27,281 research outputs found
The Russian Revolutionary Emigres, 1825-1870
Originally published in 1986. Martin A. Miller, author of the definitive biography of the exiled revolutionary Peter Kropotkin, traces the history of the first generations of Russians who went to Western Europe to devote their lives to anti-tsarist politics. Refusing to assimilate abroad and unable to return home, the émigrés political orientations were influenced by intellectual and social currents in both Russia and Europe. Miller undertakes a major reassessment of the émigré contribution to the Russian revolutionary movement. Starting with Nikolai Turgenev, who in 1825 was declared the first "émigré" by a special act of the Russian government, the exiles formed a unique social and political group. Miller takes a biographical approach in tracing the progression from a disparate community of intellectuals, unable to act together to promote their own program for change, to a more cohesive second émigré generation that provided the foundation for collective action and the development of a revolutionary ideology. The creation of the Russian émigré press, Miller argues, gave identity and momentum to the émigrés and helped promote their program of revolution and a new social order. The Russian Revolutionary Emigres, 1825-1870 concludes with the death in 1870 of the leading émigré figure, Alexander Herzen, and with an analysis of the impact upon the émigrés of the emergence of the populist revolutionary movement within Russia. The émigrés overcame the loss of their homeland through their version of a future Russia, one transformed into a new society where their ideals could be realized. When, two generations later, Lenin returned to Russia after decades in Europe and made this vision a reality, his actions built on the foundation laid by his nineteenth-century predecessors
Coping with CAFOs: How Much Notice Must a Citizen Give - Community Ass\u27n for Restoration of the Environment v. Henry Bosma Dairy
In the context of reviewing Community Ass’n for Restoration of the Environment v. Henry Bosma Dairy, this Note focuses on what constitutes sufficient notice and suggests how citizen groups should handle additional violations discovered after suit has been filed. Although the Ninth Circuit had previously taken a fairly strict approach in interpreting notice requirement, Bosma Dairy indicates a shift toward a more forgiving approach by allowing the plaintiff to include certain non-noticed violations in its lawsuit. This urges the continued movement away from a rigid and formalistic approach
Coping with CAFOs: How Much Notice Must a Citizen Give - Community Ass\u27n for Restoration of the Environment v. Henry Bosma Dairy
In the context of reviewing Community Ass’n for Restoration of the Environment v. Henry Bosma Dairy, this Note focuses on what constitutes sufficient notice and suggests how citizen groups should handle additional violations discovered after suit has been filed. Although the Ninth Circuit had previously taken a fairly strict approach in interpreting notice requirement, Bosma Dairy indicates a shift toward a more forgiving approach by allowing the plaintiff to include certain non-noticed violations in its lawsuit. This urges the continued movement away from a rigid and formalistic approach
Melting and differentiation of early-formed asteroids: The perspective from high precision oxygen isotope studies
A number of distinct methodologies are available for determining the oxygen isotope composition of minerals and rocks, these include laser-assisted fluorination, secondary ion mass spectrometry (SIMS)and UV laser ablation. In this review we focus on laser-assisted fluorination, which currently achieves the highest levels of precision available for oxygen isotope analysis. In particular, we examine how results using this method have furthered our understanding of early-formed differentiated meteorites. Due to its rapid reaction times and low blank levels, laser-assisted fluorination has now largely superseded the conventional externally-heated Ni “bomb” technique for bulk analysis. Unlike UV laser ablation and SIMS analysis, laser-assisted fluorination is not capable of focused spot analysis. While laser fluorination is now a mature technology, further analytical improvements are possible via refinements to the construction of sample chambers, clean-up lines and the use of ultra-high resolution mass spectrometers.
High-precision oxygen isotope analysis has proved to be a particularly powerful technique for investigating the formation and evolution of early-formed differentiated asteroids and has provided unique insights into the interrelationships between various groups of achondrites. A clear example of this is seenin samples that lie close to the terrestrial fractionation line (TFL). Based on the data from conventional oxygen isotope analysis, it was suggested that the main-group pallasites, the howardite eucrite diogenite suite (HEDs) and mesosiderites could all be derived from a single common parent body. However,high precision analysis demonstrates that main-group pallasites have a Δ17O composition that is fully resolvable from that of the HEDs and mesosiderites, indicating the involvement of at least two parent bodies. The range of Δ17O values exhibited by an achondrite group provides a useful means of assessing the extent to which their parent body underwent melting and isotopic homogenization. Oxygen isotope analysis can also highlight relationships between ungrouped achondrites and the more well-populated groups. A clear example of this is the proposed link between the evolved GRA 06128/9 meteorites and the brachinites.
The evidence from oxygen isotopes, in conjunction with that from other techniques, indicates that we have samples from approximately 110 asteroidal parent bodies (∼60 irons, ∼35 achondrites and stony-iron, and ∼15 chondrites) in our global meteorite collection. However, compared to the likely size of the original protoplanetary asteroid population, this is an extremely low value. In addition, almost all of the differentiated samples (achondrites, stony-iron and irons) are derived from parent bodies that were highly disrupted early in their evolution.
High-precision oxygen isotope analysis of achondrites provides some important insights into the origin of mass-independent variation in the early Solar System. In particular, the evidence from various primitive achondrite groups indicates that both the slope 1 (Y&R) and CCAM lines are of primordial significance. Δ17O differences between water ice and silicate-rich solids were probably the initial source of the slope 1 anomaly. These phases most likely acquired their isotopic composition as a result of UV photo-dissociation of CO that took place either in the early solar nebula or precursor giant molecular cloud. Such small-scale isotopic heterogeneities were propagated into larger-sized bodies, such as asteroids and planets, as a result of early Solar System processes, including dehydration, aqueous alteration,melting and collisional interactions
Comment on "A centroid molecular dynamics study of liquid para hydrogen and ortho deuterium" [J. Chem. Phys. 121, 6412 (2004)]
We show that the two phase points considered in the recent simulations of liquid para hydrogen by Hone and Voth lie in the liquid-vapor coexistence region of a purely classical molecular dynamics simulation. By contrast, their phase point for ortho deuterium was in the one-phase liquid region for both classical and quantum simulations. These observations are used to account for their report that quantum mechanical effects enhance the diffusion in liquid para hydrogen and decrease it in ortho deuterium
Connection between the elastic GEp/GMp and P to Delta form factors
It is suggested that the falloff in Qsq of the P to Delta magnetic form
factor GM* is related to the recently observed falloff of the elastic electric
form factor GEp/GMp. Calculation is carried out in the framework of a GPD
mechanism
A practical model of convective dynamics for stellar evolution calculations
Turbulent motions in the interior of a star play an important role in its
evolution, since they transport chemical species, thermal energy and angular
momentum. Our overall goal is to construct a practical turbulent closure model
for convective transport that can be used in a multi-dimensional stellar
evolution calculation including the effects of rotation, shear and magnetic
fields. Here, we focus on the first step of this task: capturing the well-known
transition from radiative heat transport to turbulent convection with and
without rotation, as well as the asymptotic relationship between turbulent and
radiative transport in the limit of large Rayleigh number. We extend the
closure model developed by Ogilvie (2003) and Garaud and Ogilvie (2005) to
include heat transport and compare it with experimental results of
Rayleigh-Benard convection.Comment: Conference proceeding for poster at conference "Unsolved problems in
Stellar Physics
The 2s atomic level in muonic 208-Pb
Relative intensities and energy measurements of 2s level in muonic Pb-20
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