"Dust" on the Moon

The dust halo of Saturn's largest icy moon, Rhea.

Saturn's moon Rhea had been considered massive enough to retain a thin, externally generated atmosphere capable of locally affecting Saturn's magnetosphere. The Cassini spacecraft's in situ observations reveal that energetic electrons are depleted in the moon's vicinity. The absence of a substantial exosphere implies that Rhea's magnetospheric interaction region, rather than being exclusively i...

Talking on the Moon

How effective, efficient and natural human-robot interaction can be depends for an important part on how meaning can be shared and construed between a human and a robot. The paper presents an initial investigation in the architectural functions that appear to underly embodied, situated understanding in joint action and interaction. The identified functions are combined into a concept system arc...

survey on the rule of the due & hindering relying on the sheikh ansaris ideas

قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...

The Chemical Reactivity of Lunar Dust Relevant to Human Exploration of the Moon

Characterizing and Understanding the Interaction of Dust and Plasma on the Surface of the Moon and in the Exosphere

of Science Topic: The ambient plasma environment and solar UV at the Moon cause the regolith on the lunar surface to become electrically charged [1–3]. This can result in the electrostatic transport of charged dust (< 10 μm) in the lunar exosphere, which has been observed to reach altitudes >100 km [4–6] and speeds of up to 1 km/s [7]. Value of Science Topic: From the Apollo era it is known tha...