The F@ Framework of Designing Awareness Mechanisms in Instant Messaging

This paper presents our research on awareness support in Instant Messaging (IM). The paper starts with a brief overview of empirical study of IM, using an online survey and face-to-face interviews to identify user needs for awareness support. The study identified a need for supporting four aspects of awareness, awareness of multiple concurrent conversations, conversational awareness, presence awareness of a group conversation, and visibility of moment-to-moment listeners and viewers. Based on the empirical study and existing research on awareness, we have developed the F@ (read as fat) framework of awareness. F@ comprises of the abstract level and the concrete level. The former includes an in-depth description of various awareness aspects in IM, whilst the latter utilises temporal logic to formalise fundamental time-related awareness aspects. F@ helps developers gain a better understanding of awareness and thereby design usable mechanisms to support awareness. Applying F@, we have designed several mechanisms to support various aspect of awareness in IM

Integration of Action and Language Knowledge: A Roadmap for Developmental Robotics

“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.”This position paper proposes that the study of embodied cognitive agents, such as humanoid robots, can advance our understanding of the cognitive development of complex sensorimotor, linguistic, and social learning skills. This in turn will benefit the design of cognitive robots capable of learning to handle and manipulate objects and tools autonomously, to cooperate and communicate with other robots and humans, and to adapt their abilities to changing internal, environmental, and social conditions. Four key areas of research challenges are discussed, specifically for the issues related to the understanding of: 1) how agents learn and represent compositional actions; 2) how agents learn and represent compositional lexica; 3) the dynamics of social interaction and learning; and 4) how compositional action and language representations are integrated to bootstrap the cognitive system. The review of specific issues and progress in these areas is then translated into a practical roadmap based on a series of milestones. These milestones provide a possible set of cognitive robotics goals and test scenarios, thus acting as a research roadmap for future work on cognitive developmental robotics.Peer reviewe

Flight Avionics Hardware Roadmap

As part of NASA's Avionics Steering Committee's stated goal to advance the avionics discipline ahead of program and project needs, the committee initiated a multi-Center technology roadmapping activity to create a comprehensive avionics roadmap. The roadmap is intended to strategically guide avionics technology development to effectively meet future NASA missions needs. The scope of the roadmap aligns with the twelve avionics elements defined in the ASC charter, but is subdivided into the following five areas: Foundational Technology (including devices and components), Command and Data Handling, Spaceflight Instrumentation, Communication and Tracking, and Human Interfaces

Overlap and Discourse Markers in Multi-Party Synchronous Voice-Based Computer-Mediated Communication

This thesis investigates the relevance of discourse markers (DM) to overlapping talk produced in synchronous voice-based computer-mediated communication (SVCMC). During the COVID-19 pandemic, SVCMC has become a popular form of communication. It is notorious for its dependency on technological variables and its vulnerability to overlap, and conversation analysts agree that avoiding overlap is one of the primary goals of the human turn-taking system. Since avoiding overlap is difficult in SVCMC, and DMs can contribute to turn-taking, the question is if DMs can help the speakers to avoid and resolve overlap in SVCMC. The purpose of the present study is to examine the conversational environment of SVCMC and the use of DMs in terms of turn-taking and Schegloff’s overlap resolution device (ORD). There is an evident scarcity of modern SVCMC corpora. Therefore, an SVCMC corpus containing the transcripts of a Dungeons & Dragons role-playing session was compiled. There are five speakers in the corpus: two native speakers of American English and three speakers of English as a foreign language. Methodologically, corpus-illustrated linguistics is applied to the data to exemplify the technological variables, the occurrences of overlap, and the use of DMs within the SVCMC transcripts. Based on the analysis, this thesis argues that multi-party SVCMC conversations take place in a unique conversational environment defined by technological variables including the volume level of the speakers, hardware issues, the lack of physical co-presence, and delay. They hamper SVCMC, contributing to its vulnerability to overlap. However, the transcripts illustrate that SVCMC speakers can utilise turn-initial, turn-medial, and turn-final DMs to manage turn-taking and to resolve problematic overlap. DMs as turn-initial turn-takers help the speakers recognise the risk of overlapping talk, and DMs as turn-final turn-yielders show to the overlapping speakers where their turns end. Furthermore, this study claims that DM combinations, DMs as markers of incipient speakership, and repeated DMs can contribute to resolving problematic overlap, and hence added to Schegloff’s ORD. As such, this thesis provides preliminary findings on how SVCMC speakers adapt to the overlap-related constraints of SVCMC environments linguistically. They are based on a single corpus, and future research should confirm or challenge them. Potential areas of interest are the differences between native and non-native uses of DMs, the frequency of DMs in SVCMC, and SVCMC settings different from a roleplaying session. Furthermore, the horizons should be broadened by monitoring the effects of the technological variables and by studying hybrid forms of CMC consisting of audio-visual and textual elements

Instant messaging in work-based virtual teams: the analysis of non-verbal communication used for the contextualisation of transactional and relational communicative goals

In this thesis, I use a multi-perspectival analytical approach to investigate the paralanguage of naturally occurring work-based Instant Message conversations. My research into the field of computer-mediated discourse analysis (CMDA) has shown that written non-verbal cues have been considered as important means of contextualising text-based computer-mediated communication (CMC), yet their scholarly treatment has been scant. Previous findings about the importance paralanguage in CMD have been further strengthened by the findings of the field of business communication: in the virtual work environment the lack of audio-visual information has been found to contribute to miscommunication and consequently hinder cooperation. The linguistic devices and discursive strategies that are used in order to compensate for the limitations imposed by the text-based communicative channel have therefore been identified as in need of further exploration. In this thesis, I have outlined a CMC cue system based on the previous findings of CMDA to investigate the range of cues used as non-verbal signals in workplace text- based CMC. I have also used a multi-perspectival approach based on the theoretical frameworks of interactional sociolinguistics, communities of practice, relational work and politeness and conversation analysis (CA) in order to investigate the range of interactional roles of paralanguage during computer-mediated business conversations. The interpretive CA-informed analysis I have conducted has provided evidence of the important role of non-verbal signals during the contextualisation of complex transactional and relational communicative goals in the workplace. The analysis in this thesis has provided two significant results: firstly, by incorporating the findings of research into paralanguage of spoken as well as other written genres it resulted in a comprehensive description of the orthographic and typographic non-verbal cues used in text-based CMC and, secondly, by drawing on the multi-perspectival framework, it allowed for a description of the complex interactional functions of these cues during the contextualisation of content and relational intent and the creation of interactional coherence in IM

CYCLIC GESTURES AND MULTIMODAL SYMBOLIC ASSEMBLIES: AN ARGUMENT FOR SYMBOLIC COMPLEXITY IN GESTURE

In this dissertation, I seek to better understand the nature of the relationship between meanings expressed in gesture and those expressed in speech. This research focuses on the use of cyclic gestures in English. Cyclic gestures are manual co-speech gestures that are characterized by a circular movement of the hand or arm. Despite cyclic gestures being commonplace in many types of spoken discourse, no previous studies to date have specifically explored the functions these gestures serve in English. Broadly, this dissertation addresses two questions: (1) What functions do cyclic gestures serve in interaction in English, and (2) how are cyclic gestures integrated with other meaningful units in multimodal expressions? Using data collected from television talk shows, I examine the functional-semantic properties of spoken language expressions that accompany cyclic gestures and identify properties of meaning that repeatedly align with the expression of the gestures. I also explore relationships between fine-grained formal properties of cyclic gestural expressions and functional-semantic properties of the co-expressed speech. The results of the study find a number of significant relationships between gesture forms and spoken language meanings. For example, when cyclic gestures were expressed with spoken constructions serving an evaluative function, they were significantly associated with bimanual asynchronous rotations and finger spreading (p \u3c .001) with a moderately strong effect size (φc = 0.26). Drawing on the patterns identified in the analysis of the data, I analyze cyclic gestures as component symbolic structures that profile schematic processes. I argue that formal properties that accompany cyclic movement gestures (e.g., handshapes and locations of the hands in space) have the potential to be meaningful. Data from English suggest that cyclic gestures can integrate simultaneously with other symbolic structures in gesture to form complex gestural expressions (i.e., symbolic assemblies). Extending theoretical tools from the framework of Cognitive Grammar (Langacker, 1987, 1991), I explore how the schematic meaning of cyclic gestures is instantiated in specific complex gestural expressions and how those gestural constructions interact with symbolic structures in speech. This work challenges traditional assumptions about the nature of gesture meaning, which treats gestures as simplex, holistic structures. Instead, the findings of this research suggest that gestures are best analyzed as constructions

Thermography of semiconductor lasers

Halbleiterlaser stellen mit über 70% Wirkungsgrad einzigartig effiziente Lichtquellen dar. Dennoch ist ihre zuverlässige Nutzung, insbesondere im Bereich hoher Leistungsdichten, von thermischen Limitierungen geprägt. Einen grundlegenden Beitrag zu deren physikalischen Verständnis leistet die Analyse der thermischen Eigenschaften und Degradationsprozesse solcher Bauelemente. In dieser Arbeit wird hierzu die Thermographie als innovative Analysemethode untersucht. Das Plancksche Strahlungsgesetz erlaubt die radiometrische Ermittlung der Temperatur. Die wichtige physikalische Kenngröße Emissivität wird in dieser Arbeit für Halbleiter und Halbleiterlaserstrukturen spektral gemessen und auf fundamentale physikalische Eigenschaften zurückgeführt. Auf dieser Grundlage werden methodische Aspekte der Thermographie diskutiert, welche durch den thermischen Hintergrund und die teilweise Transparenz der Halbleitermaterialien geprägt sind. Die daraus folgenden analytischen Fähigkeiten erlauben unter anderem die orts- und zeitaufgelöste Bestimmung der thermischen Eigenschaften von komplexen Hochleistungslasern unterschiedlichster Bauart. Darüber hinaus ermöglicht die Kenntnis der beteiligten thermischen Zeitkonstanten die Extraktion von lokalen Überhöhungen in der Infrarotemission, deren Zusammenhang zur Degradation der Bauelemente untersucht wird. Eine grundsätzliche Begrenzung der Ausgangsleistung ist durch einen abrupten Degradationsprozess gegeben, welcher maßgeblich durch eine Reabsorption der Laserstrahlung an der Frontfacette verursacht wird. Mithilfe einer kombinierten Thermographie-Nahfeld-Messung wird dieser Prozess orts- und zeitaufgelöst analysiert. Die Erweiterung des Messfensters zu kürzeren Wellenlängen hin erlaubt die Detektion strahlender Übergänge unter Einbeziehung von Defektzentren welche als strahlende Signaturen von graduellen Degradationsprozessen aufzufassen sind.Semiconductor lasers are unequaled efficient light sources, reaching efficiencies of more than 70%. Nevertheless, thermal limits govern their reliable application, in particular in the field of high power densities. The analysis of thermal properties and degradation processes in such devices contributes essentially to the understanding of these limits. This work exploits thermography as an innovative analytical technique for such purpose. Planck''s law allows for a radiometric detection of temperatures. In this work, the important physical parameter emissivity is measured spectrally resolved for both semiconductors and semiconductor laser structures and is related to fundamental physical properties. Based on that, methodological aspects are discussed, which are affected on the one hand by the omnipresent thermal radiation and on the other hand by the partial transparency of the semiconductor materials. The resulting analytical capacities allow, for instance, for the determination of the thermal properties of complex high-power lasers of a wide range of different designs in a spatio-temporally resolved fashion. Furthermore, does the knowledge of the involved thermal time constants allow for an extraction of localized peaks of the infrared emission that is analyzed for its relationship with device degradation. The output power of high-power devices is fundamentally limited by the catastrophic optical damage, an abrupt degradation process that is induced significantly by reabsorption of laser radiation at the front facet. This process is analyzed spatio-temporally resolved with help of a combined thermography and optical near-field technique. Extending the detection range down to shorter wavelengths allows for imaging of radiative transitions that are related to defect centers, which are interpreted as radiative signatures of gradual device degradation processes