• Applied Chemistry for Engineering
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• v.27 no.5
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• pp.551-554
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• 2016

Silver particles were synthesized by chemical reduction with ionic liquids. Structure of silver particles were significantly affected by the cation parts of the ionic liquids. With increasing the length of the cation part, the smaller silver particles were formed regardless of the anion type. This is mainly attributed to the different stability of the ionic liquid structure formed by physical bond between cation parts. Among seven ionic liquids, [Omim][$PF_6$] was the most effective for synthesizing silver particles.

• Journal of Sensor Science and Technology
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• v.13 no.6
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• pp.430-435
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• 2004

The resolution of the accelerometer, fabricated with MEMS technology is mainly affected by mechanical and electrical noise. To reduce mechanical noise, we have to increase mass of the structure part and quality factor related with the degree of vacuum packaging. On the other hand, to increase mass of the structure part, the thickness of the structure must be increased and ICP-RIE is used to fabricate the high aspect ratio structure. At this time, footing effect make the sensitivity of the accelerometer decreasing. This paper presents a hybrid SOG(Silicon On Glass) Process to fabricate a lateral silicon accelerometer with differential capacitance sensing scheme which has been designed and simulated. Using hybrid SOG Process, we could make it a real to increase the structural thickness and to prevent the footing effect by deposition of metal layer at the bottom of the structure. Moreover, we bonded glass wafer to structure wafer anodically, so we could realize the vacuum packaging at wafer level. Through this way, we could have an idea of controlling of quality factor.

• Journal of the Korean Home Economics Association
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• v.44 no.8
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• pp.13-21
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• 2006

The objective of this study was to investigate the fit preference for ready-to-wear clothes(jackets and slacks) of adult men and to determine the respective differences by the age range and obesity level. The study method was a questionnaire survey with 465 male subjects aged from 20 to 59 years old. The questionnaire was composed of fit preference tendency, physical measurements, age, and occupation. The findings were as follows. 1. Regarding the fit preferred for each part of jackets and slacks, among ready-to-wears, the 'thing with some extra width' in every part was most favored, followed by the 'thing fitting perfectly'. 2. Differences were found in the fit preference tendency by the age of adult men. The fit preference tendency was higher among those in their 20's than among those of the other age ranges. 3. Differences were also found in the fit preference tendency by the obesity level of adult men. The fit preference tendency was higher in the order of the emaciation, normalcy, and obesity types. 4. The fit preference tendency was more affected by age than by obesity level. Clothing companies should consider ease to offer the proper clothing desired by consumers.

• Journal of Korean Elementary Science Education
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• v.29 no.2
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• pp.124-133
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• 2010

The study presents preliminary research on how science activities focusing on problem recognition worked and affected students' perception of their learning environment in a sixth science classroom. The science activities were based on the Science Writing Heuristic (SWH) which was suggested by Keys, Hand, Prain & Collins (1999), where problem recognition was an important part of scientific inquiry. For developing the working sheets for the modified SWH in this study, analyses of target units of 6th grade science curriculum in the aspects of problem recognition were conducted. After consecutive 6 classes with the developed working sheets for sixth graders, the student working sheets for each lesson were collected and analyzed. In order to investigate the developed units' affect on student learning, students' perceptions of their learning environment were administered before and after the applied classes. Students working sheets and questionnaires on their perceptions of learning environment indicated that students perceived that the science activities were more student-centered classes where students had active discussion and dialogue with one another giving them more chances to actively take part in the class as well as they used more properly recognized their inquiry problem.

• Journal of Electrical Engineering and Technology
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• v.13 no.2
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• pp.892-901
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• 2018

Because of excellent electrical properties, epoxy resin is widely used in packaging and casting power equipment. Moisture and temperature in the environment are inclined to seriously affect the insulation tolerance of epoxy resin. This work focuses on the aging characteristics of epoxy resin in hygrothermal environment. Scanning electron microscopy images show that there are micro-crack, micro-slit and holes inside aged samples. The moisture absorption process undergoes three equilibrium stages and it does not follow the Fick's second law. Observing the change of hydrogen bonds in the infrared spectra of the dried samples, it is found that chemically moisture absorption immerges when the physical moisture absorption entered the third equilibrium stage. By Debye equation to fit the imaginary part of the dielectric constant, it is concluded that the uniformity of water molecule has a great influence on the electrical conductivity loss. Furthermore, the polarization loss can be more easily affected by water molecules than small free molecules. After the aged samples being dried, their real and imaginary part of the dielectric constant descend, but their original electrical properties cannot completely restored. After chemical moisture absorption appears inside the material, the residual space charges increase significantly and the charge dissipation rate slow down obviously.

• Journal of Haehwa Medicine
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• v.16 no.2
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• pp.281-288
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• 2007

Tremor is a rhythmic, involuntary muscular contraction characterized by oscillations (to-and-fro movements) of a part of the body. Essential tremor is a 6-8 Hz tremor that is of variable amplitude. It is aggravated by posture and movement and relieved by rest and alcohol. Most affected part are the arms, head and vocal apparatus. The purpose of this study is to show a case of tremor patient with essential tremor improved by oriental medical treatment. The patient was 71-year-old woman who featured essential tremor and at the same time complained general body weakness, nausea, and anorexia. She was treated by oriental medicine with acupuncture, herb medication, and Korean psychotherapy; Eejeong-byunki, Jiun-goron. The features of essential tremor was reduced after taking oriental medical therapy. This result suggested that the oriental medical therapy can be effective for treating essential tremor.

• Journal of the East Asian Society of Dietary Life
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• v.24 no.4
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• pp.441-443
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• 2014

Korean traditional fermented milk, Tarak, came down from the Koryo dynasty according to Korean ancient cookbook SoowoonJaabaang, which was written by Taakjunggong, Yoo Kim around AD 1500. Tarak is generally refers to milk or dairy products. Three theories on 'Tarak' revealed in this study are as follows: 1) it has been derived from Dolgwol language, tarak, 2) it has originated in Mongolian language, Topar(tarague), meaning horse's milk and 3) it originated in Tarak mountain located in Hanyang, which was capital of Chosun. In Mongolia, fermented milk has been called as Tarak and it has been called as tar by Yakuts tribe who are nomads in Sakha. The common part, tar, of these words is said to be the term representing the origin of the fermented milk coming from the central Asia. Therefore, Korean Tarak seems to be part of the central Asian culture that flowed into the Korean peninsula. The manufacturing method of Mogolian Topar(tarague) is similar to those of Tarak found in the SoowoonJaabaang. This research revealed that Korean traditional fermented milk, Tarak, is thought to be affected by the central Asia, especially Mongolia.

• Journal of International Society for Simulation Surgery
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• v.1 no.2
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• pp.80-82
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• 2014

Purpose Microtia is congenital anomaly of external ear and the reconstruction method for the external ear of microtia patient was based on autogenous costal cartilage framework. The application of 3D printing technique in medical science has made more possibility of human tissue restoration, and we tried to apply this technique in auricular reconstruction field. Materials and Methods As for unilateral microtia patient, the contralateral side ear is normal and reconstructive surgeon tried to mimic it for reconstruction of affected ear. So, we obtained facial CT scan of microtia patient and made mirror image of normal side ear. Moreover, to make the 3D scaffold based on the mirror image of normal ear and to apply this scaffold for the auricular reconstruction surgery, we included auriculocephalic sulcus and anterior fixation part. Results We could successfully obtain mirror image of normal ear, auriculocephalic sulcus and anterior fixation part for 3D scaffold printing. Conclusions Using this CT image processing and 3D printing technique, we will be able to make the scaffold for auricular reconstruction of unilateral microtia patient, and perform auricular reconstruction in near future.

• Fashion, Industry and Education
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• v.15 no.2
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• pp.1-10
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• 2017

The purposes of this study were to explore (1) how fit reviews differ among height groups and (2) how overall numerical ratings differ depending on height groups and ifferent types of fit reviews. Content analysis was used to analyze systematically sampled online consumer reviews (OCRs) of formalwear dresses rented online. In part 1, 201 OCRs were analyzed to develop the coding scheme, which included three aspects of fit (physical, aesthetic, and functional), valence (negative, neutral, positive), and overall numerical rating. In part 2, 600 OCRs were coded and statistically analyzed. Differences in frequency were not found among height groups for any types of mentions (negative, neutral, and positive) in terms of the three aspects of fit in the OCRs. Differences in overall mean ratings were not found among height groups. Interestingly, valence of each aspect of fit reviews affected mean numeric ratings. This study is new in examining relationships among textual information (i.e., fit reviews), numerical information (i.e., numerical rating), and reviewer's characteristic (i.e., height). The results of this study offered practical implications for etailers and marketers that they should pay attention to the three aspects of fit reviews and monitor garments with negative fit evaluations for lower ratings. They may attempt to increase ratings by providing customers recommendations to get a better fit.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.2
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• pp.347-355
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• 2005

Biodegradability of cotton/polyester blend fabric was investigated employing activated sluge test, soil burial test and enzyme hydrolysis. Surface changes of the degraded sample were observed through a microscopy. Changes in X-ray diffraction patterns and crystallinity were examined using X-ray diffractometer. Experimental results revealed that biodegradability of cotton/polyester blend fabric was proportional to the blending ratio of cotton, not showing any synergy effect. Polyester 100% hardly degraded in this study. Through the comparison of the experimental method it was shown that the biodegradabilities determined from activated sludge test and enzymatic hydrolysis except soil burial test were linearly related to the blending ratio of cotton in the blent fabrics. It is probably because the biodegradability determined from the retention of tensile strength of fabrics buried in soil was affected by the stress distribution of polyesters throughout the fabric. From the microscopic observations it was revealed that fungi were grown on the fabric surface and the colors turned yellow, brown and black. X-ray diffraction patterns showed that the heights of crystalline peak coming from cotton part in blend fabrics decreased whereas those coming from polyester part increased comperatively as time passed by. Crystallinities of cotton 100% fabric increased slightly at the begining and then decreased continuously.