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 međuviličnog 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 nosača nadoknade, cementirane različitim cementima, utvrde vrednosti retencionih sila za različite vrste cemenata. Metode Merena je sila razdvajanja nadoknade od nosača nadoknade, koji je fiksiran zavrtnjem za repliku implantata. Zubne nadoknade izlivene su od Co-Cr legure. Nadoknade su cementirane za nosače nadoknada sa pet različitih 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 nešto manju retencionu silu (174 N). Privremeni cementi su pokazali značajno nižu retencionu silu (59 N). Svi cementi za trajno vezivanje su pokazivali gotovo istovetnu prirodu razdvajanja. Pri postepenom opterećenju razvijaju se naponi u cementu koji dovode do neznatnog istezanja cementnog filma i naglog loma cementa. Pri postepenom opterećenju privremeni cementi razvijaju napone koji prvo dovode do istezanja cementnog filma, a zatim do laganog odvajanja od replike implantata. Zaključak 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 nosač 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]

NIŠTA se matematički označava nulom, koja grafički predstavlja prazninu unutar zaokruženog prostora. Nula - ništica 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 stvaralačke zamisli, dok je svaka od destabilizacija posledica nepredvidivosti konteksta. Cilj je iniciranje promišljanja o promeni i konstanti; mirovanju i pokretu; okosnici i oscilaciji; u arhitekturi, ili nekoj drugoj interesnoj sferi posmatrača/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 početnih koraka u hvatanju neuhvatljivog odgovora na pitanje Šta bi bilo kad ne bi bilo ništa? i pokušaj je dokučivanja fizičkih, prostornih i ambijentalnih karakteristika tog ničega. Naravno, ovo ništa nije zaista ništa, već je samo predstava proživljenih, ali i onih još uvek nedovršenih, iskustvenih sekvenci koje destabilizuju i ostavljaju autentičan trag, ali ostaju bez fizičke, prostorne ili ambijentalne manifestacije kojom bi se o njima svedočilo. Baš zbog toga, v0: oscilator postavlja se kao svojevrstan efemerni spomenik ničemu, ništici – nuli

Tracing The Intricate in Scene Design: The Temptation to be Happy [Recognition STRAND 2023]

Lorenzo Marone’s 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 minutiae—the 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: Đorđe Kosić, Costume Designer: Selena Orb, Scenographer: Dejan Todorović, Composer: Draško Adžić, Stage Movement: Marija Milenković, Executive Producer: Marija Kovačević, Assistant Director: Aleksandra Lozanović, Inspector: Sanja Ugrinić Mimica, Prompter: Gordana Perovski Cast: Mladen Andrejević, Nela Mihailović, Vanja Ejdus, Dušan Matejić, Nina Nešković, Rade Ćosi

Influence of FE-DBD plasma treatment on the wettability of wood

V diplomskem delu smo analizirali površino bukovega (Fagus sylvatica L.) in smrekovega (Picea abies (L.) Karst.) lesa, po obdelavi z dielektrično barierno razelektritveno (DBD) plazmo s plavajočo elektrodo. Znano je, da na učinek obdelave površin lesa s plazmo vplivajo zunanji (lastnosti materiala in plina, dimenzije elektrod in reaktorja, električna moč, čas tretiranja itd.) in notranji (lastnosti plazme) dejavniki. Pojav plazme smo posneli s fotokamero in analizirali z računalniškim programom. Z določanjem stičnih kotov vode na obdelanih in neobdelanih površinah lesa smo preučili vpliv spreminjanja zunanjih parametrov naprave na omočljivost lesa. Zunanji parametri, ki smo jih spreminjali, so bili podajalna hitrost, razdalja med dielektrikoma (RME) in oddaljenost površine lesa od dielektrikov (RMES). Z vrstičnim elektronskim mikroskopom smo opazovali strukturo in topografijo površin vzorcev. Izmerjene sive vrednosti analiziranih razelektritev pri obdelavi lesa bukve so bile višje kot pri obdelavi lesa smreke. Rezultati so pokazali, da se stični kot kapljic vode zmanjša z zniževanjem podajalne hitrosti. Površino 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 najboljši 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

WÜRTH Serbia Training & Test Center [Mention STRAND 2019]

On Architecture: Challenges In Architecture, Urban Design And Art - international jury report: Würth has made the attention for architecture to one of the key values of the company’s 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 Todorović 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 Todorović 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 it’s 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

Würth Srbija trening i test centar [Pohvala 42. Salon arhitekture]

42. Salon arhitekture UPORNO-OTPORNO - obrazloženje žirija: "Osećaj projektanta da prostor starog industrijskog skladišta u kome interveniše uspešno transformiše u prostor nove namene, svedoči 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.

WÜRTH 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 više aktuelna. Arhitekta Dejan Todorović je u nekadašnjoj 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 rotirajućim akustičnim panelima brzo prilagođava željama i potrebama korisnika. Kao što u svom tekstu zaključujuje arhitekta: “Ovaj enterijer cilja da ukaže na lakoću postojanja, uspostavljajući novu dimenziju mentalnog prostora kojim se korisnicima pruža mogućnost da se fokusiraju na njegove osnovne funkcije: obuku i testiranje”