Capacity constraints and the prospects for external adjustment and economic growth: 1989-90

Manufactures ; Exports ; Balance of trade

Life Beyond the Mailbox: A Cross-Tool Perspective on Personal Information Management

Email interfaces provide poor support for the personal information management (PIM) activities that users have adopted them for. This paper reports a user study that highlights how two aspects of PIM, information management and task management, cut across a range of tools, including email. We argue that effective support for such cross-tool activities cannot be provided through a focus on one interface such as email alone. Instead, a cross-tool approach is needed in PIM-related research and design. We present a prototype aimed at improving cross-tool support for information management, and report the results from an initial evaluation

Primary connections in a provincial Queensland school system: relationships to science teaching self-efficacy and practices

The teaching of science is important, both to meet the need for future workers in fields requiring scientific capability and to equip students for full participation in modern societies where many decisions depend upon knowledge of science. However, many teachers in Australian primary schools do not allocate science education sufficient amounts of time to achieve these outcomes. This study reports data obtained from 216 teachers in the primary schools in a provincial Australian school system. The purpose of the study was to assess the effects of existing strategies using Primary Connections for promoting science teaching and to inform future professional development strategies. Teachers reported moderate levels of self-efficacy for teaching science and a proportion reported allocating little or no time to teaching science. Both self-efficacy for science teaching and the amount of science taught were higher for teachers who had used Primary Connections curriculum materials

Social Capital: A review from an ethics perspective

In this paper we extend previous reviews of the social capital literature to encompass an ethics perspective. First, we update previous reviews of social capital. Social capital continues to gain currency in both academic and practical circles, despite relatively little critical reflection on the implications of promoting this popular concept. Our work goes some way to rectifying this paucity in understanding what has been termed the ‘dark side’ of social capital. In particular, we review the social capital concept from the perspective of three theories of business ethics: utilitarianism, justice and ethic of care. While the utilitarian perspective closely parallels accounts of social capital’s rationale, the concept’s operation is mirrored very closely by the assumptions underpinning the ethic of care, while the dark side of social capital is commonly given voice in justice-based critiques. We conclude by considering the implications of our analysis

Domestic open market operations during 2000

Open market operations ; Monetary policy ; Federal Open Market Committee

Highlights of domestic open market operations during 1998

The Trading Desk at the Federal Reserve Bank of New York uses open market operations to implement the policy directives of the Federal Open Market Committee (FOMC). The FOMC expresses its short-term objective for open market operations as a target level for the federal funds rate--the interest rate at which depository institutions lend balances at the Federal Reserve to other depository institutions. To keep the federal funds rate near the level specified by the FOMC, the Desk uses open market operations to bring the supply of balances at the Federal Reserve into line with the demand for them. In 1998, the level of balances that depository institutions were required to hold at the Federal Reserve continued to decline, to historic lows. The primary reason for this was the ongoing proliferation of retail "sweep" programs, which transfer depositors' funds from transaction accounts that are subject to reserve requirements into other deposit accounts that are not. In past years, declines in required balances had been associated with greater volatility in the federal funds rate because depository institutions have less flexibility in managing their daily balance positions. However, through the first three quarters of 1998, the funds rate behaved much as it had in 1997, even though required balances were lower. In the final quarter of 1998, funds rate volatility rose when market participants evinced greater concerns about the credit quality of their counterparties at a time of increased uncertainty in financial markets.Open market operations ; Monetary policy ; Federal funds market (United States)

Application of intersatellite links to domestic satellite systems

The results of a study on intersatellite link (ISL) applications for domestic satellite communications are presented. It was determined if any technical, economic, or performance benefits could be gained by introducing intersatellite links into a domestic satellite communication network. Several key systems issues of domestic ISL's are addressed. These include the effect of a skewed traffic distribution on the selection of ISL satellite orbit locations, tolerable satellite spacing, and crosslink traffic-handling requirements. An ISL technology assessment is made by performing a parametric link analysis for several microwave and optical implementations. The impact of the crosslink on the end-to-end link performance is investigated for both regenerative and nonregenerative ISL architectures. A comparison is made between single satellite systems operating at C-, and Ku-bands and the corresponding ISL systems in terms of ground segment cost, space segment cost, and net link performance. Results indicate that ISL's can effectively expand the CONUS orbital arc, with a 60 GHz ISL implementation being the most attractive

DMSP F7 observations of a substorm field‐aligned current

In this paper we present observations of a substorm field-aligned current (FAC) system that DMSP F7 traversed just after 0300 UT on April 25, 1985. Ground magnetometer data show that a major substorm was in progress at that time and that DMSP F7 flew through a region of predominantly upward FAC. The DMSP F7 magnetic field data are consistent with this interpretation. The precipitating particle data suggest that there were three distinct large-scale FAC systems. In ascending latitude these were a downward current, an upward current, and a paired upward/downward current system. We identify the first current, which was coincident with the diffuse aurora, as region 2. The next (upward) FAC was coincident with a spatially unstructured region of energetic (∼12 keV) electron precipitation. This was the substorm-associated FAC that made up part of the current wedge. The upward/downward current pair was coincident with a region of highly structured precipitation. We suggest that these currents may have been the duskside region 1 and, poleward of that, the extension of the dawnside region 1. The particle data show that the upward substorm current lay well equatorward of the boundary between open and closed field lines. In fact, using a model field, the equatorward boundary of the substorm FAC maps to the neutral sheet at 6.9 RE. While one should be cautious in stressing results obtained by mapping model field lines, our result is consistent with scenarios for substorms which postulate a disruption and diversion of the near-Earth cross-tail current

Analysis of a Helmholtz preconditioning problem motivated by uncertainty quantification

This paper analyses the following question: let $\mathbf{A}_j$, $j=1,2,$ be the Galerkin matrices corresponding to finite-element discretisations of the exterior Dirichlet problem for the heterogeneous Helmholtz equations $\nabla\cdot (A_j \nabla u_j) + k^2 n_j u_j= -f$. How small must $\|A_1 -A_2\|_{L^q}$ and $\|{n_1} - {n_2}\|_{L^q}$ be (in terms of $k$-dependence) for GMRES applied to either $(\mathbf{A}_1)^{-1}\mathbf{A}_2$ or $\mathbf{A}_2(\mathbf{A}_1)^{-1}$ to converge in a $k$-independent number of iterations for arbitrarily large $k$? (In other words, for $\mathbf{A}_1$ to be a good left- or right-preconditioner for $\mathbf{A}_2$?). We prove results answering this question, give theoretical evidence for their sharpness, and give numerical experiments supporting the estimates. Our motivation for tackling this question comes from calculating quantities of interest for the Helmholtz equation with random coefficients $A$ and $n$. Such a calculation may require the solution of many deterministic Helmholtz problems, each with different $A$ and $n$, and the answer to the question above dictates to what extent a previously-calculated inverse of one of the Galerkin matrices can be used as a preconditioner for other Galerkin matrices

Critical Digital Pedagogies in Modern Languages – a Tutorial Collection

This introduction sets out the context for this special collection of self-learning online tutorials exploring critical pedagogies in Modern Languages. Previous research has demonstrated that, while some areas within the Modern Languages (such as language pedagogy) have a long history of engagement with digital mediation through approaches such as CALL, MALL and TELL, broader experience with digital culture and technology within the field is characterised by uncertainty, scepticism and sometimes anxiety. This is particularly apparent in the area of digital literacy acquisition – a survey we carried out in 2019 demonstrated significant interest in acquiring digital literacies appropriate to Modern Languages education and research, but also doubts about which literacies needed to be acquired and how to acquire them. This collection consists of practical and open educational resources for use in the Modern Languages, but it also represents an interrogation of the affordances and limitations generated by digital mediation. In this introduction we highlight some of the challenges that the collection had to overcome, and in so doing, we hope to foster wider discussion about how digital learning resources can be better integrated into Modern Languages education and research across languages, across educational levels and across digital platforms