TY  - CHAP
A1  - Altay, Okyay
A1  - Butenweg, Christoph
A1  - Klinkel, Sven
T1  - Vibration mitigation of wind turbine towers by a new semiactive Tuned Liquid Column Damper
T2  - 6. Word Congress on Structural Control and Monitoring, 15 - 17 July, 2014 Barcelona,Spain
Y1  - 2014
ER  - 
TY  - CHAP
A1  - Altay, Okyay
A1  - Butenweg, Christoph
A1  - Klinkel, Sven
A1  - Taddei, Francesca
T1  - Vibration mitigation of wind turbine towers by tuned liquid column dampers
T2  - Proceedings of the 9th European Conference on Structural Dynamics, EURODYN 2014 Porto, Portugal, 30 June - 2 July 2014 / A. Cunha, E. Caetano, .... (eds.)
Y1  - 2014
SN  - 978-972-752-165-4
SP  - 1531
EP  - 1538
CY  - Porto
ER  - 
TY  - CHAP
A1  - Altay, Okyay
A1  - Taddei, Francesca
A1  - Butenweg, Christoph
A1  - Klinkel, Sven
T1  - Vibration mitigation of wind turbine towers with tuned mass dampers
T2  - Wind turbine control and monitoring. (Advances in industrial control)
N2  - Because of its minor environmental impact, electricity generation using wind power is getting remarkable. The further growth of the wind industry depends on technological solutions to the challenges in production and construction of the turbines. Wind turbine tower vibrations, which limit power generation efficiency and cause fatigue problems with high maintenance costs, count as one of the main structural difficulties in the wind energy sector. To mitigate tower vibrations auxiliary measures are necessary. The effectiveness of tuned mass damper is verified by means of a numeric study on a 5 MW onshore reference wind turbine. Hereby, also seismic-induced vibrations and soil–structure interaction are considered. Acquired results show that tuned mass damper can effectively reduce resonant tower vibrations and improve the fatigue life of wind turbines. This chapter is also concerned with tuned liquid column damper and a semiactive application of it. Due to its geometric versatility and low prime costs, tuned liquid column dampers are a good alternative to other damping measures, in particular for slender structures like wind turbines.
Y1  - 2014
SN  - 978-3-319-08412-1 (Print) ; 978-3-319-08413-8 (E-Book)
U6  - http://dx.doi.org/10.1007/978-3-319-08413-8_12
SP  - 337
EP  - 373
PB  - Springer
CY  - Cham ; Heidelberg ; New York ; Dordrecht ; London
ER  - 
TY  - JOUR
A1  - Fredebeul-Krein, Markus
A1  - Steingröver, Markus
T1  - Wholesale broadband access to IPTV in an NGA environment : how to deal with it from a regulatory perspective?
JF  - Telecommunications Policy
Y1  - 2014
U6  - http://dx.doi.org/doi:10.1016/j.telpol.2013.04.002
SN  - 0308-5961 (Print)
SN  - 1879-3258 (Online)
VL  - 38
IS  - 3
SP  - 264
EP  - 277
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Sterck, Frank J.
A1  - Wegner, L.
A1  - de Vries, Sven M. G.
A1  - von Arx, G.
A1  - Mohren, Godefridus M. J.
A1  - den Ouden, Jan
A1  - Sass-Klaassen, Ute G. W.
T1  - Wood structural differences between northern and southern beech provenances growing at a moderate site
JF  - Tree Physiology
Y1  - 2014
U6  - http://dx.doi.org/10.1093/treephys/tpu069
SN  - 1758-4469  (Online)
SN  - 0829-318X (Print)
VL  - 34
IS  - 8
SP  - 882
EP  - 893
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Hoehr, Cornelia
A1  - Paulßen, Elisabeth
A1  - Benard, Francois
A1  - Lee, Chris Jaeil
A1  - Hou, Xinchi
A1  - Badesso, Brian
A1  - Ferguson, Simon
A1  - Miao, Qing
A1  - Yang, Hua
A1  - Buckley, Ken
A1  - Hanemaayer, Victoire
A1  - Zeisler, Stefan
A1  - Ruth, Thomas
A1  - Celler, Anna
A1  - Schaffer, Paul
T1  - ⁴⁴ᶢSc production using a water target on a 13 MeV cyclotron
JF  - Nuclear medicine and biology
N2  - Access to promising radiometals as isotopes for novel molecular imaging agents requires that they are routinely available and inexpensive to obtain. Proximity to a cyclotron center outfitted with solid target hardware, or to an isotope generator for the metal of interest is necessary, both of which can introduce significant hurdles in development of less common isotopes. Herein, we describe the production of ⁴⁴Sc (t₁⸝₂ = 3.97 h, Eavg,β⁺ = 1.47 MeV, branching ratio = 94.27%) in a solution target and an automated loading system which allows a quick turn-around between different radiometallic isotopes and therefore greatly improves their availability for tracer development. Experimental yields are compared to theoretical calculations.
Y1  - 2014
U6  - http://dx.doi.org/10.1016/j.nucmedbio.2013.12.016
SN  - 1872-9614
VL  - 41
IS  - 5
SP  - 401
EP  - 406
PB  - Elsevier
CY  - Amsterdam
ER  -