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Search Results: 1 - 10 of 856 matches for " Miura Yukitoshi "
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Modification to poloidal charge exchange recombination spectroscopy measurement in JT-60U tokamak
Ding Bo-Jiang,Sakamoto Yoshiteru,Miura Yukitoshi,

中国物理 B , 2007,
Abstract: With consideration of the effects of the atomic process and the sight line direction on the charge exchange re-combination spectroscopy (CXRS), a code used to modify the poloidal CXRS measurement on Tokamak-60 Upgrade (JT-60U) in Japan Atomic Energy Research Institute is developed, offering an effective tool to modify the measurement and analyse experimental results further. The results show that the poloidal velocity of ion is overestimated but the ion temperature is underestimated by the poloidal CXRS measurement, and they also indicate that the effect of observation angle on rotation velocity is a dominant one in a core region (r/a 〈 0.65), whereas in an edge region where the sight line is nearly normal to the neutral beam, the observation angle effect is very small. The difference between the modified velocity and the neoclassical velocity is not larger than the error in measurement. The difference inside the internal transport barrier (ITB) region is 2-3 times larger than that outside the ITB region, and it increases when the effect of excited components in neutral beam is taken into account. The radial electric field profile is affected greatly by the poloidal rotation term, which possibly indicates the correlation between the poloidal rotation and the transport barrier formation.第一段]
Solvability of the Economic Input-Output Equation by Time Irreversibility  [PDF]
Shinji Miura
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2014, DOI: 10.4236/alamt.2014.43013
This paper reinterprets the economic input-output equation as a description of a realized situation without considering decision making. This paper uses the equation that the self-sufficiency rate is added to the Leontief type, and discusses its solvability. The equation has a unique solution if and only if each part of the relevant society satisfies the space-time openness condition. This condition means that commodities which a part of the relevant society possesses are not all inputted to its inside. Moreover, if the process of input and output is time irreversible, each part of the relevant society satisfies the space-time openness condition. Therefore, the solvability of the equation is guaranteed by time irreversibility. This proposition seems to be relevant to the grandfather paradox which is a type of time paradox.
Non-Singularity Conditions for Two Z-Matrix Types  [PDF]
Shinji Miura
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2014, DOI: 10.4236/alamt.2014.42009
A real square matrix whose non-diagonal elements are non-positive is called a Z-matrix. This paper shows a necessary and sufficient condition for non-singularity of two types of Z-matrices. The first is for the Z-matrix whose row sums are all non-negative. The non-singularity condition for this matrix is that at least one positive row sum exists in any principal submatrix of the matrix. The second is for the Z-matrix \"\"which satisfies \"\"where \"\" . Let \"\" be the ith row and the jth column element of \"\", and \"\" be the jth element of \"\". Let \"\"be a subset of \"\"which is not empty, and \"\" be the complement of \"\" if \"\" is a proper subset. The non-singularity condition for this matrix is \"\"such that \"\"or \"\"such that \"\" for \"\" . Robert Beauwens and Michael Neumann previously presented conditions similar to these conditions. In this paper, we present a different proof and show that these conditions can be also derived from theirs.
Money Circulation Equation Considering Time Irreversibility  [PDF]
Shinji Miura
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2014, DOI: 10.4236/alamt.2014.44016
Abstract: The essence of money circulation is that money continues to transfer among economic agents eternally. Based on this recognition, this paper shows a money circulation equation that calculates the quantities of expenditure, revenue, and the end money from the quantity of the beginning money. The beginning money consists of the possession at term beginning, production and being transferred from the outside of the relevant society. The end money consists of the possession at term end, disappearance and transferring to the outside of the relevant society. This equation has a unique solution if and only if each part of the relevant society satisfies the space-time openness condition. Moreover, if money is transferred time irreversibly, each part of the relevant society satisfies the space-time openness condition. Hence, the solvability of the equation is guaranteed by time irreversibility. These solvability conditions are similar to those of the economic input-output equation, but the details are different. An equation resembling our money circulation equation was already shown by Mária Augustinovics, a Hungarian economist. This paper examines the commonalities and differences between our equation and hers. This paper provides the basis for some intended papers by the author.
Quantification of Revenue Induction and Expenditure Reflux in a Monetary Economy  [PDF]
Shinji Miura
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2015, DOI: 10.4236/alamt.2015.51003
Abstract: In a monetary economy, expenditure induces revenue for each agent. We call this the revenue induction phenomenon. Moreover, in a special case, part of the expenditure by an agent returns as their own revenue. We call this the expenditure reflux phenomenon. Although the existence of these phenomena is known from the olden days, this paper aims to achieve a more precise quantification of them. We first derive the revenue induction formula through solving the partial money circulation equation. Then, for a special case, we derive the expenditure reflux formula. Furthermore, this paper defines the revenue induction coefficient and the expenditure reflux coefficient, which are the key concepts for understanding the two formulas, and examines their range.
Monetary Budget Constraint and Its Missing Problems  [PDF]
Shinji Miura
Open Journal of Optimization (OJOp) , 2015, DOI: 10.4236/ojop.2015.43011
Abstract: This paper aims to inquire into an objectively authentic budget constraint in a monetary economy through showing two missing problems of the monetary budget constraint and their solutions. To start with, we show the first missing problem that money is “missing” if all agents expend their total budgets under the simple budget constraint. This problem shows that the simple budget constraint is inadequate as an objective monetary budget constraint. A deficiency of the simple budget constraint exists partly in that it does not reflect money circulation. To improve this deficiency, we incorporate the expenditure reflux formula into the simple constraint. The first missing problem is partially solved by the application of this reflux budget constraint, but another problem occurs. The new problem is that infinite expenditure is permitted under this constraint. This is the second missing problem. The second problem appears to be a variation of the solvability problem of the money circulation equation. Referring to the proof of the solvability, we incorporate a time irreversible disposal into the budget constraint. This irreversibility budget constraint brings us a provisional solution of the missing problems. However, it should not be called a perfect solution. We also examine the relationships between our research and two previous studies: the finance constraint and the cash-in-advance model.
Layer-Wise Topology Design for Cost Effective IP-Optical Networks  [PDF]
Masashi Hashimoto, Kota Miura
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.41012
Abstract: Traffic engineering and topology design considering multilayer configuration have become more important. While multilayer design studies usually discuss the traffic engineering issue or reliability, this paper focuses on network construction cost in studying multilayer topology design. The number of ports for the IP layer and the maximum number of Wavelength Division Multiplexers (WDM) for the optical layer are used as construction cost factors. Given a traffic matrix for the IP layer, 1) the number of ports is minimized to obtain a topology and a traffic matrix for the optical link, and 2) the maximum number of WDMs is minimized to configure the optical layer topology. It is shown that both the IP and Optical path layers have been given economic topologies. We present LP formulations of this scheme and the results of a simulation of the full-mesh traffic of 5 nodes, which shows that both layers are successfully optimized.
Stereoselective Aldol Reaction in Aqueous Solution Using Prolinamido-Glycosides as Water-Compatible Organocatalyst  [PDF]
Daisuke Miura, Tomoya Machinami
Modern Research in Catalysis (MRC) , 2015, DOI: 10.4236/mrc.2015.41003
Abstract: Prolinamido-glycoside catalyzed asymmetric aldol reaction in aqueous media is reported. The reactions are rapid and highly stereoselective when water is used as solvent. The stereoselectivities were under influence of configurations of a prolyl residue of the catalyst and α-chiral aldehydes. Water soluble prolinamido-glycoside catalysts are easily separable from reaction mixture and can be recycled and re-used several times.
The Revelation Effect Occurs Whether or Not Working Memory Is Occupied  [PDF]
Hiroshi Miura, Yuji Itoh
Psychology (PSYCH) , 2018, DOI: 10.4236/psych.2018.92013
Abstract: The revelation effect is a phenomenon wherein performing a cognitive task before a recognition judgment induces “old” responses. One of the theories for the occurrence mechanism of the revelation effect is the criterion shift account (Niewiadomski & Hockley, 2001). This account explains that because working memory is occupied when people solve a cognitive task, they adopt a more liberal criterion for recognition judgments immediately after a cognitive task than those with no preceding cognitive task. However, no studies of the revelation effect in which manipulation of working memory was intended have been conducted. We examined whether working memory load and capacity are related to the revelation effect. The results showed that neither the occurrence of the revelation effect nor its degree was affected by working memory load or capacity. As the results suggest working memory is not related to the revelation effect, a partially or entirely alternative account that can explain the revelation effect is needed.
Superfluid-Insulator Transition of Interacting Multi-Component Bosons
Yukitoshi Motome,Masatoshi Imada
Physics , 1996,
Abstract: Various types of superfluid-insulator transitions are investigated for two-component lattice boson systems in two dimensions with on-site hard-core repulsion and the component-dependent intersite interaction. The mean-field phase diagram is obtained by the Gutzwiller-type variational technique in the plane of filling and interaction parameters. Various ground-state properties are also studied by the quantum Monte Carlo method. Our model exhibits two types of diagonal long-range orders; the density order around the density $n=1/2$ and the Ising-type component order near $n=1$. The quantum Monte Carlo results for the transitions from the superfluid state to these two ordered states show marked contrast with the Gutzwiller results. Namely, although they are both accompanied by phase separation into commensurate ($n=1/2$ or $n=1$) and incommensurate density phases, these transitions are both continuous. The continuous growth of the component correlation severely suppresses the superfluidity as well as the inverse of the effective mass in the critical region of the component order transition in contrast to the persistence of the superfluidity in the density-ordered state. We propose a mechanism of the mass enhancement observed even far from the Mott insulating filling $n=1$, when the Ising-type component order persists into $n \neq 1$. Possible relevance of this type of mass enhancement in other systems is also discussed.
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