Literatura académica sobre el tema "FEM medeling"

The Medellin Metaharzburgitic Unit (MMU), emplaced onto the western continental margin of Pangea during Triassic time, is located in the Central Cordillera of Colombia and consists of metaharzburgites, minor metadunites and chromitite bodies (Patio Bonito and San Pedro ore deposits). The ultramafic rocks contain relicts of mantle-derived olivine, chromian spinel and minor orthopyroxene, and a later metamorphic mineral assemblage composed by tremolite, chlorite, talc, fine-grained recrystallized olivine, serpentine-group minerals, magnetite, and secondary chromian spinel, formed during the thermal evolution of the unit. The Cr# [Cr/(Cr+Al) atomic ratio] of the accessory primary chromian spinel in the metaperidotites ranges from 0.58 to 0.62 and overlaps those of supra-subduction peridotites from ophiolites. According to textural and compositional variations, the accessory chromian spinel in the metaperidotites can be classified into three groups: i) partially altered chromian spinel with an Al-rich core, ii) porous, Cr-Fe2+-enriched and Al-Mg-depleted chromian spinel, and iii) homogeneous Fe3+-rich chromian spinel. These variations can be related to superimposed medium-T metamorphism that reached amphibolite facies (ca. 600 ºC). Chromitite bodies associated with the metaperidotites have massive and semi-massive textures, and mainly consist of chromian spinel crystals, which show large unaltered cores surrounded by thin alteration rims of ferrian chromian spinel and chlorite. Chromitites are Al-rich (#Cr <0.6) and strongly depleted in platinum group elements (ΣPGE <41 ppb). The primary petrological and geochemical characteristics preserved in the metaperidotites and chromitites indicate that the MMU formed at shallow levels of a suboceanic lithospheric mantle related to a supra-subduction zone (back-arc basin/incipient arc scenario), and that the chromitites crystallized from a tholeiitic magma (back-arc basin basalt type).

Background:Takayasu’s arteritis (TA) is most prevalent in women of childbearing age. Although its activity and risk of relapse are low during pregnancy, up to 40% of patients may have unfavorable obstetric outcomes and therefore it is important to know their clinical behavior.Objectives:To describe the clinical features and obstetric outcomes of pregnant women with TA treated in a tertiary center.Methods:Retrospective evaluation of medical records of 6 pregnancies in 6 women with TAs treated in a tertiary center in Medellin, Colombia between 2011-2018.Results:Six women who were 17.5 (RI 9.25) years old at diagnosis and 24 (RI 8.25) years old at delivery, their disease duration were 5.5 (RI 10.5) years. Three patients had extensive aortic involvement classified as Numano type V, two as type IIB and one as type I. At delivery, three patients were active and required immunosuppressants, five had high blood pressure, one developed preeclampsia in the second trimester, one had severe mitral and tricuspid insufficiency with decreased ejection fraction of the left ventricle; two had aneurysms (left subclavian artery and ascending aorta). There were two fetal deaths, one due to intrauterine growth restriction and placental insufficiency and another of unknown etiology; both patients with disease activity, extensive aortic condition and arterial hypertension; no pregnancy resulted in abortion or preterm birth. Five deliveries were by caesarean section by maternal indication; there was no aortic dissection, aneurismal rupture or cerebral hemorrhage (table).TablePatient’s characteristicsPatientAge at diagnosisAge at deliveryClinical featuresHata-Numano classificationMaternal outcomeFetal outcome1617HT, absence of left brachial and radial pulses, L carotid and subclavian murmurs, LVEF 47%VHT, C-sectionTerm delivery, SGA22226HT, abscence of L brachial and radial pulses, L carotid and subclavian murmurs, dyspnea, anginaV(plus pulmonary)HT, vaginal birthPlacental insufficiency, IUGR, fetal death31438HT, abscence of L brachial and radial pulses, L carotid and subclavian murmurs, intermittent claudication, dyspnea, aortic regurgitationIIBHT, C-sectionTerm delivery, SGA41824HT, malaise,, abscence of L brachial and radial pulses, intermittent claudication, arthralgiaIIBPreeclampsia, C-sectionTerm delivery, SGA51722Fever, malaise, intermittent claudication, arthralgiaIC-sectionTerm delivery, SGA62124HT, abscense of bilateral femoral, popliteal, tibial and pedial pulses, headache, dizziness, amaurosisVHT, C-sectionFetal deathHT: hypertension; L: left; LVEF: left ventricular ejection fraction; C-section: cesarean section; SGA: small for gestational age; IUGR: intrauterine growth restrictionConclusion:Pregnant women with active disease and extensive aortic condition presented unfavorable obstetric results, suggesting that an inadequate control of vasculitis may lead to greater maternal-fetal complications.References:[1]Assad APL, da Silva TF, Bonfa E, Pereira RMR. Maternal and Neonatal Outcomes in 89 Patients with Takayasu Arteritis (TA): Comparison Before and After the TA Diagnosis. J Rheumatol. 2015 Oct;42(10):1861–4.[2]Hidaka N, Yamanaka Y, Fujita Y, Fukushima K, Wake N. Clinical manifestations of pregnancy in patients with Takayasu arteritis: experience from a single tertiary center. Arch Gynecol Obstet. 2012 Feb;285(2):377–85.Disclosure of Interests:None declared

L'énergie solaire, une alternative durable et non polluante aux combustibles fossiles, gagne en importance grâceaux propriétés améliorées des matériaux. Cette étude propose une approche novatrice pour les matériauxcomposites de récepteur solaire, intégrant une couche d'absorption et un substrat conducteur thermique. Diversespoudres, dont l'AlN, l'α-SiC, le Cu, l'acier inoxydable, le CaO (à l'échelle micronique, submicronique et nanométrique),le β-SiC, le γ-Al2O3 et le noir de carbone, ont été explorées. Des procédés innovants sans solvants et sans traitementthermique ont été introduits pour le mélange et le revêtement des poudres. Les pastilles, produites par frittage àplasma, comprennent de l'AlN avec des additifs CaO, de l'α-SiC avec des additifs CaO et Al2O3, du Cu avec du β-SiC, etde l'acier inoxydable. Le dépôt du matériau absorbeur solaire a utilisé du noir de carbone. Le simulateur solaire auto-construit a évalué l'absorption d'énergie et l'efficacité de transfert de chaleur. La méthode des éléments finis a simuléle transfert de chaleur radiatif et conducteur dans les pastilles poreuses composites. Les formes géométriquesalignées avec les structures des pastilles pour des comparaisons précises. Le Picomix s'est avéré supérieur au broyageà billes traditionnel pour préparer des poudres mélangées, offrant une approche sans solvant et respectueuse del'environnement. Atteignant une conductivité thermique de 135,3 W/m∙K, la pastille d'AlN avec 3 % en poids de nanoCaO à une vitesse de rotation de 5000 tr/min a excellé. Le revêtement à sec de β-SiC par Picomix a efficacement réduitl'oxydation du Cu tout en maintenant une conductivité thermique élevée, présentant une méthode prometteuse detraitement anti-oxydation. L'ajout de 9 % en poids d'Al2O3 et de CaO à l'α-SiC a élevé la conductivité thermique de sapastille à 114 W/m∙K. Sous le flux thermique radiatif élevé du simulateur solaire, les composites AlN-additif aveccouche de carbone et les pastilles α-SiC-additif ont présenté une amélioration de l'absorption d'énergie solaire et dutransfert de chaleur. Les résultats de la modélisation ont souligné l'influence combinée de l'épaisseur, de la porositéet de la conductivité thermique sur le transfert de chaleur des pastilles poreuses. Pour des pastilles d'épaisseurinférieure à 50 mm, une porosité inférieure à 0,3 et une conductivité thermique dépassant 100 W/m∙K, l'efficacité detransfert de chaleur est restée comparable. L'épaisseur de la couche d'absorption solaire a eu un impact significatifsur le taux de transfert de chaleur des pastilles poreuses/composites. La conductivité thermique du matériauabsorbeur solaire a eu peu d'impact sur l'absorption d'énergie solaire et l'efficacité de transfert de chaleur au-delà de50 W/m∙K. Diverses configurations géométriques ont produit des résultats de simulation comparables
Solar energy, a sustainable and non-polluting alternative to fossil fuels, gains momentum with enhanced materialproperties. This study proposes a novel approach for composite solar receiver materials, integrating an absorptionlayer and a thermal conductive substrate. Various powders, including AlN, α-SiC, Cu, stainless steel, CaO (micron,submicron, and nano-scale), β-SiC, γ-Al2O3, and carbon black, were explored. Innovative solvent-free processes andheat-treatment-free techniques were introduced for powder mixing and coating. Pellets, produced by spark plasmasintering, include AlN with CaO additives, α-SiC with CaO and Al2O3 additives, Cu with β-SiC, and stainless steel. Solarabsorber material deposition utilized carbon black. The self-constructed solar simulator assessed energy absorptionand heat transfer efficiency. Finite element method simulated radiative and conductive heat transfer in compositeporous pellets. Geometric shapes aligned with pellet structures for accurate comparisons. The Picomix provedsuperior to traditional ball milling for preparing mixed powders, offering a solvent-free and eco-friendly approach.Achieving a thermal conductivity of 135.3 W/m∙K, the AlN pellet with 3 wt% nano CaO at 5000 rpm rotational speedexceled. Dry-coating β-SiC by Picomix effectively reduced Cu oxidation while maintaining high thermal conductivity,presenting a promising anti-oxidation treatment. Adding 9 wt% Al2O3 and CaO to α-SiC elevated its pellet thermalconductivity to 114 W/m∙K. Under the solar simulator's high radiative heat flux, AlN-additive with carbon layercomposites and α-SiC-additive pellets exhibited enhanced solar energy absorption and heat transfer. Modeling resultsunderscored the combined influence of thickness, porosity, and thermal conductivity on porous pellet heat transfer.For pellets with thickness below 50 mm, porosity less than 0.3, and thermal conductivity surpassing 100 W/m∙K, heattransfer efficiency remained comparable. The solar absorption layer's thickness significantly impacted compositeporous pellet heat transfer rate. Solar absorber material’s thermal conductivity minimally affected solar energyabsorption and heat transfer efficiency beyond 50 W/m∙K. Diverse geometric model configurations yieldedcomparable simulation outcomes

In the past few years’ urban design development has been a topic that in some of Latin America cities such as Medellin, Mexico City and Córdoba, has been evolving under the shadow no longer far from concepts as social innovation and social urbanism, a situation that generates new perspectives and concerns about the impacts that this transformations bring to the cities and its communities. The aim of the collaborative research project was to acknowledge the impacts of urban transformations on five different cities and comparing them to find similarities and differences. A comparative analysis of multiple cases was proposed, along with a methodological triangulation that contained observation, photography analysis and the production of graphics accompanied by interviews in order to arouse an approach to the perceptions of the community residing the space and their affective bonds with it. Inquiring about this process and impacts, and the inhabitants’ relation with their newly transformed space, researchers used graphic research methods that allowed collecting, evaluating and establishing comparative criteria and identifying reiterating impacts caused by urban interventions. Different graphic and visual tools such as drawings, photography and graphic reconstruction were used as a tools to identify the urban and architectural strategies through which a connection between urban space and its inhabitants in each city in order to compare with the other four cities. These tools where used in order to define a recurrent method creating an effect of distance, which increases the effect of designation and shows urban dynamics to articulate submerged realities in opposition with the images created through the visual tools, so a closer relationship between research and representation is made.

This case study is one of ten international case studies developed by the Inter-American Development Bank (IDB), in association with the Korean Research Institute for Human Settlements (KRIHS), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center (GDPC) provided the funding. Medellin launched a series of strategies to become smart city. They are oriented to the citizen, through a series of services that improve their quality of life as they develop capacity and organizational structure in the entities that control mobility, the environment, and safety. In addition, these initiatives have created mechanisms to communicate and interact with citizens in order to promote continuous improvement of smart services.

This case study is one of ten international case studies developed by the Inter-American Development Bank (IDB), in association with the Korean Research Institute for Human Settlements (KRIHS), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center (GDPC) provided the funding. The case of Santander as an object of study in the field of smart cities and as an international reference is known for the widespread deployment of devices, which makes it unique in the world as a testing ground. This, coupled with the diversity of services that are integrating technology throughout, means that today, the city, through its council, the university, and the successful tenderers for municipal services, is participating in more than 15 international projects. The next step, already underway, will be the integration of all smart services (e.g., water supply, solid waste collection, street lighting, and public transportation) into a single smart platform that will allow them to interact with each other and represents a step toward efficiency and smart city management.

This case study is one of ten international studies developed by the Korea Research Institute for Human Settlements (KRIHS), in association with the Inter-American Development Bank (IDB), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. Songdo, as part of Incheon Free Economic Zone, is an iconic new smart city of Korea that hosts international business events and attract IT, biotech, ad R&D facilities. Its smart city initiative began in 2008 and is still ongoing with an aim for completion by 2017. The project is largely divided into six sectors including transport, security, disaster, environment, and citizen interaction while other services related to home, business, education, health and car are also being developed. Specialized service in Songdo includes smart bike services, criminal vehicle tracking and monitoring unusual activities through motion detecting technology while Integrated Operation and Control Center (IOCC) readily facilitates collaboration between various agencies and citizen engagement. Songdo smart city initiative is managed by Incheon U-city Corporation, a private- public partnership in order to secure funding for system operation through effective business model.

This case study is one of ten international studies developed by the Korea Research Institute for Human Settlements (KRIHS), in association with the Inter-American Development Bank (IDB), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. As an international destination for theme parks, sporting events and conventions, Orlando approaches the smart city operation through Orlando Operations Center (OOC), an integrated facility established in 2001 by the Mayor after the 1997 hurricane. The major features of the integrated operation include the sharing of fiber optic networks and CCTV cameras, and close cooperation between transport, police and fire departments for road, criminal and disaster incident, and the emergency operation center within the OOC taking the lead in case of special event management and large-scale natural disasters. Along with the OOC, the city hall also utilizes smart city functions such as red light violation enforcement through detectors, bus management through AVL technology, GPS garbage truck tracking, and GIS water management. Orlando has experienced significant benefits in terms of shortened decision-making and response time, reduced operation cost, and improved environmental impacts, as well as enhanced service quality and communication with citizen.

This case study is one of ten international studies developed by the Korea Research Institute for Human Settlements (KRIHS), in association with the Inter-American Development Bank (IDB), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. Anyang, a 600,000 population city near Seoul is developing international recognition on its smart city project that has been implemented incrementally since 2003. This initiative began with the Bus Information System to enhance citizen's convenience at first, and has been expanding its domain into wider Intelligent Transport System as well as crime and disaster prevention in an integrated manner. Anyang is evaluated as a benchmark for smart city with a 2012 Presidential Award in Korea and receives large number of international visits. Anyang's Integrated Operation and Control Center (IOCC) acts as the platform that gathers, analyzes and distributes information for mobility, disasters management and crime. Anyang is currently utilizing big data for policy development and is continuing its endeavor to expand its smart city services into areas such as waste and air quality management. Anyang's success factors are the government officials' continuous willingness towards service development and the establishment of cooperation system among the smart city-related organizations.

This case study is one of ten international studies developed by the Korea Research Institute for Human Settlements (KRIHS), in association with the Inter-American Development Bank (IDB), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. Namyangju, a city of 650,000 populations in Korea has been promoting smart city project since 2008 as a response to recent growth of population, increased share of transport and crime rate. Namyangju offers various civic services especially via smartphone such as customized real-time road CCTV images, traffic flow and incident information, as well as application for senior resident protection. Namyangju is also equipped with security system at bus stops and multifunctional "smart pole", which combines street light, CCTV, and traffic signal controller to promote efficient use of roadside facility. The city promotes local economy through online market system making use of its local organic farms and actively utilizes bus stops and roadside VMS in attracting advertisement to raise regular profit. Namyangju is in the process of installing 101km fiber-optic network and plans to complete the construction of Integrated Operation and Control Center (IOCC) by 2016. The city's current focus is on citizen interaction and further business model development.

This case study is one of ten international studies developed by the Inter-American Development Bank (IDB), in association with the Korean Research Institute for Human Settlements (KRIHS), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. The case study includes the experience of the city of Rio de Janeiro in smart city initiatives, focusing mainly on Rio Operations Center Project-COR. The methodology was based on field research, site visits, publications, and interviews held with representatives of local government of the City of Rio de Janeiro. The report addresses the city backdrop, the main urban challenges, the history of digital initiatives, and their evolution over time. For the Rio Operations Center, the general model of participation, organizational aspects, the keys functions, the monitored events, the mechanisms for access, dissemination of information, and the decision-making process are described, as well as the typologies of existing systems and their integration with COR. The study concludes that it is a successful model with a high degree of maturity, and that sharing the experience of Rio de Janeiro with other cities is very important. However, the model needs to continue evolving and rely on strong institutional support so that Rio de Janeiro's population can increasingly enjoy the benefits of technological innovations applied to the city's daily challenges.

This case study is one of ten international studies developed by the Korea Research Institute for Human Settlements (KRIHS), in association with the Inter-American Development Bank (IDB), for the cities of Anyang, Medellin, Namyangju, Orlando, Pangyo, Rio de Janeiro, Santander, Singapore, Songdo, and Tel Aviv. At the IDB, the Competitiveness and Innovation Division (CTI), the Fiscal and Municipal Management Division (FMM), and the Emerging and Sustainable Cities Initiative (ESCI) coordinated the study. This project was part of technical cooperation ME-T1254, financed by the Knowledge Partnership Korean Fund for Technology and Innovation of the Republic of Korea. At KRIHS, the National Infrastructure Research Division coordinated the project and the Global Development Partnership Center provided the funding. Pangyo is a new city built from 2003 onwards near Seoul with a vision to become the Silicon Valley of Korea. Approximately 75 million USD of the development gain was allocated to smart city implementation, which took place in one shot within 3-4 years along with the city construction. Pangyo classifies its services into smart portal, facility management, security, disaster, and environment. Interesting aspects of Pangyo are the use of smart kiosk media boards for information provision and real-time management of street lights and waterworks. Key advantage of Pangyo is the low concern for investment overlap from simultaneous development of new city and smart city system, which also enabled high degree of integration of various functions in a spacious smart city operation center as well as utilization of fiber-optic network. Pangyo is currently making various attempts to generate revenue to cover maintenance cost through attracting advertisement on media boards and kiosks, and providing education contents to citizens at low charge.

Creative industries are considered highly innovative and productive, constituting an important driver of economic change. For high-income countries, several studies discuss the positive spillovers of creative industries for the local economy, for instance by attracting creative workers, which can benet entrepreneurs and workers in other industries. Like many other activities, creative industries are likely to dier in low- and middle-income countries compared to high-income countries. Moreover, the existing evidence is based on correlations between variables likely to be endogenous. This paper contributes to the literature on the role of creative industries in driving economic change in two main ways. First, we make a rst attempt to control for endogeneity and identify the impact of creative industries on local economies. Second, we report evidence for a middle-income country. Using granular employment data, we study the agglomeration patterns of creative industries across Colombian cities between 2008 and 2017. Exploiting the co-location of creative industries with other industries, we estimate the relation between employment growth in creative and non-creative industries in the same city. Using a shift-share instrumental variable approach, we estimate the multiplier eect of employment growth in creative industries on the employment growth in the rest of the economy. Creative industries represented between 2.7 and 3.3 percent of Colombian employment in 2008 and 2017. We nd that creative industries agglomerate mainly in three large cities (Bogota, Medelln, and Cartagena) and in a few smaller cities. Such agglomeration is positively related to an increase in the employment of non-creative services industries. For a positive causal relation to materialize, creative industries should have a larger size or be more connected to other economic sectors. However, after controlling for endogeneity, we nd no signicant impact of an increase of creative industries employment on employment growth in other industries.