• 정보통신설비학회논문지
• /
• 제10권2호
• /
• pp.74-79
• /
• 2011

The goal of this research is to reduce dynamic and static power consumption for a low power cache system. The proposed cache can achieve a low power consumption by using a drowsy and a way prediction mechanism. For reducing the static power, the drowsy technique is used at 4-way set associative cache. And for reducing the dynamic energy, one among four ways is selectively accessed on the basis of information in the Way-Line Prediction Unit (WLPU). This prediction mechanism does not introduce any additional delay though prediction misses are occurred. The WLPU can effectively reduce the performance overhead of the conventional drowsy caching by waking only a drowsy cache line and one way in advance. Our results show that the proposed cache can reduce the power consumption by about 40% compared with the 4-way drowsy cache.

• 한국조경학회:학술대회논문집
• /
• 한국조경학회 2007년도 Journal of Landscape Architecture in Asia Vol.3
• /
• pp.84-88
• /
• 2007

When people recognize a landscape, they first need to see it for a definite period time. This study clarified the way green space in a landscape is recognized using eye movement analysis, and evaluated the Pffi9bility for quantifying stress-reducing effects of seeing a landscape. The results of the experiments on eye movement analysis suggest that the way of recognizing green space in a landscape may depend on a ratio of the amount of scenic greenery in a landscape, color and greenery layout. Especially, this study also suggests that the possibility of the greenery layout guiding eye movement could be verified by conducting a study on planting patterns. In addition, the results of the experiments for quantifying stress-reducing substances found that it is likely that a green space in an urban area has stress-reducing effects.

• 대한기계학회논문집A
• /
• 제35권11호
• /
• pp.1477-1482
• /
• 2011

기어열의 입력축이나 출력축에 원웨이클러치를 설치하면 기어열의 진동을 효과적으로 감소 시킬 수 있다고 보고된 바 있으나, 아직까지 수치적 해석만이 행하여졌고 실험에 의한 검증이 이루어지지 않았다. 따라서 본 연구에서는 원웨이클러치를 가지는 기어열을 대상으로 동특성 실험을 수행하여, 원웨이클러치가 진동 감소에 효과적인지 여부의 타당성을 검증하였다. 클러치 설치 유무와 설치 위치에 따른 차이를 비교하기 위하여, 입력축과 출력축에 각각 클러치 설치 조건을 달리하면서 넓은 속도 범위에 걸쳐서 동특성을 측정 비교하였다. 실험 결과에 의해, 클러치가 기어물림 진동뿐만 아니라 입력축에서 전달되는 진동을 감소 시킴으로써, 기어열의 비틀림 진동 감소에 효과적임을 확인하였다.

• 한국직업건강간호학회지
• /
• 제28권2호
• /
• pp.114-123
• /
• 2019

Purpose: The aims of this study were to identify the effects of caring burden and the way of coping on burnout in caregivers of cancer patients. Methods: One-hundred and forty family caregivers of cancer patients who visited the cancer center at one tertiary hospital in metropolitan city B were included. The data collection was conducted from August 1st to October 1st, 2018, using a structured, self-reported questionnaire. The collected data were analyzed using descriptive statistics, t-test, one-way ANOVA, Pearson correlation coefficients, and multiple regression. Results: In the multiple regression analysis, the subject's gender (${\beta}=.12$, p=.028) and caring burden (${\beta}=.74$, p<.001) had a significant effect on burnout. The explanatory power of the subject's gender, education level, religion, caring time, number of family caregivers, monthly income, economic burden, expectation for treatment, caring burden, the way of aggressive coping, and the way of passive coping with burnout was 63.8% (F=23.28, p<.001). Conclusion: Reducing the caring burden in family caregivers of cancer patients will ultimately contribute to reducing burnout, thereby contributing to an improvement in the psychological well-being and quality of life of family members, as well as positively contributing to the recovery of patients.

• 대한지역사회영양학회지
• /
• 제19권6호
• /
• pp.558-567
• /
• 2014

Objectives: The purpose of this study was to investigate recognition, dietary attitude and education needs for reducing sodium intakes of dietitian at customized home visiting health service (CHVHS). Methods: The subjects were 75 dietitian at CHVHS. We investigated several variables (recognition, dietary attitude, education needs for reducing sodium intakes) and determined sodium intakes level of subjects as 'low', 'middle' and 'high' by Dish Frequency Questionnaire 25 (DFQ 25). Also, we assessed the differences in recognition, dietary attitude, sodium intake level and education needs by dietitian career period (under 3 yrs vs. over 3 yrs) at CHVHS. Results: In recognition related reducing sodium intake, they showed 'checking a sodium content in nutrition labeling' score 2.5/4.0 and 'perception difference between sodium and salt' score 3.1/4.0. There was no difference in the recognition between under 3yrs' group and over 3yrs' group. In dietary attitude related reducing sodium intake, they showed 'palatability for salty taste' score 0.8/1.0, 'attitude in related soups' 0.7/1.0, 'attitude in related using natural spice' 0.6/1.0. There was a difference in 'attitude in related soups' between under 3yrs' group and over 3yrs' group (0.6 vs. 0.7). In sodium intake level by DFQ 25, they showed 'low group' 41.3%, 'middle group' 41.3% and 'high group' 17.3%. There was no difference in the distribution of sodium intake level by the career. In education needs related reducing sodium intakes, there were 'teaching experience' 93.3%, 'have a difficulty in teaching about reducing sodium intakes' 86.6%, and 'necessity of education for CHVHS dietitians' 100.0%. 'Needed education contents for CHVHS dietitians' were ranked as 'cooking way to reduce sodium intake' 58.7%, 'relation between hypertension and sodium' 17.3%, 'composing way to reduce sodium intake' 17.3%. There was a difference in needed education contents 'relationship between hypertension and sodium' (33.3% vs. 2.6%) and 'The cooking way to reduce sodium intake' (38.9% vs. 76.9%) by the career. Conclusions: The results suggested that a capacity training program for reducing sodium intake may be needed for dietitians at CHVHS to improve health of the community elderly. For effective training program related reducing sodium intake for dietitians at CHVHS, it may be necessary to consider the career period as dietitians at CHVHS.

• 한국가스학회지
• /
• 제19권6호
• /
• pp.110-115
• /
• 2015

본 논문에서는 현재 입자상물질 저감장치인 DPF의 문제를 해소하기 위하여 제안된 것으로서, 단일채널내의 배기가스 통로를 양방향 제어하여 연소시 발생되는 배기가스를 효율적으로 정화한다. 1개의 DPF장치를 장착하고 회전형 밸브를 교번제어 하여 DPF 내부에 입자상물질 적층현상으로 인한 배기가스의 내부압력 증가를 피할수 있고, 출력저하 및 연비효율이 떨어지는 등의 문제를 획기적으로 개선하여 고효율의 출력을 유도할 수 있는 입자상물질 정화시스템을 개발한다.

• Journal of Mechanical Science and Technology
• /
• 제20권7호
• /
• pp.941-949
• /
• 2006

Nonlinear behavior analysis was used to verify whether a one-way clutch is effective for reducing the torsional vibration of a paired spur gear system under periodic excitation. The dynamic responses were studied over a wide frequency range by speed sweeping to check the nonlinear behavior using numerical integration. The gear system with a one-way clutch showed typical nonlinear behavior. The oscillating component of the dynamic transmission error was reduced over the entire frequency range compared to a system without a one-way clutch. The one-way clutch also eliminated unsteady continuous jump phenomena over multiple solution bands, and prevented double-side contact, even with very small backlash. Installing a one-way clutch on both sides of the gear system was more effective at mitigating the negative effects of external periodic excitation and various parameter changes than a conventional gear system without a one-way clutch.

• 월간포장계
• /
• 통권277호
• /
• pp.72-75
• /
• 2016

• 월간포장계
• /
• 통권278호
• /
• pp.83-87
• /
• 2016

• Advances in concrete construction
• /
• 제11권4호
• /
• pp.271-284
• /
• 2021

This study aims to trace the response of twelve one-way sustainable concrete hollow-core slabs made by reducing cement content and using replacement of coarse aggregate by plastic aggregate. The trial mixes comprise the 25, 50, 75, and 100% replacement of natural coarse aggregate. The compressive strength of the resulting lightweight concrete with full replacement of coarse aggregate by plastic aggregate was 28 MPa. These slabs are considered to have a reduced dead weight due to using lightweight aggregate and due to reducing cross-section through using voids. The samples are tested under two verticals line loads. Several parameters are varied in this study such as; nature of coarse aggregate (natural or recycled), slab line load location, the shape of the core, core diameter, flexural reinforcement ratio, and thickness of the slab. Strain gauges are used in the present study to measure the strain of steel in each slab. The test samples were fourteen one-way reinforced concrete slabs. The slab's dimensions are (1000 mm), (600 mm), (200 mm), (length, width, and thickness). The change in the shape of the core from circular to square and the use of (100 mm) side length led to reducing the weight by about (46%). The cracking and ultimate strength is reduced by about (5%-6%) respectively. With similar values of deflection. The mode of failure will remain flexural. It is recognized that when the thickness of the slab changed from (200 mm to 175 mm) the result shows a reduction in cracking and ultimate strength by about (6% and 7%) respectively.