Results 131 to 140 of about 12,411 (357)
The Anatomical Record, EarlyView.A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman +4 more
wiley +1 more source
The Anatomical Record, EarlyView.Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley +1 more source
Progress in Experimental Study of Plume Plasma Discharge Characteristics of the Hollow Cathode
气体物理With the continuous maturation and sustained application of electric propulsion technology, electric propulsion is becoming the preferred choice of space propulsion for deep space exploration missions with its high specific impulse advantage. Among them,
Jintao JIA, Long MIAO, Yugan LIAO
doaj +1 more source
Thirty percent conversion efficiency from radiofrequency power to thrust energy in a magnetic nozzle plasma thruster. [PDF]
Sci Rep, 2022 Takahashi K.
europepmc +1 more source
Performance and Facility Background Pressure Characterization Tests of NASAs 12.5-kW Hall Effect Rocket with Magnetic Shielding Thruster [PDF]
NASA's Space Technology Mission Directorate (STMD) Solar Electric Propulsion Technology Demonstration Mission (SEP/TDM) project is funding the development of a 12.5-kW Hall thruster system to support future NASA missions.
Haag, Thomas +12 more
core +1 more source
Balancing act: An autoethnographic study of one medical educator's first year as a mentor
Anatomical Sciences Education, EarlyView.Abstract Novice faculty mentors often struggle with the transition from mentee to mentor. Although they may face similar challenges, each mentor's experience and journey of professional identity formation is unique, influenced by their background, experiences, relationships, and context.
Andrew S. Cale
wiley +1 more source
Demonstration of electric micropropulsion multimodality. [PDF]
Sci Adv, 2022 Zolotukhin DB +4 more
europepmc +1 more source
Determination of the electron anomalous mobility through measurements of turbulent magnetic field in Hall thrusters [PDF]
, 2007 A. Lazurenko +5 more
openalex +1 more source
Expanded Thruster Mass Model Incorporating Nested Hall Thrusters [PDF]
53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017 Scott J. Hall +3 more
openaire +1 more source