bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influences on contraceptive method choice among adolescent women across urban centers in Nigeria: a qualitative study
Authors: Sanchez Elynn Kann , McGuire Courtney , Calhoun Lisa M. , Hainsworth Gwyn , Speizer Ilene S. 
Published: February 2021

Abstract
Background
Despite calls to increase contraceptive use among adolescents and youth, large gaps still exist, creating an unmet need for family planning. Past research has focused on barriers to seeking a method. There is less understanding of the types of methods young women want and who and what influences these decisions. This study examines what method characteristics young Nigerian women prioritize when choosing a method to inform future family planning programming.

Methods
In 2018, eight focus group discussions (FGD) were conducted in the Nigerian cities of Ilorin and Jos with 83 young women ages 15–24. Participants were identified by community contacts and separated into groups by religion and marital status. The discussion guide utilized a vignette structure to understand the participants’ perceptions on contraceptive behavior and attitudes and misconceptions surrounding different types of methods. The FGDs were undertaken and analyzed by collaborative teams from the University of Ibadan and the University of North Carolina-Chapel Hill. A thematic analysis of the transcripts was performed using Atlas.ti, including two rounds of coding, and multiple reviews by the research team.

Results
The method characteristics associated with young women’s contraceptive decisions include: side effects, reliability, length of coverage, privacy, cost, and accessibility. Side effects, reliability, and privacy were described as negatively linked to short-acting methods whereas easy accessibility and low cost were positive characteristics of these methods. Long-acting methods were generally viewed as positive. Participants’ focus on side effects commonly resulted from concerns about the impact on future fertility. The characteristics prioritized by individuals change throughout their adolescence and as their marital status changes. Providers, peers, parents, and partners were all found to have an influence over method choice in different ways. The role of these influencers also changes over the adolescent years.

Conclusion
This study demonstrates that programs should prioritize expanding method choice to increase the number of available options to ensure all young women can access a method that fits their desired method characteristics. Programming should ensure that medically accurate information is widely distributed to harness providers, peers, parents and partners as a resource for information about specific methods.
Is the awakening produced by benzodiazepines due to excitatory actions of GABA?
Authors: Ben-Ari Yehezkel 
Published: February 2021

AbstractBenzodiazepines (BZDs) such as Zolpidem can produce a temporary revival of patients who have been akinetic and apathic for years. The mechanisms underlying this “awakening” reaction are suggested globally to be related to an activation of gamma-aminobutyric acid (GABA) inhibitory systems. However, brain trauma or cerebro-vascular infarcts, like many other pathological insults, are associated with a shift of the polarity of GABA from inhibition to excitation consequently to an increase of intracellular chloride concentration ([Cl−]i) levels. Experimental and clinical observations suggest that BZDs generate paradoxical reactions in these conditions, hence the transient “awakening”. The NKCC1 (Na-K-2Cl co-transporter isoform 1) chloride importer antagonist Bumetanide restores low [Cl−]i levels and an efficient inhibitory drive. It is therefore suggested that the administration of Bumetanide might provide a persistent “awakening” by shifting GABAergic actions from excitation to inhibition and attenuating the mechanism underlying the apathic/akinetic state.
Avoiding being stung or bitten – prey capture behaviors of the ant-eating Texas horned lizard (Phrynosoma cornutum)
Authors: Fertschai Ismene , Sherbrooke Wade C. , Ott Matthias , Chagnaud Boris P. 
Published: February 2021

ABSTRACT
Horned lizards (Phrynosoma) are specialized predators, including many species that primarily feed on seed harvester ants (Pogonomyrmex). Harvester ants have strong mandibles to husk seeds or defensively bite, and a venomous sting. Texas horned lizards possess a blood plasma factor that neutralizes harvester ant venom and produce copious mucus in the pharynx and esophagus, thus embedding and incapacitating swallowed ants. We used high-speed video recordings to investigate complexities of their lingual prey capture and handling behavior. Lizards primarily strike ants at their mesosoma (thorax plus propodeum of abdomen). They avoid the head and gaster, even if closer to the lizard, and if prey directional movement is reversed. Orientation of captured ants during retraction is with head first (rostral), thus providing initial mucus coating of the mandibles. Prey capture accuracy and precise handling illustrates the specificity of adaptations of horned lizards in avoiding harm, and the challenges lizards face when feeding on dangerous prey.
COVID-19: state population coverage by mask orders in the US
Authors: Jacobs Philip , Ohinmaa Arvi 
Published: February 2021

Background: A variety of government bodies in the US - cities and tribal councils, counties, and states - have issued mask-wearing orders to prevent the spread of COVID-19. Methods: We measured the duration of these orders and the populations covered by them in each of the governed areas. We measured the in effect days from April 3, 2020 (the date of the first mask order) to November 30, 2020; the duration of the measured period amounts to 241 days. We used data generated from local and state governments, and news organizations to measure the enactment dates and the duration of the orders; and from the US Census Bureau (dated 2019) to measure municipal, county, and state populations. Results: The average coverage over all states was 57.7% of the maximum person days of coverage. States which issued statewide orders from their governors had a total of 67.1% coverage; this includes coverage from regional government orders prior to the statewide orders. States with orders only from municipal or county councils had on average 27.1% coverage. Conclusion: Overall, state governments took leadership in the implementation of mask orders.
Comparison of a standardized four-point bending test to an implant system test of an osteosynthetic system under static and dynamic load condition
Authors: Halbauer Christian , Schorler Hendrik , Liberto Laura , Capanni Felix 
Published: February 2021

Abstract
Current test standards of osteosynthetic implants examine the bone plate and screw separately leading to unrealistic load scenarios and unknown performance of the system as a whole, which prevents the identification of characteristic failures in clinical use. A standardized static and dynamic four-point bending test (ASTM F382) was performed on a bone plate. Based on that standard, an advanced implant system test (IST) was designed and performed to test a mechanical construct consisting of a bone plate, screws and an artificial bone substitute out of Polyoxymethylene (POM). The test object was an osteosynthetic system to treat fractured ulna bones. Both results of the conventional and advanced test method were analyzed and compared to one another. The static results show a similar yield point (YP) relative to the bending moment with just 9% difference. Dynamic results show a bi-phasic behavior of the displacement vs. cycle data for the IST. The secondary phase can be defined as a constantly increasing plastic deflection or ratcheting effect quantified by its slope in mm per one million cycles, leading to a 10 times higher slope for the IST than the conventional test. The IST has a high impact on the test results and the resultant interpretation of the mechanical behavior of the osteosynthetic system. A constantly increasing plastic deflection might lead to fatigue failures and to a loss of the mechanical durability. The development of new standardizations referring to the whole system within reasonable boundary conditions of individual biomechanical applications is crucial for high quality mechanical analysis.
Quality evaluation of smartphone applications for laboratory medicine
Authors: Jovičić Snežana , Siodmiak Joanna , Watson Ian D. 
Published: February 2021

Abstract

Background
Many of the mobile applications (apps) used for delivering health interventions involve laboratory medicine data. This survey was conducted to search the online market for health apps that manage laboratory medicine data. The aim was to review them and perform a quality evaluation.

Methods
Apps search criteria were “Lab results blood work”, “Lab results”, and “Health apps”. After the stepwise exclusion process, 52 selected apps were downloaded and analyzed. For review and content analysis of the apps, a multidimensional tool for classifying and rating the quality of mobile health apps – Mobile App Rating Scale (MARS), was used.

Results
Selected apps were classified into five categories according to their intended use by patients or physicians, and the type of data engaged. Spearman’s correlation analysis found significant correlations between MARS individual scoring items, as with the subjective quality and number of technical aspects. Kruskal-Wallis analysis showed a significant difference in the number of technical aspects employed, MARS engagement and informational quality score items, total score, and subjective quality. The lowest values for all of these items were in the category of apps designed for patients, and the post hoc test showed that the difference was statistically significant between this and the values in all other categories.

Conclusions
Apps designed for patients, are of the poorest quality, considering the total quality of the content and information they provide, estimated using the MARS tool. This estimation needs to be validated for laboratory medicine apps, and eventually modified after consideration of specific quality benchmarks.
Contingency learning and perfective morpheme productivity in L2 Italian: A study on lexeme–morpheme associations with ΔP
Authors: Rastelli Stefano 
Published: February 2021

AbstractThis study utilized unidirectional association score ΔPto track perfective morpheme productivity in longitudinal spoken L2 Italian data. Research questions concerned whether early L2 perfectives were contingent upon telicity of predicates, whether lexeme–morpheme association changed as proficiency increased, and whether distribution of perfectives in the L1 input affected the patterns of morpheme emergence. Results showed that (i) the productive use of the perfective was contingent upon a few, infrequent telic predicates but also upon some actionally underspecified, very frequent general-purpose ones; (ii) a generalized decrease in association scores over time accompanied the productivity of the perfective morpheme; (iii) distribution of perfectives in L2 data did not reflect distribution in the L1 input. The statistical analysis adopted in this study is replicable to other domains where contingency of stem-affix alternations may provide cues for observing the developing L2 grammar
Effect of interaction between two single-particle-impingements on the repassivation behavior of 304 stainless steel in a simulated groundwater
Authors: Feng Xingguo , Zhao Yang , Lu Xiangyu , Fattahpour Vahidoddin , Roostaei Morteza , Mahmoudi Mahdi , Zeng Hongbo , Luo Jing-Li 
Published: February 2021

Abstract
To investigate the effect of interaction between two single-Si3N4 particle-impingements on the repassivation of 304 stainless steel in a simulated groundwater, the corrosion current peaks of the samples during the impingement were recorded, and the micro-hardness of the substrate around the crater was tested. The results indicated that significant interactions between the two impingements were observed only when the value of distance-diameter ratio (L/d) was less than 1.5. With L/d being less than 1.5, the corrosion current peaks and mass losses due to the second impingements were higher than those of the first ones, and the re-passivation rates of samples during the second impingements were lower than those of the first impingements. Simultaneously, the microhardness of the substrate between the two craters was higher than that of the surface around one single crater with the same distance-diameter ratio. The mechanisms of how the L/d ratio influenced the interaction between the two impingements are also discussed.
Monoamniotic twins pregnancy complicated by a fetal congenital heart defect – a challenge for perinatal decisions
Authors: Pasieczna Monika , Kuran-Ohde Joanna , Kajdy Anna , Filipecka-Tyczka Dagmara , Świątek Natalia , Szymkiewicz-Dangel Joanna 
Published: February 2021

Abstract

Objectives
To analyze pregnancy management and postnatal follow-up in monochorionic monoamniotic (MCMA) pregnancies complicated by a congenital heart defect (CHD) in one twin and to compare the results with current recommendations concerning time and mode of delivery in MCMA pregnancies.

Cases presentation
Perinatal medical records of five pairs of monoamniotic twins referred to Fetal Cardiology Department were analyzed. 5 out of 23 MCMA pregnancies (21.7%) were complicated by CHD in one fetus. Cesarean section (CS) was performed between 32 and 35 weeks of gestation (WoG). 9 out of 10 neonates had respiratory failure, including all patients with CHD. Twins without congenital abnormalities spent median 21 days (range 10–40 days) in neonatal units. Patients with CHD were transferred to cardiology departments on average 6th day of life. All were operated on later than term-born neonates, 4 out of 5 required stage surgery and their median stay in the hospital was 75 days (range 48–106 days).

Conclusions
According to current recommendations, delivery in MCMA pregnancies should be scheduled at 32–34 weeks. In cases complicated by CHD in one twin, such early delivery complicates surgical treatment and may affect the final outcome. Low body weight and respiratory disorders increase the risk of complications in the perioperative period and prolong hospitalization.
Diagnostic error as a result of drug-laboratory test interactions
Authors: van Balveren Jasmijn A. , Verboeket-van de Venne Wilhelmine P.H.G. , Erdem-Eraslan Lale , de Graaf Albert J. , Loot Annemarieke E. , Musson Ruben E.A. , Oosterhuis Wytze P. , Schuijt Martin P. , van der Sijs Heleen , Verheul Rolf J. , de Wolf Holger K. , Kusters Ron , Hoedemakers Rein M.J. 
Published: February 2021

Abstract

Background
Knowledge of possible drug-laboratory test interactions (DLTIs) is important for the interpretation of laboratory test results. Test results may be affected by physiological or analytical drug effects. Failure to recognize these interactions may lead to misinterpretation of test results, a delayed or erroneous diagnosis or unnecessary extra tests or therapy, which may harm patients.

Content
Thousands of interactions have been reported in the literature, but are often fragmentarily described and some papers even reported contradictory findings. How can healthcare professionals become aware of all these possible interactions in their individual patients? DLTI decision support applications could be a good solution. In a literature search, only four relevant studies have been found on DLTI decision support applications in clinical practice. These studies show a potential benefit of automated DLTI messages to physicians for the interpretation of laboratory test results. All physicians reported that part of the DLTI messages were useful. In one study, 74% of physicians even sometimes refrained from further additional examination.

Summary and outlook
Unrecognized DLTIs potentially cause diagnostic errors in a large number of patients. Therefore, efforts to avoid these errors, for example with a DLTI decision support application, could tremendously improve patient outcome.
Growth behavior of wood-destroying fungi in chemically modified wood: wood degradation and translocation of nitrogen compounds
Authors: Emmerich Lukas , Bleckmann Maja , Strohbusch Sarah , Brischke Christian , Bollmus Susanne , Militz Holger 
Published: February 2021

Abstract
Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot (Trametes versicolor), brown rot (Coniophora puteana) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing.
Understanding the effects of (dis)similarity in affiliative and aggressive humor styles between supervisor and subordinate on LMX and energy
Authors: Tremblay Michel 
Published: February 2021

Abstract
Prior studies on humor have primarily focused on the effects of either leader or subordinate humor styles and thus have neglected the influence of (dis)similarity in humor styles between supervisor and subordinate. We draw on the similarity-attraction perspective to suggest that (dis)similarity in supervisor’s and subordinate’s affiliative and aggressive humor influences workplace energy via the leader-member exchange (LMX). Results show that LMX is higher when leader and subordinate both display high-affiliative and low-aggressive humor behaviors. Furthermore, LMX is higher when a low-affiliative humor subordinate is paired with a high-affiliative humor leader and when a high-aggressive humor subordinate is paired with a low-aggressive humor leader. Our findings reveal that LMX mediated the relationship between (dis)similarity in humor styles and employee energy. Taken together, our results contribute to the understanding of the effects of similarity and dissimilarity in humor behaviors in energic relational processes.
Numerical study on gas–liquid two-phase flow and mass transfer in a microchannel
Authors: Zunlong Jin , Yonghao Liu , Rui Dong , Dingbiao Wang , Xiaotang Chen 
Published: February 2021

Abstract
A numerical study of the gas–liquid two-phase flow and mass transfer in a square microchannel with a T-junction is carried out in this work. Through numerical simulation methods, the flow patterns of bubble flow, slug flow and annular flow are determined. By proposing a new flow pattern conversion relationship with different media and different speeds, 100 sets of CO2-water flow patterns and 100 sets of CO2-ethanol flow patterns are obtained. The effects of surface tension on flow pattern, bubble length and liquid plug length are studied. The pressure distribution and pressure drop are analyzed, and mass transfer is obtained through slug flow simulation, and the influencing factors of gas–liquid mass transfer are studied. The results show that the effect of surface tension on the length of the bubble and the length of the liquid plug is completely opposite, the pressure distribution is stepped, and the pressure drop increases with the increase of the gas–liquid velocity. In addition, it was found that the volumetric mass transfer coefficients of the bubble cap and the liquid film gradually decreased with time, and eventually stabilized. The increase in bubble velocity accelerates the mass transfer rate, while the increase in unit cell length slows the mass transfer rate. However, the influence of film thickness and liquid film length on mass transfer varies with time.
Optimal control of nonlinear systems with dynamic programming
Authors: Tawiah Isaac , Song Yinglei 
Published: February 2021

Abstract
In this paper, a generalized technique for solving a class of nonlinear optimal control problems is proposed. The optimization problem is formulated based on the cost-to-go functional approach and the optimal solution can be obtained by Bellman’s technique. Specifically, a continuous nonlinear system is first discretized and a set of equality constraints can be obtained from the discretization. We show that, under a certain condition, the optimal solution of a problem in this class can be approximated by a solution of the set of equality constraints within any precision and the system is guaranteed to be stable under a control signal obtained from the solution. An iterative approach is then applied to numerically solve the set of equality constraints. The technique is tested on a nonlinear control problem from the class and simulation results show that the approach is not only effective but also leads to a fast convergence and accurate optimal solution.
Numerical study of multi-dimensional hyperbolic telegraph equations arising in nuclear material science via an efficient local meshless method
Authors: Ahmad Imtiaz , Seadawy Aly R. , Ahmad Hijaz , Thounthong Phatiphat , Wang Fuzhang 
Published: February 2021

Abstract
This research work is to study the numerical solution of three-dimensional second-order hyperbolic telegraph equations using an efficient local meshless method based on radial basis function (RBF). The model equations are used in nuclear material science and in the modeling of vibrations of structures. The explicit time integration technique is utilized to semi-discretize the model in the time direction whereas the space derivatives of the model are discretized by the proposed local meshless procedure based on multiquadric RBF. Numerical experiments are performed with the proposed numerical scheme for rectangular and non-rectangular computational domains. The proposed method solutions are converging quickly in comparison with the different existing numerical methods in the recent literature.