• 대한청각학회지
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• 제24권3호
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• pp.149-156
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• 2020

Background and Objectives: The gap prepulse inhibition of the acoustic startle response has been used to screen tinnitus in an animal model. Here, we examined changes in the auditory late response under various conditions of gap prepulse inhibition. Subjects and Methods: We recruited 19 healthy adults (5 males, 14 females) and their auditory late responses were recorded after various stimuli with or without gap prepulsing. The N1 and P2 responses were selected for analysis. The gap prepulse inhibition was estimated to determine the optimal auditory late response in the gap prepulse paradigm. Results: We found that the gap per se generated a response that was very similar to the response elicited by sound stimuli. This critically affected the gap associated with the maximal inhibition of the stimulus response. Among the various gap-stimulus intervals (GSIs) between the gap and principal stimulus, the GSI of 150 ms maximally inhibited the response. However, after zero padding was used to minimize artifacts after a P2 response to a gap stimulus, the differences among the GSIs disappeared. Conclusions: Overall, the data suggest that both the prepulse inhibition and the gap per se should be considered when using the gap prepulse paradigm to assess tinnitus in humans.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권12호
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• pp.4508-4530
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• 2021

Today distributed data storage service are being widely used. However lack of proper means of security makes the user data vulnerable. In this work, we propose a Randomized Block Size (RBS) model for secure data storage in distributed environments. The model work with multifold block sizes encrypted with the Chinese Remainder Theorem-based RSA (C-RSA) technique for end-to-end security of multimedia data. The proposed RBS model has a key generation phase (KGP) for constructing asymmetric keys, and a rand generation phase (RGP) for applying optimal asymmetric encryption padding (OAEP) to the original message. The experimental results obtained with text and image files show that the post encryption file size is not much affected, and data is efficiently encrypted while storing at the distributed storage server (DSS). The parameters such as ciphertext size, encryption time, and throughput have been considered for performance evaluation, whereas statistical analysis like similarity measurement, correlation coefficient, histogram, and entropy analysis uses to check image pixels deviation. The number of pixels change rate (NPCR) and unified averaged changed intensity (UACI) were used to check the strength of the proposed encryption technique. The proposed model is robust with high resilience against eavesdropping, insider attack, and chosen-plaintext attack.

• Physical Therapy Rehabilitation Science
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• 제11권4호
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• pp.436-445
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• 2022

Objective: Deformation of soft tissues around the neck and scapularcan caused by forward head posture(FHP), which has an uncomfortable effect on biomechanical changes in the scapula as well as functional disorders of the shoulder. However, studies related to direct FHP, biomechanical changes in the scapulafunction, and shoulder pain and disorder have not yet been conducted. Therefore, purpose of this study is to effect of decresedthe FHP on the shoulder function of the sacpular biomechanical examine the change in the shoulder painand disorder. Design: A randomized controlled trial Methods: The participants were 32adults(23.03±3.90 years) recruited and redivided randomly into Forward head posture corrective exercise(FHPCE) vs Control. The FHPCE group was proceeded according to the over load principle through 2steps biofeedback exercise and corrective exercise(n=16). The control (n=16) was TENS did not operated and padding 20 minute. This study was conducted 3 times a week for 4a weeks. Results: FHPCE group is improve in the results of craneocervical angle(p<0.05, 95% CI: 0.352, 4.073). In Mechanical changes of scapula in the shoulder flexion more significant improvement in FHPCE than control group[Axis X(p<0.05), Y(p<0.01), Z(p<0.01)], and shoulder abductionmore significant improvement in FHPCE than control group[xis X(p<0.01)], as well FHPCE showed significant increased in the results in the shoulder pain(p<0.05, 95% CI: -13.244, -1.566) Conclusions: This study suggected that FHP affects the biomechanical changes of the shoulder, and a new method for shoulder pain intervention

• 한국염색가공학회지
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• 제3권1호
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• pp.37-45
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• 1991

면직물의 Embossing 가공은 의류, 종이, 가죽 제품 등에 수요가 상당히 많고, Moire 및 Schreiner 가공은 의류에 이용되고 있다. 原布(grey)$\rightarrow$(2) 檢布(cloth inspection).標識(marking)$\rightarrow$((3) 節取(knotting), 修正(mending), 汚染빼기(stain removing)$\rightarrow$((4) 필이음(cloth sewing).rolling$\rightarrow$((5) 燒毛(singeing)v(6) 糊拔(desizing)$\rightarrow$((7) 水洗(washing)$\rightarrow$((8) 精練(scouring)$\rightarrow$((9) 水洗(washing)$\rightarrow$((10) 漂白(bleaching)$\rightarrow$((11) 水洗(washing)$\rightarrow$((12) 酸處理(souring)$\rightarrow$((13) 水洗(washing)$\rightarrow$((14) 打布(scutching)$\rightarrow$((15) 脫鹽素處理(dechlorination).水洗 (16) 螢光漂白(optical bleaching). 乾燥(drying)$\rightarrow$((17) Mercerizing.水洗.乾燥$\rightarrow$((18) 染色(dyeing).捺染(printing).水洗.乾燥$\rightarrow$((19) 樹脂液 padding 및 豫備乾燥$\rightarrow$((20) Embossing calendering(또는 moire calendering, schreiner miendering)$\rightarrow$((21) 熱處理(curing)$\rightarrow$((22) Soaping$\rightarrow$((23) 乾燥$\rightarrow$((24) 給混 (damping)$\rightarrow$((25) 幅내기$\rightarrow$((26) 最終檢布(final inspection)$\rightarrow$((27) 천접기(holding) $\rightarrow$((28) 整布(1필씩 짜르기)$\rightarrow$((29) 천감기(1필씩 또는 1권으로)$\rightarrow$((30) 商標붙이기(marking).包裝(packing).荷造(baling).出荷(forward)

• 한국전자통신학회논문지
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• 제17권2호
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• pp.357-364
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• 2022

의사난수 생성기(PRNG)는 많은 양의 난수가 필요할 때 사용되는 프로그램이다. 대칭 키 암호시스템에서 대칭 키를 생성, 공개 키 암호나 디지털 서명에서 공개 키 쌍의 생성, 일회용 패드로 패딩에 사용되는 열을 생성하는 데 사용한다. 다양한 과학 분야에서 비선형 동역학계를 구체적으로 표현하는데 유용한 셀룰라 오토마타(CA)는 이산적이고 추상적인 계산 시스템으로 하드웨어 구현이 가능하여 암호시스템에서 키를 생성하는 PRNG로 응용되고 있다. 본 논문에서는 이웃 셀의 반경을 2로 증가한 5-이웃 CA를 이용하여 비선형 수열을 효과적으로 생성할 수 있는 프로그램 가능한 5-이웃 CA기반의 PRNG를 합성하는 알고리즘을 제안한다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2021년도 추계학술대회
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• pp.33-36
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• 2021

본 논문에서는 강화학습을 이용하여 몰입형 영상의 압축 효율을 향상시키는 기법을 제안한다. 몰입형 영상이란 3DOF+ 영상 혹은 Point Cloud 영상과 같이 사용자가 직접 체험할 수 있는 영상을 의미한다. 또한 몰입형 영상은 그 특성에 의해 방대한 양의 정보를 가지고 있다. 따라서 이를 압축하기 위한 압축 방법들이 연구되고 있으며, 일반적으로 3D 공간의 영상을 2D 공간으로 사영하는 방식을 사용한다. 하지만 이 과정에서 정보가 존재하지 않는 영역이 생성되며 이는 압축 효율 저하의 원인이 된다. 이러한 문제를 해결하기 위하여 영상의 특성을 반영할 수 있도록 강화학습을 통한 채우기 기법을 제안한다. 실험 결과 제안한 기법이 기존 기법에 비해 좋은 성능을 보임을 확인할 수 있다.

• 대한가정학회지
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• 제43권2호
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• pp.115-126
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• 2005

Environmentally and human compatible chitosan were pretreated on cotton fabrics which were then dyed with 100% persimmon juice. The chitosan concentration was 1% and the chitosan types were high molecular weight chitosan (1980cps), low molecular weight chitosan (18첸), chitosan oligomer and water soluble chitosan. The properties of the fabric surfaces, the dyeabilities, the color fastnesses, the antibacterial activities, the strengths, the elongations and the drape stiffnesses were evaluated. The properties of the chitosanpretreated, persimmon juice-dyed cotton fabrics (CLP) were compared to those of the untreated (CN), chitosan treated (CL) and persimmon juice-dyed fabrics (CP). The results were as follows. The fibers extruded from the surface of CN decreased on CP. The air between the fibers within CN were substituted by chitosan solution or persimmon juiceand decreased within CLP according to SEM observations. The effects of chitosan treatment, the chitosan molecular weights and the degrees of deacetylation of chitosan on the dyeabilities of the persimmon juice-dyed cotton fabric were not distinct. The curing after chitosan padding improved the dyeabilities of CLP compare to noncuring. The strengths of CP decreased and those of CL increased, compared to those of CN. The strengths of CLP were greater than those of CP. The elogations of CP and CL were greater than those of CN. The strengths and elongations of CLP were greater than those of CN. The chitosan treatments improved the strengths but not the elongations. The drape stiffnesses of CL, CP and CLP were greater than those of CN. The antibacterial activites of chitosan pretreated, persimmon juice-dyed cotton fabrics against Staphylococcus aureus were increased by more than 98% by persimmon juice.

• 대한전자공학회논문지SD
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• 제42권5호
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• pp.23-30
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• 2005

확장체 GF($p^n$)의 구성에서 차수와 다항식 곱셈 방법은 밀접한 관련을 가진다. 기존의 다항식 곱셈 방법인 KO] 및 MSK 방법은 효율적으로 계수-곱셈 연산량을 줄인다. 그러나 이들 방법을 이용하여 확장체 곱셈을 구성할 경우, 일반적으로 해당하는 분할 방법의 배수가 되도록 패딩(Padding)하여 구성하지만 이에 대한 기준이 모호하며 계수-곱셈의 연산량이 최소가 되도록 패딩하는 방법 또한 제안되지 않았다. 본 논문에서는 확장체 곱셈을 효율적으로 구성할 수 있는 기본적인 성질과 계수-곱셈의 연산량이 최소가 되는 다항식 차수를 찾는 알고리즘을 제안한다. 본 논문에서 제안하는 알고리즘을 적용하면 기존의 방법을 그대로 적용하여 구성할 때 보다 확장체의 차수가 증가할수록 더 많은 계수-곱셈 연산량을 줄일 수 있다. 따라서 본 논문의 결과는 스마트 카드 등 작은 공간 복잡도를 요구하는 병렬처리 곱셈기에 효율적으로 적용될 수 있다.

• 한국의류산업학회지
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• 제22권5호
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• pp.551-560
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• 2020

Due to the nature of fashion design that responds quickly and sensitively to changes, accurate forecasting for upcoming fashion trends is an important factor in the performance of fashion product planning. This study analyzed the major phenomena of fashion trends by introducing text mining and a big data analysis method. The research questions were as follows. What is the key term of the 2010SS~2019FW fashion trend? What are the terms that are highly relevant to the key trend term by year? Which terms relevant to the key trend term has shown high frequency in news articles during the same period? Data were collected through the 2010SS~2019FW Pre-Trend data from the leading trend information company in Korea and 45,038 articles searched by "fashion+material" from the News Big Data System. Frequency, correlation coefficient, coefficient of variation and mapping were performed using R-3.5.1. Results showed that the fashion trend information were reflected in the consumer market. The term with the highest frequency in 2010SS~2019FW fashion trend information was material. In trend information, the terms most relevant to material were comfort, compact, look, casual, blend, functional, cotton, processing, metal and functional by year. In the news article, functional, comfort, sports, leather, casual, eco-friendly, classic, padding, culture, and high-quality showed the high frequency. Functional was the only fashion material term derived every year for 10 years. This study helps expand the scope and methods of fashion design research as well as improves the information analysis and forecasting capabilities of the fashion industry.

• 패션비즈니스
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• 제13권1호
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• pp.102-114
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• 2009

Chitosan is a polysaccharide with cationic amino groups in its structure and has useful properties as functional materials. Various end-use developments of chitosan are in progress. When the cotton fabric is pretreated with chitosan, the hand property of cotton fabric may be improved expecially for the summer apparel. In this study, as a cross-linking agent to introduce chitosan into cotton, BTCA(butane-1,2,3,4-tetracarboxylic acid) or CA(citric acid) was added in order to prevent detachment of chitosan by the cross-linking. During the cross-linking procedure, via the padding-drying-heat setting, amino groups of chitosan and hydroxyl groups of cotton, carboxyl groups of BTCA/CA are cross-linked by forming anhydrous cyclic rings. Since BTCA has four carboxyl groups, cross-linking by thermal treatment is easy, leading to the trials in wrinkle-recovery treatment of cotton fabrics. However, the high price of the BTCA reagent has been a shortcoming in the actual application for industrial use. Therefore, in this study, we tried the application of CA having three carboxyl groups, which is relatively low priced, as the substituting cross-linking agent. The hand of the treated fabrics were evaluated by measuring physical properties. In addition, based on the physical properties, three-dimensional images were introduced by using 3D CAD systems and results were compared.