An Experiment on Impulse Excitation

Upthrow of Objects Due to Horizontal Impulse Excitation By

The phenomenon of upthrow of rigid blocks, excited into motion by horizontal impulses, is examined in this study. A simple foundation model is used, consisting of two sets of springs and dashpots; one set near each corner of the block. Each set consists of vertical and horizontal elements. The vertical springs are not permitted to take tensile forces, so separation of the block from the ground ...

Thermodynamic theory of saturation of the impulse magnon excitation

An Impulse Sequence Representation of the Excitation Source Characteristics of Nonverbal Speech Sounds

Impulse-sequence representation of the excitation source component of normal speech signal has been of considerable interest in speech coding research. If a similar representation can be made for nonverbal (i.e., nonnormal or nonneutral) speech sounds, that would immensely help in their acoustic analyses and diverse applications. This paper proposes a representation of the excitation source cha...

An Introduction to Natural Experiment Studies

در دو سخن سردبیری شماره‌های قبل به مطالعات مداخله‌ای (Interventional and/or experimental studies) [1] و مطالعات نیمه تجربی (studies Quasi-experiment) [2] پرداختیم. همان جا، به این نکته اشاره کردیم که برای اندازه‌گیری کارآیی یک دارو، واکسن، برنامه بهداشت عمومی و متغیرهای دیگری از این دست، مطالعات مداخله‌ای بهترین گزینه هستند. تقسیم تصادفی و کورسازی از مؤلفه‌های اساسی یک مطالعه مداخله‌ای است [1]....

Excitation of Alfvén impulse by the anomalous resistance onset on the auroral field lines

The onset of anomalous resistance in a layer on auroral field lines is shown to be accompanied by the excitation of an Alfvénic impulse (AI). The generated AI marks the transition of the global magnetosphere-ionosphere instability into an explosive phase with positive feedback. The spatial structure of this impulse both in space and on the ground has been described analytically and numerically ...