Criteria for the design of an acoustic pulse reflectometer specifically intended for musical instrument research are discussed. Different types of pulse source are considered, and various approaches to the signal processing of the reflected pulse are evaluated., Finally, the practical utility of the technique for instrument designers and manufacturers is discussed.

In recent years a clear trend has developed in the aerospace industry towards the procurement of integrated systems from major suppliers (ref. 1). In this process, Messier-Dowty became a provider of integrated landing gear systems who is responsible for supplying a certifiable landing gear system and providing all the system level performance analysis. The aircraft landing gear system retractio...

THE RELATIONSHIP BETWEEN LANDING ERROR SCORING SYSTEMREAL TIME AND DORSIFLEXION RANGE OF MOTION IN RECREATIONAL ATHLETES Hannah Martha Twiddy Old Dominion University, 2016 Director: Dr. Johanna Hoch Participation in physical activity is important for overall health; however, lower extremity injuries are a major risk associated with physical activity. Injuries can lead to time away from physical...

guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. in this study automatic landing control systems are introduced and an optimal landing control system is designed. the control system performance criteria are based on minimum control effort. the designed system is simulated for a tr...

Managing operations of the aircraft approach process and analyzing runway landing capacity, utilization and related risks require detailed insight into the stochastic characteristics of the process. These characteristics can be represented by probability distributions. The focus of this study is analyzing landings on a runway operating independent of other runways making it as a single runway. ...

Aim In the present study, we investigated the prevalence of E. coli pathotypes and Shigella sero-groups and their antimicrobial profiles among diarrheic children in Nairobi city, Kenya. Background Although diarrheagenic E. coli pathotypes and Shigella sero-groups are leading causes of diarrhea in children under five years in developing countries, their distribution and antimicrobial resistanc...

Windowed orthogonal frequency-division multiplexing (OFDM) and wavelet OFDM have been proposed as medium access techniques for broadband communications over the power line network by the standard IEEE 1901. Windowed OFDM has been extensively researched and employed in different fields of communication, while wavelet OFDM, which has been recently recommended for the first time in a standard, has...

OBJECTIVES To report on the changes in fibrinolytic activity in human immunodeficiency virus (HIV) infected pregnant women who are undergoing highly active antiretroviral therapy (HAART). METHODS Blood was collected from 50 HIV positive women on HAART (test subjects), and 50 HIV positive women not on HAART (controls). These women were attending the prevention of mother to child clinic (PMTCT)...

This paper argues that it would be useful for ergonomists and experienced English Language Teaching (ELT) professionals to collaborate as this would be of substantial interest to both sets of professionals. The ongoing debate in ELT on International English (IE) might usefully help to guide ergonomists if and when they require to judge that English is used at appropriately high levels in the wo...