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On the dispersion equation for a homogeneous, bi-isotropic waveguide of arbitrary cross-section

In this article, we consider the propagation problem inside a waveguide filled with a homogeneous bi-isotropic material. The cross section of the waveguide is assumed arbitrary. By using the classical theory for the 2D Helmholtz equation in the cross section and the null-field approach, we obtain the dispersion equation in an implicit form. The final equation is a potential candidate for the solut

Natural Vision for Artificial Systems, Active Vision and Thought

The visual system in animals and humans consists of a number of information processing units that are here called visual routines. These routines are specialized in handling different cognitive tasks, for example, object recognition, motion, stereo, color, texture, and optic flow. together, these routines contribute to the internal representation of the visual world. On the top of this network of

Is chronic diabetic foot ulcer an indicator of cardiac disease?

OBJECTIVE: To evaluate presence and severity of cardiac disease in individuals with chronic diabetic foot ulcers using echocardiography. METHOD: Eighty consecutive patients with chronic foot ulcers attending the multidisciplinary diabetes foot clinic at Helsingborg Hospital underwent clinical examination, toe blood pressure measurement and a standard echocardiographic examination. RESULTS: Sixty-n

Oestrogen receptors alpha and beta show different associations to clinicopathological parameters and their co-expression might predict a better response to endocrine treatment in breast cancer.

AIMS: The majority of all breast cancers are hormone responsive, traditionally defined by the expression of oestrogen receptor (ER) alpha and/or progesterone receptors. In contrast to ERalpha, the clinical significance of the relatively recently identified ERbeta is still unclear. This study aimed to define the relationship between ERbeta and clinicopathological parameters in a mixed cohort of bre

Tryptophan end-tagging of antimicrobial peptides for increased potency against Pseudomonas aeruginosa.

BACKGROUND: Due to increasing antibiotics resistance, antimicrobial peptides (AMPs) are receiving increased attention. Pseudomonas aeruginosa is a major pathogen in this context, involved, e.g., in keratitis and wound infections. Novel bactericidal agents against this pathogen are therefore needed. METHODS: Bactericidal potency was monitored by radial diffusion, viable count, and minimal inhibitor

Cumulative delivery rate in an in vitro fertilization program with a single embryo transfer policy.

OBJECTIVE: To investigate the cumulative delivery rate for women completing three fresh embryo transfer cycles or giving birth after the first or second transfer cycle in an in vitro fertilization program with a single embryo transfer (SET) policy. SETTING: Privately run infertility clinic in southern Sweden (Skåne region). POPULATION: Four hundred fifty-three consecutive, unselected public patien

Spectrum of disease-causing mutations in protein secondary structures.

Most genetic disorders are linked to missense mutations as even minor changes in the size or properties of an amino acid can alter or prevent the function of the protein. Further, the effect of a mutation is also dependent on the sequence and structure context of the alteration.