384 research outputs found
LifeLogging: personal big data
We have recently observed a convergence of technologies to foster the emergence of lifelogging as a mainstream activity. Computer storage has become significantly cheaper, and advancements in sensing technology allows for the efficient sensing of personal activities, locations and the environment. This is best seen in the growing popularity of the quantified self movement, in which life activities are tracked using wearable sensors in the hope of better understanding human performance in a variety of tasks. This review aims to provide a comprehensive summary of lifelogging, to cover its research history, current technologies, and applications. Thus far, most of the lifelogging research has focused predominantly on visual lifelogging in order to capture life details of life activities, hence we maintain this focus in this review. However, we also reflect on the challenges lifelogging poses to an information retrieval scientist. This review is a suitable reference for those seeking a information retrieval scientist’s perspective on lifelogging and the quantified self
The audio notebook : paper and pen interaction with structured speech
Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1997.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (leaves 143-150).Lisa Joy Stifelman.Ph.D
Accessing spoken interaction through dialogue processing [online]
Zusammenfassung
Unser Leben, unsere Leistungen und unsere Umgebung, alles wird
derzeit durch Schriftsprache dokumentiert. Die rasante
Fortentwicklung der technischen Möglichkeiten Audio, Bilder und
Video aufzunehmen, abzuspeichern und wiederzugeben kann genutzt
werden um die schriftliche Dokumentation von menschlicher
Kommunikation, zum Beispiel Meetings, zu unterstützen, zu
ergänzen oder gar zu ersetzen. Diese neuen Technologien können
uns in die Lage versetzen Information aufzunehmen, die
anderweitig verloren gehen, die Kosten der Dokumentation zu
senken und hochwertige Dokumente mit audiovisuellem Material
anzureichern. Die Indizierung solcher Aufnahmen stellt die
Kerntechnologie dar um dieses Potential auszuschöpfen. Diese
Arbeit stellt effektive Alternativen zu schlüsselwortbasierten
Indizes vor, die Suchraumeinschränkungen bewirken und teilweise
mit einfachen Mitteln zu berechnen sind.
Die Indizierung von Sprachdokumenten kann auf verschiedenen
Ebenen erfolgen: Ein Dokument gehört stilistisch einer
bestimmten Datenbasis an, welche durch sehr einfache Merkmale
bei hoher Genauigkeit automatisch bestimmt werden kann.
Durch diese Art von Klassifikation kann eine Reduktion des
Suchraumes um einen Faktor der Größenordnung 410 erfolgen. Die
Anwendung von thematischen Merkmalen zur Textklassifikation
bei einer Nachrichtendatenbank resultiert in einer Reduktion um
einen Faktor 18. Da Sprachdokumente sehr lang sein können müssen
sie in thematische Segmente unterteilt werden. Ein neuer
probabilistischer Ansatz sowie neue Merkmale (Sprecherinitia
tive und Stil) liefern vergleichbare oder bessere Resultate als
traditionelle schlüsselwortbasierte Ansätze. Diese thematische
Segmente können durch die vorherrschende Aktivität
charakterisiert werden (erzählen, diskutieren, planen, ...),
die durch ein neuronales Netz detektiert werden kann. Die
Detektionsraten sind allerdings begrenzt da auch Menschen
diese Aktivitäten nur ungenau bestimmen. Eine maximale
Reduktion des Suchraumes um den Faktor 6 ist bei den verwendeten
Daten theoretisch möglich. Eine thematische Klassifikation
dieser Segmente wurde ebenfalls auf einer Datenbasis
durchgeführt, die Detektionsraten für diesen Index sind jedoch
gering.
Auf der Ebene der einzelnen Äußerungen können Dialogakte wie
Aussagen, Fragen, Rückmeldungen (aha, ach ja, echt?, ...) usw.
mit einem diskriminativ trainierten Hidden Markov Model erkannt
werden. Dieses Verfahren kann um die Erkennung von kurzen Folgen
wie Frage/AntwortSpielen erweitert werden (Dialogspiele).
Dialogakte und spiele können eingesetzt werden um
Klassifikatoren für globale Sprechstile zu bauen. Ebenso
könnte ein Benutzer sich an eine bestimmte Dialogaktsequenz
erinnern und versuchen, diese in einer grafischen
Repräsentation wiederzufinden.
In einer Studie mit sehr pessimistischen Annahmen konnten
Benutzer eines aus vier ähnlichen und gleichwahrscheinlichen
Gesprächen mit einer Genauigkeit von ~ 43% durch eine graphische
Repräsentation von Aktivität bestimmt.
Dialogakte könnte in diesem Szenario ebenso nützlich sein, die
Benutzerstudie konnte aufgrund der geringen Datenmenge darüber
keinen endgültigen Aufschluß geben. Die Studie konnte allerdings
für detailierte Basismerkmale wie Formalität und
Sprecheridentität keinen Effekt zeigen.
Abstract
Written language is one of our primary means for documenting our
lives, achievements, and environment. Our capabilities to
record, store and retrieve audio, still pictures, and video are
undergoing a revolution and may support, supplement or even
replace written documentation. This technology enables us to
record information that would otherwise be lost, lower the cost
of documentation and enhance highquality documents with
original audiovisual material.
The indexing of the audio material is the key technology to
realize those benefits. This work presents effective
alternatives to keyword based indices which restrict the search
space and may in part be calculated with very limited resources.
Indexing speech documents can be done at a various levels:
Stylistically a document belongs to a certain database which can
be determined automatically with high accuracy using very simple
features. The resulting factor in search space reduction is in
the order of 410 while topic classification yielded a factor
of 18 in a news domain.
Since documents can be very long they need to be segmented into
topical regions. A new probabilistic segmentation framework as
well as new features (speaker initiative and style) prove to be
very effective compared to traditional keyword based methods. At
the topical segment level activities (storytelling, discussing,
planning, ...) can be detected using a machine learning approach
with limited accuracy; however even human annotators do not
annotate them very reliably. A maximum search space reduction
factor of 6 is theoretically possible on the databases used. A
topical classification of these regions has been attempted
on one database, the detection accuracy for that index, however,
was very low.
At the utterance level dialogue acts such as statements,
questions, backchannels (aha, yeah, ...), etc. are being
recognized using a novel discriminatively trained HMM procedure.
The procedure can be extended to recognize short sequences such
as question/answer pairs, so called dialogue games.
Dialog acts and games are useful for building classifiers for
speaking style. Similarily a user may remember a certain dialog
act sequence and may search for it in a graphical
representation.
In a study with very pessimistic assumptions users are able to
pick one out of four similar and equiprobable meetings correctly
with an accuracy ~ 43% using graphical activity information.
Dialogue acts may be useful in this situation as well but the
sample size did not allow to draw final conclusions. However the
user study fails to show any effect for detailed basic features
such as formality or speaker identity
Law student knowledge of legal interviewing: a case study of self-evaluation using video annotation
Video has long been used to support learner reflection in professional education programs in law, health, and education. Emerging video analysis tools offer learners the ability to highlight segments of video and focus their attention to specific moments or aspects of performance. These emerging tools afford opportunities for more systematic observation, analysis, and deliberate reflection on learner performance than was available previously. Expertise research has found that representative, rigorous tasks followed by immediate feedback and error correction constitute deliberate practice. Training environments that incorporate deliberate practice and emerging video annotation and analysis tools provide opportunities for learners pinpoint strengths and weaknesses in a systematic way. The purpose of this descriptive case study was to utilize a mixed method approach that would allow the identification and reveal the development of learner knowledge in an ill- structured professional domain. Data consisting of categorical, evaluative, and descriptive video annotations were collected from a legal interviewing and counseling course. Data were analyzed using Chi\u27s (1997) verbal analysis approach. Verbal analysis is a methodology for quantifying the qualitative coding of the content of verbal utterances. Results imply that verbal analysis may be a useful method for other ill-structured professional domains. While the concept of reflection remains ambiguous, the method demonstrated in this study also provides a means to analyze reflective artifacts to reveal the content or object of reflections. Finally, results suggest that it may be possible to evaluate the development of learner knowledge in ill-structured professional domains
Information Seeking in Context: Teachers' Content Selection during Lesson Planning Using the Shoah Foundation's Visual History Archive of Holocaust Survivor Testimony
This study explored the information seeking task of content selection. An integrative conceptual framework used existing models to examine the context and process of information seeking, evaluation, and selection. The conceptual framework incorporated three main elements of the information seeking process:
* The information need context,
* The information search process,
* Relevance criteria.
Among teachers' many duties are the creation, implementation, and revision of lesson plans. A subtask of lesson planning is content selection, which occurs when teachers seek outside content, such as readings or audio recordings, to incorporate into lesson plans. Content selection is seen here as a work-task-embedded information seeking process.
A qualitative study was implemented within the setting of a week-long professional development workshop, during which eight teachers used a custom software product that combined a lesson-planning module with an information retrieval (IR) system. The IR system provided access to a subset of the Shoah Foundation's Visual History Archive. Data types included interviews, fly-on-the-wall transcripts, transaction logs, relevance judgments, and lesson plans. Analysis combined inductive and deductive techniques, including start codes, constant comparison, emergent themes, and matrix analysis.
Findings depict associations among each component of the framework.
1. The information need context consists of five layers (Environment, Role, Person, Task, Information Source), each of which influences information search and relevance.
2. The ISP includes two cognitive-behavioral facets: Conceptualizing and Actualizing.
3. Relevance criteria are the situationally-driven embodiment of contextual elements that apply to information seeking.
These findings have theoretical and practical implications for information studies and education. For information studies, this study contributes to understanding of the ISP as contextual, cognitive, and interactive. Information need, while unobservable in its native form, can be depicted in enough detail to supply meaningful requirements for the design of information systems and processes. Content selection is a form of exploratory search, and this study's implications suggest that the "traditional" reference interview should be used as an interaction model during exploratory search. For education, this study extends the discourse about consequences of standards-based education for teacher practice and contributes to models of teacher planning as an iterative, cognitive process
Using multimedia microworlds to motivate and engage adult learners
As educational institutions come under increasing pressure from outside forces to restructure the way students learn, efforts are being made by researchers to find ways to assist students to learn through independent thought and to solve problems in a resource-based, self-paced environment. Such an environment needs to be sufficiently interesting and novel to motivate students who begin to use it, and to continue to engage them as they progress through it. This study has sought to identify what such a learning environment needs to encompass in order to motivate and engage adult learners so that they will not only want to use it, but use it extensively. Eight attributes of motivation and engagement were identified from the literature, these being: immersion; reflection; flow; collaboration; learner control; curiosity; fantasy; and challenge. A module in a finance unit traditionally viewed by the students as boring and unengaging was selected, and a review of student and content needs was conducted. An interactive learning environment in the form of a microworld with gaming elements was designed and developed to incorporate the eight learner effects, and this was then trialed with a small group of finance students. The trial forms the basis for this thesis. The study was conducted using a combination of ethnographic action research and grounded theory as these allowed the researcher to focus on a specific problem relevant to the actual situation and allowed patterns in observations to be detected. The study used descriptive methodology to report what actually happened whilst looking for relationships between design elements, with cross-sequential sampling overcoming the problems of mono-operation bias. The results from these data gathering exercises suggested that the eight learner effects did, in fact, contribute to motivation and engagement in varying degrees. The program represented the unit content in a multiplicity of ways, ensuring that the individual learning styles of the students were accommodated. The study showed that students adapted differing navigational methods to progress through the program, but having settled on a path tended not to deviate from that path throughout each phase of the program. The study also highlighted the fact that such an environment is probably more effective in promoting incidences of reflection and higher order thinking among collaborating students, although, with sufficient scaffolding elements built into the program, students working in isolation may achieve some of the same effects from collaboration with the program itself. Another effect of using the microworld was that students could relate their learning back to their everyday lives, as well as place themselves into the environment. These factors, combined with the gaming elements, created an environment that caused an increase in positive attitudes among both the male and the female students. The results of this research have many implications for the future design of interactive learning environments for adults. It is already well documented that adult learners like resource-based, self-paced learning that is available at their convenience, but this research has identified some of the elements necessary to motivate adult learners to use such a program, to maintain their interest in the content during the whole time they are using the program, and to create a desire to continue learning about the topic long after they have completed the program. There are several imperatives driving the development of interactive instructional multimedia in the university environment. Among them are increased numbers of students, a reduction in the available face-to-face teaching time, and a growing. number of students who are demanding a more flexible way of learning. The results of this study show that interactive multimedia is a viable option for this style of teaching and learning, but the design should incorporate certain elements and principles in order for the students to be motivated sufficiently to use it. These design elements are generalisable to the design of multimedia for a wide variety of courses and topics
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