bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of the microscopic structure of adhesive splinting constructions containing different chemical nature of reinforcing tapes in their structure
Authors: Starovoytova V. S.
Published: September 2022

Relevance. The questions of research of physical and chemical characteristics of reinforcing tapes, peculiarities of chemical connection of composite material and reinforcing component of the splint, physical indicators of strength of their connection, optimal thickness of composite material for reinforcing tape covering remain not fully studied and require further work in this direction in order to optimize splinting stages of mobile teeth in various clinical situations and nosological forms of diseases. The aim of the study - to study the microscopic structure of splinting constructions containing in their structure reinforcement tapes based on organic and inorganic matrices. Material and research methods. 10 groups of 10 specimens of splinting construction, with different chemical composition of reinforcing tapes, 8 of which were made using tapes based on inorganic matrix, 2 - based on organic. Results of the study. Microscopic examination of the splinting samples showed good integration of the composite polymer matrix into the structure of the tapes in the samples using inorganic matrix-based tapes. Peripheral layer delamination was not detected, pores in the splint thickness were absent or were single, which may be due to silanization of glass fibers incorporated into the thermoplastic polymer and light-curing composite matrix. Conclusion. Resin-impregnated inorganic parallel fiberglass tapes impregnated in the factory showed an advantage compared to woven and braided tapes and unimpregnated tapes.
Evaluation of parasite contamination on toothbrushes in children in Southeastern Brazil.
Authors: Caldeira François Isnaldo Dias , Cardoso Bruna , De Oliveira Luísa Baeta , De Oliveira Daniela Silva Barroso , Machado Barbara Maria de Souza Moreira , Alves Ricardo da Silva , Colombo Fabio Antônio , Nunes Juliana Barbosa , Marques Marcos José
Published: September 2022

Introduction: The toothbrush is an important object for the hygiene of the oral cavity and an effective mechanism to remove the oral waste. Objective: To evaluate the perception of care, storage and parasitic contamination of toothbrushes in children with special health care needs (CSHCN) and children without special health care needs (CWSHCN) in Southern of Minas Gerais State. Material and Methods: This is an observational cross-sectional non-randomized study. The population consisted in 54 children, with age between 7 and 14 years. The questionnaire was distributed to patients to evaluate the perception of care and storage of children’s toothbrushes. Investigation of toothbrushes contamination was performed by parasitological examination and real-time polymerase chain reactions. Results: Regarding the procedures performed after brushing, 50.0% of children with special health care needs (CSHCN) and 56.3% of children without special health care needs (CWSHCN) report washing their brush bristles with water (p <0.001). Both groups did not use an antiseptic solution on toothbrushes. 73.3% of (CSHCN) and 58.7% of (CWSHCN) answered that they use some protection (brush holder and bathroom cabinet) to avoid exposure of brushes to the environment (p <0.001). Conclusion: The children investigated by the study presented good conditions of care and storage of their toothbrushes. No contamination by pathogenic parasites was found during the study period.
Multiplex measurement of proinflammatory cytokines around miniscrews during orthodontic treatment
Authors: Camarena Fonseca Alexandra , Gallegos Salazar Gallegos Salazar , Melgar Gutierrez Jorge Carlos , Inga Peña Rocio , Colarossi Salinas Ana Cecilia , Meneses López Abraham
Published: September 2022

Objetivo: Determinar los niveles de citocinas inflamatorias alrededor de mini-implantes con y sin carga, durante el tratamiento ortodóntico. Material y métodos: Se realizó un estudio descriptivo longitudinal con una muestra de diez mini-implantes. La toma de muestras de saliva y líquido crevicular peri-implantario fue realizada en cuatro tiempos: basal (T0), 24 horas post-inserción (T1), 1 semana post-inserción (T2), 24 horas post-carga (T3). Fueron procesadas mediante una técnica de inmunoensayo y citometría de flujo. Resultados: El análisis de los datos se realizó con el programa SPSS versión 21.0. Para verificar la distribución normal se utilizó la prueba de Kolmogorov-Smirnov, seguida de la prueba ANOVA para comparar y determinar la significancia estadística. Los niveles de mediadores inflamatorios en el líquido crevicular peri-implantario en T1 tuvieron el siguiente orden de valores promedio: IL-8> IL-1β> IL-6> TNF-α> IL-10> IL-12p70. Los valores más altos se encontraron 24 horas post-inserción. Los niveles en saliva fueron menores pero se mantuvo el orden mencionado. Se hallaron diferencias estadísticamente significativas entre grupos para IL-1β e IL-8 en el líquido crevicular peri-implantario. Posteriormente, la prueba post hoc de Scheffe demostró la ausencia de diferencias estadísticamente significativas en la comparación de pares intragrupo de cada mediador. No se encontraron diferencias estadísticamente significativas inter e intragrupo para todos los mediadores inflamatorios evaluados en saliva. Conclusiones: La carga del mini-implante no generó un aumento en la concentración de citocinas mayor que el provocado por la inserción per se. Los niveles más altos se encontraron 24 horas después de la inserción.
Algunas recomendaciones para publicar un artículo científico en una revista de impacto.
Authors: Santos Pérez Yuneisy
Published: September 2022

El artículo científico se define como un informe escrito y publicado que describe resultados originales de una investigación. Al redactar cualquier texto científico es necesario tener en cuenta que es un reflejo de la actividad cognoscitiva del hombre. La forma más reconocida y considerada por muchos, así como la de mayor apoyo social, es la publicación en revistas académicas de alto prestigio. Para ello tiene que existir un constante perfeccionamiento del vocabulario científico y la manera de estructurar el conocimiento que se brinda. Todo experimento debe quedar escrito para que otros investigadores puedan contrastarlo y reproducirlo. De otra forma, los resultados serían imprecisos, efímeros y se terminarían perdiendo. Este artículo de revisión recopila información a partir de la base de datos de Medline/PubMed. Se describen herramientas metodológicas, así como un conjunto de recomendaciones que permitan escribir un artículo científico para que sea admitido en una revista científica de impacto.
Factores clínicos relevantes en el diagnóstico de un colapso posterior de mordida. Una revisión sistemática de reportes de caso 2021.
Authors: Balarezo Razzeto José Antonio , Castilla Camacho Marisol , León Manco Roberto , Meneses López Abraham
Published: September 2022

La presente investigación surge de una inquietud ante la falta de consenso sobre el concepto del colapso posterior de mordida, sobre el cual en la actualidad existe limitada literatura. El Objetivo fue Identificar los factores clínicos relevantes en el diagnóstico de colapso posterior de mordida. Es una revisión sistemática basada en reportes y series de caso. Se consideraron como dimensiones al tejido dentario, oclusión dentaria, tejido muscular, articulación temporomandibular, tejido periodontal y examen radiográfico. De 82 artículos seleccionados inicialmente, se realizó la revisión con 6 artículos, Con los artículos se ordenó la información describiendo cada uno de ellos, siendo las publicaciones entre 1987 y 2020. Podemos concluir que se identificaron los factores clínicos relevantes: pérdida de piezas dentarias, alteración de la dimensión vertical, periodontitis, desviación en la apertura y cierre del ATM, y reabsorción ósea como los más predominantes según las dimensiones de diagnóstico.
Detection of oral biomarkers as a diagnostic tool for orthodontically induced inflammatory root resorption: a literature review
Authors: Camarena Fonseca Alexandra , Meneses López Abraham
Published: September 2022

Orthodontically induced inflammatory root resorption (OIIRR) is one of the most common complications of orthodontic treatment. Historically, only radiographic methods were available, while offering ease of use and accessibility, many limitations exist. Problems of technique, standardization, limited points of view and radiation exposure remain. Resorption can only be detected after a significant portion of the root has been lost (60% to70% mineralized tissue). Moreover, these methods are static and cannot indicate if the process of root resorption has arrested or is ongoing. Recently, oral fluids have been used as a tool for the diagnosis and monitoring of oral and systemic diseases through the detection of biomarkers. The purpose of this review is to describe the scientific evidence related to the prevalence, etiology, the traditional diagnostic methods and the advances in the detection of oral biomarkers through molecular biology for this pathology.
Herramientas digitales en el proceso de aprendizaje semipresencial en la Educación Dental Peruana durante la Pandemia COVID-19.
Authors: Blanco-García Luz Elvira , Blanco-Muñoz Santos , Vicuña-Huaqui Luis Antonio , Meneses- López Abraham , Oseda-Gago Dulio
Published: September 2022

La pandemia del COVID-19 ha generado un vacío pedagógico en la educación dental, que por la naturaleza clínica, práctica y laboratorial de las asignaturas obligó a los docentes a incorporar recursos didácticos digitales novedosos en los que se simulan entornos de aprendizaje que ayudan a fomentar el desarrollo de habilidades y conocimientos en busca de la mejora continua. No obstante, los estudiantes se han visto también en la necesidad de recurrir a plataformas virtuales que le permitan una mayor adaptación a este complejo sistema híbrido de aprendizaje semipresencial. Los hallazgos de la presente revisión, es producto de un estudio exploratorio que tuvo como propósito identificar las principales Tecnologías de la Información y Comunicación y organizarlas según herramientas de interpretación, modelado dinámico, comunicación, colaboración y organización. De esta manera proporcionamos a la comunidad académica una visión del impacto de ellas sobre el proceso de aprendizaje y autoaprendizaje, sus experiencias de uso y la percepción de los beneficios y limitaciones de estas nuevas tecnologías en un contexto actual en estudiantes de Odontología. En la primera parte abordamos el estado de arte sobre los componentes pedagógicos de las TIC, el papel que desempeñan en la educación superior, las características y los estándares que deben cumplir para que se constituyan en herramientas cognitivas aliadas de la educación formal, de manera que permitan la interacción y la gestión del conocimiento de los estudiantes. Seguidamente compartimos los resultados de una encuesta abierta de los estudiantes de pregrado de una Facultad de Odontología Peruana que se realizó como una fase preliminar diagnóstica que se constituyó el punto de partida para la validación de instrumentos de un trabajo de investigación sobre experiencias del uso de las TIC como herramientas digitales y cognitivas de enseñanza y aprendizaje en la educación dental en línea que cuenta con la autorización del Comité de Ética en Investigación de la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos N° 0209; Las respuestas obtenidas muestran los recursos al servicio de su educación formal y científica relacionadas con habilidades propias de usuarios denominados “nativos digitales” motivándolos a ser los protagonistas de su aprendizaje y desarrollo de competencias para un adecuado desempeño profesional.
Glosario básico actualizado de términos odontológicos de endodoncia: Inglés- Español.
Authors: Betancourt García Ana Ibis , Vázquez De León Ana Gloria , Pons López Yahíma
Published: September 2022

La estomatología como rama de las ciencias médicas no escapa al impacto del desarrollo de la ciencia y la técnica donde se crean grandes volúmenes de información científica que en la mayor parte de los casos su divulgación y/o comunicación provienen de países de habla inglesa o se generan en ese idioma, siendo muy necesario para el profesional al permitirle comprender y comunicar mejor la ciencia. Son variados los medios y métodos que el profesional utiliza para apropiarse de dichos conocimientos, los glosarios de términos en inglés de una misma rama o de un mismo campo de estudio son una herramienta válida de trabajo en el aprendizaje y uso de los idiomas al permitir de forma rápida el significado de palabras desde el contexto apropiado. Este glosario se ha concebido como un instrumento de trabajo y de consulta para estudiantes y profesionales en el campo de la Odontología, específicamente en endodoncia, no se pretende exponer todos los vocablos y frases pertenecientes a esta rama sería imposible, se excluyen los términos cuya escritura semeje al español excepto aquellos que su significado no sea el mismo. Recopila términos frecuentes y actuales necesarios para la comprensión de textos en esa rama.
Propiedades mecánicas del hormigón corroído por la lluvia ácida con base en el elemento discreto de partículas (Editado por el Dr. Kimon Christianis, University of Patras, Greece)
Authors:   College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China., Yang Guang , Li Guoxin ,   College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China.
Published: September 2022

Para predecir la durabilidad de la estructura de hormigón y garantizar la seguridad de la vida y la propiedad, se presenta un método para analizar las propiedades mecánicas del hormigón corroído por la lluvia ácida con base en el elemento discreto de partículas. Se diseñaron ocho muestras de prueba de vigas de hormigón pretensado, y luego se obtuvieron muestras de prueba de vigas de hormigón con diferentes tasas de corrosión mediante la simulación de la corrosión por lluvia ácida. La prueba de división de impacto se llevó a cabo con base el elemento discreto de partículas y luego se construyó el modelo mesomecánico de elemento discreto de partículas de hormigón. Los resultados del experimento muestran que el proceso de estrés de la viga de hormigón de prueba después de la corrosión por lluvia ácida incluye tres etapas: desmonoramiento, aumento de la grieta por la carga, trituración y astillado. Después de la corrosión por lluvia ácida, la resistencia a la tracción de división del haz TYL-b (el refuerzo de tracción superior) es la más alta, y la resistencia a la tracción de división del haz TYL-d (el refuerzo de compresión inferior) es la más baja. La tasa de corrosión de la lluvia ácida es inversamente proporcional a la resistencia a la tracción de división del hormigón. La resistencia a la tracción por hendimiento del hormigón después de la corrosión por lluvia ácida obtenida por el método propuesto es coherente con el valor real. Por lo tanto, el método propuesto tiene una alta precisión y un alto valor práctico.
On the Additive and Subtractive Representation of Even Numbers from Primes
Authors: Shehu Ali , Uka Jetmira
Published: September 2022

We demonstrate a new quantitative method to the sieve of Eratosthenes, which is an alternative to the sieve of Legendre. In this method, every element of a given set is sifted out once only, and therefore, this method is free of the Mobius function and of the parity barrier. Using this method, we prove that every sufficiently large even number is the sum of two primes, and that every even number is the difference of two primes in infinitely many ways.
Lipofuscin as the Main Driving Force of Current Age-Related Disease: Justification and Strategies for Removal
Authors: Renteln Michael
Published: September 2022

Lipofuscin is indigestible garbage that accumulates in the autophagic vesicles and cytosol of post-mitotic cells with age. Drs. Brunk and Terman postulated that lipofuscin accumulation is the main or at least a major driving factor in aging. They even posited that the evolution of memory is the reason why we get lipofuscin at all, as stable synaptic connections must be maintained over time, meaning that the somas of neurons must also remain in the same locale. In other words, they cannot dilute out their garbage over time through cell division. Mechanistically, their position certainly makes sense given that rendering a large percentage of a post-mitotic cell’s lysosomes useless must almost certainly negatively affect that cell and the surrounding microenvironment. Here, I explore the possibility that the accumulation of lipofuscin to some extent underlies all other categories of age-related damage as defined by Dr. Aubrey de Grey. I do not think that lipofuscin removal will reverse/prevent all forms of aging, just the major component facing us currently. In this piece, I will review what is known about lipofuscin accumulation from evolutionary and mechanistic standpoints and discuss ways of removing it from non-dividing (or slowly-dividing) cells.
Inevitability and Incompleteness of the Second Law of Thermodynamics in the Expanding Universe
Authors: Kulish Vladimir , Novozhilov Vasily
Published: September 2022

A simple line of reasoning, based on the most fundamental concepts of thermodynamics, yields some intriguing results for a better understanding of the processes occurring in the observable Universe. Gravitational mass must be continuously generated within an expanding thermodynamic system for this system to remain closed. The Second Law is a direct consequence of this production of mass. Simple expressions for the entropy and temperature of the Universe were obtained and the results agree well with observable values. Furthermore, it is demonstrated that the conservation laws within the Universe are independent of its energy density. Based on the solution for the quantum state of the Universe, it is conjectured that the Second Law is incomplete and must be complemented to a conservation law, which takes into account the growth of the amount of information within the Universe. Once the Second Law is complemented to a conservation law, the importance of mass generation within the Universe becomes well pronounced – not only gravitational effects play the role of an organising force, but also the amount of mass within the Universe defines both the amount of information within the Universe and the level of the Universe’s complexity.
Exploring Temporal Dynamics of River Discharge using Univariate Long Short-Term Memory (LSTM) Recurrent Neural Network at East Branch of Delaware River
Authors: Mehedi Md Abdullah Al , Khosravi Marzieh , Yazdan Munshi Md Shafwat , Shabanian Hanieh
Published: September 2022

River flow prediction is a pivotal task in the field of water resource management during the era of rapid climate change. The highly dynamic and evolving nature of the climatic variables e.g., precipitation has a significant impact on the temporal distribution of the river discharge in recent days making the discharge forecasting even more complicated for diversified water-related issues e.g., flood prediction and irrigation planning. To predict the discharge, various physics-based numerical models are used using numerous hydrologic parameters. Extensive lab-based investigation and calibration are required to reduce the uncertainty involved in those parameters. However, in the age of data-driven predictions, several deep learning algorithms showed satisfactory performance in dealing with sequential data. In this research, Long Short-term Memory (LSTM) neural network regression model is trained using over 80 years of daily data to forecast the discharge time series up to 3 days ahead of time. The performance of the model is found satisfactory through the comparison of the predicted data with the observed data, visualization of the distribution of the errors and Root Mean Squared Error (RMSE) value of 0.09. Higher performance is achieved through the increase in the number of epochs and hyper parameter tuning. This model can be transferred to other locations with proper feature engineering and optimization to perform univariate predictive analysis and potentially be used to perform real-time river discharge prediction.
Using GEOBIA and Vegetation Indices to Assess Small Urban Green Areas in Two Climatic Regions
Authors: Popa Ana Maria , Onose Diana Andreea , Sandric Ionut Cosmin , Dosiadis Evangelos A. , Petropoulos George P. , Gavrilidis Athanasios Alexandru , Faka Antigoni
Published: September 2022

The importance of small urban green areas has increased in the context of rapid urbanization and densification of the urban tissue. The analysis of these areas through remote sensing has been limited due to the low spatial resolution of freely available satellite images. We propose a timeseries analysis on 3 m resolution Planet images, using GEOBIA and vegetation indices, with the aim of extracting and assessing the quality of small urban green areas in two different climatic and biogeographical regions – temperate (Bucharest, Romania) and mediterranean (Athens, Greece). Our results have shown high accuracy (over 91%) regarding the extraction of small urban green areas in both cities, across all analysed images. The timeseries analysis showed consistency in location for around 55% of the identified surfaces throughout the entire period. The vegetation indices registered higher values in the temperate region, due to the vegetation characteristics and the planning of the two cities. For the same reasons, the increase in vegetation density and quality, as a result of the distance from the city centre and the decrease in the density of built-up areas is more obvious in Athens. The proposed method provides valuable insights in the distribution and quality of small urban green areas at city level and can represent the ground basis for many analyses, currently limited by poor spatial resolution.
An Approach for Data Privacy Management for Banking Using Consortium Blockchain
Authors: Nabih Shady , fahmy hanan , abdelgaber sayed
Published: September 2022

Banking sectors commit modern working frameworks and models smooth development based on decentralization with keeping money confront in unused ranges and differing activities. Consortium Blockchain Privacy becomes a major concern and the challenge of Most of banking sectors.Development without being hampered being a major concern it can store confirmed, Data privacy includes assuring protection for both insider ad outsider threats therefore access control of Ring signature could help to secure Privacy of inside and outside threats by secure process by RSBAC using CIA triad privacy Confidentiality, Availability, Integrity.This paper proposes a ring signature-based on access control mechanism for determining who a user is and then regulating that person's access to and use of a system's resources. In a nutshell, access control restricts who has access to a system. It also restricts access to system resources to users who have been identified as having the necessary privileges and permissions. The proposed paradigm satisfies the needs of both workflow and non-workflow systems in an enterprise setting. The traits of the conditional purposes, roles, responsibilities, and policies provide the foundation for it. It ensures that internal risks such as database administrators are protected.Finally, it provides the necessary protection in the event that the data is published.
Sustainable Development Strategies of Rainfed Paddy Fields in Central Java, Indonesia: A Review
Authors: Al Viandari Nourma , Wihardjaka Anicetus , Pulunggono Heru Bagus , Suwardi Suwardi
Published: September 2022

Rainfed paddy fields have a great potential to be developed in Indonesia, especially in Central Java. However, water irrigation management, drought stress, pest and disease infestation and low nutrients that affect paddy yield remain the constraints. Unpredictable climate pattern is also a limiting factor in the cultivation of rainfed paddy fields. This narrative review aims to identify and discuss solutions to problems that exist to increase the yield of rainfed paddy fields with several techniques that support sustainable agriculture. This review paper was prepared by collecting government data and interviews with several farmer group leaders as complementary data. Based on field conditions, farmers in rainfed paddy fields provide fertilization inputs that are not following the fertilizer recommendations. Moreover, field conditions with limited water availability have caused paddy cultivating in several locations only once a year with low yields. Water storage can help farmers meet the need for water, especially during dry and water-stress conditions. The farmers also need to pay attention to the appropriate fertilization doses and the use of additional organic matter derived from cultivation residues, which are expected to increase the availability of nutrients in the soil. The use of short-life and drought-resistant varieties can aid in overcoming the problem of crop failure in the middle phase caused by water scarcity. Finally, we identify and emphasize that rainfed paddy fields generally have a limiting factor for water and nutrients and several technologies are needed to contribute to increasing more sustainable paddy yields.
Water Quality Analysis using Pollution Index Method in Klampok Sub-watershed, Semarang Regency, Indonesia
Authors: Suwatanti Eka Putri Sri , Maridi Maridi , Suntoro Suntoro
Published: September 2022

The Klampok Sub-watershed flows in the Semarang Regency, Central Java, Indonesia, located in the upstream part of the Jragung Watershed, used as a source of irrigation. Klampok Sub-watershed experiences environmental pressures in the form of decreasing water quality because of various human activities. For this reason, this study aims to determine the changes in the water quality and pollution index of the Klampok Sub-watershed in 2016 and 2020. The water quality observations were carried out in 2020 utilizing the Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Nitrate, Zinc (Zn) and Copper (Cu) parameters. The laboratory analysis results were compared with water quality standards based on Government Regulation Number 22 of 2021 and the status of water quality based on the pollution index method under the Decree of the Minister of the Environment Number 115 of 2003. The study results showed a change in the quality and index of water pollution in 2016 and 2020. The study results revealed a decrease in the value of water quality on the parameters BOD, COD, Zn and Cu, which indicated that the water quality was improving. Moreover, the Klampok Sub-watershed pollution index decreased in 2016 and 2020 so that the Klampok Sub-watershed had quality criteria for lightly polluted water to moderately polluted to lightly polluted at each sampling point. Therefore, several efforts to control pollution and management of the Klampok Sub-watershed, such as community outreach, water quality monitoring and industrial compliance, are expected to improve so that the Klampok Sub-watershed's sustainability can provide various benefits to the community.
Application Paclobutrazol and Duration of Drought Stress to Flowering Induction in Chokun Orange
Authors: Azizah Zulfa Rahmadita Nur , Sakhidin Sakhidin , Saparso Saparso , Sarjito Agus
Published: September 2022

Induction of flowering is one of the efforts that can extend the production period of Chokun oranges. This study aims to determine the effect of the dose of paclobutrazol (PBZ), duration of drought stress and the combination of treatments that gives the best results on the Chokun orange (Citrus sp.). The research design used was randomized complete block design (RCBD), consisting of 3 replications. The treatment in this study was a combination of the dose of PBZ (control, active ingredient 0.75 g plant-1 and active ingredient 1.5 g plant-1) and duration of drought stress (control, 1, 2 and 3 weeks). The results show that the application of PBZ and duration of drought stress can induce the flowering of citrus plants as seen from the generative shoot variables with a quadratic model on the equation y = -17.778x2 + 31.556x + 26.667 at the optimum dose of 0.89 g plant-1 of active ingredient and 1 week of drought. The dry period of 3 weeks gives the best results seen from variables of the number of flowers and number of fruits. In general, the results suggest that the application of PBZ and duration of drought stress can transfer from the vegetative phase to the generative phase which in turn could induce the flowering of citrus plants.
The Effect of Seaweed (Sargassum sp.) and Plant Extract Combinations on the Growth of Mustard Plant (Brassica juncea L.) Grown in Hydroponic Wick System
Authors: Pangaribuan Darwin Habinsaran , Ginting Yohannes Cahya , Rugayah Rugayah , Oktiya Rosi , Zaheri Echa Dessya
Published: September 2022

Nutrient solution is an important factor for the growth and quality of hydroponic plants; however, the price is getting more expensive. Seaweed is abundantly available along tropical coast. The study was conducted to determine the best combination of extract of brown seaweed (Sargassum sp.) combined with coconut husk, lamtoro leaves, moringa leaves or African leaves that fit to the nutritional quality of AB mix as hydroponic nutrition for mustard plants. This research was conducted in the greenhouse of the Faculty of Agriculture, Universitas Lampung. The design used was a completely randomized design with six replications. The treatments consisted of six types of treatment, namely AB mix nutrition, brown seaweed, seaweed and lamtoro leaf, seaweed and coconut fiber, seaweed and moringa leaf, seaweed and African leaf. Results showed that the organic nutrient solution extracting from the mixture of brown seaweed with lamtoro leaf or coconut fiber or moringa leaf or African leaf has not been able to fit the quality of AB mix nutrition for mustard plants in the hydroponic wick system. However, among those treatments, the best fresh weight of mustard was found on the treatment of the combination between brown seaweed and lamtoro leaf which was 51.08% from total fresh weight from control AB mix.
Soil Drenching with Silicon Improves the Adaptive Response of Tobacco Cultivation under Excess Water Condition
Authors: Sinatrya Almansyah Nur , Soeparjono Sigit , Setiawati Tri Candra
Published: September 2022

Tobacco variety H382 was a cigar type tobacco that has a high economic value and potential as export trade commodity in Indonesia. The development stage of tobacco was very sensitive to water stress, like the water excess. Silicon was one of the most abundant elements in earth crust and has a role in water stress reduction to the plant. The objective of this study was to determine the response of tobacco crop variety H382 with the application of silicon fertilizer to adapt in waterlogging stress condition. This study used a factorial randomized block design with first factor was silicon fertilizer (0, 0.15, 0.30 and 0.45 ml) and second factor was excess water stress treatments (50% to 70%, 70% to 90%, 90% to 110% and 110% to 130% of field capacity). All treatments were replicated three times. The results showed that the addition of 0.45 ml silicon fertilizer to waterlogged tobacco crop could escalate the adaptive response of plant to cope with stress; seen from the increasing of the opened stomata, aerenchyma formation and the chlorophyll content of tobacco crop under excess water stress compared to control. Silicon supplementation improves the water availability in root surroundings and repairs the root architecture; thus, lead to a better hydraulic conductivity of the root for water and nutrient intake. Furthermore, authors found that the application of silicon fertilizer helped tobacco crop variety H382 improve plant adaptability to deal with excess water stress.
An Assessment of the Interaction between Carbon Dioxide Emissions and Available Nutrients from the Lifecycle of Several Agricultural Crops
Authors: Angon Prodipto Bishnu , Khan Md. Mahbubur Rahman , Tonny Sadia Haque
Published: September 2022

Agricultural products cause the emission of certain significant amount of greenhouse gases. Carbon dioxide (CO2) is one of the most important greenhouse gases and its emissions are increasing day by day as a result of the increase in agricultural productivity. This study aims to pinpoint the most environmentally friendly crops and fruits that are sources of good nutrients and emits less CO2 throughout their life cycles. Relation between nutrient availability and CO2 emissions from staple foods namely; wheat, maize, rice, potato, sugarcane, sugar beet, soybean, palm oil, sunflower, rapeseed, banana, apple and grape are investigated in this study. Secondary data was collected from dataset’s website. Spearman's rank and diagram interpretation technique are used to find out the correlation between nutrient availability and CO2 emissions. Among carbohydrate diets, rice emits 4 kg CO2 kg-1 of crops, which is significantly higher than that of wheat, maize and potato. However, the amount of carbohydrates in rice (0.26%) is less than those carbohydrate diets. Similarly, sugarcane emits more CO2 as 2.6 kg kg-1 of crops than sugar beet (1.4 kg kg-1 of crops) among sugar crops. Soybean and palm oil emit more CO2 as 6 kg kg-1 and 7.2 kg kg-1 of crops, respectively, as compared to other oilseed crops, but every oilseed crop has the same food value. Among fruits, bananas emit less CO2 (1.1 kg kg-1 of crops) and have a higher content of carbohydrates (0.23%) than other selected fruits. Proper crop selection based on nutrient content can lead to lower CO2 emissions than at present and a consistent balance between environmental and nutritional needs in the future.
Synthesis and Characterization of some New 1,3,4-Oxadiazole derivatives based on 4-amino benzoic acid
Authors: Al-Zobaydi Shatha F. , Hamed Bushra K. , Ismael Ban D.
Published: September 2022

Various of 2,5- disubstituted 1,3,4-oxadiazole (Schiff base, ?- lactam and azo) were synthesized from 2,5-di (4,4?-amino-1,3,4-oxadiazole which usequently synth-esized from mixture of 4- amino benzoic acid and hydrazine arch of polyphosphorus acid. The synthesized compounds were cherecterized by using some spectral data (UV, FT-IR , and 1H-NMR)
Classification of Elliptic Cubic Curves Over The Finite Field of Order Nineteen
Authors: Al-Zangana Emad Bakr
Published: September 2022

Plane cubics curves may be classified up to isomorphism or projective equivalence. In this paper, the inequivalent elliptic cubic curves which are non-singular plane cubic curves have been classified projectively over the finite field of order nineteen, and determined if they are complete or incomplete as arcs of degree three. Also, the maximum size of a complete elliptic curve that can be constructed from each incomplete elliptic curve are given.
Perforating Using MPD Techniques: Design and Execution
Authors: Fernandes André Alonso , Ferreira Davi Valle , Schnitzler Eduardo , de Castro Fabiano Hamilton , do Carmo Isadora Luisa de Paiva Goncalves , Santana Pedro Menezes , Roman Roger Savoldi
Published: September 2022

An appraisal well was drilled in Brazilian pre-salt area using overbalance drilling fluid, with conventional techniques. While drilling reservoir (in a 12 1/4" phase), total losses were found. Unsuccessful attempts with LCM and cement pills revealed that only MPD/PMCD techniques could deliver the well to TD. It was decided to anticipate the installation of the 9 5/8" casing, covering only the upper portion of the reservoir, and well was suspended. The remaining reservoir could be drilled later with a rig equipped with MPD system.

This well was designed as a 2-zones intelligent completion in cased hole configuration. Due to the fluid losses a new design had to be considered. Due to reservoir uncertainties, definition on the separation between zones would only be taken after drilling the remaining reservoir section.

To overcome this challenge without adding time and complexity to the overall design, the best solution was to perforate the cased hole section after drilling the remaining section, meaning doing it with reservoir communicated to the wellbore and in PMCD mode.

Several options were evaluated to design the TCP operation in PMCD. Well control strategies, contingencies, thermal effects, and dynamic shocks were considered. The solution consisted in running the TCP with a closed string, without NRVs and having robust contingencies in case of washout or drillpipe failure after perforating.

The well was drilled, and total fluid losses occurred again. It was then successfully perforated still in PMCD, then lower and upper completion were installed. Despite these challenges, this was the fastest intelligent completion in all Petrobras pre-salt fields so far.
First Successful Managed Pressure Cementing Operation for 7" 23ppf Casing Installation in a Narrow Pressure Margin Development Wells, Offshore Miri, Sarawak in Asia Pacific Region
Authors: Awang Rizawati , Koshim Mohd Yazid , Sulong Mohd Syafiq , Che Ku Mazuan Che Ku Afiza Hanim , Chan Hock Wai , Sammat Essam , Sia Kee Ung , Abdul Razak Abdul Hakam
Published: September 2022

In this drilling campaign, out of 6 development wells, MPD/C were utilized in 4 wells. 1 well utilized both MPD for drilling and MPC for 7" casing installation (Well A) and the other 3 wells (Well B, C, D) were drilled conventionally and conducted MPC for 7" casing installation upon confirmed to have a narrow operating drilling window due to the depleted sands which verified by several MPD dynamic leak off tests (DLOT) during drilling resulted satisfied for conducting MPC for 7" 23ppf casing. In both conventional drilling or MPD wells, the job is guided by the drilling window which consist of the pore pressure/collapse pressure serves as the lower limits and fracture pressure serves as the upper bound of the window.

The ability to control the well pressure profile with MPD system led to the Managed Pressure Cementing (MPC) as the alternative method implemented in this narrow pressure margin wells. MPC was planned in detailed by using the advanced MPD hydraulic modeling to model the surge effect of running in hole casing to setting depth and calculate the surface back pressure required to control the annular ECD/ESD during the different stages of cementing operation. Based on the surface back pressure target, the cementing parameters were designed and modelled accordingly to suit the cementing requirements.

This paper presents the engineering design considerations, execution methods and results of four development wells with MPC operations conducted by closing the annular BOP to create the closed loop system to cement 7" 23ppf production casing strings successfully without losses events.
Limbayong Deepwater Development Well Planning – A Collaboration with Geomechanics with MPD Approach
Authors: Atemin Azizul , Sukri Eskandar M , Abd Hakim Hazlan
Published: September 2022

Limbayong field situated in Sabah, Malaysia is operated by PETRONAS Carigali and is the company's first deepwater operated asset owned and operated by PETRONAS. Limbayong is a flagship project and strategically aims to be the deepwater hub for East Malaysia, particularly Sabah. The first phase of development is to start in Q1 2023. One of the campaign objectives is to produce from the deepest reservoir. However, the recently updated geomechanics model shows that there is a need to drill through with an extremely narrow drilling margin window (less than 0.5 ppg) even at the surface section for some of its wells. Most of these deep wells are required to be drilled in highly deviated and in the direction of the minimum horizontal stress. This poses an increased risk of stuck pipe due to hole instability, differential sticking, and skin damage due to high overbalance pressures, which makes drilling these wells challenging and costly.

A mechanical earth model is initially developed based on Limbayong offset. The model has gone through an evolution with the recent model being updated to better fit observation in sand locally and regionally in recent wells drilled. The new reconstruction model significantly reduces the drilling window gap, thus MPD (MANAGED PRESSURE DRILLING) is required to meet the well objective and minimize drilling risk.

By developing and applying those models, it helps to determine the safe operating downhole pressure limits and to effectively assess the drilling risks associated with the planned wellbore orientation. By accurately determining the required bottomhole pressure to prevent wellbore stability problems, managed pressure drilling technology can be implemented to provide improved drilling hazard mitigation by enabling reduced overbalance pressures, constant bottomhole pressure, and faster reaction time by instantaneously adjusting downhole pressures.

This work underscores the development and usage of the advanced multi-phase model to simulate gas influx transport and its effects on BHP (Bottom Hole Pressure) during MPD operations. DrillBench hydraulics modeling was performed to determine the mud weight requirements to be used with the MPD system. Using the lowest MW (Mud Weight) possible to maximize the drilling window and flexibility was implemented as part of scenario simulation.

This paper presents a case study where a holistic approach, combining geomechanics and drilling technologies were employed to address the drilling challenges specific to unconventional and naturally fractured reservoirs. Ultimately, this approach helped to mitigate stuck pipe issues, while proposing an engineering-based methodology to reduce losses by using MPD, hence providing a roadmap to optimized drilling and mitigation of hazards with associated Non-Productive Time (NPT).
Coulomb Counting Estimator of Battery State of Charge Under Variable Discharge Current
Authors: Zine Bachir , BIA Haithem , BENMOUNA Amel , BECHERIF Mohamed
Published: September 2022

Battery state of charge assumes a critical part in advancing electric vehicle energy management, improving battery capacity and energy utilization, keeping batteries from overcharging and over-discharging, for the purpose to guarantee the security and long-term use of batteries lifespan and the expected vehicle autonomy with the indicated battery state of charge. This study presents a battery state of charge estimation using coulomb counting technique with a constant and variable discharging current for Lead-acid battery. In this way, the current, voltage, and temperature are measured during the battery cycle of charge and discharge and contrasted with the estimated value depending on the battery generic model. Additionally, exploratory outcomes are done to approve this investigation.
A New Approach for Attribute Reduction from Decision Table based on Intuitionistic Fuzzy Topology
Authors: Dai Tran Thanh , LONG GIANG NGUYEN , Thi Vu Duc , Ngan Tran Thi , Chau Hoang Thi Minh , Son Le Hoang
Published: September 2022

Most of the current attribute reduction methods use the measure to define the reduct, such as positive region of rough set theory (RST), granular information entropy, and granular distance measures. However, the reducts defined based on the measures are still limited in sizes because of the information conservation property of the reduct compared to the original dataset. Dealing with this matter, this paper proposes a new approach using the intuitionistic fuzzy topology (IFT) to develop an attribute reduction method to find the reduct with the optimal size through topology. Specifically, the IFT base and IFT sub-base structures are proposed based on the pre-order relation. Secondly, we propose a new measure to evaluate the significance of the attribute based on the IFT sub-base. Lastly, we propose a new definition of the reduct based on the IFT base and design two new algorithms based on Heuristic approaches. The theoretical and experimental results show that the proposed method is efficient in size and accuracy of the reduct
Fine-scale spatial variation shape fecal microbiome diversity and composition in black- tailed prairie dogs (Cynomys ludovicianus)
Authors: Neha Sufia A. , Salazar-Bravo Jorge
Published: September 2022

Background
Host associated gut microbiota are important in understanding the coevolution of host-microbe, it’s causes and consequences that may help wildlife population to adapt to its rapid climatic changes. Mammalian gut microbiota composition and diversity may be affected by a variety of factors including geographic variation, seasonal variation in diet, habitat disturbance, environmental conditions, age, and sex. However, there have been few studies that have examined how ecological and environmental factors influence gut microbiota composition in animals' natural environments. In this study, we explore how host habitat, geographical location and environmental factors affect the fecal microbiota of Cynomys ludovicianus at a small spatial scale. We collected fecal samples from five geographically distinct locations in Texas Panhandle occupying habitat classified as urban and rural areas using high throughput 16S rRNA gene amplicon sequencing.
Results
The results showed that microbiota of fecal samples was largely dominated by phylum Bacteroidetes. Fecal microbiome diversity and composition differed significantly across sampling sites and habitats. Prairie dogs inhabiting urban areas showed reduced fecal diversity due to more homogenous environment and anthropogenic disturbance. Urban prairie dog colonies displayed greater phylogenetic variation than those in rural habitats. Differentially abundant analysis revealed that bacterial species pathogenic to humans and animals were highly abundant in urban areas which indicates that host health and fitness might be negatively affected. Random forest model identified Alistipes shahii as the important species driving the changes in fecal microbiome composition. Despite the effects of habitat and geographic location of host, we found a strong correlation with environmental factors- average maximum temperature was the best predictor of prairie dog fecal microbial diversity.
Conclusions
Our findings suggest that reduction in alpha diversity in conjunction with greater dispersion in beta diversity could be indicative of declining host health in urban areas which could help determine in future conservation efforts. Moreover, several bacterial species pathogenic to humans and other animals were highly abundant in prairie dog colonies near urban areas, which may in turn adversely affect host phenotype and fitness.