During the 2018 campaign at Olba (Silifke District of Mersin Turkey), a broken sard was recovered from a child’s grave. Its fragmentary condition renders identification difficult. Markings at the top ...suggest that it might portray a figure associated with Dionysiac worship; however, the iconography fairly clearly suggests a representation of Priapus. The confident design and skilful modelling of the limbs, and the considerable formal rigour that combines classical style with a simplified rendering of the knees and feet characteristic of the Italic-Republican ‘pellet style’, allow the sard to be dated to the second century BC.
Mersin İli Silifke İlçesi’ne bağlı Olba antik kentinde 2018 yılında yapılan kazılarda oyma tekniği ile yapılmış değerli bir yüzük taşı ele geçmiştir. Bu gem Olba akropolisinde yapılan kazılarda bir çocuk mezarının içinde bulunmuştur. Söz konusu yüzük taşının kırık halde ele geçmesi konuyu tam anlamıyla anlamayı zorlaştırmaktadır. Yüzük taşının üst kısmında tespit edilebilen izler burada Dionysos ile ilişkili dinsel betimlerde gördüğümüz bir figürü hatırlatmaktadır. Öte yandan figürde gözlemlenen bazı ayırtedici özellikler Priapos ile ilgili bir tasvirden de söz edilmesi gerektiğini göstermektedir. Yüzük taşı üzerinde betimlenen figürün kendinden emin bir biçimde tasarımı, ustaca modellenmiş vücut kısımları, özellikle dizlerde gözlemlenebilen klasik sitilin ustaca izleri ve ayakların küçük topaklarla basitleştirilmiş şekilde sunulması ile yakalanan biçimsel titizlikten yola çıkarak eseri MÖ 2. yüzyıla tarihleyebiliriz.
High-resolution semiconductor nanocrystal quantum dot (QD) patterns are required for applications in display devices. For this, the dry transfer printing of QDs is promising because it does not ...degrade the inherent properties of QDs. However, the effect of the surface ligands on this process remains poorly understood, despite its importance. Herein, we investigate the effect of the surface ligands on the intaglio transfer printing process. Colloidal QDs with organic (C8–C18) or inorganic (I−) ligands are prepared. In various pattern-printing tests, including patterns with a sub-10-μm width, the patterning yield is ∼100% for QDs with long-chain ligands (C18). However, the patterning yield decreases with decrease in the chain length for the organic-ligand-passivated QDs and is the lowest for the QDs passivated with I−. Using surface energy characterization and finite element method simulations, we suggest two printing failure mechanisms: (i) Inorganic-ligand-passivated QDs are not effectively picked-up by the stamp because of poor adhesion, and, (ii) for the organic-ligand-passivated QDs, internal crack formation is easier for QDs having short-chain ligands because of the weak interparticle attraction between QDs. Our findings reveal previously unknown defects of the intaglio printing process and provide guidance for mitigating these problems for preparing high-resolution QD patterns.
Display omitted
•The effect of the surface ligands on the intaglio transfer printing process is investigated.•The patterning yield increases with increase in the chain length of surface ligands, reaching ∼100% with oleic acid-passivated quantum dots even for the sub-10 μm resolution.•Inorganic-ligand-passivated quantum dots are not effectively picked-up by the stamp because of their poor surface adhesion.•For organic-ligand-passivated quantum dots, internal crack formation is easier for quantum dots having short-chain organics because of the weak interparticle attraction.
Two interesting banknote cases Pang, C. M.
Australian journal of forensic sciences,
05/2024, Letnik:
56, Številka:
Supp1
Journal Article
Recenzirano
Two interesting banknote cases are reported, one regarding a 50 Euro note and the other a Philippine 200 Peso note. Both questioned banknotes were examined and compared with their respective control ...banknotes. Both questioned banknotes displayed discrepancies with respect to the corresponding control banknotes. However, the authenticity of the 50 Euro note and the Philippine 200 Peso note remained undetermined.
•The manufacturing process, surface structure, chemical composition, and corrosion properties of three electrotype plates from the first laboratory for electrotyping in Vienna from 1844 were ...investigated.•Two intaglio plates made for printing exhibited no metal coating.•One relief negative for electrotyping reproduction was coated with silver to ease the separation from an electrotype copy.•Thin colophony films with traces of vegetable wax were identified by ATR–FTIR, GC–MS and multispectral imaging analysis.
The technology of electrotyping was successfully applied for the reproduction of printing plates shortly after its invention in 1838. In Austria, high-quality printing plates have already been produced at the beginning of the 1840s in the first laboratory for electrotyping in Vienna. However, little is known about the properties of electrodeposited printing plates from this early period. In this study the manufacturing process, surface structure, chemical composition, and corrosion properties of three electrotype plates from the Viennese laboratory were investigated. Two samples were intaglio plates made for printing and one was a relief negative for electrotyping reproduction. They exhibited no metal coating, whereas the third sample, a relief plate, was coated with silver to ease the separation from an electrotype copy. Thin colophony films with traces of vegetable wax were identified by ATR–FTIR spectroscopy and GC–MS. Multispectral imaging analysis by UV reflectance indicated a strong inhomogeneous distribution between elevations and depressions of the relief plate.
This
analysis aimed to compare the intaglio trueness, the antagonist's wear volume loss, and fracture load of various single-unit zirconia prostheses fabricated by different manufacturing techniques.
...Zirconia crowns were prepared into four different groups (n = 14 per group) according to the manufacturing techniques and generations of the materials. The intaglio surface trueness (root-mean-square estimates, RMS) of the crown was measured at the marginal, axial, occlusal, and inner surface areas. Half of the specimens were artificially aged in the chewing simulator with 120,000 cycles, and the antagonist's volume loss after aging was calculated. The fracture load for each crown group was measured before and after hydrothermal aging. The intaglio trueness was evaluated with Welch's ANOVA and the antagonist's volume loss was assessed by the Kruskal-Wallis tests. The effects of manufacturing and aging on the fracture resistance of the tested zirconia crowns were determined by two-way ANOVA.
The trueness analysis of the crown intaglio surfaces showed surface deviation (RMS) within 50 µm, regardless of the manufacturing methods (
= .053). After simulated mastication, no significant differences in the volume loss of the antagonists were observed among the zirconia groups (
= .946). The manufacturing methods and simulated chewing had statistically significant effects on the fracture resistance (
< .001).
The intaglio surface trueness, fracture resistance, and antagonist's wear volume of the additively manufactured 3Y-TZP crown were clinically acceptable, as compared with those of the 4Y- or 5Y-PSZ crowns produced by subtractive milling.
Recent excavations in the southwestern part of the embayment that served as the ancient harbour of Berenike uncovered, among others, a metallurgical furnace from late Hellenistic times. An analysis ...of this discovery, made in trench BE14/15-102, offers insight into metallurgical production taking place in the harbour zone in the last years of the Ptolemaic kingdom. The early Roman phase, as attested in this trench, indicates a restructuring of this part of the harbour and its new, changed function as an open-circulation area, probably with some wealthy residences nearby.
The article presents the collection of Roman engraved gems in the National Museum of Archaeology, in Lisbon. Although a small cabinet, it contains a wide variety of themes and motifs. Among the ...intaglios, the nicolos deserve to be especially highlighted for their quantity when compared with the others, thus strenghtening the evidence for the existence of a regional quartz industry in the city of Ammaia, which particularly specialized in the manufacture of nicolo gemstones. The themes match those existing throughout the Empire, but some items deserve special attention: Eros removing a thorn from a lion’s paw (no. 3); three Satyrs performing a sacrifice (no. 1); the wounded warrior (no. 31); the ‘prodigy scene’ (no. 36); Faustulus, the Capitoline Wolf and the twins (no. 37); a possible portrait of Cleopatra (no. 42); the Jewish symbols (no. 70) and the magical amulet (no. 72).
This article introduces the graphic work of Olena Kulchytska (1877–1967) within the cross-cultural context of Austro-Hungary and the Russian Empire pre-1914, where she received her training. ...Kulchytska is at once an internationalist and European artist and indebted to regional religious practice and local folkloric motifs. She practised her craft designing ex-libris bookplates, an important genre in Ukraine. The article then analyses the iconography of Kulchytska’s graphic works on military themes, emphasizing their significance in the context of Ukrainian identity. The parallels between the horrors she depicted and events from Ukrainian history (from the Early Middle Ages to the second half of the twentieth century) are identified, and the quite timeless character of most of the images and symbols is demonstrated. The practical significance of this study lies in its emphasis on the war theme in modern art, especially in the conditions of the current war in Ukraine.
PDF
