29,487 research outputs found
Post-Crisis Financial Reform in Korea: A Critical Appraisal
In the aftermath of the economic crisis of 1997-98 South Korea has undertaken a number of financial reforms under IMF auspices. One of such reforms was in financial supervision, which created the Financial Supervisory Commission and the Financial Supervisory Service. In spite of these reforms Korea has recently experienced a costly financial instability relating to credit-card companies and household debts. Korea’s success in bringing about rapid economic recovery from the crisis may have lessened, as suggested by the World Bank, the urgency for full financial reform. This paper, however, argues that the newly created supervisory agencies, although created as independent agencies, have not in fact functioned as such and thus failed to carry out proper supervision over credit-card companies. It is argued that those agencies have not been able to function independently due to institutional constraints imposed on them by other extant, formal as well as informal, institutions in Korea.Financial reform, financial supervision, institutions
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System-level key performance indicators for building performance evaluation
Quantifying building energy performance through the development and use of key performance indicators (KPIs) is an essential step in achieving energy saving goals in both new and existing buildings. Current methods used to evaluate improvements, however, are not well represented at the system-level (e.g., lighting, plug-loads, HVAC, service water heating). Instead, they are typically only either measured at the whole building level (e.g., energy use intensity) or at the equipment level (e.g., chiller efficiency coefficient of performance (COP)) with limited insights for benchmarking and diagnosing deviations in performance of aggregated equipment that delivers a specific service to a building (e.g., space heating, lighting). The increasing installation of sensors and meters in buildings makes the evaluation of building performance at the system level more feasible through improved data collection. Leveraging this opportunity, this study introduces a set of system-level KPIs, which cover four major end-use systems in buildings: lighting, MELs (Miscellaneous Electric Loads, aka plug loads), HVAC (heating, ventilation, and air-conditioning), and SWH (service water heating), and their eleven subsystems. The system KPIs are formulated in a new context to represent various types of performance, including energy use, peak demand, load shape, occupant thermal comfort and visual comfort, ventilation, and water use. This paper also presents a database of system KPIs using the EnergyPlus simulation results of 16 USDOE prototype commercial building models across four vintages and five climate zones. These system KPIs, although originally developed for office buildings, can be applied to other building types with some adjustment or extension. Potential applications of system KPIs for system performance benchmarking and diagnostics, code compliance, and measurement and verification are discussed
The Eclipsing Scuti Star EPIC 245932119
We present the physical properties of EPIC 245932119 ( = 9.82)
exhibiting both eclipses and pulsations from the {\it K{\rm 2}} photometry. The
binary modeling indicates that the eclipsing system is in detached or
semi-detached configurations with a mass ratio of 0.283 or 0.245, respectively,
and that its light-curve parameters are almost unaffected by pulsations.
Multiple frequency analyses were performed for the light residuals in the
outside-primary eclipsing phase after subtracting the binarity effects from the
observed data. We detected 35 frequencies with signal to noise amplitude ratios
larger than 4.0 in two regions of 0.626.28 day and 19.3624.07
day. Among these, it is possible that some high signals close to the
Nyquist limit may be reflections of real pulsation frequencies
(2). All frequencies (, , , ,
, ) in the lower frequency region are orbital harmonics, and
three high frequencies (, , ) appear to be sidelobes
split from the main frequency of = 22.77503 day. Most of them are
thought to be alias effects caused by the orbital frequency. For the 26 other
frequencies, the pulsation periods and pulsation constants are in the ranges of
0.0410.052 days and 0.0130.016 days, respectively. These values and the
position in the Hertzsprung-Russell diagram reveal that the primary component
is a Sct pulsator. The observational properties of EPIC 245932119 are
in good agreement with those for eclipsing binaries with Sct-type
pulsating components.Comment: 17 pages, including 5 figures and 3 tables, accepted for publication
in A
Young tableaux and crystal for finite simple Lie algebras
We study the crystal base of the negative part of a quantum group. An
explicit realization of the crystal is given in terms of Young tableaux for
types , , , , and . Connection between our realization
and a previous realization of Cliff is also given
Neutrino Interactions In Color-Flavor-Locked Dense Matter
At high density, diquarks could condense in the vacuum with the QCD color
spontaneously broken. Based on the observation that the symmetry breaking
pattern involved in this phenomenon is essentially the same as that of the
Pati-Salam model with broken electroweak--color SU(3) group, we determine the
relevant electroweak interactions in the color-flavor locked (CFL) phase in
high density QCD. We briefly comment on the possible implications on the
cooling of neutron stars.Comment: 13 pages. LaTeX. Talk given at the First KIAS Workshop on
Astrophysics, Seoul, May 2000; V2. references added. comments on cooling
change
Characterization of Metastatic Tumor Formation by the Colony Size Distribution
Knowledge regarding the kinetics of metastatic tumor formation, as related to
the growth of the primary tumor, represents a fundamental issue in cancer
biology. Using an in vivo mammalian model, we show here that one can obtain
useful information from the frequency distribution of the sizes of metastatic
colonies in distant organs after serial sectioning and image reconstruction. To
explain the experimental findings, we constructed a biophysical model based on
the respective growth patterns of the primary tumor and metastases and a
stochastic process of metastatic colony formation. Heterogeneous distributions
of various biological parameters were considered. We found that the elementary
assumption of exponential forms of growth for the primary tumor and metastatic
colonies predicts a linear relation on a log-log plot of a metastatic colony
size distribution, which was consistent with the experimental results.
Furthermore, the slope of the curve signifies the ratio of growth rates of the
primary and the metastases. Non-exponential (Gompertzian and logistic) tumor
growth patterns were also incorporated into the theory to explain possible
deviation from the log-log linear relation. The observed metastasis-free
probability also supported the assumption of a time-dependent Poisson process.
With this approach, we determined the mechanistic parameters governing the
process of metastatogenesis in the lungs for two murine tumor cell lines (KHT
and MCaK). Since biological parameters specified in the model could be obtained
in the laboratory, a workable metastatic "assay" may be established for various
malignancies and in turn contribute in formulating rational treatment regimens
for subclinical metastases.Comment: 14 pages, 6 figure
Strong correlation effects in the doped Hubbard model in infinite dimensions
The density of states and the optical conductivity of the doped Hubbard model
on a Bethe lattice with infinite connectivities have been studied using an
analytic variant of the Lanczos continued fraction method. The spectral weight
of the gap states and the position of the chemical potential upon hole or
electron doping have been studied. We argue that the strong correlation effects
such as gap states and midinfrared band shown in two dimensions also appear in
infinite dimensions.Comment: 9 pages, revtex, 3 figures upon reques
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