967 resultados para gastrintestinal transit


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O objetivo deste trabalho foi avaliar os efeitos de diferentes sistemas de pastejo, com ovinos e bovinos, sobre a quantidade de larvas no estágio L3 de nematódeos de ruminantes. O delineamento experimental foi inteiramente ao acaso, em arranjo fatorial com quatro sistemas de pastejo e quatro períodos de rotação de pastagem. A duração do experimento foi de 91 dias, com sistema rotacionado (7 dias de ocupação e 21 de descanso), em 8 ha de Panicum maximum cv. Tanzânia. Foram avaliados os sistemas de pastejo: alternado, simultâneo e isolado, com ovinos e com bovinos. Foram utilizados 20 bovinos (mestiços), 30 cordeiros e 15 ovelhas adultas (raça Santa Inês). As amostras do capim, para recuperação e identificação dos nematódeos, foram realizadas semanalmente no pré e pós-pastejo dos piquetes. Na média geral de todos os manejos, a ordem decrescente de número de larvas foi: Haemonchus spp., Trichostrongylus spp., Oesophagostomum spp., Strongyloides spp. e Cooperia spp. Correlações médias foram encontradas entre as quantidades de larvas L3 no pré e pós-pastejo. Com o aumento do número de rotações, houve aumento no grau de contaminação da pastagem pelas larvas, independentemente do sistema adotado. O sistema de pastejo simultâneo foi o que apresentou maior controle da carga parasitária de Haemonchus spp. na pastagem de capim-tanzânia.

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The goal of this research was to recommend specific changes relating to service by intercity buses and third level air carriers to propose an appropriate state role in the implementation of changes. Changes contemplated in this research were to be directed to the increased use of intercity buses and third level air carriers in such manner as to exert a benefit to user as well as the general public. Specific objectives of the project included: (1) to analyze the potential for a system of express intercity bus routes in Iowa; (2) to estimate the demand for third level air carrier services in cities having populations under 50,000; (3) to forecast the relationship between economic costs and benefits from an intercity bus system emphasizing express routes between major population centers and supporting a subsystem of local and intraregional public transportation; (4) to estimate the economic feasibility of expanded third level air carrier service with emphasis upon those routes proposed as worth of further evaluation; and (5) to provide guidance for establishing the need for state and local subsidies to institute a system of express intercity buses and to expand third level air carrier services. In addition to passenger movements, enhancing package freight shipments was also to be considered in the evaluation of proposed improvements.

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The purposes of this report (Phase II of the project) are to specify in mathematical form the individual modules of the conceptual model developed in Phase I, to identify and evaluate sources of data for the model set, and to develop the transport networks necessary to support the models.

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The purpose of this project is to develop an investment analysis model that integrates the capabilities of four types of analysis for use in evaluating interurban transportation system improvements. The project will also explore the use of new data warehousing and mining techniques to design the types of databases required for supporting such a comprehensive transportation model. The project consists of four phases. The first phase, which is documented in this report, involves development of the conceptual foundation for the model. Prior research is reviewed in Chapter 1, which is composed of three major sections providing demand modeling background information for passenger transportation, transportation of freight (manufactured products and supplies), and transportation of natural resources and agricultural commodities. Material from the literature on geographic information systems makes up Chapter 2. Database models for the national and regional economies and for the transportation and logistics network are conceptualized in Chapter 3. Demand forecasting of transportation service requirements is introduced in Chapter 4, with separate sections for passenger transportation, freight transportation, and transportation of natural resources and commodities. Characteristics and capacities of the different modes, modal choices, and route assignments are discussed in Chapter 5. Chapter 6 concludes with a general discussion of the economic impacts and feedback of multimodal transportation activities and facilities.

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Using the transit pulse method, we have determined compressional wave velocities of rocks from various geological units belonging to the Penninic zone along the NFP20-West profiles of the Swiss western Alps. The velocities have been measured at confining pressures up to 400 MPa, along three orthogonal axes defined by the macrostructure of the rocks. The samples analysed show a degree of metamorphism ranging from greenschist to eclogite facies. This collection includes schists, dolomites, gneisses and ophiolitic rocks. The mean velocities range from 5.9 km/s for a quartzitic calcschist to 7.9 km/s for an eclogitic metagabbro. The velocity anisotropy is as high as 20 %. The range of acoustic impedance is wide, from 15 to 27 10(6) kg/m2s. From these measurements, normal incident reflection coefficients for likely rock assemblages within and between geological units were estimated in order to interpret zone of the strong reflections recorded along the seismic profiles. Reflection coefficients as high as 0.17 could be determined.

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Venäjän voimakas talouskasvu on lisännyt merkittävästi myös logistiikkapalveluiden kysyntää maassa. Suuren pinta-alan, markkinapotentiaalin ja Euroopan ja Aasian välisen maantieteellisen sijainnin tarjoaman merkittävän kauttakulkupotentiaalin ansiosta Venäjä on erityisen kiinnostava investointikohde logistiikkayrityksille. Talouskasvu ei ole kuitenkaan jakautunut tasaisesti ja tämän vuoksi investoijan onkin syytä tarkoin selvittää minne Venäjän sisällä sijoittua. Tässä työssä on kartoitettu Venäjän logistiikkasektoria ja liikenneinfrastruktuuria sekä tarkasteltu kilpailutilannetta tavoitteena löytää logistiikkayrityksellekeskeisimmät sijaintikohteet Venäjällä. Moskova ja Pietari on rajattu tutkimuksen ulkopuolelle. Alan kirjallisuuteen ja aiheesta aiemmin laadittuihin tutkimuksiin perehtymällä on selvitetty yritysten sijaintipaikanvalinnalle asettamat tärkeimmät kriteerit. Logistiikkayrityksille toimivalla infrastruktuurilla on luonnollisesti oleellinen merkitys sijaintipaikkaa valittaessa, riittävän suuren markkinapotentiaalin ollessa toinen erittäin merkittävä kriteeri. Kirjallisuustarkastelun pohjalta potentiaalisiksi kohteiksi logistiikkayritykselle valikoitui 22 kaupunkia eri puolilta Venäjää. Monikriteerianalyysiin perustuvan pisteytysmenetelmän avulla toteutetussa potentiaalisten kohteiden luokittelussa kiinnostavimmiksi sijoittumiskohteiksi kohosivat Etelä-Venäjällä, Mustanmeren rannikolla sijaitsevat merkittävät satamakaupungit. Kehittyneen infrastruktuurin, merkittävän markkinapotentiaalin sekä suotuisten taloudellisten toimintaedellytysten ansiosta tarjoavat nämä erityisen merkittävän investointipotentiaalin logistiikkayrityksille.

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This paper analyses the effect of job accessibility by public and private transport on labour market outcomes in the metropolitan area of Barcelona. Beyond employment, we consider the effect of job accessibility on job-education mismatch, which represents a relevant aspect of job quality. We adopt a recursive system of equations that models car availability, employment and mismatch. Public transport accessibility appears as an exogenous variable in the three equations. Even though it may reflect endogenous residential sorting, falsification proofs suggest that the estimated effect of public transport accessibility is not entirely driven by the endogenous nature of residential decisions.

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Tämän työn tavoitteena on selvittää transitoreitin valintaan vaikuttavat tekijät sekä Suomen reitin kilpailutekijät verrattuna Baltian maiden, Saksan-Puolan ja Venäjän omiensatamien reitteihin. Lisäksi tavoitteena on testata analyyttista hierarkiaprosessia (AHP) transitoreitin valintaan. Työssä hyödynnetään Suomessa, Venäjällä ja Baltian maissa logistiikkayritysten, ministeriöiden ja viranomaisten kanssa tehtyjä asiantuntijahaastatteluja. Lisäksi suurimmille autotoimialan yrityksille toteutetaan kysely transitoreitin valintaan vaikuttavista tekijöistä. Työssä muodostetaan hierarkia reitin valintaan vaikuttavista tekijöistä. Lisäksi lasketaan analyyttisen hierarkiaprosessin mukaiset painotukset reitin valintaan vaikuttaville tekijöille ja eri reittien kilpailukykyerään autotoimialan vastaajan tapauksessa.

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Työn tavoitteena oli selvittää tullivastuiden jakautuminen toimijoiden välillä kontin eri kulkuvaiheissa sekä kartoittaa mahdolliset ongelmakohdat. Aluksi selvitettiin toimintaa nykyisessä muodossa ja transitoliikenteen kehitystä viime vuosina Suomessa sekä Trans-Siperian radan merkitystä transitoliikenteelle. Työssä tarkasteltiin tullilainsäädäntöä tullittomille tavarankäsittelyalueille ja sentoteuttamista Mustolan logistiikkakeskuksen vapaa-alueella. Tullilainsäädännöiija nykyisen vapaa-alueen toiminnan pohjalta tutkittiin eri vaihtoehtoja, joita tullittomat tavarankäsittelyalueet tarjoavat. Toimintaa vapaa-alueella tarkasteltiin turvallisuuden ja palvelun tehokkuuden varmistamiseksi. Tullivastuut ja velvollisuudet vapaa-alue toiminnassa ovat erittäin yksiselitteiset tullilainsäädännön perusteella. Toiminnassa ei havaittu puutteita tullivarastoinnista aiheutuvien vastuiden ja velvollisuuksien täyttämisessä. Vapaa-alueen toiminnassa tiedon kulku ja sen reaaliaikaisuus ovat turvallisuuden kannalta erittäin tärkeitä.

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BACKGROUND: People with neurological disease have a much higher risk of both faecal incontinence and constipation than the general population. There is often a fine dividing line between the two conditions, with any management intended to ameliorate, one risking precipitating the other. Bowel problems are observed to be the cause of much anxiety and may reduce quality of life in these people. Current bowel management is largely empirical with a limited research base. OBJECTIVES: To determine the effects of management strategies for faecal incontinence and constipation in people with neurological diseases affecting the central nervous system. SEARCH STRATEGY: We searched the Cochrane Incontinence Group Trials Register, the Cochrane Controlled Trials Register, MEDLINE, EMBASE and all reference lists of relevant articles. Date of the most recent searches: May 2000. SELECTION CRITERIA: All randomised or quasi-randomised trials evaluating any types of conservative, or surgical measure for the management of faecal incontinence and constipation in people with neurological diseases were selected. Specific therapies for the treatment of neurological diseases that indirectly affect bowel dysfunction have also been considered. DATA COLLECTION AND ANALYSIS: All three reviewers assessed the methodological quality of eligible trials and two reviewers independently extracted data from included trials using a range of pre-specified outcome measures. MAIN RESULTS: Only seven trials were identified by the search strategy and all were small and of poor quality. Oral medications for constipation were the subject of four trials. Cisapride does not seem to have clinically useful effects in people with spinal cord injuries (two trials). Psyllium was associated with increased stool frequency in people with Parkinson's disease but not altered colonic transit time (one trial). Some rectal preparations to initiate defecation produced faster results than others (one trial). Different time schedules for administration of rectal medication may produce different bowel responses (one trial). Mechanical evacuation may be more effective than oral or rectal medication (one trial). The clinical significance of any of these results is difficult to interpret. REVIEWER'S CONCLUSIONS: It is not possible to draw any recommendation for bowel care in people with neurological diseases from the trials included in this review. Bowel management for these people must remain empirical until well-designed controlled trials with adequate numbers and clinically relevant outcome measures become available.

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Tämätutkimus on osa TRAKET -hanketta, jossa keskitytään Luoteis-Venäjälle vievien transitoreittien kilpailukyvyn selvittämiseen. Tässä osatutkimuksessa tarkastellaan Suomen kautta kulkevan transitoliikenteen ympäristövaikutuksia ja turvallisuusnäkökohtia sekä niiden aiheuttamien kustannusten muuttumista liikennemäärän kasvaessa. Raportissa annetaan kehityssuosituksia ympäristö- ja onnettomuustilanteen parantamiseksi. Lisäksi tutkimuksessa esitetään uusien, transitoliikenteen osapuolille tarkoitettujen, lisäpalvelujen synnyttämiseen tarvittavia toimia.

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Tämä tutkimus on osa TRAKET-hanketta, jossa keskitytään Luoteis-Venäjälle vievien transitoreittien kilpailukyvyn selvittämiseen. Tässä tutkimusraportissa käsitellään transitoliikenteen reittien valintaan liittyviä päätöksentekokriteereitä ja verrataan niitä keskenään. Tutkimuksessa selvitetään transitoreitin valintaan vaikuttavat tekijät auto-, arvoelektroniikka- ja kosmetiikkatoimialoilla. Raportissa analysoidaan Suomen transitoreitin kilpailutekijät ja verrataan niitä vaihtoehtoisiin Baltian maiden, Saksan¿Puolan ja Venäjän omien satamien reitteihin.

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En este trabajo se ofrece una panorámica de los estimables fondos incunables de La Casa del Libro (San Juan, Puerto Rico) y se analizan los contenidos de dos impresos barceloneses en lengua catalana de temática religiosa: Vida e transit de Sanct Jheronim (1493) y Gamaliel (c. 1493). El examen de ambos ejemplares confirma su importancia, en especial del segimdo, pues se trata de un ejemplar único en el mundo. También se apuntan diversos aspectos de su dilatada trayectoria y se ofrece una hipótesis sobre su origen.

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BACKGROUND AND PURPOSE: The posterior circulation Acute Stroke Prognosis Early CT Score (pc-APECTS) applied to CT angiography source images (CTA-SI) predicts the functional outcome of patients in the Basilar Artery International Cooperation Study (BASICS). We assessed the diagnostic and prognostic impact of pc-ASPECTS applied to perfusion CT (CTP) in the BASICS registry population. METHODS: We applied pc-ASPECTS to CTA-SI and cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) parameter maps of BASICS patients with CTA and CTP studies performed. Hypoattenuation on CTA-SI, relative reduction in CBV or CBF, or relative increase in MTT were rated as abnormal. RESULTS: CTA and CTP were available in 27/592 BASICS patients (4.6%). The proportion of patients with any perfusion abnormality was highest for MTT (93%; 95% confidence interval [CI], 76%-99%), compared with 78% (58%-91%) for CTA-SI and CBF, and 46% (27%-67%) for CBV (P < .001). All 3 patients with a CBV pc-ASPECTS < 8 compared to 6/23 patients with a CBV pc-ASPECTS ≥ 8 had died at 1 month (RR 3.8; 95% CI, 1.9-7.6). CONCLUSION: CTP was performed in a minority of the BASICS registry population. Perfusion disturbances in the posterior circulation were most pronounced on MTT parameter maps. CBV pc-ASPECTS < 8 may indicate patients with high case fatality.

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INTRODUCTION: Perfusion-CT (PCT) processing involves deconvolution, a mathematical operation that computes the perfusion parameters from the PCT time density curves and an arterial curve. Delay-sensitive deconvolution does not correct for arrival delay of contrast, whereas delay-insensitive deconvolution does. The goal of this study was to compare delay-sensitive and delay-insensitive deconvolution PCT in terms of delineation of the ischemic core and penumbra. METHODS: We retrospectively identified 100 patients with acute ischemic stroke who underwent admission PCT and CT angiography (CTA), a follow-up vascular study to determine recanalization status, and a follow-up noncontrast head CT (NCT) or MRI to calculate final infarct volume. PCT datasets were processed twice, once using delay-sensitive deconvolution and once using delay-insensitive deconvolution. Regions of interest (ROIs) were drawn, and cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) in these ROIs were recorded and compared. Volume and geographic distribution of ischemic core and penumbra using both deconvolution methods were also recorded and compared. RESULTS: MTT and CBF values are affected by the deconvolution method used (p < 0.05), while CBV values remain unchanged. Optimal thresholds to delineate ischemic core and penumbra are different for delay-sensitive (145 % MTT, CBV 2 ml × 100 g(-1) × min(-1)) and delay-insensitive deconvolution (135 % MTT, CBV 2 ml × 100 g(-1) × min(-1) for delay-insensitive deconvolution). When applying these different thresholds, however, the predicted ischemic core (p = 0.366) and penumbra (p = 0.405) were similar with both methods. CONCLUSION: Both delay-sensitive and delay-insensitive deconvolution methods are appropriate for PCT processing in acute ischemic stroke patients. The predicted ischemic core and penumbra are similar with both methods when using different sets of thresholds, specific for each deconvolution method.