Group-delay measurement of frequency-converting devices using a comb generator

We propose a new method for the measurement of (group) delay from the radio-frequency (RF) input to the intermediate-frequency (IF) output of a mixer or a receiver. The method is particularly convenient for measuring the change in group delay with the local-oscillator (LO) tuning frequency of the receiver since the method does not require access to, or even knowledge of, the LO signal. The method employs a calibrated comb (impulse) generator. Other required equipment is limited to a reference signal generator and a digitizer of modest bandwidth, allowing the measurement to rely on a low-frequency generator and an oscilloscope. Simulated and measured data are presented to verify the approach

Perceived financial barriers and the start-up decision: An econometric analysis of gender differences using GEM data

Although accessing finance is key to the foundation of any business, particular concerns have been expressed about the ability of UK women-owned firms to obtain external finance. In this paper we use an econometric approach to explore the effect of perceptions of financial barriers to start-up on the start-up decision itself. Our analysis is based on the Global Entrepreneurship Monitor (GEM) UK 2004 database. Standardising for a range of individual characteristics, we find that women are around 7.4 per cent more likely to perceive financial barriers to business start-up than men. As perceptions of financial barriers are linked negatively to the start-up decision, stronger perceptions of financial barriers among women are having a disproportionate effect on women’s start-up decisions. However, being female also has an additional negative effect on the start-up decision, not linked to financial barriers. Policy responses, therefore, need to take into account the demand-side with the aim of countering the more negative perceptions of start-up finance among potential women entrepreneurs. Mentoring and confidence building programmes are obvious possibilities. We also find support for the value of university and college-based work experience programmes. [PUBLISHED ABSTRACT]Finance; entrepreneurship; start-up; SME; gender; women

Barriers faced by SMEs in raising bank finance

Purpose – The purpose of this paper is to use univariate statistical analysis to investigate barriers to raising bank finance faced by UK small and medium‐sized enterprises (SMEs), specifically the impact of personal characteristics (ethnicity, gender and education). Design/methodology/approach – A conceptual model was developed and the results of a telephone survey of 400 SMEs conducted (before the “credit crunch”) by the Barclays Bank small business research team were analysed. The survey was based on a large stratified random sample drawn from the Bank's entire SME population. Findings – It was found that education made little difference to sources of finance, except that those educated to A‐level more frequently used friends and family and remortgaged their homes. However, graduates had the least difficulties raising finance. Though statistically insignificant, women respondents found it easier to raise finance than men. The survey confirmed that – and this finding was statistically significant – ethnic minority businesses, particularly black owner‐managers, had the greatest problem raising finance and hence relied upon “bootstrapping” as a financing strategy. Practical implications – The study makes an important contribution to filling a research gap, given the critical need of policy‐makers to understand differentials between different types of owner‐managers. It brings new insights into its field – access to finance – and with respect, especially, to marginalised groups. Originality/value – The paper adopts a different approach than many prior studies, with a large sample and robust analysis, to explore a critical need‐to‐know area in a new way – both for policy‐makers and academics in the field of SME finance

Active networking : one view of the past, present, and future

All distributed computing systems face the architectural question of the location (and nature) of programmability in the telecommunications networks, computers, and other peripheral devices comprising them. The perspective of this paper is that network elements should be as programmable as possible, to enable the most flexible distributed computing systems. There has been a persistent confluence among operating systems, programming languages, networking and distributed systems. We demonstrate how these interactions led to what is called active networking , and in the spirit of vox audita perit, littera scripta manet (the spoken word perishes, but the written word remains), include an account of how it was made to happen. Lessons are drawn both from the broader research agenda, and the specific goals pursued in the SwitchWare project. We speculate on likely futures for active networking

Discouraged Advisees? The Influence of Gender, Ethnicity, and Education in the Use of Advice and Finance by UK SMEs

We investigate the influence of gender, ethnicity, and education in the use of external advice and finance by UK small and medium-sized enterprises (SMEs). A conceptual model of 'discouraged advisees' was developed as a framework for analysis of the results of a telephone survey of 400 SMEs. We found an association between the use of external advice and the ability to raise bank finance. Furthermore, both men and black and minority ethnic (BME) participants were more likely to use family and friends for advice, whilst women were twice as likely as men to use Business Link. BME business owners were discouraged from using less 'trusted' sources, such as Business Link, possibly believing them insufficiently tailored or that they would provide inappropriate advice. Therefore, the findings provide support for our conceptual model of discouraged advisees and have implications for the provision of advice for business owners from BME communities