Soybean Aphid Threshold

Soybean aphid has been a major pest for producers in Northwest Iowa since their first major outbreak in 2003. Control measures for managing this pest are warranted almost every growing season and much research is being done on managing this pest. Insecticide applications have been the sole management technique for soybean aphid and will continue to be important in the future. An economic threshold of 250 aphids/plant is the current threshold level recommended by Iowa State University. This study was conducted to determine if the current recommendations are useful in managing soybean aphid and maintaining profitability for producers.

El debate historiográfico sobre las causas de la Primera Guerra Mundial

Esta investigación indaga la variada interpretación del origen del conflicto por parte de una nutrida selección de historiadores. La discrepancia esencial se ha enfocado en lo siguiente: ¿Tuvieron influencia las vastas fuerzas históricas, es decir, los condicionamientos externos e internos de larga duración? Si es así ¿algunos fueron más relevantes que otros? ¿Contaron, por el contrario, solamente las coyunturas inmediatas y las acciones de los dirigentes? ¿O bien el conflicto armado fue el resultado de una amalgama, aunque diferenciada, de causas profundas y decisiones particulares desencadenadas durante la crisis de julio? Específicas categorías conceptuales y el enfoque analítico-comparativo han permitido adjudicar con mayor precisión el peso de los distintos factores en juego.

Alberto Magno y Buenaventura sobre la eternidad del mundo : aproximaciones y divergencias

La tesis aristotélica acerca de la eternidad del mundo y su prolongación averroísta incide en el pensamiento escolástico con anterioridad al estallido del conflicto en la Universidad de París. Ambos maestros de teología, el dominico y el franciscano, toman partido por la tesis contraria; en el caso de Alberto Magno hay una inclinación hacia la imposibilidad de presentar desde la filosofía argumentos que sostengan su posición, como así también argumentos que avalen la posición contraria. La razón aducida por Alberto es que no se trata de un tema propio de la física, sino perteneciente al orden sobrenatural. Buenaventura en cambio propone una serie de argumentos que desarrolla a partir de los mismos términos empleados por Aristóteles para fundamentar su tesis, pero indicando las contradicciones que surgen de los mismos. El presente trabajo confronta las diversas posiciones de ambos maestros sobre el tema, analizando aproximaciones y divergencias en función de la base común ejemplarista, para arribar a una posible solución en el marco de la teoría de los trascendentales.

Fiesta en Noviembre de Eduardo Mallea : la experimentación formal en función del relieve semántico de preocupaciones éticas

El análisis de la novela está precedido por una síntesis del pensamiento de Eduardo Mallea sobre la caída de los valores de la sociedad argentina. En esta introducción se incluye asimismo información que atañe al contexto referencial de la novela y que se vincula con las consecuencias de la crisis económica de 1929 en la Argentina. Una aproximación global al texto adelanta componentes referenciales de la diégesis que hacen presentes manejos económicos espurios, el brote de racismo antisemita que precedió a la Segunda Guerra Mundial y el asesinato de Federico García Lorca. La cuarta sección del estudio enfoca la superficie textual de la novela. Dos vertientes diegéticas dan lugar a segmentos que se alternan en la que fue, para su época, una innovadora estructuración textual. Las voces narradoras, los monólogos interiores, los procedimientos del lenguaje figurado, la relación adentro-afuera en el desarrollo de la acción completan el análisis. La quinta sección del trabajo aborda la diégesis y la estructura semántica profunda del texto.

Tab. 2: Grain-sizes of cobble on the surface of sanderwurzel

yResults of 13 field investigations between 1966 and 1990 of the southwestern to eastern margin of Kötlujökull and its proglacial area are summarized with respect to sandar and their formation. Generally, the results are based on sedimentological examinations in the field and laboratory, on analyses of aerial photographs, and investigations of the glacier slope. The methods permitted a more detailed reconstruction of sandar evolution in the proglacial area of Kötlujökull since 1945, of tendencies in development and of single data going back until the last decades of the 19th century. Accordingly, there existed special periods of "flachsander"-formations with raised coarsegrained "sanderwurzels" resultant from the outbreak of subglacial meltwater tunneloutlets and other periods with "hochsander-"formations by supraglacial drainage. At present the belts of hochsanders in front of the glacier come up to more than 4 m in thickness and 1000 m in width, therefore containing perhaps more sediment direct in front of Kötlujökull than the old belts of flachsanderwurzels. In one case the explosion-like subglacial meltwater outburst combined with the genesis of a sanderwurzel could be observed for a time and is thoroughly discussed. The event is referred to the outburst of a sub- to inglacial meltwater body being under extreme hydrostatic press ures which is combined with the genesis of a new subglacial tunneloutlet as a new flachsander. Often these outbursts led to the destruction of a morainic belt more than 1000 m in width. Presumably the whole event was finished in not more than a few days. In addition to a characteristic pear-shaped form and water-moved stones up to diameters of 1 m the wurzels possess a single "main-channel" with rectangular cross-sections as far as 4 m deep and 50 m wide just as small flat channels resembling fish bones in connection with the main channel. Presumably, they have been active only in the last stage of wurzel formation. With regard to the subglacial tunnel gates long-living L-meltwater outlets are distinguished from short-living K-meltwater outlets. These are always combined with a raised coarse-grained sanderwurzel, but its meltwater discharge is generally decreasing and ceases after some years, whereas the discharge of L-meltwater outlets continues unchanged for long times (except seasonal differences). The material of flachsanders is preponderantly composed of mugearitic and andesitic cobble extending at least for some kilometres from the glacier margin, whereas the hochsanders correspond to medium to coarse sands without clay and without alternations into the direction of flow. The hochsander fans are covered with small braidet channels. Their sedimentary structures are determined by the short time changing of supraglacial meltwater discharge and the upper flow regime combined with the development of antidunes, which rule the channel-flows during the main activity periods in summer. Unlike the subglacial drainage the supraglacial drainage led to only weak effects of erosion on the glacier foreland. So the hochsanders refilled depressions of morainic areas or grew up on older flachsanderwurzels. Whereas all large flachsanders developed in front of approximate stationary glacier margins, the evolution of coherent belts of hochsanders were combined with progressive glacier fronts. On the other hand, there was obviously no evolution at all of large sandar in front of back-melting margins of Kötlujökull. Based on examinations of the glacier surface and on analyses of aerial photographs the different types of sandar are referred to different structures of the glacier snout. Finally chances of surviving of sandar in the proglacial area of Kötlujökull are shortly discussed just as the possibility of an application of the Islandic research results on Pleistocene sandar in northern Germany.

Abundance of Cnidaria and Ctenophora in the North Atlantic sampled during the G. O. Sars Cruise in May 2013

In recent years a global increase in jellyfish (i.e. Cnidarians and Ctenophores) abundance and a rise in the recurrence of jellyfish outbreak events have been largely debated, but a general consensus on this matter has not been achieved yet. Within this debate, it has been generally recognized that there is a lack of reliable data that could be analyzed and compared to clarify whether indeed jellyfish are increasing throughout the world ocean as a consequence of anthropogenic impact and hydroclimatic variability. During the G.O. Sars cruise jellyfish were collected at different depths in the 0-1000m layer using a standard 1 m**2 Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) (quantitative data), Harstad and macroplankton trawls (qualitative data). The comparison of records collected with different nets during the G.O. Sars transatlantic cruise shows that different sampling gears might provide very different information on jellyfish diversity. Indeed, the big trawls mostly collect relatively large scyphozoan and hydrozoan species such as Atolla, Pelagia, Praya, Vogtia, while small hydrozoans (e.g. Clytia, Gilia, Muggiaea) and early stages of ctenophora are only caught by the smaller nets.

El socialismo europeo en la encrucijada : Debates sobre cuestión nacional y revolución social en la Segunda Internacional

Este artículo tiene por objetivo reinterpretar la relación abierta en la Segunda Internacional entre la cuestión nacional y la lucha de clases, planteando que las causas de la posición triunfante en 1914 deben ser buscadas en los años anteriores al estallido bélico. El análisis de textos fundamentales producidos antes y durante la Gran Guerra por los teóricos más influyentes del socialismo europeo en torno de las naciones y las nacionalidades permite captar en toda su significación de qué manera en dicha coyuntura se jugó la concepción socialista de "revolución social", indisolublemente atravesada por el carácter sociopolítico que se estuvo dispuesto a conceder a las masas proletarias y a sus formas de intervención práctica

El socialismo europeo en la encrucijada : Debates sobre cuestión nacional y revolución social en la Segunda Internacional

Este artículo tiene por objetivo reinterpretar la relación abierta en la Segunda Internacional entre la cuestión nacional y la lucha de clases, planteando que las causas de la posición triunfante en 1914 deben ser buscadas en los años anteriores al estallido bélico. El análisis de textos fundamentales producidos antes y durante la Gran Guerra por los teóricos más influyentes del socialismo europeo en torno de las naciones y las nacionalidades permite captar en toda su significación de qué manera en dicha coyuntura se jugó la concepción socialista de "revolución social", indisolublemente atravesada por el carácter sociopolítico que se estuvo dispuesto a conceder a las masas proletarias y a sus formas de intervención práctica

El socialismo europeo en la encrucijada : Debates sobre cuestión nacional y revolución social en la Segunda Internacional

Este artículo tiene por objetivo reinterpretar la relación abierta en la Segunda Internacional entre la cuestión nacional y la lucha de clases, planteando que las causas de la posición triunfante en 1914 deben ser buscadas en los años anteriores al estallido bélico. El análisis de textos fundamentales producidos antes y durante la Gran Guerra por los teóricos más influyentes del socialismo europeo en torno de las naciones y las nacionalidades permite captar en toda su significación de qué manera en dicha coyuntura se jugó la concepción socialista de "revolución social", indisolublemente atravesada por el carácter sociopolítico que se estuvo dispuesto a conceder a las masas proletarias y a sus formas de intervención práctica

El socialismo europeo en la encrucijada : Debates sobre cuestión nacional y revolución social en la Segunda Internacional

Este artículo tiene por objetivo reinterpretar la relación abierta en la Segunda Internacional entre la cuestión nacional y la lucha de clases, planteando que las causas de la posición triunfante en 1914 deben ser buscadas en los años anteriores al estallido bélico. El análisis de textos fundamentales producidos antes y durante la Gran Guerra por los teóricos más influyentes del socialismo europeo en torno de las naciones y las nacionalidades permite captar en toda su significación de qué manera en dicha coyuntura se jugó la concepción socialista de "revolución social", indisolublemente atravesada por el carácter sociopolítico que se estuvo dispuesto a conceder a las masas proletarias y a sus formas de intervención práctica

Biogeography of jellyfish in the North Atlantic

In recent years a global increase in jellyfish (i.e. Cnidarians and Ctenophores) abundance and a rise in the recurrence of jellyfish outbreak events have been largely debated, but a general consensus on this matter has not been achieved yet. Within this debate, it has been generally recognised that there is a lack of reliable data that could be analysed and compared to clarify whether indeed jellyfish are increasing throughout the world ocean as a consequence of anthropogenic impact and hydroclimatic variability. Here we describe different jellyfish data sets produced within the EU program EUROBASIN, which have been assembled with the aim of presenting an up to date overview on the diversity and standing stocks of North Atlantic jellyfish. Abundance and species composition were determined in samples collected in the epipelagic layer (0- 200m), using a net well adapted to quantitatively catching gelatinous zooplankton. The samples were collected in spring-summer (April-August) 2010-2013, in inshore and offshore North Atlantic waters, between 59-68LatN and 62W-5ELong. Jellyfish were also identified and counted in samples opportunistically collected by other sampling gears in the same region and in two coastal stations in the Bay of Biscay and in the Gulf of Cadiz. Continuous Plankton Recorder (CPR) samples collected in 2009-2012 were re-analysed with the aim of identifying the time and location of jellyfish blooms across the North Atlantic basin.

Abundance of Cnidaria and Ctenophora taxa in the North Atlantic sampled during the G. O. Sars Cruise in May 2013

In recent years a global increase in jellyfish (i.e. Cnidarians and Ctenophores) abundance and a rise in the recurrence of jellyfish outbreak events have been largely debated, but a general consensus on this matter has not been achieved yet. Within this debate, it has been generally recognized that there is a lack of reliable data that could be analyzed and compared to clarify whether indeed jellyfish are increasing throughout the world ocean as a consequence of anthropogenic impact and hydroclimatic variability. During the G.O. Sars cruise jellyfish were collected at different depths in the 0-1000m layer using a standard 1 m**2 Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) (quantitative data), Harstad and macroplankton trawls (qualitative data). The comparison of records collected with different nets during the G.O. Sars transatlantic cruise shows that different sampling gears might provide very different information on jellyfish diversity. Indeed, the big trawls mostly collect relatively large scyphozoan and hydrozoan species such as Atolla, Pelagia, Praya, Vogtia, while small hydrozoans (e.g. Clytia, Gilia, Muggiaea) and early stages of ctenophora are only caught by the smaller nets.

Industrialization in Indonesia since the 1970s

Introduction: During the period from the latter half of the 1980s until just before the Asian currency crisis in 1997, Indonesia’s economic development had drawn expectations and attention from various quarters, along with Malaysia and Thailand within the same Association of Southeast Asian Nations (ASEAN). In fact, the 1993 report by the World Bank, entitled “East Asian Miracle: Economic Growth and Public Policy,” recognized Indonesia as one of the East Asian economies with the strong economic performance, i.e. sustained economic growth (World Bank [1993]). And it was the manufacturing industry that had been the driving force behind Indonesia’s economic growth during that period. Since the 1997 outbreak of the Asian currency crisis, however, the manufacturing sector in Indonesia has been mired in a situation that rules out the kind of bright prospects it had emanated previously. The Indonesian economy is still in the developing stage, and in accordance with the history of industrial structural changes in other countries, Indonesia’s manufacturing industry can still be expected to serve as the engine of the country’s economic development. But is it really possible in an environment where economic liberalization and globalization are forging ahead? And, what sort of problems have to be dealt with to make it possible? To answer these questions, it is necessary to know the current conditions of Indonesia’s manufacturing sector, and to do that, it becomes important to think back on the history of the country’s industrialization. Thus, this paper is intended to retrace and unlock the track of Indonesia’s industrialization up until the establishment of the manufacturing sector in its present form, with the ultimate goal being to give answers to the above-mentioned questions. Subject to an analysis in this paper is the period from the installment of President Soeharto’s administration onward when industrialization of the modern industrial sector2 moved into high gear. 　　　The composition of this paper is outlined below. Section 1 first shows why it is important to examine import substitution and export orientation, both of which are used as the measures of the analysis in this paper, in tracking the history of the industrialization, and then discuss indicators of import substitution and export orientation as well as statistical data and resources needed to develop those indicators. Section 2 clarifies the status of the manufacturing industry among all industries by looking at the composition ratio of the manufacturing industry in terms of value added, imports and exports. Section 3 to 5 cover three periods between 1971 and 1995 and make an analysis of import substitution, export orientation and changes in the industrial structure for each period. Section 3 analyzes the period from 1971 through 1985, when Indonesia pursued the import substitution policy amid the oil boom. Section 4 covers the period from 1985 through 1990, when the packages of deregulatory measures were announced successively under structural adjustment policies made necessary by the fall in oil prices. Section 5 examines the period from 1990 through 1995, which saw the alternate shifts between the overheating of the economy by sharply rising investment by both domestic and foreign investors in the wake of the liberalization of investment, trade and financial services, and polices to cool down the economy. Section 6, which covers the 1995-1999 period straddling the economic crisis, is designed for an analysis of the changes in production trends before and after the economic crisis as well as the changes in the industrial structure. Section 7, after summing up the history of Indonesia’s industrialization examined in the previous sections, discusses problems found in respective sectors and attempts to present future prospects for the country’s manufacturing industry.

Variable efficacy of repeated annual influenza vaccination

Conclusions have differed in studies that have compared vaccine efficacy in groups receiving influenza vaccine for the first time to efficacy in groups vaccinated more than once. For example, the Hoskins study [Hoskins, T. W., Davis, J. R., Smith, A. J., Miller, C. L. & Allchin, A. (1979) Lancet i, 33–35] concluded that repeat vaccination was not protective in the long term, whereas the Keitel study [Keitel, W. A., Cate, T. R., Couch, R. B., Huggins, L. L. & Hess, K. R. (1997) Vaccine 15, 1114–1122] concluded that repeat vaccination provided continual protection. We propose an explanation, the antigenic distance hypothesis, and test it by analyzing seven influenza outbreaks that occurred during the Hoskins and Keitel studies. The hypothesis is that variation in repeat vaccine efficacy is due to differences in antigenic distances among vaccine strains and between the vaccine strains and the epidemic strain in each outbreak. To test the hypothesis, antigenic distances were calculated from historical hemagglutination inhibition assay tables, and a computer model of the immune response was used to predict the vaccine efficacy of individuals given different vaccinations. The model accurately predicted the observed vaccine efficacies in repeat vaccinees relative to the efficacy in first-time vaccinees (correlation 0.87). Thus, the antigenic distance hypothesis offers a parsimonious explanation of the differences between and within the Hoskins and Keitel studies. These results have implications for the selection of influenza vaccine strains, and also for vaccination strategies for other antigenically variable pathogens that might require repeated vaccination.

High-resolution minisatellite-based typing as a portable approach to global analysis of Mycobacterium tuberculosis molecular epidemiology

The worldwide threat of tuberculosis to human health emphasizes the need to develop novel approaches to a global epidemiological surveillance. The current standard for Mycobacterium tuberculosis typing based on IS6110 restriction fragment length polymorphism (RFLP) suffers from the difficulty of comparing data between independent laboratories. Here, we propose a high-resolution typing method based on variable number tandem repeats (VNTRs) of genetic elements named mycobacterial interspersed repetitive units (MIRUs) in 12 human minisatellite-like regions of the M. tuberculosis genome. MIRU-VNTR profiles of 72 different M. tuberculosis isolates were established by PCR analysis of all 12 loci. From 2 to 8 MIRU-VNTR alleles were identified in the 12 regions in these strains, which corresponds to a potential of over 16 million different combinations, yielding a resolution power close to that of IS6110-RFLP. All epidemiologically related isolates tested were perfectly clustered by MIRU-VNTR typing, indicating that the stability of these MIRU-VNTRs is adequate to track outbreak episodes. The correlation between genetic relationships inferred from MIRU-VNTR and IS6110-RFLP typing was highly significant. Compared with IS6110-RFLP, high-resolution MIRU-VNTR typing has the considerable advantages of being fast, appropriate for all M. tuberculosis isolates, including strains that have a few IS6110 copies, and permitting easy and rapid comparison of results from independent laboratories. This typing method opens the way to the construction of digital global databases for molecular epidemiology studies of M. tuberculosis.