Environmental impact assessment of the pangasius sector in the Mekong Delta

In the past seven years the export of white pangasius fillets grew fast. The culture method shifted to intensive production of striped catfish (Ca Tra) in deep ponds because this is more efficient than the pen and cage culture of Ca Basa. Today, striped catfish comprises more than 90 % of the culture. The increased production was achieved by producers investing in large ponds. The market chain is gearing towards vertical integration. Most farms keep fish at relatively high densities of 15 to 25 fish/m3 in ponds having a depth of up to 4m, and are advised to exchange daily 20 to 40% of the water. The sustainability of the sector is threatened due to the increased environmental pressure, and hampered by the growing cost of inputs and reduced farm-gate prices of the fish. The Environmental Impact Assessment (EIA) intends to identify measures for preventing or mitigating the environmental impacts of catfish culture in the Mekong Delta. The EIA was a seven-step process during which we interacted twice with part of the main stakeholders. To build trust among the stakeholders from the sector, we conducted the scoping and goal setting with them

FAMEBASE VER. 2.0 – Hệ quản trị cơ sở dữ liệu cho người sử dụng đầu cuối

FAMEBASE VER. 2.0 – Hệ quản trị cơ sở dữ liệu cho người sử dụng đầu cuối

Solar device and method of generating electric power

The present invention relates to a solar device comprising a conglomerate of asymmetric electrically-conducting nanoparticles in combination with a filter for circularly polarizing incident light to excite the nanoparticles, wherein the asymmetric nanoparticles are aligned so as to cause that said nanoparticles generally occupy a same predefined orientation within the conglomerate.Imaging Science and TechnologyApplied Science

Collapse of optical vortices

Quantum Matter and Optic

HIV knowledge and risk behaviors among drug users in three Vietnamese mountainous provinces

10.1186/s13011-019-0191-8Substance Abuse: Treatment, Prevention, and Policy141

Methadone maintenance treatment reduces the vulnerability of drug users on hiv/aids in vietnamese remote settings: Assessing the changes in hiv knowledge, perceived risk, and testing uptake after a 12-month follow-up

10.3390/ijerph15112567International Journal of Environmental Research and Public Health1511256

Microcavity effects on the generation, fluorescence, and diffusion of excitons in organic solar cells

We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but varies with its position within the device, even with moderate fluorescence quantum efficiency. With large quantum efficiencies, the rate of fluorescence can be strongly reduced with proper choices of the geometrical and dielectric parameters. Hence, through proper micro-cavity design, the diffusion length can be increased and the device performance significantly improved without recourse to triplet excitonic states. © 2013 Optical Society of America.SCOPUS: ar.jSCOPUS: ar.jinfo:eu-repo/semantics/publishe