bluuebunny/crossref_metadata_2025 huggingface dataset:
Érase una vez…un aula presencial. Acerca de Plataformas y Aulas Virtuales Invertidas en tiempos de Covid.
Authors: Lliteras Alejandra Beatriz , Gordillo Silvia , Bazzocco Javier , Grigera Julián , Orlando Federico
Published: April 2021

Cuando inició el ciclo lectivo 2020 los docentes teníamos aprobadas nuestras planificaciones diseñadas en torno al aula presencial, sin embargo, podríamos decir que, el Covid hackeo el sistema y nos puso a todos, independientemente del nivel educativo en el que enseñáramos, en una situación de virtualidad y en muchos casos de vulnerabilidad. En este trabajo se presentan las estrategias pedagógicas y el diseño curricular de la materia de grado “Bases de Datos 1”, de la Facultad de Informática de la UNLP, implementados durante esta coyuntura. Para ello, se abordan temáticas como uso de Plataformas, Aula Virtual Invertida, Aprendizaje Colaborativo y Aprendizaje Basado en Juegos. Durante el curso se desarrollaron encuestas y sondeos con los cursantes, con el objetivo de relevar sus necesidades, percepciones respecto a las propuestas y sugerencias para implementar mejoras que propiciaran su Aprendizaje Significativo y la apropiación de los conocimientos. En base a la información relevada, se espera abrir un espacio de debate con otros docentes, acerca de cómo estas nuevas prácticas adoptadas durante la no presencialidad,

pueden sumarse a la planificación a futuro más allá del regreso físico a las aulas y para discutir acerca de la “nueva normalidad”, al menos en la Educación Superior.
Accesibilidad académica en la Educación Superior. Docencia en línea en contexto de pandemia por COVID-19
Authors: Viano Hugo , Zuñiga Mariela , Rosas María V.
Published: April 2021

En nuestro país, la legislación referida específicamente a la Educación Superior de las personas con discapacidad, establece que el Estado deberá garantizar la accesibilidad física, comunicacional y académica para las mismas. En este colectivo se incluyen a las personas que tengan deficiencias físicas, mentales, intelectuales o sensoriales a largo plazo que, al interactuar con diversas barreras, puedan impedir su participación plena y efectiva en la sociedad, en igualdad de condiciones con las demás. En relación con la accesibilidad académica se considera como una de las posibles barreras el contar con materiales de estudio en formatos poco accesibles, así se destaca la importancia de una elaboración consecuente de los mismos, siendo el rol de las nuevas tecnología central en esta situación. Además, es importante destacar la relevancia de utilizar licencias libres para la publicación de los mismos. En este sentido, se implementó una propuesta de formación docente reformulada y adaptada al contexto actual de pandemia, con la idea de fortalecer el desempeño del profesorado en accesibilidad académica y prácticas online. Asimismo, la digitalización de contenidos puede favorecer tanto la accesibilidad

académica como la comunicacional potenciando la acción docente y contribuyendo con el éxito de una actividad formativa centrada en el estudiante.
Consultorio Tecnológico Virtual: una propuesta de aprendizaje y ayuda en la pandemia
Authors: Ordinez Leonardo , Biscayart Laura
Published: April 2021

En el contexto de la situación generada por la pandemia por COVID-19 y el Aislamiento, Social, Preventivo y Obligatorio dispuesto por el Poder Ejecutivo Nacional, el cual no permitió la presencialidad de las clases universitarias, se desarrolla una propuesta de Consultorio Tecnológico Virtual, en el marco de la asignatura Análisis y diseño de sistemas, de la Licenciatura en Informática, que se dicta en la Universidad Nacional de la Patagonia San Juan Bosco, sede Puerto Madryn. Esta iniciativa articula con el medio socio-productivo local, a través de ofrecer asistencia y acompañamiento de baja complejidad a comerciantes, docentes y ciudadanos, en general. Desde el punto de vista pedagógico, la propuesta instrumenta un enfoque de aprendizaje desde la experiencia, mediante la interacción real y concreta, aunque contenida, con “clientes”. Esto involucra el abordaje de contenidos como Ingeniería de requerimientos, procesos de software, análisis de sistemas y diseño centrado en el usuario. El Consultorio promueve aprendizajes activos y significativos en los y las estudiantes, así como articulaciones virtuosas con la comunidad.
Palabras clave: COVID-19; Aprendizaje basado en la experiência; Consultorio tecnológico virtual; Análisis y diseño de sistemas; Asistencia tecnológica; Virtualidad; Ingeniería de requerimientos.
O contrato didático no ensino remoto: uma aplicação na aula de Geometria
Authors: Gomes Cidrão Georgyana , Ferreira de Azevedo Italândia , Vieira Alves Francisco Régis
Published: April 2021

O ensino remoto é uma modalidade de ensino emergencial imposta ao sistema educacional quando existem fatores que impedem aulas presenciais. Desse modo, atualmente, devido à COVID-19, as aulas de diversos países estão se adequando ao cenário de ensino remoto. Neste trabalho, refletimos como o contrato didático se adequa ao ensino on-line, levando em consideração dois fatores: ensino presencial e ensino remoto. Contudo, observamos como foi estabelecido o contrato didático em uma aula com alunos do Ensino Médio, utilizando o Google Meet. A partir disso, consideramos que a teoria do contrato didático é valiosa na avaliação do sistema didático (professor-aluno-saber), mesmo diante do ensino remoto.
Sistema de Comunicación Multimedial para Desarrollo de Material Pedagógico orientado a Estudiantes Superiores Regulares y Diversos Funcionales
Authors: Chiavetta Vanina Cecilia , Mongelo Luis Mariano , Dávila Marcela Fabiana , Villarruel María Laura , Díaz Gisela Nancy , Pan Néstor Ariel , Biscaia Elías
Published: April 2021

El presente proyecto de investigación fue concebido antes de que nuestro grupo de investigación conociera sobre la pandemia del Coronavirus que habría de cernirse sobre nuestro planeta. Desde un primer momento, la intención del mismo fue servir de nexo entre docentes y diseñadores multimedia, abocados al objetivo común de desarrollar material pedagógico, mediante técnicas de trabajo colaborativo. Esta intención se vio potenciada por los inconvenientes de adaptación y comunicación que la pandemia traería y nos llevó a adaptar la creación de nuestra herramienta, a la que dimos a llamar H.E.R.A. para que sirva de enlace entre los educadores y los desarrolladores multimediales, creando una base de comunicaciones, con un banco de contenidos digitales para seleccionar y utilizar, poniendo especial atención en el contenidismo para estudiantes con diversidad funcional motriz, auditiva y visual; permitiendo acortar los tiempos de respuesta en la construcción de este material y clasificarlo al mismo tiempo, para ponerlo rápida y sencillamente a disposición de la comunidad de alumnos del sistema de educación superior. Esta herramienta abarca desarrollos de tipo audiovisual, de autoedición, audiolibros y sistema braille entre otros.
Rendimiento estudiantil en tiempo de pandemia: percepciones sobre aspectos con mayor impacto
Authors: Temesio Silvana , García Sofía , Pérez Alén
Published: April 2021

En este artículo se analizan los resultados de una encuesta realizada a estudiantes de grado respecto de su tránsito por el primer semestre en contexto de emergencia sanitaria en la Universidad de la República en Uruguay. Se observa que los estudiantes asocian su rendimiento en primer lugar a aspectos vinculados a su participación y dificultades para llevar a cabo esa participación. Respecto de los aspectos del diseño de los procesos de enseñanza por parte de los equipos docentes, se destacan el tiempo disponible para realizar las evaluaciones, la diversidad de actividades propuestas, los espacios de interacción docente-alumnado, la explicitación de objetivos y la coherencia de la planificación. Se observa, asimismo, la necesidad de interacción con los equipos docentes, presentando insatisfacción cuando esa interacción no es fluida, no hay respuesta a los mensajes o retroalimentación a las tareas.
Aprender y evaluar en la virtualidad: experiencia pedagógica de los profesores de la Universidad Nacional del Nordeste, en un curso de posgrado
Authors: Moreyra Mara Elisabet , Alegre Marcelo , Demuth Patricia
Published: April 2021

El artículo analiza y reflexiona sobre los aprendizajes desarrollados por profesores universitarios al realizar un curso de posgrado denominado “Aprender y evaluar en la virtualidad” destinado a docentes de la Facultad de Humanidades, de la Universidad Nacional del Nordeste, durante el año lectivo 2020, en medio de un contexto educativo de enseñanza remota, atravesado por la emergencia sanitaria a raíz de la Pandemia COVID-19.   Para ello, se realiza una descripción de la experiencia pedagógica enmarcada en la formación en línea, además de un análisis comparativo entre dos cohortes continuas. Se identifican diversos aprendizajes vinculados al rol del tutor virtual, a los dispositivos didácticos y las actividades de aprendizaje y de evaluación, elementos clave para el aprendizaje en línea.
THE TEACHERS’ AND STUDENTS’ PERCEPTION ON ENGLISH TEXTBOOK “WHEN ENGLISH RINGS THE BELL”
Authors: Syifa Dwi Mutiah  , Albiansyah
Published: April 2021

Abstract

The purpose of this study is to compare the student's and teacher’s perceptions about their current English textbook they used. This study categorized as a descriptive qualitative study. The population of VIII grade students (45 students) of junior high school was involved in this study and an English teacher of them too. The questionnaire and semi-structured interview were used as the instrument of this research. Besides, the guideline of the interview and questionnaire was from [1]Cunningsworth's (1995) theory which is explained about the book evaluation. The data were analyzed through Google form percentage presentation for the questionnaire while transcription, coding was used for the interview section. The result showed, 75% of students believed that the book they used has good quality. While the rest 25% felt it did not fulfill their expectation and need. Besides, the teachers’ perception supports it with some of the books’ part lacks organization and employed too many vocabularies. Whereas the students felt their current level was not suitable with the teachers’ beliefs, but the teacher believed that it was appropriate with the students’ level. So, there were few different perceptions between them.  However, the teacher believed that her role in helping students with textbook usage could help the main point of students’ need due to the teacher has lack of knowledge and awareness to do coursebook evaluation. Therefore, further research needs to be done to make this study more comprehensive.
Anti-inflammatory effects of flavonoids in Citrus jabara fruit peels
Authors: Azuma Seisho , Murakami Yoshinobu , Azuma Eiko , Baba Kimiye , Taniguchi Masahiko
Published: April 2021

Currently, about half of people in Japan suffer from allergic diseases. Thus, Citrus jabara fruits have been paid attention as one of quite effective anti-allergic functional foods. C. jabara is an endemic species originally grown only in Kitayama village, Wakayama prefecture in Japan. Although genetic characterization and diversity of various Citrus fruits including C. jabara were researched, but there is room for the study on flavonoids characteristics in C. jabara fruit. For the alleviation of allergic symptom, anti-inflammatory effects are also important. In this study, characteristics of flavonoids in C. jabara fruit peels, and the anti-inflammatory effects of these purified flavonoids were investigated. Our results revealed that C. jabara is a unique Citrus that almost all of flavonoids in fruit peels was narirutin. There was no Citrus species with a flavanone glycosides content ratio like C. jabara. Although anti-inflammatory effects of narirutin was weak, but its aglycone naringenin exhibited following inhibitory effects: nitric oxide synthesis (IC50 = 105 μM), nitric oxide synthase induction, Interleukin-6 synthesis (IC50 = 65 μM), and inducible soluble epoxide hydrolase activity (IC50 = 267 μM). Since narirutin is deglycosylated to naringenin that is then absorbed by colonocytes, it is considered that narirutin exists like a prodrug and its aglycone naringenin works as an active form of anti-inflammatory effect in a living body at oral ingestion of C. jabara fruit peels.
Evaluation of Single Photon and Waveform LiDAR
Authors: Mandlburger Gottfried
Published: April 2021

In this short paper, the principles of single photon sensitive LiDAR are presented and compared against state-of-the-art full waveform, linear-mode LiDAR. The differences are explained in theory, and data of either technology are evaluated based on the City of Vienna dataset, captured in 2018 with the SPL100 (Leica) and VQ-1560i (Riegl), respectively. While SPL features a higher areal performance, waveform LiDAR turns out to be more precise, especially in complex target situations like natural or steep surfaces. Furthermore, the article summarizes current activities within EuroSDR concerning a potential Single Photon and linear-mode LiDAR benchmark.
Floodplain Delineation Based on Analysis of Digital Elevation Model, Soil Maps and Occurrence of Quaternary Formations
Authors: Kozłowska Aleksandra
Published: April 2021

This paper presents a GIS based method of indicating flood extent in a mountainous river basin. Only main river with the valley is object of this analysis. The approach used in this work combines analysis of digital elevation model (DEM) obtained from LIDAR data with presence of alluvial soils and quaternary formations. In addition, in this article an attempt of calculating flood wave height for delineated floodplain is presented. The results are compared with floodplains derived from one of the products of country-scale project „IT system for protection against extraordinary hazards” (ISOK) which are flood hazard maps and with the extent of The Great Flood of 1997. Indication of the area flooded during Poland’s Great Flood in July 1997 is based on the hydrological data from Institute of Meteorology and Water Management – National Research Institute (IMGW – PIB).
Use of carotenoids in feed mixtures for poultry: a review
Authors: Marounek Milan , Pebriansyah Akhir
Published: April 2021

Carotenoids are present in ingredients of feed for poultry. Their content can be further increased by supplementation of feed mixtures with synthetic or natural carotenoids. The present paper recapitulates knowledge on the use of carotenoids in broiler chickens and laying hens, and deals with synthetic or natural carotenoids derived from plants. The review describes effects of carotenoids on productive performance, oxidative stability of poultry products, colouring of yolks and accumulation of carotenoids in yolks. There are several alternatives to synthetic carotenoids which are usable in poultry diets and satisfy the interest of consumers in poultry products free of undesirable side effects.
A Study on Dual Hyperbolic Fibonacci and Lucas Numbers
Authors: Cihan Arzu , Azak Ayşe Zeynep , Güngör Mehmet Ali , Tosun Murat
Published: April 2021

In this study, the dual-hyperbolic Fibonacci and dual-hyperbolic Lucas numbers are introduced. Then, the fundamental identities are proven for these numbers. Additionally, we give the identities regarding negadual-hyperbolic Fibonacci and negadual-hyperbolic Lucas numbers. Finally, Binet formulas, D’Ocagne, Catalan and Cassini identities are obtained for dual-hyperbolic Fibonacci and dual-hyperbolic Lucas numbers.
Trust and Technologies of Sense. VR and Proprioception in Hamlet Encounters
Authors: Ármeán Otília
Published: April 2021

This paper investigates the changing role of media devices in constructing fictive worlds through senses, and the changing relation we have to our senses. The demand for immersion in a virtual visual reality has its precedents, shown for example by the popularity of the kaleidoscope, the peeping box, the Guckkasten, or the panoramas. But while the immersive effect of these illusion spaces was based on visual perception, now we have multisensory interactive spaces that trigger our proprioception (body awareness and feeling of presence). The VR experience Hamlet Encounters offers a unique experience and exemplary use of distance, dislocation, and perception of one’s own senses.
Voiceless Screams: Pictorialism as Narrative Strategy in Horror Silent Cinema
Authors: Enyedi Delia
Published: April 2021

As a complementary condition to narrative, the notion of pictorialism in film is rooted in the first decades of the medium. In their quest to demonstrate the capturing and restoring of images with various devices, early filmmakers selected views with pictorial qualities in the long-standing tradition of painting, transferring them on film in the form of non-narrative shots. The evolution of fictional narratives in silent cinema displaced the source of inspiration in theatre, assimilating its nineteenth-century tradition of pictorialism. Thus, the film audiences’ appeal for visual pleasure was elevated with balanced elements of composition, framing and acting that resulted in pictorially represented moments actively engaged in the narrative system. The paper explores the notion of “pictorial spirit” (Valkola 2016) in relation to that of “monstration” (Gaudreault 2009) aiming to describe the narrative mechanism of provoking fear by means of pictorially constructed cinematic images in a selection of short-length horror silent films belonging to the transitional era, consisting in The Haunted House/The Witch House (La Maison ensorcelée/La casa encantada, Segundo de Chomón, 1908), Frankenstein (J. Searle Dawley, 1910) and the surviving fragments of The Portrait (Портрет, Vladislav Starevich, 1915).1
The Tableau Vivant and Social Media Culture
Authors: Männig Maria
Published: April 2021

The article aims to analyse the tableau vivant in social media culture by emphasizing its intermedial relation to technical visual media, particularly digital photography and film. By focusing on the living picture’s specific mimetic qualities, the study traces back the tableau vivant’s history in a media archaeological perspective primarily regarding photography. It explores the current revival of the tableau vivant within social media. The article examines living pictures and the aspect of self-staging, relevant to contemporary digital culture. The tableau vivant develops between two polarities: a primarily analytical approach that allows a profound exploration of a particular artwork and the performative aspects of self-staging.
η-Ricci solitons in Kenmotsu manifolds
Authors: Baishya Kanak Kanti , Chowdhury Partha Roy
Published: April 2021

The object of the present paper is to study generalized weakly symmetric and generalized weakly Ricci symmetric Kenmotsu manifolds whose metric tensor is η-Ricci soliton. The paper also aims to bring out curvature conditions for which η-Ricci solitons in Kenmotsu manifolds are sometimes shrinking or expanding and some other time remain steady. The existence of each generalized weakly symmetric and generalized weakly Ricci symmetric Kenmotsu manifold is ensured by an example.
Inequalities of Hermite-Hadamard Type for GG-Convex Functions
Authors: Dragomir S. S.
Published: April 2021

Some inequalities of Hermite-Hadamard type for GG-convex functions defined on positive intervals are given. Applications for special means are also provided.
Body fatness in sedentary and active students with different body mass index
Authors: Malara Marzena , Lutosławska Grażyna , Mazurek Krzysztof , Kęska Anna , Tkaczyk Joanna
Published: April 2021

Study aim: Numerous data have indicated that body fat stores undergo complicated regulation by genetic and environmental factors, including physical activity. However, the majority of studies did not take into account this aspect of lifestyle in proposed body fat limits. In this context it seems that a more precise and reliable classification of body fat is provided by the American Council on Exercise (ACE), which distinguishes individuals not only with respect to sex but also activity level.

Material and methods: A total of 793 students (312 sedentary and 481 active) volunteered to participate in the study. Among sedentary participants 147 were male and 165 female. Among active subjects 206 were male and 275 were female. Active subjects were engaged in different modes of physical activity according to the study program. In all participants body mass index (BMI) was calculated. In participants with BMI 18.5–24.9 and BMI ≥ 25 body fat was determined using four skinfold measurements. Thereafter participants were classified according to the percentage of body fat using ranges for males and females provided by the American Council on Exercise (ACE) (essential fat, athletes, fitness, average and obese fatness).

Results: None of the sedentary and active males with BMI 18.5–24.9 had high (obese) fat. In contrast, in sedentary males with BMI ≥ 25 16.4% were obese vs. 1.8% of obese active ones. In sedentary females BMI from 18.5 to 24.9 did not exclude obesity, which was found in 16.9% of participants. In sedentary females with BMI ≥ 25 most of the subjects (97.1%) were obese. In contrast, in active females with BMI ≥ 25 a similar percentage of participants had average and obese fat (53.3% and 46.7, respectively).

Discussion: Our study clearly demonstrated that BMI as a simple measure of body composition provides false information concerning true adiposity in physically active male and female students. A similar BMI did not exclude marked differences in the percentage of body fat in sedentary and active students.
Effect of environmental gradients on diversity and plant community distribution in remnant dry Afromontane forest of Mount Duro, Nagelle Arsi, Ethiopia
Authors: Teshome Mengistu , Asfaw Zebene , Dalle Gemedo
Published: April 2021

For forest ecosystem management to be effective, explicit understanding of the species diversity-environmental relationship along elevation gradient is crucial. This study aimed at identifying and describing plant communities and also documenting their species diversity. Evaluation of relationships between selected environmental variables and species diversity was another objective of this study. Systematic sampling techniques were used to collect vegetation data in a total of forty two sample plots (size=20×20 m). Within main plots, four sub-plots of 5×5 m were established at four corners and – one sub-plot of the same size in the center. These plots were used for shrub and herb diversity assessment. Within each sample plot, all plant species were documented and their scientific names were identified. Environmental variables, such as: elevation, aspect and slope, were also recorded for each main plot. Species diversity was determined using Shannon-Wiener diversity index and evenness in R statistical software. Agglomerative hierarchical clustering method was used for plant community classification. The total of 44 plant species belonging to 30 families was documented. Four plant community types were identified with different diversity, evenness and species richness. These plant communities were: Afrocurpus falcatus-Ficus sur, Maesa lanceolata-Bersama abyssinica, Vernonia myriantha-Urera hypselodendron and Croton machrostachus-Tecleanobilis occurring at average elevation of 2521, 2429, 2329, and 2364 m asl, respectively. Maesa lanceolata-Bersama abyssinica community type exhibited the highest species diversity and evenness followed by Croton machrostachus-Teclea nobilis community type showing the fact that median elevation ranges were rich in species. Elevation and slope gradient explained significant variation in species richness in the studied forest. For effective conservation of biodiversity and sustainable management of the forest ecosystem, further research on the impacts of anthropogenic disturbances and soil properties is recommended as a result of this study.
A Vessel of the Funnel Beaker Culture at Salgótarján-Pécs-Kő
Authors: Horváth Tünde , Kreiter Attila , Viktorik Orsolya
Published: April 2021

This study describes and discusses an old find from a wholly new perspective. The non-local fragment or fragments represent imports or imitations that can be linked to the Funnel Beaker culture and not to Kostolác, Coţofeni, Livezile or Bošáca as originally suggested by József Korek. The hallmarks distinctive to the culture are the ornamented rim exterior and rim interior, the zigzag motif under the rim and the ladder motif on the belly. However, the channelling on the belly is a typical Baden trait, which has not been noted on Funnel Beaker vessels to date. The best and closest analogies can be cited from the Baden settlement at Oldalfala/Stránska–Mogyorós, where they were erroneously identified as Coţofeni/Livezile imports. The occurrence of Funnel Beaker pottery on several sites on the southern fringes of the Western Carpathians suggests a more complex situation; however, their stratigraphic contexts on these multi-period, stratified sites remain unclear due to the field techniques employed during the old excavations. The determination of the exact place of origin is rather difficult within the culture’s vast distribution, although they can most likely be assigned to the Funnel Beaker eastern group, Wiórek phase (IIIB – IIIB-C in the current terminology), whose absolute dates fall between 3700/3600 and 3200 BC. The petrographic analyses revealed that the clay and the tempering agents are of local volcanic origin, providing conclusive evidence that Funnel Beaker vessels had been made locally. In this sense, the pottery fragment discussed here can be best described as a local hybrid product.
Pottery of Pikutkowo Type in the Funnel Beaker Culture: Characteristics, Dispersion and Context
Authors: Kośko Aleksander , Szmyt Marzena
Published: April 2021

The article discusses the current state of knowledge concerning the set of specific pottery characteristics of the Funnel Beaker culture that constitutes the so-called Pikutkowo stylistics. It is especially strongly represented in Kujawy, where the changes in the Pikutkowo set of characteristics define Phases IIIB and IIIB-C dated to 3700-3200 BC. Already in 3700/3650-3500 BC, Pikutkowo pottery appears not only on the Polish Lowland (including Wielkopolska and central Poland as well as the Chełmno Land and Gostynin Lake District), but also on the old Uplands in the upper Vistula basin. The latest data indicate that at the same time Pikutkowo characteristics are also present in Funnel Beaker assemblages from the Subcarpathian foothills and upper Dniester area. It is argued that this wide distribution delimits the Pikutkowo stylistics space, which was a zone of active circulation of cultural patterns within the Funnel Beaker culture. The culture-forming potential of this zone is best seen in the increased transfer of one of the key technological innovations of the Eneolithic, i.e. copper (including arsenic copper) use and processing.
The Deepest Strand. Isiah Berlin and the Intellectual History of Russia
Authors: Ackroyd John
Published: April 2021

Isaiah Berlin’s essays on the nineteenth-century Russian intelligentsia throw light not only on their subject – the role of that group in preparing the ideational ground for the coming revolutions – but more broadly on Berlin’s central philosophical preoccupations and historiographical and hermeneutical assumptions and method. I try to show this – the centrality to his overall project of Berlin’s work on the Russians – by contextualising that work within the broader framework of his philosophical and historical thought.
Assesment of the Impact of Habitat Conditions and Land Use on the Floristic Diversity of Selected Rush Communities
Authors: Grzelak Mieczysław , Gaweł Eliza , Majchrzak Leszek
Published: April 2021

This study concerned the assessment of the effect of various habitat conditions and land use on the habitat diversity of rush communities classified as Phragmitetea. The investigations were conducted in the years 2015-2019 in an area particularly interesting in terms of its nature value and abundant in localities of diverse plant communities, located in ecological areas of permanent grassland in the river valleys of the Noteć Leniwa and the Noteć Bystra, as well as the interlevee floodplain of the Warta in the area of Rakowo. The study area covered 228 ha. Soil moisture content resulting from the habitat mosaic and intensity of land use had a significant effect on the formation of rush communities, their richness and floristic diversity as well as nature and agricultural value. Most communities of nature value were characterised by a mediocre economic value and low fodder value (FVS ranging from 1.1 to 6.9), while some were barren lands. The calculated floristic diversity index (H’) varied and ranged from 1.9 to 3.5, while the harvested dry matter yields ranged from 2.7 to 16.6 t.ha−1. The aim of this study was to assess the effect of habitat conditions and land use on the formation and diversity of rush communities in the Noteć and the Warta river valleys.
Carbon Accumulation Potential from Natural Forest Regrowth of Godech Municipality, Western Bulgaria
Authors: Grigorov Borislav
Published: April 2021

The present research deals with carbon sequestration, as an important process for mitigating the effects of climate change. The investigation focuses on a 30-year period and it covers only aboveground biomass that builds up from natural forest regrowth, excluding any plantation techniques. Potential carbon sequestration rate from natural forest regrowth in Godech Municipality was measured in Mg C ha−1 yr−1 and the resolution of the map was 1x1 km. The results of the study display that carbon accumulation values in the researched area were consistent with those that were expected in the largest parts of Bulgaria. The biggest share of Godech Municipality falls within the range of 0.82 – 0.96 Mg C ha−1 yr−1 with restricted areas around the villages of Barlya, Smolcha, Gubesh, Murgash and Varbnitsa that may accumulate between 0.96 – 1.11 Mg C ha−1 yr−1. In conclusion, carbon accumulation only from natural forest regrowth provides representative information, however it would have been better if different plantation techniques were regarded as well. The successful results of the investigation should encourage other studies of this type in the neighbouring municipalities.
The influence of civil society on Ukrainian anti-corruption policy after the Maidan
Authors: Blatt Felix , Schlaufer Caroline
Published: April 2021

This article examines the influence of civil society on Ukrainian anti-corruption policy after the Maidan in 2014. Drawing on the Advocacy Coalition Framework (ACF), we hypothesise that the Maidan events led to a redistribution of formal legal authority in the anti-corruption policy subsystem, opened access to policy venues for civil society actors, and increased leverage of international organisations to push for strict reforms. We test these expectations with a systematic content analysis of primary documents and semi-structured interviews. Findings show that changes in the formal legal authority to make policy decisions led to anti-corruption policy change. The newly adopted policies were largely influenced by civil society actors who had increased venue access after the Maidan. In addition, civil society advocated for strict anti-corruption reforms through international organisation.
Using Pathological Elements in Analog Circuit Analysis and Simulation
Authors: Grib Alexandru , Erdei Zoltan , Turcu Mihaela Cristina , Constantin Alina , Iordache Mihai
Published: April 2021

This paper is focused on some kind of mystery circuit nullator, nullor, current mirror, and voltage mirror, all of them known as pathological elements. These pathological elements can be used to perform circuit modelling, symbolic circuit analysis, circuit synthesis, circuit design and to develop applications that involve modern active devices. It is described a new modeling of nullor-based active devices from the circuit abstraction level. In this paper it is presented the way all types of equations which describe the circuit containing nullors can be directly formulated from the diagrams of these circuits if we took into account that a nullator is an over-determined two-port circuit element (zero voltage, zero current) and the norator is an undetermined two-port circuit element (any voltage and any current). To simulate the nullors with ideal voltage controlled voltage sources, ec = Ac_c uc, with the control gate an ideal independent current source, jC = 0.0 A and with the amplification (transfer) factor Ac_C very big (theoretically ∞), the analog circuits with nullors can be analyzed by using any of the existing simulation software. By this way, it was possible the elaboration of efficient algorithms for an automatic formulation of Kirchhoff’s equations, of loop equations, of modified nodal equations and of state equations for circuits with pathological elements. These procedures can be easily implemented in dedicated programs for the simulations of the complex analog circuits with pathological elements. The example presented in this paper validates the presented models for nullors.
Species distribution model for Buxbaumia viridis, identifying new areas of presumed distribution in the Czech Republic.
Authors: Číhal Lukáš , Fialová Lucie , Plášek Vítězslav
Published: April 2021

There is a large number of organisms in nature that are hard to find in the field, and one of these is also a rare bryophyte species, Buxbaumia viridis, which can also only be found in a certain part of the year in the production of sporophytes. Using distribution models, however, it is possible to predict the locations which this species is likely to be present at and to focus the field research directly on such sites. Thanks to the presented model, we have succeeded in identifying areas within the Czech Republic with an increased likelihood of its occurrence, even in some areas where no collection of B. viridis has so far been recorded. With the help of the maps created these locations can be identified with the accuracy of approximately 1 km2, making it easier for terrain research and resulting time and often financial expenses. We have also focused on the study of ecological factors that influence the occurrence of the species, and by testing variables from different categories we have come to some agreement with previously published studies. Whilst we have managed to exclude that air pollution has a major role to its occurrence, which has not yet been the subject of any study.
Historical occurrence of the Northern Fulmar (Fulmarus glacialis) on the Vysočina Region (Czech Republic)
Authors: Hudeček Jiří J.
Published: April 2021

Record of the Northern Fulmar, Fulmarus glacialis, near Dlouhá Ves, on the Vysočina Region, in Bohemia, was found in literature which is put with different data. In text be corrected inexact data and emphazise original source's a single datum “from spring 1930”.
Forecasting the Yield Curve for Poland
Authors: Kostyra Tomasz Piotr , Rubaszek Michał
Published: April 2021

This paper evaluates the accuracy of forecasts for Polish interest rates of various maturities. We apply the traditional autoregressive Diebold-Li framework as well as its extension, in which the dynamics of latent factors are explained with machine learning techniques. Our findings are fourfold. Firstly, they show that all methods have failed to predict the declining trend of interest rates. Secondly, they suggest that the dynamic affine models have not been able to systematically outperform standard univariate time series models. Thirdly, they indicate that the relative performance of the analyzed models has depended on yield maturity and forecast horizon. Finally, they demonstrate that, in comparison to the traditional time series models, machine learning techniques have not systematically improved the accuracy of forecasts.
From the Ottoman Empire to pre-Islamic Central Asia: Theatre as an Ideological Tool
Authors: Baş Elif
Published: April 2021

After Mustafa Kemal Atatürk founded the new Turkish Republic in 1923, the country went through a swift and radical transformation. The ruling elite made use of all possible tools to impose the ideals of the new Republic. Their main objective was to break the bonds with the Islamic Ottoman past to establish a new secular national identity. The essence of the new Turkish nation was found in pre-Islamic Central Asia. This view was supported with the help of the Turkish History Thesis, which asserted that the Turks are a supreme race, and their origins are from Central Asia. The state tried to propagate this thesis by various means. The most effective tool that could reach the illiterate people during that period was the theatre. Accordingly, the aim of this article is to explore how the state disseminated the Turkish History Thesis and the values of the new Republic through theatre. The emergence of this new narrative coincided with the tenth anniversary of the Turkish Republic. The plays, written in 1933, especially for this occasion, will be analyzed to determine how they support the Turkish History Thesis and the values of the new nation. Two plays, Akın (The Raid) and its sequel Özyurt (Homeland), will be explored in detail to give an elaborate account of the ideology behind such plays written during that period.
Chronology of the Huxushan Paleolithic Site in South China: Inferred from Multiple Luminescence Dating Techniques
Authors: Lai Hai-Cheng , Li Yi-Yuan , Zhang Jia-Fu , Zhou Liping
Published: April 2021

The Huxushan archaeological site in northern Hunan Province, China, was recently excavated, from which stone tools including handaxes were unearthed. The deposits of the site are chemically weathered, which makes it difficult to date the site using numerical dating techniques except for optically stimulated luminescence (OSL) method. Here, we used various luminescence procedures including single-aliquot regenerative-dose (SAR), sensitivity-corrected multiple-aliquot regenerative-dose (SMAR) and thermally transferred optically stimulated luminescence (TT-OSL) SAR procedures on fine-grained quartz, and two-step post-infrared infrared stimulated luminescence (pIRIR) and multi-elevated-temperature pIRIR (MET-pIRIR) procedures on fine polymineral fractions. The results show that the fine quartz grains have excellent luminescence properties and the quartz SAR-, SMAR- and TT-OSL ages for the samples agree with each other and in stratigraphical order except for one sample. The fine polymineral fractions exhibited relatively weak pIRIR and MET-pIRIR signals, resulting in difficulty in constructing the dose-response curve for MET-pIRIR signals and the stratigraphically inconsistent pIRIR(100, 275) ages. The seven samples yielded their quartz OSL ages ranging from about 62 ka to 133 ka. The two samples from the cultural layer was dated to 78 to 92 ka using different procedures on fine quartz. However, given the systematically older pIRIR ages obtained with the fine polymineral grains for the two samples, their quartz OSL ages are considered to represent the minimal ages of this layer, and their pIRIR(100, 275) ages of 118 and 110 ka represent the upper age limit, indicating that the site was occupied by hominins during Marine Isotope Stage 5.
The Adhesive Response of Regolith to Low-Energy Disturbances in Microgravity
Authors: Jarmak Stephanie , Colwell Joshua , Dove Adrienne , Brisset Julie
Published: April 2021

Small, airless bodies are covered by a layer of regolith composed of particles ranging from μm-size dust to cm-size pebbles that evolve under conditions very different than those on Earth. Flight-based microgravity experiments investigating low-velocity collisions of cm-size projectiles into regolith have revealed that certain impact events result in a mass transfer from the target regolith onto the surface of the projectile. The key parameters that produce these events need to be characterized to understand the mechanical behavior of granular media, which is composed of the surfaces of small bodies. We carried out flight and ground-based research campaigns designed to investigate these mass transfer events. The goals of our experimental campaigns were (1) to identify projectile energy thresholds that influence mass transfer outcomes in low-energy collision events between cm-size projectiles and μm-size regolith, (2) to determine whether these mass transfer events required a microgravity environment to be observed, and (3) to determine whether the rebound portion of these collision events could be replicated in a laboratory drop tower environment. We found that (1) mass transfer events occurred for projectile rebound accelerations <7.8 m/s2 and we were unable to identify a corresponding impact velocity threshold, (2) mass transfer events require a microgravity environment, and (3) ourdrop tower experiments were able to produce mass transfer events. However, drop tower experiments do not exactly reproduce the free-particle impacts and rebound of the long-duration microgravity experiments and yielded systematically lower amounts of the overall mass transferred.
Shared Metabolic Remodeling Processes Characterize the Transcriptome of Arabidopsis thaliana within Various Suborbital Flight Environments
Authors: Califar Brandon , Zupanska Agata , Callaham Jordan A. , Bamsey Matthew T. , Graham Thomas , Paul Anna-Lisa , Ferl Robert J.
Published: April 2021

The increasing availability of flights on suborbital rockets creates new avenues for the study of spaceflight effects on biological systems, particularly of the transitions between hypergravity and microgravity. This paper presents an initial comparison of the responses of Arabidopsis thaliana to suborbital and atmospheric parabolic flights as an important step toward characterizing these emerging suborbital platforms and their effects on biology. Transcriptomic profiling of the response of the Arabidopsis ecotype Wassilewskija (WS) to the aggregate suborbital spaceflight experiences in Blue Origin New Shepard and Virgin Galactic SpaceShipTwo revealed that the transcriptomic load induced by flight differed between the two flights, yet was biologically related to traditional parabolic flight responses. The sku5 skewing mutant and 14-3-3κ:GFP regulatory protein overexpression lines, flown in the Blue Origin and parabolic flights, respectively, each showed altered intra-platform responses compared to WS. An additional parabolic flight using the F-104 Starfighter showed that the response of 14-3-3κ:GFP to flight was modulated in a similar manner to the WS line. Despite the differing genotypes, experimental workflows, flight profiles, and platforms, differential gene expression linked to remodeling of central metabolic processes was commonly observed in the flight responses. However, the timing and directionality of differentially expressed genes involved in the conserved processes differed among the platforms. The processes included carbon and nitrogen metabolism, branched-chain amino acid degradation, and hypoxic responses. The data presented herein highlight the potential for various suborbital platforms to contribute insights into biological responses to spaceflight, and further suggest that in-flight fixation during suborbital experiments will enhance insights into responses during each phase of flight.
Principles of liability under the Polish Criminal Code for behavior relating to the termination of pregnancy undertaken in Poland and the Czech Republic
Authors: Sitarz Olga , Jaworska-Wieloch Anna
Published: April 2021

The article explores the problem of significance the termination of pregnancy in the context of criminal responsibility. In the first step, the legal analysis is focused on establishing the change of legal status connected with abortion and all the consequences for criminal responsibility. The second section refers to the current act, trying to find the answer how to recognized the termination of pregnancy. The third part refers to legal situation in Czech Republic at this area. Finally, some reflections on the criminal liability for the place of the offence have been presented. The possibility of conviction for abortion in a country where it is legal should be examined..
Shoot-out right
Authors: Janáč Viliam
Published: April 2021

The article provides a basic analysis of the shoot-out right, in particular as regards the mechanism of its functioning. The shoot-out right is an instrument for handling of conflict situations in a company, where the exercise of this right is usually connected with exit of one of the shareholders and domination of the company by the remaining shareholder. At first sight, the shoot-out right is an elegant and fair solution for overcoming a shareholder conflict, which could threaten the very existence of the company. However, this right, and in particular its exercise, brings some risks.
Contrasting Aspects in Noncompaction Cardiomyopathy
Authors: Ciobîcă Lucian-Mihai , Ionescu Oana-Petronela , Stanciu Silviu
Published: April 2021

Left ventricle noncompaction or noncompaction cardiomyopathy is a rare cause of cardiomyopathy, presumed to be the consequence of the cessation of the embryological phenomenon of progressive compaction of the ventricular myocardium (which normally occurs between the 5th and 8th week) with the persistence, to varying degrees, of prominent trabeculae and deep intertrabecular spaces Placed as an unclassified cardiomyopathy, this pathology is of interest due to different contrasting aspects observed in its evolution over time. The article reviews the etiopathogenic hypotheses, the diagnostic criteria according to the imagery used, the clinical forms of presentation and certain general principles of treatment. To illustrate the imagery used in this heart disease, the article has attached images of a case of noncompaction cardiomyopathy in a 26-year-old patient with left ventricular ejection fraction of 17% (measured by cardiac magnetic resonance imaging). Finally, the idea of the need for multicenter studies to establish whether this cardiomyopathy is an independent disease or a distinct phenotype which is not necessarily pathological is supported.