46,436 research outputs found
Women-led Fisheries Management: A Case Study From Bangladesh
This is a case study of a women-led fishery in Bangladesh. Although women constitute 50% of the total population of Asia (Southern)-Bangladesh; only 18% are economically involved inthe total labor force. They are involved in diversified work within their homesteads. However, during times offamily needs and economic crisis, women are involved in non-traditional jobs. In the fisheries sector, Muslimwomen are traditionally not involved in fishing but they are involved in fish drying and salting. In the Hindudominated areas such as Goakhola-Hatiara, women are involved in fish catch as well as the collection of otheraquatic resources as one of their livelihood strategies. Women and subsistence fishers are taking the lead inmanaging a common capture fishery resource in Goakhola-Hatiara with the support from an NGO for perhapsthe first time in Bangladesh. However, the role of women in the Beel Management Committee is not well defined.Under the leadership of women the socio-economic conditions have changed and the social capital has increased
Modular multilevel converter with modified half-bridge submodule and arm filter for dc transmission systems with DC fault blocking capability
Although a modular multilevel converter (MMC) is universally accepted as a suitable converter topology for the high voltage dc transmission systems, its dc fault ride performance requires substantial improvement in order to be used in critical infrastructures such as transnational multi-terminal dc (MTDC) networks. Therefore, this paper proposes a modified submodule circuit for modular multilevel converter that offers an improved dc fault ride through performance with reduced semiconductor losses and enhanced control flexibility compared to that achievable with full-bridge submodules. The use of the proposed submodules allows MMC to retain its modularity; with semiconductor loss similar to that of the mixed submodules MMC, but higher than that of the half-bridge submodules. Besides dc fault blocking, the proposed submodule offers the possibility of controlling ac current in-feed during pole-to-pole dc short circuit fault, and this makes such submodule increasingly attractive and useful for continued operation of MTDC networks during dc faults. The aforesaid attributes are validated using simulations performed in MATLAB/SIMULINK, and substantiated experimentally using the proposed submodule topology on a 4-level small-scale MMC prototype
Noncommutative Geometry: Fuzzy Spaces, the Groenewold-Moyal Plane
In this talk, we review the basics concepts of fuzzy physics and quantum
field theory on the Groenwald-Moyal Plane as examples of noncommutative spaces
in physics. We introduce the basic ideas, and discuss some important results in
these fields. In the end we outline some recent developments in the field.Comment: This is a contribution to the Proc. of the O'Raifeartaigh Symposium
on Non-Perturbative and Symmetry Methods in Field Theory (June 2006,
Budapest, Hungary), published in SIGMA (Symmetry, Integrability and Geometry:
Methods and Applications) at http://www.emis.de/journals/SIGMA
Understanding livelihoods dependent on inland fisheries in Bangladesh and Southeast Asia: final technical report
Inland fisheries, Wetlands, Livelihoods
Common property in the Mekong: Issues of sustainability and subsistence
This volume contains the paper presented in a panel session on Conflicts, competition and Cooperation in the Mekong Commons: Feeding People and Protecting Natural Resources, during the Seventh Conference of the International Association for the Study of Common Property entitled Crossing Boundaries held on 10-14 June 1998 at the University of British Columbia, Vancouver, Canada. It provides an analysis of the common property perspective of the basinÆs natural resources and raises the issues of subsistence and sustainability stemming from development interventions.Common property resources, Fishery resources, Mekong River,
Low Momentum Classical Mechanics with Effective Quantum Potentials
A recently introduced effective quantum potential theory is studied in a low
momentum region of phase space. This low momentum approximation is used to show
that the new effective quantum potential induces a space-dependent mass and a
smoothed potential both of them constructed from the classical potential. The
exact solution of the approximated theory in one spatial dimension is found.
The concept of effective transmission and reflection coefficients for effective
quantum potentials is proposed and discussed in comparison with an analogous
quantum statistical mixture problem. The results are applied to the case of a
square barrier.Comment: 4 figure
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