bluuebunny/crossref_metadata_2025 huggingface dataset:
El derecho de resistencia en tiempos de pandemia
Authors: Escribá Pérez Ana N. , Martí Sebastiá Jose Manuel
Published: May 2022

El trabajo que se presta en el ámbito del contrato de trabajo es por definición subordinado al poder de dirección de quien ostenta la titularidad de la empresa. Sin embargo, este poder de dirección o ius variandi no es absoluto, sino que su ejercicio se encuentra sometido a condiciones de legalidad y legitimidad. Consustancialmente al poder de dirección de una parte se encuentra el deber de obediencia de la otra, cuyo contenido se extiende hasta donde alcanza el límite del otro.
En este trabajo se analiza el fundamento y justificación del poder de dirección y el deber de obediencia; y se estudia el derecho de las personas trabajadoras a desobedecer, especialmente, cuando la desobediencia resulte necesaria para preservar la propia vida e integridad como consecuencia de irregularidades que provoquen o puedan provocar una situación de riesgo grave e inminente.
Este desarrollo teórico está al servicio del objeto de la presente investigación que no es otro que el análisis de la vigencia y eficacia del derecho de resistencia de las personas trabajadoras para preservar su propia salud frente al riesgo de contagio por SARS-CoV-2 en el contexto de excepcionalidad generada por la pandemia y la consiguiente limitación de recursos.
ejércitos de la Corona de Aragón y del Comune de Pisa en la guerra por el dominio de Cerdeña (1323-1326): una perspectiva comparada
Authors: Lafuente Gómez Mario
Published: May 2022

Este artículo presenta un análisis comparado de los ejércitos de la Corona de Aragón y del Comune de Pisa en la guerra por el dominio de Cerdeña entre 1323 y 1326, que concluyó con la incorporación de la isla a los dominios de la monarquía aragonesa. Para ello, en primer lugar, se realiza una síntesis sobre el origen y desarrollo del conflicto, y a continuación se abordan tres aspectos principales: la cuantificación de las tropas, el reclutamiento de los combatientes y la financiación. El objetivo es comprobar las semejanzas y diferencias entre dos formaciones estatales concurrentes en el Mediterráneo medieval, como son la Corona de Aragón y el Comune de Pisa, a partir de la bibliografía de tema militar, social y económico, y de un amplio repertorio de fuentes inéditas conservadas en el Archivo de la Corona de Aragón y en los Archivi di Stato de Pisa y Florencia.
Efeito do uso de corpos de prova moldados e extraídos na caracterização mecânica de misturas asfálticas
Authors: Sassaki Vieira da Silva Lucas , Batista dos Santos Bastos Juceline , Barbosa Soares Jorge
Published: May 2022

Não há consenso quanto aos efeitos do uso de amostras moldadas ou extraídas para a caracterização mecânica de misturas asfálticas. O objetivo deste artigo é avaliar o efeito do uso de corpos de prova (CPs) moldados e extraídos de uma mistura asfáltica, fazendo uso de ensaios uniaxiais e triaxiais de deformação permanente, uniaxiais de fadiga por tração-compressão e módulo dinâmico, além de resistência à tração indireta e módulo de resiliência. A variação de granulometria e o teor de ligante nos CPs moldados e extraídos também foram avaliados. Observou-se maior sensibilidade nos ensaios de deformação permanente, seguido por módulo dinâmico e fadiga por tração-compressão. Os ensaios de módulo de resiliência e resistência à tração indireta não apresentaram variação significativa quando comparados os dois tipos de corpos de prova investigados.
Kalker’s coefficient c11 and its influence on the damping and the retuning of a mechanical drive torsion system of a railway vehicle
Authors: Dybala Vojtěch
Published: May 2022

Within the research of electromagnetically excited torsion oscillations in the mechanical part of traction drive systems of modern railway vehicles, which has been realized at the Faculty of mechanical engineering at the CTU in Prague, there are two separate simulation models in use. The basic calculation model, which is utilized to gain basic characteristics of the torsion system as natural frequencies and natural modes of oscillations. And the complex simulation model, which simulates a drive of the vehicle. This contribution is focused on the basic calculation model, which has been built in MATLAB. This model in its first version did not apply the contact between wheels and rails. It was necessary to find out, if this simplification is relevant with respect to subsequent simulations within the complex simulation model and its results. Therefore, the contact interaction as a traction force in longitudinal direction in the wheel-rail contact was realized via the Kalker’s linear theory. This article deals with the comparison between models with and without the implementation of the wheel-rail contact and its influence on the damping within the torsion system and retuning of the torsion system.
Scholars and Literati at the University of Salamanca (1218–1800)
Authors: Vitale Mara
Published: May 2022

This note is a summary description of the set of scholars and literati who taught at the University of Salamanca from its inception in 1218 to the eve of the Industrial Revolution (1800).
The Indonesia Triple Helix Digital Platform Model in Knowledge Sharing for Product Innovation Collaboration
Authors: Hakim Shidiq Al , Sensuse Dana Indra , Lestari Puri Indah
Published: May 2022

The research gap between research institutions or universities and industry is still happening today. That arises because there has not been a maximum research collaboration between academic research and industry. This study aimed to develop a triple helix digital platform model in the product innovation ecosystem. Soft Systems Methodology (SSM) was chosen to conduct proposed scientific contributions in knowledge management in the triple helix digital platform model, especially knowledge sharing in product innovation. Data collected through the literature review and interview process with one researchers and two Small and Medium Enterprise (SME) owners, the seven stages of the SSM are used to analyse the results. This research resulted in a conceptual model and a prototype of a digital platform design with a strong foundation for knowledge sharing product innovation in the digital platform ecosystem. This prototype application will support collaboration between researchers and Small and Medium Industries to product innovation.
Aline Helg: Liberty & Equality in Caribbean Colombia 1770 – 1835. Chapel Hill – Londres: The University of North Carolina Press, 2004, 363 páginas.
Authors: González Henríquez Adolfo
Published: May 2022

Los estudios sobre negritudes tienen una corta historia en Colombia: a los trabajos pioneros de Rogerio Velásquez y Aquiles Escalante siguieron figuras como Nina S. de Friedemann, Virginia Gutiérrez de Pineda y Carlos Patiño Roselli; y más recientemente han aparecido investigadores nacionales y extranjeros con nuevos niveles de exigencia (Taussig, Wade, Streicker Cunin, Fernando Urrea, Eduardo Restrepo). Por demás en el caribe colombiano se cuenta con estudiosos de distintas disciplinas (Claudia Mosquera, Dolcey Romero, Adolfo Meisel, Alfonso Múnera y otros), interesados en la negritud o en el componente negro del mestizaje. A esta lista se suma hoy Aline Helg, de la Universidad de Ginebra, una historiadora con experiencia en temas colombianos y del Caribe.
Una memoria visual para el futuro: La situación de los archivos fotográficos en el Caribe Colombiano
Authors: Gonzalez Cueto Danny
Published: May 2022

A través de la exploración de los conceptos de memoria, memoria social y memoria visual, el autor presenta la situación de la organización, desarrollo, conservación y preservación del patrimonio cultural visual en la región Caribe colombiana, en la que sólo existen en la actualidad dos archivos fotográficos –las Fototecas de Cartagena de Indias y Sincelejo-, resultado preliminar de una investigación que adelantan miembros del “Grupo de Investigación en Historia y Arqueología del Caribe Colombiano”, del Departamento de Historia y Ciencias Sociales de la Universidad del Norte, como parte de su programa de recuperación y rescate de memoria visual histórica.
Palenqueros en Barranquilla. Construyendo identidad y memorias urbanas
Authors: Camargo González Moraima
Published: May 2022

Desde principios del siglo XX comenzaron a llegar personas del Palenque de San Basilio -pequeña población en el departamento de Bolívar- a la ciudad de Barranquilla, una urbe donde confluyeron múltiples migraciones a lo largo del siglo XIX y XX. En la actualidad, ellos configuran y reconfiguran su identidad en ese contexto urbano, mediado además por las dinámicas de reivindicación en torno a la diversidad desarrolladas en el marco de los movimientos sociales afrocolombianos. Aunque ya no viven en la población, y algunos ni siquiera nacieron en ella, siguen identificándose como palenqueros; pero de igual forma se consideran barranquilleros, teniendo presente entonces estos dos referentes territoriales en sus construcciones identitarias a través de una constante negociación. Podemos observar también, cómo en estos procesos se presenta una permanente negociación de sentido con los “otros”.
CLIENTELISMO Y GUERRA CIVIL EN CARTAGENA. SOBRE LAS ESTRATEGIAS POLÍTICAS DE LA ÉLITE CARTAGENERA, (1885-1895)
Authors: Fernández Villa Alfonso
Published: May 2022

El siguiente artículo explora los nexos entre la participación política y la actividad empresarial de los notables de Cartagena durante el decenio siguiente a la Guerra Civil de 1885. Desde esta perspectiva se indaga por las estrategias clientelares a las que recurrieron las familias de la élite que apoyaron al movimiento regenerador de Rafael Núñez. El trabajo pretende abordar una faceta poco conocida de los empresarios decimonónicos de Cartagena. Asimismo, se ilustran aspectos del mundillo de la política como podían ser la violencia partidista, los empréstitos forzosos, las elecciones, los contratos de suministros y obras públicas, los remates de rentas del Estado, permeados por los intereses de las redes familiares.
Las murallas de Cartagena entre patrimonio, turismo y desarrollo urbano El papel de la Sociedad de Mejoras Públicas
Authors: Cunin Elisabeth , Rinaudo Christian
Published: May 2022

La sociedad de Mejoras Publicas de Cartagena se instaura a comienzos del siglo XX, para proponer y supervisar las obras publicas llevadas a cabo en la ciudad y el ornato. Esta institución a lo largo del siglo manejara tres discursos diferentes enfocados hacia la defensa del patrimonio, las politicas urbanas y la promoción turística, en los cuales las murallas se convertirian uno de los ejes principales de los planes de acción de la Sociedad y en punto problemático, ya que su carácter de atractivo turístico y patrimonio de la humanidad, convertira estos muros en zona de frontera entre la Cartagena turistica y organizada de adentro de las murallas y la otra Cartagena, la de afuera, la silenciada.
Ramon Vinyes en Barranquilla (1914 -1925)
Authors: Bacca Ramón Illán
Published: May 2022

El escritor Ramón Illán Bacca aborda en este artículo uno de sus más interesantes acercamientos a la realidad que vivió Ramón Vinyes, conocido como “el Sabio Catalán”, cuando permaneció en Colombia, en su primera estancia, entre 1914 y 1925. Años cruciales en los que Vinyes se convirtió en mentor del “mundillo literario” de Barranquilla, creó la revista “Voces”, que desaparecería en 1920, y fue expulsado bajo el régimen del gobernador del departamento del Atlántico, general Eparquio González, por sus convicciones políticas, en evidente contradicción con ideas del político conservador.
Ramon Vinyes, difusor y lector del teatro contemporáneo
Authors: Gallén Miret Enric
Published: May 2022

allén traza la evolución de las concepciones teatrales de Ramón Vinyes des de sus orígenes literarios en Cataluña y Colombia hasta los años 20 y 30, cuando destacó como polemista y dramaturgo en Cataluña. De mismo modo, destaca su información sobre el género, revelada en una vasta obra periodística y crítica ejercida hasta los años 40 en Barranquilla.
Marisol Rodríguez: Manumisión y abolición en la Provincia de Maracaibo (1810 – 1864). Maracaibo: Acervo Histórico del Estado Zulia. 2003. N° 8.
Authors: Cardozo Galué Germán
Published: May 2022

Constituye este ensayo una novedad en la historiografía venezolana por el tratamiento bajo la perspectiva regional y en la larga duración de la esclavitud, manumisión y abolición de la población de origen africano. Tal enfoque ha permitido a la autora, gracias al acercamiento que logra de lo específico en las diversas localidades de la provincia de Maracaibo durante el siglo XIX, aportar una visión de conjunto de este proceso y sus implicaciones para la construcción de la nación y caracterización de la sociedad venezolana.
Zulimar Maldonado Viloria: Maracaibo en la independencia. Maracaibo: Universidad del Zulia, 2003.
Authors: Cardozo Galué Germán
Published: May 2022

Para romper con los estrechos enfoques de las historias patrias y nacionalistas, las investigaciones sobre los procesos de independencia en Hispanoamérica hacen especial énfasis en la visión de larga y mediana duración; cobran importancia la mutación del Antiguo Régimen a la modernidad, el estudio simultáneo y comparado con el curso ideológico y político de los acontecimientos en la península ibérica (especialmente en cuanto al papel de las Cortes de Cádiz), la presencia del Estado español en el territorio americano durante el período, y la caracterización de la contrainsurgencia en varias ciudades y provincias.
La realidad detrás de la Constitución en la Unión Europea
Authors: Barraza Sergio , Consuegra Luis José , Díaz Lizbeth , Galvis Nataly , García Vanessa , Guzmán Mariángela , Henao Kelly , Lozano Kelly , Rico Maria Carolina , Rojas Erika , Sánchez Pilar , Sandoval Yurani , Tejera Jairo , Torrente Miguel
Published: May 2022

Por: Sergio Barraza, Luis José Consuegra, Lizbeth Díaz, Nataly Galvis ,Vanessa García, Mariángela Guzmán, Kelly Henao, Kelly Lozano, Maria Carolina Rico, Erika Rojas, Pilar Sánchez, Yurani Sandoval, Jairo Tejera, Miguel Torrente. Estudiantes del Programa de Relaciones Internacionales, Universidad del Norte, Barranquilla, Colombia 2005
ARMANDO DUGAND: El científico barranquillero del siglo XX.
Authors: Solano Alonso Jair
Published: May 2022

El presente estudio es un avance de un trabajo mayor, sobre el botánico Armando Dugand Gnecco, considerado el más importante científico oriundo de la ciudad de Barranquilla que durante el siglo XX, tuvo audiencia y visibilidad nacional e internacional de las comunidades científicas de las Ciencias biológicas que practicaba. Se trata de un trabajo de biobibliografía científica muy afín a la tradición de la Historia Social de la ciencia.
Editorial
Authors: Vidal Ortega Antonino , Luquetta Cediel David J.
Published: May 2022

Editorial de Memorias N°21
Los puertorriqueños en los Estados Unidos: la comunidad de Nueva York. Ensayo Fotográfico
Authors: Denis-Rosario Milagros
Published: May 2022

Memoria visual (fotografías) de los puertorriqueños en Nueva York.
Violence and the quotidian scenes of becoming a man
Authors: Decena Carlos
Published: May 2022

This essay turns to quotidian negotiations of homophobia w ithin an immigrant group of self-identified gay and bisexual men to stress how the construction and sustenance of male privilege and of the very contours of the male subject require vigilance and careful policing of all presumably male bodies regardless of their sexual orientations. Based on an analysis of retrospective life history interviews with Dominican gay and bisexual immigrant men conducted between 2001 and 2002, I will propose w hat is at stake in quotidian exchanges among the participants is the fastidious w ork of calibrating the male body to signify “maleness” properly. By drawing attention to the micro-politics of masculine becoming, the essay suggests that attention to recent instances of homophobic violence should be considered as part of larger and chronic patterns of the aggressive policing of the male body in the social. By looking at the continuing pow er that homophobia has to structure gay male networks, the essay also challenges us to consider how patterns of marginalization continue to be reproduced even among the groupings most directly disadvantaged by them.
Editorial
Authors: Vidal Ortega Antonino
Published: May 2022

Editorial
Increasing the Applicability of Strategy Map
Authors: Aydın Ayşegül
Published: May 2022

This study proposes a scoring-based structure to make the strategy map feasible. The subjectivity of cause-and-effect relationships is reduced by scoring the map. By map-based reports the strategy map is included to the performance evaluation process. Weighted total method is used in scoring. Causal relations are added in scoring process by strategic path definition. In reporting phase, traffic lamp method is used with the Pareto principle. The scoring-based structure is designed as a synchronization-driven, system-initiating frame. The proposed structure is coded and a software application that generates strategic map and strategic plan reports is developed.
A Study of Factors Influencing Customers’ Adoption of Mobile Banking in Oman
Authors: Tahir Muhammad , Tummala Mallesh
Published: May 2022

The commercial banking sector in Oman is a dynamic sector with a large number of banking service users. However, the customers’ adoption of technology in terms of online banking and mobile banking remains less due to the various socio-demographic factors. Given the cost and operational benefits of mobile banking, there is a need to understand how commercial banks can motivate non-mobile banking users to adopt mobile banking in this context. Thus, the current study is conducted with a view to understand customers’ adoption of mobile banking using the Perceived Characteristics of Innovation model. The data is collected from the commercial bank account holders who are non-users of mobile banking (n=80). The key findings are that perceived ease of use (β=.487, P<.05); and observability (β=.530, P<.05) positively and significantly influence customers intention to use mobile banking; whereas, relative advantage (β=-.068, P>.05); compatibility (β=-.413, P>.05); and trialabiltiy (β=.371, P>.05) exert insignificant influence on customers intention to use mobile banking. Based on these findings, it can be concluded that perceived ease of use and observability are key factors which commercial banks need to focus to encourage customers to adopt mobile banking.
Wrap & Plant Technology: An Innovative and Cost-Effective Method for Seed Yam Treatment for Nematode Control in Fields
Authors: Dedehouanou Houinsou
Published: May 2022

ABSTRACT

In West Africa, seed yam represents an important source of nematode inoculums in yam fields and a major cause of the disease perpetuation. To enhance nematode control on yam (Dioscorea spp.), a pilot participatory field evaluation was conducted in Benin on nematode control potential of abamectin-treated banana paper (treatment A) using seed wrap method. An additional seed yam wrapped with untreated paper (treatment B) is also considered. Both treatments A & B are then compared to unwrapped seed yam representing the farmers’ practice (FP). In each field, plots are arranged in a randomized complete block design with five replicates. The effects of seed yam treatment on nematode control in fields, gustatory qualities of yam tubers, and both social and profitability studies of the technology were assessed. In the present paper, only the study related to the profitability based on the Net Margin (NM) and the ratio Cost/Profit is presented. Results reveal advantages of treatments A and B over (FP). In fact, production statistics from treatments A and B are significantly higher than those from (FP). Based on the "willingness to pay" approach, the profitability study shows that treatment A has a Net Margin of approximately 153.7% that of (FP). Concerning the ratio Cost/Profit, 100 FCFA (West African CFA franc) spent in yam production using this new technology generates around 79.3 FCFA against 59.9 FCFA for (FP). Despite the success of this pilot study, input prices must be monitored before scaling up this innovation to the other agro-ecological regions of Benin.

Key-words: Nematode control, Dioscorea spp., cost effectiveness, input prices, Wrap & plant technology, Benin
Combined effects of exercise training and D‐allulose intake on endurance capacity in mice
Authors: Tsuzuki Takamasa , Suzuki Ryo , Kajun Risa , Yamada Takako , Iida Tetsuo , Liu Bingyang , Koike Teruhiko , Toyoda Yukiyasu , Negishi Takayuki , Yukawa Kazunori
Published: May 2022

This study investigated the combined effects of exercise training and D‐allulose intake on endurance capacity in mice. Male C57BL/6J mice were fed either a control diet (Con) or a 3% D‐allulose diet (Allu) and further divided into the sedentary (Sed) or exercise training (Ex) groups (Con‐Sed, Con‐Ex, Allu‐Sed, Allu‐Ex, respectively; n = 6–7/group). The mice in the Ex groups were trained on a motor‐driven treadmill 5 days/week for 4 weeks (15–18 m/min, 60 min). After the exercise training period, all mice underwent an exhaustive running test to assess their endurance capacity. At 48 h after the running test, the mice in the Ex groups were subjected to run at 18 m/min for 60 min again. Then the gastrocnemius muscle and liver were sampled immediately after the exercise bout. The running time until exhaustion tended to be higher in the Allu‐Ex than in the Con‐Ex group (p = 0.08). The muscle glycogen content was significantly lower in the Con‐Ex than in the Con‐Sed group and was significantly higher in the Allu‐Ex than in the Con‐Ex group (p < 0.05). Moreover, exercise training increased the phosphorylation levels of adenosine monophosphate‐activated protein kinase (AMPK) in the muscle and liver. The phosphorylation levels of acetyl coenzyme A carboxylase (ACC), a downstream of AMPK, in the muscle and liver were significantly higher in the Allu‐Ex than in the Con‐Sed group (p < 0.05), suggesting that the combination of exercise training and D‐allulose might have activated the AMPK‐ACC signaling pathway, which is associated with fatty acid oxidation in the muscle and liver. Taken together, our data suggested the combination of exercise training and D‐allulose intake as an effective strategy to upregulate endurance capacity in mice. This may be associated with sparing glycogen content and enhancing activation of AMPK‐ACC signaling in the skeletal muscle.
Assessment of the anesthetic effect of modified pentothal sodium solution on Sprague-Dawley rats
Authors: Chen Xianzhen , Wang Shiqing , Li Youjiong , Lin Chunjin , Liu Xiaofang
Published: May 2022

Clinically, pentothal sodium has been widely used for primary and general anesthesia induction. Also, it has been used to effectively inhibit convulsion. Pentothal sodium has a strong inhibitory effect on the respiratory center, excessive drug administration, and rapid dose rate that cause death of experimental animals on the respiratory depression. This study used a modified pentothal sodium solution to investigate its anesthetic effect. The pentothal sodium solution was modified based on pentothal sodium upon additions of magnesium sulfate, propylene glycol, and pure ethanol. The anesthetic effect of the modified pentothal sodium on Sprague–Dawley (SD) rats was investigated by comparing traditional pentothal sodium and ketamine; 60 SD rats were randomly divided into three groups. Each group was treated with traditional pentothal sodium, modified pentothal sodium, or ketamine, respectively, via intraperitoneal injection. The symptoms of experimental rats were observed, and onset time and anesthetic time were both recorded. The data were analyzed using statistical software. There were no significant differences in onset time and anesthetic time between the three groups. The variation of onset time and anesthetic time of the group treated with modified pentothal sodium was shorter than that of the other two groups. Furthermore, the number of anesthetic rats after the first injection was significantly higher than that of the other two groups. The modified pentothal sodium is capable of providing a stable anesthetic effect. The function and effect are much better than traditional pentothal sodium and ketamine.
Prostate health index (PHI) as a reliable biomarker for prostate cancer: a systematic review and meta-analysis
Authors: Agnello Luisa , Vidali Matteo , Giglio Rosaria Vincenza , Gambino Caterina Maria , Ciaccio Anna Maria , Lo Sasso Bruna , Ciaccio Marcello
Published: May 2022

Objectives

Prostate cancer (PCa) represents the second most common solid cancer in men worldwide. In the last decades, the prostate health index (PHI) emerged as a reliable biomarker for detecting PCa and differentiating between non-aggressive and aggressive forms. However, before introducing it in clinical practice, more evidence is required. Thus, we performed a systematic review and meta-analysis for assessing the diagnostic performance of PHI for PCa and for detecting clinically significant PCa (csPCa).

Methods

Relevant publications were identified by a systematic literature search on PubMed and Web of Science from inception to January 11, 2022.

Results

Sixty studies, including 14,255 individuals, met the inclusion criteria for our meta-analysis. The pooled sensitivity and specificity of PHI for PCa detection was 0.791 (95%CI 0.739–0.834) and 0.625 (95%CI 0.560–0.686), respectively. The pooled sensitivity and specificity of PHI for csPCa detection was 0.874 (95%CI 0.803–0.923) and 0.569 (95%CI 0.458–0.674), respectively. Additionally, the diagnostic odds ratio was 6.302 and 9.206, respectively, for PCa and csPCa detection, suggesting moderate to good effectiveness of PHI as a diagnostic test.

Conclusions

PHI has a high accuracy for detecting PCa and discriminating between aggressive and non-aggressive PCa. Thus, it could be useful as a biomarker in predicting patients harbouring more aggressive cancer and guiding biopsy decisions.
Role of individual differences in incidental L2 vocabulary acquisition through listening to stories: metacognitive awareness and motivation
Authors: Shin Hye Won , Sok Sarah , Do Juhyun
Published: May 2022

This study examined the moderating role of two individual difference factors, metacognitive awareness of listening and motivation, in young second language (L2) learners’ incidental vocabulary acquisition from listening to stories. Participants were 66 fifth-grade English as a Foreign Language learners in South Korea who were randomly assigned to one of two groups: listening to stories or control. A vocabulary meaning recognition test was administered as a pretest, posttest, and delayed posttest. Self-reported questionnaires were employed to assess participants’ metacognitive awareness and motivation. Metacognitive awareness of listening, or more specifically, mental translation strategies, were shown to moderate the effects of treatment such that L2 learners who indicated greater awareness of translation strategies learned more vocabulary from listening to stories than L2 learners who had less awareness of these strategies. Motivation also moderated the effects of treatment such that L2 learners who had higher intrinsic motivation to learn English were able to acquire more vocabulary through listening to stories than learners who were less motivated.
Comparative analysis between homogeneous and heterogeneous models of gas cooled fast reactor core (GFR-2400)
Authors: Ibrahim Amr , Aziz Moustafa , El-Fiki Soad A. , Galahom Ahmed Abdelghafar
Published: May 2022

The main objective of the presented work is to investigate the effectiveness of homogenization of the GFR-2400 core in simulating its neutronic characteristics. To explore and evaluate the neutronic behavior of the large scale Gas cooled Fast Reactor GFR-2400 core, two computer models (homogeneous and heterogeneous) were designed using the MCNPX code. The designed heterogeneous model has been validated by comparing its results with a previously published paper. The results of both models were compared with each other to study the effect of fuel homogeneity on the radial flux and power distribution through the core. As part of a safety analysis of the reactor core for both designs, the reactivity worth of control rods, Effective delayed neutron fraction (ß
eff), Doppler constant and Depressurization effect have been analyzed and compared. The variations of the effective multiplication factor (k
eff), the minor actinides concentration and the most important fission products as a function of operation time have been investigated for the presented designs.
Structures devised by the generalizations of two graph operations and their topological descriptors
Authors: Raza Hassan , Waheed Muhammad , Jamil Muhammad Kamran , Azeem Muhammad
Published: May 2022

Graph theory served in different fields of sciences, especially in chemistry in which creating complex structures and studying their enormous properties. Graph operation is a tool to construct complex chemical structures using basic graphs. While studying their properties, topological descriptors are a well-known methodology introduced by chemists, and even after half of a century past, it is still serving. Formally, a topological descriptor or index is a numerical value corresponding to a chemical structure. This numerical value can be easily accessed by a particular equation, for example, the second Zagreb index, the first reformulated Zagreb, and also from the forgotten topological descriptor. In this particular work, we generalized two existing graph operations, and by using these newly developed graph operations, we created two complex structures by using two graph operations, namely, the corona product and double graph operation. Furthermore, to evaluate the chemical properties of these newly generated structures, we used the methodology of topological descriptors, particularly the first and second Zagreb, the first reformulated Zagreb, and forgotten topological descriptors. Moreover, we also presented the closed formulas of the first and second Zagreb co-indices for these newly generated structures.
Inverse design of structural color: finding multiple solutions via conditional generative adversarial networks
Authors: Dai Peng , Sun Kai , Yan Xingzhao , Muskens Otto L. , de Groot C. H. (Kees) , Zhu Xupeng , Hu Yueqiang , Duan Huigao , Huang Ruomeng
Published: May 2022

The “one-to-many” problem is a typical challenge that faced by many machine learning aided inverse nanophotonics designs where one target optical response can be achieved by many solutions (designs). Although novel training approaches, such as tandem network, and network architecture, such as the mixture density model, have been proposed, the critical problem of solution degeneracy still exists where some possible solutions or solution spaces are discarded or unreachable during the network training process. Here, we report a solution to the “one-to-many” problem by employing a conditional generative adversarial network (cGAN) that enables generating sets of multiple solution groups to a design problem. Using the inverse design of a transmissive Fabry–Pérot-cavity-based color filter as an example, our model demonstrates the capability of generating an average number of 3.58 solution groups for each color. These multiple solutions allow the selection of the best design for each color which results in a record high accuracy with an average index color difference ΔE of 0.44. The capability of identifying multiple solution groups can benefit the design manufacturing to allow more viable designs for fabrication. The capability of our cGAN is verified experimentally by inversely designing the RGB color filters. We envisage this cGAN-based design methodology can be applied to other nanophotonic structures or physical science domains where the identification of multi-solution across a vast parameter space is required.
Potent neutralization by monoclonal human IgM against SARS‐CoV‐2 is impaired by class switch
Authors: Callegari Ilaria , Schneider Mika , Berloffa Giuliano , Mühlethaler Tobias , Holdermann Sebastian , Galli Edoardo , Roloff Tim , Boss Renate , Infanti Laura , Khanna Nina , Egli Adrian , Buser Andreas , Zimmer Gert , Derfuss Tobias , Sanderson Nicholas S R
Published: May 2022

To investigate the class‐dependent properties of anti‐viral IgM antibodies, we use membrane antigen capture activated cell sorting to isolate spike‐protein‐specific B cells from donors recently infected with SARS‐CoV‐2, allowing production of recombinant antibodies. We isolate 20, spike‐protein‐specific antibodies of classes IgM, IgG, and IgA, none of which shows any antigen‐independent binding to human cells. Two antibodies of class IgM mediate virus neutralization at picomolar concentrations, but this potency is lost following artificial switch to IgG. Although, as expected, the IgG versions of the antibodies appear to have lower avidity than their IgM parents, this is not sufficient to explain the loss of potency.
Identification and Evaluation of Criteria of Agile Manufacturing Using DEMATEL: A Case from an Indian Metal Fabrication Industry
Authors: Bathrinath S. , Sai Charan Vadakapur , Ponnambalam S.G. , Saravanasankar S.
Published: May 2022

In metal fabrication industry, assembling department plays the major role since it involves risks in assembling the components. Hence, it is always difficult for the manufacturers to identify the criteria of agile manufacturing in assembling department that effects the assembly of the fabricated metal components. Agile manufacturing is one of the innovative method of manufacturing, which focus on the customer satisfaction and also maintaining the quality and cost of the product. Metal fabrication industries generally struggle to find right criteria for better agile manufacturing process. This study focuses on the selection of suitable criteria for agile manufacturing, which requires an in-depth analysis depending on the influence they possess on the agile manufacturing. The objective of this paper is to analyze and identify the most influencing criteria for the metal manufacturing industry based on the customers’ and industrial expert’s perspective. Here we have selected ten different criteria based on the literatures available on the agile manufacturing. The criteria are segregated and ranked according to the nature and influence they possess on other criteria using decision making trial and evaluation laboratory (DEMATEL) methodology. This study also helps the metal fabrication industry to identify the most influencing criteria to implement on agile manufacturing and to have high efficiency on the production. The results show that the customer satisfaction seems to be the primary criteria that will have more influence in metal fabrication industry.
Optimization of Cutting Parameter for Machining Ti-6Al-4V Titanium Alloy
Authors: N.H.D. Noor Danish , A.H. Musfirah
Published: May 2022

Titanium alloy Ti-6Al-4V, has been broadly used in industries, primarily medical manufacturing, and aerospace, due to their considerable mechanical properties. Aerospace structural components made of titanium alloy (Ti-6Al-4V) material, a difficult-to-machine material which results in massive cutting force, steep cutting temperature, and significant tool wear. In this research, carbide insert tool is used to cut a Ti-6Al-4V titanium block at constant depth of cut of 0.50 mm using the method of dry machining is investigated with the aim of estimating the effects of two manipulated cutting parameters, which are spindle speed (140 and 150 m/min), and feed rate (0.1 and 0.2). This was done to observe their effects on the tool wear of the insert. The objective of this study is to study the machinability performance of coated carbide insert tool under dry machining condition, and to optimize the cutting parameter to machine Ti-6Al-4V using dry machining method. It was found in this research that lowest valued parameter, Parameter 1 (140 m/min, 0.1 mm/rev) caused the most flank wear, and the roughest surface on the Ti-6Al-4V block. Lower speeds can possibly inflict higher shocking force, which leads to higher wear propagation.
Impacts of wet thermal treatment on heavy metals speciation in contaminated waste activated sludge using a modified sequential extraction scheme
Authors: Zhang Jian , Gan Peng , Xie Tian , Liu Yang , Zhu Hong-xiang
Published: May 2022

The mobility and the bioavailability of heavy metals in waste activated sludge were determined according to their total content and chemical speciation. A modified three-step sequential extraction procedure was used to determine the total content and metal speciation distribution pattern of various heavy metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) pretreated at a temperature of 100 °C to 200 °C. It was found that the organics solubilization was enhanced at higher temperature, increased by 1.75, 183 and 3.03 folds over the soluble chemical oxygen demand (SCOD) at 100 °C. The total contents of Cd, Pb and Zn exceeded the threshold value established in GB/T standard 23486 (2009), as a function of pH, due to the pollution from the local nonferrous metals industry. For most cases, the impacts of thermal pretreatment on the species distribution were limited and obscure. Cr was the only element showing a potential risk of metal mobilization, such that its residual fraction shifted towards oxidizable fraction at higher treatment temperature. The speciation distribution pattern of Ni, Cr, Cu, and Zn showed potential risks of contamination due to their bioavailability, mobility, or toxicity.
The design and evaluation of three-dimensional corner joints used in wooden furniture frames: Experimental and numerical
Authors: Chen Bingrui , Xia Haiyan , Hu Wengang
Published: May 2022

This study aimed to design and evaluate the detachable corner joints used in wooden furniture frames, including a commonly used detachable joint (control) form using mortise and tenon with plug reinforcement and three novel proposed joints, i.e., novel joint I ~ III, which adopted in-line double-hole nuts, metal sheet connector, and embedded nuts and screws respectively, via numerical and experimental methods. The numerical analysis results indicated that the optimal proposed joint (novel joint І) had good mechanical performance when subjected to bending load with proper stress distributions and relatively low maximum stress compared with the other two proposed joints. The experimental results showed that the bending load resistance of the control and the optimal proposed joints were 1920 N (0.14) and 4390 N (0.05), respectively. The bending moment capacity and bending stiffness of the optimal joints were remarkably higher than the bending moment capacity and bending stiffness of the control joint. In addition, the combination of the numerical and experimental methods could effectively simplify the steps of furniture connection design and development and save costs in terms of time and materials.
Keliamo turinio strategijos analizė socialinio tinklo „Facebook“ puslapiuose
Authors: Eirošius Dominykas
Published: May 2022

Straipsnyje yra pristatoma socialinio tinklo „Facebook“ puslapiuose keliamo turinio strategijos analizė. Turinio strategija apibūdinama kaip turinio publikavimo planavimas, kūrimas pasirinktomis tematikomis bei kitoks turinio valdymas. Ši analizė buvo atlikta analizuojant tris „Facebook“ puslapius ir naudojantis latentiniu Dirichlė paskirstymo algoritmu, skirtu temų modeliavimui. Temų modeliavimas padeda analizuoti ir geriau suprasti nestruktūrizuotų tekstų rinkinius, kurie savyje slepia daugybę naudingos informacijos. Tyrimo metu, iš beveik 9 tūkst. vaizdo įrašų pavadinimų buvo sudarytos 10 temų, kurios leido detaliau pažvelgti į keliamą turinį. Išanalizavus duomenis buvo atskleistos keliamo turinio strategijos bei jų pasikeitimai nagrinėjamu laikotarpiu.
Usos y aproximaciones generizadas: Diálogos en torno a la intervención de patrimonio cultural
Authors: Ayala Macías Elvia Guadalupe , Vega Laura Susana Zamudio , García García De León Aurora
Published: May 2022

En este artículo se plantea la necesidad de reformular las pautas doctrinales que sustentan los estudiospatrimoniales, así como reposicionar la incidencia de los fenómenos sociales en contextos de valor histórico ycultural, en los cuales se genera una paradoja entre la conservación de la materialidad de los bienesmonumentales y la significación producto de los nuevos usos que a ellos se otorgan. Para ello, nos referiremos concretamente a las manifestaciones sociales feministas que se han presentado en los últimos años en el territorio mexicano. A partir de este contexto, se invita al lector a revisitar el estado actual de las conceptualizaciones y legislación patrimonial, con la intención de considerar aproximaciones teóricas más integradoras en torno al género y el espacio público. Este ensanche interpretativo se fundamenta a partir de la revisión etnográfica de material difundido en medios de comunicación digitales. Con este ejercicio, se busca analizar las reacciones polémicas que han surgido a raíz de las intervenciones físicas y virtuales realizadas por grupos feministas en sitios patrimoniales. Esto deja entrever diversas narrativas con relación a la resignificación y deslegitimación contemporánea del patrimonio. Habrá que precisar que esta pesquisa se realiza desde una visión multidisciplinaria e interseccional con la que se invita al lector a realizar una revisión profunda de las percepciones, actitudes y valores que la sociedad construye en torno a los bienes históricos y culturales.
La okupación y la apropiación del entorno urbano: Experiencias de la intervención urbana desde el movimiento de Okupación
Authors: Arredondo Jesus Rojas , Orive Agriano Mariel
Published: May 2022

El desarrollo del capitalismo ha convertido las ciudades en mercancía haciendo cada vez más difícil habitarlas. En este sentido, los movimientos sociales actúan como movilizadores de una sociedad que reclama lo que es suyo, exige poder vivir, disfrutar e interactuar activamente en los espacios que le rodean. Este artículo se centra en la descripción de los efectos del movimiento de okupación entendido como un proceso de intervención social en el entorno urbano. A través de la apropiación de espacios vaciados, el movimiento okupa interviene en la construcción de relaciones y redes de apoyo que mantienen las personas que habitan y participan de esos lugares. Los resultados nos muestran que a través de la interacción directa y una organización horizontal, sin jerarquías, es posible dotar a las personas de herramientas y procesos para habitar sus barrios y sobreponer el valor de uso y experiencia al valor de cambio. Así, las conclusiones permiten visibilizar cómo un movimiento social como el de okupación puede convertirse en un instrumento de intervención urbana, a la vez que se recalca la importancia de la autogestión y de la acción social directa para que las personas se organicen, autogestionen y actúen sobre el entorno que quieren habitar.
Rastro de plática: una propuesta metodológica para mapear del temor al delito
Authors: Barrantes Chaves Karla
Published: May 2022

En los últimos años se han incrementado las investigaciones donde la persona entrevistadoracamina con sus participantes para capturar sus percepciones sobre el entorno. Este artículo explora una aproximación metodológica basada en tecnologías móviles para estudiar la percepción de (in)seguridad en barrios. Se propone la creación de mapas de “Rastro de plática” basados en la georreferenciación de códigos a partir en entrevistas caminantes. Esta herramienta emplea un rastreo mediante aplicaciones de GPS para localizar los comentarios de participantes. La metodología combina software para análisis cualitativo (NVivo) con SIG, la codificación de la información se lleva a cabo a partir de Análisis Temático. El resultado de este proceso es una serie de mapas donde los códigos son representados por íconos asociados a la base de datos en SIG. De esta forma la información tiene múltiples formas de representación para su análisis, tales como clasificación por temas, subtemas, por actitud del participante, por género, entre otras. Esta metodología permite asociar narrativas sobre el espacio con las características físicas del ambiente construido. Aunque la investigación en la cual se probó esta herramienta se enfoca en el temor al delito, esta metodología es fácilmente replicable para otros propósitos que engloben la percepción del entorno construido.
COOVIFUDAM: incidencia en la política habitacional desde un enfoque feminista de la violencia estructural
Authors: Rojas Ugalde Adriana
Published: May 2022

El proceso de incidencia política es una prueba más de la invisibilización y el no reconocimiento de la categoría política de mujer como categoría histórica y socialmente construida, atravesada por relaciones de poder, determinadas por la clase, el género, la racialización, nacionalidad, entre otras intersecciones (Espinoza, 2010). En este artículo, se presenta una reseña de experiencias colectivas de la cooperativa de vivienda por ayuda mutua (COOVIFUDAM R.L.) en Costa Rica nunca vistas desde el lente feminista. Se evidencia la violación del goce de derechos básicos debido a que seguimos siendo excluidas de los espacios de participación política, de espacios de elaboración de políticas públicas habitacionales y de toma de decisiones que nos afectan directamente. Las políticas viviendistas siguen siendo parciales, asumiendo el hábitat como una casa de 4 paredes y un techo, sin consideraciones sobre el uso diferenciado por género, entrecruzado con la clase. En el texto se aborda ¿de qué manera es la negación sistemática de la vivienda para las mujeres una forma más de violencia estructural? Sin embargo, existen espacios organizativos que compartimos habitares como bienes comunes, que se constituyen en herramientas de lucha para resolver no solo el acceso a una vivienda adecuada sino la posibilidad del reconocimiento desde otras identidades plurales, tal es el caso del cooperativismos de vivienda por ayuda mutua.
Enrehóyate y Sinámar: urbanismo participativo en espacios vulnerables de ciudades insulares (Gran Canaria, España)
Authors: González Ramírez Federico
Published: May 2022

Enrehóyate y Sinámar son dos experiencias de sociopraxis participativa en las dos ciudades más habitadas de la isla de Gran Canaria, en el contexto de los principales proyectos de regeneración urbana de Canarias: el Plan de Reposición de Las Rehoyas-Arapiles (Las Palmas de Gran Canaria), un espacio vulnerable de 2.558 viviendas, que será demolido y se volverá a construir para ser habitado por los mismos vecinos, y el Plan Integral del Valle de Jinámar (Telde), que pretende la transformación sociourbana en uno de los polígonos de vivienda pública de mayor dimensión del Estado español. El objetivo principal de ambas experiencias fue la incentivación de las redes sociales latentes y conformación de nuevo capital social, mediante analizadores históricos de experiencias vecinales significativas previas, que sustenten la construcción de nuevos conjuntos de acción e interlocución vecinal, promovida desde las instituciones locales, en una etapa temprana de procesos más amplios de participación ciudadana previstos en ambos proyectos. Las causas de la debilidad del capital social previo son distintas: acumulación de población dependiente y familias monoparentales, con escasa participación social, por la vivienda mínima de Las Rehoyas; y la traumática disolución de capital social vecinal propiciada por el poder político, en sus años fundacionales, en el Valle de Jinámar. Las nuevas prácticas vecinales surgieron a partir de una planificación tradicional previa de talleres formativos intergeneracionales, que permitió la reflexión conjunta de antiguos líderes de asociaciones vecinales y actuales representantes de las comunidades de vecinos administrativas, y la creación de nuevas plataformas y colectivos.