58 research outputs found
Integrative framework and methods for coastal area management: proceedings
Coastal zone management, ASEAN,
Waste management in the coastal areas of the ASEAN region: roles of governments, banking institutions, donor agencies, private sector and communities
Waste disposal, Marine pollution, Pollution control, Coastal zone management, Environment management, ASEAN,
Managing ASEAN's coastal resources for sustainable development: roles of policymakers, scientists, donors, media and communities
Coastal zone management, Sustainable development, ASEAN,
The coastal environmental profile of Brunei Darussalam: resource assessment and management issues
Coastal zone management, Resource development, Coastal zone, Environmental profile, Brunei Darussalam,
Towards sustainable development of the coastal resources of Lingayen Gulf, Phlilppines
Coastal zone management, Resource development, Philippines, Lingayen Gulf,
Coastal area management education in the ASEAN region: proceedings of the Workshop on Coastal Area Management Education in the ASEAN region, Singapore, 8-11 October 1990
Coastal zone management, Education, Curricula, Training, ASEAN,
Coastal area management in Southeast Asia: policies, management strategies and case studies
Coastal zone management, Southeast Asia,
The coastal resources of Brunei Darussalam: status, utilization and management
Marine resources, Resource management, Coastal zone management, Brunei Darussalam,
Quantum, cyclic and particle-exchange heat engines
Differences between the thermodynamic behavior of the three-level amplifier
(a quantum heat engine based on a thermally pumped laser) and the classical
Carnot cycle are usually attributed to the essentially quantum or discrete
nature of the former. Here we provide examples of a number of classical and
semiclassical heat engines, such as thermionic, thermoelectric and photovoltaic
devices, which all utilize the same thermodynamic mechanism for achieving
reversibility as the three-level amplifier, namely isentropic (but
non-isothermal) particle transfer between hot and cold reservoirs. This
mechanism is distinct from the isothermal heat transfer required to achieve
reversibility in cyclic engines such as the Carnot, Otto or Brayton cycles. We
point out that some of the qualitative differences previously uncovered between
the three-level amplifier and the Carnot cycle may be attributed to the fact
that they are not the same 'type' of heat engine, rather than to the quantum
nature of the three-level amplifier per se.Comment: 9 pages. Proceedings of 'Frontiers of Quantum and Mesoscopic
Thermodynamics', Prague 200
Final State Rescattering and Color-suppressed \bar B^0-> D^{(*)0} h^0 Decays
The color-suppressed \bar B^0-> D^{(*)0}\pi^0, D^{(*)0}\eta, D^0\omega decay
modes have just been observed for the first time. The rates are all larger than
expected, hinting at the presence of final state interactions. Considering \bar
B^0-> D^{(*)0}\pi^0 mode alone, an elastic D^{(*)}\pi -> D^{(*)}\pi
rescattering phase difference \delta \equiv \delta_{1/2} - \delta_{3/2} \sim
30^\circ would suffice, but the \bar B^0-> D^{(*)0}\eta, D^0\omega modes compel
one to extend the elastic formalism to SU(3) symmetry. We find that a universal
a_2/a_1=0.25 and two strong phase differences 20^\circ \sim \theta < \delta <
\delta^\prime \sim 50^\circ can describe both DP and D^*P modes rather well;
the large phase of order 50^\circ is needed to account for the strength of {\it
both} the D^{(*)0}\pi^0 and D^{(*)0}\eta modes. For DV modes, the nonet
symmetry reduces the number of physical phases to just one, giving better
predictive power. Two solutions are found. We predict the rates of the \bar
B^0-> D^{+}_s K^-, D^{*+}_s K^-, D^0\rho^0, D^+_s K^{*-} and D^0\phi modes, as
well as \bar B^0-> D^{0}\bar K^0, D^{*0}\bar K^0, D^{0}\bar K^{*0} modes. The
formalism may have implications for rates and CP asymmetries of charmless
modes.Comment: REVTeX4, 18 pages, 5 figures, to appear in Phys. Rev.
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