Segmentation of articular cartilage and early osteoarthritis based on the fuzzy soft thresholding approach driven by modified evolutionary ABC optimization and local statistical aggregation

Articular cartilage assessment, with the aim of the cartilage loss identification, is a crucial task for the clinical practice of orthopedics. Conventional software (SW) instruments allow for just a visualization of the knee structure, without post processing, offering objective cartilage modeling. In this paper, we propose the multiregional segmentation method, having ambitions to bring a mathematical model reflecting the physiological cartilage morphological structure and spots, corresponding with the early cartilage loss, which is poorly recognizable by the naked eye from magnetic resonance imaging (MRI). The proposed segmentation model is composed from two pixel's classification parts. Firstly, the image histogram is decomposed by using a sequence of the triangular fuzzy membership functions, when their localization is driven by the modified artificial bee colony (ABC) optimization algorithm, utilizing a random sequence of considered solutions based on the real cartilage features. In the second part of the segmentation model, the original pixel's membership in a respective segmentation class may be modified by using the local statistical aggregation, taking into account the spatial relationships regarding adjacent pixels. By this way, the image noise and artefacts, which are commonly presented in the MR images, may be identified and eliminated. This fact makes the model robust and sensitive with regards to distorting signals. We analyzed the proposed model on the 2D spatial MR image records. We show different MR clinical cases for the articular cartilage segmentation, with identification of the cartilage loss. In the final part of the analysis, we compared our model performance against the selected conventional methods in application on the MR image records being corrupted by additive image noise.Web of Science117art. no. 86

Vplyv dvoch rôznych rastlinných regulátorov rastu na produkčné ukazovatele slnečnice ročnej

The plant growth regulators (PGR) are an organic compounds that modify plant physiological processes. PGR applied to the field crops promotes photosynthesis, stimulates plant growth, improves flowering and protects plants against unfavourable year weather conditions. Listed is an assumption to the yield of high quality. The effects of year weather conditions, biological material (hybrids) and foliar application of two different PGR (Terra-Sorb® Foliar – containing free amino acids and Unicum® – containing Abiestins®) on the yield-forming parameters, seed yield and the oil content in seeds of three selected hybrids of sunflower (NK Brio, NK Neoma, NK Ferti) were studied in this paper. The field poly-factorial experiments were realized during two growing seasons of 2012 and 2013. The experimental area is situated in the maize-growing region (climatic region: warm; climatic sub-region: mild dry or dry; climatic zone: warm and dry, with mild winter and long sunshine) and soil is silt loam Haplic Luvisol. The climatic conditions in chosen experimental years were different in quantities and distribution of precipitation at main growth period of sunflower plants (June to August) and allows evaluating the yield stability between used hybrids and foliar treatments. The results showed that the application of selected PGR has contributed to an increase of sunflower seed yield, mainly through increase the weight of thousand seeds (rp = 0.761; P < 0.001). Similarly, oil content in seeds was significantly higher in treatments with PGR, especially with preparation Terra-Sorb® Foliar containing free amino acids. The study describes the relationship between quality (oil content in seeds) and quantity (seed yield) of sunflower production (rp = ‒0.41; P < 0.01). Results showed that PGR can be an important rationalization tool of the sunflower cultivation technology.Rastlinné regulátory rastu (PGR) predstavujú organické zlúčeniny, ktoré usmerňujú fyziologické procesy v rastlinách. PGR aplikované na poľné plodiny podporujú fotosyntézu, stimulujú rast rastlín, podporujú kvitnutie a chránia rastliny pred nepriaznivými poveternostnými podmienkami. Uvedené je predpokladom pre vysoké a kvalitné úrody. V štúdii bol skúmaný efekt poveternostných podmienok ročníka, genetického materiálu (hybridov) a foliárnej aplikácie dvoch rôznych PGR (Terra-Sorb® Foliar – obsahujúci voľné aminokyseliny a Unicum® – obsahujúci Abiesetíny®) na úrodu a úrodotvorné prvky troch vybraných hybridov slnečnice ročnej (NK Brio, NK Neoma, NK Ferti). Poľné polyfaktorové pokusy boli realizované počas dvoch pestovateľských sezón 2012 a 2013. Pokusná lokalita sa nachádza v teplej kukuričnej výrobnej oblasti (klimatická oblasť: teplá; klimatická podoblasť: suchá; klimatický okrsok: teplý, suchý s miernou zimou a dlhým slnečným svitom; pôda: hnedozem kultizemná). Poveternostné podmienky vybraných experimentálnych rokov boli odlišné v množstve a v distribúcii zrážok v rozhodujúcich rastových fázach rastlín slnečnice ročnej (jún až august) čo umožnilo hodnotiť úrodovú stabilitu hybridov ošetrených danými prípravkami. Výsledky ukázali, že aplikácia vybraných PGR prispela k zvýšeniu úrody, hlavne prostredníctvom zvýšenia hmotnosti tisíc nažiek (rp = 0,761; P < 0,001). Podobne bol pri ošetreniach PGR preukazne vyšší aj obsah oleja v nažkách, najmä pri prípravku Terra-Sorb® Foliar, ktorý obsahoval voľné aminokyseliny. Štúdia popisuje vzťah medzi kvalitou (obsah oleja v nažkách) a kvantitou (úroda nažiek) produkcie slnečnice ročnej (rp = ‒0,41; P < 0,01). Na základe výsledkov experimentu je možné považovať foliárnu aplikáciu PGR na porasty slnečnice ročnej za významný racionalizačný prvok technológie jej pestovania

IPv6 Modelling in OMNeT++

OMNeT++ je diskrétní simulátor hojně používaný k vytváření nejrůznějších síťových simulací. Lze jej dále rozšířit např. frameworkem INET, který obsahuje modely protokolů a zařízení z prostředí TCP/IP síti. V této práci se soustředíme na zkoumání současných možností balíku INET modelovat internetový protokol verze 6. Obzvláště se zaměřujeme na podporu směrování. V rámci implementace pak byly vytvořeny moduly dual-stack směrovače a dual-stack klienta s podporou manuální i automatické IPv6 adresace a statického směrování. Je také představen modul OSPFv3, který poskytuje většinu podpůrných funkcí a je připraven na budoucí vývoj samotného jádra směrovacího protokolu.OMNeT++ is a discrete-event simulator commonly used to build various network simulations. It can be extended by INET framework that supplies models of protocols and devices from TCP/IP environment. This paper explores current capabilities of INET to model IPv6, particularly routing. Implemented extension includes modules of dual-stack router and dual-stack host that support XML-based configuration of IPv6 addressing and static routing. We also introduce an OSPFv3 module that implements most of auxiliary features and is ready for future development of the routing protocol core.

Production of "flange" components on CNC machines

Tato bakalářská práce se zabývá výrobou součásti typu příruba na CNC strojích. Je zde popsána funkce příruby v sestavě nádrže. Zadané téma obsahuje volbu materiálu, volbu polotovaru a návrh strojového zařízení pro výrobu. Dále je zde vytvořen technologický postup výroby a NC programy pro různé řídicí systémy. Na závěr je vyroben prototyp, který je poté zhodnocen.This bachelor thesis deals with the production of flange type components on CNC machines. The flange function in the tank assembly is described here. The work includes choice of material, choice of semifinished product and proposal of machinery for production. Also, there is a technological process and NC programs for various control systems. Finally, a prototype is produced, which is then evaluated.

Eluding and Evasion of IDS Systems

Tato práce se zabývá analýzou síťových bezpečnostních prvků zvaných IDS systémy. Za účelem poukázání na možné nedostatky jsou zkoumány zejména síťové IDS systémy pro vyhledávání vzorů a navrženy techniky, které využívají možných zranitelností těchto systémů. Na základě těchto technik byla navržena a vytvořena aplikace, která umožňuje snadné testování účinnosti IDS systémů. A to takovým způsobem, který je zcela nezávislý na konkrétním síťovém útoku použitém v rámci testu.This paper analyzes network security devices called intrusion detection (ID) systems. In order to point out possible flaws, especially ID systems using signature analysis are examined. Based on this, methods to exploit possible vulnerabilities of these systems were designed. These methods were implemented into a simple program for ID systems efficiency evaluation. It can be used in a way entirely independent of particular network attack used in the test.

Military Symbology and Schemes of Battalion Task Force in Selected Tactical Activities (Learning Tool)

This paper deals with the use of military symbology in accordance with the current standard of the North Atlantic Treaty Organization (NATO) APP–6C from 2012. It analyses the current state of the topic, especially the available resources dedicated to military symbology and schemes of tactical activities of units. The paper defines the procedures and principles in creating tactical symbols and principles for their use in tactical situations. One of the annexes of is an overview of the most common tactical symbols, which provides a standardized, structured set of graphic symbols identifying the most common units, equipment, lines, areas and maneuvers with respect to the current state of the Army of the Czech Republic. This examination also provides the user, through the presentation of MS Office, a comprehensive overview of tactical symbols, as well as short instructions for their use. These symbols can also be removed from the presentation and can be used by the user as the necessary basis for creating one’s own diagrams of tactical situations. The next part of this thesis deals with the design of new variants of schemes selected for use in tactical operations of a battalion task force. This schema set is available to the user as well in a presentation of MS Office. Individual schemes are drawn to ensure the required clarity and so this presentation can be used for teaching and by students. This work is a learning tool which can be used by students of The University of Defense especially in subjects like Tactics of Units and Tactics of Formations and, other fields of study as well as in military practices of the units of the Army of the Czech Republic (ACR)

REGULATION OF PRODUCTION PERFORMANCE OF CHICORY PLANTS BY FOLIAR APPLICATION OF BIOLOGICALLY ACTIVE SUBSTANCES

In this study were evaluated both the growth and yield potentials of three chicory (Cichorium intybus var. sativum) varieties (\u27Fredonia Nova\u27, \u27Oesia\u27 a \u27Maurane\u27) growing in natural agro-ecological conditions from 2006 to 2008. Regulation of the crop productivity by foliar application of biologically active substances (Atonik, Polybor 150, and Biafit Gold) was also studied. Evaluation of growth-production performance of chicory was realized as: leaf area index (LAI), photosynthetic potential (LAD), net assimilation rate (NAR), crop rate growth (CGR), relative growth rate (RGR), harvest index (HI), root yield and inulin content in root. During threeyears of experimental seasons, the highest average yield of chicory roots was observed in variety \u27Fredonia Nova\u27 (value 2.08 kg m-2), with average LAI reached on value 1.88 and average NAR on value 2.15 g m-2 d-1. The highest average HI was observed in variety \u27Oesia\u27 (64.0 %) and the lowest in variety \u27Maurane\u27 (57.3 %). The highest average inulin root content reached variety \u27Fredonia Nova\u27 up to value 205.9 mg g-1 dry weight. In this study we discussed in detail observed interaction between individual growth-production characteristics. Finally we observed that application of biologically active substances (BAS) is an important tool for optimalization of growthproduction potential in chicory plant. Our results showed that application of BAS (and mainly of Atonik) in all the varieties and experimental years significantly increased the growth-production performance and modified source – sink relationships

Pendulum Energy Harvester with Amplifier

This paper presents a new principle of inductive vibration power harvester. Harvester is a pendulum that uses energy capacitor which is the mass. The mass is connected to the pendulum via a gearbox to achieve greater movement of the pendulum that generates an electromagnetic voltage. The harvester is developed at a very low frequency (1-10 Hz) which uses the rectified magnetic fluxes. Magnets are statically placed in the harvester case, and relative motion is carried out by the coil. Magnets are static, and the coil moves due to the weight ratio of magnets which the steel leads of the magnetic flux and the coil itself. This paper is focused on a harvester with a mechanical amplifier with the proposed technique is brings the plow harvester access with an auxiliary force. The experimental results indicate that the optimal results of the harvester with an accumulator for the resonant zone are 3.75 Hz, 7 Hz, and 10 Hz