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‘잘 모르겠음’ 답지와 추측에 대한 차별점수화가 차별기능검사와 피험자 응답 적합도에 미치는 영향
시기자,이유미,성태제 이화여자대학교 교육과학연구소 2007 교육과학연구 Vol.38 No.3
선택형 검사는 피험자가 추측에 의하여 응답할 수 있는 단점을 지니고 있으며, 추측에 의한 응답은 피험자 능력추정의 오차를 증가시킬 뿐 아니라 검사의 양호도에도 영향을 미친다. 이 연구에서는 추측에 의한 응답을 줄이기 위해 ‘잘 모르겠음’이라는 답지를 포함하는 것과 오답과 ‘잘 모르겠음’이라는 응답에 대해 차별적으로 점수를 적용하는 방안이 검사의 측정학적 특성에 어떠한 영향을 미치는지 차별기능검사와 피험자응답 적합도 측면에서 살펴보고자 하였다. 이를 위해 아무런 처치도 가하지 않은 집단과 ‘잘 모르겠음’이라는 답지를 포함한집단, 추측한 응답에 대해 차별점수를 적용한다고 공지한 집단으로 구분하여 검사를시행하였다. 추측에 대한 차별점수화의 영향을 알아보기 위하여 오답과 ‘잘 모르겠음’답지에 대한 차별점수화를 공지한 집단의 경우 자료처리에 있어서는 차별점수를 적용하는 조건과 적용하지 않는 조건으로 구분하였다. 분석결과, 4가지 조건 중 ‘잘 모르겠음’이라는 답지를 포함하고 있는 조건에서 피험자 응답 적합도가 보다 양호한 것으로나타났으며, 동일한 내용을 측정하는 검사라 할지라도 추측에 의한 응답을 고려하지않는 검사 유형과 비교할 때 ‘잘 모르겠음’이라는 답지를 포함하거나 ‘잘 모르겠음’이라는 답지를 포함하면서 추측에 대한 차별점수화를 예고할 경우 검사가 달리 기능하는것으로 분석되었다. The primary purpose of this study is to investigate the effects of ‘don't know’response option and differential scoring for ‘don't know’ response on DTF andperson fit, and to detect the methods to reduce the effect of guessing inmultiple-choice test. Three forms of each test unit were prepared. The group 1 took forms containingitems with five responses and the group 2 took forms which had an additionalresponse of I don't know, while the group 3 took forms with ‘don't know’ responseoption and information of weight on the choice of ‘don't know’ option. The group3 data is processed to study the effect on weight by two methods to weight of‘1/number of alternative’ for ‘don't know’ response and not to. Person fit shows good result in the case of addition of a ‘don't know’ option. Also, even though tests are constructed by the same items, there are the effectsof ‘don't know’ response option and the information of differential scoring for‘don't know’ response and tests differently function.
김보영,박용규,박형서,노상필,정승현,이유선,이정우,이재환,최시완,정진옥,성인환 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1
Atherosclerosis is now viewed as an inflammatory disease of the vascular system. Expression of several chemokines, including monocyte chemoattractant protein(MCP)-1, MCP-4, RANTES(regulated on activation normal T-cell expressed and secreted), and interleukin-8(IL-8) are increased in human atherosclerotic plaques compared with normal vessels. They are involved in the pathogenesis of atherosclerosis and plaque rupture by activating and directing leukocytes into the atherosclerotic lesions. However, some are involved in homeostatic functions such as normal leukocyte traffic and growth regulation. SDF-la is a multi-functional cytokine that is involved in myelogenesis, hematopoiesis, angiogenesis and injured gastric mucosal regeneration in the gastric ulcer patient. SDF-la is recently shown to be highly expressed in atherosclerotic plaques and a potent platelet agonist. At least in high concentrations, SDF-la may mediate antiinflammatory and matrix stabilizing effects in unstable angina. Many studies are going on to know the function of SDF-la in coronary artery diseases. I investigated the difference of the plasma level of SDF-la between control group and coronary artery disease group. Total 75 subjects were enrolled. The diagnosis of coronary artery disease was confirmed in all patients by coronary angiography. Control subjects in this study were confirmed normal by coronary angiography. Clinical profile and risk factors were also reviewed. Control subjects in this study were 27 (M=10, F=17). Plasma for the study was collected before the angiography and centrifuged. SDF-la analysis was performed by ELISA. Plasma level of SDF-la is significantly increased in patients with stable angina(n=20) and unstable angina group(n=28) compared with healthy control group(n=27). the risk factors do not influence the plasma level of SDF-la in coronary artery diseases. In this study, plasma level of SDF-la is increased in patients with stable angina and unstable angina groups compared with healthy control group(P<0.05). the risk factors do not influence the plasma level of SDF-la in coronary artery diseases.
Lee, Si-Young,Chu, Sang-Mi,Lee, Si-Myung,Kim, Hyo-Jin,Cho, Hyun-Suk,Yu, Chang-Yeon,Kim, Jae-Kwang The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.2
A simple and sensitive method for determining indole-3-carbinol (I3C) and indole-3-acetonitrile (I3A) from Brassica vegetable was developed using high-performance liquid chromatography with fluorescence detection. The indolic glucosinolate as well as I3C and I3A concentrations were found to be significantly higher in Brassica rapa L. ssp. pekinensis than in B. juncea var. integrifolia.
Lee, Yu-Si,Jo, Seo-Hee,Cho, Sun-Duk,Kim, Gun-Hee,Kim, Yong-Mu,Lee, Dong-Ho,Park, Sun-Hee,Bae, Dong-Ho,Chung, Myung-Sub,Bahk, Gyung-Jin,Ha, Sang-Do The Korean Society for Applied Biological Chemistr 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.3
We established optimum washing and sanitizing conditions for fresh-cut lettuce using sodium hypochlorite to reduce microbial hazards. Reduction of microbial hazards, including total aerobic bacteria, Escherichoa coli, and Staphylococcus aureus at different sodium hypochlorite concentrations (0-500 ppm), immersion times (0-20 min), temperatures (0-30$^{\circ}C$), and washing times (0-4 min) was evaluated. The optimum washing and sanitizing conditions using sodium hypochlorite for lettuce were determined as immersion at more than 50 ppm for 1 min at 20$^{\circ}C$ and washing twice for 30 sec after dipping. Application of these optimum conditions will improve safety and added value of lettuce as a fresh-cut-food without detrimental effects on sensory characteristics.
Si-Wook Lee,Chang-Jin Yon,Jae-Ho Kim,Jung-Min Lee,Jae-Ho Lee,Yu-Ran Heo 대한정형외과학회 2024 Clinics in Orthopedic Surgery Vol.16 No.1
Background: To evaluate the degree of deformation in patients with ankle osteoarthritis (OA), it is essential to measure the threedimensional (3D), in other words, stereoscopic alignment of the ankle, subtalar, and foot arches. Generally, measurement of radiological parameters use two-dimensional (2D) anteroposterior and lateral radiographs in a weight-bearing state; however, computeraided 3D analysis (Disior) using weight-bearing cone-beam computed tomography (CBCT) has recently been introduced. Methods: In this study, we compared the 2D human radiographic method with a stereoscopic image in patients with ankle arthritis. We enrolled 57 patients diagnosed with OA (28 left and 29 right) and obtained both standing radiographs and weight-bearing CBCT. Patients were divided by the Takakura stage. The interclass correlation coefficient (ICC) for each result was confirmed. Results: On the ICC between 2D radiographs and 3D analysis, the tibiotalar surface angle and lateral talo-1st metatarsal angle showed a good ICC grade (> 0.6), while other parameters did not have significant ICC results. Three-dimension was superior to radiographs in terms of statistical significance. Conclusions: We demonstrated that 2D and stereoscopic images are useful for the diagnosis of OA. Our study also confirmed that the radiographic features affected by ankle OA varied. However, according to the results, the typical radiography is not sufficient to diagnose and determine a treatment plan for ankle OA. Therefore, the method of using 3D images should be considered.
Lee, Sang Yun,Kim, Si-Hoon,Nam, Yun Seok,Yu, Jae Choul,Lee, Seungjin,Kim, Da Bin,Jung, Eui Dae,Woo, Jeong-Hyun,Ahn, Seung-min,Lee, Sukbin,Choi, Kyoung-Jin,Kim, Ju-Young,Song, Myoung Hoon American Chemical Society 2019 NANO LETTERS Vol.19 No.2
<P>Organic-inorganic hybrid perovskites have been investigated extensively for use in perovskite-based solar cells and light-emitting diodes (LEDs) because of their excellent electrical and optical properties. Although the flexibility of perovskite LEDs has been studied through empirical methods such as cyclic bending tests, the flexibility of the perovskite layer has not been investigated systemically. Here, flexible and semitransparent perovskite LEDs are fabricated: a PEDOT:PSS anode and Ag nanowire cathode allow for flexible and semitransparent devices, while the use of a conjugated polyelectrolyte as an interfacial layer reduces the electron injection barrier between the cathode and the electron transport layer (SPW-111), resulting in enhanced device efficiency. Cyclic bending tests performed on the electrodes and in situ hole-nanoindentation tests performed on the constituent materials suggest that mechanical failure occurs in the perovskite MAPbBr<SUB>3</SUB> layer during cyclic bending, leading to a decrease in the luminance. Tensile properties of the MAPbBr<SUB>3</SUB> layer explain the critical bending radius (<I>r</I><SUB>b</SUB>) of the perovskite LEDs on the order of 1 mm.</P> [FIG OMISSION]</BR>
Si Young Lee,Sang Mi Chu,Si Myung Lee,Hyo Jin Kim,Hyun Suk Cho,Chang Yeon Yu,Jae Kwang Kim 한국응용생명화학회 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.2
A simple and sensitive method for determining indole-3-carbinol (I3C) and indole-3-acetonitrile (I3A) from Brassica vegetable was developed using high-performance liquid chromatography with fluorescence detection. The indolic glucosinolate as well as I3C a
Lee, Yu Sun,Kim, Kyoung Ju,Ahn, Seung Do,Choi, Eun Kyung,Kim, Jong Hoon,Lee, Sang-wook,Song, Si Yeol,Yoon, Sang Min,Kim, Young Seok,Park, Jin-hong,Cho, Byung Chul,Kim, Su Ssan BioMed Central 2013 Radiation oncology Vol.8 No.-
<P><B>Background</B></P><P>To evaluate the utility of the preoperative PET-CT using deformable image registration (DIR) in the treatment of patients with locally advanced breast cancer and to find appropriate radiotherapy technique for further adequate treatment of axillary nodal area.</P><P><B>Methods</B></P><P>Sixty-five breast cancer patients who had level II, III axillary or supraclavicular lymph node metastasis on <SUP>18</SUP>F-FDG PET-CT and received postoperative radiotherapy after modified radical mastectomy were enrolled. One radiation oncologist contoured normal organs (axillary vessels, clavicular head, coracoids process and humeral head) and involved lymph nodes on PET-CT and simulation CT slices. After contouring, deformable image registration of PET-CT on simulation CT was carried out. To evaluate the performance of the DIR, Dice similarity coefficient (DSC) and Center of mass (COM) were used. We created two plans, one was the historically designed three field plan and the other was the modified plan based on the location of axillary lymph node, and we compared the doses that irradiated the axillary lymph nodes.</P><P><B>Results</B></P><P>The DSCs for axillary artery, axillary vein, clavicular head, coracoids process and humeral head were 0.43 ± 0.15, 0.39 ± 0.20, 0.85 ± 0.10, 0.72 ± 0.20 and 0.77 ± 0.20, respectively. The distances between the COMs of axillary artery, axillary vein, clavicular head, coracoids process and humeral head in simulation CT and from PET-CT were 13.0 ±7.1, 20.2 ± 11.2, 4.4 ± 6.3, 3.7 ± 6.7, and 9.5 ± 25.0 mm, respectively. In the historically designed plan, only 57.7% of level II lymph nodes received more than 95% of prescribed dose and the coverage was improved to 70.0% with the modified plan (p < 0.01). For level III lymph nodes, the volumes received more than 95% of prescribed dose were similar in both plans (96.8 % vs 97.9%, p = 0.35).</P><P><B>Conclusion</B></P><P>Deformable image registration of PET-CT on simulation CT was helpful in the identification of the location of the preoperatively involved axillary lymph node. Historically designed three-field plan was not adequate to treat the axillary level II lymph node area. Novel treatment technique based on the location of axillary lymph node from PET-CT using DIR can result in more adequate coverage of nodal area.</P>
간암 환자에 합병된 Citrobacter braakii 패혈증 1례 보고
이해미,배성하,이수남,이정우,신아영,류시영,이수연,윤문희,한선영,한남익,이영석,유진홍 대한감염학회 2010 감염과 화학요법 Vol.42 No.3
Citrobacter species is a gram-negative bacilli that can cause opportunistic infections in immunocompromised hosts. Citrobacter braakii refers to the genomospecies 6 of the Citrobacter freundii complex. There are no detailed studies on infections caused by this newly identified specific genetic species in Korea. We herein report a case of a patient with hepatocellular carcinoma who, after undergoing transcatheter arterial chemoembolization, developed biloma which later progressed to C.braakii sepsis and did not respond to treatment. To our knowledge, this is the first reported case in Korea on C. braakii infection resulting in septic shock in a patient with malignancy in Korea.