Results 181 to 190 of about 26,676 (308)

A reappraisal of the Middle to Later Stone Age prehistory of Morocco Réévaluer la préhistoire du Maroc, du Middle Stone Age au Later Stone Age

Journal of the Royal Anthropological Institute, EarlyView.
Over the last 25 years, perceptions of the early prehistory of Northwest Africa have undergone radical changes due to new fieldwork projects and a corresponding growth in scientific interest in the region. Much of this work has been focused in Morocco, known for its extremely rich fossil and archaeological records in caves and rock shelters.
Nick Barton, Abdeljalil Bouzouggar, Stacy Carolin, Louise Humphrey   +3 more
wiley   +1 more source

Comparison of the Ultrasonic Tip with Multidirectional Angular Cutting Geometry with the Straight Dentition Cutting in Bone Osteotomies with the Piezoelectric Technique. [PDF]

Dent J (Basel)
D'Amado MP, Pulino B, Sader R, Millesi G, Thieringer F, Prestes de Camargo Filho G, Guerra RC.   +6 more
europepmc   +1 more source

New Results From the Pre‐Pottery Neolithic Site of Al Uyaynah, Tabuk, in Northwestern Saudi Arabia

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Al Uyaynah is a low sandstone mound on an alluvial plain, long known for its extensive surface remains of stone‐built circular and rectangular structures. Following test excavations in 2012, more detailed excavation was undertaken in 2016 within one of the largest rectangular stone structures.
Khalid Alasmari, Stephanie F. Piper, Kirsten Grothe, W. Derek Hamilton, Delphine Joly, Penny Bickle, Geoff Bailey   +6 more
wiley   +1 more source

Mechanically-foldable axial flow blood pump: response-surface-based structural optimization and hemolytic performance evaluation. [PDF]

Front Physiol
Ji T, Jing T, Cheng J.
europepmc   +1 more source

What can lithics tell us about food production during the transition to farming? Exploring harvesting practices and cultural changes during the neolithic in Southwest Asia: a view from Qminas (north‐western Syria)

Archaeometry, EarlyView.
Abstract This study examines the continuity and change in harvesting practices between the Late Pre‐Pottery Neolithic B (LPPNB) and the Early Pottery Neolithic at Qminas, north‐western Levant, through a traceological analysis of flint sickles. By combining qualitative traceological analysis with quantitative functional approaches, we demonstrate that ...
Fiona Pichon, Osamu Maeda, Juan José Ibáñez Estévez, Patricia Anderson   +3 more
wiley   +1 more source

Investigation on rub-impact response characteristics of gas generator rotor system under external excitation. [PDF]

Sci Rep
Zhang H, Liu T, Zhao H, Wang Q.
europepmc   +1 more source

Edge Sharpness Does Not Vary Between Palaeolithic Flake Technologies, With the Possible Exception of Levallois Débitage

Archaeometry, EarlyView.
ABSTRACT Investigating why hominins adopted particular flake technologies during the Mid‐to‐Late Pleistocene is essential to understanding patterns of lithic innovation. This period witnessed the emergence of Levallois technologies (~350–250 ka) and later blades, each “replacing” earlier forms.
Anna Mika, Alastair Key
wiley   +1 more source

Study of the Noise Reduction Mechanism of Bionic Circular Arch Structures on the Blades of a High-Volumetric-Airflow Axial Flow Fan. [PDF]

Biomimetics (Basel)
Shen C, Hu S, Xu D, Zhang C, Sun X, Cheng W.   +5 more
europepmc   +1 more source

Intraocular Metastasis: Differential Diagnosis and Management

Clinical &Experimental Ophthalmology, EarlyView.
ABSTRACT Intraocular metastases represent the most common type of malignant intraocular tumour in adults. These commonly affect the choroid but can also involve the iris, ciliary body, retina, vitreous, optic disc or lens. Breast and lung cancer are the most common origins of intraocular metastases.
Genovefa Μachairoudia, Dimitrios Kazantzis, Guy S. Negretti, Mandeep S. Sagoo   +3 more
wiley   +1 more source

Investigation of cavity rotor tips on the flow field of a low-speed turbine under different conditions. [PDF]

Sci Rep
Xiao A, Ma H, Yang Y, Zhang Q, Li Z.
europepmc   +1 more source