• 대한기계학회논문집A
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• 제25권1호
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• pp.32-38
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• 2001

This paper presents an approximate synthesis of 5-SS multi link suspension for 2 D.O.F motions. In the proposed synthesis method, alteration curves of camber, toe, kingpin and caster angles are optimized during the bump rebound and the steering motions. And joint positions can be located within desired boundari es. Especially, steering motions are considered for control of kingpin offset and caster trail. Prescribed motions contain both wheel center positions and imaginary kingpin axes in the multi link type suspension. Constraint equations are formulated with di splacement matrix and velocity matrix using instantaneous screw axis.

• 대한기계학회논문집A
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• 제24권4호
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• pp.881-893
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• 2000

An analytical synthesis technique for offset slider-rocker 4-bar linkages is devised where transmission angles are used as essential synthesis parameters. Finding the location where both the maximum and the minimum transmission angles arise leads to establishing the algorithm for limiting transmission angles of the slider-rocker linkage which has different offsets according to the direction of the slider. Position analysis by the algorithm gives formula for the dimensional synthesis for the linkage. Application to examples shows that the algorithm and the formula yield proper slider-rocker linkages with regard to limiting transmission angles to the maximum value.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.561-564
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• 2005

Gasification has been regarded as a very important technology to decrease environmental pollution and to obtain higher efficiency. The gasification process converts carbon containing feedstock into a synthesis gas, composed primarily of CO and $H_2$. And the synthesis gas can be used as a source for power generation or chemical material production. Through more than nine years, IAE developed and upgraded several gasification/melting pilot plant system, and obtained a good quality synthesis gas. This paper illustrates the gasification characteristics and operation results of two 3 ton/day synthesis gas production facilities. One is entrained-bed slagging type coal gasifier system which is normally operated in the temperature range of $1,400\~1,450^{\circ}C,\;8\~10$ bar pressure. And the other is fixed-bed type gasification/melting furnace system using MSW and industrial wastes as a feedstock.

• 한국세라믹학회지
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• 제33권4호
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• pp.399-404
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• 1996

Hydrothemal synthesis of PbTiO3 has been investigated. A comprehensive thermodynamic model for heteroge-nous reacting solid-aquous system has been used to predict the optimum condition for the synthesis. Synthesis were performed using lead acetate trihydrate as Pb source crystalline TiO2 as Ti source and KOH as minerali-zer. The synthesis has been examined at low temperature (16$0^{\circ}C$) Phase pure perovskite PbTiO3 has been obtained at high pH(above 0.5 mol KOH). The morphology of PbTiO3 was acicular shape. It has been found sible for a distortion in the c direction. The water is gradully released on annealing the powder to 40$0^{\circ}C$ and the normal crystallographic properties are restored.

• 한국동물학회지
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• 제18권1호
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• pp.41-49
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• 1975

DNA 回復合成과 染色體交換과의 聯關性을 추구하기 위해 감마線을 照射한 BHK-21 과KB 細胞의 DNA 回復合成의 線量反應과 時期를 調査하였다. 감마 線에 의한 DNA 回復合成率은 5kR까지 照射線量에 比例하나 그후 50kR 까지는 變化가 없었다. DNA 回復合成의 初期 線量反應은 細胞에 따라 다르나 照射후 1$\\sim$2時間까지 지속하였다. 감마 線에 의한 染色體交換은 細胞에 따라 다른 感受性을 보였고 DNA 回復合成과의 聯關性을 보여주지 않았다.

• 한국가스학회:학술대회논문집
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• 한국가스학회 2005년도 추계학술발표회 논문집
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• pp.83-87
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• 2005

The kinetics of the direct synthesis of DME was studied under different conditions over a temperature range of $220\~280^{\circ}C$, syngas ratio $1.2\~ 3.0$ All experiment were carried out over hybrid catalyst, composed to a methanol synthesis catalyst (Cu/ZnO/$Al_2O_3$) and a dehydration Catalyst ($\gamma$-Al_2O_3$) The observed reaction rate qualitatively follows a Langmiur-Hinshellwood type of reaction mechanism. Such a mechanism is considered with three reaction, methanol synthesis, methanol dehydration and water gas shift reaction. From a surface reaction with dissociative adsorption of hydrogen, methanol and water, individual reaction rate was determined

• Asian-Australasian Journal of Animal Sciences
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• 제9권2호
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• pp.171-174
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• 1996

Muscle protein synthesis in vitro was measured in chicks fed low-protein(10% CP) and control(20% CP) diets. Right leg muscles (M. gastrocnemius) were mounted on a support made of stainless steel to stretch in constant tension, whereas left leg muscles were unmounted. Both leg muscles were incubated in Dulbecco's modified Eagle's medium including L-[$4-^3H$] phenylalanine for 60 min to measure in vitro protein synthesis. There was no significant difference in fractional synthesis rate(FSR) of muscle protein between both dietary protein levels, whereas FSR with stretch in constant tension was significantly higher than that without constant tension due to an increase in the absolute synthesis rate(ASR) per unit RNA(the efficiency of RNA to synthesize protein). The ASR of muscle protein in chicks fed the control diet was significantly higher than that in the low-protein diet group.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.464-466
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• 2014

The mechanism synthesis methods, graphical, analytical and computer-aided technique have been proposed for selecting and scaling mechanical system. According to developing computation tools, mechanism could be synthesized much faster and more correct than previous analytical ways by improved techniques. In this paper, the improved synthesis method is proposed to solve body guidance synthesis problem. To perform the mechanism synthesis for body guidance, a planar linkage is modeled as a set of free three bushings located in design space. The values of bushing stiffness and x, y position of bushings yielding a desired functional requirement related to input motion are found by using an optimization technique.

• The Korean Journal of Ceramics
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• 제6권3호
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• pp.250-257
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• 2000

The feasibility of synthesizing SiC-AlN solid solution by field-activated combustion synthesis was demonstrated. At lower fields of 8-16.5V/cm, composites of AlN-rich and SiC-rich phases were synthesized, but at fields of 25-30 V/cm, the product was a 2H structure solid solution. Combustion synthesis of the solid solution by nitridation of aluminum with silicon carbide under a nitrogen gas pressure of 4-8 MPa was also investigated. The maximum combustion temperature and wave propagation velocity were found to be influenced by the electric field in the field-activated combustion synthesis, and by the green density and nitrogen pressure in the combustion nitridation. In both cases the formation of solid solutions is complete within seconds, considerably faster than in conventional methods which require hours.

• 한방안이비인후피부과학회지
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• 제21권1호
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• pp.96-103
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• 2008

Objective : This research was carried out to compare the effect of Gorynju and a Soju extract Psoraleae fructus on melanin synthesis of B16 melanoma cells. Methods : To investigate melanin synthesis of B16 melanoma cells, this research was measured cell survival, tyrosinase activity, melanin synthesis, western blot. Results : Both Gorynju and Soju extract Psoraleae fructus, cell toxicity depended on the density. Tyrosinase activity depended on the density of Gorynju extract Psoraleae fructus and statistic was showed significant(0.5, 1, 2, 3 ${\mu}g/ml$), in a Soju extract Psoraleae fructus, 1 ${\mu}g/ml$ were showed significant. Melanin synthesis was showed significant in a Soju extract Psoraleae fructus(3, 4 ${\mu}g/ml$). Western blot was showed to depend on the density of Gorynju and a Soju extract Psoraleae fructus. Conclusions : In a tyrosinase activity and a melanin synthesis, the intermediate alcohol of Gorynju and a Soju may be suitable to use.