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      • KCI등재

        Seeing urban regeneration through an institutional lens: toward a new contextualism

        Raul P. Lejano 서울시립대학교 도시과학연구원 2015 도시과학국제저널 Vol.19 No.3

        One of the ‘tools’ of urban regeneration is discourse – that is, the social construction of new strategies for uplifting parts of the city. In this article, we take an institutionalist approach and contrast textualist urban development regimes from contextualist ones, building on recent theoretical advances in institutional contextualism. A review of the institutional literature underscores the utility of this lens in analysing the discourse and practice of urban regeneration. We demonstrate the contrast between text and context in practice and point to a new contextualism in urban planning and design. Drawing upon examples from Hong Kong, we discuss particular challenges, such as textual autopoiesis, for regenerative urban design.

      • KCI등재

        The influence of saliva pH value on the retention and durability of bar-clip attachments

        Raul Ustrell,Ana Cristina Braga,Jose Manuel MendeTomas Escuin,Carlos Aroso,Antonio Sergio Silva 대한치과보철학회 2015 The Journal of Advanced Prosthodontics Vol.7 No.1

        PURPOSE The aim of this study was to compare the durability and retention of 4 types of attachments placed over computer aided design/computer aided manufacturing (CAD/CAM) titanium bars when subjected to different pH conditions. MATERIALS AND METHODS Four commercially available attachments were investigated: Hader Yellow, Hader Red, Ackerman Gold and Ackerman Stainless Steel. These attachments and Ackerman CAD/CAM titanium bars were placed in 2 vessels containing different artificial saliva solutions (pH 7/pH 4) at 37℃ for one month to simulate corrosion conditions, and they were then subjected to mechanical testing (5400 cycles of insertion and removal). RESULTS The results revealed that there were significant differences in the average values of insertion/removal force due to the pH (F (1, 24)=9.207, P<.05) and the type of attachment (F (3, 24)=11.742, P<.05). CONCLUSION More acidic pH values were found to have a negative influence on the retention capacity of the attachments.

      • EMPRESAS TRANSNACIONALES Y EVOLUCION DE LA INTEGRACION COMERCIAL EN AMERICA LATINA: 1995-2008

        Raul Vazquez Lopez Institute of Iberoamerican Studies Pusan Universit 2011 International Journal of Latin American Studies Vol.1 No.1

        This article assesses the commerce evolution among the most important Latin American countries in the 1995-2008 periods, using as reference the existing theoretical debate on economic integration literature in terms of static versus dynamic competitive advantages. It is highlighted in particular, the historical role of the transnational enterprises as a barrier to build a project configured according to the ECLA (Economic Commission for Latin America ?CEPAL is the Spanish acronym?) theoretical propositions. Our main findings shows that the consolidation of global value chains promoted by large corporations accentuates the existing asymmetries between the nations and opposes to the development of a real complementarity among the productive structures of the Latin American economies. We also characterize the growing commercial deficit on service trade of the stronger economies as a new form of dependence. The article concludes then, by estimating the viability of an alternative economic integration project for the region.

      • KCI등재

        Phase doppler measurements: system set-up optimization for characterization of a diesel nozzle

        Raul Payri,Lucio Araneo,Joseph Shakal,Vlad Soare 대한기계학회 2008 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.22 No.8

        A commercial phase Doppler system was set up, optimized and used to measure the time resolved characteristics of the droplets inside a diesel spray. The purpose of this work was to understand exactly the influence of each system parameter, and to find the best setup enabling measurements in the spray zones that are densest and closest to the injector. Parametric studies were performed to gain an understanding of the particle density limits of the system and their dependence on the system parameters. Then the diesel spray produced by a single-hole injector was measured, with the fuel pressure ranging from 300 to 1300 bar and gas density in the test chamber ranging from ambient conditions to 40 kg/m3. The optic parameters (beam waist size, lenses focal length) were chosen to the best expected values allowed by the optical stand-off of the spray enclosure. The receiver slit width, which was found to have a dramatic effect on the detection of droplets during the injection main period, was tested in the range from 100 μm to 25 μm. Tests were carried out with two different slit lengths, namely 1 mm and 50 μm, with results indicating minimal effect on performance. PMT voltage (gain) was held to a moderately low value between 400 and 500 V and the laser power between 400 and 800 mW in the green line. An optimum burst threshold was found to obtain the best quality data regardless of signal background level, which varies greatly in high-density pulsed sprays. In the end, a set of results from the complete nozzle characterization in various conditions is presented in order to show the practical application of the optimization study and to provide some means of appreciating the results accuracy. The results obtained were also used to show that the gas-jet theory can be used to predict if PDPA measurement are possible in a given experimental situation.

      • KCI등재

        Severe Weakness of Hip Flexor after Iliopsoas Tenotomy: Two Case Reports

        Raul Torres-Eguia,LE Betancourt,Jesus Mas Martinez,Javier Sanz-Reig 대한고관절학회 2020 Hip and Pelvis Vol.32 No.2

        Hip arthroscopies are becoming a standard surgical technique, with psoas tenotomy being a relatively common procedure during this operation. A 37-year-old male and a 42-year-old female with internal hip snapping came to our department. Arthroscopic partial psoas tenotomy of the iliopsoas portion of the conjoint tendon was performed, but its results were bad. Patients reported preoperative unilateral low-back pain and weakness when flexing the hip. Unilateral atrophy of the lumbar psoas and fatty multifidus were detected in both cases. Patients at risk of unsatisfactory outcomes after psoas tenotomy should be ideally identified prior to surgery. Warning symptoms, physical examination, and imaging studies should be considered to avoid unsatisfactory results.

      • KCI등재

        Brazil & China : Partners or Competitors? Designing Strategic Alliances in the Age of Uncertainty

        Raul Gouvea,Manuel Montoya 한국라틴아메리카학회 2013 라틴아메리카연구 Vol.26 No.1

        Brazil and China are rapidly developing a strategic alliance based on the two economies’ short and long-term strategic goals. This paper assesses the impact of China on the Brazilian economy and discusses the challenges and opportunities permeating this strategic relationship. This case study suggests that Chinese and Brazilian relations represent a paradigm shift in our conventional understandings of political and economic behavior. More specifically, it suggests that the growing interdependence between big emerging economies no longer requires for large Western economies to mediate the economic exchanges that shape the global agenda. Furthermore, we suggest that in spite of very strongly perceived competitive behavior, the increased interaction between these two nations and the institutionalization of economic ventures is compelling these nations to imagine themselves increasingly as partners in a newly conceived, socially distinct, transnational dimension. To explore the significance of this behavior, we employ perspectives on international trade and globalization, including a brief CAGE analysis, to characterize Sino-Brazilian relations in the context of the 21st century global political economy.

      • KCI등재

        Purchasing Pattern Analysis by Business Fluctuations

        Raul Moretti 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.4

        In 2008, the global economic crisis that came from the bankruptcy of Lehman Brothers had a big impact all over the world and in Korea's overall economy. The depression of the economy brought about a more distinctive income polarization and also changed customer's purchasing patterns. The collapse of the world's largest investment bank had a domino effect in trade across countries, industries, companies, and all the way down to the consumer. Korea, whose economy is intricately connected with the U.S. economy, also saw sharp drops in stock prices as a result of dropping consumer confidence in the United States. The effects escaped the confines of the financial sector to consumer's everyday lives. Nowadays, many evaluation institutes such as Moodys' and S&P state that the economy has somewhat recovered. However, there still remain dangerous instabilities caused by the European and Chinese economies. In this paper, we investigate how customer's purchasing patterns are changed by business fluctuations resulting from the financial stresses caused in part from the Lehman bankruptcy. To do this, we use the MCR (Media & Customer Research) dataset which is developed by Kobaco (Korea Broadcast Advertising Corporation) each year and fit the data to a factor analysis which is one of the well established multivariate statistical methods. A questionnaire that determines purchasing behaviors is condensed into two factors: frugal buying and impulse buying. I predict that purchasing patterns will have been affected by a decline in the economy, especially in 2008, which was considered to have suffered considerably after some high profile bankruptcies, most notably Lehman Brothers.

      • KCI등재

        A Study of Broline-Crowe-Isaacs Matrices of Polygon Dissections

        Raul Felipe 경북대학교 자연과학대학 수학과 2022 Kyungpook mathematical journal Vol.62 No.2

        The work realized by the authors of [4], [5] and [6] associates a non-negative matrix with positive integers entries to each dissection of a polygon. In the particular case of triangulations, these matrices called BCI-matrices here contain valuable information of their frieze patterns, a concept introduced by Coxeter and Conway. This paper is con cerned with the algebraic manipulation and properties of these matrices which are derived from operations acting on dissections.

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