Most of the Korea's small and medium sized firms have been subcontracted in mechanical and electronics industries. In Electronics industries, there is subcontracting in case of suppling numerous parts in non-mass jobbing production which is agreeable to production plans. To estimate processing cost of job-subcontracting which breaks irrationality, we make optimum processing cost yielding method which is changed easily by job analysis and job alteration.

1980년대 후반부터 집중적으로 연구되어온 기계적 합금화 공정 기술은 이제 단순화합물 조성의 합금화공정 뿐 만아니라 기계화학적(Mechanochemical) 방법으로까지 진보되어 다양한 시스템으로의 응용기술로까지 발전하게 되었다 더욱이 최근 나노기술의 한고상 제조기술로서도 역할을 하게 되는 기계적 합금화 공정 기술은 21세기에 있어서도 본문에서 연급한 바와 같은 고온용 고장도 Al 합금제조 외에도 나노결정립 분말, 자성재료, 에너지전환/저장기능재료, 준

This study investigated the relations among Korean phonological processing skills, English vocabulary knowledge, and the learning of new English words in 6th grade children. The children were tested in phonological awareness, phonological short-term memory, and naming speed tasks, as well as English vocabulary and paired-associate learning of Korean-English word pairs. Most tasks were significantly correlated with English vocabulary and paired-associate learning. In regression analyses, phonological awareness, short-term memory, and naming speed significantly predicted English vocabulary; and English vocabulary and naming speed predicted paired-associate learning. These results suggest that Korean phonological awareness, naming speed, and short-term memory are associated with English vocabulary knowledge and learning. These findings support the transfer of phonological processing skills across second languages.

This paper deals with the problem of batching and scheduling of jobs whose processing times are different respectively. But, they are given as not the exact value but the range from the lower limits to the upper, which makes it possible to group jobs into

There were two purposes of this study. The first was to research the effects of standard and fixed-split keyboards on wrist posture and movements during word processing. The second was to select optimal computer input devices in order to prevent cummulative trauma disorder in the wrist region. The group of subjects consisted of thirteen healthy men and women who all agreed to participate in this study. Kinematic data was measured from both wrist flexion and extension, and wrist radial and ulnar deviation during a 20 minute period of word processing work. The measuring tool was an electrical goniometer, and was produced by Biometrics Cooperation. The results were as follows: 1. The wrist flexion and extension at resting starting position were not significantly different (p>.05), however the angle of radial and ulnar deviation were significantly different in standard and split keyboard use during word processing (p<.05). 2. In the initial 10 minutes, the dynamic angle of wrist flexion and extension were not significantly different (p>.05), however the dynamic angle of radial and ulnar deviation was significantly different in standard and split keyboard use during word processing (p<.05). These results suggest that the split keyboard is more optimal than the standard keyboard, because it prevented excessive ulnar deviation during word processing.

This study was performed to study the removal efficiency of residual organophosphorus pesticides with process for making Perilla Jangachi. Two organophosphorus pesticides(chlorpyrifos-methyl and fenitrothion) were artificially attached to Perilla leaves. Then Perilla leaves were washed with detergent solution for 1minute and rinsed 2 times each for 1 minutes. After washing with neutral detergent solution, Perilla Jangachi was made with 2 steps of optimal condition. As a pretreatment, when soaked with 2% salt concentration solution for 42hours, the removal rate of residual pesticides was 81.75% of chlorpyrifos-methyl and 76.82% of fenitrothion. When Perilla leaves were steamed for 72 seconds after soaking, it became 88.94% and 82.19%, respectively. Finally, after making optimal Perilla Jangachi with 27% onion contents, removal rate was 89.12% of chlorpyrifos-methyl and 82.76% of fenitrothion. Consequently, it appeared that the process for making Perilla Jangachi effectively removed the residual pesticides of Perilla leaves.

기선장에 따른 GPS 위치 정도 및 분포를 측정하기 위하여 2002년 5월 29일부터 6월 2일까지 2대의 GPS수신기 (L1, 12채널)를 이용하여 고정점에서 30분에서 24시간동안 관측하는 실험을 수행하였다. 기준국(PKNU)과 이동, 국립지리원의 GPS 상시관측소에서 수신한 GPS 데이터는 동적 및 정적 후처리방식으로 처리하였으며, 그 결과를 요약하면 다음과 같다. 1. 2002년 5월 31일 차단각 (cut-off angle) 15˚에서 6시간 이상 관측 가능한 위성은 16개였고, 위성은 주로 동서방향으로 배치되어 있었다. 10분마다 평균한위성 수와 GDOP는 각각 8개, 3.89이었다. 2. 후처리 전후의 GPS 평균위치는 모두 기준점에서 남서쪽으로 편위 (단독 측위 : 1.17m, 후처리 : 평균 0.43m)되었다. 확율원 오차는 단독 측위가 6.65m이었고 이를 동적 후처리하면 단독 측위의 약 33.8%(표준편차 0=17.2), 정적 후처리하면 단독 측위의 약 5.3% (0=2.2)로 감소시 킬 수 있었다. 3. 정적 후처리방식으로 구한 기선장 x(Km)와 확률원 오차 y(m) 의 관계식은 y = 0.0016x + 0006 (R2=0.87)이었다. 본 연구에서 사용한 1주파용 GPS 수신기를 이용하여 정적 후처리방식으로 위치를 측정하는 경우, 기선장을 100Km 이내로 하고 GPS 수신시간을 30분 이상으로 하면 확율원 오차 20 Cm 이내의 측위가 가능함을 알 수 있었다.

In this paper, the life cycle assessment(LCA) methodology is applied to Personal Computer in materials processing stage in order to analyze the impact to the environment. LCA data collection is carried out taking into account on main materials of PC in materials processing stage. And the impact assessment is the environmental burdens on three factor in air emission(CO2, SOx, NOx), five factor in water emission(BOD, COD, SS, N, P), and three factor in transported substance(cl, NH4, SO4). According to the result, the loading in the materials processing stage of PC proved to be used total energy 6,285Mj and emitted CO2 259.8kg, SOx 3,571g, NOx 330g, COD 1,328g, P 246g, N 2,434g.

This paper deals with the problem of batching and scheduling of jobs whose processing times are given as the duration from the lower limits to the upper, which makes it possible to group jobs into batches. The grouping of jobs is desirable because of the capability of the batch processor to accommodate several jobs at once. The time required to process the jobs in any batch depends on their lower limit processing times. Once processing is initiated on a batch processor, the batch cannot be interrupted, nor can other jobs be started. And all jobs are assumed to be simultaneously available. This paper develops the model to describe these situation and a heuristic method to minimize its total tardiness.

Objective : The purpose of this study was to compare the sensory-based behaviors of young children with and without cerebral palsy as reported by their parents on the Short Sensory Profile.Method : Short Sensory Profile questionnaire was completed by parents of 59 children with cerebral palsy 1 through 9 years of age and parents of 129 children without cerebral palsy 1 through 6 years of age.Results : The performance of children with cerebral palsy was significantly different form that of children without cerebral palsy on 4 of 7 factors. Factors were difference found included Movement Sensitivity, Auditory Filtering, Low Energy/Weak, Visual/Auditory Sensitivity. Conclusion : Finding from the study suggest that young children with cerebral palsy have probable deficit in a variety of sensory processing abilities as measured by the Short Sensory Profile. The Short Sensory Profile can provide information about the sensory processing skills of children with cerebral palsy to assist occupational therapist in assessing and planning inter-vention for these children.

본 연구에서는 악보 읽기에서 나타나는 전문가와 초보자의 작업기억에서의 처리 유형의 차이를 연구하기 위해 조음 억제 조건을 사용하여 2개의 실험을 실시하였다. 실험 1에서는 8개의 4분 음표가 스크린에 제시되었다가 사라지면, 참가자가 그 음표들을 기억해서 악보에 그리도록 했다. 자극은 선율적인 멜로디와 비선율적인 멜로디로 나뉘어졌다. 같은 방법으로, 실험 2에서는 각각 3개의 음으로 구성된 4개의 코드가 제시되었다. 자극은 화성적인 코드와 비화성적인 코드로 나뉘어졌다. 실험 1과 2의 분석 결과, 초보자는 공통적으로 조음 억제를 하지 않은 조건에서 조음 억제 조건보다 나은 수행을 보였다. 하지만 전문가들은 화성적 자극에 대해서는 상대적으로 조음 억제의 영향을 덜 받았다. 이러한 결과는 초보자가 조음 루프에 전적으로 의지하여 음을 처리하는 반면, 전문가는 자극이 친숙할 경우, 조음 루프로 정보를 넘기기 전에 시공간 잡기장을 통해 음을 부호화할 수 있음을 암시한다.

사이드 스캔 소-나를 이용한 해저면 음향영상자료의 처리과정에서 가장 첫 번째 단계는 수중예인체의 절대위치를 결정하는 것이다. 예인체를 조사선박에 부착하지 않고 후미에서 수중예인하기 때문이다. 수중에서 음향을 이용하여 위치를 추적하는 장치나 예인체의 움직임을 관측하는 추가적인 지원장비 없이도 절대위치를 계산할 수 있는 기술적인 알고리즘이 제안되었다. 예인항적으로 작성된 모자이크 결과도면에서, 인접한 측선 간의 불일치나 모호하게 접합되는 해저형태를 발견할 수 없었다. 절대위치 계산과정에서 수중예인체의 진행방향이 부드럽게 되는 부차적인 효과가 있다. 그 결과 진행방향에 대하여 수직으로 분포하는 영상자료의 펼침형태가 안정적으로 배열되며 음향조사역(音響照射域)의 평면투영에서 자료의 유실현상도 현저하게 줄어든다. 수중에서 예인하는 방식의 다른 분야 해양조사에서도 이 연구결과의 적절한활용이 기대된다.

Nano-sized Ni-ferrite powder was fabricated by spray pyrolysis process using the waste solution resulting from shadow mask processing. The average particle size of the powder was below 100 nm. The effects of the concentration of raw material solution, the nozzle tip size and air pressure on the properties of powder were studied. As the concentration increased, the average particle size of the powder gradually increased and its specific surface area decreased, but size distribution was much wider and the fraction of the Ni-ferrite phase greatly increased as the concentration increasing. As the nozzle tip size increased from 1 mm to 2 mm, the average particle size of the powder decreased. In case of 3 mm nozzle tip size, the average particle size of the powder increased slightly. On the other hand, in case of 5 mm nozzle tip size, average particle size of the powder decreased. Size distribution of the powder was unhomogeneous, and the fraction of the Ni-ferrite phase decreased as the nozzle tip size increasing. As air pressure increased up to 1 kg/, the average particle size of the powder decreased slightly, on the other hand, the fraction of the Ni-ferrite phase was almost constant. In case of 3kg/ air pressure, average particle size of the powder and the fraction of the Ni-ferrite phase remarkably decreased, but size distribution was narrow.