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The Mechanical Properties and Hand of Cotton Fabrics with the Variation of Weft Density (면직물의 위사밀도 변화에 따른 역학특성 및 태)

  • Bae Jin-Hwa;Park Jung-Whan;An Seung-Kook
    • Science of Emotion and Sensibility
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    • v.8 no.4
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    • pp.345-354
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    • 2005
  • In this study, the mechanical properties and hand characteristics have been analyze4 according to fabric structural parameters such as the weft density and weave stricture of cotton fabric. KES-FB system was used to measure hand characteristics and mechanical properties of fabric. The weft density made an effect on bending and shear properties but not on tensile , compression, and surface properties. In case of wearing property, B/w, 2HG/G, 2HB/B, 2HB/W, $\sqrt[3]{B/W}$, $\sqrt{2HB/W}$, W/T, WC/W were affected tv the weft density. The crimp was highly correlated with the tightness, hand, wearing an4 mechanical properties, specially tensile linearity, bending, shear, and compression properties. The weft crimp influenced the bending, shear, compression resilience, surface roughness, hand, and wearing properties. The tightness has an effect on tile bending, shear, compression, surface friction, hand, and wearing properties.

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Event Sentence Extraction for Online Trend Analysis (온라인 동향 분석을 위한 이벤트 문장 추출 방안)

  • Yun, Bo-Hyun
    • The Journal of the Korea Contents Association
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    • v.12 no.9
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    • pp.9-15
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    • 2012
  • A conventional event sentence extraction research doesn't learn the 3W features in the learning step and applies the rule on whether the 3W feature exists in the extraction step. This paper presents a sentence weight based event sentence extraction method that calculates the weight of the 3W features in the learning step and applies the weight of the 3W features in the extraction step. In the experimental result, we show that top 30% features by the $TF{\times}IDF$ weighting method is good in the feature filtering. In the real estate domain of the public issue, the performance of sentence weight based event sentence extraction method is improved by who and when of 3W features. Moreover, In the real estate domain of the public issue, the sentence weight based event sentence extraction method is better than the other machine learning based extraction method.

A Study on the Waterproofing Performance of Waterproofing Methods for PHC-W Earth Retaining Wall Based on Pressure Chamber Test (PHC-W 흙막이 공법의 차수방안에 관한 차수성능확인을 위한 모형 압력 수조 실험 연구)

  • Choi, Yongkyu;Johannes, Jeanette Odelia;Yun, Daehee;Kim, Chae min;Jeon, Byeong Han
    • Journal of the Korean Geotechnical Society
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    • v.33 no.12
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    • pp.115-125
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    • 2017
  • PHC-W earth retaining wall could be constructed continuously. Various retaining wall methods such as C.I.P. etc. method require separate waterproof method. However, the PHC-W retaining wall method prevents leakage of groundwater by inserting a waterproofing material at connection part between 2 PHC piles. In this study, the experimental study on 3 waterproofing method for PHC-W retaining wall was conducted at the model pressure chamber. In the method using textile with 1-liquid type and 2-liquid type urethane, rapid leak occurred at the pressure of 120 kPa and 140 kPa or more. In the method of textile with grouting, rapid leak occurred at the pressure of 120 kPa or more, however, in this method, the rapid leakage happened at the top part and the bottom part reinforced with urethane.

Magnetism in Ni-W textured substrates for coated conductors

  • Song K. J.;Park Y. M.;Yang J. S.;Kim S. W.;Ko R. K.;Kim H. S.;Ha H. S;Oh S. S.;Park C.;Joo J. H.;Kim C. J.
    • Progress in Superconductivity and Cryogenics
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    • v.7 no.2
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    • pp.7-10
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    • 2005
  • The magnetic properties of a series of both annealed (biaxially textured) and as-rolled (non-textured) Ni-xW alloy tapes with compositions x = 0,1,3, and 5 at.$\%$, were studied. Characterization methods included XRD analyses to investigate the biaxial cube texturing of the annealed Ni-W alloy tapes and studies of the magnetization M for both annealed and as-rolled Ni-W alloy tapes. Both the isothermal mass magnetizations M(H) of a series of samples at different fixed temperatures and M(T) in fixed field, employing a PPMS-9 (Quantum Design), were measured. The Ni-W alloys have shown much reduced ferromagnetism as W-content x increases. Both the saturation magnetization Msat and Curie temperature Tc decrease linearly with W-content x, and both Msat and Tc go to zero at critical concentration of Xc - 9.50 at. $\%$ W.

Capacity esitmation of microcell in macro/microcell overlaid W-CDMA WLL system (매크로셀과 마이크로셀이 중첩된 W-CDMA 무선가입자망에서 마이크로셀의 용량 산정)

  • 손성찬;노재성;김수용;조성준
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.23 no.9A
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    • pp.2153-2164
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    • 1998
  • This paper has presented the parameters for the coexistence between two systems in macro/microcell ovelaid W-CDMA WLL (wideband CDMA wireless local loop) and has calculated the capacity of forward/reverse link in microcell. To produce the capacity for analyzing system interference effects, we have shown tables and graphs with the parameters sucyh as RF channel bandwidth of WLL(W), the transmission rate of service message(R), the required signal power to noise power ratio( $E_{b/}$ $N_{0}$) for achieving accepatable error rate, te user number ( $N_{W1}$, $N_{W2}$) of the neighboring system, the signal power to interference power ratio(.GAMMA.$_{C1B}$, .GAMMA.$_{C2B}$) of the neighboring system, the normalized distance(d) between microcell and macrocell base-station, and microcell to macrocell radius ratio ( $R_{d}$). From the results, we have convinced that the capacity of microcell diminishes as increasing the user number ( $N_{W2}$) in macrocell, increasing the microcell radius, and decreasing the normalized distance(d) between microcell and macrocell base-station. Especially, we have known that when $R_{d}$=0.1, $N_{W2}$ must be below 24 at .GAMMA.$_{C2B}$ = 0 dB and below 8 at .GAMMA.$_{C2B}$ = 4 dB for the acceptable capacity raito to be over 80%. Therfore, this paper is usefult to design microcell W-CDMA WLL for accommodating more user number under the interference effects of macrocell W-CDMA WLL and is expected to be reference in power control if base-station.ation.ion.ation.ation.

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A Study for DHRMIS S/W Quantitive Quality Evaluation (국방 인사정보 S/W체계의 정량적 품질평가 연구)

  • Rho, Seung-Dam;Park, Dea-Woo
    • Journal of the Korea Society of Computer and Information
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    • v.13 no.4
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    • pp.273-280
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    • 2008
  • This paper is thing for a quantitive quality evaluation in national Defense Human Resource Management Information S/W system development. Apply a quantitive quality evaluation way to be based on an international standard to admonish at ISO/IEC 9126. Proposed 6 basis of count, and set up sub 27 items detailed functionality, reliability, use anger, efficiency, maintenance anger, a transplant result, and inspection of quality table wrote the Matrix measured S/W quality to a chart. Studied a quantitive evaluation plan of a Defense Human Resource Management Information S/W system to see weight by the priority order that reflected a characteristic of a national defense business to a Purpose of a subject user, and Presented. It is 80% in quantitive quality evaluation application satisfied under 8, Very Satisfied 7(87.5%) Satisfied 1(12.5%) of Defense Human Resource Managers and judgment worked as marked so that satisfaction of reliability and a user regarding functionality was high and there will be contribute to an elevation of defense capabilities as analyze efficient national defense S/W use and effect.

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Anti-Oxidant Effect of Hyeongbangjiwhang-tang Decoction in Kidney, Bladder and Spleen Cell of SD Rats (형방지황탕(荊防地黃湯) 전탕액이 노화쥐의 신장, 비장, 방광 세포의 항산화능에 미치는 영향)

  • Lee, Han-Eol;Ahn, Taek-Won
    • Journal of Sasang Constitutional Medicine
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    • v.20 no.2
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    • pp.85-97
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    • 2008
  • 1. Objectives The purpose of this study is to investigate the anti-aging and anti-oxidant effects of Hyeongbangjiwhang-tang decoction(HGD) in SD rats. 2. Methods This experiment was used the tissue of kidney, bladder and spleen cells of 6, 52 and 68 weeks old SD rats. Each age group was again divided into three groups. One group, as normal group, was not-treated cells, another group, as control group, was saline-treated cells, and the last group, as experimental group, was HG-treated cells. After culture for 48 hours, each groups measured the level of SOD, GSH, MDA and NO in the tissue of kidney, bladder and spleen cells. 3. Results and Conclusions The activity of SOD were significantly increased in kidney cell of 68 w-HGD group, bladder cell of 52 w-HGD group and in spleen cell of 52,68 w-HGD group compared with those of the control groups. The level of GSH were significantly increased in bladder cell of 52w-HGD group and in spleen cell of 68w-HGD group compared with those of the control groups. The level of MDA were significantly decreased in bladder cell of 68 w-HGD group and in spleen cell of 68w-HGD group compared with those of the control groups. The level of NO were significantly decreased in kidney cell of 68 w-HGD group, bladder cell of 52, 68w-HGD groups, and in spleen cell of 68w-HGD group compared with those of the control groups. These results suggest that HGD(Hyeongbangjiwhang-tang) has anti-oxidant effects in aged rats.

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Effects on Skin Irritation and Turnover Rate by the Control of Skin Permeability of Alpha-hydroxyacids

  • Cheon-Koo Lee;Seo
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.22 no.2
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    • pp.132-140
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    • 1996
  • The effect of a novel delivery system, water in oil emulsion containing chitosan hydrogel as a inner phase (W/O-C) was evaluated, and the relationships between the skin permeation, the skin primary irritation and the skin turnover rate of AHAs were discussed. We selected glycolic acid (GA), lactic acid (LA), malic acid (MA), and tartaric acid (TA) as model AHAs. The steady state fluxes of 4 AHAs across the excised hairless mouse skin increased as the molecular weights of the AHAs decreased. (GA>LA>MA>TA). The skin turnover times were shortened in all AHAs, compared with control. The skin permeation and the skin primary irritation of the LA decreased and the skin turnover time increased, as the pH increased. The maximum therapeutic index was obtained with pH 3.8, 0.5 M LA. It was suggested that the skin permeability of LA might be a main factor for prediction of the skin irritation and the skin turnover time. On the other hand, the W/O-C containing pH 3.8, 0.5 M LA indicated a good sustained release property of LA, compared with water in oil emulsion without chitosan hydrogel (W/O) or oil in water emulsion (O/W). The skin permeability and the skin irritation of AHAs from the W/O-C edcreased, compared with W/O or O/W, however the skin turnover time showed almost the same value as W/O or O/W. In conclusion, we suggest that the control of the skin permeation of AHAs would be an important tool for reducing the skin irritation and for maintaining the positive effect of AHAs, and the W/O-C system could be a potential candidate for future cosmetological application of AHAs.

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Strategy for u-Manufacturing Technology Introduction for Promotion of IT S/W Industry in Gyeongnam (경남 소프트웨어 산업 진흥을 위한 유비쿼터스 생산정보화기술 도입방안에 대한 연구)

  • Moon, Dug-Hee;Park, Chul-Soon
    • Journal of Digital Convergence
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    • v.9 no.6
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    • pp.71-80
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    • 2011
  • Gyeongnam province is well known for its high concentration on machinery manufacturing industry. However, this province is losing competitive advantage due to the lack of IT S/W industry. In this paper, we propose a way for adoption of u-Manufacturing technology to promote IT S/W industry in Gyeongnam. At first, we identified the needs of manufacturing companies and the capabilities of the IT S/W companies with survey. Based on the survey analysis, then we set up the u-Manufacturing concept and proposed Manufacturing IT middleware to support it. Finally, we proposed a strategy to promote smoothly the adoption of u-Manufacturing technology in this area.

A Study on the Preparation of Hollow Microspheres Using Waste Polystyrene (폐 Polystyrene을 이용한 중공 미세구 제조에 관한 연구)

  • Kwon, Soon Young;Woo, Je-Wan
    • Clean Technology
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    • v.12 no.4
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    • pp.205-210
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    • 2006
  • In this study, polystyrene hollow microspheres were prepared via optimized purifying steps for the reuse of waste polystyrene. PS/PVA double layered hollow microspheres were prepared using the multiple emulsion ($W_1/O/W_2$) method with recycled polystyrene. The sonication treatment at the first stage of $W_1/O$ emulsion formation was very important factor of control of particle size and its distribution. When sonication was treated for 20 seconds, the average particle size and distribution were $1.35{\mu}m$ and $0.8{\mu}m{\sim}2.8{\mu}m$, respectively. The double layered hollow microspheres that have smaller and uniformed particle size distribution were manufactured when gelatin or Tween 80 was used as surfactants in the $W_2$ phase.

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