Quality improvement of optically translucent parts manufactured from LS and SL

2016 ◽  
Vol 22 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Mengqi Yuan ◽  
David Bourell
Keyword(s):  
Optical Properties ◽  
Quality Improvement ◽  
Layer Thickness ◽  
Design Methodology ◽  
Plate Thickness ◽  
White Light Source ◽  
Content Type ◽  
New Material ◽  
And Performance

Purpose – The purpose of this paper is to improve the quality of additive manufactured optically translucent parts by investigating the manufacturing issues, analyzing lithophane production criteria and identifying the best translucent material and additive manufacturing (AM) technology. Design/methodology/approach – Figured lithophanes were laser sintered on a 3D Systems SinterStation® HiQ™ with varying layer thickness and plate thickness. Laser sintered (LS) polyamide (PA) 12 blanks were cyanoacrylate infiltrated and polished. Optical properties and performance were compared with the original LS blanks. Lithophanes and blanks were manufactured using 3D systems stereo lithography apparatus (SLA)® Viper ™si2 station, and optical properties and lithophane performance were compared with the LS specimens. Findings – When building in the XY plane, it is optimal to sinter with the minimum layer thickness (0.076 mm) and maximum plate thickness (5 mm). Cyanoacrylate infiltration and polishing assists in reducing the LS PA 12 plate surface roughness, but polishing does not affect the lithophane performance. The best LS candidate should have an absorption coefficient of 0.5/mm using a white light source. Improved resolution but reduced contrast was observed on stereolithography (SL) specimens compared to LS parts. Research limitations/implications – Transmittance experiments were performed on three SL parts which was not sufficient for optical property calculation. Limited literature was found for new material exploration. Originality/value – It is the first effort to study systematically quality improvement issues of LS PA optically translucent parts. A comparison is made of optical performance between parts made using LS and SL.

Workplace innovation for better jobs and performance

2011 ◽  
Vol 60 (4) ◽  
pp. 404-415 ◽  
Author(s):  
Frank Pot
Keyword(s):  
Trade Unions ◽  
Design Methodology ◽  
Social Innovation ◽  
Evaluation Research ◽  
Quality Of Working Life ◽  
Content Type ◽  
Change Projects ◽  
Workplace Innovation ◽  
And Performance

PurposeThe purpose of this paper is to describe the need for workplace innovation policies and practices in Europe and evaluate programs that already have been developed.Design/methodology/approachThe paper describes the concept of workplace innovation and trends in society explaining its emergence. The paper then presents and discusses the results of evaluation research as far as this is available.FindingsA growing number of countries is conducting or developing some kind of programme on workplace innovation. These programmes differ in size and governance. Evaluation research shows that simultaneous improvement of performance and quality of working life is possible under certain conditions such as the participation of employees in change projects.Research limitations/implicationsConcepts and designs of evaluation research projects differ considerably. This gives new challenges for companies, trade unions, governments and researchers. In EU2020, little attention is paid to workplace innovation but there is a ray of hope in the draft integrated guidelines for employment policies and in the Flagship Initiative Innovation Union.Originality/valueSocial innovation in the workplace, or workplace innovation, is a new concept, covering to some extent new practices that appear to be relevant for organisations and governments.

scholarly journals Political ties and corporate performance: why efficiency matters?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rabia Najaf ◽  
Khakan Najaf
Keyword(s):  
Political Theory ◽  
Design Methodology ◽  
Corporate Performance ◽  
Political Connections ◽  
Stewardship Theory ◽  
Content Type ◽  
Political Ties ◽  
And Performance ◽  
Practical Implications

PurposeThe purpose of this paper is to examine and explain the complex interrelationships which influence the performance of politically connected firms to create value for their providers of finance and other stakeholders. In doing so, it examines the interrelationships between efficiency and delivering on corporate performance of a firm with political ties.Design/methodology/approachThe authors gathered the literature from the Scopus website. They reviewed the literature of 58 manuscripts about the efficiency and performance of politically connected firms.FindingsThe research finds that the better quality of efficiency of politically connected firms is positively related to the corporate performance of politically connected firms. The authors’ theoretical findings corroborate the political theory, agency theory, stakeholder theory, resource dependency theory and stewardship theory. These theories prove that political connections have an impact on firm performance as a politician reinforces the efficacy. To better understand the effect of political connections on solid performance due to efficiency, this study classifies various efficiencies and links them with political ties.Research limitations/implicationsSeveral avenues of research are suggested to examine further the interrelationships identified.Practical implicationsThe authors’ conceptual findings are valuable for institutional investors, policymakers and stakeholders. To sum up, all theoretical shreds of evidence prove that politically connected firms can enhance performance via efficiency.Originality/valueThe paper conceptualizes the efficiency and performance interrelationships of politically connected firms. The extant literature comparison allows an assessment of the extent to which different efficiency contexts lead to differences in performance.

The 5 conversations that really matter in business: transforming trust, engagement and performance at work

2015 ◽  
Vol 29 (4) ◽  
pp. 3-5
Author(s):  
Nigel Purse
Keyword(s):  
Design Methodology ◽  
Effective Leadership ◽  
Line Managers ◽  
Content Type ◽  
The World ◽  
Trusting Relationships ◽  
And Performance ◽  
Line Manager

Purpose – This paper aims to outline five conversations that leaders must hold to build trusting relationships. People’s engagement at work correlates directly with the quality of relationship they have with their line manager. Leaders need to be supported to develop their capabilities in holding conversations, but more importantly to recognize the power of authenticity. Design/methodology/approach – This paper is based on the author’s work with managers and leaders in organizations around the world. Findings – Holding authentic conversations that focus on the five areas identified will build trust which, in turn, will improve engagement and ultimately drive performance. Originality/value – Leaders are often expected to focus on visionary, decisive and driving action. This paper proposes that this is not enough; building trusting relationships must lie at the heart of effective leadership. It identifies five critical conversations that line managers as leaders must have to build trusting relationships.

Quality improvement through ergonomics intervention at chemical plant

Facilities ◽  
2019 ◽  
Vol 37 (5/6) ◽  
pp. 266-279 ◽  
Author(s):  
Laith A. Hadidi ◽  
Ahmet Kolus ◽  
Mohammed AlKhamis
Keyword(s):  
Quality Improvement ◽  
Design Methodology ◽  
Production Quality ◽  
Manufacturing Plant ◽  
Alert System ◽  
Content Type ◽  
Chemical Manufacturing ◽  
Inspection Process ◽  
Plant Shutdown

Purpose This paper aims to focus on ergonomics intervention and quality implementation at a chemical manufacturing plant in Saudi Arabia that is prone to increased number of quality defects and shutdowns. Design/methodology/approach The paper applies the quality improvement through ergonomics (QUITE) methodology as a solution to improve the level of plants quality and reliability. The QUITE implementation relies on a great amount of human participation and constant check of quality results. The study is conducted to solve two main problems in the plant under study, namely, degradation in the products quality and unsolved frequent shutdowns in the production line Findings The study findings suggested to automate the inspection process through “User Alert” system to stimulate the operator attention who triggers a corrective action to avoid any possible process upset of plant shutdown. The implementation increased productivity from 280 to 310 ton; quality conformance from 91.7 to 96.80 per cent; and reduced shutdown from 1.26 days to almost zero downtime. Originality/value The work shed the light on the effect of ergonomics on the quality of finished products. Usually, ergonomics is related to the work environment. However, ergonomics initiatives can spearhead improvement in production quality.

A systemic approach to quality improvement in public health services

2015 ◽  
Vol 28 (1) ◽  
pp. 8-23 ◽  
Author(s):  
Amina Sahel ◽  
Abdelali Alaoui Belghiti ◽  
Vincent DeBrouwere ◽  
Filomena Valente Soares ◽  
Guy Kegels ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Assessment Tool ◽  
Statistical Tests ◽  
Public Health Services ◽  
Content Type ◽  
Self Evaluation ◽  
Sustainable Improvement ◽  
Signed Rank ◽  
And Performance

Purpose – The purpose of this paper is to discuss the results of the first four years of implementation of a quality program called “Quality Contest” (QC). This program was implemented from 2007 onward to improve the quality of hospital services by the Moroccan Ministry of Health. The peculiarity of this intervention, held every 18 months, is that it combines several approaches (self-evaluation, external audits with feedback, hospital ranking, awards and performance disclosure) and focuses on the quality of management. Design/methodology/approach – The assessment tool used to evaluate the quality of hospital management consists of 80 items. In each contest, a score is attributed to each item based on the score given for self-evaluation and the score given by external auditors. The sum of these scores allows the global performance score of the hospital to be obtained. To compare the performances over time and among hospitals, Wilcoxon signed-rank, Wilcoxon–Mann–Whitney and Kruskal–Wallis statistical tests were used. Findings – The results of the QC organized between 2007 and 2010 revealed that the hospitals participating in all the three contests had significantly improved their performance levels in terms of the quality of management. There was also a significant association between the number of times hospitals participated in the QC and the performance scores attained. Originality/value – The paper reports an original quality improvement approach in a developing country that succeeded in triggering sustainable improvement dynamics by combining support (feedback) with reward (prizes) and pressure measures (ranking, performance disclosure).

Electronic warp-break detection mechanism for manual looms

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alex Osei Afriyie ◽  
Ebenezer Kofi Howard ◽  
Benjamin Kwablah Asinyo ◽  
William Badoe ◽  
Raphael Kanyire Seidu ◽  
...  
Keyword(s):  
Design Methodology ◽  
Plate Thickness ◽  
Alert System ◽  
Detection Mechanism ◽  
Content Type ◽  
Testing Procedures ◽  
Electronic Circuitry ◽  
Steel Bars ◽  
Test Outcomes

Purpose The purpose of this study is to develop a system that detects warp breakage in manual looms using simple mechanisms combined with electronic circuitry. Design/methodology/approach This study used the universal design methodology model where results from observations and interviews aided in designing the appropriate blueprints for the mechanism. Findings Testing procedures revealed that the conductivity of steel bars coupled with the weight of the droppers affected the efficiency of the mechanism. Additionally, the weight of the drop wires influenced the rising of the warp threads during shedding. Considering this, a plate thickness of 0.06 mm was ideal for the droppers which did not affect warp shedding. Test outcomes at the weaving shed proved the workability of the mechanism for timely or prompt repair of a broken warp by weavers that ensured fabric quality. Originality/value The issue of warp breaks remains a critical problem at weaving on manual looms which influence the quality of fabrics. These looms are used by craftsmen in producing interesting fabrics for the market of which they depend on for their living. Premise on this, a two-way (light + sound) alert system was developed to assist weavers to effectively locate and repair broken yarns. Additionally, weavers with special needs (blind people) would be notified on a warp break for immediate repair from someone. This would limit the unnecessary challenges associated with broken warp yarns during weaving.

Creating a growth mindset

2017 ◽  
Vol 16 (4) ◽  
pp. 155-160
Author(s):  
Ian Johnston
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Growth Mindset ◽  
Cultural Space ◽  
Content Type ◽  
Fixed Mindset ◽  
And Performance

Purpose This paper aims to show that everything a business does is fundamentally reliant on its culture. Culture determines how successful a strategy is and whether that strategy can be executed. If the culture in a business is out of alignment, it is imperative to change it. This paper examines how HR professionals can take ownership of this cultural space and help to create a growth mindset throughout the organisation. Design/methodology/approach The paper is based on experience gained through working with several large organisations to transform their people culture and performance by embracing a growth mindset and to help their HR leadership become the early champions of change, thus ensuring the process was successfully delivered. The paper includes case studies of two organisations where successful cultural shaping delivered improved results. Findings Companies with a growth mindset will outperform those with a fixed mindset. Changing mindsets is not overly complex, but it requires flawless implementation with the HR leaders at the forefront. Originality/value As Lou Gerstner, who turned around the computing giant IBM, said “I finally realised that culture is not part of the game, it is the game”. By understanding how individual mindsets impact culture, HR professionals can own and drive their organisation’s culture-shaping efforts.

Qualitative generalising in accounting research: concepts and strategies

2016 ◽  
Vol 29 (6) ◽  
pp. 1100-1131 ◽  
Author(s):  
Lee D. Parker ◽  
Deryl Northcott
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Key Factors ◽  
General Applicability ◽  
Information Systems Management ◽  
Content Type ◽  
Accounting Research ◽  
Research Findings ◽  
Quality Of Research

Purpose – The purpose of this paper is to identify and articulate concepts and approaches to qualitative generalisation that will offer qualitative accounting researchers avenues for enhancing and justifying the general applicability of their research findings and conclusions. Design/methodology/approach – The study and arguments draw from multidisciplinary approaches to this issue. The analysis and theorising is based on published qualitative research literatures from the fields of education, health sciences, sociology, information systems, management and marketing, as well as accounting. Findings – The paper develops two overarching generalisation concepts for application by qualitative accounting researchers. These are built upon a number of qualitative generalisation concepts that have emerged in the multidisciplinary literatures. It also articulates strategies for enhancing the generalisability of qualitative accounting research findings. Research limitations/implications – The paper provides qualitative accounting researchers with understandings, arguments and justifications for the generalisability of their research and the related potential for wider accounting and societal contributions. It also articulates the key factors that impact on the quality of research generalisation that qualitative researchers can offer. Originality/value – This paper presents the most comprehensively sourced and developed approach to the concepts, strategies and unique deliverables of qualitative generalising hitherto available in the accounting research literature.

scholarly journals Who guarantees the quality of the quality assurance agencies? The exploration of the establishment and growth of the Asia-Pacific Quality Register (APQR)

2017 ◽  
Vol 11 (2) ◽  
pp. 58-67 ◽  
Author(s):  
Jianxin Zhang ◽  
Jagannath Patil
Keyword(s):  
Higher Education ◽  
Quality Assurance ◽  
Design Methodology ◽  
Asia Pacific ◽  
Qualitative Assessment ◽  
Future Prospects ◽  
Asia Pacific Region ◽  
Content Type ◽  
Quality Register

Purpose After the “quantity era,” today higher education has entered into the “quality era” and as “the gate keepers of quality,” quality assurance agencies (QAAs) are playing more and more irreplaceable important roles and their social status are becoming more and more prominent. However, how to guarantee the quality of the QAAs? Who can review the QAAs? The purpose of this paper is based exploration of these questions. Design/methodology/approach Following the founding of the European Quality Assurance Register (EQAR) for Higher Education, the Asia Pacific Quality Register (APQR) became the second in the international quality assurance (QA) networks to implement QA register, in 2015 with initiative of Asia-Pacific Quality Network. Findings This paper first retrospects the history and process of APQR, and subsequently the implementation of APQR is described in detail from the two aspects of the criteria and the procedure, and at the end, the paper concludes with a summary of the three characteristics of this first formal implement of APQR: APQR is an international register open to all the QAAs; APQR emphasizes characteristics evaluation of diversity; and APQR highlights the combination of quantitative assessment and qualitative assessment. Originality/value Today on the international stage of QA, APQR has emerged as “the watchman of quality” in the Asia-Pacific region as counterpart of EQAR in Europe. How far away does such newly emerging form of guaranteeing the QAAs’ quality go forward, what is its future prospects and other concerning issues, are some of the question that need enthusiastic attention and contribution.

The prediction of the cyclic mechanical behavior of stainless steel 304L at room temperature

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hala Messai ◽  
Salim Meziani ◽  
Athmane Fouathia
Keyword(s):  
Stainless Steel ◽  
Design Methodology ◽  
Room Temperature ◽  
Type Model ◽  
Good Prediction ◽  
304L Stainless Steel ◽  
Content Type ◽  
The Third ◽  
Chaboche Model

Purpose The purpose of this paper is to highlight the performance of the Chaboche model in relation to the database identification, tests with imposed deformations were conducted at room temperature on 304L stainless steel specimens. Design/methodology/approach The first two tests were performed in tension-compression between ±0.005 and ±0.01; in the third test, each cycle is composed of the combination of a compression tensile cycle between ±0.01 followed by a torsion cycle between ±0.01723 (non-proportional path), and the last, uniaxial ratcheting test with a mean stress between 250 MPa and −150 MPa. Several identifications of a Chaboche-type model were then performed by considering databases composed of one or more of the cited tests. On the basis of these identifications, the simulations of a large number of ratchet tests in particular were carried out. Findings The results present the effect of the optimized parameters on the prediction of the behavior of materials which is reported in the graphs, Optimizations 1 and 2 of first and second tests and Optimization 4 of the third test giving a good prediction of the increasing/decreasing pre-deformation amplitude. Originality/value The quality of the model's predictions strongly depends on the richness of the database used for the identification of the parameters.

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