bluuebunny/crossref_metadata_2025_split huggingface dataset:
Keterkaitan Literasi Dengan Adaptasi Mahasiswa Di Masa Pandemik
Authors: Ayu Imelda Ratih 
Published: March 2022

Adaptasi merupakan kemampuan yang sangat penting dimiliki oleh mahasiswa agar dapat menjalani perubahan sistem belajar di masa pandemik dengan baik. Ketika mahasiswa tidak mampu beradaptasi dengan perubahan akan berdampak pada tidak teraturnya kegiatan belajar, cemas , dan stress akademik. Literasi diperkirakan akan berkaitan dengan mampu tidaknya mahasiswa beradaptasi. Penelitian bertujuan untuk membuktikan menggambarkan adanya keterkaitan antar dua variabel tersebut. Metode penelitian korelasional digunakan dalam penelitian ini, dengan membagikan angket kepada 30 orang sampel, teknik pengumpulan data menggunakan penyebaran angket. Instrumen penelitian menggunakan skala likert mengenai proses adaptasi yang dilakukan responden, dan kegiatan literasi yang dilakukan responden, kemudian dianalisis dengan menggunakan analisis korelasional product moment. Hasil penelitian menunjukkan kemampuan adaptasi mahasiswa berkaitan erat dengan aktivitas literasi yang dilakukan mahasiswa, terbukti dengan rxy = 0.489 > rtabel = 0.463 pada taraf nyata 1%. Penelitian merekomendasikan untuk literasi lebih digalakan pada mahasiswa, terutama literasi digital. Peneliti selanjutnya dapat mengembangkan dan mengujicobakan model literasi digital berdasarkan konsep Bawden.
Meningkatkan Kemampuan Kerjasama Melalui Permainan Tradisional Gobak Sodor
Authors: Idhayani Nurul , Kurniawati Dwi 
Published: March 2022

Tujuan dalam penelitian ini adalah untuk mengetahui peningkatan kemampuan kerjasama anak melalui permainan tradisional gobak sodor pada anak Kelompok B di TK Mekar Sari Kecamatan Amonggedo Kabupaten Konawe. Penelitian ini merupakan jenis Penelitian Tindakan Kelas (PTK) yang dilaksanakan dalam 2 (dua) siklus pembelajaran yang masing-masing siklus terdiri 2 kali pertemuan dengan tahapan: perencanaan, pelaksanaan, observasi, evaluasi dan refleksi. Subjek penelitian ini adalah anak didik kelompok B di TK Mekar Sari Kecamatan Amonggedo Kabupaten Konawe yang berjumlah 20 anak didik yang terdiri dari 10 anak laki-laki dan 10 anak perempuan. Hasil penelitian pada observasi awal memiliki ketuntasan klasikal sebesar 40% yaitu hanya 8 anak didik. pada siklus I menjadi 13 anak didik (65%), selanjutnya pada siklus II meningkat menjadi 18 anak didik (90%) dan telah melampaui standar indikator keberhasilan yang telah ditentukan yaitu 75%. Hasil ini menunjukkan kemampuan kerjasama pada anak kelompok B di TK Mekar Sari Kecamatan Amonggedo Kabupaten Konawe dapat ditingkatkan melalui permainan tradisional gobak sodor.
Penerapan Model Pembelajaran Berbasis Masalah Untuk Meningkatkan Hasil Belajar Kimia Siswa SMA
Authors: Rosmawati Rosmawati 
Published: March 2022

Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa pada materi struktur atom di kelas X SMAN 02 Bombana melalui penerapan model pembelajaran berbasis masalah. Penelitian ini dilaksanakan pada semester ganjil tahun ajaran 2018/2019, di SMAN 02 Bombana pada siswa Kelas X, berjumlah 32 siswa yang terdiri atas 20 siswa laki-laki dan 12 siswa perempuan. Faktor yang diamati dalam penelitian ini adalah faktor siswa dan faktor guru. Penelitian ini dilaksanakan dalam 2 (dua) siklus, meliputi : (a) perencanaan; (b) pelaksanaan tindakan; (c) observasi dan evaluasi, (d) refleksi. Penelitian ini merupakan penelitian tindakan kelas. Hasil penelitian menunjukkan bahwa melalui penerapan model pembelajaran berbasis masalah dapat meningkatkan aktivitas siswa dan guru, serta hasil belajar siswa. Aktivitas belajar siswa pada siklus I mencapai 71,58%, meningkat pada siklus II menjadi 81,25%. Aktivitas guru pada siklus I mencapai 83,25%, meningkat pada siklus II menjadi 91,50%. Hasil belajar siswa pada siklus I diperoleh rata-rata nilai sebesar 68,12 meningkat menjadi 72,50 pada siklus II. Rerata ketuntasan hasil belajar siswa yaitu pada siklus I diperoleh nilai sebesar 68,75%, meningkat pada siklus II menjadi 81,25% siswa telah mencapai nilai ≥70. Kriteria Ketuntasan Minimal sekolah yaitu 70% siswa memperoleh nilai ≥70 dapat dicapai.
Penerapan Metode Demonstrasi Untuk Meningkatkan Hasil Belajar Matematika Siswa
Authors: Rahmawati Rahmawati 
Published: March 2022

Tujuan penelitian ini adalah meningkatkan hasil belajar matematika siswa kelas XII IPA3 SMA Negeri 03 Bombana dengan menggunakan metode demonstrasi. Penelitian ini merupakan penelitian tindakan kelas. Penelitian ini dilaksanakan di kelas XII-IPA3 SMA Negeri 03 Bombana mulai tanggal 3 Juli 2018 sampai dengan 15 September 2018 dengan jumlah 34 siswa. Penelitian ini menggunakan 2 siklus yang masing-masing siklus dilaksanakan dalam 4 tahapan, yaitu perencanaan, pelaksanaan tindakan, observasi dan evaluasi serta refleksi. Pengumpulan data dilakukan dengan menggunakan lembar observasi dan tes hasil belajar. Indikator keberhasilan dalam penelitian ini ditetapkan jika minimal 75% siswa telah tuntas secara individu. Berdasarkan hasil penelitian dan pembahasan dapat disimpulkan bahwa proses pembelajaran matematika siswa kelas XII IPA3 di SMA Negeri 03 Bombana pada materi pokok peluang dengan menggunakan metode demonstrasi dapat meningkatkan hasil belajar siswa. Hal itu tergambar dari meningkatnya jumlah siswa yang mencapai ketuntasan individu, yakni pada siklus I hanya terdapat 3 orang (8,82%) meningkat menjadi 34 orang (100%).
Pengaruh Metode Problem Based Learning Dalam Meningkatkan Hasil Belajar Siswa Sekolah Dasar
Authors: Sihartin Sihartin 
Published: March 2022

Tujuan penelitian ini adalah meningkatkan kemampuan siswa kelas V SD Negeri 2 Kendari dalam dalam menentukan sisi miring segitiga siku-siku dengan menggunakan metode problem based learning. Jenis penelitian ini adalah penelitian tindakan kelas. Pelaksanaan penelitian tindakan kelas ini terdiri dari 2 siklus dengan tahapan perencanaan, pelaksanaan tindakan, observasi & evaluasi, dan refleksi. Subjek penelitian ini adalah siswa kelas V SD Negeri 2 Kendari dengan jumlah 35 siswa. Pengumpulan data dilakukan dengan menggunakan lembar observasi dan tes hasil belajar. Indikator kinerja yang berkaitan dengan peningkatan prestasi belajar matematika siswa yaitu minimal 75% siswa telah memperoleh nilai 6,5. Berdasarkan hasil evaluasi pada setiap tindakan dalam penelitian ini, diperoleh persentase kemampuan siswa dalam kemampuan dan keterampilan cara menentukan sisi miring segitiga siku-siku pada siklus I sebesar 57,14%, dan tindakan siklus II sebesar 90,66%. Hasil ini menunjukkan bahwa kemampuan siswa kelas V SD Negeri 2 Kendari dalam kemampuan dan keterampilan cara menentukan sisi miring segitiga siku-siku dapat ditingkatkan melalui metode problem based learning.
STUDI KASUS PEMBELAJARAN LUAR JARINGAN PESERTA DIDIK KELAS VII SMPK CHRISTO REGI ENDE
Authors: Penu Maria Elsensi , Nasar Adrianus , Kaleka Melkyanus Bili Umbu 
Published: March 2022

Penelitian ini bertujuan untuk mengetahui keefektifan pembelajaran dari rumah secara luar jaringan pada mata pelajaran Ilmu Pengetahuan Alam peserta didik kelas VII Sekolah Menengah Pertama Katolik Christo Regi. Pendekatan yang digunakan dalam penelitian adalah pendekatan deskriptif dengan jenis penelitian kualitatif fenomenologi. Ciri penelitian kualitatif adalah bersifat deskriptif dimana data yang dikumpulkan berupa kata-kata dan juga gambar. Subyek dari penelitian ini adalah satu orang guru dan 25 orang peserta didik kelas VII. Teknik pengumpulan data menggunakan teknik wawancara, observasi, kuesioner dan dokumentasi. Data-data yang sudah terkumpul, kemudian dianalisis secara deskriptif dengan tahapan meliputi penjaringan data, klasifikasi, verifikasi dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa pelaksanaan proses pembelajaran luar jaringan yang terjadi adalah; 1) perencaan pembelaajran berjalan cukup efektif; 2) pelaksanaan pembelajaran berjalan cukup efektif; 3) pelaksanaan evaluasi berjalan efektif. dan 4) Hasil belajar siswa cukup baik
Konsumsi Berita Insidental di Media Sosial pada Generasi Dewasa
Authors: Realita Era , Setiadi Usman 
Published: March 2022

Berita insidental merupakan hasil olah sistem algoritma yang diterapkan oleh perusahaan media. Penelitian ini menunjukkan bagaimana latar belakang pengguna media sosial mempengaruhi konsumsi berita insidental. Metode yang digunakan adalah kajian pustaka dan wawancara singkat pada 20 orang dewasa yang bekerja di berbagai sektor dengan rentang usia 23-25 tahun. Hasil menunjukkan bahwa pekerjaan dan usia mempengaruhi pemilihan konten informasi. Konten-konten tersebut dipilih untuk menunjang kebutuhan informasi mereka. Menanggapi munculnya berita insidental, beberapa narasumber mengaku tidak peduli pada asal-usul berita tersebut. Selama konten yang dimuat menarik minat mereka, tidak ada yang perlu dipertanyakan. mereka juga beranggapan bahwa berita insidental dapat menjadi jalan pintas yang efektif untuk mencapai sumber asli berita. Walaupun demikian, dalam mengkonsumsi berita insidental sebaiknya kita tetap waspada dan berhati-hati, karena tidak semua sumber berita itu akurat dan dari teori kemunculan berita insidental yang memanfaatkan rekam jejak digital, dapat mengacam data pribadi kita.
A Spatially Dependent Correction of Gaia EDR3 Parallax Zero-point Offset based on 0.3 million LAMOST DR8 Giant Stars
Authors: Wang Chun , Yuan Haibo , Huang Yang 
Published: March 2022

Abstract
We have studied the zero-point offset of Gaia Early Data Release 3 (EDR3) parallaxes based on a sample of 0.3 million giant stars built from the LAMOST data with distance accuracy better than 8.5%. The official parallax zero-point corrections largely reduce the global offset in the Gaia EDR3 parallaxes: the global parallax offsets are −27.9 μas and −26.5 μas (before correction) and +2.6 μas and +2.9 μas (after correction) for the five- and six-parameter solutions, respectively. The bias of the raw parallax measurements is significantly dependent on the G magnitudes, spectral colors, and positions of stars. The official parallax zero-point corrections could reduce parallax bias patterns with G magnitudes, while could not fully account the patterns in the spaces of the spectral colors and positions. In the current paper, a spatially dependent parallax zero-point correction model for Gaia EDR3 five-parameter solution in the LAMOST footprint is first provided with the advantage of huge number of stars in our sample.
Star–Galaxy Image Separation with Computationally Efficient Gaussian Process Classification
Authors: Muyskens Amanda L. , Goumiri Imène R. , Priest Benjamin W. , Schneider Michael D. , Armstrong Robert E. , Bernstein Jason , Dana Ryan 
Published: March 2022

Abstract
We introduce a novel method for discerning optical telescope images of stars from those of galaxies using Gaussian processes (GPs). Although applications of GPs often struggle in high-dimensional data modalities such as optical image classification, we show that a low-dimensional embedding of images into a metric space defined by the principal components of the data suffices to produce high-quality predictions from real large-scale survey data. We develop a novel method of GP classification hyperparameter training that scales approximately linearly in the number of image observations, which allows for application of GP models to large-size Hyper Suprime-Cam Subaru Strategic Program data. In our experiments, we evaluate the performance of a principal component analysis embedded GP predictive model against other machine-learning algorithms, including a convolutional neural network and an image photometric morphology discriminator. Our analysis shows that our methods compare favorably with current methods in optical image classification while producing posterior distributions from the GP regression that can be used to quantify object classification uncertainty. We further describe how classification uncertainty can be used to efficiently parse large-scale survey imaging data to produce high-confidence object catalogs.
Investigating the Cross Sections of Coronal Mass Ejections through the Study of Nonradial Flows with STEREO/PLASTIC
Authors: Al-Haddad Nada , Galvin Antoinette B. , Lugaz Noé , Farrugia Charles J. , Yu Wenyuan 
Published: March 2022

Abstract
The solar wind, when measured close to 1 au, is found to flow mostly radially outward. There are, however, periods when the flow makes angles up to 15° away from the radial direction, both in the east–west and north–south directions. Stream interaction regions (SIRs) are a common cause of east–west flow deflections. Coronal mass ejections (CMEs) may be associated with nonradial flows in at least two different ways: (1) the deflection of the solar wind in the sheath region, especially close to the magnetic ejecta front boundary, may result in large nonradial flows; and (2) the expansion of the magnetic ejecta may include a nonradial component, which should be easily measured when the ejecta is crossed away from its central axis. In this work, we first present general statistics of nonradial solar wind flows as measured by STEREO/PLASTIC throughout the first 13 yr of the mission, focusing on solar cycle variation. We then focus on the larger deflection flow angles and determine that most of these are associated with SIRs near solar minimum and with CMEs near solar maximum. However, we find no clear evidence of strongly deflected flows, as would be expected if large deflections around the magnetic ejecta or ejecta with elliptical cross sections with large eccentricities were common. We use these results to develop a better understanding of CME expansion and the nature of magnetic ejecta, and point to shortcomings in our understanding of CMEs.
WALLABY Pre-pilot Survey: The Effects of Tidal Interaction on Radial Distribution of Color in Galaxies of the Eridanus Supergroup
Authors: Wang Shun , Wang Jing , For Bi-Qing , Lee Bumhyun , Reynolds T. N. , Lin Xuchen , Staveley-Smith L. , Shao Li , Wong O. I. , Catinella B. , Serra P. , Verdes-Montenegro L. , Westmeier T. , Lee-Waddell K. , Koribalski B. S. , Murugeshan C. , Elagali A. , Kleiner D. , Rhee J. , Bigiel F. , Bosma A. , Holwerda B. W. , Oh S.-H. , Spekkens K. 
Published: March 2022

Abstract
We study the tidal interaction of galaxies in the Eridanus supergroup, using H i data from the pre-pilot survey of the Widefield ASKAP L-band Legacy All-sky Blind surveY. We obtain optical photometric measurements and quantify the strength of tidal perturbation using a tidal parameter S
sum. For low-mass galaxies of M
* ≲ 109
M
⊙, we find a dependence of decreasing H i to optical disk size ratio with increasing S
sum, but no dependence of H i spectral line asymmetry with S
sum. This is consistent with the behavior expected under tidal stripping. We confirm that the color profile shape and color gradient depend on the stellar mass, but there is an additional correlation of low-mass galaxies having their color gradients within 2R
50 increasing with higher S
sum. For these low-mass galaxies, the dependence of color gradients on S
sum is driven by the color becoming progressively redder in the inner disk when tidal perturbations are stronger. For high-mass galaxies, there is no dependence of color gradients on S
sum, and we find a marginal reddening throughout the disks with increasing S
sum. Our result highlights tidal interaction as an important environmental effect in producing the faint end of the star formation suppressed sequence in galaxy groups.
A Multiparameter Degeneracy in Microlensing Events with Extreme Finite Source Effects
Authors: Johnson Samson A. , Penny Matthew T. , Gaudi B. Scott 
Published: March 2022

Abstract
For microlenses with sufficiently low mass, the angular radius of the source star can be much larger than the angular Einstein ring radius of the lens. For such extreme finite source effect (EFSE) events, finite source effects dominate throughout the duration of the event. Here, we demonstrate and explore a continuous degeneracy between multiple parameters of such EFSE events. The first component in the degeneracy arises from the fact that the directly observable peak change of the flux depends on both the ratio of the angular source radius to the angular Einstein ring radius and the fraction of the baseline flux that is attributable to the lensed source star. The second component arises because the directly observable duration of the event depends on both the impact parameter of the event and the relative lens-source proper motion. These two pairwise degeneracies become coupled when the detailed morphology of the light curve is considered, especially when including a limb-darkening profile of the source star. We derive these degeneracies mathematically through analytic approximations and investigate them further numerically with no approximations. We explore the likely physical situations in which these mathematical degeneracies may be realized and potentially broken. As more and more low-mass lensing events (with ever decreasing Einstein ring radii) are detected with improving precision and increasing cadence from microlensing surveys, one can expect that more of these EFSE events will be discovered. In particular, the detection of EFSE microlensing events could increase dramatically with the Roman Space Telescope Galactic Bulge Time Domain Survey.
Multimessenger Constraints on Magnetic Fields in Merging Black Hole–Neutron Star Binaries
Authors: D’Orazio Daniel J. , Haiman Zoltán , Levin Janna , Samsing Johan , Vigna-Gómez Alejandro 
Published: March 2022

Abstract
The LIGO–Virgo–KAGRA Collaboration recently detected gravitational waves (GWs) from the merger of black hole–neutron star (BHNS) binary systems GW200105 and GW200115. No coincident electromagnetic (EM) counterparts were detected. While the mass ratio and BH spin in both systems were not sufficient to tidally disrupt the NS outside the BH event horizon, other, magnetospheric mechanisms for EM emission exist in this regime and depend sensitively on the NS magnetic field strength. Combining GW measurements with EM flux upper limits, we place upper limits on the NS surface magnetic field strength above which magnetospheric emission models would have generated an observable EM counterpart. We consider fireball models powered by the black hole battery mechanism, where energy is output in gamma rays over ≲1 s. Consistency with no detection by Fermi-GBM or INTEGRAL SPI-ACS constrains the NS surface magnetic field to ≲1015 G. Hence, joint GW detection and EM upper limits rule out the theoretical possibility that the NSs in GW200105 and GW200115, and the putative NS in GW190814, retain dipolar magnetic fields ≳1015 G until merger. They also rule out formation scenarios where strongly magnetized magnetars quickly merge with BHs. We alternatively rule out operation of the BH-battery-powered fireball mechanism in these systems. This is the first multimessenger constraint on NS magnetic fields in BHNS systems and a novel approach to probe fields at this point in NS evolution. This demonstrates the constraining power that multimessenger analyses of BHNS mergers have on BHNS formation scenarios, NS magnetic field evolution, and the physics of BHNS magnetospheric interactions.
On the Fast Radio Burst and Persistent Radio Source Populations
Authors: Law Casey J. , Connor Liam , Aggarwal Kshitij 
Published: March 2022

Abstract
The first fast radio burst (FRB) to be precisely localized was associated with a luminous persistent radio source (PRS). Recently, a second FRB/PRS association was discovered for another repeating source of FRBs. However, it is not clear what makes FRBs or PRS or how they are related. We compile FRB and PRS properties to consider the population of FRB/PRS sources. We suggest a practical definition for PRS as FRB associations with luminosity greater than 1029 erg s−1 Hz−1 that are not attributed to star formation activity in the host galaxy. We model the probability distribution of the fraction of FRBs with PRS for repeaters and nonrepeaters, showing there is not yet evidence for repeaters to be preferentially associated with PRS. We discuss how FRB/PRS sources may be distinguished by the combination of active repetition and an excess dispersion measure local to the FRB environment. We use CHIME/FRB event statistics to bound the mean per-source repetition rate of FRBs to be between 25 and 440 yr−1. We use this to provide a bound on the density of FRB-emitting sources in the local universe of between 2.2 × 102 and 5.2 × 104 Gpc−3 assuming a pulsar-like beamwidth for FRB emission. This density implies that PRS may comprise as much as 1% of compact, luminous radio sources detected in the local universe. The cosmic density and phenomenology of PRS are similar to that of the newly discovered, off-nuclear “wandering” active galactic nuclei (AGN). We argue that it is likely that some PRS have already been detected and misidentified as AGN.
Detecting Preheating in Protoclusters with Lyα Forest Tomography
Authors: Kooistra Robin , Inoue Shigeki , Lee Khee-Gan , Cen Renyue , Yoshida Naoki 
Published: March 2022

Abstract
Studies of low-redshift galaxy clusters suggest the intracluster medium (ICM) has experienced nongravitational heating during the formation phase of the clusters. Using simple phenomenological heating prescriptions, we simulate the effect of this preheating of the nascent ICM in galaxy protoclusters and examine its effect on Lyα forest tomographic maps. We analyze a series of cosmological zoom-in simulations of protoclusters within the framework of the Lyα transmission−dark matter (DM) density distribution. We find that the more energy is injected into the proto-ICM at z = 3, the more the distribution at high DM density tilts toward higher Lyα transmission. This effect has been confirmed in both low-resolution simulations adopting a preheating scheme based on entropy floors, as well as in higher-resolution simulations with another scheme based on energy floors. The evolution of the slope of this distribution is shown to vary with redshift. The methodology developed here can be applied to current and upcoming Lyα forest tomographic survey data to help constrain feedback models in galaxy protoclusters.
Polarization of Rotationally Oblate Self-luminous Exoplanets with Anisotropic Atmospheres
Authors: Chakrabarty Aritra , Sengupta Sujan , Marley Mark S. 
Published: March 2022

Abstract
The young self-luminous giant exoplanets are expected to be oblate in shape, owing to the high rotational speeds observed for some objects. Similar to the case of brown dwarfs, the thermal emission from these planets should be polarized by scatterings of molecules and condensate cloud particles, and the rotation-induced asymmetry of the planet’s disk would yield to net nonzero detectable polarization. Considering an anisotropic atmosphere, we present here a three-dimensional approach to estimating the disk-averaged polarization that arises due to the oblateness of the planets. We solve the multiple-scattering vector radiative transfer equations at each location on the planet’s disk and calculate the local Stokes vectors, and then calculate the disk-integrated flux and linear polarization. For a cloud-free atmosphere, the polarization signal is observable only in the visible wavelength region. However, the presence of clouds in the planetary atmospheres leads to a detectable amount of polarization in the infrared wavelength region where the planetary thermal emission peaks. Considering the different broadband filters of the SPHERE-IRDIS instrument of the Very Large Telescope, we present generic models for the polarization at different wavelength bands as a function of their rotation period. We also present polarization models for the exoplanets β Pic b and ROXs 42B b, as two representative cases that can guide future observations. Our insights into the polarization of young giant planets presented here would be useful for the upcoming polarimetric observations of the directly imaged planets.