ANALIZA POLA EMG W MIKRO/NANOSKOPOWYCH MODALECH MATERII

We discuss a numerical model (macro/micro/nanoscopic) to enable more accurate analysis of electro-hydro-dynamic (EMHD) processesin water at the level of atoms. Dedicated experiments have shown that inserting a relatively homogeneous periodic structure (deionized, degassed,or distilled H2O) in a magnetic field will influence the atomic basis, molecules, and relevant bonds. In this context, the present paper focuseson the designing, analysis, and evaluation of the behavior of an extensive system that represents H2O from the microscopic perspective, and it also outlines the properties and changes of the bonds in the examined water samples. Complementarily, a simple example is used to define the results obtainedfrom analyses of the generated spiral static gradient magnetic and non-stationary gradient electromagnetic fields from the frequency range of f = 1 GHzto 10 GHz.W artykule przedyskutowano (makro/mikro/nanoskopowy) model numeryczny przeznaczony do dokładniejszej analizy procesów elektrohydrodynamicznych (EMHD) w wodzie na poziomie atomowym. Przeprowadzone w tym celu eksperymenty wykazały, że wprowadzenie względnie jednorodnej struktury okresowej (dejonizowanej, odgazowanej lub destylowanej wody w polu magnetycznym wpłynie na strukturę atomową, molekułyi odpowiednie wiązania. W tym kontekście niniejszy artykuł koncentruje się na projektowaniu, analizie i ocenie zachowania rozległego systemu, który reprezentuje H2O z perspektywy mikroskopowej, a także nakreśla właściwości i zmiany wiązań w badanych próbkach wody. Dodatkowo, zastosowano prosty przykład służy do definiowania uzyskanych wyników na podstawie analizy statycznych, spiralnych statycznych gradientowych i niestacjonarnych gradientowych pól elektromagnetycznych w zakresie częstotliwości od 1 GHz do 10 GHz

The Effect of a Spiral Gradient Magnetic Field on the Ionic Conductivity of Water

We discuss the experimental verification of changes in the structure of a liquid water sample inserted in a special spiral “gradient” magnetic field. The magnetic flux components are characterized by a high degree of inhomogeneity; thus, a gradient is found in the monitored section of space. The relevant measurement of the modified, rearranged water sample pointed to a specific ion conductivity lower than that of the untreated water. The results of the experiment, where a sample of demineralized water was exposed to a spiral “gradient“ magnetic field for the period of 5 min, show decreased ion conductivity in the examined samples

Information Society and the Internet

Internet has an important role in the society. Internet is one of the most important factors to transmit and receive information. Information in electronic form has advantages and risks. The aim of this work is to describe the advantages and risks and recommend how to proceed in a given situation. In the first part we will work with demarcation of the importance of information and what information is. There is no a single view on information. Here we meet with the definitions of various disciplines. In the second part of the work is described the computerization of the pros and cons associated with that new approaches and technologies have brought. The aim of the computerization is to come to the emergence of the Internet and characterized the current information society in a few selected contexts, when the society is dependent on modern information networks and information

Trends in corporate IS (Social networks, Social CRM)

This diploma thesis deals with a new trend in the corporate sector -- social networks. These in fact have become a phenomenon due to its growing popularity in recent years. The aim of this thesis is to introduce the social networks in a broader context -- especially the analysis of milestones of social networks. Further comparison of selected social networks from the perspective of business alias what options the company offers a social network for your presentation with access to user data (Social CRM). The third part of the aim of this work is to analyze the critical factors in the integration of social networks into the enterprise information system. The work can be divided into the descriptive (Chapters 2-4) and the practical (Chapters 5-6) part. The first part presents the social networks, the concept of Social CRM and basic characteristics of systems integration. The practical part is focused on all those aims. Author of the work receives information primarily from the electronic information resources that are available at University of Economic in Prague and also from various sources that are on the principle of Web 2.0 (Czech and foreign). Finally, the author also receives information from social networks (social networks options). The work serves as a summary and mapping of existing communication channels on the Internet (e-mail, IRC, selected social networks) and summarizes the critical factors in the integration of social networks into the enterprise information system according to the individual project phases

Unsupervised Pathological Area Extraction Using 3D T2 and FLAIR MR Images

This work discusses fully automated extraction of brain tumor and edema in 3D MR volumes. The goal of this work is the extraction of the whole pathological area using such an algorithm that does not require a human intervention. For the good visibility of these kinds of tissues both T2-weighted and FLAIR images were used. The proposed method was tested on 80 MR volumes of publicly available BRATS database, which contains high and low grade gliomas, both real and simulated. The performance was evaluated by the Dice coefficient, where the results were differentiated between high and low grade and real and simulated gliomas. The method reached promising results for all of the combinations of images: real high grade (0.73 ± 0.20), real low grade (0.81 ± 0.06), simulated high grade (0.81 ± 0.14), and simulated low grade (0.81 ± 0.04)

Unsupervised Pathological Area Extraction using 3D T2 and FLAIR MR Images

This work discusses fully automated extraction of brain tumor and edema in 3D MR volumes. The goal of this work is the extraction of the whole pathological area using such an algorithm that does not require a human intervention. For the good visibility of these kinds of tissues both T2-weighted and FLAIR images were used. The proposed method was tested on 80 MR volumes of publicly available BRATS database, which contains high and low grade gliomas, both real and simulated. The performance was evaluated by the Dice coefficient, where the results were differentiated between high and low grade and real and simulated gliomas. The method reached promising results for all of the combinations of images: real high grade (0.73 ± 0.20), real low grade (0.81 ± 0.06), simulated high grade (0.81 ± 0.14), and simulated low grade (0.81 ± 0.04)

Automatická extrakce patologické oblasti pomocí 3D T2 a FLAIR MR snímků

This work deals with fully automated extraction of brain tumor and edema in 3D MR volumes. The goal of this work is the extraction of the whole pathological area using such an algorithm that does not require a human intervention. For the good visibility of these kinds of tissues both T2-weighted and FLAIR images were used. The proposed method was tested on 80 MR volumes of publicly available BRATS database, which contains high and low grade gliomas, both real and simulated. The performance was evaluated by Dice coefficient, where the results were differentiated between high and low grade and real and simulated gliomas. The method reached promising results for all of the combination of images: real high grade (0.73), real low grade (0.81), simulated high grade (0.81), simulated low grade (0.81).Tato práce se zabývá plně automatickou extrakci mozkového nádoru a edému 3D MR obrazů. Cílem práce je extrakce celé patologické oblasti s použitím takového algoritmu, který nevyžaduje zásah člověka. Pro extrakci byly zvoleny T2 a FLAIR obrazy pro dobrou viditelnost těchto druhů tkání. Navržená metoda byla testována na 80 MR obrazech veřejně dostupné BRATS databáze, která obsahuje reálné i simulované obrazy pacientů s gliomem v různých staádiích. Výsledky byly hodnoceny pomocí Diceova koeficientu, kde byly diferencované výsledky mezi vysokým a nízkým stupněm a reálných a simulovaných gliomů. Tato metoda dosáhla slibné výsledky pro všechny kombinace obrázů: reálné gliomy vysokého stupně (0,73), reálné gliomy nízkého stupně (0,81), simulované gliomy vysokého stupně (0,81), simulované gliomy nízkého stupně (0,81)

Identifikace bakteriálních paternů v infračerveném spektru

Abstract. Microorganism identification, primary bacterial identification and pathogen detection, is important in a lot of microbial scientific areas (diagnosing of infection diseases, food protection). In this, the identification of the strains was performed by near infrared spectroscopy (wavelength from 900 nm to 2500 nm). Different techniques for classification (CVA,ANN…) were examined. It was reached to 100% accuracy on limited count of samples. Near Infrared (NIR) spectroscopy seems to be as suitable method for rapid bacteria identification. It can be used in a wide variety of food protection, medicine microbiology, bio-terrorism threats and environmental studies.Je rozebrána identifikace bak. kmenů pomocí blízké infračervené spektroskopie (vlnová délka od 900 nm do 2500 nm). Byly zkoumány různé techniky pro klasifikaci (CVA, ANN ...). Bylo dosaženo přesnosti 100% na omezeném počet vzorků. Metoda může být použita v širokém spektru ochrany potravin, farmacie, mikrobiologie a ekologie

Experimental Measurement of Nanolayers via Electromagnetic, Near Infrared, and Gamma Radiation

We discuss and compare the results obtained from experimental measurements of a two-layer, Ni and TiO2 nanometric structure deposited on siliceous glass. Utilizing previous theoretical models of multilayers or periodic systems and their verifications, the paper focuses on measurement in the NIR, visible, UV, X-ray, and gamma bands of the electromagnetic spectrum; the wavelength of the incident electromagnetic wave is respected. The proposed evaluation comprises a brief description of a Snell's law-based semi-analytic model of electromagnetic wave propagation through a layered material. We also demonstrate the expected anti-reflective and shielding effects in the X-ray and gamma-ray bands, respectively