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Relevant bibliographies by topics / Tower Hill

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Academic literature on the topic 'Tower Hill'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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Journal articles on the topic "Tower Hill"

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Kolaj, Michal, and John Adams. "Dynamic characteristics of Canada's Parliament Hill towers from ambient vibrations and recorded earthquake data." Canadian Journal of Civil Engineering 48, no. 1 (January 2021): 16–25. http://dx.doi.org/10.1139/cjce-2018-0474.

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The dynamic properties of Parliament Hill’s buildings (Ottawa, Canada) are of particular interest due to their important heritage value and because of the seismic retrofit project currently underway. To measure the dynamic properties directly, ambient vibration data were collected within the Peace Tower of Centre Block and the South-West Tower of East Block and processed together with weak to strong ground motions from six earthquakes. Both datasets found the fundamental mode to be 1.0–1.15 Hz for the Peace Tower and 2 Hz for the South-West Tower. The 2010 magnitude 5 Val-des-Bois earthquake induced peak accelerations of 49% g and 18% g in the top floors of the Peace and South-West towers, respectively, triggering a nonlinear response, causing the frequencies of the dominant modes to be reduced by 10%–15%. The reduction in frequency was temporary and the frequencies returned to baseline values, suggesting that there was no permanent structural damage.

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Rothman, D. "The Waterfall A Fire Tower Upon A Hill." Interdisciplinary Studies in Literature and Environment 13, no. 2 (July 1, 2006): 257–58. http://dx.doi.org/10.1093/isle/13.2.257.

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D'Costa, D. M., P. Edney, A. P. Kershaw, and P. De Deckker. "Late Quaternary Palaeoecology of Tower Hill, Victoria, Australia." Journal of Biogeography 16, no. 5 (September 1989): 461. http://dx.doi.org/10.2307/2845109.

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Matchan, Erin L., David Phillips, Fred Jourdan, and Korien Oostingh. "Early human occupation of southeastern Australia: New insights from 40Ar/39Ar dating of young volcanoes." Geology 48, no. 4 (February 6, 2020): 390–94. http://dx.doi.org/10.1130/g47166.1.

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Abstract In Australia, the onset of human occupation (≥65 ka?) and dispersion across the continent are the subjects of intense debate and are critical to understanding global human migration routes. New-generation multi-collector mass spectrometers capable of high-precision 40Ar/39Ar dating of young (<500 ka) samples provide unprecedented opportunities to improve temporal constraints of archaeological events. In southeastern Australia, a novel approach to improving understanding of occupation involves dating key volcanic eruptions in the region, referenced to stone artifacts and Aboriginal oral traditions. The current study focuses on two monogenetic volcanoes in the Newer Volcanic Province of southeastern Australia: Budj Bim (previously Mount Eccles) and Tower Hill. Budj Bim and its surrounding lava landforms are of great cultural significance and feature prominently in the oral traditions of the Gunditjmara people. Tower Hill is of archaeological significance due to the occurrence of a stone tool beneath tephra. 40Ar/39Ar eruption ages of 36.9 ± 3.1 ka (95% confidence interval) and 36.8 ± 3.8 ka (2σ) were determined for the Budj Bim and Tower Hill volcanic complexes, respectively. The Tower Hill eruption age is a minimum age constraint for human presence in Victoria, consistent with published optically stimulated luminescence and 14C age constraints for the earliest known occupation sites in Tasmania, New South Wales, and South Australia. If aspects of oral traditions pertaining to Budj Bim or its surrounding lava landforms reflect volcanic activity, this could be interpreted as evidence for these being some of the oldest oral traditions in existence.

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Verdiani, Giorgio, Martina Carrara, and Stefano Lami. "Destroyed Places and Ancient Wars. Digital Tools for the Montecastrese Fortress." Studies in Digital Heritage 1, no. 2 (December 14, 2017): 518–36. http://dx.doi.org/10.14434/sdh.v1i2.23221.

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In the XX century, after being forgotten for centuries, a series of archaeological excavations have brought to light the settlement, named “Montecastrese”, a system of Medieval fortifications organized on the top of a hill near the town of Camaiore, on the Tirreno sea. The archaeologists brought back to light the traces of the fortress and of the village, exploring the monumental ruins of the northern tower, still in place and tumbled down in two main large parts. In the first half of the XIII century, the castle of Montecastrese was conquered and destroyed by the army of Lucca. At the time of its major development the small fortress was organized around two main towers, with walls and various houses. A quite extended village was placed on the southern side of the hill. In 2015 the municipality of Camaiore commissioned a complete digital survey to the Dipartimento di Architettura in Florence. The general survey plan has seen the use of aerial photogrammetric survey, 3D laser scanner survey and terrestrial photogrammetry. The use of 3D modeling of all the lost parts, from the houses to the defense walls, to the system of towers was one of the focal point in this work, using the modeling process from the survey and supporting the reconstruction hypothesis with previous archaeological data, while matching the missing parts with similar architectures and the needs of the medieval defense/attack techniques. For the northern tower a specific operation based on the use of 3D printed models was brought on to bring to an end the debate about the sequence of the fall of the tower, quite important to the digital reconstruction of this building, the direct manipulation of a scaled model turned out to be a fundamental step for the completion of this part of the research.

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Jensen, Oskar Cox. "Joseph Johnson's Hat, or, The Storm on Tower Hill." Studies in Romanticism 58, no. 4 (2019): 545–69. http://dx.doi.org/10.1353/srm.2019.0030.

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Romakkaniemi, Sami, Zubair Maalick, Antti Hellsten, Antti Ruuskanen, Olli Väisänen, Irshad Ahmad, Juha Tonttila, Santtu Mikkonen, Mika Komppula, and Thomas Kühn. "Aerosol–landscape–cloud interaction: signatures of topography effect on cloud droplet formation." Atmospheric Chemistry and Physics 17, no. 12 (June 30, 2017): 7955–64. http://dx.doi.org/10.5194/acp-17-7955-2017.

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Abstract. Long-term in situ measurements of aerosol–cloud interactions are usually performed in measurement stations residing on hills, mountains, or high towers. In such conditions, the surface topography of the surrounding area can affect the measured cloud droplet distributions by increasing turbulence or causing orographic flows and thus the observations might not be representative for a larger scale. The objective of this work is to analyse, how the local topography affects the observations at Puijo measurement station, which is located in the 75 m high Puijo tower, which itself stands on a 150 m high hill. The analysis of the measurement data shows that the observed cloud droplet number concentration mainly depends on the cloud condensation nuclei (CCN) concentration. However, when the wind direction aligns with the direction of the steepest slope of the hill, a clear topography effect is observed. This finding was further analysed by simulating 3-D flow fields around the station and by performing trajectory ensemble modelling of aerosol- and wind-dependent cloud droplet formation. The results showed that in typical conditions, with geostrophic winds of about 10 m s−1, the hill can cause updrafts of up to 1 m s−1 in the air parcels arriving at the station. This is enough to produce in-cloud supersaturations (SSs) higher than typically found at the cloud base of ∼ 0.2 %), and thus additional cloud droplets may form inside the cloud. In the observations, this is seen in the form of a bimodal cloud droplet size distribution. The effect is strongest with high winds across the steepest slope of the hill and with low liquid water contents, and its relative importance quickly decreases as these conditions are relaxed. We therefore conclude that, after careful screening for wind speed and liquid water content, the observations at Puijo measurement station can be considered representative for clouds in a boreal environment.

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Bronkhorst, Remco, and Jorn Seubers. "La Torretta della Bufalotta: stille getuige van een verdwenen landschap." Paleo-aktueel, no. 30 (December 14, 2019): 31–38. http://dx.doi.org/10.21827/pa.30.31-38.

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La Torretta della Bufalotta: silent witness to a lost landscape. In the 1890s, the Dominican Father Peter Paul Mackey located the remains of the protohistoric settlement of Crustumerium, on a small hill ca. 15 km north of Rome crowned by picturesque ruins, amongst which the medieval so-called Torretta (tower) della Bufalotta. His identification was close yet incorrect. As was shown in the 1970s, Crustumerium lay some 450 m to the northwest. In this article, we delve into the remains of this torretta – which in fact was never a tower – and its surrounding surface materials which, taken together, testify to a complicated history spanning more than 2000 years.

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Sorić, Sofija. "Kaštel Sv. Mihovila na otoku Ugljanu." Ars Adriatica, no. 2 (January 1, 2012): 85. http://dx.doi.org/10.15291/ars.441.

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The fort of St Michael is situated on the prominent hill of the island of Ugljan off the coast of Zadar. This position is strategically important because it enables control of navigation in the entire Zadar archipelago, and this was the fort’s main role throughout history, especially during the period of conflict between Zadar and Venice. The fort owes its name to the Benedictine monastery which stood within the fort until the fifteenth century. The exact time of the founding of the monastery, or the construction of the fort, are not known. The fort is first mentioned in the Venetian chronicles of 1345 and 1346, when it was conquered during the siege of Zadar. After partial destruction, the fort underwent an intense renovation campaign in the second half of the fourteenth century. Late fourteenthcentury documents provide evidence about the building works on the main tower and houses for the crew which were carried out by the local builders: the Bilšić brothers and Nikola Arbusjanić. Fortification walls with five regularly-spaced towers form an irregular polygonal ground plan which was adapted to the terrain of the hill. The fort walls have been preserved to the height of the walkway with partially preserved castellations. The best-preserved parts are two south-western square towers with Gothic vaults composed of pointed arches, and the south-eastern portion of the walls with a walled-up entrance, defended by a massive main tower. The church of St Michael which stood at the centre of the fort was completely destroyed in bombing raids during the Second World War. Its modest remains, together with extant drawings and descriptions, show a small single-cell structure with a semicircular apse and indications of Gothic style evident in the pointed arches of the portal and windows. Its construction has been dated to the mid-fourteenth century. The fort has been well-preserved to date and represents the largest medieval fort on the Zadar islands.

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Roy, L. Somi. "A Window on the World: A Remote Corner of Asia Puts on a Play about 9/11." TDR/The Drama Review 48, no. 2 (June 2004): 68–75. http://dx.doi.org/10.1162/105420404323063409.

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This installment of Critical Acts tours the apartment of Marvin Carlson, where Helen Paris, Leslie Hill, and Lois Weaver offer On the Scent, a piece of installation-theatre of smell-filled rooms; a sumaang leela performance about the events of 9/11 that toured the isolated state of Manipur, India, the home of one of the Trade Tower victims who worked at Windows on the World; and iMumbo Jumbo, a production by Third World Bunfight, a South African theatre troupe.

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Dissertations / Theses on the topic "Tower Hill"

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李潔安 and Kit-on Niko Li. "Comprehensive restoration plan for Signal Tower at Signal Hill, Tsimshatsui." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B42181549.

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Li, Kit-on Niko. "Comprehensive restoration plan for Signal Tower at Signal Hill, Tsimshatsui." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B42181549.

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Stretch, Eleanor Eunice, and mikewood@deakin edu au. "Using site as the medium of image-making at Tower Hill." Deakin University. School of Contemporary Arts, 2000. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20050902.144857.

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Tanous, Helen Stone. "Myth, Logic, and the Monster." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1243016152.

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Books on the topic "Tower Hill"

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Pinborough, Sarah. Tower Hill. New York: Leisure Books, 2008.

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Orth, Karin. The geology of Tower Hill. East Melbourne, Vic: Geological Survey of Victoria, Dept. of Industry, 1990.

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Council, Knowsley (England) Metropolitan Borough. Tower Hill environmental action plan. [Knowsley]: [Metropolitan Borough of Knowsley], 1985.

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Shoesmith, R. Howle Hill, Herefordshire: Report of investigations into a collapse underneath a services trench tower. Hereford: City of Hereford Archaeology Unit, 1997.

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From the Tower of Babel to Parliament Hill: How to be a Christian in Canada today. Toronto: HarperCollins, 1997.

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Bacot, H. Parrott. Louisiana art from the Roger Houston Ogden collection: A joint exhibition held at the Anglo-American Art Museum, Memorial Tower, and Hill Memorial Library, Louisiana State University, Baton Rouge, Louisiana, September 13-November 15, 1992. Baton Rouge, La: The University, 1992.

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7

Bernd, Becher. Bernd & Hilla Becher: Typologien = typologies. München: Schirmer/Mosel, 1999.

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Karner, Frank R., ed. Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131.

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Klaus, Bussmann, and Biennale di Venezia, (44th : 1990), eds. Bernd & Hilla Becher: Tipologie = Typologien = typologies. Bonn: Auftrag des Auswärtigen Amtes, 1990.

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President, Sierra Leone Office of the. State opening of the fourth session of the fifth Parliament of the Republic of Sierra Leone by His Excellency the President Major-General Dr. Joseph Saidu Momoh, G.C.R.S.L., D.C.L., at Parliament Building, Tower Hill, Freetown on Friday, 2nd June, 1989 at 10:00 a.m. Freetown, Sierra Leone: G.P.O., 1989.

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Book chapters on the topic "Tower Hill"

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Acharyya, Rana, and Arindam Dey. "Influence of Footing Typologies on the Stability of a Transmission Tower Resting on the Bench of a Hill Slope." In Challenges and Innovations in Geomechanics, 423–30. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64518-2_50.

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Karner, Frank R., Gloria A. Pederson, and Marilyn R. Shultz. "Glossary of places and people of the Black Hills." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 21–28. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0021.

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Karner, Frank R., and Don L. Halvorson. "IGC Field Trip T131: Devils Tower and the Missouri Buttes." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 67–69. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0067.

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Karner, Frank R. "IGC Field Trip T131: Devils Tower—Black Hills alkalic igneous rocks and general geology." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 1–2. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0001.

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Karner, Frank R. "IGC Field Trip T131: Geological framework of the Black Hills—Bear Lodge Mountains region." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 3–6. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0003.

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Karner, Frank R., and Richard L. Patelke. "IGC Field Trip T131: General geology of the Black Hills and Bear Lodge Mountains." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 7–20. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0007.

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Karner, Frank R. "Field guide day 1: Geology of the precambrian rocks of the Keystone region." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 29–32. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0029.

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Karner, Frank R., and Richard L. Patelke. "Field guide day 2: Geology of the precambrian rocks of the Custer region, Hot Springs Mammoth site and Wind Cave." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 33–40. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0033.

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Karner, Frank R., and Stanley F. White. "Field guide day 3: Geology of the Badlands region and the mesozoic-paleozoic rocks of Boulder Canyon." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 41–44. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0041.

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Karner, Frank R. "Activities guide day 4: United States Independence Day and geological and cultural features of the Deadwood region." In Devils Tower—Black Hills Alkalic Igneous Rocks and General Geology, 45. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft131p0045.

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Conference papers on the topic "Tower Hill"

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Kiff, Robin, and Matthew Campbell. "An Agent-Based Approach to Synthesizing Structures." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46049.

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This paper discusses a new method for the automated synthesis of structures. By creating a framework to implement the synthesis, several methods are compared for the application of building tall self-supporting towers. These towers are evaluated in a physics simulation and comprised of multiple nodes and connections. In this paper, a new agent-based method is compared to existing search methods including random search, A*, and Hill-Climbing search. With the agents making local changes to nodes in the tower, the method achieves better results with less time and memory.

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Giamello, Marco, Stefano Columbu, Fabio Gabbrielli, Sonia Mugnaini, and Andrea Scala. "Le tenaci malte della torre del castello di Cerreto Ciampoli (Siena, Italia)." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11495.

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Strong mortars from the tower of the Cerreto Ciampoli castle (Siena, Italy)Known since the eleventh century, the castle of Cerreto Ciampoli was one of the main fortifications of the ancient Republic of Siena (Tuscany, Italy). The magnificent ruins, located on the top of a hill overlooking the Chianti Mountains, consist of two city walls, a door, a church, the remains of some rooms and a mighty tower lying on the ground broken up into five sections of several meters in length. The present study is focused on the analysis of the mineralogical-petrographic and chemical features of the sack and the bedding mortars of the tower, and it is aimed at understanding the exceptional qualities of these mortars that, during the collapse of the artifact, prevented the tower from shattering into smaller pieces. The tenacity of these mortars appears to be the result of the concurrence of more expedients, such as the choice of well-selected materials (hydraulic limes obtained from the local Alberese limestone, sandy aggregates from well-rinsed river sands with a high silicoclastic component) and the use of particular technical methods (i.e. hot lime technique).

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Del Rey, Miguel, Antonio Gallud, and Silvia Bronchales. "Una torre en la muralla de Biar. Consolidación y recuperación de una imagen urbana." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11353.

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A tower in the wall of Biar. Consolidation and recovery of an urban imageThe wall of Biar goes around the historical part of the city and connects it with the castle at the top of the hill. This urban wall was comprised by the city wall and a walk wall, which were protected by a battlement and a series of towers. Currently, the urban wall has been swallowed by changes in the area. Internal edifications to the city wall have progressively taken over the wall and, in its outside part, an area as wide as the towers has been occupied, which has eventually set up the front part of Torreta street. The Tower of Jesus is part of this defensive set that nowadays is almost invisible. Before its restoration, the tower was in an unfortunate state of abandonment and deterioration. Large cracks in its masonry warned of its immediate collapse. After its defensive use, it was transformed and joined to more modern neighboring buildings. Removed walls, deformed gaps and variations in the roof concealed its past as it went unnoticed and passed as another house on the street. Only the traces in its walls exposed its history. The intervention process for its recovery began with a thorough, formal, dimensional and technical study, to subsequently propose its restoration and the choice of contiguous elements that had to be eliminated to show a recognizable set. Also, a new way of walking and using it was put forward. During the intervention, several objectives were considered. In addition to the most obvious ones, such as the structural consolidation that would prevent its eventual collapse, recovering its historical image and showing the key facts that would lead to interpreting its past and discovering its secrets. Besides describing in detail the restoration process in its entirety, this text aims to present the issues that were raised during the intervention and to consider those reasons behind all the decisions that were made.

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Del Rey, Miguel, and Antonio Gallud. "Intervención en el Castillo de Biar. Consolidación de una ruina como alternativa posibilista en la defensa del patrimonio." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11352.

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Biar's Castle intervention. Consolidation of a ruin as a possibilist alternative in the defense of heritageConsolidation of ruin and didactic recovery of the castle's profile dominating the landscape. Almohad fortress that should have been recorded at the beginning of the powerful existing tower, surrounded by a protective wall with adarve, all on steep rocks. The fortress is transformed over time, being in service as a defense between Muslim Spain and Christian Spain in the twelfth and thirteenth centuries, to later, be a point of friction between the Kingdoms of Castilla and Aragón, remaining active until the mid-sixteenth century, with an intervention in the nineteenth century during the Carlist wars. Is located on the top of a hill at 745 m altitude, next to the town. The orography marks a deep slope to the northeast, more than 100 m high, while to the west, falling towards the population, the slope is smoother. Because of its situation, the castle has a very important visual impact, so landscape considerations acquire a special meaning. The intervention is partial on the second walled enclosure and in total ruin, proposing an eloquent restoration that allows to approach its complex history and the construction techniques used, within a strong economy of means in the project and subsequent maintenance. We can restore the image of the courtyard, its spatiality and know the remains of existing buildings. Both, the remnants emptying of crashes, and the restoration of the traces of the internal walls, the various heights of the walls and their guard steps, allow us to understand the whole along the time. The undoubted visual and landscape interest of Biar Castle is a relevant aspect of the intervention.

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Mussari, Bruno. "Architettura e vicende costruttive della Rocca di Capalbio (GR): un modello di torrione quattrocentesco ai confini della Repubblica senese." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11488.

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Architecture and construction events of the fortress of Capalbio (GR): a fifteenth century tower model on the borders of the Republic of SienaCapalbio (GR) is located in the heart of the southern Maremma, along the border strip that in the second half of the fifteenth century marked the line between the Republic of Siena –became part of the Grand Duchy of Tuscany with the peace of Cateau-Cambrésis of 1559– and the Papal State. The historic center, built around the hill on which it stands, enclosed by a double circle of walls, emerges in the skyline of the surrounding landscape. The fortified structure of Capalbio has a non-simple construction history, especially for the remote phases, but that gradually becomes simpler from the second half of the sixteenth century. The reasons why the defence structure was built were exhausted in a relatively short period of time. The advent of firearms and the evolution of the tools and techniques to which the art of war used, as is well known, imposed a radical transformation of military architecture, which only in some cases, responding to a necessarily changed strategy, they were updated or completely renewed. The fortress of Capalbio was not part of the renovation program and this decision allowed the Maremma village to maintain its historic medieval core until the modern era. The results of this research derive from the identification and study of fifteenth century construction accounting documents, compared with the structures that still exist. It was thus possible to retrace the main construction and transformation phases of the fortified complex, identifying the period in which it was built. Finally, it is not by chance that in that context the fortress of the Rocca replicates a reiterated model, probably due to the widespread use of Ticino and itinerant Lombard workers, also documented on this site.

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Argentini, Tommaso, Claudio Montagna, and Daniele Rocchi. "Feasibility study of wind tunnel aeroelastic tests on bridges with floating towers." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2650.

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<p>Floating towers are an innovative design solution for long-span bridges crossing deep waters, where grounded towers are not applicable. This kind of structural solution brings about challenging issues related to the design of such structures exposed to the combined action of aerodynamic forces and hydrodynamic forces. One of the major issues is the experimental validation of numerical models to simulate the structural dynamics, based on hybrid codes joining aero-elastic and hydro-elastic interactions.</p><p>This paper presents a feasibility study of wind-tunnel aeroelastic tests, where the submerged part of the bridge is simulated by Hardware-In-the-Loop (HIL) technology: actuators simulates the motion of the floater due to the combined action of the hydrodynamic loads on the floater (numerically simulated in real time) and of the aerodynamic and inertial loads transmitted by the tower (measured by a 6-components dynamometer). A similar HIL testing device has been developed at POLIMI in the field of floating offshore wind turbines, and it is likely to be applied to long-span bridges, as a tool for the experimental validation of complex numerical hybrid approaches.</p><p>The opportunities offered by this technology will be discussed in the paper, working out a numerical example where the full-scale response of a FEM of the full-bridge is simulated and then it is scaled in order to assess the feasibility of aeroelastic tests in wind tunnel, with a focus on the characteristics of the actuation system for the tower base: necessary of degrees of freedom, amplitude and bandwidth of motion and force.</p>

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Zhang, Chuntao, and Junjie Wang. "Study on Wind-Induced Fatigue of UHV Transmission Tower-Line Coupled System in Hilly Terrain Wind Field." In 2018 International Conference on Mathematics, Modelling, Simulation and Algorithms (MMSA 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/mmsa-18.2018.31.

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Heinold, Kirk, Meghashyam Panyam, and Amin Bibo. "Modeling Considerations for Testing Full-Scale Offshore Wind Turbine Nacelles With Hardware-in-the-Loop." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22514.

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Abstract When compared to open-loop configuration, full-scale wind turbine nacelle testing with Hardware-In-the-Loop (HIL) configuration allows for coupled electro-mechanical as well as full operational certification tests with the native nacelle controllers. This configuration requires a full turbine real-time simulation running in parallel to the nacelle under test. In this study, a baseline simulation model is used to investigate the nacelle fidelity necessary to capture dynamic characteristics of interest while meeting the real-time requirements. The same model is also utilized to understand the influence of different boundary conditions seen by the nacelle when mounted on a test bench without a rotor, tower, and platform. The results show that the torsional dynamics are mainly governed by the flexibility of the main shaft and the gearbox supports. It is also demonstrated that the abstraction of the nacelle leads to a torsional frequency shift and higher frequency content in component responses necessitating compensation techniques for proper implementation of HIL testing.

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Mileto, Camilla, Fernando Vegas, Lidia García-Soriano, and Salvador Tomás Marquez. "El Castillo de La Vilavella (Castellón). Estudios y primeras actuaciones de conservación." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11399.

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The Castle of La Vilavella (Castellón). Surveys and first conservation actionsThe castle of La Vilavella (Castellón) stands on the slopes of San Sebastián, and its various constructions follow the craggy relief of the hill, on the outskirts of the town to the west. The castle is currently an imposing ruin on top of a hill, a landmark which dominates the inland landscape as well as the plains to the sea. Part of the castle’s walled complex, which stretches along 230 m of the local topography with a maximum width of 60 m, is conserved. The walled complex incorporates a sequence of towers of different types, forms, and constructive techniques which reflect the different periods in which the complex was built. This article aims to present the conservation project carried out in the castle, as well as the prior analyses and completed work based on these. The starting point for this conservation project was that the actions on a major heritage asset such as this constitute another phase for learning about its material history. They also make it possible to continue research into its material and constructive history through new archaeological excavations such as the study of its constructive elements. The interventions carried out aim to respect the construction of the castle at both a material and aesthetic level, returning it to a physical condition which honours its history and helps prolong its useful life. The conservation work carried out, necessary to ensure consolidation, has focused mostly on the walls of the different structures and adaptation and musealisation actions of the castle complex.

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Langaker, John T., Christopher Hamker, and Ralph Wyndrum. "Challenges in Designing and Building a 700 MW All-Air-Cooled Steam Electric Power Plant." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55251.

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Large natural gas fired combined cycle electric power plants, while being an increasingly efficient and cost effective technology, are traditionally large consumers of water resources, while also discharging cooling tower blowdown at a similar rate. Water use is mostly attributed to the heat rejection needs of the gas turbine generator, the steam turbine generator, and the steam cycle condenser. Cooling with air, i.e. dry cooling, instead of water can virtually eliminate the environmental impact associated with water usage. Commissioned in the fall of 2010 with this in mind, the Halton Hills Generating Station located in the Greater Toronto West Area, Ontario, Canada, is a nominally-rated 700 Megawatt combined cycle electric generating station that is 100 percent cooled using various air-cooled heat exchangers. The resulting water consumption and wastewater discharge of this power plant is significantly less than comparably sized electric generating plants that derive cooling from wet methods (i.e, evaporative cooling towers). To incorporate dry cooling into such a power plant, it is necessary to consider several factors that play important roles both during plant design as well as construction and commissioning of the plant equipment, including the dry cooling systems. From the beginning a power plant general arrangement and space must account for dry cooling’s increase plot area requirements; constraints therein may render air cooling an impossible solution. Second, air cooling dictates specific parameters of major and auxiliary equipment operation that must be understood and coordinated upon purchase of such equipment. Until recently traditional wet cooling has driven standard designs, which now, in light of dry cooling’s increase in use, must be re-evaluated in full prior to purchase. Lastly, the construction and commissioning of air-cooling plant equipment is a significant effort which demands good planning and execution.

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