| 1. |
- Makoto, Kobayashi, et al.
(author)
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High-resolution multispectral satellite image and a postfire ground survey reveal prefire beetle damage on snags in Southern Alaska
- 2013
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In: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 28:6, s. 581-585
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Journal article (peer-reviewed)abstract
- Alaskan spruce forests are exposed to both fire and spruce beetles [Dendroctonus rufipennis (Kirby)]. To understand the influence of spruce beetles on the process through which fire affects ecosystem function, we developed a reconstruction technique to measure prefire damage to trees caused by the spruce beetle. We validated our evaluation of prefire tree conditions using a high-resolution multispectral satellite image by comparing our results with a postfire ground survey. The prefire tree conditions determined by the two methods coincided well with each other. This result suggests that combining high-resolution multispectral imaging and postfire ground surveys of spruce beetles on snags is a powerful tool to determine the prefire condition of a forest in a changing boreal forest ecosystem.
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| 2. |
- Morokuma, Tomoki, et al.
(author)
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Kiso Supernova Survey (KISS) : Survey strategy
- 2014
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In: Nippon Tenmon Gakkai obun kenkyu hokoku. - : Oxford University Press (OUP). - 0004-6264. ; 66:6
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Journal article (peer-reviewed)abstract
- lThe Kiso Supernova Survey (KISS) is a high-cadence optical wide-field supernova (SN) survey. The primary goal of the survey is to catch the very early light of a SN, during the shock breakout phase. Detection of SN shock breakouts combined with multi-band photometry obtained with other facilities would provide detailed physical information on the progenitor stars of SNe. The survey is performed using a 2 degrees.2 x 2 degrees.2 field-of-view instrument on the 1.05-m Kiso Schmidt telescope, the Kiso Wide Field Camera (KWFC). We take a 3-min exposure in g-band once every hour in our survey, reaching magnitude g similar to 20-21. About 100 nights of telescope time per year have been spent on the survey since 2012 April. The number of the shock breakout detections is estimated to be of the order of 1 during our three-year project. This paper summarizes the KISS project including the KWFC observing setup, the survey strategy, the data reduction system, and CBET-reported SNe discovered so far by KISS.
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| 3. |
- Nishigaki, Masakazu, et al.
(author)
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Preventive advice given by patients with type 2 diabetes to their offspring
- 2009
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In: British Journal of General Practice. - : Royal College of General Practitioners. - 0960-1643 .- 1478-5242. ; 59:558, s. 37-42
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Journal article (peer-reviewed)abstract
- BACKGROUND:Patients' advice-giving behaviour could be a useful preventive strategy for type 2 diabetes.AIM:To investigate the conditions under which patients offer advice to their offspring and to assess the factors that facilitate advice giving.DESIGN OF STUDY:Cross-sectional observational study.SETTING:A general hospital with a diabetes clinic in a metropolitan suburb in Japan.METHOD:Parents with type 2 diabetes (n = 221) who had offspring aged 20-49 years inclusive without diabetes completed a self-administered questionnaire containing items relating to advice-giving behaviour, demographic characteristics, risk perception, and their disease status.RESULTS:A total of 184 (83.3%) patients responded that parental advice-giving behaviour is needed for their offspring, while 138 (62.4%) actually advised their offspring. Multiple logistic regression analysis showed that patients who were female (odds ratio [OR] = 1.94, 95% confidence interval [CI] = 1.03 to 3.65, P = 0.041), living with their offspring (OR =1.92, 95% CI = 1.04 to 3.57, P = 0.038), had complications (OR = 2.74, 95% CI = 1.25 to 6.00, P = 0.029), or perceived that their offspring had a high risk of developing diabetes (OR =1.45, 95% CI = 1.09 to 1.93, P = 0.011) were most likely to advise their offspring.CONCLUSION:Patients with type 2 diabetes recognised the need to give advice about preventive behaviour to their offspring but were not necessarily engaging in advice-giving behaviour. Advice-giving behaviour was affected by the parents' own disease status, their perception of their offspring's risk of developing diabetes, and the relationship between the patients and their offspring.
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| 4. |
- Tanaka, Masaomi, et al.
(author)
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DISCOVERY OF DRAMATIC OPTICAL VARIABILITY IN SDSS J1100+4421 : A PECULIAR RADIO-LOUD NARROW-LINE SEYFERT 1 GALAXY?
- 2014
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In: Astrophysical Journal Letters. - 2041-8205 .- 2041-8213. ; 793:2, s. L26-
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Journal article (peer-reviewed)abstract
- We present our discovery of dramatic variability in SDSS J1100+4421 by the high-cadence transient survey Kiso Supernova Survey. The source brightened in the optical by at least a factor of three within about half a day. Spectroscopic observations suggest that this object is likely a narrow-line Seyfert 1 galaxy (NLS1) at z = 0.840, however, with unusually strong narrow emission lines. The estimated black hole mass of similar to 10(7) M-circle dot implies bolometric nuclear luminosity close to the Eddington limit. SDSS J1100+4421 is also extremely radio-loud, with a radio loudness parameter of R similar or equal to 4 x 10(2)-3 x 10(3), which implies the presence of relativistic jets. Rapid and large-amplitude optical variability of the target, reminiscent of that found in a few radio- and gamma-ray-loud NLS1s, is therefore produced most likely in a blazar-like core. The 1.4 GHz radio image of the source shows an extended structure with a linear size of about 100 kpc. If SDSS J1100+4421 is a genuine NLS1, as suggested here, this radio structure would then be the largest ever discovered in this type of active galaxies.
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