scholarly journals The Highest Dam in the World under Construction: The Shuangjiangkou Core-Wall Rockfill Dam

Engineering ◽  
2016 ◽  
Vol 2 (3) ◽  
pp. 274-275 ◽  
Author(s):  
Shanping Li ◽  
Bin Duan
Keyword(s):  
Rockfill Dam ◽  
The World ◽  
Under Construction

Upgrading the Spoke Wheel Stadium Roof Concept

2019 ◽  
Vol 60 (4) ◽  
pp. 249-256
Author(s):  
Massimo Majowiecki ◽  
Stefano Pinardi ◽  
Giovanni Berti ◽  
Luca Patruno
Keyword(s):  
Wind Tunnel ◽  
Conceptual Design ◽  
Design Process ◽  
Structural System ◽  
Numerical Techniques ◽  
Wind Tunnel Tests ◽  
Roof Structure ◽  
Dynamic Analyses ◽  
The World ◽  
Under Construction

The roof structure of Olympic Stadium in Rome had been conceived, studied and realized between the end of 1988 and the April 1990, in total 16 months of work. This roof is the first example of spoke wheel roof structural system, that today is widely applied on many actual Stadiums around the world [1]. Wind tunnel tests on the roof structure have been carried out at the BLWT Lab. of Western Ontario University: at that time, there have been many discussions between the designer and wind tunnel researchers about the integration of wind tunnel tests data into the design process for sub-horizontal wide span roofs.<br/> The conceptual design and the method of wind dynamic analysis has been updated for the Yaoundé roof Stadium, now under construction. The aerodynamic behavior of Yaoundé stadium roof has been tested in London RWDI wind tunnel. Innovative and recently proposed numerical techniques have been adopted to perform dynamic analyses under wind action.<br/> Erection sequences prescribed for roofs of these two Stadiums are both remarkable and advanced: the big lift adopted procedure for the Olympic stadium roof in Rome and the new tie down pre tensioning operation, provided for the Yaoundé stadium cable roof.

Particles Gradation Optimization of Blasting Rockfill Based on Fractal Theory

2011 ◽  
Vol 366 ◽  
pp. 469-473 ◽  
Author(s):  
Sheng Zhu ◽  
Yan Ming Feng ◽  
Shu Rong Feng ◽  
Wu Yi Chen
Keyword(s):  
Fractal Dimension ◽  
Test Data ◽  
Fractal Theory ◽  
Average Diameter ◽  
Optimization Method ◽  
Dry Density ◽  
Rock Blasting ◽  
Rockfill Dam ◽  
Under Construction ◽  
The Relationship

Based on fractal theory, used the index of rockfill compaction characteristics(granularity fractal dimension) which conforms to Talbot curve distribution, combined with blasting schemes and rolling test data of several domestic rockfill dams, the relationship is established between compacted rockfill’s dry density and rock blasting parameters by rockfill granularity fractal dimension and its average diameter, and that provided the basis for rockfill particle grading optimization method. The method is applied by rockfill of JIANGPINGHE dam under construction, and the results show that this method can well reflect the intrinsic relation between rock blasting and rockfill compaction, which can be applied to particle grading design of rockfill dam.

scholarly journals Marginal Architecture [How will we live together?] - a process under construction…

2021 ◽  
Author(s):  
Ana Bordalo ◽  
◽  
Ana paula Rainha ◽  
Keyword(s):  
19Th Century ◽  
Well Being ◽  
Structuring Element ◽  
The World ◽  
Structural Contribution ◽  
Under Construction ◽  
The 19Th Century ◽  
Housing Units ◽  
Health Parameters

The organization of territory and cities is a structuring element for the management of epidemic crises. The existence of basic sanitary structures is, nowadays, an acquired and determined factor for the healthiness of territories, as well as for the structural contribution to the well-being of the populations. Since the 19th century epidemic crises established health parameters for Architecture and Urbanism, which are still a reference today. Almost after one hundred years, where the questions of salubrity were supposed to be consolidated, we find that, suddenly, without advice, new alarm bells rings: we found that the world was not prepared to be closed in its “housing units”. Assuming Portimão as an urban laboratory and as a waterfront city, we will present the process developed for studies, searching for proposals witch solutions look for a contemporary assignment, which imposes to Architecture a principle settled on options of sustainability, impermanence, reuse and recycling.

scholarly journals Ichthyofauna associated with sandy beaches of the rio Machado, tributary of the rio Madeira, northern Brazil

Check List ◽  
2021 ◽  
Vol 17 (6) ◽  
pp. 1593-1600
Author(s):  
Igor David da Costa ◽  
Natalia Neto dos Santos Nunes ◽  
Ilana Rosental Zalmon
Keyword(s):  
Hydroelectric Plant ◽  
Wide Distribution ◽  
Sandy Beaches ◽  
South American ◽  
The World ◽  
Northern Brazil ◽  
Under Construction ◽  
Species Occurrences ◽  
High Threat ◽  
Rio Madeira

The rio Machado is an large tributary of the rio Madeira, and investigations of the ichthyofauna are urgent given the current high threat of habitat loss on account of a hydroelectric plant under construction. Our inventory quantified 9,544 specimens, representing four orders and 38 species. Our study provides an unprecedented list of fish species from a poorly studied South American basin. This basin, which is considered one of the world&rsquo;s biodiversity hotspots, presents high endemism, few cases of co-existence of phylogenetically related lineages, low species diversity, and few species occurrences with wide distribution.

scholarly journals COAST PROTECTION AGAINST THE ACTION OF WAVES AND CURRENTS

1980 ◽  
Vol 1 (17) ◽  
pp. 127
Author(s):  
Leren P. Mikhailov ◽  
Sergei M. Uspenskii
Keyword(s):  
Wave Energy ◽  
Storage Capacity ◽  
Shore Line ◽  
Storage Reservoirs ◽  
The World ◽  
Waves And Currents ◽  
Hydroelectric Projects ◽  
Under Construction ◽  
The Given ◽  
Natural Water Bodies

According to the information available in the USSR, now in the world there are more than 13000 reservoirs with storage capacity over 1 million m? in service and under construction. The largest ones are illustrated in Table 1. In some countries these storage reservoirs constitute rather a great per cent relative to all the reservoirs of the given country. (Table 2). Lately, such reservoirs have substantially grown in number in many countries of the world, especially in the USSR and USA, what is seen from the chart (Fig.1). In this connection, one can conclude on the great area of some reservoirs (reaching sometimes thousands of square kilometers), on their importance in the balance of the controlled runoff, making up in some countries over 95 per cent and on the intensive increase of their storage capacity beginning from the fifties of the present century. The above said is one of the reasons of greater interest in the action of waves and currents of the shore line showing up most intensively on the largest storage reservoirs. The length of the shore line of the USSR reservoirs is over 40000 km. The length of the erosion shores of storage reservoirs at the hydroelectric projects on the Volga and Dnieper River make up more than 30 per cent of the total shoreline of these reservoirs, while that of the reservoirs on the Kama River - 35 per cent. Most intensively the erosion is going on in the first decades of the operation of the reservoirs. The action of waves on the shore results in formation of the underwater slope with a gradient at which the wave energy is dissipated on the shoal, and the shore erosion slows gradually down until it ceases completely. However, it is rather difficult now to determine the period of the shore formation attenuation process in view of the fact that the problem of distribution of wave energy between all the phenomena taking place here is not properly studied yet and it is hot also clear what width and gradient of the shoal can fully baffle the wave energy and how much time it will take for such a shoal to get formed. The observation carried out on the natural water bodies well prove it.

scholarly journals GESTÃO COM RESPONSABILIDADE SOCIOAMBIENTAL: O caso das empresas B

2020 ◽  
Vol 6 (1) ◽  
pp. 112
Author(s):  
Mônica Tatiana Bunese Busarello
Keyword(s):  
Environmental Ethics ◽  
Local Community ◽  
Local Development ◽  
Structured Interview ◽  
Exploratory Approach ◽  
The World ◽  
The One ◽  
Under Construction ◽  
The Impact

Repensar a economia sob o enfoque do ecodesenvolvimento é um desafio por meio das ecossocioeconomias, ou seja, uma outra economia. Entre as experiências existentes, destaca-se o movimento Empresas B que atende uma demanda de consumidores e investidores cada vez mais exigentes e conscientes quando correlacionam a questão ambiental e o impacto no consumo, sob o slogan “não ser a melhor empresa do mundo, mas a melhor para o mundo”. O objetivo da pesquisa é identificar diferentes formas com as quais uma B-Corp pode beneficiar o meio ambiente e a comunidade local. Para isso foi realizado uma pesquisa exploratória na qual se utilizou levantamento bibliográfico, pesquisa documental e entrevista estruturada sobre a experiência do Hotel Evergreen Lodge Yosemite. As empresas B constituem um movimento pragmático de transitoriedade paradigmático entre economias que por um lado possui uma racionalidade de ganhos econômicos de curto prazo, no entanto com prejuízos socioambientais de longo prazo, e por outro lado, uma nova economia, que concilia ganhos ecossocioeconômicos, ainda em construção, no sentido que as experiências estão em curso. São exemplos de como é possível conduzir a gestão de uma empresa de forma economicamente responsável, defendendo princípios de ética social e ambiental em relação ao desenvolvimento local, entendido como comunitário, e suas imbricações com os demais espaços.Palavras-Chave: Ecodesenvolvimento. Ecossocioeconomia. Movimento B. B-Corp.ABSTRACTRethinking the economy from the perspective of ecodevelopment is a challenge through ecosystems and economies, that is, another economy. Among the existing experiences, the Companies B movement stands out, which meets an increasingly demanding and conscious consumer and investor demand when correlating the environmental issue and the impact on consumption, under the slogan “not being the best company in the world, but the best for the world”. The purpose of the research is to identify different ways in which a B-Corp can benefit the environment and the local community. For this, a methodology with a qualitative and exploratory approach was used, in which the bibliographic survey, the documentary research and the structured interview about the experience of the Hotel Evergreen Lodge Yosemite were used as technical procedures. Companies B constitute a pragmatic movement of paradigmatic transience between economies that on the one hand have a rationality of short-term economic gains, however with long-term socio-environmental losses, and on the other hand, a new economy, which reconciles ecosystem-economic gains, under construction, in the sense that the experiments are ongoing. Examples of how it is possible to conduct the management of a company in an economically responsible manner, defending principles of social and environmental ethics in relation to local development, understood as community, and its overlap with other spaces.Keywords: Ecodevelopment. Ecosocioeconomy. B-Corp.

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