241,711 research outputs found
Lump-Sum Taxes in a R&D Model
Is it possible to increase growth and welfare by raising taxes and disposing of the tax revenues? We show this may indeed be the case in a simple model with endogenous technical change, represented by an increase in the variety of intermediate goods.
Determinants of the international influence of a R&D organisation: a bibliometric approach
Traditionally, studies on the influence and impact of knowledge-producing organisations have been addressed by means of strict economic analysis, stressing their economic impact to a local, regional or national extent. In the present study, an alternative methodology is put forward in order to evaluate the international scientific impact and influence of a knowledge-producing and -diffusing institution. We introduce a new methodology, based on scientometric and bibliometric tools, which complement traditional assessments by considering the influence of a R&D institution when looking at the scientific production undertaken and the recognition of its relevance by its international peer community. Focusing on the most prolific scientific areas of INESC Porto, and resorting to published scientific work recorded in the Science Citation Index (SCI), we show that INESC Porto has enlarged its international scientific network. The logit estimations demonstrate that the wide geographical influence of INESC Porto scientific research is a result not of its international positioning in terms of co-authorships, but rather a result of the quality of its scientific output.Impact and influence assessment methods; R&D Institutions; Bibliometrics, Scientometrics; knowledge network; INESC Porto
Determinants of the international influence of a R&D organisation: a bibliometric approach
Traditionally, studies on the influence and impact of knowledge-producing organisations have been addressed by means of strict economic analysis, stressing their economic impact to a local, regional or national extent. In the present study, an alternative methodology is put forward in order to evaluate the international scientific impact and influence of a knowledge-producing and -diffusing institution. We introduce a new methodology, based on scientometric and bibliometric tools, which complement traditional assessments by considering the influence of a R&D institution when looking at the scientific production undertaken and the recognition of its relevance by its international peer community. Focusing on the most prolific scientific areas of INESC Porto, and resorting to published scientific work recorded in the Science Citation Index (SCI), we show that INESC Porto has enlarged its international scientific network. The logit estimations demonstrate that the wide geographical influence of INESC Porto scientific research is a result not of its international positioning in terms of co-authorships, but rather a result of the quality of its scientific output.Impact and influence assessment methods; R&D Institutions; Bibliometrics, Scientometrics; knowledge network; INESC Porto
On the simplicity of homeomorphism groups of a tilable lamination
We show that the identity component of the group of homeomorphisms that
preserve all leaves of a R^d-tilable lamination is simple. Moreover, in the one
dimensional case, we show that this group is uniformly perfect. We obtain a
similar result for a dense subgroup of homeomorphisms.Comment: 14
On pairs of definable orthogonal families
We introduce the notion of an M-family of infinite subsets of \nn which is
implicitly contained in the work of A. R. D. Mathias. We study the structure of
a pair of orthogonal hereditary families \aaa and \bbb, where \aaa is
analytic and \bbb is -measurable and an M-family.Comment: 21 pages, no figures. Illinois Journal of Mathematics (to appear
A R&D Based Real Business Cycle Model
The New Keynesian Real Business Cycle model with staggered price adjustment is augmented with a R&D producing sector. Two sources of economic shocks are separately considered, namely random participation (perturbances to value of alternative investment opportunities in another sector) and financial intermediation (shocks to the cost of raising capital in the financial intermediation market). We find that, when comparing to the baseline model, both random participation and financial intermediation models can explain pro-cyclical R&D spending. Additionally the investment oversensitivity problem is corrected. However, only the financial intermediation model is consistent with the observed finding that the volatility of R&D is larger than that of investment and output
DME-Fired Water-Tube Boiler - A R&D Study
Increasing attention has been given to the development of low-NOx combustion technology for DME (Dimethyl Ether). The present paper describes the R&D study for water-tube boiler carried out in Kansai University and Hirakawa Guidam Co., Ltd. under the support of DME project from METI. The major problem in DME use is the difficulty in the application of premixed flame due to its low ignition temperature and rather high burning velocity. However, the previously developed tube-nested combustor, i.e. water-tubes installed in the empty furnace, becomes effective means together with the flue-gas recirculation to overcome such difficulty in achieving low-NOx combustion. This paper begins with a brief review of the R&D study of the tube-nested combustor specifically designed for city gas. Then the further development for DME-fired water-tube boiler is described
Spontaneous compactification in 2D induced quantum gravity
Spontaneous compactification ---on a background--- in 2D
induced quantum gravity (considered as a toy model for more fundamental quantum
gravity) is analyzed in the gauge-independent effective action formalism. It is
shown that such compactification is stable, in contradistinction to
multidimensional quantum gravity on a background
---which is known to be one-loop unstable.Comment: 11 PAGE
Toeplitz operators and Carleson measures in strongly pseudoconvex domains
We study mapping properties of Toeplitz operators associated to a finite
positive Borel measure on a bounded strongly pseudoconvex domain D in n complex
variables. In particular, we give sharp conditions on the measure ensuring that
the associated Toeplitz operator maps the Bergman space A^p(D) into A^r(D) with
r>p, generalizing and making more precise results by Cuckovic and McNeal. To do
so, we give a geometric characterization of Carleson measures and of vanishing
Carleson measures of weighted Bergman spaces in terms of the intrinsic
Kobayashi geometry of the domain, generalizing to this setting results obtained
by Kaptanoglu for the unit ball.Comment: 36 page
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