bluuebunny/crossref_metadata_2025 huggingface dataset:
Chemical identification of new particle formation and growth precursors through positive matrix factorization of ambient ion measurements
Authors: Katz Daniel John , Abdelhamid Aroob , Stark Harald , Canagaratna Manjula R. , Worsnop Douglas R. , Browne Eleanor C.
Published: May 2023

Abstract. In the lower troposphere, rapid collisions between ions
and trace gases result in the transfer of positive charge to the highest
proton affinity species and negative charge to the lowest proton affinity
species. Measurements of the chemical composition of ambient ions thus
provide direct insight into the most acidic and basic trace gases and their
ion–molecule clusters – compounds thought to be important for new particle
formation and growth. We deployed an atmospheric pressure interface
time-of-flight mass spectrometer (APi-ToF) to measure ambient ion chemical
composition during the 2016 Holistic Interactions of Shallow Clouds,
Aerosols, and Land Ecosystems (HI-SCALE) campaign at the United States
Department of Energy Atmospheric Radiation Measurement facility in the
Southern Great Plains (SGP), an agricultural region. Cations and anions were
measured for alternating periods of ∼ 24 h over 1 month.
We use binned positive matrix factorization (binPMF) and generalized Kendrick
analysis (GKA) to obtain information about the chemical
formulas and temporal variation in ionic composition without the need for
averaging over a long timescale or a priori high-resolution peak fitting.
Negative ions consist of strong acids including sulfuric and nitric acid,
organosulfates, and clusters of NO3- with highly oxygenated organic
molecules (HOMs) derived from monoterpene (MT) and sesquiterpene (SQT) oxidation.
Organonitrates derived from SQTs account for most of the HOM
signal. Combined with the diel profiles and back trajectory analysis, these
results suggest that NO3 radical chemistry is active at this site.
SQT oxidation products likely contribute to particle growth at the
SGP site. The positive ions consist of bases including alkyl pyridines and
amines and a series of high-mass species. Nearly all the positive ions
contained only one nitrogen atom and in general support ammonia and amines
as being the dominant bases that could participate in new particle
formation. Overall, this work demonstrates how APi-ToF measurements combined
with binPMF analysis can provide insight into the temporal evolution of
compounds important for new particle formation and growth.
Pace v0.2: a Python-based performance-portable atmospheric model
Authors: Dahm Johann , Davis Eddie , Deconinck Florian , Elbert Oliver , George Rhea , McGibbon Jeremy , Wicky Tobias , Wu Elynn , Kung Christopher , Ben-Nun Tal , Harris Lucas , Groner Linus , Fuhrer Oliver
Published: May 2023

Abstract. Progress in leveraging current and emerging high-performance computing infrastructures using traditional weather and climate models has been
slow. This has become known more broadly as the software productivity gap. With the end of Moore's law driving forward rapid specialization of
hardware architectures, building simulation codes on a low-level language with hardware-specific optimizations is a significant risk. As a
solution, we present Pace, an implementation of the nonhydrostatic FV3 dynamical core and GFDL cloud microphysics scheme which is entirely
Python-based. In order to achieve high performance on a diverse set of hardware architectures, Pace is written using the GT4Py domain-specific
language. We demonstrate that with this approach we can achieve portability and performance, while significantly improving the readability and
maintainability of the code as compared to the Fortran reference implementation. We show that Pace can run at scale on leadership-class
supercomputers and achieve performance speeds 3.5–4 times faster than the Fortran code on GPU-accelerated supercomputers. Furthermore, we
demonstrate how a Python-based simulation code facilitates existing or enables entirely new use cases and workflows. Pace demonstrates how a
high-level language can insulate us from disruptive changes, provide a more productive development environment, and facilitate the integration with
new technologies such as machine learning.
SnowQM 1.0: A fast R Package for bias-correcting spatial fields of snow water equivalent using quantile mapping
Authors: Michel Adrien , Aschauer Johannes , Jonas Tobias , Gubler Stefanie , Kotlarski Sven , Marty Christoph
Published: May 2023

Abstract. Snow cover plays a crucial role in regional climate systems worldwide. It is a key variable in the context of climate change because of its direct feedback to the climate system, while at the same time being very sensitive to climate change. Accurate long-term spatial data on snow cover are scarce, due to the lack of satellite data or forcing data to run land surface models back in time. This study presents an R package, SnowQM, designed to correct for the bias in long-term spatial snow water equivalent data, using more accurate data for calibrating the correction. The correction is based on the widely applied quantile mapping approach. A new method of spatial and temporal clustering of the data points is used to calculate the quantile distributions. The main functions of the package are written in C++ to achieve high performance and to allow parallel computing. In a case study over Switzerland, where a 60-year snow water equivalent climatology is produced at a resolution of 1 day and 1 km, SnowQM reduces the bias in snow water equivalent from −9 mm to −2 mm in winter and from −41 mm to −2 mm in spring. It is also significantly faster than pure R implementations. The limitations of the quantile mapping approach for snow, such as snow creation, are discussed. The proposed spatial clustering improves the correction in homogeneous terrain, which opens the way for further use with other variables.
Prevalencia y factores asociados del síndrome de burnout en el personal de salud que labora en pediatría y neonatología
Authors: Anbousi Calderón Samia Andrea , Chalco Navas Jorge Hernán , Endara Dávila Pablo Francisco
Published: May 2023

Introducción: La carga laboral y los resultados de síndrome de Burnout (SB) en personal que labora en las áreas de pediatría y neonatología parece relacionarse con el tiempo de permanencia en el área de trabajo. El propósito del estudio fue evaluar la asociación entre factores laborales y sociodemográficos con el Síndrome de Burnout de un hospital público de alto flujo pediátrico en Quito, Ecuador.

Métodos: El presente estudio transversal se realizó con la participación del personal de salud de las áreas de pediatría y neonatología del Hospital General San Francisco, en Quito-Ecuador, entre enero a diciembre del 2021. Se midió la escala “Maslach Burnout Inventory Human Services”. La muestra es no probabilística. Se realiza un análisis bivariado comparando el personal con SB contra el personal sin SB. Se presenta un estudio de factores de riesgo con razón de probabilidades (OR).

Resultados: Fueron 135 trabajadores encuestados. La prevalencia del SB fue del 3.6% (IC 95%: 0.9 – 8.96). La “tendencia” a tener SB fue 90.09% (IC 95%: 82.83 – 94.49). El 54.05% (IC 95%: 44.3 – 63.6), No hubo diferencias entre edad, sexo, estado civil, y carga familiar entre los grupos de estudio. Se determinó que la labor de los postgradistas tuvo un OR 8.75 (2-38.1), P=0.004 y especialistas OR=4.5 (1.24-16.7), P=0.02, la carga horaria de 40 a 60 horas OR= 8.3 (2.81-24.6), P<0.0001 y más de 60 horas 12.1 (3.51-42.1), P<0.0001.

Conclusiones: La prevalencia de la tendencia a SB fue alta y la carga horaria se relaciona directamente con la presencia de SB en trabajadores del área de pediatría y neonatología.
Y aun parece que la aversión pasó más allá de la muerte: el arzobispo de Lima, Toribio Alfonso de Mogrovejo, y su némesis, el virrey don García Hurtado de Mendoza (siglos XVI-XVII)
Authors: Coello de la Rosa Alexandre
Published: May 2023

Este trabajo analiza dos textos panegíricos, los Hechos de don García Hurtado de Mendoza (1613, 2ª ed. 1616), de Cristóbal Suárez de Figueroa, sobre el IV marqués de Cañete, y la Vida del Ilustrísimo y Reverendísimo don Toribio Alfonso de Mogrovejo y Robles (1653), de Antonio de León Pinelo, sobre el segundo arzobispo de Lima. El artículo explora las tensiones y conflictos entre ambas personalidades a través de las voces de sus hagiógrafos y panegiristas, los cuales defendieron sus posicionamientos políticos incluso más allá de la muerte de sus protagonistas. Asimismo se reivindica los panegíricos y hagiografías como fuentes históricas en general, y en particular, la importancia del encomio en la construcción de la imagen pública de los virreyes y arzobispos del Perú.
La traslación y reducción del valle de Chicoana a lo largo del Camino Real al Perú. Siglos XVI a XIX, Salta, Argentina
Authors: Mignone Gambetta Pablo Ignacio
Published: May 2023

En este trabajo se identifican los mecanismos actuantes en la creación de un paisaje de dominación colonial en el valle de Lerma, Salta, Argentina, durante un proceso de larga duración comenzado con las primeras incursiones españolas hasta la consolidación del poder hispano-criollo (siglos XVI a XVIII). Realizamos desde una perspectiva espacial un análisis del traslado de los pueblos de indios desde el valle Calchaquí, densamente poblado y rebelde al poder colonial, al valle de Lerma contiguo. Esta mirada nos permite plantear que las reducciones indígenas creadas a partir de las desnaturalizaciones del siglo XVII con las poblaciones vencidas en las guerras de pacificación, buscaron recrear el paisaje calchaquí tal como fue percibido por los conquistadores desde los primeros momentos de su presencia en la zona. La lectura crítica de la documentación histórica ofrece un panorama acabado de los mecanismos por los cuales un valle de 250 km de extensión pudo caber, guerras y desmembramientos mediante, en una legua cuadrada en el transcurso de 150 años de dominación colonial, manteniendo sin embargo, similares marcadores paisajísticos y disposiciones étnicas aunque distorsionadas según percepciones, representaciones y prácticas del poder español en el Tucumán.
Does Innovation and Foreign Direct Investment Affect Renewable Energy Consumption? Evidence from Developing Countries
Authors: Shahzadi Hafiza Nabila , Ali Muhammad , Ghafoor Rana Kashan , Rahman Saif Ur
Published: May 2023

The purpose of the study to analyze the long-run and short-run effects of foreign direct investment, technological innovation, economic growth, and greenhouse gas emission has show the impact in developing countries from 1991 to 2021on renewable energy. Applying dynamic panel ARDL technique, the outcomes confirm that, economic growth, foreign direct financing and technological innovations take a negative impact on sources of energy. However, greenhouse gas emission has a significant positive influence on renewable energy. The impression of economic growth, FDI, and technological innovation, is positive, fostering to energy use and greenhouse emissions in the developing countries. The practical remedies are exclusive and give policy suggestions; such as, financial markets in the developing countries must be encouraged for the reason that they are the core determinants of the renewable energy sector and economic growth, reducing greenhouse emissions. Moreover, investment in the R&D of technological innovations is much needed in these countries.
Analysis of compliance of experimental steels for railway rails with modern standards of Ukraine and the EU
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Podolskyi R. V. , Safronova Е. А. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Merkulov O. Ye. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Kononenko G. A. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Babachenko O. I. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Safronov O. L. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: May 2023

The process of operating vehicles determines the interaction of the wheel and rail. Traffic safety and the main technical and economic indicators of track management and rolling stock largely depend on these parameters. The result of this interaction are changes in the metal, which arise from rolling friction and especially from the friction of the wheel sliding on the rail during braking, due to these changes, the wheels of the rolling stock wear out. The purpose od the work is to research of the microstructure and mechanical properties of steels of promising chemical compositions to meet modern requirements for railway rails. Methods of metallographic analysis, determination of mechanical properties, and chemical analysis were used. Samples made from laboratory melts of steels with a promising chemical composition served as material for detailed microstructure studies. When comparing prospective chemical compositions, it was established that steel 1 meets the requirements of DSTU EN 13674:2018 for basic chemical elements and has differences according to DSTU 4344:2004, namely: increased carbon content. When comparing the experimental chemical composition of steel 2, it was found that this steel does not meet the requirements of DSTU EN 13674:2018 and DSTU 4344:2004, namely: a reduced amount of carbon and an increased content of silicon, chromium and molybdenum. According to the results of the analysis of the values of mechanical properties, it was established that steel 1 and 2 meets the requirements of DSTU EN 13674:2018. Steel 1 does not meet the requirements of DSTU 4344:2004 in terms of yield strength and relative narrowing, and steel 2 does not meet the requirements of DSTU 4344:2004 for the highest category of rails in terms of temporary resistance values. Based on the results of the microstructure studies, it was established that the test steel 1 after heat treatment has a structure of highly dispersed pearlite with a small amount of coarse-plate pearlite. When analyzing the microstructure of steel with a promising chemical composition 2, it was established that the structure consists of carbide-free bainite.
Modeling of metal melts at the level of interatomic interaction
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Togobitskaya D. N. , Snihura I. R. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: May 2023

The purpose of the work is to create a complex of basic models for predicting the primary physicochemical and thermophysical properties of metal melts for the targeted formation of a high-quality metal product and increasing its competitiveness. The basis for modeling is the original concept of directional chemical bonding, the core of which is the consideration of metal melts as chemically unified systems, rather than a mechanical mixture of constituent elements, and taking into account the contribution of all components, even in small concentrations. The work uses an important information component, which is a database on the properties of metallurgical melts, which is continuously updated with modern data and contains the results of own and industrial experimental research and literature search (articles, patents, inventions, scientific developments, monographs). The importance of databases is indisputable and requires them to be brought to the inter-branch and inter-university level with open access, as a separate instance for promoting the development of the scientific level and the capabilities of scientists. Adequate mathematical models were developed based on integral parameters of interatomic interaction, and additional consideration of micro-heterogeneity parameters in their structural formation ensured high accuracy of operational forecast (R2≥0.9). A comparative analysis of the obtained melting results with the corresponding calculations based on the JMatPro software complex confirmed the effectiveness of using the interatomic interaction parameters as model ones. The results of the research are recommended for use in industrial conditions for the purpose of targeted formation of the composition and properties of smelting products, as well as reducing energy costs and reducing defects due to the adoption of operational management technological decisions with the help of the integration of the developed models in the automated control systems of technological processes of steelmaking.
Study of the influence of cryogene processing on the characteristics of structure formation and fatigue resistance of 38KHN3MFA steel after preliminary thermal hardening
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Bobyr S. V. , Parusov E. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Golubenko T. M. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Baranovska O. E. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Chuiko I. M. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: May 2023

The purpose of the work is to study the influence of complex heat treatment on the peculiarities of the formation of the structure and properties of carbon steel alloyed with chromium, nickel, molybdenum and vanadium. Currently, carbon alloy steels (38CrNi3MoV, 65Cr3SiMoV, 80Cr3MoV) containing chromium, molybdenum, nickel, vanadium and other expensive chemical elements are used for the production of various metallurgical and machine-building products (rolling rolls, rulers, piercing mandrels, parts of power equipment). However, the wear resistance of finished products made of specified steels in harsh operating conditions (significant cyclic loads and elevated temperatures) is insufficient in practice. One of the methods of effective influence on the improvement of the operational resistance of alloyed carbon steels may be the use of cryogenic treatment after preliminary thermal hardening. The results of studies of the effect and duration of cryogenic treatment on the features of structure formation, microhardness, hardness, and wear resistance of 38CrNi3MoV steel previously subjected to thermal hardening are presented. It was established that the duration of exposure of 38CrNi3MoV steel in liquid nitrogen should be at least 1.0 hours, which allows to achieve an increase in microhardness and wear resistance by 12 % and 17.4 %, respectively. The obtained results allow us to state that the use of cryogenic treatment at the final stage of thermal hardening will ensure an increase in the operational durability of products of special purpose, which are made of 38CrNi3MoV steel. The developed method can be recommended for the industrial implementation of the technology of complex heat treatment of carbon steels with increased wear resistance, which additionally contain chromium, nickel, molybdenum and vanadium.
Features of wear of friction couples of rope-block and rope-drum under the working conditions of lifting and traction devices
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Parusov E. V. , Gubenko S. I. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine,   Prydniprovska State Academy of Civil Engineering and Architecture, Parusov O. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: May 2023

The features of wear of rope-block and rope-drum friction pairs of lifting and traction devices operating in the conditions of a hot manufactory of the metallurgical plant and also the mining and beneficiation plant were studied. It is shown that the causes of wear of the elements of the rope-block and rope-drum friction pairs are the interaction in their contact zones, which occurs in the surface layers under the influence of high contact stresses, friction, cyclic loads, abrasive particles, active atmospheric and industrial environments. It was found that these actions lead to irreversible processes of accumulation of stresses and plastic shifts, which have a periodic and heterogeneous character. It is shown that the strength of the lifting or traction rope is determined by the degree of wear of the wires, primarily those in contact with the block and the drum. The structural changes in the surface layers of the wires and the mechanisms of the formation of wear particles were analyzed, which confirm the heterogeneous nature of the wear of the wires in the strands of the rope. Areas of abrasive wear were also observed on the worn surface of the wires, where under the action of solid foreign particles of contamination with sharp corners falling between the wires, the surface of the wires was undercut. It is shown that the presence of non-metallic inclusions leads to the formation of wear particles and fatigue cracks. It was established that the wear of friction pairs of rope-block and rope-drum of hoisting and traction devices has a fatigue-corrosive nature, and the main mechanism of the formation of wear particles is the development of plastic shifts in the surface layers of friction pairs and their separation by plastic exfoliation and abrasive and corrosive destruction. The shape of the wear particles depends on the type of material and the conditions of their formation. It is proposed to take measures regarding structural approaches to friction pairs, taking into account their working conditions, in order to reduce contact stresses and increase their wear resistance, reliability and durability.
Implementation of mathematical models of material and heat balances of blast furnace smelting as part of the ACS TP of PJSC "MK "Azovstal"
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Chaika O. L. , Kornilov B. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Lebid V. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Moskalyna A. O. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Shumelchyk Ye. I. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Dzhyhota M. H. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: May 2023

On the basis of blast furnace operation data of PJSC "MK "Azovstal", an information system has been developed, which is based on mathematical models of material and heat balances of blast furnace smelting developed at the Institute of Ferrous Metallurgy of the National Academy of Sciences of Ukraine. The calculation of the material balance is carried out according to the "accounting system" of V. P. Izhevskii. The thermal energy model of I. D. Semikin is used to calculate the heat balance, which was developed for use in blast furnace production by O. V. Borodulin. The article describes the information system of calculating mathematical models. The information system allows you to calculate balances in automatic mode (collection of data from automatic control system of technological process (ACS TP) and calculation of material and heat balances for the selected period) and in manual mode (calculation of forecast periods to determine reserves for increasing the energy efficiency of blast furnace smelting). The models were adapted by calculating the material and heat balances of blast furnace melting and determining the inconsistencies. Monthly calculations of the material and heat balances of the blast furnaces were performed to adapt the models installed in the ACS TP of the blast furnace workshop of PJSC "MK "Azovstal". Inconsistencies in the overall material balances of the furnaces (the difference between the total input of materials into the furnace and smelting products) and by components (iron, carbon, etc.) were determined. It was established that when using the estimated amount of blast furnace dust at all blast furnaces of PJSC "MK "Azovstal", the amount of discrepancy between the arrival and consumption of materials lies within the credible range of error (<1,5%). Using the results of the calculation of heat balances, a comparison of the Inconsistencies of the blast furnaces was made (the ratio of the calculated indicators to the actual ones). Mathematical models of balances were implemented as part of the ACS TP of the blast furnace workshop of PJSC "MK "Azovstal" and were used to assess deviations from production norms, consumption of coke and conventional fuel, as well as forecast the possibility of improving the technical and economic indicators of smelting.
Herramientas Comunicacionales para el Diseño, Difusión y Medición de Impacto del Manual de Inducción para el Público Interno de la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO)
Authors: Gosalvez Aguilera Diego Rubén
Published: May 2023

La existencia de un manual de inducción en toda organización es importante, por eso se diseñó uno para todo el público interno de la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO). Este manual es un documento muy importante para dicho público, ya que mediante él cada funcionario pudo saber dónde consultar cuando tenga alguna duda, curiosidad o inquietud sobre la organización, sobre sus funciones y sobre información que conlleva su trabajo. Al tener listo el manual de inducción, se procedió a difundirlo de manera interna, primero de manera general, y luego a cada uno de los funcionarios. En una fase posterior se procedió a medir el impacto de dicho manual con el uso de herramientas como ser la encuesta y las entrevistas. Esta fase fue muy importante porque se supo cuál es la opinión y primera evaluación del público interno hacia una primera versión del manual. Para concluir, se corrigió el manual para que éste sirva de manera eficaz a todo el público objetivo y se hicieron algunas recomendaciones. Se recomendó el monitoreo constante hacia el públicoz interno, ya que en cualquier momento ingresan nuevos funcionarios y estos tendrán dudas que haya que aclarar.
Comunicación y Política el Poder y la Influencia de los Medios en Bolivia
Authors: Coca Fíorílo José Antonio
Published: May 2023

Los medios de comunicación social y particularmente la televisión y el Internet, como tecnología de información y comunicación, han evolucionado hasta niveles en los que es posible considerar espacios de participación e interacción social nunca antes sospechados. Creando, en el proceso, una estela de influencias sobre la sociedad y la clase política de nuestro contexto. No obstante, la clase política ha visto un nuevo despertar en los medios de masas al devolver favores e influenciarlos (a los medios de comunicación masivos) y seducirlos hacia el campo de la política.
Propuesta de Modificación a la Ley 1322 "Ley de Derecho de Autor" y Propuesta para una Nueva Conceptualización de los Derechos de Autor en el Estado Plurinacional de Bolivia en el Marco de la Sociedad del Conocimiento
Authors: Guzmán Gumucio Luis Gonzalo
Published: May 2023

Para poder encontrar una solución a las nuevas problemáticas de los derechos de autor acaecidas por la aparición de la Sociedad del Conocimiento y las Tecnologías de la Información y la Comunicación (TICs), se ha investigado el desarrollo historia de la propiedad intelectual con el objetivo de encontrar los fundamentos doctrinales básicos de esta área del derecho. Utilizando una investigación deductiva, transeccional y descriptiva se ha estudiado algunos de los fenómenos económicos y culturales que componen el marco de evolución de los derechos de autor y que han influido en su injerencia en varios aspectos labores y económicos en la actualidad. Entre los principales objetivos de la investigación está la de poder conciliar tanto las necesidades educativas de los lectores ­que se ven beneficiadas con las obras literarias­ y las imperantes necesidades de los autores ­que ven amenazadas sus más básicos derechos debido a la proliferación de la piratería y la distribución masiva e ilegal de su material.
Estrategia de Negociación Comercial a través de la Participación en Ferias Internacionales para Promover la Exportación de Productos Artesanales Caso: Organización "Creaciones Arte Ruby" en la Feria Colombiana Farex 2014-2015
Authors: Rojas Villavicencio Adriana Farideh
Published: May 2023

"Creaciones Arte Ruby", es una organización artesanal que se dedica a la artesanía en porcelana fría, presentando una variedad de diseños. En el mercado local ha gozado de gran acogida entre aquellas empresas que fidelizan a sus clientes mediante materiales POP. FAR EX-Colombia es una muy reconocida feria de artesanías de exportación, la cual se lleva a cabo en Cartagena de Indias, constituyendo uno de los espacios donde se presentan los mejores productos artesanales, y que abre sus puertas a participantes y visitantes nacionales e internacionales. Esta feria tiene lugar anualmente, con el fin de apoyar y fortalecer a artesanos colombianos e internacionales. De esta manera, el presente proyecto presentó una estrategia de negociación comercial adecuada para los productos artesanales de "Creaciones Arte Ruby", con el fin de ser utilizada en ferias internacionales para promover sus productos. Para ello se propuso que la microempresa comience participando en la feria colombiana FAREX. El proceso de investigación estuvo compuesto por entrevistas que fueron aplicadas a personas clave; así como al representante de la microempresa, representantes artesanos que participaron en eventos de similares características, encargados de ferias y negocios de Colombia en Bolivia. Los resultados obtenidos de la investigación mostraron la importancia de la implementación de una estrategia comercial a la hora de participar en este tipo de eventos. Con la implementación y uso de las herramientas adecuadas se mejorará de sobremanera la participación de productos artesanales, logrando negociaciones importantes.
Typical Pulmonary Carcinoid Tumours and the Relevance of Ki-67 Index: A Tertiary Centre Experience in South Australia
Authors:   Typical Pulmonary Carcinoid Tumours and the Relevance ofKi-67 Index: A Tertiary Centre Experience in South Australia, A Li ,   Typical Pulmonary Carcinoid Tumours and the Relevance ofKi-67 Index: A Tertiary Centre Experience in South Australia
Published: May 2023

Pulmonary carcinoid tumours are a rare type of neuroendocrine primary lung malignancy. The WHO classifies carcinoids as typical (TC) and Atypical Carcinoid (AC) based on mitotic rate and necrosis on histology [1,2]. It is widely accepted that TC has a better overall prognosis than AC. A higher stage (the presence of nodal or metastatic disease) at presentation is correlated with poorer outcomes [3].
Epitaxial Nitride Thin Films and Heterostructures: Emerging Applications and Future Prospects
Authors: Saha Bivas
Published: May 2023

Nitride thin films and heterostructures have been at the forefront of innovation and discovery for decades. While GaN remains one of the most famous nitride semiconductors, recent years have seen the rise of several transition metal and rare-earth nitride semiconductors, metals, and their heterostructures. In this talk, I will present our research on epitaxial nitride thin film semiconductors and metal/semiconductor superlattices for various nanophotonic, neuromorphic computing, and phase-change material applications.
A Study on the Relationship between Receptive/Productive Vocabulary Knowledge Size and Vocabulary Learning Strategy among Arabic Learners in Korea
Authors:   The Institute of Middle East, Mun Ji-Young
Published: May 2023

This research explores the relationship between vocabulary learning strategy and receptive and productive vocabulary knowledge size to examine more effective Arabic learning methods. In order to ask research questions, a questionnaire survey was conducted on 30 Arabic learners (First Year, 2nd Semester) in Hankuk University of Foreign Studies on receptive and productive vocabulary knowledge tests and vocabulary learning strategies. The results are as follows.
First, receptive knowledge size is bigger than productive knowledge size, and there is a positive relationship between the two. Second, receptive and productive knowledge size turned out to be related to the all subcategories of vocabulary learning strategies. Accordingly, the bigger the receptive and productive knowledge size, the more diverse vocabulary learning strategies were being used. Third, the students whose receptive vocabulary knowledge size was big used all available vocabulary learning strategies compared to those with low receptive vocabulary knowledge size. The students with big vocabulary knowledge size showed differences in five subcategories of vocabulary learning, excluding social strategy under meaning discovery. Fourth, the learning group with big differences in receptive and productive vocabulary knowledge size, showed differences in five vocabulary learning strategies compared to the group with big size except for social strategies in meaning discovery strategies.
A Comparative Study on the International Migration of Workers in Tunisia and Egypt
Authors:   The Institute of Middle East, Lee Kyung-Soo , Kim Eun-Ji
Published: May 2023

The North African region has served as a destination, transit point, and departure point for migration for a long time. And the overseas migration of nationals and foreigners continues steadily from this region. Within the region, Tunisia and Egypt are the places where mass protests broke out due to the economic crisis and political issues in early 2011. However, there has been no significant change in emigration flow since then. Accordingly, this study presents the migration flows in Tunisia and Egypt. Then it conducts a comparative analysis to examine the characteristics of the migration flows of the two countries. The two countries show differences in various aspects, such as destination countries, patterns of migration, features of migrant populations, and current national migration policies. However, at the same time, there are similarities in implementing government policies to encourage the overseas migration of its people and the variety of migration destinations, especially of highly skilled and highly educated workers heading to North America among the younger generation. In addition to the economic causes considered in this study, it can be inferred that migration patterns may appear differently depending on colonial, cultural, and social characteristics in that migration patterns are different between Tunisia, which belongs to the Maghreb region, and Egypt, which does not belong to the Maghreb region.
The Effect of the Face-to-Face, Online, and Blended Teaching Modes on Students' Performance in Listening
Authors: Aliyah Hassan Fatin , Amirah Nabihah Zainal Abidin Nur , Fadhlina Zainal Abedin Nur , Purwarno Purwarno, , Shanthi Alice
Published: May 2023

Second-language learners must learn to listen. Effective listening helps learners understand others and express their thoughts and opinions. This study examines the students' achievement in listening tests conducted after teaching and learning processes using face-to-face, online, and blended modes. The respondents were selected using purposive sampling. The data for the study consist of secondary data collected from 392 participants from different faculties at a local public university. The data were then analyzed using the SPSS version 20 tool. The results indicate a significant difference in teaching and learning modes and students' achievement in listening tests. Next, the findings showed that the blended learning mode produced the lowest listening test score, while the face-to-face mode produced the highest test scores. Finally, there was a significant difference between faculties in their listening performance. The findings of this study suggest that even though teaching listening using the blended mode gives the best of both the online and face-to-face methods, but if students are not engaged in the online learning part, they may not be able to follow the offline or face-to-face learning part effectively. This assumption needs further investigation by including more private and public universities and examining if a similar outcome may prevail.
Evaluación de la harina integral de zapallo en los parámetros productivos y la pigmentación de la yema de huevo
Authors: Mendoza-Rivadeneira Freddy Alain , Vargas-Zambrano Plinio Abelardo , Solórzano-Vera María José , Párraga-Alava Ramona Cecilia , Vivas-Arturo Walter Fernando , Alcivar-Hidrovo Juan Horacio
Published: May 2023

El objetivo de esta investigación fue evaluar el efecto de la sustitución de maíz en tres niveles por harina integral de zapallo –HIZ– (0; 5 y 10 %) sobre los parámetros productivos y pigmentación de la yema de huevo de gallinas ponedoras. Se utilizaron 240 gallinas de 52 semanas (sem) de edad y un peso promedio de 1,98 kilogramos –kg–, de la línea Hy-Line Brown, las cuales se ubicaron en un galpón dividido en compartimientos para cada unidad experimental durante 45 días. Se aplicó un diseño experimental completamente aleatorizado para los 3 tratamientos (0, 5 y 10 % HIZ) con 3 repeticiones y un total de 80 gallinas por unidad experimental. Las variables evaluadas fueron consumo de alimento, incremento de peso, conversión alimenticia, producción y peso de huevo y la pigmentación de la yema. Se presentaron diferencias estadísticas (P<0,05) en las variables consumo de alimento (8,25 ± 0,02 kg), incremento de peso (1.923 ± 109 g), y peso por huevo (60,28 ± 1,52 g) y pigmentación de la yema (escala Hy-Line International); mientras que en conversión alimenticia, producción de huevo no existieron diferencias estadísticas (P<0,05); por lo cual se puede concluir que la sustitución parcial de HIZ por harina de maíz en las dietas de gallinas ponedoras si influye positivamente en los parámetros productivos y pigmentación de la yema de huevo.
Tipificación molecular de especies de Brucella en ganaderías lecheras de la provincia del Azuay – Ecuador
Authors: Andrade-Guzmán Omar Santiago , Vallecillo Antonio Javier , Vintimilla-Rojas Andrea Elizabeth , Haro-Haro Andrés Norberto , Agreda-Orellana Ivanna Solmayra , Vintimilla-Rojas Daniela Alejandra , Rivera-Pirela Sergio Emiro
Published: May 2023

La Brucelosis es una enfermedad zoonótica extendida a nivel mundial en el ganado bovino, ocasionada principalmente por Brucella abortus, previamente reportada en ciertas regiones del Ecuador. La caracterización de las cepas circulantes de Brucella spp. en ganaderías lecheras resulta importante para comprender la epidemiología de esta enfermedad. La tipificación bacteriológica de la Brucella spp. es un proceso lento, riesgoso y requiere de laboratorios especializados. El objetivo de este estudio fue tipificar las cepas de Brucella spp. que afectan al ganado bovino en la provincia del Azuay, mediante ensayos moleculares, a partir de muestras de sangre y leche de vacas seropositivas a brucelosis. En fincas seropositivas a ELISA-Indirecto en leche, se seleccionaron 70 vacas Holstein mestizas, reactoras individualmente a las pruebas Rosa de Bengala y confirmadas con ELISA competitivo. Se extrajo el ADN de esas muestras de sangre y leche confirmando en un inicio la viabilidad del material genético de bovino con oligonucleótidos específicos para el género Bos. La amplificación de ADN para Brucella spp. se realizó por PCR-AMOS con cebadores de genero para la región IS711 y de especie para Brucella abortus, Brucella mellitensis, Brucella suis y Brucella ovis. Se pudo identificar ADN bovino en 65 (92,8 %) muestras de leche y en 62 (88,5 %) muestras de sangre. Un total de 62 muestras de ADN extraído de leche resultaron positivas (95,4 %) al género Brucella spp. y todas las muestras de sangre resultaron negativas. El PCR-AMOS mostró bandas con un peso molecular de 498 pb en muestras de cuatro animales correspondiente a B. abortus. Este es el primer estudio de identificación molecular en la provincia del Azuay con evidencia científica de la especie de Brucella spp. circulante en las ganaderías bovinas de la zona, contribuyendo de base para la identificación futura de los biovares de B. abortus aún no reportados en esta zona del país.
Physicochemical and structural properties of beef meat thawed using various methods
Authors: Lakehal Saliha , Lakehal Aicha , Lakehal Salima , Bennoune Omar , Ayachi Ammar
Published: May 2023

Four meat thawing techniques that are most commonly used in daily life were used: refrigerator thawing, microwave thawing, ambient temperature thawing, and water thawing, to evaluate the physico-chemical and histological alterations in thawed beef. After thawing, the structural, chemical, and physical characteristics of beef meat were evaluated. The results showed that meat thawed in the refrigerator at 4°C was characterized by the highest pH value (5.65 ± 0.02) and a significant difference (P<0.05) compared to meat thawed by other thawing methods. Also for the electrical conductivity, it reached the highest value (1.442 ± 1,012) in the microwave oven (P<0.05); meanwhile, water activity decreased significantly after thawing regardless of the thawing method (P<0.05). On the other hand, refrigerator thawing resulted in the least amount of water loss (1.23%) with P<0.05, while high levels of microwave energy caused significant water loss, represented by thawing loss and cooking loss (4.37% and 44.47%), respectively, with P<0.05. Among different thawing methods, microwave thawing had the highest level of TBARS, with a mean of 0.25 ± 0.034 mg·kg-1 (P<0.05). Regarding the color, the lightness (L*) value in the microwave-thawed samples decreased significantly (P<0.05) compared to the fresh control. Histologically, samples that were thawed in a refrigerator preserved the integrity of the fibers' structure after thawing better than other methods; samples thawed in a microwave, however, caused more structural damage. To ensure that it thaws uniformly and to retain the meat's quality as close to its fresh quality as possible, it is typically advised to thaw meat in a slower, more gradual manner, such as in the refrigerator.
Strategy For Organizing An Excellent School In Yogyakarta City
Authors: Nisa' Choirun
Published: May 2023

Background: The objective of this study was to analyze the implementation of social attitudes consist of honesty, discipline, responsibility, and tolerance in the elementary schools of Karanganyar Regency, Indonesia. 

Method: The research method used is a qualitative method, with a phenomenological approach. The research sites are Primary Primary School, SD Muhammadiyah Sokonandi, SD Negeri Ungaran, and SD Tumbuh 2. Research informants are principals, teachers, employees, and school committees—data collection techniques by observation, interviews, and documentation. The qualitative data analysis technique used the Miles and Huberman model. They are testing the validity of the data with extended observations and triangulation. 

Result: The study results found that: 1) the three elementary schools used different strategies, SD Muh Sokonandi with Ormas and kinship, Ungaran 1 State Elementary School with the Government, and Growing 2 Elementary School with the YEAN Foundation in collaboration with Cambridge. 2) Besides the differences in school strategies, they also have similarities in the use of Website technology as a promotional medium. 3) The three Excellent Elementary Schools with A accreditation, academic achievements, and extracurricular activities are exemplary. SD Muh Sokonandi has school excellence, the number of students, and the moral education of students. SD Negeri Ungaran 1, has the advantage, as a school coach, having the right to conduct elementary school development. Meanwhile, SD Tumbuh 2 has the advantage of the Art-Culture Museum program and collaboration with Cambridge International Primary Program (CIPP), England. Also, the use of Website technology as a promotional medium has similarities. 3) The three primary schools are excellent, with A accreditation, exemplary academic achievements and extracurricular activities. SD Muh Sokonandi has school excellence, the number of students, and the moral education of students. SD Negeri Ungaran 1 has the advantage, as a school coach, having the right to conduct elementary school development. Meanwhile, SD Tumbuh 2 has the advantage of the Art-Culture Museum program and collaboration with Cambridge International Primary Program (CIPP), England. Also have similarities in the use of Website technology as a promotional medium. 3) The three primary schools are excellent, with A accreditation, exemplary academic achievements and extracurricular activities. SD Muh Sokonandi has school excellence, the number of students and the moral education of students. SD Negeri Ungaran 1, has the advantage, as a school coach, having the right to conduct elementary school development. Meanwhile, SD Tumbuh 2 has the advantage of the Art-Culture Museum program and collaboration with Cambridge International Primary Program (CIPP), England.

Novelty: The present study revealed the Strategy for Organizing an Excellent Schools
Can Domino Card Be Effective in Elementary School Instruction?
Authors: Azahra Nanda , Dewi Sri Enggar Kencana
Published: May 2023

Background:The problem in this study is whether there is an effect of using domino card media on student learning outcomes. The purpose of this study was to obtain information about student learning outcomes by using domino cards as media.
Method:The research method used in this study was a quasi-experimental design with a nonequivalent control group research design. This study used two classes, namely VA and VB classes.
From the research results, it was found that in the experimental class the average value was 84.77 while in the control class the average value was 72.15. The results of the independent sample t-test obtained a sig. 2 tailed is 0.000 <0.05, it is known that there is a significant difference between the average learning outcomes in groups A and B.
Results: Based on the results of the analysis of the data obtained, it was concluded that learning by using domino card learning media can have an influence on student learning outcomes in Theme 6 Sub-theme 2 Learning 1 and 2 which can be seen from the difference in average learning outcomes in the experimental class and the control class.
Is Problem Based Learning Assisted by Pop Up Book Effective in Improving Problem Solving Ability and Attitude of Curiosity?
Authors: Ardani Raden Ajeng Savira , Amaral Lola Pinto
Published: May 2023

Backgrounds:. This study aims to determine the effect of the PBL model with the help of pop up book media on the ability to solve problems and the attitude of curiosity in the fourth grade corner material of MIN 2 Sukoharjo (Islamic Elementary School 2 Sukoharjo), Indonesia.
Methods:This research uses quantitative research with experimental research design which includes control and experimental classes. The control class uses the thematic learning model, while the experimental class uses the PBL learning model with the help of pop up book media. Data collection techniques through observation, documentation, tests and questionnaires. Data analysis technique using t-test and multiple classification ANOVA test.
Results:. Based on the results of data analysis, the value of tcount > ttable was obtained, namely the t-test of 5.14 > 5.14 and 4.37 > 2.04 while the ANOVA test was 2.49 > 2.44. Thus, it can be said that the PBL model assisted by pop up book media has an effect on the ability to solve problems and the attitude of curiosity in the fourth grade corner material of MIN 2 Sukoharjo.
Implications:The implications of this research are: First, primary school principals in Indonesia must provide policies that support developing learning models and making learning media more creative and innovative. Second, teachers must provide models and media that are more creative and innovative to overcome the low problem solving abilities and curiosity of students.
Novelty:This study reveals the implementation of the influence of the PBL model on problem solving and students' curiosity attitudes.