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Varantika, Novanda
Chemistry in Education
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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PENGARUH MODEL PEMBELAJARAN INKUIRI TERBIMBING TERHADAP HASIL BELAJAR ASPEK PENGETAHUAN PADA MATERI HIDROLISIS-BUFFER Varantika, Novanda; Susatyo, Eko Budi; Sumarni, Woro
Chemistry in Education Vol 7 No 2 (2018): Terbit bulan Oktober 2018
Publisher : Chemistry in Education

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Abstract This study aims to determine the magnitude of the influence of group guided inquiry on cognitive aspects of learning outcomes. The study used pretest-posttest control group design, while the sampling technique is cluster random sampling. In this research. Students at XI IPA 4 have been decided as experiment class and XI IPA 6 as control class. Data taken using objective tests with reasoning. Data obtained, analyzed by using t test and determination coefficient. Based on t-test, it is found that tcount of cognitive aspects of learning outcomes  is 2,015 is bigger than tcritic is 2,00, meaning there is significant difference between mean of cognitive aspects of learning outcomes of experiment class and control class. Based on the analysis of determination coefficient obtained that study guided inquiry influence on cognitive aspects of learning outcomes of 9,00%. Based on the result of the research, it can be concluded that the study of group investigation has an effect on cognitive aspects of learning outcomes is 9,00%. Keywords: Guided Inquiry, Cognitive Aspects, Hydrolisis-buffer material.
Analisis Dinamik Model Predator-Prey pada Penyebaran Grass Carp Fish sebagai Biokontrol Populasi Eceng Gondok di Perairan Rawapening Varantika, Novanda; Anisa, Rifki Dwi; Kharis, Muhammad; Ilmiawan, Dwi Fahmi; Carnawi, Carnawi; Anwaristiawan, Duwanda
Journal of Creativity Student Vol 1, No 1 (2018): April 2018
Publisher : Journal of Creativity Student

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Eceng gondok merupakan tanaman invasif yang perlu dikontrol populasinya. Pengontrolan populasi eceng gondok dapat dilakukan dengan biokontrolgrass carp fishdan pemanenan. Interaksi pada pengontrolan tersebut dinamakan model predator-prey. Pada penelitian ini, dibahas sistem dinamik model predator-prey dan pengaruh penyebaran biokontrolpopulasi eceng gondok di Rawapening. Model yang dikontruksi dengan fungsi logistik dan respon Holling tipe III, karena sesuai dengan tipe ikan grass carp yang cenderung mencari mangsa lain ketika eceng gondok mulai berkurang. Keseimbangan kedua populasi terjadi pada titik dan dengan beberapa syarat batas. Keempat titik keseimbangan berada dalam kkondisi stabil dengan syarat tertentu pula. Pengaruh yang muncul di lapangan memberikan hasil yang positif. Di mana keberadaan ikan grass carp mampu menghambat pertumbuhan eceng gondok, meskipun belum terlihat secara signifikan. Nilai parameter yang diperoleh kemudian simulasikan melalui program Maple. Hasil simulasi numerik menunjukkan kedua populasi akan mencapai keseimbangan lestari dalam jangka waktu sekitar 600 hari. Ketika kehadiran burung predator turut diikutsertakan, model berubah cukup drastis.
Co-Authors Anisa, Rifki Dwi Anwaristiawan, Duwanda Carnawi, Carnawi Eko Budi Susatyo Ilmiawan, Dwi Fahmi Muhammad Kharis Woro Sumarni