bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nonlinear Oscillations Analysis of the Elevator Cable in a Drum Drive Elevator System
Authors: Askari H. , Younesian D. , Saadatnia Z. 
Published: January 2015

AbstractThis paper aims to investigate nonlinear oscillations of an elevator cable in a drum drive. The governing equation of motion of the objective system is developed by virtue of Lagrangian’s method. A complicated term is broached in the governing equation of the motion of the system owing to existence of multiplication of a quadratic function of velocity with a sinusoidal function of displacement in the kinetic energy of the system. The obtained equation is an example of a well-known category of nonlinear oscillators, namely, non-natural systems. Due to the complex terms in the governing equation, perturbation methods cannot directly extract any closed form expressions for the natural frequency. Unavoidably, different non-perturbative approaches are employed to solve the problem and to elicit a closed-form expression for the natural frequency. Energy balance method, modified energy balance method and variational approach are utilized for frequency analyzing of the system. Frequency-amplitude relationships are analytically obtained for nonlinear vibration of the elevator’s drum. In order to examine accuracy of the obtained results, exact solutions are numerically obtained and then compared with those obtained from approximate closed-form solutions for several cases. In a parametric study for different nonlinear parameters, variation of the natural frequencies against the initial amplitude is investigated. Accuracy of the three different approaches is then discussed for both small and large amplitudes of the oscillations.
Implementation of Multi-GPU Based Lattice Boltzmann Method for Flow Through Porous Media
Authors: Huang Changsheng , Shi Baochang , He Nanzhong , Chai Zhenhua 
Published: January 2015

AbstractThe lattice Boltzmann method (LBM) can gain a great amount of performance benefit by taking advantage of graphics processing unit (GPU) computing, and thus, the GPU, or multi-GPU based LBM can be considered as a promising and competent candidate in the study of large-scale fluid flows. However, the multi-GPU based lattice Boltzmann algorithm has not been studied extensively, especially for simulations of flow in complex geometries. In this paper, through coupling with the message passing interface (MPI) technique, we present an implementation of multi-GPU based LBM for fluid flow through porous media as well as some optimization strategies based on the data structure and layout, which can apparently reduce memory access and completely hide the communication time consumption. Then the performance of the algorithm is tested on a one-node cluster equipped with four Tesla C1060 GPU cards where up to 1732 MFLUPS is achieved for the Poiseuille flow and a nearly linear speedup with the number of GPUs is also observed.
Cultural Worldviews and Contentious Politics:
Authors: Wagner Michael W. , Wells Chris , Friedland Lewis A. , Cramer Katherine J. , Shah Dhavan V. 
Published: January 2015

Abstract
Discussions about whether citizens can learn and use the information necessary to contribute to democratic governance often focus on debates about heuristics. We argue that the debate over whether heuristics should be used misframes a central issue—the consideration of what forms of decision-making are most likely to operate in different kinds of communication environments. This article examines how people make decisions in contentious political climates, which are characterized by high-information volume, relatively strong partisan commitment, and an affective divide between the opposing camps. Our contribution takes account of the possibility that in contentious environments, political communication offers neither reasoned deliberation nor cues, but rather solidarity signals that engage people's cultural worldviews. We also posit that the use of cultural worldviews for liberals and conservatives is asymmetrical—raising important questions about democracy in a society in which a variety of worldviews have different weights for various individuals and publics. To test our perspective, we analyze public opinion data collected during the time surrounding the recall election of Governor Scott Walker of Wisconsin.
Beyond Endorsements and Partisan Cues:
Authors: Gastil John 
Published: January 2015

Abstract
Voters often rely on cognitive shortcuts and partisan cues under low-information conditions. But it would be preferable for voters to adopt deliberative cues so that their low-information vote at least follows the judgements of similar high-information voters. One such deliberative cue is the Oregon Citizens Initiative Review, where citizen panels exhaustively review policy initiatives and report their findings for voters. When exposed to documents produced by the panels, readers become more informed voters and can use their new knowledge to make independent voting choices, rather than relying on judgmental shortcuts and voting cues.
The Life You Save May Not Be Your Own
Authors: kelly Jamie Terence 
Published: January 2015

Abstract
This paper points out an ambiguity in Cass Sunstein's recent work concerning whose lives and interests are to be promoted by libertarian paternalism, and argues that this ambiguity stems from a lack of clarity regarding how we should understand the relevance of the heuristics and biases literature for democratic theory. The paper attempts to extract from Sunstein's work an account of how we should go about identifying biases in social choices. It argues that Sunstein's view on this issue has changed over the years, and identifies a trend in his thinking moving away from libertarian paternalism and toward libertarian welfarism.
EFICIENCIA DE LA PROTECCIÓN CONTRA INCENDIOS FORESTALES EN MONTE ALEGRE, BRASIL Y PINAR DEL RÍO, CUBA
Authors: Rodríguez Marcos Pedro Ramos , Soares Ronaldo Viana , Batista Antonio Carlos , Tetto Alexandre França , Reina Jesús María Cabrera , Becerra Luis Wilfredo Martínez 
Published: January 2015

ResumenPara perfeccionar el sistema de protección contra incendios forestales es importante tener informaciones sobre su eficiencia. Este trabajo fue desarrollado con el objetivo de comparar la eficiencia del sistema de protección contra incendios forestales en la Fazenda Monte Alegre, estado del Paraná, sur de Brasil y en las Empresas Forestales de la Provincia Pinar del Río, Cuba. Los datos utilizados se refieren al período 01/01/2001 - 31/12/2010. Para evaluar la eficiencia fueron utilizados indicadores tales como: densidad de incendios, densidad de área quemada, áreas quemadas medias por incendios, porcentaje del área forestal quemada y tamaño de los incendios. Los indicadores fueron estimados considerando la distribución temporal y espacial de los incendios. De forma general los valores medios obtenidos para los indicadores muestran mejor eficiencia en Monte Alegre. En ambas regiones la eficiencia fue menor durante los meses correspondientes a la época de incendios. En Monte Alegre la eficiencia fue similar en bosques naturales y en plantaciones, mientras que en Pinar del Río es menor en los bosques naturales. La eficiencia obtenida para el sistema de protección contra incendios tanto en Monte Alegre como en Pinar del Río, es menor en el grupo de especies de los Pinus spp.Palabras-clave: Prevención; combate; densidad de incendios; densidad de área quemada; clases de tamaño. AbstractForest fire protection efficiency in Monte Alegre, Brazil and Pinar del Río, Cuba. It’s important to have information about the efficiency of the forest fire protection system to take decisions that will improve the protection against wildfires. The objective of this work was to compare the efficiency of the forest fire protection system in the Monte Alegre Forest District, State of Parana, south of Brazil and the Forest Companies of Pinar del Río Province, Cuba. A ten year period (01/01/2001 to 31/12/2010) was considered. For the efficiency evaluation, we used the following indicators: forest fires density, burned area density, burned area average by fire, burned surface percentage, and fire size class. These indicators have been considered observing temporary and spatial distribution of forest fire. After analyzing all the indicators, results revealed a higher efficiency regarding fire control in the Monte Alegre fire protection system. In both regions, the efficiency was lower in the fire season. In Monte Alegre, the efficiency was similar in natural forests and plantations. However, in Pinar del Río, the efficiency was lower in natural forests. The efficiency of forest fire protection system in Monte Alegre and Pinar del Río was lower in the Pinus spp plantations.Keywords: Forest fires; prevention; suppression; fire size; forest protection.
ESTUDO DE TEMPO E MOVIMENTO NA ETAPA DE SELEÇÃO DE MUDAS EM UM VIVEIRO FLORESTAL
Authors: Gonçalves Juliana De Lima , Nakajima Nelson Yoshihiro , Isbaex Crismeire , Guimarães Pompeu Paes , Hosokawa Roberto Tuyoshi , Quartucci Felipe 
Published: January 2015

O objetivo deste artigo foi analisar a viabilidade da melhoria das condições de trabalho em um viveiro florestal adotando um ambiente protegido. A pesquisa focaliza o processo de seleção de mudas pelo estudo de tempo e movimento. Uma análise de viabilidade econômica utilizando os indicadores VPL e TIR foi realizada, levando em conta os tempos perdidos no processo e o custo de implantação de um galpão de seleção. O estudo de tempo mostrou que se essas atividades forem realizadas em um ambiente coberto, protegido e adequado, sem interferência de intempéries, proporcionará melhoria das condições de trabalho e aperfeiçoará o rendimento da produção. A análise de viabilidade econômica mostrou que, com base nos ganhos de rendimento calculados, o investimento total na construção do galpão é totalmente viável e o retorno financeiro do investimento acontecerá em dois anos, com um VPL de R$ 119.150,27, uma TIR de 14,5% e uma taxa de 8% ao ano. A construção do galpão possibilitará um ambiente de trabalho mais confortável para o trabalhador, economizando tempo das seleções de mudas e redução de custos da produção.Palavra-chave: Melhoria ergonômica; análise econômica; processo produtivo. AbstractTime and movement study in forest nursery. The objective of this research was to analyze the improvement of work conditions in a forest nursery by adopting a protected environment. The research focuses on the process of seedlings selections by the study of time and movement. It performed an economic viability assessment utilizing the indicators NPV and IRR, and considering the downtime in the process and costs of implementing a selection warehouse. The time and movement study showed that, if these activities were performed in a covered, protected and appropriate environment, without direct interference of weather, they will provide improvement of work conditions and optimize income productivity. The economic viability assessment showed that, based on calculated income gains, the overall investment used in the construction of a warehouse is fully viable and the financial return on the investment will happen in two years, with a NPV of R$ 119,150.27, an IRR of 14.5%, using a 8% discount rate. The warehouse construction will enable a more comfortable work environment for the worker, saving time of seedling selections and reduction in production costs.Keywords: Ergonomic improvement; economic analysis; production process.
Holocalyx balansae: ASPECTOS FENOLÓGICOS, MORFOLÓGICOS E GERMINAÇÃO DE SEMENTES
Authors: Felippi Marciele , Longhi Solon Jonas , Araújo Maristela Machado 
Published: January 2015

O reduzido conhecimento sobre aspectos básicos relacionados à autoecologia de espécies florestais nativas inviabiliza a elaboração de estratégias para o manejo adequado de florestas, restauração e produção de mudas. Assim, o estudo teve como objetivo caracterizar a época de floração e frutificação, morfologia da flor, fruto, semente, plântula e muda de Holocalyx balansae Micheli (alecrim), além de analisar características físicas e fisiológicas de um lote de sementes. As observações fenológicas foram realizadas mensalmente. O lote de sementes foi formado a partir de seis indivíduos que apresentaram frutos maduros no mesmo período. A presença de flores ocorreu em dois períodos (fevereiro e junho a setembro), da mesma forma que os frutos maduros (novembro e de março a abril). Observaram-se variações fenológicas, conforme o ano e entre árvores no mesmo período, sugerindo a marcação de maior número de exemplares arbóreos marcados do que se deseja coletar. A germinação é hipógea. O tamanho dos frutos e sementes foi variável, resultando em 793 sementes por quilograma, com 83% de germinação, entretanto, sob condições ambientais, ao observar a emergência das plântulas, esse valor decresceu expressivamente (51%), devendo este ser um fator considerado no planejamento de produção de mudas.Palavras-chave: Papilionoideae; floração; frutificação; emergência; muda. AbstractHolocalyx balansae: phenological and morphological aspects, and seed germination. The lack of knowledge about basic aspects related to autoecology of native forest species prevents the development of strategies for appropriate forest management, restoration and production of seedlings. This research aimed to characterize the time of flowering and fruitification, the morphology of flowers, fruits, seeds, seedling and changes of Holocalyx balansae Micheli (rosemary), and analyzing physical and physiological characteristics of a seed lot. We conducted monthly phenological observations. The seed lot had six individuals that exhibited ripe fruits in the same period. The presence of flowers occurred in two periods (February and June to September), just as the ripe fruit (November and March to April). We observed phenological changes during the year between trees in the same period, suggesting that it is necessary to mark a largest number of arboreal specimens than the ones you want to collect. Germination is hypogeal. The size of the fruits and seeds was variable, resulting in 793 seeds per kilogram, with 83% of germination, however, under environment conditions, observing seedling emergence, this value decreased significantly (51%), it should be a factor to be considered in seedling production planning.Keywords: Papilionoideae; flowering; fruiting; emergency; seedling.
FENOLOGIA DE Ocotea pulchella, Myrcia brasiliensis E Psidium cattleyanum, EM FLORESTA SEMIDECÍDUA DO SUL DO BRASIL
Authors: Bauer Danielle , Müller Andressa , Goetz Milena Nunes Bernardes , Schmitt Jairo Lizandro 
Published: January 2015

Eventos vegetativos e reprodutivos de Ocotea pulchella (Nees) Mez (Lauraceae), Myrcia brasiliensis Kiaersk e Psidium cattleyanum Sabine (Myrtaceae) foram avaliados, em fragmento de floresta semidecidual secundária durante dois anos. Foi realizada uma análise estatística circular e as fenofases foram correlacionadas à temperatura, comprimento do dia e precipitação. A queda foliar e brotamento das espécies ocorreram continuamente durante o biênio caracterizando fraca sazonalidade. A floração, incluindo o surgimento de botões florais e antese, caracterizou um padrão sazonal nas três espécies. Myrcia brasiliensis e Psidium cattleyanum apresentaram grande concentração de indivíduos em torno da data média (r) para a fenofase frutos imaturos, enquanto que, em O. pulchella, a produção foi praticamente constante (r baixo). O surgimento dos frutos em P. cattleyanum e O. pulchella demonstrou relação com comprimento do dia e temperatura, nos dois anos. Todas as espécies apresentaram alta concentração de indivíduos com frutos maduros, em alguma época do ano, permitindo estimativa da data média desse evento reprodutivo e indicando sazonalidade no amadurecimento. As três espécies potencialmente podem oferecer recursos alimentares aos animais locais, principalmente as aves, porque os frutos maduros ficaram disponíveis ao longo do período inteiro.Palavras-chave: Fenofases; espécies arbóreas; floresta atlântica; Lauraceae; Myrtaceae. AbstractPhenology of Ocotea pulchella, Myrcia brasiliensis and Psidium cattleyanum in semideciduous forest in southern Brazil. We evaluated vegetative and reproductive events of Ocotea pulchella (Nees) Mez (Lauraceae), Myrcia brasiliensis Kiaersk and Psidium cattleyanum Sabine (Myrtaceae) in a secondary semideciduous forest fragment for two years. We performed a circular data analysis and we correlated phenophases to temperature, daylenght and rainfall. Leaf fall and leaf appearance occurred continuously during the biennium featuring a low seasonality. The flowering, including the emergence of floral buds and anthesis, featured a seasonal pattern. Myrcia brasiliensis and Psidium cattleyanum showed great concentration of immature fruits around the average date (r), while fruit production of O. pulchella was almost constant (low r). The appearance of the fruits in P. cattleyanum and O. pulchella revealed a connection between daylenght and temperature in both years. All species had high concentration of individuals with mature fruits at some time of the year, allowing estimation of the average date of the reproductive event and indicating seasonality of maturation. The three species may potentially provide food resources for local animals, mainly birds, because mature fruits were available throughout the entire period.Keywords: Phenophases; tree species; atlantic rain forest; Lauraceae; Myrtaceae.
TOLERÂNCIA DE PLANTAS DE Khaya ivorensis E Toona ciliata A HERBICIDAS
Authors: Brighenti Alexandre Magno , Muller Marcelo Dias 
Published: January 2015

Dois experimentos foram conduzidos com o objetivo de avaliar a tolerância de plantas mogno-africano (Khaya ivorensis) e cedro-australiano (Toona ciliata var. australis) a herbicidas. O delineamento experimental foi inteiramente casualizado, com quatro repetições. Tratamentos: i) testemunha sem aplicação, ii) imazapyr (25 g i.a. ha-1), iii) oxyfluorfen (360 g i.a. ha-1), iv) oxyfluorfen (720 g i.a. ha-1), v) isoxaflutole (75 g i.a. ha-1), vi) isoxaflutole (112,5 g i.a. ha-1), vii) chlorimuron-ethyl (7,5 g i.a. ha-1) + 0,05% v/v de óleo mineral, viii) chlorimuron-ethyl (12,5 g i.a. ha-1) + 0,05% v/v de óleo mineral, ix) imazethapyr (100 g i.a. ha-1) e x) nicosulfuron (40 g i.a. ha-1). Para o mogno africano, os herbicidas imazapyr (25 g i.a. ha-1), oxyfluorfen (360 g i.a. ha-1) e chlorimuron-ethyl (7,5 e 12,5 g i.a. ha-1) proporcionaram sintomas leves de fitotoxicidade. O oxyfluorfen (720 g i.a. ha-1), o imazethapyr e o nicosulfuron foram moderadamente fitotóxicos e o isoxaflutole (75 e 112,5 g i.a. ha-1) foi o herbicida mais fitotóxico. Para o cedro australiano, o herbicida imazapyr (25 g i.a. ha-1) proporcionou os menores níveis de injúria. O oxyfluorfen, o isoxaflutole, o chlorimuron-ethyl, o imazethapyr e o nicosulfuron proporcionaram altos níveis de fitotoxicidade.Palavras-chave: Mogno africano; cedro australiano; plantas daninhas; seletividade. AbstractTolerance of Khaya ivorensis and Toona ciliata to herbicides. We conducted two experiments to evaluate the plant tolerance of African mahogany (Khaya ivorensis) and Australian cedar (Toona ciliata var. australis) to herbicides. The experimental arrangement was a completely randomized design, with four replications. The treatments were as follows: i) untreated control, ii) imazapyr (25 g ai ha-1), iii) oxyfluorfen (360 g ai ha-1), iv) oxyfluorfen (720 g ai ha-1), v) isoxaflutole (75g ai ha-1), vi) isoxaflutole (112.5 g ai ha-1), vii) chlorimuron-ethyl (7.5 g ai ha-1) + 0.05% v / v mineral oil, viii) chlorimuron-ethyl (12.5 g ai ha-1) + 0.05% v / v mineral oil, ix) imazethapyr (100 g ai ha-1), and x) nicosulfuron (40 g ai ha-1). For the African mahogany, imazapyr (25 g ai ha-1), oxyfluorfen (360 g ai ha-1) and chlorimuron-ethyl (7.5 and 12.5 g ai ha-1), showed mild symptoms of phytotoxicity. The oxyfluorfen (720 g ai ha-1), imazethapyr and nicosulfuron were moderately phytotoxics, and isoxaflutole (75 and 112.5 g ai ha-1) was the most phytotoxic herbicide. For Australian cedar, imazapyr (25 g ai ha-1) caused low levels of injury. Oxyfluorfen, isoxaflutole, chlorimuron-ethyl, imazethapyr and nicosulfuron were the most phytotoxic herbicides. Keywords: African mahogany; Australian cedar; weeds; selectivity.
EFEITO DE TELAS DE SOMBREAMENTO NO CRESCIMENTO E PROTEÇÃO DE MUDAS DE Toona ciliata SOB BAIXAS TEMPERATURAS
Authors: De Marco Rudinei , Conte Bruno , Perrando Edison Rogério , De Oliveira Fortes Fabiano , Somavilla Lucindo , Boff Burgin Mário 
Published: January 2015

O objetivo deste trabalho foi avaliar a influência de diferentes camadas de telas de sombreamento no crescimento e na proteção de mudas de Toona ciliata em períodos de suscetibilidade a geadas. O estudo foi conduzido na Universidade Federal de Santa Maria, Campus Frederico Westphalen, RS. Para a realização do experimento, mudas de Toona ciliata foram mantidas em sacos plásticos com capacidade de três litros e submetidas a quatro tratamentos: mudas sem proteção e mudas sob proteção com camada simples, dupla e tripla de sombreamento. O delineamento foi o inteiramente casualizado, com quatro repetições de oito mudas por repetição. Foi avaliado o número de mudas com folhas apicais necrosadas, a altura da parte aérea, o diâmetro do colo e a massa seca radicular, aérea e total. Por meio dessas variáveis, foi possível determinar o Índice de Produtividade, o Índice de Qualidade de Dickson e as relações altura/diâmetro e altura/massa seca da parte aérea. A utilização de telas de sombreamento mostrou-se eficiente para a proteção das mudas contra o efeito adverso da geada. O uso de uma camada simples de sombreamento resultou em maior proteção e consequentemente forneceu as melhores características dendrométricas em relação às demais intensidades de sombreamento.Palavras-chave: Tela de proteção; tolerância à geada; cedro australiano. AbstractEffect of shading screens on growth and protection of Toona ciliata seedlings under low temperatures. This research aimed to evaluate the influence of different shading screens layers on the growth and protection of Toona ciliata seedlings in periods of frost susceptibility. The research was conducted on the Santa Maria Federal University, Frederico Westphalen Campus, RS. For the experiment, Toona ciliata seedlings maintained in plastic bags with three liters of capacity each were submitted to four treatments: unprotected seedlings, seedlings under protection with a single shading layer, double and triple. The experimental design was the completely randomized, with four repetitions of eight seedlings each. It was evaluated the number of seedlings with necrosed apical leaves, the aerial part height, the lap diameter and the dry mass of root, aerial and total. By such variables, it was possible to determine the Produtivity Index, the Dickson Quality Index and the relations height/diameter and height/dry mass of aerial part. The use of shading screens showed up efficient to protect the seedlings against the adverse effect of frost. The use of a single layer of shading resulted in a greater protection and consequently provided the best dendrometric characteristics, compared to the others levels of shading.Keywords: Screen protection; tolerance to frost; Australian cedar.