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Journal articles on the topic 'Cool Core Cycles'

Author: Grafiati

Published: 6 September 2023

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1

Prasad, Deovrat, Prateek Sharma, Arif Babul, Gerard M. Voit, and Brian W. O’Shea. "Cool-core cycles and Phoenix." Monthly Notices of the Royal Astronomical Society 495, no. 1 (2020): 594–99. http://dx.doi.org/10.1093/mnras/staa1247.

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ABSTRACT Recent observations show that the star formation rate (SFR) in the Phoenix cluster’s central galaxy is ∼500 M⊙ yr−1. Even though Phoenix is a massive cluster (M200 ≈ 2.0 × 1015 M⊙; z ≈ 0.6) such a high central SFR is not expected in a scenario in which feedback from an active galactic nucleus (AGN) maintains the intracluster medium in a state of rough thermal balance. It has been argued that either AGN feedback saturates in very massive clusters or the central supermassive black hole is too small to produce enough kinetic feedback and hence is unable to quench the catastrophic cooling

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Prasad, Deovrat, Prateek Sharma, and Arif Babul. "COOL CORE CYCLES: COLD GAS AND AGN JET FEEDBACK IN CLUSTER CORES." Astrophysical Journal 811, no. 2 (2015): 108. http://dx.doi.org/10.1088/0004-637x/811/2/108.

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Ferland, Marie A., Peter S. Roy, and Colin V. Murray-Wallace. "Glacial Lowstand Deposits on the Outer Continental Shelf of Southeastern Australia." Quaternary Research 44, no. 2 (1995): 294–99. http://dx.doi.org/10.1006/qres.1995.1074.

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AbstractVibracores collected from water depths of 130 to 150 m on the outer continental shelf of southeastern Australia contain evidence for several cycles of shallow marine deposition. One of these vibracores (112/VC/134; lat. 33°24′S, long, 151°58′ E) preserves evidence for the last three glacial lowstands, as inferred from radiocarbon dating, amino acid racemization, and fossil mollusc assemblages. The core contains the inner-shelf molluscs Pecten fumatus, Placamen placidium, and Tawera gallinula, which today live in water depths of 10 to 50 m, in the cool waters of southern Australia. Radi

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Schellenberger, Gerrit, Ewan O’Sullivan, Simona Giacintucci, et al. "Feedback in the Extremely Violent Group Merger NGC 6338." Astrophysical Journal 948, no. 2 (2023): 101. http://dx.doi.org/10.3847/1538-4357/acc52e.

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Abstract The galaxy group NGC 6338 is one of the most violent group–group mergers known to date. While the central dominant galaxies rush at each other at 1400 km s−1 along the line of sight, with dramatic gas heating and shock fronts detected, the central gas in the BCGs remains cool. There are also indications of feedback from active galactic nuclei, and neither subcluster core has been disrupted. With our deep radio uGMRT data at 383 and 650 MHz, we clearly detect a set of large, old lobes in the southern BCG coinciding with the X-ray cavities, while the northern and smaller BCG appears sli

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Cielo, S., A. Babul, V. Antonuccio-Delogu, J. Silk, and M. Volonteri. "Feedback from reorienting AGN jets." Astronomy & Astrophysics 617 (September 2018): A58. http://dx.doi.org/10.1051/0004-6361/201832582.

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Aims. We test the effects of re-orienting jets from an active galactic nucleus (AGN) on the intracluster medium in a galaxy cluster environment with short central cooling time. We investigate both the appearance and the properties of the resulting cavities, and the efficiency of the jets in providing near-isotropic heating to the cooling cluster core. Methods. We use numerical simulations to explore four models of AGN jets over several active/inactive cycles. We keep the jet power and duration fixed across the models, varying only the jet re-orientation angle prescription. We track the total e

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Donders, Timme, Konstantinos Panagiotopoulos, Andreas Koutsodendris, et al. "1.36 million years of Mediterranean forest refugium dynamics in response to glacial–interglacial cycle strength." Proceedings of the National Academy of Sciences 118, no. 34 (2021): e2026111118. http://dx.doi.org/10.1073/pnas.2026111118.

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The sediment record from Lake Ohrid (Southwestern Balkans) represents the longest continuous lake archive in Europe, extending back to 1.36 Ma. We reconstruct the vegetation history based on pollen analysis of the DEEP core to reveal changes in vegetation cover and forest diversity during glacial–interglacial (G–IG) cycles and early basin development. The earliest lake phase saw a significantly different composition rich in relict tree taxa and few herbs. Subsequent establishment of a permanent steppic herb association around 1.2 Ma implies a threshold response to changes in moisture availabil

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Irving, Zackery A., Steven H. Saar, Bradford J. Wargelin, and José-Dias do Nascimento. "Stellar Cycles in Fully Convective Stars and a New Interpretation of Dynamo Evolution." Astrophysical Journal 949, no. 2 (2023): 51. http://dx.doi.org/10.3847/1538-4357/acc468.

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Abstract An αΩ dynamo, combining shear and cyclonic convection in the tachocline, is believed to generate the solar cycle. However, this model cannot explain cycles in fast rotators (with minimal shear) or in fully convective stars (no tachocline); an analysis of these stars could therefore provide key insights into how these cycles work. We reexamine ASAS data for 15 M dwarfs, 11 of which are presumed fully convective; the addition of newer ASAS-SN data confirms cycles in roughly 12 of them, while presenting new or revised rotation periods for 5 stars. The amplitudes and periods of these cycl

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Walker, Anthony, Matthew Driller, Matt Brearley, Christos Argus, and Ben Rattray. "Cold-water immersion and iced-slush ingestion are effective at cooling firefighters following a simulated search and rescue task in a hot environment." Applied Physiology, Nutrition, and Metabolism 39, no. 10 (2014): 1159–66. http://dx.doi.org/10.1139/apnm-2014-0038.

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Firefighters are exposed to hot environments, which results in elevated core temperatures. Rapidly reducing core temperatures will likely increase safety as firefighters are redeployed to subsequent operational tasks. This study investigated the effectiveness of cold-water immersion (CWI) and iced-slush ingestion (SLUSH) to cool firefighters post-incident. Seventy-four Australian firefighters (mean ± SD age: 38.9 ± 9.0 years) undertook a simulated search and rescue task in a heat chamber (105 ± 5 °C). Testing involved two 20-min work cycles separated by a 10-min rest period. Ambient temperatur

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Stevens, Lora R., Jeffery R. Stone, Josh Campbell, and Sherilyn C. Fritz. "A 2200-yr record of hydrologic variability from Foy Lake, Montana, USA, inferred from diatom and geochemical data." Quaternary Research 65, no. 02 (2006): 264–74. http://dx.doi.org/10.1016/j.yqres.2005.08.024.

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AbstractA 2200-yr long, high-resolution (∼5 yr) record of drought variability in northwest Montana is inferred from diatoms and δ18O values of bio-induced carbonate preserved in a varved lacustrine core from Foy Lake. A previously developed model of the diatom response to lake-level fluctuations is used to constrain estimates of paleolake levels derived from the diatom data. High-frequency (decadal) fluctuations in the de-trended δ18O record mirror variations in wet/dry cycles inferred from Banff tree-rings, demonstrating the sensitivity of the oxygen-isotope values to changes in regional mois

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Desprat, S., M. F. Sánchez Goñi, J. F. McManus, J. Duprat, and E. Cortijo. "Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence." Climate of the Past 5, no. 1 (2009): 53–72. http://dx.doi.org/10.5194/cp-5-53-2009.

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Abstract. We present a new high-resolution marine pollen record from NW Iberian margin sediments (core MD03-2697) covering the interval between 340 000 and 270 000 years ago, a time period centred on Marine Isotope Stage (MIS) 9 and characterized by particular baseline climate states. This study enables the documentation of vegetation changes in the north-western Iberian Peninsula and therefore the terrestrial climatic variability at orbital and in particular at millennial scales during MIS 9, directly on a marine stratigraphy. Suborbital vegetation changes in NW Iberia in response to cool/col

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Desprat, S., M. F. Sánchez Goñi, J. Duprat, E. Cortijo, and J. F. McManus. "Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence." Climate of the Past Discussions 4, no. 2 (2008): 375–414. http://dx.doi.org/10.5194/cpd-4-375-2008.

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Abstract. We present a new high-resolution marine pollen record from NW Iberian margin sediments (core MD03-2697) covering the interval between 340 000 and 270 000 years ago a time period centred on Marine Isotope Stage (MIS) 9 and characterised by particular baseline climate states. This study enables to document the vegetation changes in north-western Iberian Peninsula and therefore the terrestrial climatic variability at orbital and in particular at millennial scales during MIS 9, directly on a marine stratigraphy. Suborbital vegetation changes in NW Iberia in response to cool/cold events a

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Chubarenko, Irina. "Physical processes behind interactions of microplastic particles with natural ice." Environmental Research Communications 4, no. 1 (2022): 012001. http://dx.doi.org/10.1088/2515-7620/ac49a8.

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Abstract Microplastic particles (MPs, <5 mm) are found in marine ice in larger quantities than in seawater, however, the distribution pattern within the ice cores is not consistent. To get insights into the most general physical processes behind interactions of ice and plastic particles in cool natural environments, information from academic and applied research is integrated and verified against available field observations. Non-polar molecules of common-market plastics are hydrophobic, so MPs are weak ice nucleators, are repelled from water and ice, and concentrate within air bubbles and

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Natvig, Erin E., Steven C. Ingham, Barbara H. Ingham, Leslie R. Cooperband, and Teryl R. Roper. "Salmonella enterica Serovar Typhimurium and Escherichia coli Contamination of Root and Leaf Vegetables Grown in Soils with Incorporated Bovine Manure." Applied and Environmental Microbiology 68, no. 6 (2002): 2737–44. http://dx.doi.org/10.1128/aem.68.6.2737-2744.2002.

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ABSTRACT Bovine manure, with or without added Salmonella enterica serovar Typhimurium (three strains), was incorporated into silty clay loam (SCL) and loamy sand (LS) soil beds (53- by 114-cm surface area, 17.5 cm deep) and maintained in two controlled-environment chambers. The S. enterica serovar Typhimurium inoculum was 4 to 5 log CFU/g in manure-fertilized soil. The conditions in the two environmental chambers, each containing inoculated and uninoculated beds of manure-fertilized soil, simulated daily average Madison, Wis., weather conditions (hourly temperatures, rainfall, daylight, and hu

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Shakir, Arwa Ossama, and Haifaa Abd Al-Rasool Ali. "The Effect of Lining Material on the Permeability of Clayey Soil." Civil Engineering Journal 5, no. 3 (2019): 662. http://dx.doi.org/10.28991/cej-2019-03091277.

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The main objectives of current work are to reduce the permeability of clayey soil for different fluid (water and crude oil) and to predict its efficiency for petroleum storage. Current research uses a sodium bentonite (B) with percentage (1.5, 3 and 6%) by the dry weight of soil and coal tar extended epoxy resin coating as the lining material. The soil sample was brought from AL -Nahrawan region. Soil's permeability for petrol was studied through using compacted soil model and making a central hole (core) in it with changing its dimensions (diameter, thickness of wall and base), type of fluid

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Guo, Zhenghuai, Klaus Regenauer-Lieb, Phung Nhu Hao Vu, and Zhenliang Guan. "Characteristics of Elastoplastic Consolidation by Compaction and Its Effects on Coal Permeability." Energies 15, no. 20 (2022): 7647. http://dx.doi.org/10.3390/en15207647.

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This paper presents a combined experimental–analytical investigation of coal strain development under fluctuating applied hydrostatic stress. The laboratory setup mimics the isotropic volumetric compaction of coal under burial–uplift cycles in the absence of tectonic stress. Special emphasis is placed on the corresponding permeability evolution of the coal strata. Our results show that the stress–strain path is exponential, approaching a linear relation in the logarithmic stress–strain space with the monotonic increase in stress. A similar behavior is found for the strain–permeability path in

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16

Li, Yan, Guoshun Wang, Zhaohao Li, Jiahai Yuan, Dan Gao, and Heng Zhang. "A Life Cycle Analysis of Deploying Coking Technology to Utilize Low-Rank Coal in China." Sustainability 12, no. 12 (2020): 4884. http://dx.doi.org/10.3390/su12124884.

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At present, the excess capacity in China’s coke industry can be deployed to utilize some low-rank coal, replacing coking coal with potential economic gains, energy efficiency, and environmental benefits. This study presents a life cycle analysis to model these potential benefits by comparing a metallurgical coke technical pathway with technical pathways of gasification coke integrated with different chemical productions. The results show that producing gasification coke is a feasible technical pathway for the transformation and development of the coke industry. However, its economic feasibilit

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17

Liang, Ji Wei, Ruo Gu Wang, and Zhen Jun Liu. "Base Level Cycle and Coal-Accumulation of Lower Member of Shanxi Formation of Permian in Northeast Part Ordos Basin." Advanced Materials Research 524-527 (May 2012): 266–73. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.266.

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Coal accumulation of Lower Member of Shanxi Formation in Northwest part of Ordos basin has been researched according to the principle of base level cycle based on outcrops, core description, and well log. Sedimentary face analysis, base level correlation, condense data controlling mapping were adopted. Coal forming has a close relation to base level cycle, face distribution, and coal-forming latter stage of short-term base level ascending cycle. Coal measure distribution has a complementary relationship with distributary channel. In peat swamp far from distributary channel, coal layer has grea

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18

Li, Ranran, Jieyi Yu, Asif Shah, et al. "Novel in situ Synthesized Fe@C Magnetic Nanocapsules Used as Adsorbent for Removal of Organic Dyes and its Recycling." Nano 11, no. 02 (2016): 1650013. http://dx.doi.org/10.1142/s1793292016500132.

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Core/shell type carbon-coated Fe nanocapsules (Fe@C NCs) were in situ synthesized by DC arc-discharge plasma method in methane atmosphere. Such Fe nanocapsules have saturation magnetization of 29.32[Formula: see text]emu/g and specific surface area of 85.86[Formula: see text]m2/g. The carbon shell of Fe@C NCs was functionalized with oxygen-containing groups (such as –OH or –COOH) by using H2O2. The adsorption of organic dye, e.g., methylene blue (MB) was systematically investigated in different conditions, such as contact time, pH values and temperature. The maximum adsorption capacity (46.5[F

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Horoshkova, L., Y. Khlobystov, and V. Volkov. "CYCLICAL NATURE OF THE COAL MINING INDUSTRY IN UKRAINE AND ITS SUSTAINABLE DEVELOPMENT CAPACITY." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3 (90) (2020): 54–61. http://dx.doi.org/10.17721/1728-2713.90.08.

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The mechanism for Ukrainian coal mining industry's sustainable development management has been formed as a result of the study. Significant losses in the process of coal mining are proved to be one of the coal mining industry problems. It has been specified that the reserve for the industry's efficiency upgrading in the framework of more resource-saving behaviour is funding of mines reconstruction. Slowdown in the coal mining industry development has been determined to be the result of military operation in Donets'k and Luhans'k regions. The inefficiency of transport logistics for coal resourc

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Xia, Jing, Shuxiang Li, Yuan Gao, Dakui Zhang, Qiongguang Li, and Yanhong Wang. "Silicon/Needle Coke Composites as Efficient Anodes for Lithium Ion Batteries." MATEC Web of Conferences 363 (2022): 01022. http://dx.doi.org/10.1051/matecconf/202236301022.

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In this research, a facile method was reported to prepare silicon/carbon composites by heating Si nanosheets and coal-based needle cokes in the assistance of binder glucopyranose. The microstructures and electrochemical performances of samples were analyzed. It was found that Si nanosheets adhered to needle cokes forming silicon/carbon composites. Compared with needle cokes, the composites showed higher capacity and initial coulombic efficiency. Also, they improved the cycle stability of silicon materials. The silicon/carbon anode had a reversible capacity of 381.8 mAh/g at a current density o

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Biava, Nadia, Marisa Brienza, Annalisa Bonafede, et al. "Constraining the AGN duty cycle in the cool-core cluster MS 0735.6+7421 with LOFAR data." Astronomy & Astrophysics 650 (June 2021): A170. http://dx.doi.org/10.1051/0004-6361/202040063.

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Context. MS 0735.6+7421 is a galaxy cluster that hosts a central radio galaxy with a very steep spectrum. The spectrum is produced by one of the most powerful known jetted active galactic nuclei (AGN). The radio plasma, ejected at nearly light speed from the central AGN, has displaced the intra-cluster medium, leaving two pairs of cavities observable in the X-ray. The cavities are associated with two different outbursts and have distributed energy to the surrounding medium. While the age of the cavities has previously been estimated from the X-rays, no confirmation from radio data is available

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Pasini, T., M. Gitti, F. Brighenti, et al. "A First Chandra View of the Cool Core Cluster A1668: Offset Cooling and AGN Feedback Cycle." Astrophysical Journal 911, no. 1 (2021): 66. http://dx.doi.org/10.3847/1538-4357/abe85f.

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Morcote, Anyela, Gary Mavko, and Manika Prasad. "Dynamic elastic properties of coal." GEOPHYSICS 75, no. 6 (2010): E227—E234. http://dx.doi.org/10.1190/1.3508874.

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Laboratory ultrasonic velocity measurements of different types of coal demonstrate that their dynamic elastic properties depend on coal rank and applied effective pressure. In spite of the growing interest in coal beds as targets for methane production, the high abundance in sedimentary sequences and the strong influence that they have on seismic response, little data are available on the acoustic properties of coal. Velocities were measured in core plugs parallel and perpendicular to lamination surfaces as a function of confining pressure up to [Formula: see text] in loading and unloading cyc

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Nagarkatti, Arun, and Ajit Kumar Kolar. "Assessment of Life Cycle Greenhouse Gas Emissions from Coal Fired Power Plants in India." Applied Mechanics and Materials 704 (December 2014): 487–90. http://dx.doi.org/10.4028/www.scientific.net/amm.704.487.

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More than two third share of electricity come from coal fired power plants in India. Coal fired power plants are the largest source of anthropogenic CO2 emissions per unit of electricity generation among all fossil fuel based power plants. There has been climate change and global warming globally due to increasing anthropogenic emission of greenhouse gas (GHG) into the atmosphere. This paper examines life cycle GHG emission such as CH4, CO2 and N2O of a National Thermal Power Corporation (NTPC) Limited power plant using life cycle approach. The various stages involved in the assessment of life

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Chen, Ling-Xiao, Shi-Jun Yin, Tong-Qing Chai, et al. "Ultra-High Adsorption Capacity of Core–Shell-Derived Magnetic Zeolite Imidazolate Framework-67 as Adsorbent for Selective Extraction of Theophylline." Molecules 28, no. 14 (2023): 5573. http://dx.doi.org/10.3390/molecules28145573.

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A core–shell-derived structural magnetic zeolite imidazolate framework-67 (Fe3O4-COOH@ZIF-67) nanocomposite was fabricated through a single-step coating of zeolite imidazolate framework-67 on glutaric anhydride-functionalized Fe3O4 nanosphere for the magnetic solid-phase extraction (MSPE) of theophylline (TP). The Fe3O4-COOH@ZIF-67 nanocomposite was characterized through scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectrometry, Fourier transform infrared spectroscopy, Zeta potential analysis, X-ray diffraction, Brunauer–Emmett–Teller, and vibrating s

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Zhao, Li, and Xiangdong Xu. "The development of Coke Carried-Heat Gasification Coal-Fired Combined Cycle." Journal of Thermal Science 8, no. 4 (1999): 270–76. http://dx.doi.org/10.1007/s11630-999-0016-6.

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Villar, Álvaro Alejandro, and Edwar Herrera. "Reservoir quality and petrophysical evaluation of the Paleocene paralic sandstones in the Ranchería sub-basin, Colombia." Boletín de la Sociedad Geológica Mexicana 73, no. 1 (2021): A151220. http://dx.doi.org/10.18268/bsgm2021v73n1a151220.

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The Ranchería sub-basin is an unexplored basin which gives a valuable opportunity to find new perspectives about the hydrocarbon potential in Colombia. The sandy facies of the Paleocene Cerrejón Formation accomplish with the characteristics within the petroleum system, to be considered as a potential reservoir rock. This work aims to evaluate the reservoir quality of the Cerrejón Formation using three cored wells, through the integration of well logs, core sedimentological descriptions, porosity and permeability lab data, and thin-sections analysis. Using GR log patterns and sedimentary cycles

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Chen, Chun-Ti, and Marc-Jan Gubbels. "TgCep250 is dynamically processed through the division cycle and is essential for structural integrity of the Toxoplasma centrosome." Molecular Biology of the Cell 30, no. 10 (2019): 1160–69. http://dx.doi.org/10.1091/mbc.e18-10-0608.

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The apicomplexan centrosome has a unique bipartite structure comprising an inner and outer core responsible for the nuclear cycle (mitosis) and budding cycles (cytokinesis), respectively. Although these two cores are always associated, they function independently to facilitate polyploid intermediates in the production of many progeny per replication round. Here, we describe the function of a large coiled-coil protein in Toxoplasma gondii, TgCep250, in connecting the two centrosomal cores and promoting their structural integrity. Throughout the cell cycle, TgCep250 localizes to the inner core b

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Anselm, Reiner, Johannes Fischer, Wolfgang Lienemann, and Hans-Richard Reuter. "Der Bologna-Prozess als Herausforderung für die theologische Ethik." Zeitschrift für Evangelische Ethik 49, no. 1 (2005): 169–89. http://dx.doi.org/10.14315/zee-2005-0125.

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Abstract The Bologna process forces a reframing of the theological education. In the autor's mind, it affords chances for an improved quality during the first two cycles. The change from an input-oriented to an output-oriented leaming provides a better professional competences. In addition, the Bologna process provokes to profile theology in an interdisciplinary context. The article outlines the profile of Theological Ethics as a self-contained discipline, connectedwith both, the other theolgical disciplines and the adjacent sciences, such as medicine, law, and sociology. According to this, th

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Yang, Junyao, and Liangliang Guo. "Dynamic Evaluation of Water Utilization Efficiency in Large Coal Mining Area Based on Life Cycle Sustainability Assessment Theory." Geofluids 2021 (September 15, 2021): 1–20. http://dx.doi.org/10.1155/2021/7793988.

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Coal mining enterprises have a variety of water sources, complex drainage structures, long production chain, and many links, which lead to uncoordinated water utilization and low water efficiency. Taking a large coal mining area of China as an example, a dynamic model was established to evaluate the water utilization efficiency based on the Life Cycle Sustainability Assessment (LCSA) theory. In the model, the influence of five aspects (including resources, economy, technology, society, and environment) and 19 factors was considered. The game theory method was adopted to calculate the fusion we

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Hikmawaty, Hikmawaty, Eleonora Sofilda, and Maria Ariesta Utha. "Analysis of Environmental Management Strategy Based On Life Cycle Analysis In Coal Companies That Won Proper Emas In 2019-2021." Eduvest - Journal of Universal Studies 3, no. 1 (2023): 110–25. http://dx.doi.org/10.36418/eduvest.v3i1.721.

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This study aims to determine the limitations and application of life cycle analysis in the mining industry as well as recommendations for innovation programs and strategies in supporting environmental performance improvements that have an impact on the acquisition of “Proper emas”, the role of internal and external stakeholders as well as the relationship to the implementation of ISO 26000, especially the environment, governance and good operating practices and achievement of environmental SDGs indicators number 6,7 12 and 13.The data used in this study consists of primary data from coal minin

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Hikmawaty, Hikmawaty, Eleonora Sofilda, and Maria Ariesta Utha. "Analysis of Environmental Management Strategy Based On Life Cycle Analysis In Coal Companies That Won Proper Emas In 2019-2021." Eduvest - Journal of Universal Studies 3, no. 1 (2023): 110–25. http://dx.doi.org/10.59188/eduvest.v3i1.721.

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This study aims to determine the limitations and application of life cycle analysis in the mining industry as well as recommendations for innovation programs and strategies in supporting environmental performance improvements that have an impact on the acquisition of “Proper emas”, the role of internal and external stakeholders as well as the relationship to the implementation of ISO 26000, especially the environment, governance and good operating practices and achievement of environmental SDGs indicators number 6,7 12 and 13.The data used in this study consists of primary data from coal minin

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Li, Xiaohong, Rony Keppens, and Yuhao Zhou. "Coronal Rain in Randomly Heated Arcades." Astrophysical Journal 926, no. 2 (2022): 216. http://dx.doi.org/10.3847/1538-4357/ac41cd.

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Abstract Adopting the MPI-AMRVAC code, we present a 2.5-dimensional magnetohydrodynamic simulation, which includes thermal conduction and radiative cooling, to investigate the formation and evolution of the coronal rain phenomenon. We perform the simulation in initially linear force-free magnetic fields that host chromospheric, transition-region, and coronal plasma, with turbulent heating localized on their footpoints. Due to thermal instability, condensations start to occur at the loop top, and rebound shocks are generated by the siphon inflows. Condensations fragment into smaller blobs movin

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Dongellini, Matteo, Agostino Piazzi, Filippo De Biagi, and Gian Luca Morini. "The modelling of reverse defrosting cycles of air-to-water heat pumps with TRNSYS." E3S Web of Conferences 111 (2019): 01063. http://dx.doi.org/10.1051/e3sconf/201911101063.

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The most widespread defrosting technique adopted by Air-Source Heat Pumps (ASHPs) during the heating season is Reverse Cycle Defrosting (RCD). In this paper a dynamic model of RCD, based on performance data provided by the heat pump manufacturer, designed for TRNSYS and with a core-structure suitable for commercial units, is presented. A defrost cycle is divided in three phases. First, the unit heating capacity is reduced as a linear function of the ice layer thickness (Pre-Defrost phase). Subsequently, the reverse cycle operating mode is modelled on the basis of the performance data given by

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Schurz, Martin, Alexander Laugwitz, Steffen Krzack, and Bernd Meyer. "Comparison of Two Coal-Gasifier-Designs with Moving-Bed and Internal-Circulating-Fluidized-Bed Configuration in One Reactor." Open Fuels & Energy Science Journal 10, no. 1 (2017): 48–67. http://dx.doi.org/10.2174/1876973x01710010048.

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Background:Coal gasification is the promising technology for syngas routes to produce chemicals or transportation fuels. Additionally, it enables clean power generation from coal in Integrated Gasification Combined Cycles (IGCC). So far, coal fines with high ash contents could not be feasibly used in such routes.In this regard, the Internal Circulation gasifier (INCI) is designed to gasify high-ash coal fines efficiently. The staged system is combining a moving bed, a fluidized bed and a jetting fluidized bed in one reaction chamber.Method:The present paper substantially describes the laborato

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Krajčík, Michal, Michal Masaryk, Martin Šimko, and Peter Mlynár. "Possibilities of combining radiant wall cooling with ejector cooling cycle powered by Fresnel solar collectors." E3S Web of Conferences 172 (2020): 03003. http://dx.doi.org/10.1051/e3sconf/202017203003.

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Solar ejector cooling presents an alternative to the commonly used compressor vapour machines. It is a potentially feasible technology for space cooling providing that the temperature of the cooling water is high enough to assure reasonable efficiency of the chiller. This could be achieved by increasing the evaporation temperature of the cooling cycle through its combination with a high-temperature radiant cooling system. We explore the possibilities and benefits of combining a high-temperature radiant wall system with a solar ejector cycle for space cooling of buildings. The lowest water temp

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Zsótér, Brigitta, and Renáta Kaliczka. "Examinations carried out in relation to the shopping habits and satisfaction of costumers in the shops of Coop Szeged LTD." Analecta Technica Szegedinensia 8, no. 1 (2014): 38–41. http://dx.doi.org/10.14232/analecta.2014.1.38-41.

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Different shop types have different life cycles: introduction, growth, stagnation and decline. The form of supermarkets is in a stage of decline in each EU country.ÂÂÂ For customers coming to the supermarkets of Coop Co., in Szeged is typical to do their shopping every day or more times a week. Shoppers come to do mainly their daily shopping in the shops. The main reasons for choosing them were the wide range of goods and the suitable accessibility of shops. Coop has its own brand which is very popular with customers. There are customers who directly come to the shops to buy products with this

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FOLĘGA, Piotr, Dorota BURCHART, Paweł MARZEC, Simona JURSOVA, and Pavlina PUSTEJOVSKA. "POTENTIAL ENVIRONMENTAL LIFE CYCLE IMPACTS OF FUEL CELL ELECTRIC VEHICLES POWERED BY HYDROGEN PRODUCED FROM POLISH COKE OVEN GAS." Transport Problems 17, no. 1 (2022): 151–61. http://dx.doi.org/10.20858/tp.2022.17.1.13.

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This study analysed the greenhouse gas (GHG) emissions of hydrogen fuel cell vehicles’(FCEVs’) life cycles. These included models running on hydrogen derived from coke oven gas (COG), which is a by-product of the coking process of coal and includes hydrogen, methane, and other gases. FCEVs and hydrogen have the potential to drive future mobility. Hydrogen can be separated from the COG in the process of pressure swing adsorption to obtain a purity of hydrogen that meets the requirements of a hydrogen FCEV. An environmental life cycle assessment (LCA) of FCEV powered by hydrogen produced from Po

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White, Benjamin D., and Helen E. Townley. "Radio Wave-Activated Chemotherapy—A Novel Nanoparticle Thermoresponsive Copolymer Drug Delivery Platform." Materials 16, no. 6 (2023): 2482. http://dx.doi.org/10.3390/ma16062482.

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Radio waves are highly penetrating, non-ionizing, and cause minimal damage to surrounding tissues. Radio wave control of drug release has been achieved using a novel thermoresponsive copolymer bound to a superparamagnetic iron oxide nanoparticle (SPION) core. A NIPAM-acrylamide-methacrolein copolymer underwent a coil-to-globular structure phase change upon reaching a critical temperature above the human body temperature but below hyperthermic temperatures. The copolymer was covalently bound to SPIONs which increase in temperature upon exposure to radio waves. This effect could be controlled by

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Ulizar, I., and P. Pilidis. "A Semiclosed-Cycle Gas Turbine With Carbon Dioxide–Argon as Working Fluid." Journal of Engineering for Gas Turbines and Power 119, no. 3 (1997): 612–16. http://dx.doi.org/10.1115/1.2817028.

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This paper describes the performance analysis of a semiclosed-cycle gas turbine. The working fluid is carbon dioxide and the fuel is low heating value gas synthesized from coal. The objective of the machine is to produce clean electricity with the smallest efficiency penalty. First, the thermodynamic properties of the gases in the cycle were obtained as a function of temperature and pressure. Then two performance simulation codes were developed. These have the ability of simulating different configurations of open, closed, and semiclosed cycles. The first code was used for cycle optimization a

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Schlesinger, William H., Emily M. Klein, and Avner Vengosh. "Global biogeochemical cycle of vanadium." Proceedings of the National Academy of Sciences 114, no. 52 (2017): E11092—E11100. http://dx.doi.org/10.1073/pnas.1715500114.

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Synthesizing published data, we provide a quantitative summary of the global biogeochemical cycle of vanadium (V), including both human-derived and natural fluxes. Through mining of V ores (130 × 109 g V/y) and extraction and combustion of fossil fuels (600 × 109 g V/y), humans are the predominant force in the geochemical cycle of V at Earth’s surface. Human emissions of V to the atmosphere are now likely to exceed background emissions by as much as a factor of 1.7, and, presumably, we have altered the deposition of V from the atmosphere by a similar amount. Excessive V in air and water has po

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Hu, Chunlin, and Jing Xie. "The Effect of Multiple Freeze–Thaw Cycles on the Microstructure and Quality of Trachurus murphyi." Foods 10, no. 6 (2021): 1350. http://dx.doi.org/10.3390/foods10061350.

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Temperature fluctuation in frozen food storage and distribution is the perpetual and core issue faced by the frozen food industry. Ice recrystallisation induced by temperature fluctuations under cold storage causes microstructural changes in fish products and irreversible damages to cells and tissues, which lower the frozen fish quality in the food chain. This study is intended to explore how repeated freezing–thawing affected the microstructure and quality of Trachurus murphyi during its frozen storage. The results showed the consistency between the increase in ice crystal diameter, volume, a

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Wilson, D. G. "The Supplementary-Fired Exhaust-Heated Cycle for Coal, Wood and Refuse-Derived Fuel." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 207, no. 3 (1993): 203–8. http://dx.doi.org/10.1243/pime_proc_1993_207_034_02.

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An analysis is presented of a system that would enable refuse-derived fuel (RDF) (produced from, principally, paper) or other biomass (for example wood chips) or coal to be burned cleanly in a highly efficient gas turbine system of a size that would match the needs of many communities (a solid waste flow of 1000–3000 tons per day). The system consists of a gas turbine engine with two principal and several minor additions. The principal additions are a combustor to burn the RDF at approximately atmospheric pressure in the hot turbine exhaust flow and a high-temperature heat exchanger to transfe

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Muslimin, Muslimin, Grenny Sudarmawan, Zhazha Yoslin, and Dhiya Luqyana. "Mechanical Properties Comparison Between Induction Hardening and Rehardening of <i>Axle Shaft</i> AISI 1043 According to JIS G 0559 Standard." Key Engineering Materials 948 (June 6, 2023): 3–12. http://dx.doi.org/10.4028/p-muclo2.

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Induction hardening is carried out to increase the hardness of the axle shaft surface. Axle shaft specimens were hardened from the bearing seat area to the spline area of the axle. The hardness requirements of the scope of the shaft met 400-450 HV of the JIS G 0559 standard. The axle shaft's hardening process with induction coil stops in the field before reaching the spline area. It causes the hardness becomes uneven and not comply with the standard. The re-hardening process is often carried out to repair rejected parts. In this work, the result of the re-hardening process is analyzed and comp

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Zdanowicz, Christian M., Bernadette C. Proemse, Ross Edwards, et al. "Historical black carbon deposition in the Canadian High Arctic: a <i>></i>250-year long ice-core record from Devon Island." Atmospheric Chemistry and Physics 18, no. 16 (2018): 12345–61. http://dx.doi.org/10.5194/acp-18-12345-2018.

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Abstract. Black carbon aerosol (BC), which is emitted from natural and anthropogenic sources (e.g., wildfires, coal burning), can contribute to magnify climate warming at high latitudes by darkening snow- and ice-covered surfaces, and subsequently lowering their albedo. Therefore, modeling the atmospheric transport and deposition of BC to the Arctic is important, and historical archives of BC accumulation in polar ice can help to validate such modeling efforts. Here we present a > 250-year ice-core record of refractory BC (rBC) deposition on Devon ice cap, Canada, spanning the years from 17

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Durand, Yves. "Le nouveau cycle 3 implique-t-il un rapprochement entre l��cole �l�mentaire et le coll�ge�?" Administration & �ducation N�158, no. 2 (2018): 17. http://dx.doi.org/10.3917/admed.158.0017.

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Wang, Junfeng, Dantong Liu, Xinlei Ge, et al. "Characterization of black carbon-containing fine particles in Beijing during wintertime." Atmospheric Chemistry and Physics 19, no. 1 (2019): 447–58. http://dx.doi.org/10.5194/acp-19-447-2019.

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Abstract. Refractory black carbon (BC) is a product of incomplete combustion of fossil fuel, biomass and biofuel, etc. By mixing with other species, BC can play significant roles in climate change, visibility impairment and human health. Such BC-containing particles in densely populated megacities like Beijing may have specific sources and properties that are important to haze formation and air quality. In this work, we exclusively characterized the BC-containing particles in urban Beijing by using a laser-only Aerodyne soot particle aerosol mass spectrometer (SP-AMS), as part of the Atmospher

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Catuneanu, Octavian, and Arthur R. Sweet. "Maastrichtian-Paleocene foreland-basin stratigraphies, western Canada: a reciprocal sequence architecture." Canadian Journal of Earth Sciences 36, no. 5 (1999): 685–703. http://dx.doi.org/10.1139/e98-018.

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Palynological and magnetostratigraphic chronostratigraphic correlations of lower Maastrichtian to Paleocene strata along an east-west Western Canada Basin transect allow for the recognition of a reciprocal sequence architecture in nonmarine strata. Reference sections include three Canadian Continental Drilling Program Cretaceous-Tertiary Boundary Project core holes and outcrops in Alberta, southern Saskatchewan, and north-central Montana. The spatial and temporal position of the third-order sequences provides evidence for the correlation of proximal sector regional disconformities and sediment

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Li, Junjie, and Wanjing Cheng. "Comparative life cycle energy consumption, carbon emissions and economic costs of hydrogen production from coke oven gas and coal gasification." International Journal of Hydrogen Energy 45, no. 51 (2020): 27979–93. http://dx.doi.org/10.1016/j.ijhydene.2020.07.079.

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Li, Jingying, Xiaoxun Ma, Heng Liu, and Xiyu Zhang. "Life cycle assessment and economic analysis of methanol production from coke oven gas compared with coal and natural gas routes." Journal of Cleaner Production 185 (June 2018): 299–308. http://dx.doi.org/10.1016/j.jclepro.2018.02.100.

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