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Article
Publication date: 27 May 2022

Faruk Yalcin, Ugur Arifoglu and Irfan Yazici

This paper aims to present the design and implementation of a new general-purpose single-phase buck-type inverter.

Abstract

Purpose

This paper aims to present the design and implementation of a new general-purpose single-phase buck-type inverter.

Design/methodology/approach

The operation of the proposed inverter is based on the general-purpose buck converter. The proposed buck-type inverter topology is designed with reduced numbers of passive and active elements to minimize design cost and complexity. Also, an efficient hybrid control technique based on the proportional‐integral‐derivative (PID) supported by open-loop control signal is offered for the control of the proposed inverter. The proposed hybrid control method improves the performance of the PID controller during the change of inverter operation parameters. A close to single-phase sine wave output voltage with low total harmonic distortion (THD) can be produced by the proposed inverter in a wide range of voltage and frequency lower than the inverter input voltage value.

Findings

Simulation and experimental test studies are applied to the proposed inverter. The experimental laboratory setup is built for 0–50 Hz, 0–100 Vp, 0.5 kW. Both the simulation and the experimental test results show that the single-phase inverter can produce close to sine wave output voltage with THD level under 5% in a wide range of frequency for various operating conditions and for different loads.

Originality/value

In this paper, a new topology and a new hybrid control technique that are patented by the corresponding author are implemented for a single-phase buck-type inverter through a scientific project. The operating results of the study reveal the efficient operating capability with a simple topology structure.

Details

Circuit World, vol. 48 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 28 July 2021

Claudia-Inés Sepúlveda-Rivillas, Joaquin Alegre and Victor Oltra

The purpose of this study is to empirically investigate how knowledge-based organizational support (KOS) influences organizational performance through project management.

1039

Abstract

Purpose

The purpose of this study is to empirically investigate how knowledge-based organizational support (KOS) influences organizational performance through project management.

Design/methodology/approach

Data were obtained from a survey and from archival sources with a time lag for the dependent variable; structural equation modeling was used to analyze the data. The sample was made up of 106 organizations in Colombia, considering two key respondents from each organization: general manager and project manager.

Findings

Results show that KOS is an antecedent of project management and project performance. Furthermore, project management and project performance play a mediating role between KOS and organizational performance.

Research limitations/implications

Research limitations are the following: use of cross-sectional data with a time lag, one single unit of analysis, organizational performance analyzed only from a financial perspective. Despite these limitations, the paper puts forward relevant implications that bridge knowledge management and project management literature by clarifying the conditions under which knowledge organizational support generates a significant impact on organizational performance. Intellectual capital and knowledge management dynamic capabilities play a relevant role in this connection.

Practical implications

The findings have important practical implications: decision-makers are to allocate effectively hard and soft resources to configure a knowledge-based infrastructure, through the development of intellectual capital and knowledge management dynamic capabilities.

Social implications

The findings are generalizable to projects management in the context of non-government organizations or other social-oriented initiatives.

Originality/value

This study assumes and operationalizes organizational support from a knowledge-based perspective, represented by intellectual capital and knowledge management dynamic capabilities, providing empirical evidence of the way KOS influences organizational performance through project management and project performance.

Article
Publication date: 19 April 2022

Adnan Alghail, Liu Yao and Mohammed Abbas

The factors for higher education institutions’ (HEIs) project management failure have been studied for several years. One of the issues is a lack of tools to combine their…

Abstract

Purpose

The factors for higher education institutions’ (HEIs) project management failure have been studied for several years. One of the issues is a lack of tools to combine their knowledge infrastructure capabilities (KIC) with project management (PM) to examine these infrastructures and monitor maturity. There are several project management maturity (PMM) models available. However, there are just a few empirical studies that support the three knowledge infrastructure capabilities and PMM integrations. As a result, the current research aims to suggest a new conceptual model, KIC-knowledge management (KM), and assess a research model that includes the three knowledge infrastructure capabilities as a prerequisite to elevate the PMM.

Design/methodology/approach

Partial least squares structural equation modeling (PLS-SEM) is used to evaluate the proposed research model. The study’s hypotheses were also examined using a sample of 352 respondents from PM departments at ten Yemeni public universities.

Findings

The study found that if the three key knowledge infrastructure capabilities integrate into the PMs, then it will help HEIs to perform project tasks more effectively and efficiently. Also, it will improve the PM maturity level if all the three capabilities positively effect PMM.

Research limitations/implications

The study findings cannot be generalized to other industries because the collected date were with the Yemeni public universities’ context. Also, the new proposed model can be assessed in various sectors to increase the validity of the model. One more thing, future academics can conduct qualitative research study to validate again the proposed model.

Practical implications

Project managers can develop and improve their organization’s effectiveness and performance by focusing on these findings and using the developed model. Also, the findings of this study can be used as a benchmark for evaluating initiatives and knowledge-based governmental entities.

Social implications

It is an opportunity for knowledge-based governmental entities particularly and other organizations to elevate most of projects to achieve a supreme level of maturity. Also, this study will assist employees to understand the relationship between KICs and projects within HEIs in Yemen.

Originality/value

This paper is among the first to empirically study the impact of the three knowledge infrastructure capabilities toward PMM. It links between two important domains: KM and PM.

Details

VINE Journal of Information and Knowledge Management Systems, vol. 54 no. 4
Type: Research Article
ISSN: 2059-5891

Keywords

Article
Publication date: 27 July 2012

Mariam Rehman, Vatcharaporn Esichaikul and Muhammad Kamal

The purpose of this paper is to identify critical factors that enable citizens to adopt e‐Government services in a society which is at a rudimentary stage of e‐Government…

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Abstract

Purpose

The purpose of this paper is to identify critical factors that enable citizens to adopt e‐Government services in a society which is at a rudimentary stage of e‐Government adoption. To achieve the objective of the research study, an integrated conceptual model has been proposed and validated which is based on sound theoretical conditions, keeping in view the local context of Pakistani society.

Design/methodology/approach

An integrated conceptual model is proposed highlighting a comprehensive set of potential factors influencing the adoption of e‐Government services. The conceptual model was developed using related literature review and also by conducting expert reviews with government officials, academic researchers and software engineers in Pakistan.

Findings

From expert reviews, the results indicate that awareness, trust in the internet and trust in the government are the significant variables specific to the context of Pakistani society. The results of this study prove that awareness is a significant variable having influence on the citizens' intention to use e‐Government services, either to get information or to perform a transaction using the government web site. Information quality is found to be a significant variable when getting information from the government website. Perceived ease of use, service quality and transaction security are significant variables which influence the citizens' intention to perform transactions with the government.

Research limitations/implications

An integrated conceptual model is a robust way to explore the key factors that have great influence on e‐Government adoption. The target respondents for this study are internet users. In future, the research work will be extended by including technology divide citizens called offline respondents, i.e. less frequent internet users. The results of online and offline respondents are compared so that the perception of technology divide citizens may also be included to identify the factors influencing the adoption of e‐Government services.

Practical implications

The key findings are useful for policy makers and decision makers, for a real understanding of the needs of the citizens. The proposed model can be used as a guideline for e‐Government strategy formulation and implementation for the Government of Pakistan.

Originality/value

To address the originality, an integrated conceptual model is proposed to overcome the shortcomings of the previous models by adding factors and their respective variables to make the model more comprehensive. Later, the proposed conceptual model is customized and also validated according to the local context of Pakistani society.

Details

Transforming Government: People, Process and Policy, vol. 6 no. 3
Type: Research Article
ISSN: 1750-6166

Keywords

Article
Publication date: 31 May 2021

Seda Yıldırım and Seda H. Bostancı

This study aims to explore the key factors in achieving an efficient e-government portal management system from a citizen perspective. Accordingly, this study focuses on…

Abstract

Purpose

This study aims to explore the key factors in achieving an efficient e-government portal management system from a citizen perspective. Accordingly, this study focuses on explaining how an e-government portal should manage its digital public services for citizens efficiently.

Design/methodology/approach

This study employs a qualitative research design. As a sample case, this study preferred to analyze the Turkish e-government portal. The data is based on available open access data and information from the Turkish e-government portal, which is called e-Government Gateway in practice. In addition, the data of TURKSTAT (Turkish Statistical Institute) were used to determine the general profile of citizens about Internet skills and usage. Then, the data is analyzed by descriptive content analysis.

Findings

As a result of descriptive findings, user type, digital platform options, security and access options, and digital public service classification are all found as important factors for providing a well-designed e-government portal system from a citizen perspective. Especially, citizens should be informed about using options and service categories and types to be accessed by the e-government portal. Social media tools are efficient factors when informing citizens about the e-government portal and communicating with them.

Research limitations/implications

This study provides an original model to explain how the Turkish e-government portal works from a citizen perspective. However, there are some limitations to the study. The findings and suggestions are based on the Turkish e-government portal and its digital public service management. Also, this study evaluates the efficiency of the e-government portal management from a citizen perspective. Future studies can investigate e-government portal management for different countries by different approaches or research designs.

Practical implications

Based on the Turkey case, it is determined that creating an e-government portal with having up-to-date public services, including both web-based and mobile-based platforms, will support the adoption and use of e-government portals.

Social implications

The digital transformation of government is almost the main issue for policymakers in the world. But, this transformation process has some risk factors as well as challenges. To overcome these challenges, policymakers should design flexible and adaptable digital portals and systems to provide easy-to-use and self-use options for the citizens.

Originality/value

This study reveals key factors for efficient e-government portal management by providing descriptive evidence from Turkey. The main contribution of this study is expected to give practical implications and to guide other countries about the adoption of efficient e-government portals by citizens.

Details

World Journal of Science, Technology and Sustainable Development, vol. 18 no. 3
Type: Research Article
ISSN: 2042-5945

Keywords

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