IV-VI semiconductor quaternary alloys lattice matched with BaF2 substrates have been grown by liquid phase ,epitaxy. X-ray diffraction analysis shows that liquid (Pbl-,~Sn,L)0.99(Sel--YLTe~L)0.01 solutions produce Pbt -+Sn,,Ser -rsTey, alloys lattice matched with the substrate when yL=60%, SS%, and 57%, and x,=20%, 40%, and 60%, respectively. These data, which can be used to fabricate lattice-m...

The selection of breeding sites in heterogeneous habitats should ideally be based on cues closely reflecting habitat quality and thus predicting realized individual fitness. Using long-term population data and data on territory establishment of male Northern Wheatears (Oenanthe oenanthe), we examined whether territory characteristics linked to individual fitness (reproductive performance and su...

We examine the nonideal behavior of real vapor in the context of the theory of nonin-teracting molecular clusters. The vapor is treated as a perfect mixture of clusters, which in equilibrium attain a distribution in size determined by formation energies G i , where G i is the energy required to form a cluster of i molecules from i molecules in bulk saturated liquid. A theory for the G i gives a...