A new species of Peckia (Diptera: Sarcophagidae) from Costa Rica : with a note on P. pexata (Wulp)

A new species of Peckia Robineau-Desvoidy is described from the coastal dry forest of Guanacaste Province, Costa Rica, viz., Pechia glyphis sp.n., and a key to the ten species of Peckia known from the area is provided. A lectotype is designated for Pechia pexata (Wulp, 1895) and intraspecific variation in male leg setosity and in the morphology of male terminalia are documented

Hertz potentials and asymptotic properties of massless fields

In this paper we analyze Hertz potentials for free massless spin-s fields on the Minkowski spacetime, with data in weighted Sobolev spaces. We prove existence and pointwise estimates for the Hertz potentials using a weighted estimate for the wave equation. This is then applied to give weighted estimates for the solutions of the spin-s field equations, for arbitrary half-integer s. In particular, the peeling properties of the free massless spin-s fields are analyzed for initial data in weighted Sobolev spaces with arbitrary, non-integer weights.Comment: Regularity assumptions corrected. Orthogonality condition eliminate

Income From Separate Property: Towards a Theoretical Foundation

The characterization of the rents, issues and profits from separate property brought into or acquired during marriage is discussed. There has been no comprehensive treatment of this issue in community property case law and literature in recent years

Spin geometry and conservation laws in the Kerr spacetime

In this paper we will review some facts, both classical and recent, concerning the geometry and analysis of the Kerr and related black hole spacetimes. This includes the analysis of test fields on these spacetimes. Central to our analysis is the existence of a valence $(2,0)$ Killing spinor, which we use to construct symmetry operators and conserved currents as well as a new energy momentum tensor for the Maxwell test fields on a class of spacetimes containing the Kerr spacetime. We then outline how this new energy momentum tensor can be used to obtain decay estimated for Maxwell test fields. An important motivation for this work is the black hole stability problem, where fields with non-zero spin present interesting new challenges. The main tool in the analysis is the 2-spinor calculus, and for completeness we introduce its main features.Comment: 30 pages. To appear in the volume "The Centenary of General Relativity" in "Surveys in Differential Geometry", edited by Lydia Bieri and Shing-Tung Yau, in the series "Surveys in Differential Geometry

Simulating the Future Pension Wealth and Retirement Saving in Sweden

In this paper the wealth consequences of the Swedish pension system in the transition from a defined benefit to notional defined contribution system are simulated with almost exact institutional detail, using life cycle profiles estimated from detailed longitudinal micro data. Projected wealth, including different types of pension wealth, are computed and compared between cohorts, gender, wealth deciles and occupational categories. Consistent saving rates and replacement rates allowing consumption to stay constant after retirement are computed. Two different macroeconomic scenarios are considered, one using stylised values for growth, inflation etc. and another using demographically based forecasts. Some conclusions are that the cohorts born in the 1940s are relatively favoured, and so are the wealthiest deciles. Stylised macro assumptions yield more optimistic wealth projections than those corresponding to demographically based projections.Future Pension Wealth; Retirement Saving in Sweden

Maximum observable correlation for a bipartite quantum system

The maximum observable correlation between the two components of a bipartite quantum system is a property of the joint density operator, and is achieved by making particular measurements on the respective components. For pure states it corresponds to making measurements diagonal in a corresponding Schmidt basis. More generally, it is shown that the maximum correlation may be characterised in terms of a `correlation basis' for the joint density operator, which defines the corresponding (nondegenerate) optimal measurements. The maximum coincidence rate for spin measurements on two-qubit systems is determined to be (1+s)/2, where s is the spectral norm of the spin correlation matrix, and upper bounds are obtained for n-valued measurements on general bipartite systems. It is shown that the maximum coincidence rate is never greater than the computable cross norm measure of entanglement, and a much tighter upper bound is conjectured. Connections with optimal state discrimination and entanglement bounds are briefly discussed.Comment: Revtex, no figure

Sveriges val i ett integrerat Europa

Den här rapporten analyserar Sveriges val mellan en optimal anpassning till EG och medlemskap med hänsyn till värdet av svenskt manöverutrymme respektive inflytande på EGs beslut. Vad gäller handelspolitiken kan Sverige i teorin vara mer öppet utanför EG, men i praktiken förhindras detta av behovet att få tillgång till EGs fyra friheter, utan vilka Sverige går miste om investeringar, arbetstillfällen och teknologi. Vidare talar behoven av internationellt samarbete vad gäller miljön, strukturomvandling och ökad konkurrens i Sverige till fördel för medlemskap, medan faran av en svårhanterlig EG-byråkrati kan tala emot. Avslutningsvis konstateras att EG-debatten behöver analyseras i ett samhällsekonomiskt perspektiv, och ämnen för fortsatt forskning presenteras