bluuebunny/crossref_metadata_2025_split huggingface dataset:
Authors: Linggot Fritson , Rampe Meytij , Kumajas Jenny 
Published: March 2022

Penelitian ini adalah penelitian eksperimen dengan model Pembelajaran Ketuntasan (Mastery Learning). Penelitian ini bertujuan untuk mengetahui pengaruh model Mastery Learning pada hasil belajar siswa pada materi konsep mol. Penelitian ini dilakukan di kelas X SMA Negeri 1 Remboken dengan jumlah sampel 57 orang. Desain penelitian yang digunakan adalah metode eksperimen post-test-only control group design. Kelas eksperimen menggunakan model pembelajaran ketuntasan dan kelas kontrol menggunakan model pembelajaran konvensional. Analisis pengujian hipotesis menggunakan uji-t dengan taraf signifikan = 0,05, karena dengan uji dua arah maka nilai a/2 = 0,025. Hasil pengujian yang diperoleh menunjukkan bahwa hasil t hitung > t tabel atau 9,02 > 2,05, dengan demikian H0 ditolak dan H1 diterima, ini menunjukkan bahwa terdapat perbedaan yang signifikan antara nilai rata-rata (post-test) kelompok eksperimen dan kelompok eksperimen kelompok kontrol. Maka dapat disimpulkan bahwa terdapat perbedaan rata-rata hasil belajar siswa yang diajari model pembelajaran tuntas (Mastery Learning) dengan hasil belajar siswa yang diajari pembelajaran konvensional pada materi konsep mol.
Authors: Tangka Gracesela , Tani Djefry 
Published: March 2022

Tujuan dari penelitian ini adalah untuk mengetahui peningkatan hasil belajar siswa kelas XI MIA 1 di SMA N 1 Likupang pada materi larutan asam basa dengan menggunakan laboratorium virtual berbasis PhET. Penelitian ini adalah penelitian kuantitatif menggunakan metode eksperimen dengan menggunakan desain one-group pretest-posttest design. Sampel dalam penelitian ini adalah kelas XI MIA 1 sebagai kelas eksperimen yang berjumlah 30 orang siswa. Pengambilan data dilakukan dengan memberikan pretest sebelum proses pembelajaran dilaksanakan dan posttest setelah proses pembelajaran. Data hasil penelitian yang diperoleh berupa selisih nilai rata-rata pretest dan posttest pada kelas eksperimen adalah 45,3. Dengan rata-rata nilai pretest yaitu 40,7 sedangkan rata-rata nilai posttest yaitu 86. Sebelum dilakukan uji one sample t test terlebih dahulu dilakukan uji normalitas dan didapatkan bahwa data berdistribusi normal. selanjutnya diuji dengan uji-t, hasil yang didapat yaitu = 2,001. Dengan demikian dapat disimpulkan bahwa Terdapat peningkatan hasil belajar siswa pada penerapan media pembelajaran laboratorium virtual berbasis PhET pada materi larutan asam basa di SMA Negeri 1 Likupang.
Authors: Mangirang Merly Mira , Tengker Soenandar 
Published: March 2022

Tujuan dari Penelitian ini adalah untuk mengetahui Pengaruh Penerapan Video Pembelajaran melalui Google Classroom Terhadap Hasil Belajar siswa X Mipa 4 di SMA N 1 Langowan. Penelitian ini adalah penelitian kuantitatif menggunakan metode experiment dengan menggunakan desain One-Group pretest-posttest design. Populasi yang diambil adalah seluruh kelas X MIPA SMA N 1 Langowan sampel terdiri dari 1 kelas yaitu X MIPA 4 Sebagai kelas eksperimen yang berjumlah 32 orang siswa. Pengambilan data dilakukan dengan memberikan pretest sebelum proses pembelajaran dilaksanakan, dan posttest setelah proses pembelajaran. Data Hasil penelitian yang diperoleh berupa selisih pretest dan posttest pada kelas eksperimen 40,4 dan rata-rata pretest yaitu 47,7, sedangkan rata-rata posttest yaitu 88.1, Sebelum di lakukan uji one sample t test terlebih dahulu di lakukan uji normalitas dan di dapatkan bahwa data terdistribusi normal. Selanjutnya uji melalui uji-t, hasil yang didapat antara kelas eksperimen signifikan yaitu thitung thitung = 18,60 > ttabel = 1,998. Dengan demikian dapat disimpulkan bahwa media pembelajaran Google Classroom yang berisikan Video dapat berpengaruh pada hasil belajar siswa.
Authors: Rondonuwu Junike , Lombok Johny Zeth 
Published: March 2022

Pembelajaran Blended Learning adalah pembelajaran campuran yaitu pembelajaran yang secara daring maupun secara tatap muka. Karena masih dalam masa pandemic Covid-19, maka pembelajaran saat ini masih dilaksanakan secara Daring (Online). Untuk mendukung proses pembelajaran Daring, maka digunakan aplikasi Zoom Cloud Meeting. Proses belajar pun bisa dilaksanakan secara luring namun sesuai dengan protocol dari pemerintah. Penelitian ini bertujuan untuk mengetahui hasil belajar siswa setelah diberikan perlakuan dapat melebihi nilai KKM. Penelitian menggunakan eksperimen dengan desain penelitian one shoot case study. Penelitian ini dilaksanakan di SMA Negeri 1 Tutuyan tahun ajaran 2020/2021 dengan jumlah siswa 29 orang pada kelas X MIA 1. Teknik Pengumpulan data adalah posttest dan instrument yang digunakan untuk mengukur hasil belajar merupakan tes pilihan ganda. Hasil penelitian ini menggunakan uji-t one sample t-test dengan mendapat hasil ttabel 1,701 dan thitung 28.8476 dengan taraf signifikan 5% dan oleh karena itu ttabel lebih kecil dari thitung. Dengan demikian, berarti H1 diterima dan H0 ditolak. Sehingga disimpulkan bahwa hasil belajar siswa setelah di beri perlakuan dapat meningkat dan melebihi nilai KKM.
Pembelajaran Berbasis Kecerdasan Majemuk dalam Pendidikan Anak Usia Dini
Authors: Ardiana Reni 
Published: March 2022

Kecerdasan tidaklah dapat diukur hanya berdasarkan pada tes kecerdasan akademik atau IQ saja, melainkan dengan melihat kemampuan seseorang dalam menyelesaikan setiap permasalahan (problem solving) dan kemampuan dalam menciptakan produk baru yang memiliki nilai budaya (creativity). Tujuan penelitian ini adalah memberikan pengetahuan pembelajaran berbasis kecerdasan majemuk dalam Pendidikan anak usia dini, dan penerapan pembelajaran berbasis kecerdasan majemuk anak usia dini. Dengan kecerdasan tersebut peserta didik dapat menyesuaikan diri dan belajar dari pengalaman. Menurut Gardner, model pembelajaran ini adalah model pembelajaran yang menggunakan dan menerapkan teori inteligensi ganda yang perlu dipersiapkan dan dirancang dengan baik sebelum proses pembelajaran dilaksanakan Penelitian ini menggunakan metode kualitatif jenis deskriptif. Hasil dari penelitian ini menunjukkan bahwa pembelajaran berbasis kecerdasan majemuk dalam PAUD menuntut pendidik harus memiliki kreativitas yang cukup baik dengan menggunakan berbagai metode yang bervariasi dan menunjukkan bahwa penerapan pembelajaran berbasis kecerdasan majemuk dalam PAUD untuk meningkatkan keaktifan serta kreatifitas pendidik dan anak didik.
Bihemispheric ischemic strokes in patients with COVID-19
Authors: Kurian Christeena , Mayer Stephan , Kaur Gurmeen , Sahni Ramandeep , Feldstein Eric , Samaan Mena , Viswanathan Divya , Sami Tamarah , Ali Syed Faizan , Al-Shammari Hussein , Bloomfield Jessica , Bravo Michelle , Nuoman Rolla , Gulko Edwin , Gandhi Chirag D. , Al-Mufti Fawaz 
Published: March 2022

BACKGROUND:
There is emerging evidence that COVID-19 can trigger thrombosis because of a hypercoagulable state, including large-vessel occlusion ischemic strokes. Bihemispheric ischemic stroke is uncommon and is thought to indicate an embolic source. Here, we examine the findings and outcomes of patients with bihemispheric stroke in the setting of COVID-19.

METHODS:
We performed a retrospective cohort study at a quaternary academic medical center between March 1, 2020, and April 30, 2020. We identified all patients with laboratory-confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection who presented with simultaneous bihemispheric ischemic strokes.

RESULTS:
Of 637 COVID-19 admissions during the 2-month period, 13 had a diagnosis of acute ischemic stroke, including 5 who developed bihemispheric cerebral infarction. Three of those 5 (60%) were female, median age was 54 (range 41–67), and all five were being managed for severe COVID-19-related pneumonia complicated by acute kidney injury and liver failure before the diagnosis of cerebral infarction was established. Five presented with elevated ferritin, lactate dehydrogenase, and interleukin-6 (IL-6) levels, and four had lymphopenia and elevated D-dimer levels. All patients underwent neuroimaging with computed tomography for persistent depressed mentation, with or without a focal neurologic deficit, demonstrating multifocal ischemic strokes with bihemispheric involvement. Outcome was poor in all patients: two were discharged to a rehabilitation facility with moderate-to-severe disability and three (60%) patients died.

CONCLUSIONS:
Stroke is implicated in SARS-CoV-2 infection. Although causality cannot be established, we present the imaging and clinical findings of patients with COVID-19 and simultaneous bihemispheric ischemic strokes. Multifocal ischemic strokes with bihemispheric involvement should be considered in COVID-19 patients with severe infection and poor neurologic status and may be associated with poor outcomes.
Neurological deterioration and computed tomography perfusion changes with increased time to peak in lacunar stroke
Authors: Farooqui Amreen , Albayram Mehmet S , Reddy Varalakshmi Ballur Narayana , Nagaraja Nandakumar 
Published: March 2022

OBJECTIVES:
Lacunar strokes can have fluctuations and progression in the acute period leading to poor outcomes. Our study sought to evaluate if, in lacunar strokes, neurological deterioration (ND) was associated with blood pressure (BP) variations, stroke size, or increased time to peak (TTP) on admission computed tomography perfusion (CTP).

METHODS:
Patients with lacunar stroke who had magnetic resonance imaging and CTP performed were enrolled in the study. ND was defined as ≥1-point worsening on a modified National Institutes of Health Stroke Scale (NIHSS) score or the Medical Research Council scale compared to baseline assessment. The difference in BP between the day of admission and the day of ND was calculated. Multivariate logistic regression analysis, adjusted for pertinent clinical and imaging covariates, was performed to determine predictors of ND.

RESULTS:
Among 409 patients screened, 49 were eligible for the study. There was no difference in age, gender, race, medical history, admission BP, and the modified NIHSS score between patients with and without ND. In unadjusted analysis, patients with ND tended to have increased TTP in the stroke area compared to the control (12 [63%] vs. 11 [37%], P = 0.07). On multivariate analysis adjusted for covariates, presence of an increased TTP on CTP was a predictor of ND (odds ratio [95% confidence interval] = 4.80 [1.15–20.10], P = 0.03).

CONCLUSION:
The presence of an increased TTP on CTP corresponding to the stroke lesion on diffusion-weighted imaging is a predictor of ND in patients with lacunar stroke. Larger studies are needed to confirm our findings.
Elliptical Patch Microstrip Antenna for Bluetooth/Wi-Fi Applications
Authors: Kurt Hilal , Kaya Adnan 
Published: March 2022

In the wireless communication applications, widespread usage of microstrip patch antennas due to their advantages such as compactness, easy fabrication and low cost, is pushed forward researchers to develop desired antennas or improve the existing antennas to get desired one. But it is challenging to get desired antennas since microstrip patch antennas have some disadvantages such as low gain and narrow bandwidth. In this work, elliptical patch microstrip antenna is designed for Bluetooth/Wi-Fi applications. The antenna is designed in the form of slotted elliptical patch and defected ground structure method. Defected ground structure method is applied by using rectangular slots with different dimensions in this work. The proposed antenna is modelled using CST MWS software. Return loss, gain and directivity values are -16.45 dB, 1.82 dBi, and 5.81 dBi at 2.45 GHz, respectively. On the other hand, maximum directivity and gain values are 5.86 dBi and 2.06 dBi at 2.4 GHz, respectively. The bandwidth is 63.1 MHz (2.41 GHz – 2.48 GHz) at 2.45 GHz. According to the results, IEEE 802.11 b/g standards are supported by the designed antenna. So, it can be used for Bluetooth and Wi-Fi applications at 2.4 GHz.
Triband Microstrip Rectangular Patch Antenna for Bluetooth/WiFi Applications
Authors: Kurt Hilal , Kaya Adnan 
Published: March 2022

In recent years, according to the requirements of wireless applications, multiband and low profile patch antennas are desired. In this study, a simple rectangular patch triband microstrip antenna is developed to use for Bluetooth/WiFi applications. The antenna is in the form of rectangular slots with different lengths loaded on the rectangular patch with reduced ground size. FR-4 substrate with 1.6 mm thickness is used as substrate material and annealed copper is used as ground and patch materials. The designed antenna is simulated using CST MWS software program. Microstrip line feeding technique with discrete port is used to feed the antenna. According to the results, S11 parameters of three resonant frequencies can be given as -15.08 dB, -11.88 dB and -24.03 dB at 2.39 GHz, 3.07 GHz and 4.92 GHz respectively. Gain values of the resonance frequencies can be given as follows, 2.25 dBi, 3.76 dBi and 1.92 dBi at 2.39 GHz, 3.07 GHz and 4.92 GHz respectively. Proposed antenna bandwidth can be given as, 197.5 MHz (2.29 GHz – 2.49 GHz) at 2.39 GHz, 116.1 MHz (3.01 GHz – 3.13 GHz) at 3.07 GHz and 266.2 MHz (4.79 GHz – 5.06 GHz) at 4.92 GHz, respectively. Since the designed antenna can work at 2.4 GHz and 5 GHz frequency bands with 2.24 dBi and 2.34 dBi, respectively, IEEE 802.11ac/b/g standards are supported by the antenna. So the proposed antenna can be used for Bluetooth and 2.4 GHz/5GHz WiFi applications.
Microscopic and Physiological Analysis of Somatic Embryos Under in Vitro Culture in Triticale
Authors: SIMSEK GEYIK Merve , YAZICILAR Busra , Bezirganoglu İsmail 
Published: March 2022

Somatic embryogenesis is a developmental process during which plant somatic cells, under in vitro conditions, produce embryogenic cells that develop into somatic embryos. Somatic embryogenesis is an efficient method clonal propagation in vitro of plants. Mature embryos were used as explant source for embryogenic callus formation and the callus produced compact, healthy and most mature embryos were induced embryogenic callus. Somatic embryos showed a similar morphologically to their non-somatic counterparts in their development. In a comparative study, total protein, DNSA and activities of some antioxidant enzymes including H2O2, MDA of somatic embryos of three triticale cultivar ‘Tatlıcak, Alper Bey and Mikham’ at embryogenic callus stages were analyzed. However; somatic embryos displayed the highest level of DNSA, MDA, H2O2 and total protein in all tested cultivars. Our results showed that the triticale somatic embryo maturation process was complete within two years in vitro conditions.
Meningkatkan Kreativitas Anak Usia Dini Melalui Metode Bermain Peran
Authors: Rapiatunnisa Rapiatunnisa 
Published: March 2022

Creativity in children is indicated by independence, confidence, and skills in problem-solving. The pre-research confirmed there are students with immature creativity. This was seen in those who were not confident and did not believe in self-reliance during the learning process. This study aims to determine the extent to which the role playing method can improve the creativity of early childhood at PAUD Nurul Hilal. This study belongs to classroom action research. The subjects of this study were all students of PAUD Nurul Hilal (16 students). The data were collected through the use of tests, observation sheets, and field notes. They were then analyzed by using the P = f/N x 100 to identify the students’ creativity and the P= (post rate - base rate)/ base rate x 100% to clarify the improvement of the students’ creativity. The results show the students’ creativity in the pre-cycle was 24 (30%) “Not good”, the cycle I was 46 (57.5%) “Sufficient”, and 75 (93.75%) “Very good” in cycle II. These infer the role-playing method can improve the students’ creativity of PAUD Nurul Hilal, Sub-district of Batang Tuaka.
Analisis Angka Partisipasi PAUD Untuk Mewujudkan Pendidikan Berkualitas di Provinsi Riau
Authors: Eva Eriani  , Yolanda Anne Mudya 
Published: March 2022

Quality education can be traced back to the level of early childhood education as assessed by the participation rate in Early Childhood Education (ECE). The ECE participation rate is determined by three indicators: the School Participation Rate (SPR), the Gross Enrollment Rate (GER), and the Pure Participation Rate (PPR). However, there are still gaps in the national ECE participation rate, children who have not earned ECE services, and some villages that do not have ECE institutions. Although the Ministry of Education and Culture has established guidelines for one village one ECE. The purpose of this research is to provide an overview of ECE participation rates in Riau Province and to explain what factors influence them. This study used descriptive analysis. Secondary data were obtained from the Central Bureau of Statistics, the Ministry of Education and Culture, and the Ministry of National Development Planning/National Development Planning Agency. The results show that the ECE participation rate, in general, has been fluctuating, especially in the last five years, and that the GER of children attending ECE in Riau province is still lower than the national rate, while the PPR in rural areas is higher than the NER in urban areas. According to PER by gender, girls who attend ECE on time contribute more than boys. Those are influenced by the fact that ECE institutions are not recorded in the education database, and there are social trends that lead parents to prefer homeschooling over ECE institutions, particularly with the impact of the COVID-19.
Los orígenes del surf en Hawai. ¿La mejor campaña de marketing turístico de la historia? (The origins of surfing in Hawaii. The best tourism marketing campaign in history?)
Authors: Santos Diego 
Published: March 2022

El surf es una práctica que cada vez acapara más relevancia en nuestra sociedad. Esta práctica tiene en multitud de comunidades implicaciones socioeconómicas que son cada vez más importantes ya que el aumento de practicantes ha conllevado también un aumento de empresas que tratan de prestarles servicios. Muestra de su creciente relevancia social es que cada vez son más los medios de comunicación generalista que dan cobertura a noticias vinculadas con el deslizamiento sobre las olas, en especial, seguramente por su estética radical, a los hitos alcanzados por los surfistas que cabalgan olas gigantes. El crecimiento de practicantes de surf se vincula con la representación fenomenológica que tiene de muchos de los valores aspiracionales de la sociedad contemporánea como la libertad, la vida en la naturaleza o el hedonismo. Valores asociados al espíritu Aloha, al cual se vinculan los orígenes del surf. Sin embargo, los hallazgos realizados tras una revisión bibliográfica de varios de los principales textos bibliográficos sobre la historia y cultura surf, nos llevan a la conclusión de que parece evidente la existencia de un interés en ofrecer una visión romántica de los orígenes del surf. El nacimiento del surf, aunque muchos historiadores pretendan negarlo, es una total incógnita, sin embargo, vincularlo con raíces polinesias ha servido para moldear la imagen paradisíaca socialmente construida que el marketing ha logrado perpetuar.
Abstract. Surfing is a practice that is becoming increasingly important in our society. This practice has socioeconomic implications in many communities that are increasingly important since the increase in practitioners has also led to an increase in companies that try to provide them with services. An example of its growing social relevance is that more and more general media are covering news related to surfing the waves, especially, surely due to its radical aesthetics, the milestones reached by surfers riding giant waves. The growth of surfers is linked to the phenomenological representation that they have of many of the aspirational values of contemporary society such as freedom, life in nature or hedonism. Values associated with the Aloha spirit, to which the origins of surfing are linked. However, the findings made after a bibliographical review of several of the main bibliographical texts on the history and culture of surfing, lead us to the conclusion that the existence of an interest in offering a romantic vision of the origins of surfing seems evident. The birth of surfing, although many historians try to deny it, is a total unknown, however, linking it with Polynesian roots has served to shape the socially constructed paradisiacal image that marketing has managed to perpetuate.
Magnitud “tiempo” en Educación Infantil: su comprensión a partir de conexiones de la Expresión Corporal y la Danza con las matemáticas (Magnitude "time" in pre-school education: its understanding from connections of Body Expression and Dance with mathema
Authors: Arias García José Roberto , Fernández Díez Beatriz 
Published: March 2022

El presente artículo aborda las categorías que permiten desarrollar la idea del concepto tiempo en Educación Infantil desde campos tan diferentes como son el de la Didáctica de la Matemática, el de la Expresión Corporal y el de la Danza. El objetivo es encontrar propuestas experienciales en el ámbito de la EC y la Danza que desarrollen estas categorías centradas en estos ámbitos pero que mantienen relación con categorías similares dentro del campo de la Didáctica de las Matemáticas. Para ello, realizamos una revisión bibliográfica sistemática que, basada en las categorías ya comentadas fruto de un análisis documental de manuales de expertos en ambas disciplinas, seleccionó 30 artículos que ofrecían propuestas de trabajo experiencial del concepto tiempo. Finalmente podemos indicar que los aspectos señalados por los profesionales de la EC y la Danza de cara al desarrollo de la idea de tiempo son trabajados de una forma global en las intervenciones o propuestas de intervención, centrándose sobre todo en el contenido ritmo.
Abstract. This paper deals with the categories that allow developing the idea of the concept of time in Early Childhood Education from different fields as Mathematics Didactics, Corporal Expression and Dance. Our aim is to find experiential approaches in the field of CE and Dance that develop these categories centered in these fields, but maintaining a relationship with similar categories within the field of Didactics of Mathematics. For this purpose, we carried out a systematic bibliographic review, based on the categories as a result of a documentary analysis of expert manuals in both disciplines. After this review, we selected 30 articles that offered approaches for experiential work on the concept of time. Finally, we can indicate that the aspects pointed out by CE and Dance professionals, regarding the development of the idea of time, are worked in a global way in the intervention approaches, focusing mainly on the rhythm content. The aspects pointed out by CE and Dance professionals regarding the development of the idea of time are worked in a global way by means of the intervention approaches, focusing mainly on the rhythm content.