• The Journal of Korean Physical Therapy
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• v.23 no.5
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• pp.29-34
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• 2011

Purpose: The purpose of this study is to evaluate the short term effects of the traction and decompression device, which is a newly developed domestic medical device, on pain and functional activity in patients with chronic low back pain with or without radicular pain. Methods: Forty patients with chronic low back pain were included and allocated to decompression (n=20) and traction groups (n=20). They received decompression or traction therapy for 20 minutes a day, 3 days per week for two weeks. For evaluating pain and functional activity, a visual analogue scale (VAS) for low back pain and the Oswestry back pain disability index (ODI) were obtained on pre-treatment, and at 6, 12 and 15 days after treatment. Patients'satisfaction levels were measured 15 days after treatment. Results: VAS was significantly decreased at 12 days and 15 days post-treatment compared to pre-treatment in both groups (p<0.05). ODI was significantly decreased at 12 days and 15 days post-treatment compared to pre-treatment in the decompression group (p<0.05). However, there was no significant difference between the two groups in the VAS and ODI scales (p>0.05). Patients' satisfaction levels were significantly higher in the decompression group than in the traction group (p<0.05). Conclusion: These findings suggest that decompression therapy might be effective for increasing functional activity in patients with low back pain and could provide patients with higher satisfaction than traction therapy. This study provided validity data for the therapeutic effects of the decompression device in patients with low back pain and it will be useful for medical cost development and patient education of this device.

• Korean Journal of Oriental Medicine
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• v.13 no.2 s.20
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• pp.91-100
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• 2007

In this paper, We tried to analyze the patent trend on constitution diagnosis and treatment related technologies. For this, constitution diagnosis and treatment related technologies divided into 16 sub-technology by the advisory committee. And we analyzed patents applied in Korea, Japan, U.S.A., China, and Europe. The 16 sub-technology consist of pulse analyzer, skin diagnosis, tongue analyzer, face and body detector, face analyzer, voice analyzer, intelligence ontology, meridian diagnosis, infrared thermography, electric stimulation, laser, high and low frequency, physical, magnetic, and ultrasound therapy. As a result we found that patents of constitution diagnosis and treatment in Korea has been growing steadily in both quality and quantity since 1980s. The number of patent the pulse analyzer and low frequency therapy are larger than others. But applied relevant international patents, marketability of the patent and Cites per Patent (CPP) index are shown to be very low. In conclusion, to occupy key original technologies of the Oriental medical device, we need to apply more patent of the whole related technology and international patents.

• Journal of Ceramic Processing Research
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• v.13 no.spc2
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• pp.193-197
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• 2012

Oxygen plasma has been treated on the surface of indium-tin-oxide (ITO) to improve the efficiency of the organic light-emitting diodes (OLEDs) device. The plasma treatment was expected to inject the holes effectively due to the control of an ITO work-function and the reduction of surface roughness. To optimize the treatment condition, a surface resistance and morphology of the ITO surface were investigated. The effect on the electrical properties of the OLEDs was evaluated as a function of oxygen plasma powers (0, 200, 250, 300, and 450 W). The electrical properties of the devices were measured in a device structure of ITO/TPD/Alq3/BCP/LiF/Al. It was found the plasma treatment of the ITO surface affects on the efficiency of the device. The efficiency of the device was optimized at the plasma power of 250 W and decreased at higher power than 250 W. The maximum values of luminance, luminous power efficiency, and external quantum efficiency of the plasma treated devices increase by 1.4 times, 1.4 times, and 1.2 times, respectively, compared to those of the non-treated ones.

• Textile Coloration and Finishing
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• v.16 no.2
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• pp.47-51
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• 2004

A differential refractive index detector was used for monitoring glucose contents in textile processing solutions. The sensitivity of the device was high enough to measure 0.05％ aqueous glucose solution that could not be measured by normal refractive index measurement. The device was set to monitor glucose concentration continuously in real time by measuring differential refractive index and calibrated by standard glucose solutions in a range of 0.1 to 1.0%. The possibility of industrial application of the device was demonstrated by real-time monitoring of glucose concentration in textile processing solutions such as desizing bath and cellulase treatment bath. Both of solutions contained glucose as a major degraded product. The device would be able to control the weight loss of cellulosic fiber during cellulase treatment since the amount of degraded products in a processing bath is proportional to its weight loss.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.23 no.4
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• pp.332-337
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• 2013

This paper presents a subsequent research work on the roller design of IRB(isolation roller bearing) seismic isolation device presented in Part 1 by focusing on heat treatment. The hardness and friction factor are very important factors of material and after-treatment process selection. Normally, roller bearing consists of roller and retainer. The roller gets high pressure constantly, while the retainer gets tensile and compressive stress. Therefore, sensitive material selection and heat treatment of each part is quite important. In this experimental evaluation, carbon steel, chrome special steel and others are employed and their characteristics after heat treatment are identified. Each material is prepared by refining high frequency heat treatment. The friction factor and static load capacity of manufactured material are experimentally identified and destructive test of material is processed. Optimal material and heat treatment conditions for IRB roller bearing are determined based on experiment results.

• Korean Journal of Acupuncture
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• v.24 no.4
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• pp.37-45
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• 2007

Objectives : Temporomandibular joint (TMJ) balance is known to be intricately integrated with nervous system, cervical spine, and meridian system balance. This retrospective study with one-group pretest-posttest design reviewed cervical spine imaging data to provide evidence of spinal alignment improving effect of TMJ balance treatment. Methods : Cervical spine imaging data including computed tomography and simple x-ray of 25 cases with painful condition were reviewed to explore any change in cervical alignment on wearing the intraoral device for TMJ balance treatment of functional cerebrospinal therapy. Results : Cervical spine alignment significantly improved on wearing the intraoral device. Conclusions : TMJ balance treatment improves cervical spinal alignment, which may be a firm basis to proceed with further research of TMJ balance therapy as a way of balancing the whole-body meridian system.

• Journal of Advanced Marine Engineering and Technology
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• v.17 no.4
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• pp.20-27
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• 1993

Emulsified oily wastewater is generally hard to treat in separating oil and water by conventional separators. In this paper the magnetohydrodynamic water treatment device was used to separate oil from emulsified oily wastewater which contained high conductivity. The emulsified oil removal rates and economic ranges of oil separation at various factors were investigated to confirm the influence of the magnetic field in MHD water treatment device according to the characteristics of emulsion brake. Experimental results proved that the oil removal rates were proportional to Lorentz force which depends on the intensity of magnetic field, conductivity and velocity of wastewater.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.60 no.3
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• pp.269-276
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• 2024

In response to the global interest and efforts towards reducing plastic use and promoting resource recycling, there is a growing need to establish methods for recycling discarded fishing gear. In Korea, various technologies are being developed to recycle discarded fishing gear, but significant technical and policy challenges still remain. In particular, biodegradable gill nets require a pre-treatment process to separate biodegradable materials from other substances and to remove salt before recycling. Therefore, this study aims to develop a pre-treatment device for recycling biodegradable gill nets and to evaluate the feasibility of recycling them.

• Journal of Oral Medicine and Pain
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• v.41 no.1
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• pp.7-15
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• 2016

Purpose: Mandibular advancement device (MAD) is widely recognized as an important treatment option for obstructive sleep apnea (OSA) and is readily accepted than any other treatment options owing to its simplicity and ambulatory nature. At this time, there are a multitude of MAD designs and their efficacies may be influenced by adjustment and retention mechanism. The MAD with the anterior connector (anteriorly adjustable mandibular advancement device, AAMAD) was newly developed in the Department of Oral Medicine, Dankook University Dental Hospital (Cheonan, Korea) and was prescribed for the OSA patients including snoring patients. Thus, this study was aimed to objectively investigate the effectiveness of the AAMAD on the OSA patients using the self-applied portable device (ApneaLink), and evaluate the treatment outcomes among patients with various severity of OSA level. Methods: Results of the treatment of fourteen patients (13 male, 1 female) with the AAMAD were retrospectively analyzed. Each patient underwent home sleep test before treatment and were divided into two groups, i.e., those with mild (apnea-hypopnea index [AHI] ${\geq}5$ and <15) to moderate OSA (AHI ${\geq}15$ and <30) and severe OSA (AHI ${\geq}30$). After treatment, home sleep test was conducted again and treatment outcomes were compared between mild to moderate and severe OSA patients. Results: Of all patients, 78.6% showed more than 50% AHI reduction. We found a significant reduction (85.3%) of AHI in the severe OSA patients. Patients with mild to moderate OSA showed the reduced AHI (56.1%). Conclusions: We concluded that AAMAD is an effective oral appliance for the majority of OSA patients.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1419-1426
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• 2008

Fulminant hepatic failure is a clinical syndrome associated with a high mortality rate. Orthotopic liver transplantation is the only clinically proven effective treatment for patients with end-stage liver disease who do not respond to medical management. A major limitation of this treatment modality is the scarcity of donor organs available, resulting in patients dying while waiting for a donor liver. An extracorporeal bioartificial liver (BAL) device containing viable hepatocytes has the potential to provide temporary hepatic support to liver failure patients, serving as a bridge to transplantation while awaiting a suitable donor. In some patients, providing temporary hepatic support may be sufficient to allow adequate regeneration of the host liver, thereby eliminating the need for a liver transplant. Although the BAL device is a promising technology for the treatment of liver failure, there are several technical challenges that must be overcome in order to develop systems with sufficient processing capacity and of manageable size. In this overview, the authors describe the critical issues involved in developing a BAL device. They also discuss their experiences in hepatocyte culture optimization within the context of a microchannel flat-plate BAL device.