Racket’s chaperone and impersonator language constructs provide run-time support for implementing higher-order contracts on mutable structures and abstract datatypes. Using chaperones and impersonators, contracts on mutable data can be enforced without changing the API to that data; contracts on large data structures can be checked lazily on only the accessed parts of the structure; contracts o...

Although badminton is played in many parts of the world, it is most popular in South-East Asia. It is a racket game with a shuttlecock played as singles between two or as doubles between four players. The racket is similar to a squash racket but much lighter. The shuttlecock is almost cone-shaped, 31 in. long with a diameter of 21 in. at one end and i in. at the other. Most ocular injuries occu...

The number of wheelchair tennis players is rising internationally, yet from a scientific perspective little known about performance. Wheelchair more complex compared to other court sports, due the wheelchair/racket interaction. purpose this narrative review was gain insight into influence configuration, i.e., individual set-up wheelchair, on performance, specifically mobility performance and pr...

Bats (Mammalia: Chiroptera) have sophisticated acoustic abilities adapted to many uses, including both echolocation and social vocalisations. Social vocalisations are used in a wide variety of contexts vary greatly arrangement complexity. Among the most intricate courtship songs that males certain species use attract mates advertise their qualities. To date, however, few studies examined phonol...

The aim of the present study was to determine whether training-related alterations in muscle mechanoreflex activation affect cardiac vagal withdrawal at the onset of exercise. Eighteen male volunteers divided into 9 controls (26 +/- 1.9 years) and 9 racket players (25 +/- 1.9 years) performed 10 s of voluntary and passive movement characterized by the wrist flexion of their dominant and non-dom...