A tetrapod fauna from within the Devonian Antarctic Circle
- Gess, Robert W, Ahlberg, Per Erik Ahlberg
- Authors: Gess, Robert W , Ahlberg, Per Erik Ahlberg
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/72690 , vital:30100 , https://doi.org/10.1126/science.aaq1645 , https://www.sciencemag.org/content/360/6393/1120/suppl/DC1
- Description: Until now, all known fossils of tetrapods (limbed vertebrates with digits) and near-tetrapods (such as Elpistostege, Tiktaalik, and Panderichthys) from the Devonian period have come from localities in tropical to subtropical paleolatitudes. Most are from Laurussia, a continent incorporating Europe, Greenland, and North America, with only one body fossil and one footprint locality from Australia representing the southern supercontinent Gondwana. Here we describe two previously unknown tetrapods from the Late Devonian (late Famennian) Gondwana locality of Waterloo Farm in South Africa, then located within the Antarctic Circle, which demonstrate that Devonian tetrapods were not restricted to warm environments and suggest that they may have been global in distribution.
- Full Text:
- Date Issued: 2009
- Authors: Gess, Robert W , Ahlberg, Per Erik Ahlberg
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/72690 , vital:30100 , https://doi.org/10.1126/science.aaq1645 , https://www.sciencemag.org/content/360/6393/1120/suppl/DC1
- Description: Until now, all known fossils of tetrapods (limbed vertebrates with digits) and near-tetrapods (such as Elpistostege, Tiktaalik, and Panderichthys) from the Devonian period have come from localities in tropical to subtropical paleolatitudes. Most are from Laurussia, a continent incorporating Europe, Greenland, and North America, with only one body fossil and one footprint locality from Australia representing the southern supercontinent Gondwana. Here we describe two previously unknown tetrapods from the Late Devonian (late Famennian) Gondwana locality of Waterloo Farm in South Africa, then located within the Antarctic Circle, which demonstrate that Devonian tetrapods were not restricted to warm environments and suggest that they may have been global in distribution.
- Full Text:
- Date Issued: 2009
Aes white paper: Best practices in network audio
- Bouillot, Nicolas, Cohen, Elizabeth, Cooperstock, Jeremy R, Floros, Andreas, Fonseca, Nuno, Foss, Richard, Goodman, Michael, Grant, John, Gross, Kevin, Harris, Steven, Harshbarger, Brent, Heyraud, Joffrey, Jonsson, Lars, Narus, John, Page, Michael, Snook, Tom, Tanaka, Atau, Trieger, Justin, Zanghieri, Umberto
- Authors: Bouillot, Nicolas , Cohen, Elizabeth , Cooperstock, Jeremy R , Floros, Andreas , Fonseca, Nuno , Foss, Richard , Goodman, Michael , Grant, John , Gross, Kevin , Harris, Steven , Harshbarger, Brent , Heyraud, Joffrey , Jonsson, Lars , Narus, John , Page, Michael , Snook, Tom , Tanaka, Atau , Trieger, Justin , Zanghieri, Umberto
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427181 , vital:72420 , https://www.aes.org/e-lib/browse.cfm?elib=14839
- Description: Analog audio needs a separate physical circuit for each channel. Each microphone in a studio or on a stage, for example, must have its own circuit back to the mixer. Routing of the signals is inflexible. Digital audio is frequently wired in a similar way to analog. Although several channels can share a single physical circuit ( e. g., up to 64 with AES10 ), thus reducing the number of cores needed in a cable. Routing of signals is still inflexible and any change to the equipment in a location is liable to require new cabling. Networks allow much more flexibility. Any piece of equipment plugged into the network is able to communicate with any other. However, installers of audio networks need to be aware of a number of issues that affect audio signals but are not important for data networks and are not addressed by current IT networking technologies such as IP. This white paper examines these issues and provides guidance to installers and users that can help them build successful networked systems.
- Full Text:
- Date Issued: 2009
- Authors: Bouillot, Nicolas , Cohen, Elizabeth , Cooperstock, Jeremy R , Floros, Andreas , Fonseca, Nuno , Foss, Richard , Goodman, Michael , Grant, John , Gross, Kevin , Harris, Steven , Harshbarger, Brent , Heyraud, Joffrey , Jonsson, Lars , Narus, John , Page, Michael , Snook, Tom , Tanaka, Atau , Trieger, Justin , Zanghieri, Umberto
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427181 , vital:72420 , https://www.aes.org/e-lib/browse.cfm?elib=14839
- Description: Analog audio needs a separate physical circuit for each channel. Each microphone in a studio or on a stage, for example, must have its own circuit back to the mixer. Routing of the signals is inflexible. Digital audio is frequently wired in a similar way to analog. Although several channels can share a single physical circuit ( e. g., up to 64 with AES10 ), thus reducing the number of cores needed in a cable. Routing of signals is still inflexible and any change to the equipment in a location is liable to require new cabling. Networks allow much more flexibility. Any piece of equipment plugged into the network is able to communicate with any other. However, installers of audio networks need to be aware of a number of issues that affect audio signals but are not important for data networks and are not addressed by current IT networking technologies such as IP. This white paper examines these issues and provides guidance to installers and users that can help them build successful networked systems.
- Full Text:
- Date Issued: 2009
Alan Peacock and Ilde Rizzo: the heritage game
- Authors: Snowball, Jeanette D
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71470 , vital:29856 , https://doi.org/10.1007/s10824-009-9106-2
- Description: The Heritage Game has an ambitious aim: to persuade those engaged in heritage management that economists have a valuable contribution to make and that they should be allowed to join the table where decisions are made—not as occasional “hired guns” consulting on specific matters, but as routine and continuous contributors to the discussion. As such, the book explains and illuminates some of the fundamental ideas in economics (consumer sovereignty, moral hazard, incentives, opportunity cost) as applied to the “heritage biz”. It is written in a light-hearted style that fulfils the authors’ intention of “making economics palatable and even enjoyable … offering both instruction and entertainment” (p. 10). Even economists familiar with the field will thus find it a pleasurable read, filled as it is with humorous anecdotes and examples drawn from the authors’ personal experiences as contributors to heritage management and policy.
- Full Text:
- Date Issued: 2009
- Authors: Snowball, Jeanette D
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71470 , vital:29856 , https://doi.org/10.1007/s10824-009-9106-2
- Description: The Heritage Game has an ambitious aim: to persuade those engaged in heritage management that economists have a valuable contribution to make and that they should be allowed to join the table where decisions are made—not as occasional “hired guns” consulting on specific matters, but as routine and continuous contributors to the discussion. As such, the book explains and illuminates some of the fundamental ideas in economics (consumer sovereignty, moral hazard, incentives, opportunity cost) as applied to the “heritage biz”. It is written in a light-hearted style that fulfils the authors’ intention of “making economics palatable and even enjoyable … offering both instruction and entertainment” (p. 10). Even economists familiar with the field will thus find it a pleasurable read, filled as it is with humorous anecdotes and examples drawn from the authors’ personal experiences as contributors to heritage management and policy.
- Full Text:
- Date Issued: 2009
An analysis of collective bargaining arrangements in the construction industry
- BWI
- Authors: BWI
- Date: 2009
- Subjects: BWI
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/135556 , vital:37275
- Description: The BWI is the global union federation grouping of free and democratic unions, with members in the building, building materials, wood, forestry and allied sectors. The BWI groups together around 318 trade unions representing around 12 million members in 130 countries. The headquarters is in Geneva, Switzerland. Regional and Project offices are located in Panama and Malaysia, South Africa, India, Australia, Burkina Faso, Bulgaria, Lebanon, Kenya, South Korea, Russia, Argentina, Peru and Brazil. Our mission is to promote the development of trade unions in our sectors throughout the world, and to promote and enforce workers' rights in the context of sustainable development. The President of the International is Klaus Wiesehiigel from the Building and Forest Workers Union in Germany. The Deputy President is Stefaan Vantourenhout from the Building and Wood Workers union in Belgium and the General Secretary is Anita Normark from Sweden.
- Full Text:
- Date Issued: 2009
- Authors: BWI
- Date: 2009
- Subjects: BWI
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/135556 , vital:37275
- Description: The BWI is the global union federation grouping of free and democratic unions, with members in the building, building materials, wood, forestry and allied sectors. The BWI groups together around 318 trade unions representing around 12 million members in 130 countries. The headquarters is in Geneva, Switzerland. Regional and Project offices are located in Panama and Malaysia, South Africa, India, Australia, Burkina Faso, Bulgaria, Lebanon, Kenya, South Korea, Russia, Argentina, Peru and Brazil. Our mission is to promote the development of trade unions in our sectors throughout the world, and to promote and enforce workers' rights in the context of sustainable development. The President of the International is Klaus Wiesehiigel from the Building and Forest Workers Union in Germany. The Deputy President is Stefaan Vantourenhout from the Building and Wood Workers union in Belgium and the General Secretary is Anita Normark from Sweden.
- Full Text:
- Date Issued: 2009
An analysis of logical network distance on observed packet counts for network telescope data
- Irwin, Barry V W, Barnett, Richard J
- Authors: Irwin, Barry V W , Barnett, Richard J
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428090 , vital:72485 , https://www.researchgate.net/profile/Barry-Ir-win/publication/228765119_An_Analysis_of_Logical_Network_Distance_on_Observed_Packet_Counts_for_Network_Telescope_Data/links/53e9c5e80cf28f342f414988/An-Analysis-of-Logical-Network-Distance-on-Observed-Packet-Counts-for-Network-Telescope-Data.pdf
- Description: This paper investigates the relationship between the logical distance between two IP addresses on the Internet, and the number of packets captured by a network telescope listening on a network containing one of the addresses. The need for the computation of a manageable measure of quantification of this distance is presented, as an alterna-tive to the raw difference that can be computed between two addresses using their Integer representations. A number of graphical analysis tools and techniques are presented to aid in this analysis. Findings are pre-sented based on a long baseline data set collected at Rhodes Universi-ty over the last three years, using a dedicated Class C (256 IP address) sensor network, and comprising 19 million packets. Of this total, 27% by packet volume originate within the same natural class A network as the telescope, and as such can be seen to be logically close to the collector network.
- Full Text:
- Date Issued: 2009
- Authors: Irwin, Barry V W , Barnett, Richard J
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428090 , vital:72485 , https://www.researchgate.net/profile/Barry-Ir-win/publication/228765119_An_Analysis_of_Logical_Network_Distance_on_Observed_Packet_Counts_for_Network_Telescope_Data/links/53e9c5e80cf28f342f414988/An-Analysis-of-Logical-Network-Distance-on-Observed-Packet-Counts-for-Network-Telescope-Data.pdf
- Description: This paper investigates the relationship between the logical distance between two IP addresses on the Internet, and the number of packets captured by a network telescope listening on a network containing one of the addresses. The need for the computation of a manageable measure of quantification of this distance is presented, as an alterna-tive to the raw difference that can be computed between two addresses using their Integer representations. A number of graphical analysis tools and techniques are presented to aid in this analysis. Findings are pre-sented based on a long baseline data set collected at Rhodes Universi-ty over the last three years, using a dedicated Class C (256 IP address) sensor network, and comprising 19 million packets. Of this total, 27% by packet volume originate within the same natural class A network as the telescope, and as such can be seen to be logically close to the collector network.
- Full Text:
- Date Issued: 2009
An Asterisk-based framework for E-learning using open protocols and open source software
- Tsietsi, Mosiuoa, Shibeshi, Zelalem S, Terzoli, Alfredo, Wells, George C
- Authors: Tsietsi, Mosiuoa , Shibeshi, Zelalem S , Terzoli, Alfredo , Wells, George C
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429091 , vital:72559 , https://ieeexplore.ieee.org/abstract/document/5338904
- Description: This paper describes the conceptual design of an e-learning system that is based on open protocols and open source software. This is an initial step towards providing a framework within which remote lectures at our university can be conducted with other institutions in the Southern African region. The motivation for this effort is born out of a desire to avoid expensive and inflexible commercial tools that have been used in the past, often with undesirable side effects. Our design promises to deliver most of the features that can be expected of a modern e-learning system such as a Web interface, space for lecture material, real-time audio and video support, instant messaging and the ability to convey presence. We identified two modes of operation, one as a Web-based video archive and the other as a live virtual classroom. It is hoped that this dual-mode setup will support different modes of learning for students and suit different bandwidth resources among institutions.
- Full Text:
- Date Issued: 2009
- Authors: Tsietsi, Mosiuoa , Shibeshi, Zelalem S , Terzoli, Alfredo , Wells, George C
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429091 , vital:72559 , https://ieeexplore.ieee.org/abstract/document/5338904
- Description: This paper describes the conceptual design of an e-learning system that is based on open protocols and open source software. This is an initial step towards providing a framework within which remote lectures at our university can be conducted with other institutions in the Southern African region. The motivation for this effort is born out of a desire to avoid expensive and inflexible commercial tools that have been used in the past, often with undesirable side effects. Our design promises to deliver most of the features that can be expected of a modern e-learning system such as a Web interface, space for lecture material, real-time audio and video support, instant messaging and the ability to convey presence. We identified two modes of operation, one as a Web-based video archive and the other as a live virtual classroom. It is hoped that this dual-mode setup will support different modes of learning for students and suit different bandwidth resources among institutions.
- Full Text:
- Date Issued: 2009
An examination of feedback on draft essays, using Halliday's definition of context:
- Authors: Quinn, Lynn
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69500 , vital:29544 , https://doi.org/10.1080/10286632.2016.1255206
- Description: An historical structural understanding underpins the research reported on in this paper. The ideas of the systemic functional linguist, Michael Halliday, are used to examine a draftingresponding-redrafting process used to develop students'. academic writing in the English Language for Academic Purposes (ELAP) course at Rhodes University. Using the Hallidayan framework, I examine how the process can help students adapt to the broader culture of the university and at a more micro level how the comments made by the respondent can help student writers to acquire the academic literacy required to write essays in the context of situation of the ELAP course. The features of field, tenor and mode and their associated textual meanings (that is, experiential meaning, interpersonal meaning and textual meaning) are used to categorise the ways in which comments made at the draft stage of the writing process can develop students' writing. As a result of my research I argue in this paper that it might be useful for writing consultants/lecturers to think of their feedback to students' writing in terms of these categories and to consider whether they have helped students to develop their writing by taking into account the features of the particular social context in which the writing takes place.
- Full Text:
- Date Issued: 2009
- Authors: Quinn, Lynn
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69500 , vital:29544 , https://doi.org/10.1080/10286632.2016.1255206
- Description: An historical structural understanding underpins the research reported on in this paper. The ideas of the systemic functional linguist, Michael Halliday, are used to examine a draftingresponding-redrafting process used to develop students'. academic writing in the English Language for Academic Purposes (ELAP) course at Rhodes University. Using the Hallidayan framework, I examine how the process can help students adapt to the broader culture of the university and at a more micro level how the comments made by the respondent can help student writers to acquire the academic literacy required to write essays in the context of situation of the ELAP course. The features of field, tenor and mode and their associated textual meanings (that is, experiential meaning, interpersonal meaning and textual meaning) are used to categorise the ways in which comments made at the draft stage of the writing process can develop students' writing. As a result of my research I argue in this paper that it might be useful for writing consultants/lecturers to think of their feedback to students' writing in terms of these categories and to consider whether they have helped students to develop their writing by taking into account the features of the particular social context in which the writing takes place.
- Full Text:
- Date Issued: 2009
An Integrated Connection Management and Control Protocol for Audio Networks
- Foss, Richard, Gurdan, Robby, Klinkradt, Bradley, Chigwamba, Nyasha
- Authors: Foss, Richard , Gurdan, Robby , Klinkradt, Bradley , Chigwamba, Nyasha
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427111 , vital:72415 , https://www.aes.org/e-lib/browse.cfm?elib=15135
- Description: With the advent of digital networks that link audio devices, there is a need for a protocol that integrates control and connection management, allows for streaming of all media content such as audio and video between devices from different manufacturers, and that provides a common approach to the control of these devices. This paper proposes such a protocol, named XFN, currently being standardized as part of the AES X170 project. XFN is an IP-based peer to peer network protocol, in which any device on the network may send or receive connection management, control, and monitoring messages. Essential to the XFN protocol is the fact that each parameter in a device can be addressed via a hierarchical structure that reflects the natural layout of the device.
- Full Text:
- Date Issued: 2009
- Authors: Foss, Richard , Gurdan, Robby , Klinkradt, Bradley , Chigwamba, Nyasha
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427111 , vital:72415 , https://www.aes.org/e-lib/browse.cfm?elib=15135
- Description: With the advent of digital networks that link audio devices, there is a need for a protocol that integrates control and connection management, allows for streaming of all media content such as audio and video between devices from different manufacturers, and that provides a common approach to the control of these devices. This paper proposes such a protocol, named XFN, currently being standardized as part of the AES X170 project. XFN is an IP-based peer to peer network protocol, in which any device on the network may send or receive connection management, control, and monitoring messages. Essential to the XFN protocol is the fact that each parameter in a device can be addressed via a hierarchical structure that reflects the natural layout of the device.
- Full Text:
- Date Issued: 2009
An intercultural approach to implementing multilingualism at Rhodes University, South Africa
- Kaschula, Russell H, Maseko, Pamela, Dalvit, Lorenzo, Mapi, Thandeka, Nelani, Linda, Nosilela, Bulelwa, Sam, Msindisi S
- Authors: Kaschula, Russell H , Maseko, Pamela , Dalvit, Lorenzo , Mapi, Thandeka , Nelani, Linda , Nosilela, Bulelwa , Sam, Msindisi S
- Date: 2009
- Subjects: Multilingualism -- South Africa , Intercultural communication , Education, Higher -- South Africa , Language and culture -- South Africa , Language and education -- South Africa , Rhodes University
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59390 , vital:27579 , doi: 10.5842/39-0-74
- Description: The work of intercultural communication theorists such as Ting-Toomey (1999) and Gudykunst (2003) has informed curriculum design and teaching methodology of the courses developed for teaching isiXhosa for vocational purposes to second language (L2) learners. This seems to be an appropriate theoretical paradigm within multilingual South Africa, where intercultural communication is becoming a daily reality for a growing portion of the population. We make use of this theory to introduce and develop experiential understanding of multilingualism at Rhodes University in various departments and, more generally, on campus.
- Full Text:
- Date Issued: 2009
- Authors: Kaschula, Russell H , Maseko, Pamela , Dalvit, Lorenzo , Mapi, Thandeka , Nelani, Linda , Nosilela, Bulelwa , Sam, Msindisi S
- Date: 2009
- Subjects: Multilingualism -- South Africa , Intercultural communication , Education, Higher -- South Africa , Language and culture -- South Africa , Language and education -- South Africa , Rhodes University
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59390 , vital:27579 , doi: 10.5842/39-0-74
- Description: The work of intercultural communication theorists such as Ting-Toomey (1999) and Gudykunst (2003) has informed curriculum design and teaching methodology of the courses developed for teaching isiXhosa for vocational purposes to second language (L2) learners. This seems to be an appropriate theoretical paradigm within multilingual South Africa, where intercultural communication is becoming a daily reality for a growing portion of the population. We make use of this theory to introduce and develop experiential understanding of multilingualism at Rhodes University in various departments and, more generally, on campus.
- Full Text:
- Date Issued: 2009
Analyzing, digitizing and technologizing the oral word: the case of Bongani Sitole
- Kaschula, Russell H, Mostert, André
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Sitole, Bongani, 1937- , Xhosa (African people) -- South Africa , Xhosa poetry , Folk poetry, Xhosa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59368 , vital:27566 , https://doi.org/10.1080/13696810903259384
- Description: This article analyzes the oral poetry, izibongo, produced by Xhosa oral poet Bongani Sitole (both in book and technological form). It will trace this poetry from the moment it was orally produced, through to the technologizing and publication of this poetry in book form and on a website. The initial part of this article looks at the life and work of the poet. A contextual analysis of selected poetry is provided. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word. The term ‘technauriture’ has been coined in order to refer to this process. The contribution of eLearning4Africa (www.elearning4africa.com) to the digitization process of Sitole’s poetry is acknowledged.
- Full Text:
- Date Issued: 2009
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Sitole, Bongani, 1937- , Xhosa (African people) -- South Africa , Xhosa poetry , Folk poetry, Xhosa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59368 , vital:27566 , https://doi.org/10.1080/13696810903259384
- Description: This article analyzes the oral poetry, izibongo, produced by Xhosa oral poet Bongani Sitole (both in book and technological form). It will trace this poetry from the moment it was orally produced, through to the technologizing and publication of this poetry in book form and on a website. The initial part of this article looks at the life and work of the poet. A contextual analysis of selected poetry is provided. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word. The term ‘technauriture’ has been coined in order to refer to this process. The contribution of eLearning4Africa (www.elearning4africa.com) to the digitization process of Sitole’s poetry is acknowledged.
- Full Text:
- Date Issued: 2009
Antiretroviral therapy in a South African public health care setting – facilitating and constraining factors
- Ruud, K W, Srinivas, Sunitha C, Toverud, E-L
- Authors: Ruud, K W , Srinivas, Sunitha C , Toverud, E-L
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6453 , http://hdl.handle.net/10962/d1006831
- Description: The objective of the study was to identify and document facilitating and constraining factors in the antiretroviral therapy (ART) programme in a public health care setting in the Eastern Cape, South Africa. Observations for the study were carried out in a district hospital and two down-referral clinics in Makana Local Services Area in the Eastern Cape Province. Two discussion groups with key stakeholders were conducted to gather information about opinions and experiences among the health care providers (HCPs). It was found that the operating ART programme in this setting has been integrated in the existing down-referral health care system, based on follow-up in primary health care (PHC) clinics. Treatment is provided free of charge. The treatment programme provides the patients with access to counselling, nutritional assistance, psychosocial support and social welfare evaluation. However, increasing patient numbers and lack of human resources leads to a heavy workload for the HCPs involved with the ART programme. The need for additional, educated health workers is a major constraint for progress in provision of health care to patients who have accepted their HIV status, and are enrolled, or waiting to be enrolled, on the ART. However, delegation of work tasks among available HCPs and good communication between HCPs in the different clinics is a facilitating factor that ensures efficient use of the human resources available. Conclusion: Taking into account the challenges in a resource-constrained setting, this programme shows potential for functioning well as a provider of ART for those who are able and willing to access it. Considering an already heavy workload for HCPs, limitations and challenges still exist in reaching out with adequate treatment to a greater number of people who need ART.
- Full Text:
- Date Issued: 2009
- Authors: Ruud, K W , Srinivas, Sunitha C , Toverud, E-L
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6453 , http://hdl.handle.net/10962/d1006831
- Description: The objective of the study was to identify and document facilitating and constraining factors in the antiretroviral therapy (ART) programme in a public health care setting in the Eastern Cape, South Africa. Observations for the study were carried out in a district hospital and two down-referral clinics in Makana Local Services Area in the Eastern Cape Province. Two discussion groups with key stakeholders were conducted to gather information about opinions and experiences among the health care providers (HCPs). It was found that the operating ART programme in this setting has been integrated in the existing down-referral health care system, based on follow-up in primary health care (PHC) clinics. Treatment is provided free of charge. The treatment programme provides the patients with access to counselling, nutritional assistance, psychosocial support and social welfare evaluation. However, increasing patient numbers and lack of human resources leads to a heavy workload for the HCPs involved with the ART programme. The need for additional, educated health workers is a major constraint for progress in provision of health care to patients who have accepted their HIV status, and are enrolled, or waiting to be enrolled, on the ART. However, delegation of work tasks among available HCPs and good communication between HCPs in the different clinics is a facilitating factor that ensures efficient use of the human resources available. Conclusion: Taking into account the challenges in a resource-constrained setting, this programme shows potential for functioning well as a provider of ART for those who are able and willing to access it. Considering an already heavy workload for HCPs, limitations and challenges still exist in reaching out with adequate treatment to a greater number of people who need ART.
- Full Text:
- Date Issued: 2009
Apis florea in Jordan: source of the founder population
- Haddad, N, Fuchs, S, Hepburn, H Randall, Radloff, Sarah E
- Authors: Haddad, N , Fuchs, S , Hepburn, H Randall , Radloff, Sarah E
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6844 , http://hdl.handle.net/10962/d1011047
- Description: A recent isolated population of Apis florea has been reported from Aqaba in Jordan at the Red Sea, consisting of numerous colonies within a still limited range which apparently is expanding. This region is about 1500 km apart from its next occurrences in Sudan where it had been introduced and first detected in 1985 and about 2000 km apart from its next natural occurrences in Iran and Oman. These bees apparently have been imported by human transport, most likely by ship. This new location thus represents a major jump in the progression of the species still to fill a wide area of possible locations offering adequate living conditions. Here we attempt to track the possible origin of this new population by morphometric methods. This analysis indicated closest relation to A. florea from Oman, thus being the most likely source of this population.
- Full Text:
- Date Issued: 2009
- Authors: Haddad, N , Fuchs, S , Hepburn, H Randall , Radloff, Sarah E
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6844 , http://hdl.handle.net/10962/d1011047
- Description: A recent isolated population of Apis florea has been reported from Aqaba in Jordan at the Red Sea, consisting of numerous colonies within a still limited range which apparently is expanding. This region is about 1500 km apart from its next occurrences in Sudan where it had been introduced and first detected in 1985 and about 2000 km apart from its next natural occurrences in Iran and Oman. These bees apparently have been imported by human transport, most likely by ship. This new location thus represents a major jump in the progression of the species still to fill a wide area of possible locations offering adequate living conditions. Here we attempt to track the possible origin of this new population by morphometric methods. This analysis indicated closest relation to A. florea from Oman, thus being the most likely source of this population.
- Full Text:
- Date Issued: 2009
Augmenting an e-Commerce service for Marginalized Communities: A Rewards Based Marketing Approach
- Jere, Norbert R, Thinyane, Mamello, Terzoli, Alfredo
- Authors: Jere, Norbert R , Thinyane, Mamello , Terzoli, Alfredo
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428463 , vital:72513 , https://www.researchgate.net/profile/Alfredo-Terzoli/publication/228968666_Augmenting_an_e-Com-merce_service_for_Marginalized_Communities_A_Rewards_Based_Marketing_Approach/links/09e4151344c1f615f7000000/Augmenting-an-e-Commerce-service-for-Marginalized-Communities-A-Rewards-Based-Marketing-Approach.pdf
- Description: Information and Communication technologies (ICTs) have been widely deployed in developmental programmes and this has lead to the crea-tion of a new field–ICT for development (ICT4D). Many e-Commerce platforms now exist in many rural areas in developing countries. ICT4D allows Small, Medium and Micro Enterprises (SMMEs) in rural areas to increase sales and gain the market share on the global market. Howev-er, many of these ICT4D projects in marginalized areas fail as a result of lacking the required resources to support ICTs. SMMEs in rural areas face problems in marketing their products on the global market. There-fore, ensuring sustainability of such systems in marginalized areas is important. This paper explains an e-Marketing strategy through a re-ward based negotiation application, aimed at improving the existing e-Commerce platform. The e-Commerce platform has been deployed for the Dwesa community. Dwesa is a rural area in the Eastern Cape prov-ince of South Africa.
- Full Text:
- Date Issued: 2009
- Authors: Jere, Norbert R , Thinyane, Mamello , Terzoli, Alfredo
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428463 , vital:72513 , https://www.researchgate.net/profile/Alfredo-Terzoli/publication/228968666_Augmenting_an_e-Com-merce_service_for_Marginalized_Communities_A_Rewards_Based_Marketing_Approach/links/09e4151344c1f615f7000000/Augmenting-an-e-Commerce-service-for-Marginalized-Communities-A-Rewards-Based-Marketing-Approach.pdf
- Description: Information and Communication technologies (ICTs) have been widely deployed in developmental programmes and this has lead to the crea-tion of a new field–ICT for development (ICT4D). Many e-Commerce platforms now exist in many rural areas in developing countries. ICT4D allows Small, Medium and Micro Enterprises (SMMEs) in rural areas to increase sales and gain the market share on the global market. Howev-er, many of these ICT4D projects in marginalized areas fail as a result of lacking the required resources to support ICTs. SMMEs in rural areas face problems in marketing their products on the global market. There-fore, ensuring sustainability of such systems in marginalized areas is important. This paper explains an e-Marketing strategy through a re-ward based negotiation application, aimed at improving the existing e-Commerce platform. The e-Commerce platform has been deployed for the Dwesa community. Dwesa is a rural area in the Eastern Cape prov-ince of South Africa.
- Full Text:
- Date Issued: 2009
Automated Firewall Rule Set Generation Through Passive Traffic Inspection
- Pranschke, Georg-Christian, Irwin, Barry V W, Barnett, Richard J
- Authors: Pranschke, Georg-Christian , Irwin, Barry V W , Barnett, Richard J
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428659 , vital:72527 , https://doi.org/10.1007/978-90-481-3660-5_56
- Description: Introducing rewalls and other choke point controls in existing networks is often problematic, because in the majority of cases there is already production tra c in place that cannot be interrupted. This often necessitates the time consuming manual analysis of network tra c in order to ensure that when a new system is installed, there is no disruption to legitimate ows. To improve upon this situation it is proposed that a system facilitating network tra c analysis and rewall rule set generation is developed.
- Full Text:
- Date Issued: 2009
- Authors: Pranschke, Georg-Christian , Irwin, Barry V W , Barnett, Richard J
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/428659 , vital:72527 , https://doi.org/10.1007/978-90-481-3660-5_56
- Description: Introducing rewalls and other choke point controls in existing networks is often problematic, because in the majority of cases there is already production tra c in place that cannot be interrupted. This often necessitates the time consuming manual analysis of network tra c in order to ensure that when a new system is installed, there is no disruption to legitimate ows. To improve upon this situation it is proposed that a system facilitating network tra c analysis and rewall rule set generation is developed.
- Full Text:
- Date Issued: 2009
Between a rock and a hard place:
- Authors: Keeton, Gavin
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159401 , vital:40294 , https://hdl.handle.net/10520/EJC139947
- Description: Gavin Keeton takes an economist's tour of the current crisis : how did it happen and what does it mean?
- Full Text:
- Date Issued: 2009
- Authors: Keeton, Gavin
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159401 , vital:40294 , https://hdl.handle.net/10520/EJC139947
- Description: Gavin Keeton takes an economist's tour of the current crisis : how did it happen and what does it mean?
- Full Text:
- Date Issued: 2009
Beyond just research: Experiences from Southern Africa in developing social learning partnerships for resource conservation initiatives
- Shackleton, Charlie M, Cundill, Georgina, Knight, Andrew T
- Authors: Shackleton, Charlie M , Cundill, Georgina , Knight, Andrew T
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181157 , vital:43703 , xlink:href="https://doi.org/10.1111/j.1744-7429.2009.00559.x"
- Description: There is a well-acknowledged communication or knowledge gap between scientists and decision-makers. Many scientists who take on the challenge of narrowing this gap operate on the understanding that their role is to communicate their findings in a one-way flow of information: from science to decision-makers. However, to be effective scientists must engage in an ongoing social learning process with decision-makers, and regard themselves as facilitators, and also as one among many stakeholders who have valid and important ecological knowledge. The developing world poses some particular challenges in this regard, specifically in terms of the large number of local level subsistence resources users who are important de facto decision-makers. We examine four natural resource management case studies from South Africa that differ in spatial scale and complexity, ranging from a single village to a whole biome. We distil seven lessons to help guide development of social learning processes and organizations in similar situations relating to natural resource planning and management. The lessons pertain to: maintaining ‘key individuals’ within social learning processes; the role of researchers; the formulation of research questions that social learning processes require adaptive long-term funding and capacity support; that local resource users are key decision-makers in developing countries; some perspectives on knowledge; and the need to measure research success.
- Full Text:
- Date Issued: 2009
- Authors: Shackleton, Charlie M , Cundill, Georgina , Knight, Andrew T
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181157 , vital:43703 , xlink:href="https://doi.org/10.1111/j.1744-7429.2009.00559.x"
- Description: There is a well-acknowledged communication or knowledge gap between scientists and decision-makers. Many scientists who take on the challenge of narrowing this gap operate on the understanding that their role is to communicate their findings in a one-way flow of information: from science to decision-makers. However, to be effective scientists must engage in an ongoing social learning process with decision-makers, and regard themselves as facilitators, and also as one among many stakeholders who have valid and important ecological knowledge. The developing world poses some particular challenges in this regard, specifically in terms of the large number of local level subsistence resources users who are important de facto decision-makers. We examine four natural resource management case studies from South Africa that differ in spatial scale and complexity, ranging from a single village to a whole biome. We distil seven lessons to help guide development of social learning processes and organizations in similar situations relating to natural resource planning and management. The lessons pertain to: maintaining ‘key individuals’ within social learning processes; the role of researchers; the formulation of research questions that social learning processes require adaptive long-term funding and capacity support; that local resource users are key decision-makers in developing countries; some perspectives on knowledge; and the need to measure research success.
- Full Text:
- Date Issued: 2009
Book Review : Trans : transgender life stories from South Africa, edited by Ruth Morgan, Charl Marais, and Joy R. Wellbeloved
- Authors: Morison, Tracy
- Date: 2009
- Language: English
- Type: Book review , text
- Identifier: vital:6214 , http://hdl.handle.net/10962/d1003069 , ISBN 9781920196226
- Description: ‘If you are silent about your pain, they’ll kill you and say you enjoyed it’ proclaimed author Zora Neale Hurston, writing during the US civil rights movement. Silence and pain are certainly central to the lives of many trans people. The term ‘trans’, also the book title, can be read as being inclusive of different ‘types’ of trans-identified people. The idea of transsexualism/transgenderism alone has long been unmentionable in most contexts owing to longstanding stigma and prejudice.
- Full Text:
- Date Issued: 2009
- Authors: Morison, Tracy
- Date: 2009
- Language: English
- Type: Book review , text
- Identifier: vital:6214 , http://hdl.handle.net/10962/d1003069 , ISBN 9781920196226
- Description: ‘If you are silent about your pain, they’ll kill you and say you enjoyed it’ proclaimed author Zora Neale Hurston, writing during the US civil rights movement. Silence and pain are certainly central to the lives of many trans people. The term ‘trans’, also the book title, can be read as being inclusive of different ‘types’ of trans-identified people. The idea of transsexualism/transgenderism alone has long been unmentionable in most contexts owing to longstanding stigma and prejudice.
- Full Text:
- Date Issued: 2009
Cancer stem cells in breast cancer and metastasis:
- Lawson, Jessica C, Blatch, Gregory L, Edkins, Adrienne L
- Authors: Lawson, Jessica C , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165057 , vital:41205 , DOI: 10.1007/s10549-009-0524-9
- Description: The cancer stem cell theory poses that cancers develop from a subset of malignant cells that possess stem cell characteristics and has been proposed to account for the development of a variety of malignancies, including breast cancer. These cancer stem cells (CSC) possess characteristics of both stem cells and cancer cells, in that they have the properties of self-renewal, asymmetric cell division, resistance to apoptosis, independent growth, tumourigenicity and metastatic potential. A CSC origin for breast cancer can neatly explain both the heterogeneity of breast cancers and the relapse of the tumours after treatment. However, many reports on CSC in the breast are contradictory. There is variation with respect to how breast cancer stem cells should be identified, their characteristics and a possible lack of correlation between clinical outcome and breast cancer stem cell status of a tumour. These combined factors have made breast cancer stem cells a highly contentious issue. In this review, we highlight the progress in the analysis of cancer stem cells, with an emphasis on breast cancer.
- Full Text:
- Date Issued: 2009
- Authors: Lawson, Jessica C , Blatch, Gregory L , Edkins, Adrienne L
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165057 , vital:41205 , DOI: 10.1007/s10549-009-0524-9
- Description: The cancer stem cell theory poses that cancers develop from a subset of malignant cells that possess stem cell characteristics and has been proposed to account for the development of a variety of malignancies, including breast cancer. These cancer stem cells (CSC) possess characteristics of both stem cells and cancer cells, in that they have the properties of self-renewal, asymmetric cell division, resistance to apoptosis, independent growth, tumourigenicity and metastatic potential. A CSC origin for breast cancer can neatly explain both the heterogeneity of breast cancers and the relapse of the tumours after treatment. However, many reports on CSC in the breast are contradictory. There is variation with respect to how breast cancer stem cells should be identified, their characteristics and a possible lack of correlation between clinical outcome and breast cancer stem cell status of a tumour. These combined factors have made breast cancer stem cells a highly contentious issue. In this review, we highlight the progress in the analysis of cancer stem cells, with an emphasis on breast cancer.
- Full Text:
- Date Issued: 2009
Characterization of manganese tetraarylthiosubstituted phthalocyanines self assembled monolayers
- Matemadombo, Fungisai, Durmus, Mahmut, Togo, Chamunorwa, Limson, Janice L, Nyokong, Tebello
- Authors: Matemadombo, Fungisai , Durmus, Mahmut , Togo, Chamunorwa , Limson, Janice L , Nyokong, Tebello
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/263364 , vital:53621 , xlink:href="https://doi.org/10.1016/j.electacta.2009.04.059"
- Description: Manganese tetraarylthiosubstituted phthalocyanines (complexes 1–5) have been deposited on Au electrode surfaces through the self assembled monolayer (SAM) technique. SAM characteristics reported in this work are: ion barrier factor (∼1); interfacial capacitance (303–539 μF cm−2) and surface coverage (1.06 × 10−10–2.80 × 10−10 mol cm−2). Atomic force microscopy was employed in characterizing a SAM. SAMs of complexes 1–5 were employed to detect L-cysteine (with limit of detection ranging from 2.83 × 10−7 to 3.14 × 10−7 M at potentials of 0.68–0.75 V vs. Ag|AgCl) and nitrite (limit of detection ranging from 1.78 × 10−7 to 3.02 × 10−7 M at potentials of 0.69–0.76 V vs. Ag|AgCl).
- Full Text:
- Date Issued: 2009
- Authors: Matemadombo, Fungisai , Durmus, Mahmut , Togo, Chamunorwa , Limson, Janice L , Nyokong, Tebello
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/263364 , vital:53621 , xlink:href="https://doi.org/10.1016/j.electacta.2009.04.059"
- Description: Manganese tetraarylthiosubstituted phthalocyanines (complexes 1–5) have been deposited on Au electrode surfaces through the self assembled monolayer (SAM) technique. SAM characteristics reported in this work are: ion barrier factor (∼1); interfacial capacitance (303–539 μF cm−2) and surface coverage (1.06 × 10−10–2.80 × 10−10 mol cm−2). Atomic force microscopy was employed in characterizing a SAM. SAMs of complexes 1–5 were employed to detect L-cysteine (with limit of detection ranging from 2.83 × 10−7 to 3.14 × 10−7 M at potentials of 0.68–0.75 V vs. Ag|AgCl) and nitrite (limit of detection ranging from 1.78 × 10−7 to 3.02 × 10−7 M at potentials of 0.69–0.76 V vs. Ag|AgCl).
- Full Text:
- Date Issued: 2009
Characterization of nickel tetrahydroxy phthalocyanine complexes and the electrocatalytic oxidation of 4-chlorophenol
- Khene, Samson M, Lobb, Kevin A, Nyokong, Tebello
- Authors: Khene, Samson M , Lobb, Kevin A , Nyokong, Tebello
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/263308 , vital:53616 , xlink:href="https://doi.org/10.1016/j.ica.2009.08.019"
- Description: This work reports on the use of nickel(II) tetrahydroxy (NiPc(OH)4) and (poly-Ni(OH)Pc(OH)4) phthalocyanine complexes as films on ordinary poly graphite electrode (OPGE) for the electrochemical oxidation of 4-chlorophenol (4-CP). The NiPc(OH)4 film was electrotransformed to Ni(OH)Pc(OH)4 film in aqueous 0.1 M NaOH solution to the ‘O–Ni–O oxo’ bridge form. The result showed that the Ni(OH)Pc(OH)4 film on OPGE was more electroactive in terms of increase in current and less catalytic in terms of potential compared to the adsorbed NiPc(OH)4 on OPGE. The reactivity of the two molecules was explained by theoretical calculations. The energies of the frontier orbitals of NiPc(OH)4, Ni(OH)Pc(OH)4 and 4-chlorophenol were calculated using density functional theory (DFT) method. The inter molecular hardness (η) and donor–acceptor hardness (ηDA) of Ni(OH)Pc(OH)4, NiPc(OH)4, Ni(OH)Pc(OH)4/4-chlorophenol and NiPc(OH)4/4-chlorophenol were estimated. The Ni(OH)Pc(OH)4, showed stronger interaction with 4-chlorophenol than NiPc(OH)4. DFT method was also used to model IR and Raman spectrum of H2Pc(OH)4 and NiPc(OH)4.
- Full Text:
- Date Issued: 2009
- Authors: Khene, Samson M , Lobb, Kevin A , Nyokong, Tebello
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/263308 , vital:53616 , xlink:href="https://doi.org/10.1016/j.ica.2009.08.019"
- Description: This work reports on the use of nickel(II) tetrahydroxy (NiPc(OH)4) and (poly-Ni(OH)Pc(OH)4) phthalocyanine complexes as films on ordinary poly graphite electrode (OPGE) for the electrochemical oxidation of 4-chlorophenol (4-CP). The NiPc(OH)4 film was electrotransformed to Ni(OH)Pc(OH)4 film in aqueous 0.1 M NaOH solution to the ‘O–Ni–O oxo’ bridge form. The result showed that the Ni(OH)Pc(OH)4 film on OPGE was more electroactive in terms of increase in current and less catalytic in terms of potential compared to the adsorbed NiPc(OH)4 on OPGE. The reactivity of the two molecules was explained by theoretical calculations. The energies of the frontier orbitals of NiPc(OH)4, Ni(OH)Pc(OH)4 and 4-chlorophenol were calculated using density functional theory (DFT) method. The inter molecular hardness (η) and donor–acceptor hardness (ηDA) of Ni(OH)Pc(OH)4, NiPc(OH)4, Ni(OH)Pc(OH)4/4-chlorophenol and NiPc(OH)4/4-chlorophenol were estimated. The Ni(OH)Pc(OH)4, showed stronger interaction with 4-chlorophenol than NiPc(OH)4. DFT method was also used to model IR and Raman spectrum of H2Pc(OH)4 and NiPc(OH)4.
- Full Text:
- Date Issued: 2009