135 research outputs found
A Window on the Genetics of Human Speech: The FOXP2 Gene
The development of human speech seems to be a species-specific and genetically determined
capacity and is considered an extremely important step in the rise of modern humans, human culture and
civilisation. The multidisciplinary efforts of psychiatrists, linguists and human geneticists led to the identification
of genetic elements in cohorts of patients, performing speech and language disorders. A form of special language
impairment (SLI) has been identified in the KE family in Britain, as a dominant, autosomal trait, affecting the
family members in three generations. Molecular genetic studies revealed a mutation in the FOXP2 gene as
possible basis of SLI in these patients. The unique, human variant of FOXP2 is shared with Neandertals,
indicating a common, ancestral population 3-400,000 years ago. Imprecise imitation of the tutorâs song occurs in
young canaries with lowered FoxP2 expression
Self-Adaptive, Dynamic, Integrated Statistical and Information Theory Learning
The paper analyses and serves with a positioning of various error measures
applied in neural network training and identifies that there is no best of
measure, although there is a set of measures with changing superiorities in
different learning situations. An outstanding, remarkable measure called
published by Silva and his research partners represents a research
direction to combine more measures successfully with fixed importance weighting
during learning. The main idea of the paper is to go far beyond and to
integrate this relative importance into the neural network training
algorithm(s) realized through a novel error measure called . This
approach is included into the Levenberg-Marquardt training algorithm, so, a
novel version of it is also introduced, resulting a self-adaptive, dynamic
learning algorithm. This dynamism does not has positive effects on the resulted
model accuracy only, but also on the training process itself. The described
comprehensive algorithm tests proved that the proposed, novel algorithm
integrates dynamically the two big worlds of statistics and information theory
that is the key novelty of the paper.Comment: 62 pages, 30 figures, original articl
Karcagi nemesĂtĂ©sƱ Ćszi bĂșzafajtĂĄk (Triticum aestivum L.) tĂĄpanyag-reakciĂłjĂĄnak vizsgĂĄlata
ĂrpĂĄd-hĂĄzi Szent ErzsĂ©bet Ă©s PortugĂĄliai Szent ErzsĂ©bet hagiogrĂĄfiĂĄja. A kora Ășjkori szentkultusz kutatĂĄsĂĄhoz
Ăzleti intelligencia rendszerek felhasznĂĄlĂłi elfogadĂĄsa egy hazai közĂ©pvĂĄllalat pĂ©ldĂĄjĂĄn
Az utoÌbbi boÌ egy eÌvtizedben szeÌles vaÌllalati koÌr ismerte fel az uÌzleti intelligencia (business intelligence â BI) rendszerekben rejloÌ eloÌnyoÌket, s aÌldozott rengeteg eroÌforraÌst rendszerfejleszteÌsi eÌs -bevezeteÌsi projektekre. A vaÌrt eloÌnyoÌk realizaÌlaÌsaÌnak azonban fontos felteÌtele, hogy a technoloÌgiai uÌjiÌtaÌst a felhasznaÌloÌk elfogadjaÌk eÌs hasznaÌljaÌk. Az IT-rendszerek felhasznaÌloÌi elfogadaÌsaÌval eÌppen ezeÌrt reÌgoÌta foglalkoznak a kutatoÌk. E tanulmaÌny a BI sajaÌtossaÌgait figyelembe veÌve a szakirodalom alapjaÌn azonosiÌtja azon teÌnyezoÌket, melyek a felhasznaÌloÌi elfogadaÌst befolyaÌsoljaÌk, majd az azonosiÌtott teÌnyezoÌk menteÌn egy hazai koÌzeÌpvaÌllalat BI-rendszereÌnek felhasznaÌloÌi elfogadaÌsaÌt vizsgaÌlja a kulcsfelhasznaÌloÌkkal keÌsziÌtett interjuÌk segiÌtseÌgeÌvel. A tanulmaÌny arra vilaÌgiÌt raÌ, hogy a felhasznaÌloÌk egyeÌni jellemzoÌi, a szervezeti szintuÌ eÌs technoloÌgiai jellemzoÌk nem adnak eleÌgseÌges magyaraÌzatot a hasznaÌlat soraÌn megtapasztalt kedvezoÌtlen attituÌdvaÌltozaÌsra, azokat a rendszer hatalmi-politikai-kulturaÌlis hataÌsaival egyuÌtt kell eÌrtelmezni
Biomassza kĂŒlönbözĆ feltĂ©telek melletti Ă©gĂ©sĂ©nek termokĂ©miai Ă©s Ă©gĂ©selmĂ©leti vizsgĂĄlata = Thermocemical and theoretical combustion examination of biomass in different conditions
NövĂ©nyi biomasszĂĄk tĂŒzelĂ©stechnikai tulajdonsĂĄgainak komplex vizsgĂĄlati mĂłdszerĂ©t dolgoztuk ki. BĂĄzisadatok gyƱjtĂ©sĂ©hez a szilĂĄrd tĂŒzelĆanyagokra elĆĂrt szabvĂĄnyos eljĂĄrĂĄsokkal hatĂĄroztuk meg lĂĄgyszĂĄrĂș növĂ©nyek, valamint fenyĆfa aprĂtĂ©k nedvessĂ©g,- illĂł,- Ă©ghetĆ karbon,- hidrogĂ©n,- Ă©s hamutartalmĂĄt. BiomasszĂĄknĂĄl az illĂłtartalom meghatĂĄrozĂĄsĂĄra a szabvĂĄnyos mĂłdszer nem nyĂșjt megbĂzhatĂł adatokat. Az illĂłtartalom lĂĄgyszĂĄrĂș növĂ©nyek esetĂ©n 400oC, fĂĄknĂĄl 450 oC-os kigĂĄzosĂtĂĄssal hatĂĄrozhatĂł meg. BarnaszĂ©n-energiafƱ keverĂ©keknĂ©l a 20% hĆegyenĂ©rtĂ©kben bekevert energiafƱbĆl kilĂ©pĆ illĂłk elĆsegĂtik a begyulladĂĄst, gyorsĂtjĂĄk az Ă©gĂ©st. BarnaszĂ©n, feketeszĂ©n, Ă©s biomassza tĂŒzelĂ©sƱ gĆzkazĂĄnok hamujĂĄt SEM Ă©s RTG diffrakciĂłs mĂłdszerrel vizsgĂĄltuk. Az energiafƱ hamuja több mint 15m/m%, a napraforgĂł maghĂ©j 44% kĂĄliumot tartalmaz, amely a fƱtĆfelĂŒletek rendkĂvĂŒl gyors elsalakosodĂĄsĂĄt okozza. Az energiafƱ hamuja (15,5%) Cl-tartalmĂș. LĂĄgyszĂĄrĂș biomasszĂĄk hamuja erĆsen bĂĄzikus, magas Cl-tartalmĂșak, a szenek hamuja döntĆen savas, Cl-t csak nyomokban tartalmaz. FaaprĂtĂ©knak Ă©s a hozzĂĄkevert szennyvĂz iszapnak a lĂ©gszennyezĆk emissziĂłjĂĄra kifejtett hatĂĄsĂĄt fluidĂĄgyas gĆzkazĂĄnnĂĄl vizsgĂĄltuk tiszta faaprĂtĂ©k, 9, Ă©s 12,8 % hĆarĂĄnyĂș szennyvĂziszap bekeverĂ©s esetĂ©re: a szennyvĂz iszap N-tartalma nĂ©gyszer akkora, mint a faaprĂtĂ©kĂ©, ami a fĂŒstgĂĄz NO2 koncentrĂĄciĂłjĂĄt közel kĂ©tszeresĂ©re megnöveli. 12,8 % hĆarĂĄnyĂș szennyvĂz iszap bekeverĂ©se a fĂŒstgĂĄz porkoncentrĂĄciĂłjĂĄt 2,4- szeresĂ©re növeli. | A complex examination method of combustion characteristics of biomasses have been developed. In order to collect base data for herbaceous plants, pine woodchips have been determined using the standard methods. The standard method of determine the volatile content not provide reliable data in case of biomasses. The optimal gasification temperature of herbaceous plants (400oC) and of ligneous biomasses (450oC) have been determined. The features of ashes of brown coal, black coal and biomass fuels have been examined with measuring the softening point, methods of SEM and RTG diffraction. The ash of energy grass and sunflower seed shell contain 15m/m% and 44% potassium, respectively. This in case of the sunflower seed shell leads to quickly slagging of the heating surfaces of boiler. The ash of energy grass contains high amount of Cl (15,5%). The ashes of herbaceous biomasses have strong alkaline characteristics, with a high Cl content, the ashes of coals are acidic, only containing Cl in traces. The effect of mixing woodchips with sewage sludge on pollutant components have been examined in a fluid-bed steam boiler, with fuels containing purely wood chips and mixtures containing 9% and 12,8% sludge. Sewage sludge has a N content four times higher than woodchips, which results twofold increase of the NO2 concentration of the flue gas. Mixing in 12,8% wastewater sludge with the woodchips results in a 2.4-fold increase of the dust concentration of the flue gas
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