75,892 research outputs found
PROFILE POSITION CONTROL OF COMPLEX DISTILLATION CONFIGURATIONS
No full textThe dynamics and control of two complex column configurations (sidestream column with stripper and prefractionater/sidestream column configuration) which are multivariable, interacting and nonlinear, have been studied, A new control scheme developed by Han and Park(4)) to deal with the nonlinear and multivariable nature of distillation processes has been applied to these complex distillation configurations. The control scheme incorporates a nonlinear wave model into a generic model control framework, An observer based on the nonlinear wave model is used to determine the profile positions of distillation column sections. The control scheme enables tight control of the profile position of each column section that leads to fast stabilization of product compositions
Multivariable control of double-effect distillation configurations
No full textHeat-integrated double effect distillation column design is promising from the viewpoint of energy conservation. However, the control of the system is very difficult in the sense that the system is nonlinear, multivariable and interacting. A new model-based control scheme developed by Han and Park (AIChE J. 1993, 39 (5), 787) to deal with these difficulties has been applied to these heat-integrated distillation configurations (feed-split configuration, heavy-split configuration). Our simulation results indicate that the control scheme is able to overcome the severity of interactions and shows good control performance for a heat integrated double-effect distillation column with high purity specification
Zorochros (Zorochros) coreanus Han and Park, sp. nov.
No full textZorochros (Zorochros) coreanus Han and Park sp. nov. (Fig. 1 A; 2 A, E; 3 A, E; 4 A, B) Zorochros truncates Han 2000: Cate 2007: 194, nom. emendation. Type materials. Holotype male, River-sides of Hantan, Jeongok-myeon, Yeoncheon-gun, GG, Korea, 22.VI. 1998, leg. Taeman Han and Taehwa Kang. Paratypes: 4 males, 2 females, ditto; 1 male, Dodam-ri, Danyang-gun, CB, Korea, 18.VIII. 1984, leg. K. S. Jang; 2 males, 2 females, Musimcheon, Chungju-si, CB, Korea, 11.VI. 1998, leg. H. S. Lee. The type series are stored at NAAS. Description. Body 2.5 mm long and 1.4 mm wide, elliptic. Color black to black-brown, opaque, but basal three antennomeres and legs dusky red-brown; other antennomeres and femur dark brown (Fig. 1 A). Punctures dense, fine. Vestiture whitish yellow, distinctly erect or recumbent. Head flat between eyes; frontal carina complete, rounded, bifurcate at base; frontal groove narrowed mesally. Mandibles bidentate. Labrum semicircular, 2.1 times as wide as long. Maxillary palpi hatchet shaped; fourth segment subquadrate, 1.6 times as long as wide. Antennae slender: 11 th antennomere narrowly elliptic, reaching base of pronotal hind angle; first antennomere large, swelling; second cylindrical, 2.0 times as long as wide, 1.2 times longer than third; third cylindrical; fourth to tenth triangular, feebly serrate, 1.6 times longer than third (Fig. 2 A). Pronotum convex, 1.3 times as wide as long, broadest at middle; anterior margin slightly prolonged forwards at midline; lateral margins strongly arched at middle, narrowed towards head, weakly sinuate at base of hind angles (Fig. 3 A); disc with large granules forming triangular area on anterior longitudinal part (Fig. 3 E). Prosternum with anterior margin truncated; posterior process bent inwardly in lateral view, Scutellum flat, as long as wide (Fig. 2 E). Metacoxal plate flat, distinctly expanded in middle of posterior margin. Elytra elongate, disc flat, parallel sided in basal two thirds; humeral mucro indistinct. Abdomen with seventh sternite semicircular, 2.5 times wider than long. Aedeagus cylindrical. Median lobe wedge shaped, with ridged median carina, 1.33 times longer than telomeres. Parameres with 3 major setae on anterior lateral margin; basimeres feebly arcuate (Fig. 4 A, B). Female similar to male, but antennae only reaching before the base of pronotal hind angles. Distribution. Korea. Etymology. The species was named Z. coreanus by the type locality. Notes. The new species is very similar to Z. mesasiaticus Dolin 1995 from Uzbekistan and Kazakhstan in Central Asia (Fig. 1 B; 2 B, F; 3 B, F; 4 C), but distinguishable by the following characteristics: second antennomere longer (Fig. 2 A; Table 1), scutellum flat in dorsal and pronotal surface with narrower triangular area having large granules (Fig. 3 A, E). Regarding male genitalia, the apex of the median lobe beyond the parameres is concave, and more pointed; the parameres are rather stout with three thin setae (Fig. 4 A, B). Z. mesasiaticus possesses relatively large and strong male genitalia, in which the apex of the median lobe is not concave inwardly and more blunt; the parameres are more sharply pointed at apex with three thinker setae, of which second is longest (Fig. 4 C). This new species was collected in sand and gravel beside large and small streams. Species Z. (Z.) coreanus sp. nov. Z. (Z.) mesasiaticus Dolin Z. (Z.) mansusanensis Z. (Z.) gurjevae Dolin Ratios (n= 5) (n= 3) sp. nov. (n= 2) (n= 2)Published as part of Han, Taeman, Park, In Gyun & Park, Haechul, 2015, Two new species of the genus Zorochros (Coleoptera: Elateridae: Negastriinae) from Korea, pp. 261-269 in Zootaxa 3904 (2) on pages 263-264, DOI: 10.11646/zootaxa.3904.2.5, http://zenodo.org/record/23522
Zorochros mansusanensis Han and Park, sp. nov.
No full text<i>Zorochros mansusanensis</i> Han and Park sp. nov. <p>(Fig. 1 C; 2C, G; 3C, G; 4D, E)</p> <p> <i>Zorochros mansusanensis</i> Han 2000: Cate 2007: 193, nom. emendation.</p> <p> <b>Type materials</b>. Holotype male, Mt. Mansusan, Buyeo-gun, CN, 12.VI.1999, leg. Taeman Han. Paratypes: 2 males, ditto. The type specimens are preserved at NAAS.</p> <p> <b>Description</b>. Body 2.5 mm long and 1.0 mm wide, elliptic, more or less elongate, convex. Color black, opaque, but second antennomere, apex of mandible and legs red-brown; femur dark brown. Punctures fine, dense.Vestiture short, dense, recumbent, whitish yellow (Fig. 1 C). Head flat between eyes; surface rugose; frontal carina complete, rounded, bifurcated at base. Mandibles bidentate. Labrum semicircular, 1.8 times as wide as long. Maxillary palpi hatchet shaped; fourth segment subtriangular, 1.8 times as long as wide. Antennae slender, 11th antennomere not attaining the apex of pronotal hind angle; first antennomere large, swelling; second cylindrical, 1.25 times as long as third (Fig. 2 C); third cylindrical; fourth to tenth feebly serrate, 1.6 times as long as third. Pronotum convex, 1.2 times as wide as long, broadest at middle; anterior margin slightly prolonged forwards at middle; lateral margins arched suddenly narrowed towards head, not sinuate at base of hind angles (Fig. 3 C); disc punctuated densely and minutely, large granules forming triangular area on anteromedian longitudinal part (Fig. 3 G); hind angle short, stout at base, sharped at apex, with dorsal carina extending to basal one third along lateral margin (Fig. 3 C). Prosternum broadest at middle, with distinct granules on anteromedian part; posterior process bent inwardly in lateral view. Scutellum subequal in length and width, anterior margin smooth (Fig. 2 G). Metacoxal plate flat, distinctly expanded at middle of posterior margin. Elytra elongate, disc flat, parallel-sided in basal two third; humeral mucro indistinct; striae distinguished, but fifth one weakly depressed at base, sixth obsoleted. Abdomen with seventh sternite semicircular, 2.5 times as wide as long. Aedeagus fusiform. Median lobe wedge shaped, 1.3 times longer than telomeres. Paramere slightly attenuate towards apex; telomere stubby at apex, with rather weak three major setae located anteriorly; basimere feebly arcuate, broadest in basal one-third (Fig. 4 D, E).</p> <p> <b>Female</b>.unknown.</p> <p> <b>Distribution</b>. Korea.</p> <p> <b>Etymology</b>. The specific name, <i>Z. mansusanensis,</i> was derived from its type locality, Mt. Mansusan, in Korea.</p> <p> <b>Notes</b>. This new species closely resembles <i>Z. gurjevae</i> Dolin 1995 from Kazakhstan and Mongolia (Fig. 1 D; 2D, H; 3D, H; 4G), but is distinguishable by the relatively longer second antennomere, at least 1.2 times as long as third (0.97–1.0 times as long as third in <i>Z. gurjevae</i>), and the relatively shorter pronotum (Table 1). The prosternum of the novel species has larger granules on anteromedian region (Fig. 3 D, H), the median lobe of the male genitalia is 1.3 times as long as the telomere, and the apex of the median lobe is distinctly steeple-shaped at the apex. In <i>Z. gurjevae,</i> the median lobe is 1.5 times longer than the telomere and the telomeres are stouter (Fig. 4 F). This new species was found in gravel.</p>Published as part of <i>Han, Taeman, Park, In Gyun & Park, Haechul, 2015, Two new species of the genus Zorochros (Coleoptera: Elateridae: Negastriinae) from Korea, pp. 261-269 in Zootaxa 3904 (2)</i> on pages 265-267, DOI: 10.11646/zootaxa.3904.2.5, <a href="http://zenodo.org/record/235224">http://zenodo.org/record/235224</a>
Object-oriented graphical modeling of FMSs
No full textPresented in the article is a method for constructing a graphical model of an FMS by using a new modeling tool called JR-net (Job Resource relation-net). JR-net is an object-oriented graphical tool for modeling automated manufacturing systems (AMSs), such as FMSs, FASs, and AS/RSs. As with the object-oriented modeling paradigm of Rumbaugh et al. (1991), the JR-net modeling framework supports the three stages of models: static layout model (object model); job flow model (functional model); and supervisory control model (dynamic model). In this article, the existing JR-net structure (Park 1992, Han et al., 1995) is extended further to make it a graphical tool for FMS modeling. Using the extended JR-net, a step-by-step procedure for constructing a graphical model of FMSs is presented. Also addressed are issues of classifying FMSs in terms of their generic functions and of utilizing the JR-net model of FMSs
A nonlinear profile observer using tray temperatures for high-purity binary distillation column control
No full textA new, concise nonlinear profile position observer using tray temperatures instead of tray compositions is proposed. Composition measurement has been one of the major difficulties associated with the composition control of distillation columns because the on-line analyzers still suffer from large measurement delays. high investment/maintenance costs and low reliability. One of common alternatives to the analyzers is to use the secondary measurement such as tray temperatures which is able to infer the tray compositions. The performance of the nonlinear control scheme which consists of this nonlinear profile observer and the model-based controller for profile position control of high-purity distillation column proposed by Han and Park (1993, A.I.Ch.E. Journal, 39(5), 787-796) has been tested and compared with that of Han (1993, Control of high-purity distillation columns using a nonlinear wave theory, Ph.D. thesis, KAIST) in simulation of high-purity distillation column. The results of this new control scheme is very similar to Han and Park (1993). The control scheme is insensitive to the noise of the temperature measurements and so simple that it can be directly applied to the real high-purity distillation columns. (C) 1999 Elsevier Science Ltd. All rights reserved
hyemin-han/BayesFactorFMRI: BayesFactorFMRI V1.0.0
No full textBayesFactorFMRI is a tool developed with R and Python to allow neuroimaging researchers to conduct Bayesian second-level analysis of fMRI data and Bayesian meta-analysis of fMRI images with multiprocessing. This tool was developed to expedite computationally intensive Bayesian fMRI analysis through multiprocessing. Its GUI allows researchers who are not experts in computer programming to feasibly perform Bayesian fMRI analysis. BayesFactorFMRI is available via or GitHub for download. It would be widely reused by neuroimaging researchers who intend to analyse their fMRI data with Bayesian analysis with better sensitivity compared with classical analysis while saving time by distributing analysis tasks into multiple processes.
Please refer to and cite these articles when you use BayesFactorFMRI:
Journal of Open Research Software paper. Bayesian multiple comparison correction: Han, H. (in press). Implementation of Bayesian multiple comparison correction in the second-level analysis of fMRI data: With pilot analyses of simulation and real fMRI datasets based on voxelwise inference. Cognitive Neuroscience, 11(3), 157-169. http://bit.ly/2S6Uka2 Bayesian meta-analysis: Han, H., & Park, J. (2019). Bayesian meta-analysis of fMRI image data. Cognitive Neuroscience, 10(2), 66-76. http://bit.ly/2RCbxZ
hyemin-han/BayesFMRI: The first release of BayesFMRI
No full textBayesFMRI is a tool developed with R and Python to allow neuroimaging researchers to conduct Bayesian second-level analysis of fMRI data and Bayesian meta-analysis of fMRI images with multiprocessing. This tool was developed to expedite computationally intensive Bayesian fMRI analysis through multiprocessing. Its GUI allows researchers who are not experts in computer programming to feasibly perform Bayesian fMRI analysis. BayesFMRI is available via or GitHub for download. It would be widely reused by neuroimaging researchers who intend to analyse their fMRI data with Bayesian analysis with better sensitivity compared with classical analysis while saving time by distributing analysis tasks into multiple processes.
Please refer to and cite these articles when you use BayesFMRI:
Bayesian multiple comparison correction: Han, H. (in press). Implementation of Bayesian multiple comparison correction in the second-level analysis of fMRI data: With pilot analyses of simulation and real fMRI datasets based on voxelwise inference. Cognitive Neuroscience. http://bit.ly/2S6Uka2
Bayesian meta-analysis: Han, H., & Park, J. (2019). Bayesian meta-analysis of fMRI image data. Cognitive Neuroscience, 10(2), 66-76. http://bit.ly/2RCbxZY
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sj-pdf-1-han-10.1177_15589447211049517 – Supplemental material for Trends in the Management of Pediatric Trigger Thumb in the United States
No full textSupplemental material, sj-pdf-1-han-10.1177_15589447211049517 for Trends in the Management of Pediatric Trigger Thumb in the United States by Keon Min Park, Igor Immerman and Paymon Rahgozar in HAND</p
Lysophosphatidylcholine as an effector of fatty acid-induced insulin resistance
No full textThe mechanism of FFA-induced insulin resistance is not fully understood. We have searched for effector molecules(s) in FFA-induced insulin resistance. Palmitic acid (PA) but not oleic acid (OA) induced insulin resistance in L6 myotubes through C-Jun N-terminal kinase (JNK) and insulin receptor substrate 1 (IRS-1) Ser307 phosphorylation. Inhibitors of ceramide synthesis did not block insulin resistance by PA. However, inhibition of the conversion of PA to lysophosphatidylcholine (LPC) by calcium-independent phospholipase A(2) (iPLA(2)) inhibitors, such as bromoenol lactone (BEL) or palmitoyl trifluoromethyl ketone (PACOCF(3)), prevented insulin resistance by PA. iPLA(2) inhibitors or iPLA(2) small interfering RNA (siRNA) attenuated JNK or IRS-1 Ser307 phosphorylation by PA. PA treatment increased LPC content, which was reversed by iPLA(2) inhibitors or iPLA(2) siRNA. The intracellular DAG level was increased by iPLA(2) inhibitors, despite ameliorated insulin resistance. Pertussis toxin (PTX), which inhibits LPC action through the G-protein coupled receptor (GPCR)/G alpha(i), reversed insulin resistance by PA. BEL administration ameliorated insulin resistance and diabetes in db/db mice. JNK and IRS-1Ser307 phosphorylation in the liver and muscle of db/db mice was attenuated by BEL. LPC content was increased in the liver and muscle of db/db mice, which was suppressed by BEL. These findings implicate LPC as an important lipid intermediate that links saturated fatty acids to insulin resistance.-Han, M. S., Y-M. Lim, W. Quan, J. R. Kim, K. W. Chung, M. Kang, S. Kim, S. Y. Park, J-S. Han, S-Y. Park, H. G. Cheon, S. D. Rhee, T-S. Park, and M-S. Lee. Lysophosphatidylcholine as an effector of fatty acid-induced insulin resistance. J. Lipid Res. 2011. 52: 1234-1246
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