BACKGROUND The natural history of hip instability (without subluxation or dislocation) and treatment in infants remain controversial. We performed a retrospective cohort case-only study with blinded, prospectively collected data to assess normalization of the acetabular index in consecutive untreated infant hips with sonography instability. METHODS Consecutive hips meeting inclusion criteria ...

BACKGROUND To our knowledge, detection of cardiorespiratory instability using noninvasive monitoring via electronic integrated monitoring systems (IMSs) in intermediate or step-down units (SDUs) has not been described. We undertook this study to characterize respiratory status in an SDU population, to define features of cardiorespiratory instability, and to evaluate an IMS index value that shou...

A ground-based microwave radiometer gives the possibility of providing continuously available temperature and humidity profiles of the troposphere, from which instability indices of the atmosphere could be derived. This paper studies the possibility of correlating the radiometer-based instability indices with the occurrence of intense convective activity, namely, the occurrence of lightning. Th...

1 Measurement properties of the Western Ontario Shoulder Instability Index 1 in Dutch patients with shoulder instability 2 3 Just A. van der Linde, MD*, W. Jaap Willems, MD, PhD¶, Derk A. van Kampen, MD, PhD^, 4 Loes W.A.H. van Beers, MSc*, Derek F.P. van Deurzen, MD*, Caroline B. Terwee, PhD§ 5 6 * Department of Orthopaedic Surgery and Traumatology, Onze Lieve Vrouwe Gasthuis, 7 Amsterdam, the...

The dynamical properties of finite dynamical systems (FDSs) have been investigated in the context of coding theoretic problems, such as network coding and index coding, and in the context of hat games, such as the guessing game and Winkler’s hat game. In this paper, we relate the problems mentioned above to properties of FDSs, including the number of fixed points, their stability, and their ins...

BACKGROUND The Western Ontario Shoulder Instability index (WOSI) is a patient-reported outcome measure for patients with shoulder instability. The purpose of this study was to validate the WOSI in a Dutch population by evaluating its structural validity, internal consistency, measurement error, reliability, and construct validity. Floor and ceiling effects were also addressed. METHODS Two coh...

We investigate the Jeans instability of a galactic disk embedded in a dynamically responsive dark halo. It is shown that the disk-halo system becomes nominally Jeans unstable. On small scales the instability is suppressed, if the Toomre stability index Q T is higher than a certain threshold, but on large scales the Jeans instability sets invariably in. However, using a simple self-consistent di...

Gastrointestinal Cancers (GICs) are the most important causes of mortality and morbidity in industrialized world. Sister chromatid exchange (SCE), as an index of chromosomal instability, involves cancer. The aim of this study is to determine whether SCE frequency is a heritable factor for GIC or not. The study groups consisted of 15 gastrointestinal carcinoma patients, 13 patient relatives and ...

Spatial structures as a result of a modulational instability are studied in a nonlinear cavity with a photonic crystal. The interaction of the modulated refractive index with the nonlinearity inhibits the instability via the creation of a photonic band gap. A novel mechanism of light localization due to defects and pattern inhibition is also described.