1,720,992 research outputs found
Urban real estate values and ecosystem disservices: An estimate model based on regression analysis
No full textIt is well known that production activities are often the cause of ecosystem disservices. Such disservices can have serious effects on urban real estate values. But how much is the contraction that the market values of housing suffer due to the polluting emissions produced by a medium-sized foundry? And how large is the urban area within which buildings are depreciated? With this research we intend to give an answer. To this aim, with specific regard to urban apartments free from contractual constraints, the use of multiple regression analysis makes it possible to obtain a function that explains the real estate value through multiple variables, one of which is representative of the ecosystem disservice. The study reveals that the urban area that suffers from the negative effects of polluting industrial activities on property prices can be extensive. On the other hand, the contractions of real estate values can even reach 43%. These results, for the first time expressed in quantitative terms, must direct towards urban planning interventions, and more generally of economic policy, aimed at minimizing the environmental impacts of production activities. This is not only for the essential obligations to protect environment and human health, but also in relation to the direct economic implications of the decrease in the value of real estate
Brachial artery aneurysm after hemodialysis fistula ligation: Case reports and review of literature
Full text linkIntroduction: Brachial artery aneurysm (BAA) following long-standing arteriovenous fistula (AVF) ligation after renal transplantation is odd. Case presentation: Two cases of brachial artery aneurysm treated with bypass (a saphenous vein graft and a PTFE graft). In the first patient no complications were recorded whereas an infection was diagnosed after 6 months from the procedure in the second treatment. Clinical discussion: Multiple factors activated by stress on the vessel wall followed by fistula ligation are the cause of vascular remodeling of the three layers making up the wall with possible evolution in aneurysmatic lesions. In literature the gold standard for this lesion is the surgical approach, only one endovascular procedure is reported. The traditional surgical approach uses the autologous vein or prosthetic PTFE grafts. Conclusion: Brachial artery aneurysm is a complication that affects patients undergoing renal transplantation who have already undergone AVF ligation. In our experience autologous vein graft represented the best solution
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Carry Trade with Maintained Currencies - A Risk and Return Analysis for the Egyptian Pound
Full text linkThe forward premium puzzle in the exchange rate market, resulting from the deviation and failure of interest rate parity, has awakened the interest of speculators to perform carry trade activities. Across literature the main risk associated and measured for carry trade has been the exchange rate risk and crash risk related to the relevant currencies used. But within the literature, the influence of maintained currencies on the carry trade results has not yet been covered. This paper analyzes the potential performance and the risk of carry trade strategies within a maintained exchange rate regime. For this analysis an empirical study of carry trade strategies applied between the EGP and other currencies has been used and compared to those with the USD as an example for a maintained exchange rate. Our risk and return analysis clearly shows a combination of high return and low risk for the maintained currency carry trade.Carry Trade Performance, Uncovered Interest Parity, Maintained Exchange Rates, Value at Risk
Functionalized Enzyme-Responsive Biomaterials to Model Tissue Stiffening in vitro
Full text linkThe mechanical properties of the cellular microenvironment play a crucial role in modulating cell function, and many pathophysiological processes are accompanied by variations in extracellular matrix (ECM) stiffness. Lysyl oxidase (LOx) is one of the enzymes involved in several ECM-stiffening processes. Here, we engineered poly(ethylene glycol) (PEG)-based hydrogels with controlled mechanical properties in the range typical of soft tissues. These hydrogels were functionalized featuring free primary amines, which allows an additional chemical LOx-responsive behavior with increase in crosslinks and hydrogel elastic modulus, mimicking biological ECM-stiffening mechanisms. Hydrogels with elastic moduli in the range of 0.5–4 kPa were obtained after a first photopolymerization step. The increase in elastic modulus of the functionalized and enzyme-responsive hydrogels was also characterized after the second-step enzymatic reaction, recording an increase in hydrogel stiffness up to 0.5 kPa after incubation with LOx. Finally, hydrogel precursors containing HepG2 (bioinks) were used to form three-dimensional (3D) in vitro models to mimic hepatic tissue and test PEG-based hydrogel biocompatibility. Hepatic functional markers were measured up to 7 days of culture, suggesting further use of such 3D models to study cell mechanobiology and response to dynamic variation of hydrogels stiffness. The results show that the functionalized hydrogels presented in this work match the mechanical properties of soft tissues, allow dynamic variations of hydrogel stiffness, and can be used to mimic changes in the microenvironment properties of soft tissues typical of inflammation and pathological changes at early stages (e.g., fibrosis, cancer)
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