bluuebunny/crossref_metadata_2025 huggingface dataset:
Revisiting the Concept of Debordering: The Case of the Slovenian-Hungarian Border Region
Authors: Senčar Tatiana Bajuk
Published: May 2021

The following essay examines the concept and practice of debordering as an element of EU integration with the aid of ethnographic research on local actors’ experiences with EU cross-border programs in the Slovenian-Hungarian border region. The analysis is based on defining and distinguishing among the historical, normative, and analytical dimensions of debordering, focusing on critical analyses of its uses as an analytical concept. The author proposes a more grounded approach to debordering by contextualizing interlocutors’ narrated border experiences in a broader analytical and interpretative framework.
Challenges of Cross-Border Cooperation: The Initiative of Trilateral Goričko–Raab–Őrség Nature Park
Authors: Pisk Marjeta
Published: May 2021

The trajectories of social actions comprising nature conservation and regional economic development in the Slovenian-Austrian-Hungarian tri-border area discussed in this paper are closely linked to the landscape of the Slovenian-Austrian-Hungarian border. Processual understanding bounds landscape to human activities and other non-human agents, all of whom constitute the landscape-in-the-making. The Őrség National Park and Goričko Landscape Park, as designated nature reserves, are subject to human influences through their protection and, as intrinsically objects of human agency, are rich sites of social production and interaction. The cross-border initiative of the Trilateral Goričko–Raab–Őrség Nature Park is analyzed through the politics of European integration and territorial cooperation in the peripheral regions and their financial programs. Through field research and interviews with social actors, the complexity of the obstacles that hinder the functioning and effective management of the actions of the proposed Trilateral Nature Park initiative and the ambivalent attitude of the inhabitants towards the actions of the three parks is observed.
Asymmetric Wildlife in the Goričko Nature Park: Protecting (from) Species
Authors: Kozorog Miha
Published: May 2021

This paper presents an asymmetry of meanings and values that different human agents who occupy the same geographical space ascribe to distinct wildlife species. This asymmetry is the result of these agents’ roles in the area and their contrasting epistemologies. The agents in question comprise the Goričko Nature Park as a conservation institution and inhabitants of the park, especially farmers. In most parks, the relationship between professionals and inhabitants is crucial to the park’s sustainability. Therefore, the aim of the paper is to point at a selected neuralgic point which divides the two. At stake is that both agents ascribe importance to wildlife species, but to different ones and for different reasons. While the park focuses on protected species, inhabitants are occupied with non-protected ones. Whereas the park projects positive values on species of its concern, inhabitants ascribe negative characteristics to species of their concern. The paper illustrates these disparate attitudes to wildlife and calls for a less biased park agenda which could benefit the park’s conservation project, yet it also acknowledges the lack of resources which hinders the park in properly fulfilling its role in the local web of relationships.
On Self-Adjoint Linear Relations
Authors: Berkics Péter
Published: May 2021

A linear operator on a Hilbert space , in the classical approach of von Neumann, must be symmetric to guarantee self-adjointness. However, it can be shown that the symmetry could be omitted by using a criterion for the graph of the operator and the adjoint of the graph. Namely, S is shown to be densely defined and closed if and only if .

In a more general setup, we can consider relations instead of operators and we prove that in this situation a similar result holds. We give a necessary and sufficient condition for a linear relation to be densely defined and self-adjoint.
Lower Estimate of Clique Size via Edge Coloring
Authors: Király Balázs , Szabó Sándor
Published: May 2021

In many clique search algorithms well coloring of the nodes is employed to find an upper bound of the clique number of the given graph. In an earlier work a non-traditional edge coloring scheme was proposed to get upper bounds that are typically better than the one provided by the well coloring of the nodes. In this paper we will show that the same scheme for well coloring of the edges can be used to find lower bounds for the clique number of the given graph. In order to assess the performance of the procedure we carried out numerical experiments.
The Principal Fibre Bundle on Lorentzian Almost R-para Contact Structure
Authors: Das Lovejoy S. , Khan Mohammad Nazrul Islam
Published: May 2021

The purpose of this paper is to study the principal fibre bundle (P, M, G, πp ) with Lie group G, where M admits Lorentzian almost paracontact structure (Ø, ξp, ηp, g) satisfying certain condtions on (1, 1) tensor field J, indeed possesses an almost product structure on the principal fibre bundle. In the later sections, we have defined trilinear frame bundle and have proved that the trilinear frame bundle is the principal bundle and have proved in Theorem 5.1 that the Jacobian map π* is the isomorphism.
Some Zero-One Linear Programming Reformulations for the Maximum Clique Problem
Authors: Beke Ákos , Szabó Sándor , Zavalnij Bogdán
Published: May 2021

Many combinatorial optimization problems can be expressed in terms of zero-one linear programs. For the maximum clique problem the so-called edge reformulation is applied most commonly. Two less frequently used LP equivalents are the independent set and edge covering set reformulations. The number of the constraints (as a function of the number of vertices of the ground graph) is asymptotically quadratic in the edge and the edge covering set LP reformulations and it is exponential in the independent set reformulation, respectively. F. D. Croce and R. Tadei proposed an approach in which the number of the constraints is equal to the number of the vertices. In this paper we are looking for possible tighter variants of these linear programs.
Dual Pairs of Matroids with Coefficients in Finitary Fuzzy Rings of Arbitrary Rank
Authors: Wenzel Walter
Published: May 2021

Infinite matroids have been defined by Reinhard Diestel and coauthors in such a way that this class is (together with the finite matroids) closed under dualization and taking minors. On the other hand, Andreas Dress introduced a theory of matroids with coefficients in a fuzzy ring which is – from a combinatorial point of view – less general, because within this theory every circuit has a finite intersection with every cocircuit. Within the present paper, we extend the theory of matroids with coefficients to more general classes of matroids, if the underlying fuzzy ring has certain properties to be specified.
La comprensión de textos propedéuticos filosóficos apoyada en la lectura de pinturas de Joan Miró
Authors: Bautista Urueña Keisy Dallana , Caro Lopera Miguel Ángel
Published: May 2021

El objetivo de este artículo es reconocer los elementos conceptuales, procedimentales y actitudinales que permitan la comprensión de Textos Propedéuticos Filosóficos (TPF) apoyada en la lectura de pinturas de Joan Miró; esto con la meta de configurar una propuesta didáctica, dirigida a los estudiantes de la Licenciatura en Literatura y Lengua Castellana de la Universidad del Quindío. Para ello se tomó como base los presupuestos teóricos de J. Petöfi y su teoría de la TesWeST, mientras que en lo metodológico se asumió un diseño mixto, desde los enfoques histórico-hermenéutico y de investigación acción. En un primer momento, se presentan los antecedentes de la investigación; luego, se exponen los presupuestos teóricos que soportan el trabajo, con especial énfasis en los de didáctica, comprensión lectora, TPF, lectura de imágenes y pinturas de Joan Miró. Más adelante, se describe la metodología y la propuesta de intervención diseñada. A continuación, se muestran los resultados obtenidos en la ejecución de la propuesta; y, para terminar, se dan a conocer las conclusiones, las cuales apuntan hacia la puesta en marcha de estrategias metacognitivas que vehiculan relaciones desde las obras de Joan Miró, con miras a cualificar la comprensión lectora de textos filosóficos.
Prospección del sistema educativo mexicano a partir de las experiencias aprendidas por el COVID-19
Authors: Velázquez -Cigarroa Erasmo , Tello -García Enriqueta
Published: May 2021

El presente trabajo pretende identificar los impactos generados por la pandemia COVID-19 en el sistema educativo mexicano, para definir variables que permitan la continuidad de las actividades académicas durante el tiempo del confinamiento y al momento de la incorporación a la nueva normalidad, con un estudio exploratorio a través de un enfoque cualitativo orientado al análisis de esta problemática iniciada en el 2020. Por tanto, se reflexiona sobre la realidad educativa en México como resultado del impacto del coronavirus, el cambio tan agresivo que sufrió el desarrollo de la educación al cerrarse las instalaciones educativas como medidas de prevención de contagios, la importancia de la Tecnología de la Información y Comunicación (TIC´s) y su relación con el modelo educativo para hacer frente al rezago escolar. Por último, es importante generar una visión integral para hacer propuestas concretas y contar con estrategias didácticas, mediante la alfabetización digital, para atender a las necesidades emergentes en términos educativos.
Asteraceae na microrregião do Curimataú Ocidental, Estado da Paraíba, Brasil
Authors: Soares Gleison , Santos Carlos Alberto Garcia , Loeuille Benoît
Published: May 2021

RESUMO As formações de caatinga compreendem o mais importante mosaico vegetacional da região Nordeste. Asteraceae constitui uma das cinco famílias mais ricas em número de espécies para essas áreas, no entanto é constantemente negligenciada em estudos florísticos e taxonômicos. O objetivo deste trabalho foi realizar o levantamento florístico desse grupo na microrregião do Curimataú Ocidental, Estado da Paraíba, considerada uma área com poucas informações acerca da sua biodiversidade, em especial da flora. Baseamos este estudo em coletas mensais entre abril/2018 a setembro/2019 nos mais diversos pontos da área e na consulta às coleções dos principais Herbários dos Estados da Paraíba e de Pernambuco. Registramos 36 gêneros e 38 espécies. São apresentadas chaves de identificação, descrições, ilustrações e imagens para os taxóns amostrados.
Successful treatment of epilepsia partialis continua with perampanel: two pediatric cases
Authors: Mir Ali , Almudhry Montaha , Al‐Ghamdi Fouad , Bashir Shahid
Published: May 2021

Epilepsia partialis continua (EPC) is a form of focal motor status epilepticus, associated with multiple etiologies. Etiology‐specific treatments, such as hemispherotomy for Rasmussen encephalitis, lesionectomy for focal cortical dysplasia, and metabolic correction for non‐ketotic hyperglycemia, have proven to be efficacious in treating EPC, but, in general, EPC is difficult to treat and often drug‐resistant, and there is little evidence to guide therapy. We report the successful treatment of EPC with perampanel in two pediatric patients. The first patient was a 12‐year‐old boy with neuronal ceroid lipofuscinosis (NCL) who started to have EPC around the age of 10 years, characterized by left hemifacial myoclonic twitches and hemi‐body jerks that were almost continuous throughout the day and disappeared during sleep. He had failed several antiepileptic drugs (AEDs). The EPC stopped within three days of initiating perampanel. The second patient was a six‐year‐old boy withPOLG‐related mitochondrial disease who presented to the emergency room with continuous jerky movements of the right arm and face after a trivial head injury. After failing several AEDs, including a midazolam drip, the EPC was controlled with perampanel. Both patients showed dramatic improvement and continue to show sustained efficacy after around five months of follow‐up. Based on our observations, perampanel, which has a unique mechanism of action, appears to be a promising therapeutic option for treating EPC. [Published with video sequence].
Depression in patients with epilepsy during the COVID‐19 pandemic based on longitudinal self‐reporting
Authors: Sun Lingqi , Mo Qianning , Sun Hongbin , Niu Yulong , Si Yang
Published: May 2021

Objective. The current study screened major depression in people with epilepsy (PWE) during the epidemic of the novel coronavirus‐related disease COVID‐19, in order to identify whether the outbreak generated negative psychological impact on PWE.

Methods. A Chinese version of the Neurological Disorders Depression Inventory for Epilepsy (C‐NDDI‐E), a self‐reporting depression inventory, was applied for rapid detection of major depression. Assessment was carried out online during three different periods (prior to, during, and after the outbreak of COVID‐19), with the aim of identifying changes in prevalence of depression and associated risk factors.

Results. A total of 158 PWE were recruited into the study (48.7% female). The questionnaire completion rates were 94.3% and 70.9% during and after the outbreak, respectively. The prevalence of depression prior to the epidemic, as the baseline, was 34.8% and increased to 42.3% during the period of the epidemic. Towards the end of the outbreak, the prevalence declined towards the baseline (36.6%). Factors such as living alone (OR = 4.022, 95% CI: 1.158‐13.971, P = 0.028) and active seizures before the epidemic (OR = 2.993, 95% CI: 1.197‐7.486, P = 0.019) were associated with depression during the epidemic. Monotherapy appeared to be protective against depression (OR = 0. 105, 95% CI: 0.047‐0.235, P <0.001).

Significance. Our results suggest that the pandemic exerts negative influence on PWE's mental health. Depression is one of the common psychological disorders that needs greater attention during this extraordinary period.
Evaluation of EEG training curricula for non‐specialist clinicians: a systematic qualitative review
Authors: Kander Veena , Hardman Joanne , Wilmshurst Jo M.
Published: May 2021

Objective. Neurologists and epileptologists are scarce in sub‐Saharan Africa (SSA). Whilst electroencephalograms (EEGs) are becoming more available in the region, interpretation is typically undertaken by non‐specialist clinicians with limited or no training. This is a systematic review of the peer‐reviewed literature on EEG training of non‐specialist clinicians worldwide, assessing the efficacy of the training methodology and the curricula content.

Methods. The published literature was searched for papers relating to EEG training of non‐specialist clinicians worldwide (1/01/1989‐30/06/2020). All regions of the world were included and assessed for content on efficacy of curricula and potential adaptability or applicability to resource‐poor settings. The grey literature was searched using ProQuest and Primo databases and references from review articles. The websites of the International League Against Epilepsy, International Federation of Clinical Neurophysiologist, American Academy of Neurology and World Federation of Neurology were reviewed for reports (non‐peer reviewed) which described roll‐out and impact of novel EEG training curricula.

Results. There was limited data. From 2,613 articles, 15 complied with the study question. Ten studies were performed on cross‐speciality clinicians, four on neurology registrars and one on a combination of healthcare workers. There was diversity of curricula models used. The studies themselves lacked consistency and directness. A few training programs were trialled in low‐middle‐income countries (LMICs) and paediatric training was included in only two. An ideal training curriculum was not evident nor evaluated for resource‐poor settings. However, diverse teaching models were reported and set the foundations for further development of EEG training curricula for non‐specialist clinicians.

Significance. There is a lack of access to education in EEG training and interpretation for non‐specialist clinicians in LMICs. Existing models need to be expanded or adapted and evaluated for this population group.
Mild malformation of cortical development with oligodendroglial hyperplasia and epilepsy (MOGHE): a widespread disease with an apparently focal epilepsy
Authors: Seetharam Raghavendra , Nooraine Javeria , Mhatre Radhika , Ramachandran Jaychandran , Iyer Rajesh B. , Mahadevan Anita
Published: May 2021

Mild malformation of cortical development with oligodendroglial hyperplasia and epilepsy (MOGHE) is a recently recognized, highly epileptogenic, distinct histopathological entity in drug‐resistant epilepsy that primarily involves the frontal lobes. Surgical outcomes in MOGHE are variable. Although the diagnosis is based on histopathology, high‐resolution MRI helps to differentiate MOGHE preoperatively from other forms of cortical malformations (i.e., mMCD II and FCD IIa). We discuss the clinical, electrographic, radiological and histopathological characteristics of MOGHE in two patients who underwent evaluation for drug‐resistant epilepsy followed by electrocorticography‐based resection. Both patients presented with childhood‐onset refractory frontal lobe epilepsy with a high seizure burden. Interictal epileptiform discharges were widespread. PET abnormalities were disproportionate to the MRI findings. Cognitive impairment, persistent epileptiform discharges on post‐resection electrocorticography and sub‐optimal surgical outcomes suggest that MOGHE is a widespread pathology in focal epilepsy.
A Rare Case of a Woman Presenting with Axillary Silicone Lymphadenopathy Accompanied by Extracapsular Siliconoma and Thickened Capsule after an Implant-based Augmentation Mammaplasty
Authors: JH Kim
Published: May 2021

According to a review of literatures, silicone-induced lymphadenopathy occurs in association with rupture or silicone leakage. It has been reported to cause inflammation, neuropathy or systemic disorder. It should therefore be detected both correctly and promptly. The author experienced a rare case of a 38-year-old woman presenting with axillary silicone lymphadenopathy due to rupture of a silicone gel-filled breast implant. The patient received primary augmentation mammaplasty using a breast implant at other hospital; the current case highlights the importance of an ultrasoundassisted diagnosis of silicone lymphadenopathy before reoperation in a patient with rupture.
Gender differences in business structures created in the areas of production and transport in 2018
Authors: Pinkovetskaia Iuliia S.
Published: May 2021

Purpose. In recent years, there has been an increase in the role of entrepreneurship in modern national economies. The article is devoted to the actual problem of assessing entrepreneurial activity in four sectors: agricultural production, mining, manufacturing and transport. At the same time, gender differences in entrepreneurial activity by country are considered. Objectives. The author examines the specific weights of entrepreneurs whose firms are specialized in the four above-mentioned types of economic activity, taking into account the existing gender differences, in the total number of women and men entrepreneurs. The study was based on the principles and concepts of differentiation of entrepreneurship by type of economic activity. Methods and data. The research process included five stages. The results of surveys of entrepreneurs conducted in 59 countries during the implementation of the Global Entrepreneurship Monitoring Project were used as initial information in the study. In the course of the study, economic and mathematical modeling was carried out using the density functions of the normal distribution. At the same time, the theoretical basis for the development of such functions for describing probabilistic processes was taken into account. Results. The study solved the problems of evaluating the values of six indicators that characterize firms in agriculture, mining, manufacturing and transport according to data for 2018. In addition, the ratios characterizing the prevalence of specific weights for men and women in each of the countries under consideration were determined. A comparative analysis was carried out, which allowed us to identify the countries that were characterized by the maximum and minimum values of the indicators. The comparison of the values of indicators for Russia and foreign countries is carried out. Conclusions. The study showed that the proportion of women and men who created businesses in the agricultural, mining, manufacturing and transport industries was 17% and 25%, respectively. In 2018, there were gender differences in the specialization of entrepreneurs. The conclusions presented in the article have a significant novelty and originality. They can be used in the activities of public administration bodies, as well as in further research.
Housing Vienna: The Socio-Spatial Effects of Inclusionary and Exclusionary Mechanisms of Housing Provision
Authors: Friesenecker Michael , Kazepov Yuri
Published: May 2021

The provision of housing plays a decisive role in segregation processes. In a European context increasingly influenced by variegated neo-liberal housing policies, Vienna’s approach is characterised by generous access to social housing. This inclusive strategy aims at actively preventing segregation and the isolation of certain groups. Over the last 30 years, however, reconfigured multi-level arrangements and wider contextual changes have transformed Vienna’s housing governance. This article explores how. In particular, it aims at disentangling the relationship between housing policy reforms at multiple policy levels and the changes of the mechanisms shaping the access to tenure segments and residential segregation in Vienna. Through the use of process tracing, we identify critical junctures of housing governance and relate them to housing segmentation and segregation measures over a period of approximately 30 years. Our findings show that reforms on multiple levels produce an increasingly deregulated private rental market and an increasingly fragmented access to a diversified provision of social housing. From a spatial point of view, persistent patterns of segregation blend with new ones, leading to decreasing segregation characterised by a more even spatial distribution of low and high-status groups. At the same time, both groups show very low, but slightly increased levels of isolation. Tenant profiles in social housing are, however, generally still very mixed. Balancing the trade-off between a social mix and social targeting without excluding residents in need will remain the main challenge for Vienna’s social housing model.
Inequality on the Increase: Trajectories of Privilege and Inequality in Madrid
Authors: Sorando Daniel , Uceda Pedro , Domínguez Marta
Published: May 2021

In Spain, housing is one of the main axes of social inequality. Its position within Spain’s economic model and welfare system is key to understanding why its financialization at the beginning of the 21st century had such different consequences among residents as well as territorially. In this context, from 2001 to 2011, Madrid became one of the most segregated metropolitan areas in Europe. This article delves into how both housing and its location organise inequality in different social spheres and reproduce it over time. To this end, the geography of this inequality is analysed in different social residential trajectories, along with how segregation produces its own dynamics of inequality. The analysis is based on census data and applies a combination of factor and cluster analyses. The results reveal important processes of social residential marginalisation articulated by the interaction between high international immigration and the spatial manifestation of the housing bubble. The main socio-spatial result of this process is the disappearance of mixed social spaces in Madrid, previously located in the centre of the city. This dynamic produces opposite territories in terms of advantage and disadvantage in different spheres linked to social inequality such as education, health, leisure, care and even prejudice. In the process, impoverished immigrants disperse towards the neighbourhoods that concentrate the greatest disadvantages in each of these spheres.
Okul Yöneticisi ve Öğretmenlerin Bakış Açısıyla Uzaktan Öğretim Kavramı
Authors: DEMİRBİLEK Nesip , HAN Ferhat , DEMIRTAS Hasan , ATİLA Fulya
Published: May 2021

Bu araştırmanın amacı okul yöneticisi ve öğretmenler tarafından uzaktan öğretim olgusunun nasıl algılandığını metaforlar aracılığı ile belirleyebilmektir. Araştırmada nitel araştırma yöntemlerinden olgu bilim (fenomonolojik) deseni kullanılmıştır. Araştırmanın çalışma grubunun belirlenmesinde kolay ulaşılabilir durum örnekleme tekniği kullanılmıştır. Araştırmada, 2020-2021 eğitim-öğretim yılında Bingöl ilinde görev yapan 179 okul yöneticisi ve öğretmen gönüllü olarak yer almıştır. Araştırmada, metafor cümlesi ve kişisel bilgileri içeren form Google formda hazırlanmıştır. Hazırlanan form, okul yöneticisi ve öğretmenlere mail, What Sapp, Facebook gibi sosyal medya araçları ile gönderilmiştir. Katılımcılardan “Uzaktan öğretim… gibidir/benzemektedir. Çünkü …” cümlesini tamamlamaları istenmiştir. Çalışmada elde edilen verilerin analizinde “içerik analizi” tekniğinden yararlanılmıştır. Araştırma sonucunda kadın ve erkek katılımcıların uzaktan öğretim kavramına yönelik oluşturdukları metaforlar analiz edildiğinde büyük çoğunluğunda uzaktan öğretimin yetersiz, etkisiz, etkileşimsiz, imkâna bağlı bir öğretim şekli olduğuna vurgu yapıldığı tespit edilmiştir. Kategorilere ait örnek açıklamalar incelendiğinde çoğunluğun olumsuz nitelik taşıdığı görülmüştür. Katılımcıların uzaktan öğretime ilişkin algılarını ifade ettikleri metaforların cinsiyet açısından dağılımları incelendiğinde ise, kadın katılımcıların genel olarak uzaktan öğretimi yetersiz olarak, erkek katılımcıların ise etkisiz olarak algıladıkları bulgusuna rastlanmıştır. Bulgulara bakıldığında katılımcıların uzaktan öğretime ilişkin algılarını belirttikleri metaforlar arasında cinsiyet açısından önemli bir farklılığın olmadığı ifade edilebilir. Politika geliştiriciler tarafından öncelikle negatif metaforlara değinilen konular üzerinde durulması ve bu konularda başka uygulamalar geliştirilerek iyileştirmeler yapılması önerilmektedir.
The uniform strong law of large numbers without any assumption on a family of sets
Authors: Bogdanskii V. Yu. , Klesov O. I.
Published: May 2021

We study the sums of identically distributed random variables whose indices belong to certain sets of a given family A in R^d, d >= 1. We prove that sums over scaling sets S(kA) possess a kind of the uniform in A strong law of large numbers without any assumption on the class A in the case of pairwise independent random variables with finite mean. The well known theorem due to R. Bass and R. Pyke is a counterpart of our result proved under a certain extra metric assumption on the boundaries of the sets of A and with an additional assumption that the underlying random variables are mutually independent. These assumptions allow to obtain a slightly better result than in our case. As shown in the paper, the approach proposed here is optimal for a wide class of other normalization sequences satisfying the Martikainen–Petrov condition and other families A. In a number of examples we discuss the necessity of the Bass–Pyke conditions. We also provide a relationship between the uniform strong law of large numbers and the one for subsequences.
On Hasse diagrams connected with the poset (1, 2, 7)
Authors: Stoika M. V. , Styopochkina M. V.
Published: May 2021

Representations of posets introduced in 1972 by L. O. Nazarova and A. V. Roiter, arise when solving many problems in various fields of mathematics. One of the most important problem in the theory of representations of any objects is a description of the cases of representation finite type and representation tame type. The first of these problems for posets was solved by M. M. Kleiner, and the second L. O, Nazarova. M. M. Kleiner proved that a poset has finite type if and only if it does not contain subsets of the form (1, 1, 1, 1), (2, 2, 2), (1, 3, 3), (1, 2, 5) and (И, 4), which are called the critical sets. A generalization of this criterion to the tame case was obtained by L. O. Nazarova. The corresponding sets are called supercritical and they consist of the posets (1, 1, 1, 1, 1), (1, 1, 1, 2), (2, 2, 3), (1, 3, 4), (1, 2, 6) and (И, 5). V. M. Bondarenko proposed a generalization of the critical and supercritical posets, calling them 1-oversupercritical. This paper studies the combinatorial properties of one of such sets.
Characteristic Cauchy’s problem with prehistory in the case of nonlinear differential equations in partial derivatives
Authors: Kohutych O. I. , Marynets V. V.
Published: May 2021

We have built a constructive method of investigation and approximate solution for nonlinear Gursa’s problem with prehistory. We have established sufficient condition of subsistence, existence of unity and constant signs solution of the investigated problem. At mathematical description to different nature process (gas sorption, the spread of moisture in the porous substances, pipes heating by a stream of hot water, drying by the airflow, etc. [1]) we often come to boundary value problems for nonlinear differential equations in partial derivatives, when not all output data are known, that is some of them need to be found from auxiliary nonlinear problems, which are mathematical models of processes that proceeded the research. These problems should be named as problems with prehistory. One approach to investigation and approximate solution to such a problem has been proposed in the current paper.
Features of the Development of a Teenager's Subjectivity in Interaction with the Natural Environment in a Children's Educational and Health Camp
Authors: Kamnev A.N. , Mikhailova T.A.
Published: May 2021

The work shows that only a certain psychological and pedagogical complex, consisting of a convenient educational platform, using objects of nature in the pedagogical process; correctly selected psychological and pedagogical methods and a trained teaching staff will be able to contribute to the search and implementation of new psychological and pedagogical approaches used for the development of personality and subjectivity of adolescents. The most convenient site for these purposes may be a children's health camp. This educational platform is unique in terms of balancing lesson and extracurricular activities, providing opportunities for communicative interaction between peers, as well as adolescents and adults. It is also important that the environment of a country camp provides a child with the opportunity to discover those natural phenomena that could only be learned theoretically in the classroom. By contributing to the implementation of interdisciplinary environmental research projects, the camp creates conditions for the development of the adolescent's subjectivity in interaction with the natural environment. Receiving new skills and abilities in the camp, the child moves to a new level of education, and accordingly acquires new personal experience. Thus, the presented work shows that it is necessary to rethink the importance of children's health camps. While retaining the traditional functions of health improvement, recreation and entertainment, camps should provide and compensate for the educational and educational functions of modern school education. Camp activities should be productive.
Neuroaxial anesthesia caused paraplegia: a case report
Authors: Cortés-Badillo Luis David , Reyes-Gutiérrez Agustín , Gómez-Chaccón Óscar , Olivera-León Luis David , Olivera-León Elsy Daniela , Granados-Romero Juan José , Barrera-Mera Baltazar , Banegas-Ruiz Rodrigo , Vargas-Morales José Juan , Barrera-Calva Elvira , Gómez-Mendoza Francisco Fabián , Baca-Domínguez Carlos Rubén , Pérez Ortega Emilio , Mendoza-Aceves Rodrigo A. , Radilla-Flores Mariana Del Carmen , Espinosa Queb Nelson Niels , Corona Figueroa Alejandro Ángel , Salazar Trujillo Bruno Andrés , Gutiérrez-Hernández Mario , Valderrama-Treviño Alan Isaac
Published: May 2021

Patients who undergo; anesthesia, neuraxial analgesia, or some type of neuraxial blockage are exposed to multiple complications. 33-year-old male patient, suffers a femur fracture with a long oblique trace causing pain and functional limitation for movements. Surgical resolution is determined using neuraxial block at L2-L3 level, and intravenous sedation. During his postoperative follow-up, a decrease in strength was confirmed in the lower limbs with 0/5 on the Daniels scale, 100% sensitivity without sphincter control, steroids were prescribed along with magnetic resonance imaging and a neurosurgical evaluation was requested. The MRI shows bulging of the fibrous annulus that obliterates the epidural fat and makes contact with the thecal sac in the L5-S1 intervertebral disc level. The neurosurgery service prescribes rehabilitation sessions at home, electrostimulation and neuropathic medications. Patient was discharged with rehabilitation sessions at home and medical treatment. In his last consultation, an evaluation from the psychiatry department was requested for ideas of disability, hopelessness, fantasies of death without a suicide plan related to limitations and loss of functionality. Patient does not return to external follow-up, cannot be located.
An unusual presentation of foreign body rectum
Authors: Paruthy Samir , Paruthy Shivani B.
Published: May 2021

Retrieval of rectal foreign body (FB) is a surgical dilemma. Variables including FB size, shape, make, time of insertion, presentation in ER, associated injuries, local edema, contamination, reluctance to seek medical aid, multiple unsuccessful attempts for self-retrieval masked by improper history and concealing the actual facts makes surgical management challenging. In this study, two unusual cases of FB in rectum and retrievals were presented. Case 1 was a 22 year old boy with a metallic glass tumbler in rectum reported after 12 days with constipation and pelvic pain. Repeated self-attempts for removal by the patient further pushed the FB upwards. Retrieval of rectal FB was done from rectum with repair and diversion colostomy which was closed later. Patient confessed this was his thirteenth attempt with the same object with successful retrieval all the time in last nine months. Case 2 was a 27 year old boy who inserted a sharp iron rod (used for picking ice) in the anal region which migrated to sigmoid colon without perforation of the viscera. Patient reported after three days with sharp shooting pain in left lower abdomen which aggravated on defecation. Abdominal examination revealed no sign of peritonitis, X-ray and CECT abdomen unexpectedly revealed no viscera perforation. Retrieval of FB stuck at sigmoid colon was undertaken with repair and diversion colostomy and closed later. From the study it was concluded that the retrieval of FB with proper psychological evaluation along with rehabilitation of the patient in society was a multidisciplinary management. Actual algorithm of management of these cases was beyond the surgical clinics and one-time emergency FB retrievals.
Fast Job Recognition and Sorting Based on Image Processing
Authors: Yujie He
Published: May 2021

With the advancement of artificial intelligence (AI) and the upgrading of intelligent manufacturers, the development of intelligent manufacturing is now propelled by the replacement of inefficient traditional assembly machines and operators with machine vision (MV)-based industrial robots. The classic job recognition and positioning algorithm has multiple shortcomings, such as high complexity, manual design of similarity function, and susceptibility to noise disturbance. To solve these shortcomings, this study presents a fast job recognition and sorting method based on image processing. Firstly, the extraction approach for wavelet moment features and wavelet descriptors was introduced, and the feature fusion based on echo state network (ESN) was detailed. Then, the authors explained the idea of job template matching, and described how to measure similarity and terminate the measurement during template matching. Experimental results fully manifest the effectiveness of our strategy for fast job recognition and sorting. Our method offers a new solution to rapid recognition and sorting of objects in other fields.
Object Recognition in Remote Sensing Images Based on Modified Backpropagation Neural Network
Authors: Raju Manthena Narasimha , Natarajan Kumaran , Vasamsetty Chandra Sekhar
Published: May 2021

In the area of remote sensing, one of the problems is how high-quality remote sensing images are automatically categorized and classified. There have been many suggestions for alternatives. Amongst these, there are drawbacks of approaches focused on low visual and intermediate visual characteristics. This article, therefore, adopts the deep learning method for classifying high-resolution remote sensing picture scenes to learn semantic knowledge. Most of the existing neural network convolution approaches are focused on the model of transfer training and there are comparatively like hidden Marco models, linear fitting methods, the creation of new neural networks based on the latest high-resolution remote sensing picture data sets. But in this paper, we used a modified backpropagation neural network is proposed to detect the objects in images. To test the performance of the proposed model we use two remote sensing data sets benchmark tests were done. The test-precision, precision, reminder, and F1 scores are all fine with the Assist data collection. The precision, precision, reminder, and F1 score are all enhanced on the SIRI-WHU dataset. The proposed system has better precision and robustness compared to the current approaches including the most conventional methods and certain profound learning methods to scene distinguish high-resolution remote sensing pictures.
A Region-Based Efficient Network for Accurate Object Detection
Authors: Guan Yurong , Aamir Muhammad , Hu Zhihua , Abro Waheed Ahmed , Rahman Ziaur , Dayo Zaheer Ahmed , Akram Shakeel
Published: May 2021

Object detection in images is an important task in image processing and computer vision. Many approaches are available for object detection. For example, there are numerous algorithms for object positioning and classification in images. However, the current methods perform poorly and lack experimental verification. Thus, it is a fascinating and challenging issue to position and classify image objects. Drawing on the recent advances in image object detection, this paper develops a region-baed efficient network for accurate object detection in images. To improve the overall detection performance, image object detection was treated as a twofold problem, involving object proposal generation and object classification. First, a framework was designed to generate high-quality, class-independent, accurate proposals. Then, these proposals, together with their input images, were imported to our network to learn convolutional features. To boost detection efficiency, the number of proposals was reduced by a network refinement module, leaving only a few eligible candidate proposals. After that, the refined candidate proposals were loaded into the detection module to classify the objects. The proposed model was tested on the test set of the famous PASCAL Visual Object Classes Challenge 2007 (VOC2007). The results clearly demonstrate that our model achieved robust overall detection efficiency over existing approaches using fewer or more proposals, in terms of recall, mean average best overlap (MABO), and mean average precision (mAP).
An Image Sharpness Enhancement Algorithm Based on Green Function
Authors: Huang Qiuhe
Published: May 2021

The traditional image sharpness enhancement algorithm faces several defects, namely, the lack of details, and the poor subjective effect. To solve these defects, this paper proposes an image sharpness enhancement algorithm based on the Green function. Specifically, the Retinex model was employed to ensure that the enhanced image has outstanding details, and the Poisson’s equation was solved to maintain the consistency between the enhanced image and the original image in the gradient domain. Then, adaptive brightness mapping was carried out to determine the boundary conditions suitable for display, and the boundary of the region was sampled to reduce the complexity of our algorithm. Experimental results show that our algorithm improved the contrast and sharpness of images from the levels of contrastive image enhancement algorithms.
Получение пористого никеля из сплава Ni/Cu методом селективного электрохимического травления
Authors: Артыкбаева М. Т. , Елеуов М. А. , Смагулова Г. Т. , Бейсенов Р. Е.
Published: May 2021

В настоящее время получение пористых каркасных наноструктур из проводящих материалов и полупроводников является важным направлением нанотехнологий. Пористые металлические структуры представляют растущий технологический интерес из-за множества полезных физических свойств, таких как низкая массовая плотность, высокая площадь поверхности и высокая механическая прочность. Пористые материалы также обладают потенциалом улучшения электрических, термических, оптических или реакционных свойств, что приводит к множество возможных применений. Нанопористые материалы обладают уникальными поверхностными, структурными и объемными свойствами, что приводит к применению в различных областях, таких как ионный обмен, разделение, катализ, сенсоры, биологическая молекулярная изоляция и очистка. В работе были отработаны методы получения пористых каркасных структур никеля методом селективного электрохимического травления из сплава Ni/Cu. Для установления влияния соотношения исходных компонентов (никель и медь) на морфологию пористого никеля после электрохимического травления, исследовали сплавы в следующих соотношениях Ni:Cu – 90:10,80:20 и 60:40. Было установлено, что соотношение никеля и меди в составе исходного сплава влияет на структуру и морфологию пористого никеля. Для исследования структуры и морфологии полученных образов пористого никеля были использованы современные методы анализа, такие как сканирующая электронная (растровая) микроскопия и метод низкотемпературной адсорбции азота (метод БЭТ).
Влияние внешних факторов на разлив нефти в море
Authors: Нысанбаева Г. Р. , Тастанбекова А. О. , Кудайбергенов К. К. , Турешова Г. О. , Онгарбаев Е. К.
Published: May 2021

Проведены расширенные пилотные испытания реагентного состава. Получена дополнительная информация о внешних факторах влияния на процесс (погодныеусловия, условия волн, миграция и распространение нефтяного пятна и т д.).Так же рассмотрены возможности распыления/нанесения реагентного составана поверхность разлива нефти с учетом выше перечисленных факторов.
Получение волокнистых композиционных материалов методом электроспиннинга и их применение
Authors: Курбанова З. Н. , Смагулова Г. Т. , Кайдар Б. Б.
Published: May 2021

Получены углерод-полимерные волокна методом электроспиннинга, состоящие из полиметилметакрилата с модифицирующим наполнителем в виде карбонизованной рисовой шелухи. Электроспиннинг ввиду простоты аппаратного исполнения, высокой эффективности и возможности масштабирования, вплоть до промышленных установок, является одним из самых перспективных методов получения волокон с диаметром от нескольких миллиметров до нанометрового порядка. Было исследовано влияние концентрации ПММА на характеристики волокон. Анализ снимков оптической микроскопии показали, что для 1 масс.%-го раствора ПММА: КРШ волокна имеют поперечную ширину от 1.25 до 3.75 мкм, в котором диаметр частиц карбонизованной рисовой шелухи варьируется от 2.5 до 6.25 мкм. Для 3 масс.% -го раствора ПММА:КРШ диаметр волокон лежит в пределах от 3.9 мкм до 8 мкм, а размер частиц лежит в пределах от 6.1 мкм до 14 мкм. Анализ полученных изображений сканирующей электронной микроскопии показал, что для 1 масс.% раствора ПММА диаметр волокон лежит в интервале от 330 нм до 1 мкм, для 3 масс. % раствора ПММА от 3 до 6 мкм, соответственно. Для полученных композиционных материалов были исследованы адсорбционные характеристики по метиленовому голубому, полученные композиты обладают эффективностью поглощения равной 223.7 мг/г для 1 масс.% раствора и 281.5 мг/г для 3 масс. % раствора. Нановолокна способны образовывать высокопористую сетку, а благодаря их относительно большому отношению поверхности к объему нановолокна находят применение в области хранения энергии, здравоохранения, биотехнологии, экологической инженерии, обороны и безопасности.
Nanocomposite material like advanced sorbent materials for carbon dioxide capture
Authors: Zhumagaliyeva А. , Gargiulo V. , Doszhanov Ye. , Alfe M.
Published: May 2021

In this work carbonized rice husk  was used as carbon-based solid matrix in the preparation of composite materials modified with Fe3O4 particles. Aim of this study is to exploit the advantages and shortcomings of using a real biomass as starting material for the preparation of sorbents for CO2 capture applications. Sorption capacity of the obtained composite materials was tested on fixed-bed  microreactor.
Разработка пиротехнических замедлительных составов для обработки нефтяных скважин
Authors: Габдрашова Ш.Е. , Тулепов М.И. , Спанова Г.А. , Elouadi B.
Published: May 2021

В результате проведенных исследований разработаны новые замедлительные составы на основе хромата бария, нитрата аммония и магния, обладающие высокой стабильностью рабочих характеристик. Исследованы закономерности процесса горения замедлительных составов и влияние инертной среды на процесс горения. Показана роль порошка магния, который способствует увеличению скорости горения и повышению энергетику состава. Продукты горения разработанного состава были исследованы с помощью сканирующей электронной микроскопии и рентгенофазового анализа.
Экранирующий материал от СВЧ излучения с добавками наночастиц магне- тита - Fe3O4, полученных методом жидкофазного горения
Authors: Лесбаев А.Б. , Манаков С. , Смагулова Г.Т. , Устаева Г.С.
Published: May 2021

Магнетит (Fe3O4) представляет собой оксид железа, имеющий широкий спектр практических применений. Синтез оксида железа и его применение является актуальным направлением современных исследований. Целью данной работы являлось получение наночастиц магнетита при различных соотношениях исходных компонентов и исследование их физико-химических характеристик, а также применить их в качестве добавок в структуру цементного камня для улучшения экранирующих свойств от СВЧ излучения. Магнитные наночастицы оксида железа были получены методом жидкофазного горения, являющийся простым и эффективным методом синтеза. Были проведены исследования влияния соотношения исходных компонентов - нитрата железа к лимонной кислоте (1: 1, 1: 1,5: 1: 2) на состав и структуру получаемых наночастиц магнетита. Полученные наночастицы магнетита были исследованы XRD-анализом, сканирующей электронной микроскопией, оптическим микроскопом и измерена удельная поверхность методом БЭТ. Средние размеры кристаллитов оксида железа были рассчитаны по формуле Шеррера и составляли - 20 нм для отношения 1:1, 18 нм для 1:1,5 и 13 нм для 1:2, соответственно. Исследования методом сканирующей электронной микроскопии показали, что изменение соотношения нитрата железа к лимонной кислоте от 1:1 до 1:2 приводит к значительным изменениям в структуре и морфологии наночастиц магнетита, дисперсность продукта увеличивается с увеличением содержания лимонной кислоты. Установлено, что добавки наночастиц магнетита, синтезированные методом Solution combustion, оказывает влияние на экранирующие свойства цементного камня. Наилучший результат ослабления в 18,3 дБ показал образец с содержанием 0,5 % наночастиц магнетита при частоте 12,5 ГГц. При концентрации 1 % наночастиц магнетита ослабление СВЧ излучения можно добиться при частоте 13 ГГц в 16,3 дБ.