Future prospects of short distance rail based passenger transport in Northern Europe

The worlds’ population is increasing and cities have become more crowded with people and vehicles. Communities in the fringe of metropolitans’ increase the traffic done with private cars, but also increase the need for public transportation. People have typically needs traveling to work located in city centers during the morning time, and return to suburbs in the afternoon or evening. Rail based passenger transport is environmentally friendly transport mode with high capacity to transport large volume of people. Railways have been regulated markets with national incumbent having monopoly position. Opening the market for competition is believed to have a positive effect by increasing the efficiency of the industry. National passenger railway market is opened for competition only in few countries, where as international traffic in EU countries was deregulated in 2010. The objective of this study is to examine the passenger railway market of three North European countries, Sweden, Denmark and Estonia. The interest was also to get an understanding of the current situation and how the deregulation has proceeded. Theory of deregulation is unfolded with literature analyses and empirical part of the study is constructed from two parts. Customer satisfaction survey was chosen as a method to collect real life experiences from the passengers and measure their knowledge of the market situation and possible changes appeared. Interviews of experts from the industry and labor unions give more insights and able better understanding for example of social consequences caused from opening the market for competition. Expert interviews were conducted by using semi-structured theme interview. Based on the results of this study, deregulation has proceeded quite differently in the three countries researched. Sweden is the most advanced country, where the passenger railway market is open for new entrants. Denmark and Estonia are lagging behind. Opening the market is considered positive among passengers and most of the experts interviewed. Common for the interviews were the labour unions negative perspective concerning deregulation. Despite the fact deregulation is considered positive among the respondents of the customer satisfaction survey, they could not name railway undertakings operating in their country. Generally respondents were satisfied with the commuter trains. Ticket price, punctuality of trains and itinerary affect the most to customer satisfaction.

Growth, magnetic and transport properties of InSb and II-IV-As2 semiconductors doped with manganese

This thesis is devoted to growth and investigations of Mn-doped InSb and II-IV-As2 semiconductors, including Cd1-xZnxGeAs2:Mn, ZnSiAs2:Mn bulk crystals, ZnSiAs2:Mn/Si heterostructures. Bulk crystals were grown by direct melting of starting components followed by fast cooling. Mn-doped ZnSiAs2/Si heterostructures were grown by vacuum-thermal deposition of ZnAs2 and Mn layers on Si substrates followed by annealing. The compositional and structural properties of samples were investigated by different methods. The samples consist of micro- and nano- sizes clusters of an additional ferromagnetic Mn-X phases (X = Sb or As). Influence of magnetic precipitations on magnetic and electrical properties of the investigated materials was examined. With relatively high Mn concentration the main contribution to magnetization of samples is by MnSb or MnAs clusters. These clusters are responsible for high temperature behavior of magnetization and relatively high Curie temperature: up to 350 K for Mn-doped II-IV-As2 and about 600 K for InMnSb. The low-field magnetic properties of Mn-doped II-IV-As2 semiconductors and ZnSiAs2:Mn/Si heterostructures are connected to the nanosize MnAs particles. Also influence of nanosized MnSb clusters on low-field magnetic properties of InMnSb have been observed. The contribution of paramagnetic phase to magnetization rises at low temperatures or in samples with low Mn concentration. Source of this contribution is not only isolated Mn ions, but also small complexes, mainly dimmers and trimmers formed by Mn ions, substituting cation positions in crystal lattice. Resistivity, magnetoresistance and Hall resistivity properties in bulk Mn-doped II-IV-As2 and InSb crystals was analyzed. The interaction between delocalized holes and 3d shells of the Mn ions together with giant Zeeman splitting near the cluster interface are respond for negative magnetoresistance. Additionally to high temperature critical pointthe low-temperature ferromagnetic transition was observed Anomalous Hall effect was observed in Mn doped samples and analyzed for InMnSb. It was found that MnX clusters influence significantly on magnetic scattering of carriers.

Temperature effect in potassium and nitrate ions in soil transport

When doing researches on solute dynamics in porous medium, the knowledge of medium characteristics and percolating liquids, as well as of external factors is very important. An important external factor is temperature and, in this sense, our purpose was determining potassium and nitrate transport parameters for different values of temperature, in miscible displacement experiments. Evaluated parameters were retardation factor (R), diffusion/dispersion coefficient (D) and dispersivity, at ambient temperature (25 up to 28 ºC), 40 ºC and 50 ºC. Salts used were potassium nitrate and potassium chlorate, prepared in a solution made up of 5 ppm nitrate and 2.000 ppm potassium, with Red-Yellow Latosol porous medium. Temperature exhibited a positive influence upon porous medium solution and upon dispersion coefficient.

Transport of broilers: load microclimate during Brazilian summer

The objective of this study was to characterize the microclimatic profile of broiler transport trucks under commercial conditions, in the summer, by continuous monitoring of environmental variables (temperature and air relative humidity). Three loads were monitored from farm to slaughterhouse, considering factors such as distance and day periods (morning, afternoon, and night). To obtain the profile of the environmental variables during journey, data loggers, that determined the microclimate to which birds were submitted, were installed in the trucks; data loggers also allowed visualization of the Enthalpy Comfort Index (ECI) so that load regions could be classified according to heat comfort limits for 6-week old poultries. Temperature, relative humidity, and ECI in the truck were analyzed, using geostatistics, by the ordinary kriging method. The afternoon was the most critical period, and truck central and rear regions were most problematic for chickens, thus most susceptible to losses.

Effect of companion ion on nitrate displacement through transport parameters analysis

Nitrate is the main form of nitrogen associated with water contamination; the high mobility of this species in soil justifies the concern regarding nitrogen management in agricultural soils. Therefore, the objective of this research was to assess the effect of companion cation on nitrate displacement, by analyzing nitrate transport parameters through Breakthrough Curves (BTCs) and their settings made by numerical model (STANMOD). The experiment was carried out in the Soil and Water Quality Laboratory of the Department of Biosystems Engineering, "Luiz de Queiroz" College of Agriculture in Piracicaba (SP), Brazil. It was performed using saturated soil columns in steady-state flow condition, in which two different sources of inorganic nitrate Ca(NO3)2 and NH4NO3 were applied at a concentration of 50 mg L-1 NO3-. Each column was filled with either a Red-Yellow Oxisol (S1) or an Alfisol (S2). Results are indicative that the companion ion had no effect on nitrate displacement. However, nitrate transport was influenced by soil texture, particle aggregation, solution speed in soil and organic matter presence. Nitrate mobility was higher in the Alfisol (S2).

Centre for Economic Development, Transport and the Environment : Prosperity, competitiveness, sustainable development

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Strategy for 2012–2015 : The Centres for Economic Development, Transport and the Environment create sustainable well-being

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Centres for Economic Development, Transport and the Environment at Your Service

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Turun seudun turvallisen ja kestävän liikkumisen suunnitelma

Turun seudun turvallisen ja kestävän liikkumisen suunnitelma on laadittu seudun kuntien ja Varsinais-Suomen ELY-keskuksen yhteistyönä. Suunnitelmassa on selvitetty liikenneturvallisuuden, liikkumisen, toimintaympäristön ja liikennejärjestelmän nykytilaa sekä kartoitettu liikenneturvallisuusongelmia erilaisten analyysien ja kyselyiden avulla. Nykytila-analyysin pohjalta on asetettu liikenneturvallisuustyön visio ja tavoitteet sekä määritetty toimenpide-ehdotukset. Tavoitteisiin pääsemistä tukevat liikenneympäristön parantamistoimenpiteiden ohjelma, liikkumisen ohjauksen toimintaohjelma sekä hallintokuntien liikenneturvallisuustyön toimenpiteistä kootut toimintasuunnitelmat. Onnettomuusanalyysin perusteella liikenneturvallisuuden tila oli Turun seudulla hieman koko Suomen keskiarvoa heikompi. Seudulla tapahtui vuosina 2001-2010 henkilövahinkoon johtaneita onnettomuuksia keskimäärin 132 / 100 000 asukasta, kun vastaava luku oli 126 koko maan osalta. Kuolemaan johtaneita onnettomuuksia tapahtui seudulla vähemmän, mutta loukkaantumiseen johtaneita onnettomuuksia koko maan keskiarvoa enemmän. Onnettomuuksissa kuoli tai loukkaantui koko maan keskiarvoa enemmän jalankulkijoita ja polkupyöräilijöitä. Lukumäärällisesti eniten onnettomuuksia tapahtui 18–19-vuotiaille, mutta henkilövahinkoon johtaneita onnettomuuksia tapahtui selvästi eniten 15–16-vuotiaille. Seudulla tapahtuneista liikenneonnettomuuksista aiheutui vuosittain keskimäärin 127,2 miljoonan euron kustannukset, josta kuntien osuus oli vuosittain noin 22,3 miljoonaa euroa. Asukkaille suunnatun kyselyn mukaan sekä työmatkat että lyhyet vapaa-ajan matkat tehtiin useimmiten henkilöautolla. Koululaisia pidettiin turvattomimpana tienkäyttäjäryhmänä, ja kävelyä sekä pyöräilyä turvattomimpina kulkutapoina. Välinpitämättömyyttä pidettiin merkittävimpänä syynä erilaisiin liikennerikkomuksiin ja tärkeimmäksi kehittämistarpeeksi nousi liikennekäyttäytyminen. Yhdyskuntarakenteen ja toimintaympäristön analyysin perusteella seudulla on hyvät edellytykset kestävien kulkumuotojen kuten joukkoliikenteen houkuttelevuuden lisäämiselle sekä kävelyn ja pyöräilyn verkoston kehittämiselle. Onnettomuusanalyysin ja valtakunnallisten tavoitteiden pohjalta Turun seudulle asetettiin liikenneturvallisuustyön tavoitteet. Tavoitelaskelman mukaan liikennekuolemien ja loukkaantuneiden määrä tulee puolittaa vuosien 2006-2010 keskiarvosta vuoteen 2020 mennessä. Tavoitteen mukaan liikenteessä kuolee enintään 6 (lähtötaso 12) ja loukkaantuu 236 (lähtötaso 471) vuonna 2020. Vaikutusarvion perusteella voidaan arvioida päästävän tavoitteeseen suunnitelmakauden aikana. Tavoitteiden saavuttaminen on kuitenkin haasteellista ja edellyttää tehokasta yhteistyötä eri tahojen välillä. Tavoitteeseen tulee pyrkiä laajaa keinovalikoimaa käyttäen. Suunnitelmatyön aikana aktivoitiin kuntien turvallisen ja kestävän liikkumisen ryhmät, joiden toiminnan tueksi laadittiin toimintasuunnitelmat sekä vuosikello työn eri vaiheista. Ryhmät vastaavat suunnitelman toteuttamisesta, toteutumisen seurannasta ja tarvittaessa päivittämisestä.

Power cycling lifetime estimation of IGBT power modules based on chip temperature modeling

In this doctoral thesis, methods to estimate the expected power cycling life of power semiconductor modules based on chip temperature modeling are developed. Frequency converters operate under dynamic loads in most electric drives. The varying loads cause thermal expansion and contraction, which stresses the internal boundaries between the material layers in the power module. Eventually, the stress wears out the semiconductor modules. The wear-out cannot be detected by traditional temperature or current measurements inside the frequency converter. Therefore, it is important to develop a method to predict the end of the converter lifetime. The thesis concentrates on power-cycling-related failures of insulated gate bipolar transistors. Two types of power modules are discussed: a direct bonded copper (DBC) sandwich structure with and without a baseplate. Most common failure mechanisms are reviewed, and methods to improve the power cycling lifetime of the power modules are presented. Power cycling curves are determined for a module with a lead-free solder by accelerated power cycling tests. A lifetime model is selected and the parameters are updated based on the power cycling test results. According to the measurements, the factor of improvement in the power cycling lifetime of modern IGBT power modules is greater than 10 during the last decade. Also, it is noticed that a 10 C increase in the chip temperature cycle amplitude decreases the lifetime by 40%. A thermal model for the chip temperature estimation is developed. The model is based on power loss estimation of the chip from the output current of the frequency converter. The model is verified with a purpose-built test equipment, which allows simultaneous measurement and simulation of the chip temperature with an arbitrary load waveform. The measurement system is shown to be convenient for studying the thermal behavior of the chip. It is found that the thermal model has a 5 C accuracy in the temperature estimation. The temperature cycles that the power semiconductor chip has experienced are counted by the rainflow algorithm. The counted cycles are compared with the experimentally verified power cycling curves to estimate the life consumption based on the mission profile of the drive. The methods are validated by the lifetime estimation of a power module in a direct-driven wind turbine. The estimated lifetime of the IGBT power module in a direct-driven wind turbine is 15 000 years, if the turbine is located in south-eastern Finland.

Ansökan om transportbidrag för transport av kompletteringsmjölk …

21 x 29 cm

Bestämmelser angående transport av reglementering underkastade förnödenheter

17 x 25 cm

Fordson - produktivare jordbruk fördelaktigare transport

kuv., 24 x 12 cm

Transport-küsimuse lahendus

kuv., 14 x 22 cm

1936 Ford V-8 alltid redo till ekonomisk transport

kuv., 17 x 23 cm