• Journal of The Korean Association For Science Education
• /
• v.18 no.1
• /
• pp.35-42
• /
• 1998

To investigate 13 year old pupils' suggested aims, recognition of relevant variable, and the relationship between the suggested aim and the conclusion which is drawn by pupils, we classified experiments in textdbook into three cases: (1) Case involving dependent variable and independent variable in the title of experiment, (2) Case involving dependent variable only, where pupils can know independent variable from the content of textbook, (3) Case involving dependent variable only, where pupils hardly can know independent variable from the content of textbook. In respect of the aims which pupils suggested, the suggested aims were reduced to the title of experiment in case(1). However, the suggested aims were divided into several forms which is not relevant to the content of experiment in case (2), (3). This shows that pupils are affected by the title of experiment according to how the variable is involved in the title of experiment. This is supported by the fact that when the variable is described in the title, the suggested aim is reduced to the title of experiment. On the other hand, there was a relationship between the suggested aim and the drawn conclusion in case (1). But there was few relationships in case (2) and (3). Surprisingly, the drawn conclusion in case(1) was not consistent with the expected one because of the inappropriate experimental setting. We need to be more careful in experimental setting, pupils' cognitive ability, and openness of experiment to help pupils perform experiment successfully.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.3 no.3
• /
• pp.46-57
• /
• 1995

The aim of the present study is to provide fundamental informations for the development of magneticfluid actuator. To achieve the aim, oscillation characteristics of the magneticfluid plug are investigated by experiment for the various length and position of the magneticfluid plug and the frequency of magnetic field. The oscillation characteristics are obtained. Amplitude, natural frequency, phase shift and damping ratio, are compared with theoretical values. From the study, the following conclusive remarks can be made. The experimental equation for the magnetic field is obtained. The critical magneticfluid length exists and its value is about 70mm. The range of the damping ratio and fluid loss coefficient obtained by experiment are 0.1~0.2 and 30~100, respectively. Comparison between experimental and theoretical results of oscillation characteristics shows good agreement in the high frequency range. Meanwhile, in the low frequency range, there appears little discrepancies(5% in the frequency and amplitude and 10% in phase difference and damping ratio) with each other.

• The Journal of Korea Robotics Society
• /
• v.7 no.2
• /
• pp.76-82
• /
• 2012

In this study, we aim to develop energy efficient walking and running robot with compliant leg. So, we propose the energy efficient locomotion control method. And, we experiment the proposed control method applying to the experimental robot with compliant leg. From the experiment, we look at whether the proposed control method can the robot walk and run energy efficiently.

• Journal of the Korean institute of surface engineering
• /
• v.50 no.2
• /
• pp.91-97
• /
• 2017

The aim of this paper is to investigate the characteristics of electrochemical corrosion with the plasma ion nitriding temperature for 16Cr-10Ni-2Mo stainless steel. The corrosion behavior was analyzed by means of galvanostatic experiment in natural seawater that applied various current density with plasma ion nitriding temperature parameters. In result of galvanostatic experiment, relatively less surface damage morphology and the less damage depth was observed at a nitrided temperature of $450^{\circ}C$ that measured the thickest nitrided layer(S-phase). On the other hand, the most damage depth and unified corrosion behavior presented at a temperature of $500^{\circ}C$.

• Agribusiness and Information Management
• /
• v.7 no.2
• /
• pp.1-11
• /
• 2015

This study has performed a comparative analysis between groups based on Time To First Fixation, Fixation Duration, Fixation Count and Total Visit Duration, which are eye-tracking analysis indicators on what visual attention is shown compared to the e-magazine produced as regular images related to e-magazines in which experiment subjects have applied cinemagraph images as eye tracking research on the e-magazine produced with cinemagraph images and e-magazines produced with regular images. The experiment sample used e-magazines composed of nine pages while AOI (area of interest) has been set up on each page by classifying image and text regions. A combined 30 people took part in the experiment, which was performed by randomly assigning 15 to the experiment group and 15 to the control group. According to the results of the analysis, the experiment group recorded a shorter time than the control group on the e-magazine produced with cinemagraph images through Time To First Fixation. Though no significant difference was found between the experiment and control groups in Fixation Duration, a substantial difference did appear between Fixation Duration and Total Visit Duration.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.1 no.2
• /
• pp.123-130
• /
• 1997

The effect of experimental factors on the Freeze-Thaw durability in the High Strength Concrete has been analyzed and investigated with [DESIGN of EXPERIMENT: L16). The Experimental parameters included the type of aggregate and mixer, the conditions of aggregates, and the difference of mixing temperature, procedure and placing, etc. It is aim of this study to provide the fundamental data on the effect of various factors on the frost resistance of high strength concrete for the practical use and research data accumulation of durability inspection. The results of this experiment indicate that the freeze-thaw durability of high strength concrete is markedly affected by the coarse aggregate source, mixing temperature and curing conditions.

• Journal of Sericultural and Entomological Science
• /
• v.10
• /
• pp.73-75
• /
• 1969

There are two fold aims in this experimental study. The aim is to investigate the bacteria which produce the high activity enzyme or the cocoon for utilization to the textile and the industry. The ether is to protect against the bacteria that damage silk protein during storage. The results are summarized as followes: 1. Among the isolated bacteria from the cocoon, No 4 strain had the high activity of the $\alpha$-amylase. But this strain had not been identified. The results of experiment is shown in the table II. 2. Among the isolated bacteria from the cocoon, No II strain had the high activity of the protease on substance of the casein. The results of the experiment is shown in the table II. 3. The bacteria which had the high activity of the degumming effect of the sericin, the part of the operation for 7 days was higher part of the operation for 3 days. The results of the experiment are indicated in Fig I and Fig II.

• Current Photovoltaic Research
• /
• v.1 no.2
• /
• pp.122-125
• /
• 2013

The Floating Photovoltaic System was installed on the surface of water. There were some researches in this subject. But there was not many studies with experiment on a high waterproof Floating Photovoltaic modules. The aim of this study was to analyze the performance of the Floating Photovoltaic System. For this experiment, a high waterproof Floating Photovoltaic modules were designed and applied to the module capacity of 10 kW Tracking-Type structure. The experiment results indicated the performance of the daily production is 51.6 kW; the production capacity of Floating Photovoltaic System is expected to be 23% higher than that of the ground-mounted photovoltaic system.

• Journal of Veterinary Clinics
• /
• v.23 no.1
• /
• pp.36-40
• /
• 2006

The aim of this study is to clarify the therapeutic effect of hemodialysis (HD) on acute renal failure in dogs experimentally induced by ethylene glycol (EG) ingestion in experiment 1(HD on 12 and 36 hours after EG injestion) and experiment 2(HD on 24 and 48 hours after EG injestion). Clinical signs such as vomiting, depression, ataxia and knuckling were improved on experiment 1 and 2. White blood cell (WBC) and platelets (PLT) were decreased, and packed cell volume (PCV) was increased after hemodialysis, however, no significant differences were observed in experiment 1 and 2. BUN, creatinine and phosphorus was significantly decreased in experiment 1 and 2, respectively. These results suggested that hemodialysis was effective for acute renal failure in dogs induced by EG ingestion.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.17 no.4
• /
• pp.1-7
• /
• 2003

This is basic study for analyzing the character of the evaluation according to the ways of exterior lighting through the image prediction experiment by computer simulation. The aim of this research is to verify the validity of physical quantity & subjective evaluation on the basis of Online experiment. The following carried out the experiment procedure by conditions of Online experiment, 1) to make a photo of Online experirrent, 2) to measure physical quantity of luminance, and 3) to do subjective evaluation in Online experiment by means of vocabulary of the evaluation through preparation experiment. Then to verify the validity of Online and CG experiment, Online and photo experiment with each subjective evaluation results. The result of this study is that the validity difference is within 5% in the verification the validity of the physic amount, which showed little difference. While in verification of subjective evaluation of online and CG, online and photo experiment, the result is showed little difference as well except a little the item.