bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Transient- and Steady-State Acceleration Signals in Intelligent Tires
Authors: Zhao Tong , Liang Guanqun , Wang Yan , Wei Yintao
Published: October 2021

The accelerometer-based intelligent tire has gained focus in recent years for its ability to obtain both kinematics and dynamics-related information of the tire. This paper extends the previous steady-state applications of acceleration signals, which mainly estimate tire force, sideslip, and friction coefficient from the steady-state features of acceleration waveforms, to transient acceleration applications. By using the proposed tire mixed Euler–Lagrange rolling model, it is analytically demonstrated that tire rolling acceleration can be decomposed into steady-state and transient-state components from the perspective of kinematics. It is hard to analyze the transient-state component theoretically or split it from the measured signals on real road surfaces; thus, a learning-based algorithm is developed to automatically extract discriminative features without any physical models. With this method, essential information associated with tire transient acceleration could be inferred to help improve driving safety and performance.

As the application, tire wear identification with an artificial neural network is validated to be feasible based on complete acceleration signals. The prediction accuracy reaches 98.2% under different test conditions. The proposed acceleration formation mechanism is proved to be effective in explaining tire rolling acceleration as well as guiding to acquire vital information about the tire to improve vehicle safety and performance.
Effect of Different Road Obstacles on the Structural Behavior of a Honeycomb Nonpneumatic Tire
Authors: Ashofteh Afshin , Shahdadi Amirhossein
Published: October 2021

The nonpneumatic tire (NPT), as the name suggests, is a type of tire that does not use air to support the load. Because of their outstanding advantages, such as durability and low rolling resistance, these tires have attracted much interest. The study of NPTs has drawn considerable recent attention, and some research was conducted to investigate their mechanical response. However, these studies did not consider an analysis of an NPT against obstacles. Therefore, in this article, the static and dynamic behaviors of an NPT with honeycomb structures rolling over different obstacles are investigated using numerical simulation. The flexible spokes, which are the most important part of NPTs, are assumed to have a honeycomb structure with the same cell wall thickness and angle. Based on the mesostructures hypothesis, these spokes are considered to be made of polyurethane material. To perform a more precise analysis, various parameters such as nonlinear properties of the material and contact condition are taken into account to establish the finite element model. The results, which can be used as a benchmark and are suitable for design purposes, are presented elaborately.
Self-Excited Full-Vehicle Oscillations Caused by Tire–Road Interaction: Virtual and Real-World Experimental Investigation
Authors: Engel Dirk
Published: October 2021

In this article, self-excited full-vehicle oscillations (power-hops) are introduced. Initially, results of full-vehicle measurements are shown followed by the presentation of a specially build test rig (longitudinal dynamics test rig). Subsequently, these oscillations are investigated by using simulation-based tools within multibody simulation–related full-vehicle modeling. Tire–road interaction is evaluated in this process either by characteristic curves or by a proprietary quasistatic tire model that returns overall tangential forces by evaluating the state of every discretized element within the footprint area.
Research on the Contradiction Mechanism of Tire Rolling Resistance and Grip Performance
Authors: Liang Chen , Li Haowen , Wang Guolin , Yu Kangying
Published: October 2021

In order to clarify the contradictory mechanism between tire rolling resistance and grip performance, 10 205/55 R16 radial tires with different tread patterns were selected as the research objects. Based on digital image correlation method, the pressure and deformation distribution in the contact area of test tires were obtained and the relevant grounding parameters were extracted. The partial least square regression (PLSR) method was used to establish the relationship between the identified grounding parameters and tire performance indicators. Using the bootstrap resampling method, the significance test of the PLSR coefficients were carried out, and the grounding characteristic parameters with significant explanatory effect on the performances were selected, identifying the main function area for the two performances. The results show that in order to improve the grip performance of the tire, it is necessary to reduce the transverse tensile strain of the tread in the contact area and increase the longitudinal tensile strain of the tread; but, with the increase of the longitudinal tensile strain, the rolling resistance of the tire will also increase, which leads to the contradiction between tire rolling resistance and grip performance.
Quantum Entanglement Results from Quantum State Transition at Fast-Than-Light Speed with Matter Wave’s Phase Velocity
Authors: Xinye Wang
Published: October 2021

The quantum entanglement, that violates the local realism and other classical physics theories, leads to various counterintuitive phenomena, is a primary feature of quantum mechanics and probably results from the quantum state’s conservation and the quantum state’s transition with the matter wave’s phase velocity at the fast-than-light speed. The quantum state transition of entangled particles proceeds with the phase velocity, while the observer measures the process with the electromagnetic or the light speed. This speed difference makes the causality law no longer fully valid everywhere except in certain areas.
Research on Rolling Bearing Fault Feature Extraction and Diagnosis Method Based on Image Processing
Authors: Y Sun
Published: October 2021

In economic construction, there are many large and important machinery and equipment. Some equipment will continue to work in a harsh working environment, so many and various failures will occur. Rolling bearings are one of the widely used parts in rotating machinery. They are generally composed of inner ring, outer ring, rolling element and holding. The frame is composed of four parts, the failure of the bearing is particularly important, and its safe operation has a vital impact on the entire equipment, Feature extraction is the key link in the subsequent identification of fault types, Although feature extraction in the time domain and frequency domain is effective, it is also necessary to find new feature extraction methods in new areas. On the basis of the snowflake image obtained by using the principle of SDP(Symmetrized Dot Pattern), a method for extracting fault features of rolling bearings based on image processing is proposed, and the snowflake standard map for different working conditions is constructed. The number of snowflake images under different working conditions is different. The binary matrix of the test image is compared with it, and then classified and identified. Finally, the algorithm is validated, and the ideal result is obtained to verify its rationality and effectiveness.
PENGARUH PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE NUMBERED HEAD TOGETHER TERHADAP HASIL BELAJAR TEKNIK DASAR PASSING BOLA VOLI
Authors: Gautami Ida Ayu Kade Geby , Darmayasa I Putu
Published: October 2021

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe STAD terhadap hasil belajar teknik dasar passing bola voli. Jenis penelitian adalah eksperimen sungguhan (true experimental) dengan rancangan the randomized pretest-posttest control group the same subjec design. Populasi penelitian ini adalah seluruh siswa kelas XI SMA Negeri 2 Banjar tahun pelajaran 2018/2019, keseluruhan kelas berjumlah 8 kelas dengan populasi 259 orang. Pengambilan sampel yang digunakan simple random sampling berdasarkan kelas. Kelas yang menjadi sampel penelitian adalah kelas XI IPS 1 sebagai kelompok eksperimen kelas dan kelas XI IPS 2 sebagai kelompok kontrol. Eksperimen dilakukan sebanyak 3 kali perlakuan diluar pretes-posttest. Data hasil belajar dikumpulkan melalui tes objektif, observasi dan unjuk kerja. Analisis data menggunakan uji-t dengan bantuan SPSS 16.0 for Windows. Rata-rata kelompok eksperimen adalah 0.5 lebih tinggi dari rata-rata kelompok kontrol adalah 0.21. Signifikansi pada uji hipotesis diperoleh melalui uji parametrik (uji Independent Samples Test) adalah 0.000. Disimpulkan bahwa model pembelajaran kooperatif tipe STAD berpengaruh signifikan terhadap hasil belajar teknik dasar passing bola voli. Disarankan kepada guru penjasorkes dapat menerapkan model pembelajaran kooperatif tipe STAD karena terbukti berpengaruh signifikan terhadap hasil belajar siswa.
Pengembangan Model Pembelajaran Aktivitas Jasmani Melalui Permainan Tradisional bagi Siswa Sekolah Dasar
Authors: Lestari Dyah Frika
Published: October 2021

Pada penelitian ini bertujuan untuk (1). Menghasilkan model pengembangan pembelajaran berbasis aktivitas jasmani dalam karakter disiplin yang disajikan sesuai dengan tema pembelajaran kelas III SD, (2) Menguji keterlaksanaan model pengembangan pembelajaran berbasis aktivitas jasmani dalam karakter disiplin yang disajikan sesuai dengan tema pembelajaran kelas III sekolah dasar, (3) Menguji ketertarikan peserta didik terhadap model pengembangan pembelajaran berbasis aktivitas jasmani dalam karakter disiplin yang disajikan sesuai dengan tema pembelajaran kelas III sekolah dasar. Teknik pengumpulan data menggunakan pedoman observasi Pengumpulan data yaitu dengan observasi, terhadap pembelajaran Pendidikan Jasmani di SD N Sendangmulyo 01 Semarang Kelas III, Wawancara kepada guru Pendidikan PJOK,studi dokumentasi, angket atau kuisioner, rekaman vidio kegiatan pembelajaran ketika dilapangan kemudian di konversikan ke data pengembangan kualitatif. Subjek penelitian adalah siswa kelas III di SD N 01 Sendangmulyo Semarang. Penelitian ini menunjukkan bahwa hasil validasi yang dilakukan diperoleh persentase rata-rata penilaian sebesar 85,25% diterima dengan baik. Berdasarkan hasil peneltian dan pembahasan dapat disimpulkan bahwa model pembelajaran aktivitas jasmani melalui permainan tradisional bagi siswa sekolah dasar dapat meningkatkan rasa senang dan percaya diri  pada siswa.
Hasil Belajar Bola Basket dengan Penerapan Model Pembelajaran Kooperatif Tipe STAD
Authors: Antara Kadek Arya Dwi , Budhiarta I Made Danu , Wijaya Made agus
Published: October 2021

Penelitian ini bertujuan mengetahui pengaruh model pembelajaran kooperatif tipe Student Teams Achievement (STAD) terhadap hasil belajar teknik dasar passing bola basket (passing overhead pass dan passing chest pass). Penelitian merupakan penelitian eksperimen sungguhan (true experimental) dengan menggunakan rancangan penelitian the pretest post-test control group design. Penelitian dilaksanakan pada siswa kelas XI SMA Karya Wisata Singaraja tahun pelajaran 2016/2017 dengan sampel berjumlah 46 orang siswa yang terdistribusi ke dalam dua kelas yaitu kelas XI IPB 5 dan kelas XI IPB 6. Teknik sampling menggunakan simple random sampling. Data hasil belajar terdiri atas 1) aspek kognitif, menggunakan tes essay, 2) aspek afektif, menggunakan observasi sikap siswa selama pembelajaran, dan 3) aspek psikomotor, menggunakan observasi kinerja passing bola basket. Tahapan analisa data terdiri atas: 1) uji prasyarat, menggunakan uji normalitas data menggunakan Kolmogorov-Smirnov dan uji homegenitas Levene’s Test of Equality of Error Variance, serta 2) Uji hipotesis, menggunakan uji-t pada taraf signifikansi p<0.05.Berdasarkan uji prasyarat, di peroleh hasil bahwa data penelitian berdistribusi normal dan homogen.Uji-t menunjukkan thitung 2.430 sedangkan ttabel sebesar 1.678 dan nilai signifikansi yang diperoleh melalui uji t adalah 0,019.Merujuk hasil analisa data dan pembahasan, simpulan penelitian ini adalah penerapan model pembelajaran kooperatif tipe STAD berpengaruh signifikan terhadap peningkatan hasil belajar teknik dasar passing bola basket pada siswa kelas XI SMA Karya Wisata Singaraja tahun pelajaran 2016/2017. Dengan demikian disarankan kepada guru penjasorkes dapat menerapkan model pembelajaran kooperatif tipe STAD karena terbukti berpengaruh signifikan terhadap peningkatan hasil belajarsiswa.
Perkembangan Kecerdasan Logika Matematika Melalui Renang Artistik
Authors: Danardani Wasti , Soegiyanto Soegiyanto , Setijono Hari , Sulaiman Sulaiman
Published: October 2021

Tujuan penelitian adalah melihat perkembangan kecerdasan logical-matematika pada atlet renang artistik sebagai efek dari hasil latihan yang dijalani. Cabor renang artistik merupakan olahraga yang tidak terukur dengan tingkat subjektifitas tinggi. Menampilkan keterampilan  gerak, musik pengiring, dan keselarasan diantaranya. Penelitian ini menggunakan metode grounded theory kualitatif. Metode pengumpulan data dalam penelitian ini melalui catatan lapangan, wawancara kepada informan dengan mencatat dan mencatat informasi. Subjek penelitian adalah anggota tim nasional terdiri dari 10 perenang berusia 12-24 tahun. Hasil peneitian Keterampilan gerak perkembangan kognitif khususnya ingatan terkini. Kekhasan tampilan renang artistik dapat membantu perkembangan kecerdasan logika –matematika pada perenang artistic.
PERSEPSI WISATAWAN TENTANG PARIWISATA OLAHRAGA DI MIRAH FANTASIA DESA LATENG KABUPATEN BANYUWANGI
Authors: Prayoga Dimas , Wahjoedi Wahjoedi , Semarayasa I Ketut
Published: October 2021

Penelitian ini bertujuan untuk mengetahui persepsi wisatawan tentang pariwisata olahraga di Mirah Fantasia Desa Lateng Kabupaten Banyuwangi. Jenis penelitian adalah jenis penelitian deskriptif kuantitatif, dengan menggunakan metode survei dengan teknik pengambilan data observasi, kuisioner, dokumentasi. Populasi dalam penelitian ini adalah wisatawan yang berkunjung ke Mirah Fantasia dimana mereka yang telah menikmati pariwisata olahraga. Analisis data yang digunakan dalam penelitian ini yaitu deskriptif kuantitatif dengan persentase. Hasil penelitian ini menunjukan bahwa (1) sumber informasi dan tujuan berkunjung memiliki persentase cukup baik dengan 83%. (2) Sarana dan prasarana pariwisata olahraga di Mirah Fantasia memiliki persentase cukup baik dengan 85%. (3) Keunikan Mirah Fantasia memiliki persentase cukup baik dengan 86%. (4) Jenis layanan wisata memiliki persentase cukup baik dengan 85%. (5) Pengelolahan memiliki persentase cukup baik dengan 86%. Kesimpulan bahwa (1) informasi mengenai Mirah Fantasia bisa didapatkan dengan mudah melalui media sosial dan media pemaparan. (2) Sebagai destinasi wisata rekreasi dengan keluarga, wisatawan memberikan persepsi yang positif terhadap pariwisata olahraga di Mirah Fantasia. (3) Potensi pariwisata olahraga yang ada di Mirah Fantasia juga membuat wisatawan memiliki persepsi yang positif untuk mendorong wisatawan meningkatkan minat berkunjung di Kabupaten Banyuwangi untuk mengunjungi Mirah Fantasia, dengan demikian peneliti menyarankan kepada wisatawan agar selalu menjaga kebersihan, dan kedepannya pengelola diharapkan terus berbenah agar menarik minat wisatawan untuk berkunjung, peneliti mengharapkan agar penelian ini dijadikan referensi untuk meneliti dalam ruang lingkup yang lebih luas.
Minat Peserta Didik dalam Berolahraga pada Masa Pandemi Covid – 19 Kelas VIII SMP Negeri 5 Singaraja Tahun Ajaran 2020/2021
Authors: Wibaawa Komang , Wahjoedi Wahjoedi , Semarayasa I Ketut
Published: October 2021

Jenis penelitian ini bertujuan untuk mengetahui minat pesertat didik kelas VIII SMP Negeri 5 Singaraja dalam berolahraga di masa pandemi covid-19. Penelitian ini adalah deskriptif kuantitatif dengan jenis penelitian survei. Populasi penelitian ini adalah seluruh peserat didik kelas VIII SMP Negeri 5 Singaraja dengan jumlah keseluruhan 202 orang siswa. Sampel penelitian menggunakan non random sampling yaitu quota sampling dengan besaran 15% dari total populasi sehingga jumlah sample dalam penelitian ini berjumlah 80. Data dianalisis menggunakan statistik deskriptif kuantitatif dengan kategori interval. Hasil penelitian ini pada faktor ekstrinsik minat peserta didik kelas VIII SMP Negeri 5 Singaraja dalam berolahraga pada masa pandemi covid-19 mendapatkan skor 73% dalam interval kategori dinyatakan sangat tinggi. Pada faktor intrinsik minat peserta didik kelas VIII SMP Negeri 5 Singaraja dalam berolahraga pada masa pandemi covid-19 mendapat skor 75% dalam interval kategori dinyatakan sangat tinggi. Dari kedua indikator pada variabel, minat peserta didik kelas VIII SMP Negeri 5 Singaraja memperoleh skor 74%. Pada interval katagori sangat tinggi . melalui temuan yang sudah di jelaskan di atas, dapat disimpulkan bahwa minat berolahraga pada masa pandemi covid-19 peserta didik kelas VIII di SMP Negeri 5 Singaraja termasuk dalam katagori tinggi. Dengan demikian, peneliti menyarankan agar peserta didik dapat mempertahankan minatnya dalam berolahraga pada masa pandemi covid-19 sehingga meningkatkan imunitas tubuh serta menjaga pola hidup sehat dan tubuh yang bugar walau di lakukan di rumah.
HUBUNGAN STATUS GIZI DENGAN TINGKAT KESEGARAN JASMANI SISWA PUTRA KELAS II DI SMA N 1 BANGKINANG KABUPATEN KAMPAR
Authors: Henjilito Raffly
Published: October 2021

Tujuan dari penelitian ini adalah untuk mengetahui derajad atau  kekuatan hubungan, bentuk atau hubungan kausal dan  hubungan timbal balik antara status gizi dengan tingkat kesegaran jasmani.Metode penelitian yang digunakan dalam penelitian ini adalah pendekatan kuantitatif, metode survei dengan teknik pengukuran dan tes, sedangkan teknik analisis menggunakan pendekatan analisis korelasi yaitu cara untuk mengetahui ada atau tidak adanya hubungan antar variabel.Pengujian hipotesis hubungan status gizi dengan tingkat kesegaran jasmani sebesar  0.85.  Hasil penelitian menyimpulkan terdapat hubungan yang signifikan antara status gizi dengan tingkat kesegaran jasmani siswa putra kelas II  SMA N 1 Bangkinang. Kata kunci : kesegaran jasmani siswa, satus gizi
UPAYA MENINGKATKAN AKURASI TEKNIK PASSING MENGGUNAKAN METODE DRILL PADA KEGIATAN EKSTRAKURIKULER SEPAKBOLA
Authors: Irawan Gustianto , Sugiarto Tatok , Kurniawan Ari Wibowo
Published: October 2021

Penelitian ini bertujuan untuk meningkatkan akurasi passing dengan metode drill pada kegiatan ekstrakulikuler SMPN 10 Malang. Penelitian ini menggunakan analisis data secara kuantitatif dengan metode penelitian tindakan olahraga (PTO), serta menggunakan instrumen berupa tes. Subjek penelitian adalah peserta ekstrakurikuler sepakbola SMPN 10 Malang yang terdiri dari 20 siswa laki – laki. Berdasarkan hasil penelitian dapat disimpulkan bahwa keterampilan passing kaki bagian dalam, kaki bagian luar dan passing kaki bagian punggung permainan sepakbola menunjukkan adanya peningkatan yang signifikan dengan penggunaan metode drill yaitu masuk pada pada kategori baik sekali.
Penerapan Model Pembelajaran Generatif untuk Meningkatkan Aktivitas dan Hasil Belajar Servis dalam Permainan Bolavoli
Authors: Adnyana Komang Sukarata , Gunarto Peby
Published: October 2021

Penelitian ini bertujuan untuk mengetahui bagaimanakah aktivitas dan hasil belajar bolavoli siswa melalui penerapan model pembelajaran generatif. Metode penelitian secara kuantitatif dan dilaksanakan 2 siklus, tiap siklus terdiri dari perencanaan, pelaksanaan, observasi dan refleksi. Subjeknya adalah siswa kelas VIII A2 SMP Negeri 4 Singaraja berjumlah 42 orang. Hasil analisis data siklus I yaitu, aktivitas belajar siswa secara klasikal ( ) sebesar 71,68%, dikonversikan dalam kriteria aktivitas belajar siswa tergolong aktif, penguasaan materi secara klasikal 66,67% berada dalam rentang  (65%-74%) kategori cukup baik. Hasil analisis data siklus II yaitu, aktivitas belajar siswa secara klasikal ( ) sebesar 91,42%, dikonversikan dalam aktivitas belajar siswa tergolong sangat aktif dan penguasaan materi secara klasikal 90,24% berdasarkan  rentang  ketuntasan (85%-100%) terkategori sangat baik. Kesimpulan penelitian ini adalah penerapan model pembelajaran generatif dapat meningkatkan aktivitas dan hasil belajar servis dalam permainan bolavoli.
Pengembangan Model Latihan Spat-Desain Materi Bola Voli Dalam Pembelajaran PJOK pada Jenjang SMP
Authors: Tapo Yohanes Bayo Ola , Bile Robertus Lili , Nenot Angela Nensiana
Published: October 2021

Penelitian ini bertujuan untuk mengembangkan dan memvalidasi kelayakan model Latihan Sirkuit Passing Atas T-Desain (SPAT-Desain) sebagai aktivitas belajar siswa materi bola voli dalam pebelajaran PJOK pada jenjang SMP. Penelitian menggunakan desain pengembangan Borg and Gall yang disesuaikan dengan kondisi pandemi covid-19, sehingga hanya berfokus pada pengembangan produk yang divalidasi melalui dua kali tahapan uji validasi ahli. Data penelitian dikumpulkan menggunakan instrumen angket skala nilai. Analisis data mengunakan teknik analisis deskriptif kualitatif dan kuantitatif, dengan hasil penelitian: (a) produk akhir pengembangan model latihan SPAT-Desain yang disusun dalam buku panduan aktivitas latihan, (b) produk akhir pengembangan memenuhi kategori “Sesuai dan Layak” sebagai aktivitas belajar siswa berdasarkan hasil validasi tiga orang ahli. Kesimpulan penelitian ini adalah model latihan SPAT-Desain Bola Voli “sesuai dan layak” digunakan sebagai bentuk aktivitas belajar PJOK materi bola voli di SMP.
Korelasi Prokrastinasi, Game Online, dan Media Sosial dengan Minat Berolahraga Peserta Didik Putra Kelas X SMKN 3 Kintamani
Authors: Mahendra I  Komang  Putra , Wahjoedi Wahjoedi , Semarayasa I Ketut
Published: October 2021

Penelitian ini  bertujuan  untuk mengetahui  korelasi  prokrastinasi,  game online, media sosial, dengan  minat berolahraga. Populasi  dalam penelitian ini adalah seluruh peserta didik putra kelas X SMK Negeri 3 Kintamani, tahun pelajaran 2020/2021, berjumlah 146 siswa. Menggunakan teknik random sampling, didapatkan 75 siswa sebagai sampel. Jenis  penelitian yang digunakan  korelasi. Pengumpulan data  menggunakan  kuesioner. Analisis  data menggunakan korelasi produk moment dan analisis  regresi linier berganda. Hasil  penelitian  menunjukkan ; (1) 64,25% peserta didik melakukan kecenderungan prokrastinasi, game online, media sosial dan minat berolahraga. (2) terdapat  korelasi positif prokrastinasi dengan minat berolahraga (nilai rhitung 0,496 > rtabel 0,227 dan Sig. 0,000 < 0,05).  (3) terdapat korelasi  negatif  game online dengan minat berolahraga (nilai  rhitung  -0,241> rtabel 0,227 dan  sig. 0,037 < 0,05).  (4) tidak terdapat korelasi media sosial dengan minat berolahraga, (nilai rhitung -0,197 < rtabel 0,227 dan nilai sig. 0,091 > 0,05).  (5) Sedangkan  hasil analisis regresi  linier menggunakan uji F( 12,249 dan nilai sig. 0,000 < 0.05), artinya  terdapat  korelasi positif secara bersama-sama  antara prokrastinasi, game online dan media sosial dengan minat berolahraga. Dari hasil penelitian tersebut  dapat  disimpulkan, bahwa (1) Terdapat  korelasi positif antara  Prokrastinasi dengan minat berolahraga peserta  didik putra kelas X  SMK Negeri 3 Kintamani, tahun pelajaran 2020/2021. (2) Terdapat  korelasi  negatif antara game online dengan minat berolahraga  peserta  didik putra kelas X  SMK Negeri 3 Kintamani, tahun pelajaran 2020/2021. (3)  tidak terdapat korelasi media sosial dengan minat berolahraga peserta didik putra kelas X  SMK Negeri 3 Kintamani tahun pelajaran 2020 / 2021  dan  (4) terdapat  korelasi positif prokrastinasi, game online, dan  media sosial secara bersama-sama dengan minat berolahraga  peserta didik putra kelas X SMK Negeri 3 Kintamani tahun pelajaran 2020/2021.  Disarankan kepada guru atau pendidik, agar mengetahui pentingnya  menangani masalah prokrastinasi, game online, media sosial dan minat berolahraga peserta didik, demi terciptanya proses belajar dan tercapainya tujuan pendidikan nasional. Diharapkan sekolah mampu mengambil suatu kebijakan dalam mengatasi permasalahan  dalam  peningkatan  minat berolahraga peserta didik.
An Exploration of Doping in Recreational Welsh Rugby An Ethical Analysis of Policy Responses
Authors:   , Cox Luke T.J.
Published: October 2021

Doping is widely misperceived as a problem limited to elite athlete populations. Yet evidence for the occurrence of doping at recreational levels can be found from a variety of sources across a range of sports. Understanding this phenomenon is made problematic because of the difficulties in accessing these athletes. The ambiguity in motivations for doping at this level has led researchers and policy makers to consider whether the problem is more one of public health rather than simply performance-related cheating in sport. This thesis explores the motivations, knowledge, perceived harms, perceptions of anti-doping policy, and the drug use practices of recreational Welsh rugby players, where prevalence is disproportionately high in the UK. Semi structured interviews with recreational Welsh rugby players (n=13) and gym users (n=9) from the South and West Wales region were conducted. Four key themes emerged: (i) the use of doping substances for aesthetic reasons; (ii) a concern for body image that can trigger doping; (iii) a range of problematic risk-taking behaviours; and (iv) lack of concern for anti-doping policy and practice. Given the harms associated with doping, attention was paid to the problem of identifying whether the primary policy response should be driven by health or sport organisations. An alternative policy response within harm reduction is here considered, adapting a contentious framework from the ethics of self-harm. Three broad alternative policy proposals are critically presented in relation to doping in recreational sport: (1) to prevent it; (2) to allow it; and (3) to supervise it. Each model is rejected. Due to the seriousness of the harms associated with doping and the public health threat, it is argued that public health bodies must provide specialist harm reduction for recreational athletes and gym users within Wales, to better protect the health of recreational athletes and the general public.
Exploring nutrient and energy intake in infants weaned using a baby-led or traditional feeding style
Authors:   , Rowan Hannah
Published: October 2021

Baby-led Weaning (BLW), where infants self-feed whole foods rather than being spoon fed pureed foods, has grown in popularity over the last decade. Proponents of the method believe that BLW improves weight trajectories and food acceptance due to the infant being in control of how much they eat and the focus on whole family foods, but there has been sparse research on the efficacy of the method, raising concerns amongst health professionals and impeding the support offered to families. The majority of the research conducted has focussed on weight trajectories, with most conducted outside of the UK. Therefore, using four studies, the aim of this thesis was to examine energy and nutrient intake amongst infants aged 6– 12 months following a baby-led versus spoon-feeding approach. The first study used an open-ended questionnaire to explore the experiences and concerns of 68 UK health professionals around BLW. Nutrient intake and eating behaviour was then compared for infants following BLW and spoon-feeding in 3 studies. The second (n=297) utilised a questionnaire to compare food intake, preferences and eating behaviours. The third (n=180) compared a 24 hour recall, while the fourth (n = 71) analysed detailed nutrient and energy intake using a three day weighed food diary. Overall, BLW infants were perceived to have greater satiety responsiveness and food acceptance. They consumed a wider variety of vegetables and protein rich foods and ate fewer commercial products. Differences were more pronounced at the start of weaning, with BLW infants having a more gradual transition to solid foods. Notably no difference in consumption of iron rich foods was found with iron intake below recommendations in both groups. The research does have limitations but suggests that BLW can provide sufficient energy and nutrient intake and may be a way of fostering positive eating behaviour.
Use of Data Mining in the prediction of risk factors of Type 2 diabetes mellitus in Gulf countries
Authors:   University Mohammed First, Faculty of Sciences, Oujda, Morocco, Boutayeb W. , Badaoui M. ,   University Mohammed First, Highest School of Technologies, Oujda, Morocco, Al Ali H. ,   Emirates Aviation University, Dubai, United Arab Emirates, Boutayeb A. ,   University Mohammed First, Faculty of Sciences, Oujda, Morocco, Lamlili M. ,   University Mohammed First, Faculty of Sciences, Oujda, Morocco
Published: October 2021

Prevalence of diabetes in Gulf countries is knowing a significant increase because of various risk factors, such as: obesity, unhealthy diet, physical inactivity and smoking. The aim of our proposed study is to use Data Mining and Data Analysis tools in order to determine different risk factors of the development of Type~2 diabetes mellitus (T2DM) in Gulf countries, from Gulf COAST dataset.
Image retrieval using Nash equilibrium and Kalai-Smorodinsky solution
Authors:   LIMSAD, FSAC, Hassan II University of Casablanca, Casablanca, Morocco, Elmoumen S. , Moussaid N. ,   LMA, FSTM, Hassan II University of Casablanca, Mohammedia, Morocco, Aboulaich R. ,   LERMA, EMI, Mohammed V University Rabat, Morocco
Published: October 2021

In this paper, we propose a new formulation of Nash games for solving a general multi-objectives optimization problems. The objective of this approach is to split the optimization variables, allowing us to determine numerically the strategies between two players. The first player minimizes his function cost using the variables of the first table P and the second player, using the second table Q. The original contribution of this work concerns the construction of the two tables of allocations that lead to a Nash equilibrium on the Pareto front. The second proposition of this paper is to find a Nash Equilibrium solution, which coincides with the Kalai--Smorodinsky solution. Two algorithms that calculate P, Q and their associated Nash equilibrium, by using some extension of the normal boundary intersection approach, are tried out successfully. Then, we propose a search engine to look for similar images of a given image based on multiple image representations using Color, Texture and Shape Features.
Hemivariational inverse problem for contact problem with locking materials
Authors:   Sultan Moulay Slimane University, Lab MATIC, FP of Khouribga, Morocco, Faiz Z. , Baiz O. ,   Ibn Zohr University, FP of Ouarzazate, Morocco, Benaissa H. ,   Sultan Moulay Slimane University, Multidisciplinary Research and Innovation Laboratory, FP of Khouribga, Morocco, El Moutawakil D. ,   Sultan Moulay Slimane University, Lab MATIC, FP of Khouribga, Morocco
Published: October 2021

The aim of this work is to study an inverse problem for a frictional contact model for locking material. The deformable body consists of electro-elastic-locking materials. Here, the locking character makes the solution belong to a convex set, the contact is presented in the form of multivalued normal compliance, and frictions are described with a sub-gradient of a locally Lipschitz mapping. We develop the variational formulation of the model by combining two hemivariational inequalities in a linked system. The existence and uniqueness of the solution are demonstrated utilizing recent conclusions from hemivariational inequalities theory and a fixed point argument. Finally, we provided a continuous dependence result and then we established the existence of a solution to an inverse problem for piezoelectric-locking material frictional contact problem.
RBF collocation path-following approach: optimal choice for shape parameter based on genetic algorithm
Authors:   Hassan II University of Casablanca, LIMAT Laboratory, Faculty of Sciences of Ben M’Sik, LIMAT Laboratory, Morocco, Saffah Z. , Hassouna S. ,   Hassan II University of Casablanca, National Higher School of Arts and Crafts (ENSAM Casablanca), 20670 Casablanca, Morocco, Timesli A. ,   Hassan II University of Casablanca, National Higher School of Arts and Crafts (ENSAM Casablanca), 20670 Casablanca, Morocco, Azouani A. ,   Sultan Moulay Slimane University, National School of Applied Sciences of Khouribga, LIPIM Laboratory, Morocco; Freie Universität Berlin, Institut für Mathematik I, Arnimallee 7, 14195, Berlin, Germany, Lahmam H. ,   Hassan II University of Casablanca, LIMAT Laboratory, Faculty of Sciences of Ben M’Sik, LIMAT Laboratory, Morocco
Published: October 2021

This paper presents a new method to solve a challenging problem and a topic of current research namely the selection of optimal shape parameters for the Radial Basis Function (RBF) collocation methods in both interpolation and nonlinear Partial Differential Equations (PDEs) problems. To this intent, a compromise must be made to achieve the conflict between accuracy and stability referred to as the trade-off or uncertainty principle. The use of genetic algorithm and path-following continuation allows us on the one hand to avoid the local optimum issue associated with RBF interpolation matrices, which are inherently ill-conditioned and on the other side, to map the original optimization problem of defining a shape parameter into a root-finding problem. Our computational experiments applied on nonlinear problems in structural calculations using our proposed adaptive algorithm based on genetic optimization with automatic selection of the shape parameter can yield more accuracy and a good precision compared to the same state of the art algorithm from literature with a fixed and given shape parameter and Finite Element Method (FEM).
Comparative Analysis of the Concepts of Safety Culture at Work
Authors:   Ufa State Petroleum Technological University, Vadulina N.V. , Litvinova V.I. ,   Ufa State Petroleum Technological University, Konstantinova O.V. ,   Ufa State Petroleum Technological University, Ismagilov M.I. ,   Ufa State Petroleum Technological University, Ismatov Zh.F. ,   Tashkent State Technical University named after Islam Karimov
Published: October 2021

The main concepts of safety culture at work and the problems of their adaptation to specific conditions at the enterprises of PJSC LUKOIL and PJSC SIBUR Holding are considered. Safety culture is a broad concept that includes a set of knowledge, beliefs, moral values, habits, skills, as well as a set of legislative and normative acts. Individual elements of a safety culture can be implemented in various combinations. However, not all the organizations have a specific concept for implementing safety culture programs in their workplaces. In this regard, the study of the efficiency of the activities of the enterprises of PJSC LUKOIL and PJSC SIBUR Holding was conducted to improve the culture of occupational safety. The dynamics of incidents and its dependence on the introduced measures for the implementation of programs for the culture of safety at work were assessed. The objectives of this work are to establish afore-mentioned dependence at work, as well as to identify the best practices for introducing an occupational safety culture. The causes of injuries and their relationship with the safety culture at work, as well as the influence of individual tools of this culture on the frequency and severity of incidents are considered. It is established that the use of only informational tools, as is done at many Russian enterprises, does not reduce injuries. Simple information does not lead to an improvement in occupational safety and efficiency of the enterprise, and sometimes even causes the opposite effect. The most promising and efficient tool for the occupational safety culture is the assessment of occupational risks, i.e., identification of incidents that potentially lead to injury or incident. The conducted analysis of the implementation of various programs on the culture of occupational safety will help enterprises to choose the concept of safety culture that is optimal for themselves and, as a result, reduce the level of work injuries.
Wired and Cable Networks of Fire-hazardous Zones
Authors:   FGBU VNIIPO EMERCOM of Russia, Smelkov G.I. , Pekhotikov V.A. ,   FGBU VNIIPO EMERCOM of Russia, Ryabikov A.I. ,   FGBU VNIIPO EMERCOM of Russia, Nazarov A.A. ,   FGBU VNIIPO EMERCOM of Russia
Published: October 2021

The urgency of the issue to be considered is conditioned by the high fire hazard of electric cables of the voltage up to 1000 V. As a result of fires associated with this type of products at the industrial and storage units in 2020 in Russia, the volume of direct loss exceeded 68 % comparing to the fires caused by all other types of cable lines occurred at enterprises. The high fire hazard of industrial facilities is mainly associated with numerous fire-hazardous premises containing combustible media capable of inflammation under the impact of ignition sources. In order to reduce their fire hazard, two independent and mutually reinforcing systems of fire-hazardous premise classification applied at designing such units are developed: Identification of fire-hazardous zone’s class to ensure correct selection of electric equipment and level of its fire-protection. Categorization of buildings and premises as fire-hazardous to ensure fire protection for both for buildings and attending employees. The main regulatory document where the requirements to fire-hazardous zone classification and selection of relevant fire-protected equipment were initially stipulated is the Rules for electric installations (1980). In 2008, the updated version of the Rules was incorporated into the text of the Federal Law of June 22, 2008 № 123-FZ «The technical regulation on fire safety requirements». The studies conducted by the experts of The Federal State Budgetary Establishment «All-Russian Research Institute for Fire Protection of the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters» of Russia serves as a basis to develop normative documents regulating categorization of fire-hazardous premises and classification of fire-hazardous zones as well as the recommendations on the scope of application of some electric equipment in fire-hazardous zones. The adopted classification of fire-hazardous zones is unique and has no analogues in global practices.
Scientific infrastructure of social sciences and humanities in European Union
Authors: Antopolskiy A. B.
Published: October 2021

The concept of scientific infrastructure in the interpretation adopted in the European Union is considered. It is indicated that this is a modern form of organization of scientific information services. The structure of European organizations and projects forming the scientific infrastructure of European organizations is described. The activities of European consortia of scientific infrastructure of social and humanitarian profile, including information resources and services implemented in these consortia, are described in particular detail. It is concluded that the European experience can be very useful for the development of scientific information services in Russia.
Scientific Reviews in Web of Science Core Collection Data Base
Authors: Glushanovskiy A. V.
Published: October 2021

Scientific reviews are a publications type, which is very important for the world scientific community. This article considers reviews positions in the world publication flow (within the database «Wed of Science Core Collection» (WoS CC) array) for six natural sciences research areas (physics, chemistry, mathematics, geology, biology, computer science) during the period 2010–2019 for the leading countries of the world and Russia. The article considers additionally this type documents citation specialties depending on the research area.

By means of the WoS CC database, bibliometric parameters of publication flows of scientific reviews for the six mentioned research natural sciences areas were determined: the number of records, it’s percentage in the total publication flow, the place of Russian reviews in the world flow, the average citation rate, the proportion of not cited records, the period of active citation. The dynamics of changes for these parameters over time (2010–2019) is considered.

The article establishes the following features of scientific reviews, as a specific publication type:

the percentage of reviews in both the world and Russian information flow is relatively small, it significantly depends on the research area, but over time it increases for all research areas;

the trends of changes for the Russian reviews flow over time and in all research areas, follows world trends;

Russian reviews occupy places, in terms of quantity, from 6–9 to a place in the fifth ten in the world array of WoS CC documents (depending on the year and research area), but they show a large spread in average citation terms. Sometimes, Russian reviews average citation is approaching and even exceeds the world average citation for some years and some research areas (and sometimes significantly);

the non-cited reviews publications share is significantly lower than even for articles (the most cited type of publications);

the reviews active citation period reaches 9–10 years and is significantly longer than (from some publications opinion) for scientific publications in general.
Региональные особенности эколого-экономического развития аграрного сектора экономики
Authors: Батыров Владимир , Курасов Владимиир , Камбулов Сергей
Published: October 2021

Данная статья посвящена исследованию региональных особенностей эколого-экономического развития аграрного сектора экономики. Показано, что существующие основы развития отечественного аграрного сектора во многих случаях ограничены, в определенной степени устаревшие, не соответствуют современному методологическом трактовке их сущности и экономической целесообразности, недостаточны с точки зрения методических приемов в практике ведения системы аграрного хозяйствования, не всегда учитывают прогрессивный опыт экономически развитых стран, в частности европейский как наиболее приемлемый для отечественной аграрной культуры. Такие подходы требуют расширенной научной дискуссии, широкого обсуждения с целью повышения действенности научно-практических наработок в данной сфере.
THE BENEFITS AND CHALLENGES OF SOCIAL MEDIA IN CONSTRUCTION INDUSTRY: A PERSPECTIVE FROM CONSTRUCTION PROFESSIONALS
Authors: Mohd Noor Siti Nur Aishah Binti , Mohd Syed Jaafar Nur Syarifah Syahirah , Amri Ramly Mohd Khairul
Published: October 2021

In recent years, internet usage and social media have been widely used in Malaysia, the construction industry is one of the industries that are not excluded from this technological trend. This research intended to identify the benefits and challenges of social media in the construction industry among the construction professionals particularly in the northern region area. To identify the usage, the benefit and challenges of social media were also determined in the construction industry whereby it also reflects how far construction professionals rely on social media in their daily works. This research uses quantitative approach in order to collect data via questionnaires distribution from construction professionals.  The results revealed that, most of the construction companies agreed that social media provides more advantages and benefits than challenges in the construction industry. This research provides significant data for construction professionals regarding the effectiveness of social media platform particularly in disseminating information for daily communication in construction projects.
A casa como laboratório na arquitetura paulista: Vilanova Artigas (1953-1959) | The house as laboratory of paulista architecture: Vilanova Artigas (1953-1959)
Authors: Nogueira Geovana Gea , Alves André Augusto de Almeida
Published: October 2021

As transformações ocorridas na sociedade brasileira no segundo Pós-Guerra são marcadas pela relação dialética entre o arcaico e o moderno. Nesse con­texto, Vilanova Artigas cria, por meio da experi­mentação em uma série de casas projetadas entre 1954 e 1959, uma nova arquitetura para uma nova sociedade.
Modelos e sistemas migratórios contemporâneos na América Latina
Authors: Vedovato Luís Renato , Nagao Menezes Daniel Francisco
Published: October 2021

A mobilidade intra-regional é uma característica das sociedades latino-americanas e caribenhas, mas sua importância cresceu significativamente desde o final do século XX. A teoria dos sistemas migratórios, primeiro ao nível da mobilidade interna e depois aplicada às migrações internacionais, tem mostrado que os sistemas migratórios são constituídos por países (ou locais dentro de diferentes países) que trocam quantidades relevantes de migrantes e têm sistemas de feedback que conecta a mobilidade das pessoas com fluxos de remessas, bens, representações, ideias e informações. Assim, a evolução e transformação dos sistemas migratórios se insere em um processo mais amplo de mudanças políticas, econômicas e sociais nos países ou regiões que os integram. O objetivo do trabalho é analisar a evolução dos sistemas de migração da América Latina e do Caribe no período 1990-2017. Para tal, através do exame de fontes documentais e estatísticas, o processo pelo qual os sistemas migratórios assumiram novas características, incorporaram novas ligações, alteraram os seus pólos de origem e atração ou tornaram mais complexa a sua dinâmica, dependendo do contexto econômico e político do país ou região, mas também como resultado de motivações sociais, conflitos e níveis de violência e fatores ambientais.
Финансирование проектов по внедрению возобновляемых источников энергии в Китае и Индии
Authors:   Магомедов Т. Р., Морозов В. В.
Published: October 2021

В условиях нестабильной геополитической ситуации и высокой волатильности на рынках углеводородов развивающиеся страны ещё больше ощущают зависимость от стран-экспортёров энергоресурсов. Парижское соглашение, пришедшее на смену киотскому, обязывает все государства принимать меры по сокращению выбросов парниковых газов в атмосферу и разрабатывать программы перехода на безуглеродную экономику. этой ситуации развивающиеся страны АТР оказались в сложном положении: промышленность в данном регионе использует только традиционные виды топлива, и, как следствие, процесс перехода на возобновляемые источники энергии (ВИЭ) для таких стран будет ознаменован ситуацией, когда нужно сохранить темпы экономического роста, занятость и уровень благосостояния граждан, но при этом осуществлять «энергетическое перевооружение» реального сектора промышленности.
Ключевые слова: энергоресурсы, возобновляемые источники энергии (ВИЭ), энергетическое перевооружение, финансирование, Китай, Индия, инвестиции, декарбонизация, развитие инфраструктуры, экономический рост, экономика, социально-экономические проблемы, проект Frontrunner, правительственные стимулы, труднодоступные регионы, стоимость электроэнергии, Азиатско-Тихоокеанский регион, «зелёная» энергия, торговая война, установленная мощность ВИЭ
АВТОНОМИЯ, ИСТОРИОГРАФИЧЕСКИЕ АЛЬТЕРНАТИВЫ
И ИДЕОЛОГИЧЕСКАЯ БОРЬБА
В ИСТОРИЧЕСКОЙ НАУКЕ «ЗРЕЛОГО СТАЛИНИЗМА»
Authors: Тесля А.А.
Published: October 2021

В статье рецензируется книга екатеринбургского историка Михаила Киселева, посвященная формированию и развитию исторических и историко-правовых взглядов советского историка Б.И. Сыромятникова в контексте устройства исторического сообщества и научной коммуникации внутри
него в эпоху «зрелого сталинизма».
Ключевые слова: историография, история права, советская историческая наука, петровские реформы
В.В. РОЗАНОВ И К.Н. Леонтьев
Authors: Пишун С.В.
Published: October 2021

В статье предпринята попытка сопоставить взгляды В.В. Розанова и К.Н. Леонтьева на некоторые вопросы общественной и культурной жизни, показана
сложность и неоднозначность их отношения к творчеству отдельных русских философов и писателей. Автор прослеживает историю заочного знакомства В.В. Розанова и К.Н. Леонтьева, выявляет ряд аспектов, обсуждение которых оживило их переписку.
Ключевые слова: В.В. Розанов, К.Н. Леонтьев, русская философия, эстетизм, красота, византизм