355 research outputs found
The spectral dimension of random trees
We present a simple yet rigorous approach to the determination of the
spectral dimension of random trees, based on the study of the massless limit of
the Gaussian model on such trees. As a byproduct, we obtain evidence in favor
of a new scaling hypothesis for the Gaussian model on generic bounded graphs
and in favor of a previously conjectured exact relation between spectral and
connectivity dimensions on more general tree-like structures.Comment: 14 pages, 2 eps figures, revtex4. Revised version: changes in section
I
The Effectiveness of Accounting E-module Integrated with Character Value to Improve Students' Learning Outcomes and Honesty
This study aimed to examine the effectiveness of e-accounting module integrated character values to improve students' learning outcomes and honesty. This was motivated by lack of students' understanding of accounting materials so that students tended to take dishonest actions like cheating while doing assignments or examinations. Honesty is one of the characters developed in many curriculla, so that honest character needs to be integrated in learning activities. The data collected in this study were the data on students' learning outcomes collected through multiple choice tests and the data on students' honesty collected through questionnaires. Students' learning outcomes data were analyzed through independent sample t test and the data on students' honesty were analyzed descriptively by narrative. The t test results obtained sig values 0.014 < 0.05 so that there were significant differences between the learning outcomes of the experimental class and the control class. The results of the questionnaire analysis showed that the students' honesty level of the experimental class was in a very good category and the control class was in the good category
The statistical geometry of scale-free random trees
The properties of scale-free random trees are investigated using both
preconditioning on non-extinction and fixed size averages, in order to study
the thermodynamic limit. The scaling form of volume probability is found, the
connectivity dimensions are determined and compared with other exponents which
describe the growth. The (local) spectral dimension is also determined, through
the study of the massless limit of the Gaussian model on such trees.Comment: 21 pages, 2 figures, revtex4, minor changes (published version
On the Beta Function for Anisotropic Current Interactions in 2D
By making use of current-algebra Ward identities we study renormalization of
general anisotropic current-current interactions in 2D. We obtain a set of
algebraic conditions that ensure the renormalizability of the theory to all
orders. In a certain minimal prescription we compute the beta function to all
orders.Comment: 7 pages, 6 figures. v2: References added and typos corrected; v3:
cancellation of finite parts more accurately state
Spectral partitions on infinite graphs
Statistical models on infinite graphs may exhibit inhomogeneous thermodynamic
behaviour at macroscopic scales. This phenomenon is of geometrical origin and
may be properly described in terms of spectral partitions into subgraphs with
well defined spectral dimensions and spectral weights. These subgraphs are
shown to be thermodynamically homogeneous and effectively decoupled.Comment: 8 pages, to appear on Journal of Physics
Boundary energy and boundary states in integrable quantum field theories
We study the ground state energy of integrable quantum field theories
with boundaries (the genuine Casimir effect). In the scalar case, this is done
by introducing a new, ``R-channel TBA'', where the boundary is represented by a
boundary state, and the thermodynamics involves evaluating scalar products of
boundary states with all the states of the theory. In the non-scalar,
sine-Gordon case, this is done by generalizing the method of Destri and De
Vega. The two approaches are compared. Miscellaneous other results are
obtained, in particular formulas for the overall normalization and scalar
products of boundary states, exact partition functions for the critical Ising
model in a boundary magnetic field, and also results for the energy, excited
states and boundary S-matrix of and minimal models.Comment: 3 figures in the separate compressed file, 42 page
Analisis Kepuasan Peserta Sertifikasi K3 Terhadap Pelayanan LSP “PPT Migas” Di Pusdiklat Migas Dengan Integrasi IPA-Kano
Tenaga kerja migas memiliki tingkat resiko kerja tinggi, sehingga wajib memiliki sertifikat kompetensi tenaga teknis khusus migas, salah satunya adalah bidang K3. Badan yang bertugas memberikan layanan sertifikasi di antaranya adalah LSP “PPT Migas” di Pusdiklat Migas. Sebagai pelayanan SDM di bidang migas, tentunya LSP “PPT Migas” di Pusdiklat Migas perlu menadapatkan perhatian lebih terutama berkaitan dengan kualitas pelayanannya. Sehingga pada penelitian ini akan dibahas mengenai kepuasan peserta sertifikasi K3 terhadap pelayanan LSP “PPT Migas” di Pusdiklat Migas, yang dianalisis menggunakan integrasi IPA-Kano. Pendekatan ini bertujuan untuk membantu pihak LSP “PPT Migas” di Pusdiklat Migas dalam mengevaluasi kepuasan peserta sertifikasi K3, yaitu dnegan mengidentifikasi atribut layanan apa yang perlu mendapat prioritas untuk diting-katkan. Selanjutnya dari model ini, dapat diidentifikasi rekomendasi perbaikan yang dapat dilakukan LSP “PPT Migas” di Pusdiklat Migas. Pada penelitian ini, data yang digunakan adalah data primer, yang diperoleh melalui survei kepu-asan terhadap peserta sertifikasi terhadap pelayanan LSP “PPT Migas” yang dilaksanakan pada 22-24 Maret dan 05-07 April 2016. Tingkat kepuasan peserta sertifikasi K3 secara menyeluruh terhadap kinerja LSP “PPT Migas” di Pusdiklat Migas sebesar 76,21%. Dari 24 atribut kualitas pelayanan yang diukur, atribut yang mendapatkan prioritas pertama untuk diperbaiki adalah kebersihan ruang ujian dan toilet
Affine Toda field theory from tree unitarity
Elasticity property (i.e. no-particle creation) is used in the tree level
scattering of scalar particles in 1+1 dimensions to construct the affine Toda
field theory(ATFT) associated with root systems of groups and
. A general prescription is given for constructing ATFT (associated
with rank two root systems) with two self conjugate scalar fields. It is
conjectured that the same method could be used to obtain the other ATFT
associated with higher rank root systems.Comment: 22 pages, 50 postscript figure files, Latex2e Added reference, typos
corrected, minor text modificatio
Sine-Gordon Model - Renormalization Group Solutions and Applications
The sine-Gordon model is discussed and analyzed within the framework of the
renormalization group theory. A perturbative renormalization group procedure is
carried out through a decomposition of the sine-Gordon field in slow and fast
modes. An effective slow modes's theory is derived and re-scaled to obtain the
model's flow equations. The resulting Kosterlitz-Thouless phase diagram is
obtained and discussed in detail. The theory's gap is estimated in terms of the
sine-Gordon model paramaters. The mapping between the sine-Gordon model and
models for interacting electrons in one dimension, such as the g-ology model
and Hubbard model, is discussed and the previous renormalization group results,
obtained for the sine-Gordon model, are thus borrowed to describe different
aspects of Luttinger liquid systems, such as the nature of its excitations and
phase transitions. The calculations are carried out in a thorough and
pedagogical manner, aiming the reader with no previous experience with the
sine-Gordon model or the renormalization group approach.Comment: 44 pages, 7 figure
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