• 임상간호연구
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• 제14권1호
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• pp.113-123
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• 2008

Purpose: This study was done to provide support material to traditional nursing interventions through investigation of the effect of Auricular acupressure therapy for female staff in the hospital who have dysmenorrhea but cannot be absent from work even with severe symptoms affecting their work and therefore cannot get proper pain management. Method: The participants in this study were 62 women were working in the G-university hospital in Jin-ju, assigned to experimental (30) and 32 control groups (32). The study method was a quasi-experimental, nonequivalent control group non-synchronized design. The experimental group received acupressure treatment (a pin was attached to tape) on the special stimulation points in the inside of the ear, 5 times for 5 seconds, morning, afternoon, and night. Tape without the pressure pin was applied to the same points for women in the control group to evaluate placebo effect. Data were collected from May to November 2007 and were analyzed using SPSS PC+ 12 version. Descriptive statistics, t-test, $x^2-test$, Fisher's exact test, paired t-test, were used to analyze the data. Results: The experimental group showed a significant decrease in dysmenorrhea compared to the control group (t=-2.743, p<.01). In the sub-part, the experimental group showed menstruation related pain (t=-3.726, p<.01), menstruation related to behavioral change (t=-2.421, p<.05) and symptoms however, there was no significant difference related to attention deficit, water retention, and negative image. Conclusion: Application of auricular acupressure therapy was approved for this study and although auricular acupressure therapy was not effective for all of the symptoms, it was effective for dysmenorrhea.

• 대한임상검사과학회지
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• 제40권2호
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• pp.153-162
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• 2008

The main purpose of this study was to investigate relationship between WRMD (Work Related Musculoskeletal Disorders) symptoms and dangerous factors in medical technologistes who work in Gwang-ju city and Jeollanam-do province. Experimental group was 74 medical technologistes at hospital centers, hospitals, general hospitals, university hospitals. From the this survey, we found that significant statistical difference in WRMD symptoms by general characteristics (sex, exercise) and working environmental characteristics (examination numbers, time of margin, repetition, intensity of work, time of using PC). In the general factors, Odds ration in male vs female, do exercise vs do not exercise were 4.557 (95% CI=1.003-20.713), 2.747 (95% CI=0.59-12.783). In working environment factors, Odds ration in little of examination numbers vs a lot of examination numbers, little of time margin vs a lot of time margin, non repetitive vs repetitive, non intensity of work vs intensity of work, little of pc using time vs a lot of pc using time were 1.901 (95% CI=0.828-4.363), 1.15 (95% CI=0.335-3.944), 3.952 (95% CI=1.095-14.262), 1.411 (95% CI=0252-7.891), 2.606 (95% CI=1.055-6.437) respectively. For prevention of WRMD symptoms, Most of hospitals should improve medical technologists of working circumstances, especially control a intensive of work, working speed and guarantee enough break time. Therefore, This study suggests that increasing workers and examination of automation, streching during working be needed.

• 한국콘텐츠학회논문지
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• 제5권1호
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• pp.189-199
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• 2005

그리드 컴퓨팅은 과학기술 분야의 큰 문제들을 해결하기 위해 네트워크 상에 분산된 수많은 컴퓨터들의 컴퓨팅 파워와 대용량 저장장치를 공유하여 문제들을 해결할 수 있는 기술이다. 그리드 컴퓨팅의 환경은 WAN으로 구성된 각기 다른 성능과 이질적인 네트워크 상태들로 구성된다. 그래서, 이러한 이질적인 성능요소들을 고려하여 계산 작업에 반영시키는 것이 무엇보다 중요하다. 본 논문에서는 네트워크 상태정보를 고려한 노드별 작업 프로세스 수를 결정하는 효율적인 방법을 제안한다. 네트워크 상태정보는 latency, bandwidth, latency-bandwidth 혼합정보를 고려한다. 먼저, 측정된 네트워크 상태정보를 이용하여 노드별 성능비율을 구하고 이를 통해 작업 프로세스 수를 결정한다. 마지막 단계에서는, 결정된 노드별 작업 프로세스 수를 기반으로 자동으로 RSL 파일을 생성하여 작업을 수행한다. 네트워크 성능정보는 NWS(Network Weather Service)에 의해 수집된다. 실험결과에 따르면, 네트워크 성능정보를 고려한 방법이 그렇지 않은 기존의 균등방식보다 작업량, 작업 프로세스 수, 노드 수 관점에서 각각 23%, 31%, 57% 성능이 향상되었다.

• 한국생활과학회지
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• 제17권6호
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• pp.1205-1213
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• 2008

Material is a factor for maximizing formative aspect among fashion design factors. Therefore, central axis of modern fashion is performing various trials for escaping from existing cloth and searching for artistic value. Especially, Korean paper is a formative material, which is manufactured through traditional manual work in Korea. The material is used in various fields on the basis of its aesthetic feature. Especially, fashion field performs handcraft activity on the basis of mulberry pulp, which is a prime material of Korean paper. Because the activity can be reinterpreted by world designers, who want to find motive of fashion material in the third world, it is necessary to perform experimental study for developing expressive form on the basis of diversity of Korean paper material. Therefore, the purpose of this study is to perform experimental study by focusing on the development of Korean paper material in order to express formative feature. The study purposes are as follows. The first purpose is to reinterprete the theory through actual work of fiber formation using Korean paper in the current flow where art and design field are fused and compromised. The second purpose is to suggest vision of material development on the basis of formative feature to fashion world focusing its eyesight to Asia and the third countries. The study results are as follows. First, Korean paper has been evaluated as proper material for the fusion of design and art because of its handicraft feature, long-term preservation, heat insulation, absorption, diversity and eastern feature. Second, the study performed various trials for artistic dress material by developing 12 Korean paper works and suggested the development of new material on the basis of formative feature of modem fashion industry.

• 문화기술의 융합
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• 제9권4호
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• pp.569-576
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• 2023

농업용 드론은 경제적 효율성으로 인해 활용도가 점차 증가하고 있으며, 비행을 담당하는 본체와 약제를 방제 대상까지 전달하는 임무를 담당하는 분무 시스템으로 구성되어 있다. 따라서 드론을 활용한 농약 방제 작업 시 농작물에 대한 환경과 특성이 고려되어야 하며, 이에 따른 체계화된 비행 고도, 속도 및 분사 시간 등 조건이 달라져야 한다. 농업용 드론을 이용한 방제 작업은 조종자의 운용에 의존하고 있으며, 운용 숙련도에 따라 살포 효과 및 영향에 차이가 발생한다. 또한 농업용 드론에 관해 운용 기준 및 방제 효율 등의 편차가 발생하여 방제 작업 분야에서 농업용 방제 드론의 보급을 저해하는 요소로 작용하고 있다. 이에 본 연구에서는 농업용 드론의 살포 특성을 파악하여 유효 살포 시간 및 간격을 적용하고, 선행 연구와 비교하여 방제면적 산출이 가능한 체계를 실험적으로 검증하려 한다. 이러한 실험적 검증을 통해 농업용 드론에 운용 방식 및 체계화된 수치를 적용하여, 방제 작업의 저해요인을 최소화하여 최적의 방제 공정을 적용하고자 한다.

• 대한기계학회논문집A
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• 제27권5호
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• pp.750-757
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• 2003

In order to determine creep stress intensity limit of high-temperature components, the usefulness of the creep work and time equation, defined as W$\_$c/t$\^$p/ = B(where W$\_$c/ = $\sigma$$\varepsilon$ is the total creep work done during creep, and p and B are constants), was investigated using the experimental data. For this Purpose, the creep tests for generating 1.0% strain for commercial type i16 stainless steel were conducted with different stresses; 160 MPa, 150 MPa, 145 MPa, 140 MPa and 135 MPa at 593$^{\circ}C$. The plots of log W$\_$c/ - log t showed a good linear relation up to 10$\^$5/ hr, and the results of the creep work-time relation for p, B and stress intensity values showed good agreement to those of isochronous stress-strain curves (ISSC) presented in ASME BPV NH. The relation can be simply obtained with only several short-term 1% strain data without ISSC which can be obtained by long-term creep data. Particularly, this relation is useful in estimating stress intensity limit for new and emerging class of high-temperature creeping materials.

• 대한안전경영과학회지
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• 제4권2호
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• pp.57-70
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• 2002

Back pain is painful for people at a lower lumber(L4/L5 or L5/S1). It is experienced as a most frequent disaster 70％ of workers have suffered from back-pain. Especially, the occurrence rate of back pain for nurses is very high. Therefore, this study investigates female nurses who worked as a part of a medical cost management team, which mainly deal with the medical insurance in a general hospital at Seoul area. These nurses had different job tasks, which used computers for 50％ of their time, so it can be treated as VDT workers. As a first step of this project, a muscle fatigue was measured for these special VDT workers. First, survey for nurses was conducted to figure out what is a real problem of them. Second, to evaluate an experimental data, a medical cost management team was chosen for subjects. Areas of measurement were 3 places that were the trapezius (TR), the medial deltoid (MD), and the erector spine muscle (ES: L4/L5). These areas are most frequently used, so they were chosen for this study. Measurements were taken before work and after work. From these measurements, it was revealed that a fatigue really comes from their main VDT task excluding natural fatigue after work, so their work environment need to be corrected.

• 산업공학
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• 제14권1호
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• pp.95-105
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• 2001

Previous work measurement methods need much time and effort of time study analysts because they have to measure required time through direct observations. In this study, we propose a method which efficiently measures standard times without involvement of human analysts using digital image processing techniques. This method consists of two main steps: motion representation step and cycle segmentation step. In motion representation step, we first detect the motion of any object distinct from its background by differencing two consecutive images separated by a constant time interval. The images thus obtained then pass through an edge detector filter. Finally, the mean values of coordinates of significant pixels of the edge image are obtained. Through these processes, the motions of the observed worker are represented by two time series data of worker location in horizontal and vertical axes. In the second step, called the cycle segmentation step, we extract the frames which have maximum or minimum coordinates in one cycle and store them in a stack, and calculate each cycle time using these frames. In this step we also consider methods on how to detect work delays due to unexpected events such as operator's escapement from the work area, or interruptions. To condude, the experimental results show that the proposed method is very cost-effective and useful for measuring time standards for various work environment.

• 한국안전학회지
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• 제16권2호
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• pp.80-84
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• 2001

Work stress and health are very important factors related to workers' condition and work safety, Author has conducted a couple of tests to check up three people's pulses before they work during their work for three types of safety guard in construction site. Work type, age, weight, sex experience year, ambient temperature n recorded as variables in this study. These are checked and asked by the author directly, before their pulse check Also, workers' Pulses were measured at height H-0 and H-9.0m to understand psychological the degree of psychological nervousness degree. POLAR protrainer NVTM HRM system(wrist recorder and sensor) was used for the site test. There are three(3) different types of construction safety guard which have been used for, this study. They are usually or frequently used and found in the site. Four different ranges of age groups(20's, 30's 40's, 50's) carpenters are assisted to the test sites with wearing pulse recorder and sensor respectively. All three types of safety guards have the same height 90㎝ even though they are different types. On top of five(5) stories tublar framed scaffolding is fabricated, similar to the one in site, where those safety guards are installed. The older(=more experienced) the workers are the more stable they are. it is shown. Also, It is verified the visually uncomfortable rail type can cause workers to psychologically be unstable.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1718-1723
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• 2003

This paper presents a computational method for deformation modes of a flexible body in multibody system from the experimental modal analysis and an efficient method for flexible multibody dynamic analysis by use of the modes. It is difficult to directly use experimental modal parameters in flexible multibody dynamic analysis. The major reasons are that there are many inconsistencies between experimental and analytical modal data and experimental noises are inherent in the experimental data. So two methods, such as, a method for ortho-normalization of experimental modes and the other one for mode expansion, are suggested to gain deformation modes of a flexible body from the experimental modal parameters. Using the virtual work principle, the equation of motion of a flexible body is derived. The effectiveness of the proposed method will be verified in the numerical example of cab vibration of a truck by comparing analysis and test results.