Search results for "LER"
showing 10 items of 14795 documents
Female reproductive factors are associated with objectively measured physical activity in middle-aged women
2017
Physical activity improves health and may delay the onset of several chronic diseases. For women in particular, the rate of these diseases accelerates at middle age; therefore it is important to identify the determinants of health-enhancing physical activity during midlife in this population. In this study, we focused on determinants that are unique to the female sex, such as childbearing and menopause. The main objective was to characterize the level of physical activity and differences between active and inactive middle-aged Finnish women. In addition, we examined the association of physical activity with female reproductive factors at midlife. The study population consisted of 647 women …
Estudi clínic,neuropsicològic i de Ressonància magnètica de l´Esclerosi Múltiple primària progressiva
2015
L´esclerosi múltiple primària progressiva es presenta entre un 10-15 % dels pacients, ve definida per un curs progressiu sense brots clars i amb una presentació típica en forma de paraparèsia espàstica fins en un 80 % dels casos. No disposa de tractament aprovat modificador de la malaltia en l´actualitat si bé s´ha vist en base a estudis d´inflamació en LCR que podria existir un subgrup que tindrien un perfil clínic diferent amb inflamació i es podrien beneficiar de tractament. Es tracta doncs, d’un subtipus d’ EM que suposa un repte per a la pràctica clínica, caracteritzat per la progressió inevitable de la discapacitat. És per això que el nostre estudi es va basar en explorar el patró clí…
Measures of the Massive Mountain in Aleksis Kivi’s Play Kullervo
2022
The story of a prisoner inside an enormous steel mountain is embedded in Kullervo, an early Finnish tragedy by 19th-century author Aleksis Kivi. I focus here on the exceptional size of the mountain, as told by the main character, Kullervo. Although the embedded story has aroused admiration in research, the mountain’s size and form do not appear to have done so. If taken literally, and assuming the shape of a double pyramid, at a minimum, the mountain’s surface area would be between that of Earth and Uranus, a planet that Kivi was somehow aware of. The mountain’s maximum surface area and volume would greatly exceed that of the Sun. This mountain cannot be localized in the near environment of…
Teacher-child interactions as a context for developing social competence in toddler classrooms
2022
The present study investigates the quality and variability of teacher-child interactions in relation to children’s social competence in Finnish toddler classrooms. The participants included 242 toddlers (114 girls, 128 boys) and their teachers (N= 42). The quality of teacher-child interactions (i.e., emotional and behavioral support; engaged support for learning) was observed using the CLASS-Toddler observation instrument (La Paro et al., 2012), and the average amount of within-day variability was calculated from the observed cycles. Teachers rated toddler’s social competence with the Multisource Assessment of Social Competence Scale (MASCS; Junttila et al., 2006) in relation to the toddler…
Análisis 3D de la aceleración en crol en el dominio temporal y frecuencial
2012
El Estudio hace un repaso a las metodologías usadas por diferentes autores en lo que respecta al análisis, tanto frecuencia como temporal del nado a crol. El estilo libre (nado en crol) en natación, al igual que el resto de estilos (braza, espalda, mariposa) poseen una determinada coordinación para realizarse correctamente según la reglamentación vigente (FINA, 2011). En este trabajo se pretende indagar en los movimientos que se realizan en el estilo crol, principalmente las aceleraciones y desaceleraciones que se producen durante la fase de nado en el cuerpo del nadador que afectan al rendimiento. Se podría definir el término Aceleración como "toda variación de velocidad con respecto al ti…
Indagini sulla variazione fenotipica in ambienti insulari e microinsulari delle specie di Podarcis Wagler, 1820 (Reptilia, Lacertidae) presenti in Si…
2011
The Effect of Predator Population Dynamics on Batesian Mimicry Complexes.
2022
Understanding Batesian mimicry is a classic problem in evolutionary biology. In Batesian mimicry, a defended species (the model) is mimicked by an undefended species (the mimic). Prior theories have emphasized the role of predator behavior and learning as well as evolution in model-mimic complexes but have not examined the role of population dynamics in potentially governing the relative abundances and even persistence of model-mimic systems. Here, we examined the effect of the population dynamics of predators and alternative prey on the prevalence of warning-signaling prey composed of models and mimics. Using optimal foraging theory and signal detection theory, we found that the inclusion …
The impact of life stage and pigment source on the evolution of novel warning signal traits
2021
Our understanding of how novel warning color traits evolve in natural populations is largely based on studies of reproductive stages and organisms with endogenously produced pigmentation. In these systems, genetic drift is often required for novel alleles to overcome strong purifying selection stemming from frequency-dependent predation and positive assortative mating. Here, we integrate data from field surveys, predation experiments, population genomics, and phenotypic correlations to explain the origin and maintenance of geographic variation in a diet-based larval pigmentation trait in the redheaded pine sawfly (Neodiprion lecontei), a pine-feeding hymenopteran. Although our experiments c…
Diversity in warning coloration: selective paradox or the norm?
2019
Aposematic theory has historically predicted that predators should select for warning signals to converge on a single form, as a result of frequency-dependent learning. However, widespread variation in warning signals is observed across closely related species, populations and, most problematically for evolutionary biologists, among individuals in the same population. Recent research has yielded an increased awareness of this diversity, challenging the paradigm of signal monomorphy in aposematic animals. Here we provide a comprehensive synthesis of these disparate lines of investigation, identifying within them three broad classes of explanation for variation in aposematic warning signals: …