scholarly journals Performance Impact of Optimization Methods on MySQL Document-Based and Relational Databases

2021 ◽  
Vol 11 (15) ◽  
pp. 6794
Author(s):  
Cornelia A. Győrödi ◽  
Diana V. Dumşe-Burescu ◽  
Robert Ş. Győrödi ◽  
Doina R. Zmaranda ◽  
Livia Bandici ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Relational Databases ◽  
Optimization Methods ◽  
Management Systems ◽  
Performance Impact ◽  
Database Structure ◽  
Database Technology ◽  
And Performance ◽  
The Impact

Databases are an important part of today’s applications where large amounts of data need to be stored, processed, and accessed quickly. One of the important criteria when choosing to use a database technology is its data processing performance. In this paper, some methods for optimizing the database structure and queries were applied on two popular open-source database management systems: MySQL as a relational DBMS, and document-based MySQL as a non-relational DBMS. The main objective of this paper was to conduct a comparative analysis of the impact that the proposed optimization methods have on each specific DBMS when carrying out CRUD (CREATE, READ, UPDATE, DELETE) requests. To perform the analysis and performance evaluation of CRUD operations for different amounts of data, a case study testing architecture based on Java was developed and used to show how the databases’ proposed optimization methods can influence the performance of the application, and to highlight the differences in response time and complexity. The results obtained show the degree to which the proposed optimization methods contributed to the application’s performance improvement in the case of both databases; based on these, a detailed analysis and several conclusions are presented to support a decision for choosing a specific approach.

scholarly journals How Do Political Features Influence the Co-Production of Government Projects? A Case Study of a Medium-Sized Chinese City

2021 ◽  
Vol 13 (14) ◽  
pp. 7600
Author(s):  
Wenting Ma ◽  
Rui Mu ◽  
Martin de Jong
Keyword(s):  
Performance Measurement ◽  
Critical Role ◽  
Chinese City ◽  
Production Stages ◽  
Political Background ◽  
The Government ◽  
And Performance ◽  
Western Experience ◽  
The Impact

Co-production is a solution by which the government provides public services. Co-production theory is built upon Western experience and currently focuses on the types of co-production in different policy stages, the barriers and governance strategies for co-production. However, little attention is paid to how political background will influence the co-production process. To fill the gap, we analyzed a case of co-production that occurred in China, and we characterized the political background as consisting of three main political features: political mobility, central–local relations, and performance measurement. Based on an in-depth case study of a government project in a medium-sized Chinese city, the impact and the changes of political features affecting governmental projects in different co-production stages are analyzed and assessed. We find that political features play a critical role in the co-production of China’s large government projects and may separately and jointly affect co-production. Government performance measurement affects the co-design and co-implementation of projects. Political mobility and changes in local government and performance measurement also affect the co-implementation continuity of the project. Political focus affects the co-design of projects. Central-local relations influence the support from higher government and the actual practices of lower government in the co-implementation stage.

Map Width Enhancement Technique for a Turbocharger Compressor

2013 ◽  
Vol 136 (6) ◽  
Author(s):  
Subenuka Sivagnanasundaram ◽  
Stephen Spence ◽  
Juliana Early
Keyword(s):  
Performance Improvement ◽  
Peak Pressure ◽  
Pressure Ratio ◽  
Comparison Study ◽  
Heavy Duty ◽  
Recirculating Flow ◽  
Heavy Duty Diesel ◽  
And Performance ◽  
The Stability ◽  
The Impact

This paper presents an investigation of map width enhancement and the performance improvement of a turbocharger compressor using a series of static vanes in the annular cavity of a classical bleed slot system. The investigation has been carried out using both experimental and numerical analysis. The compressor stage used for this study is from a turbocharger unit used in heavy duty diesel engines of approximately 300 kW. Two types of vanes were designed and added to the annular cavity of the baseline classical bleed slot system. The purpose of the annular cavity vane technique is to remove some of the swirl that can be carried through the bleed slot system, which would influence the pressure ratio. In addition to this, the series of cavity vanes provides a better guidance to the slot recirculating flow before it mixes with the impeller main inlet flow. Better guidance of the flow improves the mixing at the inducer inlet in the circumferential direction. As a consequence, the stability of the compressor is improved at lower flow rates and a wider map can be achieved. The impact of two cavity vane designs on the map width and performance of the compressor was highlighted through a detailed analysis of the impeller flow field. The numerical and experimental study revealed that an effective vane design can improve the map width and pressure ratio characteristic without an efficiency penalty compared to the classical bleed slot system without vanes. The comparison study between the cavity vane and noncavity vane configurations presented in this paper showed that the map width was improved by 14.3% due to a significant reduction in surge flow and the peak pressure ratio was improved by 2.25% with the addition of a series of cavity vanes in the annular cavity of the bleed slot system.

Impact of Organizational Trauma on Workplace Behavior and Performance

2017 ◽  
pp. 869-893
Author(s):  
Ben Tran
Keyword(s):  
Community College ◽  
Workplace Bullying ◽  
Policy Implications ◽  
Workplace Behavior ◽  
Research Reporting ◽  
Community College District ◽  
And Performance ◽  
Organizational Trauma ◽  
The Impact

Research suggests, according to Branch, Ramsay, and Barker (2013), that a significant number of people are exposed to persistent abusive treatment within the workplace, with the majority of studies within Europe indicating that between 10% and 15% of the workforce are exposed to workplace bullying (Zapf, Escartin, Einarsen, Hoel, & Vartia, 2011), with North American research reporting similar prevalence rates. This is a significant, ongoing dilemma for researchers and practitioners, for which an agreed resolution would be useful because of legal and policy implications. Hence, the purpose of this chapter is on the impact of organizational trauma on workplace behavior and performance based on workplace bullying. The chapter is based on a case study regarding a program that is funded by the Department of Education within a community college in the State of California. The community college is one of four community colleges under the same community college district.

scholarly journals Performance Analysis of NoSQL and Relational Databases with CouchDB and MySQL for Application’s Data Storage

2020 ◽  
Vol 10 (23) ◽  
pp. 8524
Author(s):  
Cornelia A. Győrödi ◽  
Diana V. Dumşe-Burescu ◽  
Doina R. Zmaranda ◽  
Robert Ş. Győrödi ◽  
Gianina A. Gabor ◽  
...  
Keyword(s):  
Big Data ◽  
Data Storage ◽  
Relational Databases ◽  
Database Systems ◽  
Application Performance ◽  
Big Data Applications ◽  
Database Technology ◽  
Important Challenge ◽  
Big Data Application ◽  
The Impact

In the current context of emerging several types of database systems (relational and non-relational), choosing the type and database system for storing large amounts of data in today’s big data applications has become an important challenge. In this paper, we aimed to provide a comparative evaluation of two popular open-source database management systems (DBMSs): MySQL as a relational DBMS and, more recently, as a non-relational DBMS, and CouchDB as a non-relational DBMS. This comparison was based on performance evaluation of CRUD (CREATE, READ, UPDATE, DELETE) operations for different amounts of data to show how these two databases could be modeled and used in an application and highlight the differences in the response time and complexity. The main objective of the paper was to make a comparative analysis of the impact that each specific DBMS has on application performance when carrying out CRUD requests. To perform the analysis and to ensure the consistency of tests, two similar applications were developed in Java, one using MySQL and the other one using CouchDB database; these applications were further used to evaluate the time responses for each database technology on the same CRUD operations on the database. Finally, a comprehensive discussion based on the results of the analysis was performed that centered on the results obtained and several conclusions were revealed. Advantages and drawbacks for each DBMS are outlined to support a decision for choosing a specific type of DBMS that could be used in a big data application.

Preliminary Design and Performance of Counter Rotating Turbines for Open Rotors: Part II — 0-D Methodology and Case Study for a 160 PAX Aircraft

2016 ◽  
Author(s):  
Pablo Bellocq ◽  
Inaki Garmendia ◽  
Jordane Legrand ◽  
Vishal Sethi
Keyword(s):  
Design Methodology ◽  
Design Space Exploration ◽  
Design Space ◽  
Space Exploration ◽  
Preliminary Design ◽  
Regulatory Constraints ◽  
Trade Offs ◽  
And Performance ◽  
The Impact

Direct Drive Open Rotors (DDORs) have the potential to significantly reduce fuel consumption and emissions relative to conventional turbofans. However, this engine architecture presents many design and operational challenges both at engine and aircraft level. At preliminary design stages, a broad design space exploration is required to identify potential optimum design regions and to understand the main trade offs of this novel engine architecture. These assessments may also aid the development process when compromises need to be performed as a consequence of design, operational or regulatory constraints. Design space exploration assessments are done with 0-D or 1-D models for computational purposes. These simplified 0-D and 1-D models have to capture the impact of the independent variation of the main design and control variables of the engine. Historically, it appears that for preliminary design studies of DDORs, Counter Rotating Turbines (CRTs) have been modelled as conventional turbines and therefore it was not possible to assess the impact of the variation of the number of stages (Nb) of the CRT and rotational speed of the propellers. Additionally, no preliminary design methodology for CRTs was found in the public domain. Part I of this two-part publication proposes a 1-D preliminary design methodology for DDOR CRTs which allows an independent definition of both parts of the CRT. A method for calculating the off-design performance of a known CRT design is also described. In Part II, a 0-D design point efficiency calculation for CRTs is proposed and verified with the 1-D methods. The 1-D and 0-D CRT models were used in an engine control and design space exploration case study of a DDOR with a 4.26m diameter an 10% clipped propeller for a 160 PAX aircraft. For this application: • the design and performance of a 20 stage CRT rotating at 860 rpm (both drums) obtained with the 1-D methods is presented. • differently from geared open rotors, negligible cruise fuel savings can be achieved by an advanced propeller control. • for rotational speeds between 750 and 880 rpm (relatively low speeds for reduced noise), 22 and 20 stages CRTs are required. • engine weight can be kept constant for different design rotational speeds by using the minimum required Nb. • for any target engine weight, TOC and cruise SFC are reduced by reducing the rotational speeds and increasing Nb (also favourable for reducing CRP noise). However additional CRT stages increase engine drag, mechanical complexity and cost.

NAO Robots Collaboration for Object Manipulation

2013 ◽  
Vol 332 ◽  
pp. 218-223 ◽  
Author(s):  
Alina Ninett Panfir ◽  
Răzvan Boboc ◽  
Gheorghe Leonte Mogan
Keyword(s):  
Object Manipulation ◽  
Humanoid Robots ◽  
New Method ◽  
Successful Implementation ◽  
Manufacturing Environment ◽  
Complex Operation ◽  
And Performance ◽  
The Impact ◽  
Specific Scenario

This paper proposes a new method of collaboration within a team of twoindividual NAO robots that should execute together a complex operation. The Naorobots are developed so as not only to act individually, but also to cooperatewith other robots if they cannot accomplish the operation alone. This paperpresents a case study demonstrating the integration of the humanoid roboticsplatform Nao within a cooperation application. This specific scenario ofinterest takes place in a small simulated manufacturing environment; while thetask being the storage of a big object, with different shape and weight. Thisscenario is used to observe the impact and performance that this particularteam of humanoid robots has in an industrial environment.Finally we present the successful implementation of robot – robot cooperationcapabilities inspired by human behaviour.

scholarly journals The Impact of Performance Audit: the New Zealand Experience

2021 ◽  
Author(s):  
◽  
Nurul Athirah Abd Manaf
Keyword(s):  
New Zealand ◽  
Public Sector ◽  
Performance Improvement ◽  
Managerial Practices ◽  
The Public ◽  
Performance Audit ◽  
And Performance ◽  
Auditor General ◽  
The Many ◽  
The Impact

<p>Performance audit, compared to the traditional financial and compliance audits, is a relatively new innovation that emerged amidst accountability concerns in the public sector. Economic crises, ministerial scandal and inefficiencies were among the impetus that led the public to demand better performance and greater accountability in the public sector, and performance audit was among the many responses to such demand. In New Zealand, performance audit is carried out by the Controller and Auditor General (the AG) under the mandate granted by the Public Audit Act 2001. Adapting the methodology from grounded theory, this study looks at the impact of performance audit on seven entities audited in 2006 by the AG. This study found that the entities were impacted through the manifestation of implemented audit recommendations and the attainment of performance audit goals. In particular, there is a high acceptance and implementation rate to the audit recommendations made in the seven audits. The implementation of accepted recommendations consequently led to the changes within the entities in terms of managerial practices, as well as internal systems and processes. In some entities, these changes were translated into performance improvement, where the entities experienced changes in the way that they carried out their operations. However, based on interviewees' accounts being the auditees of the audits, most interviewees viewed performance audit as having a greater role for performance accountability compared to performance improvement. Whilst the auditees found the audit recommendations useful, the impact on performance in their view has not been significant. Rather, the auditees viewed performance audit as having a more important role as an assurance tool in terms of their accountability to the public.</p>

scholarly journals Visualizing Student Behavior and Performance in an Online Course

2021 ◽  
Author(s):  
Michael J Parker
Keyword(s):  
Online Learning ◽  
Student Behavior ◽  
Online Course ◽  
Course Structure ◽  
Course Material ◽  
Potential Benefits ◽  
And Performance ◽  
The Impact ◽  
The Relationship

Online learning has been an area of tremendous growth in recent years [1], further accelerated by necessity during the coronavirus pandemic [2]. Without the feedback provided by synchronous sessions, however, instructors may lack ongoing insight into students’ progress and performance in fully asynchronous online offerings. Providing greater visibility into students’ online learning behavior has several potential benefits: 1) teachers who seek to provide live sessions that depend on knowledge from asynchronous resources will have a better gauge of students’ preparation; 2) enhanced understanding of the relationship between student pacing and performance can help teachers and researchers characterize the impact of timely engagement with online course material; 3) providing a means of monitoring the effect of changes in course structure or incentives may guide course designers/planners in continuous improvement; and 4) visualizations that illustrate the relationship between students’ course progress and performance have the promise of allowing teachers to take steps early to positively affect students’ outcomes. In this visual case study, visualizations are provided for exploration of the relationship between student progress and performance in an online medicine-related course.

scholarly journals PERAN MOTIVASI DAN KINERJA PENYULUH PERTANIAN DALAM MENGUBAH PERILAKU PETANI JAGUNG

2018 ◽  
Vol 14 (3) ◽  
pp. 225
Author(s):  
Mohamad Ikbalbahua
Keyword(s):  
Agricultural Extension ◽  
Coefficient Of Determination ◽  
Influence Coefficient ◽  
Performance Impact ◽  
Ex Post ◽  
Ex Post Facto ◽  
Farmer Behavior ◽  
And Performance ◽  
The Impact

The purpose of this study are: (1) identify the influence of competence that can improve the performance of agricultural extension in the development of maize farming, (2) examine the influence of competence and performance of agricultural extension on the behavior of corn farmers, and (3) analysis the impact of extension performance agriculture corn farmers on changing behaviors. Research conducted in Gorontalo Province in Maret until Juni 2018. The study was "ex post facto," The smallest unit of observation is the agricultural extension numbering 118 persons. Data collected through interviews using a questionnaire. Data were analyzed using LISREL 8.30 SEM program. Results showed the influence of competence on the performance of agricultural extension is influenced by the dimensions of Capacity building and needs affiliated. Variable motivation of extension agents indirect influence on corn farmers' behavior changes, while the performance of agricultural extension through the dimensions of quality of appreciation of cultural diversity and quality of management information direct impact on farmer behavior with the influence coefficient of 0.83 unit. Impact of agricultural extension agent performance impact on changing behaviors through a dimension of competence corn farmers and farmers with farmer participation coefficient of determination (R2) equal to 69 percent.

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