• Title/Summary/Keyword: problem analysis

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A Development of Career Aptitude Scale for Design Majoring University Students (디자인 진로적성검사의 개발)

  • Gil, Im-Joo;Yang, Sung-Yong
    • Archives of design research
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    • v.19 no.1 s.63
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    • pp.283-292
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    • 2006
  • This study developed 'Design Career Aptitude Scale' to help design majoring college students who are seeking their career goals or conflicting to decide their majors. The subscales of the 'Design Career Aptitude Scale' are 'basic job competency', 'basic design competency' and' advanced design competency'. This study further classified the 'basic job competency' and 'basic design competency' into several subareas and defined each concepts. Based upon the classification of each subareas, tentative test items were developed through the verification of validity three times by seven design professionals. A pilot study of the developed scale was administered to 506 design majoring college students. The results by exploratory factor analysis were that the basic job competency was composed of four factors; ability of interpersonal relations, goal-driven ability, problem solving ability and self-developing ability. The basic design competency was composed of five factor, grounding in design, computer skills, material sensitivity, formative ability and color sensitivity. The results can be seen as an adequate, delicate factor structure to represent design aptitude, and also the scale can be a useful tool to the students who are conflicting to decide their majors and careers. The further study needed to validate the scale through the investigation of the relationship with related scales measuring designing ability, and with other criteria-referenced group.

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A Case Study on the Boring-Hole Blasting for Offering of the Ground Vibration Source (지진동 Source 제공을 위한 심부 시추공발파 기술사례)

  • 조영곤;김희도;조준호
    • Tunnel and Underground Space
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    • v.13 no.3
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    • pp.187-195
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    • 2003
  • This case study which is to make 2-Dimension earth's crust structures clearly is about the great boring-hole blasting to provide ground vibration source of the reflected wave research on the Korean Peninsula earth's crust structures research. For this study we've done blasting twice-500 ㎏/charge per delay, 1,000 ㎏/charge per delay, and the specifications of blasting are the following - dia.: 300 ㎜, boring-depth : 100m, besides, we used the explosives and electric detonators which have sufficient detonating velocity and very excellent safety, capacity of detonating, accurate delay time. We charged explosives into steel pipe with bulk type to avoid dead pressure by ground water. And then we tested about pipe airtight and blasting to certificate which has no problem by using on this study. In the results, we succeeded each blasting in Seosan, Youngdong. For the Peak Sum Vector(PSV) around the blasting at the main points, its real measured PSV is higher 180 % than estimated PSV with USBM. In this study we can't to be analysis of vibration velocity, but to be key providing vibration source.

THE EFFECT OF GROWTH FACTORS IN PLATELET-RICH PLASMA ON THE ACTIVITY OF OSTEOBLAST CELL LINE (혈소판농축혈장 내의 성장요소가 조골세포주의 활성도에 미치는 영향)

  • Jung Tae-Wook;Kim Yung-Soo;Kim Chang-Whe;Jang Kyung-Soo;Lim Young-Jun
    • The Journal of Korean Academy of Prosthodontics
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    • v.42 no.2
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    • pp.175-191
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    • 2004
  • Statement of problem: Platelet-rich plasma(PRP) is well known to be very effective method to stimulate and accelerate the healing of bone and soft tissue. However, there are few reports which deal with the mechanisms of the PRP on the activation of the osteoblasts. Purpose: This study was aimed to investigate the effect of growth factors in PRP on the activity of osteoblasts. Material and method: To evaluate the effect on human, human osteoblast cell line was cultured. PRP was extracted from the blood of a healthy volunteer. Using the recombinant growth factors of PDGF, $TGFT-\beta$, IGF-1, bFGF which are mainly found at bone matrix and their neutralizing antibody, the effect of PRP on the attachment and proliferation of osteoblasts was evaluated. To evaluate the autocrine and paracrine effects, conditioned media(CM) of PRP was made and compared with PRP. By the western blot analysis, the expression of growth factors in PRP, CM was examined. Cell morphology was compared by the light microscope. Results : 1) The effects of CM on osteoblast were similar to the effects of PRP. 2) PRP, CM, recombinant $TGF-\beta$, bFGF, IGF-1 showed significantly higher cellular attachment than control(p<0.05) in the cell attachment assay. In the cell proliferation assay, PRP, CM, recombinant $TGF-\beta$, IGF-1, bFGF, PDGF increased significantly cell proliferation(p<0.01). Among the recombinant growth factors, IGF-1 showed the highest cellular attachment and proliferation. 3) In the western blot assay, bFGF, IGF-1, PDGF weve equally expressed in PRP and CM. 4) The attachment of osteoblast cell decreased significantly after the addition of neutralizing antibody against $TGF-\beta$, IGF-1(p<0.05). In the cell proliferation assay, the addition of neutralizing antibody against $TGF-\beta$, bFGF, PDGF, IGF-1 decreased significantly the cellular proliferation(p<0.05). The amount of decreasing in the cell attachment and proliferation is the highest in at-lGF-1. 5) The cells in control group were flattened and elongated with a few cellular processes in the a light microscope. But, the cells appeared as spherical, plump cells with well developed cellular processes in experimental groups. The cells in PRP and CM had more prominent developed features than recombinant growth factor groups. Conclusions : These findings imply that PRP maximize the cellular activity in early healing period using the synergistic effect, autocrine, paracrine effects of growth factors and increase the rate and degree of bone formation.

The Hope of the Stroke Patients (뇌졸중환자의 희망)

  • 김이순
    • Journal of Korean Academy of Nursing
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    • v.27 no.1
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    • pp.212-227
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    • 1997
  • Cerebrovascular diseases in Korea is an important health problem since mortality and mobidity have been increased rapidly. It marked the 2nd cause of specific death rates in 1993. The stroke causes physical function disorder due to hemiparalysis and emotional disorder, and stroke patients experience helplessness, powerlessness. sense of alienation and loss of hope. These feelings make the rehabilitation difficult because they lose the will of life. The subjects of the study were seven citizens who live in Pusan, are over 50 years old and belong to low income-level. The data were collected from Jan. to Sep. 1995. The researcher as a caregiver and volunteer made confidence of them and asked for their agreement on the purpose of the study. The subjects expressed their experience as openheartedly as possible. The analysis of the data was made through the phenomenological analytic method suggested by Giorgi, which is as follows ; as an unit of description which include the subject' expressions and the researcher's observation, it is examined the theme that express the hope experience with the subject's language(underlining), and the focal meanings are identified. The focal meaning is the crystalization of the theme, which is written in the language of the researcher. After intergrating the focal meaning and make the situated structural description as the meaning of the hope experience identified on each subject's point. After intergrating the situated structural description and make the general structural description as the meaning of the hope experience identified on total subject's point then the systemizing of the structure of the hope experienced phenomena and the flowing of the conciousness was researched. The conclusions of this study was as follows : The ten sources of hope which the subjects experienced were sorted as under 〈mutual relations to others : spouse, children, relatives, fellow believer. health professioner. associate patient group〉, 〈spiritual dependence〉. 〈recovery of physical function〉. 〈rumination of the past life〉, 〈expectation of the future〉. 〈economic power〉, 〈belief〉, 〈ability〉. 〈spontaneous participation〉 and 〈recovery of roles〉. Their hope was spoken out by the following two kinds of linguistics. First. the hope was expressed in the affirmative expression as follows : 〈 to be dependable〉, 〈to make efforts〉, 〈to keep under control〉, 〈to desire〉, 〈to be pleasant〉, 〈to be peaceful〉, 〈to be grateful〉, 〈to give help〉, 〈self-confidence. Courage〉, 〈to be happy〉, 〈to satisfy oneself〉, 〈to share with others〉, 〈to understand〉 and 〈to be affected, be impressed〉 Second, the hope was expressed in the negative on pression as under : 〈to be distressed〉, 〈to be uneasy〉, 〈to be sorry, be unsatisfied〉 〈despair〉, 〈to abandon〉, 〈to be fearful〉, 〈to suffer〉, 〈to bear a burden〉 〈to be confused〉, 〈to be solitary〉, 〈chest trouble〉, 〈to feel heavy〉 〈grief〉, 〈to be daunted〉, 〈to get angry〉, 〈to be uncomfortable〉, 〈to have something regretable〉 and 〈to feel guilty〉. And their hope was expressed by the following four behavioral expressions : 〈physical sphere〉, 〈psychological sphere〉, 〈social support sphere〉 and 〈spiritual sphere〉. The reaction patterns of their hope experience appeared in the following 4 coping method : 〈conquest type〉, 〈dependence type〉, 〈adaptation type〉 and 〈fate type〉. Finally, in the hope structure the sense of certainty don't always coexict with the sense of uncertainty, When the stroke patients try to search for the best quality of life, the senses of certainty and uncertainty make a continual cyclic system in the hope structure.

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Relationship between Problematic Drinking Behavior and the Personalities of High School Students (고등학생의 음주문제행동과 성격특성)

  • Cho, Won-Jung;Kim, Gwang-Suk;Seo, Ku-Min;Kwon, In-Sook
    • Research in Community and Public Health Nursing
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    • v.15 no.3
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    • pp.471-482
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    • 2004
  • Purpose: This study intended to identify personality factors and related problematic behaviors of adolescents who drink alcohol in order to provide basic data for developing nursing programs. Methods: The data were collected from October to December 2002 from 1.080 high school students in Seoul. The Revised Cloninger's Tri-dimensional Personality Questionnaire (TPQ) was used to measure their personalities. The alcohol expectancy was measured using the tool revised by Cho (1999) and stress levels were measure using a stress tool revised Cho (1998). The data were analyzed with SPSS Windows using Chi square test. independent t-test. and logistic regression analysis. Results: 1. The percentage of fathers who drank was 79.8%. mothers. 54.3%. and friends. 54.3%. The alcohol expectancy averaged 6.36 while the stress levels were 132.79. 2. It was found that there are significant differences (p<.001) in problematic drinking behaviors according to the following variables: second year high school students among all grade variables, more monthly pocket money for the amount of money variables, the group of students who smoked in the case of the variable related to smoking, spending more time using the Internet for the Internet use variable, and having friends who drink 65.6% for the friend variable. The alcohol expectancy scale of those students who showed problematic drinking behaviors was higher than that of those who did not. There are four family-related stress subscales, and there was a significant difference among them (p<.05). Among the personal characteristics, the group who displayed problematic drinking behaviors seeks new experiences and reward dependence more than the group who did not exhibit those behaviors, and there were significant differences between the two groups (p<.001). 3. When the socio-demographic and drinking-related factors were controlled, the tendency of seeking new experiences increased the risk of problematic behaviors 1.07 times (p<.05). Compared to the non smoking group, the smoking group was found to have a 5.06 time (p<.001) greater risk of displaying problematic drinking behaviors. In comparison with the non drinking group, the drinking group was also found to have a 5.31 time (p<.001) greater risk of exhibiting problematic drinking behaviors. The group with high alcohol expectancy scores was significantly different from the group with the no alcohol expectancy, showing a 1.26 time (p<.00l) greater risk of problematic drinking behaviors. Conclusions: Based on these results, the problematic drinking behaviors were connected with alcohol expectancies, friends and personality types. Therefore, we should develop an alcoholic prevention program for adolescence considering the above results.

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The Experience of the Stroke Patients about the Use of Oriental Medicine (뇌졸중 환자의 한방의료 이용 경험)

  • Kim Lee Sun
    • Journal of Korean Public Health Nursing
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    • v.11 no.1
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    • pp.82-92
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    • 1997
  • Cerebrovascular diseases in Korea is an important health problem since mortality and mobidity have been increased rapidly. It marked the 2nd cause of specific death rates in 1993. The subjects of the study were seventeen citizens who are using to the Oriental Medicine. The data were collected from Apr. to Oct. 1996. The researcher as a caregiver and volunteer made confidence of them and asked for their agreement on the purpose of the study. The subjects expressed their experience as openheartedly as possible. The researcher described closely the experiences of using to the Oriental Medicine with there words themselves and under the observation of the reseacher. A tape-recorder was used under the permission of the subjects to prevent the leakage of the spoken information and communication. The analysis of the data was made through the phenomenological analytic method suggested by Van Kaam, which is as follows; as an unit of description which include the subject' expressions and the researcher's observation. The conclusions of this study was as follows : one hundred eighteen descriptive expression found and they were grouped eighteen common factors. These are ${\ulcorner$to effect needle${\lrcorner}$ ${\ulcorner$to effect Chinese medicine${\lrcorner}$ ${\ulcorner$treatment method${\lrcorner}$ ${\ulcorner$attitude of herb doctor${\lrcorner}$ ${\ulcorner$recommendation of family and other person${\lrcorner}$ ${\ulcorner$what one sold to${\lrcorner}$ ${\ulcorner$traditional custom${\lrcorner}$ ${\ulcorner$experience of the past use${\lrcorner}$ ${\ulcorner$to be desolate${\lrcorner}$ ${\ulcorner$negative recognition${\lrcorner}$ ${\ulcorner$Ineffective drug${\lrcorner}$ ${\ulcorner$Unfaithful of doctor${\lrcorner}$ ${\ulcorner$positive recognition${\lrcorner}$ ${\ulcorner$Oriental medical hospital surroundings${\lrcorner}$ ${\ulcorner$to build up one's health${\lrcorner}$ ${\ulcorner$to be clear blood${\lrcorner}$ ${\ulcorner$economic burden${\lrcorner}$ ${\ulcorner$deficit of profession${\lrcorner}$ Finally. eighteen common factors were grouped under six highter categories. These are ${\ulcorner$Belief to oriental medicine${\lrcorner}$ ${\ulcorner$motivation of use${\lrcorner}$ ${\ulcorner$distrust to western medicine${\lrcorner}$ ${\ulcorner$stability of emotion${\lrcorner}$ ${\ulcorner$Alteration of positive physical function${\lrcorner}$.

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Convergence Study on the Development and Material Property of Wax for Surface Conservation of Iron Alloy Outdoor Sculpture (야외 철제 조각 작품 표면 보존용 왁스의 개발 및 재료 특성에 관한 융합 연구)

  • Oh, Seung-Jun;Wi, Koang-Chul
    • Journal of the Korea Convergence Society
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    • v.9 no.4
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    • pp.151-160
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    • 2018
  • Waxes currently used as a coating material to preserve surfaces of outdoor iron sculptures tend to face lower coating strength and efflorescence due to the aging from air pollution and acid rains. Consequently, they are subjected to repeated corrosions shortly after the treatment. And the sculptures face the problem losing their original nature because of the changes of colors and lusters, so this convergence study aims at developing wax with better performance than the existing materials. For this reason, the study identified the effects of physical property using the environmental experiments such as the tests of salt spray and gas corrosion as well as the analysis of luster level and thermo-gravimetry. As this study result, the developed ISC wax showed the excellent blocking effect from salt water and coating durability more than five times compared with the existing waxes, better acid resistance by two-four times, sun block effect by 2-10 times, improved luster variance by 3-16 times, improved thermo-stability and durability by 0.5-5 times, and therefore demonstrating far better coating effect than the existing waxes. In the light of these findings, this study contributes for this new development which can replace the existing waxes used so far in order to preserve the outdoor iron sculptures.

Fabrication of Photocatalytic TiO2 thin Film Using Aerosol Deposition Method and its Filtration Characteristics (에어로졸 증착법을 이용한 광촉매 TiO2 박막 제조 및 박막의 여과 특성)

  • Choi, Wonyoul;Lee, Jinwoo;Kim, Shijun;Kim, Jongoh
    • Journal of the Korean GEO-environmental Society
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    • v.11 no.1
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    • pp.5-11
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    • 2010
  • The objective of this study is to evaluate the effect of operational parameters such as rotation speed and vibrating milling time for the fabrication of photocatalytic $TiO_2$ thin film using aerosol deposition methods. $TiO_2$ powders produced in the range of 1,000-3,000 rpm of rotation speed of centrifugal separator are ineffective on the fabrication of $TiO_2$ thin film by aerosol deposition due to the problem of nozzle powder jam. $TiO_2$ powders controlled by vibrating milling had about 420 nm of average diameter after 2 hr of vibrating milling time. The result of XRD analysis indicated that $TiO_2$ powders had a anatase phase. Vibrating milling methods was considered to be an effective pre-treatment process for $TiO_2$ powder control. Consequently $TiO_2$ photocatalytic thin film with dispersion of anatase crystallites controled by vibrating milling was successfully fabricated by aerosol deposition. The permeation flux of $TiO_2$ photocatalytic thin film with the immobilized $TiO_2$ powder was higher than that of suspended $TiO_2$ powder. Therefore, $TiO_2$ photocatalytic thin film promises to be one of the effective methods for enhancing filtration performance for the treatment of organic pollutants.

Slope Stability Analysis by Slice Method and Finite Difference Method- A Comparative Study - (절편법과 유한차분법에 의한 사면안정해석 비교연구)

  • 박연준;채영수;유광호;백영식
    • Journal of the Korean Geotechnical Society
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    • v.15 no.6
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    • pp.263-272
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    • 1999
  • Slice method is commonly used in solving slope stability problems since it is easy to use and its computation time is rather short. But depending upon the assumptions on the inter-slice forces, different methods are available. Quite often the difference between methods are so big that it is very difficult to make engineering decisions. This paper describes a method to calculate the factor of safety of a slope using FLAC, a finite difference based program. A FISH routine is developed to calculate the factor of safety, and verified by comparing with Chen's limit equilibrium solution. An example problem was selected from Fredlund and Krhan's paper, and results were compared for different soil and water conditions. The difference was less than 0.01 when the soil is homogeneous, and less than 5 % when a weak layer is embedded. Since most geotechnical application programs are capable of considering complicated ground conditions as well as the effect of ground supports, numerical methods are believed to be very useful in making engineering decisions. The developed routine can be applied to the calculation of the factor of safety of jointed rock slopes or weathered rock slopes where the use of slice method is limited.

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Feasibility Analysis of Wasted Limestone Powder as a Viscosity Reducing Material for Cement Based Materials (시멘트 계열 재료의 점도 저하용 혼화재료로서 폐석회석 미분말의 사용 가능성 분석)

  • Lee, Hyang-Seon;Jeon, Jong-Un;Son, Bae-Geun;Han, Dongyeop
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.6 no.2
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    • pp.123-129
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    • 2018
  • The aim of the research is providing a fundamental idea of reducing viscosity of cement based materials by replacing powder based material. With developing concrete technology, high performance concrete with high solid volume fraction has been used widely. Under the conditions of the high solid volume fraction due to the low w/c and replacement of SCMs, decreased fluidity is one of the critical problem, and thus plasticizer has been used to improve fluidity of the mixture. However, in rheological aspect, the fluidity of cement based materials can be defined with yield stress and viscosity, and using plasticizer only decreases yield stress without least controlling on viscosity. Therefore, based on the idea of Krieger-Dougherty model, a feasibility of wasted limestone powder from cement manufacturing process was used to decrease the viscosity of the mixture by replacing cement powder. According to a series of experiment, by replacing wasted limestone powder solely, there was a possibility of reducing viscosity was observed. Thus, in this research scope, it is considered to contribute on providing a fundamental idea of reducing viscosity with powder replacement and it is expected to contribute on further research using various conditions of replacing powders for reducing viscosity of cementitious materials.