Peningkatan Hasil Belajar Matematika melalui Strategi Pembelajaran Mantel Sang Ahli

Penelitian ini bertujuan untuk mengetahui peningkatan hasil belajar matematika dengan menerapkan Strategi Mantel Sang Ahli pada siswa kelas VIIIA SMP Negeri 1 Tinambung Polewali Mandar. Strategi Mantel Sang Ahli adalah suatu strategi yang memanfaatkan kondisi anak yang suka pamer dengan orientasi pembelajaran berpusat pada siswa (student-centred) sehingga dapat mengembangkan motivasi siswa, kreatifitas dan keterampilan mengemukakan ide atau gagasan di depan publik yang akan meningkatkan hasil belajar siswa. Penelitian ini terdiri dari dua siklus. Pengambilan data dilakukan beberapa tahap yaitu : test awal, siklus I dan siklus II. Data yang terkumpul dianalisis dengan menggunakan analisis kualitatif dan kuantitatif. Hasil analisis data memperlihatkan bahwa : (1) pada test awal sebelum diterapkan strategi Mantel Sang Ahli diperoleh nilai rata-rata Hasil belajar matematika siswa sebesar 30,86 dari nilai ideal 100. (2) pada siklus I, diperoleh nilai rata-rata hasil belajar matematika siswa sebesar 60,58 dari nilai ideal 100, sedangkan presentase dari nilai ketuntasan minimal sebesar 41,67 % sehingga masih dilanjutkan ke siklus II. (3) pada siklus II, diperoleh nilai rata-rata hasil belajar matematika siswa sebesar 76,16 dari nilai ideal 100, presentase siswa yang mencapai kriteria ketuntasan minimal sebesar 87,50%. (4) keaktifan siswa terhadap strategi pembelajaran yang digunakan meningkat dilihat dari peningkatan respon positif siswa terhadap situasi yang diberikan dari siklus I ke siklus II. Jadi penerapan Strategi Mantel Sang Ahli dapat meningkatkan hasil belajar matematika siswa kelas VIIIA SMP Negeri 1 Tinambung Kabupaten Polewali Mandar.Kata kunci— Hasil Belajar Matematika, Strategi Pembelajaran, Mantel Sang Ahl

Penerapan Model Pembelajaran Kooperatiftipe Two Stay Two Stray ( Tsts ) Untuk Meningkatkan Hasil Belajar IPS Siswa Kelas V Sdn 016 Sekeladi Rokan Hilir

Abstact: The research aims to find out whether the implementation of two stay two stray (TSTS) method can improve social sciense learning results of class V student in SD Negeri 016 Sekeladi. The type of this research is classroom action research (CAR) with the research subjects are class V students which amounts to 24 students. The data collection techniques used is observation and tests. The research concluded that social sciense learning which using two stay two stray (TSTS) method can improve the teacher's activity, student's activity and social science learning result. At the first meeting of cycle I, the teacher's activity percentage was 56,26% and categorized enouhg, at the second meeting the percentage increased to be 75% and categorized good. For cycle II at the first meeting the percentage was 81,25% and categorized very good, at the second meeting increased to be 91,66% and categorized very good. Then for student's activity cycle I at the first meeting the percentage was 72,91% and categorized good, in the second meeting the percentage was 89,58% and categorized very good. The student's social science learning result from the average grades before action (basic score) was 60,75 increased at cycle I to be 69,79 with the percentage increase by 14,88% and at cycle II the average grades increased to be 73,54 with the percentage increase by 21,05% from the basic score by 60,75

Coherently controlled entanglement generation in a binary Bose-Einstein condensate

Considering a two-component Bose-Einstein condensate in a double-well potential, a method to generate a Bell state consisting of two spatially separated condensates is suggested. For repulsive interactions, the required tunnelling control is achieved numerically by varying the amplitude of a sinusoidal potential difference between the wells. Both numerical and analytical calculations reveal the emergence of a highly entangled mesoscopic state.Comment: 6 pages, 6 figures, epl2.cl

Preparation, Characterization and Electromagnetic Interference Shielding Effectiveness Of Ppy-Pva and Ppy-Cmc Conducting Polymer Composite Films

Polypyrrole-poly(viny1 alcohol) (PPy-PVA) and polypyrrole-carboxymethyl cellulose (PPy-CMC) conducting polymer composite films were electrochemically prepared on Indium Tin Oxide (ITO) glass electrode from an aqueous solution containing pyrrole monomer, p-toluene sulfonate dopant and poly(viny1 alcohol)/carboxymethyl cellulose insulating polymer. The PPy-PVA and PPy- CMC composite films prepared from different process conditions were characterized by Fourier Transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, optical microscopy, dynamic mechanical analysis (DMA), and conductivity measurement. The highest conductivity of 64 Slcm measured at room temperature was shown by PPy-PVA composite film prepared fiom 0.2 M pyrrole, 0.1 M p-toluene sulfonate and 12 x lo4 M PVA at 1.2 volt (vsSCE) among all the PPY-PVA composite films produced. The PPy-CMC composite film prepared from 0.3 M pyrrole, 0.1 M p-toluene sulfonate and 0.03 M CMC at 1.2 volt (vs SCE) showed the highest conductivity of 38 Slcm among all the PPy-CMC composite films produced. The FT-IR study of PPy-PVA and PPy- CMC composite films shows the evidence of the incorporation of PVA and CMC in PPy structure forming PPy-PVA and PPy-CMC composite films, respectively. The conductivity data of PPy-PVA shows that with the increase in PVA concentration in the pyrrole solution, the conductivity of the prepared PPy-PVA film is increasing up to certain level due to the increase in conjugation length and later it is decreasing with further increase in PVA concentration, which is again linked with the conjugation length decrease. This is supported by the FT-IR band intensity of Ic=c/Ic-N. The FT-IR study of PPy-CMC composite films shows that with the increase in CMC concentration from 0.005 M to 0.01 M, the conductivity first decreased and later with further increase in CMC concentration the conductivity showed an increasing trend and finally at 0.04 M CMC, the conductivity dropped. The DMA results of PPy-PVA and PPy-CMC composite films show the enhanced mechanical properties of both the composite films over PPy films without PVA or CMC. The storage moduli of both the composite films were found much higher than the PPy film prepared without PVA or CMC indicating that PPy-PVA and PPy-CMC composite films are much stiffer than PPy films. The gradual decrease of storage moduli of both the composite films with the increase in temperature ranging from 25 "C to 250 "C suggests that the composite films have got flexibility in their chains and thus the chains are soft. On the other hand, the storage modulus of PPy film only without PVA or CMC shows no decreasing tendency with the increase in temperature ranging from 25 "C to 250 "C indicating that the PPy film is very hard and have got no flexibility in its backbone chain. The XRD results of both PPy-CMC and PPy-PVA composite films show that the films are amorphous and have got very little order. The optical micrographs of PPy-CMC and PPy-PVA show the globular surface morphology. The changes in globular surface morphology with the change in process condition of the film preparation indicates that the process parameters used to prepare the composite films have got a good influence over the surface morphology. The intense polymerization reaction has been evidenced from the surface morphology of the films. The results of electromagnetic interference (EMI) shielding effectiveness in the microwave range of 8-12 GHz show that the highest shielding effectiveness of 45.67 dB measured in the microwave range of 8-12 GHz corresponds to the total attenuation of 99.4 % of microwave energy has been exhibited by the Pe-PVA composite film prepared from 0.2 M pyrrole, 0.1 M p-toluene sulfonate and 12 x 10" M PVA at 1.2 volt (vs SCE) among all the PPy-PVA composite films prepared. The highest shielding effectiveness of 35.7 dB measured in the microwave range corresponds to the total attenuation of 98.32 % of microwave energy has been exhibited by the PPy-CMC composite film prepared fiom 0.3 M pyrrole, 0.1 M p-toluene sulfonate and 0.03 M CMC at 1.2 volt (vs SCE) among all the PPy-CMC composite films prepared. Thus, the promise of finding any electromagnetic interference (EMI) shielding applications in the microwave frequency range lies in PPy-PVA and PPy-CMC conducting polymer composite films

In-Vivo Model of Human Allogeneic Stem Cell Rejection in NSG Mice

n/