Skills shortages and training: a forgotten dimension in new technology

Foley, Paul; Watts, Donald J.

doi:10.1111/j.1467-9310.1994.tb00879.x

Cited by 19 publications

(35 citation statements)

References 1 publication

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“…Image subtraction was accomplished using Py-ZOGY (Guevel & Hosseinzadeh 2017), an implementation in Python of the subtraction algorithm described by Zackay et al (2016). In addition, SN 2017cfd was observed by the Foundation Supernova Survey in the g, r, i, and z filters for 6 epochs and published by Foley et al (2018); we include these data in our light-curve analysis.…”

Section: Discovery and Observationsmentioning

confidence: 99%

SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young

Han

Zheng

Stahl

et al. 2020

ApJ

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The Type Ia supernova (SN Ia) 2017cfd in IC 0511 (redshift z = 0.01209 ± 0.00016) was discovered by the Lick Observatory Supernova Search 1.6 ± 0.7 d after the fitted first-light time (FFLT; 15.2 d before B-band maximum brightness). Photometric and spectroscopic follow-up observations show that SN 2017cfd is a typical, normal SN Ia with a peak luminosity M B ≈ −19.2±0.2 mag, ∆m 15 (B) = 1.16 mag, and reached a B-band maximum ∼16.8 d after the FFLT. We estimate there to be moderately strong host-galaxy extinction (A V = 0.39 ± 0.03 mag) based on MLCS2k2 fitting. The spectrum reveals a Si II λ6355 velocity of ∼ 11, 200 km s −1 at peak brightness. SN 2017cfd was discovered very young, with multiband data taken starting 2 d after the FFLT, making it a valuable complement to the currently small sample (fewer than a dozen) of SNe Ia with color data at such early times. We find that its intrinsic early-time (B − V ) 0 color evolution belongs to the "blue" population rather than to the distinct "red" population. Using the photometry, we constrain the companion star radius to be 2.5 R , thus ruling out a red-giant companion.

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Section: Discovery and Observationsmentioning

confidence: 99%

SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young

Han

Zheng

Stahl

et al. 2020

ApJ

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“…Although some Foundation data were discovered by targeted searches, untargeted surveys would likely have reported many of these targeted events if targeted surveys with greater depth or higher cadence (e.g., DLT40; Tartaglia et al 2018) had not discovered them first . Untargeted surveys independently discovered 94% of the Foley et al (2018) sample.…”

Section: Introductionmentioning

confidence: 99%

“…Foundation aims to compile a sample of up to 800 SNe Ia observed in griz over the next several years. The Foundation Data Release 1 (DR1) includes 180 SNe Ia that pass the Foley et al (2018) sample criteria for inclusion in a cosmological analysis, approximately equal to the number of published, cosmologically useful SNe Ia from all previous low-z samples combined (Betoule et al 2014; J18; S18). The Dark Energy Survey cosmological analysis (DES Collaboration et al 2018), for example, uses just 122 low-z SNe Ia.…”

Section: Introductionmentioning

confidence: 99%

The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope

Jones

Scolnic

Foley

et al. 2019

ApJ

102

100

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Measurements of the dark energy equation-of-state parameter, w, have been limited by uncertainty in the selection effects and photometric calibration of z < 0.1 Type Ia supernovae (SNe Ia). The Foundation Supernova Survey is designed to lower these uncertainties by creating a new sample of z < 0.1 SNe Ia observed on the Pan-STARRS system. Here, we combine the Foundation sample with SNe from the Pan-STARRS Medium Deep Survey and measure cosmological parameters with 1,338 SNe from a single telescope and a single, well-calibrated photometric system. For the first time, both the low-z and high-z data are predominantly discovered by surveys that do not target pre-selected galaxies, reducing selection bias uncertainties. The z > 0.1 data include 875 SNe without spectroscopic classifications and we show that we can robustly marginalize over CC SN contamination. We measure Foundation Hubble residuals to be fainter than the pre-existing low-z Hubble residuals by 0.046 ± 0.027 mag (stat+sys). By combining the SN Ia data with cosmic microwave background constraints, we find w = −0.938 ± 0.053, consistent with ΛCDM. With 463 spectroscopically classified SNe Ia alone, we measure w = −0.933 ± 0.061. Using the more homogeneous and better-characterized Foundation sample gives a 55% reduction in the systematic uncertainty attributed to SN Ia sample selection biases. Although use of just a single photometric system at low and high redshift increases the impact of photometric calibration uncertainties in this analysis, previous low-z samples may have correlated calibration uncertainties that were neglected in past studies. The full Foundation sample will observe up to 800 SNe to anchor the LSST and WFIRST Hubble diagrams.

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“…Mipatzon of staff -Previous empirical analysis (Berthoud 1980;Foley et al, 1994) suggests that management and professional groups are five times as likely to migrate forjob reasons as manual workers. This suggests that employees at the higher levels of the workforce hierarchy, such as those recruited at Stages 1 or 2 are more likely to be drawn from a wider geographical area than production workers on the shop floor.…”

Section: Direct Labour Market Effectsmentioning

confidence: 99%

The Impact of Toyota on Derbyshire's Local Economy and Labour Market

Foley

Hutchinson

Herbane

et al. 1996

Tijd voor Econ & Soc Geog

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Many localities are aware of the need to attract inward investment. Thir article examines the impact of Toyota's 2700 million investment in Derbyshire. It investigates its direct and indirect employment effects. The article attempts to go beyond the predominantly quantitative approach adopted in previous studies by examining the characteristics of the newjobs at Toyota, and those who secure them. In addition, the nature of supplier likages and multiplier effects is investigated to analyse secondary effects. Whilst approximately 3,000 jobs will be directly created by Toyota, there may be some disruptive effects in the local labour market. Furthermore, the potential for employment through supplier linkages and multiplier effects has not yet been maximised, although it is possible that these may materialise in the longer term. Discussion of these factors clearly highlights the fact that the attraction of inward investment is only the first stage in the process of significant job creation.

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Skills shortages and training: a forgotten dimension in new technology

Cited by 19 publications

References 1 publication

SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young

SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young

The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope

The Impact of Toyota on Derbyshire's Local Economy and Labour Market

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