16,139 research outputs found
Microwave burst with fine spectral structures in a solar flare on 2011 August 9
On August 9, 2011, there was an X6.9 flare event occurred near the west limb
of solar disk. From the observation obtained by the spectrometer of the Chinese
Solar Broadband Radio Spectrometer in Huairou (SBRS/Huairou) around the flare,
we find that this powerful flare has only a short-duration microwave burst of
about only 5 minutes, and during the short-duration microwave burst, there are
several kinds of fine structures on the spectrogram. These fine structures
include very short-period pulsations, millisecond spike bursts, and type III
bursts. The most interesting is that almost all of the pulses of very
short-period pulsation (VSP) are structured by clusters of millisecond
timescales of spike bursts or type III bursts. And there exists three different
kinds of frequency drift rates in the VSP: the frequency drift rates with
absolute value of about 55 - 130 MHz s^{-1} in the pulse groups, the frequency
drift rates with absolute value of about 2.91 - 16.9 GHz s^{-1} on each
individual pulse, and the frequency drift rates with absolute value of about 15
- 25 GHz s) at each individual spike burst or type III burst.Comment: 5 pages, 3 figure
ANALYSIS OF HOUSEWIVES' GROCERY SHOPPING BEHAVIOR IN TAIWAN: AN APPLICATION OF THE POISSON SWITCHING REGRESSION
The purpose of this study is to empirically investigate Taiwanese married women's grocery shopping behavior in relation to their labor force participation status. In this study, focus is limited to their grocery shopping frequency which is meant to be a proxy for an input to household production, i.e., food at home. A Poisson switching regression model is developed to estimate parameters of married women's shopping behavior. The results show that the labor force participation status does have a great impact on time allocation behavior.Household production, Labor supply rationing, Poisson switching regression, Shopping frequency, Time allocation, Consumer/Household Economics,
Intermixing of InGaAs/GaAs quantum wells and quantum dots using sputter-deposited silicon oxynitride capping layers
Various approaches can be used to selectively control the amount of intermixing in III-Vquantum well and quantum dotstructures. Impurity-free vacancy disordering is one technique that is favored for its simplicity, however this mechanism is sensitive to many experimental parameters. In this study, a series of silicon oxynitride capping layers have been used in the intermixing of InGaAs/GaAs quantum well and quantum dotstructures. These thin films were deposited by sputter deposition in order to minimize the incorporation of hydrogen, which has been reported to influence impurity-free vacancy disordering. The degree of intermixing was probed by photoluminescence spectroscopy and this is discussed with respect to the properties of the SiOxNyfilms. This work was also designed to monitor any additional intermixing that might be attributed to the sputtering process. In addition, the high-temperature stress is known to affect the group-III vacancy concentration, which is central to the intermixing process. This stress was directly measured and the experimental values are compared with an elastic-deformation model.This work has been made possible with access to the
ACT Node of the Australian National Fabrication Facility and
through the financial support of the Australian Research
Council
Style Transfer in Text: Exploration and Evaluation
Style transfer is an important problem in natural language processing (NLP).
However, the progress in language style transfer is lagged behind other
domains, such as computer vision, mainly because of the lack of parallel data
and principle evaluation metrics. In this paper, we propose to learn style
transfer with non-parallel data. We explore two models to achieve this goal,
and the key idea behind the proposed models is to learn separate content
representations and style representations using adversarial networks. We also
propose novel evaluation metrics which measure two aspects of style transfer:
transfer strength and content preservation. We access our models and the
evaluation metrics on two tasks: paper-news title transfer, and
positive-negative review transfer. Results show that the proposed content
preservation metric is highly correlate to human judgments, and the proposed
models are able to generate sentences with higher style transfer strength and
similar content preservation score comparing to auto-encoder.Comment: To appear in AAAI-1
APPLICATION OF COGNITIVE PSYCHOLOGY IN THE TEACHING REFORM OF ENVIRONMENTAL ART DESIGN AND THE CULTIVATION OF CREATIVE THINKING ABILITY
ACREAGE PLANTING DECISION ANALYSIS OF SOUTH CAROLINA TOMATOES: NERLOVIAN VERSUS JUST RISK MODEL
Factors which explain supply response behavior of South Carolina tomato growers were determined. Two well known supply response models were used for comparison: the Nerlovian structural model and the Just risk model. The Just risk model reflected the significance of the risk effect in both stable and unstable periods. An evaluation of forecasting power between the two models was indeterminate. Growers are apparently willing to invest in more information with increased market instability because growers were influenced by the Florida winter price of tomatoes in planting decisions during the period of instability.Crop Production/Industries,
- …