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[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Uljas, Jere", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2019-09-11T04:25:33Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2019-09-11T04:25:33Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2019", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/65473", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "L\u00f6ik\u00f6 m\u00f6rk\u00f6 sis\u00e4\u00e4n? Laukominen on j\u00e4\u00e4kiekossa yleisin tapa tehd\u00e4 maali, ja maalit ratkaisevat j\u00e4\u00e4kiekko-otteluita sek\u00e4 maailmanmestaruuksia. Mit\u00e4 kovempi laukaus on, sit\u00e4 v\u00e4hemm\u00e4n maalivahdilla on aikaa reagoida torjuakseen kiekon. Kiekon nopeutta on mitattu monilla eri tavoilla. T\u00e4m\u00e4n tutkimuksen tarkoituksena oli selvitt\u00e4\u00e4, kuinka tarkasti mailaan kiinnitett\u00e4v\u00e4ll\u00e4 liikesensorilla voidaan mitata kiekon nopeutta, ja mitk\u00e4 ovat mittaustavan suurimmat virhel\u00e4hteet.\r\nTutkimukseen osallistui 10 j\u00e4\u00e4kiekkoilijaa. Pelaajien taso vaihteli harrastajista puoliammattilaisiin. Tutkittavista jokainen laukoi ly\u00f6nti- n\u00e4p\u00e4ytys- ja rannelaukauksia kutakin 10 kappaletta sek\u00e4 luistimilla vauhdilla, luistimilla ilman vauhtia, ett\u00e4 kengill\u00e4 ilman vauhtia, jolloin laukauksia kertyi 90. Laukauksista mitattiin kaksiulotteisella videoanalyysill\u00e4 mailan taipumat sek\u00e4 kiekon nopeudet, tutkalla kiekon nopeudet sek\u00e4 voima-anturilla varren taipumisvoima. Liikesensorilla mitattiin mailan liikett\u00e4, josta pyrittiin arvioimaan kiekon nopeutta.\r\nMailan liikenopeudesta johdetut algoritmit korreloivat vahvasti videonopeuden kanssa (Alg1: R=0,682, p<0,001, N=388; Alg2: R=0,691, p<0,001, N=386). Kun huomioon otettiin vain yli 60 Hz n\u00e4ytteenottotaajuudella mitatut laukaukset, korrelaatiot olivat vahvempia (Alg1: R=0,798, p<0,001, N=110; Alg2: R=0,788, p<0,001, N=110), mutta eiv\u00e4t kuitenkaan yht\u00e4 vah- voja kuin tutkan ja videoanalyysin v\u00e4lill\u00e4 (R=0,936, p<0,001, N=740). Huonoilla n\u00e4ytteenottotaajuuksilla Algoritmien virhe kasvoi merkitsev\u00e4sti niiden yliarvioidessa kiekon nopeutta. Liikesensorin virhe n\u00e4ytti johtuvan osin siit\u00e4, ett\u00e4 se mittaa vain mailan liikenopeudesta aiheutunutta kiekon nopeutta, jolloin silt\u00e4 j\u00e4\u00e4 havaitsematta mailan taipumasta sek\u00e4 kiekkokontaktin laadusta johtuvat vaikutukset kiekon nopeuteen. Se ei my\u00f6sk\u00e4\u00e4n ota huomioon mailan j\u00e4ykkyyden ja oteleveyden vaikutusta mailan dynamiikkaan, joka vaikuttaa mailan liikenopeuden ja kiekon nopeuden v\u00e4liseen suhteeseen.\r\nLiikesensorilla voidaan mitata j\u00e4\u00e4kiekon laukauksia. Sen tarkkuus ei ole samaa luokkaa videoanalyysin tai tutkan kanssa, mutta sen vahvuus on monipuolisuus mailan k\u00e4yt\u00f6n mittaamisessa verrattuna tutkaan, ja k\u00e4yt\u00f6n helppous verrattuna videoanalyysiin. Lis\u00e4ksi se mahdollistaa mailan liikkeen tarkemman mittaamisen. Nykyisess\u00e4 tuotteessa on my\u00f6s paljon potentiaalia kehitty\u00e4 tarkemmaksi kiekon nopeuden mittausmenetelm\u00e4ksi, kun kehitet\u00e4\u00e4n algoritmin laskentakaavaa, n\u00e4ytteenottotaajuutta ja pystyt\u00e4\u00e4n ottamaan huomioon erilaisia muuttujia kuten mailan j\u00e4ykkyys ja oteleveys.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2019-09-11T04:25:33Z\r\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2019-09-11T04:25:33Z (GMT). No. of bitstreams: 0\r\n Previous issue date: 2019", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "81", "language": "", "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": "kiihtyvyysanturi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "liikesensori", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "laukaus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "validiteetti", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Liikesensori j\u00e4\u00e4kiekon laukauksen mittaamisessa", "language": "", "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-201909114091", "language": "", "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": "Liikuntatieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Liikunta- ja terveystieteet", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomekaniikka", "language": "fi", "element": "subject", "qualifier": 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null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "5012", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mailat", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "algoritmit", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4\u00e4kiekko", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "nopeus", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "korrelaatio", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "anturit", "language": "", "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mittaus", "language": "", "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.rights.accessrights", "value": "The author has not given permission to make the work publicly available electronically. Therefore the material can be read only at the archival workstation at Jyv\u00e4skyl\u00e4 University Library (https://kirjasto.jyu.fi/en/workspaces/facilities).", "language": "en", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "Tekij\u00e4 ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyv\u00e4skyl\u00e4n yliopiston kirjaston arkistoty\u00f6semalta. Ks. https://kirjasto.jyu.fi/fi/tyoskentelytilat/laitteet-ja-tilat..", "language": "fi", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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