bluuebunny/crossref_metadata_2025_split huggingface dataset:
Coexistence Phenomena in the Hénon Family
Authors: Benedicks Michael , Palmisano Liviana 
Published: July 2023

AbstractWe study the classical Hénon family $$f_{a,b}:(x,y)\mapsto (1-ax^2+y,bx)$$

f

a
,
b

:

(
x
,
y
)

↦

(
1
-
a

x
2

+
y
,
b
x
)

, $$0<a<2$$

0
<
a
<
2

, $$0<b<1$$

0
<
b
<
1

, and prove that given an integer $$k\ge 1$$

k
≥
1

, there is a set of parameters $$E_k$$

E
k

of positive two-dimensional Lebesgue measure so that $$f_{a,b}$$

f

a
,
b

, for $$(a,b)\in E_k$$

(
a
,
b
)

∈

E
k

, has at least k attractive periodic orbits and one strange attractor of the type studied in Benedicks and Carleson (Ann Math (2) 133(1):73–169, 1991). A corresponding statement also holds for the Hénon-like families of Mora and Viana (Acta Math 171:1–71, 1993), and we use the techniques of Mora and Viana (1993) to study homoclinic unfoldings also in the case of the original Hénon maps. The final main result of the paper is the existence, within the classical Hénon family, of a positive Lebesgue measure set of parameters whose corresponding maps have two coexisting strange attractors.
Applying WHO2013 diagnostic criteria for gestational diabetes mellitus reveals currently untreated women at increased risk
Authors: Scheuer Cathrine Munk , Jensen Dorte Møller , McIntyre H. David , Ringholm Lene , Mathiesen Elisabeth Reinhardt , Nielsen Celina Pforr Korsgård , Nolsöe Rúna Louise Mortansdóttir , Milbak Julie , Hillig Thore , Damm Peter , Overgaard Martin , Clausen Tine Dalsgaard 
Published: July 2023

Abstract
Aims
To estimate the prevalence of gestational diabetes mellitus (GDM) in a Danish cohort comparing the current Danish versus the WHO2013 diagnostic criteria, and to evaluate adverse pregnancy outcomes among currently untreated women in the gap between the diagnostic thresholds.

Methods
Diagnostic testing was performed by a 75 g oral glucose tolerance test (OGTT) at 24–28 weeks’ gestation in a cohort of pregnant women. GDM diagnosis was based on the current Danish criterion (2-h glucose ≥ 9.0 mmol/L, GDMDK) and on the WHO2013 criteria (fasting ≥ 5.1, 1 h ≥ 10.0 or 2 h glucose ≥ 8.5 mmol/L, GDMWHO2013). Currently untreated women fulfilling the WHO2013 but not the Danish diagnostic criteria were defined as New-GDM-women (GDMWHO2013-positive and GDMDK-negative). Adverse outcomes risks were calculated using logistic regression.

Results
OGTT was completed by 465 women at a median of 25.7 weeks’ gestation. GDMDK prevalence was 2.2% (N = 10) and GDMWHO2013 21.5% (N = 100). New-GDM was present in 19.4% (N = 90), of whom 90.0% had elevated fasting glucose. Pregnancies complicated by New-GDM had higher frequencies of pregnancy-induced hypertension (13.3% vs 4.1%, p = 0.002), large-for-gestational-age infants (22.2% vs 9.9%, p = 0.004), neonatal hypoglycaemia (8.9% vs 1.9%, p = 0.004) and neonatal intensive care unit admission (16.7% vs 5.8%, p = 0.002) compared to pregnancies without GDM.

Conclusions
GDM prevalence increased tenfold when applying WHO2013 criteria in a Danish population, mainly driven by higher fasting glucose levels. Untreated GDM in the gap between the current Danish and the WHO2013 diagnostic criteria resulted in higher risks of adverse pregnancy outcomes.
Effects of downstream environmental flow release on enhancing the groundwater recharge and restoring the groundwater/surface-water connectivity in Yongding River, Beijing, China
Authors: Liu Sida , Zhou Yangxiao , Zang Yining , McClain Michael E. , Wang Xu-sheng 
Published: July 2023

AbstractThe Yongding River (Beijing, China) was dry most times of the year, and groundwater storage was severely depleted. To address this issue, a river rehabilitation project was initiated. A downstream environmental flow release (EFR) project from upstream reservoirs has been implemented since 2019. This study evaluated the impact of EFR by constructing transient groundwater-flow and numerical tracer transport models to simulate the hydrogeological responses to the water release events in 2019–2020. The study identified two factors that significantly influence the river leakage rate, which are operational factors (i.e., water release rate and duration) and physical factors (i.e., hydraulic properties of the riverbed, regional hydraulic gradients, and groundwater depth) that determine the maximum water availability for groundwater recharge and maximum infiltration capacity, respectively. Predictive modelling was performed to assess the long-term effects of the proposed EFR scheme from 2021 to 2050, which showed that groundwater levels along the river will increase by 10–20 m by 2050. Groundwater storage is expected to be largely recovered and groundwater/surface-water connectivity in the middle reach of the river will be restored. This restoration will not only maintain the environmental flow for the benefit of ecosystems but also enhance groundwater recharge, promoting sustainable groundwater development in the region. Overall, this study provides valuable insights into the effectiveness of the proposed EFR scheme in achieving sustainable groundwater development in the region.
“Because There’s Experts That Do That”: Lessons Learned by Health Care Organizations When Partnering with Community Organizations
Authors: Beidler Laura B. , Fichtenberg Caroline , Fraze Taressa K. 
Published: July 2023

Abstract
Background
Health care organizations’ partnerships with community-based organizations (CBOs) are increasingly viewed as key to improving patients’ social needs (e.g., food, housing, and economic insecurity). Despite this reliance on CBOs, little research explores the relationships that health care organizations develop with CBOs.

Objective
Understand how health care organizations interact with CBOs to implement social care.

Design
Thirty-three semi-structured telephone interviews collected April–July 2019.

Participants
Administrators at 29 diverse health care organizations with active programming related to improving patients’ social needs. Organizations ranged from multi-state systems to single-site practices and differed in structure, size, ownership, and geography.

Measures
Structure and goals of health care organizations’ relationship with CBOs.

Results
Most health care organizations (26 out of 29) relied on CBOs to improve their patients’ social needs. Health care organization’s goals for social care activities drove their relationships with CBOs. First, one-way referrals to CBOs did not require formal relationships or frequent interactions with CBOs. Second, when health care organizations contracted with CBOs to deliver discrete services, leadership-level relationships were required to launch programs while staff-to-staff interactions were used to maintain programs. Third, some health care organizations engaged in community-level activities with multiple CBOs which required more expansive, ongoing leadership-level partnerships. Administrators highlighted 4 recommendations for collaborating with CBOs: (1) engage early; (2) establish shared purpose for the collaboration; (3) determine who is best suited to lead activities; and (4) avoid making assumptions about partner organizations.

Conclusions
Health care organizations tailored the intensity of their relationships with CBOs based on their goals. Administrators viewed informal relationships with limited interactions between organizations sufficient for many activities. Our study offers key insights into how and when health care organizations may want to develop partnerships with CBOs.
Essential not Supplemental: Medicare Advantage Members’ Use of Non-Emergency Medical Transportation (NEMT)
Authors: Razon Na’amah , Gottlieb Laura M. , Fraze Taressa 
Published: July 2023

Abstract
Background
Over five million people in the USA miss or delay medical care because of a lack of transportation. Transportation barriers are especially relevant to Medicare Advantage (MA) health plan enrollees, who are more likely to live with multiple chronic conditions and experience mobility challenges. Non-Emergency Medical Transportation (NEMT) helps to address transportation gaps by providing rides to and from routine medical care (for example, medical appointments, laboratory tests, and pharmacy visits) and has been added as a supplemental benefit to some MA health plans.

Objective
We aimed to characterize MA enrollees’ experiences with supplemental NEMT benefits.

Design
Qualitative interviews focused on participants’ experiences with existing NEMT benefits, transportation, and mobility.

Participants
Twenty-one MA enrollees who used their MA NEMT benefit in 2019 and who remained eligible for ongoing transportation benefits through 2021.

Approach
Using purposive sampling from a list of eligible participants, we recruited individuals who used their MA NEMT benefit in 2019 and who remained eligible for benefit-covered transportation services through 2021.

Key Results
Participants considered NEMT an essential service, particularly because these services helped them decrease social isolation, reduce financial insecurity, and manage their own medical needs. Navigating logistical challenges associated with arranging NEMT services required participants to commit considerable time and energy and limited the effectiveness and reliability of NEMT.

Conclusion
Participants described NEMT as a valued service essential to their ability to access health care. They suggested ways to increase service flexibility and reliability that could inform future NEMT policy and practice. As health systems and payers learn how to best address social risks, particularly as the US population ages, our findings underscore the importance of NEMT services and highlight opportunities to advance comprehensive transportation solutions for MA participants.
Key ecological determinants of the reproductive success and conservation strategy of Delphinium pentagynum subsp. formenteranum (Ranunculaceae), an endangered endemic species of the western Mediterranean Basin (Balearic Islands)
Authors: Llorens Leonardo , Cerrato Marcello D. , Cortés-Fernández Iván , Gil Lorenzo 
Published: July 2023

AbstractDelphinium pentagynum subsp. formenteranum is an endemic species restricted to the island of Formentera (Balearic Islands), where it is considered an endangered species. Ecological traits such as pollination and pollinator-plant interaction, and seed germination are key processes required for conservation efforts but remain poorly characterized. Floral traits were evaluated analysing total alkaloid content for vegetative plant, floral, nectar and pollen, and volatile emitted by flowers. Flowering phenology was assessed in the field in three different years (1998, 2008, 2018) and under cultivated conditions for D. pentagynum subsp. formenteranum and cohabiting species. Germination trials were conducted both at different constant and alternate temperatures, and seed lots conserved at room temperature were germinated across 7 years to assess seed viability with seed age. Micromorphological seed traits were assessed with scanning electron microscopy. Results show intraspecific flowering synchrony for D. pentagynum subsp. formenteranum with flowering occurring in May after the flowering peak of cohabiting species. Floral traits show lack of odor related volatiles and high alkaloid content in plant and flowers. Germination remains unaffected within a broad spectrum of temperatures and is only negatively affected at high temperatures (23ºC). Seed viability maintains high germination rates for the first 2 years (~ 100%) and decreases after four-five years (40–60%) and six years (20%), being non-viable after seven years. Both phenological displacement and alkaloid content in flowers support pollination specificity, which is restricted almost exclusively to Anthophora balearica. Germination ecology is dependent mainly on water availability, but high seed longevity allows probable transient bank seed.
Brain-Derived Neurotrophic Factor rs6265 polymorphism is associated with severe cancer-related fatigue and neuropathic pain in female cancer survivors
Authors: Goto Taichi , Von Ah Diane , Li Xiaobai , Xiang Lichen , Kwiat Catherine , Nguyen Christopher , Hsiao Chao-Pin , Saligan Leorey N. 
Published: July 2023

Abstract

Purpose
This study examined the relationships between a single-nucleotide polymorphism (SNP) of brain-derived neurotrophic factor (BDNF) rs6265 and psychoneurological (PN) symptoms in female cancer survivors.

Methods
This secondary analysis examined 393 study participants. In addition to demographic variables, self-reported PN symptom scores (anxiety, bodily pain, depression, fatigue, neuropathic pain, and sleep disturbance) were collected using the Patient-Reported Outcomes Measurement Information System and 36-Item Short-Form Health Survey. Buccal swab samples were collected to obtain genotypes for BDNF rs6265 (Val/Val, Val/Met, or Met/Met). The PN symptom scores were compared across genotypes, and the relationships were examined using a regression model. We also explored correlations between different symptoms within each genotype.

Results
Participants with the Met/Met genotype reported significantly worse cancer-related fatigue and neuropathic pain, which was confirmed by rank-based regression analysis. In addition, cancer-related fatigue was correlated with other PN symptoms, particularly depression. These correlations were stronger in study participants with the Met/Met genotype than those with other genotypes.

Conclusion
Our study suggests that female cancer survivors with the Met/Met genotype of BDNF rs6265 are likely to experience worse cancer-related fatigue and neuropathic pain and that cancer-related fatigue is a good predictor of co-occurring PN symptoms in this population.

Implications for Cancer Survivors
Our findings advance the scientific community's understanding of cancer-related PN symptoms experienced by female cancer survivors, especially the unique role of BDNF rs6265 polymorphism in these symptoms. Our findings offer valuable insights for clinical practice that the symptom experience among female cancer survivors may vary based on BDNF genotypes.
New Exact Wave Solutions on the Complex Ginzburg–Landau Equation with Extended Rational Sin–Cos and Sinh–Cosh Method
Authors: Yang Fei , Lin Yuanjian 
Published: July 2023

AbstractIn this paper, a new complex waves representing solutions of the complex Ginzburg–Landau equation with Kerr law nonlinearity is investigated. we used the extended rational sin–cos and sinh–cosh function methods construct precise solutions to the nonlinear equation. Bright periodic solution, periodic solution, dark wave soliton solution of phenomena that occur in nonlinear optics or in plasma physics are obtained. The physical meaning of the geometrical structures for some solutions is discussed for different choices of the free parameters. The proposed method provides an important and effective mathematical tool to construct exact solutions according to different complex equations. The results present the dynamics properties of the different waves with different the 3D and contour plots.
Resonance Soliton, Breather and Interaction Solutions of the Modified Kadomtsev–Petviashvili-II Equation
Authors: Zhang Xueqing , Ren Bo 
Published: July 2023

AbstractIn this paper, we investigate the modified Kadomtsev–Petviashvili-II (mKP-II) equation, which has important applications in fluid dynamics, plasma physics and electrodynamics. By utilizing the Hirota bilinear method, the N-soliton solutions of the mKP-II equation are obtained. The resonance Y-type soliton, and the interaction between M-resonance Y-type solitons and P-resonance Y-type solitons are constructed by imposing some constraints to the parameters of the N-soliton solutions. Moreover, the novel type of double opening resonance Y-type soliton solutions are obtained by selecting some appropriate parameters in 3-soliton solutions. By making some conjugate assumptions in the parameters, the multiple breathers are presented. Furthermore, the hybrid solutions consisting of multiple breathers and resonance Y-type solitons are investigated. The dynamics of these hybrid solutions are analyzed using both numerical simulations and graphical methods.
Residential social vulnerability among healthcare personnel with and without severe acute respiratory coronavirus virus 2 (SARS-CoV-2) infection in Five US states, May–December 2020
Authors: Zlotorzynska Maria , Chea Nora , Eure Taniece , Alkis Ramirez Rebecca , Blazek Gregory T. , Czaja Christopher A. , Johnston Helen , Barter Devra , Kellogg Melissa , Emanuel Catherine , Lynfield Ruth , Fell Ashley , Lim Sarah , Lovett Sara , Phipps Erin C. , Shrum Davis Sarah , Sievers Marla , Dumyati Ghinwa , Concannon Cathleen , Myers Christopher , McCullough Kathryn , Woods Amy , Hurley Christine , Licherdell Erin , Pierce Rebecca , Ocampo Valerie L.S. , Hall Eric , Magill Shelley S. , Grigg Cheri T. 
Published: July 2023

AbstractObjective:To characterize residential social vulnerability among healthcare personnel (HCP) and evaluate its association with severe acute respiratory coronavirus virus 2 (SARS-CoV-2) infection.Design:Case–control study.Setting:This study analyzed data collected in May–December 2020 through sentinel and population-based surveillance in healthcare facilities in Colorado, Minnesota, New Mexico, New York, and Oregon.Participants:Data from 2,168 HCP (1,571 cases and 597 controls from the same facilities) were analyzed.Methods:HCP residential addresses were linked to the social vulnerability index (SVI) at the census tract level, which represents a ranking of community vulnerability to emergencies based on 15 US Census variables. The primary outcome was SARS-CoV-2 infection, confirmed by positive antigen or real-time reverse-transcriptase– polymerase chain reaction (RT-PCR) test on nasopharyngeal swab. Significant differences by SVI in participant characteristics were assessed using the Fisher exact test. Adjusted odds ratios (aOR) with 95% confidence intervals (CIs) for associations between case status and SVI, controlling for HCP role and patient care activities, were estimated using logistic regression.Results:Significantly higher proportions of certified nursing assistants (48.0%) and medical assistants (44.1%) resided in high SVI census tracts, compared to registered nurses (15.9%) and physicians (11.6%). HCP cases were more likely than controls to live in high SVI census tracts (aOR, 1.76; 95% CI, 1.37–2.26).Conclusions:These findings suggest that residing in more socially vulnerable census tracts may be associated with SARS-CoV-2 infection risk among HCP and that residential vulnerability differs by HCP role. Efforts to safeguard the US healthcare workforce and advance health equity should address the social determinants that drive racial, ethnic, and socioeconomic health disparities.
Music teaching in primary schools of Albacete, Spain, during the COVID-19 pandemic
Authors: Bravo Marín Raquel , López García Narciso José , Mateo Gómez Alonso 
Published: July 2023

AbstractThe role, functions and duties of teachers have dramatically changed with the COVID-19 pandemic. This sudden change has posed enormous challenges for schools, students and teachers. This article deals with the situation of music teaching in the Spanish province of Albacete (Castilla-La Mancha)1 in the first two terms of the course 2020–2021 through face-to-face lessons. A questionnaire, created on music teaching in elementary schools, was answered by 96 teachers, teaching an amount of 35,365 primary education pupils in Albacete. The results of this research show that the everyday teaching has experienced relevant changes, especially in instrumental practice.
Identification of post-COVID-19 condition phenotypes, and differences in health-related quality of life and healthcare use: a cluster analysis
Authors: Gerritzen Iris , Brus Iris M. , Spronk Inge , Biere-Rafi Sara , Polinder Suzanne , Haagsma Juanita A. 
Published: July 2023

Abstract
The aim of this cross-sectional study was to identify post-COVID-19 condition (PCC) phenotypes and to investigate the health-related quality of life (HRQoL) and healthcare use per phenotype. We administered a questionnaire to a cohort of PCC patients that included items on socio-demographics, medical characteristics, health symptoms, healthcare use, and the EQ-5D-5L. A principal component analysis (PCA) of PCC symptoms was performed to identify symptom patterns. K-means clustering was used to identify phenotypes. In total, 8630 participants completed the survey. The median number of symptoms was 18, with the top 3 being fatigue, concentration problems, and decreased physical condition. Eight symptom patterns and three phenotypes were identified. Phenotype 1 comprised participants with a lower-than-average number of symptoms, phenotype 2 with an average number of symptoms, and phenotype 3 with a higher-than-average number of symptoms. Compared to participants in phenotypes 1 and 2, those in phenotype 3 consulted significantly more healthcare providers (median 4, 6, and 7, respectively, p < 0.001) and had a significantly worse HRQoL (p < 0.001). In conclusion, number of symptoms rather than type of symptom was the driver in the identification of PCC phenotypes. Experiencing a higher number of symptoms is associated with a lower HRQoL and more healthcare use.
Cardiac magnetic resonance predictors for successful primary biventricular repair of unbalanced complete common atrioventricular canal
Authors: Jones Andrea L. , White Brian R. , Ghosh Reena M. , Mondal Antara , Ampah Steve , Ho Deborah Y. , Whitehead Kevin , Harris Matthew A. , Biko David M. , Partington Sara , Fuller Stephanie , Cohen Meryl S. , Fogel Mark A. 
Published: July 2023

AbstractBackground:Patients with unbalanced common atrioventricular canal can be difficult to manage. Surgical planning often depends on pre-operative echocardiographic measurements. We aimed to determine the added utility of cardiac MRI in predicting successful biventricular repair in common atrioventricular canal.Methods:We conducted a retrospective cohort study of children with common atrioventricular canal who underwent MRI prior to repair. Associations between MRI and echocardiographic measures and surgical outcome were tested using logistic regression, and models were compared using area under the receiver operator characteristic curve.Results:We included 28 patients (median age at MRI: 5.2 months). The optimal MRI model included the novel end-diastolic volume index (using the ratio of left ventricular end-diastolic volume to total end-diastolic volume) and the left ventricle–right ventricle angle in diastole (area under the curve 0.83, p = 0.041). End-diastolic volume index ≤ 0.18 and left ventricle–right ventricle angle in diastole ≤ 72° yield a sensitivity of 83% and specificity of 81% for successful biventricular repair. The optimal multimodality model included the end-diastolic volume index and the echocardiographic atrioventricular valve index with an area under the curve of 0.87 (p = 0.026).Conclusions:Cardiac MRI can successfully predict successful biventricular repair in patients with unbalanced common atrioventricular canal utilising the end-diastolic volume index alone or in combination with the MRI left ventricle–right ventricle angle in diastole or the echocardiographic atrioventricular valve index. A prospective cardiac MRI study is warranted to better define the multimodality characteristic predictive of successful biventricular surgery.