelihood war’.environmental vulnerability; natural calamity; livelihood well-being; livelihood war; small-scale fishing community; poverty; coping; Bangladesh

Design and analysis of performance parameters for achieving high efficient ITO/PEDOT:PSS/P3HT:PCBM/Al organic solar cell

In this study, we designed a highly efficient ITO/PEDOT:PSS/P3HT:PCBM/Al-based bulk heterojunction organic solar cell. We investigated the performance of various optical and electrical properties of the designed organic solar cells. We improved the power conversion efficiency by using appropriate materials in different layers of the organic solar cells and refractive index and lattice constant matching among the layers. GPVDM simulator was used for simulating various properties of the organic solar cells, such as current density, voltage density, fill factor, and power conversion efficiency. Various parameters of the active layer of the organic solar cells were varied for optimization. In addition, we analyzed the impact of the thickness of the active layer and device series resistance on the improvement of the power conversion efficiency of the organic solar cells. Maximum power conversion efficiency of 16.46% with a fill factor of 74.09% was obtained for a series resistance of 15 ohms. We observed an inversely proportional relationship between power conversion efficiency and series resistance. We optimized the value of the thickness of the active layer as 75 nm while designing the organic solar cells to achieve maximum power conversion efficiency. We strongly believe that the proposed organic solar cell model will play a significant role in achieving high PCE organic solar cells