The Paris agreement target of limiting global surface warming to 15-2°C compared to pre-industrial levels by 2100 will heavily impact the ocean While ambitious mitigation and adaptation are both needed, the ocean provides major opportunities for action to reduce climate change globally and its impacts on vital ecosystems and ecosystem services A comprehensive and systematic assessment of 13 global- and local-scale, ocean-based measures was performed to help steer the development and implementation of technologies and actions towards a sustainable outcome We show that (1) all measures have tradeoffs and multiple criteria must be used for a comprehensive assessment of their potential, (2) greatest benefit is derived by combining global and local solutions, some of which could be implemented or scaled-up immediately, (3) some measures are too uncertain to be recommended yet, (4) political consistency must be achieved through effective cross-scale governance mechanisms, (5) scientific effort must focus on effectiveness, co-benefits, disbenefits, and costs of poorly tested as well as new and emerging measures

/pdf/ocean-solutions-to-address-climate-change-and-its-effects-on-oyjqg1huxh.pdf

Ocean solutions to address climate change and its effects on marine ecosystems

Photopolymers are very interesting as optically sensitive recording media due to the fact that they are inexpensive, self-processing materials with the ability to capture low-loss, high-fidelity volume recordings of 3D illuminating patterns. We have prepared this paper in part in order to enable the recognition of outstanding issues, which limit in particular the data storage capacity in holographic data storage media. In an attempt to further develop the data storage capacity and quality of the information stored, that is, the material sensitivity and resolution, a deeper understanding of such materials in order to improve them has become ever more crucial. In this paper a brief review of the optimisation of photopolymer materials for holographic data storage (HDS) applications is described. The key contributions of each work examined and many of the suggestions made for the improvement of the different photopolymer material discussed are presented.

/pdf/a-review-of-the-optimisation-of-photopolymer-materials-for-4848ud7dla.pdf

A Review of the Optimisation of Photopolymer Materials for Holographic Data Storage

Encyclopedia of Coastal Science

Photopolymer materials have received a great deal of attention because they are inexpensive, self-processing materials that are extremely versatile, offering many advantages over more traditional materials. To achieve their full potential, there is significant value in understanding the photophysical and photochemical processes taking place within such materials. This paper includes a brief review of recent attempts to more fully understand what is needed to optimize the performance of photopolymer materials for Holographic Data Storage (HDS) and Self-Written Waveguides (SWWs) applications. Specifically, we aim to discuss the evolution of our understanding of what takes place inside these materials and what happens during photopolymerization process, with the objective of further improving the performance of such materials. Starting with a review of the photosensitizer absorptivity, a dye model combining the associated electromagnetics and photochemical kinetics is presented. Thereafter, the optimization of photopolymer materials for HDS and SWWs applications is reviewed. It is clear that many promising materials are being developed for the next generation optical applications media.

A Review of Hologram Storage and Self-Written Waveguides Formation in Photopolymer Media.

The invention provides a photosensitive resin composition that includes titanium black, a photopolymerizable compound, a resin A having an acid value of from 70 mgKOH/g to 250 mgKOH/g, a resin B having an acid value of from 26 mgKOH/g to 65 mgKOH/g, a photopolymerization initiator, and a solvent, the photopolymerization initiator including an oxime photopolymerization compound.

Photosensitive resin composition, light-shielding color filter, method of producing the same and solid-state image sensor

We report the observation of a self-written waveguide inside a bulk methylene blue sensitized poly/vinyl alcohol)/acrylamide photopolymer material. Light from a low power He-Ne laser is focused into the material, and the evolution of the beam is monitored. The refractive index of the material is modulated in the region of high intensity due to photobleaching and photopolymerization effects occurring in the material. As a result, the beam propagates through the medium without any diffraction effects.

Self-written waveguide in methylene blue sensitized poly(vinyl alcohol)/acrylamide photopolymer material.

Natural processes like wave action, tides, winds, storm surges, and tsunamis constantly shape the shoreline by inducing erosion and accretion Coastlines with intact vegetated dunes, mangroves, and

https://journals.sagepub.com/doi/pdf/10.1177/1759313115623163

Effect of artificial seagrass on wave attenuation and wave run-up

Effect of Artificial Sea Grass on Wave Attenuation- An Experimental Investigation☆

Copper doped methylene blue sensitized poly(vinyl alcohol) (MBPVA)–acrylamide films were fabricated to improve the storage life of recorded gratings. The films were fabricated using gravity settling method and the copper chloride concentration was optimized as 3.18×10-3 mol/l for a dye concentration of 6.2×10-4 mol/l. The gratings recorded on the optimized film constitution could be stored for months with stable diffraction efficiency (24%) without any chemical or thermal fixing techniques. The resolution of the material is found to be unaffected with the addition of copper chloride.

https://dyuthi.cusat.ac.in/xmlui/bitstream/handle/purl/713/Cu%20doped.pdf?sequence=1

Beena Mary John

Papers

Self-written waveguide in methylene blue sensitized poly(vinyl alcohol)/acrylamide photopolymer material.

Effect of artificial seagrass on wave attenuation and wave run-up

Effect of Artificial Sea Grass on Wave Attenuation- An Experimental Investigation☆

Copper Doped Methylene Blue Sensitized Poly(vinyl alcohol)–Acrylamide Films for Stable Diffraction Efficiency

Effect of Artificial Vegetation on Wave Attenuation – An Experimental Investigation