Incorporating Wikipedia in the Classroom to Improve Science Learning and Communication

Wikipedia, the digital encyclopedia, has approximately 15 billion page views a month and is a platform where editors worldwide collaborate to improve content on topics, including the questions above. Wikipedia supports science communication in several ways. It helps readers comprehend information and contributors clarify the meaning and implications of scientific knowledge. The anatomy of Wikipedia is symmetric, allowing for ease in contribution and discussion. Wikipedia-based assignments range from making small edits, such as copyediting a series of science-related topics, adding citations, or inserting internal links to existing Wikipedia pages, to more substantial contributions. Challenges faced by students necessitate \u27just-in-time instruction on reference reliability, content incorporation, and rules regarding plagiarism. Students in \u27Natural Disturbances and Society\u27 are tasked to contribute content to a series of disturbance articles on Wikipedia based on research in primary literature. Substantial contribution to Wikipedia can be as simple as locating and expanding a Stub, short undeveloped articles on a notable topic

Statistical fluctuations of the parametric derivative of the transmission and reflection coefficients in absorbing chaotic cavities

Motivated by recent theoretical and experimental works, we study the statistical fluctuations of the parametric derivative of the transmission T and reflection R coefficients in ballistic chaotic cavities in the presence of absorption. Analytical results for the variance of the parametric derivative of T and R, with and without time-reversal symmetry, are obtained for both asymmetric and left-right symmetric cavities. These results are valid for arbitrary number of channels, in completely agreement with the one channel case in the absence of absorption studied in the literature.Comment: Modified version as accepted in PR

Uji Efektivitas Pupuk Organonitrofos Dan Kombinasinya Dengan Pupuk Anorganik Terhadap Serapan Hara Dan Produksi Tanaman Jagung (Zea Mays L.) Pada Musim Tanam Ke Dua Di Tanah Ultisols Gedong Meneng

Pupuk Organonitrofos merupakan pupuk organik baru yang terbuat dari pencampuran kotoran sapi dengan batuan fosfat alam yang diperkaya mikroorganisme penambat N dan pelarut P. Penelitian ini bertujuan untuk mengetahui efektivitas pupuk Organonitrofos dan kombinasinya dengan pupuk anorganik terhadap pertumbuhan, serapan hara, dan produksi tanaman jagung. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) terdiri dari 6 perlakuan yaitu A (kontrol), B (900 kg urea ha-1, 250 kg SP-36 ha-1, 250 kg KCl ha-1), C (600 kg urea ha-1, 150 kg SP-36 ha-1, 150 kg KCl ha-1, 500 kg Organonitrofos ha-1), D (150 kg urea ha-1, 50 kg SP-36 ha-1, 100 kg KCl ha-1, 1.000 kg Organonitrofos ha-1), E (100 kg urea ha-1, 50 kg SP-36 ha-1, 100 kg KCl ha-1, 2.000 kg Organonitrofos ha-1), dan F (3.000 kg Organonitrofos ha-1) dengan 3 ulangan. Hasil penelitian menunjukkan bahwa pupuk Organonitrofos mampu mengurangi penggunaan pupuk anorganik. Berdasarkan perhitungan standar deviasi kombinasi antara pupuk anorganik dan Organonitrofos pada perlakuan D dengan dosis 150 kg urea ha-1, 50 kg SP36 ha-1, 100 kg KCl ha-1, 1.000 kg Organonitrofos ha-1 menunjukkan hasil pertumbuhan, produksi, serta serapan hara N, P, dan K total tertinggi. Perlakuan D juga paling efektif terhadap biomass total tanaman jagung berdasarkan perhitungan Relative Agronomic Effectiveness yaitu sebesar 125,33 %. Serapan hara N, P, dan K berkorelasi dengan tinggi tanaman, bobot pipilan kering serta bobot berangkasan tanaman, kecuali antara serapan P dengan tinggi tanaman

Modelling gravity on a hyper-cubic lattice

We present an elegant and simple dynamical model of symmetric, non-degenerate (n x n) matrices of fixed signature defined on a n-dimensional hyper-cubic lattice with nearest-neighbor interactions. We show how this model is related to General Relativity, and discuss multiple ways in which it can be useful for studying gravity, both classical and quantum. In particular, we show that the dynamics of the model when all matrices are close to the identity corresponds exactly to a finite-difference discretization of weak-field gravity in harmonic gauge. We also show that the action which defines the full dynamics of the model corresponds to the Einstein-Hilbert action to leading order in the lattice spacing, and use this observation to define a lattice analogue of the Ricci scalar and Einstein tensor. Finally, we perform a mean-field analysis of the statistical mechanics of this model.Comment: 5 page

Composite fermion wave functions as conformal field theory correlators

It is known that a subset of fractional quantum Hall wave functions has been expressed as conformal field theory (CFT) correlators, notably the Laughlin wave function at filling factor $\nu=1/m$ ($m$ odd) and its quasiholes, and the Pfaffian wave function at $\nu=1/2$ and its quasiholes. We develop a general scheme for constructing composite-fermion (CF) wave functions from conformal field theory. Quasiparticles at $\nu=1/m$ are created by inserting anyonic vertex operators, $P_{\frac{1}{m}}(z)$, that replace a subset of the electron operators in the correlator. The one-quasiparticle wave function is identical to the corresponding CF wave function, and the two-quasiparticle wave function has correct fractional charge and statistics and is numerically almost identical to the corresponding CF wave function. We further show how to exactly represent the CF wavefunctions in the Jain series $\nu = s/(2sp+1)$ as the CFT correlators of a new type of fermionic vertex operators, $V_{p,n}(z)$, constructed from $n$ free compactified bosons; these operators provide the CFT representation of composite fermions carrying $2p$ flux quanta in the $n^{\rm th}$ CF Landau level. We also construct the corresponding quasiparticle- and quasihole operators and argue that they have the expected fractional charge and statistics. For filling fractions 2/5 and 3/7 we show that the chiral CFTs that describe the bulk wave functions are identical to those given by Wen's general classification of quantum Hall states in terms of $K$-matrices and $l$- and $t$-vectors, and we propose that to be generally true. Our results suggest a general procedure for constructing quasiparticle wave functions for other fractional Hall states, as well as for constructing ground states at filling fractions not contained in the principal Jain series.Comment: 26 pages, 3 figure

Finding the Pion in the Chiral Random Matrix Vacuum

The existence of a Goldstone boson is demonstrated in chiral random matrix theory. After determining the effective coupling and calculating the scalar and pseudoscalar propagators, a random phase approximation summation reveals the massless pion and massive sigma modes expected whenever chiral symmetry is spontaneously broken.Comment: 3 pages, 1 figure, revte

On the stationary points of the TAP free energy

In the context of the p-spin spherical model, we introduce a method for the computation of the number of stationary points of any nature (minima, saddles, etc.) of the TAP free energy. In doing this we clarify the ambiguities related to the approximations usually adopted in the standard calculations of the number of states in mean field spin glass models.Comment: 11 pages, 1 Postscript figure, plain Te