1,112 research outputs found
Information criteria for impulse response function matching estimation of DSGE models
No full textWe propose a new information criterion for impulse response function matching estimators of the structural parameters of macroeconomic models. The main advantage of our procedure is that it allows the researcher to select the impulse responses that are most informative about the deep parameters, therefore reducing the bias and improving the efficiency of the estimates of the model’s parameters. We show that our method substantially changes key parameter estimates of representative dynamic stochastic general equilibrium models, thus reconciling their empirical results with the existing literature. Our criterion is general enough to apply to impulse responses estimated by vector autoregressions, local projections, and simulation methods.
Position sensitive, continuous wavelength tunable laser based on photopolymerizable cholesteric liquid crystals with an in-plane helix alignment
No full textThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Hiroyuki Yoshidaa, Yo Inoue, Takuya Isomura, Yuko Matsuhisa, Akihiko Fujii, and Masanori Ozaki, Appl. Phys. Lett. 94, 093306 (2009) and may be found at https://doi.org/10.1063/1.3089846.Position sensitive lasing with continuous wavelength tunability and emission in the cell-plane direction is demonstrated from a photopolymerized cholesteric liquid crystal film. The device has a gradually dilating helix lying in the cell-plane direction and is fabricated by applying a vertical electric field in a conventionally rubbed wedge cell while cooling the sample from the isotropic phase. Tuning range of ~ 100 nm is achieved by translating the device with respect to the pump beam. Photopolymerizable materials are especially useful in this configuration since a freestanding film, not requiring any external voltage to maintain the molecular ordering, can be prepared
Capacitors
No full textThis webpage is part of a larger site by the author about electronic circuit engineering. This page introduces the reader to capacitors, including the principles behind how they work. Explanations of several different types of capacitors (including Electrolytic, Tantalum, and Mica) are accompanied by detailed color illustrations of the concepts
センジョウ クッキョクセイ コウブンシ ノ ダイ2 オヨビ ダイ3 ビリアル ケイスウ
No full textYo Nakamura, Takashi Norisuye, and Akio Teramoto. Macromolecules 24 (17), 4904-4908. August 1, 1991. © 1991 American Chemical Society. https://doi.org/10.1021/ma00017a029.Yo Nakamura, Kazutomo Akasaka, Kenichi Katayama, Takashi Norisuye, and Akio Teramoto. Macromolecules 25 (3), 1134-1138. February 1, 1992. © 1992 American Chemical Society. https://doi.org/10.1021/ma00029a020.Norisuye, T., & Nakamura, Y. (1993). Remarks on smoothed-density theories for flexible chains with three-segment interactions. In Polymer (Vol. 34, Issue 7, pp. 1440–1443). Elsevier BV. https://doi.org/10.1016/0032-3861(93)90858-8.Yo Nakamura, Norisuke Inoue, Takashi Norisuye, and Akio Teramoto. Macromolecules 30 (3), 631-636. February 10, 1997. © 1997 American Chemical Society. https://doi.org/10.1021/ma961222d
SECOND AND THIRD VIRIAL COEFFICIENTS FOR LINEAR FLEXIBLE POLYMERS
No full textYo Nakamura, Takashi Norisuye, and Akio Teramoto. Macromolecules 24 (17), 4904-4908. August 1, 1991. © 1991 American Chemical Society. https://doi.org/10.1021/ma00017a029.Yo Nakamura, Kazutomo Akasaka, Kenichi Katayama, Takashi Norisuye, and Akio Teramoto. Macromolecules 25 (3), 1134-1138. February 1, 1992. © 1992 American Chemical Society. https://doi.org/10.1021/ma00029a020.Norisuye, T., & Nakamura, Y. (1993). Remarks on smoothed-density theories for flexible chains with three-segment interactions. In Polymer (Vol. 34, Issue 7, pp. 1440–1443). Elsevier BV. https://doi.org/10.1016/0032-3861(93)90858-8.Yo Nakamura, Norisuke Inoue, Takashi Norisuye, and Akio Teramoto. Macromolecules 30 (3), 631-636. February 10, 1997. © 1997 American Chemical Society. https://doi.org/10.1021/ma961222d
Lecideoid lichens of Prince Olav Coast and Soya Coast, Enderby Land, East Antarctica
No full textFive species of lecideoid lichens belonging to three genera are reported as new to the flora of the Prince Olav Coast and the Soya Coast, Enderby Land, East Antarctica; they are Carbonea capsulata (DODGE & BAKER) HALE, Lecidea andersonii R. FILSON, Lecidea cancriformis DODGE & BAKER, Lecidea soyaensis M. INOUE and Lecidella siplei (DODGE & BAKER) M. INOUE. All are endemic to Antarctica. An examination was made of the collections from the region, which were collected mainly by the author under the project of the 27th Japanese Antarctic Research Expedition (JARE-27,during January 1986 and February 1987). The type and authentic specimens of possibly related species have been restudied. Lecidea soyaensis M. INOUE is new to science and Lecidella siplei (DODGE & BAKER) M. INOUE is proposed as a new combination. Taxonomic and chemical data as well as a key to the known taxa are provided
The Hobby of Electronic Circuit Engineering
No full textThis website (originally created in Japanese and translated into English using translation software) by a Japanese systems engineer, Seiichi Inoue, provides an extensive overview of electronic circuit engineering. Topics covered include: Basic knowledge of Electronic parts, Basic knowledge of Engineering Instruments, an Introduction of Engineering Method, and the Assembly Process. A variety of electronic circuits and their uses are provided, as well as a separate section on PIC electronic circuits. The language may be difficult to follow at times given the translation, but still a gem of a site for anyone wanting to build some circuits! Keep in mind that in some sections, the author notes that he is "describing while studying, there seems to be mistakes in the contents. Do at your own risk." For some further browsing, he includes sections on his other interests, such as 3D photography, java programming, CAD, Japanese customs and the Japanese language
Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer
No full textThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Hiroyuki Yoshida, Yusuke Shiozaki, Yo Inoue, Masaya Takahashi, Yasuhiro Ogawa, Akihiko Fujii, and Masanori Ozaki, Journal of Applied Physics 113, 203105 (2013) and may be found at https://doi.org/10.1063/1.4807402.We propose a device structure to lower the lasing threshold of a uniformly lying helix cholesteric liquid crystal (ChLC) laser. We place a p-conjugated polymer active layer beneath the ChLC layer to provide auxiliary gain, and demonstrate an improvement in the lasing threshold by a factor of 2.3. We also perform finite difference time domain calculations coupled with rate equations for a four-level system, and clarify the effect of the additional active layer on both the photonic density of states and the inversion population density. Although the addition of an extra layer lowers the photonic density of states, the gain provided by the auxiliary layer is sufficient to overcome the losses and decrease the lasing threshold. Our concept is useful for obtaining high-performance ChLC lasers
Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser
No full textSPIE Photonic Devices + Applications, 2011, San Diego, California, United StatesYo Inoue, Hiroyuki Yoshida, Kenta Inoue, Yusuke Shiozaki, Hitoshi Kubo, Akihiko Fujii, and Masanori Ozaki "Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser", Proc. SPIE 8114, Liquid Crystals XV, 811415 (7 September 2011). DOI: https://doi.org/10.1117/12.893208We report tunable single-mode lasing with an improved slope efficiency from a cholesteric liquid crystal (ChLC) cavity with a three-layered structure. The device consists of one photopolymerized ChLC layer with a wide reflection band, another ChLC layer with a notch reflection band and a Rhodamine-6G-doped ionic liquid layer acting as the gain medium. Single-mode lasing can be obtained in this device structure because the ChLC layer with the notch reflection band strongly reflects only one of the Fabry-Perot cavity modes. Tuning of the lasing wavelength is achieved by tuning the reflection band of the notch ChLC. The device showed a maximum slope efficiency of 16%, which was found to be approximately 1.5 times larger than that of ordinary ChLC lasers doped with the pyrromethene 597 laser dye
The distribution of first-passage times and durations in FOREX and future markets
No full textPossible distributions are discussed for intertrade durations and first-passage processes in financial markets. The view-point of renewal theory is assumed. In order to represent market data with relatively long durations, two types of distributions are used, namely a distribution derived from the Mittag Leffler survival function and the Weibull distribution. For the Mittag-Leffler type distribution, the average waiting time (residual life time) is strongly dependent on the choice of a cut-off parameter tmax, whereas the results based on the Weibull distribution do not depend on such a cut-off. Therefore, a Weibull distribution is more convenient than a Mittag Leffler type if one wishes to evaluate relevant statistics such as average waiting time in financial markets with long durations. On the other hand, we find that the Gini index is rather independent of the cut-off parameter. Based on the above considerations, we propose a good candidate for describing the distribution of first-passage time in a market: The Weibull distribution with a power-law tail. This distribution compensates the gap between theoretical and empirical results more efficiently than a simple Weibull distribution. It should be stressed that a Weibull distribution with a power-law tail is more flexible than the Mittag Leffler distribution, which itself can be approximated by a Weibull distribution and a power-law. Indeed, the key point is that in the former case there is freedom of choice for the exponent of the power-law attached to the Weibull distribution, which can exceed 1 in order to reproduce decays faster than possible with a Mittag Leffler distribution. We also give a useful formula to determine an optimal crossover point minimizing the difference between the empirical average waiting time and the one predicted from renewal theory. Moreover, we discuss the limitation of our distributions by applying our distribution to the analysis of the BTP future and calculating the average waiting time. We find that our distribution is applicable as long as durations follow a Weibull law for short times and do not have too heavy a tail
- …
