| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Parkkonen, Joni", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Timonen, Jussi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Pylv\u00e4inen, Joonas", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2016-12-20T17:12:03Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2016-12-20T17:12:03Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2016", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1644739", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/52487", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Liikkuvien tektonisten laattojen v\u00e4lill\u00e4 kitkan oletetaan olevan suuri. Olettamuksen vastaisia havaintoja on kuitenkin tehty useissa tutkimuksissa. Kuuluisin esimerkki on San Andreasin siirros. Siirrosvy\u00f6hykkeell\u00e4 on matala l\u00e4mm\u00f6ntuotto, mink\u00e4 perusteella on arveltu my\u00f6s kitkan olevan matala. Syyn\u00e4 matalaan kitkaan voivat olla py\u00f6re\u00e4t kulumapartikkelit, jotka toimivat kuulalaakereiden tavoin.\r\n\r\nKitkan tutkimista varten suunniteltiin ja rakennettiin ainutlaatuinen laite, kivenjauhin (engl. Stonegrinder). Kivenjauhimen tarkoitus on jauhaa kahta kairasyd\u00e4nt\u00e4 toisiaan vasten ja samalla mitata kitkan muutoksia. Laite mittaa jauhamisen aikana v\u00e4\u00e4nt\u00f6momenttia, josta laskennallisesti saadaan kitkakerroin. Lis\u00e4ksi kiven l\u00e4mp\u00f6tilan muutokset, py\u00f6rimisnopeus ja pystysuuntainen siirtym\u00e4 tallennetaan.\r\n\r\nTutkimusta varten valmistettiin sek\u00e4 karkea- ett\u00e4 sile\u00e4pintaisia n\u00e4ytteit\u00e4 gneissist\u00e4. Karkeita n\u00e4ytteit\u00e4 jauhettiin sek\u00e4 vakioisen normaalivoiman ett\u00e4 vakioisen normaalipaineen alla. Sile\u00e4t n\u00e4yteet jauhettiin vakioisen normaalivoiman ja -paineen alla.\r\n\r\nTuloksista havaittiin, ett\u00e4 karkeilla n\u00e4ytteill\u00e4 v\u00e4\u00e4nt\u00f6momentti ja l\u00e4mp\u00f6tilan muutoksen suuruus ovat k\u00e4\u00e4nteisesti riippuvaisia paineesta. Kitkakerroin ei osoittautunut olevan riippuvainen paineesta tai l\u00e4mp\u00f6tilasta. R\u00f6ntgentomografialla kuvatut kulumapartikkelit olivat kulmikkaita eik\u00e4 n\u00e4ytteest\u00e4 l\u00f6ydetty py\u00f6reit\u00e4 partikkeleita. Sile\u00e4pintaisten n\u00e4ytteiden keskim\u00e4\u00e4r\u00e4iset v\u00e4\u00e4nt\u00f6momentit olivat suuria johtuen kulumapartikkeleiden puutteesta jauhamispinnalla.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Friction between large moving tectonic plates is thought to be high but the lack of corresponding frictional heat suggests otherwise. The lack of friction could be explained by smaller rock fragments being rounded and acting as ball-bearings between the plates. To study rock fragmentation and friction a special apparatus called Stonegrinder was built. It grinds two drill core rock samples against each other and measures the changes in friction.\r\n\r\nRough surfaced gneiss samples were ground under two conditions: constant normal force, and constant normal pressure. Smooth surfaced gneiss samples were ground under constant normal force and pressure. Torque and the magnitude of temperature change were found to be inversely dependent on the compressive pressure. The coefficient of friction was independent of pressure and temperature. Wear particles imaged with X-ray tomography were found to be angular instead of spherical. Smooth surfaced samples had high mean torques due to the lack of wear particles.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Joonas Pylv\u00e4inen (joilpylv) on 2016-12-20 17:12:02.165189. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2016-12-20T17:12:03Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201612205205.pdf: 14476187 bytes, checksum: 4c53b2c68f6a5e9308aeca202094f242 (MD5)\r\nlicense.html: 4819 bytes, checksum: 69e40a7df5fde3a181da942800e42fd4 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2016-12-20T17:12:03Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201612205205.pdf: 14476187 bytes, checksum: 4c53b2c68f6a5e9308aeca202094f242 (MD5)\r\nlicense.html: 4819 bytes, checksum: 69e40a7df5fde3a181da942800e42fd4 (MD5)\r\n Previous issue date: 2016", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (82 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Kitka", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "tribologia", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "tektoniikka", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kivet", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Rock friction measurements with stonegrinder apparatus", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201612205205", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Soveltava fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Applied Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2016-12-20T17:12:04Z", "language": "", "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4023", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kitka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "tribologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "tektoniikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kivet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
|