PENERAPAN MODEL DISCOVERY LEARNING UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA SUBTEMA MACAM - MACAM SUMBER ENERGI (Penelitian Tindakan Kelas Pada Subtema Macam - macam Sumber Energi Pada Siswa Kelas IV SDN Ciheulang 1 Kecamatan Ciparay Kabupaten Bandung )

ABSTRAK PENGGUNAAN MODEL PEMBELAJARAN STUDENT TEAM ACHIEVEMENT DIVISION UNTUK MENINGKATKAN MOTIVASI DAN HASIL BELAJAR SISWA KELAS II SD DALAM MENULIS KEGIATAN SEHARI - HARI PADA SUBTEMA HIDUP RUKUN DI RUMAH (Penelitian Tindakan Kelas pada Siswa Kelas II Semester I S DN Sukajaya Kecamatan Lembang Kabupaten Bandung Barat Tahun Pelajaran 2016/2017 ) Penelitian ini mengangkat permasalahan tentang penggunaan model pembelajaran kooperatif tipe student team achievement division untuk meningkatkan motivasi dan hasil belajar siswa kelas II SD tentang menulis kegiatan sehari - hari pada subtema “Hidup Rukun di Rumah” di SDN Sukajaya. Tujuan penelitian adalah u ntuk mengetahui tingkat keberhasilan siswa dalam pembelajaran dengan menggunakan model pembelajaran student team achievem ent division ; u ntuk meningkatkan motivasi belajar siswa ; u ntuk meningkatkan hasil belajar yang optimal. P enelitian ini dilatar belakangi oleh metode penyampaian materi yang terpusat pada guru sementara siswa cenderung pasif , upaya yang dilakukan adalah me laksanakan pembelajaran dengan menggunakan model pembelajar a n STAD untuk meningkatkan motivasi dan hasil belajar siswa. Dampak dari pengguna an model pembelajaran STAD tersebut diharapkan mampu meningkatkan motivasi dan hasil belajar siswa sehingga mampu meningkatkan prestasi belajarnya. Metode penelitia n yang digunakan adalah metode P enelitian T indakan K elas. P TK ini terdiri dari 2 siklus. Setiap tindakan yang dilaksanakan dimulai dari perencanaan, pelaksanaan, observasi, analisis ti ndakan dan refleksi. Subjek penelitian adalah siswa kelas II SDN Sukajaya. Instrumen yang dipakai dalam penelitian ini yaitu pedoman observasi, hasil tes , dan dokumentasi. Hasil penelitian ini menunjukkan bahwa motivasi dan hasil belajar siswa mengalami peningkatan. Hal ini terlihat dari perbandingan respons yang diberikan siswa pada siklus I yaitu 74,80% dan pada siklus II meningkat menjadi 89,02%. Hal ini berarti terjadi peningkatan sebanyak 14,22%. Pada hasil belajar siswa pun mengalami peningkatan. Ha l ini dapat terlihat dari hasil belajar siswa dari pra siklus dengan nilai rata - rata mencapai 65,19 ke siklus I meningkat sebesar 0,54 menjadi 65,73 dan dilanjutkan pada siklus II yang meningkat 15,61 menjadi 81,34. S impulan penelitian menun j u kk an bahwa pe nggunaan model pembelajaran STAD mempunyai konstribusi positif terhadap peningkatan motivasi dan hasil belajar siswa dalam pembelajaran menulis kegiatan sehari - hari pada subtema “Hidup Rukun di Rumah” di kelas II SDN Sukajaya . Kata kunci : Model p embelajaran , Student Team Achievement Division , motivasi b elajar, h asil b elajar

On the Hilbert scheme of curves in higher-dimensional projective space

In this paper we prove that, for any $n\ge 3$, there exist infinitely many $r\in \N$ and for each of them a smooth, connected curve $C_r$ in $\P^r$ such that $C_r$ lies on exactly $n$ irreducible components of the Hilbert scheme \hilb(\P^r). This is proven by reducing the problem to an analogous statement for the moduli of surfaces of general type.Comment: latex, 12 pages, no figure

Effect of low gamma radiation on the growth of Vanilla planifolia cultures

A study was conducted to determine the effect of low doses of gamma radiation on the regeneration and morphological of Vanilla planifolia, a tropical climbing orchid from the family Orchidaceae. The explants were treated with seven different combinations of sterilization agents before inoculating on Murashige and Skoog medium and incubated for three weeks at 25±2ºC. After incubation, the cultures were exposed to three doses of gamma radiation (10 Gy, 20 Gy and 30 Gy). After twelve weeks, the result showed that regeneration of V. planifolia was the highest at 10 Gy irradiation, where shoot height was 13.40±0.33 cm compared to the non-irradiated culture with only 6.89±0.21 cm. The leaf and root numbers as well as root length also showed the highest for 10 Gy cultures. The lowest regeneration was obtained from 30 Gy irradiated cultures. However, no morphological changes were detected in all treated cultures. Thus, it can be suggested that low doses of gamma irradiation stimulate the in vitro regeneration of V. planifolia

On Buchsbaum bundles on quadric hypersurfaces

Let $E$ be an indecomposable rank two vector bundle on the projective space \PP^n, n \ge 3, over an algebraically closed field of characteristic zero. It is well known that $E$ is arithmetically Buchsbaum if and only if $n=3$ and $E$ is a null-correlation bundle. In the present paper we establish an analogous result for rank two indecomposable arithmetically Buchsbaum vector bundles on the smooth quadric hypersurface Q_n\subset\PP^{n+1}, $n\ge 3$. We give in fact a full classification and prove that $n$ must be at most 5. As to $k$-Buchsbaum rank two vector bundles on $Q_3$, $k\ge2$, we prove two boundedness results.Comment: 22 pages, no figur

Fat points on rational normal curves

In this paper we study 0-dimensional schemes Z made of "fat points" in Pn, n at least 2, whose support lies on a rational normal curve. We conjecture that the Hilbert function of Z does not depend on the choice of the points and we show this under some numerical hypotheses. We also study the Hilbert Function of the infinitesimal neighborhoods of the rational normal curve and we find the value where it coincides with the Hilbert Polynomial

HUBUNGAN SIFAT FISIOLOGIS TANAMAN KEDELAI (Glycine max (L.) Merr.) DAN KETERGANTUNGANNYA TERHADAP MIKORIZA

The research had been conducted at Kebun Percobaan Fakultas Pertanian, Universitas Gadjah Mada, Banguntapan, Bantul, Yogyakarta since January to May 2013 to know the degree of dependence of eighteen soybean cultivars (Glycine max (L.) Merr.) that inoculated of mycorrhizal arbuscula fungi and found the relation of eighteen soybean cultivars (Glycine max (L.) Merr.) physiological characteristic. The experimental design applied the Completely Randomized Design (CRD) in factorial 18x2 with three replication. The first factor was soybean cultivars consisted of 18 levels, there were Grobogan, Burangrang, Sibayak, Kaba, Tanggamus, Anjasmoro, Argomulyo, Wilis, Panderman, Ijen, Baluran, Galunggung, Petek, Garut, Gepak Kuning, Malabar, Seulawah, and Sinabung. The second factor was inoculation mycorrhiza, consisted of 2 levels, there were without inoculation mycorrhiza and with inoculation mycorrhiza. The collected data then were analyzed by means of analysis of variance (Anova) applying level of significanced α = 5%. The result shows there are three categories the degree of mycorrhizal dependency which are highly dependent (Kaba, Wilis, and Baluran cultivar), moderately dependent (Grobogan, Anjasmoro, Argomulyo, Petek, Garut, Malabar and Seulawah cultivar) and marginally dependent (Burangrang, Sibayak, Tanggamus, Panderman, Ijen, Galunggung, Gepak Kuning and Sinabung cultivar). The chlorophyll content of leaf, the number of stomata and also transpiration rate unrelated with mycorrhizal dependency value whereas photosynthetic rate increases mycorrhizal dependency value

Studi Fenomenologi Mekanisme Koping Penyitas Covid 19 Saat Didiagnosis Positif Covid 19

ABSTRACT In 2020 the world experienced a Covid-19 pandemic, and this affected all aspects of life, especially health. The impact in the world of health is the number of people infected with the Corona virus. This pandemic makes some people experience fear, where the mass media reports a lot about deaths due to being infected with Covid. The existence of this phenomenon shows that it is necessary to conduct a study on how this Covid-19 survivor responds to his illness and survives until he is declared cured by the doctor. Research design: Qualitative, Research participants: Covid-19 survivors who have been declared cured. Results: 4 sub themes were found which resulted in 2 themes, namely: positive thinking and adapting to current circumstances. Conclusion: Participants were able to get through a critical period because they have adaptive internal and external coping mechanisms, so they can survive in a balanced state, both physically and psychologically. In the end, the participants were able to return to health, and were able to do the same activities as before the illness. Keywords: Individual Coping Mechanisms, Survivors of Covid 19, Experienc