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排序方式: 共有366条查询结果,搜索用时 232 毫秒
291.
Giovani dos Santos Cunha Marco Aurélio Vaz Walter Herzog Jeam Marcel Geremia Gabriela Tomedi Leites Álvaro Reischak-Oliveira 《Journal of sports sciences》2020,38(11-12):1286-1295
ABSTRACT This study investigated the effects of maturity status on knee extensor torque and vastus lateralis architecture of young soccer players. Thirty-four males aged 13–18 years were divided into two groups: pubescent (PUB, n = 15) and postpubescent (POSP, n = 19). Torque by angle interaction was established for absolute [F(2.649, 84.771) = 9.066, p < 0.05] and relative to body mass [F(2.704, 86.533) = 4.050, p < 0.05] isometric torque with the POSP group showing greater values. Muscle volume torque-angle relationship was similar between groups. Absolute, relative to body mass, and relative to muscle volume concentric and eccentric torque-velocity relationship showed a non-significant interaction but a significant group effect in favour the POSP group for absolute and concentric torque relative to body mass. Torque-angle and torque-velocity relationship normalized by body mass allometric exponents showed a non-significant interactions and group effects. Muscle thickness (3.6 ± 0.6 vs. 3.8 ± 0.6 cm), fascicle length (8.3 ± 1.4 vs. 8.9 ± 1.6 cm) and pennation angle (15.0 ± 2.3 vs. 14.3 ± 3.2 degrees) was similar between PUB and POSP groups, respectively. Maturity status did not show a significant effect on muscle architecture and on isometric and dynamic torques when allometrically normalized. 相似文献
292.
Marco Scholtz 《Journal of Sport Tourism》2019,23(4):181-202
ABSTRACTTo ensure the positive sentiment of residents towards sporting events, it is important to understand and manage the social impact perceptions generated by such events at the host destinations. The Comrades ultramarathon is a unique event which affects the residents of two cities at the same time, meaning that diversified social impact management approaches may be needed. The research revealed apparent differences in social impact perceptions among the two cities. Despite the Comrades, as it is colloquially termed, being a single event, diversified management approaches are therefore needed. This study furthermore reveals that the size and diversity of communities’ economies might influence residents’ social impact perceptions. 相似文献
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294.
Nasser Abu Zeid Marco Balducci Francesco Bartocci Roberto Regni Giovanni Santarato 《Journal of Cultural Heritage》2010,11(2):220-227
The electrical resistivity tomography (ERT) represents one of the widely used geophysical techniques for the exploration of the subsurface. In the last few years, this method has been demonstrated to be an efficient reconnaissance tool not only for monitoring degradation status of walls and foundations of historical buildings, but also for imaging the spatial distribution of injected mortar, commonly employed for consolidation purposes. A 3D resistivity tomography survey was carried out on four selected wall portions of the historical church of Montepetriolo, Perugia, Central Italy. The obtained 3D resistivity distribution models before and after grouting provided suggestive images of the internal structure of the studied walls. Moreover, the spatial distribution of the zones being filled with mortar was determined quantitatively by scaling the post- to the preinjection resistivity values. Using a well known correlation between resistivity and porosity, established in the geophysical community, a further step towards a more quantitative assessment was attempted to indirectly determine the unit volumes of the injected mortar The obtained results were satisfactory and in some cases almost similar to the yard data. Furthermore, two flat-jack tests confirmed the local increment of the mechanical resistance of the studied left front (2) and right lateral (3) wall portions. 相似文献
295.
An advanced church heating system favourable to artworks: A contribution to European standardisation
Dario Camuffo Emanuela Pagan Sirkka Rissanen Łukasz Bratasz Roman Kozłowski Marco Camuffo Antonio della Valle 《Journal of Cultural Heritage》2010,11(2):205-219
The European project Friendly-Heating (FH): comfortable to people and compatible with conservation of artworks preserved in churches addressed the problems caused by the continuous or intermittent heating of historic churches, which disturbs the microclimatic conditions to which the building and the artworks preserved inside have acclimatised. As thermal comfort and the preservation of artworks often conflict with each other, a balance between the two needs is necessary. The proposed heating strategy is to provide a small amount of heat directly to people in the pew area while leaving the conditions in the church, as a whole, undisturbed. This novel heating system is based on some low-temperature radiant emitters mounted in a pew to provide a desirable distribution of heat to the feet, legs and hands of people occupying it. Due to little heat dispersion, this novel system not only significantly reduces the risk of mechanical stress in wooden artworks and panel or canvas paintings, fresco soiling and cyclic dissolution-recrystallization of soluble salts in the masonry, but is energy-efficient. The detailed environmental monitoring was conducted in the church of Santa Maria Maddalena in Rocca Pietore, Italy over a 3-year period to verify the performance of the novel heating system in comparison to the warm-air system that was active earlier in the church. The methodology and results of this comprehensive and multidisciplinary study were included in three draft standards of the European Committee for Standardisation intended for use in the study and control of environments of cultural heritage objects. 相似文献
296.
Adobe is a construction technique that uses raw earth mixed and moulded to form sun-dried blocks to realize a bearing wall. The recent discovery of adobe walls belonging to a Republican domus sited in Suasa (Ancona, Italy) was the starting point of the present work. The research was developed through an experimental approach, in order to characterize the mechanical behavior of this type of walls: firstly some adobe blocks similar to the original ones were reproduced by using the soil directly came from the archaeological site near the adobe walls and adding straw to reduce hygrometric shrinkage and coarse sand, taken from a local quarry, as a stabilizer, as Romans were used to do. Then, after a seasoning period of 4 months, four adobe walls were produced to be tested by compression and shear. From compression tests, maximum strength, first cracking compression stress, Young modulus and breaking manner were evaluated. As well, compression results show a possible two-storey structure of the earthen Republican domus. In fact, it appears that the stress from the two-storey load analysis is lower than the first cracking compression stress. From the shear tests, a proportional law seems to regulate the relation between the maximum value of the mean tangential tensions and the vertical compression the sample is subjected to. This could be the starting point for a future seismic analysis. 相似文献
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298.
Marco Briziarelli 《Journal of Radio & Audio Media》2016,23(2):349-363
This article illustrates the case Radio Alice, a “free radio” active in late 1970s Italy, which challenged traditional forms of thinking and doing broadcasting. The author discusses how the station utilized the airwaves first to constitute an alternative arena in which different voices, experiences, and social groups utilized radio as a 2-way communication device; second, to convey a new political sensibility and sense of sociability resembling a contemporary social network site. Ultimately, this case illustrates how radio can be understood as a modality of social interaction in its own right, rather than a mere distributor/amplifier of messages. 相似文献
299.
Giovanni Crisonà 《Educational Research for Policy and Practice》2017,16(1):95-107
Europe hosts a significant number of global organizations in the transport market, the largest industrial R&D investor in the EU. The market contains a significant number of jobs, and thus, there is a need for learning solutions in its domain. One of the pillars for its expansion is advanced manufacturing technology. The EU Commission considers the implementation and development of this as one of its trans-sectoral ‘key enabling technologies’. This article presents a non-government ‘Sector Skills Alliance’—Skillman—that addresses advanced manufacturing technology skill needs for the automotive, aerospace and train industries. Funded by the EU, Skillman connects companies and organizations in terms of scope of action, size, field of expertise and legal framework including, in particular, industry leaders, research centres, accreditation bodies and TVET providers. Jaguar Land Rover, FIAT-FCA and SAS, Scandinavian Airlines Systems are just some of the organizations that worked together to find solutions to skills mismatches and challenges the sector faces finding the right skills. This article analyses challenges associated with skills mismatch and solutions proposed by Skillman to help transitions to work after training. The article clarifies the processes behind the Alliance creation (starting from the EU Copenhagen Declaration), the aims and nature of the Alliance, the strategic tools implemented by Skillman, as well as its challenges and first results. The article also argues that the Skillman Alliance has the right characteristics to meet skills requirements and can be used as a model approach for easing the transition from training to work. 相似文献
300.
Organisation response to institutional pressures in Higher Education: the important role of the disciplines 总被引:1,自引:0,他引:1
How do Higher Education Institutions respond to steering attempts in different disciplines? How can different responses be explained? Case studies have been developed in the Italian Higher Education context and at the departmental level, with a focus on government interventions through funding and evaluation of research. The paper tests the predictions of the model proposed by Oliver (1991) to forecast acquiescence and resistance to external pressures, and develops a new model to interpret and predict organisational response from a wider perspective. 相似文献