Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe_{4})_{2}I.

We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe_{4})_{2}I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a 0.11 THz amplitude mode derived primarily from a transverse acoustic mode of the high-symmetry structure.

Quasi-One-Dimensional Transition-Metal Chalcogenide Semiconductor (NbSeI)I.

The discovery of new low-dimensional transition-metal chalcogenides is contributing to the already prosperous family of these materials. In this study, needle-shaped single crystals of a quasi-one-dimensional (1D) material, (NbSeI)I, were grown by chemical vapor transport, and the structure was solved by single-crystal X-ray diffraction (XRD). The structure has 1D (NbSeI) chains along the [101] direction, with two I ions per formula unit directly bonded to Nb.

Magnetic structure and spin waves in the frustrated ferro-antiferromagnet PbVO(PO).

Single crystal neutron diffraction, inelastic neutron scattering, and electron spin resonance experiments are used to study the magnetic structure and spin waves in PbVO(PO), a prototypical layered 12 ferromagnet with frustrating next-nearest neighbor antiferromagnetic interactions. The observed excitation spectrum is found to be inconsistent with a simple square lattice model previously proposed for this material. At least four distinct exchange coupling constants are required to reproduce the measured spin wave dispersion.

[Can we improve the general and nutritional management of elderly individuals living at a medical-social facility? A team work].

Can we improve comprehensive care of old people's home residents? Working in an interdisciplinary health network, health professionals tried to better answer the real needs of residents. Malnutrition is is highly prevalent in this population. We showed that it is possible to improve health care of these patients by better organizing meals with a more enriched protein content provided a better involvement in the process of every caring team member.

[Incidence of intramural digestive system hematoma in anticoagulation. Epidemiologic study and clinical aspects of 59 cases observed in Switzerland (1970-1975)].

Intramural hematoma of the small intestine is a relatively rare but serious complication of oral anticoagulant therapy. On the basis of a retrospective epidemiological survey the authors estimate its incidence at 1 case per 20 000 admissions to medical and surgical services or 1 case per 2500 anticoagulated patients per year. The classical trial of clinical symptoms comprises abdominal pain, small bowel obstruction and multiple hemorrhagic symptoms (hematuria, hematomas, ecchymoses, hematemesis and melaena).