At the end of the 19th-century three technologies had emerged as sources of motive power for the automobile: steam, internal combustion, and electric motors. In 1900, in the United States and around the world, each of these powered a roughly equal number of automobiles. Thus, the early period of automobile development offers fertile ground for the study of technological path choice. At that time, it appeared that the electric motor was poised to become the dominant automotive (...) technology. However, the internal combustion engine achieved this status instead. Although a large number of studies have examined the history of the automobile with a view to determining the reasons for the emergence of the internal combustion engine as the dominant technology for the car engine, no consensus has emerged of what the critical factors were. A close reexamining of the history allows us to identify the years 1900-1904 as the period during which the automobile’s technological path was determined. A review of the conditions prevailing during this period and the stages of development of the sociotechnical systems in which each of the alternative automotive technologies was embedded helps us identify the aspiration for touring as the key factor fixing the path for the technological development of the automobile from that point on. (shrink)

In this paper, we aim to provide an in-depth discussion of nickel's crucial position in the manufacturing sector in the context of the United Nations' Sustainable Development Goals (SDGs), which represent growing environmental imperatives. These SDGs have gained unprecedented urgency due to looming concerns of incompletion. It should be emphasized that the information compiled herein is derived from authoritative sources and is limited in its ability to give comprehensive coverage within the scope of this article. The raised issues are of (...) broad interest in terms of environmental dynamics in the global nickel mining, extraction, and refining arenas. As a result, the content given below may not precisely comply with the local situations dictated by geographical, geological, and socio-economic characteristics. The fundamental goal of this discussion is to clarify the economic-environmental interaction and the pragmatic meanings of the term "sustainable" in the context of the nickel industry. (shrink)

Linsky’s central point is correct; Kripke’s distinction between rigid and nonrigid designators can be extended in a straightforward way from singular terms to general terms. In both cases, for an expression to rigidly designate its extension is for it to designate the same extension with respect to every possible world-state (in which it has an extension at all). On this account, simple natural kind terms like water, gold, electricity, blue, and tiger – as well as ordinary general terms like bachelor, (...) philosopher, automobile and triangle – designate the same extension with respect to each world-state. As I see it, however, the two differ importantly in the metaphysics of their designata. Whereas a term like bachelor designates a property that may be distinguished from other properties that are necessarily coextensive with it, natural kinds differ from one another only if there are possible world-states in which some of their instances are different. Intuitively this seems plausible; it is hard to imagine two distinct species of animal, two distinct substances, or two distinct colors which have precisely the same instances in every possible world-state. This is important for my linguistic model. Consider, for example, the color blue (which I take to be a natural kind). Color science tells us that the object-color blue is determined.. (shrink)

In the last decade there has been an upsurge in the popularity of electric mountain bikes. However, opinion is divided regarding the implications of this emerging technology. Critics warn of the dangers they pose to landscapes, habitats, and ecological diversity, whilst advocates highlight their potential in increasing the accessibility of the outdoors for riders who would otherwise be socially and/or physically excluded. Drawing on interview data with 30 electric mountain bike users in England, this paper represents one of (...) the first attempts to empirically explore the experiential, ecological and socio-cultural implications of this activity. Utilising Stiegler’s (2013a) account of the pharmakon, in which technology is positioned as both remedy and poison, we suggest that the e-mountain bike’s role in the promotion of social and environmental responsibility is both complex and contradictory. Specifically, findings indicate that while this assistive technology can play a key role in facilitating deeper connections between riders as well as an ethic of care towards others, it can, at the same time, generate more individualised and automated experiences of recreational mobility in outdoor environments. (shrink)

This paper argues that cultural analyses of electric light, including aspects of actor-network theory, may raise the spectre of complexity, but do not do it justice when they omit to provide analysis of the intertwined roles of culture and political economy in the formation of the provision and use of electric light. The essay looks at the marketization of electric power, at outages in the eastern and western US megacities, at the collapse of the public utility model (...) and chaotic implementation of market models in Mumbai, Lagos and other poor megacities, and concludes that while theft of power provides a temporary solution, abandoning centralized market models in favour of microgrids is the only sure way to return agency to slum dwellers. (shrink)

Neuroscience has studied deductive reasoning over the last 20 years under the assumption that deductive inferences are not only de jure but also de facto distinct from other forms of inference. The objective of this research is to verify if logically valid deductions leave any cerebral electrical trait that is distinct from the trait left by non-valid deductions. 23 subjects with an average age of 20.35 years were registered with MEG and placed into a two conditions paradigm (100 trials for (...) each condition) which each presented the exact same relational complexity (same variables and content) but had distinct logical complexity. Both conditions show the same electromagnetic components (P3, N4) in the early temporal window (250–525 ms) and P6 in the late temporal window (500–775 ms). The significant activity in both valid and invalid conditions is found in sensors from medial prefrontal regions, probably corresponding to the ACC or to the medial prefrontal cortex. The amplitude and intensity of valid deductions is significantly lower in both temporal windows (p = 0.0003). The reaction time was 54.37% slower in the valid condition. Validity leaves a minimal but measurable hypoactive electrical trait in brain processing. The minor electrical demand is attributable to the recursive and automatable character of valid deductions, suggesting a physical indicator of computational deductive properties. It is hypothesized that all valid deductions are recursive and hypoactive. (shrink)

The importance of electrical signalling in bacteria is an emerging paradigm. Bacillus subtilis biofilms exhibit electrical communication that regulates metabolic activity and biofilm growth. Starving cells initiate oscillatory extracellular potassium signals that help even the distribution of nutrients within the biofilm and thus help regulate biofilm development. Quorum sensing also regulates biofilm growth and crucially there is convergence between electrical and quorum sensing signalling axes. This makes B. subtilis an interesting model for cell signalling research. SpoOF is predicted to act (...) as a logic gate for signalling pathway convergence, raising interesting questions about the functional nature of this gate and the relative importance of these disparate signals on biofilm behaviour. How is an oscillating signal integrated with a quorum signal? The model presented offers rich opportunities for future experimental and theoretical modelling research. The importance of direct cell‐to‐cell electrical signalling in prokaryotes, so characteristic of multicellular eukaryotes, is also discussed. (shrink)

The potential of a static electric charge located in a Schwarzschild gravitational field is given by Linet. The expressions for the field lines derived from this potential are calculated by numerical integration and drawn for different locations of the static charge in the gravitational field. The field lines calculated for a charge located very close to the central mass can be compared to those calculated by Hanni–Ruffini. Maxwell equations are used to analyze the dynamics of the falling electric (...) field in a gravitational field. (shrink)

The automobile as an object of consumption, carrying meanings and identities, has evolved through three ages during the 20th century, each characterized by a peculiar cultural logic. In the age of class distinction, the car served as a status symbol of the sort theorized by Pierre Bourdieu. It marked out differences between classes, while simultaneously misrecognizing and legitimating their origins. In the age of mass individuality, the car was a reified consumer commodity, as postulated by the theory of the (...) Frankfurt School. It served to obscure qualitative class differences underneath the illusion of mass individuality, in which consumers varied by the quantity of desired automotive traits they could afford. In the age of subcultural difference, the car expressed the different identities of lifestyle groups in a leveled and pluralized consumer culture, as theorized by postmodernism. The extension of the cultural logic of each of these automotive ages ultimately contradicted its configuration, and pushed the car forward to the next age. (shrink)

This article aims to study the simulation and design of automobile automatic clutch under mechatronics. A new control strategy for the automatic clutch of the electromagnetic transmission is proposed. The clutch mechanism model, clutch drive model, clutch system model, and internal combustion engine model are constructed. The fuzzy logic control performance of the automatic clutch was verified in different operating modes, including starting on flat roads and mountain roads. The method provides a reasonable reference for the design of an (...) automatic clutch of electromagnetic continuously variable transmission. (shrink)

Déjà vu and involuntary autobiographical memories (IAM) can be induced by intracranial electric brain stimulation in epileptic patients, sometimes in the same individual. We suggest that there may be different types of IAM which should be taken into account and provide several ideas to test the hypothesis of a continuity between IAM and déjà vu phenomena.

This article analyses the contested adoption of electric lights by the Spanish Catholic church during the Bourbon Restoration era. Through a careful reading of primary sources, namely Catholic popular magazines, and official documents, it will show how Catholic authorities and practitioners resisted, negotiated and, ultimately, engaged with electricity in religious spaces. The article argues that electric light contributed to wider exchanges in a non-monolithic Spanish Catholicism on the observance of traditional values or the possibilities of the church’s modernization. (...) However, amid a particularly tense moment regarding the secular–clerical relations, the systematic use of electric lights in churches at the turn of the twentieth century—but also in other public ceremonies—contributed to the making of religious sensations aimed at attracting new believers and reasserting the presence of the institution in a disputed public space. (shrink)

The appearance of Priestley's electrical work as a brief and irrelevant prelude to his more substantial chemical enquiries may explain why it has been strangely overlooked by historians of science. It was only fairly recently that Sir Philip Hartog sought to rectify this situation with the affirmation that ‘Priestley's electrical work offers the key to Priestley's scientific mind’. Attacking traditional chemical historiography for tracing Priestley's opposition to Lavoisier's theory to a deficiency in his scientific sensibilities, Hartog insisted that Priestley's natural (...) philosophy can properly be understood only in relation to his ‘profound convictions on scientific method’ as fully expressed in the History of electricity. Only thus would Priestley's scientific thought be related correctly to his ‘work as a whole’. (shrink)

This article examines in detail a remarkable but short-lived cosmological theory of 1959. The theory depended crucially on a hypothesis that could be, and was, tested in the laboratory. I use the case to discuss the nature of testing in cosmology and to argue against ideas about astronomy suggested by Ian Hacking. The case of the electrical universe exemplifies how disagreements can be settled by good experiments and also how experiments of wide-ranging theoretical significance need not be biased by either (...) theory or the experimentalists’ predisposed ideas. I argue that the episode supports Allan Franklins “evidence model” and disputes accounts based on the sociology of scientific knowledge. (shrink)

Price is a central analytic concept in both neoclassical and old institutional economics. Combining the social network perspective with old and new institutionalist approaches to price formation, this article examines technological, economic, institutional, and political factors that shaped the earliest pricing systems for electricity used in the United States, between 1882 and 1910. We show that certain characteristics of electricity supply led to ambiguities in how the product should be priced, which created a politics of pricing among electricity producers. In (...) particular, we investigate why the “Wright system,” arguably inferior in productive efficiency to other alternatives, was widely adopted by 1900. We argue that this outcome resulted in part from the political and organizational clout of its supporters, as well as from their particular conceptions of the boundaries and future of the industry itself. The Wright system best suited the “growth dynamic” strategy promoted by the managers of large central stations in their fierce competition with smaller and more decentralized installations. Thus, even in this apparently highly technical and mainly economic issue of how to price the product, there was ample room for social construction and political manipulation. The outcome reached was by no means inevitable and had a highly significant impact on the shape of the American industrial infrastructure. (shrink)

Wind turbines have been used by many groups of humans for many centuries. Wind turbines have allowed groups of humans to perform many different tasks in the past. However, only a century and a half ago, they began to be used to convert the energy captured from wind into electric energy. Moreover, only approximately twenty-five years ago, we started to introduce on a massive scale the energy generated from wind turbines into the electric networks of most developed countries (...) in the world for regular consumption. According to 2017 statistics, approximately 12 percent of the electric energy consumed in the EU is produced by wind turbines. Despite the fact that wind turbines generally appear quite similar externally—i.e., a three-blade structure, a nacelle, a tower, etc.—if we carefully examine the electric technology used within them, we find quite a wide range of technologies for energy conversion, which is a key issue in wind turbine technology. Hence, this paper adopts a dialectic perspective towards analyzing and understanding why several electric technologies coexist in wind turbine technology. We explain the specific factors that have influenced different wind turbine manufacturers to adopt different electric technologies across the last twenty-five years. We show how their actions and the technological directions that have followed have been mutually codetermined, resulting in a technological evolution that has produced today’s wind turbine variety. (shrink)

Improving the reliability of electricity supply is closely related to the national industrial economy and people’s livelihood. When procuring electricity, the large consumer faces the risk of insufficient electricity supply. Such insufficiency may be caused by the supply disruption of the upstream electricity generator and the fluctuation of electricity prices in the electricity pool. We establish an expected cost model for the large consumer and a revenue model for the electricity generator by introducing robustness and opportunity functions to analyse the (...) impact of supply disruption and price fluctuation on both members. Then, we obtain the optimal reliability level and subsidy rate. Our analytical results reveal the following points: During an electricity price fluctuation, the sufficient and necessary condition for the large consumer to expect high robustness of his own decision-making is to pay a high cost. The high uncertainty of electricity price leads to less revenue for the electricity generator; thus, the electricity generator should perform well in price forecasting. Without disruption risk, the electricity generator is reliable. Furthermore, the electricity pool is unreliable from the perspective of price. However, the electricity supply of the electricity generator is no longer reliable when considering disruption risk, whereas the electricity pool is reliable because the large consumer is tolerant of price fluctuation under this circumstance. Moreover, the impacts of market uncertainty and players’ attributes on the optimal strategies are explored. (shrink)

It may be seen, then, that if one was prepared to accept the existence of insulating sheaths on the nerves, all the arguments raised against the proposed identification of the nervous and electrical fluids, except one, could be answered satisfactorily. The single exception involved the question of how an electrical disturbance in the brain could be confined to a single nerve, and, as was indicated earlier, it was scarcely fair to hold this sort of objection against the electrical theory alone. (...) In that case, there remained no convincing argument to show why one should not accept the identification of the two fluids. On the other hand, of course, it remained an open question as to whether there was any convincing argument to show why one should accept the identification either. Galvani thought that his experiments provided just such an argument. (shrink)

Investigations with electrometers in the 1770s led Volta to envision mobile charge in electrical conductors as a compressible fluid. A pressure-like condition in this fluid, which Volta described as the fluid’s “effort to push itself out” of its conducting container, was the causal agent that makes the fluid move. In this paper I discuss Volta’s use of analogy and imagery in model building, and compare with a successful contemporary conceptual approach to introducing ideas about electric potential in instruction. The (...) concept that today is called “electric potential” was defined mathematically by Poisson in 1811. It was understood after about 1850 to predict the same results in conducting matter as Volta’s pressure-like concept—and to predict electrostatic effects in the exterior space where Volta’s concept had nothing to say. Complete quantification in addition to greater generality made the mathematical concept a superior research tool for scientists. However, its spreading use in instruction has marginalized approaches to model building based on the analogy and imagery resources that students bring into the classroom. Data from pre and post testing in high schools show greater conceptual and confidence gains using the new conceptual approach than using conventional instruction. This provides evidence for reviving Volta’s compressible fluid model as an intuitive foundation which can then be modified to include electrostatic distant action. Volta tried to modify his compressible fluid model to include distant action, using imagery borrowed from distant heating by a flame. This project remained incomplete, because he did not envision an external field mediating the heating. However, pursuing Volta’s strategy of model modification to completion now enables students taught with the new conceptual approach to add distant action to an initial compressible fluid model. I suggest that a partial correspondence to the evolving model sequence that works for beginning students can help illuminate Volta’s use of intermediate explanatory models. (shrink)

Seeking a historical-philosophical approach to science teaching, narrative texts have been used as pedagogical tools to improve the learning experience of students. A review of the literature of different types of narrative texts and their different rates of effectiveness in science education is presented. This study was developed using the so-called Historical Narrative as a tool to introduce science content from a historical-philosophical approach, aiming to discuss science as a human construction. This project was carried out in a 9th grade (...) Physics class in K-12 school, in Rio de Janeiro, Brazil. The steps involved in constructing a Historical Narrative based on the controversy over animal electrical fluid between Luigi Galvani and Alessandro Volta is reported herein. Finally, qualitative research results of the activities inspired by this Historical Narrative are presented with the purpose of answering the research question: to what extent do Historical Narratives support and enhance discussions about the Nature of Science, through teaching the scientific content in a historical-philosophical approach with 9th grade students? The results indicate that Historical Narrative, based on historical episodes, is a good “door opener” to teach scientific content in a historical-philosophical approach, introducing discussions about the Nature of Science without neglecting the scientific content or simplifying the discussions about the NOS. (shrink)

Non‐invasive brain stimulation is used to modulate brain excitation and inhibition and to improve cognitive functioning. The effectiveness of the enhancement due to transcranial direct current stimulation (tDCS) is still controversial, but the technique seems to have large potential for improvement and more specific applications. In particular, it has recently been used by athletes, both beginners and professionals. This paper analyses the ethical issues related to tDCS enhancement, which depend on its specific features: ease of use, immediate effect, non‐detectability and (...) great variability of effects. If tDCS were to become widespread, there could be some potential side effects, especially the rise of inequality in many selective competitive contexts. I discuss two possible scenarios to counter this effect: that of prohibition and that of compensation, each supported by reasons and arguments that seem plausible and worthy of consideration. In conclusion, I show why I think the scenario of compensation is the preferable one. (shrink)

Of the large industrial countries, Germany is clearly leading with regard to new renewable energy sources, occupying first rank in terms of installed capacity for wind energy and second for photovoltaics. This is not because of an exceptional natural resource base but because of public policy in this area, despite the fact that this policy was conducted in a lukewarm fashion until 1998. In any case, it led to a remarkable expansion of this sector. The Red-Green coalition, in office from (...) 1998 to 2005, developed the vision of achieving 50% and more of electricity generated from renewable energy sources by 2050, a goal that seems well accepted by the public but not by the established energy interests. There seems to be a good chance that the Conservative-Social Democratic coalition, which took office in November 2005, will continue this course. (shrink)

Steady direct current (dc) electric fields exist in many biological systems over many hours. At these times cells are dividing, differentiating, moving to final locations and extending motile processes. Each of these events may be influenced by physiological electric fields in tissue culture and when electric fields are disrupted in vivo, major developmental abnormalities arise. The likelihood of physiological electric fields playing a role in cell behaviours and some potential mechanisms are outlined.

Electricity is hidden within wires and networks only revealing its quantity and flow when metered. The making of its properties into data is therefore particularly important to the relations that are formed around electricity as a produced and managed phenomenon. We propose approaching all metering as a situated activity, a form of quantification work in which data is made and becomes mobile in particular spatial and temporal terms, enabling its entry into data infrastructures and schemes of evaluation and value production. (...) We interrogate the transition from the pre-digital into the making of bigger, more spatiotemporally granular electricity data, through focusing on those actors selling and materialising new metering technologies, data infrastructures and services for larger businesses and public sector organisations in the UK. We examine the claims of truth and visibility that accompany these shifts and their enrolment into management techniques that serve to more precisely apportion responsibility for, and evaluate the status of, particular patterns and instances of electricity use. We argue that whilst through becoming Big Data electricity flow is now able to be known and given identity in significantly new terms, enabling new relations to be formed with the many heterogeneous entities implicated in making and managing energy demand, it is necessary to sustain some ambivalence as to the performative consequences that follow for energy governance. We consider the wider application of our conceptualisation of metering, reflecting on comparisons with the introduction of new metering systems in domestic settings and as part of other infrastructural networks. (shrink)

General Electric (G.E.) has a rich history of being in the center of public discourse regarding the intersection of corporate strategy and environmental concerns. During Jeffrey Immelt’s tenure as Chief Executive Officer, G.E. has taken a proactive approach to coupling corporate social responsibility with organizational profitability in its Ecomagination initiatives. Critics abound with some investor groups questioning the utility of Immelt’s approach for shareholder returns while other stakeholder groups question G.E.’s motives and methods. This case study reviews G.E.’s past (...) CSR efforts and the more recent Ecomagination program and its efficacy and sustainability. The case was developed from public sources. (shrink)

The electric dipole moments of elementary particles, atoms, molecules, and their connection to the electric susceptibility are discussed for stationary states. Assuming rotational invariance, it is emphasized that, for such states, only in the case of a parity and time-reversal-violating interaction can the considered particles exhibit a nonvanishing expectation value for the electric dipole moment.

In this book Michael Heim provides the first consistent philosophical basis for critically evaluating the impact of word processing on our use of and ideas about language. This edition includes a new foreword by David Gelernter, a new preface by the author, and an updated bibliography. "Not only important but seminal, on the cutting-edge, furrowing new conceptual territory."-Walter J. Ong, S.J. "A philosopher ponders how the word processor has affected language use and our ideas about it. Heim shrewdly updates a (...) school of thought, associated with such thinkers as Walter Ong, that maintains all changes in writing technology tend to change the way we perceive the world. His argument that word processing leads to fragmented thinking should be addressed and debated."-Carlin Romano, Philadelphia Inquirer "The arguments range over all of Western philosophy, from the ancient Greeks to contemporary phenomenology.... Everyone who has used a word processor will find much to think about in Heim's ideas."-David Weinberger, Byte "Fascinating, clear, and well-done... stimulating and challenging."-Don Ihde, Philosophy and Rhetoric. (shrink)