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[{"key": "dc.contributor.author", "value": "Harjupatana, Tero", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2013-01-15T07:03:18Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2013-01-15T07:03:18Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2012", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1241843", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/40692", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4n tutkielman t\u00e4rkeimp\u00e4n\u00e4 tavoitteena oli kehitt\u00e4\u00e4 menetelm\u00e4\nveden kulkeutumisen ja muodonmuutosten mittaamiseksi bentoniittin\u00e4ytteiss\u00e4\nr\u00f6ntgentomografialla. Menetelm\u00e4ll\u00e4 voitaisiin mitata ja\nker\u00e4t\u00e4 arvokasta kokeellista dataa ydinj\u00e4tteen loppusijoituksessa\nk\u00e4ytett\u00e4v\u00e4n bentoniittipuskurin toimintaa kuvaavien mallien kehitt\u00e4miseksi\nja testaamiseksi.\n\nR\u00f6ntgentomografialla n\u00e4ytteest\u00e4 saadaan kolmiulotteinen tomografiakuva,\nmiss\u00e4 kuvavokselin harmaas\u00e4vyarvo riippuu materiaaleista,\nja niiden tiheyksist\u00e4. Bentoniittin\u00e4ytteen kastuessa veden osatiheyden\nkasvu kasvattaa harmaas\u00e4vyarvoja, jolloin kastuneen ja kuivan\nn\u00e4ytteen v\u00e4linen erotuskuva voidaan kalibroida vastaamaan kolmiulotteista\nkosteuspitoisuusjakaumaa, mik\u00e4li n\u00e4ytteen kokonaisvesim\u00e4\u00e4r\u00e4\ntiedet\u00e4\u00e4n. Bentoniitissa tapahtuu yleens\u00e4 muodonmuutoksia\nkastumisen aikana, jolloin n\u00e4m\u00e4 t\u00e4ytyy mitata ja huomioida kosteuspitoisuuden\nm\u00e4\u00e4rityksess\u00e4. Bentoniittin\u00e4ytteit\u00e4 (12 kpl, halk. 17 mm,\nkork. 10 mm, kuivatiheydet 1,2 ja 1,5 g/cm3) kasteltiin vakiotilavuudessa\nn\u00e4ytteen alapinnan kautta (halk. 6 mm sintteri) keinotekoisella\npohjavedell\u00e4 muutamilla eri kastelupaineilla (0...8 bar). Kukin n\u00e4yte\nkuvattiin r\u00f6ntgenmikrotomografialla noin 10 kertaa sopivin v\u00e4lein,\np\u00e4\u00e4osin kahden viikon aikana. N\u00e4ytteenpidikkeit\u00e4 my\u00f6s punnittiin,\njolloin n\u00e4ytteeseen imeytyneen veden kokonaismassa tiedettiin. Bentoniittiin\nsekoitettiin mikrolasikuulia merkkipartikkeleiksi, jolloin\nmuodonmuutokset voitiin mitata yksinkertaista translaatioalgoritmia\nk\u00e4ytt\u00e4en.\n\nMenetelm\u00e4n huomattiin olevan herkk\u00e4 kuvissa oleville h\u00e4iri\u00f6ille, joita\nsyntyi todenn\u00e4k\u00f6isesti ep\u00e4stabiilin r\u00f6ntgenl\u00e4hteen vuoksi. Kun\nstabiloitumiseen k\u00e4ytett\u00e4v\u00e4\u00e4 aikaa kasvatettiin, h\u00e4iri\u00f6t v\u00e4heniv\u00e4t\nhuomattavasti. Mitatut muodonmuutokset olivat pieni\u00e4 ja vaikuttivat\nsilm\u00e4m\u00e4\u00e4r\u00e4isesti hyvilt\u00e4, mutta translaatioalgoritmin riitt\u00e4v\u00e4st\u00e4\ntarkkuudesta ei saatu varmuutta. Menetelm\u00e4 vaikuttaa muutoin toimivalta\nbentoniittin\u00e4ytteiden kosteuspitoisuuden m\u00e4\u00e4ritt\u00e4miseen,\nr\u00f6ntgenl\u00e4hteen stabiloitumista ja menetelm\u00e4n tarkkuutta olisi kuitenkin\nsyyt\u00e4 tutkia lis\u00e4\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Tero Harjupatana (hpatana) on 2013-01-15 07:03:16.327088. Form: Pro gradu -lomake (1 tekij\u00e4) (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake-1-tekijae). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2013-01-15T07:03:18Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201301151047.pdf: 11002320 bytes, checksum: 7d99f67a17d42fe987440bfd3ce9ab56 (MD5)\nlicense.html: 5048 bytes, checksum: 927e356387856e5f5cfc79539695ef00 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2013-01-15T07:03:18Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201301151047.pdf: 11002320 bytes, checksum: 7d99f67a17d42fe987440bfd3ce9ab56 (MD5)\nlicense.html: 5048 bytes, checksum: 927e356387856e5f5cfc79539695ef00 (MD5)\n Previous issue date: 2012", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "69 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": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Veden kulkeutumisen ja muodonmuutosten mittaaminen bentoniittin\u00e4ytteiss\u00e4 r\u00f6ntgentomografiamenetelm\u00e4ll\u00e4", "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-201301151047", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.dcmitype", "value": "Text", "language": "en", "element": "type", "qualifier": "dcmitype", "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": "2013-01-15T07:03:18Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"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": "r\u00f6ntgentutkimus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "bentoniitti", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "nesteet", "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"}]
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