scholarly journals An External Client-Based Approach for the Extract Class Refactoring: A Theoretical Model and an Empirical Approach

2020 ◽  
Vol 10 (17) ◽  
pp. 6038 ◽  
Author(s):  
Musaad Alzahrani ◽  
Saad Alqithami
Keyword(s):  
Theoretical Model ◽  
Open Source ◽  
Empirical Evaluation ◽  
Empirical Approach ◽  
Multiple Methods ◽  
Semantic Relationships ◽  
Novel Approach ◽  
Open Source Systems

A commonly observed ambiguity of a class is simply a reflection of multiple methods’ implementation within an individual class. The process of Extract Class refactoring is, therefore, used to separate the different responsibilities of a class into different classes. A major limitation in existing approaches of the Extract Class refactoring is based on factors that are internal to the class, i.e., structural and semantic relationships between methods, in order to identify and separate the responsibilities of the class which are inadequate in many cases. Thus, we propose a novel approach that exploits the clients of the class to support the Extract Class refactoring. The importance of this approach lies in its usefulness to support existing approaches since it involves factors external to the class, i.e., the clients. Moreover, an extensive empirical evaluation is presented to support the proposed method through the utilization of real classes selected from two open source systems. The result shows the potential of our proposed approach and usefulness that leads to an improvement in the quality of the considered classes.

A Topic Modeling Based Approach for Enhancing Corpus Querying

2019 ◽  
Vol 10 (3) ◽  
pp. 38-50
Author(s):  
Nouh Talal Alhindawi ◽  
Belal Abu Ata ◽  
Lana Mahmoud Obeidat ◽  
Mohammad Subhi Al-Batah ◽  
Muad Abu-Ata
Keyword(s):  
Information Retrieval ◽  
Open Source ◽  
Topic Modeling ◽  
Retrieval Process ◽  
New Novel ◽  
Novel Approach ◽  
Open Source Systems

In information retrieval, the accuracy of the retrieval process is mainly dependent on query terms selection; therefore, the user must choose the needed terms carefully and selectively. Traditionally, the process of selecting query terms is done manually. However, in the last two decades, a lot of research has been directed towards automating the process of choosing and enhancing query terms. In this article, a new novel approach is presented, which relies on topic modeling in query building and expansion. Two open source systems were selected to perform the experiments, results show that adding the topic's term to the user's query clearly improves its quality and thus, improves the ranking results.

scholarly journals Supporting Unit Test Generation via Automated Isolation

2017 ◽  
Vol 61 (2) ◽  
pp. 116 ◽  
Author(s):  
Dávid Honfi ◽  
Zoltán Micskei
Keyword(s):  
Open Source ◽  
Test Generation ◽  
Symbolic Execution ◽  
Source Code ◽  
Unit Test ◽  
Prototype Implementation ◽  
Code Coverage ◽  
Novel Approach ◽  
Dynamic Symbolic Execution

Testing is a significantly time-consuming, yet commonly employed activity to improve the quality of software. Thus, techniques like dynamic symbolic execution were proposed for generating tests only from source code. However, current approaches usually could not create thorough tests for software units with dependencies (e.g. calls to file system or external services). In this paper, we present a novel approach that synthesizes an isolation sandbox, which interacts with the test generator to increase the covered behaviour in the unit under test. The approach automatically transforms the code of the unit under test, and lets the test generator choose values for parameters in the calls to dependencies. The paper presents a prototype implementation that collaborates with the IntelliTest test generator. The automated isolation is evaluated on source code from open-source projects. The results show that the approach can significantly increase the code coverage achieved by the generated tests.

Investment climate and government turnover in russian regions

2014 ◽  
pp. 88-117 ◽  
Author(s):  
G. Syunyaev ◽  
L. Polishchuk
Keyword(s):  
Economic Development ◽  
Theoretical Model ◽  
Private Sector ◽  
Authoritarian Regimes ◽  
Russian Regions ◽  
Investment Climate ◽  
Regional Data ◽  
Endogenous Property Rights ◽  
The Impact

We study the impact of Russian regional governors’ rotation and their affiliation with private sector firms for the quality of investment climate in Russian regions. A theoretical model presented in the paper predicts that these factors taken together improve “endogenous” property rights under authoritarian regimes. This conclusion is confirmed empirically by using Russian regional data for 2002—2010; early in that period gubernatorial elections had been canceled and replaced by federal government’s appointments. This is an indication that under certain conditions government rotation is beneficial for economic development even when democracy is suppressed.

scholarly journals A standardized framework for testing the performance of sleep-tracking technology: step-by-step guidelines and open-source code

SLEEP ◽  
2020 ◽  
Author(s):  
Luca Menghini ◽  
Nicola Cellini ◽  
Aimee Goldstone ◽  
Fiona C Baker ◽  
Massimiliano de Zambotti
Keyword(s):  
Open Source ◽  
Validation Studies ◽  
Large Scale ◽  
Analytical Framework ◽  
Clinical Settings ◽  
Large Scale Data ◽  
Fast Pace ◽  
Epoch Analysis ◽  
Tracking Devices

Abstract Sleep-tracking devices, particularly within the consumer sleep technology (CST) space, are increasingly used in both research and clinical settings, providing new opportunities for large-scale data collection in highly ecological conditions. Due to the fast pace of the CST industry combined with the lack of a standardized framework to evaluate the performance of sleep trackers, their accuracy and reliability in measuring sleep remains largely unknown. Here, we provide a step-by-step analytical framework for evaluating the performance of sleep trackers (including standard actigraphy), as compared with gold-standard polysomnography (PSG) or other reference methods. The analytical guidelines are based on recent recommendations for evaluating and using CST from our group and others (de Zambotti and colleagues; Depner and colleagues), and include raw data organization as well as critical analytical procedures, including discrepancy analysis, Bland–Altman plots, and epoch-by-epoch analysis. Analytical steps are accompanied by open-source R functions (depicted at https://sri-human-sleep.github.io/sleep-trackers-performance/AnalyticalPipeline_v1.0.0.html). In addition, an empirical sample dataset is used to describe and discuss the main outcomes of the proposed pipeline. The guidelines and the accompanying functions are aimed at standardizing the testing of CSTs performance, to not only increase the replicability of validation studies, but also to provide ready-to-use tools to researchers and clinicians. All in all, this work can help to increase the efficiency, interpretation, and quality of validation studies, and to improve the informed adoption of CST in research and clinical settings.

scholarly journals One Song, Many Voices: Dementia and The Power of Music

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 775-775
Author(s):  
Debra Sheets ◽  
Stuart MacDonald ◽  
Andre Smith
Keyword(s):  
High School Students ◽  
Social Inclusion ◽  
Positive Impact ◽  
Social Connections ◽  
Social Connection ◽  
School Students ◽  
Choral Singing ◽  
Novel Approach ◽  
Care Partners

Abstract Choral singing is a novel approach to reduce dementia stigma and social isolation while offering participants a sense of purpose, joy and social connection. The pervasiveness of stigma surrounding dementia remains one of the biggest barriers to living life with dignity following a diagnosis (Alzheimer Society of Canada, 2018). This paper examines how a social inclusion model of dementia care involving an intergenerational choir for people living with dementia, their care partners and high school students can reduce stigma and foster social connections. Multiple methodologies are used to investigate the effects of choir participation on cognition, stress levels, social connections, stigma, and quality of life. Results demonstrate the positive impact of choir participation and indicate that this socially inclusive intervention offers an effective, non-pharmacological alternative for older adults living with dementia in the community. Discussion focuses on the importance of instituting meaningful and engaging dementia-friendly activities at the community level.

scholarly journals Internal Quality Evolution of Open-Source Software Systems

2021 ◽  
Vol 11 (12) ◽  
pp. 5690
Author(s):  
Mamdouh Alenezi
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Software Evolution ◽  
Quality Metrics ◽  
Internal Quality ◽  
Software Systems ◽  
Software Metric ◽  
Significant Difference ◽  
The Relationship

The evolution of software is necessary for the success of software systems. Studying the evolution of software and understanding it is a vocal topic of study in software engineering. One of the primary concepts of software evolution is that the internal quality of a software system declines when it evolves. In this paper, the method of evolution of the internal quality of object-oriented open-source software systems has been examined by applying a software metric approach. More specifically, we analyze how software systems evolve over versions regarding size and the relationship between size and different internal quality metrics. The results and observations of this research include: (i) there is a significant difference between different systems concerning the LOC variable (ii) there is a significant correlation between all pairwise comparisons of internal quality metrics, and (iii) the effect of complexity and inheritance on the LOC was positive and significant, while the effect of Coupling and Cohesion was not significant.

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