Results 81 to 90 of about 3,371,346 (222)

Property Rights Entrepreneurship: The Drive for Product, Asset, and Resource Excludability

Managerial and Decision Economics, EarlyView.
ABSTRACT Property rights are foundational to market economies, and entrepreneurial activity depends heavily on the excludability afforded by property rights. Yet, the role of entrepreneurs in shaping the evolution of property rights has been so thoroughly taken for granted that it often vanishes from analyses.
Thomas J. Dean, William R. Forster, Nicholas Dew   +2 more
wiley   +1 more source

Planetary system evolution: Planet-disk interactions and planet ejection from binary systems [PDF]

, 2007
Throughout the evolution of a planetary system, planets, especially those newly formed, interact by several means with a variety of the system's constituents. In particular, the influence of the most massive planets is expected to govern much of the
Mudryk, Lawrence Russell
core   +1 more source

Dynamical Analysis of the HD 169142 Planet-forming Disk: Twelve Years of High-contrast Polarimetry

The Astronomical Journal
We present a dynamical analysis of the HD 169142 planet-forming disk based on high-contrast polarimetric imaging over a twelve-year observational period, offering insights into its disk evolution and planet–disk interactions.
Miles Lucas, Michael Bottom, Ruobing Dong, Myriam Benisty, Mario Flock, Maria Vincent, Jonathan Williams, Kyohoon Ahn, Thayne Currie, Vincent Deo, Olivier Guyon, Tomoyuki Kudo, Lucinda Lilley, Julien Lozi, Maxwell Millar-Blanchaer, Barnaby Norris, Sebastián Pérez, Boris Safonov, Peter Tuthill, Taichi Uyama, Sébastien Vievard, Manxuan Zhang   +21 more
doaj   +1 more source

Computational Analysis of the Vibrational Response of Lunar Regolith Made of Nonspherical Grains

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Vibration‐based systems have shown that appropriately oriented and tuned mechanical oscillations can disrupt regolith interlocking and promote flow. Building on this evidence, the present study investigates vibration‐controlled granular discharge as a potential ISRU (In Situ Resource Utilization) strategy, with the aim of supporting ...
Lewis Traquair, Peter Watson, Ali Anwar, Sebastien Vincent Bonnieu, Marcello Lappa   +4 more
wiley   +1 more source

Planetary nebulae and determination of the bulge-disk boundary

, 2012
In this paper, a sample of planetary nebulae in the Galaxy's inner-disk and bulge is used to find the galactocentric distance that optimally separates these two populations in terms of their abundances.
Costa, Roberto Dell' Aglio Dias da, Moraes, Oscar Cavichia de, Maciel, Walter Junqueira   +2 more
core   +1 more source

Water Enrichment of Forming Sub-Neptune Envelopes Limited by Oxygen Exhaustion

The Astrophysical Journal
The interaction between a magma ocean and a primordial atmosphere is increasingly recognized as a key process in shaping planetary envelope compositions.
Tadahiro Kimura, Tim Lichtenberg
doaj   +1 more source

An Open Database of Lunar Regolith and Simulants Properties

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Lunar regolith, the layer of unconsolidated material covering the Moon's surface, is central to the science and technology developed for the Moon, notably related to in‐situ science investigations, resource utilization, surface infrastructure, and mobility systems.
Léonie Gasteiner, Naomi Murdoch, Olfa D'Angelo   +2 more
wiley   +1 more source

Environmental interactions in class II systems and their impact on the disk-planet architecture

Astronomy & Astrophysics
Context. Protoplanetary disks evolve in clustered environments where interactions with nearby stars and interstellar gas are common. Such environmental processes, including stellar flybys and gas infall, can significantly perturb disk structures over a ...
Poblete Pedro P., Cuello Nicolás, Pearce Tim D., Alaguero Antoine, Calcino Josh, Price Daniel J., Kuffmeier Michael   +6 more
doaj   +1 more source

Influence of Fracture Volumetric Intensity on Strength Anisotropy of Foliated Rock Masses: Insights From a Synthetic Rock Mass Modeling Approach

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT This paper presents a synthetic rock mass (SRM) methodology to investigate the influence of fracture volumetric intensity (P32$P_{32}$) on the strength anisotropy of foliated rock masses containing non‐persistent fracture sets. The approach integrates UAV‐based discontinuity mapping, discrete fracture network (DFN) modeling, and lattice‐spring
G. G. de Magalhães, P. P. Cacciari, L. Li   +2 more
wiley   +1 more source

Interactions between the Planetary Magnetic Field and the Surrounding Gas Flows in the Final Stage of the Giant Planet Formation. I. Two Distinct Evolutionary Scenarios

The Astrophysical Journal
Motivated by recent studies of magnetospheric accretion and hints of planet-driven outflows associated with forming giant planets, we investigate the interactions between the planetary magnetic field and the surrounding gas flows during its final ...
Pengfei Tang, Xiaogang Wang, Tianchun Zhou, Jiayong Zhong   +3 more
doaj   +1 more source