6,058,552 research outputs found
Requirements management and control
The systems engineering process for thermal nuclear propulsion requirements and configuration definition is described in outline and graphic form. Functional analysis and mission attributes for a Mars exploration mission are also addressed
Red Rock Desert Learning Center & Wild Horse and Burro Facility: Newsletter
The mission of the Red Rock Desert Learning Center is to instill stewardship and respect by increasing knowledge and understanding of the Mojave Desert ecosystemsand cultures through a unique experiential discovery program
Red Rock Desert Learning Center & Wild Horse and Burro Facility: Frequently Asked Questions
The mission of the Red Rock Desert Learning Center is to instill stewardship and respect by increasing knowledge and understanding of the Mojave Desert ecosystems and cultures through a unique experiential discovery program
Uudenmaan vesienhoidon toimenpideohjelma vuosille 2016 â 2021
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tgĂ€rdsprogrammet för vattenvĂ„rden i Nyland innehĂ„ller uppgifter om vattnens status samt om de Ă„tgĂ€rder som krĂ€vs för att förbĂ€ttra och upprĂ€tthĂ„lla yt- och grundvattnens status under förvaltningsperioden 2016 â 2021.
Ytvattnens ekologiska status i Ă€r svag i synnerhet pĂ„ de Ă„kerdominerade avrinningsomrĂ„dena och i Finska vikens kustvatten. Ă
arnas och Àlvarnas status försÀmras sÀrskilt av eutrofiering till följd av diffus belastning, men ocksÄ av byggande, reglering och uppdÀmning. Ytvattnens kemiska status i Nyland har till stor del bedömts vara god. Den sÀmre Àn goda kemiska statusen beror i huvudsak pÄ de kvicksilverhalter i abborre som överstiger miljökvalitetsnormen.
I Nyland finns 21 grundvattenomrÄden som faststÀllts ha dÄlig kemisk status. De vanligaste orsakerna till att den kemiska statu-sen försÀmrats Àr grundvattnets kloridhalt, lösningsmedel, bekÀmpningsmedel samt bensintillsatsen MTBE.
De sammanlagda kostnaderna för de ÄtgÀrder som föreslÄs i ÄtgÀrdsprogrammet Àr 372 miljoner euro per Är. HÀrav Àr 351 mil-joner euro grund- och andra ÄtgÀrder som ska vidtas med stöd av annan lagstiftning och 20 miljoner euro ÄtgÀrder som kom-pletterar vattenvÄrden. Lagstiftningsbaserade, ekonomiska, förvaltningsmÀssiga och informationsmÀssiga styrmetoder har presenterats för att frÀmja genomförandet av ÄtgÀrderna. AnsvarsomrÄdena och samarbetsparterna för genomförandet av styr-metoderna har faststÀllts
On upper bounds on the smallest size of a saturating set in a projective plane
In a projective plane (not necessarily Desarguesian) of order
a point subset is saturating (or dense) if any point of is collinear with two points in. Using probabilistic methods, the
following upper bound on the smallest size of a saturating set in
is proved: \begin{equation*} s(2,q)\leq 2\sqrt{(q+1)\ln
(q+1)}+2\thicksim 2\sqrt{q\ln q}. \end{equation*} We also show that for any
constant a random point set of size in with is a saturating
set with probability greater than Our probabilistic
approach is also applied to multiple saturating sets. A point set is -saturating if for every point of the number of secants of through is at least , counted with
multiplicity. The multiplicity of a secant is computed as
The following upper bound on the smallest
size of a -saturating set in is proved:
\begin{equation*} s_{\mu }(2,q)\leq 2(\mu +1)\sqrt{(q+1)\ln (q+1)}+2\thicksim
2(\mu +1)\sqrt{ q\ln q}\,\text{ for }\,2\leq \mu \leq \sqrt{q}. \end{equation*}
By using inductive constructions, upper bounds on the smallest size of a
saturating set (as well as on a -saturating set) in the projective
space are obtained.
All the results are also stated in terms of linear covering codes.Comment: 15 pages, 24 references, misprints are corrected, Sections 3-5 and
some references are adde
The Redistribution of Efficiency Gains: Transfers or Tariffs?
This paper is concerned with some theoretical issues in cooperative multilateral trade policy reform. The focus of the paper is on the structure of the policy reform problem, particularly as it applies to piecemeal policy reform, and on the similarity in roles that can be played by income transfers on the one hand and tariffs reforms on the other as redistributive policy instruments. More specifically, the paper is concerned with the mechanism by which efficiency gains arising out of trade policy reforms can be distributed amongst countries to achieve a strict Pareto improvement in welfare. Traditionally, trade theorists have assumed the existence of lump sum income transfers to distribute efficiency gains. Turunen-Red and Woodland (2000) have shown that income transfers accompanying quota reforms can be replaced by suitable multilateral tariff reforms to achieve the same welfare outcome. In the current paper, we generalize this idea to deal with discrete policy reforms. And, we develop several applications to enhance understanding of the connection between tariffs and transfers. If lump sum transfers are not available policy instruments, the achievement of a strict Pareto improvement must depend on changes in distortionary taxes, such as domestic taxes or tariffs on trade. Our results show that, under a mild condition on the world trade matrix, it does not matter whether lump sum transfers are available. Transfers can be replaced by a carefully chosen set of tariffs to achieve the same welfare outcome. This ability to replace transfers by tariffs is a result of the structure of the model of international trade: the terms of trade effects for a country and a lump sum transfers are equivalent, and there are sufficient tariff instruments to enable countries to neutralize the domestic price effects of terms of trade movements.
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