Virtual reality interaction techniques
- Rorke, Michael, Bangay, Shaun D, Wentworth, Peter E
- Authors: Rorke, Michael , Bangay, Shaun D , Wentworth, Peter E
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432756 , vital:72897 , https://citeseerx.ist.psu.edu/document?repid=rep1type=pdfdoi=d0b11136ef6d2701e15cdda896bc5bfd0786752e
- Description: This paper addresses the problems associated with interaction in immersive virtual reality and makes recommendations as to how best to deal with these problems, thereby producing a usable virtual reality interactive environment. Immersive virtual reality means that the users are immersed or contained inside the environment in which they are working. For example, they are able to turn their heads and look around, as well as use their bodies to control the system. The work in progress involves a study of various virtual reality input devices, some designed and implemented as part of the project. Additionally, the paper describes a simple framework for separation of the interaction and application parts of a virtual reality system in order to facilitate an object ori-ented approach to the implementation of the recommendations, and to the building of future virtual reality applications which incorporate these ideas.
- Full Text:
- Date Issued: 1998
- Authors: Rorke, Michael , Bangay, Shaun D , Wentworth, Peter E
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432756 , vital:72897 , https://citeseerx.ist.psu.edu/document?repid=rep1type=pdfdoi=d0b11136ef6d2701e15cdda896bc5bfd0786752e
- Description: This paper addresses the problems associated with interaction in immersive virtual reality and makes recommendations as to how best to deal with these problems, thereby producing a usable virtual reality interactive environment. Immersive virtual reality means that the users are immersed or contained inside the environment in which they are working. For example, they are able to turn their heads and look around, as well as use their bodies to control the system. The work in progress involves a study of various virtual reality input devices, some designed and implemented as part of the project. Additionally, the paper describes a simple framework for separation of the interaction and application parts of a virtual reality system in order to facilitate an object ori-ented approach to the implementation of the recommendations, and to the building of future virtual reality applications which incorporate these ideas.
- Full Text:
- Date Issued: 1998
Visiview: a system for the visualization of multidimensional data
- Authors: Bangay, Shaun D
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433466 , vital:72972 , https://doi.org/10.1117/12.309530
- Description: Results generated by simulation of computer systems are often presented as a multi-dimensional data set, where the number of dimensions may be greater than 4 if sufficient system parameters are modelled. This paper describes a visualization system intended to assist in understanding the relationship between, and effect upon system behavior of, the different values of the system parameters. The system is applied to data that cannot be represented using a mesh or isosurface representation, and in general can only be represented as a cloud of points. The use of stereoscopic rendering and rapid interaction with the data are compared with regard to their value in providing insight into the nature of the data. A number of techniques are implemented for displaying projections of the data set with up to 7 dimensions, and for allowing intuitive manipulation of the remaining dimensions. In this way the effect of changes in one variable in the presence of a number of others can be explored. The use of these techniques, when applied to data from computer system simulation, results in an intuitive understanding of the effects of the system parameters on system behavior.
- Full Text:
- Date Issued: 1998
- Authors: Bangay, Shaun D
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433466 , vital:72972 , https://doi.org/10.1117/12.309530
- Description: Results generated by simulation of computer systems are often presented as a multi-dimensional data set, where the number of dimensions may be greater than 4 if sufficient system parameters are modelled. This paper describes a visualization system intended to assist in understanding the relationship between, and effect upon system behavior of, the different values of the system parameters. The system is applied to data that cannot be represented using a mesh or isosurface representation, and in general can only be represented as a cloud of points. The use of stereoscopic rendering and rapid interaction with the data are compared with regard to their value in providing insight into the nature of the data. A number of techniques are implemented for displaying projections of the data set with up to 7 dimensions, and for allowing intuitive manipulation of the remaining dimensions. In this way the effect of changes in one variable in the presence of a number of others can be explored. The use of these techniques, when applied to data from computer system simulation, results in an intuitive understanding of the effects of the system parameters on system behavior.
- Full Text:
- Date Issued: 1998
Vulnerability, irreplaceability and reserve selection for the elephant-impacted flora of the Addo National Elephant Park, Eastern Cape, South Africa
- Authors: Johnson, Catherine Fiona
- Date: 1998
- Subjects: Addo Elephant National Park (South Africa) , Veld plants -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4202 , http://hdl.handle.net/10962/d1003771 , Addo Elephant National Park (South Africa) , Veld plants -- South Africa -- Eastern Cape
- Description: The Addo Elephant National Park (AENP) is the only existing national park situated in succulent thicket. This unique veld type is endemic to the Eastern Cape, and forms an important centre of endemism for small succulents and geophytes which comprise the subdominant component of the vegetation. It is regarded as the most threatened vegetation type in the Eastern Cape, as much of it has been severely degraded by farming activities and its rate of regeneration is very low. Thus the AENP represents an important sanctuary for certain species. However, large herbivores, particularly elephants, pose a further threat to the vegetation, and areas from which elephants have been excluded in the park (botanical reserves) have been shown to be more speciesrich than the surrounding vegetation. Most elephant-impact studies have focussed on the large shrub component of the vegetation, and only preliminary studies have been done in AENP to date. As the elephant population continues to grow, there is pressure to utilise the botanical reserves to increase the amount of available grazing. It is thus important that the botanical reserve system be highly effective and efficient in terms of area. Existing botanical reserves were established ad hoc and are therefore not necessarily optimal in this regard. An iterative reserve-selection algorithm was used to maximise plant species conservation in the most efficient area.
- Full Text:
- Date Issued: 1998
- Authors: Johnson, Catherine Fiona
- Date: 1998
- Subjects: Addo Elephant National Park (South Africa) , Veld plants -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4202 , http://hdl.handle.net/10962/d1003771 , Addo Elephant National Park (South Africa) , Veld plants -- South Africa -- Eastern Cape
- Description: The Addo Elephant National Park (AENP) is the only existing national park situated in succulent thicket. This unique veld type is endemic to the Eastern Cape, and forms an important centre of endemism for small succulents and geophytes which comprise the subdominant component of the vegetation. It is regarded as the most threatened vegetation type in the Eastern Cape, as much of it has been severely degraded by farming activities and its rate of regeneration is very low. Thus the AENP represents an important sanctuary for certain species. However, large herbivores, particularly elephants, pose a further threat to the vegetation, and areas from which elephants have been excluded in the park (botanical reserves) have been shown to be more speciesrich than the surrounding vegetation. Most elephant-impact studies have focussed on the large shrub component of the vegetation, and only preliminary studies have been done in AENP to date. As the elephant population continues to grow, there is pressure to utilise the botanical reserves to increase the amount of available grazing. It is thus important that the botanical reserve system be highly effective and efficient in terms of area. Existing botanical reserves were established ad hoc and are therefore not necessarily optimal in this regard. An iterative reserve-selection algorithm was used to maximise plant species conservation in the most efficient area.
- Full Text:
- Date Issued: 1998
Wassy ye
- Habib Koite (lead singer, guitar, chorus, lyrics, composer), Baba Sissoko (n'goni, balafon), Abdoul W. Berthe (bass guitar, kamale n'goni), Souleymane Ann (drums, calebasse, chorus), Boubacar Sidibe (guitar, chorus, harmonica), Fanga Diawara, Mahame Cisse, Alhousseini Dicko (violon peuls, Malian instrument ensemble), Coutre-Jour, Putumayo World Music
- Authors: Habib Koite (lead singer, guitar, chorus, lyrics, composer) , Baba Sissoko (n'goni, balafon) , Abdoul W. Berthe (bass guitar, kamale n'goni) , Souleymane Ann (drums, calebasse, chorus) , Boubacar Sidibe (guitar, chorus, harmonica) , Fanga Diawara, Mahame Cisse, Alhousseini Dicko (violon peuls, Malian instrument ensemble) , Coutre-Jour, Putumayo World Music
- Date: 1998
- Subjects: Popular music , Popular music--Africa, West , Africa Mali Bamako f-ml
- Language: Bambara
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/131324 , vital:36559 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC51-04
- Description: Relaxed intimate vocal style accompanied by talking drum, guitar, bass, drum set, harmonica violon, calabash and balafon
- Full Text: false
- Date Issued: 1998
- Authors: Habib Koite (lead singer, guitar, chorus, lyrics, composer) , Baba Sissoko (n'goni, balafon) , Abdoul W. Berthe (bass guitar, kamale n'goni) , Souleymane Ann (drums, calebasse, chorus) , Boubacar Sidibe (guitar, chorus, harmonica) , Fanga Diawara, Mahame Cisse, Alhousseini Dicko (violon peuls, Malian instrument ensemble) , Coutre-Jour, Putumayo World Music
- Date: 1998
- Subjects: Popular music , Popular music--Africa, West , Africa Mali Bamako f-ml
- Language: Bambara
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/131324 , vital:36559 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC51-04
- Description: Relaxed intimate vocal style accompanied by talking drum, guitar, bass, drum set, harmonica violon, calabash and balafon
- Full Text: false
- Date Issued: 1998
Women's experience of abortion : a qualitative study
- Authors: Taylor, Gaye Lesley
- Date: 1998
- Subjects: Abortion , Abortion -- South Africa , Women -- Counseling of
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:708 , http://hdl.handle.net/10962/d1006522 , Abortion , Abortion -- South Africa , Women -- Counseling of
- Description: Abortion is an emotive topic that always raises strong feelings. The purpose of this study, however, is not to focus on the religious, political or moral questions surrounding abortion. Abortion is a reality and in South Africa, where it has only recently become legal, there is a need to have an understanding of the effects on women in order to provide counselling services. There is also a need to provide services for the many women who have had illegal terminations in the past. This study reviewed the most recent literature on the subject and the researcher takes the view that although the scientific literature states there is little long term psychological effect of abortion, the non-positivist literature which records women's experiences tells another story. Some of the problems with the scientific literature is that psychological effects are not defined and there may be political motivation for the study, ie. an attempt is made to prove that the health costs are not high for abortion because there is little long term effect. The researcher, however, feels this does a disservice to women who have had abortions because there is a failure to provide counselling services. Some members of the feminist movement also deserve criticism because in their haste to give women their rights they fail to allow a woman to thoroughly explore her options beforehand and to provide support services afterwards. The researcher, however, also identified a new theme in the literature which has been called a maturing of the feminist viewpoint that along with the right to abortion, women also have a right to the mixed feelings that go with making, what is for many, a very painful decision. There is a recognition that abortion is about loss and thus there is a corresponding need to acknowledge women's need to mourn and to provide services. The study does not include the experience of women who seek abortions for reasons of poverty. It also excludes the experience of women who have abortions as a result of rape, incest or harm to the foetus. It is a qualitative study and a non-probability sampling technique which comprised snowball and purposive methods was used to identify respondents. In-depth semi-structured interviews using a broad theme of questions were conducted with five respondents. The women were asked to tell the stories of their abortions: their and their partner's feelings before and after, how they decided and the actual experience. They were also asked to identify counselling requirements, what they found helpful and what would have helped. The literature and the findings support the researcher's view that women who find themselves with an unexpected pregnancy need an opportunity to objectively consider all their options, namely keeping the baby, adoption or abortion, and to have an objective counsellor assist them in vigorously considering these. If they decide on a termination they need to be given as much information as possible about the procedure and about how they are likely to feel. Afterwards counselling should be made available and women should be encouraged to use the service. They need to be assisted to explore all ways of coming to terms with it such as through dream work, dialogueing with the unborn child through a letter and for those with religious beliefs seeking absolution from the church. There is a great need for a Christian and other religious ministry in this regard. Self-help therapies such as support groups can also be helpful
- Full Text:
- Date Issued: 1998
- Authors: Taylor, Gaye Lesley
- Date: 1998
- Subjects: Abortion , Abortion -- South Africa , Women -- Counseling of
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:708 , http://hdl.handle.net/10962/d1006522 , Abortion , Abortion -- South Africa , Women -- Counseling of
- Description: Abortion is an emotive topic that always raises strong feelings. The purpose of this study, however, is not to focus on the religious, political or moral questions surrounding abortion. Abortion is a reality and in South Africa, where it has only recently become legal, there is a need to have an understanding of the effects on women in order to provide counselling services. There is also a need to provide services for the many women who have had illegal terminations in the past. This study reviewed the most recent literature on the subject and the researcher takes the view that although the scientific literature states there is little long term psychological effect of abortion, the non-positivist literature which records women's experiences tells another story. Some of the problems with the scientific literature is that psychological effects are not defined and there may be political motivation for the study, ie. an attempt is made to prove that the health costs are not high for abortion because there is little long term effect. The researcher, however, feels this does a disservice to women who have had abortions because there is a failure to provide counselling services. Some members of the feminist movement also deserve criticism because in their haste to give women their rights they fail to allow a woman to thoroughly explore her options beforehand and to provide support services afterwards. The researcher, however, also identified a new theme in the literature which has been called a maturing of the feminist viewpoint that along with the right to abortion, women also have a right to the mixed feelings that go with making, what is for many, a very painful decision. There is a recognition that abortion is about loss and thus there is a corresponding need to acknowledge women's need to mourn and to provide services. The study does not include the experience of women who seek abortions for reasons of poverty. It also excludes the experience of women who have abortions as a result of rape, incest or harm to the foetus. It is a qualitative study and a non-probability sampling technique which comprised snowball and purposive methods was used to identify respondents. In-depth semi-structured interviews using a broad theme of questions were conducted with five respondents. The women were asked to tell the stories of their abortions: their and their partner's feelings before and after, how they decided and the actual experience. They were also asked to identify counselling requirements, what they found helpful and what would have helped. The literature and the findings support the researcher's view that women who find themselves with an unexpected pregnancy need an opportunity to objectively consider all their options, namely keeping the baby, adoption or abortion, and to have an objective counsellor assist them in vigorously considering these. If they decide on a termination they need to be given as much information as possible about the procedure and about how they are likely to feel. Afterwards counselling should be made available and women should be encouraged to use the service. They need to be assisted to explore all ways of coming to terms with it such as through dream work, dialogueing with the unborn child through a letter and for those with religious beliefs seeking absolution from the church. There is a great need for a Christian and other religious ministry in this regard. Self-help therapies such as support groups can also be helpful
- Full Text:
- Date Issued: 1998
Wui
- TP Audiorama Orchestra (performers), Showbiz
- Authors: TP Audiorama Orchestra (performers) , Showbiz
- Date: 1998
- Subjects: Popular music , Popular music--Africa, West , Africa Cote d'Ivoire Abidjan f-iv
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/129601 , vital:36311 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC30-06
- Description: Ako music from Cote d'Ivoire performed by the TP Audiorama Orchestra, the first orchestra to develp this genre of Ivorian music
- Full Text: false
- Date Issued: 1998
- Authors: TP Audiorama Orchestra (performers) , Showbiz
- Date: 1998
- Subjects: Popular music , Popular music--Africa, West , Africa Cote d'Ivoire Abidjan f-iv
- Language: French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/129601 , vital:36311 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC30-06
- Description: Ako music from Cote d'Ivoire performed by the TP Audiorama Orchestra, the first orchestra to develp this genre of Ivorian music
- Full Text: false
- Date Issued: 1998
Zotto Style
- MC-Zotto (lead, vocal, rap, ragga), Lamso (rap, composition), Poupson (rap), Bouttas (ragga), David (rap, sing), Dene, Izebere (chorus), MALI K7 S.A.
- Authors: MC-Zotto (lead, vocal, rap, ragga) , Lamso (rap, composition) , Poupson (rap) , Bouttas (ragga) , David (rap, sing) , Dene, Izebere (chorus) , MALI K7 S.A.
- Date: 1998
- Subjects: Popular music , Popular music--Mali--1991-2000 , Rap (Music) , Africa Mali Bamako f-ml
- Language: English , French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/128586 , vital:36125 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC12-05
- Description: Rap songs about contempory issues, unity and peace
- Full Text: false
- Date Issued: 1998
- Authors: MC-Zotto (lead, vocal, rap, ragga) , Lamso (rap, composition) , Poupson (rap) , Bouttas (ragga) , David (rap, sing) , Dene, Izebere (chorus) , MALI K7 S.A.
- Date: 1998
- Subjects: Popular music , Popular music--Mali--1991-2000 , Rap (Music) , Africa Mali Bamako f-ml
- Language: English , French
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/128586 , vital:36125 , International Library of African Music, Rhodes University, Grahamstown, South Africa , SDC12-05
- Description: Rap songs about contempory issues, unity and peace
- Full Text: false
- Date Issued: 1998
‘Environment as Text’: Initial Insights into some Implications for Professional Development in Environmental Education
- Lotz-Sisitka, Heila, Robottom, Ian
- Authors: Lotz-Sisitka, Heila , Robottom, Ian
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/438744 , vital:73496 , xlink:href="https://www.ajol.info/index.php/sajee/article/view/137410"
- Description: This paper describes part of a current international research capacity-building project in South Africa. In the project a research-based approach to professional development is adopted, one in which participants develop detailed case studies relating to their own changing practices in environmental education. It is argued that such an approach is consistent with the highly contextual nature of the field of environmental education. The article describes a central three-day 'moment' in the project, drawing on this experience to consider a number of issues concerning participatory research and the role of case study in professional development.
- Full Text:
- Date Issued: 1998
- Authors: Lotz-Sisitka, Heila , Robottom, Ian
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/438744 , vital:73496 , xlink:href="https://www.ajol.info/index.php/sajee/article/view/137410"
- Description: This paper describes part of a current international research capacity-building project in South Africa. In the project a research-based approach to professional development is adopted, one in which participants develop detailed case studies relating to their own changing practices in environmental education. It is argued that such an approach is consistent with the highly contextual nature of the field of environmental education. The article describes a central three-day 'moment' in the project, drawing on this experience to consider a number of issues concerning participatory research and the role of case study in professional development.
- Full Text:
- Date Issued: 1998
Computer modelling of ore body formation by a multi-disciplinary approach : some initial results
- Rice, A
- Authors: Rice, A
- Date: 1988
- Language: English
- Type: Article
- Identifier: vital:6741 , http://hdl.handle.net/10962/d1007557
- Description: Reports on the initial efforts of a computational programme at Rhodes University in Cape Province, South Africa to model the formation of mineral deposits in the country. Initial results pertaining to the cooling of buried bodies of molten rock; Contribution to a better margin of success for South African mineral industries.
- Full Text:
- Date Issued: 1988
- Authors: Rice, A
- Date: 1988
- Language: English
- Type: Article
- Identifier: vital:6741 , http://hdl.handle.net/10962/d1007557
- Description: Reports on the initial efforts of a computational programme at Rhodes University in Cape Province, South Africa to model the formation of mineral deposits in the country. Initial results pertaining to the cooling of buried bodies of molten rock; Contribution to a better margin of success for South African mineral industries.
- Full Text:
- Date Issued: 1988