bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acute cardiac side effects after COVID-19 mRNA vaccination: a case series
Authors: Freise Noemi F. , Kivel Milena , Grebe Olaf , Meyer Christian , Wafaisade Bahram , Peiper Matthias , Zeus Tobias , Schmidt Jan , Neuwahl Judith , Jazmati Danny , Luedde Tom , Bölke Edwin , Feldt Torsten , Jensen Björn Erik Ole , Bode Johannes , Keitel Verena , Haussmann Jan , Tamaskovics Balint , Budach Wilfried , Fischer Johannes C. , Knoefel Wolfram Trudo , Schneider Marion , Gerber Peter Arne , Pedoto Alessia , Häussinger Dieter , van Griensven Martijn , Rezazadeh Amir , Flaig Yechan , Kirchner Julian , Antoch Gerald , Schelzig Hubert , Matuschek Christiane 
Published: June 2022

Abstract
Background
Vaccination against SARS-CoV-2 has been the main tool to contain the pandemic. The rush development of the 3 vaccines and their expedited approval have led to inoculation of millions of patients around the world, leading to a containment of the disease. Despite continuous viral mutations and the identification of weaker variants, the severity of the infections has been mild, with many patients being either asymptomatic or recovering at home. Currently the focus has shifted from the host of organ damage related to the infection to potential side effects of the vaccine. Myocarditis has been reported as one of the potential side effects from the mRNA vaccine, affecting young healthy individuals.
Up to September 30, 2021, 1.243 cases of myocarditis after vaccination with BNT162b2 Comirnaty© were registered in young adults by the Paul-Ehrlich-Institute in Germany alone. The exact pathophysiology and the risk factors for myocarditis following vaccination remain unclear. We present a case series of eight patients with cardiac symptom shortly after SARS-CoV-2 mRNA vaccination (BNT162b6, Biontech, Comirnaty© or mRNA-1237 Moderna, Spikevax©).

Patients and methods
Eight patients between 13 and 56 years of age, vaccinated with either BNT162b2 or mRNA-1273 mRNA vaccine between January and August 2021 developed cardiac side effects shortly after either their first or second dose of the vaccine. Clinical data were retrieved from the clinical information system and analyzed. To support diagnosis of myocarditis or pericarditis, cardiac magnetic resonance imaging (MRI) was performed shortly after the onset of symptoms, with further investigations in severe cases. Symptoms were defined as dyspnea, chest pain and cardiac arrhythmia as determined by electrocardiography.

Results
Eight patients (5 males and 3 females) developed cardiac symptoms compatible with myocarditis, according to the CDC criteria, shortly after SARS-CoV-2 mRNA vaccination. Three patients (2 males, 1 female) required hospitalization due to severe chest pain and elevated troponin levels. All patients recovered fully within 7 days from the symptom onset.

Conclusions
Our data suggest that cardiac adverse events such as myocarditis or pericarditis shortly after SARS-CoV-2 mRNA vaccination are rare but possible and occur particularly in male patients.
Efficient spatial data partitioning for distributed $$k$$NN joins
Authors: Zeidan Ayman , Vo Huy T. 
Published: June 2022

AbstractParallel processing of large spatial datasets over distributed systems has become a core part of modern data analytic systems like Apache Hadoop and Apache Spark. The general-purpose design of these systems does not natively account for the data’s spatial attributes and results in poor scalability, accuracy, or prolonged runtimes. Spatial extensions remedy the problem and introduce spatial data recognition and operations. At the core of a spatial extension, a locality-preserving spatial partitioner determines how to spatially group the dataset’s objects into smaller chunks using the distributed system’s available resources. Existing spatial extensions rely on data sampling and often mismanage non-spatial data by either overlooking their memory requirements or excluding them entirely. This work discusses the various challenges that face spatial data partitioning and proposes a novel spatial partitioner for effectively processing spatial queries over large spatial datasets. For evaluation, the proposed partitioner is integrated with the well-known k-Nearest Neighbor ($$k$$
k
NN) spatial join query. Several experiments evaluate the proposal using real-world datasets. Our approach differs from existing proposals by (1) accounting for the dataset’s unique spatial traits without sampling, (2) considering the computational overhead required to handle non-spatial data, (3) minimizing partition shuffles, (4) computing the optimal utilization of the available resources, and (5) achieving accurate results. This contributes to the problem of spatial data partitioning through (1) providing a comprehensive discussion of the problems facing spatial data partitioning and processing, (2) the development of a novel spatial partitioning technique for in-memory distributed processing, (3) an effective, built-in, load-balancing methodology that reduces spatial query skews, and (4) a Spark-based implementation of the proposed work with an accurate $$k$$
k
NN spatial join query. Experimental tests show up to $$1.48$$

1.48

times improvement in runtime as well as the accuracy of results.
Oscillation of linear third-order impulsive difference equations with variable coefficients
Authors: Tripathy A. K. , Chhatria G. N. 
Published: June 2022

AbstractThe present work discusses the qualitative behaviour of solutions of third-order difference equations of the form: $$\begin{aligned} w(l+3)+a(l)w(l+2)+b(l)w(l+1)+c(l)w(l)=0,\,l\ne \theta _{k},\,l\ge l_{0} \end{aligned}$$

w

(
l
+
3
)

+
a

(
l
)

w

(
l
+
2
)

+
b

(
l
)

w

(
l
+
1
)

+
c

(
l
)

w

(
l
)

=
0
,

l
≠

θ
k

,

l
≥

l
0

subject to the impulsive condition $$\begin{aligned} w(\theta _{k})=\alpha _{k} w(\theta _{k}-1),\, k\in {\mathbb {N}}. \end{aligned}$$

w

(

θ
k

)

=

α
k

w

(

θ
k

-
1
)

,

k
∈
N
.

Our state of the art is the inequality technique under the control of fixed moments of impulsive effect. We give some numerical examples to illustrate our findings.
ASSESSMENT OF PROSPECTS FOR THE DEVELOPMENT OF RURAL TOURISM IN THE ALTAI TERRITORY
Authors: Petrova M. V. 
Published: June 2022

In recent years, against the background of the coronavirus pandemic in Russia, the importance of domestic tourism has been increasing. Prospects for the development of rural tourism are associated with the implementation of state support measures for tourism in Russia, adopted in 2021, which was declared the Year of Rural Tourism by the World Tourism Organization (UNWTO). The article assesses the prospects for the development of rural and ecological tourism in the Altai Territory, taking into account the specifics of natural conditions and cultural and historical features of the region.
Altai Krai has favorable natural and climatic conditions for the development of rural tourism. Currently, a state program to support the development of tourism in the region is being implemented. Based on the research carried out by the author, recommendations were developed to reveal the potential of rural tourism development as an important direction of sustainable rural development. The implementation of the developed recommendations will contribute to increasing the attractiveness of rural and ecological tourism in the Altai Territory, and in general, the development of domestic tourism in Russia.
Topology optimization of computer communication network based on improved genetic algorithm
Authors: Ai Hua , Fan Yuhong , Zhang Jilei , Ghafoor Kayhan Zrar 
Published: June 2022

Abstract
The topology optimization of computer communication network is studied based on improved genetic algorithm (GA), a network optimization design model based on the establishment of network reliability maximization under given cost constraints, and the corresponding improved GA is proposed. In this method, the corresponding computer communication network cost model and computer communication network reliability model are established through a specific project, and the genetic intelligence algorithm is used to solve the cost model and computer communication network reliability model, respectively. It has been proved that GA can solve the complex problems of computer working environment better, which is 80% higher than the general algorithm, and can select the optimal scheme pertinently.
Computational study of subcooled water injection into steam line: effect of Reynolds number on flow transition to study condensation induced water hammers
Authors: Quddus Abdul , Shah Ajmal , Qureshi Kamran Rasheed , Ayub Muhammad Khawar , Iqbal Mazhar , Samee Abdus 
Published: June 2022

Abstract
The direct contact condensation (DCC) of steam in subcooled water encounters in wide range of the industrial applications. On one side, it is an efficient and rapid, mass and heat transfer phenomenon. But, on the other side, it may generate condensation induced water hammers (CIWH) events which may cause high pressure peaks resulting in severe damage to the mechanical systems. This computational study intends to explore the underlying physics of CIWH events while injecting subcooled water into steam filled horizontal pipe section. The Reynolds number is varied from, Re
w
= 60,750 to 646,900, to study the flow regimes (stratified and slug), onset of CIWH and local flooding conditions. The results have been compared with the published data and found in good agreement. It has been observed that for Re
w
= 182,300, flow remains stratified. However, the flow regime changes from stratified to slug flow at Re
w
= 303,850–646,900, possibly due to the onset of CIWH. Extensive steam pockets have been observed at Re
w
= 303,850, which may be considered as onset of CIWH. Local flooding condition is also started at Re
w
= 303,850 and is observed to be shifted upstream with the increase in Reynolds number. This study is considered to be useful for the safe design and economical operation of the relevant systems in nuclear and other related industry.
Compressibility-Based Interpretation of Cone Penetrometer Calibration Chamber Tests and Corresponding Boundary Effects
Authors: Gamez Joseph A. , Olson Scott M. 
Published: June 2022

AbstractCalibration chambers have been used to calibrate in situ testing devices (e.g., standard penetration test, cone penetration test, and flat plate dilatometer) in laboratory settings. Researchers have long suggested, however, that penetration resistance measured in a calibration chamber differs from what would be measured under similar conditions in the free field due to the finite chamber size and chamber boundary conditions. Using a database of 847 cone penetration tests performed in sand-filled calibration chambers, this paper reexamines assumptions used to interpret tests and boundary effects, analyzes the efficacy of published calibration chamber correction factors, and provides a novel framework for interpreting calibration chamber data based on soil compressibility. This study suggests that (1) trends in cone tip resistance are relatively unaffected by boundary effects; (2) factors used to correct calibration chamber cone tip resistance to an equivalent free-field value only marginally improved the correlations/trends; and (3) cone tip resistance is similar for soils of equally similar compressibility, density, and effective confining stress. The authors suggest that calibration chamber data may not require corrections for chamber size or boundary conditions so long as a ratio of chamber diameter to cone penetrometer diameter of 20 is satisfied.
Pemahaman Konsep Pemrograman Melalui Modul Problem Based Learning
Authors: Hasanah Fitria Nur 
Published: June 2022

Pemahaman konsep pemrograman berorientasi objek adalah kemampuan untuk menerjemahkan atau menangkap maksud dari konsep pemrograman berorientasi objek. Mahasiswa dikatakan telah memahami konsep pemrograman jika mereka dapat menerapkan logika berfikir yang telah mereka pahami dalam kegiatan belajar. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan modul PBO berbasis PBL pada pemahaman konsep pemrograman dan tingkat pengaruh penggunaan modul PBO berbasis PBL terhadap pemahaman konsep pemrograman mahasiswa dalam Program Studi Pendidikan Teknologi Informasi. Jenis penelitian yaitu kuantitatif dengan desain pra-eksperimental tipe One - Group Pretest-Posttest Design dengan teknik pengambilan sampel purposive sampling. Sampel dalam penelitian ini adalah mahasiswa yang telah mengampuh mata kuliah PBO sejumlah 20 mahasiswa. Instrument yang digunakan yaitu tes pemahaman konsep dan angket respon mahasiswa yang dianalisis menggunakan analisis regresi sederhana. Pertanyaan tes diberikan sebelum dan sesudah proses pembelajaran dengan menggunakan modul PBO berbasis PBL dan merujuk pada indikator pemahaman konsep sesuai dengan capaian mata kuliah. Hasil uji hipotesis menunjukkan nilai sig 0,03 <0,05 maka H0 ditolak, dari hasil tersebut dapat disimpulkan bahwa ada pengaruh modul PBO terhadap pemahaman konsep pemrograman mahasiswa dengan besar pengaruh adalah 40,6%.
Learning Motivation, Self-Regulated Learning, And Mathematical Communication Skills Verbal And Written By Students' In Learning Mathematics During The Covid-19 Pandemic
Authors: Efriyadi Dodi , Nurhanurawati Nurhanurawati 
Published: June 2022

This study aims to determine (1) how the learning motivation, self-regulated learning and verbal mathematical communication skills of students; and (2) how are students' learning motivation, self-regulated learning and mathematical communication skills in writing mathematics learning during the covid-19 pandemic. The research used is a mixed method type Sequential Exploratory Design. The population is students of class XI IPA SMA Negeri 1 Pringsewu. Data was collected using questionnaires, observations, documentation and written mathematical communication skills tests. The results of the study show that learning mathematics during the Covid-19 pandemic where learning motivation and self-regulated learning directly affect students' written mathematical communication skills, but verbal mathematical communication skills really need to be considered because they are still in the low category.Penelitian ini bertujuan untuk mengetahui (1) bagaimana kemampuan komunikasi matematis secara lisan peserta didik; dan (2) bagaimana motivasi belajar, kemandirian belajar dan kemampuan komunikasi matematis secara tulis peserta didik dalam pembelajaran matematika pada masa pandemi covid-19. Penelitian yang digunakan adalah mixed methods tipe Sequential Exploratory Design. Populasi dalam penelitian ini adalah peserta didik kelas XI IPA SMA N 1 Pringsewu. Pengumpulan data menggunakan kuesioner, observasi, dokumentsi dan tes kemampuan komunikasi matematis tulis. Hasil penelitian menunjukkan pembelajaran matematika selama pandemi Covid-19 dimana motivasi belajar dan kemandirian belajar mempengaruhi secara langsung kemampuan komunikasi matematis secara tulisan peserta didik, tetapi kemampuan komunikasi matematis secara lisan sangat perlu di perhatikan karena masig tergolong dalam kategori rendah.
Cognitive Development of Mathematics Education Students based on Piaget's Theory in terms of Gender Differences
Authors: Laja Yosepha Patricia Wua , Hijriani Lailin 
Published: June 2022

This study aims to understand the cognitive development of mathematics education students based on Piaget's theory in terms of gender differences. This research method is descriptive quantitative research with the research subjects being students of mathematics education at Timor Universities. Students' cognitive development was measured using the Logical Operations Test (LOT), which consisted of 14 numbers. LOT questions are given to students, the results are analyzed and described. The results showed that the cognitive development stage for females was 19.18% in the initial concrete stage, 36.99% in the final concrete stage, 13.70% in the initial formal stage and 1.37% in the final formal stage. Male at 9.59% in the initial concrete stage, 6.85% in the final concrete stage, 9.59% in the initial formal stage and 2.74% in the final formal stage. Meanwhile, students' understanding based on seven logical operations is in low understanding for each type.Penelitian ini bertujuan untuk mengetahui perkembangan kognitif mahasiswa pendidikan matematika berdasarkan teori Piaget ditinjau dari perbedaan jenis kelamin. Metode penelitian ini adalah penelitian deskriptif kuantitatif dengan subjek penelitian adalah mahasiswa pendidikan matematika Universitas Timor. Perkembangan kognitif mahasiswa diukur dengan menggunakan Tes Operasi Logis (TOL) yang berjumlah 14 nomor. Soal TOL diberikan kepada mahasiswa, hasilnya dianalisis dan dideskripsikan. Hasil penelitian menunjukkan bahwa tahap perkembangan kognitif sebesar 19,18% tahap konkret awal, 36,99 % tahap konkret akhir, 13,70% tahap formal awal dan 1,37% tahap formal akhir bagi mahasiswa perempuan. Sementara hasil pemetaan tahap perkembangan kognitif sebesar 9,59% tahap konkret awal, 6,85 % tahap konkret akhir, 9,59% tahap formal awal dan 2,74% tahap formal akhir bagi mahasiswa laki-laki. Sementara itu pemahaman mahasiswa berdasarkan 7 operasi logis berada dalam pemahaman rendah untuk masing-masing tipe.
Borated graphite cathodes for low-temperature aluminum electrolysis
Authors: Rudenko A. V. , Kataev A. A. , Neupokoeva M. M. , Tkacheva O. Yu. 
Published: June 2022

Electrochemical boriding of the graphite plates in the potassium cryolite based electrolytes was studied. The boriding were carried out in a cell with vertical electrodes. The procedure included 2 stages: 1) electrolysis in the KF–AlF3–KBF4 melt (CR=1.3) at low current density (0.01–0.02 A/cm2), required for the boron reduction, at 700 and 750 °C; 2) electrolysis in the KF–AlF3–Al2O3 melt at higher current density (0.2 A/cm2), required for the aluminum reduction. The optimal conditions of electrodeposition for obtaining the borated wettable cathodes were determined. According to the SEM data, a continuous AlB2 layer with a thickness of 7–10 μm was formed on the graphite surface. The borated graphite was tested as a wetted cathode during the low-temperature aluminum electrolysis. Prolonged electrolysis in a vertical cell with the graphite anode and the borated graphite cathode was carried out in the KF–NaF(10 wt.%)–AlF3–Al2O3 electrolyte (CR=1.5) at 830 °C. After 100 h of electrolysis, the thickness of the AlB2 layer on the graphite surface was 5 μm, while the cathode surface was completely wetted with aluminum. Thus, we demonstrated the feasibility of using the borated graphite cathode as a wettable dripping cathode in the low-temperature aluminum electrolysis in the vertical cell.
The current state of the veterinary drugs market in the Tyumen Region
Authors: Byshenko V. V. , Knysh О. I. , Zadirachenko L. N. , Egorova А. О. , Rodina Yu. S. 
Published: June 2022

Objective: to assess the current state of the veterinary medical product market in the Tyumen Region.Material and methods. The objects of the study included data from the State Register of Medicinal Products for Veterinary Use for 2019–2022; veterinary pharmacy organizations and veterinary clinics in the Tyumen Region (33); price lists of veterinary pharmaceutical organizations; questionnaires of veterinary specialists (69) and consumers of medicinal products for veterinary use (93).Results. An analysis of the Register of Medicinal Products for Veterinary Use registered in the Russian Federation revealed a positive trend in the registration of new positions: with 2190 registered drugs about 300 more positions are registered annually. It was determined that the ratio of veterinary drugs of various pharmacotherapeutic groups is critically uneven (31.05% – antibacterial agents; 28% – immunobiological drugs; 0.46% – cardiovascular drugs; 0.14% – antitumor drugs). The study of the wholesale segment of the veterinary drugs market on the territory of the Tyumen Region showed that the range of wholesale trade organizations in veterinary drugs mainly consists of products for animals (at the largest one veterinary drugs account for only 16%). As a result, low indicators of the assortment are observed (breadth and completeness coefficients for pharmacotherapeutic groups), and there are problems with the availability of veterinary drugs. The analysis of the assortment of veterinary pharmaceutical organizations and clinics (retail segment of the market) revealed low breadth coefficients for medicinal products for veterinary use (median 0.09). A sociological survey showed a low level of awareness of all veterinary drugs consumer groups about the scope of their circulation.Conclusion. The study of the current state of the veterinary medicinal product market in the Tyumen Region identified the problems of their availability both in the wholesale and retail segments, which need to be addressed with the help of state regulation (including the introduction of a minimum range of drugs for veterinary use) and normalization of the assortment policy at the level of veterinary pharmacies and clinics. Because of the lack of registration for some drugs necessary for the treatment of animals, veterinarians are forced to put into practice drugs for medical use, deliberately violating the law. Given the experience of many foreign countries, we consider it expedient to allow the use (in special cases) of medical drugs in veterinary medicine. This will solve the problem of pharmacotherapy availability and allow veterinarians to provide better care to animals.
MEMINIMUMKAN AGENCY PROBLEM DAN AGENCY COST DENGAN MENGGUNAKAN KONSEP ISLAM TENTANG PERUSAHAAN: ANTARA TEORI DAN PRAKTIK
Authors: Khoiruddin Moh , Noekent Vitradesie 
Published: June 2022

Theoritically, a company based on the principles of Islamic law (profit and loss sharing/PLS) is believed to be able to minimize agency problems and agency cost than the conventional companies,either in the aspect of the business philosophy, contract design, and control. However, the implementation of PLS is still facing a lot of obstacles, Hence, it is not surprising that models of PLS is not predominantly used by Islamic financial institutions, both in Indonesia and abroad. The cclassic argument on Â why the model is not dominant because it is considered more risky. In order to contribute to the agency problems in the Islamic perspective, this paper, firstly, will explain and explore the arguments which show advantages of Islamic concept on company in reducing agency problems and agency cost. Secondly, this paper will reveal the obstacles and problems faced in the implementation of such concept. Thirdly, this paper will offer an alternative solution framework to address various issues and constraints faced by them. Solutions offered here includes understanding aspects of the Islamic business draft, micro and macro benefits, human resources, regulatory and performance measurement indicators of Â Islamic financial institutions.
Investigation of Cellular Base Transmitter Station Power Radiation using Spectrum Analyzer
Authors: Ibrahim Muhammad Hamka , Pramono Subuh 
Published: June 2022

<p class="Abstract">The development of information and communication technology has spurred the development of the world of telecommunications. The development of telecommunications can be seen from the number of cellular service users supported by technological infrastructure in the form of BTS (Base Transmission Station). But in its development, there are social problems in the form of resistance from the community around BTS, one of the things that people worry about is the danger of radiation from BTS. This could be due to a lack of socialization and knowledge from the community. This study aims to provide education as well as quantitative evidence regarding radiation from BTS in Bulakrejo which is compared with safety standards from International Commission on Non-Ionizing Radiation Protection (ICNIRP) and Ministry of Communication and Information Indonesia. The result of investigation shows that received Power Radiation in near Base Station is safe according to regulatory standard.</p><div id="gtx-trans" style="position: absolute; left: -5px; top: -20px;"> </div><div id="simple-translate"> </div>