• Title/Summary/Keyword: T-test analysis

Search Result 10,833, Processing Time 0.043 seconds

Introduction to the standard reference data of electron energy loss spectra and their database: eel.geri.re.kr

  • Jeong Eun Chae;Ji-Soo Kim;Sang-Yeol Nam;Min Su Kim;Jucheol Park
    • Applied Microscopy
    • /
    • v.50
    • /
    • pp.2.1-2.7
    • /
    • 2020
  • Electron energy loss spectroscopy (EELS) is an analytical technique that can provide the structural, physical and chemical information of materials. The EELS spectra can be obtained by combining with TEM at sub-nanometer spatial resolution. However, EELS spectral information can't be obtained easily because in order to interpret EELS spectra, we need to refer to and/or compare many reference data with each other. And in addition to that, we should consider the different experimental variables used to produce each data. Therefore, reliable and easily interpretable EELS standard reference data are needed. Our Electron Energy Loss Data Center (EELDC) has been designated as National Standard Electron Energy Loss Data Center No. 34 to develop EELS standard reference (SR) data and to play a role in dissemination and diffusion of the SR data to users. EELDC has developed and collected EEL SR data for the materials required by major industries and has a total of 82 EEL SR data. Also, we have created an online platform that provides a one-stop-place to help users interpret quickly EELS spectra and get various spectral information. In this paper, we introduce EEL SR data, the homepage of EELDC and how to use them.

The Study on Internet of Things(IoT) Ecosystem Analysis and Its Policy Direction in Gyeonggi Province (경기도 사물인터넷 생태계 분석을 통한 정책방향 수립에 관한 연구)

  • Kim, Myung Jin;Lee, Jihoon
    • Journal of the Economic Geographical Society of Korea
    • /
    • v.19 no.1
    • /
    • pp.18-32
    • /
    • 2016
  • In the Hyper-connected society, each country set up its own policy and central government as well as provincial government makes a basic plan of developing IoT. Gyeonggi provincial government needs to cope actively with the changing international and national circumstances. The purpose of this paper is to frame policy as a provincial government with analysis IoT industry-academia-institute-governments ecosystem and in-depth interview. There are IoT related SMEs in Gyeonggi, especially manufacturing business and device fields. Universities are doing IoT researches by R&D funds from central as well as provincial governments. Central government-affiliated Institutions are researching. It is necessary for Gyeonggi provincial government to establish policy in order to actively operate IoT ecosystem while each innovation actors are cooperated in doing IoT; system/governce maintenance, environments and test-bed for the application.

  • PDF

Prediction Model for the Initial Rotational Stiffness of a Double Split T Connection (상·하부 스플릿 T 접합부의 초기회전강성 예측모델)

  • Yang, Jae-Guen;Kim, Yun;Park, Jae-Ho
    • Journal of Korean Society of Steel Construction
    • /
    • v.24 no.3
    • /
    • pp.279-287
    • /
    • 2012
  • A double split tee connection is used as a connection that is suitable for ordinary moment frames or special moment frames according to the combination of variables of the thickness of the T-stub flange and the gauge distance of the high-strength bolts. In order to demonstrate safe structural behavior, a double split tee connection must meet the requirements for inter-story drift angles and the moment of connection, as defined in the Korea Building Code-Structural. In order to determine whether the these requirements are met, it is necessary to predict rotational stiffness and the ultimate plastic moment of the connection. Therefore, this study primarily aimed to propose an analytical model for predicting the rotational stiffness of a double split tee connection under a static load. Toward this end, a three-dimensional, non-linear finite element analysis was carried out. Then, the applicability of the proposed model was verified after comparing the test results of this study with other studies.

Association Analysis of the Essential Hypertension Susceptibility Genes in Adolescents: Kangwha Study (청소년 고혈압 관련 유전자의 연관성 분석: Kangwha Study)

  • Suh, Il;Nam, Chung-Mo;Kim, Sung-Joo;Shin, Dong-Jik;Hur, Nam-Wook;Kang, Dae-Ryong
    • Journal of Preventive Medicine and Public Health
    • /
    • v.39 no.2
    • /
    • pp.177-183
    • /
    • 2006
  • Objectives : In this study we examined the association between the genetic markers ACE (A-240T, C-93T, I/D, A2350G), AGT (M235T), AT1R (A1166C), CYP11B2 (T344C, V386A), REN (G2646A), ADRB2 (G46A, C79G, T47C, T1641), GNB3 (C825T) and ADD1 (G460W) and the presence of essential hypertension in adolescents. Methods : The Kangwha Study is an 18-year prospective study that is aimed at elucidating the determinants of the blood pressure level from childhood to early adulthood. For this study, we constructed a case-control dataset of size of 277 and 40 family trios data from the Kangwha Study. For this purpose, we perform a single locus-based case-control association study and a single locus-based TDT (transmission/disequilibrium test) study. Results : In the case-control study, the single locus-based association study indicated that the ADD1 (G460W) (p=0.0403), AGT (M235T) (p=0.0002), and REN (G2646A) (p=0.0101) markers were significantly associated with the risk of hypertension. These results were not confirmed on the TDT study. This study showed that genetic polymorphisms of the ADD1, AGT and REN genes might be related to the hypertension in Korean adolescents. Conclusions : This study provided useful information on genetics markers related to blood pressure. Further study will be needed to confirm the effect of the alpha adducin gene, the angiotensinogen gene and the renin gene on essential hypertension.

Comparative Analysis of Anticancer and Antibacterial Activities among Seven Trametes Species

  • Ha Thi Kim Nguyen;Jiwon Lee;Yejin Park;Hyon Jin Park;Soon Kil Ahn;Jae Kwang Kim;Dong-Ku Kang;Minkyeong Kim;Chorong Ahn;Changmu Kim;Jaehyuk Choi
    • Mycobiology
    • /
    • v.51 no.4
    • /
    • pp.256-263
    • /
    • 2023
  • Species in the genus Trametes (Basidiomycota, Polyporales) have been used in natural medicine for a long time. Many studies reported that mycelia or fruiting bodies of Trametes spp. exhibited effects of antioxidant, anti-inflammatory, anticancer, and antimicrobial activities. However, comparative analysis in this genus is scarce due to limitation of morphological identification and the sample number. In this study, the 19 strains of seven Trametes species were chosen to generate a five-gene-based phylogeny with the 31 global references. In addition, 39 culture extracts were prepared for 13 strains to test for anticancer and antibacterial activities. Strong anticancer activities were found in several extracts from T. hirsuta and T. suaveolens. Anticancer activities of T. suaveolens, T. cf. junipericola and T. trogii were first described here. The antibacterial ability of T. versicolor and T. hirsuta extracts has been confirmed. The antibacterial activities of T. suaveolens have been reported at the first time in this study. These results suggest an efficient application of the genus Trametes as the drug resources especially for anticancer agents.

Effect of Health and Medical Law Education on Ethical Values, Social Responsibility and Political Efficacy in Senior Year Nursing Student (보건의약관계법규 교육이 간호대학 4학년 학생의 윤리적 가치관, 사회적 책무성 및 정치효능감에 미치는 효과)

  • Yun-Kyoung Kim
    • Journal of the Health Care and Life Science
    • /
    • v.11 no.2
    • /
    • pp.245-252
    • /
    • 2023
  • This study attempted to confirm the effects of a course on health and medical laws and regulations on ethical values, social responsibility, and political efficacy before and after the class. The participants were 59 fourth-year nursing students from a single university, and data were collected through a pre-post experimental design from September to December 2022. Data analysis was conducted using SPSS 27.0, including frequency analysis, means and standard deviations, and paired t-tests. The results of the study showed significant differences in students' ethical values(t=-6.728, p<.001), social responsibility(t=-5.842, p<.001), and political efficacy(t=-6.378, p<.001) after the course on health and medical laws and regulations. It appears that the development of programs and teaching methods that actively engage students in the health and medical laws and regulations course is necessary.

The Effects of Foot Reflexion Massage on Sleep Disturbance, Depression Disorder, and the Physiological Index of the Elderly (발반사마사지가 노인의 수면, 우울 및 생리적 지수에 미치는 영향)

  • Song, Rye-Hun;Kim, Do-Hwan
    • Journal of Korean Academy of Nursing
    • /
    • v.36 no.1
    • /
    • pp.15-24
    • /
    • 2006
  • Purpose: This study was to examine the effects of foot reflexion massage on sleep disturbance, depression disorder, and the physiological index of the elderly in nursing homes. Method: The research design was a non-equivalent control group pretest-posttest quasi-experimental study. The subjects in this study were 50 elderly people who resided in two different nursing homes in the same region. An experimental group and a control group were organized with 25 subjects respectively, and foot reflexion massage was provided for 12 sessions, 30 minutes per session. The selected dependent variables were sleep disturbance, depression disorder, and physiological indices(blood plasma serotonin, serum cortisol), which were all measured before and after foot reflexion massage was offered. Data analysis included $x^{2}$-test, t-test, paired t-test, and ANCOVA, using the SPSS program package. Result: 1. The experimental group improved sleep quality more than the control group. 2. The experimental group had less depression disorder than the control group. 3. The experimental group had higher serotonin levels than the control group. Conclusion: It's necessary to give foot reflexion massage as a successful nursing intervention to elderly who undergo a change in sleep, and suffer from a depression disorder due to a deterioration in sleep.

Development of E-Mail Education for Hyperlipidemia Health Check-up and Application Effects (고지혈증 수진자를 위한 전자메일 교육 프로그램 개발 및 적용효과)

  • Han, Sang-Sook;Kim, Sun-Hee
    • Journal of Korean Academy of Nursing
    • /
    • v.36 no.7
    • /
    • pp.1154-1163
    • /
    • 2006
  • Purpose: This study was to monitor the effects of forming desirable eating and exercise habits and change the blood lipid levels by developing and applying E-Mail educational programs for a hyperlipidemia health check-up. Method: The research design used a nonequivalent control group pre-post test. Ninety-nine subjects (Exp.=50, Cont.=49) were selected randomly and the male subjects agreed to a hyperlipidemia health check-up at a comprehensive medical screening center. This study verified validity and reliability through factor analysis on a life habit measurement tool. The data was analyzed with SPSS win 12.0 using an $X^2-test$, t-test, ANOVA and ANCOVA. Result: Eatingand exercise habit scores of the experimental group which were educated through E-Mails changed considerably more than that of the control group which was not educated. Total-cholesterol and LDL-cholesterol in the experimental group was considerably lower than that in the control group, but HDL-cholesterol increased considerably Triglycerides, however, didn't show change. Conclusion: An E-Mail educational program may be applied as a hyperlipldemia health check-up nursing intervention strategy.

The Development and Evaluation of Web-based Flash Content for Fighting Spirit Promotion in Patients with Cancer (암 환자 투병의지 증진을 위한 플래시 콘텐츠 개발 및 평가)

  • Oh, Pok-Ja
    • Korean Journal of Adult Nursing
    • /
    • v.20 no.3
    • /
    • pp.395-405
    • /
    • 2008
  • Purpose: The purpose of this study was to develop a Web-based flash content for fighting spirit promotion and to test its effect on cancer patients' fighting spirit. Methods: The 15-minute long Web-based flash content was developed using the following 5 process: analysis, planning, development, program operation and evaluation stages and utilized the multiple edition and revision processes from December 2005 to August 2006. The evaluation was done by one group pretest-posttest design. Study subjects were 17 cancer patients undergoing chemotherapy. The group were received a 2-week intervention, a day weekly, and measured the variables at baseline, 4 weeks later. The study was performed from August 2006 to February 2007 at a cancer center in Korea. Fighting spirit was measured by Mini-MAC(Mental Adjustment to Cancer). Data was analysed by descriptive statistics and paired t-test using SAS 9.13 program. Results: On the Web-based flash content, there are 4 menu bars that consisted of cancer diagnosis, symptom management, stress management, and cancer survivorship. The study group revealed significantly more fighting spirit than pre-test(t=-3.04, p=.008). Conclusion: This Web-based flash content can be utilized in psychosocial interventions for promoting fighting spirit in patients with cancer.

  • PDF

Effect of CAR and NPL on ROA: Empirical Study in Indonesia Banks

  • TANGNGISALU, Jannati;HASANUDDIN, Rusdiah;HALA, Yusriadi;NURLINA, Nurlina;SYAHRUL, Syahruni
    • The Journal of Asian Finance, Economics and Business
    • /
    • v.7 no.6
    • /
    • pp.9-18
    • /
    • 2020
  • This study seeks to analyze the effect of Non-Performing Loans and Capital Adequacy Ratio on Return on Assets on ten conventional banks listed on the Indonesia Stock Exchange (BEI-IDX). This study uses secondary panel data for 2015-2019 in the form of CAR and NPL values from ten conventional banks listed on the BEI-IDX during the 2020 observation period. The research approach is quantitative descriptive with data analysis methods, namely, linear regression. The testing phase of this study includes: transform value, F-test, T-test and hypothesis test with significancy level sig < 0.05. The results of this study reveal that Non-Performing Loans had a significant negative effect (t = -2,637) (0.011 <0.0) on Return on Assets, while Capital Adequacy Ratio has no significant effect on ROA (0.760 > 0.05). R2 value is 0.128 or 12.8%. It has a significant effect on variables, calling efforts by banks, governments, and authorities monetary of related institutions to maintain the stability of finance. The reduction of Non-Performing Loan impacts on assets and capital adequacy ratio, besides, the normal NPL will control the stability of finance. If a balance is created either in the form of values or amounts of the variables, the reduction in Non-Performing Loans will be controlled.