Search results
1 – 10 of 36L‐K. Shark, X.Y. Lin, M.R. Varley, B.J. Matuszewski and J.P. Smith
This paper presents an efficient lossless compression method to reduce the storage requirement and transmission time for radiographic non‐destructive testing images of aircraft…
Abstract
This paper presents an efficient lossless compression method to reduce the storage requirement and transmission time for radiographic non‐destructive testing images of aircraft components. The method is based on a combination of predictive coding and the integer wavelet transform. By using the component CAD model to divide the radiographic image of aircraft components into different regions with each region having the same material structure, the parameters of the predictors and the choice of the integer wavelet transform are optimised according to the specific image features contained in each region. Using a real radiographic image of a practical aircraft component as an example, the proposed method is presented and shown to offer a significantly higher compression ratio than other lossless compression schemes currently available.
Details
Keywords
This note aims to introduce a terminal guidance law that is able to compensate for evasive target maneuvers without estimating their acceleration.
Abstract
Purpose
This note aims to introduce a terminal guidance law that is able to compensate for evasive target maneuvers without estimating their acceleration.
Design/methodology/approach
The new guidance law is derived in the framework of linear-quadratic optimal control to ensure interception with minimum energy even in the presence of a target maneuver.
Findings
An explicit closed-form expression for the missile acceleration command is provided, which turns out to be a non-trivial extension of proportional navigation guidance. Simulation results against evasive maneuvers of various intensities are provided to compare the new law to classical ones and thus show the benefits of the proposed approach.
Originality/value
The proposed guidance law was not reported so far in the literature and provides a simple way to deal with evasive maneuvers.
Details
Keywords
Sarah Larney, Curt G. Beckwith, Nickolas D. Zaller, Brian T. Montague and Josiah Rich
The purpose of this paper is to consider the potential benefits and challenges of applying a strategy of “seek, test, treat and retain” (STTR) to hepatitis C virus (HCV) in the US…
Abstract
Purpose
The purpose of this paper is to consider the potential benefits and challenges of applying a strategy of “seek, test, treat and retain” (STTR) to hepatitis C virus (HCV) in the US criminal justice system.
Design/methodology/approach
The authors draw on the published literature to illustrate how each component of STTR could be applied to HCV in the US criminal justice system, and describe challenges to the implementation of this strategy.
Findings
The burden of morbidity and mortality associated with chronic HCV infection in the USA is increasing and without significantly increased treatment uptake, will likely continue to do so for several decades. The authors argue that the US criminal justice system is an ideal focus for HCV case finding and treatment due to a high prevalence of infection and large volume of individuals in contact with this system. STTR would identify large numbers of HCV infections, leading to opportunities for secondary prevention and primary care. Important challenges to the implementation of STTR include treatment costs and training of prison medical providers.
Originality/value
This paper highlights opportunities to address HCV in the US criminal justice system.
Details
Keywords
Ambika Bhushan, Shan-Estelle Brown, Ruthanne Marcus and Frederick L Altice
Little is understood about the self-described barriers that recently released HIV-infected prisoners face when accessing healthcare and adhering to medications. The purpose of…
Abstract
Purpose
Little is understood about the self-described barriers that recently released HIV-infected prisoners face when accessing healthcare and adhering to medications. The purpose of this paper is to elucidate these barriers from the perspective of released prisoners themselves.
Design/methodology/approach
A qualitative assessment using 30 semi-structured interviews explored individuals’ self-reported acute stressors and barriers to health-seeking during community re-integration for recidivist prisoners. Leventhal’s Self-Regulation Model of Illness (SRMI) is applied to examine both structural and psychological barriers.
Findings
The SRMI explains that individuals have both cognitive and emotional processing elements to their illness representations, which mediate coping strategies. Cognitive representations of HIV that mediated treatment discontinuation included beliefs that HIV was stigmatizing, a death sentence, or had no physiological consequences. Negative emotional states of hopelessness and anger were either acute or chronic responses that impaired individuals’ motivation to seek care post-release. Individuals expressed feelings of mistrust, fatalism and denial as coping strategies in response to their illness, which reduced likelihood to seek HIV care.
Originality/value
Interventions for HIV-infected individuals transitioning to the community must incorporate structural and psychological components. Structural support includes housing assistance, employment and health insurance, and linkage to mental health, substance abuse and HIV care. Psychological support includes training to enhance agency with medication self-administration and HIV education to correct false beliefs and reduce distress. Additionally, healthcare workers should be specifically trained to establish trust with these vulnerable populations.
Details
Keywords
Yazhini Subramanian, Muhammad Naeem Khan, Sara Berger, Michelle Foisy, Ameeta Singh, Dan Woods, Diane Pyne and Rabia Ahmed
The purpose of this paper is to assess the impact of short-term incarceration on antiretroviral therapy (ART) adherence, virologic suppression, and engagement and retention in…
Abstract
Purpose
The purpose of this paper is to assess the impact of short-term incarceration on antiretroviral therapy (ART) adherence, virologic suppression, and engagement and retention in community care post-release.
Design/methodology/approach
A retrospective chart review of patients who attended the human immunodeficiency virus (HIV) Outreach Clinic at a Canadian remand center between September 2007 and December 2011 was carried out. Data extraction included CD4 lymphocyte count, HIV viral load, ART prescription refills, and community engagement and retention during and one-year pre- and post-incarceration.
Findings
Outpatient engagement increased by 23 percent (p=0.01), as did ART adherence (55.2-70.7 percent, p=0.01), following incarceration. Retention into community care did not significantly improve following incarceration (22.4 percent pre-incarceration to 25.9 percent post-release, p=0.8). There was a trend toward improved virologic suppression (less than 40 copies/ml; 50-77.8 percent (p=0.08)) during incarceration and 70. 4 percent sustained this one-year post-incarceration (p=0.70).
Originality/value
The impact of short-term incarceration in a Canadian context of universal health coverage has not been previously reported and could have significant implications in optimizing HIV patient outcomes given the large number of HIV-positive patients cycling through short-term remand centers.
Details
Keywords
Alisa G. Brink, Jennifer C. Coats and Frederick W. Rankin
Participative budgeting can benefita firm by incorporating subordinates’ private information into financing and operating decisions. In the managerial accounting literature…
Abstract
Participative budgeting can benefita firm by incorporating subordinates’ private information into financing and operating decisions. In the managerial accounting literature, studies of participative budgeting posit superiors that range from passively committed to highly active participants, some of whom are permitted to communicate, choose compensation schemes, negotiate with subordinates, and reject budgets. This paper synthesizes and analyzes experimental research in participative budgeting with a focus on the role of the superior defined in the research design, and on how that role affects budget outcomes, subordinate behavior, and in some cases superior behavior. We demonstrate how superior type influences economic and behavioral predictions, and likewise affects budgeting outcomes and the interpretation of the results. This paper is intended to further our understanding of how superior type affects behavior in participative budgeting studies, and to facilitate the choice of superior type in future research designs.
Details
Keywords
In management accounting research, the capabilities of Partial Least Squares Structural Equation Modelling (PLS-SEM) have only partially been utilized. These yet unexploited…
Abstract
In management accounting research, the capabilities of Partial Least Squares Structural Equation Modelling (PLS-SEM) have only partially been utilized. These yet unexploited capabilities of PLS-SEM are a useful tool in the often explorative state of research in management accounting. After reviewing eleven top-ranked management accounting journals through the end of 2013, 37 articles in which PLS-SEM is used are identified. These articles are analysed based on multiple relevant criteria to determine the progress in this research area, including the reasons for using PLS-SEM, the characteristics of the data and the models, and model evaluation and reporting. A special focus is placed on the degree of importance of these analysed criteria for the future development of management accounting research. To ensure continued theoretical development in management accounting, this article also offers recommendations to avoid common pitfalls and provides guidance for the advanced use of PLS-SEM in management accounting research.
Details
Keywords
Gexiang Zhang and Xu Li
The purpose of this paper is to develop a new recognition system for identifying advanced radar emitter signals (RES).
Abstract
Purpose
The purpose of this paper is to develop a new recognition system for identifying advanced radar emitter signals (RES).
Design/methodology/approach
Initially, the framework of the new recognition system is outlined. Then, feature extraction using resemblance coefficient and wavelet packet decomposition, and feature selection based on quantum‐inspired genetic algorithm, and a classifier combining K‐means clustering, support vector machines and Mahalanobis distance are applied to actualize the recognition system. Finally, experiments are carried out on RES.
Findings
A valid recognition system with its framework and implementation is presented to solve the difficult problem of advanced RES recognition.
Research limitations/implications
Initial investigation is made on modern RES recognition. Further work may be done on decreasing the error rates and enhancing recognition efficiency. Real signals instead of simulated signals can be applied.
Practical implications
The system developed here can be applied to electronic reconnaissance systems such as electronic support measures, electronic intelligence and radar warning receiver.
Originality/value
The paper presents a novel recognition system and its implementation for modern RES. Extensive experiments conducted on 155 RES with eight intra‐pulse modulations show the feasibility and validity of the introduced system.
Details
Keywords
Steffen Raub, Margarita Cruz, Jens Gorka, Demian Hodari and Lionel Saul
In the wake of COVID-19, the cruise industry is experiencing an unprecedented talent management challenge. Extant research suggests a broad range of work values that may attract…
Abstract
Purpose
In the wake of COVID-19, the cruise industry is experiencing an unprecedented talent management challenge. Extant research suggests a broad range of work values that may attract job candidates to the cruise industry. The purpose of this study is to assess whether there are significant differences in the importance ratings of these work values for the millennials, compared to those of the preceding generation X.
Design/methodology/approach
With the support of a leading recruitment agency, the authors obtained responses to an online survey of 1,320 job candidates, of whom 830 were millennials. Using a quantitative approach, the authors asked them to assess the importance of eight work value domains. The authors ranked these domains for the millennials and for generation X and compared mean importance ratings using t-tests.
Findings
The results of this study reveal that differences between millennials and generation X in the ranking of the eight work value domains do exist. The authors did not find support for any systematic differences in terms of “extrinsic” versus “intrinsic” work values. However, the results show that the importance of “ego-driven” work values (e.g. support, development, compensation, work–life balance and comfort) is significantly higher for millennials. Conversely, for the more “altruistic” factors, there are no significant differences between the two generations.
Originality/value
Based on a very large sample of job candidates from the cruise industry, the results support the predictions of generational theories. The authors show that differences in work value ratings between generation X and the millennials exist. The authors also provide a novel perspective on the dimensions along which these differences materialize.
设计/方法/方法
在一家领先的招聘机构的支持下, 我们对1320名求职者进行了在线调查, 其中830名是千禧一代。利用定量方法定量评估求职者八个工作价值域的重要性。对千禧一代和X一代的这些领域进行了排名, 并使用t检验重要性评分平均值。
目的
新冠肺炎疫情后, 邮轮行业面临着前所未有的人才管理挑战。现有的研究表明, 广泛的工作价值观可能会吸引求职者进入邮轮行业。本研究的目的是评估千禧一代对这些工作价值的重要性评分与上一代X相比是否存在显著差异。
研究发现
研究结果显示, 千禧一代和X一代在这八个工作价值领域的排名上确实存在差异。在“外在”和“内在”工作价值方面, 没有任何系统差异的证据支持。然而, 研究结果指出, “自我驱动”的工作价值观(如支持、发展、薪酬、工作与生活的平衡和舒适)对千禧一代的重要性明显更高。相反, 对于更“利他”的因素, 两代人之间没有显著差异。
创意/价值
基于邮轮行业的大量求职者样本, 结果支持代际理论的预测。研究表明, X一代和千禧一代在工作价值评价上存在差异。还提供了一个关于这些差异实现维度的新视角。
Diseño/metodología/enfoque
Con el apoyo de una importante agencia de contratación, se obtuvieron respuestas a una encuesta online de 1.320 candidatos a un puesto de trabajo, de los cuales 830 eran de la generación del milenio (milenials). A partir de un enfoque cuantitativo, se preguntó que evaluaran la importancia de ocho dimensiones sobre valores laborales. Se clasificaron estas dimensiones para los milenials y para la generación X y se compararon las valoraciones medias de su importancia mediante pruebas t.
Objetivo
A raíz del Covid-19, el sector de los cruceros está experimentando un reto de gestión del talento sin precedentes. La investigación existente sugiere una amplia gama de valores laborales que pueden atraer a los candidatos al sector de los cruceros. El objetivo de esta investigación es evaluar si existen diferencias significativas en las puntuaciones sobre la importancia de estos valores laborales para los millenials, en comparación con los de la generación X precedente.
Resultados
Nuestros resultados revelan que existen diferencias entre los milenials y la generación X en la clasificación de las ocho dimensiones sobre valores laborales. No se encuentra apoyo para ninguna diferencia sistemática en términos de valores laborales “extrínsecos” frente a “intrínsecos”. Sin embargo, nuestros resultados muestran que la importancia de los valores laborales “impulsados por el ego” (por ejemplo, el apoyo, el desarrollo, la retribución, el equilibrio entre la vida laboral y personal y la comodidad) es significativamente mayor para los milenials. Por el contrario, para los factores más “altruistas” no hay diferencias significativas entre las dos generaciones.
Originalidad/valor
Basándonos en una muestra muy amplia de candidatos a un puesto de trabajo en el sector de los cruceros, nuestros resultados respaldan las predicciones de las teorías generacionales. Se demuestra que existen diferencias en las valoraciones del trabajo entre la generación X y los milenials. También, se aporta una perspectiva novedosa sobre las dimensiones a lo largo de las cuales se materializan estas diferencias.
Details
Keywords
María J. Sánchez-Expósito and David Naranjo-Gil
The purpose of this paper is to analyze the simultaneous effect of management control system (MCS) designs (belief vs boundary) and cognitive orientations (individualism vs…
Abstract
Purpose
The purpose of this paper is to analyze the simultaneous effect of management control system (MCS) designs (belief vs boundary) and cognitive orientations (individualism vs collectivism) on performance misreporting by combining accounting and psychology literature.
Design/methodology/approach
This paper is based on a laboratory experiment with 67 postgraduate students.
Findings
Results show that an individualist cognitive orientation increased performance misreporting. The results also showed that a boundary design of MCS intensified the relationship between individualist orientation and performance misreporting.
Research limitations/implications
This paper shed some light about the role of non-pecuniary control system for reducing managerial performance misreporting. The findings support that the tendency of individuals to avoid misreporting depends not only on the MCS design but also on the match between it and individual’s cognitive orientations.
Practical implications
Managers in organizations should consider the predominant cognitive orientation of individuals when they design MCS. They should consider that control systems, which impose coercive constraints to individuals, may encourage feelings of psychological reactance and then increase performance misreporting.
Originality/value
This study is among the first to combine psychology and accounting literature to analyze how the design of MCS influences individuals’ motivation to misreport their performance. It provided evidence about the effect of non-monetary control systems on individual’s behavior in organizations.
Details