3,394 research outputs found
Role of Sorption Isotherms in the Analysis of Coupled Heat and Mass Fluxes in Porous Media
The aim of this work is to show the importance of the sorption isotherms
in the study of the heat and mass fluxes in unsaturated porous media. General forms of the heat and mass fluxes are presented in terms of experimentally accessible quantities. The role of the isotherm slope in the coupling of heat and mass fluxes and its influence on the effective permeability are shown. Separate relations for vapor and liquid fluxes through the porous medium are presented as functions of the temperature and the isotherm slopes. Nonstationary isothermal mass flux is also analyzed, a relaxation time for this process is identifled, and its relation to the isotherm slope is also discussed
Influences of cosmic radiation, artificial radioactivity and aerosol concentration upon the fair-weather atmospheric electric field in Lisbon (1955–1991)
The atmospheric electric field is influenced by cosmic radiation, radioactivity and aerosols. In this work we investigate the existence of: (i) correlations between relative anomalies of annual values of atmospheric electric field and cosmic radiation intensity, artificial radioactivity and aerosol concentration; (ii) seasonal correlations between relative anomalies of the atmospheric electric field and cosmic radiation intensity. We used data of the electric field strength recorded at the Portela meteorological station (Lisbon) in the period 1955–1991. We found statistically significant inverse correlations between atmospheric electric field and cosmic radiation in the period 1967–1991. We also found that the influence of cosmic radiation on the atmospheric electric field is strong in wintertime and very weak in summertime. The GCR–CN–CCN–Cloud Hypothesis and the wintertime reduced boundary layer convection are analyzed as possible explanations for this difference
The cultural models in international business research: A bibliometric study of IB journals
Culture has been a widely researched topic in the International Business (IB) literature over the last decades. To better understand what culture actually means and its implication in firms? IB operations, several cultural models and taxonomies have been put forward. In this paper we seek to scrutinize the use of three well known cultural models - Hall?s (1976), Hofstede?s (1980a) and Trompenaars & Hampden-Turner?s (1993) - in the extant research. Using bibliometric techniques of the papers published in the top ranked IB journals, we performed a citation and co-citation analysis to find out the most influential model and to examine the possible linkages between models and to the issues being researched. We conclude that Hofstede?s (1980a) taxonomy is the most cited and his taxonomy has strong linkages to several streams of research. Nonetheless, we also find that there are noticeable differences on how research in different journals make use of the cultural models, probably reflecting not surprising disciplinary emphases.Cultural models, Hofstede, Trompenaars, Hall, bibliometric study
Culture in international business research: a bibliometric study in four top IB journals
Purpose – The purpose of this paper is to conduct a study on the articles published in the four top
international business (IB) journals to examine how four cultural models and concepts – Hofstede’s
(1980), Hall’s (1976), Trompenaars’s (1993) and Project GLOBE’s (House et al., 2004) – have been used in
the extant published IB research. National cultures and cultural differences provide a crucial component
of the context of IB research.
Design/methodology – This is a bibliometric study on the articles published in four IB journals over
the period from 1976 to 2010, examining a sample of 517 articles using citations and co-citation matrices.
Findings – Examining this sample revealed interesting patterns of the connections across the studies.
Hofstede’s (1980) and House et al.’s (2004) research on the cultural dimensions are the most cited and
hold ties to a large variety of IB research. These findings point to a number of research avenues to
deepen the understanding on how firms may handle different national cultures in the geographies they
operate.
Research limitations – Two main limitations are faced, one associated to the bibliometric method,
citations and co-citations analyses and other to the delimitation of our sample to only four IB journals,
albeit top-ranked.
Originality/value – The paper focuses on the main cultural models used in IB research permitting to
better understand how culture has been used in IB research, over an extended period.info:eu-repo/semantics/publishedVersio
On the adaptation of the firm to the International Business Environment
This paper advances on the importance of the adaptation of the firm to the International Business Environment (IBE). The IBE is a distinguishing factor in international business studies and the firm?s adaptation to the environment has been presented as a basic survival strategy. We argue that adaptation is indeed a dynamic and largely internally driven process that leads the firm to co-evolve with the external environment. The ability to adapt to different international business environments is developed over time through the firm?s experiences and built into its routines. Adaptation is both suggested to incorporate the elements of a planned strategy and of random variation in search for local peaks given bounded rationality, imperfect information and the current pool of resources and capabilities. The ability to adapt to the environment may be conceptualized as a knowledge-based capability and a potential source of competitive advantage for the multinational corporation.Adaptation, International Business Environment, MNC, capabilities, evolution, environmental stability
Ethnic and racial discrimination against Chinese people in Portugal before and during the emergence of COVID- 19
This dissertation focuses on the discrimination and racism experienced by Chinese
migrants of different sociodemographic categories (first-generation immigrants,
international students, and Chinese descendants) before and during the COVID-19
pandemic. It analyses this group’s increasing awareness of and resistance to racial
discrimination in Portuguese society using qualitative research methods (semi-structured
interviews) to examine parallels between Chinese people’s experiences living in Portugal
in these two periods. Due to the significant role that the news media and activists have
played in the social construction of the anti-Asian hate movement, important qualitative
data from these sources are also analyzed. This study demonstrates how the COVID-19
pandemic has revealed the different ways discrimination and racism are experienced by
people of Chinese origin. The pandemic has brought new attention to cases of
discrimination against this community and has inspired Chinese immigrants (especially
descendants) to resist and identify racism as well as take a more active role in fighting it.Esta dissertação centra-se na discriminação e racismo vivenciados por migrantes chineses
de diferentes categorias sociodemográficas (imigrantes de primeira geração, estudantes
internacionais, e descendentes de chineses) antes e durante a pandemia de COVID-19. É
analisada a crescente consciencialização e resistência deste grupo à discriminação racial
na sociedade portuguesa, utilizando métodos de investigação qualitativa (entrevistas
semi-estruturadas) para examinar paralelos entre as experiências dos chineses que
viveram em Portugal nestes dois períodos. Devido ao papel significativo que os meios de
comunicação e os ativistas têm desempenhado na construção social do movimento anti-
Asian hate, também são analisados dados qualitativos importantes dessas fontes. Este
estudo demonstra como a pandemia do COVID-19 revelou as diferentes formas como a
discriminação e o racismo são vivenciados por pessoas de origem chinesa. A pandemia
trouxe uma nova atenção aos casos de discriminação contra essa comunidade e inspirou
os imigrantes chineses (especialmente os descendentes) a resistir e identificar o racismo,
bem como a assumir um papel mais ativo no combate ao mesmo
International Business Research: Understanding Past Paths to Design Future Research Directions
In this paper we examine the extant research in IB by conducting a bibliometric study of the articles published in three leading international business journals – International Business Review, Journal of International Business Studies and Management International Review, over their entire track record of publication available in the ISI – Institute for Scientific Information. In longitudinal analyses of citation data we ascertain the most relevant works to the international business field. We also identify intellectual interconnectedness in co-citation networks of the research published in each journal. A second-tier analysis delves into publication patterns of those articles that are not at the top citation listings. Our results permit us better understand and depict the extant international business research and, to some extent, its evolution thus far.info:eu-repo/semantics/publishedVersio
Influence of seismic activity on the atmospheric electric field in Lisbon (Portugal) from 1955 to 1991
In the present study, we considered the influence of seismic activity on the atmospheric electric field recorded at Portela meteorological station (Lisbon, Portugal) for the period from 1955 to 1991. To this end, an exploratory method was developed, which involved the selection of events for which the distance from the atmospheric electrical field sensor to the earthquake epicenter is smaller than the preparation radius of the event. This enabled the correlation of the atmospheric electric field variations with a quantity S, defined basically as the ratio of the earthquake preparation radius to the distance between the sensor and the event epicenter. The first results
show promising perspectives, but clearly a more profound study is required, in which a careful analysis of the weather conditions and other variables, like atmospheric radon levels, must be considered
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