고추 乾燥機 開發을 위한 고추의 適正 乾燥方法에 관한 基礎 硏究

成始興,吳聖根 建國大學校 自然科學硏究所 1994 建國自然科學硏究誌 Vol.5 No.1

Drying method, the characteristics of dryer, which are currently used to dry a red pepper, were surveyed and analyzed to design and analyze an economical red dryer. Based on the results of this research the following conclusions were made: Drying by red pepper dryer was the most popular drying method(49.0%) surveyed from the farmhouse distribution according to drying method. After primary drying, secondary drying was widely performed. The larger area was cultivated the red pepper by farmer, the more dryer was used to dry it. Besides the smaller area was, the more warehouse drying was. From drying temperature according to the drying periods, the lower initial input temperature was, the lower initial temperature was. While the initial input temperature was passing to the final drying, initial temperature was inclined to be higher. The drying time and temperature were not constant. The number of mean drying day according to the drying methods were 13.8, 3.7∼5, and 1.7 for natural drying, house drying, warehouse drying, and dryer respectively. The dryer should spread far and wide in future, because red pepper drying was difficult in bad weather for drying red pepper. An economical red pepper dryer should be developed as soon as possible.

Effect of Inhomogeneous Nucleation of Hydride at α/β Phase Boundary on Microstructure Evolution of Zr–2.5 wt%Nb Pressure Tube

Sung‑Soo Kim,Sangyeob Lim,Dong‑Hyun Ahn,Gyeong‑Geun Lee,Kunok Chang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4

We analyzed the microstructural characteristics such as number density and length and width of hydrides in Zr–2.5 wt%Nbpressure tube. The hydrogen was charged cathodically and the hydride-contained sample was evaluated using the advancedanalysis methodologies. We performed a diff erential scanning calorimetry analysis to more quantitatively understand thethermodynamics of the hydride formation/growth process. We characterized the micrograph of hydride-contained Zr samplesto estimate the microstructural characteristics of the matrix and hydrides. We investigated eff ects of hydrogen concentrationand microstructure of matrix on determining microstructural measures of the hydrides. Particularly, we found that β phasein the matrix becomes isolated during the heat treatment same or above 475 °C and this change increases the inhomogeneousnucleation sites signifi cantly. We claim that the microstructure change of this matrix phase greatly increases the numberdensity of hydride.

高溫疲勞에서 싸이클依存型 및 時間依存型 疲勞크랙傳播의 遷移 : 싸인應力波 및 사디리꼴應力波에 대하여

成洛元,周原植,韓根祚 東亞大學校 大學院 1984 大學院論文集 Vol.8 No.2

A study on the nonlinear fracture mechanics was made on the low-cycle fatigue crack growth in SUS304 stainless steel under trapezoidal and sine stress wave at 650℃. The high temperature low cycle fatique crack growth behavior was classified into two categories: cycle-dependent and time dependent. The cycle-dependent crack growth rate correlated well with J integral range ?J, whereas the time dependent crack growth rate was characterized by modified J integral Jex. A parameter βwas found useful in predicting the transition from the cycle-dependent crack growth to the time-dependent crack growth. Conducting the experiment of high temperature fatigue crack propagation in trapezoidal, and sine stress wave, following conclusions were obtained. 1. Crack propagation behavior can be classified into cycle-dependent and time-dependent. 2. The transition of cycle-dependent crack propagation to time dependent one could be predicted bt either parameter βor ?J/ ?J?.

Garcin 증후군으로 발현된 연골육종 1예

강성수,김명권,박현미,류근신,신동진 대한신경과학회 1999 대한신경과학회지 Vol.17 No.2

철근 콘크리트 H.P 셀의 해석

성재표,강호근,박성수 釜山大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.49 No.-

본 연구는 철근 콘크리트 H.P. 쉘의 3차원 재료적 비선형 해석을 하기 위한 것이다. 콘크리트 요소는 3축 비선형 응력-변형률 거동, 균열, 파쇄 및 변형률 완화를 포함하는 3차원 16절점 고체 요소를 사용하고, 철근은 3절점 탄소성 트러스 요소를 사용한다. 거동 해석으로는 균열후 골재의 맞물림을 고려하는 유효 전단 계수를 도입하였으며, 수치 해를 얻기 위해 증분법을 사용하였다. 수치 예제로서 Lin의 철근 콘크리트 H.P. 쉘을 채택하여, 본 해석 결과와 비교하였다. This study presents the three-dimensional material nonlinear analysis of reinforced concrete H.P. shell. A concrete is idealized with three-dimensional 16-node solid element including triaxial nonlinear stress-strain behavior, cracking, crushing and strain softening; a steel with three-dimensional 3-node truss element including elastic-plastic behavior with strain hardening. The effective shear modules considering aggregate interlock after cracking and an incremental method is used to obtain a numerical solution. Numerical examples of Lin's reinforced concrete H.P. shell is selected to compare with the numerical results.

항타진동이 인접구조물에 미치는 동적영향 및 대처방안에 대한 연구

서상근,김태원,장병순 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

말뚝항타시 인접구조물에 손상을 주는 진동이 발생하는 것은 잘 알려져 있으며 이러한 진동으로 인한 구조물의 손상으로는 구조물에 생기는 균열 및 지반의 부등침하 등이 있다. 본 논문에서는 탄성이론에 근거하여 이동하는 파에 대한 성질을 정리하고 구조적으로 손상을 가하는 진동과 이러한 손상을 예방할 수 있는 방안을 제시하였다. 또한 현장에서 항타말뚝에 의한 진동을 측정하고 실측치와 본 논문에서 소개한 이론식에 의한 이론치와 비교하고 실제의 진동치로 구조물의 동적변형을 계산하였다. 마지막으로 항타진동에 대한 손상을 예방할 수 있는 대처방안에 대해 논의하였다. It is well known that the vibration of ground which damaged adjacent structures occurs in pile installation. This vibration problem mainly creates structure crack and ground settlement. In this paper, the nature of traveling waves is deduced from the theory of elasticity, structurally damaging vibrations and vibration limit preventing this damage are introduced. Also, through driven-pile test in the field. velocity of ground is measured and compared with values calculated from equation relating pile driving energy to the distance from source to a target structure. Finally managing vibration problem is suggested.

플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

Fin이 부착된 PCM 축열조의 효율성 분석

원성필,이근식 울산대학교 1985 연구논문집 Vol.16 No.2

Fig.1과 같이 PCM(Phase Change Material)蓄熱 system內의 熱傳達을 증가시킬 目的으로 PCM內에 얇은 금속 fin을 설치한 것을 model로 하여 善熱單位의 길이와 폭, fin 두께 및 벽면온도의 변화에 대한 效率的인 蓄熱條件을 熱力學 第一法則과 第二法則을 適用하여 提示하였다. A thermal energy storage using a PCM with fins is shown in Fig.1. Fins are set up increase the heat transfer rate within a PCM. Effective storage contraints have been presented by applying the first and the second law of thermodynamics when various parameters, e.g., the length and width of the storage unit, the thickness of the fin, and the wall temperature, are changed.

뇌에 양극성 전기응고강도의 효과와 시간경과에 대한 실험적 연구

송근성,이영우 부산의대 1988 부산의대잡지 - 부산대학교 의과대학 Vol.28 No.2

網点面積比率에 대한 色印刷物의 測色學的 解釋과 Munsell 表色系와 關係

李相南,盧相喆,金成根 釜山工業大學校 1982 論文集 Vol.23 No.2

Reproduced colors which are half-tone printed at the rate of 10, 20, 30,… 100% half-tone dot area by each process ink-cyan, magenta, yellow and at the rates of 0, 30, 60, 100% half-tone dot areas by the mean color mixing of black, cyan, magenta and yellow, are colorimetric analyzed by make use of the 1931 CIE XYZ system of color specification and matching the Munsell color system. Espacially, magenta and secondary colors which are contained magenta, do not have good uniformity and proportionalization in the dominant wavelength and the excitation purity. Half-tone colors without reflection of blue light, are reproduced ideal color with the excitation purity 100% in wavelengths from 555nm to 600nm.