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There are three classes of components for oxide glasses: network formers, intermediates, and modifiers. The network formers (silicon, boron, germanium) form a highly cross-linked network of chemical bonds. The intermediates (titanium, aluminium, zirconium, beryllium, magnesium, zinc) can act as both network formers and modifiers, according to the glass composition. The modifiers (calcium, lead, lithium, sodium, potassium) alter the network structure; they are usually present as ions, compensated by nearby non-bridging oxygen atoms, bound by one covalent bond to the glass network and holding one negative charge to compensate for the positive ion nearby. Some elements can play multiple roles; e.g. lead can act both as a network former (Pb4+ replacing Si4+), or as a modifier.

What type of components change the network's shape?
Answer: modifiers
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Beyonce embarked on The Mrs. Carter Show World Tour on April 15 in Belgrade, Serbia; the tour included 132 dates that ran through to March 2014. It became the most successful tour of her career and one of the most-successful tours of all time. In May, Beyonce's cover of Amy Winehouse's "Back to Black" with Andre 3000 on The Great Gatsby soundtrack was released. She was also honorary chair of the 2013 Met Gala. Beyonce voiced Queen Tara in the 3D CGI animated film, Epic, released by 20th Century Fox on May 24, and recorded an original song for the film, "Rise Up", co-written with Sia.

What part did she voice for the movie Epic?
Answer: Queen Tara
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Current circulating in one antenna generally induces a voltage across the feedpoint of nearby antennas or antenna elements. The mathematics presented below are useful in analyzing the electrical behaviour of antenna arrays, where the properties of the individual array elements (such as half wave dipoles) are already known. If those elements were widely separated and driven in a certain amplitude and phase, then each would act independently as that element is known to. However, because of the mutual interaction between their electric and magnetic fields due to proximity, the currents in each element are not simply a function of the applied voltage (according to its driving point impedance), but depend on the currents in the other nearby elements. Note that this now is a near field phenomenon which could not be properly accounted for using the Friis transmission equation for instance.

What cause mutual interactions between the elements electric and magnetic fields?
Answer:
proximity