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3492. Flare activity and photoelectric measurements of magnetic and velocity fields
- Creator:
- Klvaňa, M. and Bumba, V.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- solar flares, photoelectric magnetograph, and magnetic and velocity fields
- Language:
- Czech
- Description:
- The feasibility of using the new photoelectric magnetograph of the Ondřejov Observatory for measuring fast changes in the magnetic and velocity fields of active regions is considered. Large line-of-sight motions were found in growing and decaying sunspots related with areas of magnetic field boundaries and gradients.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3493. Flare activity on HD 12211
- Creator:
- Rovithis, P. and Rovithis-Livaniou, R.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- astrophysics and flare activity
- Language:
- Czech
- Description:
- In this paper the flare like phenomena observed in the eclipsing binary star HD 12211 are presented.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3494. Flares above sunspots and magnetic fields
- Creator:
- Babin, A. N. and Koval, A. N.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- flares and magnetic fields
- Language:
- Czech
- Description:
- For five flares we have considered magnetic fields, measured in the flaring region and underlying sunspots. Main results: a) magnetic field in flare is longitudinal, buf it is mainly transversal in fhe sunspol which the flare is situated on; b) magnetic field strengths measured by Zeeman splitting of Ihe emission lines ol Fel, D1, and D-2 Nal, D3 Hel and Hα reach 1000-3000G, offen exeeeds ones determined by absorption lines in underlying sunspols; e) it appears fhat in flare the magnetic field changes slowly wifh heighf, so far as its vaues estimated by emission lines of helium, hydrogen and metal are approximately equal.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3495. Flares activity during solar cycle 21
- Creator:
- Dinulescu, Simona and Dinulescu, Vasil
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- solar flares and solar activity
- Language:
- Czech
- Description:
- The present paper investigates the statistical behaviour of the solar flares through cycle 21 (1976-1986). The total number of solar flares and the number of flares of various importance are given. The year of maximum of all events was 1980 with 10132 flares. The subflares háve had their maximum values in 1979 (9278 events) and in 1980 (9273 events) while, the other flares reached the maximum two - three years later. The asymmetry A for subflares and importance 1 flares favour the Southern hemisphere (A= -2.8 and -0.9) but thal of importance >2, the northem hemisphere (A= +3.6). The maximum number of flares with importance >2 (Fmax) in solar cycle 21 took place two years later than the maximum number of solar spots (Rmax) but Fmax in cycle 20 appeared one year before Rmax and for cycle 19 in the same year of Rmax.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3496. Flašinetáři: od "lidí světem jdoucích“ k buskingu
- Creator:
- Hanáková, Martina
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- barrel organ, mechanical musical instrument, street musicians, František Hais, busking, beggary, and broadside ballads
- Language:
- Czech
- Description:
- The study focuses on the phenomenon of barrel-organ playing in the context of Bohemian and Moravian streets and countryside from the beginning of its occurrence in our lands to date. The foreword describes the organologic nature of the instrument and its production. The major part of the work is a summary of available sources about a barrel-organ player: his role in the life of people, whether during their daily encounters with an "itinerant" person, or his activity in the realm of customary tradition. The role of barrel-organ players has changed, in comparison to modern-day barrel-organ players - buskers as well as members of a barrel-organ playing club who returned to the streets after 1989. Both lines of barrel-organ players are themes of particular chapters (Barrel-Organ and Busking; A Club of Friends of Mechanical Music and Barrel-Organs). The study ́s goal is to outline a unifying line between the historical and the contemporary practice in barrel-organ playing, as well as it explains when these trends diverge.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3497. Flat disk models-rotation curves and a new model for Milky Way
- Creator:
- Akyol, M. Ünal
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- space research, flat disk models for galxies, and Milky Way
- Language:
- Czech
- Description:
- Flat disk models for galaxies are studied on the basis of osscillations of distributed mass around equilibrium configuration. Convincing perspectives to existing galaxy types are available. Several kinds of galactic orbits are possible with peculiar rotation curves. Supersonic and very high velocities seem likely in the central region. Conventional rotation curve breaks into two, inner to the Solar circle and spiral arms. A new model for our galaxy is proposed.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3498. Flexibilní lékařské endoskopy
- Creator:
- Křížek, Miloslav
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Czech
- Description:
- This article deals with flexible medical endoscopes which with help of optical fibres and CCD elements enable doctors to examine noninvasively human body cavities, to document found facts and to establish the diagnosis. In addition, via these instruments it is also possible to apply surgical tools for therapeutical operation.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3499. Flora, Emma a Katinka. Příspěvek k dějinám inkunábulistiky
- Creator:
- Kamil Boldan
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- druhá světová válka (1939-1945), knihovny, knižní obchod, World War (1939-1945), libraries, book trade, sčítání incunábulí, země a univerzitní knihovna v Praze, Pruská státní knihovna v Berlíně, evakuace vzácných knih, knižní obchod v 15. století, census of incunabula, land and university library in Prague, Prussian state library in Berlin, evacuation of rare books, book trade in the 15th century, 8, and 930
- Language:
- Czech
- Description:
- The article deals with the union catalogue of incunabula, which began to be created during the Protectorate of Bohemia and Moravia. In the 1950s and 1960s, the long-term head of the manuscript department of the present-day National Library Emma Urbánková was trying to complete it, but it was eventually not published in print. It has recently been made available in digital form., Kamil Boldan., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3500. Fluorescenční detekce emulzních mikrokapének s řízeným chemickým složením na mikrofluidním čipu
- Creator:
- Pilát, Zdeněk, Institoris, Jakub, Ježek, Jan, Kaňka, Jan, and Zemánek, Pavel
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- optics, optika, optofluidika, mikrokapénky, fluorimetrie, PDMS, and měkká litografie
- Language:
- Czech
- Description:
- We demonstrate a microfluidic system that builds emulsion droplets of water in oil in one chip and provides continuous control of fluorescein concentration in the droplet and fluorescence detection by built in optical fiber. In this fluid flow chip water is mixed with an adjustable amount of fluorescein solution and injected into oil where emulsion droplets of uniform size are formed. Fluorescence from the droplets was detected directly on the chip using optical fibers. Such miniaturized chemical laboratory is useful for applications where chemical reactions or their products can be characterized by optical way. and Demonstrujeme mikrofluidní zařízení, které na jednom čipu vytváří emulzní kapénky vody v oleji s možností plynule měnit koncentraci fluoresceinu v kapénce a detekovat ji zakomponovaným optickým vláknem. V průtočném čipu se vodná fáze mísí s řízeným množstvím roztoku fluoresceinu a vstřikuje se do olejové fáze, kde vytváří kapénky sjednotnou velikostí. Fluorescence kapének byla detekována přímo na čipu optickými vlákny. Taková miniaturizovaná chemická laboratoř nachází uplatnění v aplikacích, kde je možné optickou cestou charakterizovat chemické reakce nebo detekovat jejich produkty.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public