Search results for "SAW"
showing 4 items of 204 documents
Phenomenology of low-scale Seesaw Models
2016
All the observed particles are well accommodated in the Standard Model, together with the basic forces. However, there are both experimental and theoretical hints that the Standard Model can not be a complete theory and that New Physics is needed. Some of the theoretical problems are: i) The flavor-puzzle, i.e., why are there three copies of particles differing only by their mass. Most of the free parameters in the Standard Model are linked to this puzzle. They have been measured, but their values do not follow any clear pattern and their origin remains elusive. ii) The strong CP problem, that is, why the CP symmetry is conserved in the strong interactions in the Standard Model, which is no…
Do videowikis on the web support better (constructivist) learning in the basics of information systems science?
2012
This paper describes the combination of a wiki and screen capture videos as a complementary addition to conventional lectures in an information management and information systems development course. Our basis was collaborative problem-based learning with the problems defined by students. The idea was that students were expected to find concepts or issues from four lecture themes which are not well-defined or clarified for them. The students worked in small groups of two or three students or they completed the coursework individually. First, the students selected the theme which was most unclear for them. Second, the students selected the problematic things from this area and created the pre…
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…
Comparison of the mycelial growth of some Phellinus spp. isolates on different agar media
2017
Celem pracy było określenie i porównanie wzrostu grzybni Phellinus spp. Użyto dziewięciu izolatów z gatunków: P. torulosus, P. robustus, P. pomaceus, P. igniarius i P. pini, które uprawiano na czterech różnych pożywkach agarowych, aby określić ich przydatność dla rodzaju Phellinus. Zastosowano pożywki: ziemniaczano-glukozową (PDA), maltozową (MEA), pszenną (WA) i trocinowo-pszenną (SWA). Po 10 dniach inkubacji w 25°C zmierzono średnice kolonii. Artykuł prezentuje dane dotyczące wzrostu grzybni (G) i krótkie opisy koloni na MEA. Wszystkie izolaty wykazały mały wzrost na MEA i duży wzrost na WA, SWA i PDA. Wzrost grzybni wszystkich izolatów na poszczególnych pożywkach wyniósł odpowiednio: MEA…