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1 – 10 of over 1000Amalgams, which are mechanically alloyed mixes of a liquid metal with a powder, offer advantages in situations where large devices are to be bonded to materials with significant…
Abstract
Amalgams, which are mechanically alloyed mixes of a liquid metal with a powder, offer advantages in situations where large devices are to be bonded to materials with significant coefficient of expansion differences or where extremely temperature‐sensitive devices are to be bonded. This is because these materials will set or harden at or near room temperature to yield hard metallic bonds with melting points from 280°C up to ∼600°C depending upon the systems used. In this paper the results of a survey study of three binary systems of gallium with copper, nickel and silver are described. Wetting characteristics, bond strengths with and without metallisation, bulk properties including electrical and thermal properties and thermal cycle performance of joints are described. The feasibility of using these materials for bonding metallised and unmetallised surfaces of a variety of ceramics and semiconductors is clearly demonstrated.
A feasibility study into alternative methods of producing interconnection between a PCB and flip‐chip has been undertaken. A number of initial ideas were investigated, the least…
Abstract
A feasibility study into alternative methods of producing interconnection between a PCB and flip‐chip has been undertaken. A number of initial ideas were investigated, the least promising being discarded at an early stage, while the ideas showing the greatest chance of success were subject to a more rigorous examination. Of the initial ideas the most promising were amalgam materials and magnetic alignment of ferromagnetic particles. These two ideas were combined to produce a new type of anisotropic conducting adhesive (ACA), which may have the potential to overcome problems owing to co‐planarity issues and have the ability to form fine pitch metallurgical bonds. In order to promote bonding, amalgam compositions that enhance surface wetting, while retaining good mechanical properties have been investigated. The possibility of incorporating liquid/semi‐solid metallic interconnects, within the ACA, which will retain contact during the thermal expansion of the polymeric materials was also explored. During the course of the study, various techniques such as DSC and SEM have been used to characterise thermal stability of Ga‐based alloys and discrepancies with current phase diagrams have been found.
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Bruce Fortado and Paul A. Fadil
The purpose of this study was to explore the introduction of a “sales culture” at one of the ten largest US banks. Identifying and analyzing the existing human relations problems…
Abstract
Purpose
The purpose of this study was to explore the introduction of a “sales culture” at one of the ten largest US banks. Identifying and analyzing the existing human relations problems should enable constructive competitive improvements to be made in the future.
Design/methodology/approach
The major findings of our interviews with tellers and customer service representatives are compared to how the managers presented the sales culture, as well as the relevant cultural literature. The metaphor of the yin and the yang will be used to shed light on the tense and fluctuating interconnection of certain phenomenon.
Findings
Amalgam Bank’s sales did increase, but unanticipated problems also surfaced. The new sales duties slowed service and irritated customers. The teller referral quota proved unrealistic. The sales incentive point system provided little motivation. The negative tended to be stressed in sales meetings. When employees raised concerns, their managers replied with silencing behaviors. Further, there were double standards, lessened career opportunities and some inconsistent managerial practices. Increased turnover and resistance ensued. Addressing these problems should bring the parties’ interests into better balance and produce a more stable and competitive culture.
Research limitations/implications
Doing a comparative analysis can confirm what aspects of the sales culture literature are relevant and where inductive modifications might be called for. Consideration needs to be given to what results might be due to a poor managerial implementation, and what results can be attributed to the conflicting aspects of the original service-oriented culture and the new sales culture. More fieldwork needs to be done to provide confirmation for these findings and expand upon them.
Practical implications
Both theory and practice could be improved by integrating material from anthropology, sociology, human relations, organization culture and marketing.
Social implications
This paper focused on the social issue of culture change. Utilizing competitiveness as an outcome variable, the social implications of this study are tremendous.
Originality/value
This study goes back to the roots of the Human Relations movement: fieldwork. In an era where most scholars hand out surveys and analyze corresponding numbers, the current authors actually went out in the field and meticulously interviewed the subjects. This increased the quality and depth of the survey, while providing a true barometer of the reaction to the proposed culture change. Although this method of study is not original, it is hardly ever done anymore in a “survey-driven” research environment. This fieldwork methodology is one of the most important contributions of this paper.
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Satya R. Chakravarty, Nachiketa Chattopadhyay, Joseph Deutsch, Zoya Nissanov and Jacques Silber
A recent trend in the study of poverty is to consider a relative poverty line, one that is responsive to the nature of the income distribution. We develop an axiomatic approach to…
Abstract
A recent trend in the study of poverty is to consider a relative poverty line, one that is responsive to the nature of the income distribution. We develop an axiomatic approach to the determination of an amalgam poverty line. Given a reference income (e.g., the mean or the median), the amalgam poverty line becomes a weighted average of the absolute poverty line and the reference income, where the weights depend on the policy maker’s preferences for aggregating the two components. The paper ends with an empirical illustration comparing urban and rural areas in the People’s Republic of China and India.
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Abdollah Afshar, Mohsen Shirazi, Masoud Rahman and Esmaeil Fakheri
The purpose of this paper is to evaluate the galvanic corrosion of nitinol orthodontic wires with six dental alloys in artificial saliva and consider the effect of initiated…
Abstract
Purpose
The purpose of this paper is to evaluate the galvanic corrosion of nitinol orthodontic wires with six dental alloys in artificial saliva and consider the effect of initiated localized corrosion and real surfaces of anode and cathode on galvanic current.
Design/methodology/approach
Linear polarization and cyclic polarization curves for each alloy in de‐aerated Duffo and Castillo's artificial saliva are obtained. Galvanic corrosion investigation is conducted by polarization curve intersection and mixed potential theory methods. In order to verify the initiation of localized corrosion, scanning electron microscopy is used.
Findings
Initiation of localized corrosion on the anode increases the galvanic current up to 45 times and therefore considering the effect of localized corrosion on galvanic corrosion is necessary. Placing stainless steel brackets or Aristaloy amalgam in direct contact to nitinol arch wire is not recommended.
Originality/value
In order not to underestimate the galvanic corrosion between two alloys, it is recommended to consider the effects of localized corrosion and anode/cathode surface area ratio. In this paper, an electrochemical method for estimating these factors is proposed.
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Mohamad Mahathir Amir Sultan, Choo Ta Goh, Sharifa Ezat Wan Puteh and Mazlin Mokhtar
Mercury is widely used in medical and healthcare facilities as dental amalgam, mercury-added medical devices, thiomersal-containing vaccines, laboratory analysis and for other…
Abstract
Purpose
Mercury is widely used in medical and healthcare facilities as dental amalgam, mercury-added medical devices, thiomersal-containing vaccines, laboratory analysis and for other general applications despite the hazards. Various agencies consistently promote mercury-free medical facilities through mercury-free alternatives and better management practices, which are in line with the Minamata Convention on Mercury that aims to protect human health and environment from anthropogenic mercury release. The paper aims to discuss these issues.
Design/methodology/approach
The authors conducted a gap analysis on recommended practices gathered from the literature and current practices gathered through semi-structured interviews with Malaysian medical personnel. A life cycle approach was adopted covering mercury use: input, storage, handling, accident, waste disposal and governance phases.
Findings
The authors found that there are significant gaps between recommended and current mercury management practices. Analysis indicates improper mercury management as the main contributor to these gaps. The authors found from recommended practices that core components needing improvement include: mercury management action plan, mercury use identification team, purchasing policy, proper guidelines and monitoring systems.
Practical implications
This study helps us to understand mercury management practices and suggests essential steps to establish a mercury-free medical facility.
Originality/value
This study explored the gaps between recommended and current mercury management practices in a medical facility and contributes to the Minamata Convention on Mercury aspirations.
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Marco Baldan, Alexander Nikanorov and Bernard Nacke
Most of optimal design or control engineering problems present conflicting objectives that need to be simultaneously minimized or maximized. Often, however, it is a priori known…
Abstract
Purpose
Most of optimal design or control engineering problems present conflicting objectives that need to be simultaneously minimized or maximized. Often, however, it is a priori known that some functions have greater importance than other. This paper aims to present a novel multi-surrogate, multi-objective, decision-making (DM) optimization algorithm, which is suitable for time-consuming simulations. Its performances have been compared, on the one hand with a standard decision-making algorithm (iTDEA), on the other with a self-adaptive evolutionary algorithm (AMALGAM*). The comparison concerns numerical tests and an optimal control task in induction heating.
Design/methodology/approach
In particular, the algorithm makes use of surrogates (meta-models) to concentrate the field evaluations at the most promising areas of the design space. The effect of the decision-maker is instead to drive the search to given regions of the Pareto front. The synergy between surrogates and the decision-maker leads to a greater effectiveness of the optimization search. For the field analysis of the optimal control task, a coupled electromagnetic-thermal FEM model has been developed.
Findings
The novel algorithms outperform both iTDEA and AMALGAM* in all done tests.
Practical implications
The algorithm could be applied to other computationally intensive multi-objective real-life problems whenever a preference between the objectives is known.
Originality/value
The combination of surrogates and a decision-maker is beneficial with time-consuming multi-objective optimization problems.
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Short-term military simulations of scenarios or conditions that U.S. military personnel might meet are generally the largest, in terms of cost and personnel, of all operational…
Abstract
Short-term military simulations of scenarios or conditions that U.S. military personnel might meet are generally the largest, in terms of cost and personnel, of all operational training events. That at least six such exercises were scheduled for September 11, 2001 raises serious questions about whether or not the events of 9/11 were at least partially orchestrated by U.S. command.
In light of the aforementioned military exercises and the fact that the 9/11 Commission's Final Report barely mentions them, neither were they significantly discussed nor investigated during the hearings, this essay briefly explores four key questions that will hopefully stimulate further inquiries, investigations and perhaps subpoenas that will ultimately break the silence and force declassification of the information surrounding the war games.1.Has there been a high-level suppression of information about the military drills?2.Might the military drills have been a significant factor in the success of the attacks?3.Who was in charge of the military drills and what motives may have been operating for this person?4.In what way might Zacarias Moussaoui, the only person charged in the United States for the attacks, be a link that connects to the person in charge of the games to another tragedy that may have been “an inside job” – i.e. Senator Paul Wellstone's death, and how might Moussaoui connect all of this to the Pentagon?
By construction, income inequality measures employed in well-being analysis presume all individual differences to be deleterious to the social good. Yet some differences, for…
Abstract
By construction, income inequality measures employed in well-being analysis presume all individual differences to be deleterious to the social good. Yet some differences, for example, those acceptable to all and necessary for optimal resource allocation in producing that well-being, are demonstrably beneficial. Measured inequality is an amalgam of both deleterious or ‘Bad’ and beneficial or ‘Good’ differences, and from both policy and well-being measurement perspectives, distinguishing between types with measures fit for purpose makes sense, especially if the types are taking different paths. Here, as an exemplar, the distinction is explored in considering the progress of human resource, gender, and immigrant status-based personal income differences in twenty-first-century Canada. Categorising human resource-based differences as efficiency promoting ‘Good’ inequalities and gender and immigrant status-based differences as discriminatory and ‘Bad’ reveals that, under all proposed measures, while aggregate and ‘Good’ inequality grew over the sample period, ‘Bad’ inequality diminished, reinforcing the case for inequality measures that are fit for purpose.
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Kevin Haines and Joram Tarusarira
Universities expose higher education professionals to complex organisational environments, expecting them to comply with structures, policies and practices. A university is not so…
Abstract
Universities expose higher education professionals to complex organisational environments, expecting them to comply with structures, policies and practices. A university is not so different in this respect from other Communities of Practice (Wenger, 1998), in which the pressures to conform are often greater than the inducement to be original, and in which being different may be implicitly discouraged. The relationship between the individual and the established power structures becomes even more complicated when a university is going through the transitions and challenges that are inherent to internationalisation. This chapter examines the challenges and opportunities experienced by academics who are cultural and linguistic outliers within the setting of a European university, showing how the assumptions, values and expectations of the university environment can affect individuals’ ability to perform agentically. We consider how these academic outliers make meaning of being professional within the context of internationalisation and consider how such efforts can contribute to new understandings of interculturality. We further examine how alternative ways of being can result in new modes of engagement with colleagues. Drawing on interviews with six academics within a single institution, this chapter offers a version of the truth that is ‘woven from an amalgam of raw data’ (Clough, 2002), resulting in an exploratory narrative in the voices of fictionalised protagonists.
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