Train passage

In order to know accelerations due to the train passage, accelerometers were placed in the gravity (vertical or axial) direction on the concrete pier. The frequency response of the accelerometer (750WI, TEAC) was from 3... 

Hz to 10 kHz. The acceleration signals were recorded in a signal recorder (GX-1, TEAC) with 500 Hz sampling frequency. In Fig. 14.12, a typical waveform of the acceleration and its frequency spectrum via FFT are shown. It is found that principal frequency components are distributed from 50 to 100 Hz. Since the lower-band frequency of AE system employed was 10 kHz, it was concluded that the frequency components of the acceleration due to the train passage are even lower than the frequency range of the AE system. 

D locations of AE sources were obtained under train passage. This is because source characteristics of the secondary AE activity is investigated in relation with existing cracks. In a brick stmcture, high noises due to fretting between brick surfaces were expected. Thus, filtering was taken into account. Results of AE locations are shown in Fig. 14.26. 

The ground bed, for example, of the Russian railway roads used in very tough operating and natural conditions, its defects and deformations present a real threat to the safe trains running and reduce the passage capacity of the railway lines. 

Commercial hydrogen chloride from a cylinder is dried by passage through a train consisting of a wash bottle of concentrated sulfuric acid, a 25-cm. calcium chloride tube, and finally an empty safety trap. 

Finally, in this Introduction, it is worthwhile to reproduce one of the several current definitions, in the Oxford English Dictionary, of the word simulate To imitate the conditions or behaviour of (a situation or process) by means of a model, especially for the purpose of study or training specifically, to produce a computer model of (a process) . The Dictionary quotes this early (1958) passage from a text on high-speed data processing A computer can simulate a warehouse, a factory, an oil refinery, or a river system, and if due regard is paid to detail the imitation can be very exact . Clearly, in 1958 the scientific uses of computer simulation were not yet thought worthy of mention, or perhaps the authors did not know about them. 

The following passage offers the author s perspective on the need for healthcare providers with specialized training to care for a rapidly expanding population of older Americans. 

According to the passage, which of the following is NOT a possible benefit of geriatric training for healthcare providers ... 

---