PENINGKATAN AKTIVITAS MURID DALAM PEMBELAJARAN SAINS DENGAN MENGGUNAKAN METODE DEMONSTRASI KELAS IV SDN 12 SUNGAI AMBAWANG

Abstrak: Aktivitas fisik peserta didik dalam pembelajaran Sains dengan menggunakan metode demonstrasi kelas IV Sekolah Dasar Negeri 12 Sungai Ambawang telah mengalami peningkatan pada penelitian awal 17,78%, siklus 1 51,11%, siklus 2 62,22% dan siklus 3 93,33%. Terjadi peningkatan dari base line ke siklus 3 sebesar 75,55% dengan kategori tinggi. (2) Aktivitas mental peserta didik dalam pembelajaran Sains dengan menggunakan metode demonstrasi kelas IV Sekolah Dasar Negeri 12 Sungai Ambawang mengalami peningkatan dari base line 15,55%, siklus 1 42,22%, siklus 2 57,78%, siklus 3 88,89%, sehingga terjadi peningkatan dari baseline ke siklus 3 sebesar 73,34% dengan kategori tinggi. (3) Aktivitas emosional peserta didik dalam pembelajaran Sains dengan menggunakan metode demonstrasi kelas IV Sekolah Dasar Negeri 12 Sungai Ambawang mengalami peningkatan dari base line 17,78%, siklus 1 42,22%, siklus 2 60%, siklus 3 86,67%, sehingga terjadi peningkatan dari baseline ke siklus 3 sebesar 68,89% dengan kategori tinggi. Kata kunci : aktivitas,metode demonstrasi, sains Abstract: physical activity students in science learning by using the method of class iv state elementary schools 12 river ambawang has increased 17,78 % to early research, a 1 % 51,11 2 cycles cycle 93,33 62,22 % and 3 %.Increase from a line to a 3 % of 75,55 in the category of high.( 2 ) the mental students in science learning by using the method of class iv state elementary schools has increased from 12 river ambawang 15,55 % base line a 1 % 42,22 2 cycles 57,78 %, a 3 % 88,89 so there is an increase from the baseline in the cycle of 73,34 3 % in the highly. ( 3 ) activity emotional students in science learning by using the method of class iv state elementary schools has increased from 12 river ambawang 17,78 % base line a 1 % 42,22 2 cycles 60 %, a 3 % 86,67 so there is an increase from the baseline in the cycle of 68,89 3 % in the highly. Keywords: activity, method demontrasi, science

Phenomenology of models with more than two Higgs doublets

We study the most general Multi-Higgs-Doublet Model (MHDM) with Natural Flavor Conservation (NFC). The couplings of a charged scalar $H_i^{\pm}$ to up quarks, down quarks and charged leptons depend on three new complex parameters, $X_i$, $Y_i$ and $Z_i$, respectively. We prove relations among these parameters. We carry out a comprehensive analysis of phenomenological constraints on the couplings of the lightest charged scalar: $X$, $Y$ and $Z$. We find that the general MHDM may differ significantly from its minimal version, the Two-Higgs-Doublet Model (2HDM).Comment: 28 pages, 8 figures available upon request, LaTeX, WIS-94/3/Jan-P

Tri-Bimaximal Neutrino Mixing and the Family Symmetry Z_7 x Z_3

The Non-Abelian finite group PSL_2(7) is the only simple subgroup of SU(3) with a complex three-dimensional irreducible representation. It has two maximal subgroups, S_4 which, along with its own A_4 subgroup, has been successfully applied in numerous models of flavor, as well as the 21 element Frobenius group Z_7 x Z_3, which has gained much less attention. We show that it can also be used to generate tri-bimaximal mixing in the neutrino sector, while allowing for quark and charged lepton hierarchies.Comment: 15 pages, matches published version, updated reference

Phenomenology of Pseudo Dirac Neutrinos

We formulate general conditions on $3\times 3$ neutrino mass matrices under which a degenerate pair of neutrinos at a high scale would split at low scale by radiative corrections involving only the standard model fields. This generalizes the original observations of Wolfenstein on pseudo Dirac neutrinos to three generations. A specific model involving partially broken discrete symmetry and solving the solar and atmospheric anomalies is proposed. The symmetry pattern of the model naturally generates two large angles one of which can account for the large angle MSW solution to the solar neutrino problem.Comment: 15 pages LATE

Comparative study of the functional properties of lupin, green pea, fava bean, hemp, and buckwheat flours as affected by pH

Acknowledgments This work is part of the Strategic Research 2011–2016 and is funded by the Scottish Government’s Rural and Environment Science and Analytical Services Division (RESAS).Peer reviewedPublisher PD

Soft Yukawa couplings in supersymmetric theories

The possibility of radiatively generated fermion masses arising from chiral flavor violation in soft supersymmetry-breaking terms is explored. Vacuum stability constraints are considered in various classes of models, and allow in principle all of the first- and second-generation quarks and leptons and the $b$-quark to obtain masses radiatively. Radiatively induced Higgs-fermion couplings have non-trivial momentum-dependent form factors, which at low momentum are enhanced with respect to the case of tree-level Yukawa couplings. These form factors may be probed by various sum rules and relations among Higgs boson decay widths and branching ratios to fermion final states. An apparent, large, hard violation of supersymmetry also results for Higgsino couplings. Mixing between left- and right-handed scalar superpartners is enhanced. A radiative muon mass is shown to lead to a relatively large and potentially measurable contribution to the muon anomalous magnetic moment. If the light-quark masses arise radiatively, the neutron electric dipole moment is suppressed by a natural phase alignment between the masses and dipole moment, and is below the current experimental bound. The possibility of neutrino masses arising from softly broken lepton number, and concomitant enhanced sneutrino-antisneutrino oscillations, is briefly discussed.Comment: 66 pages. LaTex + RevTex. 16 figures (included). Published version (minor changes and typos corrected

Natural R-Parity, \mu-term, and Fermion Mass Hierarchy From Discrete Gauge Symmetries

In the minimal supersymmetric Standard Model with seesaw neutrino masses we show how R-parity can emerge naturally as a discrete gauge symmetry. The same discrete symmetry explains the smallness of the \mu-term (the Higgsino mass parameter) via the Giudice--Masiero mechanism. The discrete gauge anomalies are cancelled by a discrete version of the Green--Schwarz mechanism. The simplest symmetry group is found to be Z_4 with a charge assignment that is compatible with grand unification. Several other Z_N gauge symmetries are found for N=10,12,18,36 etc, with some models employing discrete anomaly cancellation at higher Kac-Moody levels. Allowing for a flavor structure in Z_N, we show that the same gauge symmetry can also explain the observed hierarchy in the fermion masses and mixings.Comment: 22 pages, LaTe