搜索结果: 61-75 共查到“理学 Origin”相关记录259条 . 查询时间(0.031 秒)
Homochirality through Photon-Induced Melting of RNA/DNA: the Thermodynamic Dissipation Theory of the Origin of Life
Homochirality Photon-Induced Melting RNA/DNA
2011/1/13
The homochirality of the molecules of life has been a vexing problem with no generally accepted solution to date. Since a racemic mixture of chiral nucleotides frustrates the extension and replication...
Possible Origin of the Anomalous Far-infrared Absorption by Small Metal Particles
Origin of the Anomalous Far-infrared Absorption Small Metal Particles
2010/11/18
We have carried out far-infrared (far-IR) transmission measurements on the ligand stabilized
Au55 particles dispersed in CsI at volume fraction f = 0.002. We have found that while the
absorption coe...
The Absence of Cold Dust and the Mineralogy and Origin of the Warm Dust Encircling BD +20 307
Cold Dust the Mineralogy the Warm Dust Encircling
2011/1/13
Spitzer Space Telescope photometry and spectroscopy of BD +20 307 show that all of the dust around this remarkable Gyr-old spectroscopic binary arises within 1 AU. No additional cold dust is needed to...
The origin of the Broad Line Region in Active Galactic Nuclei
the Broad Line Active Galactic Nuclei
2011/1/13
Although broad emission lines are the most reliable signature of the nuclear activity of a galaxy and the location of the emitting material is well measured by the reverberation method, the physical ...
Galactic cirrus emission at far-infrared wavelengths affects many extragalactic observations. Separating this emission from that associated with extragalactic objects is both important and difficult. ...
Origin of the pseudogap and its influence on superconducting state
Origin of the pseudogap superconducting state
2010/11/23
When holes move in the background of strong antiferromagnetic correlation, two spatial scales
emerge which lead to a much reduced hopping integral with an additional phase factor. By taking
these tw...
Origin of the Ultrahigh-Energy Cosmic Rays and their Spectral Break
Ultrahigh-Energy Cosmic Rays Spectral Break
2010/11/15
In this concise, albeit subjective review of structure formation, I shall introduce the cosmological standard model and its theoretical and observational underpinnings. I will focus on recent results ...
A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
coincidence problem size origin of hierarchy
2010/11/16
Without assuming necessary conditions for observers such as galaxies or entropy production, we
show that the causal patch measure predicts the coincidence of vacuum energy and present matter
density...
A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
geometric solution coincidence problem landscape
2010/12/21
Without assuming necessary conditions for observers such as galaxies or entropy production, we
show that the causal patch measure predicts the coincidence of vacuum energy and present matter
density...
Here the Origin of the pseudogap in HTSC is attributed to the modulated ntiferromagnetic (AFM) phase, whose preliminary version has been sketched recently by the present author [1]. Starting from the ...
Origin and Dynamical Evolution of Neptune Trojans - II: Long Term Evolution
Kuiper Belt celestial mechanics minor planets asteroids – Solar system
2010/11/10
Following our earlier work studying the formation of the Neptunian Trojan population during the
planet’s migration, we present results examining the eventual fate of the Trojan clouds produced in tha...
Origin and Dynamics of the Mutually Inclined Orbits of Upsilon Andromedae c and d
Origin Dynamics Mutually Inclined Orbits
2010/11/12
We evaluate the orbital evolution and several plausible origins scenarios for the mutually inclined orbits of υ And c and d. These two planets have orbital ele-ments that oscillate with large amplitud...
The Origin of [OII] Emission in Recently Quenched AGN Hosts
galaxies active — galaxies clusters general — galaxies evolution X-rays galaxies
2010/11/11
We have employed emission-line diagnostics derived from DEIMOS and NIRSPEC spectroscopy to
determine the origin of the [OII] emission line observed in six AGN hosts at z 0.9. These galaxies are a s...
In this concise, albeit subjective review of structure formation, I shall introduce the cosmological standard model and its theoretical and observational underpinnings. I will focus on recent results ...
We use molecular dynamics with a first-principles based shell model potential to study pyroelec-tricity in lithium niobate. We find that the primary pyroelectric effect is dominant, and pyroelec-trici...