T.J. Ennis, N. Brady, B. Keane and A. Donnelly
The effects of varying reflow profiles on the tensile pull strength and structure of solder joints of components with tin plated and nickel‐palladium plated leads were studied. It…
Abstract
The effects of varying reflow profiles on the tensile pull strength and structure of solder joints of components with tin plated and nickel‐palladium plated leads were studied. It was found that, in the case of tin plated leads, the structure and the tensile pull strength of the resultant solder joints were not significantly affected by varying the reflow conditions from Profile 1 (peak temperature range: 174°C to 195°C, reflow time 24 seconds) and Profile 2 (peak temperature range: 198°C to 218°C, reflow time 30 seconds). On the other hand, the mean pull strength of solder joints of nickel‐palladium plated lead was found to be significantly higher for joints reflowed with profile 2 than that of joints reflowed with Profile 1. Also, for both reflow profiles, the pull strengths of joints of nickel‐palladium plated leads were significantly higher than those of tin plated leads. This higher average pull strength may be due to the dissolution of palladium in the solder and/or the increased density of intermetallic precipitates in the solder fillet, and the increased intermetallic layer thickness at the lead/solder interface.
N. Brady and T.J. Ennis
Tensile pull strength tests were used to study the strength of solder joints of 25 mil gull wing leads on 132 pin quad flat pack components. The authors generated quadratic and…
Abstract
Tensile pull strength tests were used to study the strength of solder joints of 25 mil gull wing leads on 132 pin quad flat pack components. The authors generated quadratic and linear models which can be used to predict the pull strength of a solder joint given its geometry. The shape parameters studied were stand‐off height between the lead and substrate, height of heel fillet, radius of curvature of heel fillet, length of heel fillet, height of solder at toe region, and thickness of solder on the lead. The most significant parameters in determining the tensile pull strength of the solder joint are the height and length of the heel fillet. A study was performed to quantify the effect of lead finish on the accuracy of these models. The lead finish was found to have a significant effect on the solder joint strength. The effect of lateral misregistration on the tensile pull strength of solder joints was also investigated. No correlation between the extent of lateral misregistration and joint pull strength has been found.
Colin Lea and Bob Willis
The UK is a leader in the implementation of surface mount technology, and SMARTEX '91 sponsored by the SMART Group is one of only a few shows organised worldwide which is…
Abstract
The UK is a leader in the implementation of surface mount technology, and SMARTEX '91 sponsored by the SMART Group is one of only a few shows organised worldwide which is dedicated solely to this field. Perhaps it was not surprising then that this year's three‐day event proved a great success.
– The purpose of this paper is to propose a model to increase the efficiency and effectiveness of metaphor when used in financial news media reporting.
Abstract
Purpose
The purpose of this paper is to propose a model to increase the efficiency and effectiveness of metaphor when used in financial news media reporting.
Design/methodology/approach
Theory in Cognitive Linguistics, Conceptual Metaphor Theory and Frame Semantics are used to demonstrate metaphor’s central role shaping human thought and understanding, producing conceptual frameworks used to understand abstract concepts in not only financial news media but also all human discourse. The deontological principles of the major financial news sources are presented which demonstrate a commitment to common core principles, such as “balance” and “accuracy”, yet few consider the potential role of metaphor toward achieving them. This research presents a minimum source domain model for describing stock market phenomenon to increase “interpretation reliability” based on the concepts of communicative efficiency and effectiveness.
Findings
This research presents a model for communicative efficiency and effectiveness of metaphor and metonymy (CEEMM) in financial reporting by presenting a minimum source domain model for describing stock market phenomenon to increase “interpretation reliability” when metaphor is used in financial news media sources.
Research limitations/implications
While evidence for the role of metaphor and metonymy on behavior has been provided and in economic contexts, more research into the role that it plays in financial news media and the dynamics of how it influences consumer decisions is necessary.
Practical implications
CEEMM provides news media sources with a tool for standardizing the modes they use to semantically create and communicate knowledge of the stock market and stock market phenomenon. Reporting on stock market phenomenon will have, for the first time, objective parameters for using metaphor toward the fulfillment of journalism deontological principles.
Social implications
CEEMM has the potential to increase clarity in the metaphors used, as they require less creative exploration on the part of readers. This results in greater levels of trust in news media sources and permits news consumers to make more well-informed financial decisions, as their perceptions of events will be less subjective to creative interpretation. This research should urge news media companies to publicly declare principles for metaphor and metonymic practice in their communication of financial data.
Originality/value
The paper presents the first model for increasing the communicative efficiency and effectiveness in the use of metaphor in financial news media.
Details
Keywords
The purpose of the work is to investigate the feasibility of using anisotropically conductive adhesives to join surface‐mount devices as solder replacement. The results from a…
Abstract
The purpose of the work is to investigate the feasibility of using anisotropically conductive adhesives to join surface‐mount devices as solder replacement. The results from a literature and market survey are reported. Based on industrial demands, two anisotropically conductive adhesives were chosen for the experimental work. During the experimental work, the conductive adhesive joints were produced at various curing conditions. The joints were characterised by shear testing and electrical resistance measurement after ageing at 20, 70 and 120°C to 1000 hours. Optical and scanning electron microscopy were used to characterise the adhesive joints. In addition to this, temperature cycling tests, humidity test and pull tensile tests were used to qualify the adhesive joint reliability and quality. From the results of the present work, it can be concluded that the anisotropically conductive adhesive A joints are stable in the 85°C/85% RH environment and therefore have better corrosion resistance than adhesive B joints. Neither of the adhesives can pass temperature cycling from −55 to 125°C for 1000 cycles according to military standard 883C.
The purpose of the paper is to demonstrate how a generic value chain and customer focused system as demonstrated by the Scottish and Irish breast screening programmes can be used…
Abstract
Purpose
The purpose of the paper is to demonstrate how a generic value chain and customer focused system as demonstrated by the Scottish and Irish breast screening programmes can be used to provide a high quality health service.
Design/methodology/approach
Literature relevant to aligning the entire operating model – the companies' culture, business processes, management systems to serve one value discipline, i.e. customer intimacy, is reviewed and considered in the context of the NHS Scottish Breast Screening Programme in Edinburgh and BreastCheck – the National Breast Screening Programme in Ireland.
Findings
This paper demonstrates how an emphasis on customer focus and operational excellence, as used in other service industries, can help to provide a better health service. It uses the Scottish and Irish breast screening programmes as illustrative examples. The paper applies the key requirements in the delivery of a quality service including an understanding of the characteristics of a service industry, the management of discontinuities involved in its delivery and the environment in which it operates.
Originality/value
System failure is commonly the cause of quality failure in the health system. Breast screening programmes are designed to prevent such a failure. This paper promotes and describes the use of the generic value chain by using the knowledge gained in delivering a mammography‐screening programme.
Details
Keywords
Evi Sifaki and Annabelle Mooney
The purpose of this paper is to document the conceptual metaphors (Lakoff and Johnson, 2003) found in the talk of Greek and Australian adults to describe how people think about…
Abstract
Purpose
The purpose of this paper is to document the conceptual metaphors (Lakoff and Johnson, 2003) found in the talk of Greek and Australian adults to describe how people think about money. As money becomes increasingly abstract, understanding money, dealing with debt and encouraging financial literacy become more problematic.
Design/methodology/approach
Semi-structured interviews of a small sample (n = 7) are analysed using Lakoff and Johnson’s model of metaphor to map the underlying conceptual structures of money.
Findings
This paper argues that the abstraction of money has led people to search for a conceptual object. The forms and features of this object are recovered by tracing the metaphors, their presuppositions and entailments. This shows that people think about money as a physical object that needs to be carefully managed to avoid bodily harm and personal physical discomfort. Specifically, money is an object with weight that physically constrains the body, a substance that can be addictive albeit with the agentive capacity of sentient beings.
Social implications
While the physical and corporeal nature of money implicitly underpins existing money management techniques (e.g. “jam jar” accounts), a detailed understanding of money as a (conceptual) object provides detailed discursive, lexical and persuasive resources for promoting sound financial behaviour and perhaps informing both economic and social policies.
Originality/value
While metaphor has been studied in economics texts, very little attention has been paid to the language that ordinary people use to talk about money. This research gives a clear picture of money as a metaphorically physical object.
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Keywords
Critical thinking is a challenging term to describe but considered necessary for academic achievement, success in the global job market, and essential in developing a life-long…
Abstract
Critical thinking is a challenging term to describe but considered necessary for academic achievement, success in the global job market, and essential in developing a life-long learner (Dwyer, Hogan, & Stewart, 2012). Many definitions exist, but some of the components include the ability to analyse, reflect, judge, and strategise in a systematic way, to be able to solve problems (Dwyer et al., 2012). Some of the definitions, taxonomies, models, and theories of critical thinking have been built by Western culture, and the United States contributes information towards this Western approach (Nicholas & Raider-Roth, 2016; Wang, 2017). These definitions, taxonomies, models, and theories make a significant contribution to the pedagogical approaches to the teaching of critical thinking in the United States. This chapter details the structures that support the definitions of critical thinking and the history of the connections between critical thinking and classroom instruction in the United States.
Critical thinking is a necessary construct for twenty-first century learning and discussed in scholarly professional literature and popular media (Dwyer, 2017). The term is a part of the twenty-first century four Cs of learning: collaboration, communication, creativity, and critical thinking (Cunningham, 2018). The teaching of critical thinking can be challenging, and this chapter presents an overview of some helpful pedagogical approaches, including project-based learning, project-based design, e-learning, and active learning and descriptions of instructional pedagogy including the general, infusion, immersion, and mixed approaches (Abrami et al., 2008; Dwyer, 2017; Ennis, 1989; Marin & Halpern, 2011; Willingham, 2008). Quality assurance is an essential component in ensuring pedagogical approaches to critical thinking are effective. The contribution of core standards in the teaching of critical thinking in the United States will be discussed.