Relevant bibliographies by topics / Disk basic

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Disk basic'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Disk basic"

1

Miranda, Ryan, and Roman R. Rafikov. "Planet–Disk Interaction in Disks with Cooling: Basic Theory." Astrophysical Journal 892, no. 1 (March 30, 2020): 65. http://dx.doi.org/10.3847/1538-4357/ab791a.

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FUNATSU, Kazumori, Toshihisa KAJIWARA, Takeshi MINODA, and Yoshinori OHGA. "Basic Study on Disk Type Extruders." Seikei-Kakou 1, no. 1 (1989): 95–103. http://dx.doi.org/10.4325/seikeikakou.1.95.

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Kato, Shoji. "Basic Properties of Thin-Disk Oscillations." Publications of the Astronomical Society of Japan 53, no. 1 (February 25, 2001): 1–24. http://dx.doi.org/10.1093/pasj/53.1.1.

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Mineshige, S. "Accretion Disk Instabilities." International Astronomical Union Colloquium 134 (1993): 83–103. http://dx.doi.org/10.1017/s0252921100013968.

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AbstractBasic properties of accretion disk instabilities are summarized. We first explain the standard disk model by Shakura and Sunyaev. In this model, the dominant sources of viscosity are assumed to be chaotic magnetic fields and turbulence in gas flow, and the magnitude of viscosity is prescribed by so-called a model. It is then possible to build a particular disk model. In the framework of the standard model, accretion disks are stationary, but when some of the basic assumptions are relaxed, various kinds of instabilities appear. In particular, we focus on the thermal limit-cycle instability caused by partial ionization of hydrogen (and helium). We demonstrate that the disk instability model well accounts for the basic observed features of outbursts of dwarf novae and X-ray nova. We then introduce other kinds of instabilities based on the α viscosity model. They are suspected to produce time variabilities observed on a wide range of timescales in close binaries and active galactic nuclei.
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Brodersen, S., D. E. Metzger, and H. J. S. Fernando. "Flows Generated by the Impingement of a Jet on a Rotating Surface: Part I—Basic Flow Patterns." Journal of Fluids Engineering 118, no. 1 (March 1, 1996): 61–67. http://dx.doi.org/10.1115/1.2817514.

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The results of an experimental study of the flow field resulting from the interaction between an impinging jet and a rotating disk are presented. The resulting flow configuration has applications in turbomachinery, for example, to intensify the local heat transfer at turbine disks. The experiments cover separate measurements of the disk-wall flow, the jet flow and interaction between the two. The flow patterns are investigated over a range of jet Reynolds numbers Rejet = 0.66-104 - 6.80-104 (based on jet diameter) and disk Reynolds numbers Redisk 3.4·105 − 6.2· 105 (based on impingement radius), achieved by varying the jet nozzle diameter, jet flow rate, rotational disk speed and the impingement radius. The measurements included the depth of jet penetration into the wall boundary layer, the travel distance of the jet against the direction of disk rotation, and the turbulent and mean velocity distribution. Another objective of this study concerns the type of flow at the impingement region (jet dominated flow or rotation dominated flow) and the conditions for the transition from one to the other. In the first part of the study, the flow structure of the jet and disk flows as well as the three-dimensional flow fields resulting from the interaction are presented.
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Grüner, Martin, and Marion Merklein. "Basic Experimental and Numerical Investigations on Chip Pressing." Key Engineering Materials 554-557 (June 2013): 630–37. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.630.

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Aluminium alloys show a great potential for lightweight constructions due to their high strength and low density but the production of this material is very energy consuming. Also the recycling of aluminium alloys, e.g. chips from the milling process, shows different challenges. Beside contamination by cooling lubricant and oxidation of the surface of the chips the melting and rolling process for new semi finish products needs a high amount of energy. TEKKAYA shows a new approach for recycling of aluminium alloy chips by an extrusion process at elevated temperatures producing different kinds of profiles. A new idea is the production of components directly out of chips using severe plastic deformation for joining of the chips similar to the accumulative roll bonding process in sheet metal forming. In a first approach aluminium alloy chips out of a milling process were uniaxial compressed with different loads inside an axisymmetric tool installed in a universal testing machine. The compressed chip disks subsequently were tested with two experiments to gain information on their stability. First experiment is a disk compression test with the disk standing on its cylindrical surface, giving information on the stability perpendicular to the compression direction. Second experiment is a stacked disk compression test with three disks to investigate the stability parallel to compression direction. During all three tests force and displacement values are recorded by the universal testing machine. These data are also processed to calculate or identify input parameters for the numerical investigations. For numerical simulation ABAQUS in conjunction with the Drucker-Prager-Cap material model, which is often used for sintering processes, seems to be a good choice. By numerical simulation of the experiments and comparison with the experiments input parameters for the material model can be identified showing good accordance. This material model will be used in future numerical investigations of an extrusion process to identify tool geometries leading to high strains inside the material and by this to an increased stability of the parts.
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Marinov, Boycho. "Full Dynamic Reactions in the Basic Shaft Bearings of Big Band Saw Machines." Journal of Theoretical and Applied Mechanics 43, no. 1 (March 1, 2013): 3–18. http://dx.doi.org/10.2478/jtam-2013-0001.

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Abstract The band saws machines are a certain class woodworking machines for longitudinal or transversal cutting as well as for curvilinear wood cutting. These machines saw the wood through a band-saw blade and two feeding wheels. These wheels usually are very large and they are produced with inaccuracies. The centre of mass of the disc is displaced from the axis of rotation of the distance e (eccentricity) and the axis of the disk makes an angle with the axis of rotation. In this paper, the dy- namic reactions in the bearings of the basic shaft, which drives the band saw machines, are analyzed. These reactions are caused by the external loading and the kinematics and the mass characteristics of the rotating disk. The expressions for the full dynamic reactions are obtained. These expressions allow the parameters of the machines to be chosen in such a way that the loading in the shaft and the bearings to be minimal.
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Qian, Wen Xue, Li Yang Xie, and Xiao Wei Yin. "Finite Element Analysis of a Compressor Disk." Advanced Materials Research 118-120 (June 2010): 49–53. http://dx.doi.org/10.4028/www.scientific.net/amr.118-120.49.

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Compressor disk is a key rotor part of aeroengines. Alone with the increase of thrust weight ratio of aeroengines, the work conditions of compressor disk are more and more rigor. So the stress level of compressor is very high nowadays. As we know that the stress analysis is a basic of age analysis and reliability analysis, Do a finite element analysis (FEA) is necessary before and after the compressor disks have been made. In this paper, a detail analysis was done with finite element method (FEM), and the stress distribution of disk we got was consistent with the real stress distribution. Also the FEA results show that the location of maximum stress is the failure site of the disk. It is useful work for further work.
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Korakianitis, T., L. Meyer, M. Boruta, and H. E. McCormick. "Alternative Multinutating Disk Engine Configurations for Diverse Applications." Journal of Engineering for Gas Turbines and Power 126, no. 3 (July 1, 2004): 482–88. http://dx.doi.org/10.1115/1.1688770.

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The nutating engine is a new type of internal combustion engine with distinct advantages over conventional piston engines and gas turbines in small power ranges. The engine’s unique arrangement flexibility allows several alternative disk and shaft configurations, each selected for a different application. Variations in cycle temperature ratio and compression ratio during normal operation enable the engine to effectively become a variable-cycle engine, allowing significant flexibility for maximum efficiency or power or other optimizing function for on-ground stationary or for airborne applications. In its basic configuration the core of the engine is a nutating nonrotating disk, with the center of its hub mounted in the middle of a Z-shaped shaft. The two ends of the shaft rotate, while the disk “nutates,” performs a wobbling motion without rotating around its axis. The motion of the disk circumference prescribes a portion of a sphere. A portion of the area of the disk is used for intake and compression, a portion is used to seal against a center casing, and the remaining portion is used for expansion and exhaust. The compressed air is admitted to an external accumulator, and then into an external combustion chamber before it is admitted to the power side of the disk. A companion paper examines the performance potential of the one-disk engine. This paper examines alternative engine configurations. The external combustion chamber enables the engine to operate on a variable compression ratio cycle. In addition, separate disks of unequal size are used for intake and expansion, resulting in distinct and significant power, efficiency, fuel flexibility, and arrangement advantages over conventional piston engines, over gas turbines, and over the basic nutating-engine configuration. The performance of these arrangements is examined for: on-ground power, on-ground efficiency, (auxiliary power, automotive); and for small and light airframe applications for flight Mach numbers from 0 to 1 and altitudes from 0 to 20 km. This publication is the original presentation of the performance potential of several alternative configurations of the basic engine, such as multidisk arrangements, combustion and exhaust disks of different size, and variable-compression ratio (variable cycle) configurations.
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Валиев, Айрат, and Ayrat Valiev. "INVESTIGATION OF SOIL MOTION ALONG THE WORKING SURFACE OF A DISK CULTIVATOR." Vestnik of Kazan State Agrarian University 12, no. 3 (January 11, 2018): 54–60. http://dx.doi.org/10.12737/article_5a1d9587a0d852.23012684.

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The results of theoretical studies of a disk cultivator are presented, the working units of which consist of two flat discs, inclined to each other in the horizontal and vertical planes. The distance between the upper leading edges of the discs is greater than between the lower rear edges. When the discs move in the soil, the layer is jammed between them, breaks off from the bottom of the furrow, rises slightly upwards and is laid back into the furrow in the loosened state. The main constructive and adjusting parameters of the working unit are the inclination angles of discs γ, the distance between the discs d and the radius of the disks R. The purpose of this work is a theoretical study of the soil movement process in the inter-disk space and the rationale for the design and adjusting parameters of the developed disc cultivator. Based on the methods of theoretical mechanics, the terms for separating the soil particles from the main monolith and their motion along the working surface of the disks are investigated. Equations, describing the trajectories of soil particles with allowance for specific soil conditions, characterized by the basic mechanical parameters of the soil and also depending on the parameters of the working organ and the depth of soil cultivation are obtained. Based on the results of solving these equations, it is established that in the process of working at a depth of up to 16 cm, with a distance between the disks d = 0.15 ... 0.20 m, disc angles γ = 6 ... 90 and disk radius R = 0.25 m, the soil will be guaranteed to tear off from the monolith, rise to a height above the horizontal axis of the disk working units and leave the interdisk space. At the same time, on the one hand, the limiting value of the relative deformation of the soil is reached in the layer being processed, its fracture and crumbling are ensured, and on the other hand, the soil particles are thrown forward and the working organs of the disk cultivator are blocked.
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Dissertations / Theses on the topic "Disk basic"

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Frischkorn, Gidon T. [Verfasser], and Dirk [Akademischer Betreuer] Hagemann. "Basic cognitive processes of intelligence / Gidon T. Frischkorn ; Betreuer: Dirk Hagemann." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1181532531/34.

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Zenhäusern, Gabriela. "Non-classic properties of human cytolytic lymphocytes : basic and clinical aspects /." [S.l.] : [s.n.], 2008. http://edoc.unibas.ch/diss/DissB_8732.

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Pohle, Dirk [Verfasser]. "Komposite auf der Basis von Polyetheretherketon für den Knochenersatz / Dirk Pohle." Aachen : Shaker, 2009. http://d-nb.info/1156517818/34.

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Sieber, Martin Sieber Martin. "DNA binding reaction of basic-helix-loop-helix proteins /." [S.l.] : [s.n.], 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13578.

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Ahmed, Nazeer [Verfasser], and Dirk [Akademischer Betreuer] Becker. "Physiological and molecular basis of Azospirillum-Arabidopsis Interaction / Ahmed Nazeer. Betreuer: Dirk Becker." Würzburg : Universitätsbibliothek der Universität Würzburg, 2012. http://d-nb.info/1022522701/34.

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Holaus, Walter. "Ultra fast switches - basic elements for future medium voltage switchgear /." Zürich, 2001. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14375.

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Hambach, Manuel [Verfasser], and Dirk [Akademischer Betreuer] Volkmer. "Hochfeste multifunktionale Verbundwerkstoffe auf Basis von Portlandzement und Kohlenstoffkurzfasern / Manuel Hambach ; Betreuer: Dirk Volkmer." Augsburg : Universität Augsburg, 2017. http://d-nb.info/1139641174/34.

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Klinke, Stefan. "Production of bioplastic in recombinant bacteria : from basic research to application /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13448.

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Kastning, Kathrin. "Recognition of basic sorting motifs within synaptic membrane cargo proteins by the clathrin-adaptor complex AP-2." Doctoral thesis, [S.l.] : [s.n.], 2005. http://webdoc.sub.gwdg.de/diss/2005/kastning.

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Jungnickel, Uwe. "Miniaturisierte Positioniersysteme mit mehreren Freiheitsgraden auf der Basis monolithischer Strukturen." Phd thesis, [S.l. : s.n.], 2004. http://elib.tu-darmstadt.de/diss/000496.

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Books on the topic "Disk basic"

1

Morris, Jack F. Introduction toPSpice with student exercise disk: To accompany Cunningham/Stuller Basic circuit analysis. Boston: Houghton Mifflin, 1991.

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Morris, Jack F. Introduction to PSpice with student exercise disk: To accompany Cunningham/Stuller Basic circuit analysis. Boston: Houghton Mifflin, 1991.

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Kemnitz, Thomas Milton. The TRS-80 BASIC manual. Chicago: Childrens Press, 1985.

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L, Mandell Steven, ed. Introduction to computers using the IBM and MS-DOS PCs.: Includes the following software, WestSoft 1.0, student file disk. 2nd ed. St. Paul: West Pub. Co., 1987.

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1952-, Ryall Pat, ed. The complete Macintosh sourcebook. Santa Monica, CA: InfoBooks, 1985.

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Technology, Course. Disk Access 03 Basic. Course Technology Inc, 2003.

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Goodwin, Mark D. Power of Q Basic/Disk. Mis Pr, 1991.

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Basic Econometrics w/Data Disk. McGraw-Hill/Irwin, 2002.

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Gitman. Basic Manag Finan Disk II. Longman, 1988.

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Gujarati, Damodar N. Basic Econometrics w/Data Disk. 4th ed. McGraw-Hill/Irwin, 2002.

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Book chapters on the topic "Disk basic"

1

Kato, Shoji. "Basic Quantities Related to Disk Oscillations." In Oscillations of Disks, 27–44. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56208-5_2.

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Schellnack, K., and K. Büttner-Janz. "Possibilities and Results of Total Lumbar Disk Replacement." In Biomechanics: Basic and Applied Research, 511–16. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3355-2_72.

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Lee, DongWoo, and R. S. Ramakrishna. "Disk I/O Performance Forecast Using Basic Prediction Techniques for Grid Computing." In Lecture Notes in Computer Science, 259–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45145-7_24.

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Clair, Selvon F. St, and John M. Rhee. "Cervical Disk Herniation and Radiculopathy." In Spine Surgery Basics, 177–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34126-7_12.

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Boyaji, Shafik, Christopher J. Gilligan, Joshua A. Hirsch, and R. Jason Yong. "Evidentiary Basis of Percutaneous Discectomy." In The Disc and Degenerative Disc Disease, 157–71. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-03715-4_8.

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Herminghaus, Volker. "Disk and Storage System Basics." In Storage Management in Data Centers, 1–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85023-6_1.

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Sadek, R. I. M. "Basic Principles." In The Complete Disc Manual for the BBC Microcomputer, 3–13. London: Macmillan Education UK, 1986. http://dx.doi.org/10.1007/978-1-349-08590-3_2.

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Fernandez, Michael, and Sandeep N. Gidvani. "Thoracic Disc Herniation." In Spine Surgery Basics, 193–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34126-7_14.

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Spiker, William Ryan, and Brandon D. Lawrence. "Lumbar Disc Herniation." In Spine Surgery Basics, 203–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34126-7_15.

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Yee, Anita, and Danny Chan. "Genetic Basis of Intervertebral Disc Degeneration." In The Intervertebral Disc, 157–76. Vienna: Springer Vienna, 2013. http://dx.doi.org/10.1007/978-3-7091-1535-0_10.

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Conference papers on the topic "Disk basic"

1

Sharma, Dinkar, and Ramandeep Kaur. "Finite element solution for stress and strain in FGM circular disk." In ADVANCES IN BASIC SCIENCE (ICABS 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5122484.

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Giesen, Adolf. "Thin Disk Laser Design for High Power Diode-Pumped Solid-State Lasers." In Novel Lasers and Devices-Basic Aspects. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/nlda.1999.ltuc1.

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Asama, J., T. Tamura, D. Kanehara, T. Oiwa, and A. Chiba. "Basic performance of two-axis actively positioned bearingless disk motor." In 2012 IEEE Power & Energy Society General Meeting. New Energy Horizons - Opportunities and Challenges. IEEE, 2012. http://dx.doi.org/10.1109/pesgm.2012.6345314.

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Korakianitis, T., L. Meyer, M. Boruta, and H. E. McCormick. "Alternative Multi-Nutating-Disk Engine Configurations for Diverse Applications." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0572.

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The nutating engine is a new type of internal combustion engine with distinct advantages over conventional piston engines and gas turbines in small power ranges. The engine’s unique arrangement flexibility allows several alternative disk and shaft configurations, each selected for a different application. Variations in cycle temperature ratio and compression ratio during normal operation enable the engine to effectively become a variable-cycle engine, allowing significant flexibility for maximum efficiency or power or other optimizing function for on-ground stationary or for airborne applications. In its basic configuration the core of the engine is a nutating non-rotating disk, with the center of its hub mounted in the middle of a Z-shaped shaft. The two ends of the shaft rotate, while the disk “nutates”, performs a wobbling motion without rotating around its axis. The motion of the disk circumference prescribes a portion of a sphere. A portion of the area of the disk is used for intake and compression, a portion is used to seal against a center casing, and the remaining portion is used for expansion and exhaust. The compressed air is admitted to an external accumulator, and then into an external combustion chamber before it is admitted to the power side of the disk. A companion paper examines the performance potential of the one-disk engine. This paper examines alternative engine configurations. The external combustion chamber enables the engine to operate on a variable compression ratio cycle. In addition, separate disks of unequal size are used for intake and expansion, resulting in distinct and significant power, efficiency, fuel flexibility, and arrangement advantages over conventional piston engines, over gas turbines, and over the basic nutating-engine configuration. The performance of these arrangements is examined for: on-ground power, on ground efficiency, (auxiliary power, automotive); and for small and light airframe applications for flight Mach numbers from 0 to 1 and altitudes from 0 to 20 km. This publication is the original presentation of the performance potential of several alternative configurations of the basic engine, such as multi-disk arrangements, combustion and exhaust disks of different size, and variable-compression ratio (variable cycle) configurations.
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Qi-guo, Yao, and Liu Guoping. "Two-disk dynamo system and analysis of its basic non-linear dynamics characteristic." In 2012 IEEE International Conference on Computer Science and Automation Engineering (CSAE). IEEE, 2012. http://dx.doi.org/10.1109/csae.2012.6272622.

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Hatta, Masayoshi, Atsuhiko Shintani, and Tomohiro Ito. "Basic Study on the Seismic Response of the High-Speed Rotational Body Supported by Fluid Film Bearings." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57150.

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In this study, the seismic responses of a disk and a shaft are evaluated analytically. In an analytical model, the disk-shaft system is treated as an elastic shaft with a rigid disk, and the shaft is supported by fluid film bearings. Furthermore, the gyroscopic effect of a disk and the fluid forces due to fluid film bearings are considered. The equations of motion are derived for the translational and rotational motions when the floor is subjected to horizontal and vertical excitations. The displacements of the centers of the disk and the shaft are evaluated by numerical simulations. At first, the response behaviors of a rotating disk without base excitation are evaluated, and at second, the effects of sinusoidal base excitations are investigated. Finally, the response behaviors of this system are subjected to seismic waves of varying frequencies. The results of the different seismic wave input are studied.
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Córdoba, Oscar. "Mass Spring Interlocked Bladed Disk Model." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-15923.

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Abstract A simplified bladed disk model with cantilever and interlock conditions is described. Blade is composed of three masses, two for the lower and higher part of the shroud, and one for the main core of the blade. A similar scheme is employed in the disk. The different masses in the model are linked with springs introducing the stiffness between them. Additional disk restrictions reduce the model capabilities but account the effect of common boundary conditions. The model simplicity allows an analytical solution with polynomials to understand the fundamentals of vibration. The extended stiffness and mass matrix with Lagrange multipliers are used. The modal frequencies and modes as function of the nodal diameter are studied. The interlock solution is compared to cantilever and different sorts of frequency curves have been identified and classified. Some basic conclusions related to the model parameters are achieved.
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Sinha, Alok. "Vibration Absorbers for a Mistuned Bladed Disk." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56076.

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Mistuning refers to variations in modal properties of blades due to manufacturing tolerances. This can result in the amplification of a blade vibratory amplitude. This paper deals with the design of vibration absorbers for a mistuned bladed disk. First, the basic theory is established for undamped vibration absorbers using a single mode model for each blade. Then, it is extended to include a multiple mode model of each blade and disk dynamics. The impact of mistuning on the bladed disk vibration is examined in the presence of undamped absorbers via Monte Carlo simulations. It is found that vibration absorbers can be an effective method to counter the detrimental effects of mistuning.
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Sugaya, Toshihiro. "A Basic Concept for Next Generation DVD: 0.6 mm Substrate Disk Technology using Blue-Violet Laser." In Optical Data Storage. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/ods.2003.wb1.

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Zhang, Shou-Mo, Cuong-C. Vu, Qun-Yang Li, Norio Tagawa, and Quan-Shui Zheng. "Superlubricity Relevant in Hard Disk Drive Applications." In ASME 2016 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/isps2016-9523.

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Reduction of head-media spacing (HMS) keeps crucial during the increase of areal density of hard disk drives (HDD). The design of hard disk drive with a superlubric interface is reported with two schemes for HDI design to realize superlubricity. For the first scheme, the DLC layer is kept on the disk while removing the lubricant layer. The DLC layer on the transducer is replaced by graphene-like layer. The direct contact between head and disk could reduce the HMS to about 2.3 nm. For the second scheme, the DLC layer on disk is further replaced by graphene and the HMS could be reduced to below 1 nm. For the first scheme, the basic proof of concept experiments are conducted using micro-scale graphite island samples. Ultralow COF, with the average of 0.0344 on the interface of single crystalline graphite surface and DLC substrate is demonstrated by AFM. What’s more, the temperature dependence of friction between single crystalline graphite and DLC is measured by micro-force sensor mounted on micro-manipulator. The results show that heating helps to significantly decrease the friction. Desorption of contaminants along the interface is speculated to be the key mechanism for temperature dependence of friction. This work provides the concept of large-scale superlubricity relevant in HDD applications, which could be a promising technology to ultimately reduce HMS for future HDI development.
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Reports on the topic "Disk basic"

1

Badia, R., J. Ejarque, S. Böhm, C. Soriano, and R. Rossi. D4.4 API and runtime (complete with documentation and basic unit testing) for IO employing fast local storage. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.9.001.

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This deliverable presents the activities performed on the ExaQUte project task 4.5 Development of interface to fast local storage. The activities have been focused in two aspects: reduction of the storage space used by applications and design and implementation of an interface that optimizes the use of fast local storage by MPI simulations involved in the project applications. In the rst case, for one of the environments involved in the project (PyCOMPSs) the default behavior is to keep all intermediate les until the end of the execution, in case these les are reused later by any additional task. In the case of the other environment (HyperLoom), all les are deleted by default. To unify these two behaviours, the calls \delete object" and \detele le"have been added to the API and a ag \keep" that can be set to true to keep the les and objects that maybe needed later on. We are reporting results on the optimization of the storage needed by a small case of the project application that reduces the storage needed from 25GB to 350MB. The second focus has been on the de nition of an interface that enables the optimization of the use of local storage disk. This optimization focuses on MPI simulations that may be executed across multiple nodes. The added annotation enables to de ne access patters of the processes in the MPI simulations, with the objective of giving hints to the runtime of where to allocate the di erent MPI processes and reduce the data transfers, as well as the storage usage.
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