bluuebunny/crossref_metadata_2025 huggingface dataset:
A novel iterative learning control method and control system design for active magnetic bearing rotor imbalance of primary helium circulator in high-temperature gas-cooled reactor
Authors: Zheng Yangbo , Liu Xingnan , Zhao Jingjing , Mo Ni , Shi Zhengang
Published: January 2020

As one of the key technologies of high-temperature gas-cooled reactor, primary helium circulator–equipped active magnetic bearing provides driving force for primary helium cooling system. However, repetitive periodic vibration produced by rotor imbalance may introduce risks to primary helium circulator (even for high-temperature gas-cooled reactors). First, this article analyzes a periodic component extraction algorithm which is widely used in active magnetic bearing rotor unbalance control methods and points out the problem that the periodic component extraction algorithm occupies numerous computing resources which cannot satisfy the real-time request of active magnetic bearing control system. Then, a novel iterative learning control algorithm based on the iteration before last iteration of system information (iterative learning control-2) and a plug-in parallel control mechanism based on the existing control system are put forward, meanwhile, an integrated independent distributed active magnetic bearing control system is designed to solve the problem. Finally, both the simulation and experiment are carried out, respectively. The corresponding results show that the control method and control system proposed in this article have significant suppression effect on the repetitive periodic vibration of the active magnetic bearing system without degrading the real-time requirement and can provide important technical support for the safe and stable operation of the primary helium circulator in high-temperature gas-cooled reactor.
A new theoretical creep model of an epoxy-graphene composite based on experimental investigation: effect of graphene content
Authors: Khabaz-Aghdam Ata , Behjat Bashir , da Silva Lucas F M , Marques E A S
Published: January 2020

In this paper, the creep behavior of an epoxy-based adhesive reinforced with different weight fractions of graphene up to 0.5 wt% was studied. Creep tests were performed in three stress levels, using the ultimate strength of the neat epoxy as a reference. Results indicated that the presence of graphene up to 0.5 wt% reduces the creep strain and strain rate of the epoxy. However, the dominant behavior in the creep of epoxy–graphene composites is the creep pattern of the neat epoxy. These experimental observations led to development of theoretical creep models to an appropriate creep model for graphene-reinforced composites by introducing a new function of the graphene weight ratio. A scanning electron microscopy analysis indicated that the strong bond between the graphene surface and epoxy matrix limits the mobility of the molecular chains of the neat epoxy and therefore reduces the creep strain.
Newcomers and Old Timers: An Erroneous Assumption in Mental Health Services Research
Authors: Aneshensel Carol S. , van Draanen Jenna , Riess Helene , Villatoro Alice P.
Published: January 2020

Based on the premise that treatment changes people in ways that are consequential for subsequent treatment-seeking, we question the validity of an unrecognized and apparently inadvertent assumption in mental health services research conducted within a psychiatric epidemiology paradigm. This homogeneity assumption statistically constrains the effects of potential determinants of recent treatment to be identical for former patients and previously untreated persons by omitting treatment history or modeling only main effects. We test this assumption with data from the 2001–2003 Collaborative Psychiatric Epidemiology Surveys; the weighted pooled sample is representative of noninstitutionalized U.S. adults (18+; analytic n = 19,227). Contrary to the homogeneity assumption, some associations with recent treatment are conditional on past treatment, including psychiatric disorder and race-ethnicity—measures of need and treatment disparities, respectively. We conclude that the widespread application of the homogeneity assumption probably masks differences in the determinants of recent use between previously untreated persons and former patients.
Intergroup tolerance leads to subjective morality, which in turn is associated with (but does not lead to) reduced religiosity
Authors: Yilmaz Onurcan , Bahçekapili Hasan G , Harma Mehmet , Sevi Barış
Published: January 2020

Although the effect of religious belief on morally relevant behavior is well demonstrated, the reverse influence is less known. In this research, we examined the influence of morality on religious belief. In the first study, we used two samples from Turkey and the United States, and specifically tested the hypothesis that intergroup tolerance predicts a shift in meta-ethical views toward subjective morality, which in turn predicts decreased religious belief. To examine the relationship between intergroup tolerance and religiosity via subjective morality, a structural equation model (SEM) was run. SEM results yielded good fit to the data for both samples. Intergroup tolerance positively predicted subjective morality, and in turn, morality negatively predicted religiosity. The bias-corrected bootstrap analysis confirmed the mediation, indicating that the association between intergroup tolerance and religious belief was mediated via subjective morality. In Study 2, we probed for the causal relationship, and the results showed that manipulating intergroup tolerance increases subjective morality, but does not influence religiosity. Therefore, we found only partial evidence for our proposed model that tolerance causally influences subjective morality, but not religiosity.
The trinitarian dance with culture: Trinity as the missiological optic for understanding culture
Authors: Smith John
Published: January 2020

In discussions of imago Dei, we largely confine ourselves to functional and moral affinity to God, that is that we have been made in God’s image with the result that obedience to God amounts to imitating his moral character and behavior. However, we need to add the existential affinity of God’s being to our understanding of God’s image in us, specifically the fact that he is both singular (in essence) and plural (in person). To some degree, people share God’s singular–plural quality and that one–many affinity can give great insight into gospel ministry. Moreover, as with the moral dimension of imago Dei, this singular–plural dimension also was marred by sin so that we, as individuals and as whole cultures, tend to lean toward one extreme or the other, toward singularity (unhealthy individualism) or plurality (monolithic communalism). The gospel of grace addresses both. Therefore, as we prepare to do ministry, we should study our audience to discern the existential lean of its own incarnation of imago Dei, so that we can best speak the gospel to fit audience need.
Adapting a Family-Focused Diabetes Prevention Program for a Federally Qualified Health Center: A Qualitative Report
Authors: Rivers Patrick , Hingle Melanie , Ruiz-Braun Griselda , Blew Robert , Mockbee Joy , Marrero David
Published: January 2020

Purpose

The purpose of the study was to explore the needs of high-risk Latinx/Hispanic women with a history of gestational diabetes who were patients at a Federally Qualified Health Center (FQHC) in anticipation of a future family-based program.

Methods

Six focus group studies were conducted in partnership with El Rio Community Health Center, an FQHC in Tucson, Arizona. Thirty-nine women participated, each identified as Latinx/Hispanic, self-reported a history of gestational diabetes or prediabetes, and had at least 1 child aged 8 to 13. Three investigators independently reviewed transcripts from the focus groups to identify themes that reflected thematic saturation from participants’ responses. Data coding and results were discussed as a group and any differences were collectively adjudicated.

Results

All participants had a family member with diabetes and worried about their and their immediate family members’ risk for developing the disease. The possible benefits of participating in a lifestyle prevention program were universally recognized, but multiple barriers to participation were described, including scheduling conflicts, access to childcare, transportation, and the need to involve additional family members to reinforce program objectives.

Conclusions

There is a strong willingness to participate in a diabetes prevention program among respondents, but to be successful, interventions must be tailored to specific needs and challenges. Trying to apply existing prevention curricula with low-income Latinx/Hispanic populations may not be successful without adaptations.
A closer look at attachment, sexuality, and couple relationships
Authors: Busby Dean M. , Hanna-Walker Veronica , Yorgason Jeremy B.
Published: January 2020

In this study, the relationships between attachment patterns and relationship outcomes were explored through the mechanism of sexuality with two large samples from the U.S. In the first sample ( N = 4,834), the associations between insecure attachment patterns, the number of committed and casual sexual partners, timing of sexual debut, and relationship status were explored. In the second sample, a nationally representative sample of recently married couples ( N = 4212), an actor–partner model was used to explore the associations with attachment on the number of sexual partners and sexual timing and their subsequent influence on relationship and sexual satisfaction over two time points. The results indicated that, for Sample 1, insecure attachment was associated with both the number of casual and committed sexual partners and an increased likelihood of being single for men and women. For Sample 2, the actor–partner measures of attachment were associated with relationship and sexual satisfaction over two time points but had weak associations with the number of sexual partners and sexual timing.
Association of energy drink consumption with substance-use initiation among adolescents: A 12-month longitudinal study
Authors: Galimov Artur , Hanewinkel Reiner , Hansen Julia , Unger Jennifer B , Sussman Steve , Morgenstern Matthis
Published: January 2020

Background:

Aggressive marketing has resulted in exponential growth of energy drink sales in recent years. Despite growing concerns about the negative health effects of energy drinks, they are increasingly popular among young people. Little is known about temporal associations between energy drink consumption and other drug use, though some researchers have suggested that energy drink consumption reflects an entry into a drug-using lifestyle.

Aims:

The purpose of this study was to evaluate whether energy drink use among adolescents who have never tried substances is associated with a risk of initiating tobacco (i.e. cigarettes, e-cigarettes, and hookah) and alcohol use.

Methods:

A school-based longitudinal study of 3071 adolescents ages 9–17 years was conducted in six federal states of Germany. Data analyses involved two assessment waves that took place approximately 12 months apart: baseline (fall-winter of school year 2016–2017), and 12-month follow-up (fall-winter of school year 2017–2018).

Results:

Multilevel models revealed that energy drink use at baseline was associated with cigarette (odds ratio for energy drink ever use, 3.15 (95% confidence interval, 2.07–4.78 )), e-cigarette (odds ratio, 4.32 (95% confidence interval, 2.87–6.51)), hookah smoking (odds ratio, 3.15 (95% confidence interval, 2.06–4.82)), and alcohol use (odds ratio, 2.26 (95% confidence interval, 1.75–2.93)) initiation within 12 months.

Conclusions:

These results raise the possibility that energy drinks may potentially act as a gateway drug to other substances. However, inferences regarding whether this association is or is not causal cannot yet be made.
Investigating serotonergic contributions to cognitive effort allocation, attention, and impulsive action in female rats
Authors: Silveira Mason M , Wittekindt Sebastian N , Mortazavi Leili , Hathaway Brett A , Winstanley Catharine A
Published: January 2020

Background:

Individuals must frequently evaluate whether it is worth allocating cognitive effort for desired outcomes. Motivational deficits are a common feature of psychiatric illness such as major depression. Selective serotonin reuptake inhibitors are commonly used to treat this disorder, yet some data suggest these compounds are ineffective at treating amotivation, and may even exacerbate it.

Aims:

Here we used the rodent Cognitive Effort Task (rCET) to assess serotonergic (5-hydroxytryptamine, 5-HT) contributions to decision-making with cognitive effort costs.

Methods:

The rCET is a modified version of the 5-choice serial reaction time task, a well-validated test of visuospatial attention and impulse control. At the start of each rCET trial, rats chose one of two levers, which set the difficulty of an attentional challenge, namely the localization of a visual stimulus illuminated for 0.2 or 1 s on hard versus easy trials. Successful completion of hard trials was rewarded with double the sugar pellets. Twenty-four female Long–Evans rats were trained on the rCET and systemically administered the 5-HT1A agonist 8-OH-DPAT, the 5-HT2A antagonist M100907, the 5-HT2C agonist Ro-60-0175, as well as the 5-HT2C antagonist SB 242, 084.

Results:

5-HT2A antagonism dose-dependently reduced premature responding, while 5-HT2C antagonism had the opposite effect. 8-OH-DPAT impaired accuracy of target detection at higher doses, while Ro-60-0175 dose-dependently improved accuracy on difficult trials. However, none of the drugs affected the rats’ choice of the harder option.

Conclusion:

When considered with existing work evaluating decision-making with physical effort costs, it appears that serotonergic signalling plays a minor role in guiding effort allocation.
Effects of desvenlafaxine versus placebo on MDD symptom clusters: A pooled analysis
Authors: Katzman Martin A , Wang Xuemei , Wajsbrot Dalia B , Boucher Matthieu
Published: January 2020

Background:

Major depressive disorder is characterized by the presence of at least five of nine specific symptoms that contribute to clinically significant functional impairment. This analysis examined the effect of desvenlafaxine (50 or 100 mg) versus placebo on symptom cluster scores and the association between early improvement in symptom clusters and symptomatic or functional remission at week 8.

Methods:

Using data from nine double-blind, placebo-controlled studies of desvenlafaxine for the treatment of major depressive disorder ( N=4317), the effect of desvenlafaxine 50 or 100 mg versus placebo on scores for symptom clusters based on 17-item Hamilton Rating Scale for Depression items was assessed using analysis of covariance. Association between early improvement in symptom clusters (⩾20% improvement from baseline at week 2) and symptomatic and functional remission (17-item Hamilton Rating Scale for Depression total score ⩽7; Sheehan Disability Scale score <7) at week 8 was analyzed using logistic regression. Symptom clusters based on Montgomery–Åsberg Depression Rating Scale were also examined.

Results:

Desvenlafaxine 50 or 100 mg was associated with significant improvement from baseline compared to placebo for all symptom clusters ( p<0.001), except a sleep cluster for desvenlafaxine 100 mg. For all symptom clusters, early improvement was significantly associated with achievement of symptomatic and functional remission at week 8 for all treatment groups ( p⩽0.0254).

Conclusion:

Early improvement in symptom clusters significantly predicts symptomatic or functional remission at week 8 in patients with depression receiving desvenlafaxine (50 or 100 mg) or placebo. Importantly, patients without early improvement were less likely to remit.
Translocator protein–mediated fast-onset antidepressant-like and memory-enhancing effects in chronically stressed mice
Authors: Shang Chao , Yao Ru-Meng , Guo Ying , Ding Zhen-Chun , Sun Li-Jun , Ran Yu-Hua , Xue Rui , Wang Huai-Shan , Zhang Jian-Min , Zhang You-Zhi , Zhang Li-Ming , Li Yun-Feng
Published: January 2020

Background:

Fast-acting and cognitive-enhancing antidepressants are desperately needed. Activation of translocator protein (18 kDa, TSPO) is a novel strategy for developing potential antidepressants, but there are no data available on the onset time of TSPO ligands. This study aimed to investigate the fast-onset antidepressant actions of AC-5216, a selective TSPO ligand, in TSPO knock-out (KO) mice.

Methods:

TSPO wild-type (WT) and KO mice were subjected to a six-week chronic unpredicted stress (CUS) paradigm. Then, the mice were treated with AC-5216 and tested with depressive and cognitive behaviours.

Results:

A single dose of AC-5216 (0.3 mg/kg) exerted anxiolytic- and antidepressant-like actions in TSPO WT mice. Moreover, in chronically stressed WT mice, two to four days of AC-5216 treatment (0.3 mg/kg, once per day) produced fast-onset antidepressant-like effects in the novelty-suppressed feeding and sucrose preference tests, as well as memory-enhancing effects in the novel object recognition test. In addition, a rapid (with five days of treatment) restoration of serum corticosterone levels and prefrontal cortex (PFC) allopregnanolone levels was found. Further studies showed that in these stress-exposed WT mice, AC-5216 significantly increased the levels of mTOR signalling-related proteins (mBDNF, p-mTOR, PSD-95, synapsin-1, GluR1), as well as the total dendritic length and branching points of pyramidal neurons in the PFC.

Conclusions:

These results suggest that TSPO mediates the fast-onset antidepressant-like and memory-enhancing effects of AC-5216, possibly through the rapid activation of mTOR signalling and restoration of dendritic complexity in the PFC.
The Biogeographical Foundations of African Marketing Systems
Authors: Ingenbleek Paul T. M.
Published: January 2020

The marketing literature is showing an increasing interest in Africa. This article addresses the contextual macro-level characteristics that such studies have in common, and traces the typical characteristics of African marketing systems back to their ultimately biogeographical foundations. These foundations include the north-south orientation of the main continental axis, the low presence of geological boundaries such as mountains and rivers, and Africa as the “cradle of mankind.” Through their evolutionary consequences, these factors evolved into the aggregate marketing system traits typical to Africa, which include the existence of multi-level markets connected by traders, a sharp distinction between the formal and informal sectors, and an overwhelming presence of micro-entrepreneurs and smallholder farmers. This analysis generates new insights into, among others, the role of biogeographical factors in marketing systems theory and the potential sources of competitive advantage and disadvantage for the endogenous African firms inherent to the system.
Physical geography contributes
Authors: Harden Carol P , Luzzadder-Beach Sheryl , MacDonald Glen M , Marston Richard A , Winkler Julie A
Published: January 2020

Physical geography is a process, conducted by people, of integration and synthesis of ideas and observations to advance scientific understanding of Earth’s surface and atmosphere and to apply this knowledge to the greater good of the planet and its people. Therefore, physical geography matters; that is, physical geography makes a difference to people and contributes to environmental decision making at various scales. Based upon presentations and discussion at the 2019 AAG Annual Meeting (see editorial above in this issue), we provide here a historical perspective and distillation of how and why, in our opinions, physical geography matters. Although we provide several specific examples, these represent only a small portion of the large body of excellent and relevant physical geography research.
Accuracy and Reliability of the Visual Assessment of Patellar Tracking
Authors: Best Matthew J. , Tanaka Miho J. , Demehri Shadpour , Cosgarea Andrew J.
Published: January 2020

Background:

Abnormal patellar tracking is described as a “J-sign” when the patella exhibits excessive lateral displacement during active knee extension.

Purpose:

To determine (1) the accuracy and reliability of the visual assessment of patellar tracking when viewed by surgeons with patellofemoral expertise and (2) whether surgeon experience (in years) correlates with the ability to accurately identify the presence and severity of patellar maltracking.

Study Design:

Cohort study (diagnosis); Level of evidence, 2.

Methods:

Using a web-based assessment, 32 orthopaedic surgeon members of the International Patellofemoral Study Group determined the presence or absence of maltracking (≥2 quadrants of lateral translation) in 10 single-knee videos of patients with patellar instability during active knee extension (qualitative analysis). Surgeons then graded patellar tracking in 20 single-knee videos as follows: 0 (<1 patellar quadrant of lateral translation), 1 (1 to <2 quadrants), 2 (2 to <3 quadrants), or 3 (≥3 quadrants) (quantitative analysis). Responses were compared with a previously described grading system using patellar bisect offset measured with 4-dimensional computed tomography. We evaluated the association between number of years of surgeon experience and the ability to correctly identify and grade patellar tracking. A total of 22 surgeons repeated the survey 3 months later, and their answers were matched to the first survey, allowing for assessment of intraobserver reliability.

Results:

In the qualitative analysis, surgeons correctly identified videos as showing patellar maltracking 68% of the time (κ = 0.45). In the quantitative analysis, 53%, 51%, 48%, and 68% of surgeons correctly identified maltracking of grades 3, 2, 1, and 0, respectively (κ = 0.42). Surgeon experience did not correlate with ability to identify the presence ( P = .59) or grade ( P = .35) of patellar maltracking. Respondent answers from the second survey demonstrated inadequate intraobserver reliability (κ = 0.48).

Conclusion:

Using visual assessment alone, surgeons correctly identified patellar maltracking in approximately two-thirds of videos and correctly graded patellar maltracking in half. Inter- and intraobserver reliability were inadequate to support the use of visual assessment alone for detecting the presence or grade of patellar maltracking. Surgeon experience did not correlate with ability to identify the presence or grade of patellar maltracking.
Networks, Power, and the Effects of Legitimacy in Contentious Politics
Authors: Schoon Eric W. , Joosse Alexandra Pocek , Milward H. Brinton
Published: January 2020

Legitimacy is widely theorized as shaping the dynamics of contentious politics, fostering support and stability for those involved while imposing behavioral constraints. Yet, empirical research reveals wide variation in how these effects are realized in practice. We contend that divergences in legitimacy’s effects are tied in fundamental ways to the relationship between actors engaged in contentious politics and their audience(s). We develop a framework that highlights three conditions shaping the effects of legitimacy—legitimacy type, network balance, and structural dependence—and use a comparative analysis of dyadic relationships of the Kurdistan Workers’ Party, the Revolutionary Armed Forces of Colombia, and Jemaah Islamiyah to illustrate how convergence and divergence in legitimacy’s effects are systematically structured by these conditions. Doing so advances scholarship on legitimacy in contentious politics by providing a basis for systematically comparing the effects of legitimacy across cases, situations, and historical contexts.
Digital Dating Abuse Among a National Sample of U.S. Youth
Authors: Hinduja Sameer , Patchin Justin W.
Published: January 2020

Digital dating abuse is a term used to describe physical, sexual, or psychological/emotional violence that occurs between romantic partners through the use of texting, social media, and related online mediums. Survey data were obtained from a nationally representative sample of 2,218 American middle and high school students (12–17 years old) who have been in a romantic relationship. About 28% of students in a relationship in the previous year had been the victim of digital dating abuse. Males were more likely to report having experienced it (32% compared to 24%), though no other demographic differences emerged. Several covariates did emerge as significantly related to experience with digital dating abuse, including depressive symptoms, sexual intercourse, sexting, and being the victim of cyberbullying. Experiencing offline dating abuse was by far the strongest correlate. Implications for prevention and policy within schools and the community are discussed, along with considerations for future research in this important area.
Examining the Effectiveness of TASERS® at Gaining Citizen Compliance
Authors: Somers Logan J. , Terrill William , Rossler Michael T. , Ingram Jason R.
Published: January 2020

Since their emergence within the field of policing, the use of conducted energy devices (CEDs) has produced a great deal of debate. However, few empirically rigorous studies have shed light on the extent to which CEDs (e.g., TASERs) are actually successful at gaining citizen compliance. As such, we examine 918 TASER cases collected from three police agencies to assess effectiveness in relation to citizen compliance. Findings demonstrate that officers generally classify the TASER as effective, but the level of effectiveness varies depending on whether it was used in probe or drive-stun mode. Multivariate regression models also identify a number of significant variables related to TASER effectiveness, including citizen (e.g., height, weight, gender, impairment) and officer (e.g., gender) characteristics. We discuss the findings in relation to those found in prior studies, as well as implications for research, policy, and practice.
Effects of aging process and testing temperature on the open-hole compressive properties of a carbon fiber composite
Authors: Xu Liang , He Yi , Ma Shaohua , Hui Li , Jia Yaoxiong , Tu Yiming
Published: January 2020

The properties of T800 carbon fiber–epoxy composite specimens with a hole were studied in terms of mass change, scanning electron microscopy, glass transition temperature ( T g), heat-resistant temperature, Fourier-transform infrared (FTIR) spectroscopy, open-hole compressive strength at different temperatures, and stereomicroscopic observations after being subjected to hygrothermal aging and thermal-oxidative aging processes. FTIR spectra indicated that after hygrothermal aging at 70°C and 85% relative humidity (RH), chemical aging did not occur, whereas after thermal-oxidative aging at 190°C, the specimens exhibited chemical aging. The unaged specimens had a T g of 229°C and an extreme heat-resistant temperature T gmod of 184°C; after hygrothermal aging, the specimens had a T g and T gmod of 207°C and 143°C, respectively; and after thermal-oxidative aging, the specimens had a T g and T gmod of 252°C and 215°C, respectively. The effects of temperature on open-hole compressive strength were evaluated at room temperature of 23°C, 50°C, 100°C, 150°C, and 200°C. The compressive strengths of the specimens decreased after aging and with the increasing test temperature. At the highest test temperature, the unaged specimens, hygrothermal-aged, and thermal-oxidative-aged specimens retained over 73.7%, 65.5%, and 67.9%, respectively, of their compressive strength. Thus, the T800 carbon fiber–epoxy composite evaluated in this study exhibited good resistance to the effects of aging and high temperature. These results should be beneficial to the understanding of the long-term performance of composites.
Improved dynamic cutting force modelling in micro milling of metal matrix composites Part I: Theoretical model and simulations
Authors: Niu Zhichao , Cheng Kai
Published: January 2020

Cutting force modelling for micro machining is of great importance for better understanding of the cutting mechanics in the process. As precision machining of metal matrix composites (MMCs) is much more complex than machining homogeneous materials, the accurate prediction of cutting force is critical to control the cutting performance and tooling life. This paper presents an improved theoretical dynamic cutting force model in MMCs micro milling process by using straight flute PCD end mills. The theoretical model is modified and improved based on the conventional milling force modelling while taking account of various factors including tooling geometries, the material microstructure, size effect and chip formation in the cutting process. An innovative expression on dynamic cutting force in micromachining MMCs is presented through the multiscale modelling and analysis. The cutting force coefficients are further defined through instantaneous cutting force signals analysis. Simulation results under varied cutting process variables are presented against a series of MMCs micro milling trials, which indicate that the improved dynamic cutting force model can predict the cutting force accurately and reveal more details on the cutting force variations in the process due to the material inhomogeneous nature. In addition, the optimal process variables can be readily explored through the dynamic force modelling and simulations so as to further improve the cutting performance.
Implicit Gender Bias in Linguistic Descriptions for Expected Events: The Cases of the 2016 United States and 2017 United Kingdom Elections
Authors: von der Malsburg Titus , Poppels Till , Levy Roger P.
Published: January 2020

Gender stereotypes influence subjective beliefs about the world, and this is reflected in our use of language. But do gender biases in language transparently reflect subjective beliefs? Or is the process of translating thought to language itself biased? During the 2016 United States ( N = 24,863) and 2017 United Kingdom ( N = 2,609) electoral campaigns, we compared participants’ beliefs about the gender of the next head of government with their use and interpretation of pronouns referring to the next head of government. In the United States, even when the female candidate was expected to win, she pronouns were rarely produced and induced substantial comprehension disruption. In the United Kingdom, where the incumbent female candidate was heavily favored, she pronouns were preferred in production but yielded no comprehension advantage. These and other findings suggest that the language system itself is a source of implicit biases above and beyond previously known biases, such as those measured by the Implicit Association Test.
Holocene climate variability and Indian Summer Monsoon: An overview
Authors: Banerji Upasana S , Arulbalaji P , Padmalal D
Published: January 2020

The response of the Indian Summer Monsoon (ISM) to forcing factors and climate variables has not yet fully explored, even though the ISM plays a pivotal role in the socio-economics of the Indian subcontinent and nearby areas. The ISM progression over Indian landmass is a manifestation of the Intertropical Convergence Zone (ITCZ) migration over the northern Indian Ocean and the Indian subcontinent. The recent anomalous behaviour of ISM raises the need for a better understanding of its spatio-temporal changes during the ongoing interglacial period termed as the Holocene period. The Holocene period has been classified further based on the globally observed abrupt climatic events at 8.2 and 4.2 ka. The 8.2 ka global cooling events have been recorded from northern Indian Ocean marine archives but limited records from the continental archives of the Indian landmass has demonstrated the 8.2 ka event. At the same time, the 4.2 ka dry climate has been endorsed by both marine as well as continental records and agrees with the global studies. During the ‘Little Ice Age’ (LIA), in the India subcontinent, wet conditions prevailed in the northern, central and western regions while a dry climate existed over the greater part of peninsular India. The present review offers an account of ISM signatures and possible mechanisms associated with the monsoon variability in the Indian subcontinent and the northern Indian Ocean during the Holocene period.
‘I Failed to Work Hard’: Reasons for Secondary School Dropout among Muslim Men in Delhi
Authors: Salman Aashti
Published: January 2020

This article aims to understand the reasons and experiences which contribute to dropout among Muslims in India at the secondary school level (grades IX–XII). The focus of this article is low-income Muslim men, who have left school at the secondary level, in a predominantly Muslim neighbourhood of Jamia Nagar, Delhi. The context of this article is set by the seminal Sachar Committee Report which highlights the educational disadvantages of Muslims, categorising their school dropout rates as ‘worrisome’. The findings of this article are partially consistent with previous research. In the final instance, the Muslim men in Jamia Nagar linked their school leaving to their personal failure: in terms of their inability to maintain interest in studies/failing to clear a grade. There was a strong value attached to hard work, which men felt they lacked, and this was cited as the reason for their personal failure in school. In the process of constructing this narrative, family experiences were downplayed. School experiences were singled out by men as not affecting their decision to drop out. Another striking finding of this study is the relationship between self-employment and the decision to drop out.
On the utility of dreaming: A general model for how learning in artificial agents can benefit from data hallucination
Authors: Windridge David , Svensson Henrik , Thill Serge
Published: January 2020

We consider the benefits of dream mechanisms – that is, the ability to simulate new experiences based on past ones – in a machine learning context. Specifically, we are interested in learning for artificial agents that act in the world, and operationalize “dreaming” as a mechanism by which such an agent can use its own model of the learning environment to generate new hypotheses and training data.

We first show that it is not necessarily a given that such a data-hallucination process is useful, since it can easily lead to a training set dominated by spurious imagined data until an ill-defined convergence point is reached. We then analyse a notably successful implementation of a machine learning-based dreaming mechanism by Ha and Schmidhuber (Ha, D., & Schmidhuber, J. (2018). World models. arXiv e-prints, arXiv:1803.10122). On that basis, we then develop a general framework by which an agent can generate simulated data to learn from in a manner that is beneficial to the agent. This, we argue, then forms a general method for an operationalized dream-like mechanism.

We finish by demonstrating the general conditions under which such mechanisms can be useful in machine learning, wherein the implicit simulator inference and extrapolation involved in dreaming act without reinforcing inference error even when inference is incomplete.
Clinical and Radiological Outcomes of Hallux Rigidus Treated With Cheilectomy and a Moberg-Akin Osteotomy
Authors: Maes Danielle J. A. , De Vil Jeroen , Kalmar Alain F. , Lootens Tom
Published: January 2020

Background:

This study aimed to evaluate the clinical and radiological outcome after cheilectomy and proximal phalangeal biplanar osteotomy for patients with mild and advanced stages of hallux rigidus.

Methods:

A total of 105 feet (grades 0-4) were treated with cheilectomy and a Moberg-Akin osteotomy of the proximal phalanx. All patients were clinically assessed preoperatively and followed up for 12 months by range of motion, visual analog scale (VAS) pain score, American Orthopaedic Foot & Ankle Society (AOFAS) score, Short Form 36 (SF-36) score, and weightbearing radiographs.

Results:

This operative procedure resulted in a statistically significant positive effect on mobility of the first metatarsophalangeal joint ( P = .001), VAS pain score ( P < .001), AOFAS score ( P < .001), and SF-36 score ( P < .001).

Conclusion:

Cheilectomy and biplanar osteotomy of the proximal phalanx was an effective procedure for hallux rigidus with a positive effect on clinical and radiological outcome.

Level of Evidence:

IV, case series.
Outcomes of NCAA Defensive Football Players Following Achilles Tendon Repair
Authors: Wise Patrick M. , King Jesse L. , Stauch Christopher M. , Walley Kempland C. , Aynardi Michael C. , Gallo Robert A.
Published: January 2020

Background:

The incidence of Achilles ruptures has been on the rise in National Collegiate Athletic Association (NCAA) football players, but the career impact of this injury is not fully understood. In this study, we analyzed a large series of Achilles tendon injuries in NCAA Football Bowl Subdivision (FBS) defensive football players who required repair in order to determine their return to play, performance, and career outcomes afterward.

Methods:

FBS defensive football players who required Achilles repair from 2010 to 2016 were identified. The return to play of the eligible underclassmen athletes was then determined and the preinjury and postoperative performances of players who met criteria were compared with matched controls. The number of underclassmen who went on to participate in the National Football League (NFL) Combine or play in at least 1 NFL game was also determined and compared with controls.

Results:

Fifty-seven total Achilles ruptures were identified, 40 of which occurred in underclassmen, who returned at a rate of 92.5%. Of the players who met performance criteria, only defensive backs differed from matched controls in terms of solo tackling ( P = .025) and total tackling (P = .038), while still increasing compared with preoperative performance. Only 5.0% of underclassmen performed at NFL Combine and only 7.5% competed in at least 1 NFL game (20.0% and 21.3%, respectively, for matched controls).

Conclusion:

Defensive FBS players returned at a high rate following Achilles rupture and did not seem to experience a significant drop-off in performance upon return. An Achilles rupture did appear to impact their chances of playing professionally in the future, however.

Level of Evidence:

Level III, retrospective comparative study.
Vibration model of Ziyuan3 satellites considering frequency changing
Authors: Mo Fan , Xie Junfeng , Liu Yuxuan
Published: January 2020

Ziyuan3-01 and Ziyuan3-02, Chinese civilian high-resolution stereo mapping satellites, were designed to satisfy the requirements of 1:50,000 digital topographical mapping. Platform vibration detection plays an important role in the Ziyuan3 satellite project. Various methods have been used to detect the vibration of Ziyuan3-01, but none focuses on that the vibration frequency is not a fixed value. To detect and model the vibration, this study proposes a method based on a set of raw gyroscope data to detect long-term vibration and model it with considering frequency changing. Two experiments were conducted, and the results showed that (a) the proposed method can detect the long-term vibration frequency and model it; (b) there is a same vibration frequency of approximately 0.65 Hz in the Ziyuan3-01 and Ziyuan3-02; (c) the 0.65 Hz vibration suffered by the Ziyuan3 satellite series is not a fixed value, varying from 0.59 Hz to 0.7 Hz, and the period of the vibration change is a constant value of approximately 1 year, which we modeled with a sine function; and (d) the working state of loads on the platform, such as solar panels, has an influence on the vibration frequency certainly.
Phenomenology of Science and the Art of Radical Questioning
Authors: Dahlberg Helena , Dahlberg Karin
Published: January 2020

For some time, critique has been raised against the application of phenomenological philosophy in empirical research. In this article, we listen to the critical voices with the aim to revisit the connection between phenomenology as philosophy and its empirical practice in research. We claim that it is the question of how philosophy has been, or can be, used in empirical research that is at stake. We thus suggest a fruitful way of benefiting from philosophy in science, namely, as an art of radical questioning. Phenomenology can teach us this art, and we therefore argue for a phenomenology of science.
Monoaminergic Genetic Variants, Prefrontal Cortex–Amygdala Circuit, and Emotional Symptoms in Children With ADHD: Exploration Based on the Gene–Brain–Behavior Relationship
Authors: Liu Lu , Zhao Qihua , Yu Xiaoyan , Xu Defeng , Li Haimei , Ji Ning , Wu Zhaomin , Cheng Jia , Su Yi , Cao Qingjiu , Sun Li , Qian Qiujin , Wang Yufeng
Published: January 2020

Objective: This study aimed to explore the association between monoaminergic genetic variants and emotional lability (EL) symptoms in children with ADHD. In addition, genetic effects on prefrontal cortex (PFC)–amygdala functional connectivity (FC) were investigated. Method: Children with ADHD and controls were genotyped for five monoaminergic genetic variants and were evaluated for EL symptoms. Imaging genetic exploration was conducted with previously reported aberrant PFC–amygdala resting-state functional connectivities (RSFCs) as target features. Results: A genotypic effect on EL symptoms was only found for NET1-rs3785143, indicating higher EL symptoms in TT genotype carriers than in C-allele carriers. Imaging genetic analyses indicated a marginal effect of NET1-rs3785143 on ADHD-altered FC between the superficial amygdala (SFA) and middle frontal gyrus (MFG). Mediation analysis suggested potential effects of NET1-rs3785143 via RSFC (SFA–MFG) on EL. Conclusion: NET1 variants might participate in the pathogenesis of EL in children with ADHD by influencing the function of the PFC–amygdala circuit.
Multimodal imaging in pediatric arterial macroaneurysm: A case report
Authors: Pierro Luisa , Battista Marco , Arrigo Alessandro , Manitto Maria Pia , Bandello Francesco
Published: January 2020

Our aim is to report a case of asymptomatic retinal arterial macroaneurysm in a 9-year-old female patient. She was referred to our Ophthalmology clinic for a routine ophthalmologic examination and, after the detection of a juxtafoveal saccular vascular enlargement in indirect ophthalmoscopy, underwent a multimodal imaging assessment. Optical coherence tomography-angiography and fluorescein angiography were important to determine the nature of the lesion, identified as a congenital retinal arterial macroaneurysm. Retinal vascular abnormalities represent a rare finding in pediatric patients and must be carefully explored to establish the correct diagnosis. A multimodal imaging approach was very useful to thoroughly reach this target. Vascular abnormalities represent a rare finding in pediatric patients and must be carefully explored to establish the correct diagnosis. A multimodal imaging approach is very useful to study in deep the reported arterial macroaneurysm in a non-invasive way.
Optic atrophy in children: Current causes and diagnostic approach
Authors: Jones Rebecca , Al-Hayouti Huda , Oladiwura Dilys , Karim Rushmia , Sawczenko Andrew , Dahlmann-Noor Annegret
Published: January 2020

Background/aims:

Optic atrophy is one of the leading causes of sight impairment in children. It frequently poses a diagnostic challenge, as it can be caused by many ocular and systemic conditions. We aimed to determine the current causes of optic atrophy at our centre and to describe the use of investigations, including molecular genetic testing.

Methods:

We reviewed the medical records of children with optic atrophy seen at Moorfields Eye Hospital between 2010 and 2015. We recorded demographic data, reason for referral, history, investigations and diagnosis.

Results:

We studied 143 cases aged below 16 years. A cause could be identified in all cases. Taking a full history was the most important part of the diagnostic workup, identifying a cause in 96 (67%) children. A developmental disorder of the brain and/or optic nerve, sometimes with retinal involvement, was the commonest cause (n = 33, 23%), followed by inheritable optic neuropathies (n = 27, 19%). Other causes included perinatal insults (n = 18, 13%), post-infectious or post-inflammatory conditions (n = 18, 13%), accidental or abusive trauma (n = 14, 10%) and inheritable retinal dystrophies (n = 13, 9%). Rare conditions included neurodegenerative disorders (n = 7, 5%), skeletal developmental disorders such as rickets (n = 4, 3%), tumours (n = 4, 3%), ischaemic events including large optic nerve head drusen (n = 4, 3%) and toxic events/metabolic conditions (n = 1, 0.7%).

Conclusion:

In this series, an underlying cause could be identified in all cases. Taking a comprehensive antenatal, perinatal, postnatal and family history will indicate a probable diagnosis in two-thirds of children, and targeted ancillary tests may identify the cause in most remaining cases.
Blood transfusion rates and predictors following geriatric hip fracture surgery
Authors: Arshi Armin , Lai Wilson C , Iglesias Brenda C , McPherson Edward J , Zeegen Erik N , Stavrakis Alexandra I , Sassoon Adam A
Published: January 2020

Background:

Postoperative blood product transfusions in elderly hip fracture patients cause concern for morbidity and mortality. The purpose of this study was to identify predictors and short-term sequelae of postoperative transfusion following geriatric hip fracture surgery.

Methods:

We queried the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) to identify geriatric (⩾65 years) patients who sustained operative femoral neck, intertrochanteric, and subtrochanteric hip fractures in 2016. Multivariate regression was used to determine risk-adjusted odds ratios (OR) of associated perioperative risk factors and sequelae of postoperative transfusion.

Results:

In total, 8416 geriatric hip fracture patients were identified of whom 28.3% had documented postoperative transfusion. In multivariate analysis, age (OR 1.03 [1.02–1.04], p < 0.001), preoperative anaemia (OR 4.69 [3.99–5.52], p = 0.001), female sex (OR 1.61 [1.39–1.87], p < 0.001), lower BMI (OR 0.97 [0.96–0.98], p < 0.001), American Society of Anesthesiologists (ASA) classification (OR 1.14 [1.01–1.27], p = 0.031), COPD (OR 1.30 [1.06–1.59], p = 0.011), hypertension (OR 1.17 [1.01–1.35], p = 0.038), increased OR time (OR 1.02 [1.01–1.03], p < 0.001), and intertrochanteric (OR 2.99 [2.57–3.49], p < 0.001) and subtrochanteric femur fractures (OR 5.07 [3.84–6.69], p < 0.001) were independent risk factors for receiving postoperative blood transfusion. Patients with postoperative transfusion had a significantly higher risk-adjusted 30-day mortality (8.4% vs. 6.4%, OR 1.29 [1.02–1.64], p = 0.035), hospital readmission rate (9.4% vs. 7.7%, OR 1.27 [1.04–1.55], p = 0.018), and total hospital LOS (7.3 vs. 6.3 days, p < 0.001).

Conclusions:

Postoperative transfusion is a common occurrence in geriatric fragility hip fractures with multiple risk factors. Careful preoperative planning and multidisciplinary management efforts are warranted to reduce use of postoperative transfusions.