bluuebunny/crossref_metadata_2025 huggingface dataset:
DS-UWB and TH-UWB Energy Consumption Comparison
Authors: Elabboubi Adil , Elbahhar Fouzia , Heddebaut Marc , Hillali Yassin El
Published: April 2024

The energy consumption of the wireless communication systems is starting to be unaffordable. One way to improve the power consumption is the optimization of the communication techniques used by the communication networks and devices. In order to develop an energy efficient UWB multi-user communication system, the choice of modulation and multi access technique is important. This paper compares two Ultra-wideband multi-user techniques, i.e. the DS-UWB and the TH-UWB in the case of the Nakagami-m fading channel. For the DS-UWB technique, the orthogonal (T-OVSF, ZCD) and non-orthogonal (Kasami) codes are used. For TH-UWB, authors consider different modulations (PPM, PSM, PAM). This comparison allows choosing the best solution in terms of energy consumption, data rate and communication range. Two different studies are realized to find the most efficient technique to use. In the first study, the same number of users for the different type of codes (data rate values) is chosen and the total energy consumption for several distances and path-loss coefficient is computed. In the second one, the multiusers effects (same data rate) for various values of distances and path-loss are evaluated.
Support Vector Machine based Decoding Algorithm for BCH Codes
Authors: Sudharsan V. , Yamuna B.
Published: April 2024

Modern communication systems require robust, adaptable and high performance decoders for efficient data transmission. Support Vector Machine (SVM) is a margin based classification and regression technique. In this paper, decoding of Bose Chaudhuri Hocquenghem codes has been approached as a multi-class classification problem using SVM. In conventional decoding algorithms, the procedure for decoding is usually fixed irrespective of the SNR environment in which the transmission takes place, but SVM being a machinelearning algorithm is adaptable to the communication environment. Since the construction of SVM decoder model uses the training data set, application specific decoders can be designed by choosing the training size efficiently. With the soft margin width in SVM being controlled by an equation, which has been formulated as a quadratic programming problem, there are no local minima issues in SVM and is robust to outliers.
Cross-spectral Iris Recognition for Mobile Applications using High-quality Color Images
Authors: Trokielewicz Mateusz , Bartuzi Ewelina
Published: April 2024

With the recent shift towards mobile computing, new challenges for biometric authentication appear on the horizon. This paper provides a comprehensive study of cross-spectral iris recognition in a scenario, in which high quality color images obtained with a mobile phone are used against enrollment images collected in typical, near-infrared setups. Grayscale conversion of the color images that employs selective RGB channel choice depending on the iris coloration is shown to improve the recognition accuracy for some combinations of eye colors and matching software, when compared to using the red channel only, with equal error rates driven down to as low as 2%. The authors are not aware of any other paper focusing on cross-spectral iris recognition is a scenario with near-infrared enrollment using a professional iris recognition setup and then a mobile-based verication employing color images.
Curved-Pentagonal Planar Monopole Antenna for UHF Television Broadcast Receiving Antenna
Authors: Yuwono Rudy , Purnomowati Endah Budi , Amri Mohamad Yasir
Published: April 2024

A planar monopole antenna is an aerial, which the radiating element is perpendicular to the ground plane. It has five equal curvy sides and works at Ultra High Frequency (UHF) band of terrestrial broadcast 478–806 MHz. The curvy sides are made of five equal trimmed ellipses and separated 72o each ellipse to another, form pentagonal shape. Optimizations are obviously necessary to gain the antenna performance at the desired frequency range. The dimensions to optimize this antenna performance are the length of the sides, the offset of curvature, the antenna height from the ground plane, and the ground plane size. Optimization process is done by simulating the proposed antenna with calculated designs using Computer Simulation Technology (CST) Studio Suite 2015 software. The optimized antenna design then fabricated with a 75 W coaxial line fed, measured, and results: Voltage Standing Wave Ratio (VSWR) range of 1.05–1.28, antenna gain at 600 MHz is 15.33 dBi, elliptical polarized, and omnidirectional. With these features, this antenna should satisfy the requirements of UHF television broadcasting.
Hybrid Models for the OWA Optimization
Authors: Olender Paweł
Published: April 2024

When dealing with multicriteria problems, the aggregation of multiple outcomes plays an essential role in finding a solution, as it reflects the decision-maker's preferencerelation. The Ordered Weighted Averaging (OWA) operator provides a exible preference model that generalizes many objective functions. It also ensures the impartiality and allow to obtain equitable solutions, which is vital when the criteria represent evaluations of independent individuals. These features make the OWA operator very useful in many fields, one of which is location analysis. However, in general the OWA aggregation makes the problem nonlinear and hinder its computational complexity. Therefore, problems with the OWA operator need to be devised in an efficient way. The paper introduces new general formulations for OWA optimization and proposes for them some simple valid inequalities to improve efficiency. A hybrid structure of proposed models makes the number of binary variables problem type dependent and may reduce it signicantly. Computational results show that for certain problem types, some of which are very useful in practical applications, the hybrid models perform much better than previous general models from literature.
Focusing Operators and Tracking Moving Wideband Sources
Authors: Frikel Miloud , Safi Said , Khmou Youssef
Published: April 2024

In this paper, the localization of wideband source with an algorithm to track a moving source is investigated. To locate the wideband source, the estimation of two directions of arrival (DOA) of this source from two different arrays of sensors is used, and then, a recursive algorithm is applied to predict the moving source’s position. The DOA is estimated by coherent subspace methods, which use the focusing operators. Practical methods of the estimation of the coherent signal subspace are given and compared. Once the initial position is estimated, an algorithm of tracking the moving source is presented to predict its trajectory.
An Improved Greedy Forwarding Scheme in MANETs
Authors: Mishra Priya , Gandhi Charu , Singh Buddha
Published: April 2024

Position-based routing protocols are widely accepted efficient solution for routing in MANETs. The main feature of position-based routing protocols is to use greedy forwarding methods to route data. The greedy forwarding methods select a node, either having maximum progress towards destination (distance-based principle) or minimum deviation with line between source and destination (direction-based strategy). The first method minimizes the hopcount in a path and on the other hand, second method minimizes the spatial distance between source and destination. The distance-based routing has a great impact on the selection of reliable node and the direction based routing plays a major role to increase the stability of route towards destination. Therefore, in this paper authors propose a weighted forwarding method, which combines both the selection, schemes to select an optimal next forwarding node in a range. The simulation results show that the proposed scheme performs better than existing position-based routing protocols.
Carcinoma de vesícula biliar
Authors: Torres Segovia Stalin Fernando , Burbano Freire Juan Daniel , Aulla Colcha Jesenia Camila , Hernández Argel Omar
Published: April 2024

El cáncer de vesícula biliar es una neoplasia agresiva con alta mortalidad y variabilidad geográfica en su incidencia, influenciada por factores como la litiasis biliar, la obesidad y la infección por Helicobacter pylori. A menudo, este cáncer no muestra síntomas hasta etapas avanzadas, aunque en algunos casos puede manifestarse tempranamente con dolor abdominal, náuseas, vómitos e ictericia. Su diagnóstico tardío se debe a síntomas poco específicos, siendo el dolor abdominal el más común. El diagnóstico se dificulta en etapas tempranas, pero la ecografía abdominal es útil, especialmente en grupos de alto riesgo. La tomografía axial computarizada (TAC) y la resonancia magnética nuclear (RMN) son sensibles para detectar masas y evaluar la profundidad de la infiltración. A nivel mundial, se estima que en 2020 se diagnosticaron 115,949 casos, con unas 4,400 muertes previstas en los Estados Unidos para el mismo año. A pesar de avances en diagnóstico y tratamiento, la supervivencia sigue siendo limitada. La investigación es crucial para entender mejor la enfermedad y desarrollar terapias más efectivas. Se realizó una revisión bibliográfica exhaustiva sobre aspectos metodológicos de la investigación en cáncer de vesícula biliar, utilizando bases de datos como PubMed, Scopus y Web of Science. Se identificaron 50 estudios relevantes, mostrando una variabilidad en la metodología empleada. Resultados muestran que el cáncer de vesícula biliar es una neoplasia común, con alta incidencia en ciertas regiones como Melanesia, Asia oriental y Sudamérica, donde Chile, Bolivia y Perú tienen tasas más altas. Se asocia con factores de riesgo como género, geografía, anomalías congénitas, obesidad, antecedentes de cálculos biliares, infecciones crónicas y alteraciones genéticas. En conclusión, el cáncer de vesícula biliar presenta desafíos diagnósticos y terapéuticos significativos, con un diagnóstico frecuentemente tardío debido a la falta de síntomas específicos en etapas tempranas. La investigación metodológica es esencial para mejorar la comprensión y el manejo de esta enfermedad devastadora.
El papel de los polifenoles en la prevención del envejecimiento cutáneo
Authors: Ceron Erazo Melissa Lisbeth , Cedeño Vivas María Janina , Pilay Chávez José Gabriel , Cuenca Saltos Ginger Darlenys
Published: April 2024

El órgano más extenso y visible del cuerpo, la piel, nos protege del medio externo y nos permite comunicarnos con él. La piel se envejece por factores extrínsecos e intrínsecos, pero la radiación ultravioleta es la principal causa de fotoenvejecimiento, que causa alteraciones clínicas y funcionales en la piel. Con base en las referencias mencionadas, el objetivo principal de este estudio consistió en examinar la literatura científica relacionada con la piel, su proceso de envejecimiento y la capacidad de los polifenoles para prevenir o mejorar el deterioro prematuro de la piel causado por el estrés oxidativo y la acumulación excesiva de radicales libres. Los resultados obtenidos a partir de la revisión bibliográfica indican que los compuestos polifenólicos, como el resveratrol, las catequinas del té verde y los flavonoides, pueden reducir y prevenir el envejecimiento cutáneo debido a su potente acción antioxidante y su efecto fotoprotector. Además, es fundamental mantener una alimentación saludable en todas las etapas de la vida para preservar la salud de la piel. Esta alimentación debe ser variada, adecuada y proporcionar los nutrientes esenciales para un óptimo estado cutáneo.
Peran Guru Sekolah Dasar Dalam Pelaksanaan Proyek Penguatan Profil Pelajar Pancasila
Authors: Badateng Erwin
Published: April 2024

Abstract, In order to achieve national education goals, one of the steps taken by the government is to implement an independent curriculum in which there is a project to strengthen the profile of Pancasila students. This paper seeks to explain the concept and technique of the teacher's role in carrying out projects to strengthen the profile of Pancasila students and to discuss further about the competencies that teachers need to have in order to realize the project to strengthen the profile of Pancasila students, especially teachers who work in elementary schools that have not yet implemented the independent curriculum. The method uses a qualitative approach. The implementation procedure carried out is to find the type of literature needed both written and unwritten then review and present it. The data collection method used in this paper is from a literature study design. From the results of the discussion, it can be concluded that the teacher's role in actualizing the project to strengthen the Pancasila student profile is very vital, because in all activities from the beginning to the end of the project, the teacher plays an important role. Teachers must also involve students, so students can experience interactive and exploratory project activities. To support project implementation, teachers must have competencies that are reviewed from various perspectives. First, teacher competence in the context of policy, competence in teaching, competence to build students' strengths. For teachers who work in schools that have not yet implemented an independent curriculum and wish to implement an independent curriculum, they can use the 6 strategies provided by the government.
Manajemen Humas Dalam Penerapan Pembelajaran Daring Selama Pandemi Covid-19 di SD Al-Bayyinah Makassar
Authors: Yulianti AP Nur Adelia , Ansar Ansar
Published: April 2024

This research aims to determine Management Public Relations in the Implementation of Online Learning During the COVID-19 Pandemic at SD Islam Al Bayyinah Makassar. Public relations management in this case is seen from planning, organizing, implementing, controlling and evaluating of public relations. The approach used is a qualitative with descriptive type of research. Data analysis in this study used the Miles and Huberman model. Checking the validity of the data using triangulation techniques. The results showed that public relations planning was carried out to determine public relations goals and strategies in carrying out online public relations based on the needs of the school public. In this case, the organizing stage is also carried out, where it is decided that homeroom teachers, subject teachers with the assistance of school administration staff are in charge of carrying out previously planned public relations activities, which include presentations of school activities carried out at the beginning of the semester, creating whatsapp groups for each class, monthly online meetings and the COVID-19 vaccination program in collaboration with Puskesmas Pampang. The media used in the implementation of public relations are cellphones and laptops, using online applications including zoom, school web, youtube, facebook, instagram and whatsapp. Control in the implementation of public relations is carried out by the head of SD Islam Al Bayyinah Makassar who directly monitors public relations activities and communicates online to the coordinator and homeroom teacher. evaluation of public relations activities is carried out online with the foundation, principal, teachers, and parents/guardians of students by presenting detailed information about online learning conducted by the school in one semester.
The Study of Social Interaction in Education and Its Influence on Sociology Learning Achievement in Students
Authors: Nurdin Ibrahim , Jumadi Jumadi , Kamaruddin Syamsu
Published: April 2024

The purpose of this study was to determine the significant effect of social interaction in education on student achievement in sociology at SMA Negeri 1 Pangkep. The method used in this research is experimental research with correlation studies. The results showed that tcountof 2.20 indicates that there is an effect of the independent variable (X) on the dependent variable (Y). When compared to ttable is 2.00 then tcount greater than ttableor 2.20>2.00 so that Ha is accepted and Ho is rejected. This means that there is a significant influence between social interaction in education on the sociology learning achievement of students in SMA Negeri 1 Pangkep
The Development of Teaching Material for Blended Learning: A Strategy to Improve Students’ Creativity and Innovation in the 21st Century
Authors: Pattaufi Pattaufi , Aswan Dedy , Hakim Abdul
Published: April 2024

The study aims to develop a blended learning design to optimize the Microteaching subject in the Educational Technology program. The development method implemented here was the Integrative Learning Design Framework (ILDF), which consists of three stages: exploration, formulation, and evaluation. We used the PEDATI model to design synchronous and asynchronous learning activities in the formulation process. The research outcome is a prototype of blended learning material for microteaching subjects integrating face-to-face and online learning. Validation by an expert in media, learning design, and material shows that it is in a good category. Besides that, the N-gain score of 0.7 indicated that the 21st-century skills students must possess include teaching creativity that can be learned through blended learning. A proper learning model supports an effective and efficient learning process. The research findings can be used to design blended learning design in the future to create a more innovative and interactive learning process.
The Effect of Online Learning Assisted by Google Classroom and Zoom Meetings on Students' Creative Thinking Ability
Authors: Badaruddin Amiruddin , Hikmawati Hikmawati , Uge Sarnely , Arisanti Wa Ode Lidya , Hamid Mauludin
Published: April 2024

The face-to-face learning process in the classroom is still found to be teacher-centered so that students are not actively involved and the impact on students' creative thinking skills is low. Meanwhile, during the COVID-19 pandemic, learning is carried out online. For this reason, it is necessary to maximize online learning in order to improve students' creative thinking ability. The purpose of this study is to analyze the effect of online learning assisted by google classroom and zoom meeting on students' creative thinking skills. This type of research is a quasi-experimental research. The research design used a pretest-posttest control group design. The results of the study show that: 1) The score of students' creative thinking ability in the experimental class with an average pretest value of 37.3 increased to 81.5 while the control class obtained an average pretest score of 33.8 increased to 72.3 which means the ability to think the creativity of the experimental class students in the natural science learning of ecosystem materials experienced a significant increase compared to the control class; 2) The results of the N-Gain Score test obtained an average value of the experimental class of 71.7 or 71.7%, which means that the use of interactive video integrated google classroom is quite effective in online learning. While the average value of the control class is 58.6 or 58.6%, which means that the use of zoom meetings is less effective in online learning. Thus, it is concluded that online learning assisted by Google Classroom integrated with interactive video has a greater effect than the zoom meeting on the creative thinking ability of the fifth grade studen
ICT Skill in Administration: Employing Electronic Achieve Application in Archive practice Course Higher Education
Authors: Suryanto Edy , Oktarina Nina , Margunani Margunani , Rusdarti Rusdarti
Published: April 2024

Today's young generation is used to learning with integrated technology (ICT). Technology-based learning (ICT) is essential in supporting the preparation of prospective pre-service teacher to be creative and innovative according to future needs. Through this paper, we investigate how the impact of using the E-Archive application is supported by a simulation of a contextual approach to archiving skills. The researcher adopted an experimental research method with two groups (experimental; control) with a posttest; to determine the impact of the proposed contextual approach using the E Archive application on archiving skills. The sample in this study consisted of 86 pre-service teacher students, divided into two experimental and control groups. The intervention is carried out in simulations using ICT applications, which have a more beneficial impact on improving student skills than conventional approaches. Data was collected through pretest and posttest, which were analyzed and processed statistically. The results of parametric statistical analysis show that students in the experimental class have superior skills compared to controls. They are more familiar with and actively involved in archival simulations and perform better using ICT with contextualized simulations. Suggestions for improving skills should be made by considering technological developments and selecting the right approach.
Development of M-Learning Media Illustrated Crossword Puzzles to Increase Learning Motivation for Middle School Students
Authors: Syafmen Wardi , Indri Silfiani
Published: April 2024

this study aims to produce M-Learning learning media illustrated with crossword puzzles assisted by Google Sites to increase student motivation in class VII SMP and describe the feasibility of the media in terms of validity, practicality, and effectiveness. This research is a development research using the ADDIE model, which includes analyze, design, development, implementation, and evaluation stages. The results showed that the quality of M-Learning learning media illustrated with crossword puzzles assisted by Google sites to increase student motivation, for the validation aspect of M-Learning was categorized as valid with a validity of 75%. For the practicality questionnaire, the teacher response questionnaire obtained 91.67% of the very practical criteria and the 9 student response questionnaire was 90.40% with very practical criteria, so M-Learning was stated to be very practical. For the aspect of effectiveness, it can be seen from the results of the study tests where all students passed or met the KKM, student response questionnaires with a percentage of 90.20% were very effective criteria. And the N-Gain value of 0.76 indicates that there is an increase in learning motivation in the high category, so that M-Learning is effective for increasing student motivation.
N-Метоксибензамидат циркония (IV) vs. N-Метоксибензамид: синтез, кристаллическая структура и фазовые превращения
Authors: Викулова Е.С. , Черемных К.П. , Виноградова А.А. , Сухих А.С. , Доровских С.И. , Ильин И.Ю. , Пищур Д.П. , Морозова Н.Б.
Published: April 2024

Синтезирован первый пример комплекса Zr(IV) с ароматическим карбоксиамидатным лигандом, Zr(mba)4 (mba = N-метоксибензамидат). Установлено его строение в растворе (1H, 13C{1H} ЯМР) и кристаллической фазе (РСА) в сравнении с исходным N-метоксибензамидом Hmba. При комплексообразовании лиганды mba- проявляют бидентатно-циклическую функцию за счет атомов кислорода. Координационный полиэдр металла – искаженная квадратная антипризма, длины связей Zr-O с карбонильной и метоксигруппой лежат в интервалах 2.08-2.09 Å и 2.29-2.33 Å соответственно. Несмотря на наличие доступных фенильных колец, в кристаллах Zr(mba)4 и Hmba отсутствуют межмолекулярные π-π-взаимодействия, а проявляются C-H…π и N-H…O контакты соответственно. По данным ДСК, Hmba не проявляет фазовых превращений от 130 K до плавления (335.0 ± 0.5 K, ∆H = 15.1 ± 0.1 кДж/моль, ∆S = 45.2 ± 0.2 Дж/(моль·K)), тогда как для Zr(mba)4 обнаружено обратимое твердофазное превращение (Tonset = 177.4 ± 0.5K, ΔH = 0.68 ± 0.20 кДж/моль, ΔS = 3.8 ± 0.1 Дж/(моль·K)). Исследование кристаллов Zr(mba)4 при 150 и 200 K показало, что этот переход не сопровождается их деформацией и, по-видимому, обусловлен поворотом фенильных групп лигандов. При этом пространственная группа изменяется от P21/c до P21/n, один из параметров ячейки возрастает в 3 раза.
On the extension of singular linear infinite-dimensional Hamiltonian flows
Authors: Glazatov V. A. , Sakbaev V. Z.
Published: April 2024

We study the phenomenon of phase trajectories of a Hamiltonian system going to infinity in a finite time, the phase space of which is a separable Hilbert space. It is shown that if the Hamiltonian is a densely defined quadratic form on the phase space, which is not majorized either from below or from above by the quadratic form of the Hilbert norm, then the phase trajectories allow going to infinity in a finite time. To describe the phase flow of such Hamiltonian systems, an extended phase space is introduced, which is a locally convex space to which the Hamiltonian function, trajectories of the Hamiltonian system, and the symplectic form defined on the original Hilbert space can be extended. Flowinvariant measures on extended space are also studied. The properties of the Koopman unitary representation of the extended phase flow in the Hilbert space of functions that are quadratically integrable with respect to an invariant measure are investigated.
Reliable Physics Demand Revision of the IPCC Global Warming Potentials
Authors: Lightfoot H. Douglas , Ratzer Gerald
Published: April 2024

The Global Warming Potentials (GWP) of the Intergovernmental Panel on Climate Change (IPCC) in Table 2.14 of the Fourth Assessment Report (AR4) show the increase in warming by methane (CH4) and nitrous oxide (N2O) is 21 and 310 times respectively that of CO2. There has been wide acceptance of these values since publishing in 2007. Nevertheless, they are inaccurate. This study uses accurate methods to calculate the impacts of CO2, CH4, and N2O on the warming of the atmosphere. For example, this quantitative analysis from reliable physics shows the contribution of CO2 to warming at Amsterdam is 0.0083oC out of a difference of 26oC. The warming effect of CH4 on the Earth’s atmosphere is 0.408% of that of CO2, and the warming by N2O is 0.085% of that of CO2. Thus, the warming effects of CO2, CH4, and N2O are too small to measure. The invalidity of the methane and nitrous oxide values indicates the GWPs of the remaining approximately sixty chemicals in the Table 2.14 list are also invalid. A recommendation is that the IPCC consider revising or retracting the GWP values in Table 2.14.
Auditor Behavior of Industry Specialists Who Audit Clients in Industries that Require Specialization
Authors:   Korea Accounting Information Association, Yun Yongsuk
Published: April 2024

[Purpose] This study aims to examine the behavior of industry specialist auditors according to industry characteristics. Specifically, this study aims to provide evidence on the audit efficiency of industry specialist auditors by analyzing whether the audit hours and audit fees of industry specialist auditors are differentiated for industries requiring industry specialization designated by the Financial Supervisory Service.
[Methodology] We used a sample of 19,115 firms and years for Korean listed companies from 2008 to 2020. For the industries requiring specialization, we used the industry groups selected by the Financial Supervisory Service in November 2023 based on the opinions of listed companies and accounting firms.
[Findings] The results show that, first, industry specialist auditors are associated with higher audit fees and more audit hours on average, but these fees and audit hours are significantly lower for industries designated as requiring industry specialty, which can be interpreted as an audit efficiency. Second, the above association does not appear in the analysis using hourly audit fees, explaining the process by which efficiency gains are passed on to client firms. Third, the relations does not appear in analyses of audit quality measured by the absolute value of performance－matched discretionary accruals, providing further evidence of the efficiency with which audit quality is maintained at lower levels of audit time. These results can be interpreted as indicating that industry specialist auditors perform the audit process efficiently in industries where specialization is essential, and that the benefits of reduced audit efforts are fully passed on to the clients through this efficient audit process.
[Implications] The contribution of this study is that it provides evidence on the audit efficiency of industry specialist auditors through data that directly manifests the need for specialization while reflecting the perspectives of both audited companies as consumers and accounting firms as suppliers of industry specialization.
Accounting Conservatism in Borrowers’ Financial Reporting and Earnings Management
Authors:   Korea Accounting Information Association, Choi Wooseok , Baik Inyoung , Lee Eunsuh , Maria A. Leach－López
Published: April 2024

[Purpose] This study examines the association between conservatism in borrowers’ financial reporting and their earnings management behavior.
[Methodology] Based on non－financial companies listed on KOSPI and KOSDAQ for the fiscal years from 2012 to 2021, we find the effect of bank loans on conservatism in borrowers’ financial reporting and their earnings management. We calculate earnings management by using the absolute value of discretionary accruals from the modified Jones model (Dechow et al. 1995) and the absolute value of discretionary accruals from the performance－matched discretionary accrual model (Kothari et al. 2005). We measure the value of firm－year accounting conservatism from Khan and Watts’ (2009) conservatism scores.
[Findings] We find that earnings management behavior of a borrowing firm decreases as the firm’s accounting conservatism increases.
[Implications] The results of this study indicate that firms’ accounting conservatism in financial reporting plays an effective role in constraining their earnings management behavior. In addition, results imply that conservatism in financial reporting has an incremental contribution to the governance role of banks in constraining borrowing firms’ opportunistic reporting behavior. Overall, the findings of this study demonstrate that accounting conservatism plays a complementary role to a bank’s monitoring function.
A VIOLÊNCIA AUTOPROVOCADA EM ADULTOS ENTRE 20 A 29 ANOS E COM ENSINO SUPERIOR INCOMPLETO
Authors: Cilento Junior Oldinei Guimarães , Farias Matheus Henrique Barboza de , Landim Gabriela Segura , Saturnino Nádia Silviely Benites , Grigoletto Thiago
Published: April 2024

Introdução: A violência, segundo a Organização Mundial da Saúde (2019), é definida como o uso do poder, seja físico, emocional ou de ameaça exercido contra uma pessoa ou a si próprio com a possibilida
Analisis Penerapan Kurikulum Merdeka Belajar Disekolah Penggerak Di Lombok Timur
Authors: Aini Qurratul
Published: April 2024

Kurikulum Merdeka Belajar (The independent Learning Curriculum) has been implemented at SMAN 1 Lenek, SMAN 1 Pringgasela, and SMAN 1 Masbagik, although this is not without the existing problems. The implementation is still being carried out in stages for SMAN 1 Lenek and SMAN 1 Pringgasela, only for tenth and eleventh grades. Meanwhile SMAN 1 Masbagik has implemented it for all classed this year, the implementation of which is not free as well from problems in terms of planning, implementation and assesment. Therefore, this researchaims to (1) To find out the implementation of the Kurikulum Merdeka Belajar in driving schools in East Lombok; (2) To find out the problems of teachers in implementing Kurikulum Merdeka Belajar in schools with penggerak concept in East Lombok; (3) To find out the efforts made bay teachers to overcom problems in imlementing the Kurikulum Merdeka Belajar in East Lombok. Methodes: qualitative research with a deskripstive type. Research subjects were the principal, deputy head of curriculum, tenth grade teachers, and tenth grade students. Results: First, at SMAN 1 Lenek, SMAN 1 Pringgasela and SMAN 1 Masbagik schools had implemented the Kurikulum Merdeka Belajar with project-based implementation, diagnostic assesments, formative assesments, and summative assesments, ATP and Teaching Modules, CP, TP. Second, teacher problems in implementing the Kurikulum Merdeka Belajar were focused in plenning, implementing and assesing learning with the difficulty of creating teaching modules, the difficulty of implementing the learning goal flow, the teachers lack of ability to use tecnology, the limited number of student textbooks, the teachers ability to allocate time during learning, teachers have difficulity giving grades to students who rarely come in. Third, the efforts made by teachers to overcome existing problems were holding meetings with the
Eccrine Spiradenoma
Authors: Z. TAZI  , E. NGALANDE  , F-Z FDILI  , S. JAYI  , H. CHAARA  , M.Y. MELHOUF
Published: April 2024

First described in 1956, spiradenomas are benign tumors that arise from the bulge of the hair follicle rather than the sweat gland. Epidemiologically, spiradenomas are rare, malignant ones are even rarer, with only around 120 documented cases worldwide. No racial association or sexual predilection for spiradenomas has been reported. Most spiradenomas occur between the ages of 15 and 35. As for malignant spiradenomas, they tend to develop after the age of 50, with a median age of 60 years. Clinically, they are generally skin-colored nodules approximately 1 cm in diameter with a soft consistency, located on the scalp, neck, upper part of the trunk, breasts and rarely the armpits and vulva. While malignant spiradenomas tend to have slightly different characteristics from benign spiradenomas which can metastasize with an estimated rate of 19%. We report the case of a 45-year-old primiparous patient who had been postmenopausal for 5 years and had a maternal aunt who died of breast cancer who consulted for the discovery on self-palpation of a subcutaneous nodule near the left axillary area. The breast examination is unremarkable on D cup breasts with palpation of a subcutaneous nodule measuring 2.5 x 1.5 cm near the left axillary area. Echo mammography finds tissue and cystic lesions of the left breast classified ACR3 and a left axillary subcutaneous lesion measuring 24x13mm that is difficult to characterize. After biopsy of this lesion, the histological and immunohistochemical appearance returned in favor of a cutaneous adnexal tumor compatible with an ECCRINE SPIRADENOMA The extension assessment made by Thoracal abdomino pelvic CT had revealed non-specific pulmonary micronodules to be monitored The patient was sent to multidisciplinary team discussion with the decision to perform a left lumpectomy of the axillary lesion. The management of malignant spiradenomas is multidisciplinary with a surgeon, an oncologist and possibly a radiation oncologist.
Results of treatment of patients with post-burn strictures of the esophagus by the booging method
Authors: Sukovatkin S. I. , Sulimanov R. A. , Suzdaltsev S. E. , Korotkov I. V. , Kalyuzhnaya O. Yu. , Gasainiev T. M.
Published: April 2024

To date, treatment of cicatricial post-burn strictures of the esophagus remains one of the main challenges of thoracic surgery. Despite the signifi cant number of diff erent treatment methods, the number of patients requiring it,  does not decrease. Conservative methods are mostly ineff ective. Bougienage of the esophagus remains the main method of treating scar strictures after burns.
Study of the initial vasculotoxic risk in patients with lymphoproliferative diseases before the start of polychemotherapy
Authors: Karimov R. R. , Salakheeva E. Yu. , Budanova D.  A. , Antyufeeva O. N. , Bochkarnikova O. V. , Privalova E. V. , Belenkov Yu. N. , Ilgisonis I. S.
Published: April 2024

Research objective. To evaluate the levels of CRP, cardio-specific markers, lipids, structural-functional (SF) state of vessels, and their interrelations in patients with lymphoproliterative diseases (LPD) before polychemotherapy (PCT).

Materials and methods. The study included patients with newly diagnosed LPD (n = 30), including 16 men (53.3%) and 14 women (46.7%). All patients were divided into two groups: group 1 (n = 15) — patients with low/intermediate cardiovascular toxicity (CVT) risk; group 2 (n = 15) — patients with high/very high CVT risk. CVT risk stratification was performed with the use of specialized scales according to the current European clinical guidelines for cardio-oncology 2022. All patients included in the study underwent standard laboratory and instrumental examinations. Specific laboratory research involved assessing the levels of C-reactive protein (CRP), troponin I (TnI), N-terminal pro-brain natriuretic peptide (NT-proBNP), and lipid profile. The SF state of vessels was evaluated non-invasively using photoplethysmography (PPG) (Angioscan-01 device, Russia) and computerized videocapillaroscopy (CVC) of the periungual area (Capillaroscan-01 device, Russia).

Results. According to the results of PPG and CVC, the occlusion index (OI) in group 2 was significantly lower and amounted to 1.2 [1; 1.3] compared to 1.7 [1.45; 2.1] in group 1 (p < 0.001); capillary density after reactive hyperemia (CDRH) was also significantly lower in group 2 compared to group 1 — 43 [35.5; 45] and 54 [43; 58] cap/mm², respectively (p = 0.033). According to the obtained results, there were no statistically significant diff erences in the levels of CRP, TnI, and NT-proBNP between patients in both groups; the indicators were within the reference values. A moderate inverse statistically signifi cant correlation was found between the level of CRP and the percentage of perfused capillaries (PPC) (rs = –0.545; p =  0.02) and the percentage of capillary recovery (PCR) (r = –0.446; p = 0.013).

Conclusion. Patients with LPD have endothelial dysfunction before PCT, primarily due to the presence of cardiovascular risk factors (age, body mass index), and concomitant cardiovascular diseases. At the same time, the SF state of vessels initially does not depend on the stage and course of LPD, lipid levels, and TnI.
AL-amyloidosis after coronavirus infection with acute atypical heart injury
Authors: Lutokhina Yu. A. , Blagova O. V. , Ainetdinova D.  Kh. , Sarkisova N.  D. , Kogan E. A. , Rameev V. V.
Published: April 2024

The emergence of effective therapy for AL amyloidosis with cardiac involvement raises the challenge of a comprehensive assessment of the risk of SCD and its prevention. This problem should be approached individually and the possibility of ICD implantation should be considered in patients with ventricular arrhythmias: frequent extrasystoles and unstable ventricular tachycardia. With the development of rhythm and conduction disturbances in patients with amyloidosis, one should keep in mind the possibility of myocarditis, and in patients who have suffered a new coronavirus infection, its possible role in the induction of both post-Covid myocarditis and amyloidosis itself.
Evaluation of the biological effect of medical devices: general requirements for biological safety (analytical review)
Authors:   Autonomous non-profit organization “Institute of Biomedical Research and Technology”, Sevastianov V. I. , Perova N. V. ,   Autonomous non-profit organization “Institute of Biomedical Research and Technology”, Arzumanyants E. V. ,   Autonomous non-profit organization “Institute of Biomedical Research and Technology”, Perova N. M. ,   Autonomous non-profit organization “Institute of Biomedical Research and Technology”, Kaminskaya N. V. ,   Autonomous non-profit organization “Institute of Biomedical Research and Technology”, Dovzhik I. A. ,   Autonomous non-profit organization “Institute of Biomedical Research and Technology”
Published: April 2024

The main goal of the article is to familiarize specialists working in the field of medical devices (MD) with existing approaches to the study of their biocompatibility, set out in the standards of the GOST ISO 10993 series. The concept of the GOST ISO 10993 series of standards is to establish the biological safety and functional effectiveness of MD in the terms of biological risk, as necessary and sufficient conditions for biocompatibility of MD in the clinical application. The main attention in the general scheme of assessing the biological safety of MD is paid to the program of toxicological studies (tests), consisting of a set of methods that take into account the category, purpose and duration of MD functioning.
Brushite boron cement with antibacterial properties
Authors:   Baikov Institute of Metallurgy and Material Science RAS, Fadeeva I. V. , Fuzailova Shachnoza ,   Moscow State University Materials Science Department, Dudenkov I. V. ,   Baikov Institute of Metallurgy and Material Science RAS, Slukin P. V. ,   Federal Budgetary Institution of Science State Scientific Center of Applied Microbiology and Biotechnology, Andreeva N. A. ,   Baikov Institute of Metallurgy and Material Science RAS, Knot’ko A. V. ,   Moscow State University Materials Science Department, Deyneko D. V. ,   Moscow State University Chemical Department
Published: April 2024

Boron-containing brushite cements (B-BC) for bone grafting based on B-substituted β-tricalcium phosphate (B-TCP) have been developed. The phase composition and microstructure of B-BC have been studied. It is shown that the crystalline phase of brushite is formed as a result of hardening of cements. The behavior of B-BC in physiological solution containing TRIS-buffer was studied. The strength of B-BC under compression 5 days after mixing is 22.5 ± 1 MPa. Studies of antibacterial activity against gram-negative strain E. coli ATCC25922 and gram-positive strain S. aureus ATCC25923 showed that boron containing brushite cement exhibits antibacterial activity against both strains, causing a decrease in the number of CFU after 3 h of incubation. In vitro studies of the developed B-BC were carried out, it was shown that the developed cements based on TCP and B-TCP are biocompatible and promising for use in bone tissue surgery.
Synthesis and copolymerization of benzamide methacrylate with styrene
Authors:   Institute of Polymer Materials of the Ministry of Science and Education of the Republic of Azerbaijan, Guliyev K. G. , Vakhabova V. E. ,   Institute of Polymer Materials of the Ministry of Science and Education of the Republic of Azerbaijan, Nurullayeva D. R. ,   Institute of Polymer Materials of the Ministry of Science and Education of the Republic of Azerbaijan
Published: April 2024

It has been synthesized a new monomer — benzamide methacrylate and its free radical copolymerization with styrene in mass and solution in benzene in the presence of diazoisobutyric acid AIBN) has been carried out and investigated. The ratio of comonomers was changed in the range of 90:10 – 10:90 mol. %. The total concentration of comonomers is 1.7 mol/l at temperature 70 °C. The composition of the synthesized copolymers was determined by the method of elemental analysis on nitrogen content. The monomer and copolymer have been characterized by spectroscopic methods (IR and NMR). The relative activity constant values of the monomer have been determined and Q – e parameters according to Alfrey – Price have been calculated. For estimation of the nature of the links distribution in the macromolecular chain, the microstructure parameters have been calculated. It has been revealed that in all cases r1 > r2, therefore the copolymer is enriched with benzamide methacrylate links. It has been found that the composition of the formed copolymers depends on the composition of the initial monomer mixture. It has been established that the obtained copolymer has a sufficiently high medical-biological activity, which opens up the possibility of using it as bactericides and fungicides. It has been shown that the copolymers obtained on the basis of benzamide methacrylate are non-toxic and can be used as bactericidal preparations. It has been revealed that the biocidal effect has been primarily connected with the availability of benzamide fragment links in the macro-chain.
Influence of plastic deformation technology on mechanical properties of composites based on PTFE
Authors:   Institute of problems of oil and gas, Siberian branch, Russian academy of sciences Siberian Branch of RAS, Petrova P. N. , Markova M. A. ,   Institute of problems of oil and gas, Siberian branch, Russian academy of sciences Siberian Branch of RAS
Published: April 2024

This paper presents the results of research on the development of technology for plastic deformation of polymer blanks based on polytetrafluoroethylene (PTFE) and carbon fibers of the UVIS-AK-P brand in order to increase their strength and creep resistance. The dependence of the physico-mechanical, tribotechnical characteristics and structure formation of the obtained composites on the production technology is investigated. It is established that the composites obtained using various schemes of plastic deformation of polymer blanks differ in the nature of deformation under tension, structure formation and the nature of wear of the samples. It is shown that the use of a multidirectional scheme of plastic deformation of workpieces based on PTFE makes it possible to obtain isotropic polymer materials with improved strength properties and increased resistance to deformation under load.
The Alignment between The Official Physical Education Curriculum and The Taught Curriculum
Authors: Eren Gonca , Yalız Solmaz Dilek , Kürüm Yapıcıoğlu Dilruba
Published: April 2024

Although the written physical education curriculum is the same throughout the country, the implementation phase in schools differs from each other. Hence the purpose of this study is to examine the implementation process of the 5th-grades physical education and sports curriculum (updated in 2018) in different school contexts. Case study pattern was used. The participants of the study are two physical education teachers in Eskisehir. The data collection process consisting of observations, interviews, and field notes was completed in the fall semester of the 2018-2019 academic year. As a result of the analysis, the implementation process of the curriculum sub-theme which is related to the main theme of "taught curriculum", were reached. In conclusion, it can be said that the implementation process in schools is mostly teacher-centered, including the teaching of sports techniques and evaluating the psychomotor domain. The game-based and student-centered structure of the updated program could not be implemented by the teachers in the study. Also, it can be stated that the sufficiency of physical education course materials and the suitability of the areas used in physical education lessons are important factors in the implementation process of the curriculum.
The Effect of STEM-Based Robotic Coding Education on Primary School Students’ Decision-Making Skills
Authors: Meral Meryem , Altun Yalçın Sema , Çakır Zehra , Samur Esila
Published: April 2024

This study aimed to determine the effectiveness of STEM-based robotic coding education for primary schoolers in terms of their decision-making skills. Mixed method was preferred in the research. Pretest-posttest control group designs were used in the quantitative phase, and the case study was used in the qualitative phase of the research. The study sample consisted of 65 third graders. Pre-testing of experimental and control group students was performed using the decision-making skill scale. STEM-based robotic coding training was given to the experimental group for 6 weeks. Afterwards, the decision-making skill scale was applied as a post-test to both the experimental and control group. Quantitative data were analyzed with the paired and independent samples t-test. A statistically significant increase was observed in the experimental group students’ decision-making skills in favor of the post-test. There was no significant difference between the pre-and post-test scores of the control group students. An interview with 15 experimental group students was conducted in order to collect qualitative data, and the interview results were analyzed using the content analysis technique. According to the qualitative findings, robotic coding education positively affected the students’ decision-making, problem-solving, and willingness to share ideas. Suggestions were made based on the results.