bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining device position through minimal user input
Authors: McNaughton James , Crick Tom , Hatch Andrew 
Published: September 2017

AbstractIn many co-located, collaborative systems there is a need for the constituent devices used to be aware of the physical positions of their networked counterparts. This paper addresses this challenge by presenting a novel method of utilising users’ judgement of direction to obtain the location and orientation of a touch interface. The technique requires a user to draw several arrows on an interface which point towards physical landmarks in an environment. This allows for the setup of interface locations in a way which is (i) quick; (ii) inexpensive; (iii) not encumbering; and (iv) capable of being performed despite obstructions in the environment. A user study is presented which investigates what influence a user’s accuracy has on the technique’s resulting calculated location of an interface. The study reveals that the magnitude of a user’s inaccuracies is proportional to the size of the error in the result and that there is no improvement in user accuracy with practice. Finally, we make observations on the future extension and application of this technique.
Envisioning the era of 3D printing: a conceptual model for the fashion industry
Authors: Sun Lushan , Zhao Li 
Published: September 2017

AbstractThe emergence of 3D printing technology in the fashion industries has led to a rapidly growing attention and discussion on its coming impacts, novel approaches and those relevant challenges involved in its supply chain integration. The purpose of this conceptual study is to examine the potential impacts and challenges of integrating Direct Digital Manufacturing methods, specifically 3D printing (3DP), in the fashion industry. To recognize and organize such integration, we first examine the nature of Direct digital manufacturing (DDM) in contrast to traditional manufacturing approaches. After that, a conceptual model applied to DDM integrated fashion industry was then proposed to address this change. With respect to 3DP, four areas of its direct and indirect impacts were prudently examined, which were primarily put on (1) design and product development, (2) sourcing and manufacturing, (3) retail, distribution and consumer, as well as (4) the sustainability optimization. The potential challenges of integrating 3DP, which ultimately leads to the DDM paradigm, in each of these areas were also evaluated. Beyond the identified impacts and challenges, this proposed conceptual model ultimately aims to help lay the groundwork, explore future research topics and curricula for the fashion field integrating DDM, focusing on the 3DP technology.
Revitalization of abandoned oil and gas wells for a geothermal heat exploitation by means of closed circulation: Case study of the deep dry well Pčelić-1
Authors: Macenić Marija , Kurevija Tomislav 
Published: September 2017

The aim of our research is to use abandoned deep-hydrocarbon reservoirs and dry wells in the Croatian part of the Pannonian Basin as a geothermal energy source. Croatia has been exploring and exploiting hydrocarbon reserves in the Pannonian Basin from the mid-20th century. Therefore, many oil and gas wells are reaching the end of their production phase and many are already abandoned. These wells could be considered for geothermal energy production through the coaxial heat exchanger principle, which is usually used in shallow geothermal energy extraction. Using the abandoned deep well Pčelić located in the Drava subbasin as a case study, we have derived the available energy and fluid temperature changes during 20 years of operation for two cases: one with a constant base heat load throughout the year and the second as a variable heat load depending on outside air temperatures. We determined that the maximum potential heat extraction in a variable system is 1750 MWh per year, with 1.5 MW of peak heating power in winter, depending on the sink temperature, climate, and consumer input data. The maximum theoretical constant heat extraction for possible industrial direct heating could be 400 kW during the entire period of 20 years, with fluid temperature reaching steady state at a favorable 50°C. To define steady-state ratio between extracted heat and consumed energy at the circulating pump, we evaluated seasonal performance factor (SPF) analysis similar to heat pump systems. Lower values of SPF linked to a higher flow rate implies higher energy extraction. Our results show that when using a lower flow, steady-state SPF ratio is as high as 280, and for a higher flow, steady-state SPF ratio drops to only 25.
COPD affected lung tissue remodelling due to the local distribution of MMP-2, TIMP-2, TGF-β1 and HSP-70
Authors: Vitenberga Zane , Pilmane Māra , Babjoniševa Aurika 
Published: September 2017

Chronic obstructive pulmonary disease (COPD) is strongly associated with progressive airway limitation where the key mechanism is abnormal airway remodelling of bronchial mucosa maintained by complex crosstalk of tissue remodelling and regulatory factors. The aim of this study was to determine the appearance and local distribution of tissue remodelling factors in COPD-affected lung tissue and to compare the findings with the control group. In this study, lung tissue specimens were obtained from 27 patients with COPD and 49 control patients. Tissue samples were examined by routine hematoxylin and eosin staining. Remodelling and regulatory factors matrix metalloproteinase-2 (MMP-2), tissue inhibitor of metalloproteinase-2 (TIMP-2), transforming growth factor-β1 (TGF-β1), as well as heat shock protein-70 (Hsp-70) were detected by immunohistochemistry in airway mucosa. The numbers of positive structures were evaluated semiquantitatively. Non-parametrical statistical analysis was performed. Overall COPD-affected lung tissue presented chronic inflammation and tissue remodelling in routine histological analysis. Compared to the control group, statistically significant (P<0.05) difference was calculated between COPD-affected lung tissue and control group with overall more immunoreactive cells containing MMP-2, TIMP-2 and TGF-β1 and less Hsp-70 immunoreactive bronchial epithelial cells, subepithelial connective tissue fibroblasts, bronchial smooth muscle cells and secretory cells of bronchial glands with more pronounced findings of TGF-β1, however, less Hsp-70. Study findings suggest pronounced tissue damage and remodelling with the local regulatory environment of up-regulated TGF-β1. Increased numbers of MMP-2, TIMP-2 and TGF-β1 immunoreactive cells suggest the key role of these remodelling factors in COPD pathogenesis. Decrease of Hsp-70 proves increased cell damage in COPD-affected airway mucosa.
A New General-Purpose Algorithm for Mixed-Integer Bilevel Linear Programs
Authors: Fischetti Matteo , Ljubić Ivana , Monaci Michele , Sinnl Markus 
Published: September 2017

Bilevel optimization problems are very challenging optimization models arising in many important practical contexts, including pricing mechanisms in the energy sector, airline and telecommunication industry, transportation networks, critical infrastructure defense, and machine learning. In this paper, we consider bilevel programs with continuous and discrete variables at both levels, with linear objectives and constraints (continuous upper level variables, if any, must not appear in the lower level problem). We propose a general-purpose branch-and-cut exact solution method based on several new classes of valid inequalities, which also exploits a very effective bilevel-specific preprocessing procedure. An extensive computational study is presented to evaluate the performance of various solution methods on a common testbed of more than 800 instances from the literature and 60 randomly generated instances. Our new algorithm consistently outperforms (often by a large margin) alternative state-of-the-art methods from the literature, including methods exploiting problem-specific information for special instance classes. In particular, it solves to optimality more than 300 previously unsolved instances from the literature. To foster research on this challenging topic, our solver is made publicly available online. The online appendix is available at https://doi.org/10.1287/opre.2017.1650 .
High-Sensitivity Cardiac Troponin I as a Gatekeeper for Coronary Computed Tomography Angiography and Stress Testing in Patients with Acute Chest Pain
Authors: Ferencik Maros , Mayrhofer Thomas , Lu Michael T , Woodard Pamela K , Truong Quynh A , Peacock W Frank , Bamberg Fabian , Sun Benjamin C , Fleg Jerome L , Nagurney John T , Udelson James E , Koenig Wolfgang , Januzzi James L , Hoffmann Udo 
Published: September 2017

Abstract

BACKGROUND
Most patients presenting to the emergency department (ED) with suspected acute coronary syndrome (ACS) undergo noninvasive cardiac testing with a low diagnostic yield. We determined whether a combination of high-sensitivity cardiac troponin I (hs-cTnI) and cardiovascular risk factors might improve selection of patients for cardiac testing.

METHODS
We included patients from the Rule Out Myocardial Infarction/Ischemia Using Computer Assisted Tomography (ROMICAT) I and II trials who presented to the ED with acute chest pain and were referred for cardiac testing. Based on serial hs-cTnI measurements and cardiovascular risk factors, we derived and validated the criterion for no need of cardiac testing. We predicted the effect of this criterion on the effectiveness of patient management.

RESULTS
A combination of baseline hs-cTnI (&lt;4 ng/L) and cardiovascular risk factors (&lt;2) ruled out ACS with a negative predictive value of 100% in ROMICAT I. We validated this criterion in ROMICAT II, identifying 29% patients as not needing cardiac testing. An additional 5% of patients were identified by adding no change or a decrease between baseline and 2 h hs-cTnI as a criterion. Assuming those patients would be discharged from the ED without cardiac testing, implementation of hs-cTnI would increase ED discharge rate (24.3% to 50.2%, P &lt; 0.001) and decrease the length of hospital stay (21.4 to 8.2 h, P &lt; 0.001), radiation dose (10.2 to 7.7 mSv, P &lt; 0.001), and costs of care (4066 to 3342 US$, P &lt; 0.001).

CONCLUSIONS
We derived and validated a criterion for combined hs-cTnI and cardiovascular risk factors that identified acute chest pain patients with no need for cardiac testing and could improve effectiveness of patient management. ClinicalTrials.gov Identifiers: NCT00990262 and NCT01084239
Vagrancy and the Fantasy of Unproductive Writing in David Copperfield
Authors: Willson Andrew 
Published: September 2017

Andrew Willson, “Vagrancy and the Fantasy of Unproductive Writing in David Copperfield” (pp. 192–217)
Recent criticism of Charles Dickens’s David Copperfield (1849–50) has often drawn attention to the eponymous character’s rise to respectable and productive professional authorship. This essay, however, considers the fact that one of David’s most formative experiences, the flight from London to Dover that removes him from the blacking warehouse and sets him on the path to a middle-class life, casts him as an instance of the most disrespectable, unproductive member of Victorian society: the vagrant who chooses not to work. As invested, then, as David Copperfield is in promoting traditional Victorian values such as earnestness and industriousness, it is equally committed to recuperating the value of unproductive acts in an industrial society. Yet, as the novel itself is evidence of Dickens’s abundant productivity, it clearly cannot do so without complications. From the complexities inherent in Dickens’s competing fascinations with participating in and escaping from the economic sphere, this essay argues, a picture emerges of the imaginative tools that Dickens uses to conceptualize literary value and provide solutions for his vexed relationship to the market. In David Copperfield, Dickens uses David’s vagrancy and mediating effects as narrator to suggest that even though his own novel is produced for the market, it is not defined by the market’s logic.
Assessing the efficiency of science, technology and innovation using Data Envelopment Analysis (DEA): The case of Colombia
Authors: Aristizábal-Torres Daniel , Castro-Peña Monica Yuleni , Echeverri-Gutierrez Paola Andrea , Valencia-Salazar Jesús David 
Published: September 2017

Se plantea una aproximación de medición de la eficiencia de la producción científica mediante el Data Envelopment Analysis (DEA): modelos CCR y Assurance Region (AR) con base en los indicadores de ciencia, tecnología e innovación (CTI) en los departamentos y en el Distrito Capital (D.C.) de Colombia. Se concluyó que ambos modelos calculan la eficiencia de las unidades de análisis, siendo AR susceptible a jerarquizaciones generadas en las variables de acuerdo a los objetivos país en temas de CTI.
Evaluating supervised learning approaches for spatial-domain multi-focus image fusion
Authors: Atencio Ortiz Pedro , Sanchez German , Branch Bedoya John William 
Published: September 2017

La fusión de imágenes genera una imagen que combina las características más relevantes de un conjunto de imágenes de la misma escena adquiridas con diferentes cámaras o configuraciones. La Fusión de Imágenes Multifoco (MFIF) parte de un conjunto de imágenes con diferente distancia focal para generar una imagen con una profundidad de campo extendida. Lo que constituye una solución al problema de la profundidad de campo limitada en la configuración de un sistema óptico. La literatura muestra una amplia variedad de trabajos que abordan este problema. Las transformaciones de dominios y el análisis de bloques de píxeles son la base de los principales enfoques propuestos. En este trabajo se presenta una evaluación de diferentes sistemas de aprendizaje supervisado aplicados a MFIF, incluyendo k-vecinos más cercanos, análisis discriminante lineal, redes neuronales y máquinas de soporte vectorial. El método inicia con dos imágenes de la misma escena, pero con diferentes distancias focales que se dividen en regiones rectangulares. El objetivo principal del sistema de clasificación, que está basado en aprendizaje de máquina, es elegir las partes de ambas imágenes que deben estar en la imagen fusionada para obtener una imagen completamente enfocada. Para la cuantificación del enfoque se utilizaron las métricas más populares propuestas en la literatura como: la Energía Laplaciana, el Laplaciano Modificado por Suma y el Gradiente de Energía, entre otras. La evaluación del método propuesto incluye la fase de prueba de los clasificadores y las métricas de calidad de fusión utilizadas comúnmente en la investigación, tales como la fidelidad de la información visual y la característica de información mutua. Los resultados muestran que el concepto de clasificación automática puede abordar satisfactoriamente el problema MFIF.
Immobilization of recognition elements on a self-assembled monolayers bio-platform
Authors: Reyes-Cuellar Julia Constanza 
Published: September 2017

Los materiales funcionalizados por adsorción sobre capas autoensambladas de 3-aminopropiltrietoxisilano (APTS) en vidrio (vidrio amino-funcionalizado) sirven para inmovilizar biomoléculas en estructuras usadas para biosensores. Liposomas de polidiacetileno (lip-PDA-NHS) y Biotin PEGilado con NHS se inmovilizaron aprovechando el éster de succinimidilo; y sirvieron para reconocer Tirosinasa o streptavidina (SAV). Debido a la interacción liposoma-PDA-Ty, ocurrió un cambio en la planaridad de la cadena polimérica PDA, percibido como una transición de azul-a-rojo; mientras que, la biotina inmovilizada interactúo con SAV por afinidad biológica. La capacidad de detección del sistema se evaluó por espectroscopia UV-vis o por microscopia de fluorescencia. Las capas de APTS funcionalizadas con biomoléculas retuvieron la capacidad de reconocimiento colorimétrico después de la interacción biológica, permitiendo la fabricación de una matriz resistente a proteínas con una propiedad de bioafinidad. Esta química de superficies es simple y accesible para la modificación de substratos de vidrio, útiles en arreglos de bioplataformas ópticas.
Class A prediction of a retaining structure made by a pile curtain wall executed on a tropical soil
Authors: Ruge-Cárdenas Juan Carlos , Da Cunha Renato , Colmenares Julio Esteban , Mendoza Cristhian Camilo 
Published: September 2017

Algunas estructuras de contención de acuerdo con su diseño geotécnico y plan de construcción predefinido. Por supuesto, esto no extrapolable a todos los sitios de análisis, sin embargo, en Brasilia, donde predominan los suelos residuales y lateralizados, se obtienen las mejores resistencias mecánicas en los estratos porosos durante la estación seca. Esto significa que es controlada por la succión del suelo, es decir, el comportamiento del material presenta una dependencia de la respuesta no saturada del medio. En términos numéricos, para predecir el comportamiento suelo-estructura fue necesario incluir la interacción atmósfera-suelo en una herramienta computacional, utilizando un modelo hipoplástico. El trabajo detalla de esta manera las simulaciones numéricas de una estructura de retención fundada en el suelo tropical de Brasilia. La estructura fue monitoreada en términos de desplazamiento, a lo largo de las estaciones locales secas y húmedas, y fue simulada por una ley constitutiva calibrada mediante pruebas de laboratorio no saturadas.
Morfología y regulación urbana en la transformación de la ciudad. El caso de la Gran Área Metropolitana de Costa Rica
Authors: Von Breymann Miranda Helga 
Published: September 2017

El estudio sobre la forma urbana y los procesos de transformación de las ciudades ha permitido conocer más a fondo la naturaleza de estas conformaciones y las distintas problemáticas que las aquejan, así como también ha permitido comprender las consecuencias que el modelo de crecimiento seguido ha plasmado en la estructura física de la ciudad y en la calidad de vida de sus habitantes. Dentro de esta línea de investigación se enmarca el presente ensayo, el cual profundiza en un estudio de caso latinoamericano, exponiendo los efectos que la mala gestión del territorio y la débil ejecución de los instrumentos de planificación han tenido sobre la forma urbana y la calidad de vida de los habitantes de la Gran Área Metropolitana costarricense.
Solar resource classification in South Africa using a new index
Authors: Zhandire Evans 
Published: September 2017

This paper introduces a solar resource index that responds to site-specific sky conditions resulting from stochastic movement and evolution of clouds. The developed solar resource classification index called probability of persistence (POPD) had limited capabilities to distinguish persistent clear-sky conditions from persistent overcast-sky conditions. The metric proposed in this investigation, referred to as the solar utility index (SUI), seeks to extend the POPD index to a simple enough index that can singly discriminate different states of a solar resource. It gives a measure of the fractional time during which a solar resource exhibits predefined characteristics over a specific time period not exceeding the time interval between sunrise and sunset. These solar resource qualities, which are user-defined, measure: (1) the fluctuation characteristic of the solar resource magnitude, and (2) the solar resource diffuse and beam composition. Values of the indexes computed over daily time intervals of 7:00–17:00 apparent solar time were tested for their solar resource classification qualities. Five distinct classes using K-means clustering algorithm were identified for the solar radiation resource measured at eight stations in South Africa. The SUI was found to have superior solar resource discriminating and grouping abilities when compared with other indexes like POPD and fractal dimension.
A Festa de Nossa Senhora do Rosário dos Homens Pretos: memória, patrimônio e cultura popular
Authors: Maia Andrea Casa Nova , Souza Vitor Leandro de 
Published: September 2017

A tradicional Festa de Nossa Senhora do Rosário dos Homens Pretos, em Minas Gerais, é uma das mais importantes manifestações da cultura e da fé do povo mineiro. Os festejos têm, cada vez mais, se destacado pela manutenção das tradições afrodescendentes do estado pela oralidade, consolidando-se como um lugar de memória que reinventa suas tradições, a cada ano, no dia da coroação do rei e da rainha da festa de Nossa Senhora do Rosário dos Homens Pretos. Este trabalho é um dos resultados de uma experiência de pesquisa na região norte do estado de Minas Gerais, entre os municípios de Diamantina e Serro, em que pretendemos discutir a manutenção da Festa num cenário onde, cada vez mais, a intervenção turística e patrimonial e, por conseguinte, a espetacularização da cultura, apontam para – e conflitam com – a força da transmissão dos costumes e tradições religiosas tendo como via de transmissão a oralidade.
To engage or not to engage? That is the question. Students' Perceptions of Engagement at a West Midlands University
Authors: Beniston Jane , Harris Deborah 
Published: September 2017

As part of the REACT research team, students from Newman University embarked on a two-year research project which set out to explore and compare how the concept of student engagement was perceived by students who were involved in a range of undergraduate and postgraduate programmes. The rationale for undertaking the study was with a view to developing a shared understanding of student engagement across the institution, making student engagement more visible across the institution and ensuring that strategies implemented to encourage student engagement were fit for purpose, particularly for the ‘non-traditional’ student at Newman. Questionnaires were designed by students and staff to facilitate both quantitative and qualitative responses around the comparing and contrasting definitions of engagement from students. Student perspectives considered engagement usually at an academic level, with little knowledge and understanding of the wider opportunities for engagement. Data collected also identified that working with others was a key aspect of student engagement, but barriers were identified as to why students did not perceive social engagement as important.
The REACT Collaborative Development Programme: Bringing universities together to enhance student-engagement activities for the ‘hard to reach’
Authors: Dunne Elisabeth , Lowe Tom 
Published: September 2017

As outlined in the funding application to the Higher Education Funding Council for Engagement (HEFCE), the REACT programme was designed to “support the expansion of context-appropriate interventions to at least ten further universities through consultancy, workshops, mentoring of Student Unions and academic staff in other institutions, and working with students and student engagement practitioners to spread the interventions” (REACT, 2015). This aligned with other aims of the bid, including that REACT would: disseminate best practice in relation to the challenge of engaging those outside the usual ambit of Student Engagement (SE) activities; build communities of practice based on strong evidence; and provide consultancy support and proven approaches amongst at least ten UK universities. This paper highlights how the ‘REACT Collaborative Development Programme’ was designed to facilitate these aims, to build momentum and spread practice beyond the core of Winchester, Exeter and London Metropolitan universities. All aspects of the programme are outlined, from the initial ‘Expression of Interest’ to the collaborative process of putting together this issue of JEIPC as a final output of REACT.