bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study on Effectiveness of Online Learning System during COVID-19 in Sargodha
Authors: Ijaz Hussain Ijaz Hussain , Saeed Rana Muhammad Basharat , Syed Ali Furqan
Published: January 2021

The novel coronavirus (COVID-19) is known to be the worst pandemic on the planet which has not only affected humankind very severely but also frozen all areas of life on the sphere. The pandemic caused the largest turmoil in the field of education across the world. The conventional system of education has been disrupted resulting in the closure of all educational institutions around the globe. The exams were postponed which made the students more concerned about their academic achievements. The educationists around the world started thinking about some good alternatives for this problem and subsequently considered online learning as the best substitute for conventional learning at educational institutes. The current study was carried out to accentuate the effectiveness of online learning system during the wave of COVID-19. To achieve the objective of the study, two educational institutes, one government and one private institute, were selected in Sargodha through convenient sampling and the individual perception of the participant teachers was documented using questionnaire as the data collection tool. The descriptive and inferential statistical design was followed for the analysis of the data. The overall findings revealed that the online learning was an effective and efficient system of learning to fulfill the educational needs of learners at distant locations. On the whole, the inferences supported the effectiveness of the online learning system during COVID-19.
Contrastive error analysis of Turkish EFL learners in writing
Authors: GÖK Şahin
Published: January 2021

The aim of this study is to find out to what extent Turkish EFL students make interlingual (interference) and intralingual (developmental) errors in writing at the university level. The mid-term and final examination papers of 50 Turkish EFL students were taken and their errors were categorized into interference and developmental errors. The results of our research have shown that they made a mean of %14.6 interference errors.  Thus, this proportion does not confirm the contrastive analysis hypothesis claiming that all errors are due to the negative transfer from the mother tongue. On the other hand, they made a mean of %85.4 developmental errors which are not related to L1. So the results of T?Test indicate that Turkish EFL students made significantly more (p<.001) developmental errors.
Using Project-Based Learning to Develop Social and Political Practices as Life-Long Learning Skills
Authors: El Bakkali Abdelaaziz
Published: January 2021

Recent research shows that teaching learners to maintain positive attitudes and engage in social and political practices is an important educational asset, mainly for schools that adopt project-based learning. To set an efficient background for schools to support students’ understanding of both political and social participation, important preconditions of democratic school culture form effective outcomes to generate ethical behaviors. Today, social and political measures of project-based learning in schools provide important opportunities to engage learners in life-long activities. Thus, the central aim of these measures is to promote the efficiency of decision-making within schools, which shape all classic criteria for both functioning political and social integrity. This paper aims at examining important venues that school leaders wish to implement to foster new ethical participation within and outside school life by adopting project-based learning. It attempts to unravel the timely challenges of such implementation and the different perspectives for the progress of many educational institutions. Hence, the paper adheres to a meta-analysis technique, whereby a special examination of the various already conducted studies came out with conclusions: perspectives and challenges. Owing to its generative, and diagnostic nature, this method allows the researcher to explore some pitfalls which provide potential opportunities for alternative conclusions to be adopted in well-run approaches. The major results and conclusions drawn from this paper are to be deeply and qualitatively discussed and analyzed.
Towards Environmental Justice: An Ecopoetical Reading of Ikiriko and Otto’s Poetry
Authors: Esamagu Ochuko
Published: January 2021

Ecology is a study that transcends disciplinary boundaries. It has roots in the sciences but enjoys a number of representations in the humanities, specifically through literature. Several African writers have in their imaginative works, portrayed the devastating condition of the environment in a 21st century technological-driven world and also proposed solutions to this malady. In fact, environmental degradation has become a global issue, hence, the pressing need for a lasting panacea. Attempts at literary ecocriticism in Nigerian literature have largely focused on prose fictional works and the poetry collections of older and second generation poets like Tanure Ojaide. Consequently, little research has been carried out on the representation of environmental degradation in the poetry of more contemporary poets like Ibiwari Ikiriko and Albert Otto. This paper therefore, is a critical, close reading of Ikiriko and Otto’s poetry engagement with environmental degradation. The paper adopts the notion of ecopoetry from the ecocritical theory, which accounts for poetry foregrounding questions of ethics in relation to the environment. It acts as a reminder to humans of their responsibility towards the earth and challenges the existing status-quo that has the environment and the common people at the mercy of the ruling class. In this paper, Ikiriko’s Oily Tears of the Delta and Otto’s Letter from the Earth are subjected to literary and critical analysis to examine their preoccupation with the destructive onslaught on nature, and the traumatic experiences of the marginalised. Amidst the environmental depredation, the poets express hope and revolutionary fervour towards the rejuvenation of their society.
An Investigation of the Benefits and Challenges of Graduation Internship Perceived by Students of English Language Studies
Authors: Tran Ngoc Tien , Trang Vu Thi Quynh
Published: January 2021

Graduation internship has been proved to play a vital role in students’ personal and professional development. It can also be considered a preparatory step for students to gain practical knowledge and supervised experience. However, what students encounter and how students value the internship are still debatable. This study explores how students of English Language Studies at Hoa Sen University, Vietnam, perceive the benefits and challenges of their graduation internship through a mixed-method study on 92 undergraduate students via survey questionnaires and in-depth interviews. The study employed descriptive data analysis and multiple regression to analyze quantitative data and grounded theory techniques for qualitative information. The findings show that students value graduation internship as an opportunity to enhance their personal skills and employability. The study also finds out that the difficulties students face when performing given professional tasks are insufficient personal skills and lack of professional knowledge. Additionally, results from multiple regression analysis reveal that understanding job values and confirming career aspirations have a positive correlation with perceived internship necessity while building future career plans and expanding working relationships have negative directions. The research findings can be of value for the higher educational institutions in adjusting or redesigning their programs to meet the demand of the workforce?
Improvement of English Descriptive Writing Skills Through Project Based Learning
Authors: Mulyani Dwi
Published: January 2021

This research aims to improve writing skills through the project-based learning model. The research subjects were 36 students. Data collection methods used are observation, testing, and documentation. The act of learning the first cycle of students describe a tourism place. On the second cycle, they describe a tourism place. Cycle II is more focused on linguistic and non-linguistic aspects, which are still lacking. The evaluating system that was suitable for this research was planning, implementation, and project evaluation. Improvement is indicated by the results of students' writing skills scores. The increase occurred: (1) the average value of student pre-cycle by 72,75 rose to 78,06; (2) the first cycle was 78,06 with a percentage of completeness of 50%; (3) the second cycle is 84,46 with an 84,37 % completeness percentage.
Analisis Profitabilitas dan Leverage terhadap Return Saham
Authors: Pratama Rheza
Published: January 2021

Penelitian ini bertujuan untuk mengetahui pengaruh Profitabilitas dan Leverage Terhadap Return saham Uji Full Sampel dan Sub Sampel Pada Seluruh Perusahaan Yang Terdaftar di Bursa Efek Indonesia. Sampel penelitian ini terdiri dari 161 perusahaan yang terdaftar di Bursa Efek Indonesia. Yang penentuan sampelnya ditentukan melalui purposive sampling. Penelitian ini menggunakan teknik analisis regresi berganda. Hasil dari penelitian menunjukan bahwa untuk uji full sampelnya return on equity berpengaruh terhadap return saham sedangkan debt to equity ratio tidak berpengaruh terhadap return saham pada seluruh perusahaan yang terdaftar di Bursa Efek Indonesia periode 2015-2018. Sedangkan uji sub sampelnya pada setiap industri terdapat return on equity berpengaruh terhadap return saham dan ada yang tidak berpengaruh begitu juga dengan debt to equity ratio
Pengaruh Electronic Word of Mouth terhadap Minat Beli Reservasi Hotel
Authors: Paranita Ekayana Sangkasari , Salsabila Rusyaima Farha
Published: January 2021

Penelitian ini dilatarbelakangi oleh semakin meningkatnya pengguna internet yang dimanfaatkan sebagai media promosi oleh online travel agent. Penelitian ini akan menganalisis pengaruh electronic word of mouth terhadap minat beli reservasi hotel via aplikasi Traveloka, baik dari sudut intensity, valence of opinion, maupun content. Dalam penelitian ini peneliti menggunakan metode kuantitatif. Pengumpulan data penelitian ini dengan cara menyebar kuesioner melalui google form yang didistribusikan kepada masyarakat yang sudah pernah melakukan reservasi hotel melalui aplikasi Traveloka. Metode analisis data yang digunakan adalah Regresi Linear Berganda. Hasil penelitian menunjukkan bahwa secara parsial variabel intensity dan content berpengaruh positif signifikan terhadap minat beli reservasi hotel, namun secara simultan ketiga variabel berpengaruh positif signifikan terhadap minat beli reservasi hotel.
Pengaruh model pembelajaran problem based learning terhadap hasil belajar siswa kelas X pada materi struktur atom di SMA katolik santa rosa de lima tondano
Authors: Durant Chrisly , Pongoh Emma Juline , Lumingkewas Sonny
Published: January 2021

Model pembelajaran Problem Based Learningadalah model pembelajaran berbasis masalah yang menghadapkan siswa pada permasalahan praktis untuk dipecahkan yang menitik beratkan kepadahasil akhir. Tujuan penelitian ini adalah untuk mengetahui apakah model pembelajaran Problem Based Learning pada materi struktur atom lebih baik dari model pembelajaran konvensional. Populasi dalam penelitian ini adalah seluruh siswa kelas X SMA Katolik Santa Rosa de Lima Tondano. Sampel penelitian ini adalah kelas XA dan kelas XB SMA Katolik Santa Rosa de Lima Tondano dengan jumlah siswa 30 orang, untuk kelas eksperimen 15 orang dan kelas kontrol 15 orang, pada semester genap tahun ajaran 2018/2019.Pengujian hipotesis menggunakan  uji-t untuk melihat perbedaan hasil belajar siswa antara kelas eksperimen dan kelas kontrol. Berdasarkan hasil penelitian diperoleh nilai  (4,21) >  (1,701) pada taraf nyata α = 0,05. Sehingga  ditolak dan  diterima. dimana diperoleh nilai rata-rata pada kelas eksperimen 82,66 dan nilai rata-rata untuk kelas kontrol 71,33. Maka kesimpulannya terdapat pengaruh yang positif dari pelaksanaan model pembelajaran Problem Based Learningpada materi struktur atom terhadap hasil belajar siswa di SMA Katolik Santa Rosa de Lima Tondano.
Kajian penerapan metode praktikum secara efesien pada materi korosi di SMA YPPK st. Thomas aquino Kaimana
Authors: Boce Theresia N. R. , Pongoh Emma Juline , Rumampuk Rymond Jusuf
Published: January 2021

Penerapan metode praktikum secara efisien adalah dapat membantu para pendidik agar dapat mencapai keberhasilan dalam proses pembelajaran kimia. Penelitian ini bertujuan untuk mengetahui hasil belajar siswa pada materi korosi melalui proses pembelajaran dengan menerapan metode praktikum. Penelitian ini dilaksanakan pada semester ganjil tahun ajaran 2018/2019 pada siswa kelas XII IPA di SMA YPPK St. Thomas Aquino Kaimana. Sampel yang digunakan dalam penelitian ini yaitu seluruh siswa kelas XII IPA St. Thomas Aquino. Indikator yang digunakan dalam penelitian ini adalah keberhasilan secara individu yakni apabila siswa telah mencapai nilai 75. Analisis data dalam penelitian ini digunakan teknik persentase ketuntasan belajar berdasarkan nilai hasil indikator yang diperoleh. Hasil penelitian menunjukan bahwa dari tes awal hasil belajar siswa belum mencapai ketuntasan (nilai 75) dengan persentase ketuntasanan hasil belajar sebesar 0 % dan dari tes akhir hasil belajar siswa telah mencapai kentusan (nilai > 75) dengan persentase ketuntasan hasil belajar sebesar 100%. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa hasil belajar peserta didik pada materi pokok korosi dengan metode praktikum meningkat.
Penerapan model pembelajaran inquiry training dan model pembelajaran kooperatif tipe group investigation berbantuan laboratorium mini pada hasil belajar siswa kimia di SMA
Authors: Cenik I Kadek , Lumingkewas Sonny , Mamuaja Meiske Naomi
Published: January 2021

Penelitian ini bertujuan untuk mengetahui apakah terdapat perbedaan rata-rata hasil belajar siswa yang diajarkan dengan model pembelajaran Inquiry Trainingdan model pembelajaran Group Investigationpada materi larutan elektrolit dan non-elektrolit. Penelitian ini dilaksanakan di SMA SWADHARMA WERDHI AGUNG pada semester genap 2017/2018. Metode penelitian yang digunakan adalah metode eksperimen. Pengambilan sampel dilakukan dengan teknik random sampling. Sampel dalam penelitian ini adalah siswa kelas XA sebagai kelas ekperimen I dan kelas XB sebagai kelas eksperimen II. Masing-masing sampel berjumlah 20 responden, dan total jumlah responden ada 40. Teknik pengumpulan data adalah pretest danposstestserta instrument yang digunakan untuk mengukur hasil belajar merupakan tes pilihan ganda. Analisis data posttestkedua kelompok menggunakan uji t. Hasil penelitian yang diperoleh yaitu thitungsebesar 2,233 dan ttabelpada taraf signifikan 0,05 sebesar 2,024, maka thitung > ttabel. Maka  ditolak dan  diterima. Dengan demikian disimpulkan bahwa terdapat perbedaan rata-rata hasil belajar siswa yang diajarkan menggunakan model pembelajaran Inquiry Trainingdan model pembelajaran Group Investigation.
Analysis of Students' Misconceptions Using Two-Tier Multiple Choice Diagnostic Tests on Atomic Structure Material in Remboken State High School 1
Authors: Tamungku Rivya , Tani Djefry , Tuerah Jeanne
Published: January 2021

Misconceptions can be in the form of initial concepts, mistakes, incorrect relationships between concepts, intuitive ideas or naive views. From the explanation that has been described misconception is interpreted as an initial concept owned by students that is not in accordance with the generally accepted explanation as a result of the experience constructed by students. Misconception can also be called an alternative concept. This study aims to determine the misconceptions of Class X students of Natural Sciences 2 of SMA Negeri 1 Remboken on atomic structure material. Data collection uses questions in the form of a two-tier diagnostic test, which was tested on 20 students. From the results of the study concluded that students who understood the concept of 82.75%, and students who experienced misconceptions as much as 11.25% while students who did not understand the concept of 6% in the Atomic Structure material.
Penerapan Metode POGIL Pada Materi Konsep Mol Di Kelas X IPA SMA Negeri 2 Langowan
Authors: Manampiring Gloria Viarosa , Santoso Ignatius , Kapahang Ardi
Published: January 2021

The purpose of this study was to determine the application of the POGIL method to the learning outcomes of Grade X Science students on the mole concept material.This research was implemented in class X IPA 1 and X IPA 2 SMA Negeri 2 Langowan school year 2018/2019. The method used is experimental method with post – test only control design research. In this study applied different methods on 2 classes namely POGIL class and lecture class with the number of students of each class of 23 students. Student learning Data is derived from the post-test value. Data analysis uses test-T with a significant level of α = 0.05. Analysis of student learning statistics test results obtained the value T > T table or 4.31 > 1.68. So that the H1 can be concluded accepted and H0 rejected, this shows that students ' learning outcomes with the application of the POGIL method are greater than the student learning outcomes by the lecture method on the concept of Mole material.
Studi kelayakan LKS praktikum berbasis pendekatan saintifik serta dampaknya pada hasil belajar materi sifat larutan penyangga
Authors: Demo Deysi Natalia , Waworuntu Freetje , Saiya Abdon
Published: January 2021

Penelitian ini bertujuan untuk mengetahui kelayakan produk LKS praktikum berbasis pendekatan saintifik dan mengetahui dampaknya pada hasil belajar khususnya  materi sifat larutan penyangga dengan melihat seberapa banyak siswa yang mencapai  atau melampaui KKM. Jenis penelitian ini adalah penelitian dan pengembangan yang dilakukan di kelas XI IPA 5 SMAN 1 Tondano. Berdasarkan hasil rekapitulasi, LKS praktikum berbasis pendekatan saintifik dinyatakan valid dengan nilai sebesar 83,8%. Dilihat dari respon siswa pada uji coba kelompok kecil dan kelompok besar LKS dinyatakan praktis dengan nilai berturut-turut sebesar 88,17% dan 92,98%. Dampak penggunaan LKS terhadap hasil belajar siswa adalah sebagian besar siswa pada uji coba kelompok kecil dan siswa pada uji coba kelompok besar telah melampaui KKM yang sudah ditetapkan dengan nilai ketuntasan yang diperoleh berturut-turut sebesar 66,67% dan 89,47%. Pengujian hipotesis untuk hasil belajar menggunakan uji t pihak kiri diperoleh nilai thitung(8,517) > ttabel(1,734) yang berarti terima H0 atau tolak H1. Berdasarkan hasil yang diperoleh dapat disimpulkan bahwa LKS praktikum berbasis pendekatan saintifik yang dikembangkan layak digunakan dalam proses pembelajaran.
Penerapan Penuntun Praktikum Dengan Menggunakan Metode Discovery Learning Untuk Meningkatkan Hasil Belajar Siswa Pada Materi Larutan Elektrolit Dan Nonelektrolit
Authors: Nanangkong Istiani Astari , Rumampuk Rymond , Tani Djefry
Published: January 2021

Permasalahan dalam pembelajaran kimia yaitu beragam pemahaman siswa terhadap suatu materi, siswa kurang memahami konsep kimia yang diajarkan. Tujuan penelitian ini untuk melihat hasil belajar siswa  & menerapkan penuntun praktikum dengan menggunakan metode discovery learning. Instrumen yang digunakan dalam penelitian ini adalah lembar validasi penuntun praktikum. Teknik pengumpulan data menggunakan metode wawancara, observasi dan angket. Hasil validasi dari beberapa ahli yang terdiri dari tiga validator mununjukan bahwa penuntun praktikum berada pada kategori valid dengan presentasi 86,84 . Berdasarkan hasil penelitian dapat disimpulkan bahwa hasil belajar siswa yang menggunakan penuntun praktikum dengan menggunakan metode discovery learning mencapai nilai KKM dan 70% siswa melampaui nilai KKM ( Kriteria Ketuntasan Minimal) yang ditetapkan.
Pengaruh Penggunaan Metode Case Based Instruction (CBI) terhadap Pemahaman Siswa Kelas X pada Materi Hukum-Hukum Gas di SMA Negeri 1 Tompaso
Authors: Singal Astrid Magritha , Rombang Wilson , Tani Djefry
Published: January 2021

Penelitian ini bertujuan meningkatkan pemahaman siswa yang diajarkan menggunakan metode pembelajaran CBI lebih tinggi dari pemahaman siswa yang diajarkan menggunakan metode pembelajaran konvensional. Penelitian ini dilaksanakan di SMA Negeri 1 Tompaso, sampel penelitian ini adalah kelas X MIA 2 sebagai kelas eksperimen dan X MIA 1 sebagai kelas kontrol. Dapat dilihat dari hasil uji F (One Way ANOVA)  menunjukkan bahwa Fhitung > Ftabel yaitu 11.07599 > 4.04 dan nilai probabilitas P value < 0,05 yaitu 0.001685 < 0,05 dan hasil uji t diperoleh hasil  = 3,32812   = 1,677. Jadi, Thitung  > Ttabel , maka tolak Ho dan terima H1 sehingga . Berdasarkan analisis data hasil penelitian dapat disimpulkan bahwa pemahaman siswa yang diajarkan dengan menggunakan metode pembelajaran Case Based Instruction lebih tinggi dari pada pemahaman siswa yang diajarkan menggunakan metode pembelajaran konvensional.
Hubungan Penggunaan Model Pembelajaran Langsung Dengan Sikap Siswa Dan Prestasi Belajar Siswa Pada Materi Larutan Elektrolit Dan Nonelektrolit
Authors: Bella Karmila , Rombang Wilson , Mamuaja Meiske
Published: January 2021

Telah dilakukan penelitian model pembelajaran langsung pada siswa SMA Negeri 2 Tondano di semester genap tahun ajaran 2018/2019 bulan Januari-Februari 2019. Penelitian ini bertujuan untuk mengetahui hubungan model pembelajaran langsung dengan sikap siswa dan peningkatan prestasi belajar siswa pada materi larutan elektrolit dan nonelektrolit. Penelitian ini menggunakan metode eksperimen dengan desain penelitian one group pretest-posttest design. Populasi dalam penelitian ini adalah siswa kelas X IPA SMA Negeri 2 Tondano. Pengujian validitas instrumen soal diperoleh 10 soal yang valid dan 2 soal tidak valid, sedangkan pengujian reliabilitas instrumen soal diperoleh koefisien reliabilitas 0,785. Pengujian distribusi sikap positif siswa sebelum dan sesudah perlakuan diperoleh hasil bahwa sikap positif siswa tentang pembelajaran kimia meningkat. Berdasarkan hasil presentase selisih diatas menunjukkan bahwa sikap siswa dan prestasi belajar siswa mengalami kenaikan atau peningkatan.Hasil uji normalitas menunjukkan Lhitung<Ltabel untuk kelas eksperimen (0,10< 0,17) sehingga data berdistribusi normal. Maka dapat dilakukan uji hipotesis menggunakan uji korelasi Pearson Product Moment diperoleh nilai rxy = 0,602, selanjutnya uji signifikan nilai korelasi r kedalam nilai t dengan kriteria pengujian thitung > ttabel. Dari hasil perhitungan  bahwa thitung (3.62) ttabel (2,06). Penelitian ini menyimpulkan bahwa terdapat hubungan antara model pembelajaran langsung dengan sikap siswa dan prestasi belajar siswa pada materi larutan elektrolit dan nonelektrolit.
The Effect of Learning Cycle 7E Model on Buffer Solution Subject on Learning Outcomes of Class XI Students of SMA N 2 Langowan
Authors: Repi Elra Vira , Suriani Ni Wayan , Waworuntu Freetje
Published: January 2021

The many theories, formulas, and elements that must be memorized make chemistry subjects considered complicated especially if it is not accompanied by the selection of an appropriate learning model, it certainly affects the student learning outcomes. This study aims to determine the effect of the Learning Cycle 7E learning model on buffer material on the learning outcomes of Class XI students of SMA N 2 Langowan by using independent variables (Learning Cycle 7E) and dependent variables (learning outcomes). The research sample is students of Class XI MIPA 1 and XI MIPA 2 in SMA N 2 Langowan, the sample is determined by the Simple Random Sampling technique. The research method used is Quasi Experiment Design with Posttest-only Control Group Design research design. Testing of research instruments (post test) consists of validity and reliability tests. Data analysis method uses homogeneity test, normality test and t-test. Based on the analysis of the data it was found that the sample was homogeneous and normally distributed, t-test data at the real level (α) = 0.05 was obtained tcount = 9,489 and ttable = 2,042. Because tcount> ttable, reject H0 and H1 are accepted. Based on the results of the study concluded that there was an influence of the Learning Cycle 7E learning model on the buffer solution material on the learning outcomes of Class XI students of SMA N 2 Langowan with an average learning outcome in the experimental class 80.00 and the control class 35.59.
Pengaruh Metode Pembelajaran Mind Mapping terhadap Hasil Belajar pada Pokok Bahasan Hukum-Hukum Dasar Kimia Siswa Kelas X Semester Ganjil di SMA Negeri 2 Langowan
Authors: Makarawung Frindly , Anom I Dewe Ketut , Lombok John
Published: January 2021

This research aims to determine the effect of mind mapping learning methods on the basic laws of chemistry toward learning outcomes of students of class X MIPA in SMA Negeri 2 Langowan. The sample used in this study were all students of class X MIPA of SMA Negeri 2 Langowan. This research uses an experimental method, with the research method used is Quasi Experiment  with Nonequivalent Control Group Design design. The research data were obtained from post-test results. Obtained the average value of student learning outcomes Experiment class is 85. The results showed the value of tcount = 15.7> ttable = 2.21, so H0 was rejected and H1 was accepted. Based on the results of the research it can be concluded that there is an influence on student learning outcomes on the basic laws of chemistry using mind mapping learning methods.
Efektivitas Strategi REACT Terhadap Hasil belajar Siswa Pada Materi Larutan Penyangga Di Kelas XI SMA Negeri 2 Langowan
Authors: Taidi Zurisaday , Kapahang Ardi , Mamuaja Meiske Naomi
Published: January 2021

Chemistry is a science that studies materials that are generally abstract in nature so many students find it difficult to understand the concept of chemistry which causes a lack of interaction between real life and chemical knowledge. This study aims to determine the effectiveness of the REACT strategy in improving student learning outcomes in buffering material at SMA Negeri 2 Langowan. The research method used is Quasi Experiment Design with research design is Posttest-only Control Group Design. The population is all students of class XI Science in SMA Negeri 2 Langowan even semester 2017/2018. The sample of this study were all students of class XI IPA 1, amounting to 25 people as the experimental class and all students of class XI IPA 2, amounting to 21 people as the control class. Data collected is processed from the results of Posttest. Data were analyzed using the Independent t-test formula to test the research hypotheses and obtained tcount> ttable (7.99> 2.02), so it can be concluded that the Contextual Teaching and Learning (CTL) learning method with REACT strategy proved to be effective against improving student learning outcomes in buffer material in class XI IPA of SMA Negeri 2 Langowan.
Studi Kelayakan Penuntun Praktikum Asam Basa Berbasis Bahan Lingkungan Menggunakan Model 3-D Dan Penerapan Metode Inkuiri Terbimbing Untuk Meningkatkan Hasil Belajar Siswa SMA Negeri 1 Tenga
Authors: Lumolos Gerry , Gumolung Dokri , Caroles Joice
Published: January 2021

Practicum guides are printed teaching materials that students can use in the learning process. This development research aims to determine the feasibility of an acid base-based practicum guide for environmental materials with a 3-D model and to improve student learning outcomes through practicum activities and the application of guided inquiry methods. The subject of this research was class XI IPA 1 at SMA Negeri 1 Tenga. The feasibility test for large groups has an average percentage of 88.24% which means that this practical guide is suitable for use with valid qualifications. Student learning outcomes using post test scores with the technique of statistical analysis of one sample t-test (one sample t-test). The results of the one-sample t-test hypothesis at a level of α = 5% were obtained tcount = 4.604> ttable = 1.708. The results of this study indicate that the guidelines for acid-base-based practicum for environmental materials are appropriate to be used in chemistry learning, and the use of acid-based practicum guides for environmental materials with the application of guided inquiry methods can improve student learning outcomes in acid-base material
Pembelajaran Kooperatif Tipe Game Tournament Pada Materi Ikatan Kimia di Kelas X IPA SMA Negeri 1 Kotamobagu
Authors: Mamangkai Eka Putra , Rampe Meytij , Kumajas Jenny
Published: January 2021

The purpose of this study was to determine the effect of guided inquiry-based Group The purpose of this study was to determine the effect of Team Games Tournament Cooperative learning on class X chemical bonding material at Kotamobagu 1 Public High School. This study used the experimental method and obtained samples, namely class X IPA A as the experimental class and class X IPA B as the control class. The process of collecting data by giving a test to students at the end of learning. The results showed that the average experimental class learning outcomes were higher than the control class. Based on the data analyzed using the t-test to test the research hypothesis and obtained tcount 8.95> t table 2,059, so that it can be concluded that there is a significant influence on the use of Team Games Tournament Type cooperative learning methods on learning outcomes in chemical bonding material.
Penggunaan Three-Tier Diagnostic Test Untuk Pemetaan Tingkat Penguasaan Elektrokimia Mahasiswa Kimia Semester II
Authors: Soru Elvian Anggelina , Rares Hardin Foster , Caroles Joice
Published: January 2021

Tujuan dari penelitian ini adalah untuk mengetahui peta tingkat pemahaman konsep mahasiswa kimia semester II menggunakan three-tier diagnostic test terhadap pokok bahasan elektokimia dengan pembelajaran berbasis multimedia. Pelaksanaan penelitian bertempat di Jurusan Kimia, FMIPA, UNIMA pada semester genap tahun ajaran 2018/2019. Metode penelitian yang digunakan adalah One-sho Case, dengan sampel penelitian yaitu kelas ilmu kimia angkatan tahun tertentu sebanyak 12 orang. Instrumen multimedia dibuat dengan memanfaatkan animasi dan video dari internet yang dikemas dalam Ms Power point, dan intrumen tes three-tier diagnostic elektrokimia dibuat sesuai pokok bahasan yang diajarkan. Kemudian instrumen tes divalidasi dan dihasilkan 15 butir soal. Ditemukan data peta tingkat pemahaman konsep elektrokimia yakni jumlah rata-rata mahasiswa yang paham konsep sebesar 41,6%, jumlah rata-rata mahasiswa yang mengalami miskonsepsi baik miskonsepsi (+), miskonsepsi (-) maupun miskonsepsi sebesar 30,033%, jumlah rata-rata mahasiswa kurang paham konsep sebanyak 11,1%, terdapat 8,3% mahasiswa yang kurang yakin dengan konsep yang dimilikinya, dan 8,3% terdapat mahasiswa yang tidak paham konsep elektrokimia. Dengan demikian, disimpulkan bahwa three-tier diagnostic test elektrokimia mampu mengungkap peta tingkat pemahaman mahasiswa tentang topik yang dipilih.
Analisis Logam Timbal (Pb) sebagai Pembelajaran Menggunakan Model Problem Based Learning Kabupaten Kepulauan Sangihe
Authors: Putri Theresia Kusuma , Waworuntu Freetje
Published: January 2021

The impact of the use of refined petroleum on potential pollution in mangrove allows the presence of lead metal (Pb) in the Sangihe Islands Restoration and Learning Center and the use of mangroves in the Sangihe Islands Restoration and Mangrove Learning Center as a place of learning has not been carried out to the full. Therefore, in this regard, a study was carried out by analyzing Pb metals in sediments, Gastropod shells and Bivalvia shells in the research subsystem zone of the Sangihe Islands Restoration and Mangrove Learning Center which were then designed into learning designs using a model of problem based learning. The research method used is an exploratory method. Pb metal analysis was performed using an Atomic Absorption Spectrophotometer instrument resulting in an average Pb metal in sediments was 0.402 ppm, in Bivalvia shells was 0.04283 ppm and Gastropods shells was 0.0654 ppm. Based on the results of the analysis, it can be concluded that the presence of Pb metal in sediments, Bivalvia shells and Gastropod shells then yields four main questions in the learning design with Sub-Impacts of the Use of Petroleum using the problem based learning model.
Pengaruh Model Pembelajaran Anchored Instruction terhadap Hasil Belajar Siswa
Authors: Sasindua Ravinia , Rampe Meytij , Karundeng Marlina
Published: January 2021

This research is an experimental study using the Anchored Instruction learning model. This study aims to determine the effect of the Anchored Instruction learning model on student learning outcomes on the mole concept subject. This research was conducted in class X SMA Negeri 2 Siau Timur with a sample of 40 people. The research design used was a pre-test and randomized two group design. The experimental class uses the Anchored Instruction learning model and the control class uses the conventional learning model. Analysis of the hypothesis test using t-test with a significant level α = 0.05. The test results obtained indicate that the results of tcount> ttable or 2.112> 2.024, thus H0 is rejected and H1 is accepted, this shows that there is a significant difference between the average value of the initial test (posttest) of the experimental group and the control group. So it can be concluded that there is a difference between student learning outcomes using the Anchored Instruction learning model and student learning outcomes using conventional learning models on mole concept subject.
Pengaruh Model Pembelajaran Inkuiri Terbimbing Terhadap Hasil Belajar Pada Materi Ikatan Kimia Di Man Model 1 Manado
Authors: Sulistyaningsih Dhysa Mentari , Tengker Soenandar
Published: January 2021

the purpose of this study is to there is influence average learning outcomes students who follow learning to use with those who do not use the guided inquiry model. this research was conducted in class X MAN MODEL 1 MANADO odd semester of the school year 2019/2020. this research is using an experimental method by sampling obtained class X mipa 8 as a 9 as a control class. data collection using learning outcomes test. value is with thitung 3,62 > ttabel 2,011. this means that there is a significant influence on chemical bonding material.
DETERMINATION OF RESIDUAL FUEL RESOURCE AUTOTRACTOR DIESEL EQUIPMENT BY MATHEMATICAL MODELING WITH METHOD APPLICATION SMALL DEVELOPMENTS
Authors: Anisimov Victor , Muzychuk Vasyl
Published: January 2021

The reliability of automotive internal combustion engines is a function of the reliability of their mechanisms and systems. For many years, domestic and foreign engineers have tested many auto-tractor internal combustion engines and it has been proven that if mathematical models reliably describe physical phenomena, cycles or processes that take place in engines, then the theory of small deviations for theoretical research is much better than any experiment on control characteristics and many second parameters
The theory of small deviations for fuel equipment of autotractor diesel engines is considered in the article. The method of transition from the ordinary differential equations describing the quality of diesel fuel spraying to the equations in small deviations. Equation of kinematics and hydrodynamics of precision pairs of fuel equipment in small deviations. Consumption characteristics of fuel in the process of injection in small deviations. Methods of similarity, dimension theory, mathematical statistics, and probability theory, which are used in determining the resource and predicting the operation of tractor engines. It is shown that the most practically accepted method for determining the residual life of autotractor engines is the method of mathematical statistics and probability theory. The role of mathematical modeling in determining the residual life of fuel equipment of autotractor diesel engines is established. It is also noted that it is advisable to use the small deviation method to accurately describe the processes in the fuel equipment of autotractor diesel engines.
The mathematical model is based on the known physical laws that describe the interdependencies of the two groups of parameters, control and operational, both within and between groups. The transition of the classical differential equations describing the processes of fuel supply and injection, taking into account fuel leaks in precision pairs, into equations with small deviations of parameters, is shown. The relationship between injection, fuel supply and fuel leakage is analyzed and the most influential parameters found. Impact coefficients are found and their dependencies are plotted on their corresponding parameters. Using the obtained dependencies, the influence of the technical condition of precision pairs on the effective performance of the engine is characterized. Dependences of change of injection characteristics on small deviations of parameters characterizing the technical condition of precision pairs of fuel equipment are also established.
ENERGY EFFICIENT DRYING OF SEEDS OF CEREAL CROPS
Authors: Paziuk Vadym
Published: January 2021

Many researchers at different times have been engaged in drying cereals to preserve their nutritional properties, which is associated with the biochemical properties of materials. The technologies for drying grain crops have been developed and improved with the given recommendations aimed at carrying out the drying process at high temperatures (above 100 ° C). But the increased requirements for seed grains and the associated high energy costs do not allow the drying process to be carried out efficiently, since with large grain volumes this leads to a significant increase in material costs.
The study of the laws of drying of seeds of cereals in view of improving the energy efficiency of the process is relevant. Energy efficiency is one of the main parameters influencing the choice of drying mode. In traditional technologies for drying seed material, it is dried at low temperatures, which does not allow to significantly intensify the process by increasing the temperature of the coolant, as this significantly reduces the quality of the material.
The state of the art makes it possible to more accurately investigate and analyze the drying processes of cereal seeds with automatic processing and plotting of drying kinetics. The results of previous researchers were conducted on existing grain dryers, in which it is difficult to evaluate and give the correct recommendations for drying the seed material. This is due to the peculiarities of the drying process and the design of the grain dryer.
To adequately assess the drying regimes, studies of drying seeds of cereals at low temperatures were carried out to preserve the seed properties of the material. To increase the energy efficiency of the drying process, a step-by-step descending low-temperature drying mode is proposed, which provides the required quality of seed material.
All the proposed technical solutions for the introduction of energy-efficient regimes in the process of drying grain seeds were implemented in the recommendations for industrial drying in mine direct-flow grain dryers.
KORESPONDENSI FONEMIS BAHASA SUNDA DAN BAHASA JAWA
Authors: Zakiyah Shifa Nur , Machdalena Susi , Fachrullah Tb. Ace
Published: January 2021

This article discussed the phonemic correspondence in Sundanese and Javanese using a historical comparative linguistic approach. The problem to be examined in this study is the form of phonemic correspondence in Sundanese and Javanese. The purpose of this study was to determine the phonemic correspondence sets in the comparison between Sundanese and Javanese. The method used in this research to analyze the data is the phonemic correspondence method. The correspondence method is used to find the relationship between languages ​​in the field of language sounds (phonology). Phonemic correspondence is used to determine regular phonemic changes in the languages ​​being compared. Data collection used interview techniques, note techniques and recording techniques. After the data is collected, then the data is classified according to the problem being studied and grouped into more specifics. After that, conclusions will be made based on the results of the data analysis. The data source obtained comes from 200 swadesh vocabularies in Sundanese and Javanese. From 200 swadesh vocabulary data found 49 data included in phonemic correspondence which is divided into 12 correspondence sets. The results of this study include the formation of correspondences in Sundanese and Javanese, namely, (ɛ ~ i) and (i ~ ɛ), (a ~ ɔ) and (ɔ ~ a), (d ~ D), (t ~ T) , (ɤ ~ ə), (b ~ w), (ɔ ~ u) and (ɔ ~ U), (i ~ I), (ø ~ h) and (h ~ ø), (ø ~ m), and (a ~ ə).
A COGNITIVE STYLISTIC ANALYSIS OF THE GAME “LAUNCHA LIBRE”
Authors: Kurniawan Muhammad Hafiz
Published: January 2021

Playing games are the common activities among teenagers nowadays, especially when smartphone becomes massive devices for every communication. Playing games on smartphone can be either a killing-time activity or a wasting time activity depends on the people who use that facility. However, games nowadays can be used for educational learning materials which make the students more engaged to the class. This analysis offers an insight to use the game as the one of materials in teaching linguistics. By analyzing the language use in the names of the game characters and the conceptual system of the game, this research can be brought into the linguistic class. This research not only focuses on the names of the game characters but also to the game’s conceptual system which is used to promote the Mexican culture. The research method uses the screenshot feature of smartphone to collect the data and then the data were analyzed using cognitive stylistics. The names of the characters are created mostly by using puns and the game conceptual system is built basically by using metonymy.
THE STRUGGLE TO AGAINST PATRIARCHAL DOMINANCE IN ROMEO AND JULIET DRAMA
Authors: Ambalegin Ambalegin , Sinta Sri
Published: January 2021

This research aimed to find out the form of Juliet's struggle against patriarchal dominance in a drama under the title Romeo and Juliet. The research was a descriptive qualitative research. The theory of feminism belonged to Simone de Beauvoir and Sylvia Walby to find out the patriarchal dominance. The results of this study indicated that women at that time were only seen as objects in patriarchal societies which placed the position of men, especially fathers as leaders and decision makers. This condition had an impact on limiting women's space and rights so that they unconsciously submitted and accepted it as something normal. Juliet was also a victim of male masculine dominance. She was an object to be exchanged in marriage and objects contested by men. Juliet's form of resistance also varied from making excuses for not getting married, eloping with Romeo and leaving her family, to drink the potion given by Friar Lawrence.
Existence Of Agreement In Foreign Language In The Process Of Verification In The Court
Authors: Yuhelson Yuhelson , Sinaulan Ramlani Lina , Utoyo Bambang
Published: January 2021

In line with the increasingly waning of the State borders in trade and business, then currently many trade and business agreements in Indonesia are made or entered into inforeign languages. The law has in principle governed the language of the agreement, in which the Law requires the use of the Indonesian language as the primary language of the agreement, while the secondary language may use language understood by those who do not understand the Indonesian language. The problems a rise when the parties to the agreement do not understand the language arrangements provided for by this law and use Foreign languages as the primary language even further as the only language used in an agreement. This is certainly contrary to the provisions of the law and vulnerable to create new legal problems. The method used is jurical normative, amethod that examines the application of principles or norms in positive law, which examines the legal force of agreement made in private form in a foreign language. The data used are secondary data consisting of primary, secondary and tertiary legal materials. With regard to data analysis was done by using juridical qualitative analysis method. The legal theory used is the legal certainty theory according to Jan Michiel Otto and Substantiation Theory. The results of this study is an agreement made or entered into ina foreign language has no legal substantiation before a Courtof law as they are contrary to the provisions of Article 31 of Law Number 24 of 2009. There fore the legal consequences of an agreement made in private form in a foreign language is considered to be null and void, and as a consequence, such agreement is considered never to exist.
The performance of Chlorella vulgaris growth on mass-scale cultivation
Authors: Alvateha Dini , Falentina Siska , Kasitowati Rarasrum Dyah , Suherman Sutianto Pratama , Sari Luthfiana Aprilianita , Arsad Sulastri
Published: January 2021

Phytoplankton have many benefits, including as a primary producer, natural food, bioindicator, and water pollution treatment. For this reason, their availability needs to be managed, one of which is through cultivation. The purpose of this study was to analyze the mass scale cultivation of Chlorella vulgaris. The research was conducted at the Technical Implementation Unit of Freshwater and Brackish Water Aquaculture, Situbondo, using a descriptive method. The data were analyzed statistically using MS. Excel 2016 software, and a multiple linear regression test was carried out to determine the effect of water quality parameters on the growth of C. vulgaris using the SPSS 16.0 application. The cultivation process started from strain preparation, water preparation, tank and culture media preparation, inoculation, fertilization, and then harvesting. The initial density of C. vulgaris used was 145x104 Cell. mL-1 in tank 1 and 188x104 Cell. mL-1 in tank 2. The results showed that the cell density value of C. vulgaris increased every day until it entered the exponential phase, namely on the 4th day of the culture activity, which was 507 x 104 in tank 1 and 536 x 104 Cell. mL-1 in tank 2. Furthermore, the value of water quality parameters that affected the growth of C. vulgaris in tank 1 and tank 2 was dissolved oxygen of 4.82-6.97 mg. L-1, pH 8.2-9.1, transparency of 20-45 cm, temperature was 26.8-28.2 oC, nitrate of 0.10-0.50 mg. L-1, phosphate of 0.75-2 mg. L-1, and salinity of 30-39 ppt.
Evaluation and Improvement of Thermal Energy of Heat Exchangers with SWCNT, GQD Nanoparticles and PCM (RT82)
Authors: Rostami Mohammadreza Hasandust , Najafi Gholamhassan , Motevalli Ali , Che Sidik Nor Azwadi , Harun Muhammad Arif
Published: January 2021

Today, due to the reduction of energy resources in the world and its pollutants, energy storage methods and increase the thermal efficiency of various systems are very important. In this research, the thermal efficiency and energy storage of two heat exchangers have been investigated in series using phase change materials (RT82) and single wall carbon nanotubes (SWCNT) and graphene quantum dot nanoparticles (GQD) In this research, two heat exchangers have been used in combination. The first heat exchanger was in charge of storing thermal energy and the second heat exchanger was in charge of heat exchange. The reason for this is to improve the heat exchange of the main exchanger (shell and tube) by using heat storage in the secondary exchanger, which has not been addressed in previous research. The results of this study showed that using two heat exchangers in series, the thermal efficiency of the system has increased. Also, the heat energy storage of the double tube heat exchanger was obtained using phase change materials in the single-walled carbon nanotube composition of about 3000 W. The average thermal efficiency of the two heat exchangers as the series has increased by 52%. In general, the effect of the two heat exchangers on each other was investigated in series with two approaches (energy storage and energy conversion) using fin and nanoparticles, which obtained convincing results.