Lessons Learned In The Global Deployment Of An Open Source Security Solution
- Authors: Irwin, Barry V W
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428830 , vital:72539 , https://digifors.cs.up.ac.za/issa/2004/Proceedings/Research/023.pdf
- Description: This paper covers the lessons learned, and the challenges facing the deployment of an Open Source derivative firewall and Virtual Private Network (VPN) solution into the established commercially driven Tele-communications arena. The lessons learned and issues discussed are drawn from the author’s own experiences having worked for a global Wireless Application Service Provider over a three year period. Focus is placed on the issues surrounding the integration of the open source equipment with that of the established global Telecommunications players, where compliance to existing network standards was a re-quirement for connectivity. Major stumbling blocks to the acceptance and success of the open source product were the concerns expressed by the Telecommunications Operators relating to interoperability and troubleshooting facilities when interfaced to their existing commercially available equipment and existing rigid telecommunications networks. The processes resulting in the initial decision to utilise an open source solution in preference to commercial offerings are also explored. An open source solution was found to offer higher flexibility and functionali-ty and greater return on investment whilst maintaining a significantly re-duced cost in comparison to commercial solutions available.
- Full Text:
- Date Issued: 2004
- Authors: Irwin, Barry V W
- Date: 2004
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428830 , vital:72539 , https://digifors.cs.up.ac.za/issa/2004/Proceedings/Research/023.pdf
- Description: This paper covers the lessons learned, and the challenges facing the deployment of an Open Source derivative firewall and Virtual Private Network (VPN) solution into the established commercially driven Tele-communications arena. The lessons learned and issues discussed are drawn from the author’s own experiences having worked for a global Wireless Application Service Provider over a three year period. Focus is placed on the issues surrounding the integration of the open source equipment with that of the established global Telecommunications players, where compliance to existing network standards was a re-quirement for connectivity. Major stumbling blocks to the acceptance and success of the open source product were the concerns expressed by the Telecommunications Operators relating to interoperability and troubleshooting facilities when interfaced to their existing commercially available equipment and existing rigid telecommunications networks. The processes resulting in the initial decision to utilise an open source solution in preference to commercial offerings are also explored. An open source solution was found to offer higher flexibility and functionali-ty and greater return on investment whilst maintaining a significantly re-duced cost in comparison to commercial solutions available.
- Full Text:
- Date Issued: 2004
The influence of education on the interpretation of pharmaceutical pictograms for communicating medicine instructions:
- Dowse, Roslind, Ehlers, Martina S
- Authors: Dowse, Roslind , Ehlers, Martina S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/157014 , vital:40079 , DOI 10.1211/002235702810
- Description: To assess the influence of formal education on the interpretation of pharmaceutical pictograms.
- Full Text:
- Date Issued: 2003
- Authors: Dowse, Roslind , Ehlers, Martina S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/157014 , vital:40079 , DOI 10.1211/002235702810
- Description: To assess the influence of formal education on the interpretation of pharmaceutical pictograms.
- Full Text:
- Date Issued: 2003
Extending the matching facilities of Linda
- Wells, George C, Chalmer, A B, Clayton, Peter G
- Authors: Wells, George C , Chalmer, A B , Clayton, Peter G
- Date: 2002
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430452 , vital:72692 , https://doi.org/10.1007/3-540-46000-4_34
- Description: This paper discusses the associative matching mechanism used in the Linda coordination language for the retrieval of data. There are a number of problems with this mechanism which are discussed in the light of the requirements of applications using Linda. A number of solutions to these problems have been proposed. These are discussed and compared with a new approach to solving these problems. The benefits and the limitations of the new approach are considered, showing how it provides a considerable improvement in this area.
- Full Text:
- Date Issued: 2002
- Authors: Wells, George C , Chalmer, A B , Clayton, Peter G
- Date: 2002
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430452 , vital:72692 , https://doi.org/10.1007/3-540-46000-4_34
- Description: This paper discusses the associative matching mechanism used in the Linda coordination language for the retrieval of data. There are a number of problems with this mechanism which are discussed in the light of the requirements of applications using Linda. A number of solutions to these problems have been proposed. These are discussed and compared with a new approach to solving these problems. The benefits and the limitations of the new approach are considered, showing how it provides a considerable improvement in this area.
- Full Text:
- Date Issued: 2002
Maybe the courts are not such a Bleak House after all - or please sir, I want some more copyright
- Authors: Glover, Graham B
- Date: 2002
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70841 , vital:29749 , https://heinonline.org/HOL/P?h=hein.journals/soaf119&i=101
- Description: In our advanced technological age the law of copyright faces tremendous challenges. In particular, the Internet has created serious problems for those who wish to enforce their proprietary rights, and to protect their textual (and other) creations from unregulated and uninhibited reproduction.
- Full Text: false
- Date Issued: 2002
- Authors: Glover, Graham B
- Date: 2002
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70841 , vital:29749 , https://heinonline.org/HOL/P?h=hein.journals/soaf119&i=101
- Description: In our advanced technological age the law of copyright faces tremendous challenges. In particular, the Internet has created serious problems for those who wish to enforce their proprietary rights, and to protect their textual (and other) creations from unregulated and uninhibited reproduction.
- Full Text: false
- Date Issued: 2002
Implementation and applications of the distortion operator
- Authors: Bangay, Shaun D
- Date: 2001
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433382 , vital:72966 , https://doi.org/10.1145/513867.513872
- Description: The distortion operator transforms 2D images in a manner similar to image warping or morphing, allowing source pixels to be mapped to any destination pixel. This operator can be implemented on current hardware, allowing at least one distortion per frame at interactive frame rates. Potential applications are numerous, but those described include re-mapping images for correct projection onto curved screens, correcting camera distortion from multiple sources simultaneously, and allowing constant time dynamic texturing and lighting of a static scene which is independent of geometric complexity.
- Full Text:
- Date Issued: 2001
- Authors: Bangay, Shaun D
- Date: 2001
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433382 , vital:72966 , https://doi.org/10.1145/513867.513872
- Description: The distortion operator transforms 2D images in a manner similar to image warping or morphing, allowing source pixels to be mapped to any destination pixel. This operator can be implemented on current hardware, allowing at least one distortion per frame at interactive frame rates. Potential applications are numerous, but those described include re-mapping images for correct projection onto curved screens, correcting camera distortion from multiple sources simultaneously, and allowing constant time dynamic texturing and lighting of a static scene which is independent of geometric complexity.
- Full Text:
- Date Issued: 2001
An investigation into factors influencing immersion in interactive virtual reality environments
- Bangay, Shaun D, Preston, Louise
- Authors: Bangay, Shaun D , Preston, Louise
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432864 , vital:72908 , https://pubmed.ncbi.nlm.nih.gov/10350927/
- Description: Two interactive virtual reality environments were used to identify factors that may affect, or be affected by, the degree of immersion in a virtual world. In particular, the level of stress in a "swimming with dolphins" simulation is measured, as is the degree of simulator sickness resulting form a virtual roller coaster. Analysis of the results indicates that a relationship between the degree of immersion and the following factors: excitement, comfort, quality and age. The following factors are found to depend on the degree of immersion: simulator sickness, control, excitement and desire to repeat the experience.
- Full Text:
- Date Issued: 1998
- Authors: Bangay, Shaun D , Preston, Louise
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432864 , vital:72908 , https://pubmed.ncbi.nlm.nih.gov/10350927/
- Description: Two interactive virtual reality environments were used to identify factors that may affect, or be affected by, the degree of immersion in a virtual world. In particular, the level of stress in a "swimming with dolphins" simulation is measured, as is the degree of simulator sickness resulting form a virtual roller coaster. Analysis of the results indicates that a relationship between the degree of immersion and the following factors: excitement, comfort, quality and age. The following factors are found to depend on the degree of immersion: simulator sickness, control, excitement and desire to repeat the experience.
- Full Text:
- Date Issued: 1998
An Investigation into the feasibility of Human Facial Modeling
- Panagou, Sotcri, Bangay, Shaun D
- Authors: Panagou, Sotcri , Bangay, Shaun D
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432711 , vital:72894 , https://citeseerx.ist.psu.edu/document?repid=rep1ype=pdfoi=c305c27d16322208e0e6815ca261d61019a4cbd0
- Description: In this paper, virtual videoconferencing is investigated. The goal of the project is to develop a cheap, realistic yet real-time 3D face-modeling tool using a number of camera feeds. Bandwidth utilisation can then be minimised by transferring only the actual model (and subsequently, changes to the model) of the actor's face. Using a virtual reality system, reconstruction of a human face is performed and transmitted, thereby reducing bandwidth requirements. The modeling process is discussed, with results.
- Full Text:
- Date Issued: 1998
- Authors: Panagou, Sotcri , Bangay, Shaun D
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/432711 , vital:72894 , https://citeseerx.ist.psu.edu/document?repid=rep1ype=pdfoi=c305c27d16322208e0e6815ca261d61019a4cbd0
- Description: In this paper, virtual videoconferencing is investigated. The goal of the project is to develop a cheap, realistic yet real-time 3D face-modeling tool using a number of camera feeds. Bandwidth utilisation can then be minimised by transferring only the actual model (and subsequently, changes to the model) of the actor's face. Using a virtual reality system, reconstruction of a human face is performed and transmitted, thereby reducing bandwidth requirements. The modeling process is discussed, with results.
- Full Text:
- Date Issued: 1998
Alkaline rocks in the Kuboos-Bremen Igneous Province, southern Namibia: the Grootpenseiland and Marinkas Kwela Complexes
- Smithies, Robert H, Marsh, Julian S
- Authors: Smithies, Robert H , Marsh, Julian S
- Date: 1996
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145838 , vital:38471
- Description: The early Cambrian Kuboos-Bremen Igneous Province of northwestern South Africa and southern Namibia comprises a series of intrusive bodies that collectively encompass virtually the entire range of alkaline rock types. Two of these bodies, the Grootpenseiland and Marinkas Kwela Complexes lie immediately north of the Orange River and are amongst the few that show this wide lithological range on a local scale.
- Full Text:
- Date Issued: 1996
- Authors: Smithies, Robert H , Marsh, Julian S
- Date: 1996
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/145838 , vital:38471
- Description: The early Cambrian Kuboos-Bremen Igneous Province of northwestern South Africa and southern Namibia comprises a series of intrusive bodies that collectively encompass virtually the entire range of alkaline rock types. Two of these bodies, the Grootpenseiland and Marinkas Kwela Complexes lie immediately north of the Orange River and are amongst the few that show this wide lithological range on a local scale.
- Full Text:
- Date Issued: 1996
The application of real-time design techniques to simulation
- Authors: Wells, George C
- Date: 1989
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430541 , vital:72698 , 10.1049/sej.1989.0040
- Description: The paper discusses the application of the Ward and Mellor structured development techniques for real-time systems to the field of simulation. The tools and heuristics used by Ward and Mellor are extended to provide a useful approach to the design of real-time simulations. This is illustrated by the example of a real-time simulation of a manufacturing plant and process control system.
- Full Text:
- Date Issued: 1989
- Authors: Wells, George C
- Date: 1989
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430541 , vital:72698 , 10.1049/sej.1989.0040
- Description: The paper discusses the application of the Ward and Mellor structured development techniques for real-time systems to the field of simulation. The tools and heuristics used by Ward and Mellor are extended to provide a useful approach to the design of real-time simulations. This is illustrated by the example of a real-time simulation of a manufacturing plant and process control system.
- Full Text:
- Date Issued: 1989
A Review of Arterial Stiffness and HIV Infection in Adult Africans
- Awotedu, Kofoworola Olajire, Iputo, Jehu
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016
- Authors: Awotedu, Kofoworola Olajire , Iputo, Jehu
- Date: 09-06-2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/3484 , vital:43615 , https://www.hilarispublisher.com/open-access/a-review-of-arterial-stiffness-and-hiv-infection-in-adult-africans-2167-1095-1000221.pdf
- Description: Aim: To review the impact of the human immunodeficiency virus and antiretroviral therapy on the vasculature. Objectives: This review seeks to identify the burden which the human immunodeficiency virus and antiretroviral therapy have on the vasculature. Method: Medline/PubMed and Google scholar were searched. There were over 100 publications reviewed. Some people who worked in similar fields were also contacted. The present review summarized current understanding of Human immunodeficiency virus, antiretroviral therapy and effect on the vasculature such as arterial stiffness. Atherosclerosis, endothelial dysfunction, the strengths and weaknesses of current testing strategies, and their potential applications in clinical research and patient care. The association of inflammatory biomarkers, blood pressure and ageing with arterial stiffness were also reviewed. Conclusion: Available literature shows that HIV and antiretroviral agents have a great impact on the vasculature and its progression.
- Full Text:
- Date Issued: 09-06-2016