bluuebunny/crossref_metadata_2025 huggingface dataset:
Study Of Strongly Swirling Gas-Liquid Flows In A Hydrodynamic Vortex Chamber
Authors: Yusupov Roman , Shtork Sergey , Alekseenko Sergey
Published: December 2021

The work is devoted to experimental study of one-phase and two-phase swirling flow in a horizontal vortex chamber with a tangential swirler. Special attention is paid to an emergence of unsteady vortex structures. Formation of a precessing vortex core (PVC) in the nozzle has been detected in the case of one-phase flow. Linear dependence of the PVC precession frequency and quadratic dependence of the full pressure drop in the vortex chamber on the fluid flow rate were confirmed experimentally. In the case of two-phase flow a high-speed visualization allowed to reveal the presence of the secondary vortex structures in cylindrical region behind the zone of sudden expansion. Adding a gas phase into the flow leads to a sharp decline of the precession frequency and full pressure drop decrease in the vortex chamber. The frequency smoothly decreases with further increase of gas content and pressure drop changes insignificantly: slightly increases or decreases depending on the water flow rate. At the same time there is a coherent change of the flow’s integral characteristics at changing the flow rates of liquid and gas.
Modelling Inlet Flow In Draft Tube For Different Regimes Of Hydroturbine Operation
Authors: Kuibin Pavel , Litvinov Ivan , Sonin Vladimir , Ustimenko Aleksandr , Shtork Sergey
Published: December 2021

One of the main sources of powerful pressure pulsations in the fluid flow parts of the hydroturbine at partial load or overload operation regimes is the precessing vortex rope forming due to high residual swirl of the flow downstream the hydroturbine wheel. Numerical simulation and experiments have been performed in order to study the influence of inlet flow conditions in the draft tube on level of the flow pulsations. Numerical calculations have shown that it is possible to reproduce velocity distributions at the draft tube inlet corresponding to different operation regimes of the real hydroturbines using a combination of two blade grids – rotor and stator. Experimental verification of numerical calculations was performed using an aerodynamic test rig and method of 3-d printing for fabrication of the blade grids and draft tube model. Velocity field measurements at entrance of the draft tube conical part making use of an laser-Doppler anemometer and level of the pressure pulsations using acoustic probes have allowed to define correlation between the velocity distribution type and amplitude-frequency characteristics of the flow pulsations which generated by the precessing rope.
Influence Of Initial Conditions At The Micro Nozzle Exit On Hydrogen Diffusion Combustion
Authors: Kozlov Viktor , Grek Genrich , Korobeinichev Oleg , Litvinenko Yuriy , Shmakov Andrey
Published: December 2021

The purpose of the given work will consist in an experimental study of influence of initial conditions at the micro nozzle exit on hydrogen diffusion combustion. It is shown, that the mean velocity profile and presence/absence of a heatcapacious material at the nozzle exit play an essential role on a flame structure and process of a round hydrogen microjet combustion. Velocity ranges of existence of a round hydrogen microjet diffusion combustion, flame separation and «bottleneck flame» region for a case of a top – hat mean velocity profile at the nozzle and two cases of a parabolic mean velocity profile with presence/absence of a heatcapacious material at the nozzle exit are found. Dependences of the «bottleneck flame» region size from a hydrogen microjet efflux velocity for case of a top – hat mean velocity profile at the nozzle and two cases of a parabolic mean velocity profile with presence/absence of a heatcapacious material at the nozzle exit are shown. Decrements of reduction of the «bottleneck flame» region size with growth of the hydrogen microjet efflux velocity for three situations of changes of initial conditions at the nozzle exit are determined.
Excitation Of Localized Wave Packet In 3d Supersonic Boundary Layer
Authors: Yatskih Alex , Rumenskikh Marina , Yermolaev Yuri , Kosinov Aleksandr , Semionov Nikolay , Kosorygin Vladimir
Published: December 2021

The results of experimental study of excitation of localized in time and space controlled disturbances (wave packets) in a supersonic swept-wing boundary layer are presented. The experiments were performed at Mach number M = 2 on the model of wing with a lenticular profile and a 40 degrees sweep angle of the leading edge at zero angle of attack. Wave packets were generated by a pulse electric discharge on the surface of the model. A structure of controlled wave packet was studied. It was found that the wave packet has an asymmetric shape. Comparison with the case of twodimensional boundary layer was done.
On Determination Of The Mechanism Of Mach Wave / Bow-Shock Interaction
Authors: Kosinov Aleksandr , Golubev Maxim , Pavlov Alexey
Published: December 2021

The work presents the results of investigation of interaction of outer couple weak shock waves with a bow shock produced by a triangle plate at Mach number M = 2. The couple of waves were generated by a two-dimensional roughness on the wall of the test section of supersonic tunnel. Hotwire measurements showed generated to free flow perturbations to correspond to N-wave. Optical visualization was done applying schlieren technique and interferometric method using adaptive visualizing transparencies based on absorption saturation. Qualitative coincidence of hotwire and interference data was obtained. Inclination angle of weak waves passed through the bow shock was observed to change.
Experimental Study Of The Diffusion Combustion Of A High-Speed Round Hydrogen Microjet Part 2. Lifted Flame, Supersonic Flow
Authors: Kozlov Viktor , Grek Genrich , Litvinenko Maria , Litvinenko Yuriy , Shmakov Andrey
Published: December 2021

Scenario of supersonic diffusion combustion of a round hydrogen microjet is presented in this work. The main features of supersonic diffusion combustion of a hydrogen round microjet are shown: disappearance of a «bottleneck flame» region, lifted flame from the nozzle exit and existence of supersonic «shock cells» in the lifted turbulent flame. The main reason for this scenario of diffusion combustion connected with a temperature factor is found i.e. with existence of thin-walled micronozzles with a small thermal capacity and a possibility of their quenching that doesn't give the chance to exist of the «bottleneck flame» region at big speeds of a microjet efflux. It is shown that with growth of temperature of a micronozzle heating from the «bottleneck flame» region at the same speed of a microjet efflux growth of its spatial size (l/d) is found.
Physical Base Of Associated Layer Model Applied To Nanofluid Viscosity Description
Authors: Zavialov Alexey , Syzrantsev Vyacheslav , Zobov Konstantin , Tananaev Ivan , Trufanov Dmitriy , Bardakhanov Sergey
Published: December 2021

The paper presents the mechanistic model for explaining the experimental data on the nanofluids viscosity, which is based on the assumption about the layer of liquid on the nanoparticles surface, which associates with them the mechanical solid inclusions. This allows us to supplement the Batchelor formula with the parameter whose selection allows us to fit it with the experimental data. Independent methods of estimating the associated layer thickness from experimental data are also presented. Its value is ~ 10 nm, which is in agreement with the papers on the flows of fluids in thin hydrophilic quartz capillaries. The physical cause of this layer formation is supposed in the structuring action of the nanoparticles surface, which is expressed in the ordering of the water molecules dipole momentum directions in the near-surface layers. This leads to the difference in the optical properties of the adjacent to the particles water layers and the bulk water, which allows one to explain the fundamentally different results of measuring the dimensions of nanoparticles in a liquid by various optical methods, both among themselves and in comparison with the nanoparticles specific surface. The methods of direct influence on the particles size distribution are also proposed which can allow us to verify the assumption (on which the considered associated layer mechanistic model essentially relies) of the possibility to group different nanopowders and introducing into the group a general parameterized function of the particle size distribution.
Awareness about Expressed Breast Milk Storage and Feeding Among Nurses in a Tertiary Care Hospital of Coastal South India
Authors: Maadtha Saanchia Andrea , Amreen Shahla , Rao S Suchetha
Published: December 2021

Introduction: Health personnel play a vital role in feeding baby with stored human milk and in educating mothers about expressed breast milk (EBM). Studies assessing nurses’ knowledge about EBM are limited. We aimed to study the awareness about EBM storage and preparation for feeding among pediatric nurses.

Methodology: A cross sectional study was carried out in tertiary care hospitals of South India. Participants answered the pretested questionnaire. Mean awareness score percentages of the participants was calculated, and compared for age, years of experience and place of work.

Results: Study enrolled 105 paediatric nurses with mean age of 33.13 ±12.05 years. Majority of participants knew the reason for expressing breast milk, how to express breast milk. Regarding the storage temperature of EBM, less than 50 % of the nurses were aware and 34.3% of nurses knew the preparation for feeding. The mean awareness score percentage was 65.71 ±16.64. Age group >40 years, neonatal intensive care unit nurses and work experience >10 years had significant relation to awareness scores.

Conclusion: Knowledge of nurses regarding reasons for and technique of expressing breast milk, methods of storing of EBM was good. Knowledge about storage temperatures and preparation for feeding was inadequate. Age group >40 years, neonatal intensive care unit as place of work and more than 10 years’ work experience related to the knowledge.
Trends in Publication of Negative Studies in Prominent Indian Medical Journals
Authors: Panwar Arvind Singh , Saxena Aseem , Charan Jaikaran
Published: December 2021

Background: Publication of negative studies is as important as positive studies as absence of one may lead to publication bias. Available data based on very few published studies suggests a very strong publication bias for publication of only positive studies and declining trends for publication of negative studies. In spite of a thorough review similar data on trend analysis of publication of negative studies for Indian Medical Journals could not be found. Present study is an attempt to estimate the prevalence and trends in publication of negative studies in selected Indian Medical Journals.

Materials and Methods: Indian clinical practice and clinical specialties journals having an impact factor (Indexed in SCI) with publication history of 12 years or more were included in the analysis. A total of 12 journals were eligible for the inclusion. All the original articles published in these journals were analysed and studies were labeled as negative or positive based on predefined criteria. Statistics: Descriptive statistics was reported in the form of frequency, percentage and 95%CI. Fisher exact test was used for comparison of categorical variable and excel was used for linear regression and trend.

Results: Out of total 6341 articles published in amongst these 12 journals between year 2000 to 2011, 284 (4.4%, 95% CI 4.0% to 5.0%) were negative studies. Slight positive trend in the publication of negative studies was observed. It was observed that there were significantly more negative studies were published in the journals having impact factor >1 as compared to journals having impact factor <1 (151/4415 Vs 133/1926, Fisher exact P =0.0000001).

Conclusion: Prevalence and trend of publication of negative studies in prominent Indian Medical Journal shows strong publication bias that needs to be addressed on priority at various levels.
Variation Between Voivodships in Terms of Forest Area and Silviculture Activities in Polish Forests in 2015-2019
Authors: Grużewska Agata , Rymuza Katarzyna , Niewęgłowski Marek
Published: December 2021

The objective of the study reported here was to compare voivodships in terms of forest area, forest regeneration area, afforested area, thinned forest area and natural forest regeneration area Main Statistical Office data for Polish voivodships was analysed. It included forest area, natural forest regeneration and silviculture activities (forest regeneration, afforestations and thinning) in all forests, state-owned forests and privately-owned forests. Voivodships were compared using the arithmetic mean, the indicator of structure, the average rate of change, principal component analysis and cluster analysis. Principal Component Analysis, revealed that state-owned forest area, forest regeneration in state forests, total forest regeneration, and thinning in state-owned forests had the greatest share in the multivariate variation among voivodships analysed in terms of forestry. Cluster analysis yielded two groups of voivodships. The voivodships in the first group had a higher average total forest area, area of state-owned forests, total area of forest regeneration and forest regeneration in state-owned forests, area of natural forest regeneration and thinning in state-owned forests. On average, forests of voivodships which formed group 2 included less privately-owned forests in which fewer forest regeneration and afforestation activities had been conducted. Opolskie and Śląskie Voivodships as well as Łódzkie and Świętokrzyskie Voivodships were the most similar in terms of all the analysed characteristics.
Municipal Heat Energy of Ukraine - Adaptation to Global Warming
Authors: Basok Borys
Published: December 2021

Rising global temperatures have exacerbated the problems of adaptation to climate change in various sectors of the economy, including municipal energy. Therefore, the task is to develop measures and mechanisms, the implementation of which will guarantee cost-effective comfortable and reliable heat and cold supply of buildings and structures in climate change. Experimental studies of heat transfer and monitoring of thermal regimes in enclosing structures and building elements were conducted with the development of innovative engineering systems for energy supply of a passive house of the "zero-energy" type. Experimental developments of innovative energy-efficient greenhouse gas-reducing technologies and equipment for energy supply systems of buildings have been performed and their architectural and construction solutions for adaptation to climate change have been optimized. In order to expand and deepen the theory and practice of improving the energy efficiency of buildings in the near future, the scientific priority and subject of basic and applied research have been identified. Developed adaptive to climate change innovative, energy efficient technologies and equipment of engineering systems of energy supply of buildings with the use of renewable energy sources can be used in the practice of energy supply of housing and communal services.
Does Foreign Direct Investment Affect Employment in Guinea: Empirical Assessment
Authors: Keita Oumar , Baorong Yu
Published: December 2021

This study shed light on the extent to which foreign direct investment contribute to employment in Guinea. FDI per GDP net inflows and unemployment rate are adopted as key indicators whereas inflation, trade openness, credit to private sector are control variables. 

The empirical evidence is computed through ARDL method and the subsequent findings are established: first, foreign investment negatively and insignificantly affects unemployment in the short run. This result may be linked to the fact that a huge portion of FDI in Guinea is resource seeking type which itself does not generate enough jobs in the affiliate firms. Moreover, the interactions between such kind of investment and local suppliers are very limited, mitigating its effect on employment in the supplier’s side. Second, the short term coefficients for inflation and credit to private sector are positive and insignificant, contradicting a popular macroeconomic theory known as Phillips curve.  

Overall, government should promote investments that can have transformative effect on domestic economy through linkages and spillovers. Furthermore, special emphasis must be put on human capital (education and healthcare) so that Guinean youth could be more competitive and capable to seize job opportunities offered both by foreign multinationals and local firms.  
The Effect of UV Exposure on the Service-life of Thermochromic Microcapsules Integrated into the Epoxy Matrix
Authors: BULDERBERGA Olga , ANISKEVICH Andrey
Published: December 2021

The effect of ultraviolet (UV) exposure on the service-life of thermochromic microcapsules integrated into the epoxy matrix was investigated. The microcapsules of the formaldehyde shell contain the core of thermochromic leuco dye. Seven sets of epoxy resin samples filled with concentrations from 0 to 10 wt.% of microcapsules were investigated. The composite samples were exposed to UV for approximately 1000 h. For the quantitative evaluation of colour change under UV, a fast and simple original procedure based on samples’ image treatment was developed. With the exposure time intervals of 50 h, samples were taken out from the UV light chamber to evaluate the exposure effect on their reversible thermochromic ability and mechanical properties. Periodical evaluation of the UV light effect on mechanical properties during the exposure was performed by microhardness tests. Tensile tests of the samples till the fracture were performed every 200 h. The critical time under the exposure of the UV lamp that destroys the reversible thermochromic reaction of the microcapsules was defined as 200 h. At the same time, it has been found that the mechanical properties of the epoxy resin under the same UV source were not strongly affected after 1000 h of irradiance and changed in the frame of ~ 10 %.
Relationship Between Social Activity and Frailty in Japanese Older Women During Restriction on Outings due to COVID-19
Authors: Akita Michiko , Otaki Naoto , Yokoro Miyuki , Yano Megumu , Tanino Norikazu , Fukuo Keisuke
Published: December 2021

Background 
This study investigated the relationship between social activities and frailty during the restriction on outings due to COVID-19. 
Design 
A cross-sectional study. 
Setting and Subjects 
This study was conducted in City Nishinomiya of Prefecture Hyogo, in Japan. A mail survey was carried out among women aged 65 years or older in May 2020. A population of 293 women aged 65 years or older living in the community was recruited for the study and 213 of them were analyzed. 
Measurements 
The survey included questions on sex, age, height, weight, and social activity. Social activity consisted of participation in social organizations and their frequency, as well as frequency of interaction with family and friends. The survey also asked if regular social activity had been impeded by COVID-19. 
Results 
A significant association was found between frailty and hindered interaction with friends (β: 0.176, p = .014). Multivariate linear regression analysis confirmed that this association was also significant in Model 1 (β: 0.158, p = .025), and Model 2 (β: 0.148, p = .034). 
Conclusions 
No association between being hindered in social activity and frailty was found in older women living in the community during the restriction on outings due to COVID-19.
Characteristics of Older Adults Accessing Medical Assistance in Dying (MAiD): a Descriptive Study
Authors: Selby Debbie , Chan Brandon , Nolen Amy
Published: December 2021

Background 
Medical Assistance in Dying (MAiD) is an end-of-life option for Canadians accounting for 2% of all deaths in Canada in 2019. Adults over 80 years old represent a significant proportion of these deaths, yet little is known about how they compare with their younger counterparts. 
Methods 
This study retrospectively reviewed our tertiary care institution’s MAiD database to compare MAiD recipients <65, 65–80, and >80 years of age. Extracted data included basic demographics, illness characteristics, functional status, social living arrangements/contacts, and outcomes of MAiD assessments. 
Results 
Of 267 patients assessed for MAiD, 38.2% were over 80. Compared to the younger groups, those over 80 were more likely to be female, to live alone, and to be widowed; however, they did not self-identify as ‘socially isolated’. The majority fit into the illness categories of malignancy, cardiopulmonary or neurologic diseases, but those over 80 were more likely to have other more chronic/subacute conditions leading to the MAiD request. 
Conclusions 
Older adults accessing MAiD are distinct in that they tend to be increasingly frail and without a predominant underlying diagnosis as compared with younger adults, but rather have an accumulation of losses resulting in global functional decline and subsequent loss of autonomy and independence.
Polizieren der Pandemie als Mehrebenen-Problem
Authors: von Laufenberg Roger , Adensamer Angelika , Herbinger Paul
Published: December 2021

Das rasche Auftreten der COVID-19-Pandemie und die daraufhin ergriffenen Maßnahmen waren ein immenser Einschnitt für die Routinen und Arbeitsweisen ganzer Gesellschaften. Trotz grundlegender Unterschiede im Verlauf der Pandemie in verschiedenen Ländern war eine nahezu universelle Reaktion hierbei der Einsatz der Polizei als zentraler Akteur in der Pandemiebekämpfung. In vielerlei Hinsicht lässt sich im Kontext der COVID-19-Pandemie von dem ersten globalen Polizeiereignis sprechen. Die Notwendigkeit des sofortigen Handelns einer komplexen Gruppe von Akteur:innen - vor allem von Regierung, Ministerien und Polizei - hat die Grenzen der Handhabung der Pandemie gezeigt. Diese Grenzen zeigten sich hauptsächlich in einer Störung des klassischen demokratischen Handlungsrepertoires, wie z. B. Befehlsketten und bestehende Kontrollsysteme, oder auch Gesetzgebungsprozesse und deren praktische Umsetzung. Die schnelle Mobilisierung der Polizei war somit auch mit einer Reihe von erheblichen Herausforderungen verbunden. Die übereilte Umsetzung von Gegenmaßnahmen führte zeitweise zur Verletzung von Grundrechten der Bürger:innen. Die mangelnde Präzision von Gesetzen und Rechtsverordnungen hat der Polizei einen ungewöhnlich großen Ermessensspielraum eingeräumt, individuelle Polizist:innen konnten freier entscheiden, welche COVID-19 Maßnahmen, wie umzusetzen und zu sanktionieren sind. Dies führte zu Unsicherheit und Verwirrung der betroffenen Bürger:innen, aber auch innerhalb der Polizei als Organisation. Die zugewiesene Rolle der Polizei und die dadurch auftretenden Probleme, wie etwa Polizeiwillkür, werfen daher die Frage auf, ob die Polizei überhaupt Gesundheitskrisen wirksam bewältigen kann. Letztlich zeigt der Einsatz der Polizei bei der Bewältigung der aktuellen Pandemie möglicherweise Grenzen der demokratischen Handlungsrepertoires selbst auf. Allerdings zeigen sich im polizeilichen Ermessenspielraum möglicherweise auch strukturelle Funktionen der Beziehung zwischen dem Staat und der Polizei, die zentral für die Bearbeitung und Beruhigung der Grenzen des demokratischen Handlungsrepertoires sind. In diesem Beitrag wird daher diese Doppelrolle der Polizei und deren Ermessensspielraum untersucht. Anhand von explorativen Interviews mit Polizeibeamt:innen, einer vorläufigen Sichtung von Medienberichten und Verordnungen, sowie Elementen einer Alltagsempirie, wird versucht, die Umrisse der durch die Pandemiebewältigung enthüllten Grenzen des demokratischen Handlungsrepertoires nachzuzeichnen. Ein besonderes Augenmerk gilt dabei der strukturellen Rolle, welche der Polizei in diesen Bewältigungsversuchen zukommt.
Effectiveness of Transcranial Direct Current Stimulation and Pharmacotherapy in Pain Management in Patients with Chronic Pain
Authors: Lotfi Jabali Atefeh , Mojtabaei Mina , Mirhashemi Malek
Published: December 2021

Background: A variety of pharmacological and nonpharmacological methods are used to treat chronic pain. Transcranial direct current stimulation (tDCS) through stimulating the central and peripheral nerves is a different and promising method for the treatment of chronic pain. Objectives: The present study aimed to investigate the effectiveness of tDCS and pharmacotherapy in pain management in patients with chronic pain in Tehran, Iran. Methods: The present study followed a clinical trial design. The statistical population comprised all patients with chronic pain who were referred to Pardis Multidisciplinary Pain Clinic in Tehran within 2020 - 21. A total of 60 patients willing to participate in the study were selected using convenience sampling. The participants were randomly divided into three groups, including pharmacotherapy (treatment by gabapentin with a dosage of 600 mg twice per day), tDCS, and control (n = 20 per group). The research instrument included the McGill Pain Questionnaire. The data were analyzed using repeated-measures analysis of variance with SPSS software (version 24.0). Results: The results showed that both pharmacotherapy and tDCS interventions led to a reduction in the mean scores of pain management components, compared to the control group (P < 0.001). Furthermore, there was no significant difference between the effects of the two experimental groups on pain management components. Conclusions: The tDCS and pharmacotherapy were both shown to be effective in pain management in patients with chronic pain. Therefore, in addition to pharmacotherapy, tDCS is also recommended for the treatment of chronic pain.
Teknolojinin Neresindeyiz? Bilim ve Kurguda Gelecek-Zaman Tasavvurları
Authors: DEMİR Sertaç Timur
Published: December 2021

Bu makalede bilim ve kurgu portreleri üzerinden bir tür “yaşanan gelecek” sorgulaması yapılmaktadır. Çalışmada teknolojinin engin dünyasına sosyal bilimlerin eleştirelliğiyle yaklaşan düşünürlerin izleri varsa da; bu teorik arkaplan, bu makalede teknolojinin çağcıl dönüşümü ve felsefi yansımaları gereğince yeniden mercek altına alınmaktadır. Hiç şüphesiz tüm küreyi etkisi altına alan ve birçok teknolojik deneyimi meşrulaştıran Covid-19 salgını, bu sorgulamayı doğru zamanlı bir girişim yapmaktadır. Nitekim uzay, zaman, savaş, makineler, robotlar, yapay zekâ, veri, gen, biyo-teknoloji, mikroplar, virüsler, beden, sağlık, ölüm/süzlük, hafıza, siber-dünya, otorite, otomasyon, mekân, iklim, demografi, taşıtlar ve aygıtlar gibi bilim ve kurgunun kadim temaları, bu salgının ellerinde biz modernleri izleyici olmaktan çıkarıp, ‘kendine tanık’ yapmıştır. Tam da bilim kurguda vücut bulan bu tanıklığa belli bir mesafeden bakan bu makalede, modern dünyanın gözünü karartıp girdiği loş tünelin görünümleri incelenmektedir. Bu amaçla bilimin kurguyla, bilim kurgunun gerçekle, gerçeğin gelecekle; araçların modern insanla ve felsefenin fütürizmle ilişkisi ele alınmaktadır.
A Study in Xenological Phenomenology
Authors: Eberle Thomas S. ,   Zeta Books
Published: December 2021

This keynote takes a fresh look at Schutz’s essay on “The Stranger” of 1944. After a brief reflection on the probably universal topos of the stranger, it discerns three different kinds of strangeness in that essay: 1. the otherness of the other and the inaccessibility of the other’s experiences; 2. the strangeness vs. familiarity of elements of knowledge; and 3. the social acceptance by the in-group. Then some methodological implications of Schutz’s approach are pondered, his somewhat hidden offer of an alternative sociology and the postulate of adequacy. Subsequently, two critical issues are discussed: Schutz’s handling of values and value-relations and his complete omission of affects and emotions in spite of all the hardship the (Jewish) immigrants at that time suffered from. An outlook on future Schutzian research concludes the paper.
Strangeness of the Strange
Authors: Garrett Erik ,   Zeta Books
Published: December 2021

This article reexamines Alfred Schutz’s famous 1944 Stranger essay and the initial criticism of Aron Gurwitsch. I side with Schutz in thinking of the refugee as a special type of stranger. Then to respond to the charge that the essay is not philosophical enough from Gurwitsch, I read Schutz’s notion of the strange with Husserl’s notion of homeworld and Levinas’s notion of fecundity. This allows us to see the philosophical depth of doing a phenomenology of the stranger and strangeness.
ХИМИЧЕСКИЕ МОДЕЛИ НЕЛИНЕЙНОЙ ДИНАМИКИ
Authors: Ванаг Владимир К.
Published: December 2021

Рассмотрены наиболее известные модели химических динамических систем, такие как Брюсселятор, Орегонатор и др. На примере этих моделей читатель познакомится с основными понятиями нелинейной динамики. Рассмотрены и более сложные модели, демонстрирующие хаотическую динамику и мультиритмичность. Пособие написано в помощь магистрам и аспирантам, изучающим основы дисциплины «Нелинейная динамика» как составной части образовательных программ по биофизике (03.01.02), химической физике (01.04.17), кинетике и катализу (02.00.15) и другим родственным специальностям.
Tres matrices del lenguaje-pensamiento
Authors: Santaella Lucia
Published: December 2021

Desde hace muchos años, la lectura, descripción y análisis de los más diversos tipos de discursos verbales y procesos sígnicos no ver bales han estado en el centro de mis preocupaciones. El metabolismo de los sistemas de lenguaje se asemeja al de los seres vivos. Como los organismos vivos, los lenguajes están en permanente crecimiento y mutación. Los procesos de parentesco, trueque, migración e intercambio entre los lenguajes no son menos densos y complejos que los que rigen la demografía humana. En fin, el mundo de los lenguajes parece ser tan móvil y volátil como el mundo de los vivos. A pesar de eso, no abdiqué de la búsqueda de inteligibilidad de posibles leyes generales que están por debajo de todos los fenómenos sígnicos.
Semiótica de la música: una teoría basada en Peirce
Authors: Martínez José Luiz
Published: December 2021

El estudio de problemas de significación musical se realiza en diferentes culturas casi desde hace tanto tiempo cuanto la propia práctica de la música. Una perspectiva milenaria evocaría al menos las normas cosmo-político-musicales establecidas por los chinos; en India, el sistema musical basado en las estructuras de ragas y talas, la teoría esté tica de rasa (a los que se asocian ragas y talas) y la mitología y cosmología indias, marcadas esencialmente por manifestaciones sonoras; además de elementos de significación musical en las tradiciones he brea, cristiana e islámica. No se podría ignorar la funcionalidad social y comunicativa de la música en las llamadas culturas primitivas, alrededor del globo.
Sobre métrica comparada
Authors: Domínguez Caparrós José
Published: December 2021

A la hora de definir y explicar un programa de actividades comparatistas en el campo de la métrica, es imprescindible mirar a lo que sobre el asunto dicen tanto quienes tratan de definir la literatura comparada como quienes tratan de definir la métrica. En segundo lugar, habrá que examinar qué es lo que hacen las investigaciones métricas que puede ser calificado de comparatista.
Otros datos sobre la trayectoria de la palabra «literatura» en castellano
Authors: Abad Francisco
Published: December 2021

Vamos a llevar a cabo algunas anotaciones acerca de la marcha de la palabra literatura en nuestra lengua: estamos ante una de las palabras fundamentales del ámbito de la filología que aún espera la reconstrucción en detalle de su historia, historia que por supuesto no hemos trazado tampoco nosotros por completo todavía.
Reseña de: Alicia Molero de la Iglesia: La autoficción en España. Jorge Semprún, Carlos Barral, Luis Goytisolo, Enriqueta Antolín y Antonio Muñoz Molina. Berna: Peter Lang. Perspectivas Hispánicas, 2000
Authors: Puertas F. Ernesto
Published: December 2021

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Reseña de: Genara Pulido Tirado: La reflexión metacrítica y teórico literaria en el siglo XX. Aproximaciones. Jaén: Universidad de Jaén, 1999, 119 páginas
Authors: Salas Romo Eduardo
Published: December 2021

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Analytic properties of Ohno function
Authors: Kamano Ken , Onozuka Tomokazu
Published: December 2021

Ohno's relation is a well-known relation on the field of the multiple zeta values and has an interpolation to complex function. In this paper, we call its complex function Ohno function and study it. We consider the region of absolute convergence, give some new expressions, and show new relations of the function. We also give a direct proof of the interpolation of Ohno's relation.
Opportunity Exploitation in Times of the COVID-19 Pandemic – The Importance of Dynamic Capabilities and the Entrepreneur’s Characteristics
Authors:   Poznań University of Economics and Business, Malewska Kamila , Ratajczak-Mrozek Milena ,   Poznań University of Economics and Business, Sajdak Maja
Published: December 2021

Purpose: The purpose of the paper is to answer the question of how entrepreneurs can take advantage of and exploit the conditions and opportunities resulting from the COVID-19 pandemic. Methodology: In the paper, we apply the conceptual review method in order to review extant knowledge, identifying important research gaps, and propose a conceptual framework for the research. Findings: We propose a conceptual framework of the recognition and exploitation of business opportunities during the COVID-19 pandemic. The framework assumes the influence of specific dynamic capabilities (strategic foresight – at the strategic level and innovation, self-structured and relational capabilities – at the operational level) and the entrepreneur’s key characteristics (being intuitive, having the ability to learn – especially in the field of crisis management, being innovative, having leadership competencies and having the ability to use advanced digital technologies) on the identification, creation and exploitation of opportunities during the COVID-19 pandemic. Research limitations: The main limitation results from the dynamism of the pandemic situation. Therefore, our results need further empirical verification. Practical implications: The model provides managerial implications for entrepreneurs responsible for decisions and actions during the pandemic crisis. We underline the importance of the development of entrepreneurs’ own competencies as well as the development of the competencies of their employees in the context of crisis management. We especially suggest that managers develop leadership competencies which relate to the competence of how to delegate powers and build empowerment in order to take advantage of the opportunities resulting from the effects of the COVID-19 pandemic. To exploit opportunities effectively, they should be recognized early, and therefore entrepreneurs should consider the benefits of using intuition in this area. Value: The special value of the paper can be seen in the context of the analysis. There is a shortage of studies identifying the impact of dynamic capabilities and the entrepreneur’s characteristics on the exploitation of opportunities during the specific situation of the COVID-19 pandemic.
Text as a Dialogue: The Role of Paratexts and Intertexts in Hemingway’s Death in the Afternoon
Authors: Borkiewicz Klaudia
Published: December 2021

The main aim of this paper is to demonstrate that the vibrancy and multidimensionality of Hemingway’s work lies in its dialogic nature. In the light of the above-mentioned, referring both to Kristeva’s notion of intertextuality and Genette’s concept of paratext, the paper constitutes an attempt to bring into focus a dynamic network of interactions, which manifest themselves at the level of the text’s structure and meaning. Correspondingly, an outgoing dialogue between Spanish and American culture, between the factual and the fictional, between the articulated and the unsaid, should be viewed as breeding ground for the reader’s role in the negotiation and co-creation of meaning. As a result Death in the Afternoon becomes something more than just a manual on how to look at the bull fight. With its internal diversification, the text becomes a chance of meeting, a carnivalistic space opened for an ongoing dialogue and interaction between the elements both internal and external to the text, inviting the reader to immerse fully into a constant and always relevant conversation between writing styles, forms of artistic expression and culture.
Role and Function of Ethnology in Developing the Aesthetic Competence
Authors: Snikhovska Irena , Glazunova Lesya , Soloviova Larysa , Tymchuk Olena
Published: December 2021

The article is devoted to the experimental testing of aesthetic competence of future philologists by means of ethnology. The principles (national character, humanization, ethnicization, cultural conformity, integration) are considered and stages of model implementation (orientative, training, creative) are elaborated and characterized. Structural and functional components, criteria and indicators of the levels of forming the future philologists' aesthetic competence are defined. The characteristic of levels of aesthetic competence development in philology students (reproductive, constructive, creative) is given. The characteristics of the levels with the help of the coefficient of tasks completeness related to knowledge, skills and abilities for aesthetic competence development of the philology students by means of ethnology were determined. The paper concludes by calling attention to the enhancement of the educational process forms and methods in order to develop the aesthetic competence of future philologists by means of ethnology, urging to instill the aesthetic competences more purposefully and integrally throughout the Bachelor program.
Student Opinions on Psychomotor Learning Activities Used in Music Lessons
Authors: Soykunt Neriman , Gorgoretti Başak
Published: December 2021

This study aims to determine the situation by examining the opinions of 8th-grade students about psycho-motor activities used within the scope of 8th-grade music lessons. Semi-structured interview technique was used as a qualitative method in the research. With this method, data were collected by conducting one-on-one interviews with 8th-grade students. The study was conducted with forty-four 8th-grade students. The obtained data were analyzed by making content analysis. According to the findings obtained from the interviews; It is understood that the psycho-motor activities used in schools are mostly similar, but there are problems in the implementation process, the activities cannot be used effectively and efficiently, and music lesson activities are not given enough importance due to the problems arising from the deficiencies in the material and learning environment. From the students' opinions, it is understood that the theoretical parts of the music lessons are long and the lessons conducted in this way are boring. Based on the students' opinions, it is understood that the singing activity is the most used psycho-motor activity, but this activity is not used to improve the musical knowledge and skills taught in the lessons, but to increase the students' interest in the lessons. It is understood that rhythm exercises, body percussion and instrument playing activities are less involved in music lessons than singing activities.
Functions of 1,25-dihydroxy vitamin D3, vitamin D3 receptor and interleukin-22 involved in pathogenesis of gout arthritis through altering metabolic pattern and inflammatory responses
Authors: Chen Yuqi , Ma Huiya , Du Youwei , Dong Jianjian , Jin Chenkai , Tan Lihui , Wei Rong
Published: December 2021

Background

Gouty arthritis (GA) is a common type of inflammatory arthritis. Recent studies demonstrated that 1,25-dihydroxy vitamin D3 (1,25(OH) 2 VD3) and vitamin D3 receptor (VD-R) play a protective role in acute inflammation, but interleukin-22(IL-22) promotes inflammation, especially for arthritis. However, our understanding of the responses of 1,25(OH) 2VD3 and IL-22 to gout was still unclear. Presently, in-depth metabolomics, bioinformatics and clinical characteristics analyses were performed to elucidate the pathogenesis and valuable clinical indicators of gouty arthritis.

Methods

Peripheral venous blood was taken for investigation. The levels of IL-22 and 1,25(OH)2VD3 were determined in patient’s plasma via ELISA, and the mRNA levels of IL-22 and VD-R were measured via qRT-PCR. The interaction network of VD-R and IL22 were constructed by the Search Tool for the Retrieval of Interacting Genes/Proteins (STRING), and the biological function of the related proteins were analyzed by Clusterprofiler Metabolomics were performed to decipher the metabolic variations of GA.

Results

The levels of VD-R and 1,25(OH) 2 VD3 were identified to be low. What,s more, GA patients were reported to have high expression of IL-22. And IL-22 levels positively correlated with C-reactiveprotein (CRP) serum levels in the bivariate correlation analysis, whereas the level of 1,25(OH) 2VD3 negatively correlated with that of CRP. GO and KEGG analyses revealed that IL-22 and 1,25(OH) 2 VD3 were involved in stress immunity and inflammatory responses. These pathways are known to play a role in GA pathogenesis. Meanwhile, the metabolic profiles of GA serum showed that the increase in various amino acids and uric acid are involved in GA pathogenesis. Importantly, VD-R and IL22 closely correlated with the level of key metabolites uric acid, whose increase promoted the occurrence of GA.

Conclusion

GA patients have low levels of VD-R and 1,25(OH) 2 VD3, and high levels of IL-22 together with various amino acids and uric acid. The levels of IL-22 and 1,25(OH) 2VD3 were positively and negatively correlated with C-reactive protein (CRP) serum levels, respectively. Both IL-22 and 1,25(OH) 2 VD3 functioned in GA-related immune and inflammatory responses, and closely correlated with the level of GA-related uric acid. Overall, IL-22, VD-R and 1,25(OH) 2 VD3 play functionally important roles in inflammatory responses and are relevant to gout pathogenesis.
Determination of Some Heavy Metals in Cultured Nile Tilapia (Oreochromis niloticus) in Western Kordofan State, Sudan
Authors: Idam O. A. , S. Musa M. Rowaida , A. Yousif Ramy
Published: December 2021

The current study was conducted in two different localities have been selected in Western Kordofan State (Elsonout and Abu-zabad Localities) to evaluate some heavy metals concentrations (Copper, Cadmium, Zinc, and Lead) in three parts (liver, gills and muscles) of Nile Tilapia (Oreochromis niloticus) cultured in Dams, also to evaluate the same heavy metals concentrations in Dams water where Nile Tilapia is cultured. The evaluation was included the correlation of heavy metals accumulation between fish organs and water samples were compared. Finally, the results were compared with recommended levels by FAO, WHO and other international organizations. A total of 54 samples has been taken from marketable size Nile Tilapia parts (gills; livers and muscles) and subjected to analysis of heavy metals accumulations. Also, a total of 18 water samples were taken from Dams (shallow, middle and deep water). The data was subjected to SPSS using ANOVA. The findings of this work were revealed that, there were a highly significant differences (P≤0.01) in all heavy metals among gills, liver and muscles of Nile Tilapia cultured in Dams. And there was a highly significant difference (P≤0.01) in all heavy metals among gills, liver and muscles of Nile Tilapia according to localities. Anyway, when compared fish organs; we found that, gills were recorded the maximum figures in all heavy metals followed by livers and the minimum figures were recorded by muscles. The results of this study were in the permissible levels recommended by international organizations.
The Effects of Three Traditional Smoking Methods on the Concentrations of Polycyclic Aromatic Hydrocarbons (PAHS) in Smoked Fishes
Authors: Joseph Aderinola Oluwatoyin , Adu A. A. , Babalola O. O. , Kusemiju V. , Mekuleyi G. O.
Published: December 2021

The effects of three traditional smoking methods on the concentrations of Polycyclic Aromatic Hydrocarbons (PAHs) in smoked fishes were studied to determine the concentration of PAHs in locally available and commonly consumed smoked fish species. Samples of two highly traded species of fish, Scomber scombrus and Horse markerel, among the low income people for immediate consumption were purchased from the market and processed using sawdust smoke, firewood smoke and charcoal smoke respectively. Some of the fresh fishes were also analyzed as control. The PAHs content were extracted with standard dichloromethane using solid-liquid extraction, and analyzed using Gas chromatography – Mass spectrophotometer (GC-MS) method. The results showed that fish samples processed with sawdust smoke recorded the highest concentrations of total PAHs, having 1.295 mg/kg in Horse markerel and 2.020 mg/kg in Scomber scombrus, followed by firewood smoked samples with total PAHs content of 0.910mg/kg in Horse markrel and 1.175 g/kg in Scomber scombrus while charcoal smoked samples recorded the least total PAHs levels of 0.590 mg/kg in Horse markerel and 0.960 mg/kg in Scomber scombrus. Benzo(a)pyrene concentrations which is usually used to estimate the carcinogenicity of other PAHs was below detection level in both species of fish. PAH4 was proposed by European food safety authority, recommendation level of 30 mg/kg was concluded by the EU regulation. Any PAHs have been associated with intense carcinogenicity in humans, and thus have implication for the quality and safety of these fish products. Therefore, it is imperative that regulatory bodies conduct awareness campaigns to educate the smoked fish processors, traders and consumers on the need to discourage the use of sawdust in smoking fish and adopt safer and improved methods of smoking fishes.
Sn‐Pb Mixed Perovskites with Fullerene‐Derivative Interlayers for Efficient Four‐Terminal All‐Perovskite Tandem Solar Cells
Authors: Hu Hang , Moghadamzadeh Somayeh , Azmi Raheleh , Li Yang , Kaiser Milian , Fischer Jan C. , Jin Qihao , Maibach Julia , Hossain Ihteaz M. , Paetzold Ulrich W. , Abdollahi Nejand Bahram
Published: December 2021

Interfacial engineering is the key to high‐performance perovskite solar cells (PSCs). While a wide range of fullerene interlayers are investigated for Pb‐based counterparts with a bandgap of >1.5 eV, the role of fullerene interlayers is barely investigated in Sn‐Pb mixed narrow‐bandgap (NBG) PSCs. In this work, two novel solution‐processed fullerene derivatives are investigated, namely indene‐C60‐propionic acid butyl ester and indene‐C60‐propionic acid hexyl ester (IPH), as the interlayers in NBG PSCs. It is found that the devices with IPH‐interlayer show the highest performance with a remarkable short‐circuit current density of 30.7 mA cm−2 and a low deficit in open‐circuit voltage. The reduction in voltage deficit down to 0.43 V is attributed to reduced non‐radiative recombination that the authors attribute to two aspects: 1) a higher conduction band offset of ≈0.2 eV (>0 eV) that hampers charge‐carrier‐back‐transfer recombination; 2) a decrease in trap density at the perovskite/interlayer/C60 interfaces that results in reduced trap‐assisted recombination. In addition, incorporating the IPH interlayer enhances charge extraction within the devices that results in considerable enhancement in short‐circuit current density. Using a NBG device with an IPH interlayer, a respectable power conversion efficiency of 24.8% is demonstrated in a four‐terminal all‐perovskite tandem solar cell.