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Showing 3 results for sareban
Hassan sareban,
Volume 4, Issue 4 (3-2016)
Abstract
The life cycle of bobtail squid (Euprymnahyllebergi:Sepiolidae) was investigated by incubating its eggs and rearing the hatchlings at 28.5±0.5°C and 37-38ppt salinity conditions in the Molluscs Research Station (Bandar Lengeh). After 12±3 days incubation, hatchlings with 2.23±0.05 mm mantle length and 4±1 mg wet weight emerged out. Hatchlings were fed with artemia, mysid shrimp and postlarvae of white-leg shrimp. In 30 days, they grew to 5.94±1.18 mm and 254±16 g, in 60 days to 13.96±1.87 mm, and 2.214±0.213 g, and in 90 days they grew to 18.14±2.23 mm and 4.234±0.548 g. First mating and spawning was observed in days 109 and 110, respectively, when the squids were 20.12±2.64 mm in mantle length and 5.849±1.204 g in body weight. Each female laid 70±10 eggs and died 2-4 days after spawning, followed by males after 7-15 days. Results show that bobtail squid have short life span and can easily be produced and succeeded by the next generation under laboratory conditions.
Volume 8, Issue 4 (2019 2019)
Abstract
Aims Sacred architecture is a reflector of divine beauties, and it is an illustrative example of the combination and association of symbolic forms with our deep beliefs and this connection can be expressed in the deepest mysterious layers of the altar. The altar is the most important part of the religious building. In the history of architectural decorations in Islamic art, altar has always embedded the best and most valuable examples in terms of style and in terms of motifs as well as calligraphy values. The Aljaito altar, in terms of the art of Stucco used in it, is in the rank of the most beautiful works of the Ilkhani era. In this research, the study of the herbal designs of the altar, the characteristics, and generalities of the motifs and the patterns governing them are the aim of the research.
Instruments & Methods Through library and field studies, we have identified the decoration of the altar of the Jameh Mosque of Isfahan. The research method is descriptive-analytical and uses architectural software.
Findings & Conclusion The following results were obtained by examining the designs and decorations of Aljaito altar: 81 patterns of herbal design were extracted from the altar designs, with a range of 28% horizontal rectangle, 22% circle, 21% pentagon, 15% vertical rectangular, 7% star, 6% square, and 1% Shamseh; the majority of it included horizontal rectangle. Also, the dominant line in Aljaito altar designs adhered to 100% of the curve pattern, and 85% were completely non-symmetrical and 15% was vertical to the axis in the herbal designs.
Volume 19, Issue 3 (March 2019)
Abstract
In this study, the method of releasing strains for calculating residual stresses in hole drilling process has been considered. For this purpose, a thick piece of cylindrical aluminum of 5 mm thickness has been investigated. Stepwise and high-speed drilling was performed in several successive steps, and released strains were recorded by a rosette strain gauge. The distribution of released strains in 3 forms of functions in the depth of the hole has been studied to transform strains to stresses, a linear function, a second-order function, and a third-order function. For each case, the longitudinal, tangential, shear stresses, principle stresses, and principle angles in the thickness of the piece were calculated and the results of the convergence analysis by the Tikhonov regularization were evaluated. In the end, the results are evaluated and compared for 3 modes. The results of the comparison of stresses and the degree of curves have shown that the third-order curve is more suitable for evaluation of released strains and using to transform them to residual stresses, and the magnitude of the error in the second-order curve is greater than the two other modes.
