946 resultados para Original acquisition
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Outlines some of the potential risks or actual harms that result from large-scale land leases or acquisitions and the relevant human rights and environmental law principles.
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In two fMRI experiments, participants named pictures with superimposed distractors that were high or low in frequency or varied in terms of age of acquisition. Pictures superimposed with low-frequency words were named more slowly than those superimposed with high-frequency words, and late-acquired words interfered with picture naming to a greater extent than early-acquired words. The distractor frequency effect (Experiment 1) was associated with increased activity in left premotor and posterior superior temporal cortices, consistent with the operation of an articulatory response buffer and verbal selfmonitoring system. Conversely, the distractor age-of-acquisition effect (Experiment 2) was associated with increased activity in the left middle and posterior middle temporal cortex, consistent with the operation of lexical level processes such as lemma and phonological word form retrieval. The spatially dissociated patterns of activity across the two experiments indicate that distractor effects in picture-word interference may occur at lexical or postlexical levels of processing in speech production.
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Metabolic imaging using positron emission tomography (PET) has found increasing clinical use for the management of infiltrating tumours such as glioma. However, the heterogeneous biological nature of tumours and intrinsic treatment resistance in some regions means that knowledge of multiple biological factors is needed for effective treatment planning. For example, the use of 18F-FDOPA to identify infiltrative tumour and 18F-FMISO for localizing hypoxic regions. Performing multiple PET acquisitions is impractical in many clinical settings, but previous studies suggest multiplexed PET imaging could be viable. The fidelity of the two signals is affected by the injection interval, scan timing and injected dose. The contribution of this work is to propose a framework to explicitly trade-off signal fidelity with logistical constraints when designing the imaging protocol. The particular case of estimating 18F-FMISO from a single frame prior to injection of 18F-FDOPA is considered. Theoretical experiments using simulations for typical biological scenarios in humans demonstrate that results comparable to a pair of single-tracer acquisitions can be obtained provided protocol timings are carefully selected. These results were validated using a pre-clinical data set that was synthetically multiplexed. The results indicate that the dual acquisition of 18F-FMISO and 18F-FDOPA could be feasible in the clinical setting. The proposed framework could also be used to design protocols for other tracers.
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Scientists have injected endotoxin into animals to investigate and understand various pathologies and novel therapies for several decades. Recent observations have shown that there is selective susceptibility to Escherichia coli lipopolysaccharide (LPS) endotoxin in sheep, despite having similar breed characteristics. The reason behind this difference is unknown, and has prompted studies aiming to explain the variation by proteogenomic characterisation of circulating acute phase biomarkers. It is hypothesised that genetic trait, biochemical, immunological and inflammation marker patterns contribute in defining and predicting mammalian response to LPS. This review discusses the effects of endotoxin and host responses, genetic basis of innate defences, activation of the acute phase response (APR) following experimental LPS challenge, and the current approaches employed in detecting novel biomarkers including acute phase proteins (APP) and micro-ribonucleic acids (miRNAs) in serum or plasma. miRNAs are novel targets for elucidating molecular mechanisms of disease because of their differential expression during pathological, and in healthy states. Changes in miRNA profiles during a disease challenge may be reflected in plasma. Studies show that gel-based two-dimensional electrophoresis (2-DE) coupled with either matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) or liquid chromatography-mass spectrometry (LC-MS/MS) are currently the most used methods for proteome characterisation. Further evidence suggests that proteomic investigations are preferentially shifting from 2-DE to non-gel based LC-MS/MS coupled with data extraction by sequential window acquisition of all theoretical fragment-ion spectra (SWATH) approaches that are able to identify a wider range of proteins. Enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (qRT-PCR), and most recently proteomic methods have been used to quantify low abundance proteins such as cytokines. qRT-PCR and next generation sequencing (NGS) are used for the characterisation of miRNA. Proteogenomic approaches for detecting APP and novel miRNA profiling are essential in understanding the selective resistance to endotoxin in sheep. The results of these methods could help in understanding similar pathology in humans. It might also be helpful in the development of physiological and diagnostic screening assays for determining experimental inclusion and endpoints, and in clinical trials in future
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This technical report describes a Light Detection and Ranging (LiDAR) augmented optimal path planning at low level flight methodology for remote sensing and sampling Unmanned Aerial Vehicles (UAV). The UAV is used to perform remote air sampling and data acquisition from a network of sensors on the ground. The data that contains information on the terrain is in the form of a 3D point clouds maps is processed by the algorithms to find an optimal path. The results show that the method and algorithm are able to use the LiDAR data to avoid obstacles when planning a path from a start to a target point. The report compares the performance of the method as the resolution of the LIDAR map is increased and when a Digital Elevation Model (DEM) is included. From a practical point of view, the optimal path plan is loaded and works seemingly with the UAV ground station and also shows the UAV ground station software augmented with more accurate LIDAR data.
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Tutkielma käsittelee suomentamani Vampiraatit: Kirottujen laiva -nuortenromaanin käännösprosessia. Materiaalina on kustantajalle toimittamani näytekäännös, joka käsittää yhden kokonaisen luvun ja lisäksi kirjan tapahtumiin keskeisesti liittyvän runon. Molemmista tarkastellaan sekä lopullisia, julkaistuja versioita että ensimmäisiä raakaversioita. Julkaistut versiot ovat osa varsinaista tutkielmaa, raakaversiot ja lähtötekstit puolestaan on sisällytetty mukaan liitteinä. Tarkastelunäkökulmani on pääosin deskriptiivinen ja kontrastiivinen. Proosa-analyysi jakautuu kahteen osaan. Ensimmäisessä osassa tutkin tapoja, joilla käännökseni vastustaa ns. lisääntyvän standardisoitumisen lakia (the law of growing standardization), jota Gideon Toury on ehdottanut yleispäteväksi käännöslaiksi. Touryn laki ennustaa, että käännökset ovat useimmiten tyylillisesti alkuteoksiaan latteampia. Esimerkkini kuitenkin osoittavat, että kääntäjän on mahdollista valita ratkaisunsa niin, että latistumiselta vältytään, ainakin silloin, kun lähtöteksti on melko suoraviivaista. Proosa-analyysin jälkimmäinen osa keskittyy käännöksen muokkaamiseen. Vertaan siinä näytekäännös-luvun ensimmäistä versiota julkaistuun versioon ja tutkin muun muassa sitä, missä määrin ensimmäinen versio sisältää lähtökielen interferenssiä, ts. missä määrin englannille tyypilliset rakenteet paistavat siitä läpi. Tarkastelun kohteena ovat myös kohdekieliset kömpelyydet ja niiden poistaminen sekä pienet mutta kokonaisuuden kannalta tärkeät tyylilliset muutokset. Esimerkeistä käy selvästi ilmi kääntämisen prosessimainen luonne. Käännösnäytteeseen sisältyneen runon suomentaminen oli oma erillinen kokonaisuutensa. Tässä osiossa vertailen lähtötekstiä, raakaversiota ja julkaistua käännöstä rinnakkain säkeistö säkeistöltä. Tarkastelussa painottuvat edelleen tekstin muokkaaminen ja hiominen. Analyysien taustaksi esittelen lyhyesti alkuteoksen ja sen kirjoittajan Justin Somperin. Kuvailen myös omaa käännösfilosofiaani ja esittelen kaksi siihen voimakkaasti vaikuttanutta suomentajaa.
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Pro gradu- tutkielmassani tarkastelen suomi-ranska kaksikielisyyden kehittymistä perheissä, joissa vanhemmilla on eri äidinkieli. Työni tavoitteena on ollut tutkia kuinka eri ympäristötekijät vaikuttavat kaksikielisyyden omaksumiseen ja miten perheiden erilainen panostus vähemmistökielen, ts. kielen joka ei esiinny ympäristössä, oppimiseen näkyy saavutetuissa tuloksissa. Tutkimukseeni osallistui 13 perhettä, joilla on 10-12 vuotiaita, ranskaa ja suomea päivittäin käyttäviä lapsia. Lapsia oli yhteensä 18. Voidakseni tarkastella myös kieliympäristön vaikutusta oppimiseen valittiin perheistä kuusi Suomesta ja seitsemän Ranskasta sekä Sveitsin ranskankieliseltä alueelta. Tutkimusmenetelmiini kuului vanhempien haastattelu perheen sosiolingvististen tekijöiden selville saamiseksi ja lasten kanssa keskustelu suullisen kielitaidon arvioimiseksi. Pääpaino kielitaidon arvioinnissa oli kuitenkin kirjallisella tekstillä, jonka lapset tuottivat molemmilla kielillä tekstittömän kirjan kuvien perusteella. Teksteistä suoritettiin virheanalyysit, joissa eri virheet jaettiin ortografisiin, semanttisiin ja kieliopillisiin virheisiin. Jokaiselle lapselle lasketiin myös keskiarvo, joka osoitti kuinka monta sanaa tekstissä oli jokaista virhettä kohti. Näiden keskiarvojen pohjalta tutkittiin yhteneväisyyksiä virhemäärien sekä perheiden sosiolingvististen tekijöiden kesken. Yhteenvedossa verrattiin myös tuloksia teoriaosassa esitettyihin kielitieteilijöiden tarjoamiin periaatteisiin. Tutkielman perusteella voidaan todeta, että ympäristön vaikutus näytetään usein aliarvioitaneen kaksikielisyyttä koskevissa teoksissa. Hyvään kielitaitoon vähemmistökielessä tarvitaan enemmän kuin yksi kieli - yksi henkilö menetelmä, jossa vanhemmat puhuvat lapselle omaa äidinkieltään. Hyviksi vahvistuskeinoiksi havaittiin varsinkin kaksikielinen koulu sekä useat vierailut toisen vanhemman kotimaahan. Varsinkin perheen nuorimpien lasten vähemmistökielen oppimiseen tulisi panostaa sillä näillä on syntymästään asti mahdollisuus käyttää enemmistökieltä myös vanhempien sisarusten kanssa. Kieliympäristön vaikutuksesta havaittiin, että Suomessa asuvat lapset hallitsivat yleisesti ottaen paremmin vähemmistökielensä kuin Ranskassa asuvat. Tähän pidettiin syynä ranskalais-suomalaisen koulun positiivista vaikutusta kielen oppimiselle sekä ranskankielen arvostettua asemaa Suomessa. Avainsanat: Kaksikielisyys, kieltenoppiminen, bilinguisme, acquisition des langues, couple mixte
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The original pasture ecosystems of southern inland Queensland ranged from treeless grasslands on cracking clays through grassy woodlands of varying density on a great range of soil types to those competing at the dynamic edges of forests and scrubs. Fire, both wild and aboriginal-managed, was a major factor, along with rainfall extremes, in shaping the pastures and tree:grass balance. Seedling recruitment was driven by rainfall extremes, availability of germinable seed and growing space, with seed availability and space being linked to the timing and intensity of recent fires and rain. The impact of insects, diseases, severe wind and hailstorms on recruitment should not be underestimated. The more fertile soils had denser grass growth, greater fire frequency and thinner tree cover than infertile soils, except where trees were so dense that grass growth was almost eliminated. The pastures were dominated by perennial tussock grasses of mid-height but included a wide array of minor herbaceous species whose abundance was linked to soil type and recent seasonal conditions. Many were strongly perennial with Asteraceae, Fabaceae, Malvaceae, Cyperaceae and Goodeniaceae most common in an environment, which can experience effective rainfall at any time of year. The former grassland communities that are now productive farming lands are not easily returned to their original composition. However, conservation of remnant examples of original pasture types is very achievable provided tree density is controlled, prescribed burning and grazing are used and rigorous control of invasive, exotic species is undertaken. This should be done with a clear understanding that significant short-and medium-term fluctuations in botanical composition are normal.
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We study which factors in terms of trading environment and trader characteristics determine individual information acquisition in experimental asset markets. Traders with larger endowments, existing inconclusive information, lower risk aversion, and less experience in financial markets tend to acquire more information. Overall, we find that traders overacquire information, so that informed traders on average obtain negative profits net of information costs. Information acquisition and the associated losses do not diminish over time. This overacquisition phenomenon is inconsistent with predictions of rational expectations equilibrium, and we argue it resembles the overdissipation results from the contest literature. We find that more acquired information in the market leads to smaller differences between fundamental asset values and prices. Thus, the overacquisition phenomenon is a novel explanation for the high forecasting accuracy of prediction markets.
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This paper describes a new knowledge acquisition method using a generic design environment where context-sensitive knowledge is used to build specific DSS for rural business. Although standard knowledge acquisition methods have been applied in rural business applications, uptake remains low and familiar weaknesses such as obsolescence and brittleness apply. We describe a decision support system (DSS) building environment where contextual factors relevant to the end users are directly taken into consideration. This "end user enabled design environment" (EUEDE) engages both domain experts in creating an expert knowledge base and business operators/end users (such as farmers) in using this knowledge for building their specific DSS. We document the knowledge organisation for the problem domain, namely a dairy industry application. This development involved a case-study research approach used to explore dairy operational knowledge. In this system end users can tailor their decision-making requirements using their own judgement to build specific DSSs. In a specific end user's farming context, each specific DSS provides expert suggestions to assist farmers in improving their farming practice. The paper also shows the environment's generic capability.
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The aim was to analyse the growth and compositional development of the receptive and expressive lexicons between the ages 0,9 and 2;0 in the full-term (FT) and the very-low-birth-weight (VLBW) children who are acquiring Finnish. The associations between the expressive lexicon and grammar at 1;6 and 2;0 in the FT children were also studied. In addition, the language skills of the VLBW children at 2;0 were analysed, as well as the predictive value of early lexicon to the later language performance. Four groups took part in the studies: the longitudinal (N = 35) and cross-sectional (N = 146) samples of the FT children, and the longitudinal (N = 32) and cross-sectional (N = 66) samples of VLBW children. The data was gathered by applying of the structured parental rating method (the Finnish version of the Communicative Development Inventory), through analysis of the children´s spontaneous speech and by administering a a formal test (Reynell Developmental Language Scales). The FT children acquired their receptive lexicons earlier, at a faster rate and with larger individual variation than their expressive lexicons. The acquisition rate of the expressive lexicon increased from slow to faster in most children (91%). Highly parallel developmental paths for lexical semantic categories were detected in the receptive and expressive lexicons of the Finnish children when they were analysed in relation to the growth of the lexicon size, as described in the literature for children acquiring other languages. The emergence of grammar was closely associated with expressive lexical growth. The VLBW children acquired their receptive lexicons at a slower rate and had weaker language skills at 2;0 than the full-term children. The compositional development of both lexicons happened at a slower rate in the VLBW children when compared to the FT controls. However, when the compositional development was analysed in relation to the growth of lexicon size, this development occurred qualitatively in a nearly parallel manner in the VLBW children as in the FT children. Early receptive and expressive lexicon sizes were significantly associated with later language skills in both groups. The effect of the background variables (gender, length of the mother s basic education, birth weight) on the language development in the FT and the VLBW children differed. The results provide new information of early language acquisition by the Finnish FT and VLBW children. The results support the view that the early acquisition of the semantic lexical categories is related to lexicon growth. The current findings also propose that the early grammatical acquisition is closely related to the growth of expressive vocabulary size. The language development of the VLBW children should be followed in clinical work.
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Fiji leaf gall, caused the Fiji disease virus (genus Fijivirus, family Reoviridae, FDV), is a serious disease of sugarcane, Saccharum officinarum L., in Australia and several other Asia-Pacific countries. In Australia FDV is transmitted only by the planthopper Perkinsiella saccharicida Kirkaldy (Hemiptera: Delphacidae), in a propagative manner. Successful transmission of FDV by single planthoppers confined to individual virus free plants is highly variable, even under controlled conditions. The research reported here addresses two possible sources of this variation: 1) gender, wing form, and life stage of the planthopper; and 2) genotype of the source plant. The acquisition of FDV by macropterous males, macropterous females, brachypterous females, and nymphs of P. saccharicida from infected plants was investigated using reverse transcription-polymerase chain reaction to diagnose FDV infection in the vector. The proportion of individuals infected with FDV was not statistically related to life stage, gender, or adult wing form of the vector. The acquisition of FDV by P. saccharicida from four cultivars of sugarcane was compared to assess the influence of plant genotype on acquisition. Those planthopper populations reared on diseased 'NCo310' plants had twice as many infected planthoppers as those reared on 'Q110', 'WD1', and 'WD2'. Therefore, variation in FDV acquisition in this system is not the result of variation in the gender, wing form and life stage of the P. saccharicida vectors. The cultivar used as the source plant to rear vector populations does affect the proportion of infected planthoppers in a population.
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Fiji leaf gall (FLG) caused by Sugarcane Fiji disease virus (SCFDV) is transmitted by the planthopper Perkinsiella saccharicida. FLG is managed through the identification and exploitation of plant resistance. The glasshouse-based resistance screening produced inconsistent transmission results and the factors responsible for that are not known. A series of glasshouse trials conducted over a 2-year period was compared to identify the factors responsible for the erratic transmission results. SCFDV transmission was greater when the virus was acquired by the vector from a cultivar that was susceptible to the virus than when the virus was acquired from a resistant cultivar. Virus acquisition by the vector was also greater when the vector was exposed to the susceptible cultivars than when exposed to the resistant cultivar. Results suggest that the variation in transmission levels is due to variation in susceptibility of sugarcane cultivars to SCFDV used for virus acquisition by the vector.
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Our research programme with elite athletes has investigated and implemented learning design from an ecological dynamics perspective, examining its effects on movement coordination and control and the acquisition of expertise. Ecological dynamics is a systemsoriented theoretical rationale for understanding the emergent relations in a complex system formed by each performer and a performance environment. This approach has identified the individual-environment relationship as the relevant scale of analysis for modelling how processes of perception, cognition and action underpin expert performance in sport (Davids et al., 2014; Zelaznik, 2014). In this chapter we elucidate key concepts from ecological dynamics and exemplify how they have informed our understanding of relevant psychological processes including: movement coordination and its acquisition, learning and transfer, impacting on practice task design in high performance programmes.