• Journal of the Korean Chemical Society
• /
• v.38 no.1
• /
• pp.1-7
• /
• 1994

Semiempirical MNDO calculations are employed to study ionicity of OH groups and stability in $T_1-OH-T_2bridges(T_1$ = Al, B and $T_2$ = P, Si) such as found in aluminophosphate family($AlPO_4-5$, BAPO-5, and SAPO-5) molecular sieves. Dimeric model clusters of Al-OH-P, B-OH-P and Al-OH-Si bridges were considered. It is shown that the elongation of the T-O bond, upon replacement of Al by B, occurs preferentially by a local deformation of the Al-O-P bridge. But the elongation of the T-O bond occurs preferentially by a rotation of Al-O-Si bridge upon substitution P for Si. Also, the ionicity of OH groups and stability increase in order to B-OH-P < Al-OH-P < Al-OH-Si bridge.

• Journal of the Korean Chemical Society
• /
• v.37 no.11
• /
• pp.929-936
• /
• 1993

Charge transfer complexes of some electron donors with one electron acceptor have been studied to investigate the maximum absorption wavelength and absorbance by UV-Vis spectrometer in three kinds of solvents, such as ethylene chloride, methylene chloride, and chloroform, at the temperature ranges of 16∼25$^{\circ}$C. 1,2,3,4-Tetrahydrocarbazole (THC), 2-methyl, 3-methyl, and 3-ethyl THC were selected as electron donors while chloranil was used as an electron acceptor in this study. It is found that these complexes forms 1 : 1 complexes, and their maximum absorbance and formation constants decreases with respect to the function of the polarity of solvent and temperature. The polarity of solvents and the temperature have been influenced on the formation constants, which were described using the thermodynamic properties. Moreover, the electronic and steric effects of electron donors have also been effects.

• Journal of the Korea Society of Computer and Information
• /
• v.9 no.4 s.32
• /
• pp.157-165
• /
• 2004

The paper suggests that web-server security management system will be able to detect the web service attack accurately and swiftly which is keeping on increasing at the moment and reduce the possibility of the false positive detection. This system gathers the results of many unit security modules at the real time and enhances the correctness of the detection through the correlation analysis procedure. The unit security module consists of Network based Intrusion Detection System module. File Integrity Check module. System Log Analysis module, and Web Log Analysis and there is the Correlation Analysis module that analyzes the correlations on the spot as a result of each unit security module processing. The suggested system provides the feasible framework of the range extension of correlation analysis and the addition of unit security module, as well as the correctness of the attack detection. In addition, the attack detection system module among the suggested systems has the faster detection time by means of restructuring Snort with multi thread base system. WSM will be improved through shortening the processing time of many unit security modules with heavy traffic.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2002.11b
• /
• pp.68-68
• /
• 2002

아열대성 식물 4종 (문주란, Crinum asiaticum var. japonicum; 박달목서, Osmanthus insularis; 죽절초, Chloranthus glaber; 파초일엽, Asplenium antiquum)을 대상으로 자연 환경요인의 변화에 따른 엽록소형광을 분석하여 이들 식물의 활력도를 검토하였다. 여름철 일변화에 있어서 양지에 자라는 문주란과 박달목서는 Fv/Fm이 새벽과 밤에는 0.80~0.83 범위의 높은 값을 보이지만, 낮시간에는 0.65~0.73으로 낮았다. 1-qN과 1-qP도 낮시간에 크게 낮아졌다. 음지에 자라는 죽절초와 파초일엽의 Fv/Fm은 높아서 0.83~0.85 범위를 유지하였으며 일변화적 특성은 관찰되지 않았다. 1-qP의 변화는 거의 관찰되지 않았으나 1-qN이 낮시간에 다소 감소하는 경향을 보여주었다. 죽절초와 파초일엽에서는 광억제가 거의 일어나지 않으나 문주란과 박달목서에서는 낮시간의 고광에 의한 광억제가 나타난다. 하지만 여기에너지의 일부를 열의 형태로 방출하여 광피해를 완화시키고 있는 것으로 보인다. 겨울철에는 Fv/Fm이 모든 종에서 0.8 이하의 값을 나타내었는데, 특히 문주란의 Fv/Fm 값은 다른 3종 보다 더 낮았다. 그리고 모든 종에서 일변화적인 특성은 관찰되지 않았다. 문주란의 1-qN은 낮시간에 다소 감소하였지만, 나머지 3종의 식물은 높은 값을 나타내었다. 그리고 l-qP는 문주란과 박달목서에서는 낮시간에 0.6 범위로 낮아졌다. 이는 종에 따라 차이가 있지만 겨울철 저온의 영향을 받은 결과로 보인다. 한편, 여름철 문주란과 박달목서의 O-J-I-P곡선은 거의 유사하며 낮에 뚜렷하게 낮았고, 죽절초와 파초일엽에서는 일변화적 특성은 두드러지지 않았다. 그리고 P $I_{NO}$ 와 SF $I_{NO}$ 가 죽절초를 제외한 3종에서 여름철 낮시간에 증가하였다. 겨울철의 O-J-I-P곡선은 모든 종에서 낮시간에 다소 낮아지지만 큰 변화는 없었다. 그리고, 문주란, 박달목서, 파초일엽에서 $\psi$o/(1-$\psi$o)가 낮시간에 다소 증가하였다. 이로부터 P $I_{NO}$ , SF $I_{NO}$ , $\psi$o/(1-$\psi$o)등의 변수는 식물의 활력도를 검정하는 지표로 활용될 가능성이 높다고 할 수 있다.

• Journal of Dairy Science and Biotechnology
• /
• v.35 no.2
• /
• pp.105-111
• /
• 2017

There have been numerous reports indicating that milk proteins influence immune functions. Colostrum refers to the breast milk of mammals, secreted starting from the fourth or fifth day after delivery. It has abundant nutrition for the survival of newborn infants. Most importantly, it contains bioactive substances with growth-stimulating and antibiotic, functions. Thus, the colostrum has various physiological roles. This study measured the differences in the composition of colostrum derived from dairy cattle, hanwoo, porcine, and goat sources. The results showed that immunoglobulin, lactoferrin, lactoperoxidase, serum albumin, IgG heavy chain, and IgG light chain were significantly higher in the colostrum of dairy cattle, hanwoo, and goats, but low in porcine colostrum. There was no significant difference in ${\alpha}_{S2}$-casein, ${\alpha}_{S1}$-casein, ${\beta}$-casein, ${\kappa}$-casein, ${\beta}$-lactoglobulin, and ${\alpha}$-lactalbumin contents until seven days after birth. However, porcine colostrum showed high contents of all proteins from the first day to the second day after delivery.

• Science of Emotion and Sensibility
• /
• v.13 no.1
• /
• pp.279-284
• /
• 2010

This paper surveys basic research for data base system of the fabric structural design. For this purpose, the weave density coefficients of the worsted and cotton fabrics are analysed and discussed with cover factors suggested by Prof. Walz and Picanol company. And the relationship between weave density coefficients and cover factors of the worsted and cotton woven fabrics was analysed and discussed with weave pattern and yarn count. Finally, the process shrinkages of dyeing and finishing processes according to the weave density coefficients of the worsted and cotton fabrics were analysed and discussed as a preliminary study for the data base system of the fabric structural design. As a result, the density coefficients, K values of the worsted and cotton fabrics were ranged from 600 to 1000, and the weave density coefficients of those fabrics are ranged from 0.4 to 0.8 and from 0.2 to 1.0, respectively. The finishing shrinkages for the worsted fabrics are ranged from 2% to 10%, and for cotton fabrics, it was from 2% to 20%. The weave density coefficients of the worsted and cotton fabrics could be distributed according to the looms, weave pattern and weaving and finishing shrinkages as a concept of the data base for the fabric structural design.

• Science of Emotion and Sensibility
• /
• v.17 no.1
• /
• pp.93-104
• /
• 2014

This paper investigates the physical properties such as water absorption, drying and hygral expansion of moisture responded transformable fibers and their knitted fabrics including dyeing characteristics according to the different dyeing time and temperature. For this purpose, three kinds of covered filament yarn specimens using HEF and spandex as core and PET, aerocool as a covering filament were prepared. The knitted fabric specimens were made using three kinds yarn specimens and dyed with different dyeing temperature and time. The moisture absorption, drying and hygral expansion of three kinds of knitted fabric specimens were measured and discussed with yarn structure. The wearing performance of these knitted fabric specimens were also measured and discussed with yarn characteristics using FAST system. Finally, the dyeing characteristics such as dye affinity, color difference and color fastness to washing of these knitted fabric specimens were measured and discussed with different dyeing temperature and time for examining dyeing process performance of these moisture responded transformable knitted fabrics.

• Korean Journal of Ichthyology
• /
• v.28 no.1
• /
• pp.52-56
• /
• 2016

A single specimen (700 mm in disc length) of Plesiobatis daviesi, belonging to the family Plesiobatididae, was firstly collected in the north-eastern coastal waters of Jejudo Island, Korea by using a bottom trawl on 24 October 2010. This species was characterized by having five pairs of gill openings, tail with one to three large spines, long snout length, long caudal fin, and pleated margin of nasal curtain. It is morphologically similar to Urolophus aurantiacus, but the former is distinguished from the latter by having longer caudal fin and snout length. We add P. daviesi to the Korean fish fauna and suggest the new Korean names, "Gin-kko-ri-huin-ga-o-ri-gwa", "Gin-kko-ri-huin-ga-o-ri-sok" and "Gin-kko-ri-huin-ga-o-ri" for the family, genus and species, respectively.

• Journal of Korean Home Economics Education Association
• /
• v.32 no.3
• /
• pp.49-61
• /
• 2020

This study examined the factors related to drinking, health, and food habits of college students before and after participating in the activities of temperance club. The survey was conducted on 97 college students who participated in the temperance club. Scores on 'daily amount of alcohol drinking(p<.05)' and 'drinking expenditure(p<.05)' were significantly lower after temperance club participation. Drinking knowledge(p<.05), and health-related factors including 'concerns about health(p<.05)', 'health condition(p<.05)', and 'times of exercise(p<.05)' were significantly higher after temperance club participation. Food habits score was significantly higher after temperance club participation(m=46.0 vs. m=48.8, p<.01). The scores on 'I have three meals a day(p<.01)', 'I don't eat junk foods often(p<.05)', and 'I don't eat out often(p<.05)' were significantly higher after temperance club participation. Particiating in temperance club activities improved the factors related to drinking, health, and food habits. Therefore, we would like to provide the results of this study as basic data for creating a healthy drinking culture.

• Journal of Korean Library and Information Science Society
• /
• v.48 no.1
• /
• pp.21-42
• /
• 2017

This study reports the result of the survey on collection management from 154 school libraries in Korea. The questionnaire is consisted of three section: state of collection, state of book use, and collection management system. Results reveal that (1) elementary schools and middle schools have many books for each student compared to the KLA's School Library Standards; (2) the component ratio of literature books is the biggest in school library collections; (3) the ratio of library book use is overwhelmingly higher in elementary schools than middle schools and high schools; (4) 64.6 percent of library books in the sample are never used during 2013-2015; (5) 74 percent of libraries have its own collection management document; (6) Almost all schools compose its own committee for library management, the committee plays an important roles in the communication among school members, collection development and promotion.