bluuebunny/crossref_metadata_2025_split huggingface dataset:
Students’ Intuition in Solving Mathematics Problems: The Case of High Mathematics Ability and Gender Differences
Authors: Nazariah Nazariah , Authary Nailul 
Published: January 2022

Students are required to find their appropriate strategies to solve mathematics problems so that intuition is needed. Male and female students have different intuition on mathematical problem-solving. Thus, gender is influencing how to obtain mathematical knowledge. This descriptive qualitative study aimed to analize the intuition differences of male and female students who have high-level mathematical abilities at secondary school in solving mathematics problems. Data was collected through tests of mathematical problem-solving and interviews then analysed through data reduction, data presentation, and conclusion. This study found that: (1) There are differences in the characteristics of male and female intuition in mathematical problems solving, (2) The intuition of male and female in mathematical problems solving based on Polya's steps is different in re-checking the answers, (3) There are differences in intuition when students solve linear equation system problems. There are differences in intuition between male and female students with high matematical abilities in each material. Students with problem-solving abilities have affirmative intuition to understand problems, anticipatory intuition for problem-solving plans and solutions, and conclusive intuition to re-examine problems.
Ampelographic presentation of some indigenous grape varieties of Greece
Authors: Папаконстантину Л.Д. , Пасхалидис Х.Д. , Сотиропулос С.С. , Таскос Д.Г. , Пасхалидис Д.Х. , Чамурлиев Г.О. 
Published: January 2022

Технические сорта винограда Греции представляют собой сокровище для ценителей вина во всем мире из-за своей уникальности. Здесь возделываются сотни сортов для производства вин любого типа, на любой вкус, что дает возможность рассматривать страну как одного из самых «разноплановых» производителей вина, а греческие виноградники - одними из самых богатых на сортовое разнообразие в мире. В статье представлено ампелографическое описание некоторых широко известных греческих технических сортов винограда.
Greek indigenous wine grape varieties are treasure for wine lovers around the world because of the diversity and uniqueness of Greek wines. There are hundreds of indigenous wine varieties in Greece, making the country one of the most "diverse" wine producers, and Greek vineyard - one of the richest in the world. The local wine varieties of Greece are an irresistible arsenal for wine production of every type and style, to suit any taste. The paper presents the ampelographic description of some well-known local wine varieties of Greek growing regions.
Modification of the RLA model for presenting a cluster system of a composite material with a fractal filler structure
Authors: Belko A. V. , Babarika N. N. , Zeylikovich I. S. , Nikitin A. V. 
Published: January 2022

The paper proposes a modification of the diffusion-limited aggregation model to study the properties of a cluster system. A computational experiment to determine the mutual influence of the sticking probability and the volume concentration of particles on the formation of fractal clusters in a cluster system was carried out in accordance with the second-order orthogonal central compositional plan (OCCP). As a result of a computational experiment in accordance with the OCCP, an equation was obtained for the dependence of the mass fractal dimension of clusters on the volume of particle concentration and the probability of adhesion of diffusing particles and cluster particles in the adhesion zone. This dependence was obtained in a range of volume concentration of particles from 2 to 5 % and the probability of adhesion of diffusing particles and particles of clusters in the adhesion zone from 0.2 to 1.
First-principles study of stability and electronic properties of single-element 2D materials
Authors: Hvazdouski D. C. 
Published: January 2022

We have estimated stability of single-element 2D materials (C2, N2, Si2, P2, Ge2, As2, Sn2, Sb2, Pb2, and Bi2) by ab initio calculations. The calculations of structural and mechanical properties of 2D materials were performed using the VASP software package. The results of calculations of stiffness tensors, Young's modulus, and Poisson's ratios show that all studied single-element 2D materials are mechanically stable. Dynamic stability was investigated by calculating the phonon dispersion of the materials using the finite displacement method. Only Pb2 has imaginary modes in the phonon dispersion curves and therefore it has dynamic unstable structure at low temperatures. The analysis of the band structures indicates the presence of insulators (N2), semiconductors (P2, As2, Bi2, Sb2), semimetals, and metals among the studied group of single-element 2D materials.
Research of the Possibilities of Matching the Multi-element Receiving-Transmitting Irradiator Aperture
Authors: Rusov Yu. S. , Krapivina S. S. 
Published: January 2022

Currently, aperture antennas with spatial excitation, such as reflector antennas and phased array antennas, are widely used in radar. The composition of such an antenna includes an irradiator, which can be made in the form of a small-element array of radiators to form a set of necessary radiation patterns. Monopulse irradiators are often used, which form both total and difference directional patterns. When performing an irradiator based on waveguide parts, radiators in the form of horns or open ends of waveguides are installed in its aperture. Waveguide irradiators with four and twelve horns are widely used. One of the main electrical characteristics of such an irradiator when used as part of a receiving-transmitting antenna is the isolation of the transmitting and receiving paths. Matching the aperture of the transmitting and receiving irradiator has a significant effect on the isolation of its waveguide channels. With small transverse dimensions of the radiators in the form of open ends of waveguides, it is not possible to obtain high isolation of waveguide channels without the use of additional matching elements. The task of research the effect of matching the aperture of a waveguide multi-element irradiator on the isolation of its transmitting and receiving channels, as well as the ways of matching its radiators, is set.The article considers a four-horn irradiator, the aperture of which contains radiators in the form of open ends of a square waveguide. Each radiator has the radius rounding required for the manufacture of the product using the available technological processes. To match the emitter, a dielectric plate is installed inside it. During the research the thickness of the plate and its location relative to the aperture plane changed. The characteristics of matching the radiators with a plate made of teflon, polyethylene and ST-4 material based on polymers filled with titanium dioxide are presented.The proposed method of matching the opening of a multi-element irradiator with a transverse emitter size of 0,68λ (λ is the wavelength in free space corresponding to the average frequency of the operating band) makes it possible to improve the isolation of the receiving and transmitting waveguide channels by at least 4 dB in the frequency band of up to 3%.
Investigation of Aerosol Inhomogeneities Parameters in Planetary Boundary Layer in UV-A Spectral Region
Authors: Filimonov P. A. , Ivanov S. E. , Gorodnichev V. A. , Belov M. L. , Fedotov Yu. V. 
Published: January 2022

For today necessity of atmosphere wind remote sensing for wide pool of applications require development of new measurement methods and improvement of already existing.Currently doppler methods for wind speed measuring have largest sensing range. Correlation-based methods are provide lower sensing range for wind speed measurement. However, doppler-based lidar are expensive in opposite to simply designed correlation lidars that additionally allows to measure wind profile along sensing direction.Development of wind correlation lidars required knowledge of atmosphere aerosol inhomogeneities parameters.The most experimental research till now in this area are related to visible spectral range.One of the perspective eye-safety spectral range for wind lidar is UV spectral region. There not so much experimental research works of aerosol inhomogeneities parameters in UV.This paper is related to field experiments of aerosol inhomogeneities parameters in planetary boundary layer on 0.355 um operating wavelength.Block diagram and parameters of lidar with 0.355 operating wavelength is shown. Process of experiments is described. Typical atmosphere backscattering echo-signal for single laser pulse is demonstrated.Procedures if lidar signals processing are described, example of two-dimensional field of relative fluctuations of volume backscattering coefficient for different atmosphere conditions is shown.Results of measurement data processing shown that in planetary boundary layer average contrast of aerosol inhomogeneities in most cases has values in range 0,4% – 10 % (in case of snow up to 25%), and size in range 1,5 – 20 m. Dependency of observation number of aerosol inhomogeneities by range z from lidar to backscattering volume is descending with 1/z manner that the same for dependency for signal-noise ratio SNR(z).
Odd Mathieu Functions Application to Synthesize a Multi-element Radiator Flat-topped Radiation Pattern
Authors: Rusov Yu. S. , Propastin A. A. 
Published: January 2022

The paper studies synthesizing capabilities of a flat-topped radiation pattern when using the expansion of the target radiation pattern into a series in terms of odd Mathieu functions. As parameters for comparing the target and synthesized radiation patterns, we used a main-lobe width at a level of -1 dB and an irregularity of the top of the main-lobe of the radiation pattern. The sector-shaped radiation pattern has been synthesized for linear radiators of various lengths. The convergence of the coefficients of the Mathieu series in the synthesis of the sector-shaped radiation pattern has been estimated. It is shown that the use of piecewise-linear approximation of the target radiation pattern in the synthesis using a series expansion into odd Mathieu functions allows us to improve the quality of the radiation pattern formed.The task that involved finding the amplitude-phase distribution for a linear emitter with a length of 3λ, 4λ and 5λ (λ is operation wavelength) for a target radiation pattern was solved. The target amplitude distribution has the following electrical characteristics: the main-lobe width is 37.5° at a level of -1 dB and the side lobe level (SLL) is -20 dB. The synthesis procedure was performed for two cases. In the first case, the target radiation pattern is represented by a piecewise constant function with a given width. In the second case, the target pattern was specified using piecewise linear approximation of the top and slopes of the main lobe.Comparison of the radiation patterns obtained shows that in the first case, the main-lobe width of the radiation pattern at a level of -1 dB is 34°, the SLL varies from -15.6 to -17 dB, and the irregularity of the main-lobe top of the radiation pattern lies within 0.9 ... 1.2 dB. In the second case, the main-lobe width of the antenna radiation pattern at a level of -1 dB is 36.5°, the SLL is -17.5 dB, and the irregularity of the main-lobe top is 0.4 dB at most. When used, the considered under consideration enables us to obtain both the synthesized patterns for linear radiators of various lengths, and the corresponding amplitude-phase distributions and coefficients of the Mathieu series. An estimate of the convergence of the Mathieu series shows that the use of linear approximation of the target radiation pattern in some cases allows up to 2.7-fold increase in acceleration of the convergence of the Mathieu series. The accuracy of reproducing the sector-shaped pattern by the synthesis method using the expansion into odd Mathieu functions gives good results when synthesizing the amplitude-phase distribution for the linear radiators with an electric length of 5λ or more.
Mathematical Modeling Methods in Designing Onboard Laser-Ranging Systems of Spacecraft
Authors: Starovoitov E. I. , Savchuk D. V. 
Published: January 2022

To perform rendezvous and docking of spacecraft (SC), it is necessary to detect and measure the coordinates of a passive space vehicle (SV) using the onboard aids of an active SV. For this purpose, in addition to radio engineering systems, laser-ranging systems (LRS) are used. A designing process of the onboard LRS for promising spacecraft is currently becoming more complicated and requires taking into account a lot of factors.The authors have developed the PC software to assess capabilities of onboard pulse LRS of spacecraft when working on the nearby or distant space objects that have a diffusely scattering surface, as well as are equipped with the corner reflectors. The software also allows us to calculate the LRS parameters, which, according to GOST R 50723-94, ensure eye-safety in the spectral range of 0.81 ... 1.5 microns in case of accidental irradiation.The energy of the intensifier pulse and the divergence of a sensing beam determine the LRS range and the distance of eye-safe observation, which are the most important indicators to characterize the onboard LRS capabilities. To ensure the best LRS range and safety characteristics simultaneously, it is necessary to solve the problem of multi-criteria optimization.The paper solves the problem of multi-criteria optimization for the maximum LRS range and the eye-safe observation distance by Pareto sets the use of which allows us to avoid uncertainty in choosing a significance of criteria.The results obtained show that the proposed methods can be successfully applied in designing onboard LRS of spacecraft.
MASALAH YANG DIHADAPI SISWA SEKOLAH MENEGAH ATAS DALAM PEMBELAJARAN ONLINE
Authors: Indriawati Prita 
Published: January 2022

Menjadi keharusan bagi guru dan siswa untuk dapat mengakses dan menggunakan media berbasis teknologi dalam pembelajaran online pada saat ini. Dalam artikel ini akan dikaji tentang masalah yang dihadapi siswa Sekolah Menengah Atas (SMA) di Balikpapan dalam pembelajaran online. Metode penelitian dalam artikel ini yakni deskriptif kualitatif. Pengumpulan data diperoleh wawancara dengan kepala sekolah, guru dan siswa serta penyebaran angket melalui google form kepada siswa berjumlah 30. Hasil dari penelitian ini ditemukan empat masalah utama yaitu terbatasnya pemahaman penggunaan aplikasi terbatasnya alat pembelajaran, terbatasnya jaringan, terbatasnya penggunaan kuota. Alternatif solusi dari hambatan diatas yakni pelatihan secara intensif terkait penggunaan teknologi pembelajaran, peningkatan akses jaringan secara menyeluruh dari pemangku kepentingan, sekolah menyeragamkan penggunaan teknologi yang digunakan pembelajaran online serta pembuatan dan penggunaan e learning dari sekolah. Adanya penelitian ini diharapkan, dapat menjadi bahan evaluasi bagi berbagai pihak untuk terus meningkatkan kualitas pembelajaran online agar lebih efektif.
ANALISIS PENINGKATAN NILAI EKONOMI IKAN LAUT MENJADI OLAHAN NUGET
Authors: Herry Nur Faisal  
Published: January 2022

ABSTRAK
Penelitian ini memiliki tujuan menentukan peningkatan harga produksi ikan laut menjadi nugget olahan sehingga mendapatkan harga yang lebih baik. Kajian dilakukan di kawasan pesisir Pantai Sine, Desa Kalibatur, Kecamatan Kalidawir, Kabupaten Tulungagung. Teknik penelitian menggunakan teknik survei, responden diperoleh dari penggunaan metode purposive sampling bagi para pelaku nelayan pengolahan hasil perikanan. Penambahan biaya olahan yang merupakan hasil akhir dari olahan ikan di Pantai Sine untuk dijadikan nugget agar lebih tahan lama dan menampilkan biaya promosi yang lebih besar. Penghasilan yang diperoleh disesuaikan dari usaha pengolahan hasil perikanan yang terkait dengan unsur teknis dan unsur non teknis. Secara teknis, tingkat ekonomi, jumlah bahan mentah dan jumlah tenaga yang digunakan akan berpengaruh pada jumlah biaya yang dibawa. Sedangkan faktor non teknis yang berpengaruh terhadap besaran pungutan yang dibawa adalah harga masuk dan harga keluaran, dalam hal ini pungutan hasil olahan perikanan.Kata kunci: ikan, nugget, biaya produksi

ABSTRACT
This study has the aim of determining the increase in the price of marine fish production into processed nuggets so that they get a better price. The study was conducted in the coastal area of ​​Sine Beach, Kalibatur Village, Kalidawir District, Tulungagung Regency. The research technique used survey techniques, respondents were obtained from the use of purposive sampling method for fisherman processing fishery products. The addition of processed costs which are the end result of processed fish at Sine Beach to be used as nuggets to make them more durable and display higher promotional costs. The compensation received is adjusted from the business of processing fishery products related to technical elements and non-technical elements. Technically, the level of economy, the amount of raw materials and the amount of labor used will affect the amount of costs carried. Meanwhile, non-technical factors that affect the amount of levies carried are the entry price and the output price, in this case the levy on processed fishery products.Keywords: fish, nuggets, production cost

Keywords: fish, nuggets, cost of product
ANALISIS PERAN KELOMPOK TANI DALAM UPAYA PENINGKATAN EKONOMI PERTANI DI ERA PANDEMI COVID-19
Authors: Mufida Diah Lestari  
Published: January 2022

ABSTRAK
Indonesia memiliki daerah pertanian yang luas, penduduk juga masih memiliki mata pencaharian sebagai petani, namun saat sekarang ini dunia pertanian mengalami nilai surut akan penghasilan yang diterima oleh para petani. Hal ini dikarenakan hasil dari pertanian tidak mendapatkan respon yang baik dari konsumen, karena harga jual di masyarakat saat sekarang mengalami penurunan nilai daya beli pada masyarakat.
Era pandemic Covid-19 menjadi salah satu faktor utama, karena dari efek kondisi pandemic saat ini sangat berpengaruh di hampir seluruh lini sektor di masyarakat. Pertanian juga menjadi salah satu sektor yang mengalami penurunan nilai pendapatannya. Biaya operasional mengalami peningkatan nilai yang cukup tinggi sehingga membuat harga jual mengalami peningkatan, tetapi karena kondisi ekonomi di era pandemi sekarang ini sangat membuat masyarakat memiliki tingkat konsumsi yang cukup rendah sehingga banyak dari hasil pertanian yang tidak dapat terjual dengan maksimal. Oleh sebab itu sekarang diperlukan kelompok yang menjadi tangan panjang dari petanisehingga dapat menampung hasil pertanian dari masyarakat petani untuk dapat didistribusikan kepada masyarakat dengan harga yang baik bagi para petani. Peran kelompok tani cukup besar diantaranya adalah kelompok dapat memberikan
Kata Kunci: kelompoktani,peningkatan ekonomi,covid-19

ABSTRACT
Indonesia has a large agricultural area, the population also still has a livelihood as farmers, but currently the agricultural world is experiencing a receding value of the income received by farmers. This is because the results of agriculture do not get a good response from consumers, because the selling price in society is currently experiencing a decrease in the value of purchasing power in the community.
The era of the Covid-19 pandemic is one of the main factors, because the effects of the current pandemic condition are very influential in almost all sectors of society. Agriculture is also one of the sectors experiencing a decline in the value of its income. Operational costs have increased in value which is high enough to make selling prices increase, but due to economic conditions in the current pandemic era, people have a fairly low level of consumption so that many agricultural products cannot be sold optimally.

Keywords: farmer groups, economic improvement, covid-19
Gerakan Literasi Islamiyah Melalui Program Taklim dan Tarbiyah di Kecamatan Tiworo Tengah Kabupaten Muna Barat
Authors: Khaerul Aqbar  , Muhammad Taufan Djafri  , Ariesman Ariesman 
Published: January 2022

The purpose of the Real Work Lecture (KKN) of STIBA Makassar Batch IV is to carry out community service as a pillar of “Tri Dharma Perguruan Tinggi”. The method of implementation of the service program begins by mapping the problems and needs of the community using SOAR Analysis. After the analysis is done, the work program is arranged according to the needs of the community. The successful work program was Taklim Qur'aniyah Virtual for Youth, Taklim Qur'aniyah Virtual for Mothers, Tarbiyah Qur'aniyah Virtual for Fathers. All these programs have shown significant initial results in accordance with the objectives of the KKN of STIBA Makassar that have been proclaimed, and will be continued by the Department of Dakwah and Cadreization of DPD Wahdah Islamiyah Muna Barat.
PERBEDAAN LATIHAN LOMPAT GAWANG BERTAHAP DAN LOMPAT GAWANG TETAP TERHADAP KEMAMPUAN LOMPAT JAUH GAYA JONGKOK PADA SISWA PUTRA USIA 11 – 12 TAHUN DI MI MUHAMMADIYAH TINGGARJAYA BANYUMAS JAWA TENGAH 2021
Authors: Marwanto Ari Sujatmiko  , Slamet Santoso  , Rima Febrianti  
Published: January 2022

Penelitian ini bertujuan untuk megetahui perbedaan latihan lompat gawang bertahap dan lompat gawang tetap terhadap kemampuan lompat jauh gaya jongkok siswa putra usia 11-12 tahun di MI Muhammadiyah Tinggarjaya Banyumas Jawa Tengah 2021. Penelitian ini merupakan penelitian kuantitatif dengan metode Eksperimen pretest-posttest. Penelitian dilaksanakan dengan tes awal (pretest) dan diberikan perlakuan (treatment) dan diakhiri dengan tes akhir (posttest), dilaksanakan untuk mengetahui perbedaan lompat gawang bertahap dan lompat gawang tetap terhadap kemampuan lompat jauh gaya jongkok. Subjek penelitian adalah siswa putra usia 11-12 tahun di MI Muhammadiyah Tinggarjaya Jawa Tengah yang berjumlah 30 orang. Teknik pengumpulan data adalah dilakukan tes pengukuran lompat jauh gaya jongkok dengan lompat jauh. Analisis data menggunakan uji prasyarat analisis data (uji normalitas dan uji homogenitas) dan uji perbedaan. Hasil penelitian menunjukkan bahwa terdapat pengaruh perbedaan hasil latihan lompat gawang bertahap dan lompat gawang tetap terhadap kemampuan lompat jauh gaya jongkok pada siswa putra usia 11 – 12 tahun di MI Muhammadiyah Tinggarjaya Banyumas Jawa Tengah 2021, karena nilai t yang diperoleh sebesar 6,076 lebih besar dari t tabel 2,048 dan angka signifikan 0,000 < 0,05 sehingga ada perbedaan signifikan nilai tingkat kemampuan lompat jauh gaya jongkok antara kedua kelompok setelah diberikan perlakuan. Hal ini menunjukkan dari hasil analisis latihan lompat gawang bertahap dan lompat gawang tetap terhadap kemampuan lompat jauh gaya jongkok mempunyai perbedaan yang signifikan. Presentase rata – rata peningkatan latihan lompat gawang bertahap lebih baik pengaruhnya dari pada lompat gawang tetap, yaitu dengan lompat gawang bertahap peningkatan sebesar 17,5% dan latihan lompat gawang tetap peningkatan sebesar 7,41%.