In this paper, chaos in a voltage-mode controlled buck converter is studied. The existence of chaos is proven theoretically in this system. The proof consists of showing that the dynamics of the system is semiconjugate to that of a one-sided shift map, which implies positive entropy of the system and hence chaotic behaviour. The essential tool is the horseshoe hypotheses proposed by Kennedy and...

Cycle life often determines the commercial viability of a particular electrode chemistry or structure. The dramatic structural, crystallographic, and chemical changes that may occur in and around Li-ion battery electrodes can severely affect their cycle life. This provides a clear motive for developing an improved understanding of the nature of chemical and structural changes associated with el...

OBJECTIVE To investigate the relationship between low-grade inflammation (LI) and increased arterial stiffness in Chinese youth and adolescents with newly-diagnosed type 2 diabetes mellitus (T2DM). METHODS Ninety-eight subjects aged 10 to 24 years with newly-diagnosed T2DM were investigated for findings of general inflammation. Anthropometric measurements were taken. Data related to arterial ...

Mitochondrial labile iron (LI) plays a crucial role in oxidative injuries and pathologies. At present, there is no organelle-specific sensitive iron sensor which can reside exclusively in the mitochondria and reliably monitor levels of LI in this organelle. Here we describe the development of novel fluorescent and highly specific mitochondria iron sensors, using the family of mitochondrial-homi...

In this paper we provide a connection between the geometrical properties of the attractor of a chaotic dynamical system and the distribution of extreme values. We show that the extremes of so-called physical observables are distributed according to the classical generalised Pareto distribution and derive explicit expressions for the scaling and the shape parameter. In particular, we derive that...

Objective: To compare the validity of a new index (Hb×RDW×100/ (RBC)2×MCHC) with twelve discriminating functions (DFs) to differentiate iron deficiency anemia (IDA) and beta-thalassemia trait(ß –TT). Methodology: A total of 823 patients (317 IDA and 506 ß –TT) aged 15 to 35yearold were enrolled in this study. The diagnostic sensitivity, specificity and other validity parameters were calculated ...