Bibliografie tematiche / Wood based material

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Letteratura scientifica selezionata sul tema "Wood based material"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 10 febbraio 2022

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Articoli di riviste sul tema "Wood based material"

1

Susanto, Dalhar, e Widyarko Widyarko. "Sustainable Material : Used Wood As Building Material". INSIST 2, n. 1 (1 aprile 2017): 14. http://dx.doi.org/10.23960/ins.v2i1.26.

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Abstract–Wood consumption as building material and component in Indonesia is still considerably high. This affects forest destruction, in a way that most of the wood production still roots from wood forests. Hence, the demand of these woods better be supplied from other source, one of them is through using used woods. Used wood utilization in building construction is an application of reuse and recycle strategy in sustainable material concept. Due to the assumption among the people that used woods have low performance its utilization is nowadays limited. This paper addresses the result of research and laboratory test on a range of used wood samples collected from Jakarta great area (Jabodetabek), consist of 5 technical parameters: water content, density, compressive strength, flexure strength, and tension strength. The research proves that based on certain parameters, used woods perfom technical capacity as good as – or even better than – newly produced woods.Keyword – sustainable, material, used wood
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2

Fridley, Kenneth J. "Wood and Wood-Based Materials: Current Status and Future of a Structural Material". Journal of Materials in Civil Engineering 14, n. 2 (aprile 2002): 91–96. http://dx.doi.org/10.1061/(asce)0899-1561(2002)14:2(91).

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3

Feng, Hai Lin, Yi Ming Fang, Jian Li e Guang Hui Li. "Using Stress Wave Based Technology for Wood Material Nondestructive Testing". Advanced Materials Research 143-144 (ottobre 2010): 265–70. http://dx.doi.org/10.4028/www.scientific.net/amr.143-144.265.

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Abstract (sommario):
Stress wave based technology has its special advantages in the field of wood nondestructive testing and quality evaluation. To analysis the propagating properties of stress wave in the wood material, a transmitting model in anisotropic material was introduced in rectangular and cylindrical polar coordinate system. The relationship between stress wave propagation and elastic constants was shown. The propagating of stress wave in wood material and the possible solutions with different parameters were studied. The transmitting character of stress wave in symmetry planes was analyzed, and the elastic constants of woods were used to compute the stress wave propagation in wood material.
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4

KANAYAMA, Kozo. "Flow Deformation of Wood-Based Material". Journal of the Society of Materials Science, Japan 65, n. 12 (2016): 892. http://dx.doi.org/10.2472/jsms.65.892.

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5

KANAYAMA, Kozo. "Flow Deformation for Wood-based Material". Journal of The Adhesion Society of Japan 52, n. 9 (1 settembre 2016): 276–80. http://dx.doi.org/10.11618/adhesion.52.276.

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Kaufhold, Julia, Johannes Kohl, Venkatesh Naidu Nerella, Christof Schroefl, Christoph Wenderdel, Paul Blankenstein e Viktor Mechtcherine. "Wood-based support material for extrusion-based digital construction". Rapid Prototyping Journal 25, n. 4 (13 maggio 2019): 690–98. http://dx.doi.org/10.1108/rpj-04-2018-0109.

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Abstract (sommario):
Purpose Extrusion-based digital construction (DC) approaches make it feasible to overcome constraints of conventional construction, namely, high formwork costs, long total construction times, low productivity and geometrical inflexibility. However, to date, no satisfactory solutions for extruding strongly inclined and horizontal elements are available. A wood-starch-composite has been systematically developed as a sustainable support material (SM) for extrusion-based DC. Design/methodology/approach Material and process-specific requirements were identified for this purpose, and a feasible process chain was developed. A parametric study was conducted to determine the influence of SM composition on its extrusion feasibility and compressive strength. Various compositions with two starch types and two wood particle shapes were tested. New, specific testing methods were developed. Selected compositions were tested using a 3D-printing device to verify extrudability and form stability. Findings Relationships between material compositions of SM and its rheological and mechanical properties were identified. All mixtures showed sufficient compressive strength in respect of the loading conditions analysed. However, their flow properties varied significantly. A mixture of native maize starch and wood floor was identified as the best variant (compressive strength 2.3 MPa). Research limitations/implications Comprehensive investigations of possible process chains, as well as full-scale demonstration and optimisation of the process parameters, were not in the scope of this paper. Such investigations are intended in further studies. Practical implications The general applicability of wood-based SM for DC with cement-based construction materials was proved. Originality/value The findings offer a novel and promising solution for 3D-printing of non-vertical concrete elements. Experimental setup and material compositions are detailed to ensure reproducibility.
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Li, Yong Feng, Yi Xing Liu, Yun Lin Fu, Qing Lin Wu e Xiang Ming Wang. "Durability Improvement of Bio-Based Material by Polymer". Materials Science Forum 675-677 (febbraio 2011): 495–98. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.495.

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Bio-based materials such as wood, bamboo, bio-straw material are vulnerable to degradation by microorganisms and susceptible to change in dimension under humidity, which greatly reduced their service life. In this study, a novel thought was inspired from the unique porous structure of bio-based material that durability of wood may be capable of being improved by generating polymer in situ the special structure. Maleic anhydride (Man) and Styrene (St) were used to penetrate into wood for further copolymerization. SEM observation shows that polymer filled in wood porous structure and tightly contacted wood matrix (i.e. biopolymers), indicating strong interaction between them. FTIR analysis indicates that polymer chemically grafted onto wood matrix by reaction of anhydride group and hydroxyl group. As the amount of hydroxyl groups greatly reduced for their reacting with polymer, the dimensional stability of wood immersing in water was improved; and as the reaction of wood with polymer, the biopolymers were wrapped by resultant polymer, preventing the sample from attack of microorganisms, thus decay resistance of treated wood against microorganisms was greatly improved. Both of them contributed to the improvement of wood durability.
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Safin, Ruslan R., Lilia Vakifovna Akhunova, Aigul Ravilevna Shaikhutdinova e Radis Reshidovich Ziatdinov. "The Study of Wood-Based Composites Based on Biodegradable Polymer". Key Engineering Materials 706 (agosto 2016): 78–81. http://dx.doi.org/10.4028/www.scientific.net/kem.706.78.

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The article presents the wood composite materials based on biodegradable component of polyvinyl acetate with the filler in a form of wood flour of pine trees of two types: unmodified and thermally modified pine. The sorption properties of composite of both species, namely the ability of a material to absorb moisture depending on the quantity and nature of wood filler were studied. The strength characteristics of composite materials with non-modified and modified wood fillers were investigated and revealed. The research of the loss of relative weight of both types of composite materials while standing in soil was conducted.The expediency of preliminary heat treatment of wood filler on politely if necessary some increase in biostability of the composite is found.
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9

Saidin, Wahab, Abdullah Wagiman e Mustaffa Ibrahim. "Development of Wood-Based Composites Material for 3D Printing Process". Applied Mechanics and Materials 315 (aprile 2013): 987–91. http://dx.doi.org/10.4028/www.scientific.net/amm.315.987.

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Abstract (sommario):
This paper presents the development of wood-based composites material for 3D Printing process. The aim is to characterize the waste material from wood powder (WD) as an alternative material and low cost production for rapid prototyping product. The powder blends containing wood powder (90-120µm) with commercial ZP102 material from Z Corporation was used as the composite material. The materials were mechanically blended to produce composition of WD/ZP102(vol.%) 25:70, 50:50 and 75:25 respectively. The material was successfully processed on 3D printers machine, to produce three-dimensional components and followed by post-treatment with ZMax solution to enhance the mechanical properties. The mechanical properties, dimensional accuracy and surface quality of the components were evaluated and the results were compared with the standard ZP102 material. The result shows that the mechanical properties improved with the increased of wood powder content up to 50 (vol.%). However, dimensional accuracy and surface quality were decreased as the wood content increased. Further work on powder preparation is continued for surface quality improvement.
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Štefko, Jozef, e Jozef Bednár. "Wood Based Building Envelope Regarding Air Tightness". Key Engineering Materials 688 (aprile 2016): 160–66. http://dx.doi.org/10.4028/www.scientific.net/kem.688.160.

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The paper deals with laboratory air tightness testing of wood based construction materials with the focus on the proportion of air infiltration through the building envelope in the air exchange of the building. Results of the specific materials testing – cross laminated timber (CLT), OSB and other structural materials are analysed in the paper. Moreover, the effect of production technology, material, its thickness and surface treatment are studied. Results of laboratory testing provide valuable data for detailed computer modelling of air exchange through the infiltration, especially in vapour diffusion-open elements of building envelope.
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Più fonti

Tesi sul tema "Wood based material"

1

Christoforo, John Carmen. "Wood-based material use in the United States pallet and container industry". Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-11102009-020207/.

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2

Müller, Christoph, Sven Eichhorn, Detlef Krug e Andreas Weber. "Holzwerkstoffe in technischen Anwendungen – Anforderungen aus Sicht des Maschinenbaus". Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-95423.

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Abstract (sommario):
Im Vortrag werden die Holzwerkstoffe charakterisiert und anderen Konstruktionswerkstoffen und technischen Verbundmaterialien gegenüber gestellt. Anhand eines Ausführungsbeispiels wird deren technologische und wirtschaftliche Leistungsfähigkeit analysiert. Darauf aufbauend werden notwendige Maßnahmen zur Verbesserung der Werkstoffe sowie zu deren Etablierung in der Technik dargestellt. Aus dem Vergleich der jeweiligen Eigenschaftsprofile werden zukünftige Nutzungsmöglichkeiten der Holzwerkstoffe in der Technik abgeleitet. Ein Ausblick zeigt den möglichen Entwicklungsspielraum für Holzwerkstoffe in technischen Anwendungen
The properties of wood materials are compared to several engineering materials, like metal alloys, polymers and fiber reinforced plastics. The technologic and economic efficiency of plywood is illustrated by the implementation of a wooden beam. Accordingly necessary measures for the improvement of wood materials and their recognition in mechanical engineering are shown. A perspective of further fields of applications for wood materials in a technical context is given
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Eichhorn, Sven, Ronny Eckardt e Christoph Müller. "Einblick in die Geschichte der Holzwerkstoffe im Maschinen- und Anlagenbau und aktuelle Möglichkeiten der angemessenen technischen Nutzung". Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61031.

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Abstract (sommario):
Der Einsatz von Holz- und speziell Holzfurnierlagenverbundwerkstoffen (WVC) konzentrierte sich in den vergangen Jahrzehnten nahezu ausschließlich auf den Möbelbau und den Bausektor. Eine Verwendung von Holzwerkstoffen im Sinne einer angemessenen technischen Nutzung der vorhandenen Eigenschaften im Maschinen- und Anlagenbau wird hingegen aktuell kaum praktiziert. Der Vortrag zeigt anhand der Darstellung und Analyse des Standes der Technik Einsatzmöglichkeiten des Werkstoffes im Maschinen- und Anlagenbau auf und charakterisiert dabei die Bereiche, in denen noch verstärkt gearbeitet werden muss, um diese Einsatzmöglichkeiten angemessen nutzen zu können. Weiterhin werden grundlegend relevante Werkstoffeigenschaften für das angestrebte Einsatzgebiet charakterisiert und erste Einblicke in Bauformen aus WVC gegeben, mit denen ein praktischer Einsatz im Allgemeinen Maschinenbau und damit in der Fördertechnik technisch sinnvoll ist
For the last decades the usage of plywood materials (Wood Veneer Composites) was mainly focused on furniture and civil engineering. At the moment there is no adequate technical use of wood based materials in mechanical engineering in respect to its particular properties. Following the state of the art several fields of application in mechanical engineering are presented as well as subjects were identified which need further investigation. Relevant material properties for the aspired technical application are characterized. Furthermore an insight in realized designs of WVC structures is given
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4

Tran, Thi Ngoc Huyen. "Study of compression behavior of wood-based fiberboard : caractérisation à partir de techniques d'imagerie non destructives". Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14666/document.

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La thèse a pour but de caractériser les propriétés mécaniques de matériaux à base de fibres de bois en relation avec les propriétés intrinsèques des fibres et leur arrangement spatial complexe. Ce type de matériau, dont les caractéristiques dépendent de sa configuration, est hétérogène à différentes échelles : à l’échelle microscopique de la fibre, à l’échelle mésoscopique du réseau des fibres et à l’échelle macroscopique du matériau. Pour observer ces hétérogénéités, différents moyens expérimentaux de caractérisation sont utilisés, notamment la microtomographie aux rayons X et la corrélation d’images volumiques. Ces deux techniques permettent à la fois de visualiser et numériser la position spatiale des différentes fibres du matériau à l’échelle microscopique dans le volume, et d’obtenir le champ tridimensionnel de déformation à cœur. Comme résultats, le matériau étudié montre un comportement non-linéaire avec une déformation résiduelle et un effet d’hystérésis en charge/décharge, qui suit le modèle de Van-Wyk. A l’échelle microscopique, le champ de déformation 3D apparait fortement hétérogène et est intimement lié aux porosités locales
This thesis aims at characterizing the mechanical properties of wood-based fibrous material in relation with the intrinsic properties of the fiber as well as the complex architecture of random fibrous assembly. This material, whose characteristics strongly depend on its configuration, is heterogeneous at different scales: microscopic scale of individual fibers, mesoscopic scale of fiber assembly and macroscopic scale of sample. In order to observe these heterogeneities, different experimental characterization methods are employed, especially X-ray microtomography and Digital Volume Correlation. These both techniques allow us to visualize and digitize the spatial position of different phases of material at microscopic scale as well as the full 3D strain field inside the material. The obtained results are following: the material shows a non-linear mechanical behavior with hysteresis and residual deformation during cyclic compression tests, which respects Van Wyk's model. At microscopic scale, the 3D strain field is strongly heterogeneous and deeply related to local porosities
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5

Phan, Ngoc Anh. "Simulation of time-dependent crack propagation in a quasi-brittle material under relative humidity variations based on cohesive zone approach : application to wood". Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0008/document.

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Cette thèse est consacrée à la simulation du comportement à la rupture de bois sous des chargements à long terme et sous des conditions d'Humidité Relatives (HR) de l'air variables. Il est connu que le bois est un matériau fortement hygroscopique, ses propriétés mécaniques et de rupture sont en effet très dépendantes de sa teneur en eau. En outre, la stabilité d'une fissure existante dans un élément structural peut être fortement influencée parles variations, en particulier brusques, d'humidité relative qui peut conduire à la rupture inattendue de l'élément.L'approche thermodynamique proposée intègre l'effet de mécanosorption dans l'expression analytique de la déformation, en découplant les déformations mécaniques et celles dues au comportement mécanosorptif du matériau. En outre, la rupture quasi-fragile du matériau boisest traduite par un modèle de zone cohésive dont les paramètres de cohésion sont fonctions de la teneur en eau afin de simuler l’effet de l'humidité sur les propriétés de rupture. Sur cette base, une formulation incrémentale permet l'intégration de l'effet des variations soudaines d’humidité relative (autrement dit, le choc hydrique) sur la zone d’élaboration(zone cohésive) en introduisant un champ de contraintes supplémentaires le long de cette zone. Fonction de la variation de HR, ce champ de contraintes supplémentaires dépend de l'état de contrainte et de l'ouverture de la fissure le long de la zone cohésive, mais également de l'humidité en pointe de fissure (matériau non endommagé). Dans l'analyse par éléments finis, un opérateur tangent algorithmique est utilisé pour résoudre le problème non linéaire en combinant le modèle de mécanosorption et le modèle de zone cohésive et en intégrant l'effet du choc hydrique.La simulation du comportement d'une éprouvette entaillée soumise à un chargement constant et à des variations cycliques de HR montre un fort couplage entre le comportement mécanosorptif et l'effet du choc hydrique HR sur la zone d’élaboration. Ce couplage entraîne une augmentation de la propagation des fissures et conduit à une fissuration plus précoce par rapport à celle obtenue à partir du modèle de mécanosorption seul ou à partir du modèle de zone cohésive en intégrant l'effet des variations soudaines de HR. En outre, le couplage entre le modèle mécanosorptif et le modèle de zone cohésive en intégrant l'effet du chochydrique montre l'intérêt d'une telle approche numérique pour décrire le comportement complexe des éléments de charpente en bois soumis à des conditions climatiques variables,comportement qui ne peut être prédit par une simple superposition des deux modélisations
This thesis is dedicated to the simulation of the fracture behavior of wood under long-termloading and variable relative humidity conditions. Indeed, wood is well-known to be a highlyhygroscopic material in so far as its mechanical and fracture properties are very dependenton moisture. Moreover, the stability of an existent crack in a structural element can bestrongly affected by the sudden variations of relative humidity (RH) and can lead tounexpected failure of the element.The thermodynamic approach proposed in this thesis includes the mechano-sorptive effect inthe analytical expression of the deformation, by operating a decoupling of the strain in amechanical part and a mechano-sorptive part in material. Moreover, the quasi-brittle fractureof wood is here simulated from a cohesive zone model whose cohesive parameters arefunctions of the moisture in order to mimic the moisture-dependent character of the fractureproperties. On this basis, an increment formulation allows the integration of the effect ofsudden RH variations on the fracture process zone (cohesive zone) by introducing anadditional stress field along this zone. As a function of the RH variation, this additional stressfield depends on not only the stress state and the crack opening along the cohesive zone butalso the material moisture ahead of the zone (undamaged material). In the finite elementanalysis, an algorithmic tangent operator is used to solve the non-linear problem combiningmechano-sorptive model and cohesive zone model including the effect of sudden RHvariations.The simulation of a notched structural element submitted to a constant load and cyclic RHvariations exhibits a strong coupling between the mechano-sorptive behavior and the effectof the RH variations on the fracture process zone (FPZ). This coupling results in an increaseof the crack propagation kinetic and leads to a precocious failure compared to those obtainedfrom the mechano-sorptive model or from the effect of sudden RH variations on the FPZ.Moreover, the coupling between the mechano-sorptive model and the effect of sudden RHvariations on the FPZ which cannot be predicted by a simple superposition of both effects,showing the interest of such a numerical approach in order to describe the complex behaviorof wood structural elements submitted to variable climatic conditions
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Eckardt, Ronny, e Sven Eichhorn. "Neue Bauweisen in der Intralogistik durch Holzverbundwerkstoffe - Verbindungselemente für dynamische Belastungen". Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61936.

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Abstract (sommario):
In der technischen Logistik bieten Bauweisen aus Holzverbundwerkstoffen, speziell aus schichtförmigen aufgebauten Halbzeugen (WVC – Wood-Veneer- Composites), eine Alternative zu Konstruktionen aus Metallwerkstoffen, vor allem aufgrund ihrer guten spezifischen mechanischen Eigenschaften sowie ihrer günstigen Korrosionseigenschaften. Benötigte Verbindungsmittel entstammen dabei dem Bau- oder Möbelsektor und sind vorrangig statischen Belastungen angepasst. Der Vortrag gibt einen kurzen Einblick in Bauweisen mit WVC und stellt dabei Forschungsergebnisse zu statischen und dynamischen Untersuchungen an prinzipiell geeigneten Verbindungselementen in den Vordergrund. Dabei wird vor allem auf holztypische Problemstellungen im Zusammenhang mit dynamischen Belastungen eingegangen. An Funktionsmustern werden mögliche Anwendungen in der Fördertechnik, speziell für den Stückguttransport, dargestellt.
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Eckardt, Ronny, e Sven Eichhorn. "Konstruktion und Erprobung modularer Maschinengestelle aus Holzfurnierlagenverbundwerkstoff (WVC)". Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61046.

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Abstract (sommario):
Durch die Entwicklung der vorgestellten modularen Bauweise ist es möglich, Maschinengestelle aus Holzfurnierlagenverbundwerkstoff (WVC) einfach herzustellen und technisch sinnvoll einzusetzen. Die modulare Bauweise kann sowohl für statische als auch dynamische Beanspruchungen im Allge-meinen Maschinenbau angewendet werden. In einem Baukastensystem werden Maschinenteile aus WVC durch geeignete Verbindungsmittel lösbar zusammengesetzt. Damit ist es möglich, eine hohe Flexibilität in der späteren Nutzung mit einer hohen Variantenvielfalt des Aufbaus durch entsprechend verschiedene Bauteile zu kombinieren. Im Vortrag werden die verschiedenen Belastungen des Holzverbundes im Maschinenaufbau charakte-risiert und auf Probleme bei der Konstruktion eingegangen. Abschließend werden Ergebnisse zu Dau-eruntersuchungen der Verbindungstechnik und des gesamten Maschinenaufbaus vorgestellt und diskutiert
The development of the presented modular construction allows to manufacture wood veneer compos-ite (WVC) machine racks easily in a technical reasonable way. The modular construction can be used for both static and dynamic loading conditions in mechanical engineering. In the modular construction system the WVC machine components are connected detachable with adequate fasteners. This leads to high flexibility during the construction and assembly process of machine components. In the current presentation the different loading conditions of WVC profiles are characterized and the problems during construction described. Finally the results of the long term testing of the connection technique are presented and the complete machine system is discussed
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Eichhorn, Sven, Ronny Eckardt e Christoph Müller. "Schwingungs- und geräuschdämpfende Leichtbauelemente im Maschinenbau auf Basis von Konstruktionswerkstoffen aus Holz". Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000990.

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Abstract (sommario):
Im Forschungsprojekt wurde eine Bauweise für ein modular aufgebautes und flexibel einsetzbares Gestellsystem entwickelt, welches durch integrativen Leichtbau den vorteilhaften Einsatz von Holzfurnierlagenverbund-werkstoffen (WVC) für Verarbeitungs- und Fördermaschinen ermöglicht. Die ingenieurtechnisch relevanten Eigen-schaften des Holzbasiswerkstoffs (u.a. strukturelle Dämpfungseigenschaft) wurden ermittelt und darauf aufbauend ein Profil als Strukturelement des Gestellsystems entwickelt. Hier lag besonderes Augenmerk auf der Gestaltung des Profilquerschnitts. Es wurden verschiedene Querschnittsgeometrien vergleichend untersucht, wobei sich ein ge-schlossenes Kastenprofil als günstig erwies. Ausgehend vom entwickelten Profil wurde die für ein modulares Sys-tem notwendige Verbindungstechnik konzipiert. Folgend wurde schrittweise die modulare Bauweise in Strukturein-heiten umgesetzt sowie parallel Untersuchungen zu Steifigkeit und Festigkeit der Profile fortgeführt. Während der Erprobung von Struktureinheiten unter praxisnahen Bedingungen wurden gewisse konstruktive Verbesserungspo-tentiale deutlich. Diese Änderungen sowie die gewonnenen Erkenntnisse aus der Material- und Strukturprüfung kamen im Prototyp zur Umsetzung. Schallpegelprofile verschiedener fördertechnischer Anlagen und des entwickel-ten Prototypen wurden abschließend aufgenommen und verglichen
Aim of the present study was to develop a modular designed and widely employable rack system. Positive properties of wood based materials (WVC) in lightweight structures were identified and integrated for the application in fabri-cation and conveyer technologies. For this purpose relevant properties of wood materials had been investigated (e.g. damping properties). The results of these analyses were the basis for the development of a beam profile, the basic structural design element for the future rack system. The most effort was put into finding the optimal beam cross section. Several different cross sections had been compared, a square sectional beam profile showed the best per-formance. Based on the square sectional beam profile proper connection methods for the modular rack were devel-oped. Structural units were subsequently realized step by step, while the investigation of stiffness and strength of the profiles was continued. The testing of the structural units under simulated field conditions revealed some minor constructional improvement capabilities. The constructional improvements and the knowledge from the material and profile testing were put into practice in the prototype. Finally sound measurements were carried out to compare several conveyors made of different materials (including the prototype) in respect to the emitted sound level
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Fitzgerald, Lydia A. "EFFECT OF BEDDING TYPE AND SOIL INCORPORATION ON NITROGEN MINERALIZATION RATE OF BROILER LITTER AMENDED SOILS". UKnowledge, 2019. https://uknowledge.uky.edu/pss_etds/123.

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Abstract (sommario):
Broiler litter (BL) is a high value manure available to Kentucky crop producers to utilize as a fertilizer. The rate of BL application, timing of application, and method of application are all important factors to take into account when utilizing BL. A laboratory incubation was conducted to observe nitrogen (N) mineralization rates of BL amended soils over time under different conditions. Different application methods, application rates, watering frequencies, and bedding materials were used to determine their influence on N mineralization. Broiler litter applied on the soil surface, at lower rates, at lower watering frequency resulted in lower mineralization rates than BL that was incorporated, at higher rates and higher watering frequency. The rice hull bedding BL treatments had a significantly higher initial amount of NH4+-N than the wood-based bedding materials. The increased NH4+-N content produced a lower pH due to higher rates of nitrification. The difference in NH4+-N resulted in the rice hull BL treatments containing more inorganic N throughout the incubation. The wood-based BL contained significantly more carbon (C), zinc (Zn), and potassium (K). The results collected will help improve current nutrient recommendations and provide information that will help utilize BL more efficiently and economically.
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10

Eichhorn, Sven, Ronny Eckardt e Christoph Müller. "Integrative Bauweisen mit Holzfurnierlagenverbundwerkstoff (WVC) für den Maschinen- und Anlagenbau". Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-79120.

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Aufbauend auf historischen Anwendungen von Holzwerkstoffen in der Technik werden Vor- und Nachteile aus der Sicht des Maschinenbaus dargestellt sowie eine aktuelle Eignung dahingehend diskutiert. Besondere Aufmerksamkeit erfährt der integrative Leichtbau mit Holzfurnierlagenverbundwerkstoffen (Wood Veneer Composite, WVC). Durch deren modifizierbares Eigenschaftsprofil, in Verbindung mit einer an den Anwendungsfall angepassten Bauweise, ist eine zusätzliche Funktionsintegration möglich. Das Potenzial der Holzwerkstoffe wird an verschiedenen Konstruktionsbeispielen erläutert. Ergänzend werden Biege-Ersatz Emodul und Bauteilverformung eines Strukturelementes sowie Ergebnisse aus Ermüdungsversuchen der Verbindungstechnik dargestellt. Abschließend werden Probleme beider Umsetzung verschiedener Prototypen beschrieben und deren Lösung aufgezeigt
Based on several historical applications of Wood Veneer Composites (WVC) the advantages and disadvantages of wood materials in today`s mechanical and plant engineering are discussed. Integrated WVC lightweight structures are especially taken into account. The highly modifiable mechanical properties of WVC’s allow application-adapted integration of further technical functions. The capabilities of integrated lightweight structures based on wood materials are demonstrated on several technical applications. Furthermore results of flexural tests, precisely the retrieved substitutet bending modulus and the maximal deflection as well as results of fatigue testing of the connecting components are given. Finally problems occurring during realization of WVC lightweight prototypes and their potential solutions are shown
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Libri sul tema "Wood based material"

1

Dielectric properties of wood and wood-based materials. Berlin: Springer-Verlag, 1993.

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Torgovnikov, Grigoriy I. Dielectric Properties of Wood and Wood-Based Materials. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-77453-9.

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3

Bucur, Voichita. Delamination in Wood, Wood Products and Wood-Based Composites. Dordrecht: Springer Science+Business Media B.V., 2011.

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4

Bullard, Steven H. The Mississippi furniture industry and its use of wood-based materials. Mississippi State: Mississippi Forest Products Utilization Laboratory, 1988.

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5

Pacific, Rim Bio-Based Symposium (1992 Rotorua N. Z. ). Pacific Rim Bio-Based Composites Symposium, Rotorua, New Zealand, 9-13 November 1992. Rotoura, N.Z: New Zealand Forest Research Institute, 1992.

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6

Overholt, James L. Math stories for problem solving success: Ready-to-use activities based on real-life situations, grades 6-12. 2a ed. San Francisco, CA: Jossey-Bass, 2008.

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7

Biba, Anna. Methods of preparing children to learn Russian at school. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/991911.

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The textbook is aimed at developing professional competencies in preparing preschool children to learn Russian at school.it reveals the current content of preparing preschoolers to learn reading and writing in primary school, contains a method for teaching them sound word analysis, reading syllables and words in accordance with a scientifically based sound analytical and synthetic method, a technique for teaching children to print letters and syllables, and describes opportunities for cognitive development of preschool children in the process of speech work. The methodological material is accompanied by examples from the speech of preschool children and their training practices. A test is offered for professional self-control over the assimilation of the corresponding methodology in General. The appendices contain methodological illustrative and reference material. Meets the requirements of Federal state educational standards of higher education of the latest generation. For undergraduate students in the field of "Pedagogical education", it can also be used by undergraduates in the study of a course on the cognitive development of preschool children and in the process of professional development and retraining of employees of preschool educational institutions and primary school teachers.
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Sustainable Public Buildings Designed and Constructed in Wood. RTU Press, 2021. http://dx.doi.org/10.7250/9789934225758.

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The handbook presents significant theoretical and practical solutions in design, construction and management of sustainable wooden public buildings, based on experiences in five countries – Lithuania, Denmark, UK, Finland and Latvia, as well as in the international context. Understanding of sustainable development and the importance of wooden construction discussed, properties of wood as a construction material analysed, design solutions, including moisture, fire safety and acoustical considerations provided, wooden construction project and process management addressed, use and maintenance, including planning and inspections described, most common reasons of failures identified. The handbook is primary intended for undergraduate students who study design and construction of sustainable buildings. The presented materials are relevant not only in the academic context, but may be significant to all stakeholders in construction and real estate markets who are committed to sustainable construction in wood.
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P, Schniewind Arno, a cura di. Concise encyclopedia of wood & wood-based materials. Oxford, England: Pergamon Press, 1989.

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1936-, Shiraishi Nobuo, Kajita H e Norimoto M, a cura di. Recent research on wood and wood-based materials. London: Elsevier Applied Science, 1993.

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Capitoli di libri sul tema "Wood based material"

1

Bodig, Jozsef. "Group C: Material Resistance Considerations". In Reliability-Based Design of Engineered Wood Structures, 169–75. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-8044-1_12.

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Foschi, R. O. "Material Characteristics and Reliability-Based Design". In Reliability-Based Design of Engineered Wood Structures, 75–89. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-8044-1_5.

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3

Rensink, Stephanie, Michael F. Sailer, Roy J. H. Bulthuis e Mieke A. R. Oostra. "Application of a Bio-Based Coating for Wood as a Construction Material: Fire Retardancy and Impact on Performance Characteristics". In Wood & Fire Safety, 90–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41235-7_13.

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4

Hazarika, Ankita, Prasanta Baishya e Tarun K. Maji. "Bio-based Wood Polymer Nanocomposites: A Sustainable High-Performance Material for Future". In Advanced Structured Materials, 233–57. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2470-9_8.

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Paine, F. A. "Wood and wood-based materials". In The Packaging User’s Handbook, 25–35. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4613-1483-7_2.

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Taghiyari, Hamid R., Jack Norton e Mehdi Tajvidi. "Effects of Nano-materials on Different Properties of Wood-Composite Materials". In Bio-based Wood Adhesives, 310–39. Boca Raton, FL : CRC Press, [2016] | “A science publishers book.”: CRC Press, 2017. http://dx.doi.org/10.1201/9781315369242-14.

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Torgovnikov, Grigoriy I. "Dielectric Properties of Wood-Based Materials". In Dielectric Properties of Wood and Wood-Based Materials, 135–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-77453-9_8.

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8

Özdemir, E., L. Kiesewetter, K. Antorveza, T. Cheng, S. Leder, D. Wood e A. Menges. "Towards Self-shaping Metamaterial Shells:". In Proceedings of the 2021 DigitalFUTURES, 275–85. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_26.

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AbstractDouble curvature enables elegant and material-efficient shell structures, but their construction typically relies on heavy machining, manual labor, and the additional use of material wasted as one-off formwork. Using a material’s intrinsic properties for self-shaping is an energy and resource-efficient solution to this problem. This research presents a fabrication approach for self-shaping double-curved shell structures combining the hygroscopic shape-changing and scalability of wood actuators with the tunability of 3D-printed metamaterial patterning. Using hybrid robotic fabrication, components are additively manufactured flat and self-shape to a pre-programmed configuration through drying. A computational design workflow including a lattice and shell-based finite element model was developed for the design of the metamaterial pattern, actuator layout, and shape prediction. The workflow was tested through physical prototypes at centimeter and meter scales. The results show an architectural scale proof of concept for self-shaping double-curved shell structures as a resource-efficient physical form generation method.
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Kong, Ing. "Wood-Based Phenolic Composites". In Phenolic Polymers Based Composite Materials, 39–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8932-4_3.

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Rantuch, Peter, Jozef Martinka e Igor Wachter. "Initiation Parameters of Wood Based Materials". In Wood & Fire Safety, 28–34. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41235-7_5.

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Atti di convegni sul tema "Wood based material"

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Saasen, Arild, Helge Hodne, Egil Ronæs, Simen André Aarskog, Bente Hetland, Marie Bjørdal Løvereide e Rahmat Mohammadi. "Wood Fibre Based Lost Circulation Materials". In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77662.

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In this paper both a coarse and fine wood fibre type of Lost Circulation Material (LCM) is tested in the laboratory. It is shown how these fibre treatments work. The fibre type is partially oil wetting making them suitable for application in oil based drilling fluids. The fine material helps stopping small drilling induced fractures, while the coarse helps stopping lost circulation into several natural fractures or coal or conglomerate formations. In the article, the selection of wood fibres is described in more detail. Testing of the fine materials were conducted conventionally by pumping drilling fluid volumes with LCM onto slotted disks in fluid loss apparatuses. The coarse fibres are too large to be tested in these apparatuses. Therefore, gravel with grain diameter around two centimetres was filled into transparent cylinders. The pore throats created by these gravel particles were above half a centimetre. For both of these LCMs the experiments show the sensitivity of the LCM concentration in the drilling fluid to stop the lost circulation. Also, it is shown the effect of the LCM on viscous properties of the drilling fluids. Not all LCMs can be pumped through the bit. The article describes the need for circulation subs in the bottom hole assembly (BHA) to hinder the LCM blocking the entire BHA.
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Neykov, Nikolay, Petar Antov e Viktor Savov. "Circular economy opportunities for economic efficiency improvement in wood-based panel industry". In 11th International Scientific Conference „Business and Management 2020“. VGTU Technika, 2020. http://dx.doi.org/10.3846/bm.2020.493.

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The enhanced technological possibilities to utilise wood waste and residues in the production of wood-based panels can help towards the transition to a circular, low-carbon bioeconomy. The cascading use of wood resources, defined as “the efficient utilisation of resources by using residues and recycled materials for material use to extend total biomass availability within a given system” is one of the leading principles for achieving this goal. The wood-based panel industry is characterised by significant amounts of waste and residues that present a great volume potential for cascading. The aim of the present study is to define the basic guidelines for cascading use of wood waste from the production of wood-based panels and analyse the economic impact in terms of economic efficiency in line with the circular and bioeconomy principles. Time series analysis of wood waste and raw material flows in the Republic of Bulgaria, economic assessment of the current utilisation of wood waste in the wood-based panel industry along with comparative analysis of the potential utilization methods have been presented. The existing technical and market barriers to the cascading use of wood have also been discussed.
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Georgescu, Mihai, Maria Sonmez, Laurentia Alexandrescu, Mihaela Nituica, Maria Daniela Stelescu e Dana Gurau. "Designing and obtaining wood waste and chloroprene rubber-based composites". In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.iv.7.

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The aim of this paper is to obtain and study the properties of wood waste reinforced elastomer composites with various fibre contents (10-50 wt%). The composite is based on chloroprene rubber, and added post-consumer recycled wood particles, with dimensions of 500 nm eco-reinforcing material, and active fillers, plasticizers, vulcanizing agents, antioxidants. In order to enhance the compatibility and their level of interaction, the wood waste was finely ground (cryogenic mill) and functionalized with potassium oleate. Wood waste acts as a filling material which leads to the biodegradability of the composite and the decrease in density. Tensile, tear strength, elasticity, hardness, abrasion resistance, melt flow index and morphological study (FT-IR) of those composites were examined in order to determine the viability in various applications domains.
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Hobballah, Mohamad, Pierre Vignon e Huyen Tran. "Multi-objective optimization of an insulating product based on wood fibre material". In ESAFORM 2016: Proceedings of the 19th International ESAFORM Conference on Material Forming. Author(s), 2016. http://dx.doi.org/10.1063/1.4963610.

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Hongcheng, He, e Deng Layun. "Overview of the advance in biodegradable composites based on wood fiber". In 2012 International Conference on Biobase Material Science and Engineering (BMSE). IEEE, 2012. http://dx.doi.org/10.1109/bmse.2012.6466169.

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McKeown, Murat Sean, Samir Trabelsi e Ernest William Tollner. "Effects of temperature and material on dielectric properties of pelleted wood-based biomass". In SoutheastCon 2015. IEEE, 2015. http://dx.doi.org/10.1109/secon.2015.7133050.

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Ruskova, Kamelia, Vessislava Toteva e Liliya Manoilova. "Obtaining of Activated Carbon Adsorbents Based on Wood Waste Material via Chemical Activation". In 2020 III International Conference on High Technology for Sustainable Development (HiTech). IEEE, 2020. http://dx.doi.org/10.1109/hitech51434.2020.9363992.

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Yang, Xinhui, Dawei Qi e Peng Zhang. "Boundary identification for wood defects using Neural Network based on Matlab programming". In 2012 International Conference on Biobase Material Science and Engineering (BMSE). IEEE, 2012. http://dx.doi.org/10.1109/bmse.2012.6466242.

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Jun, Shen, e Li Shuang. "Correlation of two environmental chambers for measuring VOC emission from wood-based panels". In 2012 International Conference on Biobase Material Science and Engineering (BMSE). IEEE, 2012. http://dx.doi.org/10.1109/bmse.2012.6466190.

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Madyira, Daniel M., Takalani Mabirimisa e Tien-Chien Jen. "Mechanical Performance of Paper Pulp and Wood Glue Composite". In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71880.

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Due to depleting natural resources, it is necessary to develop eco-composite materials that are fabricated from sustainable and inexpensive materials such as recycled paper or cellulose-based materials. Such materials are required to meet the mechanical performance at par with traditional materials. The main aim of this study was to investigate the mechanical performance of a composite material fabricated from paper pulp and polyvinyl acetate (wood glue). It is expected that a high strength composite material may be achieved by varying the amount of paper-pulp fiber fraction from 7.5%, 10%, 20%, 30%, 40%, 50% to 60% weight. A tensile test was conducted and it was found that an increase in fiber content on the fabricated composite resulted in an increase in ultimate tensile strength and a decrease in corresponding strain. Furthermore, the material becomes more brittle at higher fiber content and conversely, more ductile at lower fiber content. The ultimate tensile strength was found to be 7.69 MPa at 60% w.t fiber and the minimum tensile strength was 0.12 MPa at 0% w.t fiber. There were no signs of fiber content limit observed in the obtained results. It was concluded that a composite of moderate strength was produced and future work is required in order to fully understand how the composite behaves at different loading conditions. However, an optimum fiber content limit will have to be determined.
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Rapporti di organizzazioni sul tema "Wood based material"

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Ross, Robert J., Jiangming Kan, Xiping Wang, Julie Blankenburg, Janet I. Stockhausen e Roy F. Pellerin. Wood and Wood-Based Materials as Sensors—A Review of the Piezoelectric Effect in Wood. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2012. http://dx.doi.org/10.2737/fpl-gtr-212.

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Lampo, Richard G., e Tom Napier. Reclamation of Wood Materials Coated with Lead-Based Paint. Fort Belvoir, VA: Defense Technical Information Center, maggio 2008. http://dx.doi.org/10.21236/ada607018.

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Napier, Thomas R., Robert H. Falk, George B. Guy e Susan Drodz. Regulatory and policy issues for reuse and remanufacture of wood materials coated with lead-based paint. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2005. http://dx.doi.org/10.2737/fpl-gtr-164.

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Dubrulle, Laura, Mauro Zammarano e Rick D. Davis. Effect of Fire-Retardant Coatings and Accelerated-Weathering on the Flammability of Wood-Based Materials in Wildland-Urban Interface (WUI) Communities. National Institute of Standards and Technology, novembre 2020. http://dx.doi.org/10.6028/nist.tn.2094.

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Piper, Benjamin, Yasmin Sitabkhan, Jessica Mejia e Kellie Betts. Effectiveness of Teachers’ Guides in the Global South: Scripting, Learning Outcomes, and Classroom Utilization. RTI Press, maggio 2018. http://dx.doi.org/10.3768/rtipress.2018.op.0053.1805.

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This report presents the results of RTI International Education’s study on teachers' guides across 13 countries and 19 projects. Using quantitative and qualitative methods, we examine how teachers’ guides across the projects differ and find substantial variation in the design and structure of the documents. We develop a scripting index so that the scripting levels of the guides can be compared across projects. The impact results of the programs that use teachers’ guides show significant impacts on learning outcomes, associated with approximately an additional half year of learning, showing that structured teachers’ guides contribute to improved learning outcomes. During observations, we find that teachers make a variety of changes in their classroom instruction from how the guides are written, showing that the utilization of structured teachers’ guides do not create robotic teachers unable to use their own professional skills to teach children. Unfortunately, many changes that teachers make reduce the amount of group work and interactivity that was described in the guides, suggesting that programs should encourage teachers to more heavily utilize the instructional routines designed in the guide. The report includes a set of research-based guidelines that material developers can use to develop teachers’ guides that will support effective instructional practices and help improve learning outcomes. The key takeaway from the report is that structured teachers' guides improve learning outcomes, but that overly scripted teachers' guides are somewhat less effective than simplified teachers' guides that give specific guidance to the teacher but are not written word for word for each lesson in the guide.
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