4,290 research outputs found
Kaons and Hyperons rare decays by the NA48 experiment at CERN
Some Kaons and Hyperons rare decays branching ratios and form factors were
measured by the NA48 experiment at CERN. The details of the measurements and
their importance for the understanding of the CKM quark mixing matrix are
discussed.Comment: Talk given at the HEP-MAD04 conference held in
Antananarivo(Madagascar) from Septembere 27th to October 3rd, 200
A Simple Multi-Directional Absorbing Layer Method to Simulate Elastic Wave Propagation in Unbounded Domains
The numerical analysis of elastic wave propagation in unbounded media may be
difficult due to spurious waves reflected at the model artificial boundaries.
This point is critical for the analysis of wave propagation in heterogeneous or
layered solids. Various techniques such as Absorbing Boundary Conditions,
infinite elements or Absorbing Boundary Layers (e.g. Perfectly Matched Layers)
lead to an important reduction of such spurious reflections. In this paper, a
simple absorbing layer method is proposed: it is based on a Rayleigh/Caughey
damping formulation which is often already available in existing Finite Element
softwares. The principle of the Caughey Absorbing Layer Method is first
presented (including a rheological interpretation). The efficiency of the
method is then shown through 1D Finite Element simulations considering
homogeneous and heterogeneous damping in the absorbing layer. 2D models are
considered afterwards to assess the efficiency of the absorbing layer method
for various wave types and incidences. A comparison with the PML method is
first performed for pure P-waves and the method is shown to be reliable in a
more complex 2D case involving various wave types and incidences. It may thus
be used for various types of problems involving elastic waves (e.g. machine
vibrations, seismic waves, etc)
Modelling strong seismic ground motion: three-dimensional loading path versus wavefield polarization
Seismic waves due to strong earthquakes propagating in surficial soil layers
may both reduce soil stiffness and increase the energy dissipation into the
soil. To investigate seismic wave amplification in such cases, past studies
have been devoted to one-directional shear wave propagation in a soil column
(1D-propagation) considering one motion component only (1C-polarization). Three
independent purely 1C computations may be performed ('1D-1C' approach) and
directly superimposed in the case of weak motions (linear behaviour). This
research aims at studying local site effects by considering seismic wave
propagation in a 1-D soil profile accounting for the influence of the 3-D
loading path and non-linear hysteretic behaviour of the soil. In the proposed
'1D-3C' approach, the three components (3C-polarization) of the incident wave
are simultaneously propagated into a horizontal multilayered soil. A 3-D
non-linear constitutive relation for the soil is implemented in the framework
of the Finite Element Method in the time domain. The complex rheology of soils
is modelled by mean of a multisurface cyclic plasticity model of the
Masing-Prandtl-Ishlinskii-Iwan type. The great advantage of this choice is that
the only data needed to describe the model is the modulus reduction curve. A
parametric study is carried out to characterize the changes in the seismic
motion of the surficial layers due to both incident wavefield properties and
soil non-linearities. The numerical simulations show a seismic response
depending on several parameters such as polarization of seismic waves, material
elastic and dynamic properties, as well as on the impedance contrast between
layers and frequency content and oscillatory character of the input motion. The
3-D loading path due to the 3C-polarization leads to multi-axial stress
interaction that reduces soil strength and increases non-linear effects. The
non-linear behaviour of the soil may have beneficial or detrimental effects on
the seismic response at the free surface, depending on the energy dissipation
rate. Free surface time histories, stress-strain hysteresis loops and in-depth
profiles of octahedral stress and strain are estimated for each soil column.
The combination of three separate 1D-1C non-linear analyses is compared to the
proposed 1D-3C approach, evidencing the influence of the 3C-polarization and
the 3-D loading path on strong seismic motions
Recorded displacements in a landslide slope due to regional and teleseismic earthquakes
Regional and teleseismic earthquakes can induce displacements along joints in a landslideinvolved
rocky slope in Central Italy. The rarity of these effects is due to specific physical
properties of the seismic signals associated with: (i) the energy content, (ii) the distribution of
relative energy and peak of ground acceleration related to the ground motion components and
(iii) the spectral amplitude distribution in the frequency domain; these properties allow the
triggering earthquakes to be distinguished from the others. The observed effects are relevant
when compared to the direction of the landslide movement and the dimensions of the involved
rock mass volume. The landslide movement is less constrained in the direction parallel to the
dip of the slope and the landslide dimensions are associated with characteristic periods that
control the landslide deformational response in relation to the spectral content of the ground
motion. The earthquake-induced displacements are significant because they have the same
order of magnitude as the average annual cumulative displacement based on a decade of strain
measurements within the slope
PENGARUH PEMBELAJARAN PJOK TERHADAP KECERDASAN EMOSIONAL DAN KECERDASAN SOSIAL SISWA
Lenti Fatmawati. NIM. 1602263. Skripsi: PENGARUH PEMBELAJARAN PJOK TERHADAP KECERDASAN EMOSIONAL DAN KECERDASAN SOSIAL SISWA. Skripsi ini dibimbing oleh Drs. Mudjihartono, M.Pd., dan Dr. Helmy Firmansyah, M. Pd. Program Studi Pendidikan Jasmani Kesehatan dan Rekreasi. Universitas Pendidikan Indonesia.
Tujuan dalam penelitian ini adalah untuk menganalisis pengaruh pembelajaran PJOK terhadap kecerdasan emosional dan kecerdasan sosial siswa. Penelitian menyebutkan bahwa siswa remaja pada masa sekolah dihadapkan pada masalah gangguan emosi dan sosial yang parah. Factor risiko dari gangguan emosi tersebut adalah seperti keterikatan yang lemah yang lemah terhadap sekolah dan rendahnya kemampuan akademik dikalangan remaja (Harlacher & Merrell, 2010). Penelitian ini menggunakan metode ekspost fakto dengan teknik penyebaran angket. Teknik analisis data yang digunakan pada penelitian ini adalah korelasi pearson produk momen. Instrumen yang digunakan dalam penelitian ini berupa angket kecerdasan emosonal yang diadopsi dari jurnal yang berjudul “A Psychometric Analysis Of the Trait Emotional Intelligence Questionnaire-Short Form (TEIQue-SF) Using Item Response Theory” oleh (Cooper, 2010), serta angket kecerdasan sosial yang diadopsi dari jurnal yang berjudul “Can Social Intelligence Be Measured?Psychometric Properties Of The Tromso Social Intelligence Scale – English Version” oleh (Silvera, 2001. Berdasarkan hasil analisis dan pengolahan data, pada pengaruh pembelajaran PJOK terhadap kecerdasan emosional siswa diperoleh nilai sig = 0.040 < 0.05 yang artinya Ho ditolak atau terdapat pengaruh yang signifikan antara pembelajaran PJOK terhadap kecerdasan emosional siswa. Sedangkan pada pegaruh dari pembelajaran PJOK terhadap kecerdasan sosial siswa diperoleh nilai sig = 0.03 < 0.05 yang artinya Ho ditolak atau terdapat pengaruh yang signifikan antara pembelajaran PJOK terdahap kecerdasan sosial siswa.
Kata kunci: Pembelajaran PJOK, Kecerdasan Emosional, Kecerdasan Sosial.
Lenti Fatmawati. NIM. 1602263. Thesis: EFFECT OF PJOK LEARNING ON STUDENT'S EMOTIONAL INTELLIGENCE AND SOCIAL INTELLIGENCE .This thesis is guided by Drs. Mudjihartono, M.Pd., and Dr. Helmy Firmansyah, M.Pd. Study Program Phycisal Education Health and Recreation. Indonesian Education University.
The purpose of this study was to analyze the effect of PJOK learning on students' emotional and social intelligence. Research states that a dolescent students during schooling are faced with severe emotional and social problems. Risk factors for emotional disturbances are weak attachment to school and poor academic ability among adolescents (Harlacher & Merrell, 2010). This research uses facto expost method with questionnaire distribution technique. The data analysis technique used in this study is Pearson correlation of moment products. The instrument used in this study was an emotional intelligence questionnaire adopted from a journal entitled "A Psychometric Analysis of the Trait Emotional Intelligence Questionnaire-Short Form (TEIQue-SF) Using Item Response Theory" by (Cooper, 2010), as well as a social intelligence questionnaire which was adopted from a journal entitled "Can Social Intelligence Be Measured? Psychometric Properties Of The Tromso Social Intelligence Scale - English Version" by (Silvera, 2001. Based on the results of analysis and data processing, on the effect of PJOK learning on students' emotional intelligence obtained sig = 0.040 <0.05 which means Ho is rejected or there is a significant influence between learning PJOK on emotional intelligence of students, while the influence of PJOK learning on social intelligence of students is obtained sig = 0.03 <0.05 which means Ho is rejected or there is a significant influence between learning PJOK stepped up student social intelligence.
Keywords: Learning PJOK, Emotional Intelligence, Social Intelligence
STEGANOGRAPHIC METHODS
In this paper we analyze and test several steganographic techniques on still images.
We show that embedding a large amount of data into the picture it can modify
its visible properties. We compare the RSA and the elliptic curve (ECC) based
digital signatures, and we analyze their advantages and disadvantages in
steganography. In steganography it is important that the embedded data size should
be minimized. Using ECC minimization of the embedded information is possible,
because the minimal block size is smaller than in the case of RSA
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