Transactions on Engineering Technologies: Proceedings of World Congress on Engineering 2021

Preface
Contents
Piecewise Monotonic Fitting for Covid-19 Data Analysis of the United Kingdom During 31-01-2020 to 19-11-2021
	1 Introduction
	2 Piecewise Monotonic Approximation
	3 Application to UK Covid-19 Data
		3.1 Covid-19 New Cases
		3.2 Covid-19 New Deaths
	4 Analysis Through the Timeline of the Pandemic
		4.1 New Covid-19 Cases
		4.2 New Covid-19 Deaths
	5 Conclusions
	References
On the Free Boundary Problem for the Low Reynolds Number
	1 Introduction
	2 The Steady Case
	3 The Solution of Problem 1
	4 The Unsteady Case
	5 The Solution of Problem 2
	6 Examples
	7 Conclusion and Future Work
	References
Community Detection on Proximity Networks
	1 Introduction
	2 Community Detection Algorithms
		2.1 Overlapping Algorithms
		2.2 Partitioning Algorithms
	3 Data Sets
	4 Community Structure Evaluation
	5 Results
		5.1 Qualitative Evaluation of the Algorithms
		5.2 Comparing Algorithms with NMI
	6 Conclusion
	References
A Machine-Learnt Approach to Market Segmentation and Purchase Prediction Using Point-Of-Sale (POS) Data
	1 Introduction
	2 Literature Review
		2.1 Methodology-Based and Application-Based Market Segmentation
		2.2 Machine Learning in Market Segmentation
	3 Methodology
	4 Results
	5 Discussion and Conclusion
	References
Feasibility and Benefits of Small Photovoltaic Systems in Ghana
	1 Introduction
	2 Methodology
		2.1 Evaluation Factors
	3 Results and Discussion
		3.1 Stand-Alone Community Centre
		3.2 Grid-tied System
	4 Conclusion
	References
Design of Multiple Bearing Placements for Brush Cutter Vibration Reduction
	1 Introduction
	2 Main Concept and Analysis Method
		2.1 Concept of Span-Tuning Dynamic Vibration Absorbers (ST-DVAs)
		2.2 Finite Element Frequency Response Analysis
	3 Analysis Results and Discussion
		3.1 Resonance Suppression for Multiple Excitation Sources by ST-DVAs
		3.2 Applied Design Method of ST-DVAs
		3.3 Other Result: Installation Position of ST-DVA
	4 Conclusion
	References
Experimental DEM Hybrid Approach for Prediction of Landslide in Ughelli Sandstone
	1 Introduction
	2 Experiments and Discrete Element Modeling
		2.1 Determination of Normal Stiffness and Shear Stiffness in Sandstone
	3 Results
	4 Discussion of Results
	5 Conclusion and Future Work
	References
Extracting the Efficient Model of Cylindrical and Conical Basins from Different Aspect Ratios
	1 Introduction
	2 Methodology
		2.1 Designed Model
		2.2 Mathematical Modeling
		2.3 Numerical Analysis
	3 Results and Discussions
		3.1 Pressure Loss
		3.2 Effect on Channel
		3.3 Effect of Velocity on Vortex Chamber
		3.4 Effect of Pressure on Vortex Chamber
		3.5 Effect on Outlet Pipe Section
		3.6 Observation on Swirling Strength and Vortex Core Velocity
	4 Conclusion
	References