bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Generalization of Archimedes’ Theorem on the Area of a Parabolic Segment
Authors: Grigoryan Armen , Ignaciuk Szymon , Parol Maciej 
Published: July 2021

Abstract
Archimedes’ well known theorem on the area of a parabolic segment says that this area is 4/3 of the area of a certain inscribed triangle. In this paper we generalize this theorem to the n-dimensional euclidean space, n ≥ 3. It appears that the ratio of the volume of an n-dimensional solid bounded by an (n − 1)-dimensional hyper-paraboloid and an (n − 1)-dimensional hyperplane and the volume of a certain inscribed cone (we analogously repeat Archimedes’ procedure) depends only on the dimension of the euclidean space and it equals to 2n/(n +1).
Differential privacy based classification model for mining medical data stream using adaptive random forest
Authors: Fatlawi Hayder K. , Kiss Attila 
Published: July 2021

AbstractMost typical data mining techniques are developed based on training the batch data which makes the task of mining the data stream represent a significant challenge. On the other hand, providing a mechanism to perform data mining operations without revealing the patient’s identity has increasing importance in the data mining field. In this work, a classification model with differential privacy is proposed for mining the medical data stream using Adaptive Random Forest (ARF). The experimental results of applying the proposed model on four medical datasets show that ARF mostly has a more stable performance over the other six techniques.
On ordering of minimal energies in bicyclic signed graphs
Authors: Pirzada S. , Shamsher Tahir , Bhat Mushtaq A. 
Published: July 2021

Abstract
Let S = (G, σ) be a signed graph of order n and size m and let x1, x2, ..., xn be the eigenvalues of S. The energy of S is defined as

ɛ

(
S
)

=

∑

j
=
1

n

|

x

j

|

\varepsilon \left( S \right) = \sum\limits_{j = 1}^n {\left| {{x_j}} \right|}

. A connected signed graph is said to be bicyclic if m=n + 1. In this paper, we determine the bicyclic signed graphs with first 20 minimal energies for all n ≥ 30 and with first 16 minimal energies for all 17 ≤ n ≤ 29.
Fog-LAEEBA: Fog-assisted Link aware and energy efficient protocol for wireless body area network
Authors: Ullah Kifayat , Khan Haris 
Published: July 2021

Abstract
The integration of Wireless Sensor Networks (WSN) and cloud computing brings several advantages. However, one of the main problems with the existing cloud solutions is the latency involved in accessing, storing, and processing data. This limits the use of cloud computing for various types of applications (for instance, patient health monitoring) that require real-time access and processing of data. To address the latency problem, we proposed a fog-assisted Link Aware and Energy E cient Protocol for Wireless Body Area Networks (Fog-LAEEBA). The proposed solution is based on the already developed state-of-the-art protocol called LAEEBA. We implement, test, evaluate and compare the results of Fog-LAEEBA in terms of stability period, end-to-end delay, throughput, residual energy, and path-loss. For the stability period all nodes in the LAEEBA protocol die after 7445 rounds, while in our case the last node dies after 9000 rounds. For the same number of rounds, the end-to-end delay is 2 seconds for LAEEBA and 1.25 seconds for Fog-LAEEBA. In terms of throughput, our proposed solution increases the number of packets received by the sink node from 1.5 packets to 1.8 packets. The residual energy of the nodes in Fog-LAEEBA is also less than the LAEEBA protocol. Finally, our proposed solution improves the path loss by 24 percent.
Studies on perchlorate levels in powdered infant formulas available on the Polish market
Authors: Nizinski Przemyslaw , Wisniewska Patrycja , Kulinowska Magdalena , Blazewicz Anna 
Published: July 2021

Abstract
Perchlorate has been acknowledged as a health threat due to its ability to interfere with iodine uptake by the thyroid gland. Infants and developing newborns have been considered as the most vulnerable groups to the perchlorate toxicity. A crucial source of perchlorate ingestion are powdered infant formulas. This study was designed to measure perchlorate content in thirty-one powdered infant formulas available on the Polish market. A rapid and sensitive ion chromatography method – conductivity cell detection – was applied to determine

ClO

4
−

{\rm{ClO}}_4^ -

content. Limit of detection (0.150 µg/L) and limit of quantification (0.450 µg/L) were assessed. Collected samples were classified by the age of consumers: first stage, until the baby is six months old and follow-on formula for older children. Geometric mean of perchlorate concentration of 1.041 µg/L and 0.857 µg/L in the groups of the first stage and follow-on formulas were calculated, respectively. A health risk assessment revealed that the Tolerable Daily Intake (TDI) for perchlorate (0.3 µg/kg body weight/day) was exceeded only in a few milk samples. The findings suggest that perchlorate contamination of powdered infant formulas may not to be an immediate health issue, yet testing for

ClO

4
−

{\rm{ClO}}_4^ -

should continuously be conducted. To the best of our knowledge, this is the first study concerning perchlorate content in infant formulas in Poland.
Histopathological nephrotoxic features of high oral doses of ubiquinone in rats
Authors: Abdullah Ali Ghanim , Sedeeq Ban Ismael , Azzubaidi Marwan Saad 
Published: July 2021

Abstract
Co-enzyme Q10 (Co-Q10) plays a key role in the cellular respiration for the production of ATP. The toxicity of quinones to the kidney appears to depend on variety of factors, including genetic polymorphisms and the individual’s comorbidites. The aim of the present study was to assess histologically the nephrotoxic effects of 6 weeks daily oral intake of Co-Q10 in experimental animals.
Twenty-five Wistar rats weighing between 220-270 g were randomly divided into two groups: experimental “treated” and control “untreated” groups (n=15, n=10, respectively). The animals of the experimental group received 300 mg/kg daily dose of gelatinous capsules of Co-Q10 by oral gavage for six weeks. At the end of the study, all animals were sacrificed under general anesthesia and samples of the kidneys were excised for microscopic histopathological assessment of renal tissue using stain. The experimental group showed a range of mild to severe dilatation of Bowman’s space, with a mean corpuscular diameter of 294±38 µm that was significantly higher (p <0.05) than that of the untreated control group 208±31 µm. Shrinkage to complete destruction of the glomeruli was observed in the experimental group only. The long-term use of high doses of Co-Q10 had revealed a selective nephrotoxicity towards podocytes. This might be a risk factor leading to renal proximal tubular necrosis in rats and the subsequent renal function deterioration.
Om Claude Marchant: Ett historiografiskt bidrag till svart danshistoria i Sverige
Authors: von Rosen Astrid 
Published: July 2021

Abstract
In this article, the concept of «black dance» is used as a critical tool to explore the lifelong dance achievements of the black dancer, choreographer and pedagogue Claude Marchant (1919–2004) in relation to history making. Marchant’s history in the US and to some extent in Europe from the 1930s to the 1960s is mapped and analysed, with the aim of better understanding his work in Sweden, and more specifically in Gothenburg. While Marchant is mentioned in previous dance historiographies, there are no in-depth explorations of his life and work. This exploration, therefore, complements both Swedish and international dance research, with an example that problematises history production in relation to black artists such as Marchant. It is argued that a participatory «dance-where-we-dig» method is a useful tool for instigating locally situated historiographical processes of change, and can relate artists such as Marchant to broader, transnational contexts.
The Impact of Internal Knowledge Sharing on Sales Department’s Innovativeness and New Product Commercialization
Authors: Ružić Erik , Benazić Dragan 
Published: July 2021

Abstract

Background and Purpose: Innovativeness and new product commercialization are highly important for companies. Therefore, a deep understanding of the impact of all potentially influential drivers of success is critical. The purpose of the paper is to explore the impact of internal knowledge sharing on new product selling and sales innovativeness as well as the impact of empowerment on internal knowledge sharing and, indirectly, on new product selling and sales innovativeness.

Design/Methodology/Approach: The research encompassed 101 salespeople working at the top 1000 value added creators in Croatia. The questionnaire was developed and adapted using four scales, to assess internal knowledge sharing, new product selling, sales innovativeness, and empowerment. The data was analyzed by using the PLS-SEM method to examine the relationships between constructs.

Results: As evidenced by the survey results, internal knowledge sharing positively impacts new product selling and sales department’s innovativeness, and empowerment is positively linked to internal knowledge sharing and, indirectly, to new product selling and sales department’s innovativeness.

Conclusion: Managers should underpin different activities in order to enhance empowerment and internal knowledge sharing with the aim to affect companies’ performance in commercialization of a new product and sales department’s innovativeness. Future research could include moderator variables between the empowerment construct and the internal knowledge sharing construct and deepen the insight into the type of information shared, the dynamics of sharing and the barriers in the process, and other factors that positively affect knowledge sharing.
PERSPECTIVES OF DIGITAL TRANSFORMATION OF THE TOURIST SECTOR OF THE ECONOMY OF UKRAINE
Authors: Marynyak Yaroslav , Stetsko Nadiia 
Published: July 2021

The role and meaning of tourism in development of national economy are estimated. Today in practice of the statistical accounting of Ukraine is absent the common approach to data collection of results of functioning of subjects of the tourist sphere. This reason complicates carrying out the objective analysis of the parameters estimating a real condition of a tourist industry.
The impossibility of tracking of values of the specific indicators estimating a tourism status in dynamics and space, leads to the fact that planning of development of tourist sphere at the level of regions and all country usually perform verbally. Such approach complicates planning of all national economy due to the lack of a comparability of data with the main macroeconomic indicators accepted and used around the world. The reasons for need of forming the common system of the statistics and analysis of tourism in the Ukraine, conforming to requirements of modern macroeconomic accounting and the analysis, created prerequisites for a system research of the international experience accumulated and approved in this sphere by the international organizations and the certain countries.
Nowadays Ukraine pays much attention to the development of methodology for the estimation of the multiplier effect of tourism and hospitality industry. Satellite accounts represent a set of statistics which are intended for profound studying of any separate economic problem. Tourism satellite accounts allow calculating the share of tourism in GDP, employment, investment, government revenues and supposing calculation of the following specific macroeconomic aggregates: value added of the tourism industry, tourism value added, and tourism gross domestic (regional) product. Indicators of satellite accounts allow calculating the multiplier effect of tourism development. In foreign practice the tourist multiplier is divided into three main types - the multiplier output, employment and income.
In conducted research are revealed the main approaches to forming the system of the statistics and the analysis used in world practice, capable to be adapted and fragmentary implemented in the Ukraine statistics system.
The article revealed that now at the level of specific regions are already developed and implemented the own systems of collection and handling of the statistical data of tourism sphere. Observed statistics systems are allow carrying out the multidimensional and deep analysis of a status and development of regional tourism and corresponding to the researched approaches of modem international methods of statistics and analysis of the tourist sphere. Authors offered the alternative methods of calculation of number of tourists, which can be added to approve systems of the regional tourism statistics.
Key words: tourism policy, digital economy, tourism statistics.
FOREST FUND OF RIVNE REGION: STRUCTURE AND DYNAMICS
Authors: Stelmakh Valentyna , Melniichuk Mykhailo 
Published: July 2021

In the article, we investigated the current state of the forest fund of Rivne region, which is in the process of reform. We analyzed the dynamics of forest-covered lands from the 1996 to the present time. Forests of Rivne region by ecological and socio-economic significance and depending on the main functions performed by them are divided into the following categories: protective forests - 45085.4 ha, operational forests - 527010.3 ha, recreational and health forests - 63821,8 ha, forests of nature protection, scientific, historical and cultural purpose - 78253.9 ha. The study of the forest species in the Rivne region showed a predominance of coniferous species – 65 % (softwood – 25 %, hardwood – 10 %). The dominant species were found: pine – 65 %, birch hung – 14,8 %, alder black – 10 %, ordinary oak – 8.6%. The study of the age structure of the forests makes it possible to talk about its unevenness, since 12.5 % belong to ripe and overgrown forest stands, 23.4 % to young, 40.1 % to medieval. Average age of forest stands of the forest fund: coniferous – 54 years, hardwood – 71, softwood – 44. The study of the age structure showed the progressive aging of forests, an increase in the average age of over 10 years and an increase in the area of perennial plantings. Distribution of tree stands by age classes showed that the largest share of areas among all groups of rocks is occupied by trees of 5–7 classes of age, that is, medieval plantations. The youngest classes age 1–4 are most widely presented among softwood, 10–15 grades – among hardwood (about 20 %). That is, the smallest life spans are soft leafy breeds, and the longest are hard leafy breeds. In the study of the productivity of the tree plant, the following indicators, such as bonite, completeness, and stock of wood, have been studied, which made it possible to draw conclusions about the average productivity of the forests of the region. Woods of the Rivne region are marked by high classes of bonitet. The I and II bonitty classes make up more than 34 %. According to our estimates, the middle class of the forest stand bonite in the forest fund of the region is equal to I,72. The average completeness of plantations of the Rivne region is close to optimal and is 0.70. The most complete plantings are found: conifers, and the least – leafy. In the study of the productivity of the tree plant, the following indicators, such as bonite, completeness, and stock of wood, have been studied, which made it possible to draw conclusions about the average productivity of the forests of the region. The rocks of the forests are the closest to optimal. The main areas of forest ecologization in the Rivne region should be the multi-purpose use of forest resources and the continuity of forest use.
Key words: forest, forest landscape, forest type, woodland, flood, forest fund, species composition, age structure, bonite class, completeness, forest use, reforestation.
ОСОБЕННОСТИ ВЫДЕЛЕНИЯ МЕТАЛЛИЧЕСКИХ ПРОДУКТОВ ПРИ ФОТО- И ЭЛЕКТРОПОЛЕВОМ РАЗЛОЖЕНИИ АЗИДОВ СВИНЦА И СЕРЕБРА
Authors: Иванов Ф.И. , Захаров Ю.А. , Исакова Е.В. 
Published: July 2021

В работе при исследованиях структуры поверхности АТМ, топографии распределения и морфологии твердофазного продукта разложения при воздействии УФ-света и электрополя использовалась электронная микроскопия платиноуглеродных реплик в сочетании с электронным зондированием. Исследования проводились на электронном микроскопе УЭВМ-100К. Платиноуглеродная реплика напылялась на поверхность нитевидного кристалла (НК) АТМ в вакуумном посту ВУП-2К под углом 30° к нормали поверхности кристалла. Толщина напыляемой реплики варьировалась от 15 до 20 нм. Отделение реплик от матрицы азида осуществлялось при растворении АТМ в соответствующих растворителях. Нитевидные кристаллы азида свинца моноклинной сингонии (b-PbN6) выращивались методом химической транспортной реакции в условиях встречной диффузии растворов азида натрия и нитрата свинца. Фотохимическое разложение (ФХР) нитевидных кристаллов азидов тяжелых металлов прово-дилось светом из области фундаментального поглощения с длиной волны 365¸366,5 нм. В качестве источника ультрафиолетового излучения использовали ртутную лампу ПРК-4 мощностью 400 Вт. Для выделения линии 365¸366,5 нм применяли комбинацию светофильтров УФС 6-3 и УФС 6-5 с водяным фильтром. Интенсивность света оценивали методом ферриоксалатной актинометрии Паркера-Хатчарда. Рабочий диапазон интенсивностей освещения составлял 1017¸1019 квант/(м2×с). Нитевидные кристаллы АТМ ориентировали нормально к световому потоку широкой гранью. Облучение проводили в изотермических условиях с точностью термостатирования ±1 К. Обнаружено наличие зародышей свинца двух типов: плоских-поликристаллических, располагающихся на глубине 0,5 мкм от поверхности; в виде механически напряженных глобул – монокристаллических образований, вытянутых в направлении [100]. Обсужден механизм спонтанного зародышеобразования, включающий коагуляцию предварительно восстановленных атомов или ионов в области обогащения вблизи дислокации или доменной стенки. Определен критический радиус коалесценции зародышей свинца и оценена по уравнению Томпсона-Фрейдлиха концентрацией междоузельных атомов свинца, которая оказалась в соответствии с концентрациями определяемыми другими методами. Зародыши серебра являются поликристаллическими как в объёме, так и на поверхности.
Assessing Kazakhstani wheat varieties by yield indicators and resistance to rust
Authors: Sekerova T. , Tileubayeva Zh. , Ydyrys A. , Aitzhanova M. , Bakirova K. , Mutlu Mehmet , Admanova G. 
Published: July 2021

According to the experts of the Food and Agriculture Organization (FAO), the annual global loss of products from diseases and pests of agricultural crops in 1986-1990 was 52.2 million from 1998-2005 from a conventional unit of grain to 70 million tons. One of the factors that reduce the yield indicators of grain crops, contributing to a sharp decrease in yield, is the rust disease, which causes damage to grain crops, except for wheat Aegilops, Elymus, Agropyron, etc. The problem of contamination of grain crops with phytopathogenic fungi is quite a serious problem for the countries of Central Asia, since, according to FAO, this region is characterized by a higher level of bread consumption per capita (about 200 kg per year), and agriculture is considered as one of the key factors of the economy. The cost of production is an economic factor and negatively affects the sustainable development of agricultural production. A comprehensive study of the source material obtained in breeding, the replacement of ineffective ones with effective ones, makes it possible to suppress the rate of development of the pathogen and prevent epiphytosis. The evolution of the adapted parasite is accompanied by the evolution of the host plant. The article examines the complex resistance of domestic and foreign wheat varieties to rust in an artificial epidemic environment. Over the years of research, a comparative analysis of the resistance of wheat varieties to diseases has been carried out. Field tolerance was noted in the varieties Almaly, Arap, Zhakut, Naz with 3-4 points, in the varieties Samar and Zhalyn with 2 points. As a result of the structural analysis of the yield of winter wheat varieties allowed for sowing in production and promising, a decrease in these indicators was found under the influence of the disease.
Analisis Sikap dan Minat Peserta Didik Belajar di SMP Muhammadiyah 15 Surabaya
Authors: Khoiruddin Mr 
Published: July 2021

Penelitian ini bertujuan untuk mengetahui sikap dan minat peserta didik smp muhammadiyah 15 surabaya, penelitian ini dilakukan dengan pendekatan kuantitatif deskriptif, dengan jumlah 22 responden. Data diperoleh melalui angket dengan pertanyaan yang relevan. Kemudian data yang diperoleh dianalisis secara deskriptif melalui persentase dan diolah dengan frekuensi dibagi dengan jumlah responden dikali 100 %. Berdasarkan hasil analisis yang dilakukan, dapat diidentifikasikan secara seginifikan, maka hasil dari keseluruhan rata-rata indikator yaitu indikator sikap dengan persentase terbesar 18 (82 %) pada kategori skor ’tidak pernah’ dengan jumlah rata-rata 2,54 dan indikator minat terbesar 15 (68,1 %) pada kategori skor ’tidak pernah’ dengan jumlah rata-rata 2,44, rata-rata keseluruhan sebesar 2,85 %.
Pengaruh Penerapan Pembelajaran Berorientasi Aktivitas Siswa Dan Motivasi Belajar Terhadap Prestasi Belajar Siswa Kelas IX SMP Negeri 3 Kabupaten Pamekasan
Authors: Sutanti Tiwuk 
Published: July 2021

This research related to Implementation of instruction based students’ activities and Students’ learning Motivation toward students’ learning achievementt of Ninth Grade Students State Junior High School 3 Pamekasan regency . The students’ learning achievementt is influenced by Implementation of instruction based students’ activities. Additionally it is influenced by Students’ learning Motivation. Good and regularly Implementation of instruction based students’ activities brings a positive effect on the students’ learning achievement and a high learning motivation in teaching will increase the students achievement. The purpose of this research is (1) to describe Implementation of instruction based students’ activities toward students’ learning achievement. (2) to describe the significant influence of the Students’ learning Motivation toward students’ learning achievement . (3) to describe the significant influence of Implementation of instruction based students’ activities and Students’ learning Motivation simultaniously toward students’ learning achievement. The design of this research is descriptive quantitative. The subject of the research is Ninth Grade Students of State Junior High School 3 Pamekasan. The data collecting technique is by giving some questionnaires. Data analyzing technique used patial and multi-regression computerized SPSS 17.00 program for windows. The Result and the discussion as follows: a) There is a significant influence on the Implementation of instruction based students’ activities (X1) toward students’ learning achievement is about 0,312. b) There is a significant influence on the Students’ learning Motivation (X2) toward students’ learning achievement is about 0,062 by the significanct level 0,000, on t-account, that means smaller than 0,05. It can be concluded that X1 and X2 are very significant. c) There is a significant influence on the Implementation of instruction based students’ activities and Students’ learning Motivation simultaneously toward students’ learning achievement is about 17,617 by the significanct level 0,000, on F-account, that means smaller than 0,05. It can be concluded that X1 and X2 are very significant toward Y.