999 resultados para Petrus de Bruis, d. ca. 1126


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L’objectiu del treball és estudiar la portabilitat dels programes que han estat originalment dissenyats per a un PC a un dispositiu mòbil, en concret a un PDA amb el sistema operatiu Palm OS. Per al nostre treball, hem escollit una aplicació com a cas €™estudi que ens permet donar solucions a les limitacions que presenta el dispositiu amb Palm OS. Aquesta aplicació s’anomena ScummVM, i es tracta €™una implementació de codi lliure del conegut motor de videojocs SCUMM, creat i utilitzat per LucasArts en les seves aventures gràfiques. Donarem possibles solucions a la problemàtica que genera el fet que la pantalla del dispositiu mòbil utilitzat tingui una resolució de 160x160 a l’hora de mostrar imatges i textos renderitzats per una resolució superior. També solucionarem el problema que representa el fet de no tenir ratolí, ni altres dispositius €™entrada i sortida tradicionals. La intenció és explicar també el procés que s’hauria de seguir per poder portar aplicacions de PC a Palm OS i les eines que s’utilitzarien. Tot això es farà sempre de la manera menys invasiva possible, és a dir, els canvis al codi font de l’aplicació original seran els mínims per garantir el correcte funcionament del programa en la nova plataforma

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El projecte desenvolupat ha tractat l’estudi i disseny €™un motor 3D interactiu a la consola Game Boy Advance (GBA). La GBA disposa €™un processador ARM7TDMI a 16’78 Mhz i no disposa de operacions 3D per-hardware, és una consola lenta en comparació les que podem trobar al mercat €™avui en dia. Aquest treball, va partir de la construcció €™un prototipus ray-casting per-columna. Després, vàrem adaptar-lo a una estructura de portals i sectors. Més tard, es va introduir el mapeig de sostre/terra i de paisatges. Per últim, vàrem introduir efectes a la renderització per donar més realisme al recorregut del món, com il·luminació, objectes, etc. Tot i que es va estudiar l’arquitectura €™un motor eficient, no es tenia prou per arribar a tenir un motor interactiu. Una de les tasques més difícils va ser la part de optimització. Per aconseguir-ho s’ha hagut de substituir operacions a temps real costoses a temps de execució, replantejar parts de l’algorisme per fer-lo més eficient, entre altres

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El processament de dades car­aques és, sinó el que més, un dels més complexes de tractar. El problema principal és que a diferència €™altres parts de l’organisme, el cor del pacient està en moviment continu. Aquest moviment queda representat en les imatges generades pels aparells de captació en forma de soroll. Aquest soroll no només dificulta la detecció de les patologies per part dels cardiòlegs i els especialistes sinó que també en moltes ocasions limita l’aplicació de certes tècniques i mètodes. Així per exemple, l’aplicació de mètodes de visualització 3D (mètodes que permeten generar una representació 3D €™un òrgan) que poden aplicar-se fàcilment en visualització de dades del cervell no són aplicables sobre dades de cor. El Grup €™Informàtica Gràfica de la Universitat de Girona, juntament amb l’Institut de Diagnòstic per la Imatge (IDI) de l'hospital Dr. Josep Trueta, està col·laborant en el desenvolupament de noves eines informàtiques que donin suport al diagnòstic. Una de les prioritats actuals de l'IDI és el tractament de malalties car­aques. Es disposa €™una plataforma anomenada Starviewer que integra les operacions bàsiques de manipulació i visualització de dades mèdiques. L’objectiu €™aquest projecte és el de desenvolupar i integrar en la plataforma Starviewer els mòduls necessaris per poder tractar, manipular i visualitzar dades car­aques provinents de ressònancies magnètiques

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The doctoral thesis was an study about Miquel Mai, a polític, jurist, bibliophile and art collector in Barcelona in the first half of the XVI century. The thesis presents the figure of Miquel Mai by his biographic history, with emphasis in the principals chapters that he was participant. After, there was a chapter whose principal theme its the connection between Miquel Mai and the Erasmism movement. Third, it was an analysis of all the art objects that Miquel Mai accumulates. Fourth, the thesis explores the library (formed by more than 2000 books). And finally, we studied the relationship between the art objects who decorate the library and the same books that was in the library.

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Polska zrobiÅ‚a w obszarze reform w latach 2009-2011 pierwsze kroki w kierunku, na który patrzymy bardzo życzliwie. Jednak pierwsze kroki wymagajÄ… kroków kolejnych – bardziej stanowczych i bardziej skoordynowanych, opartych na fundamencie zmian już wprowadzanych w życie – którym bÄ™dzie towarzyszyć przekonujÄ…ca wizja przyszÅ‚oÅ›ci, a także adekwatne do skali przewidywanych zmian publiczne nakÅ‚ady finansowe. Wizja jest niezbÄ™dna. Wspólnota akademicka, a przede wszystkim jej najmÅ‚odsze pokolenie, musi wiedzieć, na jakich podstawach ma budować swojÄ… akademickÄ… przyszÅ‚ość i czy jest w stanie siÄ™ w niej odnaleźć. Warto jasno powiedzieć, że z czasem pojawi siÄ™ bardziej zróżnicowany system instytucji szkolnictwa wyższego, o różnych możliwoÅ›ciach i różnych zadaniach w różnych miejscach, realizujÄ…cych różne misje i oferujÄ…cych różne możliwoÅ›ci awansowe i finansowe. Warto powiedzieć, że niezbÄ™dne – ale i możliwe – bÄ™… pionowe migracje w ramach różnicujÄ…cego siÄ™ systemu w zależnoÅ›ci od indywidualnych zdolnoÅ›ci, umiejÄ™tnoÅ›ci, pracowitoÅ›ci, a przede wszystkim mierzalnych osiÄ…gnięć naukowych. Należy także przypomnieć, że profesja akademicka nie daje równych szans wszystkim, ponieważ talenty naukowe w ramach wspólnoty akademickiej nie rozkÅ‚adajÄ… siÄ™ równo, ale z pewnoÅ›ciÄ… daje duże szanse najzdolniejszym; że w najlepszych oÅ›rodkach naukowy wymiar kariery akademickiej, tak jak w Å›wiecie zachodnim, jest najważniejszy, a wszystkie pozostaÅ‚e sÄ… tylko jego tÅ‚em; że z czasem wzorce pracy akademickiej i wzorce akademickich zarobków – w wybranych miejscach i dla wybranych grup badaczy – bÄ™… przypominać wzorce znane z najlepszych systemów zachodnich; i wreszcie, że w tych wybranych miejscach (zwanych uniwersytetami badawczymi czy flagowymi) uprawianie nauki nie bÄ™dzie jednostkowym, częściowo niezrozumiaÅ‚ym i częściowo jedynie tolerowanym, hobby.

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Understanding source-sink dynamics of game birds is essential to harvest and habitat management but acquiring this information is often logistically and financially challenging using traditional methods of population surveys and banding studies. This is especially true for species such as the American Black Duck (Anas rubripes), which have low breeding densities and extensive breeding ranges that necessitate extensive surveys and banding programs across eastern North America. Despite this effort, the contribution of birds fledged from various landscapes and habitat types within specific breeding ranges to regional harvest is largely unknown but remains an important consideration in adaptive harvest management and targeted habitat conservation strategies. We investigated if stable isotope (δD, δ13C, δ15N) could augment our present understanding of connectivity between breeding and harvest areas and so provide information relevant to the two main management strategies for black ducks, harvest and habitat management. We obtained specimens from 200 hatch-year Black Duck wings submitted to the Canadian Wildlife Service Species Composition Survey. Samples were obtained from birds harvested in Western, Central, and Eastern breeding/harvest subregions to provide a sample representative of the range and harvest rate of birds harvested in Canada. We sampled only hatch-year birds to provide an unambiguous and direct link between production and harvest areas. Marine origins were assigned to 12%, 7%, and 5% of birds harvested in the Eastern, Central, and Western subregions, respectively. In contrast, 32%, 9%, and 5% of birds were assigned, respectively, to agricultural origins. All remaining birds were assigned to nonagricultural origins. We portrayed probability of origin using a combination of Bayesian statistical and GIS methods. Placement of most eastern birds was western Nova Scotia, eastern New Brunswick, Prince Edward Island, and southern Newfoundland. Agricultural birds from the Central region were consistent with the Saguenay region of Québec and the eastern claybelt with nonagricultural birds originating in the boreal. Western nonagricultural birds were associated with broad boreal origins from southern James Bay to Lake of the Woods and east to Cochrane, Ontario. Our work shows that the geographic origins, landscape, and habitat associations of hatch-year Black Ducks can be inferred using this technique and we recommend that a broad-scale isotopic study using a large sample of Canadian and US harvested birds be implemented to provide a continental perspective of source-sink population dynamics.

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Background and Aims Leafy vegetable Brassica crops are an important source of dietary calcium (Ca) and magnesium (Mg) and represent potential targets for increasing leaf Ca and Mg concentrations through agronomy or breeding. Although the internal distribution of Ca and Mg within leaves affects the accumulation of these elements, such data are not available for Brassica. The aim of this study was to characterize the internal distribution of Ca and Mg in the leaves of a vegetable Brassica and to determine the effects of altered exogenous Ca and Mg supply on this distribution. Methods Brassica rapa ssp. trilocularis ‘R-o-18’ was grown at four different Ca:Mg treatments for 21 d in a controlled environment. Concentrations of Ca and Mg were determined in fully expanded leaves using inductively coupled plasma-mass spectrometry (ICP-MS). Internal distributions of Ca and Mg were determined in transverse leaf sections at the base and apex of leaves using energy-dispersive X-ray spectroscopy (EDS) with cryo-scanning electron microscopy (cryo-SEM). Key Results Leaf Ca and Mg concentrations were greatest in palisade and spongy mesophyll cells, respectively, although this was dependent on exogenous supply. Calcium accumulation in palisade mesophyll cells was enhanced slightly under high Mg supply; in contrast, Mg accumulation in spongy mesophyll cells was not affected by Ca supply. Conclusions The results are consistent with Arabidopsis thaliana and other Brassicaceae, providing phenotypic evidence that conserved mechanisms regulate leaf Ca and Mg distribution at a cellular scale. The future study of Arabidopsis gene orthologues in mutants of this reference B. rapa genotype will improve our understanding of Ca and Mg homeostasis in plants and may provide a model-to-crop translation pathway for targeted breeding.

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We report an atomic resolution X-ray crystal structure containing both enantiomers of rac-[Ru(phen)2dppz]2+ with the d-(ATGCAT)2 DNA duplex (phen = phenanthroline; dppz = dipyridophenazine). The first example of any enantiomeric pair crystallized with a DNA duplex shows different orientations of the Λ and Δ binding sites, separated by a clearly defined structured water monolayer. Job plots show that the same species is present in solution. Each enantiomer is bound at a TG/CA step and shows intercalation from the minor groove. One water molecule is directly located on one phenazine N atom in the Δ-enantiomer only.

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Lead calcium titanate (Pb(1-x)Ca(x)TiO(3) or PCT) thin films have been thermally treated under different oxygen pressures, 10, 40 and 80 bar, by using the so-called chemical solution deposition method. The structural, morphological, dielectric and ferroelectric properties were characterized by x-ray diffraction, FT-infrared and Raman spectroscopy, atomic force microscopy and polarization-electric-field hysteresis loop measurements. By annealing at a controlled pressure of around 10 and 40 bar, well-crystallized PCT thin films were successfully prepared. For the sample submitted to 80 bar, the x-ray diffraction, Fourier transformed-infrared and Raman data indicated deviation from the tetragonal symmetry. The most interesting feature in the Raman spectra is the occurrence of intense vibrational modes at frequencies of around 747 and 820 cm(-1), whose presence depends strongly on the amount of the pyrochlore phase. In addition, the Raman spectrum indicates the presence of symmetry-breaking disorder, which would be expected for an amorphous (disorder) and mixed pyrochlore-perovskite phase. During the high-pressure annealing process, the crystallinity and the grain size of the annealed film decreased. This process effectively suppressed both the dielectric and ferroelectric behaviour. Ferroelectric hysteresis loop measurements performed on these PCT films exhibited a clear decrease in the remanent polarization with increasing oxygen pressure.