Effect of the Mechanism Transfer Function on the Positioning Law

Parametric synthesis of mechanical system consisting of actuator, transfer mechanism and control device is considered. Planar and spatial mechanisms with one degree of freedom can be included in the system. Mechanism structure and the type of the actuator are considered to be given preliminary.     Keywords: synthesis, mechanism, drive, contro

Properties of the Resonance Lambda(1520) as seen in the Forward Electroproduction at JLab Hall A

High-resolution spectrometer measurements of the reaction H(e,e' K+)X at small Q2 are used to extract the mass and width of the Lambda(1520). We investigate dependence of the resonance parameters on different parametrizations of the background and the resonance peak itself. Our final values for the Breit-Wigner parameters are M=1520.4+-0.6(stat)+-1.5(syst) MeV and Gamma=18.6+-1.9(stat)+-1(syst) MeV. The width appears to be more sensitive to the assumptions than the mass. We also estimate, for the first time, the pole position for this resonance and find that both the pole mass and width seem to be smaller than their Breit-Wigner values.Comment: 4 pages, 1 figure, to appear in the proceedings of MENU 201

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

The Polarized H and D Atomic Beam Source for ANKE at COSY-J\"ulich

A polarized atomic beam source was developed for the polarized internal storage-cell gas target at the magnet spectrometer ANKE of COSY-J\"ulich. The intensities of the beams injected into the storage cell, measured with a compression tube, are $7.5\cdot 10^{16}$ hydrogen atoms/s (two hyperfine states) and $3.9\cdot 10^{16}$ deuterium atoms/s (three hyperfine states). For the hydrogen beam the achieved vector polarizations are $p_{\rm z}\approx\pm0.92$. For the deuterium beam, the obtained combinations of vector and tensor ($p_{\rm zz}$) polarizations are $p_{\rm z}\approx\pm 0.90$ (with a constant $p_{\rm zz}\approx +0.86$), and $p_{\rm zz}=+0.90$ or $p_{\rm zz}=-1.71$ (both with vanishing $p_{\rm z}$). The paper includes a detailed technical description of the apparatus and of the investigations performed during the development.Comment: 18 pages, 26 figures, 4 table

A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab

A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maximum achieved green power at 5 W IR pump power is 1.74 W with a total conversion efficiency of 34.8\%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7~kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7\%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0\% precision in polarization measurements of an electron beam with energy and current of 1.0~GeV and 50~$\mu$A.Comment: 20 pages, 22 figures, revised version of arXiv:1601.00251v1, submitted to NIM

A Pair Polarimeter for Linearly Polarized High Energy Photons

A high quality beam of linearly polarized photons of several GeV will become available with the coherent bremsstrahlung technique at JLab. We have developed a polarimeter which requires about two meters of the beam line, has an analyzing power of 20% and an efficiency of 0.02%. The layout and first results of a polarimeter test on the laser back-scattering photon beam at SPring-8/LEPS are presented

24 segment high field permanent sextupole magnets

We report on the design, construction, and magnetic field measurements of a system of high field sextupole magnets made from NdFeB compounds. The magnets are utilized as a focusing system for neutral hydrogen (or deuterium) atoms in a polarized atomic beam source based on Stern-Gerlach spin separation. Each magnet consists of 24 segments of permanently magnetized material differing in remanence and coercivity to reduce demagnetization. According to quadratic extrapolation to the pole tip the magnetic flux density reaches values of up to B-0=1.69 T. Three-dimensional field calculations using the MAFIA code were carried out to optimize the magnet performance and to avoid demagnetization by selecting appropriate materials for the individual segments. Measurements of the radial, azimuthal, and longitudinal magnetic flux density distributions were carried out by means of a small Hall probe (100x200x15 mu m(3)). The measurements with the small probe permitted to extract experimentally higher order multipole components very close (similar to 100 mu m) to the inner surface. Experimental values obtained are compared to predictions based on MAFIA calculations and on the Halbach formalism. (C) 2000 American Institute of Physics. [S0034-6748(00)05309-0]

BURNOUT SYNDROME IN ANESTHESIOLOGISTS AND INTENSIVE CARE PHYSICIANS

The survey involved 130 anesthesiologists in the cities of Irkutsk and Ulan-Ude with the use of the MBI questionnaire - version for health professionals in adaptation of N.E. Vodopyanova allowed to study the prevalence and severity of various components of burnout syndrome (BOS). Sings of BOS were identified in doctors of young age; they most widely manifested as intense emotional exhaustion and depersonalization. Symptoms of emotional exhaustion begin to appear from the beginning of work and reach their maximum in the age group of 36-40 years, making 28 (24-32) score. Depersonalization as one of emotional burnout syndrome manifestations had a high level of 17 (15-19) points in 93 % of doctors aged from 35 to 45years. The most significant level of personal achievements reduction was noted in the age groups from 30 to 40 years (the average level - 32 (30-36) points). The resulting research data show that the daily work activity of anaesthesiologists causes significant professional harm and involves high responsibility, greater amount of work performed, working late shifts, which manifest themselves in the formation of personality deformation and development of the "stress associated with the difficulties of maintaining a normal lifestyle"

Current opportunities and prospectives of immunotropic therapy in chronic generalized periodontitis

Impairment of immunological reactivity in inflammatory periodontal diseases is well proven. To perform immunomodulatory treatment in domestic dental practice, various medications are used, including natural, chemically modified, recombinant, genetically engineered and synthetic substances, which differ in their effects upon innate and adaptive immune systems. Complex preparations of natural cytokines as well as genetically engineered preparations of IL-1, IL-2, growth factors, IFNα, IFNβ, IFNγ are applied in clinical settings. Clinical implementation of interferon and interferon inducers in combined therapy of generalized periodontitis is shown to increase resistance to viral components of the oral microbiota. Growth factors (platelet growth factor, fibroblast growth factor, endothelial growth factor, etc.) are successfully used for tissue regeneration in periodontics and maxillofacial surgery. Experimental studies have shown that local administration of toll-like receptor-9 and CD40 ligand may reduce periodontal ligature inflammation and bone loss in mice by inducing B-cell proliferation and increasing IL-10 mRNA expression. Promising results in development of new biologically active drugs are obtained with nanotechnology approaches, i.e., production of composite materials of metal nanoparticles with polymers, growth factors, and local application of these products. General limitations of all these growth factors include extremely short periods of biological activity, and adjusted duration of local effective concentrations. Therefore, it is important to develop a drug delivery system using appropriate scaffolding elements thus allowing local effects of the drug for a certain period of time. In experimental models, alginate hydrogels performed well upon local delivery of granulocyte-macrophage colony-stimulating factor and stromal lymphopoietin of the thymus. A new immunomodulatory strategy for alveolar bone regeneration targets macrophages. A biologically functionalized injectable microsphere of heparin-modified gelatin nanofibers that mimic the architecture of the natural bone extracellular matrix, and provide an osteoconductive microenvironment for bone cells includes IL-4, which has heparin-binding domains. These medications represent a component of a comprehensive treatment schedule, and should be evaluated for immune status before and after therapy. Thus, recent advances in studies of innate and acquired immune responses in inflammatory diseases and, in particular, in periodontal disorders, allows us to develop new approaches and methods of treatment in order to improve efficiency of complex therapy in the inflammatory periodontal diseases

First results of site testing program at Mt. Shatdzhatmaz in 2007 - 2009

We present the first results of the site testing performed at Mt.~Shatdzhatmaz at Northern Caucasus, where the new Sternberg astronomical institute 2.5-m telescope will be installed. An automatic site monitor instrumentation and functionality are described together with the methods of measurement of the basic astroclimate and weather parameters. The clear night sky time derived on the basis of 2006 -- 2009 data amounts to 1340 hours per year. Principle attention is given to the measurement of the optical turbulence altitude distribution which is the most important characteristic affecting optical telescopes performance. For the period from November 2007 to October 2009 more than 85\,000 turbulence profiles were collected using the combined MASS/DIMM instrument. The statistical properties of turbulent atmosphere above the summit are derived and the median values for seeing $\beta_0 = 0.93$~arcsec and free-atmosphere seeing $\beta_{free} = 0.51$~arcsec are determined. Together with the estimations of isoplanatic angle $\theta_0 = 2.07$~arcsec and time constant \tau_0 = 2.58 \mbox{ ms}, these are the first representative results obtained for Russian sites which are necessary for development of modern astronomical observation techniques like adaptive optics.Comment: Accepted for publication in MNRAS, 17 pages, 15 figure