Climatic changes reflected in laminated Santa Barbara Basin sediments

Dating of annually varved sediments of Santa Barbara Basin down to AD 1650 in absence of precise radiometric methods was achieved by (1) counting varves and determining mean annual sedimentation rates from x-radiographs, and (2) correlation with historical rainfall and tree-ring records.

Coastal climate reflected in carbon-13/carbon-12 ratio of organic carbon in varved sediment from Santa Barbara basin

A 1844-1987 time-series of carbon stable isotope ratios from dated sedimentary total organic carbon from the center of the Santa Barbara basin is compared with historical climate and oceanographic records. Carbon derived from carbon-13-depleted phytoplankton and carbon-13-enriched kelp appear responsible for a large part of the isotopic variance in sedimentary total organic carbon. El Niño/Southern Oscillation events are recorded by the isotopic response of marine organic carbon in sediments.

Seasonal resolution of laminated sediments in Santa Barbara Basin: its significance in paleoclimatic studies

Sediments in Santa Barbara Basin contain microfossil and sedimentological information that allows reconstruction of major features of the California Current such as water temperature, strength of upwelling, and productivity. ... Until now, investigations of Santa Barbara Basin sediments have utilized analytical techniques that could not resolve seasonal laminae, permitting annual resolution of variations in sediment composition and structure only. ... Based on a successful technique for preparation of epoxy-embedded and highly polished thin-sections that permit economical optical and electron microscope evaluation of laminated sequences, it is our long-term goal to reconstruct, with unprecedented detail, the history of sedimentation processes in the Santa Barbara Basin by developing ultra-high-resolution time series of biotic and detrital proxies.

Sea surface temperature and paleo-El Niño events in Santa Barbara Basin, AD 1841-1941

Like pages of a "natural coastal diary", successive layers of anoxic varved sediment in the central Santa Barbara Basin have been used by paleoceanographers to reconstruct aspects of past coastal climate. This report focuses on the end of the "Little Ice Age" (15th to 19th century) and on the beginning of this century, a period known to encompass extreme climate excursions and weather events in the Santa Barbara Basin and other parts of Southern California. El Niño events are known to disrupt Southern California's coastal ecosystems and to cause anomalous weather conditions, but El Niño events in Southern California before 1990 have been largely undocumented.

Radiolarian flux in the Santa Barbara Basin as an index of climate variability

Annual radiolarian flux (1954-1986) extrapolated from varved Santa Barbara Basin sediments was compared to instrumental data to examine the effect of interannual climate variability. Paleo-reconstructions over large geographic areas or 10^3 years and longer typically rely on changes in species composition to signal environment or climate shifts. In the relatively short period studied, climate fluctuations were insufficient to significantly alter the assemblage, but there was considerable variability in the total flux of radiolarians. This variability, greatest on 5- to 25-year time scales, appears to be linked to regional climate variability. Total flux correlates to regional California sea surface temperature and the composite of sea level pressure over the Northern Hemisphere for years of high radiolarian flux resembles positive PNA circulation.

Molecular orientation of copper phthalocyanine derivative ins copper phthalocyanine-Fe2O3 nanoparticles alternating LB films

Copper phthalocyanine-Fe2O3 nanoparticles alternating thin films were fabricated by Langmuir-Blodgett technique. Molecular orientation of [4-(4'-benzyloxy phenyl sulfonyl)phenoxy]-tris-4-(2,4-di-t-phenoxy) phthalocyanine copper (II) in its alternating LB films, deposited at different conditions,was studied by polarized UV-Vis spectra. The tilt extent of the copper phthalocyanine molecule omits LB films increases with the surface pressure of the subphase increasing on the same subphase, or with Fe2O3 concentration decreasing at the same pressure. The orientation of the copper phthalocyanine derivative is important for the gas-sensing properties. The bigger the tilt extent of the phthalocyanine molecule is, the greater the sensitivity of the film is.

便携式移动机器人INS/GPS组合导航系统研究

基于捷联惯导系统（INS）与全球定位系统（GPS）定位技术的发展以及机器人导航的需要，本文对INS与GPS的组合导航系统进行了研究。捷联惯导系统与GPS导航各有优缺点，具有互补性，文中将两者结合形成了更加准确可靠的定位系统。本文首先介绍了捷联惯导系统和全球定位系统，并对捷联惯导和GPS的误差作了详细的分析，建立了误差模型。文中应用动力学误差方程建立了九状态INS/GPS综合卡尔曼滤波方程。提出了一种以位置、速度、姿态DCM的误差为状态量，以GPS和INS的位置差作为观测量的INS/GPS组合导航系统的滤波算法，并将该技术应用于机器人的定位导航。仿真实验表明，该算法可有效提高系统导航参数的估计精度。本文分五章对该课题进行了研究。第一章是引言，介绍了课题的研究背景、意义，国内外的研究现状和本文的主要工作；第二章介绍了惯性传感器和GPS接收器的原理和特性；第三章介绍了捷联惯导系统相关的理论知识，包括姿态角的解算，算法具体内容和误差分析，并对捷联惯导系统进行了仿真试验；第四章介绍了Kalman滤波的相关知识并详细介绍了INS/GPS组合导航系统；第五章对INS/GPS组合导航系统的九状态卡尔曼滤波算法进行了仿真，并对试验结果进行了详细的分析。从仿真结果可知，组合导航系统大大的提高了系统的精度，克服了纯惯导系统的缺点。

Produção do primeiro corte de pupunheira (Bactris gasipaes) para palmito plantada sob diferentes níveis de adubação no litoral de Santa Catarina.

2009

Rentabilidade econômica do cultivo da pupunheira (Bactris gasipaes Kunth), destinada à produção de palmito no Litoral de Santa Catarina.

2010

Métodos alternativos para o controle de ervas daninhas no cultivo da pupunheira para palmito no Estado de Santa Catarina.

2010

BOSQUE modelo de Caçador: uma proposta inovadora para a região da Floresta de Araucária em Santa Catarina.

2010

Análise de investimentos em suínos, aves e florestas no estado de Santa Catarina.

2005

Evolução nas características medidas em teste de desempenho de machos de pedigree no estado de Santa Catarina.

1984

Transação entre suinocultor e agroindústria em Santa Catarina.

2006

Estrutura dos contratos de integração na suinocultura de Santa Catarina.

2006