Analysis of Natural Science Problem Solving Ability Judging from Self Confidence and Learning with the E-Module Assisted Discovery Learning Model Heat Transfer Materials

Tujuan dari penelitian ini untuk meningkatkan rasa percaya diri dan kemampuan pemecahan masalah siswa kelas V pada materi perpindahan panas melalui model discovery learning berbatuan e-modul. Penelitian ini menggunakan jenis penelitian mixed methods design dengan desain sekuensial eksplanatori. Teknik analisis data menggunakan analisis kuantitatif, yaitu uji t satu variabel, uji beda, uji N-Gain, dan uji regresi, kemudian dilanjut dengan analisis kualitatif dengan menggunakan wawancara mendalam, angket, tes, dan dokumentasi. Hasil penelitian kuantitatif menunjukkan bahwa: (1) Kemampuan pemecahan masalah siswa lebih dari nilai KKM yaitu 75 dengan hasil nilai thitung = 3,846 (> 1,706) dan nilai signifikansi 0,015 (< 0,05); (2) Terdapat peningkatan kemampuan pemecahan masalah yaitu sebesar 47,68% setelah pembelajaran dengan model discovery learning berbantuan e-modul ; (3) Ada pengaruh rasa percaya diri terhadap kemampuan pemecahan masalah siswa sebesar 98,7% sehingga dapat disimpulkan bahwa semakin besar rasa percaya diri siswa maka semakin tinggi kemampuan pemecahan masalahnya. Hal ini diperkuat dari hasil penelitian kualitatif yang menjelaskan bahwa tingkat Self Confidence siswa berpengaruh posittif terhadap tingkat kemampuan pemecahan masalah siswa

Determination of Trigonelline and Chlorogenic Acid (CGA) Concentration in Intact Coffee Beans by NIR Spectroscopy

Trigonelline and chlorogenic acid (CGA) are important quality indicators of coffee. Commonly, trigonelline and CGA concentration are determined using chemical method. This method is time consuming and destructive so it is not suitable for coffee industries which need a fast measurement. The objective of this study was to assess NIR spectroscopy for predicting trigonelline and CGA concentration in intact coffee beans. Coffee beans samples of 96 g (n=100) were placed in a petri dish. The reflectance of samples was measured by FT-NIR spectrometer in the wavelengths of 1000-2500 nm. Subsequently, the trigonelline and CGA content of samples were determined using Liquid Chromatography Mass Spectrometry (LCMS). Spectra data processing such as first and second derivative, multiple scatter correction (MSC), Standard Normal Variate (SNV) and the combination of them were carried out to reduce scattering, to eliminate overlapped absorption bands, and to optimize the best data input in calibration process. After that, these spectra (n=67) were calibrated to chemical data using Partial Least Square (PLS) to find the best calibration models. Then the calibration models were applied to predict trigonelline and chlorogenic acid (CGA) in another set of samples (n=33).  The results showed that NIR spectra data processing of second derivative combined with 4 factors of PLS was the best model for predicting CGA concentration of coffee (r=0.94, CV=2,75%, RPD=2.27). For trigonelline, however, the best model was combination of second derivative and MSC of spectra data processing and 4 factors of PLS (r=0.98, CV=1.63%, RPD=2.98). These results indicated that NIR spectroscopy can be used as a fast and nondestructive method for determining trigonelline and CGA in intact coffee beans accurately. Keywords:   chlorogenic acid, intact coffee bean, NIRS, PLS, trigonellin

Mempelajari hubungan kematangan dan berat jenis durian (Durio zibhetinus, Murr) (Study of relationship between ripeness and specific gravity of durian)

The study was conducted to determine the ripeness of durian (Durio zibhetinus) by specific gravity. Total sampel were 32 duriarts, consited of 16 unripe durians and 16 ripe durians. Durians was colected from Bogor. Specific gravity of durians was measured by water displacement method and then the durians were opened to check the ripeness. Firmness and total soluble solid were determined to reveal the ripeness of flesh. The specific gravity of ripe durian was (0.824± 0.03) g/cm3 whereas for unripe durian was (0.949 ± 0.03) g/cm3. The firmness of ripe durian was (5.99 ± 4.04) N and unripe one was (43.48 ±5.39) N. The total soluble solid of ripe durian was (43.48 ±5.39) % brix and unripe one was (6.91 ±1.30) % brix. The relationship of specific gravity (BJ) with the flesh of durian firmness and total soluble solid were fairly high with the correlation coefficients of 0.86 and 0.91 respectively. Key Word : study , relationship, ripeness, specific gravity, durian, flesh

ANALISIS PENYELENGGARAAN & LAYANAN MATAKULIAH PRAKTEK UNTUK DAERAH 3T

This qualitative descriptive study aimed to analyze the implementation of Professional Capability Strengthening (PKP) courses for undergraduate student teacher of Universitas Terbuka, living in the outermost, frontier, and disadvantaged (3T) areas in Indonesia. A sample of 65 students was selected using a purposive sampling technique from four regions, namely: Lampung, Serang, Bogor, and Mataram. A total of 8 tutors and 4 program coordinators were interviewed to triangulate the data. The results indicates that in general students are successful to complete PKP courses because they were class teachers. In addition, the support of tutors, peers, school principals, and heads of regional technical implementation units (UPTD) are important factors in facilitating the completion of student teachers’ course assignments.  During the learning process students reported some diffculties, such as limited reference books, and lack of skills in making reports and operating computers, which needs to be addressed by the academic administration. Penelitian ini dimaksudkan  untuk menganisis penyelenggaraan dan layanan matakuliah praktek Pemantapan Kemampuan Profesional (PKP) untuk mahasiswa yang berada di daerah terluar, terdepan, tertinggal (3T). Penelitian ini merupakan  penelitian deskriptif kualitatif. Populasi penelitian ini adalah mahasiswa program S1 PGSD UT di wilayah 3T di wilayah UPBJJ-UT Lampung, Serang, Bogor, dan Mataram. Sampel diambil dengan menggunakan teknik purposif sampling sebanyak  65 orang di empat UPBJJ-UT tersebut. Sebagai data pembanding 8 orang tutor dan 4 orang koordinator program diwawancarai secara mendalam. Hasil kajian menunjukkan bahwa pada umumnya mahasiswa tidak mengalami kesulitan untuk mengikuti matakuliah PKP karena mereka adalah guru kelas. Di samping itu, dukungan tutor, teman sejawat, kepala sekolah, kepala unit pelaksana teknis daerah (UPTD) sangat membantu mahasiswa untuk menyelesaikan tugas-tugas perkuliahannya. Namun demikian, ada beberapa kendala yang dialami mahasiswa, antara lain terbatasnya buku rujukan yang dimiliki dan kurang terampil dalam membuat laporan dan mengoperasikan komputer. Kendala ini perlu mendapat perhatian dan pemecahan oleh pengelola akademik

PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE STAD SETTING INKLUSI TERHADAP MOTIVASI DAN HASIL BELAJAR MATEMATIKA DI SDN BETET I KECAMATAN PESANTREN

Penelitian ini bertujuan untuk mengetahui (1) pengaruh model pembelajaran kooperatif setting inklusi terhadap motivasi belajar dan hasil belajar matematika anak berkebutuhan khusus (ABK) pengaruh motivasi belajar terhadap hasil belajar matematika anak berkebutuhan khusus. Penelitian ini merupakan jenis penelitian quasi eksperimen (non-equivalent control-group design) Populasi dalam penelitian ini adalah siswa SDN Betet 1 Pesantren Kota Kediri yang berjumlah 240 orang pada tahun ajaran 2016/2017. Sampel penelitian ini dipilih melalui teknik random sampling. Analisis data diawali dengan pengujian persyaratan analisis yaitu uji normalitas dan homogenitas, dilanjutkan dengan uji hipotesis. Hasil analisis data statistik menunjukkan rata-rata pretest hasil belajar matematika anak kelas kontrol sebesar 77,41 dengan standar deviasi 10,318 sedangkan rata-rata postes sebesar 80,69 dengan standar deviasi 7,52. –Rerata pre-test adalah 77,68 dengan standar deviasi 9,806. Sedangkan hasil hipotesis motivasi belajar terhadap hasil belajar matematika diperoleh hasil signifikansi sebesar 0,000 dengan koefisien regresi sebesar 1,203 dan nilai R square sebesar 0,484. Hasil uji hipotesis motivasi belajar siswa terhadap hasil belajar matematika diperoleh nilai R (korelasi) sebesar 0,696. Sedangkan nilai R Square sebesar 0,484 nilai ini setara dengan 48,4% artinya minat belajar matematika siswa berpengaruh sebesar 48,4%

ANALISIS RESPON MAHASISWA TERHADAP PENGGUNAAN E-MODUL PRAKTIKUM IPA DI SD PADA PEMBELAJARAN JARAK JAUH

Bentuk penelitian yang diterapkan dalam kajian ini adalah penelitian kuantitatif. Adapun metode penelitian yang digunakan adalah survei. Instrumen penelitian menggunakan angket respon mahasiswa. Responden yang mengikuti pengisian angket adalah 65 mahasiswa. Terdapat tiga aspek yang dinilai oleh siswa, yakni: aspek tampilan, aspek penyajian materi, dan aspek manfaat dengan total pernyataan adalah 16 item pernyataan. Setelah data dikumpulkan dan diolah, diperoleh hasil bahwa respon mahasiswa terhadap E-modul Praktikum IPA adalah sangat positif, baik dari aspek tampilan, penyajian materi, dan manfaat. Beberapa faktor yang membuat siswa memberikan respon sangat positif memberikan hasil presentase 81,3 % dengan kriteria sangat kuat. Respon mahasiswa terhadap penggunaan E-Modul Praktikum IPA di SD digolongkan menjadi tiga indikator meliputi: kesesuaian E-Modul dengan praktikum, penggunan software yang sesuai untuk E-modul, dan mendorong kemandirian mahasiswa. Implikasi respon mahasiswa ini memberikan potensi penggunaan E-modul Praktikum IPA dalam pembelajaran jarak jauh di Universitas Terbuka

Analysis of Science Probelm Solving Abilty Reviewed from Student Curiosity and their Learning with E-Module Assisted PjBL Model Respiratory Matter

The purpose of this study was to improve students' curiosity and problem-solving skills in science in grade V on respiratory material through a project-based learning model based on e-modules. Data collection techniques used unstructured interviews, questionnaires, tests, and documentation. Data analysis techniques were analyzed using quantitative analysis, namely one-variable t-test, difference test, N-Gain test, and regression test, and then using qualitative analysis. The results of the study: (1) Students' science problem-solving skills are more than the KKM value of 75 with a t-count value of 2.741 (> 1.706) and a significance value of 0.015 (<0.05); (2) There is an increase in science problem-solving skills of 44.27% after learning with the PjBL/project Based Learning model assisted by e-modules; (3) There is an influence of curiosity on science students' problem-solving skills of 84.7% so that it can be concluded that the greater the student's curiosity, the higher the problem-solving skills

The Effect of Science Kit and Supervision Models on The Implementation and Implications on The Evaluation of Science Practicum Distance Learning

The implementation of science practicum is one of the challenges in the open distance education system. The purpose of this research is to examine the effect of the Kit IPA variable and the pattern of guidance on the implementation and evaluation of Science Practicum activities in Distance Learning. The type of research in this study is an explanatory research with a quantitative approach involving a number of 306 students who have taken the Science Practicum course in the Elementary School Teacher Education program. Respondents' responses were analyzed using a Likert scale and data analysis using the Structural Equation Model (SEM). The results of the data have met the Model Suitability Test (Goodness of Fit Test) which includes: Science Kit and Guidance Patterns have a significant effect on Practicum Implementation. Guidance pattern has a significant effect on practicum evaluation, but Kit IPA and practicum implementation have no significant effect on practicum evaluation. The implication of this research is that it provides the potential for improvement in the implementation of science practicum in distance education due to the needs of the educational community