WorldWideScience

Sample records for alchemy

  1. Alchemy as donum dei

    Directory of Open Access Journals (Sweden)

    Vladimir Karpenko

    1998-05-01

    Full Text Available The view of alchemy as a gift of God is traced from her origin in the Hellenistic world through the Arabic world to Latin Europe. In the course of this history the attitude towards divine intervention changed; Hermes, the legendary (semidivine founder of this science was not yet expected to intervene into the work of an alchemist. Already in the Hellenistic world alchemy became donum dei; the role of God graduated in the later cultures, and persisted surprisingly long in Latin Europe. Here, God was the decisive force presenting only selected people with his gift, the knowledge of alchemy. Crafts based on chemistry and metallurgy developed simultaneously in the same social and religious environment, but they took quite a different position - free access for people to learn all knowledge. Therefore, alchemy and crafts are to be compared also from the point of view of donum dei.

  2. Monetary Science, Fiscal Alchemy

    OpenAIRE

    Eric M. Leeper

    2010-01-01

    Monetary policy decisions tend to be based on systematic analysis of alternative policy choices and their associated macroeconomic impacts: this is science. Fiscal policy choices, in contrast, spring from unsystematic speculation, grounded more in politics than economics: this is alchemy. In normal times, fiscal alchemy poses no insurmountable problems for monetary policy because fiscal expectations can be extrapolated from past fiscal behavior. But normal times may be coming to an end: aging...

  3. Alchemy as donum dei

    OpenAIRE

    Vladimir Karpenko

    1998-01-01

    The view of alchemy as a gift of God is traced from her origin in the Hellenistic world through the Arabic world to Latin Europe. In the course of this history the attitude towards divine intervention changed; Hermes, the legendary (semidivine) founder of this science was not yet expected to intervene into the work of an alchemist. Already in the Hellenistic world alchemy became donum dei; the role of God graduated in the later cultures, and persisted surprisingly long in Latin Europe. Here, ...

  4. MARCELIN BERTHELOT AND INDIAN ALCHEMY

    OpenAIRE

    Rosu, Arion

    1986-01-01

    Based on unpublished manuscripts, the article reveals the keen interest shown by Marcelin Berthelot in Indian alchemy. The French Savant has actually inspired and encouraged the first historical research in this field, undertaken at the end of the last century, in Calcutta, by the Bengali scientist Prafulla Chandra Ray.

  5. Radiotoxicity, dose and nuclear alchemy; Radiotoxiciteit, dosis en nucleaire alchemie

    Energy Technology Data Exchange (ETDEWEB)

    Schram, R. [Nuclear Research and Consultancy Group NRG, Petten (Netherlands)

    2006-07-01

    An outline is given of the nuclear fuel cycle and related products, focusing on the radiotoxicity and radioactive waste dose. Also, it is explained how those subjects form the basis of research on transmutation and recycling of radioactive waste. Finally, attention will be paid to nuclear alchemy, i.e. the steps to be taken for transmutation and recycling, based on current developments in research at NRG. [Dutch] In dit artikel zal een toelichting worden gegeven op de splijtstofcyclus en de producten die daarbij vrijkomen. Hierbij zal worden ingegaan op de radiotoxiciteit en dosis van het radioactief anal. Tevens zal worden uitgelegd hoe deze begrippen de basis vormen voor keuzes binnen het onderzoek naar transmutatie en recycling van radioactief afval. Ook zal de nucleaire alchemie, de benodigde stappen voor transmutatie en recycling, worden behandeld aan de hand van de actuele ontwikkelingen in het onderzoek zoals onder meer uitgevoerd bij NRG.

  6. Is biotechnology the new alchemy?

    Science.gov (United States)

    Kirkham, Georgiana

    2009-03-01

    In this article I examine similarities between the science and ethics of biotechnology on the one hand, and those of alchemy on the other, and show that the understanding of nature and naturalness upon which many contemporary ethical responses to biotechnology are predicated is, in fact, significantly similar to the understanding of nature that was the foundation of the practice of alchemy. In doing so I demonstrate that the ethical issues and social responses that are currently arising from advances in the field of biotechnology are interestingly similar to those that arose in reaction to the practice and prevalence of alchemy from its inception in Europe in the mid-twelfth century until at least the early modern period. I argue that a proper conception of the ethical issues and a sensible interpretation of the power and the promise of the science of biotechnology are most likely if we understand such attitudes to nature, and to the ethical issues surrounding technological and scientific developments, in terms of an historical and cultural continuum. That is, we should regard biotechnology as merely the latest in a string of technological and scientific developments rather than, as is often alleged, as something entirely new, requiring its own special ethical response. Finally, I suggest that examining the parallels between the ethical issues generated by alchemy and by biotechnology show us that such issues are best situated and discussed within a framework of virtue ethics, as it allows us to think seriously about the relationship between art and nature and the proper role of humans in relation to their technology. PMID:19831210

  7. Educational Alchemy: The Transformation of Schools.

    Science.gov (United States)

    Mugits, Michael James

    Alchemy is the magical or mysterious power or process involving chemistry, magic, and philosophy in transforming one thing into another. The term is often used to describe the medieval study that sought to transform cheaper metals into gold or silver. "Educational alchemy" is the process by which schools are converted into more effective learning…

  8. Alchemy and the history of science. Introduction.

    Science.gov (United States)

    Moran, Bruce T

    2011-06-01

    Alchemy is part of the cultural experience of early modern Europe and yet has had to overcome problems of demarcation to be considered relevant to the history of science. This essay considers historiographical and methodological issues that have affected the gradual demarginalization of alchemy among attempts to explain, and find things out about, nature. As an area of historical study, alchemy relates to the history of science as part of an ensemble of practices that explored the natural world through natural philosophy and speculative traditions and by functioning as a nexus of social and intellectual life. PMID:21874689

  9. Technology and the Spirit of Alchemy

    Directory of Open Access Journals (Sweden)

    Giuseppe Del Re

    1997-11-01

    Full Text Available A historical perspective can throw light on problematic aspects of technology, regarded as part of the scientific approach to Nature. The master reference in this respect is chemistry, a science which still gives priority, as its mother alchemy, to the practical imitation and emulation of Nature's most secret operations. Now, the transition from the fogs of alchemy to the rigor of chemistry is often attributed to the abandonment of the religious foundations of the alchemical 'philosophy'. In this paper, we argue that, on the contrary, the complete elimination of the 'spirit of alchemy' was an unjustified loss and a premise for the misuses of technology now seriously dreaded.

  10. Cumbrian Alchemy (2012-2014)

    International Nuclear Information System (INIS)

    The Cumbrian Alchemy project explores issues emerging from an enquiry into convergent relationships among the nuclear and other energy industries, archaeological monuments and oral traditions of the North Lancashire and Cumbrian region in the north-west of England. Topically, it focuses on ideas of 'places of power', issues and discourse associated with hazardous industrial sites, long-term nuclear repositories, matters of 'deep-time' with respect to the recording and remembering of these repositories, language preservation and stewardship of the land. The project was supported by Arts Council England and the University of Cumbria

  11. Super-CI MCHF program in ALCHEMY

    International Nuclear Information System (INIS)

    A computer code is described which is used for the calculation of multiconfiguration Hartree-Fock wavefunctions, and is available in the ALCHEMY set of programs. It is routinely used for problems involving up to 100 CSF's

  12. Alchemy--A History of Early Technology.

    Science.gov (United States)

    Pollard, A. M.

    1988-01-01

    Reviews the history of alchemy including personalities and methods. Discusses the philosophy associated with various early chemists and alchemists. Attempts to show that it was not unreasonable for ancient alchemists to believe in the possibility of transmutation. (CW)

  13. Art & Alchemy

    DEFF Research Database (Denmark)

    Partly because of alchemy's dismissal from the Parnassus of rational sciences, the interplay between this esoteric knowledge and the visual arts is still a surprisingly neglected research area. This collection of articles covering the time span from the Late Middle Ages to the twentieth century...... intends, however, to challenge the current neglect. Areas on which its twelve authors cast new light include alchemical gender symbolism in Renaissance, Mannerist and modernist art, alchemical ideas of transformation in Italian fifteenth-century landscape imagery, Netherlandish seventeenth......-century portrayals of alchemists, and alchemy's tortured status as a forerunner of photography. Art and Alchemy indicates that alchemy indeed has several connections with art by examining some of the pictorial and literary books that disseminated alchemical symbols and ideas, delving into images, which in one way or...

  14. Technology and the Spirit of Alchemy

    OpenAIRE

    Giuseppe Del Re

    1997-01-01

    A historical perspective can throw light on problematic aspects of technology, regarded as part of the scientific approach to Nature. The master reference in this respect is chemistry, a science which still gives priority, as its mother alchemy, to the practical imitation and emulation of Nature's most secret operations. Now, the transition from the fogs of alchemy to the rigor of chemistry is often attributed to the abandonment of the religious foundations of the alchemical 'philosophy'. In ...

  15. The modern alchemy: The chemical industry

    International Nuclear Information System (INIS)

    A brief history is presented on the development of chemistry from the antiquity, through alchemy, iatrochemistry, electrochemistry, atomic theory and the XVII, XVIII, XIX and X X centuries discoveries up to modern chemistry, fine chemistry, chemical engineering and the modern chemical industry with all of its consequences

  16. Progress in ALCHEMI analysis of crystal structure

    International Nuclear Information System (INIS)

    The atomic location by channeling-enhanced microanalysis (ALCHEMI) is an effective technique to clarify the atomic configuration in multi-component compounds. Recent development of the theory on the characteristic x-ray emission has made ALCHEMI a more reliable and expansive technique. On this revised ALCHEMI, the characteristic x-ray intensities are measured at various electron-incidence directions in a transmission electron microscope, and are compared with x-ray intensities calculated from dynamical electron diffraction and inelastic scattering theories. On the present work, this technique was applied to thermoelectric materials. The occupation probabilities of Mn atoms on Fe I and Fe II sites in a thermoelectric semiconductor Fe0.97Mn0.03Si2 of a β-FeSi2 structure were 0.434 and 0.574, respectively. As another example, the occupancy of Ce atoms on voids and the coordinates (z1, z2) of Sb atoms in Ce0.5Fe3NiSb12 of a skutterrudite CoSb3 structure was determined to be 0.33 and (z1=0.336, z2=0.147), respectively. (Y.K.)

  17. Die Alchemie und der Prager Hof Kaiser Rudolfs II

    Czech Academy of Sciences Publication Activity Database

    Karpenko, V.; Purš, Ivo

    Wiesbaden: Harrassowitz , 2014 - (Feuerstein-Herz, P.; Laube, S.), s. 129-138 ISBN 978-3-447-10251-3 Institutional support: RVO:68378033 Keywords : Rudolf II * alchemy * history of culture Subject RIV: AL - Art, Architecture, Cultural Heritage

  18. Simulation of cross sections for practical ALCHEMI

    International Nuclear Information System (INIS)

    Full text: Precisely known atomic scattering factors are essential for accurate atom location by channeling enhanced microanalysis (ALCHEMI) based on inner-shell ionization. For ALCHEMI using energy dispersive x-ray analysis (EDX), first principles calculations of ionization cross sections, realistically modelling the 'delocalization' of the ionization interaction, give excellent agreement with experiment. Such calculations are complex and computationally intensive. Hence, simple analytic forms are often assumed to describe the ionization potential. Such an approach assumes that the precise shape of the ionization potential is not important but that at least the half width at half maximum (HWHM) should be accurately estimated, for example using estimates of the HWHM from root-mean-square impact parameters for ionization. However this is generally not a good approximation and we have provided more realistic estimates. These are based on accurate atomic scattering form factors for ionization that have been calculated from first principles using relativistic Hartree-Fock wave functions for bound states and Hartree-Slater wave functions for the continuum states. The effective ionization interaction may be approximated by an equivalent local potential. The scattering factors have been calculated for K-shell ionization for elements in the range Z= 6 (carbon) to Z = 50 (tin) and for Z-shell ionization in the range Z = 20 (calcium) to Z = 60 (neodymium). Accurate values of the scattering factors can be obtained by interpolation for incident electron energies between 50 and 400 keV. The utility of these form factors is illustrated, using some data obtained by Matsumura and coworkers during their project to investigate radiation-induced disordering in magnesium aluminate spinel. High angular resolution electron channeling x-ray spectroscopy was employed to investigate ion displacements in MgOnAl2O3 (n = 1.0 and 2.4) irradiated with 1 MeV Ne+ ions or 900 keV electrons at 873

  19. Book Review: Rudolf Steiner - Alchemy of the Everyday

    OpenAIRE

    Paull, John

    2012-01-01

    'Rudolf Steiner - Alchemy of the Everyday' presents an overview of Steiner’s life work. Steiner was a pioneer of New Age thinking. He had a prodigious appetite for work, and his output was prolific as well as diverse. He presented over 5105 lectures and he authored 354 books. Alchemy encapsulates Steiner’s oeuvre including architecture, furniture, art, painting, sculpture, dance, jewellery, typography, medicine, education, and agriculture. As the Foreword states: “Rudolf Steiner was one of th...

  20. 78 FR 25529 - Requested Administrative Waiver of the Coastwise Trade Laws: Vessel ALCHEMY; Invitation for...

    Science.gov (United States)

    2013-05-01

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Maritime Administration Requested Administrative Waiver of the Coastwise Trade Laws: Vessel ALCHEMY... of the vessel ALCHEMY is: Intended Commercial Use of Vessel: ``Uninspected six-pack sailing...

  1. The Phenomenon of Alchemy in the Temporal, Spatial and Mental Dimensions of the Old World

    OpenAIRE

    Rodyhin, Kostiantyn; Rodyhin, Mykhailo

    2013-01-01

    The paper deals with the phenomenon of alchemy in the temporal, spatial and mental dimensions of the Old World. The comparative analysis of the typical features of alchemy reveals the essential unity of this phenomenon in the West and the East. The authors consider the polycentric model of the origin of alchemy to be probable. Alchemy in all the variety of manifestations is focused on obtaining an unlimited resource - material, temporal, creative etc. The specifics of the manifestations of al...

  2. Novel Catalysis by Gold: A Modern Alchemy

    Science.gov (United States)

    Haruta, Masatake

    Gold has long been neglected as a catalyst because of its chemical inertness. However, when gold is deposited as nanoparticles on carbon and polymer materials as well as on base metal oxides and hydroxides, it exhibits unique catalytic properties for many reactions such as CO oxidation at a temperature as low as 200 K, gas phase direct epoxidation of propylene, and aerobic oxidation of glucose to gluconic acid. The structure-catalytic activity correlations are discussed with emphasis on the contact structure, support selection, and the size control of gold particles. Gold clusters with diameters smaller than 2 nm are expected to exhibit novel properties in catalysis, optics, and electronics depending on the size (number of atoms), shape, and the electronic and chemical interaction with the support materials. The above achievements and attempts can be regarded as a modern alchemy that creates valuables by means of the noblest element with little practical use.

  3. Transmuting Sericon: Alchemy as "Practical Exegesis" in Early Modern England.

    Science.gov (United States)

    Rampling, Jennifer M

    2014-01-01

    An influential strand of English alchemy was the pursuit of the "vegetable stone," a medicinal elixir popularized by George Ripley (d. ca. 1490), made from a metallic substance, "sericon." Yet the identity of sericon was not fixed, undergoing radical reinterpretation between the fifteenth and seventeenth centuries as Ripley's lead-based practice was eclipsed by new methods, notably the antimonial approach of George Starkey (1628-65). Tracing "sericonian" alchemy over 250 years, I show how alchemists fed their practical findings back into textual accounts, creating a "feedback loop" in which the authority of past adepts was maintained by exegetical manipulations--a process that I term "practical exegesis." PMID:26103745

  4. Rhetoric, Alchemy and Heuristic Procedures: Some Epistemological Questions.

    Science.gov (United States)

    Edwards, Bruce L., Jr.

    Although composition theorists have rejected the "alchemy" of the traditional, impressionistic, unscientific view of composition as product in favor of a process oriented approach, they have as yet failed to reach a consensus about the epistemological bases that undergird this shift. An examination of parallel developments in literary theory and…

  5. How the Alchemy Makes Inquiry, Evidence, and Exclusion.

    Science.gov (United States)

    Popkewitz, Thomas S.

    2002-01-01

    Modern teaching and teacher education "magically" transform sciences, social sciences, and humanities. The alchemy of school subjects provides a way to think about frames of reference organizing inquiry and constitutes evidence in teacher education, also obscuring the normalizing and dividing practices of teaching (including reformulating…

  6. Communicating about Matter with Symbols: Evolving from Alchemy to Chemistry

    Science.gov (United States)

    Fabbrizzi, Luigi

    2008-01-01

    Modern chemists know that alchemists were their historical predecessors, yet they are not proud of this relationship, which chemists today tend to hide or forget. However, no discontinuity exists between alchemy and chemistry and we still use laboratory techniques that were invented by alchemists hundreds or thousands of years ago. Alchemists used…

  7. Four Ways of Measuring the Distance between Alchemy and Contemporary Art

    OpenAIRE

    James Elkins

    2003-01-01

    Alchemy has always had its ferocious defenders, and a small minority of artists remain interested in alchemical meanings and substances. In this essay I will suggest two reasons why alchemy is marginal to current visual art, and two more reasons why alchemical thinking remains absolutely central. Briefly: alchemy is irrelevant because (1) it is has been a minority interest from early modernism to the present, and therefore (2) it is outside the principal conversations about modernism and post...

  8. Multivariate ALCHEMI in the presence of anti-site defects

    International Nuclear Information System (INIS)

    It is shown that a recently developed formulation of ALCHEMI, which takes into account the x-ray signal delocalisation effects, is not suitable for adaptation to the case of anti-site defect density determinations. However, the multivariate formulation of the method ALCHEMI is then applied to an Ni-Fe-Cr ordered alloy sample containing significant numbers of anti-site defects, and whose site distributions for all three elements were known in advance. In this way the importance of the presence of such defects is quantitatively determined for a real case. It is found that for this sample, the errors introduced are less than those arising from other sources, and it appears likely that in general the method can tolerate fairly high defect levels for compounds of host stoichiometry AxB where x is 3 or higher. (orig.)

  9. MANTRA AND YANTRA IN INDIAN MEDICINE AND ALCHEMY

    OpenAIRE

    Rosu, Arion

    1988-01-01

    This paper was presented at the International Workshop on mantras and ritual diagrams in Hinduism, held in Paris, 21-22 June1984. The complete text in French, which appeared in the Journal asiatique 1986, p.203, is based upon an analysis of Ayurvedc literature from ancient times down to the present and of numerous Sanskrit sources concerning he specialized sciences: alchemy and latrochemisry, veterinary medicine as well as agricultural and horticulture techniques.

  10. Mantra and yantra in Indian medicine and alchemy.

    Science.gov (United States)

    Rosu, A

    1988-07-01

    This paper was presented at the International Workshop on mantras and ritual diagrams in Hinduism, held in Paris, 21-22 June1984. The complete text in French, which appeared in the Journal asiatique 1986, p.203, is based upon an analysis of Ayurvedc literature from ancient times down to the present and of numerous Sanskrit sources concerning he specialized sciences: alchemy and latrochemisry, veterinary medicine as well as agricultural and horticulture techniques. PMID:22557624

  11. Alchemy in Cambridge. An Annotated Catalogue of Alchemical Texts and Illustrations in Cambridge Repositories.

    Science.gov (United States)

    Timmermann, Anke

    2015-01-01

    Alchemy in Cambridge captures the alchemical content of 56 manuscripts in Cambridge, in particular the libraries of Trinity College, Corpus Christi College and St John's College, the University Library and the Fitzwilliam Museum. As such, this catalogue makes visible a large number of previously unknown or obscured alchemica. While extant bibliographies, including those by M.R. James a century ago, were compiled by polymathic bibliographers for a wide audience of researchers, Alchemy in Cambridge benefits from the substantial developments in the history of alchemy, bibliography, and related scholarship in recent decades. Many texts are here identified for the first time. Another vital feature is the incorporation of information on alchemical illustrations in the manuscripts, intended to facilitate research on the visual culture of alchemy. The catalogue is aimed at historians of alchemy and science, and of high interest to manuscript scholars, historians of art and historians of college and university libraries. PMID:26245008

  12. Combining HYPER and Alchemy systems for learning from noisy data

    OpenAIRE

    Oblak, Andrej

    2009-01-01

    This thesis refers to the field of machine learning. It concentrates on the use of inductive logic programming (ILP) for learning hypotheses from noisy data. We used ILP program HYPER, which is not actually able to learn from noisy data, so for this purpose we had to modify it accordingly. We named this modified version HYPER/N. But since HYPER/N also learns hypotheses, which are a result of some random dependencies in learning data, we had to evaluate learned hypotheses with Alchemy - a syst...

  13. Modern Alchemy: Solidifying high-level nuclear waste

    International Nuclear Information System (INIS)

    The U.S. Department of Energy is putting a modern version of alchemy to work to produce an answer to a decades-old problem. It is taking place at the Savannah River Site (SRS) in Aiken, South Carolina and at the West Valley Demonstration Project (WVDP) near Buffalo, New York. At both locations, contractor Westinghouse Electric Corporation is applying technology that is turning liquid high-level radioactive waste (HLW) into a stabilized, durable glass for safer and easier management. The process is called vitrification. SRS and WVDP are now operating the nation''s first full-scale HLW vitrification plants

  14. Four Ways of Measuring the Distance between Alchemy and Contemporary Art

    Directory of Open Access Journals (Sweden)

    James Elkins

    2003-03-01

    Full Text Available Alchemy has always had its ferocious defenders, and a small minority of artists remain interested in alchemical meanings and substances. In this essay I will suggest two reasons why alchemy is marginal to current visual art, and two more reasons why alchemical thinking remains absolutely central. Briefly: alchemy is irrelevant because (1 it is has been a minority interest from early modernism to the present, and therefore (2 it is outside the principal conversations about modernism and postmodernism; but alchemy is central because (3 it provides the best language to explain the fascination of oil paint, and (4 it is one of the best models for understanding the contemporary aversion to full logical or rational sense.

  15. The Phenomenon of Alchemy of the West in the Diachronic Dimension

    OpenAIRE

    Rodyhin, Kostiantyn

    2013-01-01

    The article deals with the phenomenon of alchemy in the diachronic dimension. The authors analyse the specifics of its sociocultural being. The interrelationship and succession between the Hellenistic, Arabic and European alchemy allow to consider them as the stages of the genesis of the essentially single phenomenon. Also, they can be considered as the links of one tradition that can be called the Western one. It is shown that a mystical and esoteric character is an invariant feature of alch...

  16. THE SINO-INDIAN ORIGIN OF CHEMEIA AND CHUMEIA AS SYNONYMS IN GREK, SIGNIFYING ALCHEMY

    OpenAIRE

    Mahdihassan, S.

    1984-01-01

    In China the antecedent of alchemy is represented by the god of longevity emerging from the peach. The first synthetic drug, Kim-Yeh, red colloidal gold, signified gold-cum -herbal juice. Kim-Yeh=Kimiya (Arabic) =chemeia (Greek). Translated this gave Chrusozomion=Gold Ferment, specifying the drug. Rasayana was translated as Chumeia, herbal juice-incorporate and signified the art alchemy. Chemeia was Chinese and Chumeia, Indian. Originally each signified both, a drug of longevity and the art, ...

  17. ALCHEMI: a new technique for locating atoms in small crystals

    International Nuclear Information System (INIS)

    Atom Location by Channelling Enhanced Microanalysis (ALCHEMI) is a quantitative technique for identifying the crystallographic sites, distribution and types of substitutional impurities in many crystals. The method involves no adjustable parameters, can be applied to areas as small as a few hundred Angstroms and to impurity concentrations down to about 0.1 atomic per cent. It is capable of distinguishing neighbours in the periodic table. The method uses the incident electron beam orientation dependence of characteristic X-ray emission and uses an energy dispersive X-ray microanalyser fitted to a transmission electron microscope. The method does not require the specimen thickness or precise orientation to be known, and makes few assumptions about the form of the dynamical electron wavefunction, which need not be calculated or predicted. The classical problems of cation ordering in spinels, feldspars and olivine have now been studied by this method. (author)

  18. Digital Alchemy for Materials Design: Colloids and Beyond

    Science.gov (United States)

    van Anders, Greg; Klotsa, Daphne; Karas, Andrew; Dodd, Paul; Glotzer, Sharon

    Starting with the early alchemists, a holy grail of science has been to make desired materials by manipulating basic building blocks. Building blocks that show promise for assembling new complex materials can be synthesized at the nanoscale with attributes that would astonish the ancient alchemists in their versatility. However, this versatility means that connecting building-block attributes to bulk structure is both necessary for rationally engineering materials and difficult because building block attributes can be altered in many ways. We show how to exploit the malleability of colloidal nanoparticle ``elements'' to quantitatively link building-block attributes to bulk structure through a statistical thermodynamic framework we term ``digital alchemy''. We use this framework to optimize building blocks for a given target structure and to determine which building-block attributes are most important to control for self-assembly, through a set of novel thermodynamic response functions. We thereby establish direct links between the attributes of colloidal building blocks and the bulk structures they form. Moreover, our results give concrete solutions to the more general conceptual challenge of optimizing emergent behaviors in nature and can be applied to other types of matter.

  19. Whole-organ bioengineering: current tales of modern alchemy.

    Science.gov (United States)

    Moran, Emma C; Dhal, Abritee; Vyas, Dipen; Lanas, Angel; Soker, Shay; Baptista, Pedro M

    2014-04-01

    End-stage organ disease affects millions of people around the world, to whom organ transplantation is the only definitive cure available. However, persistent organ shortage and the resulting widespread transplant backlog are part of a disturbing reality and a common burden felt by thousands of patients on waiting lists in almost every country where organ transplants are performed. Several alternatives and potential solutions to this problem have been sought in past decades, but one seems particularly promising now: whole-organ bioengineering. This review describes briefly the evolution of organ transplantation and the development of decellularized organ scaffolds and their application to organ bioengineering. This modern alchemy of generating whole-organ scaffolds and recellularizing them with multiple cell types in perfusion bioreactors is paving the way for a new revolution in transplantation medicine. Furthermore, although the first generation of bioengineered organs still lacks true clinical value, it has created a number of novel tissue and organ model platforms with direct application in other areas of science (eg, developmental biology and stem cell biology, drug discovery, physiology and metabolism). In this review, we describe the current status and numerous applications of whole-organ bioengineering, focusing also on the multiple challenges that researchers have to overcome to translate these novel technologies fully into transplantation medicine. PMID:24486135

  20. Least-squares axial ALCHEMI for Nb site determination in a TiAl intermetallic alloy

    International Nuclear Information System (INIS)

    Light element intermetallic alloys have attracted considerable attention amongst material scientist because of their high strength at elevated temperatures. For alloys of Ti and Al, for example, it has been found that the addition of a few atomic percent of niobium significantly improves the room temperature strength and ductility. The determination of the atomic percent present, and the distribution of the niobium atoms in TiAl alloys is thus an important problem. In this paper the authors describe the application of the Atom Location by Channelling Enhanced Microanalysis (ALCHEMI) technique to a metastable TiAl alloy (CsCl structure) containing niobium. The aim of the work is to determine the crystallographic site of the Nb, using both the ratio and the statistical ALCHEMI analysis methods. In addition, the authors discuss the problems associated with the application of the ALCHEMI method to metals, and consider the advantages of the use of axial orientations for these materials. The localization effects are also discussed, since they influence quantitative ALCHEMI measurements

  1. The Limits of Teacher Education Reforms: School Subjects, Alchemies, and an Alternative Possibility

    Science.gov (United States)

    Popkewitz, Thomas

    2010-01-01

    Contemporary U.S. schools and professional reforms call for teachers to have greater disciplinary and pedagogical knowledge for teaching school subjects. Reform efforts leave unexamined the rules and standards of "reason" that historically order school subjects. The notion of alchemy provides an analytic "tool" to consider the processes of…

  2. The Alchemy of the Mathematics Curriculum: Inscriptions and the Fabrication of the Child

    Science.gov (United States)

    Popkewitz, Thomas

    2004-01-01

    School subjects are analogous to medieval alchemy. There is a magical change as mathematics, science, and social sciences move from their disciplinary spaces into the classroom. The educational and social psychologies have little or nothing to do with understanding disciplinary practices. They are intellectual inventions for normalizing and…

  3. Science or Pseudoscience: Does Science Education Demarcate? The Case of Chemistry and Alchemy in Teaching.

    Science.gov (United States)

    Erduran, Sibel

    Themes from history and philosophy of chemistry have traditionally been absent in chemistry education. This paper targets the problem of demarcationism within the context of chemistry and alchemy. In so doing, it argues that demarcationism can be an appropriate base for bringing the historical and philosophical aspects of the discipline of…

  4. Alchemy and Aberrant Behaviour: A Jungian Approach to Working with Boys with Behaviour Disorders

    Science.gov (United States)

    O'Dea, Robert

    2006-01-01

    Alchemy is an ancient philosophy on which the two modern day sciences of chemistry and analytical psychology are grounded. In education in New South Wales (NSW) at the present time, the behaviour of boys is of increasing concern to schools, to teachers, to parents and to society at large as evidenced by the over-representation of boys in school…

  5. [Carl Gustav Jung's Theatrum Mundi. Can the description of modern alchemy in Jung's Psychologie und Alchemie be really regarded as a historical reconstruction?].

    Science.gov (United States)

    Płonka-Syroka, B

    2000-01-01

    In his work, Psychologie und Alchemie, published in 1944, Jung wanted to present a reconstruction of alchemy. In order to do this he used a method of psychology, which he modified and enriched with inspirations drawn from neo-romantically-oriented German medical historiographies of the nineteen thirties. Using historical materials, he intended to demonstrate the empirical character of his Depth Psychology, a widespread concept, ingrained in our supra-personal social unconscious. The present article questions the nature of Jung's reconstruction of alchemy as historical reconstruction. The author presents the methodological bases referred to by Jung derived from his concept of medical practice and compares them with a manner of thinking typical of contemporary historical analysis. The article also presents Jung's inspirations from the medical historiography of his time, as well as the dissimilarity of his concept with the model of historical narrative construction in force in the historiography of the thirties and forties. At the same time, it presents the elements of the "romantic inheritance" in Jung's thought, drawn from the tradition of German non-materialistic medicine of the first half of the nineteenth century. PMID:11876207

  6. Children of Alchemy: (Un)Covering the Significance of the Hermetic Art in Literary Texts, East and West

    OpenAIRE

    Chung, Angela Ann Chi

    2013-01-01

    If hermetic texts are inherently “intertextual” as David Meakin has stated, then literary works referencing alchemy might also contain this same “intertextuality.” Reading such literary works together with alchemical texts would thus appear to be a fruitful endeavor. The significance of alchemy on literary works, however, has rarely been discussed, likely because a working knowledge of the hermetic art is required before undertaking any comprehensive analysis. The a...

  7. Determining the site occupancy of Ru in the L12 phase of a Ni-base superalloy using ALCHEMI

    International Nuclear Information System (INIS)

    Small additions of Ru significantly improve the high temperature creep properties of Ni-base superalloys, but the mechanism is uncertain. In order to understand the effects of adding Ru it is important to know the atomic site(s) occupied by Ru in the superalloy structure. We used the technique ALCHEMI (Atomic site Location by CHannelling Enhanced MIcroanalysis) on a Ni-base superalloy containing Ru and encountered unexpected problems. We have explained why the ALCHEMI technique cannot accurately be used with Ni-base superalloys. We then successfully applied ALCHEMI to the simpler ternary alloy Ni-19at.%Al-3at.%Ru and found that 60% of the Ru partitions to the Al sublattice in the Ni3Al γ' phase giving an absolute atomic site preference of 5:1. Assuming such site preference holds true for more complex alloys, this information can be used to better understand the role that this platinum group metals plays

  8. BASIC CONCEPTS TO BE RECKONED IN A PROPER HISTORY OF ALCHEMY

    OpenAIRE

    Mahdihassan, S.

    1986-01-01

    Use of simple synthetic drug called Chin – Yeh, Gold – plus – plant juice or red colloidal gold. Gold made body everlasting and the herbal principle, as soul, increased life-span. Dialectally it was called Kim – Iya. Arabicized as Al – Kimiya it finally appeared as Alchemy. Chin – Yeh as drug was only brick – red when mercury, and sulphur – with traces of gold were sublimated there resulted Chin – Tan, Gold – plus – cinnabar. It was blood – red and with redness as soul it became the ideal dru...

  9. Electronic modification of Cu-based chalcopyrite semiconductors induced by lattice deformation and composition alchemy

    Science.gov (United States)

    Jiang, F. D.; Feng, J. Y.

    2008-02-01

    Using first principles calculation, we systematically investigate the electronic modification of Cu-based chalcopyrite semiconductors induced by lattice deformation and composition alchemy. It is shown that the optical band gap Eg is remarkably sensitive to the anion displacement μ, resulting from the opposite shifts of conduction band minimum and valence band maximum. Meanwhile, the dependence of structural parameters of alloyed compounds on alloy composition x is demonstrated for both cation and anion alloying. The d orbitals of group-III cations are found to be of great importance in the calculation. Abnormal changes in the optical band gap Eg induced by anion alloying are addressed.

  10. THE SYMBOLS OF CREATIVE ENERGY IN THE LITERATURE ON MYSTICSM AND ON ALCHEMY

    OpenAIRE

    Mahdihassan, S.

    1989-01-01

    Alchemy as art tries to imitate creation such as spontaneous generation. The magic wands of creation, of Chinese origin, would be a compass and a triangular carpenter's square. Creation is represented by the dual-natured soul, comprising of the spirit (Ruh) and “the” soul (Nafs). The ultimate source is creative energy which emanates form the Divine word of command. Creative energy, in its non-manifest form, would be ultrasonic energy, which can be represented by a humming sourd. This would be...

  11. Electronic modification of Cu-based chalcopyrite semiconductors induced by lattice deformation and composition alchemy

    International Nuclear Information System (INIS)

    Using first principles calculation, we systematically investigate the electronic modification of Cu-based chalcopyrite semiconductors induced by lattice deformation and composition alchemy. It is shown that the optical band gap Eg is remarkably sensitive to the anion displacement μ, resulting from the opposite shifts of conduction band minimum and valence band maximum. Meanwhile, the dependence of structural parameters of alloyed compounds on alloy composition x is demonstrated for both cation and anion alloying. The d orbitals of group-III cations are found to be of great importance in the calculation. Abnormal changes in the optical band gap Eg induced by anion alloying are addressed

  12. Materials ``alchemy'': Shape-preserving chemical transformation of micro-to-macroscopic 3-D structures

    Science.gov (United States)

    Sandhage, Kenneth H.

    2010-06-01

    The scalable fabrication of nano-structured materials with complex morphologies and tailorable chemistries remains a significant challenge. One strategy for such synthesis consists of the generation of a solid structure with a desired morphology (a “preform”), followed by reactive conversion of the preform into a new chemistry. Several gas/solid and liquid/solid reaction processes that are capable of such chemical conversion into new micro-to-nano-structured materials, while preserving the macroscopic-to-microscopic preform morphologies, are described in this overview. Such shape-preserving chemical transformation of one material into another could be considered a modern type of materials “alchemy.”

  13. What kind of alchemy is attested by tenth-century Coptic manuscripts?

    Science.gov (United States)

    Richter, Tonio Sebastian

    2009-03-01

    This article places the four extant Coptic alchemical manuscripts within the context of the tradition of Coptic scientific texts. One of the manuscripts is a palimpsest written over an erased literary text, apparently in the tenth century. The other three all come from the same library, and are unlikely to be later than the mid-tenth century. Their vocabulary, form and contents are analysed, and the wonderful "machine of the sages" is introduced. It is shown that the texts most likely depend on Arabic alchemical texts, because of the number of Arabic words left in transliteration, and their style. In this case, they are the earliest witnesses to Arabic alchemy. PMID:19831257

  14. Bans, tests and alchemy: Food safety standards and the Ugandan fish export industry

    OpenAIRE

    Ponte, Stefano

    2005-01-01

    Fish exports are the second largest foreign exchange earner in Uganda. When Uganda’s fish export industry started to operate in the late 1980s and early 1990s, one may have thought that fish was being turned into gold. From an export value of just over one million US$ in 1990, the mighty Nile Perch had earned the country over 45 million US$ just six years later. But alchemy proved to be more than the quest of the philosophers’ stone to change base metals into gold. From 1997 to 2000, the indu...

  15. Responding to the Charge of Alchemy: Strategies for Evaluating the Reliability and Validity of Costing-Out Research

    Science.gov (United States)

    Duncombe, William

    2006-01-01

    Reforming school finance systems to support performance standards entails estimating the cost of an adequate education. Cost of adequacy (COA) studies have been done in more than 30 states. Recently Eric Hanushek challenged the legitimacy of COA research, calling it alchemy and pseudoscience. The objectives of this study are to present reliability…

  16. Thesis-Building: Architecture, Alchemy and the Constructive Moment(s of a Doctoral Dissertation

    Directory of Open Access Journals (Sweden)

    Willem de Bruijn

    2014-08-01

    Full Text Available This paper looks back at the long and sometimes difficult process of doing a ‘PhD’. It asks how certain ‘moments’ in the building of a doctoral thesis – moments of conception, of discovery, of despair, of truth, of revelation and of jouissance – inform the building of a thesis. By revisiting these moments, the paper traces the genesis of the author’s thesis on Architecture and Alchemy and explores the metaphor of construction encountered in the work of cultural theorist Walter Benjamin.Drawing on some of the historical sources of the thesis, in particular the emblem books of seventeenth-century alchemist Michael Maier (1568-1622, the paper argues that the above-named ‘moments’ in a PhD constitute an ensemble of impassioned investment, which can be known as the PhD-pathos. This paper, then, can be read as no more, or less, than a pathological guide to the PhD, where architecture and alchemy come into play as polar opposites in the process of construction and change that thesis-building is.

  17. Atomic configuration in bainite of a Cu45Zn40Au15 alloy examined by ALCHEMI

    International Nuclear Information System (INIS)

    The atomic configuration in the bainite of a Cu45Zn40Au15 alloy with a L21 type ordered structure in parent phase has been studied by means of ALCHEMI. Thin bainite plates which are supposed to be at early stages of formation possess the 18R type structure like the martensite of the same alloy system formed at subzero temperature. As far as electron diffraction is concerned, it appears that they inherit the ordered configuration of atoms in the parent phase completely. However, when closely examined by ALCHEMI, the atomic configuration is found to differ slightly from that in the parent phase. A part of Cu and Zn atoms in the bainite interchange their sites with each other, which are in the first nearest neighbor relation in the parent phase. This type of disordering is different from that recently observed in the martensite formed at subzero temperature and subsequently aged sufficiently at room temperature. These facts suggest that the bainite is not the martensite subjected to aging at temperature after its formation. (orig.)

  18. Light-seeds within: The alchemy of re-finding light in the world soul

    Science.gov (United States)

    Erickson, Stacy Lynn

    The light of the Anima Mundi has been repressed for over two thousand years. From a feminine in-sighting, this dissertation considers the reasons for the World Soul's repression and how her light can be renewed. The division of body and mind, image and word, physicality and spirituality, as well as nature and science has been costly, though this time of crisis also holds great opportunity to change perspective and live differently. The art of alchemy contains the secrets to transform elements in opposition into those in relationship in order to give birth to something new. Where feminine and masculine have been divorced and divided, the 'Royal Art' of alchemy seeks to renew soul in the world as an experience of life's interconnectivity and as a sacred marriage of matter and spirit. Through the four elements and three alchemical stages, this journey articulates the amorphous unconscious to evolve the light within the body of the microcosm and the macrocosm. The study's phenomenological perspective merges creative imagination with experiential gnosis in an exploration of the rich tapestry and mystery of an esoteric tradition. Through dream tending and active imagination, one connects to the subtle body, the imaginal world, and mythological regions with archetypal energies where elemental symbols are seeds. When cultivated and tended, these seeds grow into embodied feelings, visceral happenings. These experiential moments contain the revelations necessary for personal and global transmutation. Alchemy's tenet of 'as above, so below' holds a simple truth. When an individual works on her light, the Anima Mundi's light grows brighter. The alchemical process awakens love as the animating essence, the divine spark within the heart of all life---the gold in every atom of creation. Where matter and spirit conjoin, the hierosgamos reveals life's divine nature as an intimate dance and a web of interconnectivity. When lived for the sake of the whole and seen with the eyes of an

  19. Recording and Reading Alchemy and Art-Technology in Medieval and Premodern German Recipe Collections.

    Science.gov (United States)

    Neven, Sylvie

    2016-01-01

    In the Middle Ages and the premodern period knowledge of alchemical practices and materials was transmitted via collections of recipes often grouped concomitantly with art-technological instructions. In both alchemy and chemical technology particular importance is placed on artisanal and craft practices. Both are concerned with the description of colours. Both require procedures involving precise and specifically defined actions, prescriptions and ingredients. Assuming that alchemical and artistic texts have the same textual format, this raises the question: were they produced, diffused and read by the same people? This paper investigates the authorship and the context of production behind a sample of German alchemical manuscripts dating from the fourteenth to the sixteenth century. It scrutinizes their process of production, compilation and dissemination. This paper also sheds light on the various types of marginalia, and correlates them with their diverse functions. It thus delivers significant information about the readers and users of these manuscripts. PMID:27071299

  20. Some considerations concerning the alchemy of the De anima in arte alchemiae of pseudo-Avicenna.

    Science.gov (United States)

    Moureau, Sébastien

    2009-03-01

    This article explains some essential features of the alchemical doctrine of the De anima in arte alchemiae, a treatise written in Spain during the twelfth century (in Arabic, but only the Latin translation remains), and wrongly attributed to Avicenna. It shows that pseudo-Avicenna uses alchemical principles and elixir theory directly inspired by Jabirian texts, and classification of materials influenced by al-Razi. The alchemy of pseudo-Avicenna is entirely based on operations on the four elements: the alchemist has to reduce hair, blood or eggs to their elements, and isolate one of their essential properties (warmth, coldness, moisture and dryness), so that he can change the proportion of essential properties of the body he wants to transmute into gold or silver. The preparation made from hair, blood or eggs (the isolated property) is what he calls the elixir. PMID:19831259

  1. [Equivocal quintessence. Spiritual alchemy and counterfeit money in 16th-century Spain].

    Science.gov (United States)

    Tausiet, María

    2011-01-01

    One of the main obsessions of the early modern era was that of determining the notions of true and false, in order to apply them to various fields of knowledge and thus establish the divide between the lawful and unlawful. This trend was to have a particular impact on the fields of religion and science, where it became necessary to distinguish not only between true and false spirits, relics or miracles, but also between genuine and fake astrologers and alchemists. Situated in the middle ground between idealism and materialism, alchemy was prime territory for such tensions, as was demonstrated by a trial held in 1593 at the Jeronymite monastery of Santa Enracia in Saragossa, whose prior accused a friar of making "silver out of smoke and jewels from goblins". PMID:22368801

  2. Alchemy in eden: entrepreneurialism, branding, and food marketing in the United States, 1880–1920.

    Science.gov (United States)

    Lonier, Terri

    2010-01-01

    Through an investigation into the origins of American food marketing, this dissertation reveals how branding—specifically, the centennial brands Quaker Oats, Coca-Cola, and Crisco—came to underpin much of today's market-driven economy. In a manner akin to alchemy, the entrepreneurs behind these three firms recognized the inherent value of an agricultural Eden, then found ways to convert common, low-cost agricultural goods—oats, sugar, and cottonseed oil—into appealing, high-revenue branded food products. In the process, these ventures devised new demand-driven business models that exploited technology and communications advances, enabling them to tap a nascent consumer culture. Their pioneering efforts generated unprecedented profits, laid the foundation for iconic billion-dollar brands, and fundamentally changed how Americans make daily food choices. PMID:21114068

  3. Toward a Transformative Alchemy: The Phenomenology of the Event of Psychotherapy

    Directory of Open Access Journals (Sweden)

    Matthew Draper

    2015-09-01

    Full Text Available This paper takes up Jung’s concept of Alchemy and applies the theory of this transformational process to prison psychotherapy. In particular, it discusses the manifest meanings in the prison system, how those can be made present and manifest, and how psychotherapy can prove an event, a moment when transformation can take place. It then discusses the openness and closedness of the client and the therapist to the transformational possibilities of the event, and the consequences of those fluid positions. Contextualizing the degree of openness is the adjacent possible in this potentially very human form of relating, and how the apparatus of prisons situated within a broader culture informs the transformational alchemy of forensic psychotherapy. Este artículo recoge el concepto de alquimia de Jung, y aplica la teoría de este proceso transformativo a la psicoterapia de prisiones. En particular, se tratan los significados evidentes del sistema de prisiones, cómo éstos se pueden hacer presentes y evidentes, y cómo la psicoterapia puede probar un evento, un momento en el que la transformación puede tener lugar. Seguidamente analiza la apertura y cerrazón del cliente y el terapeuta a las posibilidades transformadoras del evento, y las consecuencias de esas posiciones flexibles. Contextualizar el grado de apertura es el adyacente posible en esta forma potencialmente muy humana de relacionarse, y cómo el sistema de prisiones situado en una cultura más amplia, informa de la alquimia transformacional de la psicoterapia forense. DOWNLOAD THIS PAPER FROM SSRN: http://ssrn.com/abstract=2624907

  4. "Paradoxes, absurdities, and madness": conflict over alchemy, magic and medicine in the works of Andreas Libavius and Heinrich Khunrath.

    Science.gov (United States)

    Forshaw, Peter J

    2008-01-01

    Both Andreas Libavius and Heinrich Khunrath graduated from Basel Medical Academy in 1588, though the theses they defended reveal antithetical approaches to medicine, despite their shared interests in iatrochemistry and transmutational alchemy. Libavius argued in favour of Galenic allopathy while Khunrath promoted the contrasting homeopathic approach of Paracelsus and the utility of the occult doctrine of Signatures for medical purposes. This article considers these differences in the two graduates' theses, both as intimations of their subsequent divergent notions of the boundaries of alchemy and its relations with medicine and magic, and also as evidence of the surprisingly unstable academic status of Paracelsian philosophy in Basel, its main publishing centre, at the end of the sixteenth century. PMID:18548903

  5. ALCHEMI for coexistent Heusler and half-Heusler phases in TiNi1.5Sn

    International Nuclear Information System (INIS)

    Atomic location by channeling-enhanced microanalysis (ALCHEMI) is an effective technique to clarify the atomic configurations in multicomponent compounds. Recent development of the theory on the characteristic X-ray emission has made ALCHEMI a more reliable and expansive technique. In this revised ALCHEMI, the characteristic X-ray intensities are measured at various electron-incidence directions, and are compared with the X-ray intensities calculated from first principles. In the present work, this technique was applied to coexistent Heusler and half-Heusler phases in a thermoelectric material, TiNi1.5Sn. The X-ray intensities calculated for both phases were significantly dependent on the fitting parameters of the atomic occupancy on each site and the sample thickness. Using the Levenberg-Marquardt least-squares method, the residual errors between the experimental and the calculated X-ray intensities were minimized to determine the fitting parameters quantitatively. In the Heusler phase, the ordered structure was observed because the atoms of each element almost occupy each site. On the other hand, in the half-Heusler phase, the 'Heusler-like' structure was observed because the occupation probabilities of Ni atoms on the Ni-site and on the vacancy-site were measured as 0.49±0.01 and 0.49±0.01, respectively, whereas 1 and 0 is expected for the normal half-Huesler structure

  6. Radioactive alchemy

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2014-07-15

    For any entity involved in radioactive waste management, turning lead into gold means succeeding with minimising the volumes and optimizing the long-term containment of ultimate waste to be disposed of. With this purpose, they perform R and D on different sorting, treatment and disposal technology, as explained by Frederic Plas from Andra (France), Jan Deckers from Belgoprocess (Belgium) and Wilhelm Bollingerfehr from DBE Technology (Germany). (orig.)

  7. Speedy Alchemy.

    Science.gov (United States)

    Deininger, Rolf A.; Berger, Carl F., Jr.

    1983-01-01

    Provides instructions for interfacing a pH meter directly to an Apple II microcomputer without an analog-to-digital converter. Includes program listing (with enough remark statements to make it self-documenting) in Integer Basic to display the pH readings. (Author/JN)

  8. Radioactive alchemy

    International Nuclear Information System (INIS)

    For any entity involved in radioactive waste management, turning lead into gold means succeeding with minimising the volumes and optimizing the long-term containment of ultimate waste to be disposed of. With this purpose, they perform R and D on different sorting, treatment and disposal technology, as explained by Frederic Plas from Andra (France), Jan Deckers from Belgoprocess (Belgium) and Wilhelm Bollingerfehr from DBE Technology (Germany). (orig.)

  9. Stellar Alchemy

    Science.gov (United States)

    Cassé, Michel; Lyle, Translated by Stephen

    2003-08-01

    Preface; 1. Nuclear astrophysics: defence and illustration; 2. Light from atoms, light from the sky; 3. Visions; 4. Contents of the sky: atomic sources and fountains; 5. Nuclear suns; 6. Sociology of stars and clouds; 7. Histories; 8. Ancient stars in the galactic halo; 9. Conclusion; Appendices.

  10. Nuclear alchemy

    CERN Multimedia

    Cartlidge, Edwin

    2003-01-01

    "Physicists around the world are carrying out research on 'transmutation', a technique they believe could be used to destroy large quantities of long-lived radioactive waste. [The author] reviews the prospects for this novel technology" (2 pages)

  11. Ion source chemistry - alchemy or a field that can be mastered

    International Nuclear Information System (INIS)

    By ion source chemistry, one understands all processes on sample substances, such as e.g. conversion reactions or dissociation processes in the ion source of the mass spectrometer. As thermal surface ionization plays a realtively larger role in isotope ratio measurement of solids than the use of an oven ion source with electron collision, examples of ion source chemistry with thermal ionization are considered in this report; however many of these statements can easily be applied to oven ion sources with electron collision. The literature still contains many 'recipes' for isotope ratio measurements of solids which according to the author's opinion are of alchemy nature. Only the knowledge of ion source chemistry under the appropriates conditions (e.g. whether a redox reaction of a decay reaction is present) can lead to the development of possibly simpler and also more effective specifications for the sample preparation. Only by the complete understanding of ion source chemistry too, can one optimize a mass spectrometrical measuring process and above all can assess sources of error of the method correctly. A few important parameters are discussed which can influence the result of the measured isotope ratio in the ion source, and a few aspects of the optimization of measuring processes for the isotope ratio determination are then discussed by means of examples (44Ca/40Ca, 41K/39K, 48Ca/40Ca, 7Li/6Li, 35Cl/37Cl). (orig./HK)

  12. Equivocal quintessence. Spiritual Alchemy and counterfeit money in 16th-century Spain

    Directory of Open Access Journals (Sweden)

    Tausiet, María

    2011-12-01

    Full Text Available One of the main obsessions of the Early Modern Era was that of determining the notions of true and false, in order to apply them to various fields of knowledge and thus establish the divide between the lawful and the unlawful. This trend was to have a particular impact on the fields of re ligion and science, where it became necessary to distinguish not only between true and false spirits, relics or miracles, but also between genuine and fake astrologers and alchemists. Situated in the middle ground between idealism and materialism, alchemy was prime territory for such tensions, as was demonstrated by a trial held in 1593 at the Jeronymite monastery of Santa Engracia in Saragossa, whose prior accused a friar of making «silver out of smoke and jewels from goblins».

    Una de las principales obsesiones de la Edad Moderna consistió en determinar las nociones de verdadero y falso para aplicarlas a los distintos campos del saber y, de ese modo, fundamentar la separación entre lo lícito y lo prohibido. Dicha tendencia iba a afectar especialmente a los terrenos de la religión y la ciencia, haciéndose necesario distinguir no sólo verdaderos y falsos espíritus, reliquias o milagros, sino también verdaderos y falsos astrólogos y alquimistas. Situada a caballo entre el idealismo y el materialismo, la alquimia ejemplificaba especialmente dichas tensiones, como se comprobará a través del proceso incoado en 1593 contra un fraile del monasterio jerónimo de Santa Engracia de Zaragoza, a quien su prior acusó de fabricar «plata de humo y joyas de trasgos».

  13. Atomic site location by channelling enhanced microanalysis (ALCHEMI) in γ'-strengthened Ni- and Pt-base alloys

    International Nuclear Information System (INIS)

    The additions of alloying elements to Ni- and Pt-base alloys influence the microstructure and thereby the creep properties, whereas the mechanism is uncertain. Therefore atomic site location by channelling enhanced microanalysis (ALCHEMI) was used to determine the site partitioning of ternary and quaternary alloying elements in the L12-ordered γ'-phase. Two ternary Ni-Al alloys with Cr and Ti additions were investigated. The measured site partitioning showed that Cr and Ti atoms prefer the Al-sublattice sites. For a ternary Pt-Al-Cr alloy, it was found that Cr atoms occupy Al sites. The influence of Ni as a fourth alloying element in a Pt-Al-Cr-Ni alloy on the site partitioning was also investigated. The detected results give evidence that in the quaternary alloy Cr and Ni atoms prefer the Pt sublattice. First principles calculations were used to support the experimental data

  14. In Eastern thought the Experience of the Hermetic Spiritual Alchemy, and Haci Bektas-i Veli's Makâlât

    OpenAIRE

    KURŞUNOĞLU, Mustafa Said

    2014-01-01

    This study defines the nature of eastern thought as a subjectivity by the contrast of the west objectivity. The Haci Bektas Velî's Makâlât, as an example of the eastern experiential thought that consist with hermetic tradition and spiritual alchemy is investigated. The realization of mental and spiritual experiential transformation by the taking of people from ordinary, and the determination of its system-ways which have been experienced as a results of this transformation, and finally the ex...

  15. Determination of site occupancy of additives X (X = V, Mo, W and Ti) in the Nb-Cr-X Laves phase by ALCHEMI

    International Nuclear Information System (INIS)

    Atom location by channeling enhanced microanalysis (ALCHEMI) was carried out to investigate the site occupancy of additives X (X = V, Mo, W and Ti) in the Nb-Cr-X Laves phase. In order to make clear the detailed substitutional behavior of the additives, specimens with different compositions were prepared for each system. In the C15 structure of the Laves phase, fairly strong electron channeling effects were observed under two planar channeling conditions where the incident electron beams were nearly parallel to the (400) and (220) planes. It was shown that V prefers the Cr site, while Mo, W and Ti preferentially occupy the Nb site

  16. The End of Alchemy? The Repudiation and Persistence of Chrysopoeia at the Académie Royale des Sciences in the Eighteenth Century.

    Science.gov (United States)

    Principe, Lawrence M

    2014-01-01

    The general abandonment of serious endeavor toward metallic transmutation represents a major development in the history of chemistry, yet its exact causes and timing remain unclear. This essay examines the fate of chrysopoeia at the eighteenth-century Académie Royale des Sciences. It reveals a long-standing tension between Académie chemists, who pursued transmutation, and administrators, who tried to suppress it. This tension provides background for Etienne-François Geoffroy's 1722 paper describing fraudulent practices around transmutation. Although transmutation seems to disappear after Geoffroy's paper, manuscripts reveal that most of the institution's chemists continued to pursue it privately until at least the 1760s, long after widely accepted dates for the "demise of alchemy" in learned circles. PMID:26103750

  17. Alchemy and the Teacher

    Science.gov (United States)

    Mayes, Clifford

    2003-01-01

    In order for teachers to reflect deeply upon themselves, they need powerful models and images to guide their introspection. In teacher reflectivity, as in the therapeutic processes, psychic energy must ultimately be "contained" by models and modalities that enable one to make sense out of one's inner and outer experiences. This enables those…

  18. Wall Street Alchemy.

    Science.gov (United States)

    Cobb, Brian T.; Hanna, John P.

    1998-01-01

    In the process of restructuring its debt and taking on additional debt, Franklin Pierce College (New Hampshire) accepted the consequences of a downgrade in its investment-grade rating. This resulted in a successful bond sale, with bonds carrying an insured single-A rating. Events leading up to the restructuring and credit issues considered by the…

  19. The alchemy of stars

    International Nuclear Information System (INIS)

    Developments in studies on stellar evolution during this century are reviewed. Recent considerations indicate that almost all elements between helium and zinc (a range which comprises more than 99 percent by mass of elements heavier than helium) can be synthesised in nuclear processes occurring during the late violent stages of an exploding star or supernova and a vigorous study in the new field of explosive nucleosynthesis is in progress. The process of nucleosynthesis has been classified into 8 sets of nuclear reactions, namely, (1) hydrogen burning, (2) helium burning, (3) α-process, (4) e-process, (5) s-process, (6) r-process, (7) p-process and (8) x-process. The abundance of helium and heavier elements are explained and the formation of various elements during supernova explosions is discussed. The questions regarding the appropriate astrophysical conditions for the formation of massive stars (3 to 8 times solar mass) is still unanswered. (A.K.)

  20. Visualization in Medieval Alchemy

    Directory of Open Access Journals (Sweden)

    Barbara Obrist

    2003-10-01

    Full Text Available This paper explores major trends in visualization of medieval theories of natural and artificial transformation of substances in relation to their philosophical and theological bases. The function of pictorial forms is analyzed in terms of the prevailing conceptions of science and methods of transmitting knowledge. The documents under examination date from the thirteenth to the fifteenth century. In these, pictorial representations include lists and tables, geometrical figures, depictions of furnaces and apparatus, and figurative elements mainly from the vegetable and animal realms. An effort is made to trace the earliest evidence of these differing pictorial types.

  1. Ordering of the β phase in TiNiCu and TiNiCuMn melt spun ribbons studied with the ALCHEMI technique

    International Nuclear Information System (INIS)

    Ti-25Ni-25Cu and Ti-25Ni-23Cu-2Mn (at.%) ribbons were melt spun at 26 m s-1. Transmission electron microscopy (TEM) investigations proved that the Mn addition lowers the amount and reduces the size of the β phase crystallites present in the otherwise amorphous matrix. The observations using the (1 0 0) superlattice spot proved that each crystallite forms a single antiphase domain. The planar ALCHEMI experiments at (0 0 0, 1 0 0) orientation of thin foils from as-spun ribbons confirmed a high occupancy of the Ni-rich planes by Cu and Mn additions. However, even as practically all Mn atoms found their places on the Ni-rich planes, though a small amount of Cu atoms still occupy the planes characteristic for Ti atoms. The transfer of the remaining Cu atoms from Ti {1 0 0} to Ni {1 0 0} planes might be the reason of the rise of the temperature of the start of the martensite transformation (Ms) during further heat treatment

  2. A alquimia organizacional: qualificação e construção do consentimento Organizational alchemy: managing skills and consent

    Directory of Open Access Journals (Sweden)

    Nadya Araujo Castro

    1998-10-01

    Full Text Available Dirigimos a nossa reflexão neste texto para três questões: 1 Como se têm manufaturado novas formas de consentimento em situações de reestruturação em empresas que já se caracterizavam, no contexto brasileiro, por um tipo de gestão mais moderna das relações sociais de trabalho, como é o caso de indústrias de processo na cadeia químico-petroquímica? 2 Poder-se-ia dizer que uma nova alquimia organizacional dos interesses estaria em curso, a sugerir a possível emergência de um novo regime fabril? 3 Qual o lugar das estratégias e políticas empresariais com relação à qualificação neste novo arranjo institucional de interesses? Procuramos enfrentar estas indagações através da análise de quatro estudos de caso que tipificam situações diferenciadas em termos de posição das empresas na cadeia produtiva, propriedade de capital, perfil dos mercados regionais de trabalho, contextos sindicais, natureza do regime de welfare e tipo de cultura gerencial.This article addresses three main questions: 1 Do managerial strategies in modern chemical plants produce new forms of individual consent towards organizational restructuring and intense work rationalization? 2 Is there a new institutional alchemy of interests indicating the emergence of a different kind of micro-regulatory institutions (a new factory regime? 3 What is the role of human resources politics on skills and employability in re-shaping the institutional ambience? The answers emerge from the analysis of four case studies in Brazilian chemical-petrochemical plants which typify different situations in terms of: position in the productive chain, capital property, regional labor markets, unionism, welfare regime and managerial culture.

  3. Chemistry Teaching: Science or Alchemy?

    Science.gov (United States)

    Johnstone, A. H.

    1997-01-01

    Suggests that the development of good chemistry teaching and the pursuit of research have essentially the same structure. Similarities include the need for a clear focus, efficiency in time and effort, and a direction that is more often right than wrong. (DDR)

  4. Closing the Books on Alchemy.

    Science.gov (United States)

    Kolln, Martha

    1981-01-01

    Finds serious flaws in the research asserting the uselessness of teaching grammar to composition classes. Proposes that writing teachers acknowledge the presence and importance of grammar in the writing class. (RL)

  5. The Alchemy of Action Learning

    Science.gov (United States)

    West, Penny; Choueke, Richard

    2003-01-01

    This paper examines the authors' experiences as action learning set facilitators within a public sector organisation undergoing change. Our objectives were to assist in the identification of internal and external drivers for change and to work with the set to explore how people's roles and responsibilities might be enhanced and developed in a…

  6. Synthesis and characterization of Eu3+-doped CaZrO3-based perovskite-type phosphors. Part I: Determination of the Eu3+ occupied site using the ALCHEMI technique

    International Nuclear Information System (INIS)

    Highlights: • Eu3+-doped CaZrO3-based compounds were synthesized by the solid state reaction. • PL emission intensity at 614 nm was changed by the second dopant cations. • The site substituted by Eu3+ cations was investigated by using XRD and ALCHEMI technique. • The dominant Eu3+ substitution site was found as the B site (Zr4+) in the CaZrO3. • The dominant Eu3+ substitution site could be strongly influenced by the co-dopants. - Abstract: Eu3+-doped CaZrO3, SrZrO3, and Mg2+- or Sr2+-co-doped CaZrO3 were synthesized by conventional solid state reaction and their photoluminescence (PL) properties were characterized. The Eu3+-doped CaZrO3-based compounds exhibited characteristic emissions of Eu3+ (f–f transition). The intensity of the main PL emission peak at 614 nm increased with Mg2+ co-doping, while it decreased with the amount of co-doped Sr2+. The site substituted by Eu3+ cations in the CaZrO3-based compounds was investigated by X-ray diffraction analysis and energy-dispersive X-ray analysis based on the electron channeling effects in transmission electron microscopy. The Eu3+ cations were determined to occupy mainly the B site (Zr4+) in CaZrO3. The dominant Eu3+ substitution site was also strongly influenced by the co-dopant, and the ionic radius of the co-dopant was identified as an important factor that determines the dominant Eu3+ substitution site

  7. Viridarium Chymicum: The Encyclopedia of Alchemy

    Science.gov (United States)

    Karpenko, Vladimir

    1973-01-01

    Describes a book containing the best illustrations in the history of alchemical literature, and is also considered unique because each of the 107 engravings is provided with a short Latin epigram explaining the sense of the picture. (DF)

  8. Information Alchemy: Transforming Information through Knowledge Utilization.

    Science.gov (United States)

    Backer, Thomas E.

    1993-01-01

    Provides an overview of knowledge utilization, what it encompasses, and its three waves of activity in America. Basic principles and strategies to consider are listed, and an example of how knowledge utilization is applied by the Center for Mental Health Services is given. (17 references) (EA)

  9. Rhythmical Alchemy: Village Drumming with Arthur Hull.

    Science.gov (United States)

    Hillerson, Gary R.; Hull, Arthur

    As a step toward writing a master's thesis in psychology, the connection between rhythm circles and psychotherapeutic process was explored. Arthur Hull, who experienced and preached about the healing power of rhythm for many years, was interviewed. This article recorded the interview between Arthur and the researcher. The interviewer learned that…

  10. Stellar alchemy. The celestial origin of atoms

    Science.gov (United States)

    Cassé, Michel

    Why do the stars shine? What messages can we read in the light they send to us from the depths of the night? Nuclear astrophysics is a fascinating discipline, and enables connections to be made between atoms, stars, and human beings. Through modern astronomy, scientists have managed to unravel the full history of the chemical elements, and to understand how they originated and evolved into all the elements that compose our surroundings today. The transformation of metals into gold, something once dreamed of by alchemists, is a process commonly occurring in the cores of massive stars. But the most exciting revelation is the intimate connection that humanity itself has with the debris of exploded stars. This engaging account of nucleosynthesis in stars, and the associated chemical evolution of the Universe, is suitable for the general reader.

  11. Can alchemy solve the nuclear waste problem?

    International Nuclear Information System (INIS)

    One new technology being explored to deal with highly radioactive elements that remain dangerous for thousands of years is transmutation-a modern twist on the ancient idea of transforming one element into another. This modern version of transmutation is not a new concept: transmutation is the essence of nuclear reactions. The latest idea is to harness the process not to create an explosive chain reaction, as in a nuclear weapon, or even primarily to generate power, as in a nuclear power reactor, but to transform dangerous radionuclides into less harmful elements. Last year a Los Alamos team began looking into using a particle accelerator instead of a conventional nuclear reactor to drive the transmutation process. Accelerator transmutation is being pursued elsewhere as well. The Los Alamos project envisions using a linear accelerator to generate extremely high intensities of neutrons for transmutation. The most powerful medium-energy accelerator in the world is located at Los Alamos-the Meson Physics Facility. All major components have been demonstrated individually but have yet to be tested in an integrated unit; when built, these accelerators will produce very intense beams of fast-moving protons. The beams will be directed into heavy-metal targets of lead and bismuth, where each proton will knock-out more than 50 neutrons from the target atoms. The scheme calls for the target to be surrounded by a moderator of heavy water, which would slow the neutrons so they could more easily be captured by the waste products to be transmuted-the lightweight fission products and the heavy actinides. These substances would be carried in a molten salt solution in a separate loop through the moderator. Circulation of both the moderator and the salt loop would dissipate the heat generated by the fission process in what is essentially a subcritical reactor. The paper discusses the advantages of this process and summarizes related research

  12. Alchemy and Exorcism in American Educational Thought.

    Science.gov (United States)

    Gumbert, Edgar B.

    1982-01-01

    The author presents a critique of twentieth-century behaviorism and humanism as educational theories. He argues that the techniques of both lead to unwarranted intervention in individual lives and ceaseless human engineering. (SK)

  13. Alchemy with short-lived radionuclides

    International Nuclear Information System (INIS)

    A variety of short-lived radionuclides are produced and subsequently incorporated into radiopharmaceutical compounds in the radionuclide production program currently being conducted at the Cyclotron Facility of Mount Sinai Medical Center. The recovery of high specific activity oxygen-15 labelled water prepared by means of an inexpensive system operating in conjunction with an on-line radiogas target routinely utilized for oxygen-15 labelled carbon dioxide studies is currently receiving particular attention

  14. Performance Based Education: A Social Alchemy.

    Science.gov (United States)

    Clements, Millard

    1982-01-01

    An exploration of performance-based education is focused through these questions: What image of human beings does it project? What image of professionals does it project? What purpose does it serve? What image of knowledge does it project? (CT)

  15. [The alchemy--epigenetic regulation of pluripotency].

    Science.gov (United States)

    Bem, Joanna; Grabowska, Iwona

    2013-01-01

    Embryonic stem cells (ESCs) self renew their population, also they are pluripotent which means they can differentiate into any given cell type. In specific culture conditions they remain undifferentiated. On the cellular level pluripotency is determined by many transcription factors, e.g. Sox2, Nanog, Klf4, Oct4. Epigenetic regulation is also crucial for both self renewal and pluripotency. This review focuses on epigenetic mechanisms, among them DNA methylation, posttranslational histone modifications, ATP dependent chromatin remodeling and miRNAs interactions. These mechanisms affect embryonic stem cells functions keeping them poised for differentiation. PMID:24044279

  16. Holonomic alchemy and series for $1/\\pi$

    OpenAIRE

    Cooper, Shaun; Zudilin, Wadim

    2015-01-01

    We adopt the "translation" technique to express several identities conjectured by Z.-W. Sun in http://arxiv.org/abs/1102.5649v47 by means of known formulas for $1/\\pi$ involving Domb and other Ap\\'ery-type sequences.

  17. Feminizing Science: The Alchemy of Title IX

    Science.gov (United States)

    Hausman, Patricia

    2008-01-01

    The author scrutinizes the National Academy of Sciences report "Beyond Bias and Barriers: Fulfilling the Potential of Women in Academic Science and Engineering" and its dangerous call to place the sciences under the sledgehammer of Title IX. Her findings: A one-sided, inaccurate, and internally contradictory report prepared by a committee lacking…

  18. The fine structure constant and numerical alchemy

    CERN Document Server

    Dattoli, Giuseppe

    2010-01-01

    We comment on past and more recent efforts to derive a formula yielding the fine structure constant in terms of integers and transcendent numbers. We analyse these "exoteric" attitudes and describe the myths regarding {\\alpha}, which seems to have very ancient roots, tracing back to Cabbala and to medieval alchemic conceptions. We discuss the obsession for this constant developed by Pauli and the cultural "environment" in which such an "obsession" grew. We also derive a simple formula for {\\alpha} in terms of two numbers {\\pi} and 137 only. The formula we propose reproduces the experimental values up to the last significant digit, it has not any physical motivation and is the result of an alchemic combination of numbers. We make a comparison with other existing formulae, discuss the relevant limits of validity by comparison with the experimental values and discuss a criterion to recover a physical meaning, if existing, from their mathematical properties.

  19. Alchemy of the Oracle: The Delphi Technique.

    Science.gov (United States)

    Wilhelm, William J.

    2001-01-01

    Discusses the origins and foundations of the Delphi technique. Outlines procedures for using it in research to obtain the insights of experts. Addresses limitations of the technique. (Contains 44 references.) (SK)

  20. Markov state models and molecular alchemy

    Science.gov (United States)

    Schütte, Christof; Nielsen, Adam; Weber, Marcus

    2015-01-01

    In recent years, Markov state models (MSMs) have attracted a considerable amount of attention with regard to modelling conformation changes and associated function of biomolecular systems. They have been used successfully, e.g. for peptides including time-resolved spectroscopic experiments, protein function and protein folding , DNA and RNA, and ligand-receptor interaction in drug design and more complicated multivalent scenarios. In this article, a novel reweighting scheme is introduced that allows to construct an MSM for certain molecular system out of an MSM for a similar system. This permits studying how molecular properties on long timescales differ between similar molecular systems without performing full molecular dynamics simulations for each system under consideration. The performance of the reweighting scheme is illustrated for simple test cases, including one where the main wells of the respective energy landscapes are located differently and an alchemical transformation of butane to pentane where the dimension of the state space is changed.

  1. Harmonious colors: from alchemy to science

    Science.gov (United States)

    Beretta, Giordano B.; Moroney, Nathan M.

    2012-01-01

    There is a very long tradition in designing color palettes for various applications, going back to at least the Upanishad. Although color palettes have been influenced by the available colorants, starting with the advent of aniline dyes in the late 1850s there have been few physical limits on the choice of individual colors. This abundance of choices exacerbates the problem of limiting the number of colors in a palette, i.e., in keeping them into a manageable quantity. For example, it is not practical for a car company to offer each model in hundreds of colors. Instead, for each model year a small number of color palettes is offered, each containing the colors for the body, trim, interior, etc. Another example is the fashion industry, where in addition to solid colors there are also patterns, leading to a huge variety of combinations that would be impossible to stock. The traditional solution is that of "color forecasting." Color consultants assess the sentiment or affective state of a target customer class and compare it with new colorants offered by the industry. They assemble a limited color palette, name the colors according to the sentiment, and publish their result. Textile manufacturers will produce fabrics in these colors and fashion designers will design clothes, accessories, and furniture based on these fabrics. Eventually, the media will communicate these forecasts to the consumers, who will be admired by their cohorts when they choose colors from the forecast palette, which by then is widely diffused. The color forecasting business is very labor intensive and difficult, thus for years computer engineers have tried to come up with algorithms to design harmonious color palettes, alas with little commercial success. For example, Johannes Itten's color theory has been implemented many times, but despite Itten's success in the Bauhaus artifacts, the computer tools have been of little utility. Indeed, contrary to the auditory sense, there is no known physiological mechanism sustaining harmony and the term "harmonious" just has the informal meaning of "going well together." We argue that the intellectual flaw resides in the belief that a masterful individual can devise a "perfect methodology" that the engineer can then reduce to practice in a computer program. We suggest that the correct approach is to consider color forecasting as an act of distillation, where a palette is digested from the sentiment of a very large number of people. We describe how this approach can be reduced to an algorithm by replacing the subjective process with a data analytic process.

  2. LEAD AND MERCURY EACH AS PRIME MATTER IN ALCHEMY

    OpenAIRE

    Mahdihassan, S.

    1988-01-01

    Prime Matter is matter-cum-energy. The first substance identified as such was lead. When gently heated it becomes red and redness means soul or energy so that lead was potentially red or soul-like and as such dual natured. Mercury also becomes red and can return to white metal. It was thus dual natured and was the second substance recognized as Prime Matter. First lead alone and then lead and mercury were considered as the source of all metals.

  3. Alchemy in Iowa: Arts Education at Harding Junior High School.

    Science.gov (United States)

    Vallance, Elizabeth

    1991-01-01

    Case study of an Iowa junior high school describes how the school and community identified their resources and used them to create successful arts education programs from ordinary resources. The article examines four types of commitment that shaped school practice, noting effective teaching practices and administrative policy. (SM)

  4. Primordial alchemy: a test of the standard model

    International Nuclear Information System (INIS)

    Big Bang Nucleosynthesis provides the only probe of the early evolution of the Universe constrained by observational data. The standard, hot, big bang model predicts the synthesis of the light elements (D, 3He, 4He, 7Li) in astrophysically interesting abundances during the first few minutes in the evolution of the Universe. A quantitative comparison of the predicted abundances with those observed astronomically confirms the consistency of the standard model and yields valuable constraints on the parameters of cosmology and elementary particle physics. The current status of the comparison between theory and observation will be reviewed and the opportunities for future advances outlined

  5. Courtroom Alchemy: Adequacy Advocates Turn Guesstimates into Gold

    Science.gov (United States)

    Guthrie, James W.; Springer, Matthew G.

    2007-01-01

    Beginning in the late 1960s, and accelerating unabated through to the present, plaintiffs have filed more than 125 court cases questioning the constitutionality of school district and school spending levels. Much of the litigation, particularly early on, centered on the issue of funding "equity." Few would seek to deny American public school…

  6. Muonic alchemy: Transmuting elements with the inclusion of negative muons

    Science.gov (United States)

    Moncada, Félix; Cruz, Daniel; Reyes, Andrés

    2012-06-01

    In this Letter we present a theoretical study of atoms in which one electron has been replaced by a negative muon. We have treated these muonic systems with the Any Particle Molecular Orbital (APMO) method. A comparison between the electronic and muonic radial distributions revealed that muons are much more localized than electrons. Therefore, the muonic cloud is screening effectively one positive charge of the nucleus. Our results have revealed that by replacing an electron in an atom by a muon there is a transmutation of the electronic properties of that atom to those of the element with atomic number Z - 1.

  7. Primordial alchemy: from the Big Bang to the present universe

    Science.gov (United States)

    Steigman, Gary

    Of the light nuclides observed in the universe today, D, 3He, 4He, and 7Li are relics from its early evolution. The primordial abundances of these relics, produced via Big Bang Nucleosynthesis (BBN) during the first half hour of the evolution of the universe provide a unique window on Physics and Cosmology at redshifts ~1010. Comparing the BBN-predicted abundances with those inferred from observational data tests the consistency of the standard cosmological model over ten orders of magnitude in redshift, constrains the baryon and other particle content of the universe, and probes both Physics and Cosmology beyond the current standard models. These lectures are intended to introduce students, both of theory and observation, to those aspects of the evolution of the universe relevant to the production and evolution of the light nuclides from the Big Bang to the present. The current observational data is reviewed and compared with the BBN predictions and the implications for cosmology (e.g., universal baryon density) and particle physics (e.g., relativistic energy density) are discussed. While this comparison reveals the stunning success of the standard model(s), there are currently some challenge which leave open the door for more theoretical and observational work with potential implications for astronomy, cosmology, and particle physics.

  8. The Alchemy of Mathematical Experience: A Psychoanalysis of Student Writings.

    Science.gov (United States)

    Early, Robert E.

    1992-01-01

    Shares a psychological look at student images of mathematical learning and problem solving through students' writings about mathematical experiences. The analysis is done from a Jungian psychoanalytic orientation with the goal of assisting students develop a deeper perspective from which to view their mathematics experience. (MDH)

  9. Constructing Core Journal Lists: Mixing Science and Alchemy.

    Science.gov (United States)

    Corby, Katherine

    2003-01-01

    Via an overview of core journal studies, emphasizing the social sciences and education, this review looks for best practices in both motivation and methodology. Selection decisions receive particular focus. Lack of correlation between methods is indicative of the complexity of the topic and the need for judgment in design and use. (Author)

  10. Creating new β cells: cellular transmutation by genomic alchemy.

    Science.gov (United States)

    Moss, Larry G

    2013-03-01

    To address insulin insufficiency, diabetes research has long focused on techniques for replacing insulin-producing β cells. Studies in mice have suggested that, under some conditions, α cells possess the capacity to transdifferentiate into β cells, although the mechanisms that drive this conversion are unclear. In this issue, Bramswig et al. analyzed the methylation states of purified human α, β, and acinar cells and found α cells exhibit intrinsic phenotypic plasticity associated with specific histone methylation profiles. In addition to expanding our understanding of this potential source of β cells, this compendium of carefully generated human gene expression and epigenomic data in islet cell subtypes constitutes a truly valuable resource for the field. PMID:23434598

  11. Cellular alchemy and the golden age of reprogramming.

    Science.gov (United States)

    Daley, George Q

    2012-12-01

    The 2012 Nobel Prize in Medicine or Physiology recognizes the architects of two of the great paradigm-shifting discoveries of the last half-century of biology. In experiments performed nearly 50 years apart, Gurdon and Yamanaka made feasible the reawakening of pluripotency inherent in all cells and challenged forever our notions of cellular identity. PMID:23217698

  12. Accreditation's Alchemy Hour: Riding the Wave of Innovation

    Science.gov (United States)

    Gaston, Paul L.

    2014-01-01

    This article was adapted from Paul L. Gaston's address to the 2014 annual meeting of the "Association of American Colleges and Universities." The panel session talk "Accreditation: Riding the Wave of Innovation--or Going Under?" addressed issues surrounding the many proposals for demolishing and rebuilding higher education…

  13. Of Alchemy and Authenticity: Teaching about Daoism Today

    Science.gov (United States)

    Miller, James; Siegler, Elijah

    2007-01-01

    The authors discuss the complexities and responsibilities of teaching about Daoism in contemporary North American colleges and universities. Expanding and revising the findings of Kirkland (1998), they argue that enough has changed in educational and cultural contexts to warrant new strategies for teaching about Daoism. Textbooks are now available…

  14. The Educational Leader's Alchemy: Creating the Gold Within

    Science.gov (United States)

    Sytsma, Sandra

    2009-01-01

    In going ahead and showing the way, leading can be seen as a process of changing. The busyness of day-to-day leadership in schools and other educational facilities bears witness to the necessity of leaders' "thinking on their feet" as they strive to resolve multiple issues. However, the constant pressure or stress of this lifestyle has its price…

  15. Stellar alchemy: The origin of the chemical elements

    International Nuclear Information System (INIS)

    What makes the stars shine? This question puzzled human beings for thousands of years. Early in this century, chemists and physicists discovered radioactivity, and the nuclear model of the atom was developed. Once nuclear reactions were produced in the laboratory, it did not take long before their role in stellar energy generation was realized. The theory that nuclear fusion is the source of stellar energy was developed in the 1930's. Only within the last ten years, however, have astronomical observations provided direct confirmation of these theoretical ideas. In this talk, the author describes the sequences of nuclear reactions that are believed to be responsible for power generation in stars. The ashes of these reactions are the heavy elements found on Earth and throughout the universe. The evolution and final fates of stars are examined

  16. Changing Dielectrics into Multiferroics---Alchemy Enabled by Strain

    Science.gov (United States)

    Schlom, Darrell

    2011-03-01

    Ferroelectric ferromagnets are exceedingly rare, fundamentally interesting multiferroic materials. The properties of what few compounds simultaneously exhibit these phenomena pale in comparison to useful ferroelectrics or ferromagnets: their spontaneous polarizations (Ps) or magnetizations (Ms) are smaller by a factor of 1000 or more. The same holds for (magnetic or electric) field-induced multiferroics. Recently, however, Fennie and Rabe proposed a new route to ferroelectric ferromagnets---transforming magnetically ordered insulators that are neither ferroelectric nor ferromagnetic, of which there are many, into ferroelectric ferromagnets using a single control parameter: strain. The system targeted, EuTi O3 , was predicted to simultaneously exhibit strong ferromagnetism (Ms ~ ~ ~7~μB /Eu) and strong ferroelectricity (Ps ~ ~ ~10~ μ C/cm2) under large biaxial compressive strain. These values are orders of magnitude higher than any known ferroelectric ferromagnet and rival the best materials that are solely ferroelectric or ferromagnetic. Hindered by the absence of an appropriate substrate to provide the desired compression, we show 3 both experimentally and theoretically the emergence of a multiferroic state under biaxial tension with the unexpected benefit that even lower misfits are required, thereby enabling higher quality crystalline films. The resulting genesis of a strong ferromagnetic ferroelectric points the way to high temperature manifestations of this spin-phonon coupling mechanism. Our work demonstrates that a single experimental parameter, strain, simultaneously controls multiple order parameters and is a viable alternative tuning parameter to composition for creating multiferroics. C.J. Fennie and K.M. Rabe, Phys. Rev. Lett. 97 (2006) 267602.

  17. Inner Alchemy: Transforming Dilemmas in Education Through Mindfulness

    Science.gov (United States)

    Burrows, Leigh

    2015-01-01

    This article reports on face-to-face and online qualitative research conducted with 25 teachers from 8 schools in Australia that explored their experience of mindfulness and reflection in relation to a self-identified relational dilemma with a student, colleague, or parent who was causing them concern at work. The aim of this study was to find out…

  18. Education and Alchemy: The Story of Wyndham Science.

    Science.gov (United States)

    Alexander, A. E.

    This is a critical account of the introduction of a new science curriculum in New South Wales, Australia. The introduction of the new courses is contrasted with methods used to update science courses in other countries and in other Australian States. Reactions from teachers, students, and the public are reported. Statements by the curriculum…

  19. Alchemy or Science? Compromising Archaeology in the Deep Sea

    Science.gov (United States)

    Adams, Jonathan

    2007-06-01

    In the torrid debate between archaeology and treasure hunting, compromise is often suggested as the pragmatic solution, especially for archaeology carried out either in deep water or beyond the constraints that commonly regulate such activities in territorial seas. Both the wisdom and the need for such compromise have even been advocated by some archaeologists, particularly in forums such as the internet and conferences. This paper argues that such a compromise is impossible, not in order to fuel confrontation but simply because of the nature of any academic discipline. We can define what archaeology is in terms of its aims, theories, methods and ethics, so combining it with an activity founded on opposing principles must transform it into something else. The way forward for archaeology in the deep sea does not lie in a contradictory realignment of archaeology’s goals but in collaborative research designed to mesh with emerging national and regional research and management plans.

  20. Translation as alchemy: the aesthetics of multilingualism in film

    OpenAIRE

    Serban, Adriana

    2012-01-01

    Cet article se donne pour tâche d’examiner l’esthétique du multilinguisme au cinéma. Dans un premier temps, nous allons nous pencher sur des exemples de stratégie de traduction dans plusieurs films, pour ensuite analyser Azur et Asmar (2006) de Michel Ocelot et Nostalghia (1983) et Offret (1986) d’Andreï Tarkovski. Ce n’est pas notre but de comparer les dialogues ou monologues sources avec leurs traductions vers une ou plusieurs langues, mais, plutôt, de cerner le rôle de la traduction dans l...

  1. Alchemies and Governing: Or, Questions about the Questions We Ask

    Science.gov (United States)

    Popkewitz, Thomas S.

    2007-01-01

    This article turns one of most cited philosopher's John Dewey's title, "How We Think" (1933/1998) back upon itself to consider how "thought" or "reason" are cultural practices that historically order and generate principles for reflection and action. The discussion proceeds thusly: (1) Schooling is about changing people; (2) Changing people…

  2. The Alchemy of "Costing Out" an Adequate Education

    Science.gov (United States)

    Hanushek, Eric A.

    2006-01-01

    In response to the rapid rise in court cases related to the adequacy of school funding, a variety of alternative methods have been developed to provide an analytical base about the necessary expenditure on schools. These approaches have been titled to give an aura of a thoughtful and solid scientific basis: the professional judgment model, the…

  3. Enculturation, Not Alchemy: Professionalizing Novice Writing Program Administrators.

    Science.gov (United States)

    Peters, Bradley

    1998-01-01

    Discusses a process of acculturation in three stages by which fledgling Writing Program Administrators can be transformed into change agents: (1) critically reading the program to locate key allies, potential advocates, and proven adversaries; (2) implementing changes on an infrastructural level to convert positive relations among colleagues into…

  4. Computational Alchemy: The Rational Design of New Superhard Materials

    OpenAIRE

    Teter, David Michael

    1998-01-01

    First--principles electronic structure calculations have been performed to help identify and direct the synthesis of new superhard compounds. An improved figure of merit for hardness is identified and used to show that carbon nitrides are not likely to be harder than diamond.

  5. Modern alchemy: Fred Hoyle and element building by neutron capture

    Science.gov (United States)

    Burbidge, E. Margaret

    Fred Hoyle's fundamental work on building the chemical elements by nuclear processes in stars at various stages in their lives began with the building of elements around iron in the very dense hot interiors of stars. Later, in the paper by Burbidge, Burbidge, Fowler and Hoyle, we four showed that Hoyle's "equilibrium process" is one of eight processes required to make all of the isotopes of all the elements detected in the Sun and stars. Neutron capture reactions, which Fred had not considered in his epochal 1946 paper, but for which experimental data were just becoming available in 1957, are very important, in addition to the energy-generating reactions involving hydrogen, helium, carbon, nitrogen and oxygen, for building all of the elements. They are now providing clues to the late stages of stellar evolution and the earliest history of our Galaxy. I describe here our earliest observational work on neutron capture processes in evolved stars, some new work on stars showing the results of the neutron capture reactions, and data relating to processes ending in the production of lead, and I discuss where this fits into the history of stars in our own Galaxy.

  6. Primordial Alchemy From The Big Bang To The Present Universe

    CERN Document Server

    Steigman, G

    2002-01-01

    Of the light nuclides observed in the universe today, D, 3He, 4He, and 7Li are relics from its early evolution. The primordial abundances of these relics, produced via Big Bang Nucleosynthesis (BBN) during the first half hour of the evolution of the universe provide a unique window on Physics and Cosmology at redshifts of order 10^10. Comparing the BBN-predicted abundances with those inferred from observational data tests the consistency of the standard model of cosmology over ten orders of magnitude in redshift, constrains the baryon and other particle content of the universe, and probes both Cosmology and Physics beyond their current standard models. These lectures are intended to introduce students, both of theory and observation, to those aspects of the evolution of the universe relevant to the production and evolution of the light nuclides from the Big Bang to the present. The current observational data is reviewed and compared with the BBN predictions and the implications for cosmology (e.g., universal ...

  7. Building Budgets and Trust through the Alchemy of Superintendent Leadership

    Science.gov (United States)

    Bird, James J.

    2010-01-01

    Superintendents have the burden and the opportunity to exert leadership through the budget-building process. This article details a dozen tenets which can be implemented by practicing superintendents. Doing so increases the chances of building trust among the stakeholders of administrators, staff, community, and school board members. The district…

  8. High-pressure alchemy on a small-pore zeolite

    Science.gov (United States)

    Lee, Y.

    2011-12-01

    While an ever-expanding variety of zeolites with a wide range of framework topology is available, it is desirable to have a way to tailor the chemistry of the zeolitic nanopores for a given framework topology via controlling both the coordination-inclusion chemistry and framework distortion/relaxation. This is, however, subjected to the ability of a zeolitic nanopore to allow the redistribution of cations-water assembly and/or insertion of foreign molecules into the pores and channels. Small-pore zeolites such as natrolite (Na16Al16Si24O80x16H2O), however, have been known to show very limited capacity for any changes in the confinement chemistry. We have recently shown that various cation-exchanged natrolites can be prepared under modest conditions from natural sodium natrolite and exhibit cation-dependent volume expansions by up to 18.5% via converting the elliptical channels into progressively circular ones. Here, we show that pressure can be used as a unique and clean tool to further manipulate the chemistry of the natrolite nanopores. Our recent crystallographic and spectroscopic studies of pressure-insertion of foreign molecules, trivalent-cation exchange under pressure, and pressure-induced inversion of cation-water coordination and pore geometry in various cation-exchanged natrolites will be presented.

  9. Stellar alchemy: The origin of the chemical elements

    International Nuclear Information System (INIS)

    What makes the stars shine? This question puzzled human beings for thousands of years. Early in this century, chemists and physicists discovered radioactivity; and the nuclear model of the atom was developed. Once nuclear reactions were produced in the laboratory, it did not take long before their role in stellar energy generation was realized. The theory that nuclear fusion is the source of stellar energy was initially developed in the 1930's and was elaborated in detail in the 1950's. Only within the last ten years, however, have astronomical observations provided direct confirmation of these theoretical ideas. In this paper, I describe the sequences of nuclear reactions that are believed to be responsible for the power generation in stars. The ashes of these reactions are the heavy elements that we find on earth and throughout the universe. The evolution and final fates of stars are examined. The key astronomical observations that provide support for these theoretical ideas are presented

  10. Alquimia: Isaac Newton revisitado Alchemy: Isaac Newton Revisited

    Directory of Open Access Journals (Sweden)

    Reginaldo Carmello Corrêa de Moraes

    1997-01-01

    Full Text Available Nota sobre publicações recentes que revelam aspectos pouco conhecidos da biblioteca de Newton - os numerosos textos religiosos, místicos e herméticos. Os biógrafos de Newton resistiram muito até admitir que os escritos esotéricos fossem genuíno interesse do sábio e que tivessem importância para entender sua trajetória intelectual. As publicações aqui indicadas afirmam o contrário, seguindo trilha aberta por ensaio pioneiro de J. M. Keynes (1946.A note on recent books about an unexplored side of Newton’s library: religious, mystical and hermetic texts. Newton's biographers had resisted so much to believe that esoteric writings were in Newton’s field of interest. Even if they recognized that, they didn't believe those strange works were important elements to understand his intellectual trajectory. The studies we mention here are saying just the opposite thing, exploring the way opened by the pioneer essay of J. M. Keynes (1946.

  11. Seeing in the dark -- I. Multi-epoch alchemy

    CERN Document Server

    Huff, Eric M; Mandelbaum, Rachel; Schlegel, David; Seljak, Uros; Lupton, Robert H

    2011-01-01

    Weak lensing by large-scale structure is an invaluable cosmological tool given that most of the energy density of the concordance cosmology is invisible. Several large ground-based imaging surveys will attempt to measure this effect over the coming decade, but reliable control of the spurious lensing signal introduced by atmospheric turbulence and telescope optics remains a challenging problem. We address this challenge with a demonstration that point-spread function (PSF) effects on measured galaxy shapes in current ground-based surveys can be corrected with existing analysis techniques. In this work, we co-add existing Sloan Digital Sky Survey imaging on the equatorial stripe in order to build a data set with the statistical power to measure cosmic shear, while using a rounding kernel method to null out the effects of the anisotropic PSF. We build a galaxy catalogue from the combined imaging, characterise its photometric properties, and show that the spurious shear remaining in this catalogue after the PSF ...

  12. Seeing in the dark - I. Multi-epoch alchemy

    Science.gov (United States)

    Huff, Eric M.; Hirata, Christopher M.; Mandelbaum, Rachel; Schlegel, David; Seljak, Uroš; Lupton, Robert H.

    2014-05-01

    Weak lensing by large-scale structure is an invaluable cosmological tool given that most of the energy density of the concordance cosmology is invisible. Several large ground-based imaging surveys will attempt to measure this effect over the coming decade, but reliable control of the spurious lensing signal introduced by atmospheric turbulence and telescope optics remains a challenging problem. We address this challenge with a demonstration that point spread function (PSF) effects on measured galaxy shapes in the Sloan Digital Sky Survey (SDSS) can be corrected with existing analysis techniques. In this work, we co-add existing SDSS imaging on the equatorial stripe in order to build a data set with the statistical power to measure cosmic shear, while using a rounding kernel method to null out the effects of the anisotropic PSF. We build a galaxy catalogue from the combined imaging, characterize its photometric properties and show that the spurious shear remaining in this catalogue after the PSF correction is negligible compared to the expected cosmic shear signal. We identify a new source of systematic error in the shear-shear autocorrelations arising from selection biases related to masking. Finally, we discuss the circumstances in which this method is expected to be useful for upcoming ground-based surveys that have lensing as one of the science goals, and identify the systematic errors that can reduce its efficacy.

  13. The alchemy of demand response: turning demand into supply

    Energy Technology Data Exchange (ETDEWEB)

    Rochlin, Cliff

    2009-11-15

    Paying customers to refrain from purchasing products they want seems to run counter to the normal operation of markets. Demand response should be interpreted not as a supply-side resource but as a secondary market that attempts to correct the misallocation of electricity among electric users caused by regulated average rate tariffs. In a world with costless metering, the DR solution results in inefficiency as measured by deadweight losses. (author)

  14. Electronic Visualisation in Chemistry: From Alchemy to Art

    CERN Document Server

    Harrison, Karl; Bowen, Alice M

    2013-01-01

    Chemists now routinely use software as part of their work. For example, virtual chemistry allows chemical reactions to be simulated. In particular, a selection of software is available for the visualisation of complex 3-dimensional molecular structures. Many of these are very beautiful in their own right. As well as being included as illustrations in academic papers, such visualisations are often used on the covers of chemistry journals as artistically decorative and attractive motifs. Chemical images have also been used as the basis of artworks in exhibitions. This paper explores the development of the relationship of chemistry, art, and IT. It covers some of the increasingly sophisticated software used to generate these projections (e.g., UCSF Chimera) and their progressive use as a visual art form.

  15. John Dee and the alchemists: Practising and promoting English alchemy in the Holy Roman Empire

    Science.gov (United States)

    Rampling, Jennifer M.

    2012-01-01

    This paper investigates John Dee’s relationship with two kinds of alchemist: the authorities whose works he read, and the contemporary practitioners with whom he exchanged texts and ideas. Both strands coincide in the reception of works attributed to the famous English alchemist, George Ripley (d. c. 1490). Dee’s keen interest in Ripley appears from the number of transcriptions he made of ‘Ripleian’ writings, including the Bosome book, a manuscript discovered in 1574 and believed to have been written in Ripley’s own hand. In 1583, Dee and his associate Edward Kelley left England for East Central Europe, taking with them a proportion of Dee’s vast library, including alchemical books—the contents of which would soon pique the interest of continental practitioners. Kelley used Ripley’s works, including the Bosome book, not only as sources of practical information, but as a means of furthering his own relationships with colleagues and patrons: transactions that in turn influenced Ripley’s posthumous continental reception. The resulting circulation of texts allows us to trace, with unusual precision, the spread of English alchemical ideas in the Holy Roman Empire from the late sixteenth century.

  16. Ideological Alchemy: The Transmutation of South African Didactics (and Fundamental Pedagogics) into "Apartheid Education"

    Science.gov (United States)

    Yonge, George D.

    2008-01-01

    In his response to Kruger, Le Grange claims that: (1) the South African discourse of fundamental pedagogics was closely allied with Christian National Education and functioned as a powerful educational doctrine in the service of the South African policy of apartheid education; (2) fundamental pedagogics bracketed political discourse; (3) the…

  17. Digital Alchemy: A Hermeneutic Phenomenological Investigation of Digital Storytelling for Peace and Justice

    Science.gov (United States)

    Gibbins, Thor

    2013-01-01

    This study explores the experiences of undergraduate students enrolled in an education I-Series (University of Maryland undergraduate courses designed to inspire innovation, imagination, and intellect) course, Good Stories: Teaching Stories for Peace and Justice. In this course students are asked to produce digital stories that project themes of…

  18. Quantum Theory, the Uncertainty Principle, and the Alchemy of Standardized Testing.

    Science.gov (United States)

    Wassermann, Selma

    2001-01-01

    Argues that reliance on the outcome of quantitative standardized tests to assess student performance is misplaced quest for certainty in an uncertain world. Reviews and lauds Canadian teacher-devised qualitative diagnostic tool, "Profiles of Student Behaviors," composed of 20 behavioral patterns in student knowledge, attitude, and skill. (PKP)

  19. Alchemy to reason: Effective use of Cumulative Effects Assessment in resource management

    International Nuclear Information System (INIS)

    Cumulative Effects Assessment (CEA) is a tool that can be useful in making decisions about natural resource management and allocation. The decisions to be made include those (i) necessary to construct planning and regulatory frameworks to control development activity so that societal goals will be achieved and (ii) whether or not to approve individual development projects, with or without conditions. The evolution of CEA into a more successful tool cannot occur independently of the evolution of decision making processes. Currently progress is painfully slow on both fronts. This paper explores some opportunities to accelerate improvements in decision making in natural resource management and in the utility of CEA as a tool to assist in making such decisions. The focus of the paper is on how to define the public interest by determining what is acceptable.

  20. Ordinary Alchemy: Understanding School and Community Co-Development through the Experiences of a Community School

    Science.gov (United States)

    Diaz Pineiro, Odalys Maria

    2010-01-01

    Practice and inquiry into school-community connections have been guided by problematic assumptions about the role of neighborhood schools, community based institutions, and local economic development policies in the evolution of urban communities. Formal relationships between schools and urban neighborhoods grounded in these assumptions have been…

  1. Silver to Gold: The Alchemy, Potential, and Maturing of ACES and CES.

    Science.gov (United States)

    Engels, Dennis W.; Muro, James J.

    1986-01-01

    Exponential changes in Western and international society and in American and international education afford promise, opportunity, and challenges for tomorrow's counselor. Leadership in services, teaching, research, credentialing, policy, and law all seem to be areas of potential contribution and growth for the counselors, counselor educators, and…

  2. The Alchemy of Learning and Work: Negotiating Learner Knowledge in a Global Society

    Science.gov (United States)

    Dabic, Snezana

    2008-01-01

    This article explores issues of literacy and identity of skilled migrants in an educational context in Australia as a learning society. First, it concentrates on forms of knowledge imposed on the learner and looks at how new discourses shape the self. Next, it tests the validity of the four pillars of education in the life of the learner. The…

  3. Atomic alchemy: Weak decays of muonic and pionic atoms into other atoms

    International Nuclear Information System (INIS)

    The rates of weak transitions between electromagnetic bound states, for example, (π+e-)→(μ+e-)νμ, and the exclusive weak decay of a muonic atom into an electronic atom, (Zμ-)→(Ze-)νμ bar νe, are calculated. For Z=80, relativistic effects are shown to increase the latter rate by a factor of 50 compared to the results of a nonrelativistic calculation. It is argued that the conditions for producing the muonic decay in neon gas (Z=10), where the branching ratio for the decay per captured muon is 1.7x10-9, can be realized using cyclotron traps, though the prospect for a practical experiment seems remote. In lead the same ratio would be approximately ∼1x10-6. In addition to providing detailed information on the high momentum tail of the wave functions in atomic physics, these decays of QED bound states provide a simple toy model for investigating kinematically analogous situations in exclusive heavy hadronic decays in quantum chromodynamics, such as B→K*γ or B→πeν

  4. Principles of microbial alchemy: insights from the Streptomyces coelicolor genome sequence

    OpenAIRE

    Thompson, Charles J.; Fink, Doris; Nguyen, Liem D.

    2002-01-01

    The world's most creative producers of natural pharmaceutical compounds are soil-dwelling bacteria classified as Streptomyces. The availability of the recently completed Streptomyces coelicolor genome sequence provides a link between the folklore of antibiotics and other bioactive compounds to underlying biochemical, molecular genetic and evolutionary principles.

  5. A Study of Understanding: Alchemy, Abstraction, and Circulating Reference in Tertiary Science Education

    Science.gov (United States)

    Merritt, Brett W.

    2013-01-01

    Understanding is widely touted to be of paramount importance for education. This is especially true in science education research and development where understanding is heralded as one of the cornerstones of reform. Teachers are expected to teach for understanding and students are expected to learn with understanding. This dissertation is an…

  6. Transforming Matter: A History of Chemistry from Alchemy to the Buckyball by Trevor H. Levere

    Science.gov (United States)

    Truman Schwartz, A.

    2001-08-01

    By and large, the chemistry is presented in a logical and comprehensible form. People and ideas are emphasized. However, because of Transforming Matter's brevity and its intended audience, there are inevitable oversimplifications and sins of omission. There were also a few sins of commission in the uncorrected proof that I read. On page 159 there is an implication that equilibrium does not exist in "irreversible" processes such as the precipitation of silver chloride. The author rushes through electron orbitals in one paragraph (page 178) in which he mistakenly refers to something he calls "Planck's equation" and appears to identify p orbitals with n = 2. On the next page we are told that "overlapping p orbitals produced a pi bond." True, but they can also produce a sigma bond. And on page 198 we learn that "a single Freon molecule can cause the decomposition of millions of ozone molecules." The most frequently cited estimate is 100,000 ozone molecules decomposed per Freon molecule. This may be the nit picking of a physical chemist, but it does reflect some of the hazards of trying to achieve an admirable goal--introducing readers to the fascinating history of our fascinating science.

  7. Stem cell therapy for cardiovascular disease: the demise of alchemy and rise of pharmacology.

    Science.gov (United States)

    Jadczyk, T; Faulkner, A; Madeddu, P

    2013-05-01

    Regenerative medicine holds great promise as a way of addressing the limitations of current treatments of ischaemic disease. In preclinical models, transplantation of different types of stem cells or progenitor cells results in improved recovery from ischaemia. Furthermore, experimental studies indicate that cell therapy influences a spectrum of processes, including neovascularization and cardiomyogenesis as well as inflammation, apoptosis and interstitial fibrosis. Thus, distinct strategies might be required for specific regenerative needs. Nonetheless, clinical studies have so far investigated a relatively small number of options, focusing mainly on the use of bone marrow-derived cells. Rapid clinical translation resulted in a number of small clinical trials that do not have sufficient power to address the therapeutic potential of the new approach. Moreover, full exploitation has been hindered so far by the absence of a solid theoretical framework and inadequate development plans. This article reviews the current knowledge on cell therapy and proposes a model theory for interpretation of experimental and clinical outcomes from a pharmacological perspective. Eventually, with an increased association between cell therapy and traditional pharmacotherapy, we will soon need to adopt a unified theory for understanding how the two practices additively interact for a patient's benefit. PMID:22712727

  8. The Untold Story: African American Women Administrators' Alchemy of Turning Adversity into Gold

    Science.gov (United States)

    Barksdale, Sydney Howe

    2007-01-01

    As we approach the end of the first decade of the twenty-first century, the globalization and privatization of the academy is destabilizing the patterns of university professional work developed over the past hundred years (Slaughter and Leslie, 1997). To grasp the extent of changes taking place and to understand the forces of change on women in…

  9. (Fullmetal) alchemy: the monstrosity of reading words and pictures in shonen manga

    OpenAIRE

    Gallacher, Lesley Anne

    2011-01-01

    Shonen manga (Japanese comics aimed at an audience of teenage boys) are often teeming with monsters, but the texts themselves are more monstrous still. The monstrous combinations of words and picture dispersed across the manga page seem to expose and challenge a fissure within representation itself-but productively so. Through reading a short section of Hiromu Arakawa's Fullmetal Alchemist, this paper explores the ways in which words and pictures can be combined to produce monstrous composite...

  10. Conference "The Cultural Alchemy of the Exact Sciences : Revisiting the Forman Thesis"

    CERN Document Server

    Kojevnikov, Alexei; Trischler, Helmuth; Weimar culture and quantum mechanics : selected papers by Paul Forman and contemporary perspectives on the Forman thesis

    2011-01-01

    This volume reprints Paul Forman's classic papers on the history of physics in post-World War I Germany and the invention of quantum mechanics. The Forman thesis has become famous as the first argument in favor of the cultural conditioning of scientific knowledge, in particular for its demonstration of the historical connection between the culture of Weimar Germany - known for its irrationality and antiscientism - and the emerging concept of quantum acausality.This volume reprints Paul Forman's classic papers on the history of physics in post-World War I Germany and the invention of quantum mechanics. The Forman thesis has become famous as the first argument in favor of the cultural conditioning of scientific knowledge, in particular for its demonstration of the historical connection between the culture of Weimar Germany - known for its irrationality and antiscientism - and the emerging concept of quantum acausality. At the 2007 international conference in Vancouver, Canada, leading historians of physics disc...

  11. A case of cellular alchemy: lineage reprogramming and its potential in regenerative medicine.

    Science.gov (United States)

    Asuelime, Grace E; Shi, Yanhong

    2012-08-01

    The field of regenerative medicine is rapidly gaining momentum as an increasing number of reports emerge concerning the induced conversions observed in cellular fate reprogramming. While in recent years, much attention has been focused on the conversion of fate-committed somatic cells to an embryonic-like or pluripotent state, there are still many limitations associated with the applications of induced pluripotent stem cell reprogramming, including relatively low reprogramming efficiency, the times required for the reprogramming event to take place, the epigenetic instability, and the tumorigenicity associated with the pluripotent state. On the other hand, lineage reprogramming involves the conversion from one mature cell type to another without undergoing conversion to an unstable intermediate. It provides an alternative approach in regenerative medicine that has a relatively lower risk of tumorigenesis and increased efficiency within specific cellular contexts. While lineage reprogramming provides exciting potential, there is still much to be assessed before this technology is ready to be applied in a clinical setting. PMID:22371436

  12. Transformation in Higher Education: The Inevitable Union of Alchemy and Technology

    Science.gov (United States)

    Harpur, John

    2006-01-01

    From the first time that humans drew together in learned groups of scholars and disciples, questions have been raised about the purpose, sustainability and values of such gatherings. The development of information technologies together with mass participation in Higher Education has sharpened disputes between innovation and tradition like never…

  13. The Alchemy of Art: Transforming Student Art into Science Knowledge in the Chemistry Classroom

    Science.gov (United States)

    Flores, Mickie

    2005-01-01

    Art provides students a way to visually represent their scientific knowledge and at the same time helps teachers assess student understanding. Examining a drawing allows teachers to scrutinize students' mental model of a science concept. Science can be described as a continuing process of discovering the order and recurring patterns in nature;…

  14. A study of understanding: Alchemy, abstraction, and circulating reference in tertiary science education

    Science.gov (United States)

    Merritt, Brett W.

    Understanding is widely touted to be of paramount importance for education. This is especially true in science education research and development where understanding is heralded as one of the cornerstones of reform. Teachers are expected to teach for understanding and students are expected to learn with understanding. This dissertation is an empirical study of the concept of understanding. After analyzing various constructions of understanding in current U.S. education literature, I suggest that understanding is defined by five distinct features---they are knowledge (or knowledge base), coherence, transfer, extrapolation, and cognition--- and that these features are heavily informed and shaped by the psychological sciences. This relationship is neither good nor bad, I argue, but it means that teaching for and learning with understanding are not heavily informed and shaped by, for example, the natural sciences. Drawing from historical, philosophical, and anthropological perspectives of science, but especially from the work of Bruno Latour, I enact a radical revision(ing) of psychological notions such as "abstraction" and "transfer." The two main purposes of this re-visioning are (1) to draw critical attention to particular characteristics of a cognitive learning theory that emphasizes abstract concepts, and (2) to align many of the principles and tools used in science education more closely with those used in empirical scientific research. Finally, by bringing some examples of teaching and learning from an undergraduate biology classroom into conversation with both psychological and empirical practices and perspectives, I suggest that problematizing the current construction of understanding creates much needed room in mainstream science education for more empirical forms of learning and styles of teaching. A shift to such forms and styles, I conclude, should prove to be more inclusive and less constraining for both students and teachers.

  15. Laser alchemy: direct writing of multifunctional components in a glass chip with femtosecond laser pulses

    Science.gov (United States)

    Liao, Yang; Lin, Jintian; Cheng, Ya

    2013-12-01

    Recently, hybrid integration of multifunctional micro-components for creating complex, intelligent micro/nano systems has attracted significant attention. These micro-/nano-systems have important applications in a variety of areas, such as healthcare, environment, communication, national security, and so on. However, fabrication of micro/nano systems incorporated with different functions is still a challenging task, which generally requires fabrication of discrete microcomponents beforehand followed by assembly and packaging procedures. Furthermore, current micro-/nano-fabrication techniques are mainly based on the well-established planar lithographic approach, which suffer from severe issues in producing three dimensional (3D) structures with complex geometries and arbitrary configurations. In recent years, the rapid development of femtosecond laser machining technology has enabled 3D direct fabrication and integration of multifunctional components, such as microfluidics, microoptics, micromechanics, microelectronics, etc., into single substrates. In this invited talk, we present our recent progress in this active area. Particularly, we focus on fabrication of 3D micro- and nanofluidic devices and 3D high-Q microcavities in glass substrates by femtosecond laser direct writing.

  16. Definition, Identification, Identity, and Culture: A Unique Alchemy Impacting the Success of Gifted African American Millennial Males in School

    Science.gov (United States)

    Bonner, Fred A., II; Lewis, Chance W.; Bowman-Perrott, Lisa; Hill-Jackson, Valerie; James, Marlon

    2009-01-01

    This article focuses on the underrepresentation of African American males in gifted and talented programs, and offers a number of key recommendations to practitioners and researchers who seek viable strategies to circumvent this problem. Beyond the focus on underrepresentation, several additional topics for discussion are excogitated to provide a…

  17. ALCHEMY: a reliable method for automated SNP genotype calling for small batch sizes and highly homozygous populations

    OpenAIRE

    Mark H Wright; Tung, Chih-Wei; Zhao, Keyan; Reynolds, Andy; Susan R McCouch; Bustamante, Carlos D.

    2010-01-01

    Motivation: The development of new high-throughput genotyping products requires a significant investment in testing and training samples to evaluate and optimize the product before it can be used reliably on new samples. One reason for this is current methods for automated calling of genotypes are based on clustering approaches which require a large number of samples to be analyzed simultaneously, or an extensive training dataset to seed clusters. In systems where inbred samples are of primar...

  18. Lighting market alchemy: Will we find a pot of gold at the end of the III-V rainbow?

    Science.gov (United States)

    Conway, Kathryn M.

    2004-12-01

    With a focus on visible spectrum light emitting diodes (LEDs), three questions frame this update. First, what are the market and financial outlooks for light-producing compound semiconductor materials and devices? Second, which applications offer the greatest growth potential for the next five to ten years and with which technologies will they likely compete for market share? Third, how can photonics experts contribute to accelerated successes for LEDs and other solid-state lighting technologies such as quantum dots? Using the rainbow as a metaphor for the market, the author examines developments in single color, multiple color and "white light" products.

  19. Cultural and Linguistic Alchemy: Mining the Resources of Spanish-Speaking Children and Families Receiving Early Intervention Services

    Science.gov (United States)

    Puig, Victoria I.

    2012-01-01

    This study was designed to gain insight into how early intervention (EI) services incorporate the cultural and linguistic resources of families and how EI professionals and families build partnerships with each other. Through observation and interview, the author looked deeply at the experiences of a small group of culturally and linguistically…

  20. ["The multiple science instructional curious artist". Alchemy, folk magic and folk medicine in baroque home reference books].

    Science.gov (United States)

    Priesner, Claus

    2011-01-01

    Germany's Hausväterliteratur, the "literature of the fathers of the houses," was once a popular genre but today is seldom studied. Roughly, this literature, as its name suggests, comprises books on the proper keeping of noble households and mansions. Interestingly, besides the content which one might expect in such books, the organization of personnel, the arrangement of festivities, discussions of the various branches of technical skills, economic advice and the whole field of agriculture, fishing and hunting, these books also contain remarkably large amounts of information directly connected with magic and an associated popular medicine (Volksmedizin). This medicine involved treatment administered mostly by laywomen instead of regular physicians and was based not just upon traditional medical knowledge per se but also upon magical practices. Also found in such texts are alchemical ideas and recipes. This means that despite the fact that such books were written and published in the 17th and early 18th century, the Age of Enlightenment, conceptions found in them are still deeply rooted in older intellectual currents, in Medieval and Renaissance thinking. The present study examines examples of alchemical, magical and popular medical ideas in three such works and seeks to explain how pre-enlightenment ideas and thought could maintain such an influential place in the intellectual world of a later time dominated by other philosophies. PMID:22352133

  1. Vibration-rotation alchemy in acetylene (12C2H2), ? at low vibrational excitation: from high resolution spectroscopy to fast intramolecular dynamics

    Science.gov (United States)

    Perry, David S.; Miller, Anthony; Amyay, Badr; Fayt, André; Herman, Michel

    2010-04-01

    The link between energy-resolved spectra and time-resolved dynamics is explored quantitatively for acetylene (12C2H2), ? with up to 8600 cm-1 of vibrational energy. This comparison is based on the extensive and reliable knowledge of the vibration-rotation energy levels and on the model Hamiltonian used to fit them to high precision [B. Amyay, S. Robert, M. Herman, A. Fayt, B. Raghavendra, A. Moudens, J. Thiévin, B. Rowe, and R. Georges, J. Chem. Phys. 131, 114301 (2009)]. Simulated intensity borrowing features in high resolution absorption spectra and predicted survival probabilities in intramolecular vibrational redistribution (IVR) are first investigated for the v 4 + v 5 and v 3 bright states, for J = 2, 30 and 100. The dependence of the results on the rotational quantum number and on the choice of vibrational bright state reflects the interplay of three kinds of off-diagonal resonances: anharmonic, rotational l-type, and Coriolis. The dynamical quantities used to characterize the calculated time-dependent dynamics are the dilution factor φ d, the IVR lifetime τ IVR , and the recurrence time τ rec. For the two bright states v 3 + 2v 4 and 7v 4, the collisionless dynamics for thermally averaged rotational distributions at T = 27, 270 and 500 K were calculated from the available spectroscopic data. For the 7v 4 bright state, an apparent irreversible decay of is found. In all cases, the model Hamiltonian allows a detailed calculation of the energy flow among all of the coupled zeroth-order vibration-rotation states.

  2. : Theatricality in early modern alchemical practice

    OpenAIRE

    Vermeir, Koen

    2010-01-01

    This paper treats of early modern alchemy and theatricality. I focus on the theatrical characteristics of some kinds of alchemy, in relation with natural magic and other practices, by exploring a case study: I investigate the story of the baron and baroness of Beausoleil, who were famous for their mining, divining and alchemical practices in the first half of the seventeenth century. First, I show that their contemporary Francis Bacon considered alchemy an 'imaginative science', and that this...

  3. Modern alchemy : plasma-arc conversion of garbage into energy, water and aggregate is the stuff of science fiction, and it may be coming soon to the Red Deer dump

    Energy Technology Data Exchange (ETDEWEB)

    Stastny, P.

    2009-10-15

    Plasco Energy Group will now need to win government support for the construction of a new waste facility in Red Deer, Alberta. The Ottawa-based company uses a plasma waste conversion technology to generate electricity by refining hydrogen and carbon monoxide produced during the gasification process into a synthetic gas. An 85 ton per day demonstration plant has been operating in Ottawa since 2007. The average ton of municipal waste contains 13,000 mega joules of energy. The Plasco process will also help to treat waste water for release into the environment. The garbage is reduced to 1 per cent of its original volume after the water and gases are stripped away. The remaining garbage is melted with plasma arc torches for use as clean aggregates. The process also yields one and a half kg per ton of heavy metals. It was concluded that many cities are now showing an interest in the waste treatment technology. 1 fig.

  4. From green to gold - alchemy in the 21st century? : the effect of voluntary environmental initiatives, certifications, and awwards on short-term stock returns in Norway and Sweden

    OpenAIRE

    Hagen, Ingvild; Fliflet, Eivind Rasmussen

    2012-01-01

    This thesis aims at identifying the relationship between a company’s environmental and economic performance. Using an event study methodology, we study 125 environmental press releases on voluntary initiatives, awards and certifications from 43 companies listed in Norway and Sweden. Through both a univariate and a cross-sectional analysis, we find that although there is no overall relationship between environmental and economic performance, there are in fact differences related to the strengt...

  5. Post tenebras spero lucem : Alquimia y ritos en el Quijote y otras obras cervantinas

    OpenAIRE

    Magrinyà Badiella, Carles

    2014-01-01

    This study focuses on two areas: alchemy (Part I) and rituals of initiation (Part II) in the works of Miguel de Cervantes, focusing on Don Quijote de la Mancha as my main case study. The first part analyses the function of alchemy and how it can be interpreted throughout the works and various literary genres of Cervantes. It will demonstrate that the texts of Cervantes contain both explicit and implicit allusions to, as well as different aspects of alchemy, such as operative and spiritual alc...

  6. Democritus as Taoist

    CERN Document Server

    Rivero, A

    2003-01-01

    While similarities do naturally exist between tao and other philosophical systems, for the specific case of Democritus we can argue also the chronological parallels, the parallels in the posterior development (alchemy and mathematics) and the textual parallelism.

  7. Johann Joachim Becher and the beginnings of Baroque glaßmaking in Central Europe

    Czech Academy of Sciences Publication Activity Database

    Mádl, Martin

    Corning, N. Y : The Corning Museum of Glass, 2008, s. 96-105 ISBN 978-0-87290-169-8 Institutional research plan: CEZ:AV0Z80330511 Keywords : baroque * glass * alchemy Subject RIV: AL - Art, Architecture, Cultural Heritage

  8. Z pokladů... Knihovny Ústavu pro českou literaturu AV ČR : zedník alchymistou?

    Czech Academy of Sciences Publication Activity Database

    Malínek, Vojtěch

    2015-01-01

    Roč. 67, č. 10 (2015), s. 3. ISSN 0011-2321 Institutional support: RVO:68378068 Keywords : academic libraries * Institute of Czech Literature, CAS * history of alchemy Subject RIV: AJ - Letters, Mass-media, Audiovision

  9. An Improved Algorithm for Generating Database Transactions from Relational Algebra Specifications

    Directory of Open Access Journals (Sweden)

    Daniel J. Dougherty

    2010-03-01

    Full Text Available Alloy is a lightweight modeling formalism based on relational algebra. In prior work with Fisler, Giannakopoulos, Krishnamurthi, and Yoo, we have presented a tool, Alchemy, that compiles Alloy specifications into implementations that execute against persistent databases. The foundation of Alchemy is an algorithm for rewriting relational algebra formulas into code for database transactions. In this paper we report on recent progress in improving the robustness and efficiency of this transformation.

  10. An Improved Algorithm for Generating Database Transactions from Relational Algebra Specifications

    OpenAIRE

    Dougherty, Daniel J.

    2010-01-01

    Alloy is a lightweight modeling formalism based on relational algebra. In prior work with Fisler, Giannakopoulos, Krishnamurthi, and Yoo, we have presented a tool, Alchemy, that compiles Alloy specifications into implementations that execute against persistent databases. The foundation of Alchemy is an algorithm for rewriting relational algebra formulas into code for database transactions. In this paper we report on recent progress in improving the robustness and efficiency of this transforma...

  11. An Improved Algorithm for Generating Database Transactions from Relational Algebra Specifications

    CERN Document Server

    Dougherty, Daniel J

    2010-01-01

    Alloy is a lightweight modeling formalism based on relational algebra. In prior work with Fisler, Giannakopoulos, Krishnamurthi, and Yoo, we have presented a tool, Alchemy, that compiles Alloy specifications into implementations that execute against persistent databases. The foundation of Alchemy is an algorithm for rewriting relational algebra formulas into code for database transactions. In this paper we report on recent progress in improving the robustness and efficiency of this transformation.

  12. Alchemical crossings in Psychology

    OpenAIRE

    Helton Marculino de Souza

    2014-01-01

    The objective of this article is to discuss the contributions of Alchemy to the field of Psychology, especially for Analytical Psychology as a proposal of an Alchemical Psychology, whose representatives highlighted here are Carl Gustav Jung and James Hillman. It is understood that the knowledge of Alchemy have been applied in various areas such as metallurgy, chemistry, philosophy, and it has a possible application in the field of Psychology. In this sense, it is observed that if to Jung the ...

  13. Alchemical crossings in Psychology

    Directory of Open Access Journals (Sweden)

    Helton Marculino de Souza

    2014-12-01

    Full Text Available The objective of this article is to discuss the contributions of Alchemy to the field of Psychology, especially for Analytical Psychology as a proposal of an Alchemical Psychology, whose representatives highlighted here are Carl Gustav Jung and James Hillman. It is understood that the knowledge of Alchemy have been applied in various areas such as metallurgy, chemistry, philosophy, and it has a possible application in the field of Psychology. In this sense, it is observed that if to Jung the concepts of Alchemy interlace connections with the knowledge proposed by Analytical Psychology, on the other hand Hillman adopts this knowledge to develop a strategy for use in the field of psychotherapy, proposing to think alchemically. Thus, for this second author in the exercise of Psychology, the meetings with the patient go beyond the application of theories, constituting as a “do-soul” in the office. This is, more than translating symbols, it is proposed to “stay with the image”, with an attention from both the patient and the psychologist for that the words expressed in this dialogue does not become “wordthings” or be reduced to a unique meaning that tends to discard the image. It is hoped, through this work, to promote knowledge of the professionals about the Analytical Psychology and Alchemy Psychology in their connections with Alchemy and its reverberations in the field of psychotherapy in these approaches.

  14. A autoridade, o desejo e a alquimia da política: linguagem e poder na constituição do papado medieval (1060-1120 Authority, desire and the alchemy of politics: language and power in the constitution of the Medieval Papacy (1060-1120

    Directory of Open Access Journals (Sweden)

    Leandro Duarte Rust

    2011-06-01

    Full Text Available O tema deste artigo é a compreensão política propagada entre as décadas de 1060 e 1120 por eminentes eclesiásticos engajados na legitimação e no exercício do poder papal. O exame de epístolas, crônicas e de outros registros escritos do período revela que os assim chamados "papistas" freqüentemente operavam uma transfiguração da política ao envolvê-la em ancestrais tramas de sentido colhidas junto à tradição letrada eclesiástica. Aspecto exemplificado pela idéia de "desejo", que desponta na documentação quando o historiador volta suas atenções para a investigação dos fundamentos do poder político na civilização medieval. Ela permeia as experiências de autoridade e legitimidade, os posicionamentos acerca do recurso à violência; a crença na hierarquização de poderes. Este breve estudo se detém, portanto, nas imbricadas relações existentes entre a prática do poder, o pensamento político e a linguagem.The theme of this paper is the political vision propagated between the decades of 1060 and 1120 by prominent churchmen engaged in the legitimacy and the exercise of the pontifical power. An examination of epistolae, chronicae and other written records of the period reveal that the so-called "papists" frequently performed a transfiguration of politics by involved it in the ancient webs of meaning conveyed from the ecclesiastical literate tradition. Aspect exemplified by the idea of "desire", which occurs in the historical sources very frequently when the historian turns his attention to investigate the basis of political power in the medieval civilization. It permeates the ideas of authority and legitimacy, the positions about the use of violence and the beliefs in the hierarchy of the powers. Therefore, this brief study aims at the intertwined relationship between the practice of power, political thought and language.

  15. Jung's quest for the "Aurora consurgens"

    DEFF Research Database (Denmark)

    Haaning, Aksel

    2014-01-01

    Auriferae (1593); and it raises the question of whether this could be the possible missing link to Jung's subsequent research in Alchemy and Hermetic Philosophy in the years to come. It is argued that here was the beginning of Jung's quest for the Aurora consurgens, the publication of which concludes the......The paper focuses on the year 1929 when Jung published ‘A European commentary’ to Richard Wilhelm's German translation of the Taoist text The Secret of the Golden Flower. This shows that Jung had already started on the track of European alchemy by following up Conrad Waldkirch's preface in Artis...

  16. CHRONOLOGICAL INVENTORY OF CHEMISTRY TEACHING

    Directory of Open Access Journals (Sweden)

    LAXMAN S. BHATTAR

    2013-05-01

    Full Text Available The Chronological Research of Chemistry teaching in the science education isinvented by the following pioneer philosophers and they developed the skills abilitieswhich is remarked by the Greek philosophers are socrates and plato (in 116 to 127 BCgiven an idea an naturalistic and conceptual thoughts and highlights on water. Chinaphilosophers (365 to 427 BC Taoism made pioneer of Alchemy used in medicines andtranslation preparation of Au (Gold. Epicurea (341 to 371 to 400 BC developed kineticand atomic theory. Nestorians-Arabian (800 to 900BC explains the translated literatureon Alchmey in to Arabic language. Jabiri Bn Hayyan (900to 969 to 1000 yearspublished book on Alchemy.

  17. Jakub Horčický (Sinapius) und seine Nobilitation

    Czech Academy of Sciences Publication Activity Database

    Smolka, J.; Purš, Ivo

    -, č. 14 (2014), s. 101-113. ISSN 1213-5372 R&D Projects: GA ČR GAP405/12/1268 Institutional support: RVO:68378033 Keywords : alchemy * heraldry * symbols * Rudolf II * Voynich manuscript Subject RIV: AL - Art, Architecture, Cultural Heritage

  18. Das alchemistische Traktat des Marcus Eugenius Bonacina von 1616 über Trinkgold

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    -, č. 8 (2008), s. 77-90. ISSN 1213-5372 R&D Projects: GA AV ČR IAA800330702 Institutional research plan: CEZ:AV0Z80330511 Keywords : alchemy * iconography * history Subject RIV: AL - Art, Architecture, Cultural Heritage

  19. Ternary atom site location in L12-structured intermetallic compounds

    International Nuclear Information System (INIS)

    Ternary sublattice site occupancy in two L12-structured intermetallic compounds were evaluated by a transmission electron microscope technique called ALCHEMI, or atom site location by channeling enhanced microanalysis, and by x-ray diffractometry, through measuring the relative integrated intensity of fundamental and superlattice x-ray diffraction peaks. The x-ray diffractometry showed that in nickel-rich Ni3Al+Hf hafnium was found to occupy preferentially the aluminum sublattice, and in a multiphase alloy an L12-structured phase with the composition Al74.2Ti19Ni6.8 nickel atoms showed a strong preference for the titanium sublattice. The ALCHEMI data broadly agreed with the x-ray results for Ni3Al but gave completely the opposite result, i.e., a preference of nickel for the titanium sublattice, for Al3Ti. The methods of ALCHEMI and x-ray diffractometry are compared, and it is concluded that ALCHEMI data may be easily convoluted by peak overlap and delocalization effects

  20. A Pandora's Box in Singapore

    Science.gov (United States)

    Overland, Martha Ann

    2007-01-01

    Singapore is no longer content to produce only engineers and technocrats, says Tharman Shanmugaratnam, minister for education. The government wants to foster a dynamic environment that can attract thinkers and leaders in many fields, not just science. Singapore's planners envision their city as the "Boston of the East"--where the alchemy between…

  1. Cooking and Science. Ideas in Science. Notes for Teachers.

    Science.gov (United States)

    Murphy, Pat, Ed.

    Presented are seven articles (reprinted from "The Exploratorium" magazine) which focus on the scientific explanations for the specific (and oftentimes peculiar) instructions and procedures called for in many recipes. "Baking, Boiling, and Other Hot Topics" (Joel Myerson) discusses different methods of cooking. "The Culinary Alchemy of Eggs"…

  2. The Alchemist of Today

    Science.gov (United States)

    Serret, Natasha

    2010-01-01

    Traditionally, alchemy has involved the power of transmuting base metals such as lead into gold or producing the "elixir of life" for those wealthy people who wanted to live forever. But what of today's developments? One hundred years ago, even breaking the four-minute mile would have been deemed "magic," which is what the alchemists of the past…

  3. The Soul’s Wisdom: Stories of Living and Dying

    OpenAIRE

    Vachon, M. L. S.

    2008-01-01

    Cancer can lead to spiritual transformation, which can be seen as a form of alchemy. During this process, patients, family members, and even professional caregivers can find themselves having spiritual experiences that go beyond any they had previously encountered. This paper provides qualitative descriptions of the “Field” or “Soul Wisdom” experienced by patients and caregivers.

  4. 1964 computer run on a laser-imploded capsule

    International Nuclear Information System (INIS)

    WAZER Alchemy 7b (WA-7b) is a WAZER calculation of a laser-driven micro-implosion of a spherical capsule consisting of a thin gold pusher surrounded by a thick (frozen) deuterium ablator. The properties of the target capsule and the shape of the laser pulse used to irradiate it are described

  5. What has been going on? [Open Access - what has been going on?

    OpenAIRE

    Swan, Alma

    2005-01-01

    New gold journals, alchemy at work on existing journals, hybrids and chimaeras; new repositories, growing repositories, empty repositories; Anglo-Saxon governments in a tizz; funder fudges, funders holding firm; employer moves; gold publishers, green publishers, grey publishers, green publishers going grey; authors - yes, no, don't know; Dutch cream, Scotland the Brave, the QUT-ting edge; Google; Jan Velterop.

  6. After liber novus.

    Science.gov (United States)

    Shamdasani, Sonu

    2012-06-01

    This paper reflects on the conference question concerning the clinical and theoretical significance of Jung's Liber Novus, two years after its initial publication, and looks at how Jung himself reflected upon it and how it informed his turn to alchemy, with particular attention to the theme of opposites and their reconciliation in Liber Novus, later taken up in Mysterium Coniunctionis. PMID:22724599

  7. Transmutation of Matter in Byzantium: The Case of Michael Psellos, the Alchemist

    Science.gov (United States)

    Katsiampoura, Gianna

    2008-01-01

    There is thus nothing paradoxical about the inclusion of alchemy in the ensemble of the physical sciences nor in the preoccupation with it on the part of learned men engaged in scientific study. In the context of the Medieval model, where discourse on the physical world was ambiguous, often unclear, and lacking the support of experimental…

  8. Oswald Croll und die Symbolik des Titelblattes seines Werkes Basilica chymica

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    -, č. 15 (2015), s. 64-87. ISSN 1213-5372 R&D Projects: GA ČR GAP405/12/1268 Institutional support: RVO:68378033 Keywords : paracelsian alchemy * art history * iconography * Oswald Croll Subject RIV: AL - Art, Architecture, Cultural Heritage

  9. Habsburkové na českém trůnu a jejich zájem o alchymii a okultní nauky

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    Praha: Artefactum, 2011 - (Purš, I.; Karpenko, V.), s. 93-128 ISBN 978-80-86890-33-3 R&D Projects: GA AV ČR IAA800330901 Institutional research plan: CEZ:AV0Z80330511 Keywords : history of science * history of alchemy * art history Subject RIV: AL - Art, Architecture, Cultural Heritage

  10. Chemistry in "The Ascent of Man."

    Science.gov (United States)

    Hostettler, John D.; Brooks, Kenneth

    1980-01-01

    Describes "The Ascent of Man," a course emphasizing science and human values. Detailed are some chemical topics covered in the course, and how these topics are used in other traditional chemistry courses. Topics discussed include alchemy, the chemical revolution, steam engines, the Manhattan project, and several bioethical problems. (CS)

  11. Alchymická, hornická a metalurgická literatura

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    Praha: Artefactum, 2015 - (Purš, I.; Kuchařová, H.), s. 379-404 ISBN 978-80-86890-72-2 R&D Projects: GA AV ČR 1QS800330501 Institutional support: RVO:68378033 Keywords : Ferdinand II of Tyrol * history of libraries * Ambras castle * alchemy Subject RIV: AL - Art, Architecture, Cultural Heritage

  12. Zápalná zrcadla císaře Rudolfa II. a jeho alchymická laborace

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    Praha: Artefactum, 2013 - (Konečný, L.; Slavíček, L.), s. 86-99 ISBN 978-80-86890-62-3 R&D Projects: GA ČR GAP405/12/1268 Institutional support: RVO:68378033 Keywords : alchemy * Rudolf II * history of science * art history Subject RIV: AL - Art, Architecture, Cultural Heritage

  13. The econometrics of the Holy Grail: A critique (Revised version)

    OpenAIRE

    Keuzenkamp, H.A.

    1995-01-01

    This paper discusses the methodological views of David Hendry. A critique is given on the reification of the so-called Data Generating Process. The merits of general to specific modelling are analyzed. Hendry's neo-Popperian philosophy is examined. It is argued that this philosophy is not able to transform econometrics from `alchemy' to `science'.

  14. Medicine and the Renaissance world of learning.

    Science.gov (United States)

    Siraisi, Nancy G

    2004-01-01

    This article considers aspects of the relation of medicine with other learned disciplines during the sixteenth century and presents some examples of the contribution of medical authors of that period to such diverse fields as natural philosophy, physiognomy, alchemy, travel writing, the art of memory, and the study of antiquities. PMID:15161085

  15. The Paranormal: A Selected Bibliography of Serials and Reference Works, with Commentary.

    Science.gov (United States)

    Smith, Charles H.

    1997-01-01

    Provides bibliography of references and serials to assist acquisitions librarians in selection of the paranormal. Topics include alchemy, astrology, magic, conjuring, witchcraft, paganism, demonology, satanism, voodooism, sorcery, cults, shamanism, UFOs, exobiology, curious physical and biological phenomena, ghosts, poltergeists, haunted places,…

  16. Bloody Mud, Rifle Butts, and Barbed Wire: Transforming the Bataan Death March in Silko's "Ceremony"

    Science.gov (United States)

    Beidler, Peter G.

    2004-01-01

    Efforts made by Leslie Marmon Silko's who took factual raw materials and, through the alchemy of her creative artistry, transformed her novel, "Ceremony" into something new and different is presented. Silko has made certain changes in the Bataan Death March in "Ceremony", and portrayed the Japanese with considerable sympathy.

  17. The Aspiring Adept: Robert Boyle and His Alchemical Quest (Lawrence M. Principe)

    Science.gov (United States)

    Kovac, Jeffrey

    1999-10-01

    Robert Boyle is widely regarded as the Father of Modern Chemistry, who broke once and for all from the irrational, misguided alchemy that preceded him. One of the goals of this carefully researched and argued new book by Lawrence M. Principe, Assistant Professor in the Department of Chemistry and the Institute for the History of Science, Medicine, and Technology at The Johns Hopkins University, is to refute the two errors in this characterization of Boyle and to understand his life, thought, and work in the intellectual and social context of his time. This book is not for the casual reader; it is a detailed scholarly treatise in the history of science, but it provides a fresh and interesting perspective on Boyle and on the development of chemistry in the 17th century. Boyle is usually characterized as a modern scientist and his most famous book, The Skeptical Chymist, as a critique of traditional alchemy. Principe demonstrates that this characterization is based on a selective and sometimes incorrect reading of Boyle's works. Like Newton, Boyle was deeply involved in traditional transmutational alchemy, reading the works of other alchemists, performing experiments, and even witnessing transmutations. Alchemy, however, was not a monolith and Boyle adhered to what Principe tentatively identifies as a uniquely English school of supernatural alchemy. According to Principe, The Skeptical Chymist was mainly a criticism of the Paracelsians interested in chemical medicine rather than a defense of what we would now regard as modern chemistry. To further support his characterization of Boyle and to better reveal Boyle's involvement in alchemyparticularly the transmutation of base metals to gold, termed chrysopoeiaPrincipe has reconstructed from some 20 fragments one of Boyle's alchemical manuscripts, his Dialogue on the Transmutation of Metals. The full text of this lost work is included as Appendix 1. Two other primary sources, Interview Accounts of Transmutations and

  18. Electron channeling X-ray microanalysis for site occupation in β-FeSi2 doped with Co

    International Nuclear Information System (INIS)

    The site occupation state of Co atoms in a thermoelectric semiconductor Fe0.97Co0.03Si2 of the β-FeSi2 structure was analyzed by measuring and calculating characteristic X-ray intensities at various electron incidence directions in a transmission electron microscope (TEM). The analysis technique used was recently developed from the method for determining atomic locations by channeling-enhanced microanalysis (ALCHEMI). The calculation was based on dynamical electron diffraction and inelastic scattering theories, and the calculated intensities were compared with the measured intensities. The intensities depended on the occupation site of Co atoms and sample thickness. As a result, the occupation probabilities of Co atoms on Fe I and II sites, which were difficult to be determined by the conventional ALCHEMI technique, were shown to be 0.0333 and 0.0257, respectively

  19. Ammonia in the environment: From ancient times to the present

    Energy Technology Data Exchange (ETDEWEB)

    Sutton, M.A.; Erisman, J.W.; Dentener, F.; Moller, D. [Centre for Ecology and Hydrology, Penicuik (United Kingdom). Edinburgh Research Station

    2008-12-15

    Recent research on atmospheric ammonia has made good progress in quantifying sources/sinks and environmental impacts. This paper reviews the achievements and places them in their historical context. It considers the role of ammonia in the development of agricultural science and air chemistry, showing how these arose out of foundations in 18th century chemistry and medieval alchemy, and then identifies the original environmental sources from which the ancients obtained ammonia. Ammonia is revealed as a compound of key human interest through the centuries, with a central role played by sal ammoniac in alchemy and the emergence of modern science. The review highlights how recent environmental research has emphasized volatilization sources of ammonia. Conversely, the historical records emphasize the role of high-temperature sources, including dung burning, coal burning, naturally burning coal seams and volcanoes. Present estimates of ammonia emissions from these sources are based on few measurements, which should be a future priority.

  20. Jung's quest for the Aurora consurgens.

    Science.gov (United States)

    Haaning, Aksel

    2014-02-01

    The paper focuses on the year 1929 when Jung published 'A European commentary' to Richard Wilhelm's German translation of the Taoist text The Secret of the Golden Flower. This shows that Jung had already started on the track of European alchemy by following up Conrad Waldkirch's preface in Artis Auriferae (1593); and it raises the question of whether this could be the possible missing link to Jung's subsequent research in Alchemy and Hermetic Philosophy in the years to come. It is argued that here was the beginning of Jung's quest for the Aurora consurgens, the publication of which concludes the Mysterium Conuinctionis more than twenty years later. It is further maintained that this choice of the Aurora is a profound expression of Jung's ambition to revitalize the past from within the individual, and helps explain Jung's deep concern with the welfare and future of modern society. PMID:24467350

  1. Site occupancies in ternary C15 ordered Laves phases

    International Nuclear Information System (INIS)

    Site occupancies in three C15-structured AB2(X) Laves phases have been determined by Atom Location by CHanneling Enhanced MIcroanalysis (ALCHEMI). In NbCr2(V), the results were consistent with exclusive site occupancies of Nb for the A sublattice and Cr and V for the B sublattice. The B-site occupancy of V is not expected from atom size effects alone. In NbCr2(Ti), the results were consistent with Ti partitioning mostly to the A sites with some anti-site defects likely. In HfV2(Nb), the results were consistent with Nb partitioning between the A and B sites. The results of the ALCHEMI analyses of these ternary C15 Laves phase materials will be discussed with respect to previously determined phase diagrams and first-principles total energy and electronic structure calculations

  2. La influencia de la Alquimia medieval hispana en la Europa moderna,

    Directory of Open Access Journals (Sweden)

    López Pérez, Miguel

    2002-12-01

    Full Text Available The pseudolullian texts of german paracelsists in Spain specify the peninsular paracelsism. This texts, and many others, were influenced by other previous texts, like these of the same Lull, Arnau of Vilanova and John of Rupescissa, that's the reason why this ideas made a return trip and the spanish mediaeval alchemy determined directly to the european alchemy.

    Los textos pseudolulianos de paracelsistas alemanes en España concretan los años del paracelsismo peninsular. Dichos textos, y algunos más, estaban influenciados por otros anteriores, como los del propio Lulio, Arnau de Vilanova y Juan de Rupescissa, por lo que dichas ideas hicieron un viaje de ida y vuelta y la Alquimia hispana medieval influenció directamente a la europea.

  3. Alanos, vándalos y suevos en la exégesis apocalíptica de Isaac Newton: una fuente y un texto desconocidos

    OpenAIRE

    Toribio Pérez, Pablo

    2010-01-01

    Among Newton's so called non-scientific projects (alchemy and theology), written to a considerable extent in Latin, the interpretation of Revelation stands in a central position. Isaac Newton (1642/3-1727) devoted great efforts to translate Apocalyptical chronology into historical chronology. In this kind of interpretation the wars of the last years of the Roman Empire play an outstanding role, and among them the invasion of Hispania by Alans, Vandals and Suevians. In this paper the author pr...

  4. E.J.Holmyard and the historical approach to science teaching

    OpenAIRE

    Jenkins, EW

    2014-01-01

    E. J. Holmyard was a distinguished scholar and schoolmaster in England in the first half of the twentieth century. After graduating from Cambridge in both natural science and history, he quickly established a reputation for his research into the early history of chemistry, especially Islamic alchemy, and for his advocacy of a historical approach to the teaching of science. Both these interests found expression in his large number of school chemistry textbooks, many of which were highly succes...

  5. Complexity: policymakers' divider and possible conqueror

    OpenAIRE

    Wyatt, R G

    1980-01-01

    It is argued that acknowledgement of complexity is followed by feelings of helplessness which generate three distinct policymaking styles. These three, labelled analytical abdication, analytical alchemy, and analytical addiction, are outlined in terms of their logical bases, strengths, and weaknesses. A natural tendency for the emphasis of fashion to oscillate between all three, in order to speed progress towards greater understanding, is demonstrated, and its inhibition by policymakers' gene...

  6. Light seekers

    OpenAIRE

    Mestres Sierra, Cecilia

    2014-01-01

    Light Seekers represents a light and colour allegory, becoming a tribute to the French Impressionism. This audiovisual piece is a travel through the artist’s creative process from a magic point of view: the alchemy. A conceptual tour starting from the usual mundane things until the achievement of the mind’s spiritual ascension. A collection of emotions and sensations interlaced through music and landscapes, rhythm and colour

  7. Atom location using scanning transmission electron microscopy based on electron energy loss spectroscopy

    International Nuclear Information System (INIS)

    Full text: The technique of atom location by channelling enhanced microanalysis (ALCHEMI) using cross section data, measured as a function of electron beam orientation, has been widely implemented by many researchers. The accurate application of ALCHEMI, usually based on energy dispersive x-ray analysis (EDX), requires knowledge, from first principles, of the relative delocalization of the inner-shell ionization interaction (see for example Oxley and Allen, 1998; Oxley et al., 1999). Scanning transmission electron microscopy (STEM) based on electron energy loss spectroscopy (EELS) also provides information about the location of atoms of different types within the crystal lattice. Unlike high angle annular dark field (HAADF), EELS provides a unique signal for each atom type. In conjunction with highly focused probes, allowing near atomic resolution, this makes possible, in principle, the application of ALCHEMI like techniques to STEM images to determine the distribution of impurities within the unit cell. The accurate interpretation of STEM results requires that both the inner-shell ionization interaction and resulting ionization cross section or image be correctly modelled. We present model calculations demonstrating the in principle application of ALCHEMI type techniques to STEM images pertinent to EELS. The inner-shell ionisation interaction is modelled using Hartree-Fock wave functions to describe the atomic bound states and Hartree-Slater wave functions to describe the continuum states. The wave function within the crystal is calculated using boundary conditions appropriate for a highly focussed probe (Rossouw and Allen, 2001) and STEM images or ionisation cross sections are simulated using an inelastic cross section formulation that correctly accounts for the contribution from both dynamical electrons and those dechannelled by absorptive scattering processes such as thermal diffuse scattering (TDS). Copyright (2002) Australian Society for Electron Microscopy

  8. CHRONOLOGICAL INVENTORY OF CHEMISTRY TEACHING

    OpenAIRE

    Laxman S. Bhattar; SWAMINATH L.BHATTAR

    2013-01-01

    The Chronological Research of Chemistry teaching in the science education isinvented by the following pioneer philosophers and they developed the skills abilitieswhich is remarked by the Greek philosophers are socrates and plato (in 116 to 127 BC)given an idea an naturalistic and conceptual thoughts and highlights on water. Chinaphilosophers (365 to 427 BC) Taoism made pioneer of Alchemy used in medicines andtranslation preparation of Au (Gold). Epicurea (341 to 371 to 400 BC) developed kinet...

  9. Teach us atom structure

    International Nuclear Information System (INIS)

    This book is written to teach atom structure in very easy way. It is divided into nine chapters, which indicates what is the components of matter? when we divide matter continuously, it becomes atom, what did atom look like? particles comprised of matter is not only atom, discover of particles comprised of atom, symbol of element, various radiation, form alchemy to nuclear transmutation, shape of atom is evolving. It also has various pictures in each chapters to explain easily.

  10. Cosmochemistry

    Science.gov (United States)

    Esteban, C.; García López, R. J.; Herrero, A.; Sánchez, F.

    2011-01-01

    1. Primordial alchemy: from the Big Bang to the present Universe G. Steigman; 2. Stellar nucleosynthesis N. Langer; 3. Obervational aspects of stellar nucleosynthesis D. L. Lambert; 4. Abundance determinations in HII regions and planetary nebulae G. Stasinska; 5. Element abundances in nearby galaxies D. R. Garnett; 6. Chemical evolution of galaxies and intracluster medium F.Matteucci; 7. Element abundances through the cosmic ages M. Pettini.

  11. Teach us atom structure

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Suh Yeon

    2006-08-15

    This book is written to teach atom structure in very easy way. It is divided into nine chapters, which indicates what is the components of matter? when we divide matter continuously, it becomes atom, what did atom look like? particles comprised of matter is not only atom, discover of particles comprised of atom, symbol of element, various radiation, form alchemy to nuclear transmutation, shape of atom is evolving. It also has various pictures in each chapters to explain easily.

  12. Bibliography

    OpenAIRE

    2013-01-01

    ALLEN, B.L., 2003, Uneasy Alchemy: Citizens and Experts in Louisiana's Chemical Corridor Disputes, Cambridge, MA, MU Press. ANGLIN, M., 1997, Working from the inside out: implications of breast cancer activism for biomedical policies and practices, Social Science & Medicine 44(9), 1403-1415. ANHEIER, H., 2000, Managing non-profit organizations: Towards a new approach, Civil Society Working (http://www.lse.ac.uk/collections/CCS/pdf/cswp1.pdf). ANHEIER, H., THEMUDO, N., 2002, Transnational Form...

  13. Open Access what's been going on

    CERN Document Server

    CERN. Geneva

    2005-01-01

    New gold journals, alchemy at work on existing journals, hybrids and chimaeras; new repositories, growing repositories, empty repositories; Anglo-Saxon governments in a tizz; funder fudges, funders holding firm; employer moves; gold publishers, green publishers, grey publishers, green publishers going grey; authors - yes, no, don't know; Dutch cream, Scotland the Brave, the QUT-ting edge; Google; Jan Velterop. And more. All in 30 minutes.

  14. To search new technology of dream

    International Nuclear Information System (INIS)

    This book deals with new technology of dream like cold nuclear fusion is possible, alchemy of the 21 century, cold transmutation of element, cold nuclear fusion on the desk, fire of multiarc recalling earth environment, like miracle fire and multiarc device, field fulfilling of dream, pioneers of anti gravity research, dream of anti gravity which is realized by mobius, N-machine and space energy, challenge for infinite power unit like engine of dream, Kawai magnet motor and attaching magnet on the motorcycle.

  15. 「内丹」の技法と思想 : 『悟真篇』の例

    OpenAIRE

    鈴木, 健郎

    1997-01-01

    The key concepts of Chinese cosmology - the Dao (道, the "Way") and Qi (気, "energy" or "material force") - were introduced by philosophical Taoists. Philosophical Taoism was succeeded by religious Taoism, whose teachings and practices, especially those of Neidan (内丹, "inner alchemy"), are closely tied to a traditional Chinese cosmogony based on the concepts of Qi and Dao. Research into Neidan thus sheds light not only on Chinese cosmology, but also on the wider issue of the relationship betwee...

  16. De los dioses a los hombres: Un recorrido histórico del descubrimiento de los elementos químicos

    OpenAIRE

    Pellón González, I.

    2014-01-01

    To achieve the apparently simple Periodic Table of the Elements has implied tremendous efforts over thousands of years. In this paper we present a brief history of the discovery of the chemical elements from prehistory to the present day, revealing the controversies that arose on the way and claiming the important work performed by alchemists in the advancement of knowledge. This is especially important if we consider that alchemy had a period of existence of many thousands of years, while th...

  17. The role of the Czech chemists in reception and dissemination of the periodic system in Europe

    Czech Academy of Sciences Publication Activity Database

    Štrbáňová, Soňa

    Budapest : MKE, 2009. s. 40. ISBN 978-963-9319-96-7. [International conference on the history of chemistry. Consumers and experts. The uses of chemistry ( and alchemy) /7./. 02.08.2009-05.08.2009, Sopron] Institutional research plan: CEZ:AV0Z80630520 Keywords : D.I. Mendeleev * B. Brauner * periodic system of elements * history of chemistry * history of Czech chemistry Subject RIV: AB - History

  18. Why Isaac Newton Rejected Astrology: A Preliminary Reconstruction or "Newton's Comets and the Transformation of Astrology": 20 Years Later

    OpenAIRE

    Rutkin, H. Darrel

    2006-01-01

    [EN] What was Isaac Newton's relationship to astrology? Unlike with bis study and practice of alchemy, there is very little evidence on which to base a well-established answer. In this preliminary investigation, I argue that Newton rejected astrology for both personal and ideological reasons. This anti-astrological valence is primarily revealed in manuscript writings related to bis mid-1680s theological tract, "The Philosophical Origins of Gentile Theology." In addition to arguing for this an...

  19. Chemistry Progress and Civilization in Ancient China

    Institute of Scientific and Technical Information of China (English)

    JIANG Yu-Qian; RUAN Shu-Xiang; TANG Shan; SHUAI Zhi-Gang

    2011-01-01

    @@ During the 6,000 years of Chinese civilization, chemistry has played an essential role.The bronzed chime bells of the Warring States Period (475-221 BC) unearthed in Hubei Province shows not only the excellence in musical instruments in ancient China, but also the technological advances in metallurgy.Chinese alchemy was not originated from the quest to turn common metals to gold, instead, it was for searching medicines for longevity of human beings, mostly practised by Taoists.

  20. “It’s Not [Just] Cricket: The Art and Politics of the Popular – Cultural Imperialism, ‘Sly Civility’ & Postcolonial Incorporation”

    OpenAIRE

    Andrew Jones

    2013-01-01

    Ashutosh Gowariker’s critically acclaimed Lagaan (2001), is a marvellous piece of cinematic troubling, which, via an astute use of allegory, reflects upon identity politics and power relations in both colonial and postcolonial contexts. Bringing two cornerstones of Indian popular culture together, namely cricket and Hindi formulae films, Gow ariker produces an engagingly, affective alchemy of image and sound, which intervenes critically in the discourses of Br...

  1. Perspective, vision and dream: notes on the plate "Oratory-Laboratory" in Heinrich Khunrath´s Amphitheatrum sapientiae aeternae

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    Olomouc : Univerzita Palackého v Olomouci, 2015 - (Nejeschleba, T.; Michalík, J.), s. 50-89 ISBN 978-80-244-4851-0. [Latin Alchemical Literature of Czech Provenance. Olomouc (CZ), 16.10.2014-17.10.2014] R&D Projects: GA ČR GAP405/12/1268 Institutional support: RVO:68378033 Keywords : alchemy * art history * iconography * theosophy * Heinrich Khunrath Subject RIV: AL - Art, Architecture, Cultural Heritage

  2. Decoding the Hermetic Discourse in Salomon Trismosin's Splendor Solis - A Semiotic Study of Three Ways of Reading

    Directory of Open Access Journals (Sweden)

    J. Peter Södergård

    1996-01-01

    Full Text Available Alchemy and the Hermetic Art are terms that denote a most interesting transitional space, circumscribing an opaque region of human cultural history, shared between matter and psyche, between phantasmagoric reveries and practical experiments, between sincere natural theology and conscious fraud. This is an area of human experience that has been notoriously difficult to define and understand, and which has triggered off contradictory interpretations that are, in their own, of semiotic interest. It has been said that a text — in our case Splendor Solis, and the Hermetic–alchemical texts at large — is a picnic, a Dutch party, in which the author provides the words and the reader, especially a reader with too much or too little erudition, comes up with the meaning of the words. In this article, the author tries to give an overview of the general interpretations of alchemy that have been put forward, and apply Umberto Eco's intentional approach to these interpretations, viz. consider them as various sorts of intentions. The author uses a pseudonymous alchemical tractate from the sixteenth century, Salomon Trismosin's treatise Splendor Solis as an opportunity to picture and evaluate the three main decodings of alchemy that have been attempted; a chemical, a religious—soteriological and a psychological. The author also explores the intertextual web in the Hermetic discourse, and see if its mapping can generate usable knowledge about what has, since the Middle Ages, been called alchemy: a term acknowledging the taking up of a science or art which had been cultivated by Muslim and Nestorian scholars, but with its fountain head in Late Antiquity.

  3. [Carl Gustav Jung's alchemical thinking].

    Science.gov (United States)

    Mirkiewicz, Jakub

    2004-01-01

    Carl Gustav Jung (1875-1961), Swiss psychologist and philosopher of culture used in his concepts many constructs having their source in philosophy of alchemy. These ideas can be found not only in his books on alchemy but also in his psychological works. Among them we should enumerate: the theory of psychological process, the concepts of opposites coexisting in the psyche, the polar structure of notions in his psychological system and the idea of synchronicity. The author of this article examines these main points of Jungian program within the context of its parallelism with paracelsian alchemical philosophy of nature: the process of nature, alchemical dialectics and the universal analogy of micro- and macrocosmos. At the beginning of his work, creating his psychology Jung assumed similar ideas. Later, when he noticed this similarity, alchemy became very helpful in his research of psyche, because thanks to them he conceptualised the successive aspects of polar structure of dynamical psychical reality, which--like his alchemical predecessors--he used to explain basics of the micro- and macro-world. PMID:17152876

  4. Cognitive aesthetics of alchemical imagery.

    Science.gov (United States)

    Connolly, Angela M

    2013-02-01

    Jung's contribution to the understanding of the relevance of psychology to alchemy has become increasingly invalidated by the ahistorical nature of his approach, just as his tendency to ignore the importance of cognitive aesthetics for an improved comprehension of the functions of alchemical images has prevented Jungians from further extending Jung's insight of the importance of alchemy for psychology. This paper explores the history of the development of alchemical illustrations in Western Europe from the 14(th) to the 16(th) century, tracing the emergent processes over time. It is only when we take into consideration the historical dimension and the aesthetics of alchemical imagery that it becomes possible to demonstrate how the increasing use of certain aesthetic techniques such as the disjunction and recombination of separate metaphorical elements of previous illustrations, the use of compressive combinations and the use of framing devices worked to gradually increase the cognitive function and the symbolical power of the images. If alchemy is still relevant to psychotherapy it is exactly because it helps us to understand the importance of cognitive aesthetics in our approach to the images, metaphors and narratives of our patients. PMID:23350996

  5. The way of sex: Joseph Needham and Jolan Chang.

    Science.gov (United States)

    Rocha, Leon Antonio

    2012-09-01

    This paper analyses the understandings of Daoist alchemy and Chinese sexuality of Joseph Needham and his friend and correspondent, the Chinese-Swedish writer Jolan Chang (Chang Chung-lan, 1917-2002). Using the extensive correspondence between the two men, as well as Needham's files on "inner alchemy" deposited at the Needham Research Institute, the paper begins with a partial reconstruction of a 1977 symposium, chaired by Needham, to promote Chang's new book, The Tao of Love and Sex: The Ancient Chinese Way to Ecstasy. Needham and Chang's visions of Chinese sex are then read against excerpts from Science and Civilisation in China, specifically Volume V: Chemistry and Chemical Technology, Part 5: Spagyrical Discovery and Invention: Physiological Alchemy (1983). Three inter-related aspects are explored. First, reading Science and Civilisation in China against materials in the Needham archives offers crucial hints to Needham's historiography and historical practice. Second, the way that Daoist regimens came to be actively reconstructed and repackaged as practices concerned with the enhancement of sexual pleasure and intensity. Third, the investigation of the networks and circulations of assumptions, visions, fantasies about "China". PMID:22652507

  6. Microcrystallography and chemical microanalysis of polycrystalline Nb3Sn superconductors

    International Nuclear Information System (INIS)

    Small amounts of certain alloying elements, in particular Ti and Ta, increase the upper critical magnetic field in superconducting Nb3Sn. In order to understand the influence of alloying elements on the superconducting properties, knowledge about the site occupancy of the alloying elements is important. The authors used the ALCHEMI technique (described in J. Appl. Cryst. 15: 378(1982)) to locate alloying elements in Nb3Sn. This problem differs from previous ALCHEMI studies in that the material is fine grained and the interior of individual crystal grains has to be analyzed by using a small electron probe. The (222) systematic row was used. ALCHEMI experiments were performed on a Nb3Sn specimen containing 3 at.% Ti and one containing 2 at.% Ta, and it was found that both elements occupy the Nb site. The usefulness of analytical electron microscopy is demonstrated. By using a small electron probe and detecting the x-ray signal, spatial variations in composition and a microscopic scale as well as crystal-site occupancy of low atomic concentrations in small crystal grains were determined. 5 references, 3 figures

  7. Crawler Architecture Using Grid Computing

    Directory of Open Access Journals (Sweden)

    M.E.ElAraby

    2012-07-01

    Full Text Available Crawler is one of the main components in the search engines which use URLs to fetch web pages to build a repository of web pages starting with entering URL. Each web page is parsed to extract the URLs included in it and store the extracted URLs in the URLs Queue to fetch by the crawlers in sequential. The process of crawling takes long time to collect more web pages, and it has become necessary to utilize the unused computing resources and cost/time savings in organizations. This paper deals with the crawler of search engine using grid computing. This paper presents the grid computing that has been implemented by Alchemi. Alchemi is an open source project developed at the University of Melbourne, provides middleware for creating an enterprise grid computing environment. The crawling processes are passed toAlchemi manager which distribute the processes over a number of computers as executors. The search engine crawler with the grid computing is implemented, tested and the results are analyzed. There is an increase in performance and less time over the single computer.

  8. APFIM investigations on site occupancies of the ternary alloying elements Cr, Fe, and Re in NiAl

    International Nuclear Information System (INIS)

    The site occupancies of the transition metals Cr, Fe, and Re dissolved in NiAl of stoichiometric composition have been determined by atomic layer resolved atom probe field-ion microscopy (APFIM). The investigations were supported by X-ray diffraction studies to evaluate the lattice parameters. These are influenced by atomic size effects and constitutional lattice defects like Ni antistructure atoms in the Al sublattice and vacancies in the Ni sublattice. The APFIM results were compared with ALCHEMI data and calculated site preference energies published in the literature. Chromium additions to stoichiometric NiAl with 0.8 at% in solid solution exhibit a strong preference for Al sites. The lattice parameter of NiAl(Cr) solid solution is decreased. Iron atoms dissolved in higher concentrations of 5 at % in NiAl are almost equally distributed within both sublattices. They are possessing a weak preference for Al sites, which causes a lattice expansion of NiAl(Fe) solid solution. ALCHEMI results and site preference energy data show a strong site preference of Cr atoms for the Al sublattice. In contrast, iron atoms exhibit a weak site preference for Ni sites depending upon the stoichiometry of the NiAl host lattice. Re solutes in low concentrations of about 0.2 at % in NiAl possess a strong site preference for the Ni sublattice. The increase of the lattice parameter of NiAl(Re) is due to the pronounced size effect of Re atoms. For these species no ALCHEMI and site preference energy data are available in the literature

  9. Walter Odington's De etate mundi and the Pursuit of a Scientific Chronology in Medieval England.

    Science.gov (United States)

    Nothaft, Carl Philipp

    2016-01-01

    This article deals with a forgotten treatise on the age of the world, written between 1308 and 1316 by Walter Odington, a monk of Evesham Abbey, otherwise known for his writings on alchemy and music theory. By tracing the sources and rationale behind Odington's arguments and comparing them with those of other medieval authors, the article attempts to shed new light on the state of chronological scholarship in England in the eleventh to fourteenth centuries, when astronomical and astrological methods were freely used to supplement or replace scriptural interpretation, yielding creative and unexpected results. PMID:27320253

  10. ‘The History of Hindu Chemistry’ A Critical Review

    OpenAIRE

    Harsha, N M; Nagaraja, T.N

    2010-01-01

    ‘The History of Hindu Chemistry’ is one of the rare, important books published in twentieth century. Sir Prafulla Chandra Ray, the author of this book, who was a chemist by profession, has contributed greatly to the field of Rasashastra in his own style. The book in two volumes is in English and has achieved international recognition. The work became the cause of enlightening people specially, the Westerners about Indian Alchemy which, they were till then unaware of. In a way, ‘globalization’...

  11. Tendzin Phuntso's Chemistry of Salts

    Institute of Scientific and Technical Information of China (English)

    ZhangSheng; CaiJingfeng

    2003-01-01

    An examination of large quantities of Tibetan data for a project entitled "Alchemy and Alchemic Medicines of Tibet revealed that ancient Tibetan terminology for and classification of inorganic salts have much in common with modern chemistry. This is particularly true of research conducted by Tendzin Phuntso (born in 1672 in Gongjo Count, Chamdo, Tibet) and his representative work, "gso rig gcesb dus rin chen phreng ba bzugs so". This work summarizes Tibetan recognition of inorganic salts in chemistry over the course of 1000 years or more, and is of great significance in the world history of science and technolgy.

  12. “Though Hermes never taught thee”: The Anti-Patriarchal Tendency of Charles Brockden Brown’s Mercurial Outcast Carwin, the Biloquist

    Directory of Open Access Journals (Sweden)

    Evert Jan van Leeuwen

    2010-02-01

    Full Text Available This article traces the allusions to the utopian cultural schemas of alchemy and hermetic philosophy in Charles Brockden Brown’s Wieland and “Memoirs of Carwin the Biloquist” in order to show that the mysterious anti-hero Carwin does not have to be cast in the role of gothic villain but instead can play the part of marginalised utopian idealist, whose dissident presence in the novel reveals that the seemingly enlightened community of Mettingen is in fact reliant on old-world patriarchal ideology to ensure its stability.

  13. The Alchemist in Fiction: The Master Narrative

    Directory of Open Access Journals (Sweden)

    Roslynn Haynes

    2006-06-01

    Full Text Available In Western culture, as expressed in fiction and film, the master narrative concerning science and the pursuit of knowledge perpetuates the archetype of the alchemist/scientist as sinister, dangerous, and possibly mad. Like all myths this story may appear simplistic but its recurrence suggests that it embodies complex ideas and suppressed desires and fears that each generation must work through. This paper explores some of the most influential examples of such characterization, links them to contemporary correlatives of the basic promises of alchemy and suggests reasons for the continuing power of such images.

  14. The Diffident Naturalist Robert Boyle and the Philosophy of Experiment

    CERN Document Server

    Sargent, Rose-Mary

    1995-01-01

    In a provocative reassessment of one of the quintessential figures of early modern science, Rose-Mary Sargent explores Robert Boyle's philosophy of experiment, a central aspect of his life and work that became a model for mid- to late seventeenth-century natural philosophers and for many who followed them. Sargent examines the philosophical, legal, experimental, and religious traditions—among them English common law, alchemy, medicine, and Christianity—that played a part in shaping Boyle's experimental thought and practice. The roots of his philosophy in his early life and education, in his re

  15. The world made by Noble prize : chemistry volume II

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-06-15

    This book has two parts of items related chemistry. The contents of the first part are Preface, Alfred Bemhard Nobel, Pioneers without Nobel Prize, Garbage Bag, Non-sticky Frying Pan, Nylon Stockings, Plastic Electricity, Synthetic Dyestuff, Gin and Tonic, Soccer Ball, Fertilizer, DDT, Dentifrice, Kimchi, Makgeolli, Ice cream, Anodyne, and firefly. The contents of the second part are PET-MRI, Color photo, Holography, Art diamond, an incandescent lamp and Neon Sign, Imitation works, Alchemy, Nuclear Power plant, Synthetic Oil and Sugar, Propane gas, Water Car, Estate agency Mars, and reference.

  16. The world made by Noble prize : chemistry volume II

    International Nuclear Information System (INIS)

    This book has two parts of items related chemistry. The contents of the first part are Preface, Alfred Bemhard Nobel, Pioneers without Nobel Prize, Garbage Bag, Non-sticky Frying Pan, Nylon Stockings, Plastic Electricity, Synthetic Dyestuff, Gin and Tonic, Soccer Ball, Fertilizer, DDT, Dentifrice, Kimchi, Makgeolli, Ice cream, Anodyne, and firefly. The contents of the second part are PET-MRI, Color photo, Holography, Art diamond, an incandescent lamp and Neon Sign, Imitation works, Alchemy, Nuclear Power plant, Synthetic Oil and Sugar, Propane gas, Water Car, Estate agency Mars, and reference.

  17. The world made by Noble prize : chemistry volume I

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-06-15

    This book contains two parts about items by chemistry. The first part introduces Alfred Bernhard Nodel, Pioneers without Nobel Prize, Garbage Bag, Non-sticky Frying Pan, Nylon Stockings, Plastic Electricity, Synthetic Dyestuff, Gin and Tonic, Soccer Ball, Fertilizer, DDT, Dentifrice, Kimchi, Makgeolli, Ice cream, Anodyne and Firefly. The second part lists PET-MRI, Color photo, Holography, Art diamond Incandescent lamp and Neon Sign, Imitation work, Alchemy, Nuclear Power plant, Synthetic Oil and Sugar, Freon gas, Water Car, Estate agency Mars, and winners of Nobel prize in physics.

  18. The world made by Noble prize : chemistry volume I

    International Nuclear Information System (INIS)

    This book contains two parts about items by chemistry. The first part introduces Alfred Bernhard Nodel, Pioneers without Nobel Prize, Garbage Bag, Non-sticky Frying Pan, Nylon Stockings, Plastic Electricity, Synthetic Dyestuff, Gin and Tonic, Soccer Ball, Fertilizer, DDT, Dentifrice, Kimchi, Makgeolli, Ice cream, Anodyne and Firefly. The second part lists PET-MRI, Color photo, Holography, Art diamond Incandescent lamp and Neon Sign, Imitation work, Alchemy, Nuclear Power plant, Synthetic Oil and Sugar, Freon gas, Water Car, Estate agency Mars, and winners of Nobel prize in physics.

  19. Defects and site occupancies in Nb-Cr-Ti C15 Laves phase alloys

    International Nuclear Information System (INIS)

    In the Nb-Cr-Ti system, there is a complete solid solution between NbCr2 and TiCr2 with a significant range of solubility for the C15 phase and a large two-phase region of bcc and C15. The Nb-Cr-Ti phase diagram (950 C isothermal section) is shown. The initial characterization by transmission electron microscopy (TEM) of the defect structure of an alloy of overall composition Nb10Cr75Ti15 is discussed here. Additionally, Atom Location by CHanneling Enhanced MIcroanalysis (ALCHEMI) was employed to examine the site occupancies of the Nb, Cr and Ti in this C15 Laves phase

  20. Axial electron-channelling analysis of perovskite

    International Nuclear Information System (INIS)

    The orientation dependence of characteristic X-ray emission (the Borrmann effect) under near-zone-axis diffraction conditions has been used to identify the site preferences of strontium, zirconium and uranium impurities within a CaTiO3 (perovskite) host structure. As characteristic emission lines from these impurities occur at both higher and lower energies than the calcium or titanium K-shell excitations, effects of delocalization are clearly measureable, and are used as a tool in axial electron channeling or ALCHEMI analysis. It is found that strontium and uranium strongly partition into calcium sites, whereas zirconium occupies titanium sites. (author)

  1. Valency state changes in lanthanide-contained systems under high pressure

    International Nuclear Information System (INIS)

    Changes in valency state induced by pressure in samarium sulphide SmS remind one of alchemy, as the mat black initial substance shines golden after the electron transition. The alchemist's dream is of course not realized, however the compound does exhibit an unusually interesting behaviour in the new state. The valency state of samarium as newly appeared fluctuated very rapidly between two electron configurations. Manipulation of the valency state by pressure or chemical substitution can basically change the physical properties of systems containing lanthanides. The phenomena are described and discussed in the following survey. (orig.)

  2. Mixtum compositum: oniric image in the analytical treatment of a Transsexual FtM

    Directory of Open Access Journals (Sweden)

    Mario Gullì

    2014-12-01

    Full Text Available The aim of this paper is to analyze the process of individuation of a transsexual female to male using the dream analysis in Jungian perspectives. The dreams were amplified using fairy-tales, alchemy, and archetypes theory. After a description of some dreams of the beginning of therapy it was suggest that was symbolized image of androgynous as representation of emersion of the archetypes of Anima and Animus and the integration of this image can facilitated individuation process and Self constellation. It seems that take place in a dream with a Self image confirming that analytical process can facilitate personal growth and the integration between consciousness and unconsciousness.

  3. [Wine and alcohol in apothecaries' shops during the Middle Ages in Southern countries].

    Science.gov (United States)

    Bénézet, J P

    2001-01-01

    Alcohol, wine and their derivatives do not play during the Middle Ages the role they played during Antiquity. The reading of ancient authors by Arab doctors was probably at the origin of this lack of interest for wine. As ordinary wine, medicinal wines were a matter of conviviality more than of therapeutics. Vinegar was more often used, maybe because of its lack of inebriating properties. Alcohol, this mysterious product, was probably more pertinent in the area of alchemy. Doctors and pharmacists of the enlightened age gave it a new importance. The influence of Islam on Middle Age medicine in Christian occident could explain this lack of interest for wine. PMID:11944654

  4. Pedagogy of the imagination: philo-poesis, non.verifiable truths, and other existent.ial celebrations

    OpenAIRE

    Elza, Daniela Bouneva

    2011-01-01

    The central theme of this thesis is philo-poesis. The work engages the hearts of educators, speaks to a way of being in the world that calls us to attention, to an embodied awareness of the poetry that is our lives. Philo-poesis is a practice: an experiment in the alchemy of the imagining/thinking/embodied being. Philo-poesis requires active perception: a way of thinking and dreaming with the world, while at the same time cultivating the awareness of potentialities in the moment. Philo-poesis...

  5. Legacy of the Luoshu the 4,000 year search for the meaning of the magic square of order three

    CERN Document Server

    Swetz, Frank

    2008-01-01

    A symbol of the Divine, a good luck charm, a cosmogram of the world order, a template for fengshui -through the ages, the luoshu, or magic squre of order three, has fascinated people of many different cultures. In this riveting account of cultural detective work, renowned mathematics educator, Frank J. Swetz relates how he uncovered the previously hidden history of the luoshu, from its Chinese origins, shrouded in legend, through its eventual association with Chinese fortunetelling, Daoism, and fengshui, to its incorporation into Islamic astrology and alchemy and its migration into Kabbalistic

  6. The Birth of Modern Chemistry

    OpenAIRE

    Rayner, Thomas Allan; Mackevica, Aiga

    2009-01-01

    Alchemy was a science practiced for more than two millennia up till the end of 18th century when it was replaced by modern chemistry, which is practiced up till this very day. The purpose of this report is to look into this shift and investigate whether this shift can be classified as a paradigm shift according to the famous philosopher Thomas Kuhn, who came up with a theory on the structure of scientific revolutions. In order to come to draw any kind of conclusions, the report...

  7. Alchymie, astrologie a poznávání přírody v prostředí posledních pánů z Rožmberka

    Czech Academy of Sciences Publication Activity Database

    Purš, Ivo

    České Budějovice: Národní památkový ústav, územní odborné pracoviště v Českých Budějovicích, 2011 - (Pánek, J.), s. 286-293, 294-297. (Rožmberský rok). ISBN 978-80-85033-31-1 Institutional research plan: CEZ:AV0Z80330511 Keywords : alchemy * Rosenbergs Subject RIV: AL - Art, Architecture, Cultural Heritage

  8. Nearly ferromagnetic Fermi-liquid behaviour in YFe2Zn20 and high-temperature ferromagnetism of GdFe2Zn20

    Science.gov (United States)

    Jia, S.; Bud'Ko, S. L.; Samolyuk, G. D.; Canfield, P. C.

    2007-05-01

    One of the historic goals of alchemy was to turn base elements into precious ones. Although the practice of alchemy has been superseded by chemistry and solid-state physics, the desire to dramatically change or tune the properties of a compound, preferably through small changes in stoichiometry or composition, remains. This desire becomes even more compelling for compounds that can be tuned to extremes in behaviour. Here, we report that the RT2Zn20 (R=rare earth and T=transition metal) family of compounds manifests exactly this type of versatility, even though they are more than 85% Zn. By tuning T, we find that YFe2Zn20 is closer to ferromagnetism than elemental Pd, the classic example of a nearly ferromagnetic Fermi liquid. By submerging Gd in this highly polarizable Fermi liquid, we tune the system to a remarkably high-temperature ferromagnetic (TC=86K) state for a compound with less than 5% Gd. Although this is not quite turning lead into gold, it is essentially tuning Zn to become a variety of model compounds.

  9. Superconductivity:

    Science.gov (United States)

    Sacchetti, N.

    In this paper a short historical account of the discovery of superconductivity and of its gradual development is given. The physical interpretation of its various aspects took about forty years (from 1911 to 1957) to reach a successful description of this phenomenon in terms of a microscopic theory At the very end it seemed that more or less everything could be reasonably interpreted even if modifications and refinements of the original theory were necessary. In 1986 the situation changed abruptly when a cautious but revolutionary paper appeared showing that superconductivity was found in certain ceramic oxides at temperatures above those up to then known. A rush of frantic experimental activity started world-wide and in less than one year it was shown that superconductivity is a much more widespread phenomenon than deemed before and can be found at temperatures well above the liquid air boiling point. The complexity and the number of the substances (mainly ceramic oxides) involved call for a sort of modern alchemy if compounds with the best superconducting properties are to be manufactured. We don't use the word alchemy in a deprecatory sense but just to emphasise that till now nobody can say why these compounds are what they are: superconductors.

  10. Electron microdiffraction and channeling: Theory and applications

    International Nuclear Information System (INIS)

    Three related topics in the theory of dynamical kilovolt electron diffraction are treated, and one practical application of the theory is provided. The first topic concerns the theory of coherent electron microdiffraction for atomic clusters and precipitates. The visibility of High Order Laue Zone (HOLZ) lines within the central-beam disk of coherent electron-microdiffraction patterns was studied using dynamical electron-diffraction theory. The electron source size is also shown to affect HOLZ line visibility. Coherent electron-microdiffraction patterns were obtained from a new crystalline precipitate found in silicon wafers annealed at 635 degree C for 256 h. The most likely structure is that of keatite (SiO2, tetragonal). The implications for the study of oxygen precipitation in silicon are discussed. The second theoretical topic concerns the possibilities for determining the sites of adatoms on surfaces by measurements of the x-ray or Auger electron yield as a function of diffraction conditions in the RHEED geometry. Finally, the effects of wave-function dimensionality and inelastic localization on ALCHEMI (Atom Location by Channeling Enhanced Microanalysis) has been studied. The original ALCHEMI equations are shown to hold for certain conditions

  11. Ammonia in the environment: From ancient times to the present

    International Nuclear Information System (INIS)

    Recent research on atmospheric ammonia has made good progress in quantifying sources/sinks and environmental impacts. This paper reviews the achievements and places them in their historical context. It considers the role of ammonia in the development of agricultural science and air chemistry, showing how these arose out of foundations in 18th century chemistry and medieval alchemy, and then identifies the original environmental sources from which the ancients obtained ammonia. Ammonia is revealed as a compound of key human interest through the centuries, with a central role played by sal ammoniac in alchemy and the emergence of modern science. The review highlights how recent environmental research has emphasized volatilization sources of ammonia. Conversely, the historical records emphasize the role of high-temperature sources, including dung burning, coal burning, naturally burning coal seams and volcanoes. Present estimates of ammonia emissions from these sources are based on few measurements, which should be a future priority. - Past ammonia applications reveal new emphases in biospheric transformations

  12. Reduction of electron channeling in EDS using precession

    International Nuclear Information System (INIS)

    We demonstrated that EDS measurement can be significantly improved by precessing the electron beam, thereby reducing electron channeling effects. For a SrTiO3 specimen orientated along the [001] zone axis, the measured strontium to titanium atomic ratio was 0.74–0.80 using conventional EDS methods, and the ratio was improved to ∼0.99 by precessing the electron beam for angles greater than 22.54 mRad. In ALCHEMI-like experiments in which the specimen was tilted to near two-beam condition, the strontium to titanium ratio was insensitive to the deviation from the Bragg condition using a precessed electron beam. Similar reduction of electron channeling effects was also observed in precession-assisted EDS measurements for an L21-ordered Fe2MnAl intermetallic alloy tilted to the [011] zone axis as well as near two-beam conditions. - Highlights: ► PED significantly reduces electron channeling effects under strong diffraction conditions such as zone axis and two-beam conditions. ► For the [0 0 1] zone axis, the Sr/Ti ratio measured using EDS was consistently ∼0.99 when the precession angle greater than 22.54 mRad. ► For ALCHEMI-like experiments, the channeling effects were largely suppressed when at a higher angle of 47.48 mRad

  13. Site determination of Ni atoms in Cu-Al-Ni shape memory alloys by electron channelling enhanced microanalysis

    International Nuclear Information System (INIS)

    The crystallographic site of Ni atoms in the parent phase of differently heat-treated Cu-28.6Al-3.7Ni (at.%) shape memory alloys has been examined by electron channelling enhanced microanalysis (ALCHEMI) in order to clarify effects of heat-treatments on the Ni atom site and Ms temperature. The heat-treatments were as follows: (a) Quenching into a 10% NaOH solution at 263 K, (b) Quenching into hot water at 363 K and (c) Aging at 523 K for 3.6 ks after treatment (b). The Ms temperatures of specimens (a), (b) and (c) were 158, 185 and 259 K, respectively, increasing with lowering quenching rate or aging. ALCHEMI revealed that Ni atoms occupied an identical site in all the three kinds of specimens: The Ni atoms were located at the nearest neighbor sites around Al atoms. This preferential occupation of Ni atoms was attributed to the strong binding force between Ni and Al atoms. Thus, the change in Ms temperature due to different heat-treatments was not directly related to the crystallographic site of Ni atoms, but might be caused by the ordering between the next nearest neighbor Cu and Al atoms. (author)

  14. Electron channelling: a method in real-space crystallography and a comparison with the atomic location by channelling-enhanced microanalysis

    International Nuclear Information System (INIS)

    A method is described to show how electron channelling can successfully be applied to the determination of substitutional and interstitial lattice sites of atoms in crystals. The experiments are performed in a conventional transmission electron microscope equipped with an X-ray detector. The method includes the detailed measurement of channelling profiles as well as calculations of these profiles. A fitting procedure allows us to determine the location of specific atoms within the elementary cell. It is found that a good fit is obtained only if the interference of Bloch waves, the X-ray production by inelastically scattered electrons, the delocalization of the inner-shell ionization event, and the crystal thickness and shape are considered in the calculation. The applicability of the method is demonstrated by applying it to known crystal structures (Mo and GaAs). Its relation to atomic location by channelling-enhanced microanalysis (ALCHEMI) and the problems of ALCHEMI are discussed. A comparison with channelling with positively charged particles is given. (author)

  15. La rationalité de l’hermétisme.

    Directory of Open Access Journals (Sweden)

    Bernard Joly

    2004-04-01

    Full Text Available Les théories alchimiques du XVIIe siècle furent souvent appelées hermétiques pour marquer leur attachement à une tradition indépendante de l’aristotélisme et du galénisme, dont Hermès Trismégiste aurait été le fondateur. Cette référence à une tradition mythique ne fait cependant pas de l’alchimie une science occulte. L’alchimie classique, qui était la chimie de son temps, doit être distinguée des doctrines irrationnelles qui, sous le nom d’ésotérisme, se sont développées au XIXe siècle.Alchemical theories in the 17th century were frequently called hermetic because of their attachment to an independent tradition started by Hermes Trismegitus and not by Aristotle or Galen. Despite it refers to a mythical tradition, alchemy is not an occult science. Classical alchemy was the chemistry of his time and has to be distinguish from irrational tenets which expand during the 19th century as esoterism.

  16. Legends about Legends: Abraham Eleazar's Adaptation of Nicolas Flamel.

    Science.gov (United States)

    Priesner, Claus

    2016-02-01

    This paper explores the relationship between three illustrated alchemical treatises, all of which are associated with Jewish adepts: the famous Le Livre des figures hieroglyphiques attributed to Nicolas Flamel, and two treatises published in 1735 in Erfurt-the Uraltes Chymisches Werckh and the Donum Dei. The Werckh is supposedly written by Rabbi Abraham Eleazar, while the Donum Dei is attributed to an ancient alchemist-cabalist, Rabbi Samuel Baruch. I argue that these authors are fictitious, and that both works were in fact written in the early eighteenth century by their supposed editor, the probably pseudonymous Julius Gervasius. Gervasius connects the Werckh with the legend of Nicolas Flamel by suggesting that it is based on the original, Jewish manuscript which helped Flamel to find the Stone of the Sages. Gervasius used various strategies to confer a sense of Jewish "authenticity" on these works, borrowing from contemporary (non-Jewish) perceptions of Jewish ritual, Hebrew language, and Christian Cabala. The Werckh also borrows and adapts a sequence of allegorical illustrations from those in pseudo-Flamel's Livre, and I compare the two sets of figures and, where possible, interpret them. I conclude that the later works in fact teach us far more about the state of alchemy in the seventeenth and eighteenth centuries than they do about either medieval alchemy or Judaism. PMID:27376176

  17. Views on history in medieval alchemical writings.

    Science.gov (United States)

    Obrist, Barbara

    2009-11-01

    During the Middle Ages, the prevailing conception of the history of alchemy was that of a genealogical line of descent--both carnal and spiritual--where the original paternal figure was invested with the role of ensuring unity of knowledge. The relationship between this figure and its descendants was one of genus and species. On an epistemological level, the genealogy of knowledge entails the idea of an initial full revelation of knowledge, and its subsequent (partial) loss and recovery. Fundamentally, this view precludes the idea of progress. However, within the frame of history of salvation, alchemy was being assigned a particular role. In writings of, or associated with, Franciscan spirituals, it was meant to provide both material and spiritual support for fighting the Antichrist. From the early fourteenth century onwards, the adherence to a Christocentric and anthropocentric perspective favoured the idea of progress, in the sense that human knowledge of natural and artificial transformations was considered to be increasingly complete. This progress was considered primarily to be one of spiritual perfection, aimed at restoring the nature of man. PMID:20506703

  18. Ordering and site occupancy of D03 ordered Fe3Al-5 at%Cr evaluated by means of atom probe tomography

    KAUST Repository

    Rademacher, Thomas W.

    2011-05-01

    Addition of ternary elements to the D03 ordered Fe3Al intermetallic phase is a general approach to optimise its mechanical properties. To understand the physical influences of such additions the determination of the probability of site occupancies of these additions on the lattice site and ordering parameters is of high interest. Some common experimental techniques such as X-ray diffraction or Atom Location by Channelling Enhanced Microanalysis (ALCHEMI) are usually applied to explore this interplay. Unfortunately, certain published results are partly inconsistent, imprecise or even contradictory. In this study, these aspects are evaluated systematically by atom probe tomography (APT) and a special data analysis method. Additionally, to account for possible field evaporation effects that can falsify the estimation of site occupancy and induce misinterpretations, APT evaporation sequences were also simulated. As a result, chromium occupies most frequently the next nearest neighbour sites of Al atoms and local ordering parameters could be achieved. © 2010 Elsevier B.V.

  19. The Innermost Kernel Depth Psychology and Quantum Physics. Wolfgang Pauli's Dialogue with C.G Jung

    CERN Document Server

    Gieser, Suzanne

    2005-01-01

    "The Innermost Kernel" recounts the physicist and Nobel Laureate Wolfgang Pauli and his interest in Jungian psychology, philosophy and western world-view. It is also an exploration of the intellectual setting and context of Pauli's thinking, which has its starting point in the cultural and intellectual climate of fin-de-siècle Europe. As a contribution to the general history of quantum physics this study has a special focus on the psychological and philosophical issues discussed by physicists belonging to the Copenhagen school. The work is mainly based on the correspondence of the principle characters and explores some of the central issues discussed there, as for instance the subject-object relation, complementarity, the relation of conscious and unconscious, the process underlying concept-formation, the psychology of scientific discovery, the symbolic world of alchemy, the theories of archetypes and of synchronicity. Ultimately this book is about a remarkable scientist searching for a new understanding of ...

  20. Los griegos y la doctrina esotérica de los elementos

    Directory of Open Access Journals (Sweden)

    Ronald Casas Ulate

    2016-03-01

    Full Text Available According to Empedocles, a Greek philosopher, scientist, healer and ser, who lived in Sicily in the fifth century B.C., all m atter consists of “rootclumps” or elements. Empedocles described these elements not only as physical manifestations, but also as spiritual essences. He as associated them with four gods and goddesses. Empedocles philosophy was influenced by Pythagoras and by the ancient greek mystery traditions. In the works and practices of the alchemists, neoplatonists and gnostics that further developed his theories, the elements are not only material and spiritual forces, but also facets of a human being. Their varying combinations result in different personality types. Carl Gustav Jung (1875 – 1961, one of the founders of modern psychology, studied mystical literature and alchemy and his conceptualization of the four basic components of personality is a derivation of Empedocles ancient theories about earth, water, air and fire.

  1. "To Improve upon Hints of Things": Illustrating Isaac Newton.

    Science.gov (United States)

    Schilt, Cornelis J

    2016-01-01

    When Isaac Newton died in 1727 he left a rich legacy in terms of draft manuscripts, encompassing a variety of topics: natural philosophy, mathematics, alchemy, theology, and chronology, as well as papers relating to his career at the Mint. One thing that immediately strikes us is the textuality of Newton's legacy: images are sparse. Regarding his scholarly endeavours we witness the same practice. Newton's extensive drafts on theology and chronology do not contain a single illustration or map. Today we have all of Newton's draft manuscripts as witnesses of his working methods, as well as access to a significant number of books from his own library. Drawing parallels between Newton's reading practices and his natural philosophical and scholarly work, this paper seeks to understand Newton's recondite writing and publishing politics. PMID:27071300

  2. The Radium Terrors. Science Fiction and Radioactivity before the Bomb.

    Science.gov (United States)

    Candela, Andrea

    2015-01-01

    At the beginning of the 20th century the collective imagination was fascinated and terrified by the discovery of radium. A scientific imagery sprang up around radioactivity and was disseminated by public lectures and newspaper articles discussing the ambiguous power of this strange substance. It was claimed that radium could be used to treat cholera, typhus and tuberculosis, but at the same time there were warnings that it could be used for military purposes. The media and the scientists themselves employed a rich vocabulary influenced by religion, alchemy and magic. The ambivalent power of radioactive elements exerted a great influence on science fiction novelists. This paper will examine some significant works published in Europe, America and Russia during the first decades of the 20th century and their role in the creation of the complex imagery of radioactivity that seized the public imagination long before the invention of the atomic bomb. PMID:26245007

  3. The stability of B2 compounds in Ti-modified Nb-Al alloys

    International Nuclear Information System (INIS)

    It has been found that additions of Ti to Nb3Al results in the formation of phases with the B2 crystal structure in as-cast samples. The microstructure and phase stability of two alloys, namely Nb-15Al-10Ti and Nb-15Al-40Ti (in at.%), have been studied. Heat-treatment of the Nb-15Al-10Ti alloy at 1,100 C results in the precipitation of an A15 phase in the B2 matrix. A particular orientation relationship exists between the two phases. Heat-treatment above 1,600 C results in the dissolution of the second phase. The ALCHEMI technique has been employed to assess qualitatively the distribution of atom types over the two sublattices of the B2 compound

  4. Supervising the uncanny: the play within the play.

    Science.gov (United States)

    Leader, Carol

    2015-11-01

    The writer offers a combined experience in analysis and the performing arts to explore uncanny aspects of the unconscious subtext of the patient's inner drama; subtext which can remain hidden from view in supervision. Freud and Jung's understanding of uncanny experience is considered together with a painting from medieval alchemy and Matte Blanco's conceptions concerning the symmetrical nature of unconscious process. Theatre and the work of the theatre director and actor in approaching the multidimensional aspects of a play are then introduced. Finally clinical case material from group supervision demonstrates how the 'theatre of therapy' and the work of the supervisory couple and group promote the emergence of a more authentic conscious asymmetrical response to the patient's 'script' that can break the 'spell' of the transference/countertransference relationship. This in turn brings meaning to the underlying and implicit 'stage directions' that the patient has been unconsciously communicating. PMID:26499298

  5. Heavy quark production

    International Nuclear Information System (INIS)

    The alchemy of the production of states containing the heavy quarks in hadron-hadron or photon-hadron collisions offers an opportunity to study hadronic dynamics in a manner not readily available elsewhere. The focus is on an approach based on a simple interpretation of QCD developed at Illinois and Argonne. This approach seems to offer the possibility of forming a connection between the dynamics of heavy particle production and recent developments in the theory of large-transverse-momentum processes. It is very interesting to see how the connection with large-P/sub T/ emerges from a fairly reasonable model. In the model discussed, the production of heavy quarks in photoproduction is thought of as arising from diagrams which constitute the lowest-order-QCD process available and are considered applicable either for a real photon or for a virtual photon arising from inelastic lepton scattering. 25 references

  6. Electron channelling enhanced microanalysis on Ni-Al-Mn and Al-Mn-Si

    International Nuclear Information System (INIS)

    Atom location by channelling enhanced microanalysis (ALCHEMI) was performed for Ni-Al-Mn compounds and Al-Mn-Si quasicrystals. For Ni75Al25-xMnx (x=5,9) with the L12-type structure, an occupation fraction of Mn atoms at the Ni site was quantitatively determined using planar channelling conditions. The occupation fraction increases with the Mn concentration or by quenching the compound from high temperature. In quasicrystals of Al74Mn20Si6 and Al68Mn20Ru8Si4, axial channelling conditions were used to locate Si and Ru, respectively. It was shown that Si atoms occupy the Al site in Al74Mn20Si6 whereas Ru atoms occupy the site different from that of Al in Al68Mn20Ru8Si4. (author)

  7. QSAR study on thiazolidine-2,4-dione derivatives for antihyperglycemic activity

    Directory of Open Access Journals (Sweden)

    Prashantha Kumar B

    2008-01-01

    Full Text Available A set of seventy four molecules belonging to the class of thioglitazones were subjected to the QSAR analysis for their antihyperglycemic activity. All the molecules were subjected to energy minimization to get 3D structures, followed by conformational analysis to get the conformation of the molecule associated with the least energy and highest stability. Various physico-chemical parameters were then calculated using ALCHEMY 2000 software, namely, thermodynamic parameters, structure-dependant parameters, topological parameters and charge-dependant parameters. Multiple linear regression analysis was carried out on all the molecules. The final equation was developed by choosing optimal combination of descriptors after removing the outliers. Cross validation was performed by leave one out method to arrive at the final QSAR model for the chosen set of molecules to exhibit antihyperglycemic activity.

  8. Defects, deformation mechanisms and phase stabilities in Nb-based B2 compounds

    International Nuclear Information System (INIS)

    Deformation mechanisms have been determined for compounds based on Nb3Al containing various additions of Ti. These compounds exhibit the B2 crystal structure and deform by activation of one or more of the following slip systems, namely left-angle 111 right-angle {110}, left-angle 111 right-angle {112} and left-angle 111 right-angle {123}. The dislocations are dissociated as superpartial pairs, each with Burgers vector, b, given by b=1/2 left-angle 111 right-angle, which bound a ribbon of antiphase boundary. Attempts have been made to determine the ordering temperatures and the ordering energy of these compounds. Estimates of the site occupancy of these nonstoichiometric B2 compounds have also been determined by the ALCHEMI technique. The phase stabilities of these compounds have been determined over a wide range of temperatures and the effect of these on mechanical properties has been assessed

  9. Cofrentes maintenance. Life essence

    International Nuclear Information System (INIS)

    Even though it may seem like something much more complex, maintenance is not more than the seed of continuity, the alchemy of eternal youth or the key to combating the cruel passage of time that haunts us all. Little does it matter where you are from or where you are going; it is irrelevant whether you are man, woman or machine. If you do not have a more or less sensible strategy of survival, reality can take you by surprise, without prior warning, at the wrong place and the wrong time. It is sad to see how what we thought was eternal, and thus do not care for and pamper as we should, eventually loses its qualities and functions over the years and fades away like a vague memory. (Author)

  10. Evidence for the occurrence of LENR-type processes in alchemic transmutations

    International Nuclear Information System (INIS)

    The relevance of experimental aspects of alchemy have been neglected for too long in the academic milieu, but in recent years more thoughtful studies of texts from the middle ages and early modern European alchemy evidence the presence of coherent and relevant laboratory practices. However, the central core of western alchemy, the quest for the Philosophers' Stone, the substance claimed to transmute base metals into gold, remains, needless to say, elusive. While no book will ever tell us how to prepare such substance, it is nevertheless also true that detailed reports on alchemic transmutations, often authored by witnesses of such events, can be found profusely in alchemic literature. These reports usually contain valuable information regarding quantitative aspects of the transmutation processes. Taking into account numerical parameters of alchemic transmutations such as the weights of starting base metal, gold and Philosophers' Stone, and the duration of the transmutation experiences, it has been found that the transmutation processes follow a specific pattern similar to that generally observed in conventional catalytic reactions. In the present work, several examples of alchemic practices and objects are reported that, taken as a whole, challenge our actual view on the constitution of matter. First, new data are presented which support the catalytic-like performance of the Philosophers' Stone. Indeed, such behaviour is consistent with the alchemic view on the evolution of metals, which conceives the transmutation as an acceleration of the ripening of base metals towards the more perfect gold which takes place in Nature by means of a slow maturation process inside the Earth's womb. Second, differences between the weight of the starting base metal and the weight of the gold (or silver) obtained at the end of the transmutation process are often noticed in the texts, but no satisfactory explanation for such observation has been given so far. Weight decreases are

  11. The Scientific Legacy of Fred Hoyle

    Science.gov (United States)

    Gough, Douglas

    2011-08-01

    Introduction M. Rees; 1. Fred Hoyle's major work in the context of astronomy and astrophysics today W. L. W. Sargent; 2. Sir Fred Hoyle and the theory of the synthesis of the elements D. Arnett; 3. Fred Hoyle: contributions to the theory of galaxy formation G. Efstathiou; 4. Highlights of Fred Hoyle's work on interstellar matter and star formation P. M. Solomon; 5. Accretion H. Bondi; 6. From dust to life C. Wickramasinghe; 7. Worlds without end or beginning J. D. Barrow; 8. Evolutionary cosmologies - then and now M. S. Longair; 9. Alternative ideas in cosmology J. N. Narlikar; 10. Red Giants - then and now J. Faulkner; 11. Modern alchemy: Fred Hoyle and element building by neutron capture E. M. Burbidge; 12. Concluding remarks G. Burbidge.

  12. Visualization environment and its utilization in the ITBL building

    International Nuclear Information System (INIS)

    In recent years, visualization techniques have become more and more important in various fields. Especially in scientific fields, a large amount of numerical output data crucially needs to be changed into visualized form, because computations have grown to larger and larger scales as well as have become more complicated, so that computed results must be intuitively comprehensible by using various visualization techniques like 3D or stereo image construction. In the visualization room in the ITBL building, a 3-screen Virtual Reality system, a Portable Virtual Reality system, a Mixed Reality system, and Visualization tools like alchemy etc. are installed for the above-mentioned use. These devices enable us to easily change numerical data into visualized images of a virtual reality world with the use of eye-glasses or a head-mount-display device. This article describes the visualization environment in the ITBL building, it's use, and the tasks to be solved. (author)

  13. Cofrentes maintenance. Life essence; Mantenimiento en Cofrentes. Esencia de vida

    Energy Technology Data Exchange (ETDEWEB)

    Sala, J.

    2009-07-01

    Even though it may seem like something much more complex, maintenance is not more than the seed of continuity, the alchemy of eternal youth or the key to combating the cruel passage of time that haunts us all. Little does it matter where you are from or where you are going; it is irrelevant whether you are man, woman or machine. If you do not have a more or less sensible strategy of survival, reality can take you by surprise, without prior warning, at the wrong place and the wrong time. It is sad to see how what we thought was eternal, and thus do not care for and pamper as we should, eventually loses its qualities and functions over the years and fades away like a vague memory. (Author)

  14. History of radioactivity

    International Nuclear Information System (INIS)

    The author describes the historical development of the physics of atoms and nuclei. After a consideration of the ancient Greek philosophy concerning atoms the behaviour of gases is discussed with regards to statistical mechanics. Then the developement of chemistry from alchemy is described. Thereafter the early studies of gas discharges are described with regards to the electronic structure of atoms. In this connection the periodic system of elements is considered. Then the detection of the α-radiation of Uranium by Becquerel and the detections of M. and P. Curie are described. Thereafter the radiactive decay of nuclei is discussed. Then a popular introduction into nuclear structure is given with special regards to artificial radioactivity and nuclear fission. Finally nuclear reactors, the atomic bombs, applications of radionuclides, and problems of radiation protection are described. (HSI)

  15. Ab initio investigation of the structural and electronic properties of amorphous HgTe

    International Nuclear Information System (INIS)

    We present the structure and electronic properties of amorphous mercury telluride obtained from first-principle calculations. The initial configuration of amorphous mercury telluride is created by computation alchemy. According to different exchange–correlation functions in our calculations, we establish two 256-atom models. The topology of both models is analyzed in terms of radial and bond angle distributions. It is found that both the Te and the Hg atoms tend to be fourfold, but with a wrong bond rate of about 10%. The fraction of threefold and fivefold atoms also shows that there are a significant number of dangling and floating bonds in our models. The electronic properties are also obtained. It is indicated that there is a bandgap in amorphous HgTe, in contrast to the zero bandgap for crystalline HgTe. The structures of the band tail and defect states are also discussed. (paper)

  16. Site preference of early transition metal elements in C15 NbCr2

    International Nuclear Information System (INIS)

    The site preference of early 3d (Ti, V), 4d (Zr, Mo) and 5d (Hf, Ta, W) transition metal elements in C15 NbCr2 Laves phase was studied using first-principles calculations. According to the present calculations, at T 0 K, Zr, Hf and Ta consistently have a preference for the Nb sites in Nb-rich, Cr-rich and stoichiometric NbCr2, while the site preference of Ti, V, Mo and W varies strongly with alloy composition. Using a statistical-mechanical Wagner-Schottky model based on the canonical ensemble, the finite temperature site occupancy behavior of those transition metal elements in NbCr2 was further predicted. It was found that the site preference of Ti, V, Mo and W also depends strongly on temperature. The calculated results compare favorably with the experimental measurements using ALCHEMI and synchrotron X-ray diffraction techniques

  17. The structural and electronic properties of amorphous HgCdTe from first-principles calculations

    International Nuclear Information System (INIS)

    Amorphous mercury cadmium telluride (a-MCT) model structures, with x being 0.125 and 0.25, are obtained from first-principles calculations. We generate initial structures by computation alchemy method. It is found that most atoms in the network of amorphous structures tend to be fourfold and form tetrahedral structures, implying that the chemical ordered continuous random network with some coordination defects is the ideal structure for a-MCT. The electronic structure is also concerned. The gap is found to be 0.30 and 0.26 eV for a-Hg0.875Cd0.125Te and a-Hg0.75Cd0.25Te model structures, independent of the composition. By comparing with the properties of crystalline MCT with the same composition, we observe a blue-shift of energy band gap. The localization of tail states and its atomic origin are also discussed. (paper)

  18. Evidence for the occurrence of LENR-type processes in alchemic transmutations

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Pariente, Joaquin [Instituto de Catalisis y Petroleoquimica, CSIC, Marie Curie 2, 28049 Cantoblanco, Madrid (Spain)

    2006-07-01

    The relevance of experimental aspects of alchemy have been neglected for too long in the academic milieu, but in recent years more thoughtful studies of texts from the middle ages and early modern European alchemy evidence the presence of coherent and relevant laboratory practices. However, the central core of western alchemy, the quest for the Philosophers' Stone, the substance claimed to transmute base metals into gold, remains, needless to say, elusive. While no book will ever tell us how to prepare such substance, it is nevertheless also true that detailed reports on alchemic transmutations, often authored by witnesses of such events, can be found profusely in alchemic literature. These reports usually contain valuable information regarding quantitative aspects of the transmutation processes. Taking into account numerical parameters of alchemic transmutations such as the weights of starting base metal, gold and Philosophers' Stone, and the duration of the transmutation experiences, it has been found that the transmutation processes follow a specific pattern similar to that generally observed in conventional catalytic reactions. In the present work, several examples of alchemic practices and objects are reported that, taken as a whole, challenge our actual view on the constitution of matter. First, new data are presented which support the catalytic-like performance of the Philosophers' Stone. Indeed, such behaviour is consistent with the alchemic view on the evolution of metals, which conceives the transmutation as an acceleration of the ripening of base metals towards the more perfect gold which takes place in Nature by means of a slow maturation process inside the Earth's womb. Second, differences between the weight of the starting base metal and the weight of the gold (or silver) obtained at the end of the transmutation process are often noticed in the texts, but no satisfactory explanation for such observation has been given so far

  19. The Renaissance Conception Regarding Technology

    Directory of Open Access Journals (Sweden)

    Robert Arnăutu

    2011-11-01

    Full Text Available The Renaissance creates a clear-cut distinction between mechanical arts, which will come to be considered applied science by Bacon and Descartes, and fine arts. Dealing with the Renaissance approach to technology, this paper will focus, on the one hand, on those domains that combine theoretical and practical skills in order to create artifacts or to transform materials, and, on the other hand, with authors who debate the status of technological practices and knowledge. Thus, we will look at the developments and arguments regarding mechanics, alchemy, natural magic, mining and metallurgy, and at authors such as Georgius Agricola, Paracelsus, Masilio Ficino, Nicholas of Cusa, Galileo Galilei. The aim is to reconstruct the arguments regarding technology that challenged the established Scholastic-Aristotelian framework and made possible the Modern approaches.

  20. History of radioactivity. Geschichte der Radioaktivitaet

    Energy Technology Data Exchange (ETDEWEB)

    Minder, W.

    1981-01-01

    The author describes the historical development of the physics of atoms and nuclei. After a consideration of the ancient Greek philosophy concerning atoms the behaviour of gases is discussed with regards to statistical mechanics. Then the developement of chemistry from alchemy is described. Thereafter the early studies of gas discharges are described with regards to the electronic structure of atoms. In this connection the periodic system of elements is considered. Then the detection of the ..cap alpha..-radiation of Uranium by Becquerel and the detections of M. and P. Curie are described. Thereafter the radiactive decay of nuclei is discussed. Then a popular introduction into nuclear structure is given with special regards to artificial radioactivity and nuclear fission. Finally nuclear reactors, the atomic bombs, applications of radionuclides, and problems of radiation protection are described.

  1. The twilight of "medicine" and the dawn of "health care": reflections on bioethics at the turn of the millennium.

    Science.gov (United States)

    Mori, M

    2000-12-01

    The traditional paradigm of medicine assumes that health is a natural given depending on a body's intrinsic teleology, and that medicine aims at restoring or preserving health, making a physician only an "assistant to nature." I argue that nowadays this paradigm is becoming obsolete, because the concept of health is no longer a "natural given" and interventions on the human body attempt not only to help nature's teleology, but also to change it whenever doing so can satisfy human needs and wants. We should abandon the term "medicine" and adopt the term "health care" to mark such an epoch-making transition, analogous to that marking the passage from "alchemy" to "chemistry." PMID:11262634

  2. Restructurations et gouvernance d’entreprise en Grande-Bretagne : la vente de Rover

    OpenAIRE

    Deakin, Simon

    2011-01-01

    Cet article étudie le rôle de la législation relative à la restructuration d’entreprise dans le cadre de l’insolvabilité du constructeur automobile britannique MG Rover en 2005. Lorsque Rover a été confronté à une acquisition par la société de capital-risque Alchemy en 2000, les lois accordant aux travailleurs et à leurs représentants des droits d’information et de consultation ont semblé jouer un rôle important dans le succès d’un acquéreur rival, le consortium Phœnix, qui représentait les i...

  3. Remarks on autocatalysis and autopoiesis.

    Science.gov (United States)

    McMullin, B

    2000-01-01

    The notions of collective autocatalysis and of autopoiesis are clearly related; equally clearly, they are not quite the same. The purpose of this paper is to try to clarify the relationship. Specifically I suggest that autopoiesis can be at least roughly characterized as collective autocatalysis plus spatial individuation. Although some mechanism of spatial confinement or concentration is probably necessary to the effective operation of any collectively autocatalytic reaction network, autopoiesis requires, in addition, that the mechanism for maintaining this confinement should itself be a product of the reaction network--and should thus (?) be capable of separating or individuating otherwise identically organized networks. I suggest an informal heuristic test to discriminate the (merely) collectively autocatalytic from the (properly) autopoietic. Finally, in the light of this, I review a variety of published abstract or model systems, Alchemy, alpha-universes, Tierra, and SCL. PMID:10818568

  4. Mendeleyev’s dream the quest for the elements

    CERN Document Server

    Strathern, Paul

    2000-01-01

    In this elegant, erudite but entertaining book, Paul Strathern, the award-winning novelist and expositor of complex ideas, unravels the dramatic history of chemistry through the quest for the elements. Framing this history is the life-story of the nineteenth-century Russian scientist Dmitri Mendeleyev, who fell asleep at his desk and awoke after conceiving the Periodic Table in a dream - the template upon which modern chemistry is founded, and the formulation of which marked chemistry's coming of age as a science. From ancient philosophy, through medieval alchemy to the splitting of the atom, this is the true story of the birth of chemistry and the role of one man's dream.

  5. Introduction to stereology.

    Science.gov (United States)

    West, Mark J

    2012-08-01

    Just as astrology became astronomy and alchemy became chemistry through the application of mathematics, descriptive anatomy can be expected to become more and more quantitative in nature. This article describes the basics of stereology, which provides meaningful quantitative descriptions of the geometry of three-dimensional (3D) structures from measurements that are made on two-dimensional (2D) images. With precise mathematical descriptions such as those that can be obtained with unbiased stereological techniques, it will be possible to make concise descriptions of the relationships between structure and function, of the dynamics of structure, and to reassert the importance of quantitative morphology as an essential part of the evaluation of biological tissues. PMID:22854572

  6. Towards a Deeper Understanding of the Nucleus with Exotic Nuclei

    Science.gov (United States)

    Ormand, Erich

    2006-10-01

    Despite more than fifty years of study, many questions about now nuclei are put together remain. While nuclei near the valley of stability have provided a wealth of information, they are not sufficient to provide us with a comprehensive and unified description of the nucleus. Especially lacking is an accurate picture of those exotic species that are the basis of cosmic alchemy. The missing pieces in the puzzle can be filled in with a determined experimental and theoretical effort focusing on nuclei lying far from the valley of stability. Here, I will outline the intellectual challenges that can be addressed by proposed exotic-beam facilities, and how new experimental data will quide and refine theoretical descriptions of the nucleus.

  7. Hermetic atomism: Christian Adolph Balduin (1632-1682), Aurum Aurae, and the 1674 phosphor.

    Science.gov (United States)

    Keller, Vera

    2014-11-01

    The synthesis of phosphors, or light-bearing matter, figured largely among the activities of early scientific societies and within the first scientific journals. They were prestige objects during the formative institutionalisation of experimental natural philosophy. Nevertheless, early phosphors have often appeared within the historiography of chemistry as a throwback to an earlier era. They have been represented as a fundamental epistemic and theoretical divide between a mystical alchemy (exemplified by Christian Adolph Balduin) and modern chemistry (prefigured by progressives such as Robert Boyle). The parallel phosphoric researches of Boyle and Balduin belie this divide. Recovering the theoretical context of Balduin's phosphor can both resituate it in relation to phosphoric research of the 1670s and 1680s, as well as further illuminate the intellectual sources and development of chymical atomism. PMID:25509635

  8. Are the advocates of nuclear power and the adversaries listening to each other? Does Dialogue have a chance? Introductory remarks by John A. Macpherson

    International Nuclear Information System (INIS)

    Are the advocates of nuclear power and the adversaries listening to each other? Does dialogue have a chance? My short answer to both questions posed as the title for this discussion is 'no'. And I would add: There is no point in trying to bring opposite poles together, it requires too much investment for too little return. A nuclear dialogue will have a chance only it a distinction can be shown between physics and metaphysics, between chemistry and alchemy, and if the gap can be bridged between the polarized views of the world's societal needs which, incidentally, create the nuclear issue in the first place. This is a daunting task Movements in search of a cause have a passion for preaching rather than a love for listening

  9. Fiesta y Patria durante la Regeneración en Colombia. Santander (1886-1899

    Directory of Open Access Journals (Sweden)

    Oscar Blanco Mejía

    2012-07-01

    Full Text Available

    Resumen

    La fiesta patria durante la Regeneración en Colombia, adquiere importancia  no sólo porque es la representación de una nación católica en el país, acorde con el proyecto político implementado por los conservadores, sino además, y lo más importante,  porque cumple un papel de alquimia social, que transforma lo arbitrario en legitimo al  instaurar una rutina. Para comprender esta función, la presente ponencia pasara revista de manera breve a los orígenes de las fiestas nacionales en la región, y posteriormente, se adentrará en el  tema de la Regeneración.

     

    Palabras claves: Fiesta  republicana, regeneración, alquimia social.

     

    Abstract

    The national holiday during Regeneration in Colombia, becomes important not only because was the representation of a Catholic nation in the country, according to the political project implemented by the Conservatives, but also and most importantly, it plays the role of social alchemy, which transforms the arbitrary toward legitimate to establish a routine. To understand this function, this essay  briefly  review of the origins of national holidays in the region, and subsequently, will development  the theme of Regeneration.

     

    Keywords: Republican holiday, regeneration, social alchemy.

  10. ‘ISLANDS OF EMPOWERMENT’: ANTI-DISCRIMINATION LAW AND THE QUESTION OF RACIAL EMANCIPATION

    Directory of Open Access Journals (Sweden)

    Faisal Bhabha

    2015-09-01

    Full Text Available In her evocative masterpiece, The Alchemy of Race and Rights, published in 1991, Patricia Williams captured a moment in American legal thought that marked a turning point in expressions about race and power, and the implications for social equality. It contained lessons extending beyond America’s unique race history, to the general social and political dynamics in liberal democracy that create conditions of privilege and exclusion. She invited us to think about the place of law in the social and institutional practices that sustain status quo hierarchies, despite proclaimed civil rights commitments to justice. She also inspired hope that the role of the lawyer could be one of mutinous agitator—struggling from the inside, using the tools and skills of practice to support the causes of identifiable communities and social movements.   Dans son chef-d’œuvre évocateur, The Alchemy of Race and Rights, publié en 1991, Patricia Williams a saisi un moment dans la pensée juridique américaine qui a marqué un tournant au niveau des expressions concernant la race et le pouvoir, ainsi que les répercussions pour l’égalité sociale. L’ouvrage contenait des leçons qui allaient au-delà de l’histoire raciale unique des États-Unis et qui abordaient la dynamique sociale et politique générale de la démocratie libérale qui crée des conditions de privilège et d’exclusion. L’auteure nous a invités à examiner la place du droit dans les pratiques sociales et institutionnelles qui maintiennent les hiérarchies du statu quo, malgré les engagements en matière de droits civils qui ont été pris en faveur de la justice. Elle a aussi laissé espérer que l’avocat pourrait jouer un rôle d’agitateur rebelle — luttant de l’intérieur, en utilisant les outils et compétences pratiques pour soutenir les causes des collectivités et des mouvements sociaux identifiables.

  11. Aterradora transcendência? Uma análise simbólica do Bafomé de Éliphas Lévi (Terrifying transcendence? A symbolic analysis of Eliphas Levi's Baphomet - DOI: 10.5752/P.2175-5841.2013v11n31p1129

    Directory of Open Access Journals (Sweden)

    Ermelinda Ganem Fernandes

    2013-09-01

    Full Text Available Bafomé, a mais duradoura criação do escritor Éliphas Lévi, é um ícone do universo esotérico: é a imagem “satânica” mais conhecida da história. Na tentativa de desvendar a sua rica composição simbólica, uma exegese iconográfica será conduzida por intermédio da psicologia analítica, fundada pelo psiquiatra suíço Carl Gustav Jung. As origens de Bafomé na alquimia, na cabala e no gnosticismo serão perscrutadas e os conceitos Junguianos do inconsciente coletivo e dos arquétipos irão, em grande parte, balizar a interpretação proposta neste trabalho. Tal análise será dividida em oito subáreas, entre elas: o significado do seu aspecto animalesco na escatologia cristã, o hermafroditismo na psicologia e nas ciências arcanas, as qualidades mágicas do pentagrama e a importância hermética do caduceu. Por fim, conclui-se que o Bafomé é um símbolo de self, o arquétipo da totalidade psíquica. Bafomé tem por finalidade ser uma alternativa à imagem primordial cristã de autorrealização, mais integradora e menos repressora que esta. Palavras-chave: Alquimia. Cristianismo. Magia. Psicologia junguiana. Religião e psicologia.   Abstract Baphomet, the lasting creation of the French writer Éliphas Lévi, is an icon of the esoteric universe: it is the history’s best-known “satanic” image. In an attempt to unravel its rich symbolic composite, an iconographic exegesis will be conducted through the use of analytical psychology, founded by the Swiss psychiatrist Carl Gustav Jung. The origins of Baphomet in alchemy, Kabbalah and Gnosticism will investigated mostly through the application of Jungian concepts such as the collective unconscious and the archetypes. Such analysis will be divided into eight sub-areas, including: the significance of his animal appearance in Christian eschatology, hermaphroditism in psychology and the arcane sciences, the magical qualities of the pentagram and the importance of the caduceus in

  12. [The admirable effects of panaceas: ideas between antiquity and early modern times].

    Science.gov (United States)

    Papadopoulos, Georgios

    2011-01-01

    Panaceas, i. e. medicines that can cure many or almost all diseases, were used throughout the history from antiquity until modern times. The paper focuses on ideas developed to explain the admirable actions of these medicines. In antiquity such actions seem to be related to the large number of ingredients as well as to the presence of materials connected to potent poisons (e. g. viper flesh). Later, with the advent of alchemy, the alchemical preparation is regarded to produce medicines with such properties, the most pregnant example being lapis philosophorum. Such explanations are underpinned by the correspondences with higher astral influences as espoused by Paracelsus, as well as by van Helmont's idea that both disease and cure depend exclusively on the state of the 'spirit of life'. At the same time Galenic-like ideas survive, in the sense that panaceas are something like universal purifiers. Besides curing diseases panaceas were used to ensure long living, permanent health as well as for achieving rejuvenation. In this respect, they show an affinity to the so-called 'healing power of nature'. PMID:22400194

  13. Variable Emittance Electrochromic Devices for Satellite Thermal Control

    Science.gov (United States)

    Demiryont, Hulya; Shannon, Kenneth C.

    2007-01-01

    An all-solid-state electrochromic device (ECD) was designed for electronic variable emissivity (VE) control. In this paper, a low weight (5g/m2) electrochromic thermal control device, the EclipseVEECD™, is detailed as a viable thermal control system for spacecraft outer surface temperatures. Discussion includes the technology's performance, satellite applications, and preparations for space based testing. This EclipseVEECD™ system comprises substrate/mirror electrode/active element/IR transparent electrode layers. This system tunes and modulates reflection/emittance from 5 μm to 15 μm region. Average reflectance/emittance modulation of the system from the 400 K to 250 K region is about 75%, while at room temperature (9.5 micron) reflectance/emittance is around 90%. Activation voltage of the EclipseVEECD™ is around ±1 Volt. The EclipseVEECD™ can be used as a smart thermal modulator for the thermal control of satellites and spacecraft by monitoring and adjusting the amount of energy emitted from the outer surfaces. The functionality of the EclipseVEECD™ was successfully demonstrated in vacuum using a multi-purpose heat dissipation/absorption test module, the EclipseHEAT™. The EclipseHEAT™ has been successfully flight checked and integrated onto the United States Naval Alchemy MidSTAR satellite, scheduled to launch December 2006.

  14. "Scrisorile către un provincial" ale lui Mircea Eliade. Răspunsul unui provincial din viitor/ Mircea Eliade’s Letters for a Provincial. The Answer from a Provincial from the Future

    Directory of Open Access Journals (Sweden)

    Elvira Groza

    2006-12-01

    Full Text Available he article analyzes The Letters for a Provincial, addressed by Mircea Eliade to a hypothetical provincial in order to prepare access to the capital city. The letters are written so as to dislocate the provincial from a cultural model built on fake values and prejudices. From a mere pretext, the letters are turned into a symbolic act through which the historian of religions assumes, on the one hand, the destiny of a messenger of a new humanism, and, on the other hand, transforms the modern areligious man into a destination point for whom the provincial is the archetype. Thus, in all of Eliade’s works one can trace the same pattern of dislocation of the partial man, disconnected from archetypes and milestones, in order to re-install him on the road towards the Center, through anthropology structured on cosmic reintegration, alchemy or androgyny in the books of the Romanian period, recovery of the eternal recursion in the Western treatises, and also through the theory of the irecognoscibility of the miracle, in his last essays. The end of the article proposes an answer from the present provincial, who for Eliade was still in the future, an answer showing that the messages of the historian of religions are not reaching him, because he has lost the road towards the Center; moreover, he is situated in an ill-fated extraterritoriality, that is made possible through the great integrations at a horizontal level, and his chance would be the return to the story.

  15. Implementation of Computational Grid Services in Enterprise Grid Environments

    Directory of Open Access Journals (Sweden)

    R. J.A. Richard

    2008-01-01

    Full Text Available Grid Computing refers to the development of high performance computing environment or virtual super computing environment by utilizing available computing resources in a LAN, WAN and Internet. This new emerging research field offers enormous opportunities for e-Science applications such as astrophysics, bioinformatics, aerospace modeling, cancer research etc. Grid involves coordinating and sharing of computing power, application, data storage, network resources etc., across dynamically and geographically dispersed organizations. Most Grid environments are developed using Globus toolkit which is a UNIX/Linux based middleware to integrate computational resources over the network. The emergence of Global Grid concept provides an excellent opportunity for Grid based e-Science applications to use high performance super computing environments. Thus windows based enterprise grid environments can't be neglected in the development of Global Grids. This study discusses the basics of enterprise grids and the implementation of enterprise computational grids using Alchemi Tool Kit. This review study is organized into three parts. They are (i Introduction of Grid Technologies, (ii Design Concepts of Enterprise Grids and (iii Implementation of Computational Grid Services.

  16. Transatlantic tussles in the fission race

    International Nuclear Information System (INIS)

    Atom-smashing was as popular as barrel-smashing in the 1930s. Ernest Rutherford, who many believed was a force of nature, inspired experimental physicists to probe the atomic nucleus, which he had discovered with brute force. His early discoveries all employed the simple sources that nature offered the would-be students of alpha and beta rays. However, his transmutation of the nitrogen nucleus at the end of the First World War persuaded him that nature needed help from man if the nucleus was to yield its secrets. Rutherford was well aware of the allure of what he called the 'newer alchemy' even if he failed to share contemporary visions of nuclear energy and the bombs that might harness it. And when he summoned kindred spirits to the task, they did come, even from the deepest recesses of America. Per Dahl's book chronicles three of the principal groups of atom-smashers who answered Rutherford's call. They were: Ernest Lawrence and his Radiation Laboratory at Berkeley; John Cockcroft and Ernest Walton at the Cavendish Laboratory in Cambridge; and Merle Tuve at the Department of Terrestrial Magnetism (DTM) at the Carnegie Institution of Washington. (U.K.)

  17. Synthetic Biology: Applications in the Food Sector.

    Science.gov (United States)

    Tyagi, Ashish; Kumar, Ashwani; Aparna, S V; Mallappa, Rashmi H; Grover, Sunita; Batish, Virender Kumar

    2016-08-17

    Synthetic biology also termed as "genomic alchemy" represents a powerful area of science that is based on the convergence of biological sciences with systems engineering. It has been fittingly described as "moving from reading the genetic code to writing it" as it focuses on building, modeling, designing and fabricating novel biological systems using customized gene components that result in artificially created genetic circuitry. The scientifically compelling idea of the technological manipulation of life has been advocated since long time. Realization of this idea has gained momentum with development of high speed automation and the falling cost of gene sequencing and synthesis following the completion of the human genome project. Synthetic biology will certainly be instrumental in shaping the development of varying areas ranging from biomedicine, biopharmaceuticals, chemical production, food and dairy quality monitoring, packaging, and storage of food and dairy products, bioremediation and bioenergy production, etc. However, potential dangers of using synthetic life forms have to be acknowledged and adoption of policies by the scientific community to ensure safe practice while making important advancements in the ever expanding field of synthetic biology is to be fully supported and implemented. PMID:25365334

  18. Surface and Thin Film Analysis during Metal Organic Vapour Phase Epitaxial Growth

    International Nuclear Information System (INIS)

    In-situ analysis of epitaxial growth is the essential ingredient in order to understand the growth process, to optimize growth and last but not least to monitor or even control the epitaxial growth on a microscopic scale. In MBE (molecular beam epitaxy) in-situ analysis tools existed right from the beginning because this technique developed from Surface Science technology with all its electron based analysis tools (LEED, RHEED, PES etc). Vapour Phase Epitaxy, in contrast, remained for a long time in an empirical stage ('alchemy') because only post growth characterisations like photoluminescence, Hall effect and electrical conductivity were available. Within the last two decades, however, optical techniques were developed which provide similar capabilities as in MBE for Vapour Phase growth. I will discuss in this paper the potential of Reflectance Anisotropy Spectroscopy (RAS) and Spectroscopic Ellipsometry (SE) for the growth of thin epitaxial semiconductor layers with zincblende (GaAs etc) and wurtzite structure (GaN etc). Other techniques and materials will be also mentioned

  19. The site location of Zr atoms dissolved in TiAl

    International Nuclear Information System (INIS)

    The intermetallic compound TiAl is being considered for high temperature applications, but its adaption is hindered by its brittleness. There has been considerable research towards understanding this embrittlement, and especially towards improving the ductility by alloying while maintaining strength. In TiAl, the Ti and Al atoms lie on alternate (001) and (110) planes of a face-centered tetragonal lattice. (However, the structure is slightly distorted to tetragonal, with c/a = 1.02.) Thus, depending on the incident beam direction, the electron intensity will be concentrated at either the Ti or Al planes, and hence x-ray emission from one element will be enhanced relative to the other. This paper reports that by comparing the ratio of the characteristic x-ray intensity of a ternary element to that of Al and Ti, the concentration of the ternary element on the Al and Ti planes can be deduced. The method, which is used to locate the Zr atoms in the TiAl alloy studied, is ALCHEMI (Atom Locations by Channelling Enhanced Microanalysis). In this method, the characteristic x-ray intensity is compared for the electron diffraction conditions of S > 0 and S < 0

  20. Reflection high resolution analytical electron microscopy: a technique for studying crystal surfaces

    International Nuclear Information System (INIS)

    Reflection electron microscopy (REM), reflection high energy electron diffraction (RHEED), reflection electron energy-loss spectroscopy (REELS), and energy dispersion x-ray spectroscopy (EDX) have been comprehensively used as a technique, termed reflection high resolution analytical electron microscopy (RHRAEM), for studying the structures of the bulk crystal GaAs (110) surfaces by transmission electron microscopy (TEM). The simultaneous observations of surface topography imaging, the surface diffraction mechanism with RHEED, surface atomic inner-shell excitations with REELS, and surface chemical compositions with EDX provide a systematic description of the atomic structure and chemical structure of the surface. The surface channelling effect has been observed in GaAs (110) with REELS, which may provide a basis for localizing surface foreign atoms with ALCHEMI. The theoretically predicted surface-resonance wave has been observed directly in the RHEED pattern; the surface-captured Bragg reflection wave have been identified. It is shown that surface chemical compositions can be determined by analyzing the EDX spectra obtained in the REM case. Finally, the surface monolayer resonance characteristic of the RHRAEM has been confirmed by calculations with dynamical RHEED theory

  1. Canada's toxic tar sands : the most destructive project on earth

    Energy Technology Data Exchange (ETDEWEB)

    Hatch, C.; Price, M. [Environmental Defence, Toronto, ON (Canada)

    2008-02-15

    This document addressed the environmental problems associated with tar sands development in Alberta, with particular reference to toxicity problems associated with global warming and the impending destruction of the boreal forest. The authors cautioned that the tar sand projects are highly destructive, leaving downstream toxics equivalent to that of a massive slow motion oil spill that has the potential to poison people. Negligent oversights by the government regarding the impact of tar sands development were also discussed, with reference to toxics on site; toxics downwind; and toxics down the pipe. The report also provided information on the future of tar sands development and global warming in Canada. It included a discussion of reverse alchemy; Canada's failed climate politics; a tar sands tax; and taking responsibility. Last, the report addressed toxic enforcement, including the Fisheries Act; Canadian Environmental Protection Act; Canadian Environmental Assessment Act; and Alberta law. It was concluded that while it is a stretch to believe the tar sands can truly be sustainable, there is a great deal that can be done to clean it up. The authors recommended that new tar sands approvals should wait until certain reform elements are implemented, such as passing a real carbon cap; using dry tailings; requiring wildlife offsets; cleaning up refineries and upgraders; ensuring Aboriginal control and benefit; and having regulation and independent monitoring. 104 refs., 6 figs.

  2. The ordering scheme in Nb aluminides with the B2 crystal structure

    International Nuclear Information System (INIS)

    Recently, a series of Nb aluminides containing various amounts of Ti and possessing the B2 crystal structure have been developed. Three examples of these intermetallic compounds have compositions given by Nb-15Al-xTi, where x = 10, 25 and 40 (all compositions in atomic % unless otherwise stated). The three compounds all exhibit excellent specific strengths, but have rather different values of tensile ductility. Among a number of possible factors that are being investigated is the state of ordering in the compounds. In this paper, a new approach is applied to define a general ordering state of the B2 structure in a ternary alloy. This new concept, the Ordering Tie Line (OTL), is used to describe this ordering state, from which the site occupancies or atomic configurations of the B2 alloys can be derived. Experimentally, it has also been shown that the OTL can be determined by the ALCHEMI technique. The ordering states of these three B2 alloys, as represented by the OTL's, have been determined, and these are discussed below. As the OTL is a new concept, the notion and means of deriving an OTL are first described briefly. Further details are available in reference

  3. Ordered phase formation and diffusion composition path in Cu3Au/Pd couple

    International Nuclear Information System (INIS)

    EDX-TEM technique, IKL-ALCHEMI and Monte Carlo simulation were employed to reveal the relation between diffusion composition path and the ordered structures in Cu3Au/Pd diffusion couple annealed at 573 K. A Cu3Au layer including Pd, a CuAu layer including Pd, a CuPd layer and a Pd layer including Cu existed in sequence between Cu3Au and Pd. The Au concentration increased by up-hill diffusion from the Cu3Au layer to the CuAu layer, whereas Au scarcely diffused from the CuAu into the CuPd layer. The diffusion composition path deviated from the Cu3Au-Pd line in the Cu-Au-Pd Gibbs triangle and exhibited an 'S-shaped' curve through the CuAu and CuPd existence regions. The atomic configurations in the L10-type phase were highly ordered and consistent with the equilibrium state. In the Monte Carlo simulation, diffusion couples were virtually produced. The diffusion composition paths, Fourier power spectra and Warren-Cowley parameters were estimated in this way. The strong ordering interactions of the Cu-Au pair and Cu-Pd pair in the first nearest neighbor and the high activation barrier for migration of Au reproduced experimental results

  4. Transatlantic tussles in the fission race

    Energy Technology Data Exchange (ETDEWEB)

    Seidel, Robert [University of Minnesota, MN (United States)]. E-mail: rws@tc.umn.edu

    2003-01-01

    Atom-smashing was as popular as barrel-smashing in the 1930s. Ernest Rutherford, who many believed was a force of nature, inspired experimental physicists to probe the atomic nucleus, which he had discovered with brute force. His early discoveries all employed the simple sources that nature offered the would-be students of alpha and beta rays. However, his transmutation of the nitrogen nucleus at the end of the First World War persuaded him that nature needed help from man if the nucleus was to yield its secrets. Rutherford was well aware of the allure of what he called the 'newer alchemy' even if he failed to share contemporary visions of nuclear energy and the bombs that might harness it. And when he summoned kindred spirits to the task, they did come, even from the deepest recesses of America. Per Dahl's book chronicles three of the principal groups of atom-smashers who answered Rutherford's call. They were: Ernest Lawrence and his Radiation Laboratory at Berkeley; John Cockcroft and Ernest Walton at the Cavendish Laboratory in Cambridge; and Merle Tuve at the Department of Terrestrial Magnetism (DTM) at the Carnegie Institution of Washington. (U.K.)

  5. Ordering and site occupancy of D03 ordered Fe3Al-5 at%Cr evaluated by means of atom probe tomography

    International Nuclear Information System (INIS)

    Addition of ternary elements to the D03 ordered Fe3Al intermetallic phase is a general approach to optimise its mechanical properties. To understand the physical influences of such additions the determination of the probability of site occupancies of these additions on the lattice site and ordering parameters is of high interest. Some common experimental techniques such as X-ray diffraction or Atom Location by Channelling Enhanced Microanalysis (ALCHEMI) are usually applied to explore this interplay. Unfortunately, certain published results are partly inconsistent, imprecise or even contradictory. In this study, these aspects are evaluated systematically by atom probe tomography (APT) and a special data analysis method. Additionally, to account for possible field evaporation effects that can falsify the estimation of site occupancy and induce misinterpretations, APT evaporation sequences were also simulated. As a result, chromium occupies most frequently the next nearest neighbour sites of Al atoms and local ordering parameters could be achieved. -- Research highlights: → APT measurements of Fe3Al-Cr are systematically analysed to study ordering. → APT measurements are simulated using EAM to calculate binding energies. → Cr occupies next nearest neighbour sites of aluminium with at least 83% ordering. → Aluminium ordering is at least 92%

  6. Neutron irradiation effect on site distribution of cations in non-stoichiometric magnesium aluminate spinel

    International Nuclear Information System (INIS)

    Neutron irradiation effects on cation distribution in non-stoichiometric Mg-Al spinel were examined by ALCHEMI (Atom Location by Channeling Enhanced Microanalysis) method. Parameter n, or non-stoichiometry of MgO . nAl2O3 of the specimens, were n = 1.00, 1.01, 1.10, 1.48. These specimens were neutron-irradiated up to a fluence of 2.3 x 1024 n/m2 (E > 0.1 MeV) at 500-530 deg. C in JMTR. Some specimens contracted by the irradiation and the arrangement of cations became more disorder. The other specimens showed very small swelling by the irradiation and the cation distribution became slightly ordered. The cation distribution of the contracted specimen returned stepwise to the pre-irradiated condition after the annealing at 700 deg. C. The cation distribution of the slightly swollen specimens did not change after the annealing up to 700 deg. C. Cation distribution in the T-site was more sensitively influenced by the irradiation

  7. Transmission electron microscopy studies of atomic ordering and crystal size determination on the nanometer scale

    International Nuclear Information System (INIS)

    Atomic ordering and site determination have been studied em areas of progressively smaller scale. In paper I we studied how AI and Si arc ordered in a π-AlFeMgSi matrix. Single crystal investigations were carried out using CBED for site-symmetry and refinement of atomic positions. Electron channelling was used to determine how Al and Si were arranged on atomic sites within the crystal. In paper III and IV, we studied MnO2 crystallites. The crystallites were of' nanometer size and therefore, in contrast to paper I and II, single crystal analysis could not be carried out. Instead, SAD was used to determine the arrangement of Mn atoms on the octahedral sites between oxygen hcp layers and also used to obtain information on how crystal and unit cell sizes vary within the film. The small size of nanocrystals generally limits the use of single crystal analysis techniques. However, electron channelling (or ALCHEMI) can be used to study the site arrangement of atoms in nanometer sized thin films if the film and substrate are coherent and if studied in plane view. This is explored m paper V. (Author)

  8. High temperature deformation and ternary alloying of NbCr2 Laves intermetallics

    International Nuclear Information System (INIS)

    A study has been conducted to examine the effect of ternary alloying elements on high temperature deformation of the C15 NbCr2 based intermetallics in Nb-Cr-X (X = V, Mo and W) alloy systems, which have attractive properties as high temperature structural materials. The high temperature deformation of the C15 NbCr2 intermetallics can be improved by two alloying methods. One method is based on geometrical consideration for site occupation and atomic size factor of component elements and additive elements in the single phase C15 lattice; addition of Mo and V can promote dislocation movement without introducing significant hardening. The other method is based on microstructural modification through ternary alloying; moderate addition of these elements results in a variety of duplex microstructure consisting of the C15 phase and bcc solid solution without forming any intermediate phases, and can enhance the high temperature deformability. Particularly, alloys with duplex microstructure equilibrating with Cr-rich bcc solid solution is shown to exhibit superior deformability. Also, lattice property of the additive atoms in the C15 structure and phase relation between the C15 structure and the bcc solid solution are investigated by OM, XRD, TEM and ALCHEMI observations and then discussed in association with observed mechanical behavior

  9. Canada's toxic tar sands : the most destructive project on earth

    International Nuclear Information System (INIS)

    This document addressed the environmental problems associated with tar sands development in Alberta, with particular reference to toxicity problems associated with global warming and the impending destruction of the boreal forest. The authors cautioned that the tar sand projects are highly destructive, leaving downstream toxics equivalent to that of a massive slow motion oil spill that has the potential to poison people. Negligent oversights by the government regarding the impact of tar sands development were also discussed, with reference to toxics on site; toxics downwind; and toxics down the pipe. The report also provided information on the future of tar sands development and global warming in Canada. It included a discussion of reverse alchemy; Canada's failed climate politics; a tar sands tax; and taking responsibility. Last, the report addressed toxic enforcement, including the Fisheries Act; Canadian Environmental Protection Act; Canadian Environmental Assessment Act; and Alberta law. It was concluded that while it is a stretch to believe the tar sands can truly be sustainable, there is a great deal that can be done to clean it up. The authors recommended that new tar sands approvals should wait until certain reform elements are implemented, such as passing a real carbon cap; using dry tailings; requiring wildlife offsets; cleaning up refineries and upgraders; ensuring Aboriginal control and benefit; and having regulation and independent monitoring. 104 refs., 6 figs

  10. Environmentally appropriate technology, part 2

    International Nuclear Information System (INIS)

    In this his second article on alternatives to thermally generated electricity, the author considers the economics of solar heating in Canada and existing or planned demonstration projects. Solar heating is at its best in February and March; it is admitted that December and January are dark months. Most solar-heated houses incorporate large heat-storage systems, but some only store heat for a day or two, and they, naturally, are cheaper. For an example of the cheaper type, a group at McGill Univ. has built four innovative houses for Indians in Quebec, with partial solar heating. For a more elaborate example, the New Alchemy Institute 'Ark' on Prince Edward Islnd includes greenhouses, fishponds and windmills. The author calculates that at 20% inflation of oil, gas and electricity prices, the annual cost of a house with 75% solar and 25% electric heating will rise from about $940 to about $5300 in 20 years, whereas that of oil or gas heating will rise from $600 to about $15,000. (N.D.H.)

  11. Microstructure of A γ-α2-β Ti-Al alloy containing iron and vanadium

    International Nuclear Information System (INIS)

    Ordered β-phase (B2 CsCl structure) has been identified in a Ti-45.5 at.% Al-1.6 at.% Fe-1.1 at.% V-0.7 at.% B alloy being developed for high temperature applications. Selected area electron diffraction has been used to identify the orientation relationships and interface planes of the β-phase with the bulk γ-TiAl and α2-Ti3Al phases. Energy dispersive X-ray spectroscopy indicates that the β-phase has approximately the same Ti/Al ratio as the α2-Ti3Al phase, and is stabilized within the microstructure by Fe and V. Channeling enhanced microanalysis studies (ALCHEMI) show that the Fe and V both occupy the same sublattice as the Al atoms in the cubic β-phase structure, and that Fe occupies the Al sites in the γ-phase. Fe and V are concentrated in the β-phase, which effectively getters these dopants from the γ and α2 phases. Titanium ferride precipitates, probably FeTi, have been observed within the β-phase

  12. Newton's apple Isaac Newton and the English scientific renaissance

    CERN Document Server

    Aughton, Peter

    2003-01-01

    In the aftermath of the English Civil War, the Restoration overturned England's medieval outlook and a new way of looking at the world allowed the genius of Isaac Newton (b. 1642) and his contemporaries to flourish. Newton had a long and eventful life apart from his scentific discoveries. He was born at the beginnings of the Civil War, his studies were disrupted by the twin disasters of the Great Plague and the Fire of London; a brilliant and enigmatic genius, Newton dabbled in alchemy, wrote over a million words on the Bible, quarrelled with his contemporaries and spent his last years as Master of the Royal Mint as well as President of the Royal Society. This book sets Newton's life and work against this dramatic intellectual rebirth; among his friends and contemporaries were Samuel Pepys, the colourful diarist, John Evelyn, the eccentric antiquarian, the astronomers Edmund Halley and John Flamsteed, and Christopher Wren, the greatest architect of his age. They were all instrumental in the founding of the Ro...

  13. Transatlantic tussles in the fission race

    CERN Document Server

    Seidel, R

    2003-01-01

    Atom-smashing was as popular as barrel-smashing in the 1930s. Ernest Rutherford, who many believed was a force of nature, inspired experimental physicists to probe the atomic nucleus, which he had discovered with brute force. His early discoveries all employed the simple sources that nature offered the would-be students of alpha and beta rays. However, his transmutation of the nitrogen nucleus at the end of the First World War persuaded him that nature needed help from man if the nucleus was to yield its secrets. Rutherford was well aware of the allure of what he called the 'newer alchemy' even if he failed to share contemporary visions of nuclear energy and the bombs that might harness it. And when he summoned kindred spirits to the task, they did come, even from the deepest recesses of America. Per Dahl's book chronicles three of the principal groups of atom-smashers who answered Rutherford's call. They were: Ernest Lawrence and his Radiation Laboratory at Berkeley; John Cockcroft and Ernest Walton at the C...

  14. John Napier life, logarithms, and legacy

    CERN Document Server

    Havil, Julian

    2014-01-01

    John Napier (1550–1617) is celebrated today as the man who invented logarithms—an enormous intellectual achievement that would soon lead to the development of their mechanical equivalent in the slide rule: the two would serve humanity as the principal means of calculation until the mid-1970s. Yet, despite Napier’s pioneering efforts, his life and work have not attracted detailed modern scrutiny. John Napier is the first contemporary biography to take an in-depth look at the multiple facets of Napier’s story: his privileged position as the eighth Laird of Merchiston and the son of influential Scottish landowners; his reputation as a magician who dabbled in alchemy; his interest in agriculture; his involvement with a notorious outlaw; his staunch anti-Catholic beliefs; his interactions with such peers as Henry Briggs, Johannes Kepler, and Tycho Brahe; and, most notably, his estimable mathematical legacy. Julian Havil explores Napier’s original development of logarithms, the motivations for his approa...

  15. Jejak-jejak Imperial dalam Beragam Nasionalisme Asia Tenggara

    Directory of Open Access Journals (Sweden)

    Ihsan Ali-Fauzi

    2013-12-01

    Full Text Available Anthony Reid, Imperial Alchemy: Nationalism and Political Identity in Southeast Asia (New York: Cambridge University Press. 2010, xiii + 248 pages.Reid has long been widely known as a senior historian with a specialty in the history of Aceh, Sumatra, and the Indonesian revolution. Recently, he has begun to write about the history of Southeast Asia. Inspired by French historian Fernand Braudel, this work presents what Reid calls a “total history” of this region. In this approach wars, royal dynasties, and foreign traders are not prioritized over the diets, health, and pastimes of ordinary people. Through this work, Reid has begun to strengthen the study of Southeast Asia. As one of the pioneers and masters of the study of Asia and the Pacific, particularly Southeast Asia, Reid is uniquely positioned to offer new insights about this region’s history. In this book, Reid offers a new understanding of the historical data collected on the link between ethnic identity, nationalism, and history of Southeast Asia.Copyright (c 2014 by SDI. All right reserved.DOI: 10.15408/sdi.v20i3.516

  16. Chimie et mécanisme dans la nouvelle Académie royale des sciences : les débats entre Louis Lémery et Etienne-François Geoffroy

    Directory of Open Access Journals (Sweden)

    Bernard Joly

    2008-03-01

    Full Text Available Au début du XVIIIe siècle, une querelle éclate entre deux chimistes français à propos de la fabrication artificielle du fer. C’est en fait un conflit entre une interprétation mécaniste des processus chimiques et une approche plus traditionnelle, soupçonnée d’emprunter ses thèses à l’alchimie, mais qui sera pourtant à l’origine de la table des affinités qui sera adoptée par tous les chimistes jusqu’au début du XIXe siècle.In the early eighteenth century a quarrel came out between two French chemists concerning artificial making of iron. It was in fact a conflict between a mechanist interpretation of chemical process and a more traditional approach, which was suspected of having taken his thesis from alchemy. But nevertheless, this approach will lead to affinity table which was accepted by all the chemists until the early nineteenth century.

  17. The Scientific Revolution--The Kidney and Nephrology in and about the Seventeenth Century (Part 1).

    Science.gov (United States)

    Eknoyan, Garabed

    2015-01-01

    In the history of the evolution of the medical sciences, it is in the 17th century that the conscious, deliberate, and systematic study of the workings of the human body began. It was a product of the radical changing attitudes of this insurgent century when mathematical reasoning and mechanistic philosophy replaced the teleological outlook of earlier times. It was then that meticulous observation, reproducible quantification, experimental validation, and mathematical exactitude in the quest for truths launched the Scientific Revolution. The effect on medicine was a transformative change from a descriptive to an explanatory body of knowledge during the course of which rigorous anatomical dissections were used for the mechanical explanation of organ function, when morbid changes observed at postmortem began to be related to clinical features of disease, and when the secretive analytical methods of alchemy began to be refined for the study of chemical changes in living matter. Essentially what began with meticulous observations of anatomical features begat physiology and laid the foundations of pathology and chemistry. As a result, studies of organ structure, function, and changes in disease in general, and of the kidney in particular, were clarified and progressed at a rate never achieved theretofore. PMID:25560324

  18. Mining Tacitus: secrets of empire, nature and art in the reason of state.

    Science.gov (United States)

    Keller, Vera

    2012-06-01

    A new political practice, the 'reason of state', informed the ends and practices of natural study in the late sixteenth century. Informed by the study of the Roman historian Tacitus, political writers gathered 'secrets of empire' from both history and travel. Following the economic reorientation of 'reason of state' by Giovanni Botero (1544-1617), such secrets came to include bodies of useful particulars concerning nature and art collected by an expanding personnel of intelligencers. A comparison between various writers describing wide-scale collections, such as Botero, Francis Bacon (1561-1626), Jakob Bornitz (1560-1625) and Matthias Bernegger (1582-1640), reveals that seventeenth-century natural intelligencers across Europe not only were analogous to political intelligencers, but also were sometimes one and the same. Those seeking political prudence cast themselves as miners, prying precious particulars from the recesses of history, experience and disparate disciplines, including mathematics, alchemy and natural philosophy. The seventeenth-century practice of combining searches for secrets of empire, nature and art contests a frequent historiographical divide between empirical science and Tacitism or reason of state. It also points to the ways political cunning shaped the management of information for both politics and the study of nature and art. PMID:23050367

  19. Some reflections on the influence of Chinese thought on Jung and his psychological theory.

    Science.gov (United States)

    Stein, Murray

    2005-04-01

    Jung claimed that Richard Wilhelm, whose masterful translations of Chinese wisdom literature into a European language (German) and thence into Western consciousness have brought Chinese modes of thinking to so many, was one of the most important influences on his own life and work. The contacts between the two men, which took place from the early 1920's until Wilhelm's death in 1930, were few but intense and for Jung decisive in several ways. Wilhelm's translations of the I Ching and The Secret of the Golden Flower opened new avenues for Jung that had far-reaching consequences on his research and writing after 1930. The latter opened the door to the study of alchemy as a key to the archetypal process of individuation as rooted in the collective unconscious. 'Synchronicity' is a term that grew out of his contact with Chinese thought, in particular with the I Ching. From his contact with Chinese thought, additionally, he received confirmation of the view, independently arrived at, that adult psychological development is not linear but rather circular and spiral-like. The letters between Jung and Wilhelm illuminate the great importance Jung ascribed to Wilhelm's contribution toward bridging East and West and the potential value of Chinese philosophy for psychotherapy. PMID:15817043

  20. Neutron irradiation effect on site distribution of cations in non-stoichiometric magnesium aluminate spinel

    Energy Technology Data Exchange (ETDEWEB)

    Sawabe, Takashi [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550 (Japan)], E-mail: 06d19012@nr.titech.ac.jp; Yano, Toyohiko [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550 (Japan)

    2008-02-15

    Neutron irradiation effects on cation distribution in non-stoichiometric Mg-Al spinel were examined by ALCHEMI (Atom Location by Channeling Enhanced Microanalysis) method. Parameter n, or non-stoichiometry of MgO . nAl{sub 2}O{sub 3} of the specimens, were n = 1.00, 1.01, 1.10, 1.48. These specimens were neutron-irradiated up to a fluence of 2.3 x 10{sup 24} n/m{sup 2} (E > 0.1 MeV) at 500-530 deg. C in JMTR. Some specimens contracted by the irradiation and the arrangement of cations became more disorder. The other specimens showed very small swelling by the irradiation and the cation distribution became slightly ordered. The cation distribution of the contracted specimen returned stepwise to the pre-irradiated condition after the annealing at 700 deg. C. The cation distribution of the slightly swollen specimens did not change after the annealing up to 700 deg. C. Cation distribution in the T-site was more sensitively influenced by the irradiation.

  1. Neutron irradiation effect on site distribution of cations in non-stoichiometric magnesium aluminate spinel

    Science.gov (United States)

    Sawabe, Takashi; Yano, Toyohiko

    2008-02-01

    Neutron irradiation effects on cation distribution in non-stoichiometric Mg-Al spinel were examined by ALCHEMI (Atom Location by Channeling Enhanced Microanalysis) method. Parameter n, or non-stoichiometry of MgO · nAl 2O 3 of the specimens, were n = 1.00, 1.01, 1.10, 1.48. These specimens were neutron-irradiated up to a fluence of 2.3 × 10 24 n/m 2 ( E > 0.1 MeV) at 500-530 °C in JMTR. Some specimens contracted by the irradiation and the arrangement of cations became more disorder. The other specimens showed very small swelling by the irradiation and the cation distribution became slightly ordered. The cation distribution of the contracted specimen returned stepwise to the pre-irradiated condition after the annealing at 700 °C. The cation distribution of the slightly swollen specimens did not change after the annealing up to 700 °C. Cation distribution in the T-site was more sensitively influenced by the irradiation.

  2. Teaching evolution: challenging religious preconceptions.

    Science.gov (United States)

    Lovely, Eric C; Kondrick, Linda C

    2008-08-01

    Teaching college students about the nature of science should not be a controversial exercise. College students are expected to distinguish between astronomy and astrology, chemistry and alchemy, evolution and creationism. In practice, however, the conflict between creationism and the nature of science may create controversy in the classroom, even walkouts, when the subject of evolution is raised. The authors have grappled with the meaning of such behaviors. They surveyed 538 students in a public, liberal arts college. Pre/post course surveys were analyzed to track changes in student responses to questions that were either consistent or inconsistent with the Theory of Evolution after a semester of instruction in a college biology or zoology course in which evolution was taught. Many students who were initially undecided about issues regarding evolution had shifted in their viewpoints by the end of the course. It was found that more education about the evidence for and the mechanics of evolutionary processes did not necessarily move students toward a scientific viewpoint. The authors also discovered a "wedge" effect among students who were undecided about questions pertaining to human ancestry at the beginning of the course. About half of these students shifted to a scientific viewpoint at the end of the course; the other half shifted toward agreement with statements consistent with creationism. PMID:21669781

  3. All That Glitters Is Not Gold

    CERN Multimedia

    2001-01-01

    The surface treatment lab team. From left to right, J. Carosone, M. Malabaila, J-P. Malivert (front row), M. Thiebert, and A. Lasserre (back row). Apiece of stainless steel equipment, destined for the LHC, was delivered to building 102 last Friday morning. This past Monday the equipment emerged from the same building in the afternoon, looking very much the same as it did when it arrived... with one small difference. The equipment was no longer steel, but gold. This may sound like medieval alchemy, but not all is as it appears. In fact there is no sorcery involved, just lots of careful chemical engineering. No wizards either, but rather a talented team of individuals... the CERN surface treatment lab group. Copper, silver, and gold are all incredibly important to particle physics projects because of their ability to conduct electricity with very low resistance. Unfortunately, these metals are also expensive and cannot be used frequently in large quantities. So instead of building equipment out of gold, equi...

  4. ALS diagnostic criteria, El Escorial, and Philip II of Spain: a historical perspective.

    Science.gov (United States)

    Belsh, J M

    1999-12-01

    El Escorial, a magnificent palace-monastery in central Spain, was the setting in 1990 for a meeting of ALS experts who developed a consensus document called the El Escorial ALS Diagnostic Criteria. El Escorial was originally conceived by the Spanish Habsburg monarch, Philip II (1527-1598), as an elaborate burial place for his parents, Emperor Charles V and Isabella. It soon became a symbol of the Spanish empire and Philip's Catholic leadership of the Counter-Reformation. El Escorial included a monastery, palace, basilica, mausoleum, seminary, library, and hospital. Nothing was spared by Philip in obtaining the finest examples of religious art, architecture, music, and books. Philip, as absolute monarch, inherited a vast empire which stretched over Europe, Asia, North Africa, and the New World. His style of personal micro-management and poor economic planning hampered his ability to manage both national and foreign affairs. Philip had a special interest in medicine, including royal hospitals, improved government standards for physicians, medicinal plants, and the health benefits of alchemy and sacred relics. El Escorial's grand scale has generated both illustrious praise and critical condemnation over the last four centuries. Its place in Spanish and world history is assured. PMID:12365069

  5. Wizards and scientists: the pharmacologic experience in the Middle Ages.

    Science.gov (United States)

    Rossi, F; Mangrella, M; Loffreda, A; Lampa, E

    1994-01-01

    During the Dark ages, Greco-Roman science survived in the eastern Roman Empire and the most important advances in pharmacology and pharmacy were made in Byzantium. As the Arab empires spread in the 7th and 8th centuries, they incorporated earlier learning, and the most important contribution of Arabic medical writers was probably the introduction of formularies to aid in the preparation of medicines. In turn, the later spread of Arabic knowledge to the West introduced little-known plants and fostered an interest in collecting and cultivating them, and also introduced the palatable dose forms preferred by the Arabic doctors. In the West, however, the Christian Church taught a doctrine of unquestioning faith, and despite the centers of learning, e.g. at Salerno, most ordinary people depended on the healing power of faith, religious relics and traditional folk medicine. Hydrology was also well developed in the Middle Ages. The formularia that survive describe many indigenous plants, but with few illustrations. Their gathering and preparation is generally guided by magic ceremonies and ritual, and plants often took their properties from their habitat, e.g. the wayside plantain was thought good for tired or wounded feet. Concepts of therapeutic plants were also influenced by alchemy and were linked to related metals and planets. PMID:7847474

  6. A green economy?

    Directory of Open Access Journals (Sweden)

    Petrus Simons

    2014-08-01

    Full Text Available Economic growth has become a fetish, as it is believed to yield many benefits to society. It has its origins in the Enlightenment ideal of progress through science, technology and a free market economy. J.W. Goethe anticipated the problems of such progress in his poem Faust, especially its second part. Binswanger interprets Goethe’s view on the modern economy as a form of alchemy, an attempt to master time through the invention of monetary capital. Keynes’s views on progress and liquidity are compatible with this analysis. The problems, evoked by the uncritical application of scientific technology so as to increase material welfare, have given rise to a dialectic between business seeking growth and those concerned about its effects, especially on ecology. Sustainable development is an outcome of this dialectic, without abandoning it. Others, particularly those advocating décroissance [de-growth], reject the concepts underlying growth. The ideology underlying this is a combination of technicism and economism. A spiritual revolution is called for to break the hold of this ideology on society, with a change from the metaphor of the world as a machine to that of a garden-city. It is suggested that working groups should analyse the various proposals for change from the perspective of the garden-city metaphor.

  7. Ge Hong. Famous Daoist Thinker & Practical Martial Artist

    Directory of Open Access Journals (Sweden)

    Stanley E. Henning

    2012-07-01

    Full Text Available Ge Hong (284-363 CE was an important intellectual figure of his time. He is known primarily for his interest in Daoist pursuits, including alchemy, as discussed in his writings titled One Who Embraces Simplicity (Baopuzi. However, the fact that he was also a military officer, who had practiced several weapons styles and who provides valuable insights into Chinese martial arts practices, has generally been ignored. This short article will attempt to outline Ge Hong’s contributions to our understanding of the role of martial arts in Chinese culture and society based on his personal experience and observations. Ge Hong viewed the martial arts as practical skills related to hunting (archery and self-defense, not Daoist pursuits, and he mentions that some of these skills could even be seen in children’s play. His reference to Cao Pi (Emperor of Wei, 220-226 CE sparring with General Deng Zhan reflects the place of martial arts among leadership in the political military system of early imperial China (206 BCE-960 CE. His explanation of oral formulas (koujue is indicative of the secrecy maintained by martial artists concerning individual techniques. 

  8. [A study of the sexual art of having intercourse with several young virgins in traditional Chinese medicine].

    Science.gov (United States)

    Yan, Shanzhao

    2002-06-01

    The emergency treatments for the damage and bleeding of the vagina, and the sharp pubic pain of young virgins which were caused occurred by the sexual art, were recorded in traditional medicine books, such as the "Ji yan fang" and others. It is a fact that in ancient China some people used the sexual art of having intercourse with several young virgins at the same time in order to increase their health and keep perpetual youth and longevity. The famous traditional general-medical book, "qian jin yao fang" recommended that method to rich persons too. It is supposed that the beginning of the sexual art of having intercourse with several young virgins traces back to the times of Emperor Hanwu , but it seems to have disappeared from the historical stage in the Song period. On the other hand, the criticisms from the traditional medicine books and the secret languages of internal alchemy used for the Taoist sacred books show that the sexual art of having intercourse with several young virgins was still going on behind the scene in the Ming and Qing periods. Even if we consider the historical changes of ethics and mortality, we now cannot but criticize this behavior of abusing juveniles for the sexual art. PMID:12398073

  9. Women in Chemistry: Their Changing Roles from Alchemical Times to the Mid-Twentieth Century (by Marelene Rayner-Canham and Geoffrey Rayner-Canham)

    Science.gov (United States)

    Caserio, Marjorie C.

    1999-07-01

    Women who made significant contributions in the chemical sciences prior to the 20th century do not come readily to mind. Yet, as this book relates so engagingly, women have been influential in chemistry since the earliest period of recorded history. However, Women in Chemistry is more than a dated collection of biographical sketches of notable women scientists. The book highlights the main periods of history when it was possible for women to have some measure of success in the chemical sciences and focuses on their changing roles from alchemical times to the mid-20th century. By glimpsing into the life and work of individuals in the context of the time in which they lived, the authors impart a credible and moving image of the restraints imposed on aspiring women scientists and the obstacles that confronted them-making the extent of their contributions all the more remarkable. Each chapter has a theme into which are woven selected biographical sketches. Chapter 1 offers a whirlwind tour of the centuries from Babylonian times (1200 B.C.E.) through the Middle Ages and into the 17th century, giving perspective on how the various civilizations did (or did not) consider women capable of intellectual achievement or permit such of them. This short but powerful chapter invokes appreciation for the major contributions made by women in the face of enormous obstacles of prejudice, superstition (witchcraft), monastic reprisals, pseudoscience (alchemy), and denial of education. The women featured include Maria Hebraea (around 300 C.E.famed for the water bath, bain Marie), Hypatia (mathematician, 400 C.E.), Western alchemists (de Gourney and Meudrac), and Chinese alchemists. By the 18th century, science had progressed and alchemy was at an end. Though enlightened scientifically, western society still considered women's intellect inferior. But, as Chapter 2 relates, the literary salons of France nurtured intellectual discussion in society women, and it was in this context that

  10. Hydrogen isotope composition of leaf wax n-alkanes in glaucous and non-glaucous varieties of wheat (Triticum spp.)

    Science.gov (United States)

    Pedentchouk, Nikolai; Eley, Yvette; Frizell-Armitage, Amelia; Uauy, Cristobal

    2015-04-01

    The use of the 2H/1H composition of terrestrial plants in climate and ecology studies depends on fundamental understanding of the processes within the plant that control fractionation of these two isotopes. Little is currently known about the extent of 2H/1H fractionation at different steps of biosynthesis, after the initial H uptake following leaf water photolysis. Knowing this effect is particularly important when seeking to interpret the 2H/1H composition of leaf wax biomarkers from plants that differ in the amount and type of individual compound classes in their leaf waxes. The purpose of this study was to investigate the link between the quantity and distribution of n-alkyl lipids in leaf waxes and their isotopic composition. We used a genetic approach to suppress glaucousness in 2 varieties of wheat (Alchemy and Malacca), which resulted in glaucous and non-glaucous phenotypes of both varieties. Both phenotypes were then grown outdoors under identical environmental conditions in central Norfolk, UK. At the end of the growing season, the plants were sampled for soil water, leaf water, and leaf wax isotopic measurements. Comparison of the leaf wax composition of the non-glaucous and glaucous phenotypes revealed that the non-glaucous varieties were characterised by the absence of diketones and a greater concentration of n-alkanes and primary alcohols.. Our results showed very small differences between glaucous and non-glaucous varieties with regard to soil (mean values, lipids from these plants will provide further details regarding the role of biosynthesis in controlling 2H/1H fractionation within leaf waxes.

  11. Archetypal-Imaging and Mirror-Gazing

    Science.gov (United States)

    Caputo, Giovanni B.

    2013-01-01

    Mirrors have been studied by cognitive psychology in order to understand self-recognition, self-identity, and self-consciousness. Moreover, the relevance of mirrors in spirituality, magic and arts may also suggest that mirrors can be symbols of unconscious contents. Carl G. Jung investigated mirrors in relation to the unconscious, particularly in Psychology and Alchemy. However, the relationship between the conscious behavior in front of a mirror and the unconscious meaning of mirrors has not been clarified. Recently, empirical research found that gazing at one’s own face in the mirror for a few minutes, at a low illumination level, produces the perception of bodily dysmorphic illusions of strange-faces. Healthy observers usually describe huge distortions of their own faces, monstrous beings, prototypical faces, faces of relatives and deceased, and faces of animals. In the psychiatric population, some schizophrenics show a dramatic increase of strange-face illusions. They can also describe the perception of multiple-others that fill the mirror surface surrounding their strange-face. Schizophrenics are usually convinced that strange-face illusions are truly real and identify themselves with strange-face illusions, diversely from healthy individuals who never identify with them. On the contrary, most patients with major depression do not perceive strange-face illusions, or they perceive very faint changes of their immobile faces in the mirror, like death statues. Strange-face illusions may be the psychodynamic projection of the subject’s unconscious archetypal contents into the mirror image. Therefore, strange-face illusions might provide both an ecological setting and an experimental technique for “imaging of the unconscious”. Future researches have been proposed. PMID:25379264

  12. Phase stability, deformation mechanisms, and mechanical properties of Nb-Al-Ti alloys

    International Nuclear Information System (INIS)

    The phase stability, deformation mechanisms and mechanical properties of two alloys based on Nb3Al containing additions of Ti have been studied. These two alloys, with nominal compositions (in at.%) of Nb-15Al-10Ti (alloy 1) and Nb-15Al-40Ti (alloy 2), have the B2 crystal structure in as cast form. The ALCHEMI technique has been employed to assess qualitatively the distribution of atom types over the two sublattices of the B2 compounds. It is found that Ti and Al occupy different sublattices in alloy 2. Heat-treatment of alloy 1 at 1,100 C results in the precipitation of an A15 phase in the B2 matrix. Annealing at 900 C for short time introduces an w-phase. Prolonged annealing of alloy 1 at 700 C reveals the presence of an orthorhombic phase. The same orthorhombic phase is also found to exist between 800 and 1,000 C in alloy 2. Specific orientation relationships exist between the matrix phase and precipitates. The yield strength in compression of Alloy 1 and 2 were determined at various temperatures. Alloy 1 is strong compared to superalloy IN 718 over a range of temperatures up to 950 C. Both alloys with the B2 crystal structure are deformed by one or more of the following slip systems, namely (110), (112) and (123). Dislocations with Burgers vector, b, given by b= are present in the form of dissociated superpartial pairs, each with b=1/2. The inherent ductility of both alloys is indicated by the active slip systems and illustrated by 20% elongation to failure obtained in alloy 2 under room temperature tensile test. A trend of increasing tensile yield stress with increasing antiphase domain size was found. No evidence of interaction between dislocations and antiphase boundaries has been found to account for this increase of strength

  13. Phase stability and defect structure of the C15 Laves phase Nb(Cr,V)2

    International Nuclear Information System (INIS)

    Vanadium alloyed C15 Laves phase based on NbCr2 and phase equilibria in the Nb-Cr-V system have been studied, focusing on the physical metallurgy and defect structures of the C15 phase.Based on the Nb-Cr-V phase diagram established in this work, the defect structure/mechanism in the ternary C15 Laves phase is investigated using a combination of metallography, SEM/EDS, TEM/ALCHEMI, and X-ray powder diffraction. It is found that the C15 phase field of NbCr2 is extended by V alloying up to more than 3 at.% V and V substitutes exclusively on the Cr site instead of the Nb site, although the atomic sizes of the constituent elements indicate rCr V Nb. The lattice constants of the ternary C15 phase Nb(Cr,V)2 increase linearly with increasing V content. The electronic structure and total energy of the C15 intermetallic phase NbCr2 have been calculated using the linear muffin tin orbital (LMTO) method with the atomic sphere approximation (ASA). The electronic band structure and density of electronic states were obtained. The formation and stability of the ternary C15 Laves phase Nb(Cr,V)2, the defect structure/mechanism, and the compositional dependence of the lattice constants are elucidated using a combination of geometric and electronic considerations. These results indicate that the electronic factor may also play an important role, in addition to the atomic size rule, in determining the alloying behavior and the defect structure/mechanism of C15 Laves phases based on NbCr2

  14. Preparation and characterization chemistry of nano-crystalline Ni-Cu-Zn ferrite

    Energy Technology Data Exchange (ETDEWEB)

    Hashim, Mohd, E-mail: md.hashim09@gmail.com [Department of Applied Physics, Aligarh Muslim University, Aligarh 202002 (India); Alimuddin [Department of Applied Physics, Aligarh Muslim University, Aligarh 202002 (India); Shirsath, Sagar E. [Spin Device Technology Centre, Faculty of Engineering, Shinshu University, Nagano 380-8553 (Japan); Kumar, Shalendra [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Kumar, Ravi [Centre for Material Science Engineering, National Institute of Technology, Hamirpur, HP (India); Roy, Aashis S. [Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka (India); Shah, Jyoti; Kotnala, R.K. [National Physical Laboratory (CSIR), Dr. K.S. Krishnan Road, New Delhi 110012 (India)

    2013-02-05

    Highlights: Black-Right-Pointing-Pointer Single phase Ni{sub 0.5}Cu{sub 0.25}Zn{sub 0.25}Fe{sub 2-x}In{sub x}O{sub 4} ferrites were synthesized by citrate-nitrate precursor auto combustion. Black-Right-Pointing-Pointer Magnetic properties decreased due to the substitution of In{sup 3+} ions. Black-Right-Pointing-Pointer Dielectric properties decreased with increase in frequency. Black-Right-Pointing-Pointer This composition can be used for multilayer chip inductor (MLCI) applications. - Abstract: In submitted research; nanocrystalline powders having elements Ni{sub 0.5}Cu{sub 0.25}Zn{sub 0.25}Fe{sub 2-x}In{sub x}O{sub 4} with varied amounts of indium (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were grown-up by modified citrate to nitrate alchemy. The realism of single phase cubic spinel creation of the synthesized ferrite samples was studied by the DTA-TGA, XRD, SEM, EDX, FT-IR, VSM and dielectric measurements. SEM was applied to inspect the morphological variations and EDX was used to determine the compositional mass ratios. The studies on the dielectric constant ({epsilon} Prime ), dielectric loss ({epsilon} Double-Prime ), loss tangent (tan {delta}), ac conductivity ({sigma}{sub ac}), resistive and reactive parts of the impedance analysis (Z' and Z') at room temperature were also carried out. The saturation magnetizations (Ms) were determined using the vibrating sample magnetometer (VSM). Ms. decreased with the increase In{sup 3+} doping content, as Fe{sup 3+} of 5{mu}{sub B} ions are replaced by In{sup 3+} of 0 {mu}{sub B} ions.

  15. Nuclear astrophysics: a new era

    International Nuclear Information System (INIS)

    The latest generation of radioactive-ion-beam facilities promises to shed light on the complex nuclear processes that control the evolution of stars and stellar explosions. The most fundamental question in nature is where do we come from, or, put another way, what are we made of? The late Carl Sagan poetically said that we are all made of stardust, but the origin of the elements has fascinated scientists for thousands of years. Many of the greatest medieval and renaissance scientists dabbled in alchemy, trying to create the elements that make up the cosmos, but we had to wait until the early 20th century to recognize that elements are really defined by the number of protons in the nucleus. According to our current understanding, after the big bang most of the normal or baryonic material in the universe consisted of the lightest two elements, hydrogen and helium, with only trace amounts of lithium and beryllium. All the heavier elements that occur naturally on Earth were created from this original material via a series of nuclear reactions in the cores of stars or in stellar explosions. Over the last decade, ground-based telescopes and satellite-based Observatories have opened new windows on the stars across the electromagnetic spectrum, from infrared to gamma radiation. New technology now makes it possible to observe and analyse short-lived stellar explosions. Indeed, the distribution of elements in 'planetary nebula' and in the ejecta of supernovae and novae give a direct glimpse of individual nucleosynthesis processes. In the February issue of Physics World, Michael Wiescher, Paddy Regan and Ani Aprahamian describe how sate-of-the-art facilities are set to plug many of the gaps in our understanding of nuclear astrophysics. (U.K.)

  16. Occupancy sites of constituent atoms and their effects on the martensitic transformations in some Cu-based and Ti-Ni-based ternary alloys

    International Nuclear Information System (INIS)

    Atomic configurations in β phase Cu-Al-Ni, Cu-Au-Zn and Cu-Zn-Al ternary alloys before and after martensitic transformations, and occupancy sites of third elements X in the B2 parent lattice of Ti-Ni-X ternary alloys, where X = 3d elements, Pd and Au, have been investigated by means of an electron channeling enhanced microanalysis method, called ALCHEMI. Large increases in Ms and As temperatures by several tens of K or more observed in the β phase alloys upon aging at ambient temperatures are attributed to ordering in the parent phase and to disordering in the martensite phase, respectively, both taking place between certain atoms occupying specific sites. The occupancy sites of third elements X in Ti-Ni-X alloys have been systematically examined, changing compositions in the following formulae: Ti0.5-xNi0.5Xx, Ti0.5-x/2Ni0.5-x/2Xx and Ti0.5Ni0.5-xXx, where x ≤ 0.05. While Fe, Co and Pd atoms occupy the Ni site preferentially, Sc atoms occupy the Ti site irrespective of composition, and the others the Ni and/or Ti site, depending on composition. These results for the Ti-Ni-X alloys are reasonably explained by a parameter D, which is defined by D = VTiX-VNiX/VTiNi, where Vij is pairwise interaction between i and j atoms. Decreases in Ms temperature for the B2→B19' martensitic transformation are discussed in terms of an average number of valence electrons at the specific sites in the parent lattice. (orig.)

  17. Preparation and characterization chemistry of nano-crystalline Ni–Cu–Zn ferrite

    International Nuclear Information System (INIS)

    Highlights: ► Single phase Ni0.5Cu0.25Zn0.25Fe2−xInxO4 ferrites were synthesized by citrate–nitrate precursor auto combustion. ► Magnetic properties decreased due to the substitution of In3+ ions. ► Dielectric properties decreased with increase in frequency. ► This composition can be used for multilayer chip inductor (MLCI) applications. - Abstract: In submitted research; nanocrystalline powders having elements Ni0.5Cu0.25Zn0.25Fe2−xInxO4 with varied amounts of indium (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were grown-up by modified citrate to nitrate alchemy. The realism of single phase cubic spinel creation of the synthesized ferrite samples was studied by the DTA-TGA, XRD, SEM, EDX, FT-IR, VSM and dielectric measurements. SEM was applied to inspect the morphological variations and EDX was used to determine the compositional mass ratios. The studies on the dielectric constant (ε′), dielectric loss (ε″), loss tangent (tan δ), ac conductivity (σac), resistive and reactive parts of the impedance analysis (Z’ and Z”) at room temperature were also carried out. The saturation magnetizations (Ms) were determined using the vibrating sample magnetometer (VSM). Ms. decreased with the increase In3+ doping content, as Fe3+ of 5μB ions are replaced by In3+ of 0 μB ions.

  18. Sincor as a template for Canada

    Energy Technology Data Exchange (ETDEWEB)

    Sabbag, J.N. [Total Petroleum and Oil Co., State of Anzoategui, (Venezuela)

    2003-07-01

    This presentation outlined the Sincor heavy oil alchemy project, one of four upgrading projects in the Orinoco Basin in the Zuata Region in the State of Anzoategui, Venezuela. The objective is to turn 200,000 barrels per day of extra heavy oil into high quality, very low sulfur synthetic crude. The construction and start-up were outlined along with operating results and marketing issues. Production of the highly viscous oil has been enhanced through 3D seismic, horizontal drilling, multi-phase pumps, and real-time monitoring. Several viewgraphs were included with this presentation, depicting the Sincor well design, project development scheme, the industrial complex, and the upgrader facility. Since its launch in March 2002, approximately 25 million barrels of crude have been produced. The project is within budget and the planning and design concepts are on target. Market value and qualities have met expectations. The remaining challenge is to find ways to transfer the good experience of Sincor to Alberta. Total Petroleum Oil and Co. does not have a refinery in Canada and favours the same choice as the one made for Sincor. The Sincor project meets international specifications for air emissions, water effluent quality and noise level. Carbon dioxide emissions were not a design parameter at the onset of the Sincor project. It was noted that the conditions in Alberta include a higher CAPEX, hot versus cold production, higher gas price and inland location. For these reasons, the size of an upgrader in Alberta will have to be maximized. 7 tabs., 12 figs.

  19. Stellar Explosions: Hydrodynamics and Nucleosynthesis

    Science.gov (United States)

    José, Jordi

    2015-12-01

    Stars are the main factories of element production in the universe through a suite of complex and intertwined physical processes. Such stellar alchemy is driven by multiple nuclear interactions that through eons have transformed the pristine, metal-poor ashes leftover by the Big Bang into a cosmos with 100 distinct chemical species. The products of stellar nucleosynthesis frequently get mixed inside stars by convective transport or through hydrodynamic instabilities, and a fraction of them is eventually ejected into the interstellar medium, thus polluting the cosmos with gas and dust. The study of the physics of the stars and their role as nucleosynthesis factories owes much to cross-fertilization of different, somehow disconnected fields, ranging from observational astronomy, computational astrophysics, and cosmochemistry to experimental and theoretical nuclear physics. Few books have simultaneously addressed the multidisciplinary nature of this field in an engaging way suitable for students and young scientists. Providing the required multidisciplinary background in a coherent way has been the driving force for Stellar Explosions: Hydrodynamics and Nucleosynthesis. Written by a specialist in stellar astrophysics, this book presents a rigorous but accessible treatment of the physics of stellar explosions from a multidisciplinary perspective at the crossroads of computational astrophysics, observational astronomy, cosmochemistry, and nuclear physics. Basic concepts from all these different fields are applied to the study of classical and recurrent novae, type I and II supernovae, X-ray bursts and superbursts, and stellar mergers. The book shows how a multidisciplinary approach has been instrumental in our understanding of nucleosynthesis in stars, particularly during explosive events.

  20. The influence of electron beam direction and atomic weight on the ionization cross-section of metals by high-energy electrons

    International Nuclear Information System (INIS)

    The intensities of X-rays generated from samples of Ni3Al, Ni15 at.%Al and (TiNb)3Al were examined over a range of accelerating voltages as a function of diffracting conditions. It was found that the intensities of the X-rays from the heavier element in the alloys may be enhanced, with respect to the signal from the lighter element, when the sample is oriented at symmetry. This occurs for Ni and Ti with respect to the Al intensity in Ni3Al and (TiNb)3Al, even when the systematic row which is excited does not contain a superlattice reflection, and in Ni15 at.%Al which is effectively a disordered alloy. The situation in (TiNb)3Al is more complex, since although the Ti signal is enhanced with respect to the Al signal at symmetry for all reflections, the NbK intensity is not increased relative to the Ti signal but is increased relative to the Al intensity; the magnitude of this increase is about twice as great for reflections which lie in rows which contain superlattice reflections than for rows which do not. In contrast, the NbL intensity is decreased with respect to the TiK intensity when the crystal is set at symmetry for all types of systematic rows. These observations are interpreted in terms of the influence of atomic number on the sizes of electron shells and hence on their ionization cross-sections. The results are briefly discussed in terms of the technique of ALCHEMI, which is used to determine site occupancy in alloys, and in terms of the quantification of energy dispersive X-ray data from thin samples. (author)

  1. Delivery of Forecasted Atmospheric Ozone and Dust for the New Mexico Environmental Public Health Tracking System - An Open Source Geospatial Solution

    Science.gov (United States)

    Hudspeth, W. B.; Sanchez-Silva, R.; Cavner, J. A.

    2010-12-01

    New Mexico's Environmental Public Health Tracking System (EPHTS), funded by the Centers for Disease Control (CDC) Environmental Public Health Tracking Network (EPHTN), aims to improve health awareness and services by linking health effects data with levels and frequency of environmental exposure. As a public health decision-support system, EPHTS systems include: state-of-the-art statistical analysis tools; geospatial visualization tools; data discovery, extraction, and delivery tools; and environmental/public health linkage information. As part of its mandate, EPHTS issues public health advisories and forecasts of environmental conditions that have consequences for human health. Through a NASA-funded partnership between the University of New Mexico and the University of Arizona, NASA Earth Science results are fused into two existing models (the Dust Regional Atmospheric Model (DREAM) and the Community Multiscale Air Quality (CMAQ) model) in order to improve forecasts of atmospheric dust, ozone, and aerosols. The results and products derived from the outputs of these models are made available to an Open Source mapping component of the New Mexico EPHTS. In particular, these products are integrated into a Django content management system using GeoDjango, GeoAlchemy, and other OGC-compliant geospatial libraries written in the Python and C++ programming languages. Capabilities of the resultant mapping system include indicator-based thematic mapping, data delivery, and analytical capabilities. DREAM and CMAQ outputs can be inspected, via REST calls, through temporal and spatial subsetting of the atmospheric concentration data across analytical units employed by the public health community. This paper describes details of the architecture and integration of NASA Earth Science into the EPHTS decision-support system.

  2. It’s Not [Just] Cricket: The Art and Politics of the Popular – Cultural Imperialism, ‘Sly Civility’ & Postcolonial Incorporation

    Directory of Open Access Journals (Sweden)

    Andrew Jones

    2013-01-01

    Full Text Available Ashutosh Gowariker’s critically acclaimed Lagaan (2001, is a marvellous piece of cinematic troubling, which, via an astute use of allegory, reflects upon identity politics and power relations in both colonial and postcolonial contexts. Bringing two cornerstones of Indian popular culture together, namely cricket and Hindi formulae films, Gowariker produces an engagingly, affective alchemy of image and sound, which intervenes critically in the discourses of British colonial rule. This article’s intention is to demonstrate the mimetic devices inherent in Lagaan’s narrative, and how they mirror the regional resilience evident in the global success of both popular Indian cinema and the Indian performance of cricket. The sport of cricket and its role and effectiveness within a larger colonial project, is contextualized and reconsidered by tracing some resistant tangents in the sports evolution and performance in the Asia Pacific region. Making the most of the South Asian diaspora, which has exploited the networks and routes of the former British Empire, Indian popular cinema, likewise, serves to illustrate the point that local cultural dynamics can add their own nuances to global media flows. Interdisciplinary approaches are required to traverse within and between cultures, and to underscore the deep currents of contestation, as well as the radical and often surprising politics that characterise popular culture. In this respect, a range of scholars from different fields of study are consulted; Ashis Nandy, Arjun Appadurai, Chandrima Chakraborty and Homi Bhabha amongst them. Their voices will help to open up uncertainties in the conventional discourses, and to articulate some of the cultural politics and poetics at play in Lagaan specifically and the performance of cricket more generally.

  3. History of medicine and nephrology in Asia.

    Science.gov (United States)

    Chan, E L; Ahmed, T M; Wang, M; Chan, J C

    1994-01-01

    The beginning of Chinese medicine has been attributed to 3 mythical emperors who gathered herbs for medicines. During the 2nd century BC, Han dynasty physicians developed cranial trephining and sedation with wine and herbs for anesthesia. Chiang Chung-Ching (142-212 AD) used the appearance of rashes in diagnosis, treated infections with anthelmintics and asthma with ephedra, described the symptoms of diabetes mellitus and expanded medical ethics. The specialties of obstetrics, pediatrics, ophthalmology and dentistry were described in the records of the Han and Tang dynasties, and methods of setting fractures and treating trauma were comparable with those of Roman military doctors. Shen Tua (1031-1095 AD) compiled a pharmacopeia and studied acupuncture and the pulses. Forensic medicine was developed during the 10th century by Sung Tse, who also advocated hand washing with sulfur and vinegar to avoid infection during autopsies. The Daoist physicians used androgens and estrogens to treat hypogonadism with therapeutic preparations of placentas. They also had an advanced knowledge of alchemy, claiming to achieve 'immortality' by their preservation techniques. Qualifying examinations for physicians were conducted by the Chinese state as early as the 1st century AD, and later incorporated philosophy and art to conform with the Confucian ideal. Throughout these eras, Chinese medicine profited from contact with western Asia. In ancient Chinese medicine, the excretory function of the kidney was attributed to the bladder. 'Kidney weakness', which refers to somatized depression, was treated by acupuncture along the 'kidney channel'. Pulse examination was also used to give a measure of the imbalance of renal Yin and Yang.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7847458

  4. Fallen star legends and traditional religion of Japan: an aspect of star lore

    Science.gov (United States)

    Goto, Akira

    2015-08-01

    Japanese star lore is a complex mixture of animism, Buddhism, Shinto-ism, Confucianism and folk beliefs. Although some studies have been done on rituals concerning constellation developed in esoteric Buddhism (e.g. Journal Culture and Cosmos, Vol. 10 no 1 and 2), studies on other aspects of Japanese star lore are limited, in particular, to the English audience.In historic literatures, there often mentioned abnormal astronomical phenomena, such as, eclipse, meteors and comets. In this paper, I will discuss the possibility of reference to these astronomical phenomena in order to talk about some historical facts.In western part of Japan, there are Shinto shrines and Buddhistic temples that are said to be built as monuments of fallen stars. Usually fallen stars were divided into three, and a trio of shrines/temples are said to be the remnants of this phenomenon. Similar legends are found in Kudamatsu (that means "fallen pine=pine where stars fallen") of Yamaguchi Prefecture, Bisei-cho (that means "beautiful star") of Okayama Prefecture, Hoshida (that means "rice field or village of star") shrine of Osaka, and also Hoshida shrine of Nagoya.The purpose of this presentation is not to argue whether fallen star legend was truly astronomical phenomenon, such as, meteor or not. Instead, I will discuss why similar legends have been talked concerning the origin of particular shrines or temples. Citing Eliade who related gorge and alchemy producing spark to astronomical phenomena, I will disclose the possibility to relate these astronomical legends to the coming of the naturalized Japanese from Korean Peninsula who introducd forge to Japan abound 5 to 6 centuries.

  5. Nuclear astrophysics: a new era

    Energy Technology Data Exchange (ETDEWEB)

    Wiescher, Michael; Aprahamian, Ani [Department of Physics, University of Notre Dame (United States); Regan, Paddy [Department of Physics, University of Surrey (United Kingdom)

    2002-02-01

    The latest generation of radioactive-ion-beam facilities promises to shed light on the complex nuclear processes that control the evolution of stars and stellar explosions. The most fundamental question in nature is where do we come from, or, put another way, what are we made of? The late Carl Sagan poetically said that we are all made of stardust, but the origin of the elements has fascinated scientists for thousands of years. Many of the greatest medieval and renaissance scientists dabbled in alchemy, trying to create the elements that make up the cosmos, but we had to wait until the early 20th century to recognize that elements are really defined by the number of protons in the nucleus. According to our current understanding, after the big bang most of the normal or baryonic material in the universe consisted of the lightest two elements, hydrogen and helium, with only trace amounts of lithium and beryllium. All the heavier elements that occur naturally on Earth were created from this original material via a series of nuclear reactions in the cores of stars or in stellar explosions. Over the last decade, ground-based telescopes and satellite-based Observatories have opened new windows on the stars across the electromagnetic spectrum, from infrared to gamma radiation. New technology now makes it possible to observe and analyse short-lived stellar explosions. Indeed, the distribution of elements in 'planetary nebula' and in the ejecta of supernovae and novae give a direct glimpse of individual nucleosynthesis processes. In the February issue of Physics World, Michael Wiescher, Paddy Regan and Ani Aprahamian describe how sate-of-the-art facilities are set to plug many of the gaps in our understanding of nuclear astrophysics. (U.K.)

  6. WEATHER DERIVATIVES: THE MOST COMMON PRICING AND VALUATION METHODS

    Directory of Open Access Journals (Sweden)

    Botos Horia Mircea

    2013-07-01

    Full Text Available In recent years , weather derivatives have become a common tool in risk management for many sectors. This has its roots in that there is no unique way to determine de value and price solutions that would be generally approved by market-participants, like in the case of the Black-Scholes formula for options on non-dividend-paying stocks is the source for a constant debate between academics and practitioners. One look for fair and truly correct prices, while the others search every-day applicable solutions. To be honest... this is somehow like alchemy. This paper has as purpose the examination of statistical characteristics of weather data, data clearing and filling techniques. The study will be referring to temperatures because that is the best analyzed phenomenon, being the most common. This was also heavily influenced by energy companies and energetic interests, because the degree days were of interest ever before weather derivatives were put for sale. Main ideas are explaining what ways of pricing and valuation are, put into perspective for this financial instrument, taking into consideration that the Black-Scholes Model is not suitable. Also here, we will present the pros and cons that we found for each method. The methods are: the Burn analysis, the index value simulation method (IVSM, the daily simulation method (DSM.On the hole, this paper wants to shed light the weather derivatives pricing methods a mix of insurance pricing and standard financial models. At the end we will prospect the discounting problem, by means of the Consumption based Capital Asset Pricing Model (CCAPM.

  7. To succeed in the long-term, focus on the middle-term.

    Science.gov (United States)

    Moore, Geoffrey A

    2007-01-01

    When a mature company fails to endure over the long term, it's often due to the "Horizon 2 vacuum," argues Moore, author of Crossing the Chasm and several other books on innovation strategy, and managing director of the consulting firm TCG Advisors. The reference is to the strategic horizons outlined by McKinsey's Mehrdad Baghai and colleagues in The Alchemy of Growth: Horizon 1 is today's cash-generating business, Horizon 2 is the set of innovations just being commercialized, and Horizon 3 consists of forward-thinking R&D. Most companies understand they must invest in their future, so the funding and management of Horizon 3 is not the problem. The trouble starts when those innovations are brought to market and must compete with the mainstay business for company resources. They disappear from top management's radar screen and suffer a level of neglect few ventures could survive. Cisco Systems is one company that has recognized the problem and tried to address it. To begin with, CEO John Chambers has insulated Horizon 2 projects from many of the pressures of Horizon 1--for example, by reorchestrating sales coverage so that emerging markets won't be neglected. He has also kick-started some Horizon 2 businesses by augmenting them with acquisitions, increasing their scale, and giving them more management attention. For the same reason, he has challenged his head of product development to think in terms of new businesses, not simply new products--knowing that the latter tend to get lost in salespeople's bags. Most important, Cisco is handicapping its Horizon 2 projects so that they need not compete head-to-head with established businesses. Their success is judged by metrics that are appropriate to new businesses, and they are given the benefit of Cisco's best managerial talent. PMID:17642127

  8. Those astronomers crazy about the skies, or the story of the observation of double stars

    Science.gov (United States)

    Ling, J. F.

    2015-05-01

    Those astronomers crazy about the skies are people who have dedicated their lives, often their fortunes, to the research and study of double stars, enigmatic star systems that like to play hide and seek while dancing a mysterious waltz. Many efforts have been made to collect the wonderful golden harvest that celestial fields provide. Starting with Sir William Herschel, organist and brilliant astronomer who documented their orbital motions, the Struve clan who undertook the first census, the Anglican priest who discovered authentic celestial jewels and all the way to current international research teams using the greatest telescopes, they all searched with the same passion. They all went beyond the mere spectacle of the eternity of these pairs, seeking the Philosopher's Stone, the secret of stellar alchemy and the means to break down the wall that imprisons our knowledge. This book is the Spanish translation of the original French text written by Paul Couteau, one of the foremost authorities on the subject. No one better than him to immerse us into the knowledge of these objects, both scientifically and historically. Despite the 25 years since its publication, the text has not lost relevance. The story never dies and the attraction that still elicits has been one of the reasons to provide readers with this Spanish translation. In addition, we have included a chapter written by Josefina F. Ling. This version, published by the Department of Publications and Scientific Communications at the University of Santiago de Compostela and partially funded by the Spanish Society of Astronomy, has an initial print of 500 copies.

  9. Archetypal-Imaging and Mirror-Gazing

    Directory of Open Access Journals (Sweden)

    Giovanni B. Caputo

    2013-12-01

    Full Text Available Mirrors have been studied by cognitive psychology in order to understand self-recognition, self-identity, and self-consciousness. Moreover, the relevance of mirrors in spirituality, magic and arts may also suggest that mirrors can be symbols of unconscious contents. Carl G. Jung investigated mirrors in relation to the unconscious, particularly in Psychology and Alchemy. However, the relationship between the conscious behavior in front of a mirror and the unconscious meaning of mirrors has not been clarified. Recently, empirical research found that gazing at one’s own face in the mirror for a few minutes, at a low illumination level, produces the perception of bodily dysmorphic illusions of strange-faces. Healthy observers usually describe huge distortions of their own faces, monstrous beings, prototypical faces, faces of relatives and deceased, and faces of animals. In the psychiatric population, some schizophrenics show a dramatic increase of strange-face illusions. They can also describe the perception of multiple-others that fill the mirror surface surrounding their strange-face. Schizophrenics are usually convinced that strange-face illusions are truly real and identify themselves with strange-face illusions, diversely from healthy individuals who never identify with them. On the contrary, most patients with major depression do not perceive strange-face illusions, or they perceive very faint changes of their immobile faces in the mirror, like death statues. Strange-face illusions may be the psychodynamic projection of the subject’s unconscious archetypal contents into the mirror image. Therefore, strange-face illusions might provide both an ecological setting and an experimental technique for “imaging of the unconscious”. Future researches have been proposed.

  10. Archetypal-imaging and mirror-gazing.

    Science.gov (United States)

    Caputo, Giovanni B

    2014-03-01

    Mirrors have been studied by cognitive psychology in order to understand self-recognition, self-identity, and self-consciousness. Moreover, the relevance of mirrors in spirituality, magic and arts may also suggest that mirrors can be symbols of unconscious contents. Carl G. Jung investigated mirrors in relation to the unconscious, particularly in Psychology and Alchemy. However, the relationship between the conscious behavior in front of a mirror and the unconscious meaning of mirrors has not been clarified. Recently, empirical research found that gazing at one's own face in the mirror for a few minutes, at a low illumination level, produces the perception of bodily dysmorphic illusions of strange-faces. Healthy observers usually describe huge distortions of their own faces, monstrous beings, prototypical faces, faces of relatives and deceased, and faces of animals. In the psychiatric population, some schizophrenics show a dramatic increase of strange-face illusions. They can also describe the perception of multiple-others that fill the mirror surface surrounding their strange-face. Schizophrenics are usually convinced that strange-face illusions are truly real and identify themselves with strange-face illusions, diversely from healthy individuals who never identify with them. On the contrary, most patients with major depression do not perceive strange-face illusions, or they perceive very faint changes of their immobile faces in the mirror, like death statues. Strange-face illusions may be the psychodynamic projection of the subject's unconscious archetypal contents into the mirror image. Therefore, strange-face illusions might provide both an ecological setting and an experimental technique for "imaging of the unconscious". Future researches have been proposed. PMID:25379264

  11. Lattice resolution STEM

    International Nuclear Information System (INIS)

    Full text: Lattice-resolution scanning transmission electron microscopy (STEM) contrast, derived from coherent or incoherent scattering mechanisms, is finding application over a diverse range of problems on the atomic scale, particularly with the availability of coherent FEGs. Fundamental for the understanding of such contrast is the propagation within a crystal of a focused coherent probe formed by a collapsing spherical wave. Current Bloch wave descriptions construct the total wave function from a coherent superposition of Bloch states excited from a series of incident plane waves that span the full range of transverse momentum components in the focused probe. However this implementation of boundary conditions using phase-linked plane waves may be misleading in that the possibility of exciting antisymmetric states which provides the cross-talk between adjacent columns of atoms - appears at first sight to be excluded. We match the total probe wave function to a crystal wave function which incorporates all transverse momenta in the incident probe. This revised implementation of boundary conditions leads to a simple formula for excitation amplitude which enables the probe position dependent excitation of both symmetric and antisymmetric Bloch states to be predicted. Shortcomings of previous models for incoherent contrast are that interference between waves associated with mixed dynamic form factors for incoherent contrast is not addressed, and that an intensity contribution from dechannelled electrons is not taken into account. This simple revision of boundary conditions leads to a rigorous formulation for (i) coherent and (n) incoherent lattice resolution STEM contrast. The former (i) does not require principles of reciprocity to be invoked, and the latter (n) follows from a simple generalization of the theory of channelling contrast for ADF, BSE and ALCHEMI for an incident plane wave. Phase associated with products of transition amplitudes that occur in mixed

  12. Arnaldo Da Villanova medieval physician (1235-1311). A first approach.

    Science.gov (United States)

    Ricciardi, Biagio; Ricciardi, Elisabetta; Ricciardi, Carlo Alberto

    2016-02-01

    Arnaldo de Villanova, was a Catalan Physician, born in Villanova de Grau, a suburb of Valencia - Spain about 1235. He died off the coast of Genoa in 1311 during a sea voyage departing from Messina in Sicily, during a diplomatic mission by Pope Clement V in Avignon on orders by the King of Sicily. He was a so famous and clever scientist of the thirteenth century, to give his name to the Universitary Hospital of Montpellier - France. His interests ranged from theology, to politics, medicine, and anymore alchemy. He was an adviser and physician of Kings of Aragon, like Peter III the Great (1276-1285) and James II the Right (1285-1327), of Robert of Angi (1309-1343) of Naples, and of Popes, like Innocenzo V (1276), Bonifacio VIII (1294-1303), Benedetto XI (1303-1304), Clemente V (1305-1314), and of the King of Sicily Federico II of Aragon (1296-1337). For the Pope Bonifacio VIII, suffering from renal colic due to kidney stones, he prescribed Hydrotherapy with Fiuggi Thermal water, that was specially transported for him from its source to Rome and Anagni, in jars wrapped in coarse carpets or wool fabrics, to better maintain the source temperature. In addition in July of 1301, he also produced an astrological seal (Talisman) made of gold loaded of virtues, obtained exposing the seal to the power of the Sun, in those days in the Leo Constellation. This seal was worn by the Pope in an hernial belt of leather to support the kidney,probably to improve hisnephroptosis. Arnaldo produced this seal according to what was described in the book Picatrix - The goal of the wise of the Arabic astronomer and alchemist "Abū l-Qāsim Maslama b.- Ahmad al-Majriti, known with the pseudonym Ghayat al hakim died in Cordova about 1008. Ten years later, after his mysterious death at sea on a Sicilian royal ship, his body was not buried at sea, but was reported in Sicily and buried in the Federician Castle of Montalbano of Elicona at the end of Peloritans Mountains near Milazzo, about 90 km

  13. [Corpus Hermeticum in history].

    Science.gov (United States)

    Bugaj, R

    2001-01-01

    The originator and founder of hermetism was the mythical Hermes Trismegistos, a deity of the syncretic Hellenistic religion that came into being through the identification of the Greek god Hermes with the Egyptian god Thot. In later Hellenistsic times various hermetic writers considered Hermes Trismegistos to have been a historical personage, a king, prophet and philosopher (physician), as well as author of many widely disseminated writings that made up the so-called Corpus Hermeticum (eighteen separate treatises from the 2nd-4th centuries AD) and the so-called Emerald Table (Tabula Smaragdina). The Corpus Hermeticum is a collection of treatises of a philosophical, religious, theological as well as theosophical nature. The collection played an important role in the development of the philosophy of alchemy and hermetism, and formed the basis for an alchemist philosophy of nature. There are currently two views among scholars on the origins of hermetism. According to one, hermetism derived directly from Egypt, while according to the other it orginated in Greece. In the years 1945-46 a number of hermetic texts forming part of the now famous gnostic "library" were discovered in Nag-Hammadi (Chenosboskion) in Upper Egypt. The Coptic texts from Nag-Hammadi date from the middle of the 4th century AD, and according to experts are translations from the Greek. Some authors (R. Reitzenstein and T. Zieliński) have suggested that along with the appearance in Egypt of the Hermetic Books, attributed to Hermes Trismegistos, there also appeared a new god in Egypt, Poimandres, and a new religion was established, hermetism, which competed for influence with Christianity. The present article discusses the main of the hermetic treatises, including Poimandres, which contains an account of the creation of the world. The article also discusses the reasons for the decline of hermetism as a religion and stresses that in spite of this decline the doctrine managed to survive in the form of

  14. De los dioses a los hombres: Un recorrido histórico del descubrimiento de los elementos químicos

    Directory of Open Access Journals (Sweden)

    Pellón González, I.

    2014-12-01

    Full Text Available To achieve the apparently simple Periodic Table of the Elements has implied tremendous efforts over thousands of years. In this paper we present a brief history of the discovery of the chemical elements from prehistory to the present day, revealing the controversies that arose on the way and claiming the important work performed by alchemists in the advancement of knowledge. This is especially important if we consider that alchemy had a period of existence of many thousands of years, while the “Chemistry”, officially established as a science in the eighteenth century, has operated as such for only a few hundred years. Even so, if we consider the progress of discovery and isolation of chemical elements throughout history, it can be observed that the number of elements identified is achieved mainly in the nineteenth and twentieth centuries, reflecting the development of instrumental techniques, that facilitated this task.Llegar hasta la aparentemente sencilla Tabla Periódica de los Elementos le ha costado a la humanidad enormes esfuerzos a lo largo de miles de años. En este trabajo se recorre la historia del descubrimiento de los elementos químicos desde la Prehistoria hasta nuestros días, reflejando las controversias que se suscitaron y reivindicando el importante trabajo que realizaron los alquimistas en el progreso de los conocimientos, ya que la alquimia tuvo un período de existencia de muchos miles de años, mientras que la “Química” oficialmente establecida como ciencia en el siglo XVIII consta de sólo unos cientos de años. Aún así, al realizar un balance de la progresión del descubrimiento y aislamiento de los elementos químicos a lo largo de la Historia se puede comprobar el elevado número de elementos identificados en los siglos XIX y XX, reflejo del perfeccionamiento de las técnicas instrumentales que facilitaron esta labor.

  15. [King Jung-jo's medical philosophy].

    Science.gov (United States)

    Kim, Sun Hyung; Kim, Dal Rae

    2009-12-01

    King Jungjo who introduced the advent of cultural renaissance of Chosun Dynasty as little been known about his work in medicine. With a wide knowledge in medicine, he was the only one among the kings who wrote a book on medicine, called "SueMinMyoJeon". In this paper, his perspective on medicine will be looked into based on "The Annals of the Chosun Dynasty", "Seungjeongwon Ilgi", "Hong Je jun Se", "KukGoBoGam", "Ildkrok", "JeJungShinPyun", "SueMinMyoJeon" etc. King Jungo valued empiricism in the field of medicine. He deepened understandings in medicine while taking care of King Youngjo, the late king. And it led him to author "SueMinMyoJeon" himself, and further ordered the publications of "JeJungShinPyun" "MaGuaHeoiTong". These two books were conducted to include empirical cases of folklore remedy. King Jungjo's medical philosophy can be epitomized in filial piety and realization of people-serving politics, which are the essentials of Confucianism. His filial piety towards the late king, Youngjo and his mother is shown in his devotion when taking care of them. Especially the way he examined the differentiation of diseases and corresponding treatments is well described in "The Annals of the Chosun Dynasty". "JeJungShinPyun" was also published and it came handy for folk villagers in times of medical needs. Later this book influenced "BangYakHaepPyun" by Hwang Do Yeon. King Jungjo emphasized pragmatism in spreading medical knowledges, thus removing the theoretical contents that are related to Taoism, especially the ones on alchemy from "DongEuiBoGam", when publishing "SueMinMyoJeon". Even the excerpts from "SoMun" were taken out, if not practical. King Jungjo, however, discussed the importance of healthy regimen and mentioned himself practicing it from the book "IlDeukLok", which seems to be the only book that derailed from the pragmatistic track. King Jungjo put emphasis on consistency between diagnosis and treatment. In diagnosing, Meridian pulse was taken

  16. Electronic Structure of Transition Metal Clusters, Actinide Complexes and Their Reactivities

    International Nuclear Information System (INIS)

    This is a continuing DOE-BES funded project on transition metal and actinide containing species, aimed at the electronic structure and spectroscopy of transition metal and actinide containing species. While a long term connection of these species is to catalysis and environmental management of high-level nuclear wastes, the immediate relevance is directly to other DOE-BES funded experimental projects at DOE-National labs and universities. There are a number of ongoing gas-phase spectroscopic studies of these species at various places, and our computational work has been inspired by these experimental studies and we have also inspired other experimental and theoretical studies. Thus our studies have varied from spectroscopy of diatomic transition metal carbides to large complexes containing transition metals, and actinide complexes that are critical to the environment. In addition, we are continuing to make code enhancements and modernization of ALCHEMY II set of codes and its interface with relativistic configuration interaction (RCI). At present these codes can carry out multi-reference computations that included up to 60 million configurations and multiple states from each such CI expansion. ALCHEMY II codes have been modernized and converted to a variety of platforms such as Windows XP, and Linux. We have revamped the symbolic CI code to automate the MRSDCI technique so that the references are automatically chosen with a given cutoff from the CASSCF and thus we are doing accurate MRSDCI computations with 10,000 or larger reference space of configurations. The RCI code can also handle a large number of reference configurations, which include up to 10,000 reference configurations. Another major progress is in routinely including larger basis sets up to 5g functions in thee computations. Of course higher angular momenta functions can also be handled using Gaussian and other codes with other methods such as DFT, MP2, CCSD(T), etc. We have also calibrated our RECP

  17. Electronic Structure of Transition Metal Clusters, Actinide Complexes and Their Reactivities

    Energy Technology Data Exchange (ETDEWEB)

    Krishnan Balasubramanian

    2009-07-18

    This is a continuing DOE-BES funded project on transition metal and actinide containing species, aimed at the electronic structure and spectroscopy of transition metal and actinide containing species. While a long term connection of these species is to catalysis and environmental management of high-level nuclear wastes, the immediate relevance is directly to other DOE-BES funded experimental projects at DOE-National labs and universities. There are a number of ongoing gas-phase spectroscopic studies of these species at various places, and our computational work has been inspired by these experimental studies and we have also inspired other experimental and theoretical studies. Thus our studies have varied from spectroscopy of diatomic transition metal carbides to large complexes containing transition metals, and actinide complexes that are critical to the environment. In addition, we are continuing to make code enhancements and modernization of ALCHEMY II set of codes and its interface with relativistic configuration interaction (RCI). At present these codes can carry out multi-reference computations that included up to 60 million configurations and multiple states from each such CI expansion. ALCHEMY II codes have been modernized and converted to a variety of platforms such as Windows XP, and Linux. We have revamped the symbolic CI code to automate the MRSDCI technique so that the references are automatically chosen with a given cutoff from the CASSCF and thus we are doing accurate MRSDCI computations with 10,000 or larger reference space of configurations. The RCI code can also handle a large number of reference configurations, which include up to 10,000 reference configurations. Another major progress is in routinely including larger basis sets up to 5g functions in thee computations. Of course higher angular momenta functions can also be handled using Gaussian and other codes with other methods such as DFT, MP2, CCSD(T), etc. We have also calibrated our RECP

  18. Educação, meio ambiente e cultura: alquimias do conhecimento na sociedade de controle Education, environmental and culture: alchemical of knowledge in the control society

    Directory of Open Access Journals (Sweden)

    Ana Godoy

    2009-12-01

    Full Text Available Por meio da noção de regime pedagógico, investiga-se a articulação entre epistemologia e política em dois eixos de funcionamento: um em torno da disciplina corporal ligado às exigências do processo de industrialização, outro em torno da autonomia do sujeito ligado à formação dos Estados nacionais. Os historiadores da educação situaram no coração das práticas escolares a inscrição pedagógica do cidadão como sujeito político dotado de direitos e obrigações; essa inscrição respondeu às exigências inerentes ao quadro conceitual próprio das sociedades democráticas. A noção de alquimia, proposta por Popkewitz, foi retomada para compreender como as práticas pedagógicas traduzem saberes disciplinares em conteúdos psicológicos que são inseparáveis de contextos políticos mais amplos; esse aspecto confere à pedagogia uma dimensão estratégica que deve ser levada em conta na análise dos investimentos pedagógicos no presente. Considerando as características que atravessam as práticas sociais de nossos dias, a intervenção de tipo ambiental (Foucault e a lógica do controle (Deleuze, são abordados Educação, Meio Ambiente e Cultura como domínios de objetos sobre os quais atua o investimento pedagógico hoje.Through the notion of pedagogic regime, we investigate the articulation between epistemology and politics in two operational axes: one concerning the body discipline related to the needs of the industrialization process, the other concerning the subject's autonomy related to the formation of the national States. Educational historians set, on the core of school practices, the citizen's pedagogic inscription as a political citizen endowed with rights and obligations; this inscription responded to the inherent demands of the democratic societies' own conceptual perspectives. The alchemy notion, proposed by Popkewitz, was used to comprehend how pedagogic practices translate discipline knowledge into

  19. BOOK REVIEW: Tycho Brahe and Prague: Crossroads of European Science

    Science.gov (United States)

    Sterken, C.; Christianson, J. R.; Hadravová, A.; Hadrava, P.; Solc, M.

    2003-01-01

    The 16th volume of the Acta Historica Astronomiae is the Proceedings of the International Symposium on the History of Science in the Rudolphine Period. The meeting was held in Prague from 22 to 25 October 2001, on the 400th anniversary of Tycho's sudden death, and was attended by approximately 65 scientists and historians. The volume contains 36 contributions dealing with the life and work of Tycho Brahe, the astronomy of the era, and many cultural aspects of Rudolphine Prague. One of the first papers is an eye-opener on the fact that Tycho Brahe was a cosmologically-driven observer. This is followed by a very illuminating paper on gender roles in science in the late 16th century, with emphasis on the role of Sophie Brahe, Tycho's youngest sister. Several subsequent papers reveal the existence of barely known links between Tycho and his contemporaneous colleagues. These extremely-well documented papers also deal with the broader philosophical investigation he was involved in, viz. meteorology, medicine, astrology, alchemy and even theology. Important names of Tycho's days are Petrus Severinus, Johannes Pratensis, Theophrastus Paracelsus, John Craig, Ursus (Nicolai Reymers Baer) etc. Very illuminating is the information on the relations between Tycho and the Jesuits in Prague, explaining the reason why this order was very supportive of the Tychonic cosmological model. The relationsship with Kepler, and also Kepler's observational activities (after Tycho's death) are highlighted as well as the hideous mode of communication between Galileo and Kepler. More than one paper deals with the accuracy and precision of Tycho's observations, and the causal impact of this accuracy on the scientific revolution. Another study discusses the study of Tycho's handwriting, this paper brings the aditional bonus of a list of accessible works which contain notes by him. One very interesting project was Brahe's proposal to the Republic of Venice to determine the exact latitudes of

  20. Synthesis of Black and Red Mercury Sulfide Nano-Powder by Traditional Indian Method for Biomedical Application

    International Nuclear Information System (INIS)

    The use of metals and minerals in the traditional Indian system of medicine known as aired is very common and is practiced since seventh century B.C. Metals were reduced to calcined powder form for medicinal purpose. For detoxification, a further step of purification of the metals and minerals with different vegetable extracts was practiced. The people of East India were using mercury and its sulfide as medicine. Gradually this secret was leaked to Arabic physicians who used mercury in skin ointment. Subsequently Italian Physicians adopted Arabic prescriptions of mercurial ointments for skin diseases. In the olden days, metals and minerals were impregnated with decoction and juice of vegetables and animal products like milk and fat for purification. These were then reduced to fine particles by milling with a pestle and mortar. It was known by then that the fineness of the powder had a significant influence on the color, texture, and medicinal properties as is cited by Charak. Nagarjun studied in detail the processing of metals and minerals, particularly mercury and the influence of the processing parameters on the medicinal values. Mercury is unique in many aspects. Indian alchemy developed a wide variety a chemical processes for the ostensible transmutation of metals and preparation of elixir of life, in which mercury occupied a prime position .The present investigation attempts to use the traditional methods as prescribed in the ancient texts to prepare mercury sulfide in both red and black form for medicinal use. XRD, SEM and HRTEM investigations of the sulfides obtained shows that the ancient Indians were able to produce nano-sized powders. Possibly this may be taken as the earliest application of the production and use of nano powder. The study proves that even in ancient time the knowledge of nano particle synthesis was prevalent and used to enhance effectiveness of medicines. Further mercury in the free form is not acceptable in medicines. The ancient

  1. History of the discovery of transmutation at Texas A and M University

    Energy Technology Data Exchange (ETDEWEB)

    Bockris, J.O.M. [Molecular Green Technology, College Station, TX 77845 (United States)

    2006-07-01

    . Earlier (1990) the author had received a letter from a Roberto Monti. He complained that he had not got a reply from writing to Fleischmann and Pons and he decided to write to him instead. His letter concerned a theory which he said would easily rationalize the synthesis of tritium from deuterium and moreover indicate conditions under which many elements in the periodic table could be transmuted to neighboring elements in the cold. On reading the letter, the author thought that the writer must be elderly and out of touch with theoretical chemistry, for what he said was clearly impossible, indeed, it sounded like a claim to alchemy. The author replied, humoring the writer and promised to meet with him in the forthcoming Cold Fusion meeting in Como in Italy (1991). When the author met, Monti he was astonished to find that Monti seemed to be a bright normal person about 40-year old and speaking in a vigorous and seemingly informed manner. He had an established position in an Italian Research Institute in Bologna. His emphasis was not on the reactions which Fleischmann and Pons had carried out but on his own work where he claimed that he was able to carry out transmutation reactions. In spite of author's impression that Monti was a normal scientist, the author still regarded transmutation with extreme skepticism.

  2. History of the discovery of transmutation at Texas A and M University

    International Nuclear Information System (INIS)

    had received a letter from a Roberto Monti. He complained that he had not got a reply from writing to Fleischmann and Pons and he decided to write to him instead. His letter concerned a theory which he said would easily rationalize the synthesis of tritium from deuterium and moreover indicate conditions under which many elements in the periodic table could be transmuted to neighboring elements in the cold. On reading the letter, the author thought that the writer must be elderly and out of touch with theoretical chemistry, for what he said was clearly impossible, indeed, it sounded like a claim to alchemy. The author replied, humoring the writer and promised to meet with him in the forthcoming Cold Fusion meeting in Como in Italy (1991). When the author met, Monti he was astonished to find that Monti seemed to be a bright normal person about 40-year old and speaking in a vigorous and seemingly informed manner. He had an established position in an Italian Research Institute in Bologna. His emphasis was not on the reactions which Fleischmann and Pons had carried out but on his own work where he claimed that he was able to carry out transmutation reactions. In spite of author's impression that Monti was a normal scientist, the author still regarded transmutation with extreme skepticism

  3. Synthesis of Black and Red Mercury Sulfide Nano-Powder by Traditional Indian Method for Biomedical Application

    Science.gov (United States)

    Padhi, Payodhar; Sahoo, G.; Das, K.; Ghosh, Sudipto; Panigrahi, S. C.

    2008-10-01

    The use of metals and minerals in the traditional Indian system of medicine known as aired is very common and is practiced since seventh century B.C. Metals were reduced to calcined powder form for medicinal purpose. For detoxification, a further step of purification of the metals and minerals with different vegetable extracts was practiced. The people of East India were using mercury and its sulfide as medicine. Gradually this secret was leaked to Arabic physicians who used mercury in skin ointment. Subsequently Italian Physicians adopted Arabic prescriptions of mercurial ointments for skin diseases. In the olden days, metals and minerals were impregnated with decoction and juice of vegetables and animal products like milk and fat for purification. These were then reduced to fine particles by milling with a pestle and mortar. It was known by then that the fineness of the powder had a significant influence on the color, texture, and medicinal properties as is cited by Charak. Nagarjun studied in detail the processing of metals and minerals, particularly mercury and the influence of the processing parameters on the medicinal values. Mercury is unique in many aspects. Indian alchemy developed a wide variety a chemical processes for the ostensible transmutation of metals and preparation of elixir of life, in which mercury occupied a prime position .The present investigation attempts to use the traditional methods as prescribed in the ancient texts to prepare mercury sulfide in both red and black form for medicinal use. XRD, SEM and HRTEM investigations of the sulfides obtained shows that the ancient Indians were able to produce nano-sized powders. Possibly this may be taken as the earliest application of the production and use of nano powder. The study proves that even in ancient time the knowledge of nano particle synthesis was prevalent and used to enhance effectiveness of medicines. Further mercury in the free form is not acceptable in medicines. The ancient

  4. Aspectos históricos do ensino superior de química Historical aspects of higher learning in chemistry

    Directory of Open Access Journals (Sweden)

    Juergen Heinrich Maar

    2004-03-01

    as well decisive factors for the structural and institutional changes observed. We will not at this point argue about the essential issues related to curricula, practices, texts or programs. A history which, not limited to the rankean wie es wirklich gewesen ist , looks for collecting the necessary data before a deeper discussion of contents, methods and results of higher chemical education in each one of the periods considered could take place, leaving a more profound discussion for future papers. But we do insert chemistry in the university context as a whole. From a chronological viewpoint, we will comment the period extending from medieval university to the beginnings of the 19th century, just to the consolidation of chemistry as an university discipline: after comments on the unformal relations between alchemy and medieval university, we will comment chemistry/chemiatry related to medicine and pharmacy (16th and 17th centuries, a more "applied" chemistry in connection with metallurgy and other industries/"arts" (18th century, and an independent chemistry located not at the medical but at the philosophical faculty, for the first time in 1789. At the eve of the 19th century, chemistry establishes itself as an autonomous activity at universities and institutions of higher learning.

  5. Water 2010. Abstracts; Wasser 2010. Kurzreferate

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    Within the Annual Conference 2010 of the Wasserchemischen Gesellschaft (Berlin, Federal Republic of Germany) from 10th to 12th May, 2010, in Bayreuth (Federal Republic of Germany) the following lectures were held: (1) Retention and fouling in submerged membranes and hybrid procedure (F. Saravia); (2) Fouling of organic membranes in the ultrafiltration of municipal sewage sludges (J. Haberkamp); (3) Arsenic meets NOM - On the abiotic interactions of a toxic element with natural organic material (M. Bauer); (4) Application possibilities of modern bio-analytic methods in the water chemistry? (U. Billitewski); (5) Discussion of the applicability of new reporter cell test systems for the detection of pharmaceutical active substances in water (D. Sokolis); (6) Analytics of chlorine paraffines - a priority group of materials of the European Water Framework Directive (Preparation of ISO 12010) (S. Geiss); (7) Investigation of the disinfection side products in the chlorinbation of N,N-dimethyl sulfamid (DMS) (O. Happel); (8) Development of a photometric analysis method for polyfluorinated chemicals (PFC) as a basis for a cost-effective process monitoring analytics in the galvanic industry (A. Emmel), (9) An investigation of the elution of organic trace contaminants from artificial turf into the groundwater by means of HPTLC/AMD in combination with LC-MS (S.C. Weiss); (10) From the alchemy to contaminated sites - The chemical factory Marktredwitz: It began with the production of gold, at the end it cost million Euro (R. Roeder); (11) An investigation of the influence of the water quality on the effort for drinking water purification - a statistic model (B. Skibinski); (12) Phosphate adsorption onto granular ferric hydroxide: isotherm and fixed-bed column studies (A. Sperlich); (13) Advantages of an upstream bank filtration in the combination of ozonation and groundwater recharge (U. Huebner); (14) An oxidative treatment of barrage water in the purification of drinking water

  6. Savoirs mondains, savoirs savants : les femmes et leurs cabinets de curiosités au siècle des Lumières

    Directory of Open Access Journals (Sweden)

    Adeline Gargam

    2010-01-01

    Full Text Available Dans la France des Lumières, la culture de la curiosité est un phénomène de mode mais surtout un jeu social et intellectuel. La présente étude entend retracer l’histoire d’une trentaine de cabinets féminins de curiosité tenus à cette époque. Des femmes fortunées de l’aristocratie et de la bourgeoisie parisienne et provinciale ont alors constitué sous l’emprise de leur libido sciendi des cabinets d’alchimie, de minéralogie, de physique‑chimie, d’histoire naturelle et d’anatomie naturelle et artificielle. Ces cabinets obéissent à une typologie particulière. Il en existe deux catégories : les cabinets d’amateurs, constitués pour la parade et le spectacle des visiteurs et fonctionnant comme de véritables écoles de plaisirs intellectuels et éducatifs ; les cabinets à finalité scientifique et didactique, formés par des savantes expérimentées qui se livrent dans leurs laboratoires à des recherches personnelles et expérimentales au nom des progrès de la science médicale et de l’instruction publique. La réflexion porte aussi sur le fonctionnement de ces cabinets privés de curiosité, particulièrement sur leur mode de constitution, leur décor intérieur ainsi que sur le contenu des collections qui nécessitaient certaines techniques d’organisation, d’acquisition et de conservation communes à celles de leurs homologues masculins.During the Enlightenment in France, curiosity culture constituted both a fashion and an intellectual and social game.  This article explores thirty cabinets of  curiosities run by women during this period. Wealthy women from the Parisiain and provincial aristocracy and middle classes organized cabinets in alchemy, mineralogy, physics and chemistry, natural history and biology studies. These cabinets can be divided into two distinct categories. The first represented amateur interests; they were developed for show and served as schools for intellectual and

  7. Pratiques historiennes croisées de la mémoire et expériences de l’histoire dans L’Invention du quotidien (1980 de Michel de Certeau et Le Passé d’une illusion (1995 de François Furet.

    Directory of Open Access Journals (Sweden)

    Daniel Poitras

    2011-04-01

    end of the moment mémoriel in the West: L’Invention du quotidien (1980 by Michel de Certeau, Le Passé d’une illusion (1995 by François Furet. By identifying two historians’ uses of “memory” and to what they relate, the author tries less to define an inventory or the contents of memory than to explore the current operations practiced by the historian in order to make the past “act” in the present of the contemporaries that he studies. Instead of thinking memory as a “something” for which it would suffice to identify its characteristics, we will outlined a few characteristics defining how historians use memory, a use that consists less of a theoretical and systematical articulation than of a epistemological sensibility which is itself solidary of a feeling of historicity. Distant in many respects to each other, the books are marked by their contemporaneity, beyond their respective objects and approaches, as such that the temporal articulation done by the historian covers tenuously his own experience of history. Memory, though not the object of neither books, is constantly solicited, either as a vast background (collective memory or as an explicative principle in order to understand the contemporaries’ actualizations, the influence of their memories and the alchemies that they effectuate between their practices, passions and beliefs. Separated by their objects, the historians François Furet and Michel de Certeau find eventually themselves around the problem of modernity, sending back the comparatist to its own game and to the distance that he has created or abolished between his “objects” and him.

  8. 作为设计教学战略的异常事物与惯例辩证法——1996~2007哈佛大学第一学年工作室课程%The Dialectic of Anomaly and Convention as a Strategy for Design Pedagogy——The First Year Studio Curriculum at Harvard,1996~2007 Studio Scope

    Institute of Scientific and Technical Information of China (English)

    普雷斯顿·斯科特·科恩

    2007-01-01

    I believe core pedagogy to be the issues at the root of the core, at the very beginning of education.The first year core pedagogy has been caught in a double bind. The problem arises from an understanding that the best architects today are not the ones with the best ideas or best techniques. They are the ones who produce a strange alchemy between the kinds of ideas they have and the technical means they possess. The blend of ideas and techniques makes it difficult to be didactic and to establish criteria for critique and discourse. Thus, in architectural design studios, the main method of teaching is story telling, The accumulated wealth of stories allows one to say things by analogy that are difficult to confront head on.The core has been running on two parallel tracks; a focus on architectural and building typologies and a focus on geometry and tectonics. In both cases, problems of contradiction and paradox are used to disturb a theoretically consistent typology or order of things, as a means to introduce the notion of convention or regularity in architecture. Architects being conscious of this fact must make up their own sets of architectural conventions, or establish them by reference to a consistent body of knowledge.In the end, problemitization is the protagonist of everything in architecture. Thus it is the design of problems, and the teaching of sensibilities about the problems, that is at stake in design teaching. KEYWORDS strategy for design pedagogy,dialectic of convention,studio curriculum%在教育刚开始的阶段,核心课程教育是本源.第一年的核心课程教学受着双重的束缚.问题来源于这样一个认识:今天最好的建筑师不是那些有着杰出的想法或是卓越技术之人,而是那些能在所拥有的各种想法和所掌握的技术手段之间产生神奇魔力之人.观念和技术的融合是难以传授的,也没有批评和论述的标准.因此,在建筑设计工作室里,主要的教学方式便是讲故

  9. Fragmentos da história das concepções de mundo na construção das ciências da natureza: das certezas medievais às dúvidas pré-modernas Episodes in the history of conceptions of the world of natural sciences: from medieval certainties to pre-modern doubts

    Directory of Open Access Journals (Sweden)

    Antônio Fernandes Nascimento Júnior

    2003-01-01

    do mundo. Os pensadores italianos, como uma reação à Escolástica, constroem um pensamento humanista influenciado pelo pensamento grego clássico original e pelos últimos filósofos bizantinos. Por todas essas mudanças se inicia a construção de um novo universo e de um novo método, que viria décadas mais tarde.The philosophical concept of world thought begins with the Greeks, synthesized by Plato and Aristotle. For Plato the one physical world is apparent and, to reach the truth, it is necessary to remember the original ideas that determine its meaning. For Aristotle, material things are guided by ideas and logic is needed to understand them. During the Hellenistic period, the school of Alexandria elaborated Neo-Platonism, the base of Patristics. After the fall of Rome, the Byzantine philosophers kept the classic inheritance. The Church built a Neo-Platonic vision of Christianity, Scholastacism. In the east the Persians also came under Greek influence. Among the Arabs of the East Neo-Platonic thought guided philosophers and religious people so that for them reason and faith were not separated. At this point sciences grew: physics, alchemy, botany, medicine, mathematics and logic, until they were overtaken by the conservative doctrine of the Ottomans. In Muslin Spain, without the restrictions of theology, Aristotle's philosophy was better understood than in the rest of Islam.

  10. Matta en el inverso del universo con sus amigos detrás del espejo

    Directory of Open Access Journals (Sweden)

    Enrique de Santiago

    2015-08-01

    . Matta evokes the immersion from a project of the being to a cosmic and alchemic project where the relationship between alchemy and science concurs with irrevocable determination: Eliphas Lévi, Fulcanelli, and Albert Einstein; the text also deals with the communication means between artist Matta’s search and his very free commitment to the surrealistic movement (Breton and to himself, en la medida en lo extrae y traduce ??? from such artistic movement and from his interventions and participation in movements of modern art and his own movement. According to Roberto Matta’s own words in 1965: An artist’s role in our society involves being that glaring and repudiated character (the child of Andersen’s short story who is the only one that affirms that the king is nude. This denouncement of the scandal makes of him a minority member. For the artist, it is not a question of establishing a relationship between color blue and color green: these aesthetic scenarios belong in a certain way to those who contemplated them. On the contrary, I want to agitate so that the contemplating person becomes a minority member. I want the spectator to be possessed by the picture instead of possessing it; I want him to be bombarded from everywhere with a huge amount of consciousness. In this way, caught within an unbearable situation caused by the picture, he is then forced to perform a poetic creation act to possess it: beset by the real world he feels defeated and then forced to reflect. In this way, this essay about Roberto Matta deals with the aesthetic furor. There is not aesthetics without science and evidence, as proposed and induced by Matta.

  11. EDITORIAL: Power is nothing without control Power is nothing without control

    Science.gov (United States)

    Demming, Anna

    2012-04-01

    review, synthesis of these materials is now a refined art allowing considerable control over the parameters. The mechanisms behind the growth using different techniques is also understood, making the alchemy of creating these prized nanostructures into an advanced science. With these new nanomaterials researchers in nanoscale science and technology now have the power to create devices with performance attributes previously unimagined, and the advancing fine art of controlled synthesis allows these devices to be made on demand. References [1] Kroto H W, Heath J R, O'Brien S C, Curl R F and Smalley R E Nature 318 162-3 [2] Iijima S 1991 Nature B 354 56-8 [3] Journet C, Picher M and Jourdain V 2012 Nanotechnology 23 296-304 [4] Singh N, Zhang T and Lee P S 2009 Nanotechnology 20 195605 [5] Qiu J, Li X, He W, Park S-J, Kim H-K, Hwang Y-H, Lee J-H and Kim Y-D 2009 Nanotechnology 20 155603 [6]Dmitriev S, Lilach Y, Button B, Moskovits M and Kolmakov A 2007 Nanotechnology 18 055707 [7] Hao H L and Shen W Z 2008 Nanotechnology 19 055601 [8] Rocha A R, Martins T B, Fazzio A and da Silva A J R 2010 Nanotechnology 21 345202

  12. Inventário e digitalização do patrimônio museológico da educação: um projecto de preservação e valorização do património educativo - The inventory and digitalization of the heritage museum of education: a project of preservation and valorization of the ed

    Directory of Open Access Journals (Sweden)

    Maria João Mogarro, Fernanda Gonçalves

    2011-03-01

    reused. Historically, these objects are connected to several of the subjects taught; they play a key role in the interconnection between scientific knowledge and the  alchemy to which this knowledge was subjected  in   order  to  become  teaching  material.  We  establish, therefore,  the  convergence with  the  current  policies   that   value education  and cultural heritage, with  research  and organisation of museums dedicated to the school, to its heritage and legacy in several countries.  It   is  a   transnational   movement,  and  the  similarities between countries emphasise the globalisation of the school form and its materials. Keywords: Educational heritage; inventory; museology;  school culture.   INVENTARIO Y DIGITALIZACIÓN DEL PATRIMONIO MUSEOLÓGICO DE LA EDUCACIÓN: UN PROYECTO DE PRESERVACIÓN Y VALORIZACIÓN DEL PATRIMONIO EDUCATIVO Resumen En  este texto presentamos el Proyecto Inventario y Digitalización  del Patrimonio  Museológico de la Educación, desarrollado por el Ministerio de la Educación portugués.  Las escuelas que integran el Proyecto poseen   importantes   colecciones de  patrimonio  museológico y   se pretende  realizar  su  inventario,  preservación y   divulgación.  Las instituciones escolares fueron acogiendo muchos objetos a lo largo del tiempo  y se lleva en  cuenta  su  recorrido, dónde se utilizaron  y reutilizaron los materiales. Estos materiales se integran, históricamente, al campo de diversas  disciplinas, teniendo un papel fundamental en la interconexión entre el conocimiento científico y la alquimia a que este conocimiento estuvo sujeto para transformarse en materia de enseñanza. Se establece, de ese modo, la convergencia con las actuales políticas de valorización de la educación y del patrimonio cultural, con investigaciones y organización de museos dedicadas a la escuela, a su patrimonio y memoria en diversos países. Se trata de un movimiento

  13. European astronomers' successes with the Hubble Space Telescope*

    Science.gov (United States)

    1997-02-01

    American opposite number, John Bahcall, prefers to stress those quasar hosts that look like undisturbed galaxies. But the important thing is that we have wonderfully clear pictures to argue about. Quasar theories were mostly pure speculation before we had Hubble." The history of the elements Astronomers at the Hamburger Sternwarte use the Faint Object Spectrograph to analyse ultraviolet light from distant quasars, which they also examine by visible light from the ground. They trace the origin, through cosmic time, of elements like carbon, silicon and iron, from which planets and living things can be built. On its way to Hubble, the quasar light passes through various intervening galaxies and gas clouds, like the skewer of a kebab. Each object visited absorbs some of the quasar light, depending on the local abundances of the elements. As they detect more and more objects, Dieter Reimers and his colleagues form an impression of galaxies building up their stocks of elements progressively through time, by the alchemy of successive generations of stars. Apart from primordial hydrogen the second lightest element, helium, has also been abundant since the origin of the Universe. The first major discovery after Hubble's last refurbishment came from Peter Jakobsen of ESA's Space Science Department at Noordwijk, who detected ionized helium in the remote Universe, by the light of a very distant quasar, 0302-003. That was in January 1994, and since then Jakobsen has looked for the ionized helium using other quasars. He now suspects that this helium is nearly all gathered in clumps, rather than scattered freely through intergalactic space. If so, it greatly increases the estimates of the total mass of ordinary matter in the Universe. Through a lens to the early Universe Natural lenses scattered through the cosmos reveal distant galaxies, and make an astronomical tool for Richard Ellis of the Institute of Astronomy, Cambridge (UK). The strong gravity of an intervening cluster of galaxies