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Journal articles on the topic 'COP rotational component'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Zhi, Ruiping, Rui Ma, Delou Zhang, and Yuting Wu. "Experimental Research on a Lightweight Miniature Wankel Compressor for a Vapor Compression Refrigeration System in Aerospace." Sustainability 15, no. 11 (2023): 8826. http://dx.doi.org/10.3390/su15118826.

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Vapor compression refrigeration is considered one promising technology for dissipating much higher heat fluxes from electronic devices at lower temperatures. The compressor, one key component, has a great effect on the overall size and performance of the system. One lightweight, miniature, hermetic Wankel compressor was developed to solve limited space cooling problems. The assembled Wankel compressor had a diameter of 65 mm, a length of 85 mm and a weight of 340.2 g, without a motor and housing. An experimental system for miniature refrigeration was set up to explore the optimal refrigerant c

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2

Cau, Costantino, Alessandro Taras, Gabriele Masia, et al. "Structural Evolution of Olivine during Mechanochemically Assisted Mineral Carbonation under CO2 Flow." Inorganics 12, no. 10 (2024): 269. http://dx.doi.org/10.3390/inorganics12100269.

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The mechanism of the mechanically assisted mineral carbonation of commercial olivine under the flow of a carbon dioxide (CO2)/nitrogen (N2) mixture has been elucidated by ex situ powder X-ray diffraction and Fourier-transform infrared spectroscopy. The overall CO2 conversion depends on the rotational frequency of the mill’s engine, and it reaches 85% within 90 min of mechanical treatment at a flow rate of 2.5 L min−1. By tuning the frequency of rotation, the kinetics of CO2 conversion unveil a complex reaction pathway involving subsequent steps. Structural analyses suggest that clinochlore, a

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3

Volkov, I. M., A. S. Volkova, and L. A. Bagaev. "V839 Cep – a new quadruple doubly eclipsing system." Astronomičeskij žurnal 101, no. 9 (2024): 819–38. https://doi.org/10.31857/s0004629924090034.

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New high-precision photometric measurements of the eclipsing star V839 Cep (P = 9.96d, VA+B = 9.64m, e = 0.07, B6 V + B7 V), which is the “A” component of the visual double star J21035+5925AB, have established that component “B” is also an eclipsing variable (P = 4.075d, B9 V + G8 V). For component “A”, the apsidal rotation rate was measured to be ω˙obs=0.027°/year, which exceeds the theoretical value under the condition of synchronism ω˙theor=0.021°/year. The physical parameters of the component stars of the eclipsing pair “A” were obtained: T1 = 13 200 ± 300 K, M1 = (3.7 ± 0.15) M⊙, R1 = (2.

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Ospina-Zamudio, J., B. Lefloch, C. Ceccarelli, et al. "First hot corino detected around an isolated intermediate-mass protostar: Cep E-mm." Astronomy & Astrophysics 618 (October 2018): A145. http://dx.doi.org/10.1051/0004-6361/201832857.

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Context. Intermediate-mass (IM) protostars provide a bridge between the low- and high-mass protostars. Despite their relevance, little is known about their chemical diversity. Aims. We want to investigate the molecular richness towards the envelope of I-M protostars and to compare their properties with those of low- and high-mass sources. Methods. We have selected the isolated IM Class 0 protostar Cep E-mm to carry out an unbiased molecular survey with the IRAM 30 m telescope between 72 and 350 GHz with an angular resolution lying in the range 7–34″. Our goal is to obtain a census of the chemi

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Sergison, Darryl J., Tim Naylor, S. P. Littlefair, Cameron P. M. Bell, and C. D. H. Williams. "Characterizing the i-band variability of YSOs over six orders of magnitude in time-scale." Monthly Notices of the Royal Astronomical Society 491, no. 4 (2019): 5035–55. http://dx.doi.org/10.1093/mnras/stz3398.

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ABSTRACT We present an i-band photometric study of over 800 young stellar objects in the OB association Cep OB3b, which samples time-scales from one minute to 10 yr. Using structure functions we show that on all time-scales (τ) there is a monotonic decrease in variability from Class I to Class II through the transition disc (TD) systems to Class III, i.e. the more evolved systems are less variable. The Class Is show an approximately power-law increase (τ0.8) in variability from time-scales of a few minutes to 10 yr. The Class II, TDs, and Class III systems show a qualitatively different behavi

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6

Muhammad Arman, Kasni Sumeru, Andriyanto Setyawan, Luga Martin Simbolon, and Mohamad Firdaus Sukri. "Energy and Exergy Analysis of R600a as a Substitute for R134a in Automotive Air Conditioning System." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 119, no. 1 (2024): 105–16. http://dx.doi.org/10.37934/arfmts.119.1.105116.

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Until now, R134a is still used as a working fluid in automotive air conditioning (A/C) even though it has a very high global warming potential (GWP), which is 1430. Refrigerant R600a is an alternative working fluid as a substitute for R134a in automotive (A/C). This environmentally friendly substitute refrigerant is also expected to produce a better system performance, for which it is necessary to analyse energy and exergy. During work, each AC component generates friction, heat loss, and pressure drop which causes irreversibility in each component. The irreversible quantity of each component

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7

Arumugasamy, Prakash, and Dipanjan Mitra. "Evaluating the evidence of multipolar surface magnetic field in PSR J0108–1431." Monthly Notices of the Royal Astronomical Society 489, no. 4 (2019): 4589–605. http://dx.doi.org/10.1093/mnras/stz2299.

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ABSTRACT PSR J0108–1431 is an old pulsar where the X-ray emission is expected to have a thermal component from the polar cap and a non-thermal component from the magnetosphere. Although the phase-integrated spectra are fit best with a single non-thermal component modelled with a power law (PL) of photon index Γ = 2.9, the X-ray pulse profiles do show the presence of phase-separated thermal and non-thermal components. The spectrum extracted from half the rotational phase away from the X-ray peak fits well with either a single blackbody (BB) or a neutron star atmosphere (NA) model, whereas the s

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8

NEKRASENKO, L. A. "TAX INCENTIVES TO MANAGE LAND AS A NATURAL ASSET." Economic innovations 24, no. 1(82) (2022): 122–29. http://dx.doi.org/10.31520/ei.2022.24.1(82).122-129.

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Topicality. Successful economic development of agriculture is one of the components of Ukraine's sustainable development. But this development very often leads to changes in natural and climatic conditions and to increased risks for doing business. Agricultural land is a natural asset and it should be taken into account that the change oflandscapes from natural vegetation to any other use can lead to loss, degradation, and fragmentation of the environment, all of which can have devastating consequences for biodiversity as a source of ecosystem services. Therefore, it is important to find ways

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9

Rizki, Muliawan, Septyansah, Khakim Nur, YP Bowo, Falahuddin F. MA, and Azmy Ilham. "THE EFFECT OF VARIATIONS SPEED OF THE CONDENSER FAN WITH CONTROL FREQUENCY INVERTER ON THE ICE SLUSH MACHINE APPLICATION." AUSTENIT 14, no. 2 (2022): 86–94. https://doi.org/10.5281/zenodo.7265888.

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<em>The condenser is one of the main components in the ice slush machine system that functions to removed heat from the system to the environment. In this system, the condenser is equipped with a fan whose rotation speed is modified using an inverter that aims to determine the system performance and condenser capacity at each fan rotation variation of the ice slush machine. There are 3 variations of frequency settings in this system 50 Hz, 40 Hz, and 30 Hz, with equivalent velocity air 3.6, 2.9, and 1.9 m/s respectively. In this study, the performance of the ice slush machine with various cond

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10

Asgharifard-Sharabiani, P., A. Hannaneh, and M. Nikkhah-Bahrami. "Calculation of helical gear’s basic parameters using COP-data acquired by optical 3D digitizer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 12 (2011): 2953–62. http://dx.doi.org/10.1177/0954406211409841.

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Gears are industrial components with a precise geometry. Identification of their basic parameters plays an important role in their reverse design and quality control process. This article describes a new approach for the calculation of helical gear’s basic parameters using optical data acquired by 3D digitizer. This approach is implemented by acquiring cloud-of-points data (COP-data) from the bearing seats and gear tooth surface. Cylinder surface fitting through COP-data acquired from bearing seats is performed for the determination of gear axis of rotation. In a final step, involute helicoid

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11

Basu, Rahul, Dipanjan Mitra, and George I. Melikidze. "Estimating the Evolution of Sparks in the Partially Screened Gap of Pulsars from Subpulse Drifting." Astrophysical Journal 947, no. 2 (2023): 86. http://dx.doi.org/10.3847/1538-4357/acc6c6.

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Abstract A novel scheme has been developed to show that the observed phase behavior associated with subpulse drifting from two pulsars, J1034−3224 and J1720−2933, can be used to obtain the magnetic field configuration in the partially screened gap (PSG). The outflowing plasma along the open magnetic field line region of pulsars is generated as a result of spark discharges in an inner acceleration region (IAR) above the polar cap. The IAR has been modeled as a PSG with a steady supply of positively charged ions emitted from the heated polar cap surface dominated by strong non-dipolar magnetic f

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12

Bahri, Samsul. "Torque and Power Consumption of Paddlewheel Aerator With Movable Blade." Malikussaleh Journal of Mechanical Science and Technology 3, no. 2 (2015): 6. http://dx.doi.org/10.29103/mjmst.v3i2.10897.

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The development of movable blade is based on fact that power is required only when blade of paddle wheel aerator entering water and in contrary action of aeration effect only when the blade is about leaving the water. This study was carrier out to design and simulate paddle wheel aerator with movable blade which will open when entering water and close when leaving water. Wheel closed at quadrant I to IV (entering water surface) and was about to open at quadrant III to II (leaving water surface). The blade was designed referring to commonly used Taiwan wheel type. The component of mobable blade

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13

Raushan, Rakesh, and R. Chaubey. "Qualitative study of anisotropic cosmological models with dark sector coupling." Canadian Journal of Physics 95, no. 11 (2017): 1049–61. http://dx.doi.org/10.1139/cjp-2017-0088.

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In this paper, we study the dynamical evolution of locally rotationally symmetric (LRS) Bianchi type I cosmological model with coupling of dark sector. We investigate the phase-plane analysis when dark energy is modelled as exponential quintessence, and is coupled to dark energy matter via linear coupling between both dark components. The evolution of cosmological solutions is studied by using dynamical systems techniques. Stability and viability issues for three different physically viable linear couplings between both dark components are presented and discussed in detail.

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14

Kozyreva, V. S., F. B. Khamrakulov, O. А. Burkhonov, A. I. Bogomazov, and B. L. Satovskiy. "Rotation of the apsidal line in the eclipsing system V1059 Cep." Астрономический журнал 101, no. 2 (2024): 101–10. http://dx.doi.org/10.31857/s0004629924020048.

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Three light curves of the V1059 Cep eclipsing binary obtained in 2012, 2013 and 2021 were analyzed. We found the rapid apsidal motion in this system at the ratedw/dt= 7.2°per year. Assuming the equality of observed and theoretical apsidal motion rates we estimated physical characteristics of the components based on the data on their temperatures from the literature. According to our calculations the components are two very similar stars of the B7 V–B7.5 V spectral type with masses≈(3.4 ± 0.3)M⊙and age 180 ± 30 million years.

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15

Othman, Mohamed I. A., and Ibrahim A. Abbas. "Effect of rotation on plane waves in generalized thermomicrostretch elastic solid: comparison of different theories using finite element method." Canadian Journal of Physics 92, no. 10 (2014): 1269–77. http://dx.doi.org/10.1139/cjp-2013-0482.

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The present investigation is aimed at studying the effect of rotation on the thermomicrostretch elastic solid. The formulation is applied in the context of the generalized thermoelasticity Lord–Şhulman theory with one relaxation time and Green–Lindsay’s theory with two relaxation times, as well as the classical dynamical coupled theory. The problem has been solved numerically using a finite element method. Numerical results for the temperature distribution, the displacement components, the force stresses, the couple stresses, and the microstress distribution are represented graphically. The re

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16

Othman, Mohamed I. A., Magda E. M. Zidan, and Mohamed I. M. Hilal. "Effect of magnetic field on a rotating thermoelastic medium with voids under thermal loading due to laser pulse with energy dissipation." Canadian Journal of Physics 92, no. 11 (2014): 1359–71. http://dx.doi.org/10.1139/cjp-2013-0689.

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This investigation deals with the rotation of magneto-thermoelastic solid with voids subjected to thermal loading due to laser pulse. The bounding plane surface is heated by a non-Gaussian laser beam. The entire porous medium is rotated with a uniform angular velocity. The problem is studied in the context of Green–Naghdi (GN) theory of types II and III, with the effect of rotation, magnetic field, thermal loading and voids. Normal mode analysis is used to solve the physical problem to obtain the exact expressions for the displacement components, stresses, temperature distribution, and change

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17

Curtin, D., H. Wang, F. Selles, C. A. Campbell, and R. P. Zentner. "Soil fertility effects on carbon fluxes under two spring wheat rotations in a semiarid agroecosystem." Canadian Journal of Soil Science 82, no. 2 (2002): 155–63. http://dx.doi.org/10.4141/s01-038.

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Changes in soil C storage due to management practices are important in relation to soil quality and to the broader issue of atmospheric C sequestration. Our objective was to evaluate the effects of soil fertility management on C fluxes under two spring wheat (Triticum aestivum L.) rotations in semiarid southwestern Saskatchewan, i.e., continuous wheat (Cont W) and a rotation that included summerfallow every third year (F-W-W). Continuous wheat was grown under two fertility regimes since initiation of the experiment in 1967, i.e., fertilization with N+P (no nutrient limitation) or with P only.

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18

Akramieh, Elham, and Antonio Giuffrida. "Assessment of closed cycles operating with supercritical CO₂ as bottoming of small combustion turbines." Journal of Physics: Conference Series 2385, no. 1 (2022): 012106. http://dx.doi.org/10.1088/1742-6596/2385/1/012106.

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Abstract This work investigates the performance of supercritical CO2 power cycles bottoming small combustion turbines. As a matter of fact, the maximum power output of the topping cycle is limited to 10 MW, since there is a great number of commercial combustion turbine units for which the conventional combined cycle architecture with a bottoming steam power plant is not convenient. In detail, the partial heating cycle is the layout chosen for this study according to the interesting trade-off between heat recovery and cycle efficiency, with a limited number of components. Considering the invest

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19

Volkov, I. M., S. A. Naroenkov, and A. S. Kravtsova. "V957 Cep is a Zero-Age Eclipsing System." Astronomičeskij žurnal 101, no. 5 (2024): 436–54. https://doi.org/10.31857/s0004629924050044.

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New high-precision photometric measurements of the V957 Cep system (P = 1.99d, V = 11.17m, e = 0.127, B6 V+B8 V), as well as an integrated approach to orbital parameters determining based both on photometric solutions of the light curves and on the study of the course of residual deviations of the minima timings from the linear formula O – C made it possible for the first time to accurately measure the apsidal motion rate: ω˙obs= 2.91°/year, which coincided with the theoretical value under the condition of the orbital and axial rotations synchronism:ω˙theor = 2.92°/year. The physical parameter

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20

Othman, Mohamed I. A., W. M. Hasona, and Elsayed M. Abd-Elaziz. "The effect of rotation on the problem of fiber-reinforced under generalized magnetothermoelasticity subject to thermal loading due to laser pulse: a comparison of different theories." Canadian Journal of Physics 92, no. 9 (2014): 1002–15. http://dx.doi.org/10.1139/cjp-2013-0321.

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In the present paper, we introduce the coupled theory, Lord–Schulman theory, and Green–Lindsay theory to study the influences of a magnetic field and rotation on a two-dimensional problem of fiber-reinforced thermoelasticity subject to thermal loading by a laser pulse. The material is a homogeneous isotropic elastic half-space and is heated by a non-Gaussian laser beam with pulse duration of 8 ps. The method applied here is to use normal mode analysis to solve a thermal shock problem. Deformation of a body depends on the nature of the force applied as well as the type of boundary conditions. N

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21

Magnago, Letícia Mayara, Marina Donária Chaves Arantes, Graziela Baptista Vidaurre, Jordão Cabral Moulin, and Paulo Fernando Trugilho. "ENERGY ESTIMATE AND CARBON STOCK IN SHORT-ROTATION EUCALYPTUS STANDS." CERNE 22, no. 4 (2016): 527–34. http://dx.doi.org/10.1590/01047760201622042209.

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ABSTRACT The use of biomass as an alternative energy source has been gaining attention because of its energy characteristics and environmental contribution and because it is renewable in short production periods. The aim of the present study was to evaluate the biomass production and carbon sequestration of eucalyptus grown under different conditions. The basic density of the wood, stem volume with and without bark and dry biomass, accumulated carbon, assimilated carbon dioxide and estimated energy for each shoot component were determined for two hybrid clones of E. grandis x E. urophylla at 6

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22

Kim, Dokyu, Yongju Jeong, In Woo Son, and Jeong Ik Lee. "A New Windage Loss Model for S-CO2 Turbomachinery Design." Applied Sciences 13, no. 13 (2023): 7463. http://dx.doi.org/10.3390/app13137463.

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A supercritical CO2 (S-CO2) Brayton cycle is a compact and simple power conversion system with competitive efficiency. However, the strong real gas effects of S-CO2 pose challenges to the design of a cycle and its components. In particular, designing turbomachinery for expansion and compression processes has to accurately reflect real gas effects. Windage loss is one of the major losses that affects the motor load and heat generation in turbomachinery. The windage loss has a substantial impact on the overall turbomachinery efficiency especially in an S-CO2 power cycle since the windage loss is

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23

Muliawan, Rizki, Septyansah Septyansah, Nur Khakim, Bowo YP, MA Falahuddin F, and Ilham Azmy. "THE EFFECT OF VARIATIONS SPEED OF THE CONDENSER FAN WITH CONTROL FREQUENCY INVERTER ON THE ICE SLUSH MACHINE APPLICATION." AUSTENIT 14, no. 2 (2022): 86–94. http://dx.doi.org/10.53893/austenit.v14i2.4955.

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The condenser is one of the main components in the ice slush machine system that functions to removed heat from the system to the environment. In this system, the condenser is equipped with a fan whose rotation speed is modified using an inverter that aims to determine the system performance and condenser capacity at each fan rotation variation of the ice slush machine. There are 3 variations of frequency settings in this system 50 Hz, 40 Hz, and 30 Hz, with equivalent velocity air 3.6, 2.9, and 1.9 m/s respectively. In this study, the performance of the ice slush machine with various condense

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24

Saha, Bijan. "Spinor field in Bianchi type-IX space–time." Canadian Journal of Physics 96, no. 10 (2018): 1074–84. http://dx.doi.org/10.1139/cjp-2017-0711.

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Within the scope of Bianchi type-IX cosmological model we have studied the role of spinor field in the evolution of the Universe. It is found that unlike the diagonal Bianchi models in this case the components of energy–momentum tensor of spinor field along the principal axis are not the same (i.e., [Formula: see text]), even in the absence of spinor field nonlinearity. The presence of nontrivial non-diagonal components of energy–momentum tensor of the spinor field imposes severe restrictions both on geometry of space–time and on the spinor field itself. As a result the space–time turns out to

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25

Aslan, Fadik, Laurent Langlois, Philippe Mangin, and Tudor Balan. "Identification of Drilling Parameters during the Flow Drill Screw Driving Process." Key Engineering Materials 767 (April 2018): 465–71. http://dx.doi.org/10.4028/www.scientific.net/kem.767.465.

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The automobile manufacturing industry, until recent years, has been using steel for car body components and the main method for joining these components has always been Resistance Spot Welding. However, since the global trends toward CO2 reduction and resource efficiency have significantly increased, the importance and usage of lightweight materials has enhanced as well. New lightweight materials such as aluminum and magnesium alloys, carbon-fiber-reinforced plastics, etc., have become a reality, thanks to the new fastening technologies. Flow drill screw driving (FDS) is a one–sided thermomech

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26

Jaskulska, Iwona, Kestutis Romaneckas, Dariusz Jaskulski, and Piotr Wojewódzki. "A Strip-Till One-Pass System as a Component of Conservation Agriculture." Agronomy 10, no. 12 (2020): 2015. http://dx.doi.org/10.3390/agronomy10122015.

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Conservation agriculture has three main pillars, i.e., minimum tillage, permanent soil cover, and crop rotation. Covering the soil surface with plant residues and minimum mechanical soil disturbance can all result from introducing a strip-till one-pass (ST-OP) system. The aim of this study was to determine the impact of the ST-OP technology on the management of plant residues, soil properties, inputs, and emissions related to crop cultivation. We compared the effect of a ST-OP system against conventional tillage (CT) using a plough, and against reduced, non-ploughing tillage (RT). Four field e

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Rigoselli, Michela, and Sandro Mereghetti. "A new X-ray look into four old pulsars." Astronomy & Astrophysics 615 (July 2018): A73. http://dx.doi.org/10.1051/0004-6361/201732408.

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We report on the X-ray properties of four rotation-powered pulsars with characteristic ages in the range 0.3–5 Myr, derived from the analysis of XMM–Newton archival observations. We found convincing evidence of thermal emission only in the phase-averaged spectrum of PSR B0114+58, which is well fitted by a blackbody with temperature kT = 0.17 ± 0.02 keV and emitting radius R = 405+110−90 m, consistent with the size of its polar cap. The three other considered pulsars, PSR B0628−28, PSR B0919+06, and PSR B1133+16, have phase-averaged spectra that can be described well by single power laws with p

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Mallama, A., T. A. Clark, and J. W. Ryan. "Consistency of CDP and IRIS VLBI Earth orientation results." Symposium - International Astronomical Union 128 (1988): 187–92. http://dx.doi.org/10.1017/s0074180900119473.

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This study compares the earth orientation results obtained by the NASA CDP and the NGS IRIS experiments. The results agree at about one combined formal error (two milliarcseconds) after small biases (one to three milliarcseconds) have been removed from each component. Furthermore the biases are found to correspond to small rotations between the reference frames, principally the terrestrial frame, for the two sets of experiments. In the past the CDP data has not been used in combined solutions of earth orientation parameters prepared by the data centers at the U.S.N.O. and the B.I.H. The author

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Xie, Liangtao, Jianguo Yang, Nao Hu, Yu Fan, and Sicong Sun. "Structural optimization of S-CO₂ Brayton cycle compressor impeller based on evolutionary algorithm." Journal of Physics: Conference Series 2707, no. 1 (2024): 012003. http://dx.doi.org/10.1088/1742-6596/2707/1/012003.

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Abstract As the critical components for marine low-speed diesel engine flue gas waste heat recovery (WHR) supercritical carbon dioxide (S-CO2) Brayton cycle system, the structure of the compressor impeller is optimized by the evolutionary algorithm (EA) based on the co-simulation of the CAESES, ANSYS CFX and Opti Slang. The law of impeller pressure ratio, efficiency and power consumption in S-CO2 Brayton cycle (SCBC) as a function of rotational speed, inlet temperature, pressure and impeller structural parameters are revealed, and the method of improving SCBC efficiency for marine low-speed di

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30

Saha, Bijan. "Spinor field with polynomial nonlinearity in LRS Bianchi type-I space–time." Canadian Journal of Physics 94, no. 1 (2016): 116–21. http://dx.doi.org/10.1139/cjp-2015-0574.

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Within the scope of the locally rotationally symmetric (LRS) Bianchi type-I cosmological model the role of spinor field on the evolution of the Universe is investigated. In doing so, we have considered a polynomial type of nonlinearity. It is found that, depending on the sign of the self-coupling constant, the model allows either an accelerated mode of expansion or an oscillatory mode of evolution. While the non-diagonal components of the energy–momentum tensor of the spinor field in the case of a full Bianchi type-I model lead to the vanishing mass and nonlinear term in the spinor field Lagra

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31

Yamamoto, Kazuhiro, and Yuya Matsuura. "New Methanation Reactor by Reciprocating Engine (MeRE)." New Energy Exploitation and Application 3, no. 2 (2024): 269–77. https://doi.org/10.54963/neea.v3i2.328.

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Methanation, which synthesizes methane from carbon dioxide and hydrogen, can potentially be an important core technology for realizing a carbon-neutral society. A catalyst is normally used in the methanation process, but its thermal degradation is a serious problem. Thus, we have proposed a catalyst-free methanation reactor that simulates an internal combustion engine. We call it a Methanation Reciprocating Engine (MeRE), where the up-and-down motion of the piston inside the engine creates a high-temperature, high-pressure field inside the reactor that is suitable for the methanation reaction.

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32

Kite, Geoff. "Analysing Hydrometeorological Time Series for Evidence of Climatic Change." Hydrology Research 24, no. 2-3 (1993): 135–50. http://dx.doi.org/10.2166/nh.1993.0018.

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Considerable scientific attention has been focused on a measured increase in atmospheric CO2 and a suspected corresponding change in climate. Such a change in climate, if it occurred, might be expected to have a magnified effect on hydrologic time series and, indeed, projections have been made of major changes in water resources. If the climatic changes are indeed magnified in hydrologic time series then, by detecting trends in such series, it should be possible to work backwards and identify the causative climatic change. This paper looks at two data sets: 1) long-term temperature, precipitat

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Miao, Xiao‐Gui, Wooil M. Moon, and B. Milkereit. "A multioffset, three‐component VSP study in the Sudbury Basin." GEOPHYSICS 60, no. 2 (1995): 341–53. http://dx.doi.org/10.1190/1.1443770.

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A multioffset, three‐component vertical seismic profiling (VSP) experiment was carried out in the Sudbury Basin, Ontario, as a part of the LITHOPROBE Sudbury Transect. The main objectives were determination of the shallow velocity structure in the middle of the Sudbury Basin, development of an effective VSP data processing flow, correlation of the VSP survey results with the surface seismic reflection data, and demonstration of the usefulness of the VSP method in a crystalline rock environment. The VSP data processing steps included rotation of the horizontal component data, traveltime inversi

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Herzog, Johanna, Florian Göttfert, Christian Maurer-Grubinger, et al. "Improvement of cervical spine mobility and stance stability by wearing a custom-made mandibular splint in male recreational athletes." PLOS ONE 17, no. 12 (2022): e0278063. http://dx.doi.org/10.1371/journal.pone.0278063.

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Objectives The range of motion (ROM) of the cervical spine and postural stability are important for an economical and motorically adequate adaptation of the body to any situation. Therefore, this study aims to analyze whether these two components of postural and movement control can be influenced by means of a splint in a centric position compared to habitual occlusion. Methods 38 recreational male athletes volunteered. Cervical spine ROM was recorded using an ultrasound system and the a pressure measuring plate for postural stability (length of center of pressure (CoP) movement, area of CoP).

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Galasyuk, I. N., and O. V. Mitina. "The Interaction of the Parent with the Young Child: Structure and Dynamics of Parental Responsiveness." Cultural-Historical Psychology 16, no. 4 (2020): 72–86. http://dx.doi.org/10.17759/chp.2020160408.

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The article presents a theoretical justification of the concept of Parental Responsiveness (PR) based on the cultural and historical concept, the activity paradigm and the results of an empirical study, the purpose of which is to operationalize the psychological construct of parental responsiveness and build an explanatory model of the dynamic functioning of parental responsiveness. The study involved 55 mothers with children between the ages of 2.4 and 3.3 years, developing within the norm. The method "Evaluation of child-parent interaction (ECPI)", which provides video surveillance, was used

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Tokarek, Travis W., Charles A. Odame-Ankrah, Jennifer A. Huo, et al. "Principal component analysis of summertime ground site measurements in the Athabasca oil sands with a focus on analytically unresolved intermediate-volatility organic compounds." Atmospheric Chemistry and Physics 18, no. 24 (2018): 17819–41. http://dx.doi.org/10.5194/acp-18-17819-2018.

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Abstract. In this paper, measurements of air pollutants made at a ground site near Fort McKay in the Athabasca oil sands region as part of a multi-platform campaign in the summer of 2013 are presented. The observations included measurements of selected volatile organic compounds (VOCs) by a gas chromatograph–ion trap mass spectrometer (GC-ITMS). This instrument observed a large, analytically unresolved hydrocarbon peak (with a retention index between 1100 and 1700) associated with intermediate-volatility organic compounds (IVOCs). However, the activities or processes that contribute to the rel

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Rauw, Gregor, and Yaël Nazé. "Similar but different: the varied landscape of Onfp/Oef stars variability." Monthly Notices of the Royal Astronomical Society 500, no. 2 (2020): 2096–111. http://dx.doi.org/10.1093/mnras/staa3310.

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ABSTRACT The Oef category gathers rapidly rotating and evolved O-stars displaying a centrally reversed He ii λ 4686 emission line. The origin of the variability of their photospheric and wind spectral lines is debated, with rotational modulation or pulsations as the main contenders. To shed new light on this question, we analysed high-quality and high-cadence Transiting Exoplanet Survey Satellite photometric time series for five Oef stars. We also collected a new time series of spectra for one target (λ Cep) which had been the subject of specific debates in the last years. These observations r

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Kim, Hea-Ran, Min-Sun Jang, Yeong-Gyun Nam, et al. "Enhanced Permeability of Fe-Based Amorphous Powder Cores Realized through Selective Incorporation of Carbonyl Iron Powders at Inter-Particle Voids." Metals 11, no. 8 (2021): 1220. http://dx.doi.org/10.3390/met11081220.

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In this study, we demonstrate a hybrid multimodal soft magnetic composite (SMC) comprising gas-atomized spherical amorphous powder (AP) and carbonyl-iron powder (CIP), and present its enhanced electromagnetic properties. CIP is selectively incorporated into voids between AP, and deforms during compression, effectively reducing the pores, resulting in high packing density of the core, where CIP magnetically bridges AP and helps magnetic domain rotation much efficiently. The hybrid SMC with the addition of 20 wt.% CIP showed constant effective permeability of 57 up to 1 MHz, a remarkable 63% inc

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Bonalumi, Davide, Antonio Giuffrida, and Federico Sicali. "Thermo-economic analysis of a supercritical CO₂-based waste heat recovery system." E3S Web of Conferences 312 (2021): 08022. http://dx.doi.org/10.1051/e3sconf/202131208022.

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This work investigates the performance of a supercritical CO2 cycle as the bottoming cycle of a commercial gas turbine with 4.7 MW of electric power output. In detail, the partial heating cycle is the layout chosen for the interesting trade-off between heat recovery and cycle efficiency with a limited number of components. Single-stage radial turbomachines are selected according to the theory of similitude. In particular, the compressor is a troublesome turbomachine as it works near the critical point where significant variations of the CO2 properties occur. Efficiency values for turbomachiner

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Bolotina, Nadezhda B., Pavel N. Gavryushkin, Andrey V. Korsakov, et al. "Incommensurately modulated twin structure of nyerereite Na1.64K0.36Ca(CO3)2." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 73, no. 2 (2017): 276–84. http://dx.doi.org/10.1107/s2052520616020680.

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The incommensurately modulated twin structure of nyerereite Na1.64K0.36Ca(CO3)2has been first determined in the (3 + 1)-dimensional symmetry groupCmcm(α00)00swith modulation vectorq= 0.383a*. Unit-cell values area= 5.062 (1),b= 8.790 (1),c= 12.744 (1) Å. Three orthorhombic components are related by threefold rotation about [001]. Discontinuous crenel functions are used to describe the occupation modulation of Ca and some CO3groups. The strong displacive modulation of the O atoms in vertexes of such CO3groups is described using x-harmonics in crenel intervals. The Na, K atoms occupy mixed sites

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Greiner, Cherry, Stephanie Grainger, Samantha Farrow, et al. "Robust quantitative assessment of collagen fibers with picrosirius red stain and linearly polarized light as demonstrated on atherosclerotic plaque samples." PLOS ONE 16, no. 3 (2021): e0248068. http://dx.doi.org/10.1371/journal.pone.0248068.

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Collagen is an important component in maintaining structural integrity and functionality of tissues and is modulated in various biological processes. Its visualization and possible quantification using histopathological stains can be important for understanding disease progression or therapeutic response. Visualization of collagen fiber with the histological stain picrosirius red (PSR) is enhanced with polarized light and quantitative analysis is possible using circular polarizers. However, linear polarizers are more commonly available and easier to optically align. The objective of the presen

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Jiang, Qianjing, Zhiming Qi, Chandra A. Madramootoo, Ward Smith, Naeem A. Abbasi, and Tiequan Zhang. "Comparison of RZWQM2 and DNDC Models to Simulate Greenhouse Gas Emissions under Combined Inorganic/Organic Fertilization in a Subsurface-Drained Field." Transactions of the ASABE 63, no. 4 (2020): 771–87. http://dx.doi.org/10.13031/trans.13668.

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HighlightsRZWQM2 was compared with DNDC to predict greenhouse gas emissions.RZWQM2 was applied to simulate the greenhouse gas emissions under manure application.RZWQM2 performed better than DNDC in simulating soil water content and CO2 emissions.Abstract. N management has the potential to mitigate greenhouse gas (GHG) emissions. Process-based models are promising tools for evaluating and developing management practices that may optimize sustainability goals as well as promote crop productivity. In this study, the GHG emission component of the Root Zone Water Quality Model (RZWQM2) was tested u

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KUNIYOSHI, YASUO, RYO FUKANO, TAKUYA OTANI, TAKUMI KOBAYASHI, and NOBUYUKI OTSU. "HAPTIC DETECTION OF OBJECT AFFORDANCES BY A MULTI-FINGERED ROBOT HAND." International Journal of Humanoid Robotics 02, no. 04 (2005): 415–35. http://dx.doi.org/10.1142/s0219843605000600.

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This paper proposes a learning method for detecting object affordances through haptic exploration by a multi-fingered robot hand. Learning how to remove a screw cap from a bottle is the present target task. Assuming that coarse manipulation strategy is given by other methods, such as visual observation of a model task, the system applies coarse grabbing actions to the target object. In response to the exploratory actions, the object moves (rotates, in this case) along the physical constraint (screw). The robot detects the resulting motion through proprioception of the compliant fingers. A non-

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GARAEVA, A. R., S. A. LAPSHINA, V. I. ANISIMOV, et al. "Clinical and instrumental diagnostics of early changes in the atlantoaxial area in ankylosing spondylitis." Practical medicine 21, no. 3 (2023): 68–73. http://dx.doi.org/10.32000/2072-1757-2023-3-68-73.

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The purpose — to assess the early imaging changes in the atlantoaxial area and to compare them with clinical and laboratory characteristics in patients with ankylosing spondylitis (AS). Material and methods. 20 patients with AS were examined, the average age is 44.2 ± 12.66 y. o. Activity (ASDAS(CRP)): very high — 85%, high — 5%, low — 10%. X-ray stage of sacroiliitis: 2 — 60%, 3 — 15%, 4 — 25%. Functional deficiency (FD): 3 — 55%, 2 — 20%, 1 — 25%. The duration of illness was 176 [2; 360] months. The extended clinical examination included: assessment of neurological status, presence of compon

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Zhang, Quan, Huimin Lei, Dawen Yang, Lihua Xiong, Pan Liu, and Beijing Fang. "Decadal variation in CO<sub>2</sub> fluxes and its budget in a wheat and maize rotation cropland over the North China Plain." Biogeosciences 17, no. 8 (2020): 2245–62. http://dx.doi.org/10.5194/bg-17-2245-2020.

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Abstract. Carbon sequestration in agroecosystems has great potential to mitigate global greenhouse gas emissions. To assess the decadal trend of CO2 fluxes of an irrigated wheat–maize rotation cropland over the North China Plain, the net ecosystem exchange (NEE) with the atmosphere was measured by using an eddy covariance system from 2005 to 2016. To evaluate the detailed CO2 budget components of this representative cropland, a comprehensive experiment was conducted in the full 2010–2011 wheat–maize rotation cycle by combining the eddy covariance NEE measurements, plant carbon storage samples,

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Yang, Zimu, Hongsheng Jiang, Weilin Zhuge, Yuping Qian, and Yangjun Zhang. "Investigation on unsteady characteristics of flow separation in a supercritical carbon dioxide centrifugal compressor." Journal of Physics: Conference Series 2707, no. 1 (2024): 012004. http://dx.doi.org/10.1088/1742-6596/2707/1/012004.

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Abstract As one of the core components of supercritical carbon dioxide (S-CO2) closed Brayton cycle, the efficiency of S-CO2 centrifugal compressor plays a crucial role. Affected by the special thermophysical properties of S-CO2 fluid, the flow mechanism of S-CO2 centrifugal compressor is different from the centrifugal compressor of conventional fluid, such as air. Previous studies have found that the flow separation within the flow domain of this kind of compressor is easily to occur downstream the pressure surface. Many steady computational fluid dynamics (CFD) studies have been conducted on

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Tretsiakova-McNally, Svetlana, Helen Lubarsky, Ashlene Vennard, et al. "Separation and Characterization of Plastic Waste Packaging Contaminated with Food Residues." Polymers 15, no. 13 (2023): 2943. http://dx.doi.org/10.3390/polym15132943.

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In this paper, we present the development of a novel processing technology to tackle hard-to-recycle plastic packaging waste contaminated with food residues. The proof-of-concept (POC) technology can effectively separate food residual amounts from plastic waste materials to a level acceptable for further re-use or recycling of the plastic packaging. To assess this technology, we have conducted spectroscopic, thermal, and calorimetric characterizations of the obtained fractions, such as cleaned mixed plastics (CMP), food waste with mixed plastics (FWMP), and a mixture of microplastics (MP). The

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Vlasblom, Marissa, Milou Temmink, Sierra L. Grant, et al. "MINDS. JWST-MIRI reveals a peculiar CO₂-rich chemistry in the drift-dominated disk CX Tau." Astronomy & Astrophysics 693 (January 2025): A278. https://doi.org/10.1051/0004-6361/202450863.

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Context. Radial drift of icy pebbles can have a large impact on the chemistry of the inner regions of protoplanetary disks, where most terrestrial planets are thought to form. Disks with compact millimeter dust emission (≲50 au) are suggested to have a higher H2O flux than more extended disks, as well as show excess cold H2O emission, likely due to efficient radial drift bringing H2O-rich material to the inner disk, where it can be observed with IR facilities such as the James Webb Space Telescope (JWST). Aims. We present JWST MIRI/MRS observations of the disk around the low-mass T Tauri star

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Turner, David G. "An eclectic view of our Milky Way galaxy." Canadian Journal of Physics 92, no. 9 (2014): 959–63. http://dx.doi.org/10.1139/cjp-2013-0429.

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The nature of our Milky Way galaxy is re-examined from an eclectic point of view. Evidence for a central bar, for example, is not reflected in the distribution of RR Lyrae variables in the central bulge (Majaess. Acta Astron. 60, 55 (2010); Dékány et al. arXiv:1309.5933. 2013), and it is not clear if either a 2-armed or 4-armed spiral pattern is appropriate for the spiral arms. Radial velocity mapping of the Galaxy using radio H I, H II, or CO observations is compromised by the assumptions adopted for simple Galactic rotation. The Sun’s local standard of rest (LSR) velocity is ∼14 km s−1 rathe

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Souza, José Wilker Germano de, João Henrique Silva da Luz, Dayane Mércia Ribeiro Silva, et al. "Maize Morphophysiological Changes Modulated by Cover Crops Rotation in Northeast Brazil." Stresses 4, no. 4 (2024): 699–713. http://dx.doi.org/10.3390/stresses4040045.

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Cover crops have gained attention due to their potential benefits for the soil and physiological performance of subsequent crops. This study aimed to evaluate the physiological and productive aspects of maize grown in succession to cover crops in northeastern Brazil. A randomized complete block design with four repetitions was employed, in which the treatments consisted of the following cover crops: sunn hemp, spectabilis, pigeon pea, Brachiaria sp., jack bean, millet, and fallow. Physiological aspects and production components of maize were evaluated at the tasseling (VT) and smooth grain (R3

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