bluuebunny/crossref_metadata_2025_split huggingface dataset:
An evaluation model based on procedural behaviors for predicting MOOC learning performance: students’ online learning behavior analytics and algorithms construction
Authors: Tong Yao , Zhan Zehui 
Published: February 2023

Purpose
The purpose of this study is to set up an evaluation model to predict massive open online courses (MOOC) learning performance by analyzing MOOC learners’ online learning behaviors, and comparing three algorithms – multiple linear regression (MLR), multilayer perceptron (MLP) and classification and regression tree (CART).

Design/methodology/approach
Through literature review and analysis of data correlation in the original database, a framework of online learning behavior indicators containing 26 behaviors was constructed. The degree of correlation with the final learning performance was analyzed based on learners’ system interaction behavior, resource interaction behavior, social interaction behavior and independent learning behavior. A total of 12 behaviors highly correlated to learning performance were extracted as major indicators, and the MLR method, MLP method and CART method were used as typical algorithms to evaluate learners’ MOOC learning performance.

Findings
The behavioral indicator framework constructed in this study can effectively analyze learners’ learning, and the evaluation model constructed using the MLP method (89.91%) and CART method (90.29%) can better achieve the prediction of MOOC learners’ learning performance than using MLR method (83.64%).

Originality/value
This study explores the patterns and characteristics among different learning behaviors and constructs an effective prediction model for MOOC learners’ learning performance, which can help teachers understand learners’ learning status, locate learners with learning difficulties promptly and provide targeted instructional interventions at the right time to improve teaching quality.
Introducing “navigating failure in ethnography”: a forum about failure in ethnographic research
Authors: Verbuyst Rafael , Galazka Anna Milena 
Published: February 2023

PurposeThe authors introduce a recurrent section for the Journal of Organizational Ethnography which scrutinizes the various manifestations and roles of failure in ethnographic research.Design/methodology/approachThe authors peruse a wide body of literature which tackles the role of failure in ethnographic research and draw on the experiences to argue for a more sustained and in-depth conversation on the topic.Findings“Failure” regularly occurs in ethnographic research, yet remains under-examined. Increased discussion on the topic will enrich debates on methodology and fieldwork in particular.Originality/valueWhile various scholars have commented on the role of “failure” in ethnographic research, an in-depth and sustained examination of the topic is lacking.
Damage characteristics of fabrics created by TASER probes
Authors: Cao Wanying , Liscio Eugene , Ruffo Hannah Elizabeth , Doucette Corrin Marie , Zhou Yu Ran 
Published: February 2023

AbstractTASER® weapons are conducted energy weapons (CEWs) that are frequently used by police departments around the world. CEWs can be deployed in two methods: drive stun application and probe deployment. This study aims to examine damages caused by TASER devices on fabrics and whether types of fabric material and TASER models could contribute to different damage features. Three types of white fabric were used, including 100% cotton, 100% polyester, and 65:35 polyester‐cotton blend. Three models: TASER X26P, TASER X2, and TASER 7 were shot onto each type of fabric, with five repetitions each. Each damaged area on the fabric caused by a probe is a sample (n = 90) and was examined with a Keyence digital microscope. Images were captured by the Keyence microscope and measurements were recorded, including damage dimensions, fabric condition, evidence of burning, and extra findings. The presence of fused yarn ends was found to be statistically significant across the fabric types, and no damage features were found that may assist in the identification of TASER models. Other damage features including damage dimensions, discoloration, and fiber deformation were not found to be showing apparent differences according to statistical analysis. The conclusions made by this research should be used with caution due to the small sample size.
Surgically retrieved spermatozoa for ICSI cycles in non‐azoospermic males with high sperm DNA fragmentation in semen
Authors: Esteves Sandro C. , Coimbra Igor , Hallak Jorge 
Published: February 2023

AbstractIntracytoplasmic sperm injection (ICSI) using surgically retrieved spermatozoa outside the classic context of azoospermia has been increasingly used to overcome infertility. The primary indications include high levels of sperm DNA damage in ejaculated spermatozoa and severe oligozoospermia or cryptozoospermia, particularly in couples with ICSI failure for no apparent reason. Current evidence suggests that surgically retrieved spermatozoa for ICSI in the above context improves outcomes, mainly concerning pregnancy and miscarriage rates. The reasons are not fully understood but may be related to the lower levels of DNA damage in spermatozoa retrieved from the testis compared with ejaculated counterparts. These findings are consistent with the notion that excessive sperm DNA damage can be a limiting factor responsible for the failure to conceive. Using testicular in preference of low‐quality ejaculated spermatozoa bypasses post‐testicular sperm DNA damage caused primarily by oxidative stress, thus increasing the likelihood of oocyte fertilization by genomically intact spermatozoa. Despite the overall favorable results, data remain limited, and mainly concern males with confirmed sperm DNA damage in the ejaculate. Additionally, information regarding the health of ICSI offspring resulting from the use of surgically retrieved spermatoa of non‐azoospermic males is still lacking. Efforts should be made to improve the male partner's reproductive health for safer ICSI utilization. A comprehensive andrological evaluation aiming to identify and treat the underlying male infertility factor contributing to sperm DNA damage is essential for achieving this goal.
A case report of gadopentetate dimeglumine‐induced cardiac arrest: Resuscitation using extracorporeal membrane oxygenation
Authors: Fang Honglong , Chen Juan , Luo Jian , Li Zhangping , Zhang Weiwen 
Published: February 2023

AbstractGadopentetate dimeglumine (Gd‐DTPA) is commonly used for enhancement in magnetic resonance imaging, but rarely causes serious adverse reactions. The patient presented in this report had a cardiac arrest and multiple organ dysfunction syndrome within a short time after administration of Gd‐DTPA. Immediately after receiving an intravenous injection of Gd‐DTPA, the patient felt nausea and chest tightness, and developed systemic erythema. He was successfully treated using veno‐arterial extracorporeal membrane oxygenation (ECMO) combined with continuous renal replacement therapy without any serious complications or neurological deficits. We report a patient who was successfully treated for Gd‐DTPA‐induced cardiac arrest with ECMO. Thus, ECMO may be an effective treatment for cardiac arrest secondary to anaphylaxis.
Heterogeneous heterogeneity by default: Testing categorical moderators in mixed‐effects meta‐analysis
Authors: Rodriguez Josue E. , Williams Donald R. , Bürkner Paul‐Christian 
Published: February 2023

AbstractCategorical moderators are often included in mixed‐effects meta‐analysis to explain heterogeneity in effect sizes. An assumption in tests of categorical moderator effects is that of a constant between‐study variance across all levels of the moderator. Although it rarely receives serious thought, there can be statistical ramifications to upholding this assumption. We propose that researchers should instead default to assuming unequal between‐study variances when analysing categorical moderators. To achieve this, we suggest using a mixed‐effects location‐scale model (MELSM) to allow group‐specific estimates for the between‐study variance. In two extensive simulation studies, we show that in terms of Type I error and statistical power, little is lost by using the MELSM for moderator tests, but there can be serious costs when an equal variance mixed‐effects model (MEM) is used. Most notably, in scenarios with balanced sample sizes or equal between‐study variance, the Type I error and power rates are nearly identical between the MEM and the MELSM. On the other hand, with imbalanced sample sizes and unequal variances, the Type I error rate under the MEM can be grossly inflated or overly conservative, whereas the MELSM does comparatively well in controlling the Type I error across the majority of cases. A notable exception where the MELSM did not clearly outperform the MEM was in the case of few studies (e.g., 5). With respect to power, the MELSM had similar or higher power than the MEM in conditions where the latter produced non‐inflated Type 1 error rates. Together, our results support the idea that assuming unequal between‐study variances is preferred as a default strategy when testing categorical moderators.
Improved status of the conservation reliant Oahu Elepaio through effective management and natural adaptation
Authors: VanderWerf Eric A. , Taylor Philip E. , Rohrer Jobriath L. , Dittmar Erika , Burt Matthew D. 
Published: February 2023

AbstractThe Oahu Elepaio (Chasiempis ibidis) is an endangered forest bird endemic to the Hawaiian island of Oahu. The two most serious threats to the Oahu Elepaio are nest predation by nonnative black rats (Rattus rattus) and avian pox (Avipoxvirus spp.), a disease carried by nonnative mosquitoes. The Oahu Elepaio is conservation reliant because its continued existence depends on rat control. We used 27 years of data from 1995 to 2021 on pox prevalence, nest success, and fecundity with versus without rat control to reexamine the severity of these threats. Prevalence of avian pox declined over time. From 1995 to 2004, pox prevalence averaged 21% ± 4% per year and was positively related to annual rainfall. From 2005 to 2021, pox prevalence was only 2% ± 0.1% and despite several wet years there was no relationship with rainfall. The Oahu Elepaio appears to have evolved resistance to the pox variant currently in Hawaii. Elepaio nest success was higher with rat control (58% ± 1%) than without rat control (42% ± 6%). Nest success did not differ significantly between native tree species (52% ± 6%) and nonnative tree species (58% ± 6%) or between fruiting tree species (58% ± 1%) and nonfruiting species (61% ± 6%). Elepaio annual fecundity was higher with rat control (0.78 ± 0.02) than without rat control (0.48 ± 0.04) and varied among sites and years. The two primary threats to the species have been ameliorated through a combination of effective management and natural adaptation. The species' status should continue to improve if management is maintained, and someday, if patterns of natural adaptation continue, it could break free from conservation reliance.
Variation in adult living donor liver transplantation in the United States: Identifying opportunities for increased utilization
Authors: Lentine Krista L. , Tanaka Tomohiro , Xiao Huiling , Bittermann Therese , Dew Mary Amanda , Schnitzler Mark A. , Olthoff Kim M. , Locke Jayme E. , Emre Sukru , Hunt Heather F. , Liapakis AnnMarie , Axelrod David A. 
Published: February 2023

AbstractIn the United States, living donor liver transplantation (LDLT) is limited to transplant centers with specific experience. However, the impact of recipient characteristics on procedure selection (LDLT vs. deceased donor liver transplant [DDLT]) within these centers has not been described. Transplant registry data for centers that performed ≥1 LDLT in 2002–2019 were analyzed using hierarchal regression modeling to quantify the impact of patient and center factors on the adjusted odds ratio (aOR) of LDLT (vs DDLT). Among 73,681 adult recipients, only 4% underwent LDLT, varying from <1% to >60% of total liver transplants. After risk adjustment, the likelihood of receiving an LDLT rose by 73% in recent years (aOR 1.73 for 2014‐2019 vs. 2002‐2007) but remained lower for older adults, men, racial and ethnic minorities, and obese patients. LDLT was less commonly used in patients with hepatocellular carcinoma or alcoholic cirrhosis, and more frequently in those with hepatitis C and with lower severity of illness (Model for End‐Stage Liver Disease (MELD) score < 15). Patients with public insurance, lower educational achievement, and residence in the Northwest and Southeast had decreased access. While some differences in access to LDLT reflect clinical factors, further exploration into disparities in LDLT utilization based on center practice and socioeconomic determinants of health is needed.
Papillary dermal elastolysis histopathology mimicking folliculotropic mycosis fungoides
Authors: Recio‐Monescillo Miguel , Torre‐Castro Juan , Manzanas Carolina , Ruffin Belen , Haya Lara , Rodríguez Pinilla Maria , Requena Luis 
Published: February 2023

AbstractPapillary dermal elastolysis is a rare acquired disease of the elastic tissue that mainly affects elderly women with a clinical presentation of small firm papules in the neck, the supraclavicular areas and the upper back. Histopathologically, it is characteristic to find a complete or almost complete absence of elastic fibers in the papillary dermis with stains such as orcein or Verhoeff‐Van Gieson. We present the case of an adult female patient presenting a clinical picture of years of evolution of elastic skin‐colored papules on her neck, occasionally pruritic. Two biopsies were performed. In one of them an inflammatory infiltrate affecting the hair follicles was observed, and she was diagnosed with mycosis fungoides. The other biopsy showed a total absence of elastic fibers in the papillary dermis and was diagnosed as elastolysis of the papillary dermis. In early stages of papillary dermal elastolysis, a perivascular and periadnexal lymphocytic inflammatory infiltrate has been described, as is the case described above. It is important for dermatopathologist to know this atypical but possible presentation, as it may require a differential diagnosis with other entities such as follicular mycosis fungoides.
The dynamics of the microbial community in fall armyworm Spodoptera frugiperda during a life cycle
Authors: Chen Jie , Ma Yunjie , Huang Shixuan , Li Jinbao , Zhang Yuhui , Wang Hezhen , Qi Guojun , Shi Qingxing , Zhang Zhenfei , Yang Meiyan , Chen Hongxin , Pang Rui 
Published: February 2023

AbstractThe fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), is a destructive pest that causes serious damage worldwide, particularly to maize cultivars. The microbiota of S. frugiperda might play a role in its development and adaptability to different environments. However, the dynamics of microbial communities in S. frugiperda during its life cycle remain poorly understood. In this study, we used the amplification of the 16S rRNA gene to characterize the microbiome of all developmental stages of S. frugiperda fed with maize and adults fed with an artificial diet. The microbial composition of maize leaves, soil, and artificial diet was analyzed. Alpha diversity indices indicated that the neonate and early‐phase larvae had higher bacterial diversity than late‐phase larvae, pupae, and adults, and the bacterial diversity of adults fed with natural leaves was higher than that of adults fed an artificial diet. Proteobacteria and Firmicutes were the major phyla found in most life stages of S. frugiperda, especially in adults, sixth instars, and pupae. Neonate and early‐phase larvae harbored a higher abundance of OD1 and microbes of unassigned taxonomy. A co‐occurrence network of the highly abundant genera within S. frugiperda was then constructed, which revealed a potential interaction between the microbiota in insects, such as Enterococcus and Pseudomonas, and the dietary microbiota. Dynamic changes in bacterial communities led to changes in the metabolic functions of the microbiota across developmental stages. The genera OD1, Enterococcus, Comamonas, and Elizabethkingia were estimated to contribute to most of the functional changes in the microbiota of S. frugiperda. Our findings provide a comprehensive understanding of the composition of S. frugiperda and its dynamic interaction with dietary microbiota.
Causal Inference and COVID: Contrasting Methods for Evaluating Pandemic Impacts Using State Assessments
Authors: Shear Benjamin R. 
Published: February 2023

AbstractIn the spring of 2021, just 1 year after schools were forced to close for COVID‐19, state assessments were administered at great expense to provide data about impacts of the pandemic on student learning and to help target resources where they were most needed. Using state assessment data from Colorado, this article describes the biggest threats to making valid inferences about student learning to study pandemic impacts using state assessment data: measurement artifacts affecting the comparability of scores, secular trends, and changes in the tested population. The article compares three statistical approaches (the Fair Trend, baseline student growth percentiles, and multiple regression with demographic covariates) that can support more valid inferences about student learning during the pandemic and in other scenarios in which the tested population changes over time. All three approaches lead to similar inferences about statewide student performance but can lead to very different inferences about student subgroups. Results show that controlling statistically for prepandemic demographic differences can reverse the conclusions about groups most affected by the pandemic and decisions about prioritizing resources.
The Internet as a social institution: Rethinking concepts for family scholarship
Authors: Longo Gina Marie 
Published: February 2023

AbstractObjectiveI evaluate multidisciplinary scholarship on the Internet, the family, and adjacent institutions, comparing their findings to Patricia Yancy Martin's (2004) 14 criteria of social institutions to demonstrate how the Internet represents a new social institution and how that impacts the institution of family in the digital age.BackgroundScholars have called for investigations into the effects of the Internet on family life. This study aims to show how reimagining the Internet as an institution better reveals its complexities and embeddedness in other institutional spaces that shape the family and how.MethodUsing Martin's descriptions of the 14 characteristics of a social institution, I reviewed 85 peer‐reviewed, cross‐disciplinary studies focusing on the Internet and the family for themes that indicated the presence or absence of each criterion.ResultsData analysis revealed that the Internet functions as a social institution, which mutually influences and shapes the institution of family and its overlapping social dynamics. Fifty‐seven cases had all 14 criteria, and 19 cases had 13 criteria. Six had 12 criteria, and only three had 11 criteria.ConclusionThe foundational qualities of the Internet as an institution center the digital space as an active site of social change, where the power dynamics, identities, and practices of “doing family” within digital communities extend beyond those present to others elsewhere.ImplicationsThis reconceptualization provides practitioners with new approaches and insights into how digital spaces impact family outcomes and influence the ways in which groups “do” and define family across other institutional areas, even when the Internet is not directly implicated.
Failure mechanism of HR3C austenitic steel during creep at 650°C
Authors: Wang Xiao , Wan Xiaofeng , Liu Yu , Zhu Yu , Zhang Fubao , Lv Shuaishuai , Zhang Yuetao , Du Zechen 
Published: February 2023

AbstractThis paper investigates the intergranular failure and degradation process of HR3C steel during creep. Substantial microscopic information for the morphological and compositional characteristics of intergranular precipitates were revealed here. The results showed that the intergranular M23C6 carbides precipitated progressively, resulting in a formation of Cr‐depleted region, and coexist with the NbCrN phase at the grain boundary. Besides, the dislocation configuration and density of HR3C steel also changed remarkably after creep, which manifests that the increase of lattice debonding extent and irregular atoms array. The intergranular damage of the M23C6 matrix interface was revealed by the HRTEM observation, and the main damage features were the volumetric defect generation as well as the large‐area distortion of atom lattice around the M23C6, which would contribute to the intergranular crack forming at the end of creep stage.
Angiojet™ mechanical thrombectomy‐induced hemolysis triggering blood‐leak alarms
Authors: Selvananthan Babitha , Aziz Omar , Lee Arvind D. , Werner‐Gibbings Keagan , Bose Bhadran , Sud Kamal 
Published: February 2023

AbstractBlood leak alarms are increasingly rare and may be triggered by rupture of the dialyzer membrane, or intravascular hemolysis. We report two patients who developed hemolysis following Angiojet™ thrombolysis and thrombectomy of thrombosed arteriovenous fistulas, triggering blood leak alarms on hemodialysis, the occurrence of which has not been reported before. AngioJet™‐induced hemolysis should be considered in the differential diagnosis for blood leak alarms occurring soon after an intervention on an arterio‐venous (AV) fistula.
Plataformas digitales y transformación del trabajo autónomo en la Federación de Rusia: análisis longitudinal a lo largo de un decenio
Authors: SHEVCHUK Andrey , STREBKOV Denis 
Published: February 2023

ResumenEn este artículo se estudia la evolución del mercado de trabajo en línea en la Federación de Rusia y todo el espacio postsoviético, a partir de datos únicos obtenidos mediante cuatro rondas de encuestas realizadas en 2009, 2011, 2014 y 2019 en la principal plataforma rusófona de trabajo creativo basado en conocimientos. Se observan algunas tendencias importantes: descentralización espacial, diversificación ocupacional, feminización, maduración, aumento del nivel de estudios y desajuste de la calificación, consolidación de la vida profesional autónoma, plataformización y legalización. A la luz de esos resultados, se analizan sus posibles repercusiones en materia de políticas para el futuro desarrollo del trabajo de plataformas en la Federación de Rusia.
Cold sintering of bioglass and bioglass/polymer composites
Authors: Andrews Jessica , Bullock George , Miller Cheryl A. , Booth Jonathan , Ren Hong , Kelly Nicole L. , Hanna John V. , Reaney Ian M. 
Published: February 2023

AbstractBioactive glasses are widely utilized to regenerate bone tissue and aid bonding of orthopedic implants. Forming composites of bioglass with bioactive polymers allow the mechanical properties and biological response to be tailored. Although several methods for creating bioglass–polymer composites exist, they require dissolution of the polymer, controlled phase separation, and appear to have an upper limit of ∼30 vol.% bioglass. Cold sintering is a novel technique for the densification of ceramics and glasses which utilizes a liquid phase and pressure to allow the production of components at reduced temperatures. We demonstrate that cold sintering (100°C) of Bioglass 45S5 powder produced via flame spray pyrolysis and the fabrication of Bioglass 45S5–polymer composites. Assessment of the in vitro response revealed that composites were not cytotoxic. Solid‐state 31P and 29Si MAS NMR studies of the silicon and phosphorus speciation in the glass powder, as‐received, wetted, and sintered samples show similarities to reactions expected when bioglass is implanted in the body which along with Raman spectroscopy data gave insight into the cold sintering densification mechanism.