272 research outputs found
ANALYSIS OF SETAGAYA WARD'S SYSTEM OF DEVELOPING VACANT HOUSES INTO BASES THAT ARE USEFUL TO THE COMMUNITY
Setagaya Ward established a consultation service in July 2013 to develop vacant houses into useful bases for the community. This service matches owners of vacant houses with non-profit organizations and produced 22 bases in 10 years. Through analysis of the bases, it became clear that the majority of the bases were using vacant rooms rather than the entire house. Many bases that contribute to social welfare, such as child and disability welfare, have been created. This service can deal with cases that are difficult for private real estate companies to handle. It shows the significance for local governments to operate vacant house utilization system
ANALYSIS ON SUPPORT PROGRAM WITH CONVERSION FROM VACANT HOUSES INTO COMMUNITY BASES: A CASE IN SETAGAYA WARD, TOKYO
The municipal government of Setagaya Ward established a consultation program for individual owners of vacant houses in July 2013 to convert them into useful places for the community. This service aims to match with owners of vacant houses and citizen groups such as non-profit organizations and has established 22 bases for the community in 10 years. The authors found that the majority of them are used for social welfare offering places for children, disabilities, or the elderly. These facts indicate the necessity of the role of the public sector’s program rather than private companies to promote the re-utilization of vacant houses into places of inclusionary use for the community
Moduli trapping mechanism in modular flavor symmetric models
We discuss how the moduli in modular flavor symmetric models dynamically
select enhanced symmetry points at which the residual modular symmetry renders
extra matter fields massless. The moduli dynamics non-perturbatively produces
the extra matter particles, which gives (time-dependent) effective potential
that traps the moduli to enhanced symmetry points. We show analytic estimates
of particle production rate consistent with numerical results, and the dynamics
of moduli based on the analytic estimates.Comment: 35 pages, 14 figure
Dynamics of Superconformal Axion: Quality and Scalegenesis
We explore a dynamical mechanism to realize the emergence of a global
symmetry and its spontaneous breaking at an intermediate scale
for an axion solution to the strong CP problem. Such a dynamics is provided by
a new supersymmetric QCD near the middle of conformal window that couples to
fields spontaneously breaking the symmetry. A large anomalous
dimension of the breaking fields leads to the suppression of
explicit -violating higher dimensional operators. The breaking vacuum is generated at a scale hierarchically smaller than the
Planck scale by a non-perturbative effect. The breaking drives
the conformal breaking, and all the new quarks become massive. The axion
potential is generated by the ordinary color effect as the symmetry is only anomalous under the . The saxion direction is
stabilized by supersymmetry breaking and cosmologically harmless.Comment: 8 pages, 3 figure
Duality in ABE: Converting Attribute Based Encryption for Dual Predicate and Dual Policy via Computational Encodings
We show a generic conversion that converts an attribute based encryption (ABE) scheme for arbitrary predicate into an ABE scheme for its dual predicate. In particular, it can convert key-policy ABE (KP-ABE) into ciphertext-policy ABE (CP-ABE), and vice versa, for dually related predicates. It is generic in the sense that it can be applied to arbitrary predicates. On the other hand, it works only within the generic ABE framework recently proposed by Attrapadung (Eurocrypt\u2714), which provides a generic compiler that compiles a simple primitive called pair encodings into fully secure ABE. Inside this framework, Attrapadung proposed the first generic dual conversion that works only for subclass of encodings, namely, perfectly secure encodings. However, there are many predicates for which realizations of such encodings are not known, and hence the problems of constructing fully secure ABE for their dual predicates were left unsolved.
In this paper, we revisit the dual conversion of Attrapadung, and show that, somewhat surprisingly, the very same conversion indeed also works for broader classes of encodings, namely, computationally secure encodings. Consequently, we thus solve the above open problems as we obtain the first fully secure realizations of completely-unbounded CP-ABE and CP-ABE with short keys for Boolean formulae, via applying the conversion to previously proposed KP-ABE.
Moreover, we provide a generic conversion that converts ABE into its dual-policy variant. Dual-policy ABE (DP-ABE) conjunctively combines both KP-ABE and CP-ABE into one primitive, and hence can be useful in general-purpose applications. As for instantiations, we obtain the first realizations of fully secure DP-ABE for formulae, unbounded DP-ABE for formulae, and DP-ABE for regular languages. The latter two systems are the first to realize such functionalities, let alone are fully secure
Dynamically emergent gravity from hidden local Lorentz symmetry
Gravity can be regarded as a consequence of local Lorentz (LL) symmetry,
which is essential in defining a spinor field in curved spacetime. The
gravitational action may admit a zero-field limit of the metric and vierbein at
a certain ultraviolet cutoff scale such that the action becomes a linear
realization of the LL symmetry. Consequently, only three types of term are
allowed in the four-dimensional gravitational action at the cutoff scale: a
cosmological constant, a linear term of the LL field strength, and spinor
kinetic terms, whose coefficients are in general arbitrary functions of LL and
diffeomorphism invariants. In particular, all the kinetic terms are prohibited
except for spinor fields, and hence the other fields are auxiliary. Their
kinetic terms, including those of the LL gauge field and the vierbein, are
induced by spinor loops simultaneously with the LL gauge field mass. The LL
symmetry is necessarily broken spontaneously and hence is nothing but a hidden
local symmetry, from which gravity is emergent.Comment: 7 pages; version accepted for publication in Phys. Lett. B; a table,
footnotes, references, and comments adde
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