Rendering Reverberations in Ambisonic and Surround Audio

Traditional approaches for rendering room reverberations for spatial audio inputs typically use large numbers of convolutions for higher order ambisonics, requiring a significant computation effort. This disclosure describes techniques to efficiently render room reverberations for ambisonic and surround audio inputs, enabling scene-based spatial audio rendering for ambisonic and surround audio in devices such as headsets, earphones, augmented reality (AR) glasses, etc. Dry (unprocessed) surround audio, ambisonic audio, or object-based surround sound input is processed to generate early reflections and late reverberations. The direct path, the early reflections, and the late reverberations are combined such that a listener using a headset can perceive immersive and stereophonic spatial audio

Efficient externalized audio reverberation with smooth transitioning

Audio for immersive or simulated environments such as virtual reality (VR) matches the acoustics of the environment being simulated. Reverberative effects of a simulated environment are reproduced in a manner consistent with a corresponding real-world environment. For example, in a VR game, a user moves between a cathedral and a small room which are virtual environments that have substantially different acoustics. Providing audio reverb that matches a current virtual environment and smoothly transitions between virtual environments is essential for a quality VR experience. Providing smooth audio requires implementing a change in reverberation settings, e.g., filters, synchronously with gameplay which imposes a large computational load. This disclosure describes techniques to provide realistic audio reverberation with smooth transitions between simulated environments and low computational load. The techniques present different reverberation at each ear and position sound sources external to the user

Access to public sports infrastructure in Poland as a preventive factor for cardiovascular diseases

Introduction: Cardiovascular diseases (CVDs) are a significant health concern globally, including in Poland. Physical activity has been identified as a crucial preventive factor for CVDs, and access to public sports infrastructure plays a vital role in promoting physical activity. However, the relationship between access to such infrastructure and its impact on cardiovascular health outcomes in Poland remains understudied. Aim of the study: This study aims to investigate the impact of access to public sports infrastructure on the prevalence of cardiovascular diseases and mortality rates in Poland. Materials and methods: Publicly available data were obtained regarding sports facilities, population structure, hospitalizations, and deaths. Results: There is a moderate negative correlation (r = -0.3096; p < 0.001) between hospitalization rates for cardiovascular diseases and the stadiums and playing fields available in the studied countries. The correlation between cardiovascular hospitalizations and indoor and outdoor arenas and gyms was also negative, but its effect was moderately weak (r = -0.2068, p < 0.001; r = -0.2597, p < 0.001, respectively). The average hospitalization rate for cardiovascular diseases in subjects over 65 years of age (M = 12117.24) was significantly higher compared to the group of all subjects (M = 3082.18) and subjects under 65 years of age (M = 1260.96). There is a negative correlation between the death rate and the availability of selected sports facilities, with a moderately weak effect for all sports infrastructure subgroups (r = -0.215 - -0.233). Conclusion: The effect of accessibility to public sport infrastructure on CVDs prevalence and related deaths is moderate to weak. The studied positive effect particularly affects people under 65 years of age. Further studies of other sport-connected predictors may be beneficial

Breast cancer screening programmes in selected European countries and Poland

Breast neoplasms are the most common malignant tumors among women. In recent years breast cancer incidence rate has increased. Due to this fact the European Union presents evidence-based guidelines on breast cancer screening and diagnosis. Recommended and commonly used screening test is mammography. The effectiveness of prophylaxis is measured by a decrease in breast cancer mortality rate. Detailed recommendations in EU member countries differ from those presented by the EU institutions. This paper compares the screening programme in Poland to screening programmes in other EU members. The evaluation considers compliance with European screening guidelines and changes in mortality rates since the introduction of the screening programs. General guidelines in Poland are close to European ones. However, some Polish health centers still use analog mammography instead of recommended digital mammography. Furthermore, mortality rate changes in Poland maintain on a constant level due to women’s reluctant participation in screening tests

Ciliated protozoa in the impact zone of the Uzhgorod treatment plant

This paper presents the results of studies on the Uzh River (Ukraine, Zakarpattia Oblast) near the effluent point of a sewage treatment plant in Uzhgorod. The samples were taken at various sites of the treatment plant along the stages of purification process, as well as in the river, at a number of different points above and below the wastewater discharge. At each of these objects, the temperature and O2 were measured. The structure of ciliate assemblage was analyzed along the stages of the treatment process in the WWTP and in the river before and after the sewage discharge. A total of 26 ciliate taxa were observed and included in the analysis. All the studied stations were considered as a continuum in which populations of protozoa spread freely according to their ecological preferences. The majority of ciliate species were encountered in each of the examined stations, but their quantitative development differed significantly, reflecting their response to the environmental conditions at the stations. The analysis of the qualitative and quantitative distribution of ciliate populations by the stations enabled to group them in respect to the peculiarities of the local conditions. The study showed that the majority of the ciliate species, typical of bioreactors, are equally common at the stations of the Uzh River below wastewater discharges. The ciliate assemblage in the oxygen gradient demonstrated a wide spectrum of ecological tolerance at the species level. These findings confirm that ciliates are very good indicators of the environmental quality, provided that detailed information about their environmental priorities is available

Particulate matter – a cancerous threat to our health?

Introduction: Particulate matter (PM) as a part of outdoor air pollutants are classified as human carcinogens. They are formed majorly as a result of combustion process by industry, power plants and engines. PM can be divided by the size of their particles into PM2.5 and PM10, where PM2.5 are small enough to penetrate into the alveoli sacs in the lung reaching the bloodstream, whereas PM10 affect mostly oral cavity, nose and the throat. Aim of the study: This study aims to investigate the impact of PM2.5 and PM10 particle concentrations in the EU NUTS 2 subregions on the death rates due to the most common malignant neoplasms. Results: There is a positive moderate correlation (r = 0.421; p < 0.001) between the annual mean concentration of PM2.5 and deaths due to malignant tumors. The strongest correlation was observed for malignant neoplasms of larynx, which is a positive correlation with a strong effect (r = 0.641; p < 0.001); and malignant neoplasm of bladder (r = 0.523; p < 0.001). For PM10, there is a moderately weak positive correlation (r = 0,195; p = 0.008) between the annual average concentration of PM10 and deaths due to malignant tumors. The strongest correlation was observed for malignant neoplasms of larynx, which is a positive correlation with a strong effect (r = 0,551; p < 0.001). Conclusion: The effect of PM impact on the malignant neoplasms is strong to moderate. The most affected neoplasm site are the ones the PMs intake occurs, being in the respiratory system. However other sites, where PMs can accumulate can be impacted as well. Further studies about the population with the highest risk due to the PMs exposure may be beneficial as other non-air quality-connected predictors may be found

Access to public sports infrastructure in Poland as a preventive factor for cardiovascular diseases

Introduction: Cardiovascular diseases (CVDs) are a significant health concern globally, including in Poland. Physical activity has been identified as a crucial preventive factor for CVDs, and access to public sports infrastructure plays a vital role in promoting physical activity. However, the relationship between access to such infrastructure and its impact on cardiovascular health outcomes in Poland remains understudied. Aim of the study: This study aims to investigate the impact of access to public sports infrastructure on the prevalence of cardiovascular diseases and mortality rates in Poland. Materials and methods: Publicly available data were obtained regarding sports facilities, population structure, hospitalizations, and deaths. Results: There is a moderate negative correlation (r = -0.3096; p < 0.001) between hospitalization rates for cardiovascular diseases and the stadiums and playing fields available in the studied countries. The correlation between cardiovascular hospitalizations and indoor and outdoor arenas and gyms was also negative, but its effect was moderately weak (r = -0.2068, p < 0.001; r = -0.2597, p < 0.001, respectively). The average hospitalization rate for cardiovascular diseases in subjects over 65 years of age (M = 12117.24) was significantly higher compared to the group of all subjects (M = 3082.18) and subjects under 65 years of age (M = 1260.96). There is a negative correlation between the death rate and the availability of selected sports facilities, with a moderately weak effect for all sports infrastructure subgroups (r = -0.215 - -0.233). Conclusion: The effect of accessibility to public sport infrastructure on CVDs prevalence and related deaths is moderate to weak. The studied positive effect particularly affects people under 65 years of age. Further studies of other sport-connected predictors may be beneficial

Test Modeling of Dynamic Variable Systems using Feature Petri Nets

In order to generate substantial market impact, mobile applications must be able to run on multiple platforms. Hence, software engineers face a multitude of technologies and system versions resulting in static variability. Furthermore, due to the dependence on sensors and connectivity, mobile software has to adapt its behavior accordingly at runtime resulting in dynamic variability. However, software engineers need to assure quality of a mobile application even with this large amount of variability—in our approach by the use of model-based testing (i.e., the generation of test cases from models). Recent concepts of test metamodels cannot efficiently handle dynamic variability. To overcome this problem, we propose a process for creating black-box test models based on dynamic feature Petri nets, which allow the description of configuration-dependent behavior and reconfiguration. We use feature models to define variability in the system under test. Furthermore, we illustrate our approach by introducing an example translator application

Assessment of the Al–Fe–Ti system

The Al–Fe–Ti system has been assessed and the limiting binary systems are shortly reviewed. Based on a thorough review of the literature, isotherms at 800, 900, and 1000 °C have been re-evaluated and a provisional isotherm at 1200 °C is presented for the first time. The effect of alloying the binary phases with the third component is reviewed with regard to the ternary homogeneity ranges, crystallography, order/disorder transformations, and site occupancies. Of the variously reported ternary compounds only the existence of “Al2FeTi” (τ2) and “Al8FeTi3” (τ3) is confirmed. The occurrence of the phases τ2*, τ′2, and of a new stacking variant of TiAl is still under discussion, while the existence of the phases Fe2AlTi (τ1) and Fe25Al69Ti6 (X) is ruled out. The presented reaction scheme corroborates the isothermal sections and also a representation of the liquidus surface is given. Magnetic, electrical, thermochemical, atomistic and diffusion data for Al–Fe–Ti alloys are summarised and an overview about studies on modelling of phase equilibria and phase transformations is given

Effect of stress level on the high temperature deformation and fracture mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB²: an 'In Situ' experimental study

The effect of the applied stress on the deformation and crack nucleation and propagation mechanisms of a gamma-TiAl intermetallic alloy (Ti-45Al-2Nb-2Mn (at. pct)-0.8 vol. pct TiB2) was examined by means of in situ tensile (constant strain rate) and tensile-creep (constant load) experiments performed at 973 K (700 °C) using a scanning electron microscope. Colony boundary cracking developed during the secondary stage in creep tests at 300 and 400 MPa and during the tertiary stage of the creep tests performed at higher stresses. Colony boundary cracking was also observed in the constant strain rate tensile test. Interlamellar ledges were only found during the tensile-creep tests at high stresses (sigma > 400 MPa) and during the constant strain rate tensile test. Quantitative measurements of the nature of the crack propagation path along secondary cracks and along the primary crack indicated that colony boundaries were preferential sites for crack propagation under all the conditions investigated. The frequency of interlamellar cracking increased with stress, but this fracture mechanism was always of secondary importance. Translamellar cracking was only observed along the primary crack.Funding from the Spanish Ministry of Science and Innovation through projects (MAT2009-14547-C02-01 and MAT2009-14547-C02-02) is acknowledged. The Madrid Regional Government partially supported this project through the ESTRUMAT grant (P2009/MAT-1585). CJB acknowledges the support from the Spanish Ministry of Education for his sabbatical stay in Madrid (SAB2009-0045).Publicad