bluuebunny/crossref_metadata_2025 huggingface dataset:
Negative Allegory (Defamiliarization) in the Poetics of M. Gorky
Authors:   V.I. Vernadsky Crimean Federal University, Borisova Lyudmila M.
Published: March 2023

Allegory, originally the organizing principle of M. Gorky’s poetics, determines to a great extent the uniqueness of Gorky’s “romantic realism”. The article shows how the writer’s allegorical range expands over the years. Numerous examples of negative allegory (the estrangement device) in his prose are analyzed.
Teaching Maxim Gorky’s Creativity in Chinese Universities
Authors:   Peking University, Guangxuan Ren
Published: March 2023

After the founding of the People’s Republic of China M. Gorky work entered the classes of Chinese universities and became an important part of the course “History of Russian literature” at the Department of Russian language and literature. The understanding and study of the literature creation of M. Gorky by Chinese scholars are a gradually comprehensive and in-depth process, which is also manifested and reflected in the teaching of Gorky’s creation in Chinese universities.
Evaluación de la pertinencia social y educativa de las carreras de bibliotecología de la UNED, periodo 2010-2021
Authors: Faerron-Chavarría Ernesto , Meza-Pérez José Pablo
Published: March 2023

El objeto de análisis del presente ensayo es la evaluación de la pertinencia educativa y social de las carreras de bibliotecología de la Universidad Estatal a Distancia (UNED), entre el periodo de 2010 al 2021. El análisis parte de una reflexión desde el paradigma sociocrítico. Se aborda desde un enfoque mixto y utiliza la evaluación social, documental y estadística para identificar los hallazgos de las categorías: dimensión inclusión educativa, dimensión inclusión social y dimensión generación de conocimiento especializado. Los principales resultados que se identificaron fueron: amplia cobertura de oferta en el territorio nacional, amplia integración de las mujeres en el mercado laboral y una producción documental centrada en los temas relevantes para atender las necesidades territoriales a fin de integrar personas a la sociedad de la información, el conocimiento y el aprendizaje. Se valora que los programas mantienen una relación con los fines y objetivos de la UNED y han brindado un aporte significativo al desarrollo nacional, territorial y particularmente, a la movilidad social de las mujeres graduadas.
Is phase locking crucial to improve hearing thresholds in tinnitus patients?
Authors: Tziridis Konstantin , Schulze Holger
Published: March 2023

Temporal processing of auditory data plays a crucial role in our
proposed model of tinnitus development through stochastic resonance
(SR). The model assumes a physiological mechanism optimizing auditory
information transmission (as quantified by autocorrelation (AC)
analysis) into the brain by adding the optimal amount of neuronal noise
to otherwise subthreshold signals. We hypothesize that this takes place
at the second synapse of the auditory pathway in the dorsal cochlear
nucleus (DCN). We propose that after hearing loss, this neuronal noise
is increased in the affected frequency-band to improve hearing
thresholds at the cost of upward propagation of this added noise, which
finally may be perceived as tinnitus. We already showed the improvement
of hearing thresholds in a large population of patients. Until now, we
did not investigate the differences in hearing thresholds based on the
biological constraints of early auditory temporal processing (phase
locking) that is only possible up to frequencies of 5 kHz. In this
report, we grouped our patient database (N=47986) according to tinnitus
pitch (TP) of below (TP<5kHz) or above (TP>5kHz)
the 5 kHz limit or having no tinnitus (NT) and compared their mean
audiograms. We found that TP<5kHz patients showed
significantly better hearing thresholds than all other patient groups
independent of age. No improvement was seen for TP>5kHz
patients who even showed worse thresholds than NT patients for high
frequencies. These results are further evidence for our SR model of
tinnitus development and the existence of AC analysis at the level of
the DCN.
Retroperitoneal hematoma: An unexpected complication of anticoagulant therapy in COVID-19 patients
Authors: Vaskovic Igor , Udovicic Ivo , Stojic Mihailo , Arsenovic Ljiljana , Neskovic Vojislava
Published: March 2023

Introduction. Coronavirus disease 2019 (COVID-19) is associated with high inflammatory response, hemostatic disturbances, and high thrombotic risk. Despite thromboprophylaxis, a high incidence of thromboembolic events has been reported with a consequent increase in anticoagulant therapy from standard to intermediate or even therapeutic doses. However, published evidence on the incidence and outcome of the hemorrhagic complications of applied therapy is still limited. Outlines of cases. We present two female COVID-19 patients, treated with anticoagulant therapy who suffered from major spontaneous bleeding and retroperitoneal hematoma. The first, a 64-year-old patient, treated with non-invasive ventilation protocol in the Intensive Care Unit due to respiratory failure received a therapeutic dose of anticoagulant therapy adjusted to the anti-Xa assay. The cumulative dose of nadroparin was 150 IU/kg body weight/day. The second, a 60-year-old patient with the moderate clinical presentation on low flow oxygen support was treated with therapeutic doses of anticoagulant therapy calculated according to the body weight. Emergency open surgery was performed due to massive bleeding. No active surgical bleeding was detected, and retroperitoneal hematomas were assumed to be complications of the applied anticoagulant therapy. Both patients were discharged and fully recovered. Conclusion. Although rare, severe hemorrhage requires attention when considering anticoagulant therapy in COVID-19. Uncommon sites of spontaneous bleeding suggest additional evaluation on a case-by-case basis, given that a diagnosis is often delayed due to a lack of specific presenting symptoms. Further studies are needed to verify the risk-benefit ratio of different regiments of anticoagulant therapy in patients with COVID-19.
Relationship between work-related outcomes of healthcare professionals in transfusion medicine units
Authors: Simonovic Marija , Slavkovic Marko , Miric Marija , Eric Dragan
Published: March 2023

Introduction/Objective. Professional burnout has sparked academic interest as one of the phenomena with the most serious implications for healthcare employees? well-being. As burnout becomes an increasingly common issue in medical practice, more extensive research on its predictors is needed. This study aimed to examine whether and how job satisfaction and work-related burnout affect personal burnout. Methods. A structured questionnaire was used to collect primary data. The sample consists of 218 employees from transfusion medicine units located in five cities in the central part of Serbia. Descriptive statistical analysis, correlation, and hierarchical regression were applied. Results. We found the personal burnout is negatively affected by job satisfaction, predominantly by working conditions (? = -0,141, t = -2,780, p < 0.01), and positively impacted to work-related burnout (? = 0,690, t = 13,409, p < 0.001) indicated that workload has strong impact on personal life quality of healthcare professionals employed in blood banks. Conclusion. This research contributes to more comprehensive understanding of personal burnout factors. The findings of this study can be used to develop strategies to promote employee well-being and prevent burnout in different manifestations.
Quasi-static problem of thermoelasticity for layered shallow cylindrical shells of irregular structure
Authors:   Lviv Polytechnic National University, Musii R. , Zhydyk U. ,   Lviv Polytechnic National University, Voloshyn M. ,   Lviv Polytechnic National University, Sydorchuk O. ,   Lviv Polytechnic National University, Huk L. ,   Lviv Polytechnic National University, Rak N. ,   Lviv Polytechnic National University
Published: March 2023

For rectangular layered shallow cylindrical shells of irregular structure, the quasi-static problem of unbound thermoelasticity is formulated. As a mathematical model, the equations of the shear theory of shallow shells of Timoshenko type are used. The closed solution for the formulated problem is found by the methods of integral transformations. The distribution of temperature, displacements, forces and moments in a two-layer cylindrical shell under local convective heating is analyzed numerically.
CHARACTERISTICS OF BEHAVIOUR STYLES OF MEDICAL PERSONNEL IN CONFLICT SITUATIONS
Authors: Biduchak A.S. , Gorachuk V.V. , Hopko N.V.
Published: March 2023

The development of the personality of medical managers, especially the managementstyle, is an important condition for the management effectiveness of medical institutions.Leadership styles reflect the systems of methods, techniques and behaviour that guideactivities as a whole and are typical for the leaders of health care institutions.The aim of the study – to determine management styles in conflict situations amongmedical workers and to justify the role and place of the leader in the effective managementof a medical institution.Materials and methods. The opinion of 582 medical workers (422 (72,5%) doctors and160 (27,5%) nurses) in hospitals and primary care centers of Chernivtsi region was studiedin the research by means of direct individual survey (anonymous individual interview).The questionnaire was aimed at an in-depth study of conflict situations in medical teams,allowing participants to express their opinion freely, without pressure.Results. The main management styles, peculiar to the personality of the medical managerare highlighted: authoritarian, liberal and democratic, which are formed in the processof activity and are able to change during working activity, they can be adjusted anddeveloped, taking into account cultural values, individual characteristics and traditionsof the medical organization. It has beens established that in a conflict situation, the leaders of medical institutionsare characterized by an authoritarian style that does not involve collective nature andany objections from employees (for doctors – 69,2%, nurses – 28,4%); the subordinatebehaviour style is the most typical for deputy managers (doctors – 30,6%, nurses – 60,2%),and aggressive style(16,4%) is observed among nurse managers.Conclusion. It has been established that the management style of the head of a medicalorganization is a purely individual phenomenon, which is determined by the specificcharacteristics of a concrete individual, reflects work peculiarities with colleagues andpatients, as well as the decision- making technology of this individual.
ROLE OF INULIN IN NONALCOHOLIC FATTY LIVER DISEASE TREATMENT AND CHANGES OFTHE GUT MICROBIOME
Authors: Kvit K.B. , Kharchenko N.V.
Published: March 2023

Bacterial translocation and endotoxemia due to dysbiosis and increased intestinalpermeability have been proposed as the possible mechanism that provokes developmentand progression of nonalcoholic fatty liver disease (NAFLD). Microbiome variationscould lead to positive and negative effect due to the impact on different links of theNAFLD pathogenesis – from biochemical markers to the fat accumulation in the liver.Therefore, looking for thetherapy that could effectively influence on the liver steatosisprevention has become a topic research during recent years.Objective – to study the gut microbiome composition and biochemical markers in patientswith nonalcoholic fatty liver disease before and after inulin treatment.Materials and methods. The study design included 93 patients with NAFLD who weregiven 5 g of Inulin- Neo (Sunchoke extract) twice daily. NAFLD diagnosis was basedon the ultrasound and liver elastography examination. The gut microbiome beforeand after treatment was determined by the real-time PCR methodology and includedthe Bacteroidetes, Firmicutes, Actinobacteria measurement, as well as the qualitativedetermination of Candida albicans, Candida glabrata and Candida krusei. The durationof treatment was 20 days. Results. There were Actinobacteria and Firmicutes growth in gut microbiome,improvement of biochemical indicators (gamma glutamyltransferase (GGT), triglycerides(TG), high density lipoproteins (HDL), high-sensitive CRP (hs- CRP)) after the Inulintreatment. Also, a negative correlational relationship was marked between the level ofActinobacteria and intestinal Candidosis after the Inulin therapy.Conclusions. Inulin can be a part of therapy in patients with NAFLD due to its positiveeffect on the biochemical indicators of steatosis and by gut microbiome modulation,which affects the reduction of pro-inflammatory markers and the endotoxemia level.
THE ROLE OF IMMUNOTHERAPY IN THE PREVENTION OF THE SPECIAL TREATMENT COMPLICATIONS’ DEVELOPMENT OF THE PATIENTS WITH THE ORAL CAVITY CANCER
Authors: Hirna H.A. , Rozhko M.M. , Kostyshyn I.D. , Tkach V.Ye. , Levandovskyі R.A. , Maltsev D.V.
Published: March 2023

The article presents data concerning effectiveness of the immune agent alpha/betadefensins as a accompanying chemotherapy/radiotherapy drug at the 1st stage oftreatment of 73 patients with cancer of the oral cavity and oropharynx.The purpose of the work – to evaluate the effectiveness of the immune agent alpha/betadefensins as a drug, accompanying radiation or chemoradiation therapy, at the 1st stageof treatment of patients with the oral cavity and oropharynx cancer.Materials and methods. Patients of the I and II groups under study received radiation andchemoradiation therapy, respectively, as well as the immune agent alpha/beta defensins2.0 ml 2 times a day intramuscularly 2 days before the start of the special treatment for5 days, as well as during the next 10 days of treatment 1 time per day. Patients of III-IVgroups, comparative, received similar treatment, but without immunotherapy.The results. According to the time of the appearance of epitheliitis and changes in itsdegree in the dynamics of treatment, the best results were obtained in patients of groupI, since the first inflammation manifestations in the oral cavity or oropharynx developedat the latest – at a dose of 22 Gy, while in patients of group III they appeared at a dose of12 Gy (p<0.05) and in larger quantity of patients (12%). The transition of the first degreeof epitheliitis to II and III in the first group took place in a smaller number of patients,that indicates a positive effect of the immunopreparation on the severity of epitheliitis.The number of cases of epitheliitis of the III degree is indicative: 4% of patients of theI group against 79% of patients of the III group and 60% of patients of the IV on averageafter 30 Gy (p<0.05). Only in the IV group there were patients who developed ulcerativeepitheliitis (IV degree). The number of patients with radiodermatitis of the I degree in theI group was 30% less compared to the III group, in the II group – 29% less than in groupIV. Radiodermatitis of the II degree was observed in a small number of patients – 5% inthe II group and 11% in the III group Xerostomia occurred in 90% of patients regardlessof the method of treatment and the use of immunotherapy as accompanying drug ofspecial treatment. Paraheusia and ageusia are more pronounced in groups III and IV.Conclusions. The phenomena of radiation epitheliitis develop later in the treatmentperiod and in a smaller number of patients, who received alpha/beta defensinimmunotherapy compared to patients, who did not receive immunotherapy. A positiveeffect of immunotherapy can also be considered a decrease in the number of patients withIII-IV degrees of epitheliitis.
IMPLEMENTATION OF CURRENT RECOMMENDATIONS FOR PULMONARY EMBOLISM THERAPY UNDER CONDITIONS OF ANTIPHOSPHOLIPID SYNDROME AND ECG DIGITALIZATION TO DIFFERENTIATE THIS PATHOLOGY AND ACUTE CORONARY SYNDROME (OBSERVATION FROM PRACTICE)
Authors: Tashchuk V.K. , Malinevska- Biliichuk O.V. , Ivanchuk P.R. , Onofreichuk D.I. , Dubinska M.V.
Published: March 2023

The work highlights the principles of a new approach to the management of patientswith pulmonary embolism against the background of antiphospholipid syndrome, takinginto account modern recommendations and the clinical case analysis. The expediencyof ECG digitalization using software- diagnostic complex «Smart ECG» at pulmonaryembolism, combined with antiphospholipid syndrome, to make differential diagnostics ofacute coronary syndrome, is substantiated.
Методика отримання біопластику з кутикулярних покривів комах
Authors: Гуца Олександра , Мірутенко Владислав
Published: March 2023

Сьогодніоднією з найбільших екологічних проблем людства є забруднення навколишнього середовища пластиковимивідходами. Причиною є те, що поліетилен стійкий до біологічної деструкції в природних умовах, а це у своючергу спричинює накопичення виробів із пластмас у навколишньому середовищі. З метою зменшення об’ємупластикових відходів, що накопичуються у навколишньому середовищі, ми вдосконалили методикуотримання хітозану з кутикулярних покривів твердокрилих з подальшим виготовленням біопластику.Пропонований метод може стати альтернативним при виробництві полімерних виробів зі складнимиформами та встановлює хітозан, як життєздатний біопластик, який потенційно може бутивикористаний замість існуючих нерозкладаних пластмас для комерційного виробництва. Процесвиготовлення біопластику з жуків складається з чотирьох стадій: демінералізація, депротеїнізація,деацетилювання, пластифікація. В якості сировини ми використовували колорадських жуків.Демінералізацію попередньо висушеного і подрібненого матеріалу проводили додаванням концентрованоїазотної кислоти з подальшим нагріванням. Після цього промиту і висушену сировину в процесідепротеїнізації обробляли гідрооксидом натрію, в результаті чого отримали чистий хітин. Для отриманняхітозану провели деацетилювання отриманого хітину 50% гідроксидом натрію з нагріванням суміші. Наостанньому етапі хітозан розчиняють розчином оцтової кислоти з подальшим висушуванням.
Digital transformation of business during the Fourth Industrial Revolution
Authors: Khabarov V. I. , Lukashin K. V.
Published: March 2023

The introduction of innovative technologies, optimization of output and fundamental changes in the industrial sphere force manufacturing enterprises to find the latest sources of development and increase productivity. It is necessary to transform business processes, change the value chain and change competitive, innovative and operational strategies for business development, which will significantly accelerate the development and implementation of innovative technologies.This paper analyzes the relations formed as a result of the creation and implementation of technological innovations, the definition of innovative behavior of manufacturing companies according to the concept of Industry 4.0.
The renewed helicopter fleet is the key factor in the social and economic development of the regions
Authors: Krivolutsky Yu. V. , Krivolutsky E. Yu.
Published: March 2023

Helicopters are the main transport in the North, Siberia, and Far East regions. The social and economic development of the regions is mostly defined by the condition and development of the helicopters’ fleet. Also, it is defined by the density and productiveness of the work of helicopter aviation companies with the customers. The ability of aviation companies to buy new types of helicopters on the one hand, and the ability of current and potential customers to order transportation services on the other hand, will define the scope and the speed of development of production and social domain of the regions.
Notes on the Origin and Pedigree ofSalix‘The Hague'
Authors: Marchenko Alexander M. , Kuzovkina Yulia A.
Published: March 2023

Salix ‘The Hague' is an ornamental willow, which was selected by the Dutch horticulturist S.G.A. Doorenbos before World War II. It provides early spring floral interest by the way of its large catkins. Salix ‘The Hague' was first described and listed in many references as a hybrid between S. caprea × S. gracilistyla. However, a recently analyzed description by Belder noted that it was a hybrid of S. × erdingeri × S. gracilistyla. A study was conducted to review the original herbarium specimens and to verify the pedigree of S. ‘The Hague' using the ovule number methodology. The analyses asserted that S. ‘The Hague' was rather a hybrid between S. × erdingeri and S. gracilistyla and should be reclassified in horticultural references. This study also confirmed that there were different genotypes cultivated under the name S. ‘The Hague'.

Species used in this study: The Hague willow (Salix ‘The Hague'), Goat willow (S. caprea L.), Violet willow (S. daphnoides Vill.), S. ×erdingeri, Rose-gold pussy willow (S. gracilistyla Miq.).
Notas de apoyo. Curso de confiabilidad estructural
Authors: Gómez Soberón María de la Consolación
Published: March 2023

En el análisis y diseño de las estructuras hay muchas incertidumbres inherentes. Variable como la carga externa o la capacidad y resistencia de los elementos estructurales, y de la estructura misma, deben ser consideradas como variables aleatorias con incertidumbre. Esto es, en el momento del diseño de la estructura no se sabe con precisión los valores como la velocidad máxima del viento, la aceleración del terreno o el esfuerzo de fluencia del acero. Cuando, por ejemplo, se analiza y diseña un puente es necesario definir la carga viva de diseño, pero ¿de qué depende la magnitud de dicha carga en un momento dado?, ¿cuál es el valor preciso que se considerará?, etcétera. No es posible contestar de manera precisa estas preguntas. De esta forma, cuando se diseña un sistema estructural no es posible lograr la condición de probabilidad de falla nula, no hay control completo de todas las variables. Por lo tanto, se debe diseñar al sistema para que dicha probabilidad de falla sea finita y controlada para predecir adecuadamente su comportamiento. Así, las estructuras se deben diseñar para un determinado nivel de seguridad que, obviamente, conlleva un determinado riesgo. Por ejemplo, en las NTC (Normas Técnicas Complementarias) del RCDF (Reglamento de Construcciones del Distrito Federal, RCDF 2004) se definen los estados límite de servicio y seguridad a través de restricciones en los desplazamientos de entrepiso, resistencias mínimas, etcétera. Muchos de estos valores fueron definidos considerando las diferentes incertidumbres, formando criterios de diseño basados en confiabilidad. La estimación de la influencia de las incertidumbres presentes en el diseño de una estructura proporciona información adicional sobre la seguridad de ésta. De esta forma, si al analizar un edificio se determina el desplazamiento máximo que tendrá ante una determinada carga, cuando se obtiene su confiabilidad se puede indicar cuál es la probabilidad que este desplazamiento supere cierto límite. La estimación de la confiabilidad estructural complementa la información que tenemos sobre el comportamiento del sistema, por lo que ayuda a tomar mejores decisiones sobre sus procesos de análisis y diseño.
Evaluación de la actividad electrocatalítica de nanoestructuras base paladio soportadas en óxido de grafeno, para la electrooxidación de ácido fórmico
Authors:   , Medina Rojano Víctor Alberto
Published: March 2023

This research evaluated the electrocatalytic activity of palladium-based nanostructures supported on graphene oxide, GO, for the formic acid (FAER) and methanol electro-oxidation reactions (MER), both of which are relevant to applications in fuel cells (FCs). The latter is a sustainable alternative for, clean energy generation, efficient, dependable at usually greater efficiencies (40-70%) compared with internal combustion fossil fuel burning engines. Presently, such electrochemical devices have gained significant attention almost worldwide as can be gathered from numerous research reports and papers, which indicate that considerable financing and infrastructure have been dedicated, although large fractions of them are devoted to development and testing of the electrocatalysts that are the core of the electrochemical devices serving widespread energy-consuming clientele. Naturally, the FCs will need to warrant prolonged service times at the lowest cost possible. Innovation in this field of science and engineering addresses the synthesis of nanometric materials capable of impelling the electrochemical reactions that sustain the fundamental redox reactions on which this technology rests. This investigation focused on the nanomaterial synthesis through the impregnation and combustion methods, using Pd and another transition metal, as in 10% Pd and 10% M, where the capital letter refers to the metal used (Co, Cu or Rh). The proportions used to form the electrocatalysts were 20% alloyed nanoparticles, and 80% GO as support material. Controlling the amounts of metals precursor and reducing agent aided in the electrocatalytic activity evaluation of FAER and MER, through the steadystate current density. PdCu/GO, and PdCo/GO nanostructures in 1:1 ratio that were synthesized with combustion method exhibited the largest electrocatalytic activity for FAER and MER respect to the other synthesized
Recuperación electroquímica de metales a partir de baterías de iones de litio de desecho empleando como medio lixiviante Disolventes Eutécticos Profundos (DES)
Authors:   , Aerthon Sampayo Alan
Published: March 2023

El presente trabajo se centra en el desarrollo de un proceso de reciclaje respetuoso con el medio ambiente para la recuperación de cobalto como producto de valor agregado a partir de las baterías de iones de litio (LiBs) gastadas con un disolvente eutéctico profundo, DES, formado por cloruro de colina y urea también llamado reline. El DES realiza la función de ser un medio lixiviante selectivo para extraer iones de Co (II) del LiCoO₂ proveniente de los polvos catódicos, obteniendo el Co metálico en fase solida sobre un electrodo de carbono vitreo. Además, se determinaron los parámetros cinéticos y termodinámicos del proceso de nucleación y crecimiento de los cúmulos metálicos de cobalto sobre carbono vítreo mediante modelos que involucran la nucleación 3D y el crecimiento controlado por difusión. Finalmente, se llevó a cabo la caracterización de los depósitos formados, mediante microscopia electrónica de barrido, espectroscopia dispersiva de rayos X y espectroscopía de fotoelectrones emitidos por Rayos X.
Evaluación de la corrosión en aceros AISI 1018 y 8620 en medios ácidos utilizando inhibidores orgánicos de la corrosión
Authors:   , Barrón Vázquez Salvador
Published: March 2023

In this work, the inhibitory effect of the ampicillin, cephalexin, cefotaxime and ceftriaxone drugs on low carbon steels AISI 1018 and AISI 8620 in corrosive media 0.5 M HCl, 0.5 M H₂SO₄ and 0.5 M HClO₄ was investigated. Polished specimens of these steels were prepared, which were then exposed to corrosive media, in the absence and presence of inhibitors, and their behavior against corrosion was analyzed through the techniques of Tafel curves and electrochemical impedance spectroscopy (EIS) in addition to a measurement of weight loss over 24 hours. The results obtained showed that the performance of the drugs, expressed in percentage values of inhibition efficiency, %EI, at the maximum concentration (400 ppm) of inhibitor for steel 1018 in 0.5 M HCl were 86%, 90%, 87% and 88%, for ampicillin, cephalexin, cefotaxime, and ceftriaxone, respectively; in 0.5 M H₂SO₄, 42%, 70%, 74% and 89% were obtained following the same order; and finally for the 0.5M HClO₄ medium, the efficiency percentages obtained were 58%, 53%, 72% and 78%, respectively. In the case of 8620 steel, the %EI values obtained were 84%, 84%, 87% and 82% in 0.5 M HCl; 43%, 67%, 84% and 91% in 0.5 M H₂SO₄ and finally 51%, 73%, 75% and 70% in 0.5 M HClO₄ for ampicillin, cephalexin, cefotaxime and ceftriaxone, respectively.
Vidrios de Zn₃(PO₄)₂ co-dopados con Er³⁺ - Yb³⁺ para un amplificador de señal
Authors:   , Flores Rivera Frida Lissete
Published: March 2023

Se presenta la simulación computacional y síntesis real de vidrios de fosfato de zinc dopados con 𝐸𝑟³⁺−𝑌𝑏³⁺ para su aplicación como amplificadores de señal a la longitud de onda de 1550 nm. Los amplificadores ópticos realizan un papel muy importante en las redes de larga distancia, el elemento erbio como dopante en las redes de comunicación ha sido de gran interés debido a sus excelentes características de amplificación y a su amplia banda espectral. Por otro lado, el elemento iterbio debido a su buena eficiencia ha sido de los más utilizados como medio de ganancia y obtención de alta potencia. En este trabajo se propone la síntesis de vidrios de fosfato de zinc a diferentes concentraciones de Erbio e iterbio basándonos en un previo tratamiento matemático tomando como herramienta de simulación el software Matlab que nos acerca a los parámetros de concentración y volumen ideales en la síntesis de los vidrios a fin de obtener una ganancia óptima. Los resultados teóricos muestran que al incrementar la concentración del ion iterbio en el sistema de co-dopaje 𝐸𝑟³⁺−𝑌𝑏³⁺, la ganancia y potencia de salida tienen un aumento considerable, de manera similar, pero reduciendo la concentración del ion erbio en el sistema co-dopado, se logra el objetivo de aumentar la ganancia ya que la mayor concentración del ion erbio reduce la eficiencia de transferencia de energía. Los resultados experimentales muestran que con una alta concentración del ion iterbio y una baja concentración del ion erbio, se logra obtener una ganancia óptima, pero si estas concentraciones se dopan en una matriz de fosfato de zinc con sodio, se presentará una mayor ganancia y potencia de salida del amplificador. La principal contribución de este proyecto es la comparación de la simulación matemática con la caracterización experimental de los vidrios sintetizados además de la fabricación y análisis de vidrios de fosfato de zinc con sodio. Esto nos lleva a conclusiones más completas en la búsqueda de una matriz vítrea que permita amplificar una señal de comunicaciones y analizar su máxima ganancia.
Síntesis de Mg-MOF-74 y Cu-MOF-74 para la separación de compuestos aromáticos simples
Authors:   , Pacheco Hernández Helmy
Published: March 2023

Las redes metal-orgánicas o MOF por sus siglas en inglés (metal-organic frameworks) son materiales cristalinos y porosos constituidos por dos componentes principales i) ligantes orgánicos y ii) centros metálicos. Estos materiales versátiles han sido objeto de estudio durante la última década debido a sus amplias aplicaciones en el campo de la adsorción de gases, catálisis, separación de compuestos, entre otras. Por otro lado, los procesos de separación en la industria petroquímica son indispensables para el aprovechamiento de los hidrocarburos provenientes del crudo de petróleo. En la actualidad como procesos de separación a nivel industrial se utilizan técnicas de destilación con altas temperaturas y presiones que conllevan gran consumo energético. Debido a lo mencionado anteriormente, en el presente trabajo, se propone una alternativa para la separación de hidrocarburos aromáticos simples C6 (benceno), C7 (tolueno) y C8 (o-, m-, p-xileno) a presión atmosférica y temperatura ambiente, mediante el uso de un material con alta porosidad, en este caso las Mg-MOF-74 y Cu-MOF-74. Se propone la síntesis de los materiales de manera experimental y el estudio de las interacciones entre las Mg-MOF-74, Cu-MOF-74 y los hidrocarburos aromáticos simples se llevó a cabo empleando un software especializado llamado Quantum Espresso.
Caracterización de vibraciones mecánicas de un cristal fonónico circular
Authors:   , Martínez Solís Ezequiel
Published: March 2023

The present work consists of the numerical design of a one-dimensional circular phononic crystal in 1100 aluminum. The final shape of the design is a ring consisting of eight internal teeth, similar to an automotive mechanical gear with internal teeth. Each of these teeth performs the role of an atom or a molecule, between one tooth and another a connector is designed that links the teeth to form a cell. An eigenfrequency analysis was done using COMSOL Multiphysics software studying more than 40 different designs. A system was found that presents connectors capable of forming bands and gaps in the spectrum of the periodic structure and its vibration modes were found. The four families of modes that appear in these serrated rings are: in-plane flexional, compressional, torsional, and out-of-plane flexional modes. This design presents a structure of phononic bands of allowed and prohibited frequencies, mainly in the flexional modes in the plane and in the torsional modes. The analytical solutions of the wave equations that best showed the emergence of the allowed and prohibited bands (flexional waves in the plane and torsional waves) for the uniform system are also presented. We reproduce the analytical expressions with which theoretical calculations were made for this type of waves. The calculations carried out for this type of waves presented a percentage error between the theoretical and numerical of 4.90% and 0.94 %, on average, respectively.
Electrodeposición de una aleación Zn-Co en acero de bajo carbono mediante un disolvente eutéctico profundo para su estudio y aplicación como inhibidor de la corrosión
Authors:   , Ramírez Santander William Miguel
Published: March 2023

The purpose of this research project was to study the nucleation and growth mechanism of Zn-Co alloy electrodeposited on glassy carbon in the (reline) ChCl-Urea deep eutectic solvent, as well as its ability to inhibit the corrosion of AISI / SAE 1018 steel in a saline medium. Electrodeposit studies onto glassy carbon and 1018 steel were carried out using voltammetry and chronoamperometry techniques applying various potential steps. It was determined that the electrodeposition of the Zn-Co alloy onto the vitreous carbon is carried out by instantaneous nucleation with three-dimensional growth controlled by diffusion and that simultaneously with this process there is a reduction of the residual water present in the DES on the nuclei of the alloy formed. The kinetic constants that describe the electrodeposition process such as nucleation rate (A), number density of active sites (No) and water reduction rate constant (KWR) were determined using nucleation and growth theoretical models. The characterization of the bimetallic deposits was carried out by SEM and EDS showing branched and granular morphologies for glassy carbon and 1018 steel, respectively. In addition, alloys with high cobalt contents were obtained due to the fact that there is no anomalous co-deposition as occurs in an aqueous medium. The coatings of Zn and Zn-Co on 1018 steel obtained potentiostatically at -1.25 V and different contents of Co(II) in DES were homogeneous, adherent and covered the entire surface of the electrode. The corrosion tests were carried out using the techniques of potentiodynamic polarization curves and electrochemical impedance spectroscopy in a saline medium. It was found that the Zn and Zn-Co coatings protected the 1018 steel from corrosion by cathodic protection, in addition, the corrosion products formed were responsible for passivating the surface of the sample avoiding the rapid deterioration of the coating. The corrosion inhibition capacity increases with the cobalt content in the coatings and to a lesser extent with the electrodeposition time. The Zn-Co coating obtained at a concentration in the bath of ZnCl₂ 0.15 M + CoCl₂ 20 mM and a deposit time of 130 min presented the best behavior against corrosion with an inhibition of 98.18% that is higher than that granted by the Zn coatings (88.89%), Also, its anticorrosive properties depend on the phases of its microstructure, the electrodeposition parameters and the morphology of the corrosion products.
Migración y ciudad. Lo otro dentro de lo nuestro
Authors: Amoroso Boelcke Nicolás
Published: March 2023

Received with an idea, to colonize the country, promoted by their own leaders. The premise was to change the balance, suppress or replace the original peoples. Those leaders did everything possible to exterminate them, without success so far. The newcomers were Europeans, meaning white people. That dogma is present in all current right-wing movements, they feel the same terror that, at that time, the children of Spaniards felt. They ended up breaking up with their parents or the “mother country”, Spain. They had grown up for generations on Argentine soil, they felt different from their ancestors. They wanted to make their own country, in their own way Something did not work out for them with the population project, they expected Central Europeans, they dreamed dreamt with Germans, French and, if possible, some English people. The migratory flood brought the poor from Europe. They came mainly from Italy and Spain. If any came from the dream nations, they were peasants without the culture that the ruling class dreamt. They were almost illiterate. They were admitted after quarantine in the immigrant new home. They were to spread throughout the country to purify the blood. They disobeyed, they settled in the area of Buenos Aires. This is how that admired city developed.
The fraction of inspired oxygen does not affect the time to extubation in mechanically ventilated, sevoflurane-anesthetized green sea turtles (Chelonia mydas)
Authors: Justo André A. , Dutra Gustavo H. P. , Carregaro Adriano B. , Cortopassi Silvia R. G.
Published: March 2023

OBJECTIVE

To evaluate the effects of providing 100% O2, compared with the provision of 21% O2 (equivalent to room air), in mechanically ventilated, sevoflurane-anesthetized green sea turtles (Chelonia mydas).

ANIMALS

Eleven juvenile green sea turtles.

PROCEDURES

In a randomized, blinded, cross-over study (1-week interval between treatments), turtles were anesthetized with propofol (5 mg/kg, IV), orotracheally intubated, mechanically ventilated with 3.5% sevoflurane diluted in 100% O2 or 21% O2 for 90 minutes. Sevoflurane delivery immediately ceased and animals remained under mechanical ventilation with the assigned fraction of inspired oxygen until extubation. Recovery times, cardiorespiratory variables, venous blood gases, and lactate values were evaluated.

RESULTS

Cloacal temperature, heart rate, end-tidal partial pressure of carbon dioxide, and blood gases were unremarkable between treatments. The SpO2 was higher with the provision of 100% O2 than 21% O2 during both anesthesia and recovery (P < .01). Time to bite the bite block was longer in 100% O2 (51 [39–58] minutes) than in 21% O2 (44 [31–53] minutes; P = .03), while time to first muscle movement, attempt to extubate, and extubation were comparable between treatments.

CLINICAL RELEVANCE

Blood oxygenation appears to be lower during sevoflurane anesthesia in room air than in 100% O2, though both fractions of inspired oxygen were able to supply the aerobic metabolism of turtles based on acid-base profiles. In relation to room air, the provision of 100% O2 did not produce meaningful effects on the time to recovery in mechanically ventilated green turtles submitted to sevoflurane anesthesia.
Changes to the Finnish CFC Regime: What Were the Effects?**
Authors: Tokola Antti
Published: March 2023

This article examines whether the Finnish controlled foreign corporation (CFC) regime fulfills its aim to effectively prevent the shifting of profit to foreign low-tax entities and what the effects of the most recent legal amendment were. In addition, the article addresses whether the Finnish CFC regime actualizes the principles of a good tax system.
Reorganizing Students Acces in University Politehnica of Bucharest Campus and Influences on Car Traffic Externalities
Authors: Stere Șerban , Roşca Eugen , Roşca Mircea , Ruscă Florin
Published: March 2023

Transport activities are regarded as one of the greatest contributors to greenhouse gas (GHG) emissions. Even though in other economic sectors the trend is to reduce the greenhouse emissions, the transportation field has been facing a continuous growth with negative effects on the environment. Due to its harmful potential for the inhabitants of large urban areas, a special attention is required as the land use individualities, transport network features and both spatial and temporal distribution of human activities often leads to traffic congestion. Universities represent an important pole of attraction because of their role as centers of teaching, research and employment and the mobility generated by them must be taken into account. This research aimed to both develop an analysis of greenhouse emissions in urban congested areas and present the influence of a new pedestrian bridge between University Politehnica of Bucharest campus and student dormitories. An economic analysis is conducted to emphasize that the new construction will lead to benefits in terms of the reduction of travel time, vehicle operating costs, the level of greenhouse gas emissions, etc.
The Bureaucratic Competency: A Source of Power? An Exploration of International Organizations Staff Through the Notion of Competency in Organizational Sociology
Authors: Dairon Emilie
Published: March 2023

Bureaucratic competency arises from an approach combining a concept from organizational sociology (functional competency by Crozier) and a research in political science on individual competency in international organization (IO). The article shows that IO agents must master areas of uncertainty inherent in the career in IOs. To deal with this, they develop a multi-form bureaucratic skill. The analysis of this competency reveals individual strategies, far from a vision of competency as a collective resource for IOs.
Social Boundary Work in International Organizations: Taxonomy and Resistance
Authors: Guilbaud Auriane
Published: March 2023

This article – based on the case studies of the WHO and the FAO – shows that the expansion of cooperation between international organizations (IOs) and non-state actors (NSAs) leads to a significant rearrangement of IOs organizational boundaries. IOs develop bureaucratic procedures (e. g. due diligence, risk management) that lead IO employees to be in charge of “taxonomy work”, i. e. the classification and hierarchization of NSAs. This work re draws the boundaries of IOs and generates resistance and contestation, both inside and out side IOs.
Social Support, Gender and the Roots of Political Efficacy: Evidence from the Swiss Household Panel
Authors: Lindholm Annika
Published: March 2023

This study explores how social support, defined as the number and quality of close relationships, affects feelings of political influence. Using Swiss Household Panel data (1999–2018), it reveals that the quality of relationships (emotional support) enjoyed from weak ties drives women’s political efficacy, while having no significant effect for men. In addition to extending on the socially oriented drivers of political engagement, social support has the potential to reduce female disadvantage in political efficacy and eventually alleviate gen der inequality in politics.
Intimate Partner Violence and the Complexity Turn. The Multiple Conceptions of Gender in IPV Policy in Switzerland
Authors: Delage Pauline , Roca i Escoda Marta
Published: March 2023

Based on socio-historical research of domestic violence treatment in the cantons of Vaud and Geneva, this article analyses how the co-presence of many actors and approaches has affected the definition of intimate partner violence (IPV) in Switzerland. IPV policies centred on gender and then reframed to define violence as a complex issue. We show what the consequences of framing complexity for policy are.
The Temporality of Solidarities. Family and Friend Support’s Variability in Regard to Young People’s Economic Vulnerability Degree in Switzerland
Authors: Jacot Cédric , Curty Gaël , Coste Tristan , Plomb Fabrice
Published: March 2023

Based on an original survey on 1500 young people aged from 18 to 29 years old, this article aims to better understand the influence of economic vulnerability on family and peers’ solidarity. By considering two types of support (practical and financial supports), our results show that for economically vulnerable young people the support provided by family and peers is more durable and more intimately related to basic needs fulfilment.
Utilizing Voip Packet Header’s Fields to Save the Bandwidth
Authors: Abualhaj Mosleh M. , Abu-Shareha Ahmad A. , Al-Khatib Sumaya N.
Published: March 2023

Voice over IP (VoIP) is widely utilized by organizations, schools, colleges, and so on. Nevertheless, VoIP numerous challenges that hinder its spread. One of the significant challenges is the poor exploit of the VoIP technology network bandwidth (BW), caused by the huge preamble of the VoIP packet. This paper suggests a novel methodology to manage this huge preamble overhead challenge. The proposed methodology is named runt payload VoIP packet (RPV). The core principle of the RPV methodology is to reemploy and exploit the VoIP packet preamble’s data (fields) that are superfluous by VoIP technology, especially for unicast IP voice calls. Generally, those fields will be used to convey the VoIP packet payload. Consequently, diminish or zero the length of the payload and, therefore, spare the BW. The results of the investigation into the suggested RPV methodology indicated significant enhancement in the BW exploitation of VoIP technology. For instance, the saved BW in the examined environment with the LPC codec came to up to 25.9%.
Business Plan Pemanfaatan Sampah Plastik Menjadi Bahan Bakar Minyak Sebagai Implementasi Social Entrepreneurship di Pulau Harapan
Authors: Ramanda Sesiyola , Dewiyani Leola
Published: March 2023

Saat ini pesisir Teluk Jakarta telah berkembang menjadi kawasan multifungsi yakni sebagai kawasan pariwisata, perikanan, industri, perdagangan, hingga pelabuhan internasional yang memiliki frekuensi transportasi perkapalan tinggi. Kondisi ini berujung pada pembuangan limbah hasil kegiatan seluruh warga Jakarta dan sekitarnya melalui sungai-sungai yang mengelilinginya. Tiga sungai besar yaitu Sungai Angke, Sungai Sunter, dan Sungai Ciliwung telah lama dikenal sebagai pembawa limbah ke Teluk Jakarta. Hal ini menyebabkan mayoritas warga lokal yang berprofesi sebagai nelayan khususnya di Pulau Harapan mengalami penurunan penangkapan ikan setiap harinya. Maka dibutuhkan perancangan bisnis melalui implementasi social entrepreneurship yaitu bisnis BBM Plastik. Teknik pengumpulan data meliputi wawancara dan observasi. Pengolahan data dilakukan perhitungan aspek organisasi dan manajemen, aspek biaya, aspek produksi, serta dilakukan analisis ekonomi berupa perhitungan R/C Rasio, ROI, Payback Periode, Keuntungan, serta BEP. Didapatkan hasil bahwa bisnis BBM Plastik menguntungkan dengan hasil R/C sebesar 4,17, menetapkan harga jual yang lebih rendah yaitu Rp. 6000/liter dengan keuntungan Rp. 146.983.600,-/tahun dengan memproduksi 100 liter solar/harinya dan pengembalian modal selama 0,09 tahun.