• Title/Summary/Keyword: T-test analysis

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Usage Frequency and Importance of Competencies Required to Restaurant Industry Professionals (외식산업 전문인력의 역량 유형별 사용 빈도 및 중요도 인식 분석)

  • Choi, Hyun-Joo;Yang, Il-Sun;Cha, Jin-A;Shin, Seo-Young
    • Journal of the Korean Society of Food Culture
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    • v.22 no.2
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    • pp.201-209
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    • 2007
  • The purpose of this study was to analyze usage frequency and importance of competencies which are required to restaurant industry professionals. For this purpose, opinions of restaurant industry professionals on the competency were surveyed using questionnaires. To develop a questionnaire, a total of 27 competency variables which are required to restaurant industry professionals were drawn through literature review. Questionnaires were distributed to 300 professionals in restaurant industry with different positions using random sampling. Out of 300 questionnaires, 221 questionnaires were used for analysis. Statistical analysis was conducted using SPSS 10.0, including descriptive analysis, ANOVA and t-test. Reliability test and factor analysis were also conducted to evaluate the reliability and validity of the questionnaire. As a result, 'attitude and personality' factor was recognized as the most frequently used and the most important competency factor of restaurant industry professionals. Therefore, the competency such as 'sincerity', 'responsibility', 'sense of honesty', 'positive attitude', 'tolerance and justice', should be more emphasized in restaurant management education. The level of current usage and importance of each competency were different according to age, education level, working experience, position, number of employees, type of restaurant and type of management.

Rotation Control of Shoulder Joint During Shoulder Internal Rotation: A Comparative Study of Individuals With and Without Restricted Range of Motion

  • Min-jeong Chang;Jun-hee Kim;Ui-jae Hwang;Il-kyu Ahn;Oh-yun Kwon
    • Physical Therapy Korea
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    • v.31 no.1
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    • pp.72-78
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    • 2024
  • Background: Limitations of shoulder range of motion (ROM), particularly shoulder internal rotation (SIR), are commonly associated with musculoskeletal disorders in both the general population and athletes. The limitation can result in connective tissue lesions such as superior labrum tears and symptoms such as rotator cuff tears and shoulder impingement syndrome. Maintaining the center of rotation of the glenohumeral joint during SIR can be challenging due to the compensatory scapulothoracic movement and anterior displacement of the humeral head. Therefore, observing the path of the instantaneous center of rotation (PICR) using the olecranon as a marker during SIR may provide valuable insights into understanding the dynamics of the shoulder joint. Objects: The aim of the study was to compare the displacement of the olecranon to measure the rotation control of the humeral head during SIR in individuals with and without restricted SIR ROM. Methods: Twenty-four participants with and without restricted SIR ROM participated in this study. The displacement of olecranon was measured during the shoulder internal rotation control test (SIRCT) using a Kinovea (ver. 0.8.15, Kinovea), the 2-dimensional marker tracking analysis system. An independent t-test was used to compare the horizontal and vertical displacement of the olecranon marker between individuals with and without restricted SIR ROM. The statistical significance was set at p < 0.05. Results: Vertical displacement of the olecranon was significantly greater in the restricted SIR group than in the control group (p < 0.05). However, no significant difference was observed in the horizontal displacement of the olecranon (p > 0.05). Conclusion: The findings of this study indicated that individuals with restricted SIR ROM had significantly greater vertical displacement of the olecranon. The results suggest that the limitation of SIR ROM may lead to difficulty in rotation control of the humeral head.

Do age, gender, and subjective health-related factors influence health-related life satisfaction in people with disabilities who are physically active?: a secondary analysis

  • Hyunseok Cho;Sukhee Ahn
    • Women's Health Nursing
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    • v.30 no.1
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    • pp.56-66
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    • 2024
  • Purpose: This study explored the factors influencing the health-related life satisfaction of people with disabilities who engaged in physical activity, by age and gender. Methods: A secondary analysis was conducted of the 2020 Third Disability and Life Dynamics Panel (2021). The participants were 2,796 people who performed regular physical activity at least once a week. The variables selected were disability-related factors (degree of disability, multiple disabilities, and type of disability), sociodemographic factors (age, gender, living alone, and mean monthly family income), and health-related factors (amount of physical activity, self-esteem, depression, chronic disease, subjective health, and health-related life satisfaction). Descriptive statistics, the chi-square test, the t-test, two-way analysis of variance, and multiple regression analysis were conducted. Results: In total, 58.0% of participants were male, and 42.0% were female. For age groups, 14.4% were children/adolescents (0-19 years), 42.6% were adults (20-59 years), and 43.0% were seniors (≥60 years). The mean score for health-related life satisfaction was 5.0±2.15 out of 10. Adults and seniors whose level of physical activity met or exceeded recommendations had higher subjective health. Moreover, men had better subjective health than women in seniors. Health-related life satisfaction was higher among those who had higher self-esteem, were not depressed, did not have chronic diseases, and had better subjective health. Conclusion: Gender significantly influenced health-related life satisfaction in children/ adolescents and seniors. Disability-related factors were significant in adults, and health-related factors were significant in all age groups. Therefore, these factors should be considered when designing interventions to promote subjective health and health-related life satisfaction of people with disabilities.

Analysis of Academic Achievements and Employment Preparation Behavior in College Students Majoring in Cosmetology - Focusing on Demographic Variables - (미용전공 대학생의 학업성취도 및 취업준비행동 - 인구통계학적 변인을 중심으로 -)

  • Hyoung-jeon Choi;Hyun-jin Jeon
    • Fashion & Textile Research Journal
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    • v.26 no.2
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    • pp.208-217
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    • 2024
  • It has recently become difficult for college students majoring in cosmetology to gain employment after graduation. Under this circumstance, this study attempted to investigate students' academic achievements and employment preparation behavior based on their demographic characteristics. To accomplish this, a questionnaire survey was conducted involving 234 college men and women in Gwangju and Jeollanam-do from April 12 to 30, 2022. Out of an initial 260 questionnaires distributed, 250 were collected. Of these, 234 copies, excluding 16 poorly answered ones, were used for final analysis. The collected data were analyzed using frequency analysis, exploratory factor analysis, Cronbach's alpha, a t-test, and an F-test, employing SPSS 21.0, which revealed the following: First, concerning academic achievements based on demographic characteristics, a statistically significant difference was found in "motives to select the cosmetology department," "most important aspects for career decision," and "academic major-related license." Second, concerning employment preparation behavior, a statistically significant difference was observed in "academic year," "motives to select the cosmetology department," and "academic major-related license." The above findings confirmed a statistically significant difference in academic achievements and employment preparation behavior, ensuring a better understanding of academic achievements and employment preparation behavior. It is anticipated that those majoring in cosmetology would be more active in job preparation and ultimately obtain the profession they desire with a positive and healthy mindset.

Bioequivalence Evaluation of Pylocin Tablet to Klaricid Tablet (Clarithyomycin, 250 mg) (클래리시드 정(클래리스로마이신 250 mg)에 대한 파이로신 정의 생물학적 동등성)

  • Cho, Hea Young;Kim, Soo Jin;Sim, Young Sun;Lim, Dong Koo;Oh, In Joon;Lee, Yong Bok;Moon, Jai Dong
    • Korean Journal of Clinical Pharmacy
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    • v.10 no.1
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    • pp.13-18
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    • 2000
  • The bioequivalence of two clarithromycin tablets, the $Klaricid^{TM}$ (Ciba-Geigy Korea Ltd.) and the $Pylocin^{TM}$ (Kyungdong Pharmaceutical Co., Ltd.), was evaluated according to the Korean Guidelines for Bioequivalence Test (KGBT 1998). Sixteen healthy male volunteers ($20\sim26$ years old) were randomly divided into two groups and a randomized $2\times2$ cross-over study was employed. After one tablet containing 250 mg of clarithromycin was orally administered, blood sample was taken at predetermined time intervals, and the concentrations of clarithromycin in serum were determined using high-performance liquid chromatographic method with electrochemical detector. The pharmaco-kinetic parameters (area under the concentration-time curve: $AUC_t$, maximum concentration; $C_{max}$ and time to maximum concentration; $T_{max}$) were calculated and analysis of variance (ANOVA) was utilized for the statistical analysis of parameters. The results showed that the differences in $AUC_t,\;C_{max}\;and\;T_{max}$ between two tablets based on $Klaricid^{TM}$ tablet were $-0.22\%,\;-0.48\%\;and\;-1.63\%$, respectively. The powers $(1-\beta)\;for\;AUC_t,\;C_{max}\;and\;T_{max}\;were\;99.07\%,\;88.15\%\;and\;99.99\%$, respectively. Detectable differences $(\Delta)\;and\;90\%$ confidence intervals ($\alpha$=0.10) were all less than $\pm20\%$ All the parameters above met the criteria of KGBT 1998, indicating that $Pylocin^{TM}$ tablet is bioequivalent to $Klaricid^{TM}$ tablet.

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Perception of Good Death among Nursing Students (간호대학생의 좋은 죽음 인식)

  • Il-hoon Yun;Weon-Hee Moon;Su-Jeong Park
    • Journal of Advanced Technology Convergence
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    • v.2 no.2
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    • pp.23-30
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    • 2023
  • This study is a descriptive research study conducted to find out the level of perception of the good death among nursing students and compare sub-factors among the perceptions of a good death. As for the research method, 102 people who explained the purpose of the study and agreed to participate were conveniently recruited. As a research tool, 'Measure of concept of a Good Death' by Schwartz et al. (2003) was translated by Lee (2017), and the research was conducted through online. For data analysis, statistical techniques such as descriptive statistics, frequency analysis, t-test, and one-way ANOVA of the IBM SPSS Statistics 26 program were used. Factors showing average differences in scores for each of the three sub-factors of good death awareness were derived from the experience of clinical practice. The mean of good death (3.13±0.36 points) of nursing students who experienced clinical practice was statistically significantly higher than that of students without clinical practice experience (2.90±0.31 points) (t=3.156, p=.002). In particular, the mean of good death for 'closure' was statistically significantly higher for those with experience in clinical practice (3.46±0.39 points) than those without experience (3.16±0.37 points) (t=3.476, p=.001). Through this study, it was confirmed that nursing students' perception of a good death differed depending on whether or not they were in clinical practice. The results of this study are expected to provide basic data for the establishment of effective educational strategies for the perception of good death in nursing students.

Safety Test of Brown Rice Expressing Arabidopsis Calcium Transporter by Feeding Trial in Mice (애기장대 칼슘수송체를 발현하는 형질전환 현미의 생쥐 식이를 통한 안전성 평가)

  • Kim, Kyung-Min;Kim, Chang-Kil;Kim, Byung-Oh
    • Journal of Life Science
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    • v.18 no.10
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    • pp.1390-1394
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    • 2008
  • Previously, we found that the transgenic rice plants over-expressing the Arabidopsis $H^+/Ca^{2+}$ antiporter CAX 1 (accession no. U57411) gene accumulated 2.7 to 7.5-fold more calcium in the T3 rice grains as compared to those of control. To examine physiological safety of the $T_3$ rice grains, the effect of the $T_3$ brown rice on change in levels of body weight and white blood cells was compared with that of the control Ilpum brown rice by feeding trial in mice. During the feeding trial for one month, there was no significant difference between two mice groups, which were fed by the $T_3$ brown rice or Ilpum brown rice. There were no detectable differences in their effects on immune functions including plaque-forming unit, peritoneal macrophage number, and NK-cell activity. In addition, biochemical analysis of the blood failed to exhibit any difference between two mice groups. Together, these results suggested that the $T_3$ brown rice, which was produced from a genetically modified organism (GMO), might be safe and possess a potential to be applicable as calcium-fortified feed or food. Long-term safety of the $T_3$ brown rice, however, remains to be elucidated.

A Quantitative Analysis of ΔK Conversion Method for the Retardation Behavior of Fatigue Crack Growth in Varying Thickness of Al 2024-T3 Sheet Alloy (판재 Al 2024-T3 합금재료에서 나타나는 두께별 피로균열진전지연거동에 관한 ΔK환산법의 정량적분)

  • Kim, Seung-Gwon;Lee, Ouk-Sub
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.11
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    • pp.1415-1422
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    • 2011
  • Sheet aluminum alloys used in manufacturing of machine structures for transportation show the difference of crack growth speed depending on thickness under the constant fatigue stress condition. The referred thickness effect is a major fatigue failure property of sheet aluminum alloys. In this work, we identified the thickness effect in fatigue test of thick plate and thin plate of Al 2024-T3 alloy under the constant fatigue stress condition, and presented the thickness effect to a correlative equation, $U_{i}^{equ}=f(R_t)$ which is determined by the shape factor, thickness ratio, $R_t$ and the loading factor, equivalent effective stress intensity ratio depending on thickness, $U_{i}^{equ}$. And we analyzed quantitatively the crack growth retardation behavior in thin plate compared to thick plate by the thickness effect using ${\Delta}K$ conversion method. We obtained such values as decrement of thickness(DoT), decrement of stress intensity factor range, ${\Delta}K$ (DoS) and identified the relation between them to present the nature of thickness effect in this work.

Bioequivalence of Cardil Tablet to Cardura Tablet (Doxazosin 2 mg) (카두라 정(독사조신 2 mg)에 대한 카르딜 정의 생물학적 동등성)

  • Cho, Hea-Young;Kim, Soo-Jin;Shim, Young-Sun;Lim, Dong-Koo;Oh, In-Joon;Moon, Jai-Dong;Lee, Yong-Bok
    • Journal of Pharmaceutical Investigation
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    • v.30 no.1
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    • pp.61-65
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    • 2000
  • Doxazosin, a postsynaptic selective ${\alpha}1-adrenoceptor$ antagonist, is a potent antihypertensive agent which reduces peripheral resistance and blood pressure by vasodilatation of peripheral vessels. It is also used in the treatment of urinary obstruction by benign prostatic hypertrophy. The purpose of the present study was to evaluate the bioequivalence of two doxazosin tablets, $Cardura^{TM}$ (Pfizer Korea Ltd.) and $Cardil^{TM};$ (Kyungdong Pharmaceutical Co., Ltd.), according to the guidelines of Korea Food and Drug Administration (KFDA). Sixteen normal male volunteers, $24.19{\pm}2.48$ years in age and $62.41{\pm}6.66$ kg in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After one tablet containing 2 mg of doxazosin was orally administered, blood was taken at predetermined time intervals and the concentrations of doxazosin in serum were determined with an HPLC method using spectrofluorometric detector. Pharmacokinetic parameters such as $AUC_t,\;C_{max}\;and\;T_{max}$ were calculated and ANOVA test was utilized for the statistical analysis of the parameters. The results showed that the differences in $AUC_t,\;C_{max}\;and\;T_{max}$ between two tablets were -1.54%, -1.51 % and 3.42%, respectively, when calculated against the $Cardura^{TM}$ tablet. The powers $(1-{\beta})$ for $AUC_t,\;C_{max}\;and\;T_{max}$ were all more than 99.00%. Minimum detectable differences $(\Delta)$ at ${\alpha}=0.05\;and\;1-{\beta}=0.8$ were all less than 20% (e.g., 12.73%, 12.84% and 13.01% for $AUC_t,\;C_{max}\;and\;T_{max}$, respectively). The 90% confidence intervals were all within :${\pm}20%$ (e.g., $-8.97{\sim}5.90,\;-9.01{\sim}6.00\;and\;-4.16{\sim}11.05\;for\;AUC_t,\;C_{max}\;and\;T_{max},\;respectively)$. All of the above para- meters met the criteria of KFDA for bioequivalence, indicating that $Cardil^{TM}$ tablet is bioequivalent to $Cardura^{TM}$ tablet.

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Bioequivalence of Tigrin Capsule to Disgren Capsule (Triflusal 300 mg) (디스그렌 캅셀(트리플루살 300 mg)에 대한 티그린 캅셀의 생물학적 동등성)

  • Kim, Soo-Jin;Shim, Young-Sun;Son, Sun-Mi;Lim, Dong-Koo;Moon, Jai-Dong;Lee, Yong-Bok
    • Journal of Pharmaceutical Investigation
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    • v.29 no.4
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    • pp.355-360
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    • 1999
  • Triflusal is a new antithrombotic agent which inhibits both platelet cyclooxygenase and c-AMP phosphodiesterase activity. The purpose of the present study was to evaluate the bioequivalence of two triflusal capsules, $Disgren^{TM}$ (Myung-In Pharmaceutical Co., Ltd.) and $Tigriri^{TM}$ (Hana Pharmaceutical Co., Ltd.) according to the guidelines of Korea Food and Drug Administration (KFDA). Eighteen normal male volunteers, $22.94{\pm}1.83$ in age and $63.7l{\pm}10.43$ kg in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After one capsule containing 300 mg of triflusal was orally administered, blood was taken at predetermined time intervals and the concentrations of triflusal in serum were determined using HPLC method with UV detector. Pharmacokinetic parameters such as $AUC_t$ $C_{max}$ and $T_{max}$ were calculated and ANOVA test was utilized for the statistical analysis of the parameters. The results showed that the differences in $AUC_t$ $C_{max}$ and $T_{max}$ between two capsules were -0.30%, 0.81 % and -3.03%, respectively when calculated against the $Disgren_{TM}$ capsule. The powers $(1-{\beta})$ for $AUC_t$ $C_{max}$ and $T_{max}$ were 98.29%,84.73% and 81.02%, respectively. Minimum detectable differences $({\Delta})$ at ${\alpha}=0.1$ and $1-{\beta}=0.8$ were all less than 20% (e.g., 12.91%, 18.46% and 19.65% for $AUC_t$ $C_{max}$ and $T_{max}$ respectively). The 90% confid,ence intervals were all within ${\pm}20%$(e.g., $-8.97{\sim}8.37$, $-11.58{\sim}13.22$ and $-16.23{\sim}10.17$ for $AUC_t$ $C_{max}$ and $T_{max}$, respectively). All of the above parameters ($1-{\beta}, {\Delta}$ and 90% confidence intervals) met the criteria of KFDA for bioequivalence, indicating that $Tigriri^{TM}$ capsule is bioequivalent to $Disgren^{TM}$ capsule.

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