| fullrecord |
[{"key": "dc.contributor.author", "value": "Kulmala, Juha-Pekka", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2009-04-14T14:43:33Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2009-04-14T14:43:33Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2006", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/19903", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Pes\u00e4pallon ly\u00f6nti on vaativa suoritus, jota on tutkittu hyvin v\u00e4h\u00e4n. Ly\u00f6nnin onnistumiseksi osuma palloon on ensisijaisen t\u00e4rke\u00e4\u00e4. Ly\u00f6nnin kovuus m\u00e4\u00e4r\u00e4ytyy osuman lis\u00e4ksi l\u00e4hinn\u00e4 mailan nopeudesta. Ly\u00f6nnin t\u00e4rkein vaihe on ly\u00f6ntikierto, jonka aikana ly\u00f6j\u00e4n t\u00e4ytyy siirt\u00e4\u00e4 vauhdin horisontaalinen nopeus vartalon oikea-aikaiseksi kiertonopeudeksi ja edelleen k\u00e4sien kautta mailan kulmanopeudeksi. T\u00e4m\u00e4n tutkimuksen tarkoituksena oli selvitt\u00e4\u00e4 pes\u00e4pallon ly\u00f6nnin tekniikkaa tarkastelemalla ly\u00f6ntikierron aikaista vartalon asentoa sek\u00e4 eri segmenttien ja mailan nopeuksia sek\u00e4 liikkeiden ajoitusta. Koehenkil\u00f6in\u00e4 toimi viisi pes\u00e4palloilijaa, jotka suorittivat useita ly\u00f6ntej\u00e4 valitsemistaan sy\u00f6t\u00f6ist\u00e4. Ly\u00f6ntisuoritukset kuvattiin kahdella high speed -kameralla (200 Hz) sivusta etu- ja takaviistosta ly\u00f6ntisuuntaan n\u00e4hden. Liikeanalyysill\u00e4 tarkasteltavaksi suoritukseksi valittiin ly\u00f6nti, jossa pallon l\u00e4ht\u00f6nopeus tutkalla mitattuna kasvoi suurimmaksi. Vartalonkierto alkoi ensin lantiosta, jonka suurin keskim\u00e4\u00e4r\u00e4inen kiertonopeus oli 563 \u00b0/s. Seuraavaksi kiertyiv\u00e4t hartiat ja k\u00e4det saavuttaen kiertonopeudet 1006 \u00b0/s ja 1456 \u00b0/s . Viimeisen\u00e4 alkoi mailan heilautus 0.08 s ennen osumaa. Mailan suurin lineaarinen nopeus 47.2 m/s ajoittui keskim\u00e4\u00e4rin 0.015 s ennen osumaa. Osumahetkell\u00e4 mailan ja k\u00e4sien v\u00e4linen j\u00e4tt\u00f6kulma oli 128\u00b0. Pallon keskim\u00e4\u00e4r\u00e4inen l\u00e4ht\u00f6nopeus oli 43.4 m/s (155.9 km/h). Mailan p\u00e4\u00e4n nopeuden nousu lis\u00e4si lineaarisesti pallon l\u00e4ht\u00f6nopeutta. Voima mailan heilautukselle tuotettiin kineettisen ketjun avulla, jonka toiminnassa on melko suuria yksil\u00f6llisi\u00e4 eroja. Kovassa ly\u00f6nniss\u00e4 vartalon ja erityisesti ranteiden toiminnan oikea ajoitus n\u00e4ytt\u00e4isi olevan merkitt\u00e4v\u00e4ss\u00e4 roolissa.", "language": "en_US", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2009-04-14T14:43:33Z (GMT). No. of bitstreams: 1\nCL Kulmala BME.pdf: 400867 bytes, checksum: aa5b6e01379f8158388f5f447f9f9bd2 (MD5)\n Previous issue date: 2006", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "33 s.", "language": null, "element": "format", "qualifier": "extent", "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": "pes\u00e4pallo", "language": "en_US", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ly\u00f6nti", "language": "en_US", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "tekniikka", "language": "en_US", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "liikeanalyysi", "language": "en_US", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Pes\u00e4pallon perusly\u00f6nnin liikeanalyysi", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "bachelor thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-20094141427", "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": "Bachelor's thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Kandidaatintutkielma", "language": "fi", "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": "Liikuntabiologian laitos", "language": "fi", "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": "Valmennus- ja testausoppi", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_7a1f", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "bachelorThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
|