T o kick off the millennium, Kent Beck wrote eXtreme Programming eXplained, with all the appropriate capitalization designed to attract attention. 1 This book and the practices behind it have had, and continue to have, a significant impact on the industry,

Taekwondo is famous for its powerful kicking techniques and the roundhouse kick is the most frequently used one. In earlier literature, the influence of a physical target (exiting or not) on kicking power generation has not been given much attention. Therefore, the aim of this study was to investigate the kinematics of roundhouse kick execution and its factors related to power generation. 6 ITF...

Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew. Several methods including driller, wait and weight, and concurrent are applicable in the drilling industry to control a well during a kick incident. In this study, typical well control methods wer...

Early Kick Detection (EKD) is one of the most important areas for improvement in well control safety. The need for earlier, more accurate, more reliable kick detection across a wide range of drilling operations has become increasingly important as more operations are being conducted in deep water with increasingly tight pressure margins. In order to accomplish this, it is important to start mea...

We study implications for the apparent alignment of the spin axes, proper-motion directions, and polarization vectors of the Crab and Vela pulsars. The spin axes are deduced from recent Chandra X-ray Observatory images that reveal jets and nebular structure having definite symmetry axes. The alignments indicate these pulsars were born either in isolation or with negligible velocity contribution...

Observations over the last decade have shown that neutron stars receive a large kick velocity (of order a few hundred to a thousand km s−1) at birth. The physical origin of the kicks and the related supernova asymmetry is one of the central unsolved mysteries of supernova research. We review the physics of different kick mechanisms, including hydrodynamically driven, neutrino – magnetic field d...

Research on continual computation centers on developing precomputation policies that can e ectively harness available resources to solve future challenges. We focus on integrating a consideration of o ine and real-time resources in continual computation. We review precomputation policies for exible procedures and present strategies that account for the expected future real-time re nement of a r...

The purpose of this study was to identify those foot techniques in taekwondo to the head with the highest potential for success in competition. We compared five of the most frequently used kicks, the round kick, front leg axe kick, clench axe kick, jump spin back kick and jump spin hook kick. Since the right timing and fast movements vastly determine success, we looked at the reaction time, exe...

Balance is a common coaching cue and technical factor associated with kicking in the football codes. The aim of this study was to compare balance ability and maximal kick performance for the punt kick. Fifteen elite junior Australian Football players performed maximal punt kicks with their preferred and non-preferred legs with foot and ball speed calculated using VICON. Balance ability was asse...