A Comparative Analysis of Institutional Repository Software

This proposal outlines the design of a comparative analysis of the four institutional repository software packages that were represented at the 4th International Conference on Open Repositories held in 2009 in Atlanta, Georgia: EPrints, DSpace, Fedora and Zentity (The 4th International Conference on Open Repositories website, https://or09.library.gatech.edu). The study includes 23 qualitative and quantitative measures taken from default installations of the four repositories on a benchmark machine with a predefined base collection. The repositories are also being assessed on the execution of four common workflows: consume, submit, accept, and batch. A panel of external reviewers provided feedback on the design of the study and its evaluative criteria, and input is currently being solicited from the developer and user communities of each repository in order to refine the criteria, measures, data collection methods, and analyses. The aim is to produce a holistic evaluation that will describe the state of the art in repository software packages in a comparative manner, similar in approach to Consumer Reports (Consumer Reports magazine website, http://www.consumerreports.org). The output of this study will be highly useful for repository developers, repository managers, and especially those who are selecting a repository for the first time. As members of these respective communities and the organizations who support them are increasingly collaborating (e.g, DuraSpace), this study will help identify the relative strengths and weaknesses of each repository to inform the "best-of-breed" in future solutions that may be developed. The study’s methods will be presented in a transparent manner with documentation to support their reproducibility by a third party

A Comparative Analysis of Institutional Repository Software

This proposal outlines the design of a comparative analysis of the four institutional repository software packages that were represented at the 4th International Conference on Open Repositories held in 2009 in Atlanta, Georgia: EPrints, DSpace, Fedora and Zentity (The 4th International Conference on Open Repositories website, https://or09.library.gatech.edu). The study includes 23 qualitative and quantitative measures taken from default installations of the four repositories on a benchmark machine with a predefined base collection. The repositories are also being assessed on the execution of four common workflows: consume, submit, accept, and batch. A panel of external reviewers provided feedback on the design of the study and its evaluative criteria, and input is currently being solicited from the developer and user communities of each repository in order to refine the criteria, measures, data collection methods, and analyses. The aim is to produce a holistic evaluation that will describe the state of the art in repository software packages in a comparative manner, similar in approach to Consumer Reports (Consumer Reports magazine website, http://www.consumerreports.org). The output of this study will be highly useful for repository developers, repository managers, and especially those who are selecting a repository for the first time. As members of these respective communities and the organizations who support them are increasingly collaborating (e.g, DuraSpace), this study will help identify the relative strengths and weaknesses of each repository to inform the "best-of-breed" in future solutions that may be developed. The study’s methods will be presented in a transparent manner with documentation to support their reproducibility by a third party

Certain properties of the enhanced power graph associated with a finite group

The enhanced power graph of a finite group $G$, denoted by $\mathcal{P}_E(G)$, is the simple undirected graph whose vertex set is $G$ and two distinct vertices $x, y$ are adjacent if $x, y \in \langle z \rangle$ for some $z \in G$. In this article, we determine all finite groups such that the minimum degree and the vertex connectivity of $\mathcal{P}_E(G)$ are equal. Also, we classify all groups whose (proper) enhanced power graphs are strongly regular. Further, the vertex connectivity of the enhanced power graphs associated to some nilpotent groups is obtained. Finally, we obtain a lower bound and an upper bound for the Wiener index of $\mathcal{P}_E(G)$, where $G$ is a nilpotent group. The finite nilpotent groups attaining these bounds are also characterized.Comment: arXiv admin note: text overlap with arXiv:2207.0464

Entanglement on linked boundaries in Chern-Simons theory with generic gauge groups

We study the entanglement for a state on linked torus boundaries in $3d$ Chern-Simons theory with a generic gauge group and present the asymptotic bounds of R\'enyi entropy at two different limits: (i) large Chern-Simons coupling $k$, and (ii) large rank $r$ of the gauge group. These results show that the R\'enyi entropies cannot diverge faster than $\ln k$ and $\ln r$, respectively. We focus on torus links $T(2,2n)$ with topological linking number $n$. The R\'enyi entropy for these links shows a periodic structure in $n$ and vanishes whenever $n = 0 \text{ (mod } \textsf{p})$, where the integer $\textsf{p}$ is a function of coupling $k$ and rank $r$. We highlight that the refined Chern-Simons link invariants can remove such a periodic structure in $n$.Comment: 31 pages, 5 figure

Thermo-hydraulic performance enhancement of a solar air heater using rotating cylindrical turbulators

A novel concept of rotating cylindrical ribs as artificial roughness in a solar air heater to enhance its thermo-hydraulic performance factor has been investigated using 3D computational fluid dynamics. The rotational speed is varied from 2000 RPM to 10,000 RPM on the static ribs optimised for height (e), diameter (d), longitudinal pitch (P), and transverse pitch (S) at Reynolds number (Re) ranging from 5000 to 24000. The optimised static ribs configuration having e = 3.5 mm, d = 3 mm, S = 20 mm, and P/e = 10 is experimentally validated to establish the accuracy of rotating ribs performance computed using computational fluid dynamics. The maximum thermo-hydraulic performance factor of 1.89 is achieved—32 % higher than the best performance for static ribs—using rotational ribs for the rotational speed of 10,000 RPM at Re = 5000. A comparison between parallel and perpendicular orientations of rotating ribs with respect to the absorber plate establishes that perpendicular ribs configuration is highly desirable to reduce the pressure drop penalty, in turn, enhancing the thermo-hydraulic performance. The performances of the proposed perpendicularly oriented rotating cylindrical ribs are also compared with the performances reported in the literature for static ribs of different shapes having the same orientation with respect to absorber plate and it is observed that rotational ribs outperforms all the other static ribs

Thermo-hydraulic performance enhancement of a solar air heater using rotating cylindrical turbulators

A novel concept of rotating cylindrical ribs as artificial roughness in a solar air heater to enhance its thermo-hydraulic performance factor has been investigated using 3D computational fluid dynamics. The rotational speed is varied from 2000 RPM to 10,000 RPM on the static ribs optimised for height (e), diameter (d), longitudinal pitch (P), and transverse pitch (S) at Reynolds number (Re) ranging from 5000 to 24000. The optimised static ribs configuration having e = 3.5 mm, d = 3 mm, S = 20 mm, and P/e = 10 is experimentally validated to establish the accuracy of rotating ribs performance computed using computational fluid dynamics. The maximum thermo-hydraulic performance factor of 1.89 is achieved—32 % higher than the best performance for static ribs—using rotational ribs for the rotational speed of 10,000 RPM at Re = 5000. A comparison between parallel and perpendicular orientations of rotating ribs with respect to the absorber plate establishes that perpendicular ribs configuration is highly desirable to reduce the pressure drop penalty, in turn, enhancing the thermo-hydraulic performance. The performances of the proposed perpendicularly oriented rotating cylindrical ribs are also compared with the performances reported in the literature for static ribs of different shapes having the same orientation with respect to absorber plate and it is observed that rotational ribs outperforms all the other static ribs

Plant Species Classification Using Transfer Learning by Pretrained Classifier VGG-19

Deep learning is currently the most important branch of machine learning, with applications in speech recognition, computer vision, image classification, and medical imaging analysis. Plant recognition is one of the areas where image classification can be used to identify plant species through their leaves. Botanists devote a significant amount of time to recognizing plant species by personally inspecting. This paper describes a method for dissecting color images of Swedish leaves and identifying plant species. To achieve higher accuracy, the task is completed using transfer learning with the help of pre-trained classifier VGG-19. The four primary processes of classification are image preprocessing, image augmentation, feature extraction, and recognition, which are performed as part of the overall model evaluation. The VGG-19 classifier grasps the characteristics of leaves by employing pre-defined hidden layers such as convolutional layers, max pooling layers, and fully connected layers, and finally uses the soft-max layer to generate a feature representation for all plant classes. The model obtains knowledge connected to aspects of the Swedish leaf dataset, which contains fifteen tree classes, and aids in predicting the proper class of an unknown plant with an accuracy of 99.70% which is higher than previous research works reported.Comment: Under review process in 'IETE Journal of Research