A CONCEPTUAL FRAMEWORK FOR MOBILE GROUP SUPPORT SYSTEMS

The rapid development of wireless communication and mobile devices has created a great opportunity to support mobile group coordination at a more efficient level than before. This article presents a framework for Mobile Group Support Systems (MGSS) that considers four dimensions: supporting whom, supporting what, where to support and how to support. A good MGSS design should take consideration with the characteristics of each dimension: the system should be able to support mobile users working jointly with members from multiple parties; using available and advanced mobile technology, the system should be able to support context freedom, context dependent, and ad hoc coordination under dynamic, uncertain, frequent disrupting, time and space stretched and fluid context. To meet these requirements, we discuss the issues related to three basic functions of MGSS: mobile communication, group coordination, and context awareness

Bitcoin Financial Regulation: Securities, Derivatives, Prediction Markets, and Gambling

The next major wave of Bitcoin regulation will likely be aimed at financial instruments, including securities and derivatives, as well as prediction markets and even gambling. While there are many easily regulated intermediaries when it comes to traditional securities and derivatives, emerging bitcoin denominated instruments rely much less on traditional intermediaries such as banks and securities exchanges. Additionally, the block chain technology that Bitcoin introduced for the first time makes completely decentralized markets and exchanges possible, thus eliminating the need for intermediaries in complex financial transactions. In this Article we survey the type of financial instruments and transactions that will most likely be of interest to regulators, including traditional securities and derivatives, new bitcoin-denominated instruments, and completely decentralized markets and exchanges. We find that Bitcoin derivatives would likely not be subject to the full scope of regulation under the Commodity Exchange Act to the extent that such derivatives involve physical delivery (as opposed to cash settlement) or are non-fungible and not independently traded. We also find that some laws, including those aimed at online gambling, do not contemplate a payment method like Bitcoin, thus placing many transactions in a legal gray area. Following the approach to virtual currencies taken by the Financial Crimes Enforcement Network, we argue that other financial regulators should consider exempting or excluding certain financial transactions denominated in Bitcoin from the full scope of their regulations, much like private securities offerings and forward contracts are treated. We also suggest that to the extent that regulation and enforcement becomes more costly than its benefits, policymakers should consider and pursue strategies consistent with that new reality, such as efforts to encourage resilience and adaptation by existing institutions

Quality of experience in telemeetings and videoconferencing: a comprehensive survey

Telemeetings such as audiovisual conferences or virtual meetings play an increasingly important role in our professional and private lives. For that reason, system developers and service providers will strive for an optimal experience for the user, while at the same time optimizing technical and financial resources. This leads to the discipline of Quality of Experience (QoE), an active field originating from the telecommunication and multimedia engineering domains, that strives for understanding, measuring, and designing the quality experience with multimedia technology. This paper provides the reader with an entry point to the large and still growing field of QoE of telemeetings, by taking a holistic perspective, considering both technical and non-technical aspects, and by focusing on current and near-future services. Addressing both researchers and practitioners, the paper first provides a comprehensive survey of factors and processes that contribute to the QoE of telemeetings, followed by an overview of relevant state-of-the-art methods for QoE assessment. To embed this knowledge into recent technology developments, the paper continues with an overview of current trends, focusing on the field of eXtended Reality (XR) applications for communication purposes. Given the complexity of telemeeting QoE and the current trends, new challenges for a QoE assessment of telemeetings are identified. To overcome these challenges, the paper presents a novel Profile Template for characterizing telemeetings from the holistic perspective endorsed in this paper

UNDERSTANDING NATURAL RESOURCE CONFLICTS AS CAUSES AND CONSEQUENCES OF THE TRANSITION TOWARDS ECOSYSTEM MANAGEMENT: A CASE STUDY OF THE SHAWNEE NATIONAL FOREST IN SOUTHERN ILLINOIS, USA

Since the 1980s, approaches to managing forest resources in the US and around the world have been shifting from the conventional sustained yield approach towards ecosystem management. Ecosystem management is a resource management paradigm that seeks to employ a collaborative and multidisciplinary approach to landscape scale conservation, as well as the integration of socio-economic and biophysical considerations with the overall goal of enhancing the health and resilience of coupled social-ecological systems. While the role of natural resource conflicts as drivers of the transition towards ecosystem management has received some research attention, the potential roles of ecosystem management in emerging natural resource conflicts have not been adequately explored. The effective implementation of ecosystem management requires adaptive governance mechanisms capable of integrating diverse stakeholder values and knowledge systems across scales. The absence of such institutional mechanisms could contribute to the emergence of wicked problems – a class of problems that defy clear definitions and definitive solutions. Using the Shawnee National Forest as a case study, the purpose of this qualitative study was to understand the role of natural resource conflicts in the transition towards ecosystem management, as well as the consequences of ecosystem management on emerging resource conflicts. The study also aimed to assess the extent to which the approaches and strategies used in managing natural resource conflicts meet the institutional requirements for managing wicked problems. In this regard, semi-structured interviews were conducted in 2021 among 24 key informants representing the US Forest Service and relevant stakeholder groups, such as environmental groups, recreationists, and local businesses. The interviews were preceded by a review of documents to understand the context of changing forest policies and evolving conflicts in the Shawnee National Forest since the 1980s. The data were analyzed with the NVivo software using a deductive coding approach. The results showed that the transition towards ecosystem-based forest management in the Shawnee National Forest was primarily triggered by conflicts between environmental groups and the US Forest Service over timber harvesting. Although the institutional framework for alternative dispute resolution existed at the time, these conflicts were largely managed through the national legal system. Since the transition to ecosystem management with the adoption of the 2006 Forest Plan, new conflicts have emerged, this time, mostly among various recreational groups. The lifting of the injunction on timber harvesting and the increased focus of the US Forest Service on active forest management as part of forest restoration efforts appear to have set the stage for the potential re-emergence of conflicts over timber harvesting. Regarding conflict management, the use of alternative conflict management techniques, such as negotiation and mediation have received increased attention since the adoption of the 2006 Forest Plan, although the effectiveness of these processes has been hampered by various institutional and attitudinal constraints, including conflicting procedural requirements, limited capacity, and lack of agency commitment towards meaningful stakeholder engagement. Meanwhile, the fear of lawsuits continues to shape forest management decisions on the Shawnee National Forest. These findings highlight the inadequacy of the national legal system in managing wicked problems and they highlight the need for investments in effective institutional mechanisms for conflict management, such as adaptive governance

Bitcoin Financial Regulation: Securities, Derivatives, Prediction Markets, and Gambling

The next major wave of Bitcoin regulation will likely be aimed at financial instruments, including securities and derivatives, as well as prediction markets and even gambling. While there are many easily regulated intermediaries when it comes to traditional securities and derivatives, emerging bitcoin-denominated instruments rely much less on traditional intermediaries such as banks and securities exchanges. Additionally, the block chain technology that Bitcoin introduced for the first time makes completely decentralized markets and exchanges possible, thus eliminating the need for intermediaries in complex financial transactions. In this Article we survey the type of financial instruments and transactions that will most likely be of interest to regulators, including traditional securities and derivatives, new bitcoin-denominated instruments, and completely decentralized markets and exchanges. We find that Bitcoin derivatives would likely not be subject to the full scope of regulation under the Commodity Exchange Act to the extent that such derivatives involve physical delivery (as opposed to cash settlement) or are non-fungible and not independently traded. We also find that some laws, including those aimed at online gambling, do not contemplate a payment method like Bitcoin, thus placing many transactions in a legal gray area. Following the approach to virtual currencies taken by the Financial Crimes Enforcement Network, we argue that other financial regulators should consider exempting or excluding certain financial transactions denominated in Bitcoin from the full scope of their regulations, much like private securities offerings and forward contracts are treated. We also suggest that to the extent that regulation and enforcement becomes more costly than its benefits, policymakers should consider and pursue strategies consistent with that new reality, such as efforts to encourage resilience and adaptation by existing institutions

Automatic Mobile Video Remixing and Collaborative Watching Systems

In the thesis, the implications of combining collaboration with automation for remix creation are analyzed. We first present a sensor-enhanced Automatic Video Remixing System (AVRS), which intelligently processes mobile videos in combination with mobile device sensor information. The sensor-enhanced AVRS system involves certain architectural choices, which meet the key system requirements (leverage user generated content, use sensor information, reduce end user burden), and user experience requirements. Architecture adaptations are required to improve certain key performance parameters. In addition, certain operating parameters need to be constrained, for real world deployment feasibility. Subsequently, sensor-less cloud based AVRS and low footprint sensorless AVRS approaches are presented. The three approaches exemplify the importance of operating parameter tradeoffs for system design. The approaches cover a wide spectrum, ranging from a multimodal multi-user client-server system (sensor-enhanced AVRS) to a mobile application which can automatically generate a multi-camera remix experience from a single video. Next, we present the findings from the four user studies involving 77 users related to automatic mobile video remixing. The goal was to validate selected system design goals, provide insights for additional features and identify the challenges and bottlenecks. Topics studied include the role of automation, the value of a video remix as an event memorabilia, the requirements for different types of events and the perceived user value from creating multi-camera remix from a single video. System design implications derived from the user studies are presented. Subsequently, sport summarization, which is a specific form of remix creation is analyzed. In particular, the role of content capture method is analyzed with two complementary approaches. The first approach performs saliency detection in casually captured mobile videos; in contrast, the second one creates multi-camera summaries from role based captured content. Furthermore, a method for interactive customization of summary is presented. Next, the discussion is extended to include the role of users’ situational context and the consumed content in facilitating collaborative watching experience. Mobile based collaborative watching architectures are described, which facilitate a common shared context between the participants. The concept of movable multimedia is introduced to highlight the multidevice environment of current day users. The thesis presents results which have been derived from end-to-end system prototypes tested in real world conditions and corroborated with extensive user impact evaluation

A Collaborative Access Control Model for Shared Items in Online Social Networks

The recent emergence of online social networks (OSNs) has changed the communication behaviors of thousand of millions of users. OSNs have become significant platforms for connecting users, sharing information, and a valuable source of private and sensitive data about individuals. While OSNs insert constantly new social features to increase the interaction between users, they, unfortunately, offer primitive access control mechanisms that place the burden of privacy policy configuration solely on the holder who has shared data in her/his profile regardless of other associated users, who may have different privacy preferences. Therefore, current OSN privacy mechanisms violate the privacy of all stakeholders by giving one user full authority over another’s privacy settings, which is extremely ineffective. Based on such considerations, it is essential to develop an effective and flexible access control model for OSNs, accommodating the special administration requirements coming from multiple users having a variety of privacy policies over shared items. In order to solve the identified problems, we begin by analyzing OSN scenarios where at least two users should be involved in the access control process. Afterward, we propose collaborative access control framework that enables multiple controllers of the shared item to collaboratively specify their privacy settings and to resolve the conflicts among co-controllers with different requirements and desires. We establish our conflict resolution strategy’s rules to achieve the desired equilibrium between the privacy of online users and the utility of sharing data in OSNs. We present a policy specification scheme for collaborative access control and authorization administration. Based on these considerations, we devise algorithms to achieve a collaborative access control policy over who can access or disseminate the shared item and who cannot. In our dissertation, we also present the implementation details of a proof-of-concept prototype of our approach to demonstrate the effectiveness of such an approach. With our approach, sharing and interconnection among users in OSNs will be promoted in a more trustworthy environment