bluuebunny/crossref_metadata_2025 huggingface dataset:
Fibroma traumático en mucosa labial superior: Reporte de caso
Authors: Chacón-Uscamaita Pamela Roxana , Chávez-Rimache Lesly , Mallma-Medina Adrian Segundo
Published: June 2021

El Fibroma traumático es una alteración caracterizada por una producción exagerada de tejido conjuntivo fibroso, producida por traumas crónicos. Generalmente se encuentra en mucosa oral como carrillos o lengua. En este caso en particular debido a que la paciente tiene dentición en el maxilar inferior y edentulismo total superior, se puede apreciar como progresó la lesión en la mucosa labial. La paciente de ochenta años acudió por renovación de su prótesis total superior debido a que dejo de usarla porque estaba desadaptada. Al examen clínico se observa un agrandamiento a nivel de mucosa labial superior izquierda, no dolorosa a la palpación y de coloración ligeramente blanquecina. Se decide tomar una biopsia excisional para establecer el diagnóstico definitivo debido a que existen varias lesiones con presentación clínica similar, la lesión fue compatible con un fibroma traumático, este trabajo se presenta con el objetivo de presentar las características clínicas e histopatológicas de un fibroma traumático, enfatizando la importancia de un diagnóstico temprano y oportuno para efectuar un tratamiento eficaz. Es importante considerar que, si la intervención quirúrgica no se acompaña con la rehabilitación protésica oral, pudiera aparecer una recidiva de la lesión.
Factores relacionados con el resultado de los tratamientos endodónticos realizados en una institución universitaria con odontólogos en formación
Authors: Pineda Vélez Eliana Lucena , Marín Muñoz Alejandra , Escobar Márquez Alejandra , Tamayo Agudelo William Fernando
Published: June 2021

Introducción y objetivo: el tratamiento endodóntico se realiza para tratar la enfermedad pulpoperiapical y puede tener un porcentaje de éxito de más del 90% en condiciones ideales para su realización. Dentro de los factores que condicionan la práctica clínica, se encuentran la anatomía interna del diente, las habilidades del operador, el conocimiento de la técnica, los instrumentos empleados y el tiempo operatorio. El éxito lo determina la supervivencia y la ausencia de signos clínicos y radiográficos en el seguimiento. Determinar los factores asociados al resultado del tratamiento de endodoncia, realizado por estudiantes de pregrado en odontología de una universidad colombiana. Materiales y métodos: estudio de cohorte retrospectivo con una cohorte expuesta y una no expuesta a la periodontitis apical. Se evaluaron clínica y radiográficamente todos los pacientes cuyo motivo de consulta fue endodoncia durante los años 2013-2014. Resultados: la media de edad de los pacientes fue 51,23 (DE = 14,23) con un mayor porcentaje de participación de mujeres (71,1%). En el diagnóstico inicial se encontró un 26% de dientes con Periodontitis apical. Se encontró asociación entre una mediana mayor de consultas y no presentar Periodontitis apical al final del tratamiento. En los análisis bivariados y multivariados se encontró asociación de la presencia de accidentes y endodoncia suboturada con la presencia de Periodontitis apical al final del tratamiento. Conclusión: seguir protocolos y guía de atención que permitan evitar los accidentes y conservar la adecuada longitud en la conformación y obturación pueden incrementar la frecuencia de éxito en los tratamientos.
Producción científica sobre maloclusión en relación con ortodoncia y ortopedia. Análisis de indicadores bibliométricos
Authors: Jaimes-Monroy Gustavo , Coral Chamorro Diana Marcela , Padilla Sierra Marilyn Carolina , Mogollón Romero Laura Andrea
Published: June 2021

Introducción y objetivo: El tratamiento temprano de las maloclusiones se ha convertido en un tema polémico entre los ortodoncistas, que se debaten en su uso. El propósito del presente artículo es indagar en la producción científica en los últimos cinco años sobre el tema de maloclusiones, y dentro de este campo en la ortopedia como aproximación al tratamiento temprano. Materiales y métodos: Se realizó un estudio de indicadores bibliométricos con análisis temporal para cinco años. Se revisaron las variables de producción anual de artículos, revistas, autores, cooperación y análisis de citas. Resultados: El año de mayor producción fue 2017 tanto para el tema de maloclusión en ortopedia como el de ortodoncia. El autor más citado en el tema de maloclusión en ortodoncia fue Janson Guilherme con 27 publicaciones y 65 citas. En el tema de maloclusión y ortopedia fue Franchi Lorenzo con 18 publicaciones y 88 citas; la revista con mayor cantidad de artículos es la American Journal of Orthodontics and Dentofacial Orthopedics. Estados Unidos, Italia y Brasil son los países con más divulgaciones asociadas a estos temas. Conclusiones: Existe una producción en aumento anual de las temáticas de maloclusión y ortodoncia, mientras que la temática de maloclusión y ortopedia cuenta con una producción menor.
Source water quality requirements for artificial groundwater recharge
Authors: Hägg K. , Chan S. , Persson T. , Persson K. M.
Published: June 2021

This study was an investigation of the need for pre-treatment of a new raw water source for artificial groundwater recharge. The study was done through a column test, well sampling and survey data relating to 11 artificial recharge plants in Sweden. The column test showed that only 30% of the natural organic matter (NOM) was removed from the new raw water source during infiltration. The survey revealed that the new water source's quality was within the range requiring pre-treatment prior to infiltration. The well sampling results showed a significant correlation between the NOM content in the raw and treated waters for WTPs without pre-treatment (r = 0.78 and ρ = 0.04), indicating one of the short-term limitations of artificial recharge. The study results indicate that the new raw water source is unsuitable for direct use in artificial recharge and that treatment is required prior to infiltration.
Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
Authors: Muñoz-Páez Karla María , Buitrón Germán
Published: June 2021

This study compares the H2 production from glucose, xylose, and acidic hydrolysates of Agave tequilana bagasse as substrates. The fermentation was performed in a granular sludge reactor operated in two phases: (1) model substrates (glucose and xylose) and (2) acidic hydrolysates at 35 °C, pH 4.5 and a hydraulic retention time of 5.5 h with glucose (10 g L−1) and xylose (12 g L−1). A sequencing batch reactor was used to acclimate the biomass between the glucose and xylose continuous fermentation (with a mixture of xylose-glucose) and acidic hydrolysates. During the discontinuous acclimating step, the xylose/glucose ratio increment negatively affected the H2 productivity. Although the continuous H2 production with xylose was negligible, the co-fermentation with glucose (88–12%) allowed H2 productivity of 2,889 ± 502 mL H2 L−1d−1. An acidic hydrolysate concentration of 3.3 gcarbohydrate L−1 showed a three-fold higher H2 productivity than with a concentration of 10 g L−1. The results indicated that xylose, as the only substrate, was challenging to metabolize by the inoculum, and its mixture with glucose improved the H2 productivity. Therefore, the low H2 productivity with hydrolysates could be related to the presence of xylose.
LA RELEVANCIA DE LA VALUES HISTORY EN SU RELACIÓN CON LOS USUALMENTE DENOMINADOS “TESTAMENTOS VITALES”:OTRA CUESTIÓN DE RELEVANCIA QUE NOS PLANTEA LA BIOÉTICA JURÍDICA
Authors:   Universidad de Talca, Mondaca Miranda Alexis
Published: June 2021

El presente artículo, desde una mirada centrada en la Bioética Jurídica, tiene por objetivo el estudio de la values history en su relación con los ordinariamente denominados “testamentos vitales”, materias que deben incluir en su análisis la influencia ejercida por los respectivos códigos axiológicos. De esta manera, una vez estudiada la génesis de dichas figuras, nos centramos en sus contenidos para finalmente referirnos al Proyecto de Ley sobre Muerte Digna y Cuidados Paliativos, texto actualmente en discusión en nuestro Congreso Nacional. Así, siempre desde un enfoque fundado en la Bioética Jurídica, se trata la relevancia de los valores a los que adhieren las personas con respecto a temas tan trascendentales como la enfermedad, el dolor, los tratamientos médicos y la muerte.
Multi-component Reactions for the Synthesis of Biologically Relevant Molecules Under Environmentally Benign Conditions
Authors: Shaw Ranjay , Elagamy Amr , Althagafi Ismail , Srivastava Akhilesh Kumar , Pratap Ramendra
Published: June 2021

Heterocycles are very important scaffolds since many of them exhibit building
blocks properties and good biological activities. Various chemical methods have been utilized
for their synthesis and out of them, the environmentally benign approaches are highly demanding
in view of the importance of green chemistry.

There are vast pieces of literature available on sustainable and multi-component synthetic
approaches, but it is difficult for a researcher to keep up with research. Therefore, a review
article in sustainable and multi-component synthesis of heterocycle was highly required.
Herein, we have compiled the work of literatures related to multi-component reaction under
solvent free condition, ultrasound assisted, water or ionic liquid mediated conditions.
Anti-convulsive Effect of Thiamine and Melatonin Combination in Mice: Involvement of Oxidative Stress
Authors: Dehdashtian Ehsan , Hosseinzadeh Azam , Hemati Karim , Karimi Mohammad Yahya , Fatemi Iman , Mehrzadi Saeed
Published: June 2021

Background:

Epilepsy, the second most frequent neurological disease, is a chronic disorder
with a high lifetime prevalence. Therefore, various studies are needed to find new effective therapeutic
agents to treat seizures or prevent their complications. In this study, we investigated the effects
of thiamine, melatonin and their combination on pentylenetetrazol (PTZ)-induced tonic-clonic
seizures in mice.

Methods:

Male mice were randomly divided into six groups, including control, seizure control, diazepam,
melatonin, thiamine and melatonin, and thiamine combination groups. Drugs were given
orally in drinking water for 14 days. On the 15th day, the seizure was induced (except the control
group) by intraperitoneal injection of PTZ. In all groups, the time between the injection and the
start of the seizure (latency), and also the length of the seizure attack (duration), were measured in
a 30-minute period. After measuring the latency and duration in all groups, mice were killed by
CO2 Box and their brains were dissected to be analyzed for malondialdehyde (MDA) level as a
marker of oxidative stress.

Results:

The seizure duration was significantly lower in the groups of melatonin, thiamine and thiamine
and melatonin combination compared to the seizure control group. The latency times in these
groups were significantly greater than in the seizure control group. Moreover, MDA concentrations
were lower in these groups compared to the seizure control group.

Conclusion:

Thiamine, melatonin and their combination can decrease the duration time of seizure
and increase the latency period, which may result from inhibition of oxidative stress in the brain.
Spin-casting of Micron-Scale Thick PMMA Films with Embedded Au
Nanoparticles Formed by Laser Ablation in Liquid
Authors: Musaev Omar
Published: June 2021

Background:

A Facile, scalable approach to fabrication of organic thin films with an
embedded layer of nanoparticles in the ambient environment. The approach is based on step-bystep
spin-coating of polymethylmethacrylate (PMMA) films and a nanoparticle layer.

Objective:

The goal of the present work is to fabricate a sandwich structure of the PMMA films for
the top and bottom layers of a sandwich structure as well as a middle layer of nanoparticles formed
in solution by the Laser Ablation in Liquid (LAL) method.

Methods:

First, a PMMA thin film was fabricated by spin-casting of PMMA solution in ethylacetate.
Secondly, a solution of Au nanoparticles synthesized by laser ablation in ethanol was spin-cast
on a prefabricated PMMA film. The distribution of Au nanoparticles and the morphology of the resulting
film were analyzed using scanning electron microscopy (SEM), optical microscopy, and
atomic microscopy (AFM). Finally, another PMMA layer was spin-cast on the nanoparticle-decorated
film.

Results:

A hybrid organic film with the embedded layer of nanoparticles was fabricated using the
spin-casting method for top and bottom layers as well as for the middle layer of Au nanoparticles
fabricated by laser ablation in ethanol by a pulsed UV laser. Statistical and fractal analysis shows
uniform distribution of nanoparticles on length scale above ten microns.

Conclusion:

Spin-cast-based layer-by-layer approach to fabrication of sandwich structures of organic
films with embedded nanoparticlesis a facile and scalable method for hybrid organic - nanoparticle
films. This approach can be extended for the fabrication of multi-layered hybrid structures.
Investigating the Effect of Dwell Time on the Physical Properties of Nano-sized Tin dioxide (SnO2) Prepared Through a Continuous Microwave Flow Process
Authors: Akram Muhammad
Published: June 2021

Tin dioxide (SnO2) is a well-known catalytic material used to catalyze different organic dyes and gas sensors. Similarly, it is also considered a good sensing and optoelectronic material. In this work, SnO2 has been synthesized using a microwave-assisted continuous flow method. The effect of dwell time was utilized to study its effects on the physical properties of SnO2. X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM) and Bruner Emmit-Teller (BET) techniques were used to characterize the synthesized SnO2. UV-Visible spectroscopy technique was employed to calculate the energy bandgap, which exhibited a decrease in the energy bandgap from 3.44 to 3.33 eV on increasing the dwell time. XRD results exhibited an increase in the degree of crystallinity from 56 to 63% and a reduction in the particle size from 3.74 to 2.75 nm. Where, BET study revealed a shrinkage in the surface area from 159 to 154 m2g- 1. Photoluminescence (PL) study was conducted to investigate the surface defects. Photocatalytic efficiency of the SnO2 was probed against the photodegradation of methylene blue dye and this study revealed that SnO2 is a good photocatalytic material.
Búsqueda de Borrelia spp. en garrapatas del género Amblyomma de Argentina
Authors: Cicuttin Gabriel , De Salvo María N. , Díaz-Pérez Paula , Lamattina Daniela , L.Tarragona Evelina , M. Orcellet Viviana , Nava Santiago
Published: June 2021

Objetivo. El objetivo del presente estudio fue detectar la presencia de Borrelia spp. en especies de garrapatas del género Amblyomma en Argentina. Materiales y métodos. Se analizaron especímenes de garrapatas del género Amblyomma colectadas de distintas provincias de Argentina (Entre Ríos, Misiones, Formosa, Salta, Córdoba, San Luis y Buenos Aires) mediante una PCR anidada para un fragmento de 306 pb del gen fla del género Borrelia. Resultados. Se analizaron 422 ejemplares de las especies Amblyomma aureolatum, Amblyomma brasiliense, Amblyomma ovale, Amblyomma sculptum, Amblyomma tigrinum, Amblyomma tonelliae y Amblyomma triste de diversas regiones de Argentina. Todas las muestras estudiadas resultaron negativas mediante la PCR. Conclusiones. Las especies de garrapatas del género Amblyomma analizadas en el presente estudio son de importancia en salud pública; si bien no se detectó infección con bacterias del género Borrelia, considerando los escasos antecedentes previos, futuros estudios en esta temática son necesarios en este género de garrapatas.
Dynamic Behavior of Li in Solid-State Li-Ion Batteries Studied using MeV Ion Beam Analysis Techniques
Authors:   Nagoya Industrial Science Research Institute, 1-13 Yotsuya-tori, Chikusa-ku, Japan, Morita Kenji , Tsuchiya Bun ,   Meijo University, 501 Shiogamaguchi, Tenpaku-ku, Japan
Published: June 2021

In this review, various studies on the Li depth profiles of metal/electrolyte/metal capacitors and batteries of Au/LCO/LATP/Pt, LCO/LiPON/Si, and LMO/LiPON/NbO with different metal electrodes at both sides (by bias; LCO =LiCoO2, LATP =Li3.1Al0.86Ti1.14Ge1.27P1.73O12, LMO =LiMn2O4, NbO = Nb2O5) using the in-situ reflection ERD (ERD) technique with 9MeV O+4 ion beam and transmission ERD (TERD) technique with 5MeV He+2 ion beam, respectively, are described. For capacitors, the transport fraction of Li-ion in the electrolyte is less than unity. The Li atoms diffuse in the direction opposite to the ion. It has been shown that the batteries are rechargeable. On the other hand, it is observed that an anomalous over-charging takes place when the batteries are over-biased (Si/LiPON/LCO and LMO/LiPON/NbO), and strong reactions of Li with the metal electrodes take place under these conditions. The anomaly observed is explained in terms of the imbalance in the capacities of Li in anode and cathode, which can be attributed to the sizeable amounts of hydrogen present as an impurity during the fabrication of the battery. This is because hydrogen can potentially reduce the capacity of Li in both anode and cathode. The reactions of Li with metal electrodes are discussed in terms of the transport fraction of Li ions (less than unity) and the difference in the work functions of metal electrodes at both sides. Finally, it is noted that the removal of hydrogen in batteries can potentially improve safety, efficiency, and lifetime. These can be achieved by reducing the reaction of Li with metal electrodes. The recoil-scatter method in the TERD technique can measure the Li depth profile in the absence of background yields.
A Review of the Multi-Physical Characteristics of Plant Aggregates and Their Effects on the Properties of Plant-Based Concrete
Authors:   Université de Toulouse, INSA, UPS, LMDC (Laboratoire Matériaux et Durabilité des Constructions), 135 avenue de Rangueil, 31 077 Toulouse Cedex 04, France, Ratsimbazafy Herinjaka Haga , Laborel-Préneron Aurélie ,   Université de Toulouse, INSA, UPS, LMDC (Laboratoire Matériaux et Durabilité des Constructions), 135 avenue de Rangueil, 31 077 Toulouse Cedex 04, France, Magniont Camille ,   Université de Toulouse, INSA, UPS, LMDC (Laboratoire Matériaux et Durabilité des Constructions), 135 avenue de Rangueil, 31 077 Toulouse Cedex 04, France, Evon Philippe ,   Université de Toulouse, INP, INRAe, ENSIACET, LCA (Laboratoire de Chimie Agro-industrielle), 4 allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France
Published: June 2021

The use of plant aggregates obtained from agricultural co-products mixed with mineral binders to form eco-friendly insulating building materials has been initiated for a few years to bring environmentally friendly solutions to the construction sector. Several studies on different agro-resources have already been carried out, providing various information about the properties of plant aggregates and plant-based concrete. However, the characteristics of the agricultural co-product, which allow it to qualify as a plant aggregate for plant-based concrete, are not yet very clear despite the multitude of data, especially on hemp concrete. Therefore, it is important to gather numerous but very disparate pieces of information available in the literature concerning the properties of plant aggregates and their correlations with composites. This review is based on the results of 120 articles and aims to identify the characterization methods and the multi-physical properties of plant aggregates affecting those of plant-based concrete and to propose additional factors that could influence the properties of the composites. A total of 18 plant aggregates of different origins used for plant-based concrete have been listed in the literature. In France, hemp shiv is the most studied one, but its quantity is quite low unlike cereal or oilseed straws and wood transformation residues. With the existence of several characterization methods, properties like microstructure, particle size distribution, bulk density, water absorption capacity, and chemical composition of aggregates are easily and frequently determined. In contrast, data on the apparent density of particles, the skeleton density, and the hygro-thermal properties of aggregates are rare. The particle size, density, and porosity have been identified as important parameters influencing the properties of the composites. Other parameters related to the behavior of the aggregates under wet compaction and compression of their stacking can also predict the physical and mechanical properties of the obtained plant-based concrete. Dosages of the constituents should be preferred as formulation parameters for future studies assessing the impact of the aggregate properties on the composites.
Appropriation of mHealth Interventions for Maternal Health Care in Sub-Saharan Africa: Hermeneutic Review
Authors: Maliwichi Priscilla , Chigona Wallace , Sowon Karen
Published: June 2021

Background

Many maternal clients from poorly resourced communities die from preventable pregnancy-related complications. The situation is especially grave in sub-Saharan Africa. Mobile health (mHealth) interventions have the potential to improve maternal health outcomes. mHealth interventions are used to encourage behavioral change for health care–seeking by maternal clients. However, the appropriation of such interventions among maternal health clients is not always guaranteed.

Objective

This study aims to understand how maternal clients appropriate mHealth interventions and the factors that affect this appropriation.

Methods

This study used a hermeneutic literature review informed by the model of technology appropriation. We used data from three mHealth case studies in sub-Saharan Africa: Mobile Technology for Community Health, MomConnect, and Chipatala Cha Pa Foni. We used the search and acquisition hermeneutic circle to identify and retrieve peer-reviewed and gray literature from the Web of Science, Google Scholar, Google, and PubMed. We selected 17 papers for analysis. We organized the findings using three levels of the appropriation process: adoption, adaptation, and integration.

Results

This study found that several factors affected how maternal clients appropriated mHealth interventions. The study noted that it is paramount that mHealth designers and implementers should consider the context of mHealth interventions when designing and implementing interventions. However, the usefulness of an mHealth intervention may enhance how maternal health clients appropriate it. Furthermore, a community of purpose around the maternal client may be vital to the success of the mHealth intervention.

Conclusions

The design and implementation of interventions have the potential to exacerbate inequalities within communities. To mitigate against inequalities during appropriation, it is recommended that communities of purpose be included in the design and implementation of maternal mHealth interventions.
Youths’ and Parents’ Experiences and Perceived Effects of Internet-Based Cognitive Behavioral Therapy for Anxiety Disorders in Primary Care: Mixed Methods Study
Authors: Lilja Josefine Lotten , Rupcic Ljustina Mirna , Nissling Linnea , Larsson Anna Caroline , Weineland Sandra
Published: June 2021

Background

Anxiety is common among youths in primary care. Face-to-face treatment has been the first choice for clinicians, but during the COVID-19 pandemic, digital psychological interventions have substantially increased. Few studies have examined young people’s interest in internet treatment or the attitudes they and their parents have toward it.

Objective

This study aims to investigate adolescents’ and parents’ attitudes toward and experiences of internet-based cognitive behavioral anxiety treatment in primary care and its presumptive effects.

Methods

The study used mixed methods, analyzing qualitative data thematically and quantitative data with nonparametric analysis. Participants were 14 adolescents and 14 parents recruited in adolescent primary health care clinics. The adolescents and their parents filled out mental health questionnaires before and after treatment, and were interviewed during ongoing treatment.

Results

The quantitative data indicated that the internet-delivered cognitive behavioral therapy program used in this study was successful in reducing symptoms (χ22=8.333; P=.02) and that adolescents’ motivation is essential to the treatment outcome (r=0.58; P=.03). The qualitative results show that youths highly value their independence and freedom to organize treatment work on their own terms. The parents expressed uncertainty about their role and how to support their child in treatment. It was important for parents to respect the youths’ need for autonomy while also engaging with them in the treatment work.

Conclusions

Internet treatment in primary care is accepted by both youths and their parents, who need clarification about the difference between their role and the therapist’s role. Patient motivation should be considered before treatment, and therapists need to continue to develop the virtual alliance. Finally, primary care should be clearer in informing adolescents and their parents about the possibility of internet treatment.
Standardizing the Development of Serious Games for Physical Rehabilitation: Conceptual Framework Proposal (Preprint)
Authors: Beristain-Colorado María Del Pilar , Ambros-Antemate Jorge Fernando , Vargas-Treviño Marciano , Gutiérrez-Gutiérrez Jaime , Moreno-Rodriguez Adriana , Hernández-Cruz Pedro Antonio , Gallegos-Velasco Itandehui Belem , Torres-Rosas Rafael
Published: June 2021

BACKGROUND

Serious games have been used as supportive therapy for traditional rehabilitation. However, most are designed without a systematic process to guide their development from the phases of requirement identification, planning, design, construction, and evaluation, which reflect the lack of adaptation of rehabilitation requirements and thus the patient’s needs.

OBJECTIVE

The aim of this study was to propose a conceptual framework with standardized elements for the development of information systems by using a flexible and an adaptable process centered on the patient’s needs and focused on the creation of serious games for physical rehabilitation.

METHODS

The conceptual framework is based on 3 fundamental concepts: (1) user-centered design, which is an iterative design process focused on users and their needs at each phase of the process, (2) generic structural activities of software engineering, which guides the independent development process regardless of the complexity or size of the problem, and (3) gamification elements, which allow the transformation of obstacles into positive and fun reinforcements, thereby encouraging patients in their rehabilitation process.

RESULTS

We propose a conceptual framework to guide the development of serious games through a systematic process by using an iterative and incremental process applying the phases of context identification, user requirements, planning, design, construction of the interaction devices and video game, and evaluation.

CONCLUSIONS

This proposed framework will provide developers of serious games a systematic process with standardized elements for the development of flexible and adaptable software with a high level of patient commitment, which will effectively contribute to their rehabilitation process.
COVID-19 Vaccine Perception in South Korea: Web Crawling Approach (Preprint)
Authors: Lee Hocheol , Noh Eun Bi , Park Sung Jong , Nam Hae Kweun , Lee Tae Ho , Lee Ga Ram , Nam Eun Woo
Published: June 2021

BACKGROUND

The US Centers for Disease Control and Prevention and the World Health Organization emphasized vaccination against COVID-19 because physical distancing proved inadequate to mitigate death, illness, and massive economic loss.

OBJECTIVE

This study aimed to investigate Korean citizens’ perceptions of vaccines by examining their views on COVID-19 vaccines, their positive and negative perceptions of each vaccine, and ways to enhance policies to increase vaccine acceptance.

METHODS

This cross-sectional study analyzed posts on NAVER and Instagram to examine Korean citizens’ perception of COVID-19 vaccines. The keywords searched were “vaccine,” “AstraZeneca,” and “Pfizer.” In total 8100 posts in NAVER and 5291 posts in Instagram were sampled through web crawling. Morphology analysis was performed, overlapping or meaningless words were removed, sentiment analysis was implemented, and 3 public health professionals reviewed the results.

RESULTS

The findings revealed a negative perception of COVID-19 vaccines; of the words crawled, the proportion of negative words for AstraZeneca was 71.0% (476/670) and for Pfizer was 56.3% (498/885). Among words crawled with “vaccine,” “good” ranked first, with a frequency of 13.43% (312/2323). Meanwhile, “side effect” ranked highest, with a frequency of 29.2% (163/559) for “AstraZeneca,” but 0.6% (4/673) for “Pfizer.” With “vaccine,” positive words were more frequently used, whereas with “AstraZeneca” and “Pfizer” negative words were prevalent.

CONCLUSIONS

There is a negative perception of AstraZeneca and Pfizer vaccines in Korea, with 1 in 4 people refusing vaccination. To address this, accurate information needs to be shared about vaccines including AstraZeneca, and the experiences of those vaccinated. Furthermore, government communication about risk management is required to increase the AstraZeneca vaccination rate for herd immunity before the vaccine expires.
ASSESSMENT AND CALCULATION METHODOLOGY OF GEOECOLOGICAL (LITHOEDAPHOLOGICAL) RISK OF LANDSLIDES DURING THE INFLUENCE TO FERTILE LAYERS OF SOIL
Authors:   Moscow State University of Civil Engineering, Prasolov A.A. , Orlova N.A. , Volfson I.F. ,   Geochemistry RosGeo
Published: June 2021

The paper presents the main characteristics of assessment and calculation of the risk caused by hazardous geological and engineering-geological processes on the example of landslides. The main aspects of assessing geological risk are shown – physical, economic, social and ecological. The main features of ecological risk are indicated, the most common methods for determination it are identified.When considering the impact of landslide processes on fertile soil layers, two main drawbacks were found - underestimation of the depth of the landslides’ impact on the soil cover and the absence of pronounced differences between risk assessments for living communities (soil ecosystems) within the framework of geoecological risk (in this case, lithoedaphological risk) and risk for abiotic components (soil cover) within the environmental risk (in this case, lithopedological risk). Various methods are presented and aspects taken into account for the assessment of geoecological risk, medical and social problems, potentially caused by landslide processes, are noted.
APPROACHES FOR SOIL REMEDIATION DURING DEVELOPMENT OF HYDROCARBON RESOURCES OF THE CASPIAN BLACK SEA REGION
Authors:   Sergo Ordzhonikidze Russian State University for Geological Prospecting, Rukavitsyn V.V.
Published: June 2021

The article presents approaches to the assessment of soil quality during the remediation of polluted areas. An analysis of the Russian and European legislation is presented to develop the resulting direction of the assessment that combines the best practices of all the mentioned approaches considered.
FORECAST OF LOESS PSEUDOKARST FLAT PART OF THE CRIMEAN PENINSULA
Authors:   Moscow State University of Civil Engineering, Alyoshina T.S.
Published: June 2021

The article briefly discusses the supposed development of the loess pseudokarst of the plain part of the Crimean Peninsula. The formation of pseudokarst forms, peculiarities of loess pseudokarst, and the geology of the Crimean Peninsula are described in detail.
DISPOSALOF CONCRATE AT THE CONSTRUCTION SITE DURING THE RENOVATION OF URBANIZED AREAS
Authors:   St.Petersburg State University of Architecture and Civil Engineering, Budzinski P.A.
Published: June 2021

When renovating built-up areas, buildings are subject to demolition, the bearing and enclosing structures of which are made of reinforced concrete, concrete and brick. It is not advisable to take the disassembled structures to landfills, since it is possible to process concrete structures at stationary factories and mobile plants by crushing into crushed stone, sand and reuse these materials in construction. The article discusses the option of recycling concrete at a construction site using a set of construction machines on the example of the renovation of a residential area in St. Petersburg in order to assess the environmental and economic effect of the method of recycling reinforced concrete scrap.
SUSTAINABLE DEVELOPMENT OF COASTAL AREAS OF LARGE SIBERIAN CITIES
Authors:   Novosibirsk State University of Architecture and Civil Engineering (SIBSTRIN), Burilo N.A.
Published: June 2021

Supporting the environmental protection balance of territories along large Siberian rivers as a systematic aspect, involving the consideration of the research object as a component of the general urban planning structure, first of all, has the need to identify suitable territories in order to place point objects in the territory with a complex relief and choose the most cost-effective and effective reconstruction and revitalization methodology. A study of methods of using territories in local conditions has been carried out.
UNCERTAINY OF THE RIVER’S BASELEVEL (ON THE EXAMPLE OF THE LOVAT RIVER)
Authors:   Moscow State University of Civil Engineering, Vinogradov I.A.
Published: June 2021

Studies of channel deformations are important for the design of hydraulic structures on rivers. Deep deformations in the lower reaches can theoretically not exceed the baselevel. The aim of the work was to determine the baselevel of the Lovat River and compare it with the elevation marks of the river bottom.
INVOLVEMENT OF WASTE FROM OIL AND GAS FIELDS IN TECHNOGENIC SOILS AND GROUND CONCRETE
Authors:   Samara State Technical University, Gilaev G. G. , Shtern A.M. , Kuptsova E.S. , Chertes K.L. , Tupitsyna O.V.
Published: June 2021

The article considers the system of differentiation of oil and gas fields for the application of the technology of waste entrainment in man-made soils and soil-concrete on the territory of the plant. It names the indicators for which the mathematical analysis of the parameters by the principal component analyses is used. As a result, the analysis of the deposits of the Samara region was carried out. The universality of the new method is proven.
HEAVY METAL CONTAMINATION OF SOILS IN THE NALAIKH REGION (MONGOLIA)
Authors:   Moscow State University of Civil Engineering, Jargalsaihan B.
Published: June 2021

The content of heavy metals in soils of the Nalaikh region, in which coal was mined for a long period, was investigated. The purpose of the work was to assess the possibility of ecological safe renovation of this territory. According to the results obtained, the level of contamination of most areas of the Nalaikh region with heavy metals is insignificant and cannot pose a threat to human health.
APPLICATION OF A RISK-BASED APPROACH IN THE OCCUPATIONAL HEALTH MANAGEMENT SYSTEM
Authors:   National Research University Moscow Power Engineering Institute, Zykin P.E. , Ozerova N.V.
Published: June 2021

The economic efficiency of the application of the risk-oriented approach is considered, the use of the risk capacity method allows justifying the costs of labor protection as an investment in the development of the organization itself.
MANAGEMENT OF NATURAL AND MAN-MADE LANDSCAPES IN THE IMPACT ZONE OF THE "LEBYAZHYE" TAILINGS STORAGE FACILITY IN NORILSK
Authors:   Moscow State University of Civil Engineering, Lukyanova Yu.N.
Published: June 2021

The tailings storage facility "Lebyazhye" operates as part of two fields. A third field is currently being designed. Therefore, at the construction stage, it is most important to solve the issues of managing natural and man-made landscapes in the zone of influence of the tailings storage facility.
Scrutinizing the potential use of Discord application as a digital platform amidst emergency remote learning
Authors: Wahyuningsih Endang , Baidi Baidi
Published: June 2021

A common challenge encountered by educators to engage in an emergency remote learning is the selection of an effective digital platform to assist teaching and learning activities. Drawing on this issue, this study offers a practical solution by scrutinizing the potential use of android-based application named Discord as a digital platform to conduct online teaching and learning. To this end, a group of elementary school teachers and students enrolled in Islamic religious and moral education courses was involved as participants in a descriptive qualitative research by employing interview, observation, and documentation as instruments to collect the required data. The results demonstrated that Discord android-based application was proven to be an alternative for elementary school educators as a digital learning platform during the emergency remote learning in the age of Covid-19 pandemic. The results of observation further showed that online teaching-learning activities using Discord application could successfully create communicative digital learning environment which was interesting and enjoyable for the students. Despite the potential advantages, a number of challenges were also discussed in this study. The results of this study contribute as a practical insight for teachers and students in assisting online learning activities as Discord application helps them experience a new nuance of distance learning.
THE ANALYSIS OF INTENTION TO BUY: AN EXTENDED THEORY OF PLANNED BEHAVIOR
Authors: Pinasthika Danu Gilang , Suroso Agus , Wulandari Siti Zulaikha
Published: June 2021

This research is aimed to test an empirical study on UNSOED Press. The study took the title: "The Analysis of Intention to Buy: An Extended Theory of Planned Behavior". The purpose of this research is to know and find empirical evidence of the influence of Brand Awareness, Price, Attitude, Subjective Norm, Perceived Behavioral Control of Purchase Intention. The population in this study were students in Universitas Jenderal Soedirman. The samples in this study were 211 person. Sample determination using the Convenience sampling method. The analysis tool used is multiple regression. Based on the results of the research and analysis of data shows that:(1) Brand Awareness has no effect on Purchase Intention. (2) Price has a positive effect on Purchase Intention. (3) Attitude has a positive effect on Purchase Intention. 4 Subjective Norm has no effect on Purchase Intention. 5 Perceived Behavioral control has a positive effect on Purchase Intention. The implication of the conclusion above is, UNSOED Press has to build awareness among students or target market. Promotion from faculty and lecturers must be improved. Lecturers can provide suggestions for using UNSOED Press during classroom learning. For the price, respondent said the price was not too expensive and have to maintance quality.
ANALYSIS OF THE EFFECT OF CAPITAL ADEQUACY RATIO, NON PERFORMING FINANCING, AND FINANCING TO DEPOSIT RATIO ON PROFITABILITY: A CASE STUDY ON ISLAMIC COMMERCIAL BANKS IN INDONESIA
Authors: Muawanah Ema , Imronudin Imronudin
Published: June 2021

This study aims to analyze the effect of Capital Adequacy Ratio (CAR), Non-Performing Financing (NPF), and Financing to Deposit Ratio (FDR) on Profitability (Case Study on Islamic Commercial Banks in Indonesia). This research used secondary data in the form of Islamic Commercial Bank financial statements. The population in this study is Islamic Commercial Banks listed on the Indonesia Stock Exchange in 2016-2018. The sampling technique employed was purposive sampling. A sample of 3 banks was obtained. Multiple linear regression was used. Classical assumption analysis was done prior to data analysis. Hypothesis testing used t-test, F test, and the coefficient of determination (R2). The results of this study indicated that CAR has a positive and significant effect on profitability, NPF has a negative and significant effect on profitability and FDR has a negative and no significant effect on profitability. Meanwhile, the independent variables together have an effect on profitability. The result of the coefficient of determination test shows that 61.1% of the profitability of Islamic Commercial Banks in Indonesia is explained by the variables of CAR, NPF, and FDR, while the remaining 38.4% is explained by other variables outside the model.
CORTISTATIN REGULATES FIBROSIS AND MYOFIBROBLAST ACTIVATION IN EXPERIMENTAL HEPATOTOXIC- AND CHOLESTATIC-INDUCED LIVER INJURY
Authors: Benitez Raquel , Caro Marta , Andrés-León Eduardo , O'Valle Francisco , Delgado Mario
Published: June 2021

Liver fibrosis induced by chronic hepatic injury remains as a major
cause of morbidity and mortality worldwide. Identification of
susceptibility/prognosis factors and new therapeutic tools for treating
hepatic fibrotic disorders of various etiologies are urgent medical
needs. Cortistatin is a neuropeptide with potent anti-inflammatory and
anti-fibrotic activities in lung that binds to receptors that are
expressed in liver fibroblasts and hepatic stellate cells. Here, we
evaluated the capacity of cortistatin to regulate liver fibrosis. We
initially found that hepatic expression of cortistatin inversely
correlated with liver fibrosis grade in mice and humans with hepatic
disorders. Cortistatin-deficient mice showed exacerbated signs of liver
damage and fibrosis and increased mortality rates when challenged to
hepatotoxic and cholestatic injury. Compared to wild-type mice,
non-parenchymal liver cells isolated from cortistatin-deficient mice
showed increased presence of cells with activated myofibroblast
phenotypes and a differential genetic signature that is indicative of
activated hepatic stellate cells and periportal fibroblasts and of
myofibroblasts with active contractile apparatus. Cortistatin treatment
reversed in vivo and in vitro these exaggerated fibrogenic phenotypes
and protected from progression to severe liver fibrosis in response to
hepatic injury. In conclusion, we identify cortistatin as an endogenous
molecular break of liver fibrosis and its deficiency as a potential
poor-prognosis marker for chronic hepatic disorders that course with
fibrosis. Cortistatin-based therapies emerge as attractive strategies
for ameliorating severe hepatic fibrosis.
The relationship between uterine corpus inclination and the outcomes of in vitro fertilization and embryo transfer: a retrospective study
Authors: Wang Xiuxia , Zuo Na , Zhang Ning-Ning , Dong Sitong , Zhang Wei , Li Da
Published: June 2021

Objective: To investigate the impact of the uterine corpus inclination
on pregnancy outcomes in in vitro fertilization and embryo transfer
(IVF-ET). Design: Retrospective cohort study. Setting: University-based
reproductive medicine center. Population: 526 patients underwent their
first frozen embryo transfer (FET) cycle. Methods: All patients
underwent transvaginal ultrasound examination to measure the distance
from the midline of uterine cavity to the ultrasound probe, which
indirectly reflect the uterine corpus inclination. The uterine corpus
tends toward the horizontal position as the average distance increases.
Multivariable regression analysis was used to study the effect of the
uterine corpus inclination on pregnancy outcomes, even in different
embryo stage cohorts as subgroup analysis. Main outcomes measures:
Clinical pregnancy rate (CPR), spontaneous abortion rate, and live birth
rate (LBR). Results:The patients were grouped according to the quartiles
of the average distance distribution (Group 1, ≤ 1.98 cm; Group 2,
1.99-2.19 cm; Group 3, 2.20-2.50 cm; Group 4, ≥ 2.51 cm). There were
statistically significant differences in the CPR and LBR between Groups
1 and 4 in the cleavage-stage ET cohort (CPR: adjusted odds ratio
[OR] 0.225, 95% confidence interval [CI] 0.068-0.774; LBR:
adjusted OR 0.315, 95% CI 0.100-0.996) (P < 0.05). There were
no significant differences among the four groups in pregnancy outcomes
in the blastocyst transfer cohort (P > 0.05). The cut-off
value of 2.146 cm was calculated to predict the pregnancy outcomes in
the cleavage-stage ET cohort. Conclusion:The uterine corpus inclination
might be an independent risk factor for the success of cleavage-stage ET
Resolution of Rabbit Haemorrhagic Disease Virus 2 (RHDV2; GI.2) Outbreak in Singapore
Authors: Lim Kelvin , Tan Alwyn , Ho Kelvin , Sng Wendy , Lim Hwee Ping , Chan Cathy , Xinyu Toh , Ong Jasmine , Fernandez Charlene
Published: June 2021

Rabbit Haemorrhagic Disease (RHD) is a significant viral disease
affecting lagomorphs. The first documented cases of RHD in Singapore
occurred in adult pet European rabbits in September 2020. Singapore
subsequently declared the outbreak resolved in December 2020.
Epidemiological investigations ruled out introductions via importation
of infected rabbits and contaminated feed. The source could not be
definitively determined. However, the findings suggest that the incident
involved both inter- and intra-household transmission and veterinary
clinic-household transmission. This incident demonstrated the importance
of sustained application of biosecurity measures, epidemiological
investigations, and control, including active case finding, expedient
vaccine dissemination, and risk communications. It shows that Singapore,
an urbanised city-state, without a significant lagomorph population,
could still encounter emerging diseases such as rabbit haemorrhagic
disease. Given its social impact on rabbit owners, the National Parks
Board Singapore and the private veterinarians worked together to
communicate and urge the adoption of biosecurity measures and assuage
the concerns of rabbit owners.
Effect of TiO2 in fine zircon sintering and properties
Authors: Gauna Matías , Martinez Juan , Conconi María , Suárez Gustavo , Rendtorff Nicolás
Published: June 2021

The effect of the TiO2 addition in the ceramic processing of dense zircon
materials from zircon fine powders was established. The addition of TiO2
(5-10 wt%) permitted to obtain dense ceramics at lower temperatures (100-150
oC below), with comparable mechanical behavior. The thermochemical processes
were described after a multi-technique experimental approach, which included
a sintering analysis, powder X-Ray diffraction analysis (XRD), scanning
electronic microscopy (SEM) and Vickers hardness of the polished dense
obtained ceramics. After 1400 oC heating programs, the added TiO2 acts as a
sintering aid with no important chemical reactions, and presented improved
mechanical behavior in comparison with pure zircon ceramics. On the other
side, in samples fired at 1500 oC, TiO2 partially (?50 %) reacts with
zircon, forming ZrTiO4, while the formed SiO2 goes to the grain boundaries.
Samples with 5 wt% TiO2 present better mechanical behavior than the ones
with 10 wt%. The performed mechanical characterization indicates the merits
of the material processed by this inexpensive processing route. Developed
density, hardness (?10 GPa) and fracture toughness (?2 MPa.m-1/2) are
comparable with the best figures reported.