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SEOUL NATIONAL UNIVERSITY AGN MONITORING PROJECT. I. STRATEGY AND SAMPLE

  • Woo, Jong-Hak;Son, Donghoon;Gallo, Elena;Hodges-Kluck, Edmund;Jeon, Yiseul;Shin, Jaejin;Bae, Hyun-Jin;Cho, Hojin;Cho, Wanjin;Kang, Daeun;Kang, Wonseok;Karouzos, Marios;Kim, Minjin;Kim, Taewoo;Le, Huynh Anh N.;Park, Daeseong;Park, Songyoun;Rakshit, Suvendu;Sung, Hyun-il
    • Journal of The Korean Astronomical Society
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    • v.52 no.4
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    • pp.109-119
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    • 2019
  • While the reverberation mapping technique is the best available method for measuring black hole mass in active galactic nuclei (AGNs) beyond the local volume, this method has been mainly applied to relatively low-to-moderate luminosity AGNs at low redshift. We present the strategy of the Seoul National University AGN Monitoring Project, which aims at measuring the time delay of the $H{\beta}$ line emission with respect to AGN continuum, using a sample of relatively high luminosity AGNs out to redshift z ~ 0.5. We present simulated cross correlation results based on a number of mock light curves, in order to optimally determine monitoring duration and cadence. We describe our campaign strategy based on the simulation results and the availability of observing facilities. We present the sample selection, and the properties of the selected 100 AGNs, including the optical luminosity, expected time lag, black hole mass, and Eddington ratio.

A study for quality assurance of visiting nurses service of a public health center (보건소 방문 간호 사업의 질보장을 위한 연구)

  • Yun, Soon-Nyoung;Lee, In-Sook;Hyun, Hye-Jin;You, In-Ja;Kim, Jai-Nam;Bae, Jung-Hee
    • Research in Community and Public Health Nursing
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    • v.6 no.2
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    • pp.275-285
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    • 1995
  • The purpose of the study is to evaluate the visiting nurses service of a public health center. Data were collectd from the 36 clients who received services from a public health center. In terms of the process evaluation, the tool is composed 4 parts, 27 items such as assessment planning, implementation, and evaluation. It was measured through the health records by 2 peer review. In terms of the outcome evaluation, the level of client satisfaction was measured by self report or interview by 2 supervisor. The result were as follows: 1. 30% of 36 health records showed narsing process was not and out of them, nursing care plann including spectific activities were rarely established or unclear. 2. The lack of systematic data collection' showed and nursing diagnosis was not adressed in health records review. 3. Client satisfaction score was 32, 97, out of maximum score 36. 4. The lack of sufficent objective data, care plan, record of client's health status change, and evaluation was founded therefore quality assurance for visiting nurses service and in-service education are required and the development of standardized record system need.

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Propagation of Human Embryonic Stem Cells on Human Amniotic Fluid Cells as Feeder Cells in Xeno-Free Culture Conditions

  • Jung, Juwon;Baek, Jin Ah;Seol, Hye Won;Choi, Young Min
    • Development and Reproduction
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    • v.20 no.1
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    • pp.63-71
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    • 2016
  • Human embryonic stem cells (hESCs) have been routinely cultured on mouse embryonic fibroblast feeder layers with a medium containing animal materials. For clinical application of hESCs, animal-derived products from the animal feeder cells, animal substrates such as gelatin or Matrigel and animal serum are strictly to be eliminated in the culture system. In this study, we performed that SNUhES32 and H1 were cultured on human amniotic fluid cells (hAFCs) with KO-SR XenoFree and a humanized substrate. All of hESCs were relatively well propagated on hAFCs feeders with xeno-free conditions and they expressed pluripotent stem cell markers, alkaline phosphatase, SSEA-4, TRA1-60, TRA1-81, Oct-4, and Nanog like hESCs cultured on STO or human foreskin fibroblast feeders. In addition, we observed the expression of nonhuman N-glycolylneuraminic acid (Neu5GC) molecules by flow cytometry, which was xenotransplantation components of contamination in hESCs cultured on animal feeder conditions, was not detected in this xeno-free condition. In conclusion, SNUhES32 and H1 could be maintained on hAFCs for humanized culture conditions, therefore, we suggested that new xeno-free conditions for clinical grade hESCs culture will be useful data in future clinical studies.