bluuebunny/crossref_metadata_2025 huggingface dataset:
Modelado de idoneidad ambiental en la identificación de sitios potenciales para la toma de datos dendrocronológicos
Authors: Manzanilla Quiñones Ulises , Delgado-Valerio Patricia , Pedraza-Santos Martha Elena , Molina-Sánchez Agustín
Published: February 2023

Actualmente, existen pocos estudios que involucran el modelamiento espacial del ambiente donde crecen los árboles en la identificación de sitios potenciales para la toma de datos dendrocronológicos en México. El presente estudio se encargó de modelar la idoneidad ambiental con la finalidad de identificar sitios potenciales para la toma de datos dendrocronológicos de pináceas de Michoacán, México. A partir de registros de Global Biodiversity Information Facility (GBIF) y del herbario del Instituto de Biología (MEXU) de la Universidad Nacional Autónoma de México, de observaciones de campo y de variables biofísicas, se modeló la idoneidad ambiental de 15 pináceas de Michoacán. Del total de los datos, 75% se emplearon para entrenar y 25% para validar los modelos en MaxEnt. La evaluación de los modelos se realizó mediante las pruebas de AUC, Roc parcial y Z. La identificación de los sitios potenciales se efectuó mediante la localización de las áreas predichas por los modelos dentro de los municipios y las áreas naturales protegidas de Michoacán. Los resultados de las pruebas AUC, Roc parcial y Z presentaron un desempeño bueno y confiable (p < 0.01). Las variables que más influyeron en la identificación de los sitios potenciales para la toma de datos dendrocronológicos fueron Bio7, Bio17, Bio19, Bio16 y Bio8. Las superficies estimadas de idoneidad ambiental fueron de 753.97 ha a 166 689.35 ha. Doce de quince especies se localizan en Tancítaro, Uruapan y Nuevo Parangaricutiro, específicamente dentro del Pico de Tancítaro, donde se tiene un potencial de nueve especies. La presente propuesta pretende emplear los modelos de distribución potencial como una herramienta auxiliar en la identificación de sitios potenciales para la toma de datos dendrocronológicos.
As “mulas” e o transporte de drogas para presídios
Authors: Barrêto Nóbrega de Lucena Mariana
Published: February 2023

No Brasil, a atividade de transportar drogas ilícitas consigo ou dentro do próprio corpo para dentro de presídios, exercida pelas chamadas “mulas”, é responsável por parte relevante do encarceramento feminino. Entretanto, é bastante escassa a literatura específica acerca das dinâmicas sociais e dos aspectos jurídicos relacionados a essa atividade. Buscou-se na América Latina trabalhos que tratassem de situação semelhante e, ainda que também com pouco conteúdo sobre o assunto, foram encontrados alguns estudos a respeito da prática na Costa Rica, país que, em 2013, reformou sua legislação de drogas e reduziu a pena antes prevista para esses casos. Com o fim de dar suporte teórico ao estudo do tema no Brasil e de problematizar o tratamento jurídico aqui concedido, este artigo traz alguns dos principais aspectos sociojurídicos a respeito do tema na Costa Rica, para que sirva de referência aos futuros estudos brasileiros e às discussões jurídicas que pretendam tratar sobre o mesmo fenômeno.
The Social Justice and Human Rights Benefits of Domestic Renewable Energy
Authors: Fagan Paul
Published: February 2023

Focusing upon the United Kingdom reveals that centralised provisions of energy have historically failed to uphold standards of human rights. Even if a transition is made to renewable energy, existing centralised distribution systems cannot promise improvement. This work would recommend the transition to domestic renewables, whereby energy is harnessed and used in situ, as it may support the more desirable notion of social justice with regard to energy usage. Domestic renewables are likely to become an inevitability, as the equipment becomes both more affordable and efficient; this may already be occurring in some developing societies, where domestic renewables are attractive to sectors of the society who are off-grid.
Destronque
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia),   Corporación Colombiana de Investigación Agropecuaria, (Colombia)
Published: February 2023

Para el destronque del cultivo de plátano, se deben tener en cuenta las siguientes recomendaciones.
Fumigación de maíz y soya
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia),   Corporación Colombiana de Investigación Agropecuaria, (Colombia)
Published: February 2023

Para el óptimo desarrollo de un cultivo de maíz y soya, Corpoica recomienda la fumigación como buena práctica de manejo.
Almacenamiento de maracuyá
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia),   Corporación Colombiana de Investigación Agropecuaria, (Colombia)
Published: February 2023

Tanto para el consumo como para la agroindustria, el cultivo de maracuyá aumenta su producción. En este video se muestra su almacenamiento y condiciones específicas.
Invernadero de alta tecnología: proyecto nacional de agricultura protegida
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia)
Published: February 2023

En Rionegro (Departamento de Antioquia) el Ministro de Agricultura inauguró un invernadero de alta tecnología, que hace parte de un proyecto nacional de agricultura protegida.
Antracnosis en el cultivo de mora
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia),   Corporación Colombiana de Investigación Agropecuaria, (Colombia)
Published: February 2023

El cultivo de mora es usualmente atacado por diferentes enfermedades que afectan la calidad de la fruta, produciendo los subniveles de producción.
Clinic-Integrated Smartphone App (JomPrEP) to Improve Uptake of HIV Testing and Pre-exposure Prophylaxis Among Men Who Have Sex With Men in Malaysia: Mixed Methods Evaluation of Usability and Acceptability
Authors: Shrestha Roman , Altice Frederick L , Khati Antoine , Azwa Iskandar , Gautam Kamal , Gupta Sana , Sullivan Patrick Sean , Ni Zhao , Kamarulzaman Adeeba , Phiphatkunarnon Panyaphon , Wickersham Jeffrey A
Published: February 2023

Background

HIV disproportionately affects men who have sex with men (MSM). In Malaysia, where stigma and discrimination toward MSM are high, including in health care settings, mobile health (mHealth) platforms have the potential to open new frontiers in HIV prevention.

Objective

We developed an innovative, clinic-integrated smartphone app called JomPrEP, which provides a virtual platform for Malaysian MSM to engage in HIV prevention services. In collaboration with the local clinics in Malaysia, JomPrEP offers a range of HIV prevention (ie, HIV testing and pre-exposure prophylaxis [PrEP]) and other support services (eg, referral to mental health support) without having to interface face to face with clinicians. This study evaluated the usability and acceptability of JomPrEP to deliver HIV prevention services for MSM in Malaysia.

Methods

In total, 50 PrEP-naive MSM without HIV in Greater Kuala Lumpur, Malaysia, were recruited between March and April 2022. Participants used JomPrEP for a month and completed a postuse survey. The usability of the app and its features were assessed using self-report and objective measures (eg, app analytics, clinic dashboard). Acceptability was evaluated using the System Usability Scale (SUS).

Results

The participants’ mean age was 27.9 (SD 5.3) years. Participants used JomPrEP for an average of 8 (SD 5.0) times during 30 days of testing, with each session lasting an average of 28 (SD 38.9) minutes. Of the 50 participants, 42 (84%) ordered an HIV self-testing (HIVST) kit using the app, of whom 18 (42%) ordered an HIVST more than once. Almost all participants (46/50, 92%) initiated PrEP using the app (same-day PrEP initiation: 30/46, 65%); of these, 16/46 (35%) participants chose PrEP e-consultation via the app (vs in-person consultation). Regarding PrEP dispensing, 18/46 (39%) participants chose to receive their PrEP via mail delivery (vs pharmacy pickup). The app was rated as having high acceptability with a mean score of 73.8 (SD 10.1) on the SUS.

Conclusions

JomPrEP was found to be a highly feasible and acceptable tool for MSM in Malaysia to access HIV prevention services quickly and conveniently. A broader, randomized controlled trial is warranted to evaluate its efficacy on HIV prevention outcomes among MSM in Malaysia.

Trial Registration

ClinicalTrials.gov NCT05052411; https://clinicaltrials.gov/ct2/show/NCT05052411

International Registered Report Identifier (IRRID)

RR2-10.2196/43318
Iterative Development, Validation, and Certification of a Smartphone System to Assess Neonatal Jaundice: Development and Usability Study (Preprint)
Authors: Aune Anders , Vartdal Gunnar , Jimenez Diaz Gabriela , Gierman Lobke Marijn , Bergseng Håkon , Darj Elisabeth
Published: February 2023

BACKGROUND

Medical device development is an area facing multiple challenges, resulting in a high number of products not reaching the clinical setting. Neonatal hyperbilirubinemia, manifesting as neonatal jaundice (NNJ), is an important cause of newborn morbidity and mortality. It is important to identify infants with neonatal hyperbilirubinemia at an early stage, but currently there is a lack of tools that are both accurate and affordable.

OBJECTIVE

This study aimed to develop a novel system to assess the presence of NNJ. The device should provide accurate results, be approved as a medical device, be easy to use, and be produced at a price that is affordable even in low-resource settings.

METHODS

We used an iterative approach to develop a smartphone-based system to detect the presence of NNJ. We performed technical development, followed by clinical and usability testing in parallel, after which we initiated the regulatory processes for certification. We updated the system in each iteration, and the final version underwent a clinical validation study on healthy term newborns aged 1 to 15 days before all documentation was submitted for conformity assessment to obtain Conformité Européenne (CE) certification. We developed a system that incorporates a smartphone app, a color calibration card, and a server.

RESULTS

Three iterations of the smartphone-based system were developed; the final version was approved as a medical device after complying with Medical Device Regulation guidelines. A total of 201 infants were included in the validation study. Bilirubin values using the system highly correlated with total serum or plasma bilirubin levels (r=0.84). The system had a high sensitivity (94%) to detect severe jaundice, defined as total serum or plasma bilirubin >250 µmol/L, and maintained a high specificity (71%).

CONCLUSIONS

Our smartphone-based system has a high potential as a tool for identifying NNJ. An iterative approach to product development, conducted by working on different tasks in parallel, resulted in a functional and successful product. By adhering to the requirements for regulatory approval from the beginning of the project, we were able to develop a market-ready mobile health solution.
Evolution of Public Attitudes and Opinions Regarding COVID-19 Vaccination During the Vaccine Campaign in China: Year-Long Infodemiology Study of Weibo Posts (Preprint)
Authors: Hong Yimin , Xie Fang , An Xinyu , Lan Xue , Liu Chunhe , Yan Lei , Zhang Han
Published: February 2023

BACKGROUND

Monitoring people’s perspectives on the COVID-19 vaccine is crucial for understanding public vaccination hesitancy and developing effective, targeted vaccine promotion strategies. Although this is widely recognized, studies on the evolution of public opinion over the course of an actual vaccination campaign are rare.

OBJECTIVE

We aimed to track the evolution of public opinion and sentiment toward COVID-19 vaccines in online discussions over an entire vaccination campaign. Moreover, we aimed to reveal the pattern of gender differences in attitudes and perceptions toward vaccination.

METHODS

We collected COVID-19 vaccine–related posts by the general public that appeared on Sina Weibo from January 1, 2021, to December 31, 2021; this period covered the entire vaccination process in China. We identified popular discussion topics using latent Dirichlet allocation. We further examined changes in public sentiment and topics during the 3 stages of the vaccination timeline. Gender differences in perceptions toward vaccination were also investigated.

RESULTS

Of 495,229 crawled posts, 96,145 original posts from individual accounts were included. Most posts presented positive sentiments (positive: 65,981/96,145, 68.63%; negative: 23,184/96,145, 24.11%; neutral: 6980/96,145, 7.26%). The average sentiment scores were 0.75 (SD 0.35) for men and 0.67 (SD 0.37) for women. The overall trends in sentiment scores showed a mixed response to the number of new cases and significant events related to vaccine development and important holidays. The sentiment scores showed a weak correlation with new case numbers (R=0.296; P=.03). Significant sentiment score differences were observed between men and women (P<.001). Common and distinguishing characteristics were found among frequently discussed topics during the different stages, with significant differences in topic distribution between men and women (January 1, 2021, to March 31, 2021: χ23=3030.9; April 1, 2021, to September 30, 2021: χ24=8893.8; October 1, 2021, to December 31, 2021: χ25=3019.5; P<.001). Women were more concerned with side effects and vaccine effectiveness. In contrast, men reported broader concerns around the global pandemic, the progress of vaccine development, and economics affected by the pandemic.

CONCLUSIONS

Understanding public concerns regarding vaccination is essential for reaching vaccine-induced herd immunity. This study tracked the year-long evolution of attitudes and opinions on COVID-19 vaccines according to the different stages of vaccination in China. These findings provide timely information that will enable the government to understand the reasons for low vaccine uptake and promote COVID-19 vaccination nationwide.
Application of Artificial Intelligence in Geriatric Care: Bibliometric Analysis (Preprint)
Authors: Wang Jingjing , Liang Yiqing , Cao Songmei , Cai Peixuan , Fan Yimeng
Published: February 2023

BACKGROUND

Artificial intelligence (AI) can improve the health and well-being of older adults and has the potential to assist and improve nursing care. In recent years, research in this area has been increasing. Therefore, it is necessary to understand the status of development and main research hotspots and identify the main contributors and their relationships in the application of AI in geriatric care via bibliometric analysis.

OBJECTIVE

Using bibliometric analysis, this study aims to examine the current research hotspots and collaborative networks in the application of AI in geriatric care over the past 23 years.

METHODS

The Web of Science Core Collection database was used as a source. All publications from inception to August 2022 were downloaded. The external characteristics of the publications were summarized through HistCite and the Web of Science. Keywords and collaborative networks were analyzed using VOSviewers and Citespace.

RESULTS

We obtained a total of 230 publications. The works originated in 499 institutions in 39 countries, were published in 124 journals, and were written by 1216 authors. Publications increased sharply from 2014 to 2022, accounting for 90.87% (209/230) of all publications. The United States and the International Journal of Social Robotics had the highest number of publications on this topic. The 1216 authors were divided into 5 main clusters. Among the 230 publications, 4 clusters were modeled, including Alzheimer disease, aged care, acceptance, and the surveillance and treatment of diseases. Machine learning, deep learning, and rehabilitation had also become recent research hotspots.

CONCLUSIONS

Research on the application of AI in geriatric care has developed rapidly. The development of research and cooperation among countries/regions and institutions are limited. In the future, strengthening the cooperation and communication between different countries/regions and institutions may further drive this field’s development. This study provides researchers with the information necessary to understand the current state, collaborative networks, and main research hotspots of the field. In addition, our results suggest a series of recommendations for future research.
A ciberviolência em práticas textuais do ambiente digital
Authors: Brito Mariza Angélica Paiva , Cabral Ana Lúcia Tinoco , Silva Ananias Agostinho da
Published: February 2023

A tecnologia, conforme mostra Paveau (2021), vem favorecendo uma explosão criativa de textos coproduzidos com a máquina, o que sugere como homem e máquina estão social e individualmente relacionados. Neste artigo, nosso objetivo é tratar, sobretudo, do fenômeno da ciberviolência, que, para a autora, são acontecimentos discursivos morais desencadeados por enunciados violentos relacionados à noção de decência de uma época, de uma cultura e de um espaço. Tais gestos linguageiros ciberviolentos se ritualizam e se modificam o tempo todo, em negociações permanentes. A partir de um exemplário coletado em redes sociais, pretendemos refletir sobre essas relações ao analisar as marcas textuais da ciberviolência. Queremos demonstrar que, assim como em qualquer interação, os gestos ciberviolentos dependem das características do auditório, do gênero, do contrato comunicativo, das modalidades argumentativas e de todos os modos de organização textual, dentre os quais destacamos os processos referenciais.
Um recorte do mundo na mídia sob o olhar da Semiolinguística
Authors: Pauliukonis Maria Aparecida Lino , Monnerat Rosane Santos Mauro
Published: February 2023

Este artigo tem como proposta discutir o conceito de texto como discurso sob fundamentos da Teoria Semiolinguística (CHARAUDEAU, 2006, 2007, 2008, 2010), uma das vertentes da Análise do Discurso de base interativo-comunicacional. Um dos objetivos é analisar como se dá a apreensão dos sentidos de um texto, tomando por base o exame de operações discursivas realizadas pelos sujeitos enunciadores em uma situação social específica e regidos por um contrato comunicativo. Para tanto, pretende-se analisar o processo enunciativo presente em uma reportagem jornalística, intitulada “Sob comando Talibã, Afeganistão volta a ter música como tabu e artistas silenciados”, publicada por meio digital, no jornal Gazeta Brasil, no dia 22/8/2021, não apenas verificando como se dá a criação da imagem do (Tu) destinatário e sua captação por diversos meios patêmicos (pathos), como também destacando os índices de subjetividade que são mais frequentes, responsáveis pela adesão do leitor. Como complemento à temática do texto noticioso, far-se-á a apresentação de duas fotos de grafites de autoria da artista afegã Shamsia Hassani, cujo trabalho centraliza a opressão da mulher na sociedade afegã atual, sobretudo após a tomada do poder pelos talibãs em agosto de 2021.
Associação verbo-gestual na construção referencial no discurso docente
Authors: Ranieri Thaís Ludmila da Silva
Published: February 2023

O presente trabalho tem por objetivo mostrar a articulação verbo-gestual na construção referencial no discurso docente. Para isso, partimos do entendimento de que as práticas de uso da linguagem se dão em uma articulação multimodal (NORRIS, 2001; KRESS et al., 2001). Por sua vez, a referenciação também passa a ser vista como uma atividade multimodal (MORATO, 2001; MONDADA, 2005; BENTES, RIOS, 2005; CUSTÓDIO FILHO, 2011; RAMOS, 2012; RANIERI, 2015). Para tanto, contamos com uma pesquisa de cunho qualitativo e multimodal (NORRIS, 2001; KRESS et al., 2001), tendo por corpus recortes de aulas videogravadas. Nossas análises mostraram que, no processo referencial, verbo e gesto se articulam em torno da retomada dos referentes no discurso do professor, tendo em vista não só os aspectos discursivos, mas também os didáticos.
Multimodalidade e contexto: problemas, assunções e hipóteses
Authors: Farhat Theodoro C.
Published: February 2023

Tomando como base a orientação paradigmática e sociossemiótica oferecida pela Teoria Sistêmico-Funcional, este artigo explora a seguinte questão: assumindo uma relação de constituição mútua entre texto e contexto de situação, como isso se dá nos artefatos multimodais? Por exemplo, uma imagem pode realizar os mesmos elementos culturais que um enunciado verbal (e vice-versa)? Para sugerir algumas vias de resposta, examinaremos como as dimensões globais de estratificação, instanciação e metafunção podem explicitar os elementos que estão em jogo quando se enquadram as relações entre linguagem e contexto, assim como as consequências de tais teorizações para a compreensão da multimodalidade como fenômeno sociossemiótico. A isso se segue uma ilustração analítica e, enfim, apresentamos considerações finais sobre questões de que pesquisas futuras podem se ocupar.
Compreender o não visível: um convite à leitura de imagens e imaginários em tiras
Authors: Cardoso Eveline Coelho , Paula Anabel Medeiros Azerêdo
Published: February 2023

A tira inscreve-se no domínio discursivo midiático como um gênero proveniente do hipergênero quadrinho (RAMOS, 2009a, 2009b). Trata-se de uma produção verbo-visual flexível, não raramente apenas não-verbal, que pode ser um trunfo em sala de aula, por mobilizar ativamente recursos imagéticos e conhecimentos de mundo. Segundo Charaudeau (2013b), o texto visual parece decifrar-se naturalmente e não exigir aprendizagem sistemática, porém, requer saberes específicos de conhecimento e de crença para a construção de seu sentido. Considerando que tais saberes estruturam os imaginários sociodiscursivos subjacentes a toda representação do mundo mediada pela linguagem (CHARAUDEAU, 2007, 2013a), o presente trabalho investiga sua incidência no processo de interpretação/compreensão de quatro peças “mudas” (POSTEMA, 2018), de autoria dos cartunistas brasileiros Laerte Coutinho e Alexandre Beck. A partir da descrição e análise do corpus, evidencia-se a importância do processo inferencial interdiscursivo, que revela os imaginários sociodiscursivos constituintes do texto, relacionados ao propósito intencional de captação do leitor para determinação do ponto de vista. Espera-se, assim, fornecer subsídios para amparar estratégias de formação de leitores mais competentes, capazes de articular semanticamente o visível e o não visível dos textos.
Multissemiose e discurso religioso: análise semiótica do texto escultórico de Nossa Senhora Aparecida
Authors: Azevedo Renan Ramires de , Silva Sueli Maria Ramos da
Published: February 2023

O presente artigo é um trabalho de caráter qualitativo-interpretativista e, com intuito de identificar o uso de multissemioses nas práticas sociais contemporâneas, seguindo descrições teóricas diversas (KRESS; VAN LEEUWEN, 2001; ELIAS, 2016; MACAGNO; PINTO, 2021), se arquiteta sobre as estruturas teóricas dos estudos semióticos discursivos, mais especificamente, sobre a vertente da semiótica plástica que considera a análise de semioses visuais. Para atingirmos tais propósitos, o objetivo específico do presente trabalho é, pois, apreender, por meio da análise, os possíveis efeitos de sentidos da imagem religiosa de Nossa Senhora da Conceição Aparecida, presente, enquanto texto escultórico, no espaço sagrado do Santuário Nacional de Aparecida (SP), associado assim, como um trabalho analítico de um texto multimodal religioso, visual, para além da forma verbal. A justificativa do presente corpus se dá por dois principais motivos: a) o papel sociocultural e religioso de santa tida como Padroeira do Brasil; b) a necessidade e o ineditismo da presente análise, uma vez que não houve produções do âmbito da semiótica acerca de determinada representação escultórica. Para isso, nossa metodologia analítica se desenvolve pelo processo teórico-metodológico das categorias do plano de expressão visual da semiótica plástica (PIETROFORTE 2007, 2018), categorias essas que garimpam os efeitos de sentidos por meio das cores, formas e posições do objeto. Dessa maneira, esperamos ser possível ampliar os estudos no âmbito da semiótica e do discurso religioso, de modo que seja possível compreender, por meio das evidências do texto escultórico, que a imagem notabiliza, possíveis relações de sentido entre divindade e humanidade.
A Review on Experimental Study to Reduce Carbonation Effect on Concrete
Authors: Wadile Mohit , Joshi Prof. Hemant , Pawar Prof. Ramatai
Published: February 2023

Abstract: In this paper the authors have reviewed the carbonation studies which are a vital durability property of concrete. One of the major causes for deterioration and destruction of concrete is carbonation. The mechanism of carbonation involves the penetration carbon dioxide (CO2) into the concrete porous system to form an environment by reducing the pH around the reinforcement and initiation of the corrosion process. The paper also endeavours to focus and elucidate the gravity of importance, the process and chemistry of carbonate and how the various parameters like water/cement ratio, curing, depth of concrete cones, admixtures, grade of concrete, strength of concrete, porosity and permeability effect carbonation in concrete. The role of Supplementary Cementitious Materials (SCMs) like Ground granulated Blast Furnace Slag (GGBS) and Silica Fume (SF) has also been reviewed along with the influence of depth of carbonation
Diagnosis of Chronic Brain Syndrome Using Deep Learning
Authors: Srija Pentyala , Rahul Manchala , Reddy Mamidi Manish
Published: February 2023

Abstract: Brain tumours, which grow within the brain or spread from other secondary tumours elsewhere in the body, have been one of the top causes of death in both adults and children in recent years. Patients can benefit from more effective treatment options if cancers are diagnosed early. Traditional feature extraction approaches concentrate on either low-level or high-level features, with some hand crafted features used to bridge the gap. By encoding/combining low-level and high-level features, a feature extraction framework can be designed to close this gap without employing handcrafted features. Deep learning is extremely powerful for feature representation because it can completely describe low-level and high-level information while also embedding the feature extraction phase in the self-learning process. A computerised technique for locating and segmenting brain tumours could help doctors make faster and more accurate diagnoses. In this paper, we propose a deep learning model that uses the VGG16 and VGG19 architectures to detect and localise cancers in MRI-based pictures. The transfer learning model was able to learn froma small number of photos and achieve a test accuracy of 92 percent for detection and a mean average precision score of 90.14 percent for segmentation.
PID Controller for DC-DC Converter under Dynamic Load Change in Photovoltaics based Low-Voltage DC Microgrid
Authors: Setiawan Made Andik , Hidayat Fahmi , Sari Ela
Published: February 2023

Today, DC Microgrid gain more attraction due to increasing electronic digital devices application such smart-phones, smart-tvs, and other digital apparatus which are operated in DC form. In the common grid, the electric power from AC source is converted to DC voltage for powering the digital devices as load. Hence, there are power conversions from AC-DC and potentially loss energy during conversions. DC Microgrid consisted of sources, loads, distribution lines and energy storages. In small capacity DC Microgrid, the stability of the system is vulnerable by dynamic load change. During load demands fluctuations, the DC Microgrid voltage is also dynamically fluctuated and can reach over the designated rate. To solve this problem, the PID controller is introduced in the DC-DC converter for maintaining the voltage rate at designated value regardless the load demands. In this paper, the DC Microgrid is consisted of photovoltaics as DC sources, XL-6019 as DC-DC converter, Arduino as controller, voltage and current sensors, distribution lines and loads. The proposed method is evaluated via experimental results. The responses of the proposed method in the DC Microgrid system are presented, evaluated, discussed, and compared between with and without applied method. The experimental results indicate that the proposed method has ability to reduce the voltage profile fluctuations during load demands changes and in short time.
Sensor Fusion using Model Predictive Control for Differential Dual Wheeled Robot
Authors: Sudianto Achmad Imam , Muslim Muhammad Aziz , Rusli Moch
Published: February 2023

Every mobile robot mission starts with the robot being moved to the task site. From there, the robot executes its tasks. A control system is required to move the mobile robot's actuator (which may be in the shape of wheels or legs) and comprehend the environment around the robot to perform these movements (perception). This research aims to develop a technique to control a robot’s movement while detecting obstacles and distances toward an object. The robot is equipped with LIDAR and a camera to perform these tasks. The control is divided into two major parts, low-level and high-level controller. As part of a low-level controller robot, the Model Predictive Control (MPC) method is proposed to help with the control of the wheel while the Artificial Neural Network (ANN) approach to use in this study to identify obstacles and the Convolutional Neural Network (CNN) method for detecting objects, both ANN and CNN as a control for high-level part of the robot. The results of this study can prove that CNN can help detect existing objects with a value of 45% for detecting some objects. The obtained result from the MPC method, which has been combined with an ANN as an obstacle detector, is that the smaller the horizon value, the shorter the time needed to reach the desired coordinates with the result being 45 seconds.
Shear resistance of self-stressed elements without transverse reinforcement and with longitudinal bars made of polymer composites. Theoretical background
Authors: Tur Viktar V. , Varabei Aliaksandr P.
Published: February 2023

Introduction. The problem of shear resistance of reinforced concrete elements without transverse reinforcement remains, as before, one of the most controversial in the theory of concrete structures. The interest in the problem arose anew due to the use of polymer composite (FRP) bars as longitudinal reinforcement in concrete structures. Models of shear resistance, included in the regulatory documents and formulated as suggestions in terms of elements reinforced with steel bars and FRP bars, are considered. It is shown that the critical shear crack theory (CSCT) can be adopted as a basis for formulating a model of shear resistance of FRP-reinforced elements. However, its provisions cannot be applied without appropriate adjustments, in particular, regarding the determination of the width of critical crack openings.

Materials and methods. To determine the shear strength of self-stressed concrete elements reinforced with FRP bars, a modified model was developed. As a result of an iterative procedure, this model makes it possible to determine an individual contribution of each of its main components to the total shear strength, taking into account the shape of a potential inclined crack, adopted in accordance with provisions of the Critical Shear Crack Theory (CSCT), as well as the width of the inclined crack opening at the level of longitudinal reinforcement, determined according to the bond-slip law for FRP bars.

Results. A modified mechanical shear resistance model of self-stressed concrete elements reinforced with polymer composite bars was developed. Its difference is that, in addition to the influence of initial self-stress, the bond law for longitudinal reinforcements made of FRP is taken into account (the modified bond-slip law) when cracking parameters are determined in the support zone. An iterative procedure is proposed for calculating the components and the total shear strength of elements made of concrete (including expansive concrete) without transverse reinforcement and with longitudinal reinforcement made of FRP bars.

Conclusions. The shear resistance model proposed for flexible self-stressed elements, reinforced with FRP bars, conveys the physical essence of the shear phenomenon and is applicable to various cases and loading patterns.
An experimental and theoretical approach to assessing the structure of fine-grained modified concretes
Authors: Dmitrieva Maria A. , Kogai Alina D. , Leitsin Vladimir N. , Tovpinets Aleksandr O. , Shinyaeva Maria V.
Published: February 2023

Introduction. The development of approaches to assessing structural characteristics of multicomponent modified concretes using non-destructive testing methods at all stages of hydration is a relevant means focused on ensuring optimal rheological and strength characteristics of concretes.

Materials and methods. Modified fine-grained concrete was analyzed as the material under study, since its composition meets the requirements of additive technologies applied in the construction industry. Modification was implemented by introducing additives and mechanically activating the initial cement-sand composition. The strength of resulting specimens was controlled as of the onset of curing. Structure formation was studied using a computed tomography scanner.

Results. A tomography data processing approach was developed to evaluate the modified concrete’s structure. Key aspects of the stage-by-stage processing of specimens’ images were identified and a solution was obtained for determining the threshold values of correspondence between image shades having different density structures. In the course of compa­ring the results of the strength and structure study, the value of the percentage ratio of inclusions was obtained for various densities during the curing process.

Conclusions. The proposed data acquisition approach contributes to development of further research in this area; it can become a stage in developing a new concrete structure analysis method. The study of specimens at early curing stages in combination with non-destructive control methods contributes to (1) development of rapid assessment techniques, applied to the quality of materials, and (2) an efficiency increase in the process of development.
Antioxidant activity of ten grades of Indonesia black tea (Camellia sinensis (L.) O. Kuntze) liquor
Authors: Sudaryat Yayat , Kusmiyati Mimin , Pelangi Citra Ratu , Rustamsyah A , Rohdiana Dadan
Published: February 2023

Tea is one kind of plant that is popular as a beverage. These plants contain antioxidant potential of flavonoids derived from polyphenol compounds. The research aimed to examine the antioxidant activity and to determine the con-tent of total phenols and total flavonoids from ten grades of Indonesian black tea liqour. Antioxidant activity was measured by the method of free radical scavenging by DPPH, total phenol content measured by Follin-Ciocalteu method, and total flavonoid content was measured by the method of AlCl3. The results of this research showed that The highest total phenol content contained in Dust III withÂ 225,80 mgGAE/100 g and the lowest content is BTL with 111,26 mgGAE/100 g. The test results showed that BBL has the highest total flavonoid content with 0,151 mg/g, while the lowest is BTL flavonoid with 0,086 mg/g. Meanwhile the highest antioxidant activity of ten grade of Indonesian black tea infusion obtained by Dust I, with IC50 97,00 Î¼g/ml. Meanwhile the lowest antioxidant activity with IC50 178,56 Î¼g/ml was obtained by BTL.
The oxidation reaction of quinine by potassium permanganate (KMnO4)
Authors: Rosalina Reny , Alni Anita , Mujahidin Didin , Santoso Joko
Published: February 2023

Quinine was known widely as malarial drug and a bitter taste ini soft drink. Recently, quinine have been also applied in organo-catalysis process, separation and purification of chiral compounds from enantiomeric mixture by diasteromeric salt crystallization and chiral chromatography. Quinine contains various functional groups which easily transforms by oxidations. This research was to study the oxi-dation reaction of quinine by using potassium permanganate (KMnO4) as oxidator. The KMnO4 oxidation carried out under acidic con-ditions. The separation and purification of pro-ducts were done by radial chromatography with chloroform : metanol : tri ethyl amine (9:1:0.1) as eluent. The structure of products were cha-racterized by spectroscopic data including: in-frared spectroscopy, NMR, and mass spectro-metry as quinine-1-N-oxide and quininal.
Comparison of some exogeneous solubillizing phosphate bacteria on Andisol as Indonesia dominant native tea soil
Authors: Setiawati Mieke Rochimi , Pranoto Eko
Published: February 2023

Tea was planting an upland area with Andisol as the dominant soil ordo. Andisol has a special characteristic i.e. low soil pH and it has more mineral that causing low of soil phos-phate soluble, especially for tea plants, there-fore the rule of solubilizing phosphate bacteria will be needed. Laboratory scale experiments were conducted to study the capability activities of some solubilizing phosphate bacterias name-ly Pseudomonas cepaceae, P. malei, Bacillus mycoides, and B. subtilis. The experiment was arranged in Completely Randomized Design with six treatments and four replications. The result on statistical analysis shown that there were no significant differences in increasing of the soil phosphate soluble. Nevertheless, the treatment D (Bacillus mycoides) produced the highest soil phosphate soluble. The capability of bacteria to increase soil phosphate soluble was depended on its habitat, especially soil pH. Even all of the isolates were the superior solubilizing phosphate bacterias in agricultural food plants with neutral soil pH, but they have not significantly different on Andisol. There-fore, the using of indigenous isolates on tea plant areas was suggested.
Recent advances in nanoengineering of electrode-electrolyte interfaces to realize high-performance Li-ion batteries
Authors: Kim Na-Yeong , Kim Il Gyu , Bornamehr Behnoosh , Presser Volker , Ueda Hiroyuki , Lee Ho-Jin , Cheong Jun Young , Jung Ji-Won
Published: February 2023

A suitable interface between the electrode and electrolyte is crucial in
achieving highly stable electrochemical performance for Li-ion
batteries, as facile ionic transport is required. Recently, intriguing
research and development have been carried out to form a stable
interface between the electrode and electrolyte. Therefore, it is
essential to investigate emerging knowledge and contextualize it. The
nanoengineering of the electrode-electrolyte interface has been actively
researched both at the electrode/electrolyte and interphase levels,
which calls for significant attention. This review presents and
summarizes some recent advances aimed at nanoengineering approaches to
build a more stable electrode-electrolyte interface and assess the
impact of each approach adopted. Furthermore, future perspectives on the
feasibility and practicality of each approach will also be reviewed in
detail. Finally, this review aids in projecting a more sustainable
research pathway for a nanoengineered interphase design between
electrode and electrolyte, which is pivotal for high-performance,
thermally stable Li-ion batteries.
Awareness, actions, and predictors of actions on adverse drug reaction reporting among patients attending a referral hospital in southern highland Tanzania
Authors: Kilonzi Manase , Sirili Nathanael , Mwakawanga Dorkasi L. , Mohamedi Juma Ayubu , Thobias Joseph Matobo , Clement Aurelia , Mwasomola Davance , Mushy Stella E.
Published: February 2023

Purpose: This study assessed the awareness, actions, and
predictors of actions on adverse drug reaction reporting among patients
attending a referral hospital in southern highland Tanzania.
Methods: A hospital-based cross-sectional study was from
January to August 2022 at Mbeya Zonal Referral Hospital (MZRH) in Mbeya,
Tanzania. A total of 792 adult patients with chronic conditions
attending outpatient clinics at MZRH were recruited consecutively. A
semi-structured questionnaire was used to collect demographic
characteristics, ADR awareness, and actions when encountering ADR. Data
were analyzed using the statistical package for social sciences (SPSS)
version 23 and results are summarized using frequency and percentages.
Binary logistic regression was used to assess the predictors associated
with reporting ADR among patients. P-value ≤ 0.05 was considered
statistically significant. Results: Out of 792, 397(50.1%)
were males and 383(48.4%) had a primary education level. Only
171(21.6%) participants previously experienced ADR and 111(14.1%) were
aware that ADR is an unexpected harm that occurs after medication use.
The majority 597(70.3%) of the participants said will report ADR to
healthcare providers, 706(88.9%) prefer reporting ADR to healthcare
providers and 558(69.1%) said patients are not aware of the importance
of reporting ADR. Patients aged below 65 years of age, unemployed ((AOR
(95%CI) =0.4(0.18 – 0.87), self-employed ((AOR(95%CI) =0.5(0.32 –
0.83)), and those who ever encountered ADR ((AOR(95%CI) =0.1(0.05 –
0.11)), were more likely to report the ADR to HCPs compared to the rest.
Conclusions: The majority of patients are not aware of what is
ADR and the importance of ADR reporting. Most of the patients prefer to
report ADR to healthcare providers. We recommend an awareness campaign
to raise awareness of the patients on ADR and other methods of ADR
reporting.
Dual additives for stabilizing Li deposition and SEI formation in anode-free Li metal batteries
Authors: Wu Baolin , Chen Chunguang , Danilov Dmitri , Chen Zhiqiang , Jiang Ming , Eichel Rüdiger-A. , Notten Peter
Published: February 2023

Anode-free Li-metal batteries (AFLBs) are of significant interest to
energy storage industries due to their intrinsically high energy.
However, the accumulative Li dendrites and dead Li continuously consume
active Li during cycling. That results in a short lifetime and low
Coulombic efficiency (CE) of AFLBs. Introducing effective electrolyte
additives can improve the Li deposition homogeneity and solid-state
interphase (SEI) stability for AFLBs. Herein, we reveal that introducing
dual additives, composed of LiAsF6 and FEC, into a commercial carbonate
electrolyte will boost the cycle life and average CE of
NCM||Cu AFLBs. The NCM||Cu AFLBs
with the dual additives exhibit a capacity retention of about 75% after
50 cycles, much higher than those with bare electrolytes (35%). The
average CE of the NCM||Cu AFLBs with additives can
maintain 98.3% over 100 cycles. In contrast, the average CE without
additives rapidly decline to 97% after only 50 cycles. In situ Raman
measurements reveal that the prepared dual additives facilitate denser
and smoother Li morphology during Li deposition. The dual additives
significantly suppress the Li dendrite growth, enabling stable SEI
formation on anode and cathode surfaces. Our results provide a broad
view of developing low-cost and high-effective functional electrolytes
for high-energy and long-life AFLBs.
Diagnostic utility of lung ultrasound in predicting the need for surfactant therapy in preterm neonates with respiratory distress
Authors: Suryawanshi Pradeep , Singh Pari , Patnaik Suprabha , Verma Arjun , Garegrat Reema , Maheshwari Rajesh
Published: February 2023

Objectives: Primary objective was to determine the diagnostic
accuracy of lung ultrasound score (LUS) in predicting the need for
surfactant therapy in preterm neonates (< 34 weeks) with
respiratory distress. Secondary objectives were to correlate LUS with
corresponding oxygen saturation to fraction of inspired oxygen ratio
(SpO2/FiO2), arterial/Alveolar oxygen pressure ratio (a/A]and chest
x-ray (CXR) findings. Working hypothesis: LUS reflects lung
aeration and will correlate with requirement of surfactant in preterm
neonates with respiratory distress. It can be an accurate and timely
predictor for surfactant therapy. Study design: Prospective
observational study carried out at a tertiary level NICU in Western
India in 2022 enrolling 100 neonates <34 weeks gestation with
respiratory distress. Methodology: After initial stabilization
of the neonate, LUS was performed and baseline parameters noted.
Surfactant was administered as per 2019 European guidelines and LUS was
repeated after 6 hours. Results: The mean gestation of enrolled
neonates was 31.06 +/- 2.12 weeks and the mean birthweight was 1412 +/-
391 g. Out of 100 neonates, 40 required surfactant therapy. The cutoff
LUS for surfactant therapy was 7 (area under curve [AUC] 0.977; 95%
CI, 0.947-1; P < 0.001; with sensitivity 93.33%, specificity
92.5%, PPV 94.92%, NPV 90.24%) and the cutoff LUS for second dose of
surfactant was 10 (AUC 0.964; 95% CI, 0.913-1; P < 0.001. The
score decreased by an average 3.24 (2.44 - 4.05) after 6 hours of first
dose and correlated significantly with SpO2/FiO2 ratio (-0.750), a/A
ratio (-0.650) and CXR findings (0.801). Conclusion: LUS ≥ 7
can be considered an accurate marker for surfactant replacement therapy.
Of dolphins, humans, other long-lived animals and Alzheimer’s disease (Commentary on Vacher et al.)
Authors: Pereyra Guadalupe , Bovolenta Paola
Published: February 2023

Alzheimer’s Disease (AD) is a familial or sporadic severe
neurodegenerative disorder that leads to short-term memory impairment
followed by progressive cognitive deterioration of executive functions.
AD frequency is increasing with a consequent socio-economic burden and
there is an urgent need to understand its aetiological complexity, find
reliable animal models and identify effective therapeutic treatments. AD
diagnosis relies on a series of neuropsychiatric criteria and the
detection of two pathognomonic protein aggregates in the brain
parenchyma: amyloid plaques and neurofibrillary tangles. The concurrence
of these aggregates seems to be mostly present in humans. In this issue,
Vacher and colleagues demonstrate the notable coexistence of AP
deposition and hyperphosphorylated tau in the brains of dolphins. Here
we discuss the relevance of this finding and how they could help
understanding AD
Stemphylium lycopersici immobilized in mesoporous of type MCM 48 as biocatalyst for ω-transamination reactions
Authors: Leal Ivana Correa Ramos , Queiroz Maria Sandra Ramos , Silva Glaciela Cristina Rodrigues da , Nyari Nádia Ligianara D. , Souza Rodrigo , Mignoni Marcelo Luis , Dallago Rogerio , Guimarães Denise Oliveira
Published: February 2023

The ability of Stemphylium lycopersici immobilized in MCM 48
zeolite structure as biocatalyst for ω-transamination reactions was
evaluated. The conversion capacity for rac-1-methylbenzylamine,
and also rac-1,2,3,4-tetrahydro-1-naphthylamine was verified in
order to ascertain the potential of this biocatalyst in relation to the
bioconversion of amines with different side chains when using
immobilized crude enzyme extract in zeolite. In this first reaction
(after 24 h), a conversion of 23% to acetophenone and 27% to tetralone
was obtained. Observing the promising values obtained in the kinetic
resolution reactions, an experimental design was carried considering the
amount (mg) out of biocatalyst present in the support and the amount of
ionic liquid used Central Compound Rotational Design (CCRD
complete). After optimization, values close to 36%
conversion were achieved. In the present work, there were performed 25
cycles of 18 h with Zeolite MCM48 with the addition of ionic liquids
(LI). The presence of LI’s helps with stability and still acts as
structure drivers, which may have helped by providing a large number of
recycles. In this analysis, 87% of the initial activity was maintained.
Bicuspid aortic valve caused subaortic stenosis with bulging of valve calcification through subaortic area in a young patient
Authors: Acar Burak , Cakir Ozgur , Dogan Abdullah , Omay Oguz , Sahin Tayfun , Şadan Yavuz , Türköz Riza
Published: February 2023

Bicuspid aortic valve is the most common congenital cause for the
development of aortic valve calcification and stenosis. Calcification
cause valvular stenosis or valvular insufficiency due to coaptation
failure. We report a unique case of calcification of bicuspid valve was
extending to left ventricular outflow tract and attached to
interventricular septum which caused subvalvular stenosis.