984 resultados para BoT


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This work is focused on the player experience and the design of artificial intelligence (AI) to meet player expectations in a competitive video game context. The original contribution of this research is a new approach to designing games and AI opponents that are more enjoyable for players to interact with, particularly in First Person Shooter (FPS) video games. This approach is modeled in detail and implemented in a prototype game AI called ThreatBot. The results show that the new AI design is more enjoyable to compete against, particularly with regards to player's perceived levels of competence.

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The kinetics of estrogen-induced elevation in the plasma concentration of riboflavin-binding protein, a minor yolk constituent, was investigated in immature male chicks, using a specific and sensitive radioimmunoassay proceudre. Following a single injection of the hormone, the plasma riboflavin-binding protein content was enhanced several-fold at 6 h. reaching peak levels around 48 h and declining thereafter. A two-fold amplication of the response was evident on secondary stimulation with the hormone. A 4-h lag phase prior to onset of induction was noticed during both primary and secondary stimulat ions with the steroid hormone. The magnitude of the response was dependent on the hormonal dose whereas the initial lag phase and the time of peak riboflavin-binding protein accumulation were unaltered within the range of hormonal doses tested. The half-life of riboflavin-binding protein in the circulation was 10 h, as calculated from measurement of the rate of disappearance of exogenously administered 125I-labelled protein. Simultaneous administration of progestrone did bot affect the kinetics of riboflavin-binding protein production. On the other hand, the antiestrogens, cis- and trans-clomiphene citrates, given 30 min prior to estrogen and cycloheximide, effectively countered the hormone-induced riboflavin-binding protein elaboration. Both progesterone and the anti-esterogens per se were completely ineffective in substituting for estrogen in the inductive ptrocess.

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Det tysta kunnandet utgör en stor del av kunskapsresursen både hos oss som individer och i arbetsorganisationerna. Trots att vi omger oss med böcker, manualer och databaser, som alla är exempel på explicit kunskap, så är det ”den rätta känslan”, erfarenheten och våra färdigheter som avgör om och hur vi klarar av våra uppgifter. Dessa begrepp är alla relaterade till den tysta dimensionen av kunskap. En dimension som traditionellt karaktäriserats som abstrakt, individuell, omedveten, praktisk, erfarenhetsbaserad och framför allt svår att uttrycka. Alla dessa är karaktärsdrag som ställt speciella krav inom kunskapsforskning och -ledning. Resultatet av detta är att både forskning och ledning av det tysta kunnandet har åsidosatts till förmån för forskning och ledning av explicit kunskap. Ett bidragande problem har varit bristen på lämpliga metoder för att ur ett företagsekonomiskt perspektiv studera och leda tyst kunnande. Ett annat problem har varit oklarhet i begreppet tyst kunskap. Detta har lett till brist på förståelse och/eller missförstånd. För att råda bot på svårigheten att uttrycka vårt tysta kunnande har människan utvecklat olika begrepp som i vår vardagskommunikation symboliserar tyst kunnande. Begrepp som intuition, människokännedom, förhandlingsförmåga och kultur används vanligt och med dem uttrycker vi den tysta dimensionen av kunnande. Dessa begrepp utgör även grunden för den intervjumetod som utvecklats för att empiriskt studera eller i ledningssyfte kartlägga tyst kunnande. Metoden använder dessa ”Epitet för Tyst Kunskap” (ETK) som bas för stimuluskort-intervjuer. Intervjuer som visat sig öka möjligheten att utforska och kartlägga tyst kunnande i organisationer oberoende av om man är forskare eller företagsledare.

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Sexual eukaryotes generate gametes using a specialized cell division called meiosis that serves both to halve the number of chromosomes and to reshuffle genetic variation present in the parent. The nature and mechanism of the meiotic cell division in plants and its effect on genetic variation are reviewed here. As flowers are the site of meiosis and fertilization in angiosperms, meiotic control will be considered within this developmental context. Finally, we review what is known about the control of meiosis in green algae and non-flowering land plants and discuss evolutionary transitions relating to meiosis that have occurred in the lineages giving rise to the angiosperms.

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Egun sare informatikoak ezinbesteko tresna bilakatu dira eguneroko eginkizun askotarako. Horren ondorioz, mota guztietako informazio mordoa garraiatzen da sarean barna. Sarearen erabilerak hainbat abantaila ekarri ditu, baina baita arriskuak ere. Sareko informazio horri guztiari etekina atera nahian zenbait informazio lapur eta zibergaizkilek tresnak garatzen dituzte etengabe. Arazo horri aurre egiteko babes mekanismo ugari garatu dituzte segurtasun aditu eta eragileek. Baina era berean, mekanismo horiek gainditzeko erasoak automatizatzeko eta indartzeko gai diren tresnak berriak agertu dira. Azken hauen artean kokatzen dira botnet-ak, gaur egungo mehatxu handienetako bat segurtasun aditu askoren iritziz. Botnetak kontroladore baten edo batzuen agindupean egon daitezkeen makina multzoak dira. Makina horiek, bot edo zombie izenez ezagunak, ezkutuan martxan dagoen software bati esker kontrolatu ohi dira. Jatorrian bot-en mekanismoa atazak automatizatzeko erabiltzen bazen ere, gaur egun ezaugarri hori aprobetxatuz erasoak eta beste motako ekintza ez-zilegi batzuk egiteko erabiltzen dira. Botneten tamaina milaka makinakoa izatera irits daiteke. Horri esker egin ditzaketen erasoen ahalmena handitu egiten da eta, ondorioz, etekin handiagoa ateratzeko aukerak handitzen dira ere. Beste ezaugarri nagusienetako bat malwareren bati esker kontrolpean dauden makinen jabeak ohartu gabe funtzionatzea da. Azken urteotan botneten hazkundea nabarmena izan da eta izugarrizko mehatxua bilakatu dira sarearen funtzionamendurako eta sareko sistemen segurtasunerako. Horrek motibatuta garatu da proiektu hau. Funtsean botnetak zer diren, hauen bilakaera eta nola funtzionatzen duten azaldu nahi da. Segurtasun neurri batzuk ere aztertzen dira. Azkenik, azterketa praktikoa ere lantzen da, Zeus eta Flu izeneko botnetak modu lokalean probatuz.

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The present thesis is focuses on the problem of Simultaneous Localisation and Mapping (SLAM) using only visual data (VSLAM). This means to concurrently estimate the position of a moving camera and to create a consistent map of the environment. Since implementing a whole VSLAM system is out of the scope of a degree thesis, the main aim is to improve an existing visual SLAM system by complementing the commonly used point features with straight line primitives. This enables more accurate localization in environments with few feature points, like corridors. As a foundation for the project, ScaViSLAM by Strasdat et al. is used, which is a state-of-the-art real-time visual SLAM framework. Since it currently only supports Stereo and RGB-D systems, implementing a Monocular approach will be researched as well as an integration of it as a ROS package in order to deploy it on a mobile robot. For the experimental results, the Care-O-bot service robot developed by Fraunhofer IPA will be used.

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