Timber - Science topic

The hall-style timber frame built in the Song and Yuan dynasties (960–1368 AD) is one of the most important structural prototypes of the traditional timber architecture in East Asia. The current research, through a typical case of the main hall of Baoguo Temple in Ningbo, China, aims to present an accurate and effective seismic performance evaluati...

Planting density is one of the important factors affecting soil properties, thereby directly impacting plantation yields. However, the effect of planting density on soil quality and productivity in plantation ecosystem mostly remain unknown. The present study aims to assess soil quality in four mature pine (Pinus kesiya) plantations with increasing...

The performance of structural timber connections is of utmost importance since they control the global response of the building. A ductile failure mechanism on the global scale is desirable, especially in the design of structures in seismic areas, where dissipative components in which ductile failure modes need to be ensured are considered. Therefo...

Forest structure and natural regeneration of mountain pine (Podocarpus parlatorei Pilg.) populations in the department of Santa Cruz, Bolivia. The mountain pine (Podocarpus parlatorei Pilg.) is endemic to the southern montane forests, historically over-exploited for timber purposes and currently is in danger of extinction. In Bolivia, also presents...

This paper addresses the vibration characteristics of a cross laminated timber (CLT) floor in a residential building during three construction states. Experimental modal analyses are carried out on the blank CLT slab, on the slab with added drywall ceiling, and on the slab with drywall ceiling and added floating screed. A reliable numerical model o...

Hành tinh của chúng ta đang tan vỡ" ("the state of the planet is broken") - Tổng thư ký Liên Hợp Quốc Antonio Guterres mô tả như vậy về biến đổi khí hậu trong bài phát biểu ngày 2/12/2020 tại Đại học Columbia, New York. Chúng ta nói về biến đổi khí hậu rất nhiều, nhưng không phải ai cũng biết rõ mức độ nghiêm trọng thực sự của biến đổi khí hậu. Tro...

Trong bối cảnh cách mạng công nghệ 4.0, Fintech không chỉ tác động đến hoạt động của các ngân hàng mà còn đóng vai trò quan trọng đến hoạt động của các doanh nghiệp, cá nhân trong cuộc sống hiện đại. Sự phát triển mạnh mẽ của công nghệ số khiến các Ngân hàng thương mại có sự chuyển dịch mạnh mẽ từ mô hình kinh doanh truyền thống sang mô hình ng...

Myanmar seized power AND Myanmar’s tainted timber Myanmar’s tainted timber and the military coup - EIA https://eia-international.org/forests/myanmars-tainted-timber-and-the-military-coup/

En la Región Chaqueña, el sobreuso forestal y el avance de la frontera agropecuaria aumentaron la presión sobre tierras forestales para reconvertirlas a diferentes usos con la consiguiente degradación y desaparición de grandes superficies de bosques naturales. Por consiguiente, las plantaciones forestales representarán a medio plazo la fuente más i...

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This study aims (i) to know the degree of acceptability of variants with the verb ter and have in existential constructions and whether the evaluation made by the educated speakers of Funchal (Madeira Island), region where the non-standard variant with ter is in use, is distinct or not from speakers from other regions of mainland (Portugal), and (i...

La degradación de los bosques implica un proceso de cambio que afecta negativamente las características de un bosque, de manera tal que el valor y la producción de bienes y servicios reducen su capacidad. Por eso, su evaluación es siempre complicada, ya que es un proceso multicausal y de intensidad variable. Los bosques nativos de Argentina produce...

A pesar de la poca estructuración formal del mercado de maderas en Santiago del Estero, existe la necesidad de generar información y un mayor conocimiento de la dinámica del mercado, con el propósito de contribuir a la implementación de estrategias que impulsen el desarrollo del sector forestal y su inserción comercial en la región. Con el objetivo...

This paper evaluated a relationship between torsional irregularity and plan layouts of Korean traditional timber houses, Hanok. The plan types of Hanok is categorized as straight-lined, L-shaped, T-shaped, C-shaped, and closed rectangular shape. Plan types of Hanok plays an key role in determining the centers of mass and the center of stiffness. Si...

This paper reports on the use of chloropicrin to control decay in a southern pine laminated arch. A treatment plan was formulated to obtain information on 1) the effectiveness of a vapor wrap in containing fumigant vapors in the wood, 2) the effects of gluelines, finger-joints, and grain orientation on the diffusion of chloropicrin in the timber, a...

Biografía de la historiadora puertorriqueña Loida Figueroa Mercado (1917-1996). Publicada en “Figueroa Mercado, Loida” en Franklin Knight y Henry Louis Gates, eds. Oxford Dictionary of Caribbean and Afro-Latin American Biography. W.E.B. Du Bois Institute for African & African American Research: Oxford University Press, 2016.

The pretension force for bolted timber joints increases the frictional resistance between the clamping wood and steel plate. Increasing the frictional resistance improves joint stiffness and strength. External tensile load causes the pretension loss in bolted timber joints, but this mechanism remains unclear. This study investigated the mechanism o...

La familia Arecaceae (antes Palmae) o también conocida como la familia de las palmeras comprende un grupo de plantas de carácter arbóreo o arbustivo que mantiene su follaje durante todo el año y al observarlas, crean en nuestra mente imágenes de climas tropicales y subtropicales, playas de arena blanca y por supuesto vacaciones. Las mismas presenta...

Robustness research has become popular, however very little is known on its explicit quantification. This paper summarises a quantification method previously published by the main author and proceeds in demonstrating its step-by-step application with a case study tall timber building. A hypothetical 15-storey post-and-beam timber building with a ce...

Timber pile has been traditionally used as the primary foundation type in the Canadian Arctic. Pile performance is vulnerable to climate change and other environmental impacts that lead to building subsidence or material damage. The wood blocking system, one of the building remediation techniques in the Arctic, is a relatively new method for replac...

The main strength and elastic properties of structural timber products, such as glued laminated timber (glulam; GLT) and cross-laminated timber (CLT), are usually described via load-bearing models, which use the tensile properties parallel to the grain of the base material boards and finger joints as input parameters. These load-bearing models assu...

In order to watch our surroundings and physical circumstances, a Wireless sensing element network is formed from many sensing element hubs, every of that includes a preparation unit, a minimum of one sensing element, a broadcast for data communication, and an influence unit usually equipped with low limit energy. Since these systems square measure...

Novel solutions with large-diameter connectors for cross-laminated timber (CLT) assemblies require wood brittle failure to be avoided through capacity-design-based provisions to protect the CLT panels. Current design standards, such as the Canadian Standard for Engineering Design in Wood (CSA-O86), do not cover the block tear-out resistance of CLT...

A new timber frame structural system consisting of continuous columns, prefabricated hollow box timber decks and beam-to-column moment-resisting connections is investigated. The hollow box timber decks allow long spans with competitive floor height and efficient material consumption. To achieve long spans, semi-rigid connections at the corners of d...

This study aims to systematically investigate the mechanical properties of bamboo scrimber (BS) along three main loading directions. Through tensile, compression, and shear tests, the mechanical properties of BS were obtained and compared with those of other engineering timber or bamboo products. The results illustrated that the mechanical properti...

A library of prefabricated parts and assemblies, i.e. module library, can help a firm in the construction industry transition to a more industrialized and product-oriented approach. However, existing approaches to manage such libraries are oriented around single-use projects. There is need for a more flexible data structure to support storage, anal...

To identify the time spent with the different construction techniques of timber houses, this study evaluates the execution time of different models available in Brazil. Using face-to-face interviews, semi-structured questionnaires were randomly applied to collect average time according to distinct production methods. The most effi cient techniques...

Kỹ năng biên soạn bản thảo bài báo khoa học ThS. Nguyễn Minh Trí Giám đốc Công ty TNHH Viễn thông NTT Việt Nam Tóm tắt: Việc hoàn thiện bản thảo bài báo để duyệt đăng trên tạp chí khoa học có uy tín là yêu cầu đối với các học giả, nhà nghiên cứu và là một trong những tiêu chí quan trọng để đánh giá năng lực nghiên cứu của nhà khoa học trong bối cản...

Cross-laminated timber (CLT) can be used as an element in various parts of timber structures, such as bridges. Fast-growing hardwood species, like poplar, are useful in regions where there is a lack of wood resources. In this study, the withdrawal resistance of nine types of conventional fasteners (stainless-steel nails, concrete nails and screws,...

This study demonstrates the moment resistance performance of various splice connections of cross-laminated timber (CLT) subjected to flatwise bending. A total of 33 samples in two groups (half-lapped and single-splined) were tested under four-point bending. The influence of fastener types on the half-lapped connections was investigated. Additionall...

Teak plantations are generally managed for timber production and presently there is an increasing interest in understanding the carbon stocks of Teak plantation. A study was developed on carbon yield table for Teak in Cauvery delta zone of Tamil Nadu, India and field data was taken from 15 sample plots of 30 m × 30 m size in different age classes,...

A ascensão de novas sensibilidades em relação aos animais não humanos na cultura contemporânea vem provocando uma ampla revisão de tradições que envolvem o sofrimento de outras espécies. Entre elas, está a Farra do Boi, proibida no Brasil há quase 25 anos, mas que ainda ocorre em diversas regiões do país. A prática envolve a perseguição de bovinos,...

As pontes de madeira exercem papel preponderante para se manter o fluxo de mercadorias e pessoas por diversas regiões, com destaque, principalmente, nas zonas rurais. Para tanto, as pontes de madeira devem apresentar condições satisfatórias para atender ao objetivo supracitado, portanto torna-se necessário a adoção de monitoramento da qualidade da...

Jacaranda mimosifolia es de los árboles ornamentales más comunes en los jardines de clima templado y cálido (Sánchez, 2020). La composición química de la madera y suelo de una especie aporta a su crecimiento estructural de manera significativa. Ante la escasa información con respecto a Jacaranda mimosifolia, surge la necesidad de realizar un estudi...

Résumé La fertilisation est une composante essentielle dans la conduite d’une oliveraie. Elle est destinée à restituer les éléments nutritifs prélevés par la culture au cours de son cycle de développement pour assurer le renouvellement des pousses et la production d’olives et d’huile. Chez l’olivier, les éléments N, P, K et B sont les plus utilisé...

7 Carpentry joints are the traditional connecting media for timber elements. Among those, step-joints are 8 particularly important at structural size, as they are the most frequent solution to connect rafters and tie 9 beams in roof timber trusses. The forthcoming version of Eurocode 5 will include, for the first time, 10 provisions on its design....

El estudio de caracterización química de la madera permite conocer los contenidos de holocelulosa, lignina, extractivos y ceniza, producidos durante el periodo de vida de cada individuo. Estas propiedades químicas ejercen gran influencia en otras propiedades de la madera, como, por ejemplo, físicas, organolépticas y mecánicas (Urrelo et al., 2016).

Since the 1980s, the U.S. Forest Service (USFS) has transformed from an agency predominantly focused on timber production to one focused on recreation and ecosystem management. This shift is particularly remarkable because it occurred without major substantive national forest policy changes. During this period, many national forests changed their f...

Fundado em 1934 pelo professor Felix Kurt Rawitscher (1890-1957), o Departamento de Botânica do Instituto de Biociências da Universidade de São Paulo é atualmente uma referência internacional em pesquisa e ensino. Possui uma equipe formada por 31 docentes (2 aposentados), os quais estão distribuídos em 8 áreas de conhecimento. Apresenta como infrae...

This paper presents the results of a numerical study about the effectiveness of a new multi-component timber retrofit solution for unreinforced masonry buildings in seismic regions. The proposed retrofit consists of timber frames fastened to the internal surface of masonry piers, with oriented strand boards eventually nailed to the frames. This tec...

Será lançado em setembro de 2022, o livro DIVERSIDADE SEXUAL E DE GÉNERO NA ACADEMIA, o primeiro da coleção Coeducação e Inovação Pedagógica, da autoria de José Paulo G. Brazão e Alfrancio Ferreira Dias, comparticipado pelo CNPQ (organismo governamental brasileiro, de apoio à investigação científica). Este livro apresenta uma compilação de trabalho...

Palabras clave: Desechos, zona costera, materiales, plásticos Los desechos antropogénicos se están acumulando en los ecosistemas marinos de todo el mundo. Se encuentra en la superficie del mar. (Pichel, 2007). En playas arenosas (Santos, 2009). La acumulación de desechos plásticos grandes y pequeños es un problema en todos los océanos y costas del...

We present a procedural framework for modeling the annual ring pattern of solid wood with knots. Although wood texturing is a well-studied topic, there have been few previous attempts at modeling knots inside the wood texture. Our method takes the skeletal structure of a tree log as input and produces a three-dimensional scalar field representing t...

Forest farms are the main body of forest management at the landscape-scale in China, and have long sought ways to jointly maximize timber production and other ecosystem services. Carbon sequestration is of particular interest because China has established the goal of becoming carbon neutral by 2060. However, optimizing the balance between timber pr...

The embedment strength is a key parameter in the design of timber connections with metal fasteners. This property can be determined by the equations given by design codes such as the Eurocode 5, which are based on the European Yield Model proposed by Johansen, and it depends on the value of timber density among other parameters. These equations pro...

El guia de anatomia e identificación de 50 especies maderables de Selva Central, Perú es parte del Proyecto MaderApp un aplicativo movil para reconocimento automático y en tiempo real de especies maderables, una herramienta tecnologica que tiene como principal objetivo el apoyo al combate a deforestacion y a la tala ilegal en los bosques Peruanos....

In order to study the mechanical performance and friction slip mechanism of the interface of a composite timber column under inclined deformation, the unilateral contact mechanical model of an ancient composite timber column under inclined deformation is proposed in this paper. According to the limit of the inclination angle of slip point and the l...

Les écosystèmes forestiers jouent un rôle important pour l’environnement parce qu’elles créent des trames écologiques favorables à la biodiversité. Les Ceintures Vertes Villageoises (CVV) de la préfecture de l’Avé constituent un patrimoine forestier dont les composantes ligneuses sont souvent utilisées par les populations riveraines pour satisfaire...

Wood, a renewable source and a material with excellent mechanical properties, is one of the oldest materials used in civil construction. In Brazil, its use is widespread in roof structures in the form of plane trusses. Given the Brazilian context of the growing presence of wood in structural systems, in addition to the normative updating processes,...

This study involves the application of timber-based bracings elements. For this purpose, seismic analyses are performed on special portal steel frames without the brace and diagonally braced with Glued Laminated Timber (glulam) and Timber-Steel Buckling Restrained Brace (TS-BRB), and the results are compared with the same configuration using steel...

trabalho licenciado sob licença Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. RESUMO Os sistemas agrossilvipastoris oferecem benefícios socioeconômicos e ambientais através da associação estruturada, no tempo e no espaço, de elementos agrícolas, arbóreos e forrageiros numa mesma área. Essa pesquisa teve por ob...

Improvements in plastic recycling technology along with pressure to reduce emissions and waste has led to a desire to find environmentally friendly, cost competitive railway sleepers. This study conducts life cycle analyses of emissions and costs for timber, concrete, short fibre and long fibre composite railway sleepers to determine which sleepers...

Crossarms are widely used in power distribution and telecommunication sectors to support overhead cables. These structures are horizontally attached to the top of vertically erected utility poles and are essential elements in connecting overhead cables to the poles. Timber is the dominantly used material type for crossarms in the existing distribut...

RESUMEN: Moler el trigo, hacer la masa para el pan, amasarla y cocerla eran actividades cotidianas en la Sevilla del siglo XVI que se realizaban en los asientos de atahonas y en los hornos (tanto domésticos como comerciales), que bien podían formar parte de una casa o constituir un espacio propio. Según nos indican las fuentes documentales escritas...

La modelización matemática temprana, entendida como un proceso que ayuda a crear los primeros modelos para analizar, explicar y comprender la realidad, es un marco idóneo para implementar un enfoque competencial de las matemáticas. Desde este punto de vista, se presenta la actividad “construimos casas con piezas de madera”, que se ha implementado a...

Incorporating steel bars as reinforcement in glued laminated timber beams is a technique that aims at better structural performance, allowing the reduction of cross-sections. In the present research, based on experimental results from literature about the reinforcement of timbers beams, a parametric study was carried out with the aid of 164 numeric...

The objectives of the training were to equip participants with knowledge on common pests and diseases of nursery tree seeds, seedlings, trees on farm, timber and unveil to them strategies for managing them.

Este artículo corresponde a un número especial publicado en La Jornada del Campo: "El bosque y su gente", en el cual se pretende, mediante la visibilización de diversos artículos interconectados, expresar la variabilidad en las respuestas locales-regionales asociadas al uso y manejo de los recursos forestales maderables y no maderables a lo largo y...

Este artículo corresponde a un número especial publicado en La Jornada del Campo: "El bosque y su gente", en el cual se pretende, mediante la visibilización de diversos artículos interconectados, expresar la variabilidad en las respuestas locales-regionales asociadas al uso y manejo de los recursos forestales maderables y no maderables a lo largo y...

Since the Japanese Building Standards Act was revised in 2000, the installation of steel timber connectors (STCs) to reinforce timber frame (TF) connections has been mandated for new-build TF houses in Japan. However, for the TF houses built before then, more than 40% do not have sufficient STCs and are considered earthquake-prone. This study propo...

Sustainability of building structure must be environmentally stable, easy in usage, and handling or durable. This study considers that wood is an important building material. The main advantage of wood in construction is its strength, environmentally friendly, simple handling, and ease of use in construction. Trees, and their derivative products, h...

Timber construction is a contemporary solution where sales are performed through in-store trade. Timber house e-commerce may stimulate global markets, and in times of intense remote routines, it is useful to improve the performance of the wood and construction sectors. Timber housing producers and dealers are the research object under analysis to s...

The effects of long duration ground motions on the seismic performance of a newly constructed two-storey balloon-type cross-laminated timber (CLT) building located in Vancouver, Canada, was studied. A three-dimensional numerical model of the building was developed in OpenSees. The connection and shear wall models were validated with test data. Twen...

Ngày nay, khi đời sống con người được nâng cao thì việc chăm lo sức khỏe hàng ngày đã trở thành mối quan tâm đặc biệt cho tất cả mọi người. Trước các vấn đề y tế to�