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Search Results: 1 - 10 of 20927 matches for " Hyung Kil Kim "
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Histopathology and TB-PCR kit analysis in differentiating the diagnosis of intestinal tuberculosis and Crohn’s disease
Xian Ji Jin, Joon Mee Kim, Hyung Kil Kim, Lucia Kim, Suk Jin Choi, In Suh Park, Jee Young Han, Young Chae Chu, Ju Young Song, Kye Sook Kwon, Eun Joo Kim
World Journal of Gastroenterology , 2010,
Abstract: AIM: To compare the histopathologic features of intestinal tuberculosis (ITB) and Crohn’s disease (CD) and to identify whether polymerase chain reaction for Mycobacterium tuberculosis (TB-PCR) would be helpful for differential diagnosis between ITB and CD.METHODS: We selected 97 patients with established diagnoses (55 cases of ITB and 42 cases of CD) who underwent colonoscopic biopsies. Microscopic features of ITB and CD were reviewed, and eight pathologic parameters were evaluated. Nine cases of acid fast bacilli culture-positive specimens and 10 normal colonic tissue specimens were evaluated as the positive and negative control of the TB-PCR test, respectively. PCR assays were done using two commercial kits: kit detected IS6110 and MPB64, and kit detected IS6110 only; a manual in-house PCR method was also performed on formalin-fixed, paraffin-embedded colonoscopic biopsy specimens.RESULTS: Statistically significant differences were noted between ITB and CD with regard histopathologic criteria: size of granulomas (P = 0.000), giant cells (P = 0.015), caseation necrosis (P = 0.003), confluent granulomas (P = 0.001), discrete granulomas (P = 0.000), and granulomas with lymphoid cuffs (P = 0.037). However, 29 cases (52.7%) of ITB showed less than five kinds of pathologic parameters, resulting in confusion with CD. The sensitivities and specificities of the TB-PCR test by kit , kit , and the in-house PCR method were 88.9% and 100%, 88.9% and 100%, and 66.7% and 100% in positive and negative controls, respectively. The PCR test done on endoscopic biopsy specimens of ITB and CD were significantly different with kit (P = 0.000) and kit (P = 0.000). The sensitivities and specificities of TB-PCR were 45.5% and 88.1%, 36.4% and 100%, and 5.8% and 100%, for kit and kit and in-house PCR method on endoscopic biopsy specimens. Among the 29 cases of histopathologically confusing CD, 10 cases assayed using kit and 6 cases assayed using kit were TB-PCR positive. A combination of histologic findings and TB-PCR testing led to an increase of diagnostic sensitivity and the increase (from 47.3% to 58.2) was statistically significant with kit (P = 0.000).CONCLUSION: The TB-PCR test combined with histopathologic factors appears to be a helpful technique in formulating the differential diagnosis of ITB and CD in endoscopic biopsy samples.
Comparison of Brood Productions in the Cold-Treated Pairing vs. Not Cold-Treated Pairing in a Stenochronous Spider
Kil Won Kim
Journal of Ecology and Field Biology , 2009,
Abstract: To understand whether experience of cold season in reproductive behaviors in the adults ofAmaurobius ferox, the paired adults of a female and a male were exposed under ‘cold-treated environment’ and‘not cold-treated environment’, respectively. I investigated effects of the cold treatment on the brood productionof A. ferox. In not cold treatment in which male-female pairs were formed in October at a temperature of 20℃(± 2℃) and continuously kept under not cold-treated environment, only 3 of 50 pairs successfully reproduced(reproduction was defined as the emergence of spiderlings). In cold treatment where individuals were kept incold conditions for 3 months prior to pair formation, 57 out of 60 couples succeeded in reproducing. Femaleswhich did not experience the low temperature displayed strong aggressiveness toward males. This behavioralinhibition might the primary barrier to copulation of A. ferox that decrease following a period of low temperature.The reproductive inhibition might help the females to allocate the maximum amount of energy in a givenenvironment to reaching the adult stage and to delay reproduction in unfavorable wintering conditions.
Maternal Body-mass Transfer to Offspring in the Matriphagous Spider, Amaurobius ferox (Amaurobiidae)
Kil Won Kim
Journal of Ecology and Field Biology , 2009,
Abstract: The optimal strategy for semelparous females may involve adjustments in the relative investmentin two fitness components, the number of offspring and the post-hatching investment per capita. To determinethe pattern of maternal resource allocation to offspring in the matriphagous spider, Amaurobius ferox (Amaurobiidae),I investigated the relationship between maternal body-mass and the number of offspring, and quantifiedthe transfer of maternal body-mass to the offspring via different forms of maternal provisioning (trophic egg-layingand matriphagy). There was a positive relationship between female body-mass and the number of offspring.However, Amaurobius mothers did not produce more trophic eggs when they had larger broods. Rather, spiderlingsin larger A. ferox broods consumed larger quantities of maternal body-mass via matriphagy. Mothers transferred28.8 ± 6.5% of their body-mass to the spiderlings via trophic egg-laying, and an estimated 39.0 ± 12.5%of their body-mass was transferred to the spiderlings via matriphagy.
Maternal Influence on Spiderlings' Emergence from the Cocoon: Observations in a Subsocial Spider
Kim, Kil Won
Journal of Ecology and Field Biology , 2009,
Abstract: Brood caring behavior was observed in Amaurobius ferox (Araneae, Amaurobiidae), a semelparoussubsocial spider, from cocoon construction until the emergence of spiderlings from the cocoon. Unlike mostspiders, which emerge from cocoon by their own means, A. ferox mothers intervene in the process of theemergence of their young. I manipulated broods by removing the mother prior to emergence to determine theeffects of maternal behavior on the emergence of spiderlings. My results showed that maternal interventionmaking the cocoon expansion and its exit, is not absolutely necessary for the emergence of A. ferox spiderlingsfrom the cocoon. Nine clutches out of ten were able to get out of the cocoon by their own means without theirmother's help. There was no difference between control groups ('with mother') and experimental groups ('withoutmother') in the number of spiderlings that emerged (96.9 ± 25.3 vs. 90.4 ± 14.2, respectfully) and in the time fromthe beginning to the end of emergence (36 ± 12 vs. 41 ± 17 hours). Time from eclosion until the emergence ofthe first individual in a clutch, however, was greater in the mother-absent group (3.5 days) than in the controlgroup (2.0 days). The construction of the cocoon by the mother required always occurred in the same area withinthe retreat, and took approximately 6 hours, and the mother guarded the eggs during the incubation period. Theemergence of the spiderlings followed a sigmoidal pattern. After emergence, the spiderlings formed a verycompact group on the cocoon, which may be important in securing maternal care. The absence of cribellum andcalamistrum, structures likely involved in their survival, observed in individuals of the first instar suggests thatin the first stage of life, the spiderlings are dependent on their mother.
Moreau-Yosida approximation and convergence of Hamiltonian systems on Wasserstein space
Hwa Kil Kim
Mathematics , 2012,
Abstract: In this paper, we study the stability property of Hamiltonian systems on the Wasserstein space. Let $H$ be a given Hamiltonian satisfying certain properties. We regularize $H$ using the Moreau-Yosida approximation and denote it by $H_\tau.$ We show that solutions of the Hamiltonian system for $H_\tau$ converge to a solution of the Hamiltonian system for $H$ as $\tau$ converges to zero. We provide sufficient conditions on $H$ to carry out this process.
Value functions in the Wasserstein spaces: finite time horizons
Ryan Hynd,Hwa Kil Kim
Mathematics , 2013,
Abstract: We study analogs of value functions arising in classical mechanics in the space of probability measures endowed with the Wasserstein metric $W_p$, for $1
Infinite horizon value functions in the Wasserstein spaces
Ryan Hynd,Hwa Kil Kim
Mathematics , 2013,
Abstract: We perform a systematic study of optimization problems in the Wasserstein spaces that are analogs of infinite horizon, deterministic control problems. We derive necessary conditions on action minimizing paths and present a sufficient condition for their existence. We also verify that the corresponding generalized value functions are a type of viscosity solution of a time independent, Hamilton-Jacobi equation in the space of probability measures. Finally, we prove a special case of a conjecture involving the subdifferential of generalized value functions and their relation to action minimizing paths.
Generating and Adding Flows on Locally Complete Metric Spaces
Hwa Kil Kim,Nader Masmoudi
Mathematics , 2012, DOI: 10.1007/s10884-012-9280-3
Abstract: As a generalization of a vector field on a manifold, the notion of an arc field on a locally complete metric space was introduced in \cite{BC}. In that paper, the authors proved an analogue of the Cauchy-Lipschitz Theorem i.e they showed the existence and uniqueness of solution curves for a time independent arc field. In this paper, we extend the result to the time dependent case, namely we show the existence and uniqueness of solution curves for a time dependent arc field. We also introduce the notion of the sum of two time dependent arc fields and show existence and uniqueness of solution curves for this sum.
Nonconvulsive Status Epilepticus in Hepatic Encephalopathy
Paul Jhun,Hyung Kim
Western Journal of Emergency Medicine : Integrating Emergency Care with Population Health , 2011,
Abstract: We discuss a case of a 64-year-old male with a history of liver failure presenting with altered mental status, initially diagnosed with hepatic encephalopathy but ultimately diagnosed with nonconvulsive status epilepticus (NCSE) by electroencephalogram (EEG). NCSE is a difficult diagnosis to make, given no clear consensus on diagnostic criteria. Especially in the intensive care unit setting of persistent altered mental status with no clear etiology, NCSE must be considered in the differential diagnosis, as the consequences of delayed diagnosis and treatment can be substantial. EEG can be useful in the evaluation of patients with hepatic encephalopathy who have persistently altered levels of consciousness despite optimal medical management. [West J Emerg Med. 2011;12(4):372–374.]
Study about How the Chinese Economic Status Affects to the Baltic Dry Index
Kim, hyung-geun
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n3p116
Abstract: China has become one of the world’s economic pillars, surely a G2 nation. Along with the enormously fast economic globalization and China’s fast growth, exchange consolidation between Korea and China is inevitable. Also, since Korea is a country with a high foreign trade rate, the Chinese variation is crucial. This research has analyzed the co-relationship between the BDI, ship’s space, and the Chinese economic trend, and the effect China has on the merchant marine market, using a hypothesis that says the Chinese economic fluctuation caused by national development is a major factor in the world bulk traffic fee fluctuation. The research has concluded that the Chinese economic fluctuation does affect the dry bulk traffic fee and the bottom constantly.
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