NATURAL COMMUNICATIONS STUDY PHASE I, FEASIBILITY STUDY ON A RELIABLE POLAR HF COMMUNICATIONS SYSTEM

1963 ◽  
Author(s):  
Geoffrey E. Hill ◽  
Sidney M. Bennett ◽  
Claude J. Mazzola
Keyword(s):  
Phase I ◽  
Feasibility Study ◽  
Study Phase ◽  
Hf Communications ◽  
Communications System

Diamond Turning of F-111 Windscreens: Feasibility Study Phase I

1978 ◽  
Vol 17 (6) ◽  
Author(s):  
Theodore T. Saito ◽  
J. Taboada ◽  
B. R. Altschuler
Keyword(s):  
Phase I ◽  
Feasibility Study ◽  
Diamond Turning ◽  
Study Phase

scholarly journals The Canadian Safe Driving Study—Phase I pilot: Examining potential logistical barriers to the full cohort study

2013 ◽  
Vol 61 ◽  
pp. 236-244 ◽  
Author(s):  
Shawn C. Marshall ◽  
Keith G. Wilson ◽  
Malcolm Man-Son-Hing ◽  
Ian Stiell ◽  
Andrew Smith ◽  
...  
Keyword(s):  
Cohort Study ◽  
Phase I ◽  
Study Phase ◽  
Full Cohort ◽  
Safe Driving

PO-417 A PHASE I FEASIBILITY STUDY FOR HDR INTERSTITIAL BRACHYTHERAPY USING 60CO FOR DIFFERENT SITES

2012 ◽  
Vol 103 ◽  
pp. S166
Author(s):  
S. Basu ◽  
A. Basu ◽  
K. Ghosh ◽  
S. Datta ◽  
S. Mullick
Keyword(s):  
Phase I ◽  
Feasibility Study ◽  
Interstitial Brachytherapy

190 Changing national trends in sleep and related features among Korean adults between 2009 and 2018

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A76-A77
Author(s):  
Jee-Eun Yoon ◽  
Daeyoung Kim ◽  
Kwang Ik Yang ◽  
Min Kyung Chu ◽  
Chang-Ho Yun
Keyword(s):  
Phase I ◽  
Sleep Duration ◽  
Adult Population ◽  
Population Level ◽  
Nationwide Survey ◽  
Study Phase ◽  
Poor Sleep ◽  
Cross Sectional ◽  
Targeted Interventions ◽  
Korean Adults

Abstract Introduction Sleep patterns have been linked to various heath disease. Evaluating population-level trend of sleep could provide a comprehensive population health-forecasting model that has the potential to inform targeted interventions. Therefore, we aimed to examine the cross-sectional differences in sleep characteristics among Korean adults during a 9-year period of 2009-2018. Methods The data in this study were derived from two nationwide survey regarding sleep and headache in the representative sample of Korean adult population, namely the Korean Sleep Headache Study phase I (2009) and II (2018). The survey was conducted through door-to-door visit and face-to-face interview by using structured questionnaires. Total of 2,836 participants from Phase I (47.9±16.4 years old; female, 50.2%) and 2,501 participants (47.9±16.4 years old; female, 50.3%) from Phase II gave informed consents and completed the survey. For this study, we excluded those who worked as shift workers and missing data. From the MCTQ, we collected participants’ sleep schedule during workdays and free days over the past four weeks. Average sleep duration was a weighted mean of sleep duration on workdays and free days. Poor sleep quality was defined as PSQI >5. Excessive daytime sleepiness and Depression are performed with ESS and PHQ-9, respectively. Results During the 9 years, average sleep duration decreased by 21 minutes, especially more reduction on free days (workday: 7:17±1:58 vs. 7:06±1:06, p <0.001; free days 8:04±2:32 vs. 7:49±1:23, p <0.001). People go to sleep and wake up earlier on workday (workday 23:39±1:50 vs. 23:25±1:30, p <0.001; free days 23:51±2:11 vs. 23:25±2:11, p <0.001), whereas they go to bed earlier and wake up later on free days compared to past (workday 6:52±1:36 vs. 6:37±1:11, p <0.001; 7:42±2:04 vs. 7:49±1:42 p =0.023). Social jetlag was increased by 5 minutes (0:46±1:35 vs. 0:51±0:52, p =0.028). There was the difference of age on the habitual sleep-wake rhythm and sleep related symptoms. Also, short or long sleep duration was associated with a significant increase in each health outcomes. Conclusion Decreased sleep duration seems to be on the rise in the general adult population, which lead to a poor health status. Interventions to promote adequate sleep is urgently needed. Support (if any):

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