bluuebunny/crossref_metadata_2025 huggingface dataset:
Polyurethane Insulation as a Method of Hydrate Control
Authors: Robinson F.J. , Carlson P.C.
Published: June 2014

This paper deals with the method employed by Gulf Oil Canada Limited toprevent hydrate formation in pipelining wet sour gas by using apolyurethane-insulated line. The feasibility of using polyurethane insulationis compared to other methods of hydrate control. The design of and handlingproblems associated with polyurethane-insulated line and the installationtechniques devised and successfully employed to cope with the relativelyfragile insulation are discussed. Finally, the actual field performance of theinsulated pipeline is reviewed, and data are presented to substantiate thedesign parameters and predicted performance.

INTRODUCTION

SINCE 1963, The British American Oil Company Limited (now Gulf Oil Canada Ltd.), as operator of Lookout Butte Unit No. 1, has operated a gas cyclingscheme in an attempt to enhance the recovery of pentanes plus from the Rundleformation in the Lookout Butte field in southern Alberta. Permission wassubsequently granted by the Alberta Oil and Gas Conservation Board to terminategas cycling on November 1, 1967, and to produce the reservoir at a rate ofapproximately 90 MMscf/D. The nearest gas plant capable of handling thisproduction is the B.A. Pincher Creek Gas Plant, located in the Pincher Creekfield approximately 14 miles north of thee Lookout Butte field. The relativelocation of these two fields is shown in Figure 1. It became necessary, therefore, to move approximately 90 MMscf/D of sour gas, condensate and water14 miles to the Pincher Creek plant by pipeline.
Schedule and Cost Control in Dwelling Construction Using Control Charts
Authors: Marrero Madelyn , Fonseca Antonio , Falcon Raúl , Ramirez-de-Arellano Antonio
Published: June 2014

Methods to monitor the schedule and to control cost in dwelling construction projects are numerous and varied
but commonly constitute an obstacle to a fast and agile response by construction managers, whose decisions require information
to be comprehensive and summarized. A simple model to monitor these projects is proposed that can easily be
implemented within control systems that are already in place. For the first time, process control charts are combined with
cost control in dwelling construction in order to prevent overruns in terms of time and/or cost. The model facilitates the
production supervision of construction contracts by regularly providing information on the work completed and the incurred
cost of the production processes per period, through charting and/or summarizing this information in a manner consistent
with statistical control charts. Finally, the manager can easily identify those processes which are off target by consulting
control charts.
Multiple climate shifts in the Southern Hemisphere over the past three centuries based on central Antarctic snow pits and core studies
Authors: Ekaykin A.A. , Kozachek A.V. , Lipenkov V.Ya. , Shibaev Yu.A.
Published: June 2014

Based on the results of geochemical and glaciological investigations in snow pits and shallow cores, regional stack series of air temperature in central Antarctica (in the southern part of Vostok Subglacial Lake) were obtained, covering the last 350 years. It is shown that this parameter varied quasi-periodically with a wavelength of 30–50 years. The correlation of the newly obtained record with the circulation indices of the Southern Hemisphere (SH) shows that the central Antarctic climate is mainly governed by the type of circulation in the SH: under conditions of zonal circulation, negative anomalies of temperature and precipitation rate are observed, whereas the sign of the anomalies is positive during meridional circulation. In the 1970s the sign of the relationship between many climatic parameters changed, which is likely related to the rearrangement of the climatic system of the SH. The data suggest that during the past 350 years such events have taken place at least five times. The stable water isotope content of the central Antarctic snow is governed by the summer temperature rather than the mean annual temperature, which is interpreted as the influence of ‘postdepositional’ effects.
THERMAL AND STRUCTURAL ANALYSIS OF RCC DOUBLE-CURVATURE ARCH DAM
Authors: Abdulrazeg Aeid Ali , Noorzaei Jamaloddin , Jaafar Mohamed Saleh , Khanehzaei Parvin , Mohamed Thamer Ahmed
Published: June 2014

This paper focuses on the development, verification and application of a three-dimensional finite element code for coupled thermal and structural analysis of roller compacted concrete arch dams. The Karun III Arch dam located on Karun River, Iran, which was originally designed as a conventional concrete arch dam, has been taken for the purpose of verification of the finite element code. In this study, RCC technology has been ascertained as an alternative method to reduce the cost of the project and make it competitive. A numerical procedure to simulate the construction process of RCC arch dams is presented. It takes into account the more relevant features of the behavior of concrete such as hydration, ageing and creep. A viscoelastic model, including ageing effects and thermal dependent properties is adopted for the concrete. The different isothermal temperature influence on creep and elastic modulus is taken into account by the maturity concept. Crack index is used to assess the occurrence of crack and evaluate the level of safety of the dam. This study demonstrates that, high tensile stress concentration has been observed at the lower part and the abutment boundaries of the dam.
AN IMPROVED APPROACH TO THE SUBCONTRACTING PROCUREMENT PROCESS IN A LEAN CONSTRUCTION SETTING
Authors: Yin Samuel Yen-Liang , Tserng H. Ping , Toong Shih Ning , Ngo Thanh Long
Published: June 2014

The subcontracting procurement process is one of the most important issues impacting the costs of engineering projects and construction projects, in particular. Traditional procedures of subcontracting procurement tend to limit the opportunities for price negotiation and cooperative relationships between contractors and neglect potential issues such as engineering interface, construction risk, and waste. Based on case studies of construction projects, we propose a “lean” subcontracting procurement process (LSPP) drawing from lean construction theory. The process consists of a novel Seven-Arrangement operation plan and four types of standard operating flows. Not only does the proposed LSPP help sub-contractors eliminate various types of waste in construction projects, it also establishes a common information platform and cooperative environment that help participating contractors understand the work emphasis of each operation and the whole operation in sequence. As a result, the relationships between participating contractors become cooperative, potential risks in construction projects can be discovered early, and profits are shared between contractors. Thus, this process allows contractors to obtain long-term benefits.
LABORATORY STUDY ON THE INFLUENCE OF CASTING ON PROPERTIES OF ULTRA-HIGH PERFORMANCE FIBRE REINFORCED CONCRETE (UHPFRC) SPECIMENS
Authors: Zofka Adam , Paliukaitė Miglė , Vaitkus Audrius , Maliszewska Dominika , Josen Ramandeep , Bernier Alexander
Published: June 2014

This paper presents a study on the effects of casting procedure and resulting fibre orientation on the properties of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). To investigate the impact of fibre orientation in the UHPFRC specimens, three approaches were employed. First, densities were measured from the top, middle and bottom zones of the cylinders to observe physical changes as the function of cylinder height. Secondly, two engineering fracture tests were performed in both compression and tension, and a comparison of fracture energies was conducted between different cylinder zones. While previous studies have explored the influence of steel fibres on the UHPFRC performance, the Semi-Circular Bending (SCB) and Disc Compact Tension (DCT) experimental setups have not yet been used in the UHPFRC fracture testing. Lastly, samples from different zones were scanned using X-ray computer tomography (X-ray CT). Both visual and digital image analysis of the X-ray scans were conducted in order to observe fibre orientation pattern changes within different zones. Although density calculations showed insignificant differences between different zones, fracture testing exhibited significant differences through the testing process as well as through fracture energy computations. Furthermore, X-ray CT demonstrated considerable differences in spatial fibre orientation with respect to two uniquely defined angles.
IDENTIFICATION AND EVALUATION OF THE CRITICAL SUCCESS FACTORS FOR CONSTRUCTION PROJECTS IN LITHUANIA: AHP APPROACH
Authors: Gudienė Neringa , Banaitis Audrius , Podvezko Valentinas , Banaitienė Nerija
Published: June 2014

This paper proposes the Analytic Hierarchy Process (AHP) as a tool to rank different critical success factors (CSFs) for construction projects in Lithuania. Considering the current lack of understanding of CSFs within the local context, this study is one of the first attempts to gain an understanding of the CSFs in the local industry. Our study revealed that, for construction projects in Lithuania, clear and realistic project goals, project planning, the project manager's competence, relevant past experience of the project management/team, the competence of the project management/team, clear and precise goals/objectives of the client, the project's value, the project's complexity and uniqueness, the project manager's experience, and the client's ability to make timely decisions are the top-ranking CSFs. In view of these findings, the study highlighted the key areas for successful implementation of construction projects in Lithuania.
THE 20TH ANNIVERSARY OF THE JOURNAL: EDITOR'S INTRODUCTION
Authors: Zavadskas Edmundas Kazimieras , Antuchevičienė Jurgita
Published: June 2014

„The 20th anniversary of the journal: Editor's introduction" Journal of Civil Engineering and Management, 20(3), p. 309-310
Pharmacology of pain
Authors: Fornasari D. , Coaccioli S.
Published: June 2014

This article discusses the mechanisms of action of the main drugs used to treat pain, in particular inflammatory pain. The drugs are described following a classification based on the steps of pain processing that they primarily affect.
Pain in rheumatoid arthritis: a critical review
Authors: Sarzi-Puttini P. , Salaffi F. , Di Franco M. , Bazzichi L. , Cassisi G. , Casale R. , Cazzola M. , Stisi S. , Battellino M. , Atzeni F.
Published: June 2014

Patients with rheumatoid arthritis (RA) are frequently afflicted by pain, which may be caused by joint inflammation (leading to structural joint damage) or secondary osteoarthritis, and may be increased by central sensitisation. Non-inflammatory pain may also confuse the assessment of disease activity, and so the aim of treatment is not only to combat inflammatory disease, but also relieve painful symptoms. In order to ensure effective treatment stratification, it is necessary to record a patients medical history in detail, perform a physical examination, and objectively assess synovitis and joint damage. The management of pain requires various approaches that include pharmacological analgesia and biological and non-biological treatments. Although joint replacement surgery can significantly improve RA-related pain, it may only be available to patients with the most severe advanced disease.
Pain and microcrystalline arthritis
Authors: Ramonda R. , Frallonardo P. , Oliviero F. , Lorenzin M.G. , Ortolan A. , Scanu A. , Punzi L.
Published: June 2014

Microcrystals are responsible for some of the most common and complex arthropathies which are often accompanied by intense, severe pain and inflammatory reactions. The main pathogens are crystals of monosodium urate (MSU), responsible for the gout, calcium pyrophosphate (CPP), which deposits also in various clinical forms of arthopathies, and basic calcium phosphate associated with osteoarthritis. In this context, the microcrystal arthritis is characterized by multiple, acute attacks followed by chronic pain, disability, impaired quality of life, and increased mortality. Given their chronic nature, they represent an ever more urgent public health problem. MSU and CPP crystals are also able to activate nociceptors. The pain in mycrocrystalline arthritis (MCA) is an expression of the inflammatory process. In the course of these diseases there is an abundant release of inflammatory molecules, including prostaglandins 2 and kinins. Interleukin-1 represents the most important cytokine released during the crystal-induced inflammatory process. Therefore, clinically, pain is the most important component of MCA, which lead to functional impairment and disability in a large proportion of the population. It is fundamental to diagnose these diseases as early as possible, and to this aim, to identify appropriate and specific targets for a timely therapeutic intervention.
PATHOBIOLOGY OF HODGKIN LYMPHOMA
Authors: Agostinelli Claudio , Pileri Stefano
Published: June 2014

Hodgkin’s lymphoma is a lymphoid tumour that represents about 1% of all de novo neoplasms occurring every year worldwide. Its diagnosis is based on the identification of characteristic neoplastic cells within an inflammatory milieu. Molecular studies have shown that most, if not all cases, belong to the same clonal population, which is derived from peripheral B-cells. The relevance of Epstein-Barr virus infection at least in a proportion of patients was also demonstrated. The REAL/WHO classification recognizes a basic distinction between nodular lymphocyte predominance  HL (NLPHL) and classic HL (CHL), reflecting the differences in clinical presentation, behavior, morphology, phenotype, molecular features as well as in the composition of their cellular background. CHL has been classified into four subtypes: lymphocyte rich, nodular sclerosing, mixed cellularity and lymphocyte depleted. Despite its well known histological and clinical features, Hodgkin's lymphoma (HL) has recently been the object of intense research activity, leading to a better understanding of its phenotype, molecular characteristics and possible mechanisms of lymphomagenesis.
Mapping the Literature of GIS
Authors: Scarletto Edith A.
Published: June 2014

This study analyzed citations in four journals, Annals of the Association of American Geographers, Cartography and Geographic Information Science, International Journal of Geographical Information Science, and Cartographic Journal, using Bradford’s Law of Scattering to identify three influence zones indicating core and peripheral titles in the study areas of GIS. Journals were ranked resulting in twenty-three core journals and 187 secondary journals. Scores for relevant indexing/abstracting services are also given to describe access points and coverage. The results can assist librarians and collection managers to support research in their institutions where GIS is both used and studied.
Beyond Gatekeepers of Knowledge: Scholarly Communication Practices of Academic Librarians and Archivists at ARL Institutions
Authors: Sugimoto Cassidy R. , Tsou Andrew , Naslund Sara , Hauser Alexandra , Brandon Melissa , Winter Danielle , Behles Cody , Finlay S. Craig
Published: June 2014

Librarians and archivists are intimately involved in scholarly communication systems, both as information providers and instructors. However, very little is known regarding their activities as scholars. This study seeks to examine the scholarly communication practices of librarians and archivists, the role that tenure plays in scholarly communication practices, and the degree to which institutional support is provided in librarians’ efforts to consume and disseminate research and reports of best practices. A questionnaire was sent to professional librarians and archivists at 91 ARL institutions. The responses demonstrate that ARL librarians and archivists are avid consumers and creators of scholarship, and they use emerging technologies to stay up-to-date on the profession’s latest research.
University Faculty Describe Their Use of Moving Images in Teaching and Learning and Their Perceptions of the Library’s Role in That Use
Authors: Otto Jane Johnson
Published: June 2014

The moving image plays a significant role in teaching and learning; faculty in a variety of disciplines consider it a crucial component of their coursework. Yet little has been written about how faculty identify, obtain, and use these resources and what role the library plays. This study, which engaged teaching faculty in a dialogue with library faculty, revealed a gap between faculty’s film and video information retrieval needs and provision of access by the library. Ultimately, the findings of this study can inform and transform library practices to make more moving images available for use in coursework and research.
E-Approval Plans in Research Libraries
Authors: Pickett Carmelita , Tabacaru Simona , Harrell Jeanne
Published: June 2014

Research libraries have long invested in approval plan services, which offer an economical way to acquire scholarly and scientific publications. Traditional approval plans have evolved and now enable libraries to expand their e-book offerings to better serve researchers. Publishers offer a myriad of e-book purchasing options. These range from individual titles to comprehensive packages allowing libraries to choose publisher-direct (Springer and others) or aggregator (Ebrary, for example) access, but a standard access and pricing model is needed to promote systematic acquisition of e-books. In 2010, Texas A&M University Libraries implemented an e-preferred approval plan. This article will discuss the evaluation process for research libraries migrating to an e-preferred approval plan.
Perceived Inadequacy: A Study of the Imposter Phenomenon among College and Research Librarians
Authors: Clark Melanie , Vardeman Kimberly , Barba Shelley
Published: June 2014

The Imposter Phenomenon (IP) is an observed anxiety caused by an individual’s feelings of fraudulence, fear of being exposed as a fraud, and inability to internalize personal achievement. This study measures the incidence of the IP among librarians at college and research institutions in the United States and Canada and seeks to identify factors that contribute to its frequency. One in eight librarians reported above average IP scores. Younger librarians and those with less longevity experience IP feelings at a higher rate than more experienced counterparts. Also included is a discussion of how to lessen the impact of IP feelings.
El arte del desgarro en el Uruguay de la Represión. Imposibilidades, vacíos y tensiones en la obra de Horacio Faedo.
Authors: Medici Antonella
Published: June 2014

Resumen:Este trabajo intenta considerar algunas de las producciones del artista Horacio Faedo en relación a la experiencia concentracionaria dentro del contexto de la dictadura uruguaya. Partiendo del análisis de las especificidades de este sistema represivo y su influencia en la propiaindividualidad, se pretenderán desentrañar algunas de las claves para un mejor entendimiento de sus obras, que litigan entre la figuración y la abstracción, el vacío y la corporalidad, el testimonio y su imposibilidad.Palabras clave: Arte uruguayo, Dictadura, Horacio Faedo.Abstract:This article attempts to contemplate some productions of the Uruguayan artist Horacio Faedo, regarding to the concentration imprisonment experience within the context of the Uruguayan dictatorship. Through the analysis of this repressive system specificity and its influence on individuality, it will aim to unravel some of the keys for a better understanding of his works, litigating between figuration and abstraction, emptiness and corporeality, the testimony and itsimpossibility.Keywords: Uruguayan Art, Dictatorship, Horacio Faedo.
Cine epistolar: imaginación y política del intercambio estético
Authors: Fibla Enrique
Published: June 2014

Resumen: Este artículo estudia las implicaciones políticas del intercambio estético, mediante el estudio de un proyecto de correspondencias fílmicas desarrollado por el Centro de Cultura Contemporánea de Barcelona (CCCB), entre 2005 y 2011. Propone el intercambio epistolar como una forma de interpelación cinematográfica capaz de crear afinidades geopolíticas a través de la puesta en común y el ensamblaje de realidades sensibles. En definitiva, el objetivo del presente estudio es investigar el potencial del intercambio estético como ejercicio de imaginación política, planteando la posibilidad de un valor de uso de la imagen más allá de la economía política neoliberal.Abstract: This article studies the political implications of aesthetic exchange, focusing on a filmed correspondence project developed by the Center of Contemporary Culture Barcelona (CCCB) between 2005 and 2011. It poses epistolary exchange as a form of cinematographic interpelation, capable of creating geopolitical afinities through the sharing and assembling of sensible realities. Ultimately, the aim of the article is to investigate aesthetic exchange as an exercise of political imagination, suggesting the possbility of a use-value of the image beyond neoliberal political economy readings.
Copyright de la memoria, autoficción y novela familiar en 'Soy un bravo piloto de la nueva China'
Authors: Blejmar Jordana
Published: June 2014

Resumen: Soy un bravo piloto de la nueva China (Semán, 2011) supone una vuelta de tuerca en la representación de la última dictadura militar argentina propuesta por la literatura autoficcional de las generaciones de la postdictadura. Si bien es cierto que existen antecedentes de novelas sobre la dictadura (notables, por cierto) en las que la focalización está puesta del lado de los militares o de sus cómplices,  por primera vez es una víctima directa de la dictadura el que le otorga, en la ficción, esa posición de testigo de la historia a un perpetrador. La apuesta fuerte y valiente de Semán descansa en la sospecha de que para entender mejor la historia familiar y nacional, no alcanza con los documentos heredados (cartas y fotos), o con los recuerdos de los que habitan el mundo de los vivos. La autoficción y la literatura le ofrecen lo que no puede el testimonio, la autobiografía o la crónica histórica.Abstract: Soy un bravo piloto de la nueva China (Semán, 2011) marks a shift in the autofictional representation of the last Argentine dictatorship. Like writers from previous generations and also other children of disappeared parents who have written fictional accounts of the period, Semán also grapples with the problem of how to represent perpetrators by including a military officer as a principal character. This novel, however, represents the first time that a direct victim of the dictatorship – Semán’s father being disappeared by the military regime – includes, as part of the narrative, the point of view of the perpetrator to bear witness to the traumatic events of recent Argentine history.
Los modos de representación de la apropiación de menores y la restitución de la identidad durante el proceso de institucionalización de 'Teatro x la Identidad'
Authors: Diz María Luisa
Published: June 2014

Resumen: Teatro x la Identidad es un movimiento de teatristas que se originó en el año 2000 con el objetivo de contribuir a la causa de Abuelas de Plaza de Mayo en la búsqueda y restitución de los hijos de desaparecidos que fueron apropiados durante la última dictadura militar argentina (1976-1983). El presente artículo se propone analizar el proceso de institucionalización del movimiento, desde el año 2002 en adelante, a partir de un eje de análisis: los modos de representación de la apropiación de menores y la restitución de la identidad que aparecen en una serie de cartas de presentación del movimiento, debates al interior del mismo y testimonios trabajados dramatúrgicamente. Palabras clave: Teatro x la Identidad; Institucionalización; Representaciones; Apropiación; Restitución. Abstract: Teatro x la Identidad is a movement of theatre-workers originated in year 2000 with the objective to contribute to the cause of Abuelas de Plaza de Mayo in the searching and restituction of the desaparecidos’ sons who went appropriated during the Argentinian last military dictatorship (1976-1983). This article proposes to analyze the process of the movement to become an institution, since year 2002 from this point forward, as of the core idea of analysis: the ways to represent the appropriation of minors and the restitution of identity in movement letters of introduction, internal debates and testimonies dramatically worked. Key words: Teatro x la Identidad; Become an institution; Representations; Appropriation; Restitution.
Representaciones de la infancia en 'Cuerda de presas': trazos de identidad
Authors: Hafter Lea
Published: June 2014

Resumen: Los sucesos de la guerra civil española y de la inmediata posguerra constituyen de un tiempo a esta parte un foco de interés para las artes, especialmente para la literatura. El conjunto de relatos allí enmarcados se convierte en un fenómeno de interés para la crítica especializada que, desde distintas perspectivas vertebradas principalmente en torno a los debates acerca de la memoria, cuestiona y aborda la representación de estos acontecimientos históricos, herida aún abierta en la sociedad española. Dentro del conjunto de estas representaciones, aparece una forma discursiva que circula todavía por los márgenes, la historieta. Todo esto se pone en juego en Cuerda de presas, un libro de historietas que reúne once relatos sobre la guerra civil española. En las siguientes páginas intentaré dar cuenta de una problemática específica en el contexto de la producción de relatos sobre la guerra civil y la inmediata posguerra: la representación de la niñez. Buscaré rastrear esta presencia en los relatos que componen Cuerda de presas, centrándome para ello en el análisis de las especificidades del lenguaje de la historieta, para pensar cuáles son las implicancias de las representaciones de la infancia en torno a las nociones de memoria e identidad. Palabras clave: Historieta; representación; Infancia; identidad; Posguerra.Abstract:The events of the Spanish civil war and the immediate postwar are a focus of interest for arts, especially for the literature. The stories framed there become an object of interest to the specialist critics that deals with the representation of these historical events. Within the representations, appears a discursive form that circulates into the margins: comics. All this appears in Cueda de presas, a comic book that contains eleven stories about the Spanish civil war. In the following pages I will try to account for a specific problem: childhood representation. I will seek to trace their presence in the stories of Cuerda de presas, and I will focus on the analysis of the specificities of comic language and their relation to the concepts of memory and identity.Key Words: Comic; representation; childhood; identity; postwar period.
Panorama sobre la expropiación de niños en la dictadura franquista: propuesta terminológica, estado de la cuestión y representaciones de la ficción
Authors: Souto Luz Celestina
Published: June 2014

Resumen: Con la puesta en circulación del documental Els nens perduts del franquisme, basado en las investigaciones del historiador Ricard Vinyes y emitido por TV3 en 2002 ,comenzó un proceso de fijación del conflicto delos niños robados por la dictadura española. En el presente artículo se realiza, primero, unestado de la cuestión histórica que indaga en los sucesos y en las diferencias con las apropiaciones de las dictaduras del Cono Sur; segundo, una propuesta terminológica; y tercero, un repaso por las novelas y dramaturgias españolas que han representadoel conflicto. Por último, se indaga en las consecuencias que los robos han tenido en la construcción de la memoria individual y colectiva de España.Palabras clave: apropiación de niños; franquismo; uso político de la memoria; identidad; ficciones españolas siglo XXI.Abstract: With the emergence of the documentary Els nens perduts del franquisme, based on the research of the historian Ricard Vinyes and issued by TV3 in 2002, aprocess of fixing the conflict of children stolen in the Spanish dictatorship began.This paper tries to set a historical overvie wwhich explores the facts and find the differences between the spanish case and other cases in the Southern Cone, a terminological proposal, and a review of the novels and Spanish playwrights who represented the conflict. It also explores the consequences that children appropriation has had in the construction of individual and collective memory of Spain.Key Words: appropriation of children; Franco dictatorship; political use of memory; identity; Spanish fiction 21st century.
Entrevista a Martín Kohan. Ficción, repetición, memoria.
Authors: Souto Luz Celestina
Published: June 2014

En el año 2002 Dos veces junio llamó la atención de la crítica contando lo inenarrable de la historia, abriendo un mundo ficcional no sólo creíble sino posible y desbastador. Detrás de esta novela siguieron varias producciones y con ellas un proyecto narrativo que se asentó en la defensa de la forma y el registro literario. Y es ahí, en el giro lingüístico y en el juego con el lenguaje, donde Martín Kohan integra lo social y lo político como interrogantes literarios, porque la ficción le permite llegar donde otros discursos resultan insuficientes.
Instrucciones para un coleccionista de mariposas
Authors: Perez Mariana Eva
Published: June 2014

Obra de Teatro escrita para el ciclo 2002 de Teatroxlaidentidad (Txi). Se estrenó en el Teatro del Pueblo (Buenos Aires), con dirección de Leonor Manso, asesoramiento dramatúrgico de Patricia Zangaro, actuación de María Figueras, asistencia de dirección de Lala Mendía, diseño de luces de Héctor Calmet y realización de objeto (mariposa) de Alberto Negrín. Sobre la puesta de Leonor Manso y con dirección de Lala Mendía, se realizaron funciones en distintas salas de Buenos Aires en 2005 y 2006, siempre en el marco de Txi. En 2005, bajo la dirección de Rubens Correa, la obra se presentó en Madrid (Txi España) y Bruselas (Festival Voix de Femmes). En 2011, formó parte del festival A Play, A Pie and A Pint en Edimbugo y Glasgow.
Si un día me olvidaras
Authors: Hernández Garrido Raúl
Published: June 2014

Obra de teatro sobre las apropiaciones de niños en la dictadura militar Argentina.
Correlation between groundwater flow and deformation in the fractured carbonate Gran Sasso aquifer (INFN underground laboratories, central Italy)
Authors: Amoruso A. , Crescentini L. , Martino S. , Petitta M. , Tallini M.
Published: June 2014

The Gran Sasso massif is a carbonate fractured aquifer with a spring discharge of more than 18 m3 s−1. The water table has been partially drained by two motorway tunnels and an underground laboratory (UL), located into the core aquifer. Karst features have limited role below the water table, where groundwater flow is mainly regulated by the fracture network. Two paired laser extensometers (BA and BC) recorded ground deformation in the UL. Changes in deformation correlate with the seasonal recharge/discharge cycle of groundwater flow and its long‐term changes. Hydrostatic conditions prevail during the recharge phases because of the low permeability of local fractures, favoring compression, and hydraulic gradient increase above the UL. Fast groundwater flow through the high‐permeability fault outcropping in the UL can enhance local dilatation for short periods. Spring discharge during exhaustion periods is fed by the low‐permeability fracture network, fostering hydrodynamic conditions by hydraulic gradient decrease, diminishing compression and consequently favoring dilatation. Independent support to this conceptual model comes from local tests and a numerical model which highlights the hydromechanical strain effects induced by the hydrological cycle on the jointed rock mass along BA and the role of the hydraulic gradient on the rock mass deformation.
A dynamical system perspective on plant hydraulic failure
Authors: Manzoni Stefano , Katul Gabriel , Porporato Amilcare
Published: June 2014

Photosynthesis is governed by leaf water status that depends on the difference between the rates of transpiration and water supply from the soil and through the plant xylem. When transpiration increases compared to water supply, the leaf water potential reaches a more negative equilibrium, leading to water stress. Both high atmospheric vapor pressure deficit and low soil moisture increase the water demand while decreasing the supply due to lowered soil‐to‐root conductance and xylem cavitation. Therefore, dry conditions may eventually reduce the leaf water potential to the point of collapsing the plant hydraulic system. This “hydraulic failure” is shown to correspond to a fold bifurcation where the environmental parameters (vapor pressure deficit and soil moisture) trigger the loss of a physiologically sustainable equilibrium. Using a minimal plant hydraulic model, coordination among plant hydraulic traits is shown to result in increased resilience to environmental stresses, thereby impeding hydraulic failure unless hydraulic traits deteriorate due to prolonged water shortage or other damages.
Detecting fossil fuel emissions patterns from subcontinental regions using North American in situ CO2 measurements
Authors: Shiga Yoichi P. , Michalak Anna M. , Gourdji Sharon M. , Mueller Kim L. , Yadav Vineet
Published: June 2014

The ability to monitor fossil fuel carbon dioxide (FFCO2) emissions from subcontinental regions using atmospheric CO2 observations remains an important but unrealized goal. Here we explore a necessary but not sufficient component of this goal, namely, the basic question of the detectability of FFCO2 emissions from subcontinental regions. Detectability is evaluated by examining the degree to which FFCO2 emissions patterns from specific regions are needed to explain the variability observed in high‐frequency atmospheric CO2 observations. Analyses using a CO2 monitoring network of 35 continuous measurement towers over North America show that FFCO2 emissions are difficult to detect during nonwinter months. We find that the compounding effects of the seasonality of atmospheric transport patterns and the biospheric CO2 flux signal dramatically hamper the detectability of FFCO2 emissions. Results from several synthetic data case studies highlight the need for advancements in data coverage and transport model accuracy if the goal of atmospheric measurement‐based FFCO2 emissions detection and estimation is to be achieved beyond urban scales.
An improved model for calculating tropospheric wet delay
Authors: Dousa Jan , Elias Michal
Published: June 2014

A new concept is described for calculating the tropospheric zenith wet delay (ZWD) and its vertical approximation derived from the original profile of meteorological data. A new parameter of ZWD exponential decay is introduced which, together with a reference value, represents ZWD corrections accurately up to 10 km altitude. The new parameter considerably improves ZWD vertical reduction and surface ZWD calculation using the model of Askne and Nordius (1987). This development reduces the original large data set of a numerical weather model to an accurate grid representation at a reference level that may be more effectively disseminated. This can be used in regional augmentation models for precise positioning and navigation.
Magnitude −7 level earthquakes: A new lower limit of self‐similarity in seismic scaling relationships
Authors: Yoshimitsu Nana , Kawakata Hironori , Takahashi Naoki
Published: June 2014

Microfractures occurring in a rock sample that are called acoustic emission (AE) events show some similar features to earthquakes. However, it remains to be shown whether or not AE equate to ultramicroearthquakes. In this study, we show the existence of magnitude −7 level earthquakes based on seismological analyses of AE source parameters. Advances in multichannel, broadband, high‐speed continuous recording of AE under seismogenic pressure conditions has facilitated increasingly robust measurement. Source parameters of AE show that AE events satisfy the same scaling relationship as natural earthquakes in which seismic moment is inversely proportional to the cube of corner frequency. This result suggests that both millimeter scale fractures and natural earthquakes of kilometer scale ruptures are highly similar as physical processes. Hence, AE events can be interpreted as ultramicroearthquakes having a magnitude of about −7. These results demonstrate that laboratory observation is an effective approach in studying natural earthquake generation process.
Location and analysis of acoustic infrasound pulses in lightning
Authors: Arechiga R. , Stock M. , Thomas R. , Erives H. , Rison W. , Edens H. , Lapierre J.
Published: June 2014

Acoustic, VHF, and electrostatic measurements throw new light onto the origin and production mechanism of the thunder infrasound signature (<10 Hz) from lightning. This signature, composed of an initial compression followed by a rarefaction pulse, has been the subject of several unconfirmed theories and models. The observations of two intracloud flashes which each produced multiple infrasound pulses were analyzed for this work. Once the variation of the speed of sound with temperature is taken into account, both the compression and rarefaction portions of the infrasound pulses are found to originate very near lightning channels mapped by the Lightning Mapping Array. We found that none of the currently proposed models can explain infrasound generation by lightning, and thus propose an alternate theory: The infrasound compression pulse is produced by electrostatic interaction of the charge deposited on the channel and in the streamer zone of the lightning channel.
Application of the Geostationary Ocean Color Imager (GOCI) to estimates of ocean surface currents
Authors: Yang Hyun , Choi Jong‐Kuk , Park Young‐Je , Han Hee‐Jeong , Ryu Joo‐Hyung
Published: June 2014

The Geostationary Ocean Color Imager (GOCI) can be utilized efficiently to observe subtle changes in oceanic environments under cloud‐free conditions because it receives ocean color images around the Korean Peninsula hourly, for 8 h a day. Here we investigated the applicability of the GOCI for estimating hourly variations in ocean surface currents, which provide significant information on seawater circulation for fisheries, shipping controls, and more. Ocean surface currents were deduced from eight images of GOCI‐derived total suspended matter (TSM) from highly turbid coastal waters and images of chlorophyll concentration (CHL) for relatively clear waters. The results showed that GOCI TSM‐derived ocean surface currents can effectively estimate and represent fast tidal currents, as well as flood and ebb tides on the west coast of Korea, in comparison with in situ measurements. GOCI‐derived CHL scenes successfully illustrated currents moving along boundaries where warm and cold seawaters mix, in addition to mesoscale currents such as the East Korea Warm Current (EKWC) in the East Sea of Korea. Satellite‐based sea surface temperature and sea surface height images supported the reliability of GOCI‐derived ocean surface currents in the East Sea.
CC Coupling Through Intramolecular Dual CH Activation Directed by a Removable Carboxylate Group: A Method for the Synthesis of Fluorenones under Mild Reaction Conditions
Authors: Liu Lu , Wang Fang , Li Zhenghong , Wang Jianhui
Published: June 2014

A highly efficient method for the synthesis of fluorenones through a palladium‐catalyzed intramolecular oxidative coupling reaction via dual CH activations is reported. In this reaction, substituted fluorenones were obtained in moderate to high yields from diphenylacetic acid and its derivatives as substrates. The carboxylate, as a removable directing group, plays an important role in the dual CH activations of the substrate. The current method provides an efficient synthetic route for producing a variety of substituted fluorenones under mild reaction conditions.
The effect of depth and duration of UV radiation on polypropylene modification via photoinitiation
Authors: Amintowlieh Yasaman , Tzoganakis Costas , Penlidis Alexander
Published: June 2014

Linear polypropylene (PP) was modified using UV radiation in the presence of 0.5 wt % of benzophenone photoinitiator to introduce long chain branching (LCB) to the PP backbone. Irradiation was carried out in the solid state and the temperature level was kept below 60°C. The effects of radiation duration and sample thickness on the extent of these branching modification reactions were investigated. Viscoelastic properties, molecular weight, molecular weight distribution, and gel content were determined and compared for runs having different sample thicknesses, irradiated for different times. Comparisons were also conducted with the parent PP and the PP mixed with photoinitiator. It was found that LCB decreased by increasing the thickness of the samples. Conversely, an increase in radiation duration resulted in enhanced LCB but also led to larger gel content in the samples. Based on all these measurements and observations, a mechanism was suggested to explain formation of long chain branches (LCBs) in PP in the solid state via photoinitiation. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41021.
At Birth, Tarsiers Lack a Postorbital Bar or Septum
Authors: Smith Timothy D. , Deleon Valerie B. , Rosenberger Alfred L.
Published: June 2014

Among primates, partial or complete posterior closure of the orbit has been widely accepted as a shared derived characteristic justifying an exclusive tarsier‐anthropoid clade, while some regard the tarsier lateral orbit as an elaborated postorbital bar (POB). To test these competing hypotheses while minimizing the confounding effect of tarsier orbital hypertrophy, we compared tarsiers and other primates at early (fetal and newborn) ages using dissection, micro‐CT scans and soft tissue histology. Our findings demonstrate unanticipated variation in the anatomy and development of the zygomaticofrontal (ZFA) articulation, which forms the orbit's lateral framework. Tarsiers uniquely exhibit a combination of two features: absence of a pre‐ and peri‐natal frontal spur to join with the zygomatic to form the ZFA; and, the spur's substitution by an elaborate ligament, which envelops the eye laterally as an expansive postorbital membrane (POM) that merges with the anterolateral fontanelle of the lateral cranial vault. In lacking a frontal spur, tarsiers are distinct from strepsirhines, while the ligamentous structure of the POM distinguishes its ZFA from that of anthropoids, which is a typical facial suture at and prior to birth. The POM of tarsiers may be thought of as an accessory fontanelle, a structural compromise that provides flexible stability and spatial separation of bones while anticipating rapid postnatal growth of an enormously enlarged eye. We regard the tarsier POM as part of a neomorphic eyeball hypertrophy complex, and reject the hypothesis of derived homology of the postorbital septa of adult tarsiers and anthropoids on histological, developmental and functional grounds. © 2013 Wiley Periodicals, Inc.
Alveolar Epithelial Dynamics in Postpneumonectomy Lung Growth
Authors: Chamoto Kenji , Gibney Barry C. , Ackermann Maximilian , Lee Grace S. , Konerding Moritz A. , Tsuda Akira , Mentzer Steven J.
Published: June 2014

The intimate anatomic and functional relationship between epithelial cells and endothelial cells within the alveolus suggests the likelihood of a coordinated response during postpneumonectomy lung growth. To define the population dynamics and potential contribution of alveolar epithelial cells to alveolar angiogenesis, we studied alveolar Type II and I cells during the 21 days after pneumonectomy. Alveolar Type II cells were defined and isolated by flow cytometry using a CD45−, MHC class II+, phosphine+ phenotype. These phenotypically defined alveolar Type II cells demonstrated an increase in cell number after pneumonectomy; the increase in cell number preceded the increase in Type I (T1α+) cells. Using a parabiotic wild type/GFP pneumonectomy model, <3% of the Type II cells and 1% of the Type I cells were positive for GFP—a finding consistent with the absence of a blood‐borne contribution to alveolar epithelial cells. The CD45−, MHC class II+, phosphine+ Type II cells demonstrated the active transcription of angiogenesis‐related genes both before and after pneumonectomy. When the Type II cells on Day 7 after pneumonectomy were compared to nonsurgical controls, 10 genes demonstrated significantly increased expression (P<0.05). In contrast to the normal adult Type II cells, there was notable expression of inflammation‐associated genes (Ccl2, Cxcl2, Ifng) as well as genes associated with epithelial growth (Ereg, Lep). Together, the data suggest an active contribution of local alveolar Type II cells to alveolar growth. Anat Rec, 296:495–503, 2013. © 2013 Wiley Periodicals, Inc.
Nondestructive, Epi‐Illumination Surface Microscopic Characterization of Surface Discontinuity in Bone: A New Approach Offers a Descriptive Vocabulary and New Insights
Authors: Rothschild Bruce M.
Published: June 2014

Perspectives are in the eye of the beholder and are expanded with increased scrutiny (e.g., magnification). The term “porosity' for macroscopically or radiologically identifiable discontinuity in bone is so variably applied as to be incomprehensible in its meanings. A closer examination of surface discontinuity seems appropriate. Histological and atomic level analysis of bone alterations misses the forest for the trees and the former destroys the very subject it attempts to characterize. Surface discontinuity was therefore evaluated at the three‐dimensional submacroscopic level. An epifluorescent/illumination microscope was used to characterize surface discontinuity in intact specimens of known pathophysiology and/or derivation. The derived perspectives were then utilized to characterize other surface discontinuity. The smooth boundaries of vascular foramen and internal bifurcation, continuity of the expanded base of nerve structures and surrounding elevated rings of Sharpey fibers are all clearly distinguishable from fronts of resorption in erosive arthritis, serpentine discontinuity associated with infectious processes, specific zones of resorption noted in tuberculosis, and structural bone exposure by taphonomic abrasion. These perspectives allow the bone pathology associated with hematoma to be characterized as accentuated Sharpey fiber insertions; maxillary and sphenoid surface discontinuity, as vascular in origin; and periosteal reaction, as manifest by superficial bifurcating channels and in‐growth, similar to healing trephanation. Epi‐illumination microscopy bridges macroscopic and histological examination, providing greater understanding of the pathology, at no cost to the integrity of the material studied. It explains a number of observed results, while providing discriminatory descriptions of phenomena for which pathophysiology has not yet been clarified. Anat Rec, 296:580–589, 2013. © 2013 Wiley Periodicals, Inc.