Web Portal for Network Traffic Reporting

Cílem této práce je navrhnout a realizovat systém pro přehledné zobrazení reportů o síťovém provozu. Je zde popsán proces návrhu a implementace systému. Práce také představuje dostupné technologie monitorování počítačových sítí, především technologii NetFlow.The aim of this work is to design and implement system for a simple presentation of reports about network traffic. There is described the design and implementation of the system. Work is also represents available technology of monitoring computer networks and especially technology NetFlow.

Modelling Gateway Redundancy Protocols

Tato diplomová práce se zabývá teoretickým rozborem FHRP protokolů. First Hop Redundancy Protocols jsou síťové protokoly, které jsou určeny pro ochranu výchozí brány a také pro zajištění vysoké dostupnosti v síti pomocí redundance směrovačů (bran). Čtenář se nejen seznámí s protokoly VRRP, HSRP a GLBP, ale také se dozví způsoby jejich konfigurace na reálných zařízeních společnosti Cisco. Dále popisuje implementaci protokolu VRRP v simulačním prostředí OMNeT++. Výsledek implementace je ověřen na sadě testovacích topologiích.This master's thesis report deals with the theoretical analysis of FHRP. First Hop Redundancy Protocols are network protocols which are designed to protect the default gateway and also to ensure high availability in the network by using redundancy. The reader becomes familiar with protocols VRRP, HSRP and GLBP and also learn the way how to configure them to on real Cisco devices. It also describes how implement VRRP int the simulated enviroment of OMNeT++. The result of the implementation is verified in the test topologies.

Mechanical design of rotary satellite antenna polarization system

Cílem této bakalářské práce je konstrukční návrh rotačního systému polarizace satelitní antény. Jedná se o součást mobilní satelitní antény umístěné na střešním nosiči osobního auta. Zařízení musí být navrženo tak, aby se dosáhlo přesného polohování a klidného chodu. Musí také odolávat vlhkosti a teplotním výkyvům. Pro danou aplikaci bylo vybráno a zpracováno řešení převodu ozubeným řemenem. Práce obsahuje algoritmus výběru pohonu, řemene a ložisek. Dosažený úhel polarizace je až 180 °. Výsledky této práce umožňují zhotovit funkční polarizaci mobilní satelitní antény.The aim of this bachelor thesis is mechanical design of rotary satellite antenna polarization system. It is a part of a mobile satellite antenna positioned on the roof rack of a passenger car. Device must be designed to achieve precise positioning and smooth running. It must also resist moisture and temperature fluctuations. For this application, there has been selected and developed solution with toothed belt. The thesis includes a selection algorithm of drive, belt and bearings. The achieved polarization angle is 180 °. The results of this paper can be used to produce a functional mobile satellite antenna polarization.

An Examination and proposal of changes in an informative system of stock control in a small company

Předmětem této bakalářské práce s názvem „Posouzení a návrh změn informačního systému pro skladové hospodářství malé firmy“ je návrh optimálního informačního systému pro skladového hospodářství malé zámečnické firmy ZÁMEK. První část práce se zabývá analýzou původního informačního systému. Druhá část práce představuje a hodnotí komerčně dostupné informační systémy pro vedení skladového hospodářství, které jsou aplikovatelné na uvedenou firmu. Cílem práce je předložit návrh optimálního informačního systému skladového hospodářství, který přispěje ke zlepšení vnitropodnikvých procesů a povede ke zvýšení konkurenceschopnosti firmy.This bachelor thesis entitled "An Examination and proposal of changes in an informative system of stock control in a small company" proposes structure of optimal information system for stock management of small locksmith company called ZÁMEK. First part of thesis examine former information system. Second part introduces and evaluate commercially available information systems for stock control which are suitable for the company's needs. The thesis proposes information system for stock management, which will lead to improvements of in-house processes and will increase competitive advantage.

IN-CYLINDER FLOW CHARACTERIZATION USING VORTICITY BASED PARAMETERS

The paper deals with intake swirling flow characterization in the cylinder of IC engine. The commonly used method based on the swirl resp. tumble number from angular momentum flux evaluation does not need to give the appropriate values in some cases. Typically, in the case of two intake ports, a counter-rotating swirl vortex pair is presented. However their summary angular momentum flux is zero a thus corresponding swirl number is zero too. In order to correctly quantify these cases, it is proposed to evaluate so called vorticity numbers, i.e. dimensionless numbers based on vorticity evaluation. Concrete results are evaluated from data obtained using 3-D CFD simulation in AVL FIRE code. Comparison of variously defined vorticity numbers with each other and with the vortex numbers is performed. A practical way of calculating the vorticity numbers was also suggested with regard to possible adverse effects of the velocity gradients at the cylinder wall

Realization of High Dynamic Range Imaging in the GLORIA Network and Its Effect on Astronomical Measurement

Citizen science project GLORIA (GLObal Robotic-telescopes Intelligent Array) is a first free- and open-access network of robotic telescopes in the world. It provides a web-based environment where users can do research in astronomy by observing with robotic telescopes and/or by analyzing data that other users have acquired with GLORIA or from other free-access databases. Network of 17 telescopes allows users to control selected telescopes in real time or schedule any more demanding observation. This paper deals with new opportunity that GLORIA project provides to teachers and students of various levels of education. At the moment, there are prepared educational materials related to events like Sun eclipse (measuring local atmosphere changes), Aurora Borealis (calculation of Northern Lights height), or transit of Venus (measurement of the Earth-Sun distance). Student should be able to learn principles of CCD imaging, spectral analysis, basic calibration like dark frames subtraction, or advanced methods of noise suppression. Every user of the network can design his own experiment. We propose advanced experiment aimed at obtaining astronomical image data with high dynamic range. We also introduce methods of objective image quality evaluation in order to discover how HDR methods are affecting astronomical measurements

Raman Spectroscopic Analysis of Geological and Biogeological Specimens of Relevance to the ExoMars Mission

H.G.M.E., I.H., and R.I. acknowledge the support of the STFC Research Council in the UK ExoMars programme. J.J. and P.V. acknowledge the support of the Grant Agency of the Czech Republic (210/10/0467) and of the Ministry of Education of the Czech Republic (MSM0021620855).Peer reviewedPublisher PD

Discovery of carotenoid red-shift in endolithic cyanobacteria from the Atacama Desert

Las respuestas bioquímicas de las cianobacterias que habitan en las rocas hacia el estrés ambiental nativo se observaron in vivo en uno de los entornos climáticos extremos más desafiantes de la Tierra. La colonización criptoendolítica de cianobacterias, dominada por Chroococcidiopsis sp., Se estudió en una ignimbrita en un área volcánica de gran altitud en el desierto de Atacama, Chile. El cambio en la composición de carotenoides (desplazamiento al rojo) dentro de un transecto a través de la comunidad microbiana dominante de cianobacterias (grosor promedio de ~ 1 mm) se reveló inequívocamente en su microhábitat endolítico natural. La cantidad de carotenoides desplazados al rojo, observada por primera vez en un ecosistema microbiano natural, depende de la profundidad y se incrementa a medida que aumenta la proximidad a la superficie de la roca, como lo demuestra la resonancia Raman y la resonancia puntual del perfil Raman. Se atribuye a un cambio dependiente de la luz en la conjugación de carotenoides, asociado con la estrategia de adaptación a la luz de las cianobacterias. Se propone una hipótesis para el posible papel de un mecanismo de extinción no fotoquímica (NPQ) mediado por la proteína carotenoide naranja (OCP) que influye en el comportamiento espectral observado. Simultáneamente, se obtuvo información sobre la distribución de scytonemin y phycobiliproteins. Scytonemin fue detectado en los agregados de cianobacterias superiores. Se registró un gradiente de intensidad de señal inverso de las ficobiliproteínas, que aumenta con las posiciones más profundas como respuesta del complejo de captura de luz de cianobacterias a condiciones de poca luz.The biochemical responses of rock-inhabiting cyanobacteria towards native environmental stresses were observed in vivo in one of the Earth’s most challenging extreme climatic environments. The cryptoendolithic cyanobacterial colonization, dominated by Chroococcidiopsis sp., was studied in an ignimbrite at a high altitude volcanic area in the Atacama Desert, Chile. Change in the carotenoid composition (red-shift) within a transect through the cyanobacteria dominant microbial community (average thickness ~1 mm) was unambiguously revealed in their natural endolithic microhabitat. The amount of red shifted carotenoid, observed for the first time in a natural microbial ecosystem, is depth dependent, and increased with increasing proximity to the rock surface, as proven by resonance Raman imaging and point resonance Raman profiling. It is attributed to a light-dependent change in carotenoid conjugation, associated with the light-adaptation strategy of cyanobacteria. A hypothesis is proposed for the possible role of an orange carotenoid protein (OCP) mediated non-photochemical quenching (NPQ) mechanism that influences the observed spectral behavior. Simultaneously, information about the distribution of scytonemin and phycobiliproteins was obtained. Scytonemin was detected in the uppermost cyanobacteria aggregates. A reverse signal intensity gradient of phycobiliproteins was registered, increasing with deeper positions as a response of the cyanobacterial light harvesting complex to low-light conditions.• Ministry of Education, Youth and Sports (República Checa) y el National Sustainability Program I (NPU I). Beca LO1415 • CzeCOS ProCES. Proyecto CZ.02.1.01/0.0/0.0/16_013/0001609 • Ministerio de Economía y Competitividad. Proyecto CGL2013-42509P, para Jaket Wierzchos, Octavio Artieda, Carmen Ascaso, María Cristina CaseropeerReviewe

Raman spectroscopy of the Dukhan sabkha: identification of geological and biogeological molecules in an extreme environment

The characterization of minerals and biogeological deposits in a terrestrial Arabian sabkha has a direct relevance for the exploration of Mars since the discovery by the NASA rovers Spirit and Opportunity of evaporate minerals on Mars that could have arisen from aquifers and subsurface water movement. The recognition of carbonates and sulphates in Gusev Crater has afforded an additional impetus to these studies, as relict or extant microbial extremophilic organisms could have colonized these geological matrices, as has been recorded on Earth. Here, we describe the Raman spectroscopic analysis of specimens of evaporitic materials sampled from the Dukhan sabkha, the largest inland sabkha in the Persian Gulf. With daily temperatures reaching in excess of 60°C and extreme salinity, we have identified the characteristic Raman signatures of keybiomolecular compounds in association with evaporitic minerals and geological carbonate and sulphate matrices, which indicate that extremophilic cyanobacterial colonies are existent there. This evidence, the first to be acquired spectroscopically from such a region, establishes a platform for further studies using remote, portable Raman instrumentation that will inform the potential of detection of similar systems on the Martian surface or subsurface in future space missions. A comparison is made between the results from this study and the previous analysis of a gypsum/halite sabkha where the extremophilic molecular signatures were better preserved. © 2010 The Royal Society

Operating Characteristics of a Timber Trailer with a Hybrid Drive

This paper deals with the design and operational evaluation of a timber tractor-trailer unit with a hybrid trailer drive. The source of electrical energy for the two induction motors driving the front wheels of the tandem trailer axle is a battery, which is recharged by an induction machine operating as a generator during periods of a lower demand for power from the tractor diesel engine. An electric drive was designed for the defined working cycle of the tractor-trailer unit, and its loading characteristics were tested in the laboratory. The parameters measured on the field tests during timber forwarding were battery voltage and power, and the energy balance. Three adjustment levels of the potentiometer controlling the trailer hybrid drive (50, 75 and 100%) were tested at three different forwarding distances of 100, 500 and 1000 m. Additionally, any slippage of the prime mover wheels and trailer was measured. The maximum peak power taken from the battery was ca. 33 kW during the field tests, whilst the drive was able to deliver a peak output of up to 72 kW for 10 s and permanently up to ca. 50 kW. Even in harsh terrain conditions, the electric drive assisted the combustion engine only when the loaded tractor-trailer unit was travelling uphill. The hybrid drive operation was sustainable for the whole working shift, without the need for recharging when the potentiometer was set to 50%. This appropriate setting of the potentiometer controlling the trailer's hybrid drive reduced the slipping of the driven wheels of the tractor-trailer unit whilst travelling uphill.O