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A Van de Graaff Generator Repelling a Charge

REA Catalogado

An animation of the motion of a positively charged particle repelled by the positively charged sphere of a van de Graaff generator. When the charge is moving toward the sphere and slowing down, its kinetic energy is decreasing and the energy is being stored in the local electric field as that field is compressed. When the charge is moving away from the sphere and speeding up, its kinetic energy is increasing as the energy previously stored in the compressed field is released.

Tema: general: 

• Ciencias›Física

Electrostatic Repulsion in Van de Graaff Bubbles Tutorial

RE Sugerido

This tutorial explains how Van de Graaff generators illustrate electrostatic forces.

Tema: general: 

• Ciencias

How Van de Graaff Generators Work

REA Catalogado

Article describing "How Van de Graaff Generators Work". It also gives directions to build one generator using common materials.

Tema: general: 

• Ciencias›Física

The Van de Graaff Generator Tutorial

RE Sugerido

This tutorial illustrates how a Van de Graaff electrostatic generator operates and how such a spark is produced.

Tema: general: 

• Ciencias

An improved ion source extraction system of a 3 mv Van de Graaff accelerator

REA Auditado

The proton beam current available from our KN 3000 Van de Graaff accelerator has been more than doubled by the installation of a newly designed focussing electrode.

Tema: general: 

• Ciencias Sociales›Educación

A Van de Graff Generator Repelling a Charge

RE Sugerido

An animation of the electric fields around a van de Graaff generator as it repels a positive charge. We show both the "moving field lines" and the"dynamic line integral convolution" representation of the electric field. Correlations in the animated texture indicate the direction of the field. Set Windows Media Player to "repeat".

Tema: general: 

• Ingeniería y Ciencias Aplicadas

Applications of next generation sequencing in (epi)genetics

REA Auditado

Technological developments in DNA sequencing are an excellent example of how major advances in scientific techniques can lead to numerous conceptual discoveries in the life sciences. Starting in the 1970s with the development of DNA sequencing by chain termination methods, through the introduction of fluorescently labeled terminators and progress in sequencing automation in the late 1980s and 1990s, to the introduction of next-generation sequencers in the mid 2000s, these new approaches consistently opened novel and often unexpected horizons for life scientists.

Tema: general: 

• General

Content in context: De verrijking van cultureel erfgoed op locatie door user generated context.

REA Auditado

Tema: general: 

• General

Dynamic Entrepreneurship : First and Second-Generation Immigrant Entrepreneurs in Dutch Cities

REA Auditado

The nature of immigrant entrepreneurship is changing in Dutch society. Nowadays, many immigrant entrepreneurs start businesses in producer and personal services instead of more traditional sectors such as retail or hotel and catering. At the same time, a growing number of second-generation immigrants are setting up their own firms in the Netherlands. These second-generation immigrants-born and/or raised in the receiving country-are following different trajectories in comparison with first-generation immigrant entrepreneurs, indeed displaying a move away from traditional immigrant niches.

Tema: general: 

• Historia y Arqueología›Historia (General)›Obras Generales

The charge transport in an electrostatic belt generator

REA Auditado

The fluctuations in the charge transport system of an EN Tandem Van de Graaff accelerator have been investigated by means of a frequency spectrum analyser. Frequency spectra of the terminal ripple, the short-circuit current and the voltage at the belt charge screen have been measured. Also the correlation function is examined between the last two signals. The mechanisms which can cause the measured fluctuations are discussed. The influence of fluctuations in the belt velocity and of vibrations is apparent.

Tema: general: 

• Ciencias Sociales›Educación