bluuebunny/crossref_metadata_2025_split huggingface dataset:
Caracterización microestructural, mecánica y de desgaste de recubrimientos de CuxAly depositados mediante proyección térmica
Authors: Hincapie-Campos Williams Steve , Olaya-Flores Jhon Jairo , Alfonso-Orjuela Jose Edgar 
Published: September 2017

En este trabajo se caracterizó la microestructura, la adherencia y el coeficiente de desgate de recubrimientos de CuxAly depositados mediante proyección térmica sobre sustratos de latón. En el estudio se utilizaron como parámetros de evaluación la preparación superficial del sustrato y un recubrimiento intermedio que actúa como capa adhesiva. El análisis de la composición química se hizo mediante la fluorescencia de rayos X (FRX), el análisis estructural se realizó por medio de la difracción de rayos X (DRX) y la microscopía electrónica de transmisión (MET). La adherencia se determinó mediante los ensayos de rayado transversales, la respuesta mecánica se evaluó mediante la medición de la dureza Knoop y pruebas de desgaste abrasivo tres cuerpos y "Pin en disco". Los resultados permitieron establecer que el recubrimiento sin capa adhesiva y preparada por granallado metálico puede ser utilizado en la recuperación de piezas debido a que presenta menor falla cohesiva.
Elementos conceptuales de la globalización para la inclusión del riesgo en la planificación regional
Authors: Mesías Rosas Oswaldo 
Published: September 2017

El objetivo de este trabajo es presentar algunos conceptos fundamentales que deben ser considerados para presentar propuestas que ayuden a definir el uso y la organización de las áreas vulnerables frente a amenazas naturales, entendido en el actual contexto de globalización económica que influye fuertemente en la planificación territorial. Estos elementos contribuirán a fortalecer tanto el marco teórico como metodológico para aportar al desarrollo de políticas urbano-regionales que contribuyan a la gestión de riesgos. La hipótesis presentada para el desarrollo de este artículo argumenta que, para el actual fenómeno de globalización dominante, todavía podemos encontrar oportunidades en las que logremos superar el paradigma exclusivo que este modelo ha establecido a favor de una planificación territorial que sólo atiende a los intereses de la reproducción del capital. A partir de la lógica del desarrollo local y de una posición endógena, especialmente en lo que respecta a todo lo relacionado con la gestión del riesgo de origen natural, es posible plantear alternativas del ordenamiento territorial sostenibles que consideren las opiniones de las comunidades afectadas y que garanticen la preservación de la vida y los bienes de las personas que son directamente aquejadas.
La habitabilidad y la transdisciplinariedad
Authors: Espinosa Zurita Mónica 
Published: September 2017

Este artículo aborda la habitabilidad, el espacio habitado y las acciones propias del habitante en una casa. Estos tres elementos interactúan de manera dinámica permanente en diferentes momentos de vida. El objetivo es hacer una reflexión sobre la habitabilidad, incorporando a la arquitectura elementos psicológicos, sociales, antropológicos para mejorar la vida y la salud del habitante de la ciudad. Se plantean aspectos perceptuales, sociales, institucionales y culturales que construyen identidades y fortalecen el ser personal y grupal, manifestándose en costumbres, ritos, narrativas, huellas de memorias, significantes, significados y en los objetos que los acompañan.
Termas de la Garita
Authors: Berrocal Murillo Alejandro 
Published: September 2017

Termas de la Garita es un proyecto académico del Taller de Diseño opción Arquitectura Tropical, del último nivel de la Carrera de Arquitectura de la Universidad de Costa Rica (UCR). Este se desarrolló en conjunto con el Laboratorio de Arquitectura Tropical (LAT) de la Escuela de Arquitectura para un control importante de las variables bioclimáticas del proyecto que contempla un complejo de termas en una zona de clima cálido-húmedo de Costa Rica.
Posztoperatív vertigo vizsgálata stapedotomián és stapedectomián átesett betegeknél
Authors: Harmat Kinga , Thurén Gergely , Simon László , Nepp Nelli , Németh Adrienn , Gerlinger Imre , Bakó Péter 
Published: September 2017

Abstract: Introduction and aim: The reason of gradually developing conductive hearing loss in otosclerotic patients is the ossification of the stapes footplate to the surrounding bony structures and the therapy of stapes fixation is mainly surgical. In stapedotomy the footplate of the stapes is fenestrated with laser and microdrill in a diameter of 0.8 mm, whereas in stapedectomy there is complete removal of the footplate followed by the reconstruction of the ossicular chain. In the early postoperative period, temporary vertigo is frequently recorded which significantly influences the recovery. Method: In the Department of Otorhinolaryngology, University of Pécs both stapedectomy and stapedotomy were performed on a daily basis between 01.02.2010 and 15.03.2012. Our study focused on comparing the degree of postoperative vertigo after the two types of surgery. We hypothesized that the smaller fenestration of the stapes footplate during stapedotomy limits exposure to the inner ear reducing the severity of dizziness. Vertigo was evaluated subjectively with a retrospective questionnaire and objectively with static posturography. Results: On the 1st postoperative day, significantly fewer patients reported vertigo in the stapedotomy group and with significantly lower intensity. Results of the questionnaire regarding the later postoperative period showed no significant differences between the groups. Based on the analysis of the posturography test results, no significant difference was detected between the postoperative stability of the two groups. Results of the questionnaire and the posturography showed no correlation. Posturography test results did not confirm the presence of subjective vertigo. Conclusion: Many factors may play a role in the development of vertigo after stapes surgery, but the type of intervention does not influence it. Orv Hetil. 2017; 158(38): 1503–1511.
A proteção social no campo da seguridade à luz do discurso solidarista
Authors: Zucchetti Dinora Tereza , Marçal Patricia Fontes 
Published: September 2017

O ensaio de revisão bibliográfica e estudo de legislações de base tem por objetivo demonstrar a forma como o Discurso Solidarista oferece substrato para a emergência do conceito de Seguridade Social, no Brasil contemporâneo. Parte de uma breve apresentação histórica da Previdência Social buscando, a partir daí, situar o atual sistema de Seguridade Social brasileiro constituído pelo tripé da Previdência Social, Saúde e Assistência Social. Atualiza questões de longa data – patrimonialismo, verticalidade e exclusão social – que produzem, ainda hoje, marcas profundas nas populações pior situadas social e economicamente, e que sofrem, também, os reflexos de um modelo de sociedade subserviente ao capitalismo internacional, globalizado. Mesmo mediante um quadro histórico e econômico pouco promissor o ensaio reafirma a proteção da cidadania enquanto direito constitucional. Contudo, não se exime em chamar a atenção para os limites de uma proteção social onde o conceito de solidariedade presente no Discurso Solidarista, de caráter jurídico-político, é limitante e limitador numa sociedade onde controle social é de baixíssima intensidade.
Exp erimental research of wearable artificial kidney
Authors: Bazaev N. A. , Grinvald V. M. , Selishchev S. V. , Kalinov A. V. , Kozachuk A. V. , Kosatkin V. V. , Tyunder F. F. , Federyakin D. V. 
Published: September 2017

Aim.The article presents the results of wearable artificial kidney (WAK) biomedical trial based on peritoneal dialysis with continuous dialysate regeneration.Materials and methods.The trial was carried out on a 15-kg dog. First stage: dialysis was carried out on healthy dog to evaluate effect of WAK on blood biochemical indicators. Second stage: 200 ml of X-ray contrast agent was injected into dog’s bloodstream to simulate acute kidney failure.Results. During trial (39.5 hours) WAK was performing continuous peritoneal dialysis with dialysis fluid regeneration. During second stage (34 hours) creatinine and uric acid were eliminated from dialysis solution at the rate of 0.3 mg/h, urea was eliminated at the rate of 0.15 g/h, total removed ultrafiltrate volume was 350 ml. At the end of the second stage blood biochemical indicators stabilised in the range of normal values.Conclusion. Developed WAK can perform continuous blood purification and ultrafiltration with no pathologic impact on blood biochemical indicators.
Pancreas transplantation in the treatment of diabetes mellitus type 1: modern aspects
Authors: Gautier S. V. , Arzumanov S. V. 
Published: September 2017

Diabetes mellitus is a significant social problem. In the Russian Federation, the prevalence of diabetes type 1 is 340.000 people, 21% of them having diabetic nephropathy, as well as other secondary complications leading to disability and high mortality. There are several options for diabetic patients with chronic kidney disease dialysis: kidney transplantation with insulin therapy, simultaneous kidney-pancreas transplant or islet transplant. Good long-term results could be obtained by the whole pancreas and kidney combined transplantation through maximum metabolism recovery comparing to other replacement therapy options. The recipientselection with special attention to the cardiovascular system evaluation is essential to successful transplantation. The proper pancreatic graft assessment needs a wide range of criteria to be analyzed. Integral scores can simplify and systematize the assessment. The choice of preservation technique is important to pancreatic graft ischemia-reperfusion injury minimization. Despite the progress in graft preservation methods, cold storage using University of Wisconsin (UW) solution remains to be the gold standard. The evolution of surgical technique has resulted in utilizing the most physiologic variations of exocrine drainage and venous outflow of the pancreas, so-called portoenteric drainages, which were designed to improve remote metabolic effects and to reduce complications probability.
Modelle und Dienste für das Betriebsmanagement
Authors: Wollschlaeger Martin , Bieliaiev Oleksandr , Bangemann Thomas , Weinmann Max 
Published: September 2017

Die Aufgaben von Manufacturing Execution Systems werden in Industrie 4.0 weiter wachsen, hin zum übergreifenden Betriebsmanagement. Ein solches Manufacturing Operations Management ist ein wesentlicher Bestandteil eines Industrie-4.0-basierten Produktionssystems. Die für heutige MES definierten Funktionen und Interaktionsmechanismen müssen daher für Industrie 4.0 durch Definition von entsprechenden Teilmodellen und Diensten aufbereitet und in interoperabler Form bereitgestellt werden. Der Beitrag motiviert und diskutiert eine solche Ableitung von Industrie-4.0-konformen Teilmodellen und Diensten auf Basis der IEC/EN 62264.
Semantische Inhalte für Industrie 4.0
Authors: Fay Alexander , Scholz André , Hildebrandt Constantin , Schröder Tizian , Diedrich Christian , Dubovy Martin , Wiegand Ralf , Eck Christian , Heidel Roland 
Published: September 2017

Kooperation und Kollaboration technischer Systeme sind in Anwendungsszenarien eines der wesentlichen Ziele der Initiative Industrie 4.0. Hierzu ist es notwendig, eine semantische Basis für den Informationsaustausch zwischen den technischen Systemen zu definieren. Der Beitrag stellt ein Konzept zu deren Modellierung vor, das auf der Nutzung einer modellübergreifenden und alle Lebenszyklusphasen umspannenden Semantik basiert. Für die technischen Systeme wird ein Systemmodell definiert, das die notwendige Information abbildet und mit Hilfe von AutomationML neutral austauschbar macht. Als wichtiges Modellierungselement werden die Eigenschaften mit Referenzen auf ihre Typbeschreibungen versehen. Aus dem Beitrag wird ersichtlich, wie die Anwendungsszenarien von Industrie 4.0 mit dem Konzept der Industrie-4.0-Komponente und deren Verwaltungsschale zusammenwirken.
Antibacterial Activity of Melanin from Cuttlefish and Squid Ink
Authors: Fitrial Yuspihana , Khotimah Iin Khusnul 
Published: September 2017

Marine environment comprises of many organism which are known to posses bioactive compound as a common means of self-defense or for the protection of eggs and embryos. Class Cephalopods (such as squid<br />and cuttlefish) are notable for their defences, such as jetting escape movements, changes in colouration, toxic venom and inking.This study aims to compare the antibacterial activity of melanin from cuttlefish ink (Sepia sp.) with squid ink (Loligo sp.) against E. coli. Extraction and purification studies were carried out on Sepia and Loligo melanin using a hydrochloric acid 0,5M treatment under mechanical.The melanins were obtained and further evaluated their activity by direct contact methods between melanin and E. coli in nutrient broth.Total microbes was counted by total plate count.Both inks also was tested their activity against E. coli. The results showed that melanin from cuttlefish and squid inks had inhibitory activity at concentrations of 10 mg / ml and 20 mg / mL, respectively reaching 99.99% against E. coli.The inks of both Cephalopods at the same concentration as melanin, did not show any inhibitory activity against E. coli. The melanin of Sepia sp. have a higher antibacterial activity than the melanin of Loligo sp.
THERMAL STABILITY OF SYNTHETIC PEPTIDES MIMICKING THE SEQUENCE OF THE REGION CONTAINING THE SKIP RESIDUES IN SQUID MYOSIN ROD
Authors: Ochiai Yoshihiro , Nurilmala Mala , Wang GuoFeng , Watabed Shugo 
Published: September 2017

Myosin is the major protein in skeletal muscles including those of fish and shellfish. The characteristics of this protein are closely related to the biological function and the quality and physical properties of muscle<br />food. In the myosin rod (the coiled-coil region of myosin), several amino acid residues, known as skip residues, seem to destabilize the ordered structure (heptad repeat). These residues might be responsible for reducing thermal stability. Attempts were thus made to examine the role of these residues in the rod of squid myosin, based on the thermodynamic properties of synthetic peptides which have been designed to mimic the partial sequence of myosin heavy chain from the squid Todarodes pacificus mantle muscle. Five peptides, namely, with the sequence of Trp1343 -Ala1372 having the skip residue Glu1357 at the center (Peptide WT), without the skip residue (Peptide Δ), with the replacements of the skip residue (Glu) by Ile, Gln and Pro (Peptides E/I, E/Q, and E/P, respectively) to modify the helix forming propensity, were synthesized. The results obtained showed that the stability of the peptides as measured by circular dichroism spectrometry was in the order of Peptide Δ &gt; Peptide WT &gt; Peptide E/Q &gt; Peptide E/P &gt; Peptide E/I. It is suggested that the presence of the skip residues dexterously tunes the stability or flexibility of the coiled-coil structure, thus possibly regulating thick filament formation and further gel formation ability of myosin.
Why is the BME attainment gap such a wicked problem?
Authors: Austen Liz , Heaton Caroline , Jones-Devitt Stella , Pickering Nathaniel 
Published: September 2017

This paper outlines a research process which followed a case study approach (Yin, 2009) to explore the Black and Minority Ethnic (BME) student attainment gap, and responses to it, at Sheffield Hallam University. A mixed methodology was envisaged, which would triangulate institutional data, measures of student engagement, focus groups and researcher reflections to construct an analysis of interventions aimed at enhancing confidence and belonging for BME students. This discussion focuses on the challenges experienced by the research team and uses the notion of a 'wicked problem' to help understand the limitations faced. 'Wicked problems' (Rittel, 1972; see Conklin, 2005) are entrenched in social complexity, which increases in line with the diversity of the associated stakeholders. These problems have the ability to divide opinion, provide limited solutions and lay blame for lack of results. This research examining the BME attainment gap can be critiqued using this notion of a 'wicked problem', noting that, without recognition, this issue has the potential to become ubiquitous and almost unsolvable.
Examining predictors of retention with implications for TESTA@Greenwich
Authors: Walker Simon , McKenna Duncan , Abdillahi Abdillahi , Moleswoth Catherine 
Published: September 2017

Student attrition is a pressing issue that universities across the world are attempting to solve. More recently, there has been a focus on retaining students from so-called ‘hard to reach’ groups. This paper proposes a methodology that investigates potential predictors of retention within the context of a particular institution, with the aim of defining who our ‘hard to reach’ students might be. It includes TESTA, a feedback and assessment enhancement process, as an independent variable to determine whether this particular enhancement initiative had any positive effects on retention. The authors use a statistical technique that permits a comparison of retention within the same programmes, pre- versus post-TESTA, relative to background changes in retention in programmes without TESTA over the same timescale. The results of our analysis revealed that of the 10 predictors selected, the following were statistically significant: age group; gender; ethnicity; highest qualification on entry; academic session. These form the basis of our definition of who are ‘hard to reach’ students at our university. Whilst TESTA had no statistically significant impact on retention, several important implications for making specific interventions through TESTA in relation to assessment design and delivery to increase retention are discussed.
Concluding thoughts on the REACT Programme
Authors: Dunne Elisabeth 
Published: September 2017

REACT, in many ways, has been about diversity: of type of institution; of students’ setting and intake; of current level of activity in relation to student engagement; of approaches to change, of roles and expertise of partner staff; of the particular purpose and activity of the ‘hard to reach’ engagement project undertaken and the stakeholders involved. As a consequence, and because the authors for this issue were encouraged to write in ways they considered appropriate rather than being given a standard template, the content and style of every paper are very different and each needs to be read for its own individual story. There are three agendas, however, which are fundamental to the REACT programme and outcomes. Each of these is discussed in turn: building evidence through a culture of evaluation and research; ‘hard to reach’ students and the notion of ‘reaching out’; the management of change in the context of REACT. The discussion reflects the learning of the REACT team, gained from working alongside the collaborative partner institutions, and includes comments from the independent evaluation undertaken by GuildHE to support points made.
The Application of Aluminum Toe Casing for Landing Production Strings in Extended Lateral Wells
Authors: Brown Christian F. , Dziekonski Mitchell 
Published: September 2017

Abstract
With the increase in average lateral length for horizontal wells comes increased challenges for reaching total depth (TD) with the production casing. Any production interval left un-cased will not contribute to initial or ultimate production or be booked as reserves, which can have a major detrimental impact on the financials of these wells.
ALTISS Technologies has designed a patent pending aluminum casing concept to facilitate the installation of long cased laterals, and assist with landing casing at the total depth. Due to its low density and low modulus of elasticity, the aluminum casing is about half the buoyed weight and twice as flexible as comparable steel casing. These physical properties help the aluminum casing lighten the toe of the casing string and navigate through micro doglegs and tortuous wellbores.
The aluminum casing was designed with a focus on torque and drag reduction, to be used in limited quantities to maximize the benefits and ensure that casing reaches total depth. Analysis showed that 4,000 pounds of hook load could be added, without casing rotation, with as little as 160 feet of aluminum casing installed, in some cases. To ensure proper threaded connections with the low modulus aluminum, ALTISS designed its own 5 ½" premium threaded connection, which exceeded 56,000 ft.-lbs. yield torque in testing. Multiple aluminum tubular specimens were collapsed in a laboratory setting to validate equations which are not covered by API calculations, nor conventional closed form solutions (e.g. Timoshenko, Tamano). An experimental nano-coating is currently being evaluated that will protect the aluminum from potential forms of corrosion, including galvanic reactions and acid programs.
The advantages of installing aluminum casing may allow for eliminating expensive premium threaded connections needed for rotating casing, or alternatives such as floating casing. Ensuring the lateral is 100% cased improves initial production, allowable booked reserves, and ultimate hydrocarbon recovery of the well.
Machine Learning–Based Trigger Detection of Drilling Events Based on Drilling Data
Authors: Zhao Jie , Shen Yuelin , Chen Wei , Zhang Zhengxin , Johnston Sonny 
Published: September 2017

Abstract
A method is developed to detect the precursors of drilling events based on drilling data such as surface data, wellbore geometry data, lithology (formation characteristics), and downhole measurements from various downhole tools. The drilling events refer to interesting behavior of the drilling system detected or recorded, such as severe vibration, stuck pipe, fluid loss, sudden equivalent circulating density (ECD) changes, etc.
The method is based on various machine learning techniques to learn the changing trend of drilling parameters when the drilling events happen. Specifically, the drilling events are first extracted from massive drilling data using defined thresholds and/or criteria. Then, the time series of drilling parameters are represented by symbolic aggregate approximation (SAX). The patterns of these SAX strings are clustered by unsupervised learning and then used for pattern recognition with dynamic time warping (DTW). Finally, the searching pattern recognition is proposed to classify the changing trend of drilling parameters.
The traditional SAX method is not suitable for drilling data processing because it assumes that the data should be Gaussian distributed. With the modified SAX, two sets of SAX parameters are used to cluster the time series by unsupervised learning with dynamic time warping distance as measure. It is found that one set of SAX parameters (alphabet size of 5 and 15-data-point window) could yield more reasonable patterns, including flat, ramp up, ramp down, step up, step down, pulse up, and pulse down. The changing trends of drilling parameters are classified to the predefined patterns with shortest DTW distance by using searching pattern recognition method. Finally, several experiments are conducted to demonstrate the effectiveness of proposed method.
This is an innovative work to apply the data mining and machine learning techniques to drilling interpretation. It provides a useful way for the remote center to monitor the onset of abnormal drilling events and inform the drillers taking actions to optimize the drilling operation. In addition, it helps the drilling community to understand the triggers of challenging drilling events such as stick/slip, whirling, etc.