Requiring that a Hamiltonian be Hermitian is overly restrictive. A consistent physical theory of quantum mechanics can be built on a complex Hamiltonian that is not Hermitian but satisfies the less restrictive and more physical condition of space-time reflection symmetry (PT symmetry). One might expect a non-Hermitian Hamiltonian to lead to a violation of unitarity. However, if PT symmetry is n...

The question of why receivers accept a selfish signaller's message as reliable or 'honest' has fuelled ample controversy in discussions of communication. The handicap mechanism is now widely accepted as a potent constraint on cheating. Handicap signals are deemed reliable by their costs: signallers must choose between investing in the signal or in other aspects of fitness. Accordingly, resource...

A review of production of activated carbon from waste tire char is presented. This review compiles the work done by various researchers on the characterisation of activated carbon from tire char and its applications in liquid-phase adsorption. Effect of various process parameters particularly activation temperature, burn-off, surface area on the activation stage are reviewed. Influence of activ...

For migratory birds, early arrival and physical condition on the breeding grounds are important determinants of reproductive success and fitness. Differences in arrival times often exceed a month, and later arriving individuals are often in poorer condition. Habitat-specific isotopic signatures indicate that the quality of winter habitats occupied by American redstarts (Setophaga ruticilla) det...

Vaccination is a primary means used to control infectious diseases. Various epidemic models have been developed to find efficient vaccination strategies. However, few models and vaccination strategies have explicitly taken individual mobility into consideration. New models and vaccination strategies are needed for today’s highly mobile society. This paper presents an individual-based epidemic m...

OBJECTIVE The aim of this study was to develop the Transition Readiness Assessment Questionnaire (TRAQ), a measure of readiness for transition from pediatric to adult healthcare for youth with special health care needs (YSHCN). METHODS We administered TRAQ to 192 YSHCN aged 16-26 years in three primary diagnostic categories, conducted factor analysis, and assessed differences in TRAQ scores b...

The purpose of this study was to examine the relationship between the perceived physical health status of Korean adolescents, adults, and elderly adults and their frequency, intensity, time, and duration of exercise. In 2012, 1,144 adolescents (under 18 years old), 6,474 adults (19-64 years old), and 1,382 elderly adults (over 65 years old) participated in the Korean Survey on Citizens' Sports ...

On The Influence of Abnormal Parturition, Difficult Labours, Premature Birth, and Asphyxia Neonatorum, on the Mental and Physical Condition of the Child, Especially in Relation to Deformities By W. J. Little, MD Senior-Physician to the London Hospital; Founder of the Royal Orthopaedic Hospital; VisitingPhysician to Asylum for Idiots, Earlswood; etc. Transactions of the Obstetrical Society of Lo...

BACKGROUND The variety of tasks that characterize police work highlights the importance of being in good physical condition. AIMS To take a first step at standardizing the administration of a job-related test to assess a person's ability to perform the physical demands of the core tasks of police work. The principal research questions were: are test scores related to gender, age and function ...

INTRODUCTION AND OBJECTIVES Several studies have demonstrated that physical fitness in childhood and adolescence is related to cardiovascular risk in adulthood. Current data on the physical fitness of Spanish adolescents are not available. Therefore, the aims of this study were: a) to assess the physical fitness of Spanish adolescents and establish reference values for use in health and educati...