118,079 research outputs found
Econometric Analysis of Foreign Reserves and Some Macroeconomic Variables in Nigeria (1970–2007)∗
Countries are showing interest in accumulating foreign
reserves to ensure macroeconomic stability. There has been some debate
whether to beef up the level of nations’ foreign reserves or make it lower,
especially in developing countries like Nigeria. Whereas some argue that
the foreign reserve determines the country’s rating in the global market,
others hold opposing views. In this light, this paper examined the interactive
influence of foreign reserve (FRS) on some macroeconomic variables such
as: economic size (GDP); trade; level of capital inflows (KFL); exchange
rate (EXR); and inflation. Analyzing secondary data from CBN statistical
bulletins (1970–2007), the econometric results obtained from cointegration
test, vector error correction (VEC) within the framework of autoregressive
distributed lags (ARDL) revealed the following: (1) existence of a longrun
relationship between the variables and two cointegrating equations;
(2) possibility of convergence of the variables from the short run to the
long run with slow speed of adjustment. It is thus the conclusion of this
paper that accumulation of large foreign reserves is not very productive
in Nigeria due to its inability to induce some of the macroeconomic
variables
Fundamental Physics With Cosmic High-Energy Gamma Rays
High-energy photons (above the MeV) are a powerful probe for astrophysics and
for fundamental physics under extreme conditions. During the recent years, our
knowledge of the high-energy gamma-ray sky has impressively progressed thanks
to the advent of new detectors for cosmic gamma rays, at ground (H.E.S.S.,
MAGIC, VERITAS, HAWC) and in space (AGILE, Fermi). This presentation reviews
the present status of the studies of fundamental physics problems with
high-energy gamma rays, and discusses the expected experimental developments.Comment: Invited Talk at the 6th International Symposium on High-Energy
Gamma-Ray Astronomy (Gamma2016), Heidelberg, July 201
Optimizing Abstract Abstract Machines
The technique of abstracting abstract machines (AAM) provides a systematic
approach for deriving computable approximations of evaluators that are easily
proved sound. This article contributes a complementary step-by-step process for
subsequently going from a naive analyzer derived under the AAM approach, to an
efficient and correct implementation. The end result of the process is a two to
three order-of-magnitude improvement over the systematically derived analyzer,
making it competitive with hand-optimized implementations that compute
fundamentally less precise results.Comment: Proceedings of the International Conference on Functional Programming
2013 (ICFP 2013). Boston, Massachusetts. September, 201
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