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Article
Publication date: 10 February 2022

Djazia Khelil, Slimane Bouazabia and Pantelis N. Mikropoulos

The paper aims to estimate the instantaneous breakdown voltage of the lightning discharge from simulated figures in an energized rod-plane configuration protected by a…

Abstract

Purpose

The paper aims to estimate the instantaneous breakdown voltage of the lightning discharge from simulated figures in an energized rod-plane configuration protected by a lightning rod. The same configuration of electrodes has been the subject of experimental investigations for the measurement of the instantaneous breakdown voltage using oscillographic monitoring. This study validates the simulation model by making a comparison with experimentation and involves the role of the inception field of the upward discharge in the propagation of this last one.

Design/methodology/approach

The research methodology is based on the development of a fractal lightning protection model based on real physical conditions of the discharge propagation, such as the downward discharge and the upward one emanating from protection. The voltage drop and the randomness character of the lightning discharge are also taken into account. The electrical field is an important parameter in discharge development; it is considered in this work at each step of the discharge propagation by the finite element method. The instantaneous breakdown voltage is measured and estimated by both empirical equations and simulated figures of lightning discharge

Findings

The established model that allows estimating the instantaneous breakdown voltage from simulated discharges and empirical equations gives results in a good agreement with experimentation. The involvement of the upward discharge inception field emanating from the lightning rod in the evolution of electrical discharge is illustrated.

Practical implications

The work presented in this paper aims to develop a new fractal lightning protection model taking into consideration physical phenomena intervening in the development of the lightning discharge.

Originality/value

The originality of this work consists of the combination between fractals modelling of the electrical discharge and the protection against lightning, in addition, to use one of the characteristics of the electrical discharge, which is the instantaneous breakdown voltage, to prove the importance of the inception field emanating from the upward discharge in the propagation criterion of this last one.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 24 May 2022

Arezoo Monfared, Nahid Dehghan Nayeri, Nazila Javadi-Pashaki and Fateme Jafaraghaee

This study aimed to analyze and define the concept of readiness for hospital discharge (RHD) in patients with myocardial infarction (MI).

Abstract

Purpose

This study aimed to analyze and define the concept of readiness for hospital discharge (RHD) in patients with myocardial infarction (MI).

Design/methodology/approach

Walker and Avant's approach was used for concept analysis. Electronic text searches were performed using valid databases with “readiness for hospital discharge” and “MI” keywords. The research included quantitative and qualitative studies related to RHD published between 1997 and 2021 in English and Persian. Out of 103 obtained articles, 29 met the inclusion criteria.

Findings

In the analysis, the authors identified stable physical state, desirable individual and social conditions, psychological stability, adequate support, adequate information and knowledge, and multidisciplinary care as the attributes of the determinants of RHD. Antecedents were divided into two categories, including preadmission conditions (economic and social, etc.) and postadmission conditions (disease severity and patient health needs, etc). The consequences were also identified as both positive (e.g. self-care) and side effects (e.g. reduced readmission).

Originality/value

The results showed that the concept of RHD in MI patients is a complex and multidimensional condition that applies to all patients on discharge. It is critical for the care team to pay attention to its attributes and scopes in the process of preparing the patient for discharge. It is also suggested that the concept be used as a nursing diagnosis on the North American Nursing Diagnosis Association (NANDA) list. The Association provides nurses with an up-to-date list of nursing diagnoses.

Details

Qualitative Research Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1443-9883

Keywords

Article
Publication date: 1 June 2010

Lesley Wade

This article reports on the experiences and evaluations of piloting health and social care discharge co‐ordinators in acute and community hospital settings. Benefits were…

Abstract

This article reports on the experiences and evaluations of piloting health and social care discharge co‐ordinators in acute and community hospital settings. Benefits were felt with regard to length of stay, bed day use, and patient and staff experience, and were particularly notable where a discharge co‐ordinator employed by the community trust was put into the acute hospital setting. The pilots have supported a redesign of hospital discharge processes across Torbay Care Trust and South Devon Healthcare NHS Foundation Trust, and provided the foundation for improved partnership working and integrated service provision.

Details

Journal of Integrated Care, vol. 18 no. 3
Type: Research Article
ISSN: 1476-9018

Keywords

Article
Publication date: 1 April 2022

Wei Cai, Min Bai and Howard Davey

The purpose of this study is to better understand the nexus between environmental taxes and other environmental management systems (EMSs) and to propose an alternative…

Abstract

Purpose

The purpose of this study is to better understand the nexus between environmental taxes and other environmental management systems (EMSs) and to propose an alternative framework for implementing environmental protection tax (EPT) in China.

Design/methodology/approach

The study uses a multimethod approach encompassing document analysis and comparative analysis. The archival data covers laws, reports, regulations, guidelines and standards related to the EPT and EMS sub-systems in China.

Findings

The study identifies several institutional features of environmental taxes that have not been fully explored in past tax research. In addition, the study reveals that information-sharing mechanisms are key to addressing the risks and uncertainties associated with the implementation of an environmental tax and that the mechanisms are grounded in the nexus among EPT and two EMS sub-systems.

Research limitations/implications

The findings of this study have implications for the understanding of China’s environmental tax system, the Environmental Impact Assessment system and the pollutants discharge permit (PDP) system. The construction of an alternative framework provides insights for approaches to environmental taxation. A limitation of this study is that the application of the framework might be undermined by the inaccurate manual sampling, as some pollutants may be non-replicable.

Practical implications

The findings of this study are relevant to policymakers who are designing, improving or abandoning environmental taxes for alternate solutions to environmental issues.

Social implications

The insights gained from this study may be of assistance to lower the risks and uncertainties associated with the implementation of an environmental tax.

Originality/value

The study contributes to approaches to environmental taxes by constructing an alternative framework that connects an environmental tax system with two EMSs. The framework lays the groundwork for some promising research opportunities. Additionally, the study extends the tax accounting literature (Hanlon and Heitzman, 2010) by connecting accounting and environmental knowledge and developing a transdisciplinary approach. The study also contributes to the emerging body of literature that addresses the challenges in implementing environmental taxes in China.

Abstract

Details

Transportation and Traffic Theory in the 21st Century
Type: Book
ISBN: 978-0-080-43926-6

Article
Publication date: 19 August 2021

Sara A. Kreindler, Stephanie Hastings, Sara Mallinson, Meaghan Brierley, Arden Birney, Rima Tarraf, Shannon Winters, Keir Johnson, Leah Nicholson, Mohammed Rashidul Anwar and Zaid Aboud

Interventions to hasten patient discharge continue to proliferate despite evidence that they may be achieving diminishing returns. To better understand what such…

Abstract

Purpose

Interventions to hasten patient discharge continue to proliferate despite evidence that they may be achieving diminishing returns. To better understand what such interventions can be expected to accomplish, the authors aim to critically examine their underlying program theory.

Design/methodology/approach

Within a broader study on patient flow, spanning 10 jurisdictions across Western Canada, the authors conducted in-depth interviews with 300 senior, middle and frontline managers; 174 discussed discharge initiatives. Using thematic analysis informed by a Realistic Evaluation lens, the authors identified the mechanisms by which discharge activities were believed to produce their impacts and the strategies and context factors necessary to trigger the intended mechanisms.

Findings

Managers' accounts suggested a common program theory that applied to a wide variety of discharge initiatives. The chief mechanism was inculcation of a sharp focus on discharge; reinforcing mechanisms included development of shared understanding and a sense of accountability. Participants reported that these mechanisms were difficult to produce and sustain, requiring continual active management and repeated (re)introduction of interventions. This reflected a context in which providers, already overwhelmed with competing demands, were unlikely to be able (or perhaps even willing) to sustain a focus on this particular aspect of care.

Originality/value

The finding that “discharge focus” emerged as the core mechanism of discharge interventions helps to explain why such initiatives may be achieving limited benefit. There is a need for interventions that promote timely discharge without relying on this highly problematic mechanism.

Details

Journal of Health Organization and Management, vol. 36 no. 2
Type: Research Article
ISSN: 1477-7266

Keywords

Article
Publication date: 3 September 2021

Line Maria Simonsen and Sune Vork Steffensen

The purpose of this study is to gain insight into the interaction-sensitive skills medical practitioners enact as they manage multiple organizational factors in the…

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Abstract

Purpose

The purpose of this study is to gain insight into the interaction-sensitive skills medical practitioners enact as they manage multiple organizational factors in the context of discharging patients.

Design/methodology/approach

For that purpose, we carried out a cognitive ethnographic study in a Danish hospital, where we video-recorded three pre-ward round meetings, five discharge conversations and conducted seven semi-structured interviews. Fieldnotes and interview transcripts were analyzed using the method Cognitive Task Analysis, and video-recordings were analyzed via the interactivity-based approach Cognitive Event Analysis.

Findings

Our findings show that practitioners coordinate multi-scalar resources (e.g. verbal patterns and cognitive artifacts) in order to discharge patients in a safe and integrated way, which we propose amounts to the social and intercorporeal ability to align simultaneously emerging factors, like organizational procedures in the hospital, artifacts in use, sociocultural resources and the individual medical expertise of the practitioner in the emerging social interaction with the patient. In pursing this claim, we investigate the linguistic and cognitive processes emerging in a single case study of a nurse who discharges a patient. We propose that the interaction-sensitive skill which enables the nurse to solve the task of discharging the patient can be characterized via hybrid cognition.

Originality/value

Thus, the value of the article is dual: On the one hand, it empirically contributes with knowledge of the complex organizational structures that constrains micro-level medical interactions in discharges, and on the other, the article contributes theoretically with a hybrid cognitive framework that allows organizational researchers to understand and assess complex cognitive and linguistic processes that goes into the social micro-coordination in complex organizational-medical task.

Details

International Journal of Organization Theory & Behavior, vol. 24 no. 3
Type: Research Article
ISSN: 1093-4537

Keywords

Article
Publication date: 27 May 2021

Wenchao Zhang

This paper aims to study the breakdown, oscillation and vanishing of the discharge channel and its influence on crater formation with simulation and experimental methods…

Abstract

Purpose

This paper aims to study the breakdown, oscillation and vanishing of the discharge channel and its influence on crater formation with simulation and experimental methods. The experiment results verified the effect of the oscillating characteristics of the discharge channel on the shape of the crater.

Design/methodology/approach

A mathematical model that considers the magnetohydrodynamics (MHD) and the discharge channel oscillation was established. The micro process of discharging based on magnetic-fluid coupling during electrical discharge machining (EDM) was simulated. The breakdown, oscillation and vanishing stage of the discharge channel were analyzed, and the crater after machining was obtained. Finally, a single-pulse discharge experiment during EDM was conducted to verify the simulation model.

Findings

During the breakdown of the discharge channel, the electrons move towards the center of the discharge channel. The electrons at the end diverge due to the action of water resistance, making the discharge channel appear wide at both ends and narrow in the middle, showing the pinch effect. Due to the mutual attraction of electrons and positive ions in the channel, the transverse oscillation of the discharge channel is shown on the micro level. Therefore, the position of the discharge point on the workpiece changes. The longitudinal oscillation in the discharge channel causes the molten pool on the workpiece to be ejected due to the changing pressure. The experimental results show that the shape of the crater is similar to that in the simulation, which verifies the correctness of the simulation results and also proves that the crater generated by the single pulse discharge is essentially the result of the interaction between transverse wave and longitudinal wave.

Originality/value

In this paper, the simulation of the discharge breakdown process in EDM was carried out, and a new mathematical model that considers the MHD and the discharge channel oscillation was established. Based on the MHD module, the discharge breakdown, oscillation and vanishing stages were simulated, and the velocity field and pressure field in the discharge area were obtained.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 4
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 10 May 2021

Nyree J. Taylor, Reeva Lederman, Rachelle Bosua and Marcello La Rosa

Capture, consumption and use of person-centred information presents challenges for hospitals when operating within the scope of limited resources and the push for…

Abstract

Purpose

Capture, consumption and use of person-centred information presents challenges for hospitals when operating within the scope of limited resources and the push for organisational routines and efficiencies. This paper explores these challenges for patients with Acute Coronary Syndrome (ACS) and the examination of information that supports successful hospital discharge. It aims to determine how the likelihood of readmission may be prevented through the capturing of rich, person-specific information during in-patient care to improve the process for discharge to home.

Design/methodology/approach

The authors combine four research data collection and analysis techniques: one, an analysis of the patient record; two, semi-structured longitudinal interviews; three, an analysis of the patient's journey using process mining to provide analytics about the discharge process, and four, a focus group with nurses to validate and confirm our findings.

Findings

The authors’ contribution is to show that information systems which support discharge need to consider models focused on individual patient stressors. The authors find that current discharge information capture does not provide the required person-centred information to support a successful discharge. Data indicate that rich, detailed information about the person acquired through additional nursing assessments are required to complement data provided about the patient's journey in order to support the patients’ post-discharge recovery at home.

Originality/value

Prior research has focused on information collection constrained by pre-determined limitations and barriers of system design. This work has not considered the information provided by multiple sources during the whole patient journey as a mechanism to reshape the discharge process to become more person-centred. Using a novel combination of research techniques and theory, the authors have shown that patient information collected through multiple channels across the patient care journey may significantly extend the quality of patient care beyond hospital discharge. Although not assessed in this study, rich, person-centred discharge information may also decrease the likelihood of patient readmission.

Details

Information Technology & People, vol. 34 no. 6
Type: Research Article
ISSN: 0959-3845

Keywords

Article
Publication date: 28 August 2020

Ba-Phu Nguyen, Ananta Man Singh Pradhan, Tan Hung Nguyen, Nhat-Phi Doan, Van-Quang Nguyen and Thanh-Canh Huynh

The consolidation behavior of prefabricated vertical drain (PVD)-installed soft deposits mainly depends on the PVD performance. The purpose of this study is to propose a…

Abstract

Purpose

The consolidation behavior of prefabricated vertical drain (PVD)-installed soft deposits mainly depends on the PVD performance. The purpose of this study is to propose a numerical solution for the consolidation of PVD-installed soft soil using the large-strain theory, in which the reduction of discharge capacity of PVD according to depth and time is simultaneously considered.

Design/methodology/approach

The proposed solution also takes into account the general constitute relationship of soft soil. Subsequently, the proposed solution is applied to analyze and compare with the monitoring data of two cases, one is the experimental test and another is the test embankment in Saga airport.

Findings

The results show that the reduction of PVD discharge capacity according to depth and time increased the duration required to achieve a certain degree of consolidation. The consolidation rate is more sensitive to the reduction of PVD discharge capacity according to time than that according to the depth. The effects of the reduction of PVD discharge capacity according to depth are more evident when PVD discharge capacity decreases. The predicted results using the proposed numerical solution were validated well with the monitoring data for both cases in verification.

Research limitations/implications

In this study, the variation of PVD discharge capacity is only considered in one-dimensional consolidation. However, it is challenging to implement a general expression for discharge capacity variation according to time in the two-dimensional numerical solution (two-dimensional plane strain model). This is the motivation for further study.

Practical implications

A geotechnical engineer could use the proposed numerical solution to predict the consolidation behavior of the drainage-improved soft deposit considering the PVD discharge capacity variation.

Originality/value

The large-strain consolidation of PVD-installed soft deposits could be predicted well by using the proposed numerical solution considering the PVD discharge capacity variations according to depth and time.

Details

Engineering Computations, vol. 38 no. 4
Type: Research Article
ISSN: 0264-4401

Keywords

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