Flow and deformation of fresh concrete

The results of studies made from the standpoint of rheology on methods of predicting flows and deformations of fresh concrete and mortar as basic research for rationalization of concrete construction are described. This paper contains as follows:

1. method of measuring viscosity of fresh concrete and mortar;
2. method of estimating deformation of fresh concrete due to its own weight;
3. proposal of the “Inclined Pipe Test Method” as a new method of testing consistency of grout mortar.

     

Some questions on the corrosion of steel in concrete—Part I: when,how and how much steel corrodes

It is widely accepted that concrete-embedded steel is in a passive state. However, there are some exceptional circumstances that induce corosion in an active state within concrete structures, thereby severely reducing their durability. This two-part paper analyses some major questions which, however elementary they may be, are still controversial in scientific, technical and economic terms. The first part provides answers to the following questions on the steel/concrete/environment system:

1. How does steel in concrete normally behave?
2. What are the initiating factors for depassivation?
3. What are the effects of corrosion?
4. What is the morphology of corrosion in the active state? and
5. What is the corrosion rate threshold above which the durability of reinforced concrete structures is impaired? The answers to these questions are provided in light of experimental results, most of which were obtained by the authors themselves.

     

The suitability of new sample preparations for the determination of the cement content of cement stabilised tropical soils

Three new sample preparation methods other than the method suggested in B.S. 1924: 1967 are utilised for the determination of the cement content of cement-stabilised tropical soils with a view to

1. reducing the quantity of acid digested,
2. making unnecessary the use of ball mill crushers, and
3. reducing the preparation time.

Statistical analyses of the results obtained indicate that the above advantages can indeed be realised and recommendations are made accordingly.     

The Quality of Domestic Legal Institutions and Export Performance

• Does the quality of domestic legal institutions matter for export performance? How does differential access to protections and privileges offered by informal institutions moderate the relationship between the quality of formal legal institutions and export performance? To answer these questions, we develop a theoretical framework drawing on insights from trade theory and institutional theory.
• We propose that higher-quality legal systems in an exporter’s location are associated with higher export performance, particularly when trade partners face higher levels of external and internal uncertainty. We further propose that firms that have less access to local informal institutions to reduce transaction costs and opportunism benefit more from better-developed legal institutions.
• Using information for more than 198,000 firms and legal quality information for 120 cities in China, we find strong support for our predictions. We discuss our contributions to the literature on institutions and export.

     

The Social Influence of Executive Hubris

• Executive hubris—an important psychological bias—affects the strategic decisions of a firm as well as their implementation. Yet executive hubris brought about by social influence in different cultural environments is not well understood.
• Anchored in the upper echelons theory and the cross-cultural management literature, this study investigated the social influence of executive hubris among peer executives in two different cultural contexts: China and the US.
• Using a large set of survey data on Chinese firms and a large archive of US firm data, we found that the social influence of executive hubris is stronger in the Chinese context than in the US. The social influence among Chinese executives tends to be moderated by their similarity in categorical factors indigenous to the Chinese context: executives who are managing state-owned firms or were politically appointed are more strongly influenced by each other than by those managing non-state-owned firms or were not politically appointed.
• We illustrate that cultural contexts give rise to differences in the social influence of executive hubris.

     

Japanese national project on intermetallics and composites

Since 1989 a group of national laboratories, universities and member companies have been challenging a series of tough research areas concerning advanced materials used by, for example, space planes, and hypersonic aircraft to withstand the severest of environments. As an eight-year national project, intermetallic compounds, Ti?Al and Nb?Al, petroleum pitch-based and coal tar pitch-based carbon/carbon composites, and fiber-reinforced intermetallic compound composites have been taken up. Extensive research activities have been covered as follows:

• fundamental characteristics,
• design of the material,
• casting, rolling, powdering, forming and near net shaping,
• surface treatment for oxidation resistance.

The authors briefly review major R&D activities and achievements obtained so far, focusing on these intermetallics, carbon/carbon composites, and fiber-reinforced intermetallic compounds.     

The Impact of Psychic Distance on Chinese Outward Foreign Direct Investments

• The aim of this paper is to investigate the value of the well-known construct of psychic distance, developed to explain the internationalization path of firms from developed countries, for the internationalization of Chinese firms.
• Our research question is: Does psychic distance and its individual stimuli (differences in language, religion, culture, economic development, political systems, education, and geographic distance) explain Chinese investments abroad?
• We test hypotheses on the relation between psychic distance and its stimuli and Chinese outward direct investments with OLS regression analyses.
• We find that Chinese OFDI indeed is influenced by an aggregate construct of psychic distance and by certain psychic distance stimuli, but not by all; in particular, similarities or differences with regard to language and culture, the level of industrialization and the level of democracy relate to Chinese firms’ internationalization.
• Our findings suggest that psychic distance and its stimuli cannot be ignored as explanatory factors for Chinese outward FDI but that the explanatory value of these constructs depends on the context of the phenomenon under study.
• We conclude that it is important to understand how the home country context influences managerial perceptions and thereby patterns of international expansion from different regions.

     

Market Orientation, Embeddedness and the Autonomy and Performance of Multinational Subsidiaries in an Emerging Economy

• This paper develops a conceptual framework for market orientation, embeddedness, autonomy and performance of multinational subsidiaries in an emerging economy.
• We argue that internal and external embeddedness has different performance implications for export- and local market-oriented multinational subsidiaries.
• Our results, based on a sample of 233 multinational subsidiaries from China, indicate that while external embeddedness has a positive impact on specialized resources of both types of subsidiary, such resources only positively affect the performance of local market-oriented subsidiaries. By contrast, internal embeddedness has a negative impact on specialized resources of both types of subsidiary.
• Managerial and policy implications are discussed.

     

Mao Meets the Market

• This study sought to examine the relative impact of several competing sources of values and ideologies—Chinese Traditional Values, Capitalist Values, Socialist Ideology and Deng Xiaoping’s Philosophy—on Chinese businesspersons. In contrast to previous research that has focused almost exclusively on cultural influences, this research was aimed at also understanding political influences.
• Questionnaire data from 487 respondents drawn from two cities and three industrial sectors was analyzed by means of structural equation modeling.
• Positive and significant relationships were revealed between Socialist Ideology and both Chinese Traditional Values and Deng’s Philosophy. While a negative and significant relationship was shown between Socialist Ideology and Capitalist Values, Capitalist Values were positively and significantly related to Deng’s Philosophy.
• Chinese businesspersons live with some apparent contradictions between espoused values and the realities of economic life. The paper explores how they are reconciled and examines their implications for various stakeholders.

     

Structure and mechanical properties of internally hydrided Mg-IIIa transition metal alloys

Magnesium alloys containing III_a transition metals, such as Sc, Y and Ho, respectively, were hydrogenated at 773 K and examined for microstructure, X-ray diffraction pattern, micro-Vickers hardness, and tensile properties at room and high temperatures. Results obtained are as follows:

1. The alloys, respectively, have been internally hydrided and have precipitated hydrides of the III_a transition metals as small flake-like particles in the matrix and at grain boundaries, as well as twin boundaries.
2. The dispersed hydride particles do not necessarily contribute to further hardening of the alloys at room temperature and up to near 673 K.
3. However, the dispersed particles are very stable and seem to improve mechanical properties of the alloys above 673 K.
4. Presumed relationships of crystallographic coincidence between the matrix and hydrides have been obtained.

     

Technological Knowledge Intensity and Entry Mode Diversity

• This paper expands the entry mode literature by referring to multiple modes exerted simultaneously in different value chain activities within and across host markets, rather than to a single entry mode at the host market level. We apply competing theoretical perspectives—internalization theory and knowledge transfer efficiency considerations on the one hand, and organizational learning theory on the other—to argue that firms’ technological knowledge intensity affect their entry mode diversity across value chain activities, across host markets, and at the overall corporate level.
• Analyzing a unique dataset we show that high technological knowledge intensity is strongly associated with high entry mode diversity across value chain activities and at the corporate level, but only weakly associated with greater entry mode diversity across geographic host markets.

     

What Do HR Managers Really Do?

• The contribution of the HR function in supporting international business operations has received limited attention to date, with even less attention paid to HR roles.
• This article seeks to address this by studying the role of HR managers on international projects.
• We identify five IHR roles: service provider, policy police, strategic partner, change agent; and welfare officer.
• We also identifyhow these roles are enacted, questioning the prevailing divide between strategic and operational roles; and adding another dimension??emotional.
• We also argue that role enactment is context-specific; and show how context constrains as well as enables IHR role enactment.

     

The optimization test environment

The Optimization Test Environment is an interface to efficiently test different optimization solvers. It is designed as a tool for both developers of solver software and practitioners who just look for the best solver for their specific problem class. It enables users to:

Choose and compare diverse solver routines;

Organize and solve large test problem sets;

Select interactively subsets of test problem sets;

Perform a statistical analysis of the results, automatically produced as , PDF, and JPG output.

The Optimization Test Environment is free to use for research purposes.     

Dual-Option Subsidiaries and Exit Decisions During Times of Economic Crisis

• This study examines the dual implications of dual-option subsidiaries on exit decisions during times of economic crisis. Retaining dual-option subsidiaries in crisis-stricken countries means leaving a shadow option open for future growth once a crisis ends. However, MNCs may encounter problems pursuing either option due to challenges in managing dual-option subsidiaries with clashing strategic mandates.
• The equivocal nature of dual-option subsidiaries points to the possibility of another factor playing an important moderating role in exit decisions—subsidiary performance—which has been rarely considered in the MNC real options literature. Our primary argument is that lower subsidiary performance increases the influence of shadow option value embedded in dual-option subsidiaries.
• Analyzing a sample of 703 Korean overseas manufacturing subsidiaries in Asian countries, we find that when profitability falls, subsidiaries with dual options are less likely to be exited than those with single options.

     

Counting,types and symbols of crystallographic Point Symmetry Operations of space E n

This paper describes three methods to calculate the number of types of crystallographic Point Symmetry Operations (crPSOs for short) in a space of any finite dimension. We begin our presentation by recalling some properties of Point Operations:

?crystallographic restrictions,

?relation between the number of types of positive (crPSO⁺) and negative (crPSO^?) crystallographic Point Symmetry Operations in spaces of odd dimension,

?definition of transitive and non-transitive Point Operations.

In Part One, we summarize the Hermann method whereupon this technique is used to calculate the number of types of crPSOs for ann-dimensional space up ton=16. Then, in Part Two, we develop a new method using the Euler indicatrix and the pseudo-Cartesian product of several sets. This method furnishes a formula for determining the number of crPSOs in spaces of arbitrary finite dimension; this number was calculated by computer for spaces having up to 70 dimensions. Finally, in Part Three, we elaborate another novel method based on the following properties of the characteristic equation of a crPSO: its entries are integers and its determinant is +1 (for a crPSO⁺). Such a method provides the solution for any characteristic equation. The main concepts from crystallography which we employ in our study are explained in the Appendix.     

Foreign Direct Investment vs. Foreign Portfolio Investment

• We examine the effect of a country??s governance environment on the foreign investment it attracts. We classify countries based on the dominant mode of governance into three types: (1) rule-based (strong public rule of law), (2) relation-based (weak rule of law and strong informal networks), and (3) family-based (absence of both public rules and informal networks).
• We then examine how different governance types affect foreign investment patterns among 45 countries. Our main argument is that the choice of investment??direct or portfolio??is influenced by the type of property protection associated with different governance modes.
• We find that rule-based countries attract the lowest amount of FDI relative to the total amount of foreign investment, and they have the largest stock market size relative to their economies.
• Our study contributes to the foreign investment literature by bringing the governance environment into the equation and more successfully explaining why some countries have relatively large foreign direct investment ratios and relatively small foreign portfolio investment ratios.

     

International Activities of Emerging Market Firms

• During the last decade emerging market firms (EMFs) have increasingly attracted scholarly attention. Yet, the conclusions concerning the nature and the theoretical foundations of EMFs?? international expansion vary greatly thus calling for a critical assessment of the existing theorizing in this field.
• We examine publications on the internationalization of EMFs in fourteen top international management (IM) journals in the period of 2000?C2010 and use the inductive approach and the qualitative content analysis methodology.
• Our analysis shows that the published research can be classified into two groups: macro- and micro-level studies. The former predominantly employ macro-level institutional factors to examine the overall patterns of EMFs?? international expansion, while the latter build on a wider range of approaches, including the resource-based view, network and strategy perspectives to investigate various aspects of EMFs?? internationalization.
• The paper identifies a number of theoretical inconsistencies in the existing research that arguably cause ambiguity in findings and suggests future research directions to address these inconsistencies. By doing so the analysis contributes to the central debate in literature concerning whether conventional theories suffice to explain the EMFs?? internationalization or new theoretical approaches are needed.
• The analysis illustrates that the research on EMFs?? internationalization can be improved through refined application of a broader range of methodologies such as longitudinal and mixed-method studies. The geographic focus of studies needs to be widened as well. Currently it is clearly biased towards China, while other emerging markets remain under-researched.

     

Does National Context Affect Target Firm Employees’ Trust in Acquisitions?

• In this study, we test the assumption that the way target firm employees respond to a takeover is contingent on their national origin.
• The antecedents of target firm member trust in the acquiring firm management were examined in a cross-national sample of German and Singaporean employees using a policy-capturing design.
• Five factors hypothesized to affect target firm member trust after a takeover were found to be significant influences on employees?? trust judgments in a decision-making simulation: (i) combining firms?? collaboration history, (ii) mode of takeover, (iii) whether it was a domestic or cross-border acquisition, (iv) degree of autonomy removal, and (v) attractiveness of the acquiring firm??s human resource policies and reward system. Further analyses suggest that the relative importance of these factors in predicting target firm employees?? reactions to a takeover varies depending on their national origin.
• We conclude that companies engaged in cross-border acquisitions need to consider contingencies in the cultural and institutional contexts in which the acquired firms are embedded and adapt their approaches for integrating them accordingly.

     

In at the Deep End of Firm Internationalization

• The purpose of this research is to examine the consequences of top management team (TMT) internationalization: why and under what conditions can TMT nationality diversity be beneficial?
• On the basis of the upper echelons theory from the strategic leadership literature, the relationship between the TMT nationality diversity and firm performance in the strategic context of firm internationalization is investigated in moderated multiple regressions models (MMR) for a sample of Dutch, Swiss, and UK companies.
• The study findings suggest that the TMT nationality diversity becomes advantageous only in firms with high degree of internationalization. Companies have to be strongly committed to foreign markets so that the benefits of the TMT nationality diversity can materialize.
• The arising managerial implication is that the TMT nationality diversity can be a powerful tool in building a firm’s competitive advantage, provided that companies are strongly exposed to the international environment. The study also provides corroborative evidence that the search for moderating and mediating variables in the TMT demography research represents a step in the right direction.

     

Stopford and Wells were Right! MNC Matrix Structuresdo fit a “High-High” Strategy

• This paper seeks to address a primary question about matrix structures: under which strategic condition should multinational companies (MNCs) use matrix structures instead of other structures? To answer this question, the seminal Stopford and Wells Model (1972) is re-examined.
• Stopford and Wells (1972) predicted in their model that MNCs tend to use matrix structure to implement high levels of dual strategies??foreign product diversification and area diversification. Their prediction, however, has remained theoretically unclear and empirically unproven.
• To address this gap in the strategy-structure literature, we re-examine and revise the Stopford and Wells Model to explain the strategic condition in which MNCs tend to use matrix. The key of the revision is to use ??corporate integration?? instead of ??foreign product diversification??.
• The revised model is preliminarily supported by the data from a study of German MNCs. This suggests that corporate integration, together with area diversification, are the two over-riding strategies that lead to MNCs?? use of matrix.