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Your search keyword '"Sung, Y. A."' showing total 62 results
Start Over Author "Sung, Y. A." Publisher springer science and business media llc
62 results on '"Sung, Y. A."'

2. On time and frequency-varying Okun’s coefficient: a new approach based on ensemble empirical mode decomposition

Author

Myeong Jun Kim, Stanley I. M. Ko, and Sung Y. Park

Subjects
Statistics and Probability, Working hours, Economics and Econometrics, Series (mathematics), 05 social sciences, Magnitude (mathematics), Okun's law, Time horizon, Regression, Hilbert–Huang transform, Mathematics (miscellaneous), 0502 economics and business, Statistics, 050207 economics, Social Sciences (miscellaneous), 050205 econometrics, Mathematics
Abstract

This study revisits the time-varying Okun’s law, using US data over the period 1948Q2–2015Q3. The estimated Okun’s coefficients are negative over most of the time horizon and the absolute values of the time-varying Okun’s coefficient is getting smaller. The short- and long-term fluctuations of the time-varying Okun’s law are reconstituted using the ensemble empirical mode decomposition (EEMD) method, and their determinants are analyzed. The empirical results show that the number of working hours and utilization are important factors affecting the long- and short-term fluctuations of the time-varying Okun’s coefficients. More specifically, the short-term fluctuations of the working hours and utilization have significant positive and negative effects, respectively, on the magnitude of short-term fluctuations of the time-varying Okun’s coefficients. It is also found that the long-term fluctuation of the estimated time-varying Okun’s coefficient has a very similar pattern to the detrended real GDP series. We also show the estimated regression estimates are very stable with respect to the considered EEMD method using a simple simulation.

Published
2020

3. Information theoretic approaches to income density estimation with an application to the U.S. income data

Author

Anil K. Bera and Sung Y. Park

Subjects
Organizational Behavior and Human Resource Management, Stylized fact, Sociology and Political Science, business.industry, Principle of maximum entropy, 05 social sciences, Distribution (economics), Density estimation, Family income, Personal income, Economic inequality, 0502 economics and business, Econometrics, 050207 economics, business, General Economics, Econometrics and Finance, 050205 econometrics, Public finance
Abstract

The size distribution of income is the basis of income inequality measures which in turn are needed for evaluation of social welfare. Therefore, proper specification of the income density function is of special importance. In this paper, using information theoretic approach, first, we provide a maximum entropy (ME) characterization of some well-known income distributions. Then, we suggest a class of flexible parametric densities which satisfy certain economic constraints and stylized facts of personal income data such as the weak Pareto law and a decline of the income-share elasticities. Our empirical results using the U.S. family income data show that the ME principle provides economically meaningful and a very parsimonious and, at the same time, flexible specification of the income density function.

Published
2018

6. Genome-wide meta-analysis of variant-by-diuretic interactions as modulators of lipid traits in persons of European and African ancestry

Author

de las Fuentes, L., primary, Sung, Y. J., additional, Sitlani, C. M., additional, Avery, C. L., additional, Bartz, T. M., additional, Keyser, C. de, additional, Evans, D. S., additional, Li, X., additional, Musani, S. K., additional, Ruiter, R., additional, Smith, A. V., additional, Sun, F., additional, Trompet, S., additional, Xu, H., additional, Arnett, D. K., additional, Bis, J. C., additional, Broeckel, U., additional, Busch, E. L., additional, Chen, Y.-D. I., additional, Correa, A., additional, Cummings, S. R., additional, Floyd, J. S., additional, Ford, I., additional, Guo, X., additional, Harris, T. B., additional, Ikram, M. A., additional, Lange, L., additional, Launer, L. J., additional, Reiner, A. P., additional, Schwander, K., additional, Smith, N. L., additional, Sotoodehnia, N., additional, Stewart, J. D., additional, Stott, D. J., additional, Stürmer, T., additional, Taylor, K. D., additional, Uitterlinden, A., additional, Vasan, R. S., additional, Wiggins, K. L., additional, Cupples, L. A., additional, Gudnason, V., additional, Heckbert, S. R., additional, Jukema, J. W., additional, Liu, Y., additional, Psaty, B. M., additional, Rao, D. C., additional, Rotter, J. I., additional, Stricker, B., additional, Wilson, J. G., additional, and Whitsel, E. A., additional

Published
2019
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7. Promoting improved social support and quality of life with the CenteringPregnancy® group model of prenatal care

Author

Robin O Winter, Sridevi Kandula, Sung Y Chae, and Mark H Chae

Subjects
Postpartum depression, 030219 obstetrics & reproductive medicine, business.industry, Breastfeeding, Obstetrics and Gynecology, Prenatal care, medicine.disease, 03 medical and health sciences, Psychiatry and Mental health, Social support, 0302 clinical medicine, Quality of life (healthcare), medicine, 030212 general & internal medicine, business, Breast feeding, Postpartum period, Clinical psychology, Cohort study
Abstract

This prospective cohort study compared women participating in CenteringPregnancy® group prenatal care (N = 120) with those in standard individual care (N = 221) to determine if participation in Centering was associated with improvements in perceived social support and quality of life, with concomitant decreases in screens of postpartum depression and improvements in breastfeeding rates. Participants completed surveys at the onset of prenatal care, in the late third trimester and in the postpartum period. Centering participants had higher scores of perceived social support from friends after participating in group care (p

Published
2016

9. Determinants of Housing Prices in Hong Kong: A Box-Cox Quantile Regression Approach

Author

Hyung-Gun Kim, Kwong-Chin Hung, and Sung Y. Park

Subjects
Economics and Econometrics, business.industry, Financial economics, Distribution (economics), Real estate, Quantile regression, Urban Studies, Accounting, Economics, Econometrics, Predictability, Gross floor area, business, Transaction data, Finance, Financial services, Quantile
Abstract

This paper analyzes the determinants of housing prices in Hong Kong by using property transaction data of condominium units from Taikoo Shing, one of the largest real estate properties in Hong Kong. We use a hedonic pricing model for the empirical analysis and estimate the model by using the Box-Cox quantile regression method. The empirical results show that this method provides a more comprehensive description of housing price determinants. Housing prices and characteristics have a nonlinear relationship, and this relationship varies across all quantiles. In addition, the response of housing prices to various housing characteristics varies across quantiles. For example, an increase in the size of the gross floor area is more valued at higher quantiles. Other variables have differential effects on housing prices across the distribution of housing prices. We also perform a simple simulation for model predictability and show that our model outperforms other models which have been frequently used in the previous studies.

Published
2014

11. Metabolic enzyme PFKFB4 activates transcriptional coactivator SRC-3 to drive breast cancer

Author

Dasgupta, Subhamoy, primary, Rajapakshe, Kimal, additional, Zhu, Bokai, additional, Nikolai, Bryan C., additional, Yi, Ping, additional, Putluri, Nagireddy, additional, Choi, Jong Min, additional, Jung, Sung Y., additional, Coarfa, Cristian, additional, Westbrook, Thomas F., additional, Zhang, Xiang H.-F., additional, Foulds, Charles E., additional, Tsai, Sophia Y., additional, Tsai, Ming-Jer, additional, and O’Malley, Bert W., additional

Published
2018
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12. Prediction of high-grade squamous intraepithelial lesions using the modified Reid index

Author

Dae G. Hong, Young Lae Cho, Yoon Soon Lee, Won Joon Seong, and Sung Y. Kim

Subjects
Pathology, medicine.medical_specialty, Biopsy, Reid index, Sensitivity and Specificity, High-Grade Squamous Intraepithelial Lesions, Lesion, medicine, Humans, Papillomaviridae, Grading (tumors), Cervix, Colposcopy, medicine.diagnostic_test, business.industry, Hematology, General Medicine, Uterine Cervical Dysplasia, medicine.disease, Squamous intraepithelial lesion, medicine.anatomical_structure, Oncology, DNA, Viral, Female, Surgery, Radiology, medicine.symptom, business
Abstract

Colposcopic grading provides an objective and meaningful guide to histologic severity and neoplastic progression of squamous intraepithelial lesions of the cervix. The objective of this study was to develop a more efficient and convenient method to overcome procedural complexities involved with the traditional Reid index in prediction of high-grade squamous intraepithelial lesion (HSIL). The Reid index uses four colposcopic signs (margin, color, vessel, and iodine staining). The proposed modified Reid index system specifically incorporates the location of the lesion within the transformation zone in place of iodine staining. Three hundred women with suspected or abnormal cytologies or abnormal cervicographic findings were evaluated by colposcopy, directed biopsy, and HPV testing by the Hybrid Capture II method, which detects high-risk HPV DNA types. The sensitivity of high-risk HPV testing for detecting HSIL was 94.4%, the specificity was 65.0%, the positive predictive value was 75.5%, and the negative predictive value was 91.0%. The results of the colposcopic impression using the modified Reid index were superior to HPV testing. The sensitivity, specificity, positive predictive value, and negative predictive value of the colposcopic impression for detecting HSIL were 91.3, 92.9, 93.6, and 90.3% respectively. These results strongly indicate that the modified Reid index can accurately predict the histologic grade of squamous intraepithelial lesions of the cervix and can be applied easily and objectively in clinical practice without affecting the diagnostic accuracy of the traditional Reid index.

Published
2010

13. Terwilliger algebras of wreath products of one-class association schemes

Author

Sung Y. Song, Rie Tanaka, and Gargi Bhattacharyya

Subjects
Combinatorics, Discrete mathematics, Class (set theory), Algebra and Number Theory, Association scheme, Wreath product, Discrete Mathematics and Combinatorics, Algebra over a field, Mathematics
Abstract

In this paper, we study the wreath product of one-class association schemes K n =H(1,n) for n?2. We show that the d-class association scheme $K_{n_{1}}\wr K_{n_{2}}\wr \cdots \wr K_{n_{d}}$ formed by taking the wreath product of $K_{n_{i}}$ (for n i ?2) has the triple-regularity property. Then based on this fact, we determine the structure of the Terwilliger algebra of $K_{n_{1}}\wr K_{n_{2}}\wr \cdots \wr K_{n_{d}}$ by studying its irreducible modules. In particular, we show that every non-primary module of this algebra is 1-dimensional.

Published
2009

14. Character tables of the association schemes coming from the action of G 2(q) on hyperplanes of type O 6 ε (q)

Author

Eiichi Bannai, Sung Y. Song, and Hiromichi Yamada

Subjects
Set (abstract data type), Combinatorics, Discrete mathematics, Computational Mathematics, Association scheme, Character table, Hyperplane, Group of Lie type, Applied Mathematics, Orthogonal group, Type (model theory), Commutative property, Mathematics
Abstract

The character tables of the commutative association schemes coming from the action of the Chevalley group G2(q) on the set Ωe of hyperplanes of type O6e(q) in the seven dimensional orthogonal geometry over GF(q) related to the orthogonal group O7(q) are constructed by modifying the character tables of the association schemes obtained from the action of O7(q) on Ωe.

Published
2008

16. Fusion Relation in Products of Association Schemes

Author

Sung Y. Song

Subjects
Fusion, Relation (database), Theoretical Computer Science, Combinatorics, Algebra, Mathematics::Group Theory, Matrix (mathematics), Association scheme, Character table, Wreath product, Scheme (mathematics), Discrete Mathematics and Combinatorics, Direct product, Mathematics
Abstract

Fusion relations between the association schemes obtained by direct product and wreath product are established via a study of their matrix representations. The character table of the scheme obtained by the wreath product is described and some algebraic properties of the products are derived.

Published
2002

18. [Untitled]

Author

Ji-Won Yang, Jong Moon Park, Sung Y. Yoon, and Won Jae Choi

Subjects
chemistry.chemical_classification, Chromatography, biology, Ginkgo biloba, Flavonoid, biology.organism_classification, Applied Microbiology and Biotechnology, Biochemistry, chemistry.chemical_compound, Adsorption, chemistry, Selective adsorption, Ginkgoales, Methanol, Kaempferol, Quercetin
Abstract

A simple purification method has been developed in which flavonoid compounds are selectively adsorbed onto a polycarboxyl ester resin (XAD-7) from methanol extract of ginkgo leaves. When 1.0 g dried gingko leaves was extracted with 100 ml of methanol, about 98% of total flavonoid compounds was recovered by selective adsorption. The pH did not affect the adsorption of flavonoids but at high pH the chemical structure of flavonoids was changed and the adsorption decreased to almost zero. As the solution polarity played a key role in the selective adsorption, the amount of water added to the methanol extract was critical for the recovery and loading of flavonoids. Using standard flavonoids, kaempferol and quercetin, the optimal water content was 80% and the recovery was 80% with 10 g of resin dosage/l.

Published
1997

20. Genome-wide association studies suggest sex-specific loci associated with abdominal and visceral fat

Author

Sung, Y J, primary, Pérusse, L, additional, Sarzynski, M A, additional, Fornage, M, additional, Sidney, S, additional, Sternfeld, B, additional, Rice, T, additional, Terry, J G, additional, Jacobs, D R, additional, Katzmarzyk, P, additional, Curran, J E, additional, Jeffrey Carr, J, additional, Blangero, J, additional, Ghosh, S, additional, Després, J-P, additional, Rankinen, T, additional, Rao, D C, additional, and Bouchard, C, additional

Published
2015
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21. The spliceosome is a therapeutic vulnerability in MYC-driven cancer

Author

Hsu, Tiffany Y.-T., primary, Simon, Lukas M., additional, Neill, Nicholas J., additional, Marcotte, Richard, additional, Sayad, Azin, additional, Bland, Christopher S., additional, Echeverria, Gloria V., additional, Sun, Tingting, additional, Kurley, Sarah J., additional, Tyagi, Siddhartha, additional, Karlin, Kristen L., additional, Dominguez-Vidaña, Rocio, additional, Hartman, Jessica D., additional, Renwick, Alexander, additional, Scorsone, Kathleen, additional, Bernardi, Ronald J., additional, Skinner, Samuel O., additional, Jain, Antrix, additional, Orellana, Mayra, additional, Lagisetti, Chandraiah, additional, Golding, Ido, additional, Jung, Sung Y., additional, Neilson, Joel R., additional, Zhang, Xiang H.-F., additional, Cooper, Thomas A., additional, Webb, Thomas R., additional, Neel, Benjamin G., additional, Shaw, Chad A., additional, and Westbrook, Thomas F., additional

Published
2015
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27. Genome-wide meta-analyses of smoking behaviors in African Americans

Author

David, S P, primary, Hamidovic, A, additional, Chen, G K, additional, Bergen, A W, additional, Wessel, J, additional, Kasberger, J L, additional, Brown, W M, additional, Petruzella, S, additional, Thacker, E L, additional, Kim, Y, additional, Nalls, M A, additional, Tranah, G J, additional, Sung, Y J, additional, Ambrosone, C B, additional, Arnett, D, additional, Bandera, E V, additional, Becker, D M, additional, Becker, L, additional, Berndt, S I, additional, Bernstein, L, additional, Blot, W J, additional, Broeckel, U, additional, Buxbaum, S G, additional, Caporaso, N, additional, Casey, G, additional, Chanock, S J, additional, Deming, S L, additional, Diver, W R, additional, Eaton, C B, additional, Evans, D S, additional, Evans, M K, additional, Fornage, M, additional, Franceschini, N, additional, Harris, T B, additional, Henderson, B E, additional, Hernandez, D G, additional, Hitsman, B, additional, Hu, J J, additional, Hunt, S C, additional, Ingles, S A, additional, John, E M, additional, Kittles, R, additional, Kolb, S, additional, Kolonel, L N, additional, Le Marchand, L, additional, Liu, Y, additional, Lohman, K K, additional, McKnight, B, additional, Millikan, R C, additional, Murphy, A, additional, Neslund-Dudas, C, additional, Nyante, S, additional, Press, M, additional, Psaty, B M, additional, Rao, D C, additional, Redline, S, additional, Rodriguez-Gil, J L, additional, Rybicki, B A, additional, Signorello, L B, additional, Singleton, A B, additional, Smoller, J, additional, Snively, B, additional, Spring, B, additional, Stanford, J L, additional, Strom, S S, additional, Swan, G E, additional, Taylor, K D, additional, Thun, M J, additional, Wilson, A F, additional, Witte, J S, additional, Yamamura, Y, additional, Yanek, L R, additional, Yu, K, additional, Zheng, W, additional, Ziegler, R G, additional, Zonderman, A B, additional, Jorgenson, E, additional, Haiman, C A, additional, and Furberg, H, additional

Published
2012
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31. Branched oligomerization of cell-permeable peptides markedly enhances the transduction efficiency of adenovirus into mesenchymal stem cells

Author

Park, S-H, primary, Doh, J, additional, Park, S I, additional, Lim, J Y, additional, Kim, S M, additional, Youn, J-I, additional, Jin, H-T, additional, Seo, S-H, additional, Song, M-Y, additional, Sung, S Y, additional, Kim, M, additional, Hwang, S J, additional, Choi, J-M, additional, Lee, S-K, additional, Lee, H Y, additional, Lim, C L, additional, Chung, Y J, additional, Yang, D, additional, Kim, H-N, additional, Lee, Z H, additional, Choi, K Y, additional, Jeun, S-S, additional, and Sung, Y C, additional

Published
2010
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46. Evidence for genetic linkage of autism to chromosomes 7 and 4

Author

Schellenberg, G D, primary, Dawson, G, additional, Sung, Y J, additional, Estes, A, additional, Munson, J, additional, Rosenthal, E, additional, Rothstein, J, additional, Flodman, P, additional, Smith, M, additional, Coon, H, additional, Leong, L, additional, Yu, C-E, additional, Stodgell, C, additional, Rodier, P M, additional, Spence, M A, additional, Minshew, N, additional, McMahon, W M, additional, and Wijsman, E M, additional

Published
2006
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48. Evidence for multiple loci from a genome scan of autism kindreds

Author

Schellenberg, G D, primary, Dawson, G, additional, Sung, Y J, additional, Estes, A, additional, Munson, J, additional, Rosenthal, E, additional, Rothstein, J, additional, Flodman, P, additional, Smith, M, additional, Coon, H, additional, Leong, L, additional, Yu, C-E, additional, Stodgell, C, additional, Rodier, P M, additional, Spence, M A, additional, Minshew, N, additional, McMahon, W M, additional, and Wijsman, E M, additional

Published
2006
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