Dániel Straubinger, Attila Géczy, András Sipos, András Kiss, Dániel Gyarmati, Oliver Krammer, Dániel Rigler, David Bušek and Gábor Harsányi
This paper aims to present a novel approach on investigating critical current densities in the solder joints of chip-size surface-mounted components or device (SMD) components and…
Abstract
Purpose
This paper aims to present a novel approach on investigating critical current densities in the solder joints of chip-size surface-mounted components or device (SMD) components and ball grid array (BGA) lead-free solder joints with the focus of via-in-pad geometries. The investigation involves a numerical approach and a physical validation with selected geometry configurations and high current loads to reveal possible failure sources. The work is a continuation of a previous study.
Design/methodology/approach
Current density was investigated using finite element modeling on BGA joints. Dummy BGA components, 0402 and 0603 zero ohm jumper resistors, were used, both in daisy chain setups on standard FR4 printed circuit boards (PCBs). Respective physical loading experiments were set to find effects of elevated current density at hot zones of the joints. Cross-section analysis, scanning electron microscopy and shear force tests were used to analyze the joints.
Findings
The findings reveal alterations in the joints, while the current loading is not directly affecting the structure. The modeling reveals the current density map in the selected formations with increased current crowding zones. Overall, the degradation does not reach the level of electromigration (EM)-induced voiding due to the limiting factor of the FR4 substrate.
Practical implications
The heavy current load affects joint reliability, but there are limitations of EM-induced failures on PCB-based assemblies due to the thermomechanical weakness of the FR4 material.
Originality/value
The experiments investigate current density from a novel aspect on frequently used BGA surface mounted components with modeling configurations focusing on possible effects of via-in-pad structure.
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Companies over the world faced several risks related to the COVID-19 crisis. However, when quoting those risks, it is common to mix up pandemic effects with general consequences…
Abstract
Companies over the world faced several risks related to the COVID-19 crisis. However, when quoting those risks, it is common to mix up pandemic effects with general consequences of work at home or the use of electronic communication channels. At the same time, a lot of indirect effects of the crisis are not straightforward, and some consequences may only turn evident in the long term. This chapter collects different appearances and implications of the risk caused by the epidemic based on literature review, questionnaires, in-depth interviews, and expert panels with a particular emphasis on the findings from Hungary. The authors conclude that risk effects differ little across countries but rather widely across industries and individuals. The risk map presented clarifies critical connections and offers a structured overview for the first time in the literature. A better understanding of the risk effects may assist managers and regulators when another similar crisis would emerge in the future.
In this chapter, Andrea Óhidy provides an overview of some central issues of the book. First, she shows the similarities in the challenges to increase the participation and…
Abstract
In this chapter, Andrea Óhidy provides an overview of some central issues of the book. First, she shows the similarities in the challenges to increase the participation and success of Roma people in education and lifelong learning in the selected European countries; then, she discusses their policies and support programmes, which, on the one hand, try to improve the social situation of the Roma while promoting minority language and culture, on the other hand. She finds the reason for their similarities regarding the wording, defining and communicating and also concerning the main ideas and concrete projects for possible solutions, in the Roma inclusion policy of the European Union in the frame of the Open Method of Coordination, which has been introduced within the Lisbon Strategy, linked to the idea of lifelong learning. She considers the realisation of these policy measures at national, regional and local levels to have shown only unsatisfactory results until now.
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Anna Zubor-Nemes, József Fogarasi, András Molnár and Gábor Kemény
The purpose of this paper is to investigate the role of crop insurance among Hungarian crop farmers and the responses to the introduction of the two-scheme risk management system…
Abstract
Purpose
The purpose of this paper is to investigate the role of crop insurance among Hungarian crop farmers and the responses to the introduction of the two-scheme risk management system. Specifically, first, it examines the economic and environmental factors affecting the willingness of farmers to contract crop insurance. Second, it reveals the relationship between having crop insurance and technical efficiency of crop producing farms.
Design/methodology/approach
Probit models of panel data are applied to explore the factors of insurance decisions. The relationship between efficiency and insurance is investigated with two-stage data envelopment analysis (DEA) model with double bootstrap using panel data for the 2001 to 2014 period.
Findings
The results of Probit model estimations show that the education, the size, the indebtedness of crop producing farms and the new two-scheme risk management system are in positive correlation, while the concentration of farming activity are in negative correlation with the crop insurance contracting. The estimations of two-stage DEA model reveal that crop producing farms with an agricultural insurance contract are more efficient than the farmers without using this risk management tool.
Originality/value
Empirical investigation of the influencing factors of agricultural insurance demand in Hungary and the examination of the relationship between insurance and technical efficiency may contribute to the development of Hungarian risk management system.
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Anna Róza Varga, Norbert Sipos, Andras Rideg and Lívia Lukovszki
The purpose of this paper is to identify the differences between Hungarian family-owned businesses (FOBs) and non-family-owned businesses (NFOBs) concerning the elements of SME…
Abstract
Purpose
The purpose of this paper is to identify the differences between Hungarian family-owned businesses (FOBs) and non-family-owned businesses (NFOBs) concerning the elements of SME competitiveness and financial performance.
Design/methodology/approach
The research covers the Hungarian data set of the Global Competitiveness Project (GCP, www.sme-gcp.org) of 738 (data collection between 2018 and 2020) non-listed SMEs, of which 328 were FOBs. The study uses the comprehensive, multidimensional competitiveness measurement of the GCP built on the resource-based view (RBV) and the configuration theory. Financial performance was captured with two composite indicators: short-term and long-term financial performance (LTFP). The comparative analysis between FOBs and NFOBs was conducted using binary logistic regression.
Findings
The results show that FOBs are more prone to focusing on local niche markets with higher longevity and LTFP than NFOBs. However, FOBs have lower innovation intensity and less organised administrative procedures. The most contradicting finding is that the FOBs’ higher LTFP is accompanied by significantly lower competitiveness than in the case of NFOBs.
Originality/value
This study goes beyond other GCP studies by including composite financial performance measures among the variables examined. The combination of performance-causing (resources and capabilities) and performance-representing (financial performance) variables provides a better understanding of the non-listed SMEs in terms of family ownership. The results help academia to enrich the RBV-competitiveness, the non-listed SME management and finance literature, and policymakers to design business development and support schemes. They also show future entrepreneurs the impact of family ownership on entrepreneurial success.
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In Hungary, soon after the democratic transition in 1989/1990, the institution of the general ombudsman was established, based on the Swedish model, possessing broad oversight…
Abstract
In Hungary, soon after the democratic transition in 1989/1990, the institution of the general ombudsman was established, based on the Swedish model, possessing broad oversight. Since 2012, with the Fundamental Law (new constitution) and a new ombudsman act entering into force, the defense of children’s rights has become one of the legal obligations of the general ombudsman. In this chapter, the author examines the historical background of this “hybrid” institution1 and the performance of the last three commissioners based on the child rights approach of the UN Convention on the Rights of the Child (UN CRC).
The UN CRC represents the “whole child” approach, a holistic view of a child which also informs the work of independent children’s rights institutions (ICRIs). Hence, the four guiding principles of the UN CRC2 (the right to non-discrimination; the best interests of the child; the right to life, survival and development; and the right to participation) can be seen as analyzable elements of an ICRI’s performance. There are also “informal” factors that can influence the performance of an ICRI – even a stand-alone – for example, social and political recognition of the institution, the societal and legal regard of children (are their rights widely recognized or not, etc.), the personal motivation and drive of the ombudsman, the ombudsman’s own interests and background, the financial constraints of the office and the overall political atmosphere and various political influences around. These factors can play a vital role, but their existence can only be assumed in cases where the institution’s more exact outputs based on the UN CRC guiding principles can be seen: the appearance of children in its work, attention to vulnerable groups and cases related to non-discrimination, the number of complaints submitted to the commissioner (including those by children) and the appearance of best interests of children in cases. The author has found differences between the last three commissioners’ performances based on the guiding principles, which are also not independent from informal factors too.
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In the former Yugoslavia and Soviet Bloc countries of Central and Eastern Europe most information technology was unavailable, unaffordable or discouraged for forty years. These…
Abstract
In the former Yugoslavia and Soviet Bloc countries of Central and Eastern Europe most information technology was unavailable, unaffordable or discouraged for forty years. These countries realise that they must improve their internal infrastructures if they are to become integral parts of the global information infrastructure. We report the results of a mail survey conducted in late 1994 and early 1995 of seventy research libraries in Croatia, Czech Republic, Hungary, Poland, Slovakia and Slovenia, building on the findings from interviews conducted with 300 persons in the region in 1993–1994. Results show that these libraries are acquiring automated processing systems, CD‐ROM databases, and connections to computer networks at a rapid rate and that automation activity has increased substantially since 1989; we report specific data on system implementation and network services by country and by type of library. ‘Access’ is their top reason to automate, which appears to mean placing the catalogue online with better search capabilities and putting items on the shelves faster — but does not necessarily mean improvements in self‐service for library users. Co‐operation and standards are highly‐ranked automation goals, yet we find anomalous results on each. Management goals focus more on speed and processing than on management information, staffing or advancing the mission of the parent organisation. Management of human resources ranks low, despite the need for wider staff involvement in the system selection process, education of technically‐trained library professionals, continuing training of staff and training of library users. We conclude with implications of these results for the region.
THERE has recently sprung up a great interest in antiques, probably due to Arthur Negus and his TV and broadcast programmes, and perhaps it is this which has made county…
Abstract
THERE has recently sprung up a great interest in antiques, probably due to Arthur Negus and his TV and broadcast programmes, and perhaps it is this which has made county librarians also, think about their past and their beginnings. Gloucestershire was the first to become aware of the fact that its library was fifty years old, and that a genuine antique, in the shape of its first librarian, still existed and could be questioned about the early days. So in December, 1967, the Gloucestershire Library Committee staged a most successful 50th birthday party, and invited me to cut the birthday cake, on which were 50 candles! And a very great occasion it was.