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1 – 10 of 450Bodo Müller, Martin Schubert and Gudrun Kinet
A lamellar zinc pigment reacts in aqueous alkaline media (e.g. water‐borne paints) with the evolution of hydrogen. This corrosion reaction can be inhibited by certain surfactants…
Abstract
A lamellar zinc pigment reacts in aqueous alkaline media (e.g. water‐borne paints) with the evolution of hydrogen. This corrosion reaction can be inhibited by certain surfactants. The most important structural part of the examined surfactants is the hydrophilic group; only anionic phosphate or phosphonate hydrophilic groups are effective corrosion inhibitors. Surfactants with carboxylate, sulfonate, amphoteric, cationic and non‐ionic hydrophilic groups are ineffective. There seems to be also an influence of the hydrophobic group of the surfactants because a partial ester of phosphoric acid with a fluorinated hydrophobic group was the most effective corrosion inhibitor in this study.
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Entrepreneurship, Money, and Coordination begins with a single page introduction by the editor, Jurgen Backhaus, a well known economist now at the University of Erfurt, in which…
Abstract
Entrepreneurship, Money, and Coordination begins with a single page introduction by the editor, Jurgen Backhaus, a well known economist now at the University of Erfurt, in which we learn that the contribution by Horst Feldmann (Hayek's theory of cultural evolution: A critique of the critiques) provided the impetus for the book's remaining six chapters, a mélange of papers by Brian J. Loasby,1 Jurgen G. Backhaus, Christian Schubert, Alexander Ebner, Martin T. Bohl and Jens Holscher, and Walter W. Heering. Unfortunately, the papers assembled here do not cohere well and in some instances are not altogether “reader-friendly.” The papers by Bohl and Holscher (a six-page overview and econometric analysis of Hayek's theory of competing currencies) and Heering (on monetary theory) seem rather disconnected from the main theme of the book. Surprisingly, Backhaus’ “Introduction” does not provide a useful integrating overview of the book's subject matter and papers, something readers surely would have appreciated from so eminent a scholar.
Ali Akbar Khasseh, Faramarz Soheili and Afshin Mousavi Chelak
This research aims to examine the intellectual structure of iMetrics through author co-citation analysis.
Abstract
Purpose
This research aims to examine the intellectual structure of iMetrics through author co-citation analysis.
Design/methodology/approach
This research uses common techniques in bibliometrics and social network analysis. It analyses 5,944 records from the Web of Science in the field of iMetrics that are published between 1978 and 2014.
Findings
Findings indicated that researchers including “Garfield”, “Egghe”, “Glanzel”, “Leydesdorff” and “Price” have received many co-citations. The author co-citation analysis in iMetrics resulted in eight thematic clusters, including “theoretical foundations and citation analysis”, “sociology of science”, “science mapping and visualization”, “network analysis”, “classic laws of bibliometrics”, “webometrics”, “technometrics” and “miscellaneous”. “Theoretical foundations and citation analysis” is the biggest cluster which comprises 59 authors. The results suggest the crucial role of price medallists in shaping the intellectual structure of knowledge in iMetrics.
Originality/value
Extracting the patterns embedded in the knowledge structure of iMetrics studies provides beneficial information for both researchers and policymakers. This research study is valuable that used an appropriate set of records regarding both recall and precision. Furthermore, this study helps us better understand the characteristics of iMetrics, its subject areas, and the prominent authors in those areas.
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This chapter investigates the ongoing process of academization within the field of educational therapy in Germany, particularly in the context of the introduction of university…
Abstract
This chapter investigates the ongoing process of academization within the field of educational therapy in Germany, particularly in the context of the introduction of university degrees in integrative educational therapy and the psychology of learning. The introduction of these degrees brought about transformative changes in the professional landscape. Educational therapists holding such degrees often demonstrate a more advanced understanding of their roles, which is underpinned by thorough university education and the legitimizing influence of their academic titles. Prior to the establishment of these degree programs, the field of educational therapy was notably unregulated, devoid of a protected professional title or a specific qualification. This lack of regulation resulted in a proliferation of varied providers, giving rise to what’s known as the “after-school market” phenomenon. This chapter explores the genesis and institutionalization of degree programs in educational therapy as a path toward professionalizing the field. It reveals the crucial role that professional associations along with scientific experts have played in launching these degree programs. Additionally, it discusses the impact of competition among different approaches to educational therapy within this rapidly evolving landscape.
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Bodo Müller, Martin Schubert and Claude Oughourlian
Aluminium and zinc pigments corrode in aqueous alkaline paint media with the evolution of hydrogen. Maleic acid‐styrene‐acrylic ester copolymers were synthesized by…
Abstract
Aluminium and zinc pigments corrode in aqueous alkaline paint media with the evolution of hydrogen. Maleic acid‐styrene‐acrylic ester copolymers were synthesized by copolymerisation of maleic acid anhydride, styrene and different (meth)acrylic esters. Three acrylic esters (ethyl, n‐butyl, n‐hexyl) and two methacrylic esters (n‐dodecyl, n‐octadecyl) were used; the copolymers with long‐chain acrylic esters are amphiphilic. Additionally, a commercial (non‐amphiphilic) styrene‐maleic acid copolymer (SMA) with similar molecular mass and acid number was tested. The corrosion reaction of aluminium and zinc pigments in aqueous alkaline media can be inhibited by addition of these copolymers. But aluminium and zinc pigments react completely differently with the examined copolymers. With addition of the amphiphilic maleic acid‐styrene‐acrylic ester copolymers to aluminium pigment dispersions the evolved hydrogen volumes decrease with increasing chain‐length of the acrylate monomer in the copolymers, whilst with zinc pigment the hydrogen volumes increase, which is just the opposite compared with aluminium. Furthermore, there exist mathematical correlations between the number of carbon atoms of the ester alcohol of the acrylate monomer in the copolymers and the hydrogen volumes evolved.
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António Miguel Martins and Cesaltina Pires
This paper aims to highlight the role of the CEO’s background in the stock market reaction to a product recall. Based on the upper echelons theory and the crisis management…
Abstract
Purpose
This paper aims to highlight the role of the CEO’s background in the stock market reaction to a product recall. Based on the upper echelons theory and the crisis management literature, we argue that the CEO’s background influences the expected response in a product harm crisis and the updating of investors’ expectations following a product recall announcement. We test if the CEO’s background influences the abnormal stock market returns around product recalls and how it affects the way investors interpret the recall strategy and severity.
Design/methodology/approach
We use an event study, for a sample of 2,576 product recalls in the US automobile industry, between January 2010 and June 2021.
Findings
We observe that the stock market’s reaction is less negative if the firm’s CEO presents a core specialist background and for firms led by insider CEOs. This result is in line with our argument that in the presence of a crisis that requires operational and firm-specific knowledge, such as product recalls, the best alignment in terms of the CEO’s background occurs when the CEO was recruited inside and is a core specialist. Finally, we also find that the CEO’s background has a moderating effect on the impact of the recall strategy and severity on the stock market reaction to a recall announcement. In particular, a recall with high severity has a more negative stock market reaction when the CEO is a core specialist as such an event is not expected by the market.
Practical implications
These results have important implications for practitioners and scholars working in the areas of product quality and corporate governance. Given the high frequency and high costs for firms to carry out these operations in the automobile industry, we recommend a careful analysis of the CEO’s background before their appointment as well as careful planning to prevent and to adequately react appropriately to product quality problems. While there is a common tendency among executives to cut discretionary expenditures such as spending on product safety, our results regarding the stock market reaction to product recall announcements suggest that investors expect firms led by insider and core specialist CEOs to be more likely to ensure product quality and to respond to product quality crisis.
Originality/value
We extend knowledge of product recalls by studying the role of the CEO’s background on the stock market reaction to product recall announcements.
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Neeraj Gupta and Jitendra Mahakud
The purpose of this study is to examine the impact of chief executive officer (CEO) personal characteristics on the performance of Indian commercial banks. Additionally, it also…
Abstract
Purpose
The purpose of this study is to examine the impact of chief executive officer (CEO) personal characteristics on the performance of Indian commercial banks. Additionally, it also analyses the nonlinear relationship of CEO age and CEO tenure on the bank performance.
Design/methodology/approach
A balanced panel data approach has been used in this study. Particularly, the fixed effect estimation technique is used to examine the relationship between CEO characteristics and bank performance during the period 2009–2010 to 2016–2017.
Findings
The authors find that professional qualification of CEOs in finance stream enhances performance. Additionally, the impact of CEO duality is found to be positive and significant on performance. Male CEOs are beneficial for bank performance. Well experienced CEOs contribute to higher performance. The results are robust across the various proxies of bank performance, and sub-samples based on ownership, size of the bank and board size.
Practical implications
This study provides insights to policy regulators and policymakers who are entrusted with the appointment of the CEOs in the banks in the light of the ongoing regulatory reforms.
Originality/value
This study can be considered as one of the early studies, which examines the association between CEO characteristics and bank performance from an emerging economy perspective. It also extends the existing study by considering both public and private banks operating in India.
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Maria Lykova, Iuliana Panchenko, Ulrich Künzelmann, Johanna Reif, Marion Geidel, M. Jürgen Wolf and Klaus-Dieter Lang
Cu/Cu diffusion bonding is characterised by high electrical and thermal conductivity, as well as the mechanical strength of the interconnects. But despite a number of advantages…
Abstract
Purpose
Cu/Cu diffusion bonding is characterised by high electrical and thermal conductivity, as well as the mechanical strength of the interconnects. But despite a number of advantages, Cu oxidises readily upon exposure to air. To break through the adsorbed oxide-layer high temperature and pressure, long bonding time and inert gas atmosphere are required during the bonding process. This paper aims to present the implementation of an organic self-assembled monolayer (SAM) as a temporary protective coating that inhibits Cu oxidation.
Design/methodology/approach
Information concerning elemental composition of the Cu surface has been yielded by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FTIR) spectroscopy. Two types of substrates (electroplated and sputtered Cu) are prepared for thermocompression bonding in two different ways. In the first case, Cu is cleaned with dilute sulphuric acid to remove native copper oxide. In the second case, passivation with SAM followed the cleaning step with dilute sulphuric acid. Shear strength, fracture surface, microstructure of the received Cu/Cu interconnects are investigated after the bonding procedure.
Findings
The XPS method revealed that SAM can retard Cu from oxidation on air for at least 12 h. SAM passivation on the substrates with sputtered Cu appears to have better quality than on the electroplated ones. This derives from the results of the shear strength tests and scanning electron microscopy (SEM) imaging of Cu/Cu interconnects cross sections. SAM passivation improved the bonding quality of the interconnects with sputtered Cu in comparison to the cleaned samples without passivation.
Originality/value
The Cu/Cu bonding procedure was optimised by a novel preparation method using SAMs which enables storage and bonding of Si-dies with Cu microbumps at air conditions while remaining a good-quality interconnect. The passivation revealed to be advantageous for the smooth surfaces. SEM and shear strength tests showed improved bonding quality for the passivated bottom dies with sputtered Cu in comparison to the samples without SAM.
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