Verification Methodology of Fade Characteristics in a DAB+ SFN in Wroclaw

The article presents the methodology for measuringverification of the phenomenon of fades in the DAB+ SFN. Theverification is related to comparing the characteristics of the fadesdetermined theoretically with the occurring fades in the realenvironment of a large city. The conditions favorable for theoccurrence of fading are presented and by selecting theappropriate propagation analysis tool, the places where theoccurrence of fading is most likely were selected. In these places ananalysis of the characteristics of fades was carried out and theconditions for their verification were determined

Automated diagnostic systems

With the extremely advanced and complex design of modern vehicles, their high power and torque, it is necessary to employ advanced diagnostic systems. Quick detection and diagnosis of all defects will protect the vehicle against more serious failures, and will prevent excessive fuel consumption and harmful emissions, as well as prevent the reduction of the efficiency and functionality of vehicles. The mechatronic vehicle diagnostic system must include the diagnostic modules for the following components: engine, powertrain, steering, brake system, suspension and electrical equipment. The study discusses the hardware and software components of the mechatronic vehicle diagnostic system, and presents the sample sensors installed in the vehicle to monitor the parameters of components included in the diagnostic system. The vehicle diagnostics system has been presented using the example of diagnostics of wheeled tractors. For this purpose, two alternative diagnostic devices have been developed: a prototype MSDC-1 device, and a production version of the MSDC-2 device. Following a minor adaptation, both devices can be used in the diagnostics of other wheeled vehicles powered by I.C. engine. In further paragraphs of the study, some of the field tests performed on the diagnostic units are discussed. The study also presents some of the test results in the form of diagrams of changes in the temperature of specific engine components. In the diagrams illustrating the results of the tests, the changes of specific operating parameters of the wheeled tractor over time during tests of the MSDC-1 and MSDC-2 units can be observed. The devices differ significantly in terms of design, but they share a purpose, namely online diagnostics of vehicle condition

The Relationship between 200 m Performance and Selected Anthropometric Variables and Motor Abilities in Male Sprinters

The goal of this study was the investigation of the relationship between 200 m performance and motor abilities and anthropometric characteristics of different level of male sprinters (200 m performance 23.80±2.16 s – the best results 21.40 s). The physical fi tness measures included: 50 m from standing and fl ying start, standing long jump (SLJ) standing fi ve jump (SFJ), double and single leg countermovement jumps CMJ), fl exibility (sit and reach) and 4 kg shot put throwing (over head). The Spearman correlation coeffi cient was applied to verify the association. The results demonstrated strong relationships (p < 0.05) between 200 m performance and experience (age) and body mass (r=0.85, r=–0.80 respectively.) As for the motor abilities strong relationship exists between 200 m and time of 150 m, 50 m from standing and fl ying start and CMJ on single leg. Vertical jumping displayed stronger relationship with 200 m performance that horizontal one. From a practical point of view this is very important notice

The Relationship between Selected Motor Ability Determinants and Anthropometric Characteristics in Adolescent Athletes from Various Sport

The main purpose of this study was to examine the relationship between speed, lower extremities explosive power, simple, and complex responses in adolescent athletes from various disciplines. Thirty nine athletes of 16.5 years old, N=13 sprinters and jumpers, N=13 soccer players, and N=13 judokas participated in the experiment. Pearson correlations, a one–way ANOVA and an independent t-test for establishing differences between those three groups of athletes was applied. Additionally the Ward method of hierarchical cluster analysis also was applied. The strong correlation occurred between complex responses and speed; 20 m from standing and 20 m fl ying start (r=0.62 and r=0.65 respectively). In other cases, no strong association was found. The substantial differences between groups occurred in the 20 m run from fl ying start (t=5.92) and standing triple jump (t=4.16). The study indicates that adolescent athletes may need to be assessed differently to a certain extent, including sport specialization

Wybrane czynniki demograficzno-społeczne a skuteczność edukacji zdrowotnej prowadzonej na podstawie broszur edukacyjnych u osób z ostrym zawałem serca

Wstęp: Celem pracy była ocena wpływu wybranych czynników demograficzno-społecznych na skuteczność edukacji zdrowotnej prowadzonej na podstawie broszur edukacyjnych u osób z ostrym zawałem serca. Metody: Badaną grupę stanowiło 146 pacjentów leczonych metodą angioplastyki wieńcowej z powodu ostrego zawału serca. Badanie przeprowadzono na podstawie kwestionariusza obejmującego pytania oceniające wiedzę dotyczącą choroby wieńcowej. Ten sam kwestionariusz wypełniano w drugiej oraz w ostatniej dobie hospitalizacji. Odpowiedzi na wszystkie pytania zawarte w kwestionariuszu znajdowały się w broszurze, którą chory otrzymywał w drugiej dobie po wypełnieniu kwestionariusza. Wyniki: Zastosowanie prostego narzędzia edukacyjnego, jakim jest broszura, przyniosło wymierne, chociaż ograniczone efekty, u osób hospitalizowanych z powodu zawału serca. Młodszy wiek, wyższy poziom wykształcenia, praca zawodowa i zamieszkiwanie w dużym mieście były czynnikami zwiększającymi skuteczność edukacji zdrowotnej prowadzonej na podstawie broszury. Natomiast płeć badanych nie wpływała wyraźnie na wiedzę pacjentów na początku hospitalizacji ani na skuteczność interwencji edukacyjnej. Wnioski: Uwarunkowania społeczne i wiek pacjentów z ostrym zawałem serca mają istotny wpływ na skuteczność edukacji zdrowotnej prowadzonej w tej grupie chorych

Inhibitors of sodium-glucose transport protein 2: A new multidirectional therapeutic option for heart failure patients

Several mechanisms have been suggested to explain positive cardiovascular effects observed in studies with sodium-glucose co-transporter 2 (SGLT2) inhibitors. The reduction in glucose reabsorption in proximal tubuli induced by SGLT2 inhibitors increases urinary glucose and sodium excretion resulting in increased osmotic diuresis and consequently in decreased plasma volume, followed by reduced preload. In addition, the hemodynamic effects of SGLT2 inhibition were observed in both hyper and euglycemic patients. Due to the complex and multidirectional effects induced by SGLT2 inhibitors, this originally antidiabetic group of drugs has been successfully used to treat patients with heart failure as well as for subjects with chronic kidney disease. Moreover, their therapeutic potential seems to be even broader than the indications studied to date

4C Mortality Score correlates with in-hospital functional outcome after COVID-19-associated ischaemic stroke

Aim of the study. The 4C Mortality Score was created to predict mortality in hospitalised patients with COVID-19 and has to date been evaluated only in respiratory system disorders. The aim of this study was to investigate its application in patients with COVID-19-associated acute ischaemic stroke (AIS).Clinical rationale for study. COVID-19 is a risk factor for AIS. COVID-19-associated AIS results in higher mortality and worse functional outcome. Predictors of functional outcome in COVID-19-associated AIS are required.Materials and methods. This was a retrospective observational study of patients with AIS hospitalised in seven neurological wards in Małopolska Voivodship (Poland) between August and December 2020. We gathered data concerning the patients’ age, sex, presence of cardiovascular risk factors, type of treatment received, and the presence of stroke-associated infections (including pneumonia, urinary tract infection and infection of unknown source). We calculated 4C Mortality Score at stroke onset, and investigated whether there was a correlation with neurological deficit measured using the National Health Institute Stroke Scale (NIHSS) and functional outcome assessed using the modified Rankin Scale (mRS) at discharge.Results. The study included 52 patients with COVID-19-associated AIS. The 4C Mortality Score at stroke onset correlated with mRS (rs = 0.565, p &lt; 0.01) at discharge. There was also a statistically significant difference in the mean 4C Mortality Score between patients who died and patients who survived the stroke (13.08 ± 2.71 vs. 9.85 ± 3.47, p = 0.04).Conclusions and clinical implications. 4C Mortality Score predicts functional outcome at discharge in COVID-19-associated AIS patients

LEARNING AND COGNITION

This presentation consists of three interrelated parts

Generating Alternative Hypotheses in AQ Learning

In many areas of application of machine learning and data mining, it is desirable to generate alternative inductive hypotheses from the given data. The A q-ALT or, briefly, ALT method, presented in this paper, generates alternative hypotheses in two phases. The first phase proceeds according to the standard A q algorithm, but each star generation process produces not just one best complex, but rather a collection of complexes, called the elite. This phase ends when the union of best complexes constitutes a complete and consistent cover of the target set, called the primary hypothesis. The second phase derives alternative hypotheses by multiplying out the disjunctions of symbols representing complexes in each elite, and creating an irredundant DNF expression. Individual terms in this expression determine alternative hypotheses. These hypotheses are ranked according to a given hypothesis evaluation criterion, LEFh, and the alt best hypotheses are selected, where alt is a parameter provided to the program. The method is extended to inconsistent covering problem by introducing an event membership probability function. The selected hypotheses can be used as alternative generalizations of data, or arranged into an ensemble of classifiers to perform a form of boosting. The ALT method is general, and can thus be employed not onl