Sources of high frequency gravitational waves are reviewed. Gravitational collapse, rotational instabilities and oscillations of the remnant compact objects are potentially important sources of gravitational waves. Significant and unique information for the various stages of the collapse, the evolution of protoneutron stars and the details of the equations of state of such objects can be drawn ...

The rolls, from which conscripts were called for working on the pyramids, may have been among the first administrative data sources for preparing statistics. Later rulers enrolled males for recruiting members to their legions. The enrolment data were probably also frequently used for statistics to assess military power. Since National Statistical Institutes were founded, many kinds of administr...

geophysical data are always affected by different sources of anomaly. these sources are classified in to three groups: first group is relatively deep sources commonly called as regional effects, second group is near surface sources or local effects and third group is high frequency noises. the only common way to separate the anomaly is separation with respect to the signal frequency. there are ...