Search results

1 – 10 of 285
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 12 March 2018

Albert E. Patterson, Parvathavadhani Bahumanyam, Raghu Katragadda and Sherri L. Messimer

A useful potential application of additive manufacturing (AM) techniques is in automated assembly of existing discrete parts via printing of new material onto two or more parts…

366

Abstract

Purpose

A useful potential application of additive manufacturing (AM) techniques is in automated assembly of existing discrete parts via printing of new material onto two or more parts simultaneously to form joints between them. The purpose of this paper is to explore the concept of extrusion-based AM for automated assembly, examine potential concerns and perform validation to test the feasibility and value of such an assembly method.

Design/methodology/approach

To validate the theory and address potential concerns, six factorial-designed sets of joined ABS, PETG and PLA samples were manufactured and tensile tested. Each set contained two replications of four samples and was a unique part-joint material combination. To better interpret the results, a new static material characterization was completed on the materials used, as well as joint tests using four mechanical and chemical methods for each material. In total, 69 test articles were examined.

Findings

The tests showed that the joints were effective and strong, even under the inherently eccentric geometry. While there was some variance between replications, in almost every case, the AM joints were found to be equal or superior to those made by traditional methods. ANOVA showed variance in which factors were significant between sets, but all cases were shown to satisfy the Fisher Assumptions at a significance of a = 0.10.

Originality/value

This paper develops and validates a new application of extrusion-based AM. When developed further, this application is expected to increase the commercial application range and industrial efficiency of fused deposition modeling and AM in general. The results of this study should provide a link between traditional automated assembly methods and AM. This paper also provides some original AM material characterization data and observations on material behavior under eccentric loading.

Details

Rapid Prototyping Journal, vol. 24 no. 2
Type: Research Article
ISSN: 1355-2546

Keywords

Access Restricted. View access options
Article
Publication date: 25 October 2021

Albert E. Patterson, Charul Chadha and Iwona M. Jasiuk

This paper aims to explore the design and fabrication of meso-scale Manufacturing Process-Driven Structured Materials (MPDSMs). These are designed, architected materials where the…

285

Abstract

Purpose

This paper aims to explore the design and fabrication of meso-scale Manufacturing Process-Driven Structured Materials (MPDSMs). These are designed, architected materials where the prime design requirement is manufacturability. The concepts are applied to those fabricated using fused deposition modeling or fused filament fabrication (FDM/FFF), a thermoplastic polymer additive manufacturing (AM) process. Three case studies were presented to demonstrate the approach.

Design/methodology/approach

The paper consists of four main sections; the first developed the MPDSMs concept, the second explored manufacturability requirements for FDM/FFF in terms of MPDSMs, the third presented a practical application framework and the final sections provided some case studies and closing remarks.

Findings

The main contributions of this study were the definition and development of the MDPSMs concept, the application framework and the original case studies. While it is most practical to use a well-defined AM process to first explore the concepts, the MPDSMs approach is neither limited to AM nor thermoplastic polymer materials nor meso-scale material structures. Future research should focus on applications in other areas.

Originality/value

The MPDSMs approach as presented in this concept paper is a novel method for the design of structured materials where manufacturability is the prime requirement. It is distinct from classic design-for-manufacturability concepts in that the design space is limited to manufacturable design candidates before the other requirements are satisfied. This removes a significant amount of schedule and costs risk from the design process, as all the designs produced are manufacturable within the problem tolerance.

Details

Rapid Prototyping Journal, vol. 28 no. 4
Type: Research Article
ISSN: 1355-2546

Keywords

Access Restricted. View access options
Article
Publication date: 25 October 2018

Mark Goodhew, Jane Stein-Parbury and Angela Dawson

It is unclear how consumer participation (CP) can be optimised to transform drug and alcohol treatment services and improve health outcomes. The purpose of this paper is to…

611

Abstract

Purpose

It is unclear how consumer participation (CP) can be optimised to transform drug and alcohol treatment services and improve health outcomes. The purpose of this paper is to present the findings of a systematic review examining the types and benefits of activities, and the factors that facilitate CP in drug treatment services.

Design/methodology/approach

A structured search of four databases was undertaken to identify peer reviewed primary research literature in English. Screened articles were appraised. A content analysis was applied to examine the types and outcomes of CP and the associated factors affecting the process. In total, 16 articles were included for review.

Findings

A range of CP activities were identified, and benefits included increased consumer satisfaction, and improved health service delivery. Factors that facilitated the process of CP included positive attitudes of both consumers and providers and employment of people with a lived experience of drug use. However, the lack of consumer and organisational capacity, negative attitudes of providers and power imbalances between consumers and providers constrained CP efforts.

Practical implications

To maximise the benefits of CP in drug and alcohol treatment services, negative attitudes about CP and power dynamics between consumers and health providers need to be addressed. This can be achieved by the strategic use of strengths-based interventions and consumer led education to enhance social capital.

Originality/value

This is the first known review to examine the benefits and facilitators of CP in drug treatment services.

Available. Content available
Article
Publication date: 1 June 2021

Albert Vasso, Richard Cobb, John Colombi, Bryan Little and David Meyer

The US Government is challenged to maintain pace as the world’s de facto provider of space object cataloging data. Augmenting capabilities with nontraditional sensors present an…

1100

Abstract

Purpose

The US Government is challenged to maintain pace as the world’s de facto provider of space object cataloging data. Augmenting capabilities with nontraditional sensors present an expeditious and low-cost improvement. However, the large tradespace and unexplored system of systems performance requirements pose a challenge to successful capitalization. This paper aims to better define and assess the utility of augmentation via a multi-disiplinary study.

Design/methodology/approach

Hypothetical telescope architectures are modeled and simulated on two separate days, then evaluated against performance measures and constraints using multi-objective optimization in a heuristic algorithm. Decision analysis and Pareto optimality identifies a set of high-performing architectures while preserving decision-maker design flexibility.

Findings

Capacity, coverage and maximum time unobserved are recommended as key performance measures. A total of 187 out of 1017 architectures were identified as top performers. A total of 29% of the sensors considered are found in over 80% of the top architectures. Additional considerations further reduce the tradespace to 19 best choices which collect an average of 49–51 observations per space object with a 595–630 min average maximum time unobserved, providing redundant coverage of the Geosynchronous Orbit belt. This represents a three-fold increase in capacity and coverage and a 2 h (16%) decrease in the maximum time unobserved compared to the baseline government-only architecture as-modeled.

Originality/value

This study validates the utility of an augmented network concept using a physics-based model and modern analytical techniques. It objectively responds to policy mandating cataloging improvements without relying solely on expert-derived point solutions.

Details

Journal of Defense Analytics and Logistics, vol. 5 no. 1
Type: Research Article
ISSN: 2399-6439

Keywords

Access Restricted. View access options
Article
Publication date: 1 February 2003

Tommie Singleton and Dale L. Flesher

In 2002, The Institute of Internal Auditors (IIA) observed the 25th anniversary of the publication of its first Systems, Auditability, & Control (SAC) study. This paper reviews…

942

Abstract

In 2002, The Institute of Internal Auditors (IIA) observed the 25th anniversary of the publication of its first Systems, Auditability, & Control (SAC) study. This paper reviews the development of the SAC projects and their impact on Information Systems (IS) auditing in particular. Three different research methodologies were used for collecting the data for this research. First, a rigorous literature review was conducted. Second, an oral‐history methodology was used to collect data via interviews. Third, notes and minutes from many early committee meetings of IIA, including the SAC Committee, were studied. The early years (1954‐1977) saw a dearth of related literature. Thus individual accountants and auditors found it difficult to acquire or gather information on emerging issues. The Systems, Auditability, & Control (SAC) study published in 1977 was one of the major attempts to codify IS auditing knowledge. This study has been followed up by three other SAC projects in 1991, 1994, and 2001. These SAC projects have provided some of the best guidance for IS auditors over these last 25 years. From the beginning of IS auditing, there has been a continued acceleration of technology. In particular, the audit process has been impacted by the proliferation of microcomputers.

Details

Managerial Auditing Journal, vol. 18 no. 1
Type: Research Article
ISSN: 0268-6902

Keywords

Access Restricted. View access options
Article
Publication date: 27 September 2011

Rafael Pastor, Alberto García‐Villoria and Albert Corominas

Simple assembly line balancing problem type 1 is the most studied assembly line problem and many procedures have been proposed to solve it. Ho and Emrouznejad proposed to add a…

254

Abstract

Purpose

Simple assembly line balancing problem type 1 is the most studied assembly line problem and many procedures have been proposed to solve it. Ho and Emrouznejad proposed to add a novel set of constrains into a binary integer‐programming model that is useful for breaking symmetries between equivalent solutions. The purpose of this paper is to compare this way of breaking symmetries with the usual ones existing in the literature (by means of the objective function and by means of additional constraints) and propose two novel ways of breaking symmetries which improve the existing ones.

Design/methodology/approach

For the comparison, the authors solve the well‐known benchmark instances.

Findings

It was found that the most efficient model is one of the new models which has not been proposed in the literature to date. Moreover, the authors noticed that Ho and Emrouznejad attribute a mathematical model to Patterson and Albracht that is different from the original model proposed by Patterson and Albracht.

Originality/value

There is not, in the literature, a comparison between classical and new mathematical models. The authors give an empirical comparison between them, together with two new ones that the authors propose. Moreover, the authors point out the mistake about the attribution model in Ho and Emrouznejad's, work attributing a mathematical model to Patterson and Albracht, with the aim of preventing its possible propagation in future researches.

Details

Assembly Automation, vol. 31 no. 4
Type: Research Article
ISSN: 0144-5154

Keywords

Access Restricted. View access options
Article
Publication date: 28 October 2013

Anne Lise Bjørnstad and Frederick M.J. Lichacz

The purpose of this paper is to focus on organizational flexibility and explore its antecedents, organizational structure, and processes, as proposed by network organization…

3054

Abstract

Purpose

The purpose of this paper is to focus on organizational flexibility and explore its antecedents, organizational structure, and processes, as proposed by network organization theories. The study also explores the possible moderating effects of power distance (Pd) and cultural diversity.

Design/methodology/approach

Using self-report data from three different multinational military exercises and one laboratory experiment, the paper explored the relationships between perceptions of flat organizational structure, decentralized processes, and flexibility. The data from each of these studies were analyzed both separately and together.

Findings

The analyses revealed that decentralization had the most consistent relationship to organizational flexibility across each of the four studies. Moreover, when the data were analyzed conjunctively, significant positive relationships between decentralization and flexibility and between flat structure and flexibility were observed. No moderating effects of Pd or cultural diversity were found.

Practical implications

The results suggest that decentralizing processes and creating flatter hierarchies may contribute to achieving higher levels of organizational flexibility in military organizations.

Originality/value

The paper contributes to empirical support for the central theoretical propositions of network organizational literature, including moderating factors that are essential in multinational organizational contexts.

Details

Leadership & Organization Development Journal, vol. 34 no. 8
Type: Research Article
ISSN: 0143-7739

Keywords

Access Restricted. View access options
Book part
Publication date: 23 July 2015

Abstract

Details

Tourism Research Frontiers: Beyond the Boundaries of Knowledge
Type: Book
ISBN: 978-1-78350-993-5

Access Restricted. View access options
Article
Publication date: 12 January 2015

Salim Moussa

The aim of this paper is to critically review the most significant writings on “two” constructs that have quickly acquired the status of “important marketing topics”; that is…

1903

Abstract

Purpose

The aim of this paper is to critically review the most significant writings on “two” constructs that have quickly acquired the status of “important marketing topics”; that is, brand attachment (BA) and brand love (BL).

Design/methodology/approach

A profound and parallel inspection of highly influential articles along with ensuing essays by the same single authors is performed.

Findings

This review reveals that: hardly a year goes by without some reinventions or retouching of these constructs’ conceptual characteristics; there are several striking similarities between them; the politics of marketing theory are at work in keeping these constructs away from each other; the literature under scrutiny not only suffers from amnesia, but also from some severe schizophrenic symptoms; and that BA and BL are nothing more than the same core knowledge product offered under different brand names.

Research limitations/implications

This review is limited to considering the constructs of BA and BL.

Originality/value

Because the literature on BA and BL has been essentially empirical, this paper has the potential to add a compulsory conceptual component to it. It also has the potential of instigating discussions, debates and, in due course, a deeper understanding of these “two” constructs.

Details

Qualitative Market Research: An International Journal, vol. 18 no. 1
Type: Research Article
ISSN: 1352-2752

Keywords

Access Restricted. View access options
Article
Publication date: 5 March 2021

Anne Lise Bjørnstad and Pål Ulleberg

The purpose of this study is to better understand the consequences of trust between personnel at different hierarchical levels for organizational effectiveness. The authors aim to…

1243

Abstract

Purpose

The purpose of this study is to better understand the consequences of trust between personnel at different hierarchical levels for organizational effectiveness. The authors aim to explore the direct effects and the interaction effects of trust with organizational structure and processes. The study focuses on military organizations and expands on models and research from this context.

Design/methodology/approach

Survey data were collected from a Norwegian military exercise organization at two different hierarchical levels. The hypothesized relationships between the variables were tested using moderation and serial mediation analyses.

Findings

Trust between personnel at different hierarchical levels was found to positively influence organizational effectiveness in terms of higher shared awareness of tasks and responsibilities, better information sharing and, in turn, better decision-making. A perceived flat organizational structure and decentralized processes were found to increase flexibility, an increase that in turn improved decision-making. Moderation analyses further suggested that trust between hierarchical levels could attenuate the negative effects of personnel's perception of their organization as hierarchical and centralized.

Practical implications

The study’s results suggest that, at least in Norwegian military contexts, practitioners should be concerned with building trust between personnel at different hierarchical levels, flattening the organizational structure, and decentralizing processes to increase organizational flexibility and effectiveness.

Originality/value

The present study contributes to a better understanding of the role of trust between personnel at different hierarchical levels in the effort to achieve effective organizational structures and processes in military contexts.

Details

Leadership & Organization Development Journal, vol. 42 no. 4
Type: Research Article
ISSN: 0143-7739

Keywords

1 – 10 of 285
Per page
102050