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Search Results: 1 - 10 of 5185 matches for " Junho1 "
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Preferred Feeding Sites and Prey of the Adult Gold-spotted Pond Frog, Rana plancyi chosenica
Eom, Junho1,Jung-Hyun Lee2,Nam-Yong Ra2,Daesik Park1*
Journal of Ecology and Field Biology , 2007,
Abstract: To determine the feeding sites preferred by adult gold-spotted pond frogs, Rana plancyi chosenica,and the foods that induce favorable growth of the frogs in the laboratory, we conducted two separate experimentsbetween 27 May and 12 July 2007 in a vivarium. In the first experiment, we counted the number of cricketseaten by four gold-spotted pond frogs in a 60 min period at four different feeding sites within the experimentalarenas: on the water surface, at the edge of a pond, and at two terrestrial sites. Adult gold-spotted pond frogsate more crickets on the water surface and at the edge of the pond than the terrestrial sites. In the secondexperiment, we measured the growth of SVL (snout-vent length) and body mass of adult gold-spotted pond frogsfed crickets, mealworms, maggots, or earthworms in individual experimental boxes over a one month period. TheSVL and body mass of the adult gold-spotted pond frogs fed crickets, mealworms, or maggots were greater thanthose of the frogs that were fed earthworms. These results indicate that providing crickets, mealworms, ormaggots on the water or at the edge of a pond should induce favorable growth of captive-reared adult goldspottedpond frogs.
Sum Formulas for Local Gromov-Witten Invariants of Spin Curves
Junho Lee
Mathematics , 2012,
Abstract: Holomorphic 2-forms on K\"{a}hler surfaces lead to "Local Gromov-Witten invariants" of spin curves. This paper shows how to derive sum formulas for such local GW invariants from the sum formula for GW invariants of certain ruled surfaces. These sum formulas also verify the Maulik-Pandharipande formulas that were recently proved by Kiem and Li.
Degree three spin Hurwitz numbers
Junho Lee
Mathematics , 2012,
Abstract: Recently, Gunningham \cite{G} calculated all spin Hurwitz numbers in terms of combinatorics of Sergeev algebra. In this paper, we use a spin curve degeneration to obtain a recursion formula for degree three spin Hurwitz numbers.
Local GW Invariants of Elliptic Multiple Fibers
Junho Lee
Mathematics , 2012,
Abstract: We use simple geometric arguments to calculate the dimension zero local Gromov-Witten invariants of elliptic multiple fibers. This completes the calculation of all dimension zero GW invariants of elliptic surfaces with $p_g>0$.
Counting Curves in Elliptic Surfaces by Symplectic Methods
Junho Lee
Mathematics , 2003,
Abstract: We explicitly compute family GW invariants of elliptic surfaces for primitive classes. That involves establishing a TRR formula and a symplectic sum formula for elliptic surfaces and then determining the GW invariants using an argument from \cite{ip3}. In particular, as in \cite{bl1}, these calculations also confirm the well-known Yau-Zaslow Conjecture \cite{yz} for primitive classes in $K3$ surfaces.
Family Gromov-Witten Invariants for Kahler Surfaces
Junho Lee
Mathematics , 2002,
Abstract: The usual Gromov-Witten invariants are zero for K\"{a}hler surfaces with $p_g\geq 1$. In this paper we use analytic methods to define Family Gromov-Witten Invariants for K\"{a}hler surfaces. We prove that these are well-defined invariants of the deformation class of the K\"{a}hler structure.
Holomorphic 2-forms and Vanishing Theorems for Gromov-Witten Invariants
Junho Lee
Mathematics , 2006,
Abstract: On a compact K\"{a}hler manifold $X$ with a holomorphic 2-form $\a$, there is an almost complex structure associated with $\a$. We show how this implies vanishing theorems for the Gromov-Witten invariants of $X$. This extends the approach, used in \cite{lp} for K\"{a}hler surfaces, to higher dimensions.
A note on the Gunningham's formula
Junho Lee
Mathematics , 2014,
Abstract: Gunningham [G] constructed an extended topological quantum field theory (TQFT) to obtain a closed formula for all spin Hurwitz numbers. In this note, we use the gluing theorem in [LP2] to reprove the Gunningham's formula. We also describe a TQFT formalism naturally induced from the gluing theorem.
Harmonic Suppression Characteristic of a CPW-FED Circular Slot Antenna Using Single Slot on a Ground Conductor
Junho Yeo;Dongho Kim
PIER Letters , 2009, DOI: 10.2528/PIERL09072108
Abstract: A CPW-fed circular slot antenna with a slot on a ground conductor is presented for harmonic suppression. The antenna has a multi-band rejection characteristic where the second and higher rejection bands are integer-multiple of the first band, and this is generated by inserting single slot on a ground conductor of the antenna. Good agreement between the simulated and measured results is reported and the integer-multiple notch bands can be adjustable by changing the length of the slot on the ground plane.
Pivoted Table Index for Querying Product-Property-Value Information
Hyunja Lee,Junho Shim
Journal of Software , 2010, DOI: 10.4304/jsw.5.2.160-167
Abstract: The query for triple information on product–attribute (property)–value is one of the most frequent queries in e-commerce. In storing the triple (product–attribute–value) information, a vertical schema is effective for avoiding sparse data and schema evolution, while a conventional horizontal schema often shows better query performance, since the properties are queried as groups clustered by each product. Therefore, we propose two storage schemas: a vertical schema as a primary table structure for the triple information in RDBMS and a pivoted table index created from the basic vertical table as an additional index structure for accelerating query processing. The pivoted table index is beneficial to improving the performance of the frequent pattern query on the group properties associated with each product class.
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