We present criteria of Hille-Nehari-type for the linear dynamic equation (r(t)yΔ)Δ + p(t)yσ = 0, that is, the criteria in terms of the limit behavior of ( t a 1/r(s)Δs) ∫∞ t p(s)Δs as t→∞. As a particular important case, we get that there is a (sharp) critical constant in those criteria which belongs to the interval [0,1/4], and its value depends on the graininess μ and the coefficient r. Also ...

BACKGROUND The 12-lead electrocardiogram (ECG) has relatively poor specificity for identifying acute pulmonary embolism (APE). The aim of this study was to investigate ECG abnormalities according to 2 different criteria and their usefulness for assessing changes in APE. METHODS AND RESULTS Fifty-two APE patients underwent ECG examinations in the acute and chronic phases. ECG abnormalities wer...

We present several new criteria for the oscillation of the second-order linear equation y(t) + q(t)y(t) = 0, in which the coefficient q may or may not change signs. The criteria involve the integral ∫ tq(t) dt for some γ > 0. The special case γ = 2 is then studied in greater details. AMS Subject Classification: 34C10

Consider the second order nonlinear differential equations with damping term and oscillation’s nature of ( ( ) '( )) ' ( ) '( ) ( ) ( ( )) ( '( )) 0 r t x t p t x t q t f x t k x t    0 t t  (1) to used oscillatory solutions of differential equations ( ( ) '( )) ' ( ) ( ( )) ( '( )) 0 t x t t f x t k x t     (2) where ( ) t  and ( ) t  satisfy conditions given in this work paper. Our ...

In this paper, we propose new sets of criteria for exponential robust stability of Takagi-Sugeno (T-S) fuzzy Hopfield neural networks. The L2−L∞ approach is applied to obtain new sets of stability criteria, under which T-S fuzzy Hopfield neural networks reduce the effect of external input to a prescribed level. These sets of criteria are presented based on the matrix norm and linear matrix ineq...

An important theme that emerges from all early historical accounts is that in addition to the decreased virulence of Treponema pallidum, the incidence of secondary syphilis has decreased drastically over the past three centuries. Even in the early 20th century, most syphilologists were of the opinion that the disease had undergone changes in its manifestations and that they were dealing with an...

The aim of the research discussed in this paper is to explore IS/IT outsourcing practices as an information systems strategy in the context of Kuwait as a developing country. In this paper attention will be focused on two of the IS/IT outsourcing dimensions, vendor selection criteria, and post-implementation evaluation. Several public and private sector organisations were selected to participat...

OBJECTIVES To determine the correlation between hypertriglyceridemic waist (HTGW) and metabolic syndrome (MS) in adults of Trujillo according to diagnostic criteria. MATERIALS AND METHODS Observational, prospective and cross-sectional study with a sample of 500 adults in Trujillo, selected by probability sampling and stratified by sex and age. Information on anthropometric measurements, blood...

IMPORTANCE When men are depressed they may experience symptoms that are different than what is included in the current diagnostic criteria. OBJECTIVE To explore whether sex disparities in depression rates disappear when alternative symptoms are considered in the place of, or in addition to, more conventional depression symptoms. DESIGN, SETTING, PARTICIPANTS, AND MAIN OUTCOMES AND MEASURES: U...

Attention-deficit/hyperactivity disorder (ADHD) has been shown to continue into old age. Studies in children and younger adults show a reduction in hyperactive-impulsive symptoms, whereas the number of inattentive symptoms stays stable. The current study examined the lifetime stability of ADHD symptoms up to old age. Data on ADHD diagnosis and symptoms were collected in a two-phase side-study (...