• Journal of Magnetics
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• v.20 no.3
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• pp.201-206
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• 2015

Using the Vienna ab initio simulation package (VASP) incorporating both semiempirical and nonlocal van der Waals interaction, the structural, adsorption, and magnetic properties of Ni/BN/Co systems were investigated. We proposed that the relative spin direction of Ni and Co magnets can be easily tuned, because the total energy difference between ferromagnetic (FM) and antiferromagnetic (AFM) states is small. Despite this feature, very interestingly, both Ni and Co layers manifest half-metallic state, whereas the spacer BN layer becomes weak metal for one monolayer (ML) thickness and an insulating barrier for two ML thicknesses. The half-metallic behavior of the magnetic layers seems very robust, because it is independent of the magnetic coupling between Ni and Co. This finding indicates that the Ni/BN/Co system can be used as a potential candidate for tunneling magnetoresistance system.

• Journal of the Korean Vacuum Society
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• v.1 no.1
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• pp.96-99
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• 1992

The microanalysics by the direct observation of 180 (P, a)'" nuclear reactions on tungsten (110) surfaceare investigated using a 2MeV Van de Graaff accelerator. This method allows the determination of very smallquantities of nuclei near the surface of samples. The yields increase with oxygen exposure. The oxygen coverage, 0, is 0.5 at 5 Langmuir and 1.0 at 15 Langmuir.5 Langmuir.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.74-75
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• 2000

핵산의 생합성은 salvage합성이 우선되며 이 경우 섭취된 음식물유래의 핵산등이 이용되므로 섭취되는 핵산의 영양학적 가치는 매우 높다(송영정사, 1995). Van Buren이나 Kulkarni등은 mouse에의 핵산 경구투여가 면역능을 개선하여 세균감염에 대한 방어에 유효하다고 보고하였고(Van Buren C.T et al, 1983, Kulkarni A.D et a 1986), 이들의 연구가 계기가 되어 섭취 핵산의 유용성에 대한 연구보고가 계속적으로 행하여지고 있는데 그 생리활성을 살펴보면 세포부활작용(Matsunaga et al, 1987) 면역증강작용(Frederic B. Rudolph, 1994) 과산화지질 형성억제작용(Uauy R et al 1985), 장내균총 및 지질대사의 개선작용(Uauy R, 1994, Angel Gil et al, 1986)등이다 본 연구에서는 부산물로 폐기되어지는 참치정소를 이용하여 핵산복합물질을 분리·정제하는 방법 및 그 추출물의 생리활성을 연구하므로써 새로운 기능성 소재로서의 이용가능성을 탐색하였다. (중략)

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.703-705
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• 2001

전통 EDI(Electronic Data Interchange) 문서는 VAN(Value Added Network) 전용망을 통하여 EDI 서비스를 하였다. 하지만, 이것은 실시간(real-time)으로 문서를 처리하는 방식보다 주로 배치(batch)방식으로 한꺼번에 문서를 처리하였으며 전용 소프트웨 어를 사용함으로써 새로운 문서를 처리할때마다 새 문서에 대한 정보를 등록하고 소프트웨어를 다시 설치 해야하는 불편함도 있었다. 기존의 전통 EDI 문서는 VAN을 통하여 처리하는 방식이었으나 현재는 인터넷에서 EDI 문서를 볼 수 있도록 하기 위해 XML(extensible Markup Language)을 이용하고 있다. 인터넷기반의 웹 브라우저 상에서 볼 수 있는 XML/EDI 구현에 힘입어 여러 문서로 분리되어진 EDI 문서를 XLink의 개념을 이용하여 문서의 삽입, 삭제 기능과 이러한 문서를 통합하여 하나의 문서로 데이터베이스에 저장할 수 있는 방법에 관하여 연구하고자 한다.

• Journal of the Korean Chemical Society
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• v.44 no.6
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• pp.587-591
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• 2000

Many theories have been suggested to obtain an equation of state for polymeric liquids. Most of them are based on the concepts of cell, hole, free volume or lattice etc. One of the most succesful theories is an equation of state theory of Flory and his coworkers based on the concept of free volume. In this work, van der Waals potential used in Flory's theory was modified, giving a new equation of state for polymeric liquids. The calculated results showed that the new equation of state gave better agreement with experimental PVT data than Flory's theory.

• Phonetics and Speech Sciences
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• v.2 no.2
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• pp.27-36
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• 2010

The purpose of this study is to investigate the features of Korean infants' vocalizations according to the stages models. A total 88 infants, whose ages range from 1 to 18 months, participated in this study. This age is a critical period for vocal development. However, the study of infants' vocalizations has typically focused on children over the age of two. Because of restrictions related to the study of younger infants, from birth to the age of two, it is usually difficult to investigate what are the major features of their vocal development. Therefore, this study provides documentation and analysis of the features of infant vocalization and their vocal development stages. The results shows that the stages model of Oller & Lynch (1992) might be adapted for Korean infants' vocal development. Furthermore, the features of the infants' vocalization are not linearly appeared one stage to the next stage, but are overlapped (Koopmans-van Beinum & van der Stelt, 1986; Nathani et al., 2006; Oller, 1980; Stark, 1980; Vihman, 1996).

• Journal of Microbiology and Biotechnology
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• v.18 no.5
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• pp.942-945
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• 2008

There have been concerns about possible pathogenicity and antimicrobial resistance in Enterococcus, which constitute more than 50% of probiotics in the worldwide market. In this study, Enterococcus in sixteen products manufactured by ten different companies was tested for the presence of six virulence genes and two vancomycin resistance genes. Results in this study showed the safety of Enterococcus on the Korean market and the importance of screening vanA, vanE, agg, cylA, esp, and gelE. Pulse-field gel electrophoresis showed that the sixteen isolates tested in this study are originated from three strains.

• Bulletin of the Korean Chemical Society
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• v.12 no.4
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• pp.397-403
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• 1991

Dissociation of a highly excited diatomic molecule in the Ar + Ar…$O_2$ and Ar + $O_2$ collisions is studied using trajectory dynamics procedures in the collision energy range of 0.050 to 1.0 eV. Between 0.050 and 0.2 eV, dissociation probabilities are very large for the complexed system compared to the uncomplexed system. This efficient dissociation of $O_2$ in Ar…$O_2$ is attributed to the ready flow of energy from the incident atom to the large-amplitude vibrational motion of the excited O2 via the van der Waals bond. Thermal-averaged dissociation probabilites of $O_2$ in Ar + Ar…$O_2$ near room temperature are nearly two orders of magnitude larger than those of $O_2$ in Ar + $O_2$.

• SUVANNABHUMI
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• v.16 no.1
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• pp.147-173
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• 2024

Nguyễn Huy Thiệp is a pillar in Vietnamese cultural life after the Second Indochina War, and the fates of men and women at the beginning of Đổi mới (Renovation) is one of the prominent themes in his short stories. To show off sexual power, seek glory, and maintain his dominant position, Thiệp's heroes engage in a game of oppressing the weak, hunting animals, and harassing women. However, due to the complex changes in social life, moral values, and gender inequality, men in the postwar period quickly experienced the feeling of humiliation, impotence, and failure. In turn, the sophisticated aspects of masculinity demonstrate the cultural and ethical concerns of contemporary Vietnamese society. By exploring the multidimensional nature of masculinity expressed in Thiệp's stories, this study aims to resolve misconceptions about gender and the relationship between men and women in his work.

• Journal of the Korean Chemical Society
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• v.22 no.2
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• pp.86-94
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• 1978

The crystal and molecular structure of theophylline hydrochloride has been determined from X-ray data by Patterson techniques. The structure has been refined by block-diagonal least-squares and Fourier synthesis on three dimensional data. The unit cell is orthorhombic, space group $P_{na21}$, with a = 14.01, b = 11.49, c = 6.77${\AA}$, and contains four molecules. The final R value based on 743 observed reflexions is 12.2%. The intramolecular distances are similar to those in other compounds containing a purine or pyrimidine group. The molecules are nearly planar and are stacked in layers parallel to the (001)plane. The chlorine atom is coordinated to N(1) atom at a distance of 3.06${\AA}$. The structure is stabilized mainly by van der Waals interactions; however, a short N${\cdot}{\cdot}{\cdot}$Cl contact of length $3.06\AA$, which is slightly less than the expected van der Waals separation, suggest that weak charge transfer interaction may be present. The relationship between this structure and the known structures of theophylline monohydrate and caffeine monohydrate are discussed.