All-Pole Recursive Digital Filters Design Based on Ultraspherical Polynomials

A simple method for approximation of all-pole recursive digital filters, directly in digital domain, is described. Transfer function of these filters, referred to as Ultraspherical filters, is controlled by order of the Ultraspherical polynomial, nu. Parameter nu, restricted to be a nonnegative real number (nu ≥ 0), controls ripple peaks in the passband of the magnitude response and enables a trade-off between the passband loss and the group delay response of the resulting filter. Chebyshev filters of the first and of the second kind, and also Legendre and Butterworth filters are shown to be special cases of these allpole recursive digital filters. Closed form equations for the computation of the filter coefficients are provided. The design technique is illustrated with examples

THE COURSE OF THE JUDO FIGHT AT THE 2011 WORLD CHAMPIONSHIP

The aim of the study was to investigate the course of the judo fight in different weight categories at the 2011 Senior World Championship held in Paris. The sample consisted of 140 fights in the men's competition from the World Championship held in 2011 in Paris. From each of the seven weight categories, twenty of the most important matches were analyzed. The categories included light (-60kg and -66kg), middle (-73kg, -81kg and -90kg) and heavy (-100kg and +100kg). A total of 959 situations were observed. The following variables were analyzed: actions, group of the applied nage waza and kumikata stance. There were statistical differences (p≤0.05) between the different weight categories in all the analyzed parameters. The results have shown that judokas need to conduct a great number of attack attempts in order to score (65.38% of all the actions were unsuccessful throw attempts). They preferred te waza (35.87%) and ashi waza (34.82) techniques from the kenka yotsu (37.94%) and ai yotsu (24.11%) gripping stance. As coaching advice, the number of training situations that favor attacking from thekenka and ai yotsu stance and defending from ashi and te waza attacks should be increased

Native Non-Saccharomyces Yeasts as a Tool to Produce Distinctive and Diverse Tamjanika Grape Wines

The enological potential of two previously characterized indigenous yeast isolates, Hanseniaspora uvarum S-2 and Candida famata WB-1, in pure and sequential inoculation with commercial yeast Saccharomyces cerevisiae QA23 were analyzed in industrial-scale vinification of the grape variety Tamjanika. Their contribution to the quality and aroma profile was investigated by quantifying volatile compounds and wine sensory evaluation. Both yeast isolates were able to complete alcoholic fermentation, to reduce ethanol concentration up to 1.06% v/v (in monoculture) in comparation to S. cerevisiae QA23, and to enhance aroma and sensory profile. Based on calculated odor activity values (OAV), p-cymene, ethyl hexanoate, ethyl octanoate, and ethyl decanoate were the major aroma volatile compounds in all Tamjanika wine samples. Analyzed yeast strains significantly affected relative contribution of volatile compounds and can be considered responsible for the differences and uniqueness of the obtained wine samples. Besides confirmation of good enological and fermentative characteristics, selected isolates can be characterized as high ester-producing strains with potential to enhance the floral and fruity aromas of wine. The present study represents a further step toward the use of indigenous yeast isolates at industrial-scale fermentation in order to ensure the regional signature of Tamjanika wine

Sadržaj pigmenata hloroplasta u lekovitoj biljci Teucrium chamaedrys sa sanirane deponije Rudarsko metalurško hemijskog kombinata “Trepča”

In this paper, the contents of chloroplast pigments (chlorophyll a, b, a+b and carotenoids) in the leaves of medicinal plant Teucrium chamaedrys from tailing pond „Žitkovac“ of Mining and Metallurgical Chemical Company „Trepča“ and from uncontaminated area near city of Niš were compared. Chloroplast pigments were determined spectrophotometrically in the acetone extracts of experimental and control samples of plant material. The contents of chlorophyll a, a+b and ratio a/b were higher in leaves of samples from tailing pond in comparison with control samples from uncontaminated habitat near city of Niš. In response to stress conditions caused by pollution and full intensity of sunlight in samples of leaves from tailing pond providing the protection of chlorophyll from photooxidation or ultraviolet radiation damage.U ovom radu upoređen je sadržaj pigmenata hloroplasta (hlorofil a, b, a+b, karotenoidi) iz listova lekovite bilјne vrste podubica - Teucrium chamaedrys sa deponije „Žitkovac“ Rudarsko Metalurško Hemijskog Kombinata „Trepča“ i nezagađenog područja okoline Niša. Pigmenti hloroplasta su određeni spektrofotometrijski u acetonskim ekstraktima eksperimentalnih i kontrolnih uzoraka bilјaka. Sadržaj hlorofila a, a+b i odnos a/b je bio veći kod u uzorcima listova sa deponije u poređenju sa kontrolnim uzorcima sa nezagađenog staništa iz okoline Niša. Kao odgovor na stresne uslove uzrokovane zagađenjem i punim intenzitetom sunčeve svetlosti zabeležen je i povećan sadržaj karotenoida kod uzoraka listova sa deponije, što obezbeđuje zaštitu hlorofila od fotooksidacije odnosno štetnog dejstva ultravioletnog zračenja

Cardiopoietic cell therapy for advanced ischemic heart failure: results at 39 weeks of the prospective, randomized, double blind, sham-controlled CHART-1 clinical trial

Cardiopoietic cells, produced through cardiogenic conditioning of patients' mesenchymal stem cells, have shown preliminary efficacy. The Congestive Heart Failure Cardiopoietic Regenerative Therapy (CHART-1) trial aimed to validate cardiopoiesis-based biotherapy in a larger heart failure cohort

LOWPASS FILTERS APPROXIMATION BASED ON THE ORTHOGONAL JACOBI POLYNOMIAL

A case study related to the design the the analog lowpass filter using a set of orthogonal Jacobi polynomials, having four parameters to vary, is considered. The Jacobi polynomial has been modified in order to be used as a filter approximating function. The obtained magnitude response is more general than the response of the classical ultraspherical filter, due to one additional parameter available in orthogonal Jacobi polynomials. This additional parameter may be used to obtain a magnitude response having either smaller passband ripple, smaller group delay variation or sharper cutoff slope. Two methods for transfer function approximation are investigated: the first method is based on the known shifted Jacobi polynomial, and the second method is based on the proposed modification of Jacobi polynomials. The shifted Jacobi polynomials are suitable only for odd degree transfer function. However, the proposed modified Jacobi polynomial filter function is more general. It includes the Chebyshev filter of the first kind, the Chebyshev filter of the second kind, the Legendre filter, Gegenbauer (ultraspherical) filter and many other filters, as its special cases

Hydrogen desorption from nanostructured magnesium hydride composites

The influence of 3d transition metal addition (Fe, Co and Ni) on the desorption properties of magnesium hydride were studied. The ball milling of MgH2-3d metal blends was performed under Ar. Microstructural and morphological characterization were performed by XRD and SEM analysis, while the hydrogen desorption properties were investigated by DSC. The results show a strong correlation between the morphology and thermal stability of the composites. The complex desorption behavior (the existence of more than one desorption peak) was correlated with the dispersion of the metal additive particles that appear to play the main role in the desorption. The desorption temperature can be reduced by more than 100 degrees if Fe is added as additive. The, activation energy for H-2 desorption from the MgH2-Fe composite is 120 kJ/mol, implying that diffusion controls the dehydration process.5th Young Researchers Seminar, Dec 25-26, 2006, Belgrade, Serbi

Neuro-fuzzy techniques and Natural Risk Management. Applications of ANFIS models in floods and comparison with other models

Summarization: During the last decades, floods are getting more and more dangerous and they cause a lot of destruction either for human lives and/or for people’s properties. Due to different climate conditions, some parts of the world present increased levels of danger from floods. For this reason, the development of a robust tool for the prediction of floods is essential for the protection of people who live in these areas. An adaptive neuro-fuzzy inference system is a hybrid fuzzy system, which is based on Sugeno fuzzy inference along with the use of artificial neural networks for training. In this work, the current literature on adaptive neuro-fuzzy inference system models, which are used for flood prediction, is reviewed. More specifically, the mode of operation of such decision-making systems, along with their major advantages and disadvantages are presented in detail. A comparison with other similar models is also carried out.Appearing in: Natural Risk Management and Engineering: NatRisk Projec