bluuebunny/crossref_metadata_2025 huggingface dataset:
Successful Tulasnella amonilioides isolation from wild Cattleya intermedia and effectiveness of the mycobiont on in vitro propagation of this threatened Orchidaceae
Authors: Endres Júnior Delio , Alves-Silva Genivaldo , Sasamori Márcio Hisayuki , Silveira Rosa Mara Borges da , Droste Annette
Published: March 2023

This is the first study that report symbiosis in Cattleya, aiming to isolate and identify mycorrhizal fungi capable of promoting germination of this orchid, and to evaluate the development of symbiotically propagated individuals. We compared seed germination percentage, growth index and morphometric variables of seedlings propagated symbiotically in OMA medium with individuals that were non-symbiotically propagated in MS medium. Fungi isolates were identified by phylogenetic analysis and eight of the nine isolates that were efficient in C. intermedia propagation were identified as Tulasnella amonilioides. The mycobiont improved C. intermedia seed germination and plant development when compared with OMA medium without fungi (negative control). Seedlings propagated by symbiotic culture with T. amonilioides produced more leaves and longer roots, while shoot height and number of roots were lower than for seedlings propagated in MS medium with the addition of activated charcoal. Fresh mass of seedlings propagated by symbiotic and asymbiotic techniques were equal, except when seedlings were grown in MS without activated charcoal. Tulasnella amonilioides enhances the in vitro propagation of C. intermedia and provides plants that facilitate symbiotic processes in reintroduction environments.
Estimación de las demandas sísmicas máximas esperadas en marcos de acero con conexiones rígidas
Authors:   , Bautista Ortiz Sandra
Published: March 2023

Las normas NTC-DCEA (2017) y NTC-DS (2017) requieren que las conexiones a momento utilizadas en marcos resistentes a momento (MRA) de ductilidad media y alta sean capaces de proporcionar la ductilidad necesaria. Así, como lo establece el ANSI/AISC 341-16 a raíz de las recomendaciones del SAC Joint Venture (FEMA 355d, 2000), dos medios de demostración son aceptables. Un medio consiste en pruebas específicas del proyecto en las que un número limitado de especímenes a escala completa, que representan las conexiones que se utilizarán en una estructura, se construyen y prueban de acuerdo con un protocolo prescrito en el capítulo K de las disposiciones sísmicas del AISC. Reconociendo que es costoso y consume mucho tiempo realizar tales pruebas, las disposiciones sísmicas del AISC, también establecen la precalificación de las conexiones (ANSI/AISC 358-16) consistentes en un riguroso programa de pruebas, evaluación analítica y revisión por un organismo independiente, el panel de revisión de precalificación de conexiones (CPRP). Las conexiones contenidas en esa norma han cumplido con el criterio para la precalificación cuando se aplica a la estructura que cumpla con las limitaciones contenidas aquí y cuando se diseña y se detalla de acuerdo con esta norma. Debido a que en México es extremadamente limitado el número de pruebas experimentales de conexiones de acero realizadas es pertinente recopilar información experimental de otras fuentes (por ejemplo, FEMA-355d), de tal manera que se apeguen a los parámetros que se usan en los edificios de acero construidos en México, y de esta manera proponer recomendaciones de diseño. El presente trabajo pretende comparar las respuestas máximas de marcos a momento de acero con conexiones rígidas ante diferentes tipos de movimientos del suelo que se han presentado en la ciudad de México, así como evaluar las limitaciones en el diseño de los marcos con diferentes tipos de conexiones rígidas que se encuentran en el Manual del ANSI/AISC 358-16. Así como verificar si con un modelo analítico no lineal de una estructura de acero con conexiones rígidas, modelada en un programa comercial se puede determinar su comportamiento ante cargas dinámicas.
Optimización de un plan de cortante dúctil para su potencial aplicación como disipador de energía
Authors:   , Espinoza Nava Ulises Edmundo
Published: March 2023

Se expone la metodología para incrementar los niveles de eficiencia de un sistema de disipación de energía aumentando el nivel de complejidad del diseño de un disipador histerético. Para ello se seleccionó un sistema de disipación de energía desarrollando un procedimiento de análisis computacional calibrado, se cuantificó el nivel de desempeño estructural actual identificando áreas de oportunidad tecnológica para finalmente rediseñar el sistema de disipación.
Curvas de fragilidad de un puente con múltiples pilas por eje y reforzadas con diferentes encamisados
Authors:   , Cathi Dezha Jovani
Published: March 2023

Se evalúa la vulnerabilidad sísmica de un puente convencional antes y después de ciertas medidas de rehabilitación propuestas. La técnica adoptada para medir la vulnerabilidad son las denominadas curvas de fragilidad. Matemáticamente, las curvas de fragilidad indican la probabilidad de que la respuesta de una estructura en particular exceda algún estado límite en función de algún parámetro que defina la intensidad sísmica. Las curvas de fragilidad son de gran utilidad para los ingenieros diseñadores e investigadores, ya que son un apoyo esencial en diversos estudios, como en: evaluaciones de riesgo sísmico de los sistemas estructurales, identificación de diseños óptimos y estrategias de rehabilitación, determinación de la probabilidad de los márgenes de seguridad de las estructuras para diferentes movimientos sísmicos, toma de decisiones y elaboración de normativas utilizadas por las distintas entidades responsables de la seguridad de los sistemas estructurales y de los usuarios. Finalmente, partiendo de los modelos con daño, se diseñan y modelan las columnas con las técnicas de rehabilitación que se pretenden evaluar durante este trabajo, las cuales son: encamisados de concreto, encamisados de acero y encamisados con fibra de carbono. Se obtendrán por tercera vez las curvas de fragilidad con las nuevas condiciones de las pilas rehabilitadas. Este procedimiento descrito a groso modo tendrá como objetivo particular definir la efectividad de las técnicas de refuerzo mediante el análisis de la variación de las curvas de fragilidad obtenidas. En todos los procesos descritos, se considerará la variabilidad de las propiedades mecánicas de los materiales que componen al puente mediante simulaciones por el Método de Monte Carlo.
Estudio comparativo de sistemas estructurales de acero con y sin diagonales
Authors:   , Monzón Monzón Juan Carlos
Published: March 2023

Esta investigación tratará de demostrar la eficiencia estructural, sustentable y resiliente; de los edificios con rejillas perimetrales Diagrid, mediante la comparación con los sistemas estructurales tradicionales, usados en la actualidad. En este caso de estudio, se comparará con sistemas estructurales Marco Momentos Resistentes y Marco con Contravientos Concéntricos. La comparación se realizará a partir de análisis estructurales lineales y no lineales.
Análisis y diseño del sistema estructural dual de marcos con muros compuestos del tipo doble placa de acero rellenos de concreto
Authors:   , Bohorquez Cruz Wilfrido
Published: March 2023

The Composite Plate Shear Wall / Concrete Filled structural system (C-PSW/CF) is studied within this research. Linear and nonlinear analysis of composite wall prototypes are performed through simplified approaches and the finite element method (FEM). In addition, a parametric analysis is performed with the aim to evaluate some specific parameters and get analysis recommendations. Finally, a nonlinear model is validated, which reproduce the hysteretic response of experimental tests.
cenas de reconhecimento no romance Dáfnis e Cloé
Authors: Silva Luiz Carlos André Mangia
Published: March 2023

Cenas de reconhecimento estão presentes na épica, no drama (tragédia e comédia) e, como não podia deixar de ser, no romance antigo, que “devorou” o recurso e fez largo uso dele: temos cenas de reconhecimento nos cinco romances idealizados que nos chegaram (os chamados Big Five). Neste artigo, analisamos as duas cenas de reconhecimento em Dáfnis e Cloé, tomando por base os apontamentos da Poética de Aristóteles e demonstrando como os reconhecimentos se articulam a diferentes elementos narrativos. Por isso, focalizamos também os usos da peripécia, do páthos e da hamartía, que na obra trabalham em relação aos reconhecimentos e conferem complexidade à questão das identidades dos protagonistas dentro desta narrativa.
Eros e Himeros
Authors: Duarte Adriane da Silva
Published: March 2023

A temática amorosa ocupa importante lugar na delimitação do gênero romance na Antiguidade, uma vez que os seus mais antigos exemplares trazem em seu centro a idealização da relação amorosa. Outro conjunto de obras que compõem o corpus do romance antigo, os romances cômico realistas, dão tratamento diverso ao impulso erótico, muitas vezes deslocado para um plano secundário da narrativa e abordado de forma não idealizada. Através da análise da representação de eros em dois romances, Efesíacas, de Xenofonte de Éfeso, da vertente amorosa, e Lúcio ou o asno, de (Pseudo-)Luciano, da cômico realista, vou buscar estabelecer formas distintivas de tratar a matéria amorosa nesse gênero.
Afrodite em prosa e verso
Authors: Ragusa Giuliana
Published: March 2023

Centra-se este artigo nos inescapáveis ecos do imaginário erótico arcaico que ouvimos no romance Quéreas e Calírroe, de Cáriton de Afrodísias (século I d.C.?), e no modo como nele se desenham a deusa Afrodite e o próprio desejo. Pretende sublinhar como o olhar para a poesia grega em que se elabora aquele imaginário tradicional é um referente enriquecedor para a leitura da prosa tardia de Cáriton, tanto pelas similitudes quanto pelas diferenças que, particularmente estas, expressam uma concepção distinta de érōs.
Apresentação: Dossiê Eros e Afrodite no Romance Antigo
Authors: Duarte Adriane da Silva
Published: March 2023

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concept of productive ambiguity with some examples from Iliad 2
Authors: Abritta Alejandro
Published: March 2023

The goal of this paper is to introduce and elucidate the concept of “productive ambiguity” for the study of Homeric poetry and other literary texts. After the introduction, I present a theoretical elucidation of the concept, starting from a general notion of ambiguity and identifying three features of productive ambiguity: its irresolvable character (no alternative can be ruled out on textual or linguistic grounds), its persistence (both alternatives are appropriate to the context and contribute to the interpretation of the text), and its productivity (the ambiguity itself contributes to the interpretation of the text). In the third section, I analyze four passages from Iliad 2: 2.73, 285, 340-9, and 807, studying in each the source of the ambiguity and demonstrating that it fulfills the three features to be considered productive.
How does Workplace Ostracism Affect Employee Performance? Mediating Role of Psychological Resilience, Moderated Mediation Role of Cyberloafing
Authors: BAŞ Murat , ŞİRİN M.Sabri
Published: March 2023

Background and Purpose: Workplace ostracism is the situation in which the employee is rejected and ignored by the employees in the same workplace. Since this is a situation that prevents the success of the employees, it affects the performance of the employee. In this respect we assume that it is an important mediator in terms of experiencing psychological resilience in this relationship. In our research model, we also suggested that cyberloafing will affect the severity of the relationship between workplace ostracism and resilience. Therefore, we suggested that psychological resilience would have a mediator role and cyberloafing would have a moderating role in the relationship between workplace ostracism and employee performance, based on the opinions of employees.

Design/Methodology/Approach: Data were obtained from 482 employees of Erzincan Municipality by utilizing the survey method. The obtained data were analyzed by using structural equation modeling to test our hypotheses.

Results: It was found that there is a significant and positive correlation between workplace ostracism and psychological resilience, a significant and positive correlation between psychological resilience and employee performance, and a significant and negative correlation between workplace ostracism and employee performance. In addition, it was determined that workplace ostracism has an indirect effect on employee performance through psychological resilience, and cyberloafing has a moderating role in this indirect relationship.

Conclusion: Our results showed the importance of the mediator role of psychological resilience and the moderator role of cyberloafing in the relationship between perceived workplace ostracism and employee performance.
EMPIRICAL RESEARCH ON CUSTOMER'S PERCEPTION REGARDING THE SERVICE QUALITY OF AIR TRANSPORT COMPANIES - ROMANIA 'S EXAMPLE
Authors:   Bucharest University of Economic Studies, Romania, RIZOIU Leonard Alin , STATIE Alin Dumitru ,   Bucharest University of Economic Studies, Romania, IONITA Andreea ,   Bucharest University of Economic Studies, Romania, POPESCU Dan ,   Bucharest University of Economic Studies, Romania
Published: March 2023

Our paper aims to analyze the customers' perception regarding the image of TAROM, but also the way in which they perceive the external organizational communication. The final objective is to determine how organizational communication can be improved, but also how customers are treated, so that the image of the company can be improved on the market. The methodology of empirical research on organizational communication in passenger air transport was exploratory quantitative research carried out in March 2022. We used the quantitative research method, this from the desire to illustrate, as eloquently as possible, by means of concrete data, how the image of the company suffers due to the fact that the staff does not pay attention to the way of communicating with the clients. As a working tool for quantitative research, we turned to a questionnaire placed in the crowdsourcing system on the link http://www.isondaje.ro/sondaj/856559491. 829 respondents answered the questionnaire questions, these being persons who use air transport services. Using the econometric instrumentation provided by the IBM SPSS application, the called research procedure consisted in the quantitative analysis of the data by means of descriptive statistics methods, the analysis of multiple answers and the qualitative analysis of the answers recorded. Finally, we validated the assumptions of our study.
THEORIES OF CORPORATE GOVERNANCE APPLIED TO STATE-OWNED ENTERPRISES
Authors:   Faculty of Economics and Business Administration, Babeș-Bolyai University, Romania, CIOLOMIC Ioana Andreea , BELEIU Ioana Natalia ,   Faculty of Economics and Business Administration, Babeș-Bolyai University, Romania, NISTOR Răzvan Liviu ,   Faculty of Economics and Business Administration, Babeș-Bolyai University, Romania
Published: March 2023

The theories on corporate governance influence both the private and the public sector but need to be adapted to the context of implementation. The aim of the paper is to identify and present the main theories that influence the governance of state-owned enterprises (SOEs), providing the theoretical framework for future studies that analyze the application of corporate governance theories in the case of the mentioned organizations. The theories discussed in the current paper are the agency theory, the stakeholder theory, the resource dependency theory, and the institutional theory. The article focuses on SOEs since they have an important role in the economy, but the research on this topic is still scarce.
TOOLS FOR THE ADEQUATE APPLICATION OF THE ENVIRONMENTAL LEGISLATION FOR THE WASTE MANAGEMENT
Authors:   Transilvania University of Brasov, Romania, SALCĂ ROTARU Cristina Mihaela , FINGER David Christian ,   Reykjavik University, Iceland, DRAGHICI Camelia ,   Transilvania University of Brasov, Romania
Published: March 2023

The growing number of normative acts regarding waste management determines the difficulty of the process of internalization and compliance with environmental obligations. From this point of view, those involved in waste management, no matter they are legal persons or individuals, especially in rural area, might have a passive failure to comply with the legislation. Starting from the inventory of the normative acts regarding waste management, a minimum of them was identified, needed to be known and applied. Therefore, it is necessary to develop new tools for easier and adequate understanding of the legislation, especially of the waste management obligations. Four schemes were developed aiming the obligations systematization: two schemes for local administration, one legal person and one for individuals. These four schemes are included in one of the six teaching modules (TM4 – Waste Management in Rural Communities) developed in the frame of the Environmental Education – OERs for Rural Citizens (EnvEdu - OERs) project, and will be available on the project learning platform.
DETERMINING WHAT PARTNER SELECTION FACTORS MATTER FOR THE DIFFERENT ALLIANCE OR NETWORK PERFORMANCES
Authors:   Babeș-Bolyai University, Romania, LEHENE Cosmin Florin
Published: March 2023

In this paper we investigate the relationship between various partner selection factors and the alliance performances. Through the mean of a statistical analysis of the answers provided by 46 best performers medium and large companies operating in Romania we found that both categories of partner selection factors (noncompany and company related) were associated with the superior alliance performances. We observed a slightly stronger effect for the company related factors on the alliance performances. Specifically, we found that the consideration of country and regional issues was associated only with revenues growth and new product development due to organization’s portfolio of strategic alliances. Instead, the companies and organizations considering industry issues reported superior results for all six measures of alliance performances (revenues growth, competitive position, customer satisfaction, operations improvement, product improvement, new product development). Moreover, the consideration of partner attributes was also associated with all measures of alliance performances with one exception: customer satisfaction. The strongest effect on alliance performances however, had the importance devoted by companies and organizations to the partner selection process. It means, more resources and attention devoted to the partner selection process better the alliance performances reported. Three regression models from six (for the macroeconomic/noncompany factors) and five regression models from six (for the company related factors) significantly explained the differences between the companies depending on their alliance performances. The paper contributes to the research conducted in the alliances’ literature regarding the alliance partner selection for the design and the development of strategic alliances or strategic networks/clusters.
MAPPING THE KNOWLEDGE AREA RESEARCH IN JOB PERFORMANCE DETERMINANTS
Authors:   Bucharest University of Economic Studies, Romania, BOGHIAN Ruxandra , DIMA Adriana ,   Bucharest University of Economic Studies, Romania, RADU Cătălina ,   Bucharest University of Economic Studies, Romania, CIOC Mihai ,   Bucharest University of Economic Studies, Romania
Published: March 2023

This study conducts a complete review of scientific production using the quantitative approach of bibliometric analysis to help us comprehend the existing structure of studies and to indicate future research directions on job performance determinants and job satisfaction. By restricting its study subjects and recognizing specific trends, the article maps the literature. Descriptive and performance studies were carried out on a sample of 2028 papers using the Web of Science database (WoS). The scientific mapping of the conceptual, intellectual, and social structure was performed using the VOSviewer program, which offers academics with a quantifiable and graphic depiction of the job performance determinants and job satisfaction sector. The results indicated that the field's most notable researchers are of American origin, and the most active nations in the subject of job performance determinants and job satisfaction are China, England, Germany, Canada and the Netherlands, with important partnerships worldwide.
A LITERATURE REVIEW ON ORGANIZATIONAL MEMORY FROM 1991 TO 2021
Authors:   Bucharest University of Economic Studies, Romania, FLORESCU Mircea , ISPAS Rodica-Livia ,   Bucharest University of Economic Studies, Romania
Published: March 2023

Organizational memory has been found among the organization’s characteristics outlined through organizational learning and knowledge management literature in the last three decades. The purpose of this paper is to reveal the nature, the place, and the role of the organizational memory from an examination of the literature starting with the year 1991, when Walsh and Ungson published, in a reference work for researchers, the first major contribution to the development of the concept. Our analysis has found 213 papers that from their title appeared to be dedicated to the study of the organizational memory, revealing three approaches towards the definition of the memory: based on the content, the structure, or hybrid (content and structure).
ECONOMIC ASPECTS OF CYBERSECURITY
Authors:   Brno University of Technology, Faculty of Business and Management, Czech Republic, VÁCLAVÍK Lukáš
Published: March 2023

The ever-increasing trend of the involvement of various computing tools in the reality of organisations of all sizes brings with it the need to evaluate their security, even in the context of the activities of the entity. Virtually all organisations try to eliminate the cyber risks that arise from the use of various ICT tools by using various security tools. The implementation of these techniques entails costs that need to be justified and evaluated from the perspectives of different stakeholder groups. This text will present selected indicators assessing cybersecurity in terms of he resources invested. In addition to these metrics, selected models evaluating security investments with respect to, among other things, the existence of vulnerabilities and threats will also be presented. As this is a complex discipline, the text concludes by recommending a comprehensive approach to addressing security assurance, taking into account the requirements of the organisation, the value of its assets, the level of vulnerability or the requirements of its stakeholders
COMPETITIVENESS OF FOREIGN TRADE IN CEREALS AT COUNTY LEVEL (NUTS 3) IN ROMANIA
Authors:   Bucharest University of Economic Studies, Romania, PETRE Ionut Laurentiu , DOBROTĂ Carmen-Elena ,   Bucharest University of Economic Studies, Romania, GIUCĂ Andreea Daniela ,   Bucharest University of Economic Studies, Romania
Published: March 2023

In this paper we wanted to determine the export and cereal value potential for Romania at the level of the 41 counties together with the Municipality of Bucharest. For this purpose, data from national databases, namely the National Institute of Statistics, were used for the cereals product group, analysing exports and imports, and also calculating the trade balance. These data will be plotted both graphically and to determine the trade balance values, i.e. to determine the surplus or deficit for each county. In the end, both counties with surpluses will be determined, but especially potential counties with grain trade deficits, given certain agriculturally unproductive areas.
Participación de la mujer en la cadena de valor de maíz- tortilla en dos municipios del estado de Oaxaca
Authors: Sánchez-Soriano Marbella , Cruz-Cabrera Blasa Celerina , Castillo-Leal Maricela , Acevedo-Martínez Jorge Antonio
Published: March 2023

Objetivo: determinar la participación de las productoras e identificar sus desafíos y oportunidades en la cadena de valor del totopo en Santa María Xadani y clayuda en San Antonio de la Cal, Oaxaca, bajo el enfoque de género. Metodología: se utilizó un método mixto. Se aplicó un cuestionario a 136 productoras con la técnica cara a cara y la observación participante. Los datos se analizaron con el análisis de conglomerados jerárquicos, K-medias y el cálculo de costos, ingresos y ganancias. Resultados: los hallazgos revelan oportunidades como apoyos gubernamentales y adición de valor. Los desafíos de provisión, mercado, socioculturales, de acceso a información y financiamiento influyen en las ganancias de los segmentos y estancan sus actividades a negocios de subsistencia. Limitaciones: restricciones en el trabajo de campo por la pandemia de Covid-19. Se configuraron las preguntas a la lengua zapoteca. Conclusiones: se limita el emprendimiento y se desplaza a las mujeres de los eslabones más rentables en la cadena de valor del totopo y clayuda. La participación de las mujeres en los sistemas agroalimentarios contribuye al desarrollo rural, la inclusión, la equidad y la sostenibilidad.
Conquering APA Style for the Seventh Edition: Advice From APA Style Experts
Authors: Hughes Jennifer L. , Cannon Bradley , Camden Abigail A. , Treadwell Kimberli R. H. , Thomas Joel G. , Perdue Bonnie M.
Published: March 2023

In this updated article, APA Style experts give advice about conquering APA Style based on the seventh edition of the Publication Manual of the American Psychological Association (APA, 2020; cf. Hughes et al., 2017). Learning and teaching APA Style can be difficult because of the many rules (Hughes et al., 2017), and the seventh edition added additional rules and changed existing rules that writers are expected to follow. This article is meant to be a resource for those teaching and learning APA Style. The first part of the article covers these new rules. The second part details common writing issues that APA Style tutors often see. The third part gives writing tips and tricks to help in a research methods course. The next part contains APA Style rules that many writers do not know, and the final part has style rules often missing from empirical research submissions to academic journals.
Functional Properties of Salted Duck Egg Powder with Maltodextrin and Tricalcium Phosphate Incorporation as Anticaking Agents
Authors: Mahmudah Nur Aini , Widigdyo Anang , Kurniawan David , Mardiana Nur Agustin , Putra Aditya Wirawantoro , Wahyu Utama Adiguna Sasama , Kurniawan Hindra , Purnomo Panji , Sari Fitri Komala
Published: March 2023

The protein content in egg contributes effectively to the fulfilment of nutrients in daily life at an affordable price and acceptable organoleptic properties. This study aimed to investigate the effect of anti-caking agent addition (maltodextrin and tricalcium phosphate) on the quality and functional properties of salted duck egg powder. Addition of 2% maltodextrin increased the moisture content in salted duck egg powders as much 36% compared to the control. 2% TCP incorporation decreased the moisture content up to 54%, could not maintain the emulsion stability, but it increased the emulsion activity. There were no significant differences (p < 0.05) on the parameter of foaming capacity and foaming stability. Anticaking agent maltodextrin and TCP did not affect the water holding capacity of all four salted duck eggs powder. However, maltodextrin addition slightly increased the oil holding capacity. Due to the functional properties of emulsification, foaming, water and oil binding, salted duck egg powders are potentially utilized for the complementary of a large number of food products with its characteristics of longer shelf life and specific flavor.
“The Best VR in the Whole Flaming Navy”: The Life and Career of Lieutenant Commander Clifton R. “Tony” Coughlin
Authors: Niddam-Dent David
Published: March 2023

Lieutenant Commander Clifton R. “Tony” Coughlin, DSC, was one of the most successful Royal Canadian Naval Volunteer Reserve (RCNVR) officers of the Second World War. This article examines his life and career, drawing primarily on the 800 letters he wrote to his wife Martha Coughlin from war’s outbreak until his death in 1944. It provides insight into many of the key characters of the wartime Royal Canadian Navy, the day-to-day experience of RCNVR officers, and the character of a brilliant, and largely forgotten, leader. Coughlin was candid and observant. By the time of his death, he was well on his way to becoming, as he always hoped, “the best VR in the whole flaming navy.”

Le capitaine de corvette Clifton R. « Tony » Coughlin, D.S.C., était l’un des meilleurs officiers de la Réserve des volontaires de la Marine royale canadienne (RVMRC) de la Seconde Guerre mondiale. Cet article, qui traite de sa vie et de sa carrière, s’appuie principalement sur les 800 lettres qu’il a écrites à sa femme Martha Coughlin depuis le déclenchement de la guerre jusqu’à sa mort en 1944. Il donne un aperçu de bon nombre des personnages clés de la Marine royale canadienne en temps de guerre, des expériences quotidiennes des officiers de la RVMRC et du caractère d’un chef exceptionnel en grande partie oublié. Coughlin était franc et bon observateur. Au moment de sa mort, il était sur le point de devenir, comme il l’avait toujours espéré, « le meilleur réserviste volontaire de la marine entière ».
El movimiento indígena, el MAS y la descolonización educativa en Bolivia
Authors: Latorre Chavez Rhonny Felipe
Published: March 2023

Los albores del siglo XXI en Latinoamérica, trajeron consigo la intención de transformar las relaciones interétnicas en el marco de la creación de un nuevo tipo de Estado denominado Plurinacional, el cual se caracterizaría por establecer un nuevo modo de integración basada en la heterogeneidad cultural que habitan en los territorios nacionales, fijándose como meta la descolonización. En este horizonte la educación juega un papel central. Este trabajo, a través de una revisión de fuentes secundarias, se enfoca en analizar tres elementos de este proceso: (1) la trayectoria de los movimientos indígenas a lo largo del Siglo XX y la instalación de un ideario educacional descolonizador, (2) Las elaboraciones conceptuales decoloniales y sus vínculos con la mirada culturalista y (3) las principales críticas y tensiones que ha suscitado la implementación del Estado Plurinacional en Bolivia, y su reforma educativa. Se afirma que el gobierno del MAS recoge elementos de una discursividad indígena anticolonial, pero que, pese a significar una alternativa a las formas de asimilación desarrollista y neoliberal, reproduce una aproximación esencialista al sujeto indígena, centrándose en el reconocimiento de la diferencia cultural, y dejando de lado otros elementos significativos en el horizonte político planteado por los movimientos durante el siglo pasado.
¿Se asocia la calidad de las tesinas a la selectividad?:
Authors: Espinoza Oscar , González Fiegehen Luis , Sandoval Luis , Loyola Javier
Published: March 2023

La selectividad de las universidades otorga información relevante para ponderar su calidad. Se esperaría que la mayor o menor calidad del proceso formativo abarque todos los aspectos académicos, incluyendo las tesinas desarrolladas por estudiantes que cursan carreras de pregrado. La investigación que se reporta en este artículo tuvo por objetivo evaluar la calidad de las tesinas en carreras de Psicología en tres universidades chilenas con distintos niveles de selectividad. El estudio apela al juicio de expertos para evaluar la calidad de las tesinas. Los resultados revelan que el nivel de selectividad está asociado parcialmente a la mayor calidad de las tesinas y, por ende, al proceso formativo en el caso de las carreras de Psicología. No existe evidencia suficiente que confirme completamente el supuesto central de este estudio, vale decir, que mayores niveles de selectividad y años de acreditación institucional se corresponden con tesinas de mayor calidad, y viceversa.
Reflexiones para una educación emancipadora desde nuestro sur: el aporte del kimeltuwün
Authors: Alvarez Osses Ingrid Adriana
Published: March 2023

El presente artículo tiene por objetivo problematizar el discurso y los aportes de intelectuales mapuche ante la política pública intercultural y el multiculturalismo neoliberal. Siguiendo los procedimientos metodológicos de la hermenéutica crítica propuesta por Ricoeur, que exige relacionar los acontecimientos con el texto que los contiene, y a este con su contexto, el artículo comienza asumiendo que en América Latina el colonialismo y la modernidad estructuran un orden racial multidimensional: epistemológico, social, político, económico, etc. En este contexto, la filosofía latinoamericana afirma la existencia de un sujeto que ha tenido la capacidad de negar esa dominación para irrumpir en la historia. Se argumenta que este sujeto, desde esa racialidad y con sentido creador a partir de su cultura y política, posibilita la crítica y la resistencia ante los desafíos de raza y clase impuestos en América Latina por la distinción entre civilización y barbarie propia del colonialismo capitalista. A partir de este planteamiento se analiza el debate entre intelectuales mapuche en torno al carácter formativo del kimeltuwün reflexionando sobre su relación con los acontecimientos del sistema escolar chileno. Se concluye que las vivencias experimentadas en ambos tipos de educación posibilitan la constitución de subjetividades y de prácticas políticas con gran potencial emancipatorio y en antagonismo al eurocentrismo, el capital y la racialización en territorio mapuche.
Diseño, implementación y evaluación del Programa de educación emocional “Universo Emocionante” a través de la metodología del Aprendizaje Servicio
Authors: Cabello-Sanz Sandra , Muñoz-Parreño Julián Alfonso
Published: March 2023

Antecedentes: el desarrollo de programas de educación emocional (EE) permite reducir la conflictividad y la violencia entre los adolescentes, mejorando su motivación, competencias sociales y emocionales, el clima escolar y la convivencia (Bisquerra-Alzina & López-Cassà, 2021; Garaigordobil-Landazabal, 2018). Objetivo: implementar un programa basado en una metodología híbrida entre el modelo pentagonal de competencias emocionales del Grupo de Investigación en Orientación Psicopedagógica (GROP) y la metodología del Aprendizaje Servicio (ApS), que permita la mejora de las competencias emocionales en Educación Secundaria Obligatoria (ESO). Método: se utilizó un diseño cuasiexperimental pretest/postest de dos grupos que conformaron una muestra total de 30 estudiantes de 2º de la ESO (15 alumnos como grupo experimental y 15 como grupo control) (Medad = 13.74; DT = .54). Se empleó el Cuestionario de Desarrollo Emocional para Adolescentes (CDE-SEC). Resultados: el grupo experimental mejoró significativamente en cuatro de las seis competencias emocionales estudiadas: conciencia emocional, regulación emocional, competencia social, y competencia emocional total, excepto la autonomía emocional sin diferencias entre los grupos. Respecto al grupo control se encontraron resultados significativos en competencia para la vida y el bienestar. Conclusiones: el Programa es efectivo para mejorar el nivel de competencia emocional del alumnado de ESO.
Uni-Mol: A Universal 3D Molecular Representation Learning Framework
Authors: Zhou Gengmo , Gao Zhifeng , Ding Qiankun , Zheng Hang , Xu Hongteng , Wei Zhewei , Zhang Linfeng , Ke Guolin
Published: March 2023

Molecular representation learning (MRL) has gained tremendous attention due to its critical role in learning from limited supervised data for applications like drug design. In most MRL methods, molecules are treated as 1D sequential tokens or 2D topology graphs, limiting their ability to incorporate 3D information for downstream tasks and, in particular, making it almost impossible for 3D geometry prediction/generation. In this paper, we propose a universal 3D MRL framework, called Uni-Mol, that significantly enlarges the representation ability and application scope of MRL schemes. Uni-Mol contains two pretrained models with the same SE(3) Transformer architecture: a molecular model pretrained by 209M molecular conformations; a pocket model pretrained by 3M candidate protein pocket data. Besides, Uni-Mol contains several finetuning strategies to apply the pretrained models to various downstream tasks. By properly incorporating 3D information, Uni-Mol outperforms SOTA in 14/15 molecular property prediction tasks. Moreover, Uni-Mol achieves superior performance in 3D spatial tasks, including protein-ligand binding pose prediction, molecular conformation generation, etc. The code, model, and data are made publicly available at https://github.com/dptech-corp/Uni-Mol.
Molecular basis of the substrate specificity of the Pd-PTE phosphotriesterase: a combined QM/MM MD and electron density study
Authors: Mulashkina Tatiana , Kulakova Anna , Nemukhin Alexander , Khrenova Maria
Published: March 2023

The increase of organophosphorus compounds, pesticides and flame-retardants, in wastes is an emerging ecological problem. Bacterial phosphotriesterases are capable for hydrolysis of some of them. We utilize modern molecular modeling tools to study hydrolysis mechanism of organophosphorus compounds with different leaving groups by phosphotriesterase from Pseudomonas diminuta (Pd-PTE). We compute Gibbs energy profiles for enzymes with different cations in the active site: native Zn2+ cations; Co2+ cations that increase the steady-state rate constant. A high-spin state of the cobalt-containing active site catalyzes hydrolysis. Reaction happens with two elementary steps via formation of the pentacoordinated intermediate. For substrates with good leaving groups the reaction proceeds with low energy barriers with both Zn2+ and Co2+ cations in the active site, thus the product release is likely to be a limiting step. For substrates with poor leaving groups, reaction products are destabilized relative to the ES complex that suppresses the reaction. Electron density and geometry analysis of the QM/MM MD trajectories of the intermediate states with all considered compounds allow us to discriminate substrates by their ability to be hydrolyzed by the Pd-PTE. These criteria is can be utilized to predict whether novel organophosphorus compounds can be hydrolyzed by the Pd-PTE.
The Chemical Bond in H2: An Orbital Exchange Calculation
Authors: Merrithew Paul
Published: March 2023

This paper extends the orbital exchange method calculation of H2 to include the possibility of a [HH, H+H-] resonance. The impact of the resonance on the orbitals overlaps and on the kinetic energy is described. The bond energy for H2 is found by varying the parameters associated with the compression (orbital reduction) and polarization of the 1s bonding orbitals of H and H-, and the extent of resonance, to obtain the maximum bond energy with the bonding overlap less than or equal to 1.0. The solution finds a binding energy, De, of 4.725 e.v. at a bond length of 0.737 with resonance fraction of 0.3628. This is to be compared with the accepted value for De of 4.75 e.v. at 0.741. The success of this calculation strongly supports the hypothesis that overlapping bonding orbitals are not completely distinguishable and the efficacy of the orbital exchange method.
A saddle-shaped expanded porphyrinoid fitting C60
Authors: Maulbetsch Theo , Frech Philipp , Scheele Marcus , Törnroos Karl W. , Kunz Doris
Published: March 2023

We present the synthesis of a new type of an expanded porphyrinoid macrocycle with a saddle-shaped morphology and its complexation of C60 guest molecules. The new macrocycle contains four carbazole and four triazole moieties and can be readily synthesized via a copper-catalyzed click reaction. It shows specific photo-physical properties including fluorescence with a high quantum yield of 60 %. The combination of the saddle-shaped geometry with the expanded -system allows for host-guest interactions with C60 in a stacked polymer fashion. Evidence for the presence of a host-guest complex is provided both in solution by NMR spectroscopy and in the solid state by X-ray structure analysis.
Disrupting Protein Expression with Double-Clicked sgRNA-Cas9 Complexes: A Modular Approach to CRISPR Gene Editing
Authors: Tijaro Bulla Santiago , Osman Eiman A. , St Laurent Chris D. , Macauley Matthew S. , Gibbs Julianne M.
Published: March 2023

CRISPR-Cas9 is currently the most versatile technique to perform gene editing in living organisms. In this approach, the Cas9 endonuclease is guided towards its DNA target sequence by the guide RNA (gRNA). Chemical synthesis of a functional 97-nucleotide single gRNA (sgRNA) is non-trivial because of the length of the RNA strand. Recently, we demonstrated that a sgRNA can be stitched together from three smaller fragments through a copper-catalyzed azide-alkyne cycloaddition, making the process highly modular. Here, we further advance this approach by leveraging this modulator platform by incorporating chemically modified nucleotides at both ends of the modular sgRNA to increase resistance against RNases. Modified nucleotides consisted of a 2O-Me group and a phosphorothioate backbone in varying number at both the 5 and 3 ends of the sgRNA. It was observed that three modified nucleotides at both ends of the sgRNA significantly increased the success of Cas9 in knocking-out a gene of interest. Using these chemically stabilized sgRNAs facilitates multigene editing at the protein level, as demonstrated by successful knock-out of both Siglec-3 and Siglec-7, using two fluorophores in conjunction with fluorescence activated cell sorting. These results demonstrate the versatility of this modular platform for assembling sgRNAs from small, chemically modified strands to simultaneously disrupting gene expression of two proteins.
Conjugation And Evaluation of Novel Polymeric Naproxen-PEG Esters
Authors: Schlecht Syon , Fleming Haley , Curtis Christina
Published: March 2023

Nonsteroidal anti-inflammatory drugs (NSAID) are commonly used and prescribed across the globe. A defining characteristic of NSAIDs is their poor water solubility; therefore, in a practical setting this translates directly to poor systemic absorption in the body1. The ability of a drug to effectively enter and carry out microscopic processes within cells depends on its ability to transverse the lipid membrane surrounding cells. The metric used to evaluate this capacity is called the partition coefficient, or the logP. The logP is the logarithm of concentration of a molecule between octanol and water partitions, where membrane permeability can be evaluated from this value as octanol is comparable to the cell membrane2. A logP above >0 indicates a preferential solubility in lipids, a high logP is correlated with poor solubility and absorption3.It is recommended that a drug must be overall lipophilic but still maintain aqueous solubility4. Naproxen is an NSAID that is used to treat inflammation found in many common illnesses. Naproxen has a logP value of 3.3; however a logP value <2.7 is best for traversing barriers in the body such as the blood brain barrier4. By adapting a novel synthesis method to perform the esterification of naproxen to polyethylene glycol, the aqueous solubility can be improved. Thin-layer chromatography studies confirmed an decrease in the logP value. Spectrophotography drug release and solubility tests of the conjugate form reveal a prolonged release time. This indicates the successful development and distribution of the novel molecule. The lower logP value also corresponds to better oral absorption and uptake, therefore, naproxen-PEG ester demonstrates capacity as a drug delivery system with increased therapeutic efficacy.
O olhar dos professores da rede municipal de Marília sobre o SAREM e outras dimensões da qualidade social
Authors: Sabia Claudia Pereira de Pádua
Published: March 2023

O Sistema de Avaliação do Rendimento Escolar de Marília foi criado em 2004. O objetivo do estudo é identificar o que os professores do Ensino Fundamental deste município pensam sobre o SAREM, verificar se existe outra proposta de avaliação e os possíveis usos dos seus resultados. A pesquisa foi desenvolvida em uma abordagem qualitativa e a metodologia utilizou as pesquisas bibliográfica, documental e o formulário Google docs. Como resultados apresentamos que embora os resultados do SAREM sejam considerados pela maioria como um indicador de qualidade, 29,6% dos professores consideram que não pode ser o único indicador de todo o trabalho realizado e são desenvolvidas outras atividades de qualidade que não são consideradas. Foi verificado como forma de avaliação complementar a avaliação institucional. Em relação aos usos dos resultados desta avaliação, a maioria afirma que os resultados são utilizados para o planejamento pedagógico e para a formação continuada.
Meningkatkan Keaktifan dan Hasil Belajar Siswa Melalui Penerapan Model Pembelajaran Berbasis Teks pada Mata Pelajaran Bahasa Inggris Kelas VII SMPN 2 Gending Kabupaten Probolinggo Semester Gasal Tahun Pelajaran 2019/2020
Authors: Heriyanto Mahfudz
Published: March 2023

Penelitian yang sudah selesai dilaksanakan ini bertujuan untuk meningkatkan keaktifan siswa dna jika hasil belajar siswa dengan diterpkannya model pembelajaran berbasis teks pada mata pelajaran Bahasa Inggris. Penelitian ini dilakukan pada siswa kelas VII SMPN 2 Gending Kabupaten Probolinggo Semester Gasal Tahun pelajaran 2019/2020. Penelitian menggunakan penelitian tindakan kelas dengan 2 siklus. Penelitian ini menunjukkan bahwa hasil belajar siswa mengalami peningkatan setelah dilakukan tindakan. Persentase siswa yang belum tuntas terus mengalami penurunan dari siklus 1 ke siklus 2 (dari 26,47% menjadi 8,82%). Persentase siswa yang sudah tuntas mengalami kenaikan dari siklus 1 ke siklus 2 (dari 73,53% menjadi 91,18%). Indikator keberhasilan PTK ini adalah, bahwa PTK ini dikatakan berhasil jika persentase siswa yang dinilai hasil belajarnya tuntas mencapai minimal 85%. Persentase siswa yang nilainya tuntas sudah mencapai 91,18%, maka PTK ini sudah berhasil.
STRENGTH CHARACTERISTICS OF CONCRETE MADE WITH RECYCLED CONCRETE AGGREGATE (RCA), MICRO-SILICA AND POLYPROPYLENE FIBRE
Authors: ADETUKASI ADESOLA OLAYINKA , OLOWOFOYEKU ADEOYE MOSES , ALAKA HAFIZ A. , ADEBAYO OMOWUMI
Published: March 2023

Recycled concrete aggregate has been widely researched to be capable of replacing natural coarse aggregate in concrete, however, with some inadequacies in its concrete’s ability to attain the same feat in mechanical properties as normal concrete. This research work attempts to improve the strength characteristics of concrete containing recycled coarse aggregate with the addition of admixtures (Micro-Silica and Superplasticizer) and Polypropylene fibre. Results showed that admixtures significantly improved the workability and mechanical properties of CRCA at all RCA replacement levels. Addition of PPF had significant effect on the flexural and splitting tensile strengths of CRCA, but not much impact on the compressive strength.
MODELING THE TENSILE STRENGTH OF CONCRETE WITH POLYETHYLENE TEREPHTHALATE (PET) WASTE AS REPLACEMENT FOR FINE AGGREGATE USING ARTIFICIAL NEURAL NETWORK
Authors: AJAGBE WASIU , TIJANI MURTADHA , ODUKOYA OLUWAFEMI
Published: March 2023

Tensile strength of concrete made with polyethylene terephthalate (PET) waste as replacement for fine aggregate was modelled using artificial neural network. A multilayer feedforward neural network (MLFFNN) and radial basis function (RBF) methodology were compared to see which was more accurate. The MLFFNN modelling results showed a predictive accuracy of 95.364% and a root mean square error value of 4.4409 × 10-16 while RBF neural network modeling results showed a higher predictive accuracy (99.509%) with a lower root mean square error value (1.6653 × 10-16). It is concluded that ANN models accurately predicted the tensile strength of PET concrete.