The assessment of caesium-137 accumulation in parts of fungi fruiting bodies of Leccinum aurantiacum (Bull.) Gray in a mixed spruce-aspen forest on sod-podzolic soil was carried out. Average specific ...activity of cesium-137 for caps is 1814±112 Bq/kg and for stems 873±73 Bq/kg. It was found that the specific activity of cesium-137 does not exceed the permissible values, but significantly differs between the cap and stem of fruit bodies. The coefficients of cesium-137 accumulation from soil vary for caps from 4.6 to 6.1 and for stems from 1.7 to 2.8. High specific activity of cesium-137 in aspen leaf fall 289±27 Bq/kg and litter 339±23 Bq/kg compared to the underlying soil horizons was noted.
Preoperative planning for the treatment of the consequences of diseases and injuries of the spino-pelvic complex surgical treatment is a mandatory procedure and should ensure the selection of ...implants, modes and techniques for their installation, as well as the reconstruction of the optimal biomechanics of the operated segment. For each individual patient, the surgeon chooses a treatment variant based on his qualitative and quantitative individual parameters. Therefore, the task of developing some measurable characteristics (criteria) seems to be urgent, with the help of which it would be possible to choose a successful variant for each specific patient. In surgery of the spino-pelvic complex pathologies, it is customary to use questionnaires of the patient's quality of life to assess the long-term treatment results. During preoperative planning, surgeons also calculate geometric parameters to assess the degree of deformity and select the necessary correction. At the same time, a geometrically and anatomically correctly planned operation may not be successful in terms of assessing the strength of implanted structures and the "bone-implant" system as a whole. This paper presents the results of the development and testing of criteria for assessing the success of surgical reconstructive treatment of the consequences of the spino-pelvic complex diseases and injuries. Three groups of criteria have been identified: geometric, biomechanical, and clinical. Geometric and biomechanical criteria make it possible to obtain short-term postoperative prognosis. The use of clinical success criteria makes it possible to formulate long-term postoperative prognosis. The criteria for assessing success do not offer the surgeon any new treatment variant, but only provide a tool for quantitative comparison of the treatment variants that are considered by him and the choice of successful ones among them. The criteria for evaluating the success of treatment are implemented in the Smart Plan Ortho preoperative planning system developed at Saratov University, which provides a full cycle of preoperative planning in accordance with the planning-modeling-forecast methodology.
A
bstract
We consider within QCD collinear factorization the inclusive process
p
+
p
→
h
1
+
h
2
+
X
, where the pair of identified hadrons,
h
1
, h
2
, having large transverse momenta is produced in ...high-energy proton-proton collisions. In particular, we concentrate on the kinematics where the two identified hadrons in the final state are separated by a large interval of rapidity Δ
y
. In this case the (calculable) hard part of the reaction receives large higher order corrections ∼
. We provide a theoretical input for the resummation of such contributions with next-to-leading logarithmic accuracy (NLA) in the BFKL approach. Specifically, we calculate in NLA the vertex (impact-factor) for the inclusive production of the identified hadron. This process has much in common with the widely discussed Mueller-Navelet jets production and can be also used to access the BFKL dynamics at proton colliders. Another application of the obtained identified-hadron vertex could be the NLA BFKL description of inclusive forward hadron production in DIS.
The mechanical behaviour of 3D woven composite materials is affected by deformations as resulting from the manufacturing process. The present study is based on comparison of three different ...methodologies to predict the internal yarn geometries of 3D through-thickness orthogonal interlock. The first approach idealises the geometry, which is obtained directly from manufacturing parameters assuming constant elliptical cross-sections. The second technique generates the yarn geometry from the Digital Element Method, which simulates the compaction process of the material. The last method considered is an analytical method defining longitudinal and transverse contours, which describe the undulation of fill, warp and binder yarns. The yarn geometries from the different methods are numerically analysed using voxel finite element analysis to determine the global volume fraction and the elastic properties. The results are also compared with experimental values to determine the strengths and weaknesses of each approach. The first approach is quicker than the others although the geometry is not the most accurate. The second and third method have a good match between the predicted geometry and optical micrograph of the fabric and the elastic properties are very similar for both methods.
In this paper we report a clustering analysis of upper main-sequence stars in the Small Magellanic Cloud, using data from the VMC survey (the VISTA near-infrared YJKs survey of the Magellanic ...system). Young stellar structures are identified as surface overdensities on a range of significance levels. They are found to be organized in a hierarchical pattern, such that larger structures at lower significance levels contain smaller ones at higher significance levels. They have very irregular morphologies, with a perimeter-area dimension of 1.44 0.02 for their projected boundaries. They have a power-law mass-size relation, power-law size/mass distributions, and a log-normal surface density distribution. We derive a projected fractal dimension of 1.48 0.03 from the mass-size relation, or of 1.4 0.1 from the size distribution, reflecting significant lumpiness of the young stellar structures. These properties are remarkably similar to those of a turbulent interstellar medium, supporting a scenario of hierarchical star formation regulated by supersonic turbulence.
In this paper, we propose an implementation of a honeypot system that uses a method of dynamic resource management based on a graph of potential attacks to provide the ability to deploy a virtual ...network infrastructure of any scale. Its resource consumption is compared with the traditional honeypot system.
ABSTRACT The "VISTA near-infrared YJKs survey of the Magellanic Clouds System" (VMC) is collecting deep Ks-band time-series photometry of pulsating variable stars hosted by the two Magellanic Clouds ...and their connecting Bridge. In this paper, we present Y, J, Ks light curves for a sample of 4172 Small Magellanic Cloud (SMC) Classical Cepheids (CCs). These data, complemented with literature V values, allowed us to construct a variety of period-luminosity (PL), period-luminosity-color (PLC), and period-Wesenheit (PW) relationships, which are valid for Fundamental (F), First Overtone (FO), and Second Overtone (SO) pulsators. The relations involving the V, J, Ks bands are in agreement with their counterparts in the literature. As for the Y band, to our knowledge, we present the first CC PL, PW, and PLC relations ever derived using this filter. We also present the first near-infrared PL, PW, and PLC relations for SO pulsators to date. We used PW(V, Ks) to estimate the relative SMC-LMC distance and, in turn, the absolute distance to the SMC. For the former quantity, we find a value of Δμ = 0.55 ± 0.04 mag, which is in rather good agreement with other evaluations based on CCs, but significantly larger than the results obtained from older population II distance indicators. This discrepancy might be due to the different geometric distributions of young and old tracers in both Clouds. As for the absolute distance to the SMC, our best estimates are μSMC = 19.01 ± 0.05 mag and μSMC = 19.04 ± 0.06 mag, based on two distance measurements to the LMC which rely on accurate CC and eclipsing Cepheid binary data, respectively.
Abstract EX Lupi, a low-mass young stellar object, went into an accretion-driven outburst in 2022 March. The outburst caused a sudden phase change of ∼112° ± 5° in periodically oscillating multiband ...lightcurves. Our high-resolution spectra obtained with the High Resolution Spectrograph (HRS) on board the Southern African Large Telescope also revealed a consistent phase change in the periodically varying radial velocities (RVs), along with an increase in the RV amplitude of various emission lines. The phase change and increase in RV amplitude morphologically translates to a change in the azimuthal and latitudinal location of the accretion hotspot over the stellar surface, which indicates a reconfiguration of the accretion funnel geometry. Our three-dimensional magnetohydrodynamic simulations reproduce the phase change for EX Lupi. To explain the observations, we explored the possibility of forward shifting of the dipolar accretion funnel as well as the possibility of the emergence of a new accretion funnel. During the outburst, we also found evidence of the hotspot’s morphology extending azimuthally asymmetrically with a leading hot edge and cold tail along the stellar rotation. Further, our high-cadence photometry showed that the accretion flow has clumps. We also detected possible clumpy accretion events in the HRS spectra that showed episodically highly blueshifted wings in the Ca ii IR triplet and Balmer H lines.
The paper presents a multi-disciplinary decentralized integrated modeling approach (DIMA) for comprehensive modeling production and logistics networks. The DIMA allows the implementing of the ...principle of throughout modeling 'conceptual model → mathematical model → software'. In the paper, the DIMA is illustrated on the problem of collaborative network (CN) dynamical synthesis and reconfiguration. This problem is described in a comprehensive way on the conceptual and mathematical levels. This description allows interlinking synthesis and analysis issues of CN planning and control taking into account system elements' activity, uncertainty factors, and structure dynamics. The paper reports a novel approach for comprehensive multi-disciplinary modeling distributed large-scale business systems with decentralized decision-making and control. In this paper, the main features of the DIMA are summarized based on recently developed partial models and algorithms for a large spectrum of CN management issues.
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