bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Thermocline Biases in the Tropical North Pacific and Their Attributions
Authors: Zhu Yuchao , Zhang Rong-Hua , Li Delei , Chen Dake 
Published: December 2020

AbstractThe tropical thermocline plays an important role in regulating equatorial sea surface temperature (SST); at present, it is still poorly simulated in the state-of-the-art climate models. In this paper, thermocline biases in the tropical North Pacific are investigated using the newly released CMIP6 historical simulations. It is found that CMIP6 models tend to produce an overly shallow thermocline in the northwestern tropics, accompanied by a deep thermocline in the northeastern tropics. A pronounced thermocline strength bias arises in the tropical northeastern Pacific, demonstrating a dipole structure with a sign change at about 8°N. These thermocline biases are accompanied with biases in the simulations of oceanic circulations, including a too weak North Equatorial Countercurrent (NECC), a reduction in water exchanges between the subtropics and the equatorial regions, and an eastward extension of the equatorward interior water transport. The causes of these thermocline biases are further analyzed. The thermocline bias is primarily caused by the model deficiency in simulating the surface wind stress curl, which can be further attributed to the longstanding double-ITCZ bias in the tropical North Pacific. Besides, thermocline strength bias can be partly attributed to the poor prescription of oceanic background diffusivity. By constraining the diffusivity to match observations, the thermocline strength in the tropical northeastern Pacific is greatly increased.
Wind-Driven Oscillations in the Meridional Overturning Circulation near the equator. Part I: Numerical Models
Authors: Blaker Adam T. , Hirschi Joël J.-M. , Bell Michael J. , Bokota Amy 
Published: December 2020

AbstractThe great ocean conveyor presents a time-mean perspective on the interconnected network of major ocean currents. Zonally integrating the meridional velocities, either globally or across basin-scale domains, reduces the conveyor to a 2D projection widely known as the meridional overturning circulation (MOC). Recent model studies have shown the MOC to exhibit variability on near-inertial time scales, and also indicate a region of enhanced variability on the equator. We present an analysis of three integrations of a global configuration of a numerical ocean model, which show very large amplitude oscillations in the MOCs in the Atlantic, Indian, and Pacific Oceans confined to the equatorial region. The amplitude of these oscillations is proportional to the width of the ocean basin, typically about 100 (200) Sv (1 Sv ≡ 106 m3 s−1) in the Atlantic (Pacific). We show that these oscillations are driven by surface winds within 10°N/S of the equator, and their periods (typically 4–10 days) correspond to a small number of low-mode equatorially trapped planetary waves. Furthermore, the oscillations can be well reproduced by idealized wind-driven simulations linearized about a state of rest.
Lidar Observations of a Mesoscale Moisture Transport Event Impacting Convection and Comparison to Rapid Refresh Model Analysis
Authors: Carroll Brian J. , Demoz Belay B. , Turner David D. , Delgado Ruben 
Published: December 2020

AbstractThe 2015 Plains Elevated Convection at Night (PECAN) field campaign provided a wealth of intensive observations for improving understanding of interplay between the Great Plains low-level jet (LLJ), mesoscale convective systems (MCSs), and other phenomena in the nocturnal boundary layer. This case study utilizes PECAN ground-based Doppler and water vapor lidar and airborne water vapor lidar observations for a detailed examination of water vapor transport in the Great Plains. The chosen case, 11 July 2015, featured a strong LLJ that helped sustain an MCS overnight. The lidars resolved boundary layer moisture being transported northward, leading to a large increase in water vapor in the lowest several hundred meters above the surface in northern Kansas. A branch of nocturnal convection initiated coincident with the observed maximum water vapor flux. Radiosondes confirmed an increase in convective potential within the LLJ layer. Moist static energy (MSE) growth was generated by increasing moisture in spite of a temperature decrease in the LLJ layer. This unique dataset is also used to evaluate the Rapid Refresh (RAP) analysis model performance, comparing model output against the continuous lidar profiles of water vapor and wind. While the RAP analysis captured the large-scale trends, errors in water vapor mixing ratio were found ranging from 0 to 2 g kg−1 at the ground-based lidar sites. Comparison with the airborne lidar throughout the PECAN domain yielded an RMSE of 1.14 g kg−1 in the planetary boundary layer. These errors mostly manifested as contiguous dry or wet regions spanning spatial scales on the order of ten to hundreds of kilometers.
Microphysical Enhancement Processes within Stratiform Precipitation on the Barrier and Sub-Barrier Scale of the Olympic Mountains
Authors: Zagrodnik Joseph P. , McMurdie Lynn , Conrick Robert 
Published: December 2020

AbstractHigh-resolution numerical model simulations of six different cases during the 2015/16 Olympic Mountains Experiment (OLYMPEX) are used to examine dynamic and microphysical precipitation processes on both the full barrier-scale and smaller sub-barrier-scale ridges and valleys. The degree to which stratiform precipitation within midlatitude cyclones is modified over the coastal Olympic Mountains range was found to be strongly dependent on the synoptic environment within a cyclone’s prefrontal and warm sectors. In prefrontal sectors, barrier-scale ascent over stably stratified flow resulted in enhanced ice production aloft at the coast and generally upstream of higher terrain. At low levels, stable flow orientated transverse to sub-barrier-scale windward ridges generated small-scale mountain waves, which failed to produce enough cloud water to appreciably enhance precipitation on the scale of the windward ridges. In moist-neutral warm sectors, the upstream side of the barrier exhibited broad ascent oriented along the windward ridges with lesser regions of adjacent downward motion. Significant quantities of cloud water were produced over coastal foothills with further production of cloud water on the lower-windward slopes. Ice production above the melting layer occurred directly over the barrier where the ice particles were further advected downstream by cross-barrier winds and spilled over into the lee. The coastal foothills were found to be essential for the production and maintenance of cloud water upstream of the primary topographic barrier, allowing additional time for hydrometeors to grow to precipitation size by autoconversion and collection before falling out on the lower-windward slopes.
Evaluating Forecast Performance and Sensitivity to the GSI EnKF Data Assimilation Configuration for the 28–29 May 2017 Mesoscale Convective System Case
Authors: Labriola Jonathan , Jung Youngsun , Liu Chengsi , Xue Ming 
Published: December 2020

AbstractIn an effort to improve radar data assimilation configurations for potential operational implementation, GSI EnKF data assimilation experiments based on the operational system employed by the Center for Analysis and Prediction of Storms (CAPS) real-time Spring Forecast Experiments are performed. These experiments are followed by 6-h forecasts for an MCS on 28–29 May 2017. Configurations examined include data thinning, covariance localization radii and inflation, observation error settings, and data assimilation frequency for radar observations. The results show experiments that assimilate radar observations more frequently (i.e., 5–10 min) are initially better at suppressing spurious convection. However, assimilating observations every 5 min causes spurious convection to become more widespread with time, and modestly degrades forecast skill through the remainder of the forecast window. Ensembles that assimilate more observations with less thinning of data or use a larger horizontal covariance localization radius for radar data predict fewer spurious storms and better predict the location of observed storms. Optimized data thinning and horizontal covariance localization radii have positive impacts on forecast skill during the first forecast hour that are quickly lost due to the growth of forecast error. Forecast skill is less sensitive to the ensemble spread inflation factors and observation errors tested during this study. These results provide guidance toward optimizing the configuration of the GSI EnKF system. Among the DA configurations tested, the one employed by the CAPS Spring Forecast Experiment produces the most skilled forecasts while remaining computationally efficient for real-time use.
Oxytocin-induced facilitation of learning in a probabilistic task is associated with reduced feedback- and error-related negativity potentials
Authors: Zhuang Qian , Zhu Siyu , Yang Xue , Zhou Xinqi , Xu Xiaolei , Chen Zhuo , Lan Chunmei , Zhao Weihua , Becker Benjamin , Yao Shuxia , Kendrick Keith M 
Published: December 2020

Background: Feedback evaluation of actions and error response detection are critical for optimizing behavioral adaptation. Oxytocin can facilitate learning following social feedback but whether its effects vary as a function of feedback valence remains unclear. Aims: The present study aimed to investigate whether oxytocin would influence responses to positive and negative feedback differentially or equivalently. Methods: The present study employed a randomized, double-blind, placebo controlled within-subject design to investigate whether intranasal oxytocin (24 IU) influenced behavioral and evoked electrophysiological potential responses to positive or negative feedback in a probabilistic learning task. Results: Results showed that oxytocin facilitated learning and this effect was maintained in the absence of feedback. Using novel stimulus pairings, we found that oxytocin abolished bias towards learning more from negative feedback under placebo by increasing accuracy for positively reinforced stimuli. Oxytocin also decreased the feedback-related negativity difference (negative minus positive feedback) during learning, further suggesting that it rendered the evaluation of positive and negative feedback more equivalent. Additionally, post-learning oxytocin attenuated error-related negativity amplitudes but increased the late error positivity, suggesting that it may lower conflict detection between actual errors and expected correct responses at an early stage of processing but at a later stage increase error awareness and motivation for avoiding them. Conclusions: Oxytocin facilitates learning and subsequent performance by rendering the impact of positive relative to negative feedback more equivalent and also by reducing conflict detection and increasing error awareness, which may be beneficial for behavioral adaption.
Study protocol to investigate the correlation between Tourette syndrome and allergy in children and adolescents
Authors: Tsai Lee-Hou , Lin Jeng-Wen , Lue Ko-Huang 
Published: December 2020

Objective Noting that the usefulness of cases diagnosed in administrative registers is dependent on diagnostic validity, in this study, we aim to elucidate the correlation between Tourette syndrome and allergy in children and adolescents, specifically with regard to incidence of asthma, allergic rhinitis, allergic conjunctivitis, and atopic dermatitis. Methods Based on a set of inclusion and exclusion criteria, we intend to enroll 200 children and adolescents aged 18 years and younger, accompanied by their parents, for a duration of 2 years. We will administer an anonymous questionnaire in a case–control study. We will use the chi-squared test to evaluate differences between cases and controls. Results According to the European Review for Medical and Pharmacological Sciences, the proportion of allergic diseases expected in patients with Tourette syndrome is 53.1% (17/32) and 22.9% (8/35) in the controls. Setting the type 1 error to 0.05 and the power to 0.8, we will ensure a 1:2 case-to-control ratio. Conclusions This study protocol describes our analysis of anonymous questionnaire responses. Comorbidity rates, environmental factors, and genetic factors for various allergens, allergies, and other neuropsychiatric disorders will be studied.
Duration of Breastfeeding in Late Preterm Infants: Maternal and Infant Factors
Authors: Handayani Kartika Darma , Irwanto  , Masturina Melinda , Etika Risa , Harianto Agus , Sauer Pieter J.J. 
Published: December 2020

Background More than 550,000 late preterm infants are born each year in Indonesia. These infants, born between 340/7–366/7 weeks, have more complications than term infants. Breastfeeding is considered the most optimal nutrition for newborn infants. Two groups of factors are important for successful breastfeeding: infant and maternal factors. The infant factors can be evaluated using the Infant Breastfeeding Assessment Tool and the maternal aspects with the Breastfeeding Self-Efficacy Scale–Short Form. Aim To determine whether the Infant Breastfeeding Assessment Tool or the Breastfeeding Self-Efficacy Scale–Short Form was more predictive of successful breastfeeding among late preterm infants. Methods This study was conducted in the Academic Teaching Hospital in Surabaya, Indonesia in March–July 2017. Mothers who delivered their infant between a gestational age of 340/7 and 366/7 weeks were included. Results Fifty-four single born participant mother–infant pairs were included. The mean total Breastfeeding Self-Efficacy Scale–Short Form score was 57.8 ( SD = 8.9). The mean Infant Breastfeeding Assessment Tool score was 8.3 ( SD = 1.8). There was a significant correlation between the total Breastfeeding Self-Efficacy Scale–Short Form score and the Infant Breastfeeding Assessment Tool score ( p = .020, r = 0.316). The Breastfeeding Self-Efficacy Scale–Short Form was significantly higher in the participant (mothers) of the infants breastfed ≥ 4 months, compared to < 4 months, 61.59 ( SD = 5.78) versus 51.78 ( SD = 11.64; p = .001). No correlation was found between the duration of breastfeeding and Infant Breastfeeding Assessment Tool score ( p = .087) Conclusion Maternal factors were more important for successful breastfeeding in these late preterm infants than infant factors in our sample.
“Paying it Forward” – Swedish Women’s Experiences of Donating Human Milk
Authors: Olsson Emma , Diderholm Barbro , Blomqvist Ylva Thernström 
Published: December 2020

Background Human milk is recommended as the only nutritional source during the first 6 months of life. For preterm infants, the benefits of human milk are even more important and can alleviate the negative influences of preterm birth. Research aim To describe how Swedish human milk donors experienced the donation process. Method A prospective mixed methods mail survey was designed. It was sent to human milk donors ( N = 72) at two Swedish hospitals. Quantitative data are presented with descriptive statistics and qualitative data were analyzed using qualitative content analysis. Results The infants were between newborn and 17 weeks of age when the participants started their human milk donations, and the duration of the donation period lasted 1–24 weeks. The overall theme identified was the participants’ strong desire to help infants, often expressed as being involved in saving infants’ lives. Many participants experienced difficulties getting the information needed to become human milk donors; for others, expressing milk required both time and energy that they could otherwise spend with their own newborn infants. Conclusion Donating human milk can be experienced as a demanding and strenuous task. Therefore, it is important that women who donate human milk receive the practical help from health care staff that they feel they need. Furthermore, information and knowledge about the possibility of donating human milk, and how important human milk is for preterm and/or sick infants, are important in order to increase the number of women willing to donate human milk.
Barriers to the Success of Recreational Groups for Persons With Dementia
Authors: Cohen-Mansfield Jiska , Jensen Barbara 
Published: December 2020

Background: This paper describes barriers to engagement in the context of group activities attended by nursing home residents with dementia. Objective: The goal is to clarify the presence and types of barriers to group activities for persons with dementia. Methods: Therapeutic recreation staff (TRs) who conducted the group activities, and trained research observers (ROs) independently identified barriers occurring during group activity sessions through ratings and open-ended comments, which were analyzed via a mixed-method approach. Results: Barriers were related to specific participant, environmental, and group session characteristics. Most frequently noted barriers were participant-related, pertaining to apathy and challenging behavior. Noise was the most frequent environmental barrier. Overall, ROs reported more barriers than TRs, yet TRs reported the barrier of inappropriate topic more frequently than ROs. Conclusions: The study suggests that the number and specific types of barriers are associated with negative engagement outcomes. Insight into these barriers is the first step toward addressing them and minimizing their effects.
Diclofenac for prophylaxis of heterotopic ossification after hip arthroplasty: a systematic review
Authors: Haffer Henryk , Müller Michael , Ascherl Rudolf , Perka Carsten , Winkler Tobias 
Published: December 2020

Background: Heterotopic ossification (HO) is defined as the formation of lamellar bone in extraskeletal soft tissues. HO can be a severe complication after hip arthroplasty but can possibly be prevented by postoperative treatment with non-steroidal anti-inflammatory drugs (NSAIDs) or radiotherapy. Diclofenac is 1 of the most used drugs in HO prophylaxis because it is effective and long established. However, there is still no uniform therapy regimen in terms of duration, dose and side effect profile regarding the application of diclofenac in HO prevention. We have, therefore, conducted the first systematic review investigating diclofenac for HO prophylaxis after hip arthroplasty. The aim of this study is to assess the efficacy, dose and duration of diclofenac therapy in preventing HO after total hip arthroplasty (THA). Methods: According to the PRISMA Guidelines we performed a systematic literature search in EMBASE via Ovid, in MEDLINE via PubMed and in the Cochrane Library addressing all studies in English and German regarding the prophylaxis of HO with diclofenac after THA. We identified 731 potential studies and included 6 randomised controlled trials with 957 patients. Results: The studies were heterogeneous with regard to duration of therapy, dose, comparative group and follow-up period. The therapy duration ranged from 9 to 42 days, the applied diclofenac doses ranged from 75 mg to 150 mg daily. Patients treated with diclofenac showed a significant reduction in the total incidence of HO regarding to the Brooker Classification compared to placebo and no clinically relevant ossifications occured (Brooker III and IV). Conclusions: Diclofenac is efficacious in the prevention of HO and can be used routinely after THA. The existing data indicates that a minimum dose of 75 mg diclofenac per day started on the first postoperative day for a minimum of 9 days is needed to prevent HO with an acceptable incidence of side effects, such as gastrointestinal symptoms.
The Educational Value and Emotional Impact on Medical Students After Participating in Transplant Organ Retrieval
Authors: Reed Alistair J. M. , Baldwin-Smith Rhiannon , Arwyn-Jones James , Knight Simon , Quiroga Isabel 
Published: December 2020

Introduction: Medical students and healthcare professionals lack knowledge and confidence in organ transplantation which stems in part from a lack of exposure to transplant surgery at medical school. To address this, we developed a program that allowed students to attend organ retrievals and assessed its efficacy as an educational intervention. Methods: Students were invited to attend organ retrievals through a voluntary program. Students then completed an anonymous, self-administered questionnaire (n = 40) designed to capture the perceived educational value and emotive impact of attending an organ retrieval, and its effect on career aspirations. Quantitative and qualitative data were analyzed. Results: 100% of students would recommend attending an organ retrieval to a colleague. Students strongly agreed that attending an organ retrieval was a useful learning experience (87.5%) and 90% of students felt more confident discussing organ donation with patients and relatives. 50% of students were more likely to pursue a career in transplant surgery. Students recognized a number of difficulties associated with the emotive impact of organ procurement. Conclusion: An organ retrieval program for medical students offers a novel learning opportunity, and may increase knowledge and improve attitudes toward transplantation in future healthcare professionals. However, the emotive impact of exposing students to organ retrievals must also be recognized.
Dose Prescription Methods in Stereotactic Body Radiotherapy for Small Peripheral Lung Tumors: Approaches Based on the Gross Tumor Volume Are Superior to Prescribing a Dose That Covers 95% of the Planning Target Volume
Authors: Komiyama Takafumi , Saito Masahide , Kuriyama Kengo , Marino Kan , Aoki Shinichi , Saito Ryo , Muramatsu Juria , Maehata Yoshiyasu , Ze Chen , Akita Tomoko , Yamada Takashi , Sano Naoki , Yoshizawa Kazuya , Kazunari Ashizawa , Hidekazu Suzuki , Ueda Koji , Vu Nam , Onishi Hiroshi 
Published: December 2020

Background and Purpose: We aimed to validate the usefulness of prescriptions based on gross tumor volume for stereotactic body radiotherapy for small peripheral lung tumors. Materials and Methods: Radiotherapy treatment planning data of 50 patients with small peripheral lung tumors (adenocarcinoma: 24, squamous cell carcinoma: 10, other: 1, unknown: 15) receiving breath-hold computed tomography-guided stereotactic body radiotherapy at our institution during 2013–2016 were analyzed. For each case, 3 dose prescription methods were applied: one based on 95% (PTVD95%) of the planning target volume, one based on 50% of the gross tumor volume (GTVD50%), and one based on 98% (GTVD98%) of the gross tumor volume. The maximum (GTVDmax), minimum (GTVDmin), and mean gross tumor volume dose (GTVDmean) and the dose covering 98% of the gross tumor volume were calculated to evaluate variations in the gross tumor volume dose. Results: Upon switching to GTVD50%, the variations in GTVDmax and GTVDmean decreased significantly, compared with variations observed for PTVD95% (p < 0.01), but the variation in GTVDmin increased significantly (p < 0.01). Upon switching to the GTVD98%, the variation in GTVDmean decreased significantly compared with that observed for PTVD95% (p < 0.01). Conclusion: Switching from prescriptions based on 95% of the planning target volume to those based on 98% of the gross tumor volume decreased variations among cases in the overall gross tumor volume dose. Overall, prescriptions based on 98% of the gross tumor volume appear to be more suitable than those based on 95% of the planning target volume in cases of small peripheral lung tumors treated with stereotactic body radiotherapy.