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Title:

The performance of RBD palm stearin as cold metal working lubricant by plane strain extrusion test

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Year of Publication:

2007

Document Type:

Conference or Workshop Item ; PeerReviewed

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TJ Mechanical engineering and machinery

TJ Mechanical engineering and machinery Minimize

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S., Syahrullail and S., Kamitani and K., Nakanishi (2007) The performance of RBD palm stearin as cold metal working lubricant by plane strain extrusion test. In: Proceedings of the 1st Engineering Conference Energy and Environment (EnCon 2007), 2007, Crowne Plaza Riverside Hotel, Kuching, Sarawak,.

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Title:

LARGE TIME DECAY AND SCATTERING FOR WAVE MAPS.

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A wave map u: Rn+1 − → M with (M, g) a Riemannian manifold, and Rn+1 the (n+1)-dimensional Minkowski space with Minkwoski metric mµν = diag(−1, 1,. 1), is critical with respect to the functional1 ∫ u → L(u): = ⟨∂αu, ∂ α u⟩gdσ, ∂ α = m αβ ∂β

A wave map u: Rn+1 − → M with (M, g) a Riemannian manifold, and Rn+1 the (n+1)-dimensional Minkowski space with Minkwoski metric mµν = diag(−1, 1,. 1), is critical with respect to the functional1 ∫ u → L(u): = ⟨∂αu, ∂ α u⟩gdσ, ∂ α = m αβ ∂β Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-02-09

Source:

http://www.math.upenn.edu/%7Ekriegerj/papers/WMScatter.pdf

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Document Type:

text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

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Title:

Mean-field theory for a spin-glass model of neural networks: TAP free energy and

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paramagnetic to spin-glass transition

paramagnetic to spin-glass transition Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-11-15

Source:

http://arxiv.org/pdf/cond-mat/9705015v1.pdf

http://arxiv.org/pdf/cond-mat/9705015v1.pdf Minimize

Document Type:

text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

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Title:

A high-frequency radio survey of low-luminosity active galactic nuclei

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Accepted for publication in MNRAS We investigate the high-frequency radio spectra of twenty low-luminosity active galactic nuclei (LLAGNs) with compact radio cores. Our millimetre survey with the Nobeyama Millimetre Array (NMA) and analyses of submillimetre archival data that had been obtained with the Submillimetre Common User Bolometer Array (...

Accepted for publication in MNRAS We investigate the high-frequency radio spectra of twenty low-luminosity active galactic nuclei (LLAGNs) with compact radio cores. Our millimetre survey with the Nobeyama Millimetre Array (NMA) and analyses of submillimetre archival data that had been obtained with the Submillimetre Common User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT) reveal the following properties. At least half of the LLAGNs show inverted spectra between 15 and 96 GHz; we use published data at 15 GHz with the Very Large Array (VLA) in a 0.15-arcsec resolution and our measurements at 96 GHz with the NMA in a 7-arcsec resolution. The inverted spectra are not artificially made due to their unmatched beam sizes, because of little diffuse contamination from dust, Hii regions, or extended jets in these LLAGNs. Such high-frequency inverted spectra are apparently consistent with a ‘submillimetre bump’, which is predicted by an advection-dominated accretion flow (ADAF) model. We find a strong correlation between the high-frequency spectral index and low-frequency core power measured with very-long-baseline-interferometry (VLBI) instruments. The inverted spectra were found exclusively in low-core-power sources, while steep spectra were in high-core-power ones with prominent pc-scale jets. This suggests that the ADAF and nonthermal jets may coexists. The flux ratios between disc and jet seem to be different from LLAGN to LLAGN; disc components can be seen in nuclear radio spectra only if the jets are faint. Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2013-08-06

Source:

http://arxiv.org/pdf/astro-ph/0508598v1.pdf

http://arxiv.org/pdf/astro-ph/0508598v1.pdf Minimize

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text

Language:

en

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defined as a Hα luminosity of < 10 40 ergs s −1

defined as a Hα luminosity of < 10 40 ergs s −1 Minimize

DDC:

520 Astronomy & allied sciences *(computed)*

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

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Title:

GLOBAL DYNAMICS ABOVE THE GROUND STATE ENERGY FOR THE ONE-DIMENSIONAL NLKG EQUATION

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Abstract. In this paper we obtain a global characterization of the dynamics of even solutions to the one-dimensional nonlinear Klein-Gordon (NLKG) equation on the line with focusing nonlinearity |u | p−1 u, p>5, provided their energy exceeds that of the ground state only sightly. The method is the same as in the three-dimensional case [15], the ...

Abstract. In this paper we obtain a global characterization of the dynamics of even solutions to the one-dimensional nonlinear Klein-Gordon (NLKG) equation on the line with focusing nonlinearity |u | p−1 u, p>5, provided their energy exceeds that of the ground state only sightly. The method is the same as in the three-dimensional case [15], the major difference being in the construction of the center-stable manifold. The difficulty there lies with the weak dispersive decay of 1-dimensional NLKG. In order to address this specific issue, we establish local dispersive estimates for the perturbed linear Klein-Gordon equation, similar to those of Mizumachi [14]. The essential ingredient for the latter class of estimates is the absence of a threshold resonance of the linearized operator. 1. Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-02-09

Source:

http://www.math.upenn.edu/%7Ekriegerj/papers/1d_submission.pdf

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text

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en

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Title:

GLOBAL DYNAMICS OF THE NONRADIAL ENERGY-CRITICAL WAVE EQUATION ABOVE THE GROUND STATE ENERGY

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Abstract. In this paper we establish the existence of certain classes of solutions to the energy critical nonlinear wave equation in dimensions 3 and 5 assuming that the energy exceeds the ground state energy only by a small amount. No radial assumption is made. We find that there exist four sets in ˙ H 1 × L 2 with nonempty interiors which corr...

Abstract. In this paper we establish the existence of certain classes of solutions to the energy critical nonlinear wave equation in dimensions 3 and 5 assuming that the energy exceeds the ground state energy only by a small amount. No radial assumption is made. We find that there exist four sets in ˙ H 1 × L 2 with nonempty interiors which correspond to all possible combinations of finite-time blowup on the one hand, and global existence and scattering to a free wave, on the other hand, as t → ±∞. Contents Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2013-07-19

Source:

http://www.math.upenn.edu/~kriegerj/papers/NRCRIT1221.pdf

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text

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en

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Title:

GLOBAL DYNAMICS AWAY FROM THE GROUND STATE FOR THE ENERGY-CRITICAL NONLINEAR WAVE EQUATION

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Abstract. We study global behavior of radial solutions for the nonlinear wave equation with the focusing energy critical nonlinearity in three and five space dimensions. Assuming that the solution has energy at most slightly more than the ground states and gets away from them in the energy space, we can classify its behavior into four cases, acc...

Abstract. We study global behavior of radial solutions for the nonlinear wave equation with the focusing energy critical nonlinearity in three and five space dimensions. Assuming that the solution has energy at most slightly more than the ground states and gets away from them in the energy space, we can classify its behavior into four cases, according to whether it blows up in finite time or scatters to zero, in forward or backward time direction. We prove that initial data for each case constitute a non-empty open set in the energy space. This is an extension of the recent results [15, 16] by the latter two authors on the subcritical nonlinear Klein-Gordon and Schrödinger equations, except for the part of the center manifolds. The key step is to prove the “one-pass ” theorem, which states that the transition from the scattering region to the blow-up region can take place at most once along each trajectory. The main new ingredients are the control of the scaling parameter and the blow-up characterization by Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-02-09

Source:

http://www.math.upenn.edu/%7Ekriegerj/papers/Schlauch1016.pdf

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Document Type:

text

Language:

en

DDC:

541 Physical chemistry *(computed)*

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Title:

Schlag Global dynamics away from the ground state for the energycritical nonlinear wave equation

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Abstract. We study global behavior of radial solutions for the nonlinear wave equation with the focusing energy critical nonlinearity in three and five space dimensions. Assuming that the solution has energy at most slightly more than the ground states and gets away from them in the energy space, we can classify its behavior into four cases, acc...

Abstract. We study global behavior of radial solutions for the nonlinear wave equation with the focusing energy critical nonlinearity in three and five space dimensions. Assuming that the solution has energy at most slightly more than the ground states and gets away from them in the energy space, we can classify its behavior into four cases, according to whether it blows up in finite time or scatters to zero, in forward or backward time direction. We prove that initial data for each case constitute a non-empty open set in the energy space. This is an extension of the recent results [15, 16] by the latter two authors on the subcritical nonlinear Klein-Gordon and Schrödinger equations, except for the part of the center manifolds. The key step is to prove the “one-pass ” theorem, which states that the transition from the scattering region to the blow-up region can take place at most once along each trajectory. The main new ingredients are the control of the scaling parameter and the blow-up characterization by Minimize

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Year of Publication:

2013-07-22

Source:

http://www.press.jhu.edu/journals/american_journal_of_mathematics/future_publications/pre_print_content/AJM-krieger-nakanishi-schlag.pdf

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text

Language:

en

DDC:

541 Physical chemistry *(computed)*

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Contents

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Abstract. We investigate existence and asymptotic completeness of the wave operators for nonlinear Klein-Gordon and Schrödinger equations with a defocusing exponential nonlinearity in two space dimensions. A certain threshold is defined based on the value of the conserved Hamiltonian, below which the exponential potential energy is dominated by ...

Abstract. We investigate existence and asymptotic completeness of the wave operators for nonlinear Klein-Gordon and Schrödinger equations with a defocusing exponential nonlinearity in two space dimensions. A certain threshold is defined based on the value of the conserved Hamiltonian, below which the exponential potential energy is dominated by the kinetic energy via a Trudinger-Moser type inequality. We prove that if the energy is below or equal to the critical value, then the solution approaches a free Klein-Gordon solution at the time infinity. The interesting feature in the critical case is that the Strichartz estimate together with Sobolev-type inequalities can not control the nonlinear term uniformly on each time interval, but with constants depending on how much the solution is concentrated. Thus we have to trace concentration of the energy along time, in order to set up favorable nonlinear estimates, and then to implement Bourgain’s induction argument. We show the same result for the “subcritical ” nonlinear Schrödinger equation. Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2013-08-04

Source:

http://arxiv.org/pdf/0806.3150v1.pdf

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Document Type:

text

Language:

en

DDC:

515 Analysis *(computed)*

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Contents

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Abstract. We investigate existence and asymptotic completeness of the wave operators for nonlinear Klein-Gordon and Schrödinger equations with a defocusing exponential nonlinearity in two space dimensions. A certain threshold is defined based on the value of the conserved Hamiltonian, below which the exponential potential energy is dominated by ...

Abstract. We investigate existence and asymptotic completeness of the wave operators for nonlinear Klein-Gordon and Schrödinger equations with a defocusing exponential nonlinearity in two space dimensions. A certain threshold is defined based on the value of the conserved Hamiltonian, below which the exponential potential energy is dominated by the kinetic energy via a Trudinger-Moser type inequality. We prove that if the energy is below or equal to the critical value, then the solution approaches a free Klein-Gordon solution at the time infinity. The interesting feature in the critical case is that the Strichartz estimate together with Sobolev-type inequalities can not control the nonlinear term uniformly on each time interval, but with constants depending on how much the solution is concentrated. Thus we have to trace concentration of the energy along time, in order to set up favorable nonlinear estimates, and then to implement Bourgain’s induction argument. We show the same result for the “subcritical ” nonlinear Schrödinger equation. Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2013-07-16

Source:

http://www.math.nyu.edu/faculty/masmoudi/ScatteringFinal.pdf

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Document Type:

text

Language:

en

DDC:

515 Analysis *(computed)*

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