Nonnulla ad interpretandum Carmen Simonidis de mulieribus inscriptum pertinentia. [Progr.]

Mode of access: Internet.

Interaktive Erinnerungsräume - LambdaMOOs und Lernen im CAVE als Erben des Simonides?

Der Cyberspace - im Sinne sowohl von weltweiter Vernetzung als auch von räumlich simulierten Scheinwelten - bietet nicht nur Künstlern ein neues Betätigungsfeld, sondern eröffnet auch neue Perspektiven für die wissenschaftliche Forschung und Lehre. Schon in der Antike war die Kunst der Memoria eng mit der räumlichen Vorstellungskraft verbunden. Während die antiken, mentalen Erinnerungsräume jedoch nur individuelle Wissenskonstruktionen erlaubten, ermöglicht die digitale Technologie die Schaffung von virtuellen Kommunikationsräumen. Diese können nicht nur eine flexible Strukturierung von Wissen erleichtern, sondern auch zu einer neuen Form des wissenschaftlichen Austauschs führen. Gerade die Kunstgeschichte, die es primär mit visuell wahrnehmbaren Gegenständen zu tun hat, muss sich fragen, inwieweit die Darstellung und Diskussion ihres Forschungsgegenstandes im virtuellen Raum dem Fach neue Perspektiven eröffnet.

Simonides et Pythagoras, artis mnemonicae inventores. Dissertatio historica.

Mode of access: Internet.

Simonides, seu, De theologia poetarum /

Corrigenda follow text, last p.

Effect of fluid resins on the surface roughness and topography of resin composite restorations analyzed by atomic force microscope

The aim of the study was to verify the influence of surface sealants on the surface roughness of resin composite restorations before and after mechanical toothbrushing, and evaluate the superficial topography using atomic force microscope. Five surface sealers were used: Single Bond, Opti Bond Solo Plus, Fortify, Fortify Plus and control, without any sealer agent. The lowest values of surface roughness were obtained for control, Single Bond and Fortify groups before toothbrushing. Fortify and Fortify Plus were the sealer agents that support the abrasive action caused by the toothbrushing although Fortify Plus group remained with high values of surface roughness. The application of specific surface sealants could be a useful clinical procedure to maintain the quality of resin-based composite restorations. (C) 2010 Elsevier Ltd. All rights reserved.

Effect of cyclic compressive loading on the bond strength of an adhesive system to dentin after collagen removal

Purpose: The objective of this study was to verify the effect of cyclic compressive loading on the shear bond strength of an adhesive system following collagen removal. Materials and Methods: Sixty bovine teeth were divided into 4 groups based on the adhesive procedure used: groups 1 and 2 - etching with 35% phosphoric acid and application of the Single Bond adhesive system; groups 3 and 4 - after etching, a 10% sodium hypochlorite solution was applied for 1 min before the application of the adhesive. In all the specimens, a Z100 resin cylinder was built up over the bond area. Groups 2 and 4 were submitted to 500,000 cycles with a load of 100 N. Results: The mean values for the shear bond test (MPa) were: group 1: 7.37 ± 1.15; group 2: 5.72 ± 1.66; group 3: 5.95 ± 1.21; group 4: 3.66 ± 1.12. There was no difference between groups 1 and 2 (p > 0.01). Between groups 1 and 3, 2 and 4, and 3 and 4 there was a significant difference (p < 0.01). The majority of the specimens demonstrated an adhesive failure. Conclusion: The application of sodium hypochlorite on dentin decreased the values of shear bond strength, as did the load cycling in the group treated with sodium hypochlorite.

In vitro evaluation of surface roughness of 4 resin composites after the toothbrushing process and methods to recover superficial smoothness.

OBJECTIVE: This study evaluated the efficiency of repolishing, sealing with surface sealant, and the joining of both in decreasing the surface roughness of resin-based composites after a toothbrushing process. METHOD AND MATERIALS: Ten specimens of each composite (Alert, Z100, Definite, and Prodigy Condensable), measuring 2 mm in thickness and 4 mm in diameter, were made and submitted to finishing and polishing processes on both sides of the specimens using the Sof-Lex system. The specimens were then subjected to toothbrushing (30,000 cycles), and surface roughness (Ra) was analyzed with a Surfcorder SE 1700 profilometer. The upper surface of each composite was etched with 37% phosphoric acid, and the surface-penetrating sealant Protect-it was applied on 1 surface. The roughness of these surfaces was again measured. On the other side, the surface of the specimen was repolished, and the efficiency of this procedure was measured using the profilometer. The surface roughness resulting from the joining of the 2 methods was verified by applying, in the final stage, the surface-penetrating sealant on the repolished surface. Data were analyzed with analysis of variance and Tukey test (P <.05). RESULTS: Results showed that the lowest surface roughness values were obtained for Definite, Z100, and Prodigy Condensable after the repolishing process and after the repolishing plus sealing. For Alert, the joining of repolishing plus sealing promoted the lowest values of surface roughness. CONCLUSION: Of the resin-based composites, Alert demonstrated the highest values of surface roughness in all the techniques tested.

In vitro evaluation of the abrasiveness of a commercial low-abrasive dentifrice and an experimental dentifrice containing vegetable oil

Toothpastes usually contain detergents, humectants, water colorant, fluoride and thickeners (e.g. silica). Tooth wear has a multi-factorial etilology and the use of abrasive dentifrices is related to abrasion of dental tissues during toothbrushing. This study evaluated in vitro the abrasiveness of a commercial silica gel low-abrasive dentrifice compared to an experimental dentifrice containing vegetable (almond) oil. Distilled water served as a control group. Acrylic specimens (8 per group) were submitted to simulated toothbrushing with slurries of the commercial dentifrice experimental dentifrice, almond oil and water in an automatic brushing machine programmed to 30,000 brush strokes for each specimen which is equivalent to 2 years of manual toothbrushing. Thereafter, surface roughness (Ra) of the specimens was analyzed with a Surfcorder SE 1700 profilometer. Data were analyzed statistically by ANOVA and Tukey's test at 5% significance level. There was no statistically significant differences (p>0.05) in the surface roughness after brushing with water almond oil experimental dentifrice. The commercial dentifrice produced rougher surfaces compared to the control and abrasive free products (p<0.05). Further studies are necessary in confirm the potential benefits of using vegetable oil in toothpaste as an alternative in abrasives in an attempt to minimize the tooth wear caused by toothbrushing.

Influence of surface sealants on microleakage of composite resin restorations

Purpose: The purpose of this study was to verify the influence of surface sealants and dentin adhesive systems on the microleakage of composite restorations. Methods: Class V cavities were made on the buccal faces of 100 permanent third molars and restored with Z250. After 24 hours, they were submitted to polishing and finishing processes. The teeth were divided into groups according to the sealant agent: group 1 - Single Bond; group 2 - Opti Bond Solo Plus; group 3 - Fortify; group 4 - Fortify Plus; and group 5 - control without sealant. The analysis of immediate microleakage was performed in 10 restorations from each group, soon after the sealing. The other 10 specimens from each group were submitted to tooth-brushing and thermal cycles. The teeth were isolated and immersed in 2% methylene blue solution, washed in tap water, and sectioned in the buccolingual direction. The percentage of marginal leakage was calculated using an image analysis program, and results were submitted to analysis of variance and Tukey's test. Results: All the sealed groups demonstrated lower microleakage values compared to the control group. Group 3, sealed with Fortify, presented the lowest mean microleakage values. Conclusion: The application of surface sealants effectively decreased the microleakage in composite resin restorations.

Simónides y la metáfora del intercambio

Ningún género poético es más profundo que el epitafio para otorgar carácter fundacional a la palabra, porque su misión es insertar al pasado muerto y desaparecido en un presente vivo. Simónides de Ceos le otorgó a la escritura de epitafios una forma artística. Fue el más prolífico compositor de epitafios en el mundo antiguo y su valor posterior se edificó sobre la base de haber sido él quien fijó las convenciones del género. A partir de esta instancia, la referencia al epitafio resultó inseparable de su nombre. Simónides inauguró un estilo de pensar y hablar acerca de la muerte y contribuyó a crear la metáfora metafísica del 'intercambio', mediante la palabra escrita

Simónides y la metáfora del intercambio

Ningún género poético es más profundo que el epitafio para otorgar carácter fundacional a la palabra, porque su misión es insertar al pasado muerto y desaparecido en un presente vivo. Simónides de Ceos le otorgó a la escritura de epitafios una forma artística. Fue el más prolífico compositor de epitafios en el mundo antiguo y su valor posterior se edificó sobre la base de haber sido él quien fijó las convenciones del género. A partir de esta instancia, la referencia al epitafio resultó inseparable de su nombre. Simónides inauguró un estilo de pensar y hablar acerca de la muerte y contribuyó a crear la metáfora metafísica del 'intercambio', mediante la palabra escrita

Simónides y la metáfora del intercambio

Ningún género poético es más profundo que el epitafio para otorgar carácter fundacional a la palabra, porque su misión es insertar al pasado muerto y desaparecido en un presente vivo. Simónides de Ceos le otorgó a la escritura de epitafios una forma artística. Fue el más prolífico compositor de epitafios en el mundo antiguo y su valor posterior se edificó sobre la base de haber sido él quien fijó las convenciones del género. A partir de esta instancia, la referencia al epitafio resultó inseparable de su nombre. Simónides inauguró un estilo de pensar y hablar acerca de la muerte y contribuyó a crear la metáfora metafísica del 'intercambio', mediante la palabra escrita

La exploración del litoral atlántico norteafricano según el periplo de Hannón de Cartago

El periplo de Hannón, frente a las propuestas que lo interpretan como una obra literaria, creemos que recoge un periplo auténtico, que sólo alcanzó cabo Juby y algunas de las Islas Canarias. Las refundaciones cartaginesas fueron todas en la Mauretania fértil, en los 7 primeros días de la expedición. Desde el islote de Kérne, en la expedición primó una primera exploración de evaluación, indicativo de que se trataba de apenas 2 o 3 barcos, con una tripulación limitada, que evitaban enfrentamientos con la población local. Los intérpretes Lixítai parecen conocer todos los puntos explorados, el río Chrétes, los etíopes del Alto Atlas costero, el gran golfo caluroso que finalizaba en el Hespérou Kéras, el volcán Theôn Óchema, o las gentes salvajes que denominaban Goríllai. Probablemente la mayor sorpresa fuese encontrar un volcán activo, emitiendo lava, que pudo ser la razón última para redactar este periplo. La falta de agua, alimentos y caza como razón para finalizar la expedición exploratoria sólo es comprensible en un trayecto corto que alcanzó hasta el inicio del desierto del Sahara. Otro tanto sucede con la ausencia de ríos importantes al Sur del río Chrétes, una clara prueba de que no se alcanzaron latitudes ecuatoriales y que los barcos se fueron alejando de la costa norteafricana.