전엽처리(剪葉處理)가 수도(水稻)의 수량구성요소(收量構成要素)에 미치는 영향(影響)

박종성,이인섭,Park, Jong-Seong,Lee, In-Seop 충남대학교 농업과학연구소 1977 Korean Journal of Agricultural Science Vol.4 No.1

본시험(本試驗)은 유신(維新)과 밀양(密陽)15호(號) 2품종(品種)서 출수후(出穗後) 전엽(剪葉)의 정도(程度)와 정리부위(庭理部位)를 달리했을 때 전엽(剪葉)이 천립중(千粒重), 등숙율(登熟率) 및 수중(穗重)에 미치는 영향(影響)을 알아보고자 용양시험(用陽試驗)을 하였던 바 그 결과(結果)는 다음과 같았다. 전엽처리(剪葉處理)에 따른 천립중(千粒重), 등숙율(登熟率) 및 수중(穗重)은 모두 현저(顯著)히 저하(低下)되었으며 처리간(處理間)에는 고도(高度)의 유의차(有意差)(밀양(密陽)15호(號)의 천립중(千粒重)은 예외(例外))를 보였다. 엽위별(葉位別) 존치엽수(存置葉數)와 그 조합(組合)에 따른 천립중(千粒重), 등숙율(登熟率) 및 수중(穗重)은 엽신(葉身) 1매(枚)를 존치(存置)하였을 때에는 $L_1>L_2>L_3>L_4$순(順)으로 그 영향(影響)의 크기를 보였고, 엽신(葉身) 2매(枚)를 존치(存置)하였을 때에는 상위엽(上位葉)이 조합(組合)된 것이 높았다. 유신(維新)은 처리(處理)가 상대적(相對的)으로 늦었음에도 불구하고 천립중(千粒重)을 제외(除外)하고는 등숙율(登熟率)과 수중(穗重)에서 모두 전엽처(剪葉處)리에 대(對)한 반응(反應)이 밀양(密陽)15호(號)보다 민감(敏感)한 것으로 보아 생육말기(生育末期)에까지 천립중(千粒重), 등숙율(登熟率) 및 수중(穗重)의 증가(增加)에 미치는 엽(葉)의 영향(影響)이 지대(至大)한 것으로 판단(判斷)된다. This experiment was conducted to estimate the effect of defoliation on the weight of 1,000 kernels, the rate of ripened grains and the weight of an ear of Yusin and Mylang No. 15 after heading. The resnlts obtained were as follows : 1. The weight of 1,000 kenels, the rate of ripend grains and the weight of an ear were significantly decreased by various defoliation. But there was not found significant difference in 1,000 kernel weight of Mylang No. 15 between each treatment of defoliation. 2. When lower leaves were remained, the weight of 1,000 kernels, the rate of ripened grains and the weight of an ear were more influence than when higher leaves were remained. And the same results were obtained when two leaves were remained at the different leaf position. In order words, when leaf remained was combined with leaf positioned at upper area, the weight of 1,000 kernels, the rate of ripened grains and the weight of an ear were higher than when the leaf was combined with lower leaves. 3. Even though Yusin was early heading variety and subjected to defoliation later than Mylang No. 15 in terms of total physiological maturity the response to defoliation was higher than that of Mylang No. 15 in the rate of ripened grains and ear weight. The exception was found for the 1,000 kernel weight. The result obtained indicated that leaves of Yusin influence more the weight of 1,000 kernels, the rate of ripened grains and the weight of an ear to the later stage than that of Mylang No. 15.

분사주조한 입자강화 알루미늄 복합재료의 미세조직 특성

박종성,이인우,김명호 ( Chong Sung Park,In Woo Lee,Myung Ho Kim ) 한국주조공학회 1994 한국주조공학회지 Vol.14 No.6

N/A Aluminium-silicon alloy(JIS AC8A) matrix composites reinforced with SiC particles were fabricated by spray-cast forming process, and the microstructure of powders and preforms produced were studied by using an optical and scanning electron microscopy. SiC particles were co-sprayed by mixed phase injection method during the spray casting process. Most of the composite powders formed by this mixed phase injection method exhibit morphology of particle-embedded type, and some exhibits the morphology of particle attached type due to additional attachment of the SiC particles on the surface of the powders in flight. The preforms deposited were resulted in dispersed type microstructure. The pre-solidified droplets and the deposited preform of SiC-reinforced aluminium alloy exhibit finer equiaxed grain size than that of unreinforced aluminium alloy. Eutectic silicons of granular type are crystallized at the corner of the aluminum grains in the preforms deposited, and some SiC particles seem to act as nucleation sites for primary/eutectic silicon during solidification. Such primary/eutectic silicons seem to retard grain growth during the continued spray casting process. It is envisaged from the microstructural observations for the deposited preform that the resultant distribution of SiC injected particles in the Al-Si microsturcture is affected by the amount of liquid phase in the top part of the preform and by the solidification rate of the preform deposited.

Effects of nitrgen source and rate on the growth of the sesame-wilt fungus, Fusarium oxysporum f. vasinfectum (Atk). Snyder et Hansen

박종성,Park Jong Seong Korean Society of Applied Entomology 1963 한국식물보호학회지 Vol.2 No.-

우리나라에서 참깨나 목화에 기생하여 위조병을 일으키는데 Fusarium oxsporum f. vasinfectum의 생육에 미치는 질소원의 종류 및 농도의 영향을 구명하고자 본연구에 착수하였다. 본연구의 결과로부터 질소원의 종류 및 농도의 차이가 Fusarium oxysporum f. vasinfectum의 생육에 큰 영향을 미친다는 것을 알았다. 공시한 4종의 질소원 중에서 Nitrate N나 Urea N가 Ammonia N 또는 Ammonium and Nitrate N 보다 공시균의 생육에 대하여 더욱 알맞는 질소원이었다. 그 중에서도 Nirtrate N는 타른 N원보다 훨씬 넓은 농도범위에서 본균에 의하여 이용되므로 가장 알맞는 질소원이라고 할 수 있다. 한편 Ammonia N는 공시균의 균계생장이나 포자형성의 현저한 감소와 더불어 기형적인 파형균총 또는 염주상균계세포를 농도에 관계없이 형성하므로 질소원으로서의 이용가치가 거의 없다. Ammonia N가 공시균의 생육에 미치는 영향은 파형균총 또는 염주상균계형성으로 보아 Phenoxy 화합물이 타른 진균의 생육에 미치는 영향과 흡사하다. Ammonium and Nitrate N도 50meg. 이상의 농도에서 공시균의 균계생장 또는 포자형성을 감소시키는 한편 파형균총과 같은 이상생육이 다소간음폐되기는 하나 적제 Ammonia N에서 유래하는 파형균총을 유기하므로 알맞는 질소원이라고 생각할 수 없다. 따라서 Ammonia N 단독 또는 타질소원과 Ammonia N의 결합태는 Fusarium oxysporum f. vasifectum의 생육을 위한 질소원으로서는 부적당하다. The present study was undertaken to investigate the effects of different nitrogen source and rate on the growth of Fusarium oxysporum f. vasinfectum which is known to be a noticeable fungus causing the wilt disease of both sesame and cotton in Korea. From the results of this study, It was known that different N source and rate markedly affect the growth of Fusarium oxyspsrum f. vasinfectum Among four N sourses were used in this study, nitrate-N and urea-N were appropriate N source for the growth of fungus. Above all, nitrate N was the best N source because it is utilized in more extensive range of concentration in comparison with the other N source by the fungus, On the other hand, ammonia-N is of little avail for the growth of the fungus because of the formation of unusual colonies with wavy margin and bead-like mycelial cells in addition to marked reduction of mycelial growth and B sporulation of the fungus irrespective of concentration. Judging from the formation of such an abnormal colony and bead-like mycelial cell which is known to be a characteristic of 'staling-type' growth of fungi, the effect of ammonia-N on the growth of Fusarium oxysporum f. vasinfectum is similar to that of phenoxy componnds on some other fungi previously investigated by some workers. Ammonium and nitrate also was not considered to be an appropriate source for the growth of the fungus because of the formation of colonies with slight wavy margin and appreciable reduction of mycelial growth and sporulation in higher concentration than 50meq. , although much or less masking of the irregularity of colony occurs. Therefore, ammonia N alone or any other N combined with ammonia N is of little avail for the growth of Fusarium oxysporum f. vasinfectum.

금강수질(錦江水質)에 관(關)한 조사연구(調査硏究)

박종성,오만진,Park, Jong-Seong,Oh, Man Jin 충남대학교 농업과학연구소 1979 Korean Journal of Agricultural Science Vol.6 No.1

금강수계(錦江水系)의 신탄진(新灘津)등 6개지점(個地點)을 조사지역(調査地域)으로 설정(設定)하고 1977년(年) 9월(月)부터 1978년(年) 8월(月)까지의 수질(水質)을 분석(分析)한 결과(結果)는 다음과 같다. 1) pH, $NO_3-N$, $NO_2-N$는 조사지점별(調査地點別), 월별(月別)차이가 없었다. 2) 부여(扶餘), 강경지점(江景地點)의 BOD는 각각 3.9~5.6, 5.6~6.0ppm으로 상수도원(上水道源) 오염한계(汚染限界)에 도달(到達)하였다. 3) 대전천(大田川)이 합류(合流)하는 매포지점(梅浦地點)의 BOD는 신탄진지점(新灘津地點)의 BOD에 비(比)하여 1977년(年) 9월(月), 10월(月), 11월(月)에 각각 1.9, 3, 2.1배(培) 증가되었다. 4) 용존산소(溶存酸素)는 $7.6{\pm}3.8ppm$으로 수온(水溫)의 변화(變化)와 지점별(地點別) 차이가 있었다. 5) 경도(硬度), 부유물질(浮游物質), $NH_3-N$는 조사지점별(調査地點別), 월별(月別)로 차이가 있었다. Water of river gets great concern about its quality, which might be polluted with pollutant from various industrial plants booming along the river sides in recent years. As a first step to prevent any applciable damage due to water pollution, survey on the water quality of Keum river at Sintanjin, Maepo, Taepyongri, Kongju, Puyeo and Kanggeng, six regions was conducted during september, 1977 through august, 1978 and the results were summarized as follow: 1. There were no significant regional and monthly difference in pH, $NO_2-N$, and $NO_3-N$ of water. 2. The BOD at Puyeo, Kanggeng was 3.9 to 5.6, 5.6 to 6.0 ppm, respectively, and those values reached the limiting level for tap water sources. 3. The BOD at Maepo, where Daejeon streams meet, was found 1.9, 3.0, and 2.1 times higher than those at Sintanjin region, during september, october and november, respectvely. 4. Content of DO was $7.6{\pm}3.8ppm$ in all surveyed regions and varied with water temperature and regional difference. 5. There were found regional difference and monthly difference in water hardness, suspended solid and $NH_3-N$.

자격제도 관리.운영에 있어서 국가와 민간의 역할에 관한 연구

박종성,김현수,Park Jong-Sung,Kim Hyun-Soo 한국공학교육학회 2004 공학교육연구 Vol.7 No.2

이 연구는 국가기술자격제도 관리 운영체제에 대한 국가와 민간의 적절한 역할분담 체계가 무엇인지를 알아보고 이를 구축하기 위한 방안을 마련하고자 하는 데 목적이 있다. 이 연구의 목적을 달성하기 위해 국가기술자격제도 관리의 국가와 민간의 역할분담에 대한 방향을 탐색하였다. 또한 국가기술자격제도의 관리 운영 현황을 분석하여 국가중심의 자격제도 운영의 한계를 살펴보았으며, 자격제도 관리 운영에 대한 국가 및 민간의 역할 분담 방안을 제시하였다. 연구방법으로 관련자료의 수집 및 분석, 기업체(사내자격관리자), 업종별 협회(사업주 단체)를 대상으로 한 설문조사, 국가와 민간의 역할 분담 방향을 설정하기 위한 전문가 협의회 개최, 기업체 및 업종별 협회에 대한 의견수렴을 위한 면담조사 등이 실시되었으며, 자격제도 전문가를 중심으로 연구 협력진 구성하여 운영하였다. The study aims to explore whether the management and operation of national technique qualification system has a suitable role division between the government and non-government and to design plans for building it. To do so, a direction for role division between the government and non-government was investigated in the management, national technique qualification system. In addition, limitations in the operation of government-centered qualification system were pointed out by analyzing the present status on the management and operation of national technique qualification system and plans for role division between the government and non-government were proposed in the management and operation of qualification system. Various methods were applied to this study as its methodology: the collection and analysis of the relevant literatures, surveys targeting companies(internal qualification managers) and associations by industrial classification(owners' groups) as respondents, holding expert consultations for setting a direction in dividing roles between the government and non-government, interviews with companies and associations by industrial classification for gathering their opinions, forming and operating a collaborative research group consisting of specialists in qualification system.

백합(百合) 잎마름병균(病菌)의 균사생장(菌絲生長), 포자형성(胞子形成) 및 균핵형성(菌核形成)에 미치는 몇가지 환경요인(環境要因)의 영향(影響)

박종성,김홍기,Park, Jong Seong,Kim, Hong Gi 충남대학교 농업과학연구소 1988 Korean Journal of Agricultural Science Vol.15 No.1

백합(百合) 잎마름병균(病菌)(Botrytis elliptica)의 균사생장(菌絲生長), 포자형성(胞子形成) 및 균핵형성(菌核形成)에 미치는 주요(主要)한 환경요인(環境要因)의 영향(影響)을 밝히고자 실험(實驗)을 실시(實施)한 결과는 다음과 같다. 1. B. elliptica는 V-8 juice agar 배지(培地)에서 균사생장(菌絲生長)이 가장 양호(良好)하였으며 NUV light 조사시(照射時) 다른 배지(培地)에 비해 분생포자(分生胞子)의 형성(形成)도 빨랐고 형성량(形成量)도 많았으며 3일간(日間) $23^{\circ}C$에 배양(培養)한 후 NUV light를 조사(照射)하면 보다 다량(多量)의 분생포자(分生胞子)를 얻을 수 있었다. 2. 균(菌)의 생장(生長) 및 포자발아적온(胞子發芽適溫)은 $23^{\circ}C$였으며 고온(高溫)보다는 $19{\sim}23^{\circ}C$의 비교적(比較的) 저온(低溫)에서 균(菌)의 생장(生長)이 빨랐다. 3. pH 4.5~5.0에서 균(菌)의 생육(生育)이 좋았으나 pH가 높아질수록 생장(生長)이 억제(抑制)되었다. 4. 광(光)은 균사(菌絲)의 생육(生育)에는 큰 영향이 없었으나 포자(胞子)의 형성(形成)에는 광(光)의 종류(種類)가 매우 크게 작용(作用)하여 NUV light 조사(照射)에 의(依)해서만 분생포자(分生胞子)가 형성(形成)되었다. 균핵(菌核)은 $19^{\circ}C$이하(以下)의 배양(培養)에서만 형성(形成)되었다. This experiment was conducted to study the effect of some environmental factors on mycerial growth, sporulation and sclerotial formation of Botrytis elliptica cultured on artificial media. Mycerial growth of B. elliptica was the most favorable on V-8 juice agar among the seven different media tested and sporulation of the fungus was favorable on the medium under NUV light irradiation. Abundant conidia could be obtained from V-8 juice agar medium by NUV light irradiation after 3 days of incubation at $23^{\circ}C$ under darkness. The optimum temperature for mycerial growth and conidial germination was $23^{\circ}C$ and the mycerial growth was favorable at relatively lower temperature ranged $19^{\circ}C$ to $23^{\circ}C$. The optimum pH of the medium for mycerial growth of this fungus ranged 4.5 to 5.0 and that was inhibited at higher pH of the media. Mycerial growth of the fungus was not highly influenced by irradiation of fluorescent light, however sporulation was stimulated under NUV light irradiation. Sclerotia of B. elliptica were formed when it was cultured at lower temperature below $19^{\circ}C$.

BaCeO₃가 첨가된 BaZrO₃의 미세구조 및 수소이온 전도도

박종성,이성명,김동완,이종호,이해원,최헌진,김병국,Park, Jong-Sung,Lee, Sung-Myung,Kim, Dong-Wan,Lee, Jong-Ho,Lee, Hae-Won,Choi, Heon-Jin,Kim, Byung-Kook 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.4

The dense sintered bodies with >95% theoretical densities were successfully obtained from the $BaZrO_3,\;BaCeO_3,\;Ba(Zr_{0.7}Ce_{0.3})O_3$ solid solution, and core-shell structured $0.7BaZrO_3-0.3BaCeO_3$ composite powders prepared by sol-gel methods. The activation energy of $Ba(Zr_{0.7}Ce_{0.3})O_3$ solid solution calculated from the Arrhenius plot of the proton conductivities was similar to that of $BaZrO_3$. The activation energy of core-shell structured $0.7BaZrO_3-0.3BaCeO_3$ composite, however, was much lower than that of $BaZrO_3$ or $Ba(Zr_{0.7}Ce_{0.3})O_3$ solid solution, and was very similar to that $BaCeO_3$. These results could be assigned to the Ce-rich grain boundary which was clearly observed by EDX in core-shell structured $0.7BaZrO_3-0.3BaCeO_3$ composite.

분사성형법에 의한 SiC 입자강화 알루미늄 복합재료의 제조 - 1. 미세조직에 대한 고찰 -

박종성,김명호,배차헌 ( Jong Sung Park,Myung Ho Kim,Cha Hurn Bae ) 한국주조공학회 1993 한국주조공학회지 Vol.13 No.4

N/A Aluminum alloy(AC8A) matrix composites reinforced with SiC particles(10% in vol.) were fabricated by Centrifugal Spray Deposition(CSD) process. The microstructures were investigated in order to evaluate both the mixing mode between aluminum matrix and SiC particles, and the effect of SiC particles on the cooling behaviours of droplets during flight and preforms deposited. A non-continuum mathematical calculation was performed to explain and to quantify the evolution of microstructures in the droplets and preforms deposited. Conclusions obtained are as follows; 1. The powders produced by CSD process showed, in general, ligament type, and more than 60% of the powders produced were about 300 to 850um in size. 2. AC8A droplets solidified during flight showed fine dendritic structure, but AC8A droplets mixed with SiC particles showed fine equiaxed grain structure, and eutectic silicon were formed to crystallize granularly between fine aluminum grains. 3. SiC particles seem to act as a nucleation sites for pro-eutectic silicon during solidification of AC8A alloy. 4. The microstructure of composite powders formed by CSD process showed particle embedded type, and resulted in dispersed type microstructure in preforms deposited. 5. The pro-eutectic silicon crystallized granularly between fine aluminum grains seem to prohibit grains from growth during spray deposition process. 6. The interfacial reactions between aluminum matrix and SiC particles were not observed from the deposit performs and the solidified droplets. 7. The continuum model seem to be useful in connecting the processing parameters with the resultant microstructures. From these results, it was concluded that the fabrication of aluminum matrix composites reinforced homogeneously with SiC particles was possible.

분사주조법에 의한 저열팽창 알루미늄합금의 제조

박종성,이정근,김명호 ( Chong Sung Park,Jeong Keun Lee,Myung Ho Kim ) 한국주조공학회 1997 한국주조공학회지 Vol.17 No.3

N/A In order to fabricate lower thermal expansion aluminium alloys, the effects of microstructural parameters such as the volume fraction of SiC_p and the shape and size of Si phase on the coefficient of thermal expansion(CTE) of the spray-cast and hot-extruded hypereutectic Al-Si(A390) alloy composites were investigated experimentally. The CTEs of hypereutectic Al-Si (A390) alloy were changed proportionally with the size of Si phase. Ultimate tensile strength, elongation and Young`s modulus of the spray-cast and hot-extruded specimen were improved dramatically compared to those of the permanent mold-cast specimen. Although Young s modulus of the spray-cast and hot-extruded specimen was improved highly effectively by addition of SiC_p, no improvement was observed for the UTS and elongation. Spray-cast and hot-extruded hypereutectic Al-Si (A390) alloy reinforced with 20vol.%SiC_p exhibits a CTE equivalent to stainless steel.

수리적 간극변화를 고려한 수리적 굴착손상영역의 정의에 관한 연구

박종성,류창하,이정인,류동우,Park, Jong-Sung,Ryu, Chang-Ha,Lee, Chung-In,Ryu, Dong-Woo 한국터널지하공간학회 2007 한국터널지하공간학회논문집 Vol.9 No.2

굴착손상영역(EDZ)은 굴착으로 인해 현지 암반이 역학적으로 손상을 입게 되어 응력상태, 변위상태, 암반의 안정성, 지하수의 흐름상태 등에 변화가 일어나는 영역을 의미한다. EDZ의 역학적 특성과 관련한 많은 연구들이 수행되었지만, EDZ에서의 지하수 유동 특성에 관한 연구는 아직 부족한 수준이다. 따라서 본 연구에서는 굴착으로 인해 굴착면 주변의 수리적 간극이 늘어나는 영역을 산정하여 '수리적 굴착손상영역'이라 정의하고 이를 위해 수리-역학적 상호작용(coupling)해석을 수행하였다. 이는 개별 불연속면 망의 생성을 통한 역학적, 수리적 변화의 모사가 가능한 개별요소법(discrete element method; DEM)을 이용하여 수행하였다. 이를 통해 EDZ에서 지하수의 흐름에 영향을 미치는 각종 조건들(불연속면의 간극, 불연속면 군의 방향, 불연속면 군의 길이, 불연속면의 각도 등)의 변화와, 응력분포, 지하수의 유동 등으로 인해 수리적 간극 값이 어떻게 변화하는지를 파악하였다. 이 결과를 토대로 수리적 간극이 커지는 영역, 수리적 EDZ를 공동 주변의 불연속면 방향에 수직 방향으로 존재하는 타원형의 형태로 모델링 하였다. The excavation damaged zone (EDZ) is an area around an excavation where in situ rock mass properties, stress condition, displacement, groundwater flow conditions have been altered due to the processes induced by the excavation. Various studies have been carried out on EDZ, but most studies have focused on the mechanical bahavior of EDZ by in situ experiment. Even though the EDZ could potentially form a high permeable pathway of groundwater flow, only a few studies were performed on the analysis of groundwater flow in EDZ. In this study, the 'hydraulic EDZ' was defined as the rock zone adjacent to the excavation where the hydraulic aperture has been changed due to the excavation by using H-M coupling analysis. Fundamental principles of distinct element method (DEM) were used in the analysis. In the same groundwater level, the behavior of hydraulic aperture near the cavern was analyzed for different stress ratios, initial apertures, fracture angles and fracture spacings by using a two-dimensional DEM program. We evaluate the excavation induced hydraulic aperture change. Using the results of the study, hydraulic EDZ was defined as an elliptical shape model perpendicular to the joint.