Synthesis gas is produced commercially by a steam reforming process. However, the process is highly endothermic and energy intensive. Thus, this study was conducted to produce synthesis gas by the partial oxidation of methane to cut down the energy cost. Supported Ni catalysts were prepared by the impregnation method. To examine the activity of the catalysts, a differential fixed bed reactor was used, and the reaction was carried out at 750~850℃ and 1 atm. The fresh and used catalysts were characterized by XRD, XPS, TGA and AAS. The highest catalytic activity was obtained with the 13wt% Ni/MgO catalyst, with which methane conversion was 81%, and H2 and CO selectivities were 94% and 93%, respectively. 13wt% Ni/MgO catalyst showed the best MgNiO2 solid solution state, which can explain the highest catalytic activity of the 13wt% Ni/MgO catalyst.

In the conventional metallothermic reduction (MR) process for obtaining tantalum powder in batch-type operation. it is difficult to control morphology and location of deposits. On the other hand, a electronically mediated reaction (EMR) process is capable to overcome these difficulties and has a merit of continuous process, but it has the defect that the reduction yield is poor. MR-EMR combination process is a method that is able to overcome demerits of MR and EMR process. In this study, a MR-EMR combination process has been applied to the production of tantalum powder by sodium reduction of TaF. The total charge passed through external circuit and average particle size (FSSS) were increased with increasing reduction temperature. The proportion of fine particle (-325 mesh) was decreased with increasing reduction temperature. The yield was improved from 65% to 74% with increasing reduction temperature. Considering the charge, impurities, morphology, particle size and yield, an reduction temperature of 1,123 K was found to be optimum temperature for MR-EMR combination process.s.

본 연구는 상지운동 동안에 복부에 적용된 압력이 요부와 복부의 근피로도에 미치는 영향을 알아보았다. 연구대상자는 성인 남자 5명이었다. 연구대상자가 10 repetitions maximun (RM) 무게의 아령을 이용하여 1분 동안 상지운동을 수행 시 0 mmHg, 저압(30 mmHg), 중압(70 mmHg), 고압(100 mmHg)의 외부 압력이 복부에 적용되었고, 복직근, 외복사근, 내복사근, 척추기립근에서 근전도 자료가 수집되었다. 주파수 분석을

본 연구는 슬관전 신전 직전에 수행된 선행 슬관절 굴곡이 슬관절 신전근의 최대 근력발생 및 근육 활성도(activation)에 미치는 영향을 알아보기 위하여 실시되었다. 16명의 정상인이 Cybex II 등속운동기구에서 3가지 다른 운동 속도(, , )와 2가지 다른 근육 활성 조건(선행부하가 없는 조건과 선행부하 조건)에서 슬관절의 최대 신전을 수행하였다. 연구대상자들에게 선행부하 없는 조건에서는 슬관절 굴곡 상태에서 까지 최대 신전을 수행하도록 하였

Objectives : To study and compare the effects of monocular patching and half-eyes patching on the unilateral neglect of stroke patients.Methods : Eleven stroke patients with the unilateral neglect were enrolled. To these patients eight tests such as line bisection test, Albert’s test, letter cancellation test, shape cancellation test, house copying, daisy copying, clock drawing, and reading task were applied for the evalua-tion of the unilateral neglect. These tests were done without patching and with monocular and half-eyes patching respectively.Results : Eye patching methods were effective for reducing the unilateral neglect in 11.1 ∼ 57.1% of patients. Half-eyes patching was significantly effective in clock drawing test(p=.02), In general half-eyes patching was more effective than monocular patching.Conclusion : We suggest that eye patching method could be used as an effective and prac-tical way to reduce the unilateral neglect of the stroke patients.

The trends in building construction these days are moving towards having better work space and greater suitability for the use of information technology, Therefore people can work in a more relaxed, delightful and pleasant environment. So accidents like fire could cause the mass destruction of human beings. In this paper, we estimated the escape time from a building and simulated the study results on computer to see how safe it would be in a real situation.

Median frequency can be regarded as a valid indicator of local muscle fatigue. As local muscle fatigue develops, the muscle fiber conduction velocity decreases, the fast twitch fibers are recruited less, and consequently the median frequency shifts toward the lower frequency area. The aim of this study was to test the characteristics of the median frequency according to exercise load (30% and 60% of MVC on the biceps brachii, 40% and 80% of MVC on the vastus lateralis) during the fatiguing isometric exercise. Thirteen healthy male volunteer students of Yonsei University were recruited. After the testing maximal voluntary isometric contraction, three variables (initial median frequency, regression slope, fatigue index) from the regression line of MDF data were measured in each exercise load. The results showed that the regression slope and fatigue index were significantly different for the biceps brachii, but not for the vastus lateralis initial MDF was not significant difference according to the exercise load on both muscles. The regression slope and fatigue index could monitor physiologic muscle change during fatiguing isometric exercise. The results showed that two MDF variables reflect the local muscle fatigue according to the exercise load.

The purpose of this study was to compare the muscle activity during a push-up on a suspension sling and a fixed support at the same level. Tests were performed on 15 male subjects. Electromyography using a surface EMG recorded the activity of the triceps, pectoralis major, and internal and external oblique muscles during each push-up. EMG activity was recorded at 0, 45, and 90 degrees of elbow flexion in the push-up position on a suspension sling or a fixed support at the same height above the floor (30 cm). The testing order was selected randomly. The subjects were asked to maintain the push-up position with straight knees, hips, and trunk for 5 seconds at each elbow angle. The mean root mean square (RMS) of EMG activity was calculated. EMG activity was normalized using the maximum voluntary isometric contractιn elicited using a manual muscle testing technique. Two-factor repeated measures analysis of variance (ANOVA) was used to compare the average RMS value of EMG activity for each condition. The EMG activity for the pectoralis major, and internal and external oblique muscles during a push-up on a sling was significantly higher than on a fixed support at all angles of elbow flexion (p<.01). There were significant differences in the EMG activity of the pectoralis major and triceps brachii muscles at difference angles of elbow flexion (p<.05). The pectoralis major muscle had the highest EMG activity at 90 degrees of elbow flexion on both the sling and fixed support. The triceps brachii muscle had the highest EMG activity at 45 degrees of elbow flexion on both the sling and fixed support. The internal and external oblique muscles had the highest EMG activity at 0 degrees of elbow flexion, although the difference with angle of flexion was not significant. These results suggest that to improve proximal and trunk stability and muscle strength, push-ups are more useful when performed on a suspension sling than On a fixed support.

〈勘皮靴單證二郞神〉작품은 《三言》의 공안소설작품 중에서 상당히 성공한 작품이라고 할 수 있다. 《三言》중에서 실제로 완전한 공안소설 구조를 갖춘 작품은 10편 정도 밖에 되지 않는다. 그러나 비록 명확하지는 않지만 어느 정도의 공안소설의 형식적 특징이나 서술방식을 가진 작품은 이보다 훨씬 많다고 할 수 있다.〈勘皮靴單證二郞神〉은 줄거리구조ㆍ서사기교ㆍ인물묘사ㆍ주제 등이 분명하여 공안소설작품 중에서 좀처럼 보기 드문 수작이다. 지금까지 공안소설을 연구한 논문은 다른 연구주제보다 적을 뿐 아니라 이미 연구가 되어 있은 작품들은 대부분이 그 연구범위를 크게 설정하여 세심한 고찰이 힘들거나， 아니면 반대로 공안소설의 일부 형식적인 특징에만 너무 치중하여 작품의 서사구조위주로 분석해왔다. 공안소설의 작품을 단독으로 연구한 논문도 그리 많지 않을뿐더러 주요형식을 제외한 다른 접근 방식으로 연구한 사례는 그리 많지 않다. 공안소설이 「作案」(성립)、 「學告」(보고)、 「審案」(심사)、 「貞破」(해결)、 「判案」(판결)등의 형식이 다른 애정이나 지괴의 소설작품보다 분명하게 드러나는 것은 사실이나， 만약 이러한 형식적인 특징과 구조에만 치우쳐 분석하다보면 작품 속의 여러 가지 내용과 현상ㆍ주제와 인물， 그리고 문화적인 배경과 사회에 대해서는 쉽게 지나치게 된다. 그래서 본 논문은 馮夢龍이 편찬한《三言》중에서 공안소설로서는 상당히 성공적인 작품이라고 할 수 있는 〈勘皮靴單證二郞神〉을 연구대상으로 삼아 공안소설의 특징 및 형식을 기초로 하여 문화적인 특징과 역사를 종적인 축으로 삼고， 내용ㆍ인물ㆍ구조ㆍ서사를 횡적인 축으로 삼아 다양한 접근방식으로 이 작품을 연구하려 한다.