410 research outputs found
A critical review of health services in Japan
Japan was the first Asian country to introduce social insurance measures and it has expanded them during the last few decades. The first social insurance law was passed in 1922, dealing with worker's health
insurance, and it was followed by the National Health Insurance in 1938, Seamen's Insurance in 1939, and Employees' Pension Insurance in 1921. However, these were seldom widely available in actual practice because of the characteristics of public assistance which limited them to the poor.</p
Polynomial time primality testing algorithm
In August 2002, three Indian researchers, Manindra Agrawal and his students Neeraj Kayal and Nitin Saxena at the Indian Institute of Technology in Kanpur, presented a remarkable algorithm (the AKS algorithm) in their paper PRIMES is in P. It is a deterministic polynomial-time algorithm that determines whether an input number is prime or composite. No such algorithm was known so far and it has fundamental meaning for complexity theory. This project is centered around the AKS algorithm from the PRIMES is in P paper. The objectives are both experiments with the AKS algorithm and theorems and lemmas showing the correctness of the algorithm. One of the tasks of the project is to provide easy-to-follow explanations of the original paper for average mathematically mature readers. We also analyze the AKS algorithm in detail. Ideas and concepts in the algorithm are studied and possibilities of improvements of the algorithm are explored
Exploring walking behavior in SU(3) gauge theory with 4 and 8 HISQ quarks
We present the report of the LatKMI collaboration on the lattice QCD
simulation for the cases of 4 and 8 flavors. The Nf=8 in particular is
interesting from the model-building point of view: The typical walking
technicolor model with the large anomalous dimension is the so-called
one-family model (Farhi-Susskind model). Thus we explore the walking behavior
in LQCD with 8 HISQ quarks by comparing with the 4-flavor case (in which the
chiral symmetry is spontaneously broken). We report preliminary results on the
spectrum, analyzed through the chiral perturbation theory and the finite-size
hyperscaling, and we discuss the availability of the Nf=8 QCD to the
phenomenology.Comment: 7 pages, Proceedings of 30th International Symposium on Lattice Field
Theory, June 24-29, 2012, Cairns, Australi
The scalar spectrum of many-flavour QCD
The LatKMI collaboration is studying systematically the dynamical properties
of N_f = 4,8,12,16 SU(3) gauge theories using lattice simulations with (HISQ)
staggered fermions. Exploring the spectrum of many-flavour QCD, and its scaling
near the chiral limit, is mandatory in order to establish if one of these
models realises the Walking Technicolor scenario. Although lattice technologies
to study the mesonic spectrum are well developed, scalar flavour-singlet states
still require extra effort to be determined. In addition, gluonic observables
usually require large-statistic simulations and powerful noise-reduction
techniques. In the following, we present useful spectroscopic methods to
investigate scalar glueballs and scalar flavour-singlet mesons, together with
the current status of the scalar spectrum in N_f = 12 QCD from the LatKMI
collaboration.Comment: 9 pages, 5 figures, 1 table. To appear in the Proceedings of SCGT 12,
KMI, Nagoya University, Dec. 4-7, 201
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