Multimedia Coverage Research Articles

SHIFT FROM “ME” TO “WE” IN SOCIAL MEDIA

Currently media power is distributed via the multi-media World Wide Web. Web 2.0 has transformed every prosumer into an individual, mini-organism – “Me the Media” (the concept coined by Bloem, van Doorn & Duivestein 2009). Recently a trend has started to emerge, which indicates that Web conversations are creating new power relationships. This is especially vivid in the current multi-media coverage of political events, supported by cross-cultural social activism. Thus, the aim of this study is to analyse the emerging new trends in current social media that embody the shift from “Me” to “We” in power relationships. The idea that everyone is inter-linked and inter-active on the Web, involving not only common citizens and politicians, but also companies or brands, supports the finding that “We the Media” is the next development in social media, which needs to be taken seriously and investigated on a wider scale.

An Optimized Hidden Node Detection Paradigm for Improving the Coverage and Network Efficiency in Wireless Multimedia Sensor Networks.

Successful transmission of online multimedia streams in wireless multimedia sensor networks (WMSNs) is a big challenge due to their limited bandwidth and power resources. The existing WSN protocols are not completely appropriate for multimedia communication. The effectiveness of WMSNs varies, and it depends on the correct location of its sensor nodes in the field. Thus, maximizing the multimedia coverage is the most important issue in the delivery of multimedia contents. The nodes in WMSNs are either static or mobile. Thus, the node connections change continuously due to the mobility in wireless multimedia communication that causes an additional energy consumption, and synchronization loss between neighboring nodes. In this paper, we introduce an Optimized Hidden Node Detection (OHND) paradigm. The OHND consists of three phases: hidden node detection, message exchange, and location detection. These three phases aim to maximize the multimedia node coverage, and improve energy efficiency, hidden node detection capacity, and packet delivery ratio. OHND helps multimedia sensor nodes to compute the directional coverage. Furthermore, an OHND is used to maintain a continuous node– continuous neighbor discovery process in order to handle the mobility of the nodes. We implement our proposed algorithms by using a network simulator (NS2). The simulation results demonstrate that nodes are capable of maintaining direct coverage and detecting hidden nodes in order to maximize coverage and multimedia node mobility. To evaluate the performance of our proposed algorithms, we compared our results with other known approaches.

Rotational Wireless Video Sensor Networks with Obstacle Avoidance Capability for Improving Disaster Area Coverage

Wireless Video Sensor Networks (WVSNs) have become a leading solution in many important applications, such as disaster recovery. By using WVSNs in disaster scenarios, the main goal is achieving a successful immediate response including search, location, and rescue operations. The achievement of such an objective in the presence of obstacles and the risk of sensor damage being caused by disasters is a challenging task. In this paper, we propose a fault tolerance model of WVSN for efficient post-disaster management in order to assist rescue and preparedness operations. To get an overview of the monitored area, we used video sensors with a rotation capability that enables them to switch to the best direction for getting better multimedia coverage of the disaster area, while minimizing the effect of occlusions. By constructing different cover sets based on the field of view redundancy, we can provide a robust fault tolerance to the network. We demonstrate by simulating the benefits of our proposal in terms of reliability and high coverage.

Achieving high uptake of human papillomavirus vaccine in Cameroon: Lessons learned in overcoming challenges

BackgroundCameroon has the highest age-standardized incidence rate of cervical cancer (30/100,000 women) in Central Africa. In 2010–2011, the Cameroon Baptist Convention Health Services (CBCHS) received donated human papillomavirus (HPV) vaccine, Gardasil, from Merck & Co. Inc. through Axios Healthcare Development to immunize 6400 girls aged 9–13 years. The aim was to inform the Cameroon Ministry of Health (MOH) of the acceptability, feasibility, and optimal delivery strategies for HPV vaccine. Methods and findingsFollowing approval by the MOH, CBCHS nurses educated girls, parents, and communities about HPV, cervical cancer, and HPV vaccine through multimedia coverage, brochures, posters, and presentations. Because educators were initially reluctant to allow immunization in schools, due to fear of adverse events, the nurses performed 40.7% of vaccinations in the clinics, 34.5% in community venues, and only 24.7% in schools. When no adverse events were reported, more schools and communities permitted HPV vaccine immunization on their premises. To recover administrative costs, CBCHS charged a fee of US$8 per 3-dose series only to those who were able to pay. Despite the fee, 84.6% of the 6,851 girls who received the first dose received all three doses. Conclusions and lessons learnedWith adequate education of all stakeholders, HPV vaccination is acceptable and feasible in Cameroon. Following this demonstration project, in 2014 the Global Access to Vaccines and Immunization (GAVI) Alliance awarded the Cameroon MOH HPV vaccine at a price of US$4.50 per dose to immunize sixth grade girls and girls aged 10 years who are not in school in two districts of Cameroon.

Coverage Optimization of Occlusion-Free Surveillance for Video Sensor Networks

针对监控区域存在障碍物的情况,从无线视频传感节点的有向感知特性出发,讨论了视频传感器网络覆盖效果与监控区域之间的相互关系.在此基础上,定义了视频传感器网络的无盲区覆盖模型.基于虚拟势场的工作原理,提出了一种适用于无盲区覆盖模型的覆盖率动态优化算法PFOFSA(potential field based occlusion-free surveillance algorithm).设计了PFOFSA 中虚拟力的相互作用方法与监控节点运动规则,通过监控区域、重叠区域和遮挡区域之间的相互作用,逐步消除网络中的感知重叠区和盲区,优化视频无线传感器网络的覆盖率.最后,通过一系列的仿真实验分析了不同监控区域参数对PFOFSA 算法的影响,验证了算法的有效性.;This paper studies the problem of surveillance area of WVSN (wireless video sensor network) with obstacles, which is finding the optimized view-orientations for all video sensors to maximize multimedia coverage. In this paper, the characteristics of direction adjustable sensing model are discussed and the relation between sensors and obstacles is analyzed. Then, a coverage enhancement algorithm PFOFSA (potential field based occlusion-free surveillance algorithm) is proposed, which could effectively minimize the negative effect of occlusion and overlapping in the sensing field. In PFOFSA, three kinds of virtual centroid point are defined for simplifying the structure of effective region, occlusion region and overlapping region. Two kinds of relationship between virtual force and orientation rotation are constructed and made comparison in experiments. Finally, a set of simulation results are performed to demonstrate the effectiveness of PFOFSA. According to the experiments, PFOFSA could maximize the coverage of WVSN with obstacles and make higher coverage rate than other algorithms.

Participation rates and gross revenue vs. promotion and exposure: Advertisement and multimedia coverage of 18 sports within NCAA Division I athletic department websites

Athletic department websites have become a centerpiece of institutional athletic marketing efforts. Every Division I NCAA athletic department currently has a website, and these websites have become a significant element in communication brand-building efforts ( NCAA Members, 2006). A primary benefit of athletic department websites is the ability to promote their overall product through the provision of equitable coverage to each of the teams housed within their department through individual team pages. The purpose of this study was to identify the advertisement and multimedia coverage of individual teams on NCAA Division I intercollegiate athletic home websites and contrast the coverage with participation rates and team gross revenue. Twenty Division I (10 programs [FBS]; 10 programs [FCS]) athletic websites were selected based on sport offerings, and data were gathered during three weeks of each of the three sport seasons (Fall, Winter, and Spring) featured during the academic school year ( N = 420). Overall, from an equity perspective, the results demonstrated that men's and women's basketball, and football received significantly more multimedia and promotional coverage when in comparison to the teams that received negative coverage differences. In contrast, when analyzing the coverage from a financial standpoint, the results confirmed that football was underrepresented.

Self-orienting wireless multimedia sensor networks for occlusion-free viewpoints

Wireless multimedia sensor networks (WMSN) are formations of a large number of compact form-factor computing devices that can capture multimedia content, such as video and audio, and communicate them over wireless channels. The efficiency of a WMSN heavily depends on the correct orientation (i.e., view) of its individual sensory units in the field. In this paper, we study the problem of self-orientation in WMSN, that is finding the most beneficial orientation for all multimedia sensors to maximize multimedia coverage. We propose a new algorithm to determine a node’s multimedia coverage and find the sensor orientation that minimizes the negative effect of occlusions and overlapping regions in the sensing field. Our approach enables multimedia sensor nodes to compute their directional coverage leading to an efficient and self-configurable sensor orientation calculation. By using simulations, we show that the occlusion-free viewpoint approach increases the multimedia coverage significantly. The self-orientation methodology is designed in the form of a distributed algorithm, making it a suitable candidate for deployment in practical systems.

Digital journalism: emerging media and the changing horizons of journalism

Chapter 1 Preface Chapter 2 Digital Journalism: Views from the Horizon Chapter 3 The History of Online Journalism Chapter 4 The Meanings and Implications of Convergence Chapter 5 New Technology and News Flows: Journalism and Crisis Coverage Chapter 6 Digital Photojournalism Chapter 7 Satellites, the Internet, and Journalism Chapter 8 Social Movements and the Net: Activist Journalism Goes Digital Chapter 9 Digital Government and an Informatics of Governing: Remediating the Relationship between Citizens and their Government Chapter 10 Online Medical Communication among Peers: The Net and Alternatives to Traditional Journalism Chapter 11 Conclusion Chapter 12 Multimedia Coverage: A Case Study and Exercise

Multimedia coverage of organismal diversity in freshman biology at Clemson University

At Clemson University in the fall of 1994, spring of 1995 and the spring of 1996, HyperStudio multimedia modules were used to teach the portion of freshman biology dealing with "diversity" (the different types of animals, plants and microorganisms in the living world). Working individually in our AV center, the students completed the modules outside of class. This experiment saved much class time, and instructional results were positive. This paper discusses this project's methods, problems and results