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Article
Publication date: 10 June 2019

Alexis A. Adams-Clark, Marina N. Rosenthal and Jennifer J. Freyd

Although prior research has indicated that posttraumatic stress symptoms may result from sex-based harassment, limited research has targeted a key posttraumatic outcome …

Abstract

Purpose

Although prior research has indicated that posttraumatic stress symptoms may result from sex-based harassment, limited research has targeted a key posttraumatic outcome – dissociation. Dissociation has been linked to experiences of betrayal trauma and institutional betrayal; sex-based harassment is very often a significant betrayal creating a bind for the target. The purpose of this paper is to extend existing research by investigating the relationship between sex-based harassment, general dissociation, sexual dissociation and sexual communication.

Design/methodology/approach

This exploratory study utilized self-report measures from a sample of male and female Oregon residents using Amazon Mechanical Turk (N=582).

Findings

Results of regression analyses indicated that harassment statistically predicted higher general dissociation, higher sexual dissociation and less effective sexual communication, even after controlling for prior sexual trauma experiences. Results did not indicate any significant interactions between gender and harassment.

Practical implications

When considering the effects of sex-based harassment on women and men, clinicians and institutional organizations should consider the role of dissociation as a possible coping mechanism for harassment.

Originality/value

These correlational findings provide evidence that sex-based harassment is uniquely associated with multiple negative psychological outcomes in men and women.

Details

Equality, Diversity and Inclusion: An International Journal, vol. 39 no. 1
Type: Research Article
ISSN: 2040-7149

Keywords

Article
Publication date: 17 May 2021

Akash K. Gupta, Rahul Yadav, Malay K. Das and Pradipta K. Panigrahi

This paper aims to present the implementation of a multi-layer radiation propagation model in simulations of multi-phase flow and heat transfer, for a dissociating methane hydrate…

Abstract

Purpose

This paper aims to present the implementation of a multi-layer radiation propagation model in simulations of multi-phase flow and heat transfer, for a dissociating methane hydrate reservoir subjected to microwave heating.

Design/methodology/approach

To model the induced heterogeneity due to dissociation of hydrates in the reservoir, a multiple homogeneous layer approach, used in food processes modelling, is suggested. The multi-layer model is incorporated in an in-house, multi-phase, multi-component hydrate dissociation simulator based on the finite volume method. The modified simulator is validated with standard experimental results in the literature and subsequently applied to a hydrate reservoir to study the effect of water content and sand dielectric nature on radiation propagation and hydrate dissociation.

Findings

The comparison of the multi-layer model with experimental results show a maximum difference in temperature estimation to be less than 2.5 K. For reservoir scale simulations, three homogeneous layers are observed to be sufficient to model the induced heterogeneity. There is a significant contribution of dielectric properties of sediments and water content of the reservoir in microwave radiation attenuation and overall hydrate dissociation. A high saturation reservoir may not always provide high gas recovery by dissociation of hydrates in the case of microwave heating.

Originality/value

The multi-layer approach to model microwave radiation propagation is introduced and tested for the first time in dissociating hydrate reservoirs. The multi-layer model provides better control over reservoir heterogeneity and interface conditions compared to existing homogeneous models.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 32 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 1 August 2023

Li Zhang, Bisheng Wu and Haitao Zhang

Natural gas hydrate (NGH) has been regarded as one of the most important resources due to NGH's large amounts of reserve. However, NGH development still faces many technical…

Abstract

Purpose

Natural gas hydrate (NGH) has been regarded as one of the most important resources due to NGH's large amounts of reserve. However, NGH development still faces many technical challenges, such as low production rate and reservoir instability resulting from NGH decomposition. Therefore, developing a fully coupled THMC model for simulating the hydrate decomposition and studying its mechanical behavior is very important and necessary. The purpose of this article is to develop and solve a multi-phase, strong nonlinearity and large-scale fully coupled thermal-hydro-mechanical–chemical (THMC) model for simulating the multi-physics processes involving solid-liquid-gas flow, heat transfer, NGH phase change and rock deformation during NGH decomposition.

Design/methodology/approach

In this paper, a multi-phase, strong nonlinearity and large-scale fully coupled THMC model is developed for simulating the multi-physics processes involving solid-liquid-gas flow, heat transfer, NGH phase change and rock deformation during NGH dissociation. The fully coupled THMC model is solved by using a fully implicit finite element method, in which the gas pressure, water pressure, temperature and displacement are taken as basic unknown variables. The proposed model is validated against with the experimental data, showing high accuracy and reliability.

Findings

A multi-phase, strong nonlinearity and large-scale fully coupled THMC model is developed for simulating the multi-physics processes involving solid-liquid-gas flow, heat transfer, NGH phase change and rock deformation during NGH decomposition. The proposed model is validated against with the experimental data, showing high accuracy and reliability.

Research limitations/implications

Some assumptions are made to make the model tractable, including (1) the composition gas of hydrate is pure methane; (2) the gas-liquid multi-phase flow in the pore obeys Darcy's law; (3) hydrate occurs on the surface of soil particles, both of them form the composite consolidation material; (4) the small-strain assumption is applied to composite solid materials, which are treated as skeletons and cannot be moved; (5) momentum change caused by phase change is not considered.

Practical implications

NGH has been regarded as one of the most important resources due to its large amounts of reserve. However, NGH development still faces many technical challenges, such as low production rate and reservoir instability resulting from NGH decomposition. Most of the existing studies decouple the process with solid deformation and seepage behavior, but the accuracy of the numerical results will be sacrificed to certain extent. Therefore, it is very important and necessary to develop a fully coupled THMC model for simulating the hydrate decomposition and studying its mechanical behavior.

Social implications

NGH, widely distributed in shallow seabed or permanent frozen region, has the characteristics of high energy density and high combustion efficiency (Yan et al., 2020). A total of around 7.5 × 1,018 m3 has been proved to exist around the world and 1 m3 of NGH can release about 160–180 m3 of natural gas (Kvenvolden and Lorenson) under normal conditions. Safely and sustainably extracting NGH commercially can effectively relieve global energy pressure and contribute to achieving carbon reduction goals.

Originality/value

The novelty of the present work lies in mainly two aspects. First, a fully coupled THMC model is developed for studying the multi-physics processes involving solid-liquid-gas flow, heat transfer, NGH phase change and solid deformation during NGH dissociation. Second, the numerical solution is obtained by using a fully implicit finite element method (FEM) and is validated against experimental data.

Details

Engineering Computations, vol. 40 no. 6
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 1 February 1996

Alejandro B. Engel, Eduardo Massad and Petronio Pulino

Proposes a modified Hill model for the oxyhaemoglobin dissociation curve. The model fits normal oxyhaemoglobin dissociation experimental data quite accurately, and can easily be…

Abstract

Proposes a modified Hill model for the oxyhaemoglobin dissociation curve. The model fits normal oxyhaemoglobin dissociation experimental data quite accurately, and can easily be adapted to experimental data of subjects suffering haemoglobinopathies when available. Discusses the Adair equation, as well as correcting factors for varying temperature and pH.

Details

Kybernetes, vol. 25 no. 1
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 1 May 1946

P. Bielkowicz

WHEN the temperature of the gas reaches the high level, the molecules begin to break up into atoms or groups of atoms, which after recombination form new and smaller molecules of…

Abstract

WHEN the temperature of the gas reaches the high level, the molecules begin to break up into atoms or groups of atoms, which after recombination form new and smaller molecules of a simpler structure. For instance, tri‐atomic molecules after having been split form diatomic ones. This process is called the dissociation of gases. The newly‐formed molecules, when colliding, again form molecules of the original gas, so two processes are occurring simultaneously. However, the higher the temperature, the larger the percentage of dissociated molecules.

Details

Aircraft Engineering and Aerospace Technology, vol. 18 no. 5
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 13 March 2017

Sarah L. Parry and Mike Lloyd

The term dissociation can describe a coping strategy to protect oneself against something unwanted in the moment, a disconnection from sensations and experiences in the here and…

Abstract

Purpose

The term dissociation can describe a coping strategy to protect oneself against something unwanted in the moment, a disconnection from sensations and experiences in the here and now. Although the more severe experiences of dissociation have been the subject of intense study over the last two decades, much less has been written about clients commonly seen in mental health services with mild to moderate dissociative conditions. Specifically, the purpose of this paper is to attend to therapeutic work with a client who experienced moderate dissociation, which caused disruptions to her autobiographical narrative and sense-of-self.

Design/methodology/approach

This single case design details the therapeutic journey of a Caucasian woman in her early 40s, who experienced moderate dissociation. The report illustrates how the process of creative artwork formulation helped address unwanted dissociative experiences whilst enhancing other coping strategies.

Findings

The client’s personal resources combined with a creative and responsive approach to formulation and reformulation facilitated the process of reconnecting with herself and others through developing awareness of her strengths and past means of coping, finally developing a consistent self-narrative.

Practical implications

The experiences of a creative approach to formulation are discussed in relation to the client’s past traumas and case relevant theory. These preliminary findings suggest creative artwork formulation is an effective tool in terms of developing trust and shared understanding within the therapeutic relationship and meaning making processes throughout therapy.

Originality/value

This case study presents an account of creative artwork formulation used as a method of formulation and reformulation specifically with a client experiencing moderate dissociative experiences following interpersonal traumas. Further, the report discusses the ways in which creative artwork formulation facilitated memory exploration and integration, as well as containing meaning making and healing.

Book part
Publication date: 11 June 2021

Christy M. K. Cheung, Dimple R. Thadani and Zach W. Y. Lee

With growing interest in the uses of hedonic technologies and gamification in system design, the concept of cognitive absorption (CA) has become increasingly salient in the…

Abstract

With growing interest in the uses of hedonic technologies and gamification in system design, the concept of cognitive absorption (CA) has become increasingly salient in the information systems literature. However, little effort has been made to evaluate the research status and consolidate the current literature findings. To fill these research gaps, the authors conducted a literature review on CA. The authors then proposed an integrative framework that summarises the key elements of and variables related to CA and their relationships. The major findings of the study are discussed, and an agenda for future research is proposed.

Details

Information Technology in Organisations and Societies: Multidisciplinary Perspectives from AI to Technostress
Type: Book
ISBN: 978-1-83909-812-3

Keywords

Article
Publication date: 20 May 2022

Nirmal Acharya, Anne-Marie Sassenberg and Jeffrey Soar

The applications of artificial intelligence (AI), natural language processing and machine learning in e-commerce are growing. Recommender systems (RSs) are interaction-based…

Abstract

Purpose

The applications of artificial intelligence (AI), natural language processing and machine learning in e-commerce are growing. Recommender systems (RSs) are interaction-based technologies based on AI that can offer recommendations for products for use or of interest to a potential consumer. Curiosity, focused immersion and temporal dissociation are often treated as the dimensions of cognitive absorption, so exploring them separately can provide valuable insights into their dynamics. The paper aims to determine the effect of the cognitive absorption dimensions namely focused immersion, temporal dissociation and curiosity independently on RSs continuous use intention.

Design/methodology/approach

A quantitative research design was used to explore the effect of dimensions of cognitive absorption on AI-driven RSs continuous use intention in e-commerce. Data were gathered from 452 active users of Amazon through an online cross-sectional survey and were analysed using partial least squares structural equation modelling.

Findings

The findings indicated that curiosity and focused immersion directly affect RSs continuous use intention, but temporal dissociation does not affect RSs continuous use intention.

Originality/value

The current research focused on Amazon’s RSs that use AI and machine learning techniques. The research aimed to empirically explore the effects of the dimensions of cognitive absorption separately on AI-driven RSs continuous use intention in e-commerce. This research may be of interest to executives working in both public and private industries to better harness the potential of recommendations driven by AI to maximize RSs’ reuse and to enhance customer loyalty.

Article
Publication date: 1 January 1947

P. Bielkowicz

A GENERAL outline of the processes occurring in the working fluid of a rocket engine has been summarized previously, but the total picture is still far from complete, a number of…

49

Abstract

A GENERAL outline of the processes occurring in the working fluid of a rocket engine has been summarized previously, but the total picture is still far from complete, a number of important phenomena not having been taken into account. Their full analysis would be, however, beyond the scope of this paper, and may be left to specialists more qualified than the author to give an account of combustion processes.

Details

Aircraft Engineering and Aerospace Technology, vol. 19 no. 1
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 December 1946

P. Bielkowicz

THE transformation of energy stored in the fuel into heat energy of exhaust gases was followed in the previous parts. The molecular changes occurring in the working fluid were…

Abstract

THE transformation of energy stored in the fuel into heat energy of exhaust gases was followed in the previous parts. The molecular changes occurring in the working fluid were investigated, as well as the changes of its physical constants due to the high pressures and temperatures. It is known that the combustion of hydrocarbon fuel results for the most part in the formation of CO2 and H2O as combustion products and consequently special attention is given to the behaviour of these gases since they constitute the working fluid of a rocket engine. The general equation of hydrocarbon combustion has the following form:

Details

Aircraft Engineering and Aerospace Technology, vol. 18 no. 12
Type: Research Article
ISSN: 0002-2667

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