SYNOVIAL CYST IN THE PROJECTION OF TIBIAL TUNNEL AFTER ACL RECONSTRUCTION (CASE REPORT)

ACL  tears  are the  most  widespread  lesions  among  isolated  trauma  of knee  ligaments  that  require  early  surgical treatment especially in young active patients. There  are various ACL reconstruction techniques where femur and tibia tunnels are formed and graft is fixed by cannulated interference screws. One of the possible complications is the formation of a postoperative soft tissue cyst in the projection of tibial tunnel.  The nature  as well as mechanism of cyst formation  is still unclear.A relevant  clinical case of cyst formation  in a patient five years after ACL grating  is described  in this publication. MRI findings demonstrated that  the origin of the cyst was hole of the tibial interference screw.Conclusion. The authors  observed that  synovial cyst was formed due to use of cannulated interference screws where synovial  fluid was leaking  from joint  cavity  through screw holes. Cystectomy and  autografting of tibial  bone tunnel allowed to reduce such complication

The "Horizon-T" Experiment: Extensive Air Showers Detection

Horizon-T is an innovative detector system constructed to study Extensive Air Showers (EAS) in the energy range above 10^16 eV coming from a wide range of zenith angles (0 - 85 degrees). The system is located at Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above the sea level. It consists of eight charged particle detection points separated by the distance up to one kilometer as well as optical detector subsystem to view the Vavilov-Cerenkov light from the EAS. The time resolution of charged particles and Vavilov-Cerenkov light photons passage of the detector system is a few ns. This level of resolution allows conducting research of atmospheric development of individual EAS.Comment: Initial technical note for Horizon-T experiment, updated with recent detector upgrades, 11/2016. Updated 12/2017 with minor edits. Large upgrade will be in another articl

Measurement of tensor analyzing powers in deuteron photodisintegration

New accurate measurement of tensor analyzing powers T20, T21 and T22 in deuteron photodisintegration has been performed. Wide-aperture non-magnetic detectors allowed to cover broad kinematic ranges in a single setup: photon energy = 25 to 600 MeV, proton emission angle in CM = 24 to 48 deg. and 70 to 102 deg. New data provide a significant improvement of a few existing measurements. The angular dependency of the tensor asymmetries in deuteron photodisintegration is extracted for the first time.Comment: 4 pages, 5 figures, submitted to Phys. Rev. Let

Influence of small businesses on the competitive development of the Volga Federal District regions

© 2016 Taylor & Francis Group, London.The article examines the impact of small businesses on the main indicators of the development of Volga Federal District (VFD) regions for the period from the year 2002 to 2012. As a result, the regression analysis has statistically revealed a significant association between the indicators of small business development and the performance of the VFD

Mössbauer study of structurally ordered iron coordination compounds and polyurethanes crosslinked by them

The structure of a metal-complex system based on ferric chloride and monoethanolamine and the products of interaction of this system with ε-caprolactam and a urethane prepolymer was studied by Mössbauer spectroscopy. It was found that iron ions in the coordination compounds of interest are linked with one another in a chain structure via chloride bridges. The columnar structure of metal complexes, the presence of magnetic ordering in these complexes below 70 K, and the feasibility of formation of metal complexes ordered in the same manner in a flexible-chain polymer matrix containing electron-donating groups were revealed. © Pleiades Publishing, Inc., 2006

Photostimulated phenomena in relaxors

The action of illumination on the conducting and dielectric properties of lead magnoniobate was investigated. The photostimulated currents were examined and the spectral dependence of photoconductivity in the region of diffuse phase transition was obtained. It was found that the illumination affects the dielectric properties and that its action is memorized at temperatures below room temperature. The role of defect states in the formation of relaxor properties is discussed on the basis of the obtained data. © 2003 MAIK "Nauka/Interperiodica"

Modeling of traffic flows with due regard to ecological criteria

The article deals with issues of ensuring the reliable and safe city transport system operation through the use of the rational management methods. To make evidence-based management decisions are encouraged to use worked out intelligent decision support system. It is shown that a comprehensive solution of the city transport system management contributes to the sustainable development of the region

Debye formulas for a relaxing system with memory

Rate (master) equations are ubiquitous in statistical physics, yet, to the best of our knowledge, a rate equation with memory has previously never been considered. We write down an integro-differential rate equation for the evolution of a thermally relaxing system with memory. For concreteness we adopt as a model a single-domain magnetic particle driven by a small ac field and derive the modified Debye formulas. For any memory time Θ the in-phase component of the resultant ac susceptibility is positive at small probing frequencies ω, but becomes negative at large ω. The system thus exhibits frequency induced diamagnetism. For comparison we also consider particle pairs with dipolar coupling. The memory effect is found to be enhanced by ferromagnetic coupling and suppressed by antiferromagnetic coupling. Numerical calculations support the prediction of a negative susceptibility which arises from a phase shift induced by the memory effect. It is proposed that the onset of frequency induced diamagnetism represents a viable experimental signature of correlated noise