3,687 research outputs found
Class-specific biomechanical characteristics of double poling in elite Paralympic Nordic sit-skiers
No full textINTRODUCTION: Spinal cord injury people and others (e.g. amputees), showing different impairments, are participating in the same Paralympic Nordic sit-skiing race. A used classification system (5 groups; LW10-10,5-11-11,5-12) based on classification tests, trying to consider the athletes’ impairment and functional potential, should provide fair competitions with using a corresponding time percentage system (1). Defining clear disability criteria and a basis to classify athletes grounded on their individual functional limitations, demands for better sitskiing specific empirical evidence as the established class distribution may leave room for interpretations (2). While classification lab tests improve (3), the sportspecific functional differences during sit-ski double poling on snow in athletes with different impairments are not fully understood with a lack of studies (4). As part of a larger project, the aim of this study was to biomechanically examine sit-ski double poling on snow at different terrains and speeds. METHODS: 17 (13 male; 4 female; 7 nations) elite sit-skiers (LW10-LW12) volunteered during on snow skiing in the Vuokatti Ski tunnel on flat and uphill (3°) terrain at different speeds (flat/uphill_4.5/4m/s-90%vmax-vmax). A kinematic 2D video analyses (50Hz) was performed (3 video cameras in series perpendicular to track; recording in sagittal plane) and videos were analyzed using the APAS-System (Ariel Dynamics Inc., USA), with main focus on trunk, elbow, hip and pole angle variables. Forces (1000 Hz) were measured by a custom made light-weight pole force system (University of Salzburg/Jyväskylä, AUT/FIN). RESULTS: Results for different classes are presented mainly descriptive (small N) for flat terrain at 4.5 m/s and v_max. Trunk angle characteristics (e.g. ROM_flex/ext, TAmin, TAmax) where not clearly discriminating all classes from each other, while e.g. LW10 showed an early backwards movement (upper body extension) during poling vs. a clear trunk flexion-extension pattern in LW 12 for a more efficient force production, connected to smaller pole angles to the ground. Elbow angle patterns showing the stretch-shortening cycle characteristics were individual (flexion vs. no flexion) and different between LW10 and 12, but not always discriminating classes. DISCUSSION/CONCLUSION: The small number of skiers in some classes makes the interpretation difficult and partly vague. From a sit-ski specific functional point of view not all used classes can be clearly discriminated from each other and the influence of impairment on force production and performance has to be further investigated in a bigger group of sit-skiers. REFERENCES: 1. Pernot, H.F.M. et al., 2011, Spinal Cord, 49(8), 935-941; 2. Vanlandewijck Y. et al., 2011, J of Spo Scie, 29, 1089-1096; 3. Rosso V. et al., Abstractbook–ICSS2016, p.93; 4. Gastaldi, L., et al., 2012, Clin J of Spo Med, 22(1), 58–64
Valores de referencia del litro de leche cruda
No full textEl IAPUCo (Instituto Argentino de Profesores Universitarios de Costos) y el INTA
(Instituto Nacional de Tecnología Agropecuaria), a través de este boletín, pretenden
generar y difundir información comparable del valor de referencia del litro de leche
cruda a nivel primario e industrial que contribuya a la toma de decisión del sector
público y privado relacionado con la producción de leche.EEA ParanáFil: Engler, Patricia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Parana; Argentina.Fil: Gastaldi, Laura Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Marino, Magdalena Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Agencia de Extensión Rural Coronel Brandsen; ArgentinaFil: Cartier, Enrique. Instituto Argentino de Profesores Universitarios de Costos (IAPUCo). Dirección de Estudios de Costos Mesoeconómicos (DECOM); Argentin
Valores de referencia del litro de leche cruda
No full textEl IAPUCo (Instituto Argentino de Profesores Universitarios de Costos) y el INTA
(Instituto Nacional de Tecnología Agropecuaria), a través de este boletín, pretenden
generar y difundir información comparable del valor de referencia del litro de leche
cruda a nivel primario e industrial que contribuya a la toma de decisión del sector
público y privado relacionado con la producción de leche.EEA ParanáFil: Engler, Patricia Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Parana; Argentina.Fil: Gastaldi, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Marino, Magdalena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimenatal Agropecuaria Pergamino. Agencia de Extensión Rural Coronel Brandsen; Argentina.Fil: Cartier, Enrique Nicolás. Instituto Argentino de Profesores Universitarios de Costos (IAPUCO); Argentin
Collective Improvisation: The Practice and Vision of Ingemar Lindh
No full textIngemar Lindh's research on the principles of collective improvisation and performance conceived as process announce an important development in the 20th-century tradition of the actor's work. After early studies with Étienne Decroux and working collaborations with Jerzy Grotowski, Eugenio Barba, and Yves Lebreton, Lindh founded the first laboratory theatre in Sweden in 1971, the Institutet för Scenkonst. His practice of collective improvisation is viewed in light of postdramatic concerns such as its resistance to fixed scores, directorial montage, and choreography as an organizing principle
Different sitting positions influence cross country sit skiers performance: Sitting position influence on force generation and cycle characteristics
No full textCross country sit skiing is a Paralympic discipline in which athletes due to physical impairment ski sitting on a sit-ski. The impairment influences performance directly and also through sitting position. Athletes with a better trunk control usually adopt a sitting position called “kneeing” in which the hip joints are higher than the knee joints. In contrast, athletes with high impact of impairment prefer a sitting position called “knee high” in which the hip joints are lower than the knee joints. Able bodied athletes skiing on the ergometer in these two sitting positions showed different performance. However, to the best of authors’ knowledge, no studies have examined performance, force production, and cycle characteristics of athletes with physical impairment who ski using different sitting positions. Therefore, the aim of the present study is to assess if athletes with physical impairment sitting in “kneeing” and “knee high” position perform differently while skiing. To obtain this purpose, a k-means cluster analysis was used to group ten male athletes according to their skiing performance in terms of maximal speed, generated force, and cycle characteristics. Cluster analysis results showed athletes aggregation in two clusters and a very high agreement between clusters analysis outcome and real athletes sitting position. Maximal speed and generated force were the most relevant variables for grouping athletes. Despite some limitations, these results suggest that the cluster analysis can be used to discriminate athletes according to their performance
From electrophilic to stereospecific SN2 alpha-functionalization reactions of acyclic carboxylic acid derivatives
No full textAuthor Magdalena Piringer, BScMasterarbeit Universität Linz 202
Conversion and Artistic Creation of Magdalena V.
No full textThis Bachelor thesis Conversion and Artistic Creation of Magdalena V. deals with the change of artistic expression of the Czech graphic artist Magdalena V., in a close connection to her religious conversion to the Catholic faith. The first part summarizes the theoretical knowledge of the psychology of religion. It introduces basic definitions and concepts of religion in relation to a religious conversion. In the second part, the author deals with the psychological analysis of Magdalena V.'s typical work through her life, which is supported by numerous photographs. Using the approach of rožnovská school, the author attempts to interpret this artwork on a hypothetical level, focusing on the M.V.'s life and artistic paralel before and after her conversion. The author draws on Magdalena V.'s testimonies about her life which bring light on the intention and context in her art. Related to the author's identification with Magdalena V.'s work, which later became apparent, this paper evolved further into identifying these moments and thus the potential risks inherent in author's own therapeutic work
From electrophilic to stereospecific SN2 alpha-functionalization reactions of acyclic carboxylic acid derivatives
No full textAuthor Magdalena Piringer, BScMasterarbeit Universität Linz 202
The Development of Sculpture in the Quito School
No full textMagdalena Gallegos de Donoso, Ecuadorian anthropologist and art historian, author of over fifty exhibition catalogues, Director of the Central Bank of Ecuador Museums
First person – Magdalena Woloszynska
No full textABSTRACT
First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Magdalena Woloszynska is the first author on ‘The Elongator complex regulates hypocotyl growth in darkness and during photomorphogenesis’, published in Journal of Cell Science. While completing this work, Magdalena was a postdoctoral fellow in the Chromatin and Growth Control group at the VIB-UGent Center for Plant Systems Biology at Ghent University, Belgium. Her research interests include plant molecular biology, epigenetics, transcriptomics, plant physiology and plant mitochondria.</jats:p
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