scholarly journals The use of rapid prototyping in the joining of fractured historical silver object

2018 ◽  
Vol 24 (3) ◽  
pp. 532-538 ◽  
Author(s):  
Maria Luiza Seixas ◽  
Paulo Santos Assis ◽  
João Cura D’Ars Figueiredo ◽  
Maria Aparecida Pinto ◽  
Daniella Gualberto Caldeira Paula
Keyword(s):  
Rapid Prototyping ◽  
Design Methodology ◽  
Mechanical Stability ◽  
Dimensional Accuracy ◽  
3D Modelling ◽  
Content Type ◽  
Minimal Impact ◽  
Speed Up ◽  
Elemental Chemical Analysis ◽  
Original Metal

Purpose This paper aims to present a proposal for the restoration of a silver crown by means of fitting pieces produced by the process of 3D modelling and rapid prototyping. It also analyses the benefits of this procedure in restoration of objects weakened by corrosive processes. Design/methodology/approach Elemental chemical analysis was carried out in the alloy used in the manufacture of the crown and the constructive and corrosive processes present were studied. Three fitting pieces were modelled and prototyped in wax casting by the stereolithography apparatus system aiming to restore the part and protect the original metal against impacts and external tensions which could speed up some deterioration processes. Findings The procedure presented in this paper has shown that formal and dimensional accuracy, only achieved by means of 3D technologies, made the restoration and mechanical stability of the crown possible without the use of adhesives or welding. Originality/value The proposed procedure is a new restoration alternative which causes minimal impact to the object and abides by the main standards for modern conservation. It is made with metal which is compatible with the original piece, retractable and easily identifiable.

scholarly journals Impacts and challenges of Southern African Development Community’s industrialization agenda on Botswana and Tanzania

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kezia H. Mkwizu ◽  
Gladness L. Monametsi
Keyword(s):  
Policy Implementation ◽  
Research Method ◽  
Design Methodology ◽  
Policy Documents ◽  
Content Type ◽  
Minimal Impact ◽  
African Development ◽  
Sub Saharan ◽  
Conference Papers ◽  
Practical Implications

PurposeThis paper aims to explore the impacts and challenges of the Southern African Development Community’s industrialization agenda on the industrialization of two Sub-Saharan African states, Botswana and Tanzania.Design/methodology/approachThe study adopts the documentary research method by carefully analyzing relevant policy documents, conference papers, reports, and journals.FindingsWhile there is an impact on policy provisions targeted towards industrialization, there are challenges such as poor policy implementation that, if not addressed, could dampen efforts by policymakers in achieving the goal of industrializing the countries.Practical implicationsGovernments should ensure equal synergy relations amongst institutions tasked with implementation. Increase investment in research and development (R&D) and human capital as drivers of innovation are needed for industrialization.Originality/valueThis paper adds to the discourse on industrialization. It also highlights challenges faced by countries whose policies have had minimal impact on industrialization.

Change is not just analogue but a data-driven vicious circle

2019 ◽  
Vol 18 (4) ◽  
pp. 150-154
Author(s):  
Charles Hipps
Keyword(s):  
Design Methodology ◽  
Vicious Circle ◽  
Data Driven ◽  
Vicious Cycle ◽  
Content Type ◽  
Talented People ◽  
Speed Up ◽  
Market Needs ◽  
Learning From Others

Purpose Change is no longer an event in HR. Competition is tougher than ever, and this battle for top talent is a vicious cycle that doesn't stop but reinvents itself all the time. The recruitment market needs to be more responsive to the continuous cycle of innovation and recognise the increasingly competitive marketplace that is rapidity getting tighter. Design/methodology/approach With more than 20 years as the founder of a leading recruitment technology vendor, the detail and content supplied in the feature are all of the author’s own thoughts and experiences, drawn from his own expertise and learning from others he has met en route. Findings More often than not, recruitment teams are doing what they have always done – seeing the same candidates and visiting the same events. Change, or more specifically in this case, technology, actually has the ability to speed up the process, enhance the candidate experience and give time back to recruiters to spend with the candidates. Originality/value It is widely known that talented people have higher expectations and opportunities than ever before. That makes it crucial for companies to reach them, deliver a highly engaging candidate experience and nurture a relationship well ahead of open opportunities.

Consumer security behaviors and trust following a data breach

2018 ◽  
Vol 33 (4) ◽  
pp. 425-435 ◽  
Author(s):  
Shelby R. Curtis ◽  
Jessica Rose Carre ◽  
Daniel Nelson Jones
Keyword(s):  
Behavioral Intentions ◽  
Design Methodology ◽  
Personal Responsibility ◽  
Large Impact ◽  
Social Implications ◽  
Content Type ◽  
Minimal Impact ◽  
Personal Security ◽  
Practical Implications ◽  
Security Behaviors

Purpose The purpose of this study was to determine how security statement certainty (overconfident, underconfident and realistic) and behavioral intentions of potential consumers impact the perceptions of companies in the presence or absence of a past security breach. Design/methodology/approach The study exposed participants to three types of security statements and randomly assigned them to the presence or absence of a previous breach. Participants then evaluated the company and generated a hypothetical password for that company. Findings This study found that the presence or absence of a previous breach had a large impact on company perceptions, but a minimal impact on behavioral intentions to be personally more secure. Research limitations/implications The authors found that the presence or absence of a previous breach had a large impact on company perceptions, but minimal impact on behavioral intentions to be personally more secure. Practical implications Companies need to be cautious about how much confidence they convey to consumers. Companies should not rely on consumers engaging in secure online practices, even following a breach. Social implications Companies need to communicate personal security behaviors to consumers in a way that still instills confidence in the company but encourages personal responsibility. Originality/value The confidence of company security statements and presence of a previous breach were examined for their impact on company perception and a novel dependent variable of password complexity.

scholarly journals A study on extruded filament bonding in fused filament fabrication

2019 ◽  
Vol 25 (3) ◽  
pp. 555-565 ◽  
Author(s):  
Ana Elisa Costa ◽  
Alexandre Ferreira da Silva ◽  
Olga Sousa Carneiro
Keyword(s):  
Control Systems ◽  
Design Methodology ◽  
Mechanical Performance ◽  
Tensile Axis ◽  
Dimensional Accuracy ◽  
Fused Filament Fabrication ◽  
Bonding Quality ◽  
Content Type ◽  
Extrusion Rate ◽  
Forced Cooling

Purpose The performance of parts produced by fused filament fabrication is directly related to the printing conditions and to the rheological phenomena inherent to the process, specifically the bonding between adjacent extruded paths/raster. This paper aims to study the influence of a set of printing conditions and parameters, namely, envelope temperature, extrusion temperature, forced cooling and extrusion rate, on the parts performance. Design/methodology/approach The influence of these parameters is evaluated by printing a set of test specimens that are morphologically characterized and mechanically tested. At the morphological level, the external dimensions and the voids content of the printed specimens are evaluated. The bonding quality between adjacent extruded paths is assessed through the mechanical performance of test specimens, subjected to tensile loads. These specimens are printed with all raster oriented at 90º relative to the tensile axis. Findings The best performance, resulting from a compromise between surface quality, dimensional accuracy and mechanical performance, is achieved with a heated printing environment and with no use of forced cooling. In addition, for all the conditions tested, the highest dimensional accuracy is achieved in dimensions defined in the printing plane. Originality/value This work provides a relevant result as the majority of the current printers comes without enclosure or misses the heating and envelope temperature control systems, which proved to be one of the most influential process parameter.

MiFID II: practical implications for high yield bond investors

2018 ◽  
Vol 19 (1) ◽  
pp. 58-62
Author(s):  
Natalia Sokolova ◽  
Tamer Bahgat
Keyword(s):  
Financial Markets ◽  
Financial Services ◽  
Design Methodology ◽  
Bond Market ◽  
High Yield ◽  
Content Type ◽  
Minimal Impact ◽  
Adoption And Implementation ◽  
Practical Guidance ◽  
Practical Implications

Purpose The purpose of this paper is to alert the European high-yield market to several regulatory developments relating to the adoption of markets in financial instruments directive (MiFID) II. Design/methodology/approach Reviews regulatory developments in connection with the MiFID II adoption and implementation, identifies several practical implications for the high-yield market professionals and suggests certain modifications in the banks’ internal protocols and practices that may be required as a result. Findings When the provisions of MiFID II are applied on January 3, 2018, they may have a dramatic impact on global financial markets, including a number of practical implications for the high-yield bond market. The burden of implementing MiFID II will be primarily on banks and brokers with minimal impact on the high-yield issuers. Originality/value Practical guidance from experienced high yield, securities and financial services lawyers.

Mechanical properties of commercial rapid prototyping materials

2014 ◽  
Vol 20 (6) ◽  
pp. 499-510 ◽  
Author(s):  
Jaroslaw Kotlinski
Keyword(s):  
Mechanical Properties ◽  
Rapid Prototyping ◽  
Design Methodology ◽  
Content Type ◽  
Design Engineers ◽  
Mechanical Properties Of Materials ◽  
Properties Of Materials ◽  
Materials Used ◽  
Method Suitability ◽  
Practical Implications

Purpose – This paper aims to relate to the study of mechanical properties of materials used in rapid prototyping (RP). Design/methodology/approach – Comparison of mechanical properties of commercial RP materials. The study of the literature was the essential source of obtaining the results necessary to complete the evaluations and to determine the property ranges. Findings – Specifications of mechanical properties collected in one paper about mechanical properties and anisotropy enable to define limitations for prototype properties. Research limitations/implications – The study is limited to accessible data concerning materials from manufacturers’ offers. Practical implications – The study is particularly useful in the RP methods application. Originality/value – The obtained study of mechanical properties makes a quick analysis possible. This article also includes the guideline for design engineers, which determines RP method suitability to create functional prototypes of the machines. Mechanical properties of materials have been adopted as a criterion.

Characterization of sintered hydroxyapatite samples produced by 3D printing

2014 ◽  
Vol 20 (5) ◽  
pp. 413-421 ◽  
Author(s):  
I. Pires ◽  
B. Gouveia ◽  
J. Rodrigues ◽  
R. Fonte
Keyword(s):  
Phase Stability ◽  
Mechanical Stability ◽  
Sintering Temperature ◽  
Calcium Phosphates ◽  
Complex Structure ◽  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Compression Tests ◽  
Powder Morphology ◽  
Content Type

Purpose – The purpose of this study is to characterize sintered hydroxyapatite (HA) samples produced by three-dimensional printing (3DP). This study is part of a project concerned with the fabrication of calcium phosphates implants by 3DP. However, before considering a more complex structure, like scaffolds or implants, a thorough knowledge of the role played by the sintering temperature on physical and mechanical the properties of porous HA is necessary. Design/methodology/approach – The characteristics of sintered HA samples have been analyzed by means of x-ray diffraction, scanning electron microscope (SEM) and uniaxial compression tests. The 3DP parameters used to produce the HA samples were those who led to higher accuracy and mechanical stability. Findings – Sintering temperature and powder morphology are critical factors influencing densification behavior, porosity, phase stability, mechanical strength and tangent modulus of the HA samples produced by 3DP. This study allowed us to conclude about the 3DP parameters to be used to produce porous HA specimens with the required integrity and dimensional accuracy, and the optimal post-processing sintering temperature which led to the best results in terms of porosity, microstructure, phase stability of HA and mechanical properties. Originality/value – This paper provides a method to evaluate the manufacturability of calcium phosphate models produced by 3DP.

Mechanical isotropy and postcure shrinkage of polydimethylsiloxane printed with digital light processing

2020 ◽  
Vol 26 (8) ◽  
pp. 1447-1452
Author(s):  
Dong Sung (Danny) Kim ◽  
Jakkrit Suriboot ◽  
Chin-Cheng Shih ◽  
Austin Cwiklik ◽  
Melissa A. Grunlan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Design Methodology ◽  
Good Accuracy ◽  
Dimensional Accuracy ◽  
Dimensional Error ◽  
Digital Light Processing ◽  
Content Type ◽  
Post Exposure ◽  
Exposure Conditions

Purpose This paper aims to investigate the printability of photocurable PDMS with digital light processing (DLP) in terms of dimensional accuracy, mechanical properties, isotropy and postcure shrinkage. Design/methodology/approach The photocurable PDMS was made from methacrylated PDMS-macromer and 2,4,6-Trimethylbenzoyldi-Phenylphosphinate (TPO-L) photoinitiator. The PDMS was printed using different orientations, sizes and post-exposure conditions and then evaluated by tensile test and microscope to determine the printability. Findings Printed parts show good accuracy and low shrinkage, but high directionality in modulus, ductility and strength. The dimensional error is less than 2% and the shrinkage rates are less than 0.52%. In contrast, the modulus varies between 0.87 and 0.96 MPa depending on print orientation, elongation varies from 34.7% to 66.4% and strength varies from 0.23 to 0.49 MPa. Originality/value This study quantitatively characterizes the printability of photo curable PDMS with DLP, which has not been reported elsewhere. This paper also discusses the challenges of PDMS printing for future advancement.

Strong prospects for robots in retail

2019 ◽  
Vol 46 (3) ◽  
pp. 326-331 ◽  
Author(s):  
Robert Bogue
Keyword(s):  
Inventory Management ◽  
Design Methodology ◽  
Retail Sector ◽  
Short Introduction ◽  
Content Type ◽  
Hazard Detection ◽  
Business Opportunities ◽  
Speed Up ◽  
Product Delivery ◽  
Insight Into

Purpose This paper aims to illustrate the rapidly growing use of robots in the retail sector by considering a range of products and applications. Design/methodology/approach Following a short introduction, this paper discusses robotic products and deployments in the following applications: inventory management, the provision of customer assistance, cleaning and hazard detection and product delivery. It concludes with a brief discussion. Findings Robots are rapidly making inroads in the retail sector. They have been shown to reduce manpower requirements, improve efficiency, reduce costs and speed-up deliveries. As applications grow and the technologies mature, retail is expected to become a major robot user and will offer significant business opportunities. Originality/value This study provides a detailed insight into the emerging and rapidly developing retail robotics business.

Application of improved complex proportional assessment (COPRAS) method for rapid prototyping system selection

2015 ◽  
Vol 21 (6) ◽  
pp. 671-674 ◽  
Author(s):  
M. A. Makhesana
Keyword(s):  
Decision Making ◽  
Rapid Prototyping ◽  
Design Methodology ◽  
Qualitative Data ◽  
Content Type ◽  
System Selection ◽  
Rapid Prototyping System ◽  
Copras Method ◽  
Simple Flow ◽  
Selection Of

Purpose – The purpose of this paper is to demonstrate the methodology of a decision-making method for selection of rapid prototyping process and comparison of it with previously developed methods. Design/methodology/approach – Here in this work, the methodology of improved complex proportional assessment (COPRAS) method is used which can handle even qualitative data for attributes. Findings – The proposed methodology is useful and can be applied to any kind of decision-making situation. Originality/value – The proposed method provides more effective results as compared to other methods and with a simple flow of analysis.

Sign in / Sign up

Export Citation Format

Share Document