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Operation Model Design of Logistics Industrial estate -Focused on Transportation Network- (물류산업단지의 운영모델 설계 - 운송 네트워크를 중심으로-)

  • Shin, Jae Young;Kim, Woong-Sub
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.06a
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    • pp.214-215
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    • 2013
  • Current competition among companies than regional, the time constraints, it is globalization, Tilt the efforts of many to be operated by building the efficient distribution system to reduce logistics costs and improve customer service it is reality's there. Therefore, the need for industrial complexes environmentally friendly can be cost competitive companies perform cavitation region's increased. To build the distribution center these logistics system through a joint of freight and appropriate policy is required. In particular, efficient operation through the system construction of industrial complexes in the logistics system is very important in terms of friendly low-cost urban logistics, the environment. Since the traffic volume which is Jipufa and utilization of network is transported by a more appropriate technicians and means suitable operating model can efficiency is improved. However, despite these advantages, research network design has not been actively conducted due to the complexity of the problem. Therefore, in this study, by analyzing the logistics system, and presents the operating model through a simulation and basic settings for the model of the logistics complex based on the analysis result, the construction of infrastructure of logistics industry complex it is intended to present the article.

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Mode of Occurrence and Chemical Composition of Electrums from the Gubong Gold-Silver Deposits, Republic of Korea (구봉 금-은광상에서 산출되는 에렉트럼의 산출상태와 화학조성)

  • 유봉철;최선규;이현구
    • Economic and Environmental Geology
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    • v.35 no.3
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    • pp.191-201
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    • 2002
  • The Gubong gold-silver deposits if gold-silver-bearing hydrothermal massive quartz veins which were filled the fractures along fault shear (NE, NW) zones within Precambrian banded or granitic gneiss of Gyeonggi massif. Ore mineralization of this deposits is contained within a single stage of quartz vein which was formed by multiple episodes of fracturing and healing. Ore minerals are comported mainly of arsenopyrite, pyrite, sphalerite, chalcopyrite, galena with minor amounts of pyrrhotite, marcasite and electrum. The frequency and volume percentages of electrum associated with ore minerals from this deposits are recognized as follows; 44.5% and 54.3% with arsenopyrite, 24.3% and 33.8% with quartz, 12.6% and 0.1% with pyrite, 11.0% and 4.8% with galena, 5.0% and 7.0% with sphalerite and 2.5% and 0.02% with chalcopyrite, respectively. They show irregular (41.6%), subround (34.7%), elongate (17.0%) and granular (6.6%) shapes, respectively. Their grain size ranges from 2 to 150 um, but 90.9 percent of the grains are below 30 um. The chemical composition of electrums ranges from 26.39 to 72.51 Au atomic %. These composition (Au atomic %) on the basis of associated minerals are from 44.97 to 71.75 with arsenopyrite, pyrite, sphalerite and quartz, from 44.37 to 72.51 with quartz, from 35.40 to 41.01 with sphalerite and chalcopyrite, from 26.39 to 54.84 with pyrite, chalcopyrite, quartz and galena, from 28.49 to 53.28 with galena, respectively. We suggest that optimum recovery of gold would be obtained with reference to these results.

Clogging Potential in Constructed Vertical Flow Wetlands Employing Different Filter Materials for First-flush Urban Stormwater Runoff Treatment (도시 초기 강우유출수 처리를 위한 수직흐름습지에서 여재별 폐색 잠재성 분석)

  • Chen, Yaoping;Guerra, Heidi B.;Kim, Youngchul
    • Journal of Wetlands Research
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    • v.20 no.3
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    • pp.235-242
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    • 2018
  • The function of vertical subsurface flow wetlands can potentially be reduced with time due to clogging and are often assumed to be occurring when ponding and overflow is observed during rainfall. To investigate their clogging potential, three pilot-scale vertical subsurface flow (VSF) wetland systems were constructed employing woodchip, pumice, and volcanic gravel as main media. The systems received stormwater runoff from a highway bridge for seven months, after which the media were taken out and divided into layers to determine the amount and characteristics of the accumulated clogging matters. Findings revealed that the main clogging mechanism was the deposition of suspended solids. This is followed by the growth of biofilm in the media which is more evident in the wetland employing woodchip. Up to more than 30% of the clogging matter were found in the upper 20 cm of the media suggesting that this layer will need replacement once clogging occurs. Moreover, no signs of clogging were observed in all the wetlands during the operation period even though an estimation of at least 2 months without clogging was calculated. This was attributed to the intermittent loading mode of operation that gave way for the decomposition of organic matters during the resting period and potentially restored the pore volume.

Effect of Detector-Misalignment on TOF-PET Detector Performance (검출기 정렬 오차가 TOF-PET 검출기의 성능에 미치는 영향성 평가)

  • Yang, Jingyu;Kang, Jihoon
    • Journal of the Korean Society of Radiology
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    • v.13 no.6
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    • pp.841-846
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    • 2019
  • Effect of misalignment on the performance was evaluated for the development of time-of-flight(TOF)-PET detector. A pair of TOF-PET detector consists of Lutetium-yttrium oxyorthosilicate(LYSO) scintillation crystal with a volume of 3 mm × 3 mm × 20 mm and Geiger-mode avalanche photodiodes(GAPD) photo-sensor with a active area of 3.07 mm × 3.07 mm. Analog output signals from TOF-PET detector were sent to the pre-amplifier and then fed into the gain adjust circuit for achievement of gain homogeneity for each detector. The amplified signals were recorded and digitized by data acquisition system based on oscilloscope. The effect of the detector misalignment between LYSO and GAPD was examined for four different alignment offsets of 0.0 mm, 0.5 mm, 1.0 mm and 1.5 mm for a pair of TOF-PET detector. The photopeak position decreased from ~400 mV to ~250 mV with increasing detector misalignment. the energy resolution and time resolution were degraded from 11.6% to 16.2%, and from 477 ps to 632 ps, respectively. This study demonstrated that PET detector performance was degraded considerably depending on the detector misalignment, which would be a critical issue for the development of TOF-PET detector.

Frequency Dependency of Electrical Property Stabilization during Vulcanization of Modified NR/IR Blends (개질된 NR/IR 블랜드의 가황 반응에서 나타나는 전기적 특성 안정화의 주파수 의존성)

  • Ahn, Won-Sool
    • Elastomers and Composites
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    • v.39 no.3
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    • pp.179-185
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    • 2004
  • Frequency dependency or electrical property stabilization during vulcanization of modified NR/IR composite materials was studied using in-situ electrical property measuring technique. Volume resistivity(p) before and after vulcanization reaction of the sample was measured as the function or frequency in the range or 1Hz to 10kHz at reaction temperatures of 130, 140, 150, and $160^{\circ}C$, respectively. A double stabilization mode of frequency dependency was observed, in which a slow stabilization process of p to a value of ca. $1.0{\times}10^7\;{\Omega}-cm$ occurred after a drastic initial decrease from ca. $9.0{\times}10^7\;{\Omega}-cm$. In addition, notable temperature dependencies of p values were also observed before and after vulcanization reaction, that is, p values at 130 and $140^{\circ}C$ after vulcanization were observed as about 1/3 of those values before vulcanization. All the observed facts were considered as the results from the interaction between the electrode and the bulk sample materials, i.e., electronic charge-discharge, and from the structure change of samples including CB rearrangement by the vulcanization.

The Effects of FTA Diversification on Bilateral Trade in the Spatial Model (공간모형을 통한 FTA의 다각화가 양자무역에 미치는 영향 분석)

  • Lee, Soon-Cheul
    • International Area Studies Review
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    • v.20 no.1
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    • pp.53-78
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    • 2016
  • This study is to analyze the effects of both the bilateral FTA and a home and its trade partner's FTAs on the trade with 62 country-pair panel data over the period of 2003-2013 using the gravity model and the spatial autoregressive model. First, the study analyzes how the bilateral FTAs affect the trade using the gravity model and the spatial model. Next, the article analyzes how the home and its trade partners' FTAs affect their trade using only the spatial model under controlling the bilateral FTA. The empirical results are summarized as the followings: first, the spatial mode fits well more than the gravity model in analyzing the relationship between the bilateral FTA and trade. It implies that the spatial spillover effect of FTA is important in the international trade with FTA. Second, the bilateral FTA plays a role in expanding the trade between or among the FTA members as proved by the previous studies. Third, the more the home and its trade partners' FTAs, the more the bilateral trade are extended. Fourth, with the bilateral FTAs, as the home and its trade partners enter into more FTAs, the bilateral trade reduces due to trade diversion effects. In conclusion, this study provides a political implication that in order to increase the trade volume, a country enters into as many FTAs as possible because the effects of the bilateral FTAs would decrease.

Big Data Management in Structured Storage Based on Fintech Models for IoMT using Machine Learning Techniques (기계학습법을 이용한 IoMT 핀테크 모델을 기반으로 한 구조화 스토리지에서의 빅데이터 관리 연구)

  • Kim, Kyung-Sil
    • Advanced Industrial SCIence
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    • v.1 no.1
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    • pp.7-15
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    • 2022
  • To adopt the development in the medical scenario IoT developed towards the advancement with the processing of a large amount of medical data defined as an Internet of Medical Things (IoMT). The vast range of collected medical data is stored in the cloud in the structured manner to process the collected healthcare data. However, it is difficult to handle the huge volume of the healthcare data so it is necessary to develop an appropriate scheme for the healthcare structured data. In this paper, a machine learning mode for processing the structured heath care data collected from the IoMT is suggested. To process the vast range of healthcare data, this paper proposed an MTGPLSTM model for the processing of the medical data. The proposed model integrates the linear regression model for the processing of healthcare information. With the developed model outlier model is implemented based on the FinTech model for the evaluation and prediction of the COVID-19 healthcare dataset collected from the IoMT. The proposed MTGPLSTM model comprises of the regression model to predict and evaluate the planning scheme for the prevention of the infection spreading. The developed model performance is evaluated based on the consideration of the different classifiers such as LR, SVR, RFR, LSTM and the proposed MTGPLSTM model and the different size of data as 1GB, 2GB and 3GB is mainly concerned. The comparative analysis expressed that the proposed MTGPLSTM model achieves ~4% reduced MAPE and RMSE value for the worldwide data; in case of china minimal MAPE value of 0.97 is achieved which is ~ 6% minimal than the existing classifier leads.

Dosimetric and clinical review on the application of TOMO_edge mode (토모테라피 Edge 모드를 이용한 임상적 유용성 고찰)

  • Kim, Lizzy
    • The Journal of Korean Society for Radiation Therapy
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    • v.26 no.2
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    • pp.177-182
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    • 2014
  • Purpose : The goal of this study was to compare and analysis the dose distribution and treatment time between Tomotherapy planning with fixed jaw(FJ) and dynamic jaw(DJ). Materials and Methods : Seven patients were selected in the study including five common clinical cases(brain, head and neck(HN), lung, prostate, spine). 1) Helical Tomotherapy plans with FJ and DJ were generated with the same planning parameters such as Modulation factor, Pitch and Field width. 2) Tomo_edge plans with a larger field width were generated to compare to conventional HT delivery with fixed jaw. Dosimetric evaluation indices for target coverage are Dmin, Conformity index(CI) and for whole body including target are $V_{10%}$, $V_{25%}$, $V_{50%}$, $V_{75%}$ using Dose-volume histogram(DVH). Also, Treatment time and Cumulative MU were used for clinical review on Tomo_edge. Results : In case of using the same field width of Tomotherapy planning with FJ and DJ, the averaged variations were $V_{10%}$: -11.91%, $V_{25%}$: -7.6%, $V_{50%}$ :-4.75%, $V_{75%}$: -1.04%. Tomo_edge with a larger field width provides the averaged variations for target coverage: Dmin: -0.72%, CI: -1.25% and also shows the tendency of a sharp $V_{x%}$ decline in low dose area. The clinical improvements in the larger field width with DJ were observed in the treatment time, ranging from -51.21% to -15.11, and the Cumulative MU decrease, ranging from -57.74% to -15.31%. Conclusion : Target coverage achieved by FJ and DJ with the same field width has little differences. But integral doses on whole body efficiently decreased. Compared to the conventional HT delivery, Tomo_edge with a larger field width presents a little worse target coverage. However, it provides faster treatment delivery and improved cranial-caudal target dose conformity. Therefore, Tomo_edge mode is efficient in improving the treatment time and integral dose while maintaining comparable plan quality in clinic.

Reproducibility Evaluation of Deep inspiration breath-hold(DIBH) technique by respiration data and heart position analysis during radiation therapy for Left Breast cancer patients (좌측 유방암 환자의 방사선치료 중 환자의 호흡과 심장 위치 분석을 통한 Deep inspiration breath-hold(DIBH) 기법의 재현성 평가)

  • Jo, Jae Young;Bae, Sun Myung;Yoon, In Ha;Lee, Ho Yeon;Kang, Tae Young;Baek, Geum Mun;Bae, Jae Beom
    • The Journal of Korean Society for Radiation Therapy
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    • v.26 no.2
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    • pp.297-303
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    • 2014
  • Purpose : The purpose of this study is reproducibility evaluation of deep inspiration breath-hold(DIBH) technique by respiration data and heart position analysis in radiation therapy for Left Breast cancer patients. Materials and Methods : Free breathing(FB) Computed Tomography(CT) images and DIBH CT images of three left breast cancer patients were used to evaluate the heart volume and dose during treatment planing system( Eclipse version 10.0, Varian, USA ). The signal of RPM (Real-time Position Management) Respiratory Gating System (version 1.7.5, Varian, USA) was used to evaluate respiration stability of DIBH during breast radiation therapy. The images for measurement of heart position were acquired by the Electronic portal imaging device(EPID) cine acquisition mode. The distance of heart at the three measuring points(A, B, C) on each image was measured by Offline Review (ARIA 10, Varian, USA). Results : Significant differences were found between the FB and DIBH plans for mean heart dose (6.82 vs. 1.91 Gy), heart $V_{30}$ (68.57 vs. $8.26cm^3$), $V_{20}$ (76.43 vs. $11.34cm^3$). The standard deviation of DIBH signal of each patient was ${\pm}0.07cm$, ${\pm}0.04cm$, ${\pm}0.13cm$, respectively. The Maximum and Minimum heart distance on EPID images were measured as 0.32 cm and 0.00 cm. Conclusion : Consequently, using the DIBH technique with radiation therapy for left breast cancer patients is very useful to establish the treatment plan and to reduce the heart dose. In addition, it is beneficial to using the Cine acquisition mode of EPID for the reproducibility evaluation of DIBH.

The Effects of Kisaeng's Clothes on General Women's Fashion in the Late Choson Dynasty (조선후기 기여복식이 일반부녀자 복식에 미친 영향)

  • 김나형;김용서
    • Journal of the Korean Society of Costume
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    • v.39
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    • pp.113-123
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    • 1998
  • This study focuses on the effects of the clothes worn by kisaeng; courtesans trained in singing and dancing, on changes in female psychology as reflected in general women's fashions during the later years of the Chosun dynasty. During this period, the social order had broken down considerable, due in part to the introduction of Roman Catholicism, and in part to the actions of Sil-hak, who emphasized open-ness and practicality in the organization of social affairs. This freer social environment disrup-ted the established social hierarchies. The kisaeng were among the first to respond to the new social mores by adopting more colorful, sensual, and individualized fashions. Their social position allowed them to reflect the new aesthetics of the time right away. Those aesthetics seemed to lay great emphasis on the artistic effects of contrast. The kisaeng would adorn their heads with large Kache (an elaborate wig or hairdo typically reserved for use by women in full formal dress). In contrast to this conspicuous hairstyle, they typically wore very tight-fitting Jogori (short-cropped Korean traditional jackets for women) around their upper torsos. The long skirts emerging from beneath these short jackets would typically flare out dramatically, with the aid of petticoats. However, these skirts would be bound at the waist with a sash, increasing the sexual suggestiveness of the clothing by drawing at-tention to the hips, and by exposing the bottom frills of the petticoats, or the wide pantal-oons and other undergarments the kisaeng wore to add volume to their skirts. The relative freedom enjoyed by the kisaeng to experiment with new fashions was not widely shared by most women. This generated envy from women of the noble classes, who were more bound by convention, and restrained from adopting such a mode of dress. It also generated envy from women of the humble classes, who saw the kisaeng as working little for their wealth, and yet dressing every day in finery that the average women would only ever be able to afford on her wedding day. This envy directed at the relative freedom/wealth of the kisaeng by women who faced greater socioeconomic constraints was given cultural expression through the adoption of elements of the kisaeng's fashion in the fashions of both noblewomen and humble women in old korea. The luxurious Kache sported by the kisaeng had in fact been borrowed from the habitual attire of upper-class women. So to distinguish themeselves from the kisaeng, they began to abandon these elaborate hairstyles in favor of traditional ceremonial hoods (Nel-ul-a thin black women's hood) and coronets (Suegaechima). This supposed reaction to the abuse of the Kache by the kisaeng still remained influenced by the kisaeng still remained influence by the kisaeng, however, as these headdresses became adorned with many more jewels and decorations, in imitation of the kisaeng's adaptations of the coronet. At the same time, noblewomen began sporting the Jangwue ; a headdress previously worn only by kisaeng and lower class women, and lower class women were then permitted to wear the Kache at weddings. All women behan to wear shorter, tighter Jogori jackets, and to add volume to their skirts. They also attached frills to their under-garments in imitation of the kisaeng's exposed petticoats and pantaloons. The impact of kisaeng fashions was thus deep and widespread, and can be understood as an expression of women's longing for freedom from socioeconomic constraints in the late Chosun dynasty. This study adopts an interdisciplinary ap-proach to the understanding of historical changes in women's fashions. Such interdisciplinary work can greatly enrich the study of fashion, often narrowly focused on clothing morphology and broad generalizations about society. For this reason, specific dynamics of feminine psychology in the late Chosun dynasty were elaborated in this study, to provide a deeper under-standing of the changes in fashion underpinned by them. If more such detailed analyses are undertaken, a whole new understanding of changes in fashion can be generated, and perhaps a transformation of the field of fashion history can be ultimately achieved.

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