2,839 research outputs found
Rhinolophus adami Aellen and Brosset 1968
No full textRhinolophus adami Aellen and Brosset, 1968. Rev. Suisse Zool., 75:443. TYPE LOCALITY: Congo Republic, Kouilou. DISTRIBUTION: Congo Republic.Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 163, DOI: 10.5281/zenodo.735306
Os significados e representações atribuídos aos cursos d'agua da bacia do Rio Criciúma (SC) desde 1880 até 2009 e suas influências na configuração da paisagem
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em Geografia, Florianópolis, 2010O trabalho tem por objetivo compreender como foram construídos os significados atribuídos aos cursos d'água nas diferentes fases do processo de ocupação das terras da bacia do rio Criciúma (SC), desde o processo de colonização em 1880 até os dias atuais. O significado dos objetos norteia a relação dos indivíduos entre si e com seu meio. No caso estudado, a relação de diferentes grupos sociais que ocuparam a bacia do rio Criciúma ao longo do tempo depende do significado atribuído a este recurso, o que reflete nas formas de apropriação dos rios. O significado é uma construção mental acerca de um objeto e essa construção depende de valores, percepções, experiências e são abstratos. Quando há tentativa de comunicá-lo, perde-se alguma parte do seu conteúdo. A sua expressão dá-se por meio de diferentes linguagens, que na realidade representam este significado. As formas de apropriação do rio são também representações de significados atribuídos pelos grupos sociais apropriadores a este elemento da paisagem. A partir dos conceitos e abordagens da Geografia Cultural, faz-se um estudo das representações, incluindo as formas de apropriação, em diferentes contextos sócio-econômicos culturais pelas quais passou o processo de ocupação humana da bacia. Para compreender os significados e suas representações foram pesquisadas diferentes linguagens a partir de entrevistas, pesquisas bibliográficas, fotografias, mapas, leis e normas municipais. Três períodos históricos foram identificados durante o processo de ocupação da bacia, com distintas formas de apropriação dos cursos d'água. O primeiro período vai da colonização até 1930, quando as atividades econômicas predominantes eram a agricultura, o comércio e as pequenas manufaturas. Nessa época, o rio era um elemento referencial para as pessoas, pois se constituía no eixo norteador do processo de colonização e do traçado urbano, gerador de força motriz para os engenhos e atafonas e para abastecimento de água potável. No segundo período, de 1930 até 1950, a principal atividade econômica era a exploração de carvão, que utilizava o rio para a lavagem ou beneficiamento do desse mineral, drenagem das áreas ácidas, com consequente contaminação, assoreamento por deposição de material fino do carvão e desvios dos cursos d'água. Associada à mineração, houve a vinda de um contingente populacional acentuado para o município, e essas pessoas não tinham o rio Criciúma e seus afluentes como uma referência dos seus espaços vividos. Por isso, não havia problema em contaminá-lo com esgotos domésticos, mesmo aqueles que não estavam contaminados com carvão. O rio Criciúma passa a ter um significado negativo de sujo e mau cheiroso, por causa da apropriação para o despejo de efluentes do carvão, esgotos domésticos e resíduos sólidos. O terceiro período ocorre a partir de 1950, a bacia começa a ser intensamente urbanizada e, no final dos anos de 1960, inicia o processo de verticalização no alto e médio vale do rio Criciúma. Muitos trechos do rio e seus afluentes foram canalizados com contenção de margem e fundo e alguns até recobertos para a apropriação do espaço dos seus leitos e para resolver os problemas do cheiro exalado e das inundações. Partes dos rios desapareceram da paisagem da bacia por causa das canalizações e recobrimentos e passaram a não ter significado, pois não existem aos olhos de muitos moradores. Contudo, nos momentos de precipitações elevadas, o rio volta a se mostrar em forma de inundações, gerando na população uma sensação de medo. Nesses períodos o rio Criciúma e seus afluentes têm um significado para população, mas este significado esta ligado a sentimentos ruins. Conclui-se que, em cada período identificado, o rio Criciúma como elemento da paisagem recebeu distintos significados, traduzidos pelas representações, os quais são materializados por diferentes formas de apropriação
Mechanic and elastic properties of F-actin
No full textThe mechanic and elastic properties of F-actin were extensively investigated, but, surprising, no attention was paid to the influence of critical concentration on tensile strength. Formally, the critical concentration is the main determinant of the free energy of the monomer-monomer interaction, thus of tensile strength. We have investigated this aspect, the influence of critical concentration on tensile strength, by stretching rhodamnine phalloidin actin filaments by a laser trap. We found that by increasing ionic strength from 3 to 19 mM, critical concentration decreased fron 146 to 36 nM and the yield strength increased from 5.6 to 28.6 pN. At the ionic strength of 12-13 mM, the elastic modulus increased by 330-430 kP/nm up to break point, were it was 38-44.2 MP. Our finding poses the question of how actin filament bears the forces, ie how thin filament supports muscle contraction
Differential response of fast and slow myosin ATPase from skeletal muscle to F-actin and to phalloidin F-actin
No full textFast muscle myosin responds in similar way to F-actin and to phalloidin F-actin. It is activated 7.5 fold at infinite F-actin concentration and 6.8 fold at infinite phalloidin F-actin. The actomyosin dissociation constants are 0.89 +/- 0.34 microM with F-actin and 0.90 +/- 0.71 microM with phalloidin F-actin. Slow muscle myosin responds differently to F-actin and to phalloidin F-actin. It is activated 3.76 fold at infinite F-actin concentration and only 2.27 fold at infinite phalloidin F-actin concentration. The actomyosin dissociation constants are 1.95 +/- 1.27 microM with F-actin and 0.27 +/- 0.16 microM with phalloidin F-actin. At first glance this means that substitution of F-actin with phalloidin F-actin magnifies the difference between fast muscle and slow muscle myosins. Furthermore the change of the dissociation constants may affect the contractile force of the attached crossbridge
Ara solitauriliorum
No full textNomine supradicti Seminarij offerebat F. Adamus Adami, eiusdem pro tempore Alumnus, Monasterij Brauvveilerensis professusVerfasser auf der letzten Seite genanntTiteleinfassungAus dem Vorbesitz des Klosters Rheinau Exemplar der ZB Züric
Disputatio continens Prooemium Civil. Sapientiae / Quam ... Sub praesidio ... Dn. Theodori Adami[i] ... Publicae disquisitioni subiicit Johannes Cellarius F. Norimbergensis. Habebitur ... 8. Cal. Sextil. ...
No full textAffordances and practices: The case of YouTube video responses
No full textThe introduction of the Video Responses functionality in YouTube in March 2006 paved the way for video interaction, a new type of interaction, in which videos respond to other videos. A previous work (Adami, 2010) analysed the results of a 14-month period of monitoring of the Most Responded Videos chart, categorized the videos with the largest number of responses over the period and investigated the main video interaction practices by examining a sample video-thread for each typology. Drawing on this work, the present paper discusses selected examples of video exchanges that illustrate non-deterministic and recursive interaction between the affordances of the Video Responses option and the ways in which these are actualized by sign-making practices. The range of possible video interaction practices is determined by the set of affordances (Kress, van Leeuwen, 2006), what the Responses option enables/encourages interactants to do or prevents/discourages them from doing, both materially and socially. Within this range of possibilities, participants exploit affordances in unexpected ways, according to their diversified and
sometimes conflicting interests. When institutionalized, these innovative practices lead to structural changes in the affordances themselves, in much the same way as Saussurean acts of parole bring about innovations in langue (Saussure, 1916/1931). As with language here, too, any innovative act of sign-making that becomes socially established is the result of the dominance (both in frequency and prestige) of a specific practice from among the set of many existing and conflicting practices. Eventually, some norms become institutionalized; this depends on sociocultural, as well as material, factors and forces; the cause-effect relationship is never deterministic; it cannot be predicted beforehand but only explained retrospectively. Once institutionalized, the innovation in
its turn paves the way for further creative and unexpected uses of the system’s renewed possibilities. Analysis of the patterns of relatedness in the video exchanges arising from this interrelationship, indicates that creative uses of the affordances lead to acceptability of exchanges which disregard traditional standards of coherence. As we shall see from what follows, far from giving rise to communicative failure, exchanges that disregard interlocutors’ intended meanings bring about video interaction successfully. Since video interaction shares its affordances with all other online semiotic spaces and digital forms
of text production, the practices observed here may well be indicative of broader phenomena characterizing communication in digital environments
Comparative analysis of different endovascular modalities to treat splenic artery aneurysms
No full textBACKGROUND: Endovascular treatment of splenic artery aneurysms (SAAs) is widely applied in the current clinical practice. The aim of this paper was to describe our single center experience on endovascular treatment of SAAs, comparing the outcomes obtained with two different METHODS: Between January 2010 and December 2021, 35 patients with certain diagnosis of non-ruptured SAA were admitted to our center. Twenty-eight patients treated with packing or sandwich techniques were included in the study analysis. Primary outcome measures analyzed were 30-day mortality and mean hospital stay. Secondary outcome measures analyzed were freedom from splenectomy, and the rate of postembolization syndrome. Chi-square test was used to compare the two endovascular techniques. Statistical significance was defined as P value <0.05. RESULTS: The mean age was 56.5 +/- 12.8 years. Most of patients were females (22, 78.6%). Eighteen patients underwent sandwich technique (Group A), and the remaining 10 packing technique (Group B). Technical success was 100%. Intraoperative and 30-day mortality were 0 in both groups. Mean hospital stay was 4.2 +/- 4.0 days in Group A, and 2.3 +/- 3.9 days in Group B (P=0.93). Postembolization syndrome occurred in 9 cases (50%) in Group A, and in 4 cases (40%) in Group B (P=0.521). Only one patient in Group A (5.5%) required splenectomy (P=0.392). CONCLUSIONS: Packing and sandwich techniques seem to be similarly safe and effective in treating SAAs and have no statistically significant differences in terms of early mortality and morbidity. (Cite this article as: Bertagna G, Troisi N, Torri L, Canovaro F, Tomei F, Adami D, et al. Comparative analysis of different endovascular modalities to treat splenic artery aneurysms. Ital J Vasc Endovasc Surg 2023;30:7-10. DOI: 10.23736/S1824-4777.22.01569-8
Ground States for NLS on Graphs: A Subtle Interplay of Metric and Topology
No full textWe review some recent results on the minimization of the energy associated to the
nonlinear Schrödinger Equation on non-compact graphs. Starting from seminal results given
by the author together with C. Cacciapuoti, D. Finco, and D. Noja for the star graphs, we
illustrate the achiements attained for general graphs and the related methods, developed
in collaboration with E. Serra and P. Tilli. We emphasize ideas and examples rather than
computations or proofs
Differential response of fast and slow myosin ATPase from skeletal muscle to F-actin and to phalloidin F-actin
No full textFast muscle myosin responds in similar way to F-actin and to phalloidin F-actin. It is activated 7.5 fold at infinite F-actin concentration and 6.8 fold at infinite phalloidin F-actin. The actomyosin dissociation constants are 0.89±0.34 μM with F-actin and 0.90±0.71 μM with phalloidin F-actin. Slow muscle myosin responds differently to F-actin and to phalloidin F-actin. It is activated 3.76 fold at infinite F-actin concentration and only 2.27 fold at infinite phalloidin F-actin concentration. The actomyosin dissociation constants are 1.95±1.27 μM with F-actin and 0.27±0.16 μM with phalloidin F-actin. At first glance this means that substitution of F-actin with phalloidin F-actin magnifies the difference between fast muscle and slow muscle myosins. Furthermore the change of the dissociation constants may affect the contractile force of the attached crossbridge. © 2002 Elsevier Science B.V. All rights reserved
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