Results 121 to 130 of about 215,489 (356)

渐开线少齿数齿轮齿形系数和应力修正系数的实验研究

open access: yesJixie chuandong, 2007
Experiment reseach about involute gear’s tooth form factor and stress correction factor by applying 30o tangent method is carried out. Tooth profile generating experiment to teeth number is carried out, measury tooth root chord at the critical section ...
孙伏, 张杰, 陈应舒
doaj  

Hidden Markov random field and FRAME modelling for TCA-image analysis [PDF]

open access: yes
Tooth Cementum Annulation (TCA) is an age estimation method carried out on thin cross sections of the root of human teeth. Age is computed by adding the tooth eruption age to the count of annual incremental lines that are called tooth rings and appear in
Francesco Lagona, Katy Streso
core  

Early synapsids neurosensory diversity revealed by CT and synchrotron scanning

open access: yesThe Anatomical Record, EarlyView.
Abstract Non‐mammaliaform synapsids (NMS) represent the closest relatives of today's mammals among the early amniotes. Exploring their brain and nervous system is key to understanding how mammals evolved. Here, using CT and Synchrotron scanning, we document for the first time three extreme cases of neurosensory and behavioral adaptations that probe ...
J. Benoit   +6 more
wiley   +1 more source

Functional morphology of the pharyngeal teeth of the ocean sunfish, Mola mola

open access: yesThe Anatomical Record, EarlyView.
Abstract Many fish use a set of pharyngeal jaws in their throat to aid in prey capture and processing, particularly of large or complex prey. In this study—combining dissection, CT scanning, histology, and performance testing—we demonstrate a novel use of pharyngeal teeth in the ocean sunfish (Mola mola), a species for which pharyngeal jaw anatomy had ...
Benjamin Flaum   +3 more
wiley   +1 more source

Fatigue crack initiation and growth in a tooth root of sintered gears

open access: diamond, 2022
Aljaž Ignatijev   +3 more
openalex   +1 more source

Predicting ecology and hearing sensitivities in Parapontoporia—An extinct long‐snouted dolphin

open access: yesThe Anatomical Record, EarlyView.
Abstract Analyses of the cetacean (whale and dolphin) inner ear provide glimpses into the ecology and evolution of extinct and extant groups. The paleoecology of the long‐snouted odontocete (toothed whale) group, Parapontoporia, is primarily marine with its depositional context also suggesting freshwater tolerance.
Joyce Sanks, Rachel Racicot
wiley   +1 more source

Several Questions about Gear Single Tooth Pulsating Bending Fatigue Test

open access: yesJixie chuandong, 2017
The methods of the tooth root bending fatigue test both at home and abroad are introduced,and several questions about single tooth pulsating test are explained and discussed,such as ensure the load distribution along tooth length direction,clamped tooth ...
Liu Ziqiang, Chen Liang, Wan Wenming
doaj  

Evaluation of root development of mandibular first molar of children (6-12) years old visiting P.O.P. department College of Dentistry/ Hawler Medical University.

open access: yesErbil Dental Journal, 2023
Background and objective: With FPMs between the ages of 6 and 12, the detection of open apex in some children at age 12 underlines the necessity for investigation prior to treating a deep carious lesion.Pulpal involvement was considered before the ...
Yara Ismail Ameen   +2 more
doaj  

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