bluuebunny/crossref_metadata_2025 huggingface dataset:
Efektivitas Bakteriosin Bakteri Asam Laktat Lokal Terhadap Masa simpan Dan Mutu Ikan Patin (Pangasius sp)
Authors: Fibriarti Bernadeta Leni , Septiani Dea , Sari Nuria Puspita
Published: January 2021

Penggunaan pengawet alami untuk mempertahankan mutu dan memperpanjang masa simpan ikan merupakan cara yang aman dan tidak berdampak buruk bagi kesehatan. Beberapa bakteri Asam Laktat (BAL) diketahui mampu menghasilkan bakteriosin yang berpotensi digunakan sebagai biopreservatif bahan pangan. Tujuan dari penelitian ini adalah untuk mengetahui kemampuan bakteriosin BAL sebagai biopreservatif untuk mempertahankan mutu dan masa simpan ikan patin (pangasius sp) yang pengaplikasiannya dikombinasikan dengan Natrium klorida (NaCl) and Natrium Asetat (CH3COONa). Metode yang digunakan adalah metode eksperimen dengan tiga perlakuan yaitu kontrol , penambahan BAL, serta kombinasi BAL dengan 3% NaCl dan 3% Na As).Diamati pH dan dihitung jumlah bakteri dengan metode TPC (Total Plate Count).Hasil penelitian menunjukkan perlakuan kombinasi BAL , NaCl dan BAL dengan 3% NaCl dan 3% Na As memiliki efektivitas paling tinggi dalam mempertahankan mutu dan masa simpan ikan patin, mencapai 7 hari lebih lama 3 hari dibandingkan kontrol sedangkan perlakuan kombinasi dengan isolat BAL  5 hariKey words: bakteriosin, bakteri asam laktat, masa simpan ikan, ikan patin (Pangasius sp)
ANALISIS MINAT BACA MAHASISWA PROGRAM STUDI PENDIDIKAN BIOLOGI, FKIP UNWIRA
Authors: Inya Buku Maria Novita , Sepe Florentina Y.
Published: January 2021

Penelitian ini bertujuan untuk mengetahui kondisi minat baca mahasiswa Program Studi Pendidikan Biologi Fakultas Keguruan dan Ilmu Pendidikan Universitas Katolik Widya Mandira. Penelitian ini merupakan penelitian deskriptif. Pengumpulan data dalam penelitian ini menggunakan angket. Hasil penelitian ini menunjukkan bahwa dari angket yang diberikan kepada 110 mahasiswa, terdapat 1 mahasiswa yang memiliki minat baca sangat rendah (0,91%), 57 mahasiswa memiliki minat baca rendah (51,82%), 52 mahasiswa memiliki minat baca sedang (47,27%) dan tidak ada mahasiswa yang memiliki minat baca tinggi.  Kata Kunci : Minat baca, mahasiswa
PENGARUH PEMBERIAN HERBAL JAHE (Zingiber officinale) DENGAN AUTOMATIC FEEDER TERHADAP ORGAN HATI PADA ITIK (Anas
Authors: Sulistyoningsih Mei , Nurwahyunani Atip , Susanti Nia Dian
Published: January 2021

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian jahe gajah dan jahe emprit dengan cara pemberian pakan melalui Automatic feeder dan manual terhadap bobot organ  hati pada itik. Itik yang digunakan yaitu 12 ekor DOD (Day Old Duck) pejantan, pada penelitian ini menggunakan Rancangan  Acak Lengkap (RAL) pola faktor 2 x 2 dengan penambahan herbal jahe sebanyak 2  perlakuan  jahe yang digunakan yaitu jahe gajah dan jahe emprit, sedangkan pada faktor B cara pemberian pakan dengan dua perlakuan yaitu melalui Automatic feeder dan manual. Penelitian ini menggunakan 4 kali perlakuan dengan 3 kali ulangan sehingga pengambilan sampel itik sebanyak 12 ekor. Data hasil penelitian ini menggunakan uji analisis sidik ragam untuk mengetahui perbedaan hasil perlakuan. Hasil penelitian menujukkan bahwa rataan persentase bobot organ hati 48 - 60,6%. Disimpulkan bahwa pemberian herbal jahe gajah dan jahe emprit dengan cara pemberian pakan melalui Automatic feeder dan manual tidak berpengaruh nyata (P>0,05) terhadap bobot organ  hati itik.Kata kunci: itik, jahe, automatic feeder, organ hati
TINGKAT KEPUASAN DAN HASIL BELAJAR BIOLOGI DALAM PENERAPAN MEDIA INTERAKTIF QUIPPER SCHOOL
Authors: Handayanti Terrina Chairulita , Prasetyo Andreas Priyono Budi , Widianingrum Priyantini
Published: January 2021

Quipper School merupakan aplikasi online yang berfokus pada guru dan siswa dengan memanfaatkan internet sebagai media pembelajaran. Sekalipun Quipper School mulai terkenal di SMA Negeri 1 Jepara, pada kenyataannya masih sedikit informasi tentang dampak penerapan media terhadap hasil belajar. Tujuan penelitian untuk mengidentifikasi pengaruh penerapan media interaktif Quipper School pada tingkat kepuasan dan hasil belajar materi ekosistem di SMA Negeri 1 Jepara. Desain penelitian adalah Pre-Experiment dengan pola One-Group Pretest-Posttest Design . Populasi adalah seluruh kelas X-IPA berjumlah 214 siswa di SMA Negeri 1 Jepara. Teknik penelitian menggunakan purposive sampling diperoleh kelas X IPA 4, X IPA 5 dan X IPA 6. Waktu penelitian dimulai pada semester genap yakni tahun ajaran 2018/2019. Keterlaksanaan pembelajaran diukur dengan lembar observasi dan angket tingkat kepuasan siswa. Skor hasil belajar diperoleh dari nilai pretest dan posttest. Data dianalisis secara deskriptif kuantitatif. Hasil penelitian menunjukkan terdapat pengaruh signifikan penerapan media interaktif Quipper School pada materi ekosistem (0,64%). Sekolah dapat menggunakan media interaktif secara intensif untuk meningkatkan hasil belajar biologi. Kata kunci : Hasil belajar, Quipper School, tingkat kepuasan.
BIOINFORMATIK DAN ANALISIS GENETIK MIKROPROPAGASI Cibotium barometz
Authors: Anugrah Devi , Susilo Susilo , Faruq Hilman
Published: January 2021

Kultur in vitro sangat penting untuk pengembangan kultivar Simpei (Cibotium barometz) yang jumlahnya semakin langka. Penggunaan nitrogen dapat berpengaruh terhadap keberlanjutan sifat pemuliaan. Penelitian ini bertujuan untuk lebih menginvestifigasis pengaruh pemberian variasi konsentrasi nitrogen (KNO3) terhadap keragaman genetic plantet Cibotium barometz yang dihasilkan dari kultur in vitro. Tunas tunas dikumpulkan dan dikultur pada medium Murashige dan Skoog (MS) dengan konsentrasi nitrogen (KNO3) yang berbeda untuk pembentukan kultur in vitro. Dalam penelitian ini, analisis RAPD diterapkan untuk mengidentifikasi 4 planlet Cibotium barometz. Lima primer RAPD disusun untuk analisis ini. Hasil penelitian kami menunjukkan bahwa Polimorfisme pola pita DNA yang dihasilkan dari 5 primer RAPD menunjukkan keberagaman yang sangat tinggi hingga mencapai 100%. Hasil analisis klustering pola pita RAPD menggunakan metode UPGMA pada koefisien kemiripan 0.68 dan analisis komponen utama mampu dibedakan dengan tegas menjadi 3 kelompok. Kata Kunci :  ; Cibotium barometz, Keragaman Genetik, Micropropagation, Nitrogen,  PCR-RAPD
PENINGKATAN HASIL BELAJAR KOGNITIF MELALUI PEMBELAJARAN TPSW BERBASIS HYBRID-LEARNING MATERI SISTEM SIRKULASI
Authors: Puspitorini Dyah Ayu , Indriyanti Dyah Rini , Pribadi Tyas Agung , Hardiyanti Lutfia Nur
Published: January 2021

Keterbatasan waktu di akhir semester menyebabkan penyampaian materi sistem sirkulasi kurang maksimal, sehingga berpengaruh terhadap hasil belajar siswa. Penelitian ini bertujuan untuk menganalisis pengaruh penerapan TPSW (Think-Pair-Share-Write) berbasis Hybrid Learning terhadap hasil belajar kognitif. Rancangan penelitian berupa quasi eksperimen dengan desain nonequivalent pretest-posttest control group. Hasil belajar kognitif diukur dengan menggunakan tes pilihan ganda melalui pretest dan posttest. Data hasil belajar dianalisis secara kuantitatif. Nilai rata-rata posttest kelas kontrol sebesar 71,61 dan kelas eksperimen sebesar 81,25. Hasil analisis uji t posttest antara kelas eksperimen dan kelas kontrol memiliki perbedaan signifikan pada kedua kelas. Hasil analisis uji t N-gain antara kelas kontrol dan eksperimen menunjukkan adanya perbedaan signifikan nilai N-gain pada kedua kelas (p<0,05). Terdapat hubungan kuat antara hasil belajar kognitif dan keterampilan metakognitif (r=0,83). Model pembelajaran ini dapat dijadikan alternatif keterbatasan waktu tatap muka di kelas dan untuk meningkatkan hasil belajar kognitif.  Key words: think-pair-share-write, hybrid learning, hasil belajar kognitif
PENGARUH PUPUK ORGANIK CAIR LIMBAH BAKPIA DAN TAHU TERHADAP PERTUMBUHAN BAYAM HIJAU (Amaranthus viridis L.)
Authors: Lessy Nina Sakina , Pratiwi Ambar
Published: January 2021

Bayam hijau adalah jenis sayuran yang digemari oleh semua lapisan masyarakat namun peningkatan permintaan bayam hijau di Indonesia belum diimbangi dengan ketersediaan bayam hijau yang cukup dikarenakan semakin berkurangnya lahan subur untuk pertanian bayam hijau. Hal ini disebabkan adanya praktik penggunaan pupuk anorganik oleh para petani secara berlebihan atau terus menerus sehingga berdampak buruk bagi tanaman, tanah, maupun lingkungan. Salah satu alternatif untuk membenahi tanah, lingkungan, maupun tanaman bayam hijau ini ialah dengan penggunaan pupuk organik yang berasal dari limbah bakpia dan tahu karena masih mengandung sumber nutrien bagi tanaman. Tujuan penelitian ini adalah menentukan pengaruh POC limbah bakpia dan tahu terhadap pertumbuhan bayam hijau serta menentukan konsentrasi optimum POC limbah bakpia dan tahu dalam mempengaruhi pertumbuhan bayam hijau berupa tinggi batang, panjang daun, lebar daun, berat basah tanaman, berat kering tanaman, dan kadar klorofil. Variabel bebas dalam penelitian ini adalah konsentrasi POC limbah bakpia dan tahu dengan 5 ulangan dan 5 taraf perlakuan (K = 0 ml/L, P1 = 55 ml/L, P2 = 60 ml/L, P3 = 65 ml/L, dan P4 = 70 ml/L) sehingga terdapat 25 unit percobaan. Berdasarkan penelitian yang dilakukan, pemberian POC limbah bakpia dan tahu berpengaruh secara nyata terhadap pertumbuhan tanaman bayam hijau berupa tinggi batang, berat basah tanaman, dan berat kering tanaman serta konsentrasi POC limbah bakpia dan tahu yang berpengaruh paling baik terhadap pertumbuhan tanaman bayam hijau adalah 55  ml/L. Kata kunci: bayam hijau, pupuk organik cair, limbah bakpia dan tahu
PENGARUH PENAMBAHAN KAPUR (CaCO3) PADA MEDIA PEMELIHARAAN TERHADAP PERTUMBUHAN UDANG GALAH Macrobrachium rosenbergii de Man, 1879
Authors: Roshaliza Encik Jumarni , Suwartiningsih Nurul
Published: January 2021

Udang galah (Macrobrachium rosenbergii) de Man adalah salah satu spesies udang air tawar asli Indonesia yang sudah dikembangkan. Salah satu kendala dalam budidaya udang galah adalah pertumbuhan yang relatif lambat. Penelitian ini dilakukan untuk mengkaji pengaruh penambahan kapur (CaCO3) dengan berbagai konsentrasi yaitu 0 mg/L atau tanpa penambahan kapur, 15 mg/L, 30 mg/L, dan 45 mg/L terhadap pertumbuhan udang galah. Penelitian dilakukan dengan metode eksperimen (percobaan) menggunakan Rancangan Acak Lengkap (RAL) dengan 6 kali ulangan pada setiap perlakuan, dengan masing-masing ulangan terdapat 5 sampel. Parameter pertumbuhan yang diamati berupa bobot, panjang total, panjang abdomen, dan frekuesi moulting udang galah. Hasil penelitian menunjukkan bahwa penambahan kapur (CaCO3) berpengaruh pada pertambahan bobot, panjang total, panjang abdomen, dan frekuensi moulting udang galah. Pertambahan bobot, panjang total, panjang abdomen, dan frekuesi moulting yang paling optimal dengan penambahan konsentrasi kapur 45 mg/L.  Kata kunci: kalsium karbonat (CaCO3), pertumbuhan, udang galah.
DAYA KECAMBAH KABESAK (Acacia leucophloea) DAN ASAM JAWA (Tamarindus indica) MENGGUNAKAN VARIASI BAHAN DAN WAKTU PERENDAMAN
Authors: Hendrik Arnold Christian , Meha Agus Maramba
Published: January 2021

Pada pembudidayaan jenis tanaman kehutanan lokal perlu pengetahuan mengenai teknik perkecambahan yang tepat, untuk memperoleh semai secara cepat dalam jumlah banyak. Tanaman Kabesak (Acacia leucophloea) dan asam jawa (Tamarindus indica) merupakan tanaman yang memiliki manfaat penting secara ekonomis dan ekologis karena itu pemahaman teknik perkecambahan yang tepat penting diketahui. Penelitian ini mengkaji pengaruh bahan perendaman dan waktu perendaman terhadap daya kecambah kabesak dan asam jawa. Rancangan percobaan yang digunakan dalam penelitian ini adalah rancangan acak lengkap (RAL) dengan 2 perlakuan (faktorial) dan 3 ulangan. Faktor perlakukan pertama adalah bahan perendaman yaitu monosodium glutamat, urine sapi dan air panas. Faktor kedua adalah waktu perendaman yaitu 6 jam, 12 jam dan 24 jam. Perlakuan diujikan masing-masing ke benih kabesak dan asam jawa. Parameter pengamatan dalam penelitian ini adalah daya kecambah benih kabesak dan asam jawa. Hasil uji daya kecambah benih kabesak menunjukkan perendaman dengan air panas menghasilkan daya kecambah tertinggi dibanding perlakuan perendaman dengan bahan lainnya terhadap benih kabesak. Interaksi terbaik untuk bahan perendaman dan lama perendaman terhadap daya kecambah kabesak yaitu perlakuan perendaman dengan air panas selama 12 jam. Untuk uji daya kecambah Asam jawa diketahui bahwa bahan perendaman tidak mempengaruhi secara signifikan terhadap daya kecambah benih tersebut. Daya kecambah Asam jawa dipengaruhi oleh lama perendaman, dengan lama perendaman terbaik selama 6 jam. Kata kunci:  asam jawa, kabesak, monosodium Glutamat, semai, urin
EFEKTIVITAS EDMODO DALAM PEMBELAJARAN PRAKTIKUM JARINGAN TUMBUHAN TERHADAP HASIL BELAJAR SISWA SMA NEGERI 4 MAGELANG
Authors: Setyana Erna , Pukan Krispinus Kedati , Rudyatmi Ely
Published: January 2021

Tujuan penelitian ini adalah untuk menganalisis efektivitas penggunaan media Edmodo dalam pembelajaran materi struktur dan fungsi jaringan tumbuhan terhadap hasil belajar siswa. Penelitian ini adalah penelitian eksperimen dengan desain nonequivalent pretest-posttest control group. Populasi penelitian adalah seluruh siswa kelas XI MIPA SMA Negeri 4 Magelang. Sampel penelitian adalah kelas XI MIPA 1 sebagai kelompok eksperimen dan XI MIPA 2 sebagai kelompok kontrol yang ditentukan dengan teknik cluster random sampling. Data hasil belajar kognitif dianalisis ketuntasan klasikal dan diuji t. Hasil belajar afektif, psikomotor dan tanggapan siswa dianalisis secara deskriptif kuantitatif. Hasil penelitian menunjukkan bahwa terdapat perbedaan yang signifikan pada hasil belajar siswa antara kelompok eksperimen dan kontrol. Hasil tersebut diperkuat dengan pencapaian ketuntasan klasikal kelompok eksperimen sebesar 87,50% sedangkan kelompok kontrol hanya 21,88%. Ketercapaian hasil belajar afektif dan psikomotor kelompok eksperimen lebih tinggi dibandingkan kelompok kontrol. Pada kelompok eksperimen ketercapaian hasil belajar afektif dan psikomotor telah mencapai >80% yaitu 100% siswa sikapnya baik-sangat baik dan 93,75% siswa terampil-sangat terampil. Tanggapan siswa terhadap Edmodo sangat baik. Berdasarkan hasil tersebut dapat disimpulkan bahwa media Edmodo efektif digunakan dalam pembelajaran praktikum struktur jaringan tumbuhan di SMA Negeri 4 Magelang. Kata kunci : edmodo, hasil belajar, praktikum, struktur dan fungsi jaringan tumbuhan.
METODE PEMBELAJARAN STUDENT-CREATED CASE STUDIES UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS SISWA
Authors: Wafi Moh. Najih , Wuryadi Wuryadi , Haryanti Eny Hartadiyati Wasikin
Published: January 2021

Data hasil survey pra-penelitian menunjukkan keterampilan proses sains siswa masih dalam kategori cukup dan rendah. Rendahnya keterampilan proses sains siswa akan berpengaruh pada penilaian ketiga ranah standar kompetensi lulusan yang meliputi kemampuan kognitif, afektif, dan psikomotor. Metode pembelajaran student created case studies digunakan sebagai alternatif untuk meningkatkan keterampilan proses sains siswa. Penelitian ini bertujuan untuk menganalisis keefektifan metode pembelajaran student created case studies untuk meningkatkan keterampilan proses sains siswa. Penelitian ini merupakan penelitian eksperimen dengan desain pre-test and post-test control group design, dengan populasi penelitian siswa kelas  X IPA SMAN 1 Kalasan kemudian dilakukan sampling dengan metode simple random sampling. Teknik analisis data menggunakan uji independent t-test dan uji N-gain. Hasil penelitian menunjukkan penggunaan metode pembelajaran student created case studies efektif untuk meningkatkan keterampilan proses sains siswa pada materi kingdom plantae. Penggunaan metode pembelajaran student created case studies dapat membiasakan siswa untuk menerapkan konsep keterampilan proses sains. Kata kunci: Metode Pembelajaran, Science process skill, Student created case studie..
MIKOREMEDIASI LAHAN BEKAS TAMBANG TIMAH TERCEMAR LOGAM PB DENGAN FUNGI PELARUT KALIUM SEBAGAI BIOFERTILIZER POTENSIAL
Authors: Azizah Nur , Sari Eka , Hidayati Nur Annis , Suyatno Suyatno
Published: January 2021

Aktivitas penambangan menyebabkan peningkatan cemaran logam Pb yang dapat berdampak negatif pada tumbuhan dan hewan. Aktivitas tersebut juga dapat menyebabkan penurunan produktivitas tanah. Mikoremediasi merupakan teknik bioremediasi menggunakan fungi. Selain sebagai agen mikoremediasi, fungi juga dapat berperan sebagai agen biofertilizer yang dapat meningkatkan nutrisi tanah termasuk N, P, dan K. Tujuan penelitian ini adalah mengisolasi dan menguji potensi fungi pelarut kalium sebagai agen mikoremediasi yang berpotensi sebagai biofertilizer. Metode yang penelitian meliputi isolasi, uji resistensi logam Pb, uji patogenitas fungi dan hemolisis. Berdasarkan hasil penelitian didapat tiga isolat fungi pelarut kalium dari golongan Gliocladium yang dapat berpotensi sebagai agen mikoremediasi Pb hingga 100 ppm. Gliocladium juga berpotensi sebagai agen biofertilizer yang ramah lingkungan dan tidak patogen terhadap tumbuhan dan hewan.Kata kunci: Biofertilizer, Mikoremediasi, Fungi Pelarut Kalium
ANALISIS SCIENCE MOTIVATION KONSEP KLASIFIKASI MAKHLUK HIDUP PADA SISWA SMP N 2 TAMAN
Authors: Ratnawati Ratnawati , Roshayanti Fenny , Siswanto Joko
Published: January 2021

Penelitian ini bertujuan menganalisis Science Motivation siswa pada konsep Klasifikasi Makhluk Hidup, Penelitian dilakukan pada siswa kelas VII SMPN 2 Taman tahun pelajaran 2019/2020. Sampel diambil dari anak kelas VII A dan VII B sejumlah 32 anak laki-laki dan perempuan. Metode pengambilan data yang dilakukan berupa penggunaan angket Science Motivation dan lembar hasil wawancara peneliti. Berdasarkan analisis terhadap hasil angket science Motivation siswa menunjukkan bahwa Science motivation atau motivasi sains siswa SMPN 2 Taman adalah sebesar 61%. Sedangkan ditinjau dari masing-masing indikatornya sebagai berikut : indikator motivasi intrinsik dan relevansi pribadi adalah 60,5% (kriteria Sedang), indikator penilaian kemasan 61,25% (kriteria sedang), indikator penentuan karir sendiri 65,15% (kriteria sedang), indikator motivasi karir 67,03% (kriteria sedang) dan indikator motivasi kelas 53,9% (kriteria sedang). Data tersebut didukung dengan hasil wawancara peneliti terhadap siswa sampel yang memiliki hasil rendah dan hasil  tinggi.   Kata kunci: Science Motivation, klasifikasi Makhluk Hidup.
PENGARUH EKSTRAK TOMAT TERHADAP PERTUMBUHAN EMBRIO ANGGREK Phaius tankervilleae KHAS GUNUNG GALUNGGUNG KABUPATEN TASIKMALAYA
Authors: Agustin Risty , Suharsono Suharsono , Putra Rinaldi Rizal
Published: January 2021

Anggrek menjadi salah satu tanaman berbunga yang paling banyak diminati oleh sebagian besar kalangan, sehingga menjadikannya banyak diincar baik di habitat alaminya maupun yang telah dibudidayakan. Salah satu anggrek yang banyak diminati tersebut adalah jenis Phaius tankervilleae, yang merupakan anggrek tanah terbesar. Anggrek ini cukup jarang dibudidayakan, sehingga dikhawatirkan keberadaannya di alam menjadi teracam. Tujuan penelitian ini adalah untuk mengetahui pengaruh ekstrak tomat terhadap pertumbuhan embrio anggrek Phaius tankervilleae khas Gunung Galunggung Kabupaten Tasikmalaya. Penelitian ini dilaksanakan pada bulan April hingga bulan Juli di Laboratorium Kultur Jaringan Jurusan Pendidikan Biologi Fakultas Keguruan dan Ilmu Pendidikan Universitas Siliwangi. Metode yang digunakan adalah metode true experimental dengan populasi seluruh biji/embrio anggrek yang ditabur dari satu buah ke dalam cawan petri berisi media VW dengan tambahan 5 variasi konsentrasi ekstrak tomat (PA: 50 g/L, PB: 100 g/L, PC: 150 g/L, PD: 200 g/L, dan PE: 250 g/L) dan kontrol (P0) atau tanpa penambahan ekstrak tomat. Perlakuan disusun dalam Rancangan Acak Lengkap (RAL) dengan 4 kali ulangan. Sampel diambil dengan menggunakan teknik simple random sampling sebanyak 20 embrio pada setiap cawan petri. Untuk mengukur pertumbuhan embrio anggrek digunakan parameter pertumbuhan berupa perubahan ukuran dan warna embrio anggrek yang disimbolkan dengan 6 fase pertumbuhan. Teknik analisis data yang digunakan adalah uji one way ANOVA dengan α 0,05 dan uji lanjutan LSD. Hasil penelitian menunjukan bahwa penambahan ekstrak tomat memberikan pengaruh yang signifikan terhadap pertumbuhan embrio anggrek Phaius tankervilleae khas Gunung Galunggung Kabupaten Tasikmalaya, dengan perlakuan terbaik ditunjukan oleh perlakuan penambahan ekstrak tomat 100 gr/l (perlakuan PB). Kata kunci : ekstrak tomat, pertumbuhan, embrio, Phaius tankervillea
Model Pembelajaran Kooperatif Tipe Student Team Achievement Division Terhadap Peningkatan Keterampilan Proses Sains dan Hasil Belajar Fisika Siswa
Authors: Mindawati Teni , Nana Nana
Published: January 2021

Based on observations in MA Negeri 6 Tasikmalaya, the implementation process of learning physics is still not achieve the maximum results, especially in class X. The main purpose of this study is to describe the increase of KPS and students’ learning achievement in learning physics using a cooperative learning model type Student Team Achievement Division (STAD). This classroom action research has been conducted in three cycles with 30 students of X5 Class of MA Negeri 6 Tasikmalaya. Every cycle consists of planning, action and observation, and reflection. The data were collected using observation sheet for KPS and essay test for learning achievement. Based on the results indicate that the cooperative learning model type STAD effectively could increase KPS and students’ learning achievement in learning physics from cycle to cycle.
Keefektifan Multimedia Interaktif Berbasis Mobile dengan Pendekatan Kontekstual untuk Meningkatkan Social Skill dan Kemampuan Berfikir Kritis Pada Materi Gerak dan Gaya
Authors: Zulham Muhammad
Published: January 2021

Penelitian ini bertujuan mengetahui keefektifan multimedia pembelajaran IPA dengan pendekatan kontekstual dalam meningkatkan keterampilan sosial dan kemampuan berpikir kritis siswa SMP. Penelitian dilaksanakan di SMP Negeri 1 Sedayu, Yogyakarta. Uji coba lapangan menggunakan dua kelas yang dipilih menggunakan teknik simple random sampling. Kelas VIII B sebagai kelas eksperimen yang mendapat perlakukan berupa pembelajaran menggunakan multimedia dan kelas VIII D sebagai kelas kontrol atau kelas yang tidak mendapat perlakuan. Teknik pengumpulan data yang digunakan adalah teknik angket dan tes. Teknik angket digunakan untuk mengetahui keterampilan sosial, sedangkan tes uraian digunakan untuk mengetahui kemampuan berpikir kritis siswa. Teknik analisis data yang digunakan adalah konversi skor ke nilai, kemudian dilanjutkan dengan uji normalitas, uji homogenitas dan uji manova.Hasil penelitian menunjukkan bahwa penggunaan multimedia dengan pendekatan kontekstual dapat meningkatkan keterampilan sosial dan kemampuan berpikir kritis siswa SMP. Kondisi ini terlihat dari hasil uji beda antara kelas kontrol dan eksperimen yang menunjukkan keterampilan sosial dan kemampuan berpikir kritis kelas eksperimen lebih unggul dibandingkan kelas kontrol. Gain score keterampilan sosial kelas eksperimen diperoleh sebesar 0,50 sedangkan kelas kontrol 0,30. Gain score kemampuan berpikir kritis untuk kelas eksperimen 0,60 sedangkan kelas kontrol 0,43
Efektifitas Pengembangan Lembar Kerja Peserta Didik Berbasis Keterampilan 4C Melalui Model Research Based Learning Untuk Pembelajaran Fisika
Authors: Utama Zaka Putra , Festiyed Festiyed
Published: January 2021

Abstract. This study aims to describe the effectiveness of 4c skill-based LKPD on the Research Based Learning model for physics learning for high school students. The research method used is a research and development method by using the Plomp development model, namely Preliminary Research¸Prototype Phase and Assessment Phase . The instrument used was the LKPD effectiveness sheet seen from the 4c Skill of students. The results of the study indicate the value of an increase in analysis that LKPD through the Research Based Learning model is effective in efforts to improve the 4C skills of education participants. Keywords. LKPD, Research Based Learning, 4C SkillsKeywords. LKPD, Research Based Learning, 4C Skills
A CATEGORIA TRABALHO NO SISTEMA INTEGRADO DE TRANSPORTES DE FORTALEZA (SIT-FOR)
Authors: Porto Neto Edilson Da Silva , Santana Gabriel Augusto Coelho de
Published: January 2021

No presente artigo pretendemos discutir as relações socioespaciais constituídas no âmbito do Sistema Integrado de Transportes de Fortaleza (SIT-FOR). Para fazê-lo, lançamos mão da categoria trabalho, compreendendo em uma perspectiva marxista que é a partir das relações de trabalho que mulheres e homens mediam sua relação com os demais elementos da natureza e se constituem como seres sociais. Nesse sentido, ao desvelar os papéis que o sistema de transporte cumpre nas cidades, como de assegurar a mobilidade da classe trabalhadora em direção aos locais de trabalho, não podemos deixar de perceber que também as contradições de classe engendradas no conflito entre motoristas de ônibus, cobradores e empresários do setor fazem parte do processo de (re)produção do espaço urbano em cidades como Fortaleza.
MEDIEVAL WARM PERIOD OF THE HOLOCENE AND ITS POSSIBLE CAUSES
Authors:   Lomonosov Moscow State University, FEDOROV Valeriy , GREBENNIKOV Pavel ,   Lomonosov Moscow State University
Published: January 2021

A brief overview of reliably established global climate events in the Holocene is provided. On the basis of high-precision astronomical ephemeris with high spatial and temporal resolution, the annual and seasonal insolation of the Earth and hemispheres was calculated for the period 3000 BC-AD 2999. According to the results of calculations, the values of insolation contrast were obtained in a generalized manner (for the regions of the heat source and sink), reflecting the changes in the meridional insolation gradient that controls the meridional heat transfer in the hemispheres. The character of long-term variations of both the annual and seasonal arrival, and the annual and seasonal meridional transport of radiation heat in the hemispheres was obtained. The long-term distribution of insolation characteristics of the Earth and hemispheres (annual and seasonal insolation and insolation contrast in the hemispheres) is analyzed. The synchronicity of the extrema of the irradiation characteristics with the global climatic event in the history of the Earth (the Medieval Warm Period of the Holocene) was revealed. On the basis of the revealed synchronicity, the maximum insolation contrast in the winter half of the year in the Northern Hemisphere (the maximum of meridional heat transfer in the winter half of the year), as well as the maximum of interhemispheric heat transfer may be determined to be the reasons for the Medieval Warm Period.
PRELIMINARY STUDY ON INVERTEBRATE BIODIVERSITY OF VOLCANIC CAVES IN KRONG NO, DAK NONG PROVINCE, VIETNAM
Authors: PHAM DINH , NGUYEN MINH , PHAM THAI , LA PHUC , HOANG NGA , PHAN CAO , HAI YEN DANG , TRAN HAO
Published: January 2021

Survey on invertebrate biodiversity of volcanic caves in Krong No, Dak Nong province, Vietnam was carried in 2018 and 2019. The survey were done in 8 typical caves are Co cave (475 m long), C1 cave (402 m), C2 cave (402 m), C3 cave (716 m), C4 cave (251 m), C6 cave (180 m), C6.1 cave (293 m) and C7 cave (1066 m). The survey result recorded 41 species, 31 families of 5 classes, 13 orders of invertebrate at volcanic caves in Krong No. It is expected that 13 species will become new taxa, for example a scorpion of the Chaerilidae family, Chaerilus chubluk Lourenco, Tran & Pham, 2020 in the Co cave. The large and long caves with a complicated structure with many corners are more valuable in term of biological diversity than the small caves with a simple structure.
LEVEL VARIABILITY OF THE SEA OF OKHOTSK COASTAL AREAS AT THE BEGINING OF THE 21ST CENTURY AND ITS REPRESENTATIONIN THE GLOBAL REANALYSIS DATABASES
Authors: KHOLOPTSEV Aleksandr , PODPORIN Sergey
Published: January 2021

The paper aims to investigate basic features of modern long-term variations of the Okhotsk Sea level in its coastal areas and establish feasibility of certain retrospective analysis databases usage for determination of mean rates of the above processes. The reanalysis databases considered include Global Ocean Physics Reanalysis GLORYS12v.1 by the Copernicus Marine Environment Monitoring Service and ICDC-reanalysis supported by the Integrated Climate Data Center, which provide coverage of the sea in question. The raised problem is of significant interest for physiographers, oceanographers and involved in coastal shipping and marine safety in the Sea of Okhotsk. Long-term sea level variations are most accurately monitored by tide gauge stations, which, however, are scarce along the coast of the sea in question. Less accurate and not uniformly available through easier to use and collect data is the satellite monitoring by radar altimeters. Global retrospective analyses based on mathematical modelling are considered to be an effective instrument to assess sea levels at any given time at any point.
JAPANESE GARDEN AS ECOLOGY AND MYSTICISM SYNTHESIS
Authors:   N.V. Tsitsin Main Botanical Garden of the Russian Academy of Sciences, Golosova Elena
Published: January 2021

The article examines a number of causal relationships, historical events and traditional beliefs directly influenced on the Japanese garden structure and layout. The data on the adaptation of the Chinese theory of Feng Shui by the Japanese ethnic group are presented. Based on the survey of 27 landscape architecture objects in Kyoto, created over 1000 years from the Heian period to the end of the Meiji period, the author concludes that one of the most important Japanise garden planning concept is the mountain and water polarity on the North-South axis in gardens.
EDUCATIONAL ACTIVITY IN PUSHCHINO MUSEUM OF ECOLOGY AND LOCAL LORE
Authors:   All-Russian Institute for Scientific and Technical Information (VINITI RAS), SHUMOVSKAYA Darya
Published: January 2021

Formation of an educational weekend program popularizing the foundations of mineralogy, botany and local history of the area, developed for primary and secondary school students is considered. The program development and implementation was carrying out for the Pushchino Museum of Ecology and Local Lore in 2018-2019. Possibilities of initial acquaintance with the world of plants and minerals within the framework of the museum exposition in combination with both excursion and independent activity on the ecological path of the city and in the Green Zone are shown. A thematic selection of classical popular scientific literature has been made to develop further keen interest in the subject. The program of acquaintance with the area was tested on the groups of the Tatiana school in Moscow, students of summer camps from general education schools and students of the ecological circle “Living River” in Pushchino town.
FEATURES OF THE ENVIRONMENTAL SCHOOL «BIOSPHERE IN OUR HANDS» ONLINE CONDUCTING
Authors:   Lomonosov Moscow State University, TIMOFEEVA Elena , POPOVA Lyudmila ,   Lomonosov Moscow State University
Published: January 2021

Experience of the project «Environmental School “Biosphere in our hands”» activities online conducting for grades 8-10 of general education schools, participants in the project “Academic (scientific and technological) class in a Moscow school” has been analyzed. Online format of work with schoolchildren required more thorough preparation of classes, especially practical ones, and revealed a number of regulatory and communication problems, such as insufficient self-discipline of schoolchildren and weak feedback.
LIVE PLANTS AS AN ADDITIONAL BOTANICAL COMPONENTOF THE THEMATIC EXPOSITION IN THE EARTH SCIENCE MUSEUM AT MOSCOW STATE UNIVERSITY
Authors: Golikov Kirill , LAPTEVA Ekaterina , SOCHIVKO A.
Published: January 2021

The article discusses the use of live plants as the botanical exposition component supplement of the “Natural areas” (hall № 17 “Natural zonality and its components” and № 20 “Desert, subtropical, tropical countries, high-altitude zone”) and “Physico-georaphic regions” (hall № 24 “Continents and parts of the world”) departments in order to visualize information presented in the Earth Science Museum. Demonstration of plants originating from different regions of the world representing different life forms and being structural components of various plant communities allows to visually characterizing thematic aspects of an exposition. That in turn reveal such principles of systematic nature organization as ecobiomorphic and phytocenotic.
PHYSICAL MODELING OF STRUCTURE-FORMING DEFORMATIONS IN THE LABORATORY OF EXPERIMENTAL GEODYNAMICSAT THE EARTH SCIENCE MUSEUM AT MOSCOW STATE UNIVERSITY (TO THE 40TH ANNIVERSARY OF THE LABORATORY ESTABLISHMENT)
Authors: GROKHOLSKY ANDREY , DUBININ Yevgeny , AGRANOV Grigory , BARANOVSKY Maksim , DANILOV Yaroslav , DOMANSKAYA Polina , RASHCHUPKINA Anastasia , MAKUSHKINA Anna , MAKSIMOVA Anastasia , TOLSTOVA Anastasia , FILARETOVA Anna , SHEPTALINA Yulia , SHCHERBAKOVA Ekaterina
Published: January 2021

The creation of the laboratory of experimental geodynamics of the Earth Science Museum history is considered in the context of geodynamics establishment of as a branch of geology. The main directions of experimental research carried out in the laboratory for the period 2015-2020 and the main results of the experiments are presented. The issues of using experimental results in the educational process and in the museum exposition are highlighted.
TO BE REMEMBERED... ANNIVERSARIES OF TWO ACADEMICIANS
Authors:   Volgograd State Socio-Pedagogical University, MONIKOV Sergey
Published: January 2021

2020 marks 280 years since the birth of the outstanding Russian naturalist and explorer Ivan Ivanovich Lepyokhin (1740-1802) and 275 years since the birth of the outstanding German explorer and naturalist Samuel Gottlieb Gmelin (1745-1774). An overview of scientific contribution to the study of nature and economics of the Russian Empire in general and the southeast of European Russia in particular made by these two leaders of the Academic Expeditions of 1768-1774 is presented. The author discusses a number of inconsistencies in S.G. Gmelin’s biography found in references (encyclopedias), scientific and popular science literature of pre-revolutionary Russia and the USSR. The question of I.I. Lepyokhin and S.G. Gmelin memorialization in Volgograd and Saratov Regions and the Republic of Dagestan has been raised.
Near Ring Multiplications on a Modified Near Module Over a Near Ring
Authors: Ramakrishna A. V. , Prasanna T.V.N. , Lakshmi D.V.
Published: January 2021

We introduce the notion of a modied near module M over a near ring N and explain a method of obtaining near ring multiplications via a special type ofÂ maps from M into N called semilinear maps.
Estimating the Basic Reproductive Number of COVID-19 Cases in Ghana
Authors: Otoo Dominic , Donkoh Elvis Kobina , Kessie Justice Amenyo
Published: January 2021

A disease can be defined as an adverse change from a normally functional state of the living body usually characterized with or accompanied with some signs and symptoms which is differing in nature from physical injury. A pandemic is the worldwide spread of a new disease. COVID-19 is one of the global pandemic that emerged in Wuhan, China, in December 2019 and has since then spread over through the world. In Ghana, the first case of COVID-19 was reported in March 14, 2020 and has increased from just one case to over 29000 cases with over 150 deaths as at July 23, 2020. This study focuses on the estimation of the basic reproductive number, R0 using the Next Generation Method (NGM) approach. COVID-19 data in Ghana was collected and parameters were estimated using the Least-Squares Method. The basic reproductive number of Ghana is estimated to be 2.52 whilst the R0 ranges between 1.47 âˆ’ 2.65 for transmission rates of 0.5 âˆ’ 0.9.
On the Independent Neighborhood Polynomial of the Cartesian Product of Some Special Graphs
Authors: Abdulcarim Normalah Sharief , Dagondon Susan C. , Chacon Emmy
Published: January 2021

Two vertices x, y of a graph G are adjacent, or neighbors, if xy is an edge of G. A set S of vertices in a graph G is a neighborhood set if G =[vâˆˆShN[v]i where hN[v]i is the subgraph induced by v and all the vertices adjacent to v. If no two of the elements of S are adjacent, then S is called an independent neighborhood set. The independent neighborhood polynomial of G of order m is Ni(G, x) = Xm j=Î·i(G) ni(G, j)xj where ni(G, j) is the number of independent neighborhood set of G of size j and Î·i(G) is the minimum cardinality of an independent neighborhood set of G. This paper investigates the independent neighborhood polynomial of the Cartesian product of some special graphs.
Asymptotic Laws for Upper and Strong Record Values in the Extreme Domain of Attraction and Beyond
Authors: Lo Gane Samb , Ahsanullah Mohammad , Diallo Moumouni , Ngom Modou
Published: January 2021

Asymptotic laws of records values have usually been investigated as limits in type. In this paper, we use functional representations of the tail of cumulative distribution functions in the extreme value domain of attraction to directly establish asymptotic laws of records value, not necessarily as limits in type and their rates of convergences. Results beyond the extreme value value domain are provided. Explicit asymptotic laws concerning very usual laws and related rates of convergence are listed as well. Some of these laws are expected to be used in fitting distribution.
Radon Measure-valued Solutions for Nonlinear Strongly Degenerate Parabolic Equations with Measure Data
Authors: Nkombo Quincy Stevene , Li Fengquan
Published: January 2021

In this paper, we prove the existence of Radon measure-valued solutions for nonlinear degenerate parabolic equations with nonnegative bounded Radon measure data. Moreover, we show the uniqueness of the measure-valued solutions when the Radon measure as a forcing term is diffuse with respect to the parabolic capacity and the Radon measure as a initial value is diffuse with respect to the Newtonian capacity. We also deduce that the concentrated part of the solution with respect to the Newtonian capacity depends on time.
Markov Modeling of Battery Cell Behavior Taking into Account Pulsed Discharge Recovery
Authors: Konane Victorien Fourtoua
Published: January 2021

In this work, we modeled the behavior of a battery. After having formulated a Markovian model, we evaluated the delivered capacity as well as the gained capacity. We, likewise, evaluated the mean number of pulses and studied the asymptotic behavior and the variance of this mean number. As a last resort, we introduced an extension of the Markov model.
A Breadth-first Search Tree Construction for Multiplicative Circulant Graphs
Authors: Antalan John Rafael Macalisang , Campena Francis Joseph
Published: January 2021

In this paper, we give a recursive method in constructing a breadth-first search tree for multiplicative circulant graphs of order power of odd. We then use the proposed construction in reproving some results concerning multiplicative circulant graph's diameter, average distance and distance spectral radius. We also determine the graph's Wiener index, vertex-forwarding index, and a bound for its edge-forwarding index. Finally, we discuss some possible research works in which the proposed construction can be applied.
Ore Extension Rings Satisfy the Weak PS-Rings
Authors: Farahat Mohamed , Al-Bogamy Salha
Published: January 2021

The main result of this paper is that: If R is a weak right PS-ring, then A = R[x; Î±, Î´], the Ore extension ring, is a weak right PS-ring whenever the following conditions hold on R is an (Î±, Î´)-compatible NI-ring with nil(R) nilpotent, Î±(e) = e and Î´(e) = 0 for every idempotent e âˆˆ R.
General Results for General Transmuted-G Distributions
Authors: Shahbaz Saman Hanif , Rahman Md. Mahabubur , Shahbaz Muhammad Qaiser
Published: January 2021

In this paper we have given some general results for the general transmuted families of distributions introduced by Rahman et al. (2018a,b). These results are helpful to obtain the results for any member of the general families of distributions and their special cases. We have given some examples for illustration.
A Note on the (Weighted) Bivariate Poisson Distribution
Authors: Bidounga R. , Batsindila Nganga P. C. , NiÃ©rÃ© L. , MizÃ¨re D.
Published: January 2021

In the recent statistical literature, the univariate Poisson distribution has been generalized by many authors, among them: the univariate weighted Poisson distribution [13], the generalized univariate Poisson distribution [7], the bivariate Poisson distribution according to Holgate [11], the bivariate Poisson distribution according to Lakshminarayana, Pandit and Srinivasa Rao [15], the bivariate Poisson distribution according to Berkhout and Plug [4], the bivariate weighted Poisson distribution according to Elion et al. [8] and the generalized bivariate Poisson distribution according to Famoye [9]. In this paper, We highlight the weighted bivariate Poisson distribution and show that it is the synthesis of all the bivariate Poisson distributions which, under certain conditions, converge in distribution towards the bivariate Poisson distribution according to Berkhout and Plug [4] which can be considered like the standard distribution in N2 as is the univariate Poisson distribution in N.
Explicit Formulas for the First Form (q,r)-Dowling Numbers and (q,r)-Whitney-Lah Numbers
Authors: Corcino Roberto Bagsarsa , Ontolan Jay , Lobrigas Maria Rowena
Published: January 2021

In this paper, aÂ q-analogue ofÂ r-Whitney-Lah numbers, also known as (q,r)-Whitney-Lah number, denoted by $L_{m,r}Â [n, k]_q$Â is defined using the triangular recurrence relation. Several fundamental properties for theÂ q-analogue are established such as vertical and horizontal recurrence relations, horizontal and exponential generating functions. Moreover, an explicit formula for (q, r)-Whitney-Lah number is derived using the concept ofÂ q-difference operator, particularly, theÂ q-analogue of Newtonâ€™s Interpolation Formula (the umbral version of Taylor series). Furthermore, an explicit formula for the first form (q, r)-Dowling numbers is obtained which is expressed in terms of (q,r)-Whitney-Lah numbers and (q,r)-Whitney numbers of the second kind.
Existence of Weak Solution of Navier-Stokes-Fourier System with a New Successive Approximation Method
Authors: Bade RabÃ© , Chaker Hedia
Published: January 2021

In This paper we prove the existence of a weak solution of the complete compressible Navier-Stokes system. We follow an previous work where we added an artificial viscosity in the continuity equation and then rewrite the system in hyperbolic and symmetric form. Our study is based on the symmetric hyperbolic theory. We use for this aim a successive approximation in time to show the existence of the hyperbolic system solution and by the fixed point theorem the compacity property of some appropriate sobolev spaces and some established a priori estimates we can pass to several limits to prove our result. As state law, we use the Stiffened gas law.
On Independent Transversal Dominating Sets in Graphs
Authors: Sevilleno Daven Sapitanan , Jamil Ferdinand P.
Published: January 2021

A set S âŠ† V (G) is an independent transversal dominating set of a graph G if S is a dominating set of G and intersects every maximum independent set of G. An independent transversal dominating set which is a total dominating set is an independent transversal total dominating set. The minimum cardinality Î³it(G) (resp. Î³itt(G)) of an independent transversal dominating set (resp. independent transversal total dominating set) of G is the independent transversal domination number (resp. independent transversal total domination number) of G. In this paper, we show that for every positive integers a and b with 5 â‰¤ a â‰¤ b â‰¤ 2a âˆ’ 2, there exists a connected graph G for which Î³it(G) = a and Î³itt(G) = b. We also study these two concepts in graphs which are the join, corona or composition of graphs.
Properties of Nilpotent Evolution Algebras with no Maximal Nilindex
Authors: Alarfeen Ahmad , Qaralleh Izzat , Ahmad Azhana
Published: January 2021

As a system of abstract algebra, evolution algebras are commutative and non-associative algebras. There is no deep structure theorem for general non-associative algebras. However, there are deep structure theorem and classification theorem for evolution algebras because it has been introduced concepts of dynamical systems to evolution algebras. Recently, in [25], it has been studied some properties of nilpotent evolution algebra with maximal index (dim E2 = dim E âˆ’ 1). This paper is devoted to studying nilpotent finite-dimensional evolution algebras E with dim E2 =dim E âˆ’ 2. We describe Lie algebras related to the evolution of algebras. Moreover, this result allowed us to characterize all local and 2-local derivations of the considered evolution algebras. All automorphisms and local automorphisms of the nilpotent evolution algebras are found.
Global Hop Domination Numbers of Graphs
Authors: Salasalan Gemma , Canoy, Jr Sergio
Published: January 2021

A set S âŠ† V (G) is a hop dominating set of G if for each v âˆˆ V (G) \ S, there existsÂ w âˆˆ S such that dG(v, w) = 2. It is a global hop dominating set of G if it is a hop dominatingset of both G and the complementÂ of G. The minimum cardinality of a global hop dominatingset of G, denoted by Î³gh(G), is called the global hop domination number of G. In this paper, we study the concept of global hop domination in graphs resulting from some binary operations.Â
Bi-interior Ideal Elements in âˆ§e-semigroups
Authors: Kehayopulu Niovi
Published: January 2021

All the results on semigroups obtained using only sets, can be written in an abstract form in a more general setting. Let us consider a recent paper to justify what we say. The bi-interior ideals of semigroups introduced and studied by M. Murali Krishna Rao in Discuss. Math. Gen. Algebra Appl. in 2018, follow for more general statements about ordered semigroups. The same holds for every result of this sort on semigroups based on right (left) ideals, bi-ideals, quasi-ideals, interior ideals etc. for which we use sets. As a result, we have an abstract formulation of the results on semigroups obtained by sets that is in the same spirit with the abstract formulation of general topology (the so-called topology without points) initiated by Koutsk Ìy, NÃ¶beling and, even earlier, by Chittenden, Terasaka, Nakamura, Monteiro and Ribeiro. As a consequence, results on ordered Î“-hypersemigroups and on similar simpler structures can be obtained.