Results 71 to 80 of about 268 (261)
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
Application of iodine plasma for electric propulsion
Авіаційно-космічна техніка та технологіяMost state-of-the-art electric space propulsion systems, such as gridded and Hall effect thrusters, use xenon as the propellant gas. However, xenon is very rare and expensive to produce, and it is used in a number of competing industrial applications ...
Sai Vigness Ramasamy, Leonid Bazyma
doaj +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
Archaeological Prospection, EarlyView.ABSTRACT Ancient Olympia was one of the most important sanctuaries and the venue for the Olympic Games in Greek and Roman times. Its remains are located in the Olympia Terrace (Peloponnese, Greece) at the present‐day confluence of the rivers Alpheios and Kladeos at the base of Mount Kronos.
Sarah Bäumler +10 more
wiley +1 more source
AerospaceHall thrusters are plasma-based devices that have established themselves as one of the most attractive and mature electric propulsion technologies for space applications.
Luca Leporini +3 more
doaj +1 more source
A man of his time: Joseph Leidy, racial science, and American anatomy
Anatomical Sciences Education, EarlyView.Abstract Professor Joseph Leidy M.D. was arguably the most influential anatomist in the nineteenth‐century United States, having written over 500 publications and serving as the first President of the Association of American Anatomists. While many of Leidy's diverse contributions to American science and medicine are well‐known, scholars have said much ...
Christopher D. E. Willoughby
wiley +1 more source
British Educational Research Journal, EarlyView.Abstract There is much interest in the potential for an alternative funding system for higher education students in England to support the spiritual and worldly needs of British Muslim students. At the heart of this issue lies a tension over whether the student financing system in English HE is haram, or forbidden under Islamic (Shari'ah) law, because ...
Richard Hall +2 more
wiley +1 more source
Lessons from primary school students' perceptions of the factors that influence school connectedness
British Educational Research Journal, EarlyView.Abstract School connectedness is critical to improving students' health, development and wellbeing. Research into primary school students' perceptions of the factors that influence their sense of connectedness is essential for identifying practices that promote success.
Jordana F. Hoenig, Therese M. Cumming
wiley +1 more source
Interplanetary Mission Performance Assessment of a TANDEM Electric Thruster-Based Spacecraft
Applied SciencesThe aim of this paper is to analyze the transfer performance of a spacecraft equipped with a TANDEM electric propulsion system in a classical interplanetary mission scenario targeting Mars, Venus, or a near-Earth asteroid. The TANDEM concept is a coaxial,
Alessandro A. Quarta
doaj +1 more source
Study on inversion method of wall erosion information of on-orbit Hall thruster based on low-frequency oscillation signals and neural networks. [PDF]
Heliyon, 2022 Han K +7 more
europepmc +1 more source