91 research outputs found
Attractively bound pairs of atoms in the Bose-Hubbard model and antiferromagnetism
We consider a periodic lattice loaded with pairs of bosonic atoms tightly
bound to each other via strong attractive on-site interaction that exceeds the
inter-site tunneling rate. An ensemble of such lattice-dimers is accurately
described by an effective Hamiltonian of hard core bosons with strong
nearest-neighbor repulsion which is equivalent to the model with
Ising-like anisotropy. We calculate the ground-state phase diagram for a
one-dimensional system which exhibits incompressible phases, corresponding to
an empty and a fully filled lattice (ferromagnetic phases) and a half-filled
alternating density crystal (anti-ferromagnetic phase), separated from each
other by compressible phases. In a finite lattice the compressible phases show
characteristic oscillatory modulations on top of the anti-ferromagnetic density
profile and in density-density correlations. We derive a kink model which
provides simple quantitative explanation of these features. To describe the
long-range correlations of the system we employ the Luttinger liquid theory
with the relevant Luttinger parameter obtained exactly using the Bethe
Ansatz solution. We calculate the density-density as well as first-order
correlations and find excellent agreement with numerical results obtained with
density matrix renormalization group (DMRG) methods. We also present a
perturbative treatment of the system in higher dimensions.Comment: 10 pages, 9 figure
Bone sarcomas: ESMOâEURACANâGENTURISâERN PaedCan Clinical Practice Guideline for diagnosis, treatment and follow-up
Production costs have been covered by ESMO from central funds
Prevention of central venous catheter related infections with chlorhexidine gluconate impregnated wound dressings: a randomized controlled trial
Correction to: Two years later: Is the SARS-CoV-2 pandemic still having an impact on emergency surgery? An international cross-sectional survey among WSES members
Background: The SARS-CoV-2 pandemic is still ongoing and a major challenge for health care services worldwide. In the first WSES COVID-19 emergency surgery survey, a strong negative impact on emergency surgery (ES) had been described already early in the pandemic situation. However, the knowledge is limited about current effects of the pandemic on patient flow through emergency rooms, daily routine and decision making in ES as well as their changes over time during the last two pandemic years. This second WSES COVID-19 emergency surgery survey investigates the impact of the SARS-CoV-2 pandemic on ES during the course of the pandemic.
Methods: A web survey had been distributed to medical specialists in ES during a four-week period from January 2022, investigating the impact of the pandemic on patients and septic diseases both requiring ES, structural problems due to the pandemic and time-to-intervention in ES routine.
Results: 367 collaborators from 59 countries responded to the survey. The majority indicated that the pandemic still significantly impacts on treatment and outcome of surgical emergency patients (83.1% and 78.5%, respectively). As reasons, the collaborators reported decreased case load in ES (44.7%), but patients presenting with more prolonged and severe diseases, especially concerning perforated appendicitis (62.1%) and diverticulitis (57.5%). Otherwise, approximately 50% of the participants still observe a delay in time-to-intervention in ES compared with the situation before the pandemic. Relevant causes leading to enlarged time-to-intervention in ES during the pandemic are persistent problems with in-hospital logistics, lacks in medical staff as well as operating room and intensive care capacities during the pandemic. This leads not only to the need for triage or transferring of ES patients to other hospitals, reported by 64.0% and 48.8% of the collaborators, respectively, but also to paradigm shifts in treatment modalities to non-operative approaches reported by 67.3% of the participants, especially in uncomplicated appendicitis, cholecystitis and multiple-recurrent diverticulitis.
Conclusions: The SARS-CoV-2 pandemic still significantly impacts on care and outcome of patients in ES. Well-known problems with in-hospital logistics are not sufficiently resolved by now; however, medical staff shortages and reduced capacities have been dramatically aggravated over last two pandemic years
Parasite responses to pollution: what we know and where we go in âEnvironmental Parasitologyâ
Strafrecht BT: Rechtsfolgenlösung bei heimtĂŒckischer Tötung : StGB § 211 II Gr. 2 Var. 1 : BGH, Urt. v. 19.8.2020 - 5 StR 219/20, NStZ 2021, 105
Strafrecht BT: Qualifizierter gefĂ€hrlicher Eingriff in den StraĂenverkehr : StGB §§ 315 b, III Nr. 1 Buchst. a : Verkehrsspezifische Gefahr und Absicht zur HerbeifĂŒhrung eines UnglĂŒcksfalls bei Steinwurf von einer BrĂŒcke auf ein fahrendes Kfz : BGH, Urt. v. 9.12.2021 - 4 StR 167/21, NJW 2022, 409 mit Anm Krumm
Strafrecht BT: Anwendungsbereich des GeldwĂ€schetatbestands : StGB §§ 2 III, 261 II : das Vernichten eines aus einer rechtswidrigen Tat herrĂŒhrenden Gegenstandes ist keine taugliche GeldwĂ€schehandlung iSd § 261 STGB § 261 II StGB
Strafrecht BT: GewerbsmĂ€Ăiger Bandenbetrug - unseriöser SchlĂŒsselnotdienst : StGB §§ 25, II, 263 I, V : Geltendmachung einer ĂŒberhöhten Rechnung als Betrug : BGH, Urt. v. 16.1.2020 - 1 StR 113/19, NStZ-RR 2020, 213
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