bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Kesulitan yang Dihadapi Guru pada Pembelajaran Matematika Materi Pengurangan Bilangan Cacah
Authors: Natashya Novianti Delvy , Feny Satul Fitriyah  , Richa Okta Barera  
Published: March 2023

Siswa berkesulitan belajar matematika sering melakukan kekeliruan dalam belajar berhitung dan kekeliruan dalam menyelesaikan soal yang berkaitan dengan bilangan cacah terutama pada operasi pengurangan. Tujuan dari penelitian ini adalah untuk mengetahui jenis kesalahan yang dilakukan oleh guru dalam menjelaskan materi matematika dalam bentuk pengurangan bilangan cacah dan upaya apa yang akan dilakukan oleh guru dalam mengatasinya. Metode yang digunakan dalam penelitian ini adalah deskriptif kualitatif. Subyek penelitian yaitu guru kelas 3 Sekolah Dasar Negeri Puncu 1. Hasil wawancara yang dilakukan, guru menyatakan bahwa sudah menggunakan berbagai perangkat pembelajaran seperti kartu bergambar dan berbagai video pembelajaran dan powerpoint interaktif, namun masih banyak kendala yang dihadapi saat memasuki materi operasi pengurangan bilangan cacah, yakni siswa belum memahami cara menentukan hasil pengurangan satuan dengan satuan, puluhan dengan puluhan, ratusan dengan ratusan,siswa saat mengerjakan teknik meminjam langsung mengurangi bilangan besar dan kecil karena mereka belum memahami unsur-unsur operasi pengurangan. Factor yang mempengaruhi kesalahan tersebut adalah adanya miskonsepsi yang tidak terkendali antara guru dan juga siswa.
Pengaruh Tingkat Pendidikan Orang Tua terhadap Kemandirian Mengerjakan Tugas Rumah Siswa Kelas IV SDN Wonosari
Authors: Widodo Aji , Yuwono Ahmad Agung 
Published: March 2023

This study aims to determine the influence parents' education level on independence in doing homework for fourth graders at the Wonosari State Elementary School Temanggung (SD N WONOSARI) in the 2021/2022 school year.
This quantitative research use data collection methods in the form of questionnaires and also several surveys of parents of fourth grade students of Wonosari State Elementary School. Questionnaires are used to find out how much independence students have in doing homework. Before being implemented, the instrument had passed the validity stage using the Pearson Product Moment and the reliability test using the Cronbach Alpha formula. while the survey was conducted to find out and also as a means of collecting data on the level of education of parents of students and the analysis in this study was using simple linear regression analysis and for data collection using population research.
The results of this study after going through the normality test, linearity test, heteroscedasticity test, hypothesis testing and also the regression coefficient test obtained a simple regression equation as follows: Y = 13,048 + 8,737. X which shows that if the education of parents increases by 1 point, the level of independence will increase by 8.737. There is an influence of the level of parental education on the independence of doing students' homework and the value of R Square = 0.880 results in the calculation reaching a level of 88% of the total number of fourth grade elementary school students. Wonosari country, thas can be proven that there is a significant influence on the level of parental education on the independence of doing homework for fourth graders at Wonosari Elemtary School
Validitas Bahan Ajar Berupa Handout Berbasis Santifik Pada Siswa KelasVII SMP Pertiwi 2 Padang
Authors: Suriani Teni , Saruruk Arcenius 
Published: March 2023

Abstrak. Penelitian ini bertujuan mengembangkan dan menghasilkan bahan ajar berupa Handout berbasis saintifik pada siswa kelas VII SMP Pertiwi 2 Padang yang valid. Handout tersebut sebagai pendukung kegiatan pembelajaran dengan scientific approach (5M) yaitu mengamati, menanya, mencoba, mengasosiasi dan mengkomunikasikan. Handout ini dapat membantu siswa dalam memahami materi aritmatika sosial dengan menerapkan 5M dalam pembelajaran. Kualitas produk berupa handout yang dikembangkan dilengkapi dengan kuis dan beberapa soal latihan. Handout ini dapat meningkatkan pemahaman belajar matematika siswa dan dirancang dengan menggunakan kurikulum 2013. Hasil penelitian diharapkan dapat memberikan manfaat bagi guru dan siswa sebagai bahan ajar alternatif dalam pembelajaran matematika. Metode penelitian ini merupakan penelitian pengembangan yang mengacu pada model pengembangan 4-D, yaitu tahap pendefinisian (define), perancangan (design), pengembangan (develop), dan penyebaran (disseminate). Tetapi karena keterbatasan peneliti, penelitian ini hanya dilakukan sampai tahap pengembangan (develop). Subjek penelitian ini siswa kelas VII SMP Pertiwi 2 Padang dengan jumlah siswa 18 orang. Instrument yang digunakan untuk mengukur kualitas bahan ajar yang dikembangkan adalah penilaian Handout untuk mengukur kevalidan. Validasi bahan ajar berupa Handout berbasis saintifik divalidasi oleh dua validator ahli dalam bidang pendidikan matematika dan satu validator ahli dalam bidang bahasa. Berdasarkan hasil validasi secara keseluruhan menunjukkan Handout berbasis saintifik sudah valid dengan pencapaian persentase 75%. Sehingga dapat disimpulkan bahan ajar berupa Handout berbasis saintifik pada materi Aritmatika Sosial sudah valid dan layak digunakan untuk tahap berikutnya.
Kata Kunci: Validitas; Handout berbasis Saintifik
La programación neurolingüística, una posible heramienta de abordaje en la gestión de conflictos para la supervisión de enfermería en la unidad de diálisis
Authors: Dapena Fabiola 
Published: March 2023

La enfermera que asume la responsabilidad de la supervisión de una unidad de diálisis debería saber, que se enfrentará a lo largo de su ejercicio profesional con múltiples conflictos, que podríamos incluso considerar arquetípicos. A la supervisión se le exige como requisitos de formación complementaria la gestión por procesos, liderazgo y desarrollo de personas y resolución de conflictos. En los conflictos considero que las características más importantes a destacar es que son inevitables, siempre gestionables e imprescindibles para crecer en un equipo. El rol principal de la supervisión de enfermería en la gestión de conflictos, es conseguir resolverlo de forma funcional, lo que significa, que la resolución ayuda a caminar hacia la maduración del equipo, a fomentar el análisis crítico y a promover el cambio y la creatividad. La supervisión es el agente activo en habilidades de gestión que deberá evitar una resolución disfuncional que mantiene la tensión, los comportamientos negativos, la posible distorsión de la realidad y la reducción de la colaboración. Convertirse en este agente activo implica realizar una formación proactiva, consciente y continua. Significa “me responsabilizo de atender mi desarrollo” y “me dedico respetuosamente a transformarme”. La programación neurolingüística aglutina estrategias para el desarrollo personal con un enfoque eminentemente práctico.
The Serpent-Fighting Imagery of Anatolia in the 2nd Millennium BC and Malatya Serpentine Monster in the Light of Newly Published Old Assyrian Seal Impression from Kültepe
Authors: Shelestin Vladimir , Nemirovsky Alexandre , Iasenovskaia Anastasia 
Published: March 2023

The present work deals with serpent-fighting motifs from Anatolia of the second millennium BC reconsidered in the light of recently discovered composition with a serpent-fighting scene on an Old Assyrian seal impression from Kültepe kept at the Pushkin State Museum of Fine Arts in Moscow (I 2 б 1591). Besides this sealing, the famous representation at the Malatya Relief H (the orthostat AMM 12250) and myths of Illuyanka and Hedammu are compared to each other according to various criteria of depicting the hero, the monster and the fighting scene itself. The scholars often regarded Malatya Relief H as representing the plot of Illuyanka myth, but the discovery of dragon-slaying scene on the Pushkin Museum’s sealing gives grounds for its re-analyzing. It is revealed that the pictorial monuments from Anatolia in contrast to the textual ones depict the hero acting alone; most of Anatolian dragons have front paws.
The ultimate fighting is shown in iconography as a close combat struggle while in the narratives the close combat seems to give more advantage to the serpent. The composition similarity of Malatya Relief and the Pushkin Museum’s sealing is demonstrated in general as well as in concrete details. This fact allows to trace the development of the Neo-Hittite dragon-slaying imagery and plots to pre-Hittite times (the dragon-slaying motif as depicted in the orthostat AMM 12250 roots back at least to the 18th century BC when similar features were reflected at the Old Assyrian sealing from the Pushkin Museum I 2 б 1591) and to solve some problems of interpretation for the Malatya Relief H (number of monster’s heads, identification of monster’s parts stretched up to the hero’s figure, possible role of the dagger, etc.).
Text and aspects of its consideration in the context of theory and practice of manager’s assistant’s activities
Authors: BORKO T.M. 
Published: March 2023

The article deals with the text and aspects of its consideration in the context of theory and practice of manager’s assistant’s activities. It is proved that developments of the manager’s assistant’s activities fundamentals are based on the essential knowledge about text and its theory. In the frameworks of the theory of editing the text is, mainly, considered as a principal object of editing analysis. Text as a principal object of editing is stated to be main training body when the certain part of the discipline “Theory and Practice of Manager’s Assistant’s Activities” is delivered for thestudents of the specialty ”Informational, Librarian and Archival Activities”. For the future specialists the mentioned-above is considered to be the very important aspect of their professional activities. At present the problems of text ethics are becoming more significant and urgent. Political texts, initially, are considered to be similar in some aspects to advertising ones but that fact has been recently recognized. Future professionals should take into account the notion of “precedent-related texts”.
L-dwarf Detection from SDSS Images using Improved Faster R-CNN
Authors: Cao Zhi , Yi Zhenping , Pan Jingchang , Su Hao , Bu Yude , Kong Xiao , Luo Ali 
Published: March 2023

Abstract
We present a data-driven approach to automatically detect L dwarfs from Sloan Digital Sky Survey (SDSS) images using an improved Faster R-CNN framework based on deep learning. The established L-dwarf automatic detection (LDAD) model distinguishes L dwarfs from other celestial objects and backgrounds in SDSS field images by learning the features of 387 SDSS images containing L dwarfs. Applying the LDAD model to the SDSS images containing 93 labeled L dwarfs in the test set, we successfully detected 83 known L dwarfs with a recall rate of 89.25% for known L dwarfs. Several techniques are implemented in the LDAD model to improve its detection performance for L dwarfs, including the deep residual network and the feature pyramid network. As a result, the LDAD model outperforms the model of the original Faster R-CNN, whose recall rate of known L dwarfs is 80.65% for the same test set. The LDAD model was applied to detect L dwarfs from a larger validation set including 843 labeled L dwarfs, resulting in a recall rate of 94.42% for known L dwarfs. The newly identified candidates include L dwarfs, late M and T dwarfs, which were estimated from color (i − z) and spectral type relation. The contamination rates for the test candidates and validation candidates are 8.60% and 9.27%, respectively. The detection results indicate that our model is effective to search for L dwarfs from astronomical images.
Single-band VLBI Absolute Astrometry
Authors: Petrov Leonid 
Published: March 2023

Abstract
The ionospheric path delay impacts single-band, very long baseline interferometry (VLBI) group delays, which limits their applicability for absolute astrometry. I consider two important cases: when observations are made simultaneously in two bands, but delays in only one band are available for a subset of observations; and when observations are made in one-band design. I developed optimal procedures of data analysis for both cases using Global Navigation Satellite System (GNSS) ionosphere maps, provided a stochastic model that describes ionospheric errors, and evaluated their impact on source position estimates. I demonstrate that the stochastic model is accurate at a level of 15%. I found that using GNSS ionospheric maps as is introduces serious biases in estimates of declination and I developed a procedure that almost eliminates them. I found serendipitously that GNSS ionospheric maps have multiplicative errors and have to be scaled by 0.85 in order to mitigate the declination bias. A similar scale factor was found in comparison of the vertical total electron content from satellite altimetry against GNSS ionospheric maps. I favor interpretation of this scaling factor as a manifestation of the inadequacy of the thin-shell model of the ionosphere. I showed that we are able to model the ionospheric path delay to the extent that no noticeable systematic errors emerge and we are able to assess adequately the contribution of the ionosphere-driven random errors on source positions. This makes single-band absolute astrometry a viable option that can be used for source position determination.
The Circular Velocity Curve of the Milky Way from 5–25 kpc Using Luminous Red Giant Branch Stars
Authors: Zhou Yuan , Li Xinyi , Huang Yang , Zhang Huawei 
Published: March 2023

Abstract
We present a sample of 254,882 luminous red giant branch (LRGB) stars selected from the APOGEE and LAMOST surveys. By combining photometric and astrometric information from the Two Micron All Sky Survey and Gaia survey, the precise distances of the sample stars are determined by a supervised machine-learning algorithm: the gradient-boosted decision trees. To test the accuracy of the derived distances, member stars of globular clusters (GCs) and open clusters are used. The tests by cluster member stars show a precision of about 10% with negligible zero-point offsets, for the derived distances of our sample stars. The final sample covers a large volume of the Galactic disk(s) and halo of 0 < R < 30 kpc and ∣Z∣ ≤ 15 kpc. The rotation curve (RC) of the Milky Way across the radius of 5 ≲ R ≲ 25 kpc has been accurately measured with ∼54,000 stars of the thin disk population selected from the LRGB sample. The derived RC shows a weak decline along R with a gradient of −1.83 ± 0.02 (stat.) ± 0.07 (sys.) km s−1 kpc−1, in excellent agreement with the results measured by previous studies. The circular velocity at the solar position, yielded by our RC is 234.04 ± 0.08 (stat.) ± 1.36 (sys.) km s−1, again in great consistency with other independent determinations. From the newly constructed RC, as well as constraints from other data, we have constructed a mass model for our Galaxy, yielding a mass of the dark matter halo of M
200 = (8.05 ± 1.15) × 1011
M
⊙ with a corresponding radius of R
200 = 192.37 ± 9.24 kpc and a local dark matter density of 0.39 ± 0.03 GeV cm−3.
Modest Dust Settling in the IRAS04302+2247 Class I Protoplanetary Disk
Authors: Villenave M. , Podio L. , Duchêne G. , Stapelfeldt K. R. , Melis C. , Carrasco-Gonzalez C. , Le Gouellec V. J. M. , Ménard F. , de Simone M. , Chandler C. , Garufi A. , Pinte C. , Bianchi E. , Codella C. 
Published: March 2023

Abstract
We present new Very Large Array observations, between 6.8 and 66 mm, of the edge-on Class I disk IRAS04302+2247. Observations at 6.8 mm and 9.2 mm lead to the detection of thermal emission from the disk, while shallow observations at the other wavelengths are used to correct for emission from other processes. The disk radial brightness profile transitions from broadly extended in previous Atacama Large Millimeter/submillimeter Array 0.9 mm and 2.1 mm observations to much more centrally brightened at 6.8 mm and 9.2 mm, which can be explained by optical depth effects. The radiative transfer modeling of the 0.9 mm, 2.1 mm, and 9.2 mm data suggests that the grains are smaller than 1 cm in the outer regions of the disk, allowing us to obtain the first lower limit for the scale height of grains emitting at millimeter wavelengths in a protoplanetary disk. We find that the millimeter dust scale height is between 1 au and 6 au at a radius 100 au from the central star, while the gas scale height is estimated to be about 7 au, indicating a modest level of settling. The estimated dust height is intermediate between less evolved Class 0 sources, which are found to be vertically thick, and more evolved Class II sources, which show a significant level of settling. This suggests that we are witnessing an intermediate stage of dust settling.
Acceleration of Relativistic Particles in Counterpropagating Circularly Polarized Alfvén Waves
Authors: Isayama S. , Takahashi K. , Matsukiyo S. , Sano T. 
Published: March 2023

Abstract
Counterpropagating Alfvén waves are ubiquitously observed in many astrophysical environments, such as a star surface and a planetary foreshock. We discuss an efficient particle acceleration mechanism in two counterpropagating circularly polarized Alfvén waves. Phase transitions of particle behavior occur when wave amplitudes exceed two critical values. Above the critical amplitudes, the numerical simulation shows that any particles irreversibly gain relativistic energy within a short time regardless of their initial position and energy once the coherent waveform is formed. The accelerated particles have spatial coherence. Higher wave phase velocity requires smaller critical amplitudes, while the maximum attainable energy increases as the wavenumber and the frequency decrease. The results may be applicable in some astrophysical phenomena, as well as a future laboratory experiment using high-power lasers.
Chapitre 5. L’innovation frugale au service de systèmes de santé durables
Authors: Ravez Laurent 
Published: March 2023

La bioéthique est parfois présentée comme une série de repères universels visant à réguler les pratiques de soin et les recherches sur l’être humain. Une telle présentation ne tient cependant pas la route face à l’histoire de la discipline. La bioéthique est née dans le contexte idéologique particulier qui régnait aux Etats-Unis dans les années 1960-1970. Doit-on alors abandonner tout espoir d’universalité pour des repères éthiques qui ont fait la preuve de leur utilité pour éclairer les pratiques de santé ? En distinguant soigneusement l’universel de l’uniforme, cette contribution montre, à partir des travaux de G. Tangwa, qu’il est possible de respecter les spécificités des cultures dans le monde, tout en gardant une visée universelle à la bioéthique.
Assessing the Impact of Persistent HIV Infection on Innate Lymphoid Cells Using In Vitro Models
Authors: Boulay Aude , Trabanelli Sara , Boireau Stéphanie , Boyer-Clavel Myriam , Nisole Sébastien , Romero Pedro , Jandus Camilla , Beignon Anne-Sophie , Arhel Nathalie J 
Published: March 2023

Abstract
Pathogens that persist in their host induce immune dysfunctions even in the absence of detectable replication. To better understand the phenotypic and functional changes that persistent infections induce in sentinel innate immune cells, we developed human PBMC-based HIV models of persistent infection. Autologous nonactivated PBMCs were cocultured with chronically infected, acutely infected, or uninfected cells and were then analyzed by unsupervised high-dimensional flow cytometry. Using this approach, we identified prevalent patterns of innate immune dysfunctions associated with persistent HIV infections that at least in part mirror immune dysfunctions observed in patients. In one or more models of chronic infection, bystander CD16+ NK cells expressing markers of activation, such as CD94, CD45RO, CD62L, CD69, CD25, and immune checkpoints PD1, Tim3, TIGIT, NKG2A and Lag3, were significantly reduced. Conversely, helper ILC subsets expressing PDL1/PDL2 were significantly enriched in chronic infection compared with either uninfected or acute infection, suggesting that chronic HIV-1 infection was associated with an inhibitory environment for bystander ILC and NK subsets. The cell-based models of persistent infection that we describe here provide versatile tools to explore the molecular mechanisms of these immune dysfunctions and unveil the contribution of innate immunity in sustaining pathogen persistence.
Cell Cycle–Mediated Regulation of Secondary Ig Diversification
Authors: Bello Amanda , Müller Antonia , Hirth Gianna , Giebeler Liane N , Böttcher Katrin , Voigt Stefanie , Jungnickel Berit 
Published: March 2023

Abstract
Secondary Ig diversification in B cells requires the deliberate introduction of DNA damage into the Ig genes by the enzyme activation-induced cytidine deaminase (AID) and the error-prone resolution of AID-induced lesions. These processes must be tightly regulated because they may lead to lymphomagenesis if they act on genes other than the Ig genes. Since B cells may limit secondary Ig diversification mechanisms during the cell cycle to minimize genomic instability, we restricted the activity of AID specifically to the G1 or S/G2 phase to investigate the cell cycle contribution to the regulation of somatic hypermutation, class switch recombination, and Ig gene conversion in human, murine, and avian B cells, respectively. The efficient induction of AID in different cell cycle phases allowed us for the first time, to our knowledge, to discriminate G1- from S/G2-specific events of regulation. We show that the processes of Ig gene conversion and C/G mutagenesis during somatic hypermutation can be achieved throughout the cell cycle, whereas A/T mutagenesis and class switch recombination require AID-mediated deamination in G1. Thus, AID activity in G1, but not in S/G2, leads to the efficient accomplishment of all mechanisms of secondary Ig diversification. Our findings refine the current state-of-the-art knowledge in the context of the regulation of secondary Ig diversification.
Preliminary Study of College Students’ Creative Thinking Skills on Electromagnetic Material
Authors: Marviyani Ericha Ayusepta , Sukarmin Sukarmin , Sanjaya I Gusti Made 
Published: March 2023

Objective: This study aims to analyze the initial ability of student's creative thinking skills on electromagnetic materials and find a solution method of learning model suitable to the students' conditions. Method: The design of this study was pre-experimental. The data collection technique used a test method using creative thinking skills test instrument. The test instruments used in this study were tested for validity and reliability before use. Results: The results of this study showed different results. The percentage of the fluency indicator is 96.71% in the very good category, the percentage of the flexibility indicator is 51.97% in the medium category, the percentage of the elaboration indicator is 36.18%, and the originality is 16.45% in the less category. The average of all indicators is 50.32%, with the medium category. Novelty: Students' creative thinking skills can be developed through various methods, including the PjBL model, the Inquiry Social Learning model, PBL combined with Flashcard media, and PjBL integrated with STEM-based e-learning. The implications of this study can be used as a reference and essential alternative for future researchers to design learning tools using specific learning methods/models to increase students' or college students' creative thinking skills.