bluuebunny/crossref_metadata_2025_split huggingface dataset:
Interaction in computer supported collaborative learning: an analysis of the implementation phase
Authors: Hernández-Sellés Núria , Muñoz-Carril Pablo-César , González-Sanmamed Mercedes 
Published: June 2020

AbstractThere is extensive research on interaction frameworks in distance education and studies in Computer Supported Collaborative Learning (CSCL) have also focused on establishing interaction models. There is still research to be done, though, in order to identify the elements that configure interaction to build up a framework for their integration, aligned with the learning goals. The purpose of this study is to understand the key elements that configure effective interaction in the implementation phase of CSCL and to analyze the different types of interactions that occur during collaborative learning processes. The study was designed under a non-experimental quantitative methodology and 106 learners answered a questionnaire after participating in 5 different higher education subjects implementing CSCL. A factorial analysis of results prove that students identify three types of interaction to be necessary during the implementation phase of collaboration in order to reach knowledge convergence: cognitive, social and organizational interaction. Therefore, instructors and institutions who wish to promote effective CSCL should bear in mind the learning goals together with the social and organizational aspects interwoven in the design, implementation and assessment phases of collaborative learning.
Multiple Otherness: Identity Politics in the Taiping Civil War
Authors: Jin Huan 
Published: June 2020

Abstract
During and after the Taiping Civil War (1851–64), the notion of the Other was implicated in the provocation and mediation of violence and, as a result, acquired a multitude of new meanings and manifestations. Focusing on the discourse surrounding the Taiping War, this article explores the multiple political, moral, and cultural implications embedded in the idea of otherness. Unpacking the propaganda discourse of both the Taiping rebels and the Qing government, the author investigates the making of the political enemy by opposing regimes. In particular, the construction of a religious and political enemy is vital to Taiping identity formation. The author focuses on marginal figures in historical and fictional accounts who traverse political boundaries and constitute a third category beyond demarcations of “us” and Other in Taiping propaganda and its Qing counterpart. In short stories, however, these figures are subject to moral judgment and thus subsumed under another form of normative narrative involving otherness. Only in the realm of fantasy and imagination are political and moral efforts to construct and modulate otherness finally called into question. This article explores the acute malleability of the Other during the violent and chaotic Taiping Civil War and in its aftermath.
Hoax as Method
Authors: Rea Christopher 
Published: June 2020

Abstract
The hoax is universally condemned as an underhanded method—a transaction that, while sometimes clever in design or execution, is injurious. Hoaxers act in bad faith, exploiting, and thus diminishing, the social trust society needs to function. Hoaxes harm individuals and undermine institutions, all the more reason to reconsider such deceptions from a functional, rather than purely moral, perspective. The hoax can be a method to do what? What are the outcomes of hoaxes, whether intended or unintended? This essay offers eight answers to these questions, drawing evidence from an array of Chinese writings and films. It argues that the hoax is a useful concept to explain certain practices, styles, and trends in Chinese literary history. Further it proposes that the hoax offers a theoretical paradigm for rethinking more venerated categories, such as creativity, art, and value, as well as method itself.
Postal recruitment for genetic studies of preterm birth: A feasibility study
Authors: Keag Oonagh E. , Murphy Lee , Bradley Aoibheann , Deakin Naomi , Whyte Sonia , Norman Jane E. , Stock Sarah J. 
Published: June 2020

Background: Preterm birth (PTB) represents the leading cause of neonatal death. Large-scale genetic studies are necessary to determine genetic influences on PTB risk, but prospective cohort studies are expensive and time-consuming. We investigated the feasibility of retrospective recruitment of post-partum women for efficient collection of genetic samples, with self-collected saliva for DNA extraction from themselves and their babies, alongside self-recollection of pregnancy and birth details to phenotype PTB. Methods: 708 women who had participated in the OPPTIMUM trial (a randomised trial of progesterone pessaries to prevent PTB [ISRCTN14568373]) and consented to further contact were invited to provide self-collected saliva from themselves and their babies. DNA was extracted from Oragene OG-500 (adults) and OG-575 (babies) saliva kits and the yield measured by Qubit. Samples were analysed using a panel of Taqman single nucleotide polymorphism (SNP) assays. A questionnaire designed to meet the minimum data set required for phenotyping PTB was included. Questionnaire responses were transcribed and analysed for concordance with prospective trial data using Cohen’s kappa (k). Results: Recruitment rate was 162/708 (23%) for self-collected saliva samples and 157/708 (22%) for questionnaire responses. 161 samples from the mother provided DNA with median yield 59.0µg (0.4-148.9µg). 156 samples were successfully genotyped (96.9%). 136 baby samples had a median yield 11.5µg (0.1-102.7µg); two samples failed DNA extraction. 131 baby samples (96.3%) were successfully genotyped. Concordance between self-recalled birth details and prospective birth details was excellent (k>0.75) in 4 out of 10 key fields for phenotyping PTB (mode of delivery, labour onset, ethnicity and maternal age at birth). Conclusion: This feasibility study demonstrates that self-collected DNA samples from mothers and babies were sufficient for genetic analysis but yields were variable. Self-recollection of pregnancy and birth details was inadequate for accurately phenotyping PTB, highlighting the need for alternative strategies for investigating genetic links with PTB.
Intervención temprana de la mordida cruzada por la pista directa de Planas: relato de siete años de seguimiento
Authors: Isper Garbin Artenio Jose , Wakayama Bruno , Saliba Tania Adas , Saliba Garbin Clea Adas 
Published: June 2020

Introducción: entre las maloclusiones, la mordida cruzada es la de mayor prevalencia entre los niños en edad preescolar y se considera la principal depreciadora del sistema estomatognático, con un alto riesgo de desarrollar secuelas musculoesqueléticas irreparables en la edad adulta. Por lo tanto, es fundamental elegir un tratamiento eficaz que no requiera la cooperación directa del paciente y que utilice técnicas simples de ortodoncia. El objetivo de este artículo es informar la eficacia del tratamiento de rehabilitación neuroclusal (RNO) con la técnica de las pistas directas de Planas en la corrección temprana de la mordida cruzada posterior y el seguimiento de su estabilidad oclusal durante siete años. Presentación del caso: niña de 4 años de edad, que usó biberón, diagnosticada con mordida cruzada posterior funcional unilateral izquierda y desviación de la línea media. Para el tratamiento de la rno, se realizaron los ajustes oclusales en los dientes 63, 64 y 65, y después de la desprogramación neuromuscular, se confeccionaron las pistas directas de Planas en los dientes cruzados. Después de 29 días, se corrigió la mordida y se hicieron ajustes oclusales para proporcionar una mayor armonía oclusal. Hubo monitoreamiento cada seis meses durante siete años para verificar el equilibrio y la estabilidad del tratamiento. Conclusiones: a RNO con el uso de pista directa de Planas fue eficaz para corregir la mordida cruzada posterior con una técnica simple y de bajo costo que puede ejecutar el clínico general.
Ten years on: increased metal ion levels in a cohort of patients who underwent uncemented metal-on-polyethylene total hip arthroplasty
Authors: Dover Caroline , Kuiper Jan Herman , Craig Peter , Shaylor Phillip 
Published: June 2020

Aims We have previously demonstrated raised cobalt and chromium levels in patients with larger diameter femoral heads, following metal-on-polyethylene uncemented total hip arthroplasty. Further data have been collected, to see whether these associations have altered with time and to determine the long-term implications for these patients and our practice. Methods Patients from our previous study who underwent Trident-Accolade primary total hip arthroplasties using a metal-on-polyethylene bearing in 2009 were reviewed. Patients were invited to have their cobalt and chromium levels retested, and were provided an Oxford Hip Score. Serum ion levels were then compared between groups (28 mm, 36 mm, and 40 mm heads) and over time. Results Metal ion levels were repeated in 33 patients. When comparing the results of serum metal ion levels over time, regardless of head size, there was a significant increase in both cobalt and chromium levels (p < 0.001). Two patients with larger head sizes had undergone revision arthroplasty with evidence of trunnion damage at surgery. Two patients within the 40 mm subgroup had metal ion levels above the MHRA (Medicines and Healthcare Products Regulatory Agency) threshold for detailed investigation. The increase in cobalt and chromium, when comparing the 36 mm and 40 mm groups with those of the 28 mm group, was not significant (36 mm vs 28 mm; p = 0.092/p = 0.191; 40 mm vs 28 mm; p = 0.200/p = 0.091, respectively). There was no difference, between femoral head sizes, when comparing outcome as measured by the Oxford Hip Score. Conclusion This study shows an increase in cobalt and chromium levels over time for all modular femoral head sizes in patients with metal-on-polyethylene bearings, with two patients demonstrating ion levels above the MHRA threshold for failure, and a further two patients requiring revision surgery. These results may have clinical implications regarding longer term follow-up of patients and future implant choice, particularly among younger patients. Cite this article: Bone Joint J 2020;102-B(7):832–837.
Outcomes of total hip arthroplasty using dual mobility components in patients with a femoral neck fracture
Authors: You Daniel , Sepehri Aresh , Kooner Sahil , Krzyzaniak Halli , Johal Herman , Duffy Paul , Schneider Prism , Powell James 
Published: June 2020

Aims Dislocation is the most common indication for further surgery following total hip arthroplasty (THA) when undertaken in patients with a femoral neck fracture. This study aimed to assess the complication rates of THA with dual mobility components (THA-DMC) following a femoral neck fracture and to compare outcomes between THA-DMC, conventional THA, and hemiarthroplasty (HA). Methods We performed a systematic review of all English language articles on THA-DMC published between 2010 and 2019 in the MEDLINE, EMBASE, and Cochrane databases. After the application of rigorous inclusion and exclusion criteria, 23 studies dealing with patients who underwent treatment for a femoral neck fracture using THA-DMC were analyzed for the rate of dislocation. Secondary outcomes included reoperation, periprosthetic fracture, infection, mortality, and functional outcome. The review included 7,189 patients with a mean age of 77.8 years (66.4 to 87.6) and a mean follow-up of 30.9 months (9.0 to 68.0). Results THA-DMC was associated with a significantly lower dislocation rate compared with both THA (OR 0.26; 95% CI 0.08 to 0.79) and HA (odds ratio (OR) 0.27; 95% confidence interval (CI) 0.15 to 0.50). The rate of large articulations and of intraprosthetic dislocation was 1.5% (n = 105) and 0.04% (n = 3) respectively. Conclusion THA-DMC when used in patients with a femoral neck fracture is associated with a lower dislocation rate compared with conventional arthroplasty options. There was no increase in the rates of other complication when THA-DMC was used. Future cost analysis and prospective, comparative studies are required to assess the potential benefit of using THA-DMC in these patients. Cite this article: Bone Joint J 2020;102-B(7):811–821.
Extremes of body mass index have significant impact on complications, readmissions, and utilization of post-acute services after primary total hip arthroplasty
Authors: Tompkins Geoffrey , Neighorn Chris , Li Hsin-Fang , Fleming Kevin , Lorish Tom , Duwelius Paul , Sypher Katie 
Published: June 2020

Aims High body mass index (BMI) is associated with increased rates of complications in primary total hip arthroplasty (THA), but less is known about its impact on cost. The effects of low BMI on outcomes and cost are less understood. This study evaluated the relationship between BMI, inpatient costs, complications, readmissions, and utilization of post-acute services. Methods A retrospective database analysis of 40,913 primary THAs performed between January 2013 and December 2017 in 29 hospitals was conducted. Operating time, length of stay (LOS), complication rate, 30-day readmission rate, inpatient cost, and utilization of post-acute services were measured and compared in relation to patient BMI. Results Mean operating time increased with BMI and for BMI > 50 kg/m2 was approximately twice that of BMI 10 kg/m2 to 15 kg/m2. Mean inpatient cost did not vary significantly with BMI. Mean total reimbursement was lowest for the lowest BMI cohort and increased with BMI. Mean LOS was greatest at the extremes of BMI (4.0 days for BMI 10 kg/m2 to 15 kg/m2; 3.75 days for BMI > 50 kg/m2) and twice that of normal BMI. Mean complication rates were greatest in the lowest BMI cohort (16% for BMI 10 kg/m2 to 15 kg/m2) and five times the mean rate of complications in the normal BMI cohorts. Furthermore, 30-day readmissions were greatest in the highest BMI cohort (10% for BMI > 50 kg/m2) and five times the rate for normal BMI patients. Conclusion LOS, complications, and 30-day readmissions all increase at the extremes of BMI and appear to be greater than those of patients with normal BMI. The lowest BMI patients had the lowest payment for inpatient stay yet were at considerable risk for complications and readmission. Patients with extreme BMI should be counselled about their increased risk of complications for THA and nutritional status/obesity optimized preoperatively if possible. Cite this article: Bone Joint J 2020;102-B(7 Supple B):62–70.
Have newer bearing surfaces changed expectations regarding the longevity of total hip arthroplasty?
Authors: Engh, Jr. Charles A. , McAsey Craig J. , Cororaton Agnes D. , Ho Henry , Hopper, Jr. Robert H. 
Published: June 2020

Aims The purpose of this study is to examine six types of bearing surfaces implanted at a single institution over three decades to determine whether the reasons for revision vary among the groups and how long it takes to identify differences in survival. Methods We considered six cohorts that included a total of 1,707 primary hips done between 1982 and 2010. These included 223 conventional polyethylene sterilized with γ irradiation in air (CPE-GA), 114 conventional polyethylene sterilized with gas plasma (CPE-GP), 116 crosslinked polyethylene (XLPE), 1,083 metal-on-metal (MOM), 90 ceramic-on-ceramic (COC), and 81 surface arthroplasties (SAs). With the exception of the COC, all other groups used cobalt-chromium (CoCr) femoral heads. The mean follow-up was 10 (0.008 to 35) years. Descriptive statistics with revisions per 100 component years (re/100 yr) and survival analysis with revision for any reason as the endpoint were used to compare bearing surfaces. Results XLPE liners demonstrated a lower cumulative incidence of revision at 15 years compared to the CPE-GA and CPE-GP groups owing to the absence of wear-related revisions (4% for XLPE vs 18%, p = 0.02, and 15%, p = 0.003, respectively). Revisions for adverse local tissue reactions occurred exclusively among the MOM (0.8 re/100 year) and SA groups (0.1 re/100 year). The revision rate for instability was lower among hips with 36 mm and larger head sizes compared to smaller head sizes (0.2% vs 2%, p < 0.001). Conclusion The introduction of XLPE has eliminated wear-related revisions through 15-year follow-up compared to CPE-GP and CPE-GA. Dislocation incidence has been reduced with the introduction of larger diameter heads but remains a persistent concern. The potential for adverse local tissue reactions with MOM requires continued follow-up. Cite this article: Bone Joint J 2020;102-B(7 Supple B):105–111.
Modelling changes in modular taper micromechanics due to surgeon assembly technique in total hip arthroplasty
Authors: Gustafson Jonathan A. , Pourzal Robin , Levine Brett R. , Jacobs Joshua J. , Lundberg Hannah J. 
Published: June 2020

Aims The aim of this study was to develop a novel computational model for estimating head/stem taper mechanics during different simulated assembly conditions. Methods Finite element models of generic cobalt-chromium (CoCr) heads on a titanium stem taper were developed and driven using dynamic assembly loads collected from clinicians. To verify contact mechanics at the taper interface, comparisons of deformed microgroove characteristics (height and width of microgrooves) were made between model estimates with those measured from five retrieved implants. Additionally, these models were used to assess the role of assembly technique—one-hit versus three-hits—on the taper interlock mechanical behaviour. Results The model compared well to deformed microgrooves from the retrieved implants, predicting changes in microgroove height (mean 1.1 μm (0.2 to 1.3)) and width (mean 7.5 μm (1.0 to 18.5)) within the range of measured changes in height (mean 1.4 μm (0.4 to 2.3); p = 0.109) and width (mean 12.0 μm (1.5 to 25.4); p = 0.470). Consistent with benchtop studies, our model found that increasing assembly load magnitude led to increased taper engagement, contact pressure, and permanent deformation of the stem taper microgrooves. Interestingly, our model found assemblies using three hits at low loads (4 kN) led to decreased taper engagement, contact pressures and microgroove deformations throughout the stem taper compared with tapers assembled with one hit at the same magnitude. Conclusion These findings suggest additional assembly hits at low loads lead to inferior taper interlock strength compared with one firm hit, which may be influenced by loading rate or material strain hardening. These unique models can estimate microgroove deformations representative of real contact mechanics seen on retrievals, which will enable us to better understand how both surgeon assembly techniques and implant design affect taper interlock strength. Cite this article: Bone Joint J 2020;102-B(7 Supple B):33–40.
Validación del cuestionario de competencia digital para futuros maestros mediante ecuaciones estructurales
Authors: Cabero-Almenara Julio , Barroso-Osuna Julio , Gutiérrez-Castillo Juan Jesús , Palacios-Rodríguez Antonio 
Published: June 2020

INTRODUCCION. La tecnología, como elemento necesario para el avance de la sociedad del Siglo XXI, ha asumido un papel fundamental en el entorno educativo. En esta línea, diferentes instituciones respaldan la importancia del desarrollo de la Competencia Digital para vivir, trabajar y aprender en la Sociedad del Conocimiento. Este trabajo analiza la fiabilidad y validez del “Cuestionario de Competencia Digital para Futuros Maestros”. Este instrumento está basado en los principales marcos de desarrollo de la competencia digital: estándares ISTE (Estados Unidos) e indicadores “DigComp” (Europa). Se concibe como una herramienta que permite al alumnado de magisterio una mejor comprensión de su nivel competencial, proporcionando una forma de autoevaluar sus fortalezas y necesidades o áreas de mejora de aprendizaje digital en distintas dimensiones: alfabetización tecnológica; comunicación y colaboración; búsqueda y tratamiento de la información; ciudadanía digital; creatividad e innovación. METODO. Para ello, se emplean técnicas de análisis factorial exploratorio (AFE) y análisis factorial confirmatorio (AFC) utilizando ecuaciones estructurales. En esta investigación participan 657 alumnos y alumnas del Grado en Educación Infantil y Grado en Educación Primaria de la Universidad de Sevilla. RESULTADOS. Los resultados demuestran la fiabilidad y validez del cuestionario además de las posibilidades que ofrece la metodología de validación mediante ecuaciones estructurales. Así mismo, se subraya la importancia de usar instrumentos de evaluación competencial con fundamentos confiables que avalen su uso. DISCUSIÓN. Finalmente, se reclama una mayor oferta formativa y metodología educativa basada en competencias que esté garantizada por herramientas fiables y válidas.
Adaptación metodológica en el diseño y desarrollo urbano de bajo impacto para el manejo de aguas pluviales en Colima, México
Authors: Isabeles Deniz Karen Gricela , Olavarría Sánchez Ángel Manuel , Quintanilla Montoya Ana Luz , Ríos Aguilar Jesús 
Published: June 2020

Contexto: Hoy en día, las ciudades requieren la implementación de nuevas experiencias de transformación urbana, debido a que la urbanización es responsable del 70 % de emisiones globales de CO2. El reto que confronta en materia urbana es hacer frente al CCG a nivel ciudad, mediante infraestructura multifuncional.
Método: El presente estudio se llevó a cabo bajo la perspectiva del diseño y desarrollo urbano de bajo impacto (LIUDD, por su sigla en inglés) contextualizando el marco francés de planeación urbana, en el cual, el manejo de agua es prioritario. La ciudad de Colima presenta un crecimiento horizontal desordenado y, en consecuencia, la extensión de áreas impermeables ha provocado escorrentías, inundaciones y congestionamiento vial.
Resultados: La zona norte-poniente presenta un área de oportunidad para tratar dichas problemáticas, como se analizó en esta investigación. La zona de estudio presenta un alto nivel de ocupación del suelo (COS=0,76-1,00) obteniendo un coeficiente de escorrentía CE=0,96. Además, presenta una baja densidad poblacional (51-100 hab/ha), con un 92 % de motorización. La vialidad ocupa el 91 % de la superficie de espacio público, por lo que representa un área de oportunidad para la infraestructura multifuncional. Se propone que mediante técnicas de drenaje urbano sostenible implementadas en vialidades principales, se reduzca el CE a 0,90, y el volumen de inundaciones en un 203 %, priorizando los modos activos de transporte.
Conclusiones: Desarrollar e implementar una gestión integral del agua, sustentada en un cuadro reglamentario que priorice el LIUDD, puede paliar el estrés hídrico en esta y otras ciudades con problemáticas comunes, mediante la creación de una coordinación integrada por representantes de diversos sectores. Lo anterior, con el objetivo de poder gestionar el espacio público, y de impulsar proyectos multifuncionales para manejo de aguas pluviales, movilidad y desarrollo urbano que puedan ser útiles en la aplicación de nuevas maneras de planificar nuestras ciudades y mitigar los riesgos climáticos.