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The contribution describe cultivation process of Zea mays. The effect of soil and biochar on plant growth is discussed.

Farey sequences, introduced by such renowned mathematicians as John Farey, Charles Haros, and Augustin-L. Cauchy over 200 years ago, are quite well- known by today in theory of fractions, but its computational perspectives are pos- sibly not yet explored up to its merit. In this paper, we present some novel theoret- ical results and e cient algorithms for representation of a Farey sequence through a Farey table. The ranks of the fractions in a Farey sequence are stored in the Farey table to provide an e cient solution to the rank problem, thereby aiding in and speeding up any application frequently requiring fraction ranks for computational speed-up. As the size of the Farey sequence grows quadratically with its order, the Farey table becomes inadvertently large, which calls for its (lossy) compression up to a permissible error. We have, therefore, proposed two compression schemes to obtain a compressed Farey table (CFT). The necessary analysis has been done in detail to derive the error bound in a CFT. As the nal step towards space opti- mization, we have also shown how a CFT can be stored in a 1-dimensional array. Experimental results have been furnished to demonstrate the characteristics and e ciency of a Farey table and its compressed form.

This Special Section in IEEE ACCESS aimed to arise the interest of the scientific community and to attract original research to advance the state of the art in behavioral biometrics for e-health and well-being. It is an opportunity to gain a significantly better understanding of the field’s current developments and future direction.

30 June 1937 is the birthday of Professor Ladislav Skula, our colleague at the Institute of Mathematics of the BUT Faculty of Mechanical Engineering, a distinguished editorial board member of this journal, and an outstanding Brno mathematician of world renown.

This paper reports results of analysis of field ion emission mechanism from tungstenepoxy composite emitters that are compared to tungsten nanofield emitters. In this context, the mechanism of emission from this type of emitters is described based on a theory of induced conductive channels. The tungsten emitters were prepared using the electrochemical polishing technique and coated with a layer of the epoxy resin. Field ion microscope (FIM) analyses are reported including the study of the emissionion density distributions from both the uncoated and coated emitters. Two forms of emission patterns have been observed in the ion emission microscopy technique describing the differences in the emission mechanism of both types of emitters. The observed results show: (a) the expected crystalline surface atomic distribution images of the field ion microscopy in the case of uncoated tungsten tips, and (b) randomly distributed emission spots that describe the locations of the induced conductive channels inside the resin coating layer.

The decelerated swirling flow often breaks down into helical structure which is unstable and causes unsteady velocity and pressure fields. The numerical and experimental investigation of this flow pattern is carried out on the experimental apparatus consisting of the swirl generator (source of strong swirling flow) and the conical diffuser (equipped with the series of pressure transducers). The experimental measurements are focused on complex pressure measurements in order to distinguish between synchronous and asynchronous pulsations induced by the vortex structure and examine their changes in relation to the flow rate. The numerical simulations are carried out to visualize vortex shape and compare computed pressure fields with the experimental ones. The open source CFD software OpenFOAM employing realizable k- turbulence model is used for the numerical simulations. Agreements between numerical end experimental results are discussed. Vířivé proudění se často rozpadne do spirální vírové struktůry, která je nestabilní a způsobuje nestacionární rychlostní a tlakové pole. Byl proveden numerický a expeimentální výzkum tohoto jevu s využitím experimentálního zařízení - vírového generátoru (zdroj silného zavíření) a kónického difuzoru (osazeného tlakovými snímačemi). Experimentální měření je zaměřeno na rozklad tlakových pulzací do synchroních a asynchroních složek a jejich změnu se zvyšujícícm se průtokem. S využitím numerické simulace je provedena vizualizace tvaru vírové struktůry a porovnání spočteného tlakového pole s experimentálním měřením. Pro numerický výpočet byl využit open-source CFD software OpenFOAM s k- modelem turbulence. Závěrem byla sledována shoda experimentu s numerickým výpočtem.

Low complexity and high speed are the key requirements of the digital filters. These filters can be realized using allpass filters. In this paper, design and minimum multiplier implementation of a fixed point lattice wave digital filter (WDF) based on three port parallel adaptor allpass structure is proposed. Here, the second-order allpass sections are implemented with three port parallel adaptor allpass structures. A design-level area optimization is done by converting constant multipliers into shifts and adds using canonical signed digit (CSD) techniques. The proposed implementation reduces the latency of the critical loop by reducing the number of components (adders and multipliers). Three design examples are included to analyze the effectiveness of the proposed approach. These are implemented in verilog HDL language and mapped to a standard cell library in a 0.18 μm CMOS process. The functionality of the implementations have been verified by applying number of different input vectors. Results and simulations demonstrate that the proposed design method leads to an efficient lattice WDF in terms of maximum sampling frequency. The cost to pay is small area overhead. The postlayout simulations have been done by HSPICE with CMOS transistors.

The Central Library at Brno University of Technology (BUT) has a wide range of information literacy courses, workshops and instructions for students and academic staff. In the last three years PhD. students have become the main focus of the library educational activities. Besides e-learning courses about scientific publishing we prepared a blended-learning course about different aspect of citations, referencing and publication ethics. The course also focuses on electronic information resources, critical thinking and Open Access. These topics are really important for the students, but they do not feel competent enough. As most of the PhD. students at BUT lead seminars for undergraduate students, the aim of the course is not just to equip the PhD. students with the necessary knowledge, but they should also learn how to explain these topics to their own students. The study materials are provided in Moodle e-learning system where there are discussion forums, tests and tasks readily available for the students all the time. In the face-to-face lectures we use different creative techniques of teaching and working with information. Students learn the subject not just by reading the study materials, but also through actively engaging in different games and tasks. The relaxed atmosphere also helps students to discuss and question what they have learned and fix their knowledge. For evaluation of the impact of the course and students satisfaction we used few different methods – pre-testing and post-testing, evaluation questionnaire, artefacts analysis and focus group. Those tools helped us to identify the gaps in the knowledge, the topics that should be covered in lectures for PhD. students and teaching techniques that are effective. Students generally find the course beneficial for both their publishing and teaching experience and indicate that they have already used some of the knowledge and teaching techniques in their own teaching. They appreciate good communication within the course, informal atmosphere and the inclusion of creative techniques and game elements into learning. Many have explicitly expressed that the lessons were form of relaxation for them, but also associated with the transmission of quality educational content. They considered meeting face to face associated with e-learning support as a convenient way of learning. They judged the e-learning part as exceptionally good, but personal contact is also important for them. In the best practice presentation we aim to share our experiences with teaching information literacy topics using non-formal activities and present the information we received from the evaluation methods we used.

In 1939, due to WWII and the Nuremberg Laws, the revolutionary Czech structural engineer Jaroslav J. Polívka arrived in the United States. After his arrival, he started a research job at UC Berkeley, renewed his engineering practice, and offered his services to the US military as many businesspersons did during this era. Polívka worked for Henry Kaiser who turned Richmond, CA, into a vibrant, fast developing workers city. New residential districts, hospitals, hangars, docks, and warehouses were built there. Henry Kaiser approached the structural development of the city in the same way he revolutionized the construction of battleships: from prefabricated, standardized parts. He supported research and development of new technologies. Mobile, round-shaped hospitals from prefabricated aluminum frames were one of the results of that research. In 1946, Jaroslav J. Polívka introduced himself to the “starchitect” Frank Lloyd Wright. A productive mutual co-operation that lasted 13 years and resulted in eight spectacular projects had started and Polívka, who had been working on extensive research both at UC Berkeley and Stanford University, came up with many technological, structural, and material innovations over the period. In 1957, Henry Kaiser funded the construction of one of the two geodesic domes designed by Richard Buckminster Fuller in Hawaii and in the process he invited Frank Lloyd Wright to consult the project. Jaroslav J. Polívka was probably in direct contact with Fuller, since he wanted to include him in his unfinished project of an encyclopedia of the world-famous structural engineers. On this particular story and a social matrix evolving around Henry Kaiser and Frank Lloyd Wright, the lecture seeks to rethink architectural global modernism as a cooperative project rather than a series of individual innovations manifested by isolated genius figures.

In this paper, we extend a newly introduced concept called the jumping nite automata for accepting string languages to two-dimensional jumping nite automata for accepting two-dimensional languages. We discuss some of the basic properties of these automata and compare the family of languages accepted by these automata with the family of Siromoney matrix languages and also recognizable picture languages (REC). We also discuss some of the closure properties of these automata along with some of their decidability properties.