9,068 research outputs found
A conceptual model of foreign investment : a forestry internationalization case between New Zealand and Korea : a thesis presented in partial fulfillment of the requirements for the degree of Master of Agricultural Economics at Massey University
The purpose of this thesis is to explore comprehensive, strategic investment structure by examining the factor interactions revolving around the current issues which confront New Zealand forestry internationalisation in the global economic perspectives. This thesis presents the prototype of a conceptual model of international forestry as a modified joint venture\ trust system by examining the existing institutional and legal structure. Considering the global, conceptual nature of this thesis, macro-theoretical and institutional approach were adopted instead of statistical, micro analysis. In order to derive a micro, realistic solution from the macro, global issues, the flow of basic logic and scope of this research has been advanced progressively such as Worldwide (global) --- Asia Pacific Rim (multilateral) Bilateral (eg., New Zealand versus Korea) --- Bilateral arrangement (eg., modified joint venture \ Trust system). Also, basic components and scenarios which are useful to seek out alternatives were proposed to solve the current problems which face New Zealand forestry. The conceptual model which is proposed in this thesis could be tested and applied not only in bilateral but also in multilateral trade and investment relationships by modifying it to adjust to specific circumstances. In this way, the credibility gap between the conceptual model and real world is greatly diminished. Ultimately, the conceptual model could contribute as a useful mechanism to analyse international factor mobility between resource-demanding and supplying countries
On Fields of rationality for automorphic representations
This paper proves two results on the field of rationality \Q(\pi) for an
automorphic representation , which is the subfield of \C fixed under the
subgroup of \Aut(\C) stabilizing the isomorphism class of the finite part of
. For general linear groups and classical groups, our first main result is
the finiteness of the set of discrete automorphic representations such
that is unramified away from a fixed finite set of places,
has a fixed infinitesimal character, and [\Q(\pi):\Q] is bounded. The second
main result is that for classical groups, [\Q(\pi):\Q] grows to infinity in a
family of automorphic representations in level aspect whose infinite components
are discrete series in a fixed -packet under mild conditions
Families of L-functions and their Symmetry
In [90] the first-named author gave a working definition of a family of
automorphic L-functions. Since then there have been a number of works [33],
[107], [67] [47], [66] and especially [98] by the second and third-named
authors which make it possible to give a conjectural answer for the symmetry
type of a family and in particular the universality class predicted in [64] for
the distribution of the zeros near s=1/2. In this note we carry this out after
introducing some basic invariants associated to a family
Observation of Topologically Stable 2D Skyrmions in an Antiferromagnetic Spinor Bose-Einstein Condensate
We present the creation and time evolution of two-dimensional Skyrmion
excitations in an antiferromagnetic spinor Bose-Einstein condensate. Using a
spin rotation method, the Skyrmion spin textures were imprinted on a sodium
condensate in a polar phase, where the two-dimensional Skyrmion is
topologically protected. The Skyrmion was observed to be stable on a short time
scale of a few tens of ms but to have dynamical instability to deform its shape
and eventually decay to a uniform spin texture. The deformed spin textures
reveal that the decay dynamics involves breaking the polar phase inside the
condensate without having topological charge density flow through the boundary
of the finite-sized sample. We discuss the possible formation of half-quantum
vortices in the deformation process.Comment: 5 pages, 5 figure
Supercuspidal part of the mod l cohomology of GU(1,n - 1)-Shimura varieties
Let l be a prime. In this paper we are concerned with GU(1,n - 1)-type Shimura varieties with arbitrary level structure at l and investigate the part of the cohomology on which G(ℚ[subscript p]) acts through mod l supercuspidal representations, where p ≠ l is any prime such that G(ℚ[subscript p]) is a general linear group. The main theorem establishes the mod l analogue of the local-global compatibility. Our theorem also encodes a global mod l Jacquet–Langlands correspondence in that the cohomology is described in terms of mod l automorphic forms on some compact inner form of G
Quantum Hamiltonian Complexity
Constraint satisfaction problems are a central pillar of modern computational
complexity theory. This survey provides an introduction to the rapidly growing
field of Quantum Hamiltonian Complexity, which includes the study of quantum
constraint satisfaction problems. Over the past decade and a half, this field
has witnessed fundamental breakthroughs, ranging from the establishment of a
"Quantum Cook-Levin Theorem" to deep insights into the structure of 1D
low-temperature quantum systems via so-called area laws. Our aim here is to
provide a computer science-oriented introduction to the subject in order to
help bridge the language barrier between computer scientists and physicists in
the field. As such, we include the following in this survey: (1) The
motivations and history of the field, (2) a glossary of condensed matter
physics terms explained in computer-science friendly language, (3) overviews of
central ideas from condensed matter physics, such as indistinguishable
particles, mean field theory, tensor networks, and area laws, and (4) brief
expositions of selected computer science-based results in the area. For
example, as part of the latter, we provide a novel information theoretic
presentation of Bravyi's polynomial time algorithm for Quantum 2-SAT.Comment: v4: published version, 127 pages, introduction expanded to include
brief introduction to quantum information, brief list of some recent
developments added, minor changes throughou
Role of thermal friction in relaxation of turbulent Bose-Einstein condensates
In recent experiments, the relaxation dynamics of highly oblate, turbulent
Bose-Einstein condensates (BECs) was investigated by measuring the vortex decay
rates in various sample conditions [Phys. Rev. A , 063627 (2014)] and,
separately, the thermal friction coefficient for vortex motion was
measured from the long-time evolution of a corotating vortex pair in a BEC
[Phys. Rev. A , 051601(R) (2015)]. We present a comparative analysis of
the experimental results, and find that the vortex decay rate is
almost linearly proportional to . We perform numerical simulations of
the time evolution of a turbulent BEC using a point-vortex model equipped with
longitudinal friction and vortex-antivortex pair annihilation, and observe that
the linear dependence of on is quantitatively accounted for
in the dissipative point-vortex model. The numerical simulations reveal that
thermal friction in the experiment was too strong to allow for the emergence of
a vortex-clustered state out of decaying turbulence.Comment: 7 pages, 5 figure
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