bluuebunny/crossref_metadata_2025 huggingface dataset:
Bio-Inspired Workflow Scheduling on HPC Platforms
Authors: Kaur Mandeep , Kadam Sanjay
Published: March 2021

Efficient scheduling of tasks in workflows of cloud or grid applications is a key to achieving better utilization of resources as well as timely completion of the user jobs. Many scientific applications comprise several tasks that are dependent in nature and are specified by workflow graphs. The aim of the cloud meta-scheduler is to schedule the user application tasks (and the applications) so as to optimize the resource utilization and to execute the user applications in minimum amount of time. During the past decade, there have been several attempts to use bio-inspired scheduling algorithms to obtain an optimal or near optimal schedule in order to minimize the overall schedule length and to optimize the use of resources. However, as the number of tasks increases, the solution space comprising different tasks-resource mapping sequences increases exponentially. Hence, there is a need to devise mechanisms to improvise the search strategies of the bio-inspired scheduling algorithms for better scheduling solutions in lesser number of iterations/time. The objective of the research work in this paper is to use bio-inspired bacteria foraging optimization algorithm (BFOA) along with other heuristics algorithms for better search of the scheduling solution space for multiple workflows. The idea is to first find a schedule by the heuristic algorithms such as MaxMin, MinMin, and Myopic, and use these as initial solutions (along with other randomly generated solutions) in the search space to get better solutions using BFOA. The performance of our approach with the existing approaches is compared for quality of the scheduling solutions. The results demonstrate that our hybrid approach (MinMin/Myopic with BFOA) outperforms other approaches.
Del relato mínimo a la narración aumentada: algunos ejemplos en el microrrelato español actual
Authors: Bustamante Valbuena Leticia
Published: March 2021

En los primeros años del siglo XXI, el microrrelato se ha convertido en claro exponente de la narrativa híbrida, multiplataforma, hipermedial y transmediática. Estos fenómenos se manifiestan en diversos soportes y se difunden por medios de comunicación analógicos y digitales, aunque actualmente estos últimos ocupen un lugar destacado. El peculiar recorrido de algunos microrrelatos españoles contemporáneos puede demostrar cómo los principales rasgos definidores de este género –mundo referencial complejo, virtualidad narrativa y brevedad textual extrema- propician estas transformaciones. Además de constatar las mutaciones sufridas por estos textos en su periplo multiplataforma, al cotejar su análisis desde la teoría del microrrelato con las interpretaciones semióticas de los códigos que se combinan, se llegará a conclusiones reveladoras. Todos los planos del relato se verán comprometidos: se dotará de sentidos unívocos a indicios de la elipsis discursiva, se concretarán incertidumbres y vacíos intencionados en el plano de la historia y las referencias serán más directas.  La duda fundamental es si realmente estamos ante la transformación de relatos mínimos de discurso brevísimo en narraciones aumentadas o si, por el contrario, el resultado coarta el poder de sugerencia, intrínseco al género).
Aspectos retóricos en el microrrelato hispánico
Authors: Garribba Aviva
Published: March 2021

A pesar de que en ocasiones se ve la retórica como algo opuesto a la austeridad y esencialidad propia del microrrelato, el arte del bien decir tiene en realidad un papel esencial, pues algunas figuras retóricas resultan ser muy propias de este género y son empleadas justamente para alcanzar el resultado de un texto sumamente compacto y a la vez de efecto contundente.
Se analizan algunos aspectos del papel de la retórica en el microrrelato hispánico actual a través de los textos publicados en dos antologías recientes. Se describen las figuras retóricas más frecuentes y relevantes, su función y su posición en el texto.
Miniaturas del final. La prosa breve de Günther Anders entre filosofía y literatura.
Authors: Latini Micaela
Published: March 2021

Este trabajo se propone estudiar algunos textos breves de la prosa literaria de Günther Anders destacando los puntos de contacto con los temas fundamentales de su recorrido filosófico: la cuestión del final del hombre, la tesis del desajuste entre imaginación y producción humana, y, sobre todo, la dinámica del analfabetismo emotivo. De ahí la importancia que Anders atribuye a la fantasía (incluso narrativa) en tanto herramienta de comprensión de la realidad.
L'articolo intende indagare alcuni testi brevi della prosa letteraria di Günther Anders, sottolineando i punti di convergenza con i motivi fondanti del suo percorso filosofico: la questione della fine dell'uomo, la tesi della discrepanza tra immaginazione e produzione umana, ma soprattutto la dinamica dell'analfabetismo emotivo. Di qui l'importanza che Anders affida alla fantasia (anche narrativa), come strumento di comprensione della realtà.
Vies brèves et microfiction
Authors: Rabaté Dominique
Published: March 2021

Situant le genre de la microfiction dans la ligne des écritures de vies, cet article prend l’exemple des Vies pøtentielles de Camille de Toledo pour réfléchir aux bénéfices de la forme très brève comme évocation des potentialités de vie autre. La multiplication des scénarios imaginaires traduit la position de l’individu contemporain, son défaut ontologique, son désir impossible de se résumer à une histoire.
Infancia y microrrelato.
Authors: Noguerol Jiménez Francisca
Published: March 2021

El presente artículo analiza la frecuente proyección de la infancia en el microrrelato, para lo que se destaca la presencia del niño como tema, personaje y narrador de sus páginas. Se señalan los principales motivos de estos textos –la infancia como paraíso perdido, el valor de las experiencias iniciáticas, el niño como sujeto subalterno- y las estrategias retóricas que definen a un individuo calificado desde su nombre latino –“infans”- como el que no habla. Desde este punto de vista, se analizan las elipsis características de su discurso, su uso de imágenes y referentes sensoriales y su utilización de tiempos verbales presentes y perfectos, que lo descubren como personaje en tensión. Todos estos rasgos vinculan la infancia con la práctica del microrrelato.
Hacia una aproximación a la micronovela en la literatura hispanoamericana actual
Authors: Vázquez Guevara Rony
Published: March 2021

El microrrelato es una forma narrativa caracterizada por su brevedad extrema que ha llamado la atención de los investigadores durante las últimas casi cuatro décadas; sin embargo, actualmente no es el único fenómeno literario que ha surgido en los últimos años, pues han resucitado otros géneros literarios, también brevísimos, como los aforismos, la poesía breve, que de una u otra manera han propiciado el surgimiento de una modalidad textual que ha sido denominada micronovela. Por ello, nuestro objetivo consiste en presentar algunas de sus características, en base al análisis de cuatro libros, con la finalidad de formular una tentativa definición de esta modalidad textual.
La fotografía humanista como germen microficcional
Authors: Losada Coca Sara
Published: March 2021

Este artículo analiza la importancia de la fotografía humanista como referente microficcional. Plantea la relación entre el microrrelato y la fotografía humanista: sus similitudes y posibilidades expresivas, puesto que ambas disciplinas artísticas utilizan herramientas retóricas comunes. Se parte de la hipótesis de las posibilidades expresivas de la imagen por sí misma para posteriormente, a través de un análisis relacional, descubrir la gran convergencia entre fotografía humanista y microficción.
El objetivo de investigación es demostrar que la fotografía humanista utiliza medios expresivos similares al microrrelato. Una búsqueda de la empatía y un golpe de efecto instantáneo que desarrollan posteriormente los medios de comunicación, las redes sociales e Internet a través de la combinación de imágenes y textos breves.
Réquiem por la obra
Authors: Bustamante Zamudio Guillermo
Published: March 2021

Pese a la diversidad de los productos artísticos (plástica, música, literatura), el campo —en el sentido de Bourdieu— del arte tiene unas características, en la medida en que, en tanto campo, es una lógica de producción de enunciados, no una práctica social específica. Así, en la vida social se combinan prácticas (provistas de gramáticas simples o complejas, como sugiere Bajtín) y de enunciados (provenientes de distintos campos), lo cual implica recontextualizar permanentemente los productos de los diferentes campos. Pues bien, el producto del campo del arte es la obra. Pero el espacio social en el que circulan sus productos, de un tiempo para acá ha impuesto la dejación paulatina de la obra. Es lo que se suele llamar “arte contemporáneo”, que, al tener cada vez menos obra, requiere del auxilio de otras instancias que enuncien lo que no hay. ¿En qué medida la minificción forma parte de esta tendencia?
De cuestiones, noticias y varias cosas de las minificciones del Fraile Navarrete
Authors: Rojo Violeta
Published: March 2021

La vasta y casi desconocida obra del fraile José Antonio Navarrete (Caracas, 1749-1814), nos permite descubrir al más antiguo antecesor de la minificción venezolana. Sus textos, resúmenes y comentarios sobre todos los libros leídos por el fraile hace doscientos años, recuerdan no sólo a Borges, sino son un ejemplo de las “minificciones de lector”. En este artículo se analiza la vida y obra de Navarrete y cómo las influencias literarias existen aún en siglos diferentes y por personajes que nunca se conocieron.
Microrrelato, bitácora y la preocupación social
Authors: Draus Kłobucka Agata
Published: March 2021

En el artículo se analizan las analogías entre el microrrelato publicado en la red y las bitácoras, en especial el espejismo de la realidad y la crítica social. Se utilizan herramientas del estudio narratológico y sociológico para analizar el discurso y el contexto de la creación y publicación de textos ficticios, autoficticios y autobiográficos en internet para demostrar la influencia de las nuevas tecnologías en la estructura, el estilo y la temática de los microrrelatos y los blogs. Se comenta el concepto del arte participativo y se indican algunos aspectos de la crítica social presentes en la obra literaria y autobiográfica de varios autores de microrrelatos.
Un precedente del microrrelato en la pintura del siglo XV: Discursos paralelos en los trípticos de los Primitivos Flamencos.
Authors: Rodríguez Velasco María
Published: March 2021

La revolución pictórica que impulsan los primitivos flamencos en el siglo XV implica una renovación de sus repertorios y esquemas compositivos, sumando a la perfección técnica del óleo una gran riqueza de significados en sus obras. El diseño de los trípticos, al modo de los pórticos monumentales de las iglesias y catedrales del medioevo, podría equiparase a los microrrelatos literarios, en la medida que los pintores componen narraciones pictóricas a partir de la suma de pequeñas escenas trabajadas en grisalla.
Estos episodios, expuestos secuencialmente, responden fundamentalmente a una fuente primaria, la Biblia, si bien en muchos casos su interpretación remite a otros escritos de la tradición cristiana y la teología medieval que enriquecen su interpretación y explican la unidad del conjunto.
La creación de microrrelatos plásticos se concreta en el “Tríptico de Miraflores”, de Rogier van der Weyden, el “Tríptico de la Virgen”, de Dieric Bouts y el “Tríptico de la Redención”, de Vrancke van der Stockt, quienes aúnan caracteres narrativos y simbólicos para mayor expresividad de sus microrrelatos plásticos.
Twitter y la minificción: un espacio de contacto entre los autores y sus lectores y la creación de microrrelatos interactivos.
Authors: Hale Raelynne
Published: March 2021

Twitter, la plataforma digital que mantiene 100 millones de usuarios y más de 500 millones de tuits al día, ha abierto la posibilidad de interacción inmediata con un/a autor/a y sus lectores. En México, uno de los cuatro países que tiene más de 20 millones de usuarios, Twitter ha sido una plataforma ideal para que algunos/as autores/as promuevan sus microrrelatos e interactúen con sus lectores y seguidores. Autores/as mexicanos/as como Guillermo Arriaga, Liliana Blum, Raquel Castro, Alberto Chimal, Francisco Hinojosa, Valeria Luiselli, Fernanda Melchor, Guadalupe Nettel, Elena Poniatowska, Cristina Rivera Garza, Alberto Ruy-Sánchez, Jordi Soler, Juan Villoro, Jorge Volpi y José Luis Zárate han empleado la plataforma Twitter para publicar microrrelatos, promover sus publicaciones e interactuar con sus lectores y seguidores. Esta investigación pretende analizar el empleo de Twitter de los autores, sus publicaciones en él y sus conexiones con sus lectores/seguidores.
Eno Teodoro Wanke y la Poética de la Reversibilidad
Authors: Marques Viana Ferreira Ana Sofia
Published: March 2021

Eno Teodoro Wanke (Ponta Grossa, 1929 – Río de Janeiro, 2001) es autor de cinco libros de microrrelatos, publicados entre finales de los 80 e inícios de los 90. Pese a la escasa recepción crítica, sus obras demuestran un dominio de las estrategias y recursos que más caracterizan el microrrelato, desde sus postulados teóricos y críticos. Es nuestro objetivo en este trabajo exponer algunas de las líneas temáticas y estilísticas que más se desarrollan en sus obras y que hemos sintetizado a partir del concepto de reversibilidad. La aplicación de esta noción deriva sobre todo de la manifestación de mecanismos de subversión que se cumplen en diversas dimensiones. Así, dentro de este concepto se verifican dos movimientos: la reversibilidad basada en la antítesis, donde proliferan los ejercicios que juegan con la dinámica temática, el lenguaje y los ejercicios hipertextuales, y, por otro lado, la reversibilidad centrífuga, que tiende a enseñar, en clave autorreferencial, los andamios de la propia escritura.
Les saisons de Cy Twombly, à la lumière de Renoir
Authors: Mitjans Puebla Marta
Published: March 2021

Cet article porte sur l’analyse iconographique de Four seasons (1993), par l’artiste contemporain Edwin Parker “Cy Twombly” (Cy Twombly, 1928 – 2011), à la lumière de deux créations du maître impressionniste Pierre-Auguste Renoir (1845 – 1919). La vague (1879) et Paysage bords de Seine (1879) sont deux œuvres où Renoir imprime un sceau qui capte l’éphémère à travers la couleur, le mouvement de la lumière et le pleinairisme. Four seasons est une œuvre qui ne peut pas être comprise comme création contemporaine sans étudier l’empreinte de Renoir dans l’abstraction lyrique américaine  ̶  un sceau visible dans la technique, l’usage de la couleur, la thématique et le message de la création. Le besoin de saisir l’harmonie, à travers une création dans laquelle l’image et le texte se mêlent, représente l’évolution de la même œuvre de Renoir dans la contemporanéité : une création où le message unit image et langage, voire un poème visuel.
Sirtuin 1 activated by SRT1460 protects against myocardial ischemia/reperfusion injury
Authors: Zhao Shanjun , Yu Lei
Published: March 2021

BACKGROUND: Ischemia reperfusion usually results in certain degree of damage to the myocardium, which is called myocardial ischemia/reperfusion (I/R) injury. OBJECTIVE: Previous studies have found that Sirt1 plays a critical role in I/R injury by protecting cardiac function. SRT1460 is the activator for Sirt1 that participates in the regulation of various diseases. However, whether SRT1460 has any effects on myocardial I/R injury needs further study. METHODS: The I/R rat model and H/R H9C2 model were established to simulate myocardial I/R injury. The infarct area of the rat heart was examined through TTC staining. The EF and FS of rats were detected through echocardiography. The levels of CK-MB, LDH, MDA, SOD and CK in cardiac tissues, serum or H9C2 cells were measured using commercial kits. Cell viability was assessed through MTT assay. Apoptosis was determined through flow cytometry analysis. Sirt1 expression was measured through western blot. RESULTS: Our work found that SRT1460 reduced the infarct area of the heart induced by myocardial I/R injury. In addition, SRT1460 was confirmed to ameliorate cardiac dysfunction induced by myocardial I/R injury. Further exploration discovered that SRT1460 weakened oxidative stress induced by myocardial I/R injury. Findings from in vitro assays demonstrated that SRT1460 relieved injury of H/R-treated H9C2 cells. Finally, rescue assays proved that Sirt1 knockdown reversed the protective effects of SRT1460 on the injury of H/R-treated H9C2 cells. CONCLUSION: Sirt1 activated by SRT1460 protected against myocardial I/R injury. This discovery may offer new sights on the treatment of myocardial I/R injury.
Impacts of Iron Metabolism Dysregulation on Alzheimer’s Disease
Authors: Jouini Najla , Saied Zakaria , Ben Sassi Samia , Nebli Fatma , Messaoud Taieb , Hentati Faycel , Belal Samir
Published: March 2021

Background: Iron plays an important role in maintaining cell survival, with normal iron trafficking known to be regulated by the ceruloplasmin-transferrin (Cp-Tf) antioxidant system. Disruption to this system is thought to be detrimental to normal brain function. Objective: To determine whether an imbalance of iron and the proteins involved in its metabolism (ceruloplasmin and transferrin) are linked to Alzheimer’s disease (AD) and to the expression of amyloid-beta (Aβ) peptide 1–42 (Aβ1–42), which is a major species of Aβ, and the most toxic. Methods: We evaluated the concentrations of iron, calcium, magnesium, and Aβ1–42 in the cerebrospinal fluid (CSF) of patients with AD and cognitively normal controls. Correlations between the components of the Cp-Tf antioxidant system in plasma were studied to determine the role of peripheral blood in the onset and/or development of AD. We used commercial ELISA immunoassays to measure Aβ1–42, immunoturbidimetry to quantify ceruloplasmin and transferrin, and colorimetry to quantify iron, calcium, and magnesium. Results: We found that the AD group had lower CSF concentrations of Aβ1–42 (p < 0.001) and calcium (p < 0.001), but a higher CSF concentration of iron (p < 0.001). Significantly lower plasma concentrations of ceruloplasmin (p = 0.003), transferrin (mean, p < 0.001), and iron (p < 0.001) were observed in the AD group than in cognitively normal adults. Moreover, we found a strong interdependence between most of these components. Conclusion: Iron dyshomeostasis has a crucial role in the onset of AD and/or its development. Correcting metal misdistribution is an appealing therapeutic strategy for AD.
Characterizing Global and Regional Brain Structures in Amnestic Mild Cognitive Impairment Among Rural Residents: A Population-Based Study
Authors: Li Yuanjing , Cong Lin , Hou Tingting , Chang Liguo , Zhang Chuanchen , Tang Shi , Han Xiaolei , Wang Yongxiang , Wang Xiang , Kalpouzos Grégoria , Du Yifeng , Qiu Chengxuan
Published: March 2021

Background: Structural brain magnetic resonance imaging (MRI) scans may provide reliable neuroimaging markers for defining amnestic mild cognitive impairment (aMCI). Objective: We sought to characterize global and regional brain structures of aMCI among rural-dwelling older adults with limited education in China. Methods: This population-based study included 180 participants (aged≥65 years, 42 with aMCI and 138 normal controls) in the Shandong Yanggu Study of Aging and Dementia during 2014–2016. We defined aMCI following the Petersen’s criteria. Global and regional brain volumes were automatically segmented on MRI scans and compared using a region-of-interest approach. Data were analyzed using general linear regression models. Results: Multi-adjusted β-coefficient (95% confidence interval) of brain volumes (cm3) associated with aMCI was –12.07 (–21.49, –2.64) for global grey matter (GM), –18.31 (–28.45, –8.17) for global white matter (WM), 28.17 (12.83, 44.07) for cerebrospinal fluid (CSF), and 2.20 (0.24, 4.16) for white matter hyperintensities (WMH). Furthermore, aMCI was significantly associated with lower GM volumes in bilateral superior temporal gyri, thalamus and right cuneus, and lower WM volumes in lateral areas extending from the frontal to the parietal, temporal, and occipital lobes, as well as right hippocampus (p < 0.05). Conclusion: Brain structure of older adults with aMCI is characterized by reduced global GM and WM volumes, enlarged CSF volume, increased WMH burden, reduced GM volumes in bilateral superior temporal gyri, thalamus, and right cuneus, and widespread reductions of lateral WM volumes.
Study on torque density enhancement mechanism of elliptic arc multi-disk MRF coupling
Authors: Sun Hui , Zhao Zhangyan , Wang Gongxian , Zhu Chao , Yu Binbin
Published: March 2021

The transfer energy of a magnetorheological fluid (MRF) coupling can be dynamically regulated by changing the MRF mechanical properties of its input and output shafts. In addition, the dynamic characteristics of its drive system can automatically be in the tune with its load characteristics to effectively suppress vibration and shock responses, to achieve overload protection of the system, and to improve its mechanical performance and safety reliability. However, the weak mechanical properties of MRF materials result in so small a coupling torque density that the MRF coupling applications for high-torque transfer is restricted. Thus, to increase the coupling torque density is becoming an urgent key technological challenge in this field. A technique based on shear-pressure mixed mode was proposed here to increase the torque density by utilizing the formation mechanism of MRF arc flux linkage. Futhermore, a new high torque arc multi-disk MRF coupling structure was designed and its corresponding mechanical torque transfer model was established. A FEA electromagnetic simulation was performed to study the distribution of the magnetic field in the MRF chamber under different current excitations. Effects of the key parameters of the elliptical arc on its transfer torque were also investigated. Finally, experimental analysis of the mechanical properties of the elliptical disk MRF coupling was conducted to verify the feasibility of the proposed technique and the validity of the torque transfer model.
Multimodal semantic analysis with regularized semantic autoencoder
Authors: Malik Shaily , Bansal Poonam
Published: March 2021

The real-world data is multimodal and to classify them by machine learning algorithms, features of both modalities must be transformed into common latent space. The high dimensional common space transformation of features lose their locality information and susceptible to noise. This research article has dealt with this issue of a semantic autoencoder and presents a novel algorithm with distinct mapped features with locality preservation into a commonly hidden space. We call it discriminative regularized semantic autoencoder (DRSAE). It maintains the low dimensional features in the manifold to manage the inter and intra-modality of the data. The data has multi labels, and these are transformed into an aware feature space. Conditional Principal label space transformation (CPLST) is used for it. With the two-fold proposed algorithm, we achieve a significant improvement in text retrieval form image query and image retrieval from the text query.
A new ensemble based approach for intrusion detection system using voting
Authors: Bhati Nitesh Singh , Khari Manju
Published: March 2021

With the increase in the amount of data available today, the responsibility of keeping that data safe has also taken a more severe form. To prevent confidential data from getting in the hands of an attacker, some measures need to be taken. Here comes the need for an effective system, which can classify the traffic as an attack or normal. Intrusion Detection Systems can do this work with perfection. Many machine learning algorithms are used to develop efficient IDS. These IDS provide remarkable results. However, ensemble-based IDS using voting have been seen to outperform individual approaches (Support Vector Machine and ExtraTree). Since the Voting methodology is able to work around both, theoretically similar and different classifiers and produce a single classifier based on the majority characteristics, it proved to be better than the other ensemble based techniques. In this paper, an ensemble IDS implementation is presented based on the voting ensemble method, using the two algorithms, Support Vector Machine (SVC) and ExtraTree. The experiment is performed on the KDDCup99 Dataset. The evaluation of the performance of the proposed method is based on the comparison with an unoptimized implementation of the same. The results based on performing the experiment in Python fetched an accuracy of 99.90%.
Classification of arrhythmia’s ECG signal using cascade transparent classifier
Authors: Setiawan Noor Akhmad , Nugroho Hanung Adi , Persada Anugerah Galang , Yuwono Tito , Prasojo Ipin , Rahmadi Ridho , Wijaya Adi
Published: March 2021

Arrhythmia is an abnormality often encountered in patients with cardiac problems. The presence of arrhythmia can be detected by an electrocardiogram (ECG) test. Automatic observation based on machine learning has been developed for long time. Unfortunately, only few of them have capability of explaining the knowledge inside themselves. Thus, transparency is important to improve human understanding of knowledge. To achieve this goal, a method based on cascaded transparent classifier is proposed. Firstly, ECG signals were separated and every single signal was extracted using feature extraction method. Several of extracted feature’s attributes were selected, and the final step was classifying data using cascade classifier which consists of decision tree and the rule based classifier. Classification performance was evaluated with publicly available dataset, the MIT-BIH Physionet Dataset. The methods were tested using 10-fold cross validation. The average of both accuracy and number of rules generated was considered. The best result using rule-based classifier achieves the accuracy and the number of rules 92.40% and 40, respectively. And the best result using cascade classifier achieves the accuracy and the number of rules 92.84% and 80, respectively. As a conclusion, transparent classifier shows a competitive performance with reasonable accuracy compared with previous research and promising in addressing the need for interpretability model.
Wind integrated power system to reduce emission: An application of Bat algorithm
Authors: Venkateswara Rao B. , Devarapalli Ramesh , Malik Hasmat , Bali Sravana Kumar , García Márquez Fausto Pedro , Chiranjeevi Tirumalasetty
Published: March 2021

The trend of increasing demand creates a gap between generation and load in the field of electrical power systems. This is one of the significant problems for the science, where it require to add new generating units or use of novel automation technology for the better utilization of the existing generating units. The automation technology highly recommends the use of speedy and effective algorithms in optimal parameter adjustment for the system components. So newly developed nature inspired Bat Algorithm (BA) applied to discover the control parameters. In this scenario, this paper considers the minimization of real power generation cost with emission as an objective. Further, to improve the power system performance and reduction in the emission, two of the thermal plants were replaced with wind power plants. In addition, to boost the voltage profile, Static VAR Compensator (SVC) has been integrated. The proposed case study, i.e., considering wind plant and SVC with BA, is applied on the IEEE30 bus system. Due to the incorporation of wind plants into the system, the emission output is reduced, and with the application of SVC voltage profile improved.
Speed racing industry information management system based on machine learning and data mining
Authors: Sun Zhuo , Zhang Shuang , Liu Mairu
Published: March 2021

Horse racing is different from other competitive sports. It is an entertainment sport which combines commercialization and sports spirit. Therefore, horse racing has the characteristics of sports and commercial events. In addition, horse racing also has the nature of social welfare, and part of the funds for holding horse racing will be used for fund-raising. Now horse racing has become a complete industry and an important part of the tertiary industry. Horse racing, as a new industry, has developed rapidly. However, there are still some defects in the management of horse racing events. The main problem is the lack of information management of horse racing industry. The introduction of information technology into the management of horse racing industry can realize the efficient management of industrial information, which is more professional and orderly for horse racing.
A novel three layer particle swarm optimization for feature selection
Authors: Qiu Chenye , Liu Ning
Published: March 2021

Feature selection (FS) is a vital data preprocessing task which aims at selecting a small subset of features while maintaining a high level of classification accuracy. FS is a challenging optimization problem due to the large search space and the existence of local optimal solutions. Particle swarm optimization (PSO) is a promising technique in selecting optimal feature subset due to its rapid convergence speed and global search ability. But PSO suffers from stagnation or premature convergence in complex FS problems. In this paper, a novel three layer PSO (TLPSO) is proposed for solving FS problem. In the TLPSO, the particles in the swarm are divided into three layers according to their evolution status and particles in different layers are treated differently to fully investigate their potential. Instead of learning from those historical best positions, the TLPSO uses a random learning exemplar selection strategy to enrich the searching behavior of the swarm and enhance the population diversity. Further, a local search operator based on the Gaussian distribution is performed on the elite particles to improve the exploitation ability. Therefore, TLPSO is able to keep a balance between population diversity and convergence speed. Extensive comparisons with seven state-of-the-art meta-heuristic based FS methods are conducted on 18 datasets. The experimental results demonstrate the competitive and reliable performance of TLPSO in terms of improving the classification accuracy and reducing the number of features.
The Relation between Dividend and Financial Constraints to Firm Value
Authors: Teja Adrian , A Wilson , Chanry Kevin , Kusno John Iwan
Published: March 2021

This study examines the relation between dividends and financial constraints to firm value using publicly traded firms in Indonesia from 2013 to 2017. The very exploration used a repeated cross section regression method to understand monotonic and non-monotonic alliance between dividends and financial constraints to firm value. The non-monotonic correlation measured by dummy variables for 6 dividends categories, i.e. 0 category is defined as firms that did not pay dividends and category 5 is defined as firms that pay dividends with the highest quintile. It is found that monotonic bond lowers the financial constraints that has more important and consistent positive effects on firm value relative to dividends. These findings imply investors to have higher preferences for a firm’s ability to realize good investment projects and provide higher future profits, relative to current profit in the form of dividends. It also found that non-monotonic connection between dividends and firm value and dividends and financial constraints have relatively equal positive effect to firm value.
Preço ao consumidor e o dever de conformação judicial com as políticas públicas de estímulo às atividades econômicas ao modificar ou revisar contratos de consumo
Authors: Neto Henrique Lanza
Published: March 2021

O presente artigo tem por objetivo indicar, em linhas gerais, quais as possíveis variáveis econômicas e concorrenciais utilizadas pelos Poderes Executivo e Legislativo que devem ser conformadas pelo Poder Judiciário nas causas que demandem a modificação ou a revisão de contratos de consumo por desproporcionalidade ou excessiva onerosidade. A análise toma por base a metodologia descritivo-analítica, pura e qualitativa. Sistematiza, em perspectiva multidisciplinar, a interconexão entre conceitos jurídicos e econômicos; parte da abordagem relacionada aos contornos da igualdade material pretendida pelo CDC/90; e examina a necessidade de harmonização das escolhas públicas de incentivo à oferta e à demanda, bem como as limitações quanto à intervenção pública no preço de produtos e serviços privados.
ANALISIS EMOSI DAN SUASANA HATI AKIBAT ANCAMAN PANDEMI COVID-19 PADA PENGAMBILAN KEPUTUSAN MANAJER
Authors: Wijaya Fahd Dzaki
Published: March 2021

Pandemi corona virus disease (Covid-19) menjadi ancaman bagi masyarakat dunia, termasuk di Indonesia, maupun dari perspektif kesehatan maupun ekonomi. Di Indonesia, pemerintah telah membuat berbagai kebijakan untuk mengurangi ancaman dari pandemi ini dan mendorong sektor swasta untuk membuat kebijakan yang tepat seperti bekerja dari rumah dan mematuhi protokol kesehatan.Perusahaan terancam oleh pandemi ini yang memaksa berhenti dan penundaan banyak kegiatan bisnis dari berbagai sektor, sehingga menekan para pengambil keputusan seperti manajer untuk membuat keputusan yang tepat dan membuat perusahaan dapat bertahan dari pandemi ini. Tetapi manajer juga memiliki emosi dan suasana hati yang terpengaruh oleh ancaman Covid-19, sehingga perlu ada cara bagi manajer untuk dapat membuat keputusan berdasarkan informasi. Sebuah studi literatur dilakukan untuk menganalisis emosi dan suasana hati akibat ancaman pandemi Covid-19 pada pengambilan keputusan manajerial, yang dalam penelitian ini akan berguna bagi manajer untuk dapat membuat keputusan berdasarkan informasi di tengah pandemi yang dapat mempengaruhi emosi dan suasana hati mereka.
Pelatihan Pembuatan Media Pembelajaran Berbasis E-Learning bagi Pengajar di Lembaga Pendidikan Luar Sekolah
Authors: Khunaifi A'am Rifaldi , Supriyadi Arif , Suratmoko Bayu
Published: March 2021

The rapid development of information and communication technology or what is known as Information and Communication Technology (ICT) has penetrated various fields of life, including education and teaching. With regard to learning, the use of information technology, in this case, e-learning, is needed not only for educators who are skilled at utilizing technology and technology for the manufacture of teaching materials, but a design is needed to carry out learning effectively. In a learning design (instructional design) there is a process to guide actors (actors) to design, develop, implement e-learning content by utilizing the available e-learning infrastructure and applications. At the next stage in the implementation of e-learning, there is an evaluation stage which is used to revise or adjust to the previous stages. A good educational institution must develop teachers by providing various facilities to support the teaching and learning process. Teachers can replace it with a new method in the form of video or audio that has been combined with the teaching material they want to convey. As technology develops, mobile or smartphone versions of e-Learning can be compatible with the features available in conventional learning so that the quality of content in the form of subject matter can be accessed properly.
Analysis of Factors Affecting Consumer's Decision in Choosing the Digital Fund Wallet
Authors: Herawati Heny
Published: March 2021

This study aims to determine the effect of price, reference groups, and security on consumer decisions in choosing digital fund wallets on three campuses in Jakarta. This study used a sample of 100 respondents and the sampling technique used a simple random sampling technique. The data collection technique used a questionnaire of 43 question items which were assessed on a Likert scale of 1-5 and tested for validity and reliability. The analytical method use, regression analysis, correlation, the test of the coefficient of determination (R2), and t-test. Based on the regression analysis at a significant level of 5%, it shows (1) there is a positive and significant effect of price on consumer decisions in choosing a digital fund wallet, with a rx1y correlation of 0.678; the coefficient of determination R2x1y of 0.460; and sig value 0.000 < 0.05; (2) there is a positive and significant influence of the reference group on consumer decisions in choosing a digital fund wallet, with a rx2y correlation of 0.607; the coefficient of determination R2x2y is 0.368; and sig value 0.000 <0.05; (3) there is a positive and significant security effect on consumer decisions in choosing a digital fund wallet, with a rx3y correlation of 0.746; the coefficient of determination R2x3y of 0.556; and sig value 0.000 < 0.05.
Improvement of the membrane-free electrolysis process of hydrogen and oxygen production
Authors: Rusanov A. V. , Solovey V. V. , Zipunnikov M. M.
Published: March 2021

Renewable energy sources provide an unstable energy flow to the units of an autonomous energy complex. Therefore, in order to use the electrolyzer as an element of the considered complex, it is necessary to determine the optimal range of changes in the current density and evaluate the effect of operating characteristics of the electrolysis process on the evolution of H2 (O2) when the electrolyzer power supply is disconnected for 13 seconds against the background of a continuous base current level. Purpose. The main purpose of the research is to determine the rational range of changes in the current density supplied to a monopolar membrane-free high-pressure electrolyzer, as well as to determine the effect of a discrete current supply on electrochemical reactions during electrolysis. Methodology. Comprehensive studies on the electrochemical processes of water decomposition in alkaline electrolyte with the formation of hydrogen and oxygen in an experimental construction make it possible to cyclically supply power to the electrolyzer with visual control of the considered processes. Findings. The technology of cyclic generation of hydrogen and oxygen, which eliminates the need to use separating ion-exchange membranes, is considered. A rational range of changes in the current density on a membrane-free monopolar high-pressure electrolyzer with the usage of electrodes made of metals with variable valence is established. The influence of the discrete supply of electrical energy to the electrolysis cell is determined depending on the electrochemical reactions occurring on the active iron electrode. Theoretical values of the voltage of the oxidation and reduction of the iron electrode active mass, as well as the voltage on the half-cycle of hydrogen evolution during the electrolysis of water, are calculated. Originality. An increase in the blackout time from 1 to 3 s leads to a corresponding increase in time of the oxidation process on the hydrogen half-cycle by a factor of 2.4. In addition, the total amount of hydrogen (oxygen) released during the corresponding half-cycles remains unchanged and amounts to Practical value. The optimal range of current density for the operation of a membrane-free high-pressure electrolyzer is in the range of 200400 A/m2. Under such conditions, an intense redox process of the iron electrode active mass occurs. Electrical energy consumption in this case is in the range of 3.94.1 kW h/m3. An experimental study on the electrolyzer discrete power supply effect on its ability to generate gas is carried out. This makes it possible to supply electrical energy to the electrolysis cell directly from the primary energy source (sun, wind) as part of the energy technology complex.
Strategic enterprise management based on the modeling of its economic security
Authors: Derevyanko B. V. , Rozhenko O. V. , Khailova T. V. , Hrudnytskyi V. M. , Podskrebko O. S.
Published: March 2021

Purpose. Justification of the methodological approach to the strategic management of reserves for the growth of economic security of enterprises and the provision of appropriate recommendations for this purpose (by the example of METINVEST HOLDING LLC, mining enterprises of the Kryvyi Rih iron-ore basin). Methodology. A system of the following general scientific and special methods was used to achieve the research goal: mathematical and statistical methods to assess the economic security of selected enterprises; methods of correlation and regression analysis to form a system of indicators of the greatest impact on the economic security of the enterprise; econometric modeling methods to predict the value of the integrated indicator of economic security of the enterprises; structured system method to determine the reserves of economic security growth for each business structure; matrix methods to form a strategic field and determine the place of each of the enterprises under study within this field. Findings. The authors have analyzed the dynamics of the economic security of mining enterprises in the Kryvyi Rih iron-ore basin from 2014 to 2018. Multivariate correlation and regression models have been built that allow determining the calculated (maximum possible) value of the integral indicator of the economic security of the enterprises under consideration. After comparing a defined (actual) and calculated value of economic security of the studied elements of the economic security system, its growth reserves for each business structure have been determined. The economic security trend of each mining enterprise in the Kryvyi Rih iron-ore basin until 2021 has been determined, which is characterized by an upward or downward slope of the economic safety values of the enterprises under consideration, predicted by the models and the prospect of achieving the maximum value of it. The resulting characteristics of the economic security value of enterprises predicted based on the trending models make it possible to build a strategic field of basic strategies according to Michael H.Mescon and determine the position of each enterprise within it. Originality. The authors offer a methodological approach to the strategic management of the growth reserves of the economic security of the enterprise, which is defined as a result of the study that is based on the improvement of the instrumental apparatus, which, in contrast to the existing ones, allows synchronizing both temporal and spatial parameters, significantly increasing the efficiency of managerial decision-making. Practical value. The methodological approach to the strategic management of the use of reserves for the growth of the economic security of the enterprise allows synchronizing the strategic management of the enterprise with the modeling of the economic security level. This ensures the economic security of the enterprise to a fuller extent.
Choosing a servicing company’s strategy while interacting with freight owners at the road transport market
Authors: Nugymanova G. , Nurgaliyeva M. , Zhanbirov Zh. , Naumov V. , Taran I.
Published: March 2021

Purpose. To develop the methodology for choosing the strategies of freight forwarding companies in the situation of interaction with freight owners as customers of forwarding services. Methodology. The game-theoretical approach is used to formalize the conflict situation between a freight forwarding company and a cargo owner. A set of services proposed by forwarders is used as the base in order to represent possible strategies of a forwarder as the vector of probabilities that the respective services are provided for a client. The strategies of the cargo owner are represented as a binary variable that shows whether the client uses the provided services or not. The payoff function for a forwarder is defined as the companys profit and the clients payoff function as fee paid for forwarding services. To determine the influence of the demand parameters on the forwarders optimal strategies, the demand for transport services is represented as a flow of requests characterized by two numeric parameters delivery distance and consignment weight. Findings. The conducted experimental studies have shown that as a result of the use of the proposed methodology, the optimal strategy of a forwarding company can always be determined from the payoff matrix. The performed simulation experiment allowed us to state that in most cases the forwarders optimal strategy is mixed (the technological and commercial services should be provided with the given probability while servicing the flow of requests from freight owners). Originality. The studies on the influence of the request flow parameters on the probabilities of choosing the elementary strategies are carried in the paper for the first time. Practical value. The proposed methodology can be used as the basic tool for supporting decisions of freight forwarders while servicing the cargo owners at the market of road freight transportation.
Light-level geolocators reveal spatial variations in interactions between northern fulmars and fisheries
Authors: Dupuis B , Amélineau F , Tarroux A , Bjørnstad O , Bråthen VS , Danielsen J , Descamps S , Fauchald P , Hallgrimsson GT , Hansen ES , Helberg M , Helgason HH , Jónsson JE , Kolbeinsson Y , Lorentzen E , Thompson P , Thórarinsson TL , Strøm H
Published: March 2021

Seabird-fishery interactions are a common phenomenon of conservation concern. Here, we highlight how light-level geolocators provide promising opportunities to study these interactions. By examining raw light data, it is possible to detect encounters with artificial lights at night, while conductivity data give insight on seabird behaviour during encounters. We used geolocator data from 336 northern fulmars Fulmarus glacialis tracked from 12 colonies in the North-East Atlantic and Barents Sea during the non-breeding season to (1) confirm that detections of artificial lights correspond to encounters with fishing vessels by comparing overlap between fishing effort and both the position of detections and the activity of birds during encounters, (2) assess spatial differences in the number of encounters among wintering areas and (3) test whether some individuals forage around fishing vessels more often than others. Most (88.1%) of the tracks encountered artificial light at least once, with 9.5 ± 0.4 (SE) detections on average per 6 mo non-breeding season. Encounters occurred more frequently where fishing effort was high, and birds from some colonies had higher probabilities of encountering lights at night. During encounters, fulmars spent more time foraging and less time resting, strongly suggesting that artificial lights reflect the activity of birds around fishing vessels. Inter-individual variability in the probability of encountering light was high (range: 0-68 encounters per 6 mo non-breeding season), meaning that some individuals were more often associated with fishing vessels than others, independently of their colony of origin. Our study highlights the potential of geolocators to study seabird-fishery interactions at a large scale and a low cost.