Research Methodology and Statistic Chapter03: Determinate ...
Transcript of Research Methodology and Statistic Chapter03: Determinate ...
Research Methodology and StatisticChapter03: Determinate research
problemDr. Supakit Nootyaskool
Objective
• To know how to consider a research problem• To inspect objective of research• To define variable in research problem• To investigate hypothesis of research
Topics
3.1 Consideration in selecting a research problem3.2 The formulation objective3.3 Relating variable in research problem3.4 Writing hypothesis of research
3.1 Consideration in selecting a research problem
Your interesting?3.1.1 In the domain of interesting , what is the reviewed literature focus?
‐ Deep search in the problem‐ Explore the related thesis
3.1.2 Discussion topic with your adviser 3.1.3 Search group in research gate or forums
Check your topic
• You must ensure that selected topic can do a research.• Logical idea?• Setup a small experiment to recheck
3.2 The formulation objective
An research usually has two objective 1) General objective2) Specific objective
Specific objective
Specific objectiveSpecific
objective
General objective
Specific objective
Activity: Writing an objective of research from interest topics
• Discussion (10 Minutes)– General objective– Specific objective
• Example
Words in objective writing
เพื่อค้นหาความจริง
to find out
เพื่อวดัผล
to measure
เพื่อชีใ้ห้เห็น
to point out
เพื่อสาํรวจ
to explore
เพื่อตรวจให้แน่ใจ
to verify
เพื่อกําหนด
to determine
to compareเพื่อเปรียบเทียบ
To establish
เพื่อสร้าง(พิสจูน์)
To assessเพื่อประเมิน(คา่)
to analysis
เพื่อวิเคราะห์
3.3.1 Relating variable in research problem of computer science
• Comparison performance of algorithm – Time (Run speed)– Resource (memory)– Effective of coding (Easily implement)
• System – Explain how to solve the problem
• Algorithm/ pseudo‐code• Diagram
Science/IT research• Neural network
– H = Size of hidden layer– N = Number of node
NN
H = 10N = 20H = 10N = 20
DataSize 100
Recog.90%
NN+
H = N = 30H = 5N = 30
DataSize 100
Recog.90%Old NN New NN+
Science/IT research• Extraneous variable
– System (computer) technology
• CPU• RAM• Network
– Compiler• C/C++ • VB
– Programming ability• Stack• Memory management
NN
H = 10N = 20H = 10N = 20
DataSize 100
Recog.90%
Independent Var.
Dependent Var.
How to set variable in this research
NN
H = 10N = 20H = 10N = 20
DataSize 100
Recog.90%
NN+
H = ??N = ??H = ??N = ??
DataSize 100
Recog.90%Old NN New NN+
NN / NN+
• Independent variable– Node size = 5, 10, 15, 20– Hidden layer = 5, 10, 15
• Dependent variable– Average running time (Speed)– Average recognition rate– Average memory size (If it is possible)
• Extraneous variable– Same system
• CPU I7 (Force running single thread)
3.3.2 Format of variable
• The research consists with two format variables:– Active variable: the researcher can manage or control the parameter value.
– Attribute variable: the research can not be manageable.
Science/IT research (Which is manageable/unmanageable?)
• Extraneous variable– System (computer) technology
• CPU• RAM• Network
– Compiler• C/C++ • VB
– Programming ability• Stack• Memory management
NN
H = 10N = 20H = 10N = 20
DataSize 100
Recog.90%
Independent Var.
Dependent Var.
3.3.3 Measurement scalingThe experiment, comparison and present value in research can be presented in five types
1. Nominal, classificatory scale2. Ordinal, ranking scale3. Interval scale4. Ratio scale5. Logarithm scale
3.4 Writing hypothesis of research
Hypothesis is a supposition explanation made on the basic limited evidence. (from American Dic.)
NN
H = 10N = 20H = 10N = 20
DataSize 100
Recog.90%
Hypothesis: When we increase number of data from 100 to 200 the computation time will increase in twice.
Does it suitable ?