Territórios de fluxos e estruturação da rede de cidades na fronteira sulbrasileira

O presente artigo objetiva discutir o papel da rede de cidades na configuração de fluxos de mercadorias em espaços fronteiriços, utilizando como estudo de caso a fronteira sul-brasileira com o Uruguai e a Argentina. Rede de cidades é aqui entendida como conjunto de centros urbanos articulados entre si, com especificidades histórico-espaciais. Verificam-se duas formas principais de integração internacional: de um lado, a fronteira seca Brasil-Uruguai, que apresenta forte potencialidade de articulação através de uma rede urbana mais ramificada e de suas cidades gêmeas historicamente constituídas com grandes investimentos em free shops; de outro lado, a fronteira Brasil-Argentina esbarra na ausência de uma maior densidade de cidades e de eixos viários do lado argentino, mas ainda assim definindo pontos estratégicos de passagem entre os dois países. Essa rede de cidades conforma uma importante estrutura de passagem de fluxos de mercadorias do MERCOSUL. A metodologia adotada apoia-se na identificação do papel de centros nodais estratégicos (agregadores e difusores de dinâmicas socioespaciais) na rede regional de cidades, segundo as conexões viárias e localização em relação aos países vizinhos. Embora tenha essa relevância supranacional na estruturação dos fluxos de mercadorias, essa fronteira tem pouca visibilidade nas politicas nacionais dos países envolvidos.Área temática 4: Ciudad, Territorio y Paisaje. Gestión - Eje InvestigaciónFacultad de Arquitectura y Urbanism

Territórios de fluxos e estruturação da rede de cidades na fronteira sulbrasileira

O presente artigo objetiva discutir o papel da rede de cidades na configuração de fluxos de mercadorias em espaços fronteiriços, utilizando como estudo de caso a fronteira sul-brasileira com o Uruguai e a Argentina. Rede de cidades é aqui entendida como conjunto de centros urbanos articulados entre si, com especificidades histórico-espaciais. Verificam-se duas formas principais de integração internacional: de um lado, a fronteira seca Brasil-Uruguai, que apresenta forte potencialidade de articulação através de uma rede urbana mais ramificada e de suas cidades gêmeas historicamente constituídas com grandes investimentos em free shops; de outro lado, a fronteira Brasil-Argentina esbarra na ausência de uma maior densidade de cidades e de eixos viários do lado argentino, mas ainda assim definindo pontos estratégicos de passagem entre os dois países. Essa rede de cidades conforma uma importante estrutura de passagem de fluxos de mercadorias do MERCOSUL. A metodologia adotada apoia-se na identificação do papel de centros nodais estratégicos (agregadores e difusores de dinâmicas socioespaciais) na rede regional de cidades, segundo as conexões viárias e localização em relação aos países vizinhos. Embora tenha essa relevância supranacional na estruturação dos fluxos de mercadorias, essa fronteira tem pouca visibilidade nas politicas nacionais dos países envolvidos.Área temática 4: Ciudad, Territorio y Paisaje. Gestión - Eje InvestigaciónFacultad de Arquitectura y Urbanism

Territórios de fluxos e estruturação da rede de cidades na fronteira sulbrasileira

O presente artigo objetiva discutir o papel da rede de cidades na configuração de fluxos de mercadorias em espaços fronteiriços, utilizando como estudo de caso a fronteira sul-brasileira com o Uruguai e a Argentina. Rede de cidades é aqui entendida como conjunto de centros urbanos articulados entre si, com especificidades histórico-espaciais. Verificam-se duas formas principais de integração internacional: de um lado, a fronteira seca Brasil-Uruguai, que apresenta forte potencialidade de articulação através de uma rede urbana mais ramificada e de suas cidades gêmeas historicamente constituídas com grandes investimentos em free shops; de outro lado, a fronteira Brasil-Argentina esbarra na ausência de uma maior densidade de cidades e de eixos viários do lado argentino, mas ainda assim definindo pontos estratégicos de passagem entre os dois países. Essa rede de cidades conforma uma importante estrutura de passagem de fluxos de mercadorias do MERCOSUL. A metodologia adotada apoia-se na identificação do papel de centros nodais estratégicos (agregadores e difusores de dinâmicas socioespaciais) na rede regional de cidades, segundo as conexões viárias e localização em relação aos países vizinhos. Embora tenha essa relevância supranacional na estruturação dos fluxos de mercadorias, essa fronteira tem pouca visibilidade nas politicas nacionais dos países envolvidos.Área temática 4: Ciudad, Territorio y Paisaje. Gestión - Eje InvestigaciónFacultad de Arquitectura y Urbanism

Lateral variability in strain along a mass-transport deposit (MTD) toewall: a case study from the Makassar Strait, offshore Indonesia

Contractional features characterise the toe domain of mass-transport deposits (MTDs). Their frontal geometry is typically classified as frontally-confined or frontally-emergent. However, it remains unclear how frontal emplacement style and contractional strain within an MTD can vary along strike. We use bathymetry and 3D seismic reflection data to investigate lateral variability of frontal emplacement and strain within the toe domain of the Haya Slide in the Makassar Strait. The slide originated from an anticline flank collapse, and the toe domain is characterised by a radial fold-and-thrust belt that reflects southwestwards emplacement. The frontal geometry of the slide changes laterally. In the S, it is frontally-confined, associated with a deep, c. 200 mbsf, and planar basal shear surface. The frontal geometry gradually changes to frontally-emergent in the W, associated with a shallow, c. 120 mbsf, and NE-dipping, c. 3o, basal shear surface. Strain analysis shows c. 8-14% shortening, with cumulative throw of the thrusts that increases along strike westwards from c. 20-40 to c. 40-80 m. We show that even minor horizontal translation of MTDs (c. 1 km) can result in marked lateral variability in frontal geometry and strain within the failed body, which may influence their seal potential in petroleum systems

Transferrin changes in haemodialysed patients

Transferrin (Tf) is a glycoprotein responsible for iron transport in the human body. Physiologically in reaction with Concanavalin A, Tf occurs in four distinct variants Tf1, Tf2, Tf3 (apo-Tf) and Tf4. It was reported recently that Tf is changing, particularly during acute phase response, taking place among others in end-stage renal disease. In this study, we wanted to find the answer to three main questions: firstly, how Tf is changing in patients treated with maintenance haemodialysis (mHD), secondly, whether there are any Tf changes in the course of mHD treatment, and thirdly, what factors can affect Tf microheterogeneity in these patients. Studies were performed on 80 haemodialysed patients and 21 healthy volunteers. The Tf concentration was determined by the rocket immunoelectrophoresis, and its microheterogeneity was assessed by the ConA crossed immunoaffinity electrophoresis. During the annual observation of the distribution of the Tf variants, we have found both changes of the percentage contents of all Tf variants in the whole Tf concentration and a significant decrease in Tf2, Tf3 and Tf4 serum concentrations. Moreover, we found that decrease in the renal function, duration of mHD, and inflammation may contribute to these above-mentioned changes, which are probably the factors that should be taken into account when explaining the mechanisms of persistence of anaemia in haemodialysed patients

Evaluation of the local site effects in the upper and middle Aterno valley

In the months following the April 6th, 2009, L’Aquila earthquake, several Italian and foreign research institutions installed dozens of seismic stations to monitor more than 100 localities with the aim of studying the local site effects in the epicentral area (upper and middle Aterno valley). The stations (accelerometers and velocimeters) have been deployed inside or very close to the inhabited areas. Among the investigated sites there are Onna, where almost the totality of the buildings collapsed, and the historic centre of L’Aquila, both towns suffering many casualties. The preliminary results for the examined sites show an extreme variability of ground motion and significant amplification for the most damaged localities.In press4.1. Metodologie sismologiche per l'ingegneria sismicaN/A or not JCRope

Evaluation of site effects in the Aterno river valley (Central Italy) from aftershocks of the 2009 L'Aquila earthquake

A temporary network of 33 seismic stations was deployed in the area struck by the 6th April 2009, Mw 6.3, L’Aquila earthquake (central Italy), with the aim to investigate the site amplification within the Aterno river Valley. The seismograms of 18 earthquakes recorded by 14 of the 33 stations were used to evaluate the average horizontal to vertical spectral ratio (HVSR) for each site and the standard horizontal spectral ratio (SSR) between a site and a reference station. The obtained results have been compared to the geological and geophysical information in order to explain the resonance frequencies and the amplification levels with respect to surface geology of the valley. The result indicate that there is no uniform pattern of amplification, due to the complex geologic setting, as the thickness and degree of cementation of the deposits is highly variable. As consequence, a large number of the local site response is observed, therefore it is very difficult to elaborate a unique model that can explain such a variability of the amplification.Published697-7154.1. Metodologie sismologiche per l'ingegneria sismicaJCR Journalpartially_ope

Effects of 02 Enrichment on the Preformance of a Low NOx Burner

The trend in the reheating technology towards increased production rates, improved product quality and expended assortment has resulted in revival of interest in the use of oxygen. One method to introduce oxygen into combustion process is by oxygen enrichment of combustion air. This technique reduces the amount of nitrogen entering the furnace and increases the flame temperature, resulting in improved combustion efficiency and increased furnace productivity

Flammable mixture formation and mixing rates of transient gaseous fuel jet with air in tumbling or swirling motion

In this study the effects of angular momentum (barrel and axial swirl) on flammable mixture formation and mixing rate between chamber air and transient gaseous jets of hydrogen and methane were numerically investigated in several geometric configurations; in fixed volume cubic and cylindrical chambers, and in a variable volume cylindrical chamber with moving piston. The magnitude of the momentum, injection duration, and injection velocity are the main parameters whose effects were investigated. In the cylindrical chamber with mowing piston dissipation of a bulk air motion vortex, and the angular momentum decay during compression were also studied The numerical simulations were carried out with the use of KIVA3V code modified for gaseous injection with a standard k-e model for turbulence. It was found that hydrogen jet and air mixing under application of angular momentum lead to fast formation of flammable mixture, with the mixing rates several times larger than those for methane jet. Also dynamics of the hydrogen mixing as illustrated by the mixing rate curves is markedly different from those for methane with the same magnitude of angular momentum. The mixing rate curves for hydrogen feature one strong local maximum at time which is half or less of the hydrogen jet injection duration time. Mixing of methane jet with air at all conditions resembles that of hydrogen jet mixing with air at zero or lower levels of angular momentum