bluuebunny/crossref_metadata_2025_split huggingface dataset:
Classic design of a kaplan turbine runner wheel
Authors: Bottlender Pedro Henrique Melo , Demarco Giuliano , Dos Santos César Gabriel dos 
Published: January 2023

The Brazilian electric matrix is based on renewable sources of energy, and most of it comes from hydroelectric power plants, its structure is composed of a dam, a capture system, a spillway, and a powerhouse, in this installation are the water turbines The main types are Francis, Bulbo, Helix, Kaplan, and Pelton each one has particularity for dimensioning. In this context, the objective of the article is to carry out the classic design of a Kaplan turbine runner wheel and the computational design. For this, first, the runner wheel case study was defined considering those installed in Brazil, using as criteria the power energy efficiency. Later, based on the input data: flow, fall height, and runner rotation, the calculation memorial was developed, preliminary calculations to define the specific rotation, complementary calculations to determine the minimum runner flow, number of poles, specific design rotation, an outer diameter of the runner blade, hub diameter, the height of the distributor, solid shaft diameter, fluid flow velocity, profile lengths, and profile thickness. The Hydroelectric Power Plant case study was Luis Eduardo Magalhães, installed on the Tocantins River in the state of Tocantins, has five generator units with Kaplan runners of five blades and power of 180.5 MW each, the flow rate of 700 m³/s, drop height of 29 m and 100 revolutions per minute. The values obtained were organized in electronic spreadsheets and later the computational design of the runner was performed using CAD software. The dimensioned runner wheel has dimensional and power values similar to the case study. Thus, it is concluded that the application of the classic dimensioning allowed the design of the runner wheel containing five blades and power of 183.4 MW, and the computational design allowed us to visualize the similarities with the case study.
Caracterización de almidones obtenidos de fuentes alternativas
Authors: Arreola María Martha Sandoval , Álvarez Elizeth Ramírez , Barragán Montserrat Gaspar , Rodríguez Gerardo Ortiz 
Published: January 2023

El almidón es una de las materias primas más importante en la generación de plásticos biodegradables por lo que resulta de interés encontrar fuentes alternativas para su producción. En esta investigación se aíslan y caracterizan parcialmente diferentes almidones para establecer posteriormente correlaciones con sus propiedades plásticas. Se determinaron sus características morfológicas mediante microscopía electrónica de barrido. Los espectrogramas y el análisis elemental fueron obtenidos mediante la técnica de FTIR en el Centro de Investigación de Ingeniería Química de la Universidad Juárez Autónoma de Tabasco. Los gránulos, presentaron diferentes formas y tamaños, según la fuente del almidón. En los almidones de Solanum tuberosum (papa) Ipomea batata (camote morado) y Musa paradisiaca L (plátano macho), las formas detectadas fueron lenticular, esférica truncada y piramidal respectivamente. El almidón de maíz exhibió una forma poligonal. Los gránulos de almidón de plátano costillón, presentaron formas ovales, elipsoidales e irregulares con un tamaño promedio de 20 – 50 µm.. En el análisis elemental de los almidones se detectan como componentes principales C y O, además elementos trazas como: P, Fe, K, Cu y Zn. Los espectrogramas de los almidones en estudio reflejan comportamientos similares a los obtenidos del almidón de maíz. Las diferencias encontradas en los tamaños y distribución de los gránulos de almidón pueden resultar importantes en las propiedades viscoplásticas, así como de su reactividad.
Diálogos sobre o ensino médio: gestão social, desenvolvimento local e a sociedade civil em Itabirito/MG
Authors: Da Mota Denis José Donato , Magalhães Cláudio Márcio 
Published: January 2023

A Constituição Federal brasileira, no seu artigo nº 205, determina que todo brasileiro tem direito à educação básica, e que são deveres da família e do governo preparar o indivíduo para o convívio em sociedade e para o mercado de trabalho. O objetivo principal do presente trabalho é explorar em que medida a intencionalidade da legislação está sendo realizada no país, e no caso específico do município de Itabirito. Outro objetivo do estudo é propor a integração social no processo de redução da evasão. Para tanto, foi realizada discussão a partir da revisão de literatura acerca da dinâmica. da evasão escolar. Como resultado, identificamos que a aplicação legal ainda está longe do esperado, em desacordo com os objetivos do ensino médio, previstos nas legislações que compõem a estratégia educacional do Brasil.
Deteksi Kebocoran Pipa Air Menggunakan Machine Learning dengan Jaringan Nirkabel IEEE 802.15.4
Authors: Saputra Kurniawan , Al Rasyid M. Udin Harun , Hadi Muh. Zen Samsono 
Published: January 2023

Pipa adalah cara paling ekonomis dan paling aman dalam mendistribusikan hasil produk seperti air, petrokimia, gas, dan cairan lainnya. Terlepas dari manfaat tersebut, ternyata pipa memiliki ancaman yaitu potensi kebocoran. Artikel ini membahas pendeteksian kebocoran pipa air menggunakan parameter debit aliran. Pengujian dilakukan pada dua format dataset, menggunakan raw dataset dan process dataset menggunakan metode volume balance. Pada proses pembelajaran ada beberapa hal yang perlu disoroti seperti pemilihan tipe dataset, pre-processing dengan menormalisasi dataset, dan menerapkan metode fungsi kernel untuk meningkatkan kinerja akurasi prediksi ukuran dan lokasi kebocoran pipa. Dataset dilatih menggunakan algortima SVM untuk mengklasifikasikan ukuran dan lokasi kebocoran pipa. Hasil klasfikasi ukuran kebocoran dengan fungsi kernel polynomial pada raw dataset mencapai akurasi sebesar 98,25%, recall 99,1%, presisi 99,8%, dan F-measure 99,5%. Sedangkan fungsi kernel Radial Basis Function pada process dataset mencapai akurasi tertinggi sebesar 89,7%, recall 94,4%, presisi 95,4%, dan F-measure 94,6%. Dalam hal mengidentifkasikan lokasi kebocoran, fungsi kernel polynomial pada raw dataset meningkatkan akurasi sebesar 88,96%, recall 94,7%, presisi 91,5%, dan F-measure 92,8%. Sedangkan fungsi kernel polynomial pada process dataset mencapai akurasi sebesar 74,42%, recall 74,1%, presisi 72,8%, dan F-measure 71,3%.
Basic perception and propagation characteristics of bone-conducted sounds presented to facial parts
Authors: Uemura Ko , Otsuka Sho , Nakagawa Seiji 
Published: January 2023

Abstract
In conventional bone conduction (BC) devices, a vibrator is typically applied to the mastoid or condyle processes. Recently, however, BC-sound presentations to facial parts such as the nose have also been investigated. As the face is among the most complex structures in the human body, BC sounds presented to facial parts are likely to show different perception and propagation characteristics from those presented to conventional parts. We measured hearing thresholds, ear canal sound pressures in both ears, and head vibrations at both mastoid processes when BC sounds were presented to the facial (nasal, infraorbital region, zygomatic, jaw angle, and chin) and conventional (mastoid and condyle processes and forehead) parts of normal-hearing subjects. The results indicated that the facial parts and mastoid process had similar threshold characteristics. By changing the stimulus parts on the face, the hearing thresholds did not change, whereas the amplitudes of each propagation component changed significantly.
Mass spectroscopic measurement of time-varying ion composition in a pulse-modulated Ar/C4F8/O2 dual-frequency capacitively coupled plasma
Authors: Kuboi Shuichi , Kato Haruhito , Seki Yuto , Suzuki Haruka , Toyoda Hirotaka 
Published: January 2023

Abstract
The time dependence of the ion composition in pulse-modulated dual-frequency capacitively coupled plasma with Ar/C4F8/O2 was measured using a quadrupole mass spectrometer with an electrostatic energy analyzer. After turning on the pulse, Ar+ ions were preferentially generated, and then, the composition of C
x
F
y

+ ions, such as C2F4
+ and C3F5
+ ions, increased. This phenomenon was discussed on the basis of the time variation of electron temperature and the resultant change in the ratio of the C4F8 ionization rate to that of Ar atoms.
PENGARUH PEMBELAJARAN DARING MELALUI GOOGLE CLASSROOM UNTUK MENINGKATKAN PRESTASI BELAJAR BAHASA INDONESIA DI KELAS X IPS SMA NEGERI 2 KOTA PEMATANGSIANTAR TA 2021/2022
Authors: Anggiani Irna Dwi , Tansliova Lili 
Published: January 2023

Penelitian ini bertujuan untuk mengetahui berapa besar pengaruh pembelajaran daring melalui google classroom terhadap prestasi belajar bahasa Indonesia. Penelitian ini merupakan penelitian kuantitatif deskriftif. Penelitian ini dilakukan selama bulan Maret- Mei 2022 di SMA Negeri 2 Kota Pematansiantar. Populasi dalam penelitian ini berjumlah 309 siswa kelas X SMA Negeri 2 Kota Pematangsiantar, sampel dalam penelitian ini sebanyk 72 siswa kelas X IPS SMA Negeri 2. Teknik penelitian yang digunakan dalam penelitian ini yaitu dengan memeberikan angket pernyataan dan uji tes kepada 72 siswa. Hasil dari penelitian ini Nilai koefesien regresi google classroom (X) adalah 0,640 menyatakan bahwa setiap penambahan 1% dari google clasroom maka nilai prestasi belajar bahasa Indonesia di kelas X SMA Negeri 2 Kota Pematangsiantar bertambah sebesar 0,640 Koefesien nilai regresi tersebut bernilai positif, sehingga dapat dikatakan bahwa arah pengaruh variabel terhadap variabel Y adalah Positif.
BIAS KEWENANGAN FIKTIF POSITIF PENGADILAN TATA USAHA NEGARA DALAM RANAH PERIZINAN PASCA TERBITNYA UNDANG UNDANG CIPTA KERJA
Authors: Andi Andi 
Published: January 2023

Salah satu ketentuan mengenai perizinan yang diubah dalam Undang-Undang Nomor 11 Tahun 2020 tentang Cipta Kerja, yakni ketentuan Pasal 53 Undang-Undang Nomor 30 Tahun 2014 tentang Administrasi Pemerintahan, yakni mengenai kewenangan fiktif positif oleh pengadilan (dalam hal ini pengadilan tata usaha negara), yang sebelumnya dinormakan secara tegas dalam ketentuan Pasal 53 ayat (4), ayat (5), dan ayat (6) Undang-Undang Nomor 30 Tahun 2014, yang kemudian norma tersebut diubah, dengan diawali oleh ketentuan Pasal 174 Undang-Undang Nomor 11 Tahun 2020 tentang Cipta Kerja, dengan narasi frasa ”Dengan berlakunya Undang-Undang ini, kewenangan menteri, kepala lembaga, atau Pemerintah Daerah yang telah ditetapkan dalam undang-undang untuk menjalankan atau membentuk peraturan perundang-undangan harus dimaknai sebagai pelaksanaan kewenangan Presiden”, Kemudian diubah pula dalam ketentuan Pasal 175 Undang-Undang a quo. Metode penelitian yang digunakan adalah yuridis normatif, hasil penelitian diketahui bahwa pengadilan tata usaha negara memiliki kewenangan baik dalam ranah kompetensi absolut, maupun kompetensi relatif dalam perkara fiktif positif pada ranah perizinan pasca terbitnya Undang-Undang Cipta Kerja, dan kekuatan hukum putusan pengadilan tata usaha negara dalam ranah perizinan (perkara fiktif positif) pasca terbitnya Undang-Undang Cipta Kerja adalah sah dan mengikat secara hukum, sebab memenuhi unsur legalitas berdasarkan ketentuan peraturan perundang-undangan.
MENGAPA KORUPSI SULIT DIBERANTAS
Authors: Ervanda Rifqi Priambodo  , Miftahul Falah  , Yoga Pratama Silaban  
Published: January 2023

Artikel ini membahas tentang MENGAPA KORUPSI SULIT DIBERANTAS karena korupsi telah mendarah daging di setiap instansi pemerintahan maupun swasta di negeri ini. Korupsi dikategorikan sebagai extra ordinary crime dengan berbagai dimensinya, seperti economic crime, organized crime, white collar crime dan political crime. Dengan bentuknya yang extra ordinary crime, maka upaya pencegahan dan pemberantasan korupsi harus ditempuh dengan cara-cara yang luar biasa pula. Metode yang digunakan dalam penulisan artikel ini adalah dengan menggunakan deskriptif kualitatif dan Library Research. Tujuan dari penelitian ini adalah untuk mengungkapkan kejadian atau fakta, keadaan, yang terjadi secara langsung dengan menyuguhkan apa yang sedang terjadi secara apa adanya. Tujuan dari penelitian deskriptif kualitatif searah dengan rumusan masalah serta pertanyaan penelitian / identifikasi masalah penelitian. Hal ini disebabkan tujuan dari penelitian ini akan menjawab pertanyaan yang sebelumnya dikemukakan oleh rumusan masalah serta pertanyaan penelitian/ identifikasi masalah. Sumber data yang kami gunakan yaitu library research adalah data-data yang diperoleh dari buku, jurnal, internet, dan referensi lainnya yang sesuai dengan penelitian.
PERKEMBANGAN HUKUM LINGKUNGAN DI INDONESIA (Suatu Kajian Studi Literatur Hukum Lingkungan Hidup)
Authors: Widianti Putri Trias 
Published: January 2023

Riset terdahulu atau riset yang relevan sangat penting dalam suatu riset atau artikel ilmiah. Riset terdahulu atau riset yang relevan berfungsi untuk memperkuat teori dan penomena hubungan atau pengaruh antar variable. Artikel ini mereview Faktor-faktor yang membahas tentang hukum lingkungan hidup, pengawasan pembangunan, dan pengelolaan sumber daya alam suatu studi literatur. Hasil artikel literature review ini adalah: 1)Penegakan hukum terhadap perusakan lingkungan; 2) Peranan masyarakat dalam pengelolaan Sumber Daya Alam; dan 3) Upaya perlindungan Lingkungan Hidup.
FAKTOR-FAKTOR YANG MEMPENGARUHI DEMOGRAFI: FERTILITAS, MORTALITAS DAN MIGRASI (LITERATURE REVIEW PERILAKU KONSUMEN)
Authors: Sapto Bagaskoro Dwi , Aditya Alamsyah Fiqih , Ramadhan Surya 
Published: January 2023

Riset terdahulu atau riset yang relevan sangat penting dalam suatu riset atau artikel ilmiah. Riset terdahulu atau riset yang relevan berfungsi untuk memperkuat teori dan fenomena hubungan atau pengaruh antar variabel. Artikel ini mereview Faktor-faktor yang mempengaruhi Demografi, yaitu: Fertilitas, Mortalitas dan Migrasi, suatu studi literatur Perilaku Konsumen. Tujuan penulisan artikel ini guna membangun hipotesis pengaruh antar variabel untuk digunakan pada riset selanjutnya. Hasil artikel literature review ini adalah: 1) Fertilitas berpengaruh terhadap Demografi; 2) Mortalitas berpengaruh terhadap Demografi; dan 3) Migrasi berpengaruh terhadap Demografi.
The McDonald Accelerating Stars Survey: Architecture of the Ancient Five-planet Host System Kepler-444
Authors: Zhang 张周健 Zhoujian , Bowler Brendan P. , Dupuy Trent J. , Brandt Timothy D. , Brandt G. Mirek , Cochran William D. , Endl Michael , MacQueen Phillip J. , Kratter Kaitlin M. , Isaacson Howard T. , Franson Kyle , Kraus Adam L. , Morley Caroline V. , Zhou Yifan 
Published: January 2023

Abstract
We present the latest and most precise characterization of the architecture for the ancient (≈11 Gyr) Kepler-444 system, which is composed of a K0 primary star (Kepler-444 A) hosting five transiting planets and a tight M-type spectroscopic binary (Kepler-444 BC) with an A–BC projected separation of 66 au. We have measured the system’s relative astrometry using the adaptive optics imaging from Keck/NIRC2 and Kepler-444 A’s radial velocities from the Hobby-Eberly Telescope and reanalyzed relative radial velocities between BC and A from Keck/HIRES. We also include the Hipparcos-Gaia astrometric acceleration and all published astrometry and radial velocities in an updated orbit analysis of BC’s barycenter. These data greatly extend the time baseline of the monitoring and lead to significant updates to BC’s barycentric orbit compared to previous work, including a larger semimajor axis (

a
=

52.2

−
2.7

+
3.3

au), a smaller eccentricity (e = 0.55 ± 0.05), and a more precise inclination (

i
=
85

.°

4

−
0

.°

4

+
0

.°

3

). We have also derived the first dynamical masses of B and C components. Our results suggest that Kepler-444 A’s protoplanetary disk was likely truncated by BC to a radius of ≈8 au, which resolves the previously noticed tension between Kepler-444 A’s disk mass and planet masses. Kepler-444 BC’s barycentric orbit is likely aligned with those of A’s five planets, which might be primordial or a consequence of dynamical evolution. The Kepler-444 system demonstrates that compact multiplanet systems residing in hierarchical stellar triples can form at early epochs of the universe and survive their secular evolution throughout cosmic time.
Evolution of the Angular Momentum of Molecular Cloud Cores Formed from Filament Fragmentation
Authors: Misugi Yoshiaki , Inutsuka Shu-ichiro , Arzoumanian Doris 
Published: January 2023

Abstract
The angular momentum of molecular cloud cores plays an important role in the process of star formation. However, the time evolution of the angular momentum of molecular cloud cores is still unclear. In this paper, we perform three-dimensional simulations to investigate the time evolution of the angular momentum of molecular cloud cores formed through filament fragmentation. As a result, we find that most of the cores rotate perpendicular to the filament axis. The mean angular momentum of the cores changes by only around 30% during the initial stage of their formation process and then remains almost constant. In addition, we analyze the internal angular momentum structure of the cores. Although the cores gain angular momentum with various directions from the initial turbulent velocity fluctuations of their parent filaments, the angular momentum profile in each core converges to the self-similar solution. We also show that the degree of complexity of the angular momentum structure in a core decreases slightly with time. Moreover, we perform synthetic observations and show that the angular momentum profile measured from the synthetic mean velocity map is compatible with the observations when the filament inclination is taken into account. The present study suggests a theory of core formation from filament fragmentation where the angular momentum structures of the cores are determined by the velocity fluctuation along the filaments and both are compatible with the observations. This theory also provides new insights into the core properties that could be tested observationally.
Energy Conversion during Asymmetric Magnetic Reconnection
Authors: Chang Cong , Huang Kai , Lu San , Wang Rongsheng , Lu Quanming 
Published: January 2023

Abstract
Asymmetric magnetic reconnection usually occurs at the Earth’s magnetopause, where the magnetic field strength and plasma density are different between the magnetosheath and magnetosphere. In this paper, a two-dimensional particle-in-cell simulation model is used to study the energy conversion during asymmetric magnetic reconnection. Energy conversion can occur in the vicinity of the X-line, magnetosphere separatrix region, and reconnection fronts. In the vicinity of the X-line and magnetosphere separatrix region, the electromagnetic field energy is mainly transferred to electrons, while at the reconnection fronts, the electromagnetic field energy is mainly transferred to ions. For the case with weak magnetic field asymmetry, the reconnection fronts dominate the energy conversion, which is related to the inflowing Poynting flux S

z
at the fronts. For the case with strong magnetic field asymmetry, the energy conversion occurs around the X-line and magnetosphere separatrix region, but no longer at the reconnection fronts. This is because the inflowing Poynting flux S

x
near the magnetosphere separatrices provides electromagnetic energy for energy conversion. The density asymmetry has no significant effect on the spatial distribution of the energy conversion.
Searching for Anisotropic Stochastic Gravitational-wave Backgrounds with Constellations of Space-based Interferometers
Authors: Capurri Giulia , Lapi Andrea , Boco Lumen , Baccigalupi Carlo 
Published: January 2023

Abstract
Many recent works have shown that the angular resolution of ground-based detectors is too poor to characterize the anisotropies of the stochastic gravitational-wave background (SGWB). For this reason, we asked ourselves if a constellation of space-based instruments could be more suitable. We consider the Laser Interferometer Space Antenna (LISA), a constellation of multiple LISA-like clusters, and the Deci-hertz Interferometer Gravitational-wave Observatory (DECIGO). Specifically, we test whether these detector constellations can probe the anisotropies of the SGWB. For this scope, we considered the SGWB produced by two astrophysical sources: merging compact binaries, and a recently proposed scenario for massive black hole seed formation through multiple mergers of stellar remnants. We find that measuring the angular power spectrum of the SGWB anisotropies is almost unattainable. However, it turns out that it could be possible to probe the SGWB anisotropies through cross-correlation with the cosmic microwave background (CMB) fluctuations. In particular, we find that a constellation of two LISA-like detectors and CMB-S4 can marginally constrain the cross-correlation between the CMB lensing convergence and the SGWB produced by the black hole seed formation process. Moreover, we find that DECIGO can probe the cross-correlation between the CMB lensing and the SGWB from merging compact binaries.
Parker Solar Probe Encounters the Leg of a Coronal Mass Ejection at 14 Solar Radii
Authors: McComas D. J. , Sharma T. , Christian E. R. , Cohen C. M. S. , Desai M. I. , Hill M. E. , Khoo L. Y. , Matthaeus W. H. , Mitchell D. G. , Pecora F. , Rankin J. S. , Schwadron N. A. , Szalay J. R. , Shen M. M. , Braga C. R. , Mostafavi P. S. , Bale S. D. 
Published: January 2023

Abstract
We use Parker Solar Probe (PSP) observations to report the first direct measurements of the particle and field environments while crossing the leg of a coronal mass ejection (CME) very close to the Sun (∼14 Rs). An analysis that combines imaging from 1 au and PSP with a CME model, predicts an encounter time and duration that correspond to an unusual, complete dropout in low-energy solar energetic ions from H–Fe, observed by the Integrated Science Investigation of the Sun (IS⊙IS). The surrounding regions are populated with low-intensity protons and heavy ions from 10s to 100 keV, typical of some quiet times close in to the Sun. In contrast, the magnetic field and solar wind plasma show no similarly abrupt changes at the boundaries of the dropout. Together, the IS⊙IS energetic particle observations, combined with remote sensing of the CME and a dearth of other “typical” CME signatures, indicate that this CME leg is significantly different from the magnetic and plasma structure normally assumed for CMEs near the Sun and observed in interplanetary CMEs farther out in the solar wind. The dropout in low-energy energetic ions may be due to the cooling of suprathermal ions at the base of the CME leg flux tube, owing to the rapid outward expansion during the release of the CME.