• Journal of Technologic Dentistry
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• v.8 no.1
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• pp.37-43
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• 1986

The purpose of this study is to evalute the effects of melting and casting procedures on the castability of some N-Cr and Ag-Pd alloys. One Ag-Pd alloy and two Ni-Cr alloys were chosen for study, and the first casting group of these alloys were used as the control, and with which the castability of the first recase group and the mixture group of the first recast and as much amount of the first casting alloy was compared. The results of this study were as follows: 1. The castability of the first recast alloys veried significantly depending upon the presence or abscence of the first casting alloy and the kind of alloys. 2. When the first recast alloy was mixed with as much amount of the first casting alloy, there was no significant difference in castabilityh between the first recast group and the first casting group. 3. When the first recast alloy was used alone, the castability veried significantly depending upon the kind of alloys, i.e., the castability of Rexillium III and Palliag M was decreased significantly when compared with that of the first casting groups, while that of C & B Alloy was not.

• Journal of Korean society of Dental Hygiene
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• v.10 no.4
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• pp.683-693
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• 2010

Objectives : The purpose of this study was to examine the relation between stress and temporomandibular disorder(TMD) of first the child. Methods : 500(the first child -250, non first child -250) high school students living in Jecheon city, form November 4th to 5th 2009, were the subjects of this questionnaire. The questionnaire was made up of three contests: sociodemographic characteristic, symptom & dysfunction of TMD and stress of high school students. The data were analyzed by chi-square test, two sample t-test and Pearson correlation. Results : Only 443(the first child -209, non first child - 234) students were evaluated due to inadequate responses. The obtain results was as follow. 1. Subjective symptom of TMD reported by 443 students were joint sound(63.5%), pain on chewing(55.1%), pain on opening the mouth(55.1%). 2. Analysis of subjective symptom of TMD showed the first child group was statistical significantly higher on joint sounds and TMJ pain than non first child group(<0.05). 3. Analysis of bad habit and dysfunction showed the first child group was statistical significantly higher on clenching of the teeth, difficulties of bite, headache than non first child group(<0.05). 4. Analysis of stress showed the first child group was statistical significantly higher on stress with parents than non first child. especially on marks and disagreement(<0.05). 5. Stress were partly related to subject symptom of TMD(<0.05, <0.01). 6. Analysis of relation stress and bad habit & dysfunction showed stress were partly related to bad habit & dysfunction(<0.05, <0.01). 7. bad habit were partly related to TMD(<0.05, <0.01). Conclusions : The first child stress and symptom of TMD were higher than non-first child, also stress and symptom of TMD was positively associated. therefore management of the first child' stress is necessary and related study is necessary in the future.

• The Korean Journal of Nuclear Medicine
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• v.18 no.2
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• pp.71-76
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• 1984

• International Journal of Contents
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• v.7 no.3
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• pp.65-70
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• 2011

This research, by analyzing the current first aid education status in K district, Seoul and comparing first aid education systems in other developed countries, introduces the need of first aid/Cardio Pulmonary Resuscitation(CPR) education with Automated External Defibrillator(AED) usage to high school students, who are on the verge of becoming adults. The thorough research shows that schoolsshould be appointed as mandatory facilities for AEDs by laws and execute first aid education to their students. Only through organized and consistent first aid education would the students develop into true volunteers who not only have altruistic minds, but the ability to fluently adapt to medical emergency and properly use AED. In addition, the research also outlines various laws that could be legislated such as having to master the basic degrees of first aid education before getting driver's license and graduating high school so that more people become aware of first aid.

• Journal of Bio-Environment Control
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• v.15 no.2
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• pp.173-176
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• 2006

The relationship between source leaf position and photo-assimilate translocation and distribution was characterized for tomato (Lycopersicon esculentum Mill) grown in the greenhouse. Three different positions of source leaf on the stem (first node above or below the first fruit cluster and $5^{th}$ node above the first fruit cluster) were tested for their influence on $^{14}CO_2$ assimilation and transfer to different parts of the plant. The leaves at the $5^{th}$ node above the first fruit cluster transferred the highest (57%) proportion of $C^{14}$ to other plant parts, followed by leaves home on the first node below the first fruit cluster (50%), and the first node above the first fruit cluster (39%). In all treatments, fruits served as the strongest sink for $C^{14}$, followed by stem, leaf, and root tissues. The leaf home on the $5^{th}$ node above the first fruit cluster transferred the largest amount of $C^{14}$ to the second fruit cluster.

• The Research Journal of the Costume Culture
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• v.7 no.4
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• pp.38-51
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• 1999

The purpose of this study finds that (1) history of the First birthday rite(첫돌 의례) and (2) changing process of the First birthday\`s dress and ornaments(첫돌 복식). The results of this study are as follows. The history of the first birthday rite has been continued vary long years in Korea, but it\`s origin is not clearness. The purpose and form of the first birthday rite are vary similarity in China and Korea. The rate of infant mortality was regarded that an absolute element of the first birthday rite. Making process of the first birthday\`s dress and ornaments was not definite, The adoption of that\`s form and elements act on affect local·homely·individual situation. First birthday\`s dress and ornaments was changed by changing process and convert of recognition about First birthday rite. It shows that the change of rites clothing contacted with changing process of rites.

• Journal of Korean Foot and Ankle Society
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• v.18 no.2
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• pp.43-47
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• 2014

Hallux valgus is a lateral deviation of the first phalanx and medial deviation of the first metatarsal at the first metatarsophalangeal (MP) joint. Its incidence has increased due to developing footwear. The etiologies include fashion footwear, genetic causes, anatomical abnormality around the foot, rheumatoid arthritis, and neuromuscular disorders. Physiologic alignment of the first MP joint is maintained by congruent and symmetric alignment of the articular surface of the first proximal phalanx and first metatarsal head, physiologic relationship of the distal first metatarsal articular surface and the first metatarsal shaft axis, and stable balance of soft tissue around the first MP joint and stable tarsometatarsal joint. Several factors have been associated with hallux valgus, including pes planus, hypermobility of the first tarsometatarsal joint, flattened shape of the first metatarsal head, increased distal metatarsal articular angle, and deformation of the medial capsular integrity. History and physical examination are very important to diagnosis of hallux valgus. Simple radiography provides information on deformity, particularly in weight-bearing anteroposterior and lateral radiographs. Understanding the etiologies and pathophysiology is very important for success in treatment of patients with hallux valgus.

• Korean Journal of Human Ecology
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• v.10 no.2
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• pp.225-235
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• 2001

The purpose of this study is to find out the changes for the first birthday's costume in westernizing Korea society of the twentieth century. For this study, I analysed the related literature for the first half the twentieth century due to the lack of relevant photographs, while I used the method of content analysis of 136 photographs for the second half of the twentieth century. According to the analysis of photographs, first birthday's costume for girls dressed up was more different than those for boys. But first birthday's costume items for boys were more than those for girls. Generally first birthday's costume consists of Bokkon Jeonbok Jeogori(Sackdong) and Baji for boy's, Chima and SackdongJeogori for girl's. Because the meanings and look of Hogun, Durumagi, Sagusam, Busun and Baeza are good, those items might be to used for first birthday's costume in the future. To establish better first birthday's culture and costume in Korea, it is important to educate people involved in related business for traditional costume. Because most of first birthday's costume are usually borrowed for photographs. Also item and design for the first birthday's costume should be studied in order to improve traditional cultural products.

• Journal of the East Asian Society of Dietary Life
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• v.20 no.1
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• pp.166-174
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• 2010

It is widely accepted that there are first mover advantages in various existing industries. However, few studies have been conducted to evaluate the first mover advantages shown in the foodservice industry, whether first movers practically have first mover advantages, and what effects these advantages have on foodservice enterprises. Specifically this study was designed to identify the relationship between first mover advantages and business performance in the foodservice industry. To accomplish this, questionnaires were sent to and collected from selected first movers consisting of 70 foodservice franchised enterprises. SPSS 15.0 was then employed to conduct factor analysis, reliability analysis, correlation analysis, and regression analysis. The analyses revealed that the franchised foodservice enterprises could provide several strategies that enabled them to grow quickly and to establish more shops in their market. In addition, having a greater number of shops resulted in greater advantages when compared to their competitors. Moreover, the advantages of first movers had a significant effect on their business performance. Taken together, these findings imply that if foodservice enterprises franchise their business as early as possible, they can more easily preoccupy their market and enjoy more first mover advantages. This study is meaningful and differentiated from existing studies in that it investigated first mover advantages of the foodservice enterprises in the appropriate industry.

• Structural Engineering and Mechanics
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• v.47 no.6
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• pp.791-818
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• 2013

The seismic performance of reinforced concrete (RC) frame structures with irregularities leading to soft first floor is studied using capacity assessment procedures. The soft first story effect is investigated for the cases: (i) slab-column connections without beams at the first floor, (ii) tall first story height and (iii) pilotis type building (open ground story). The effects of the first floor irregularity on the RC frame structure performance stages at global and local level (limit states) are investigated. Assessment based on the Capacity Spectrum Method (ATC-40) and on the Coefficient Method (FEMA 356) is also examined. Results in terms of failure modes, capacity curves, interstory drifts, ductility requirements and infills behaviour are presented. From the results it can be deduced that the global capacity of the structures is decreased due to the considered first floor morphology irregularities in comparison to the capacities of the regular structure. An increase of the demands for interstory drift is observed at the first floor level due to the considered irregularities while the open ground floor structure (pilotis type) led to even higher values of interstory drift demands at the first story. In the cases of tall first story and slab-column connections without beams soft-story mechanisms have also been observed at the first floor. Rotational criteria (EC8-part3) showed that the structure with slab-column connections without beams exhibited the most critical response.