The DIVE Laboratory

1995 ◽  
Vol 4 (4) ◽  
pp. 431-440
Author(s):  
Christer Carlsson ◽  
Kai-Mikael Jää-Aro
Keyword(s):  
Virtual Environments ◽  
Spatial Model ◽  
Collaborative Work ◽  
Human Interaction ◽  
Royal Institute ◽  
Research Projects ◽  
Virtual Reality System ◽  
Virtual Spaces ◽  
Mutual Awareness ◽  
Institute Of Technology

The Swedish multiinstitutional research program MultiG spawned a number of research projects concerned with telecommunication, telecollaboration, and telepresence. One of these projects is DIVE (Distributed Interactive Virtual Environments), a multiuser virtual reality system developed jointly by the Swedish Institute of Computer Science and the Royal Institute of Technology in Stockholm, Sweden. DIVE is used as the platform for research in collaborative work in virtual spaces. In cooperation with the universities of Lancaster, Manchester, and Nottingham, the DIVE group has developed a spatial model for interaction. In this model each participant defines subspaces for their presence and attention. The intersection of those subspaces provides for varying degrees of mutual awareness, which is presumed to support more natural human-human interaction in virtual environments.

Experimental Investigation of the Influence of Flow Obstacles on Post-Dryout Heat Transfer in an Annulus

2009 ◽  
Author(s):  
I. G. Anghel ◽  
H. Anglart ◽  
S. Hedberg ◽  
S. Rydstro¨m
Keyword(s):  
Heat Transfer ◽  
Current Approach ◽  
Experimental Setup ◽  
Royal Institute ◽  
Considerable Influence ◽  
Transfer Enhancement ◽  
Transient Conditions ◽  
Accuracy Of Measurements ◽  
Present Design ◽  
Institute Of Technology

This paper describes the experimental setup, instrumentation and procedures which have been developed in the thermal-hydraulic laboratory at the Royal Institute of Technology (KTH), Stockholm, Sweden, to perform new post-dryout heat transfer investigations in an annulus with flow obstacles. Previous investigations performed in the same laboratory indicated that flow obstacles had a considerable influence on the post-CHF heat transfer. The measured heat transfer enhancement was significantly under-predicted by existing models. However, the net effect of obstacles could not be deduced from the measurements, since reference - obstacle-free measurements - had not been performed. In addition, the number of thermocouples that could be installed inside the heated rod was limited to 8. These deficiencies have been removed in the current approach. Firstly, the present design of the test section allows for measurements both with and without flow obstacles. In this way the net effect of the obstacles will be captured. Secondly, a newly developed technique allowed the installation of 40 thermocouples inside of the heated rod. An additional 40 thermocouples have been installed on the external wall of the heated tube. Therefore, a significant improvement of the accuracy of measurements can be expected. The present arrangement of instrumentation is suitable to perform measurements of heat transfer under both steady-state and transient conditions.

scholarly journals Cognitive control and a sense of presence in virtual environments

2016 ◽  
Vol 9 (1) ◽  
pp. 5-20 ◽  
Author(s):  
B.B. Velichkovsky ◽  
A.N. Gusev ◽  
V.F. Vinogradova ◽  
O.A. Arbekova
Keyword(s):  
Cognitive Control ◽  
Virtual Environments ◽  
Psychological Factors ◽  
User Interaction ◽  
Individual Characteristics ◽  
Virtual Reality System ◽  
Sense Of Presence ◽  
Control Switch ◽  
The Individual ◽  
Different Levels

User interaction with a virtual reality system may be accompanied with a sense of presence, the illusion of reality of virtual environment. The emergence of a sense of presence is determined by both technological and psychological factors. The authors show that a sense of presence may depend on the individual characteristics of cognitive control, i.e. the system of metacognition providing cognitive system setting on the solution of specific problems in context. It was found that the expression of a feeling of presence may depend on the efficiency of the control switch functions, interference suppression and updating of working memory. At the same time, the dependence of the severity of the sense of presence on the effectiveness of cognitive control differs in virtual environments with different levels of immersion.

The Evolution of Collaborative Work

2011 ◽  
pp. 15-31 ◽  
Author(s):  
Tim Rahschulte
Keyword(s):  
Collaborative Work ◽  
Human Interaction ◽  
Organization Of Work ◽  
Over Time

Organizational designs and the organization of work have evolved over time, but the essence of collaboration has always been paramount, especially for organizations seeking efficiency, effectiveness, and survivability. Starting with a biblical reference, then reviewing animal pack mentality, and thoroughly detailing the innovativeness of human interaction, this chapter explores the evolution of collaborative work.

scholarly journals Mutual Capacity Building through North-South Collaboration Using Challenge-Driven Education

2019 ◽  
Vol 11 (24) ◽  
pp. 7236 ◽  
Author(s):  
Anna-Karin Högfeldt ◽  
Anders Rosén ◽  
Christine Mwase ◽  
Ann Lantz ◽  
Lena Gumaelius ◽  
...  
Keyword(s):  
Engineering Education ◽  
Social Values ◽  
Organizational Structures ◽  
Royal Institute ◽  
International Policy ◽  
Education Change ◽  
Global Challenges ◽  
New Knowledge ◽  
Institute Of Technology ◽  
The University

The urgent need for actions in the light of the global challenges motivates international policy to define roadmaps for education on all levels to step forward and contribute with new knowledge and competencies. Challenge-Driven Education (CDE) is described as an education for Sustainable Development (ESD) approach, which aims to prepare students to work with global challenges and to bring value to society by direct impact. This paper describes, evaluates and discusses a three-year participatory implementation project of Challenge-driven education (CDE) within the engineering education at the University of Dar es Salam, UDSM, which has been carried out in collaboration with the Royal Institute of Technology, KTH in Stockholm. Conclusions are drawn on crucial aspects for engineering education change through the lens of Activity Theory (AT), where CDE is brought forward as a motivating ESD initiative for engineering faculty and students. Furthermore participatory co-creation is notably useful as it aims to embrace social values among the participants. Also, traditional organizational structures will need to be continuously negotiated in the light of the integration of more open-ended approaches in education.

Training Teachers for E-Learning, Beyond ICT Skills Towards Lifelong Learning Requirements

2011 ◽  
pp. 83-95 ◽  
Author(s):  
Olga Díez
Keyword(s):  
Adult Education ◽  
Teacher Training ◽  
Blended Learning ◽  
Lifelong Learning ◽  
Virtual Environments ◽  
Teaching And Learning ◽  
Collaborative Work ◽  
Learning Design ◽  
Ict Skills ◽  
E Learning

This chapter describes an experience in teacher training for e-learning in the field of adult education. It takes into account the models offered by flexible lifelong learning as the proper way to develop training for teachers in service, considering the advantages of blended learning for the target audience. The chapter discusses the balance between mere ICT skills and pedagogical competences. In this context the learning design should always allow that the teachers in training integrate in their work ICT solutions that fit to the didactic objectives, renew teaching and learning methodology, facilitate communication, give place to creativity, and allow pupils to learn at their own pace. By doing so, they will be closer to the profile of a tutor online, as a practitioner who successfully takes advantages of the virtual environments for collaborative work and learning communication.

Communication of Speech Sounds by a Tactual Vocoder

1963 ◽  
Vol 6 (3) ◽  
pp. 207-222 ◽  
Author(s):  
J. M. Pickett ◽  
B. Horenstein Pickett
Keyword(s):  
Speech Perception ◽  
Energy Distribution ◽  
Frequency Analysis ◽  
Speech Signal ◽  
Frequency Region ◽  
Speech Communication ◽  
Royal Institute ◽  
Speech Transmission ◽  
Institute Of Technology ◽  
Speech Information

Tests of tactual speech perception were conducted using a special frequency-analyzing vocoder. The vocoder presented a running frequency analysis of speech mapped into a spatial array of tactual vibrations which were applied to the fingers of the receiving subject. Ten vibrators were used, one for each finger. The position of a vibrator represented a given frequency region of speech energy; the total range covered was 210 to 7 700 cps; all the vibrations had a frequency of 300 cps; the vibration amplitudes represented the energy distribution over the various frequencies. Discrimination and identification tests were performed with various sets of test vowels; consonant discrimination tests were performed with certain consonants including those that might be difficult to lipread. Performance with vowels appeared to be related to formant structure and duration as measured on the test vowels, and to tactual masking effects. Consonant discrimination was good between stops and continuants; consonant features of nasality, voicing, and affrication were also discriminated to some extent. It is concluded that the skin offers certain capacities for transmitting speech information which may be used to complement speech communication where only an impoverished speech signal is normally received. This research was conducted at the Speech Transmission Laboratory, Royal Institute of Technology, Stockholm, Sweden.

FGM Research Activities in Europe

MRS Bulletin ◽  
1995 ◽  
Vol 20 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Wolfgang A. Kaysser ◽  
Bernhard Ilschner
Keyword(s):  
Functionally Graded ◽  
Swiss Federal Institute ◽  
Research Projects ◽  
Graded Materials ◽  
Research Activities ◽  
Federal Institute ◽  
The Status ◽  
Institute Of Technology ◽  
The Individual ◽  
Application Fields

The application of functionally graded materials (FGM) principles is widespread in Europe, despite the lack of national or European programs coordinating the efforts of the individual institutions and researchers. In the following article, the status of research in Europe will be outlined by examples of research projects from various application fields. More detailed information on European FGM research is available from the proceedings of the FGM '94 symposium held in October 1994 in Lausanne, Switzerland. The symposium was organized by B. Ilschner through the Materials Department of the Swiss Federal Institute of Technology of Lausanne.

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