Reformulating Russia provides a thorough narratological and contextual analysis of Russian émigré historiography as it appears in Georgii Fedotov's Saints of Ancient Russia, Georgii Florovskii's The ...Ways of Russian Theology, Nikolai Berdiaev's The Russian Idea and Vasilii Zenkovskii's History of Russian Philosophy.
First-principles calculations were employed to examine the physical properties of the Full Heusler Nb2RuSi Alloy. The structural analysis unveiled the stability of the Full Heusler Nb2RuSi alloy in a ...non-magnetic state. Regarding electronic properties, the calculations of the total density of states and band structures demonstrated that this alloy exhibits not only non-magnetic but also metallic behaviors. In addition, the main factor that indicates the performance of thermoelectric properties is the power factor, it has been seen that this parameter increases sinusoidal and then decreases until reaching a zero value around the temperature of 300 K. This parameter increases linearly from the value of the temperature T = 340 K. finally, we have studied the influence of temperature and pressure on the thermodynamic properties of the Full Heusler Nb2RuSi alloy. The Debye temperature increases linearly with the strain. The Debye temperature decreases as the temperature increases. These results mean that introducing expansion stress can improve the thermal stability of the studied alloy.
•DFT method was applied to study physical properties of Nb2RuSi.•Optical properties of the compound Nb2RuSi have been discussed.•Thermo-electric properties of the Nb2RuSi material, have been presented.•The Electronic properties of the compound Nb2RuSi have been illustrated.•Thermodynamic properties of Nb2RuSi material have been studied and discussed.
It is commonly considered that myotonometry is a non-invasive method capable of quantifying linear elastic and viscoelastic properties of the myofascial tissue through the application of a weak ...mechanical impulse to the surface of the skin. However, before the impulse can reach the myofascial tissue, it must cross more superficial tissues such as the skin and subcutaneous tissue (ST). All these superficial tissues have different distributions and organizations of structural components. Therefore, the study aimed to examine the potential relationships between the mechanical and morphometric properties of various superficial soft tissues surrounding the lumbar multifidus muscle (LM).
Myotonometric measurements of dynamic stiffness, logarithmic decrement, and creep, and ultrasonographic measurements of thickness and echogenicity of cutaneous, subcutaneous, perimuscular tissue, and LM were obtained from 50 healthy individuals in the resting prone position and during contralateral arm lift.
The most important findings were that in both the relaxed and contracted LM state, the dynamic stiffness strongly negatively (
= -0.69;
< 0.001 in relaxation,
= -0.83;
< 0.001 in contraction) and creep strongly positively (
= 0.79;
< 0.001 in relaxation,
= 0.85;
< 0.001 in contraction) correlated with the thicknesses of the ST. Similar but weaker correlations were noticed between both these measures and the perimuscular tissue thickness. Elasticity was uncorrelated to the thicknesses of the tissues. With LM contraction (change from the relaxed to contracted state), the relative increase in dynamic stiffness was correlated with the relative decrease in dermis (
= -0.51;
< 0.001) and ST (
= -0.47;
= 0.001) thickness, and with the relative increase in LM (
= 0.36;
= 0.010) thickness. Moreover, the relative decrease (thinning) in the ST thickness was correlated with the relative increase in logarithmic decrement (i.e., decrease in soft tissue elasticity,
= -0.37,
= 0.011). The mechanical properties of the soft tissues were not related to their echogenicity.
In conclusion, the thicker the subcutaneous and perimuscular layers, the lesser the stiffness and the greater the time-dependent deformation to the external force of the tissues surrounding the LM during its relaxation and isometric contraction. Moreover, the greater the thinning of the ST and the thickening of the LM during its contraction, the higher the increase in lumbosacral tissue stiffness and the decrease in elasticity. Therefore, one should consider the thickness of the ST before planning or analyzing the outcomes of myotonometric or other external biomechanical measurements to avoid drawing the wrong conclusions about the mechanical properties of the myofascial tissue.
Ewangelizacja Rusi Kijowskiej zaczęła się już za panowania księżnej Olgi, która przyjęła chrzest, według powszechnego poglądu, w Konstantynopolu. Jednakże rzeczywistym chrzcicielem Rusi był dopiero ...jej wnuk, książę Włodzimierz I Wielki. To on doprowadził do chrztu swe księstwo, ale nie zdołał wytrzebić z niego pogaństwa. Na decyzję o przyjęciu chrztu przez tego księcia bardziej jednak zdawały się wpływać czynniki polityczne niż religijne. Prestiż Rusi jako kraju chrześcijańskiego usiłowano podnieść, przypisując jej ewangelizację samemu apostołowi Andrzejowi. Z nim też, jak i z Mojżeszem, królami Dawidem i Salomonem oraz ze św. Pawłem i św. Jerzym porównywano księcia Włodzimierza, natomiast księżną Olgę ze św. Marią Magdaleną i św. Heleną, w obojgu widząc chrzcicieli Rusi. Okolicznościami najbardziej sprzyjającymi przyjęciu chrztu przez ruskiego władcę było udzielenie tego sakramentu księżnej Oldze, wcześniejsza znajomość chrześcijaństwa przez księcia Włodzimierza, a także obecność chrześcijan w jego drużynie. O tym traktuje niniejszy artykuł.
Purpose To examine the clinical effectiveness of scapular stability exercise on shoulder stability and rehabilitative ultrasound images in office workers. Subjects and Methods Thirty-eight subjects ...were randomly divided into a scapular stability exercise group (n=19) and a manual therapy group (n=19). Subjects in the scapular stability exercise group performed a scapular stability exercise designed to correct the abnormal location of the scapula, at 40 minutes per session, two times per week, for 6 weeks. Forward head horizontal distance, rounded shoulder posture, stability of the upper limb for the shoulder, and rehabilitative ultrasound images were evaluated before and after 6 weeks. Results After the intervention, both groups showed significantly decreased forward head horizontal distance and rounded shoulder posture, with significantly improved stability of the upper limb and rehabilitative ultrasound images. Forward head horizontal distance, rounded shoulder posture, stability of the upper limb, and rehabilitative ultrasound images showed greater improvements in the shoulder stability exercise group than in the manual therapy group. Conclusion Scapular stability exercise can improve shoulder stability and the thickness of the lower trapezius in rehabilitative ultrasound images of office workers, and could be useful in clinical rehabilitation.
First-principles calculations based on density functional theory and quasi-harmonic Debye model are used to investigate the high-pressure and high-temperature physical properties, including the ...lattice constant, magnetic moment, density of states, pressure-volume-temperature relationship, bulk modulus, thermal expansivity, heat capacity, and Grüneisen parameter for the new Mn-based full-Heusler alloy Mn2RuSi in CuHg2Ti-type structure. The optimized equilibrium lattice constant is consistent with experimental and other theoretical results. The calculated total spin magnetic moment remains an integral value of 2.0μB in the lattice constant range of 5.454–5.758Å, and then decreases very slowly with the decrease of lattice constant to 5.333Å. By the spin resolved density of states calculations, we have shown that Mn2RuSi compound presents half-metallic ferrimagnetic properties under the equilibrium lattice constant. The effects of temperature and pressure on bulk modulus, thermal expansivity, heat capacity, and Grüneisen parameter are opposite, which are consistent with a compression rate of volume. Furthermore, the results show that the effect of temperature is larger than pressure for heat capacity and the effect of high temperature and pressure on thermal expansion coefficient is small. All the properties of Mn2RuSi alloy are summarized in the pressure range of 0–100GPa and the temperature up to 1200K.
•High-pressure and high-temperature physical properties of Mn2RuSi were investigated.•Ferrimagnetic ground state has been confirmed in Mn2RuSi alloy.•The first-principle calculations and quasi-harmonic Debye model were used.•The pressure up to 100 GPa and the temperature up to 1200 K.
Nanoporous cobalt (NPCo) with three-dimensional network nanostructure was obtained by selectively dealloying Al from CoAl alloy in a mild alkaline solution. Co3O4 grew further on the surface of NPCo ...and then NPCo/Co3O4 was obtained. Gold nanoparticles functionalized NPCo/Co3O4 (NPCo/Co3O4–Au) was used to fabricate electrochemiluminescence (ECL) modified electrodes for detecting mycotoxin deoxynivalenol (DON). In addition the introduction of AuNPs enhanced the conductivity, and NPCo/Co3O4–Au exhibited excellent catalytic properties for the luminescence of RuSi@Ru(bpy)32+. The fabricated ECL modified electrodes exhibited a high activity for DON in a wide linear range from 5pg/mL to 100ng/mL with a low detection limit of 1pg/mL. The NPCo/Co3O4–Au based ECL modified electrodes displayed excellent stability and reproducibility, and successfully achieved the detection of DON in wheat flour with desirable results as well. The NPCo/Co3O4–Au possesses great application potential for ECL modified electrodes with sample detection, unique catalytic activity, and high structure stability.
•NPCo/Co3O4 synthesized by dealloying method was firstly used to fabricate ECL modified electrodes.•ECL modified electrodes based on NPCo/Co3O4−Au/RuSi@Ru(bpy)32+ was fabricated.•Single-step cycle pulse method was adopted to enhance stability of the sensor.•It owned ultrahigh sensitivity, good stability and high selectivity.
Core stability is a reference term for the performance of the deep trunk muscles, which provide functional stability of the lumbopelvic area and control the human body in static and dynamic ...positions.
The study group consisted of 30 patients between the age of 42 and 76 years (mean=61.4) after total hip arthroplasty (total hip replacement, Group I) and total knee arthroplasty (three-compartment arthroplasty with posterior stabilization of the implant - Group II). In 18 (60%) patients, hip endoprosthesis was performed, whereas in 12 (40%), three-compartment knee endoprosthesis with posterior stabilization has been implanted. In the study group, Rehabilitative Ultrasound Imaging (RUSI) of the transversus abdominis muscle thickness was conducted at rest and in contraction, the transversus abdominis activation ratio was specified, the SF-36 Life Quality Questionnaire was applied and a three-week treatment cycle was performed. The tests were carried out twice, i.e. before and after treatment.
In the group of patients after total hip replacement, the transversus abdominis (TrA) contraction ratio before the beginning of the exercise programme was 0.79±0.06, and after its completion 0.9 ±0.02. The observed difference was statistically significant at p<0.001. In the group of patients after three-compartment knee arthroplasty, the TrA contraction ratio before the beginning of the exercise programme was 0.78±0.09, and after its completion0 0.91±0.02. The difference of these values was statistically significant at the level of p<0.05. The results of the SF-36 questionnaire in both groups indicate improvement in physical functioning. The observed difference was statistically significant at p<0.001.
The performed three-week physiotherapy treatment in conjunction with deep muscle training increases the thickness of the TrA muscle during rest and contraction testing, and increases the transversus abdominis contraction ratio in Rehabilitative Ultrasound Imaging in the study groups. Furthermore, improvement in the level of physical functioning was observed within the studied groups.
Background: Chronic low back pain (LBP) has been stated as one of the main health concerns in the XXI century due to its high incidence. Objective: The objective of this study was to determine the ...effects of an 8-week program of hypopressive abdominal gymnastics (HAG) on inspiratory muscle strength, diaphragm thickness, disability and pain in patients suffering from non-specific chronic LBP. Methods: A total of 40 patients with chronic LBP were randomly divided into two groups. The experimental group carried out an 8-week supervised program of HAG (two sessions/week), whereas the control group did not receive any treatment. Outcomes were measured before and after the intervention, comprising diaphragm thickness during relaxed respiratory activity, maximal inspiratory pressure (PImax), pain intensity (NRS), pressure pain threshold and responses to four questionnaires: Physical Activity Questionnaire (PAQ), Roland–Morris Disability Questionnaire (RMQ), Central Sensitization Inventory (CSI) and Tampa Scale of Kinesiophobia-11 Items (TSK-11). Results: Statistically significant differences (p < 0.05) were observed for greater thickness of the left and right hemi-diaphragms at inspiration, as well as higher PImax and decreased NRS, CSI and RMQ scores in the intervention group. After treatment, the increases in the thickness of the left and right hemi-diaphragms at inspiration and PImax, as well as the decrease in the NRS and RMQ scores, were only predicted by the proposed intervention (R2 = 0.118–0.552). Conclusions: An 8-week HAG intervention seemed to show beneficial effects and predicted an increase in diaphragm thickness and strength during inspiration, as well as a reduction in pain intensity, central sensitization and disability, in patients suffering from chronic non-specific LBP with respect to non-intervention.
Nanoporous cobalt (NPCo) with three-dimensional network nanostructure was obtained by selectively dealloying Al from CoAl alloy in a mild alkaline solution. Co3O4 grew further on the surface of NPCo ...and then NPCo/Co3O4 was obtained. Gold nanoparticles functionalized NPCo/Co3O4 (NPCo/Co3O4-Au) was used to fabricate electrochemiluminescence (ECL) modified electrodes for detecting mycotoxin deoxynivalenol (DON). In addition the introduction of AuNPs enhanced the conductivity, and NPCo/Co3O4-Au exhibited excellent catalytic properties for the luminescence of RuSi@Ru(bpy)3(2+). The fabricated ECL modified electrodes exhibited a high activity for DON in a wide linear range from 5 pg/mL to 100 ng/mL with a low detection limit of 1 pg/mL. The NPCo/Co3O4-Au based ECL modified electrodes displayed excellent stability and reproducibility, and successfully achieved the detection of DON in wheat flour with desirable results as well. The NPCo/Co3O4-Au possesses great application potential for ECL modified electrodes with sample detection, unique catalytic activity, and high structure stability.
PDF
