bluuebunny/crossref_metadata_2025 huggingface dataset:
Anti-inflammatory effects of n-3 polyunsaturated fatty acids in THP-1 macrophages: promising in-vitro insights
Authors: Hinai Hamed Al , Hooper Sam , Potter Steve , Alawi Sulaiman Amur Al , Shuhoumi Mohammed Al , Anna Dorel
Published: August 2023

Objectives
Uncontrolled inflammation is a one route to the pathogenesis and development of inflammatory diseases. The scientific literature has reported many evidences supporting the notion that polyunsaturated fatty acids (PUFAs) belonging to the family of n-3 including docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), have an anti-inflammatory function. Although much has been learned about EPA and DHA, so many questions remain unanswered, including the differential effects on health of DHA and EPA as well as the dose-response effect on clinical outcomes. The present study is aimed to investigate the effect of the PUFAs; EPA and DHA in the inflammatory responses in LPS-stimulated THP-1 macrophages.
Methods
Cells were incubated for 24 and 48 hours with EPA and DHA. Cell viability test were used to determine the viability of cells during and after incubation. Doses concentrations of 0.09 and 0.45 mM for both EPA and DHA were utilized to study the expression levels of inflammatory cytokines that were measured by ELISA test. All data were presented as SEM and subjected to normality test by Anderson and Pearson tests and the statistical significance difference was determined via one-way ANOVA test.
Results
Our study revealed interesting findings that are in a significant agreement to other studies in the literature. DHA illustrated a decrease on the levels of IL-6 in LPS-stimulated THP-1 cells treated with 0.09 mM, and a greater reduction with 0.45 mM DHA concentration (P<0.001). Moreover, DHA in our study, achieved no statistically significant difference in TNF-alpha inflammatory cytokines compared to cells alone (P<0.001). On the other hand, LPS-stimulated THP-1 cells, when subjected to EPA, it showed a significant decline in both IL-6 and TNF-alpha in the higher dose only and failed to express a statistically significant difference in 0.09 mM (P<0.001).
Conclusion
In conclusion, our data support the notion that PUFAs represented in EPA and DHA, are capable to reduce the expression of inflammatory cytokines. DHA stands out as a more potent anti-inflammatory agent which is a suggestive for a valuable marker to fight chronic diseases. Both in-vivo animals and human trials are urgently demanded to validate our current data.
Investigation of Crumb Rubber Modification on the Performance of Bitumen and Asphalt Mixtures
Authors: Haroon Waqas , Ahmad Naveed
Published: August 2023

The performance of flexible pavements is greatly influenced by rutting, fatigue, and durability. The limitations of traditional bitumen in flexible asphalt pavements are due to the significant rise in traffic loads and volumes. The reason for incorporating tire waste into bitumen is its incredible qualities and economical price as a bitumen modifier. The quality of crumb rubber-modified bitumen (CRMB) mainly depends on the concentration of crumb rubber (CR) dispersed into the base bitumen. The primary target of this research is to modify the bitumen with CR to improve the thermal properties, rheology, rutting resistance, fatigue resistance, and moisture-damaged performance. The three concentrations, i.e., 5%, 10%, and 15% of CR, were prepared by dispersion in conventional 60/70 penetration grade bitumen. The consistency and mixture test results concluded that the optimum dosage of CR-10% provides appropriate thermal, rheological, rut, fatigue, and moisture-damaged performance.
The Safi boulders (South of Morocco): another evidence of the 1755 Lisbon tsunami?
Authors: Khalfaoui Otmane , Joudar Imane , Chahid Nouhaila Erraj , Khalidi Khalid El , Minoubi Abdenaim , Bouchkara Mohammed , Zourarah Bendahhou
Published: August 2023

Tsunamis and storm surges are among several hazards threatening the Atlantic coast of Morocco. During the last two decades, sedimentological deposits left by these events, in the form of fine-grained sediments (washover) and boulders, have been studied along the Moroccan shores to determine the return period of these events and how they fluctuate in terms of intensity. The present work investigates two new boulder fields located along the Safi coast (south of Morocco). Field surveys were accomplished in the two areas to collect the position/elevation and dimensions of 164 boulders using a GPS/DGPS and a traditional meter, respectively. The field data was combined with hydrodynamic equations to estimate the minimum velocity and storm/tsunami wave height to move the measured boulders. In site 1, the boulders are situated on a rocky intertidal platform, while in the second, they are on the top of a cliff. For both sites, the size of the boulders ranges from 0.6 to 5.60 m, 0.54 to 3.6 m, and 0.27 to 1.5 m on the major (a), medium (b), and minor (c) axes, respectively. They reach a volume of up to 25.20 m3 and a weight of 55.44 t. The maximum distance and elevation recorded are around 41.77 m and 13 m, respectively. According to hydrodynamic equations, the coastal platform boulders (site 1) can be moved by tsunami waves with heights between 0.31 and 2.50 m, and storm waves from 1.26 to 10 m. For the cliff-top boulders (site 2), they need tsunami and storm waves with at least 7.33 and 14.33 m, respectively, to be displaced. The results from the field surveys and hydrodynamic equations suggest that both, tsunami and storm waves, are capable of moving the boulders in site 1. For the cliff top-boulders, the data favours tsunamis as a source for this deposit.
A Corte Interamericana de Direitos Humanos e a efetividade do direito à igualdade e identidade de gênero: A Opinião Consultiva nº 24
Authors: Antunes de Miranda José Alberto , Mendes Neto Layer Leorne
Published: August 2023

Este artigo analisa a Opinião Consultiva nº 24 emanada pela Corte Interamericana de Direitos Humanos (Corte IDH) em relação às pessoas pertencentes ao movimento LGBTIQ (lésbicas, gays, bissexuais, transexuais, intersex e queer). É feita uma abordagem sobre o funcionamento da Corte IDH bem como sobre os conceitos do direito à igualdade, identidade de gênero e não discriminação. O objetivo deste ensaio é demonstrar a influência que a Opinião Consultiva nº 24 da Corte IDH possui em relação ao Brasil. No caso, o Supremo Tribunal Federal (STF) entendeu ser possível a alteração de nome e gênero no assento de registro civil mesmo sem a realização de procedimento cirúrgico de redesignação de sexo. O estudo realizado é de natureza qualitativa descritiva, desenvolvido por meio de consultas documentais e bibliográficas, percorrendo as principais fontes advindas da instituição internacional envolvida nessas ações. A conclusão do ensaio é de que o STF, em um claro diálogo com a Corte IDH, harmonizou sua jurisprudência em relação à Corte Interamericana de Direitos Humanos, evitando, no ponto, qualquer responsabilidade internacional do Brasil.
A não proliferação de armas nucleares e o submarino de propulsão nuclear uma proposta de simulação
Authors: de Andrade Flôr Cláudio Rogério , covino Gitahy Paula , Araújo Carlos Alexandre , Viana Souza Guimarães Victoria , Janick Vinícius
Published: August 2023

Atualmente, somente Estados Unidos, Rússia, Reino Unido, França, China e Índia possuem submarinos com propulsão nuclear. A situação singular do Brasil, por ser o primeiro país sem armas nucleares a ter essa tecnologia e por, provavelmente, ser o primeiro país a colocar o combustível nuclear naval sob salvaguardas faz com que ele receba pressões para aderir ao Protocolo Adicional (PA) da Agência Internacional de Energia Atômica (AIEA). O artigo tem como finalidade a apresentação de um projeto preliminar de uma simulação, como ferramenta de auxílio à tomada de decisão de alto nível, a fim de fazer frente às tendências e incertezas que possam interferir com o projeto do Submarino Convencional de Propulsão Nuclear Brasileiro (SCPN). Para tal propósito, são usadas as teorias dos jogos, as de tomada de decisão, as de simulações/jogos de guerra e de análise. Foi verificado que, partindo da premissa que o SCPN será comissionado em 2029 é importante que o Brasil tenha tomado uma decisão em relação ao PA da AIEA antes desse ano e que cenários prospectivos possam ser revistos ou reformulados anualmente ou a cada dois anos para estejam atualizados, de modo a aumentar a probabilidade de se atender aos interesses brasileiros.
Digital Entrepreneurship in Russia: Development during the Pandemic
Authors: Abalakin Aleksandr , Yakovlev Andrey , Akimenko Vera , Denisova Elena
Published: August 2023

Digitalization has become inevitable as the demand for digital services increases. The purpose of the article is to study the development dynamics of Russian digital segment during and after the pandemic and to predict the vector of its long-term development. The authors provide evidence of dualism: on one hand, the pandemic led to new restrictions in the development of entrepreneurial activity; on the other hand, the change in demand and the high adaptability of business structures made it possible to expand the digital segment of Russian small and medium-sized businesses. The authors use methods of systematization, comparison, economic analysis, graphical method and systematic approach. The development of the Russian digital entrepreneurship sector in the context of digitalization of internal business processes, consumer communication processes, and external relations is analyzed. The authors conclude that digital technologies have high potential for the development of Russian small and medium-sized businesses and provide recommendations on the implementation of state policy measures aimed at optimizing the development of digital entrepreneurship in Russia.
Swedish parallels of Belarusian proverbs: Structural-semantic modeling
Authors:   Bonch-Bruevich St. Petersburg State University of Telecommunications, Alyoshin Aleksey , Ivanov Evgeny ,   Mogilev State A. Kuleshov University
Published: August 2023

The article is devoted to the identification and differentiation of Swedish parallels of the most common Belarusian proverbs according to the nature of interlingual correlation. The goal involves the use of interlingual structural-semantic modeling of proverbs to identify complete proverbial analogues in different languages, identical structural models of proverbs, identical proverbial images and concepts. The material for the study was 320 Swedish proverbs, which are interlingual correlates of Belarusian proverbs. Proverbs-analogues in the Swedish and Belarusian languages are differentiated according to the nature of the interlingual community into two typologically significant groups: universal proverbs and international proverbs. Interlingual correlates of Swedish and Belarusian proverbs, which have the same structural models, are differentiated into several typologically significant groups depending on the nature of the variability of the lexical composition, due to the difference in the conceptual and figurative plan of proverbs. As a result of the study, the authors come to the conclusion that in the Swedish language there are a significant number of proverbs that are full or partial correspondences of the most commonly used Belarusian proverbs. A comparative analysis based on the structural-semantic modeling of proverbs made it possible to differentiate Swedish and Belarusian proverbial parallels into three typologically significant groups of units: similar proverbs, proverbs with identical structural models, proverbs with identical images and concepts. Swedish proverbs containing images and concepts identical to Belarusian proverbs are characterized by partial ethnocultural marking of their content, as well as the absence of a strict connection between the correlation in the content of proverbs in different languages and the presence of identical images and concepts in proverbs. The absence of such a connection indicates the typological similarity of the figurative-conceptual spaces of the Swedish and Belarusian proverbial pictures of the world, in which manifestations of interlingual community and national specificity are deeply mutually determined.
Corpus analysis of the co-occurrence of the concept hygge
Authors:   Ludovit Stur Institute of Linguistics, Benko Vladimír , Gurova Elena ,   St. Petersburg State University, Khokhlova Maria ,   St. Petersburg State University, Krasnova Elena
Published: August 2023

The notion that a language worldview is shaped by a system of key concepts as well as ideas and motifs linking them, which are expressed in the meaning of individual lexemes and phrases, has informed a number of studies of culturally specific words and even entire semantic fields. Comparison of different language worldviews has revealed many differences, which at first sight seem insignificant but may hinder successful communication. The concept of hygge occupies a special place in the Danish language worldview and has become somewhat of a Danish hallmark. Our study uses corpus data to analyse six co-occurrence patterns of words representing the concept hygge, which allows us to explicate the implicit meaning components of the lexemes in question and to identify the most frequent patterns. The material used was the Danish Gigaword Corpus (DAGW), which includes texts collected from the Internet. The corpus covers the Danish language in all its diversity: a variety of genres and types of texts are represented in the corpus (law, social media, subtitles, debates, conversation notes, encyclopaedia articles, fiction, news, etc.). The high frequency of the words representing the concept hygge in the corpus texts once again confirms the importance of this concept for Danish culture. The combinational properties of all the models studied show a striking uniformity: all collocations are characterized by positive connotations and can be categorized into a small set of thematic groups (place, time, atmosphere, hobbies, spending time together and communicating). The above co-occurrence analysis allows us to identify the following set of characteristics of the concept hygge: a feeling of peace, tranquillity and security, enjoyment and good mood that comes from being engaged in active pursuits, presence of close, familiar people, a familiar, wellknown place, a shared time together.
The three-term model of communication and the system of Danish deictic pronouns
Authors:   Institute of Linguistics of the Russian Academy of Sciences, Nikulicheva Dina ,   Moscow State Linguistic University
Published: August 2023

The article focuses on the system of deictic pronouns in Danish. It is argued that in addition to binary oppositions expressing the objective (nearest vs distant) location of objects in the physical space relative to the speaker, like this vs that — denne vs den, a three-term opposition develops in modern Danish. This allows to specify the subjective interaction between the three participants in the communicative act: the speaker (1st person), the listener (2nd person) and the objects of the surrounding world (3rd person). The system of secondary demonstrative pronouns — deictic binomials — is investigated. “Deictic binomial” is used as a term for an analytical combination of a simple deictic pronoun and a spatial adverb. Four possible combinations of such binomials are considered. The Danish Corpus (KorpusDK) analysis made it possible to assert that combinations of proximal deixis indicators — such as denne her ‘this here’ — are subjective markers of 1st person signaling that the deictic object enters into the speaker’s personal space. Combinations of indicators of distal and proximal deixis (such as den her ‘that here’) are “cohortatives” — subjective markers of the 2nd person, signaling the common perception of shared attitude to the deictic object by the speaker and its addressee. Combinations of analytical indicators of distal deixis (such as den der ‘that there’) — shift the negatively evaluated object outside the personal space of the speaker and the space of communication, which corresponds to the communicative function of the 3rd person. The search in the Danish Corpus for the fourth type of combinations, that is, combinations of proximal and distal deixis (such as denne der ‘this there’) gives practically no results. This confirms the conclusion that the paradigm for expressing the speakers subjective attitude to the object of deixis in modern Danish is represented by three categories that correspond to three “spatial areas” — the speaker’s personal space (1st person), the common communication space shared with the addressee (2nd person), an external space into which the speaker subjectively removes the disapproved or alienated objects of deixis (3rd person).
The theme of existential loneliness in Søren Kierkegaard’s and Fyodor Dostoevsky’s works
Authors:   А. M. Gorky Institute of World Literature of the Russian Academy of Sciences, Korovin Andrey
Published: August 2023

The article deals with the topic of existential loneliness as a category of poetics, which is reflected in works of the Danish philosopher Søren Kierkegaard and Fyodor Dostoevsky’s novels. The question of typological convergences in the world view of Kierkegaard and Dostoevsky has been discussed in philosophical writings, but the question of literary interpretation of the ontological category of loneliness in books of both of writers has not be raised. Loneliness becomes one of the most important concepts for understanding the evolution of human soul (stages on life’s way) in Kierkegaard philosophy. The theme of loneliness has been developed in Romantic literature and it was one of the central problems for it, but Kierkegaard invents a new understanding of human being and uses the concept “existence” to describe it. The human loneliness in this world becomes both the subject of reflection and the subject of analysis, which displays the existential dialectics. The similar embodiment of the theme of loneliness is also the characteristic of Dostoevsky’s works, where a hero, who tries to find himself, should make his existential choice: to accept or not his own loneliness. And his further life depends on this choice: he can go to the way of spiritual rise or to death. The theme of loneliness is closely related to the concept of despair, which was introduced by Kierkegaard, because it is a human desire to be oneself. In the early Dostoevsky’s books (“The Double”, “Poor Folk”) heroes desire to avoid loneliness abandoning their own self, and it leads to tragedy. In later books, loneliness becomes a way to find oneself with different results: it can lead to the collapse of hero’s life (the man from underground, Smerdyakov, Ivan Karamazov) or to spiritual rise (Raskolnikov, the ridiculous man). Prince Myshkin could except his loneliness and save himself, but he makes a choice in favor of passion. Dostoevsky not only describes the emotional state of his lonely heroes, but he analyzes the phenomenon of loneliness the same way as Kierkegaard does it.
Modulation of struvite composition in full-scale nutrient recovery system using source-separated urine
Authors: Jang Ziya Sing-guang , Lim Kahui , Leverenz Harold
Published: August 2023

Using urine collected from a public restroom at a highway rest stop in Northern California, a full-scale nutrient recovery system involving a two-part system consisting of urine distillation followed by the precipitation of struvite crystals was characterized. The study examined the effects of different operational parameters of the coupled ammonium distillation and struvite process (CADSP) on the composition of struvite crystals and the overall nutrient recovery rates. System inputs that were investigated included the feed:steam (F:S), alkalinity source, and urinary pH. Overall, the findings demonstrate that the composition of the struvite produced can be varied by adjusting the preceding distillation unit process. Low F:S distillation operations result in high ammonium distillation rates which coincided with increased formation of magnesium potassium phosphate (MPP) while higher F:S operations led to conditions favorable to magnesium ammonium phosphate (MAP) precipitation. Therefore, low energy distillation operations (high F:S) are more conducive to MAP formation and high phosphorus recovery rates while high energy operations (Iow F:S) are more conducive to MPP formation. Sodium-based alkalinity sources should also be avoided in instances of low ammonium concentrations in the struvite precipitation tank to minimize the co-precipitation of magnesium sodium phosphate (MSP) with MPP.
Entre razões e perspectivas, caminhos e inspirações
Authors: Rodrigues Janine Marta Coelho , Rodrigues Silvestre Coelho , Tavares Aureliana da Silva
Published: August 2023

O estudo trata de uma pesquisa bibliográfica com ênfase nas discussões sobre a formação de profissionais na ótica da diversidade, a partir da perspectiva das interfaces da saúde com a educação como espaço de formação do ser humano. A reflexão permeia num olhar crítico em atuação conjunta e intercomplementar da Saúde com a Educação, viabilizando os processos de inclusão social, cultural e digital. Destacamos as atividades interdisciplinares que possuem como foco a minimização da marginalização na sociedade informatizada e que apontam também para a formação de profissionais com novos significados, novas exigências sociais. Concomitantemente, a pesquisa evidencia que a interrelação entre o ensino formativo, técnico e profissional determina a prioridade dos cursos formativos, levando em conta a ética, o rigor científico e intelectual e o enfoque multi e interdisciplinar, especialmente na área da educação e saúde.
Losartan: A Pharmacotherapy in Cardiovascular Disease
Authors: Tolou Ghamari Zahra
Published: August 2023

Background:

A recently published article confirmed that in 2019, around 523 million people suffered from cardiovascular disease (including 18.6 million deaths) worldwide. Losartan, a drug, was patented 35 years ago and approved for medical use in the United States in 1995 (28 years ago). As an effective treatment for hypertension, losartan blocks the interaction of angiotensin II with its receptor by inhibiting the renin-angiotensin system.

Objective:

This article aims to review the available literature and recent studies demonstrating the efficacy, safety, mechanism of action and drug-drug interactions of losartan in cardiovascular disease.

Methods:

This is a focused literature review with the keywords relevant to the terms performed in PubMed, Scopus and Web of Science through May 28, 2023, according to the PRISMA guidelines. Based on the PICO standard format, fifty-two relevant in-depth consequent guide approaches and evidence-based choices were selected associated with a knowledgeable collection of current, high-quality manuscripts.

Results:

After oral administration, time to reach maximum concentration is about 1-2 hours. With a 78% binding to protein, it has a bioavailability of 25-35%. Losartan is not removed by hemodialysis. For the full effect to occur, it may take up to 6 weeks. The drug is mainly prescribed for patients with high blood pressure, diabetic nephropathy, hypertension and left ventricular hypertrophy. The publication reported higher drug exposures and adverse reactions in women than men with antihypertensive medications. Losartan could improve changes in gut microbiota that might be associated with hypertension. In the high-risk group of renal transplant recipients with arterial hypertension, research reported well-controlled blood pressure with losartan monotherapy.

Conclusion:

In addition to the major losartan interactions with captopril, enalapril, lisinopril, and lithium, there are moderate interactions with aspirin, pregabalin, alprazolam, amitriptyline, baclofen, betamethasone, buspirone. Muscle cramps, respiratory infection, cough, hyperkalemia, anemia and stuffy nose are the main reported side effects. As polypharmacy could hide pharmacokinetics interaction due to cytochrome P450, therefore, the combination of losartan with drugs such as phenobarbital, rifampin or fluconazole needs vigilant attention regarding therapeutic drug monitoring.
MDCT Imaging of Volvulus Complicated with Acute Mesenteric Ischemia
Secondary to a Large Diverticulum of Jejunum in an Adult: A Case Report and
Literature Review
Authors: Lei Yan , Li Zhi-chun , Zhu Ting-ting , He Qian , Li Yong , Tang Wei
Published: August 2023

Introduction:

A large jejunal diverticulum has been reported as a possible cause of volvulus and acute mesenteric ischemia (AMI) in adults. A large diverticulum of the small bowel complicated with volvulus has been reported before in literature. However, imaging findings of a large diverticulum of the small bowel complicated with both volvulus and AMI on MDCT are rarely described and reported. In this study, we reported a case with a large diverticulum, volvulus, and AMI concurrently; these three imaging findings were reviewed and described on MDCT, and the relevant literature was briefly introduced.

Case report:

We reported the case of a 69-year-old man who presented to our hospital with acute abdominal pain and vomiting. An emergent abdominal enhanced MDCT imaging was performed and demonstrated the volvulus secondary to a large diverticulum of the jejunum complicated with AMI. Here, a case was presented that highlighted unique imaging findings on MDCT, as well as a literature review.

Conclusion:

A review of the literature revealed that a single jejunal diverticulum causing both volvulus and AMI is rare in adults. To our knowledge, a systemic description of their signs on MDCT in a case has not been reported yet.
effect of providing counseling on efforts to prevent degenerative diseases on clean and healthy living behaviors in school settings for adolescents at SMK I Sumbawa
Authors: Sholihah Nur Arifatus , Pellondou Kurnia Bend. Yunita , Handayani Asri Reni
Published: August 2023

Degenerative disease is a disease that arises due to the deterioration of organ function due to the aging process and is one of the biggest causes of death in the world, causing 60% of deaths and 40% of the global disease burden. According to the World Health Organization (WHO), nearly 17 million people are dying from degenerative diseases every year (Departemen Kesehatan RI, 2005). Efforts to increase clean and healthy living behavior in adolescents require counseling to adolescents, especially regarding various kinds of degenerative diseases and prevention efforts that must be done. The preliminary study conducted by the researcher is that out of 50 students at SMK 1 Sumbawa, it is known that 45 class XI students have never received counseling/knowledge about degenerative diseases, and 35 of them have a negative lifestyle, including often eating instant noodles, fried snacks, etc. (SMK 1 Sumbawa, 2023). The method used was pre-experimental, namely one group pretest-posttest design. This study aims to determine the effect of providing counseling on efforts to prevent degenerative diseases on clean and healthy living behavior in school settings in adolescents at SMK I Sumbawa. The location of data collection was carried out at SMK1 Sumbawa.
Espectroscopia de fotocorriente aplicada a células solares de película delgada a base de silicio amorfo hidrogenado (a-Si:H)
Authors: Valera Palacios Aníbal , Valentin Siu Marco
Published: August 2023

En este trabajo reportamos mediciones de la respuesta óptica de silicio amorfo (a-Si:H), bajo el umbral del Gap óptico, empleando el método de espectroscopia de fotocorriente. Las películas de a-Si:H fueron elaborados por medio de un sistema plasmático DC no convencional. Las medidas sugieren que la densidad de estados de este material no es muy diferente del silicio amorfo convencional. Se determinan las posiciones de las correspondientes transiciones electrónicas fotovoltaicas, existiendo una buena correspondencia con niveles internos conocidos del material.
Cálculo de la conductividad equivalente de disoluciones electrolíticas modificación de la ley de Kohlrausch
Authors: Reátegui Romero Warren
Published: August 2023

La ley de Kohlrausch para el cálculo de la conductividad equivalente para electrólitos fuertes se cumple a concentraciones sumamente diluidas (c ≈ 0), bajo estas condiciones los efectos de las interacciones moleculares se hacen despreciables y el modelo puede explicar los valores experimentales. A medida que la concentración aumenta los datos experimentales se alejan de la linealidad que la ley propone. Para explicar estas desviaciones como consecuencia del aumento de las interacciones moleculares, Theodore Shedlovsky propuso una modificación de la ley de Kohlrausch. Se ha determinado las constantes de este modelo en un ambiente Solver de Microsoft Excel para 12 electrólitos, de modo que; haciendo uso de los datos experimentales recopilados en un rango de 0-1N, estas constantes permiten generar datos y compararlos con los valores experimentales. Los resultados obtenidos muestran que este modelo predice satisfactoriamente los datos experimentales.
Modelamiento de los parámetros de funcionamiento de la Turbina Hidráulica de Flujo Cruzado aplicando el Método de Elementos Finitos
Authors: González Chávez Salomé , Cotacallapa Vera Rommmel Benjamín
Published: August 2023

Se presenta una aplicación de la Dinámica de Fluidos Computacional (CFD) empleando el Método de Elementos Finitos (FEN) para el modelamiento del comportamiento de una Turbina Hidráulica de Flujo Cruzado (Cross Flow Turbine) de 50 kW (Q = 120 l/s, H = 50 m y ω = 124.61 rad/s), en el objetivo de explicar de forma metodológica numérica, los principios y supuestos clásicos de diseño, así como la búsqueda de su optimización. Como resultados se obtienen campos de presión y velocidad para diferentes condiciones (Q = 0 - 203.61 l/s, H = 9.40 - 580.71 m y ω = 25, 50, 100 y 125 rad/s) y regímenes (laminares, de transición y turbulentos) de operación, a partir de los cuales se cuantifican algunos indicadores del funcionamiento de la turbina (distribución de los vectores velocidad en el tramo de admisión, eficiencia y coeficiente del inyector directriz, curvas características de la turbina de 50 kW y de la turbina unidad). Finalmente se proyectan parámetros de operación de la turbina para las condiciones de diseño bajo una perspectiva teórica utilizando el modelamiento de flujos.
Diseño y construcción de un aerogenerador de 500 W con imanes permanentes para pequeñas demandas eléctricas de zonas rurales
Authors: González Chávez Salomé , Baldera Teodoro José Chiroque
Published: August 2023

El presente trabajo trata del diseño, construcción y caracterización de un prototipo de aerogeneración de 500 W, utilizando tecnología nacional. Comprende el diseño y fabricación de cada uno de los componentes del sistema aerogenerador - generador de imanes permanentes, rotor eólico y elementos de dirección; así como la evaluación en campo para determinar su performance. Su aplicación se presenta como una solución energética y socioeconómica de las zonas rurales que poseen el recurso eólico, contribuyendo así a la mejora de las condiciones de vida bajo el principio de aprovechamiento del recurso local y la preservación del medio ambiente. Como resultados de las pruebas de campo se tiene, la verificación de las condiciones de diseño así como su operación de acuerdo al recurso eólico. Si bien el sistema fue dimensionado para alcanzar una potencia nominal de 500 W a una velocidad de viento de 8 m/s, en campo se ha obtenido dicha potencia a una velocidad de viento de 8,3 m/s, y un comportamiento estable en las demás condiciones.
Conversión del lenguaje de señas a voz
Authors: Del Carpio Salinas Jorge Alberto , Mescco Mizarcs Amilcar
Published: August 2023

El presente trabajo usa los métodos de procesamiento de imagen y cedes neuronales. Para clasificar los patrones del lenguaje de senas, se ha implementado en Matlab un conjunto de funciones para tal fin. Nuestro vocabulario del lenguaje de señas esta compuesto de 24 letras pertenecientes al abecedario, este trabajo considera solo aquellos gestos que no presentan movimiento, nuestro hardware son una cámara digital y una PC.
E-Business colaborativo y agentes de software.
Authors: Bernuy Alva Augusto
Published: August 2023

El artículo propone funciones para dos nuevos agentes en un ambiente colaborativo e-business. Sabemos que los procesos de colaboración están creciendo y tenemos un largo camino para trabajar en investigaciones sobre e-business. El punto de inicio es, después de identificar la colaboración entre personas, procesos y sistemas; creemos que cada proceso importante de la organización en su rutina diaria tiene dos elementos, como el contexto y el contenido unido a sí mismo. Entonces podemos entender que esos procesos son importantes cuando los miramos como el resultado de otro proceso y que puede resolver un problema. Deseamos obtener la habilidad de colaborar y apalancar el conocimiento. Hemos basado el análisis en activos intangibles unidos a la tecnología que permiten construir un diseño para entender el proceso de colaboración e-business. Presentamos los resultados del proceso y colaboración que ya existe entre ellos mismos cada vez que una tarea ha sido iniciada para obtener nuevo conocimiento. Para hacer esto nos basamos en el modelo DirCCI de colaboración de capital Intelectual, donde las necesidades del negocio y la colaboración son definidas y entonces proponemos los conceptos para diseñar y entender los elementos principales del nuevo sistema. El resultado es una nueva forma de entender la colaboración basada en agentes de software para obtener ganancia, ventaja competitiva sostenible y gestión del conocimiento en las organizaciones. Ahora deberemos pensar en cómo las personas, procesos y sistemas piensan acerca de sus decisiones virtuales a través del e-business.
Caracterización de materiales y conservación del virrey Antonio Manso de Velasco de Superunda
Authors: Petrick Casagrande Susana Margarita , Kuon Arce Rosanna Elsa
Published: August 2023

En este trabajo presentamos los primeros resultados obtenidos de la caracterización de materiales, diagnóstico e intervención del retrato de Don Antonio Manso de Velasco, Conde de Superunda, virrey del Perú en la segunda mitad del siglo XVIII, obra ejecutada por Cristóbal Lozano, renombrado pintor virreinal. Las técnicas de caracterización utilizadas fueron microscopía óptica, análisis químico a la gota, microscopía electrónica de barrido y análisis por EDX.
Elaboración y caracterización física de películas delgadas de diamante
Authors: Valera Palacios Aníbal , Ramos Edward
Published: August 2023

Este proyecto considera la elboración de películas delgadas de diamante a partir del método plasmático (glow discharge inducido) desarrollado en el Laboratorio de Óptica y Semiconductores. La correspondiente caracterización óptica y eléctrica de los materiales elaborados.
Design and implementation of a neural network in an FPGA for pattern recovery
Authors: Morales Villanueva Aurelio , Briceño Aranda Cesar
Published: August 2023

This research work shows the design and implementation in hardware based on highly complex programmable logic devices such as FPGAs, of a Hopfield artificial neural network for the recovery of stored patterns from fuzzy patterns. They were designed in artificial neural networks (basic and advanced), using FDA electronic design tools and hardware description language.
Análisis de la cavitación mediante elementos finitos y el algoritmo de Uzawa
Authors: Mantilla N. Irla , Gonzáles Ch. Salomé
Published: August 2023

Para el mejor rendimiento y mayor duración de dispositivos o elementos que participan en un sistema de transporte de energía mecánica, estos requieren de un adecuado proceso de lubricación en las zonas expuestas a fricción: cojinetes, engranajes, cilindro-pistón, etc. Este proceso es muy importante para el funcionamiento óptimo del sistema, pues, reduce costos de reparación y fallas no programadas. Uno de los problemas frecuentes de la deficiente lubricación es la generada por el fenómeno de Cavitación, por ello es importante estudiar sus efectos bajo condiciones de operación. En el presente trabajo se realiza la formulación y simulación numérica de la Cavitación en cojinetes, considerando la variación de la viscocidad del lubricante en relación con la presión y el espacio de distribución. En otros trabajos relaizados sobre este fenómeno, se menciona lo complejo que resultaría desarrollar un proceso numérico en un sustema cartesiano bidimensional, por las dificultades de no linealidad que existen en la formulación para obtener la solución explicita. Considerando algunos resultados de [1. 2 y 3], el presente estudio contribuye con la solución explicita del problema de frontera libre generado; para ello la ecuación diferencial de Reynolds y la aplicación de la ley de Barus para el efecto viscoso, se reduce a una ecuación en derivadas parciales de tipo Poison, la cual se transforma en una inecuación variacional elíptica de primera especie sobre un espacio funcional de Soboley de orden uno. Luego se construye un esquema de resolución numérica sobre un dominio bidimensional computacional, utilizando el método de Galerkin con elementos finitos y un algoritmo de Uzawa mejorado. Finalmente, se presentan los resultados que permiten simular la ubicación de la zona de Cavitación.
Diseño del control de posición de un motor DC con hardware simplificado
Authors: Butler Blacker Jorge Gustavo , Figueroa Santos Luis Leoncio , Castillo Belsuzarri Trini , Inca Rodríguez Jorge Luis
Published: August 2023

En el presente trabajo se presentan los detalles necesarios para el diseño del control de posición de un motor DC, teniendo en cuenta los parámetros del motor dados por el fabricante. Explicaremos los métodos para hallar los parámetros reales del motor, con los cuales se hallan los parámetros del controlador, además de las constantes de Kalman y de control utilizados en los programas tanto en lenguaje C++ como ensamblador del DSP que queramos utilizar, los datos de la señal de referencia, del encoder de posición, de la señal de control y de la señal de error que se pueden obtener como resultado del programa en tiempo real con lenguaje C++, dichos datos de salida se dibujan con software de Matlab. Con los datos obtenidos en tiempo real, se pueden crear los dos archivos de entrada de señal de referencia y del encoder de posición al programa en lenguaje ensamblador del DSP seleccionado, y para producir la señal de control que también es obtenida como resultado del programa en lenguaje C++, finalmente dibujamos los resultados del programa en lenguaje ensamblador de DSP seleccionado con software de Matlab.
Aplicaciones ópticas en la metrología
Authors: Valera Aníbal , Eyzaguirre Carmen , Palacios Luis , Ramos Roddy , Mosquera Luis
Published: August 2023

Un requisito básico de la Industria moderna actual; ya sea metalmecánica, electrónica o de construcción, es la precisión en su producción, dependiendo al fin y al cabo de este factor; la calidad de un producto. Constitu­yendo "La Metrología" la ciencia de la medición, presentamos en este Artículo algunas técnicas de medicio­nes ópticas implementadas en nuestro Laboratorio. Se presenta equipos para efectuar: mediciones espectrales de radiación (Transmisión, Absorción), medición de espesores, mediciones de desplazamientos.
Estudio de hidrocarburos en alga marina parda macrocystis pyrifera
Authors: Acha de la Cruz Otilia
Published: August 2023

A lo largo de las costas de Pucusana, San Bartolo y Ancón - Perú, se colectaron muestras de algas marinas pardas de la especie Macrocystis pyrifera, en donde se hicieron estudios de hidrocarburos, identificándose la presencia de n-alcanos constituidos principalmente por cadenas carbonadas de n-C15H32 hasta n-C30H62. El método involucró un proceso de saponificación de los lípidos y separación de hidrocarburos en n-hexano, purificación en cromatografía con silica gel e identificación en cromatografía de gases.

Los resultados mostraron diferencias importantes en el estudio de la composición de hidrocarburos en las diferentes muestras de algas, obteniéndose información relativa de la posible contaminación con el petróleo, los hidrocarburos parecen derivarse de fuentes biogénicas terrestres y marinas, los cuales son evidenciados por abundante presencia de n-alcanos con átomos de carbono impar.
Caracterización de células fotovoltaicas por medidas de fotocorriente espectral
Authors: Eyzaguirre Carmen , Valera Aníbal , Essing Dominik
Published: August 2023

En este trabajo se presentan los primeros resultados de la colaboración UNI/HAHN-MEITNER-INSTITUT, obtenidos en el diagnóstico de celdas solares de alta eficiencia (Programa Euro-Joule), empleando un espectrómetro de fotocorriente, desarrollado en la UNI.

En primer lugar, se muestra una aplicación del Sistema a una celda solar de Silicio monocristalino de la Empresa ISOFOTON (España), para luego resumir las evaluaciones efectuadas en dos tipos de Celdas "Joule": CdS/Cu(In,Ga,)(S,Se)2 y ZnSe/Cu(ln,Ga,)(S,Se)2.
Disminución de la toxicidad de los motores Diesel mediante el empleo del gas licuado de petróleo
Authors: Lira Cacho Guillermo , N. Patrakhaltsev Nicolai , Ponce Galiano Jorge
Published: August 2023

Se propone un método de suministro de gas licuado de petróleo (GLP) en los motores diésel, con formación interna de la mezcla aire-combustible, para disminuir el humeado y la toxicidad de los gases de escape. Para efectuar la comparación de la toxicidad de diferentes motores se utiliza el criterio de la toxicidad sumatoria convencional de las emisiones totales, la cual toma en cuenta el grado de toxicidad de cada uno de los componentes de los gases de escape. Las pruebas se realizaron tanto en el Instituto de Motores de Combustión Interna de la UNI como en la Universidad de los Pueblos de Moscú y permitieron determinar que la toxicidad sumatoria del motor con el sistema de suministro de GLP propuesto es menor que en el caso de los motores diésel-gas convencionales (con formación externa de la mezcla aire-gas) y que en los motores diésel, en la proporción de 0,75/0,8/1,0, respectivamente.
Un modelo matemático para motores Diesel de aspiración natural
Authors: Lira Cacho Guillermo
Published: August 2023

Se presentan los fundamentos teóricos de un modelo matemático cero-dimensional para la simulación y diagnóstico de motores Diesel de aspiración natural y para el análisis de los procesos y evaluación del comportamiento de estos motores. El modelo se basa en las ecuaciones de continuidad, conservación de la energía y ecuaciones de estado. Se utilizan relaciones empíricas para el cálculo de desprendimiento de calor durante la combustión, para la transferencia de calor hacia las paredes del motor. Durante los procesos de admisión y escape se calcula el intercambio de gases con el medio exterior no considerando los fenómenos ondulatorios en los colectores del motor. A partir de estas consideraciones se calculan las presiones y temperaturas medias (dentro del cilindro) en función del ángulo de giro del cigüeñal y del volumen instantáneo. Para la validación del modelo, se comparan los resultados obtenidos con los valores experimentales de un motor monocilíndrico.
Sistema automatizado de detección de modos de propagación de guías ópticas
Authors: Castillo Guido , Ramos Rodoy , Loayza Carlos , Fernandez Enver , Eyzaguirre Carmen , Valera Anibal , Lomer Mauro
Published: August 2023

En el presente trabajo se presenta un sistema automatizado por PC aplicado a la detección de modos de propagación en guías ópticas. El sistema se aplica al caso particular de una guía multimodo de vidrio, elaborada por el método de intercambio iónico de plata.
Determinación numérica de la resistencia al avance de buques
Authors: Valerio Mena Lenin J. C. , Acosta Pastor Victor N. , Loarte Vicuña Victor A.
Published: August 2023

La utilización de la Teoría Potencial para evaluar la Resistencia al Avance de Buques Pesqueros en aguas calmas, es investigada, con el principal objetivo de obtener resultados comparativos que permitan evaluar el desempeño del método teórico para el uso en el proceso del proyecto preliminar. La simplicidad y rapidez del algoritmo computacional provee una valiosa herramienta que puede ser usada para realizar análisis de diferentes tipos de formas de buques finos, incluyendo buques con proa de bulbo, y obtener resultados cualitativos a un costo computacional muy bajo. De esta forma la interferencia de las diferentes partes del casco puede ser analizada y las formas del buque optimizadas para obtener una mínima resistencia al avance por formación de olas.
PERSPERKTIF PSIKOLOGIS PERUBAHAN METODE PEMBELAJARAN KEWARGANEGARAAN UNTUK PENCEGAHAN PENYEBARAN PAHAM RADIKAL TERORISME
Authors: Mustika Ulfa , Widodo Widodo
Published: August 2023

The dissemination of the radical ideology of terrorism to students has already occurred and needs to be prevented, for example through Citizenship learning. Universities need to make changes in the form of adding methods and learning materials. Psychological and legal studies need to be used as the basis for scientific justification for these changes so that they are in accordance with the psychological conditions of students and are legally valid, and students easily understand the characteristics, dangers, and ways to prevent the spread of the radical ideology of terrorism so as to avoid exposure to radical ideology of terrorism. This article was written based on the results of desk research. The results of the study: (1) Learning materials about the characteristics, dangers, and prevention of the spread of radical-terrorism ideas need to be added to the RPS-KWN so that students' cognitive abilities develop. (2) The case study learning method is suitable for delivering the material because it is in accordance with the psychological characteristics of students based on andragogy. (3) By law, changes to the RPS-KWN in the scope of higher education are legal.
MARI MOI NGONE FUTURU SEBAGAI IDENTITAS KULTURAL: MAKNA DAN IMLEMENTASINYA DALAM KEHIDUPAN MASYARAKAT MALUKU UTARA
Authors: Ibrahim Asriadi , Bau Suharlin , Safi Jamin
Published: August 2023

Mari Moi Ngone futuru is the motto of life for the people of North Maluku which is full of values and has long been used as a way of life for the pluralistic people of North Maluku. This motto functions as a unifier and prevents cross-ethnic and religious conflicts in the region which is also known as Zajirah Al-Mulk. In essence, the position of this motto is almost equal to the motto of Bhineka Tunggal Ika. Nonetheless, the motto of Mari Moi Ngone Futuru is based on the values of local genius. In principle, marimoi ngone futuru existed even before Ternate became a Municipality and North Maluku was not yet a province. In this context, this motto was initiated and introduced as an inter-ethnic glue that often fights in the name of power. Based on the main idea of this motto, the people of North Maluku live and practice this motto to maintain harmony in society which consists of various ethnicities, cultures, religions and languages. The purpose of this qualitative research is to explain the community's perspective on the motto Mari Moi Ngone Futuru and the internalization of the values of this motto in the life of the people of North Maluku. From the data collected through interviews, observations, and document studies and validated by this triangulation, it is concluded that Mari Moi Ngone Futuru has been interpreted as togetherness which strengthens unity and integrity, promotes peace among people, and fosters a spirit of self-sacrifice. The process of internalizing the values of this motto is carried out through habituation and example in socio-cultural activities such as bari activities (gotong royong), liliyan, dina, and so on.