Search results for: Jong-Hwan Kim

Items from 1 to 20 out of 267 results

article

Evaluation of nail surface topography using a three‐dimensional in vivo optical skin imaging system

Hye Sung Han, Jong Hwan Kim, Tae‐Rin Kwon, Sung Eun Lee, more

Skin Research and Technology > 27 > 6 > 1035 - 1042

Background The analysis of nail surface topography is a subject of ever‐increasing interest in dermatology, especially in cosmetic studies. However, there is no accurate and scientifically sound instrumental method that can identify and provide quantitative data on nail surface topography. Materials and Methods The right index fingers of 78 healthy individuals were examined. The severity of nail...

article

In vivo evaluation of novel particle‐free polycaprolactone fillers for safety, degradation, and neocollagenesis in a rat model

Ji Yeon Hong, Jong Hwan Kim, Tae‐Rin Kwon, Jun Ki Hong, more

Dermatologic Therapy > 34 > 2 > n/a - n/a

Dermal fillers have become popular due to the increased demand for skin rejuvenation products. Polycaprolactone (PCL), a newly developed bioresorbable medical polymer, has emerged as a durable and safe dermal filler. However, available PCL fillers cause irritation; carrier gels can coagulate PCL particles, block the injection needle, and cause nonhomogeneity of particle suspensions that could be responsible...

article

Preclinical evaluation for removal of bulging lower eyelid fat using ultrasound‐assisted lipolysis on a Yorkshire pig

Kwang Ho Yoo, Tae Rin Kwon, Jong Hwan Kim, Beom Joon Kim

Skin Research and Technology > 27 > 1 > 93 - 100

Purpose The purpose of this study is to evaluate the efficacy and safety of treating lower eyelid fat bulging with ultrasound‐assisted lipolysis (UAL) by performing a preclinical evaluation of the procedure on a Yorkshire pig. Methods Two white Yorkshire pigs had lower eyelid fat bulging treated with UAL using a probe with a diameter of 1.0 mm or less. Fourteen days after treatment, we evaluated...

article

Comparison of different energy response for lipolysis using a 1,060‐nm laser: An animal study of three pigs

Tae‐Rin Kwon, Jong Hwan Kim, You Na Jang, Sung‐Eun Lee, more

Skin Research and Technology > 27 > 1 > 5 - 14

Background Non‐invasive body‐sculpting procedures are becoming increasingly popular. The application of 1,060 nm of laser energy transcutaneously to hyperthermically induce the disruption of fat cells in the abdomen is a type of non‐invasive procedure. Aims The purpose of this study was to compare the treatment results from two parameters of the same system, each with different energy output levels,...

article

ONECUT2 upregulation is associated with CpG hypomethylation at promoter‐proximal DNA in gastric cancer and triggers ACSL5

Eun‐Hye Seo, Hee‐Jin Kim, Jong‐Hwan Kim, Byungho Lim, more

International Journal of Cancer > 146 > 12 > 3354 - 3368

Many studies have focused on global hypomethylation or hypermethylation of tumor suppressor genes, but less is known about the impact of promoter hypomethylation of oncogenes. We previously showed that promoter methylation may gradually increase or decrease during the transition from gastric mucosa (GM) to intestinal metaplasia (IM) to gastric cancer (GC). In our study, we focused on regional CpG...

article

Prospective, preclinical comparison of the performance between radiofrequency microneedling and microneedling alone in reversing photoaged skin

Ji Yeon Hong, Tae‐Rin Kwon, Jong Hwan Kim, Byung Chul Lee, more

Journal of Cosmetic Dermatology > 19 > 5 > 1105 - 1109

Background There is a tremendous demand for dermal rejuvenation with minimal invasiveness and patient downtime. Aims In this study, we evaluated the performance of nonfractional monopolar radiofrequency for the improvement of photoaged skin texture and wrinkles. Methods In total, 32 6‐week‐old female hairless mice were randomized into four groups of eight mice each: (a) healthy control, (b) UVB‐exposed,...

article

Boehmite enhances hair follicle growth via stimulation of dermal papilla cells by upregulating β‐catenin signalling

Dong‐Ho Bak, Esther Lee, Byung‐chul Lee, Mi Ji Choi, more

Experimental Dermatology > 29 > 3 > 341 - 348

Hair growth, a complex process, has long been the subject of intense research. Recent developments in material technology have revealed boehmite as a new therapeutic modality for use in wound healing and scar reduction, indicating its beneficial effects. Nonetheless, the biological bases of the beneficial effects of boehmite remain unknown. We investigated the hair growth properties of boehmite in...

article

Gas chromatography–triple quadrupole mass spectrometry analysis of dioxins in soil

Young Sang Kwon, Sung-Gil Choi, Seung-Min Lee, Jong-Hwan Kim, more

Acta Chromatographica > 2019 > Vol. 31, no. 3 > 235--240

The applicability of gas chromatography–triple quadrupole mass spectrometry (GC–MS/MS) for determination of dioxins in soil was investigated. The analytical method was validated based on US Environmental Protection Agency (EPA) Method 1613 and European Union (EU) Regulation No. 709/2014 for selectivity, linearity of sensitivity, and instrumental limits of quantification (iLOQs). Method development...

article

Biostimulatory effects of polydioxanone, poly‐d, l lactic acid, and polycaprolactone fillers in mouse model

Tae‐Rin Kwon, Sung Won Han, In Kwon Yeo, Jong Hwan Kim, more

Journal of Cosmetic Dermatology > 18 > 4 > 1002 - 1008

Background Numerous fillers are increasingly used for augmentation of volume loss and relaxation of facial wrinkles. Collagen stimulators are the latest next‐generation dermal fillers that can induce neocollagenesis. To investigate biophysical characteristics, safety, and efficacy of newly developed polydioxanone (PDO) filler in comparison with poly‐l lactic acid (PLLA) and polycaprolactone (PCL)...

article

ART neural network-based integration of episodic memory and semantic memory for task planning for robots

Jauwairia Nasir, Deok-Hwa Kim, Jong-Hwan Kim

Autonomous Robots > 2019 > 43 > 8 > 2163-2182

Automated task planning for robots faces great challenges in that the sequences of events needed for a particular task are mostly required to be hard-coded. This can be a cumbersome process, especially, when the user wants a robot to learn a large number of similar tasks with different objects that are semantically related. We propose a novel approach of user preference-based integrated multi-memory...

article

Comparative Evaluation of the Biodegradability and Wrinkle Reduction Efficacy of Human-Derived Collagen Filler and Hyaluronic Acid Filler

Jong Hwan Kim, Tae-Rin Kwon, Sung Woo Hong, Joon Seok, more

Aesthetic Plastic Surgery > 2019 > 43 > 4 > 1095-1101

Background The development of fillers for wrinkle prevention is growing to meet rising demands to reduce the aging of skin. Objective In this experiment, we confirmed the effects of human collagen and hyaluronic acid filler biodegradation for wrinkle reduction using a photo-aging mouse model. Materials and Methods A total of 10 hairless mice (SKH1-Hrhr) were randomly divided into two groups and...

article

A comparison study of prabotulinumtoxinA vs onabotulinumtoxinA in myostatin‐deficient mice with muscle hypertrophy

Dong‐ho Bak, Mi Ji Choi, Esther Lee, Tae‐Rin Kwon, more

Basic & Clinical Pharmacology & Toxicology > 124 > 4 > 491 - 499

Botulinum toxin A (BoNT‐A) is used clinically for various muscle disorders and acts by preventing the release of the neurotransmitter acetylcholine into the synapse space. Here, we compared the efficacy of prabotulinumtoxinA (PRA) and onabotulinumtoxinA (ONA) for the reduction in hypertrophy in myostatin‐deficient (Mstn^−/−) mice. Two different BoNT‐A products (2.5, 10 and 25 U/kg) were injected to...

article

Effects on skin of Stichopus japonicus viscera extracts detected with saponin including Holothurin A: Down-regulation of melanin synthesis and up-regulation of neocollagenesis mediated by ERK signaling pathway

Tae-Rin Kwon, Chang Taek Oh, Dong-Ho Bak, Jong Hwan Kim, more

Journal of Ethnopharmacology > 2018 > 226 > C > 73-81

Stichopus japonicus (sea cucumber), edible traditional food in Asia, and its extracts are renowned for their wound healing, pain relieving, and cosmetic effects in traditional medicine. Holothurins, toxins isolated from sea cucumber, are thought to be active components for their beneficial effects. However, researchers have yet to outline specific mechanisms thereof.The present study was designed...

article

Fractional CO₂ laser treatment for vaginal laxity: A preclinical study

Tae‐Rin Kwon, Jong Hwan Kim, Joon Seok, Jae Min Kim, more

Lasers in Surgery and Medicine > 50 > 9 > 940 - 947

Background and Objective Various studies have investigated treatment for vaginal laxity with microablative fractional carbon dioxide CO₂ laser in humans; however, this treatment has not yet been studied in an animal model. Herein, we evaluate the therapeutic effects of fractional CO₂ laser for tissue remodeling of vaginal mucosa using a porcine model, with the aim of improving vaginal laxity. Study...

article

Ceramic plasma‐spray‐coated graphite crucible for injection casting of fast reactor fuel slugs

Ki‐Hwan Kim, Ki‐Won Hong, Jong‐Hwan Kim, Jeong‐Yong Park, more

International Journal of Applied Ceramic Technology > 15 > 4 > 991 - 998

Ceramic plasma‐spray coatings with single and multiple layers have been applied to melting crucible material substrates for the development of a reusable crucible for the fabrication of metal fuel slugs for a sodium‐cooled fast reactor (SFR). Various combinations of vacuum plasma‐spray (VPS) coated specimens have been applied to investigate the bonding effect on the crucible substrate and the interaction...

article

CHIP: Constraint Handling with Individual Penalty approach using a hybrid evolutionary algorithm

Rituparna Datta, Kalyanmoy Deb, Jong-Hwan Kim

Neural Computing and Applications > 2019 > 31 > 9 > 5255-5271

Constraint normalization ensures consistency in scaling for each constraint in an optimization problem. Most constraint handling studies only address the issue to deal with constraints and use problem information to scale the constraints. In this paper, we propose a hybrid evolutionary algorithm—Constraint Handling with Individual Penalty Approach (CHIP)—which scales all constraints adaptively without...

article

Ultrasonography-guided curettage of poly-DL-lactic acid filler granulomas

Joon Seok, Jae Min Kim, Tae Rin Kwon, Jong Hwan Kim, more

Journal of the American Academy of Dermatology > 2018 > 78 > 1 > e5-e6

article

Preparation of metallic fuel rodlets for irradiation testing in the HANARO research reactor

Jong-Hwan Kim, Jung Won Lee, Jeong-Yong Park

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 137-143

U–10 wt% Zr fuel rodlets, which will be irradiated in the HANARO research reactor in order to evaluate the irradiation performance of metallic fuel and validate the in-reactor behavior, were prepared through determined fabrication processes. Injection casting technology was applied to produce U–10Zr fuel slugs, and sodium melt and a bonding process were conducted to bond a fuel slug to the fuel cladding...

article

Development of cabbage reference material for multi-residue pesticide analysis

Jong-Hwan Kim, Sung-Gil Choi, Young Sang Kwon, Su-Myeong Hong, more

Applied Biological Chemistry > 2018 > 61 > 1 > 15-23

Cabbage reference material for pesticide multi-residue analysis was developed in accordance with the ISO Guide 35, ISO Guide 13528 and European Union Reference Laboratories-Proficiency Test standard protocols. Ten pesticides (acetamiprid, azoxystrobin, boscalid, buprofezin, carbendazim, difenoconazole, ethofenprox, imidacloprid, pyraclostrobin and tebuconazole) detected at relatively high levels in...

article

Hierarchical emotional episodic memory for social human robot collaboration

Won-Hyong Lee, Jong-Hwan Kim

Autonomous Robots > 2018 > 42 > 5 > 1087-1102

For social human robot collaboration, robots need to effectively remember human experiences and manage emotional experiences as well as repetitive experiences. To implement these functions, the hierarchical emotional episodic memory, using deep adaptive resonance theory network, is proposed in this paper. The proposed memory not only learns emotional experiences, but also has the ability to anticipate...

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INFONA - science communication portal

Search results for: Jong-Hwan Kim

Evaluation of nail surface topography using a three‐dimensional in vivo optical skin imaging system

In vivo evaluation of novel particle‐free polycaprolactone fillers for safety, degradation, and neocollagenesis in a rat model

Preclinical evaluation for removal of bulging lower eyelid fat using ultrasound‐assisted lipolysis on a Yorkshire pig

Comparison of different energy response for lipolysis using a 1,060‐nm laser: An animal study of three pigs

ONECUT2 upregulation is associated with CpG hypomethylation at promoter‐proximal DNA in gastric cancer and triggers ACSL5

Prospective, preclinical comparison of the performance between radiofrequency microneedling and microneedling alone in reversing photoaged skin

Boehmite enhances hair follicle growth via stimulation of dermal papilla cells by upregulating β‐catenin signalling

Gas chromatography–triple quadrupole mass spectrometry analysis of dioxins in soil

Biostimulatory effects of polydioxanone, poly‐d, l lactic acid, and polycaprolactone fillers in mouse model

ART neural network-based integration of episodic memory and semantic memory for task planning for robots

Comparative Evaluation of the Biodegradability and Wrinkle Reduction Efficacy of Human-Derived Collagen Filler and Hyaluronic Acid Filler

A comparison study of prabotulinumtoxinA vs onabotulinumtoxinA in myostatin‐deficient mice with muscle hypertrophy

Effects on skin of Stichopus japonicus viscera extracts detected with saponin including Holothurin A: Down-regulation of melanin synthesis and up-regulation of neocollagenesis mediated by ERK signaling pathway

Fractional CO₂ laser treatment for vaginal laxity: A preclinical study

Ceramic plasma‐spray‐coated graphite crucible for injection casting of fast reactor fuel slugs

CHIP: Constraint Handling with Individual Penalty approach using a hybrid evolutionary algorithm

Ultrasonography-guided curettage of poly-DL-lactic acid filler granulomas

Preparation of metallic fuel rodlets for irradiation testing in the HANARO research reactor

Development of cabbage reference material for multi-residue pesticide analysis

Hierarchical emotional episodic memory for social human robot collaboration

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