bluuebunny/crossref_metadata_2025_split huggingface dataset:
MISKONSEPSI SISWA DALAM MENYEDERHANAKAN OPERASI PERKALIAN DAN PEMBAGIAN PADA BENTUK ALJABAR MENURUT TEORI BRUNER
Authors: Annisa Kurniawati  , Hanifah Nurus Sopiany  
Published: June 2022

This study aims to determine the types of student misconceptions in simplifying multiplications and division operations algebraic form. The research method used is a qualitative method with a descriptive approach, subject in this research were students VIIK at SMPN 1 west Karawang for the 2020/2021 academic year with a total of 20 students in early stages of data collection using test and non test instruments is questionnaires. Then the data are proceed to the second stages, that is taking 4 selected objects by purposive sampling where each objects represents highest,middle,lowest class categories based on test and non-tes result. 4 objects were taken to analyze related to the types of students misconceptions that arise in solving problems by referring to Bruner’s cognitive processes. The result of this study indicates types of misconceptions experienced by students due ti incompability with Bruner’s cognitive processes including; (a) misconceptions of notation due to an error in the transformation stage ; (b) generalization misconceptions due to errors in the information stage ; (c) misconceptions about the application of the rules due to an error in the information stage; (d) Misconceptions about the meaning of letters due to errors in the information stage.
RELIABILITY ASSESMENT SISTEM DISTRIBUSI 20 KV DI PT PLN (PERSERO) ULP MOJOAGUNG MENGGUNAKAN MARKOV MODEL
Authors: Enrico  , Puspita Sari Erine , Ridzki Imron , Mahda Habsari Kumala 
Published: June 2022

Analisis Markov Model merupakan suatu model probabilistik berbentuk khusus yang umumnya dinamakan Stochastic process atau proses perubahan probabilistik yang terjadi secara terus menerus. Metode tersebut digunakan untuk menganalisis kemungkinan terjadinya gangguan di tahun berikutnya (2021 dan 2022). Keandalan penyulang dinilai berdasarkan durasi dan frekuensi gangguan. Proses analisis mengacu pada data gangguan penyulang tahun 2018-2020 menggunakan Markov Model. Hasil analisis digunakan untuk menentukan upaya-upaya peningkatan keandalan penyulang. Pada tahun 2021 diperkirakan 70,59% Penyulang Mojolegi mengalami gangguan setiap bulannya dengan 29,41% gangguan level G. Sedangkan di tahun 2022 persentase gangguan naik 1,07% dari tahun sebelumnya dengan level gangguan G sebesar 28,63%. Hal tersebut menggambarkan Penyulang Mojolegi masih rawan terjadi gangguan dan mengalami kenaikan persentase gangguan disetiap tahunya. Pada tahun 2021 diperkirakan 11,43% Penyulang Gading mengalami gangguan setiap bulannya dengan 25,00% gangguan level G. Sedangkan persentase gangguan di tahun 2022 konsisten sebesar 11,43 dengan level gangguan G sebesar 25,00%. Hal tersebut menggambarkan Penyulang Gading masih dalam koridor aman dari gangguan dan mengalami bernilai konstan disetiap tahunnya. Dari hasil analisis didapatkan daerah rawan gangguan dengan penyebab gangguannya. Dalam menyikapi hal tersebut PT PLN (Persero) ULP Mojoagung dapat memfokuskan pemeliharaan jaringan distribusi pada daerah yang rawan gangguan. Upaya peningkatan keandalan untuk Penyulang Mojolegi dapat difokuskan pada section V. Upaya peningkatan keandalan untuk Penyulang Gading dapat difokuskan pada section II. Hal tersebut bertujuan untuk meningkatkan keandalan keandalan penyulang pada PT PLN (Persero) ULP Mojoagung.
RANCANG BANGUN MPPT (MAXIMUM POWER POINT TRACKER) SOLAR PV TIPE CONSTANT VOLTAGE (CV) DENGAN MENGGUNAKAN CUK CONVERTER
Authors: Heryanto Irwan , Dwi Pradita Rika , Izza Syarifatul 
Published: June 2022

Sistem Photovoltaic (PV) merupakan alat konversi energi dari cahaya matahari menjadi listrik yang memiliki potensi besar di Indonesia tapi masih memiliki efisiensi yang rendah. Untuk meningkatkan efisien sistem PV dapat dioptimalisasi pada MPPT dan konverter DC-DC. Pada skripsi ini membahas tentang rancang bangun converter dc-dc penaik atau penurun tegangan tipe Cuk dengan tegangan keluaran 14 V dengan frekuensi switching 32 kHz. Perancangan awal konverter Cuk dilakukan dengan desain menggunakan aplikasi Eagle. Perancangan dan pembuatan alat konverter ini bertujuan untuk menstabilkan tegangan keluaran dc sesuai dengan yang diinginkan oleh set-point, dengan tegangan masukan dc yang bervariasi dan menggunakan parameter P proporsional dan I integral untuk mengontrol tegangan keluaran. Konverter dc-dc tipe Cuk menaikkan dan menurunkan tegangan dengan switching MOSFET (Metal Oxide Semiconductor Field Effect Transistor) yang berfungsi sebagai saklar untuk mengatur tegangan keluaran dan diteruskan bagian induktor dan kapasitor yang kemudian disalurkan ke beban. Nilai tegangan keluaran dapat diatur dari lebar pulsa dan duty cycle dari pemrograman microcontroller Arduino. Hasil dari perancangan dan pembuatan alat konverter dc-dc tipe Cuk dapat bekerja pada tegangan input 12-18 volt dengan set-point tegangan output Cuk konverter 14 volt.
El cine como herramienta didáctica para la inclusión del elemento cultural en la clase de inglés como lengua extranjera
Authors: Álvarez-Gil Francisco J. , Alonso-Almeida Francisco 
Published: June 2022

En el presente estudio se realiza una propuesta didáctica para la introducción del componente cultural en la enseñanza del inglés como lengua extranjera utilizando el cine como herramienta didáctica. El uso de fragmentos de diferentes películas tendrá como resultado una clase más atractiva para los alumnos con una visión novedosa y diferente y, al mismo tiempo, promovemos el desarrollo de la capacidad investigadora del alumnado desde la etapa de educación obligatoria. En este estudio se realiza una propuesta metodológica donde, basándonos en el marco teórico presentado, se ofrecen algunos ejemplos de actividades basadas en el empleo del cine como principal herramienta de enseñanza.
Relações dialógicas e cronotopo no romance espírita O Mundo que Encontrei, ditada pelo espírito de Luiz Sérgio
Authors: Januário Nícolas Vladimir de Souza , Ludovice Camila de Araújo Beraldo 
Published: June 2022

O romance espírita O mundo que encontrei narra as experiências de um jovem de 23 anos, após deixar seu corpo físico. A narrativa apresenta descrições do mundo espiritual de maneira amena e despretensiosa, dentre outras situações além-túmulo que fazem parte da doutrina kardecista. Obra de sucesso imediato na comunidade espírita, apresenta elucidações de cunho doutrinário pelo viés da aceitação da vida após a morte física. Nesse contexto, em percurso metodológico, temos a obra mencionada como nosso objeto de pesquisa e a partir dela, buscamos de maneira efetiva a compreensão das relações dialógicas e do cronotopo que contribuem para verificar como uma “obra espírita”, além de se enquadrar no gênero discursivo romance, apresenta relações entre narrador e leitor-virtual, bem como o entendimento do espaço e tempo representados.
Palavras-chave: Romance Espírita. Relações dialógicas. Cronotopo.
A importância da oficina de escrita no Ensino Fundamental
Authors: Andrade Fabíola Fernandes , Girotto Cyntia Graziella Guizelim Simões 
Published: June 2022

Este artigo, resultante de uma revisão bibliográfica e de uma experiência no quinto ano do Ensino Fundamental em uma escola municipal de Fortaleza durante o ano de 2015, possui como objetivo refletir sobre a importância da oficina de escrita no Ensino Fundamental. O estudo é norteado por Calkins (1989), Jolisbert (1994), Rhodes e Dudley-Marling (1996) e Goodland (1984). Para formação de escritores autônomos, os professores podem solicitar a produção de texto diariamente e sugerir temas relacionados com a vida das crianças. Assim, a produção de texto terá sentido para os discentes, uma vez que as vidas deles são importantes e tê-la como tema despertará motivação e interesse pela produção de texto.
Português como língua adicional para hispano-falantes: uma proposta a partir do ensino de línguas baseado em tarefas
Authors: Guizzo Antonio Rediver , Fioravanti Fernanda Gabina Alvarenga , Oyarzo Paula Mackarena Miranda 
Published: June 2022

A Universidade Federal da Integração Latino-Americana (UNILA) acolhe estudantes de países latino-americanos e da região do Caribe em seus cursos de graduação e pós-graduação. Nesse contexto, o objetivo da pesquisa é investigar opções didáticas que possibilitem aquisição de competências em Português Adicional e forneçam suporte linguístico e cultural aos estudantes para a realização de tarefas (ações comunicativas reais) em contextos universitários variados. No artigo, apresenta-se o trabalho desenvolvido a partir da tarefa “apresentação”, as opções didáticas realizadas, os materiais selecionados, as atividades propostas (pré-tarefas e tarefas) e alguns dos resultados obtidos. A pesquisa é financiada pela instituição por meio de bolsas de iniciação científica.
A CONSTITUIÇÃO DA DIALOGIA EM BAKHTIN E FREIRE: CONVERGÊNCIAS DISCURSIVAS EM PRODUÇÕES TEXTUAIS DO GÊNERO AUTOBIOGRÁFICO COM ALUNOS DA EJA
Authors: Cardoso Elma Karine Costa , Gusmão Maria Aparecida Pacheco 
Published: June 2022

Este texto tem por objetivo apresentar os resultados de um estudo sobre a produção textual de textos autobiográficos dos alunos da Educação de Jovens e Adultos. A pesquisa foi realizada em uma escola pública estadual da cidade de Vitória da Conquista, Bahia. As narrativas autobiográficas dos alunos foram produzidas com atividades interventivas com vistas a trabalhar categorias previamente estabelecidas. Neste artigo, abordamos três dessas categorias. A análise dos dados das produções iniciais e finais de textos autobiográficos apontou para um crescimento em três categorias, pois os educandos representaram os elementos estruturais do gênero, apontaram as várias vozes discursivas constituídas na interação social e também evidenciaram a importância da escola como meio de libertação e empoderamento social.
Baseline 4D Flow-Derived in vivo Hemodynamic Parameters Stratify Descending Aortic Dissection Patients With Enlarging Aortas
Authors: Chu Stanley , Kilinc Ozden , Pradella Maurice , Weiss Elizabeth , Baraboo Justin , Maroun Anthony , Jarvis Kelly , Mehta Christopher K. , Malaisrie S. Chris , Hoel Andrew W. , Carr James C. , Markl Michael , Allen Bradley D. 
Published: June 2022

PurposeThe purpose of our study was to assess the value of true lumen and false lumen hemodynamics compared to aortic morphological measurements for predicting adverse-aorta related outcomes (AARO) and aortic growth in patients with type B aortic dissection (TBAD).Materials and MethodsUsing an IRB approved protocol, we retrospectively identified patients with descending aorta (DAo) dissection at a large tertiary center. Inclusion criteria includes known TBAD with ≥ 6 months of clinical follow-up after initial presentation for TBAD or after ascending aorta intervention for patients with repaired type A dissection with residual type B aortic dissection (rTAAD). Patients with prior descending aorta intervention were excluded. The FL and TL of each patient were manually segmented from 4D flow MRI data, and 3D parametric maps of aortic hemodynamics were generated. Groups were divided based on (1) presence vs. absence of AARO and (2) growth rate ≥ vs. &lt; 3 mm/year. True and false lumen kinetic energy (KE), stasis, peak velocity (PV), reverse/forward flow (RF/FF), FL to TL KE ratio, as well as index aortic diameter were compared between groups using the Mann–Whitney U or independent t-test.ResultsA total of n = 51 patients (age: 58.4 ± 15.0 years, M/F: 31/20) were included for analysis of AARO. This group contained n = 26 patients with TBAD and n = 25 patients with rTAAD. In the overall cohort, AARO patients had larger baseline diameters, lower FL-RF, FL stasis, TL-KE, TL-FF and TL-PV. Among patients with de novo TBAD, those with AAROs had larger baseline diameter, lower FL stasis and TL-PV. In both the overall cohort and in the subgroup of de novo TBAD, subjects with aortic growth ≥ 3mm/year, patients had a higher KE ratio.ConclusionOur study suggests that 4D flow MRI is a promising tool for TBAD evaluation that can provide information beyond traditional MRA or CTA. 4D flow has the potential to become an integral aspect of TBAD work-up, as hemodynamic assessment may allow earlier identification of at-risk patients who could benefit from earlier intervention.
Carbon Isotope Composition and Geochemical Features of Sediments From Gongga Mountain, China, and Potential Environmental Implications
Authors: Wu Yingqin , Wang Tong , Liu Yan , Ma Rong , Chen Zhangxin 
Published: June 2022

Using gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS/MS), the soluble organic matter was analyzed for the first time in twenty-two sediment samples from the eastern slopes of the Gongga Mountain, China, at high altitudes between 4,600 and 6,700 m. The C11-C33n-alkanes and C9-C33n-alkan-2-ones were identified in these samples. Both compounds were dominated by odd carbon numbers in the long-chain molecules and contained a maximum of n-C27 or n-C29, indicating that the sediments were predominantly of higher plant origin. However, the short-chain n-alkan-2-ones, with a maximum content of n-C17 or i-C18 (phytone, 6, 10, 14-trimethylpentadecan-2-one), did not show a predominance of odd and even numbers, suggesting that they were predominantly derived from bacteria and algae. Therefore, we suggest that the organic matter in Gongga Mountain comes from three sources, i.e. bacteria, algae, and higher plants. Stable carbon isotope (δ13C) values ranged from −24.6‰ to −27.3‰, indicating that C3 plants were the dominant organic input to the sediments and suggesting a relatively colder and drier depositional environment. However, C4 plants increase sharply at high altitudes of 6,300–6,600 m, suggesting that the paleoclimate of Gongga Mountain became drier and wetter with the increase of altitude.
Real-World Evidence on the Sensitivity of Preoperative Ultrasound in Evaluating Central Lymph Node Metastasis of Papillary Thyroid Carcinoma
Authors: Yao Fan , Yang Zhongyuan , Li Yixuan , Chen Weichao , Wu Tong , Peng Jin , Jiao Zan , Yang Ankui 
Published: June 2022

IntroductionGuidelines for prophylactic dissection in clinical central negative node (cN0) of papillary thyroid carcinoma vary among different countries due to the uncertainty on the benefit of dissection. The Chinese guidelines recommend prophylactic central compartment lymph node dissection (pCLND) under professional technology. Preoperative ultrasound (US) evaluation of central lymph node determines the surgical strategy used. Sensitivity differs significantly when US is conducted by different physicians even in diverse hospitals. In this study, the aim was to explore why the Chinese guidelines were different from the America Thyroid Association (ATA) guidelines through the real-world evidence on the preoperative diagnosis of cN0.MethodsPreoperative US and surgical pathology data for 1,015 patients with PTC attending 13 Grade-A tertiary hospitals in 2017 were collected. A retrospective analysis using US assessment of CLNM was the conducted to explore the benefits of this approach in China. US physicians in our hospital were trained on scanning the thyroid gland and its regional lymph nodes in normalization. Data of 1,776 patients were collected under the same condition from 2012 to 2017, whose ultrasonography was performed by diverse physicians and doctors. Further, data of 339 patients evaluated by the same sonographer and operated by the same surgical team was collected between 2015 and 2017. In this set of data, US combined CT versus US alone was compared. Patients were grouped into metastasis group and non-metastasis group based on postoperative pathological diagnosis of CLNM. Diagnostic efficacy of US was evaluated.ResultsA total of 925 patients who underwent preoperative ultrasonography in central lymph node, including 825 cases who underwent thyroidectomy and central lymph node dissection were included in this study. The sensitivity of ultrasonography in detecting CLNM was 23.18%, with occult metastasis rate of 40.8%. Data for 1,776 patients comprising paired ultrasonic report and pathological report were collected in our hospital, whose physicians underwent standardized training. The sensitivity was 37.58%. Furthermore, specialized evaluation showed high sensitivity in US/CT (84.58%) than US (58.21%) alone.ConclusionAlthough the sensitivity of US could be enhanced by standardized training and combination with CT, the prevalence of low sensitivity of US in real-world multicenter data and the high occult metastasis rate indicated that the Chinese guidelines were based on the current conditions.
Uveal Effusion Syndrome: Clinical Characteristics, Outcome of Surgical Treatment, and Histopathological Examination of the Sclera
Authors: Zhou Nan , Yang Lihong , Xu Xiaolin , Wei Wenbin 
Published: June 2022

PurposeIn this study, we aimed to investigate clinical characteristics and histopathology and evaluate surgical outcomes of quadrantic lamellar-sclerectomy with sclerostomy for uveal effusion syndrome (UES).DesignRetrospective, cohort study.ParticipantsOverall, 106 eyes of 66 patients diagnosed with UES were treated at the Beijing Tongren Hospital between January 1, 2001 and June 26, 2021.MethodsPatients were examined by routine ophthalmologic examinations, fluorescein and indocyanine green angiography (FFA/ICGA); axial length determination; color Doppler ultrasound (CDU); ultrasound biomicroscopy (UBM), optical coherence tomography (OCT), and optical coherence tomographic angiography (SD/SS-OCTA). Quadrantic lamellar-sclerectomy with sclerostomy was performed at the equator in all patients and histopathological examination of the excised sclera was analyzed in all samples.Main Outcome MeasuresThe reattachment of the choroid and retina with resolution of the serous fluid, best corrected visual acuity (BCVA), choroidal thickness, and recurrence of ciliochoroidal detachment were the main outcome measures.ResultsTwo subgroups were identified: (1) type 1 (nanophthalmic eye), wherein the eyeball was small (average axial length 15.83 ± 1.45 mm) with high hypermetropia (average 12.6 diopters) and (2) type 2 (non-nanophthalmic eye), wherein the eyeball size was normal (average axial length 23.45 ± 1.68 mm) with or without refractive error, combined with or without systemic symptoms. Histopathologically, types 1 and 2 demonstrated similarly abnormal sclera with the disorganization of collagen fiber bundles and deposits of proteoglycans in the matrix. Quadrantic lamellar-sclerectomy with sclerostomy was effective in both types 1 and 2, inducing post-operative resolution of the subretinal fluid accumulation and increasing the useful BCVA. The choroidal thickness was significantly different before and after surgery (P &lt; 0.05). Approximately 98.1% of cases attained permanent reattachment within 6 months after one operation through this procedure. The single operation success rate was 96.2%, and success with one or two operations was 100%.ConclusionsUES is caused by abnormalities of the sclera and increased resistance to transscleral fluid outflow, combined with increased choroidal thickness. Quadrantic lamellar-sclerectomy with sclerostomy is an effective treatment for UES that can rescue correct the useful visual acuity.
A Novel Clinical Score for Differential Diagnosis Between Acute Myocarditis and Acute Coronary Syndrome – The SAlzburg MYocarditis (SAMY) Score
Authors: Mirna Moritz , Schmutzler Lukas , Topf Albert , Sipos Brigitte , Hehenwarter Lukas , Hoppe Uta C. , Lichtenauer Michael 
Published: June 2022

BackgroundAcute myocarditis and acute coronary syndrome (ACS) are important differential diagnoses in patients with new-onset chest pain. To date, no clinical score exists to support the differentiation between these two diseases. The aim of this study was to develop such a score to aid the physician in scenarios where discrimination between myocarditis and ACS appears difficult.Materials and MethodsPatients with ACS (n = 233) and acute myocarditis (n = 123) were retrospectively enrolled. Least absolute shrinkage and selection operator (LASSO) regression was conducted to identify parameters associated with the highest or least probability for acute myocarditis. Logistic regression was conducted using the identified parameters and score points for each level of the predictors were calculated. Cutoffs for the prediction of myocarditis were calculated. Validation was conducted in a separate cohort of 90 patients.ResultsA score for prediction of acute myocarditis was calculated using six parameters [age, previous infection, hyperlipidemia, hypertension, C-reactive protein (CRP), and leukocyte count]. Logistic regression analysis showed a significant association between total score points and the presence of myocarditis (B = 0.9078, p &lt; 0.0001). Cutoff #1 for the prediction of myocarditis was calculated at ≥ 4 (Sens.: 90.3%, Spec.: 93.1%; 46.3% predicted probability for acute myocarditis), cutoff #2 was calculated at ≥ 7 (Sens.: 73.1%, Spec.: &gt; 99.9%; 92.9% pred. prob.). Validation showed good discrimination [area under the curve (AUC) = 0.935] and calibration of the score.ConclusionOur clinical score showed good discrimination and calibration for differentiating patients with acute myocarditis and ACS. Thus, it could support the differential diagnosis between these two disease entities and could facilitate clinical decisions in affected patients.
Case Report: A Case of Cystoid Macular Edema in Retinitis Pigmentosa With Central Retinal Vein Occlusion
Authors: Wang Da-Hu , Gu Cao , Yuan Yuan-Zhi 
Published: June 2022

SignificanceCystoid macular edema (CME) is a common complication of retinitis pigmentosa (RP). However, CME in RP with central retinal vein occlusion (CRVO) is rare. Prompt administration of anti-vascular endothelial growth factor (anti-VEGF) medication can achieve a satisfactory prognosis.PurposeThis report describes a case of using anti-VEGF medication to treat CME secondary to RP with impending or mild CRVO.Case ReportA 26-year-old female presented for blurred vision in both eyes. Best-corrected visual acuity (BCVA) was 20/50 in the right eye and finger-counting in the left eye. According to ophthalmic examinations, CME secondary to RP in the right eye and CME secondary to RP with impending or mild CRVO in her left eye can be diagnosed. Central macular thickness (CMT) was 554 μ m in the right eye and 831 μm in the left eye. Only the left eye was treated with a single intravitreal injection of anti-VEGF medication. One month later, BCVA increased to 20/200 and CMT decreased to 162 μm in the left eye. Interestingly, BCVA in the right eye also had an improvement (20/40) and intraretinal fluid decreased significantly. However, 3 months after injection, these improvements of both eyes were not maintained.ConclusionThis is the second case of RP with CRVO. Intravitreal injection of anti-VEGF medication for addressing CME secondary to RP with CRVO is an effective treatment, but it needs to be reinjected.