bluuebunny/crossref_metadata_2025 huggingface dataset:
From Blended to Fully Virtual
Authors: Jasonides Kathleen M. , Zavacopoulou Amalia
Published: March 2021

The purpose of this chapter is to document the transformation of a blended, high school Humanities course to a virtual course that maintains a strong academic focus and preserves the core values of a human-centered education. The authors share the process of redesigning the course content, learning activities, and assessment, using specific examples from their experience and their research. The authors evaluate their experience by presenting the challenges and benefits of this undertaking. Ultimately, the goal of the authors is to assure that the Humanities Program at the American Community Schools Athens will continue to adapt to the digital world, making wise use of educational technology to provide our students with a broad, humanistic, liberal arts education that will serve them well in any field of endeavor.
The i2Flex Transformation of a Commemorative Event to a Service-Learning Experience
Authors: Bakoyannis Christina , Koniossis Sevasti
Published: March 2021

The American Community Schools (ACS) Athens Middle School was able to transform a one-day commemorative event known as United Nations Day into long-term service-learning using i2Flex principles and methodologies. The i2Flex blended learning component enabled teachers and students to overcome time limitations and empowered students to take ownership of their service. Utilizing i2Flex strategies can prove meaningful for long term student character development, innovation, and critical thinking skills required in the 21st century. The United Nations Sustainable Development Goals (UN SDGs or Global Goals) guided the development of the Moodle course shell and a lasting service-learning experience for middle school students. The authors also discuss how the transformation of United Nations Day into authentic service-learning shaped an advisory program in the middle school and what implications it can further have in a school setting.
Thermal Based Process Monitoring for Laser Powder Bed Fusion (LPBF)
Authors: Tyralla Dieter , Seefeld Thomas
Published: March 2021

Laser powder bed fusion (LPBF) is a frequently used manufacturing process due to its advantages in lightweight construction, design possibilities and functionalization of geometry. However, the printed parts will often have to undergo time and cost expensive non-destructive testing by sophisticated methods like X-CT. Thus, there is a strong demand to identify suitable online process monitoring techniques that allow to reduce or substitute post-process NDT effort. The temperature field reacts sensitively to deviations during processing, thus online temperature monitoring is a promising approach. In the present work a spatially resolved temperature measurement, based on 2-channel-pyrometry, is used for process monitoring in LPBF. The camera system is coaxially integrated into the beam guidance of the LPBF system. The coaxial observation enables a lateral resolution better than 10 μm over the whole build-up area of 250 x 250 mm2. Single tracks were welded with different parameters and observed by the camera system to identify thermal indicators. Metallographic cross-sections of the tracks were compared with the melt pool width measured by the online observation system. The deviation was ca. 3 %. In addition, cubes of 10 mm by 10 mm by 10 mm are built up. The melt pool area is identified as useful indicator for the process behavior and for the first time the assessment of part density is demonstrated in LPBF during process by the help of a thermal monitoring system.
Synthesis of Kapok (Ceiba pentandra) Carbon Sponges for Recovery of Oil and Organic Solvents
Authors: Datiles Wayne Christian P. , Sy Sellina M. , Balela Mary Donnabelle L.
Published: March 2021

Extensive processes and costly precursors for the fabrication of existing sorbents for oil spills urges to look for more renewable sorbent sources. In this work, hollow, tubular, cellulosic fibers (kapok, Ceibapentandra) were successfully converted to carbon sponges by pyrolysis at increasing temperature and time. Fourier Transform Infrared (FTIR) spectroscopy confirmed the complete carbonization of the kapok fibers at 800 °C. Scanning Electron Microscope (SEM) images revealed that the carbonized kapok fibers maintained their original tubular structures, suggesting high surface area. Water contact angle measurement showed improved hydrophobicity, with a maximum value of about 135°. The carbonized fibers were able to hold selected organic and oil solvents ranging from 16-20 times the weight of the fibers. The fiber pyrolyzed at 400 °C for 0.5 h showed the highest sorption capacity at 45.56 g/g for palm oil, almost matching that of raw kapok.
A Study on the Deformation due to High Speed Processing of Aircraft Wing Structure
Authors: An Jihye , Kim Hyunji , Kim Dohyeon , Nam Sangkyoo , Yoo Yunyoong , Huh Sunchul
Published: March 2021

Residual stresses generated during high-speed machining of spoiler beams used in aircraft cause product deformation and dimensional mismatch, which increases the defect rate and leads to material waste. To overcome this problem, the processing site uses manual modification techniques that stretch part of the workpiece according to the experience of skilled workers. However, due to the nature of the aviation parts industry, there are no established methods for modification of product shapes and parts. Studying the modification process would allow for increased productivity, such as shorter working hours, throughout the aviation industry. In this study, a method of predicting residual stress due to frictional heat generated during high-speed machining and applying a tensile force to a model deformed by residual stress was used to modify the product. Our analysis showed that a degree of deformation similar to the measured value was produced, and that the product was modified by applying a tensile load.
Effect of NABr on the Pore Size and Surface Morphology of Cu Foam Prepared by Hydrogen Bubble Templating
Authors: Balela Mary Donnabelle L. , Masirag Reginald E. , Pacariem Jr. Francis O. , Taguinod Juicel Marie D.
Published: March 2021

Binderless supercapacitor electrodes are currently being employed to increase the surface contact between the active material and current collector, leading to enhanced capacitance. In binderless electrodes, the active material is directly grown on the surface of the current collector, omitting the use of insulative polymer-based binders. In this work, Cu foam was successfully electrodeposited on Cu sheet by dynamic hydrogen bubble templating (DHBT) using polyethylene glycol (PEG) and sodium bromide (NaBr) as additives. The current density was set at 3 A·cm-2 and electrodeposition was performed for 20 s. At 200 mg/L PEG, increasing the NaBr concentration from 0 to 80 mM produced Cu foam with decreasing pores sizes of about 75.15 to 34.10 μm. However, the walls of the interconnected pores became thicker as the pore diameters were reduced. This indicates that NaBr promotes Cu deposition rather than hydrogen evolution reaction (HER), leading to smaller pore sizes. X-ray diffraction confirms the oxidation of the Cu foam under ambient conditions forming cuprous oxide (Cu2O). The Cu2O/Cu foam was then utilized as binderless electrode for supercapacitor, resulting to a specific capacitance of 0.815 F·cm-2 at 5 mV·s-1. Results show the potential of the fabricated Cu2O/Cu foam as binderless electrode for pseudo-type supercapacitors.
Effect of beetroot (Beta vulgaris) extract on Black Angus burgers shelf life
Authors: Marrone Raffaele , Smaldone Giorgio , Ambrosio Rosa Luisa , Festa Rossella , Ceruso Marina , Chianese Antonio , Anastasio Aniello
Published: March 2021

Beef burgers are meat preparations with easy perishability. To ensure a longer shelflife, the Regulation EU 1129/11 allows the use of some additives. However, healthconscious consumers prefer products which do not contain synthetic substances. Aim of the present study was to evaluate the effect of Red Beetroot (Beta vulgaris) integration on Black Angus made burgers shelf life. Red beet was prepared as powder and added to meat mixture as the same or in water solution. The study was split into 2 trials to assess the extract activity also in burgers vacuum-packaged stored. Burgers were analysed (up to 9 days at 4°C) in terms of sensory properties, microbiological profile, pH, aw and lipid oxidation (TBARS). At the end of storage, treated samples showed the highest values of redness and the lowest content of malondialdehyde, probably due to antioxidant properties of red beet towards myoglobin and lipid oxidation processes. Moreover, results highlighted that Red Beetroot activities were dose-dependent and intensified if dissolved in water. The aw values did not appear to be conditioned by extract integrations, unlike the pH that was lower in treated samples than control ones. Microbiological analyses identified beetroot as a potential antimicrobial substance, especially in high concentration. In conclusion, Beta vulgaris extract could be proposed as natural compound exploitable in beef burgers to preserve qualities and extend their shelf-life.
Algal blooms of Alexandrium spp. and Paralytic Shellfish Poisoning toxicity events in mussels farmed in Sicily
Authors: Costa Antonella , Alio Vincenzina , Sciortino Sonia , Nicastro Luisa , Cangini Monica , Pino Fiorella , Servadei Irene , La Vignera Angelo , Fortino Gianluca , Monaco Salvatore , Dall'Ara Sonia
Published: March 2021

Marine biotoxins can accumulate in filter-feeders bivalve molluscs, that may represent a source of potential health problems being vectors of toxins, that are transferred to humans through their consumption. Harmful Algal Blooms impact on aquaculture may give also economic losses due to temporary closures of contaminated shellfish harvest and marketing. The presence of toxic algae for Paralytic Shellfish Poisoning (PSP), with recurrent toxic blooms of dinoflagellates, such as several Alexandrium species, been known since 2000 in the waters of an Ionian bay of Sicily, the Syracuse harbour, where shellfish farms are located. Our previous works reported in this area the positivity for PSP toxin in mussels (Mytilus galloprovincialis) with saxitoxin concentrations above the limit of the law and the simultaneous presence of toxic species of the genus Alexandrium in the waters. This work reports new recent episodes of algal blooms of Alexandrium minutum in the waters of the Syracuse harbour and PSP toxin contamination in farmed mussels, with values beyond the limits established by law, with the consequent immediate closure of the production area. PSP toxicity was detected with the MBA (Mouse Bioassay) with the confirm carried out with Lawrence method to quantify the total saxitoxin equivalents and characterize the toxic profile. Regular application of the implemented health plan is very important in order to prevent any risk and protect consumer health.
Chemical Risk in Hospital Settings: Overview on Monitoring Strategies and International Regulatory Aspects
Authors: Charlier Bruno , Coglianese Albino , De Rosa Federica , De Caro Francesco , Piazza Ornella , Motta Oriana , Borrelli Anna , Capunzo Mario , Filippelli Amelia , Izzo Viviana
Published: March 2021

Chemical risk in hospital settings is a growing concern that health professionals and supervisory authorities must deal with daily. Exposure to chemical risk is quite different depending on the hospital department involved and might origin from multiple sources, such as the use of sterilizing agents, disinfectants, detergents, solvents, heavy metals, dangerous drugs, and anesthetic gases. Improving prevention procedures and constantly monitoring the presence and level of potentially toxic substances, both in workers (biological monitoring) and in working environments (environmental monitoring), might significantly reduce the risk of exposure and contaminations. The purpose of this article is to present an overview on this subject, which includes the current international regulations, the chemical pollutants to which medical and paramedical personnel are mainly exposed, and the strategies developed to improve safety conditions for all healthcare workers.
Table of Contents Vol 54, No 1 & 2 (2020)
Authors: Office Editorial
Published: March 2021

No Abstact available.
Point of Care Ultrasound in Coronavirus Disease 2019 Pandemic
Authors: Yadav Sangam , Singh Abhishek , Manisha Kalung , Khanna Puneet
Published: March 2021

After the detection of novel coronavirus (2019) as the cause of a cluster of pneumonia in Wuhan, China, at the end of 2019, more than 10 million confirmed cases of coronavirus disease 2019 (COVID-19) have been reported around the globe. In the COVID-19 intensive care unit (ICU), the use of stethoscope is minimal for obvious reasons. Shifting of COVID-19 patients out of ICU setup increases the risk of transmission of infection to health-care workers as well as jeopardizes the safety of patients. Hence, diagnostic imaging has emerged as a fundamental component of the current management of COVID-19. Lung ultrasound (LUS) imaging has become a safe bedside imaging alternative that does not expose the patient to radiation and minimizes the risk of contamination. Ultrasound (USG) can be used to scan almost all vital organs (heart, kidney, vascular, brain, etc.) and also help in rapid decision-making regarding the management of COVID-19 patients. In this note, we review the current state of the art of LUS in evaluating pulmonary changes induced by COVID-19. The goal is to identify characteristic sonographic findings most suited for the diagnosis of COVID-19 pneumonia infections as well as to assess the impact of infection on other organs and utilizing the same in the management of COVID patients without compromising on the safety of patient or health-care provider.
The Effects of Ozone Oxidative Preconditioning on Subarachnoid Hemorrhage via Rat Cerebral Vasospasm Model
Authors: Süslü Hikmet Turan , Tatarlı Necati , Ceylan Davut , Süslü Hüsnü , Bozkurt Süheyla Uyar , Avsar Timucin , Güçlü Bülent
Published: March 2021

Objective:

Cerebral vasospasm after subarachnoid hemorrhage (SAH) is a major cause of morbidity and mortality. Inflammation is the major molecular mechanism observed in vasospastic SAH. Ozone (O3) has been used as a therapeutic agent in the treatment of various conditions and diseases for years. The aim of this study was to evaluate the anti-inflammatory effect of ozone oxidative preconditioning (OOP) in a rat model of SAH in order to assess the therapeutic potential of O3 in SAH therapy.

Materials and Methods:

In the presented study, an experimental in vivo SAH rat model that provided constriction of large cerebral arteries was used. The inflammatory response of cerebral vasospasm after SAH and the effects of OOP were evaluated by comparing the mRNA levels of inflammatory molecules (tumor necrosis factor-α, interleukin-1β, and intercellular adhesion molecule-1) in the serum samples of rats.

Results:

The level of inflammatory molecules increased in vasospasm at 12 h, 24 h, and 48 h in the posttreatment groups. However, intraperitoneal OOP decreased the level of inflammatory molecules dramatically.

Conclusions:

Our study indicated that O3 treatment has potential in the management of inflammation created in a rat SAH model. These findings may inform further studies investigating possible uses of O3 in the treatment of vasospasm.
Kawasaki disease in Port Harcourt, Nigeria
Authors: Wonodi Woroma , Okari Tamunoiyowuna Grace
Published: March 2021

Kawasaki disease (KD) is an acute febrile vasculitis of childhood, predominantly affecting medium-sized arteries with a predilection for coronary arteries and commonly occurring in children under the age of 5 years. Early recognition can be challenging; however, delayed diagnosis increases the risk of coronary artery abnormalities and death. We report a case of KD in a 19-month-old child who presented with prolonged fever, conjunctival congestion, skin rash and redness of lips and tongue. He was initially managed as a case of complicated measles, but with worsening symptoms, KD was suspected. Echocardiography revealed a left coronary artery aneurysm. He received two doses of intravenous immunoglobulin G, over a period of 24 h and responded remarkably to treatment. KD is rare in Port Harcourt, Nigeria, and children with prolonged fever and erythematous rash may be mistakenly managed for measles if there is no high level of suspicion amongst clinicians.
Severe obesity associated with hyperglycemia and abdominal fats in metabolic syndrome patients
Authors: Musa Khansa Ibrahim , Ibrahim Mariam Abbas , Al Masri Mai Abderahman , Ismail Amar Mohamed
Published: March 2021

Background:

Obesity is a major public problem in developed and developing countries associated with a high mortality rate. Herein, we determined the relationships between severe obesity, lipid profile, blood glucose in metabolic syndrome (MS) patients.

Materials and Methods:

In a cross-sectional 215 MS patients, ages ranged from 37 to 84 were randomly selected. Body mass index and waist circumference (WC) were estimated. Fasting serum lipid profile and plasma blood glucose were measured.

Results:

In total, 132 (61.4%) were female, 151 (70.2%) were obese, 64 (29.8%) were sever obese, and 143 (66.5%) had WC ≥ 110. Chi-square analyses show that severe obesity was significantly associated with increased WC and hyperglycemia with (odds ratio [OR] = 2.230 and 2.400) and (P = 0.019 and 0.005), respectively. The severe obesity in females was two-fold increased than males (OR = 1.93, P = 0.028).

Conclusion:

Severe obesity associated with central obesity and hyperglycemia in MS patients. Moreover, females at higher risk to have severe obesity.
Lipomatous hemangiopericytoma of the larynx
Authors: Singh Kanika , Pujani Mukta , Jain Avani , Khandelwal Aparna
Published: March 2021

Hemangiopericytoma (HPC) arising from the contractile pericyte of Zimmerman comprises less than 1% of the vascular tumors with approximately 200 cases documented in the literature, out of which only 11 cases are reported in the larynx. Lipomatous hemangiopericytoma (LHPC) is an uncommon histological variant composed of a mixture of HPC and mature lipomatous component with around 50 cases reported so far, and majority have been found in the deep soft tissue of the lower extremities and retroperitoneum. HPCs are closely related to solitary fibrous tumors, and the LHPC was designated as a separate entity according to recent the World Health Organization classification of soft tissue tumors in 2002. To the best of our knowledge, even on extensive search of literature, LHPC of the larynx has not been reported till date. We report an extremely rare case of LHPC in a middle-aged female presented with a mass in the arytenoid cartilage of the larynx.
Acylindrical hyperbolicity of groups acting on quasi-median graphs and equations in graph products
Authors: Valiunas Motiejus
Published: March 2021

In this paper we study group actions on quasi-median graphs, or "CAT(0) prism complexes", generalising the notion of CAT(0) cube complexes. We consider hyperplanes in a quasi-median graph

X

and define the
contact graph

\mathcal{C}X

for these hyperplanes. We show that

\mathcal{C}X

is always quasi-isometric to a tree, generalising a result of Hagen [18], and that under certain conditions a group action

G \curvearrowright X

induces an
acylindrical
action

G \curvearrowright \mathcal{C}X

, giving a quasi-median analogue of a result of Behrstock, Hagen and Sisto [5].

As an application, we exhibit an acylindrical action of a graph product on a quasi-tree, generalising results of Kim and Koberda for right-angled Artin groups [20, 21]. We show that for many graph products

G

, the action we exhibit is the "largest" acylindrical action of

G

on a hyperbolic metric space. We use this to show that the graph products of equationally noetherian groups over finite graphs of girth

\geq 6

are equationally noetherian, generalising a result of Sela [27].
Measure equivalence and coarse equivalence for unimodular locally compact groups
Authors: Koivisto Juhani , Kyed David , Raum Sven
Published: March 2021

This article is concerned with measure equivalence and uniform measure equivalence of locally compact, second countable groups. We show that two unimodular, locally compact, second countable groups are measure equivalent if and only if they admit free, ergodic, probability measure preserving actions whose cross section equivalence relations are stably orbit equivalent. Using this we prove that in the presence of amenability any two such groups are measure equivalent and that both amenability and property (T) are preserved under measure equivalence, extending results of Connes–Feldman–Weiss and Furman. Furthermore, we introduce a notion of uniform measure equivalence for unimodular, locally compact, second countable groups, and prove that under the additional assumption of amenability this notion coincides with coarse equivalence, generalizing results of Shalom and Sauer. Throughout the article we rigorously treat measure theoretic issues arising in the setting of non-discrete groups.
K- and L-theory of graph products of groups
Authors: Kasprowski Daniel , Li Kevin , Lück Wolfgang
Published: March 2021

We compute the group homology, the algebraic

K

- and

L

-groups, and the topological

K

-groups of right-angled Artin groups, right-angled Coxeter groups, and more generally, graph products.
CAT(0) cube complexes are determined by their boundary cross ratio
Authors: Beyrer Jonas , Fioravanti Elia , Incerti-Medici Merlin
Published: March 2021

We introduce a

\mathbb{Z}

-valued cross ratio on Roller boundaries of CAT(0) cube complexes. We motivate its relevance by showing that every cross-ratio preserving bijection of Roller boundaries uniquely extends to a cubical isomorphism. Our results are strikingly general and even apply to infinite dimensional, locally infinite cube complexes with trivial automorphism group.
A set of positive Gaussian measure with uniformly zero density everywhere.
Authors: Preiss David , Riss Elena , Tišer Jaroslav
Published: March 2021

Existing negative results on invalidity of analogues of classical Density and Differentiation Theorems in infinite-dimensional spaces are considerably strengthened by a construction of a Gaussian measure

\gamma

in a separable Hilbert space

H

for which the Density Theorem fails uniformly, i.e. there is a set

M\subset H

of positive

\gamma

-measure such that

\lim_{r\searrow 0}\sup_{x\in X} \frac{\gamma(B(x,r)\cap M)}{\gamma B(x,r)}=0.
О равностепенной непрерывности семейств отображений с одним условием нормировки
Authors: Sevost'yanov Evgenii Aleksandrovich , Sergei Skvortsov
Published: March 2021

Изучено поведение одного класса отображений области
евклидова пространства. Установлено, что указанный класс
равностепенно непрерывен как во внутренних,
так и в граничных точках области, если входящие в него отображения
удовлетворяют общему условию нормировки,
а соответствующая характеристика квазиконформности
лишь умеренно растет в окрестности каждой из точек ее замыкания.
Библиография: 13 названий.
К $\sigma$-проблеме Кегеля-Виландта
Authors: Каморников Сергей Федорович , Kamornikov Sergey Fedorovich , Тютянов Валентин Николаевич , Tyutyanov Valentin Nikolaevich
Published: March 2021

Для произвольного разбиения $\sigma$ множества $\mathbb{P}$
всех простых чисел приводится достаточный признак
$\sigma$-субнормальности подгруппы в конечной группе. Доказывается,
что если полное холлово множество типа $\sigma$ редуцируется
в подгруппу $H$ $\sigma$-полной конечной группы $G$,
все неабелевы композиционные факторы которой являются
либо знакопеременными группами, либо группами Судзуки,
либо группами Ри, то $H$ является $\sigma$-субнормальной в $G$.
Библиография: 15 названий.
О существовании и устойчивости бесконечномерного инвариантного тора
Authors: Glyzin Sergey Dmitrievich , Kolesov Andrei Yurevich , Rozov Nikolai Khristovich
Published: March 2021

Рассматривается кольцевое множество вида
$K=B\times\mathbb{T}^{\infty}$, где $B$ - замкнутый шар
банахова пространства $E$, $\mathbb{T}^{\infty}$ -
бесконечномерный тор (прямое произведение счетного числа
окружностей с топологией равномерной покоординатной сходимости).
Для некоторого класса гладких отображений $\Pi\colon K\to K$
устанавливаются достаточные условия существования и
устойчивости инвариантного тороидального многообразия вида
$$
A=\{(v,\varphi)\in K: v=h(\varphi)\in E,
\varphi\in\mathbb{T}^{\infty}\},
$$
где $h(\varphi)$ -
некоторая непрерывная функция аргумента
$\varphi\in\mathbb{T}^{\infty}$. Исследуется также вопрос
о $C^m$-гладкости этого многообразия при любом натуральном $m$.
Библиография: 4 названия.
Управляемые полумарковские процессы в условиях ограничений
на стратегии управления и построение оптимальных стратегий
в моделях надежности и безопасности
Authors: Kashtanov Viktor Alekseevich , Zaiceva Olga Borisovna , Efremov A A
Published: March 2021

В работе исследуется структура распределения, на котором достигается
экстремум дробно-линейного функционала при наличии несчетного числа
линейных ограничений. Приведены примеры использования этих
математических результатов при анализе управляемых моделей
надежности и безопасности.
Библиография: 12 названий.
Оценки производных в пространствах Соболева в терминах
гипергеометрических функций
Authors: Garmanova Tat'yana Alekseevna
Published: March 2021

В статье изучаются точные оценки производных промежуточного порядка
$k\le n-1$ в пространстве Соболева $\mathring W^n_2[0;1]$, $n\in\mathbb N$.
Рассматриваются функции $A_{n,k}(x)$, являющиеся наименьшими возможными
величинами в неравенствах вида
$$
|y^{(k)}(x)|\le A_{n,k}(x)\|y^{(n)}\|_{L_2[0;1]}.
$$
На основе свойств первообразных сдвинутых полиномов Лежандра на
отрезке $[0;1]$ получено явное описание этих функций в терминах
гипергеометрических функций. Также в работе доказано новое соотношение,
связывающее производные и первообразные полиномов Лежандра.
Библиография: 6 названий.
Логическая сложность свойства наличия индуцированного подграфа, изоморфного данному, для некоторых семейств графов
Authors: Zhukovskii Maksim Evgen'evich , Kudryavtsev Eremei Denisovich , Makarov Mikhail Vladimirovich , Shlychkova Aleksandra Sergeevna
Published: March 2021

В настоящей работе изучается задача наиболее эффективной записи на языке первого порядка свойства наличия индуцированного подграфа, изоморфного заданному pattern-графу, тесно связанная с оцениванием временно́й сложности проверки такого свойства. Мы получили ряд новых оценок наименьшей кванторной глубины формулы, определяющей упомянутое свойство для pattern-графов на пяти вершинах, а также для дизъюнктных объединений изоморфных полных многодольных графов. Кроме того, мы доказали, что для любого $\ell\geqslant 4$ найдется граф на $\ell$ вершинах и формула первого порядка кванторной глубины не более $\ell-1$, записывающая свойство содержать индуцированный подграф, изоморфный этому графу.
Библиография: 12 названий.
Бирациональная геометрия двойных пространств Фано индекса 2 с особенностями
Authors: Pukhlikov Aleksandr Valentinovich
Published: March 2021

В работе дано описание бирациональной геометрии двойных пространств Фано $V\stackrel{\sigma}{\to}{\mathbb P}^{M+1}$ индекса 2 размерности $\geqslant 8$, имеющих не более чем квадратичные особенности ранга $\geqslant 8$ и удовлетворяющих некоторым дополнительным условиям общности положения: доказано, что эти многообразия не имеют структур рационально связного расслоения над базой размерности $\geqslant 2$, что любое бирациональное отображение $\chi\colon V\dashrightarrow V'$ на тотальное пространство расслоения Мори $V'/{\mathbb P}^1$ индуцирует изоморфизм $V^+\cong V'$ раздутия $V^+$ многообразия $V$ вдоль $\sigma^{-1}(P)$, где $P\subset {\mathbb P}^{M+1}$ есть некоторое линейное подпространство коразмерности 2, и что любое бирациональное отображение многообразия $V$ на многообразие Фано $V'$ с ${\mathbb Q}$-факториальными терминальными особенностями и числом Пикара 1 есть изоморфизм. Дана явная нижняя оценка коразмерности множества многообразий $V$, имеющих худшие особенности или не удовлетворяющих условиям общности положения, квадратичная по $M$. Доказательство использует метод максимальных особенностей и усиленное $4n^2$-неравенство для самопересечения подвижной линейной системы.
Библиография: 20 названий.
Гомологические размерности банаховых пространств
Authors: Cabello Sanchez Félix , Castillo Jesus María Fernandez , García Ricardo
Published: March 2021

Цель этой статьи - заложить основы исследования вопроса, когда $\operatorname{Ext}^n(X,Y)=0$ для банаховых пространств. Мы приводим несколько примеров пар $X$, $Y$, для которых $\operatorname{Ext}^n(X,Y)$ равно (или не равно) $0$. Мы покажем, что $\operatorname{Ext}^n(\mathscr K,\mathscr K)\neq0$ для всех $n\in\mathbb{N}$, если $\mathscr K$ - пространство Кадеца. В частности, как проективная, так и инъективная размерности $\mathscr K$ бесконечны.
Библиография: 48 названий.
A STUDY ON IMPACT OF BEHAVIOURAL FINANCE ON INVESTMENT DECISION OF SINGLE PARENTS IN SOUTH ASIAN COUNTRIES
Authors: Sendilvelu Kannadas , Shah Manita Deepak
Published: March 2021

The purpose of this study is to find out the possible impact of behavioural finance on the investment decision of a single parent. As being an earning/working single parent who usually does not have other possible sources in their family, the decision which they take must be a reliable one and cannot afford to get a second chance. In the study, this study is also one of an effort to assess the impact of behavioural biases in the investment decision-making of a single parent. A questionnaire is designed and responses are collected from 203 respondents who prefer to invest where the level of risk is either low or moderate and are more concerned about losses in their investment than substantial gain. Also, most of the respondents were investing in order to meet some specific purpose, for their retirement plan as well as to educate their children. This study concludes by stating that investors’ risk-taking capacity is dependent on their level of income and the sources of income. Although every Individual is subject to some biases, they tend to think more rational way than an average investor in many ways as they know about their requirements and the investment they make.

JEL Classification Codes: G40, G41.
Transparencia y Gobernanza en la Gestión de la Crisis de COVID-19
Authors: Finol Romero Lorayne
Published: March 2021

The state of emergency at COVID-19 tests the capabilities of the world's governments, in contexts of increasing political conflict, where social needs and aspirations for justice and equity grow exponentially, all which impact on the structuring of a post-coronavirus order with uncertain characteristics. In this sense, through a documentary methodology and the analysis of official government management data, the objective of the article is to describe the meaning of transparency and governance policies implemented within the framework of the health crisis of the pandemic of the new coronavirus, from the perspective of the open government with special emphasis on the cases of Chile and Colombia. The main findings of the research emphasize that open data policy is a necessary condition for qualitatively increasing the levels of governance and transparency of public management in crisis management, all of which makes it possible to conclude that the open government model makes public information available to the citizen that positions him as a watchdog for government activities but, at the same time, the data, being timely and comprehensive, promote the creation of initiatives for collective benefit.
Legal protection of vulnerable groups of population: practice of the European Court of Human Rights
Authors: Matvieieva Liliia , Baltadzhy Polina , Shmalenko Iuliia , Yeftieni Natalia , Ivanchenko Olga
Published: March 2021

The relevance of the problem under study is due to the need to monitoring the general situation to respect to human rights. The establishment, provision and realization of human rights is an important indicator in a state, which indicates its democracy, sociality, as well as the fact that such a state is legal. Purpose of the article in the study the issues of legal protection of vulnerable categories of population in the context of formation of active human rights policy of state aimed at increasing the capacity of socially vulnerable groups and reducing the risks of growing social tensions in society. The leading method for studying this problem is the legal sociological method, which allows us to study the effectiveness of state and legal regulation of human rights protection. The article presents an analysis of the results of the European experience in combating intolerance and discrimination. Its types main determined have been. Highlighted the criteria by which discrimination is prohibited. The legal system of human rights protection mechanisms is analyzed. The article presents scientific categories: discrimination, hate crimes, vulnerable groups. The practical significance lies in the development of proposals for improving domestic legislation.
Objective conditions for improving the protection of the rights of labour migrants in Ukraine
Authors: Kozin Serhii , Kovach Denys , Soroka Larysa , Lopatynska Iryna , Savytskyi Roman
Published: March 2021

The research analyses objective preconditions for improving the protection of the rights of migrant workers in Ukraine. The research methodology included the dialectical combination of tools such as documentary observation and legal hermeneutics. Among the main results is that: sand analyzed the statistical materials and standards of current Ukrainian legislation governing the rights of migrant workers. Problems related to the implementation of the rights of migrant workers in Ukraine were determined. Objective prerequisites for improving the protection of the rights of migrant workers in Ukraine were identified. It was noted that the implementation of rights by migrant workers in the country depends on several conditions and, above all, it was the specificity of the legal regulation of this issue. It is concluded that Ukrainian law provides general guarantees to prevent discrimination against immigrants in terms of exercising their right to work. At the same time, the application of the rights of immigrants in our country depends on several objective and subjective conditions that should be discussed.
Attorneys of the Volga region and the Urals at the beginning of the judicial reform of 1864
Authors: Alterovich Litvin Alexander , Vitalievna Cherkashina Vera
Published: March 2021

The process of training and development of the Bar Institute at the beginning of the judicial reform of 1864 (Reshetnikova, 2014), dates to the government of Alexander II, on the example of the Volga region and the Urals, discusses the main directions and characteristics of the professional activity of lawyers in the region. It is a documentary and historical study that pays special attention to the formation of the Institute of Defense for a deeper understanding of its essence and its inherent characteristics. Currently, there is an objective need for a comprehensive and comprehensive study of the history of the training and development of the Bar Institute. The judicial system was divided into provincial and county. For the provincial system were the Criminal Cases Chamber of the civil court, provincial court, high provincial court, provincial magistrate, superior punishment; and for county - County Court, lower district court. The results can be concluded that the judicial system of the Russian Empire after the successful reform established a powerful and independent Defense Institute. The judicial reform of 1864 created a completely new professional group, which was very important for the legal future of the Russian Empire.
Heuristic Potential of Sammy Smooha Ethnic Democracy Concept
Authors: Dubrovin Vladimir , Solovarova Yulia , Zaripova Aigul , Zakirov Aidar
Published: March 2021

The article next to the hermeneutic methodology examines the key aspects of a special model of political regime: the "ethnic democracy" of S. Smooha, which is based on the idea of the development of an ethnic nation in a state. According to this author's point of view, the main idea of this form of stability is the absolute control of the ethnic majority over the minority. It examines the reasons for the emergence of "ethnic democracy", the characteristics of its implementation in practice and the conditions of stability. When this model is implemented in practice, the State pursues the objective of central ethnic-national development in the country, as well as its isolation from other ethnic groups. Under the concept of "ethnic democracy" the ethnic minority is granted limited rights, the state constantly monitors its scope, considering the interests of the "main" nation. It is concluded that the implementation of the "ethnic democracy" model deliberately violates the right to self-identification of a part of the population (ethnic minority), therefore "ethnic democracy" is an element of state policy that addresses inequality or a desire for total assimilation.
The Dynamic of Developing of the Relations between Russia and Great Britain during the President Vladimir Putin’s Third Term (2012-2018)
Authors: Sakaev Vasil Timerjanovich , Demianko Oksana Sergeyevna , Faizullina Rushana Alfredovna
Published: March 2021

The article looks into the features of Russo-British relations in the period from 2012 to 2018 during the third presidential term of Vladimir Putin. During this period, they went through several stages in their development from a period of alienation to almost direct confrontation. The authors reviewed the key events in the period under study in bilateral relations. The factors that played a leading role in the formation of relations at the present stage are also highlighted. The analysis of the position of the two States on various events, including Brexit, was conducted. The research is based on historical-descriptive and intuitive-logical methods. The analysis of the position of the two States on various events was conducted. The results obtained correspond to the conclusions of a number of researchers and expand the existing understanding of the nature of Russia’s bilateral relations with leading Western Powers in the second decade of the XXI century.
The Subsidiarity Principle and Legal and Economic Aspects of The Decentralization in Ukraine
Authors: Kvitka Sergiy , Borodin Yevgeniy , Yemelyanov Volodymyr , Moskalets Mykhailo , Zubchenko Viktoriia
Published: March 2021

The research highlights the peculiarities of the decentralization of power in Ukraine in the political and legal implementation aspect of the principle of subsidiarity. The objective of the study was to determine compliance with the political and legal aspects of the decentralization process in Ukraine based on global standards of the use of the principle of subsidiarity, during the implementation of decentralization reform. The research methodology is because the principle of subsidiarity is the main feature of the interaction of all levels of power. This premise is recognized in the European Charter of Local Self-Government and therefore means an urgent task in modern Ukraine. Financial decentralization, district consolidation, the creation of different but united territorial communities, changes in the administrative-territorial structure, ensuring the capacities of communities, the provision of public services in accordance with national standards must be based on the principle of subsidiarity. The information gathered makes it possible to conclude that the principle of subsidiarity is a barrier to the overly profound centralization of the state body and the separation of power.
Assessment of Business Infrastructure in 2018
Authors: Pinkovetskaia Iuliia S. , Lebedev Anton V. , Rozhkov Mikhail A. , Berezina Natalia V.
Published: March 2021

The aim of the research is to assess development of entrepreneurship infrastructure of various countries according to opinions of experts from these countries. The elements were: knowledge and technology transfer infrastructure; commercial and professional infrastructure; production and information infrastructure; market infrastructure; institutions providing easy access to existing markets; social and cultural infrastructure. The research is based on methods of economic analysis, analogies, generalizations, classification, system, and structural approaches. Information from the Global entrepreneurship monitoring project report for 54 countries was used as input data. The estimation of the distribution of indicator values on the effectiveness of the six main infrastructure elements of business development reflecting the opinions of experts from these countries with the use of mathematic models of normal distribution. During the study we determined the average indicator values characterizing experts ' opinions on the effectiveness of each of the six key infrastructure elements of business development on a scale of ten; the intervals of their changes characteristic for the majority of countries were also considered. New knowledge about the effectiveness of infrastructure elements of business development in various countries has been obtained.
Criminal Aspects of Robotics Applications
Authors: Sundurov Fedor Romanovich , Begishev Ildar Rustamovich , Khisamova Zarina Ilduzovna , Bikeev Igor Izmailovich , Latypova Elvira Yuryevna , Ishbuldin Timur Radikovich
Published: March 2021

Direct and indirect criminological risks of the use of robotics are analyzed and issues of responsibility of the manufacturer (developer)and/or owner (user) of robotics are discussed for acts committed with their participation. This essay discusses promising areas of legal research related to robotics and its corresponding legal regulations. The definition of robotics is based and proposed as all categories of robots in their broadest sense, regardless of their purpose, degree of danger, mobility, or autonomy, as well as cyber-physical systems with artificial intelligence in any form. It is proposed to recognize socially dangerous acts committed with the use of robotics as crimes committed in a generally dangerous way if there are grounds for doing so. It is concluded that the commission of acts through robotics is capable, in certain cases, of creating a plurality of crimes in the form of a real aggregate. The expanding powers of State security bodies, which can carry out the functions of state policy development, legal regulation, control, and supervision in the field of robotics application, have been verified.
Legal basis for ethical behavior of civil servants in Ukraine: some problematic issues
Authors: Vasylovych Zvarych Roman , Yosypivna Havretska Maryna , Ihorovych Andrukhiv Oleh , Mykolayivna Kaleniuk Oksana , Yosypovych Boiko Ihor
Published: March 2021

The objective of the article is to consider the legal basis for regulating the rules of ethical conduct of civil servants in Ukraine and, at the same time, to compare them with the relevant legislative framework of other countries. The subject of the study is the analysis of the legal basis for regulating the rules of ethical conduct of public officials in Ukraine. The research methodology includes the following methods: normative and dogmatic method, hermeneutic method, method of analysis and synthesis, dialectical method, legal and comparative method, legal modeling method. It is concluded that there is only one special legal act to regulate the ethics of public officials in Ukraine, but it is not binding, as it does not have the appropriate legal means of influence. Practical involvement. Based on international experience, it was concluded that Ukraine should adopt its own Code of Ethics for public officials.
Online mediation due to the quarantine caused by COVID-19 Pandemic
Authors: Dontsov Denys , Neugоdnikov Andrii , Bignyak Oleksandr , Kharytonova Olena , Panova Liydmyla
Published: March 2021

The institute of mediation is becoming increasingly popular. This is due to several factors, including the possibility to save on attorneys' fees and court costs. Mediation also helps to save a lot of time and find a solution to the conflict that would satisfy both parties as quickly as possible. During the pandemic, the institution of mediation, like many other spheres of public life, moved online. The mediation process itself involves individuals who use online communication or even artificial intelligence, such as chatbots. Thus, in connection with the transition of mediation to the online plane, there is a need for legal support for the use of innovative technologies in the field of mediation. Thus, the article is relevant and timely in terms of quarantine restrictions. The object of research is public relations in the field of online mediation. The authors of the article used general and special research methods. The authors of the article concluded that online mediation is a useful institution, but the implementation of appropriate procedures must take care to protect private information, as there is no full control over the situation outside the camera of a computer, tablet, phone, or other device with access on the Internet.
A Systematic Review on Automatic Detection of Plasmodium Parasite
Authors: Amin Siddiq Sumi  , Nugroho Hanung Adi , Hartanto Rudy
Published: March 2021

Plasmodium parasite is the main cause of malaria which has taken many lives. Some research works have been conducted to detect the Plasmodium parasite automatically. This research aims to identify the development of current research in the area of Plasmodium parasite detection. The research uses a systematic literature review (SLR) approach comprising three stages, namely planning, conducting, and reporting. The search process is based on the keywords which were determined in advance. The selection process involves the inclusion and exclusion criteria. The search yields 45 literatures from five different digital libraries. The identification process finds out that 28 methods are applied and mainly categorizes as machine learning algorithms with performance achievements between 60% and 95%. Overall, the research of Plasmodium parasite detection today has focused on the development with artificial intelligence specifically related to machine and deep learning. These approaches are believed as the most effective approach to detect Plasmodium parasites.
Adaptation aux risques naturels et incertitudes climatiques en milieu soudano-sahélien au Cameroun
Authors: SAHA Frédéric
Published: March 2021

Le climat soudano-sahélien règne sur la région de l’Extrême-Nord du Cameroun. Cette région présente le plus grand retard socioéconomique du pays (INS, 2015). La faible productivité du milieu et la forte croissance démographique sont entre autres les principaux facteurs explicatifs. Cette région se raccorde à la bande sahélienne du continent africain caractérisée par une longue saison sèche. Le contexte contemporain des changements climatiques est un défi supplémentaire pour les populations de cette zone. Cette contribution met en exergue les différents visages de l’incertitude climatique qui affecte essentiellement les précipitations dans la région de l’Extrême-Nord du Cameroun. Une analyse de l’incidence de cette incertitude sur les initiatives d’adaptation est ensuite livrée. Les investigations reposent sur une enquête de terrain menée dans les six départements que compte cette région. En outre, l’analyse des données pluviométriques permet de faire différentes observations. Il en ressort que les variations saisonnières et interannuelles des précipitations sont difficilement prévisibles. Même l’orientation du changement est variable d’une année à une autre, cela complique les initiatives d’adaptation aux risques dans cette zone.