• 한국운동역학회지
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• 제22권2호
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• pp.243-251
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• 2012

The purpose of this study was to develop an impact force measurement device in order to facilitate the acquisition of quantitative data for the analysis of various sporting events. The device was designed to include cylindrical aluminum supports of 220 mm diameter, which allows mounting and dismounting of the device on walls and frames. In addition, a hard sponge for impact absorption, as well as 4 springs, were attached to the plate. Both were attached to prevent psychological variables and injuries. When a subject applies force on the device, accurate data about the maximum repulsive force is acquired in real time, with a lag of only 0.001 s. The device was calibrated in four steps: (1) increase, (2) increase, (3) increase-decrease, and (4) increase-decrease. The maximum relative expanded uncertainty was 0.166%, indicating that the impact force measurement was sufficiently reliable. The proposed device can be applied to various sporting situations and is expected to be useful for studying kinetics.

• 동아시아식생활학회지
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• 제22권3호
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• pp.401-407
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• 2012

Baked black soybean has great nutritional value, so it is a great potential ingredient in cake. To find an acceptable ingredient ratio, baked black soybean powder was to wheat flour in different experimental groups. The control was pure wheat flour, and the experimental groups had 0 (control), 10%, 20%, 30%, and 40% baked black soybean powder added. The baked black soybean powder consists of moisture (4.88%), crude protein (34.46%), crude fat (11.35%), crude ash (4.84%), and carbohydrates (44.47%). The specific gravity, spreadability, and baking loss increased with an increase in the amount of baked black soybean powder, but specific volume decreased. The 'L' and 'b' chromaticity values of a sponge cake decrease with increased amounts of added baked black soybean powder. The texture becomes more hard and stuff with added baked black soybean powder, but springiness decreases. A sensory test found the best experimental group to be that of 20% powder added.

• 대한한의정보학회지
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• 제11권2호
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• pp.57-64
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• 2005

Objectives The aim of this study is to evaluate effects of hard board applied to acute low back pain patient by using Visual Analogue Scale(VAS) and Pain Rating Score(PRS). Methods From March. 2005 to October. 2005, 20 cases of acute low back pain were divided into 2 groups in sequence. Control group took a rest on the bed(marble-sponge mattress) and sample group took a rest on the hard board. Visual Analogue Scale(VAS) and Pain Rating Score(PRS) were used to assess the change of pain. VAS and PRS were checked 3 times before the treatment, after 3day treatment and 6day treatment. Results 1. After 3day and 6day treatment, there was statistical significance between control and sample group by VAS. 2. After 3day and 6day treatment, there was statistical significance between control and sample group by PRS. Conclusions On treating acute low back pain, it is more effective taking a rest on the hard board than taking a rest on the bed. Further study is needed about effects of hard board applied to acute low back pain patient.

• Animal cells and systems
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• 제6권4호
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• pp.283-285
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• 2002

Sponges of the family Irciniidae are poorly known in Korean waters. This paper describes a new species of new genus, Bergquistia coreana n. sp. in the family Irciniidae (Demospongiae: Dictyoceratida) from Jejudo Island, Korea from 1998 to 1999. Bergquistra n. gen. is characterized by extremely simple fasciculated and uncored primary fibres. However, in the choano-somal region, primary fibres are made of wider clear web. Secondary fibres form a very thin regular uncored network. The sponge surface has thick and regular conules. The colour is beige throughout the sponge, and the texture is slightly hard and compressible. Thickness of filament is variable.

• 대한기계학회논문집A
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• 제23권7호
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• pp.1155-1163
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• 1999

This study deals with the vibration ride quality for passenger car when running on straight highway at the speed of 70km/h. Ten accelerations were measured at four positions, three axes each at the feet, hip, and head, and one axis at the back. Five seats that have different static sponge stiffness were used, and two subjects were participated. These accelerations were analyzed to produce the ride values such as component ride value and overall ride value. It was hard to see the difference of ride value by the change of sponge stiffness. However we could rank the ride quality by the total vibration exposed to passengers. From the transfer function between the hip and the foot, the fundamental mode was observed to be around 5.8Hz. Also the transfer function between the head and hip was studied. The optimal damping ratio of the seat was calculated according to the seat natural frequency with human weighting filter which makes the optimal damping ratio different from that without weighting filter.

• 한국식품과학회지
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• 제21권4호
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• pp.521-527
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• 1989

국산 소맥의 제분성(製粉性), 이화학적(理化學的) 특성(特性), 리올로지 성질, 제품적성(製品適性)을 미국산 소맥과 비교 검토하였다. 공시품종(品種)의 제분률(製粉率)은 한국산이 71.1%, 미국산이 71.6%로서 비슷하였으며, 한국산 3개 품종(品種)의 AWRC는 평균 61.8%로서 경연질(硬軟質) 소맥의 분류기준인 60%를 상회하는 선에 있었다. 한국산 소맥의 쿠키직경(直徑)은 $8.5{\sim}8.9cm$로서 비교적 좋은 cookie spread를 보였으며 top grain score도 우수하였다. Sponge cake의 부피는 $975{\sim}1,175cc$로서 표준분(標準粉)에 비하여 약 $4{\sim}20%$의 차이가 있었으나 제품(製品)의 평점은 도리어 미국산 소맥보다 높았다. 특히 원광은 쿠키 및 스폰지케익의 적성(適性)이 우수한 품종(品種)으로 선발되었다. 빵의 부피는 $924{\sim}l,055cc$의 범위로서 영광이 1,020cc로 제(製)빵용 표준분을 제외한 공시 품종(品種) 중 제(製)빵적성(適性)이 가장 우수하였으며, 제(製)빵을 위한 제(製)빵용 표준분(標準粉)에 대한 국산 소맥분의 적정혼합비율(適正混合比率)은 30%이었다.

• Fisheries and Aquatic Sciences
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• 제12권3호
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• pp.236-239
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• 2009

We describe Ophichthus asakusae from Korea based on a single specimen (426.0 mm TL) collected from the southern sea off Jeju Island. The species is characterized by a pointed, hard, sponge-like tail tip without a caudal fin and 126-132 total vertebrae. We propose a new Korean name, "Je-ju-ba-da-baem" for the species.

• 대한의용생체공학회:의공학회지
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• 제10권3호
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• pp.279-284
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• 1989

Measurement of cardiac output during exercise by noninvasive technique is very needed in the area of sports medicine. However there are only two noninvasive techniques, one of which is $CO_2$ subscript rebreathing technique and the other one is impedance cardiography. While $CO_2$ rebreathing technique needs special breathing and metablic steady state, impedance cardiography has motion Uiiau problem. In this study maior sources of the mothion artifact during treadmill exercise was found experimentally to. be the impact caused by each step on the treadmill. Thus special shoes to reduce the impact were developed. These are the shoes with silicon rubber and hard sponge attached to the soles. It was possible to measure cardiac output with the newly developed shoes for Burke protocol whose speed of the treadmill was constant 3.5 miles/hour while it was impossibel with the conventional exercise shoes.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1994년도 춘계학술대회논문집; 영남대학교, 20 May 1994
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• pp.206-211
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• 1994

본 연구에서는 임의의 복소 음압 분포를 무한 평면에서 공간상의 Fourier 변환을 하여서 평면파 요소들의 중첩으로 해석하는 방법을 살펴보고 제한된 측정 조건에서 유발되는 문제들을 음원의 주파수에 대해서 모의 실험을 통하여 고찰해보았다. 실험으로는 단단한 시편(hard panel)과 스폰지(sponge)에 대해서 공간상의 fourier 변환을 통해 반사 계수를 얻고 수직입사에 대해 2-마이크로폰 방법으로 구한 반사계수와 비교하였다. 특히 다공성 물질인 스폰지에 대해서는 유동 저항을 측정하여 실험식으로부터 구한 반사 계수와의 비교를 하였으며 공간상의 음압 분포로부터 구한 반사계수에서 창문함수의 영향을 살펴보았다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2009년도 추계학술발표대회
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• pp.18.2-18.2
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• 2009

Ceramics have some properties that are unmatched by other kind of materials like metals or polymers. The ability of high thermal and chemical resistance and in case of being superior in specific mechanical properties makes the ceramic materials suitable for arange of applications. The microstructure and morphology of a material arguably permit the use of many advanced application otherwise difficult to achieve.Porous structures have some important applications in biomedical and environmental field. For human hard tissue reconstruction and augmentation procedure suitable biomaterials are used with a desirable porosity. A range of porous bioceramics were fabricated with tailored design to meet the demand of specific applications. Channeled and interconnected porosity was introduced in alumina, zirconia, and hydroxyapatite or tri calcium phosphate ceramics by different methods like multi-pass extrusion process, bubble formation in viscous slurry,slurry dripping in immiscible liquid, sponge replica method etc. The detailed microstructural and morphological investigations were carried out to establish the unique features of each method and the developed systems. For environmental filters the porous structures were also very important. We investigated a range of channeled and randomly porous silicon based ceramic composites to enhance the material stability and filtration efficiency by taking advantage of the material chemistry of the element. Detailed microstructural and mechanical characterizations were carried out for the fabricated porous filtration systems.