• Textile Coloration and Finishing
• /
• v.13 no.1
• /
• pp.45-54
• /
• 2001

The Purpose of this studs was to investigate dyeing properties of silk and nylon fabrics by Polygonum cuspidatum extract. The properties were evaluated by it's extracting condition, dyeing condition, mordants variables, methods of mordanting and color fastness. Silk fabric showed the highest K/S value at $50-70^\circ{C}$, while Nylon fabric showed at $90^\circ{C}$. Surface color of dyed fabrics were various by the used mordants ; none-, and Al-mordanted fabrics were yellow, Cu-mordanted fabrics were redish yellow, Fe-mordanted fabrics were olive green. Fe-mordanted silk fabrics showed excellent laundering fastness and light fastness. Both silk and nylon fabric showed excellent laundering and dry cleaning fastness.

• The Research Journal of the Costume Culture
• /
• v.10 no.6
• /
• pp.781-792
• /
• 2002

Microorganisms living in clothing cause damage to fabric as well as unhygienic conditions with unpleasant odor fur wearers. Removal or growth of microorganisms are affected by the conditions during washing and storage. The purpose of this research was to study the consumer's knowledge and habits in laundering with respect to microorganisms in clothing. For survey method, questionnaires were administered to 580 housewives, age of 20∼60s living in Seoul. Employing 479 respondents, the data were analyzed by using descriptive statistics. The results are as follows: The level of knowledge about microorganisms of clothing was high in general, but wasn't expert level. Many people had experienced damages of textiles, clothing and unpleasant odor due to microorganisms. Fabric softeners and bleaches were rarely used for disinfection but usually used for antistatic, whitening or removal of stains. There was no relationship between laundering habits, the knowledge of microorganism, and experience of clothing damage by microorganism.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.21 no.3
• /
• pp.600-606
• /
• 1997

The dyeing with loess has been studied. Two kinds of cotton fabrics having different thickness and density were dyed in loess paste bath. The color differences of the fabrics which were dyed repeatedly.five times were not significant. The dyeing of cotton fabrics with loess was not exactly reproducible, but dyeability of the cotton fabrics of high density was better than that of low density. Loess on the dye6 fabrics was physically jammed between the fibers in the form of the fine particles. The cotton fabrics dyed with loess have good light fastness, but their laundering fastness and abrasion fastness were not good. An aftertreatment was carried out by using the extracted solution from acorn or persimon, and FeSO4 lot improving fastness. When the dyed fabrics was after-treated with FeSO4, the laundering fastness and wet abrasion fastness were improved extremely.

• Water for future
• /
• v.27 no.1
• /
• pp.69-77
• /
• 1994

As the standard of living improves, the amount of synthetic detergent consumption greatly increases. Detergents which are not treated in the sewer treatment processes, flow into rivers or waterstreams and accelerate the pollution of the surface water resources. Detergents contain lots of toxicants. And it is difficult to evaluate gross toxicity of each toxicant in thereceiving water. In the study, the acute toxicity of the synthetic detergents for home laundering and kitchen use were monitored with daphnia magna and photobacterium phosphoreum. Seven kinds of detergents were tested to evaluate the acute toxicity. The mean 24hr, 48hr-LC50 of the synthetic detergent for home laundering were 4.25%, 2.50% and these for kitchen use were 2.01%, 1.36% respectively. And the mean 5min, 15min-EC50 of the synthetic detergent for home laundering were 1.83%, 1.02%.

• Journal of Fashion Business
• /
• v.9 no.2
• /
• pp.71-83
• /
• 2005

In this study, we reviewed the color changes accompanying the laundering, wash fastness, and abrasion fastness of chitosan-treated cochineal-dyed fabrics. The treatment methods were classified into two based on the chitosan treatment: (Method 1): fabric specimens were pre-treated with chitosan prior to the dyeing procedure in salt form. (Method 2): the state of chitosan acid salt formation, coated on the yarn surface, was destroyed and neutralized prior to the dyeing process. The changes in the chitosan treatment methods bear more important meaning in view of the durability. In Method 1, it is highly likely for the chitosan to be detached from the surface by water during laundering since the chitosan is coated as acid salt state. In Method 2, the resistance d the chitosan to water was supposed to revive since the chitosan would return to its original state. Differences in the resistance of the chitosan treatrrent, however, according to the Method 1 and Method 2, fell short of our expectations. In Method 2, the wash fastness did not improve as we expected since the bond between the fibers comprising fabric specimens and the chitosan is not high even if the chitosan itself has high resistance to water.

• Korean Journal of Human Ecology
• /
• v.1 no.1
• /
• pp.103-112
• /
• 1998

Cotton fabric was treated with chitosan by pad-dry(-cure) method to impart antimicrobial properties. Four chitosans of different degree of deacetylation (DAC: 65~95%) with similar molecular weight(MW: ca. 50, 000) and one chitosan oligomer(MW 1, 800, DAC 86%) were used. In order to improve the durability to laundering of antimicrobial activity for the fabrics treated with chitosan oligomer, crosslinker or binder was included in the finishing formulation. Antimicrobial activity against Staphylococcus aureus and Proteus vulgaris was evaluated by the Shake Flask Method. The treated fabrics were laundered up to 20 times according to AATCC Test Method 60-1986 or JIS 0217-104 and antimicrobial activity of the laundered fabrics was evaluated. The antimicrobial activity was increased with the increase of concentration and degree of deacetylation of chitosan. And the cured fabrics showed better durability to laundering than the not-cured fabrics according to AATCC Test Method 60-1986. Crosslinker and binder decreased antimicrobial according of the fabrics treated with chitosan oligomer and were not effective to improve the durability to laundering according to JIS 0217-104. (Korean J Human Ecology 1(1) : 103~112, 1998)

• The Journal of Bigdata
• /
• v.1 no.1
• /
• pp.85-94
• /
• 2016

Traditional Anti-Money Laundering (AML) software applications monitor bank customer transactions on a daily basis using customer historical information and account profile data to provide a "whole picture" to bank management. With the advent of Big Data, these applications could be benefited from size, variety, and speed of unstructured data, which have not been used in AML applications before. This study analyses the weaknesses of a bank's current AML systems and proposes an AML systems taking advantage of Big Data. For example, early warning of AML risk can be improved by exposing identities and uncovering hidden relationships through predictive and entity analytics on real-time and outside data such as SNS data.

• Information Systems Review
• /
• v.22 no.4
• /
• pp.135-161
• /
• 2020

With the growth of blockchain and cryptocurrency-related markets, cryptocurrency exchanges are growing as a new industry. However, as the legal and regulatory definitions of cryptocurrencies are still in progress, unlike existing industrial groups, they are not under the supervision of regulatory agencies. As a result, users (i.e., cryptocurrency investors) have suffered two types of damage that could occur from hacking and other accidents on the exchanges. One type of the damage is the loss of assets caused by the extortion of personal information or account and the other is the damage from users who might be involved in external frauds. Both are analyzed in comparison with existing operators whose functions are like the exchanges. The results of this study show that membership (KYC: Know Your Client), log-in, and additional authentication in transactions are on the similar level to those of the operators while the fraud detection system (FDS) and anti-money laundering (AML) of fiat currencies and cryptocurrencies need rapid improvement.

• Journal of Intelligence and Information Systems
• /
• v.14 no.2
• /
• pp.179-192
• /
• 2008

This case study shows constructing the knowledge-based system using a rule-based approach for detecting illegal transactions regarding money laundering in the Korea Financial Intelligence Unit (KoFIU). To better manage the explosive increment of low risk suspicious transactions reporting from financial institutions, the adoption of a knowledge-based system in the KoFIU is essential. Also since different types of information from various organizations are converged into the KoFIU, constructing a knowledge-based system for practical use and data management regarding money laundering is definitely required. The success of the financial information system largely depends on how well we can build the knowledge-base for the context. Therefore we designed and constructed the knowledge-based system for anti-money laundering by committing domain experts of each specific financial industry co-worked with a knowledge engineer. The outcome of the knowledge base implementation, measured by the empirical ratio of Suspicious Transaction Reports (STRs) reported to law enforcements, shows that the knowledge-based system is filtering STRs in the primary analysis step efficiently, and so has made great contribution to improve efficiency and effectiveness of the analysis process. It can be said that establishing the foundation of the knowledge base under the entire framework of the knowledge-based system for consideration of knowledge creation and management is indeed valuable.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.13 no.3 s.31
• /
• pp.259-267
• /
• 1989

In this paper, the fabric specimen undergoes repeated laundering under given condition. After this cyclic laundering was applied, the crease recoveries of the specimen were measured using shirley crease revovery tester in order to evaluate the effect of factors at given condition during crease deformation. 5 samples of grey plain cloth were desized, alkali-scoured, bleached, whased with water, and air-dried. All tests were made on samples preconditioned to $65\%\;RH\;and\;20^{\circ}C$. The experimental results were analysed statistically to relate crease recoveries and the properties of smaples, recovery periods (time) of crease. Furthermore, the crease recoveries of core-spun yarn woven fabrics were discussed in comparison with those values for $100\%$ combed cotton yarn woven fabric and $65\%$ polyester $35\%$ carded cotton blended yarn woven fabric. The results obtained are as follows; 1. Regardless of materials, remarkable decrease are observed in crease recoveries about 1-5 cycles of the repeated laundering, but slack decrease are observed in crease recoveries after 5 cycle of the re-peated laundering. 2. Crease recoveries ($\alpha$) of core-spun yarn woven fabrics are relate to recovery periods (t) of crease as follows; log$\alpha$=0.01415 log t+2.1168 ($r^2=0.94$) 3. Core-spun yarn woven fabrics were superior to $100\%$ combed cotton yarn woven fabrics and $65\%$ polyester $35\%$ carded cotton blended yarn woven fabric in crease recoveries. 4. Crease recoveries ($\alpha$) of core-spun yarn woven fabrics are relate to cover factor (CF), thickness (T) at pressure 0.5 $gf/cm^2$, weight (W) as follows; log$\alpha$=-0.3482 log CF-0.4924 log T-0.4727 W+2.4243 ($r^2=0.88$) 5. Crease recoveries ($\alpha$) of core-spun yarn woven fabrics are relate to 2HB/B, 2HB/W, $\sqrt[3]{B/W}$, WC/T which are concerning to formation of weared clothes and bending Iran formation behavior as follows: log $\alpha$=0.0091 2HB/B+0.4667 2HB/W+0.0185 $\sqrt[3]{B/W}$+0.0114 WC/T+1.8433 ($r^2=0.86$)