• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.2
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• pp.702-723
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• 2020

The application of machine learning (ML) in intrusion detection has attracted much attention with the rapid growth of information security threat. As an efficient multi-label classifier, kernel extreme learning machine (KELM) has been gradually used in intrusion detection system. However, the performance of KELM heavily relies on the kernel selection. In this paper, a novel multiple kernel extreme learning machine (MKELM) model combining the ReliefF with nature-inspired methods is proposed for intrusion detection. The MKELM is designed to estimate whether the attack is carried out and the ReliefF is used as a preprocessor of MKELM to select appropriate features. In addition, the nature-inspired methods whose fitness functions are defined based on the kernel alignment are employed to build the optimal composite kernel in the MKELM. The KDD99, NSL and Kyoto datasets are used to evaluate the performance of the model. The experimental results indicate that the optimal composite kernel function can be determined by using any heuristic optimization method, including PSO, GA, GWO, BA and DE. Since the filter-based feature selection method is combined with the multiple kernel learning approach independent of the classifier, the proposed model can have a good performance while saving a lot of training time.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.22 no.1
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• pp.1-7
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• 2013

Pneumatic cylinders are widely used to actuators in automatic equipments because they are relatively inexpensive, simple to install and maintain, offer robust design and operation, are available in a wide range of standard sizes and design alternatives. This paper presents a comparative study among the dynamic characteristics of meter-out and meter-in speed control of pneumatic cushion cylinders with a relief valve type cushion mechanism. Because of the nonlinear differential equations and a requirement for simultaneous iterative solution in a mathematical model of a double acting pneumatic cushion cylinder, a computer simulation is carried out to investigate pressure, temperature, mass flow rate in cushion chamber and displacement and velocity time histories of piston under various operating conditions. It is found that the piston velocity and pressure response in meter-in speed control are more oscillatory than with meter-out those when pneumatic cushion cylinders are driven at a high-speed. In meter-out speed control, the effective area of the flow control valve is larger than that of meter-in, and the supply pressure has to be much higher than the pressure required to move the load because it has also to overcome the back pressure in cushion chamber.

• Journal of Korea Multimedia Society
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• v.19 no.12
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• pp.1919-1926
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• 2016

The people who complain of pain due to voice causes such as vocal cord nodules is increasing year by year. If the voice is changed, it is possible to give to colleagues discomfort or inconvenience during conversation. In this paper, we propose a way to reduce discomfort by improving the husky voice during the conversation. A VBF (voice boosting filter) is firstly designed to improve the husky voices. This filter may further emphasize the formant frequency components than the frequency components around the formant frequency, because the value is relatively greater than the other frequency. And a fixed-point type DSP chipset, TMS320F2812 is applied to the system, the operating frequency is 150MHz. The system was implemented as a compact for use as a portable, its size is $2.5cm{\times}10cm$. Through the test using three husky voices with some type of statement, it was satisfactory in processing speed and sound quality improvement.

• Proceedings of the Korean Geotechical Society Conference
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• 2006.03a
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• pp.34-41
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• 2006

A 3-dimensional stress measurement system based on the bore hole bottom deformation method, which is one of the stress relief methods, was developed. A pilot bore hole is drilled from the bottom of a bore hole and the stress meter is inserted into the pilot bore hole in the method. The bore hole is advanced as an over coring and the deformations in seven directions are measured by cantilever type-sensors. Using the cantilever type-sensors saves time for hardening of glue. No cable connection between the stress meter and a data logger is necessary since a compact data logger is installed in the stress meter. The accuracy of the stress meter was confirmed by a biaxial test for a Shikotsu welded tuff block although in-situ tests have not been carried out yet.

• Journal of East-West Nursing Research
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• v.14 no.2
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• pp.67-73
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• 2008

Purpose: The purpose of this study was to examine the effect of Kynesio-taping therapy (KTT) on chronic joint pain among community-dwelling older adults. Methods: A pre-experimental design was used. KTT was employed on 23 consenting community older adults visiting a community center. KTT was applied on the painful joint for 3-4 days. Pain was evaluated using the visual analogue scale. Results: Frequent locations of pain were waist (43.8%), knee (28.1%), shoulder (12.4%), and head (9.4%). Time of severe pain during the day was mid-day (47.8%), early morning (21.7%), and evening (13.0%). Pain relief management included hospital visitation (65.2%), medication (17.4%), and application of a poultice (13.0%). Pain scores were significantly decreased after KTT compared to pretest scores acquired prior to taping (p<.001). Conclusions: KTT is a cost-effective, easy-to-use, and effective form of pain relief in older adults with chronic joint pain. Clinical practitioners can consider KTT as a complementary method of chronic pain control in older adults.

• The Journal of Korean Medical History
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• v.33 no.1
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• pp.11-20
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• 2020

The Office for Saving Lives (活人署) (OSL) was the office in charge of the treatment and relief of the poor in the Joseon Dynasty. This study disputes prior scholarship on the OSL by analyzing the use of a ready-made prescription and by focusing on the personality of the OSL's medical institutions. The work of the three government offices, the Office of Great Mercy (大悲院) (OGM), which was the formal office of OSL, the Office of Benefiting People (惠民署) and the Office of Aiding Life (濟生院), overlapped in the area of relief of the common people. But OGM was different from the other two in that it was not a purely medical office, had no educational function, and did not manage medicine. By analyzing a standing prescription, this article argues: 1) Heojun's influence on the composition of a standing prescription is absolute. 2) Epidemic warm disease (溫疫) was a major social problem in terms of emergency medical care at the time. 3) In the late Joseon Dynasty, the treatment of epidemic warm diseases became more sophisticated than the previous era.

• The Korean Journal of Pain
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• v.19 no.2
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• pp.249-252
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• 2006

Postlaminectomy syndrome is characterized by persistent low back pain and radiculopathy of the legs after surgery of the spine. Pseudomeningocele is an uncommon cause of postlaminectomy syndrome; it is characterized by an extradural collection of cerebrospinal fluid (CSF) without dural covering, resulting from unrecognized dural tears at the time of lumbar surgery. In most cases, surgery to repair a pseudomeningocele is recommended. However if surgical treatment does not yield symptomatic relief, then conservative treatment should be considered. We treated a patient with a pseudomeningocele after spine surgery in which selective transforaminal epidural block produced long-term relief of symptoms. Here we describe the management of this patient.

• Journal of Arbitration Studies
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• v.28 no.2
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• pp.45-66
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• 2018

Two years ago, an emergency arbitrator procedure in accordance with the international arbitration rule has been finally adopted in Korea?a decade after its introduction. Arbitral institutions provide interim measures in the course of tribunal proceedings to avoid litigation in open court that is often expensive and time-consuming. An emergency arbitrator procedure offers an urgent relief prior to the constitution of an arbitral tribunal, thus enhancing the speed and effectiveness of the arbitration procedure even further. Although most of the arbitral institutions interpret that the emergency arbitration rulings are binding on the parties, enforcing the emergency arbitration provisions have some difficulties in practice, and it is not clear whether or not arbitral interim measures will be enforceable under the newly adopted provisions in Korea. In this study, experiences in other countries are explored in seeking for the possible problems and solutions of enforcing the emergency arbitration rulings. For example, Singapore and Hong Kong insert terms such as "finality," "enforceable in the same manner as an order or direction of the Court," "same effect as an arbitral tribunal or interim measures" in their emergency arbitrator legislation to enhance enforcement. Moreover, "urgency inherent" are considered.

• The Korean Journal of Pain
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• v.24 no.1
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• pp.48-52
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• 2011

Occipital neuralgia is usually defined as paroxysmal stabbing pain in the greater or lesser occipital nerve (GON or LON) distribution. In occipital neuralgia patients, surgical considerations are carefully taken into account if medical management is ineffective. However, identification of the occipital artery by palpation in patients with thick necks or small occipital arteries can be technically difficult. Therefore, we established a new technique using transcranial Doppler (TCD) sonography for more accurate and rapid identification. The patient was a 64-year-old man who had undergone C1-C3 screw fixation and presented with intractable stabbing pain in the bilateral GON and LON distributions. In cases in which pain management was performed using medication, physical therapy, nerve block, or radiofrequency thermocoagulation, substantial pain relief was not consistently achieved, and recurrence of pain was reported. Therefore, we performed occipital neurectomy of the bilateral GON and LON by using TCD sonography, which helped detect the greater occipital artery easily. After the operation, the patient’s headache disappeared gradually, although he had discontinued all medication except antidepressants. We believe that this new technique of occipital neurectomy via a small skin incision performed using TCD sonography is easy and reliable, has a short operative time, and provides rapid pain relief.

• Transactions of the Korean Society of Automotive Engineers
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• v.23 no.6
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• pp.583-590
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• 2015

Automobile crash optimization is nonlinear dynamic response structural optimization that uses highly nonlinear crash analysis in the time domain. The equivalent static loads (ESLs) method has been proposed to solve such problems. The ESLs are the static load sets generating the same displacement field as that of nonlinear dynamic analysis. Linear static response structural optimization is employed with the ESLs as multiple loading conditions. Nonlinear dynamic analysis and linear static structural optimization are repeated until the convergence criteria are satisfied. Nonlinear dynamic crash analysis for frontal analysis may not have boundary conditions, but boundary conditions are required in linear static response optimization. This study proposes a method to use the inertia relief method to overcome the mismatch. An optimization problem is formulated for the design of an automobile frontal structure and solved by the proposed method.