Bi-factor MIRT True-Score Equating for Testlet-Based Tests

이규민(Gue min Lee),Won Chan Lee,Michael J Kolen,박인용(In Yong Park),Dong In Kim,Ji Seung Yang 한국교육평가학회 2015 교육평가연구 Vol.28 No.2

Lee and Lee (2014) proposed bi-factor multidimensional item response theory model (BFM) "observed-score" equating procedures. The main purposes of this study were to develop BFM "true-score" equating procedures, and to investigate applicability of the proposed procedures with actual data. Eight equating methods (including both true- and observed-score) based on dichotomous IRT (2-parameter logistic model: 2PL), polytomous IRT (graded response model: GRM), testlet response model (TRM), and BFM were compared with target equipercentile equating. Data for this study were from the Reading Comprehension test for a large-scale state assessment program, which consisted of several passages and corresponding groups of items. True- and observed-score equating methods based upon 2PL and BFM produced similar equating results. The GRM true- and observed-score equating methods provided equating results somewhat different from others, and more similar to the target equipercentile equating. Lee와 Lee(2014) 연구는 혼합형 검사에서의 bi-factor 다차원 문항반응모형을 적용한 IRT "관찰점수" 동등화 절차를 제안하였다. 이 연구는 Lee와 Lee(2014) 연구의 추수연구로 단위검사를 대상으로 bi-factor 다차원 문항반응모형을 적용한 IRT "진점수" 동등화 절차를 제안하고, 그 적용 가능성을 실제 자료를 이용하여 탐색하고자 하였다. 이를 위해 단위검사로 구성된 대규모 독해 검사 자료를 이용하여, 2모수 로지스틱 모형(2-parameter logistic model: 2PL), 등급반응모형(graded response model: GRM), 단위검사모형(testlet response model: TRM), bi-factor 모형(bi-factor model: BFM)을 적용하였으며, 관찰점수 및 진점수 동등화를 시행하여 총 8개의 동등화 방법을 적용하고, 산출된 결과를 동백분위 동등화 결과와 비교하였다. 연구 결과, 2PL과 BFM을 적용한 관찰점수 및 진점수 동등화는 유사한 결과를 산출하였으며, GRM을 적용한 관찰점수 및 진점수 동등화 방법은 다른 방법들과 다소 차이를 보이는 결과를 산출하였고, 비교 기준이 된 동백분위 동등화 결과와 보다 유사한 결과를 보였다.

심혈관계 질환으로 관상질환 집중치료실에 입원한 환자들의 혜후 측정을 위한 APACHEⅢ점수 체계의 임상적 유용성

이공섭,이창선,최현주,홍종서,강지향,김도형,이민영,오인균,김병엽,김상억,김학찬,한승혜,이재용,지영우,안경주 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

췌장 선방세포암 1예

이화정,지준호,박승찬,박정철,최은정,서혜진,이원식,이정림,배병조,손경락,이경희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Acinar cell carcinoma is a rare tumor that represents 1~2% of al1 pancreatic cancers. Clinical and radiologic findings are inconclusive in this disease Acinar cell carcinoma is characterized by rapid progression and early metastasis, which lead to its poor prognosis. A 41-year-o1d man was admitted to our hospital for abdominal pain. Abdominal computed tomography (CT) and positron emission tomography-computed tomography (PET-CT) showed a splenic mass, which was being invaded by a pancreatic tail mass and which had increased ^(18)F-fluorodeoxyglucose (FDG) uptake Primary radical distal pancreatectomy and splenectomy were performed. Pathologic findings revealed an acinar cell carcinoma of the Pancreas The patient underwent a total gastrectomy three months later because of gastric recurrence Four months later, multiple hepatic metastases were discovered, and the patient underwent a left hepatectomy During treatment with capecitabine, there was no evidence of tumor progression for 14 months. We report a case of metastatic pancreatic acinar cell carcinoma, which did not progress for an extended period while the patient was being treated with capecitabme.

무선 애드 혹 기반 액티브네트워크상에서 QoS지원에 관한 연구

李基源,裵振勝,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this thesis, we propose a QoS supporting method on wireless ad hoc-based active network for improving reliability. On the loss of route path, the existing DSR routing protocol has several problems with wireless network communication because of decease of data reception rate and increase of network load. The proposed method improves reliability of data transfer by using functions of active network. That is, by using functions of active nodes and active packets, the proposed method supports QoS with reservation transfer method that saves data packets on transfer at intermediate nodes with lost path and then re-transmit the packets after route reconfiguration.

지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

부신피질 자극호르몬 단독결핍 1례

박경식,이승현,최석영,박태규,이동화,이찬우,정성복,이인규 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

부신피질 자극호르몬 단독결핍은 국내에서 7례만이 보고된 희귀 질환이며 병인 및 경과 등 아직 불분명한 측면이 많다. 이는 질환지체의 희귀성도 있지만 치료후 자연경과에 대한 장기적인 추적검사가 이루어진 경우가 드물기 때문이기도 하다. 저자들은 비특이적인 전신증상을 주소로 내원한 폐경기후의 56세 여자 환자에서 자가면역질환의 증거없이 고프로릭틴혈증을 보인 부신피질 자극호르몬 단독결핍 1례를 경험하고 1년간의 부신피질호르몬 대치요법후 추적검사를 실시하였기에 문헌 고찰과 함께 보고하는 바이다. Isolated ACTH deficiency is a rare disorder which shows secondary adrenal insufficiency with normal states of other pituitary hormones. A 56-year-old postmenopausal woman complaining general weakness and intermittent mental confusion presented negligible serum cortisol and ACTH level with hyperprolactinemia and mild hyponatremia. Rapid ACTH stimulation test did not show significant increase of serum cortisol level. Combined pituitary stimulation test showed negligible response of cortisol and ACTH, and slightly decreased response of prolactin and gonadotropin. But the responses of TSH and GH were normal. There was no evidence of organic pituitary of hypothalamic lesion in brain MRI and antithyroid autoantibody was not detected in serum. After receiving 12 months of glucocorticoid replacement therapy, she skipped the medicine for 3 weeks and we performed follow-up endocrinologic tests. Serum ACTH and cortisol level was also negligible and prolonged ACTH simulation test showed normal response of serum cortisol. CRF stimulation test showed no response of serum ACTH. Basal prolactin level was decreased to near normal and combined pituitary stimulation test showed normal response of prolactin with slightly blunted response of TSH and GH. We concluded that the case was nonautoimmune origined isolated ACTH deficiency which was accompanied by hyperprolactinemia and resultant deficiency of gonadotropin, so we report this case with review of literatures.

원발성 후복막 점액낭샘암종 1예

지준호,이화정,박승찬,박정철,최은정,서혜진,이원식,이정림,배병조,손경락,이경희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Primary retroperitoneal mucinous cystadenocarcinoma is a very rare malignancy, and little is known concerning its Pathogenesis, optimal treatment, and prognosis. A 29-year-o1d pregnant woman (21 weeks) Presented with abdominal discomfort CA 19-9, CA 125, and CEA were normal Abdominal CT scanning revealed a 19x15x13 cm retropentoneal tumor Exploratory laparotomy and tumor excision were performed. Mucinous retropentoneal implants were removed as completely as possible Histologically, the tumor showed focal areas of capsular invasion, but free resection margins The uterus and both ovaries were normal in appearance No adjuvant therapy was pursued. Six months later, Peritoneal and bilateral ovarian metastases were discovered. Hence, we report the details of this case of primary retroperitoneal mucinous Cystadeno-carcinoma and present a review of the literature.

급성 B형 간염의 회복 후 말초혈액 단핵구에서의 HBV DNA검출

명승재,이영상,김형건,이근찬,박능화,정영화,서동진 大韓消化器病學會 1997 大韓消化器病學會誌 Vol.29 No.1

사무직 근로자의 경력개발 지원 현황 및 요구 분석 : 중소기업과 대기업의 비교를 중심으로

이찬,정철영,나승일,김진모,강두천 한국농업교육학회 2008 농업교육과 인적자원개발 Vol.40 No.2

이 연구의 목적은 우리나라 대기업 및 중소기업의 사무직 근로자 경력개발 지원 현황 및 교육 요구를 분석하고 경력개발 지원의 필요성 및 시사점을 도출하는데 있다. 따라서, 기업체 인사교육담당지들을 대상으로 사무직 근로자 직무교육 현황, 사무직 근로자의 역량수준 및 요구, 직무교육이 필요한 사무직의 업무활동분야 국가차원에서의 시무직 분야별 교육과정 개발 요구 등에 대한 요구분석을 실시하였다. 구체적인 연구 결과는 다음과 같다. 첫째, 대부분의 기업은 전문역량을 보유한 근로자를 선호하는 것으로 나타났다. 둘째, 사무직 근로자의 경우 직위가 올라갈수록 전문가 수준에 근접한 직무역량이 필요한 것으로 나타났다. 셋째, 전체 응답기업의 74.9%가 직무교육을 실시하고 있다고 응답하였고 근로자 1인당 연평균 직무교육 시간은 49시간으로 나타났다. 넷째, 전체 응답기업의 64.8%는 외부 위탁교육을 실시하는 것으로 나타났으며, 특히 중소기업이 대기업에 비해 위탁교육 의존도가 더 높은 것으로 드러났다. 다섯째, 승계계획(succession plan)은 전체 응답기업의 25.7%만이 도입 · 운영하고 있는 것으로 나타났다. 여섯째, 국가가 사무직 근로자의 직무능력 향상을 위해 교육과정을 개발하는 것에 대해서는 전체 응답기업의 69.7%가 긍정적으로 인식하였고, 가장 우선적으로 개발해야 할 교육과정으로는 전체 응답기업의 60.8%가 인사 · 노무 분야를 선정하였다. 마지막으로, 국가가 사무직 근로자를 대상으로 한 교육과정을 개발할 경우 전체 응답기업의 58.5%가 해당 교육과정에 근로자를 참여시킬 것이라고 응답하였다. 이를 통하여 ①사무직 근로자들의 일반역량과 전문역량을 모두 강화할 수 있는 전략적 접근의 필요성,②중소기업을 중심으로 사무직 근로자의 직무역량을 강화할 수 있는 직무 교육 확대 및 지원방안 요구, ③경력개발제도의 도입 · 운영의 필요성, ④국가가 가장 우선적으로 개발해야할 교육과정으로 도출된 인사 · 노무, 마케팅, 회계 분야에 있어서는 직무분석, 환경분석, 학습과제 분석 등의 실시를 제언하였다. The purpose of this study was to analyze training needs and current situation of career development of office workers in small-medium sized enterprises and large corporations to find initiatives for supporting career development in Korea. The survey was conducted to HR practitioners in small-medium sized enterprises and large corporations about training situation of office workers, competency level of office workers, areas in need of training, and needs of curriculum development from government subsidized programs. Findings from this study was as follows. First, most of the companies prefer workers with job professional competencies. Second, expert level job competency was required for office workers as they got promoted. Third, 74.9% of responding companies was conducting job training and average training hours per year for workers were 49 hours. Forth, 64.8% of responding companies was conducting outsourcing training. Especially for small and medium sized companies, they tended to more rely on outsourcing training. Fifth, only 25.7% of responding companies was conducting succession plan. Sixth, 69.7% of responding companies reacted positively about developing government-directed training program. Finally, if the Korean government develops training curriculum for office workers, 58.5% of the responding companies answered that they would have their employees take the training programs. In short, ① Needs of strategic approach for strengthening general competencies and professional competencies for office workers, ② Request of supporting policy for strengthening job competencies of office workers focusing on small and medium sized enterprises, ③ Neccessity of introduction and operation of career development system, ④ Operating task analysis, job analysis, environment analysis in the field of HR, Labor, Marketing, Accounting which needs to be developed in advance by the Korean government were suggested.

분뇨처리장의 공정개선에 의한 처리효율 향상에 관한 연구

이찬원,김승현,김창수,문성원,전홍표,윤종섭 한국환경과학회 2004 한국환경과학회지 Vol.13 No.6

There is a need to improve the efficiency of the existing sanitary treatment facilities, because the effluent standard becomes more stricter and septic sludge increased. Thus, operating processes of sanitary treatment system in M city changed with installation of additional facilities. Process modifications were as follows: Dilution water was added to the next process after primary aeration tank. Some secondary sedimentation sludge was recycled to primary aerator so that most of the organics were stabilized in primary aeration tank under automatic control of dissolved oxygen. The line of effluent from dewatering process flowing to the activated sludge tank was changed to the primary aerator. The primary sedimentation sludge line was linked to a thickener. Polymer was added to the activated sludge tank. The effluent of primary aerator and aerobic digester was recycled from the 5th to the 1st sector. As consequencies of above process modifications, the improvement of removal efficiency was achieved as BOD 54%, COD 42%, SS 61%, T-N 39%, and T-P 12%, respectively.