47 research outputs found
Teacher satisfaction in online education: a two-factor model of extrinsic and intrinsic factors across diverse contexts
No full textBlended learning modes are becoming the norm in educational institutions. This research investigates the factors affecting teacher satisfaction with online lesson delivery. This study was undertaken in primary, secondary, and higher education institutions across ten countries worldwide. A total of 247 teachers responded to the survey. This work innovatively validates a two-factor model of teacher satisfaction with online teaching, grounded in Herzberg’s two-factor theory. A first-order confirmatory factor analysis (CFA) was used to validate the constructs, followed by a second-order exploratory factor analysis (EFA) to identify key drivers of teacher satisfaction. The results showed that there were two key hidden drivers of teacher satisfaction i.e., intrinsic factor and extrinsic factor. The two factors explained 75% of the variance in teacher satisfaction. Teachers reported higher satisfaction due to the flexibility and work-life balance that online teaching affords, while dissatisfaction stemmed from institutional policies and insufficient incentives. It was observed that STEM teachers and older educators had lower satisfaction and higher technology anxiety. These insights have potential applications beyond online teaching, extending to teacher satisfaction in physical classroom settings
Novel Machining Configuration of Carbon Fibre Reinforced Polymer (CFRP) Using Wire Electric Discharge Machining (WEDM)
No full textAdvanced aerospace materials like Carbon Fiber reinforced polymer (CFRP) contains heterogeneous and anisotropic material characteristics that does not exhibit sufficient toughness before failure. CFRP materials are recently replacing most of the modern applications like aerospace, space exploration and in various exotic engineering applications due to their outstanding strength to super lightweight properties. Manufacturing operations like cutting and machining the CFRP to the required shapes are most challenging aspects that are addressed in recent times. Aim of this research is to investigate the influence of CFRP orientation and layering pattern when machined using WEDM Machining process. As the material is extremely capable, and its heterogeneous structure makes them stand out from other conventional materials investigating its machinability using WEDM is vital. WEDM is extremely capable and could produce parts with intrinsic cuts and high precision. The various parameters involved with WEDM are carefully studied along with the novel metal-CFRP-metal sandwich configuration to machine and the CFRP samples are experimented with these parameters. The results obtained from the research are analyzed and the best suitable combinations of WEDM parameters are determined. To facilitate this, the cut samples are observed under a microscope to closely inspect the samples to discover which parameters had influenced the smoothness and quality of the cut the most.</p
Reverse Engineering – an Educational Tool for Sustainable development: Curriculum Enhancement Internship Project funded by the Teaching and Learning Academy
No full textEngineering as other subjects in Education needs to produce industry-oriented graduates. However, to graduate industry-ready engineers requires more active learning than passive knowledge.
To improve students’ experience, enhance their active learning and increase their engagement with the module being taught, project-base learning was introduced at foundation level, using reverse Engineering (RE) alongside with fundamental understanding sustainability as an induction to the sustainable development goals. Reverse Engineering is used in all industries, where companies would buy competitors’ products and disassemble them with the aim to study all components, the way they were made, the materials used and the manufacturing processes involved in their making. A detailed report is produced, then a plan is set up to improve each component and the product as whole, then, add differentiating values to companies’ own products.
To become sustainable, we should understand existing machines and search for ways to make them sustainable; e.g. converting diesel trains into hydrogen trains. It is clear that reverseengineering and reverse-manufacturing will play a key role in becoming sustainable societies.
In this project, series of RE lectures were given, however the remaining of the learning was left unstructured as are the problem in real industry. Students were given full ownership of the learning, with some key points to report on. Students engaged fully with the module, and this approach to learning has attracted a great number of students at level 3 and 4 who expressed their preference to way of active learning. This unveiled the challenge/lack of understand technical engineering terminologies.
To achieve a sustainable development especially Net-Zero, by the time set by policy makers, engineering is the key driver and RE will play a pivotal role, because to become efficient in absolute terms (energy, material, environment), all existing machines and manufacturing systems need to be revisited and re-engineered by our current and future engineers.
This project has a vision to make teaching and students sustainability tools and ambassadors by investigating into the extent to which we can teach RE to students to solve sustainability problems, and how we could integrate these aspects into teaching.
Reverse Engineering – an Educational Tool for Sustainable development Powerpoint. Only LJMU staff and students have access to this resource
A self-exciting system for percussive-rotary drilling
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Vibration-Assisted Grinding of Mild and Hardened Steel: A Novel Design Vibrating Jig and Process Performance
No full textA self-exciting system for percussive–rotary drilling
No full textA dynamic model for a new principle of self-excited percussive–rotary drilling is
presented. The system uses the stick-slip phenomenon to generate an impact action
superimposed on the drilling process. This is a strongly nonlinear mechanical system
with two-degrees-of-freedom, in which friction-induced vibration is used for
excitation of impacts. The model has to take account of the returning effect that the
impacts have on the parameters of stick-slip motion. The model incorporates friction
force as a function of sliding velocity, where the self-excitation of coupled vibration
of the rotating bit and the striker tend to a steady-state periodic cycle. Dynamic
coupling of vibro-impact action with the stick-slip process brings innovative adaptive
features into the drilling process. [Continues.
High-efficiency Machining of Materials Used in Heavy Power Engineering
No full textAbstractThe study considered issues for improving the efficiency of machining materials used in heavy power engineering on the basis of the development of carbide tools with nanostructured multilayer coatings (NMCC) of high wear resistance. The following compositions of the NMCC were developed for investigation: Ti-TiN-(TiCrAl)N; Zr-ZrN-(ZrNbCrAl)N; Cr-CrAlN-(NbZrCrAl)N; Zr-ZrN-(ZrCrAl)N. Wide-ranging studies of various properties and characteristics of elaborated NMCC, as well as contact parameters of cutting and wear mechanisms for the carbide tools with various compositions of NMCC are used in high-efficiency longitudinal turning material of heavy power mechanical engineering. Received results of research in this study allow establishing a rational coating composition for deposition on carbide tools providing increase of machining efficiency of the materials used in heavy power engineering
A Study of Workpiece Roundness Profile Frequency Components In Cylindrical Plunge Grinding
No full textRevolutionizing Sri Lankan Tea Industry:A Comprehensive Analysis of the Economic Viability of Implementing IoT Applications
No full textThis research focuses on technological innovation's adaptability in the Sri Lankan tea industry and its economic benefits. The four focused areas below were created to address specific knowledge gaps in this research. These objectives correspond to the study's purposes: Identify existing Internet of Things (IoT) applications in the Tea operational process in Sri Lanka. Assess the efficiency and economic sustainability of tea processing under IoT applications. Identify Issues with the existing technological improvement and challenges. Propose feasible autonomous applications according to the financial ability of the Sri Lankan Tea Industry. The research relies on both primary and secondary data. Factory visits provided observational data, and an expert opinion poll was undertaken among tea industry professionals in selected Sri Lankan companies active in the export market. The results of this study have significant policy implications for the tea industry and guide industry stakeholders on the potential of IoT applications to enhance productivity, reduce costs, and improve quality. The findings may be instrumental in guiding decision-making regarding IoT technology adoption and promoting economic sustainability in the Sri Lankan tea industry.</p
