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2. Aplikace nelineárních optimalizačních metod při vyhodnocování módových spekter planárních vlnovodů
- Creator:
- Bárta, Ondřej, Pištora, Jaromír, Vlček, Jaroslav, Staněk, František, and Kreml, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Czech
- Description:
- The paper is focused into the area of experimental research of planar waveguide structures. Dark mode spectroscopy technique, which is based on excitation of guided modes, is presented here in detail. The physical aspects of the method are shortly described with a special focus on coupling prism theory. The main attention of our contribution is devoted to the application of new mathematical optimization methods related to guided modes and the determination of refractive indices and thicknesses of thin films. Keywords: planar waveguide structure, prism coupling, dark mode spectroscopy, non-linear optimization. and Příspěvek je zaměřen do oblasti experimentálního studia tenkovrstvých planárních vlnovodných struktur. Je zde prezentována metoda tmavé módové spektroskopie, která je založena na vybuzení spektra vedených módů ve zkoumané vrstvě. V krátkosti jsou podány základní fyzikální aspekty této metody se zaměřením na teorii hranolové vazby. Detailní pozornost je věnována vlastnímu vyhodnocení naměřených módových spekter a použití matematických optimalizačních metod při určení indexu lomu a tloušťky zkoumaných vlnovodných vrstev.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. External morphological differences between Crepidostomum farionis and Crepidostomum metoecus (Trematoda: Allocreadiidae), parasites of salmonids, as revealed by SEM
- Creator:
- Moravec, František
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Trematoda, Crepidostomum farionis, Crepidostomum metoecus, surface morphology, Salmo trutta, and Czech Republic
- Language:
- English
- Description:
- Scanning electron microscopy examinations of trematode specimens belonging to Crepidostomum farionis (O.F. Müller, 1784) and C. metoecus Braun, 1900, collected from brown trout, Salmo trutta fario L., in the Czech Republic, made it possible to study their surface morphology including details not described previously. The tegument of both species bears numerous characteristic papillae around the oral sucker (in C. metoecus also around the ventral sucker) and the ventral and dorsal surfaces of the forebody, exhibiting a high degree of variability in numbers and arrangement, with tegumental bosses forming lateral fields on the forebody and minute sensory receptors with submerged cilia scattered on the surface of the dorsal part of the oral sucker. In addition to marked differences in the size, shape and position of the oral muscular lobes, both species distinctly differ in the number of genital pores: two separate pores in C. farionis and a single pore in C. metoecus.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public