bluuebunny/crossref_metadata_2025_split huggingface dataset:
PROPOSTA DE SEQUÊNCIA DIDÁTICA PARA A DISCUSSÃO DO TEMA HOMOFOBIA NO ENSINO DE CIÊNCIAS
Authors: Cunha Daniel Barcelos da , Costa Hawbertt Rocha , Sá-Silva Jackson Ronie 
Published: March 2021

O modelo hegemônico heteronormativo reproduz a heterossexualidade como fruto do determinismo biológico no qual o sexo determina um gênero e uma sexualidade específica cuja atração se dá para com o sexo oposto, ou seja, uma ideia de heterossexualidade compulsória. Na escola tal modelo é reforçado, não se discute a diferença e não se dá atenção a ela, o que leva ao estranhamento e à uma visão de anormalidade, situação que se estende para a sociedade e contribui para a manifestação de preconceitos como a homofobia. Neste estudo teórico qualitativo, foi elaborada uma proposta de Sequência Didática, com o objetivo de problematizar e desconstruir a visão negativa dada à homossexualidade e de desnaturalizar estereótipos. São propostas estratégias que evidenciem o papel da Ciência na produção do entendimento atual sobre a homossexualidade como uma variante da sexualidade humana e que merece ser valorizada, respeitada e legitimada. A utilização de uma Sequência Didática com estratégias discursivas e dialógicas, pode contribuir para a reelaboração e produção de novos significados, e consequentemente, para o combate e prevenção da homofobia.
Multi-pulse modulation method in photothermal atomic force microscopy for variable frequency modulation of incident light
Authors: Yamada Ayaka , Takahashi Takuji 
Published: March 2021

Abstract
Photothermal atomic force microscopy (PT-AFM) enables us to examine non-radiative recombination property with high spatial resolution. In order to realize variable frequency modulation of incident light in PT-AFM, we have proposed a multi-pulse modulation method, where the duration for light illumination is divided into multiple light pulses and their period is varied. We have assessed the validity of the proposed method through acquisition of photothermal signal images on microcrystalline materials under various modulation frequencies.
Fatty liver evaluation with double-Nakagami model under low-resolution conditions
Authors: Sato Yusuke , Tamura Kazuki , Mori Shohei , Tai Dar-In , Tsui Po-Hsiang , Yoshida Kenji , Hirata Shinnosuke , Maruyama Hitoshi , Yamaguchi Tadashi 
Published: March 2021

Abstract
In previous studies, the double-Nakagami (DN) model has been proposed for fatty liver assessment and applied to in vivo rat livers and clinical data sets. The healthy liver structure filter (HLSF) method, which extracts non-healthy areas using two DN parameters, has also been proposed. In this paper, we first verify the accuracy of the DN model and the HLSF method for acoustic fields at 15 and 5 MHz, which were reproduced using numerical simulation. We then apply the method to clinical data sets of livers observed using a frequency of 3 MHz and investigate the method’s clinical usefulness. A positive correlation (

r
=
0.28

) was found between the ratio of the non-healthy area and fat mass. Although the results were inferior to the results produced using 15 MHz ultrasound (

r
=
0.96

), we found that it was possible to detect the difference between a normal liver and a fatty liver even at a lower frequency.
أثر استراتيجية (خذ واحدة واعط واحدة) في تحصيل طلبة الاقسام غير الاختصاص في كليات التربية الأساسية في مادة العربية العامة
Authors: محمد المدرس صفا سالم 
Published: March 2021

هدف البحث الحالي التعرف على فاعلية استراتيجية خذ واحدة واعط واحدة في تحصيل طلبة الاقسام غير الاختصاص في كلية التربية الأساسية في مادة العربية العامة ، تكونت عينة البحث من (72) طالب وطالبة من المجتمع الأصلي موزعين على شعبتين لتمثل شعبة (أ) المجموعة التجريبية وشعبة (ب) المجموعة الضابطة بواقع (36) طالب وطالبة في المجموعة التجريبية التي درست مادة النحو بطريقة خذ واحدة واعط واحدة و(36) طالب وطالبة في المجموعة الضابطة التي درست بالطريقة الاعتيادية .
وكافأة الباحثة بين طلبة المجموعتين في متغيرات المعلومات السابقة والعمر الزمني محسوبا بالأشهر واختبار الذكاء،وصاغت الباحثة الاهداف السلوكية وأعدت الخطط التدريسية الإنموذجية للمجموعتين واعدت اختباراً تحصيلياً مكون من(20) من نوع الاختيار من متعدد ، وبعد اجراءات ايجاد معامل الصعوبة و الصدق والثبات للاختبار اصبح الاختبار جاهز للتطبيق ،واستمرت التجربة (8) اسابيع درست خلالها الباحثة طلبة المجموعتين (التجريبية والضابطة)، وبعد تطبيق التجربة استعملت الباحثة اختبار(t-Test) احدى الوسائل الإحصائية وبعد تحليل نتائج البحث التي اشارة الى وجود فرق ذو دلالة إحصائية ولصالح المجموعة التجريبية التي درست طلبتها وفق استراتيجية (خذ واحدة واعط واحدة).
الموقف الصحفي العراقي من الاحداث السياسية في العراق (1931 - 1968)
Authors: عبدالرزاق الاستاذ المساعد شاهين سهام , جاسم المدرس عثمان سعدون 
Published: March 2021

"تؤدي الصحافة دوراً مهماً سواء كان سياسياً او اجتماعياً او اقتصادياً في حياتنا اليومية وبكل مجالاتها من خبر وتحقيق وصور كاريكاتورية وتعليق وحوار ويجب ان يكون للصحافة يقظة واهتماما بصدد اهتمامها بالنضال من اجل نظام أعلامي جديد". "ومنذ تأسيس الدولة العراقية (المملكة وبعد ذلك الجمهورية) انقسمت الصحف بين صحف رسمية مثل (والوقائع العراقية والزوراء) ...الخ مؤيدة للمملكة وتوجهاتها وصحف معارضة مثل (الثبات والسياسة والاستقلال والعالم العربي) التي مثلت صوت الشعب وحركات التحرر، كما مثلت الصحافة خلال المدة التي نحن بصدد الحديث عنها فكر الأحزاب التي أصدرتها، وان كثير من الأحزاب كانت تعارض الحكومة وكانت صحافتها دائماً ما تشن هجماتها على الحكومات المتعاقبة ومنذ تأسيس الدولة العراقية حتى وفاة الملك فيصل الأول وكذلك منذ تأسيس الجمهورية بعد ثورة (1958م) تعرضت جميع الحكومات للنقد والتجريح من قبل صحافة الأحزاب حتى الوزارة التي ألغت قانون المطبوعات وأطلقت خمساً وعشرين صحيفة بين عقالها لم يسلم من النقد والتجريح مما يعطي انطباعاً ان تلك الصحف كانت تدافع عن أحزابها وليس عن مصلحة الشعب الأصلية.
ANALISIS FAKTOR-FAKTOR YANG BERHUBUNGAN DENGAN TINGKAT DEPRESI PASIEN PASCA STROKE
Authors: Efendi Reni , Suryani  , Sasmita Heppi 
Published: March 2021

ANALISA FAKTOR FAKTOR YANG BERHUBUNGAN DENGAN TINGKAT DEPRESI PASCA STROKE DI RUMAH SAKIT STROKE NASIONAL
(RSSN) BUKITTINGGI

Reni1, Suryani2, Heppi Sasmita3

Mahasiswa Program Studi Magister Keperawatan Universitas Andalas Padang
Guru Besar Ilmu Keperawatan Universitas Padjajaran
Dosen Program Studi Magister Keperawatan Universitas Andalas Padang

ABSTRAK

Stroke menyebabkan berbagai defisit neurologik, tanda dan gejala stroke berupa gangguan motorik, gangguan fungsi kognitif dan efek psikologis. Kondisi ini dapat mengakibatkan depresi pada pasien pasca stroke. Penelitian ini bertujuan mengetahui faktor-faktor yang berhubungan dengan tingkat depresi pasca stroke. Desain penelitian deskriptif analitik, pendekatan Cross Sectional, sampel 80 orang dengan total sampling. Hasil penelitian adalah gangguan motorik berat sebesar 93,8%, gangguan fungsi kognitif sebesar 31,2 %, dukungan keluarga yang suportif sebesar 95%, tingkat depresi berat sebesar 50%. Tidak ada hubungan yang bermakna antara umur, jenis kelamin, fungsi kognitif dan dukungan keluarga terhadap tingkat depresi pasca stroke. Namun secara rinci terdapat hubungan yang bermakna antara tingkat pendidikan, penyakit penyerta, lama menderita strok dan gangguan motorik dengan tingkat depresi pasca stroke. Saran untuk institusi pelayanan kesehatan untuk dapat memperhatikan faktor-faktor penyebab terjadinya depresi pasca stroke dalam melakukan pengakajian keperawatan khususnya pengkajian psikososial dalam keperawatan jiwa.

Kata kunci : faktor-faktor penyebab depresi, stroke
Korkeakouluopiskelijoiden koetut oppimisvaikeudet ja niiden yhteys elämän eri osa-alueisiin
Authors: Rinne Hanna , Korkeamäki Johanna , Villa Tiia 
Published: March 2021

Korkeakouluopiskelijoiden oppimisvaikeuksia ja koettuja oppimisen ongelmia ei ole Suomessa juuri tutkittu. Tässä tutkimuksessa tavoitteena oli tarkastella korkeakouluopiskelijoiden todettujen ja koettujen oppimisvaikeuksien yleisyyttä sekä oppimisvaikeuksien yhteyttä elämän eri osa-alueisiin.
Aineistona tutkimuksessa oli kaksi korkeakouluopiskelijoille suunnattua kyselyaineistoa: Opiskelijabarometri 2012 (N = 1649) sekä Korkeakouluopiskelijoiden terveystutkimus 2012 (N = 3 790). Tutkimusväestönä oli 20–29-vuotiaat korkeakouluopiskelijat. Menetelminä käytettiin ristiintaulukointia. Osuuksille laskettiin 95 prosentin luottamusvälit.
Koettuja oppimisvaikeuksia oli Korkeakouluopiskelijoiden terveystutkimuksessa 6–8 prosentilla ja Opiskelijabarometrissa 9–11 prosentilla, todettuja puolestaan 2–4 prosentilla. Naiset raportoivat oppimisvaikeuksia miehiä useammin. Oppimisvaikeuksia kokeneilla naisista viidesosalla ja miehistä kymmenesosalla oli todettu oppimisvaikeus. Oppimisvaikeuksia kokeneilla oli muita yleisemmin todettuja ja koettuja mielenterveyden ongelmia sekä heikompi koettu terveys. Lisäksi heillä oli ongelmia sosiaalisessa kanssakäymisessä muita yleisemmin. Oppimisvaikeuksia kokevat tarvitsivat enemmän tukea opiskeluun kuin muut. He myös käyttivät muita yleisemmin terveyspalveluita ja olivat niihin muita tyytymättömämpiä. Lisäksi heillä oli muita opiskelijoita yleisemmin taloudellisia ongelmia.
Eye-tracking glasses in face-to-face interactions: Manual versus automated assessment of areas-of-interest
Authors: Jongerius Chiara , Callemein T. , Goedemé T. , Van Beeck K. , Romijn J. A. , Smets E. M. A. , Hillen M. A. 
Published: March 2021

AbstractThe assessment of gaze behaviour is essential for understanding the psychology of communication. Mobile eye-tracking glasses are useful to measure gaze behaviour during dynamic interactions. Eye-tracking data can be analysed by using manually annotated areas-of-interest. Computer vision algorithms may alternatively be used to reduce the amount of manual effort, but also the subjectivity and complexity of these analyses. Using additional re-identification (Re-ID) algorithms, different participants in the interaction can be distinguished. The aim of this study was to compare the results of manual annotation of mobile eye-tracking data with the results of a computer vision algorithm. We selected the first minute of seven randomly selected eye-tracking videos of consultations between physicians and patients in a Dutch Internal Medicine out-patient clinic. Three human annotators and a computer vision algorithm annotated mobile eye-tracking data, after which interrater reliability was assessed between the areas-of-interest annotated by the annotators and the computer vision algorithm. Additionally, we explored interrater reliability when using lengthy videos and different area-of-interest shapes. In total, we analysed more than 65 min of eye-tracking videos manually and with the algorithm. Overall, the absolute normalized difference between the manual and the algorithm annotations of face-gaze was less than 2%. Our results show high interrater agreements between human annotators and the algorithm with Cohen’s kappa ranging from 0.85 to 0.98. We conclude that computer vision algorithms produce comparable results to those of human annotators. Analyses by the algorithm are not subject to annotator fatigue or subjectivity and can therefore advance eye-tracking analyses.
Impacts of Educational Intervention on Cervical Cancer Knowledge Among Health Care Students in a Tertiary Institution
Authors: Ojieabu Winifred , Ojieabu Christabel , Bello Shakirat , Oseji Frederick , Saka Ajibola 
Published: March 2021

Background: Cervical cancer (CC) is the commonest female cancer in the developing nations. The virus behind CC is Human papillomavirus (HPV). In sub-Saharan Africa, high mortality arises from low public awareness and knowledge about the disease.
Objective: This study assessed the effectiveness of educational intervention as a means to improve cervical cancer knowledge among health care students.
Methodology: Year 4-5 medical and pharmacy students of Olabisi Onabanjo University (OOU) took part in a quasi-experimental study. An anonymous pretested self-administered questionnaire was used to collect data at pre-and post-intervention sessions for comparison after one and half hours of educational intervention lecture. Data were analyzed with SPSS version 16. P ≤ 0.05 was considered significant.
Results: Age range 21-26 years was 85.0%, male to female: 1.1:1.2. Majority (63.1%) had heard of CC prior to the intervention, gender it affects (50.6%), stages of cervical cancer (26.3%). Infection with HPV (14.4%), genetics (61.9%), having many children (15.0%). Pap test is to detect early signs of CC (41.3%), pap test not needed after HPV vaccine (20.0%), healthy adult women have pap test every three years (21.3%), All the scores significantly increased after post-intervention.
Conclusion: Educational intervention was successful in improving CC knowledge among participants.
Two-point Statistics without Bins: A Continuous-function Generalization of the Correlation Function Estimator for Large-scale Structure
Authors: Storey-Fisher Kate , Hogg David W. 
Published: March 2021

Abstract
The two-point correlation function (2pcf) is the key statistic in structure formation; it measures the clustering of galaxies or other density field tracers. Estimators of the 2pcf, including the standard Landy–Szalay (LS) estimator, evaluate the 2pcf in hard-edged separation bins, which is scientifically inappropriate and results in a poor trade-off between bias and variance. We present a new 2pcf estimator, the Continuous-Function Estimator, which generalizes LS to a continuous representation and obviates binning in separation or any other pair property. Our estimator, inspired by the mathematics of least-squares fitting, replaces binned pair counts with projections onto basis functions; it outputs the best linear combination of basis functions to describe the 2pcf. The choice of basis can take into account the expected form of the 2pcf, as well as its dependence on pair properties other than separation. We show that the Continuous-Function Estimator with a cubic-spline basis better represents the shape of the 2pcf compared to LS. We also estimate directly the baryon acoustic scale, using a small number of physically motivated basis functions. Critically, this leads to a reduction in the number of mock catalogs required for covariance estimation, which is currently the limiting step in many 2pcf analyses. We discuss further applications of the Continuous-Function Estimator, including determination of the dependence of clustering on galaxy properties and searches for potential inhomogeneities or anisotropies in large-scale structure.
A Study in Frequency-dependent Effects on Precision Pulsar Timing Parameters with the Pulsar Signal Simulator
Authors: Shapiro-Albert B. J. , Hazboun J. S. , McLaughlin M. A. , Lam M. T. 
Published: March 2021

Abstract
In this paper we introduce a new python package, the Pulsar Signal Simulator, or psrsigsim, which is designed to simulate a pulsar signal from emission at the pulsar, through the interstellar medium, to observation by a radio telescope, and digitization in a standard data format. We use psrsigsim to simulate observations of three millisecond pulsars, PSRs J1744–1134, B1855+09, and B1953+29, to explore the covariances between frequency-dependent parameters, such as variations in the dispersion measure (DM), pulse profile evolution with frequency, and pulse scatter broadening. We show that psrsigsim can produce realistic simulated data and can accurately recover the parameters injected into the data. We also find that while there are covariances when fitting DM variations and frequency-dependent parameters, they have little effect on timing precision. Our simulations also show that time-variable scattering delays decrease the accuracy and increase the variability of the recovered DM and frequency-dependent parameters. Despite this, our simulations also show that the time-variable scattering delays have little impact on the rms of the timing residuals. This suggests that the variability seen in recovered DMs, when time-variable scattering delays are present, is due to a covariance between the two parameters, with the DM modeling out the additional scattering delays.
Black Hole Glimmer Signatures of Mass, Spin, and Inclination
Authors: Wong George N. 
Published: March 2021

Abstract
Gravitational lensing near a black hole is strong enough that light rays can circle the event horizon multiple times. Photons emitted in multiple directions at a single event, perhaps because of localized, impulsive heating of accreting plasma, take multiple paths to a distant observer. In the Kerr geometry, each path is associated with a distinct light travel time and a distinct arrival location in the image plane, producing black hole glimmer. This sequence of arrival times and locations uniquely encodes the mass and spin of the black hole and can be understood in terms of properties of bound photon orbits. We provide a geometrically motivated treatment of Kerr glimmer and evaluate it numerically for simple hot-spot models to show that glimmer can be measured in a finite-resolution observation. We discuss potential measurement methods and implications for tests of the Kerr hypothesis.
Time and Charge-sign Dependence of the Heliospheric Modulation of Cosmic Rays
Authors: Aslam O. P. M. , Bisschoff D. , Ngobeni M. D. , Potgieter M. S. , Munini R. , Boezio M. , Mikhailov V. V. 
Published: March 2021

Abstract
Simultaneous and continuous observations of galactic cosmic-ray electrons (e
−) and positrons (e
+) from the PAMELA and AMS02 space experiments are most suitable for numerical modeling studies of the heliospheric modulation of these particles below 50 GeV. A well-established comprehensive three-dimensional modulation model is applied to compute full spectra for e
− and e
+ with the purpose of reproducing the observed ratio e
+/e
− for a period that covers the previous long and unusual deep solar minimum activity and the recent maximum activity phase, including the polarity reversal of the solar magnetic field. For this purpose, the very local interstellar spectra for these particles were established first. Our study is focused on how the main modulation processes, including particle drifts, and other parameters, such as the three major diffusion coefficients, evolved and how the corresponding charge-sign dependent modulation subsequently occurred. The end result of our effort is the detailed reproduction of e
+/e
− from 2006 to 2015, displaying both qualitative and quantitative agreement with the main observed features. Particularly, we determine how much particle drift is needed to explain the time dependence exhibited by the observed e
+/e
− during each solar activity phase, especially during the polarity reversal phase, when no well-defined magnetic polarity was found.
Hubble Space Telescope Observations of Two Faint Dwarf Satellites of Nearby LMC Analogs from MADCASH*
Authors: Carlin Jeffrey L. , Mutlu-Pakdil Burçin , Crnojević Denija , Garling Christopher T. , Karunakaran Ananthan , Peter Annika H. G. , Tollerud Erik , Forbes Duncan A. , Hargis Jonathan R. , Lim Sungsoon , Romanowsky Aaron J. , Sand David J. , Spekkens Kristine , Strader Jay 
Published: March 2021

Abstract
We present a deep Hubble Space Telescope (HST) imaging study of two dwarf galaxies in the halos of Local Volume Large Magellanic Cloud (LMC) analogs. These dwarfs were discovered as part of our Subaru+Hyper Suprime-Cam MADCASH survey: MADCASH-1 is a satellite of NGC 2403 (D ∼ 3.2 Mpc), and MADCASH-2 is a previously unknown dwarf galaxy near NGC 4214 (D ∼ 3 Mpc). Our HST data reach >3.5 mag below the tip of the red giant branch (TRGB) of each dwarf, allowing us to derive their structural parameters and assess their stellar populations. We measure TRGB distances (

D

MADCASH
−
1

=

3.41

−
0.23

+
0.24

Mpc,

D

MADCASH
−
2

=

3.00

−
0.15

+
0.13

Mpc), and confirm the dwarfs’ associations with their host galaxies. MADCASH-1 is a predominantly old, metal-poor stellar system (age ∼13.5 Gyr, [M/H] ∼ −2.0), similar to many Local Group dwarfs. Modelling of MADCASH-2's color–magnitude diagram suggests that it contains mostly ancient, metal-poor stars (age ∼13.5 Gyr, [M/H] ∼ −2.0), but that ∼10% of its stellar mass was formed 1.1–1.5 Gyr ago and ∼1% was formed 400–500 Myr ago. Given its recent star formation, we search MADCASH-2 for neutral hydrogen using the Green Bank Telescope, but find no emission and estimate an upper limit on the H i mass of <4.8 × 104
M
⊙. These are the faintest dwarf satellites known around host galaxies of LMC mass outside the Local Group (M

V,MADCASH−1 = −7.81 ± 0.18, M

V,MADCASH−2 = −9.15 ± 0.12), and one of them shows signs of recent environmental quenching by its host. Once the MADCASH survey for faint dwarf satellites is complete, our census will enable us to test predictions from cold dark matter models for hierarchical structure formation and discover the physical mechanisms by which low-mass hosts influence the evolution of their satellites.
Shock Cooling Emission from Extended Material Revisited
Authors: Piro Anthony L. , Haynie Annastasia , Yao Yuhan 
Published: March 2021

Abstract
Following shock breakout, the emission from an astrophysical explosion is dominated by the radiation of shock-heated material as it expands and cools, known as shock cooling emission (SCE). The luminosity of SCE is proportional to the initial radius of the emitting material, which makes its measurement useful for investigating the progenitors of these explosions. Recent observations have shown some transient events have especially prominent SCE, indicating a large radius that is potentially due to low-mass extended material. Motivated by this, we present an updated analytic model for SCE that can be utilized to fit these observations and learn more about the origin of these events. This model is compared with numerical simulations to assess its validity and limitations. We also discuss SN 2016gkg and SN 2019dge, two transients with large early luminosity peaks that have previously been attributed to SCE of extended material. We show that their early power-law evolution and photometry are well matched by our model, strengthening support for this interpretation.
Search for the Stochastic Gravitational-wave Background Induced by Primordial Curvature Perturbations in LIGO’s Second Observing Run
Authors: Kapadia Shasvath J. , Lal Pandey Kanhaiya , Suyama Teruaki , Kandhasamy Shivaraj , Ajith Parameswaran 
Published: March 2021

Abstract
Primordial density perturbations in the radiation-dominated era of the early universe are expected to generate stochastic gravitational waves (GWs) due to nonlinear mode coupling. In this Letter, we report on a search for such a stochastic GW background in the data of the two LIGO detectors during their second observing run (O2). We focus on the primordial perturbations in the range of comoving wavenumbers 1016–1018 Mpc−1 for which the stochastic background falls within the detectors’ sensitivity band. We do not find any conclusive evidence of this stochastic signal in the data, and thus place the very first GW-based constraints on the amplitude of the power spectrum at these scales. We assume a log-normal shape for the power spectrum and Gaussian statistics for the primordial perturbations, and vary the width of the power spectrum to cover both narrow and broad spectra. Derived upper limits (95%) on the amplitude of the power spectrum are 0.01–0.1. As a byproduct, we are able to infer upper limits on the fraction of the universe’s mass in ultralight primordial black holes (M
PBH ≃ 10−20–10−19
M
⊙) at their formation time to be ≲10−25.
Quelles sont les raisons profondes qui empêchent le praticien d’écrire sur sa pratique ?
Authors: Perret Valérie 
Published: March 2021

Écrire ? Exister ? Et si la difficulté d’écrire sa pratique était liée à la difficulté de se sentir pleinement vivant ? Dans cet article Valérie Perret explore d’abord les raisons qui se nichent plus ou moins profondément dans le scénario de vie et qui peuvent avoir freiné la libre expression. Puis à travers des exemples de sa pratique, elle expose comment elle s’implique de tout son être pour accompagner les personnes à écrire quand c’est nécessaire. F.V.