bluuebunny/crossref_metadata_2025 huggingface dataset:
Liderazgo en equipo y motivación ambiental en gestión administrativa universitaria.
Authors: Gómez Bernett Jenny Del Socorro , Bernal Payares Omaira
Published: March 2023

Con la presente investigación se desarrolla una teoría global que integra y describe la motivación ambiental, el liderazgo en equipo y la gestión administrativa de las universidades públicas.  Se trata de promover la importancia de incitar e institucionalizar una conducta ambiental adecuada en los estamentos universitarios reconociendo el liderazgo en equipo, la motivación ambiental y la gestión académico administrativa como herramienta fundamental para lograrlo.  La investigación tiene lugar en la Universidad de Cartagena, en el período 2011-2013, en una muestra estratificada (docentes de planta, docentes de cátedra, trabajador contratista, trabajador de planta y estudiantes) con un total 378 personas.  Los resultados de esta investigación serán relevancia para el  desarrollo del Plan Institucional de Gestión Ambiental Universitario. El análisis de los resultados muestra que las universidades en cumplimiento de la responsabilidad social ambiental, de su misión y su visión  deben aplicar y liderar estrategias que permitan mejorar significativamente el comportamiento y la conciencia ambiental de la sociedad universitaria ya que estos dos factores constituyen una deficiencia determinante en la armonización del liderazgo en equipo, motivación ambiental universitaria y la  gestión administrativa.
Utilización del mercado de capitales por las pymes exportadoras de Barranquilla
Authors: Lechuga Cardozo Jorge Isaac , Muñoz Querales Edgardo Enrique
Published: March 2023

El presente artículo es producto de una investigación, cuyo objetivo consistió en analizar los productos del mercado de capitales más utilizados por las pymes exportadoras en la ciudad de Barranquilla, se aplicó el método  descriptivo, con la técnica de investigación la encuesta, a una muestra estratificada de 45empresas. El tipo de investigación es cuantitativo y para el abordaje de la investigación, se realizó una revisión documental de la situación  de las pequeñas y medianas empresas exportadoras en el entorno local así como también, un estudio para conocer el grado de utilización que tienen dichas empresas de los productos del mercado de capitales, identificando el beneficio que tienen las PYMES al utilizar de forma eficiente los títulos valores ofrecidos por el sector financiero. Se concluyó que existe una baja participación en  el consumo de productos del mercado de capitales de las Pymes exportadoras con un efecto negativo en las actividades del sector exportador, particularmente en la ciudad de Barranquilla, que impactan en los resultados económicos del país y la región.
Estrategias y acciones del bajo desempeño académico en la CURN
Authors: Bernal Payares Omaira , Cifuentes Cifuente Omar , Yances Cordoba Lorenzo
Published: March 2023

La presente investigación se centró en analizar el desempeño académico, en aquellos estudiantes que no han podido alcanzar los niveles mínimos exigidos. El desempeño académico es explicado por variables como: hábitos, métodos, técnicas de estudio y aptitud.

El bajo desempeño académico es un nivel en que un estudiante se encuentra cuando obtiene un promedio inferior a 3.0 sobre 5.0 y es ocasionado por dificultades de aprendizaje, malos hábitos, ausencia de técnicas y métodos de estudio y deficiencias en algunas áreas principalmente en la cuántica y en lecto-escritura.

Por lo anteriormente expuesto, hace necesario adelantar una investigación que permita conocer esta situación y a partir de allí, proponer las estrategias y acciones para superar esta situación y mostrar su compromiso con la calidad académica, del Programa de Administración de Empresas de la Corporación Universitaria Rafael Núñéz 1P2012.
Implicaciones de la espiritualidad en las organizaciones vivas modernas
Authors: Jiménez Rodríguez Luis Alfredo , Gamboa Suarez Ramiro , Vargas Ortegon Rene
Published: March 2023

Existen estudios que revelan que lo que los colaboradores desean más en sus trabajos es un sentimiento de amor y de cuidado y alguna conexión entre su trabajo y su propósito mayor en la vida. Según los individuos se preguntan el significado de la vida y abrazan el desarrollo de sus “yo” internos, así las corporaciones y organizaciones también lo hacen. Éstas perciben que sus empleados están disfrutando colectivamente de una moral alta en el trabajo; individualmente se ven más felices; encuentran mayor motivación y recompensa personal en su trabajo; y son más efectivos y productivos.

Por consiguiente, el propósito del  estudio fue investigar cómo los empresarios y altos ejecutivos definen el rol de la espiritualidad en la administración de empresas, cómo la aplican en su cotidianidad en su trabajo y cuáles son los factores que le dan significado y propósito al mismo.
El currículo universitario venezolano. Análisis epistemológico y ontológico de la formación docente
Authors: Florez Villamizar Isleyda
Published: March 2023

El presente estudio atiende a una revisión documental encaminada al establecimiento de un análisis sistemático del currículo venezolano, para ello, se asumió como norte en principio el análisis epistemológico del currículo universitario, haciendo énfasis del mismo a nivel general, para posteriormente ubicarlo dentro de la universidad y cerrar dicho análisis con el currículo de formación docente. Seguidamente se contempla el análisis y la interpretación de eventos de orden ontológico que caracterizan el currículo de formación docente, para lo cual se asumió el desarrollo curricular desde la perspectiva de la Universidad Pedagógica Experimental Libertador, se contemplaron las evidencias actuales de la administración curricular dentro de esta universidad formadora de docentes, para luego referir el proceso de transformación curricular que se adelanta en la actualidad dentro de esta casa de estudios. El artículo se cierra con una serie de consideraciones finales que se generan de la interpretación de los elementos previamente mencionados.
Pedagogy transdisciplinary a necessity in times of uncertainty
Authors: Flórez Villamizar Libardo
Published: March 2023

La sociedad en los últimos tiempos se caracteriza por enfrentarse diariamente a cambios, transformaciones, adelantos e innovaciones; que de una u otra manera impactan en el hombre y en cada uno de los sectores que conforman el entramado social. De allí, el interés de reflexionar sobre un aspecto fundamental del cual se desprende un cúmulo de elementos que pudiesen generar aportes para un desarrollo significativo en la sociedad; como lo es la Pedagogía Transdisciplinaria con una mirada amplia, profunda y epistémica que sea la base de una educación que entienda y comprenda la dinámica actual que sirva para preparar y formar a los hombres y mujeres del futuro que se puedan desenvolver con éxito en tiempos donde la incertidumbre se apodera de la humanidad y el conocimiento se enfrenta a nuevos estilos de pensamientos y a un repensar ajustado a las exigencias del hombre contemporáneo.
El sector informal en la economía mexicana: factor clave para fomentar el desarrollo económico post covid 19
Authors: Pérez - Pérez Isabel
Published: March 2023

En México, la Pandemia de la COVID 19, afectó considerablemente la economía del centro, norte y sur del país. En el sur, por ser la zona más pobre, con mayor rezago educativo y bajo empleo, incrementó más éste, agravándose con el paro total de las actividades comerciales de la venta de alimentos en establecimientos fijos e itinerantes por Decreto Presidencial y por la emergencia sanitaria de salud. Por ello, nuestro objetivo fue analizar la economía del sector informal en negocios establecidos de Tonalá, Chiapas identificando causas, consecuencias y propuestas de posibles soluciones para su reactivación. Destacando que se realizó una investigación, cualitativa y cuantitativa-descriptiva, diseñándose una encuesta semiestructurada, que se aplicó a una muestra representativa de 50 dueños/propietarios; siguiendo todos los protocolos de seguridad y sanitarios.
Liderazgo, personalidad y competencias digitales y su relación con la productividad
Authors: Chávez - Plascencia Iris Yoloxochilt Deyanira , Ávalos - Pelayo Rafael
Published: March 2023

El beneficio derivado de la culminación de la presente investigación consiste en la identificación de los factores del liderazgo y de la personalidad que faciliten a los docentes el fortalecimiento y/o adquisición de las competencias digitales necesarias ante la implementación de modelos híbridos de enseñanza, los cuales se estiman como el principal hecho decisivo del proceso formativo, no solamente al nivel de licenciatura, sino para otros niveles educativos. Importante destacar que es un estudio en curso, por tanto, es un primer acercamiento, desarrollado como un modelo preliminar, en el cual se propone una relación entre las variables involucradas, determinándose de primeras impresiones que la 4ta revolución industrial ha incentivado una rápida transformación de los modelos de negocio, donde las competencias de los trabajadores deben ampliarse al cubrimiento de las áreas digitales.
Desarrollo urbano de la ciudad de Bucaramanga en su proyección a Smart City
Authors: Prieto - Cuentas Narcy Carolina , Therán - Barajas Carmen Elisa
Published: March 2023

La presente investigación en curso, busca identificar los principios básicos en los que se fundamenta el desarrollo urbano en su proyección a Smart City, a partir de una revisión de literatura y planes de desarrollo, para el establecimiento de los aspectos, que aportan a un modelo de territorio inteligente en Bucaramanga, desde el análisis bibliométrico  y la visión del sector público frente al cumplimiento de planes de desarrollo, teniendo en cuenta, lo económico, lo social y lo sustentable, de forma que se llegue a la transformación de Bucaramanga en Smart City a partir del panorama real de competitividad del municipio.
Eficiencia económica de la economía circular, en el sector de construcción colombiano
Authors: Colmenares Harold Andrés , Paredes Nahúm Emiro , Chicacausa Cristian Felipe
Published: March 2023

El sector de construcción en su favorable aporte a la modernización y a la economía del país, hace uso de materias primas altamente contaminantes, las cuales al ser desechadas al final de su ciclo generan un alto impacto sobre el ambiente, por tal motivo el objeto de esta investigación se centró en la recuperación y reinserción de dichos residuos a la economía. Por tal motivo, se analizó la eficiencia económica que presentaban los modelos de la economía circular frente al sector de construcción en Colombia. Este proyecto se realizó con un tipo de investigación con enfoque cualitativo, con un alcance descriptivo. El tipo de investigación en el que se en marco el diseño metodológico fue una investigación acción, como técnica se implementó una revisión documental, donde los informes estadísticos y de sostenibilidad del sector de construcción hicieron parte de la información utilizada. Como resultado de la investigación se logró inicialmente identificar los modelos de la economía circular aplicados en el sector de construcción. Así mismo, se pudo analizar el impacto económico-ambiental de estos. Finalmente, se determinó la viabilidad de la utilización de los modelos de la economía circular en el sector de construcción. Concluyendo que la economía circular es una estrategia que permite abordar los nuevos retos a los que enfrenta el sector de construcción en Colombia.
Competencias investigativas en los estudiantes de Administración de Empresas, universidades públicas
Authors: Vera - Pirela Carlos Alberto , Galvis - Núñez Carmen Cecilia
Published: March 2023

La siguiente investigación tiene como finalidad revisar el estado de las competencias estudiantiles y actitud investigativa de los estudiantes de Administración de empresas de la universidad Popular del Cesar. Debido a su importancia y atención por cuanto deja al descubierto las ventajas competitivas y las falencias de los futuros profesionales de esta área en su perfil de egreso de la universidad. Es necesario señalar que las competencias investigativas en este tipo de profesionales los proyectan al éxito de su carrera por cuanto les facilita su accionar en su vida profesional; esta investigación tiene como objetivo analizar el estado de las competencias investigativas en estudiantes de administración de empresas de la universidad Popular del Cesar, donde se involucran las competencias técnico-instrumentales y la actitud investigativa aportada por los estudiantes del Programa. Esta investigación se tipificó como descriptiva no experimental transaccional y de campo con un enfoque paradigmático cuantitativo; la técnica utilizada para la recolección de datos fue una encuesta en la cual se formuló una serie de ítems dirigidas a estos estudiantes de la Universidad Popular del Cesar, se realizó la prueba piloto a otra universidad pública arrojando un resultado de 0.92 lo cual señala que es confiable el instrumento. Se tomó posteriormente la muestra de naturaleza opinática de una población de 49 estudiantes de los grupos de Proyecto de Grado del 8vo semestre.  los resultados obtenidos demostraron falencias en estado de las competencias técnico-instrumental y competencias investigativas, aunque la actitud investigativa también se mostró con debilidades. A manera de aporte final se debe enfatizar en las características de la actitud investigativa y el perfil de competencias investigativa que son parte fundamental en la vida de los futuros profesionales
The role of the UNCITRAL rules on transparency in enforcing societal control over investment treaties
Authors: Al-Enizi Ziad Kh.
Published: March 2023

In order to improve the transparency principle in the arbitral process of the investment treaties, and to enable the public to know how the arbitration case proceeds, the United Nations Commission on International Trade Law (UNCITRAL), adopted, at its 46th session (8–26th of July 2013), the UNCITRAL Rules on Transparency in Treaty-Based Investor-State (UNCITRAL, 2014). This raises an important question about the extent to which these rules contribute to strengthening public oversight over arbitration processes. The study assesses these rules through the analytical method, by analyzing those rules, and clarifying the extent of their contribution to expanding the scope of public control over arbitration processes. The study shows that the basic principle in determining confidential or protected information that is withheld from the public and excluded from transparency is the consent of the treaty parties. Whenever the treaty parties agree to consider certain information as confidential, it is considered so and it may not be made available to the public. The study recommends expanding the scope of transparency by granting the arbitral tribunal the right to decide, after consulting with the arbitrating parties, that certain documents or information are confidential or protected.
Reopening the “CANCER MOONSHOT” in the United States: A great task in the COVID-19 era
Authors: Hu Chunsong
Published: March 2023

Cancer is currently a leading cause of mortality in the globe,
particularly in the COVID-19 era, due to not enough and not in time care
and treatment as well as limited coverage of COVID-19 vaccination. This
article briefly discusses the reopening of the “CANCER MOONSHOT” in
the United States (US). It’s time for conduction of novel strategies
such as the iRT-ABCDEFG and web-based programs for prevention and
management of cancer, and further deepen cooperation between China and
the US so as to combat cancer and save more lives. In conclusion, as a
huge biomedical engineering, the reopening of “CANCER MOONSHOT” is a
great task with a special significance and value in the field of cancer
prevention and treatment in the COVID-19 era.
Runoff response to changes in climate, vegetation cover, construction of terraces and check-dams, and urban expansion in the middle Yellow River
Authors: Xue Lianqing , Yang Mingjie , Liu Yuanhong , Wang Wenzhuang , Han Qiang , Liu Saihua
Published: March 2023

Understanding the controlling factors of spatial and temporal changes in
runoff is critical for the integrated management and utilization of
water resources. This study used the stepwise regression analysis to
determine the expressions of eight regional controlling parameters and
their climate and human factors in the middle Yellow River (MYR) based
on the Budyko framework of the Fu equation. The contribution rate of
climate and human factors to runoff change was analyzed using the
elastic coefficient. The results showed that climate change caused
runoff increase, and comprehensive human activities played an important
role in runoff reduction. Human factors affecting runoff varied greatly
in different regions. Vegetation restoration could lead to runoff
reduction while constructing terraces and check-dams could cause an
increase in runoff. Urban expansion contributed to runoff collection,
and its contribution rate to runoff change was more than 200% in
absolute value. The runoff change in the arid and semi-arid regions in
the north was more sensitive to human factors.
Latitudinal gradient and species traits determine bat distributions across Europe
Authors: Meramo Katarina , Kotila Miika , Gaultier Simon , Lundberg Piia , Suutari Miina , Ovaskainen Otso , Lilley Thomas
Published: March 2023

Climatic and human impacts have determined the extinction of species in
the past and are also the main factors shaping their present
distribution ranges. Geographic range size – a biogeographic variable
commonly used to assess population abundance, survival, and conservation
status – varies with latitude. In mammals, according to Rapoport’s
rule, range size typically increases with latitude. However, bats differ
from other groups of mammals with regards to numerous morphological,
physiological, and behavioral adaptations of sensory and motor systems.
Nevertheless, bats are a suitable group for evaluating the rule because
they show a strong latitudinal gradient in species richness. Our aim was
to investigate the distribution patterns of European bat fauna based on
two biogeographic variables 1) geographical range size and 2) average
latitude of their distribution range, and investigate whether species
traits characteristic to bats, mobility and hibernation, are associated
with variation in range size and latitudinal distribution. We collected
geographical data and species trait data on 45 European bat species from
the literature. We discovered that range size and average latitude of
distribution range follows Rapoport’s rule to a high degree in bats.
Additionally, traits related to hibernation and mobility behavior, more
specifically hibernation breadth and dispersal ability, are associated
with large distribution ranges and could affect northerly ranges in
European bats. The range size does not only assist in directing
conservation of threatened species, but it also provides insights into
fundamental processes such as dispersal and adaptation. Our results
emphasize that knowledge on the relationship between traits and species
distribution is important for understanding current distribution
patterns and could work as background information for predictive models
on the effect of future landscape changes.
Application of sample displacement batch chromatography for fractionation of proteoforms
Authors: Hidayah Siti Nurul , Gaikwad Manasi , Biabani Ali , Nissen Paula , Siebels Bente , Voß Hannah , Riedner Maria , Schlüter Hartmut
Published: March 2023

Fractionation of proteoforms is currently the most challenging topic in
the field of protein purification. The need for considering the
existence of proteoforms into experimental approaches is not only
important in Life Science research in general but especially in the
manufacturing of therapeutic proteins (TPs) like recombinant therapeutic
antibodies (mAbs). Some of the proteoforms of TPs have significantly
decreased actions or even cause side effects. The identification and
removal of proteoforms differing from the main species, having the
desired action, is challenging because the difference in the composition
of atoms often is very small and their concentration in comparison to
the main proteoform can be small. In this study we demonstrate that
sample displacement batch chromatography (SDBC) is an easy to handle,
economic and efficient method for fractionating proteoforms. As a model
sample a commercial ovalbumin fraction was used, containing many
ovalbumin proteoforms. The most promising parameters for the SDBC were
determined by a screening approach and applied for a 10-segment
fractionation of the ovalbumin with cation exchange chromatography
resin. Mass spectrometry of intact proteoforms was used for
characterizing the SDBC fractionation process. By SDBC a significant
separation of different proteoforms was obtained.
When to make partners in the city: phosphorous enrichment disrupt the partnership between the invasive herb Ruellia nudiflora (Acanthaceae) and arbuscular mycorrhizal fungi in a tropical urban environment.
Authors: Méndez Diego , Ramos-Zapata Jose , Estrada-Medina Héctor , Carmona Diego
Published: March 2023

The mutualistic relationship between plants and arbuscular mycorrhizal
fungi (AMF) is essential for optimal plant nutrition, enabling the plant
to better withstand biotic and abiotic stressors and enhancing its
chances of survival, reproduction, and colonization of new environments.
Urban soil nutrient enrichment may reduce the benefits of AMF for plant
nutrition, potentially reducing interaction with AMF in urban
environments. Here, we test this prediction by studying how urbanization
alter the plant-AMF interaction between the invasive herb Ruellia
nudiflora (Acanthaceae) and AMF in Mérida city. We collected soil and
plants from deep urban sites (DUS; e.g. sidewalks), open urban sites
(OUS; parks), and rural sites (RS) to analyze the soil nutrient content,
plant morphology, AMF-colonization rates, spore density, richness, and
diversity. Unexpectedly, DUS showed the lowest soil nutrient
concentrations except for phosphorus. Higher phosphorus levels in these
sites reduced AMF colonization, supporting the prediction of reduced
plant-AMF interactions in urban environments. We discovered that
potassium affects the plant-AMF association, an understudied effect.
Finally, urban plants produced smaller and more compact roots than rural
plants, and no differences on AMF communities were found between urban
and rural environments. To gain a better understanding of how AMF
contributes to plant colonization in urban environments, further studies
are required.
Subsequent fertility, pregnancy, gynaecological and psychological outcomes after maternal-fetal surgery for open spina bifida: a prospective cohort study
Authors: Haenen Kobe , Vergote Simen , Kunpalin Yada , Catte Luc De , Devlieger Roland , Lewi Liesbeth , Merwe Johannes Van der , Russo Francesca , Vloo Philippe De , Lannoo Lore , Deprest Jan
Published: March 2023

Objective: To determine the long-term maternal impact of open
fetal spina bifida repair. Design: Prospective cohort study.
Setting: University Hospitals Leuven, Belgium. Population:
Hundred consecutive mothers who had open maternal-fetal spina bifida
repair between 2012-2022. Methods: A patient-reported survey on
subsequent fertility, pregnancy, gynaecological and psychological
outcomes. Main Outcome Measures: Complications during subsequent
pregnancies, gynaecological and psychological problems. Results:
Seventy-two out of 100 invited women completed the questionnaire (72%).
Despite being advised not to, 7/13 of women attempting to conceive, did
so within two years after fetal surgery and one delivered vaginally. Two
of the 16 subsequent pregnancies were complicated by an open neural tube
defect. One pregnancy was complicated by a placenta accreta, and one by
a uterine rupture, both with good neonatal outcome. Nearly half of
respondents who did not attempt to conceive, reported that this was due
to the experience during the index pregnancy and care for the index
child. Three out of four respondents reported long-term psychological
problems, mostly anxiety for the health of the index child, fear for
recurrence in subsequent pregnancies and feelings of guilt.
Conclusions: Open maternal-fetal surgery for spina bifida did not
appear to affect fertility in our cohort. Half of the attempts to
conceive took place within two years. One uterine rupture and one
placenta accreta occurred in 16 subsequent pregnancies. Most respondents
reported psychological problems linked to the index pregnancy, which
reinforces the need for long-term psychological support. Funding:
Great Ormond Street Hospital Children’s Charity, FWO-Flanders, Klinisch
Onderzoeksfonds UZ Leuven.
Coconut oil and enriched environment: effects on memory in nourished and overnourished rats
Authors: Tavares Maryane Gabriela , Silva Débora de Cássia da , Benevides Regina de Deus , Simões Camila , Hornsby Manuella , Amancio-dos-Santos Angela
Published: March 2023

Background: Postnatal overnutrition has been associated with lasting
impairment of cognitive function. On the other hand, virgin coconut oil
(CO) and environmental enrichment (EE) have been associated with the
improvement of memory function. Objectives: To evaluate whether CO and
EE could counteract any possible memory impairment caused by
overnutrition during rats’ postnatal period. Methods: Rats were suckled
in litters of either 9 (N, nourished) or 3 (ON, overnourished) pups. At
7 to 30 days of life, N and ON animals were treated with CO (10 ml/kg/d)
or vehicle (V). At 36 days old, rats were exposed to EE during a 4-week
period. Recognition memory was investigated in young and adult groups to
evaluate rats’ memory after CO supplementation period and after exposure
to an EE, respectively. Lastly, murinometric evaluation and blood
collection were performed. Results: ON young rats displayed a
treatment-dependent impairment of memory (p < 0.001).
Additionally, CO coupled with overnutrition had age-dependent effects on
memory. At adulthood, CO&ON rats were not able to recognize novel
object placement (novel versus familiar, p > 0.05);
however, CO&ON rats that were exposed to EE performed this task
successfully (p < 0.0001). Conclusions: The etiology of
diseases characterized by memory impairment can date back to lactation.
Nutrition during this critical period can influence cognitive function.
Early-life overnutrition, coupled with CO, has age-dependent effects on
recognition memory. Our data suggests EE can rescue the memory
impairment found in CO&ON adult rats.
Ultrastructural Analysis of Nigrostriatal Dopaminergic Terminals in a Knockin Mouse Model of DYT1 Dystonia
Authors: Pan Ke , Jinnah Hyder , Hess Ellen , Smith Yoland , Villalba Rosa
Published: March 2023

DYT1 dystonia is a form of generalized dystonia associated with
abnormalities in striatal dopamine release in mouse models and likely in
humans. In the present study, we examined the possibility that
ultrastructural changes in the morphology of nigrostriatal dopamine
terminals could contribute to this neurochemical imbalance using a
Serial-Block Face/Scanning Electron Microscope (SBF/SEM) and
three-dimensional reconstruction approach to analyze striatal tyrosine
hydroxylase-immunoreactive (TH-IR) terminals and their synapses in a
DYT1(ΔE) Knockin (DYT1-KI) mouse model of DYT1 dystonia. Furthermore, to
study possible changes in vesicle packaging capacity of dopamine, we
used transmission electron microscopy to assess possible changes in the
size of synaptic vesicles in striatal dopamine terminals between wild
type (WT) and the DYT1-KI mice. Quantitative analysis of 80 fully
reconstructed TH-IR terminals in the WT and DYT1-KI mice indicate: 1) No
significant difference in the volume of TH-IR terminals between WT and
DYT1-KI mice, 2) No major change in the proportion of axo-spinous vs
axo-dendritic synapses formed by TH-IR terminals between the two groups,
3) No significant change in the post-synaptic density (PSD) area of
axo-dendritic synapses, while the PSDs of axo-spinous synapses were
significantly smaller in DYT1-KI mice, 4) No significant difference in
the mean volume of mitochondria between WT mice and 5) No significant
difference in the surface area of synaptic vesicles between the two
groups. Altogether, these findings suggest that abnormal morphometric
changes of nigrostriatal dopamine terminals and their post-synaptic
targets are unlikely to be a major source of reduced striatal dopamine
release in DYT1 dystonia.
Optimising the automated recognition of individual animals to support population monitoring
Authors: Lorm Tijmen de , Horswill Catharine , Rabaiotti Daniella , Ewers Robert , Groom Rosemary , Watermeyer Jessica , Woodroffe Rosie
Published: March 2023

Reliable estimates of population size and demographic rates are central
to assessing the status of threatened species. However, obtaining
individual-based demographic rates requires long-term data, which is
often costly and difficult to collect. Photographic data offer an
inexpensive, non-invasive method for individual-based monitoring of
species with unique markings, and could therefore increase available
demographic data for many species. However, selecting suitable images
and identifying individuals from photographic catalogues is
prohibitively time-consuming. Automated identification software can
significantly speed up this process. Nevertheless, automated methods for
selecting suitable images are lacking, as are studies comparing the
performance of the most prominent identification software packages. In
this study, we develop a framework that automatically selects images
suitable for individual identification, and compare the performance of
three commonly used identification software packages; Hotspotter,
I3S-Pattern, and WildID. As a case study, we consider the African wild
dog Lycaon pictus, a species whose conservation is limited by a lack of
cost-effective large-scale monitoring. To evaluate intra-specific
variation in the performance of software packages, we compare
identification accuracy between two populations (in Kenya and Zimbabwe)
that have markedly different coat colouration patterns. The process of
selecting suitable images was automated using Convolutional Neural Nets
that crop individuals from images, filter out unsuitable images,
separate left and right flanks, and remove image backgrounds. Hotspotter
had the highest image-matching accuracy for both populations. However,
the accuracy was significantly lower for the Kenyan population (62%),
compared to the Zimbabwean population (88%). Our automated image
pre-processing has immediate application for expanding monitoring based
on image-matching. However, the difference in accuracy between
populations highlights that population-specific detection rates are
likely and may influence certainty in derived statistics. For species
such as the African wild dog, where monitoring is both challenging and
expensive, automated individual recognition could greatly expand and
expedite conservation efforts.
Finite Element Analysis of Time-Fractional Integro-differential Equation of Kirchhoff type for Non-homogeneous Materials
Authors: Sreenadh K , Kumar Lalit , Sista Sivaji Ganesh
Published: March 2023

In this paper, we study a time-fractional initial-boundary value problem
of Kirchhoff type involving memory term for non-homogeneous materials (
P α ). As a consequence of energy argument, we derive L ∞ ( 0 , T ; H 0
1 ( Ω ) ) bound as well as L 2 ( 0 , T ; H 2 ( Ω ) ) bound on the
solution of the problem ( P α ) by defining two new discrete Laplacian
operators. Using these a priori bounds, existence and uniqueness of the
weak solution to the considered problem is established. Further, we
study semi discrete formulation of the problem ( P α ) by discretizing
the space domain using a conforming FEM and keeping the time variable
continuous. The semi discrete error analysis is carried out by modifying
the standard Ritz-Volterra projection operator in such a way that it
reduces the complexities arising from the Kichhoff type nonlinearity.
Finally, we develop a new linearized L1 Galerkin FEM to obtain numerical
solution of the problem ( P α ) with a convergence rate of O ( h + k 2 −
α ) , where α (0 1) is the fractional derivative exponent,
h and k are the discretization parameters in the space and time
directions respectively. This convergence rate is improved to second
order in the time direction by proposing a novel linearized L2-1
Galerkin FEM. We conduct a numerical experiment to
validate our theoretical claims.
Fault Estimation And Tolerant Anti-disturbance Switching Control for Switched Systems with Its Application to Circuit Systems
Authors: Zhao Ying , Liu Xiaohui , Li Pengyuan , ma dan
Published: March 2023

This study proposes a fault estimation and tolerant anti-disturbance
switching control (ADSC) approach for the switched systems subject to
the system fault and multiple disturbances. The fault dose not required
to have a model.The disturbances contain the modeled unmeasurable part
and the unmodeled measurable part. First, a composite switching
estimator is constructed to simultaneously estimate the unavailable
system state, fault and modeled disturbance. Then, by means of the
estimator, a switching controller is developed to tolerant the fault and
complement the modeled disturbance. Further, under the dwell time
relevant switching signals, criteria are established to ensure the fault
estimation performance and robustness property for the switched systems.
Finally, via implementing the presented fault estimation and tolerant
ADSC scheme on a switched circuit system to regulate the charge and
flux, the reasonability of the established result is verified.
Clinical characteristics of infants with Omicron variant of SARS-CoV-2 in Henan, 2022
Authors: Liu，MD Yuemei , Liu Jinhui , Wang Hongling , Tang Yu , Shen Yuelin
Published: March 2023

Objective: To describe the clinical characteristics of Covid-19 in
infants during the Omicron variant outbreak in Henan, 2022. Methods: We
retrospectively analyzed the clinical data, epidemiological exposure,
and maternal vaccination status of infants infected with Omicron variant
admitted to Zhengzhou First People’s Hospital from October 20, 2022 to
December 15, 2022. Results: We admitted 21 infants (12 males and 9
females). All had epidemiological exposure in household or nursing
institution settings. The most common respiratory manifestations were
fever (19 cases), cough (11 cases), and nasal congestion (8 cases). The
most frequent gastrointestinal manifestations were anorexia and diarrhea
(8 cases each) and vomiting (4 cases). Of the 12 infants who underwent
complete blood count, 8 had normal white blood cell counts and 3 had
leukopenia. C-reactive protein was normal in 11 cases and mildly
elevated in 1 case. Chest CT showed increased lung markings in 7 cases,
focal consolidation in 6 cases each, and ground-glass opacities in 5
cases. The mean time to negative conversion was 6.7 days. All 21 infants
recovered and were discharged after symptomatic treatment, with a mean
length of stay of 11.5 days. Two weeks after discharge, none had
recurrence or retested positive for SARS-CoV-2 RNA. We found no
correlations between maternal vaccination status and clinical symptoms
or SARS-CoV-2 RNA negative conversion time (P>0.05).
Conclusion: All Covid-19 infants had epidemiological exposure in
household or nursing institution settings. They mostly had mild
infection with respiratory and/or gastrointestinal symptoms and a good
short-term prognosis.
Supramolecular Surface Engineering of Carbon Dots enables Matrix-free Room Temperature Phosphorescence
Authors: Zhang Tao , Wu Xiaoyan , Liu Lele , Yang Yuxiang , Zhuang Jialuo , Li Zijian , Bi Hong
Published: March 2023

Carbon dots (CDs) are an emerging class of nanomaterials with intriguing
photophysical properties. Recently, achieving room-temperature
phosphores-cence (RTP) for CDs have attracted considerable attention for
biomedical and information applications. However, the CDs based RTP
materials generally require the use of polymeric and inorganic matrix to
provide the rigid environments, which remains a great challenge to
obtain matrix-free CDs with RTP. Herein, a novel supramolecular strategy
based on strong interparticle interactions has been developed to attain
this objective, by covalent decoration of ureido-pyrimidinone (UPy, a
multiple hydrogen bonding unit) on the surface of CDs. Structural
characterizations validated the core-shell structure of the as-prepared
CDs (EDTA-CDs) and demonstrated the successful attachment of UPy via
post-modification (UPy-CDs). The presence of UPy recognition units
render the strong hydrogen bonding between UPy-CDs, which stabilizes the
triplet state via rigidifying effect. As a result, UPy-CDs exhibit
matrix-free efficient RTP (λem = 534 nm) with high brightness and long
lifetime (33.6 ms) in the solid state. Owing to the dual-emission
character, we further explored the application potential of UPy-CDs in
information encryption and anti-counterfeiting. Overall, this work
provides a new and facile strategy for achieving matrix-free
phosphorescent CDs with elegant incorporation of supramolecular
chemistry.
A case of radiofrequency catheter ablation reverses atrial tachycardia-induced cardiomyopathy induced by circadian rhythm disturbances
Authors: Shi Yanxi , Zhu Ye , Gu Xiang
Published: March 2023

A 16-year-old male patient was admitted to the emergency department
because of “continuous palpitations and shortness of breath”. He
developed cardiogenic shock, electrocardiogram (ECG) showed persistent
atrial tachycardia (AT), left ventricle was enlarged, the lowest left
ventricular ejection fraction (LVEF) was only 19%, the highest
N-terminal-forebrain natriuretic peptide was 5830pg/ml. He was treated
with extracorporeal membrane oxygenation-based comprehensive treatment,
but various antiarrhythmic drugs were no therapeutic effective.
Considering he was atrial tachycardia-induced cardiomyopathy (TIC) with
heart failure induced by circadian rhythm disturbance, we performed
radiofrequency catheter ablation and adjust his work-and-rest system. AT
was terminated after ablation. Three months after the operation, there
was no recurrence of palpitations, ECG showed normal, LV function and
heart size recovered. This report describes a case of atrial TIC
associated with systolic dysfunction treated with RFCA successfully. In
the future, we should pay more attention to changes in the circadian
rhythm of atrial arrhythmia which may help clinical diagnosis and
treatment.
A Quality Assurance Audit of an Orthoptic-Led Virtual Neuro-Ophthalmology Clinic

Authors: Smith Joe , Hirst Nicola , Yagan Ali
Published: March 2023

Introduction: Neuro-ophthalmology is experiencing increasing demand. There is a lack of literature relating to how we deal with the capacity and demand issues, and the use of virtual clinics. Virtual clinics are well-recognised in other subspecialties to help deal with capacity and demand issues, with reports of non-medical-led clinics, and are supported by the National Health Services Long Term Plan and People Plan. We present a quality assurance audit of our orthoptic-led neuro-ophthalmology virtual clinic.
Methods: The virtual clinic was developed in October 2014 to help deal with capacity and demand issues, however, only since 2019 have orthoptists been trained to virtually review. This paper provides a summary of a quality assurance audit that was completed to determine concurrence between orthoptic and consultant virtual reviews.
Results: From January to August 2021, all patients attending the virtual clinic were reviewed by a trained orthoptist and then audited for concordance by a consultant neuro-ophthalmologist; 163 patients were identified. There was 100% agreement between orthoptic reviewers and consultants regarding visual function status and optical coherence tomography interpretation. Of the patients reviewed, 100% of patients were satisfied and 96% of patients would be happy to be seen in the virtual clinic again.
Conclusions: Current demands on the neuro-ophthalmology speciality mean that we need to explore new ways of working. Our outcomes demonstrate a high level of agreement between orthoptists and ophthalmologists, and excellent patient satisfaction results. We hope this highlights where orthoptists can play an invaluable role in the care of neuro-ophthalmic patients and help deal with capacity and demand issues.
Design of allpass-based IIR multi-notch filters with identical pole radiuses
Authors: Krstic Ivan
Published: March 2023

A design method for the allpass-based infinite impulse response multi-notch
filters with identical pole radiuses is derived in the paper. According to
the standard procedure when design of the allpass-based filters is
considered, the multi-notch filters? magnitude response specifications are
first formulated as the phase response specifications of the corresponding
allpass filter. Then, for the specified identical pole radiuses, it is shown
that unknown allpass filter coefficients can be obtained determined from the
square system of linear equations. On the other hand, the minimum value of
the pole radius, such that specifications of the the magnitude response are
satisfied in all passbands, can be determined using the bisection method.
Results of comparison with some of the existing design methods lead to the
conclusion that proposed filters have higher area under the squared
passbands magnitude response compared to filters with the same maximum pole
radius. Furthermore, utilization of the proposed method can result in
transfer functions that have the lowest possible maximum pole radius.
A method for determining arc breakdown in low-voltage electrical networks
Authors: Rashevskaya Marina , Yanchenko Sergey , Gudozhnikov Alexey , Kulikov Alexey
Published: March 2023

In low voltage distribution networks, there is a high risk of fires caused by
wiring faults that lead to short circuits. Arcing protection devices (ARCs)
already exist, but experiments show that they also often do not disable such
faults. The operation of most existing arc fault detection devices is based
on the detection of high frequency current components and their comparison
with load profiles. For the fast arc fault recognition low-frequency
oscillations can be assessed, which serve as a marker of the arc fault
presence in a LV distribution network. This method of arc fault recognition
in LV networks is easier to implement practically. Using the windowed
Fourier transform or Wavelet analysis, it is possible to determine the
change in time of the harmonic components of the current, which will be a
characteristic sign of the presence of an arc fault along with other signs.
An improved method for counting 6-cycles in low-density parity-check codes
Authors: Slimani Djamel , Kaddai Abdellah
Published: March 2023

Since their rediscovery in the early 1990s, low-density parity-check (LDPC)
codes have become the most popular error-correcting codes owing to their
excellent performance. An LDPC code is a linear block code that has a sparse
parity-check matrix. Cycles in this matrix, particularly short cycles,
degrade the performance of such a code. Hence, several methods for counting
short cycles in LDPC codes have been proposed, such as Fan?s method to
detect 4-cycles, 6- cycles, 8-cycles, and 10-cycles. Unfortunately, this
method fails to count all 6- cycles, i.e., ignores numerous 6-cycles, in
some given parity-check matrices. In this paper, an improvement of this
algorithm is presented that detects all 6-cycles in LDPC codes, as well as
in general bipartite graphs. Simulations confirm that the improved method
offers the exact number of 6-cycles, and it succeeds in detecting those
ignored by Fan?s method.
Alüvyon Zeminlerin Sıvılaşma Potansiyelinin Sayısal Analiz ile Belirlenmesi ve Zemin İyileştirmesinin Analize Etkileri
Authors: DAVRAN Selen , ÖZOCAK Aşkın , SERT Sedat , BOL Ertan
Published: March 2023

Depremler sırasında yumuşak alüvyon zeminlerin bulunduğu bölgelerde sıvılaşma kaynaklı hasarlar meydana gelebilmektedir. Bu nedenle bu çalışma, alüvyon kökenli Adapazarı zeminlerini temsil eden tipik bir kesitin sıvılaşma potansiyelinin sayısal analiz yardımıyla değerlendirilmesini konu almaktadır. Analizler, Plaxis 2D yazılımı ile yürütülmüş, zemin kesiti ise UBCSAND malzeme modeli ile modellenmiştir. Ek olarak, sıvılaşma potansiyeli yüksek olan Adapazarı zemin kesitinde, zemin iyileştirmesinin sıvılaşmaya karşı etkisinin belirlenebilmesi adına, yapı yükü uygulanması halinde ve yapı altında jet-grout kolonlarının modellenmesi durumlarında analizler tekrar edilmiştir. Deprem verisi olarak 1999 Marmara Depremi kullanılmıştır. Yapılan analizler sonucunda belirli analiz noktaları seçilerek, bu noktalardaki ivme-zaman, deplasman-zaman ve boşluk suyu basıncı değişimleri incelenmiştir. Söz konusu analiz noktalarında maksimum ivme değerleri incelendiğinde, bazı noktalarda sıvılaşmanın sönümlenememesi ile zemin büyütmelerinin yaşandığı gözlemlenmiştir. Deplasman-zaman değişimlerinde ise iyileştirmenin yatay deplasmanları %59 değerine kadar azalttığı belirlenmiştir. Ek olarak, iyileştirmenin olmadığı durumda boşluk suyu basınçlarının toplam gerilmeye ulaştığı ve sıvılaşmanın gerçekleştiği; iyileştirme durumunda ise boşluk suyu basınçları toplam gerilmeye ulaşmadığından sıvılaşmanın önüne geçildiği gözlemlenmiştir. Sonuçlara dayanarak, modelin sıvılaşma davranışını temsil edip etmediğinin daha detaylı tartışılması gerektiği belirlenmiştir.
Clinicopathological analysis of 1571 cutaneous malignant melanomas in Valencia, Spain: factors related to tumour thickness
Authors: Nagore E , Oliver V , Botella-Estrada R , Moreno-Picot S , Guillén C , Fortea JM.
Published: March 2023

Epidemiological studies on cutaneous melanoma in Mediterranean countries are scarce. Our aim was to perform a descriptive analysis of melanoma cases diagnosed in Valencia, Spain, and to evaluate the relationship between Breslow thickness and some clinical features. A total of 1571 patients with histologically confirmed cutaneous malignant melanoma diagnosed at the two main referral melanoma centres were evaluated retrospectively. For each patient the following clinical and pathological characteristics were selected: age, gender, anatomic site, histogenetic type, Breslow thickness, presence of ulceration, the stage, and symptoms such as bleeding, changes in size and colour, altered sensations and previous traumas. Chi-squared tests were performed together with logistic regression to evaluate the relationship of variables with tumour thickness. Tumour thickness was independently correlated with increasing age, presence of bleeding, location on hand or foot, and presence of altered sensations. Female sex and presence of a change in colour were associated with thin melanomas. Ideally, public awareness campaigns concerning the risks that exist should be aimed at subgroups such as men and people of an advanced age who generally present with thicker tumours. Emphasis should be placed on irregularities or changes in pigmentation, as these appear to be the first indicators of the development of a melanoma.
Cutaneous cryptococcosis in an immunocompetent host
Authors: Yuge S , Bastazini Júnior I , Coelho MC , Soares CT.
Published: March 2023

This article does not have an abstract.
Cutaneous infiltrations can herald an inapparent myelodysplastic syndrome
Authors: Schneider LA , Schmid M , Staib G , Weiss T , Scharffetter-Kochanek K , Weber L.
Published: March 2023

This article does not have an abstract.
Persistent painful indurated erythema secondary to bosentan
Authors: Gallardo F , Gil A , Comín J , Molina L , Iglesias M , Pujol RM.
Published: March 2023

This article does not have an abstract.