bluuebunny/crossref_metadata_2025 huggingface dataset:
Rancang Bangun Bagian Kerangka Mesin Penyerbuk Kunyit dan Pencacah Rosela Sebagai Bahan Dasar Jamu Herbal Kapasitas 5 Kg
Authors: Bahtiar Ahmad Doni Mutiara
Published: January 2022

Pada perencanaan mekanik pembuatan yang dilakukan pada rangka mesin menggunakan plat besi siku(L) dengan ketebalan 3mm dan penggabungan rangka menggunakan sambungan las smaw dengan menggunakan elektroda jenis E 6013. Pada perencanaan perhitungan mekanik pada rangka motor listrik didapatkan hasil gaya total yang bekerja pada rangka sebesar F= 98N. dan pada mesin penyerbuk sebesar F= 147N . dan untuk perakitan komponen mesin menggunakan sambungan baut M8 dan M10.
Analisis Kekuatan Tarik Membran Kitosan Kreco Sebagai Filtrasi Air Konsumsi Rumah Tangga
Authors: Bahtiar Ahmad Doni Mutiara
Published: January 2022

Pemanfaaatan limbah cangkang kreco yang selama ini hanya dibuang begitu saja supaya mempunyai nilai lebih yang bermanfaat untuk masyarakat. Kreco salah satu molusca yang hidup bebas di daerah persawahan. Penelitian ini mengusulkan sebuah gagasan baru menggunakan cangkah kreco sebagai membran filtrasi air kran di perumahan dan Uji Tarik erat kaitannya dengan sifat mekanik membran. Parameter ini penting karena menjadi pertimbangan dalam pemilihan membran dalam beberapa aplikasi seperti saringan air ketika mendapatkan tekanan air. . Cangkang keong sawah tersebut dicuci dengan larutan asam asetat dan disikat sampai bersih. Kemudian di giling sampai berbentuk serbuk dan mengalami berbagai macam perlakuan sampai terbentuk membran. Dari hasil penelitian didapatkan membran yang memiliki kekuatan Tarik tertinggi adalah ketebalan 6 mm.
Kompetensi Widyaiswara di Era Digital dan Media Sosial
Authors: Hasan Ashari  , Sancoko Bambang
Published: January 2022

Digital transformation is the government's main concern which represented by technology and social media-based services. This concept also adapted to civil servant development and training programs which becomes the main task for Widyaiswara. This study aims to describe the widyaiswara's competencies, appropriate digital and social media, and the collaborative patterns of training institutions in the digital era. The research is descriptive, and analyze using the literature review method. The result shows us five major competencies which are important, namely: information and data literacy, communication and collaboration, digital content creation, digital security, and technical problem-solving. The user also needs to choose the right digital and social media platform since the usage of those by training institution tend to increase efficiency and, moreover, government income sources. There are several recommendations for widyaiswara from this research, such as: the need to increase digital competency, the need of ethical code in a digital era, and the need for regulation that possible government to get revenue from social media.
Sinkronisasi Kurikulum Mata Kuliah Wajib Umum Pancasila, Kewarganegaraan, dan Agama di Perguruan Tinggi Dalam Melawan Radikalisme
Authors: Zulkarnain Zulkarnain , Basri Basri , Matang Matang , Wiranata Irawan Hadi
Published: January 2022

This paper wants to explain the efforts that lecturers should make in universities tofight and prevent the development of radicalism in universities by synchronizing thecurriculum in general compulsory subjects such as Pancasila, Citizenship, andReligious education. This research uses a descriptive qualitative method with a casestudy approach. This research was conducted at the internal quality assurance centerof the Politeknik Negeri Balikpapan in curriculum development for general coursesin fighting radicalism and the civic education lecturer team outside the PoliteknikNegeri Balikpapan. The results of the study would like to recommend curriculumsynchronization, among others: first, synchronizing the design of semester learningmaterials about radicalism in Pancasila, Citizenship, and Religious Education,secondly implementing a hidden curriculum in countering the development ofradicalist ideology, third conducting joint evaluations and research on thedevelopment of radicalism in higher education. Sustainable.
Pengembangan E-Modul Ekonomi Mata Pelajaran Ekonomi Bisnis Materi Pelaku Ekonomi Untuk Siswa Kelas X AKL 1 SMKN 2 Kediri
Authors: Kusnul Khotimah  , Irmayanti Elis , Surindra Bayu
Published: January 2022

Dalam penelitian memiliki tujuan untuk mengahasilkan e-Modul ekonomi untuk siswa kelas X AKL 1 SMKN 2 Kediri. Metode yang dipakai dalam pengembangan pada penelitian ini adalah dengan pengembangan model ADDIE melalui lima tahapan, namun pada penelitian saat ini dibatasi sampai empat tahap. Uji validasi kepada tiga validator ahli, yaitu validator ahli materi, validator ahli media, dan validator ahli bahasa. Uji validasi dalam penelitian ini dilaksanakan melalui dua tahap. Hasil uji validasi ahli materi pada tahap pertama mendapatkan nilai sebesar 80,83% dengan kriteria baik, mengalami peningkatan hasil pada tahap kedua dengan nilai 90,83% dengan kriteria sangat baik. Pada uji validasi ahli media media tahap pertama mendapatkan nilai 75% dengan kriteria cukup, dan tahap kedua meningkat dengan nilai 93,75% dengan kriteria sangat baik. Selanjutnya untuk uji validasi ahli bahasa mendapatkan nilai dengan kriteria cukup yaitu sebesar 65,63% dan meningkat pada tahap kedua sebesar 87,5% dengan kriteria baik. e-Modul yang saat ini dikembangkan dirasa cukup efektif dalam menunjang pembelajaran di kelas. Siswa bisa mengakses pada gadget masing-masing, tidak terlalu banyak menghabiskan kuota internet, disusun secara sistematis, serta disusun berdasarkan pedoman pegembangan e-Modul oleh Direktorat Pembinaan SMA.
Online Class Resitation Learning Model During the Covid-19 Pandemic to Increase Outcomes Students Learning in Class Accounting Lessons
Authors: Mamentu Meike D.
Published: January 2022

This study aims to determine the improvement of student learning outcomes through the online class recitation learning model during the covid-19 pandemic, on the learning process of class X1 students of the Accounting Department at SMK Negeri 1 Tompaso Baru Minahasa, totaling 14 students. The online classroom research method used is in the form of CAR (Classroom Action Research) which refers to classroom action research. In terms of treatment, learning is given that applies an online class recitation learning model.

From the results of the analysis obtained by researchers on accounting subjects with service company accounting cycle material with the stages: Recording transactions/documents into general journals (General Entries) and posting from general journals to general ledgers (General Ledger), there is an increase in student learning outcomes.  This increase can be seen from the percentage of student learning completeness individually and classically. This increase can be seen from the percentage of student learning completeness individually and classically. At the pre-cycle stage or before the implementation of the action, the average value of the class was 63.92 with the percentage of classical learning completeness only 35%. In the first cycle, it reached an average of 71.78 with a classical mastery level of 64.28%. While the learning outcomes in the second cycle reached an average of 77.85 with the classical learning completeness level reaching 92.85%. Likewise with student learning activities at every face-to-face online class. Student activity at the 1st meeting only reached a percentage of 56.25% with high criteria. At the second meeting it reached a percentage of 72.76% with high criteria, and at the third meeting it reached a percentage of 83.92% with very high criteria. Thus, student learning activities and student learning completeness in online classes during the COVID-19 pandemic increase by using the online class recitation learning model. With learning outcomes reaching 92.85% above the minimum learning completeness.
Statistical analysis of the distribution of phreatic eruption products in the caldera of the Golovnin volcano (Kunashir Island, Kuril Islands)
Authors:   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Kazakov A.I. , Veselov O.V. ,   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Kozlov D.N. ,   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences
Published: January 2022

The paper presents the results of statistical processing of data on the thickness and size of the tephra fragments of andesidacite composition erupted as a result of a phreatic explosion in the caldera of Golovnin volcano about 1000 years ago. A petrochemical description of the products of volcanic activity of the crustal Golovnin volcano and its evolution process is presented based on geological and geophysical data. The relationship between the thickness of the tephra, the size of its fragments, and the distance to the eruption center was studied using the polynomial regressions of varying degrees and exponential distribution. The adequacy of the constructed models to the initial data is illustrated by determination coefficients. Tephra distribution models were constructed on the basis of a three-dimensional trend analysis. For the first time, a logarithmic model was used to describe the size of tephra fragments. The accuracy of the model used was estimated. A method for estimating the potential dispersion range of tephra fragments of a certain size was obtained. The work demonstrates the potential of mathematical statistics for describing the distribution of products of volcanic eruptions of a certain type. The results of this study are suitable for creating an information database of pyroclastite distribution across the Kuril-Kamchatka volcanic region.
Mid-term earthquake prediction using the LURR method on Sakhalin Island: A summary of retrospective studies for 1997–2019 and new approaches
Authors:   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Zakupin A.S. , Boginskaya N.V. ,   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences
Published: January 2022

The work presents the results of a retrospective analysis of the seismicity of Sakhalin using the LURR method of mid-term earthquake prediction for 1997–2019. All previously performed computations are reduced to a single database of seismological data (catalogue) of the Sakhalin Branch of the Federal Research Center “United Geophysical Survey of RAS”. Similar to previous studies, the Sakhalin territory was scanned by applying computational areas in the form of circles with a radius of one degree; however, the resolution was increased. The entire territory was covered by such zones with a step of 0.5 degrees in latitude and longitude, with the grid being detailed down to 0.1 degrees in three most dangerous seismogenerating zones. As a result, the number of computational samples was increased, which allowed the omission of anomalies in the LURR parameter during computations to be avoided. Due to a reasonable binding of the lower bound of the magnitude for predicted events to the upper bound of the magnitude range of the computational sample (M = 5), the number of objects for the retrospective forecast was increased by 3 times for the study period. 323 computational samples (119 of which are basic and 204 ones are detailed) were processed on the territory of the island. 15 alarm periods were obtained, which geographically represent all zones of moderate and strong earthquake generation on Sakhalin Island. As a result, 17 out of 19 earthquakes with M ≥ 5 occurred in the areas with anomalies during the alarm periods not exceeding three years. Out of 15 periods, 4 turned to be false. Thus, 75 % of the alarms predicted 89 % of the earthquakes.
Paleo-incisions and gas zones of Pliocene-Quaternary sediments at the site of engineering and geological surveys on the shelf of Sakhalin Island
Authors:   RN-SakhalinNIPImorneft Limited Liability Company, Leksin V.K.
Published: January 2022

The engineering and geophysical studies are carried out before installation of a drilling platform and construction of engineering structures in the water areas in order to identify and map geological hazards, including the anomalous gas zones, from which involuntary release of hydrocarbons is possible, when the drill string passes through in the upper part of the geological section. The paper presents the results of expeditionary studies carried out at the site of engineering and geological surveys using continuous seismoacoustic profiling. The site is in the Sea of Okhotsk at the northeastern shelf of Sakhalin Island and adjoins Nogliksky district of the Sakhalin Region. Two seismoacoustic complexes were identified according to the data of continuous seismoacoustic profiling in the section of the study area, which differ from each other in the nature of the wave pattern. Gas zones and paleo-incisions were found in the bottom part of the section. The identified geological hazards are mapped and must be taken into account during further drilling of wells and construction of engineering structures.
State of the information and analytic database of exogenous geological processes on the territory of the Ural Federal District
Authors:   Ural Regional Center of State Mining Inspectorate of the FSBI “Hydrospetsgeology”, Elokhina S.N. , Myznikova T.S. ,   Ural Regional Center of State Mining Inspectorate of the FSBI “Hydrospetsgeology”, Khudyakov A.A. ,   Ural Regional Center of State Mining Inspectorate of the FSBI “Hydrospetsgeology”
Published: January 2022

13 genetic types of dangerous exogenous geological processes (EGP) have been developed on the territory of the Ural Federal District (UFD). This work aims to illustrate the system of accounting and accumulating information on the manifestations of dangerous EGPs of each genetic type. When conducting the state monitoring of the subsurface state (SMSS), the information about the EGP manifestations is accumulated in the structured data arrays (SDAs), which are organized for each subject of the Russian Federation within the UFD. The sources of information are the results of areal regular and one-time engineering and geological surveys, materials from official open and stock sources. On the basis of accumulated data, we have concluded that the most common genetic types of dangerous EGPs in the UFD territory are gully erosion (28.4 %) and karst-suffusion process (21.5 %), which make up about half of the total number of all recorded manifestations. The operation of the information and analytical base of the SMSS EGP allows to perform accounting, analytical (including the identification of patterns of EGP development for a selected time interval), reporting and statistical functions, increases the reliability of seasonal and annual forecasts.
The features of the reversion phenomenon after ageing in magnesium-yttrium alloy, added with samarium
Authors:   Baikov Institute of Metallurgy and Materials Science of RAS, Rokhlin L. L. , Dobatkina T. V. ,   Baikov Institute of Metallurgy and Materials Science of RAS, Tarytina I. E. ,   Baikov Institute of Metallurgy and Materials Science of RAS, Lukyanova E. A. ,   Baikov Institute of Metallurgy and Materials Science of RAS, Temralieva D. R. ,   National Scientific Research Technology University “MISiS”
Published: January 2022

It was investigated the reversion phenomenon consisting of softening after a strengthening ageing at 200 °C during from 0.5 to 128 h in a case of shortcoming annealing from 0.25 to 64 h at some higher temperature — 250 °C in the magnesium-base alloys containing the rare-earth metal — yttrium (Y), alloyed additionally by the other rare-earth metal — samarium (Sm). Both alloying elements are the rare-earth metals (REM), but belong to different groups: Y belongs to the yttrium group of REM and Sm belongs to the cerium one. It was established, that in the binary alloy of magnesium with yttrium and in the ternary alloys with the identical yttrium and diverse contents of samarium aged after the same duration for the same time the representative softening of reversion takes place indeed. As compared with the binary Mg – Y alloy and with increase of the samarium contents in the ternary Mg – Y – Sm alloys the size of the reversion increases. However, in the same case the size of the strengthening effect after ageing in the alloys increases also and it is more, than the respective reversion size.
Synthesis and characterization of upconversion nanophosphors NaYF4:Yb3+:Er3+/NaYF4
Authors:   Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Trifanova E. M. , Nikolaeva M. E. ,   Syntol Ltd., Popov V. K. ,   Institute of Photon Technologies of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences
Published: January 2022

We carried out the solvothermal synthesis of UCNPs with the core/shell structure NaYF4:Yb3+:Er3+/NaYF4 and analyzed their photoluminescent properties depending on the nanoparticle size and preparative synthesis conditions. It has been shown that intensity and lifetime of the photoluminescence of the upconversion nanophosphors depend on the intensity of laser excitation, size of the nanoparticles and presence of an inert shell. Upon the formation of an inert shell on the surface of NaYF4:Yb3+:Er3+ nanoparticles the conversion efficiency of visible and NIR radiation in different spectral regions can increase by more than an order of magnitude due to shielding of luminescent centers from nonradiative losses at surface defects.
Poisson ratio of TiNi
Authors:   Federal State Budgetary Educational Institution of the Higher Education “A.I. Yevdokimov Moscow State University of Medicine and Dentistry” of the Ministry of Healthcare of the RF, Muslov S. A. , Lotkov A. I. ,   Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Timkin V. N. ,   Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences
Published: January 2022

A review of the literature data and methods for calculating the Poisson coefficient of the TiNi intermetallic compound in the poly- and single-crystal state is performed. The results of our own research are also presented. Significant variability of the presented data is noted, due to differences in the thermomechanical processing of the alloys and the measurement and calculation methods used. By averaging the matrices of elastic constants and compliance coefficients using the Voigt, Reuss, and Hill approximations, we obtained the values of the parameters of the effective elastic properties of TiNi polycrystals and calculated the Poisson’s ratio. Using analytical expressions to calculate the values of the extreme values, the extrema of the Poisson’s ratio of cubic TiNi crystals are determined for standard orientations. Based on a number of data, TiNi crystals are auxetics (materials having negative Poisson’s ratio values), on the basis of others they are not. We found that TiNi crystals belong to the so-called partial auxetics, in this case the signs of the inequalities (s12 < 0, s = s11 + s12 − s44/2 > 0 or s12 > 0, s = s11 + s12 − s44/2 < 0) are opposite. The values of the Poisson’s ratio TiNi averaged over the transverse directions of deformation are analyzed. Isosurfaces of the Poisson’s ratio and their sections are presented using the ELATE computational graphic package and the MATHCAD computer algebra program. Aspects of TiNi elastic anisotropy, its parameters, and their relationship with martensitic transformations in TiNi and alloys based on it are discussed.
Interaction of WС and Cr3С2 carbides during heat treatment of WС – Cr3С2 – Сu alloys
Authors:   Institute of Metallurgy of Ural Branch of RAS, Bodrova L. E. , Goida E. Yu. ,   Institute of Metallurgy of Ural Branch of RAS, Melchakov S. Yu. ,   Institute of Metallurgy of Ural Branch of RAS, Shubin A. B. ,   Institute of Metallurgy of Ural Branch of RAS, Fedorova O. M. ,   Institute of Metallurgy of Ural Branch of RAS
Published: January 2022

Composite alloys WC – Cr3C2 – Cu were obtained by infiltration of copper melt into uncompacted powders WC and Cr3C2 (reference alloys) and their mixtures with a weight ratio WC: Cr3C2 = 1:1. Impregnation of uncompacted carbide powders with copper melt was carried out at low frequency (~ 80 Hz) vertical vibration (LFV) of the crucible with alloy components for 10 min in a resistance furnace in an atmosphere of flowing argon. The effect of heat treatment of the obtained model composites on the interaction of carbides WC and Cr3C2 under isothermal and dynamic action of temperature, as well as during high-speed cyclic heating of the alloy surface by an electric arc (120 A, 45 V, 2 Hz, 10000 arc interruption cycles) has been studied. The evolution of the structure of alloys has been investigated by means of electron microscopy, X-ray spectral microanalysis, X-ray phase and differential thermal analysis. It is shown that the action on the sample surface of the temperature field created by an electric arc leads to an intense interaction of carbides. In this case, matrix copper, periodically transforming into a melt, plays the role of a transfer medium (diffusion medium). As a result of such heat treatment in the upper layers of the alloys, finely dispersed compositions of complex carbide phases with sizes of ≤ 1 – 2 μm were formed, i.e. 1 – 2 orders of magnitude smaller than the size of the initial carbides.
Corpo e Psicoterapia Corporal na Aldeia Global
Authors: Helferich Christoph
Published: January 2022

A realidade da Aldeia Global influencia profundamente a psicoterapia corporal, desafiando conceitos estabelecidos como «natureza”, «corpo” e «identidade pessoal”. Este artigo pesquisa essas mudanças, desenvolvendo especificamente três pontos: a) Os conceitos de «corpo” e «natureza” nos fundadores da psicoterapia corporal; b) O desafio a esses conceitos pela evolução gradual do avanço tecnológico e da comunicação virtual; c) A tarefa da psicoterapia hoje, a saber, ampliar a conscientização da importância tanto da «natureza” externa a nossa volta, quanto de nossa «natureza” interna corporal, que não podem mais ser tomadas como certas; em vez disso, ambas precisam tornar-se objetivos de nossas escolhas e estilos de vida. Na seção de considerações clínicas, o autor apresenta a técnica de «contato nutriente” («nurturing contact”), que possibilita a experiência profunda do cliente da sua própria essência corporal.
Evaluación Multicriterio aplicada a la determinación de escenarios de peligrosidad en la cuenca del arroyo Napostá Grande (provincia de Buenos Aires, Argentina)
Authors: Mastrandrea Aldana , Angeles Guillermo Raul
Published: January 2022

La presente investigación tiene como objetivo determinar áreas expuestas al peligro de eventos de exceso hídrico en la cuenca hidrográfica del arroyo Napostá Grande (provincia de Buenos Aires, Argentina) a partir de técnicas de Evaluación Multicriterio (EMC) y álgebra de mapas. Para ello, se seleccionaron variables del medio natural vinculadas con la generación de inundaciones, anegamientos y desbordes del arroyo Napostá Grande. Se construyó una matriz en la que se establecieron pesos de acuerdo con el nivel de importancia relativa que cada variable, y sus componentes, presentan con respecto a la probabilidad de incrementar los niveles de peligrosidad a través del método de comparación por pares. Se analizaron los resultados a través de Sistemas de Información Geográfica y mediante EMC para identificar los sectores susceptibles a sufrir eventos de exceso hídrico con el propósito de implementar un Sistema de Ayuda a la Decisión Espacial. Se obtuvieron resultados parciales que llevan al resultado final por combinaciones estadísticas y cartográficas. Se verificó la localización de sectores expuestos a la ocurrencia de eventos de exceso hídrico a través de diferentes categorías de peligrosidad (muy baja, baja, media, alta y muy alta), información relevante para la planificación y gestión territorial.
DEVELOPING STUDENT WORKSHEET-BASED COOPERATIVE LEARNING MODEL FOR IMPROVING PROBLEM SOLVING ABILITY
Authors: Mayasari Dian , Natsir Irmawaty , Pagiling Sadrack Luden , Taufik Abdul Rachman
Published: January 2022

Problem-solving ability is one of the essential skills for students in learning mathematics. This ability can be developed through teaching and learning activities using student worksheet-based cooperative model. However, these student worksheets are still rarely found in teaching and learning activities in the classroom, so this research aims to develop student worksheets based on cooperative learning models used to develop students' problem-solving abilities. The study used development research methods with ADDIE procedures, namely analysis, design, development, implementation, and evaluation. The test of the developedstudent worksheet was carried out at SMP Negeri 1 Merauke, using valid, practical, and effective categories. It is collecting data through interviews, observations, questionnaires, and tests. Data analysis was carried out by data reduction, presentation, and conclusion. This research produces student worksheets based on cooperative learning models to improve students' problem-solving abilities. The results of this study contribute to enriching teaching materials in the form of student worksheets for educators which can improve problem-solving skills.
THE EFFECT OF JIGSAW TYPE OF COOPERATIVE LEARNING ON CRITICAL THINKING ABILITY OF JUNIOR HIGH SCHOOL STUDENTS
Authors: Tamur Maximus , Subaryo Subaryo , Ramda Apolonia H , Nurjaman Adi , Fedi Sebastianus , Hamu Aleksander
Published: January 2022

Critical thinking ability is an essential component of the four skills needed in the 21st century. However, this ability is still challenging to achieve well by students because of the lack of communication and cooperation during learning mathematics. Therefore, this experimental study with a posttest-only control design was conducted to determine the effect of using the jigsaw cooperative learning model on students' mathematical critical thinking skills. This study involved 62 students consisting of 31 students for the experimental class and 31 students for the control class. Data were analyzed using parametric statistics, namely t-test. The calculation of effect sizes is carried out to determine how much influence the Jigsaw cooperative model has on critical thinking skills using the Hedges'g equation. The analysis results concluded that the critical thinking skills of students who were taught using the jigsaw cooperative learning model were better than those taught using the direct learning model, at a significance level of 0.05. Further analysis obtained an effect size of 0.64, indicating that jigsaw cooperative learning has a moderate effect on students' critical thinking skills. These results provide helpful information for educators and researchers to consider mediators that might mediate the implementation of the learning method in the future.
Analisis Pengukuran Usability Testing Mode Kendali Aplikasi Robot USMAN untuk Sterilisasi Lantai Masjid
Authors: Shidiqi Qolbun Salim As , Utami Ema , Sofyan Amir Fatah
Published: January 2022

Lantai masjid merupakan media potensial untuk penyebaran COVID-19. Virus dapat menempel pada lantai dan terhirup oleh jamaah saat melakukan salat, sehingga dibutuhkan alat untuk membantu sterilisasi lantai masjid secara berkala. Dengan robot sterilisasi USMAN yang dilengkapi dengan sinar UVC diharapkan dapat membantu proses sterilisasi secara efektif. Robot USMAN dikendalikan dengan dua metode yaitu control panel dan aplikasi mobile. Tujuan penelitian ini adalah menganalisis dan mengukur kegunaan (usability) metode kendali pada robot USMAN dengan kendali aplikasi mobile yang mana adalah pengembangan dari metode control panel. Sehingga dapat diketahui bagian-bagian yang perlu dibenahi ataupun ditingkatkan dalam hal kegunaannya. Kebaruan pada penelitian ini adalah mengetahui performance metric dan usability issues dari mode kendali aplikasi sehingga user lebih dapat bermanuver dengan mode kendali aplikasi dan menjadi acuan untuk pengembangan aplikasi robot USMAN di kemudian hari. Metode penelitian dilakukan dengan dimulai dari analisis dan perancangan, implementasi usability testing, dan analisis hasil. Aplikasi Robot USMAN memilik tingkat kesuksesan 100% di mana tidak ada satu pun user yang menyerah/gagal dalam mengoperasikan aplikasi. Waktu yang dicapai user pada saat pengoperasian aplikasi secara umum didapatkan waktu tercepat 10.46 detik dan waktu terlambat adalah 142.86 detik. Tingkat kesalahan yang didasarkan kepada heatmap yang terekam didapatkan masih banyak terjadi salah klik pada tugas 3 karena alur yang lebih panjang dari pada tugas yang lainnya. Tingkat kepuasan pengguna menggunakan UEQ didapatkan nilai rata-rata dari masing-masing skala yang diuji di mana attractiveness, dependability, stimulation, dan novelty mendapat nilai excellent, perspicuity mendapatkan nilai above average, dan efficiency mendapatkan nilai good.
Algoritma K-Means pada Pengelompokan Pembelajaran Tatap Muka Terbatas Sesudah Vaksinasi COVID-19
Authors: Kartikawati Lili , Kusrini Kusrini , Luthfi Emha Taufiq
Published: January 2022

Pandemi COVID-19 menimbulkan potensi dampak sosial yang kurang baik, peranan sekolah dalam proses belajar mengajar tidak terlihat. Akses dan kualitas pembelajaran jarak jauh berbanding lurus dengan capaian belajar peserta didik. Capaian hasil belajar peserta didik menunjukkan tingkat kualitas pembelajaran yang telah dilakukan. Peserta didik yang terkendala dalam mencapai hasil belajar maka dibutuhkan langkah perbaikan proses belajar di antaranya melalui pembelajaran tatap muka terbatas. Pembelajaran tatap muka terbatas wajib menaati prosedur kesehatan, di antaranya pembatasan jumlah maksimal peserta didik dalam satu Rombel. Pengelompokan peserta didik dipilih sebagai solusi pembatasan jumlah peserta didik dalam Rombel. Metode eksperimen penelitian ini diterapkan pada hasil capaian belajar selama tengah semester genap 2020/2021 peserta didik X Usaha Perjalanan Wisata 1 di SMK Negeri 4 Yogyakarta. Pengelompokan dan pembuktian kualitas pengelompokan algoritma K-Means menggunakan metode silhouette coefficient serta rumus euclidean distance untuk mengukur jarak di antara dokumennya. Hal yang membedakan dengan penelitian clustering sebelumnya di antaranya dilakukan pengukuran kualitas peng-cluster-an dan melakukan penggalian lebih dalam pada pola-pola baru hasil peng-cluster-an yang terbentuk sehingga didapatkan pengetahuan baru. Kualitas clustering menghasilkan nilai Si=0,8313 yang berarti memiliki karakteristik struktur kuat dan menampilkan pengetahuan baru berupa kelompok rumpun mata pelajaran yang menginformasikan tingkatan daya serap peserta didik terhadap mata pelajaran.
Angular superresolution in airborne radar systems
Authors:   JSC «RPC «Istok» named after Shokin", Ilchuk A.R. ,   , 141190, Fryazino, Vokzalnaya st., 2а, Kargashin Yu.D. ,   JSC «RPC «Istok» named after Shokin", 141190, Fryazino, Vokzalnaya st., 2а, Merkulov V.I. ,   JSC «Vega Radio Engineering Corporation», 121170, Moscow, Kutuzovsky ave., 34, Chernov V.S. ,   JSC «Vega Radio Engineering Corporation», 121170, Moscow, Kutuzovsky ave., 34
Published: January 2022

In the practical application of aircraft, situations are possible when in the on-board radar system (onboard radar) it is not possible to resolve the signals of radar targets in the channels for measuring range, velocity and angular coordinates. In these situations, it is expedient to use superresolution angular estimation procedures in the radar. There are various methods and algorithms for angular estimation with superresolution, each of which has its own advantages and disadvantages. At the same time, in the available scientific and technical literature there is no information on the superresolution angular estimation algorithms used in the radar, the knowledge of which is necessary in the design of promising radar. The article systematizes and analyzes methods and algorithms for angular estimation with superresolution. A classification of methods of angular estimation with superresolution is given. Generalized information about known one-dimensional and two-dimensional methods and algorithms of angular estimation is presented. The algorithms proposed for use in planar antenna arrays (ARs), concentric annular antenna arrays, ring antenna arrays, circular four-quadrant ARs, planar ARs with a total output signal are considered. It is noted that among the features of the construction of an on-board radar is the reduction in the total number of information processing channels, achieved by combining antenna elements into subarrays, the output signals of which are used to estimate the angular coordinates of radiation sources. The specificity of such antenna arrays is that the antenna subarrays have directional patterns that are narrower than those of weakly directional antenna elements. In addition, the distance between antenna modules can significantly exceed the distance between antenna elements in a conventional antenna array and, at the same time, significantly exceed the wavelength size. To determine the possibilities of practical application of the algorithms of angular two-dimensional estimation with superresolution in an on-board radar with a modular AA, considered in the article, special studies are required.
Investigating the effectiveness of solution-focused group counselling and group guidance programs to promote healthy internet use of university students
Authors:   Guidance and Counselling Department, Faculty of Education, Afyon Kocatepe University, Turkey, Sağar Mehmet Enes
Published: January 2022

This research aims to investigate the effectiveness of a “solution-focused group counseling program to increase healthy Internet use” and “group guidance to increase healthy Internet use” to increase healthy Internet use among young people. The study group for the research comprised 39 university students (22 females 56%, 17 males 44%). In this study, the Personal Information Form, Interview Form and Problematic Internet Use Scale were used as data collection tools. Analysis of data used the ANOVA for mixed measures and content analysis of interviews with participants in the solution-focused group counseling program about increasing healthy Internet use about their experiences. In the results of the research, it was determined that the solution-focused group was more effective than the guidance group and the control group. It was determined that the guidance group was also more effective than the control group. In addition, it was determined that this differentiation in the groups continued to be effective in the follow-up measurements made 3 months after the completion of the application.
NATURAL BENDING VIBRATIONS OF THE BEAM WITH THE SPECIAL LAW OF CHANGE OF WIDTH
Authors:   National Technical University of Ukraine“Igor Sikorsky Kyiv Polytechnic Institute”, Trapezon Kirill , Trapezon Alexandr ,   G.S. Pisarenko Institute for Problems of Strengthof the National Academy of Sciences of Ukraine
Published: January 2022

Purpose. The aim of the work is to construct a closed analytical solution of the problem of natural vibrations of the beam, the width of which varies according to the law exp (αx2). Methodology. The approach is based on the provisions of symmetric analysis of differential equations with variable coefficients. This approach allows you to find a way to obtain an analytical solution of the corresponding differential equation and, ultimately, the boundary value problem. Findings. The main result is the construction of the algorithm and obtaining the solution of the differential equation of the IV order, which describes the transverse bending vibrations of the beam with a special law of change of width (the thickness of the beam is a constant value). Two examples of the analysis of oscillations of such beam in case of its bilateral rigid fastening and cantilever fastening are resulted. For these cases, the frequency equations are obtained, the natural frequencies and amplitude coefficients are found, which are necessary for the construction of natural forms of oscillations. Originality.The approach presented in this paper is based on the idea of symmetries of differential equations and is characterized by a sim- plified analysis of the solution of the problem of bending oscillations of the beam with a special law of width. The method proposed for solving the boundary value problem is convenient and simple, because the results are found without the use of numerical research methods. Practical value.Examples of the exact analysis of fluctuations which allow to assert about real possibility of expansion of an existing number of configurations of a beam, both on width, and on ways of fastening are resulted. Such beams can, for example, be used as prototype samples for resonant tests of materials for fatigue strength. Сonclusions. The given algorithm for constructing the solution of the problem on eigenvalues for a beam with the given special law of change of width is universal and can be extended to other constructions of beams. Since in this case the question arises only about the choice of the approximation function, which allows to use the method of symmetries and obtain an exact solution of the corresponding differential equation of the IV order, which in turn describes the transverse oscillations of the beams.
THEORETICAL DEFINITION OF THE LAW OF STRESS CHANGES THAT OCCUR IN POLYMER CONCRETE WHEN IT IS COMPACTED BY A VIBRATING PLATE
Authors:   Kremenchuk Mykhailo Ostrohradskyi National University, Maslov Aleksandr , Savielov Dmytro ,   Kremenchuk Mykhailo Ostrohradskyi National University
Published: January 2022

Purpose. Based on a thorough analysis of the scientific and technical literature, it is established that for the mass production of quality materials and products from polymer concrete compositions, the most effective will be a vibration method of sealing, which means that when they are received, the vibrating working bodies of the forming technological equipment will interact with the polymer concrete mass. Methodology. For the theoretical determination of the nature of the interaction of the surface vibrating working body with polymer concrete, the study of the dynamic system "vibration plate - polymer concrete" was performed. In this dynamic system, compacted polymer concrete is presented in the form of a system with distributed parameters, which takes into account the action of elastic and dissipative resistance forces acting from the polymer concrete side when it is deformed on a vibrating working body. Results. In accordance with the accepted rheological model of polymer concrete for the uniaxial stress condition, the dependence in the individual derivatives be- tween the stress and the deformation of the polymer concrete is proposed, the nature of which depends on the dynamic modulus of elastic deformation, the dynamic modulus of Maxwell's elastic deformation and the coefficient of dynamic viscosity. A wave equation of oscillation is proposed, which describes the propagation of elastic-viscous deformation waves in polymer concrete deformed by a surface vibrating working body. To solve the wave equation of oscillations, boundary conditions are drawn. The first boundary condition describes the interaction of a surface vibrating working body with a compacted concrete. The second boundary condition implies that the displacement of the sealed layer of polymer concrete at a certain distance from the surface of the vibrating working body is zero. We find constant integrations (complex am- plitudes) that satisfy the accepted boundary conditions. Originality. Based on the solution of the wave equation of oscil- lations describing the propagation of deformation waves in the compacted concrete, it is determined: the regularity of propagation of elastic-viscous deformation waves in the polymeric concrete and the expressions for numerically deter- mining the coefficients of rigidity polymer concrete resistance, law and vibration amplitude of surface vibrating working body. The stresses arising on the surface and depth of the polymer concrete when exposed to the surface vibrating working body are determined. Practical value. The obtained theoretical dependences make it possible to reasonably determine the rational parameters of the surface vibrating working body depending on the physical and mechanical properties of the compacted polymer concrete.
DEVELOPMENT OF A METHOD FOR DETERMINATION OF THERMOPELASTIC STRESSES IN GAAS PLATES
Authors:   Kremenchuk Mykhailo Ostrohradskyi National University, Oksanich Anatolii , Kogdas Maksym ,   Kremenchuk Mykhailo Ostrohradskyi National University, Dragobetsky Volodymyr ,   Kremenchuk Mykhailo Ostrohradskyi National University, Bakhmat Viktor ,   Kremenchuk Mykhailo Ostrohradskyi National University
Published: January 2022

Purpose. А study of the temperature field of the melt during the cultivation of GaAs single crystals from under a layer of liquid flux. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs.Methodology. Finite element method is used to calculate temperature profiles and internal thermoplastic stresses. The mechanism of theoretical and experimental researches which allow to predict thermoplastic stresses in the course of cultivation of ingots is offered. For the analysis and mathematical calculations of the stationary differential equation in partial derivatives and the equations of thermoelasticity, respectively, use the finite element method, the calculations were performed in the programs THERMIX and INCA. Temperature profiles and internal thermoplastic stresses were calculated. Thermoplastic stresses were measured on plates cut from the upper, middle and lower part of the ingot of undoped GaAs (cm-3) with a thickness of 1 mm with a resistivity of 108 Ohm x cm, diameter 50 mm, orientation (111).The axial temperature gradient is determined. Experimentally obtained values of ison voltage lines along the plane of GaAs plates cut from different parts of the ingot. To measure the internal (thermoplastic) stresses in the work used the method of photoelastic-guests in infrared polarized light. The integrated picture of thermoplastic stresses was obtained using the "Polaron" installation, and the point measurement with the construction of the iso-voltage line was obtained on the "Polaron-2" installation. Originality. As a result of the research it can be concluded that the mechanism of theoretical and experimental researches is offered in the work, which allows to predict thermoplastic stresses in the process of growing GaAs ingots and, finally, to develop a procedure for reducing dislocation density in GaAs ingots. The practical value. the proposed method will improve the technology of growing ingots of gallium arsenide with a more homogeneous technology, which will be a good indicator for the future creation of gas sensors from this material.
CORRELATIONAL INTERDEPENDENCE OFUNIVERSITY BRAND AND PROFESSOR’S BRAND
Authors:   M. P. Dragomanov National Pedagogical University, Yunyk Ivan
Published: January 2022

Purpose. Of the article is to highlight the correlational interdependence of the concepts "university brand" and "professor’s brand". Methodology. In course of research the following methods were used: analysis and synthesis, in- duction and deduction, extrapolation and modeling of the initial provisions of psychological and pedagogical science. Results. The field of higher education in Ukraine is dominated by the Eastern (Asian) approach to branding, which is characterized by the creation and promotion of the corporate brand of higher education as a direct guarantee of success of professor’s brands as its subbrands. In turn, the success of branding initiatives by professors of universities act solely as a direct result of branding of the whole institution, which leads to total disregard of the need to form own brands by them. The professor's brand constantly interacts with the university brand and is in a state of direct dependence on it. The nature of this dependence is determined by the architecture of university's brand portfolio and the role assigned to the professor's brand in this portfolio. The effectiveness of the interaction of professor's brand with university brand increases under the condition of dominance between them of mutually supportive (synergistic) or at least unilaterally predominant interaction. Manifestations of mutually oppressive, unilaterally oppressive and/or oppressive-predominant interaction of brands of university and professor indicate their strategic incompatibility as self-organized systems and have a destructive effect on the quality of training applicants for higher education. The model of oppressive-predomi- nant interaction of the professor's brand with the brand of university can be consciously used by one of them only for the purpose of temporary situational support of the "brand-confederate" in the absence of excessive resource, image and/or reputational losses for the "initiator brand". Ignoring the need for brand formation by university actualizes for it the risks of losing professors interested in personal branding and, consequently, actualizes the problem of deficit of highly qualified personnel. The mutually supportive interaction of the professor's brand with the university brand cre- ates a synergy effect, ensuring their competitiveness in relation to the brand proposals of the world's leading higher ed- ucation institutions, which intend to enter the Ukrainian market of educational services in the near future. The original- ity of the author's research is based on its interdisciplinary nature: the initial provisions of marketing, management, psy- chology, sociology and a number of other fields of knowledge are extrapolated to the theory and methods of professio n- al education in the article. Practical value. The obtained results should be used in the process of brand formation by professors and university administration.
RANCANG BANGUN ALAT RAGUM DENGAN SISTEM KERJA OTOMATIS
Authors: Arifin Efrizal , Hidayat Asep
Published: January 2022

Alat Ragum (Catok) yang selama ini masih ada yang menggunakan system secara manual. Cara menjepit benda kerja yang dilakukan masih kurang efisien dan kurang sempurna dari segi waktu dan menggunakan tenaga. Tujuan dari pembuatan dan analisa alat ragum catok system otomatis ini ialah mengurangi dan menghemat waktu maupun tenaga yang terlalu banyak terbuang untuk system ragum manual. Dari hasil yang di peroleh dari analisa alat ini adalah tenaga dan waktu bias diminimalisir dan lebih efisien daripada menggunakan ragum catok secara manual. Hasil dari perancangan alat ragum catok ini adalah dilakukan dengan melakukan pengukuran lalu dibuat desain gambar 2D dan 3D alat ragum otomatis lalu membuat meja ragum sesuai ukuran. Dan system kerja alat ragum otomatis ini menggunakan remot control dan didukung dengan pemutus arus dengan penggerak mesin atau motor listrik sehingga membantu pengerjaan menjadi lebih efisien.  Kata Kunci: Perancangan, Alat, Ragum, Otomatis.