Development of a web-based interface for a wireless sensor network monitoring system
- Authors: Gumbo, Sibukele
- Date: 2007
- Subjects: Wireless LAN , Sensor networks , Wireless communication systems , Web sites -- Design , User interfaces (Computer systems)
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: vital:11372 , http://hdl.handle.net/10353/68 , Wireless LAN , Sensor networks , Wireless communication systems , Web sites -- Design , User interfaces (Computer systems)
- Description: In the recent past, wireless sensor technology has undergone advancements in its autonomous data collecting aspects, and has become an area worth investigating in relation to structural monitoring applications. The system described in this thesis aims at acquiring, storing and displaying overhead transmission line related data collected from a wireless sensor network. Open source tools were used in its development and implementation. The inherent linearly aligned topology of transmission line monitoring devices is not without shortcomings; hence analysis of linear node placement, hardware and software components was carried out to determine the feasibility of the system. Their limited data processing capabilities has motivated the development of a post processing wireless sensor application in order to present any collected structural data in an understandable format.
- Full Text:
- Authors: Gumbo, Sibukele
- Date: 2007
- Subjects: Wireless LAN , Sensor networks , Wireless communication systems , Web sites -- Design , User interfaces (Computer systems)
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: vital:11372 , http://hdl.handle.net/10353/68 , Wireless LAN , Sensor networks , Wireless communication systems , Web sites -- Design , User interfaces (Computer systems)
- Description: In the recent past, wireless sensor technology has undergone advancements in its autonomous data collecting aspects, and has become an area worth investigating in relation to structural monitoring applications. The system described in this thesis aims at acquiring, storing and displaying overhead transmission line related data collected from a wireless sensor network. Open source tools were used in its development and implementation. The inherent linearly aligned topology of transmission line monitoring devices is not without shortcomings; hence analysis of linear node placement, hardware and software components was carried out to determine the feasibility of the system. Their limited data processing capabilities has motivated the development of a post processing wireless sensor application in order to present any collected structural data in an understandable format.
- Full Text:
Rural internet connectivity: a development in Dwesa-Cwebe, Eastern Cape, South Africa
- Authors: Mandioma, Martin
- Date: 2007
- Subjects: Internet -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: vital:11376 , http://hdl.handle.net/10353/78 , Internet -- South Africa -- Eastern Cape
- Description: This thesis presents aspects of Internet connectivity in rural South Africa. The work looks at government initiatives being undertaken to connect rural communities to up-to-date information networks. Various projects that seek to connect rural areas of South Africa, as well as other remote areas around the world, are discussed. These projects present many novel ideas that have been successfully used to link rural communities in remote areas with the information age. In particular, wired and wireless access technologies that can be implemented to connect remote communities to the Internet are discussed. A field test utilizing GPRS, VSAT and WiMAX was implemented in Dwesa-Cwebe, Eastern Cape Province, South Africa. VSAT proved to offer better Internet connectivity in terms of throughput and latency. WiMAX was then successfully implemented to relay the signal over the remote area of Dwesa-Cwebe, thus effectively providing Internet connectivity to an area with limited cell phone coverage and no telephone lines.
- Full Text:
- Authors: Mandioma, Martin
- Date: 2007
- Subjects: Internet -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: vital:11376 , http://hdl.handle.net/10353/78 , Internet -- South Africa -- Eastern Cape
- Description: This thesis presents aspects of Internet connectivity in rural South Africa. The work looks at government initiatives being undertaken to connect rural communities to up-to-date information networks. Various projects that seek to connect rural areas of South Africa, as well as other remote areas around the world, are discussed. These projects present many novel ideas that have been successfully used to link rural communities in remote areas with the information age. In particular, wired and wireless access technologies that can be implemented to connect remote communities to the Internet are discussed. A field test utilizing GPRS, VSAT and WiMAX was implemented in Dwesa-Cwebe, Eastern Cape Province, South Africa. VSAT proved to offer better Internet connectivity in terms of throughput and latency. WiMAX was then successfully implemented to relay the signal over the remote area of Dwesa-Cwebe, thus effectively providing Internet connectivity to an area with limited cell phone coverage and no telephone lines.
- Full Text:
The classification of some fuzzy subgroups of finite groups under a natural equivalence and its extension, with particular emphasis on the number of equivalence classes
- Authors: Ndiweni, Odilo
- Date: 2007
- Subjects: Fuzzy sets , Maximal functions , Finite groups , Equivalence classes (Set theory)
- Language: English
- Type: Thesis , Masters , M Sc (Mathematics)
- Identifier: vital:11587 , http://hdl.handle.net/10353/88 , Fuzzy sets , Maximal functions , Finite groups , Equivalence classes (Set theory)
- Description: In this thesis we use the natural equivalence of fuzzy subgroups studied by Murali and Makamba [25] to characterize fuzzy subgroups of some finite groups. We focus on the determination of the number of equivalence classes of fuzzy subgroups of some selected finite groups using this equivalence relation and its extension. Firstly we give a brief discussion on the theory of fuzzy sets and fuzzy subgroups. We prove a few properties of fuzzy sets and fuzzy subgroups. We then introduce the selected groups namely the symmetric group 3 S , dihedral group 4 D , the quaternion group Q8 , cyclic p-group pn G = Z/ , pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . We also present their subgroups structures and construct lattice diagrams of subgroups in order to study their maximal chains. We compute the number of maximal chains and give a brief explanation on how the maximal chains are used in the determination of the number of equivalence classes of fuzzy subgroups. In determining the number of equivalence classes of fuzzy subgroups of a group, we first list down all the maximal chains of the group. Secondly we pick any maximal chain and compute the number of distinct fuzzy subgroups represented by that maximal chain, expressing each fuzzy subgroup in the form of a keychain. Thereafter we pick the next maximal chain and count the number of equivalence classes of fuzzy subgroups not counted in the first chain. We proceed inductively until all the maximal chains have been exhausted. The total number of fuzzy subgroups obtained in all the maximal chains represents the number of equivalence classes of fuzzy subgroups for the entire group, (see sections 3.2.1, 3.2.2, 3.2.6, 3.2.8, 3.2.9, 3.2.15, 3.16 and 3.17 for the case of selected finite groups). We study, establish and prove the formulae for the number of maximal chains for the groups pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . To accomplish this, we use lattice diagrams of subgroups of these groups to identify the maximal chains. For instance, the group pn qm G = Z/ + Z/ would require the use of a 2- dimensional rectangular diagram (see section 3.2.18 and 5.3.5), while for the group pn qm r s G = Z/ + Z/ + Z/ we execute 3- dimensional lattice diagrams of subgroups (see section 5.4.2, 5.4.3, 5.4.4, 5.4.5 and 5.4.6). It is through these lattice diagrams that we identify routes through which to carry out the extensions. Since fuzzy subgroups represented by maximal chains are viewed as keychains, we give a brief discussion on the notion of keychains, pins and their extensions. We present propositions and proofs on why this counting technique is justifiable. We derive and prove formulae for the number of equivalence classes of the groups pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . We give a detailed explanation and illustrations on how this keychain extension principle works in Chapter Five. We conclude by giving specific illustrations on how we compute the number of equivalence classes of a fuzzy subgroup for the group p2 q2 r 2 G = Z/ + Z/ + Z/ from the number of fuzzy subgroups of the group p q r G = Z/ + Z/ + Z/ 1 2 2 . This illustrates a general technique of computing the number of fuzzy subgroups of G = Z/ + Z/ + Z/ from the number of fuzzy subgroups of 1 -1 = / + / + / pn qm r s G Z Z Z . Our illustration also shows two ways of extending from a lattice diagram of 1 G to that of G .
- Full Text:
- Authors: Ndiweni, Odilo
- Date: 2007
- Subjects: Fuzzy sets , Maximal functions , Finite groups , Equivalence classes (Set theory)
- Language: English
- Type: Thesis , Masters , M Sc (Mathematics)
- Identifier: vital:11587 , http://hdl.handle.net/10353/88 , Fuzzy sets , Maximal functions , Finite groups , Equivalence classes (Set theory)
- Description: In this thesis we use the natural equivalence of fuzzy subgroups studied by Murali and Makamba [25] to characterize fuzzy subgroups of some finite groups. We focus on the determination of the number of equivalence classes of fuzzy subgroups of some selected finite groups using this equivalence relation and its extension. Firstly we give a brief discussion on the theory of fuzzy sets and fuzzy subgroups. We prove a few properties of fuzzy sets and fuzzy subgroups. We then introduce the selected groups namely the symmetric group 3 S , dihedral group 4 D , the quaternion group Q8 , cyclic p-group pn G = Z/ , pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . We also present their subgroups structures and construct lattice diagrams of subgroups in order to study their maximal chains. We compute the number of maximal chains and give a brief explanation on how the maximal chains are used in the determination of the number of equivalence classes of fuzzy subgroups. In determining the number of equivalence classes of fuzzy subgroups of a group, we first list down all the maximal chains of the group. Secondly we pick any maximal chain and compute the number of distinct fuzzy subgroups represented by that maximal chain, expressing each fuzzy subgroup in the form of a keychain. Thereafter we pick the next maximal chain and count the number of equivalence classes of fuzzy subgroups not counted in the first chain. We proceed inductively until all the maximal chains have been exhausted. The total number of fuzzy subgroups obtained in all the maximal chains represents the number of equivalence classes of fuzzy subgroups for the entire group, (see sections 3.2.1, 3.2.2, 3.2.6, 3.2.8, 3.2.9, 3.2.15, 3.16 and 3.17 for the case of selected finite groups). We study, establish and prove the formulae for the number of maximal chains for the groups pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . To accomplish this, we use lattice diagrams of subgroups of these groups to identify the maximal chains. For instance, the group pn qm G = Z/ + Z/ would require the use of a 2- dimensional rectangular diagram (see section 3.2.18 and 5.3.5), while for the group pn qm r s G = Z/ + Z/ + Z/ we execute 3- dimensional lattice diagrams of subgroups (see section 5.4.2, 5.4.3, 5.4.4, 5.4.5 and 5.4.6). It is through these lattice diagrams that we identify routes through which to carry out the extensions. Since fuzzy subgroups represented by maximal chains are viewed as keychains, we give a brief discussion on the notion of keychains, pins and their extensions. We present propositions and proofs on why this counting technique is justifiable. We derive and prove formulae for the number of equivalence classes of the groups pn qm G = Z/ + Z/ , p q r G Z Z Z n m = / + / + / and pn qm r s G = Z/ + Z/ + Z/ where p,q and r are distinct primes and n,m, s Î N/ . We give a detailed explanation and illustrations on how this keychain extension principle works in Chapter Five. We conclude by giving specific illustrations on how we compute the number of equivalence classes of a fuzzy subgroup for the group p2 q2 r 2 G = Z/ + Z/ + Z/ from the number of fuzzy subgroups of the group p q r G = Z/ + Z/ + Z/ 1 2 2 . This illustrates a general technique of computing the number of fuzzy subgroups of G = Z/ + Z/ + Z/ from the number of fuzzy subgroups of 1 -1 = / + / + / pn qm r s G Z Z Z . Our illustration also shows two ways of extending from a lattice diagram of 1 G to that of G .
- Full Text:
Gender perceptual differences and their effects on the implementation of policy in the prevention of HIV/AIDS in Makoni District, Zimbabwe
- Authors: Musabaeka, True Shame
- Date: 2006
- Subjects: AIDS (Disease) in women -- Zimbabwe , Sexually transmitted diseases -- Zimbabwe , Sexual consent -- Zimbabwe , Sexual behavior surveys -- Zimbabwe , Social perception -- Zimbabwe
- Language: English
- Type: Thesis , Masters , M Soc Sc (Dev)
- Identifier: vital:11406 , http://hdl.handle.net/10353/308 , AIDS (Disease) in women -- Zimbabwe , Sexually transmitted diseases -- Zimbabwe , Sexual consent -- Zimbabwe , Sexual behavior surveys -- Zimbabwe , Social perception -- Zimbabwe
- Description: This study sought to establish gender perceptual differences and their effects on the implementation of Policy in the prevention of HIV/AIDS in Makoni District, Zimbabwe. The role of women as caregivers to HIV/AIDS sufferers is also highlighted and how this has deprived them towards social, political and economic development. The source of the data used was the World Health Organisation (WHO) project on Family Planning and AIDS. The sample of the study comprised of 100 men and women from Makoni District, Zimbabwe. In addition to the survey question, focus group discussions (FGDs) were conducted. The FGD data complimented the survey results with qualitative information. The objectives of the study looked at people’s attitudes, cultural practices and sexual practices. These were analysed to determine how the gender issues within them affected the HIV/AIDS prevention strategies. The five major prevention strategies focused on in this study are: · promotion of condom use; · reduction of the number of sexual partners; · sticking to one sexual partner; · control and Treatment of Sexually Transmitted Diseases (STDs); and · Voluntary Counseling and Testing (VCT) for HIV to prevent vertical transmission of the disease. Although, the majority of the women indicated that it was acceptable for a married woman to ask her husband to use condoms, this was disputed by the findings from the FGDs. Issues of trust and fidelity were raised,but many men and women reported that they were not prepared to confront one another. The FGD results revealed that the men assert that it is normal for every man to have extra marital relationships, therefore they do not see anything wrong with it. It also came out that there are women who both have no income or partner to support them financially and are living in absolute poverty. These women, if anything, are more likely to increase the number of their sexual partners than reduce them so that they increase their economic base inorder to support their families. It has been established that for effective treatment and control of STDs, there is need for both partners to cooperate and seek treatment at the same time. However, the findings from this study revealed that lack of communication between sexual partners hampered the treatment of these diseases. On the other hand, the men indicated that talking to their wives about STDs would compel them to say where they got it. On the other hand the women reported that their men would accuse them of infidelity if they told them of an STD. FGD results however revealed that men and women were prepared to have HIV testing so that they would know of their status before planning a family. The gender perceptual differences on HIV/AIDS prevention have been identified as follows: · the need for male compliance to use condoms effectively; · the fear of losing trust by suggesting condom use; and · acceptance of male promiscuity by society that perpetuates that risky behaviour and exposure to HIV/AIDS infection and lack of communication between sexual partners, are a hindrance for effective control and treatment of STDs.
- Full Text:
- Authors: Musabaeka, True Shame
- Date: 2006
- Subjects: AIDS (Disease) in women -- Zimbabwe , Sexually transmitted diseases -- Zimbabwe , Sexual consent -- Zimbabwe , Sexual behavior surveys -- Zimbabwe , Social perception -- Zimbabwe
- Language: English
- Type: Thesis , Masters , M Soc Sc (Dev)
- Identifier: vital:11406 , http://hdl.handle.net/10353/308 , AIDS (Disease) in women -- Zimbabwe , Sexually transmitted diseases -- Zimbabwe , Sexual consent -- Zimbabwe , Sexual behavior surveys -- Zimbabwe , Social perception -- Zimbabwe
- Description: This study sought to establish gender perceptual differences and their effects on the implementation of Policy in the prevention of HIV/AIDS in Makoni District, Zimbabwe. The role of women as caregivers to HIV/AIDS sufferers is also highlighted and how this has deprived them towards social, political and economic development. The source of the data used was the World Health Organisation (WHO) project on Family Planning and AIDS. The sample of the study comprised of 100 men and women from Makoni District, Zimbabwe. In addition to the survey question, focus group discussions (FGDs) were conducted. The FGD data complimented the survey results with qualitative information. The objectives of the study looked at people’s attitudes, cultural practices and sexual practices. These were analysed to determine how the gender issues within them affected the HIV/AIDS prevention strategies. The five major prevention strategies focused on in this study are: · promotion of condom use; · reduction of the number of sexual partners; · sticking to one sexual partner; · control and Treatment of Sexually Transmitted Diseases (STDs); and · Voluntary Counseling and Testing (VCT) for HIV to prevent vertical transmission of the disease. Although, the majority of the women indicated that it was acceptable for a married woman to ask her husband to use condoms, this was disputed by the findings from the FGDs. Issues of trust and fidelity were raised,but many men and women reported that they were not prepared to confront one another. The FGD results revealed that the men assert that it is normal for every man to have extra marital relationships, therefore they do not see anything wrong with it. It also came out that there are women who both have no income or partner to support them financially and are living in absolute poverty. These women, if anything, are more likely to increase the number of their sexual partners than reduce them so that they increase their economic base inorder to support their families. It has been established that for effective treatment and control of STDs, there is need for both partners to cooperate and seek treatment at the same time. However, the findings from this study revealed that lack of communication between sexual partners hampered the treatment of these diseases. On the other hand, the men indicated that talking to their wives about STDs would compel them to say where they got it. On the other hand the women reported that their men would accuse them of infidelity if they told them of an STD. FGD results however revealed that men and women were prepared to have HIV testing so that they would know of their status before planning a family. The gender perceptual differences on HIV/AIDS prevention have been identified as follows: · the need for male compliance to use condoms effectively; · the fear of losing trust by suggesting condom use; and · acceptance of male promiscuity by society that perpetuates that risky behaviour and exposure to HIV/AIDS infection and lack of communication between sexual partners, are a hindrance for effective control and treatment of STDs.
- Full Text:
Factors contributing to relapse of adult drug users in Buffalo City Municipality Metropolitan, South Africa
- Authors: Charlie, Thobeka V
- Date: 20xx
- Subjects: Substance abuse
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/18380 , vital:42258
- Description: According to the WHO [2014], one in every 14 people is regular users of drugs, adding up to a total of 3.74 million people (taken as a percentage of the population as of 2013). While the United Nations Office on Drug Crimes (UNDOC) revealed that in 2015, 167,750 people have died due to direct use of drugs, the patterns of drug use have increased from 1.3% to 9.8% in 2018 (UNDOC, 2018:49-51). The Eastern Cape is one of the poorest provinces of South Africa characterized by a poor primary and secondary education system, a lack of basic facilities, and poor transport infrastructure. It is evident that South Africa in general, and the Eastern Cape in particular, is experiencing a major problem with drug and substance abuse, which is especially common in school-going children. Furthermore, the Eastern Cape have limited access to specialized drug rehabilitative services due to the geographical location of existing services and the cost associated with travelling. Rehabilitation centres are available in both the State-funded and privately-owned institutions, yet the researcher was perplexed as to why, despite the proven effectiveness of the rehabilitation program in the private health care facility, relapse of the drug abusers in the Eastern Cape continues to occur. This study aimed to explore and describe the reasons why adult drug abusers who previously completed a detoxification program at Clinic A in Buffalo City Municipality, relapse after discharge. Understanding the reasons or factors of relapse assisted in the formulation of recommendations to adjust the program and prevent or reduce relapses. In this study, a qualitative, descriptive, contextual and exploratory, qualitative research design was followed to gain insight into and understand the reasons that contributed to the relapse of the adult drug abuser in a private health care facility in the Eastern Cape. 9 The population was defined as the entire group of persons who met the inclusion criteria, who relapsed after successful completion of a drug detoxification program. The sample consisted of 25 relapsed persons who were willing to participate. In Phase 1 of the study, the researcher invited relapsed adult abusers who were readmitted for the detoxification program from January to December 2019 to participate in an individual interview. The data was then reduced into patterns, categories and themes by clustering and coding the data according to Tesch’s steps of analysis. In Phase 2 of the study, the researcher critically analysed the detoxification program currently used in the private health care facility. National and international articles and best-practice standards were also consulted. Finally, a literature control was done to place the findings of the study in the context of what was already known. In the phenomenology, the literature should be reviewed after data collection and analysis so that the information in the literature does not influence the researcher in any way. In phase 3 of the study, the researcher wrote recommendations to improve the detoxification program at Clinic A [BCM].
- Full Text:
- Authors: Charlie, Thobeka V
- Date: 20xx
- Subjects: Substance abuse
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/18380 , vital:42258
- Description: According to the WHO [2014], one in every 14 people is regular users of drugs, adding up to a total of 3.74 million people (taken as a percentage of the population as of 2013). While the United Nations Office on Drug Crimes (UNDOC) revealed that in 2015, 167,750 people have died due to direct use of drugs, the patterns of drug use have increased from 1.3% to 9.8% in 2018 (UNDOC, 2018:49-51). The Eastern Cape is one of the poorest provinces of South Africa characterized by a poor primary and secondary education system, a lack of basic facilities, and poor transport infrastructure. It is evident that South Africa in general, and the Eastern Cape in particular, is experiencing a major problem with drug and substance abuse, which is especially common in school-going children. Furthermore, the Eastern Cape have limited access to specialized drug rehabilitative services due to the geographical location of existing services and the cost associated with travelling. Rehabilitation centres are available in both the State-funded and privately-owned institutions, yet the researcher was perplexed as to why, despite the proven effectiveness of the rehabilitation program in the private health care facility, relapse of the drug abusers in the Eastern Cape continues to occur. This study aimed to explore and describe the reasons why adult drug abusers who previously completed a detoxification program at Clinic A in Buffalo City Municipality, relapse after discharge. Understanding the reasons or factors of relapse assisted in the formulation of recommendations to adjust the program and prevent or reduce relapses. In this study, a qualitative, descriptive, contextual and exploratory, qualitative research design was followed to gain insight into and understand the reasons that contributed to the relapse of the adult drug abuser in a private health care facility in the Eastern Cape. 9 The population was defined as the entire group of persons who met the inclusion criteria, who relapsed after successful completion of a drug detoxification program. The sample consisted of 25 relapsed persons who were willing to participate. In Phase 1 of the study, the researcher invited relapsed adult abusers who were readmitted for the detoxification program from January to December 2019 to participate in an individual interview. The data was then reduced into patterns, categories and themes by clustering and coding the data according to Tesch’s steps of analysis. In Phase 2 of the study, the researcher critically analysed the detoxification program currently used in the private health care facility. National and international articles and best-practice standards were also consulted. Finally, a literature control was done to place the findings of the study in the context of what was already known. In the phenomenology, the literature should be reviewed after data collection and analysis so that the information in the literature does not influence the researcher in any way. In phase 3 of the study, the researcher wrote recommendations to improve the detoxification program at Clinic A [BCM].
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Hegemonic conceptualisations of contestation in the Middle East: a case study of Iraq
- Authors: Kwitshi, Aviwe
- Date: 200
- Subjects: Terrorism Insurgency
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Political Science)
- Identifier: http://hdl.handle.net/10353/18130 , vital:42235
- Description: This dissertation illustrated how the production of discourse defining ‘terrorism’ evolved after the emergence of the United States as hegemon, a position that enabled it to develop meaning narratives to arrive at discursive constructs that were selfrewarding, in that they justified its invasion of Iraq in 2003. This study was able to analyse the construction of the ‘war on terror’ discourse used about the Middle East (ME) as a result of the US hegemonic position, using both Gramsci’s analysis of discourse and Foucault’s concepts of power relations. Gramsci proposes the production of discourses through the concept of ’hegemony’. On the other hand, for Foucault (1980: 93), ‘‘relations of power cannot in themselves be established, consolidated nor implemented without the production, accumulation, circulation and functioning of a discourse’’. This study focuses on the period after World War II, drawing on events in the Middle East, in particular Iraq, and examining the influence of the US in the region during this period. In addition, this study addresses the conceptualisation of ‘terrorism’ and discourse around this phenomenon as a function of power and a generally accepted outcome of the exercise of hegemony. The study illustrates how power works through discourse based on Foucault’s conceptualisation of the relationship between power and discourse, and the hegemon’s intention of utilising its discursive power in shaping the views and actions of others.
- Full Text:
- Authors: Kwitshi, Aviwe
- Date: 200
- Subjects: Terrorism Insurgency
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Political Science)
- Identifier: http://hdl.handle.net/10353/18130 , vital:42235
- Description: This dissertation illustrated how the production of discourse defining ‘terrorism’ evolved after the emergence of the United States as hegemon, a position that enabled it to develop meaning narratives to arrive at discursive constructs that were selfrewarding, in that they justified its invasion of Iraq in 2003. This study was able to analyse the construction of the ‘war on terror’ discourse used about the Middle East (ME) as a result of the US hegemonic position, using both Gramsci’s analysis of discourse and Foucault’s concepts of power relations. Gramsci proposes the production of discourses through the concept of ’hegemony’. On the other hand, for Foucault (1980: 93), ‘‘relations of power cannot in themselves be established, consolidated nor implemented without the production, accumulation, circulation and functioning of a discourse’’. This study focuses on the period after World War II, drawing on events in the Middle East, in particular Iraq, and examining the influence of the US in the region during this period. In addition, this study addresses the conceptualisation of ‘terrorism’ and discourse around this phenomenon as a function of power and a generally accepted outcome of the exercise of hegemony. The study illustrates how power works through discourse based on Foucault’s conceptualisation of the relationship between power and discourse, and the hegemon’s intention of utilising its discursive power in shaping the views and actions of others.
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Modelling false positive reduction in maritime object detection
- Authors: Nkele, Nosiphiwo
- Date: 20xx
- Subjects: Computer vision Neural networks (Computer science)
- Language: English
- Type: Thesis , Masters , MSc (Computer Science )
- Identifier: http://hdl.handle.net/10353/17168 , vital:40862
- Description: Target detection has become a very significant research area in computer vision with its applications in military, maritime surveillance, and defense and security. Maritime target detection during critical sea conditions produces a number of false positives when using the existing algorithms due to sea waves, dynamic nature of the ocean, camera motion, sea glint, sensor noise, sea spray, swell and the presence of birds. The main question that has been addressed in this research is how can object detection be improved in maritime environment by reducing false positives and promoting detection rate. Most of Previous work on object detection still fails to address the problem of false positives and false negatives due to background clutter. Most of the researchers tried to reduce false positives by applying filters but filtering degrades the quality of an image leading to more false alarms during detection. As much as radar technology has previously been the most utilized method, it still fails to detect very small objects and it may be applied in special circumstances. In trying to improve the implementation of target detection in maritime, empirical research method was proposed to answer questions about existing target detection algorithms and techniques used to reduce false positives in object detection. Visible images were retrained on a pre-trained Faster R-CNN with inception v2. The pre-trained model was retrained on five different sample data with increasing size, however for the last two samples the data was duplicated to increase size. For testing purposes 20 test images were utilized to evaluate all the models. The results of this study showed that the deep learning method used performed best in detecting maritime vessels and the increase of dataset improved detection performance and false positives were reduced. The duplication of images did not yield the best results; however, the results were promising for the first three models with increasing data.
- Full Text:
- Authors: Nkele, Nosiphiwo
- Date: 20xx
- Subjects: Computer vision Neural networks (Computer science)
- Language: English
- Type: Thesis , Masters , MSc (Computer Science )
- Identifier: http://hdl.handle.net/10353/17168 , vital:40862
- Description: Target detection has become a very significant research area in computer vision with its applications in military, maritime surveillance, and defense and security. Maritime target detection during critical sea conditions produces a number of false positives when using the existing algorithms due to sea waves, dynamic nature of the ocean, camera motion, sea glint, sensor noise, sea spray, swell and the presence of birds. The main question that has been addressed in this research is how can object detection be improved in maritime environment by reducing false positives and promoting detection rate. Most of Previous work on object detection still fails to address the problem of false positives and false negatives due to background clutter. Most of the researchers tried to reduce false positives by applying filters but filtering degrades the quality of an image leading to more false alarms during detection. As much as radar technology has previously been the most utilized method, it still fails to detect very small objects and it may be applied in special circumstances. In trying to improve the implementation of target detection in maritime, empirical research method was proposed to answer questions about existing target detection algorithms and techniques used to reduce false positives in object detection. Visible images were retrained on a pre-trained Faster R-CNN with inception v2. The pre-trained model was retrained on five different sample data with increasing size, however for the last two samples the data was duplicated to increase size. For testing purposes 20 test images were utilized to evaluate all the models. The results of this study showed that the deep learning method used performed best in detecting maritime vessels and the increase of dataset improved detection performance and false positives were reduced. The duplication of images did not yield the best results; however, the results were promising for the first three models with increasing data.
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Poverty alleviation strategies and their impact on the livelihoods in Gqumahashe Village (Alice, Eastern Cape) South Africa
- Authors: Thengela, Ntombizanele
- Date: 20xx
- Subjects: Poverty Alleviation
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10353/18291 , vital:42249
- Description: There are between forty-five to fifty-seven percent (45-57%), South Africans who are engulfed in poverty. In an attempt to identify policy instruments that could help change the status quo, the South African government introduced various strategies to alleviate poverty and some have been seen to be relatively successful. The aim of the study was to identify poverty alleviation strategies in Gqhumahashe village and their impact on the livelihoods of the inhabitants. A qualitative approach and a phenomenological research design were used in conducting this study as these approaches allowed participants to share first-hand experiences regarding the issue under investigation. Purposive sampling method was employed to select participants for the study. Twenty-five participants were selected to participate in this study to share their experience as beneficiaries of these poverty alleviation programmes. The data obtained through in-depth interviews were analysed thematically as well as discussed and supported by the relevant literature. Thematic analysis was used to analyse audiotaped interviews. The findings revealed that there are poverty alleviation strategies in place in Gqhumahashe village. Those strategies include free basic and higher education, school feeding schemes, early childhood development and Kari-Gude literacy programmes for elderly. There are also projects such as the Expanded Public Works Programmes; Community Works Projects and the Municipality Infrastructure Grants. Lastly, Free Health Care Services and Social Welfare Service or Social Grants are strategies that are available in the village to alleviate poverty. The findings also revealed that there is high rate of unemployment in the village. In conclusion, the participants were very happy about the Municipality Infrastructure Grant because it has opened many opportunities for the inhabitants to be employed and it improved the road infrastructure. The recommendation drawn from the study, were that government should create more sustainable jobs for the disadvantaged. Government should also create jobs for the unemployed young graduates. The study recommends that these programmes to alleviate poverty should be extended to other villages across South Afric
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- Authors: Thengela, Ntombizanele
- Date: 20xx
- Subjects: Poverty Alleviation
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10353/18291 , vital:42249
- Description: There are between forty-five to fifty-seven percent (45-57%), South Africans who are engulfed in poverty. In an attempt to identify policy instruments that could help change the status quo, the South African government introduced various strategies to alleviate poverty and some have been seen to be relatively successful. The aim of the study was to identify poverty alleviation strategies in Gqhumahashe village and their impact on the livelihoods of the inhabitants. A qualitative approach and a phenomenological research design were used in conducting this study as these approaches allowed participants to share first-hand experiences regarding the issue under investigation. Purposive sampling method was employed to select participants for the study. Twenty-five participants were selected to participate in this study to share their experience as beneficiaries of these poverty alleviation programmes. The data obtained through in-depth interviews were analysed thematically as well as discussed and supported by the relevant literature. Thematic analysis was used to analyse audiotaped interviews. The findings revealed that there are poverty alleviation strategies in place in Gqhumahashe village. Those strategies include free basic and higher education, school feeding schemes, early childhood development and Kari-Gude literacy programmes for elderly. There are also projects such as the Expanded Public Works Programmes; Community Works Projects and the Municipality Infrastructure Grants. Lastly, Free Health Care Services and Social Welfare Service or Social Grants are strategies that are available in the village to alleviate poverty. The findings also revealed that there is high rate of unemployment in the village. In conclusion, the participants were very happy about the Municipality Infrastructure Grant because it has opened many opportunities for the inhabitants to be employed and it improved the road infrastructure. The recommendation drawn from the study, were that government should create more sustainable jobs for the disadvantaged. Government should also create jobs for the unemployed young graduates. The study recommends that these programmes to alleviate poverty should be extended to other villages across South Afric
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The Factors Influencing the Behavioural Intention of Overweight Adults to Use Wearable Devices for Sustained Health Monitoring
- Authors: Ogundele , Oluwaseyi Caleb
- Date: 20xx
- Subjects: Digital media
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: http://hdl.handle.net/10353/13903 , vital:39725
- Description: The volume of wearable devices that can be used for sustained health monitoring purposes is continuously growing within the healthcare sector. These devices allow users to track their own activity levels in real time. However, there are factors that may inhibit the behavioural intention to sustain the use of wearable devices for health monitoring in the long term by overweight adults. These factors include privacy concerns, costs of obtaining wearable devices, theft, frequent charging and short battery life of wearable devices and bulkiness of some wearable devices. It is against this backdrop that this study examined the factors influencing the behavioural intention of overweight adults in South Africa to make use of wearable devices for sustained health monitoring. This research made use of the Expectation Confirmation Model (ECM) as the theoretical foundation of the study. In achieving the aim of this study, a qualitative research approach was used. The purposive sampling technique was selected to identify twenty (20) overweight adults (aged 18-59 years) who are using wearable devices in East London, South Africa. Interviews were conducted with the twenty participants to identify the factors that will influence their behavioural intention to make use of wearable devices to monitor their health. Through thematic analysis, data provided by participants was grouped and summarised into relevant themes to answer the main research question. The study developed a framework that identifies the factors influencing behavioural intention of overweight adults to continue using wearable devices for sustained health monitoring. The factors that were identified include confirmation, perceived usefulness and satisfaction of wearable devices for sustained health monitoring. The realisation of weight loss, monitoring of daily activities and calories through the use of wearable devices was found to positively influence the behavioural intention of the users of wearable devices to continue their usage. However, the major factors that may inhibit the continuous usage of wearable devices for sustained health monitoring are privacy concerns, costs of obtaining wearable devices, theft, frequent charging and short battery life of wearable devices and bulkiness of some wearable devices. Based on the findings, the study recommended the following: (1) the wearable device manufacturers should assure the users of their privacy and confidentiality by providing the needed ii | P a g e interfaces for this purpose; (2) the manufacturers of wearable devices should make the devices less bulky so that they can be more portable; (3) South African government should provide security operatives in isolated areas where people are not feeling secure; (4) the manufacturers of wearable devices make the purchase prices of wearable devices more affordable, especially for low income people; and (5) the manufacturers of wearable devices should improve on battery life and quality of wearable devices so that the devices are more time efficient and require less charging of the devices.
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- Authors: Ogundele , Oluwaseyi Caleb
- Date: 20xx
- Subjects: Digital media
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: http://hdl.handle.net/10353/13903 , vital:39725
- Description: The volume of wearable devices that can be used for sustained health monitoring purposes is continuously growing within the healthcare sector. These devices allow users to track their own activity levels in real time. However, there are factors that may inhibit the behavioural intention to sustain the use of wearable devices for health monitoring in the long term by overweight adults. These factors include privacy concerns, costs of obtaining wearable devices, theft, frequent charging and short battery life of wearable devices and bulkiness of some wearable devices. It is against this backdrop that this study examined the factors influencing the behavioural intention of overweight adults in South Africa to make use of wearable devices for sustained health monitoring. This research made use of the Expectation Confirmation Model (ECM) as the theoretical foundation of the study. In achieving the aim of this study, a qualitative research approach was used. The purposive sampling technique was selected to identify twenty (20) overweight adults (aged 18-59 years) who are using wearable devices in East London, South Africa. Interviews were conducted with the twenty participants to identify the factors that will influence their behavioural intention to make use of wearable devices to monitor their health. Through thematic analysis, data provided by participants was grouped and summarised into relevant themes to answer the main research question. The study developed a framework that identifies the factors influencing behavioural intention of overweight adults to continue using wearable devices for sustained health monitoring. The factors that were identified include confirmation, perceived usefulness and satisfaction of wearable devices for sustained health monitoring. The realisation of weight loss, monitoring of daily activities and calories through the use of wearable devices was found to positively influence the behavioural intention of the users of wearable devices to continue their usage. However, the major factors that may inhibit the continuous usage of wearable devices for sustained health monitoring are privacy concerns, costs of obtaining wearable devices, theft, frequent charging and short battery life of wearable devices and bulkiness of some wearable devices. Based on the findings, the study recommended the following: (1) the wearable device manufacturers should assure the users of their privacy and confidentiality by providing the needed ii | P a g e interfaces for this purpose; (2) the manufacturers of wearable devices should make the devices less bulky so that they can be more portable; (3) South African government should provide security operatives in isolated areas where people are not feeling secure; (4) the manufacturers of wearable devices make the purchase prices of wearable devices more affordable, especially for low income people; and (5) the manufacturers of wearable devices should improve on battery life and quality of wearable devices so that the devices are more time efficient and require less charging of the devices.
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The impact of exchange rate volatility on manufacturing production : a case study of South Africa
- Authors: Dube, Ziphozethu
- Date: 20
- Subjects: Foreign exchange rates -- South Africa Manufacturing industries -- South Africa Industrial productivity
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/8294 , vital:32193
- Description: The study examined the impact of exchange rate volatility on manufacturing production for the period of 1994 - 2015 in South Africa. The study evaluated the literature on exchange rate volatility and manufacturing production which was conducted and resulted into specification of an empirical model. The Autoregressive Distributive Lag (ARDL) was employed towards deducing the relationship of exchange rate volatility and manufacturing production. This study made use of monthly data to examine the relationship of exchange rate volatility and manufacturing production. However, the data frequency selected, ensured an adequate number of observations and results revealed that exchange rate volatility has a negative relationship with manufacturing production in the long run, nonetheless considering South Africa as an export economy the results were consistent with Ayinde (2014) who found that this relationship is seen to exist. A positive relationship was noted within the short run period. The unstable business environment in South Africa has been worsened by the political climate and unstable policies that has a ripple effect. Due to this aspect the study recommended the need for stabilizer policies for monetary, fiscal, trade and exchange rate management. The government should properly manage the exchange rate and design suitable policies that will reduce the deviation of the exchange rate thereby encourage production. Exchange rate stability is viewed to be key for export-oriented manufacturing sectors in a macroeconomic environment. The South African economy has felt such heaviness of political unrest and polices that do not result in stability. It would be key for policymakers to be vigilant and implement such measures to get the economy ticking in the right direction.
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- Authors: Dube, Ziphozethu
- Date: 20
- Subjects: Foreign exchange rates -- South Africa Manufacturing industries -- South Africa Industrial productivity
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/8294 , vital:32193
- Description: The study examined the impact of exchange rate volatility on manufacturing production for the period of 1994 - 2015 in South Africa. The study evaluated the literature on exchange rate volatility and manufacturing production which was conducted and resulted into specification of an empirical model. The Autoregressive Distributive Lag (ARDL) was employed towards deducing the relationship of exchange rate volatility and manufacturing production. This study made use of monthly data to examine the relationship of exchange rate volatility and manufacturing production. However, the data frequency selected, ensured an adequate number of observations and results revealed that exchange rate volatility has a negative relationship with manufacturing production in the long run, nonetheless considering South Africa as an export economy the results were consistent with Ayinde (2014) who found that this relationship is seen to exist. A positive relationship was noted within the short run period. The unstable business environment in South Africa has been worsened by the political climate and unstable policies that has a ripple effect. Due to this aspect the study recommended the need for stabilizer policies for monetary, fiscal, trade and exchange rate management. The government should properly manage the exchange rate and design suitable policies that will reduce the deviation of the exchange rate thereby encourage production. Exchange rate stability is viewed to be key for export-oriented manufacturing sectors in a macroeconomic environment. The South African economy has felt such heaviness of political unrest and polices that do not result in stability. It would be key for policymakers to be vigilant and implement such measures to get the economy ticking in the right direction.
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