Mathematical methods for spatially cohesive reserve design

The problem of designing spatially cohesive nature reserve systems that meet biodiversity objectives is formulated as a nonlinear integer programming problem. The multiobjective function minimises a combination of boundary length, area and failed representation of the biological attributes we are trying to conserve. The task is to reserve a subset of sites that best meet this objective. We use data on the distribution of habitats in the Northern Territory, Australia, to show how simulated annealing and a greedy heuristic algorithm can be used to generate good solutions to such large reserve design problems, and to compare the effectiveness of these methods.

Aspectos anatomopatológicos do parasitismo por nematódeos da superfamília Filarioidea em capivaras (Hydrochoerus hydrochaeris) de vida livre no Centro-Oeste brasileiro

São descritos dois casos de parasitismo por Cruorifilaria tuberocauda em capivaras de vida livre no Distrito Federal, Brasil. Macroscopicamente, observou-se nas superfícies de corte dos rins espessamento acentuado de vasos das regiões cortical e córtico-medular. Microscopicamente, havia arterite proliferativa e granulomatosa acentuada associada a filarídeos intralesionais consistentes com Cruorifilaria tuberocauda. Esse é o primeiro relato do parasitismo por esse filarídeo em capivaras no Distrito Federal

La Piti i la llana. 'Piti y la lana'.

Mediante una marioneta llamada Piti, el pastor explica el proceso de esquilado de las ovejas. Explica la técnica para esquilarlas, los distintos tipos de lana y los procesos de la carda y de hilar el hilo con el fuste. También le enseña cómo se confeccionan unos calcetines.

DESENVOLVIMENTO E AVALIAÇÃO DE ELETRODOS DE DIFUSÃO GASOSA (EDG) PARA GERAÇÃO DE H2O2 IN SITU E SUA APLICAÇÃO NA DEGRADAÇÃO DO CORANTE REATIVO AZUL 19

DEVELOPMENT AND EVALUATION OF GAS DIFFUSION ELECTRODES (GDE) FOR GENERATION OF H2O2 IN SITU AND THEIR APPLICATION IN THE DEGRADATION OF REACTIVE BLUE 19 DYE. This work reports the development of GDE for electrogeneration of H2O2 and their application in the degradation process of Reactive Blue 19 dye. GDE produced by carbon black with 20% polytetrafluoroethylene generated up to 500 mg L-1 of H2O2 through the electrolysis of acidic medium at -0.8 V vs Ag/AgCl. Reactive Blue 19 dye was degraded most efficiently with H2O2 electrogenerated in the presence of Fe(II) ions, leading to removal of 95% of the original color and 39% of TOC at -0.8 V vs Ag/AgCl.

Efficiency, costs and trade-offs in marine reserve system design

With marine biodiversity conservation the primary goal for reserve planning initiatives, a site's conservation potential is typically evaluated on the basis of the biological and physical features it contains. By comparison, socio-economic information is seldom a formal consideration of the reserve system design problem and generally limited to an assessment of threats, vulnerability or compatibility with surrounding uses. This is perhaps surprising given broad recognition that the success of reserve establishment is highly dependent on widespread stakeholder and community support. Using information on the spatial distribution and intensity of commercial rock lobster catch in South Australia, we demonstrate the capacity of mathematical reserve selection procedures to integrate socio-economic and biophysical information for marine reserve system design. Analyses of trade-offs highlight the opportunities to design representative, efficient and practical marine reserve systems that minimise potential loss to commercial users. We found that the objective of minimising the areal extent of the reserve system was barely compromised by incorporating economic design constraints. With a small increase in area (< 3%) and boundary length (< 10%), the economic impact of marine reserves on the commercial rock lobster fishery was reduced by more than a third. We considered also how a reserve planner might prioritise conservation areas using information on a planning units selection frequency. We found that selection frequencies alone were not a reliable guide for the selection of marine reserve systems, but could be used with approaches such as summed irreplaceability to direct conservation effort for efficient marine reserve design.

Uzasadnienie szczególnej ochrony ubezpieczonych na gruncie III filaru emerytalnego

Reforma systemu emerytalnego polegająca na zmianie systemu zdefiniowanego świadczenia na system zdefiniowanej składki spowodowała zmniejszenie wysokości otrzymywanych świadczeń przez przyszłych emerytów. Działania takie zmusiły zainteresowanych do poszukiwania dodatkowych źródeł utrzymania. Jednym z takich źródeł może być uzupełniający system emerytalny, określany mianem trzeciego filaru emerytalnego. Jego cechą charakterystyczną jest dobrowolność. Dla jego rozwoju niezbędne jest zapewnienie wzmożonego poziomu ochrony ubezpieczonych. Środki te dotyczą zarówno ogólnej polityki konsumenckiej, jak i regulacji cywilnoprawnych oraz administracyjnoprawnych. W praktyce można wyróżnić dwa poziomy ochrony ubezpieczonych w ramach trzeciego filaru. Poziom pierwszy jest właściwy dla wszystkich ubezpieczonych, natomiast drugi poziom zawiera regulacje ograniczone do uzupełniającego systemu emerytalnego.