Search results for "MNA"

showing 10 items of 1167 documents

Patterns of cercarial production from Diplostomum spathaceum: terminal investment or bet hedging?

2004

In the production of the infective cercariae of trematodes, the terminal investment hypothesis of life-history theory predicts that the rate of host exploitation and cercarial production should increase during the period of cercarial shedding since the reproductive value of the parasite decreases during this period. In contrast, a bet hedging hypothesis that focuses on the success of transmission when host contact rate is variable predicts that cercarial production should decrease in an attempt to keep the host alive for longer and thus would increase the probability of successful transmission. We examined these two hypotheses under laboratory conditions and recorded the production ofDiplos…

ParasitismZoologyLymnaea stagnalisFresh WaterSnailTrematode InfectionsPulmonataHost-Parasite InteractionsCohort Studiesbiology.animalparasitic diseasesGastropodaAnimalsFinlandLymnaeabiologyEcologyIntermediate hostbiology.organism_classificationSurvival AnalysisCircadian RhythmInfectious DiseasesAnimal Science and ZoologyParasitologyReproductive valueTrematodaTrematodaParasitology

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Preparing students to participate to the didactic activities of university teacher

2016

«Student Voice» è un movimento pedagogico nato negli anni Novanta nei Paesi di lingua inglese (Stati Uniti, Canada, Inghilterra e Australia): esso sostiene la partecipazione attiva e responsabile degli studenti che frequentano la scuola e l’università nella didattica dei docenti, nella ricerca universitaria e nelle politiche educative e culturali che li riguardano. Nella ricerca sperimentale qui presentata, si è voluta prestare attenzione alla partecipazione degli studenti universitari (n. 33) alle attività didattiche di un docente di pedagogia sperimentale. Si è scelto di adottare due metodi d’intervento: la scrittura espressiva, come metodo di analisi del futuro prefigurato nelle aspettat…

ParticipaciónTeaching methodology in the universityVoce degli studenti Didattica universitaria partecipazione competenze trasversaliVoz de los estudiantes Didáctica universitaria participación competencias transversalesStudents’ voiceParticipationDidáctica universitariaCompetencias transversalesTransversal skillsVoz del alumnadostudents’ voice teaching methodology in the university participation transversal skillsSettore M-PED/03 - Didattica E Pedagogia Speciale

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Linking gamma-ray spectra of supernova remnants to the cosmic ray injection properties in the aftermath of supernovae

2017

The acceleration times of the highest-energy particles which emit gamma-rays in young and middle-age SNRs are comparable with SNR age. If the number of particles starting acceleration was varying during early times after the supernova explosion then this variation should be reflected in the shape of the gamma-ray spectrum. We use the solution of the non-stationary equation for particle acceleration in order to analyze this effect. As a test case, we apply our method to describe gamma-rays from IC443. As a proxy of the IC443 parent supernova we consider SN1987A. First, we infer the time dependence of injection efficiency from evolution of the radio spectral index in SN1987A. Then, we use the…