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[{"key": "dc.contributor.advisor", "value": "K\u00e4rkk\u00e4inen, Salme", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Vikstedt, Marko", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-10-12T12:46:20Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-10-12T12:46:20Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2015", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1497474", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/47293", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Ker\u00e4tt\u00e4v\u00e4n tiedon m\u00e4\u00e4r\u00e4 kasvaa jatkuvasti ja siten my\u00f6s tutkittavien aineistojen koko kasvaa. Suurien ja monimutkaisten aineistojen tehokkaaseen analysointiin tarvitaan menetelmi\u00e4, joilla aineiston muuttujien v\u00e4liset assosiaatiot voidaan tunnistaa. Tunnistamalla aineistosta mielenkiintoisimmat assosiaatiot voidaan jatkotutkimukset kohdentaa niihin, jolloin s\u00e4\u00e4styy resursseja ja aikaa. Moniulotteinen korrespondenssianalyysi kuuluu n\u00e4ihin eksploratiivisiin menetelmiin. T\u00e4ss\u00e4 tutkielmassa menetelm\u00e4\u00e4 sovelletaan Suomen ymp\u00e4rist\u00f6keskuksen (SYKE) tuottamaan pohjael\u00e4inaineistoon.\n\nAineisto koostuu mittauksista, jotka on tehty Suomen jokien koskialueilla. Koskialueita on 590 ja n\u00e4ist\u00e4 on ker\u00e4tty 5552 n\u00e4ytett\u00e4 vuosina 2006 - 2012. Koskialueista otetuista n\u00e4ytteist\u00e4 on tunnistettu ja laskettu niiss\u00e4 esiintyv\u00e4t pohjael\u00e4intaksonit, joita on 161 eri taksonia. Jokaiselle n\u00e4ytteelle tiedet\u00e4\u00e4n lis\u00e4ksi koskialueen jokityyppi, pohjatyyppi, luonnontilaisuus sek\u00e4 sijoittuminen Etel\u00e4- tai Pohjois-Suomeen. Tutkielman tavoitteena on selvitt\u00e4\u00e4 pohjael\u00e4inaineistoon liittyvi\u00e4 assosiaatioita, erityisesti liittyen hienoaines- ja kivipohjatyyppeihin. J\u00e4lkimm\u00e4inen jaotellaan viel\u00e4 iso- ja pienkivityyppeihin.\n\nMoniulotteisessa aineistossa olevaa informaatiota pyrit\u00e4\u00e4n tiivist\u00e4m\u00e4\u00e4n moniulotteisella korrespondenssianalyysilla helposti tulkittaviksi useimmin kaksiulotteisiksi kuviksi. Kuvia kutsutaan menetelm\u00e4n yhteydess\u00e4 kartoiksi, ja ne kuvaavat muuttujien v\u00e4lisi\u00e4 assosiaatioita tiivistettyn\u00e4 kahden suurimman selitysosuuden omaavalle dimensiolle eli aliavaruudelle. Aliavaruudet m\u00e4\u00e4ritet\u00e4\u00e4n muuttujien avulla. Tutkielmassa k\u00e4ytet\u00e4\u00e4n pohjael\u00e4intaksoneita my\u00f6s lis\u00e4muuttujina, jotka voidaan piirt\u00e4\u00e4 kartalle, mutta ne eiv\u00e4t vaikuta dimensioiden m\u00e4\u00e4ritt\u00e4miseen.\n\nPohjatyyppien v\u00e4lill\u00e4 voidaan tulkita moniulotteisen korrespondenssianalyysin perusteella olevan eroa hienoaines- ja kivipohjatyyppien suhteen. Hienoaineksen erottuminen n\u00e4kyi kaikissa suoritetuissa analyyseissa. Kategorisia pohjael\u00e4inmuuttujia k\u00e4ytett\u00e4ess\u00e4 havaittiin m\u00e4k\u00e4rien (Simuliidae) olevan mahdollinen indikaattoritaksoni pohjatyyppien erottelussa hienoaines- ja kivipohjatyyppeihin.\n\nAnalyysitulosten perusteella voidaan my\u00f6s todeta olevan eroa Pohjois- ja Etel\u00e4-Suomen v\u00e4lill\u00e4 sek\u00e4 luonnontilaisten ja ihmistoiminnan kuormittamien koskipaikkojen v\u00e4lill\u00e4. Pohjois- ja Etel\u00e4-Suomen v\u00e4liselle jaolle voidaan tulosten perusteella esitt\u00e4\u00e4 indikaattoritaksoneiksi kahta p\u00e4iv\u00e4korentoa. Jokityypeist\u00e4 savimaiden joet erottuvat muista jokityypeist\u00e4 omana ryhm\u00e4n\u00e4\u00e4n.\n\nTutkielman tulosten perusteella voidaan ehdottaa lis\u00e4tutkimuksia siit\u00e4, mik\u00e4 erottaa hienoaineksen kivipohjatyypeist\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Marko Vikstedt (mamajuvi) on 2015-10-12 12:46:19.459585. 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 2015-10-12T12:46:20Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201510123350.pdf: 4404488 bytes, checksum: 0d38197ba3b238102eb90edc6c436095 (MD5)\nlicense.html: 4839 bytes, checksum: 32416e144036bac822be1f64cd6a915a (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-10-12T12:46:20Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201510123350.pdf: 4404488 bytes, checksum: 0d38197ba3b238102eb90edc6c436095 (MD5)\nlicense.html: 4839 bytes, checksum: 32416e144036bac822be1f64cd6a915a (MD5)\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (57 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.subject.other", "value": "moniulotteinen korrespondenssianalyysi", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Moniulotteinen korrespondenssianalyysi : sovelluksena jokien pohjael\u00e4inaineisto", "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-201510123350", "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": "Matematiikan ja tilastotieteen laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Mathematics and Statistics", "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": "Tilastotiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Statistics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2015-10-12T12:46:21Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.collaborator", "value": "public", "language": null, "element": "contractresearch", "qualifier": "collaborator", "schema": "yvv"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "yvv.contractresearch.initiative", "value": "university", "language": null, "element": "contractresearch", "qualifier": "initiative", "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": "4043", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ulottuvuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "pohjael\u00e4imist\u00f6", "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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