77,187 research outputs found
Lippmann photography
No full text45 s. :obr., tab., grafy +CD ROMPřed více než sto lety Gabriel Lippmann zaznamenal první stabilní barevnou fotografii. Jeho technika je založena na záznamu struktur interferenčního obrazce v emulzi. Tímto způsobem lze dosáhnout jedinečné barevné fotografie nazývané Lippmannova fotografie. Práce se zabývá teoretickým popisem Lippmannovy fotografie i jejím praktickým zhotovením
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Libertad en condiciones. A vueltas con Dewey y Lippmann
No full textWe propose a reconsideration of John Dewey’s criticisms of Walter Lippmann’s ideas taking as guiding theme the arguments put forward in the successive reviews that Dewey wrote on Lippmann’s works. We maintain that the ideas that Dewey launched in these reviews (as well as in The Public and its Problems, 1927) pointed in a direction that became more explicit in the 1930s, when Dewey responded with socialist discourse to a Lippmann who appealed to something more that the authority of trained experts to counteract the drifts of democracy. According to our view, the debate they held not only revealed two visions of the relationship between democracy and popular will, but also two discrepant conceptions about the economic bases of an open society and the necessary conditions for freedom exercise.El presente ensayo reconsidera las críticas de John Dewey a Walter Lippmann tomando como eje los argumentos esgrimidos en las sucesivas reseñas que Dewey fue haciendo de las obras de Lippmann. Se sostiene que las críticas que Dewey lanzó en estas reseñas, así como luego en The Public and its Problems (1927) ya apuntaban en una dirección que quedó más explícita en los años treinta, cuando Dewey respondió con lenguaje socialista a un Lippmann que apelaba a algo más que a la autoridad de expertos para contrarrestar las derivas de la democracia. En el debate que mantuvieron, no solo se pusieron en juego dos visiones de la relación entre democracia y voluntad popular, sino dos concepciones discrepantes sobre las bases económicas de una sociedad abierta y las condiciones necesarias para el ejercicio de la libertad
Public as Phantom and Public in Eclipse. How is a Controversy between Walter Lippmann and John Dewey on Democracy and Media Still Relevant after almost Hundred Years
No full textDok novinar i društveni teoretičar Walter Lippmann sredinom dvadesetih godina prošlog stoljeća upozorava kako ne postoji suvereni i informirani građanin kao element odlučivanja u predstavničkoj demokraciji, dakle da ne postoji niti javnost kao konzistentna i trajna društvena kategorija, već da je ona ‘fantom’, filozof John Dewey mu odgovara kako javnost nije ‘fantomska’, već je u svojevrsnoj ‘pomrčini’, a da se demokratske procese može osnažiti jačanjem lokalne zajednice i drugačijom ulogom medija, koji će kvalitetnom obradom i medijskim plasmanom znanstvenih otkrića i društvenih istraživanja vratiti građaninu i javnosti mjesto i ulogu koji mu u demokratskoj tradiciji pripadaju. Problem na koji je Lippmann među prvima upozorio nije razriješen niti do danas, a Deweyjeve sugestije mogu u novom kontekstu pripomoći njegovom razrješavanju.While Walter Lippmann in 1920’s warns that there is no such thing as sovereign and omnicompetent citizen in representative democracy, which also means that there is nothing like consistent and durable public (‘public is a mere phantom’, says Lippmann), John Dewey replies that public is not a phantom but it’s ‘in eclipse’. He suggests that democratic processes can be strengthened by strengthening local community and by different role of the media. Media can reestablish the role and function of citizen and public as they are settled in democratic tradition by different and better publishing results of scientific and social researches. Problem that Lippmann pointed out is still not resolved, but some suggestions Dewey gave – in a new context – can be of help
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Absorbing new subjects: holography as an analog of photography
No full textI discuss the early history of holography and explore how perceptions, applications, and forecasts of the subject were shaped by prior experience. I focus on the work of Dennis Gabor (1900–1979) in England,Yury N. Denisyuk (b. 1924) in the Soviet Union, and Emmett N. Leith (1927–2005) and Juris Upatnieks (b. 1936) in the United States. I show that the evolution of holography was simultaneously promoted and constrained by its identification as an analog of photography, an association that influenced its assessment by successive audiences of practitioners, entrepreneurs, and consumers. One consequence is that holography can be seen as an example of a modern technical subject that has been shaped by cultural influences more powerfully than generally appreciated.
Conversely, the understanding of this new science and technology in terms of an older one helps
to explain why the cultural effects of holography have been more muted than anticipated by forecasters
between the 1960s and 1990s
Long-term wind-driven X-ray spectral variability of NGC 1365 with Swift
No full textWe present long-term (months–years) X-ray spectral variability of the Seyfert 1.8 galaxy NGC 1365 as observed by Swift, which provides well-sampled observations over a much longer time-scale (six years) and a much larger flux range than is afforded by other observatories. At very low luminosities, the spectrum is very soft, becoming rapidly harder as the luminosity increases and then, above a particular luminosity, softening again. At a given flux level, the scatter in hardness ratio is not very large, meaning that the spectral shape is largely determined by the luminosity. The spectra were therefore summed in luminosity bins and fitted with a variety of models. The best-fitting model consists of two power laws, one unabsorbed and another, more luminous, which is absorbed. In this model, we find a range of intrinsic 0.5–10.0 keV luminosities of approximately 1.1–3.5 erg s?1, and a very large range of absorbing columns, of approximately 1022–1024 cm?2. Interestingly, we find that the absorbing column decreases with increasing luminosity, but that this result is not due to changes in ionization. We suggest that these observations might be interpreted in terms of a wind model in which the launch radius varies as a function of ionizing flux and disc temperature and therefore moves out with increasing accretion rate, i.e. increasing X-ray luminosity. Thus, depending on the inclination angle of the disc relative to the observer, the absorbing column may decrease as the accretion rate goes up. The weaker, unabsorbed, component may be a scattered component from the wind
A simple synthetic entryway into (N-heterocyclic carbene)gold-steroidyl complexes and their anticancer activity
No full textA straightforward synthetic route to new N-heterocyclic carbene (NHC)-gold-steroidyl complexes is reported. The desired complexes were obtained using a weak base (such as K2CO3) through a concerted-metallation-deprotonation (CMD) reaction mechanism occurring between [Au(NHC)Cl] and ethisterone as a model steroid-based alkyne. Most complexes displayed good cytotoxicity against a panel of cancer cell lines with IC50 values in the low micromolar range. Cellular uptake of the most active complex 2a into MCF-7 breast cancer cells was facilitated by the coordinated ethisterone ligand
54.5 Tb/s WDM Transmission over Field Deployed Fiber Enabled by Neural Network-Based Digital Pre-Distortion
No full textWe demonstrate a record 54.5 Tb/s WDM transmission at 11.35 bit/s/Hz over 48 km of field-deployed SMF connecting business and academic parks enabled by a novel joint I-Q Neural Network-based transmitter digital pre-distortion technique.Accepted Author ManuscriptTeam Sander Wahl
The educational ideas of Walter Lippmann
No full textMaster of EducationWalter Lippmann was primarily not an educationalist but a political commentator and a writer of books on questions of political philosophy raised by the processes of American and international politics. His thought on education emerged from his deliberations and must be seen in their context.
His writing career of over fifty years may be seen in terms of an evolving response to what he called "the acids of modernity". By this he meant the dissolution of the old traditional order, the rejection of the ideas of social and political hierarchy, the sacred authority of institutions, and out of this the development of more democratic, secular and human institutions and relationships. Prior to World War I he enthusiastically endorsed this process, but the experience of the War deeply affected his assumptions about the nature of man and ease with which society could be reshaped for the better. At first he attributed the malaise he saw to the inability of the people to gain access to the facts necessary for effective government. He moved on from this, in A Preface to Morals, to examine the basis for a morality which would enable the orderly functioning of a democratic society. During the 1930s he was mainly concerned with the economic issues of the New Deal, but in The Good Society he articulated what he saw to be the foundation stone of a democratic order - the rule of law based upon an appreciation of the essential dignity and inviolability of man.
It seems clear from his writings that the fundamental issues which he raised were ontological in nature. However, because Lippmann was primarily concerned with sustaining the conditions of civility and freedom without returning to the belief systems which inspired them, he did not face the issue squarely. He developed a "civic theology" in The Public Philosophy having the show of truth necessary to sustain a political order rather than answers to the questions of the nature of truth and reality.
The same evolution from optimistic progressivism to apprehensive conservatism is evident in Lippmann' s educational thought. Initially he argued that there were no fixed bodies of knowledge which should be passed on. Instead the curriculum should be shaped by the child's own needs and interests. But as he became pessimistic concerning the essential goodness of man and saw that the traditions of freedom and civility were being threatened, he trenchantly criticised the progressive movement for its failure to pass on the essential western culture through the assumptions, ideas, values and methods of the academic disciplines.
Lippmann' s chief contribution was that he raised the central issues, but the value of his answers was weakened by his failure to face squarely the questions of the nature of reality and truth and how a free society could be based on that truth
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