• Journal of the Society of Naval Architects of Korea
• /
• v.30 no.2
• /
• pp.161-176
• /
• 1993

For the purpose of assessing structural integrity at a level of complexity and accuracy appropriate for the situation, integrity assessment methods are formulated with the following methods. One is three-tier assessment method of the revised BSI PD 6493 which considers stable crack growth effect, the others are limit load analysis which estimates the plastic collapse load and stability assessment method which considers stable crack growth of ductile material exactly using J-integral and tearing modulus. Besides, integrity assessments for center cracked panel(CCP) specimen and the circumferential through-cracked pipe are carried out and reliability analysis is accomplished by the first order reliability method which is one of the conventional reliability methods. Also the accuracy of the present method is verified by Monte Carlo method.

• Elastomers and Composites
• /
• v.7 no.1
• /
• pp.21-37
• /
• 1972

We have studied the blending effects of Diene NF 35R and Turfdene 1000R at various blending ratios 100/0, 70/30, 50/50, 30/70, 0/100, and of carbon black NAF and ISAF at various compounding ratios of 55 PHR, 65PHR, 75PHR for tyre tread rubber. As the results, it was found that; 1. For tyre tread rubber, as the blending ratio, Diene NF 35R/Turfdene 1000R, indicated 30/70, the physical properties we examined were most excellent. 2. Excellent result was obtained in case of carbon black compounding ratio of 63PHR. The compounding of ISAF made better result than that of HAF for tensile strength, tearing strength, and abrasion quantity. 3. Heat buildup obtained from compounding carbon black HAF indicated low temperature than that from compounding carbon black ISAF. As the compounding amount of carbon black increased, the heat buildup improved, and as the blending amount of Diene NF 35R decreased, the heat buildup dropped. 4. Carbon black was more efficient to Turfdene 1000R than to Diene NF 35R. 5. In this pysical properties, mooney viscosity, and mooney scorch time, as the compounding amount of carbon black increased, the values of mooney viscosity increased, but that of mooney scorch time dropped.

• The Research Journal of the Costume Culture
• /
• v.10 no.4
• /
• pp.461-472
• /
• 2002

The purpose of this study was to analyze the expressive style of radical feminism and post-modern feminism appearing on the contemporary denim fashion by examining pictures from professional fashion magazine Vogue. For this study, I investigated documents to study the characteristic of radical feminism and post-modern feminism and classified the contemporary denim fashion into erotic look, endrogynous look and deconstructive look. The results of study on the expression style of feminism reflected on the contemporary denim fashion were as follows: First, radical feminism emphasizes that women's sexual feature is never inferior to men's. Therefore in denim fashion, erotic style which emphasize on women's sexual beauty is represented by making hot pants, mini skirt, halter blouse of denim and by using colored jeans and flower print or beads on denim. Second, post-modern feminism has been represented by disregarding or intergrating the existed rule as refusing sexual discrimination. It has been represented in fashion as an endrogynous style by representing neutral gender image. Today, it is represented in denim fashion by mixing a different fabric with denim and matching womanish design with mannish design. Third, post-modem feminism are classified into unfixed expression of genders and the deconstructive expression of methodology. The deconstructive expression of denim fashion is represented by using the damage of fabric by making a hole or tearing intentionally or fraying edge of denim. Also the unfinished designs and transformed dressing are used to express the deconstructive character in denim.

• Structural Engineering and Mechanics
• /
• v.32 no.2
• /
• pp.351-370
• /
• 2009

This paper presents a computational study for the structural response of blast loaded metallic sandwich panels, with the emphasis placed on their failure behaviours. The fully-clamped panels are square, and the honeycomb core and skins are made of the same aluminium alloy. A material model considering strain and strain rate hardening effects is used and the blast load is idealised as either a uniform or localised pressure over a short duration. The deformation/failure procedure and modes of the sandwich panels are identified and analysed. In the uniform loading condition, the effect of core density and face-sheets thicknesses is analysed. Likewise, the influence of pulse shape on the failure modes is investigated by deriving a pressure-impulse (P-I) diagram. For localised loading, a comparative study is carried out to assess the blast resistant behaviours of three types of structures: sandwich panel with honeycomb core, two face-sheets with air core and monolithic plate, in terms of their permanent deflections and damage degrees. The finding of this research provides a valuable insight into the engineering design of sandwich constructions against air blast loads.

• Elastomers and Composites
• /
• v.34 no.1
• /
• pp.31-44
• /
• 1999

Interfacial adhesive strength between the fully-crosslinked and partially-crosslinked rubber layers were Investigated at the temperature range of $30{\sim}120^{\circ}C$ for four different rubbers(NR, SBR, EPDM, BIMS). The surfaces of interfacial failure were also investigated using a scanning electron microscopy(SEM). The physical interlinking played a major role in the adhesive strength between the fully-crosslinked rubber layers. When a partially-crosslinked rubber layer was bonded to the fully-crosslinked one, the chemical as well as the physical interlinking affected the adhesive strength. NR showed a "interfacial knotty tearing" pattern, while EPDM showed a typical "cross-hatched" one when the adhesive strength approached to the cohesive tear strength of each material.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.3 no.2
• /
• pp.235-246
• /
• 1996

The purpose of this study was to discover the experience of hemodialysis which clients confronted hemodialysis at the same time as CRF diagnosis and to understand the nature and meaning of their crisis experience. The research subjects were 6 clients receiving hemodialysis in Seoul from Jan. 1996 to Jul. 1996. Data were collected by informal indepth interview and participant observation. Content Analysis(by Seaman & Verhonick, 1982; Woods & Catanzaro, 1988) was applied to collect similar contents and common experience in order to derivate concepts and categories for better understanding of their hemodialysis experience. As a result, 6 categories derivated to indentify their hemodialysis experience of the CRF clients-confronted hemodialysis at the same time as CRF diagnosis-were as follows: 1) The category of shocking crisis composed the concepts of shock, amagement and suffocation. 2) The category of denial composed the concepts of disease refusal and hemodialysis refusal. They repeatedly visited hospitals or didn't visit hospital in order to refuse disease, then depended on folk remedy or shamanistic method. 3) The category of severe anxiety composed the concepts of abandoned feeling, shame, resentment, neurosis and anger. 4) The category of depression composed the concepts of grief, suffering of unfairness, tearing, desire to death. 5) The category of powerlessness composed the concept of hopelessness. 6) The category of resigned acceptance composed the concepts of resignation and acceptance. In this study, the CRF clients who confronted hemodialysis at the same time as CRF diagnosis experienced six stages in accepting hemodialysis but these stages were mingled simultaneously and went on.

• Journal of Ocean Engineering and Technology
• /
• v.8 no.2
• /
• pp.173-184
• /
• 1994

원자력 압력용기강의 탄소성 파괴인성값 $J_IC$를 CT형 시험편을 이용하여 검토하였으며, 평활 시험편 및 측면홈 시험편의 두께는 각각 $B_O$=25.4mm, $B_N$=20.4mm 이다. 측면홈의 깊이는 19.7% 이며, 홈의 각도는 90 .deg.로 가공하였다. 탄소성 파괴인성시험은 ASTM E813-81과 JSME S001-81의 추천방법에 따라 실시하였다. 두 추천방법으로 실험한 결과 ASTM 방법에 의한 $J_IC$값이 과대평가됨으로써 부대조건에 만족되지 못하였지만 JSME방법은 만족되었다. 측면홈 시험편은 R고선법에 의한 ductile tearing의 결정이 평활 시험편보다 용이하였으며, 이에 따른 $J_IC$값의 정확성을 배가 할 수 있었다. 또한 임계 스트레치존 폭($SZW_C$)은 측면홈에 의한 높은 3축응력이 발생되어 평활시험편보다 적게 나타났으며, 이러한 복합적인 원인에 기인하여 스트레치존법에 의한 $J_IC$평가는 R곡선법에 의한 평가보다 약간 과대평가됨을 알 수 있었다.

• The Journal of the Korean dental association
• /
• v.15 no.2
• /
• pp.115-120
• /
• 1977

Extensive avulsion of the scalp, or stripping of a large area of soft tissue from the skull, is a serious accidnet. The avulsed scalp is often injured otherwise, such as by crushing, tearing, or from multiple laceration. The surrounding skin may be devitalized. Replacement of the scalp is usually followed by necrosis and sloughing within a short time. In such instances, the outer table of the cranium may become sucessively exposed. dry, dead, and affected by osteomyelitis. Hence the securing of early healing to prevent these is of the utmost importance. The successful case of reimplantation of the completely avulsed scalp, which is exposured to air for about 14 hours, is reported, in which there was partial growth of hair afterwards. The avulsed scalp caused by her long hair being caught in a grain belt was contaminated with hairs & dust. Authors treated this 19-year old female patient by split thickness skin graft, intermediate skin graft, full thickness skin graft from her own avulsed scalp.

• Journal of Trauma and Injury
• /
• v.27 no.3
• /
• pp.79-83
• /
• 2014

The brachial plexus is a network of nerves that provides movement and feeling to the shoulder, arm and hand. The majority of acute brachial plexus injuries occur when the plexus is stretched violently or torn. This happens as result of the shoulder being pressed down forcefully while the head is pushed up and away from that shoulder. Such injuries frequently result from automobile or motor-cycle accidents or from falls and usually affect one side. Nerve injuries vary in severity from a mild stretching of the nerve to a tearing of the nerve root away from the spinal cord. We experienced a 50-year-old woman with weakness in both upper extremities after an attempted hanging. A consecutive workup revealed bilateral brachial plexus injuries. Six months after the incident, she had fully recovered. This is a very rare case of bilateral brachial plexus injuries after an attempted hanging.

• Proceedings of the Korean Society for Technology of Plasticity Conference
• /
• 2005.05a
• /
• pp.407-410
• /
• 2005

The drawability of AZ31B magnesium sheet is estimated according to the variable temperatures (200, 250, 300, 350 and $400^{\circ}C$), forming speed (20, 50, 100 mm/min), thickness (0.8, 1.4 t), blank holding force (1.0, 1.4, 1.7kN). The deep drawing process (DDP) of circular cup is used in forming experiments. The results of deep drawing experiences show that the drawability is well at the range from 250 to $300^{\circ}C$, 50mm/min forming speed and 1.4kN blank holding force. The 0.8t magnesium sheets were deformed better than 1.4t. BHF was controlled in order to improve drawability and protect the change of cup thickness. When BHF was controlled, tearing and thickness change were decreased and LDR. was improved from 2.1 to 3.0.