Detection Statistics of Pulse Signals at Declinations from +42o+42^o to +52o+52^o at the Frequency 111 MHz

A search for pulse signals was carried out in a new sky area included in the monitoring program for the search for pulsars and transients. Processing of several months data recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, 4 pulses per hour are observed in each of the 24 connected stationary beams. Of these pulses, 18.3% are similar to those of pulsars. They are visible in one or two neighboring beams and have a pronounced dispersion shift, that is, they are recorded first at a high and then at a low frequency, which indicates the possible passage of the signal through the interstellar medium. Almost 68% of such detected pulses belong to six known pulsars with dispersion measures from 9 to 141 $pc/cm^3$, and almost all of the remaining pulses are either noise of an unknown nature or artifacts of the proposed pulse separation technique. An additional study of the selected array of 3650 obvious pulsar pulses revealed 13 pulses belonging to four rotating radio transients (RRATs). Their dispersion measures are in the range of 17-51 $pc/cm^3$. A search for regular (periodic) RRAT emission was carried out using power spectra summed over 121 days. Periodic radiation was not detected, but for two RRATs, upper estimates of the periods were obtained from measurements of the time intervals between pulses. The upper estimates of the integrated flux density of the detected RRATs are in the range 2-4 mJy at the frequency 111 MHz.Comment: published in Astronomy Report, translated by Yandex translator with correction of scientific lexis, 6 pages, 3 figures, 2 table

Detection of two new RRATs at 111 MHz

A search for pulse signals in a area with declinations of +52\degr <\delta <+55\degr was carried out on the LPA LPI radio telescope. When processing ten months of observations recorded in six frequency channels with a channel width of 415 kHz and a total bandwidth of 2.5 MHz, 22 thousand events were found with a pronounced dispersion delay of signals over frequency channels, i.e. having signs of pulsar pulses. It turned out that the found pulses belong to four known pulsars and two new rotating radio transients (RRATs). An additional pulse search conducted in 32-channel data with a channel width of 78 kHz revealed 8 pulses for the transient J0249+52 and 7 pulses for the transient J0744+55. Periodic radiation of transients was not detected. The analysis of observations shows that the found RRATs are most likely pulsars with nullings, where the proportion of nulling is greater than 99.9\%.Comment: published in Astronomy Reports, translated by Yandex translator with correction of scientific lexis, 5 pages, 2 figures, 1 tabl

Sun-Sized Water Vapor Masers in Cepheus A

We present the first VLBI observations of a Galactic water maser (in Chepeus A) made with a very long baseline interferometric array involving the RadioAstron Earth-orbiting satellite station as one of its elements. We detected two distinct components at -16.9 and 0.6 km/s with a fringe spacing of 66 microarcseconds. In total power, the 0.6 km/s component appears to be a single Gaussian component of strength 580 Jy and width of 0.7 km/s. Single-telescope monitoring showed that its lifetime was only 8~months. The absence of a Zeeman pattern implies the longitudinal magnetic field component is weaker than 120 mG. The space-Earth cross power spectrum shows two unresolved components smaller than 15 microarcseconds, corresponding to a linear scale of 1.6 x 10^11 cm, about the diameter of the Sun, for a distance of 700 pc, separated by 0.54 km/s in velocity and by 160 +/-35 microarcseconds in angle. This is the smallest angular structure ever observed in a Galactic maser. The brightness temperatures are greater than 2 x 10^14K, and the line widths are 0.5 km/s. Most of the flux (about 87%) is contained in a halo of angular size of 400 +/- 150 microarcseconds. This structure is associated with the compact HII region HW3diii. We have probably picked up the most prominent peaks in the angular size range of our interferometer. We discuss three dynamical models: (1) Keplerian motion around a central object, (2) two chance overlapping clouds, and (3) vortices caused by flow around an obstacle (i.e., von Karman vortex street) with Strouhal number of about~0.3.Comment: 15 pages, 9 figures. Accepted for publication in ApJ, February 16, 201

Status of UCN Source at WWR-M Reactor

The WWR-M reactor at PNPI is going to be equipped with an ultacold neutron source of high density. Method of UCN production is based on their accumulation in the super fluid helium due to particular qualities of that quantum liquid. The possibility of maintaining the temperature T = 1.371K with a thermal load of P = 60W was shown experimentally, while the theoretical load is expected to be P=30W. The project envisages the installation on UCN beams the experimental setups of various research projects such as searching for the nEDM, measure the neutron lifetime, and the observation of neutron to antineutron oscillation. In addition to UCN beams, three beams of cold and verycold neutrons are planned. Six experimental setups will be installed on these beams. At present, a vacuum container of the UCN source has been manufactured and the manufacture of low-temperature deuterium and helium parts of the source has been started

Using Laser Point Scanning Thermography for Quality Monitoring of Products Made of Composite Materials

Introduction. Control of the presence of subsurface defects in products from composite materials is necessary for verification of products after release from production and in the process of operation. Aim of the Study. The purpose of the presented work is to estimate the parameters of subsurface defects using local laser thermography, suitable for quality control of both small objects and suspicious areas of large objects with curved surfaces. Materials and Methods. The laboratory setup on which this work was carried out includes a robotic arm, a COX CG640 thermal imager and a 3 W laser. The method was tested on a fiberglass sample with introduced delamination defect simulations located at different depths below the surface. By means of computer modeling rational parameters of thermographic control were selected, providing reliable detection of the defect at a depth of up to 3 mm under the surface of the composite sample. Results. Numerical modeling of surface temperature field induced by moving focused laser beam was carried out using COMSOL software package. It showed that laser beam with 3 W power moving at 5 mm/s provided the thermal contrast sufficient to detect the defects at the depth up to 3 mm. The obtained experimental data are in satisfactory agreement with numerical modeling both qualitatively and quantitatively. Experimental data were used to construct a regression model for determining defect depth based on the maximal thermal contrast and the time interval between heating and the contrast maximum. Discussion and Conclusion. The results obtained in this work allow us to propose a technique for detecting defects in fiberglass plastics and estimating their depth. The coefficient of determination for the obtained regression model was found to be equal to 0.95, and the mean square error of the metric was no more than 0.016 mm2. The use of a robotic arm to scan objects will make it possible to investigate objects with complex curved surfaces

Assessment of the nutritive status in cancer patients of the palliative care department

Objective: to assess the prevalence of trophic insufficiency in palliative care cancer patientsЦель работы — провести оценку распространенности трофологической недостаточности у онкологических больных паллиативного профиля

Indicators of the psychoemotional state of palliative polymorbid cancer patients

The aim of the study was to assess the psychoemotional state of polymorbid palliative cancer patientsЦель исследования — провести оценку психоэмоционального состояния полиморбидных паллиативных онкологических пациенто

Ассоциация злокачественных новообразований и нарушения трофологического статуса у пациентов паллиативного профиля

Malnutrition is one of the most common disorders observed in patients who are being treated for various diseases. In cancer patients with a palliative profile, compared with patients without malignant neoplasms, anemia, lymphopenia, decreased glomerular filtration rate were significantly more often detected, and a tendency to lower albumin levels was revealed. There was a significant decrease in PNI, BMI, shoulder circumference, thickness of the skin‑fat fold of the scapula and shoulder, and a tendency to reduce lean body weight in patients with palliative malignancies. The logistic regression analysis revealed the relationship between the presence of a malignant tumor in palliative patients and the presence of trophic status disorders: PNI (β = –0.37, p = 0.021), weight (β = –0.41, p = 0.001), BMI (β = –0.36, p = 0.001), shoulder circumference (β =–0.65, p = 0.001), thickness of the scapular skin‑fat fold (β = –0.66, p = 0.001).Недостаточное питание относится к одним из наиболее распространенных нарушений, отмечающихся у пациентов, находящихся на лечении по поводу различных заболеваний. У онкологических пациентов паллиативного профиля в сравнении с пациентами без злокачественных новообразований достоверно чаще выявлялась анемия, лимфопения, снижение скорости клубочковой фильтрации, выявлена тенденция к более низкому уровню альбумина. Выявлено достоверное снижение показателя PNI (прогностический нутритивный индекс), индекса массы тела (ИМТ), окружности плеча, толщины кожно-жировой складки лопатки и плеча, тенденцию к снижению общей массы тела у пациентов со злокачественными новообразованиями паллиативного профиля. Проведение логистического регрессионного анализа выявило взаимосвязь между наличием злокачественной опухоли у пациентов паллиативного профиля и наличием нарушений трофологического статуса: PNI (β = –0,37, р = 0,021), вес (β = –0,41, р = 0,001), ИМТ (β = –0,36, р = 0,001), окружность плеча (β =–0,65, р = 0,001), толщина кожно-жировой складки лопатки (β =–0,66, р = 0,001)