• Journal of IKEEE
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• v.22 no.3
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• pp.774-779
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• 2018

This paper presents fragile watermark system using quantization and DC coefficients. It is a way to prevent the watermark fro, being detected if the original has been modified in any way. In other words, the detection of a watermark ca be said to be originality after the watermark is inserted, without any damage. Since lossy compression such as JPEG is often allowed or required in practical applications, authentication methods, authentication methods should be distinguished from malicious modifications such as image shifting, cropping, filtering, and replacement. The proposed algorithm implements a fragile watermarking algorithm that shows image authentication with JPEC compression and the watermark easily breaks other malicious variants.

• Journal of the Korean Society of Costume
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• v.58 no.5
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• pp.51-70
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• 2008

The purpose of this study is not to look at the history of traditional accessories or the characteristics of their shapes but to discern imitations ￡Tom authentic items by exploring imitations of traditional accessories-- many of which were made in the late 20th century -- from private museums and university museums in order to help scholars assess relics. Among many kinds of accessories in the Joseon dynasty, only norigae, one of the representative accessories, and women hair ornaments are selected for this study since many of the relics have been recovered to date. Given this, this study will consider firstly the general history of norigae and women's hair ornaments, and secondly, prove several examples as relics from the late 20th century while they are marked as relics from the Joseon dynasty by comparing authentic items. Thirdly, among the imitations of the late 20th century, this study will find those so-called "original" imitations whose production origins are unidentified Fourthly, this study will explore the imitations, which were influenced by the influx of items and materials from China. It is important to discern low-quality relics as well as to correct the production time. Some producers exercised their creativity and made relics non-native to Korea. These relics shouldn't be presented at international exhibitions. Restored relics should be noted so and their quality should be equal to the authentic items. It is suggested that relics without the identity and quality of native Korean relics not baffle cultural interchanges and enhance national glory.

• Korean Journal of Food Science and Technology
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• v.42 no.5
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• pp.627-631
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• 2010

The allergenicity of soybeans was analyzed using polyclonal antibodies and the blood sera of patients with soybean allergy, using fourteen different varieties of soybeans that are consumed in Korea. The study that used polyclonal antibodies having specificity for soybeans showed that while some of the fourteen varieties of soybeans contained additional protein bands indicating antigenicity, others lacked such bands, and the most antigenic protein was found in Jinpum soybeans. In comparing blood sera reactivity of four patients having soybean allergies, who had antigenicity values of 65U/ml or more according to CAP testing, the soybean varieties of Danbaek and Shinpaldal2 had the most reactivity and Daewon had the least. The result that the allergenicity of proteins in soybeans differs according to the variety of soybean, leads to the conclusion that it may be possible to reduce consumer allergic reactions to soybean products by choosing an appropriate variety of soybeans.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.4
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• pp.117-134
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• 2010

A passive RFID tag which received attention as a future technology for automatic and quick identification faces some difficulties about security problems such as tag authentication, reader authentication, data protection, and untraceability in addition to cost and reliable identification. A representative passive RFID technology is the ISO/IEC 18000-6 Type C which is an international standard for 900 MHz UHF-band. This standard has some difficulties in applying to the security services such as originality verification, tag's internal information protection, and untraceability, because it does not provide high-level security solution. In this paper, we summarize security requirements of ISO/IEC ITC 1/SC 31 international standardization group, propose security protocols suitable for the UHF-band passive RFID system using a crypto engine, and analyze its security strength. In addition, we verify that it is possible to implement a tag conforming with the proposed security protocols by presenting concrete command/response pairs and cryptographic method.

• Korean journal of food and cookery science
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• v.17 no.1
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• pp.65-79
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• 2001

The effects of ${\alpha}$-chymotrypsin and trypsin treatments on the functional properties (degree of hydrolysis, solubility, and emulsifying capacity) of the soy protein isolate prepared from Jinpum soybean milk(JS milk) which has been developed as low lipoxidase-active soybean variety in Korea and extracted from commercially defatted soybean meal milk(DSM milk). The mixing ratios of JS milk to DSM milk were adjusted to 10:0, 7:3, and 5:5, respectively. The general quality attributes(yield, pH, titrable acidity, moisture contents, crude protein contents, color, textural properties, and sensory characteristics) of soybean cheese which has been prepared with the resulting soy protein hydrolysates were evaluated. Jinpum SPI was better subjected to trypsin than ${\alpha}$-chymotrypsin hydrolyses as indicated by better solubility and emulsifying capacity of the hydrolysates. The degree of hydrolysis and solubility of Jinpum SPI were higher than the soybean isolates from DSM milk. The increased ratios of DSM milk in the mixture resulted in the reduced yields and crude protein content along with the lowered titratable acidity while the pH values and moisture contents showed the opposite trends. In color characteristics, the increased amount of DSM milk brought about the significantly lower Hunter color reflectance values of lightness of the cheese products, along with the higher redness and total color difference value(ΔE). However, the enzyme treatment alone was not enough to cause any color differences. The increased ratios of DSM milk also caused the significantly lowered textural parameters such as hardness, adhesiveness and cohesiveness of the soybean cheese. Between the enzyme treatments, the ${\alpha}$-chymotrypsin treated samples resulted in the higher hardness and cohesiveness values of the products than those from the trypsin-treated ones. In organoleptic properties of the product, the better mouthfeel and overall quality scores were obtained from the trypsin treatments as compared with those from the ${\alpha}$-chymotrypsin ones. The mixing ratios of 10:0 and 7:3 were more favored than that of 5:5 as far as mouth-feel, yellowness and overall quality of the products were concerned. On the overall, the mixing ratio of 7:3(JS milk: DSM milk) and the trypsin treatment of the mixture was recommended for better manufacturing of high-quality soybean cheese.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.6
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• pp.479-483
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• 2003

Knowledge of N accumulation during the vegetative growth stage of rice (Oryza sativa L.) is useful for determining the need for topdressing fertilizer N at panicle initiation and booting stage. The chlorophyll content showing SPAD threshold values generated by a simple and portable diagnostic instrument, chlorophyll meter, enables implement the measures of greenness and/or relative chlorophyll contents of leaves. Two-year field experiment was conducted to evaluate the possible application of the chlorophyll meter for N diagnosis in transplanted paddy rice. The chlorophyll meter threshold values (SPAD reading) were taken from uppermost fully expanded leaves at 10days interval from 10 days after transplanting. SPAD readings and N contents of rice leaf blade were closely related at the maximum tillering stage. SPAD readings during growth period showed M-shaped distribution, sharply finished to drop at 20 days after heading date. As N fertilizer increased, the SPAD readings increased. The SPAD readings showed more critical and clear difference in immature paddy field than in ordinary paddy field, where the former soil showed higher response to N fertilizer topdressed. Based on the PAD readings for obtaining an optimum sink size bearing the maximum grain yield, N fertilizer to be dressed at the panicle initiation stage is to be adjusted within the SPA$\times$tillers value range 888 in ordinary paddy, and 800 in immature paddy vice. Among the cultivars tested, Huckhyangbyeo, Jinpumbyeo, Ansungbyeo, Sobibyeo, Manpungbyeo, Sangmibyeo, Jinbongbyeo, showed high SPAD values, whereas the cultivars, Nonghobyeo, Saechuchungbyeo, Hwabongbyeo, Mananbyeo, did low values and others intermediate SPAD threshhold values.

• Korean Journal of Medicinal Crop Science
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• v.16 no.1
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• pp.20-26
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• 2008

Anemarrhena asphodeloides (Korean name "Ji-Mo") has been used for oriental medicinal purposes in Korea, China and Japan. In this study, 29 A. asphodeloides samples were collected including 3 certified A. asphodeloides plants and many commercially marketed A. asphodeloides products. Chloroplast trnL-F regions of the "Ji-Mo" samples were sequenced and used to identify whether the samples were genuine A. asphodeloides or not. As the result, the trnL-F sequences of all the "Ji-Mo" samples were shown to be identical and it was proven that commercially available medicinal products "Ji-Mo" are genuine A. asphodeloides. Phylogenetic tree of. A. asphodeloides using the trnL-F sequences was constructed and compared with phylogenetic tree using rubisco large subunit (rbcL) gene sequences. In these tree, A. asphodeloides was affiliated in the family Agavaceae in the order Asparagales. It is proven that trnL-F phylogenetic tree is useful to study taxonomic position of A. asphodeloides.

• Journal of the Korean Society of Food Culture
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• v.6 no.2
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• pp.223-228
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• 1991

In the 7th century, Prince Shoudoku built the Horyu temple at Nara, when Buddhist culture in Japan had highly prospered after Buddhism were transmitted to Japan from Korea. At the same time, the three ancient country of Silla, Koguryo, and Baekjae had generally effected on Japanese culture and life as well as Buddhist events, religious services and sacrificial offerings in form. And even now there are kept above one thousand of tablewares which was used at the age and was made of wood and alloy manufactures from Han peninsular in Seisoin at Nara. Through these historical backgrounds, it could be presumed that the religious services and the sacrificial offerings for Prince Shodoku for above 1300 years help us to study and estimate the ancient dietary culture of Korean and Japanese. There are several points of similarities which are remained and maintained in Han Peninsular. 1. They used high filling method of the secrificial offerings and high receptacles in the religious service. 2. The cakes were mainly made of nonglutinous rice tharr glutinous rice 3. They decorated the pheonix instead of flowers and the other kinds of birds in Korea. 4. Kakiage of fried confectionary was founded in many kinds of them at present.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.8
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• pp.1149-1155
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• 2010

This study was conducted to investigate the changes of quality characteristics, and mineral, oxalate and phytate content during soymilk process. The yields of soymilk ranged from 8.43 mL/g in Bokwangkong to 9.15 mL/g in Bongeuikong and Hannamkong, and total soluble solid contents were ranged from $4.37^{\circ}Brix$ in Anpyeongkong to $7.17^{\circ}Brix$ in Bongeuikong, respectively. The pH and total acidity of soymilk ranged from 6.43 to 6.86 and from 1.48% to 1.65%, respectively. The viscosity of soymilk was the highest value of 20.80 cP in Hannamkong and the lowest value of 15.73 cP in Dawonkong. The highest value of calcium content of soymilk was 1.589 mg/g in Seonheukkong, and oxalate and phytate in soymilk were high at 2.14 mg/g in Hannamkong and 2.18 mg/g in Anpyeongkong, respectively. The transfer ratio of oxalate from soybean to soymilk was the highest value of 77.6% in Jinpumkong 2, and one of the phytate was the highest value of 87.5% in Dongpuktae and the lowest value of 13.9% in Hojangkong.

• Korean Journal of Plant Resources
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• v.29 no.1
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• pp.143-153
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• 2016

Plant regeneration via organogenesis and somatic embryogenesis was investigated in Korean soybean cultivars including Cheongja 3, Jinpumkong 2, Taekwangkong and Uram. Cotyledon, cotyledon+hypocotyl and hypocotyl segments of 7-day-old seedlings were cultured on MS medium containing various concentration (0, 1, 2 and 4 ㎎/L) of BA and TDZ. The results showed that MS medium supplemented with BA 2.0 ㎎/L yielded the highest shoot formation ratio of 83.3%. In 4 cultivars, Taekwangkong showed the highest ratio of shoot formation. When various sizes of immature cotyledons (S: 1∼ 2 ㎜, M: 3∼5 ㎜, L: 6∼8 ㎜) were tested on MS medium containing 2,4-D 40 ㎎/L for somatic embryogenesis, the optimum size for embryogenic callus induction was 3∼5 ㎜ in length of immature cotyledons. In 4 cultivars, Taekwangkong showed the highest percentage of embryogenic callus induction. The results indicate that Taekwangkong is the best soybean cultivar for plant regeneration via organogenesis and embryogenic callus induction among the 4 cultivars.