Journal of Engineering Research and Reports <p style="text-align: justify;"><strong>Journal of Engineering Research and Reports</strong>&nbsp;<strong>(ISSN: 2582-2926)</strong> aims to publish high-quality papers in all areas&nbsp;of engineering.&nbsp;The journal also encourages the submission of useful reports of negative results. This is a quality controlled,&nbsp;OPEN&nbsp;peer-reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Journal of Engineering Research and Reports 2582-2926 Relationship between Worship Time and Attendance in Orthodox Church, Southern Nigeria <p>The perturbation in members worship attendance data with respect to service duration and a general impression among members, that worship attendance recorded at sessional services, was due to the worship duration, gave rise to this investigative research. There has never been a study in this relation of worship time and members attendance in the church.&nbsp; This study therefore seeks to clarify thinking, in the service time and attendance relationships among the worshipers. To satisfy the needs of the relationships, a correlation analysis was conducted using available data from 62weekly service observations for an orthodox church in south-south Nigeria, by applying parametric and nonparametric correlation methods. The correlations coefficient were obtained by using the Pearson, Kendall and Spearman correlation methods which showed 63, 53 and 66% correlations respectively as well as a significant value of 0.000 result for each individual methods. The results show that there is a significant relationship that exists between both variables under consideration.&nbsp; This insightful and informative research outcome will disabuse or soothe the minds of these members as well as guide the church leadership’s poise in membership growth, development and management of gospel dissemination across sub-Saharan Africa.</p> O. C. Ezeanyim C. O. Nwankwo A. O. Umeozokwere ##submission.copyrightStatement## 2020-11-21 2020-11-21 6 12 10.9734/jerr/2020/v19i117220 Design of Fundamental Power Coupler of 5 Cell Elliptical SRF Cavity Using CST Microwave Studio <p>A 5 cell elliptical cavity prototype has been build to accelerate the 100 MeV high beam of protons [1]. For cavity = 0.61 β g at 650 MHz in which the cavity structure is optimized by using the code from SUPERFISH [2]. The Q value of the cavity measured is 0.61x10<sup>9</sup> for 4.2 K. In the frequency range 2 – 5 GHz with CST MICROWAVE STUDIO [3]. It has been designed taking into account the advantages of both the waveguide type and coaxial type coupler This paper explains the current design of the cavity with a different angle of aperture and wall which have better mechanical stability and flatness, consisting of facilities for surface processing and less loss of beam. In this paper, the fundamental power coupler of a 5-cell 650MHz elliptical SRF cavity has been designed using CST MICROWAVE STUDIO. Here we have considered the ceramic window matching and co-axial to rectangular waveguide matching for the power coupler.</p> Rajdip Das B. N. Biswas ##submission.copyrightStatement## 2020-11-23 2020-11-23 13 24 10.9734/jerr/2020/v19i117221 Hydraulic Fracture Geometry Modeling Techniques for Extracting Unconventional Reservoirs <p>This study aims to provide a comprehensive review of all hydraulic fracture geometry modeling techniques available in the conventional and unconventional reservoirs. We are introducing a comparison study between major available hydraulic fracture modeling techniques, advantages, and disadvantages of each one according to the latest related studies. The study includes the three general families of models: 2D models, pseudo-3D models, and fully 3D models. Consequently, the results of this work can be used for selecting the proper model to simulate or stimulate the reservoir to enhance oil recovery using hydraulic fracturing. Also, these results can be used for any future updates related to hydraulic fracturing stimulation based on the comparisons that were conducted.</p> Mohamed Ali Khalil Abdunaser Omar Susi ##submission.copyrightStatement## 2020-11-20 2020-11-20 1 5 10.9734/jerr/2020/v19i117219