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Smartphone Based Quantitative Stress Measurement System
( Suji Choi ),( Jung Sik Yang ),( Jung Hyun Lee ),( Soocheol Kim ),( Chulmin Joo ),( Hyo Il Jung ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
Most people are currently under mental stress whereas its accurate diagnosis and measurement are very difficult to accomplish. For the precise measurement of the stress, either researchers or doctors conduct a survey, electroencephalogram, and bio-signal. The adverse symptoms, such as insomnia, lethargy, obesity, mental disorder, and cardiovascular disorder, will occur in the circumstances of excessive stress. In order to measure, manage, and transmit data simply and quickly via the only smartphone, the system for the quantitative analysis of cortisol by a smartphone linked with own lateral flow assay is built for the Point-of-care-testing (POCT) while the previous cortisol measurement and analysis are slow and complicated due to the small molecules of cortisol. Our system is composed of a smartphone, its holder, and stress sensor. First of all, in the case of the stress sensor, red color appears when conjugated with the antibody fixed on the strip through the sandwich assay reaction, and intensity of color appearance depends on the concentration of cortisol.
Choi, Suji,Kim, Jaeyun The Royal Society of Chemistry 2015 Journal of Materials Chemistry B Vol.3 No.8
<P>Super-stiff, anisotropic hybrid hydrogels were prepared <I>via</I> a linear remodeling of highly stretchable alginate/polyacrylamide hydrogel networks followed by a secondary cross-linking. The elastic modulus of the hybrid hydrogels was successfully controlled by the degree of stretch, polymer composition, and crosslinking cations.</P>
Choi Suji,Park Jungmin,Jung Hyein,Jeong Jiwon,Lim Kyungjoon,Shin Sangah 한국영양학회 2024 Nutrition Research and Practice Vol.18 No.2
BACKGROUND/OBJECTIVES The prevalence of hypertension is increasing, and noodles have a high sodium content, so noodle consumption might be associated with a higher prevalence of hypertension. This study aimed to analyze the association between total and types of noodle intake and the risk of hypertension among Korean adults. Subjects aged 40–69 years were selected for this study. SUBJECTS/METHODS This study included 56,580 participants (18,246 men and 38,334 women) aged 40–69 years old from the Health Examinees study. Noodle and nutrient intakes were assessed using the food frequency questionnaire. Hypertension was diagnosed as systolic blood pressure ≥ 140 mmHg and/or diastolic blood pressure ≥ 90 mmHg or antihypertensive medication use. Cox proportional hazard models were used to calculate the hazard ratio (HR) and 95% confidence interval (CI) for hypertension. RESULTS Higher noodle consumption was associated with increased hypertension among men (HR, 1.273; 95% CI, 1.166–1.390) and women (HR, 1.116; 95% CI, 1.038–1.199). CONCLUSION We recommended reducing noodle intake and consuming vegetables and fruits to increase potassium intake, which can prevent vascular diseases.