• International Journal of Highway Engineering
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• v.13 no.4
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• pp.103-115
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• 2011

Concrete slab curls and warps due to the uneven distribution of temperature and moisture and as the result, internal stress develops within the slab. Therefore, environmental loads must be considered in addition to the traffic loads to predict the lifespan of the concrete pavement more accurately. The strength of the concrete slab is gradually decreases to a certain level at which fatigue cracking is generated by the repetitive traffic and environmental loadings. In this study, a new fatigue regression model was developed based on the results from previously performed studies. To verify the model, another laboratory flexural fatigue test program which was not used in the model development, was conducted and compared with the predictions of other existing models. Each fatigue model was applied to analysis logic of cumulative fatigue damage of concrete pavement developed in the study. The sensitivity of cumulative fatigue damage calculated by each model was analyzed for the design factors such as slab thickness, joint spacing, complex modulus of subgrade reaction and the load transfer at joints. As the result, the model developed in this study could reflect environmental loading more reasonably by improving other existing models which consider R, minimum/maximum stress ratio.

• Journal of Oral Medicine and Pain
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• v.31 no.2
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• pp.147-154
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• 2006

This paper studies natural head position and orofacial pain. For this study. 27 persons with dental service were selected, we examine head & neck pain, factor affecting pain severity, stress, stressful facial symptom with questionarre and interview. We have photograph for natural head position in front of 5cm posture scale pate. Data obtained were statistically processed by the SPSS Windows program and the results of this study were as follows: 1. There were significant difference from plum line to acromion line, from plum line to tragus line, eye- tragus angle, SCM angle. 2. Between group with head and neck pain and group without head and neck pain, the study shows no significant difference on average NHP measurement and NHP amount. 3. Between group with head and neck pain and group without head and neck pain, the study shows no significant difference on SRRS. 4. In this paper we indicate more stressful symptom in group with head and neck pain than group without head and neck pain. 5. There have no difference in head and neck pain level according to hobby.

• Journal of Oral Medicine and Pain
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• v.20 no.1
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• pp.39-52
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• 1995

Burning mouth syndrome is characterized by a burning sensation in oral cavity without clinical signs. There has b een no established theories about the diagnosis and treatment. The purpose of this article is to examine the clinical feature of BMS patients of Korean and to present a treatment protocol that can be helpful in clinical applications. The subjects chosen for the study were 52 patients who had visited Department of Oral Diagnosis at Yonsei University Dental Hospital and were diagnosed as BMS. We did questionnaires and precise oral exam, laboratory exam, grouping of our patients, individual treatment for the groups and classification of responses to the treatment. The following results were obtained: 1. Chief complaints were throbbing (71.2%), pricking, stinging, tingling (30.8%), burning(25a%). The tongue is the most frequently affected site (82.7%), followed by full mouth, gingiva, palate, buccal mucosa, lips, throat, labial mucosa and floor of mouth. 2. The average age of onset was 48.1 year and the male to female ratio was 1 to 3. The average duration of symptom was 11.69 months for male and 23.07 months for female. 3. 32.7% of patients had appealed continuous pain, which was the most cases. Aggravating factors were peppery food, salty food, hot food, fatigue, tension conversation, sour food, cold food and toothpaste. Reducing factors were cold food, diet, going to sleep and smoking. 4. Associated symptoms were dry mouth, other life problem, altered taste perception, bad taste, throat pain, tingle and difficulty in swallowing. 5. Most of patients had appealed that there was not associated event on onset of symptom, and the order of prevalence is as fallow; dental treatment, stress, denture wearing, an attack of a systemic disease. 92.3% of patient appealed that there was no psychological withering and 7.7% of patients appealed positively. 6. There were eight males and four females that had jobs. 7. There was no family history in 100% of patients in questions about presence of family history. 8. 96.2% of patients appealed that there was no oral habits. 13.5% of patients had dryness of oral mucosa in oral exam. A significant relation to dental prosthesis was not observable, but incidence of diseases due to stress appeared high in BMS which had the clinical characteristics as above. A group having low serum iron was 63.5% and in this group period of potential iron deficiency appeared high in incidence just before move to anemia. A group represented positive response was 38.5% in fungus study for Candida albicans. Since we can expect high treatment response by prescription of iron-contained drug and antifungal drug in these patients, diagnosing patients' condition of BMS can be achieved in more various aspects through study for serum iron and Candida albicans. Furthermore, it is expected that treatment protocol can be made.

• Korean Journal of Environment and Ecology
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• v.27 no.6
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• pp.745-756
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• 2013

This study was carried out to suggest an experimental base to maintain the sustainability of extensive green roof as considering moisture demand by the type of the green roof plant before construction. The changes of soil moisture content, chlorophyll content, coverage of Sedum kamtschaticum and Dianthus chinensis var. senperflorens in two type of perlite soil and mix soil, were investigated under the condition of no rainfall and no irrigation during one month. The result shows that with the increase of stress time, soil moisture content and chlorophyll content on leaf were in a downward trend; After 30 days, Soil moisture content were lowest in 10 cm depth perlite soil system planted Dianthus chinensis. and 20 cm depth mix soil system planted Sedum kamtschaticum had the highest soil moisture. Generally soil moisture contents of soil system planted Dianthus chinensis var. senperflorens were lower than that of soil system planted Sedum kamtschaticum. In 10 cm depth soil system, state of plant growth was better than 20 cm depth soil system both perlite soil and mix soil type. It can be confirmed.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.16 no.1
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• pp.52-56
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• 2016

Propionic acidemia (PA) is a rare autosomal recessive metabolic disease caused by the deficiency of propionyl-CoA carboxylase (PCC). PA affects the catabolism of branched chain amino acid and oddchain fatty acid then results in accumulation of propionic acid and other metabolites in plasma and urine. Catabolic stress such as infection, illness or any stress can precipitate cause acute metabolic decompensation, especially in the first years of life. Acute metabolic decompensation commonly calls for emergency treatment or admission and if the patient is in a serious condition, it can lead to coma or death. But frequent admissions or visiting the emergency room are much burden to the patients and their kins. And we experienced the propionic academia with a confirmed novel mutation and the patient suffered from frequent admission and visiting the emergency room. So, we tried the regular home carebased fluid therapy after securing a central venous line. Finally, we succeeded in preventing frequent admissions resulted from acute metabolic decompensation and could contribute to relieving the burden to the patient and their family.

• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.297-305
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• 2013

This thesis is a result of a study of the treatment course of post traumatic stress disorder because of the historical incident which is described in the novel, Uncle Suni by Hyun Ki-young. Uncle Suni survived the massacre which happened during the 4.3 Incident in Jeju Island. However, living a buried life, she suffers a historical trauma. To cure her disorder, she had to know the cause of her illness, such as auditory hallucination, mysophobia, etc. The author describes that kinds of patients should be ensured to get help not only in duty of the society but of the country and that historical justice should stand right. Uncle Suni reexperienced the incident when she happened to discover 'the white bones' and 'the lead bullets' while she was working in her 'Ohmpang field'. To cure her illness, she needed to confess her guilt that she had escaped from the massacre, and deep appreciation about the incident, which means she had to testify, and in the course of the testimony, she had to confess her inner feelings. To solve the historical trauma, there should be a recovery of connection between the patient and the society. The course of treatment should go from the patient herself to the realm of the society through which the patient, Uncle Suni can reach the recovery.

• Korean Journal of Environmental Agriculture
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• v.20 no.2
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• pp.93-98
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• 2001

A chilling-tolerant japonica-type and a chilling-susceptible indica-type of rice (Oryza sativa L.) plants were compared with respect to various physiological parameters during chilling and subsequent recovery. The japonica-type and the indica-type of rice cultivars used were Ilpumbyeo and Taebaekbyeo, respectively. The two rice cultivars exhibited little or no differences in the changes of leaf fresh weight and chlorophyll content during chilling at $5^{\circ}C$ for 3 days. During subsequent recovery at $25^{\circ}C$, however, Ilpumbyeo restored its growth more rapidly than Taebaekbyeo. Since the changes of relative water content, malondialdehyde production, an estimate of lipid peroxidation, and chlorophyll fluorescence were significantly different in the two rice cultivars during the chilling and subsequent recovery, they were found to be more sensitive physiological parameters than fresh weight and chlorophyll content. However, the differences in relation to water content, malondialdehyde production, and chlorophyll fluorescence between the two rice cultivars were smaller during chilling than those during subsequent recovery. These results suggest that relative water content, malondialdehyde production, and chlorophyll fluorescence could widely be used as important physiological parameters for screening chilling-tolerant plants.

• Journal of Oriental Neuropsychiatry
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• v.21 no.4
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• pp.219-231
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• 2010

Objectives : School refusal is usually considered as individual's behavioral problem. These days. however. the adolescents' school refusal needs some kind of medical approaches because it is related to mental disorder of the adolescents. Due to too much pressure and stress from the competition between classmates and from good performance in school. the number of adolescents who refuse to go to school is increasing. Despite this circumstance. school refusal is neither regarded as a single independent disorder nor endorsed as an officially classified disease. which makes difficult to conduct research on this issue and to establish standardized treatment for it. In addition. there is a lack of research on this topic. especially in oriental medicine. so there is no a case report or study on school refusal. This study is trying to comment on school refusal from the perspective of oriental medicine. Methods : We tried to examine the effect of oriental medicine treatment for school refusal with four adolescent cases. The patients commonly have at least more than one mental disorder (including depression disorder. anxiety disorder. and anorexia nervosa). have some problem with the relationship with their family. in particular with mother. do not have father or not be loved by their father. and have irregular eating habits. Thus. we diagnosed them as qi transforming into fire (氣鬱化矢) spleen-stomach deficiency cold (脾胃虛寒) and heart blood deficiency (心血虛) due to stress from the family issues and unhealthy eating habits. The patients received supportive therapy. family therapy. etc among many oriental mental treatments and their progress had been observed through hospitalization and outpatient treatment. Results : All four cases were reported positive progress on their symptoms and started coming back to school. We also examined whether they were well fitting into the school while they received outpatient treatment. and the results show that all four patients continue to settle down in normal school life. Conclusions : This study closely reviewed the mental disorder of school refusal cases and showed that the Oriental medical treatment was effective in helping the patients come back to school. More future research is required to better treatment for school refusal cases in oriental medicine.

• Journal of the Korean Vacuum Society
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• v.21 no.6
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• pp.328-332
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• 2012

The work function of Ag (silver) is too low (~4.3 eV) to be used as an electrode of T-OLED (Top Emission Organic Light Emitting Diode). To solve this weakness, researches used plasma-, UV-, or thermal treatment on Ag films in order to increase the work function (~5.0 eV). So, most of studies have focused only on the work function of various treated Ag films, but studies focusing on nanomechanical properties were very important to investigate the efficiency and life time of T-OLED etc. In this paper, we focused on the mechanical properties of the Ag and $AgO_x$ film. The Ag was deposited on a glass substrate with the thickness of 150 nm by using rf-magnetron sputter with the power was fixed at 100 W and working pressure was 3 mTorr. The deposited Ag film was UV treated by UV lamp for several minutes (0~9 min). We measured the sheet resistance and mechanical property of the deposited film. From the experimental result, there were some differences of the sheet resistance and surface hardness of Ag thin film between short time (0~3 min) and long time UV treatment. These result presumed that the induced stress was taken place by the surface oxidation after UV treatment.

• Journal of Plant Biotechnology
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• v.40 no.3
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• pp.156-162
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• 2013

Plant tolerance to drought is a beneficial trait for stabilizing crop productivity under water deficits. Here we report that genetically engineered Chinese cabbage expressing Arabidopsis $H^+$-pyrophosphatase (AVP1) shows enhanced physiological parameters related to drought tolerance. In comparison with wild type plants under soil water deficit stress created by cessation of irrigation, soil water potential in pot with AVP1-expressing plants was more rapidly decreased that might lead to increased relative water content in leaves, while both genotypes had indistinguishable wilting phenotypes. Transgenic plants subjected to drought treatment also exhibited higher photosystem II quantum yield in addition to lower electrolyte leakage and $H_2O_2-3,3^{\prime}$-diaminobenzidine content when compared to wild type plants.