Regional Limnology of Japanese Lakes (Report II) Part I (3)

Limnology of the Great Lakes of Nicaragua

Basic limnology of fifty-one lakes in Costa Rica.

We visited 51 lakes in Costa Rica as part of a broad-based survey to document their physical and chemical characteristics and how these relate to the mode of formation and geographical distribution of the lakes. The four oxbow lakes were low in elevation and tended to be turbid, high in conductivity and CO2, but low in dissolved O2; one of these, L. Gandoca, had a hypolimnion essentially compos...

Part I : Part Ii : Part Iii : Part Iv

The theory of stick-slip is developed, based on the concept of a static and dynamic coefficient of friction. The dynamic coefficient is assumed to be independent of displacement and to depend wholly on normal stress across the surface. It is also assumed to be velocity-independent. The theory predicts that the stress drop during stick-slip is independent of machine stiffness. The displacement d...

Report Submitted for the Great Lakes Regional Assessment

The natural ecosystems of the region are characterized by three prominent environmental gradients. First, a southwest to northeast gradient from prairie to forest in Minnesota is largely a function of moisture availability. Second a south to north gradient from Eastern deciduous (oak-hickory) to Northern mixed hardwoods forests (beech, maple, hemlock) in Michigan and Wisconsin is a prominent la...

2 00 3 Spin Photocurrents in Quantum Wells review part II , ( part I : cond - mat / 0304266 )

Spin photocurrents generated by homogeneous optical excitation with circularly polarized radiation in quantum wells (QWs) are reviewed. The absorption of circularly polarized light results in optical spin orientation due to the transfer of the angular momentum of photons to electrons of a two-dimensional electron gas (2DEG). It is shown that in quantum wells belonging to one of the gyrotropic c...