• 대한조선학회논문집
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• 제55권1호
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• pp.22-27
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• 2018

Ships strengthened for navigation in ice encounter level ice, ice ridge and broken ice fields. Thus, the ship resistance in ice is a very critical concern to the designers of ice-going vessels. The objective of this study is to understand the physical aspects of ship performance in ice and to investigate the characteristics of the ship resistance in broken ice channels. In particular, this study identifies the ship resistance in ice associated with the broken ice channel width and the size of broken ice pieces. Model testings of towed-resistance condition in broken ice channels with three ship speeds were conducted in KRISO ice model basin. The influence of the ship resistance characteristics in broken ice channels for channel width and size of broken ice pieces was analyzed.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제32권6호
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• pp.567-572
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• 2010

Intraoperative breakage of instruments can be occurred unexpectedly. To prevent damage of neighboring important anatomic structures and consequent complications, broken instruments should be removed as soon as possible. There have been several methods to remove broken instruments. One of them is the Carm fluoroscopy which is commonly used for locating metal foreign bodies. However, its application for removal of broken instruments in the oral and maxillofacial area is not common. In our experiences with the removal of two broken instruments in mandibular area, the newly developed dental mini C-arm was used to find broken instrument in soft tissue, because it gives real-time in situ information for the intraoperative location. We report two cases with broken instruments, a broken dental needle in the pterygomandibular space and a broken straight bur in the mandibular angle area. They were identified and could be removed safely using a dental mini C-arm.

• 아동학회지
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• 제13권1호
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• pp.99-111
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• 1992

The purpose of this study is to investigate how the broken home influence the personality development. in comparison of the personal characters of the child of broken home with those of the child of normal home. The subjects of this study were III broken homes children and 183 normal homes children of 5th grade. sampled from elementary schools in Busan. The instrument used in this study was the character inventory prepared by Lee Sang Rho. etc. The result of the personality test was compared according to each variable(as follws)and the mean(M) standard deviation(SD) and T -test were obtained. The result of the analysis are as follows: 1. The child of normal homes is superior in superiority than the child of broken homes 2. The boys of mormal homes are superior in sociability than the boys of broken homes, boys of broken homes, but there was no outstanding difference between the girls of normal homes and the girls of broken homes. 3. In the case of extended family. there was no outstanding difference between the child of normal homes and the child of broken homes, but in the case of nuclear family. the child of normal homes is superior in sociability and superiority than the child of broken homes. 4. In the case of only child homes, there was no outstanding difference between the child of normal homes and the child of broken homes, but in the case of sibling child homes. the child of normal homes is superior in sociability and superiority than the child of broken homes.

• Geomechanics and Engineering
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• 재33권6호
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• pp.553-565
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• 2023

As the structure of broken rock mass is complex, with obvious discontinuity and anisotropy, it is generally necessary to reinforce broken rock mass using grouting in underground construction. The purpose of this study is to experimentally investigate the mechanical properties of broken rock mass after grouting reinforcement with consideration of the characteristics of broken rock mass (i.e., degree of fragmentation and shape) and a range of reinforcement methods such as relative strength ratio between the broken rock mass and cement-based grout stone body (λ), and volumetric block proportion (VBP) representing the volumetric ratio of broken rock mass and the overall cement grout-broken rock mass mixture after the reinforcement. The experimental results show that the strength and deformation of the reinforced broken rock mass is largely determined by relative strength ratio (λ) and VBP. In addition, the enhancement in compressive strength by grouting is more obvious for broken rock mass with spherical shape under a relatively high strength ratio (e.g., λ=2.0), whereas the shape of rock mass has little influence when the strength ratio is low (e.g., λ=0.1). Importantly, the results indicate that columnar splitting failure and inclined shear failure are two typical failure modes of broken rock mass with grouting reinforcement.

• 대한안전경영과학회지
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• 제10권4호
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• pp.105-109
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• 2008

The purpose of this study is to distinguish the causes of broken glass on doors or windows when it is originally kept among the remains on the floor in fire site - whether it was broken due to heating or outer power-through test and characteristics of the broken plane including the pattern on the plane. Addition to it, the study tries to find characteristics to judge the point and direction of breakdown through the analysis of glass broken by outer power. With two assumed causes - a) breakdown due to heating and b) breakdown due to outer power-3 pieces of glass plates ($30cm{\times}30cm{\times}5mm$) were tested for each case, getting the results as following: First, for the glass broken due to the change of temperature, the broken plane is of slow and smooth curve without any pattern. Second, for the glass broken due to outer power, with the impact point as the center, the glass shows breakdown of radial type and the side shows breakdown of near-perpendicular type. The far the broken piece is from the impact point, the bigger the size is. The broken piece at the impact point is of long triangle type and the two long planes of the triangle shows semi-arc with the center of breakdown point and the other plane shows opposite pattern. Third, when glass that is damaged by outer power is heated, damaged forms and side patterns of the glass that is damaged by outer power are heated and disappeared.

• 한국철도학회논문집
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• 제20권2호
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• pp.190-195
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• 2017

본 논문에서는 임피던스 측정을 통한 레일절손을 검지하는 방법에 대해서 제시하도록 한다. 일반적으로 레일절손은 궤도회로를 통해 실시간으로 판단을 하나 궤도회로를 사용하지 않고 레일의 임피던스를 측정함으로 인해서 절손유무와 절손위치를 추정하였다. 레일의 한쪽에 병렬공진을 발생시켜 전기적으로 절연을 함으로써 다른쪽 레일의 임피던스가 측정되도록하였다. 측정된 임피던스가 인덕턴스 성분을 가지면 레일의 절손이 존재하지 않으며, 캐패시턴스 성분을 가지면 레일의 절손이 발생하게된다. 전송선로모델을 이용하여 제시한 구조를 모델링하였으며, 모델링을 통해 임피던스 값에 따라 절손위치가 추정가능함을 보였다. 실제 60m 레일 모형에 대해서 제안한 방법으로 임피던스를 측정하였으며, 임피던스 값에 따라 절손유무가 판단이 되는 것을 확인하였다.

• 한국화재조사학회지
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• 제3권1호
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• pp.12-15
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• 2003

The purpose of this study is to distinguish the causes of broken glass from doors or windows when it is found being originally kept among the remains on the floor in fire site - whether it was broken due to heating or by outer power through test and the properties of the broken plane including the pattern on the plane. Addition to it, the study tries to find characteristics for judging the point and direction of breakdown through the analysis of glass broken by outer power. With two causes assumed - a. breakdown due to heating and b. breakdown due to outer power - 3 pieces of glass plates $(30cm{\times}30cm{\times}5mm)$ for each case were tested, getting the results as following: 1. For the glass broken due to the change of temperature The broken plane is of slow curve and smooth without any pattern. 2. For the broken due to outer power With the impact point as the center, the shows breakdown of radial type and the side shows breakdown of near-perpendicular type. The far the broken piece is from the impact point, the bigger the size is. The broken piece at the impact point is of long triangle type and the two long planes of the triangle shows semi-arc with the center of breakdown point and the other plane shows opposite pattern 3. Change of the pattern and type of the glass due to outer power The pattern and type of the glass due to outer power shows change due to heatihg.

• Animal Bioscience
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• 제34권8호
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• pp.1331-1341
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• 2021

Objective: This study aimed to determine the effects of replacing cassava chips with broken rice in a fermented total mixed ration diet on silage quality, feed intake, ruminal fermentation, growth performance, and carcass characteristics in the final phase of fattening beef cattle. Methods: Eighteen Charolais-Thai native crossbred steers (average initial body weight: 609.4±46 kg; average age 31.6 mo) were subjected to three ad libitum dietary regimes and were maintained in individual pens for 90 d before slaughter. The experimental design was a randomized complete block design by initial age and body weight with six replicates. The dietary regimens used different proportions of broken rice (0%, 16%, and 32% [w/w] of dry matter [DM]) instead of cassava chips in a fermented total mixed ration. All dietary treatments were evaluated for in vitro gas production and tested in in vivo feeding trials. Results: The in vitro experiments indicated that organic matter from broken rice was significantly more digestible than that from a cassava-based diet (p<0.05). Silage quality, nutrient intake, ruminal fermentation characteristics, carcass fat thickness, and marbling score substantially differed among treatments. The ruminal total volatile fatty acids, propionate concentration, dietary protein intake, and digestibility increased linearly (p<0.05) with broken rice, whereas acetate concentration and the acetate:propionate ratio decreased linearly (p<0.05) with broken rice (added up to 32 g/kg DM). Broken rice did not influence plasma metabolite levels or growth performance (p>0.05). However, the marbling score increased, and the carcass characteristics improved with broken rice. Conclusion: Substitution of cassava chips with broken rice in beef cattle diets may improve fattened beef carcass quality because broken rice increases rumen fermentation, fatty acid biosynthesis, and metabolic energy supply.

• 한국식품과학회지
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• 제36권2호
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• pp.276-282
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• 2004

쌀보리와 거의 유사한 식품학적 특성을 지니지만 활용도가 극히 낮은 보리 파쇄립을 이용하여 압출성형에 의한 보리 후레이크를 개발하였다. 압출성형시 $100^{\circ}C$ 이상의 온도, 35% 이상의 수분함량에서 파쇄립이 충분히 호화되었으며, 메성보리 파쇄립의 경우 찰성보리에 비해 절단성, roll 분리성 등이 우수하였다. 메성 및 찰성보리 파쇄립의 혼합비율을 달리하면서 압출성형하여 제조한 pellet의 특성을 조사한 결과 찰성보리 파쇄립의 혼합비율이 증가할수록 RVA 상의 최고점도가 감소하였고 또한 겉보기 점도와 항복력이 감소한 반면 유동지수는 증가하였다. 그리고 이를 oil frying하여 제조한 후레이크의 특성을 조사한 결과 찰성보리 파쇄립의 혼합비율이 증가함에 따라 압착강도와 bulk density가 크게 감소하였고 단면상에서의 air cell 크기가 커지고 cell을 이루는 body가 얇아지는 것으로 나타났다. 그리고 관능검사 결과 찰성보리 파쇄립의 혼합비율이 증가할수록 조직감과 맛에 대한 기호도가 증가하였고 메성과 찰성보리 파쇄립의 혼합비율 (60-70):(30-40) 처리구의 경우 관능적으로 가장 바람직한 것으로 나타났다.

• 대한가정학회지
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• 제42권12호
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• pp.191-204
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• 2004

The purpose of this study was to examine emotional and behavioral problems of children from broken families. The subjects of the study were 200(100girls, 100boys) 5th and 6th grade children from P city in Kyuug-gi area. The main results were as follows; First, children from broken families showed some behavior problems such as aggressiveness, anxiety, developmental disorder, absences from school, bad-habits and attention-seeking behaviors. The parenting behaviors of broken families were characterized as negative, rejective, and inconsistent behaviors. Second, emotional and behavioral problems of children from broken families varied as a function of child sex, care giver, reason of loss and parenting.