51 research outputs found
Rapport III.12. DEDALE, un système de modélisation pour la gestion des aquifères côtiers
No full textUsseglio Polatera Jean-Marc, Jardin Paul, Molinaro Paolo. Rapport III.12. DEDALE, un système de modélisation pour la gestion des aquifères côtiers. In: Les eaux souterraines et la gestion des eaux. Progrès - qualité - quantité. Vingt et unièmes journées de l'hydraulique. Sophia-Antipolis, 29-31 janvier1991. Tome 3, 1991
Chromatic sunshade cladding unit
No full textThe present invention relates to sunshade units for internal or external cladding of the transparent structures of a building façade comprising a plurality of lamellae (201) each having a substantially flat and elongated conformation along a respective development axis (B), and a structure (220,220') supporting the lamellae configured to support the plurality of lamellae (201) in a condition of parallel and spaced apart lamellae along a direction orthogonal to the development axes (B), the structure (220,220') supporting the lamellae being configured to support the plurality of lamellae (201) in a rotatable manner about a rotation axis parallel to or coincident with its development axis (B), characterized in that each lamella (201) of the plurality of lamellae (201) includes at least one surface portion which comprises at least a reflective layer (10) having at least one reflective surface (11), and a chromatic diffusion layer (20) having a first surface (21) proximal to the reflective surface (11) and a second surface (23), opposite and substantially parallel to the first, configured to be illuminated by incident light, wherein the chromatic diffusion layer (20) comprises a nano-pillar (70) or nano-pore (30) structure in a first material having a first refractive index (n1), immersed in a second material having a second refractive index (n2) other than the first (n1), in which the first and second materials are substantially non-absorbing or transparent to electromagnetic radiations with wavelength comprised in the visible spectrum, wherein the ratio ( nM/nm > between a higher refractive index (nm) and a lower refractive index (nm) chosen between the first (n1) and the second (n2) refractive indexes is comprised between 1.05 and 3, wherein the nano-pillars (71) or nano-pores (31) locally have a development along a main direction not parallel to the first surface (21) and to the second surface (23) of the chromatic diffusion layer, and the nano-pillar (70) or nano-pore (30) structure is characterized by a plurality of geometric parameters comprising a pillar diameter or pore diameter (dP), a pillar length or pore length (lp) along said non-parallel direction, a surface density of nano-pillars or nano-pores (Dp) and a porosity (Pp) of structure (30,70), and wherein the plurality of geometric parameters is configured to provide a higher regular reflectance for wavelengths of the incident light comprised in the range of red with respect to wavelengths of the incident light comprised in the range of blue and a higher diffuse reflectance for wavelengths of the incident light comprised in the range of blue with respect to wavelengths of the incident light comprised in the range of red
Effects of habitat on the recruitment variation of coral reef fishes.
No full textCoral reef fish life cycles have two distinct phases that take place in different parts of their environment. Benthonic or pelagic eggs spawned by adults hatch into larvae that join the water column, after spending some variable time in it they settle back on to a reef. It is well documented that recruitment is highly variable across space and time. This variation can be a reflection of factor occurring during the pelagic larval phase, or during the settlement event. Prior to settlement the number of larvae settling to a given location could be a consequence of oceanographic features, as well as random events taking place during the pelagic larval phase which might affect the survival of larvae. Larvae then have been found to settle differentially to a preferred habitat. These associations have been studied at several spatial scales with contrasting results. In order to explore relationships between habitat and patterns of recruitment, we must first describe the habitat features found at a given location. Chapter two explored the effects that sampling intensity (i.e. number of sampling points or quadrats) and method (point-intercept vs. photo quadrats) have on the comprehensiveness and precision of percent cover estimates of substratum abundances. Chapter three assessed the degree to which habitat type can explain the spatial and temporal variation observed in the recruitment of 2 coral reef species. (Abstract shortened by UMI.)Dept. of Biological Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2004 .U87. Source: Masters Abstracts International, Volume: 43-01, page: 0150. Adviser: Peter F. Sale. Thesis (M.Sc.)--University of Windsor (Canada), 2004
The Galapagos Grouper Fishery: Mostly Dead, Stunned, or In Need of Management Regulations?
No full textThe Galapagos sailfin grouper Mycteroperca olfax, locally known as bacalao, is an important ecological, cultural, and economical resource in the Galapagos Archipelago. However, years of intensive fishing pressure have resulted clear signs of overfishing. Bacalao represent an important resource for which there is no management, but for which management cannot be implemented because of a lack of information on the current status of the fishery and inconsistencies in life history information. My research was, therefore, aimed at assessing life history and fisheries attributes for bacalao with the goal of providing management options for this species. Longevity of bacalao is greater than previously reported, with a maximum recorded age of 21 years. Growth estimates showed bacalao to grow larger and slower than previously thought. Size at maturity was also estimated to be larger than previously accepted assessments. Current status of the bacalao fishery is worrisome as it is undergoing both recruitment and growth overfishing. The percentage of fish above size at maturity in the catch has dropped to an all time low, and Spawning Potential Ratio suggests that bacalao is facing imminent reproductive failure. Furthermore, over a 20-‐‑year period there have been declines in all of the stock health indicators, with 2012 being the lowest year on record. In lieu of management regulations specifically aimed at bacalao, the Galapagos Marine Reserve relies on no-‐‑take zones to provide protection from fishing. However, size of bacalao, catch rates, and catch composition were indistinguishable between areas open and closed to fishing. Bacalao showed high site fidelity and likely do not move outside no-‐‑take zones, and therefore poaching within these zones may contribute to the patterns observed. An evaluation of the knowledge of fishers of the current GMR zonation suggests that this lack of compliance due to unwitting poaching. My research has provided valuable information upon which management regulations for bacalao can be built, these should include slot limits, temporal closures, and adequate enforcement of no fishing areas.Ph.D
The North-South Divide: Regional Economic Inequality in Contemporary Italy
No full textThis paper analyzes data from the International Social Survey Program’s 2009 Social Inequality Survey in order to explain the contemporary economic inequality between the macro-regions of Italy. Economic inequality will be measured by household income. I use multiple regression analysis to first determine the degree of the regional disparity and then to determine what factors explain that inequality. My overall findings from this analysis are that while all of these variables contribute to household income inequality, it is difficult to pinpoint a consistent factor affecting household income inequality across all of the regions.Some images have been omitted in this online version. The full version is available only in the Honors College office.Sociolog
Zwitterion-Coated Iron Oxide Nanoparticles: Surface Chemistry and Intracellular Uptake by Hepatocarcinoma (HepG2) Cells
No full textNanoparticles
(NPs) have received much attention in recent years
for their diverse potential biomedical applications. However, the
synthesis of NPs with desired biodistribution and pharmacokinetics
is still a major challenge, with NP size and surface chemistry being
the main factors determining the behavior of NPs in vivo. Here we
report on the surface chemistry and in vitro cellular uptake of magnetic
iron oxide NPs coated with zwitterionic dopamine sulfonate (ZDS).
ZDS-coated NPs were compared to similar iron oxide NPs coated with
PEG-like 2-[2-(2-methoxyethoxy)ethoxy]acetic acid (MEEA) to investigate
how surface chemistry affects their in vitro behavior. ZDS-coated
NPs had a very dense coating, guaranteeing high colloidal stability
in several aqueous media and negligible interaction with proteins.
Treatment of HepG2 cells with increasing doses (2.5–100 μg
Fe/mL) of ZDS-coated iron oxide NPs had no effect on cell viability
and resulted in a low, dose-dependent NP uptake, inferior than most
reported data for the internalization of iron oxide NPs by HepG2 cells.
MEEA-coated NPs were scarcely stable and formed micrometer-sized aggregates
in aqueous media. They decreased cell viability for dose ≥50
μg Fe/mL, and were more efficiently internalized than ZDS-coated
NPs. In conclusion, our data indicate that the ZDS layer prevented
both aggregation and sedimentation of iron oxide NPs and formed a
biocompatible coating that did not display any biocorona effect. The
very low cellular uptake of ZDS-coated iron NPs can be useful to achieve
highly selective targeting upon specific functionalization
Collaborative Approach to Fisheries Management as a Way to Increase the Effectiveness of Future Regulations in the Galapagos Archipelago
No full textVariation in fish density, assemblage composition and relative rates of predation among mangrove, seagrass and coral reef habitats
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