bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fear and Hope
Authors: Spry Damien 
Published: January 2013

AbstractMobile media are increasingly ubiquitous in the lives of children and young people worldwide. In this chapter, Damien Spry uses case studies from Japan and Australia to examine moral panics and regulatory responses to “children”s use of mobile media. Emphasizing the politicization of young people's mobile media use, he argues that “childhood” and “new media” are discursive sites where the hopes and fears about future generations are powerfully expressed and negotiated. While there is a great deal of public discourse about children and mobile media, Spry notes the relative absence of young people's voices from this discourse, and questions how their voices might be more audible in the debates that affect them.
Entwicklung eines Hochleistungsverbundträgersystems für den Ingenieurholzbau
Authors: Rautenstrauch Karl , Kästner Martin , Jahreis Markus , Hädicke Wolfram 
Published: January 2013

AbstractAnspruchsvolle, weitgespannte Ingenieurholzkonstruktionen werden seit über 100 Jahren überwiegend unter Verwendung von Brettschichtholz realisiert. Durch Weiterentwicklung dieses homogenisierten Holzwerkstoffproduktes zu einem hybriden Hochleistungsbauteil können dem natürlichen Roh‐ bzw. Baustoff Holz weitere Anwendungsfelder erschlossen werden. Hierzu zählen insbesondere Leichtbaustrukturen mit gesteigerten Anforderungen hinsichtlich aufnehmbarer Lasten, größerer Spannweiten und/oder reduzierter Bauhöhe im Hoch‐, Industrie‐ und Straßenbrückenbau. Wesentliche Optimierungen der Biegetragfähigkeit und der Biegesteifigkeit können durch Verstärkung der Trägerrandbereiche mittels Hochleistungswerkstoffen erreicht werden. Im vorliegenden Beitrag werden innovative Konstruktionsansätze zur Herstellung hocheffizienter Hybridbauteile unter Verwendung von Holz als Hauptbaustoff, polymergebundenen mineralischen Deckschichten zur Druckzonenverstärkung sowie kohlefaser‐ resp. glasfaser‐ oder stahlverstärkten Furnierschichtholzlamellen zur Zugzonenverstärkung vorgestellt. Zusätzliche Verstärkungselemente steigern die Schubtragfähigkeit oder verbessern die Aufnahme der Querpressungen an den Auflagern.Development of a high‐performance hybrid beam system for timber engineeringFor over 100 years demanding long‐span constructions in timber engineering are mainly built using glulam. The further development of this homogenized engineered wood product into a hybrid high‐performance component creates new fields of application for wood as a natural raw and building material. This particularly includes lightweight constructions with increased demands in terms of load‐bearing capacity, longer spans and/or reduced height for building, industrial and bridge construction. Significant improvements of the flexural strength and stiffness can be achieved by reinforcements of the beam's edge zones using high‐performance materials. This article presents innovative construction approaches for the production of a highly efficient hybrid system made of wood as main material. The compression zone is reinforced by a layer of polymer concrete. The tension zone is strengthened either with CFRP‐, GFRP‐ or steel‐reinforced lamellas made of laminated veneer lumber (LVL). Additional reinforcing elements increase the shear resistance or improve the transverse load‐carrying capacity of the bearings.
Formholzrohre – Stand der Forschung und Anwendungen
Authors: Haller Peer , Putzger Robert , Wehsener Jörg , Hartig Jens 
Published: January 2013

AbstractDieser Beitrag vermittelt eine Übersicht über den Stand der Forschung zu Formholzrohren. Zu deren Herstellung werden Bohlen unter Hitze bis auf die Hälfte ihres Volumens verdichtet, in dünne Streifen aufgetrennt und zu einer Platte verleimt, dergestalt dass die Verdichtung quer zur Faser und in der Ebene der Platte verläuft. Anschließend wird diese bedampft und zu einem Rohr umgeformt, wobei man sich das Rückerinnerungsvermögen des verdichteten Holzes zunutze macht. Wahlweise können die Rohre später mit technischen Fasern verstärkt werden. Der Vorteil besteht darin, dass Profile verglichen mit Vollquerschnitten bei gleichem Materialeinsatz größere Flächenmomente und Tragfähigkeiten erreichen. Dieser Beitrag stellt Versuchsergebnisse zum Tragverhalten von Formholzrohren bei Druck, Torsion und Biegung sowie zu deren Dauerhaftigkeit vor. Es wird gezeigt, dass äußerliche Verstärkungen aus Glas‐ oder Kohlefasern und Kunstharzen die Tragfähigkeit, Duktilität, Dimensionsstabilität und Dauerhaftigkeit erhöhen. Ferner wird die Umweltleistung des Formholzrohres am Beispiel einer Stütze mit Ausführungen in Stahl und Stahlbeton verglichen. Letztlich werden potenzielle Anwendungen als Stütze, Mast oder Rohrleitung aufgezeigt. Eine erste Realisierung – der Schaft einer Windkraftanlage – wird kurz vorgestellt.Moulded wooden tubes – State of research and potential for applicationThis contribution gives an overview of the state of research on circular moulded wooden tubes with optional fibre reinforcement. Moulded wooden tubes are produced by forming of panels, which were densified previously to about one half of the initial volume transverse to grain. The resulting hollow sections have higher load‐bearing capacities compared to solid sections of the same material volume due to the larger moments of inertia. This paper shows results of experimental investigations regarding the load‐bearing behaviour of wooden tubes under compression, bending and torsion as well as the durability. Fibre reinforcements of glass or carbon and epoxy resin on the outer surface of the tubes increase the load‐bearing capacities, the ductility and the durability. Moreover, ecological aspects of wooden tubes compared to steel and steel‐reinforced concrete are pointed out. Finally, possible applications are addressed. A prototype of a wind energy plant with a shaft of wooden tubes is briefly presented.
Neue Lager für die Wuppertaler Schwebebahn
Authors: Kauschke Wolfgang 
Published: January 2013

AbstractDer Neubau der Wuppertaler Schwebebahn war Anlass für umfangreiche Versuche an runden bewehrten Elastomerlagern und an Druckstücken für Punktkipplager. Die wichtigsten allgemein interessierenden Ergebnisse der Versuche sind:– Die Rückstellmomente von bewehrten Elastomerlagern wurden bislang erheblich unterschätzt.– Der Einfluss der plastischen Verformung auf das Rückstellmoment von stählernen Druckstücken ist vernachlässigbar.Es wird über einen Teil der durchgeführten Versuche und deren Auswertung berichtet.New bearings for the overhead railway in Wuppertal – Part 1: compression‐tension‐bearingThe reconstruction of the overhead railway in Wuppertal was the occasion for extensive testing on circular laminated elastomeric bearings as well as on pressure pieces for point rocker bearings. The most important results of the tests are as follows:– up to now the restoring moments of laminated elastomeric bearings are considerably underestimated– the influence of plastic deformation on the restoring moments of steel point rocker bearings is negligible.The following report describes a part of the conducted tests and the analysis.
Vorgefertigte Holzfassadenelemente in der energetischen Modernisierung
Authors: Ott Stephan , Loebus Stefan , Winter Stefan 
Published: January 2013

AbstractDie Vorfertigung, eine im Neubau im Holzbau gängige Praxis, benötigt die Implementierung neuer Methoden, wenn sie auf die Modernisierung von Bestandsbauten übertragen wird. Daran forscht seit 2008 ein internationales Konsortium in den Projekten TES EnergyFacade und smartTES. Die TES‐Fassadenelemente für die energetische Modernisierung der Gebäudehülle aus vorgefertigten Holzelementen werden seither in mehreren Demonstrationsvorhaben in ihrer Anwendbarkeit erprobt, zudem werden Lösungen für spezifische Problemstellungen entwickelt. Der erste Schritt war die Definition eines integrativen Arbeitsprozesses von der Planung, dem digitalen Aufmaß, über die Vorfertigung zur Montage. Im Besonderen galt es den Verbindungs‐ und Anschlusspunkt der Fassadenelemente hinsichtlich des Montage‐ und Tragverhaltens zu entwickeln. Weitere Lösungen betreffen den Brandschutz, das thermisch‐hygrische Verhalten unter besonderen Klimabedingungen, die Integration konstruktiver und anlagentechnischer Komponenten, den Umgang mit bestehenden Bautypen und der ökologischen Qualität im Rahmen der Nachhaltigkeit. In diesem Beitrag wird die praktische Anwendung am Beispiel der Modernisierung eines sechsgeschossigen Mehrfamilienhauses im Detail erläutert.Prefabricated wooden façade elements for energy efficient retrofitPrefabrication, a well‐known concept in new timber construction – still needs the implementation of new methods in order to be applied in refurbishment projects. TES Energy Façade and the follow‐up smartTES, two international research consortia, work on this idea since 2008. Since then the TES façade elements for energy efficient retrofit of the building envelope with prefabricated timber‐based elements are demonstrated in several projects. A first milestone was the definition of an integrated work process starting from planning, digital survey, prefabrication and assembly. A key feature was the development of the joints of façade elements for certain assembly routines and structural properties. Further solutions are dealing with fire safety, thermal and moisture behavior in specific climate conditions, the integration of other components and building services, the adaption to existing building types, and the ecologic quality for sustainability. This report shows the application of TES in a refurbishment of a six storey dwelling.
Dauerhaftigkeit polymergetränkter AR‐Glas‐Bewehrungen in Beton – Materialauswahl und Lebensdauerprognose
Authors: Büttner Till , Raupach Michael 
Published: January 2013

AbstractDie bei Textilbetonbauteilen üblicherweise zum Einsatz kommenden Bewehrungen bestehen entweder aus Carbon oder AR‐Glas. Aufgrund des Preises und der Verfügbarkeit am Markt hat AR‐Glas gegenüber Carbon im Bereich des Neubaus allerdings eine deutlich größere Verbreitung am Markt. Trotz der chemischen Modifikation zur Verbesserung der Alkalibeständigkeit von AR‐Gläsern gegenüber E‐Glas kann bei AR‐Gläsern ein nennenswerter Festigkeitsverlust infolge der Alkalität des Betons innerhalb der üblichen Lebensdauer eines Bauwerks festgestellt werden. Eine Möglichkeit, den langfristigen Festigkeitsverlust zu reduzieren, ist der Aufbau einer Diffusionsbarriere um die einzelnen Rovings durch eine polymere Tränkung. Im Rahmen der vorliegenden Veröffentlichung werden mögliche Tränkungsmaterialien sowie die Auswirkungen dieser auf die Dauerhaftigkeit der textilen Bewehrungen anhand von Versuchen bewertet. Weiterhin werden ein Modell zur Prognose des langfristigen Festigkeitsverlustes polymermodifizierter Bewehrungen sowie Ergebnisse von Parameterstudien vorgestellt.Durability of polymer‐impregnated AR‐glass in textile reinforced concrete – material selection and long‐term predictionsTextile reinforced concrete (TRC) represents a new and innovative building material, in which the reinforced is made out of technical textiles. Technical textiles are made out of AR‐glass or carbon. Even when glass is considered to be alkali‐resistant (AR), the AR‐glass reinforcement shows a certain loss of tensile strength over the live time of a building member. This loss of strength is mainly caused by an alkaline attack of the glass network due to the high alkalinity of the pore solution of concrete. Due to the requirements of the load‐bearing capacity as well as the handling during the production of TRC building members, the reinforcement structures used meanwhile are mainly impregnated with polymers. Depending on the type of polymer, the polymer‐impregnation cannot only increase the load‐bearing capacity but can also decrease the loss of strength of AR‐glass due to a build‐up of a diffusion barrier around the reinforcement. In this paper different polymers, which can be used to impregnate the reinforcement, as well as their influence on the durability are presented. In addition a model, which can be used to predict the long term loss of strength of polymer‐impregnated AR‐glass is presented. Besides the model, results of parameter studies are shown.
Eine neue Bühne für den denkmalgeschützten Theatersaal
Authors: Herrmann Andreas , Dietz Markus , Lerner Bettina , Kalmbach Renate 
Published: January 2013

AbstractDie Baumaßnahme Neu‐ und Umbau des Theaters Heidelberg wurde auf einem innerstädtischen Baufeld realisiert, welches im Osten und Westen durch die Theater‐ bzw. Friedrichstraße, im Norden durch die direkt angrenzenden Nachbargebäude und im Süden durch einen öffentlichen Fußgängerweg begrenzt ist. Vor Beginn der eigentlichen Baumaßnahme wurden die nicht denkmalgeschützten Theaterbauten auf diesem Baufeld abgerissen. Die Bestandsgebäude entlang der Theaterstraße sowie das Gebäude Friedrichstraße 5 blieben erhalten und werden weiterhin für das Theater genutzt.A new stage for the listed hall of a theaterThe building plot for the new construction and remodeling of Heidelberg's theater is located in the inner city area. It is bordered by adjacent buildings on its northern side, by the two streets Theaterstraße and Friedrichstraße on its eastern and western side and a public walkway on its southern side. Before starting the new construction, the not listed parts of the existing theater had to be demolished. The remaining parts along Theaterstraße and Friedrichstraße have been conserved for the continued use of the theater.
Towards building a multi‐datacenter infrastructure for massive remote sensing image processing
Authors: Zhang Wanfeng , Wang Lizhe , Liu Dingsheng , Song Weijing , Ma Yan , Liu Peng , Chen Dan 
Published: January 2013

SUMMARYEarth observation applications are now facing the challenges of managing and processing massive data sets from multiple sources from large‐scale distributed data centers (DCs). To solve this research problem, this paper presents an infrastructure of multiple data centers (MDC) for managing and processing massive remote sensing images. The proposed system is built on both groups of distributed DCs/clusters, which are equipped with DC or cluster resource manager. Access security and information service are introduced to support this architecture of MDC. We collaboratively organized the algorithm, and data belonged to the MDC in the manner of workflow. In practice, we succeeded in working out the concrete problems regarding procedures in processing applications collaboratively and transfer the massive remote sensing dataset fast and with stable cross‐MDC. On the basis of the previously mentioned research work, we will investigate the platform integration of MDC. Copyright © 2012 John Wiley & Sons, Ltd.
Observing the effect of interprocess communication in auto controlled ant colony optimization‐based scheduling on computational grid
Authors: Tiwari Pawan Kumar , Vidyarthi Deo Prakash 
Published: January 2013

SUMMARYComputational grids allow the sharing of geographically distributed computational resources in an efficient, reliable, and secure manner. Grid is still in its infancy, and there are many problems associated with the computational grid, namely job scheduling, resource management, information service, information security, routing, fault tolerance, and many more. Scheduling of jobs on grid nodes is an NP‐class problem warranting for heuristic and meta‐heuristic solution approach. In the proposed work, a meta‐heuristic technique, auto controlled ant colony optimization, has been applied to solve this problem. The work observes the effect of interprocess communication in process to optimize turnaround time of the job. The proposed model has been simulated in Matlab. For the different scenarios in computational grid, results have been analyzed. Result of the proposed model is compared with another meta‐heuristic technique genetic algorithm that has been applied for the same purpose. It is found that auto controlled ant colony optimization not only gives better solution in comparison to genetic algorithm, but also converges faster because initial solution itself is good because of constructive and decision‐based policy adapted by the former. Concurrency and Computation: Practice and Experience, 2012.© 2012 Wiley Periodicals, Inc.
An Efficient and Reliable Catalyst System Using Hemilabile Aphos for B‐Alkyl Suzuki–Miyaura Cross‐Coupling Reaction with Alkenyl Halides
Authors: Ye Ning , Dai Wei‐Min 
Published: January 2013

AbstractThe 9‐methoxy‐9‐borabicyclo[3.3.1]nonane‐based B‐alkyl Suzuki–Miyaura cross‐coupling reaction (the 9‐MeO‐9‐BBN variant) has been efficiently performed by using the catalyst consisting of Pd(OAc)2 and a hemilabile P,O‐ligand, Aphos‐Y, under mild reaction conditions (K3PO4·3H2O, THF/H2O, room. temp.). For applications in the total synthesis of structurally complex natural products, the Johnson protocol commonly uses two ligands (dppf and Ph3As) and two organic solvents (THF and DMF). In contrast, the new version reported here employs one ligand (Aphos‐Y) and one organic solvent (THF). Moreover, the broad substrate scope and the excellent functional group tolerance of the Pd(OAc)2–Aphos‐Y catalyst have been demonstrated, providing a reliable and simple synthetic tool for fragment coupling in total synthesis through formation of a C(sp3)–C(sp2) bond.
8. Samoan Cultural Heritage Management and Further Perspectives
Authors: Martinsson‐Wallin Helene , Nord Moa 
Published: January 2013

ABSTRACT Cultural Heritage in Samoa“E mana'o i le vao, ae, fefe i le aitu” [We Want the Forest, Yet Fear the Spirits] is a Samoan proverb used by Malama Meleisea (1980:21) to describe the contradiction between the development and culture in Samoa. As chiefdom and family based society the oral traditions are very important and intimately tied to titles/genealogies and land. Archaeology dealing with the past material remains is a young science, which has mainly developed in the Pacific area, since the 1950's and onwards by non‐Polynesians (Emory et al. 1959; Heyerdahl and Ferdon 1961; Gifford 1951; Gifford and Shutler 1956; Kirch 2000). Prior to the archaeological research, traditional history comprising of genealogies, legends and mythology provided the evidences/explanations for origin, migration and structure of the past and contemporary societies. To be an orator chief (tulafale) who handles the “high” language well, and are careful custodians of the honorifics (fa'alupega) gives high status in the society.
Clothing and modern human behaviour: prehistoric Tasmania as a case study
Authors: GILLIGAN IAN 
Published: January 2013

AbstractA general model is outlined showing how the prehistoric development of clothing for thermal reasons may be relevant to the emergence of modern human behaviour. A distinction is drawn between simple and complex clothing, with the latter leading to repercussions that can ultimately became decoupled from thermal contingencies. Archaeological correlates of complex clothing can be linked to attributes of modern human behaviour, some but not all of which made a transient appearance in late Pleistocene Tasmania. Cave sites in the southwest of the island have yielded bone tools and distinctive stone scraper tools, along with evidence for the targeting of prey species and parietal artworks in some caves. Thermal conditions in late Pleistocene Tasmania approached the known limits of human cold tolerance, necessitating the use of clothing. The archaeological record is reviewed in relation to likely technological and other correlates of the manufacture of clothing. It is argued that thermal parameters were a significant aspect of the human response to climate change in Tasmania. These developments invite comparison with those witnessed outside the region during the Upper and late Middle Pleistocene, particularly in northern middle latitudes and also in Africa, where they are interpreted as indicating the emergence of modern human behaviour.
Characterising volcanic glass sources in the Banks Islands, Vanuatu
Authors: REEPMEYER CHRISTIAN 
Published: January 2013

AbstractIn 2006 volcanic glass deposits on Vanua Lava and Gaua Islands were re‐visited and systematically sampled. Twenty‐nine source samples were analysed using EDXA‐SEM and LA‐ICP‐MS with a focus on detecting possible intrasource variation. The results show both Banks Islands deposits are readily distinguishable from each other and from other sources in the region and their chemical compositions are highly homogenous. Surface survey of other prospective areas established that these two are the only volcanic glass sources in the Banks Islands.
Koey Ngurtai: the emergence of a ritual domain in Western Torres Strait
Authors: DAVID BRUNO , McNIVEN IAN J. , CROUCH JOE , BADULGAL MURA , SKELLY ROBERT , BARKER BRYCE , COURTNEY KRIS , HEWITT GEOFFREY ,   CORPORATION COMMITTEE
Published: January 2013

AbstractKoey Ngurtai is a small, uninhabited island located midway between the residential islands of Badu and Mabuyag in western Torres Strait. In 2003 and 2004, 100% surveys of the islet revealed 166 cultural sites. Fifty archaeological excavations were undertaken, revealing a rich history of islet use culminating with the emergence of Koey Ngurtai as a ritual centre after 550–700 cal BP, and a proliferation of ritual structures focused on dugong hunting magic after 350–550 cal BP. Shortly after the arrival of colonial powers in Torres Strait in the 1870s, including pearl shelling and missionary activity, Koey Ngurtai's ritual status was again transformed. This paper reports on these archaeological investigations and historicises Koey Ngurtai as a ritual land‐and‐seascape.
Savanna anthropogenesis in the Mariana Islands, Micronesia: re‐interpreting the palaeoenvironmental data
Authors: HUNTER‐ANDERSON ROSALIND L. 
Published: January 2013

AbstractThis paper argues that human actions had nothing to do with creating tropical Pacific island savannas, which likely arose during the Pleistocene, and that geographic factors such as soils, climate, and fire are responsible for their distribution and persistence in the Holocene. Palaeontological observations from the southern Mariana Islands, including charcoal particles, pollen, and spores in palaeosediments from Guam and Saipan, cited by archaeologists as evidence for human‐caused savannas, are re‐interpreted as a natural outcome of geo‐climatic conditions. Archaeological and ethnographic findings, past climate proxies, and field studies in soil science are also brought to bear on the issue. The data and arguments presented in favor of natural causation of the Marianas savannas motivate a re‐examination of proposals that purport to explain the presence of savannas elsewhere in the tropical Pacific. Implications for future research are drawn.
Another burning question: hunter‐gatherer exploitation of Macrozamia spp.
Authors: ASMUSSEN BRIT 
Published: January 2013

AbstractMacrozamia seeds have long been considered an important economic resource to Australian hunter‐gatherers. As a result of limited ecological data during the 1970's‐1980's, seed production in Macrozamia spp. has been conceptualised as low yield and irregular, but easily stimulated through pyrogenic manipulation to produce high yield, regular resource gluts. This paper reviews and synthesises ecological data on Macrozamia ecology and seed production collated over the last few decades to argue that current archaeological conceptions of Macrozamia seed production and reproductive responses to fire are flawed, and to further consider how these resources were used in the past.