957 resultados para Global Positioning System (GPS)
Resumo:
The paper analyses the development of the contemporary global financial system as a consequence of markets as well as States strategies. This global financial system based on the flexible dollar has generated many financial bubbles since it started in the 80s, of which the 2008 crisis is the latest and the largest, particularly because it affected the main banks in the core market of the system, the U.S. On the last decades, banks had changed their business strategies from traditional lending activities towards more speculative investments, similar to what hedge funds do.
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Suomessa merkittävimpiä talouden laskusuhdanteita ja talouskriisejä ovat sotien jälkeen olleet 1990-luvun alun lama sekä vuonna 2008 alkanut finanssikriisin jälkeinen taantuma. Näillä kahdella ilmiöllä on ollut laajalti vaikutuksia koko kansantalouteemme, ja luonnollisesti suomalaisten kuluttajien taloudellinen hyvinvointi on muuttunut ilmiöiden myötä. Yksilöiden aiempaa huonompi taloudellinen hyvinvointi laskusuhdanteissa aiheutuu laskeneista tuloista, työttömyydestä ja varallisuushintojen laskusta sekä edellä mainittujen seurauksista. Tämän tutkielman tavoitteena on analysoida ja vertailla 1990-luvun laman ja 2000-luvun globaalin finanssikriisin aiheuttamia taloudellisia vaikutuksia suomalaisille kuluttajille. Lisäksi tarkoituksena on selvittää, minkä eri tekijöiden kautta laskusuhdanteet vaikuttavat kuluttajiin ja miksi. Tutkielman empiirisessä osiossa käytetään pääasiassa Tilastokeskuksen tuottamaa kvantitatiivista materiaalia sekä analyysin rikastamiseksi erilaisia kvalitatiivisia tutkimustuloksia aiheesta. Tutkielman lopputuloksena voidaan todeta 1990-luvun laman vaikuttaneen suomalaisiin kuluttajiin voimakkaammin ja pitkäkestoisemmin kuin finanssikriisin aiheuttaman taantuman. Laman vaikutukset kestivät useita vuosia, ja palautuminen oli hidasta. Erityisen suureksi ongelmaksi nousi työttömyyden voimakas kasvu. Finanssikriisin myötä työttömyys reagoi bruttokansantuotteen laskuun nähden sen sijaan maltillisesti, eivätkä esimerkiksi kotitalouksien tulot laskeneet samalla tavalla kuin laman aikana. Lisäksi merkittävässä osassa 1990-luvun lamaa oli asuntomarkkinoiden hintakupla ja sen puhkeaminen, jolla oli voimakas vaikutus reaalitalouteen. Laskukausien toisistaan poikkeavat vaikutukset johtuvat pitkälti niiden syntyyn johtaneiden syiden eroista sekä valtion talouspoliittisista toimista laskukausien helpottamiseksi. Siinä missä 1990-luvun lama johtui pääasiassa Suomen sisäisistä poliittisista päätöksistä ja pankkisektorista, oli finanssikriisi Suomen ulkopuolinen globaalin rahoitusmarkkinoiden häiriö.
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L’équilibre économique mondial repose sur une asymétrie structurelle dont les pôles antagonistes principaux sont les États-Unis et l’Asie orientale. À la base de cet axe de tension géographique se trouve la question de la représentation mondiale de la richesse. La domination du dollar permet aux États-Unis un accès disproportionné aux ressources planétaires. Les pays créanciers, dont fait partie la Chine, hésitent à laisser flotter leur monnaie et attaquer l’hégémonie du dollar. Entre temps, les déséquilibres s’intensifient, tout comme les tensions politiques, par l’effet de ce système monétaire qui participe au maintien d’un monde unipolaire. Le système monétaire actuel n’offre aucune perspective endogène quant à la résolution des déséquilibres que son équilibre requiert. Ce mémoire cherche à identifier les stratégies géoéconomiques de la Chine pour se soustraire de l’emprise du dollar.
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Oceans play a vital role in the global climate system. They absorb the incoming solar energy and redistribute the energy through horizontal and vertical transports. In this context it is important to investigate the variation of heat budget components during the formation of a low-pressure system. In 2007, the monsoon onset was on 28th May. A well- marked low-pressure area was formed in the eastern Arabian Sea after the onset and it further developed into a cyclone. We have analysed the heat budget components during different stages of the cyclone. The data used for the computation of heat budget components is Objectively Analyzed air-sea flux data obtained from WHOI (Woods Hole Oceanographic Institution) project. Its horizontal resolution is 1° × 1°. Over the low-pressure area, the latent heat flux was 180 Wm−2. It increased to a maximum value of 210 Wm−2 on 1st June 2007, on which the system was intensified into a cyclone (Gonu) with latent heat flux values ranging from 200 to 250 Wm−2. It sharply decreased after the passage of cyclone. The high value of latent heat flux is attributed to the latent heat release due to the cyclone by the formation of clouds. Long wave radiation flux is decreased sharply from 100 Wm−2 to 30 Wm−2 when the low-pressure system intensified into a cyclone. The decrease in long wave radiation flux is due to the presence of clouds. Net heat flux also decreases sharply to −200 Wm−2 on 1st June 2007. After the passage, the flux value increased to normal value (150 Wm−2) within one day. A sharp increase in the sensible heat flux value (20 Wm−2) is observed on 1st June 2007 and it decreased there- after. Short wave radiation flux decreased from 300 Wm−2 to 90 Wm−2 during the intensification on 1st June 2007. Over this region, short wave radiation flux sharply increased to higher value soon after the passage of the cyclone.
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The global power supply stability is faced to several severe and fundamental threats, in particular steadily increasing power demand, diminishing and degrading fossil and nuclear energy resources, very harmful greenhouse gas emissions, significant energy injustice and a structurally misbalanced ecological footprint. Photovoltaic (PV) power systems are analysed in various aspects focusing on economic and technical considerations of supplemental and substitutional power supply to the constraint conventional power system. To infer the most relevant system approach for PV power plants several solar resources available for PV systems are compared. By combining the different solar resources and respective economics, two major PV systems are identified to be very competitive in almost all regions in the world. The experience curve concept is used as a key technique for the development of scenario assumptions on economic projections for the decade of the 2010s. Main drivers for cost reductions in PV systems are learning and production growth rate, thus several relevant aspects are discussed such as research and development investments, technical PV market potential, different PV technologies and the energetic sustainability of PV. Three major market segments for PV systems are identified: off-grid PV solutions, decentralised small scale on-grid PV systems (several kWp) and large scale PV power plants (tens of MWp). Mainly by application of ‘grid-parity’ and ‘fuel-parity’ concepts per country, local market and conventional power plant basis, the global economic market potential for all major PV system segments is derived. PV power plant hybridization potential of all relevant power technologies and the global power plant structure are analyzed regarding technical, economical and geographical feasibility. Key success criteria for hybrid PV power plants are discussed and comprehensively analysed for all adequate power plant technologies, i.e. oil, gas and coal fired power plants, wind power, solar thermal power (STEG) and hydro power plants. For the 2010s, detailed global demand curves are derived for hybrid PV-Fossil power plants on a per power plant, per country and per fuel type basis. The fundamental technical and economic potentials for hybrid PV-STEG, hybrid PV-Wind and hybrid PV-Hydro power plants are considered. The global resource availability for PV and wind power plants is excellent, thus knowing the competitive or complementary characteristic of hybrid PV-Wind power plants on a local basis is identified as being of utmost relevance. The complementarity of hybrid PV-Wind power plants is confirmed. As a result of that almost no reduction of the global economic PV market potential need to be expected and more complex power system designs on basis of hybrid PV-Wind power plants are feasible. The final target of implementing renewable power technologies into the global power system is a nearly 100% renewable power supply. Besides balancing facilities, storage options are needed, in particular for seasonal power storage. Renewable power methane (RPM) offers respective options. A comprehensive global and local analysis is performed for analysing a hybrid PV-Wind-RPM combined cycle gas turbine power system. Such a power system design might be competitive and could offer solutions for nearly all current energy system constraints including the heating and transportation sector and even the chemical industry. Summing up, hybrid PV power plants become very attractive and PV power systems will very likely evolve together with wind power to the major and final source of energy for mankind.
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From its inception as a global hypertext system, the Web has evolved into a universal platform for deploying loosely coupled distributed applications. 2^W is a result of the exponentially growing Web building on itself to move from a Web of content to a Web of applications.
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El autor aborda en este artículo cuestiones atinentes al espacio, la geografía y la organización del territorio a partir del tema del desarrollo. Para fundamentar su tesis según la cual varios de los factores que impulsan la globalización tienen una base territorial, como el comercio internacional de bienes y servicios, el cambio tecnológico o los flujos internacionales, apela a las categorías del desarrollo social y las sitúa en dos dimensiones. En una primera instancia, el autor toma en cuenta la lógica intranacional de despliegue de los factores políticos, ambientales y comerciales; en un segundo momento destaca el papel de las regiones y las localidades en la reconstrucción del sistema económico mundial para concluir que en un contexto todavía incierto se destaca la configuración de regiones megapolitanas que funcionan como motores regionales en la nueva economía global.---The author handles this article with questions that regard space,geography and territorial organisation based on the topic of development. To support his thesis that refers to the way in which various factors that give an impulse to globalisation have a territorial base, such as the international commerce of goods and services, technological change or international networks, the author utilises social development categories and places them in two dimensions. Initially, the author takes into account the international logic of the development of commercial, environment and political factors. Secondly, he emphasizes the role of regions and localities in the reconstruction of the global economic system to conclude that in a present uncertain context it is worth pointing out the configuration of megapolitanregions that function as regional motors in a new global economy.
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La presente monografía tiene por objetivo identificar la influencia de las acciones emprendidas por la sociedad civil y las organizaciones internacionales frente a la problemática de la trata de personas en Colombia, durante el período comprendido entre los años 2000 y 2012. En este sentido, la investigación constituye un esfuerzo por develar las transformaciones en las narrativas institucionales que han posibilitado el reconocimiento de los elementos de prevención y centralidad de las víctimas, como ejes articuladores del discurso gubernamental frente a la trata de personas. Para ello, se hace uso de la teoría de la gobernanza global enmarcada en el enfoque constructivista de las Relaciones Internacionales, en tanto permite establecer una relación entre las acciones de los diferentes actores y el impacto de estas en la construcción de estrategias nacionales para hacer frente a problemáticas que, como la trata de personas, se encuentran en estrecha relación con el mundo globalizado.
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A nivel internacional existe consenso respecto a la importancia que tiene el marco institucional para el funcionamiento eficiente del sistema financiero y para la generación de incentivos correctos para mantener la disciplina de mercado. Por eso mismo, durante los últimos diez años, se ha estado discutiendo, especialmente a nivel técnico, respecto de las condiciones de una nueva arquitectura financiera internacional que se ajuste a la realidad de un sistema financiero globalizado, y se han generado políticas, lineamientos y mínimos estándares para los sistemas financieros que han sido recogidos fundamentalmente por normas informales conocidas como softlaw y por órganos igualmente informales. La Declaración de la Cumbre del G20 en Washington de noviembre de 2008 estableció cinco principios comunes para reforma del sistema financiero que deben ser considerados en esta nueva arquitectura, a la que se puede definir como ""el establecimiento e implementación, a nivel nacional e internacional, de reglas, principios y arreglos institucionales que aseguren la estabilidad del sistema financiero internacional, previniendo las crisis y estableciendo los mecanismos institucionales para enfrentarlas o mitigarlas"". Sin embargo de esto, no existe una conciencia clara de que el problema de la nueva arquitectura financiera internacional es un problema ante todo jurídico: los órganos informales creados y el softlaw son insuficientes para crear las condiciones necesarias para asegurar el obligatorio cumplimiento y la aplicación general de este marco de regulación financiera global. Además, el principio de la soberanía de los Estados, base de los ordenamientos y sistemas jurídicos actuales, de naturaleza fundamentalmente nacional, y norma fundamental para las relaciones entre Estados, en el Derecho público internacional, vuelve complejay demorada la creación de un nuevo sistema de gobernanza global que viabilice esta nueva arquitectura financiera internacional y permita devolver rápidamente la confianza perdida y la estabilidad de este nuevo sistema financiero global.
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Actualmente la profunda crisis del sistema financiero internacional, similar a la que vivió Estados Unidos en los años treinta, es el punto más importante de discusión en todo el mundo. Por ello, se consideró importante realizar un análisis de la Ley Glass Steagall Act, promulgada en el año 1933, justamente como una salida a la crisis financiera estadounidense, de aquella época, precisando cuáles son sus principales características, y sobre todo los efectos que su derogatoria (en 1999) trajo consigo en el sistema financiero mundial, pues como veremos, para muchos la actual crisis es producto de la inadecuada mezcla de regulación y libertad que se produjo con la promulgación de la Ley Gramm Leach Bliley Act, mediante la cual los bancos comerciales empezaron a incursionar en operaciones bursátiles, actividades que anteriormente estaban vetadas, y por tanto existían garantías suficientes para los depositantes.
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The global monsoon system is so varied and complex that understanding and predicting its diverse behaviour remains a challenge that will occupy modellers for many years to come. Despite the difficult task ahead, an improved monsoon modelling capability has been realized through the inclusion of more detailed physics of the climate system and higher resolution in our numerical models. Perhaps the most crucial improvement to date has been the development of coupled ocean-atmosphere models. From subseasonal to interdecadal time scales, only through the inclusion of air-sea interaction can the proper phasing and teleconnections of convection be attained with respect to sea surface temperature variations. Even then, the response to slow variations in remote forcings (e.g., El Niño—Southern Oscillation) does not result in a robust solution, as there are a host of competing modes of variability that must be represented, including those that appear to be chaotic. Understanding the links between monsoons and land surface processes is not as mature as that explored regarding air-sea interactions. A land surface forcing signal appears to dominate the onset of wet season rainfall over the North American monsoon region, though the relative role of ocean versus land forcing remains a topic of investigation in all the monsoon systems. Also, improved forecasts have been made during periods in which additional sounding observations are available for data assimilation. Thus, there is untapped predictability that can only be attained through the development of a more comprehensive observing system for all monsoon regions. Additionally, improved parameterizations - for example, of convection, cloud, radiation, and boundary layer schemes as well as land surface processes - are essential to realize the full potential of monsoon predictability. A more comprehensive assessment is needed of the impact of black carbon aerosols, which may modulate that of other anthropogenic greenhouse gases. Dynamical considerations require ever increased horizontal resolution (probably to 0.5 degree or higher) in order to resolve many monsoon features including, but not limited to, the Mei-Yu/Baiu sudden onset and withdrawal, low-level jet orientation and variability, and orographic forced rainfall. Under anthropogenic climate change many competing factors complicate making robust projections of monsoon changes. Absent aerosol effects, increased land-sea temperature contrast suggests strengthened monsoon circulation due to climate change. However, increased aerosol emissions will reflect more solar radiation back to space, which may temper or even reduce the strength of monsoon circulations compared to the present day. Precipitation may behave independently from the circulation under warming conditions in which an increased atmospheric moisture loading, based purely on thermodynamic considerations, could result in increased monsoon rainfall under climate change. The challenge to improve model parameterizations and include more complex processes and feedbacks pushes computing resources to their limit, thus requiring continuous upgrades of computational infrastructure to ensure progress in understanding and predicting current and future behaviour of monsoons.
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Airborne laser altimetry has the potential to make frequent detailed observations that are important for many aspects of studying land surface processes. However, the uncertainties inherent in airborne laser altimetry data have rarely been well measured. Uncertainty is often specified as generally as 20cm in elevation, and 40cm planimetric. To better constrain these uncertainties, we present an analysis of several datasets acquired specifically to study the temporal consistency of laser altimetry data, and thus assess its operational value. The error budget has three main components, each with a time regime. For measurements acquired less than 50ms apart, elevations have a local standard deviation in height of 3.5cm, enabling the local measurement of surface roughness of the order of 5cm. Points acquired seconds apart acquire an additional random error due to Differential Geographic Positioning System (DGPS) fluctuation. Measurements made up to an hour apart show an elevation drift of 7cm over a half hour. Over months, this drift gives rise to a random elevation offset between swathes, with an average of 6.4cm. The RMS planimetric error in point location was derived as 37.4cm. We conclude by considering the consequences of these uncertainties on the principle application of laser altimetry in the UK, intertidal zone monitoring.
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A quarter of a century of daily rainfall data from the Global Telecommunications System are used to define the temporal and spatial variability of the start of the wet season over Africa and surrounding extreme south of Europe and parts of the Middle East. From 1978 to 2002, the start of the wet season arrived later in the year for the majority of the region, as time progressed. In some parts of the continent, there was an annual increase in the start date of up to 4 days per year. On average, the start of the wet season arrived 9–21 days later from 1978 to 2002, depending on the threshold used to define the start of the rains (varying from 10–30 mm over 2 days, with no dry period in the following 10 days). It is noted that the inter-annual variability of the start of the wet season is high with the range of start dates varying on average from 116 to 142 days dependent on the threshold used to determine the start date. These results may have important implications for agriculturists on all levels (from the individual farmer to those responsible for regional food supply), as knowledge of potential future climate changes starts to play an increasingly important role in the agricultural decision-making process, such as sowing and harvesting times.
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The recent celebrations of the centenary of the publication of the Futurist manifesto led to a renewed discussion of the ideas and artworks of the Italian artists’ group. Jacques Rancière related the Futurist ethos with the modernist project of liberating art from representation. Franco ‘Bifo’ Berardi, in his post-Futurist manifesto, also identified a historical irony at play in the emptying out of Futurism’s promise: a liberated mechanical humanity did indeed materialize, in a global economic system premised on financial servitude to the future via debt. However, these models continue to assess Futurism against an unchallenged humanism, finding it either supporting ideals of freedom and human rights despite itself, or else lacking in these areas. But Futurism is potentially more relevant than ever not in spite of its anti-humanist agenda, precisely because of it. Tom McCarthy annexes not Futurist art but Futurist writing to an emerging object oriented ontology that seeks to challenge the primacy of the human. If Futurism is to be repurposed as a critical concept, it can only do so by countering the humanist myth the liberal subject that underlies the current cultural and political hegemony of neo-liberalism.
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The problem of the world greatest lake, the Caspian Sea, level changes attracts the increased attention due to its environmental consequences and unique natural characteristics. Despite the huge number of studies aimed to explain the reasons of the sea level variations the underlying mechanism has not yet been clarified. The important question is to what extent the CSL variability is linked to changes in the global climate system and to what extent it can be explained by internal natural variations in the Caspian regional hydrological system. In this study an evidence of a link between the El Niño/Southern Oscillation phenomenon and changes of the Caspian Sea level is presented. This link was also found to be dominating in numerical experiments with the ECHAM4 atmospheric general circulation model on the 20th century climate.