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Search Results: 1 - 10 of 989 matches for " Shinsuke Miyazaki "
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Reyn Nakamoto,Shinsuke Nakajima,Jun Miyazaki,Shunsuke Uemura
IAENG International Journal of Computer Science , 2007,
A Comment on Reis  [PDF]
Kenji Miyazaki
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.13019
Abstract: This note gives a counterexample on Reis [1]. Using a certain family of utility functions, this note not only gives a sharper representation than that of Reis but also demonstrates that interest rate inelastic money demand does not lead to superneutrality. This implies that superneutrality does not exist when uncerinty is introduced.
Incentives in Public and Privatized Firms under Incomplete Contracting Situations  [PDF]
Takeshi Miyazaki
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.23059
Abstract: It is argued that incentives for employees in the public service agencies will necessarily be weak because of the multiple dimensions of products, multiple principals, incomplete contract, and socializing. Some empirical studies refer to incomplete contracting situations as part of the cause of the diminishing of the public sector. This work investigates the effects of privatization and ownership shares on incentive schemes for employees who work for public or privatized firms under incomplete contracting situations. Two main results are obtained. First, the incentive intensity of public firms decreases as the government has more ownership shares, and the social benefit declines. Second, privatized firms offer their employees higher-powered incentive contracts than do public firms.
Exchange Rate and Current Account Dynamics with Habits over Consumption and Money Holdings  [PDF]
Ichiro Gombi, Shinsuke Ikeda
Modern Economy (ME) , 2013, DOI: 10.4236/me.2013.47051

Incorporating two independent habits over consumption and money holdings into a small country model, we examine the adjustment dynamics of the current account and the exchange rate to expansionary monetary and fiscal shocks under two alternative policy regimes: (1) the endogenous income transfer regime; and (2) the endogenous fiscal spending regime. In response to the shocks under regime (1), the exchange rate depreciates on impact and in the long run whereas it appreciates (depreciates) in transition if preferences for real money balances exhibit distant (adjacent) complementarity. Under regime (2), the consumption habits and the monetary habits jointly generate possibly non-monotonic current account dynamics. An induced increase in fiscal spending in regime (2) can generate a current account surplus in the case where the monetary habits exhibit strong distant complementarity.

Lack of Dopaminergic Inputs Elongates the Primary Cilia of Striatal Neurons
Ko Miyoshi, Kyosuke Kasahara, Shinki Murakami, Mika Takeshima, Natsuko Kumamoto, Asako Sato, Ikuko Miyazaki, Shinsuke Matsuzaki, Toshikuni Sasaoka, Taiichi Katayama, Masato Asanuma
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0097918
Abstract: In the rodent brain, certain G protein-coupled receptors and adenylyl cyclase type 3 are known to localize to the neuronal primary cilium, a primitive sensory organelle protruding singly from almost all neurons. A recent chemical screening study demonstrated that many compounds targeting dopamine receptors regulate the assembly of Chlamydomonas reinhardtii flagella, structures which are analogous to vertebrate cilia. Here we investigated the effects of dopaminergic inputs loss on the architecture of neuronal primary cilia in the rodent striatum, a brain region that receives major dopaminergic projections from the midbrain. We first analyzed the lengths of neuronal cilia in the dorsolateral striatum of hemi-parkinsonian rats with unilateral lesions of the nigrostriatal dopamine pathway. In these rats, the striatal neuronal cilia were significantly longer on the lesioned side than on the non-lesioned side. In mice, the repeated injection of reserpine, a dopamine-depleting agent, elongated neuronal cilia in the striatum. The combined administration of agonists for dopamine receptor type 2 (D2) with reserpine attenuated the elongation of striatal neuronal cilia. Repeated treatment with an antagonist of D2, but not of dopamine receptor type 1 (D1), elongated the striatal neuronal cilia. In addition, D2-null mice displayed longer neuronal cilia in the striatum compared to wild-type controls. Reserpine treatment elongated the striatal neuronal cilia in D1-null mice but not in D2-null mice. Repeated treatment with a D2 agonist suppressed the elongation of striatal neuronal cilia on the lesioned side of hemi-parkinsonian rats. These results suggest that the elongation of striatal neuronal cilia following the lack of dopaminergic inputs is attributable to the absence of dopaminergic transmission via D2 receptors. Our results provide the first evidence that the length of neuronal cilia can be modified by the lack of a neurotransmitter's input.
The Sustainability of Japan’s Government Debt: A Review  [PDF]
Tomomi Miyazaki, Kazuki Onji
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.76110
Abstract: This paper reviews the literature on the sustainability of Japanese government debt/deficit. First, we offer an overview of the approaches and the key findings on the sustainability analysis. Second, we introduce the arguments of Hoshi and Ito [1], which they predict that foreign investors’ share of JGBs could exceed beyond domestic ownership. Finally, we discuss the coordination problem in the JGB market based on the findings of Onji et al. [2] that examine how government withdrawal from the JGBs could roil the market.
Otolith features and growth of juvenile Opsaridium microcephalum (Pisces: Cyprinidae) from the southwestern shoreline of Lake Malawi
Shinsuke Morioka
African Zoology , 2011,
Abstract: Sanjika,Opsaridium microcephalum, were collected from two sites (Nkhotakota and Chia) along the southwestern shoreline of Lake Malawi. The sagitta of the otolith was arrowheadshaped with an obvious nucleus. Increments in the sagittae were observable until the bases of the rostra but invisible in the rostra. The asteriscus was oval-shaped with an ambiguous nucleus, leading to difficulty in identifying the first increment. The lapillus was ‘a’-shaped with an obvious nucleus and increments were observable from the nucleus to the margin. The lapillus was therefore considered the most suitable structure for interpreting daily growth increments in this species. The estimated hatching months of fish based on lapilli increment counts were from November to July, suggesting that this species has a long breeding period of at least eight months per year. The growth rate of fish born in the rainy season (0.74mmTL per day) was higher than those in the dry season (0.56mmTL per day). This growth difference was considered to be due to the difference in water temperature in the lake.
Postdiction: its implications on visual awareness, hindsight, and sense of agency
Shinsuke Shimojo
Frontiers in Psychology , 2014, DOI: 10.3389/fpsyg.2014.00196
Abstract: There are a few postdictive perceptual phenomena known, in which a stimulus presented later seems causally to affect the percept of another stimulus presented earlier. While backward masking provides a classical example, the flash lag effect stimulates theorists with a variety of intriguing findings. The TMS-triggered scotoma together with “backward filling-in” of it offer a unique neuroscientific case. Findings suggest that various visual attributes are reorganized in a postdictive fashion to be consistent with each other, or to be consistent in a causality framework. In terms of the underlying mechanisms, four prototypical models have been considered: the “catch up,” the “reentry,” the “different pathway” and the “memory revision” models. By extending the list of postdictive phenomena to memory, sensory-motor and higher-level cognition, one may note that such a postdictive reconstruction may be a general principle of neural computation, ranging from milliseconds to months in a time scale, from local neuronal interactions to long-range connectivity, in the complex brain. The operational definition of the “postdictive phenomenon” can be applicable to such a wide range of sensory/cognitive effects across a wide range of time scale, even though the underlying neural mechanisms may vary across them. This has significant implications in interpreting “free will” and “sense of agency” in functional, psychophysical and neuroscientific terms.
Scaling Violation in O(N) Vector Models
Shinsuke Nishigaki
Physics , 1993, DOI: 10.1142/S0217732394003865
Abstract: We investigate $O(N)$-symmetric vector field theories in the double scaling limit. Our model describes branched polymeric systems in $D$ dimensions, whose multicritical series interpolates between the Cayley tree and the ordinary random walk. We give explicit forms of residual divergences in the free energy, analogous to those observed in the strings in one dimension.
Solution of the genaralized periodic discrete Toda equation
Shinsuke Iwao
Physics , 2007, DOI: 10.1088/1751-8113/41/11/115201
Abstract: A box-ball system with more than one kind of balls is obtained by the generalized periodic discrete Toda equation (pd Toda eq.). We study the pd Toda equation in view of algebraic geometry. The time evolution of pd Toda eq. is linearized on an algebraic variety, and theta function solutions are obtained.
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