• 제목/요약/키워드: PM collection

검색결과 431건 처리시간 0.023초

단일 채널 DPF의 PM 포집 모델링 및 모델 파라미터의 민감도 해석 (Rigorous Modeling of Single Channel DPF Filtration and Sensitivity Analysis of Important Model Parameters)

  • 정승채;박종선;윤웅섭
    • 한국자동차공학회논문집
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    • 제14권6호
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    • pp.127-136
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    • 2006
  • Prediction of diesel particulate filtration is typically made by virtue of modeling of particulate matter(PM) collection. The model is closed with filtration parameters reflecting all small scale phenomena associated with PM trapping, and these parameters are to be traced back by inversely analyzing large-scale empirical data-the pressure drop histories. Included are soot cake permeability, soot cake density, soot density in the porous filter wall, and percolation constant. In the present study, a series of single channel DPF experiment is conducted, pressure histories are inversely analyzed, and the essential filtration parameters are deducted by DPF filtration model formulated with non-linear description of soot cake regression. Sensitivity analyses of model parameters are also made. Results showed that filtration transients are significantly altered by the extent of percolation constant, and the soot density in the porous filter wall is controlling the filtration qualities in deep-bed filtration regime. In addition, effect of soot particle size on filtration quality is distinct in a period of soot cake regime.

농촌 지역 노인의 기능적 의료정보 이해능력 실태와 영향요인 (Influencing Factors on Functional Health Literacy among the Rural Elderly)

  • 박지연;전경자
    • 지역사회간호학회지
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    • 제22권1호
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    • pp.75-85
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    • 2011
  • Purpose: The purpose of this study was to describe the status of the functional health literacy of the elderly living in a rural community and to identify the influencing factors on the functional health literacy. Methods: Subjects(n=238) aged over 60 years were selected for data collection. Functional health literacy was measured by Korean Health Literacy, which consisted of 15 items including eight numeracy and seven comprehension items. Descriptive statistics, t-test, ANOVA with Scheffe test, and stepwise multiple regression were used to analyze the data. Results: The mean score of total functional health literacy was $6.66{\pm}3.31$, numeracy was $3.52{\pm}1.76$, and comprehension was $3.41{\pm}2.10$. Of the subjects, 39.1% showed a low score below the median split. In the results of stepwise multiple regression, the factors affecting functional health literacy were basic literacy, age, number of chronic diseases, self-reported health status, and gender. These factors accounted for 33.0% of functional health literacy. Conclusion: These results suggest that interventions for improving functional health literacy are necessary to enhance elders' ability of self-care management. In addition, it is needed to take into account the individual characteristics of the subjects depending on their gender, age, and health status.

유방암 환자의 수술 후 심리사회적 적응, 부부친밀도 및 가족지지 (Psychosocial Adjustment, Marital Intimacy and Family Support of Post-mastectomy Patients)

  • 조옥희;유양숙
    • 종양간호연구
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    • 제9권2호
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    • pp.129-135
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    • 2009
  • Purpose: This study was to explore the psychosocial adjustment, marital intimacy and family support of post-mastectomy patients. Methods: The subjects were 90 post-mastectomy patients (stage I or II) who were eligible and agreed to participate in the study. The data collection period was from March to May, 2008. Subjects completed a survey including demographics, psychosocial adjustment scale by Lee (a 4-point Likert scale), marital intimacy scale by Kim (a 4-point Likert scale), and family support by Shim (a 5-point Likert scale). Data were analyzed using SAS (ver 9.0) program and frequency, mean (SD), t-test, ANOVA and Pearson correlation coefficients were used. Results: The mean scores of the psychosocial adjustment and marital intimacy were 2.8 (${\pm}0.4$) and 2.5 (${\pm}0.5$). Also, the mean score of the family support was 3.6 (${\pm}0.7$). Regarding the correlation between the psychosocial adjustment, marital intimacy and family support, there was a positive correlation. Conclusion: These results showed that subjects who had higher marital intimacy and family support showed better in psychosocial adjustment. To improve psychosocial adjustment of post-mastectomy patients for breast cancer more effectively, there is an necessity to provide various strategic supports and intervention for effective communication with spouse and family.

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Evaluation of JC and Cytomegalo Viruses in Glioblastoma Tissue

  • Afshar, Reza Malekpour;Mollaei, Hamid Reza;Zandi, Bahare;Iranpour, Maryam
    • Asian Pacific Journal of Cancer Prevention
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    • 제17권11호
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    • pp.4907-4911
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    • 2016
  • Glioblastoma multiforme (GBM) is the most aggressive of the gliomas, a collection of tumors arising from glia in the central nervous system. Possible associations between the human cytomegalovirus (HCMV) and the JC virus with GBM are now attracting interest. Our present aim was to investigate the prevalence of the two viruses in Iranian patients from Kerman's cities in the south of Iran. In addition, the expression rates of pp65, large T antigen and p53 proteins were assessed and their relation with GBM evaluated using reverse transcription real time PCR (rReal Time PCR). A total of 199 patients with GBM cancer were enrolled, with $mean{\pm}SD$ ages of $50.0{\pm}19.5$ and $50.7{\pm}19.6$ years for males and females, respectively. The P53 rate was dramatically low suggesting an aetiological role,. Large T antigen expression was found in JC positive samples, while the PP65 antigen was observed in patients positive for CMV and JC. HCMV products and JC virus with oncogenic potential may induce the development of various tumors including glioblastomas. The JC virus produces an early gene product, T-antigen, which has the ability to associate with and functionally inactivate well-studied tumor suppressor proteins including p53 and pRB.

간호대학생의 환자권리에 대한 인식과 윤리적 가치관이 생명의료윤리의식에 미치는 영향 (Influence of Perception of Patient rights and Ethical Values on Biomedical Ethics Awareness in Nursing Students)

  • 김미숙;전민경
    • 동서간호학연구지
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    • 제24권1호
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    • pp.1-9
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    • 2018
  • Purpose: The purpose of this study was to identify nursing students' perception of patient rights, their ethical values and biomedical ethics awareness, and to examine the factors affecting the nursing students' biomedical ethics awareness. Methods: The participants of this study were 273 nursing students in B and K metropolitan city. Data collection was conducted through the structured questionnaires from March 2 to March 25, 2016. Data were analyzed using t-test, ANOVA, Scheffe's test, Pearson's correlation coefficient, and multiple regression analysis with SPSS WIN v 21.0. Results: The mean scores of nursing students' perception of patient rights, ethical values and biomedical ethics awareness were $4.56{\pm}0.38$, $3.26{\pm}0.31$, $2.91{\pm}0.20$, respectively. Biomedical ethics awareness was positively correlated with the nursing students' perceptions of patient rights (r=.38, p<.001) and ethical values (r=.25, p<.001). Factors affecting the nursing students' biomedical ethics awareness were the perception of patient rights (${\beta}=.36$, p<.001) and ethical values (${\beta}=.13$, p=.023). Conclusion: The results suggest that nursing educational program should include perception of patient rights and ethical values to foster biomedical ethics awareness for nursing students.

Knowledge Levels of Turkish Nurses Related to Prevention and Early Diagnosis of Cancer

  • Ozkahraman, Sukran;Yildirim, Belgin
    • Asian Pacific Journal of Cancer Prevention
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    • 제13권12호
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    • pp.6105-6108
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    • 2012
  • Background: The aim of this study was to examine knowledge about cancer and early diagnosis of cancer among nurses. Materials and Method: This descriptive study was carried out at a University Faculty of Medicine Hospital in Turkey. Study between April and June, 2011, with 325 volunteer nurses. The collection tool consisted of two survey forms. The first was designed for sociodemographic information and the second consisted of 16 questions, prepared in accordance with the literature as open and close-ended, for interviews conducted by researchers. Results: Out of the individuals (n=325), included in the study, 90.8% were female, 63.1% high school-university graduates and 55.1% married, with an average years of service of $6.34{\pm}5.33$ and an average age of $28.1{\pm}5.10$. The mean cancer knowledge point was $70.1{\pm}19.5$. Some 79.1% of nurses had not received cancer related continuing education by specialists. A signified relation was found between the nurse knowledge on cancer and educational level (p<0.05). Conclusions: The nurse, a member of the health staff, is in constant contact with individuals at hospitals, schools, polyclinics, workplaces, and homes. When educating society about cancer, nurses need to have a high level of knowledge regarding early diagnosis and cancer prevention.

Egg Development of the Ussurian Bullhead Fish, Leiocassis ussuriensis (Pisces: Bagridae) and Morphological Development of Its Larvae and Juveniles

  • Park, Jae-Min;Yim, Hu-Sun;Lee, Yong-Sik;Kim, Heung-Yun;Han, Kyeong-Ho
    • 한국발생생물학회지:발생과생식
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    • 제19권4호
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    • pp.189-196
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    • 2015
  • This study was examined the ovogenesis of Ussurian bullhead, Leiocassis ussuriensis and the morphological development of its larvae and juveniles and to use the results as basic information for the preservation of species and resource enhancement. For artificial egg collection, human chorionic gonadotropin (HCG) was injected at a rate of 10 IU per gram of fish weight. During breeding period, water temperature maintained at $24.5{\sim}26.5^{\circ}C$ (mean $25.0{\pm}0.05^{\circ}C$). The process of ovogenesis reached the two-cell stage in 50 minutes after fertilization. In 73 hours of fertilization the movement of the embryoid body became active state and the larvae began to hatch from the tail through the oolemma. Length of prelarvae were 6.33~6.50 mm long (mean $6.40{\pm}0.06mm$) just after hatching having yolk with their mouth not opened. After thirty eight days of hatching, juveniles were 30.6~32.5 mm long (mean $31.5{\pm}0.65mm$). The color was dark yellowish brown throughout the entire body, and the number of caudal fin rays developed to thirty six perfectly.

신규간호사의 임상수행능력과 현장적응의 관계에서 전문직업성의 매개효과 (The Mediating Effect of Professionalism in the Relationship between Clinical Competence and Field Adaptation in Newly Graduated Nurses)

  • 김영순;박경연
    • 간호행정학회지
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    • 제19권4호
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    • pp.536-543
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    • 2013
  • Purpose: The purpose of this study was to identify the mediating effect of professionalism in the relationship between clinical competence and field adaptation in newly graduated nurses. Methods: The participants in this study were 213 nurses from four tertiary hospitals who had less than 12 months of nursing experience. Data were collected during January and February, 2013. A structured questionnaire was used for data collection and data were analyzed using descriptive statistics, Pearson correlation coefficients, and path analysis with the SPSS/WIN 21.0 and AMOS 21.0 programs. Results: The mean score for clinical competence was $2.85{\pm}0.25$, for professionalism, $3.10{\pm}0.30$, and for field adaptation, $2.79{\pm}0.37$. There was a significant positive relationship between clinical competence and field adaptation. Also, professionalism was positively correlated with field adaptation. Professionalism showed mediating effects between clinical competence and field adaptation. Improvement of clinical competence increased professionalism and the increased professionalism raised the field adaptation. Conclusion: Based on these findings, orientation programs including strategies to increase professionalism, should be established to promote effective field adaptation in newly graduated nurses. These orientation programs can strengthen professionalism, the mediator between clinical competence and field adaptation in newly graduated nurses.

Factors Associated with Health-Related Quality of Life in Tuberculosis Patients Referred to the National Research Institute of Tuberculosis and Lung Disease in Tehran

  • Kakhki, Ali Darvishpoor;Masjedi, Mohammad Reza
    • Tuberculosis and Respiratory Diseases
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    • 제78권4호
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    • pp.309-314
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    • 2015
  • Background: In tuberculosis (TB) patients, health-related quality of life (HRQoL) is significant in self-management, which in turn can be effective in therapeutic acceptance and prevention of treatment failure due to multi-drug resistant TB. This study was conducted to evaluate HRQoL and associated factors in TB patients referred to the National Research Institute of Tuberculosis and Lung Disease (NRITLD). Methods: In this study, patients were selected from TB clinics of the NRITLD in Tehran. In addition to an Iranian version of the Short-Form Health Survey (SF-36), demographic and disease characteristic questionnaires were used for data collection. The data were then analyzed using SPSS software. Results: Two hundred five TB patients, with the average age of $42.33{\pm}17.64$ years, participated in this study. The HRQoL scores in different domains ranged from $14.68{\pm}11.60$ for role limitations due to emotional problems to $46.99{\pm}13.25$ for general health perceptions. The variables of sex, marital status, education, job status, place of residence, and cigarette smoking, influenced the HRQoL scores in different dimensions. Conclusion: According to the study findings are the important variables that influenced the HRQoL of TB patients. The consideration of its can improve the HRQoL of TB patients.

간호대학 신입생의 생명의료윤리 의식에 관한 연구 (A Study on the Consciousness of Biomedical Ethics of Freshmen Nursing Students)

  • 정하윤;정귀임
    • 보건의료산업학회지
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    • 제6권4호
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    • pp.37-48
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    • 2012
  • This study sought to provide basic for the establishment of desirable sense of ethics values by analyzing the consciousness of biomedical ethics of freshmen nursing students. The subjects of the study were 420 freshmen nursing students. The period of data collection was from April 1 to 6, 2012 and collected data were analyzed on SPSS/PC 19.0 program. The results is followed; First, the mean score of the consciousness of biomedical ethics was $2.39{\pm}0.25$. While the mostly high ranked category of biomedical ethics was the right to life of newborn($2.76{\pm}0.39$), the category with the lowest score was the artificial abortion($2.13{\pm}0.39$). Second, with respect to the characteristics of participants there were statistically significant difference in total score according to age, religion, and participation in religious activity, experience of hearing for biomedical ethics, sources of information for biomedical ethics, ethical values for biomedical ethics, and in intention to attend biomedical ethics in subjects. As a result, an arbitration program that could promote either changeable or controllable ethical values must be considered with attention to the significant variables that can promote the consciousness of biomedical ethics of freshmen nursing students.