Detecting Well-being in Digital Communities: An Interdisciplinary Engineering Approach for its Indicators

In this thesis, the challenges of defining, refining, and applying well-being as a progressive management indicator are addressed. This work\u27s implications and contributions are highly relevant for service research as it advances the integration of consumer well-being and the service value chain. It also provides a substantial contribution to policy and strategic management by integrating constituents\u27 values and experiences with recommendations for progressive community management

Detecting Well-being in Digital Communities: An Interdisciplinary Engineering Approach for its Indicators

In this thesis, the challenges of defining, refining, and applying well-being as a progressive management indicator are addressed. This work\u27s implications and contributions are highly relevant for service research as it advances the integration of consumer well-being and the service value chain. It also provides a substantial contribution to policy and strategic management by integrating constituents\u27 values and experiences with recommendations for progressive community management

12-Item Depression, Anxiety, And Stress Scales (Dass-12): Associations With Self-Report Measures, A Semi-Strcutured Interview, And Behavioral Tasks

To date, only one study has examined the psychometric properties of the 12-item depression, anxiety, and stress scales (DASS). Moreover, all psychometric studies conducted with the DASS-21 have focused narrowly on associations with semi-structured interviews and other relevant self-report measures. In order to address these limitations, I proposed to diversify the ways in which we examine the DASS instrument (for both the 12- and 21-item versions). First, I examined the extent to which the DASS instrument is able to predict responses to behavioral tasks and whether the DASS was able to produce hypothesized convergent and divergent relationships with relevant self-report measures. Second, I examined how well the DASS predicted diagnoses gleaned from semi-structured interviews. Third, I estimated the reliability of the DASS with Raykov\u27s reliability estimates and Cronbach\u27s alpha values. Results across these analyses suggest that the DASS-12 and DASS-21 possess acceptable psychometric properties when measuring general psychological distress. However, both instruments lacked compelling evidence for being able to account for symptoms of anxiety, depression and stress after factoring in general psychological distress. Recommendations such as revising DASS-items, generating new items, or simply using the total score are discussed in the context of a broader taxonomy of anxiety and mood disorders

Satellite-based communications security:A survey of threats, solutions, and research challenges

Satellite-based Communication (SATCOM) systems are gaining renewed momentum in Industry and Academia, thanks to innovative services introduced by leading tech companies and the promising impact they can deliver towards the global connectivity objective tackled by early 6G initiatives. On the one hand, the emergence of new manufacturing processes and radio technologies promises to reduce service costs while guaranteeing outstanding communication latency, available bandwidth, flexibility, and coverage range. On the other hand, cybersecurity techniques and solutions applied in SATCOM links should be updated to reflect the substantial advancements in attacker capabilities characterizing the last two decades. However, business urgency and opportunities are leading operators towards challenging system trade-offs, resulting in an increased attack surface and a general relaxation of the available security services. In this paper, we tackle the cited problems and present a comprehensive survey on the link-layer security threats, solutions, and challenges faced when deploying and operating SATCOM systems. Specifically, we classify the literature on security for SATCOM systems into two main branches, i.e., physical-layer security and cryptography schemes. Then, we further identify specific research domains for each of the identified branches, focusing on dedicated security issues, including, e.g., physical-layer confidentiality, anti-jamming schemes, anti-spoofing strategies, and quantum-based key distribution schemes. For each of the above domains, we highlight the most essential techniques, peculiarities, advantages, disadvantages, lessons learned, and future directions. Finally, we also identify emerging research topics whose additional investigation by Academia and Industry could further attract researchers and investors, ultimately unleashing the full potential behind ubiquitous satellite communications.</p

Advanced electro-optical imaging techniques

The papers presented at the symposium are given which deal with the present state of sensors, as may be applicable to the Large Space Telescope (LST) program. Several aspects of sensors are covered including a discussion of the properties of photocathodes and the operational imaging camera tubes

The structure and reactivity of heterogeneous surfaces and study of the geometry of surface complexes

Issued as Progress report, Project no. G-41-667 (continues G-41-653