著者

OSAMU KONDO MEGUMI TASHIRO YUTAKA MIYAKE

出版者

The Anthropological Society of Nippon

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

pp.220122, (Released:2022-05-24)

被引用文献数

1

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Although early Neolithic Anatolia is a key region for the development of sedentary society by modern humans, osteological studies are limited to specimens from the later period or from other regions such as southern Levant. We examined nearly 100 human skeletal remains from Hasankeyf Höyük, a Pre-Pottery Neolithic A (PPNA) site in southeastern Anatolia, which were uncovered during an excavation between 2011 and 2015. A total of 124 individuals were identified as belonging to the Neolithic period. The adult/subadult ratio was close to 1:1, and the sex proportion was skewed towards an abundance in males. A few stature estimates fell within the variation range for Natufian and Neolithic peoples in the southern Levant and Anatolia. The estimated life expectancy was below 30, from 27 to 30 years old, based on age criteria related to dental wear stage. On the basis of dentognathic evidence, the skeletons exhibited heavy occlusal wear for their age, with a lot of obliquely slanted occlusal surfaces and enamel chipping. The observed oral health and dental abrasion patterns are discussed with regards to the people’s biological/behavioral adaptations to the environment, such as the nutritional quality of their diet, alimentary customs, or any indications that the teeth were used as a ‘third hand.’ The Hasankeyf Höyük people are considered to represent very early sedentary villagers in southeast Anatolia who would not have initiated the domestication of plants and animals.

著者

Takeo KAJISHIMA Satoshi TAKIGUCHI Hiroyuki HAMASAKI Yutaka MIYAKE

出版者

The Japan Society of Mechanical Engineers

雑誌

JSME International Journal Series B Fluids and Thermal Engineering (ISSN:13408054)

巻号頁・発行日

vol.44, no.4, pp.526-535, 2001 (Released:2002-09-27)

参考文献数

24

被引用文献数

164 215

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Turbulence modulation in particle-laden flow, especially the influence of vortex shedding, was investigated by means of the direct numerical simulation. To this end, we developed a finite-difference scheme to resolve the flow around each particle moving in turbulence. The method was applied to the flow around a sphere and the accuracy was confirmed up to the Reynolds number range with vortex shedding. The agreement between our 4th-order central finite-difference method and spectral method for turbulent channel flow without particles was also fine. Then, we simulated upward flow in a vertical channel including solid particles. The velocity and vorticity fluctuations as well as Reynolds shear stress were strongly affected by wakes from particles. The shed vortices were elongated in the mainstream direction by the velocity gradient and resulted in the hairpin vortices. They increased the energy production rate in couple with production due to particle-turbulence correlation.