Evaluation of the effectiveness of small aperture network telescopes as IBR data sources
- Authors: Chindipha, Stones Dalitso
- Date: 2023-03-31
- Subjects: Computer networks Monitoring , Computer networks Security measures , Computer bootstrapping , Time-series analysis , Regression analysis , Mathematical models
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/366264 , vital:65849 , DOI https://doi.org/10.21504/10962/366264
- Description: The use of network telescopes to collect unsolicited network traffic by monitoring unallocated address space has been in existence for over two decades. Past research has shown that there is a lot of activity happening in this unallocated space that needs monitoring as it carries threat intelligence data that has proven to be very useful in the security field. Prior to the emergence of the Internet of Things (IoT), commercialisation of IP addresses and widespread of mobile devices, there was a large pool of IPv4 addresses and thus reserving IPv4 addresses to be used for monitoring unsolicited activities going in the unallocated space was not a problem. Now, preservation of such IPv4 addresses just for monitoring is increasingly difficult as there is not enough free addresses in the IPv4 address space to be used for just monitoring. This is the case because such monitoring is seen as a ’non-productive’ use of the IP addresses. This research addresses the problem brought forth by this IPv4 address space exhaustion in relation to Internet Background Radiation (IBR) monitoring. In order to address the research questions, this research developed four mathematical models: Absolute Mean Accuracy Percentage Score (AMAPS), Symmetric Absolute Mean Accuracy Percentage Score (SAMAPS), Standardised Mean Absolute Error (SMAE), and Standardised Mean Absolute Scaled Error (SMASE). These models are used to evaluate the research objectives and quantify the variations that exist between different samples. The sample sizes represent different lens sizes of the telescopes. The study has brought to light a time series plot that shows the expected proportion of unique source IP addresses collected over time. The study also imputed data using the smaller /24 IPv4 net-block subnets to regenerate the missing data points using bootstrapping to create confidence intervals (CI). The findings from the simulated data supports the findings computed from the models. The CI offers a boost to decision making. Through a series of experiments with monthly and quarterly datasets, the study proposed a 95% - 99% confidence level to be used. It was known that large network telescopes collect more threat intelligence data than small-sized network telescopes, however, no study, to the best of our knowledge, has ever quantified such a knowledge gap. With the findings from the study, small-sized network telescope users can now use their network telescopes with full knowledge of gap that exists in the data collected between different network telescopes. , Thesis (PhD) -- Faculty of Science, Computer Science, 2023
- Full Text:
- Date Issued: 2023-03-31
- Authors: Chindipha, Stones Dalitso
- Date: 2023-03-31
- Subjects: Computer networks Monitoring , Computer networks Security measures , Computer bootstrapping , Time-series analysis , Regression analysis , Mathematical models
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/366264 , vital:65849 , DOI https://doi.org/10.21504/10962/366264
- Description: The use of network telescopes to collect unsolicited network traffic by monitoring unallocated address space has been in existence for over two decades. Past research has shown that there is a lot of activity happening in this unallocated space that needs monitoring as it carries threat intelligence data that has proven to be very useful in the security field. Prior to the emergence of the Internet of Things (IoT), commercialisation of IP addresses and widespread of mobile devices, there was a large pool of IPv4 addresses and thus reserving IPv4 addresses to be used for monitoring unsolicited activities going in the unallocated space was not a problem. Now, preservation of such IPv4 addresses just for monitoring is increasingly difficult as there is not enough free addresses in the IPv4 address space to be used for just monitoring. This is the case because such monitoring is seen as a ’non-productive’ use of the IP addresses. This research addresses the problem brought forth by this IPv4 address space exhaustion in relation to Internet Background Radiation (IBR) monitoring. In order to address the research questions, this research developed four mathematical models: Absolute Mean Accuracy Percentage Score (AMAPS), Symmetric Absolute Mean Accuracy Percentage Score (SAMAPS), Standardised Mean Absolute Error (SMAE), and Standardised Mean Absolute Scaled Error (SMASE). These models are used to evaluate the research objectives and quantify the variations that exist between different samples. The sample sizes represent different lens sizes of the telescopes. The study has brought to light a time series plot that shows the expected proportion of unique source IP addresses collected over time. The study also imputed data using the smaller /24 IPv4 net-block subnets to regenerate the missing data points using bootstrapping to create confidence intervals (CI). The findings from the simulated data supports the findings computed from the models. The CI offers a boost to decision making. Through a series of experiments with monthly and quarterly datasets, the study proposed a 95% - 99% confidence level to be used. It was known that large network telescopes collect more threat intelligence data than small-sized network telescopes, however, no study, to the best of our knowledge, has ever quantified such a knowledge gap. With the findings from the study, small-sized network telescope users can now use their network telescopes with full knowledge of gap that exists in the data collected between different network telescopes. , Thesis (PhD) -- Faculty of Science, Computer Science, 2023
- Full Text:
- Date Issued: 2023-03-31
Youth, political violence and ZANU-PF politics in Zimbabwe, c.1950-2018
- Authors: Munyarari, Tinashe
- Date: 2022-10-14
- Subjects: Youth protest movements Zimbabwe , Political violence Zimbabwe , ZANU-PF (Organization : Zimbabwe) , Agent (Philosophy) , Zimbabwe Politics and government , Zimbabwe History
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/365966 , vital:65806 , DOI https://doi.org/10.21504/10962/365966
- Description: This study is a socio-political aspect of Zimbabwean history. It examines the development of youth political violence starting from the late 1950s when violent forms of African political mobilisation emerged to 2018 when the first election without Robert Mugabe was held. It explores how early nationalist parties such as the Salisbury City Youth League (SCYL), Southern Rhodesia African National Congress (SRANC), National Democratic Party (NDP), Zimbabwe African People’s Union (ZAPU) and later the Zimbabwe African National Union (ZANU) mobilised and socialised youths into political violence to understand the roots of the violent political culture in Zimbabwe. This study shows that youths were an important part of the strategies of these political parties in countering the violence of the colonial state as well as mobilising mass support for the movements during the liberation struggle. It reveals that war collaborators (mujibhas and chimbwidos) were central role players in instigating political violence against innocent and defenceless people during the war. In the 1980s and 1990s, the Youth brigades and the ZANU-PF Youth League became a key constituent for state-socialist developmental goals but they were at times manipulated as a resource for political violence when Mugabe’s power was challenged. The study shows that more grotesque violence occurred in the 2000s era when the National Youth Service (NYS) was introduced and state-sanctioned vigilante groups like Chipangano in Mbare emerged in response to the rise of the Movement for Democratic Change (MDC) and diminishing of consensual power. This study argues that youth were not mere victims and perpetrators of political violence, but they were a collection of various interest sub-groups with diverse agendas and a sense of agency. Some joined violent groups for their social mobility, power, impunity and economic opportunities availed to the group members. Data for this study was drawn from Mbare and Highfields (in Harare Province) and Uzumba-Maramba-Pfungwe (in Mashonaland East Province). , Thesis (PhD) -- Faculty of Humanities, History, 2022
- Full Text:
- Date Issued: 2022-10-14
- Authors: Munyarari, Tinashe
- Date: 2022-10-14
- Subjects: Youth protest movements Zimbabwe , Political violence Zimbabwe , ZANU-PF (Organization : Zimbabwe) , Agent (Philosophy) , Zimbabwe Politics and government , Zimbabwe History
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/365966 , vital:65806 , DOI https://doi.org/10.21504/10962/365966
- Description: This study is a socio-political aspect of Zimbabwean history. It examines the development of youth political violence starting from the late 1950s when violent forms of African political mobilisation emerged to 2018 when the first election without Robert Mugabe was held. It explores how early nationalist parties such as the Salisbury City Youth League (SCYL), Southern Rhodesia African National Congress (SRANC), National Democratic Party (NDP), Zimbabwe African People’s Union (ZAPU) and later the Zimbabwe African National Union (ZANU) mobilised and socialised youths into political violence to understand the roots of the violent political culture in Zimbabwe. This study shows that youths were an important part of the strategies of these political parties in countering the violence of the colonial state as well as mobilising mass support for the movements during the liberation struggle. It reveals that war collaborators (mujibhas and chimbwidos) were central role players in instigating political violence against innocent and defenceless people during the war. In the 1980s and 1990s, the Youth brigades and the ZANU-PF Youth League became a key constituent for state-socialist developmental goals but they were at times manipulated as a resource for political violence when Mugabe’s power was challenged. The study shows that more grotesque violence occurred in the 2000s era when the National Youth Service (NYS) was introduced and state-sanctioned vigilante groups like Chipangano in Mbare emerged in response to the rise of the Movement for Democratic Change (MDC) and diminishing of consensual power. This study argues that youth were not mere victims and perpetrators of political violence, but they were a collection of various interest sub-groups with diverse agendas and a sense of agency. Some joined violent groups for their social mobility, power, impunity and economic opportunities availed to the group members. Data for this study was drawn from Mbare and Highfields (in Harare Province) and Uzumba-Maramba-Pfungwe (in Mashonaland East Province). , Thesis (PhD) -- Faculty of Humanities, History, 2022
- Full Text:
- Date Issued: 2022-10-14
Representations of trauma by three women writers from the global south
- Authors: Pabel, Annemarie Luise
- Date: 2020-04
- Subjects: Women authors (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctor's theses , text
- Identifier: http://hdl.handle.net/10948/55128 , vital:49131
- Description: This study examines modalities of psychological trauma in selected works by three women writers from the global South: the Scottish-Sierra Leonean writer Aminatta Forna, the ChileanAmerican author Isabel Allende and Anuradha Roy from India. It aims to examine textual manifestations of complex and prolonged experiences of trauma and the ways in which literary forms facilitate such representations. Specifically, I am interested in multi-layered and interrelated forms of trauma which exceed the conventional, event-based conceptualization of trauma as an “overwhelming experience of sudden or catastrophic events” (Caruth 1996:11). 1 Such experiences include war, exile, extensive childhood sexual abuse, maternal bereavement and familial disintegration. I have selected three texts from each author’s body of literary work: Forna’s memoir The Devil that Danced on the Water: a Daughter’s Quest (2003) and her novels The Memory of Love (2010) and Happiness (2010), Allende’s memoirs Paula (1994), My Invented Country (2004) and Portrait in Sepia (2000) and Roy’s novels An Atlas of Impossible Longing (2008), Sleeping on Jupiter (2015) and All the Lives We Never Lived (2018). The study’s focus on women writers from different contexts in the global South is motivated by an imbalance in critical attention and validation extreme forms of suffering receive globally. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
- Authors: Pabel, Annemarie Luise
- Date: 2020-04
- Subjects: Women authors (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctor's theses , text
- Identifier: http://hdl.handle.net/10948/55128 , vital:49131
- Description: This study examines modalities of psychological trauma in selected works by three women writers from the global South: the Scottish-Sierra Leonean writer Aminatta Forna, the ChileanAmerican author Isabel Allende and Anuradha Roy from India. It aims to examine textual manifestations of complex and prolonged experiences of trauma and the ways in which literary forms facilitate such representations. Specifically, I am interested in multi-layered and interrelated forms of trauma which exceed the conventional, event-based conceptualization of trauma as an “overwhelming experience of sudden or catastrophic events” (Caruth 1996:11). 1 Such experiences include war, exile, extensive childhood sexual abuse, maternal bereavement and familial disintegration. I have selected three texts from each author’s body of literary work: Forna’s memoir The Devil that Danced on the Water: a Daughter’s Quest (2003) and her novels The Memory of Love (2010) and Happiness (2010), Allende’s memoirs Paula (1994), My Invented Country (2004) and Portrait in Sepia (2000) and Roy’s novels An Atlas of Impossible Longing (2008), Sleeping on Jupiter (2015) and All the Lives We Never Lived (2018). The study’s focus on women writers from different contexts in the global South is motivated by an imbalance in critical attention and validation extreme forms of suffering receive globally. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
Development and assessment of a fixed dose combination of perindopril arginine and indapamide loaded microparticles
- Authors: Mandava, Tavonga Tyomai
- Date: 2020
- Subjects: Uncatalogued
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/164413 , vital:41116
- Description: Thesis (MSc)--Rhodes University, Faculty of Pharmacy, Pharmaceutics, 2020
- Full Text:
- Date Issued: 2020
- Authors: Mandava, Tavonga Tyomai
- Date: 2020
- Subjects: Uncatalogued
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/164413 , vital:41116
- Description: Thesis (MSc)--Rhodes University, Faculty of Pharmacy, Pharmaceutics, 2020
- Full Text:
- Date Issued: 2020
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