Reusable Recording Medium Based on MBPVA and Vinyl Acetate

A new photopolymerizable recording media is introduced based on poly (vinyl alcohol) and vinyl acetate sensitized with methylene blue. It is observed that this MBPVA/VAc system can be reused a number of times without significant decrease in diffraction efficiency. The PVA-VAc ratio was optimized at 2:1. Diffraction efcienc4y of 6.3% was obtained without any fixing at a dye concentration of 9.3 x 10- mol/l at an exposure of 750mJ/cm2. The material is attractive on account of its reusability.

Reusable Recording Medium based on MBPVA and Vinyl Acetate

A new photopolymerizable recording media is introduced based on poly (vinyl alcohol) and vinyl acetate sensitized with methylene blue. It is observed that this MBPVA/VAc system can be reused a number of times without significant decrease in diffraction efficiency. The PVA-VAc ratio was optimized at 2:1. Diffraction efcienc4y of 6.3% was obtained without any fixing at a dye concentration of 9.3 x 10- mol/l at an exposure of 750mJ/cm2. The material is attractive on account of its reusability.

Studies on Photosensitive polymers for Optical Recording

Department of Polymer Science and Rubber Technology,Cochin University of Science and Technology

Studies on Methylene Blue Sensitized Poly(Vinyl Alcohol): Effect of Molecular Weight of the Polymer and Crosslinking Agents on its Holographic Properties

Dept.of Polymer Science and Rubber Technology,Cochin University of Science and Technology

Preparation and characterisation of "Y-Fe203 as tape recording material

Optimum conditions for the preparation of tape recording quality Y-Fe20 s by the thermal decomposition of ferrous oxalate dihydrate have been established. Formation of the intermediate F%O~ which is most important in forming Y-FezO 3 takes place only in the presence of water vapour. Various stages of decomposition have been characterised by DTA, TG, DTG, and x-ray powder diffraction. The method for the preparation of acicular "Y-Fe208 that matches very well with the commercial tape recording material has been developed

A new inexpensive method for the preparation of acicular precursors for magnetic recording media

Magnetic materials meant for audio/video recording applications necessitate that polycrystalline materials be in acicular shape. So preparation of acicular precursors for magnetic storage materials assumes significance. The employment of aqueous solutions do not produce needle shape crystallites. Glycerol is one of the complexing media used for the precipitation of ferrous oxalate dihydrate. An inexpensive method using starch for preparation of acicular particles is described. The influence of an additive namely Gd on acicularity is also investigated

Sound Recording Skills presentation by Matt Grover

Covers defining a sound in terms of amplitude, frequency, time, timbre and space. How sound behaves within a space. Digital recording settings. Winchester School of Art loan equipment. Winchester School of Art editing software overview.

How to edit a Panopto recording.

This 8-minute video shows you how to edit a recording made using the Panopto lecture capture system. You can access the recording via its Blackboard course, trim the start and end points, remove sections from the middle, and save the edit as a new (separate) version.

How to Make a Panopto Recording Offline

This 7-minute video shows you how to make a recording using Panopto in locations where you have no internet access, such as another institution or on a field trip. It also shows you how to upload the recording when you get back to your office.

How to be brilliant at recording in science.

Contiene hojas de trabajo estructuradas de tal forma, que desarrollan un enfoque sistemático en la investigación de la ciencia en la enseñanza primaria, especialmente, entre alumnos de siete a once años. Cumple con los planes de estudios nacionales de todo el Reino Unido. Estas hojas de trabajo, son fotocopiables y proporcionan treinta y ocho ideas, con objetivos de aprendizaje dirigidos a los niños, es decir, cada uno de ellos se centra en que éstos desarrollen una aptitud específica en cualquier aspecto de la ciencia.

Oxford maths zone. Year 3. Recording book.

Ahorra tiempo al profesor proporcionando un vistazo a los planes de lecciones, y muestra cómo los niños pueden utilizar las matemáticas en el mundo real.