SMS Encryption for Mobile Communication

Tato práce se zabývá problematikou šifrování krátké textové zprávy (SMS) v mobilní komunikaci. Úvod práce je vyhrazen přehledu prvků v GSM radiotelefonních sítí a přenosu SMS zpráv v ní. Další kapitola se věnuje popisu šifrovacích metod, zejména symetrickým a asymetrickým přístupům šifrování. Návrh šifrování a dešifrování SMS zpráv v mobilní komunikaci je uveden dále. Pro šifrování a podepsání SMS zprávy je použita šifra RSA. Při šifrování se využívá schéma zarovnání OAEP. Veřejný klíč je uložen v certifikátu. Jako vhodná programovací platforma byl vybrán Symbian OS.This thesis deals with encryption of short text message (SMS) in mobile communication. Introduction is dedicated to overview of the parts of GSM radiotelephone nets and SMS messages transfer . Next chapter is reserved for description of cryptographic methods especially symetric and asymetric encryptografic aproaches. A design of a SMS messages encryption and decryption techniques is in next. For SMS encryption and sign, there is used the asymetric cypher RSA. Encryption use OAEP padding schema. The public key is saved in certificate. The Symbian OS has been choosen as a suitable platform for programming of mobile devices.

Constructions of small complete arcs with prescribed symmetry

We use arcs found by Storme and van Maldeghem in their classification of primitive arcs in ${\rm PG}(2,q)$ as seeds for constructing small complete arcs in these planes. Our complete arcs are obtained by taking the union of such a ``seed arc'' with some orbits of a subgroup of its stabilizer. Using this approach we construct five different complete 15-arcs fixed by $\Z_3$ in ${\rm PG}(2,37)$, a complete 20-arc fixed by $\S_3$ in ${\rm PG}(2,61)$, and two different complete 22-arcs fixed by \D_5 in ${\rm PG}(2,71)$. In all three cases, the size of complete arcs constructed in this paper is strictly smaller than the size of the smallest complete arcs (in the respective plane) known so far

Vibrodiagnostics of Multilathe Machining Centers.

Diplomová práce se zabývá měřením, analýzou a vyhodnocením technického stavu tří výrobních strojů Multilathe. Jedná se o vysokootáčková obráběcí centra, která jsou ve společnosti Česká zbrojovka a.s. využívána pro výrobu dřevěných pažeb střelných zbraní. Pro zjištění technického stavu byla využita metoda bezdemontážní technické diagnostiky konkrétně vibrodiagnostiky. Měření se provádělo přístrojem Adash A4400 VA4 Pro a vyhodnocení bylo provedeno v softwaru Virtual Unit VA4Pro. V závěru práce jsou porovnány velikosti vibrací strojů pro lepší orientaci v jejich technickém stavu.The master thesis deals with detection, analysis and evaluation technical conditions of the three Multilathe production machines. It is a high-speed machine centers that are in the company of Ceska zbrojovka a.s. used for production gunstocks firearms. To determine the technical condition was used non-invasive metod, specifically vibrodiagnostic. For detection of the technical condition was used Adash A4400 VA4 Pro and evaluation were performed in software Virtual Unit VA4Pro. Finally, we compared the magnitude of vibration of the machines for better understanding of their technical condition.340 - Katedra výrobních strojů a konstruovánívýborn

Comparison of the Lathe STP 16 NC Parameters in Regards to a Renovation

Import 23/07/2015Bakalářská práce se zabývá porovnání parametrů soustruhu SPT 16 NC s ohledem na renovaci. Ke zjištění technického stavu je použito dvou metod bezdemontážní technické diagnostiky a to vibrodiagnostiky a tribodiagnostiky. Byly provedeny dvě kontroly technického stavu soustruhu. První měření se specializovalo na odběr mazacích kapalin a zjištění vibrací stroje SPT 16 NC 1 před generální opravou. Při druhém měření se zjišťovaly vibrace stroje SPT 16 NC 1 po renovaci a stroje SPT 16 NC 2. Na závěr je provedeno srovnání technického stavu diagnostikovaných soustruhů.The bachelor thesis deals with comparison of the lathe SPT 16 NC parameters in regards to the renovation. To determine the technical condition is used two methods of technical diagnostics: vibrodiagnostics and trobodiagnostics. There were conducted two controls of the technical status of the lathe. The first measurement is focused on the consumption of lubricating fluids and vibration detection machine SPT 16 NC 1 before overhaul. In the second measurement is investigated vibration machine SPT 16 NC 1 after renovation and machine SPT 16 NC 2. In the final chapter is made comparison of the technical condition diagnosed lathes.340 - Katedra výrobních strojů a konstruovánívýborn

La Ferrassie 1: New perspectives on a "classic" Neandertal.

The La Ferrassie 1 (LF1) skeleton, discovered over a century ago, is one of the most important Neandertal individuals both for its completeness and due to the role it has played historically in the interpretation of Neandertal anatomy and lifeways. Here we present new skeletal remains from this individual, which include a complete right middle ear ossicular chain (malleus, incus, and stapes), three vertebral fragments, and two costal remains. Additionally, the study of the skeleton has allowed us to identify new pathological lesions, including a congenital variant in the atlas, a greenstick fracture of the left clavicle, and a lesion in a mid-thoracic rib of unknown etiology. In addition, we have quantified the amount of vertebral pathology, which is greater than previously appreciated. We have complemented the paleopathological analysis with a taphonomic analysis to identify any potential perimortem fractures. The taphonomic analysis indicates that no surface alteration is present in the LF1 skeleton and that the breakage pattern is that of bone that has lost collagen, which would be consistent with the intentional burial of this individual proposed by previous researchers. In this study, we used CT and microCT scans in order to discover new skeletal elements to better characterize the pathological lesions and to quantify the fracture orientation of those bones in which the current plaster reconstruction did not allow its direct visualization, which underlines the broad potential of imaging technologies in paleoanthropological research. A century after its discovery, LF1 is still providing new insights into Neandertal anatomy and behavior

Combinatorial families enumerated by quasi-polynomials

AbstractWe say that the sequence (an) is quasi-polynomial in n if there exist polynomials P0,…,Ps−1 and an integer n0 such that, for all n⩾n0, an=Pi(n) where i≡n(mod s). We present several families of combinatorial objects with the following properties: Each family of objects depends on two or more parameters, and the number of isomorphism types of objects is quasi-polynomial in one of the parameters whenever the values of the remaining parameters are fixed to arbitrary constants. For each family we are able to translate the problem of counting isomorphism types of objects into the problem of counting integer points in a union of parametrized rational polytopes. The families of objects to which this approach is applicable include combinatorial designs, linear and unrestricted codes, and dissections of regular polygons

Technical Means of Flood Protection

Import 29/09/2010Bakalářská práce se zabývá technickými prostředky protipovodňové ochrany. V této práci jsem nastínil základní principy prostředků protipovodňové ochrany. A také jsem zhodnotil prostředky z hlediska ekonomického, aktivace a celkové efektivity. U mobilních protipovodňových systémů jsem uvedl novinky.The bachelor thesis deals with the technical means of flood protection. In this paper, I outlined the basic principles of flood protection systems. And I also evaluated these systems in aspect of economic resources, the overall efficiency and activation. I also mentioned inovations for flood-Mobile systems.Prezenční030 - Katedra požární ochrany a ochrany obyvatelstvavýborn

Territory Categorization for the Needs of Civil Protection

Import 03/08/2012Tato diplomová práce se zabývá stanovením základních zásad pro kategorizaci území obcí České republiky. Jsou zde uvedeny základní zásady hodnocení území a jejich kritéria. Také jsou zde stanoveny kategorie území pro potřeby ochrany obyvatelstva a postup zařazení území obcí do těchto kategorií.This thesis deals with the basic principles for the categorization of the municipalities in the Czech Republic. Inside are presented basic principles of area reviews and their criteria. Also, there are categories established for the public safety and the procedures for inclusion of the municipalities in these categories.Prezenční050 - Katedra ochrany obyvatelstvavelmi dobř