Structural Geology of the Škocjan Caves

The Škocjan Caves are developed inside 300 m thick column of Cretaceous and Paleocene limestones. Most of the underground Reka River flows within the 130 m thick Lipica Formation (K2 4-5). Data from field structural geological mapping (1:500) performed in 1991-1992 (Hankejev Kanal) and in 1997- 2007 (Tiha and Šumeča Jama) are analysed and presented on a new structural geological map. The Reka River follows bedding- plane strike and dip direction in Šumeča Jama and Hankejev Kanal. From the western part of Hankejev Kanal to the ponor in Martelova Dvorana the Reka River flows perpendicular to strike direction of bedding-planes with dip direction of the bedding contrary to river flow. Bedding planes with interbedded slips were especially favourable for the development of initial passages. The bend of the Reka River in Hankejev Kanal is developed at the intersection of multiple fault zones. Cross- Dinaric oriented faults in Podorna Dvorana and at northern edge of Martelova Dvorana can potentially be neotectonically active

Modern Physics Engines for WebGL

S rozvojem hardwaru přichází další využití internetových prohlížečů přenesením interaktivní 3D grafiky. Technologie WebGL ukázala zatím největší potenciál pro vývoj 3D webových aplikací. Cílem této bakalářské práce bylo srovnat aktuální možnosti javascriptových fyzikálních enginů pro WebGL. Konkrétně byly integrovány opensource fyzikální frameworky. V rámci práce byla vytvořena experimentální aplikace, pomocí které jsme vyhodnotili u jednotlivých frameworků jejich úspěšnost, rychlost, kvalitu a sadu funkcí.With the development of hardware comes another use of internet browsers transferring interactive 3D graphics. Technology called WebGL shows a lot of potentials for developing 3D web applications. The aim if this bachelor thesis is to compare actual possibilities of javascript physics engines for WebGL. Specifically we integrated opensource physics frameworks. Within thesis the experimental aplication was created through which we evaluated the various frameworks for their success, performance, quality and feature set.460 - Katedra informatikyvýborn

Morphological and Geological Characteristics of Two Denuded Caves in SW Slovenia

Denudirane ali brezstrope jame lahko velikokrat določimo iz originalne kraške topografije. Za ta članek sem preučila morfologijo in geologijo dveh denudiranih jam. V letu 1994 je bila pri vasi Povir odkrita prva denudirana jama, in sicer ko je gradnja avtoceste Divača-Dane že potekala. Originalno jamsko morfologijo smo lahko določili iz topografskih kart 1:1.000. V letu 1996 pa smo s predhodnimi krasoslovnimi raziskavami še pred začetkom gradnje avtoceste Divača-Kozina določili 4 denudirane jame. Posebno denudirana jama pri kraju Kačiče-Pared je bila morfološko zelo dobro izražena.Denuded or unroofed caves can be identified from original karst topography many times. For this article the morphology and geology of 2 denuded caves were studied. In 1994 first denuded cave was discovered near village Povir when the highway construction Divača-Dane was already taking place. Original cave morphology was realized from topographic maps 1:1.000. In 1996 with preliminary karst studies before beginning of highway construction Divača-Kozina 4 denuded caves were discovered. The one near Kačiče-Pared was very well morphologically expressed

The Use of Structural Geological Terms and their Importance for Karst Caves

Strukturno geološke raziskave na kraških terenih zajemajo enake strukturno geološke izraze kot na drugih geoloških terenih. Ker pa imamo na krasu opravka s posebnimi geomorfološkimi izrazi, se nekateri strukturno geološki elementi, ki so na poseben način povezani z določenimi kraškimi oblikami, uporabljajo kot posebni termini, ki so različni od terminov v uporabi na nekraških terenih. Na slovenskem krasu lahko ločimo dva najpomembnejša strukturna elementa, ki sta pomembna za razvoj jamskih rovov, in sicer lezike in tektonske strukture. Med lezikami so za razvoj inicialnih rovov posebno ugodne tektonsko deformirane lezike. V najdaljših slovenskih jamah, kot so Postojnska, Predjama in Škocjanske jame so za razvoj rovov v inicialnih, kot tudi v starejših in mlajših obdobjih zelo ugodni medplastni zmiki, deformacije narivanja in gubanja ter tektonsko pretrte cone (razpoklinske, porušene in zdrobljene).Structural geological studies on karst areas operate with the same structural geological terms as on other geological regions. But because of special geomorphologic terms characterized for karst areas, some structural geological elements, which are in a special way connected with particular karst forms, are used as a special terms, different from those used on non-karstic areas. For Slovene karst we need to divide two most important structural elements that are important for development of cave passages, bedding planes and tectonic structures. And between bedding planes the ones that are tectonically disrupted are very favorable for development of initial cave passages. In the longest Slovene karst caves as Postojnska jama caves, Predjama and Škocjanske jame caves interbedded movements, thrusting and folding deformations, and tectonically broken zones (fissured, broken and crushed zones) are very favorable for initial, and also for older and younger stages of passage development

Automatic System for Downloading of Scientific Papers

Cílem práce je tvorba aplikace pro automatické stahování vědeckých článků s využitím internetových databází vědeckých publikací. Práce studuje strukturu a způsoby získávání informací o vědeckých dokumentech. Dále popisuje výslednou aplikaci a hodnotí ji na základě úspešnosti testování.Goal of this work is the creation of application designed for automatic downloading of scientific papers by using online databases of scientific publications. This work is studying the structure and means of retrieving information about scientific documents. It also describes the final application and rates it based on results of testing.

Effects of earthquakes in Postojna cave system

Regarding the studied historic references there are sufficient proofs that during the 1st January 1926 earthquake (M=5.6) in Postojna cave system (Sala del Candore or Pralnica) a stalag­mite column of 1 meter in diameter collapsed. This is a not so common event in karst caves and took place due to the close vicinity of the epicentre located at the SE end of Idrija Fault or at the Javorniki Mountain. During earthquakes in karst caves brontides are generally heard, but ground movement is rarely felt. Only strong and close earthquakes can be felt as ground shaking or waving inside the caves also, withsome possible collapses as well.

Historic inscriptions in Predjama cave system and high floods in 2010

High floods of September 2010 partly ruined historic inscription made by charcoal »Slovenski gadje 1882« in Predjama cave system. Regarding studied historic records the September 2010 floods were the highest in Predjama at least since 1882. If we thrust the well-documented floods in 1826 they can even be higher than ones in 2010. In 2010 the water reached 489.60 m above the sea level at entrance parts of the cave and about 485 m at Vetrovna Luknja causing that the old inscription from 1882 was under water and partly destroyed. Another old inscription »Nagel 1748«, probably done by more resistant pencil, did not suffer from the 2010 floods. Contrary, it was twice partly destroyed by carless visitors, first in 1991 and secondly in the period 1991 – 2005

Technology of production parts with a view to exploitation unconventional beam method (LASER)

Diplomová práce je zaměřena na řešení kompletní technologie výroby dílu v podmínkách malé firmy, úzce specializované na použití technologie LASER. Úvodní část práce obsahuje rozdělení metody LASER dle různých kategorií. Zde je zmíněno, v kterých oblastech se laser používá a převážně jaké lasery se využívají v průmyslu. Hlavní část práce je zaměřena na návrh technologie výroby dílu zaměřený na konkrétní zařízení (TRUMATIC L 4030). Další část práce obsahuje bezpečnost práce z hlediska vymezení pojmů, provozu stroje a přehledu nebezpečí. V závěru práce je provedeno technicko-ekonomické zhodnocení vyrobené součásti dle strojních časů a řezné délky.The diploma work is aimed to a the solution of a complete manufactoring technology of an unit in the conditions of a small company which is specialized in the LASER technology use. The introductory part of the work cantains the division of LASER method according to the different categories. There is mentioned in which fields laser is used and especially which kinds of lasers are used in the industry. The main part of the work is aimed to the scheme of the manufacturing technology of an unit which is focused on a concrete device (TRUMATIC L 4030). Further part of the work contains a safety of work from the standpoint of notions, machine operation and dangers review. In the conclusion of the work there is performed a technical and economical evaluation of the manufactured unit according to the machining times and the cutting length.

Energy production and use of fast growing trees

Cílem bakalářské práce je vypracování rešerše na téma produkce a energetické využívání rychlerostoucích dřevin. Dále provést souhrnnou energetickou bilanci produkce rychlerostoucích dřevin. V první části se práce zabývá definicí, vznikem, rozdělením, chemickým složením, důležitými energetickými vlastnostmi biomasy a způsoby, jak je možné energii z biomasy získávat. V další části se práce zabývá rychlerostoucími dřevinami a to především těmi, které jsou pěstovány na území ČR. Je zde zahrnuta historie pěstování, rozdělení a zakládání výmladkových plantáží na území ČR. V poslední části je řešen samotný výpočet energetické bilance produkce rychlerostoucích dřevin na výmladkových plantážích a také je zde pojednáno o ekonomickém hledisku výmladkových plantáží.This bachelor thesis is aimed at the theme production and energy use fast growing trees and implements a comprehensive energy balance of production of fast growing trees. The first part is aimed at definition, origin, sources, chemical composition, important energy properties of biomass and how to obtain energy from biomass. The next part is aimed at fast growing trees, especially those that are cultivated in the Czech Republic. This part includes history of cultivation, sources and establishment of short rotation plantations in the Czech Republic. The last part is aimed at energy balance of production of fast growing trees at the short rotation plantations and it also includes economic aspect of short rotation plantations.

Monitoring of Active Tectonic Structures – Project COST 625

 Za zahodno Slovenijo je značilna zmerna zgodovinska in recentna seizmičnost. Glavni cilj pridružitve Slovenije k projektu COST 625 je bil, da bi z izmenjavo izkušenj in metodologije ugotovili aktivnost ali neaktivnost določenih prelomov v zahodni Sloveniji. V okviru projekta smo se odločili za večletni monitoring, zato smo v zahodni Sloveniji namestili štiri ekstenziometre TM 71. V prvi polovici letu 2004 smo v Postojnski jami na dinarski prelom, ki je od Predjamskega preloma oddaljen okrog 1 km severno, postavili dva inštrumenta. Tretji inštrument je postavljen na Raškem prelomu na JV pobočju Vremščice in četrti v dolini Učje na Idrijski prelom. Peti inštrument TM 71 bo postavljen na Kneškem prelomu, ki se nahaja južno od Ravenskega preloma. Prvi rezultati v Postojnski jami kažejo na manjše horizontalne premike velikosti do 0,05 mm v enem letu.   For Western Slovenia moderate historical to recent seismicity is characteristic. The principal aim for Slovenia to join the COST 625 project was to exchange the experiences and methodology and in this way to determine the activity or non-activity of selected faults in Western Slovenia. Within the project frame we decided for several years of monitoring, and in this sense four TM 71 extensometers were installed in Western Slovenia. In the firsthalf of the 2004 two TM 71 instruments were installed in Postojnska Jama on the Dinaric oriented fault that is situated about 1 km North from Predjama fault. The third instrument was installed on Raša fault on the SE slope of Vremščica and the fourth instrument in Učja valley on Idrija fault. The fifth instrument TM71 will be set upon Kneža fault that is situated south from Ravne fault. The firs tresults from Postojnska Jama are showing the small horizontal movements for 0.05 mm in one year