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This expository article gives a straight‐forward derivation of the classical representation formulas of the three‐dimensional rotation group in explicit (non‐symbolical) form starting with the most elementary representation of a rotation by a linear homogeneous transformation with a proper...
The nature of the thermal expansion anomaly in high polymers, known as the second‐order transition, is examined in some detail. It is suggested that below the transition temperature, Tm , polymer chains can expand sidewards but not parallel to their length. At Tm lengthwise expansion becomes...
The theory of the frequency conversion diagram has previously been presented in this journal. The research work is now extended to include triode tubes, and it is shown in the following that the conversion diagram provides a suitable method of treatment of non‐linear mixers with more than two...
The electrical properties of semi‐conductors are briefly reviewed. The information concerning the structure of these materials which is obtained by electrical measurements is discussed. The most important of the physical‐chemical methods available for the investigation of deviations from...
A review is given of typical deviations from ordinary valence rules by alloys and inorganic compounds. The effect on the electrical properties of a compound of a deviation from stoichiometric proportions is discussed. The value of the information obtained from electrical measurements is...
A new and relatively simple method of measuring the resistance of wires at frequencies between about 200 kilocycles and about 40 megacycles is described. By this method, the test specimen is strung down the center of a metal pipe about ten to a hundred feet in length, depending upon the test...
The plan and construction of a device capable of accelerating electrons to energies as high as 100 million electron volts are described together with the special building to house it. A more detailed description of the device and its construction will appear in the General Electric Review . The...
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