• Title/Summary/Keyword: Pohang Korea

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Effects of CPR Training for Healthy Life on CPR Performance Confidence to Middle School (건강한 삶을 위한 심폐소생술 교육이 심폐소생술 수행 자신감 향상에 미치는 효과)

  • Kook, Jong-Won;Park, Sang-Kyu;Park, Joung-Je;Kim, Bo-Kyun
    • Journal of Korea Entertainment Industry Association
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    • v.13 no.8
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    • pp.391-400
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    • 2019
  • In this study, we tried to find out the difference in confidence in performing Healthy Life on CPR before and after CPR education to middle school volunteers. Through the above statistical analysis process, the following findings were obtained: First, the general characteristics of the respondents who participated in this survey were higher than that of boys, followed by third, first and second graders. Second, junior high school volunteers were shown to have similar confidence (Chonbach's α=.80) and confidence (Chonbach's α=.76) before CPR education, and confidence in the degree of social contribution (Chonbach's α=7.77). Third, the Pearson Rates Correlation was performed to see the correlation between grade, gender, pre-education confidence, post-training confidence, confidence in the application of airway methods, confidence in the patient's breathing, confidence in chest compression, confidence in the use of defibrillators, and post-cardiopulmonary resuscitation education. As a result, it was confirmed that there was a significant correlation between all the spokesmen. In particular, post-training self-confidence was the highest correlation with coping confidence in case of cardiac arrest, followed by chest compressive confidence. Comparing and reviewing these findings and prior studies as shown above, we were able to establish that CPR education has an impact on the confidence performed by gender.

Suicidal Impulse caused by Stress in Korea : Focusing on mediational effects of Existent spirituality, Family Support, and Depression (한국인의 스트레스가 자살충동에 이르는 경로분석 : 실존적 영성, 가족의 지지, 우울의 매개효과를 중심으로)

  • Park, Jae Yeon;Lim, Yeon Ok;Yoon, Hyun Sook
    • Korean Journal of Social Welfare Studies
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    • v.41 no.4
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    • pp.81-105
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    • 2010
  • This study is aimed to investigate the effects of stress on suicidal impulse, considering the mediating effects of existent spirituality, family support, and depression. The data, collected from 1,000 adults were examined by the statistics software SPSS 17.0 and AMOS 17.0, in which descriptive statistics, structural equation model analysis, and multi-group simultaneous analysis are utilized. The study shows that, from the structural equation modeling, the stress has positive effects on depression and suicidal impulses, but negative effects on existent spirituality. Existent spirituality acts as a protective factor, negatively affecting the suicidal impulse. Depression has positive effects on suicidal impulse. Therefore, existent spirituality and depression have mediational effects on the relationship between stress and suicidal impulse. The results of multi-group simultaneous analysis imply that there are no age and sex differences. In conclusion, social workers need to make great efforts to exterminate stress, and treat depression at the first priority, because the depression is a major sign of suicide. As a protective factor, strengthening existent spirituality is a very effective way to prevent a suicidal impulse.

A Study on the Additional Installation of Coastal Wave Buoys in Smooth Water Areas to Prevent Marine Accidents (해양사고 예방을 위한 평수구역 내 파고부이 추가설치 검토)

  • Min-Kyoon Kang;Dong-Il Seol
    • Journal of Navigation and Port Research
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    • v.47 no.6
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    • pp.350-357
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    • 2023
  • Marine accidents frequently occur due to the unreasonable operation of ships excluded from ship departure control during marine special weather warnings within smooth water areas. Coastal wave buoys installed in smooth water areas are major reference indicators for ship departure control and can be seen as being directly connected to the safety of ships navigating smooth water areas and the coast. In this study, the location appropriateness of currently operating coastal wave buoys and additional installation in the smooth water areas were assessed by analyzing coastal marine accidents over the past 30 years (1991-2020), the main wind direction and wind speed of each major trading port, and the GICOMS ship track data in 2018. The study results showed that an additional coastal wave buoy should be installed at each of the major trading ports(Inchon Port, Pohang Port, Ulsan Port, and Busan Port) and that the location of the coastal wave buoy needs to be moved in the case of Busan Port. Based on various data analysis in this study, the suggestion for an additional installation and movement of the coastal wave buoy presented in this study is expected to contribute to improving the reliability of ship departure control and resolving safety blind spots.

Evaluation of Shear Deformation Energy and Fatigue Performance of Single-layer and Multi-layer Metal Bellows (단층 및 다층 금속 벨로우즈의 전단 변형 에너지 및 피로성능 평가)

  • Kyeong-Seok Lee;Jin-Seok Yu;Young-Soo Jeong
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.28 no.1
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    • pp.39-45
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    • 2024
  • Seismic safety of expansion joints for piping systems has been underscored by water pipe ruptures and leaks resulting from the Gyeongju and Pohang earthquakes. Metal bellows in piping systems are applied to prevent damage from earthquakes and road subsidence in soft ground. Designed with a series of corrugated segments called convolutions, metal bellows exhibit flexibility to accommodate displacements. Several studies have examined variations in convolution shapes and layers based on the intended performance to be evaluated. Nonetheless, the research on the seismic performance of complex bellows having multiple corrugation heights is limited. In this study, monotonic loading tests, cyclic loading tests, and fatigue tests were conducted to evaluate the shear performance in seismic conditions, of metal bellows with variable convolution heights. Single- and triple-layer bellows were considered for the experimentation. The results reveal that triple-layer bellows exhibit larger maximum deformation and fatigue life than single-layer bellows. However, the high stiffness of triple-layer bellows in resisting internal pressure poses certain disadvantages. The convolutions are less flexible at lower displacements and experience leakage at a rate related to the variable height of the convolutions in certain conditions. At lower deformation rates, the fatigue life is rated higher as the number of layers increase. It converges to a similar fatigue life at higher deformation rates.

A study on the design of a trumpet horn for automobiles based on acoustic reactance at the horn throat (혼 입구에서의 음향 리액턴스에 근거한 자동차용 트럼펫 혼의 설계 연구)

  • Junsu Lee;Woongji Kim;Daehyun Kim;Dongwook Yoo;Wonkyu Moon
    • The Journal of the Acoustical Society of Korea
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    • v.43 no.1
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    • pp.39-48
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    • 2024
  • A car horn serves a crucial safety role as a means of communication between drivers and a part that alerts pedestrians in advance. While previous studies have utilized finite element method and electric circuit model to simulate and analyze characteristics of the car horns, there remains a lack of research on design methods of a trumpet horn. This paper presents a design approach that predicts the operating frequency based on the acoustic reactance at the throat of the horn, once the vibrating part is determined. We deal with a horn combining both an exponential horn and a waveguide in the acoustic section, and confirm that the acoustic reactance at the horn throat measured by impedance tube experiment agrees well compared with the numerical result obtained using the finite element method. The resonance frequency of the car horn is predicted using the COMSOL Multiphysics finite element numerical analysis model, and the proposed design method is validated by measuring the operating frequency of the designed horn in a sound pressure experiment. As a result, the resonance measured in a semi-anechoic chamber environment by applying a DC voltage of 12 [V] excluding the holder occurs accurately within a few [Hz] of the design operating frequency. This paper discuss the design method of a trumpet horn from the perspective of the horn's acoustic reactance, and is expected to be useful for designing horn systems.

Mineral Content and Nutritional Evaluation of Marine Invertebrates from the Korean Coast (한국 연안산 해산 무척추동물의 미네랄 함량과 영양평가)

  • Mok, Jong-Soo;Lee, Doo-Seog;Shim, Kil-Bo;Yoon, Ho-Dong
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.2
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    • pp.93-103
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    • 2009
  • To measure the mineral contents of marine invertebrates, we collected 239 individuals from 52 species from the east (Pohang), west (Gunsan), and south (Tongyeong) coasts of Korea: 34 species of molluscan shellfish (Gastropoda and Bivalvia), 6 species of Cephalopoda, 8 species of Crustacea, and 4 other species. The mean contents of the macro mineral in the 100g edible portion of molluscan shellfish were high in the oder of Na (355.1 mg), P (128.1 mg), K (110.8 mg), Mg (83.8 mg) and Ca (57.5 mg). And the mean contents of the micro mineral in the molluscan shellfish were high in the oder of Fe ($41.12{\mu}g/g$), Zn ($30.48{\mu}g/g$), Mn ($3.81{\mu}g/g$), Cu ($3.49{\mu}g/g$) and Ni ($0.35{\mu}g/g$). We could not observe clear regional variation in the mineral content of the molluscan shellfish species. The mean contents of the macro mineral in the 100g edible portion of other marine invertebrates (Cephalopoda, Crustacea, etc.) were high in the oder of Na (400.7 mg), P (145.1 mg), K (105.0 mg), Mg (63.2 mg) and Ca (49.0 mg). And the mean contents of the micro mineral in other marine invertebrates were high in the oder of Zn ($24.4{\mu}g/g$), Fe ($13.8{\mu}g/g$), Cu ($4.88{\mu}g/g$), Mn ($2.14{\mu}g/g$) and Ni ($0.12{\mu}g/g$). The daily average intakes of the macro mineral through fisheries products consisted of P (125.9 mg), Na (119.3 mg), K (101.8 mg), Ca (31.0 mg), Mg (27.6 mg). And the daily average intakes of the micro mineral through fisheries products consisted of Zn (0.92 mg), Fe (0.68 mg), Cu (0.12 mg) and Mn (0.07 mg). The respective intakes of the minerals (P, Mg, Na, Ca, K) from fish were about 18.0, 7.9, 8.0, 4.4 and 2.2% of the dietary reference intakes for Koreans (KDRIs) set by the Korean Nutrition Society. And the respective intakes of micro mineral (Cu, Zn, Fe, Mn) from fish were about 14.6, 9.2, 6.7, and 2.1% of the dietary reference intakes for Koreans (KDRIs). Therefore, fisheries products play a very important role as a source of mineral.

A Study on Accuracy Evaluation and Accuracy Improvement in Cadastral Re-survey Surveying Method (지적재조사 측량방법의 정확도 비교 및 정확도 향상방안 연구)

  • Lee, Suk Bae;Auh, Su Chang;Suh, Yong Woon
    • Journal of Korean Society for Geospatial Information Science
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    • v.22 no.4
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    • pp.39-46
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    • 2014
  • Network RTK GNSS positioning technique which has been developed to overcome the limitation of Single reference station RTK is used widely in the field of general surveying, cadastre surveying and engineering surveying due to the high accuracy and efficiency. It is specified Network RTK, Single reference station RTK and Static of GNSS as a surveying method in the regulation of Cadastre Re-survey Surveying. In this study, Network RTK and Static GNSS surveying were accomplished at cadastral re-survey field in Hadong, Gyeongnam and the surveying results were compared. Also, to analyze the performance of site calibration in Network RTK surveying, two types of Network RTK surveying with and without site calibration were accomplished and the results was compared. The research result shows that average positioning error between Network RTK(VRS) without site calibration and Static surveying result is 2.44cm and 1.53cm respectively and average positioning error between Network RTK(VRS) with site calibration and Static surveying result is 0.19cm and 0.82cm respectively at two zone. So, it was proved the effect of calibration in network RTK(VRS) surveying.

Automatic Extraction of Eye and Mouth Fields from Face Images using MultiLayer Perceptrons and Eigenfeatures (고유특징과 다층 신경망을 이용한 얼굴 영상에서의 눈과 입 영역 자동 추출)

  • Ryu, Yeon-Sik;O, Se-Yeong
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.37 no.2
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    • pp.31-43
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    • 2000
  • This paper presents a novel algorithm lot extraction of the eye and mouth fields (facial features) from 2D gray level face images. First of all, it has been found that Eigenfeatures, derived from the eigenvalues and the eigenvectors of the binary edge data set constructed from the eye and mouth fields are very good features to locate these fields. The Eigenfeatures, extracted from the positive and negative training samples for the facial features, ate used to train a MultiLayer Perceptron(MLP) whose output indicates the degree to which a particular image window contains the eye or the mouth within itself. Second, to ensure robustness, the ensemble network consisting of multiple MLPs is used instead of a single MLP. The output of the ensemble network becomes the average of the multiple locations of the field each found by the constituent MLPs. Finally, in order to reduce the computation time, we extracted the coarse search region lot eyes and mouth by using prior information on face images. The advantages of the proposed approach includes that only a small number of frontal faces are sufficient to train the nets and furthermore, lends themselves to good generalization to non-frontal poses and even to other people's faces. It was also experimentally verified that the proposed algorithm is robust against slight variations of facial size and pose due to the generalization characteristics of neural networks.

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Eggs Development and Morphology of Larvae of the Flounder, Limanda herzensteini (참가자미(Limanda herzensteini)의 난발생과정(卵發生過程)과 자어(仔漁)의 형태발달(形態發達))

  • Han, Kyeong-Ho;Kim, Yong-Uk
    • Korean Journal of Ichthyology
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    • v.11 no.1
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    • pp.86-93
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    • 1999
  • Artificial fertilization of flounder, Limanda herzensteini caught at Pohang brook was performed in April 13, 1995 and hatched larvae were reared for 25 days to describe the development of eggs and the morphogenesis of larvae. The fertilized egg was buoyant, colorless and spherical in shape, measuring 0.86~0.96 mm in diameter (mean: 0.90 mm), The egg has no oil globule, and its perivitelline space was narrow. Hatching in the indoor tank with $16.0^{\circ}C$ in mean water temperature started from the 64 hours after fertilization. The newly hatched larva, measuring about 2.80 mm in total length, had 10~11+25~27=35~38 myomeres. The anus is open at about the anterior point of the body. The 3 to 4 days old larva was 3.90 mm in total length. In this larva the eyes were black and the mouth was open. The yolk was consumed in 8 to 9 days. In 20 to 22 days after hatching, the larvae grew 6.1 mm in total length. The eyes were located symmetry on both sides of head.

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The Direction of School Forest Plans Considering Satisfaction of Elementary Students (초등학생들의 만족 유형을 고려한 학교숲 조성방향)

  • Jang, Cheol-Kyu;Jung, Sung-Gwan;Jang, Jung-Sun;Kim, Kyung-Tae;Oh, Jeong-Hak
    • Journal of the Korean Institute of Landscape Architecture
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    • v.37 no.4
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    • pp.42-51
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    • 2009
  • The purpose of this study is to analyze the actual conditions of school forests using a field survey and to establish the construction methods considering satisfactions of students using a satisfaction inquiry. The results of the this study are as follows: many trees had the highest score whereas reduction of noise had the lowest score in the satisfaction analysis of 15 items. According to the result of the factor analysis, 3 factors were determined to be most important from 15 items of satisfaction, and they were Environmental Function, Educational and Recreational Function, and Ecological Function. Next, students were classified into 4 groups using factor scores by cluster analysis. Group I had very high effectiveness in the Environmental Function and group II had low effectiveness in all factors. Also, group III had very high effectiveness in the Educational and Recreational Function, and group IV had very high effectiveness in the Ecological Function. According to the analysis results of the character of the school on students' group, the satisfaction of school forests was high when students of group II were few and other group's students were similar. As these schools use a lot of parts of the playground for green space, there was more school forest than at other schools. Also, students of these schools were experiencing the school forest through educational programs. Therefore, school forests should be constructed by increasing the green area and considering the satisfaction factors of students through various experience and education programs and by the way utilizing wide space than adding the tree in the garden.