Relevant bibliographies by topics / Pontoons

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Pontoons'

Author: Grafiati
Published: 4 June 2021
Last updated: 27 February 2023

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Journal articles on the topic "Pontoons"

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Blazich, Frank A. "Inventors and Innovators: Naval Lighterage and Anglo-American Success in the Amphibious Invasions of German-Occupied Europe." Northern Mariner / Le marin du nord 31, no. 2 (November 2, 2021): 125–72. http://dx.doi.org/10.25071/2561-5467.155.

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The amphibious invasions of Sicily, Salerno, and Normandy all made ample use of US Navy landing pontoons. The simple steel box pontoons were the brainchild of civil engineer Captain John N. Laycock, who developed and perfected his inventive design on the eve of American entry into World War II. Once in the conflict, a Royal Navy reserve officer assigned to Combined Operations Headquarters, Captain Thomas A. Hussey, conceptualized innovative uses for the American pontoons for offensive amphibious operations. Working together, these men developed pontoon causeways and massive lighterage barges which ensured logistical success in the invasions of German-occupied Europe. Les invasions amphibies de la Sicile, de Salerne et de la Normandie ont toutes fait appel aux pontons de débarquement de la Marine américaine. Les simples pontons flottants en acier ont été créés par le capitaine John N. Laycock, ingénieur civil, qui a développé et perfectionné sa conception géniale à la veille de l’entrée des États-Unis dans la Seconde Guerre mondiale. Une fois le conflit déclenché, le capitaine Thomas A. Hussey, officier de réserve de la Marine royale affecté au quartier général des opérations combinées, a mis au point des utilisations novatrices des pontons américains pour les opérations amphibies offensives. La collaboration de ces deux hommes a permis de développer des chaussées de pontons et d’énormes barges de chalandage qui ont assuré le succès logistique des invasions de l’Europe occupée par les Allemands.
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Freeman, Elizabeth L., Kristen D. Splinter, Ron J. Cox, and Francois Flocard. "Dynamic Motions of Piled Floating Pontoons Due to Boat Wake and Their Impact on Postural Stability and Safety." Journal of Marine Science and Engineering 10, no. 11 (November 2, 2022): 1633. http://dx.doi.org/10.3390/jmse10111633.

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Piled floating pontoons are public access structures that provide a link between land and sea. Despite floating pontoons being frequented by the public, there is limited data available to coastal or maritime engineers detailing the dynamic motions (acceleration and rotation) of these structures under wave action and the impact of these motions on public comfort and safety to inform their design. This contribution summarises results from a set of laboratory-scale physical model experiments of two varying beam width piled floating pontoons subjected to boat wake conditions. Observed accelerations and roll angles were dependent on beam-to-wavelength ratio (B/L), with the most adverse motion response observed for B/L ~0.5. Internal mass of the pontoon played a secondary role, with larger mass structures experiencing lower accelerations for similar B/L ratios. Importantly, these new experimental results reveal the complex interaction between the piles and pontoon that result in peak accelerations more than six times the nominated operational safe motion limit of 0.1g. Root mean square (RMS) accelerations were more than three times the nominated comfort limit (0.02g) and angles of rotation more than double what would be perceived as safe (6 degrees) for the boat wake conditions tested. The frequency of acceleration also suggests patrons standing on these platforms are likely to experience discomfort and instability. Laboratory results are compared against a series of field-scale experiments of pontoon motion response and patron feedback. The dynamic motion response of pontoons tested in both field-scale and laboratory experiments compared well.
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Rajabi, Meysam, Hassan Ghassemi, and Hamidreza Ghafari. "Homogeneous Wave Load Effects on the Connections of Main Parts of Side-Anchored Straight Floating Bridge." Mathematical Problems in Engineering 2021 (July 13, 2021): 1–15. http://dx.doi.org/10.1155/2021/2855051.

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In this paper, a numerical study is presented to investigate wave force on the connections of main parts of a side-anchored straight floating bridge concept for the Bjørnafjorden fjord crossing. The floating bridge is supported by 18 pontoons, and three groups of mooring lines are employed to restrain the bridge against horizontal loads and increase its transverse stiffness. The created wave forces at the connections of pontoon-column and column-girder of the floating bridge considering the effects of short-crested and long-crested waves, varying wave direction, hydrodynamic interaction between pontoons, and mooring system are analyzed. It is found that short-crested and long-crested waves depending on their direction decrease or increase the wave forces on the joints. Considering that the effect of hydrodynamic interaction between pontoons can increase or reduce the wave forces and moments created in the joints, which means the neglect of the hydrodynamic interaction effects between the pontoons to simplify the modeling of this type of floating bridge, may be unacceptable. Moreover, the results showed that the bridge mooring system does not merely reduce the wave forces and moments at joints along the bridge.
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Windyandari, Aulia, and Ahmad Fauzan Zakki. "RANCANG BANGUN MODULAR FLOATING PONTOON FERROCEMENT SEBAGAI ALAT APUNG MULTIGUNA." ROTASI 16, no. 4 (October 1, 2014): 1. http://dx.doi.org/10.14710/rotasi.16.4.1-8.

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Modular floating pontoon is a floating device commonly used as civil and marine construction. Pontoon is usually made of steel and high-density polyethylene (HDPE). Although the steel and HDPE has its own advantages and disadvantages in terms of economic, strength, and capacity. However the study of alternative raw materials for modular floating pontoon construction as multipurpose floating equipment is needed. Ferrocement which is familiar in the used for building construction material is an alternative material. Since the material is easy to find and it is such a versatile material that can be mass produced and has the mechanical strength that is simillar to steel and other materials. Following that condition the research is focused on the application of ferrocement technology for modular floating floating pontoon. The results show that the principal dimension of modular floating pontoon are length 80 cm, width 80 cm, height 75 cm, with the lightweight draft of pontoons is 30 cm. The material proportions for the modular floating pontoon are sand 48.2%, cement 34.5% and water 17.3%. Modular floating pontoon series consists of four Pontoons Square compiled with interlink (hook) so that the total of the package pontoon has a 160 cm long, 160 cm wide and 75 cm high.
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Li, Hao, Junhua Chen, Lingjie Bao, and Chuhua Jiang. "Research on Wave Attenuation Performance of Floating Breakwater." Energies 14, no. 24 (December 10, 2021): 8316. http://dx.doi.org/10.3390/en14248316.

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In this study, a new type of double-pontoon floating breakwater was designed to improve the wave attenuation performance through the addition of suspended Savonius propeller-blade. Its hydrodynamic characteristics were studied through numerical simulations and performance-testing experiment. The following investigations were performed in this study: Firstly, wave theory and hydrodynamic theory were combined to calculate the wave attenuation performance and motion response of double-pontoon floating breakwater under linear wave conditions. The numerical results showed that the wave attenuation performance was better under a specific wave period and height, the transmission coefficient reached a relatively small value, and the mooring line tension responded periodically and satisfied the condition of maximum breaking force. Secondly, three key geometric parameters of breakwater were researched, including the relative spacing of pontoons, the relative spacing between pontoons and blades, and the height–diameter ratio of Savonius blades. The calculation results showed that the pontoon spacing was closer to the wavelength and the breakwater wave attenuation performance was better. Lastly, experimental tests were also performed on the new double-pontoon floating breakwater and the results showed that the wave attenuation performance and numerical projections were basically the same, which verified the validity and effectiveness of the design method.
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Igwe, Icho Seimokomoh, and Tolumoye John Ajoko. "Analysis and Design of Steel a Floating Pontoon Jetty for Use in the Coastal Waters of Nigeria." European Journal of Engineering Research and Science 5, no. 9 (September 4, 2020): 1013–21. http://dx.doi.org/10.24018/ejers.2020.5.9.1863.

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Floating pontoons are semi-permanently moored structures on a water body to provide boarding access to commuters. The decision to develop such structures was informed by the need to provide berthing access to river crafts that operate on the coastal waters of Bayelsa State, Nigeria. In this project, a floating pontoon, a gangway, and other supporting structures like scantlings and spud pillars, were designed to meet the needs and environmental requirements of the area. Standards consulted are the DNV Rules for the classification of ships; DNV Rules for the classification of Floating Docks; ABS Rules for Building and Classing Steel Barges; and other relevant Nigeria and Imo standards. The pontoon designed has dimensions: 13 x 12 x 4.8 m; gross tonnage of 15 tonnes; 2nos. of dry tanks of capacity 17.2 m³ and 6nos. of manholes of 450 x 550 mm. The strength of materials analysis was limited to the floating pontoon for limitations of space for this paper. The pontoon and scantling design has been done based on the worst condition of design pressure which is for the maximum submersion draft. Normal grade steel of yield strength 235 MPa is chosen for all members except the pontoon girders, frames and pillars. This is to reduce the material scantlings and to ensure higher strength with lesser scantlings. Longitudinal framing is adopted in the pontoons as the pontoon structure needs more strength in the longitudinal direction.
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Igwe, Icho Seimokomoh, and Tolumoye John Ajoko. "Analysis and Design of Steel a Floating Pontoon Jetty for Use in the Coastal Waters of Nigeria." European Journal of Engineering and Technology Research 5, no. 9 (September 4, 2020): 1013–21. http://dx.doi.org/10.24018/ejeng.2020.5.9.1863.

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Floating pontoons are semi-permanently moored structures on a water body to provide boarding access to commuters. The decision to develop such structures was informed by the need to provide berthing access to river crafts that operate on the coastal waters of Bayelsa State, Nigeria. In this project, a floating pontoon, a gangway, and other supporting structures like scantlings and spud pillars, were designed to meet the needs and environmental requirements of the area. Standards consulted are the DNV Rules for the classification of ships; DNV Rules for the classification of Floating Docks; ABS Rules for Building and Classing Steel Barges; and other relevant Nigeria and Imo standards. The pontoon designed has dimensions: 13 x 12 x 4.8 m; gross tonnage of 15 tonnes; 2nos. of dry tanks of capacity 17.2 m³ and 6nos. of manholes of 450 x 550 mm. The strength of materials analysis was limited to the floating pontoon for limitations of space for this paper. The pontoon and scantling design has been done based on the worst condition of design pressure which is for the maximum submersion draft. Normal grade steel of yield strength 235 MPa is chosen for all members except the pontoon girders, frames and pillars. This is to reduce the material scantlings and to ensure higher strength with lesser scantlings. Longitudinal framing is adopted in the pontoons as the pontoon structure needs more strength in the longitudinal direction.
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Connell, Sean D. "Floating pontoons create novel habitats for subtidal epibiota." Journal of Experimental Marine Biology and Ecology 247, no. 2 (May 2000): 183–94. http://dx.doi.org/10.1016/s0022-0981(00)00147-7.

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Fan, Hongjun, Jianyong Xu, Shunping Wu, Guozheng Shi, and Wenfeng Guan. "LNG bunkering pontoons on inland waters in China." Natural Gas Industry B 5, no. 2 (March 2018): 148–55. http://dx.doi.org/10.1016/j.ngib.2018.04.001.

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Li, Kai, Zhichao Zhao, Songliang Chang, Jiawei Bao, Zhijiang Yuan, and Xiaogang Jiang. "RESEARCH ON DAMAGE CHARACTERISTICS AND PROTECTIVE STRUCTURE DESIGN OF STEEL PONTOONS UNDER NEAR-FIELD EXPLOSION LOAD." Brodogradnja 73, no. 4 (October 1, 2022): 53–77. http://dx.doi.org/10.21278/brod73404.

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The focus of this paper is to investigate the damage characteristics and protective structure design of pontoons as an important barrier for the protection of ports. Two types of protective measures of pontoons are investigated：filling tanks with water and installing springs in tanks. In this paper, the damage characteristics of two types of pontoon side structures under the action of near-field explosion loads are simulated by using LS-DYNA explicit dynamic analysis software and the ALE algorithm. According to the numerical experiment results for filling different volumes of water in the side tanks, the volume of water for the minimum deformation of the shell plate is 100%, and for the first longitudinal bulkhead, it is 30-40%. Moreover, by applying weights to their deformations based on the actual explosion-proof performance requirements of the shell plate and the first longitudinal bulkhead, the pontoon side structure with the best explosion-proof performance can be obtained. The plastic deformation of the pontoon structure equipped with different types of springs is an order of magnitude smaller than that of the ordinary structure and of the pontoon structure filled with a water medium in the positive tanks. The explosive shock wave energy absorbed by the pontoon is effectively reduced by the addition of water or springs to the protective tanks. The minimum energy absorbed by the pontoon structure with water added in the protective tanks is 18.31% of the energy absorbed by the ordinary structure, and the corresponding volume ratio of water added in the protective tanks is 100%. The pontoon structure with springs in the side protection tanks absorbs only 7.2% of the energy absorbed by the ordinary structure. Both new side protection structures have demonstrated excellent explosion-proof performance.
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Dissertations / Theses on the topic "Pontoons"

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Rahman, Ahnaf. "Dynamic Analysis of Floating Bridges with Transverse Pontoons." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25640.

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The main objective of this thesis is to analyse the dynamic response of floatingbridges with transverse pontoons, when subjected to harmonic regular waveloads. As a result, a simplified beam model of the Bergsøysundet floating bridge isestablished in the FEM software Abaqus. Additional “synthetic” floating bridgestructures are subsequently built and analysed in a similar manner.The pontoon model already developed in Genie by Abdillah Suyuthi is analysed inHydroD to obtain the pontoon’s structural model and hydrodynamic parameters.In addition to these parameters, by implementing his calculated data of mass andsectional properties of the bridge truss-work components, the simplified beammodel of the bridge is developed in Abaqus. Taking the Bergsøysundet floatingbridge model as the basis, “synthetic” bridge models are similarly assembled andstudied. The effect of sideway mooring is also considered for some of the models.Eigenfrequency analysis is then carried out in Abaqus in order to determine thefrequency of the fundamental mode of a model. The eigenfrequency and addedmass are updated by iteration until they are concurrent. Static and dynamicanalysis are then carried out for the model. The regular wave load correspondingto the updated frequency of the mode is acquired from the hydrodynamic analysisin HydroD and applied in Abaqus.Efficient techniques are presented to calculate the phase difference at eachpontoon. This arises due to the combined effect of changing wave direction andshapes of the models.A simplified method is employed to gauge the critical angle of wave heading. Theeffect of wave spreading is also assessed in a streamlined manner based ondiscussion with the supervisor.Limitations with regard to the non application of full matrices of the pontoon’sstructural model and hydrodynamic parameters are highlighted. Negativelydamped sway motions are controlled by the application of external lateraldampers. Mixed results are obtained at the estimated critical angles. Better resultis obtained by iteration of the responses for growing angles of wave heading. Thewave spreading response result is satisfying
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Heimbürger, Anna, and Pauline Liljeroth. "Vision Sjöhem : Framtagning av förslagshandlingar för flytande bostäder." Thesis, KTH, Byggteknik och design, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147622.

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Stockholm lider idag av omfattande bostadsbrist och ständigt ökande befolkningsmängd. För att möta detta ökande behov av bostäder i Stockholm finns en nödvändighet i att utforska nya vägar till att åstadkomma detta. Här finns en unik möjlighet till en förtätning av staden genom att utnyttja Stockholms stora vattenarealer för att bygga flytande bostäder. Som alternativ till den traditionella byggkonsten ämnar examensarbetet till att demonstrera de kvaliteter som finns med att bo på vatten genom att utforma ett attraktivt bostadsområde med flytande konstruktion. Projektet illustreras i det tidigare hamnområdet vid Liljeholmskajen i Årstadals hamn, Stockholm. För att åstadkomma detta utförs fallstudier på olika typer av flytande konstruktioner som finns på den svenska marknaden för att fastställa de bästa konstruktionslösningarna som leder till färdiga förslagshandlingar. Resultatet visar att ett flytande bostadsområde är genomförbart med dagens teknik som ett sätt att förtäta staden. Vidare utredningar måste dock göras för att i framtiden legalisera och förenkla lagstiftningen kring denna typ av boende.
Present day, Stockholm suffers from a significant lack of dwellings and the population in the county is ever increasing. To meet this escalating demand for residences it is essential to explore new paths of accomplishing this. Here lies a unique opportunity for densification of the city by taking advantage of Stockholm’s grand water areal to build floating residences. This essay aims to demonstrate an alternative to the traditional arts of building construction by presenting the qualities of living on water in a proposition for a floating residential area. The project is displayed as placed in an old industrial port - Liljeholmskajen - in Årstadal, Stockholm. To achieve this, case studies are made on different types of floating constructions on the Swedish market to establish the best constructional solutions, which have led to complete concept drawings. The result illustrates that a floating residential area is achievable with today’s technology as a method of dealing with the densification of cities. Further investigations are necessary to legalize and simplify the legislation of this type of living
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Bhat, Shankar S. "Performance of twin-pontoon floating breakwaters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0030/NQ27104.pdf.

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Whitney, William Willerson. "Submarine Pontoon Supported Vessel With Active Displacement Contro." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/10945/7800.

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BUOSI, C. C. M. "Pontos singulares e pontos de Galois de quárticas planas singulares." Universidade Federal do Espírito Santo, 2011. http://repositorio.ufes.br/handle/10/4776.

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Made available in DSpace on 2016-08-29T15:35:57Z (GMT). No. of bitstreams: 1 tese_5026_.pdf: 387273 bytes, checksum: e056114288fed16d3d17bf49a24b91b6 (MD5) Previous issue date: 2011-08-04
Neste trabalho estudamos curvas planas projetivas singulares de grau quatro e seus pontos de Galois. Para isto, fixamos k, um corpo algebricamente fechado de característica zero, como o corpo de base de nossa discussão. Para entender a estrutura dos corpos de funções dessas curvas, usamos projeções: escolhemos um ponto P ∈ P2 e projetamos uma curva C ⊂ P2 sobre uma reta a partir de P, que ́é o centro da projeção. Esta projeção induz a extensão de corpos k(C) | k(P1 ), onde k(C) ́é o corpo de funções racionais de C. Queremos saber se existem corpos intermediários nesta extensão. Analisamos duas situações: P pertence à curva C e P não pertence a C.
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Peterson, Scott Thomas. "Experimental response and analysis of the Evergreen Point Floating Bridge." Connect to this title online, 2002. http://www.dissertations.wsu.edu/dissertations/Fall2002/s%5Fpeterson%5F102102.pdf.

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Mercado, Carlos Alberto Salazar. "Sobre a existência de pontos homoclínicos em vizinhanças de pontos fixos elípticos." Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/EABA-98JJTP.

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In this dissertation, we study certain aspects of symplectic diffeomorphisms in the plane near an elliptic fixed points. Our approach considers a Birkhoff formal norm to ensure the existence of hyperbolic and elliptic periodic orbits in every neighborhood of the elliptic fixed point and it will be shown that the set of real analytic symplectic diffeomorphisms with elliptic fixed point at zero and have elliptical orbits and hyperbolic in every neighborhood of zero is a residual subset. We will develop the theory of local invariant manifolds, we get a representation of the invariant manifolds as graph functions. Thus, you can ensure the proximity of the stable and unstable varieties two hyperbolic points in the same orbit. Finally, using the fact that diffeomorphism preserves area, prove that the stable and unstable varieties actually have the intersection point, thus obtaining an called homoclinic points. The main reference is a paper of Edward Zehnder [1] \Homoclinic points near elliptic fixed points".
Nesse trabalho, estudaremos o comportamento genérico dos difeomorfismos simpléticos no plano em torno de um ponto fixo elíptico. Nossa abordagem utiliza a forma normal de Birkhoff para garantir a existência de órbitas periódicas hiperbólicas e elípticas em cada vizinhança do ponto fixo elíptico e será mostrado que o conjunto dos difeomorfismos simpléticos analíticos reais, com ponto fixo elíptico no zero e que possuem órbitas elípticas e hiperbólicas em toda vizinhança do zero é um subconjunto residual. Desenvolveremos a teoria de variedades invariantes locais, e obtemos uma representação das variedades invariantes como gráfico de funções. Assim, será possível garantir a proximidade das variedades estável e instável de dois pontos hiperbólicos da mesma órbita. Finalmente, usando que o difeomorfismo preserva área demonstraremos que as variedades estável e instável de fato possuem ponto de interseção, obtendo assim, os pontos homoclínicos. A principal referência é o artigo do Edward Zehnder [1] \Pontos homoclínicos perto de pontos fixos elípticos".
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Nakano, Anderson Luis. "Superfícies de pontos dinâmicas." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-06052009-144752/.

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O estudo do comportamento de fluidos é um antigo domínio das ciências da natureza. Ultimamente, fenômenos de engenharia que eram estudados empiricamente passaram a ser estudados com auxílio computacional. A Dinâmica de Fluidos Computacional (DFC) é a área da ciência da computação que estuda métodos computacionais para simulação de escoamento de fluidos, e muitas vezes é a forma mais prática, ou a única, de se observar fenômenos de interesse no escoamento. Este projeto de Mestrado procurou investigar, no âmbito da simulação de um escoamento bifásico, métodos computacionais para representar a interface entre dois fluidos imiscíveis. A separação dos fluidos por meio de uma interface é necessária para assegurar que, propriedades como viscosidade e densidade, específicas de cada fluido, sejam utilizadas corretamente para o cálculo do movimento de seus respectivos fluidos. Desenvolvemos um método lagrangeano sem a utilização de malhas com o objetivo de suprir algumas restrições de trabalhos prévios. Para representar a interface entre os dois fluidos, este método utiliza uma técnica de reconstrução de superfícies baseada em aproximações de superfícies algébricas de alta ordem. Os resultados numéricos reportados neste documento evidenciam o potencial da nossa abordagem
The study of the behaviour of fluids is an ancient field in natural sciences. Recently, engineering phenomena that were empirically studied started to be done with computacional aid. The Computational Fluid Dynamics (CFD) is the area of science that studies computational methods for computer simulation of fluid flow, and often is the most practical way, or the only, to observe phenomena of interest in flow. This Masters degree project sought to investigate, in the context of the simulation of biphasic flows, computational methods to represent the interface between two immiscible fluids. The separation of fluids by the means of an interface is required to ensure that, during the simulation, the physical properties of a fluid, like density and viscosity (specific of each fluid) are properly used in the calculus of the respective fluid motion. We developed a lagrangean method without the use of mesh with the goal of alleviating some of the previous works restrictions. To represent the interface between the two fluids, this method uses a surface reconstruction technique based on approximations of high order algebraic surfaces. The numerical results reported herein show the potential of our approach
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Rodriguez, Joan Neylo da Cruz. "Análise geoestatística multi-pontos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-20092013-113449/.

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Estimativa e simulação baseados na estatística de dois pontos têm sido usadas desde a década de 1960 na análise geoestatístico. Esses métodos dependem do modelo de correlação espacial derivado da bem conhecida função semivariograma. Entretanto, a função semivariograma não pode descrever a heterogeneidade geológica encontrada em depósitos minerais e reservatórios de petróleo. Assim, ao invés de usar a estatística de dois pontos, a geoestatística multi-pontos, baseada em distribuições de probabilidade de múltiplo pontos, tem sido considerada uma alternativa confiável para descrição da heterogeneidade geológica. Nessa tese, o algoritmo multi-ponto é revisado e uma nova solução é proposta. Essa solução é muito melhor que a original, pois evita usar as probabilidades marginais quando um evento que nunca ocorre é encontrado no template. Além disso, para cada realização a zona de incerteza é ressaltada. Uma base de dados sintética foi gerada e usada como imagem de treinamento. A partir dessa base de dados completa, uma amostra com 25 pontos foi extraída. Os resultados mostram que a aproximação proposta proporciona realizações mais confiáveis com zonas de incerteza menores.
Estimation and simulation based on two-point statistics have been used since 1960\'s in geostatistical analysis. These methods depend on the spatial correlation model derived from the well known semivariogram function. However, the semivariogram function cannot describe the geological heterogeneity found in mineral deposits and oil reservoirs. Thus, instead of using two-point statistics, multiple-point geostatistics based on probability distributions of multiple-points has been considered as a reliable alternative for describing the geological heterogeneity. In this thesis, the multiple-point algorithm is revisited and a new solution is proposed. This solution is much better than the former one because it avoids using marginal probabilities when a never occurring event is found in a template. Moreover, for each realization the uncertainty zone is highlighted. A synthetic data base was generated and used as training image. From this exhaustive data set, a sample with 25 points was drawn. Results show that the proposed approach provides more reliable realizations with smaller uncertainty zones.
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Khalil, Elias. "Résistance structurale et durabilité d'un plancher de ponton fait d'extrusions d'aluminium assemblées par insertion rapide." Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/26179.

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Le projet porte sur la résistance structurale et durabilité d’un plancher de ponton fait d’extrusions d’aluminium assemblées par insertion rapide. C’est une étude qui vise à valider le nouveau concept et d’implémenter la technique d’assemblage par insertion rapide dans la construction d’un ponton. Les nouvelles pièces nécessaires au projet sont déjà conçues et la présente étude se limite à l’étude du comportement de la nouvelle structure. Le projet comporte deux parties, numérique et pratique. La partie numérique consiste à effectuer des simulations numériques sur les deux modèles de pontons nouveau et actuel. Les simulations effectuées ont montré que les deux pontons (ancien et nouveau) ont des comportements similaires. Deux cas de chargement ont été analysés, le premier représente un déplacement des pontons sur l’eau et le deuxième impose une torsion sur les structures des deux pontons. Les valeurs des déplacements obtenues pour le premier cas de chargement sont de 1.195 mm et 1.357 mm pour l’ancien et le nouveau ponton respectivement. Pour le deuxième cas de chargement les déplacements sont de 15.18 mm dans le cas du ponton actuel et 13.43 mm pour le nouveau modèle. De plus les contraintes correspondantes à ces déplacements sont très faibles par rapport à la limite élastique de l’aluminium. La valeur maximale obtenue pour tous les tests est de 65 MPa pour le ponton actuel dans le cas de torsion et de 50 MPa pour le nouveau ponton dans les mêmes conditions. Les simulations numériques ne peuvent pas montrer tous les détails de la structure, comme les clips des nouvelles extrusions qui forment le plancher de ponton. Pour tester ces parties il fallait effectuer des essais pratiques en fatigue et en statique sur des sections partielles de 4 extrusions du plancher du nouveau ponton. D’après les tests statiques, on a pu déterminer les configurations des clips qui permettent aux sections partielles de résister à la force appliquée, et de rester assemblées. Ce sont les clips partiels ou complets qui offrent cette résistance. Après les tests statiques, les tests en fatigue ont déterminé que les sections partielles résistent à une force locale de 2 250 N (500 lb) pendant 1 500 000 cycles ce qui équivaut à environ 3500 lbs de charge répartie sur l’ensemble du ponton. Enfin des essais sur l’eau sont réalisés sur un prototype du nouveau ponton. Aucun bris n’est parvenu au niveau des clips et l’analyse des données regroupées durant les tests permet de valider que la structure du nouveau ponton est résistante.
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Books on the topic "Pontoons"

1

Pontonski mostovi. Vinkovci: SN "Privlačica", 1996.

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(firm), Walcon. [Brochure]. [England: s.n., 1995.

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Kruppenbach, Jack. Inflatable concepts. New Holland, PA: Pool Forge Group, 1994.

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Keillor, Garrison. Pontoon. New York: Penguin Group USA, Inc., 2008.

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Keillor, Garrison. Pontoon. London: Faber, 2008.

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Holiday, Thomas. The Holiday guide to pontoon boating. Phoenix, Ariz: Dockside Pub. Co., 1986.

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Keillor, Garrison. Pontoon: A Lake Wobegon novel. London: Faber and Faber, 2008.

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Keillor, Garrison. Pontoon: A Lake Wobegon novel. New York, NY: Viking, 2008.

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Keillor, Garrison. Pontoon: A Lake Wobegon novel. New York: Viking, 2007.

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Garneray, Louis. Un corsaire au bagne: Mes pontons. Paris: Payot, 1992.

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Book chapters on the topic "Pontoons"

1

Komariyah, S., T. Firmandha, and S. Anggara. "Analysis of pontoon primary structure failure." In Advances in the Analysis and Design of Marine Structures, 849–55. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003399759-93.

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Sundaravadivelu, R., R. Natarajan, R. S. Sakthivel, L. Sony, and S. Muthuraman. "Pontoon design and construction methodology of gangway." In Advances in the Analysis and Design of Marine Structures, 857–61. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003399759-94.

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Wang, C. M., and Z. Y. Tay. "Hydroelastic Analysis and Response of Pontoon-Type Very Large Floating Structures." In Fluid Structure Interaction II, 103–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14206-2_5.

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Fu, Zongfu, and Zhongmin Yan. "Experimental Study on Resistance Characteristics in Pulling Process of Pontoon Gate." In Advances in Water Resources and Hydraulic Engineering, 1646–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89465-0_284.

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Islam, H., T. S. Hallak, and C. Guedes Soares. "Simulation of solitary waves and its interaction with fixed floating pontoon." In Trends in Renewable Energies Offshore, 431–39. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003360773-49.

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Manap, Norpadzlihatun, Jung Sem Wong, and Noor Shahifah Syahrom. "The Use of Polystyrene as Substitute of Sand in Pontoon Concrete." In GCEC 2017, 297–305. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8016-6_24.

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Somansundar, Sakthivel, and Rajamanickam Panneer Selvam. "Hydroelastic Responses of a Pontoon-Type VLFS in Different Water Depths." In Lecture Notes in Civil Engineering, 319–31. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3119-0_18.

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Hirono, Yasuhiro, Yoshiaki Mizuchi, Young-Bok Kim, and Yongwoon Choi. "Positional Displacement Measurement of Floating Units Based on Aerial Images for Pontoon Bridges." In AETA 2016: Recent Advances in Electrical Engineering and Related Sciences, 309–15. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50904-4_31.

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Claus, R., F. Soto, A. Cebada, and M. López. "Structural assessment of a pontoon-type floating photovoltaic plant for the marine environment." In Trends in Renewable Energies Offshore, 709–16. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003360773-79.

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Kvåle, Knut Andreas, and Ole Øiseth. "Characterization of the Wave Field Around an Existing End-Supported Pontoon Bridge from Simulated Data." In Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics, 345–59. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78187-7_26.

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Conference papers on the topic "Pontoons"

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Mansour, Alaa M., and Edward W. Huang. "H-Shaped Pontoon Deepwater Floating Production Semisubmersible." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29385.

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This paper presents a new deepwater floating production semisubmersible concept, namely H-Pontoon Semi. The H-pontoon semi consists of an H-shaped pontoon structure which has a pair of parallel longer main pontoons and a pair of shorter secondary central pontoons disposed inwardly from the outer ends of the main pontoons and supported by the two main pontoons. The H-pontoon includes four columns placed at or inboard of the edge of main pontoons. The H-shaped pontoon structure improves the hydrodynamic performance of the platform as compared to conventional ring pontoon structures. The asymmetric pontoon spacing in the horizontal plan provides a reduced horizontal and angular motion in one direction over the other. Additionally, the inward position of the secondary central pontoons facilitates the support of SCR and allows a reduced vertical motion at the SCR fairlead locations. This reduced vertical and horizontal motion at the SCR fairlead help the SCR fatigue and strength design and consequently reduce the SCR associated cost. Numerical results for the global performance of the H-Pontoon platform are presented to illustrate the advantages of the newly developed H-Pontoon Semi concept over the conventional semisubmersible.
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Silva de Souza, Carlos Eduardo, Nuno Fonseca, and Marit Irene Kvittem. "Sensitivity of a Floating Bridge Global Responses to Different Wave Drift Force Models." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-62777.

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Abstract Floating bridges are a promising solution for replacing ferries in the crossing of Norwegian fjords. Their design involves the adoption of accurate, but at the same time efficient models for the loads the structure is subjected to. Wave drift forces at the bridge’s pontoon may excite the bridge’s lower horizontal modes, with consequences to the loads on the bridge and mooring lines. Newman’s approximation is normally adopted to calculate the wave drift forces in such applications. A common simplification is to assume that the pontoons are fixed in the calculation of wave drift coefficients, while it is known that wave frequency motions may significantly influence drift loads. This paper evaluates the consequences of this simplification, in comparison to coefficients obtained considering the pontoons’ motions. First, the effect of the bridge deflection, due to mean drift, on the pontoon’s motions, is evaluated. It is found that this effect is negligible. Then, the RAOs are used in the calculation of wave drift coefficients, showing very different results than those obtained with fixed pontoons. Time-domain simulations are then performed with wave drift coefficients calculated with both approaches, with focus on the bridge girder moments and mooring line tensions. It is shown that using wave drift coefficients obtained with fixed pontoon is a non-conservative simplification, depending on sea state and wave incidence direction.
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Gonçalves, Rodolfo T., Hideyuki Suzuki, Fredi Cenci, André L. C. Fujarra, and Shinichiro Hirabayashi. "Experimental Study of the Effect of the Pontoon Presence on the Flow-Induced Motion of a Semi-Submersible Platform With Four Square Columns." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95250.

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Abstract The Flow-Induced Motions (FIM) is an essential topic on multi-column platforms due to the effect on the mooring line fatigue life. Vortex-Induced Motions (VIM) or galloping behavior can be observed for an array of four columns with square sections. The presence of pontoons showed to be important for changing the flow around the array and promote different amplitude behavior of the motions in the transverse direction mainly. This article aims to understand the effect of the presence of two pontoons on the FIM of a semi-submersible platform (SS) with four columns and square sections. Model tests of a floating system supported elastically utilizing four springs were performed in a towing tank. Five different pontoon ratios were tested, namely P/L = 0, 0.25, 0.50, 0.75 and 1.00; where P is the pontoon height, and L is the length of the square column face. The draft condition was kept constant as H/L = 1.5; where H is the draft of the platform. The spacing ratio of the columns was S/L = 4; where S is the distance between column centers. Three incidence angles of the current were carried out, i.e., 0-deg incidence represents the condition in which the two pontoons are aligned to the current, 45-deg incidence represents the non-symmetric condition in which the pontoons are 45 degrees positioned to the current, and 90-deg incidence represents the condition in which the two pontoons are perpendicular to the current. The transverse amplitudes decreased with increasing the pontoon ratio for 0 and 45-deg incidences. On the other hand, the transverse amplitudes increased with increasing the pontoon ratio for 90-deg incidence. The pontoon presence needs to be well investigated to choose the best condition to avoid raising the FIM.
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Safonov, Aleksandr, and Vitaliy Shkaberin. "FEATURES OF THE METHODOLOGY FOR CALCULATING BUOYANCY AND STRENGTH OF A BLOCK PONTON FOR VERTICAL CYLINDRICAL TANKS." In PROBLEMS OF APPLIED MECHANICS. Bryansk State Technical University, 2020. http://dx.doi.org/10.30987/conferencearticle_5fd1ed03bb3ed8.85303038.

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The paper considers a technique for analyzing the strength and buoyancy of block pontoons for vertical cylindrical tanks used for storing liquid oil products. A model is proposed for performing calculations by the finite element method of a pontoon for buoyancy and strength, taking into account the action of pushing forces. The results of calculations on strength and buoyancy of an aluminum pontoon with foam-urethane filling BPA5000 are presented. It has been established that BPA5000 pontoons have sufficient strength and buoyancy, as regulated by GOST 31385-2016.
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Yoshida, Shoichi. "Buckling Characteristics of Floating Roof Pontoons in Aboveground Storage Tanks Subjected to Both Compressive and Bending Load." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77227.

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The 2003 Tokachi-Oki earthquake caused severe damage to oil storage tanks due to liquid sloshing. Seven single-deck floating roofs had experienced structural problems as evidenced by sinking failure in large diameter tanks at a refinery in Tomakomai, Japan. The pontoons of the floating roofs might be buckled due to circumferential bending moment during the sloshing. The content in the tank was spilled on the floating roof from small failures which were caused in the welding joints of pontoon bottom plate by the buckling. Then the floating roof began to lose buoyancy and sank into the content slowly. The authors had reported the buckling strength of the pontoons subjected to circumferential bending load first and that of the pontoons subjected to both circumferential and radial bending load next in the previous papers. This paper presents the buckling strength of the pontoons subjected to both circumferential bending load and circumferential compressive load. The axisymmetric shell finite element method is used in the analysis. Linear elastic bifurcation buckling analysis is carried out and the buckling characteristics of the pontoon both with and without ring stiffeners are investigated.
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Tajali, Zahra, Mehdi Shafieefar, and Mahmood Akhyani. "Hydrodynamic Analysis of Multi-Body Floating Piers." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57849.

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Hydrodynamic analysis of a floating multi-body pier interacting with incident waves is carried out in the present research and results of wave-induced motions and structural responses are described. The objective is to develop a procedure which can be used to analyze the motions of such a floating structure consisting of a number of rigid pontoons linked together. Also, optimization of pontoons geometry for a desired length of the pier is examined. In this regard, different alternative arrangements of pontoons with different numbers and dimensions are studied and dynamic responses of these alternatives are investigated. Analysis of the multi-body floating structure is carried out in the frequency domain. The wave-induced forces and the responses are computed by three-dimensional diffraction method. To examine the effect of using different pontoons on pier hydrodynamic response, motion-amplitude transfer functions (RAO) and connector forces for a wide range of wave frequency and heading angle are computed. Results include the absolute and relative responses of the individual pontoons and prediction of pier motions for a wide variety of pontoon geometries in different wave frequencies and heading angles. Also results include effects of pontoons dimension on the response of structure and present heave, roll and pitch motions for floating pier structural system.
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Chen, Xujun, Yuji Miao, and Xuefeng Tang. "Hydrodynamic Analysis of Multiple Floating Pontoons With Different Joint Gaps to Waves in Different Water Depth." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62719.

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The hydrodynamic analysis of a multiple pontoon-type floating bridge (FB) interacting with oblique waves in water of finite arbitrary depth can be performed, at least in principle, using a general-purpose radiation-diffraction code. The fluid is assumed to be inviscid, and the flow can be considered as incompressible and irrotational, and the velocity potentials are calculated by boundary element method. To study the influences of the water depth and the gap between bodies on the hydrodynamic properties of the pontoons, RAOs (Response Amplitude Operators) of modes of each pontoon versus the wave frequencies are calculated and presented. The results show that the RAOs of pitch modes of different pontoons have differences in high frequency in heading waves, and those RAOs differences of heave of different pontoons in heading and oblique waves are small. Furthermore, all the others results nearly match into one. The influences of width of the gap between pontoons to RAOs are small, but the water depth has obvious influence on RAOs. In addition, the motions of FB are simulated and compared in different sea conditions which are represented by the JONSWAP spectrum. The results show that not only the peak wave periods but also the significant wave heights have obvious influences on the motions of the FB.
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Yoshida, Shoichi, and Kazuhiro Kitamura. "Buckling Characteristics of Floating Roof Pontoons in Aboveground Storage Tanks Subjected to Bending Load in Two Directions." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61085.

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The 2003 Tokachi-Oki earthquake caused severe damage to aboveground oil storage tanks due to liquid sloshing. Seven single-deck floating roofs had experienced structural problems as evidenced by sinking failure in large diameter tanks at the refinery in Tomakomai, Japan. The pontoons of the floating roofs might be buckled due to circumferential bending moment during the sloshing. The content in the tank was spilled on the floating roof from small failures which were caused at the welding joints of pontoon bottom plate by the buckling. Then the floating roof began to lose buoyancy and submerged into the content slowly. The authors had reported the buckling strength of the pontoons with and without ring stiffeners subjected to circumferential bending load in the previous papers. This paper presents the buckling strength of the pontoons subjected to both circumferential and radial bending load. The axisymmetric shell finite element method is used in the analysis. Linear elastic bifurcation buckling analysis is carried out and the buckling characteristics of the pontoon with and without ring stiffeners are investigated.
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9

Gonçalves, Rodolfo T., Hideyuki Suzuki, Matheus A. Marques, Leandro S. P. Silva, Chenling Tian, and Shinichiro Hirabayashi. "Experimental Study of the Effect of the Pontoon Dimensions on the Flow-Induced Motions (FIM) of a Semi-Submersible Platform With Four Square Columns." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18009.

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Abstract The Flow-Induced Motions (FIM) is an essential topic on multi-column platforms due to the effect on the mooring line fatigue life. Vortex-Induced Motions (VIM) or galloping behavior can be observed for an array of four columns with square sections. The presence of pontoons showed to be important for changing the flow around the array and promoting different amplitude behaviors of the motions in the transverse direction mainly. This article aims to understand the effect of the presence of four pontoons on the FIM of a semi-submersible platform (SS) with four square section columns. Model tests of a floating system supported elastically utilizing four springs were performed in a towing tank. Five different pontoon ratios were tested, namely P/L = 0, 0.25, 0.50, 0.75, and 1.00; where P is the pontoon height (the dimension in the vertical direction), and L is the length of the square column face. The draft condition was kept constant as H/L = 1.5; where H is the draft of the platform. The spacing ratio of the columns was S/L = 4; where S is the distance between column centers. Two incidence angles of the current were carried out, namely 0 and 45 degrees. The amplitudes in the transverse direction (direction perpendicular to the incidence current) decreased by increasing the pontoon ratio for 0 and 45-deg incidences. The pontoons positioned aligned to the flow significantly reduced the amplitudes in the transverse direction since the pontoon presence in this position modified the incident wake in the downstream columns. The pontoon presence needs to be well investigated to choose the best condition to avoid raising the FIM or mitigating the FIM.
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10

Shao, Yanlin, Xu Xiang, and Jianyu Liu. "Numerical Investigation of Wave-Frequency Pontoon Responses of a Floating Bridge Based on Model Test Results." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96545.

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Abstract The wave-induced responses in the bridge girder of long floating bridges supported by pontoons are often dominated by the vertical modes, coupled horizontal modes and rotational modes about the longitudinal axis of the bridge girder. Pontoons with and without bottom flanges have been seen in recent floating bridge designs. Viscous flow separation around the sharp edges of the pontoon or the bottom flange may have strong influences on the hydrodynamic performance of the pontoon in terms of wave excitation, added mass and damping effects. Morison-type wave and current loads are normally included empirically in the early design phases to account for the viscous effects that cannot be covered by a potential-flow solution alone. Empirical drag coefficients and perhaps a correction to the potential-flow added mass are the inputs to such numerical models, which represents a part of the modelling uncertainties. Previous sensitivity studies using different drag coefficients in the ongoing Bjørnafjord floating bridge project in Norway indicate an influence up to 15% on the maximum vertical bending moment around the weak axis of the bridge girder. This paper contributes to the understanding of viscous effects on the hydrodynamic characteristics, e.g. the added mass, damping and wave excitation loads, of a floating bridge pontoon with and without keel plate. This is achieved by exploring existing model tests for floating bridge pontoons, performing 2D Computational Fluid Dynamic (CFD) analysis for pontoon cross sections and numerical calibration in a simplified frequency-domain model with linearized drag loads. Scale effects are also investigated through CFD analyses in model and full scales.
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Reports on the topic "Pontoons"

1

Paulen, R. C., and A. Plouffe. Surficial geology of the Bushe River - Ponton River area (NTS 84K/NE). Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2007. http://dx.doi.org/10.4095/223766.

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Hirota, Marina, Carlos A. Nobre, Ane Alencar, Julia Areiera, Francisco de Assis Costa, Bernardo Flores, Clarissa Gandour, et al. Policy Brief: Um Chamado de Ação Global para Evitar os ‘Pontos de Não-Retorno da Floresta Amazônica. Sustainable Development Solutions Network (SDSN), November 2022. http://dx.doi.org/10.55161/wmsa6060.

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Territórios Indígenas (TIs) na Amazônia protegem aproximadamente 24.5 gigatoneladas de carbono (GtC) acima do solo, atuam como barreiras significativas contra o desmatamento e a degradação florestal, e funcionam como importantes amortecedores contra as mudanças climáticas. TIs demarcadas apresentam desmatamento significativamente menor do que terras não reconhecidas oficialmente, demonstrando a importância de se demarcar TIs tanto para proteger os meios de subsistência e as culturas dos povos nativos da Amazônia, quanto para conservar suas florestas e rios.
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Hirota, Marina, Carlos A. Nobre, Ane Alencar, Julia Areiera, Francisco de Assis Costa, Bernardo Flores, Clarissa Gandour, et al. Versão Extendida: Um Chamado de Ação Global para Evitar os ‘Pontos de Não-Retorno da Floresta Amazônica. Sustainable Development Solutions Network (SDSN), November 2022. http://dx.doi.org/10.55161/dtvl4743.

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Territórios Indígenas (TIs) na Amazônia protegem aproximadamente 24.5 gigatoneladas de carbono (GtC) acima do solo, atuam como barreiras significativas contra o desmatamento e a degradação florestal, e funcionam como importantes amortecedores contra as mudanças climáticas. TIs demarcadas apresentam desmatamento significativamente menor do que terras não reconhecidas oficialmente, demonstrando a importância de se demarcar TIs tanto para proteger os meios de subsistência e as culturas dos povos nativos da Amazônia, quanto para conservar suas florestas e rios.
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Petz, Dávid. Infláció a Kínai Népköztársaságban nemzetközi összehasonlítással I. Külügyi és Külgazdasági Intézet, 2022. http://dx.doi.org/10.47683/kkielemzesek.ke-2022.59.

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A nyugati országokat vizsgálva, de akár globális kitekintéssel nézve is megállapítható, hogy számos állam küzd évtizedek óta nem tapasztalt inflációval. Ezzel szemben a világ második legnagyobb gazdasága, a Kínai Népköztársaság az idén is alacsony inflációs rátát produkált az októberi adatokig bezárólag vizsgálva. A kínai nyilvános statisztikai adatszolgáltatás részletessége elmarad ugyan a nyugati országokétól, de a kínai statisztikai hivatal és más állami szervek közölnek annyi információt, amely alapján megközelítőleg pontos képet kaphatunk az inflációs trendekről. Az elemzés első része megvizsgálja a kínai statisztikai hivatal által alkalmazott módszertant, fogyasztói kosarat és annak súlyozását, majd azt összeveti a magyar, a német és az amerikai fogyasztói kosárral. Ezt követően három évre visszamenőleg bemutatja Kína és a három nyugati ország inflációs trendjeit. Végezetül ismerteti, hogy a Kínai Népköztársaságban mi alapján különül el a városi és a vidéki infláció.
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Martínez Fritscher, André, Maria Cristina Mac Dowell, Soraya Naffah Ferreira, and Ricardo Gazel. A modernização fiscal dos estados brasileiros e seu impacto arrecadatório e econômico: o caso do Profisco. Inter-American Development Bank, May 2022. http://dx.doi.org/10.18235/0004247.

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Este artigo analisa o impacto do Projeto de Modernização da Gestão Fiscal dos Estados (Profisco I), financiado pelo Banco Interamericano de Desenvolvimento, na arrecadação estadual, número de empresas locais e remuneração de seus trabalhadores. Desde 2009, o Profisco I foi implantado em 2 3 das 27 unidades federativas, permitindo digitalizar documentos fiscais e melhorar os sistemas de processamento de dados fiscais e as capacidades de análise dessas informações pelas administrações tributárias. Usando uma metodologia de diferenças em diferenças, considerando que a adesão foi faseada e nem todos os estados o implantaram, estima-se que o programa contribuiu para que os estados incrementassem em 11,7% e 1 ,7%, respectivamente, sua arrecadação total e o número de unidades locais de empresas formais. Os potenciais mecanismos que levaram a esses resultados estão relacionados a uma mudança no cumprimento tributário devido à simplificação das declarações e ao aumento da capacidade real e percebida da autoridade tributária na detecção de irregularidades. Isso levou a: (i) uma diminuição do custo de fazer negócios, permitindo realocação de recursos para atividades mais substantivas e que possam acarretar maior produtividade laboral e salários; e (ii) maior compliance tributária e empresarial de toda a cadeia produtiva, pela crença de que práticas indevidas serão detectadas mais facilmente. Adicionalmente, são identificadas complementariedades entre o Profisco e a Nota Fiscal Eletrônica. Por fim, estima-se que o gap tributário reduziu 6 pontos percentuais entre 2012 e 2019, como evidência complementar de que as capacidades dos fiscos estaduais foram incrementadas no período, permitindo aumentar a eficiência arrecadatória.
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Consentimento informado nos ensaios de prevenção do HIV: Pontos altos dum workshop internacional. Population Council, 2008. http://dx.doi.org/10.31899/hiv11.1014.

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Inteligência DWRI X Múltiplas Inteligências DWRI X Multiple Intelligences. CPAH REDAÇÃO, February 2023. http://dx.doi.org/10.56238/cpahciencia-002.

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Abstract:
Nova versão de estudo sobre a inteligência DWRI reforça conceito e o diferencia de Múltiplas Inteligências Desde quando foi publicado, o primeiro estudo que trouxe à luz o conceito de um novo tipo de inteligência, a DWRI, causou muito debate, o que é comum com uma nova ideia tão importante quanto essa. Uma das principais questões era a diferenciação entre a DWRI e as Múltiplas Inteligências, e esse é justamente um dos principais pontos dessa nova versão do estudo original chamada “Inteligência DWRI”, publicado pela “Recisatec - Revista Científica Saúde e Tecnologia”. Ao contrário de Múltiplas Inteligências (MI) que são desenvolvimentos em várias áreas do conhecimento, a inteligência DWRI, além dessa característica, também é um tipo de inteligência precursora, responsável por gerenciar as demais. A inteligência DWRI só é percebida em menos de 1% da população mundial e quem a possui, normalmente tem mais de 90 de percentil de QI nos testes tradicionais, mas apesar disso, somente esses testes não são capazes de determiná-la, sendo necessário testes mais profundos e detalhados. Ela não possui uma ótica separatista do conceito de Múltiplas Inteligências, todas as suas partes são interconectadas para formar um todo, ela possui um padrão comportamental específico, como ressalto no artigo “Para ser considerado DWRI, o indivíduo precisa ter um alto QI e todas as regiões relacionadas com a inteligência bem desenvolvidas”. Além disso, o novo estudo possui novos dados, depoimentos, análise observacional, questionário de pessoas de alto QI e etc., que reforçam o conceito da DWRI.
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