bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mobile Apps, Trading Behaviors, and Portfolio Performance: Evidence from a Quasi-Experiment in China
Authors: Liu Che-Wei , Mithas Sunil , Pan Yang , Hsieh J. J. Po-An 
Published: July 2024

Mobile Apps, Trading Behaviors, and Portfolio Performance: Evidence from a Quasi-Experiment in China How do mobile apps influence individual investors’ financial decisions and performance? This study answers this timely and important question by using rare archival data from a large securities company in China using a sample of 20,665 investors. Authors find that mobile app adoption does not affect investors’ portfolio performance when one examines aggregate impacts using a binary indicator of mobile app use. Their additional analyses suggest that adopting mobile apps results in a noticeable decrease in time constraints, a proxy for transaction friction, and a modest increase in trend-chasing bias, reflecting tendencies toward myopic decision making. Because the reduction in time constraints can benefit investors’ performance, the increase in trend chasing can be detrimental to investors’ performance, these findings explain why mobile app adoption has no overall effect on portfolio performance. Further analyses of adopters’ postadoption behaviors provide interesting insights and show that the mobile app usage intensity has an inverted U–shaped relationship with portfolio performance. The results are robust to using different samples or excluding high market volatility periods and by using a variety of methods, such as propensity score matching, dynamic matching, stacked difference-in-differences, or an instrumental variable approach.
Sciurus alleni and Otospermophilus variegatus winter activity in Nuevo León, México
Authors: Mercado-Morales David 
Published: July 2024

La disponibilidad de agua y alimento durante el invierno es esencial para la supervivencia de ardillas no hibernantes en bosques templados; las ardillas arbóreas y terrestres tienen diferentes estrategias para sobrevivir en invierno. Esta nota reporta la actividad y comportamiento de Sciurus alleni y Otospermophilus variegatus a nivel del suelo durante el invierno. Usando cámaras trampa, en un ojo de agua y en un paso de fauna, en un bosque de nogal encarcelado (Juglans mollis), la actividad y comportamiento de ambas ardillas fue registrada; además, por observación directa se analizó la búsqueda, almacenaje y dispersión de nueces. El patrón de actividad invernal de S. alleni es bimodal largo en ambos sitios y para O. variegatus es según el hábitat del sitio de unimodal corto a multimodal. Sciurus alleni almacena nueces en forma dispersa. El tipo de comportamiento es situacional según el sitio de observación, bebiendo en el ojo de agua o tránsito en el paso de fauna. La presencia del chichimoco Neotamias solivagus también fue registrada confirmando su actividad durante el invierno. Sciurus alleni es activa todo el invierno aún en temperaturas congelantes y en el crepúsculo, a diferencia de O. variegatus que presentó cortos períodos de actividad, mostrando que ambas ardillas tienen diferentes estrategias para evitar traslape de nicho. Estos resultados revelan la importancia de las fuentes de agua y los nogales silvestres para la supervivencia de S. alleni y O. variegatus en la temporada fría y seca de invierno en bosques del Parque Nacional Cumbres de Monterrey.
Mamíferos medianos y grandes en un fragmento de bosque subandino en Colombia
Authors: Mopán-Chilito Alex Mauricio , Camacho J. Alejandro , Franco-Pérez Estefanía , Grajales-Hernández O. Eduardo , Link Andrés , Montilla Sebastián O. 
Published: July 2024

Los fragmentos de bosques que aún persisten dentro de los ambientes antropizados, juegan un papel fundamental en la conservación de diferentes especies de animales. Diferentes organismos, usan los fragmentos de bosque como hábitats permanentes o como corredores de paso dentro de los agropaisajes. El objetivo de este estudio es reportar los mamíferos medianos y grandes en un fragmento de bosque del centro de Colombia. Este estudio se realizó en un fragmento de bosque de 6 ha ubicado en la finca El Billar, en el municipio de Pijao, Quindío, Colombia. Para la detección de los mamíferos se utilizó la metodología de fototrampeo, observaciones directas a partir de recorridos (nocturnos y diurnos) y encuestas realizadas a los habitantes locales sobre la mastofauna local percibida. El periodo de muestreo comprendió entre agosto de 2018 hasta junio de 2021. Registramos 15 especies de mamíferos medianos y grandes, agrupadas en 12 familias pertenecientes a 6 órdenes, siendo Carnivora y Didelphimorphia los mejor representados, con 6 y 3 especies, respectivamente. Especies de particular interés por su estado de amenaza y rasgos ecológicos como Aotus lemurinus y Leopardus tigrinus, persisten en este fragmento de bosque a pesar de su reducido tamaño. Estos registros resaltan el papel que cumplen los pequeños remanentes de bosque en la conservación de las especies y la importancia de generar estrategias de conectividad entre ecosistemas altamente antropizados.
Exploring new sites: the neotropical otter (Lontra longicaudis annectens) in Bahía del Tóbari, Sonora, México
Authors: Leyva-García Germán , Gallo-Reynoso Juan Pablo , Barba-Acuña Isai David 
Published: July 2024

La nutria neotropical (Lontra longicaudis annectens) tiene una amplia distribución en México, la especie habita en ríos, lagunas, esteros, humedales y bahías. Desde bosques de pino-encino, bosques mesófilos de montaña subtropicales hasta manglares, y desde los 2,617 m hasta el nivel del mar. El objetivo del estudio fue reportar la presencia de nutrias neotropicales en un medio ambiente salobre, incluyendo islotes artificiales o tarquinas para alimentarse y descansar. Se encontraron rastros de nutria neotropical mientras se hacían conteos de aves y la estimación de la anidación de aves marinas y playeras, en los canales y playas de la Bahía del Tóbari, Sonora. Encontramos rastros de nutria en una isleta o tarquina en la Bahía de El Tóbari, Sonora. Los habitantes de la zona nos mostraron un esqueleto con piel seca casi completo de una nutria neotropical encontrado en una playa cercana a la localidad. Completamos el estudio con algunos registros previos no publicados de la nutria neotropical cercanos a la localidad. Estos islotes artificiales o tarquinas proveen a las nutrias presas disponibles, ya que las nutrias depredan sobre una variedad de aves acuáticas, además de que estas estructuras proveen lugares de descanso a las nutrias. Al usar hábitats de aguas salobres, las nutrias muestran la plasticidad de la especie para explorar nuevos sitios y obtener fuentes alternas de alimentos.
A morphologically atypical great fruit-eating bat Artibeus lituratus from Paraguay
Authors: Vrla Sarah C. , Winnett Morgan E. , Stevens Richard D. 
Published: July 2024

Las anormalidades morfológicas y sus causas subyacentes están ampliamente conocidas y documentadas en humanos y animales domésticos; sin embargo, no se reportan frecuentemente en poblaciones silvestres. Este fenómeno se debe a que muchas anormalidades conducen a la muerte temprana del individuo y generalmente solo se las observa cuando se colecta un gran número de especímenes. Aquí reportamos una hembra adulta del murciélago frutero Artibeus lituratus (Chiroptera, Phyllostomidae) de Paraguay con anormalidades craneales y post-craneales notorias. Los especímenes, incluyendo al individuo atípico de A. lituratus, fueron preparados como ejemplares científicos de piel y cráneo, y depositados en el Natural Science Research Laboratory de la Universidad de Texas Tech. Las secuencias de Citocromo b (Cyt b) fueron cargadas en BLAST para la identificación de la especie. Comparamos cuantitativamente al individuo atípico con otras 15 hembras normales colectadas en la misma localidad usando 13 medidas alares y 13 craneales. La secuencia del Cyt b del espécimen atípico obtuvo 100 % de coincidencia con A. lituratus. El ejemplar atípico fue de tamaño menor en las medidas convencionales del cuerpo y morfología de alas. El cráneo fue más pequeño y menos robusto comparado con otras hembras de A. lituratus del mismo sitio. Los huesos mastoideos y las crestas sagitales fueron notablemente reducidos y el escudo frontal estuvo ausente en el individuo atípico. Recomendamos que las anormalidades morfológicas se reporten con mayor frecuencia ya que la obtención de la tasa de anormalidad puede indicar el estado de salud poblacional.
Mother’s defense of a juvenile rock squirrel (Otospermophilus variegatus) against a rattlesnake (Crotalus molossus)
Authors: González-Jaramillo urya Ivonne , Lozano-Amaro Ileana , Glebskiy Yury , Cano-Santana Zenón 
Published: July 2024

La depredación de ardillones de roca (Otospermophilus variegatus) por serpientes de cascabel (Crotalus sp.) ha llevado a un proceso coevolutivo durante el cual los ardillones han desarrollado resistencia al veneno de serpiente de cascabel y una serie de comportamientos complejos que les permiten protegerse contra la depredación. En esta nota describimos una observación de tal comportamiento; cómo una madre ardillón protege a un joven contra el ataque de una serpiente de cascabel. Fuimos testigos de un enfrentamiento entre una madre ardillón y una serpiente de cascabel por un juvenil que fue atacado por la serpiente, y la estrategia utilizada para guiar a su cría lejos del peligro. La madre ardillón amenazó a la serpiente de cascabel moviendo su cola y se retiró lateralmente a un árbol cercano. El juvenil siguió a la madre guiado por su olor. Cuando llegaron a una distancia segura, saltaron del árbol y se alejaron manteniendo la distancia. Antes de retirarse, la madre intentó interactuar con los observadores. Trabajadores locales confirman que las ardillas les advierten sobre la presencia de serpientes de cascabel. El comportamiento defensivo que observamos fue complejo y efectivo. La madre pudo guiar al joven ardillón fuera del peligro, y la estrategia estuvo bien planeada, ya que se retiraron a un árbol cercano donde la serpiente de cascabel estaría en desventaja. Se concluye que los ardillones de roca tienen un comportamiento bien desarrollado para proteger a sus crías contra los ataques de serpientes.
A brown recluse spider bite wound: a case report and literature review
Authors: Fang Lauren , Chen Joanna , Spurgeon-Hess Taylor , Thompson Noelle , Simman Richard 
Published: July 2024

The aim of this case report is to highlight an uncommon diagnosis for necrotic wounds. Brown recluse spider bites are a challenging clinical diagnosis and need to be considered as part of differential diagnoses, especially with the spider's natural distribution altering due to the effects of climate change. We present a case of a 44-year-old female patient who developed systemic symptoms and wound necrosis from a presumed brown recluse spider bite. The patient had multiple risk factors for poor wound healing and necrotic skin infections. It is important to be able to recognise unique manifestations of this rare diagnosis in order to avoid delay of timely and effective intervention and treatment. Declaration of interest: The authors have no conflicts of interest.
Comprehensive device modeling and a performance analysis of perovskite-silicon tandem solar cells through light management
Authors: Pan Zhao-Yao , Chen Hai-Tao , Yang Jin-Peng 
Published: July 2024

Currently, researchers are paying much attention to perovskite-silicon tandem solar cells due to their great potential to surpass the Shockley–Queisser limit of single silicon solar cells. In order to improve the performance of perovskite-silicon tandem solar cells, various techniques have been employed, including selecting textured structures or optimizing the film thickness in the top perovskite cells. However, despite these efforts, significant losses due to surface reflection and unbalanced light absorption still exist, and the accurate predictions combining both optical and electric calculations towards obtaining higher power conversion efficiency (PCE) are still lacking. In this study, we integrated optical and electrical numerical simulations to precisely investigate the effectiveness of using a pyramidal perovskite (MAPbI3) nanostructured film as an example in perovskite-silicon tandem solar cells to reduce the reflective losses and balance the current densities. Through our calculations, the PCE of tandem solar cells can be improved from 23.1% (the planar structures without texturing) to 29.3% in the best-performing textured tandem devices (with a period of 300 nm and peak-to-valley height of 300 nm) under the consistently calculated absorbed and EQE spectrum. Direct comparisons between calculated results and experimental data could also reveal the influence ascribed to a detailed factor that hinders the PCE improvement. These findings offer valuable theoretical insights for the advancement and optimization of perovskite-silicon tandem solar cells.
Diabetes mellitus in sub-saharan Africa during the COVID-19 pandemic: A scoping review
Authors: Sseguya Wenceslaus , Bahendeka Silver , MacLennan Sara , Mody Nimesh , Guntupalli Aravinda Meera 
Published: July 2024

Background
The COVID-19 pandemic impacted the healthcare and outcomes of individuals with various chronic diseases. However, there is a paucity of data on the impact of the COVID-19 pandemic on diabetes mellitus (DM) in low-resource settings. To address this, we conducted a scoping review to explore the literature published on diabetes-related COVID-19 outcomes and care during the COVID-19 pandemic in countries of sub-Saharan Africa.

Methods
We applied our search strategy to PubMed, Web of Science, CINAHL, African Index Medicus, Google Scholar, Cochrane Library, Scopus, Science Direct, ERIC and Embase to obtain relevant articles published from January 2020 to March 2023. Two independent reviewers were involved in screening the retrieved articles. Data from eligible articles were extracted from quantitative, qualitative and mixed-methods studies. Quantitative evidence was summarised using descriptive statistics, while a thematic framework was used to identify and categorise themes from qualitative evidence.

Results
We found 42 of the retrieved 360 articles eligible, mainly from South Africa, Ethiopia and Ghana (73.4%). The incidence of DM among COVID-19 cases was 13.7/1,000 person-days observation. COVID-19 was associated with increased odds of death (OR 1.30–9.0, 95% CI), hospitalisation (OR 3.30–3.73: 95% CI), and severity (OR: 1.30–4.05, 95% CI) in persons with DM. Challenges in caring for DM during the pandemic were inadequate patient self-management, difficulties in healthcare access, and inadequate healthcare resources.

Conclusion
The COVID-19 pandemic was characterised by a high incidence of DM in persons infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and high COVID-19-associated mortality, severity, and hospitalisation among people persons with DM. The pandemic also created difficulties in DM self-management and worsened the quality of DM care services. Policymakers should devise preventive and management strategies for DM during emerging and re-emerging infectious disease epidemics and outbreaks, given that such occurrences are increasingly frequent in the region.
Acute Pouchitis is Common in Pregnant and Postpartum Women
Authors: Kayal Maia , Gottlieb Zoe , Glamour Benita , Ibing Susanne , Spencer Elizabeth , Dubinsky Marla C. 
Published: July 2024

INTRODUCTION:
The impact of pregnancy on the development of pouchitis in women who have undergone total proctocolectomy with ileal pouch anal anastomosis for ulcerative colitis is poorly understood.

METHODS:
This was a retrospective study of women with ulcerative colitis who underwent total proctocolectomy with ileal pouch anal anastomosis and subsequently became pregnant at Mount Sinai Hospital. The primary outcome was acute pouchitis during pregnancy or the postpartum period defined as symptoms of increased stool frequency and urgency treated with antibiotics.

RESULTS:
A total of 44 women with 63 pregnancies and complete data were identified. Acute pouchitis occurred in 14 pregnancies (22.2%) in 12 women and in the postpartum period of 10 pregnancies (15.9%) in 9 women. Acute pouchitis occurred more frequently in women with a history of acute pouchitis immediately before, during, or after pregnancy.

DISCUSSION:
Acute pouchitis was common during pregnancy and the postpartum period, likely due to microbial shifts. Although not statistically significant, these results provide insight into the impact of pregnancy on the risk of pouchitis and establish the framework for preconception counseling that focuses on prevention and management of pouchitis during pregnancy.
24-Hour Urinary Sodium Excretion Is Associated With Increased Risk of Pancreatic Cancer: A Prospective Cohort Study
Authors: Wang Jiayi , Liao Yangjie , Deng Minzi , Wu Xing , Wang Xiaoyan , Li Jingbo 
Published: July 2024

INTRODUCTION:
This study builds on previous research and its limitations, which indicate the need for further investigation in prospective cohorts. Our aim was to explore the association between estimated 24-hour urinary sodium excretion (indicative of daily sodium consumption) and the occurrence of pancreatic cancer in the UK Biobank's large prospective cohort.

METHODS:
Using the INTERSALT equation, the study computed estimated 24-hour urinary sodium excretion by analyzing the baseline spot urine sodium measurements of 434,372 individuals enrolled in the UK Biobank. Pancreatic cancer cases were identified through UK cancer registries. Adjusted Cox proportional hazards models were used to evaluate hazard ratios (HRs) and 95% confidence intervals (CIs) for the association between estimated 24-hour urinary sodium excretion and the risk of pancreatic cancer.

RESULTS:
Over a median follow-up period of 13.8 years, 1,765 cases of pancreatic cancer were detected. The multivariable adjusted Cox model showed that each 1-gram rise in estimated 24-hour urinary sodium excretion corresponded to a 1.12 HR for incident pancreatic cancer (95% CI: 1.03, 1.22). The estimated HR for 24-hour urinary sodium excretion in binary form was 1.23 (95% CI: 1.05, 1.44). Compared with the lowest group, the group with the highest estimated 24-hour urinary sodium excretion exhibited an HR of 1.38 (95% CI: 1.21, 1.58).

DISCUSSION:
These results propose an association between elevated sodium consumption and a heightened risk of pancreatic cancer. Further validation and exploration of potential mechanisms are warranted.
Predicting Response to Neuromodulators or Prokinetics in Patients With Suspected Gastroparesis Using Machine Learning: The “BMI, Infectious Prodrome, Delayed GES, and No Diabetes” Model
Authors: Takakura Will , Surjanhata Brian , Nguyen Linda Anh Bui , Parkman Henry P. , Rao Satish S.C. , McCallum Richard W. , Schulman Michael , Wo John Man-Ho , Sarosiek Irene , Moshiree Baha , Kuo Braden , Hasler William L. , Lee Allen A. 
Published: July 2024

INTRODUCTION:
Pharmacologic therapies for symptoms of gastroparesis (GP) have limited efficacy, and it is difficult to predict which patients will respond. In this study, we implemented a machine learning model to predict the response to prokinetics and/or neuromodulators in patients with GP-like symptoms.

METHODS:
Subjects with suspected GP underwent simultaneous gastric emptying scintigraphy (GES) and wireless motility capsule and were followed for 6 months. Subjects were included if they were started on neuromodulators and/or prokinetics. Subjects were considered responders if their GP Cardinal Symptom Index at 6 months decreased by ≥1 from baseline. A machine learning model was trained using lasso regression, ridge regression, or random forest. Five-fold cross-validation was used to train the models, and the area under the receiver operator characteristic curve (AUC-ROC) was calculated using the test set.

RESULTS:
Of the 150 patients enrolled, 123 patients received either a prokinetic and/or a neuromodulator. Of the 123, 45 were considered responders and 78 were nonresponders. A ridge regression model with the variables, such as body mass index, infectious prodrome, delayed gastric emptying scintigraphy, no diabetes, had the highest AUC-ROC of 0.72. The model performed well for subjects on prokinetics without neuromodulators (AUC-ROC of 0.83) but poorly for those on neuromodulators without prokinetics. A separate model with gastric emptying time, duodenal motility index, no diabetes, and functional dyspepsia performed better (AUC-ROC of 0.75).

DISCUSSION:
This machine learning model has an acceptable accuracy in predicting those who will respond to neuromodulators and/or prokinetics. If validated, our model provides valuable data in predicting treatment outcomes in patients with GP-like symptoms.
Investigation and numerical simulation study on the vertical bearing mechanism of large-diameter overlength piles in water-enriched soft soil areas
Authors: Liang Huayan , Wang Zhi , Zhao Biao , Xu Yan , Li Zheng , Ding Xuanming 
Published: July 2024

Abstract
With the development of urbanization, there is an increasing demand for higher land utilization rates, leading to the emergence of high-rise residential and commercial complexes. Additionally, in coastal areas, the presence of soft soil and low bearing capacity of the foundation necessitate higher foundation bearing capacity. Large-diameter, super-long piles have been widely employed in engineering projects to address these challenges effectively. This study analyzes their vertical bearing characteristics through field load tests and determines vertical load distribution and transfer mechanisms by using Brillouin Optical Time Domain Reflectometry. A numerical computation and analysis method based on PLAXIS 3D was established, examining the effects of parameters such as pile diameter, length, and soil modulus on the vertical bearing characteristics. Results indicate that large-diameter, super-long piles mainly bear loads through side friction, with the tip bearing less load. As load levels increase, axial force increases linearly above 40 m depth and becomes nonlinear below. Frictional resistance is significant below 40 m at 3,700 kN load. Parameter analysis shows that increasing pile length and diameter enhances bearing capacity, suggesting this method to improve pile foundation capacity in engineering.
Performance repair of building materials using alumina and silica composite nanomaterials with electrodynamic properties
Authors: Ni Dingyu , Lu Shengliang , Cai Feng 
Published: July 2024

Abstract
In recent years, the service life of building materials has become the focus of attention. Among them, the service life of concrete and steel bars is particularly affected by the corrosion of external ions (such as Cl−) in the environment. To solve this problem, a new type of composite nanocolloid was prepared through a controllable preparation method. The composite nanocolloid is prepared from aluminum chloride sol and silica sol as raw materials. The prepared colloidal particles have a particle size distribution between 10.5 and 17.5 nm, exhibiting excellent stability and dispersibility. In order to verify the improvement effect of the composite nanocolloid on the properties of building materials, the influence of it on the porosity of concrete and the anti-corrosion performance of steel bars was experimentally studied. The results indicate that the moisture absorption and dehumidification speed of concrete treated with composite nano colloids is slower, and the pore size distribution is mainly concentrated in 100–1,000 nm, indicating that the colloids can effectively optimize the pore structure of concrete. In addition, the processed steel plate samples showed high AC impedance values and low corrosion current logarithmic values in electrochemical testing, indicating that composite nanocolloids have a significant protective effect on the corrosion of steel bars, which can effectively improve the performance of building materials and extend their service life.