A Critical Evaluation of Validation Practices in the Forensic Acquisition of Digital Evidence in South Africa
- Jordaan, Jason, Bradshaw, Karen L
- Authors: Jordaan, Jason , Bradshaw, Karen L
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/440174 , vital:73754 , ISBN 9783030660390 , https://doi.org/10.1007/978-3-030-66039-0_9
- Description: Accepted digital forensics practice requires the tools used in the forensic acquisition of digital evidence to be validated, meaning that the tools perform as intended. In terms of Sect. 15 of the Electronic Communications and Transactions Act 25 of 2002 in South Africa, validation would contribute to the reliability of the digital evidence. A sample of digital forensic practitioners from South Africa was studied to determine to what extent they make use of validated forensic tools during the acquisition process, and how these tools are proven to be validated. The research identified significant concerns, with no validation done, or no proof of validation done, bringing into question the reliability of the digital evidence in court. It is concerning that the justice system itself is not picking this up, meaning that potentially unreliable digital evidence is used in court.
- Full Text:
- Date Issued: 2020
- Authors: Jordaan, Jason , Bradshaw, Karen L
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/440174 , vital:73754 , ISBN 9783030660390 , https://doi.org/10.1007/978-3-030-66039-0_9
- Description: Accepted digital forensics practice requires the tools used in the forensic acquisition of digital evidence to be validated, meaning that the tools perform as intended. In terms of Sect. 15 of the Electronic Communications and Transactions Act 25 of 2002 in South Africa, validation would contribute to the reliability of the digital evidence. A sample of digital forensic practitioners from South Africa was studied to determine to what extent they make use of validated forensic tools during the acquisition process, and how these tools are proven to be validated. The research identified significant concerns, with no validation done, or no proof of validation done, bringing into question the reliability of the digital evidence in court. It is concerning that the justice system itself is not picking this up, meaning that potentially unreliable digital evidence is used in court.
- Full Text:
- Date Issued: 2020
Detecting plant species in the field with deep learning and drone technology:
- James, Katherine M F, Bradshaw, Karen L
- Authors: James, Katherine M F , Bradshaw, Karen L
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160445 , vital:40446 , https://0-doi.org.wam.seals.ac.za/10.1111/2041-210X.13473
- Description: Aerial drones are providing a new source of high‐resolution imagery for mapping of plant species of interest, amongst other applications. On‐board detection algorithms could open the door to allow for applications in which drones can intelligently interact with their environment. However, the majority of plant detection studies have focused on detection in post‐flight processed orthomosaics. Greater research into developing detection algorithms robust to real‐world variations in environmental conditions is necessary, such that they are suitable for deployment in the field under variable conditions. We outline the steps necessary to develop such a system, show by example how real‐world considerations can be addressed during model training and briefly illustrate the performance of our best performing model in the field when integrated with an aerial drone.
- Full Text:
- Date Issued: 2020
- Authors: James, Katherine M F , Bradshaw, Karen L
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160445 , vital:40446 , https://0-doi.org.wam.seals.ac.za/10.1111/2041-210X.13473
- Description: Aerial drones are providing a new source of high‐resolution imagery for mapping of plant species of interest, amongst other applications. On‐board detection algorithms could open the door to allow for applications in which drones can intelligently interact with their environment. However, the majority of plant detection studies have focused on detection in post‐flight processed orthomosaics. Greater research into developing detection algorithms robust to real‐world variations in environmental conditions is necessary, such that they are suitable for deployment in the field under variable conditions. We outline the steps necessary to develop such a system, show by example how real‐world considerations can be addressed during model training and briefly illustrate the performance of our best performing model in the field when integrated with an aerial drone.
- Full Text:
- Date Issued: 2020
Detecting Similarity in Multi-procedure Student Programs Using only Static Code Structure
- Bradshaw, Karen L, Chindeka, Vongai
- Authors: Bradshaw, Karen L , Chindeka, Vongai
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/440260 , vital:73761 , ISBN 9783030356286 , https://doi.org/10.1007/978-3-030-35629-3_14
- Description: Plagiarism is prevalent in most undergraduate programming courses, including those where more advanced programming is taught. Typical strategies used to avoid detection include changing variable names and adding empty spaces or comments to the code. Although these changes affect the visual components of the source code, the underlying structure of the code remains the same. This similarity in structure can indicate the presence of plagiarism. A system has been developed to detect the similarity in the structure of student programs. The detection system works in two phases: The first phase parses the source code and creates a syntax tree, representing the syntactical structure of each of the programs, while the second takes as inputs two program syntax trees and applies various comparison algorithms to detect their similarity. The outcome of the comparison allows the system to report a result from one of four similarity categories: identical structure, isomorphic structure, containing many structural similarities, and containing few structural similarities. Empirical tests on small sample programs show that the prototype implementation is effective in detecting plagiarism in source code, although in some cases manual checking is needed to confirm the presence of plagiarism.
- Full Text:
- Date Issued: 2020
- Authors: Bradshaw, Karen L , Chindeka, Vongai
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/440260 , vital:73761 , ISBN 9783030356286 , https://doi.org/10.1007/978-3-030-35629-3_14
- Description: Plagiarism is prevalent in most undergraduate programming courses, including those where more advanced programming is taught. Typical strategies used to avoid detection include changing variable names and adding empty spaces or comments to the code. Although these changes affect the visual components of the source code, the underlying structure of the code remains the same. This similarity in structure can indicate the presence of plagiarism. A system has been developed to detect the similarity in the structure of student programs. The detection system works in two phases: The first phase parses the source code and creates a syntax tree, representing the syntactical structure of each of the programs, while the second takes as inputs two program syntax trees and applies various comparison algorithms to detect their similarity. The outcome of the comparison allows the system to report a result from one of four similarity categories: identical structure, isomorphic structure, containing many structural similarities, and containing few structural similarities. Empirical tests on small sample programs show that the prototype implementation is effective in detecting plagiarism in source code, although in some cases manual checking is needed to confirm the presence of plagiarism.
- Full Text:
- Date Issued: 2020
Environmental health promotion at a National Science Festival: An experiential-education based approach
- Duxbury, Theodore O, Bradshaw, Karen L, Khamanga, Sandile, Tandlich, Roman, Srinivas, Sunitha C
- Authors: Duxbury, Theodore O , Bradshaw, Karen L , Khamanga, Sandile , Tandlich, Roman , Srinivas, Sunitha C
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/440274 , vital:73762 , xlink:href="https://doi.org/10.1080/1533015X.2019.1567406"
- Description: To increase individual and communal environmental health awareness through an experiential-education project. A computer-based pre- and postintervention quiz; an educational poster; an interactive board game; and a take-home information leaflet were utilized for a school learners-centered health promotion exhibit at a National Science Festival in Grahamstown, South Africa. Out of all the participants, 55.7% were female, and 76.5% attended or had attended a government school. Participants showed significant improvement in their pre- and post educational intervention. The exhibit was effective in educating participants on environmental health, natural resources, and the impact environmental pollution has on their quality of life.
- Full Text:
- Date Issued: 2020
- Authors: Duxbury, Theodore O , Bradshaw, Karen L , Khamanga, Sandile , Tandlich, Roman , Srinivas, Sunitha C
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/440274 , vital:73762 , xlink:href="https://doi.org/10.1080/1533015X.2019.1567406"
- Description: To increase individual and communal environmental health awareness through an experiential-education project. A computer-based pre- and postintervention quiz; an educational poster; an interactive board game; and a take-home information leaflet were utilized for a school learners-centered health promotion exhibit at a National Science Festival in Grahamstown, South Africa. Out of all the participants, 55.7% were female, and 76.5% attended or had attended a government school. Participants showed significant improvement in their pre- and post educational intervention. The exhibit was effective in educating participants on environmental health, natural resources, and the impact environmental pollution has on their quality of life.
- Full Text:
- Date Issued: 2020
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