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Article
Publication date: 15 June 2021

Deniz Zargari Afshar and Payam Alemi

At first, the organic/inorganic and hybrid PV materials by their electrical model are described. Then the proposed converter topology, circuit analysis and various operating modes…

Abstract

Purpose

At first, the organic/inorganic and hybrid PV materials by their electrical model are described. Then the proposed converter topology, circuit analysis and various operating modes of converter according to on/off timing of switches are investigated. The current and voltage in the converter components are illustrated and the voltage gain and switching stress of proposed converter are presented. Finally, to show the effectiveness of the proposed converter, the power loss analysis is provided and the simulation is done in PSIM software. In the last section, the advantages of the proposed topology of higher efficiency by lower number of components in compare with other conventional topologies are presented.

Design/methodology/approach

In this paper, an improved topology of DC-DC converter based on VL technique is proposed for Perovskite Solar cells (PeSCs). The PeSCs attracted a lot of interest due to their potential in combining the advantages of both organic and inorganic components. The proposed converter by using fewer components and higher output voltage generation in compare with conventional ones could be a good candidate for PeSCs due to lower efficiency of this cells. The performance of converter is expressed in continuous conduction mode (CCM) and discontinuous conduction mode (DCM), and the boundary conditions for the proposed converter is presented.

Findings

By using VL technique, this converter is used to boost the lower output voltage levels of PeSCs for grid connection. The PV cell output voltage is increased from 24.5 V to 106 V by proposed converter topology. The step-by-step voltage increasing by charging and discharging of inductor and capacitor is used for boosting the input voltage. By comparing other converters, there is no design complexity in the proposed converter structure, and the power loss is much reduced which increases the converter efficiency. On the other hand, due to using lower number of elements of energy storage elements such as inductors and capacitors, the converter cost is also diminished. Therefore, the design topology simplicity which result simple control algorithm and lower number of components which diminish the system cost by appropriate voltage boosting capability are the main advantages of this proposed topology for new PeSCs which don’t have enough efficiency in compare with old Si PV cells.

Originality/value

In this paper, by using the lower number of components a new structure of DC-DC converter based on the VL technique is proposed. The advantages of this converter such as the simplicity, easier control and high voltage gain by lower power loss, could make this converter a good candidate for new PeSCs where the system whole efficiency will be a critical point to have the unique properties of this new materials in lower loss.

Details

Circuit World, vol. 48 no. 2
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 10 June 2021

Mi Tang, Hongmei Zhou, Qingyan Yan, Ruoyu Li and Hui Lu

Healthcare employs informatics to offer its services through information technology where the social network can aid virtual medical learning. Since the usage of the internet and…

Abstract

Purpose

Healthcare employs informatics to offer its services through information technology where the social network can aid virtual medical learning. Since the usage of the internet and other electronic tools for medical services delivery is at the initial stage, it is essential to examine the factors that condition patients and medical elements in a virtual environment can develop relationship models on the health services. So, the authors have systematically reviewed virtual medical learning and offered some suggestions for the upcoming works. The authors have also discovered gaps in the state-of-the-art papers and provided solutions for them.

Design/methodology/approach

Numerous novel advancements have changed the old exercise of therapeutic and analytic learning. Virtual spaces have quickly turned into a section of the learning technology vision. Given the importance of its achievements and endless low-cost expansion of the educational system, virtual education has been considered as one of the issues raised by the information communities. Medicine and health are some of the most important fields in virtual technologies. Hence, in this paper, we have used a systematic literature review to deeply examine virtual medical learning. After establishing exclusion and inclusion criteria, an independent systematic search in Google Scholar, ACM, Scopus, Eric, Science Direct, Springer link, Emerald, Global ProQuest and IEEE for relevant studies have been performed, and 21 papers have been analyzed. Detailed data have been mined out of the papers.

Findings

The authors have found that virtual medical learning improves and expands the knowledge core and meaningfully affects the exercise. Virtual learning (VL) has been used in many therapeutic zones, like therapeutic learning, surgery, diagnosing, combining and regularizing processes. It has presented a fundamental access point and a referral mechanism for all of a course's component communities. It can also simplify communicative education, allowing learners to get abilities before applying them in a real-world situation. Also, the communicative characteristics of different VL programs can somehow be like direct teaching.

Research limitations/implications

Some excellent work may be removed owing to applying the filters to select the primary papers. Surveying all the documents on the topic of virtual medical learning is impossible, too. Nevertheless, the authors have tried to present a perfect survey of virtual medical learning. The results will be helpful for scholars to propose better virtual medical learning techniques.

Practical implications

E-learning has become an indispensable additional learning tool in medical education. The introduction of new learning technologies, the exponential growth of Internet usage and the advent of the World Wide Web can change the face of higher education. The results will be helpful for scholars for the upcoming works. The application of a literature review of partial least squares theory was useful for offering comprehensive literary coverage and completing the knowledge development analysis. The authors have backed scholars and experts for better understanding the development of virtual medical learning systems via presenting comparative data and scrutinizing the present advances.

Originality/value

The paper enhances intellectual knowledge by improving the conception of virtual medical learning. It informs the development, use of virtual medical learning and the upcoming works. The lack of comprehensive papers in this field has increased the importance of this paper. The present paper can handle the pace of publications.

Article
Publication date: 1 February 1948

A.J. Schroeder

FIG. 67: The by‐work for fixing the cores (a) and (b) is complicated owing to the undercutting (u) and the projection (p). The joint securing of both cores is difficult. The cores…

Abstract

FIG. 67: The by‐work for fixing the cores (a) and (b) is complicated owing to the undercutting (u) and the projection (p). The joint securing of both cores is difficult. The cores or the mould are easily damaged. The necessary patchwork means additional expense.

Details

Aircraft Engineering and Aerospace Technology, vol. 20 no. 2
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 January 1948

A.J. Schroeder

(1) Casting technique comprises the methods of working in which liquid metal is poured into moulds.

Abstract

(1) Casting technique comprises the methods of working in which liquid metal is poured into moulds.

Details

Aircraft Engineering and Aerospace Technology, vol. 20 no. 1
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 3 August 2021

Mahdi Bohlouli, Omed Hassan Ahmed, Ali Ehsani, Marwan Yassin Ghafour, Hawkar Kamaran Hama, Mehdi Hosseinzadeh and Aram Mahmood Ahmed

Many people have been dying as a result of medical errors. Offering clinical learning can lead to better medical care. Clinics have conventionally incorporated direct modality to…

Abstract

Purpose

Many people have been dying as a result of medical errors. Offering clinical learning can lead to better medical care. Clinics have conventionally incorporated direct modality to teach personnel. However, they are now starting to take electronic learning (e-learning) mechanisms to facilitate training at work or other suitable places. The objective of this study is to identify and prioritize the medical learning system in developing countries. Therefore, this paper aims at describing a line of research for developing medical learning systems.

Design/methodology/approach

Nowadays, organizations face fast markets' changing, competition strategies, technological innovations and accessibility of medical information. However, the developing world faces a series of health crises that threaten millions of people's lives. Lack of infrastructure and trained, experienced staff are considered essential barriers to scaling up treatment for these diseases. Promoting medical learning systems in developing countries can meet these challenges. This study identifies multiple factors that influence the success of e-learning systems from the literature. The authors have presented a systematic literature review (SLR) up to 2019 on medical learning systems in developing countries. The authors have identified 109 articles and finally selected 17 of them via article choosing procedures.

Findings

The paper has shown that e-learning systems offer significant advantages for the medical sector of developing countries. The authors have found that executive, administrative and technological parameters have substantial effects on implementing e-learning in the medical field. Learning management systems offer a virtual method of augmented and quicker interactions between the learners and teachers and fast efficient instructive procedures, using computer and Internet technologies in learning procedures and presenting several teaching-learning devices.

Research limitations/implications

The authors have limited the search to Scopus, Google Scholar, Emerald, Science Direct, IEEE, PLoS, BMC and ABI/Inform. Many academic journals probably provide a good picture of the related articles, too. This study has only reviewed the articles extracted based on some keywords such as “medical learning systems,” “medical learning environment” and “developing countries.” Medical learning systems might not have been published with those specific keywords. Also, there is a requirement for more research with the use of other methodologies. Lastly, non-English publications have been removed. There could be more potential related papers published in languages other than English.

Practical implications

This paper helps physicians and scholars better understand the clinical learning systems in developing countries. Also, the outcomes can aid hospital managers to speed up the implementation of e-learning mechanisms. This research might also enable the authors to have a role in the body of knowledge and experience, so weakening the picture of the developing country's begging bowl is constantly requesting help. The authors hoped that their recommendations aid clinical educators, particularly in developing countries, adopt the trends in clinical education in a changing world.

Originality/value

This paper is of the pioneers systematically reviewing the adoption of medical learning, specifically in developing countries.

Details

Kybernetes, vol. 51 no. 11
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 10 January 2018

Irene Lopatovska, Tiffany Carcamo, Nicholas Dease, Elijah Jonas, Simen Kot, Grace Pamperien, Anthony Volpe and Kurt Yalcin

In an effort to advance visual literacy (VL) education, the purpose of this paper is to develop and test a VL instruction program for 2.5-4-year-old children in a public library…

1029

Abstract

Purpose

In an effort to advance visual literacy (VL) education, the purpose of this paper is to develop and test a VL instruction program for 2.5-4-year-old children in a public library setting.

Design/methodology/approach

The study was designed as a series of VL workshops for young public library visitors. Each workshop collected information about children’s existing VL knowledge, introduced them to new visual concepts, and measured their engagement and comprehension of the newly acquired material. The study data were collected via questionnaires and observations.

Findings

Most of the children who participated in the study workshops showed a solid baseline knowledge of colors, lines, shapes and textures and were actively engaged in instruction. After the instruction, children generally showed an improved understanding of the newly introduced VL concepts and were able to answer questions related to the new concepts, recognize them in images, and apply them in art projects.

Research limitations/implications

The study relied on a relatively small sample of library visitors in an affluent neighborhood. The findings are influenced by variations in the topics and delivery methods of instruction. The study findings might not be generalizable beyond the US context.

Practical implications

The study methods and findings would be useful to VL educators who work with children.

Social implications

As information continues to proliferate in non-textual contexts, VL is becoming an increasingly important educational goal. The study advances a VL agenda and advocates for introducing VL early in life.

Originality/value

The authors are not aware of any other study that tested VL instruction on a group of very young children in a public library.

Details

Journal of Documentation, vol. 74 no. 3
Type: Research Article
ISSN: 0022-0418

Keywords

Article
Publication date: 7 June 2022

Pritika Reddy, Bibhya Sharma, Kaylash Chaudhary, Osaiasi Lolohea and Robert Tamath

The purpose of this study is to evaluate student visual literacy skills using the newly designed visual literacy framework and visual literacy (VL) scale.

Abstract

Purpose

The purpose of this study is to evaluate student visual literacy skills using the newly designed visual literacy framework and visual literacy (VL) scale.

Design/methodology/approach

It includes a newly designed framework, a self-reporting questionnaire and a scale to evaluate an individual's VL skills and overall competency. The self-reporting questionnaire consists of 13 items with a five-point Likert scale.

Findings

The newly developed VL skill scale assessed the Fiji students’ competency (i.e. identify, understand, evaluate and communicate using visuals). The mean for the 13 items on VL skills showed average results, but 46.33% recorded high visual literacy competencies. The multiple linear regression analysis outcomes showed all 13 skills demonstrated significant contributions to becoming visually literate.

Research limitations/implications

The limitation of this study is that the questionnaire is self-reporting, so the evaluation can be highly rated. The implications are that relevant stakeholders will be able to devise strategies and content to improve visual literacy in Fiji.

Practical implications

Images are playing an important role today, especially after COVID-19, which forced the education system to go online. Online learning involves a lot of visuals, and as such, visual literacy is important to students so that they can successfully learn online. This paper brings out the important aspects of visual literacy, which needs to be understood by the students.

Social implications

In society, everything involves visuals. This paper introduces a visual literacy scale and a visual literacy tool to measure the visual competencies of individuals. If people understand the components of visual literacy, then visual competencies of the people will also improve.

Originality/value

To the best of the authors’ knowledge, this paper is the first one on evaluating visual literacy competencies in Fiji and also in the South Pacific. The visual literacy tool is also new to the world.

Details

Interactive Technology and Smart Education, vol. 20 no. 4
Type: Research Article
ISSN: 1741-5659

Keywords

Article
Publication date: 9 November 2015

Sanjay Sharma and Sanjaysingh Vijaysingh Patil

The purpose of this paper is to establish correlations among the input variables of production within themselves and input variables of consumption within themselves and to…

Abstract

Purpose

The purpose of this paper is to establish correlations among the input variables of production within themselves and input variables of consumption within themselves and to forecast the production and consumption of the rice.

Design/methodology/approach

The production and consumption of rice crop is governed by diverse variables. In the present study five key input variables for production of rice based on literature review and the authenticated data available from agricultural sources have been selected. These variables are area sown, agricultural workers (AW), area irrigated, growth rate and yield per hectare. On similar basis four key input variables responsible for consumption of rice are considered, namely, price of rice, population, poverty ratio and per capita net national product (NNP).

Findings

Correlation analysis showed that priority wise production of rice depends upon yield per hectare, percentage irrigation, AW and area sown. The growth rate is found to be having insignificant correlation with other variables of production and hence was omitted from subsequent study. Correlation analysis also showed that priority wise consumption depends upon whole sale price per ton, population and the per capita NNP. The poverty ratio is found to be having insignificant correlation with other variables of consumption and hence was omitted from subsequent study. The outcomes of the correlation analysis are utilized for designing rule base for fuzzy inference system (FIS) to forecast the production and consumption of the rice. Subsequently Bayesian technique is used to forecast production and consumption and its results are compared with the results of fuzzy inference analysis.

Originality/value

There are many techniques used for forecasting purpose but FIS and Bayesian technique outperform others. In the present study, the authors therefore focussed on these two techniques. Bayesian technique takes into account the expert opinion at the current conditions whereas FIS uses previously designed rule base. Besides discussing the appropriateness of these two techniques for forecasting production and consumption of rice, their forecasting outcomes will help in logistical and operational planning of the resources at national level, farmers’ level and traders’ level.

Details

International Journal of Productivity and Performance Management, vol. 64 no. 8
Type: Research Article
ISSN: 1741-0401

Keywords

Book part
Publication date: 21 May 2007

Cary Deck and Amy Farmer

Arbitration is often used to settle bargaining disputes. Frequently in such disagreements, one party has better information with respect to the surplus to be allocated. This paper…

Abstract

Arbitration is often used to settle bargaining disputes. Frequently in such disagreements, one party has better information with respect to the surplus to be allocated. This paper considers the impact that the choice of dispute resolution mechanism, conventional or final offer arbitration, has on settlement. This paper shows that theoretically final offer arbitration can systematically favor the informed party by shifting the contract zone towards more profitable allocations while conventional arbitration is theoretically less likely to generate a mutually agreeable settlement. Laboratory results find that the surplus shares are consistent with the predicted favoritism. However, settlement is positively correlated with the width of the contract zone and the data suggest that the location of the contract zone in final offer arbitration generates more disputes.

Details

Aspects of Worker Well-Being
Type: Book
ISBN: 978-1-84950-473-7

Article
Publication date: 14 May 2018

Kuldeep Lamba and Surya Prakash Singh

The purpose of this paper is to identify and analyse the interactions among various enablers which are critical to the success of big data initiatives in operations and supply…

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Abstract

Purpose

The purpose of this paper is to identify and analyse the interactions among various enablers which are critical to the success of big data initiatives in operations and supply chain management (OSCM).

Design/methodology/approach

Fourteen enablers of big data in OSCM have been selected from literature and consequent deliberations with experts from industry. Three different multi criteria decision-making (MCDM) techniques, namely, interpretive structural modeling (ISM), fuzzy total interpretive structural modeling (fuzzy-TISM) and decision-making trial and evaluation laboratory (DEMATEL) have been used to identify driving enablers. Further, common enablers from each technique, their hierarchies and inter-relationships have been established.

Findings

The enabler modelings using ISM, Fuzzy-TISM and DEMATEL shows that the top management commitment, financial support for big data initiatives, big data/data science skills, organizational structure and change management program are the most influential/driving enablers. Across all three different techniques, these five different enablers has been identified as the most promising ones to implement big data in OSCM. On the other hand, interpretability of analysis, big data quality management, data capture and storage and data security and privacy have been commonly identified across all three different modeling techniques as the most dependent big data enablers for OSCM.

Research limitations/implications

The MCDM models of big data enablers have been formulated based on the inputs from few domain experts and may not reflect the opinion of whole practitioners community.

Practical implications

The findings enable the decision makers to appropriately choose the desired and drop undesired enablers in implementing the big data initiatives to improve the performance of OSCM. The most common driving big data enablers can be given high priority over others and can significantly enhance the performance of OSCM.

Originality/value

MCDM-based hierarchical models and causal diagram for big data enablers depicting contextual inter-relationships has been proposed which is a new effort for implementation of big data in OSCM.

Details

The International Journal of Logistics Management, vol. 29 no. 2
Type: Research Article
ISSN: 0957-4093

Keywords

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