235 research outputs found
Modeling Luminance Contrast Orientation Illusions
Luminance contrast orientation illusions are illusions of tilt
whose presence or absence depends on the luminance values
of some elements of their configurations. A simple model is
presented which can account for a number of illusions of this
type. Its basic feature is that the neural distributions
corresponding to illusory tilt are similar to neural
distributions induced by actually tilted stimuli
Izbor cementa za fiksiranje nadoknada na implantatima
Introduction When intraocclusal space is long enough, and patient has high aesthetic demands, cementing implant restoration is the proper choice. The aim of this study was to assess retentive forces of different cements used for fixing restoration to implant abutment. Material and method the separation forces were measured between restorations and abutments that were screw retained to the implant replica. The restorations were casted from Co-Cr-Mo alloy. They were cemented to abutments with five different types of cements (composite resin, glass-ionomer, zinc-polycarboxylate, zinc-phosphate and temporary cement). Each cement represented one group and each group included seven samples. Results Composite resin, glass-ionomer and zinc-polycarboxylate cements showed similar values of retentive forces (256-275 N), while zinc-phosphate cements had slightly lower value (174 N). Temporary cement showed significantly lower value of retentive force (59N). All cements for permanent bonding showed almost the same separation nature. By slow loading, the stress develops, leading to slightly stretched cement and as a consequence, sudden break of cement. Temporary cements also develop stress when slowly loaded, which firstly leads to stretching of cement, and then slight detachment from the implant replica. Conclusion Temporary cement has the lowest retentive force and is suitable for temporary bonding. Composite resin, glass-ionomer, zinc-polycarboxylate and zinc-phosphate cements have high retentive force, and they can be used for permanent cementation of restoration to abutment. Due to the high values of separation force, and other positive characteristics, composite resin should be cement of choice for bonding restorations to implant abutments.Uvod Kod dovoljno velikog meÄuviliÄnog prostora i kod estetski zahtevnih pacijenata fiksiranje zubne nadoknade na implantatima cementom je metoda izbora. Cilj rada je da se na osnovu merenja sile razdvajanja zubne nadoknade od nosaÄa nadoknade, cementirane razliÄitim cementima, utvrde vrednosti retencionih sila za razliÄite vrste cemenata. Metode Merena je sila razdvajanja nadoknade od nosaÄa nadoknade, koji je fiksiran zavrtnjem za repliku implantata. Zubne nadoknade izlivene su od Co-Cr legure. Nadoknade su cementirane za nosaÄe nadoknada sa pet razliÄitih cemenata. Svaka vrsta cementa predstavljala je posebnu grupu. Merenja svake grupe su obavljana na sedam uzoraka. Rezultati Kompozitni, glas-jonomerni i karboksilatni cementi su pokazali približno iste vrednosti retencione sile (256-275 N), dok su cink-fosfatni cementi imali neÅ”to manju retencionu silu (174 N). Privremeni cementi su pokazali znaÄajno nižu retencionu silu (59 N). Svi cementi za trajno vezivanje su pokazivali gotovo istovetnu prirodu razdvajanja. Pri postepenom optereÄenju razvijaju se naponi u cementu koji dovode do neznatnog istezanja cementnog filma i naglog loma cementa. Pri postepenom optereÄenju privremeni cementi razvijaju napone koji prvo dovode do istezanja cementnog filma, a zatim do laganog odvajanja od replike implantata. ZakljuÄak Privremeni cementi imaju najmanju retencionu silu i pogodni su za privremena cementiranja. Kompozitni, glas-jonomerni, karboksilatni i cink-fosfatni cementi daju veliku retencionu silu koja može trajno fiksirati zubnu nadoknadu za nosaÄ implantata. Zbog velike sile razdvajanja, ali i zbog poznatih dobrih osobina, kompozitnim cementima treba dati prednost u cementiranju zubnih nadoknada na implantatima
v0: oscilator [43. Salon arhitekture]
NIÅ TA se matematiÄki oznaÄava nulom, koja grafiÄki predstavlja prazninu unutar zaokruženog prostora. Nula - niÅ”tica je ceo broj koji sledi posle broja -1 a prethodi broju 1. Projektovana instalacija alat je za ispitivanje integriteta i stabilnosti stanja prikazanog prizora u okruženju koje ga povremeno privremeno destabilizuje. Nulto projektovano stanje metafora je realizacije inicijalne stvaralaÄke zamisli, dok je svaka od destabilizacija posledica nepredvidivosti konteksta. Cilj je iniciranje promiÅ”ljanja o promeni i konstanti; mirovanju i pokretu; okosnici i oscilaciji; u arhitekturi, ili nekoj drugoj interesnoj sferi posmatraÄa/prolaznika. Svaki pokret, bljesak, zrak sunca, oblak, odsjaj ili automobilski far prizoru daju nov karakter. Može li on održati svoje nulto stanje? Rad v0: oscilator jedan je od poÄetnih koraka u hvatanju neuhvatljivog odgovora na pitanje Å ta bi bilo kad ne bi bilo niÅ”ta? i pokuÅ”aj je dokuÄivanja fiziÄkih, prostornih i ambijentalnih karakteristika tog niÄega. Naravno, ovo niÅ”ta nije zaista niÅ”ta, veÄ je samo predstava proživljenih, ali i onih joÅ” uvek nedovrÅ”enih, iskustvenih sekvenci koje destabilizuju i ostavljaju autentiÄan trag, ali ostaju bez fiziÄke, prostorne ili ambijentalne manifestacije kojom bi se o njima svedoÄilo. BaÅ” zbog toga, v0: oscilator postavlja se kao svojevrstan efemerni spomenik niÄemu, niÅ”tici ā nuli
Tracing The Intricate in Scene Design: The Temptation to be Happy [Recognition STRAND 2023]
Lorenzo Maroneās best-selling novel La tentazione di essere felici (The Temptation to be Happy), is renowned for its profound exploration of human relationships, emotions, and the significance of reflecting on all those seemingly small moments in life. The scene design concept for its staging at the National Theatre in Belgrade relies precisely on the intricacies of these relationships. Simultaneously, within a confined space, the audience is presented with all the actors and staging elements crucial for the play. Three main rotating walls, along with a few other essential pieces of furniture, move and transform the playing space to depict all the main settings for contemplating ordinary life, thereby showcasing the intertwined and complex relationships between the play's characters. The complexity of the relationships between the characters is translated into spatial elements subtly repeated and woven throughout the personal spaces of the various main characters. These include Cesare's apartment, Catherine's office, and Dante's apartment, as well as several non-places such as the gallery, street, and hospital. These recurring motifs serve as binding threads, symbolizing the interweaving of life's minutiaeāthe little things that give life meaning. The transformation of space from one setting to another evokes a poetic dance, highlighting the emergence of overarching qualities within the intricate web of relationships among characters, spaces, and spatial motifs. Director: Andrej Nosov, Playwright: ÄorÄe KosiÄ, Costume Designer: Selena Orb, Scenographer: Dejan TodoroviÄ, Composer: DraÅ”ko AdžiÄ, Stage Movement: Marija MilenkoviÄ, Executive Producer: Marija KovaÄeviÄ, Assistant Director: Aleksandra LozanoviÄ, Inspector: Sanja UgriniÄ Mimica, Prompter: Gordana Perovski Cast: Mladen AndrejeviÄ, Nela MihailoviÄ, Vanja Ejdus, DuÅ”an MatejiÄ, Nina NeÅ”koviÄ, Rade Äosi
Influence of FE-DBD plasma treatment on the wettability of wood
V diplomskem delu smo analizirali povrÅ”ino bukovega (Fagus sylvatica L.) in smrekovega (Picea abies (L.) Karst.) lesa, po obdelavi z dielektriÄno barierno razelektritveno (DBD) plazmo s plavajoÄo elektrodo. Znano je, da na uÄinek obdelave povrÅ”in lesa s plazmo vplivajo zunanji (lastnosti materiala in plina, dimenzije elektrod in reaktorja, elektriÄna moÄ, Äas tretiranja itd.) in notranji (lastnosti plazme) dejavniki. Pojav plazme smo posneli s fotokamero in analizirali z raÄunalniÅ”kim programom. Z doloÄanjem stiÄnih kotov vode na obdelanih in neobdelanih povrÅ”inah lesa smo preuÄili vpliv spreminjanja zunanjih parametrov naprave na omoÄljivost lesa. Zunanji parametri, ki smo jih spreminjali, so bili podajalna hitrost, razdalja med dielektrikoma (RME) in oddaljenost povrÅ”ine lesa od dielektrikov (RMES). Z vrstiÄnim elektronskim mikroskopom smo opazovali strukturo in topografijo povrÅ”in vzorcev. Izmerjene sive vrednosti analiziranih razelektritev pri obdelavi lesa bukve so bile viÅ”je kot pri obdelavi lesa smreke. Rezultati so pokazali, da se stiÄni kot kapljic vode zmanjÅ”a z zniževanjem podajalne hitrosti. PovrÅ”ino smrekovega lesa voda bolje omaka pri RMES 0,5 mm, pri bukovini pa pri 1 mm. Optimalna razdalja pri smrekovem vzorcu med elektrodama je 8 mm, pri bukovem pa so najboljÅ”i rezultati pri 10 mm.In this thesis, we analysed the surface of beech (Fagus sylvatica L.) and spruce (Picea abies (L.) Karst.) wood after treatment with dielectric barrier discharge (DBD) plasma with a floating electrode. It is known that the effects of plasma treatment of wood surfaces are influenced by external (material and gas properties, electrode and reactor dimensions, electrical power, treatment time, etc.) and internal (plasma properties) factors. Plasma appearance was recorded with a camera and analysed using a computer program. By determining the contact angles of water on treated and untreated wood surfaces, the effect of changing the external parameters of the device on the wettability of wood was examined. The external parameters we varied were the speed of samples, the distance between the dielectrics (RME) and the distance between the wood surface and the dielectrics (RMES). Using the scanning electron microscope, the structure and topography of the sample surfaces were observed. The measured grey values of analysed discharge in the treatment of beech wood were higher than in the treatment of spruce wood. The results showed that the contact angle of the water droplets decreases as the speed of samples decreases. The surface of spruce wood is better wetted with water at RMES 0.5 mm and the surface of beech wood at 1 mm. The optimum RME for the spruce specimen is 8 mm, and for the beech, the best results are at 10 mm
Tri Nove Apartment [STRAND 2021]
The main conceptual idea arose from the intention to open the kitchen towards the living area and make it a central motif of the apartment. Opposite to the kitchen's open structure, surrounding the sanitary block lies solid continual storage and display element. Applied materials are reduced to ash wood, terrazzo, and plain surfaces accented with black and brushed steel details, aiming to make different atmospheric feels in different lighting regimes in everyday living space
WĆRTH Serbia Training & Test Center [Mention STRAND 2019]
On Architecture: Challenges In Architecture, Urban Design And Art - international jury report: WĆ¼rth has made the attention for architecture to one of the key values of the companyās real estate policy. It is not just a matter of public relations & branding, the idea is to bring architecture closer to the community and to improve the quality of life. The training and test center is another example of this social-cultural ambition. Dejan TodoroviÄ managed to transform an old warehouse into multi-purpose rooms and to create a translucent and light atmosphere. By a simple dividing panels rearrangement, it can become anything from a series of individual classrooms or offices to conference space, exhibition gallery, or a party venue. On top of that using the company colours black, white and red in a rather subtle way, without being intrusive. One could say a kind of hygiene for the mind. Dejan TodoroviÄ creates the perfect balance between being distinctive and modest. The interior shows a lightness of being, leaving plentiful mental space enabling the users to focus on itās main function: training and testing. In doing so being an ideal environment for transferring knowledge. Taken these aspects in consideration the jury decided to honor the project with a mention
WĆ¼rth Srbija trening i test centar [Pohvala 42. Salon arhitekture]
42. Salon arhitekture UPORNO-OTPORNO - obrazloženje žirija: "OseÄaj projektanta da prostor starog industrijskog skladiÅ”ta u kome interveniÅ”e uspeÅ”no transformiÅ”e u prostor nove namene, svedoÄi o njegovom dubokom razumevanju konteksta, kao i o poznavanju mere sa kojom treba delovati u prostoru. Higijena arhitektonskog izraza i materijalizacija intervencije odlikuju visoku zrelost autora". (M. M.
WĆRTH Srbija trening i test centar [Priznanje 22. Salon arhitekture Novi Sad]
22. Salon arhitekture Novi Sad - obrazloženje internacionalnog žirija: Ideja reciklaže u arhitekturi jako je bitna I sve viÅ”e aktuelna. Arhitekta Dejan TodoroviÄ je u nekadaÅ”njoj industrijskoj hali ostvario savremeni i mulifunkcionalni ambijent. Izborom materijala (beton, metal i drvo), neutralne bele boje i rasterom svetla ukazuje na konstruktivni raster originalne arhitekture ali je istovremeno bez banalizovanja pretvara u prostor koji se rotirajuÄim akustiÄnim panelima brzo prilagoÄava željama i potrebama korisnika. Kao Å”to u svom tekstu zakljuÄujuje arhitekta: āOvaj enterijer cilja da ukaže na lakoÄu postojanja, uspostavljajuÄi novu dimenziju mentalnog prostora kojim se korisnicima pruža moguÄnost da se fokusiraju na njegove osnovne funkcije: obuku i testiranjeā
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