Results 81 to 90 of about 20,805,604 (297)

Nocturnal Behavior of Wintering Common Cranes (Grus grus) Under Varying Environmental Conditions

Integrative Zoology, EarlyView.
For diurnal species, nighttime represents a critical ecological boundary. Understanding the ecological determinants of nocturnal activity in taxa traditionally regarded as inactive after dusk is essential for elucidating the adaptive significance of nighttime behavior. We examined how night phase, nocturnal brightness (moon illumination and cloud cover)
Flavio Monti, Marco Ciolfi, Giuseppe Anselmi, Niccolò Fattorini, Francesco Ferretti   +4 more
wiley   +1 more source

Thermal Analysis of the Driving Component Based on the Thermal Network Method in a Lunar Drilling System and Experimental Verification

Energies, 2017
The main task of the third Chinese lunar exploration project is to obtain soil samples that are greater than two meters in length and to acquire bedding information from the surface of the moon.
Dewei Tang, Hong Xiao, Fanrui Kong, Zongquan Deng, Shengyuan Jiang, Qiquan Quan   +5 more
doaj   +1 more source

We Don't Settle: Decolonizing the Heritage Sector by Empowering Young People of Color

Curator: The Museum Journal, EarlyView.
ABSTRACT Decolonizing the heritage sector has taken center stage since the murder of George Floyd and the subsequent Black Lives Matter protests. There have been efforts for decades to make the sector address institutional racism and be more inclusive to racialized minorities.
Kehinde Andrews, Hannah Adereti, Aida Fofana, Tara Hilton, Kadian Pow   +4 more
wiley   +1 more source

Leadership and Accountability in Faith‐Based Institutions: Evidence From UK Mosques

Financial Accountability &Management, EarlyView.
ABSTRACT This study investigates accountability in religious institutions on the basis of evidence obtained from interviews with relevant parties in UK mosques. We mobilize prior theoretical contention regarding servant leadership and constraints on personal accountability to expose perceptions of seriously deficient discharge outcomes.
Umair Riaz, Anwar Halari, Bruce Burton, Theresa Dunne   +3 more
wiley   +1 more source

Rapid SLAM Method for Star Surface Rover in Unstructured Space Environments

Aerospace
The space environment is characterized by unstructured features, sparsity, and poor lighting conditions. The difficulty in extracting features from the visual frontend of traditional SLAM methods results in poor localization and time-consuming issues ...
Zhengpeng Zhang, Yan Cheng, Lijing Bu, Jiayan Ye   +3 more
doaj   +1 more source

Impact of light pollution on fishes: Mechanisms and ecological consequences

Journal of Fish Biology, EarlyView.
Abstract The increasing prevalence of artificial light at night (ALAN) is of growing ecological concern. By altering natural light regimes, ALAN affects the behaviour, physiology and life‐history of organisms. While research has largely focused on terrestrial ecosystems, aquatic ecosystems are increasingly exposed.
Hanxi Chen, Ulrika Candolin
wiley   +1 more source

Kinematic analysis of the European Enhanced Exploration Exercise Device in unpowered mode

npj Microgravity
Unlike earlier short-duration lunar missions, current exploration-class missions include extended periods of microgravity exposure prior to lunar surface operations.
Christian Winther Nielsen, Anne Villekjær Østerballe, Rasmus Leisgaard Tougaard, Jennifer Struble, Ryan Godsk Larsen, Bernd Lohmann, Patrick Jaekel, Tobias Weber, Mark de Zee, Enrico De Martino   +9 more
doaj   +1 more source

Performance improvement of radioisotope thermoelectric generators (RTGs) by design optimization

Energy Conversion and Management: X
Lunar exploration requires a continuous supply of electrical power, independent of solar irradiation availability. This can be provided by Radioisotope Thermoelectric Generators (RTG) which have been successfully deployed in various deep-space missions ...
Stylianos Kyrimis, Eliott Lallemand, Christian Stiewe, Pawel Ziolkowski, Aidan Cowley, Eckhard Müller, Johannes de Boor   +6 more
doaj   +1 more source

A navigation simulation system of lunar rover

, 2008
This paper presents a navigation simulation system on lunar rover. With virtual reality technology, this system serves to verify the kinematics model and the validity of the planning-path for navigating lunar rover.
Liu J(刘霁), Zhou C(周船), Geng YF(耿沿锋), Wang YC(王越超), Cong Y(丛杨)   +4 more
core  

Lunar base thermal management/power system analysis and design [PDF]

, 1992
A compilation of several lunar surface thermal management and power system studies completed under contract and IR&D is presented. The work includes analysis and preliminary design of all major components of an integrated thermal management system ...
Mcghee, Jerry R.
core