무인 헬리콥터의 자동비행 운용모드에 관한 연구

김정성,이길호,조성범,장세아,최기영 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.4

본 논문에서는 무인 헬리콥터의 특성을 반영한 자동비행 운용모드를 제시하였다. 무인 헬리콥터 연구에서 사용되는 비행 모드의 분석을 통해 종/횡 축의 속도 제어, 고도 제어, 방위각 제어를 포함하는 자동비행 기본구성요소를 정의하였다. 정의된 요소들을 이용하여 제자리비행모드, 전진비행모드와 경로점 비행모드로 정의되는 기본적인 자동비행 운용모드를 구성하였다. 자동비행 기본구성요소와 기본적인 자동비행 운용모드를 이용하여 선회비행모드와 경로점 비행모드의 발전된 자동비행 운용모드를 제시하였다. In this paper, we propose auto flight control modes for unmanned helicopter. We defined basic auto flight control components such as lateral, longitudinal velocity control, altitude control and heading control using auto flight control mode analysis of unmanned helicopter. Based on above-mentioned components we defined basic auto flight control mode as hovering, forward flight, waypoint navigation flight. Finally, we suggested advanced auto flight control mode of loitering mode, waypoint flight using basic auto flight control component and basic auto flight control mode.

Polyamine류와 Imidazole 유도체가 배위된 Cu(II)착물의 저해효과에 관한 ZINDO/1 연구

김정성,최진태,김창만,송영대 大邱大學校附設 基礎科學硏究所 1998 基礎科學硏究 Vol.15 No.2

The investigation of the inhibitory activity on some Cu(II) complexes with polyamines and imidazole derivatives is performed by ZINDO/1 calculations. It was found that good correlation between enthalpy of formation of the Cu(ll) complexes and experimental inhibitory activity(IA) and the weaker bond strength of between central metal and ligand appears, the higher IA becomes. These results showed that the Cu(II) complexes have weak bond strength with the exception of the following very stable compounds: square planar [Cu(N-Proplm)₂(NCS)₂](N-Proplm=N-propylimidazole), distorted octahedral [Cu(bipy)₂(NCS)₂](bipy=2,2'-bipyridine), and five coordinate [Cu(Me6tren)(NCS)]^(+)(Me_(6)tren=tri(2-dimethylaminoethyl)amine). The degree of bond strength of Cu(II) complexes will be related to the IoglA value experimental inhibitory activity coefficient(IA).

금속 3D 프린팅을 이용한 인공고관절 표면 코팅 연구

김정성,김용식,신태진,유의식 한국표면공학회 2016 한국표면공학회 학술발표회 초록집 Vol.2016 No.5

Oxovanadium(Ⅳ)錯物에 對한 速度論的 硏究

김정성 대구대학교 산업기술연구소 1984 産業技術硏究 Vol.3 No.-

The Kinetics of various reactions for Oxovanadium VO^(2+)(Ⅳ)-complexes, exchange, substitution and formation reaction has been studied. Using spectrophotometric and stopped-flow measurement, both the entering ligand and VO^(2+)(Ⅳ) complexes were found to be the first order in every case. The results obtained from the study were: in case the rate constants was Kobs=1.82×10³s^(-1) (pH=6.7, at 25℃), the activation parameters were ΔH^(≠)=10.21Kcal/mole and ΔS^(≠)=-8.79eu and in case the rate constants were Kobs=4.31×10³ s^(-1)(pH=1.57, at 25℃) the activation parament ers were ΔH^(≠)=12.7Kcal/mole and ΔS^(≠)=-4.1 eu for formation. Ligand-substitution reaction on oxovanadium(Ⅳ) complexes are essentially associative. Furthermore, the charge of the entering ligands-Hmal and Ox^(2-) -is of particular importance in determining the ligand-exchange reactions with VO(Ox)^(2-)₂ and the rate of complex formation for VO^(2+) (aq) to form VO(Ox)^(2-)₂.

Kinetics of Ligand Substitution Reactions in Vanadium(III) Complexes with Multidentate Ligand

김정성,HIROSHI TOMIYASU 大邱大學校附設 基礎科學硏究所 1993 基礎科學硏究 Vol.10 No.-

The kinetics of ligand substitution reactions in V(Gly)3 (Gly = Glycine) with various multidentate ligands, nitrilotriacetate (NTA) and ethylendiaminetetraacetate (EOM) have been atudied spectre photometrically. The rates of EDTA and NTA substitutions depend on the entering species. The value of the second order rate constants are k11= 3.0 x 10-2 M-1 s-1(1 M = 1 mol dm 3) for H2edta, k21 = 0.24 M-1 s'1 for Hnta and 1.9 x 10-2 M-1 s-1 for H2nta as an entering ligand, respectively at 250C. Large negative values of activation entropies are interpreted by associative mechanism.

Polyamine류와 Imidazole 유도체가 배위된 Ni(Ⅱ) 착물의 저해 효과에 관한 분자궤도함수론적 해석

김정성,송영대,Kim, Jung-Sung,Song, Young-Dae 대한화학회 2004 대한화학회지 Vol.48 No.2

폴리아민과 이미다졸 유도체에 대해서 AM1, PM3, ZINDO/1법으로 형성엔탈피(${\Delta}H_f$), HOMO, LUMO에너지 및 쌍극자힘(${\mu}_D$) 값을 얻었다. 이들 리간드를 Ni(II)에 배위시킨 Ni(II)착물의 저해활성효과를 ZINDO/1(Zerner''s Intermediate Neglect of Differential Overlap No.1)법으로 조사하였다. Ni(II)착물의 중심금속의 알짜전하 값이 0.03 이상과 형성엔탈피가 음의 값으로 300 eV이상에서 실험적인 저해활성 값이 나타남을 보였다. 그 결과 Ni(II)착물은 불안정한 5배위 사각피라미드형인 [Ni(dpt)(tn)]$^{2+}$(dpt=3,3''-diaminodipropylamine)(tn=1,3-diaminopropane)와 일그러진 사면체인 [Ni(N-PropIm)$_2$(NCS))$_2$](N-PropIm=N-Propylimidazole)를 제외한 착물에서는 저해활성 값이 나타남을 알 수 있었다. Quantum chemical quantities, enthalpy of formation(${\Delta}H_f$), HOMO and LUMO energy, and dipole moment(${\mu}_D$) were acquired by AM1, PM3, and ZINDO/1 methods for polyamines and imidazole derivatives. The investigation of the inhibitory activity on some Ni(II) complexes with polyamines and imidazole derivatives is performed by ZINDO/1 calculations. It was found that experimental inhibitory activity(IA) appeared when the value of net charge and enthalpy of formation were over 0.03 and -300 eV, respectively for Ni(II) complexes. These results showed that the Ni(II) complexes have exception on the following very unstable compounds: square pyramidal [Ni(dpt)(tn)])]$^{2+}$(dpt=3,3'-diaminodipropylamine)(tn=1,3-diaminopropane) and distorted tetrahedral [Ni(N-PropIm))$_2$(NCS))$_2$](N-PropIm=N-Propylimidazole).

트리아릴포스포늄 염과 카르보닐 화합물 사이의 위티그 반응의 입체선택성에 대한 고압 효과

김정성,최정훈,지진영,김창만,김용훈 대구대학교 기초과학연구소 1999 基礎科學硏究 Vol.15 No.3

The Wittig reactions of triarylphosphonium ylides with various carbonyl compounds under high pressure were carried out to investigate its effect on the cis-trans stereochemical outcome. Generally, the cis-stereoselectivities at atmospheric pressure are known to be resulted from smaller steric hindrance of α-carbon of carbonyl group with hydrogens of phenyl residue of triphenylphosphonium ylide and in oxaphosphetane intermediate stage. Thus, the steric interactions between triphenylphosphonium ylide and carbonyl compounds in the transition state can be maximized. And, the reactions of semistabilized ylide and stabilized ylide at atmospheric pressure generate mainly thermodynamically more stable trans-alkane after formation of betaine intermediate. The reactions at high pressure, however, can generate cis-alkene more exclusively through oxaphosphentane intermediate,directly without the formation of betaine intermediate by reducing distance between ylide and carbonyl compound. Reaction between benzyl triphenylphosphonium ylide, a semistabilized ylide, and butyraldehyde at atmospheric pressure gave cis-1-phenyl-1-pentene with 34/66 of Z/E stereoselectivity, but when pressurized at 10000 bar, cis-alkene with 69/31 the Z/E ratio was excellently yielded than trans-alkene. In the case of Wittig reaction of ethoxyacetyl triphenylphosphonium ylide, a stabilized ylide, with butyraldehyde, Z/E stereoselectivity at 10000 bar was inversed in contrast to atmospheric pressure.

우울증 조사표에 의한 養老院老人에 對한 調査

김정성 대한신경정신의학회 1974 신경정신의학 Vol.13 No.4

There has been many studies on the mental health problems in the aged especially on the depression but still there is no active study on the mental health problems in the aged in Korea. So, the author applied a depression scale, which was designed by Oh et al, to 100 peoples in two nursing homes for the aged in Busan area. Analysis of this data revealed that this sample showed statically significant higher depression scores than the normal controls (16.53±:6.17). Futher more it was identified that 36% of the sample showed higher than 18 scores. Reading this data, the author concluded that the results were correlated with clinical picture of depression in these samples. Since this study was limited to the aged in the nursing home, it is hard to apply this data to the aged in general. The increasing need for mental health problems in the aged are emphasized.

酸素(17O) 同位元素 核磁氣共鳴 Spectra를 이용한 Uranyl Ion 關한 硏究

김정성,정우식 대구대학교 기초과학연구소 1985 基礎科學硏究 Vol.2 No.-

국화속 구절초무리와 근연종인 산국 및 감국 에서 보이는 잎의 해부학적 특징

김정성,Hiroshi Tobe 한국식물분류학회 2009 식물 분류학회지 Vol.39 No.1

The Chrysanthemum zawadskii complex is demarcated from other species by having the white and pink ligulate flowers. Its morphological characters are greatly diversified, so that various classification systems have been suggested. The character of leaf thickness has been mentioned as the characteristic for recognizing some of infra-specific taxa within this complex. In this study, we used longitudinal leaf sections to investigate the leaf thickness and cell number of leaf blades of 13 populations including those of the members of the C. zawadskii complex, as well as 4 populations of the related species of C. boreale and C. indicum. From the result, it was clear that the leaves were thicker in populations of C. boreale, C. indicum and C. zawadskii complex (diminishing in that order), and that the leaves were composed of about 9 cell layers in all populations. Within the C. zawadskii complex, leaf shape and thickness varied among the populations. It was very interesting that the taxa with restricted distribution, like C. zawadskii var. tenuisectum, C. zawadskii var. alpinum, C. zawadskii var. lucidum, and C. zawadskii subsp. coreanum had a thicker leaves than found among widely occurring taxa. From this, leaf thickness is supposed to be an adaptation to the unique habitat of each population. 구절초 무리는 국내에 분포하는 국화속 중 흰색 또는 분홍색의 설상화를 가지는 특징으로 인해 다른 두 종과 구별되는데 외부형태학적 변이로 인하여 다양한 분류학적 견해가 제안되어 온 분류군이다. 본 연구에서는 지금까지 국화속의 종 및 종내 분류군을 인식하기 위해 이용되어 온 형태학적 형질 중 구절초 무리내의 종내 분류군을 인식하기 위한 특징의 일부로서 사용된 바 있는 잎의 두께에 주목하여 구절초 무리에 속하는 13개 집단과 근연종인 산국 및 감국의 4개 집단을 이용하여 잎의 구조적 특징을 확인하였다. 이를 위해 잎의 횡단절편을 제작하여 엽신의 두께와 세포층 수, 세포의 크기를 비교하였다. 잎의 두께를 확인해본 결과 산국, 감국, 구절초 무리 순으로 두꺼운 것으로 나타났으며 세 종 모두 9개 전후의 세포층으로 구성되어 있어 잎의 두께는 세포층 수가 아니라 세포 크기에 따라 달라지는 것으로 밝혀졌다. 구절초 무리 내에서는 집단 간에 잎의 형태 및 두께에서 다양한 변이를 보였는데 가는잎구절초, 바위구절초, 울릉구절초, 한라구절초 등 특히 제한적인 분포를 보이는 분류군들이 전국적인 분포를 보이는 분류군에 비해 상대적으로 두꺼운 잎을 가지는 것이 확인되었고, 이는 각 분류군이 고유의 서식환경에 적응한 결과로 생각된다.