Current driven tri-stable resistance states in magnetic point contacts.

Point contacts between normal and ferromagnetic metals are investigated using magnetoresistance and transport spectroscopy measurements combined with micromagnetic simulations. Pronounced hysteresis in the point contact resistance versus both bias current and external magnetic field are observed. It is found that such hysteretic resistance can exhibit, in addition to bi-stable resistance states found in ordinary spin valves, tri-stable resistance states with a middle resistance level.

Surface spin-valve effect.

We report an observation of spin-valve-like hysteresis within a few atomic layers at a ferromagnetic interface. We use phonon spectroscopy of nanometer-sized point contacts as an in situ probe to study the mechanism of the effect. Distinctive energy phonon peaks for contacts with dissimilar nonmagnetic outer electrodes allow localizing the observed spin switching to the top or bottom interfaces for nanometer thin ferromagnetic layers.

Spectroscopy of phonons and spin torques in magnetic point contacts.

Phonon spectroscopy is used to investigate the mechanism of current-induced spin torques in nonmagnetic/ferromagnetic (N/F) point contacts. Magnetization excitations observed in the magneto-conductance of the point contacts are pronounced for diffusive and thermal contacts, where the electrons experience significant scattering in the contact region. We find no magnetic excitations in highly ballistic contacts.

[Emergency care for infectious disease patients].

Urgent critical condition during acute course of infectious diseases can be developed in early terms and suddenly with fast irreversible changes in vital organs and systems. In connection with generality of pathogenesis of many groups of infectious diseases the critical conditions characterized by stereotyped clinical syndromes. They include infective toxic shock, infective toxic encephalopathy and cerebral hypertension, acute dehydration, acute respiratory, cardiac, hepatic, adrenal and renal insufficiency.

[The diagnostic and treatment characteristics of El Tor cholera and its combinations with other infectious diseases in an outbreak of multiple intestinal infection].

The article summarizes the experience of diagnosis and treatment of El Tor cholera in servicemen during an outbreak of intestinal polyinfection in the conditions of dry hot climate in desert and mountainous terrain of Afghanistan. The authors describe the clinical course of El Tor cholera which is stipulated by the mixed character of dehydration, polymorphism of clinical symptoms and more severe forms of concomitant infections.

[Characteristics of chemotherapy of infectious diseases associated with gunshot wounds and trauma].

The experience in treating infectious diseases in wounded and traumatized persons from the contingent of the Soviet Troops in ++Afghanistan is described. The syndrome of the joint effect of the injury and infection is characterized. Features of the chemotherapy of the injured patients with viral hepatitis, malaria, typhoid fever and enteric and ++extra-enteric amebiasis under the ecological and professional stress and with an account of the etiology of the wound infection are presented.