42 research outputs found
Structural basis of genomic RNA (gRNA) dimerization and packaging determinants of mouse mammary tumor virus (MMTV)
Higgs field in cosmology
The accelerated expansion of the early universe is an integral part of modern
cosmology and dynamically realized by the mechanism of inflation. The simplest
theoretical description of the inflationary paradigm is based on the assumption
of an additional propagating scalar degree of freedom which drives inflation -
the inflaton. In most models of inflation the fundamental nature of the
inflaton remains unexplained. In the model of Higgs inflation, the inflaton is
identified with the Standard Model Higgs boson and connects cosmology with
elementary particle physics. A characteristic feature of this model is a
non-minimal coupling of the Higgs boson to gravity. I review and discuss
several phenomenological and fundamental aspects of this model, including the
impact of quantum corrections and the renormalization group, the derivation of
initial conditions for Higgs inflation in a quantum cosmological framework and
the classical and quantum equivalence of different field parametrizations.Comment: 36 pages, 9 figures; references added, typos corrected. Invited
contribution to the Heraeus-Seminar "Hundred Years of Gauge Theory", 30 July
- 3 August 2018, Physikzentrum Bad Honnef, organized by Silvia De Bianchi and
Claus Kiefer. To appear in the proceedings "100 Years of Gauge Theory. Past,
present and future perspectives" in the series `Fundamental Theories of
Physics' (Springer
Skin Necrosis with Oculomotor Nerve Palsy Due to a Hyaluronic Acid Filler Injection
Performing rhinoplasty using filler injections, which improve facial wrinkles or soft tissues, is relatively inexpensive. However, intravascular filler injections can cause severe complications, such as skin necrosis and visual loss. We describe a case of blepharoptosis and skin necrosis caused by augmentation rhinoplasty and we discuss the patient’s clinical progress. We describe the case of a 25-year-old female patient who experienced severe pain, blepharoptosis, and decreased visual acuity immediately after receiving a filler injection. Our case suggests that surgeons should be aware of nasal vascularity before performing an operation, and that they should avoid injecting fillers at a high pressure and/or in excessive amounts. Additionally, filler injections should be stopped if the patient complains of severe pain, and appropriate measures should be taken to prevent complications caused by intravascular filler injections