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The Global ETD Search service is a free service for researchers
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Showing 1 to 4 of 4 (0.057 seconds)Spelling suggestions: "subject:"žingsnis"" "subject:"žingsnių""
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Erdvinių paviršių geometrinių parametrų matavimo tyrimas ir tobulinimas / Research and improvement of measuring the geometrical parameters of spatial surfacesMariūnas, Darius 13 October 2005 (has links)
The task of the work is to investigate efficiency and effectiveness of measurement operations due to possibilities to select an optimal pitch of measurement and change it in-operation according to the newly developed algorithm or strategy of measurement. The task of the investigation would also be to present recommendations for measurements of planes or 3D measurements in machine engineering and instrumentation, geodesy and surveying, structure industry.
The present work pursues the following objectives:
• the analysis of the ways leading to the most cost-effective selection of planar and three-dimensional surface measurement tests;
• the identification of optimal frequency in the tested space by determining the measurement discretization pitch and associating its value with the nature of the deviations measured;
• cutting down the measurement time without any loss in deviations’ assessment accuracy by undertaking investigations into the effect of the nature of the deviation function upon the value of the discretization pitch as well as by developing new procedures and algorithms to cut down measurement time;
• the submission of the recommendations how to reduce the number of measurement tests and ensure optimal measurement time in machine and instrument manufacture process, in construction and geodesy.
The created integrally and differentially modified discretization methods make it possible to cut down the time of measurement of the object without any loss of quality of... [to full text]
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Erdvinių paviršių geometrinių parametrų matavimo tyrimas ir tobulinimas / Research And Improvement of Measuring The Geometrical Parameters of Spatial SurfacesMariūnas, Darius 12 October 2005 (has links)
The task of the work is to investigate efficiency and effectiveness of measurement operations due to possibilities to select an optimal pitch of measurement and change it in-operation according to the newly developed algorithm or strategy of measurement. The task of the investigation would also be to present recommendations for measurements of planes or 3D measurements in machine engineering and instrumentation, geodesy and surveying, structure industry.
The present work pursues the following objectives:
• the analysis of the ways leading to the most cost-effective selection of planar and three-dimensional surface measurement tests;
• the identification of optimal frequency in the tested space by determining the measurement discretization pitch and associating its value with the nature of the deviations measured;
• cutting down the measurement time without any loss in deviations’ assessment accuracy by undertaking investigations into the effect of the nature of the deviation function upon the value of the discretization pitch as well as by developing new procedures and algorithms to cut down measurement time;
• the submission of the recommendations how to reduce the number of measurement tests and ensure optimal measurement time in machine and instrument manufacture process, in construction and geodesy.
The created integrally and differentially modified discretization methods make it possible to cut down the time of measurement of the object without any loss of quality of... [to full text]
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Širdies susitraukimų dažnio ir žingsnių parametrų sąsajos atliekant Conconi testą / The links of heart rate and step parameters in the Conconi testŠliževičiūtė, Nora 20 June 2012 (has links)
Tyrimo hipotezė: atliekant laiptiškai sunkėjantį krūvį, pasiekus LKS, turėtų atsirasti pokyčiai žingsnio parametruose.
Tyrimo tikslas: nustatyti širdies susitraukimų dažnio ir žingsnių parametrų sąsajas atliekant Conconi testą. Siekiant šio tikslo buvo užsibrėžti šie uždaviniai:
1. Nustatyti ir įvertinti ŠSD pokyčius Conconi testo metu ir nustatyti La kaupimosi slenksčius.
2. Nustatyti ir įvertinti žingsnio parametrų (žingsnio dažnio, žingsnio ilgio, atramos trukmės ir polėkio trukmės) pokyčius Conconi testo metu.
3. Nustatyti sąsajas tarp ŠSD ir žingsnio parametrų Conconi testo metu.
Tiriamąją imtį sudarė 8 vyrai – ištvermės atstovai bėgikai, kurie atliko Conconi testą. Tiriant buvo naudojamas ActiGraph ActiTrain prietaisas, kuriuo registravome ŠSD ir žingsnių dažnį. Kinematiniams parametrams išmatuoti naudojome dvi, 100 Hz dažnio sinchronines kameras, kuriomis fiksavome žingsnio parametrus. Šiuos parametrus, specializuotą judesių analizės programą SIMI MOTION 2D, apskaičiavome atramos, polėkio ir žingsnio trukmes (s), žingsnio ilgį (m), žingsnio dažnį (k/s) ir bėgimo greitį (m/s). La slenksčio nustatymui naudojome Orgin 6.0 programą. Rodiklių sąsajos kaitai vertinti pasinaudojome Kauno mokslininkų (Vainoras ir kt. 2008) sukurta matricinės analizės metodika.
Tyrimo rezultatai parodė, kad nuosekliai didėjant bėgimo greičiui ir pasiekus 14.57±1.47 km/h bėgimo greitį, pradeda kauptis laktatas, tuo pat metu ŠSD būna 171.91±7.66 t/min. Maksimalus ŠSD - 195.14±6.32 t/min... [toliau žr. visą tekstą] / The hypothesis of the work: there should be an appearance of changes in step parameters when reaching VMS while performing activities with gradual increase of workload.
The aim of the work is to determine the links of heart rate and step parameters in the Conconi test. To achieve this aim we have been established the following objectives:
1. Identify and evaluate changes in heart rate and the La accumulation thresholds during the Conconi test.
2. Identify and evaluate the parameters of step (step frequency, stride length, head length and flight time) changes during the Conconi test.
3. Identify the relationship between heart rate and steps parameters.
The sample consisted of 8 men - representatives of endurance runners who have completed the Conconi test. During the test was used an ActiGraph ActiTrain device, which registered the heart rate and steps rates. To measure the kinematic parameters, we used two synchronous cameras of 100 Hz, which recorded the steps parameters. These parameters with an specialized motion analysis program SIMI MOTION 2D we calculated the support, enthusiasm and step time (s), stride length (m), step frequency (t/s) and running speed (m/s). To determinate the La threshold we uses a 6.0 Orgin program. To evaluate the indicators of the interface changes we took advantage the analysis of a matrix methodology scientist of Kaunas (Vainoras et al. 2008).
The results have shown that lactate begins to accumulate at a consistent increase in running speed... [to full text]
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Kriminalistinė homoskopinių pėdsakų charakteristika ir tyrimo galimybės / Characteristics of homoscopic traces and possibilities of their investigation from the point of view of forensicsGargasaitė, Akvilė 25 June 2014 (has links)
Šiame magistro baigiamajame darbe nagrinėta pakankamai nauja tema ,,Kriminalistinė homoskopinių pėdsakų charakteristika ir tyrimo galimybės“, kadangi Lietuvos kriminalistinėje literatūroje nėra aptinkamos tokios sąvokos kaip homoskopinis pėdsakas, nors yra mokslinių darbų, kuriuose tas pats pėdsakas vadinamas homeoskopiniu. Homoskopiniai pėdsakai yra žmogaus kūno dalimi palikti pėdsakai, kurie skirstomi į rankų, kojų (basų kojų pėdsakai, kartais randami ir avalynės viduje), dantų, nagų ir galvos paviršiaus pėdsakus. Pirmoje darbo dalyje trumpai išdėstyta, kas yra pėdsakai nagrinėjamos temos prasme bei pėdsakų rūšys. Vėliau aptariama kiekviena iš homoskopinių pėdsakų rūšių anatomiškai bei kriminalistiniu požiūriu – pateikiama pėdsakų charakteristika. Rankų pėdsakai yra dažniausiai aptinkami, tiriami bei pagal juos lengviausia identifikuoti asmenį, todėl jie yra aptarti pirmiausiai. Toliau yra pateikiamos kojų, dantų, nagų bei galvos paviršiaus (svarbiausias vaidmuo tenka lūpų bei ausų pėdsakams) pėdsakų charakteristikos. Pagal juos taip pat galima nustatyti asmens tapatybę, tačiau tai padaryti yra sunkiau nei rankų pėdsakų atveju. Kita vertus, gali būti nustatyta daug informacijos apie atskiras nusikalstamos veikos aplinkybes. Antroje darbo dalyje nurodyta, kokiose įstaigose Lietuvoje yra atliekami specialisto tyrimai bei ekspertizės. Be to, pateiktos homoskopinių pėdsakų tyrimo galimybės surandant, išryškinant, fiksuojant, paimant bei tiriant laboratoriniu būdu homoskopinius... [toliau žr. visą tekstą] / A quite new subject “Characteristics of Homoscopic Traces and Possibilities of their Investigation from the Point of View of Forensics” was analyzed in this master’s thesis, whereas it cannot be found such a concept as homoscopic trace, although there is some scientific work in which the same trace is called homeoscopic. Homoscopic traces are the ones that are left by human body parts and they are divided into handprints, footprints (barefoot and footprints in footwear), bite marks, fingernail scrapings and prints that are left by a surface of a head. The first part briefly sets out what is the meaning of the traces and their types within the topic of the thesis. Also each kind of the homoscopic traces are discussed anatomically and from the point of view of forensics, thus the characteristics of homoscopic traces are given. At first handprints are discussed because they are mostly detected and examined. Furthermore by using them it is easy to identify a person. Then the characteristics of footprints, bite marks, fingernail scrapings and prints left by a surface of a head (especially lip prints and ear prints) are represented. Using them we can also determine person’s identity but it is more difficult than using handprints. On the other hand, we can learn some information about individual circumstances of the crime. The institutions in Lithuania in which specialists’ researches and forensics are carried out are noted in the second part of master’s thesis. In addition, the... [to full text]
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