자살기도자의 절망감과 자살치명도간의 관계

박정래,이상익,김재진,김석중,정인원,Park, Jeong-Rae,Lee, Sang-Ick,Kim, Jae-Jin,Kim, Seok-Jung,Chung, In-Won 한국정신신체의학회 1996 정신신체의학 Vol.4 No.1

The objective of this study is to evaluate the relationship of hopelessness and suicidal lethality of suicide attempters. The subjects were 72 persons who attempted suicide and came to the emergency room of Chungbuk National University Hospital from April 1st, 1995 to March 31st, 1996. The hopelessness of suicide attempter was assessed by Beck Hopelessness Scale(BHS), and the suicidal lethality was assessed by Risk-Rescue score. The Risk-Rescue Scores exhibited no significant differences in demographic characteristics (sex, age, education, religion, marital status, socioeconomic class, occupation) and psychiatric diagnoses. But the Risk-Rescue scores were significantly higher in high BHS group(BHS score ${\geq}$ 9) than in low BHS group(BHS score <9) and positive correlation was observed between the BHS and the Risk-Rescue score(Rs=0.77 : p<0.05). These results suggest that level of hopelessness be a major risk factor for suicidal lethality.

인터포저의 디자인 변화에 따른 삽입손실 해석

박정래(Jung-Rae Park),정청하(Cheong-Ha Jung),김구성(Gu-Sung Kim) 한국마이크로전자및패키징학회 2021 마이크로전자 및 패키징학회지 Vol.28 No.4

본 연구에서는 실험 설계법을 통해 인터포저에서 Through Silicon Via (TSV) 및 Redistributed Layer (RDL)의 구조적 변형에 따른 삽입 손실 특성 변화를 확인하였다. 이때 3-요인으로 TSV depth, TSV diameter, RDL width를 선정하여, 구조적 변형을 일으켰을 때 400 MHz~20 GHz에서의 삽입 손실을 EM (Electromagnetic) tool Ansys HFSS(High Frequency Simulation Software)를 통해 확인하였다. 반응 표면법을 고려하였다. 그 결과 주파수가 높아질수록 RDL width의 영향이 감소하고 TSV depth와 TSV diameter의 영향이 증가하는 것을 확인했다. 또한 분석 범위 내에서 RDL width를 증가시키면서 TSV depth를 감소시키고 TSV diameter를 약 10.7 ㎛ 고정하는 것이 삽입 손실을 가장 최적화 시키는 결과가 관찰되었다. In this study, Insertion loss according to the structural variant of interposer to Through Silicon Via (TSV) and Redistributed Layer (RDL) was studied through design of experiment. 3-Factors was considered as a variant, TSV depth, TSV diameter, RDL width with factor arrangement method and the response surface method from 400 MHz to 20 GHz. As a result, it was confirmed that as the frequency increased, the effect of RDL width was decreased and the effect of TSV depth and TSV diameter was increased. Also within the analysis range, to increasing RDL width, decreasing TSV depth, and fixing TSV diameter about 10.7 ㎛ was observed optimal result of Insertion loss

Preparation of YBa₂CU₃O7-y Superconducting Thin Films by on - axis Sputtering

한재원(Jae Won Han),박정래(Jung Rae Park),최무용(Mu-yong Choi) 한국진공학회(ASCT) 1995 Applied Science and Convergence Technology Vol.4 No.2

각기 다른 스퍼터링 기체 압력과 타켓-기판 사이 거리하에서 on-axis 스퍼터링 방법으로 MgO(100) 기판 위에 YBa₂CU₃O_(7-y) 초전도 박막을 제조하였다. 적정하게 높은 스퍼터링 기체 압력을 사용할 경우 on-axis 방법으로도 off-axis 방법으로 제조한 박막에 비해 전기적, 구조적으로 우수한 양질의 박막을 c축으로 성장시킬 수 있었다. 스퍼터링 기체 압력 증가에 의한 resputtering 감소 효과가 타켓과 기판 사이의 거리 증가에 의한 resputtering 감소 효과보다 성장되는 박막의 초전도성 향상에 더욱 효과적이였다. 박막의 성장 속도가 빠를 경우 MgO 위에 YBCO 박막이 c축보다는 α축으로 성장하려는 경향을 보였다. 스퍼터링 기체 압력과 타켓-기판 사이의 거리가 성장되는 박막에 미치는 영향에 대해 임계온도, 100 K와 300 K에서의 저항비, X선 회절분석 등을 통하여 고찰해 본다. YBa₂Cu₃O_(7-y) thin films have been prepared on MgO(100) substrates placed on-axis to the target by de magnetron sputtering in a variety of oxygen/argon gas pressures with different substrate-target distances. We found that films with the c-axis perpendicular to the substrate deposited in an optimally high gas pressure with on-axis substrate-target configuration exhibit such good electrical and structural properties as those deposited with off-axis configuration do. Increasing the substrate-target distance was found to be effective in reducing the resputtering effect and enhancing superconductivity of films, but not so much as increasing the gas pressure was. We also found that high deposition rates may promote mixed α- and c-axis growth of YBCO films on MgO substrates. Dependences of the T_c, the ratio of resistances at 300 K and 100 K, and the X-ray diffraction pattern on the gas pressure and the substrate-target distance are described.

AI를 이용한 스마트 양식 시스템

유한용 ( Han-yong Yoo ),박정래 ( Jung-rae Park ),오태훈 ( Tae-hun Oh ),송보경 ( Bo-kyung Song ),정성훈 ( Seong-hun Jung ),박병배 ( Byeong-bae Park ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2

본 시스템은 사용자에게 수질, 수온, 산소량 측정 및 AI 자동 먹이 공급 그리고 불법 어선감지 시스템을 제공한다. 이는 사용자의 사유재산 보호, 효율적인 운영을 통한 경제성 향상 등 양식장 환경 개선을 목적으로 한다.

유한요소해석을 이용한 마이크로 분사 노즐 특성 평가

임동욱,최두선,김태민,박정래,박규백,함휘찬,김지훈,Lim, Dong-Wook,Choi, Doo-Sun,Kim, Tae-min,Park, Jung-Rae,Park, Kyu-Bag,Ham, Hwi-Chan,Kim, Ji-Hun 한국금형공학회 2020 한국금형공학회지 Vol.14 No.3

In the drug delivery system industry, the technology with even split injection becomes important for maximizing efficiency and minimizing the side effects. In conventional drug delivery system, infection can occur due to pain and splashing. Also, various applications are impossible due to disposable use, and it is the reason to avoid to use this system because of the complexity of the driving method. Therefore, in this study, a painless drug delivery device is developed for non-pain with electrical insulation breakdown method. Finite elements analysis was used to evaluate the ejection characteristics of drugs according to the shape of the micro ejection nozzle. The effect of the number of holes in the micro nozzle, the length of the nozzle and the inner shape of the nozzle on the drug discharge characteristics were analyzed.

주유기 유량 변조방지를 위한 주유기 엔코더 신호 펄스 파형 모니터링 및 정량확인 시스템 개발

박규백,이정우,임동욱,김지훈,박정래,하석재,Park, Kyu-Bag,Lee, Jeong-Woo,Lim, Dong-Wook,Kim, Ji-hun,Park, Jung-Rae,Ha, Seok-Jae 한국금형공학회 2022 한국금형공학회지 Vol.16 No.1

As meters become digital and smart, energy data such as electricity, gas, heat, and water can be accurately and efficiently measured with a smart meter, providing consumers with data on energy used, so that real-time demand response and energy management services can be utilized. Although it is developing from a simple metering system to a smart metering industry to create a high value-added industry fused with ICT, illegal counterfeiting of electronic meters is causing problems in intelligent crimes such as manipulation and hacking of SW. The meter not only allows forgery of the meter data through arbitrary manipulation of the SW, but also leaves a fatal error in the metering performance, so that the OIML requires the validation of the SW from the authorized institution. In order to solve this problem, a quantitative confirmation device was developed in order to eradicate the act of cheating the fuel oil quantity through encoder pulse operation and program modulation, etc. In order to prevent the act of deceiving the lubricator, a device capable of checking pulse forgery was developed, manufactured, and verified. In addition, the performance of the device was verified by conducting an experiment on the meter being used in the actual field. It is judged that the developed quantitative confirmation device can be applied to other flow meters other than lubricators, and in this case, accurate measurement can be induced.

광 삼각법 측정 알고리즘을 이용한 자동차 도어 간격 측정 및 보정에 관한 연구

강동성,이정우,고강호,김태민,박규백,박정래,김지훈,최두선,임동욱,Kang, Dong-Sung,Lee, Jeong-woo,Ko, Kang-Ho,Kim, Tae-Min,Park, Kyu-Bag,Park, Jung Rae,Kim, Ji-Hun,Choi, Doo-Sun,Lim, Dong-Wook 한국금형공학회 2020 한국금형공학회지 Vol.14 No.1

In general, auto parts production assembly line is assembled and produced by automatic mounting by an automated robot. In such a production site, quality problems such as misalignment of parts (doors, trunks, roofs, etc.) to be assembled with the vehicle body or collision between assembly robots and components are often caused. In order to solve such a problem, the quality of parts is manually inspected by using mechanical jig devices outside the automated production line. Automotive inspection technology is the most commonly used field of vision, which includes surface inspection such as mounting hole spacing and defect detection, body panel dents and bends. It is used for guiding, providing location information to the robot controller to adjust the robot's path to improve process productivity and manufacturing flexibility. The most difficult weighing and measuring technology is to calibrate the surface analysis and position and characteristics between parts by storing images of the part to be measured that enters the camera's field of view mounted on the side or top of the part. The problem of the machine vision device applied to the automobile production line is that the lighting conditions inside the factory are severely changed due to various weather changes such as morning-evening, rainy days and sunny days through the exterior window of the assembly production plant. In addition, since the material of the vehicle body parts is a steel sheet, the reflection of light is very severe, which causes a problem in that the quality of the captured image is greatly changed even with a small light change. In this study, the distance between the car body and the door part and the door are acquired by the measuring device combining the laser slit light source and the LED pattern light source. The result is transferred to the joint robot for assembling parts at the optimum position between parts, and the assembly is done at the optimal position by changing the angle and step.

소성 가공 해석을 통한 티타늄 합금 볼트 열간 단조 공정 분석

최두선,김태민,항봉석,한유진,고강호,박정래,박규백,이정우,김도언,Choi, Doo-Sun,Kim, Tae-Min,Han, Bong-Seok,Han, Yu-Jin,Ko, Kang-Ho,Park, Jung-Rae,Park, Kyu-Bag,Lee, Jung-Woo,Kim, Do-Un 한국금형공학회 2020 한국금형공학회지 Vol.14 No.1

Titanium alloy has been in the spotlight as a core material in high-tech industries that require high strength and light weight because it has excellent strength and corrosion resistance and strength is higher than that of steel. Therefore, in various industries, existing steel products are intended to be replaced with titanium alloys. Titanium alloys can cause cutting tool breakage during cutting, and heat generated during cutting does not dissipate, accumulates in tools and workpieces, resulting in large wear and tear on thin workpieces. In addition, since titanium alloy is a metal with high chemical activity, the wear of the tool becomes more severe when the cutting speed is high, so machining of titanium bolt through cutting is very disadvantageous in terms of productivity. Therefore, the production of bolts using titanium alloys is being produced through a forging process to improve productivity and product quality. In this paper, hot forging molding analysis was performed on bolts used for fastening automobile parts using Ti-6Al-4V alloy, which is the most commonly used titanium alloy.

배드민턴경기의 기능향상을 위한 단식경기내용 분석에 관한 연구

박정래,장형오 公州大學校스포츠科學硏究所 2000 스포츠科學硏究所論文集 Vol.- No.14

The purpose of this study is to examine the gap of achievement frequency of basic skills and affection to the match ability according to success and failure of basic skills, and to find the gap of the achievement frequency in basic skills in each aged group in a single match of badminton games. The examiner surveyed the achievement frequency of basic skills shown in semifinal games and final games of each aged group - male high school, male college, and male adult during 81st National Athletic Meet. The gap of achievement frequency in each game is performed by t-verification and One-way ANOVA utilized a subordinate position program of SPSS/PC+ 8.0, and when the gap happens, after the fact analysis is operated by Tukey's HSD. The conclusions of this study are the following. First, elite badminton players in a single match have a point of difference in achievement frequency of basic skills. Second, in elite badminton players, achievement failure of basic ability affects in match ability, but success of that doesn't affect in match ability. Third, elite badminton players in each aged group have a difference in achievement frequency of basic ability.

톨루엔 디이소시아네이트 폭로 근로자들의 작업방법에 따른 대사물질의 비교 및 면역능에 관한 연구

이수일,조병만,황인경,이철호,박정래 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.3

Following recent advanced industrialization, the amount of polyurethane to use as thermal insulating materials, upholstery, mattresses and packing materials in automotive and furniture industry is increasing world-widely, and the number of polyurethane-producing worker will be increased. Because the numerous organic solvents are used in polyurethane-producing factory, the workers in this work site is exposed to many organic solvents. Of the organic solvents, Toluene Diisocyanate(TDI) has many hazardous effects to human. The effects of TDI on human are the irritation to respiratory mucosa and gastrointestinal symptoms. Conjunctival irritation, dermal inflammation (redness, pain, vesicular formation) and gastrointestinal symptom(nausea, vomiting. abdominal pain) are reported just after short-term exposure of TDI. TDI is known to give rise to bronchial asthma, as the immune disorder. And because of strongly volatile characteristics of TDI, it is suggested as a more injurious material to human health, especially human immune system, than other organic solvents. Bronchial asthma inducing mechanism of TDI is not clearly known, but on the analogy of TDI induced symptoms and recent studies, early-onset asthma is type I hypersensitivity reaction mediated by immunoglobulin E(IgE), and late-onset asthma is maybe type III hypersensitivity reaction by circulating IgG. And we know that the complicated human immune function is likely to move in such that mechanisms, there are not studies on immune indices evaluating the bronchial asthma-related immune function. The evaluation of change patterns of humoral immunity including IgE and IgG and cellular immunity including T-helper cell. T-suppressor cell and T-cytotoxic cell will be helpful to evaluate exposure degrees and prognosis in TDI exposed workers. Because TDA(toluene diamine) as a biological exposure index of TDI becomes the focus of interest, we know that a study on the correlation between urinary TDA and air TDI and immunological indices will make a contribution to biological effect monitoring indicies. We examined human immunity indicators such as WBC, %Lymph (percentile of Lymphocyte in WBC), %T-cell(percentile of T-lymphocyte in total lymphocyte). CD4, CD8, C3, C4, IgA, IgG, IgM, IgE in peripheral blood to evaluate the health hazard of the TDI-exposed workers. And we examined TDA to evaluate correlation between exposure and effect. Total 90 subjects was selected, 45 workers who worked in the polyurethane-producing factories as an exposed group, and 45 cases who were office workers(10 cases), other blue collors(27 cases), and medical college students(8 cases) as a control group. And the results were as follows; 1. The logarithm of IgE-Log10(IgE)±SD-in peripheral blood of a exposed group was significantly higher than a control group, 2.22 ±0.62 in case group compared with 1.98±0.53 in control group. (p<0.05) 2. IgA and IgM in the polyurethane-producing workers were 261.02±83.12㎎/㎗, 151.97 ±59.64 ㎎/㎗, respectively, and 292.77±100.45, 179.17±100.78 in control group. IgA and IgM was slightly lower in polyurethane-producing group than control.(p>0.05) 3. WBC, %Lymph. %T-cell, C3, C4, CD4, CD8, CD4/CD8 ratio and IgG in case group were 6.391.1 ea/㎖, 37.53 %, 59.54 %, 76.68 ㎎/㎗, 0.76×10(9) ea/L, 0.63×10(9) ea/L, 1.39, and 1606.29 ㎎/㎗, respectively, and 6,974.7 ea/㎖, 35.12 %, 59.64 %, 71.95 ㎎/㎗, 33.94 ㎎/㎗, 0.80×10(9) ea/L, 0.61×10(9) ea/L, 1.39, and 1581.51 ㎎/㎗ in control group. There was no statistical significance between two groups.(p>0.05) 4. In the comparison of each other companies, average of individual urinary TDA in polyurethane paint manufacturing companies is higher than that of polyurethane sponge foaming companies. And, the concentration of 2.6-TDA which is a metabolite of well-vaporized 2.6-TDI is higher than that of 2.4-TDA in the polyurethane sponge foaming companies. But, the concentration of 2.4-TDA which is a metabolite of illvaporized but well skin-absorbed 2.4-TDI is higher in polyurethane paint manufactures. 5. There were no statistical significance in the correlations between individual urinary TDA and immunologic indices.