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Oberflächenveränderung verschiedener zahnmedizinischer Werk-stoffe nach in-vitro Alterung
Get PDFSusceptibility of different restorative materials to toothbrush abrasion and coffee staining
Objective: The aim of this study was to evaluate the susceptibility of different restorative materials to surface alterations after an aging simulation.
Methods: Specimens (n=15 per material) of five different restorative materials (CER: ceramic/Vita Mark II; EMP: composite/Empress Direct; LAV: CAD/CAM composite/Lava Ultimate; COM: prefabricated composite/Componeer; VEN: prefabricated composite/Venear) were produced. Whereas CER was glazed, EMP and LAV were polished with silicon polishers, and COM and VEN were left untreated. Mean roughness (Ra and Rz) and colorimetric parameters (L*a*b*), expressed as colour change (E), were measured. The specimens underwent an artificial aging procedure. After baseline measurements (M1), the specimens were successively immersed for 24 hours in coffee (M2), abraded in a toothbrushing simulator (M3), immersed in coffee (M4), abraded (M5) and repeatedly abraded (M6). After each aging procedure (M2-M6), surface roughness and colorimetric parameters were recorded. Differences between the materials regarding Ra/Rz and E were analysed with a nonparametric ANOVA analysis. The level of significance was set at α=0.05.
Results: The lowest roughness values were obtained for CER. A significant increase in Ra was detected for EMP, COM and VEN compared to CER. The Ra/Rz values were found to be highly significantly different for the materials and measuring times (M) (p<0.0001). Regarding E most alterations were found for EMP and COM, whereas CER and LAV remained mostly stable. The E values were significantly different for the materials and M (p<0.0001).
Conclusion: The ceramic and the CAD/CAM composite were the most stable materials with regard to roughness and colour change and the only materials that resulted in Ra values below 0.2 μm (the clinically relevant threshold). Venears and Componeers were more inert than the direct composite material and thus might be an alternative for extensive restorations in the aesthetic zone
Jacques Kuster. L'Ordre des éléments et ses implications stylistiques dans la phrase des Homélies d'Ælfric comparée à celle des sermons de Wulfstan. Thèse de doctorat d’État soutenue à Paris IV, le 6 janvier 1978
No full textKuster Jacques. Jacques Kuster. L'Ordre des éléments et ses implications stylistiques dans la phrase des Homélies d'Ælfric comparée à celle des sermons de Wulfstan. Thèse de doctorat d’État soutenue à Paris IV, le 6 janvier 1978. In: Bulletin des anglicistes médiévistes, N°15, printemps 1979. p. 165
Consent of the injured party to harm
Get PDFNačelo volenti non fit injuria poznamo že iz časa rimskega prava, v slovenskem pravnem redu pa je kodificirano v 140. členu OZ oziroma v institutu privolitve oškodovanca v škodo. Oškodovančeva privolitev izključuje protipravnost ravnanja in povzročene škode, posledično pa tudi odškodninsko odgovornost povzročitelja škode. Kljub temu da gre za institut, ki ima razmeroma dolgo pravno zgodovino, v slovenskem pravnem prostoru še ni zadostno raziskan. Magistrsko delo se osredotoča na prikaz geneze izvora načela volenti non fit injuria oziroma instituta privolitve oškodovanca v škodo in na njegovo umestitev v slovenski pravni sistem. Avtor analizira pravno naravo instituta privolitev oškodovanca v škodo in na tej podlagi prikaže, na kakšen način privolitev oškodovanca izključi protipravnost ravnanja in povzročene škode. Nadalje avtor analizira predpostavke, ki morajo biti izpolnjene, da privolitvi oškodovanca pripišemo pravno veljavnost in predstavi relevantna stališča obstoječe slovenske pravne teorije. Predstavljeni so tudi razlikovalni kriteriji, ki institut privolitve oškodovanca v škodo ločujejo od instituta ravnanja na lastno odgovornost, končno pa avtor poskuša začrtati tudi vsebinske meje pravno priznane privolitve oškodovanca v škodo.The principle of volenti non fit injuria has been known since the time of Roman law, and in the Slovenian legal system, it is codified in Article 140 of the Obligations Code, which deals with the institute of the injured party\u27s consent to harm. The injured party\u27s consent excludes the illegality of the act and the resulting damage, and consequently, the liability for damages of the perpetrator. Although this principle has a relatively long legal history, it has not been sufficiently researched in the Slovenian legal space.
This master\u27s thesis focuses on presenting the genesis of the principle of volenti non fit injuria or the institute of the injured party\u27s consent to harm and its placement with-in the Slovenian legal system. The author analyses the legal nature of the institute of the injured party\u27s consent to harm and on this basis, demonstrates how the injured party\u27s consent excludes the illegality of the act and the resulting damage. Further-more, the author analyses the prerequisites that must be met for the injured party\u27s consent to be legally valid and presents relevant viewpoints of existing Slovenian le-gal theory. The distinguishing criteria that separate the institute of the injured party\u27s consent to harm from the institute of acting at one\u27s own risk are also presented. Finally, the author attempts to delineate the substantive boundaries of legally recognized consent to harm
Kuster Apartments P.1
No full textKuster Apartments, 321 E. 5th So., June 1909. Shipler Commercial Photographers Collection, #9436
Kuster Apartments P.2
No full textKuster Apartments, 321 E. 5th So., June 1909. Shipler Commercial Photographers Collection, #9435
Mr. Kuster, Apartment House
No full textImage shows a general, exterior view of the Kuster Apartments.The signs posted around the building say, "To Be Let, Stowe and Palmer.
Cross-bridging the gap between energetics, Ca2+, sarcomere length and diastolic dysfunction
Get PDFVelden, J. van der [Promotor]Kuster, D.W.D. [Copromotor
Disease modifiers in hypertrophic cardiomyopathy: Interaction between calcium, titin and beta-adrenergic receptor stimulation
Get PDFVelden, J. van der [Promotor]Kuster, D.W.D. [Copromotor
Cardiac remodeling and genotype-specific pathogenic effects in dilated cardiomyopathy
Get PDFVelden, J. van der [Promotor]Pinto, Y.M. [Promotor]Kuster, D.W.D. [Copromotor
Melt pool detection at wire arc welding
Get PDFPri izdelavi 3D tiskanih kovinskih izdelkov s postopkom obločnega navarjanja z žico je težko doseči dobro dimenzijsko natančnost zaradi nestacionarnosti varilnega postopka, kar se odraža v valovitosti sten izdelkov in razliki med željeno in dejansko višino navarjenega sloja. Napaka se povečuje z večanjem števila navarjenih slojev. Z namenom povečanja dimenzijske natančnosti postopka smo razvili sistem za snemanje varjenja z visokohitrostno kamero ter algoritem za robustno in hitro zaznavo bazena taline iz dobljenih slik. Analizirali smo možnosti uporabe dobljenih podatkov o bazenu taline kot povratno zanko za krmiljenje varilnega aparata.Achieving good dimensional accuracy for 3D printed objects with the Gas metal arc welding process (Wire-arc additive manufacturing) is difficult because of the non-stationarity of the welding process, which results in object wall waviness and differences between the desired and actual layer height of the welded material. This error is cumulative and rises in proportion to the number of welded layers. To improve the dimensional accuracy of Wire-arc additively manufactured objects, we design a system to record welding using a high speed camera, and design an algorithm for robust and fast melt pool detection from the images. We analyze the possibilities of using this data as a feedback loop for controlling the welding machine parameters in real time
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