Results 61 to 70 of about 6,355,244 (249)

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

The Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri, Humberto L. Andrelino, Sergio Bogan, José P. O'Gorman, Federico Agnolín, Brian L. Sidlauskas, Nahuel Vega, Agustín G. Martinelli, José L. Birindelli   +8 more
wiley   +1 more source

Evolutionary radiation of large‐bodied gorgonopsians from the lower Abrahamskraal formation of South Africa

The Anatomical Record, EarlyView.
Abstract The middle Permian represents a critical interval in therapsid evolution, when gorgonopsians emerged as some of the first specialized apex predators within terrestrial ecosystems. Despite their significance, the early diversification of Gorgonopsia in Gondwana remains poorly understood due to scarcity and fragmentary material.
Zanildo Macungo, Ricardo Araújo, Bruce S. Rubidge, Michael O. Day, Kathleen N. Dollman, Julien Benoit   +5 more
wiley   +1 more source

Research on Design Method of Bionic Tooth Profile High-torque Synchronous Pulley

Jixie chuandong, 2020
Aiming at the influence of the tooth profile of the synchronous pulley on the bearing capacity of the pulley， a design method of a high-torque bionic tooth profile synchronous pulley is proposed.
Shuai Mo, Lijuan Shi, Zongxiang Yue, Xiaolin Cao, Yunsheng Huang   +4 more
doaj  

Analytical Model of Air-Gap Field in Hybrid Excitation and Interior Permanent Magnet Machine for Electric Logistics Vehicles

IEEE Access, 2020
With the increasing energy shortages and environmental degradation, electric logistics vehicle (ELVs) with energy conservation and environmental protection has become a research hotspot. The design of machine is the key to develop ELVs.
Wenjing Hu, Xueyi Zhang, Yulong Lei, Qinjun Du, Liwei Shi, Guodong Liu   +5 more
doaj   +1 more source

Characterization of biominerals in the radula teeth of the chiton, Acanthopleura hirtosa [PDF]

, 2009
Understanding biomineralization processes provides a route to the formation of novel biomimetic materials with potential applications in fields from medicine to materials engineering.
Macey, D.J., Clode, P.L., Saunders, M., Kong, C., Shaw, J.A.   +4 more
core  

Postcranial anatomy and osteohistology of an early prozostrodont cynodont from the Upper Triassic of Brazil

The Anatomical Record, EarlyView.
Abstract Prozostrodon brasiliensis, a probainognathian cynodont of the clade Prozostrodontia, is recognized as a key taxon for understanding the origin of Mammaliaformes and mammals. Despite detailed investigations of its cranial anatomy, the postcranial skeleton has received comparatively less attention.
Iasmim M. Michelotti, Lívia Roese‐Miron, Brodsky Dantas Macedo Farias, Marina Bento Soares, Leonardo Kerber   +4 more
wiley   +1 more source

Reconfiguration of Distribution Power Systems Using Heuristic Optimization Algorithms

Reconfiguration of the power distribution system allows for minimal real power losses and compliance with the required bus voltage limits of the power system.
Umut Emre Uzun, Diana Akmayeva, Nihat Pamuk   +2 more
core   +1 more source

Developmental differences in cortical bone structure in chimpanzee and human femora reflect early locomotor independence in humans

The Anatomical Record, EarlyView.
Abstract The cortical bone structure of long bone diaphyses changes throughout growth via skeletal modeling and has important implications for bone strength and structural integrity. Ontogenetic trends in diaphyseal structure have been identified in both chimpanzees and humans but it is not yet clear how these trends compare given notable differences ...
Karen R. Swan, Rachel Ives, Zewdi J. Tsegai, Louise T. Humphrey   +3 more
wiley   +1 more source

Analysis of the Influence of Parameters in Asymmetric Gear with a Small Teeth Number on Temperature Field

Jixie chuandong, 2017
The distribution of the gear temperature field has a significant impact on the gear tooth surface gluing failures,which have a significant impact on the reliability and gear service life.
Chen Ting
doaj  

Design and Experimental Validation for Direct-Drive Fault-Tolerant Permanent-Magnet Vernier Machines

The Scientific World Journal, 2014
A fault-tolerant permanent-magnet vernier (FT-PMV) machine is designed for direct-drive applications, incorporating the merits of high torque density and high reliability.
Guohai Liu, Junqin Yang, Ming Chen, Qian Chen   +3 more
doaj   +1 more source