bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prevalence and Demographic Characteristics of Prostate Cancer Patients in Colombia: data from the National Health Registry from 2015 to 2019
Authors: Parra-Medina Rafael , Barahona-Correa Julian , Chaves Juan Jose , Páyan-Gomez César , Ramirez-Clavijo Sandra , Fenández-Ávila Daniel G. , Rosselli Diego 
Published: September 2021

AbstractBackground and Objective Prostate cancer is a multifactorial disease and is among the top five causes of death in men worldwide. The Colombian Ministry of Health has adopted the Integrated Information System on Social Protection (Sistema Integrado de Información de la Protección Social, SISPRO, by its Spanish acronym) registry to collect comprehensive information from the Colombian health system. The system provides close to universal coverage (around 95%). We aimed to establish the prevalence of prostate cancer in Colombia and to describe its demographics, based on data provided by SISPRO, openly available for scientific analysis.Methods Using the SISPRO data from 2015 through 2019, we analyzed the prevalence and demographic characteristics of patients diagnosed with prostate cancer.Results We identified a total of 43,862 patients with prostate cancer in the 5-year period and estimated a prevalence of 4.54 cases per 1,000 habitants, using as denominator males over 35 years old. We calculated a prevalence of early-onset prostate cancer (i.e., 35–54 years) of 0.14 per 1,000 habitants (791 cases in 5 years). The highest prevalence was observed in patients > 80 years (33.45 per 1,000 habitants). The departments with the highest prevalence were Bogotá, Valle del Cauca, Risaralda, and Boyacá, and the region with the lowest prevalence was Amazonas.Conclusion We describe the prevalence and demographics of prostate cancer in Colombia using the national healthcare system database. We observed that the prevalence has been increasing over time, and the distribution is variable according to regions, which may be related to racial or environmental causes, or access to the urologist. These factors should be addressed in further studies.
Participación en investigación durante la formación en Traumatología y Ortopedia en Chile ¿Con qué frecuencia publican los residentes?
Authors: Cabrolier Jorge , Gomez Carlos , Guiloff Rodrigo , Leyton Martin , Figueroa David 
Published: September 2021

Resumen
Objetivo Determinar el promedio de artículos indexados publicados por residentes de traumatología en Chile y, en segundo lugar, establecer si el tiempo protegido para investigación se asociaba con un mayor número de publicaciones.
Métodos Se desarrolló un estudio descriptivo transversal. Se realizó una búsqueda en la base de datos de PubMed para identificar publicaciones escritas por residentes egresados de programas chilenos entre 2012 y 2016. Se incluyeron artículos con fecha de publicación entre 6 meses después del inicio de su residencia y 12 meses después de la graduación. Se excluyeron las cartas al editor, los artículos no relacionados con la cirugía ortopédica, y los proyectos de investigación con una afiliación institucional distinta a sus programas de formación. Cada currículo de los programas de residencia fue revisado para que se identificara la mención de tiempo protegido para investigación.
Resultados Se incluyó a un total de 272 residentes de 10 programas, y 72 artículos cumplieron los criterios de selección. La tasa de publicación promedio fue de 0,26 ± 1,13 artículos (rango: 0 a 13 artículos) por residente durante su formación. En total, 2 programas tuvieron una tasa de publicación promedio superior a 1, y un 89,4% de los residentes chilenos no publicó ningún artículo durante su formación. Ninguno de los programas especificó tiempo protegido para la investigación.
Conclusiones A nuestro entender, este es el primer estudio que describe el estado actual de la participación en la investigación entre los residentes de traumatología chilenos. El número promedio de publicaciones indexadas en PubMed por residente durante la formación en Chile fue de 0.26 ± 1.13 artículos. Sólo el 10% de los residentes publica un artículo durante su residencia. No se pudo establecer una correlación entre el tiempo protegido para la investigación y el número de publicaciones.
Manejo actual de las metástasis vertebrales: un trabajo en equipo
Authors: Silva Alvaro , Bravo Oscar , Salas Claudio , Yurac Ratko , Valencia Javiera , Goset Karen , Harbst Hans , Córdova Andrés 
Published: September 2021

ResumenLa enfermedad metastásica vertebral es frecuente en los pacientes con cáncer avanzado, y conlleva a complicaciones inherentes a su progresión, como lo son la fractura patológica vertebral y la compresión neural metastásica. Se realizó una revisión de los aspectos terapéuticos actuales del manejo de la progresión y de las complicaciones de la enfermedad metastásica vertebral, enfatizando su enfrentamiento sistémico y personalizado. Nuestro objetivo principal es proporcionar información sobre el tratamiento actual de esta afección y la utilidad del manejo sistémico y multidisciplinario.
¿Es segura la cirugía ambulatoria de reconstrucción de ligamento cruzado anterior? Experiencia a dos años de seguimiento clínico
Authors: Edwards Diego , Anastasiadis Zoy , Guiloff Rodrigo , Valderrama Carlos , Espina Angelo , Arellano Sergio , Schmidt-Hebbel Andrés , Vaisman Alex 
Published: September 2021

Resumen
Introducción La cirugía ambulatoria permite una reducción importante del costo en procedimientos de alta prevalencia; no obstante, siempre debe resguardarse la seguridad del paciente.
Objetivo Evaluar las complicaciones operatorias tempranas y resultados funcionales en pacientes sometidos a reconstrucción de ligamento cruzado anterior (R-LCA) en cirugía ambulatoria. Se analiza además una estimación en la reducción de costos por programa ambulatorio.
Material y Métodos Estudio retrospectivo de pacientes sometidos a R-LCA con técnica hueso-tendón-hueso (HTH) en pabellón ambulatorio en un mismo centro, entre 2016 y 2018. Se excluyeron pacientes con menos de un año de seguimiento. Se utilizó el mismo protocolo anestésico: anestesia espinal y bloqueo sensitivo único, asociado a analgesia postoperatoria por vía oral. Se entregó a pacientes instructivo de cuidados postoperatorios, síntomas de alarma, y ejercicios de fisioterapia al alta. Se realizó encuesta telefónica al tercer día para evaluar el estado general y las complicaciones, y, al final del seguimiento, para evaluación funcional mediante las escalas de Tegner y Lysholm pre- y postquirúrgicos. Se identificaronó a pacientes no dados de alta el mismo día, consulta precoz no programada, y reintervenciones.Se realizó un análisis de costo para evaluar el ahorro por procedimiento ambulatorio versus hospitalizado.
Resultados Se operaron 36 pacientes de forma ambulatoria. En 4 (11,1%) se asoció a sutura meniscal con técnica dentro-fuera.La encuesta postoperatoria inicial fue respondida por 23 pacientes (63,8%); todos presentaron buen estado general: 43% sin dolor y 57% con molestias tolerables. No hubo sangrados.La encuesta al final del seguimiento (promedio: 22,5 ± 7,9meses) fue respondida por 20 pacientes (55,5%): la puntación en las escalas de Tegner y Lysholm aumentó significativamente, de 3 (rango: 1 a 6) a 6 (rango: 3 a 8) (p = 0,0001) y de 44 (rango: 12 a 81) a 91 (rango: 61 a 100) (p = 0,0001), respectivamente.Todos fueron dados de alta el mismo día de la operación.Hubo 2 (5,5%) consultas precoces, una por caída en domicilio con dehiscencia de herida operatoria, y otra por hematoma no complicado. Se registraron dos reintervenciones: una dehiscencia de herida operatoria y una fractura de patela.La reducción de costos por realizar el procedimiento de forma ambulatoria fue de 203.205 pesos/paciente.
Conclusión La cirugía ambulatoria de R-LCA mediante la técnica HTH fue un procedimiento seguro en esta serie, con un manejo adecuado del dolor y resultados funcionales satisfactorios al mediano plazo. Se asoció además a una reducción en estimación de costos.
Optimizing Identification of People Living with HIV from Electronic Medical Records: Computable Phenotype Development and Validation
Authors: Liu Yiyang , Siddiqi Khairul A. , Cook Robert L. , Bian Jiang , Squires Patrick J. , Shenkman Elizabeth A. , Prosperi Mattia , Jayaweera Dushyantha T. 
Published: September 2021

Abstract
Background Electronic health record (EHR)-based computable phenotype algorithms allow researchers to efficiently identify a large virtual cohort of Human Immunodeficiency Virus (HIV) patients. Built upon existing algorithms, we refined, improved, and validated an HIV phenotype algorithm using data from the OneFlorida Data Trust, a repository of linked claims data and EHRs from its clinical partners, which provide care to over 15 million patients across all 67 counties in Florida.
Methods Our computable phenotype examined information from multiple EHR domains, including clinical encounters with diagnoses, prescription medications, and laboratory tests. To identify an HIV case, the algorithm requires the patient to have at least one diagnostic code for HIV and meet one of the following criteria: have 1+ positive HIV laboratory, have been prescribed with HIV medications, or have 3+ visits with HIV diagnostic codes. The computable phenotype was validated against a subset of clinical notes.
Results Among the 15+ million patients from OneFlorida, we identified 61,313 patients with confirmed HIV diagnosis. Among them, 8.05% met all four inclusion criteria, 69.7% met the 3+ HIV encounters criteria in addition to having HIV diagnostic code, and 8.1% met all criteria except for having positive laboratories. Our algorithm achieved higher sensitivity (98.9%) and comparable specificity (97.6%) relative to existing algorithms (77–83% sensitivity, 86–100% specificity). The mean age of the sample was 42.7 years, 58% male, and about half were Black African American. Patients' average follow-up period (the time between the first and last encounter in the EHRs) was approximately 4.6 years. The median number of all encounters and HIV-related encounters were 79 and 21, respectively.
Conclusion By leveraging EHR data from multiple clinical partners and domains, with a considerably diverse population, our algorithm allows more flexible criteria for identifying patients with incomplete laboratory test results and medication prescribing history compared with prior studies.
Percepción de acoso o discriminación durante la residencia de urología en Colombia
Authors: Ortiz-Zableh Ana María , Quiñones Roa Andres Felipe , Santamaria Fuerte Bernardo , Tobar-Roa Veronica 
Published: September 2021

Resumen
Objetivos El maltrato laboral (acoso, abuso o discriminación) ejercido de manera persistente contra un individuo genera un ambiente de trabajo hostil y lleva a agotamiento, con un impacto psicológico importante y la posibilidad de aparición de síntomas depresivos. En Colombia, no contamos con publicaciones al respecto.El objetivo de nuestro trabajo es conocer la percepción de los residentes de urología en cuanto a discriminación de género y acoso laboral, verbal y sexual durante su formación.
Metodos Estudio observacional, descriptivo, de corte transversal, por medio de encuestas anónimas. Evaluamos las características demográficas, la percepción de acoso, el tipo de acoso, si éste afectó el rendimiento laboral del residente, y por parte de quién lo percibió.
Resultados Obtuvimos respuestas de 82/115 (71,3%) residentes, en su mayoría hombres (45 [56%]). En total, 66% (54) reportaron haber experimentado acoso laboral; y 35,4% (29) reportaron haber experimentado discriminación de género, siendo más frecuente en las mujeres (17; 58,6%). El acoso verbal fue reportado por un 64,6% (53), y afectó el trabajo de un 92,5%. La percepción de acoso laboral fue similar entre hombres y mujeres (32 [69.5%] hombres y 21 [61.1%] de mujeres). En total, 7 (19%) mujeres reportaron acoso sexual. Con respecto a la fuente de acoso, 39 (65,8%) fue por profesores, 26 (45%), por otros residentes, y 17 (35.4%), por pacientes.
Conclusión La percepción de acoso durante la residencia de urología en Colombia es real, y afecta el trabajo de los residentes. Este acoso es mayor por parte de los hombres, y es principalmente generado por profesores. Consideramos nuestro trabajo el punto de partida para continuar investigando un tema de importancia a nivel nacional y internacional.
High-performance AEM unitized regenerative fuel cell using Pt-pyrochlore as bifunctional oxygen electrocatalyst
Authors: Gayen Pralay , Saha Sulay , Liu Xinquan , Sharma Kritika , Ramani Vijay K. 
Published: September 2021

SignificanceUnitized regenerative fuel cells (URFCs) combine the functionalities of both electrolyzers and fuel cells in a single cell/stack, enabling lower weight, volume, and capital cost. A fixed-gas URFC (FG-URFC) has the advantage of efficient and easy gas management. A highly active and highly stable bifunctional oxygen electrocatalyst with low bifunctionality index (BI) helps in achieving high performance and high round-trip efficiencies (RTE) in a URFC. In this context, Pt-Pb2Ru2O7-xelectrocatalyst is synthesized and evaluated as bifunctional oxygen electrocatalyst in alkaline medium. This electrocatalyst exhibits a low BI with highly symmetric oxygen reduction and evolution activity. The FG-URFC using Pt-Pb2Ru2O7-xshows high RTE for an anion exchange membrane FG-URFC, providing a pathway for the development of FG-URFCs for bidirectional energy and fuel production.
Sublimation-driven morphogenesis of Zen stones on ice surfaces
Authors: Taberlet Nicolas , Plihon Nicolas 
Published: September 2021

Significance
Zen stones are fascinating natural structures consisting of a stone standing on a slender ice pedestal, whose origin had long been misunderstood. We demonstrate that they are caused by a variation in the sublimation rate of the surrounding ice, which leads to the slow formation of a pedestal, adding to the very few reports of sublimation-driven pattern formation. Understanding this process sheds light on other differential ablation processes encountered on ice surfaces, such as debris-covered glaciers, whose existence is threatened by global warming, and icy bodies in space. Indeed, NASA’s Europa Lander project aims to seek biosignatures on Jupiter’s ice-covered moon, on the surface of which differential sublimation may threaten the lander stability, and this needs to be fully understood.
Processing of the Mandarin polarity itemrenhe‘any’
Authors: Wu Hongchen , Yun Jiwon 
Published: September 2021

AbstractThe Mandarinrenheis similar to the Englishanyin terms of polarity sensitivity (Wang 1993;Wang & Hsieh 1996;Kuo 2003;Cheng & Giannakidou 2013;Shyu 2016). However, the following phenomena regardinganyin relative clause environments have not been surveyed with respect torenhe:(a) the NPI illusion effect reported in studies like Parker & Phillips (2011;2016); (b) the subtrigging effect discussed inLeGrand (1975)and Dayal (1998;2004). We conducted two untimed, offline acceptability judgment experiments and the results suggest that: (i) NPI illusion does not appear in Mandarin in untimed offline processing, (ii) the subtrigging effect ofrenheholds, and (iii)renhecan be licensed by certain types of declarative verbs liketongyi‘agree’ andzancheng‘approve’. The results confirm the strict structural requirement of the c-commanding relation between a negation licensor andrenhe(Wang 1993) and the licensing ofrenhein non-veridical contexts (Cheng & Giannakidou 2013), and further suggest additional licensing environments forrenhe: relative clauses and declarative verbs. This requires reconsideration of positing non-veridicality as a necessary licensing condition forrenheand calls for future research on howrenheis licensed under these two licensing environments.
Application of photoplethysmography signal in diagnosis of cerebrovascular disease and its extraction method based on Wavelet Transform
Authors: Zhu Xiangyu , Liu Jingwen , Zha Yutong 
Published: September 2021

Abstract
Effective monitoring of physiological information can effectively control incidence rate and mortality rate for patients with cerebrovascular disease. Among them, near infrared spectroscopy (NIRS) can measure the photoplethysmography (PPG) of cerebral cortex, which provides a new solution for the current detection of cerebrovascular physiological information. There are a lot of characteristic parameters in the pulse wave signal, which can be used to evaluate the cerebrovascular condition. In the time domain, the K value, the main wave width w, the main wave slope k were calculated to evaluate the cerebral vascular sclerosis. And in the frequency domain, the blood pressure of patients can be evaluated by the spectrum amplitude A. Besides, to improve the quality and accuracy of PPG signal parameter calculation, PPG with low noise and distortion is needed to provide support. By analyzing the interference of PPG signal in different frequency bands, the wavelet filtering method is adopted to process the signal. Through the calculation of root mean square error (RMSE) and signal-to-noise ratio (SNR), it is found that this method has excellent extraction effect on PPG signal.
Safety state monitoring analysis of seepage from Daban Reservoir
Authors: Sun Yiwen , Duan Xiangbao , Li Jingjuan 
Published: September 2021

Abstract
To understand the seepage security state of Daban Reservoir dam, process line analysis, correlation analysis, infiltration slope drop analysis and permeability analysis were conducted on the seepage monitoring data, and single-factor and multivariate statistical models were established to demonstrate the influencing factors of the pipe water level. The results show that the dam is generally effective in preventing seepage, the change in seepage flow before and after the seepage wall is not significant, the measured infiltration line is higher than the design value, and the correlation between the pipe water level and the reservoir water level is significant. 2020 flood season seepage occurs on the downstream slope of the dam, the height is higher than the top elevation of the drainage body, the actual operation results verify the accuracy of the analysis of the monitoring data and there is a seepage flow safety hazard. It is recommended that measures be taken to eliminate potential seepage hazards and to strengthen safety monitoring and surveillance.
A New super-resolution restoration method with Generated Adversarial Network for underground video images in coal mines
Authors: Yang Guangyao , Wang Yumo , Yi Chun , Wang Zhongqiang 
Published: September 2021

Abstract
The computer can be used in Super-resolution reconstruction (SR) to process low-resolution images to obtain high-resolution images. Aiming at solving problems of complex underground video image acquisition environment, uneven brightness, blurred images etc, this paper adopts the idea of deep learning to perform super-resolution restoration of underground video images in coal mines, and proposes a generational confrontation network to super-resolution underground video images in coal mines. The experiment proves that Generated Adversarial Network (GAN), while being compare with Super-resolution Deep Convolutional Neural Network (SRCNN), Efficient Sub-Pixel Convolutional Neural Network (ESPCN), Deeply Recursive Convolutional Network (DRCN) the effect of GAN method is better, because it can better realize the super-resolution restoration of underground video images in coal mines and provide preliminary support for the subsequent and further application research of underground images in coal mines.
Research on leaf image identification based on improved AlexNet neural network
Authors: Zhang Wenkun , Wen Juanjuan 
Published: September 2021

Abstract
The results of plant leaf classification can be used in many fields, such as plant protection. In addition, it also plays a certain role in the spread of plant diversity knowledge. At present, the recognition of plants by leaves has become a popular issue in many fields. This paper focuses more on what kind of network structure to choose to identify plant leaves. Convolution neural network is a popular network structure in recent years. Features are extracted by convolution layer, feature dimension reduction is completed by pooling layer, and finally a column vector is output by fully connected layer, and leaf recognition and classification are completed by classifier. Therefore, we construct an 11 layer convolution neural network, and select plant leaves to complete the five classification of plant leaves, and try to modify the different parameters of the network structure, choosing various optimizer, the average accuracy of the final test set is more than 99%. From the experimental results, the model has high recognition rate and high accuracy for the existing blades, which has a certain practical significance.
An Improved Multi-Target Recognition Method for Vehicle Linear Frequency Modulated Continuous Wave Radar
Authors: Lin Yiran 
Published: September 2021

Abstract
With the rise of unmanned driving technology and advanced driver assistance systems (ADAS), millimeter-wave radar plays a key role in the field of autonomous driving due to its unique advantages. It can provide forward target information (distance, velocity and angle) for vehicle decision-making and execution systems. Linear frequency modulated continuous wave (LFMCW) automotive radar usually divides the velocity ambiguity resolution and angle estimation into two frames for processing, which will reduce the radar data rate. This paper proposes an improved automotive LFMCW radar multi-target recognition method, which uses the TMD method to transmit sawtooth signals with different time widths and the same bandwidth, and completes range velocity calculation, angle estimation and divides the velocity ambiguity resolution within one frame. This algorithm can simplify the steps of resolving velocity ambiguity and improve the angle measurement accuracy. And it has certain reference significance for the research and application of the LFMCW automotive radar.
Research on image preprocessing for iris recognition
Authors: Mo XiuYing , Chen Tan 
Published: September 2021

Abstract
With the development of social economy, identity identification has penetrated into every aspect of people’s life. As the bottom technology of identity authentication, biometric technology is getting more and more attention in recent years. At present, iris based identification technology is a research hotspot with rapid development at home and abroad. Iris, as an important identification feature, has the advantages of uniqueness, stability, collectability and non-invasive. In this paper, the iris recognition algorithm is deeply studied, focusing on the image preprocessing in the iris recognition algorithm. In the aspect of positioning, the coarse to fine algorithm is used to ensure the accuracy and improve the positioning speed. The pupil location is divided into three steps. Based on the accurate pupil location, the iris is located in one step, and the effectiveness of the location is tested.