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JongIl Park,ShiHa Shim,Myeongmi Lee,YoungEun Jung,TaeWon Park,SeonHee Park,YongJin Im,JongChul Yang,YoungChul Chung,SangKeun Chung 대한신경정신의학회 2014 PSYCHIATRY INVESTIGATION Vol.11 No.3
Objective-The purpose of this study is to examine the validity of primary screening tools for attention deficit hyperactivity disorder (ADHD) in a community-based sample of children using the Korean version of the Child Behavior Checklist (K-CBCL) and the Korean version of the ADHD Rating Scale (K-ARS). Methods-A large-scale community-based study for ADHD screening was conducted in the Jeollabuk province in the Republic of Korea. In 2010–2011, we surveyed a total of 49,088 first- and fourth-grade elementary school students. All of the participants in this study were assessed by the K-ARS-Parent version (K-ARS-P) and the K-ARS-Teacher version (K-ARS-T) as the primary screening instruments. The Diagnostic Interview Schedule for Children Version IV (DISC-IV) was used for confirming the diagnosis of ADHD. DISC-IV was administered to subjects who received top 10% scores in the K-ARS-P or K-ARS-T tests. Results-Of the 3,085 subjects who completed the DISC-IV, 1,215 were diagnosed as having ADHD. A reasonable level of sensitivity, specificity, and negative predictive value were obtained when the total K-ARS-P scores were ≥90th percentile. The positive predictive value and specificity increased significantly when the total K-ARS-P scores were ≥90th percentile, T scores were ≥60 in the attention problems of K-CBCL, and T scores were ≥63 in the total problems of K-CBCL Conclusion-These results suggested that the K-ARS-P could effectively serve as a primary screening tool to identify elementary school children with ADHD in the community. Also, there might be some increment in the effectiveness of K-ARS-P when combined with KCBCL-A and K-CBCL-T as a secondary screening tool.
SMOOTHLY EMBEDDED RATIONAL HOMOLOGY BALLS
Park, Heesang,Park, Jongil,Shin, Dongsoo Korean Mathematical Society 2016 대한수학회지 Vol.53 No.6
In this paper we prove the existence of rational homology balls smoothly embedded in regular neighborhoods of certain linear chains of smooth 2-spheres by using techniques from minimal model program for 3-dimensional complex algebraic variety.
JongIl Park,JongChul Yang,Sangkeun Chung 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.6
Little is known about the risk factors for the fear of falling in elderly Korean individuals. Thus, the present study aimed to investigate the risk factors for fear of falling in a representative elderly population of over 10,000 individuals aged 65 years and older. A multivariate multinomial analysis revealed that the risk factors associated with a severe fear of falling were being female [odds ratio (OR)=4.396], older age (OR=5.550 for those aged ≥85 years), lower level of education (OR=0.719 for those with ≥13 years of schooling), chronic illness (OR=2.788 for those with more than three chronic illnesses), poor subjective health (OR=6.268), functional impairments (OR=2.340), a history of falling (OR=7.062), and depression (OR=1.774). The ORs for each of these risk factors were particularly high in participants with a severe fear of falling. Particularly, a history of falling and/or poor subjective health status had strong independent associations with the fear of falling. The present findings may help health care professionals identify individuals that would benefit from interventions aimed at reducing the fear of falling.
SIMPLY CONNECTED COMPLEX SURFACES OF GENERAL TYPE WITH p<sub>g</sub> = 0 AND K<sup>2</sup> = 1, 2
Park, Heesang,Park, Jongil,Shin, Dongsoo,Yun, Ki-Heon Korean Mathematical Society 2017 대한수학회논문집 Vol.32 No.3
We construct various examples of simply connected minimal complex surfaces of general type with $p_g=0$ and $K^2=1,2$ using ${\mathbb{Q}}$-Gorenstein smoothing method.
SURFACES OF GENERAL TYPE WITH p<sub>g</sub> = 1 AND q = 0
Park, Heesang,Park, Jongil,Shin, Dongsoo Korean Mathematical Society 2013 대한수학회지 Vol.50 No.3
We construct a new family of simply connected minimal complex surfaces of general type with $p_g$ = 1, $q$ = 0, and $K^2$ = 3, 4, 5, 6, 8 using a $\mathbb{Q}$-Gorenstein smoothing theory.
Milnor fibers and symplectic fillings of quotient surface singularities
Park, Heesang,Park, Jongil,Shin, Dongsoo,Urzú,a, Giancarlo Elsevier 2018 Advances in mathematics Vol.329 No.-
<P><B>Abstract</B></P> <P>We determine a one-to-one correspondence between Milnor fibers and minimal symplectic fillings of a quotient surface singularity (up to diffeomorphism type) by giving an explicit algorithm to compare them mainly via techniques from the minimal model program for 3-folds and Pinkham's negative weight smoothing. As by-products, we show that:</P> <P>– Milnor fibers associated to irreducible components of the reduced versal deformation space of a quotient surface singularity are not diffeomorphic to each other with a few obvious exceptions. For this, we classify minimal symplectic fillings of a quotient surface singularity up to diffeomorphism.</P> <P>– Any symplectic filling of a quotient surface singularity is obtained by a sequence of rational blow-downs from a special resolution (so-called the maximal resolution) of the singularity, which is an analogue of the one-to-one correspondence between the irreducible components of the reduced versal deformation space and the so-called <I>P</I>-resolutions of a quotient surface singularity.</P>