Wireless communication for previously disadvantaged secondary schools in Grahamstown, South Africa.
- Brandt, Ingrid, Terzoli, Alfredo, Hodgkinson-Williams, Cheryl
- Authors: Brandt, Ingrid , Terzoli, Alfredo , Hodgkinson-Williams, Cheryl
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427615 , vital:72451 , https://citeseerx.ist.psu.edu/document?repid=rep1andtype=pdfanddoi=2520d49f684e821c84350ae8c504572f35186d2f
- Description: With an alarmingly low teledensity in South Africa, less than 5% in some rural areas, and not much hope of further wired infrastructure, as the costs incurred are high compared to potential revenue, wireless connec-tivity could be a great asset and service in South Africa. This paper looks at how wireless communication technologies, 802.11, WiMAX and VSAT, can be used to allow broadband connectivity of schools to the Internet, with special reference to experimental work that is being done in Grahamstown schools.
- Full Text:
- Date Issued: 2005
- Authors: Brandt, Ingrid , Terzoli, Alfredo , Hodgkinson-Williams, Cheryl
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427615 , vital:72451 , https://citeseerx.ist.psu.edu/document?repid=rep1andtype=pdfanddoi=2520d49f684e821c84350ae8c504572f35186d2f
- Description: With an alarmingly low teledensity in South Africa, less than 5% in some rural areas, and not much hope of further wired infrastructure, as the costs incurred are high compared to potential revenue, wireless connec-tivity could be a great asset and service in South Africa. This paper looks at how wireless communication technologies, 802.11, WiMAX and VSAT, can be used to allow broadband connectivity of schools to the Internet, with special reference to experimental work that is being done in Grahamstown schools.
- Full Text:
- Date Issued: 2005
Wireless Network Visualization Using Radio Propagation Modelling
- Janse van Rensburg, Johanna, Irwin, Barry V W
- Authors: Janse van Rensburg, Johanna , Irwin, Barry V W
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428859 , vital:72541 , https://d1wqtxts1xzle7.cloudfront.net/81589186/Papers_5CJanse_van_Rensburg_Wireless_Radio_Prop-libre.pdf?1646243170=esponse-content-disposi-tion=inline%3B+filename%3DWireless_Network_Visualization_Using_Rad.pdfExpires=1714748958Signature=OF69CzUsXIaE9WuVUQ~p01LV8Fdm4EOpX1eudE3qomWEWQ9jngy36AuZ38dZEAfIhWWFgO7byMtmx8hOUE3uYjjqLLGziqWV05r~K2n~DdSHAO1x2omrK53ew3lSW2AJ677zsqOIcRb-yVr7kE2PbAw1QolptUWQVI2YpAHEKdg5EQXm2iAW~FrQ7ljJxuwZTKaVLoubxj4HRLwJxTPIS9iN9nHn3sNKyIojfG6duWnCQ0dpkIKiKWTY6HVioBQCiN1vSdLUagXnTeRthoOFGyfo2kd3XG1Pi3tttIwFviPCh5H1297BCpMruY-h6XjSnPBGgAG33dOnkClBFnyAKg__Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA
- Description: Wireless technologies have had an enormous impact on networking in re-cent years. It can create new business oppurtunities and allow users to communicate and share data in a new fashion. Wireless Networks de-crease installation costs, reduce the deployment time of a network and overcome physical barrier problems inherent in wiring. Unfortunately this flexibility comes at a price. The deployment, installation and setup of a WLAN is not a simple task and a number of factors need to be considered. Wireless Networks are notorious for being insecure due to signal spill, ad-hoc unauthorized access points and varying encryption strengths and standards. RF (Radio Frequency) interference and physical barriers sup-press a signal. In addition the channel frequencies each access point will be using in order to provide maximum roaming but minimum inter access point interference need to be considered. It is a complex balancing act to take these factors into account while still maintaining coverage, perfor-mance and security requirements. In this paper the benefits and feasibility of a model will be discussed that will enable the network administrator to visualize the coverage footprint of their wireless network when the above factors are taken into consideration. The program will be able to predict the strength, propagation and unwanted spill of signals which could compro-mise the security of an organisation prior to the deployment of a WLAN. In addition the model will provide functionality to visualize a signal from audit data once the WLAN is operational. The end result will be a program that can aid in the configuration, installation and management of a secure WLAN.
- Full Text:
- Date Issued: 2005
- Authors: Janse van Rensburg, Johanna , Irwin, Barry V W
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428859 , vital:72541 , https://d1wqtxts1xzle7.cloudfront.net/81589186/Papers_5CJanse_van_Rensburg_Wireless_Radio_Prop-libre.pdf?1646243170=esponse-content-disposi-tion=inline%3B+filename%3DWireless_Network_Visualization_Using_Rad.pdfExpires=1714748958Signature=OF69CzUsXIaE9WuVUQ~p01LV8Fdm4EOpX1eudE3qomWEWQ9jngy36AuZ38dZEAfIhWWFgO7byMtmx8hOUE3uYjjqLLGziqWV05r~K2n~DdSHAO1x2omrK53ew3lSW2AJ677zsqOIcRb-yVr7kE2PbAw1QolptUWQVI2YpAHEKdg5EQXm2iAW~FrQ7ljJxuwZTKaVLoubxj4HRLwJxTPIS9iN9nHn3sNKyIojfG6duWnCQ0dpkIKiKWTY6HVioBQCiN1vSdLUagXnTeRthoOFGyfo2kd3XG1Pi3tttIwFviPCh5H1297BCpMruY-h6XjSnPBGgAG33dOnkClBFnyAKg__Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA
- Description: Wireless technologies have had an enormous impact on networking in re-cent years. It can create new business oppurtunities and allow users to communicate and share data in a new fashion. Wireless Networks de-crease installation costs, reduce the deployment time of a network and overcome physical barrier problems inherent in wiring. Unfortunately this flexibility comes at a price. The deployment, installation and setup of a WLAN is not a simple task and a number of factors need to be considered. Wireless Networks are notorious for being insecure due to signal spill, ad-hoc unauthorized access points and varying encryption strengths and standards. RF (Radio Frequency) interference and physical barriers sup-press a signal. In addition the channel frequencies each access point will be using in order to provide maximum roaming but minimum inter access point interference need to be considered. It is a complex balancing act to take these factors into account while still maintaining coverage, perfor-mance and security requirements. In this paper the benefits and feasibility of a model will be discussed that will enable the network administrator to visualize the coverage footprint of their wireless network when the above factors are taken into consideration. The program will be able to predict the strength, propagation and unwanted spill of signals which could compro-mise the security of an organisation prior to the deployment of a WLAN. In addition the model will provide functionality to visualize a signal from audit data once the WLAN is operational. The end result will be a program that can aid in the configuration, installation and management of a secure WLAN.
- Full Text:
- Date Issued: 2005
Woman doing Ngqokola
- Ngqoko group participants, Composer not specified, Dargie, Dave
- Authors: Ngqoko group participants , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350739 , vital:63912 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC355b-02
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
- Authors: Ngqoko group participants , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350739 , vital:63912 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC355b-02
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
Woman doing Ngqokola
- Ngqoko group participants, Composer not specified, Dargie, Dave
- Authors: Ngqoko group participants , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350734 , vital:63911 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC355b-01
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
- Authors: Ngqoko group participants , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350734 , vital:63911 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC355b-01
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
Writing, identity, and change : a narrative case study of the use of journals to promote reflexivity within a Drama Studies curriculum
- Authors: Sutherland, Alexandra
- Date: 2005
- Subjects: Drama -- Study and teaching (Higher) -- South Africa Drama in education Scholarly publishing Academic writing Reflection (Philosophy) Playwriting
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1845 , http://hdl.handle.net/10962/d1004384
- Description: The study adopts a case study examination of three student reflective joumals written about class and field based applied Drama experiences over one year. The journals were written as part of a curriculum outcome to develop reflective practice, for one Drama Honours paper (Educational Drama and Theatre) at Rhodes University Drama Department, South Africa. Based on a narrative inquiry approach, the study documents the changes in identity, discourse, and representation of self and other, which emerge through the journal writing process. The research analyses how identities are constructed through reflective writing practices, and how these identities might relate to the arguments for the development of reflexivity. The development of reflexivity is seen as integral to contemporary educational policies associated with lifelong learning, and the skills required of graduates in South Africa's emerging democracy. These policies centre on means of preparing students for a world characterised by change and instability, or what Barnett (2000) has termed a "supercomplex world". The research findings suggest that journal writing within a Drama Studies curriculum, allows students to construct subjectivities which support Barnett's claim that "the main pedagogical task in a university is not that of the transmission of knowledge but of promoting forms of human being appropriate to the conditions of supercomplexity" (Barnett, 2000b: 164). In addition, the development of different writing genres within a Drama Studies curriculum allows students to develop disciplinarily relevant ways of discussing and researching artistic processes and products. A reflective journal is a potential site for students to interrogate and construct emerging identities which enable them to negotiate diversity, thus preparing them for their lives beyond the university.
- Full Text:
- Date Issued: 2005
- Authors: Sutherland, Alexandra
- Date: 2005
- Subjects: Drama -- Study and teaching (Higher) -- South Africa Drama in education Scholarly publishing Academic writing Reflection (Philosophy) Playwriting
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1845 , http://hdl.handle.net/10962/d1004384
- Description: The study adopts a case study examination of three student reflective joumals written about class and field based applied Drama experiences over one year. The journals were written as part of a curriculum outcome to develop reflective practice, for one Drama Honours paper (Educational Drama and Theatre) at Rhodes University Drama Department, South Africa. Based on a narrative inquiry approach, the study documents the changes in identity, discourse, and representation of self and other, which emerge through the journal writing process. The research analyses how identities are constructed through reflective writing practices, and how these identities might relate to the arguments for the development of reflexivity. The development of reflexivity is seen as integral to contemporary educational policies associated with lifelong learning, and the skills required of graduates in South Africa's emerging democracy. These policies centre on means of preparing students for a world characterised by change and instability, or what Barnett (2000) has termed a "supercomplex world". The research findings suggest that journal writing within a Drama Studies curriculum, allows students to construct subjectivities which support Barnett's claim that "the main pedagogical task in a university is not that of the transmission of knowledge but of promoting forms of human being appropriate to the conditions of supercomplexity" (Barnett, 2000b: 164). In addition, the development of different writing genres within a Drama Studies curriculum allows students to develop disciplinarily relevant ways of discussing and researching artistic processes and products. A reflective journal is a potential site for students to interrogate and construct emerging identities which enable them to negotiate diversity, thus preparing them for their lives beyond the university.
- Full Text:
- Date Issued: 2005
XML digital signature and RDF
- Cloran, Russell, Irwin, Barry V W
- Authors: Cloran, Russell , Irwin, Barry V W
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428874 , vital:72542 , https://digifors.cs.up.ac.za/issa/2005/Proceedings/Poster/026_Article.pdf
- Description: The XML Signature working group focuses on the canonicalisation of XML, and the syntax used to sign an XML document. This process focuses on the semantics intro-duced by the XML language itself, but ignores semantics which a particular applica-tion of XML may add. The Resource Description Framework (RDF) is a language for representing information about resources on the Web. RDF has a number of possi-ble serialisations, including an XML serialisation (RDF/XML), popularly used as the format for exchanging RDF data. In general, the order of statements in RDF is not important, and thus the order in which XML tags occur in RDF/XML can vary greatly whilst still preserving semantics. This paper examines some of the issues surround-ing the canonicalisation of RDF/XML and the signing of it, discussing nesting, node identifiers and the ordering of nodes. Existing RDF serialisation formats are consid-ered as case studies of partially canonical RDF formats.
- Full Text:
- Date Issued: 2005
- Authors: Cloran, Russell , Irwin, Barry V W
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428874 , vital:72542 , https://digifors.cs.up.ac.za/issa/2005/Proceedings/Poster/026_Article.pdf
- Description: The XML Signature working group focuses on the canonicalisation of XML, and the syntax used to sign an XML document. This process focuses on the semantics intro-duced by the XML language itself, but ignores semantics which a particular applica-tion of XML may add. The Resource Description Framework (RDF) is a language for representing information about resources on the Web. RDF has a number of possi-ble serialisations, including an XML serialisation (RDF/XML), popularly used as the format for exchanging RDF data. In general, the order of statements in RDF is not important, and thus the order in which XML tags occur in RDF/XML can vary greatly whilst still preserving semantics. This paper examines some of the issues surround-ing the canonicalisation of RDF/XML and the signing of it, discussing nesting, node identifiers and the ordering of nodes. Existing RDF serialisation formats are consid-ered as case studies of partially canonical RDF formats.
- Full Text:
- Date Issued: 2005
You can’t be serious:
- Strelitz, Larry N, Steenveld, Lynette N
- Authors: Strelitz, Larry N , Steenveld, Lynette N
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159215 , vital:40278 , https://hdl.handle.net/10520/EJC146377
- Description: As well as pandering to the lowest common denominator and simplifying complex issues, tabloids are also condemned for generally failing to provide information that citizens need in order to make informed political judgements - the latter being the raison d'etre of serious newspapers. In summary, tabloids "lower the standards of public discourse" (Ornerbring and Jonson, 2004: 283).
- Full Text:
- Date Issued: 2005
- Authors: Strelitz, Larry N , Steenveld, Lynette N
- Date: 2005
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159215 , vital:40278 , https://hdl.handle.net/10520/EJC146377
- Description: As well as pandering to the lowest common denominator and simplifying complex issues, tabloids are also condemned for generally failing to provide information that citizens need in order to make informed political judgements - the latter being the raison d'etre of serious newspapers. In summary, tabloids "lower the standards of public discourse" (Ornerbring and Jonson, 2004: 283).
- Full Text:
- Date Issued: 2005
Zange ndiw'bone umzi wezinja
- Preformer not specified, Composer not specified, Dargie, Dave
- Authors: Preformer not specified , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350998 , vital:63938 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC356b-05
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
- Authors: Preformer not specified , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350998 , vital:63938 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC356b-05
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
Zinkomo zam
- Preformer not specified, Composer not specified, Dargie, Dave
- Authors: Preformer not specified , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350947 , vital:63933 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC356a-08
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005
- Authors: Preformer not specified , Composer not specified , Dargie, Dave
- Date: 2005
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: isiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/350947 , vital:63933 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC356a-08
- Description: Ngqoko Group participants at the University of Fort Hare
- Full Text: false
- Date Issued: 2005