3,584 research outputs found
Pengembangan Model Integrasi Kano-QFD Untuk Mengoptimalkan Kepuasan Konsumen Dengan Mempertimbangkan Keterbatasan Dana Pengembangan
. This study develops a model of integration between the application of the concept of Kano in QFD framework and considering the use of product development costs. Kano concept would classify the product attributes into 5 categories: reverse, indifference, one-dimensional, must-be, dan attractive. These attributes are given different weights based on the influence of these attributes on the level of consumer satisfaction. Furthermore, the allocation process of product development by taking into account the contribution of the cost of each technical response. The result of the integration is allocate development funds for must-be attributes and do not allocate to the reverse and indifference attributes. Thus, companies avoid the development of product attributes indifference and reverse that does not give effect to increasing customer satisfaction so that it saves development costs. The results of this model are all the technical response both in the category of must-be, one-dimensional and attractive product development funds be allocated with total costs of 353,30
Lightning a Fundamental of Atmospheric Electricity
This paper discussed briefly the basic connection between lightning phenomena and atmospheric electricity.
Characteristics pertaining to lightning discharges were reviewed in order to elucidate some elementary mystics that are
still associated with lightning events in some parts of the world and that lightning strike when and where it will. Various
lightning protection principles were discussed. The essence of lightning protection device is to prevent lightning strikes
from taking place over or around an installation or structure
Chalk cliff retreat in East Sussex and Kent 1870s to 2001
The retreat of chalk cliffs fringing the eastern English Channel contributes shingle to the beaches which helps to protect the cliffs and slow down erosion. Conversely, cliff retreat endangers settlements and infrastructure on the clifftop. Rates of retreat have been calculated by a variety of methods over the past century, but no attempt has been made to provide a complete coverage that allows for a true comparison of retreat rates over the entire coastline. Using historic maps and recent orthophotos, cliff retreat rates have been calculated for consecutive 50 m sections of chalk cliff along the English side of the entire eastern English Channel for a period of 125 years. The chalk cliffs of East Sussex erode at an average rate of 0.25 - 0.3 m y−1 while those in Kent at a rate of 0.1 m y−1
High-order harmonic generation in Xe, Kr, and Ar driven by a 2.1-\mu m source: high-order harmonic spectroscopy under macroscopic effects
We experimentally and numerically study the atomic response and pulse
propagation effects of high-order harmonics generated in Xe, Kr, and Ar driven
by a 2.1-\mu m infrared femtosecond light source. The light source is an
optical parametric chirped-pulse amplifier, and a modified strong-field
approximation and 3-dimensional pulse propagation code are used for the
numerical simulations. The extended cutoff in the long-wavelength driven
high-harmonic generation has revealed the spectral shaping of high-order
harmonics due to the atomic structure (or photo-recombination cross-section)
and the macroscopic effects, which are the main factors of determining the
conversion efficiency besides the driving wavelength. Using precise numerical
simulations to determine the macroscopic electron wavepacket, we are able to
extract the photo-recombination cross-sections from experimental high-order
harmonic spectra in the presence of macroscopic effects. We have experimentally
observed that the macroscopic effects shift the observed Cooper minimum of Kr
from 80 eV to 60-70 eV and wash out the Cooper minimum of Ar. Measured
high-harmonic conversion efficiencies per harmonic near the cutoff are ~10^{-9}
for all three gases.Comment: 19 pages, 8 figure
Resonance absolute quantum reflection at selected energies
The possibility of the resonance reflection (100 % at maximum) is revealed.
The corresponding exactly solvable models with the controllable numbers of
resonances, their positions and widths are presented.Comment: 5 pages, 2 figure
Magnetic Field Limitations on Advection Dominated Flows
Recent papers discussing advection dominated accretion flows (ADAF) as a
solution for astrophysical accretion problems should be treated with some
caution because of their uncertain physical basis. The suggestions underlying
ADAF involve ignoring the magnetic field reconnection in heating of the plasma
flow, assuming electron heating due only to binary Coulomb collisions with
ions. Here, we analyze the physical processes in optically thin accretion flows
at low accretion rates including the influence of an equipartition turbulent
magnetic field. For these conditions there is continuous destruction of
magnetic flux by reconnection.
The reconnection is expected to significantly heat the electrons which can
efficiently emit magnetobremstrahlung radiation. Because of this electron
emission, the radiative efficiency of the ADAF is not small. We suggest that
the small luminosities of nearby galactic black holes is due to outflows rather
than ADAF accretion.Comment: 7 pages, 3 figures, Submitted to Ap
Spontaneous emission and lifetime modification caused by an intense electromagnetic field
We study the temporal evolution of a three-level system (such as an atom or a
molecule), initially prepared in an excited state, bathed in a laser field
tuned at the transition frequency of the other level. The features of the
spontaneous emission are investigated and the lifetime of the initial state is
evaluated: a Fermi "golden rule" still applies, but the on-shell matrix
elements depend on the intensity of the laser field. In general, the lifetime
is a decreasing function of the laser intensity. The phenomenon we discuss can
be viewed as an "inverse" quantum Zeno effect and can be analyzed in terms of
dressed states.Comment: 25 pages, 6 figure
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