• Journal of Radiation Protection and Research
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• v.28 no.4
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• pp.327-335
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• 2003

The commercially available neutron survey meter, the REM500, which uses a tissue equivalent proportional counter (TEPC) and the self-constructed TEPC were used to determine the microdosimetric quantities of several neutron calibration fields at Korea Atomic Energy Research Institute (KAERI). Microdosimetric spectra, absorbed dose, dose equivalent as well as quality factor were derived and compared with several neutron fields which were produced by using the shadow objects to make neutron scattered and being used as a kind of realistic neutron calibration fields at KAERI. The response of REM500 as a function of mean energy was evaluated with these neutron fields using the counts measured and the predetermined reference value. The response of the self-made TEPC and the REM500 was compared using one of the neutron calibration filelds of a $^{252}Cf$ source. The reference quantities of scattered neutron calibration fields were determined using a Bonner Sphere (BS). The value of frequency-mean lineal energy, dose-mean lineal energy and quality factor of two $^{252}Cf$ sources (unmoderated and $D_2O$ moderated) were determined to check the differences in the reference neutron fields between KAERI and Pacific Northwest National Laboratory (PNNL, USA) and the results were in good agreement within 1%. It means that there is no big difference in dosimetric quantifies of neutron calibration fields of two laboratories.

• Structural Engineering and Mechanics
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• v.60 no.5
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• pp.809-828
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• 2016

In deep open pit mines, slope stability is very important. Particularly, increasing the depths increase the risks in mines having weak rock mass. Blasting operations in this type of open pits may have a negative impact on slope stability. Several or combination of methods can be used in order to enable better analysis in this type of deep open-pit mines. Numerical modeling is one of these options. Many complex problems can be integrated into numerical methods at the same time and analysis, solutions can be performed on a single model. Rock failure criterions and rock models are used in numerical modeling. Hoek-Brown and Mohr-Coulomb terms are the two most commonly used rock failure conditions. In this study, mine planning and discontinuity conditions of a lignite mine facing two big landslides previously, has been investigated. Moreover, the presence of some damage before starting the study was identified in surrounding structures. The primary research of this study is on slope study. In slope stability analysis, numerical modeling methods with Hoek-Brown and Mohr-Coulomb failure criterions were used separately. Preparing the input data to the numerical model, the outcomes of patented-blast vibration minimization method, developed by co-author was used. The analysis showed that, the model prepared by applying Hoek-Brown failure criterion, failed in the stage of 10. However, the model prepared by using Mohr-Coulomb failure criterion did not fail even in the stage 17. Examining the full research field, there has been ongoing production in this mine without any failure and damage to surface structures.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.3 no.4
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• pp.73-80
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• 2004

A dual purpose robot automation system is developed for both arc welding and spot welding by one robot within a cell. The need for automation of both arc welding and spot welding processes is urgent while the production volume is not so big as to accommodate separate station for the two processes. Also, space is too narrow for separate station to be settled down in the factory. A spot welding robot is chosen and the function for arc welding are implemented in-house at cost of advanced functions. For the spot welding, a single pole type gun is used and the robot has to push down the plate to be welded, which causes the robot positioning error. Therefore, position error compensation algorithm is developed. The basic functions for the arc welding processes are implemented using the digital I/O board of robot controller, PLC, and A/D conversion PCB. The weaving pattern is taught in meticulously by manual teach. A fixture unit is also developed for dual purpose. The main aspects of the system is presented in this paper especially in the design and implementation procedure. The signal diagrams and sequence logic diagrams are also included. The outcome of the dual purpose welding cell is the increased productivity and good production stability which is indispensable for production volume prediction. Also, it leads to reduction of manufacturing lead time.

• Proceedings of the Korea Society of Costume Conference
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• 2001.08a
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• pp.81-81
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• 2001

R.O.C. has experienced successively the development of previous dynasties that creates out the unique traditional culture of each stage. The Chinese nation is not a one-fold race; each dynasty absorbs the culture of the outside race. It is Tang Dynasty blends mutually however yield unusually brilliant results. The Tang Dynasty's national strength is forceful and the economy is prosperous. Above all, social custom and current of thought both break the constraint of previous dynasties' conservative thinking and keep positive and aggressive. While in the contact with extraterritorial culture, not only changes the feminine social status, but also produces unprecedented innovation and reform on the feminine dress. The Tang Dynasty's varied feminine suit is affected by the western regions of China culture, such as expose of chest, low collar, short top garment and skirt with narrow sleeves or wide sleeves, sleeve gown with plate collar or turndown collar, man's wear, and military dress, etc. An epoch can be known by Tang Dynasty feminine dress's special features, for example, the make-up of Tang-Shien-lon's Uan-Ho period presents dress style of late Tang days. However, the Chinese people compete mutually pursuing the strange costume, and accepting different cultural incitement This reveals that the changes of popular culture would result in the big transform of the Tang's dress style. This paper studies inherit of Tang Dynasty's culture and east-spread of the western regions of China culture. While understanding the Tang's favor in the western regions of China customs, all follow the western regions of China without exception, such as dance music, painting, dress, food, amusement, etc. Because of emperor's progressive race policy and forgiveness attitude to the foreign tribe that makes Tang Dynasty's feminine dress much easier to accept and blend the special features of the foreign tribe culture. While joined with west culture, and pick the dress's essence of the western regions of China, the original possessed of culture consciousness and esthetic sense improve and create their own dress, as well as enrich more inner part of dress art and the spirit.

• Journal of KIISE:Databases
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• v.35 no.6
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• pp.533-543
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• 2008

With technological advances for storage volume size of a semiconductor memory, USB storage is made as products to support a high capacity storage. Hereby, consumers discard pint-sized USB storages which they already had, or do not use them efficiently. To integrate and unify these pint-sized USB storages as one big USB storage, we proposed Sigma Hub. It can be grouping multiple USB storages, which have each different volume size of memory storage, as logical unity Storage through USB Hub. The proposed Sigma Hub includes Sigma Controller as a core management module to unify the multiple USB storages in transaction level layer. Sigma controller can efficiently control transaction packet in Sigma Hub through a USB Storage-Integration algorithms which ensure an integrity for data read and write processes. Consequently, Sigma Hub enables the use of USB storage that is logical unity.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.20 no.2
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• pp.35-39
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• 2014

One-way degassing valves are designed to allow pressure to be released from an air-tight package while preventing air from getting back into the package. Air, especially the oxygen ($O_2$) portion of air, can have negative effects on the package contents and its freshness. The most common application of the one-way degassing valve is for fresh roasted coffee. Demands of one-way degassing valves have been increasing with the high growth of global coffee market. In this study, we have developed one-way degassing valves for coffee and food packaging using ring type rubber disk, named SP valve. Its quality and performance was verified with test results to be equal with that of global top maker's product, Goglio valve. SP valves showed 820~1200 Pa of opening pressure, 10~50 Pa of closing pressure, 1.2~1.6 L/ min of flow rate. And, the SP valve applicable to ferment food packaging is expected to contribute to globalize Korean traditional food.

• Journal of Korean Society of Transportation
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• v.27 no.6
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• pp.55-67
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• 2009

In Korea, previously implemented road construction project caused a big budget waste due to overestimation of transport demand. There could be reasons for such inaccuracy of transport demand estimation, but the main reasons are: (1) low reliability of used basic road transport data and (2) inadequate sharing of data among agencies/departments. The National Transport Database and the Household Travel Database in Seoul Metropolitan Area, two representing basic road transport database, will be used to the establishment of a road construction plan that will be promoted afterwards. However, these materials have problems such as low reliability and inadequateness, too. Hence, focusing on transport demand estimation related databases, this paper will make proposals for enhancing their reliability and data sharing.

• Fashion & Textile Research Journal
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• v.10 no.6
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• pp.955-965
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• 2008

This study used the method that measure the participants' responds on the experiment, and the measurement means is a survey. The primary factor plan is $5{\times}2{\times}3{\times}2$. The independent variable are neckline(5), trousers or skirt style(2), somatotype(3), culture(2), and the dependant variables are physical visual effect and the favor of clothe design. In cases of Korean, thin somatotype had better were V-neckline suit for looking shoulders wide because they have too narrow shoulders, and were pants suit than skirt suit for looking pelvis major. thin somatotype person who wants to look tall should wear china collar or tailored collar suit with pants. If she wears round neckline suit with skirt, the lower part of body and the height look tall. Pants suit with V neckline and skirt suit with china collar make standard somatotype looked having wide shoulders. Standard somatotype person with wide shoulder should avoid this style. The size of waist and pelvis was looked thick in round neckline and was looked thin in V neckline. So it will be better to find the right suit for one's weakness. Obesity had better wear V neckline to look neck slim and not wear stand and tailored collar. When obesity person wears pants suit, she is looked having slim waist than skirt suit. In case of American, thin somatotype in pants suit looks much taller than in skirt suit when she wears round neckline and stand collar suit. Standard somatotype has no difference because it is the basic shapes. Generally, it goes with all kinds of suit design. The belly and pelvis of American's obesity look fatter and bigger than Korean's obesity. The same with Korean, round neckline suit makes obesity looked belly and pelvis fat and big.

• Korean Journal of Soil Science and Fertilizer
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• v.15 no.2
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• pp.89-94
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• 1982

1. Solubility diagram was used to estimate Chemical form of the Soil phosphates which supply phosphorus into soil solutions under submerged condition with soils originated from granite and basalt rocks. The granite origin soils with different amounts of available phosphorus have no effect of phosphate application on rice yield, while the basalt origin soil has the big effect. 2. Almost same pattern of change in pH and concentrations of phosphorus and cations in the soil solutions during the submerging period was. shown. Almost no difference in the values was recognized between NPK and NK treatments of the granite origin soils, but the difference of the basalt origin soil was recognized. 3. it was estimated from solubility diagram that phosphorus concentration in the soil solutions was governed by phosphate applied and variscite in the soils for the early stage of submerging period, and then it became to be governed by vivianite in the soils.

• Journal of the Korean Society of Tobacco Science
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• v.29 no.2
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• pp.98-103
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• 2007

This study compares menthol migration from fillers to filters and mainstream smoke in a type of leaf tobacco and according to the moisture content differences at the range of $11{\sim}15\;%$. The leaf tobacco used in this study consisted of Korea flue cured upper leaves B1O (KFUB1), A40R (KFUA4), lower leaves C1L (KFLC1), CD4L (KFLCD4), burley upper leaves A3T (KBUA3), lower leaves D3W (KBLD3), Orient Basma I/III (OB), Orient Izmir BIG (OI), expanded tobacco (KET), and reconstituted sheet (KRC). Menthol migration to the filter and mainstream was measured under constant conditions for 80 days with intervals of 20 days. In the comparison between flue cured types, there were significant differences in the filter parts, as follows. KFUB1(34.4 %) KFUA4(37.4 %), KFLC1(43 %) and KFLCD4 were 55.7 %. In the comparision between other types of leaf tobaccos, KFUB1 was 34.4 % and KET was 52.6 % at filter parts. In the methol transfer to mainstream smoke was $16.5{\sim}24.2\;%$. The menthol migration to filters was measured based on the moisture content of $11{\sim}15\;%$ for the KFUB1 after storing it for 80 days. The menthol migrations were $36{\sim}40\;%$ at the moisture content of $11{\sim}15\;%$, respectively. The transfers to mainstream smoke were $12.8{\sim}15.8\;%$.