Abderrahmane Baïri, Clara Ortega Hermoso, David San Martén Ortega, Iken Baïri and Zsolt Peter
This work deals with the case of the quad flat non-lead 64 (QFN64) electronic package generating a low power range ranging from 0.01 to 0.1W. It is installed on one side of a…
Abstract
Purpose
This work deals with the case of the quad flat non-lead 64 (QFN64) electronic package generating a low power range ranging from 0.01 to 0.1W. It is installed on one side of a printed circuit board (PCB) that can be inclined relative to the horizontal plane with an angle varying between 0° and 90° (horizontal and vertical positions, respectively). The surface temperature of the electronic assembly is subjected to air natural convection.
Design/methodology/approach
Calculations are done by means of the finite volume method for many configurations obtained by varying the generated power and the inclination angle.
Findings
The distribution of the surface temperature is determined on all the assembly areas (QFN and PCB). The study shows that the thermal behaviour of the electronic device is influenced by the generated power and the inclination angle. The 3D numerical survey leads to correlations allowing calculation of the average surface temperature in any part of the assembly, according to the power generated by the QFN64 and the inclination angle.
Originality/value
The proposed accurate correlations are original and unpublished. They optimize the thermal design of the electronic QFN64 package, which is increasingly used in many engineering fields.
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Attila Géczy, Balázs Illés, Zsolt Péter and Zsolt Illyefalvi‐Vitéz
The purpose of this paper is to present a novel approach on the process zone characterization for direct feedback regarding the state of vapour, in order to assure a better…
Abstract
Purpose
The purpose of this paper is to present a novel approach on the process zone characterization for direct feedback regarding the state of vapour, in order to assure a better monitoring, control and understanding of the process.
Design/methodology/approach
Different pressure sensors were applied in an experimental vapour phase soldering (VPS) station, where the hardware setup was dedicated to the current experiments. Static and dynamic pressure values were analyzed and correlated with additional thermal measurements.
Findings
The results reveal the dynamics of the vapour blanket generation. The correlated measurements show different stages of the process initialization, highlighting better accuracy than sole temperature measurements of saturated vapour identification. It is possible to trace the height of the available saturated vapour blanket with static pressure measurements.
Practical implications
The VPS process may benefit from the more precise saturation detection, giving better control on the heat transfer, enabling more efficient production with the reduction of idle time, and resulting in better soldering quality.
Social implications
Reducing the idle time of the VPS stations may result in better efficiency and smaller power consumption, reducing the environmental impact of the method.
Originality/value
The presented methods provide a completely novel approach from the aspect of process zone state variables and parameters characterization, focusing on pressure measurements.
Details
Keywords
Organizational innovation, leading change, customer service management in professional service firms.
Abstract
Subject area
Organizational innovation, leading change, customer service management in professional service firms.
Study level/applicability
Advanced undergraduate, MBA/executive education.
Case overview
This case describes the human resource (HR) dilemma faced by BDO Hungary in 2010, an international audit and tax consulting partnership, operating in the country since 1989. In order to continue its past growth story and to reach closer to “Big Four” BDO has to enter new business segments, offer more services to its existing customers and seize higher value-added business potentials. The new strategy, however, is challenged by its incumbent, traditional core business: auditing, which is highly regulated by ethical, legal, and professional standards including non-advertisement regulations to which the resulting organizational culture and HR routines are congruent. The case is described from the perspective of the Equity Partner, HR Director and Executive MBA student, who is tasked with a new HR plan for training and development and is charged with implementing it successfully. How best to adjust current training and development policies to the best meet new strategic growth goals? How to develop existing human capital? How to make employees more commercially oriented in such a conservative, risk averse, and highly regulated environment? How to improve their customer service and the sales skill?
Expected learning outcomes
Exploring the importance of training and development in improving customer service levels in professional service firms operating in emerging markets. Understanding the limitations and the possibilities of transferring international HR policies and standards across borders and cultural differences.
Supplementary materials
Teaching notes.
Details
Keywords
Zoltán Schepp and Mónika Mátrai-Pitz
Over the last decade, foreign currency indebtedness in Hungary has become a systemic financial problem, and its crippling impact on the real economy has been aggravated by its…
Abstract
Over the last decade, foreign currency indebtedness in Hungary has become a systemic financial problem, and its crippling impact on the real economy has been aggravated by its significant constraints on economic policy. In international comparative terms, however, there are certain specific features relating to Hungary which make this issue particularly problematic, and during the financial crisis both exchange rates and interest rates were important factors in increasing the burden on individual households. We present here a case study whereby our research focuses on the causes and determining factors of the pricing of Swiss franc-denominated mortgage loans. Our empirical exercise examines four potential price shocks which might have affected the pricing decisions of credit institutions: foreign currency interest rates, the country risk premiums (measured by Credit Default Swap (CDS) spread), the deteriorating quality of the loan portfolio and the taxes levied on banks. The questions which arise concern the relationship of these costs to the changes in interest rates and the extent to which these cost shocks were passed on by banks to their clients. Empirical evidence based on Vector Error Correction Model (VECM) shows a significant long-run relationship between cost factors and CHF denominated mortgage loans interest rates — with a reasonable sign and magnitude of parameters, but also with moderate forecasting power. Finding a tractable solution to the foreign currency debt trap is only possible if a fair distribution of burdens is achieved, and this should be supported by empirical facts. At the end of the day, all three affected parties (debtors, banks, and the Hungarian State) had made their contribution, but how fair and reasonable the distribution was remains an open issue for further research.
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Kan Jiang, Dailan Zhou, Xiaoning Bao and Silan Mo
Considering that when endorsing the same product, virtual influencers with different identity types (self-created, collaborative) can have different impacts on consumers'…
Abstract
Purpose
Considering that when endorsing the same product, virtual influencers with different identity types (self-created, collaborative) can have different impacts on consumers' purchasing behaviors, this paper aims to explore how to maximize the impact effects of the VIs' respective identities. It provides companies with new perspectives on endorsement strategies.
Design/methodology/approach
The interaction between VI identity type and post type (informational, storytelling) on purchase intention was analyzed in four experiments (N = 1,007), considering informational and normative social influence as intermediate mechanisms and consumer self-construal as moderators.
Findings
The findings show that self-created VI is suited to informational posts and collaborative VI to storytelling posts. This identity-content match effectively triggers the social influence mechanism: informational posts of self-created VI significantly enhance informational social influence. In contrast, storytelling posts of collaborative VI primarily stimulate normative social influence. Consumer self-construal also moderates the process of influencing mechanisms.
Originality/value
Based on social influence theory and matching theory, this paper confirms the existence of an interaction between VI identity types, which influences consumers' purchase intention through informational and normative social influence. This finding fills the research gap in the field of VI endorsement strategy. It also emphasizes the importance of consumer self-construal and contributes new insights into the related field.
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Olivér Csernyava, Bálint Péter Horváth, Zsolt Badics and Sándor Bilicz
The purpose of this paper is the development of an analytic computational model for electromagnetic (EM) wave scattering from spherical objects. The main application field is the…
Abstract
Purpose
The purpose of this paper is the development of an analytic computational model for electromagnetic (EM) wave scattering from spherical objects. The main application field is the modeling of electrically large objects, where the standard numerical techniques require huge computational resources. An example is full-wave modeling of the human head in the millimeter-wave regime. Hence, an approximate model or analytical approach is used.
Design/methodology/approach
The Mie–Debye theorem is used for calculating the EM scattering from a layered dielectric sphere. The evaluation of the analytical expressions involved in the infinite sum has several numerical instabilities, which makes the precise calculation a challenge. The model is validated through an application example with comparing results to numerical calculations (finite element method). The human head model is used with the approximation of a two-layer sphere, where the brain tissues and the cranial bones are represented by homogeneous materials.
Findings
A significant improvement is introduced for the stable calculation of the Mie coefficients of a core–shell stratified sphere illuminated by a linearly polarized EM plane wave. Using this technique, a semi-analytical expression is derived for the power loss in the sphere resulting in quick and accurate calculations.
Originality/value
Two methods are introduced in this work with the main objective of estimating the final precision of the results. This is an important aspect for potentially unstable calculations, and the existing implementations have not included this feature so far.
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Two members of ISHM‐Hungary, Professor Zsolt Illyefalvi‐Vitéz, ELC representative, and Professor Gábor Harsányi, president and TPC representative, attended the NATO Advanced…
Abstract
Two members of ISHM‐Hungary, Professor Zsolt Illyefalvi‐Vitéz, ELC representative, and Professor Gábor Harsányi, president and TPC representative, attended the NATO Advanced Research Workshop on MCM‐C/Mixed Technologies in Florida, USA, in May co‐sponsored by ISHM‐US and organised by:
Colin C. Williams, Sara Nadin and Peter Rodgers
Since the turn of the millennium, a small corpus of post‐structuralist thought has emerged that challenges the dominant belief that capitalism is now hegemonic and that all…
Abstract
Purpose
Since the turn of the millennium, a small corpus of post‐structuralist thought has emerged that challenges the dominant belief that capitalism is now hegemonic and that all economic formations are contrasting varieties of capitalism. This paper seeks to contribute to the development of this emergent perspective. The aim is to challenge the notion that the Ukrainian economy can be represented as some variety of capitalism by highlighting the shallow permeation of capitalist practices into daily life and the continuing prevalence of multifarious non‐capitalist economic practices.
Design/methodology/approach
To achieve this, evidence is here reported from a 2005‐6 survey that analysed the extent to which 600 households in Ukraine used capitalist and non‐capitalist economic practices in their coping tactics.
Findings
This reveals not only the limited use of capitalist practices in the everyday coping tactics of households in Ukraine but also how an array of non‐capitalist economic practices remain heavily relied on by a majority of households to secure their livelihood. The outcome is a call to tentatively reject the “varieties of capitalism” system of meaning because of what it excludes, prohibits and denies, and to open up the future of post‐Soviet Ukraine to other possible trajectories than simply some variety of capitalism.
Research limitations/implications
This snapshot survey of the everyday coping practices of households displays only that capitalist practices are not hegemonic and that multifarious economic relations persist and are widespread. It does not show whether or not there is movement towards greater reliance on capitalist practices.
Originality/value
It begins through the presentation of evidence on Ukraine to tentatively challenge the application of a “varieties of capitalism” perspective towards Central and Eastern European economies.
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Vojtěch Heřmanský, M. Bilinski, H. Binner, Joon Lee, Dave Lowrie and M. Whiteside
The members of the chapter at the annual meeting held on 27 November 1992 in Brno decided not to split after the separation of Czechoslovakia. It was suggested to organise a…
Abstract
The members of the chapter at the annual meeting held on 27 November 1992 in Brno decided not to split after the separation of Czechoslovakia. It was suggested to organise a larger chapter from the Central European States to provide greater co‐operation and better functioning of the smaller chapters. A new name for the chapter was proposed — Central European Chapter (CEC) — to express neutrality and to point out that the chapter is open to other neighbouring chapters and to new members from the states where no national chapter yet exists.
The International Society for Hybrid Microelectronics invites the submission of technical papers for presentation at the above event. All original unpublished papers on…
Abstract
The International Society for Hybrid Microelectronics invites the submission of technical papers for presentation at the above event. All original unpublished papers on microelectronics related topics are welcomed.