196,081 research outputs found
¿Importa la ley?: la respuesta de un juez al movimiento de la escuela crítica del Derecho
No full textFil: Rubin, Alvin B. Louisiana State University. Paul M. Hebert Law Center. Baton Rouge, Estados Unidos"Publicado originalmente en inglés como Rubin, Alvin, Does Law. A Judge's Response to the Critical Legal Studies Movement. Los editores agradecen al editor el permiso para traducirlo y publicarlo en esta revista. Traducción al español realizada por Cecilia Garibotti, estudiante de la Facultad de Derecho de la UBA.
Microheterogeneity of odorant-binding proteins in the porcupine revealed by N-terminal sequencing and mass spectrometry.
No full textMULTIPLE TYPES AND FORMS OF ODORANT-BINDING PROTEINS IN THE OLD-WORLD PORCUPINE HYSTRIX-CRISTATA
No full text1. Eight new proteins have been identified and purified from the nasal tissue of the old-world porcupine. 2. All of them show good binding activity to tritiated 2-isobutyl-3-methoxypyrazine. 3. They show values of molecular mass, in denaturing conditions, between 18 and 23 kDa, and of isoelectric points between 4.2 and 4.6. 4. This represents the first example of more than two odorant-binding proteins (OBPs) found in the same animal species and could support a discriminating function of these proteins in the process of odour perception
Rappresentazione stereoscopica tridimensionale perfezionata di oggetti virtuali per un osservatore in movimento
No full textImproved three-dimensional stereoscopic rendering of virtual objects for a moving observer
No full textPORCINE VEG PROTEINS AND TEAR PREALBUMINS
No full textSmall soluble proteins, belonging to the lipocalin family are secreted in large amounts by tongue von Ebner's glands and lachrymal glands. In humans, the lingual protein, called VEG, and the lachrymal protein, called tear prealbumin, have shown identical cDNA sequences. In the pig, we have purified homodimeric proteins with subunits of 17 kDa, both from von Ebner's glands and from lachrymal glands. In both cases, the proteins can be resolved into two isoforms on a chromatofocusing column. Partial aminoacid sequences and full cDNA sequences have been obtained for the more abundant forms purified from both tissues. The two proteins appear to be identical, as in humans. The reason why the same protein is expressed in different tissues, as well as its physiological function, still remain to be clarified
Three odorant-binding proteins from rabbit nasal mucosa
No full textFollowing the purification of an odorant-binding protein (OBP) from rabbit nasal mucosa, we have identified, purified and partially characterized two additional OBPs from the nasal tissue of the same animal species. OBP-II is a monomer of 21 kDa and isoelectric point 4.2; OBP-III is a dimer with subunits of 23 kDa and isoelectric point 4.8. Like OBP-I, both these new members bind the odorant 2-isobutyl-3-methoxypyrazine. The partial amino acid sequences of the three OBPs, determined by Edman degradation, confirm that they are members of the OBP family, but reveal poor similarity between them. However, higher similarity is found between each OBP and other members of the lipocalin family In particular, OBP-I is most similar to bovine OBP (55% identity in the N-terminal region), OBP-II is >50% identical, limited to its first 18 amino acids, to mouse OBP-I and porcupine OBP-II, while OBP-II shares 26 out of the first 40 amino acids with major urinary protein (MUP) 4, a member of the mouse salivary proteins. The possible role of these proteins in olfactory transduction is also discussed
A stereoscopic augmented reality system for the veridical perception of the 3D scene layout
No full textThe recent diffusion of the stereoscopic 3D technologies has yielded the development of affordable and of everyday use devices for the visualization of such information. This has paved the way for powerful human and computer interaction systems based on augmented reality environment where humans can interact with both virtual and real tools. However, an observer freely moving in front of a 3D display could experience a misperception of the depth and of the shape of virtual objects. Such distortions can have serious consequences in scientific and medical fields, where a veridical perception is required, and they can cause visual fatigue in consumer and entertainment applications. Here, we propose a novel augmented reality system capable to correctly render 3D virtual objects, without adding significant delay, to an observer that changes his position in the real world and acts in the virtual scenario. The correct perception of the scene layout is assessed through two experimental sessions with several observers
Veridical Perception of 3D Objects in a Dynamic Stereoscopic Augmented Reality System
No full textAugmented reality environments, where humans can interact with both virtual and real objects, are a powerful tool to achieve a natural human-computer interaction. The recent diffusion of off-the-shelf stereoscopic visualization displays and motion capture devices has paved the way for the development of effective augmented reality systems at affordable costs. However, with the conventional approaches an user freely moving in front of a 3D display could experience a misperception of the 3D position and of the shape of virtual objects. Such distortions can have serious consequences in scientific and medical fields, where a veridical perception is required, and they can cause visual fatigue in consumer and entertainment applications. In this paper, we develop an augmented reality system, based on a novel stereoscopic rendering technique, capable to correctly render 3D virtual objects to an user that changes his/her position in the real world and acts in the virtual scenario. The proposed rendering technique has been tested in a static and in a dynamic augmented reality scenario by several observers. The obtained results confirm the improvement of the developed solution with respect to the standard systems. © Springer-Verlag Berlin Heidelberg 2013
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