Primordial tensor modes from quantum corrected inflation

We analyze quantum corrections on the naive $\phi^4$-Inflation. These typically lead to an inflaton potential which carries a non-integer power of the field. We consider both minimal and non-minimal couplings to gravity. For the latter case we also study unitarity of inflaton-inflaton scattering. Finally we confront these theories with the Planck and BICEP2 data. We demonstrate that the discovery of primordial tensor modes by BICEP2 require the presence of sizable quantum departures from the $\phi^4$-Inflaton model for the non-minimally coupled scenario which we parametrize and quantify. We compare the results with the minimally coupled case and elucidate the main distinctive features.Comment: 11 pages, 3 figures We updated the paper to reflect the new constraints on tensor modes from the BICEP2 experiment. This is reflected in the modified title and throughout the paper by updating the constrains on the allowed quantum correction

Inflation from Asymptotically Safe Theories

We investigate models in which inflation is driven by an ultraviolet safe and interacting scalar sector stemming from a new class of nonsupersymmetric gauge field theories. These new theories, differently from generic scalar models, are well defined to arbitrary short distances because of the existence of a controllable ultraviolet interacting fixed point. The scalar couplings at the ultraviolet fixed point and their overall running are predicted by the geometric structure of the underlying theory. We analyse the minimal and non-minimal coupling to gravity of these theories and the consequences for inflation. In the minimal coupling case the theory requires large non-perturbative quantum corrections to the quantum potential for the theory to agree with data, while in the non- minimal coupling case the perturbative regime in the couplings of the theory is preferred. Requiring the theory to reproduce the observed amplitude of density perturbations constrain the geometric data of the theory such as the number of colors and flavors for generic values of the non-minimal coupling.Comment: 6 pages, 6 figure

X-ray Lines from Dark Matter: The Good, The Bad, and The Unlikely

We consider three classes of dark matter (DM) models to account for the recently observed 3.5 keV line: metastable excited state DM, annihilating DM, and decaying DM. We study two examples of metastable excited state DM. The first, millicharged composite DM, has both inelasticity and photon emission built in, but with a very constrained parameter space. In the second example, up-scattering and decay come from separate sectors and is thus less constrained. The decay of the excited state can potentially be detectable at direct detection experiments. However we find that CMB constraints are at the border of excluding this as an interpretation of the DAMA signal. The annihilating DM interpretation of the X-ray line is found to be in tension with CMB constraints. Lastly, a generalized version of decaying DM can account for the data with a lifetime exceeding the age of the Universe for masses $\lesssim 10^{6}$ GeV.Comment: 14 pages, 4 figures; updated to match JCAP published versio

Moderne markedskommunikasjon, forbrukerkritikk og likes.

Denne oppgaven tar med utgangspunkt i Phillip Kotlers markedsføringsteorier og Thorolf Helgesens teorier om markedskommunikasjon for seg hvilke kriterier som ligger til grunn for avvik i oppslutning på Facebook mellom DNB og Nordea. Vi vil gjennom oppgaven komme med teoretiske antakelser på hvorfor dette skillet eksisterer, som vi vil bekrefte/avkrefte gjennom et casedesign der vi analyser fem dybdeintervju gjennomført hos bedriftene. Avhandlingen starter med en redegjørelse av Facebook, tradisjonell markedsføring, kunderelatert markedsføring, markedskommunikasjon og Co-Creation. Disse temaene vil være sentrale for forståelse av situasjonen mellom DNB og Nordea og verdien av Facebook som markedskommunikasjonskanal for bedrifter generelt. Videre vil vi presentere metodevalgene gjort til denne oppgaven før vi presentere våre funn i henhold til de teoretiske antakelser og forskningsspørsmål som fremlegges i oppgaven. Vi vil så drøfte relabilitet, intern validitet, ekstern validitet og objektivitet før vi kommer med vår endelige konklusjon på oppgaven. Avslutningsvis kommer vi med anbefalinger til videreforskning. Gjennom oppgaven har vi påvist hvordan økonomisk satsingsvilje og ansatte dedikert til sosial medier er de to kriteriene som er opphav til skillet i oppslutning og aktivitet på Facebook hos DNB og Nordea

Hepatic p-nitrophenetole O-deethylation Activity in Mice depends on Diet Composition

The present study investigated effects of various commercial diets, of protein and of fat 1evels in semisynthetic diets, and of fiber content and type on hepatic O-deethylation of p-nitrophenetole in mice. A high fat content increased and a high fiber content decreased the hepatic p-nitrophenetole O-deethylation activity. The activity in mice kept on different commercial feedings differed significantly. The level of hepatic microsomal cytochrome P-450 activity affects the toxicity of many compounds. Thus, standardization of commercial feeds for experimental animals used in toxicological and pharmacological studies is needed to avoid the potential risk of misleading conclusions