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Journal articles on the topic 'Medium density'

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Author: Grafiati

Published: 10 December 2022

Last updated: 20 February 2023

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1

Rosu-Finsen, Alexander, Michael B. Davies, Alfred Amon, Han Wu, Andrea Sella, Angelos Michaelides, and Christoph G. Salzmann. "Medium-density amorphous ice." Science 379, no. 6631 (February 3, 2023): 474–78. http://dx.doi.org/10.1126/science.abq2105.

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Amorphous ices govern a range of cosmological processes and are potentially key materials for explaining the anomalies of liquid water. A substantial density gap between low-density and high-density amorphous ice with liquid water in the middle is a cornerstone of our current understanding of water. However, we show that ball milling “ordinary” ice I h at low temperature gives a structurally distinct medium-density amorphous ice (MDA) within this density gap. These results raise the possibility that MDA is the true glassy state of liquid water or alternatively a heavily sheared crystalline state. Notably, the compression of MDA at low temperature leads to a sharp increase of its recrystallization enthalpy, highlighting that H 2 O can be a high-energy geophysical material.

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2

Coelho Junior, Luiz Moreira, Thaisa de Sousa Selvatti, Filipe Vanderlei Alencar, Márcio Lopes da Silva, and José Luiz Pereira de Rezende. "Global concentration of MDF (Medium Density Fiberboard) exports." Revista Chapingo Serie Ciencias Forestales y del Ambiente 25, no. 3 (August 30, 2019): 413–24. http://dx.doi.org/10.5154/r.rchscfa.2018.11.084.

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3

Park, Young-Kwon, Kyung-Seon Park, and Sung Hoon Park. "Fast pyrolysis of Medium-Density Fiberboard Using a Fluidized Bed Reactor." Applied Chemistry for Engineering 24, no. 6 (December 10, 2013): 672–75. http://dx.doi.org/10.14478/ace.2013.1099.

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4

Lijun Zhang, Xiaohua Xia, and Jiangfeng Zhang. "Medium Density Control for Coal Washing Dense Medium Cyclone Circuits." IEEE Transactions on Control Systems Technology 23, no. 3 (May 2015): 1117–22. http://dx.doi.org/10.1109/tcst.2014.2349793.

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5

Akgul, Mehmet, Yalcin Copur, Cengiz Guler, Ayhan Tozluoglu, and Umit Buyuksari. "Medium Density Fiberboard from Quercus robur." Journal of Applied Sciences 7, no. 7 (March 15, 2007): 1085–87. http://dx.doi.org/10.3923/jas.2007.1085.1087.

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6

Welch, John. "Demonstrating Wavelength Dependency on Medium Density." Physics Teacher 47, no. 7 (October 2009): 476. http://dx.doi.org/10.1119/1.3225516.

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7

Lin, Richard J. T., Jeroen van Houts, and Debes Bhattacharyya. "Machinability investigation of medium-density fibreboard." Holzforschung 60, no. 1 (January 1, 2006): 71–77. http://dx.doi.org/10.1515/hf.2006.013.

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Abstract For many applications, the perceived quality of a medium-density fibreboard (MDF) is influenced by the appearance of its machined surface. The behaviour of MDF has been studied by passing a cutting tool through it at a relatively low speed. A digital camera was used that travels synchronously with the tool and the deformation occurring in front of the tool tip was recorded. The magnification of approximately 30× also allows the individual fibres or bundles to be clearly observed. Photographic images have also been taken of the same machining process at a much higher speed, producing similar results and thus establishing the slow-speed study as a viable option. The machining of different MDF samples has been recorded using a cutting speed of 1.6 mm s−1 and varying depths of cut (0.5, 0.75 and 1.0 mm). The video recordings of various panels permit the identification of their peculiar machining characteristics. Unrefined particles play a major role during machining. The trends of results have also been confirmed by scanning electron micrographs. The board densities were found to have a major influence on the machinability characteristics of the boards.

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8

Narisawa, Ikuo, and Hiroyuki Nishimura. "Unstable cracking of medium density polyethylene." Journal of Materials Science 24, no. 4 (April 1989): 1165–68. http://dx.doi.org/10.1007/bf02397043.

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9

Adzila, Sharifah, Iis Sopyan, Siti Farius, Nurfahana Wahab, and Singh Ramesh. "Mechanochemical Synthesis of Hydroxyapatite Bioceramics through Two Different Milling Media." Key Engineering Materials 531-532 (December 2012): 254–57. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.254.

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This work presents the wet mechanochemical synthesis of hydroxyapatite (HA) powder through two different milling mediums. The effect of milling mediums on powder properties was investigated. Two types of medium: water and ethanol were chosen with 370 rpm milling speed for 15 hours time. Characterization of synthesized powders was accomplished by X-ray diffraction (XRD) analysis. The green compacts were prepared and sintered in atmosphere condition at various temperatures ranging from 900oC - 1300oC. The mechanical and physical properties were evaluated under Vickers microhardness test and density measurement. Both of synthesis mediums yielded HA phases in the synthesized powders as detected by the peaks obtained in XRD analysis. Compacts synthesized in water medium (M1) showed a maximum density, 99% sintered at 1000oC and 1300oC. However, the hardness in water medium is closely similar to the ethanol medium as a function of sintering temperature where the maximum hardness was found in compacts synthesized in ethanol medium (M2) sintered at 1300oC (5.8GPa). The microstructure observed from SEM analysis was in line with the density obtained as the surface of sintered compacts synthesized in water medium (M1) contained less pores with large grain growth.

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10

Hamed Mosavian, M. T., A. Bakhtiari, and S. Sahebian. "Tensile Creep Behavior of Medium-Density Polyethylene." Journal of Thermoplastic Composite Materials 24, no. 4 (December 31, 2010): 555–66. http://dx.doi.org/10.1177/0892705710393125.

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11

Yuling, Wang, Zhao Yuemin, and Yang Jianguo. "Density distribution in a heavy-medium cyclone." Mining Science and Technology (China) 21, no. 2 (March 2011): 175–79. http://dx.doi.org/10.1016/j.mstc.2011.02.019.

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12

Rivela, Beatriz, Ma Teresa Moreira, and Gumersindo Feijoo. "Life cycle inventory of medium density fibreboard." International Journal of Life Cycle Assessment 12, no. 3 (May 2007): 143–50. http://dx.doi.org/10.1007/s11367-006-0290-4.

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13

Manassah, Jamal T. "Reflectivity from a density-modulated resonant medium." Physics Letters A 328, no. 1 (July 2004): 11–19. http://dx.doi.org/10.1016/j.physleta.2004.05.058.

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14

Dai, Z. G., and X. F. Wu. "GRB 030226 in a Density-Jump Medium." Astrophysical Journal 591, no. 1 (June 4, 2003): L21—L24. http://dx.doi.org/10.1086/377037.

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15

Donaldson, L. A., and T. D. Lomax. "Adhesive/fibre interaction in medium density fibreboard." Wood Science and Technology 23, no. 4 (1989): 371–80. http://dx.doi.org/10.1007/bf00353254.

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16

Rivela, Beatriz, Ma Teresa Moreira, and Gumersindo Feijoo. "Life cycle inventory of medium density fibreboard." International Journal of Life Cycle Assessment 12, no. 3 (December 8, 2006): 143–50. http://dx.doi.org/10.1065/lca2006.12.290.

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17

Toribio, Ramón, María Jesús Cruz, Ferran Morell, and Xavier Muñoz. "Hypersensitivity Pneumonitis Related to Medium-Density Fiberboard." Archivos de Bronconeumología (English Edition) 48, no. 1 (January 2012): 29–31. http://dx.doi.org/10.1016/j.arbr.2011.04.008.

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18

Davim, J. Paulo, V. C. Clemente, and Sérgio Silva. "Drilling investigation of MDF (medium density fibreboard)." Journal of Materials Processing Technology 203, no. 1-3 (July 2008): 537–41. http://dx.doi.org/10.1016/j.jmatprotec.2007.10.017.

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19

Nishimura, Hiroyuki, and Ikuo Narisawa. "Fatigue behavior of medium-density polyethylene pipes." Polymer Engineering and Science 31, no. 6 (March 1991): 399–403. http://dx.doi.org/10.1002/pen.760310603.

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20

Madani, Mohammad, Naser Sharifi-Sanjani, Ehsan Rezaei-Zare, and Reza Faridi-Majidi. "Preparation of granular crosslinkable medium-density polyethylene." Journal of Applied Polymer Science 104, no. 3 (2007): 1873–79. http://dx.doi.org/10.1002/app.25847.

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21

Ritter de Souza Barnasky, Ricardo, Alexsandro Bayestorff da Cunha, Amanda Dantas de Oliveira, Martha Andreia Brand, Gabriela Escobar Hochmuller da Silva, Luana Muller de Souza, and Rodrigo Buss. "High density polyethylene matrix composite as reinforcing agent in medium density fiberboards." Journal of Composite Materials 54, no. 28 (June 17, 2020): 4369–85. http://dx.doi.org/10.1177/0021998320931913.

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This work provides a study about the incorporation of a high density polyethylene (HDPE) matrix composite in medium density fiberboards (MDF). A composite was processed in a single screw extruder with 5% of Pinus spp fibers in a HDPE matrix and applied as reinforcing agent in MDFs, as well as pure HDPE, in 11 different variations, using 12% of urea-formaldehyde resin and nominal density of 750 kg.m−3. The composite and the pure HDPE were analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The DSC results showed that both polymeric matrix and composite presented the same melting temperature but the composite had a reduced melting enthalpy and crystallinity due to thermal history. SEM analysis showed a well distribution of fibers on the composite. The results of technological properties of MDFs were compared to commercial MDF standards. The MDF reinforced with 40% of polymeric composite reached all minimum standard requirements, being the most recommended to be used as an alternative to conventional MDF, in terms of physical and mechanical performance.

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22

Li, Kaiyuan. "On Determining Density and Specific Heat of New Zealand Medium Density Fibreboard." Procedia Engineering 62 (2013): 769–77. http://dx.doi.org/10.1016/j.proeng.2013.08.124.

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23

Elias, Rob, and Craig Bartlett. "Briefing: Closing the loop for medium-density fibreboard." Proceedings of the Institution of Civil Engineers - Waste and Resource Management 171, no. 2 (May 2018): 33–35. http://dx.doi.org/10.1680/jwarm.17.00043.

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24

Mikheev, S. P., and A. Yu Smirnov. "Neutrino oscillations in a medium with variable density." Uspekhi Fizicheskih Nauk 150, no. 12 (1986): 632. http://dx.doi.org/10.3367/ufnr.0150.198612j.0632.

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25

Barbosa, Juliana Cortez, Anderson Luiz da Silva Michelon, Elen Aparecida Martines Morales, Cristiane Inácio de Campos, André Luis Christoforo, and Francisco Antonio Rocco Lahr. "Medium Density Particleboard with Addition of Impregnated Paper." Advanced Materials Research 1025-1026 (September 2014): 543–46. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.543.

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The aim of this research was to produce three-layer Medium Density Particleboard (MDP), with the addition of impregnated paper, in the inner layer, in proportions of 1; 5 and 20%. In this study, MDP was composed with particles of small size in outer layers, and larger particles in internal layer. After panel manufacturing, physical and mechanical tests based on Brazilian Code ABNT NBR 14.810 were carried out to determine moisture content; density; thickness swelling; water absorption; modulus of rupture (MOR) and modulus of elasticity (MOE) in static bending and internal adhesion. Test results were compared to commercial panels, produced with 100% Eucalyptus, considering the requirements specified by Brazilian Code. Properties presented values close to normative specifications, indicating positively the possibility of production of MDP using addition of waste paper impregnated.

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26

Hirokoh, M., H. Suzuki, T. Nishiyama, T. Oohata, and M. Hasegawa. "Metal Particulate Medium for Ultra High Density Recording." Journal of the Magnetics Society of Japan 14, no. 2 (1990): 41–44. http://dx.doi.org/10.3379/jmsjmag.14.41.

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27

Pinkowski, Grzegorz, Waldemar Szymański, Magdalena Piernik, and Andrzej Krauss. "Medium-density fibreboard milling using selected technological parameters." BioResources 16, no. 1 (November 24, 2020): 558–71. http://dx.doi.org/10.15376/biores.16.1.558-571.

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The aim of this study was to investigate the effect of blade type and sharpness angle on blade wear, cutting power, and surface roughness. The study was conducted on medium-density fibreboard (MDF) panels. Two blade types were analyzed (high-speed steel and cemented carbides) along with three variants of sharpness angles (40°, 45°, and 55°). Machining operations were performed on a spindle moulder at a feed rate of 6.3 m/min and rotational speed of 4500 min-1. The blade wear criterion was adopted as the loss of cutter surface area measured on the rake face. Roughness was determined using the Ra parameter, which was measured at three points on the cross-section of the MDF panel. A new, multifaceted approach to the study of cutting a narrow surface of the MDF board was used, thanks to which the interaction of such parameters as blade wear, cutting power, and machining quality as well as the type of material of the knives and their angular parameters were determined. An increase in blade wear and cutting power was recorded with an increase in cutting path, while roughness at the MDF panel cross-section varied. The cemented carbides cutter with the 45° angle may be proposed as optimal, because it showed a relatively low wear and cutting power while providing good quality of the milled surface.

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28

Timchenko, S. L., and N. A. Zadorozhny. "Conducting Medium Electrical Conductivity at High Current Density." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 6 (99) (December 2021): 64–78. http://dx.doi.org/10.18698/1812-3368-2021-6-64-78.

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The experimental research example of electrical characteristics of structurally heterogeneous thinlayer conductors (nickel, copper) at high current density (108--109 А/m2) is shown. This current density in conditions of the samples intensive cooling is sufficient for the process of irreversible, nonthermally activated deformation. The experiment results show that the conducting medium at high current density has essential nonlinearities expressed in nonlinear dependence of the samples electrical resistance from current density. With repeated current treatments of the samples the conductors' electrical resistivity decreases. The number of defects removed from the volume of material as a result of nickel foil treatment by electric current is estimated. It is shown that under conditions of highdensity direct electric current flow in microvolumes of homogeneous and inhomogeneous conducting media a volume charge can appear. The appearance of the volume charge in a conducting medium can be caused by interaction forces during the motion of electrons and ions. Due to the interaction forces between ions and electrons of basic material and impurities, additional local ionization occurs which is realized in nano-volumes of a conductor. In the case of heterogeneous medium, the volume charge depends on the nature of the specific conductivity distribution. In a homogeneous conductor the volume charge is proportional to the square of the current density in the sample

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29

Hosseinabadi, F., Seyed Mojtaba Zebarjad, and Mohammad Mazinani. "Investigation on Perforation Mechanism of Medium Density Polyethylene." Materials Science Forum 675-677 (February 2011): 387–90. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.387.

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In this article, the perforation mechanism(s) of polyethylene was investigated through experiments. Several polyethylene (PE) film samples were fabricated by compression molding technique. In order to examine the perforation mechanism of PE, perforation tests were conducted according to ASTM F 1306 Standard procedure. The damage and plastic zone areas around the perforated area in PE test samples under cross polarized light condition were studied using the optical microscope. The plastic zone area was measured using an image analysis technique. For further clarification of the perforation mechanism of medium density PE (MDPE) films, the micrographs obtained form scanning electron microscope were examined. SEM observation of the test specimens showed shear bands formed in the plastic zone around the perforated area. The shear bands were observed to be on 45° angle with respect to the direction of applied force.

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30

Martínez Espinosa, Mariano, and Carlito Calil Jr. "Statistical fatigue experiment design in medium density fiberboard." Materials Research 3, no. 3 (July 2000): 84–91. http://dx.doi.org/10.1590/s1516-14392000000300007.

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31

Perrocheau, M., V. Boutreux, S. Chadi, X. Mata, P. Decaunes, T. Raudsepp, K. Durkin, et al. "Construction of a medium-density horse gene map." Animal Genetics 37, no. 2 (April 2006): 145–55. http://dx.doi.org/10.1111/j.1365-2052.2005.01401.x.

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32

Hagel, K., R. Wada, L. Qin, J. B. Natowitz, S. Shlomo, A. Bonasera, H. Zheng, et al. "In-Medium phenomena in Low Density Nuclear Matter." Journal of Physics: Conference Series 420 (March 25, 2013): 012086. http://dx.doi.org/10.1088/1742-6596/420/1/012086.

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33

Hirokoh, M., H. Suzuki, T. Nishiyama, T. Oohata, and M. Hasegawa. "Metal Particulate Medium for Ultra High Density Recording." IEEE Translation Journal on Magnetics in Japan 5, no. 10 (October 1990): 822–28. http://dx.doi.org/10.1109/tjmj.1990.4564354.

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34

Davim, J. P., V. Clemente, and S. Silva. "Evaluation of delamination in drilling medium density fibreboard." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 221, no. 4 (April 2007): 655–58. http://dx.doi.org/10.1243/09544054jem781.

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35

SOKER, NOAM, and MARIO LIVIO. "Accretion from a Medium Containing a Density Gradient." Annals of the New York Academy of Sciences 470, no. 1 Twelfth Texas (May 1986): 390. http://dx.doi.org/10.1111/j.1749-6632.1986.tb48015.x.

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36

Shi, Xun, and Congyao Zhang. "Turbulence decay in the density-stratified intracluster medium." Monthly Notices of the Royal Astronomical Society 487, no. 1 (May 21, 2019): 1072–81. http://dx.doi.org/10.1093/mnras/stz1392.

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Abstract Turbulence evolution in a density-stratified medium differs from that of homogeneous isotropic turbulence described by the Kolmogorov picture. We evaluate the degree of this effect in the intracluster medium (ICM) with hydrodynamical simulations. We find that the buoyancy effect induced by ICM density stratification introduces qualitative changes to the turbulence energy evolution, morphology, and the density fluctuation–turbulence Mach number relation, and likely explains the radial dependence of the ICM turbulence amplitude as found previously in cosmological simulations. A new channel of energy flow between the kinetic and the potential energy is opened up by buoyancy. When the gravitational potential is kept constant with time, this energy flow leaves oscillations to the energy evolution, and leads to a balanced state of the two energies where both asymptote to power-law time evolution with slopes shallower than that for the turbulence kinetic energy of homogeneous isotropic turbulence. We discuss that the energy evolution can differ more significantly from that of homogeneous isotropic turbulence when there is a time variation of the gravitational potential. Morphologically, ICM turbulence can show a layered vertical structure and large horizontal vortical eddies in the central regions with the greatest density stratification. In addition, we find that the coefficient in the linear density fluctuation–turbulence Mach number relation caused by density stratification is in general a variable with position and time.

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37

Pulikkathara, Merlyn X., Oleksandr V. Kuznetsov, Ivana R. G. Peralta, Xin Wei, and Valery N. Khabashesku. "Medium density polyethylene composites with functionalized carbon nanotubes." Nanotechnology 20, no. 19 (April 21, 2009): 195602. http://dx.doi.org/10.1088/0957-4484/20/19/195602.

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38

Mikheev, Stanislav P., and A. Yu Smirnov. "Neutrino oscillations in a medium with variable density." Soviet Physics Uspekhi 29, no. 12 (December 31, 1986): 1155–57. http://dx.doi.org/10.1070/pu1986v029n12abeh003628.

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39

Haque, A., and J. Berlamont. "Modeling Density and Turbulence in Stratified Tidal Medium." Journal of Hydraulic Engineering 124, no. 2 (February 1998): 135–45. http://dx.doi.org/10.1061/(asce)0733-9429(1998)124:2(135).

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40

Linial, Itai, and Re’em Sari. "Oblique shock breakout from a uniform density medium." Physics of Fluids 31, no. 9 (September 11, 2019): 097102. http://dx.doi.org/10.1063/1.5100060.

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41

Agafonov, A. V. "High-current electron beam in medium-density plasma." Physics of Particles and Nuclei Letters 9, no. 4-5 (July 2012): 377–79. http://dx.doi.org/10.1134/s1547477112040012.

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42

Blagojević, B., M. V. Popović, N. Konjević, and Z. Pavlović. "Electron temperature measurements in medium electron density plasmas." Journal of Quantitative Spectroscopy and Radiative Transfer 66, no. 6 (September 2000): 571–79. http://dx.doi.org/10.1016/s0022-4073(99)00187-9.

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43

Dolder, Craig N., Kevin M. Lee, and Preston S. Wilson. "Low scatterer density limit of effective medium theory." Journal of the Acoustical Society of America 134, no. 5 (November 2013): 4172. http://dx.doi.org/10.1121/1.4831293.

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44

Tappin, S. J., Z. K. Smith, and M. Dryer. "Scintillation, density and turbulence in the interplanetary medium." Planetary and Space Science 38, no. 8 (August 1990): 955–60. http://dx.doi.org/10.1016/0032-0633(90)90041-n.

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45

Middleton, B. K., M. M. Aziz, and D. E. Speliotis. "Medium magnetizations for longitudinal high-density digital recordings." IEEE Transactions on Magnetics 39, no. 1 (January 2003): 581–83. http://dx.doi.org/10.1109/tmag.2002.806350.

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46

Valarelli, Ivaldo D., Rosane A. G. Battistelle, Barbara Stolte Bezerra, Luiz A. Melgaço N. Branco, Eduardo Chahud, André Luis Christoforo, and Francisco Antonio Rocco Lahr. "Characterization of Medium Density Particleborads Using Agricultural Residues." Advanced Materials Research 1088 (February 2015): 656–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.656.

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In recent years the production of products derived from wood and bamboo are increasing, due to the search for a more rational exploitation of these raw materials. Amongst these products, the particleboards production combine sustainability and rationality in the use of these materials. In this context, this work has the objective to study the application of alternative raw materials in the manufacture of Medium Density Particleboards (MDP), using residues from industrial processimg of coffee and bamboo. MDP had been produced with particles of giganteus bamboo of the Dendrocalamus species and particle of coffee rind in the intermediate layer of the particleboard, bonded with polyurethane resin based on castor oil. The physical and mechanical characterization was carried out accordingly to NBR 14810-3 (2006). The physical properties evaluated were: of water absorption for 2h and 24h; thickness swallowing for 2h and 24h; density, humidity content. The mechanical properties evaluated were: Tensile strength, static bending (MOR and MOE). The results were compared with NBR 14810-2 (2006) and also with the ANSI A208-1 (1993). The physical performance of these particleboards was below the values recommend by the Brazilian norm. Also the mechanical characteristics are not improve, demonstrating that the inclusion of coffee rind did not benefit the physical characteristics and nor the mechanical ones. However it can be used as construction materials for partitions and ceiling panels.

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47

van Houts, Jeroen, Debes Bhattacharyya, and Krishnan Jayaraman. "Reduction of Residual Stresses in Medium Density Fibreboard." Holzforschung 55, no. 1 (January 2001): 67–72. http://dx.doi.org/10.1515/hfsg.2001.67.

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48

van Houts, Jeroen, Debes Bhattacharyya, and Krishnan Jayaraman. "Reduction of Residual Stresses in Medium Density Fibreboard." Holzforschung 55, no. 1 (January 2001): 73–81. http://dx.doi.org/10.1515/hfsg.2001.73.

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49

KUWAMOTO, KEN, and MASAHIRO KINOSHITA. "Interaction between solute molecules in medium density solvents." Molecular Physics 98, no. 11 (June 10, 2000): 725–36. http://dx.doi.org/10.1080/00268970009483342.

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50

Kinoshita, Ken Kuwamoto, Masahiro. "Interaction between solute molecules in medium density solvents." Molecular Physics 98, no. 11 (June 10, 2000): 725–36. http://dx.doi.org/10.1080/002689700162072.

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