Structure theorem for ultradistribution with support at one point

Chung, Jaeyoung 群山大學校基礎科學硏究所 1994 基礎科學硏究 Vol.9 No.-

Applying the Paley-Wiener Theorem for ultradistributions we will give a new and very short proof of the structure theorem for ultradistributions with support at one point and the Borel Theorem.

Identifying Multiple Outliers in a Normal Sample by Coverages

Kim,Hyun Chul 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

우리는 정규분포에서 얻은 표본에서 다중이상점을 식별하는 두 가지 방법을 제안하고 있다. 이 방법들은 더욱 정밀한 검정을 위한 이상점의 수를 먼저 추정하는데 적절한 방법이며, 손쉽게 사용할 수 있는 편리한 방법이다. 이 것은 gaps test보다 개념적으로 더욱 발전된 것이다. 우리는 모의실험을 통해 몇 가지 유의수준에서 사용할 수 있는 임계값도 함께 제시했다.

혼합된 칼라 잡음 제거를 위한 조건적인 퍼지 클러스터 필터

엄경배,한서원 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

Color image is more powerful than gray one in human visual perception. Therefore, color image processing becomes important area. Color images are often corrupted by noises due to the input sensor or channel transmission errors. Some filtering techniques such as vector median, mean filter, and vector α-trimmed mean filter have been used for color noise removal. Among them, vector α-trimmed mean filter gave the best performance in the mixed color noise. But, there are edge shift and blurring effect, because vector α-trimmed mean filter is uniformly processed across the image. So, we proposed the conditional fuzzy cluster filter to improve this problems. Simulation results showed that the proposed scheme improves the NCD measure and visual quality over the conventional vector α-trimmed mean filter in the mixed color noise.

Pd (Ⅱ)과 N.N-Dimethylaminoazobenzene 과의 착물형성과 반응성 고찰

김은수 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

아세토니트릴(CH₃CN) 및 메틸알코올(CH₃OH)과 그 혼합 용매에서 Pd(Ⅱ)과 N,N-dimethyaminoazobenzene(DMAB)을 반응시켜 배위화합물의 반응성을 고찰하였다. 15∼35℃의 온도범위에 걸쳐 UV-vis 흡수 분광법을 이용하여 착물의 특성에 따라 반응이 ΔH, ΔS에 의하여 조정되는 경향을 알게 되었으며 용액내에서 이온종의 거동은 비전해질 처럼 되어 있었으며 Pd(Ⅱ)와 DMAB의 결합 조성비가 1:1임을 알게되었다. 문헌과 실험의 결과를 종합하여 예측한바 Pd(Ⅱ),d8 이온은 전형적인 사각 평면 구조의 형태를 알게 되었다. The complex of Pd(Ⅱ) with p-dimethylaminoazobenzene(DMAB) was studied in acetonitrile, methanol and acetonitrile-methanol mixture solvents. Various thermodynamic properties were obtained using UV-vis. spectroscopy at temperature range 15∼35℃. The spectroscopic results showed that the reactivity and the reaction rate were controlled by △H, △S. The behavior of the ionic species was studied by a conductometric method, and the ratio of the metal to ligand was found to be 1:1. The structure of the complex was predicted observing the changes in characteristic Raman bands.

수리계획과 시믈레이션과의 관계

박용성 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

We can think of the relationship between a mathematical programming and a simulation from two points of view a simulation as in the broad sense and a simulation defined in a limited sense a discrete type. We used the difference between the two methods as an aid and a model frame. We gripped the time of use, the application, and the consideration of simulation. In addition, we used a concrete example by optimizing a supplementary simulation of a mathematical programming's weak point.

Cu-Mg 페라이트에서의 biquadratic 초교환 상호작용

윤성현 群山大學校基礎科學硏究所 1998 基礎科學硏究 Vol.13 No.-

Superexchange interactions of Cu0.6 Mg0.4 Fe₂O₄ has been studied by Mossbauer spectroscopy and X-ray diffraction. The crystal structure is found to be a cubic spinel with the lattice constant a0=8.3717±0.0005Å. The iron ions are in ferric states. The temperature dependence of the magnetic hyperfine fields of 57Fe nuclei at both the tetrahedral (A) and octahedral (B) sites are analyzed by including a biquadratic term, ??, in addition to the usual bilinear one, ??, in the exchange energy. The dominant bilinear exchange interaction is found to antiferromagnetic, and its strength is J AB=-1.2kb. The other two bilinear superexchange interactions are quite weak: JAA=-1.26kb and JBB=2.9kB. The strength of the biquadraic exchange interaction is also weak: jAB=0.6kB. The Neel temperature of the sample material is found to be 695 K.

ON DECOMPOSITIONS OF MODULES

Joo,Chang Keun 群山大學校基礎科學硏究所 1999 基礎科學硏究 Vol.14 No.-

In this sort paper we investigate some properties about deep decomposition of modules and prove a theorem (Theorem2.4) ; the converse of Theorem A-(ii) which is introduced by S.McAdam.

Chlorine Substitution Effect on the Y-Ba-Cu-O Superconductor

Kim, Dong Hee,Choi, U-Sung 群山大學校基礎科學硏究所 1992 基礎科學硏究 Vol.7 No.-

Extended Huckel 분자궤도법을 사용하여 0(1)위치와 0(4)위치에 선택적으로 Cl 원자를 치환시킨 Y-Ba-Cu-O 초전도계에 대하여 전자구조와 성질을 연구하였다. 산소 이온에 대한 염소 이온의 치환은 산소(1)법의 위치가 산소(4)의 위치보다 잘 일어남을 알 수 있었다. Using the extended Huckel molecular orbital calculation, we have studied the electronic structure and properties of Y-Ba-Cu-O superconductor systems in which the O(1) and O(4) sites were selectively replaced by Cl atoms. Substitution of O ions by the chlorine ions was found more favorable at sites in the O(1) sites than in the O(4) sites in Y-Ba-Cu-O clusters.

韓國産 강달이屬 Collichthys 魚類의 分類學的 再檢討

李忠烈 群山大學校基礎科學硏究所 1992 基礎科學硏究 Vol.7 No.-

우리나라 西海沿岸에서 주로 많이 출현하는 Collichthys屬 어류를 蒐集하여 이들의 分類學的 位置와 種間 形態學的 特徵을 조사하였다. 지금까지 韓國産 Collichthys屬 어류에는 C. lucidus, C.fragilis, C. niveatus의 3種으로 보고되어 왔으나 많은 文獻의 記載와 표본들을 중심으로 면밀히 재검토한 결과 C. ludicus와 C. fragilis는 同一種으로 동정되어 한국산 Collichthys속 어류는 C. lucidus는 C. niveatus의 2종으로 분류되었다. 이들 종간의 형태적 특징은 C. lucidus 에서는 後頭部의 계관상 돌기의 前後棘 사이에 1-3개의 小棘이 존재하고 뒷지느러미의 제1 가시가 곧으며, 상하악의 치수가 많고 복부의 황금색 腺組織이 50-57개이며 부레의 수지상측지 수는 19-23쌍인데 반해 C. niveatus는 계관상 돌기의 前後棘 사이에 小棘이 없고 뒷지느러미의 제1가시가 낚시처럼 구부러져 있으며 上下顎의 齒數가 적고 복부 중앙의 황금색의 선조직이 32-44개이며 부레의 수지상측지 수는 13-16쌍이다. Taxonomic revision of genus Collichthys in the south-western coastal sea of Korea were carried out and their interspecific morphological characteristics also were rechecked. The genus Collichthys has classified into three species today: C. lucidus, C. fragilis and C. niveatus. But C. lucidus and C. fragilis in them were ascertained as same species by the comparison of descriptions of many literatures and of the measurements of present specimen. As a results, genus Collichthys from Korea was classified into two species, C lucidus and C. niveatus. In the interspecific taxonomic characters, the outstanding morphological differences between C. lucidus and C.niveatus were well distinguished in following several characters: C. lucidus was made well developed occipital crest, with to 1 to 3 spinules erect, the straighted 1st anal spine, 50-57 light organs in the midventral line and 19-23 pairs of the branches of swimbladder but C. niveatus, without spinules on the occipital crest, the curved 1st anal spine, 32-44 light organs and 13-16 pairs of the branches of swimbladder.

객체지향 데이타베이스 시스템에서 트랜잭션 처리를 위한 동시성 제어기법설계

李淵植,裵錫燦,申定薰 群山大學校基礎科學硏究所 1993 基礎科學硏究 Vol.8 No.-

When some transactions are concurrently executed, the DBMS should be controlled not to induce such a problem that currently executing applications may interfere other transactions. When the generally used conventional locking mechanism in DBMS is applied to composite objects, a class or an instance of a class comes to be treated as a lockable unit. As a results, a number of locks happen to increase and the concurrency level of the system can be deteriorated. In this paper, we proposed the mechanism of locking in Object-Oriented DataBase Systems to enhance their concurrency. According to the proposed locking mechanism, when a transaction tries to access some composite objects, the DBMS checks whether the accessed composite objects and the lock of the transaction are compatible by taking advantage of the relevant components information of the composite objects. If they are compatible, the DBMS locks the target composite objects, and allows the transaction to access and operate on the target composite objects.