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Article
Publication date: 5 May 2022

Defeng Lv, Huawei Wang and Changchang Che

The purpose of this study is to analyze the intelligent semisupervised fault diagnosis method of aeroengine.

Abstract

Purpose

The purpose of this study is to analyze the intelligent semisupervised fault diagnosis method of aeroengine.

Design/methodology/approach

A semisupervised fault diagnosis method based on denoising autoencoder (DAE) and deep belief network (DBN) is proposed for aeroengine. Multiple state parameters of aeroengine with long time series are processed to form high-dimensional fault samples and corresponding fault types are taken as sample labels. DAE is applied for unsupervised learning of fault samples, so as to achieve denoised dimension-reduction features. Subsequently, the extracted features and sample labels are put into DBN for supervised learning. Thus, the semisupervised fault diagnosis of aeroengine can be achieved by the combination of unsupervised learning and supervised learning.

Findings

The JT9D aeroengine data set and simulated aeroengine data set are applied to test the effectiveness of the proposed method. The result shows that the semisupervised fault diagnosis method of aeroengine based on DAE and DBN has great robustness and can maintain high accuracy of fault diagnosis under noise interference. Compared with other traditional models and separate deep learning model, the proposed method also has lower error and higher accuracy of fault diagnosis.

Originality/value

Multiple state parameters with long time series are processed to form high-dimensional fault samples. As a typical unsupervised learning, DAE is used to denoise the fault samples and extract dimension-reduction features for future deep learning. Based on supervised learning, DBN is applied to process the extracted features and fault diagnosis of aeroengine with multiple state parameters can be achieved through the pretraining and reverse fine-tuning of restricted Boltzmann machines.

Details

Aircraft Engineering and Aerospace Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 13 May 2022

Cintia Alves Nogueira, Silvia Inês Dallavalle Pádua and Ronaldo Bernardo

The purpose of this study is to develop a map for the holistic business process management (BPM) diagnosis in order to guide the choice of techniques that encompass all…

Abstract

Purpose

The purpose of this study is to develop a map for the holistic business process management (BPM) diagnosis in order to guide the choice of techniques that encompass all dimensions of the business process.

Design/methodology/approach

The design science research method was used, with the elaboration of seven steps to project solutions to empirical problems: (1) identification of the problem, (2) awareness of the problem, (3) definition of expected results, (4) design and development, (5) demonstration, (6) evaluation of artifacts and (7) communication. These steps were organized in different analyzes: descriptive, experimental and observational. The descriptive analysis comprised steps one to three (identification of the problem, awareness of the problem, definition of expected results) and made use of the systematic literature review procedure for proposing artifacts. The experimental analysis comprised steps four to five (design and development, and demonstration), where the consultation with specialists' procedures and then the Delphi procedure for the construction of the artifacts were carried out. In the observational analysis, steps six (evaluation of artifacts), where two case studies were performed, and step seven (communication), in which the map for the holistic BPM diagnosis was presented were carried out.

Findings

The article systematizes the BPM diagnostic techniques scattered throughout the literature and relates how these techniques relate to dimensions. A map for the holistic BPM diagnosis is generated containing 21 techniques and 9 dimensions, with 45 relationships between these techniques and tools. Another aspect is that the map shows that in BPM promotion projects, techniques are not restricted to any specific phase of the life cycle.

Practical implications

Professionals can use the map to form a blend with selected techniques and use them for holistic BPM diagnosis according to the skills and other resources of the project team.

Originality/value

The map developed is innovative because it relates a set of consolidated techniques for each dimension of the process to provide the holistic diagnosis for the organization. It is important to highlight that these techniques and dimensions were scattered in the literature.

Details

Business Process Management Journal, vol. 28 no. 3
Type: Research Article
ISSN: 1463-7154

Keywords

Article
Publication date: 16 August 2013

Philip Thomas, Patience Seebohm, Jan Wallcraft, Jayasree Kalathil and Suman Fernando

The purpose of this survey was to describe the impact of the diagnosis of schizophrenia on the lives of people who receive the diagnosis.

1225

Abstract

Purpose

The purpose of this survey was to describe the impact of the diagnosis of schizophrenia on the lives of people who receive the diagnosis.

Design/methodology/approach

The authors designed a questionnaire to investigate attitudes to and experiences of the diagnosis of schizophrenia. After a pilot study, they made the questionnaire available online and, through a network of service user and other organisations, solicited responses.

Findings

Of the 470 responses, 27.4 per cent were from service users. Content analysis of their responses revealed three main categories: concern with the consequences of the diagnosis and its negative impact on their lives, the life contexts of individuals before receiving the diagnosis, and concerns with medication and treatment. This paper deals with the first two.

Research limitations/implications

It is impossible to generalise the results of this survey because respondents self‐selected, and thus might be expected to have strong feelings against (or for) the diagnosis of schizophrenia.

Practical implications

The diagnosis of schizophrenia in this sample had devastating negative implications. It was experienced as harmful and stigmatising. Very few people understood their experiences as a biomedical disorder.

Social implications

A gulf exists between the experiences of people diagnosed with schizophrenia and the concerns of academics and others currently involved in debates about the merits of different systems of diagnosis.

Originality/value

This survey is valuable because it draws attention to experiences of diagnosis that are easily lost in the storm of academic controversies about diagnosis in psychiatry.

Details

Mental Health and Social Inclusion, vol. 17 no. 3
Type: Research Article
ISSN: 2042-8308

Keywords

Article
Publication date: 1 August 2008

Liz Hughes and Cheryl Kipping

This paper aims to provide an overview of the policy guidance and will begin with an introduction and overview of policy development during this period; then focus on the…

246

Abstract

This paper aims to provide an overview of the policy guidance and will begin with an introduction and overview of policy development during this period; then focus on the more specific guidance in four broad areas: dual diagnosis specific guidance, risk, training, and service specific ‐ guidance. Assessment and treatment are cross‐cutting themes and key messages in relation to these areas will also be highlighted. Having outlined the policy guidance, consideration will be given to how effective it has been in changing service delivery and suggestions made as to what might be required to ensure more consistent implementation.

Details

Advances in Dual Diagnosis, vol. 1 no. 1
Type: Research Article
ISSN: 1757-0972

Keywords

Article
Publication date: 7 September 2012

John Tully, Diana Schirliu and Maria Moran

The Diagnostic Criteria for Psychiatric Disorders for Use with Adults with Learning Disabilities/Mental Retardation (DC‐LD) was introduced in 2003 in an attempt to improve…

337

Abstract

Purpose

The Diagnostic Criteria for Psychiatric Disorders for Use with Adults with Learning Disabilities/Mental Retardation (DC‐LD) was introduced in 2003 in an attempt to improve accuracy of diagnosis in the intellectual disability population. The paper aims to apply this system to a sample of a population with intellectual disability to further investigate its usefulness in the clinical setting.

Design/methodology/approach

A sample of 50 patients within an intellectual disability service was identified. Each individual was interviewed by a registrar in psychiatry of intellectual disability in the presence of their key worker or a carer that knew the individual well. Chart notes were extensively reviewed for clearly documented history of psychiatric symptoms and behavioural difficulties. The information gathered was applied as per the DC‐LD criteria to identify appropriate diagnoses. Previously documented diagnoses were also recorded for comparison purposes.

Findings

There was considerable discrepancy between the rates of psychiatric diagnoses after application of DC‐LD and rates of previously documented diagnoses within the sample. Use of DC‐LD led to the reclassification of many previously documented diagnoses, mainly as behavioural disorders. There were also discrepancies between rates of diagnosis of pervasive developmental disorders and Alzheimer's disease before and after use of DC‐LD.

Originality/value

This study adds to the evidence regarding the usefulness of DC‐LD in the intellectual disability population and also highlights the shortcomings of non‐systematic methods of diagnosis. It was agreed that DC‐LD criteria be applied to all service users in this population in the future.

Details

Advances in Mental Health and Intellectual Disabilities, vol. 6 no. 5
Type: Research Article
ISSN: 2044-1282

Keywords

Book part
Publication date: 3 August 2011

Karl Bryant

Purpose – The purpose of this chapter is to theorize the relationship between diagnosis and medicalization through an examination of the medicalization of childhood gender…

Abstract

Purpose – The purpose of this chapter is to theorize the relationship between diagnosis and medicalization through an examination of the medicalization of childhood gender variance and the Gender Identity Disorder of Childhood diagnosis.

Methodology/approach – The chapter examines textual data (published clinical and research literatures, and critiques of the diagnosis appearing in a range of venues) to track how childhood gender variance is medicalized over time and the role of diagnosis in that medicalization.

Findings – While diagnosis certainly plays a role in shoring up medicalization, this case study reveals the many ways in which diagnoses may also become key tools in attempts to curtail medicalization.

Research limitations/implications – As a case study, the findings are not generalizable to all diagnoses. As a study of an instance of the medicalization of deviance, these findings may be particularly applicable to analogous cases.

Social implications – These findings show the sometimes tenuous nature of medicalization processes, and the social uses of diagnoses in those processes.

Originality/value of paper – This chapter sheds light on a relationship that is often assumed to be unidirectional (e.g., that the formation of diagnosis results in increased medicalization), and answers calls for a more nuanced sociology of diagnosis, including greater attention to the relationship between diagnosis and medicalization.

Details

Sociology of Diagnosis
Type: Book
ISBN: 978-0-85724-575-5

Keywords

Book part
Publication date: 3 August 2011

Mary C. Burke

Purpose – To examine debates within the transgender rights movement over the GID diagnosis in order to demonstrate how diagnosis can be resisted as a source of stigma and…

Abstract

Purpose – To examine debates within the transgender rights movement over the GID diagnosis in order to demonstrate how diagnosis can be resisted as a source of stigma and social control at the same time that it is embraced as a means of legitimating experience and gaining access to resources, including medical services.

Methodology/approach – This chapter draws on qualitative data from: in-depth interviews with transgender rights activists and advocates, participant observation in transgender health care and activism settings, and content analysis of print and web-based materials on transgender health.

Findings – Transgender rights activists and advocates overwhelmingly reject the pathologization of gender variance. However, some actors advocate complete demedicalization, while others advocate diagnostic reform. Actors' advocacy for each position is influenced by the perceived costs versus benefits of diagnosis.

Social implications – The findings of this research shed light on the multiple and often contradictory effects of diagnosis. Diagnoses can both normalize and stigmatize. They can function to allow or deny access to medical services and they can support or act as barriers to legal rights and protections. Understanding these contradictory effects is essential to understanding contests over diagnosis, including the contemporary debate over GID.

Originality/value of paper – Through examination of an intra-constituent contest over diagnosis, this research demonstrates the need to distinguish medicalization from pathologization and illustrates the importance of examining the multiple and contradictory effects of diagnosis, both in and outside of medical settings.

Details

Sociology of Diagnosis
Type: Book
ISBN: 978-0-85724-575-5

Keywords

Book part
Publication date: 11 July 2019

Zornitza Kambourova, Wolter Hassink and Adriaan Kalwij

An adverse health event can affect women’s work capacity as they need time to recover. The institutional framework in the Netherlands provides employment protection during…

Abstract

An adverse health event can affect women’s work capacity as they need time to recover. The institutional framework in the Netherlands provides employment protection during the first two years after the diagnosis. In this study, we have assessed the extent to which women’s employment is affected in the short- and long term by an adverse health event. We have used administrative Dutch data which follow women aged 25 to 55 years for four years after a medical diagnosis. We found that diagnosed women start leaving employment during the protection period and four years later they were about one percentage point less likely to be employed. Women in permanent employment did not reduce their employment during the protection period and reduced their employment with less than 0.5 percentage points thereafter. Furthermore, we found minor adjustments in the working hours in the short term and no adjustments in the long term. Lastly, we found that for wages, and not for employment and hours, adjustments could be related to the severity of the health condition: women diagnosed with temporary health conditions experienced a short-term wage penalty of about 0.5–1.7 percent and those diagnosed with chronic and incapacitating conditions experienced a long-term wage penalty of about 0.5 percent, while women diagnosed with some chronic and nonincapacitating conditions, such as respiratory conditions, experienced no wage changes in the short or long term.

Book part
Publication date: 3 August 2011

Jennifer S. Singh

Purpose – This chapter discusses the proposed changes in the Diagnostic and Statistical Manual of Mental Disorders (DSM-V), which eliminates Asperger's disorder (AD) and…

Abstract

Purpose – This chapter discusses the proposed changes in the Diagnostic and Statistical Manual of Mental Disorders (DSM-V), which eliminates Asperger's disorder (AD) and replaces it as “autism spectrum disorder.” Implications of these changes on the identity of adults with AD and the influence of everyday life experiences will be addressed.

Methodology/approach – This research is based on 19 interviews with adults diagnosed or self-diagnosed with AD. Central themes surrounding issues of identity and everyday life experiences were determined using grounded theory approaches.

Findings – This study demonstrates how the diagnosis and self-diagnosis of AD is fused with individual identity. It also shows how Asperger identity is positively embraced. The proposed changes to eliminate AD in DSM-V threaten these assertions of Asperger identity, which could potentially enhance stigma experienced by people with AD. Regardless of its removal, Asperger identity must be considered within the broader context of people's everyday lives and how experiences in social interaction and communication can be strong agents of identity construction.

Social implications – The proposed changes to eliminate AD in DSM-V is a social issue that will impact individuals with Asperger's and their families, as well as health-care professionals, health insurers, researchers, state agencies, and educational providers.

Originality/value of paper – This chapter offers a unique insight into identity construction based on the diagnosis and self-diagnosis of AD.

Book part
Publication date: 13 October 2014

Jessica Streeter

I discuss the formal attention deficit hyperactivity disorder (ADHD) diagnosis process and whether the Black–White differences found in this process are the results of…

Abstract

Purpose

I discuss the formal attention deficit hyperactivity disorder (ADHD) diagnosis process and whether the Black–White differences found in this process are the results of unmet needs or conscious decisions.

Design

First, I offer a new analytic framework for understanding the “ADHD process.” The proposed framework breaks ADHD diagnoses down into three stages: the informal diagnosis, the formal diagnosis, and treatment. This approach reveals certain racial trends in the ADHD literature. Second, I use the 2007 National Health Interview Survey (total n = 75,764) to address racial differences.

Findings

I find that blacks are less likely to hold a formal ADHD diagnosis than whites. Third, nested logistic models reveal that this racial difference is not explained by health insurance status, family income, or family educational level. New explanatory models for the black–white difference in ADHD should stray from a strict reliance on the “unmet need” discourse, and instead focus on other factors that may affect the decision-making process in diverse families.

Value

This chapter makes three contributions to the wider literature on ADHD and race.

Details

Family Relationships and Familial Responses to Health Issues
Type: Book
ISBN: 978-1-78441-015-5

Keywords

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