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用于起爆系统的无机炸药——配位络合物(英文)

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含能材料 2004年第1期12卷 15-19页

作者：依留申MA 泽林斯基iv 俄罗斯圣彼德堡国立工艺学院

介绍了含多氮杂环配位体的过氯酸盐系列络合物的合成研究。主要对新合成的化合物进行了性能研究及在安全电雷管和激光雷管的应用研究。

关键词：起爆系统无机炸药配位络合物激光

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A new Early Cretaceous dinosaur track assemblage and the first definite non-avian theropod swim trackway from China

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Chinese Science Bulletin 2013年第19期58卷 2370-2378页

作者： XING LiDa LOCKLEY Martin G ZHANG JianPing MILNER Andrew R C KLEIN Hendrik LI DaQing PERSONS iv W Scott EBI JieFang School of the Earth Sciences and Resources China University of Geosciences Department of Biological Sciences University of Alberta 11455 Saskatchewan DriveEdmontonAlberta T6G 2E9Canada Dinosaur Tracks Museum University of Colorado Denver St. George Dinosaur Discovery Site at Johnson Farm 2180 East Riverside DriveUtah 84790USA Saurierwelt Pal ontologisches Museum Alte Richt 7D-92318 NeumarktGermany Geological Museum of Gansu Zhaojue County Bureau of Culture MultimediaPress & Sport Tourism

The trackway of a swimming theropod (ichnogenus Characichnos) is reported from the Lower Cretaceous Feitianshan Formation of Sichuan, China. These swim tracks help confirm that non-avian theropods were capable of forging moderately deep bodies of water. The trackway occurs on the same surface as a typical walking trackway of a sauropod (ichnogenus Brontopodus). Both occurrences are the first reported from the Cretaceous of Sichuan, and the swim tracks are the first well-preserved example of a Characichnos trackway from China. Additionally, a theropod walking trackway and several ornithopod walking trackways (similar to the ichnogenus Caririchnium) occur in the same horizon. The ornithopod trackways show a parallel orientation, suggesting gregarious behavior of the trackmakers, which may have been iguanodontiforms and/or hadrosauriforms. The co-occurrence of theropod swim tracks and theropod walking tracks suggests a fluctuation of water depth within a distinct time span.

关键词：蜥脚类恐龙早白垩世兽脚类游泳中国轨道鸟类组合和

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Seroprevalence of viral and bacterial pathogens among malaria patients in an endemic area of southern Venezuela

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Infectious Diseases of Poverty 2023年第2期12卷 130-131页

作者： David A.Forero-Peña Fhabián S.Carrión-Nessi Mary Lopez-Perez Marisol Sandoval-de Mora iván D.Amaya Ángel F.Gamardo Melynar Chavero Luisamy Figuera María V.Marcano Natasha A.Camejo-Ávila Mariana Hidalgo Cariagne J.Arenas Myriam Arévalo-Herrera Sócrates Herrera Biomedical Research and Therapeutic Vaccines Institute Ciudad Bolivar Venezuela Internal Medicine Department “Ruiz y Páez” University Hospital Complex Ciudad Bolivar Venezuela “Dr. Francisco Battistini Casalta” Health Sciences School University of Oriente – Bolivar Nucleus Ciudad Bolivar Venezuela Department of Immunology and Microbiology Faculty of Health and Medical Sciences Centre for Medical Parasitology University of Copenhagen Copenhagen Denmark Immunoparasitology Laboratory Microbiology and Cell Biology Centre Venezuelan Institute for Scientific Research Miranda Venezuela Caucaseco Scientific Research Centre Cali Colombia

Background Malaria remains a leading public health problem ***-infections with other pathogens complicate its diagnosis and may modify the disease’s clinical course and *** in malaria clinical presentation with other infections and overlapping endemicity result in underdiagnosis of co-infections and increased ***,the aim of this study was to determine the seroprevalence of viral and bacterial pathogens among diagnosed malaria patients in malaria-endemic areas in *** A cross-sectional study was conducted on malaria patients attending three reference medical centres in Ciudad Bolivar,*** evaluation and laboratory tests for dengue virus(DENV),chikungunya virus(CHIKV),viral hepatitis[hepatitis A virus(HAV),hepatitis B virus(HBV),and hepatitis C virus(HCV)],and leptospirosis(LEP)were performed by enzyme-linked immunosorbent *** exposure to these pathogens was defined by the presence of specific immunoglobulin(Ig)G,and co-infection or recent exposure(CoRE)was determined by the presence of specific IgM alone or IgM+*** analysis considered descriptive *** distribution was statistically evaluated using Kolmogorov–Smirnov test and the necessary comparison *** ratio(OR)for complications was determined according to CoRE presence with a 95%confidence interval(CI).Results A total of 161 malaria patients were studied,66%infected with Plasmodium vivax,27%with ***,and 7.5%harboured ***/*** mixed *** exposure to DENV(60%)and CHIKV(25%)was *** was confirmed in 55 of the 161 malaria patients(34%)and were more frequent in ***(49%)than in ***(29%)and mixed malaria patients(25%)(OR=2.43,95%CI:1.39–4.25,P=0.018).The most frequent CoRE was DENV(15%),followed by HAV(12%),HBV(6.2%),CHIKV(5.5%),and LEP(3.7%);HCV CoRE was *** malaria was significantly more frequent in patients with CoRE(56%)than those without CoR

关键词： Malaria Seroprevalence Co-infection Chikungunya Dengue Hepatitis Venezuela

Development of a Low Cost Pulsed Laser Deposition System for Thin Films Growth

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Modern Instrumentation 2012年第4期1卷 41-48页

作者： Marcos iván Oliva Carlos iván Zandalazini Juan Carlos Ferrero Hector Raúl Bertorello Centro Láser de Ciencias Moleculare Departamento de Fisicoquímica Facultad de Ciencias Químicas Universidad Nacional de Córdoba Ciudad Universitaria Córdoba Argentina Grupo de Ciencia de Materiales Facultad de Matemática Astronomía y Física Universidad Nacional de Córdoba Ciudad Universitaria Córdoba Argentina Instituto de Física Enrique Gaviola Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Córdoba Argentina

.Pulsed Laser Deposition (PLD) is a powerful technique to grow thin films. Oxides, Magnetics and superconducting materials have been obtained by PLD and theirs properties are strongly dependent of deposition parameters. The construction of a simple and cheap PLD system that is suitable for growing various thin films, including magnetic materials, controlling some deposition parameters is presented. The design characteristics and construction are presented for each one of the devices that compose this PLD system. The equipment has the possibility of carrying out films deposition using up to five targets under controlled atmosphere and substrate temperature. The system also allows controlling the cool off sample time after growing up films at high temperatures. A wide range of relative speeds between target and substrate axial rotation can be externally controlled. With the configuration and the dimensions adopted in their construction, a PLD system of great experimental flexibility is achieved, at a very low cost regarding the commercial systems. To evaluate their performance and effectiveness, the deposition characteristics of a BaFe12O19 film on (0001) sapphire substrate is presented.

关键词： Pulsed Laser Deposition Thin Film Multilayer

Evaluating methods to quantify sediment volumes trapped behind check dams,Saldana badlands(Spain)

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International Journal of Sediment Research 2017年第1期32卷 1-11页

作者： iván Ramos-Diez Joaquín Navarro-Hevia Roberto San Martín Fernández Virginia Díaz-Gutiérrez Jorge Mongil-Manso Department of Agricultural and Forestry Engineering University of Valladolid Sustainable Forest Management Research Institute Department of Statistics and Operations Research.University of Valladolid Hydrology and Conservation Research Group.Catholic University of vila

The determination of sediment yield in catchments based on the sediment trapped by check dams is becoming a subject of *** fact,several methods have been developed in recent years to estimate the sediment retained by check *** complexity,precision and accuracy of each method vary *** this study,we evaluate the sediment trapped by check dams comparing the Sections method respect to the Prism,Pyramid,DTMs and Trapezoid *** analyzed a sample of 25 check dams(α-1=90%;ε=10%) in the Saldana badlands(Spain).The results showed that the Sections method offered a volume of retained sediment between the others,which gave an absolute variation from 22%to40%.The high variability of the check dam and sediment wedge sizes made necessary to compare methods in groups combining both *** significant differences in sediment volumes could be found between the methods for very small(height(h):1.8-2.3 m;trapped volume(V):6-102 m3) or large check dams(h > 2.3 m;V:165-387 m3),while significant differences are found for small(h < 1.5 m;V:1-229 m3) or middle-sized check dams(h:2.2-3.2 m;V:65-235 m3).Nevertheless,volume differences between groups ranged up to + 25%.For these reason,the size of the check dam,the shape of the sediment wedge and the accuracy of the measure methods must considered when selecting an appropriate method to obtain the volume of retained sediment by check dams.A correct estimation of the sediment retention is needed to evaluate the role and efficiency of check dams in restoration projects or to estimate sediment yields.

关键词： Erosion Gullies Check dam construction Sediment retention Erosion models Topographic survey

Understanding the Urban Sprawl in the Mid-Size Latin American Cities through the Urban Form:Analysis of the Concepcion Metropolitan Area(Chile)

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Journal of Geographic Information System 2013年第3期5卷 222-234页

作者： Carolina Rojas iván Muniz Joan Pino Department of Geography Faculty of ArchitectureUrbanism and GeographyUniversity of ConcepcionCenter for Sustanaible Urban Development—ChileConcepcionChile Department of Applied Economics Autonomous University of BarcelonaBarcelonaSpain CREAF(Center for Ecological Research and Forestry Applications) Autonomous University of BarcelonaBarcelonaSpain

Latin American cities, like those from North America and Europe, experience problems of urban sprawl. However, few studies have dedicated exclusively to this phenomenon in specific cities, and this omission is particularly noticeable regarding cities not considered among the megalopolis of the continent. The present work analyzes urban sprawl through an urban form in the Concepción Metropolitan Area, Chile, between 1990 and 2009, considering local aspects that may have played a role in the process. The main empirical results obtained from this study reveal a metropolitan area that has expanded intensely over a 20-year period, growing from 9000 hectares to more than 17,000 ha for a 96% increment in the built-up area. The new urban surfaces consolidate a central conurbation that strengthens the role of the main downtowns, with less-intense occupation towards the sub-centers but in a structure that follows the transportation infrastructure. Over the last 20 years, the distance between the shapes has grown progressively by around 2 km, increasing the size of the ellipse by more than 1000 km2. In particular the complexity of the urbanized surfaces has grown, becoming more irregular in shape and less compact as they come to occupy larger areas. So our principal findings include: an increment of nearly 100% in the urban surface, the importance of a polycentric urban structure in the process of consolidation as a support for analyzing different spatial dynamics, and the growing morphological irregularity of the territory of the sprawl.

关键词： Urban Sprawl Latin American Cities Metropolitan Areas Geographical Information System

Bilinear Model Proposal for Seismic Analysis Using Triple Friction Pendulum (TFP) Bearings

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Open Journal of Civil Engineering 2017年第1期7卷 14-31页

作者： iván Delgado Roberto Aguiar Pablo Caiza Departamento de Ciencias de la Tierra y la Construcción Universidad de Fuerzas Amadas ESPE Av. Gral. Rumiñ ahui s/n Quito Ecuador

An analytical model is presented for seismic analysis of triple friction pendulum bearings and validated using 81 bearing tests, each subjected to three cycles, with a duration of 12 seconds and using 250, 200 and 100 tons vertical loads. The main objective is to develop formulas for bilinear behavior using maximum, average and minimum friction coefficients to check which is the closest to the real behavior in the laboratory tests and comparatives curves plotting to observe the standard derivation. Parameters such as friction coefficients, effective stiffness, damping factor and vibration periods are analyzed to understand the structural behavior of the TPF bearings.

关键词： Triple Friction Pendulum Bearings

Variations in the Patterns of Precipitation in the Watershed of the Ambato River Associated with the Eruptive Process of the Tungurahua Volcano in Ecuador

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Open Journal of Modern Hydrology 2015年第4期5卷 121-139页

作者： iván Ríos García Abel Solera Universidad Nacional de Chimborazo Riobamba Ecuador Universidad Nacional de Chimborazo Riobamba Ecuador

The Tungurahua, located in the Cordillera de los Andes, is the volcano with the most eruptive activity in Ecuador nowadays. 1993 records the eruptive initial process and in August of 1999, after almost 80 years of rest, the volcano begins an explosive eruptive period. This research examines the effects of the eruptive process of the volcano in the patterns of change in precipitation in the short term in a hydrographic watershed. Their results are intended to contribute to the studies carried out to understand the weather and the factors influencing its variability at local and global level. It aims also to contribute with technical data in the debate about experimenting with artificial volcanoes to weather modification. The analysis demonstrates a process of redistribution of rainfall, with significant increases in rainfall from 42.25% on December, and significant decreases of 40.03% on September, during the presence of the eruptive process.

关键词： Volcanic Eruption Rainfall Variability Tungurahua

The new ichnotaxon Eubrontes nobitai ichnosp. nov. and other saurischian tracks from the Lower Cretaceous of Sichuan Province and a review of Chinese Eubrontes-type tracks

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Journal of Palaeogeography 2021年第3期10卷 302-320页

作者： Li-Da Xing Martin G.Lockley Hendrik Klein Li-Jun Zhang Anthony Romilio W.Scott Persons iv Guang-Zhao Peng Yong Ye Miao-Yan Wang State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China School of the Earth Sciences and Resources China University of GeosciencesBeijing 100083China Dinosaur Trackers Research Group University of ColoradoDenver 80217USA Saurierwelt Paläontologisches Museum Alte Richt 7 D-92318 NeumarktGermany Institute of Resources and Environment Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan ProvinceCollaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic RegionHenan Polytechnic UniversityJiaozuo 454003Henan ProvinceChina School of Biological Sciences The University of QueenslandBrisbaneQueensland 4072Australia Mace Brown Museum of Natural History Department of Geology and Environmental GeosciencesCollege of CharlestonCharleston 29401USA Zigong Dinosaur Museum Zigong 643013Sichuan ProvinceChina

The Jiaguan Formation and the underlying Feitianshan Formation(Lower Cretaceous) in Sichuan Province yield multiple saurischian(theropod–sauropod) dominated ichnofaunas. To date, a moderate diversity of six theropod ichnogenera has been reported, but none of these have been identified at the ichnospecies level. Thus, many morphotypes have common "generic" labels such as Grallator, Eubrontes, cf. Eubrontes or even "EubrontesMegalosauripus" morphotype. These morphotypes are generally more typical of the Jurassic, whereas other more distinctive theropod tracks(Minisauripus and Velociraptorichnus) are restricted to the Cretaceous. The new ichnospecies Eubrontes nobitai ichnosp nov. is distinguished from Jurassic morphotypes based on a very wellpreserved trackway and represents the first-named Eubrontes ichnospecies from the Cretaceous of Asia.

关键词： Ichnofossils Dinosaur footprints Theropod Myths

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