In the last few decades, the telecommunications industry has experienced dramatic technological change. However, since divestiture of AT&T, there have been only a few studies that estimate the effects of technological change. Using a cost function, we estimate these effects. Unlike previous...

The authors present a theoretical derivation of cigarette demand and estimate the demand in Japan with prefecturE-level data. By examining the impact of information dissemination regarding the health hazards of smoking, the authors argue that information dissemination is an effective instrument...

In this paper, precise fault location in electrical traction network systems is discussed in the high-frequency domain. Based on the analysis of the equivalent impedance at the measurement terminal, the relationship between the fault distance and the frequency spectrum extreme points of the...

In this paper, methods of fault location are discussed in electrical traction single-end direct power supply network systems. Based on the distributed parameter model of the system, the position of the short-circuit fault can be located with the aid of the current and voltage value at the...

Aiming at developing exhaust gas-driven automobile air conditioners, two types of systems varying in heat carriers were preliminarily designed. A new hydride pair LaNi4.61Mn0.26Al0.13/La0.6Y0.4Ni4.8Mn0.2 was developed working at 120–200°C/20–50°C/−10–0°C. P-C isotherms and reaction...