bluuebunny/crossref_metadata_2025 huggingface dataset:
THE DEVELOPMENT OF ROLE CHARACTERISTICS OF TEACHERS-PHILOLOGISTS’ COMPETENCE
Authors:   Kryvyi Rih State Pedagogical University, Miroshnik Zoya , Talash Inna ,   Kryvyi Rih State Pedagogical University
Published: January 2021

In the article, role competence is considered as an individual’s capability to assimilate experience obtained from his/her social roles. This developed competence ensures teachers-philologists’ effective professional functioning, because it allows them to integrate different directions and types of pedagogical activities, as well as the acquired pedagogical experience. Language teachers’ role competence should be developed because of the specifics of their professional work, which eventually leads to the rigidity of their psyche, manifested, first of all, according to I. Kolmakova, in a rigid professional-role behavior and personality deformations. In addition, the peculiarities of specialists’ social-cultural environment and preparation to professional work in universities determine the shift of emphasis from psychological-pedagogical activities to purely philological ones. This negatively affects the quality of the specialists’ professional work. In order to emphasize the equivalent role of a teacher’s and a philologist’s positions for fulfillment of professional tasks, we propose to call language teachers as teachers-philologists. The study on the development of role competence components (role variability, flexibility, depth, the ability to role decentration) was carried out in 2019 with participation of general school teachers-philologists. The authors has analyzed its results and revealed certain trends in the respondents’ capability to assimilate role-based experience. The highest indicators for the role competence components were observed at teachers with work experience of 11 to 20 years. This gives grounds to assert that the peculiarities of teachers-philologists’ professional work in general influence positively on the role competence components. At the same time, the indicators of role competence components of teachers-philologists having more than 20 years of work experience were lower; the examined indicators shown by teachers-philologists with 11 -20 years of working experience were rather low in comparison with specialists in other specialties; so we have concluded that this ability is not formed spontaneously only due to the peculiarities of professional work. Thus, it is necessary to organize purposeful and systematic efforts in order to develop role competence. We believe that an effective means for role competence development will be a special program that includes training sessions aimed at researching of specialists’ role repertoire and its development and improvement. The performed research analysis has suggested that role competence development is negatively affected by professional burnout and existing role conflicts. However, this assumption requires additional research, which we plan to carry out in the future.
DMPK is a differentially expressed gene in human metastatic breast cancer, in the brain and in the lymph nodes.
Authors: Mamoor Shahan
Published: January 2021

Metastasis to the brain is a clinical problem in patients with breast cancer (1-3). We mined published microarray data (4, 5) to compare primary and metastatic tumor transcriptomes for the discovery of genes associated with brain metastasis in humans with metastatic breast cancer. We found that dystrophia myotonica protein kinase, encoded by DMPK, was among the genes whose expression was most different in the brain and lymph node metastases of patients with metastatic breast cancer. DMPK mRNA was present at increased quantities in brain metastatic tissues as compared to primary tumors of the breast. Importantly, expression of DMPK in primary tumors was significantly correlated with patient recurrence-free survival in patients with breast cancer. Modulation of DMPK expression may be relevant to the biology by which tumor cells metastasize from the breast to the brain while evading immune clearance in the lymph nodes in humans with metastatic breast cancer.
TOR2A is a differentially expressed gene in brain metastatic human breast cancer.
Authors: Mamoor Shahan
Published: January 2021

Metastasis to the brain is a clinical problem in patients with breast cancer (1-3). We mined published microarray data (4, 5) to compare primary and metastatic tumor transcriptomes for the discovery of genes associated with brain metastasis in humans with metastatic breast cancer. We found that torsin family 2, member A, encoded by TOR2A, was among the genes whose expression was most different in the brain metastases of patients with metastatic breast cancer as compared to primary tumors of the breast4, as well as in primary tumors of the breast when compared to normal breast tissue5. TOR2A mRNA was present at increased quantities in brain metastatic tissues as compared to primary tumors of the breast. Importantly, expression of TOR2A in primary tumors was significantly correlated with patient recurrence-free survival. Modulation of TOR2A expression may be relevant to the biology by which tumor cells metastasize from the breast to the brain in humans with metastatic breast cancer.
DDX54 is a differentially expressed gene in human metastatic breast cancer, in the brain and in the lymph nodes.
Authors: Mamoor Shahan
Published: January 2021

Metastasis to the brain is a clinical problem in patients with breast cancer (1-3). We mined published microarray data (4, 5) to compare primary and metastatic tumor transcriptomes for the discovery of genes associated with brain metastasis in humans with metastatic breast cancer. We found that the DEAD-box helicase 54, encoded by DDX54, was among the genes whose expression was most different in the brain and lymph node metastases of patients with metastatic breast cancer. DDX54 mRNA was present at increased quantities in brain metastatic tissues as compared to primary tumors of the breast. Importantly, expression of DDX54 in primary tumors was significantly correlated with patient recurrence-free survival in patients with breast cancer. Modulation of DDX54 expression may be relevant to the biology by which tumor cells metastasize from the breast to the brain while evading immune clearance in the lymph nodes in humans with metastatic breast cancer.
Value network engagement and effects of memory-related processing during encoding and retrieval of value
Authors: Conner Lindsay B , Horta Marilyn , Ebner Natalie C. , Lighthall Nichole Renee
Published: January 2021

Decision makers rely on episodic memory to calculate choice values in everyday life, yet it is unclear how neural mechanisms of valuation differ when value-related information is encoded versus retrieved from episodic memory. The current fMRI study compared neural correlates of value while information was encoded versus retrieved from memory. Scanned tasks were followed by a behavioral episodic memory test for item-attribute associations. Our analyses sought to (i) identify neural correlates of value that were distinct and common across encoding and retrieval, and (ii) determine whether neural mechanisms of valuation and episodic memory interact. The study yielded three primary findings. First, value-related activation in the fronto-striatal reward circuit and posterior parietal cortex was comparable across valuation phases. Second, value-related activation in select fronto-parietal and salience regions was significantly greater at value retrieval than encoding. Third, there was no interaction between neural correlates of valuation and episodic memory. Taken with prior research, the present study indicates that fronto-parietal and salience regions play a key role in retrieval-dependent valuation and context-specific effects likely determine whether neural correlates of value interact with episodic memory.
A Sociology of Archetypes
Authors: Sosteric Mike
Published: January 2021

Archetypes inform our self-image, influence how we see the world, and direct many of the actions we take as we navigate and create our realities. According to psychologist Carl G. Jung, archetypes are powerful determines of human experience and human psychological and political realities. As such, they hold significant spiritual, psychological, and sociological interest. There has been sustained interest from those interested in the psychology and spirituality of archetypes; however to date sociologists have remained largely aloof. Hoping to overcome this lacuna, this paper explores the sociology of archetypes by examining the emotional and psychological power of archetypes and by demonstrating how powerful archetypes become situated in elite “spiritual” discourses designed not in the service of human health and development, but in the service of the political and economic agenda of societal and world elites.
Cultural Capital and Educational Performance of Brahman/Chhetri Students
Authors: Simkhada Sharad Chandra
Published: January 2021

Why Brahman/Chhetri students are high achievers in secondary education in Nepal is rarely analyzed. For their educational success, people attribute to their cultural capital. A qualitative method was employed to assess whether the assumption is valid or not. In the course of assessment, researcher generated information from secondary and primary sources and analyzed them. The findings show that the Brahman/Chhetris are rich in cultural capital, which is instrumental for their better performance in formal education. However, empirical evidence has led the researcher that the argument is valid partly. Due to globalization combined with other factors such as class, education, and growing cultural exchange, the influence of cultural capital to their educational achievement has been found weak. Therefore, the stereotypical generalization is not necessarily true at present, among the research participants.
PENGEMBANGAN MODUL BERBASIS HOTS PADA TEMA 6 MATERI MEMBANDINGKAN SIKLUS MAKHLUK HIDUP KELAS IV SEKOLAH DASAR
Authors: Purwanti Siwi , Anggraini Putri Riri Zulia
Published: January 2021

Based on the observations and the interviews with fourth-grade teachers of Muhammadiyah Semoya Elementary School, there were limitations to the HOTS-based module media on the sixth theme of learning 1:Cita-citaku (my future goals); first sub-theme: Aku dan Cita-citaku (me and my future goals). The students found it challenging to understand the material on comparing the cycles of living things. This study aimed to develop and determine the High Order Thinking Skill (HOTS) of students in the Natural Science subject (IPA) to compare the cycle of living things for grade IV of elementary school. The type of research used in this study was Research and Development (R&D). The development steps used was Sugiyono's theoretical model (2018: 773). as for the research stages: potentials and problems, data collection, product design, design of validation, design of revision, product manufacturing, and product of revision. Data collection techniques were interviews, observation, and expert assessment questionnaires. Data analysis techniques used were quantitative data and qualitative data. The results showed that media experts' feasibility assessment was 85%, material experts 84%, learning experts73%.In the quantitative assessment, it was in a very feasible category. Following the suggestions and criticisms of media experts, material experts, and learning experts, HOTS-based module media was suitable for learning-medium in fourth-grade elementary school students' teaching and learning process.
Students’ view of flipped classroom in physics’ class
Authors: Putri E. F. , Purwaningsih E.
Published: January 2021

The flipped classroom is one of the strategies and learning models that can improve student learning outcomes. Recent research has been done to see the strengths, weaknesses, and effects of the flipped classroom on learning, but not much research has been done to see students' responses to the application of the flipped classroom in physics class in senior high. The purpose of this study is to see how students respond to the application of flipped classrooms in physics learning at the high school level. The phenomenological research design is used to examine the factors that influence research. The result showed that teachers need to be consider of several things that impact the learning process.
Cálculo de la integral escalar a un lazo A(m2) mediante el teorema del residuo
Authors: García-Aguilar J. D. , Gómez-Izquierdo J. C.
Published: January 2021

El cálculo de correcciones radiativas, en la fenomenología de la física de partículas elementales, ha permitido realizar grandes predicciones en las observables del llamado Modelo Estándar, la cual están en gran acuerdo con las mediciones experimentales de distintos colisionadores de partículas. Este es un trabajo pedagógico en la cual se calcula la integral escalar a un lazo $A\lr{m^2}$, que aparece en los cálculos de correcciones radiativas, en el esquema de regularización dimensional. Como resultado principal, se presenta una forma nueva (no existente en la literatura) de calcular la integral escalar mediante el Teorema del Residuo de variable compleja. Adicionalmente se demuestra mediante propiedades de la función Gamma la equivalencia de ambos procedimientos.
The misconceptions about the calculation of light bulb resistance in specialized school
Authors: Oghlu Sharifov G. Movsum
Published: January 2021

The paper deals with the study of the resistance of incandescent light bulbs. It has been established that the temperature dependence of resistance for these types of lamps always manifests itself in school experiments. Therefore, students in specialized school should be taught a systematic comparison of resistance in resistors and lamps in circuits in term of didactic principles and be given a detailed explanation of the different factors that occurred in lamp circuits and were mistakenly understood as equipment errors.
Harmonic oscillator Brownian motion: Langevin approach revisited
Authors: Contreras-Vergara O. , Lucero-Azuara N. , Sánchez-Salas N. , Jiménez-Aquino J. I.
Published: January 2021

The original strategy applied by Langevin to Brownian movement problem is used to solve the case of a free particle under a harmonic potential. Such straightforward strategy consists in separating the noise termin the Langevin equation in order to solve a deterministic equation associated with the Mean Square Displacement (MSD). In this work, to achieve our goal we first calculate the variance for the stochastic harmonic oscillator and then the MSD appears immediately. We study the problem in the damped and lightly damped cases and show that, for times greater than the relaxation time, Langevin's original strategy is quite consistent with the exact theoretical solutions reported by Chandrasekhar and Lemons, these latter obtained using the statistical properties of a Gaussian white noise. Our results for the MSDs are compared  with the exact theoretical solutions as well as with the numerical simulation.
Canadian Theatre Made for Black Women
Authors: Keleta-Mae Naila
Published: January 2021

For close to two decades Trey Anthony has carved out a successful career as a published and produced playwright in Canada in a national theatre landscape where few playwrights enjoy sustained success. This is, in part, because Anthony is also an entrepreneur who identified Black women in Canada as a financially viable and lucrative target market and she has consistently self-produced content that is geared specifically to them. This article begins with the production history, critical response, and box office response to Anthony’s play How Black Mothers Say I Love You. It continues with an analysis of the play’s content and characters as representative of staging Black female life and it concludes with a contemplation of what Anthony’s successful cultivation of a Black female audience in Canada suggests about Canadian theatre.
Pojmovno određenje identitetske siluete grada
Authors: Mravunac Ines , Šmit Krunoslav
Published: January 2021

Istraživanje je usmjereno na utvrđivanje, prepoznavanje vrijednosti i značenja identitetske siluete grada sagledane iz urbanističko-arhitektonskog motrišta. Na temelju komparativnog pregleda literature i dokumentacijskih izvora postavlja se pojmovno određenje siluete grada u kontekstu pojmova identitetska slika grada, panorama i vizura grada te se predlaže formiranje pojma koji objedinjuje njihova značenja: panoramska slika grada.
Creating a professional culture for documenting future social workers
Authors:   National University of Life and Environmental Scienсes of Ukraine, Vlasenko К. O.
Published: January 2021

The article reveals the features of the professional culture of documenting future social workers. The specifics of the formation of a culture of documentation in connection with the significant dynamic development of professional activities of social workers are determined and justified.
The Other Children of the French Republic
Authors: Fillod-Chabaud Aurélie
Published: January 2021

For several years now, orphaned children have been arriving from Algeria and Morocco for legal collection by families residing on French territory. While most Muslim countries prohibit full adoption, they do allow forms of delegation of parental authority (kafala) that enable abandoned children living in orphanages to be cared for by families. Due to the prohibitive status of adoption in Morocco and Algeria and the fact that France is required to adhere to the regulations of those countries, these children arrive in France without having either the possibility of being naturalized or adopted. This article interrogates the particular reception reserved for these children by French institutions by analyzing the reasons for the kafala system’s relative obscurity within the French field of adoption, the measures deployed by departmental councils to assess candidates for kafala, and, finally, the alternative strategies such families use to adapt to French rule.
SUBTOXIC EFFECTS OF SODIUM FLUORIDE ON THE ULTRASTRUCTURE OF PITUITARY GLAND IN RATS
Authors: Kolisnyk I.L.
Published: January 2021

The study aimed at investigating the morphofunctional state of the pituitary gland in white rats under the subtoxic exposure to sodium fluoride. Mature male rats (N = 17), weighing 130-150 g, were intragastrically administered with aqueous solutions of sodium fluoride in a dose of 1/10 LD50 ranged from 20 mg / kg of body weight. The duration of the subacute experiment was 60 days. To assess the morphological rearrangement at the subcellular level of organization of the pituitary gland, electron microscopy was performed. The microscopic study revealed changes in the submicroscopic architecture resulted from dystrophic processes caused by the subtoxic exposure to sodium fluoride. Prolonged sodium fluoride intoxication led to a number of changes in the ultrastructure of the pituitary gland, manifested by the development of intracellular oedema, swelling of mitochondria, changes in the density of their matrix, partial reduction and loss of cristae, vacuolization and expansion of the cisterns of the granular endoplasmic reticulum, an increase in the number of primary lysosomes, in the redistribution of chromatin nucleus and a decrease in the number of ribosomes and glycogen granules. Hemocapillaries showed oedema of endothelial cells, uneven thickening of the basement membrane, vasodilatation with the development of stasis and sludge of erythrocytes. As in the vessels of the hypothalamus, the presence of fibrin and a significant number of platelets has been found. These changes indicate a disruption of bioenergetics associated with the mitochondrial apparatus and the development of hypoxic processes, which lead to a decrease in the activity of redox reactions occurring at the level of intracellular membranes and organelles.
ORGANIZATION OF STUDENTS’ INDEPENDENT ENGLISH LANGUAGE LEARNING IN THE COURSE OF PREPARATION TO SUBTEST OF LICENSING EXAMINATION «KROK 1. DENTISTRY»
Authors: Efendiieva S. M. , Havrylieva K. H. , Buhaenko K. S.
Published: January 2021

Over two decades Ukrainian system of medical professional training has been providing a single pathway for primary licensure of all graduates of medical schools by licensing examinations «Krok 1», «Krok 2» and «Krok 3». Since their inceptions, the examinations provide the valid and reliable independent assessment of medical examinations in order to demonstrate they have knowledge and clinical skills for the unsupervised general practice of medicine, and thus, to grant the primary license to practice medicine. The aim of this study is to analyze ways of the organization of student’s self-learning at the Department of Foreign Languages with Latin and Medical Terminology, Ukrainian Medical Stomatological Academy, which will promote the confidence in own English language command and ensure demonstrating high performance of English subtest «Krok 1». Independent learning using additional texts should help students, concerning with previously studied elements of terminology, lexis and grammar, to figure out faster phrases and constructions in texts based on the contex and extra linguistic clues.

The analysis of the factors influencing the students’ performance when doing the Krok tests, we have found the guided language exposure and scheduled amount of time for independent work according to the curriculum can help to overcome typical linguistic obstacles. Moreover, the English language instructors elaborated the questionnaire and surveyed the students to identify self-learning routine peculiarities, resources commonly used for self-training to licensing examination, which are the most effective from their point of view. The study included 155 third year dental students (2019-2020 academic year). The students actively use mobile applications from the playmarket, namely K-test, which they can use for independent practice at individual pace. Computer technologies can significantly improve the efficiency of foreign language teaching and learning and help us in organizing independent work of the students. According to result obtained, testkrokorg.ua internet resource ranks the second position. 19.35% of students chose this site as it gives an opportunity to check the knowledge, to get graded and to get the right answers. 17.41% of the respondents used testcentr.org.ua by reviewing and uploading Krok test booklets. 11.61% of the students used social network groups, which post materials, news and results to licensing examinations. 9.67% of students are found to prefer booklets; methodical instructions for students’ training that are on the site of our department. 3.2% of the responders suggest that lifehacks in YouTube contains the experience of bloggers and due to them the youth can learn new things. The obtained results have shown that the computer appliances are of great recourses for independent learning when used purposefully and guided by the instructors.
A bone substitute composed of polymethyl-methacrylate bone cement and Bio-Gene allogeneic bone promotes osteoblast viability, adhesion and differentiation
Authors: Wang Zhikun , Li Zaixue , Zhang Xiansen , Yu Yingfeng , Feng Qingyu , Chen Jianting , Xie Wenwei
Published: January 2021

BACKGROUND: Increasing reports on new cement formulations that address the shortcomings of PMMA bone cements and various active components have been introduced to improve the biological activity of PMMA cement. OBJECTIVE: Evaluating the biological properties of PMMA cements reinforced with Bio-Gene allogeneic bone. METHODS: The MC3T3-E1 mouse osteoblast-like cells were utilized to determine the effects of Bio-Gene + PMMA on osteoblast viability, adhesion and differentiation. RESULTS: The combination of allogeneic bone and PMMA increased the number of adherent live cells compared to both control group and PMMA or Bio-Gene group. Scanning electron microscopy observed that the number of cells adhered to Bio-Gene + PMMA was larger than Bio-Gene and PMMA group. Compared with the control and PMMA or Bio-Gene group, the level of ALP and the number of calcium nodules after osteoinduction was remarkably enhanced in Bio-Gene + PMMA group. Additionally, the combination of Bio-Gene and PMMA induced the protein expression of osteocalcin, osterix and collagen I. CONCLUSION: The composition of PMMA and allogeneic bone could provide a more beneficial microenvironment for osteoblast proliferation, adhesion and differentiation. PMMA bone cement reinforced with Bio-Gene allogeneic bone may act as a novel bone substitute to improve the biological activity of PMMA cement.
Acute effect of strength training on pain in women with fibromyalgia: A brief report
Authors: Andrade Alexandro , de Azevedo Klumb Steffens Ricardo , Sieczkowska Sofia Mendes , Coimbra Danilo Reis , Vilarino Guilherme Torres
Published: January 2021

OBJECTIVE: The aim was to analyze the effect of one session and three sessions of strength training (ST) on pain in women with fibromyalgia (FM). METHOD: Twenty-three women with FM performed three sessions of ST for a week. Each training session worked the main muscle groups and lasted 60 min. Three sets of 12 repetitions were performed with 1 min intervals in between. The load was increased based on the perception of subjective effort of each patient. Pain intensity was evaluated immediately after the first and third sessions using a Fischer digital algometer. RESULTS: After the first ST session, pain reduction was observed. No significant differences were found in pain thresholds on the baseline versus the third session. The analysis of MBI demonstrated that the ST does not worsen patients’ pain, indicating a 52.2% trivial effect and a 39.1% beneficial effect. CONCLUSION: Our results suggest that there is no harmful effect on the pain of women with FM after an acute session of ST. We emphasize that despite the promising results, more studies on the subject are needed to help understand pain in patients with FM.
Development, validation, and application of UPLC-PDA method for anthocyanins profiling in Vaccinium L. berries
Authors: Vilkickyte Gabriele , Motiekaityte Vida , Vainoriene Rimanta , Liaudanskas Mindaugas , Raudone Lina
Published: January 2021

BACKGROUND: Anthocyanins are one of the key factors contributing to the quality and biological activities in various berries. Particular attention was devoted to Vaccinium L. berries, because of being commonly consumed in daily life and providing a large potential for the development of new pharmaceutical applications. OBJECTIVE: The present work aimed at establishing a novel UPLC-PDA method for profiling anthocyanins in berries and evaluating their distribution in cultivated lingonberries. METHODS: The method was developed and validated using bilberries (Vaccinium myrtillus L.), cranberries (Vaccinium macrocarpon Ait.), and lingonberries (Vaccinium vitis-idaea L.) matrices. Anthocyanins content variation was analyzed among 7 different cultivars and 1 infraspecific taxon of lingonberries. RESULTS: The proposed method ensured the separation of 20 compounds, including major and minor anthocyanins and their aglycones, in bilberries, 15 in cranberries, and 9 in lingonberries, during 12 min analysis. Bilberry matrix was distinguished by the most complex profile and the presence of delphinidin and petunidin, which were not identified either in cranberries or lingonberries. Cranberry anthocyanins consisted mainly of the 3-galactosides of cyanidin and peonidin, whereas lingonberry anthocyanins included cyanidin and its glycosides with just traces of other anthocyanins. Obtained anthocyanins fingerprinting results have guidance function in practice and demonstrate valuable chemophenetic information for studied Vaccinium berries. All determined method validation values were considered to be acceptable. Variation analysis of anthocyanins levels among cultivated lingonberries suggested genetic diversity and because of the highest anthocyanins content—the superiority of Russian cultivars (‘Kostromička’ and ‘Rubin’). To the best of our knowledge, this is the first comprehensive report on the anthocyanins of certain lingonberry cultivars. CONCLUSIONS: This study resulted in the rapid, simple, and validated method, which was shown to be applicable and convenient for routine analysis and authentication of Vaccinium berry samples.
Research of the safety path of colleges and universities laboratory basing on the analysis of grey correlation degree
Authors: Chen Lili
Published: January 2021

These years, the laboratory safety situation in Colleges and universities has improved, but the safety problem still needs to be improved. Based on the research basis of previous literature, this paper extracts the causes of laboratory accidents in Colleges and universities in the past six years, uses the grey system theory to carry out correlation analysis, sorts the correlation degree of influencing factors of laboratory safety behavior, and through empirical analysis, the organization system, safety education, laboratory environment management, foundation safety ,professional safety show a decreasing relationship in the influencing factors of laboratory safety. On the basis of this conclusion, the safety management path of related laboratories is proposed: Improve the laboratory organization and management system; carry out safety education regularly; strict professional operation process; orderly laboratory environment; effective basic safety management. These path studies have positive practical significance for laboratory safety management.
Detection algorithm of ultra-high harmonics in distribution networks
Authors: Shen Xin , Shu Hongchun , Cao Min , Qian Junbing , Pan Nan
Published: January 2021

Power quality of distribution network is an emerging issue due to rapid increase in usage of non-linear loads on the one hand and utilization of sensitive devices on the other hand. Especially, harmonic emission is an important concern in both electric utilities and end users of electric power. Therefore, an accurate and rapid harmonic analysis method is of interest. New technologies have enabled the investigation of electricity consumption mode at an unprecedented scale and in multiple dimensions. However, an effective method that can capture the complexity of all the factors relevant to understanding a phenomenon such as ultrahigh harmonics (2–15 kHz). How to detect the super high order harmonic accurately has become the premise and foundation of the study of super high order harmonic. The key challenge in developing such approaches is the identification of effective models to provide a comprehensive and relevant systems view. An ideal method can identify super high harmonics and predict outcomes, by measured data across several dimensions variation. In this paper, the data integration, current methods and available implementation is discussed. Finally, the current challenges in integrative methods is discussed.
Influence of distributed power supply in distributed power distribution network
Authors: Shen Xin , Shu Hongchun , Cao Min , Pan Nan , Qian Junbing
Published: January 2021

In distribution networks with distributed power supplies, distributed power supplies can also be used as backup power sources to support the grid. If a distribution network contains multiple distributed power sources, the distribution network becomes a complex power grid with multiple power supplies. When a short-circuit fault occurs at a certain point on the power distribution network, the size, direction and duration of the short-circuit current are no longer single due to the existence of distributed power, and will vary with the location and capacity of the distributed power supply system. The change, in turn, affects the current in the grid, resulting in the generation and propagation of additional current. This power grid of power electronics will cause problems such as excessive standard mis-operation, abnormal heating of the converter and component burnout, and communication system failure. It is of great and practical significance to study the influence of distributed power in distributed power distribution networks.
Study on atomization particle size characteristics of two-phase flow nozzle
Authors: Lilan Haoqi , Qian Junbing , Pan Nan
Published: January 2021

Nozzle spray atomization is widely used in industrial and agricultural production processes and is a very complicated physical change. The spray atomization of the nozzle is a process in which the droplets are continuously broken into finer particles under the action of force, in order to study the effect of nozzle atomization, that is, droplet size distribution characteristics. The experimental average mathematical model of droplet size distribution was established by introducing Sauter Mean Diameter (SMD). The droplet size distribution in the atomization field of the nozzle is studied by simulation. In the experimental study, the high-speed camera, external mixing air atomizing nozzle platform experimental device and image processing were used, and the atomization field was divided into multiple observation areas. Through the measurement of several local observation areas, the droplet size distribution of the whole atomization field is constructed. It provides a reference for the study of the atomization field of the nozzle and a basis for the intuitive understanding of the droplet size distribution in the atomization field of the nozzle. The effective atomization area of the nozzle atomization was selected to study the influence of the liquid flow rate, the liquid temperature and the nozzle pressure on the atomized particle size distribution of the externally mixed atomizing nozzle. The internal law is obtained, which provides a basis and reference for effectively controlling the atomization effect in the atomization field.
Intelligent optimization in model-predictive control with risk-sensitive filtering
Authors: Chen Yenming J. , Tsai Jinn-Tsong , Huang Wei-Tai , Ho Wen-Hsien
Published: January 2021

The uncertainty issue in real-work optimization affects the level of optimization significantly. Because most future uncertainties cannot be foreseen in advance, the optimization must take the uncertainties as a risk in an intelligent way in the process of computation algorithm. Based on our risk-sensitive filtering algorithm, this study adopts a model-predictive control to construct a risk-averse, predictable model that can be used to regulate the level of a real-world system. Our model is intelligent in that the predictive model needs not to identify the system parameters in advance, and our algorithm will learn the parameters through data. When the real-world system is under the disturbance of unexpected events, our model can still maintain suitable performance. Our results show that the intelligent model designed in this study can learn the system parameters in a real-world system and minimize unexpected real-world disturbances. Through the learning process, our model is robust, and the optimal performance can still be retained even the system parameters deviate from expected, e.g., material shortage in a supply chain due to earthquake. When parameter error risks occur, the control rules can still drive the overall system with a minimal performance drop.
Fuzzy emotional evaluation of color matching for aircraft cockpit design
Authors: Chen Yanhao , Yu Suihuai , Chu Jianjie , Yu Mingjiu , Chen Dengkai
Published: January 2021

Numerous human factors need to be considered in the analysis and design of aircraft cockpits. The investigation of cockpit color patterns and the design of matched color schemes are particularly important. In this paper, we propose a fuzzy-logic-based emotional evaluation scheme for color pattern design in aircraft cockpits. Color pattern samples were collected and analyzed to construct a color library for cockpit color matching. Color scheme groups were accordingly redesigned and visualized. Based on fuzzy-set theory, the Kansei engineering model was thus used to evaluate the emotional image of the color schemes, and rank them in terms of priority. A support vector machine was trained to construct a comprehensive intelligent color evaluation system. After training and validating the evaluation model, accurate emotional evaluation of color matching schemes could be achieved. Thus, the proposed system enables the extraction, mapping and evaluation of cockpit color matching schemes, and can be used in color scheme design for other cabins.
Recaptured image detection through multi-resolution residual-based correlation coefficients
Authors: Zhu Nan , Yin Yuting
Published: January 2021

With the great development of image display technologies and the widespread use of various image acquisition device, recapturing high-quality images from high-fidelity LCD (liquid crystal display) screens becomes relatively convenient. These recaptured images pose serious threats on image forensic technologies and bio-authentication systems. In order to prevent the security loophole of image recapture attack, we propose a recaptured image detection method based on multi-resolution residual-based correlation coefficients. Specifically, we first classify the divided image blocks into three categories according to their content complexity. Then, for each classified block, sharpness degree is used as metric to select the local representative block. Finally, pixel-wise correlation coefficients in the residual of the local representative blocks are adopted as features for training and testing. Single database experiments demonstrate that our proposed method not only performs very close to the state-of-the-art methods on relative low-quality NTU-ROSE and BJTU-IIS databases, but also improves the performance on the most difficult-to-detect ICL-COMMSP database obviously, which verifies the effectiveness of the proposed multi-resolution strategy and the used residual-based correlation coefficients. Besides, mixed database experiments verify the superiority of the generalization ability of our proposed method. Moreover, it is robust to JPEG compression.
A LSGDM method based on social network and IVIFN’s geometric characteristics for evaluating the collaborative innovation problem1
Authors: Zhang Dongli , Yang Yanbo , Wang Weican , You Xinshang
Published: January 2021

During the development of regional economy, introducing collaborative innovation is an important policy. Constructing a scientific and effective measurement for evaluating the collaborative innovation degree is essential to determine an optimum collaborative innovation plan. As this problem is complex and has a long-lasting impact, this paper will propose a novel large scale group decision making (LSGDM) method both considering decision makers’ social network and their evaluation quality. Firstly, the decision makers will be detected based on their social connections and aggregated into different subgroups by an optimization algorithm. Secondly, decision makers are weighted according to their important degree and decision information, where the information is carried by interval valued intuitionistic fuzzy number (IVIFN). During the information processing, IVIFN is put in rectangular coordinate system considering its geometric meaning. And some related novel concept are given based on the barycenter of rectangle region determined by IVIFN. Meanwhile, the criteria’s weights are calculated by the accurate degree and deviation degree. A classical example is used to illustrate the effect of weighting methods. In summary, a large scale group decision making method based on the geometry characteristics of IVIFN (GIVIFN-LSGDM) is proposed. The scientific and practicability of GIVIFN-LSGDM method is illustrated through evaluating four different projects based on the constructed criteria system. Comparisons with the other methods are discussed, followed by conclusions and further research.
Postprandial Increase in Mesenteric Blood Flow is Attenuated in Parkinson’s Disease: A Dynamic PC-MRI Study
Authors: Siebner Thomas Hartwig , Fugl Madelung Christopher , Bendtsen Flemming , Løkkegaard Annemette , Hove Jens Dahlgaard , Siebner Hartwig Roman
Published: January 2021

Background: Gastrointestinal dysfunction and related clinical symptoms are common in Parkinson’s disease (PD), but the underlying mechanisms are still poorly understood. Objective: In this study, we investigated how PD affects the postprandial vascular response in the splanchnic circulation. Methods: 23 patients with PD in the “ON-medication” state and 23 age- and sex-matched healthy control participants underwent serial phase-contrast magnetic resonance imaging (PC-MRI) to measure the postprandial blood flow response in the superior mesenteric artery (SMA). Participants ingested a standardized liquid test meal (∼400 kcal) and underwent four PC-MRI runs within the following hour. Each PC-MRI run consisted of six consecutive measurements of SMA blood flow. Results: In both groups, standardized food intake triggered an increase of blood flow in the SMA, but absolute and relative increases in blood flow were attenuated in patients compared to the control group (p < 0.001). While baseline blood flow in the SMA was comparable in both groups, the postprandial maximum blood flow was attenuated in patients (p = 0.03). The temporal dynamics of the postprandial blood flow did not differ between groups. Postprandial SMA blood flow increase in patients correlated neither with subjective reports of non-motor symptoms or upper gastrointestinal complaints, nor with levodopa equivalent daily dose or disease duration. Blood glucose measurements in between the PC-MRI runs showed a smaller postprandial increase in blood glucose in the patient group (p = 0.006). Conclusion: This study provides first-time evidence that patients with PD have an attenuated postprandial blood flow response in the SMA, indicating an impaired functional regulation of gastrointestinal perfusion in response to food intake in PD.
Behavioral flexibility in Belief-Desire- Intention (BDI) architectures
Authors: Saadi Adel , Maamri Ramdane , Sahnoun Zaidi
Published: January 2021

The Belief-Desire-Intention (BDI) model is a popular approach to design flexible agents. The key ingredient of BDI model, that contributed to concretize behavioral flexibility, is the inclusion of the practical reasoning. On the other hand, researchers signaled some missing flexibility’s ingredient, in BDI model, essentially the lack of learning. Therefore, an extensive research was conducted in order to extend BDI agents with learning. Although this latter body of research is important, the key contribution of BDI model, i.e., practical reasoning, did not receive a sufficient attention. For instance, for performance reasons, some of the concepts included in the BDI model are neglected by BDI architectures. Neglecting these concepts was criticized by some researchers, as the ability of the agent to reason will be limited, which eventually leads to a more or less flexible reasoning, depending on the concepts explicitly included. The current paper aims to stimulate the researchers to re-explore the concretization of practical reasoning in BDI architectures. Concretely, this paper aims to stimulate a critical review of BDI architectures regarding the flexibility, inherent from the practical reasoning, in the context of single agents, situated in an environment which is not associated with uncertainty. Based on this review, we sketch a new orientation and some suggested improvements for the design of BDI agents. Finally, a simple experiment on a specific case study is carried out to evaluate some suggested improvements, namely the contribution of the agent’s “well-informedness” in the enhancement of the behavioral flexibility.
Parallel and fault-tolerant k-means clustering based on the actor model
Authors: Taamneh Salah , Qawasmeh Ahmad , Aljammal Ashraf H.
Published: January 2021

K-means algorithm is a well-known unsupervised machine learning tool that aims at splitting a given dataset into a fixed number of clusters via iterative refinement approach. Running such an algorithm on today’s datasets that are characterized by its high multidimensionality and huge size requires using fault-tolerance mechanisms to mitigate the impact of possible failures. In this paper, we propose an actor-based implementation of k-means algorithm. The algorithm was made fault-tolerant by periodically saving the centroids into a stable storage during the failure-free execution, and restarting from the last saved centroids upon a failure. This was implemented in two different ways: optimistic checkpointing (blocking) and pessimistic checkpointing (non-blocking). The actor-based k-means algorithm was evaluated on a machine with eight cores. The experiments showed that the proposed algorithm scales very well as the number of workers increases, and can be up to ∼ 2x faster than a Java-thread-based implementation of k-means algorithm. The results also showed that the optimistic algorithm outperformed the pessimistic one, specifically, in the presence of competing I/O operations. Several failures were forced to occur during the execution to evaluate the performance of the fault-tolerant implementations. The experiments showed that the average amount of lost work ranged from 3–6%.
Interventions to increase personal protective behaviours to limit the spread of respiratory viruses: A rapid evidence review and meta-analysis
Authors: Perski Olga , Szinay Dorothy , Corker Elizabeth , Shahab Lion , West Robert , Michie Susan
Published: January 2021

PURPOSE: Changing human behaviour is critical for stopping the spread of respiratory viruses, including SARS-CoV-2. This includes increasing personal protective behaviours: we need evidence to inform how to achieve this. We aimed to evaluate the acceptability, practicability, effectiveness, affordability, spill-over effects and equity impact of interventions to increase personal protective behaviours to limit the spread of respiratory viruses.

METHODS: We used standard best practice for rapid evidence reviews. We searched Ovid MEDLINE and Scopus to identify interventions designed to change six personal protective behaviours: hand hygiene; avoiding touching the ‘T-Zone’; catching droplets in tissues; face mask use; disinfecting surfaces; and maintaining physical distancing. Primary research studies conducted in adults or children with active or passive comparators were included. A narrative synthesis and random-effects meta-analyses were conducted.

RESULTS: We identified 39 studies conducted across 15 countries. Interventions targeted hand hygiene (n = 30) and/or face mask use (n = 12) and used two- or three-arm study designs with passive comparators. Interventions were typically delivered face-to-face and included a median of three behaviour change techniques. Interventions to increase hand hygiene had a medium, positive effect (_d_ = 0.62, 95% CI = 0.43-0.80, _p _< .001, I2 = 81.2%). Interventions targeting face mask use had mixed results, with an imprecise pooled estimate (OR = 4.14, 95% CI = 1.24-13.79, _p _< .001, I2 = 89.67%). Between-study heterogeneity was high.

CONCLUSIONS: We found positive effects of interventions targeting hand hygiene, with unclear results for interventions targeting face mask use.