Performance of Equal Phase-Shift Search for One Iteration

Grover presented the phase-shift search by replacing the selective inversions by selective phase shifts of $\pi /3$. In this paper, we investigate the phase-shift search with general equal phase shifts. We show that for small uncertainties, the failure probability of the Phase-$\pi /3$ search is smaller than the general phase-shift search and for large uncertainties, the success probability of the large phase-shift search is larger than the Phase-$\pi /3$ search. Therefore, the large phase-shift search is suitable for large-size of databases.Comment: 10 pages, 4 figure

Bulk Mediated Surface Diffusion: Non Markovian Desorption with Finite First Moment

Here we address a fundamental issue in surface physics: the dynamics of adsorbed molecules. We study this problem when the particle's desorption is characterized by a non Markovian process, while the particle's adsorption and its motion in the bulk are governed by a Markovian dynamics. We study the diffusion of particles in a semi-infinite cubic lattice, and focus on the effective diffusion process at the interface $z = 1$. We calculate analytically the conditional probability to find the particle on the $z=1$ plane as well as the surface dispersion as functions of time. The comparison of these results with Monte Carlo simulations show an excellent agreement.Comment: 16 pages, 7 figs. European Physical Journal B (in press

Faucet Water supplied in Joetsu-city

人口13万人都市の上越市の水道水は、その集水地域に耕作田をほとんど含まず、工場もなく、数戸の人家に限られた、きわめて恵まれた環境下で供給されていた。ここでは上越市の水道水に関連した合計80項目の水質検査のデーターを整理し、吟味した。城山浄水場と正善寺ダムの2系統からの水道水(浄水)は、平成4年公布の水質基準に適合した安全な水であった。水質基準項目に含まれるフェノール類と陰イオン界面活性剤の測定精度の問題点を指摘した。また快適水質項目に含まれ、痴呆と骨軟化症に関係するアルミニウムの測定回数を、今の年1回(城山浄水場)より多くして頂き、かつ測定精度を上げる必要性を提言した。厚生省の諮問機関である「おいしい水研究会」が発表した、おいしい水の要件に適合している我国の414市に、上越市の水道水は上げられていた。Joetsu city has 130,000 population. The municipal government has supplied the townspeople with the safe faucet water. The catchment area contains few rice fields or no factories. Only several people live in the area of an upper stream of river. The 80 items data of water quality test were studied. The faucet water from SIROYAMA and SYOZENJI is fit for the standard water quality. So it is safe. But there are two problems. One is the analytical accuracy of phenols and the anion surfactant which are in the items of the standard water quality. The other is the measurement frequency of aluminium which has a relationship to dementia and osteomalacia. It needs more than twice. The report of the society of reserch for delicious water, which belongs to the Ministry of Welfare, says that there are 414 cities supplying with delicious water in Japan. Joetsu city is one of them.departmental bulletin pape

Exact throughput capacity studies for mobile ad hoc networks

公立はこだて未来大学博士（システム情報科学）指導教員：姜　暁鴻doctoral thesi

Positron production in multiphoton light-by-light scattering

A signal of 106 {+-} 14 positrons above background has been observed in collisions of a low-emittance 46.6-GeV electron beam with terawatt pulses from a Nd:glass laser at 527 nm wavelength in an experiment at the Final Focus Test Beam at SLAC. Peak laser intensities of {approximately} 1.3 {times} 10{sup 18} W/cm{sup 2} have been achieved corresponding to a value of 0.3 for the parameter {Upsilon} = {var_epsilon}*/{var_epsilon}{sub crit} where {var_epsilon}* = 2{gamma}{var_epsilon}{sub lab} is the electric field strength of the laser transformed to the rest frame of the electron beam and {var_epsilon}{sub crit} = m{sup 2}c{sup 3}/e{bar h} = 1.3 {times} 10{sup 16} V/cm is the QED critical field strength. The positrons are interpreted as arising from a two-step process in which laser photons are backscattered to GeV energies by the electron beam followed by a collision between the high-energy photon and several laser photons to produce an electron-positron pair. These results are the first laboratory evidence for a light-by-light scattering process involving only real photons

On Saikaku's “Honcho-NijuFuko”.

19KJ00003572002論文Articledepartmental bulletin pape

Environmental and genotype-environment interaction effects on phenotypic variation for quantitative characters

application/pdfdepartmental bulletin pape

年報第4号刊行にあたって

専修大学社会知性開発研究センター/アジア産業研究センターの研究プロジェクト,文部科学省私立大学戦略的研究基盤形成支援事業「メコン諸国における経済統合の中小企業への影響についての研究 : 『ASEAN サプライチェーン』の観点から」(2014年度～2018年度)othe

Self adaptive island GA

Exploration efficiency of GAs largely depends on parameter values. But, it is hard to manually adjust these values. To cope with this problem, several adaptive GAs which automatically adjust parameters have been proposed. However, most of the existing adaptive GAs can adapt only a few parameters at the same time. Although several adaptive GAs can adapt multiple parameters simultaneously, these algorithms require extremely large computation costs. In this paper, we propose self adaptive island GA (SAIGA) which adapts four parameter values simultaneously while finding a solution to a problem. SAIGA is a kind of island GA, and it adapts parameter values using a similar mechanism to meta-GA. Throughout our evaluation experiments, we confirmed that our algorithm outperforms a simple GA using De Jong's rational parameters, and has performance close to a simple GA using manually tuned parameter values.conference pape

An Endorsement-Based Mobile Payment System for a Disaster Area

A payment system in a disaster area is essential for people to buy necessities such as groceries, clothing, and medical supplies. However, existing payment systems require the needed communication infrastructures (like wired networks and cellular networks) to enable transactions, so that these systems cannot be relied on in disaster areas, where these communication infrastructures may be destroyed. In this paper, we propose a mobile payment system, adopting infrastructure less mobile adhoc networks (MANETs), which allow users to shop in disaster areas while providing secure transactions. Specifically, we propose an endorsement-based scheme to guarantee each transaction and a scheme to provide monitoring based on location information, and thus achieve transaction validity and reliability. Our mobile payment system can also prevent collusion between two parties and reset and recover attacks by any user. Security is ensured by using location-based mutual monitoring by nearby users, avoiding thereby double spending in the system.conference pape