bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intraductal Papillary Mucinous Neoplasms of The Pancreas: A Nationwide Registry-Based Study
Authors: Aronsson L. , Andersson B. , Andersson R. , Tingstedt B. , Bratlie S. O. , Ansari D. 
Published: April 2018

Background and Aims: To investigate the paraclinical and pathological features of surgically resected intraductal papillary mucinous neoplasms in Sweden. Materials and Methods: A review of prospectively collected data on patients undergoing pancreatic resection for a histopathologically verified intraductal papillary mucinous neoplasm between 2010 and 2016 was performed using the Swedish National Registry for Pancreatic and Periampullary Cancer. Results: A total of 3038 pancreatic resections were performed during the study period, of which 251 (8.3%) were due to intraductal papillary mucinous neoplasms. The intraductal papillary mucinous neoplasm cases comprised 227 noninvasive and 24 invasive lesions. There was an annual increase in the number of resected intraductal papillary mucinous neoplasms, from 13 in 2010 to 56 in 2016, and an increase in the proportion of intraductal papillary mucinous neoplasm to the total number of pancreatic resections (4.7%–11%). Biliary obstruction was the only independent predictor of invasive disease, with odds ratio 3.106 (p = 0.030). There was no difference in survival between low-, intermediate-, and high-grade dysplastic lesions (p = 0.417). However, once invasive, the prognosis was severely impacted (p < 0.001). Three-year survival was 90% for noninvasive intraductal papillary mucinous neoplasm and 39% for invasive intraductal papillary mucinous neoplasm. Survival was better in lymph node negative invasive intraductal papillary mucinous neoplasm (p = 0.021), but still dismal compared to noninvasive lesions (p < 0.001). Conclusion: The number of surgically resected intraductal papillary mucinous neoplasms is increasing in Sweden. Biliary obstruction is associated with invasive disease. Low-to-high-grade dysplastic intraductal papillary mucinous neoplasm has an excellent prognosis, while invasive intraductal papillary mucinous neoplasm has a poor survival rate.
Return to Play After Multiligament Knee Injuries in National Football League Athletes
Authors: Bakshi Neil K. , Khan Moin , Lee Simon , Finney Fred T. , Stotts Jeff , Sikka Robby S. , Bedi Asheesh 
Published: April 2018

Background: Return to play (RTP) of National Football League (NFL) athletes after isolated anterior cruciate ligament (ACL) tears has been reported. However, no studies have reported on RTP of NFL athletes after multiligament knee injuries. Hypotheses: NFL athletes with multiligament knee injuries have lower RTP rates and longer recoveries than athletes with isolated ACL tears. Second, athletes with ACL and medial collateral ligament (MCL) injuries will have higher RTP rates and shorter time to RTP than athletes with an ACL tear and posterolateral corner involvement. Study Design: Retrospective cohort study. Level of Evidence: Level 4. Methods: Publicly available NFL injury data were reviewed for all multiligament knee injuries incurred between 2000 and 2016 with RTP information. Athletes were excluded if RTP was limited for reasons unrelated to the injury. Extracted data included type of injury, RTP, time to RTP (days), number and percentage of games played, and performance. Results: A total of 50 NFL athletes with multiligament knee injuries met inclusion and exclusion criteria. The overall RTP rate was 64.0%. Athletes with ACL/MCL tears had an RTP rate of 70.8%, whereas athletes with ACL and posterior collateral ligament/lateral collateral ligament (PCL/LCL) tears had an RTP rate of 55.6% ( P = 0.26). Mean time to RTP for all 50 athletes was 388.71 ± 198.52 days. The mean time to RTP for athletes with ACL/MCL injuries was 305.1 ± 58.9 days, compared with 459.2 ± 245.1 days ( P = 0.004) and 609.3 ± 183.1 days ( P < 0.0001) for those with combined ACL and PCL/LCL injuries and frank knee dislocations, respectively. Athletes with ACL/MCL injuries were more likely to return to prior performance level (43.5%) than those with ACL and PCL/LCL injuries (18.5%) ( P < 0.001). Conclusion: The RTP rate for athletes with multiligament knee injuries is significantly less than the RTP rate for athletes with isolated ACL tears. In addition, athletes with ACL and MCL tears have a higher RTP rate, a significantly shorter time to RTP, and a greater likelihood of returning to prior performance than athletes with ACL and PCL/LCL tears. Clinical Relevance: Multiligament knee injuries significantly affect the ability of a football player to return to sport. ACL and MCL tears are associated with better RTP prognosis compared with ACL and PCL/LCL tears.
Analysis of glenohumeral morphological factors for anterior shoulder instability and rotator cuff tear by magnetic resonance imaging
Authors: Saygi B , Karahan N , Karakus O , Demir AI , Ozkan OC , Soylu-Boy FN 
Published: April 2018

Objective: The aim of this study was to investigate whether there are glenohumeral morphological differences between normal population, glenohumeral instability, and rotator cuff pathology. Method: In this study, shoulder magnetic resonance (MR) images of 150 patients were evaluated. Patients included in the study were studied in three groups of 50 individuals: patients with anterior shoulder instability in group 1, patients with rotator cuff tear in group 2, and control subjects without shoulder pathology in group 3. Results: There were statistically significant differences between groups in evaluations for glenoid version, glenoid coronal height, glenoid coronal diameter, humeral axial and coronal diameters, and coracohumeral interval distances. Significant differences were observed between groups 2 and 3 in glenoid axial diameter, glenoid coronal height, glenoid depth, humeral coronal diameter, and coracohumeral distances. Conclusion: The results obtained in this study suggest that glenoid version, glenoid coronal height and diameter, humeral diameter, and coracohumeral interval parameters in glenohumeral morphology-related parameters in patients with anterior instability are different from those of normal population and patients with rotator cuff pathology. In cases where there is a clinically difficult diagnosis, these radiological measurements will be helpful to clinicians in diagnosis and treatment planning, especially in cases of treatment-resistant cases.
On the Politics of Love and Trans-Migrant Theater in Germany
Authors: Landry Olivia 
Published: April 2018

AbstractWith a focus on Germany's first explicitly trans- play, Sasha Marianna Salzmann's 2016 Meteoriten (Meteorites), this article pursues the possibility of thinking about trans- and love as forces that at once ontologically transform and phenomenologically (re)orient us away from an “unchosen starting place” (Susan Stryker) and toward the possibility of joy embodied in Salzmann's figure of “the migrant of love.” Considered in a broader social and political context, this powerful tangle of trans- and love bears out against crisis politics in contemporary Germany and resonates well beyond the theater space. For theoretical grounding, the author turns to recent theories of love, in particular the work of Chela Sandoval, Michael Hardt and Antonio Negri, and Lauren Berlant, as a means of conceptualizing love as social will for political change.
How the “Non-duped” Pass
Authors: Cunningham Sidney 
Published: April 2018

Abstract
This essay responds to Slavoj Žižek's recent criticism of trans activism by arguing for an understanding of gendered recognition within the symbolic-social realm that goes beyond acknowledgment and acceptance of diverse gender identities without requiring the presumption of any biological or physical essence of gender. This model is defended through a review of social constructionist and psychoanalytic models of perception and gender attribution, and illustrated through examples drawn from ChaosLife and Eve's Apple—two Web comics by and about transgender people.
“What do you want us to call you?”
Authors: Green Jamison , Denny Dallas , Cromwell Jason 
Published: April 2018

Abstract
In 1998 the authors circulated a questionnaire asking transgender respondents their reactions to various and assorted terminology and usage, including information about what the respondents did and did not wish to be called (N = 134). The authors followed up with focus groups at two trans conferences and presented their results at the 2001 symposium of the Harry Benjamin International Gender Dysphoria Association. In 2011, to see how language usage had evolved, the authors circulated a similar questionnaire (N = 2,633) and presented those results at the 2011 symposium of the World Professional Association for Transgender Health. These results are now presented in print.
Impaired associative learning after chronic exposure to pesticides in young adult honey bees
Authors: Mengoni Goñalons Carolina , Farina Walter M. 
Published: April 2018

ABSTRACT
Neonicotinoids are the most widespread insecticides in agriculture, preferred for their low toxicity to mammals and their systemic nature. Nevertheless, there have been increasing concerns regarding their impact on non-target organisms. Glyphosate is also widely used in crops and, therefore, traces of this pesticide are likely to be found together with neonicotinoids. Although glyphosate is considered a herbicide, adverse effects have been found on animal species, including honey bees. Apis mellifera is one of the most important pollinators in agroecosystems and is exposed to both these pesticides. Traces can be found in nectar and pollen of flowers that honey bees visit, but also in honey stores inside the hive. Young workers, which perform in-hive tasks that are crucial for colony maintenance, are potentially exposed to both these contaminated resources. These workers present high plasticity and are susceptible to stimuli that can modulate their behaviour and impact on colony state. Therefore, by performing standardised assays to study sublethal effects of these pesticides, these bees can be used as bioindicators. We studied the effect of chronic joint exposure to field-realistic concentrations of the neonicotinoid imidacloprid and glyphosate on gustatory perception and olfactory learning. Both pesticides reduced sucrose responsiveness and had a negative effect on olfactory learning. Glyphosate also reduced food uptake during rearing. The results indicate differential susceptibility according to honey bee age. The two agrochemicals had adverse effects on different aspects of honey bee appetitive behaviour, which could have repercussions for food distribution, propagation of olfactory information and task coordination within the nest.
Missing the point: are journals using the ideal number of decimal places?
Authors: Barnett Adrian G 
Published: April 2018

Background:The scientific literature is growing in volume and reducing in readability. Poorly presented numbers decrease readability by either fatiguing the reader with too many decimal places, or confusing the reader by not using enough decimal places, and so making it difficult to comprehend differences between numbers. There are guidelines for the ideal number of decimal places, and in this paper I examine how often percents meet these guidelines.Methods:Percents were extracted from the abstracts of research articles published in 2017 in 23 selected journals. Percents were excluded if they referred to a statistical interval, typically a 95% confidence interval. Counts and percents were calculated for the number of percents using too few or too many decimal places, and these percents were compared between journals.Results:The sample had over 43,000 percents from around 9,500 abstracts. Only 55% of the percents were presented according to the guidelines. The most common issue was using too many decimal places (33%), rather than too few (12%). There was a wide variation in presentation between journals, with the range of ideal presentation from a low of 53% (JAMA) to a high of 80% (Lancet Planetary Health). Conclusions:Many percents did not adhere to the guidelines on using decimal places. Using the recommended number of decimal places would make papers easier to read and reduce the burden on readers, and potentially improve comprehension. It should be possible to provide automated feedback to authors on which numbers could be better presented.
Ethical considerations in Controlled Human Malaria Infection studies in low resource settings: Experiences and perceptions of study participants in a malaria Challenge study in Kenya
Authors: Njue Maureen , Njuguna Patricia , Kapulu Melissa C. , Sanga Gladys , Bejon Philip , Marsh Vicki , Molyneux Sassy , Kamuya Dorcas 
Published: April 2018

Background: The range and amount of volunteer infection studies, known as Controlled Human Infection Model (CHMI) studies, in Low-Middle Income Countries (LMICs) is increasing with rapid technological advancement, world-class laboratory facilities and increasing capacity development initiatives. However, the ethical issues these studies present in LMICs have not been empirically studied. We present findings of a descriptive social science study nested within a malaria volunteer infection study, on-going at the time of writing, at the KEMRI-Wellcome Trust Research Programme (KWTRP) on the Kenyan Coast. Methods: The study included non-participant observations, five group discussions with more than half of the CHMI study participants, two in-depth interviews with study team members, and an exit questionnaire administered to the participants. Results: Participants understood the key elements of the study, including that they would be deliberately infected with malaria parasites and may get malaria as a result, there would be regular blood draws, and they would spend up to 24 days in a residence facility away from their homes. The greatest motivation for participation was the monetary compensation of 20 USD per overnight stay given as a lump-sum at the end of their residency stay. Also appreciated were the health screening tests prior to enrolment and the positive relations with the study team. Concerns raised included the amount and regularity of blood draws experienced, and concerns that this type of research may feed into on-going rumours about research generally. Conclusion: With the increasing range and number of CHMI studies being conducted in LMICs, current ethical guidance for more than minimal risk studies is inadequate. This study highlights some of the ethical issues that could emerge in these settings, emphasizing the heavy responsibility placed on research review and regulatory systems, researchers and funders, as well as the importance of carefully tailored community engagement and consent processes.
Environmental Incidents and the Market Value of Firms: An Empirical Investigation in the Chinese Context
Authors: Lo Chris K. Y. , Tang Christopher S. , Zhou Yi , Yeung Andy C. L. , Fan Di 
Published: April 2018

We examine firms listed on the Shanghai/Shenzhen Stock Exchange to investigate stock market reactions to 294 Chinese manufacturing firms involved in 618 environmental incidents between 2006 and 2013. Through our event studies, we find empirical evidence of a significantly negative stock market reaction to announcements of environmental incidents. Our empirical analysis reveals that Chinese firms with a higher government share (of ownership) and recognition of social responsibility tend to be less affected by such incidents; however, Chinese firms with stronger personal political ties (i.e., top management teams or board members with concurrent or prior government appointments) are actually affected more when environmental incidents occur. Moreover, environmental incidents caused by Chinese firms can have a significantly negative impact on the market value of their overseas customers.The online appendix is available at https://doi.org/10.1287/msom.2017.0680 .
Economic and clinical comparison of 2-octyl cyanoacrylate/polymer mesh tape with skin staples in total knee replacement
Authors: Sutton Nadia , Schmitz Niels-Derrek , Johnston Stephen S. 
Published: April 2018

Objective: To compare economic and clinical outcomes between skin staples and 2-octyl cyanoacrylate plus polymer mesh tape, Dermabond Prineo skin closure system, (SCS) among patients undergoing total knee replacement (TKR). Method: Retrospective, observational study using the Premier Healthcare Database, which comprises hospital administrative and billing data for over 700 hospitals in the US. Patients selected for study had an elective hospital admission, with discharge occurring between January 2012 and September 2015, carrying primary ICD-9-CM procedure and diagnosis codes for TKR and osteoarthritis. Patients were classified into two mutually-exclusive groups based on billing records during the index admission: those with billing record(s) for the skin closure system (SCS group); and those with billing record(s) for skin staples (staple group). Primary outcomes were index admission's length of stay (LOS), total hospital costs, and discharge status (skilled nursing facility (SNF)/other versus home/home health-care); exploratory outcomes included operating room time (ORT) during index admission and 30, 60, and 90-day readmissions. The SCS and staple groups were propensity score matched (1:1/nearest neighbour/caliper=0.10) on patient, hospital, and provider characteristics. Multivariable regressions accounting for hospital-level clustering after matching were used to compare outcomes between study groups. Results: Each group comprised 971 patients (1942 total patients; mean age: 65.3 years; female: 63.5%). The groups were generally well-balanced on matching covariates: mean standardised difference calculated across 49 covariates=0.049. Compared with the staple group, the SCS group had statistically significant shorter LOS (2.8 days versus 3.2 days, p=0.002), lower rate of discharge to SNF/other versus home/home health-care (26.4% versus 38.5%, p=0.011), and lower rate of 30, 60, and 90-day readmissions (30-day, 1.8% versus 4.4%, p=0.006; 60-day, 3.0% versus 5.4%, p<0.001; 90-day, 5.4% versus 7.4%, p=0.016). Differences between the groups for other outcomes were not statistically significant. Conclusion: Among patients undergoing TKR, use of the SCS was associated with shorter LOS, less resource intensive discharge status, and lower rates of all-cause readmission as compared with skin staples.
Lie algebras of conservation laws of variational partial differential equations
Authors: Fiorani Emanuele , Germani Sandra , Spiro Andrea 
Published: April 2018

Abstract
We establish a version of Noether’s first Theorem according to which the (equivalence classes of) conserved quantities of given Euler–Lagrange equations in several independent variables are in one-to-one correspondence with the (equivalence classes of) vector fields satisfying an appropriate pair of geometric conditions, namely: (a) they preserve the class of vector fields tangent to holonomic submanifolds of a jet space; (b) they leave invariant the action from which the Euler–Lagrange equations are derived, modulo terms identically vanishing along holonomic submanifolds. Such a bijective correspondence Φ͠ between equivalence classes comes from an explicit (non-bijective) linear map Φ from vector fields into conserved differential operators, and not from a map into divergences of conserved operators as it occurs in other proofs of Noether’s Theorem. Where possible, claims are given a coordinate-free formulation and all proofs rely just on basic differential geometric properties of finite-dimensional manifolds.
A simple transformation independent method for outlier definition
Authors: Johansen Martin Berg , Christensen Peter Astrup 
Published: April 2018

Abstract

Background:
Definition and elimination of outliers is a key element for medical laboratories establishing or verifying reference intervals (RIs). Especially as inclusion of just a few outlying observations may seriously affect the determination of the reference limits. Many methods have been developed for definition of outliers. Several of these methods are developed for the normal distribution and often data require transformation before outlier elimination.

Methods:
We have developed a non-parametric transformation independent outlier definition. The new method relies on drawing reproducible histograms. This is done by using defined bin sizes above and below the median. The method is compared to the method recommended by CLSI/IFCC, which uses Box-Cox transformation (BCT) and Tukey’s fences for outlier definition. The comparison is done on eight simulated distributions and an indirect clinical datasets.

Results:
The comparison on simulated distributions shows that without outliers added the recommended method in general defines fewer outliers. However, when outliers are added on one side the proposed method often produces better results. With outliers on both sides the methods are equally good. Furthermore, it is found that the presence of outliers affects the BCT, and subsequently affects the determined limits of current recommended methods. This is especially seen in skewed distributions. The proposed outlier definition reproduced current RI limits on clinical data containing outliers.

Conclusions:
We find our simple transformation independent outlier detection method as good as or better than the currently recommended methods.
Situational Factors of Job Burnout in Polytechnic EGP Teachers: A Diary-Based Case Study in the Chinese Context
Authors: Gong Yanzhi , He Zhouchun 
Published: April 2018

Abstract
Job burnout is a synthetic syndrome of emotional exhaustion, depersonalization and reduced personal accomplishment. It has a time-linked and situation-specific nature by developing gradually and fluctuating with changes of environmental contributors. In this study, four related diary entries were analyzed narratively, written by a polytechnic teacher teaching English for General Purposes (EGP) in a semester, to verify the possible work-related situational factors causing job burnout of EGP teachers in the Chinese context. The results revealed ten environmental burnout elements, including overload, severity of students’ problem, lacking supervisors’ support, limited job autonomy, a stern hierarchical organizational system, and opaque operating rules. We interpreted the results in terms of teacher professional development and proposed that enhancing EGP teachers’ professional identity and revaluing the EGP course in polytechnics were the basic ways to mitigate burnout and improve English teachers’ professional development.
The Effect of Learners’ Autonomous Textbook Selection on Intermediate Iranian EFL Learners’ Speaking Ability
Authors: Farrokh Parisa 
Published: April 2018

Abstract
The ability to employ the language as a communicational tool often serves as a measure of one’s speaking success in the language learning class. This research sought to investigate the effect of learners’ autonomous textbook selection on the speaking ability of Iranian English as foreign language (EFL) learners. Moreover, finding and analyzing factors considered by the learners in selecting the textbooks were another aim of this research. Sixty Iranian intermediate EFL learners from the Simin Language Institute in Ramsar, Mazandaran, Iran, were selected as the participants of the study based on their scores on Oxford Placement Test. This test determines the level of the students’ English proficiency. These participants were randomly assigned into the control and experimental groups. An interview procedure was run as their pretest. The experimental group studied from their selected books, besides the researcher’s teaching in the class. After 16 sessions, a posttest, the same as the pretest, was run as well. The quantitative results indicated the superior performance of the experimental group over the control group. Furthermore, an analysis of the Litz’s (2000) questionnaire shows that learners considered criteria such as practical considerations, layout and design, activities, skills, language type, subject and content of the selected books.