Small farm extension and research - Asian experiences

Meeting: Agricultural Institute of Canada, Conference, 6-10 July 1986, Saskatoon, Sask., C

Asian aquacultural research challenges for 2000 A.D.

Meeting: Asian Science and Technology Congress 1987, 14-17 Oct. 1987, Kuala Lumpur, M

Issues and methodology : women in farming systems research; discussant paper

Meeting: Farming Systems Research Socio-Economics Monitoring Tour Workshop, 16-28 Sept. 1985, P

Sweet potato, small farmers and need for cooperative research

Meeting: International Sweet Potato Workshop, 20-24 May 1987, BayBay, P

Food legumes - IDRC supported projects

Article prepared for ACIAR Food Legumes Newslette

Sustainable agricultural systems : issues for farming systems research

Meeting: International Workshop on Developments in Procedures for Farming Systems Research / OFR, 13-17 Mar. 1989, Bogor, I

Sustainable agricultural systems : issues for farming systems

Meeting: Asian Rice Farming Systems Network Working Group, Meeting, 11-15 Nov. 1988, Baguio, P

A Variational Level Set Approach for Surface Area Minimization of Triply Periodic Surfaces

In this paper, we study triply periodic surfaces with minimal surface area under a constraint in the volume fraction of the regions (phases) that the surface separates. Using a variational level set method formulation, we present a theoretical characterization of and a numerical algorithm for computing these surfaces. We use our theoretical and computational formulation to study the optimality of the Schwartz P, Schwartz D, and Schoen G surfaces when the volume fractions of the two phases are equal and explore the properties of optimal structures when the volume fractions of the two phases not equal. Due to the computational cost of the fully, three-dimensional shape optimization problem, we implement our numerical simulations using a parallel level set method software package.Comment: 28 pages, 16 figures, 3 table

Measurement of the CP-Violating Asymmetry Amplitude sin2β\beta

We present results on time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88 million Y(4S) --> B Bbar decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We study events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0bar from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2beta, is derived from the decay-time distributions in such events. We measure sin2beta = 0.741 +/- 0.067 (stat) +/- 0.033 (syst) and |lambda| = 0.948 +/- 0.051 (stat) +/- 0.017 (syst). The magnitude of lambda is consistent with unity, in agreement with the Standard Model expectation of no direct CP violation in these modes