• Journal of the Korea institute for structural maintenance and inspection
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• v.18 no.5
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• pp.59-67
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• 2014

In tension lap splices of straight deformed bars, KCI Code (KCI2012) and ACI Code (ACI318-11) requires that the lap lengths for class B splice are 1.3 times as development length. KCI2012 contains development length provisions for the use of headed deformed bars in tension and does not allow their tension lap splices. The purpose of this experimental study is to evaluate that KCI2012 equation for the development length, $l_{dt}$, of headed bars can be used to calculate the lap length, $l_s$, of headed deformed bars in grade SD400 and SD500, having specified yield strength of 400 and 500 MPa. Test results showed that specimens with $l_s$ equal to $1.3l_{dt}$ had maximum flexural strengths as 1.16~1.31 times as the nominal flexural strengths, flexural failure mode, and ductility. These observations indicate that $1.3l_{dt}$ is suitable to the tensile lap length of headed deformed bars in grade SD400 and SD500.

• Korean journal of food and cookery science
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• v.30 no.3
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• pp.340-350
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• 2014

The physicochemical and sensory properties of bean sprouts with different namulkong cultivars were examined. The five namulkong cultivars included were as follows : Nokchaekong, Dawonkong, Seonamkong, Orialtae, and Pungsannamulkong with light green, black, yellow, dark green, and yellow seed coats, respectively. The bean sprouts were cultivated in a lab and were used for analyses. The instrumental textural hardness and lipoxygenase activity of the heads were higher than those of the stems in both fresh and boiled bean sprouts. The 3 minutes of boiling caused a decrease in the hardness and lipoxygenase activity of the heads and the stems. The chlorophyll a and b contents in the heads were higher than those in the stems, and they decreased with boiling. The fresh bean sprouts with Dawonkong, Seonamkong and Pungsannamulkong showed higher acceptability than those with Nokchaekong and Orialtae. The higher acceptability was observed in the boiled and flavored bean sprouts with Seonamkong and Pungsannamulkong.

• Journal of Convergence for Information Technology
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• v.7 no.5
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• pp.47-51
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• 2017

The purpose of this study was to investigate the effect of wearable sensor wear on the muscle contraction of cervical erector spinae and upper trapezius causing the forward head posture induction in order to reduce the stress induced by the use of smartphone. This study was to investigate the muscle activity of healthy adults in the 20th to 30th generations by dividing them into the control group using the smartphone, the non-wearing group conscious the posture of the head posture, and the wearing group wearing the wearable sensor. There were no differences in muscle activity between cervical erector spinae and upper trapezius compared to the control, non - wearing, and wearing groups. In addition, the changes in muscle activity of cervical erector spinae muscles were increased in all groups, but the muscle activity of upper trapezius muscles were in the wear group compared to the non-wear group and the control group, but there was no statistical significance. That is, wear of the wearable sensor may be effective in controlling the conscious posture, but it may cause the compensation of another part.

• Journal of Veterinary Clinics
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• v.28 no.5
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• pp.526-529
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• 2011

The brachiocephalic trunk (Bct) branches from the aortic arch (Aa) and consists, in ruminants, of the common trunk of the left subclavian artery (LSb), the bicarotid artery (Bc) or left and right common carotid artery (LCc and RCc), and the right subclavian artery (RSb). This pattern differs from the primitive mammalian Aa pattern due to the fact that the analogs of the LCc and LSb migrate cranially and merge with the common trunk of the RCc and RSb in the embryonic stage. A Bct having a septal remnant that consisted of the tunica media was observed in a female Korean water deer (Hydropotes inermis argyropus), which was deemed to have resulted from an incomplete merging of the vessel walls between a carnivoran-type Bct and an incomplete LSb. This is the first report of an abnormal Bct in a Korean water deer.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.3
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• pp.381-386
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• 2008

Virtual 3D audio methods that create 3D sound effects are researched highly for multimedia devices using 2 speakers or headphone. The most typical method to create 3D effects is a technology through use of head related transfer function (HRTF) which contains the information that sound arrives from a sound source to the ears of the listener. But it can decline some 3D effects by cone of confusion between front and back directions due to the non-individual HRTF depending on each listener. In this paper, we propose a new method to use psychoacoustic theory that creates realistic 3D audio. In order to improve 3D sound, we calculate the excitation energy of each symmetric HRTF and extract the ratio of energy of each bark range. Informal listening tests show that the proposed method improves the front-bach sound localization characteristics much better than the conventional methods.

• Journal of Convergence for Information Technology
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• v.9 no.12
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• pp.208-215
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• 2019

The purpose of this study was to investigate the effects of deep neck flexion exercise(DNFE) and thoracic range of motion exerecise(TROM) on the pain and forward head position(FHP) in stroke patients. Thirty-six patients were randomly assigned to DNFE group, TROM group, and control group. pre and post intervention, pain(VAS), Craniovertebral angle(CVA), cranial rotation angle(CRA), FHP, and TROM were measured. As a result. The DNFE group and the TROM group showed significant differences in VAS, CVA, CRA, FHP, and TROM pre and post intervention(p <.05), and the two groups showed VAS, CVA, CRA, FHP, and TROM compared to the control group (p <.05). In conclusion, in patients with stroke, DNFE and TROM were effective in restoring FHP and neck pain. We hope that they will be used in the interventional program for stroke patients in clinical practice.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.6
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• pp.68-75
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• 2021

In this study, the anchoring performance of 57mm headed bars anchored at the external beam-column joint under cyclic loading was evaluated. A total of 6 external beam-column joint test specimens were planned, and anchorage performance was evaluated by setting concrete compressive strength, side covering thickness, lateral reinforcement ratio, and fracture type as major experimental variables. As result of cyclic loading test, it was found that the factors that had the greatest influence on the anchoring capacity of the large-diameter headed bar anchored at the joint were the side cover thickness and the transverse reinforcing bar. It was confirmed that the 57mm large-diameter headed bar anchored at the external beam-column joint showed sufficient anchoring capacity even under cyclic loading.

• The Journal of the Acoustical Society of Korea
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• v.28 no.8
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• pp.714-722
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• 2009

This paper presents a new sound source externalization algorithm for increasing spaciousness and presence on earphone or headphone environments. To do this, we used modified head related transfer functions (M-HRTFs) and room impulse responses acquired by an acoustic simulation method. M-HRTFs developed by ETRI have less tone color distortion of original sound sources than traditional HRTFs. The acoustic simulation method is used to obtain more natural reflected sound. To verify the proposed externalization algorithm, we performed a listening test. From the test, the proposed algorithm is effective in externalizing the sound sources especially when they are on the left and right sides.

• Journal of the Korean Society of Radiology
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• v.83 no.5
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• pp.1153-1159
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• 2022

Dolichoectasia is an uncommon disorder characterized by the presence of a dilated, elongated, and tortuous cerebral artery. Its main pathologic mechanism is the disruption of the internal elastic lamina. Risk factors for dolichoectasia are advanced age, chronic hypertension, and metabolic disease. It mainly involves the vertebrobasilar vasculature (or "posterior circulation"), but dolichoectasia can also be seen in the anterior circulation, particularly the anterior cerebral artery. There are no reported cases of dolichoectasia involving both anterior and posterior circulation in South Korea. Here we report an unusual case of dolichoectasia involving both anterior and posterior circulation in a young female without any underlying disease on the basis of prominent imaging findings.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.307-309
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• 1999

입체음향이란 음원의 위치에 따라 두 귀에 입력되는 신호를 제어함으로써 시각정보 없이 음상의 위치를 파악할 수 있는 음이다. 헤드폰을 이용하면 음장이 머리 내에 위치하게 됨으로써 거리를 파악하는 것이 매우 힘들다. 본 논문에서는 모노음을 이용하여, 2채널 헤드폰에서 재생할 수 있는 3차원 음을 만들기 위하여 Interaural Time Difference(ITD)와 Interaural Intensity Difference(IID)를 이용한 머리 전달함수(Head Related Transfer Function:HRTF)를 만든 결과와 측정 HRTF 자료인 KEMAR Data를 이용한 결과를 비교하였으며, 거리 효과를 효과적으로 구현하기 위하여 잔향효과를 추가하여 음장을 머리밖으로 꺼냄으로써, 보다 향상된 3차원 음상 제어 시스템을 제안하고 실험하였다.