Women's small share of professional and managerial occupations compared with their share of the total labor force is examined for the 11 largest racial and ethnic minorities in the United States. Gender-related characteristics—women's labor force participation rates, marital status, and the sex ratio—influence women's share of the top jobs, as do class and ethnic variables such as place of birth, population size, and class of worker. Labor market gender inequality is greatest among the smaller, more affluent minorities, many of whom (...) are recent immigrants to this country. The larger, frequently indigenous, minority groups exhibit less of this kind of inequality. Minority and gender status intersect, so that men monopolize surplus resources among the more affluent minority groups and use these resources to secure a more advantaged labor market position. (shrink)

Telegraphy, the distant ancestor of Internet and GSM (Global System for Mobile Communications), was invented by Samuel Morse in 1838. One year later, William Grove invented the fuel cell. Although numerous highly successful innovations stemming from telegraphy may be observed, the development of fuel cells has been insignificant, slow, and erratic and has not yet resulted in notable positive socioeconomic effects. By comparing the modern development of fuel cells and hydrogen technology, that is, a potential radical innovation in energy generation, (...) with some aspects related to the evolution of two highly successful radical innovations, Internet and GSM, the author focuses on the role of innovation regimes and policy in a sectorial system of innovations perspective. In the slow pace in fuel cells and hydrogen technology development, two factors seem to interact negatively: weak and fragmented innovation regimes in the energy sector and the current hegemony of market-oriented R&D policies. (shrink)

According to modern physics and cosmology, the universe expands at an increasing rate as the result of a “dark energy” that characterizes empty space. Although dark energy is a modern concept, some elements in it can be traced back to the early part of the twentieth century. I examine the origin of the idea of zero-point energy, and in particular how it appeared in a cosmological context in a hypothesis proposed by Walther Nernst in 1916. The hypothesis of a zero-point (...) vacuum energy attracted some attention in the 1920s, but without attempts to relate it to the cosmological constant that was discussed by Georges Lemaître in particular. Only in the late 1960s, was it recognized that there is a connection between the cosmological constant and the quantum vacuum. As seen in retrospect, many of the steps that eventually led to the insight of a kind of dark energy occurred isolated and uncoordinated. (shrink)

This commentary reviews the basic physical principles underlying human single- and multi-joint arm movements. The potential role of the cerebellum in dealing with the physics of movement is discussed in the light of recent physiological findings and the theoretical model of cerebellar detection and generation of input and output sequences put forward by Braitenberg and colleagues.

Keine ausführliche Beschreibung für "Natur und Technik – Theorie und Strategie" verfügbar.

Dialogical logic is a game-theoretical approach to logic. Logic is studied with the help of certain games, which can be thought of as idealized argumentations. Two players, the Proponent, who puts forward the initial thesis and tries to defend it, and the Opponent, who tries to attack the Proponent’s thesis, alternately utter argumentative moves according to certain rules. For a long time the dialogical approach had been worked out only for classical and intuitionistic logic. The seven papers of this dissertation (...) show that this narrowness was uncalled for. The initial paper presents an overview and serves as an introduction to the other papers. Those papers are related by one central theme. As each of them presents dialogical formulations of a different non-classical logic, they show that dialogical logic constitutes a powerful and flexible general framework for the development and study of various logical formalisms and combinations thereof. As such it is especially attractive to logical pluralists that reject the idea of “the single correct logic”. The collection contains treatments of free logic, modal logic, relevance logic, connexive logic, linear logic, and multi-valued logic. (shrink)

There is an argument (first presented by Fitch), which tries to show by formal means that the anti-realistic thesis that every truth might possibly be known, is equivalent to the unacceptable thesis that every truth is actually known (at some time in the past, present or future). First, the argument is presented and some proposals for the solution of Fitch's Paradox are briefly discussed. Then, by using Wehmeier's modal logic with subjunctive marks (S5*), it is shown how the derivation can (...) be blocked if one respects adequately the distinction between the indicative and the subjunctive mood. Essentially, this proposal amounts to the one by Edgington which was formulated with the help of the actuality-operator. Finally it is shown how the criticisms by Williamson against Edgington can be answered by the formulation of a new conception of possible knowledge that \alpha (thereby \alpha being in the indicative mood and thus referring to the actual world). This conception is based on the concept of same de re knowledge in different possible worlds. (shrink)

Attempts to explain the periodic system as a manifestation of regularities in the structure of the atoms of the elements are as old as the system itself. The paper analyses some of the most important of these attempts, in particular such works that are historically connected with the recognition of the electron as a fundamental building block of all matter. The history of the periodic system, the discovery of the electron, and ideas of early atomic structure are closely interwoven and (...) transcend the physics–chemistry boundary. It is pointed out that J. J. Thomson's discovery of the electron in 1897 included a first version of his electron atomic model and that it was used to suggest how the periodic system could be understood microphysically. Thomson's theory did not hold what it promised, but elements of it were included in Niels Bohr's first atomic model. In both cases, Thomson's and Bohr's, the periodic system played an important role, heuristically as well as justificatory. (shrink)

In his Doctrine of Right, Immanuel Kant calls Moses Mendelssohn, the towering figure of the German and the Jewish Enlightenment, a ‘Rechtsforscher’—a legal scholar. Yet not only Kant, but numerous scholars of Natural law in the 18th and 19th centuries refer to and reflect on the juridical aspects of Mendelssohn’s work, in particular his thoughts on the law of contract. In this article, I hope to shed some light on this hitherto rather unexplored facet of Mendelssohn’s oeuvre. Mendelssohn develops his (...) theory of contract from the starting point of the officium amoris: the unenforceable ‘duty of love’ to exercise beneficence. Mendelssohn’s theory knows nothing yet of the modern contrast between altruism, distributive justice and ‘freedom of contract’. By exploring Mendelssohn’s theory, we will thus be able to catch a glimpse of the birth pangs of the modern Western discourse on the ‘freedom of contract’, which formed the backdrop as well as the jumping-off point of the development of a ‘liberal’ will theory of contract. Since this ‘liberal’ model is still the paradigm of how contract is mostly perceived today, Mendelssohn’s theory also exemplifies the possibility of an alternative to our own conceptualizations of contract that inescapably shape the way we think. (shrink)

Special purpose service robots have already entered the market and their users’ homes. Also the idea of the general purpose service robot or personal robot companion is increasingly discussed and investigated. To probe human–robot interaction with a mobile robot in arbitrary domestic settings, we conducted a study in eight different homes. Based on previous results from laboratory studies we identified particular interaction situations which should be studied thoroughly in real home settings. Based upon the collected sensory data from the robot (...) we found that the different environments influenced the spatial management observable during our subjects’ interaction with the robot. We also validated empirically that the concept of spatial prompting can aid spatial management and communication, and assume this concept to be helpful for Human–Robot Interaction design. In this article we report on our exploratory field study and our findings regarding, in particular, the spatial management observed during show episodes and movement through narrow passages. Keywords: COGNIRON, Domestic Service Robotics, Robot Field Trial, Human Augmented Mapping, Human–Robot Interaction, Spatial Management, Spatial Prompting. (shrink)

Artificial neural networks (ANNs) are new mathematical techniques which can be used for modelling real neural networks, but also for data categorisation and inference tasks in any empirical science. This means that they have a twofold interest for the philosopher. First, ANN theory could help us to understand the nature of mental phenomena such as perceiving, thinking, remembering, inferring, knowing, wanting and acting. Second, because ANNs are such powerful instruments for data classification and inference, their use also leads us into (...) the problems of induction and probability. Ever since David Hume expressed his famous doubts about induction, the principles of scientific inference have been a central concern for philosophers. (shrink)

Presentation at "Filosofidagarna 2001", Stockholm, Sweden.

We have studied ethical considerations of care among health professionals when treating and setting priorities for elderly patients in Norway. The views of medical doctors and nurses were analysed using qualitative methods. We conducted 21 in depth interviews and 3 focus group interviews in hospitals and general practices. Both doctors and nurses said they treated elderly patients different from younger patients, and often they were given lower priorities. Too little or too much treatment, in the sense of too many interventions (...) and too much drugs, combined with too little care and comfort, was admitted as a relatively frequent yet unwanted consequence of the way clinical priorities were set for elderly patients. This was explained in terms of elderly patients not tolerating the same treatment as younger patients, and questions were raised about the quality of life of many elderly patients after treatment. These explanations were frequently referred to as medically sound decision making. Other explanations had little to do with medically sound decisions. These often included deep frustration with executive guidelines and budget constraints. (shrink)

Background: There is little research comparing clinicians’ and managers’ views on priority settings in the healthcare services. During research on two different qualitative research projects on healthcare prioritisations, we found a striking difference on how hospital executive managers and clinical healthcare professionals talked about and understood prioritisations. Aim: The purpose of this study is to explore how healthcare professionals in mental healthcare and somatic medicine prioritise their care, to compare different ways of setting priorities among managers and clinicians and to (...) explore how moral dilemmas are balanced and reconciled. Research design and participants: We conducted qualitative observations, interviews and focus groups with medical doctors, nurses and other clinical members of the interdisciplinary team in both somatic medical and mental health wards in hospitals in Norway. The interviews were recorded and transcribed verbatim. Ethical considerations: Basic ethical principles for research ethics were followed. The respondents signed an informed consent for participation. They were assured anonymity and confidentiality. The studies were approved by relevant ethics committees in line with the Helsinki Convention. Findings: Our findings showed a widening gap between the views of clinicians on one hand and managers on the other. Clinicians experienced a threat to their autonomy, to their professional ideals and to their desire to perform their job in a professional way. Prioritisations were a cause of constant concern and problematic decisions. Even though several managers understood and empathised with the clinicians, the ideals of patient flow and keeping budgets balanced were perceived as more important. Discussion: We discuss our findings in light of the moral challenges of patient-centred individual healthcare versus demands of distributive justice from healthcare management. Conclusion: The clinicians’ ideals of autonomy and good medical and nursing care for the individual patients were perceived as endangered. (shrink)

In dominant discourses, migrants are mostly perceived as either victims or villains but rarely as political subjects and democratic constituents. Challenging this view, the aim of the article is to rethink democracy with respect to migration struggles. I argue that movements of migration are not only consistent with democracy but also provide a decisive impetus for actualizing democratic principles in the context of debates about the crisis of representation and post-democracy. Drawing on the work of Jacques Rancière, Étienne Balibar and (...) Ernesto Laclau and Chantal Mouffe, I develop a theory of radical democracy as practice, which, starting from the proposed notion of ‘democratic difference’, goes beyond the fixation on democratic regimes and focuses on contentious practices of enacting democratic principles. I articulate these theoretical concepts by analysing how refugees in Germany have managed to break out of a marginalized position and have challenged their denial of rights through a protest march. (shrink)

Kant is generally conceived to have offered little attention to the fact that we experience the world in and through our bodies. This book argues that this standard image of the great German philosopher is radically wrong. Not only does Kant - throughout his career and in works published before and after the Critique of pure reason - reflect constantly upon the fact that human life is embodied, but the Critique of pure reason itself may be read as a critical (...) reflection aimed at exploring some significant philosophical implications of this fact. Bringing this aspect of Kant's philosophy into focus is important, not only because it sheds new light on our understanding of Kant's work, but also because it is relevant to contemporary discussions in philosophy about embodiment, learning and practice. By taking his philosophy of embodiment into account, the author makes Kant stand out as a true contemporary in new and unexpected ways. (shrink)

A mobile service robot performing a task for its user might not be able to accomplish its mission without help from other people present in the shared environment. In previous research, collaborative control has been studied as an interactive mode of operation with a robot, compensating for its limitations in autonomy. However, few studies of robots requesting assistance by detecting potential collaborators, directing its attention to them, addressing them, and finally obtaining help from them, have previously been performed in real-world (...) use contexts. This study focuses on a fetch-and-carry robot, Cero, which has been designed to operate in an office environment as an aid for motion-impaired users. During its missions, the robot sometimes needs help with loading or unloading an object. The main question for the study was: under what conditions are people willing to help when requested to do so by the robot? We were particularly interested in bystanders, i.e. people who happened to be in the environment but who did not “have any official business” with the robot. To answer these questions and to provide a better understanding of human–robot help-seeking situations, we conducted an experimental study in which subjects who had not encountered our service robot before were requested to assist it with a task. The results of the study confirm that bystanders can to some degree be expected to help in robot missions, but that their willingness to help the robot depends on the situation and state of occupation that people are in when requested to interact with and assist the robot. (shrink)

Poster presented at the conference "Toward a Science of Consciousness" , Tucson, Arizona, April 10-15, 2000.

This volume offers a critical analysis and illustration of the challenges and promises of ‘stateless’ law thought, pedagogy and approaches to governance - that is, understanding and conceptualizing law in a post-national condition. Confronting the ‘transnational challenge’ posed to the traditional theoretical and institutional structures that underlie the teaching and study of law in the university, the book brings new insight to the ongoing and crucial conversation about the future shape of legal scholarship, education and practice that is emblematic of (...) the early twenty-first century. (shrink)

The Scandinavian working-life tradition is founded on ideas and values similar to the model of conductivity. However, although the Scandinavian working-life tradition is pragmatic and consensus seeking the model of conductivity is stringent following its principles. The pragmatic approach, here represented by the Danish program of “the developmental work,” has made it difficult to follow the vision of the program (to improve working conditions and at the same time meet social and environmental needs). Instead, the program has mainly targeted organizational (...) development in established companies, accepting the existing principles of wealth creation. The model of conductivity can strength the visions behind the pragmatic approach by its conceptualization of an alternative creation of wealth related to opportunities in current working life: a creation of wealth based on skill, creativity and networking among employees across the borders of the organizations and released from the language of management. (shrink)

So-called antimatter in the form of elementary particles such as positive electrons (antielectrons alias positrons) and negative protons (antiprotons) has for long been investigated by physicists. However, atoms or molecules of this exotic kind are conspicuously absent from nature. Since antimatter is believed to be symmetric with ordinary matter, the flagrant asymmetry constitutes a problem that still worries physicists and cosmologists. As first suggested by Paul Dirac in 1933, in distant parts of the universe there might be entire stars and (...) galaxies made of antiparticles alone. Why not? This paper examines how the concepts of antiparticles and antimatter slowly migrated from particle physics to astronomy and cosmology. At around 1970 a few physicists speculated about an anti-universe separate from ours while others looked for the charge asymmetry in quantum processes in the early big-bang explosion of the universe. Others again proposed a ‘plasma cosmology’ that kept our world and the hypothetical world of antimatter apart. Soviet physicists and astronomers were no less interested in the problem than their colleagues in the West. The paper details the development up to the late 1970s, paying attention not only to mainstream scientific works but also to more speculative ideas, some of them very speculative. By that time the antimatter mystery remained mysterious – which is still the situation. (shrink)