Structured System and Software Design of Distributed Control Computer of Mechatronic Facility for Space Research

The structured system and software designmethod of the distributed control computer network of themechatronic scientific facility for automatic hightemperature material processing in the space in microgravitationenvironment is presented in the paper. Thefacility distributed computer controls special extra lowspeed vibrationless electric drives, multi-zone hightemperature furnace heating system and severalmeasurement devices. The computer is equipped withspecial technological language to be possible to specifyexperiment time flow. Computer network nodes have manyuser processes (threads) so efficient, reliable, selfdocumented, and low overhead scheduler dispatcher isrequired. The table driven coroutines have been designed

Relatório de estágio em farmácia comunitária

Relatório de estágio realizado no âmbito do Mestrado Integrado em Ciências Farmacêuticas, apresentado à Faculdade de Farmácia da Universidade de Coimbr

Fenologické tendence složek jihomoravského lužního lesa na příkladu habrojilmové jaseniny (Ulmi-Fraxineta Carpini) za období 1961-2000. Část II. Fenologie bylin a ptáků

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Vliv regionálního oteplování na vzrůst proměnlivosti reprodukčního procesu u rostlin a živočichů v lužním lese v letech 1961-2000

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Climatic factors and their influence on onset and duration of phenological phases of chosen plants at locations south Moravia during 1961–2007

In this work phenological phases of three species – ramson (Allium ursinum L.), hawthorn (Crataegus oxya­can­tha L.) and oak tree (Quercus robur L.) were evaluated on two research plots Lednice and Lanžhot during 1961–2007. Both plots represent protected flood-plain forests with no forestry management. The aim of this work is to assess which meteorological parameters influence the most duration of phenophases, to analyse shifts of phenophase timing during the period 1961 to 2007 and to compare phenological and temperature trends in this period. The meteorological and phenological data processed by software AnClim and FenoClim. Results showed that maximum and mean temperature influenced the duration of phenophases most significantly. The higher temperatures caused shortening of phe­no­pha­ses and vice versa. Per 1°C temperature increas the given phenophase its length will decrease by 2.3 days in case of oak tree, by 0.8 days in the case of hawthorn and by 1.3 days in the case of ramson. The onset of phenophases has advanced by 9 to 10 days during the period of 47 years

Assessment of Active Wheelset Steering System Using Computer Simulations and Roller Rig Tests

The paper is created within a project which aims to design a system of active wheelset steering for an electric four-axle locomotive. The wheelset steering system enables reduction in forces acting in the wheel-rail contacts in a curved track and consequently a reduction in wear and maintenance costs of both vehicles and rails is achieved. The project consists of three main parts: computer simulations, scaled roller rig experiments, and field tests. The paper is focused on the fundamental aspects of the first and the second part on the project. Track curvature estimation based on the rotation of the bogies towards the car body is proposed and assessed by computer simulations across varying track radiuses, vehicle speeds, and friction conditions. The scaled roller rig has been innovated in order to simulate bogie run in a curved track with uncompensated value of lateral acceleration and instrumented with a system of measurement of lateral wheel-rail forces. The experimental bogie has been equipped with systems of active wheelset steering and measurement of axle-box forces. The experiment setup, newly developed and applied systems of forces measurement and wireless signal transmission, and results of the first experiments are described in detail. Performed computer simulations and scaled roller rig experiments show that active wheelset steering is effective and practically implementable method of reducing guiding forces acting between railway vehicle wheels and rails in a curved track

Vliv regionálního oteplování na vzrůst proměnlivosti reprodukčního procesu u rostlin a živočichů v lužním lese v letech 1961-2000

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Assessment of Active Wheelset Steering System Using Computer Simulations and Roller Rig Tests

The paper is created within a project which aims to design a system of active wheelset steering for an electric four-axle locomotive. The wheelset steering system enables reduction in forces acting in the wheel-rail contacts in a curved track and consequently a reduction in wear and maintenance costs of both vehicles and rails is achieved. The project consists of three main parts: computer simulations, scaled roller rig experiments, and field tests. The paper is focused on the fundamental aspects of the first and the second part on the project. Track curvature estimation based on the rotation of the bogies towards the car body is proposed and assessed by computer simulations across varying track radiuses, vehicle speeds, and friction conditions. The scaled roller rig has been innovated in order to simulate bogie run in a curved track with uncompensated value of lateral acceleration and instrumented with a system of measurement of lateral wheel-rail forces. The experimental bogie has been equipped with systems of active wheelset steering and measurement of axle-box forces. The experiment setup, newly developed and applied systems of forces measurement and wireless signal transmission, and results of the first experiments are described in detail. Performed computer simulations and scaled roller rig experiments show that active wheelset steering is effective and practically implementable method of reducing guiding forces acting between railway vehicle wheels and rails in a curved track

Dopad změny klimatu a vodního režimu na biodiverzitu lužního lesa na příkladu habrojilmové jaseniny (ulmi-fraxineta carpini)

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Vliv vývoje klimatu na průběh fenofáze kvetení ovocných dřevin na jižní Moravě v letech 1951-2000 =The impact of climate change on the course of phenological phase of fruit trees flowering in Southern Moravia (Czech Republic) during 1951-2000

Průměrná roční teplota vzduchu stoupla za padesátileté období (1951-2000) na jižní Moravě o 0,9 °C a v období kalendářního jara o 1,2 °C. Na tento vzrůst teplot reagovaly ovocné dřeviny posunem fenofáze začátku kvetení u meruňky o 13,7 dnů a fenofáze plného kvetení o 11,7 dnů, u třešně posunem fenofází začátku kvetení o 9,5 dnů a fenofáze plného kvetení o 7,4 dnů, u hrušně o 7,8 dnů a 6,5 dnů a u jabloně o 7,2 dnů a 7,4 dnů do dřívější doby. Z vyhodnocení vyplývá, že se fenofáze prvého květu v průměru uspíšila za padesátileté období o 8,7 dnů a fenofáze plného kvetení v průměru o 7,5 dnů. Závěrem této studie je, že fenofáze ovocných dřevin na jižní Moravě, lokalita Lednice (176 m n. m., 48°47´, 16°47´) byly ovlivněny změnou klimatu. Změnily se v korelaci s nárůstem teploty v období kalendářního jara.Over the time span of fifty years, the average annual temperature in this area increased by 0.9 °C and the average spring temperature increased by 1.2 °C. In the observed period, the dates of the start of flowering of apricot tree (Prunus Armeniaca) advanced by 13.7 days and full flowering by 11.7 days, in the case of sweet cherry (Prunus avium) the dates of the start of flowering advanced by 9.5 and full flowering by 7.4 days, in the case of pear (Pyrus communis) by 7.8 and 6.5 days, in the case of apple tree (Malus pumilas) by 7.2 and 7.4 days. Overall, the phenological events of the fruit trees advanced the the start of flowering by 8.7 days and full flowering by 7.5 days. The conclusion of this study is that the phenology of fruit trees of South Moravia, locality Lednice (elevation 176 m, 48° 47´, 16° 47´), was influenced by the climate change. It has changed in the correlation with the increase of the spring air temperature.10711