21,692 research outputs found
Remarks on defective Fano manifolds
No full textThis note continues our previous work on special secant defective (specifically, conic connected and local quadratic entry locus) and dual defective manifolds. These are now well understood, except for the prime Fano ones. Here we add a few remarks on this case, completing the results in our papers (Russo in Math Ann 344:597–617, 2009; Ionescu and Russo in Compos Math 144:949–962, 2008; Ionescu and Russo in J Reine Angew Math 644:145–157, 2010; Ionescu and Russo in Am J Math 135:349–360, 2013; Ionescu and Russo in Math Res Lett 21:1137–1154, 2014); see also the recent book (Russo, On the Geometry of Some Special Projective Varieties, Lecture Notes of the Unione Matematica Italiana, Springer, 2016)
IONESCU-IONESCO, VOIX D’UN EXILÉ ? PROPOSITION D’UNE RELECTURE THÉORIQUE
No full textIonescu-Ionesco, Voice of an Exile? Proposal for a Theoretical Rereading. In this paper, we propose a different reading of Eugène Ionesco’s exile by drawing from a selection of texts from the 1930s and afterwards. As our purpose is to challenge the prevailing discourse surrounding the topic, we have opted to focus on critical and theoretical elements rather than biographical details. We keep in mind that the author’s contributions and the research on his work are two intertwined discourses. In post-1989 Romania, Ionesco is widely regarded as one of the leading literary figures of the Romanian exile. It is our opinion that his exiled status has not been sufficiently investigated, and our aim is to demonstrate that prudence and close reading could uncover some striking nuances that could lead scholars to the solution of a central question: Should Ionescu-Ionesco be regarded as an exile or rather as an expatriate?
Ionescu-Ionesco, vocea unui exilat? Propunere pentru o relectură teoretică. În articolul de față propunem o lectură diferită a exilului lui Eugène Ionesco bazându-ne pe o selecție de texte din anii 1930 și de mai târziu. Întrucât scopul nostru este să chestionăm discursul predominant legat de subiect, am ales să ne concentrăm mai curând asupra elementelor critice și teoretice decât asupra detaliilor biografice. Ținem cont de faptul că contribuțiile autorului și cercetarea relativă la opera sa sunt două discursuri întrețesute. În România de după 1989, Ionesco este îndeobște considerat drept o figură literară marcantă a exilului românesc. Opinia noastră este aceea că statutul său de exilat nu a fost suficient investigat, iar obiectivul nostru este să demonstrăm că prudența și lectura atentă pot dezvălui nuanțe remarcabile: ar trebui Ionescu-Ionesco să fie tratat drept un exilat sau mai degrabă drept un expatriat?
Cuvinte-cheie: Eugen Ionescu – Eugène Ionesco, exil, expatriat, ideologie, receptare
Article history: Received 21 January 2024; Revised 26 March 2024; Accepted 04 June 2024; Available online 25 June 2024; Available print 30 June 202
Rezension zu: Bargetz, Brigitte, Gundula Ludwig und Birgit Sauer (Hrsg.). Gouvernementalität und Geschlecht. Politische Theorie im Anschluss an Michel Foucault. Frankfurt am Main. Campus 2015
No full textRezension zu: Bargetz, Brigitte, Gundula Ludwig und Birgit Sauer (Hrsg.). Gouvernementalität und Geschlecht. Politische Theorie im Anschluss an Michel Foucault. Frankfurt am Main. Campus 2015
No full textProtecting Animals 36: Author Witi Ihimaera
No full textIn this very special episode of Knowing Animals I am joined by beloved New Zealand author Witi Ihimaera. Witi has written many books featuring nonhuman animals. He offers us a non-colonial lens through which to think about the human/nonhuman relationship
I Think I Am Philip K. Dick
No full textFor years, noted writer Laurence A. Rickels often found himself compared to novelist Philip K. Dickthough in fact Rickels had never read any of the science fiction writers work. When he finally read his first Philip K. Dick novel, while researching for his recent book The Devil Notebooks , it prompted a prolonged immersion in Dicks writing as well as a recognition of Rickelss own long-documented intellectual pursuits. The result of this engagement is I Think I Am: Philip K. Dick , a profound thought experiment that charts the wide relevance of the pulp sci-fi author and paranoid visionary. I Think I Am: Philip K. Dick explores the science fiction authors meditations on psychic reality and psychosis, Christian mysticism, Eastern religion, and modern spiritualism. Covering all of Dicks science fiction, Rickels corrects the lack of scholarly interest in the legendary Californian author and, ultimately, makes a compelling case for the philosophical and psychoanalytic significance of Philip K. Dicks popular and influential science fiction.Intro -- Contents -- Introjection -- Part I -- Endopsychic Allegories -- Schreber Guardian -- Belief System Surveillance -- Part II -- Deeper Problems -- Veil of Tears -- Go West -- Dick Manfred -- Timing -- Glimmung -- Part III -- Spiritualism Analogy -- Imitating the Dead -- Indexical Layer -- Ilse -- Hammers and Things -- Crucifictions -- Over There -- Martyrology -- Can't Live, Can't Live -- Lola -- Umwelt, Mitwelt, and Eigenwelt -- Outer Race -- The German Introject -- Part IV -- Materialism, Idealism, and Cybernetics -- Startling Stories -- A Couple of Years -- Android Empathy -- Homunculus and Robot -- ALL OF YOU ARE DEAD. I AM ALIVE. -- Go with the Flow -- Part V -- Room for Thought -- Caduceus -- Jump -- Still -- A Wake -- Spätwerk -- Let the Dead Be -- Play Bally -- Das Hund -- Notes -- BibliographyFor years, noted writer Laurence A. Rickels often found himself compared to novelist Philip K. Dickthough in fact Rickels had never read any of the science fiction writers work. When he finally read his first Philip K. Dick novel, while researching for his recent book The Devil Notebooks , it prompted a prolonged immersion in Dicks writing as well as a recognition of Rickelss own long-documented intellectual pursuits. The result of this engagement is I Think I Am: Philip K. Dick , a profound thought experiment that charts the wide relevance of the pulp sci-fi author and paranoid visionary. I Think I Am: Philip K. Dick explores the science fiction authors meditations on psychic reality and psychosis, Christian mysticism, Eastern religion, and modern spiritualism. Covering all of Dicks science fiction, Rickels corrects the lack of scholarly interest in the legendary Californian author and, ultimately, makes a compelling case for the philosophical and psychoanalytic significance of Philip K. Dicks popular and influential science fiction.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Estudo do efeito salino sobre a hidrolise do p-nitrofeniletilfosfato de litio na presença de micelas a concentrações altas de hidroxido de sodio
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasA hidrólise do p-nitrofeniletilfosfato de lítio (PENEF) foi estudada a 25°C, 35°C e 45°C em soluções aquosas contendo NaOH e micelas de brometo de cetiltrimetilamônio (CTAB) na ausência e presença de NaCl. Usando métodos espectroscópicos foram determinadas constantes de velocidade de pseudo-primeira ordem (ky ) e de segunda ordem (k2) e parâmetros de ativação Ea, DH , DG e DS. A concentração de NaOH variou entre 0,050M e 5,0 M e a concentração de NaCl entre 0,0050M e 0,030M
Formação de micelas de cloreto de cetilpiridinio em soluções aquosas de dimetilsulfoxido, dimetilformamida e dimetilacetamida
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasA formação de micelas de cloreto de cetilpiridinio (CPC1) em soluções aquosas de dimetilsulfóxido (DMSO), dimetilformamida (DMF) e dimetilacetamida (DMA) foi estudada por meio de tensiometria superficial. Foram realizadas determinações de concentração micelar crítica (CMC) a 25° e 40°C e calcularam-se os parâmetros termodinâmicos DGmic°, DHmic°, DSmic°. As determinações foram efetuadas com soluções do surfactante em água pura e soluções aquosas dos cossolventes a várias frações molares (XCOSS)
Formação de micelas de brometo de cetiltrimetilamonio em soluções aquosas de alcoois
No full textDissertação (mestrado) Universidade Federal de Santa Catarina. Centro de Ciencias Fisaicas e MatematicasO processo de micelização do surfactante brometo de cetiltrimetilamônio (CTAB) foi estudado em soluções aquosas de metanol, etanol e isopropanol a 25°C e 40°C por meio de tensiometria superficial. Foram determinados parâmetros termodinâmicos tais como a concentração micelar crítica (CMC), energia livre de micelização (DGmo), entalpia de micelizacão (DHmo) e entropia de micelização (DSmo). A 25°C, no sistema H20 - CTAB - CH3OH a CMC variou de 0,850x10-3M (2% por volume de metanol) a 3,00x10-3M (40% por volume de metanol; para H2O - CTAB - CH3CH2OH variou de 0, 750x10-3M (2, 5% de etanol) a 1,70x10-3M (15% de etanol) e para H20 - CTAB - i-C3H70H variou de 0,800x10-3M (1,5% de isopropanol) a 2, 10x10-3M (9% de isopropanol). A concentração micelar crítica do CTAB em água pura é 0,920x10-3M. A 40°C, a variação da CMC foi de 1,00x10-3M (água pura) a mínimos de 0,920x10-3M (H2O - CTAB - CH3OH, 2% de metanol); 0,850x10-3M (H2O - CTAB - CH3CH2OH, 2,5% de etanol) e 0 ,920x10-3M (H2O - CTAB - i-C3H7OH, 1,5% de isopropanol). Os máximos de CMC observados para CTAB foram 2,80x10-3M (H2O - CH3OH, 35% de metanol); 1,90x10-3 M (H2O - CH3CH2OH, 15% de etanol), 2,40x10-3M (H2O i-C3H7OH, 9% de isopropanol). Os valores experimentais de DGmo determinados a 25°C para CTAB em H2O - CH3OH variaram entre -4,18 kcal/mol (2% de CH3OH) e -3,43 kcal/mo] (40% de CH3OH); para CTAB em H2O - CH3CH2OH de -4,26 kcal/mol (2,5% de CH3CH2OH) a - 3,78 kcal/mol (15% de CH3CH20H); e para CTAB em H2O - i-C3H7OH de -4,22 kcal/mol (1,5% de i-C3H7OH a -3,65 kcal/mol (9% de i-C3H70H). Para CTAB em água pura a 25°C DGmo é -4,14 kcal/mol. Os valores determinados para DHmo para os três sistemas ternários variaram entre -1, 03 kcal/mol e - 2,25kcal/mol. A entropia de micelização a 25°C mostrou um decréscimo gradual entre aproximadamente +10 e +5 u.e.. As propriedades termodinâmicas experimentais sugerem que a concentrações baixas de cossolvente as forças hidrofóbicas são semelhantes em água pura e soluções de água-álcool. A concentrações mais elevadas de álcool as pontes de hidrogênio entre água e cossolvente predominam e efetivamente eliminam as possibilidades de interações hidrofóbicas entre o surfactante e o meio e inibem o processo de micelização
Vortex Dynamics and Pinning in CaKFe4As4 Single Crystals from DC Magnetization Relaxation and AC Susceptibility
No full textAmong various "families" of iron-based superconductors, the quite recently discovered AeAFe(4)As(4) (where Ae is an alkali-earth metal and A is an alkali metal) has high critical current density, a very high upper critical field, and a low anisotropy, and has recently received much interest for the possibility of high magnetic field applications at the liquid hydrogen temperature. We have performed DC magnetization relaxation and frequency-dependent AC susceptibility measurements on high-quality single crystals of CaKFe4As4 with the aim of determining the pinning potential U*. The temperature dependence of U* displays a clear crossover between elastic creep and plastic creep. At temperatures around 27-28 K, U* has a very high value, up to 1200 K, resulting in an infinitesimally small probability of thermally activated flux jumps. From the dependence of the normalized pinning potential on irreversible magnetization, we have determined the creep exponents in the two creep regimes, which are in complete agreement with theoretical models. The estimation of the pinning potential from multifrequency AC susceptibility measurements was possible only near the critical temperature due to equipment limitations, and the resulting value is very close to the one that resulted from the magnetization relaxation data. Magnetic hysteresis loops revealed a second magnetization peak and very high values of the critical current density
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