21 results on '"Yun Jeong Yang"'
Search Results
2. Dynamic Simulation Model of Miniature Tracked Forestry Tractor for Overturning and Rollover Safety Evaluation
- Author
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Yun-Jeong Yang, Moon-Kyeong Jang, and Ju-Seok Nam
- Subjects
dynamic simulation model ,miniature tracked forestry tractor ,minimum turning radius ,overturning ,rollover ,static sidelong falling angle ,Agriculture (General) ,S1-972 - Abstract
This study proposes a method to construct a dynamic simulation model to implement the lateral overturning and backward rollover characteristics of an actual tractor. Based on theoretical analysis, factors affecting these characteristics are identified, which include tractor weight, track width, wheelbase, location of mass center, weight distribution, heights of front and rear axles, and geometric shapes. The location of the mass center of the actual tractor is measured based on the standard test procedure set by the International Organization for Standardization, and the remaining influencing factors are derived through measurements. A three-dimensional (3D) model of the tractor is constructed to reflect all these factors. Additionally, a simulation model utilizing this 3D model is developed using a commercial dynamic simulation software program. The ability of the model to simulate the overturning and rollover characteristics of the actual tractor is verified by comparing the static sidelong falling angle and minimum turning radius with those of the actual tractor. The errors between the characteristics of the actual tractor and those of the 3D model and dynamic simulations are shown to be less than 5%, thus indicating that the proposed method can effectively simulate the overturning and rollover characteristics of the actual tractor.
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- 2024
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3. Expanding the diversity of mycobacteriophages: insights into genome architecture and evolution.
- Author
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Welkin H Pope, Deborah Jacobs-Sera, Daniel A Russell, Craig L Peebles, Zein Al-Atrache, Turi A Alcoser, Lisa M Alexander, Matthew B Alfano, Samantha T Alford, Nichols E Amy, Marie D Anderson, Alexander G Anderson, Andrew A S Ang, Manuel Ares, Amanda J Barber, Lucia P Barker, Jonathan M Barrett, William D Barshop, Cynthia M Bauerle, Ian M Bayles, Katherine L Belfield, Aaron A Best, Agustin Borjon, Charles A Bowman, Christine A Boyer, Kevin W Bradley, Victoria A Bradley, Lauren N Broadway, Keshav Budwal, Kayla N Busby, Ian W Campbell, Anne M Campbell, Alyssa Carey, Steven M Caruso, Rebekah D Chew, Chelsea L Cockburn, Lianne B Cohen, Jeffrey M Corajod, Steven G Cresawn, Kimberly R Davis, Lisa Deng, Dee R Denver, Breyon R Dixon, Sahrish Ekram, Sarah C R Elgin, Angela E Engelsen, Belle E V English, Marcella L Erb, Crystal Estrada, Laura Z Filliger, Ann M Findley, Lauren Forbes, Mark H Forsyth, Tyler M Fox, Melissa J Fritz, Roberto Garcia, Zindzi D George, Anne E Georges, Christopher R Gissendanner, Shannon Goff, Rebecca Goldstein, Kobie C Gordon, Russell D Green, Stephanie L Guerra, Krysta R Guiney-Olsen, Bridget G Guiza, Leila Haghighat, Garrett V Hagopian, Catherine J Harmon, Jeremy S Harmson, Grant A Hartzog, Samuel E Harvey, Siping He, Kevin J He, Kaitlin E Healy, Ellen R Higinbotham, Erin N Hildebrandt, Jason H Ho, Gina M Hogan, Victoria G Hohenstein, Nathan A Holz, Vincent J Huang, Ericka L Hufford, Peter M Hynes, Arrykka S Jackson, Erica C Jansen, Jonathan Jarvik, Paul G Jasinto, Tuajuanda C Jordan, Tomas Kasza, Murray A Katelyn, Jessica S Kelsey, Larisa A Kerrigan, Daryl Khaw, Junghee Kim, Justin Z Knutter, Ching-Chung Ko, Gail V Larkin, Jennifer R Laroche, Asma Latif, Kohana D Leuba, Sequoia I Leuba, Lynn O Lewis, Kathryn E Loesser-Casey, Courtney A Long, A Javier Lopez, Nicholas Lowery, Tina Q Lu, Victor Mac, Isaac R Masters, Jazmyn J McCloud, Molly J McDonough, Andrew J Medenbach, Anjali Menon, Rachel Miller, Brandon K Morgan, Patrick C Ng, Elvis Nguyen, Katrina T Nguyen, Emilie T Nguyen, Kaylee M Nicholson, Lindsay A Parnell, Caitlin E Peirce, Allison M Perz, Luke J Peterson, Rachel E Pferdehirt, Seegren V Philip, Kit Pogliano, Joe Pogliano, Tamsen Polley, Erica J Puopolo, Hannah S Rabinowitz, Michael J Resiss, Corwin N Rhyan, Yetta M Robinson, Lauren L Rodriguez, Andrew C Rose, Jeffrey D Rubin, Jessica A Ruby, Margaret S Saha, James W Sandoz, Judith Savitskaya, Dale J Schipper, Christine E Schnitzler, Amanda R Schott, J Bradley Segal, Christopher D Shaffer, Kathryn E Sheldon, Erica M Shepard, Jonathan W Shepardson, Madav K Shroff, Jessica M Simmons, Erika F Simms, Brandy M Simpson, Kathryn M Sinclair, Robert L Sjoholm, Ingrid J Slette, Blaire C Spaulding, Clark L Straub, Joseph Stukey, Trevor Sughrue, Tin-Yun Tang, Lyons M Tatyana, Stephen B Taylor, Barbara J Taylor, Louise M Temple, Jasper V Thompson, Michael P Tokarz, Stephanie E Trapani, Alexander P Troum, Jonathan Tsay, Anthony T Tubbs, Jillian M Walton, Danielle H Wang, Hannah Wang, John R Warner, Emilie G Weisser, Samantha C Wendler, Kathleen A Weston-Hafer, Hilary M Whelan, Kurt E Williamson, Angelica N Willis, Hannah S Wirtshafter, Theresa W Wong, Phillip Wu, Yun jeong Yang, Brandon C Yee, David A Zaidins, Bo Zhang, Melina Y Zúniga, Roger W Hendrix, and Graham F Hatfull
- Subjects
Medicine ,Science - Abstract
Mycobacteriophages are viruses that infect mycobacterial hosts such as Mycobacterium smegmatis and Mycobacterium tuberculosis. All mycobacteriophages characterized to date are dsDNA tailed phages, and have either siphoviral or myoviral morphotypes. However, their genetic diversity is considerable, and although sixty-two genomes have been sequenced and comparatively analyzed, these likely represent only a small portion of the diversity of the mycobacteriophage population at large. Here we report the isolation, sequencing and comparative genomic analysis of 18 new mycobacteriophages isolated from geographically distinct locations within the United States. Although no clear correlation between location and genome type can be discerned, these genomes expand our knowledge of mycobacteriophage diversity and enhance our understanding of the roles of mobile elements in viral evolution. Expansion of the number of mycobacteriophages grouped within Cluster A provides insights into the basis of immune specificity in these temperate phages, and we also describe a novel example of apparent immunity theft. The isolation and genomic analysis of bacteriophages by freshman college students provides an example of an authentic research experience for novice scientists.
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- 2011
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4. Safety Analysis of Fastening Device of Agricultural By-Product Collector in Various Ground Conditions
- Author
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Jeong-Hun Kim, Markumningsih Sri, Seok-Joon Hwang, Moon-Kyeong Jang, Seung-Jun Kim, Yun-Jeong Yang, and Ju-Seok Nam
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agricultural by-product collector ,rain-flow counting ,static safety factor ,fastening device ,fatigue life ,Agriculture (General) ,S1-972 - Abstract
In this study, to evaluate the safety of the fastening device, which is a vulnerable part of the agricultural by-product collector, the stress in fastening devices was measured, and the operational and driving safety were analyzed by deriving the static safety factor and fatigue life. The position with the maximum stress in fastening devices was identified through structural analysis simulation, and a stress measurement system was constructed using strain gauges. Test conditions for stress measurement were classified into three operating conditions (collection operation, driving with the loading part lifted to the highest point, and driving with the loading part lifted to the lowest point) and three soil conditions (even pavement, sloped pavement, and farmland). A process for deriving the fatigue life based on the measured stress was constructed by applying the rain-flow counting method, Goodman equation, and Palmgren–Miner’s rule via commercial software. From the stress measurement results, the collection operation exhibited the highest maximum stress, followed by driving with the loading part lifted to the highest point and driving with the loading part lifted to the lowest point. Under all conditions, the static safety factor of the fastening devices was found to be higher than 1.0 (1.16–1.33). The fatigue life of the fastening devices was also found to be longer than the service life of Korean agricultural machinery under all operating conditions. Therefore, the fastening devices are expected to operate safely under generated static and dynamic loads. The agricultural by-product collector can perform agricultural work and drive stably and is expected to contribute to reducing unnecessary labor force for Korean farms.
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- 2023
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5. Effect of Atractylodes lancea on nonalcoholic fatty liver disease rat induced by high fat - high fructose diet
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Mihyeon Hong, Yun Jeong Yang, Hye Yoom Kim, Kyoung Woo Cho, Ho Sub Lee, and Dae Gill Kang
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Physiology - Abstract
Non-alcoholic fatty liver disease (NAFLD) induced by long term high-fat and high-fructose diet has led to serious medical problems such as non-alcoholic steatohepatitis or cirrhosis. NAFLD has related to obesity, insulin resistance or type Ⅱ diabetes induced by western diet. With the increasing the incidence of obesity and NFALD due to western diet consisting of high-fat and high-fructose diets, research of the treatment or prevention of NFALD due to western diets is urgently needed. Atractylodes lancea (AL) is traditional Chinese medicine and has been used for diuretic, sedation or antibacterial effect. To investigate effect of AL on NAFLD rat model induced by high-fat and high fructose diet, present study was performed. To induce NAFLD, wistar rats, which were 9-weeks-old, were fed with 45 kcal% high fat diet and 10% fructose water daily for 16 weeks. The olmesartan and atractylodes lancea were treated by oral administration for 8 weeks every day. The groups were composed of 5 groups; control (CON, n=9) fed with 10 kcal% general diet, non-alcoholic fatty liver disease group (NFD, n=9) induced by 45 kcal% high fat diet and 10% fructose diet, NFD group with 10 mg/kg/day Olmesartan orally (OLM, n=9), NFD group with 100 mg/kg/day AL (ALL, n=9) and NFD group with 200 mg/kg/day AL (ALH, n=9). AL decreased body weight, liver weight and epididymal fat pads weight compared with NFD group induced by high-fat and high fructose diet. In serum biomarkers, glucose level of plasma, triglyceride level and total cholesterol level in plasma were increased in NFD group compared with CON. AL restored the serum biomarkers including glucose, or triglycerides and total cholesterol level in serum. The plasma HDL-Cholesterol level, which was decreased in NFD group, attenuated by AL treatment. The atherogenic coeffient was upregulated by chronic high-fat and high-fructose diet, however, the atherogenic coeffient was significantly restored in AL treatment group. Glutamic oxaloacetic transaminase (GOT) and glutamic pyruvate transaminase (GPT) were significantly deteriorated by long term high-fat and high-fructose diet. However, the GOT and GPT level in serum were alleviated in AL treatment groups. Oil red O staining showed that the lipid accumulation in the liver was increased in NFD group compared with CON. However, the lipid accumulation was restored by AL treatment groups. The fibrosis in liver was deteriorated in NFD induced by chronic high-fat and high fructose diet, however, the AL inhibited collagen deposition in liver. Also, AL suppressed the mRNA expressions of TGF-β, collagen Ⅰ and collagen Ⅲ in liver compared with NFD group. In liver tissue, the LXR and SREBP-1c mRNA expressions were downregulated in ALH group. Taken together, these results showed that AL could be potential supplements for NAFLD induced by long term high-fat and high-fructose diet by regulating fibrosis and LXR/SREBP-1c signaling pathway in liver. This study was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korean government (MSIP) (2017R1A5A2015805) (2022R1A6A3A01087272). This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.
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- 2023
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6. Effect of Atractylodes lancea on Cardio-Renal Function in High-Fat-High-Fructose Diet Induced Metabolic Syndrome Rats
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Yun Jeong Yang, Youn Jae Jang, Hye Yoom Kim, Yong Hee Kim, Ho Sub Lee, and Dae Gill Kang
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Physiology - Abstract
CRS (Cardio-Renal Metabolic Syndrome) refers to a series of entangled metabolic disorders, including type 2 diabetes, hypertension, hyperlipidemia, chronic kidney disease and heart failure, and is associated with obesity, systemic inflammation, and insulin resistance. Atractylodes lancea (AL) is the rhizome of Atractylodes. AL has been found to have diuretic, sedation, antibacterial, anticancer effects. Therefore, in this study, confirmed the effect of AL on improving cardiovascular and kidney function in the metabolic syndrome model. In this experiment, HFHFr were provided to rats for 8 weeks to induce metabolic syndrome, and the OMT (10 mg/kg/day) or AL (100 or 200 mg/kg/day) were administered orally for 8 weeks with HFHFr for 8 weeks to confirm its efficacy. Therefore, a total of 16 weeks of experiments were conducted. To compare Cont with HFHFr, MS categorys were measured. As a result, AL confirmed that HFHr decreased BW, fasting glucose, TG, and abdominal circumference, systolic blood pressure, and increased HDL-C. As a result of measuring insulin and performing OGTT to confirm insulin resistance, which is a major symptom of MS, AAL ameliorates increased insulin levels, and AAL2 significantly decreased blood glucose levels over time. As a result of confirming echocardiography for cardiac function diagnosis, ejection fraction (EF) and fractional shortening (FS) levels were lower in metabolic syndrome than in the control group and significantly improved in the AAL administration group. Staining to confirm the effect of the heart on fibrosis confirmed that collagen accumulation and fibrosis were increased in HFHFr, and improved by AAL compared to the control group. Therefore, these findings suggest that AL improves obesity, insulin resistance, dyslipidemia, and high blood pressure caused by metabolic syndrome, and has a protective effect on heart function decline and fibrosis of the heart and blood vessels. This study was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korean government (MSIP) (2017R1A5A2015805) (2021R1C1C2095327). This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.
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- 2023
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7. A Study on the Response Characteristics of 'Person in the Rain (PITR)' Drawing Test based on the Acculturative Stress of Vietnamese International Students
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Yun-Jeong Yang
- Subjects
Vietnamese ,Response characteristics ,language ,Psychology ,language.human_language ,Acculturation ,Developmental psychology ,Test (assessment) - Published
- 2020
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8. Isolation, Counting and Identification of Microorganisms from Elevator Button, ATM, and Smartphone Surface
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Dae Yong Lim, Min Suk Choi, Yun Jeong Yang, Ye Darm Park, Hyung Joo Kim, Woo Hyeong Kim, Eun Bin Lee, Yeon Soo An, Hak Jin Song, Jieun Kim, Yoon Jae Yoon, Jung Min Oh, and Chae Young Lee
- Subjects
Isolation (health care) ,Elevator ,business.industry ,Microorganism ,Identification (biology) ,Biology ,business ,Computer hardware - Published
- 2019
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9. Efficacy and safety of CAEC (Canavalia gladiata arctium lappa extract complex) on immune function enhancement: An 8 week, randomised, double-blind, placebo-controlled clinical trial
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Yang-Chun Park, Yunhee Lee, Sol-Ji Jung, Su-Won Lee, Kun-hoae Kim, Yee Ran Lyu, Yun Jeong Yang, Won-Kyung Yang, Seung-Hyung Kim, Suk Ran Yoon, In Chul Jung, and Han-Young Kim
- Subjects
0301 basic medicine ,Medicine (miscellaneous) ,Immune function ,Pharmacology ,Placebo ,Placebo group ,Double blind ,03 medical and health sciences ,0404 agricultural biotechnology ,Canavalia gladiata ,Immune system ,Immunity ,Arctium lappa ,Medicine ,Canavalia gladiate ,TX341-641 ,030109 nutrition & dietetics ,Nutrition and Dietetics ,biology ,business.industry ,Nutrition. Foods and food supply ,Functional food ,04 agricultural and veterinary sciences ,biology.organism_classification ,040401 food science ,Clinical trial ,CAEC ,business ,Food Science - Abstract
The aim of this study was to evaluate the efficacy and safety of CAEC (Canavalia gladiata arctium lappa extract complex) in adults with white blood cells between 3 and 8 × 103 cells/µL by assessing natural killer (NK) cell activity and immune-related biomarkers. Overall, 100 participants (CAEC group = 50, placebo group = 50) were randomised, and administered CAEC or placebo once daily for 8 weeks, with an evaluation visit performed every 4 weeks. NK cell activity, the primary outcome, significantly increased in CAEC when compared with the placebo at effector-to-target (E:T) ratios of 25:1 and 50:1 after 8 weeks. Compared with the placebo group, IL-10 demonstrated significant differences at week 8 in the CAEC group. Our findings demonstrate that CAEC is safe and enhances immune function by stimulating NK cell activity through IL-10 expression. Hence, we anticipate that CAEC can be developed as a functional food for stimulating immunity.
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- 2020
10. The Tradition of English Children’s Fantasy: Its Use in English Literature Classes
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Yun Jeong Yang
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Literature ,Critical thinking ,English literature ,business.industry ,media_common.quotation_subject ,Sociology ,Fantasy ,Romanticism ,Creativity ,business ,media_common - Published
- 2018
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11. The Effects of Childcare Teachers’ Infection Prevention Knowledge, Self-efficacy, and Emotional Labor on Their Infection Prevention Practice
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In Soo Kwon and Yun Jeong Yang
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Self-efficacy ,030506 rehabilitation ,03 medical and health sciences ,Emotional labor ,030504 nursing ,Infection control ,0305 other medical science ,Psychology ,Clinical psychology - Published
- 2016
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12. Factors Affecting Job Stress of Pediatric Nurses: Focusing on Self-Efficacy, Emotional Labor, Pediatric Nurse-Parent Partnership
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Eunyoung Hong and Yun Jeong Yang
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Parents ,Self-efficacy ,Job stress ,Emotions ,lcsh:R ,lcsh:Medicine ,Pediatrics ,Professional-family relations ,Emotional labor ,Nursing ,Pediatric Nurses ,Pediatrics, Perinatology and Child Health ,Parent partnership ,Child ,Psychology ,Pediatric nrsing - Abstract
Purpose: In this study self-efficacy, emotional labor, pediatric nurse-parent partnership and job stress of pediatric nurses were examined. Factors affecting job stress of pediatric nurses were also investigated. Methods: The study was done between June and September 2014, with a convenience sample of 145 nurses from 3 advanced general hospitals, 5 general hospitals and 2 children’s hospitals. Research data were collected via questionnaires and analysed using SPSS version 18.0. Results: Average levels of self-efficacy, emotional labor and job stress were similar to other general nurses and the average level of pediatric nurse-parent partnership was also similar to other pediatric nurses. Job stress of pediatric nurses showed a positive correlation with emotional labor and negative correlations with self-efficacy and pediatric nurse-parent partnership. The most significant factor affecting job stress in pediatric nurses was emotional labor (β = 0.372, p < .001). The combination of emotional labor, pediatric nurse-parent partnership and self-efficacy accounted for 25.4% of job stress in pediatric nurses. Conclusion: These results suggest that nursing management strategies to decrease emotional labor and improve pediatric nurse-parent partnerships and self-efficacy are critical to decrease job stress for pediatric nurses. Continued development of nursing management interventions to decrease job stress in pediatric nurses is suggested.
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- 2015
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13. [Effect of Visiting and a Smartphone Application Based Infection Prevention Education Program for Child Care Teachers: A Non-Randomized Controlled Trial]
- Author
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Yun Jeong, Yang and In Soo, Kwon
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Adult ,Infection Control ,030504 nursing ,business.industry ,Middle Aged ,Self Efficacy ,03 medical and health sciences ,0302 clinical medicine ,030225 pediatrics ,Child, Preschool ,Surveys and Questionnaires ,Medicine ,Humans ,Smartphone ,Child Care ,Program Development ,School Teachers ,0305 other medical science ,business ,General Nursing ,Software ,Program Evaluation - Abstract
This study was performed to develop an infection prevention education program for child care teachers and to verify its effects.The study was conducted using a nonequivalent control group with a pretest-posttest design. Four private daycare centers (2 centers per city) that were alike in terms of the number of children by age, number of child care teachers, and child care environment were chosen. Participants were assigned to the experimental group (n=20) or control group (n=20). As a part of the program, visiting education (90 min) was provided in the 1st week, and smartphone application education (10 min) was provided thrice a week, in the 2nd and 3rd weeks.Child care teachers' self-efficacy for infection prevention revealed a significant interaction effect between the group and time of measurement (F=21.62, p.001). In terms of infection prevention behavior, a significant difference was observed between the experimental and control groups (z=-5.36, p.001).The program implemented in this study was effective in improving the infection prevention self-efficacy and infection prevention behavior of child care teachers. Thus, this program may be effective in enhancing their infection control.
- Published
- 2017
14. The Effects of Collage Group Art Therapy on Decrease in Acculturative Stress of Married Migrant Women
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Keun, mae Lee and Yun Jeong Yang
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Group (periodic table) ,Art therapy ,Psychology ,Acculturation ,Clinical psychology - Published
- 2013
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15. The Effects of Group Art Therapy Program on Acculturative Stress of Married Migrant Women
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Keun, mae Lee and Yun Jeong Yang
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Group (periodic table) ,Art therapy ,Psychology ,Acculturation ,Clinical psychology - Published
- 2012
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16. Design and Implementation of Web-Based Self-directed Learning System for Word Processor Qualifying Exams
- Author
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Chang-Suk Kim and Yun-Jeong Yang
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Multimedia ,Computer science ,business.industry ,Process (engineering) ,computer.software_genre ,Variety (cybernetics) ,Constructivism (philosophy of education) ,Active learning ,Autodidacticism ,Web application ,The Internet ,business ,computer ,Word (computer architecture) - Abstract
The educational system has been changed owing to Web, which is most actively used on internet and has the characteristics of providing suitable environments for implementing constructivism study theory. WBI(Web Based Instruction), web-mediated teaching form for students at a long distance, has the advantages of possible interact between instructors and learners, offering a great variety of learning materials, and overcome the spatiotemporal restriction. This paper focuces on the construction of learning surroundings where the learner-centered, active learning can be done by design and Implementation of web based instruct system providing a sham examination with an item pool system. The web based Self-directed Learning system for word processor qualifying exams on this paper, can be mentioned as a real item pool that the question is not setting each time by the instructors but can be reused by reference on item pool bank, designed the number of question. It helps the learner Self-directed Learning study with evaluation during the web based instruct process and immediate feedback. It also provides the chance to research some similar using keyword. To sum up, this system can amplify the efficiency of study.
- Published
- 2006
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17. Separation of amino acids by simulated moving bed using competitive Langmuir isotherm
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Yun Jeong Yang, Chong Ho Lee, and Yoon Mo Koo
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chemistry.chemical_classification ,Chromatography ,Chemistry ,technology, industry, and agriculture ,Biomedical Engineering ,Tryptophan ,Langmuir adsorption model ,Bioengineering ,Phenylalanine ,Raffinate ,Applied Microbiology and Biotechnology ,Volumetric flow rate ,Amino acid ,chemistry.chemical_compound ,symbols.namesake ,Mass transfer ,symbols ,Simulated moving bed ,Biotechnology - Abstract
The separation of two amino acids, phenylalanine and tryptophan, was carried out using laboratory simulated moving bed (SMB) chromatography. The SMB process consisted of four zones, with each zone having 2 columns. The triangle theory was used to obtain the operating conditions for the SMB. The mass transfer coefficients of the two amino acids were obtained from the best-fit values by comparing simulated and experimental pulse data. The competitive adsorption isotherms of the two amino acids were obtained by single and binary frontal analyses, taking into consideration the competition between the two components. A competitive Langmuir isotherm, obtained from single-component frontal chromatography, was used in the first run, and the isotherm from binary frontal chromatography in the second, with the flow rate of zone I modified to improve the purity. Compared to the first and second runs, the competitive Langmuir isotherm from the binary frontal chromatography showed good agreement with the experimental results. Also, adjusting the flow rate in zone I increased the purity of the products. The purities of the phenylalanine in the raffinate and the tryptophan in the extract were 99.84 and 99.99%, respectively.
- Published
- 2004
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18. Continuous cultivation ofLactobacillus rhamnosus with cell recycling using an acoustic cell settler
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Sang-Mok Lee, Young-Jun Kim, Yoon-Mo Koo, Sung-Ho Hwang, and Yun-Jeong Yang
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Chromatography ,biology ,Continuous operation ,Biomedical Engineering ,Substrate (chemistry) ,Bioengineering ,biology.organism_classification ,Applied Microbiology and Biotechnology ,Continuous production ,Lactic acid ,chemistry.chemical_compound ,Lactobacillus rhamnosus ,chemistry ,Yield (chemistry) ,Fermentation ,Food science ,Industrial and production engineering ,Biotechnology - Abstract
Continuous production of lactic acid from glucose by Lactobacillus rhamnosus with cell recycling using an acoustic cell settler was carried out. The performance of the system, such as the concentration of cell and product were compared with the control experiment without recycling. The acoustic settler showed cell separation efficiency of 67 during the continuous operation and the cell concentration in the fermentor with recycle exceeded that of the control by 29. Com- pared with the control, lactic acid production was increased by 40, while glucose consumption was only increased by 8. The higher value of lactic acid production to substrate consumption (Y P/S , product yield coefficient) achieved by cell recycling is interpreted to indicate that the recy- cled cell mass consumes less substrate to produce the same amount of product than the control. Within system environmental changes due to the longer mean cell residence time induced the cells maintaining the metabolic pathways to produce less by-product but more product, lactic acid.
- Published
- 2002
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19. Expanding the diversity of mycobacteriophages: insights into genome architecture and evolution
- Author
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Chris R. Gissendanner, Jasper Van Kirk Thompson, Cynthia M. Bauerle, Kobie C. Gordon, Stephanie E. Trapani, Sarah C. R. Elgin, Ching-Chung Ko, Asma Latif, Caitlin E. Peirce, Jeremy S. Harmson, Elvis Nguyen, Jillian M. Walton, Siping He, Lauren L. Rodriguez, Jazmyn J. McCloud, Catherine J. Harmon, Angelica N. Willis, Melissa J. Fritz, Jessica A. Ruby, Michael P. Tokarz, Lisa Deng, Samantha T. Alford, Kathryn M. Sinclair, Victoria G. Hohenstein, Lauren Forbes, Erika F. Simms, Jessica M. Simmons, David A. Zaidins, Anthony T. Tubbs, Tyler M. Fox, Erica J. Puopolo, Garrett V. Hagopian, Hilary M. Whelan, Tina Q. Lu, Rachel Miller, Brandy M. Simpson, Emilie G. Weisser, Theresa W. Wong, Luke J. Peterson, Andrew C. Rose, Chelsea L. Cockburn, Tuajuanda C. Jordan, Daniel A. Russell, Yetta M. Robinson, Justin Z. Knutter, Tin-Yun Tang, Daryl Khaw, Ian Winsten Campbell, Stephen B. Taylor, Arrykka S. Jackson, Zein Al-Atrache, Amanda R. Schott, Samantha C. Wendler, John R. Warner, Sequoia I. Leuba, Steven G. Cresawn, J. Bradley Segal, Hannah S. Wirtshafter, Margaret S. Saha, Christine A. Boyer, Melina Y. Zúniga, Lucia P. Barker, Tamsen Polley, Marcella L. Erb, Anjali Menon, Victoria A. Bradley, Amanda J. Barber, Charles A. Bowman, Kaitlin E. Healy, Molly J. McDonough, Kaylee M. Nicholson, A. Javier Lopez, Andrew A. S. Ang, Erica M. Shepard, Leila Haghighat, Matthew B. Alfano, Manuel Ares, Kathryn Sheldon, Murray A. Katelyn, Alexander G. Anderson, Jeffrey D. Rubin, Larisa A. Kerrigan, Lisa Alexander, Krysta R. Guiney-Olsen, Deborah Jacobs-Sera, Junghee Kim, Rebecca Goldstein, Clark L. Straub, Lianne B. Cohen, Anne Georges, Erin N. Hildebrandt, Angela E. Engelsen, Bridget G. Guiza, Russell D. Green, Paul G. Jasinto, Allison M. Perz, Turi A. Alcoser, Laura Z. Filliger, H. S. Rabinowitz, Christopher D. Shaffer, Kathleen Weston-Hafer, William D. Barshop, Blaire C. Spaulding, Andrew J. Medenbach, Joseph Stukey, Michael J. Resiss, Samuel E. Harvey, Aaron A. Best, Nichols E. Amy, Kevin J. He, Erica C. Jansen, Danielle H. Wang, Katrina Nguyen, Katherine Belfield, Christine E. Schnitzler, Seegren V. Philip, Ian M. Bayles, Belle E. V. English, Graham F. Hatfull, Victor Mac, Barbara J. Taylor, Kathryn E. Loesser-Casey, Ingrid J. Slette, Nathan A. Holz, Rachel E. Pferdehirt, Emilie T. Nguyen, Nicholas Lowery, Agustin Borjon, Bo Zhang, Gail V. Larkin, Lynn O. Lewis, Ellen R. Higinbotham, Kevin W. Bradley, Patrick Ng, Brandon C. Yee, Kurt E. Williamson, Anne M. Campbell, Welkin H. Pope, Roger W. Hendrix, Craig L. Peebles, Jonathan M. Barrett, Brandon K. Morgan, Ericka L. Hufford, Ann M. Findley, Kayla N. Busby, Jonathan W. Shepardson, Breyon R. Dixon, Joe Pogliano, Stephanie Guerra, Robert Sjoholm, Dale J. Schipper, Phillip Wu, Steven M. Caruso, Larissa K. Temple, Yun jeong Yang, Jason H. Ho, Kohana D. Leuba, Judith Savitskaya, Alyssa Carey, Peter M. Hynes, Jonathan W. Jarvik, Jonathan Tsay, Corwin N. Rhyan, Marie D. Anderson, Lyons M. Tatyana, Rebekah D. Chew, Jennifer R. Laroche, Jessica S. Kelsey, Jeffrey Corajod, Keshav Budwal, James Sandoz, Tomas Kasza, Alexander P. Troum, Lindsay A. Parnell, Crystal Estrada, Sahrish Ekram, Shannon Goff, Hannah Wang, Mark H. Forsyth, Lauren N. Broadway, Madav K. Shroff, Zindzi D. George, Dee R. Denver, Grant A. Hartzog, Kimberly R. Davis, Kit Pogliano, Isaac R. Masters, Trevor Sughrue, Courtney A. Long, Vincent J. Huang, Gina M. Hogan, and Roberto Puertas Garcia
- Subjects
Genome evolution ,Science Policy ,Mycobacteriophage ,Population ,lcsh:Medicine ,Genome, Viral ,Biology ,Microbiology ,Genome ,03 medical and health sciences ,Virology ,education ,lcsh:Science ,Genome Evolution ,030304 developmental biology ,Genetics ,Comparative genomics ,0303 health sciences ,education.field_of_study ,Multidisciplinary ,Base Sequence ,Geography ,Mycobacteriophages ,030306 microbiology ,lcsh:R ,Genetic Variation ,Sequence Analysis, DNA ,Genomics ,Comparative Genomics ,Biological Evolution ,United States ,3. Good health ,Science Education ,Evolutionary biology ,Viral evolution ,DNA, Viral ,lcsh:Q ,Mobile genetic elements ,Research Article - Abstract
Mycobacteriophages are viruses that infect mycobacterial hosts such as Mycobacterium smegmatis and Mycobacterium tuberculosis. All mycobacteriophages characterized to date are dsDNA tailed phages, and have either siphoviral or myoviral morphotypes. However, their genetic diversity is considerable, and although sixty-two genomes have been sequenced and comparatively analyzed, these likely represent only a small portion of the diversity of the mycobacteriophage population at large. Here we report the isolation, sequencing and comparative genomic analysis of 18 new mycobacteriophages isolated from geographically distinct locations within the United States. Although no clear correlation between location and genome type can be discerned, these genomes expand our knowledge of mycobacteriophage diversity and enhance our understanding of the roles of mobile elements in viral evolution. Expansion of the number of mycobacteriophages grouped within Cluster A provides insights into the basis of immune specificity in these temperate phages, and we also describe a novel example of apparent immunity theft. The isolation and genomic analysis of bacteriophages by freshman college students provides an example of an authentic research experience for novice scientists.
- Published
- 2011
20. SEPARATION OF AMINO ACID BY SIMULATED MOVING BED USING COMPETITIVE LANGMUIR ISOTHERM.
- Author
-
CHONG HO LEE, YUN JEONG YANG, and YOON MO KOO
- Subjects
SEPARATION (Technology) ,AMINO acids ,SIMULATION methods & models ,LANGMUIR isotherms ,ADSORPTION (Chemistry) - Published
- 2004
21. Nursery Teachers' Knowledge, Attitude and Performance Ability in CardioPulmonary Resuscitation.
- Author
-
Yun Jeong Yang and In Soo Kwon
- Subjects
CHILD care ,CARDIOPULMONARY resuscitation ,PRESCHOOLS ,PROFESSIONS ,TEACHERS ,COLLEGE teacher attitudes - Abstract
Purpose: This study was done to identify the level of knowledge, attitude and performance ability in CardioPulmonary Resuscitation (CPR) and provided data for the development of an education program to improve CPR performance ability of nursery teachers. Methods: The participants were 220 nursery teachers working in daycare centers in A city located in G province. Data were collected during July, 2013. Results: The mean scores were 45.88 of 100 for knowledge, 3.69 of 5 for attitude, 2.65 of 5 for performance ability. There were significant differences in knowledge and performance ability according to education experience. There were positive correlations between knowledge and performance ability, and between attitude and performance ability. Factors affecting CPR performance ability were knowledge (β=.133), attitude (β=.327), and education in CPR (β=.343). These factors explained 29.4% of the variance in CPR performance ability. Conclusion: Results indicate that nursery teachers' knowledge, attitude and CPR performance ability were not sufficient enough to perform accurate CPR in an emergency. Therefore, to improve performance ability of nursery teachers to carry out CPR in a cardiac arrest emergency of a child, educational strategies that focus on increasing knowledge and attitude need to be developed. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
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