bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK ELEKTRONIK (E-LKPD) MENGGUNAKAN MODEL PEMBELAJARAN INKUIRI PADA POKOK BAHASAN FLUIDA STATIS KELAS XI SMA TAHUN PELAJARAN 2020/2021
Authors: Wahyuni Yayu 
Published: June 2022

Penelitian ini bertujuan untuk: (1) Menghasilkan produk E-LKPD Fisika menggunakan model inkuiri, (2) Mengetahui kelayakan serta respon peserta didik terhadap Lembar Kerja Peserta Didik Elektronik (E-LKPD) Fisika menggunakan model inkuiri pada pokok bahasan fluida statis kelas XI di SMA PIRI 1 Yogyakarta. Jenis penelitian yang digunakan ini adalah penelitian dan pengembangan atau R&D (Research & Development) menurut pengembangan yang digunakan oleh Sugiyono untuk menghasilkan produk bahan ajar. Tahapan yang digunakan hanya 8 tahap yaitu meliputi potensi dan masalah, pengumpulan informasi, desain, validasi produk, revisi, ujicoba produk, revisi produk dan produk akhir. Subjek penelitian ini terdiri dari 3 validator ahli Fisika dan 15 orang peserta didik. Analisis data yang dilakukan dengan mengumpulkan data kualitatif dan kuantitatif untuk uji kelayakan dan ujicoba keterbacaan peserta didik menggunakan statistika deskriptif. Hasil uji validasi oleh tiga validator ahli terhadap E-LKPD yang dikembangkan dengan persentase rata-rata diperoleh sebesar 48,1% pada kriteria baik, dan 51,9% pada kriteria sangat baik. Sedangkan hasil respon peserta didik pada ujicoba keterbacaan E-LKPD, persentase rata-rata sebesar 4,0% pada kriteria tidak setuju, 64,4% pada kriteria setuju, dan 31,6% pada kriteria sangat setuju.
Kata Kunci: berisi istilah penting dan substansi artikel, dapat mempermudah pembaca untuk menemukan artikel, jumlah 3-5 istilah, serta ditulis di bawah abstrak dicetak tebal dan miring.
PENINGKATAN KETERAMPILAN MEMBACA PEMAHAMAN MENGGUNAKAN METODE PQ4R SISWA KELAS VB SD NEGERI 1 GEMAWANG
Authors: Finiza Ratih Trias , Rezkita Shanta , Wardani Haning Susilo 
Published: June 2022

Keterampilan membaca pemahaman sangat penting bagi siswa. Berdasarkan hasil observasi dan wawancara menunjukkan bahwa siswa kesulitan memahami suatu bacaan. Tujuan penelitian ini adalah untuk menguji peningkatan keterampilan membaca pemahaman dengan menggunakan metode PQ4R pada siswa kelas VB di SD Negeri 1 Gemawang. Jenis penelitian ini adalah Penelitian Tindakan Kelas (PTK) yang terdiri dari dua siklus. Peningkatan ini terlihat dari nilai rata-rata pemahaman pada siklus I sebesar 64,8 pada kategori baik dan meningkat pada siklus II menjadi 74,03 pada kategori baik. Hasil di atas diperkuat dengan hasil observasi aktivitas belajar siswa. Nilai rata-rata persentase pada siklus I adalah 65,76% dalam kategori baik dan meningkat pada siklus II menjadi 72,49% dalam kategori baik. Hasil analisis menyimpulkan bahwa penggunaan metode PQ4R dapat meningkatkan keterampilan membaca pemahaman siswa VB di SD Negeri 1 Gemawang. Berdasarkan hasil tersebut, penggunaan metode PQ4R dapat digunakan untuk penelitian selanjutnya dengan harapan dapat berfungsi sebagai pemecahan masalah dalam pembelajaran di sekolah dasar.
Kata kunci: metode PQ4R; Pemahaman membaca; bahasa Indonesia
Persepsi Guru Terhadap Perlindungan Hukum Dalam Proses Belajar Mengajar di Sekolah
Authors: Florentina Nining Hastiani  
Published: June 2022

Sekolah sebagai tempat proses transformasi pengetahuan dan juga untuk belajar berperilaku yang sesuai dengan norma norma, dimana guru atau pendidik merupakan perantaranya. Tugas dan tanggung jawab mereka tidaklah ringan, karena sebagian besar waktu belajar siswa dihabiskan di sekolah. Sedangkan rata rata satu guru harus menghadapi kurang lebih 20-30 siswa dalam waktu yang bersamaan, dengan berbagai macam karakter siswa. Tujuan dalam penelitian ini untuk mengetahui persepsi para guru terhadap perlindungan hukum yang mereka dapatkan selama proses belajar mengajar. Metode penelitian yang digunakan adalah metode kuantitatif deskriptif dengan subyek penelitian guru sebanyak 135 orang dengan kriteria pengajar aktif di level TK hingga SMA yang ada di Indonesia. Hasil analisis dari penelitian ini menunjukkan bahwa terdapat 73 orang atau 54% dari total responden yang mempunyai persepsi positif, dan 62 orang atau 46% mempunyai persepsi negatif terhadap perlindungan hukum selama proses belajar mengajar. Artinya proporsional guru yang mempunyai persepsi negatif mendekati separuh dari total responden. Hal ini menunjukkan bahwa masih banyak yang merasa khawatir terhadap perlindungan hukum pada saat mendisiplinkan siswa. Pihak pihak terkait sekolah hendaknya menaruh perhatian pada masalah ini dimana tetap menjaga keseimbangan antara peran guru dalam mendidik dengan cara cara mendidik yang mempertimbangkan hak asasi anak dan hukum.
PENGEMBANGAN MODEL PEMBELAJARAN DIGITAL INTELEGENT TUTORING SYSTEM
Authors: Muhammad Yusuf  , Andi Cici Thania  , Maulida Sari Harahap  , Marito Ritonga  
Published: June 2022

Intelligent Tutoring System (ITS) merupakan aplikasi komputer yang memiliki Artificial Intelligence. Salah satu keunggulan ITS dibandingkan pengajaran konvensional adalah karena ITS menggunakan pendekatan one-to-one antara ITS dengan mahasiswa. Pembelajaran di kelas tidak efektif bila pemahaman antar siswa tidak sama. ITS dapat menghilangkan kebosanan mahasiswa karena pengajaran ITS lebih bersifat individual dan fokus langsung pada pokok permasalahan. Tujuan dari artikel ini adalah untuk mengetahui bagaimana model pembelajaran Intelligent Tutoring System diterapkan di sekolah. Metode dalam penelitian ini adalah metode studi kepustakaan dengan pendekatan kualitatif dengan mengkaji konsep-konsep yang terkait dengan Model ITS. ITS membantu mahasiswa memahami suatu materi dan dapat mengulang materi secara berulang-ulang hingga menguasai materi tersebut. Model ini merupakan bantuan akademik atau bimbingan belajar oleh tutor kepada siswa untuk membantu kelancaran proses belajar mandiri siswa secara individu atau kelompok yang berkaitan dengan bahan ajar. Untuk dapat melaksanakan one-to-one teaching, model ITS harus mampu mengenali mahasiswa tersebut dan membangun model mengenai tingkat pengetahuan, keterampilan dan keinginannya. Sistem harus dapat memberikan instruksi individu atau bahan ajar kepada siswa
Kata Kunci: Model Pembelajaran; Sistem Bimbingan Cerdas (ITS)
PENGGUNAAN GOOGLE CLASSROOM PADA PEMBELAJARAN KIMIA
Authors: Novrita Mulya Rosa  , Ahmad Suryadi  
Published: June 2022

Salah satu kebijakan pemerintah untuk memutus penyebaran Covid-19 adalah pembelajaran di sekolah dilakukan secara online. Dalam mengelola belajar mengajar jarak jauh, Learning Management System yang paling umum digunakan saat ini adalah Google Classroom. Penelitian ini bertujuan untuk mendeskripsikan pengaruh google classroom terhadap pembelajaran kimia siswa kelas III Program Studi Pendidikan Matematika FMIPA Universitas Indraprasta PGRI. Penelitian ini merupakan penelitian deskriptif dengan desain One Shot Case Study Subyek dalam penelitian ini adalah mahasiswa semester III yang sedang memprogram pelajaran kimia dasar Program Studi Pendidikan Matematika pada lingkup 70 orang di FMIPA Universitas Indraprasta PGRI. Instrumen yang digunakan dalam penelitian ini berupa tes hasil belajar dan persepsi siswa terhadap penggunaan lembar angket google classroom. Rata-rata skor hasil belajar siswa adalah 79,76 dalam kategori tinggi. Persentase nilai respon siswa sebesar 85,73% dengan kategori sangat baik. Hasil penelitian menunjukkan bahwa terdapat pengaruh yang signifikan terhadap hasil belajar siswa setelah menerapkan pembelajaran google classroom. Hal ini ditunjukkan dengan nilai thitung = 39.587 dengan p – value = 0,002.
Kata kunci: google classroom; pembelajaran kimia; hasil belajar
Manager’s Entrepreneurial Dynamic Capabilities as source of Sustained Competitive Advantage for Small and Medium Enterprises – Evidence from Emerging Economies in South Asia
Authors: Bokhari Syed Asad Abbas , Aftab Muhammad , Ali Murad 
Published: June 2022

<p> </p>
<p><strong>Abstract</strong></p>
<p><em>The ultimate purpose that entrepreneurs of small and medium enterprises should endeavor for is to achieve a sustained competitive advantage over their competitors. The objective of this study was to investigate the significance of, and emphasis put on dynamic, valuable, rare, inimitable, heterogenous, and non-substitutable managerial capabilities in their links with sustained competitive advantage for the firm. Overall, the findings demonstrated strong, substantial, and positive effects of dynamic capabilities on sustained competitive advantage, providing support, evidence, and substantiation to the resource-based view (RBV) of the firm. The standard multiple linear regression model accounted for 87.3 percent of the variation in sustained competitive advantage. In essence, the research findings not only extended to the literature on the correlation between dynamic capabilities and competitive advantage, but also presented critical information to both policymakers and experts on the subject.</em></p>
UPAYA PENCEGAHAN DAN PENANGANAN PENYAKIT DEGENARTIF PADA LANJUT USIA
Authors: Hidayah Nurul , Widiani Esti , Palupi Lingling Marinda , Rahmawati Ira 
Published: June 2022

Lansia merupakan penduduk berisiko tinggi untuk terjadinya berbagai macam penyakit degeneratif, antara lain asam urat, hipertensi, dan diabetes melitus. Kurangnya informasi dan pengetahuan lansia mengenai penyakit degeneratif, pola hidup sehat, dan pola pencegahan dini, merupakan penyebab utama tingginya angka kejadian komplikasi penyakit pada lansia. Tujuan kegiatan pengabdian masyarakat ini secara umum adalah untuk meningkatkan derajat kesehatan masyarakat melalui peningkatan pengetahuan lansia tentang penyakit degeneratif dan upaya pencegahannya di Desa Sumberporon. Metode kegiatan yang dilakukan pada kegiatan ini adalah ceramah dan diskusi. Dari hasil kegiatan penyuluhan yang telah dilaksanakan, dapat disimpulkan bahwa terjadi peningkatan pengetahuan lansia tentang penyakit asam urat, hipertensi, hiperkolesterol dan diabetes melitus di Desa Sumberporong. Selain itu terlihat pada antusias lansia dalam sesi diskusi dan tanya jawab menunjukkan bahwa rasa ingin tahu lansia terhadap kesehatannya cukup tinggi. Pengetahuan mengenai penyakit-penyakit degeratif ini sangat diperlukan agar lansia dapat secara mandiri menjaga kesehatannya
XRD and Rietveld Quantitative Phase Analysis of Radio Frequency Suspension Plasma Sprayed Nano-hydroxyapatite Powders
Authors: Kumar R. , Cheang P. , Khor K.A. , White T. 
Published: June 2022

Abstract
Ultra-fine hydroxyapatite powders were successfully synthesized using radio frequency (RF) suspension plasma spraying (SPS). This novel technique utilises the inherent characteristics of the RF plasma to axially feed and spheroidise a liquid suspension to produce spherical ultra-fine HA powders. This offers an alternative approach over conventional D.C. and flame spheroidising techniques which are better suited for solid feed stocks. Rietveld analysis was subsequently applied using Rietquan Quantitative Analysis software package to determine the amount of decomposed phases and amorphous content of the as-sprayed powder. This was also compared against quantitative XRD analysis employing internal and external standards. However, pure phases needed for calibration is scarce and amorphous calcium phosphate (ACP) is virtually impossible to isolate. In addition, the long and laborious task of obtaining calibration curves makes this technique unpopular. Nevertheless, conventional quantitative phase analysis (QPA) was carried out, using relative peak height ratios of HA and the phase involved, but the calculated decomposition only shows relative trends for a particular parameter variation. Determining the actual phase content is critical because of possible variations in biological responses when used as coatings and inserts in restorative orthopaedic implants. Varying tissue responses can arise from decomposed phases such as α and β-tricalcium phosphate (TCP) and tetra-calcium phosphate (TTCP) as well as ACP which generally have higher solubility as compared to crystalline. QPA via the Rietveld method provides a powerful tool that offers the user simultaneous quantitative phase determination of multiphase systems containing amorphous content. Unlike XRD QPA, the amorphous content could be indirectly calculated using crystalline alumina standard. XRD QPA results showed that decomposition generally rose with plate power without considering the amorphous content. With Rietveld QPA, the results showed an initial rise in decomposition before decreasing at higher plate powers. The amorphous phase content was calculated at different plate powers and concentration of suspension with the aid of alumina as an external standard. Results showed that the amorphous content increased substantially at higher powers. This study demonstrates the ability of Rietveld analysis to completely quantify all associated amorphous and crystalline phases within a multiphase system for any thermally treated material.
Thermal Shock Characteristics of Functionally Graded Thermal Barrier Coatings
Authors: Chia C.T. , Khor K.A. , Ng H.W. , Fu L. 
Published: June 2022

Abstract
The thermal shock resistance of thermal barrier coating depends strongly on the shear stress generated by the thermal expansion mismatch between the ceramic and bond coat layer. Applying a functionally graded structure composing of NiCoCrAlY and YSZ along the coating can mitigate this effect. The paper studied the improvement of thermal shock properties with different number of intermediate layers (2 - 4) added over the temperature cooling range 900 - 30 °C. Acoustic emission (AE) technique was utilised to determine the moment of occurrence of damage within the coatings, and thus help to identify the corresponding failure mechanisms. Cross section analysis of the coatings after thermal shock tests revealed that the coatings generally failed by two mechanisms: edge delamination and segmentation of zirconia topcoat. Failures in the coatings with 2 and 3 intermediate layers (total of 3 and 4 layers respectively in the overall coating) were dominated by edge delamination while the coating with 4 intermediate layers exhibited only segmentation of the top zirconia layer. This points to the fact that interfacial stresses were not critically affecting the integrity of the 5-layer coating (4 intermediate layers plus the ceramic top layer). The cumulative and rate energy results showed that the energy released by the coatings during the thermal shock tests were in the order of 3-layer coating &gt; 4-layer coating &gt; 5-layer coating. The 5-layer coating had demonstrated the best thermal shock resistance among the four coatings.
Optimization of Shop Practices for Thermal Barrier Coatings
Authors: Sahoo P. 
Published: June 2022

Abstract
The desire to enhance the performance and efficiency of gas turbine engines has led to higher engine operating temperatures. To accommodate these higher temperatures, new superalloys and material systems have been developed, along with novel cooling techniques. However, with operating temperatures exceeding the acceptable maximum metal temperatures, thermal barrier coatings (TBC) are used for underlying metal surface protection. This paper reviews the art and technology of air plasma sprayed TBC coatings onto hot section components from a job shop perspective. The specification for such coatings and its practical implications are discussed. The issues in applying such coatings will be discussed, along with references to manufacturing issues on the shop floor. The difficulties inherent m applying a line-of-sight coating to complex geometry will be discussed, with particular reference to automated or robotic spraying. The utility of using a design-of-experiment approach to satisfy the user will be reviewed. Data will be presented to show the economic impact of process optimization.
Processing and Characterization of Nanostructured Cermet Coatings
Authors: Marple B.R. , Voyer J. , Bisson J.F. , Moreau C. 
Published: June 2022

Abstract
Thermal spraying of a nanograined WC-12Co cermet powder using high velocity oxy-fuel was employed to produce nanostructured coatings. The spray conditions were varied by employing a wide range of thermal spray parameter settings and using either hydrogen or propylene as fuel gas. By determining the characteristics of the spray jet for each set of spray conditions and by studying various aspects of the coatings, including the microstructure, properties, and performance in dry abrasion tests, conclusions were drawn regarding the effect of the spray parameters on the properties and performance. When comparing the effect of using hydrogen or propylene as fuel on in-flight particle characteristics, the results indicated that, for a given particle temperature, the particle velocity tended to be higher with hydrogen than propylene. As well, it was found that the coatings produced using hydrogen tended to have a higher microhardness and a lesser degree of carbide degradation. The resistance to wear in dry abrasion was significantly higher for coatings produced using hydrogen as fuel. For both series of coatings, it was found that the abrasion resistance increased with the particle temperature at the point of impact during thermal spraying and with the hardness of the coating. The abrasion resistance of coatings produced using propylene appeared to be much more sensitive to changes in hardness. For the thermal spray system studied in this work, the results indicate that nanostructured WC-12Co coatings having a maximum abrasion resistance are obtained by using hydrogen as fuel under conditions such that the particles achieve temperatures above approximately 1850-1900°C and a speed greater than 575-600 m/s.
Synthesis and Properties of Muitimodal WC-12 Co Coatings
Authors: Ajdelsztajn L. , Lavernia E.J. , Bastian F.L. , Skandan G. 
Published: June 2022

Abstract
WC-Co has been extensively investigated for use in wear resistant coatings for engineering applications. In principal, when the WC particle size decreases in the starting powder, the decomposition of WC increases, and therefore, significant amounts of W2C and W3C, and even metallic phases, are observed in nanocrystalline WC-Co coatings. The reported increase in hardness of nanostructured materials is generally attributed to the significant decrease in grain size or particle size. However, the presence of brittle, non-WC phases in nanostructured WC-Co coatings leads to sliding and abrasive wear by removal of large plates of the coating. Concurrently, the greater degree of decomposition suffered by the nanostructured powder during spraying leads to a reduction in the volume fraction of the wear-resistant primary WC phase. For the reasons presented above, the present efforts are directed towards the synthesis of a wear-resistant coating using a multimodal WC size distribution of particles in the starting powder. The multimodal distribution is characterized by small WC particle(~50 nm) and coarse WC particles (1.7µm). In addition, the distribution of Co also spanned an order of grain size, hence the name multimodal. The coatings were deposited using HVOF technology.
Technique and Application of High Velocity Arc Spraying
Authors: Wang H. , Zha B. , Su X. , Yang H. , Wang L.-Y. 
Published: June 2022

Abstract
The paper presents the basic principle and application of High Velocity Arc Spraying technique. Through adopting convergent-divergent nozzle, air circulation cooling and computer aided design technique, particle velocity was enhanced, which surpasses velocity of sound, and atomization effect was improved, so HVAS fabricated high quality coating. Experiment results show that HVAS has high particle velocity, high atomization effect, high bond strength and low porosity. Average velocity of atomized Aluminum particle is 373m/s. Bond strength, porosity and average particle size of 3Cr13 coating are 60MPa, 0.9% and 4.32 m respectively. For high coating quality, HVAS is widely used in maintenance, corrosion resistance and surface strengthening.
Process Features During the Plasmajet CVD Synthesis of Si-C-N Coatings
Authors: Wilden J. , Wank A. 
Published: June 2022

Abstract
Materials in the system Si-C-N feature excellent properties for wear and corrosion protection applications even at elevated temperatures and an excellent thermal shock resistance among the ceramics. As these materials have no melting point, they cannot be processed purely by conventional spraying techinques, but need to be synthesized. Plasmajet CVD processes with single and triple DC torches and HF torches with supersonic nozzles have successfully been applied to produce Si-C(-N) coatings on different steel, aluminum, titanium and copper alloys as well as on graphite. Various liquid single precursors with suitable structure have been tested and evaluated with regard to the morphology and structure of the produced coatings. The processes are compared taking into account their characteristics concerning the injection modes, gas temperature and velocity profiles. Emission spectroscopy is used to determine the mechanisms of the coating formation. Guidelines for the optimum production of Si-C(-N) coatings by Plasmajet CVD are deducted.
In situ Structural Modification of Thermal Spray Grey Alumina Coatings Implementing Laser Ablation
Authors: Montavon G. , Verdier M. , Coddet C. 
Published: June 2022

Abstract
Thermal spray deposits are built layer by layer following several passes of the spray gun in front of the part to be coated. Between each pass, dusts from the surrounding atmosphere and condensed vapors are deposited and hence blur the surface onto which the following layer will be formed; these phenomena weaken the deposit cohesion and lead in the same time to the formation of pores and others stacking defaults. To circumvent such a problem and to improve the deposit overall quality, in situ laser ablation was performed during the coating manufacturing. The ablation stage occurred between each pass. This paper presents at first the experimental device and the major considered processing parameters. Among those, energy density is one of the most critical. It then investigates the structural modifications and the induced improvements obtained for grey alumina coatings considering principally the deposit cohesion and the porosity level.
Formation of Hard Surfacing Layers Using Powder and an Electron Beam
Authors: Morimoto J. , Tomie M. , Kuriyama F. , Abe N. 
Published: June 2022

Abstract
Hard surfacing layers of WC-Co/Ni-based self-fusing alloy (SFA), Ni-based SFA and Cr3C2-NiCr alloy were formed using powder and an electron beam. When the layers were examined using the Vickers hardness test, a sand erosion test and an immersion corrosion test, they were found to display high erosion and corrosion resistance. The WC-Co/Ni-based SFA, Ni-based SFA, and Cr3C2-NiCr alloy layers displayed high hardness of 1400HV, 780HV and 900HV, respectively.