• 대한가정학회지
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• 제42권9호
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• pp.135-147
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• 2004

The purposes of this study were to investigate the actual conditions and deal with the psychological characteristics of adolescent cellular phone addicts through the Minnesota Multiphase Personality Inventory (MMPI). The subjects of this study were 407 senior high school students (male 185, female 222) in 2nd grade in Daegu. The cellular phone addiction inventory (CPAI) was designed on the basis of an interview process, referring to the Young's Internet Addiction Self Diagnosis Scale. SPSS version 10.0 was employed for data analysis. The mean score of the adolescent addict group was significantly higher than the non-addict group in Scale Pd, Pa, Pt, Sc and Ma. This result indicates that the cellular phone addict group is likely to suffer from more serious pathological disorders than the non-addict group. The rate of addictive adolescents was significantly higher in the addict group than in the non-addict group in psychological problematic score ranges in Scale Sc (Schizophrenia) and Ma (Hypomania). The study result suggests that adolescents who addictively use a cellular phone will be more likely to show immaturity, instability, impulsive personality, excessive activities, and escapism.

• Child Health Nursing Research
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• 제9권1호
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• pp.85-95
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• 2003

Purpose: The purpose of this study was to compare psychosocial adjustment in children aged 4-11 years with cancer between on and off treatment. Method: The data was collected from parents of children with cancer through interviews with structured questionnaire at the pediatric outpatient department and inpatient ward of one university hospital located in Seoul. The instrument were the Child Behavior Check List(CBCL) developed by Achenbach(1991) and revised to standardize for Korean children by Oh et al(1997). Result: Total behavior problem score for children on treatment was greater than the score off treatment but there was no significant difference. Children on treatment reported higher levels of depression/anxiety, withdrawal, internalizing scores than children off treatment. Social competence score of children off treatment was greater than the score on treatment and the difference of school performance score of children between on and off treatment was not significant. The scores on the withdrawal, somatic complaints, social immaturity, internalizing scales in the cancer group including both on and off treatment was greater than normative findings in the general population. The scores on the school competence of children off treatment were lower than the norms for healthy children. Conclusion: Findings from this study support the importance of nursing interventions to facilitate the adjustment of children with cancer both on and off therapy.

• 대한불안의학회지
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• 제8권2호
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• pp.161-166
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• 2012

Though infanticide, killing the baby after birth of the neonate and denial of pregnancy, are very rare psychiatric disorder, they have been receiving a lot of social concerns. We report and review infanticide and denial of pregnancy administration in a 19 year-old adolescent with bipolar disorder and borderline personality disorder. Patients with a young age, cognitive immaturity, an unwanted child, hid the pregnancy facts were consistent with the results of previous studies. In addition, the patient's impulsivity and emotional instability is affecting infanticide. After inpatient care with pharmacotherapy (escitalopram 20mg, alprazolam 1.5 mg, clonazepam 0.5 mg, valproate sodium 1,100-1,300 mg, and quetiapine 100-400 mg) and supportive psychotherapy, and there were significant improvement of clinical symptoms.

• 한국전자통신학회논문지
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• 제15권4호
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• pp.747-752
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• 2020

철강 코일 또는 강판과 같은 특수물류는 경험이 많은 인력에 의존하여 물류가 선적되어 배치되고 있다. 따라서 인간의 실수나 경험의 부재로 인한 미숙함으로 인한 사고 발생 가능성이 매우 크다. 이러한 사고 발생 가능성을 사전에 방지하고, 특수물류에 요구되는 보안 적용사항과 화물의 안정성 여부, 그리고 정확한 적하목록 체크를 위한 운영 시스템에 대한 요구가 발생하고 있다. 또한, 선박의 균형을 맞추기 위한 정확한 선적 검수가 필요한 상황이다. 본 논문은 현재 시행하고 있는 선적 검수의 문제점들을 분석하고, 이를 개선하기 위한 WEB 기반 항만 특수물류 선적 검수 및 밸런싱 운영 시스템을 제안하였다.

• 경영정보학연구
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• 제3권1호
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• pp.3-18
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• 2001

The Internet is taking up every single life of us with a huge speed of growth. If the ideal market called 'perfect competition' in economics will ever come true in this digital world, the sellers won't be able to have monopolistic profits above the marginal cost any more, letting the resource allocation much more efficient. This paper attempts to test whether this theory is true in e-market as well through observing price differences between online and offline retailers of extremely homogeneous products, CDs. Since most results from previous research were supporting the inefficiency of e-market in price level, price adjustment, and especially price dispersion, this article designed the research methodology most carefully. The results of pervious works are partly due to the immaturity of the Internet market or due to the uniqueness of the American CD market, where oligopolistic market players are significantly dominant. The analysis of price data of 20 titles from 20 retailers for five weeks supports that online market is more efficient than offline market with statistical significance in all the three dimensions. We could conclude that the e-market is going much more efficient at least compared to the offline market and the more would it be unless the sellers resist and prevent comparison-shopping.

• Korean Circulation Journal
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• 제48권11호
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• pp.974-988
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• 2018

Embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), which are collectively called pluripotent stem cells (PSCs), have emerged as a promising source for regenerative medicine. Particularly, human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) have shown robust potential for regenerating injured heart. Over the past two decades, protocols to differentiate hPSCs into CMs at high efficiency have been developed, opening the door for clinical application. Studies further demonstrated therapeutic effects of hPSC-CMs in small and large animal models and the underlying mechanisms of cardiac repair. However, gaps remain in explanations of the therapeutic effects of engrafted hPSC-CMs. In addition, bioengineering technologies improved survival and therapeutic effects of hPSC-CMs in vivo. While most of the original concerns associated with the use of hPSCs have been addressed, several issues remain to be resolved such as immaturity of transplanted cells, lack of electrical integration leading to arrhythmogenic risk, and tumorigenicity. Cell therapy with hPSC-CMs has shown great potential for biological therapy of injured heart; however, more studies are needed to ensure the therapeutic effects, underlying mechanisms, and safety, before this technology can be applied clinically.

• Clinical and Experimental Pediatrics
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• 제65권4호
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• pp.182-187
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• 2022

We frequently encounter newborn infants with thrombocytosis in the neonatal intensive care unit. However, neonatal thrombocytosis is not yet fully understood. Thrombocytosis is more frequently identified in newborns and young infants, notably more often in those younger than 2 years than in older children or adults. The production of megakaryocytes (megakaryopoiesis) and platelets (thrombopoiesis) is mainly regulated by thrombopoietin (TPO). Increased TPO levels during infection or inflammation can stimulate megakaryopoiesis, resulting in thrombopoiesis. TPO concentrations are higher in newborn infants than in adults. Levels increase after birth, peak on the second day after birth, and start decreasing at 1 month of age. Initial platelet counts at birth increase with gestational age. Thus, preterm infants have lower initial platelet counts at birth than late-preterm or term infants. Postnatal thrombocytosis is more frequently observed in preterm infants than in term infants. A high TPO concentration and low TPO receptor expression on platelets leading to elevated plasma-free TPO, increased sensitivity of megakaryocyte precursor cells to TPO, a decreased red blood cell count, and immaturity of platelet regulation are speculated to induce thrombocytosis in preterm infants. Thrombocytosis in newborn infants is considered a reactive process (secondary thrombocytosis) following infection, acute/chronic inflammation, or anemia. Thrombocytosis in newborn infants is benign, resolves spontaneously, and, unlike in adults, is rarely associated with hemorrhagic and thromboembolic complications.

• Advances in pediatric surgery
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• 제1권2호
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• pp.122-132
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• 1995

Teratoma contains elements derived from all three embryonic germ layers and mature teratomas are entirely composed of mature differentiated tissues, while immature types always contain additional embryonic tissues of variable degree of immaturity, especially neuroepithelial elements. Twenty cases of teratoma in infancy and childhood were reviewed and the clinical features and pathologic findings including PCNA expression were studied. Sacrococcygeal teratomas were the most common type(45%), followed by retroperitoneal and ovarian teratomas. There was a predilection of females in a ratio of 4:1 and age distribution was most prevalent below the first year of age(45%). But in ovarian teratomas, the age at diagnosis was above 4 years of age in all cases. Serum alpha-fetoprotein levels were checked in 18 cases. In all mature teratomas and 1 of 5 immature teratomas, the levels were normal. But in 4 of 5 immature teratomas, the serum levels were elevated and progressively declined to normal range after mass excision. Radiologically, calcifications in tumor were found in 60.0% of teratomas and was higher in mature teratomas(69.2%) than immature teratomas(42.9%). Immunohistochemical staining for PCNA(proliferating cell nuclear antigen) was done in 16 cases and PCNA expression was higher in grade III immature teratomas than grade I and II. The operative modes were complete mass excisions. Five immature teratomas were treated with multiagent PEB(Bleomycin, Etoposide, Cisplatin) adjuvant chemotherapy, 3 tolerated well without significant complications, but in one case, severe bone marrow suppression was developed and died of sepsis. In conclusion, grade III immature teratoma showed higher PCNA expression than mature or lower grade immature teratoma, which suggests that chemotherapy after surgical excision may be effective modality for grade III immature teratoma. We think, however, multicenter study is necessary because of low incidence of immature teratoma.

• 한국산학기술학회논문지
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• 제14권12호
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• pp.6186-6195
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• 2013

본 연구의 목적은 현재 우리나라 결혼이민여성의 직업교육훈련과 취업지원에 관한 시행계획을 분석하여 분석결과를 도출함으로서 차기에 수립될 관련 계획과 시행계획의 수립과정과 내용에 반영되어야할 방향성을 제시하고자 하였다. 이를 위하여 건강가정기본계획, 다문화가족정책기본계획, 경력단절 여성 등의 경제활동촉진 기본계획에 제시된 직업교육훈련 시행계획을 분석대상으로 하였다. 분석방법은 닐 길버트와 폴테릴의 정책분석 방법론을 사용하였고, 분석결과는 첫째, 내일배움카드 취업성공패키지 특화과정의 미성숙 둘째, 인적자원개발시스템의 미흡 셋째, 정부 부처간 거버넌스의 미흡을 밝히고 이러한 결과를 토대로 제언을 하였다.

• 한국콘텐츠학회논문지
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• 제7권7호
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• pp.11-23
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• 2007

이동객체 응용은 빈번하게 변경되는 이동객체의 위치정보를 효과적으로 처리할 수 있는 색인구조를 필요로 한다. 이동객체의 위치를 색인하기 위해 제안된 색인기법들은 대부분 R-트리를 기반으로 하고 있다. R-트리는 변경보다는 검색 연산의 성능에 초점이 맞추어진 색인구조이어서 잦은 변경을 다뤄야 하는 이동객체의 응용에 적합하지 않은 측면이 있다. 일부 연구에서는 R-트리의 변경 연산 성능을 향상시키기 위한 연구를 진행한 바 있다. 하지만, 변경 연산의 성능이 개선되었다 하더라도 R-트리가 기본적으로 내재하고 있는 동시성 제어기법 문제(동시성 제어 기법의 비효율성과 안정성) 때문에 R-트리 기반의 색인기법을 실제 응용에서 쓰는 데는 여전히 문제가 있다. 이 논문에서는 B+-트리와 힐버트 곡선 (Hilbert Curve)를 기반으로 하는 새로운 이동객체 색인 기법을 제안한다. 기존에 제안된 B+-트리 기반의 색인기법과는 다르게 이 논문에서는 힐버트 커브의 해상도(또는 차수, order)를 객체의 분포도와 개수에 따라서 가변적으로 적용하는 방법을 제안한다. 실험을 통해서 제안하는 색인 기법이 응답시간과 처리율 측면에서 기존 색인기법에 비해 우수함을 보인다.