bluuebunny/crossref_metadata_2025 huggingface dataset:
Análisis sobre el movimiento político-religioso MIRA y su crecimiento en Bogotá
Authors:   , López Pereira Rolando Andrés
Published: July 2022

El presente trabajo de investigación es una aproximación al fenómeno político en que se convirtió el Movimiento Independiente de Renovación Absoluta (MIRA) en el último decenio. Fundado en 2000, este movimiento de raigambre religiosa, nacido como brazo político de la Iglesia de Dios Ministerial de Jesucristo Internacional (IDMJI), se convirtió en un muy corto espacio de tiempo en la "vedette" de las últimas elecciones a cargos públicos en Colombia. El objetivo de esta tesis es entregar al lector un análisis que informe sobre las estrategias políticas, electorales, clientelares y de fe de las que ha hecho uso el MIRA para obtener los formidables índices de crecimiento que registra hasta 2010. Para ello en los primeros capítulos se entregan unos conceptos políticos básicos que sirvan para comprender el por qué de la incursión de credos religiosos en el ámbito político, lo mismo que una breve reseña histórica que pueda utilizarse para entender la historia del cristianismo colombiano y su posterior imbricación en el sistema político nacional. Esta investigación entrega al lector en sus conclusiones una interpretación sobre por qué el electorado colombiano ha optado por refugiarse en nuevas opciones políticas como el MIRA, al tiempo que hace un balance de las ventajas y desventajas (más de estas últimas) que pueden aparecer con la incursión de lo privado (la religión) en lo público (la política).
Memorias, pluralidad y movimiento social la experiencia del MOVICE
Authors:   , Mora Lemus Giovanni
Published: July 2022

Esta tesis tiene como tema fundamental preguntarse por el nacimiento y desarrollo del Movimiento Nacional de Víctimas de Crímenes de Estado (MOVICE). Este movimiento surge en un contexto político singular| los Acuerdos de Ralito entre la cúpula paramilitar y el gobierno de Uribe Vélez que se inician en el año 2003, las investigaciones judiciales sobre la relación entre congresistas y políticos locales con las fuerzas paramilitares y la promulgación de la ley de justicia y paz en 2005 que fue el marco jurídico que permitió la desmovilización de algunas estructuras militares de los ejércitos de ultraderecha. Por otro lado, la memoria colectiva de las víctimas de Estado en Colombia hace mucho ha venido desarrollando trabajos en torna a la recuperación de la misma. Distintas organizaciones nacionales de Derechos Humanos se preocuparon de tiempo atrás, por negarse al olvido estatal y visibilizar los delitos de lesa humanidad que han sucedido en el marco del conflicto armado. Esta tesis resalta el trabajo de una de ellas, la Corporación Reiniciar. El MOVICE tiene un poderoso antecedente en esta ONG y en el Proyecto Colombia Nunca Más. De igual forma, la tesis indaga no solo por la memoria construida por la Corporación Reiniciar, sino además por el colectivo Hijos e hijas por la memoria y contra la impunidad. La investigación termina haciendo un análisis sobre los obstáculos y las posibilidades de desarrollo del MOVICE en el futuro.
Equidad de género en el empleo del sector salud, Colombia 2008-2010
Authors:   , García Roa Erika Madeline , Tapias Torrado Liliana
Published: July 2022

Este estudio presenta un análisis del empleo en el sector salud en Colombia, desde una perspectiva de género| evidenciando algunas limitaciones para avanzar en la equidad de género y salud en el país. El estudio devela que este "mercado" no es neutro en términos de género, puesto que discrimina a las mujeres en la remuneración y acceso al poder, lo cual se demuestra en la brecha salarial y la segmentación vertical. También revela una actividad laboral de baja calidad que obstaculiza la inclusión social, la dignidad y la libertad humana. La precariedad del empleo en el sector salud, producida por los cambios en el modelo de prestación de servicios y las políticas laborales, afecta el empleo de hombres y mujeres| sin embargo, en la medida que las mujeres representan el 71% del sector, las consecuencias son desproporcionadas para ellas. Dicha situación influye en el empleo femenino del país y expresa el bajo reconocimiento social de los trabajos que realizan, evidenciándose una discriminación velada y estructural. Luego se constata, que los esfuerzos por eliminar todas las formas de discriminación y garantizar resultados equitativos para ambos sexos aún son débiles. Es un estudio exploratorio y analítico, en el cual se construye un significado de "equidad de género en el empleo" a partir de los conceptos claves - género y empleo- y las relaciones entre estos| se generan categorías e indicadores que permiten hacer su medición| utilizando como fuente de información la Encuesta GEIH (2008) y entrevistas etnográficas.
Cambios en las condiciones, trayectorias y proyectos de vida de las y los jóvenes en situación de desplazamiento asentados en Bogotá
Authors:   , Pinilla Alarcón Maribel , Rodríguez Colmenares Sandra Mónica
Published: July 2022

A través de un enfoque cualitativo, con un alcance descriptivo - analítico, este estudio centrado en las percepciones de las y los jóvenes, describe los cambios en las condiciones (vivienda, alimentación, salud, educación y empleo), trayectorias y proyectos de vida de 35 jóvenes| en situación de desplazamiento asentados en Bogotá, en la localidad de Ciudad Bolívar (Caracolí y Robles). Se analizaron los cambios ocurridos en sus ámbitos individual, familiar y social, a través de sus trayectorias y proyectos de vida| comparando el antes y el después de la vivencia del desplazamiento. Al igual que los mecanismos para lograr un adecuado desarrollo personal e integración social a su nuevo entorno. Este trabajo permitió tener un acercamiento a la realidad y a las necesidades que presentan las y los jóvenes cuando se enfrenta a situaciones difíciles como lo es el desplazamiento forzado por la violencia, considerado como la peor situación que ha tenido que enfrentar el país| pero además permitió identificar que las y los jóvenes tienen una mayor capacidad de adaptabilidad y resiliencia con un afrontamiento más eficaz, a los cambios ocurridos en sus condiciones, trayectoria y proyecto de vida. Los resultados muestran cambios en cada una de las categorías propuestas, pero hacen evidente la necesidad de políticas de juventud y desplazamiento inclusivas y diferenciadoras| acordes con las necesidades de las y los jóvenes desplazados, quienes son actores sociales y personas sometidas a vivir una situación que no eligieron para sus vidas| y que tengan una vía que les permita espacios de participación activa.
Efecto de los costos no salariales sobre el empleo formal de la industria manufacturera colombiana
Authors:   , Ferro Hernández María Isabel , Cuéllar Illera Andrés
Published: July 2022

La industria de manufactura colombiana no presenta un nivel de especialización exclusivo en un solo producto; está compuesta por Divisiones que fabrican diversos bienes o servicios y que, dependiendo de su complejidad, demandan una determinada cantidad de Trabajo, Capital, Energía, Materias Primas, entre otros factores de producción. Este documento analiza el efecto que sobre este sector, y especialmente sobre algunas Divisiones del mismo, pueden tener las variaciones de los costos no salariales (CNS) en los que debe incurrir un empleador por cada trabajador contratado. Partiendo de un modelo que se basa en la literatura consultada y empleando Panel de Datos para el periodo 2000 al 2009, se encuentra que ante un incremento en los costos no salariales el nivel de empleo disminuye en las cuatro Divisiones estudiadas. Sin embargo, la magnitud de la reducción está relacionada con la intensidad en mano de obra que deba utilizar la división y/o el nivel tecnológico que aplique en su actividad productiva.
Estudio analítico de crisis financieras desde una perspectiva de riesgo sistémico y determinantes de la cartera vencida real del sector financiero colombiano.
Authors:   , Granados Ruiz Alberto Andrés
Published: July 2022

En este trabajo se hace un análisis de crisis financieras, su relación con algunas variables económicas y variables del sistema financiero Colombiano. Adicionalmente, se presenta un ejercicio en donde se analiza cómo reacciona la razón cartera vencida / cartera bruta ante cambios en las demás variables, proponiendo un modelo multivariado. Finalmente, se encontró que los impulso respuesta de las variables utilizadas indican consistencia con la literatura y la teoría económica.
Inequidades en el acceso al sistema general de seguridad social en salud en Colombia
Authors:   , Guerrero Torres Harry Salomón , Trujillo Otero Nini Johanna
Published: July 2022

Mediante el uso de herramientas econométricas, se analiza la inequidad en el acceso al Sistema de Seguridad Social en Salud SGSSS-, en Colombia, problemática que se justifica observar si se tiene en cuenta que es de alta sensibilidad social, y las conclusiones y recomendaciones aquí descritas pueden ser insumo para conocer en cifras las determinantes del acceso al Sistema, tomando como fuente de datos la Gran Encuesta Integrada de Hogares del año 2008. El modelo utilizado para este análisis es un modelo Probit, toda vez que este permite el análisis de una regresión de respuestas binomiales, es decir, que se analizan a la vez dos condiciones y se realizan diferentes estimaciones para evaluar cuales son los principales factores que influyen en estar o no afiliado a algún régimen de seguridad en salud (subsidiado o contributivo). Para la estimación del modelo se usaron como variables independientes la jefatura de hogar, ruralidad, sexo, edad, pobreza, alfabetismo y estrato social del barrio donde reside, como variable dependiente la afiliación (afiliado, no afiliado), según régimen específico, en el siguiente orden: - Probabilidad de estar afiliado al régimen subsidiado. - Probabilidad de estar afiliado al régimen contributivo.
Efectos del Mila en el mercado de activos financieros colombiano(año 2012)
Authors:   , Buendía Maya Andrés Hernán , Giraldo Ortiz Juan Diego
Published: July 2022

El plan de integración de la Bolsa de Comercio de Santiago (Chile), La Bolsa de Valores de Lima (Perú) y la Bolsa de Valores de Colombia, con el cual se busca obtener una mayor liquidez en el mercado de activos financieros de dichos países, es ya una realidad. La integración debe permitir una modernización de los mercados bursátiles de Colombia, Perú y Chile. Con la integración podrán existir más instrumentos financieros y serán muchas más las posibilidades de diversificación de las inversiones, lo cual mitigará el riesgo retorno de cada una de ellas. Sin embargo, el arranque de esta integración ha sido lento. Las posibles diferencias en los sistemas de los países miembros, y la falta de información entorno a los títulos de renta variable de los otros países, ha dificultado las transacciones y no ha permitido obtener los resultados esperados.
Serotipificación molecular y susceptibilidad antimicrobiana de listeria monocytogenes, aislada de carne y derivados de origen porcino, en el departamento del Tolima
Authors:   , Moreno Ocampo Paola Andrea
Published: July 2022

Listeria monocytogenes es un microorganismo patógeno que afecta a humanos y animales, como agente causal de una de las más importantes enfermedades transmitida por alimento (ETA), denominada Listeriosis. Esta bacteria se asocia con alimentos tales como la leche, quesos, ensaladas y productos cárnicos, lo que la convierte en un problema para la industria alimentaria, en especial en la industria cárnica. En este estudio se evaluó la prevalencia de L. monocytogenes en el departamento del Tolima. Para ello, se analizaron 377 muestras de materia prima, derivados cárnicos de origen porcino, ambientes y manipuladores en plantas de proceso y en expendios. Para el análisis microbiológico de las muestras se aplicó el protocolo de la ISO11290-1. A los aislamientos se les aplicó serotipificación por PCR y pruebas de susceptibilidad antimicrobiana. Se obtuvieron 55 (14,5 %) aislamientos de Listeria spp., 5 (1,3 %) de L. monocytogenes y 2 (0,5 %) correspondieron a L. ivanovii., en los que se encontraron los serotipos 4b/4d/4e y 4a/4c, ambos hallados en materia prima, operarios manipuladores y superficies de trabajo.Los aislamientos presentaron una susceptibilidad del 100% para ampicilina, penicilina, trimetoprim/sulfatometoxazol, azitromicina, cloranfenicol, tetraciclina y vancomicina. En conclusión, se confirmó la presencia de L. monocytogenes en diferentes eslabones de la producción de derivados cárnicos porcinos. La presencia de Listeria spp. (14,5 %) evidencia serias fallas en los procesos de limpieza y desinfección. Los antibióticos de elección para el tratamiento de listeriosis en humanos presentaron una eficiencia del 100% en los aislamientos estudiados. Como resultado de este estudio se presenta el primer reporte de Listeria en el departamento del Tolima.
Implicaciones políticas y sociales que impone el actual modelo de asistencia social en la cultura política : el caso de la localidad 20 de Sumapaz
Authors:   , Alejo Garzón Francois
Published: July 2022

Este trabajo presenta una reflexión acerca del modelo de asistencia social (AS) neoliberal implementado en Colombia y sus efectos políticos. El objetivo es conformar mediante un estudio de caso relacionado con la política asistencial de la Localidad 20 de Sumpaz, un marco de análisis que permita describir y entender las repercusiones que deja en el orden de la cultura política y la movilización social, la implementación de programas sociales focalizados y condicionados| elaborados y aplicados desde el Estado sobre la base del nuevo concepto de "lucha contra la pobreza". El argumento central es que los procesos impuestos por el actual modelo de asistencia social, contienen una serie de instrumentos complejamente diseñados, legitimados bajo un discurso dominante y ampliamente financiados| que en su combinación e implementación adecuada, pueden convertirse en una tecnología de poder efectiva para controlar políticamente a poblaciones socialmente excluidas y con "propensión peligrosa" al conflicto y la protesta social.
Una aproximación a los debates actuales sobre el estudio académico e investigativo sobre videojuegos
Authors: Rey Vásquez Elías Manaced
Published: July 2022

Una aproximación sobre los principales debates académicos y científicos actuales con relación a los videojuegos, se constituye en un necesario insumo para advertir las tendencias en las cuales se pueden inscribir los proyectos que surgen para comprender este fenómeno social, cultural y político. Este es el problema que constituye el presente estudio. Se hace un énfasis en la producción académica e investigativa de los últimos 30 años, por ser el tiempo en el que comienza la gesta por consolidar un campo académico, interdisciplinario y autónomo sobre los estudios del videojuego (games studies). Se concluyen tres tendencias centrales, de las que se derivan muchas otras líneas de investigación; a saber, el problema del videojuego, los efectos de los videojuegos y el videojuego como expresión cultural.
Gain-Scheduled Steering and Braking Coordinated Control in Path Tracking of Intelligent Heavy Vehicles
Authors: Dong Qing , Ji Xuewu , Liu Yulong , Liu Yahui
Published: July 2022

In the context of intelligent transportation system and advanced vehicle control system, higher requirements for intelligent control and coordinated control of heavy vehicles (HVs) have been proposed. Automatic path tracking control is essential for automatic driving of heavy vehicles. However, uncertain lateral disturbances and time-varying characteristics of system parameters make it difficult to guarantee roll stability and path tracking accuracy during automatic path tracking. This paper investigates the coordination of active front steering (AFS) and direct yaw moment control (DYC) in the automatic path tracking system for intelligent heavy vehicles. The main idea is to adjust the braking action according to the rollover risk evaluated by a specific rollover index (RI). The coordination of steering and braking systems and the robustness of the system against time-varying parameters are achieved by a gain-scheduled linear parameter varying (LPV) controller. Based on the linear matrix inequality (LMI) framework, the LPV controller is synthesized to ensure the robust H∞ performance against external disturbances. Simulation results show that the proposed gain-scheduled LPV/H∞ control strategy can enhance roll stability and path tracking accuracy in the path tracking process of intelligent heavy vehicles.
Multiple Mechanisms Confer Resistance to Azithromycin in
Shigella
in Bangladesh: a Comprehensive Whole Genome-Based Approach
Authors: Nusrin Suraia , Asad Asaduzzaman , Hayat Shoma , Islam Bitali , Begum Ruma , Nabila Fahmida Habib , Islam Zhahirul
Published: July 2022

Shigella
can frequently transform into a superbug due to uncontrolled and rogue administration of antibiotics and the emergence of HGT of antimicrobial resistance factors. The advent of AZM resistance in
Shigella
has become a serious concern in the treatment of shigellosis.
Optimizing Conditions in the Acid Tolerance Test for Potential Probiotics Using Response Surface Methodology
Authors: Ko Hye In , Jeong Chang Hee , Hong Sung Wook , Eun Jong-Bang , Kim Tae-Woon
Published: July 2022

The acid tolerance test, which is the first step in selecting probiotics, is not standardized and can often cause confusion in the interpretation of results. Thus, in the present study, we optimized the conditions for the acid tolerance test using response surface methodology. These optimized conditions can be used to screen for strains with acid tolerance.
A comprehensive genetic model for the world’s largest Sb deposit (Xikuangshan, China)
Authors: Fu Shanling , Hu Ruizhong , Peng Jiantang , Wu Liyan , Ma Dongsheng
Published: July 2022

The Mesozoic (160–130 Ma), fault-controlled Xikuangshan Sb deposit within Devonian limestone strata of Hunan Province, Southern China is the world’s largest Sb deposit containing a proven reserve of ~2.5 m Sb. Although mined for over a century, its genesis remains poorly understood. Here we use new He-Ar isotope data of hydrothermal stibnite and both new and existing C-O-Sr-Nd isotopes of hydrothermal calcite with known stages to decipher its genesis and the major constraints on mineralization intensity. The 3He/4He and 40Ar/36Ar ratios of fluid inclusions trapped in stibnite are from 0.01 to 0.04 Ra (Ra: atmospheric 3He/4He ratio) and 304–1077, respectively, indicating the ore-forming fluids at Xikuangshan were dominated by air-saturated meteoric groundwater after interaction with crustal rocks. Ore-stage calcite C and O isotopes indicated that most CO2 in the fluids was acquired from marine carbonate rocks by dissolution; whereas Sr and Nd isotopes differed from deposited Devonian country rocks but were similar to the underlying regional Proterozoic clastic rocks in the region. Calcite from early and late stages showed a strong positive correlation between δ18O and 87Sr/86Sr, consistent with the mixing between the circulating groundwater and compounds released from the Proterozoic rocks due to extensive fluid-rock interaction. The 3He/Q ratios of the fluid inclusions are low, varying from 4.3 to 18.5 × 10−15 cm3 standard temperature and pressure (STP) J−1, indicating deep-seated magma could have provided heat by conduction but no volatiles into the ore-forming fluids. Based on these new results, we suggest that deep-seated granitic magma heated the down-going meteoric groundwater along fault zones, after which the groundwater extensively interacted with and extracted Sb from the Proterozoic Sb-rich rocks to form Sb-rich fluids. The Sb-rich fluids then ascended through regional faults and deposited Sb as stibnites at favorable structural traps to form the Xikuangshan Sb deposit. This study highlights that extensive water-rock interaction is essential to form the deposit, and more intensive water-rock interaction at an early stage allowed for early-stage mineralization yielding higher Sb reserves (>80%) at Xikuangshan.
Pancreatic herniation: a large pancreatic mass concealed within the intrathoracic cavity
Authors: Karan Abhinav , Kiamos Amy , Stack Anthony , Gharia Bharatsinh
Published: July 2022

Cancer of unknown primary is a challenging entity. We present an elderly woman with metastatic cancer of unknown primary despite comprehensive imaging and immunohistochemical analysis. Based on a thorough history, a gastrointestinal source was suspected and a diagnosis of pancreatic cancer concealed within a type IV hiatal hernia was made using multimodal imaging. On review of prior imaging, due to the highly complex anatomy within our patient’s hiatal hernia, the pancreatic mass was retroactively noted. While initial imaging may detect metastatic disease, identifying the primary malignancy requires a thorough history and physical examination, multimodal imaging where malignancy is suspected, and immunohistochemical analysis of metastatic deposits. Herniation of pancreatic cancer has not been previously described in the literature and serves as an important reminder of the importance of multimodal imaging in patients with significantly complex anatomy.
Identification ofRNF13as cause of recessively inherited ALS in a multi-case pedigree
Authors: Khani Marzieh , Nafissi Shahriar , Shamshiri Hosein , Moazzeni Hamidreza , Taheri Hanieh , Elahi Elahe
Published: July 2022

Background

Amyotrophic lateral sclerosis (ALS) is the most common motor neuron disease. The approximately 50 known ALS-associated genes do not fully explain its heritability, which suggests the existence of yet unidentified causative genes. We report results of studies aimed at identification of the genetic cause of ALS in a pedigree (three patients) without mutations in the common ALS-causative genes.

Methods

Clinical investigations included thorough neurological and non-neurological examinations and testings. Genetic analysis was performed by exome sequencing. Functional studies included identification of altered splicing by PCR and sequencing, and mutated proteins by western blot analysis. Apoptosis in the presence and absence of tunicamycin was assessed in transfected HEK293T cells using an Annexin-PE-7AAD kit in conjunction with flow cytometry.

Results

Clinical features are described in detail. Disease progression in the patients of the pedigree was relatively slow and survival was relatively long. AnRNF13mutation was identified as the cause of the recessively inherited ALS in the pedigree. The gene is highly conserved, and its encoded protein (RING finger protein 13) can potentially affect various neurodegenerative-relevant functions, including protein homeostasis. TheRNF13splice site mutation caused expression of two mis-spliced forms ofRNF13mRNA and an aberrant RNF13 protein, and affected apoptosis.

Conclusion

RNF13was identified as a novel causative gene of recessively inherited ALS. The gene affects protein homeostasis, which is one of most important components of the pathology of neurodegeneration. The contribution ofRNF13to the aetiology of another neurodegenerative disease is discussed.
Safety of breast feeding during rituximab treatment in multiple sclerosis
Authors: Rød Brit Ellen , Torkildsen Øivind , Myhr Kjell-Morten , Bø Lars , Wergeland Stig
Published: July 2022

Background

There are limited data on the safety of breast feeding during rituximab therapy. Our objective is to determine exposure from breast feeding and biological effects of rituximab in breastfed infants.

Methods

In our case series of six mother–infant pairs, the nursing mothers with relapsing-remitting multiple sclerosis received rituximab during breast feeding. As part of clinical follow-up, six serial breast milk samples, and blood samples from both mothers and infants, were collected and analysed.

Results

The median average rituximab concentration (Cavg) in breast milk was 0.04 µg/mL and the estimated relative infant dose (RID) was 0.07%. The highest measured concentration of rituximab in the breast milk samples was 0.25 µg/mL, giving an estimated RID of 0.26%.

All infant serum rituximab concentrations were below 0.01 µg/mL. The CD19 +B cell count values were within the 10th– 90th percentiles of reported normal ranges in healthy infants.

Conclusions

We found minimal transfer of rituximab into breast milk and could not reliably detect levels of rituximab in infant serum. B cell counts in infants were unaffected.
A Class of Association Schemes and Their Automorphisms
Authors: Ma Changli , Liu Shuxia , Feng Yanan , Zhang Yang , Zeng Liwei
Published: July 2022

In this paper, we construct a class of association schemes by using pairs of subspaces of vector spaces and determine their full automorphism groups.
FiRe
2
: An Online Database for Photographic and Cinematographic Film Technical Data
Authors: Sarti Beatrice , Plutino Alice , Crespi Arianna , Morabito Giulia , Rizzi Alessandro
Published: July 2022

Among the great variety of our Cultural Heritage, photographic and cinematographic materials are fundamental and direct witnesses of the past. As often happens when dealing with materials of cultural interest, even photographic and cinematographic films can undergo severe deterioration, aging, and color fading throughout the time, leading to the need for proper restoration, conservation, and preservation of these materials. In this context, even though the digitization process is becoming more and more essential, analyzing and studying the analog materials remains fundamental to perform a retrieval or a correction faithful to the original material. For this reason, the lack of technical information (especially for the oldest materials) and the absence of open source archives of the producing companies underlines the actual and concrete need for a database of physical, chemical, and sensitometric data of both cinematography and photographic films.

The aim of this work is the creation and the promotion of FiRe
2
, a big and unique database of cinematographic and photographic materials to support the work of conservators, restorers, and researchers, as the availability of information and the cooperation between institutions and professionals are essential for preserving our Cultural Heritage.
Singularity Computation for Rational Parametric Surfaces Using Moving Planes
Authors: Jia Xiaohong , Chen Falai , Yao Shanshan
Published: July 2022

Singularity computation is a fundamental problem in Computer Graphics and Computer Aided Geometric Design, since it is closely related to topology determination, intersection, mesh generation, rendering, simulation, and modeling of curves and surfaces. In this article, we present an efficient and robust algorithm for computing all the singularities (including their orders) of rational parametric surfaces using the technique of moving planes. The main approach is first to construct a representation matrix whose columns correspond to moving planes following the parametric surface. Then, by substituting the parametric equation of the rational surface into this representation matrix, one can extract the singularity information from the corresponding matrix and return all the singular loci including self-intersection curves, cusp curves, and isolated singular points of the rational surface, together with the order of each singular locus. We present some examples to compare our algorithm with state-of-the-art methods from different perspectives including robustness, efficiency, order computation, and numerical stability, and the experimental results show that our method outperforms existing methods in all these aspects. Furthermore, applications of our algorithm in surface rendering, mesh generation and surface/surface intersections are provided to demonstrate that correctly computing the self-intersection curves of a surface is essential to generate high quality results for these applications.
Application Research of Petroleum Basic Data Mining System Based on Intelligent Computing and Decision Tree Algorithm
Authors: Wang Xiaoyan , Liang Jinjin , He Xiaoming , Yang Hua
Published: July 2022

Recent improvements in data mining technologies, besides the IoT, enable the implementation of a strategy for boosting oil output from oil wells. As a regularly employed improved oil recovery technology, steam flood injection takes use of thermodynamic and gravitational capabilities to deploy and neutralize oil on-site to raise oil output. Instead of relying on conventional physics to model steam floods, this research proposes using a combination of a chimp optimization algorithm (ChOA) and a decision tree to better represent steam flood performance. We present a method for dealing with a particular type of petroleum time series data using ChOA in conjunction with decision trees and IoT. It is shown that the method is useful in predicting oil production in steam floods. Even more impressive is the 4.02 percent increase in oil output that may be achieved via the use of a new optimization system that offers the best possible steam allocation plan. Our objective has been to develop a cloud-based minimum viable product capable of data collection and storage and also training and deployment of a cloud ChOA model. Predictive maintenance, for example, might benefit from this workflow’s ability to analyze time series data.
Combined Application of Grid Body Surface Locator and Preemptive Analgesia in Daytime Vertebroplasty
Authors: Gu Hongwen , Zhao Yuhui , Xie Yanchun , Wei Yongcun , Li Linyang , Meng Di , Yu Hailong
Published: July 2022

Objective. To explore the clinical advantages of grid body surface locator combined with preemptive analgesia in the treatment of osteoporotic lumbar fractures in daytime vertebroplasty. Methods. A retrospective study was conducted on 120 patients who underwent lumbar vertebroplasty in the Department of Orthopedics of General Hospital of Northern Theater Command from January 2017 to January 2020. According to the preoperative planning and analgesic mode of treatment, they were divided into the daily operation experimental group and the traditional mode control group. Prone positioning of a patient under anesthetic is safe of ensuring optimum surgical access for many procedures, providing that the risks are fully understood. The general baseline data, intraoperative fluoroscopy times and operation time, bone cement injection volume, bone cement permeability, VAS score before operation, 1 day, and 3 months after operation, and the recovery of anterior vertebral height before and after operation were analyzed. Results. There was no statistically significant difference in the preoperative general data between the two groups. One day after operation, the VAS score of the experimental group was lower than that of the control group, but there was no difference after 3 months. The permeability of bone cement in the experimental group was lower than that in the control group, the height of anterior edge of injured vertebra was better than that in the control group, and the operation time was less than that in the control group. Conclusion. The daytime operation experimental group can significantly alleviate postoperative pain, increase the amount of bone cement injection, and reduce the permeability of bone cement through preoperative planning of puncture path and key puncture points, combined with advanced labor pain, but there is no significant difference in long-term pain relief.
Pillar-Based Cooperative Perception from Point Clouds for 6G-Enabled Cooperative Autonomous Vehicles
Authors: Wang Jian , Guo Xinyu , Wang Hongduo , Jiang Pin , Chen Tengyun , Sun Zemin
Published: July 2022

3D object detection is a significant aspect of the perception module in autonomous driving; however, with current technology, data sharing between vehicles and cloud servers for cooperative 3D object detection under the strict latency requirement is limited by the communication bandwidth. The sixth-generation (6G) networks have accelerated the transmission rate of the sensor data significantly with extreme low-latency and high-speed data transmission. However, which sensor data format and when to transmit it are still challenging. To address these issues, this study proposes a cooperative perception framework combined with a pillar-based encoder and Octomap-based compression at edges for connected autonomous vehicles to reduce the amount of missing detection in blind spots and further distances. This approach satisfies the constraints on the accuracy of the task perception and provides drivers or autonomous vehicles with sufficient reaction time by applying fixed encoders to learn a representation of point clouds (LiDAR sensor data). Extensive experiment results show that the proposed approach outperforms the previous cooperative perception schemes running at 30 Hz, and the accuracy of the object bounding box results in further distances (greater than 12 m). Furthermore, this approach achieves a lower total delay for the procession of the fusion data and the transmission of the cooperative perception message. To the best of our knowledge, this study is the first to introduce a pillar-based encoder and Octomap-based compression framework for cooperative perception between vehicles and edges in connected autonomous driving.
Detection and Function of Elastic Wave Tomography of Foundation Piles of High-Rise Buildings under the Background of Internet of Things
Authors: Guo Wannan , Liu Yang
Published: July 2022

Foundation piles are a widely used foundation form for high-rise buildings. Its main function is to reduce the settlement of buildings. In recent years, in areas with good upper soil conditions, in order to reduce the amount of earthwork excavation and transportation, more and more engineering buildings use foundation piles. Therefore, the status of foundation piles in construction projects is becoming more and more important. The high-rise building foundation pile project belongs to the underground concealed project. In the construction process, it is greatly affected by factors such as construction technology and geology. After the construction is completed, it is difficult to observe the changes inside the foundation pile with the naked eye as time goes by. A series of problems such as building collapse, settlement, and cracking often occur, thus affecting normal use and causing some safety accidents. In order to solve these series of problems, this paper proposes an elastic wave tomography detection method. It performs imaging inversion calculation on the inside of the foundation pile, and many methods are used in it. In the canonical Gaussian-damped Newton method in tomography, its iteration rate is 3.5% higher than that of the canonical Gaussian-Newton method, the convergence speed is accelerated, the accuracy is high, and the error is small. In the process of detection, this method is more suitable to detect the integrity and quality of foundation piles.
On Certain Properties of a Univalent Function Associated with Beta Function
Authors: Oluwayemi Matthew Olanrewaju , Olatunji Sunday Olufemi , Ogunlade Temitope O.
Published: July 2022

Beta function has some applications in differential equations and other areas of sciences and engineering where certain definite integrals are used. However, its applications to univalent functions have not been explored based on the available literature. In this work, therefore, the authors defined a univalent function associated with the beta function

B

m
,
n

with

m
,
n
>
0

. Some geometric properties of the function are discussed.
Nomenclature and taxonomy of Terarista fujiana (Diptera: Psilidae)
Authors: ZHOU JIALE , EVENHUIS NEAL L. , YANG DING
Published: July 2022

The nomenclature and taxonomy of Terarista fujiana Wang, 1999 are reviewed and discussed, resulting in the following new synonymy and new combination: Loxocera Meigen, 1803 s. str. = Terarista Yang & Wang, 2003, syn. nov.; L. (L.) fujiana (Wang, 1999), comb. nov. Terarista Wang, 1999 is treated as a nomen nudum.
Species of Nemoura (Plecoptera: Nemouridae) from Qinghai, China
Authors: YAN YANHUA , MA CUNXIN , YANG DING , LI WEIHAI
Published: July 2022

A new species of forest stonefly, Nemoura jixiangwangi Yang & Li, sp. nov., is described and compared with related taxa, based on specimens from the Qilian Mountain National Park, Qinghai Province, northwestern China. Nemoura geei Wu, 1929, Nemoura papilla Okamoto, 1922 and Nemoura securigera Klapálek, 1907 are recorded from the province and the mountain range for the first time.
Impact of Cloud-Base Turbulence on CCN Activation: CCN Distribution
Authors: Grabowski Wojciech W. , Thomas Lois , Kumar Bipin
Published: July 2022

Following our previous investigation of the turbulence impact on cloud-base single-size CCN activation, this study considers a similar problem assuming CCN size distribution obtained from field measurements. The total CNN concentration is taken as either 200 cm−3 to represent clean conditions, or as 2000 cm−3 to represent polluted conditions. CCN is assumed to be sodium chloride. The CCN activation in the rising nonturbulent adiabatic parcel is contrasted with the activation within a rising adiabatic parcel filled with inertial-range homogeneous isotropic turbulence. The turbulent parcel of 643 m3 and the turbulent kinetic energy dissipation rate of 10−3 m−2 s−3 are used in most of the simulations. Results for a range of mean parcel ascent rates, between 0.125 and 8 m s−1, are discussed. Overall, the adiabatic turbulent parcel simulations show results consistent with the adiabatic nonturbulent parcel, with higher activated CCN concentrations for stronger parcel ascent rates. The key difference is a blurriness of the separation between dry CCN size bins featuring activated and nonactivated (haze) CCN, especially for weak mean ascent rates. The blurriness comes from CCN getting activated and subsequently deactivated in the fluctuating supersaturation field, instead of all becoming cloud droplets above the cloud base. This leads to significantly larger spectral widths in turbulent parcel simulations compared to the nonturbulent parcel when activation is completed. Modeling results are discussed in the context of the impact of turbulent fluctuations on CCN activation documented in laboratory experiments using the Pi chamber.
The Role of Ocean Circulation in Southern Ocean Heat Uptake, Transport, and Storage Response to Quadrupled CO2
Authors: Li Qiuxian , Luo Yiyong , Lu Jian , Liu Fukai
Published: July 2022

In response to quadrupled CO2, the Southern Ocean primarily uptakes excess heat around 60°S, which is then redistributed by the northward ocean heat transport (OHT) and mostly stored in the ocean or released back to the atmosphere around 45°S. However, the relative roles of mean ocean circulation and ocean circulation change in the uptake and redistribution of heat in the Southern Ocean remain controversial. Here, a set of climate model experiments embedded with a novel partial coupling technique are used to separate the roles of mean ocean circulation (passive component) and ocean circulation change (active component). For the ocean heat uptake (OHU) response, the mean ocean circulation and ocean circulation change are of equal importance. The OHT response south of 50°S is mainly determined by mean ocean circulation, while the ocean circulation change generates an anomalous southward OHT north of 50°S. A heat budget analysis finds that the divergence of passive OHT acts to balance the passive surface heat gain to the south of ∼50°S, while the convergence of active OHT acts to balance the active surface heat loss to the north of ∼50°S. Intriguingly, all the increase in ocean heat storage (OHS) is attributable to the passive component, with the ocean circulation change playing almost no role. In the Southern Ocean, both the active and the passive ocean heat transports are overcompensated by the reverse atmospheric heat transport via the Bjerknes compensation.
The Estimation of the Total Freeboard of Arctic Sea Ice in Winter Using Passive Microwave Satellite Measurements
Authors: Kim Jong-Min , Sohn Byung-Ju , Lee Sang-Moo , Shi Hoyeon , Kwon Young-Joo , Kim Sang-Woo , Kim Hyun-Cheol
Published: July 2022

A method for estimating the total freeboard hf of the sea ice in the Arctic basin was developed in this study. To utilize the dielectric properties of microwave measurements on the sea ice freeboard, we adopted the spectral difference between the microwave frequencies (e.g., the gradient ratio). Satellite lidar altimetry data were utilized as a reference, and two pairs of gradient ratios [GR(36.5, 18.7) and GR(10.7, 6.9)] and an optional brightness temperature for first-year ice [that is, TBH(6.9)] were converted from passive microwave sensors into hf using the multiple linear regression equation. Using this method, we estimated hf without direct altimetry measurements. The developed method was evaluated using Operation IceBridge data and the relationship between the regressed hf and Operation IceBridge hf had a correlation coefficient R of 0.761 and a nearly unbiased (approximately −0.4 cm) pattern. Because passive microwave measurements are taken in the Arctic daily, the approach presented in this study has the potential to enable daily hf estimations for the Arctic.

Significance Statement

Arctic sea ice is one of the most critical indicators when monitoring climate change. Precise and continuous observations of sea ice thickness are essential to understand Arctic sea ice. This study attempts to estimate sea ice thickness using passive microwave satellite data. Passive microwave satellite observations are advantageous because of their wide spatial coverage and long-term records. Therefore, the suggested method in this study can be used for filling in gaps in coverage between sea ice thickness estimates from L-band radiometry and radar/lidar altimetry. The total freeboard is proportional to the thickness of sea ice, which is converted into thickness using the hydrostatic equation. The estimated total freeboard during two winter periods (2018/19 and 2019/20) demonstrates a plausible geographical distribution over the Arctic and indicates good agreement with airborne measurements.
The Impact of Nonzenith Elevation Angles on Ground-Based Infrared Thermodynamic Retrievals
Authors: Seo Jongjin , Wagner Timothy J. , Gero P. Jonathan , Turner David D.
Published: July 2022

Observing thermodynamic profiles within the planetary boundary layer is essential to understanding and predicting atmospheric phenomena because of the significant exchange of sensible and latent heat between the land and atmosphere within that layer. The Atmospheric Emitted Radiance Interferometer (AERI) is a ground-based infrared spectrometer used to obtain the vertical profiles of temperature and water vapor mixing ratio. Most AERIs are only capable of zenith views, although the Marine AERI (M-AERI) has a design that allows it to view various elevation angles. In this study, we quantify the improvement in the information content and accuracy of the retrieved profiles when nonzenith angles are included, as is common with microwave radiometer profilers. The impacts of the additional scan angles are quantified through both a synthetic study and with M-AERI observations from the ARM Cloud Aerosol Precipitation Experiment (ACAPEX) campaign. The simulation study shows that low elevation angles contain more information content for temperature whereas high elevation angles have more information content for water vapor. Outside of very humid environments, the addition of low elevation angles also results in lower root-mean-square errors when compared with high angles for both temperature and water vapor mixing ratio, although this is primarily a result of averaging multiple observations together to reduce instrument noise. Real-world results from the ACAPEX dataset indicate similar results as were found for the simulation study, although not all predicted benefits are realized because of the small sample size and observational uncertainties.
Features of MCSs in the Central United States Using Simulations of ERA5-Forced Convection-Permitting Climate Models
Authors: Hwang Yunsung , Li Zhenhua , Li Yanping
Published: July 2022

In this work, we characterized the occurrences and conditions before the initiations of mesoscale convective systems (MCSs) in the central United States, using 15 years of observations and convection-permitting climate model simulations. The variabilities of MCSs in summer were obtained using high-resolution (4 km) observation data [Stage-IV (stIV)] and ECMWF Re-Analysis v5 (ERA5)-forced Weather Research and Forecasting (WRF) Model simulations (E5RUN). MCSs were identified using the object tracking algorithm MODE-time domain (MTD). MTD-determined MCSs were divided into daytime short-lived MCSs (SLM12), daytime long-lived MCSs (LLM12), nighttime short-lived MCSs (SLM00), and nighttime long-lived MCSs (LLM00). E5RUN showed skill to simulate MCSs by obtaining similar statistics in occurrences, areal coverages, and propagation speeds compared to those of stIV. We calculated the 15 parameters using sounding data from E5RUN before an MCS was initiated (−1, −3, −6, and −9 h) at each location of an MCS. The parameters were tested to figure out the significance of predicting the longevities of MCSs. The key findings are 1) LLM12 showed favorable thermodynamic variables compared to that of SLM12 and 2) LLM00 showed significant conditions of vertically rotating winds and sheared environments that affect the longevity of MCSs. Moreover, storm-relative helicity of 0–3 km, precipitable water, and vertical wind shear of 0–6 km are the most significant parameters to determine the longevities of MCSs (both daytime and nighttime MCSs).

Significance Statement

The purpose of this study is to understand the features of mesoscale convective systems (MCSs) in observational data and convection-permitting climate model simulations. We tested long-term simulations using new forcing data (ERA5) to see the benefits and limitations. We designed a novel approach to obtain the distributions of meteorological parameters (instead of obtaining one value for one event of MCS) before initiations of MCSs to understand preconvective conditions (times from −9 to −1 h from initiation). We also divided MCSs into daytime/nighttime and short-/long-lived MCSs to help predict MCSs longevity considering the initiation times. Our results provide hints for the forecasters to predict MCS longevity based on preconvective conditions from parameters discussed in this work.
Ultraviolet Photodetector Based on Poly(3,4-Ethylenedioxyselenophene)/ZnO Core–Shell Nanorods p-n Heterojunction
Authors: Kadir Aygul , Jamal Ruxangul , Abdiryim Tursun , Liu Xiong , Zhang Hujun , Serkjan Nawrzhan , Zou Dongna , Liu Ya jun
Published: July 2022

In this work, we successfully assembled an organic–inorganic core–shell hybrid p-n heterojunction ultraviolet photodetector by the electropolymerization deposition of poly(3,4-ethylenedioxyselenophene) (PEDOS) on the surface of zinc oxide nanoarrays (ZnO NRs). The structures of composite were confirmed by FTIR, UV–Vis, XRD and XPS. Mott–Schottky analysis was used to study the p-n heterojunction structure. The photodetection properties of ZnO NRs/PEDOS heterojunction ultraviolet photodetector were systematically investigated current–voltage (I–V) and current–time (I–t) analysis under different bias voltages. The results showed that PEDOS films uniformly grew on ZnO NRs surface and core–shell structure was formed. The p-n heterojunction structure was formed with strong built-in electric field between ZnO NRs and PEDOS. Under the irradiation of UV light, the device showed a good rectification behavior. The responsivity, detection rate and the external quantum efficiency of the ultraviolet photodetector reached to 247.7 A/W, 3.41 × 1012 Jones and 84,000% at 2 V bias, respectively. The rise time (τr) and fall time (τf) of ZnO NRs/PEDOS UV photodetector were obviously shortened compared to ZnO UV photodetector. The results show that the introduction of PEDOS effectively improves the performance of the UV photodetector.