• Women's Health Nursing
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• v.6 no.4
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• pp.477-492
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• 2000

The purposes of this study were 1) to identify incidence, severity and duration of morning sickness; 2) to explore the diet relieving nausea; and 3) the demographic factors related to morning sickness. The data were collected on 281 pregnant women by the questionnaire comprized of demographic variables, obstetric characteristics, and pattern of morning sickness from 6 weeks gestational period to 30 weeks, who visited prenatal clinic of three general hospitals and a public health center in Seoul. The data were analyzed with descriptive statistics and $x^2$ test, using the program of SPSS/WIN 8.0. The results were as follows; 1. Incidence of morning sickness comprised of 72.3% pregnant women. Occurrence of morning sickness was gestational mean of 5.93 weeks, and morning sickness ceased after gestational mean of 14.62 weeks. 2. Of those women who experienced morning sickness 27.9% had morning sickness in the morning and 19.7% in the afternoon, and 45.3% had morning sickness for 1 hour in duration and 19.2% throughout the entire day. 3. Of those pregnant women 51.2% had moderate discomfort and 33.5% had severe discomfort in morning sickness. The situations that triggered morning sickness were 'hunger' for 32.9%, 'smell' for 30.3%, and 'cooking' for 23.3%. 4. The affects of morning sickness to lifestyle were 'moderate change' for 39.9%, 'mild change' for 33.5%, and 'much change' for 23.6%. 5. To remedy morning sickness 34.6% of pregnant women tried to eat fruits, and 14.8% tried to drink carbonated beverage. The effective foods relieving morning sickness were fruits for 38.4%, carbonated beverage for 15.6% and dry carbohydrate for 12.0% of pregnant women. The ineffective foods relieving it were milk for 31.0% and dry carbohydrate for 23.7% of pregnant women. 6. The level of relieving of morning sickness by diet were 'mild' for 55.7%, 'no change' for 21.7%, and 'moderate' for 17.7% of pregnant women. 7. There was a significant association with morning sickness and age, but no significant associations with morning sickness and parity, educational level, occupation, type of marriage, and type of family.

• Journal of the Ergonomics Society of Korea
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• v.15 no.2
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• pp.37-49
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• 1996

Morningness-Eveningness Questionnaire (MEQ) of Horne & Ostberg(1976) was translated into a Korean version, and MEQ and life habit inventory was administrated with approximately 900 university students. The distribution of MEQ score was normal. Arising time and bedtine for weekdays and holidays came in the order of morning type, intermediate and evening-type. And the deviation for the evening-type was greatest. Also, the deviation of sleep length for the evening-type was greater than the morning- type. There were tendencies that the bed time and arising time of the male were slightly later than those of the female, and the sleep length of the male was a little longer than that of the female. It also appeared that the arising time was later in the male who completed the military services than those who did not in the chronotype. And the sleep length of the non-served male was longer than that of the served one. Such tendencies noticeably appeared especially the evening-type. The evening-type was subject to heavy variability in bedtime. arising time, and sleep length. The sleep latency of the evening- type was longer and mood on arising was worse. And the ratio of nap or light sleep was higher in these subjects than in others. These results suggested that evening-type students had more irregular and/or flexible sleep-wake habits than the morning-type.

• Journal of Korean Academy of Nursing
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• v.40 no.1
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• pp.43-51
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• 2010

Purpose: The purpose of this study was to investigate sleep habits, sleep disturbance, and circadian types, and to identify factors influencing sleep disturbance in nursing students. Methods: Participants were 140 senior nursing students. The data were collected from May 19 to 27, 2008 using self-report questionnaires. Results: 1) Evening type delayed sleep-wake schedules were more frequent than for morning type, especially during weekend and evening shift duty. 2) In total sleep time, there were no significant statistical differences between morning type and evening type during weekdays, weekend, day or evening shift duty. 3) On weekdays and day shift duty, the mean score for sleep disturbance was significantly higher in the evening type compared to the morning type. 4) Sleep disturbance in weekday and day shift duty was influenced by circadian types, eating habits, and gender. Conclusion: The circadian types are a very important factor for determining the sleep quantity and quality in nursing students.

• Journal of the Korean Society of Costume
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• v.52 no.6
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• pp.41-50
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• 2002

The purpose of this study is to classify korean clothing image using brainstorming method. Brainstorming theme is selected 'The Land of Morning Calm 'which famed to foreigner about Korea. Brainstorming members were 10 persons for 1st. 9 persons for End. The 119 words of association from 'morning calm'were to extracted at 1st brainstorming. The group of senses image were to classified at End brainstorming. The results of this study were as follows : 1. The clothing image type of tactual sense implied feeling of that downy bedding in a soft spring and grandmother's hands as warm. rough. 2. The clothing image type of smelling sense associated smells of pleasant. mild. and fresh. 3. The clothing image type of auditive sense consisted mainly sense of indirect. resonance. small, and clear sounds. 4. The clothing image type of visual sense associated pure, passive, gentle, and lasting life-force as weeds and wild flowers. Korean line is pointless and rounded curve. Korean form is soft silhouette as streamy, not exaggerate and wavy detail of slim and short. Korean color is not dyed, just natural color and pastel tone. Korean textile is a natural material as linen, ramie. and coarse silk.

• Journal of the Ergonomics Society of Korea
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• v.19 no.3
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• pp.1-12
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• 2000

The Korean version of the morningness-eveningness questionnaire (MEQ) and sleep habits inventory were administered to 1,038 Korean male daytime workers and were analyzed according to age and chronotype to determine what these factors reveal about sleep habits in view of phase difference of circadian rhythm. The mean and distribution of scores on the MEQ moved significantly toward the morning type with aging. Bedtimes and waking times were progressively later from the morning, intermediate, to evening types, and were also earlier with aging. Preferred bedtimes and waking times showed more distinct differences than did the habitual times in each chronotype. The percentage of subjects who answered that sleep length was 'short', mood upon waking was 'bad', and variabilities of bedtime and sleep length were 'large' were greater in the young and evening types than in the elder and morning types, respectively. These findings suggested that subjects were shifted toward the morning type and the phase of circadian rhythm had moved forward with aging. Preferred bedtime and waking time were a better reflection of individual circadian rhythms than habitual bedtime and waking time.

• Journal of the Korean Society of Safety
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• v.20 no.3 s.71
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• pp.188-196
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• 2005

Accident reports from 1991 to 2000 of a steel company were used to analyze which factors induce industrial accidents. The subjects were 8,311 blue-collar workers, who sustained 114 occupational injuries and work on a continuous full-day 3-team 3-shift system of backward rotation(mornings to afternoons to nights). With respect to marital status, the occupational injury rate(OIR) on the married workers was significantly higher compared to unmarried workers. With respect to no, the OIR of those in their early 20s was significantly higher when compared to other age groups. The OIR of highly educated workers showed a reduction when compared with lower educated workers. The OIR of shift workers were significantly higher compared with the daytime workers. The OIR of type of work decreased across the steel manufacturing process, rolling process, machine maintenance section forwarding products section to the field management section. With respect to the block of shift work(morning, afternoon, and night shifts) by the type of work, the OIR of the night shift was higher than those of the morning shift in the steel manufacturing process or forwarding products section. The OIR of the machine maintenance section was slightly higher in the morning shift than those of the night shift. The OIR of the time of day of the shift workers reached a peak between 09:00 and 11:00. The OIR of a slight injury to shift workers decreased across the night, afternoon, to morning shifts whereas the OIR of a serious injury tended to decrease across the night, morning, to afternoon shift. The body parts most commonly injured were the arm and the crus.

• Solar Energy
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• v.5 no.2
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• pp.60-69
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• 1985

A low cost batch type solar heaters (capacity 200 litres) comprising horizontal tanks, which performs the dual function of absorbing heat and storing the heated water, have been designed and fabricated for the purpose of side-by-side testing. Experimental results have indicated that the sufficient hot water can be obtained in the early morning if the glazing is aided by a reflector/insulation cover. The water heater with best thermal performance such as type B supplied water at a maximum mean temperature of $46-49^{\circ}C$ in the summer afternoon and the temperature of $36-39^{\circ}C$ can be obtained in the early morning if insulation cover is used during night time. The equation has been developed for the prediction of hourly variation of the water temperature in the tank.

• Korean Journal of Cognitive Science
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• v.33 no.1
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• pp.51-75
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• 2022

Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation that is able to alter neuronal activity in particular brain regions. Many studies have researched how tDCS modulates neuronal activity and reorganizes neural networks. However it is difficult to conclude the effect of brain stimulation because the studies are heterogeneous with respect to the stimulation parameter as well as individual difference. It is not fully in agreement with the effects of brain stimulation. In particular few studies have researched the reason of variability of brain stimulation in response to time so far. The study investigated individual variability of brain stimulation based on circadian rhythm and chronotype. Participants were divided into two groups which are morning type and evening type. The experiment was conducted by Zoom meeting which is video meeting programs. Participants were sent experiment tool which are Muse(EEG device), tdcs device, cell phone and cell phone holder after manuals for experimental equipment were explained. Participants were required to make a phone in frount of a camera so that experimenter can monitor online EEG data. Two participants who was difficult to use experimental devices experimented in a laboratory setting where experimenter set up devices. For all participants the accuracy of 98% was achieved by SVM using leave one out cross validation in classification in the the effects of morning stimulation and the evening stimulation. For morning type, the accuracy of 92% and 96% was achieved in classification in the morning stimulation and the evening stimulation. For evening type, it was 94% accuracy in classification for the effect of brain stimulation in the morning and the evening. Feature importance was different both in classification in the morning stimulation and the evening stimulation for morning type and evening type. Results indicated that the effect of brain stimulation can be explained with brain state and trait. Our study results noted that the tDCS protocol for target state is manipulated by individual differences as well as target state.

• Sleep Medicine and Psychophysiology
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• v.1 no.1
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• pp.47-59
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• 1994

Objectives: The main purpose of this study was to investigate the possible differences in sleepiness, performance, and body temperature during the night between morning(M) and evening(E) type subjects. Methods: After a survey study, to verify the validity and reliability of the Korean translation of the Home' and $\ddot{O}stberg's$ Morningness-Eveningness Questionnaire(1976), 8 extreme M-type subjects(3males, 5 females) and 8 extreme E-type subjects(3 males, 5 females) were selected from the university student population who had participated in the survey study. All subjects underwent sleep latency test and a battery of performance tests at intervals of 2 hours through the night, from 23:00 to 07:00. Oral temperature of each subject was taken every hour from 21 : 00 to 8 : 00. Between the testing times, the experimenters ensured that subjects remained awake. Results: More profound sleepiness was found in the M-type compared to the E-type throughout the night, with significant differences in sleepiness occuring at 23:00 and 01:00 hours. Overall performance efficiency tended to be lower through, the night in the M-type than in the E-type on all tests. A difference in time of temperature minimum between the two types was not noteworthy. Rather, there appeared to be a substantial difference in temperature level during the declining phase, with the temperature of the M-type being lower than that of the E-type. Conclusions: These results indicate the existance of a temporal relationship between sleepiness, perfonnance and body temperature during night work. Since the M-type exhibited greater sleepiness and lower performance efficiency overnight than the E-type, it may be assumed that the E-type is more suitable for and tolerable to night work. There was some discussion of the limitations in generalizing these results together with some suggestions for future studies.

• The Journal of the Korea Contents Association
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• v.20 no.8
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• pp.327-337
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• 2020

This work was researched by practical methodology in-depth study of a subjectivity dimension study, in sloughing away a past habituation of functional quantity analysis on perception-effectivity and a habit of dietary life for effective health-promotion. The perception patterns be generated from this study were classified into three types in Q-method. They are as follows ; it is that divided into 'I[(n=9) : eating type in morning], II[(n=11) : type of no having a midnight meal], III[(n=9) : type of mealing after taking exercise]'. Like this, it found that is very different type all over. Finally, this paper is to examine an acceptance behavior about reception type on effectiveness and a habit of dietary life for effective health-promotion ; to make a proposal in a developmental and creative opinion about it.