Postgraduate Research

Overview

A special thanks to Dr Yunus Abdul Gaffar, The initial author of this initial guide.

For more resources pertaining to research in the EE Department at UCT, see Category:Research.

What is research

Research is a logical and systematic search for new and useful information on a particular topic. It is an investigation of finding solutions to problems through objective and systematic analysis.

What is design

Design is the process used to create something to solve a problem. Design involves the transformation of an initial user requirement to produce documentation instructions on how to realise the end product. In determining a solution, barriers must be overcome. A design assignment, there, is an engineering problem and involves sub-problems that must be addressed.

The design process typically consists of the following steps:

1. User requirements: client describes the problem and constraints (time, budget, using specific components) that the solution must fit within. Engage with client to understand who is going to use the product, where is it going to be used and how often, and for how long (lifespan) is it going to be used. Separate the core requirements from the ‘nice to have’ ones
2. Technical requirements: translate the user requirements into concise technical requirements that contain technical jargon.
3. Identify multiple solutions: synthesises a range of potential solutions to the problem or a range of approaches to developing a solution that is consistent with assumptions, premises, limitations and constraints
4. Evaluates the potential approaches against criteria. Examples of criteria include cost, efficiency, performance, reliability
5. Chooses a preferred approach and presents reasonable arguments to justify this decision
6. Develops the full design of the selected option. This can include developing a functional-flow block diagram for the proposed solution, and a block diagram showing the major sub-systems + interfaces between sub-systems: for each subsystem, identify multiple solutions and justify your choice based on the requirements and constraints of the system
7. Test each sub-system to ensure that it is functioning accurately as expected
8. Perform integration and testing: Build prototype and perform testing. Assess if system technical requirement are met
9. Develop improved prototype by iterating through steps 6 -> 7 -> 8 . The more iterations are done, the better the quality of the developed system.
10. Produces design documentation for implementation. A design document provides detailed information or the ‘blueprint’ to implement the proposed solution.

Postgraduate studies

Note: keeping a research journal throughout your postgraduate studies can be useful to document ideas, problems, notes and reminders. During measurement trials, this is especially useful and will help a lot in the write up phase. A journal can be a hardcover book, or a word document, a blog or a combination of these.

Masters Degree

A Masters degree is training to equip candidates with skills necessary for further independent research. The dissertation should demonstrate that a candidate has the ability to be adequately acquainted with the relevant literature, has mastered appropriate techniques and analytic methods, assess the significance of findings in a thorough and logically-coherent manner, shows evidence of critical and independent thought and the write-up of the dissertation is satisfactory in presentation and literature style. The dissertation does not need to involve original research or distinctly advance knowledge of the subject.

PhD Degree

A PhD degree shows that a candidate can work independently and make an original, significant and meaningful contribution that adds to the existing body of knowledge. Student must demonstrate that he/she is working at the cutting edge and at the academic forefront in the topic. Evidence of a ‘significant contribution’ includes publishing in accredited journals and writing a good quality, polished PhD thesis. The ideas relating to the original contribution of the PhD work should come directly from the PhD candidate and not from the supervisor. This shows that the PhD candidate can think creatively, which is one of the skills that it certified when a PhD degree is granted. Examples of an original contribution can include:

• Providing a new angle on a previously researched problem
• Providing a single new observation
• Bringing new evidence to an old issue or taking a particular technique and applying it to a new area
• Carrying out empirical work that has not been done before or making synthesis that has not been made before
• How to demonstrate Significant Contribution & Original Study in your PhD Thesis

Critical and creative thinking are two important outcomes of a PhD degree. Research what these are and how to further develop your critical and creative thinking skills.

A PhD degree is typically examined in the context of the scientific process, which is made up of the following steps

1. Research questions are stated
2. Background research is done
3. A clear, concise and achievable hypothesis is carefully phrased
4. The hypothesis is tested by doing an experiment
5. The data obtained from experiments is analysed and conclusions are drawn

Choosing a field of study and a research topic

There is a difference between a field of study and a broad research topic. Examples of a field are “passive radar”, ‘radar imaging’, ‘cognitive radar’. Examples of a research topic is “Optimum placement of receivers for FM-based passive radar for detection and tracking of aircraft” or “Radar imaging of small boats in high sea states”.

A field of study is more general and does not focus on a problem. A research topic is more focused and does focus on a problem. When looking for a field to work in, look at ‘hot-topics’, ie topics that there are recent publications in journals and conferences and researchers are actively trying to advance the field by contributing knowledge

When choosing a broad research topic, ensure:

• You are interested in the topic and developing/applying the skills required to complete the research. You are going to spend many months on this single topic and being passionate about is a key ingredient.
• Topic is not ‘saturated’, ie not have so many publications that there is little room left to make an original contribution.
• Enough literature that a critical literature survey can be written to show understanding of the published literature and the recent findings
• You have the time/budget/skills to develop a radar to get measured data or have access to equipment/radar to get measured data to sufficiently address your research objectives. Or, use existing good quality measured datasets. For new fields of study, measured data might not be critical. Theory and simulations may be enough.
• A simulator can be developed to obtained simulated data to compare against measured data and to generate simulated data for scenarios that is difficult/time-consuming to measure
• ‘Nice to have’: recent books on the field/topic, IEEE journal or magazine review on the field/topic, accept to experts (supervisor, industry partner, international expert), dissertations/thesis on the topic, existing datasets for initial analysis to get an understanding/appreciation for the complexity of the problem

The next step is to fine-tune the broad research topic to a more focus topic, then to phrase research objectives or research questions.

It is challenging to refine a broad research topic or to identify a ‘good research problem’. There are many problems out there: some are solvable and others are not, some are important and some are not. A ‘good research problem’ is one that is both solvable and important. The process of finding a ‘good research problem’ involves:

• reading the literature to understand what has been done and the boundaries of existing knowledge. However, if you spent too much time reading the literature and believing everything, you’ll never notice the flaws. While experts that publish are knowledgeable in their area, they rarely admit what they don’t know. Furthermore, experts have biases and work within hidden constraints. If you don’t read the literature enough, you may have doubts of what can be achieved. Reading the literature requires a balance. Hamming suggests reading the literature until the problem becomes reasonably clear. Then stop reading the literature and think through the problem yourself and brainstorm solutions. Think about how you would slightly change the problem to be the ‘solvable’. In conclusion, reading to find solutions does not lead to great research.

PhD students: the PhD candidate leads the process to identifying and refining the topic. This is because the journey of "finding the problem" and "clarifying the problem" is part of the PhD work. It is a skill that every PhD candidate needs to learn. If your supervisor gives you a clear topic + hypothesis + research objectives, and clearly outlines your methodology, what data should be used and what outcomes to expect, then this is more master’s research than independent PhD research.