Light-cone Gauge NSR Strings in Noncritical Dimensions

Light-cone gauge NSR string theory in noncritical dimensions should correspond to a string theory with a nonstandard longitudinal part. Supersymmetrizing the bosonic case [arXiv:0909.4675], we formulate a superconformal worldsheet theory for the longitudinal variables X^{\pm}, \psi^{\pm}. We show that with the transverse variables and the ghosts combined, it is possible to construct a nilpotent BRST charge.Comment: 22 pages, 1 figur

Visibility and aerosol measurement by diode-laser random-modulation CW lidar

Examples of diode laser (DL) random-modulation continuous wave (RM-CW) lidar measurements are reported. The ability of the measurement of the visibility, vertical aerosol profile, and the cloud ceiling height is demonstrated. Although the data shown here were all measured at night time, the daytime measurement is, of course, possible. For that purpose, accurate control of the laser frequency to the center frequency of a narrow band filter is required. Now a new system with a frequency control is under construction

Learning Behaviors of Stochastic Automata and Some Applications

It is known that stochastic automata can be applied to describe the behavior of a decision maker or manager in the condition of uncertainty. This paper discusses learning behaviors of stochastic automata under unknown nonstationary multi-teacher environment. The consistency of sequential decision making procedures is proved under some mild conditions

Method for making conductors for ferrite memory arrays

The ferrite memory arrays are made from pre-formed metal conductors for the ferrite arrays. The conductors are made by forming a thin sheet of a metallizing paste of metal alloy powder, drying the paste layer, bisque firing the dried sheet at a first temperature, and then punching the conductors from the fired sheet. During the bisque firing, the conductor sheet shrinks to 58 percent of its pre-fired volume and the alloy particles sinter together. The conductors are embedded in ferrite sheet material and finally fired at a second higher temperature during which firing the conductors shrink approximately the same degree as the ferrite material

D-brane States and Disk Amplitudes in OSp Invariant Closed String Field Theory

We construct solitonic states in the OSp invariant string field theory, which are BRST invariant in the leading order of regularization parameter $\epsilon$. We calculate the disk amplitudes using these solitonic states and show that they describe D-branes and ghost D-branes.Comment: 37 pages, 8 figure

Fiscal Policy in Nigeria: An Appraisal of the Increasing Role of Sub-National Governments

The conduct of economic policy is a shared responsibility of the three tiers of government in Nigeria with federal government having the largest share especially in the area of revenue generation, hence the role of state and local governments in the fiscal policy actions in the past are often disregarded. Analysts are, however, of the view that, in recent times, particularly with the entrenchment of democratic governance, the fiscal policy feats of sub-national government put together are becoming as important as that of federal government. This study therefore assesses the trend in the fiscal policy roles of the three tiers of government in Nigeria, to determine which is dominant; federal or state and local governments put together. The findings of the study indicate that, there is still a “centripetal” bias in the assignments of revenue powers without regard to expenditure responsibilities. The expenditure trends of the sub-national governments have surpassed that of federal government without a corresponding increase in their revenue powers, thereby makes them heavily dependent on federal government for revenue. It also finds an increasing trend in the fiscal deficit of sub-national government. The study suggests further divulgence of tax base in favour of sub-national governments or increase in their share of Federation Account as well as diversification of the nation’s revenue base so as to improve the revenue accruable to all tiers of government. Keywords: Fiscal policy, government, revenue, expenditure, budge

Nigeria’s Potential Growth and Output Gap: Application of Different Econometrics Filters

The concept of potential output and the corresponding output gap had received considerable attention by both policy makers and academic researchers, particularly in the developed countries. This is a reflection of not only its theoretical significance, but also its policy relevance. Output gap is used to model price and wage inflation, in estimating fiscal balance and the impact of structural reforms on the economy, hence an important indicator of fiscal policy trust. Most importantly, to a central banker it is critical in modelling monetary policy decision making process, as it serves as an input into central banks economic projections which forms an integral part of monetary policy decision and the setting of monetary policy rates. This paper measures the potential output and the corresponding output gap for Nigeria using Hodrick-Prescott filter, Baxter-King filter and both fixed and full length Christiano-Fitzgerald filters. The methods yielded different results, but with strong similarities in their evolution over time. According to all the methods, on the average, the economy was over heated during the early part of the sample period (2004:Q1 to 2005:Q4) but operated below capacity between 2008:Q1 and 2009:Q4. Interestingly, a fairly strong and stable relationship exists between inflation and the estimated output gaps. With this noticeable connection, using output gap to compliment expert judgement, in monetary policy decision making, would conceptually be a good decision. Keywords: Potential growth, output gap, econometric filtering, Nigeri

Light-cone Gauge NSR Strings in Noncritical Dimensions II -- Ramond Sector

Light-cone gauge superstring theory in noncritical dimensions corresponds to a worldsheet theory with nonstandard longitudinal part in the conformal gauge. The longitudinal part of the worldsheet theory is a superconformal field theory called X^{\pm} CFT. We show that the X^{\pm} CFT combined with the super-reparametrization ghost system can be described by free variables. It is possible to express the correlation functions in terms of these free variables. Bosonizing the free variables, we construct the spin fields and BRST invariant vertex operators for the Ramond sector in the conformal gauge formulation. By using these vertex operators, we can rewrite the tree amplitudes of the noncritical light-cone gauge string field theory, with external lines in the (R,R) sector as well as those in the (NS,NS) sector, in a BRST invariant way.Comment: 33 pages; v2: minor modification

Spacetime Fermions in Light-cone Gauge Superstring Field Theory and Dimensional Regularization

We consider the dimensional regularization of the light-cone gauge type II superstring field theories in the NSR formalism. In the previous work, we have calculated the tree-level amplitudes with external lines in the (NS,NS) sector using the regularization and shown that the desired results are obtained without introducing contact term interactions. In this work, we study the tree-level amplitudes with external lines in the Ramond sector. In order to deal with them, we propose a worldsheet theory to be used instead of that for the naive dimensional regularization. With the worldsheet theory, we regularize and define the tree-level amplitudes by analytic continuation. We show that the results coincide with those of the first quantized formulation.Comment: 28 pages, 5 figures; v2: more details of our manipulations in subsection 3.2 added, figures and references added; v3: clarifications adde

A Post Market Reform Analysis of Monetary Conditions Index for Nigeria

The introduction of SAP and the accompanying financial market reform in 1986, witnessed a continuous decline of emphasis on direct monetary controls by the Central Bank of Nigeria (CBN) such that the Naira is allowed to freely float while trade and exchange controls were liberalized, market based interest rate policy was introduced and mandatory credit allocation was abolished to pave way for effective implementation of a market based system whereby the use of market forces is encouraged. This led to significant changes in the monetary policy framework of the CBN. However, while the post SAP monetary policy strategies, institutional framework and arrangements as well as instruments have been adequately given research attention, the monetary conditions arising from the adoption of these different strategies, framework and instruments have been largely ignored. The study applied a bounds testing approach to cointegration to estimate the weights of the variables in the broad monetary conditions index for Nigeria for the period 1989:Q1 to 2012:Q2. The result attached a higher weight to interest rate channel, followed by exchange rate channel and then credit channel, implying that interest rate channel is more important than the exchange rate and credit channel in determining the level of output in Nigeria. The resultant monetary conditions index traces fairly well the policy direction of the Central Bank of Nigeria for the studied period, hence can serve as an adequate gauge of monetary policy stance of the CBN. Keywords: Monetary policy, monetary conditions, monetary transmission, ARDL, cointegratio