성대 (成大) 자연과학캠퍼스의 환경오염에 관한 연구

박윤창,홍사욱,송영신 ( Yoon Chang Park,Sa Uk Hong,Young Shin Song ) 한국하천호수학회 1984 생태와 환경 Vol.17 No.3·4

A research for the environmental protection in the natural science campus of Sung Kyun Kwan University which is located at Chun-Chun Dong in Suweon city had been proceeded from June 1982 to September 1983. The actual conditions of the water quality of I1-wol reservoir in front of natural science campus and several places in and nearby the campus were surveyed. Judging from this survey, it was found that the water quality of I1-wol reservoir was suitable for agricultural use without any trouble. However, seasonal fluctuation in the concentration of anions and cations in water was found. Even though the concentration of some cations such as chloride and sulfate did not reach the level of WHO for water or allowable limit of our national water works it shows much higher value than that in all of natural rivers and clean lakes in our country. On the other hand, the number of E. coli in the water of I1-wol reservoir was seasonally fluctuated, that is, a large number was counted in summer and a small number in winter. The average number of E. coli in this water was less than 3,000 per ml all the year round. Therefore, it is regarded as a suitable water for irrigation. The waste water was treated with FeSO₄ or Fe₂(SO₄)₃ㆍ xH₂O in order to eliminate heavy metals such as Hg and Cd dissolved in it. After the ratio of Fe^++ to OH^- in the water was adjusted to 1 : 1.5 by NaOH and then aeration was followed most Cd and Hg ions were eliminated by precipitation. 14 organic substances were detected from the water in the waste water reservoir tank and some of them were easily removed by aeration.

廢水中 Formaldehyde의 除去에 관한 硏究

朴允昌,박종운 성균관대학교 기초과학연구소 1986 論文集 Vol.37 No.1

A removing process of formaldehyde in a HCHO-containing wastewater by H_2O_2 have been studied by using various catalyzers such as Ca^2+, Mg^2+, and Fe^2+. A pH 5.4 wastewater containing 1,000ppm HCHO was treated with 5% NaOH solution to pH 10 and then H_2O_2 and FeSO_4 which is frequently used to eliminate heavy metals such as Cd, Hg and Pb in wastewater were added. After heating at 70℃ for 30 minutes, the wastewater solution was analyzed by chromotropic acid method to determine the residual HCHO. HCHO in the wastewater was found to be almost completely removed. The most appropriate concentration of FeSO_4 in this removing process was 0.02%. Since H_2O_2 can be used as an oxidant in the elimination of heavy metal ions in wastewater, H_2O_2 and FeSO_4 can be effectively used to remove formaldehyde and heavy metal ions in wastewater simultaneously.

무기 이소시안화 및 티오시안화 전이금속 화합물의 구조에 관한 연구

박윤창,지광용,이미녕,이영희 성균관대학교 기초과학연구소 1989 論文集 Vol.40 No.1

IR, UV 그리고 EPR 분석을 통해 〔R_4N〕_2 〔M(NCX)_4〕 (이 때, R=CH_3^+, C_2H_5^+; M=Cd Cu, Zn, X=O, S) 화합물의 착이온에서 중심 금속이 N과 결합하고 있는지 아니면 O, S와 결합하고 있는지를 연구했다. 위의 모든 화합물은 금속이 N과 결합된 것으로 규명되었다. Cd(Ⅱ)과 Cu(Ⅱ) 화합물은 일그러진 정사면체 구조에 의해 C-N, C-S 신축진동수의 분리를 보였다. IR 스펙트럼에서 〔(C_2H_5)_4N〕_2 〔Cu(NCS)_4〕는 단일선의 C-N 신축진동수를 보인 반면, 〔(CH_3)_4N〕_2 〔Cu(NCS)_4〕는 일그러진 정사면체 구조에 기인한 이중선을 보였다. 〔(C_2H_5)_4N〕_2 〔(Cu(NCS)_4〕는 d-d 전이로 판단되는 넓은 전자흡수띠가 438nm 근처에서 관찰된 반면, 〔(CH_3)_4N〕_2 〔Cu(NCS)_4〕는 d-d전이에 의한 흡수띠가 관찰되지 않았다. 5% Cu(Ⅱ)이 혼입된 〔(C_2H_5)_4N〕_2 〔Cd(NCS)_4〕의 EPR 스펙트럼은 비등방성 구조를 지녔으나, 〔(CH_3)_4N〕_2 〔Cd(NCS)_4〕는 비등방성 뿐만 아니라 정규적인 정사면체 구조의 증거인 등방성을 상온에까지 지녔다. IR, UV and EPR spectra of the compounds whose formulas are 〔R_4N〕_2 〔M(NCX)_4〕, where R=CH_3^+, C_2H_5^+ and M=Cd, Cu, Zn;X=O, S have been studied in order to investigate whether the isocyanato, thiocyanato group is bonded to the central metal through the nitrogen atop or through the sulfur, oxygen atom in those complex ions. All above complexes showed that the metal is linked through the nitrogen atom. It was turned out to be that. the splitting in C-N and C-S stretching frequencies of Cd(Ⅱ) and Cu(Ⅱ) compounds is due to the distorted tetrahedral structure of those compounds. While IR spectrum of 〔(C_2H_5)_4N〕_2 〔Cu(NCS)_4〕 showed singlet C-N stretching frequency, 〔(CH_3)_4N〕_2 〔Cu(NCS)_4〕 showed doublet which indicates that the compound has a distorted tetrahedral structure. 〔(C_2H_5)_4N〕_2 〔Cu(NCS)_4〕 was observed to have a broad electronic absorption band near 438 nm which originates from d-d transition. On the other hand, 〔(CH_3)_4N〕_2 〔Cu(NCS)_4〕 did not show an absorption band due to d-d transition. EPR. spectrum of Cu(Ⅱ) doped 〔(C_2H_5)_4N〕_2 〔Cd(NCS)_4〕 showed anisotropic structure and 〔(CH_3)_4N〕_2 〔Cd(NCS)_4〕 showed both anisotropic and isotropic structure even at room temperature which is an evidence of regular tetrahedral structure.

영사식 3차원 형상 측정을 위한 격자무늬 생성장치에 관한 연구

박윤창,박경근 선문대학교 1998 공과대학논문집 Vol.1 No.1

Noncontact measuring methodology of 3-dimensional profile using CCD camera are very attractive because of it's high measuring speed and its's high sensitivity. Especially, when projecting a grid pattern over the object the captured image have 3 dimensional information of the object. Projection moire extract 3-D information with another grid pattern in front of CCD camera. However phase measuring profilometry(PMP) obtain similar results without additional grid pattern. In this paper, new method for grid pattern generation system by polygonal mirror and Laser Diode. This system is applied the projection moire and the PMP.

Cu (tetramethylenesulfoxide)_6 (ClO_4)_2에서 금속과 리간드의 상호작용

朴允昌 成均館大學校 1981 論文集 Vol.30 No.-

The diluted powder electron spin resonance spectra of the hexacoordinated complex of copper (Ⅱ) with tetramethylenesulfoxide (TMSO) exhibit Jahn-Teller distortions. The g values of this complex are consistent with tetragonally elongated environment for the Cu^(2+) ion. Admixture of d3z^2-r^2 into dx^2-y^2 was found to be about 5%, The transition temperature of the copper (Ⅱ) doped Zn(TMSO)_6 (CIO_4)_2 was much higher than the reported transition temperature of a hexahydrated copper (Ⅱ) complex, CuSiF_6·6H_2O. The low temperature spin Hamiltonian parameters of this complex were used for the calculation of bonding parameters.

γ-ray로 照射된 2,4-dichloropentane

朴允昌,盧在蘭 成均館大學校 1981 論文集 Vol.29 No.-

2, 4-dichloropentane irradiated in a Cobalt-60 source has been studied by gas chromatograph, IR-spectrometer, UV-visible spectrometer and nuclear magnetic resonance. More than four new substances were detected when 2, 4-dichloropentane was irradiated to 20Mrad. Free radicals produced were unstable at room temperature resulting in the formation of 1, 3-pentadiene, a conjugated compound, of which quantity increased as the dose rate increased. The absorption peak of 2, 4-dichloropentane occuring at 240㎜ seems to indicate that 2, 4-dichloropentane is partially hydrogen-bonded.

단일격자 이송을 이용한 영사식 3차원 물체 형상 측정에 관한 연구

박윤창,정경민 한국공작기계학회 1999 한국공작기계학회 춘계학술대회논문집 Vol.1999 No.-

Noncontact measuring methodology of 3-dimensional profile using CCD camera are very attractive because of it's high measuring speed and its's high sensitivity. Especially when projecting a grid pattern over the object, the captured image have 3 dimensional information of the object. Projection moire extract 3-D information with another grid pattern in front of CCD camera. However phase measuring profilometry(PMP) obtain similar results without additional grid pattern. In this paper, the projection moire are compared with the PMP mathematically, and it is shown that PIMP can generate moire image with simple mathematical computations. Experimental works are also carried out showing the same results. It is shown that using a single gird pattern, moire image can be obtained directly without any mathematical operation when some conditions are satisfied.

3차원 인체측정기 IBS-2000에 관한 연구

박윤창,조기헌 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

In this paper we write to the result of measuring human body shape method - ibs-2000 - for human body shape measurement. The size measurement units and measuring speed is very inportant to efficiency of human body shape measurement units. By polygonal mirror system, the size measurement units and measuring time can be retrench.

Ultra High-speed 3-dimensional Profilometry Using a Laser Grating Projection System

박윤창,안성준,강문호,권영철,안승준 한국광학회 2009 Current Optics and Photonics Vol.13 No.4

The grating projection method with phase-shifting technique is very useful in measuring the 3-dimensional (3D) shape with high accuracy and speed. In this work, we have developed an ultra high-speed digital laser grating projection system using a high-power laser diode and a highsensitivity CMOS camera. With our system, the optical measurement required to find out the profile of a 3D object could be carried out within 2.6 ms, which is a significant (~10 times) improvement compared with those of the previous studies.

단파장 위상천이를 이용한 미세형상 측정Ⅰ

박윤창,김호열 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

The development of Shadow Moire in many kinds of methods for acquiring 3-dimensional information from an object is written in this paper. The fringe is appeared, when a grating mask makes its shadow on the object. The object is moved along x-axis more then 3 times to get phases from its fringe that contains data of the object's height. PMP(Phase Measuring Profilometry) is used for analyzing these images from a CCD camera. The calculated phase is remedied for expending the restricted results due to range of the tan^(-1).