bluuebunny/crossref_metadata_2025 huggingface dataset:
Indymedia legacies in Brazil and Spain: the integration of technopolitical and intersectional media practices
Authors: Aikawa Luiza , Jeppesen Sandra ,   Media Action Research Group
Published: June 2020

The Indymedia network is recognized for its open-editorial platform, as well as its prefigurative combination of technological tactics and organizational strategies. In this article, we discuss the legacy of Indymedia in countries not often focalized in the network or in the scholarly literature, namely Brazil and Spain. These countries were chosen to address gaps in the literature regarding Indymedia-influenced adaptations of horizontal media practices established in peripheral spaces such as Latin America and the so-called ‘Global South of Europe’. This research is based on data sets from two empirical research projects comprised of 37 semi-structured interviews in Spain and Brazil. The interviews were audio-recorded, transcribed, and comparatively analyzed using NVivo. Media activist practices challenge the reductionist binary that situates information and communication technologies (ICTs) as either deterministically revolutionary or intrinsically complicit with capitalism. In this context, using Midia Ninja in Brazil and XNet in Spain as case studies, we argue that Indymedia has had an impact on technological innovations adopted by contemporary intersectional social movement media projects in the global south, critically analyzing ways in which media activist projects have resisted exogenous and endogenous intersectional inequalities through developing specific organizational structures and practices. We find that intersectional practices related to the anti-capitalist technopolitics of Indymedia have both shaped and been shaped by specific dimensions of digital technologies. We argue that in alternative media practices, intersectionality and anti-capitalist technopolitics have emerged together as intertwined legacies of Indymedia.
Interparental Conflict on Italian Adolescent Adjustment: The Role of Insecurity within the Family
Authors: de Silva Aryanne D. , Gao Mengyu M. , Barni Daniela , Donato Silvia , Miller-Graff Laura E. , Cummings E. Mark
Published: June 2020

Despite its importance, limited research has examined mechanisms underpinning how interparental conflict affects adolescents in Europe. Using a sample of 141 Italian families (mothers, fathers, and adolescents, Mage = 17.25 years, SD = 0.64), this study explores whether three types of adolescents’ emotional insecurity, which describes adolescents’ vulnerability to conflict, play a role in the association between interparental conflict and adolescents’ adjustment. Participants completed questionnaires related to adolescents’ conflict exposure, adjustment, and emotional insecurity in the parent-adolescent, interparental, and family relationships. As hypothesized, indirect associations were observed involving adolescents’ emotional insecurity in the parent-adolescent and interparental relationships. Surprisingly, the indirect association involving emotional insecurity within the interparental relationship rather than within the family emerged the strongest indirect association of the three types of emotional insecurity. These effects, however, were indistinguishable from the indirect effects of insecurity about the parent-adolescent relationship. Theoretical and practical implications of these findings are discussed.
The Feasibility of Measuring Sleep and Circadian Characteristics in Adults with Inflammatory Bowel Disease
Authors: Conley Samantha , Proctor Deborah D. , Lehner Vanessa , Jeon Sangchoon , Redeker Nancy S.
Published: June 2020

Interest in sleep and circadian research in inflammatory bowel disease (IBD) (Crohn’s disease and ulcerative colitis) is growing; however, few studies have objectively measured sleep or circadian rhythms in people with these conditions. The purpose was to determine the feasibility of the use of wrist actigraphy, electronic sleep/activity diaries, and participant-collected saliva among adults with both active and inactive IBD. We conducted a 10-day feasibility study of adults aged 18 years to 60 years with IBD. We measured sleep and rest-activity rhythms with wrist actigraphy, self-reported sleep/activity using electronic diaries, and participant-collected saliva to compute salivary dim light melatonin onset. All 37 (100%) participants wore the wrist actigraphs, 91.8% (N = 34) participants completed at least 15 of the 18 electronic diaries, and 34 (91.9%) completed the saliva collection. It is feasible to use wrist actigraphy and electronic sleep/activity diaries in adult participants with inflammatory bowel disease.
Clinical outcomes associated with retrograde arterial perfusion in minimally invasive mitral valve surgery: a systematic review
Authors: Burns Daniel JP , Birla Rashmi , Vohra Hunaid A
Published: June 2020

Introduction:

Given several reports of an increased neurologic risk with retrograde arterial perfusion in minimally invasive mitral valve surgery, we sought to identify and synthesize the best available evidence on the influence of perfusion strategy on post-operative clinical outcomes in this population.

Methods:

A systematic search of PubMed, EMBASE, MEDLINE, and Cochrane library databases was performed to identify publications comparing clinical outcomes associated with antegrade and retrograde arterial perfusion in minimally invasive mitral valve surgery. Pre-specified outcomes of interest were neurologic events, mortality, and renal failure. The search was performed by two independent reviewers, with data abstraction following.

Results:

Seven observational studies were included in this review, with a total patient population of 5,385. Six were retrospective cohort in design, with a single small prospective cohort study identified. When available, adjusted publication-specific risk estimates were abstracted and included preferentially over unadjusted or reviewer-derived risk estimates. Meta-analysis was felt to be heavily flawed in the context of few small studies identified and was not performed. In adjusted estimates, there appeared to be an increased risk of neurologic complications with retrograde arterial perfusion. There was a null pattern apparent between arterial perfusion strategy and each of 30-day mortality and renal failure.

Conclusion:

Retrograde arterial perfusion in minimally invasive mitral valve surgery may be associated with an increased risk of neurologic events, without affecting the risk of 30-day mortality or renal failure. Although these patterns were identified, an overall paucity of evidence justifies further study.
Comparison of efficacy of a supervised versus non-supervised physical therapy exercise program on the pain, functionality and quality of life of patients with non-specific chronic low-back pain: a randomized controlled trial
Authors: Matarán-Peñarrocha Guillermo A , Lara Palomo Inmaculada Carmen , Antequera Soler Eduardo , Gil-Martínez Esther , Fernández-Sánchez Manuel , Aguilar-Ferrándiz María Encarnación , Castro-Sánchez Adelaida María
Published: June 2020

Objective:

To compare the effectiveness of supervised physical therapy program versus non-supervised on pain, functionality, fear of movement and quality of life in patients with non-specific chronic low back pain.

Design:

A randomized double-blind clinical trial.

Setting:

Clinical outpatient unit; home.

Subjects:

A total of 64 participants with non-specific chronic low back pain were randomized into either supervised exercise group ( n = 32) or non-supervised home exercise group ( n = 32).

Interventions:

The supervised group was treated with therapy exercises (strengthen lumbopelvic musculature), while the non-supervised received an informative session of the exercises, which were performed un-supervised at home. Both groups received three weekly sessions for eight weeks.

Main Measures:

Pain, disability, fear of movement, quality of life, trunk muscle endurance and trunk anteflexion motion were assessed at baseline, two, and six months of follow-up.

Results:

Although analysis of variance (ANOVA) test showed statistically significant differences between groups for pain ( P = 0.028; supervised: 2.5 ± 2.1; non-supervised: 3.5 ± 1.5) and disability for Roland–Morris Disability Questionnaire ( P = 0.004; supervised: 3.1 ± 2.2; non-supervised: 5.1 ± 3.0) and for Oswestry Disability Index ( P = 0.034; supervised: 14.5 ± 7.1; non-supervised: 19.2 ± 10.0) at 8 weeks immediately posttreatment, there were no differences between the groups in patient-rated pain, functionality, fear of movement and quality of life at six months of follow-up.

Conclusion:

Patients with chronic low back pain who received supervised exercise showed more improvement in both the short and long term in all patient-rated outcomes over the non-supervised group, but the differences were small and not clinically significant.
A scoping review of interventions using accelerometers to measure physical activity or sedentary behaviour during hospitalization
Authors: Baldwin Claire E , Parry Selina M , Norton Lynda , Williams Jill , Lewis Lucy K
Published: June 2020

Objective:

To identify interventions using wearable accelerometers to measure physical activity and/or sedentary behaviour in adults during hospitalization for an acute medical/surgical condition.

Data sources:

Four databases were searched in August 2019 (MEDLINE, CINAHL, Scopus, EMBASE).

Review methods:

Studies were selected if they described an intervention in adults with a medical/surgical condition, and concurrently reported an accelerometer-derived measure of physical activity and/or sedentary behaviour while participants were admitted. Items were screened for eligibility in duplicate. Included studies were synthesized to describe intervention types, feasibility and potential effectiveness.

Results:

Twenty-two studies were included, reporting on 3357 participants (2040 with accelerometer data). Identified types of interventions were: pre-habilitation ( n = 2) exercise ( n = 3), patient behaviour change with self-monitoring ( n = 6), models of care ( n = 5), implementing system change ( n = 2), surgical technique ( n = 2) patients wearing day clothes ( n = 1) and education about activity in hospital ( n = 1). Of 16 studies that reported intervention effects on physical activity, 11 reported a favourable impact including studies of: pre-habilitation, self-monitoring (accelerometry or an activity whiteboard), physiotherapy, an early mobility bundle, minimally invasive surgery, an education booklet and by implementing system change. Of the six studies that reported intervention effects on sedentary behaviour, there was a favourable impact with an activity whiteboard, models of care and an education booklet.

Conclusion:

Accelerometer-derived measures of physical activity and/or sedentary behaviour have been used to describe sample characteristics and intervention effects in studies of hospitalized adults. Interventions may involve a range of health professionals, but less is known about sedentary behaviour in this setting.
Disentangling the effects of cannabis and cigarette smoking on impulsivity
Authors: Round Jason T , Fozard Therese E , Harrison Amanda A , Kolokotroni Katerina Z
Published: June 2020

Background:

Cannabis smoking and cigarette smoking often co-occur, yet limited research has investigated the potentially different role impulsivity may play when these behaviours occur in isolation, compared with in combination.

Aims:

This study examined trait and behavioural impulsivity as a function of both cigarette and cannabis smoking.

Methods:

Trait impulsivity (BIS-11) was compared between 44 non-smokers, 76 cigarette only, 47 cannabis only and 58 cannabis plus cigarette smokers. The effects of cigarette and cannabis smoking on behavioural impulsivity (stop-signal and information sampling tasks) were then assessed in 87 of these participants during a laboratory session.

Results:

Trait impulsivity was significantly higher in cigarette smokers than non-smokers, irrespective of cannabis use, except for motor impulsivity, where cigarette smoking was only associated with elevated trait impulsivity in non-smokers of cannabis. Dimensions of trait impulsivity were significantly positively related to cigarette smoking frequency and nicotine dependence, but not to cannabis smoking frequency or dependence. Smoking cigarettes or cannabis was associated with significantly impaired reflection impulsivity relative to not smoking either substance. However, no additional increases in reflection impulsivity were observed in those who smoked both cigarettes and cannabis. No group differences in response inhibition were detected.

Conclusions:

Heightened trait impulsivity appears to be uniquely related to cigarette smoking, whilst the smoking of cigarettes or cannabis is associated with impairments in reflection impulsivity. Improved outcomes for treating cannabis dependence may result from encouraging concomitant cigarette smokers to cease using both drugs simultaneously in order to reduce heightened impulsivity and risk of relapse.
Dynamic locomotion for passive-ankle biped robots and humanoids using whole-body locomotion control
Authors: Kim Donghyun , Jorgensen Steven Jens , Lee Jaemin , Ahn Junhyeok , Luo Jianwen , Sentis Luis
Published: June 2020

Whole-body control (WBC) is a generic task-oriented control method for feedback control of loco-manipulation behaviors in humanoid robots. The combination of WBC and model-based walking controllers has been widely utilized in various humanoid robots. However, to date, the WBC method has not been employed for unsupported passive-ankle dynamic locomotion. As such, in this article, we devise a new WBC, dubbed the whole-body locomotion controller (WBLC), that can achieve experimental dynamic walking on unsupported passive-ankle biped robots. A key aspect of WBLC is the relaxation of contact constraints such that the control commands produce reduced jerk when switching foot contacts. To achieve robust dynamic locomotion, we conduct an in-depth analysis of uncertainty for our dynamic walking algorithm called the time-to-velocity-reversal (TVR) planner. The uncertainty study is fundamental as it allows us to improve the control algorithms and mechanical structure of our robot to fulfill the tolerated uncertainty. In addition, we conduct extensive experimentation for: (1) unsupported dynamic balancing (i.e., in-place stepping) with a six-degree-of-freedom biped, Mercury; (2) unsupported directional walking with Mercury; (3) walking over an irregular and slippery terrain with Mercury; and 4) in-place walking with our newly designed ten-DoF viscoelastic liquid-cooled biped, DRACO. Overall, the main contributions of this work are on: (a) achieving various modalities of unsupported dynamic locomotion of passive-ankle bipeds using a WBLC controller and a TVR planner; (b) conducting an uncertainty analysis to improve the mechanical structure and the controllers of Mercury; and (c) devising a whole-body control strategy that reduces movement jerk during walking.
Temporary percutaneous radiologic gastrojejunostomy with single gastropexy
Authors: Park Jung-Hoon , Cho Young Chul , Shin Ji Hoon , Nouri Yasir , Kim Jong Woo , Kim Jin-Hyoung , Ko Heung-Kyu
Published: June 2020

Background

Although the effectiveness of percutaneous radiologic gastrojejunostomy (PRGJ) has been reported, a detailed description of the indications and clinical effectiveness of temporary PRGJ is still limited.

Purpose

To evaluate the clinical effectiveness and technical feasibility of temporary PRGJ using the modified Chiba-needle technique with single gastropexy.

Material and Methods

Temporary PRGJ using the modified Chiba-needle technique with single gastropexy was performed in 27 consecutive patients (19 men, 8 women; mean age = 61 years; age range = 32–77 years) for esophageal perforation (n = 18) or postoperative gastroparesis (n = 9). Outcomes analyzed included the technical and clinical success, procedure-related complications, and the tube indwelling period.

Results

Technical and clinical success was achieved in all 27 patients. All the tubes were electively removed 19–364 days (mean indwelling period = 104 days) after confirmation of the possibility of oral intake. Asymptomatic pneumoperitoneum occurred in 2/27 (7.4%) patients as minor complications and was resolved spontaneously by the time of the one-week follow-up. There were no major complications. During the follow-up period, a total of 11 tube changes were performed in seven patients for an elective tube change within a six-month interval (n = 5) or because of tube occlusion (n = 6).

Conclusion

Temporary PRGJ using the modified Chiba-needle technique with a single gastropexy was clinically effective and technically feasible in patients with esophageal perforation or gastroparesis. It can provide adequate enteral nutrition during its temporary placement.
Intra-articular Injection of Pure Platelet-Rich Plasma Is the Most Effective Treatment for Joint Pain by Modulating Synovial Inflammation and Calcitonin Gene-Related Peptide Expression in a Rat Arthritis Model
Authors: Araya Naoko , Miyatake Kazumasa , Tsuji Kunikazu , Katagiri Hiroki , Nakagawa Yusuke , Hoshino Takashi , Onuma Hiroaki , An Saisei , Nishio Hirofumi , Saita Yoshitomo , Sekiya Ichiro , Koga Hideyuki
Published: June 2020

Background:

Platelet-rich plasma (PRP) has emerged as a treatment for osteoarthritis (OA). However, the effect that leukocyte concentrations in PRP have on OA remains unclear.

Purpose:

To clarify the optimal PRP formulation for OA treatment by comparing pure PRP, leukocyte-poor PRP (LP-PRP), and leukocyte-rich PRP (LR-PRP) in a rat arthritis model.

Study Design:

Controlled laboratory study.

Methods:

Knee arthritis was induced bilaterally in male Wistar rats with intra-articular injections of monosodium iodoacetate (MIA) on day 0. Rats were randomly assigned to 1 of 3 treatment groups (pure PRP, LP-PRP, and LR-PRP). On day 1, allogenic PRP was injected into the right knee of rats and phosphate-buffered saline was injected into the left knee as a control. Weight distribution on the hindlimbs was measured for 14 days to assess pain behavior. Rats were euthanized at day 5 or 14 for histological assessment of synovial tissue and cartilage. Immunohistochemical staining of calcitonin gene-related peptide (CGRP) and α-smooth muscle actin was performed to determine the mechanism of pain relief induced by the PRP preparations.

Results:

In all groups, PRP increased the load-sharing ratio on PRP-injected knees, with pure PRP eliciting the largest effect among the 3 kinds of PRP ( P < .05). Structural changes in the synovial tissue were significantly inhibited in the pure-PRP group compared with the control group after both 5 and 14 days ( P < .001 and P = .025, respectively), whereas no significant difference was found between the control, LP-PRP, and LR-PRP groups. An inhibitory effect on cartilage degeneration was observed only in the pure-PRP group on day 14. Pure PRP also significantly inhibited expression of CGRP-positive nerve fibers in the infrapatellar fat pad compared with the other groups ( P < .05).

Conclusion:

In an MIA-induced arthritis model, pure PRP injection was the most effective treatment for reduction of pain-related behavior and inhibition of synovial inflammation and pain sensitization.

Clinical Relevance:

PRP formulations should be optimized for each specific disease. This study shows the superiority of pure PRP for treatment of arthritis and joint pain.
Testing awareness of fertility and reproductive health among unmarried medical students at Cairo University
Authors: GamalEl Din Sameh Fayek , Saleh Wael Fayek
Published: June 2020

Aim:

We aimed in this survey to assess fertility and reproductive health awareness among medical students.

Methods:

A total of 354 female and male final year medical students (193 females and 157 males) were recruited for this survey at the Kasr Al-Ainy Faculty of Medicine, who attended the lectures of the andrology and sexually transmitted disease department.

Results:

Our study demonstrated that the mean ages of the female and male medical students when they want to have their first child were 26.95 ± 2.924 and 28.7 ± 3.94, respectively, and and p = 0, while the mean ages of the female and male medical students when they want to have their last child were 32.5 ± 3.2 and 34.7 ± 5.1, respectively, and p = 0.001. Our study demonstrates that a majority of the female and male medical students moderately estimated the efficacy of the assisted reproductive technique to take a baby home, and the means of their estimation were 42.620% ± 12% and 43.5% ± 13.1% and p = 0.482. Moreover, our study showed that 75 (39.1%) females were convinced that vaginal delivery has a potential negative effect on the sexual functions. However, 99 (51.6%) females did not see any potential negative effect of vaginal delivery. In addition, 18 (9.4%) females responded in an indefinite way to this question. Finally, our study demonstrated that 145 (92.4%) males rejected the proposal of vasectomy.

Conclusions:

Interestingly, our study revealed increased estimation by the participants of the efficacy of the assisted reproductive technique to take a baby home, despite the fact that they were medical students who had already studied the subject of gynecology in their fifth year and should have estimated it properly.
A ChatBot for Learning Chinese: Learning Achievement and Technology Acceptance
Authors: Chen Hsiu-Ling , Vicki Widarso Gracia , Sutrisno Hendri
Published: June 2020

ChatBot has potential as a language learning tool, especially for learning Chinese vocabulary. This study aimed to investigate the impact of using a newly developed ChatBot to learn Chinese vocabulary by comparing how it works in different learning environments and to explore the ChatBot with reference to the Technology Acceptance Model (TAM). This study was conducted with 58 students divided into two independent groups. The control group used ChatBot in a one-on-many classroom. The experimental group applied the ChatBot in one-on-one tutor sessions. A pretest and a posttest were used to measure the effect of the ChatBot, while TAM was explored through questionnaire and interview. Data analysis includes a paired-sample t test, analysis of covariance, and levels of effect. The results indicated that the ChatBot significantly improved the students’ learning achievement and that having a one-on-one environment may lead to better outcome than what could be achieved in a classroom. The TAM model was tested using partial least square. The result showed that perceived usefulness was the predictor of behavioral intention, whereas perceived ease of use was not. The students agreed that the ChatBot benefited their learning of Chinese vocabulary, with several adjustments need to be made for further progress.
Childhood Significant Experiences that Contribute to Christian Commitment in Young Adulthood
Authors: Davis Stacey J.
Published: June 2020

Childhood experiences are significant to adult spirituality. Understanding these influential experiences can assist professors of Christian education as they seek to empower future children’s ministry workers. This article seeks to understand how childhood experiences influence adult spirituality. In-depth interviews and grounded theory were utilized on 21 participants between 22 and 30 years old. Results from this study created seven themes revealing the childhood experiences that contribute to Christian commitment in young adulthood.
Midwives Uniquely Suited to Deliver Woman-Centered Care and Decrease Stigma for Women With Substance Use Disorders
Authors: Shogren Maridee D.
Published: June 2020

Midwives are being called to serve a growing population of vulnerable women, those with substance use disorders (SUDs). Increasing numbers of women across the lifespan are being diagnosed with SUDs. In addition, women with SUDs are experiencing very unique and distinct differences in stigma related to their substance use. This stigma is coming from varied sources and through many different forms including mislabeling, misinformation, the media, and a devalued maternal/child relationship. Mothers frequently experience different types of adverse health encounters during the perinatal and postpartum period that also contribute to stigma. Midwives are positioned to provide woman-centered care in a variety of practice settings as integral members of interprofessional teams. Midwives can decrease the stigma women with SUDs are experiencing while improving the health of women, mothers, and families worldwide.
The Clinical Utility of Inpatient Brain Magnetic Resonance Imaging in Children
Authors: Tokatly Latzer Itay , Orbach Rotem , Ben-Sira Liat , Mezad-Koursh Daphna , Bachar Zipori Anat , Roth Jonathan , Constantini Shlomi , Fattal-Valevski Aviva , Lubetzky Ronit
Published: June 2020

The clinical applicability and yield of brain magnetic resonance imaging (MRI) in the setting of an inpatient pediatric department has not been investigated. The authors performed a retrospective chart review of nontraumatic/nonneurosurgical children who underwent brain MRI during their hospitalization in a general pediatric department over a 5-year period. Of the 331 children who underwent brain MRI, 148 (45%) had abnormal findings. High-risk headaches and focal seizures were significantly correlated with findings on brain MRI. Diagnostic and therapeutic yields were most significant in acute demyelinating events, acute cerebrovascular disorders, high-risk headaches when supported by neurologic and ophthalmologic findings, focal seizures with evidence of multifocal epileptic activity on an electroencephalogram and ophthalmic complaints when accompanied by cranial nerve palsy and optic nerve impairment. Since the contributions of a brain MRI in hospitalized children is pivotal in specific clinical situations, a judicious decision-making process should be done before its scheduling, in order to optimize clinical care.
Utilization of an ICU Severity of Illness Scoring System to Triage Patients With ST-Elevation Myocardial Infarction
Authors: Norton Jonathan M. , Reddy Prathibha K. , Subedi Keshab , Fabrizio Carly A. , Wimmer Neil J. , Urrutia Luis E.
Published: June 2020

Objective:

To subjectively identify low-risk ST-elevation myocardial infarction (STEMI) patients and triage this low-risk population to an intermediate level of care.

Background:

Many patients with STEMI are admitted to the intensive care unit (ICU), however, a large portion do not merit ICU admission. We sought to examine whether, among post-STEMI patients admitted to the ICU, if an easily obtainable subjective scoring system could predict low-risk patients and safely triage them to an intermediate level of care.

Methods:

Retrospective observational study at Christiana Hospital, a 900-bed regional referral center. Data were defined by the ACTION Registry and CathPCI Registry. Acute Physiology and Chronic Health Evaluation (APACHE) predictions were retrieved for all patients with STEMI and were analyzed for complications, length of stay, and inhospital mortality. We then examined subjective criteria to triage patients with STEMI out of the ICU.

Results:

Among 253 patients with STEMI, 179 (70.75%) were classified as low risk (intermediate level care appropriate) and 74 (29.25%) were classified as high risk (ICU appropriate). The mean age was 64.95 years. The APACHE III score was right skewed with a mean of 36.97 and a median of 31. There was a significant difference between the APACHE III score of low-risk patients and the APACHE III score of high-risk patients (P < .001).

Conclusion:

In conclusion, patients characterized as low risk, as defined by our criteria, had low APACHE III scores and a low likelihood of complications post-STEMI. This low-risk population could potentially be admitted to an intermediate level of care, avoiding the ICU altogether.
A Multicountry Study of the Violence-Related Risk Factors for Early Sexual Debut and Risky Sexual Behavior in Adolescents
Authors: Smith Lee , Jacob Louis , López-Sánchez Guillermo F. , Grabovac Igor , Yang Lin , Pizzol Damiano , Sigman Aric , McDermott Daragh , Koyanagi Ai
Published: June 2020

Globally, the prevalence of adolescent sexual intercourse and violence is high. However, to date, no study has investigated the association between violence and sexual behavior in a large representative sample of adolescents, while multicountry studies are also lacking. The objective was thus to examine the relationship between being physically attacked and physical fighting with sexual intercourse, multiple sexual partners, and non-condom use among adolescents aged 12 to 15 years from 43 low- and middle-income countries. Cross-sectional data from 127,513 adolescents participating in the Global School-based Student Health Survey 2003–2016 were analyzed. Data on being physically attacked and physical fighting were assessed through self-report. Data on sexual behavior were collected as follows: (a) ever having had intercourse; among those who reported having had intercourse, (b) multiple (≥2) lifetime sexual partners, and (c) condom use in last sexual intercourse. Data were analyzed using multivariable logistic regression analysis with violence as the exposure and sexual behavior as the outcome, with odds ratios being estimated. Physical attack was dose-dependently and significantly associated with all three sexual behavior outcomes with it being associated with 1.42 (95% confidence interval [CI] = [1.16, 1.74]), 2.13 (95% CI = [1.39, 3.27]), and 1.48 (95% CI = [1.10, 2.00]) times higher odds for sexual intercourse, condom non-use, and multiple sex partners, respectively, when the highest category was compared with the lowest (i.e., ≥4 times vs. 0 times). As for physical fights, compared with not being in a fight in the past 12 months, being in a fight ≥4 times was associated with 2.34 (95% CI = [2.03, 2.70]) and 1.98 (95% CI = [1.56, 2.52]) times higher odds for sexual intercourse and multiple sex partners, respectively. In conclusion, in a large global sample of adolescents, physical attack and physical fight were associated with greater risk of engaging in sexual behavior. Multidimensional government programs and policies addressing violence in young adolescents may lead to reduction in early sexual debut and other risky sexual behavior.
Influence of gear surface roughness on the pitting and micropitting life
Authors: Bergstedt Edwin , Lin Jiachun , Olofsson Ulf
Published: June 2020

Pitting and micropitting are the two main gear rolling contact fatigue modes. It is widely accepted that micropitting will lead to pitting; however, the relationship between pitting and micropitting life needs further investigation. In this work, micropitting and pitting tests were performed on an FZG back-to-back test rig using standard FZG PT-C and GF-C gears. The gear tooth profile change due to micropitting and pitting damage was measured in situ in the gearbox using a profilometer after each test. The gear surface roughness parameters were calculated from the measured tooth profile. A Gaussian low pass filter with cut off length [Formula: see text] mm was applied to the measured tooth profile to obtain the waviness. The calculated roughness parameters and the obtained tooth profile with waviness for each test were imported into the KISSsoft software to calculate the contact stress and specific film thickness at the corresponding load stage. Experimental results show that smooth gear surface can reduce or even avoid micropitting damage, but could lead to a reduction in pitting life.
A dynamic contact wear model of ball bearings without or with distributed defects
Authors: Zhang Xi , Xu Hua , Chang Wei , Xi Hui , Pei Shiyuan , Meng Wei , Li Huawei , Xu Sining
Published: June 2020

A dynamic contact wear model of ball bearings consisting of wear degree and position distribution is proposed by integrating the developed contact wear model, multi-body dynamics and raceway waviness or ball diameter differences. Subsequently, the dynamic wear characteristics, not only for the ideal bearing under different axial and radial loads, but also for the bearing with above defects are analysed. The influences of load, typical waviness orders and amplitude on the wear of each ball against both raceways are evaluated and qualitatively validated. Finally, the dynamic characteristics of ball bearings with one ball larger are discussed, and then vibration frequency and wear rates distinction are verified by the experiment with working-surface roughness measurement as a way for wear rate assessment.
Thermal exploration of radial porous fin fully wetted with SWCNTs and MWCNTs along with temperature-dependent internal heat generation
Authors: Sowmya G , Gireesha BJ , Sindhu S
Published: June 2020

The numerical examination of radiation and natural convection in a porous radial fin along with varying internal heat generation with respect to temperature is carried out in the current study. The aim of this study is to scrutinize the heat transfer phenomenon in fin wetted with water-based carbon nanotubes like single-walled carbon nanotubes and multiwalled carbon nanotubes. In the proposed work, the Darcy’s model is employed for the analysis. The modeled equations are nondimensionalized and solved by utilizing Runge–Kutta–Fehlberg method. The impact of relevant parameters on the heat transfer rate is comprehensively explored with an aid of graphs. Here, multiwalled carbon nanotube–water shows better heat transfer from surface of fin compared to single-walled carbon nanotube–water.
Photoprotective habits in children with systemic lupus erythematosus
Authors: Janthongsri Tipusa , Wisuthsarewong Wanee , Nitiyarom Rattanavalai
Published: June 2020

Background

Systemic lupus erythematosus (SLE) is a complex autoimmune disease that can involve multiple organ systems. Exposure to ultraviolet radiation (UVR) can exacerbate pre-existing SLE, and can even induce systemic manifestations. This study aimed to investigate the photoprotective habits of children with SLE and the factors that significantly influence those photoprotective habits.

Methods

This questionnaire-based cross-sectional study included paediatric SLE patients being treated at the Department of Paediatrics at Siriraj Hospital, Mahidol University, between September 2018 and September 2019. Data were obtained from medical records and a face-to-face interview.

Results

Ninety-six patients were enrolled, with a female-to-male ratio of 8:1. The mean age of patients at enrollment was 13.7 ± 2.4 years. Of the 96 patients, 70 (72.9%) reported being directly exposed to sunlight for less than two hours per day, but 39% of patients spent time in the sun during the peak hours of UVR. Up to 95% of patients used sunscreen. However, only 64% of patients applied it every day, and only 35% of patients used an adequate amount of sunscreen. Girls were significantly more likely to apply sunscreen every day than boys were ( p = 0.041). SLE patients with a shorter disease duration had significantly greater exposure to sunlight than patients with a disease duration of more than four years ( p = 0.040).

Conclusion

Sunscreen was the most common photoprotective method. However, most patients used sunscreen inappropriately. A shorter disease duration was significantly associated with more sunlight exposure. Regular evaluation and emphasis of the importance of photoprotection should be encouraged among paediatric SLE.
Aortitis in the setting of catastrophic antiphospholipid syndrome in a patient with systemic lupus erythematosus
Authors: González-García Andrés , López-Rodríguez Mónica , Redondo Sandra , Patier José Luis , Masso Pilar , Tenorio María , Fajardo Grisel Starita , Sarhane Yasmina , Lacalzada Miguel Martínez , Manzano Luis
Published: June 2020

Catastrophic antiphospholipid syndrome (CAPS) is a rare condition characterized by multiple thromboses affecting mainly small vessels in a short period of time in patients with antiphospholipid antibodies. A high suspicion index is mandatory in order to initiate rapidly aggressive immunomodulatory therapy to avoid a very poor prognosis. Systemic lupus erythematosus (SLE) is often associated with antiphospholipid syndrome, with a worse outcome when the catastrophic features occur. We report the case of a 64-year-old woman with a clinical debut of SLE who presented concomitantly with CAPS with several thrombosis affecting the kidney, spleen and bilateral limbs with blue toe syndrome in both legs. Furthermore, she presented with aortitis, with a malaise and myalgias and general syndrome (asthenia, hyporexia and mild weight loss). Fortunately, she had a good response to multi-target combination therapy (anticoagulants, corticosteroids, hydroxychloroquine, intravenous immunoglobulins, plasma exchange and rituximab). Here, we discuss the association between aortitis and CAPS secondary to SLE, and review the literature regarding similar conditions.
Visible-near infrared spectroscopy for detection of blood in sheep faeces
Authors: Kho Elise A , Fernandes Jill N , Kotze Andrew C , Fox Glen P , Lord Maggy , Beasley Anne M , Moore Stephen S , James Peter J
Published: June 2020

Heavy infestations of the blood-sucking gastrointestinal nematodes, Haemonchus contortus can cause severe anaemia in sheep and leakage of blood into the faeces, leading to morbidity and mortality. Early and accurate diagnosis of infections is critical for timely treatment of sheep, minimizing production and sheep welfare impacts. In pursuit of a quick and easy measure of H. contortus infections, we investigated the use of portable visible near infrared spectrometers for detecting the presence of haemoglobin in sheep faeces as an indicator of H. contortus infection. Calibration models built within the 400–600 nm region by partial least square regression resulted in acceptable prediction accuracies (r 2 p > 0.70 and root mean squared error of prediction <2.64 µg Hb mg−1 faeces) for haemoglobin quantification using two spectrometers. The prediction results from support vector machine regression further improved the prediction of haemoglobin in moist sheep faeces (r 2 p > 0.87 and root mean squared error of prediction <2.00 µg haemoglobin mg−1 faeces). Based on a threshold for anthelmintic treatment of 3 µg Hb mg−1 faeces, both the partial least square and support vector machine models showed high sensitivity (89%) and high specificity (>77%). The specificity of the prediction model for detecting haemoglobin in sheep faeces may be improved by adding more variations in faecal composition into the calibration model. Our success in detecting haemoglobin in sheep faeces, following minimal sample preparation, suggests that with further development, vis–near infrared spectroscopy can provide a sensitive and convenient method for on-farm diagnosis of H. contortus infections.
Prevalence and Clinical Case Series of Syndromic and Nonsyndromic Cleft Lip and Palate in a Saudi Arabian Neonatal Population
Authors: Alyami Bandar , Ali-Hassan Mutaz , Braimah Ramat , Al-Mahri Mansur , Alyami Fahad , Alharieth Saeed
Published: June 2020

Objective:

To report clinical case series of cleft lip with or without palate (CL/P) and to estimate the prevalence of infants with CL/P who were syndromic or nonsyndromic.

Design:

This is a clinical case series study of CL/P among live births in the maternity hospital.

Setting:

The study was carried out in Maternity and Children Hospital, Najran between January 2013 and December 2016.

Materials and Methods:

Sex and clinical presentation of CL/P were collected from the medical records of live births. Clinical presentations were identified by type of CL/P and stratified according to laterality of occurrence. The data were analyzed using (SPSS) program, version 20. Results were presented in simple descriptive statistics.

Main Outcome:

Prevalence of CL/P in the Najran region of Saudi Arabia was 0.65 per 1000 live births (95% CI: 0.650 [0.389-1.092]). Cleft lip and palate was the commonest clinical presentation.

Result:

Of 24 367 live birth, 16 were classified as having CL/P. The overall frequency of CL/P was 0.65/1000 live births (95% CI: 0.650 [0.389-1.092]). There were 10 males and 5 females. Infant sex cannot be established in 1 case. Two (12.5%) patients had cleft lip, 4 (25%) had isolated cleft palate, and 10 (62.5%) had combined CL/P. Nine (56.25%) neonates were cases of nonsyndromic CL/P, while 7 (43.75%) were cases of syndromic CL/P.

Conclusions:

Prevalence rate of 0.65 per 1000 live births over 4-year period was observed at (95% CI: 0.650 [0.389-1.092]). Cleft lip with or without palate was the commonest clinical presentation.
An efficient technique for extraction of nonlinear dynamic features in a model-based feature extraction scheme for machine learning–based structural health monitoring
Authors: Fathalizadeh Najib Mehdi , Salehzadeh Nobari Ali
Published: June 2020

Super-harmonic components in response to the harmonic excitation are sensitive indicators of damages such as breathing cracks in beams or kissing bonds in adhesive joints. In a model-based damage identification process using pattern recognition, these damage indicators can be extracted from the finite element model for all probable damage cases using stepped-sine simulation that necessitates nonlinear transient dynamic analysis with high computational costs. In this study, a procedure based on nonlinear autoregressive with exogenous input model is introduced as an alternative shortcut method for extraction of the damage indicators. As a case study, the finite element model of a beam connected to a rigid support via a flexible adhesive layer was used to investigate the efficiency of the proposed method. Kissing bond was introduced to the model as the source of nonlinearity via contact elements. The results prove that the super-harmonic components of orders up to 3, extracted from the nonlinear autoregressive with exogenous input model, agreed well with those extracted directly from the finite element model, whereas the computational time is reduced by a factor of 1/5. Consequently, the proposed method is very advantageous in the stage of damage pattern database creation in a real-world model-based damage identification process based on pattern recognition.
Nelarabine-associated myelopathy in a patient with acute lymphoblastic leukaemia: Case report
Authors: Amer-Salas Neus , González-Morcillo Gonzalo , Rodríguez-Camacho Juan Manuel , Cladera-Serra Antonia
Published: June 2020

Introduction

Nelarabine is a purine analogue approved for the treatment of patients with T-cell lymphoblastic lymphoma and T-cell acute lymphoblastic leukaemia (T-ALL) that have relapsed or are refractory to two previous chemotherapy regimens. Adverse reactions to nelarabine include neurological toxicity, the pathophysiological mechanisms of which are unknown, although the administration of intrathecal therapy at therapeutic doses given concomitantly with high-dose systemic chemotherapy that crosses the blood–brain barrier may potentiate neurotoxicity.

Case report

We report a case of a 29-year-old woman with a diagnosis of relapsed T-ALL who developed severe myelopathy and polyneuropathy of toxic origin that led to paraplegia, upper-limb paresis, and dysautonomia after the first cycle of nelarabine.

Management and outcome

Rehabilitation and pharmacological treatments were initiated early, but no evidence of a significant clinical change was obtained.

Discussion

Neurotoxicity is a dose-dependent side effect of nelarabine. It is therefore important to consider previously administered neurotoxic drugs before using nelarabine and to monitor patients closely so as to be able to act promptly in case of toxicity. In accordance with the data obtained and based on the Naranjo algorithm, the adverse reaction could be considered possible.
Bluish-gray fingernail discoloration due to the use of nivolumab
Authors: Ocampo Miguel Michel , Lerner Jaren , Dasanu Constantin A
Published: June 2020

Introduction

Immune checkpoint inhibitors have improved clinical outcomes in a wide range of cancers. While skin toxicity is not uncommon with immune checkpoint inhibitors, generalized nail discoloration has not been reported with their use in oncology.

Case report

Herein, we report a unique case of bluish-gray fingernail discoloration due to nivolumab therapy for relapsed melanoma. Management and outcome: This condition reversed completely 10 weeks after nivolumab discontinuation. Naranjo nomogram assessment renders the causality relationship between nivolumab and nail discoloration probable.

Discussion

To our knowledge, this is the first case report of an unusual bluish-gray nail discoloration due to therapy with nivolumab. The mechanism by which nivolumab causes this side effect remains to be elucidated.
Semi-analytical solution by Cartesian harmonic polynomials for a problem of deformation of a long, current-carrying elastic cylindrical conductor
Authors: El Sheshtawy SM , Obada A-SF , Abou-Dina MS , Ghaleb AF
Published: June 2020

Harmonic Cartesian polynomial and rational functions are shown to provide a simple way of obtaining a semi-analytical solution to the uncoupled, two-dimensional problem of thermomagnetoelasticity for a long, transversely isotropic, elastic cylinder carrying an axial, steady electric current. The proposed method involves the solution of a difficult inhomogeneous biharmonic equation for the stress function, and may be invariably used for general geometries of the normal cross-section of the cylinder, for various thermal and mechanical boundary conditions, and also to solve the problem of a long non-conducting cylinder in a transverse magnetic field. At all stages of the solution, there is no need to smoothen the cross-sectional contour in the presence of singular points, as for other methods. Results are provided for the elliptic and rectangular normal cross-sections under the Dirichlet thermal condition and prescribed uniform normal boundary displacement. Quantities of practical interest are represented graphically and discussed. The results may be of interest in determining the deformations occurring in current-carrying metallic parts of structures and machines, and in the central regions of busbars in electric power plants.
Supplier Engagement in Sustainability Programs: A Field Experiment of Enabling Versus Coercive Formalization
Authors: Wohlgezogen Franz , Hofstetter Joerg S. , Brück Frank , Hamann Ralph
Published: June 2020

Formal, compliance-focused governance for supply chain sustainability initiatives has a mixed empirical track record. We build on classic research on bureaucracy to examine how “enabling” and “coercive” formalization at the buyer–supplier interface affect attitudes, an important precursor to behavioral engagement. We conduct a randomized field experiment with the supplier community of a South African insurance company to directly compare treatment effects of enabling and coercive interventions. We report and discuss the enabling intervention’s positive attitudinal effects and the moderation of these effects by supplier characteristics. Our findings also reveal some notable null effects, especially from the coercive intervention. We believe this work contributes to a more nuanced understanding of formal governance choices in supply chains and their impact on supplier engagement.