Chonbuk National University is a national research university founded in 1947, located in Jeonju, South Korea. As the flagship national university for the Jeollabuk-do province , Chonbuk National University has been ranked 501–550th in the world by QS Top Universities Ranking in 2010. Wikipedia.
Chonbuk National University | Date: 2016-08-26
A method for manufacturing metal oxide-grown carbon fibers including immersing carbon fibers in a solution for forming a metal oxide seed layer and electrodepositing a metal oxide seed on the surfaces of carbon fibers, or irradiating microwave thereto to form a metal oxide seed layer, and irradiating microwave to the metal oxide seed layer-formed carbon fibers to grow metal oxide. The method for manufacturing metal oxide-grown carbon fibers can reduce process time, and improve process energy efficiency and production efficiency. The method for manufacturing metal oxide-grown carbon fibers can offer metal oxide-grown carbon fibers with improved interfacial shear stress.
Chonbuk National University | Date: 2017-03-22
The present invention relates to a composition and health functional food for preventing and treating male infertility using a mixed herbal mixture. Through an in vitro sperm mobility promotion effect evaluation method experiment for investigating effects of an herbal extract of Morinda officinalis, cuscuta seed, and/or Allium cepa of the present invention on changes in sperm count and mobility in human semen, it was verified that the samples of the present invention increased sperm mobility. In addition, through an in vivo varicocele animal model evaluation method for investigating effects of the herbal extract on changes in sperm count and mobility in an in vino varicocele animal model, it was verified that the samples of the present invention increased the sperm count in the semen obtained from spermiducts of a sample-administered group among varicocele-induced groups. Therefore, the herbal extract of the present invention can be usefully used in a pharmaceutical composition, health functional food, and health supplement food for preventing and treating male infertility.
Chonbuk National University | Date: 2014-05-08
The present invention relates to a pharmaceutical composition containing a SIRT2 inhibitor and, more specifically, to: a pharmaceutical composition for preventing or treating renal inflammatory diseases, which are caused by sepsis, by controlling inflammation-inducing factors by sepsis through the regulation of SIRT2 gene expression so as to reduce renal inflammation, thereby preventing a kidney injury; and a pharmaceutical composition for preventing or treating cancer, having an effect of increasing anticancer efficacy while reducing nephrotoxicity, which is a side effect of cisplatin, when administered together with cisplatin.
Chonbuk National University | Date: 2015-04-08
A composition and health functional food for treating male infertility using a mixed herbal mixture. Through an in vitro sperm mobility promotion effect evaluation method experiment for investigating effects of an herbal extract of Morinda officinalis, Cuscuta seed, and/or Allium cepa of the present invention on changes in sperm count and mobility in human semen, it was verified that the composition increased sperm mobility. In addition, through an in vivo varicocele animal model evaluation method for investigating effects of the herbal extract on changes in sperm count and mobility in an in vivo varicocele animal model, it was verified that the composition samples of the present invention increased the sperm count in the semen obtained from spermiducts of a sample-administered group among varicocele-induced groups. Therefore, the herbal extract can be used in a pharmaceutical composition, health functional food, and health supplement food for treating male infertility.
Chonbuk National University | Date: 2015-07-06
An output power control method of a wind generator includes: when a disturbance occurs, increasing output power of the wind generator by adding the active power proportional to kinetic energy stored in the wind generator at the instant of a disturbance, wherein the increasing of output power calculates an increment of the output power by using a mechanical input curve and an electrical output curve at a corresponding wind speed of the wind generator, and the increment of the output power is determined as a constant which makes the mechanical input curve of the wind generator and the electrical output curve intersect at least at one point according to each input wind speed, and when an intersection determined above is formed at a rotor speed lower than _(min), the increment of the output power is determined as a maximum constant value which makes the rotor speed reach a predetermined point.
Chonbuk National University | Date: 2015-07-09
Provided is a cancer cell growth inhibition and killing device using a blue light LED. The present invention comprises: a bed part which has a top plate on which the body is laid to stand by; a main body part provided with a treatment space, which has a predetermined size and on which the bed part is disposed, and having a chamber which is divided by the treatment space and a transparent plate formed of a light-transmitting material to thus form a treatment light generation space; and a treatment light generation unit which generates a treatment light having a wavelength band of a predetermined size when power is applied so that the treatment light can penetrate the subcutaneous tissue of the body and thereby stimulate and kill cancer cells moving along blood vessels, and which is provided in the chamber so as to irradiate the treatment space with the treatment light after the treatment light has penetrated though the transparent plate.
Anygen Inc., Samsung, Snu R&D Foundation and Chonbuk National University | Date: 2016-01-13
The present invention relates to a pharmaceutical composition for treating or preventing erectile dysfunction, containing LDD175 as an active ingredient. Furthermore, the present invention relates to a co-administration preparation for treating or preventing erectile dysfunction, containing LDD175 and a PDE5 inhibitor as active ingredients. The LDD175 of the present invention has an excellent corporal smooth muscle relaxation effect, and thus significantly improved erectile function. Since the LDD175 of the present invention acts on BK_(Ca )channels, and thus is expected to have little adverse cardiovascular effects. The LDD175 of the present invention exhibits an erectile dysfunction therapeutic ability equivalent to that of udenafil, which is a PDE5 inhibitor, and showed a synergistic corporal smooth muscle relaxation effect when being co-administered with udenafil.
Choi W.-Y.,Chonbuk National University
IEEE Transactions on Power Electronics | Year: 2013
This paper proposes a high-efficiency dc-dc converter with fast dynamic response for low-voltage photovoltaic (PV) sources. The voltage stress of power switches is reduced at low-voltage side. Zero-current turn-off of output diodes is achieved at high-voltage side. Power efficiency is improved by reducing switching power losses. A modified proportional and integral controller is also suggested to achieve fast output voltage control. The dynamic response of the proposed converter is improved. The performance of the proposed converter is verified based on an experimental prototype for a 200-W PV module. © 1986-2012 IEEE.
Kwon S.-D.,Chonbuk National University
Applied Physics Letters | Year: 2010
This paper proposes a T-shaped piezoelectric cantilever for generating electric power from fluid flow. The working principle of the device is based on aeroelastic flutter and utilizes a bimorph cantilever with T-shape which hastens occurrence of flutter at a low fluid speed. A prototype device (100×60×30 mm3) was tested in a wind tunnel. The device was found to provide power from a wind speed of 4 m/s and a continuous peak electrical power output of 4.0 mW. The simplicity of the present device consisting of only a bimorph cantilever is considered to be cost effective. © 2010 American Institute of Physics.
Park M.-S.,Chonbuk National University
Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association | Year: 2014
PURPOSE: The aim of this study was to assess complications related to arthroscopy for femoroacetabular impingement (FAI) and how these complications have changed as we have gained more experience with this procedure.METHODS: The authors reviewed 200 hips (197 patients). The average patient age was 44.64 years and the mean follow-up time was 28.2 months. All patients underwent hip arthroscopy in the supine position. Clinically, Modified Harris Hip Scores (MHHS) and patient satisfaction with outcome were used. We divided complications into 3 groups: Group 1 related to traction, group 2 related to surgical technique or implant failure, and group 3 related to outcomes.RESULTS: Clinically, the MHHS improved from 69.96 (±6.10) to 80.45 (±7.00), and patient satisfaction with the achieved outcome increased to 8.87 (±0.76). The overall complication rate was 15% (30 of 200 hips). Group 1 consisted of 4 patients with pudendal neuropraxia and 2 patients with ankle joint pain (P = .013). Group 2 consisted of 2 patients with lateral femoral cutaneous neuropraxia, 2 patients with iatrogenic labral perforations, one patient with a labral tear, and 4 patients with femoral head scuffs. There were 4 incidents of instrument breakage. Furthermore, 3 suture anchors failed, a second-degree burn occurred in one patient, and there was incomplete reshaping in 5 hips (P = .045). Group 3 included one patient with a snapping sound and heterotopic ossification. Second-look arthroscopy was performed for 5 hips. All the complications outlined in groups 1 and 2 are related to the learning curve and have statistical significance (P < .05).CONCLUSIONS: Complications relating to hip arthroscopy took different forms during the early learning period, but overall complication rates decreased along the learning curve. Surgical technique-related complications such as problems with suture anchors and the reshaping of cam impingements were also considered during the later stage.LEVEL OF EVIDENCE: Level IV, therapeutic case series. Copyright © 2014 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.