A simulation of film cooling in the leading edge region of a turbine blade (trench effect on film effectiveness from cylinder in crossflow)

Film cooling is one of the cooling system techniques applied to the turbine blade. Gas turbine use film cooling technique to protect turbine blade from expose directly to a hot gas to avoid the blade from defect. The focus of this investigation is to investigate the effect of embedded three difference depth of trench at cooling holes geometry to the film cooling effectiveness. Comparisons are made under blowing ratio 1.0, 1.25, 1.5 and 2.0. Three configuration leading edge with depth Case A (0.0125D), Case B (0.0350D) and Case C (0.713D) were compared to leading edge without trench. Result shows that as blowing ratio increased from 1.0 to 1.25, the film cooling effectiveness is increase for leading edge without trench and also for all cases. However when the blowing ratio is increase to 1.5, film cooling effectiveness is decrease for all cases. Meanwhile for blowing ratio 2.0, the result shows the effect of depth is too small for all the cases. Overall the Case B with blowing ratio 1.25 has the best film cooling effectiveness with significant improvement compared to leading edge without trench and with trench Case A and Case C

Challenges And Expectation For Implementation Of Technical And Vocational Education Training (TVET) In Malaysian Prison Institutions: A Preliminary Study

The Malaysian Prison Department offers rehabilitation programmes for inmates that include guidance and counselling, disciplinary, religious and moral education, vocational and skills training and pre-release programs before they return to society as law-abiding citizens, and the success of this program is based on the recidivism rate. Implementation of Technical dan Vocational Education Training (TVET) in the Human Development Program (PPI) depends on the professional development of the instructor and must be in line with the national level requirement. Prison vocational instructors need to possess different teaching competencies due to their unique environment. This study aimed to identify and provide a new approach for training vocational teachers according to the needs of different stakeholders such as instructors, trainers (inmates) and related parties involved in TVET training. This study used a qualitative approach to collect the data. It used a semi-structured interview strategy with the educational experts in TVET, including training module developers, teaching experts, national industrial experts, prison senior officers, NDTS coaches, NDTS trainers and NDTS coordinators. The interview was to develop in-depth knowledge to enhance the data on the important domains of teaching competencies by thematic analysis. Analysis using NVivo, this study identified five core teaching competencies challenges faced by vocational instructors in prison: planning and preparation competencies, classroom preparation competencies, carrying out professional responsibilities’ competencies; instruction competencies; and assessment competencies. This study can be useful to Prison Vocational Instructors, Prison Management and also Prison Institutions that pursue accreditation on TVET teaching and learning. Keywords: Teaching Competency; Education; Prison; TVE

Elements of Digital Technology Needs Among Technical and Vocational Education Students

This study was conducted to identify digital technology needs among final year students of Technical and Vocational Education (TVE) at the School of Education, Universiti Teknologi Malaysia (UTM)-. The elements selected for this study are the students' technical skills, attitudes and the availability of facilities. A questionnaire was used as a research instrument in this quantitative study. A total of 89 respondents were selected at random. The collected data was analyzed using the Statistical Package Social Sciences (SPSS) software version 26.0 to obtain frequency values, percentages (%), means, and standard deviations. According to the findings of the study, the need for digital technology among final-year TVE students is satisfactory, with the mean value for the entire research question obtained being 3.50 at a moderate score level. Therefore, the School of Education at UTM needs to increase the need for the use of digital technology to facilitate students in the teaching and learning process

Factors Contributing to Students’ Attainment in Design and Technology Project Work

Design and Technology (Reka Bentuk dan Teknologi) or known as RBT, is a new subject introduced as part of the Secondary School Standard Curriculum (KSSM) in 2017. The content of this new subject focuses on the daily application of technology, specifically through the implementation of RBT project work. There is a need to assess whether this subject has a positive impact on students’ achievement, especially in project work. This study aimed to examine the factors influencing the performance of lower secondary school students in Johor Bahru district in their RBT project work. A total of 374 form three students were selected as a sample using descriptive approach and utilising quantitative research design. A questionnaire was used as the research instrument. A pilot study was conducted, and the result was analysed using the Rasch Measurement Model to determine the validity and reliability of the instruments used. Furthermore, the study’s data were analysed using the SPSS 25.0 software. The study found that students’ interest (m), attitude (s), knowledge (p), and skills (k) in RBT is at a moderate level with the mean value for each variable for (m) = 2.61, (s) = 2.79, (p) = 2.75, and (k) = 2.73. The Pearson coefficient found a significant relationship between interest, attitude, knowledge skills, and students' academic achievement, where r = 0.543 (p <0.05) for interest, r = 0.568 (p <0.05) for attitude, r = 0.526 (p <0.05) for knowledge, and r = 0.515 (p <0.05) for skills. The results of this study prove the need for a more interactive and effective teaching approach to increase students’ interests, attitudes, knowledge, and skills to improve their performance in RBT project work

Learning algebra using augmented reality: A preliminary investigation on the application of photomath for lower secondary education

This study aims to determine the effect of Photomath mobile application on the achievement and attitude of learning algebraic equations for lower secondary school students in Malaysia. Photomath is a free mobile application, for both ios and android platforms, which uses computer vision and image understanding technology to scan math equations using the mobile camera to subsequently provide worked solutions. The application recognises equations of both printed and handwritten and provides step-by-step calculations and graphical solutions. In this study, data were collected from 33 lower secondary students through pre and post-test and questionnaire. Data from pre-test and post-test were used to investigate the performance of students after the application of Photomath, whereas the questionnaire was used to identify the attitude of students towards the application of Photomath in learning algebraic equations, regarding belief and readiness aspects. Different mean scores for pre-test and post-test were tested, and hypothesis testing using a t-test was used. Data from the questionnaire were analysed using descriptive statistics. This study has found that the application of Photomath significantly enhances the learning of algebraic equations among Form Two students. However, the participants' belief and readiness towards Photomath are still at a moderate level

Augmented Reality Applications in Teaching and Learning for topic of Current and Voltage Division for Technical and Vocational Education

The combination of technology Augmented Reality (AR) with educational content aims to create new ideas that can improve the effectiveness and attractiveness of teaching and learning for students in real-life scenarios. The use of AR technology can make the process of teaching and learning more enjoyable, in which students' interest in learning can be stimulated. The AR technology has three characteristics. The first feature is that AR technology is a combination of virtual objects with the real world. The second feature is that AR operates in real time and interactively. The last feature is that it has 3 dimensions (3D) for virtual objects. In this study, the ADDIE model includes five phases, namely Analysis, Design, Development, Implementation and Evaluation, which are utilised to develop applications based on AR technology in education for the topic of Current and Voltage Division. To identify the effectiveness of the application of AR technology, a survey using questionnaire was conducted among pre-service teachers to know their perceptions of the development of AR applications namely as Voltrent AR. As this is a quantitative study where questionnaires were distributed to 73 students from the class of Bachelor of Technology with Education (Electric and Electronics) with Honours and Bachelor of Technology with Education (Living Skills) with Honours at Universiti Teknologi Malaysia (UTM) Skudai, Johor. Most respondents gave very positive feedback on the use of AR in education, especially for the topic of Current and Voltage Division. AR is viewed as a medium of instruction that is innovative, interesting and effective. Voltrent AR application development is successfully developed based on the ADDIE model, and the application development of the constructivism theory was applied in this AR application. Thus, the AR application development has reached the desired objective of producing application-based Augmented Reality as a teaching aid.&nbsp

Factors contributing to students’ attainment in design and technology project work

Design and Technology (Reka Bentuk dan Teknologi) or known as RBT, is a new subject introduced as part of the Secondary School Standard Curriculum (KSSM) in 2017. The content of this new subject focuses on the daily application of technology, specifically through the implementation of RBT project work. There is a need to assess whether this subject has a positive impact on students’ achievement, especially in project work. This study aimed to examine the factors influencing the performance of lower secondary school students in Johor Bahru district in their RBT project work. A total of 374 form three students were selected as a sample using descriptive approach and utilising quantitative research design. A questionnaire was used as the research instrument. A pilot study was conducted, and the result was analysed using the Rasch Measurement Model to determine the validity and reliability of the instruments used. Furthermore, the study’s data were analysed using the SPSS 25.0 software. The study found that students’ interest (m), attitude (s), knowledge (p), and skills (k) in RBT is at a moderate level with the mean value for each variable for (m) = 2.61, (s) = 2.79, (p) = 2.75, and (k) = 2.73. The Pearson coefficient found a significant relationship between interest, attitude, knowledge skills, and students' academic achievement, where r = 0.543 (p <0.05) for interest, r = 0.568 (p <0.05) for attitude, r = 0.526 (p <0.05) for knowledge, and r = 0.515 (p <0.05) for skills. The results of this study prove the need for a more interactive and effective teaching approach to increase students’ interests, attitudes, knowledge, and skills to improve their performance in RBT project work

The blockage ratio effect to the spray performances

Nozzle sprays are used in wide range of application. The used of nozzle application is depend on the spray characteristics, by which to suit the particular application. This project studies the effect of the air blockage ratio to the spray characteristics. This research conducted into two part which are experimental and simulation section. The experimental was conducted by using particle image velocimetry (PIV) method, and ANSYS software was used as tools for simulation section. There are two nozzles were tested at 1 bar pressure of water and air. Nozzle A (with blockage ratio 0.316) and nozzle B (blockage ratio 1.000). Both of the sprays performances generated by the nozzles was examined at 9 cm vertical line from 8 cm of the nozzle orifice. The validation result provided in the detailed analysis shows that the trend of graph velocity versus distance gives the good agreement within simulation and experiment. From result, nozzle A generated a wider spray angle and higher water droplet velocity which are 31.41 degree and 37.317 m/s compared to nozzle B which has produced 27.13 degree of spray penetration angle and 16.49 m/s water droplet velocity. As a conclusion, blockage ratio has affected the spray system by increasing the velocity of air inside the spray system. This is happened at a condition of 1 bar air pressure

Impacts of conceive-design-implement-operate knowledge and skills for innovative capstone project

Nowadays, the competitions among countries to recruit engineering students as workers do not focus on talents, but also on the reserve of it. The advancement of education in engineering field plays a big part in enhancing comprehensive domestic strength because the scientific revolution will contribute to important modifications of the industrial landscape. Therefore, Conceive- Design-Implement-Operate (CDIO) understanding and techniques are required for enhancing this field of education particularly for innovation of capstone project. Thus, this study was identified student knowledge and skills consist of teamwork, problem-solving, and communication skills of the CDIO in capstone project involved two faculties which are Faculty of Biosciences & Medical Engineering (FBME) and Faculty of Electrical Engineering (FKE) at Universiti Teknologi Malaysia (UTM). Our respondents consist of 28 and 30 of third-year students from FBME and FKE respectively. Besides, this study also was identified the importance of the CDIO approach in the innovative capstone project. The method that used was a quantitative survey by using 5 Likert scale questionnaires. The average mean for all research questions indicated that the majority of respondents agreed that the CDIO knowledge and skills in the capstone project are important in engineering education. Hence, the engineering students must possess not only the skills such as teamwork, problem-solving, and communication but also needs more knowledge that helps them to employability and adapt to real-world engineering problems

The blockage ratio effect to the spray performances

Nozzle sprays are used in wide range of application. The used of nozzle application is depend on the spray characteristics, by which to suit the particular application. This project studies the effect of the air blockage ratio to the spray characteristics. This research conducted into two part which are experimental and simulation section. The experimental was conducted by using particle image velocimetry (PIV) method, and ANSYS software was used as tools for simulation section. There are two nozzles were tested at 1 bar pressure of water and air. Nozzle A (with blockage ratio 0.316) and nozzle B (blockage ratio 1.000). Both of the sprays performances generated by the nozzles was examined at 9 cm vertical line from 8 cm of the nozzle orifice. The validation result provided in the detailed analysis shows that the trend of graph velocity versus distance gives the good agreement within simulation and experiment. From result, nozzle A generated a wider spray angle and higher water droplet velocity which are 31.41 degree and 37.317 m/s compared to nozzle B which has produced 27.13 degree of spray penetration angle and 16.49 m/s water droplet velocity. As a conclusion, blockage ratio has affected the spray system by increasing the velocity of air inside the spray system. This is happened at a condition of 1 bar air pressure