The number of earthquakes is increased recently. A electrical equipment is very important in all electric system because it can make a serious problems in such as nuclear power plants like a black out. So, seismic safety design of electrical equipment is necessary to keep to use the convenience of electronics. In this study, threshold values of electronic equipment was founded out from the numerical results by using seismic load.

Background: Assessments of Sit-to-Stand (STS) and gait functions are essential procedures in evaluating level of independence for the patients after stroke. In a previous study, we developed the software to analyze center of pressure (COP) in standing position on Wii Balance Board (WBB). Objects: This purpose of this study is to measure test-retest reliability of ground reaction forces, COP and time using WBB on STS and gait in healthy adults. Methods: Fifteen healthy participants performed three trials of STS and gait on WBB. The time (s), vertical peak (%) and COP path-length (㎝) were measured on both tasks. Additionally, counter (%), different peak (%), symmetry ratio, COP x-range and COP y-range were analyzed on STS, 1st peak (%), 2nd peak (%) of weight were analyzed on gait. Intra-class correlation coefficient (ICC), standard error measurement (SEM) and smallest real difference (SRD) were analyzed for test-retest reliability. Results: ICC of all variables except COP path-length appeared to .676∼.946 on STS, and to .723∼.901 on gait. SEM and SRD of all variables excepting COP path-length appeared .227∼8.886, .033∼24.575 on STS. SEM and SRD excepting COP path-length appeared about .019∼3.933, .054∼11.879 on gait. Conclusion: WBB is not only cheaper than force plate, but also easier to use clinically. WBB is considered as an adequate equipment for measuring changes of weight bearing during balance, STS and gait test which are normally used for functional assessment in patients with neurological problems and elderly. The further study is needed concurrent validity on neurological patients, elderly patients using force plate and WBB.

The private fixed device is needed for a radiation therapy about breast cancer. But this option is wrong applies to every hospital. Thereupon, we will establish standard of option for body-specific. 42 patients on 4 months were enrolled. The option of fixed device applied to divide into 6 kinds. The images were analyzed by OBI. In result, It is excellent reproducibility of position by all body-specific that It is applied head holder, shoulder holder, cotton, kneefix.

This study on Structural analysis of kickboard used two types suspension systems. Kickboard is very dangerous in rider because of unstable in diving conditions. Thus suspension system of kickboard are very important component parts. This study focus on two suspensions for stability in kickboard which coil spring and aluminium leaf spring.

Numerical analysis was carried out to investigate the variation of stress and strain characteristics for the rail device in stone board cutting system. The maximum equivalent stress and strain from the vertical load acting on the device decrease as the load moves forward. Also, the maximum equivalent stress appears near the end of left, and the equivalent force of right rail device was about 1.8 times higher than that of left rail device. The variation of stress and strain distributions was remarkable at the edge of the device, and it has a strong influence on the bottom and column. These results can be applicable to optimal design of the stone board cutting device for the system safety.

In this study, temperature variation characteristics in the stone board cutting device with sheath heater were analyzed through numerical investigation. Four 2kW sheath heaters whose length and diameter are 1800mm, 11mm are installed, and the initial temperature is -5℃. Also Transient condition is used for temperature variations with the operating time of sheath heater. From the analysis, transient temperature variations of cutting device after operating the sheath heater were predicted. Temperature variations were predicted that mainly appears in part contacted with the sheath heater. The result will be helpful in optimal design for various system equipped with sheath heater.

외국인 선원은 1990년대 선원 수급이 어려웠던 어선에 산업연수생으로 승선하기 시작하여 2013년말 현재 상선 및 어선에 총 21,327명이 승선하고 있다. 특히 원양어선 및 연근해어선의 경우에는 최근 5년간 어선 척수가 감소하고 있음에도 불구하고 외국인 선원의 수는 거의 2배 증가하였다. 최근 어선 해양사고를 살펴보면, 어선에 다국적의 선원이 승선한 후 선원 상호간의 의사소통이 어려워진 것이 주요 문제가 되었다. 그리고 외국인 선원이 이해할 수 있는 안전수칙 등이 제공되지 아니하고 교육․훈련이 제대로 이루어지지 않고 있다. 그 결과 어선은 조업 중 해양사고의 발생 위험이 높아졌고, 비상상황에서 선장의 통제 하에 적절한 비상대응이 이루어지지 않았다. 또한 한국인 선원의 외국인 선원에 대한 폭언 및 구타로 인한 몇 건의 노동문제가 발생했다. 따라서 본 논문은 먼저 외국인 선원이 승선한 어선에서 발생한 해양사고 사례와 어선원의 고용 및 교육문제에 대해 살펴보고, 해양사고 예방을 위하여 외국인 선원에 대한 안전수칙교육과 정기적인 비상대비 교육․훈련의 필요성을 제시하고자 한다.

The angle of attack of a cambered otter board in a bottom trawl was estimated using a three-dimensional semi-analytic treatment of a towing cable (warp) system that was applied to the field experiments of a bottom trawl obtained by the Scanmar system. The equilibrium condition of the horizontal component and vertical component of forces was used to the three forces acting on the otter board in the horizontal plane. Those forces were the force on the warp at the bracket, hydrodynamic lift and drag forces on the otter board and the force on the hand rope attached just behind the otter board. Also the equilibrium of moment about the front edge of the otter board was used to find out the angle of attack of the cambered otter board. When the warp length was 120m and 180m long and the towing speed was between 1.23 and 1.90 m/s, the estimated angle of attack of the cambered otter board was ranged between 26.1° and 29.6°, respectively, though the maximum lift force was at the angle of attack 22.6°. The angle of attack of the otter board was tended to increase weakly with the longer length of warp (180 m) at the same towing speed in the experiment.

We investigated the effects of DMAB (Borane dimethylamine complex, C2H10BN) in electroless Ni-B film with addition of DMAB as reducing agent for electroless Ni plating. The electroless Ni-B films were formed by electroless plating of near neutral pH (pH 6.5 and pH 7) at 50˚C. The electroless plated Ni-B films were coated on screen printed Ag pattern/PET (polyethylene terephthalate). According to the increase of DMAB (from 0 to 1 mole), the deposition rate and the grain size of electroless Ni-B film increased and the boron (B) content also increased. In crystallinity of electroless Ni-B films, an amorphization reaction was enhanced in the formation of Ni-B film with an increasing content of DMAB; the Ni-B film with< 1 B at.% had a weak fcc structure with a nano crystalline size, and the Ni-B films with > 5 B at.% had an amorphous structure. In addition, the Ni-B film was selectively grown on the printed Ag paste layer without damage to the PET surface. From this result, we concluded that formation of electroless Ni-B film is possible by a neutral process (~green process) at a low temperature of 50˚C.

The number of CT gradually tends to increase, but radiation exposure includes higher exposure dose of patients than other test methods as the rate of 67% in the whole radiology tests. Exposure dose of patients has increased due to it and the second exposure has been done by scattered rays of other organs except for test sites. Especially, special shielding has not been done in gonad which is very sensitive to radiation in brain and chest CT. So this study tries to research the second exposure dose of the gonad and how to shield it in Chest CT which does not include it. It was intended for 20 male adults who are 30 years old and conduct chest CT. SIEMENS’s SOMATOM DEFINITION AS* was used as CT equipment. For the scanning conditions, The tube voltage is 120kv, the tube current is 90mAs, and the slice thickness is 3mm as the general chest CT conditions. CHIYODA TECHNOL CORPORATION’s FGD1000 was used as Glass dosimeter (PLD). A lead pad of 0.25mmPb was produced as the shielding board. For the research method, the shielding rate was compared by measuring exposure dose of the gonad before and after shielding and the usefulness of the shielding board was evaluated. The average exposure dose of symphysis pubica before shielding was 280.5μGy and the average exposure dose of coccyx was measured as 151.5μGy. The average exposure dose of symphysis pubica after shielding the gonad with a lead pad of 0.25mmPb was 42μGy and the average exposure dose of coccyx was measured as 41μGy.

Straw board is renewable natural building material with the advantages of green environmental protection, strong applicability. But it hadn't been promoted because of many reasons such as technology and economy. Through the analysis ofthe unique advantages and the recent new cases of straw board buildings in Harbin, and the current obstacles to application. The effective ways and the feasible solutions to promote sustainable straw board buildings are summarized.

Recently, sewer–pipe constructions replacing deteriorated pipes are currently underway in the downtown area. To resolve many problems in the conventional method of open-cut construction, lining-board system using light-weight GFRP panels is developed. The pultruded GFRP panels can be successfully used for the developed lining-board system as temporary decks and retaining walls in virtue of light weight, high strength and high durability. In this paper, the structural safety and serviceability of the lining-board system are examined through FE analyses and experiments. Further more, a field application of the lining-board system is presented. The field application shows that quality and environment of construction can be significantly improved.

본 연구는 김천 김공폭 암각바둑판을 사례로, 암각바둑판의 의미와 입지 및 장소정체성을 고찰한 것으로 다음과 같은 결과를 도출하였다. 암각바둑판이 새겨진 장전폭포일대는 예로부터 수도암에서 가야산 해인사에 이르는 길목의 승경으로 회자되어 왔다. 수도산에서 발원한 수원(水源)이 장전폭포를 거치는 대가천과 남쪽의 황점 및 장전리에서 비롯된 목통천이 무흘구곡 제6곡인 옥류동 옥류천에 합류된다. 추가 발견된 암각바둑판은 계류형 암각바둑판의 전형적 입지로서, 화강암 협곡과 너럭바위 등의 지형경관이 탁월한 것으로 미루어 보아 옛 선비들의 풍류와 밀접한 관련이 있음이 재차 확인되었다. 만폭 암각바둑판의 크기는 46.0×46.5㎝, 기반암의 크기는 3.0×1.6m 이었으며 높이는 0.7m였다. 바둑판 상부에 "晩"이라 기재되어 있고 대국방향을 장축으로 한 좌향은 NW-SE로 나타났다. 추가 발굴된 김천의 암각바둑판의 명칭은 폭포 상단에 크고 깊게 음각된 '만폭(晩瀑)'이라는 폭포명과 암각바둑판 상단에 이에 조응(照應)하여 새겨진 '晩' 등을 반영하여 '김천 만폭 암각바둑판'으로 명명함이 타당하다고 본다. 만폭 암각바둑판 주변의 바위글씨로 볼 때 폭포의 이름은 만폭을 비롯하여 '수렴폭(水濂瀑)', '귀이폭(歸異瀑)' 등의 이명을 갖고 있었던 것으로 확인된다. 또한 폭포수의 상류에서 물을 공급하는 수원은 '원천(源泉)', 떨어지는 폭포수를 담는 못은 '지일담(知一潭)'이며 폭포 하단을 에워싸고 있는 벼랑은 '운금벽(雲錦壁)' 등의 경물명을 부여함으로써 일정한 의미를 설정한 것으로 추정된다. 만폭 암각바둑판의 조영자는 주변에 각자된 4인명의 바위글씨로 보아 수원 백씨 등이 조성 및 향유주체가 되어 구한말 이후 20C 초반에 조성한 것으로 추정되지만 바위글씨와 주민 증언을 통해 볼 때 수원 백씨 이전 이곳은 원림경영 등에 대한 별도 주체가 있었을 것으로 추정됨에 따라 계속적인 보완 연구가 필요하다