• Journal of Korea Society of Industrial Information Systems
• /
• v.19 no.2
• /
• pp.15-22
• /
• 2014

This paper proposes a CUDA simulation framework for non-x86 computing platforms based on QEMU and GPGPU-sim. Previous simulators for heterogeneous computing platforms did not support for non-x86 CPU models or CUDA computing platform. In this work, we combined the QEMU and the GPGPU-Sim to support the non-x86 CPU models and the CUDA platform, respectively. This approach provides a simulation framework for CUDA computing on non-x86 CPU models.

• 한국가시화정보학회:학술대회논문집
• /
• 2003.11a
• /
• pp.83-86
• /
• 2003

Synchrotron X-ray micro imaging technique was employed to non-invasively monitor the water flow inside xylem vessels in a bamboo leaf. The phase contrast X-ray images clearly visualized plant anatomy and the rise of a water front inside the vessels. Consecutive X-ray images taken for 60 seconds revealed water rise kinetics against gravity in the xylem of a cut dry leaf taken from a bamboo tree. For the first time, traces of water rise, variation of contact angle between water and xylem wall as well as the internal structure of xylem were obtained. In xylem vessels, a repeating flow pattern has a typical flow velocity of $30.7{\mu}m/s$ and faster flow is established intermittently. It is concluded that the transmission type of X-ray micro imaging can be used as a powerful tool to investigate the ascent of sap in the xylem vessels at a resolution higher than that of MRI.

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1994.11a
• /
• pp.86-86
• /
• 1994

박막 EL소자의 투명전극으로 제작된 ITO막의 전기적, 광학적 특성을 조사하였다. Plama CVD방법으로 제작된 ITO막은 증착시 산소결핍으로 인한 비 다량결합(non-stochiometry) 에 의해 In이 석출되어 흑화현상이 일어나 전기전도도와 광투과율을 향상을 위해 산소분위기에서 30$0^{\circ}C$로 4분간 열처리를 행하였다. 한편 ITO막의 비저항 $\rho$와 광투과율 T를 Van der pauw법과 단색 분광계로 각각 측정하였다. 그 결과 상온에서 10-15$\Omega$/$\square$의 면저항과 400-1000nm의 파장영역에서 85-95%의 광투과율을 가져 박막 EL소자의 투명전극 조건을 만족하였다. 열처리에 대학 ITO막의 구조적 특성을 알아보기 위해 X-선회절장치(JEOL.JDX-8030)로 조사하였다. Fig.1은 X-선 회절 패턴을 나타낸다. 열처리후 ITO막은 상대적으로 최대 강도(peak intensity) 가 증가함으로써 열처리에 의해 결정성 향상이되었음을 알수 있다. Fig.2는 파장에 따른 ITO막의 광투과도를 나타낸다.

• Electronics and Telecommunications Trends
• /
• v.35 no.2
• /
• pp.89-103
• /
• 2020

Knowledge of the technology, characteristics, and market trends of the latest CPUs used in smartphones, computers, and supercomputers and the research trends of leading US university experts gives an edge to policy-makers, business executives, large investors, etc. To this end, we describe three topics in detail at a level that can help educate the non-majors to the extent possible. Topic 1 comprises the design and manufacture of a CPU and the technology and trends of the smartphone SoC. Topic 2 comprises the technology and trends of the x86 CPU and supercomputer, and Topic 3 involves an optical network chip that has the potential to emerge as a major semiconductor chip. We also describe three techniques and experiments that can be used to implement the optical network chip.

• Electronics and Telecommunications Trends
• /
• v.35 no.2
• /
• pp.120-136
• /
• 2020

Knowledge of the technology, characteristics, and market trends of the latest CPUs used in smartphones, computers, and supercomputers and the research trends of leading US university experts gives an edge to policy-makers, business executives, large investors, etc. To this end, we describe three topics in detail at a level that can help educate the non-majors to the extent possible. Topic 1 comprises the design and manufacture of a CPU and the technology and trends of the smartphone SoC. Topic 2 comprises the technology and trends of the x86 CPU and supercomputer, and Topic 3 involves an optical network chip that has the potential to emerge as a major semiconductor chip. We also describe three techniques and experiments that can be used to implement the optical network chip.

• Electronics and Telecommunications Trends
• /
• v.35 no.2
• /
• pp.104-119
• /
• 2020

Knowledge of the technology, characteristics, and market trends of the latest CPUs used in smartphones, computers, and supercomputers and the research trends of leading US university experts gives an edge to policy-makers, business executives, large investors, etc. To this end, we describe three topics in detail at a level that can help educate the non-majors to the extent possible. Topic 1 comprises the design and manufacture of a CPU and the technology and trends of the smartphone SoC. Topic 2 comprises the technology and trends of the x86 CPU and supercomputer, and Topic 3 involves an optical network chip that has the potential to emerge as a major semiconductor chip. We also describe three techniques and experiments that can be used to implement the optical network chip.

• Design & Manufacturing
• /
• v.16 no.2
• /
• pp.33-38
• /
• 2022

Currently, Korea is an aging society, and it is expected to enter a super-aging society in about 4 years. Accordingly, many X-ray technologies are being developed. In X-rays, 99% of X-rays are converted into heat energy and 1% into light energy (X-rays). 99% of the thermal energy raises the temperature of the anode and its surroundings, and the cooling system is an important factor as overheating can affect the deterioration of X-ray quality and shortened lifespan. There is a method of forced air cooling using natural convection. Therefore, in this study, when X-rays were taken 5 times, Flow analysis was performed on heat removal according to temperature rise and cooling time for the heat generated at the anode of the X-ray tube (input power 60kW, 75kW, 90kW). Based on one-shot, the most rapid temperature rise section increased by more than 57% to 0.03 seconds, A constant temperature rises from 0.03 seconds to 0.1 seconds, It is judged that the temperature rises by about 8.2% or more at one time. After one-shot cooling, the cooling drops sharply from about 60% to 0.03 seconds, It is judged that the temperature has cooled by more than 86% compared to the temperature before shooting. One-shot is cooled by more than 86% with cooling time after 0.1 seconds, As the input power of the anode increases, the cooling temperature gradually increases. Since the tungsten of the anode target inside the X-ray tube may be damaged by thermal shock caused by a rapid temperature rise, an improvement method for removing thermal energy is required when using a high-input power supply.

• Journal of Preventive Medicine and Public Health
• /
• v.51 no.3
• /
• pp.121-129
• /
• 2018

Objectives: To assess the nurses' hand hygiene (HH) knowledge, perception, attitude, and self-reported performance in small- and medium-sized hospitals after Middle East Respiratory Syndrome outbreak. Methods: The structured questionnaire was adapted from the World Health Organization's survey. Data were collected between June 26 and July 14, 2017. Results: Nurses showed scores on knowledge ($17.6{\pm}2.5$), perception ($69.3{\pm}0.8$), self-reported HH performance of non-self ($86.0{\pm}11.0$), self-reported performance of self ($88.2{\pm}11.0$), and attitude ($50.5{\pm}5.5$). HH performance rate of non-self was $Y_1=36.678+0.555X_1$ (HH performance rate of self) (adjusted $R^2=0.280$, p<0.001). The regression model for performance was $Y_4=18.302+0.247X_{41}(peception)+0.232X_{42}(attitude)+0.875X_{42}(role model)$; coefficients were significant statistically except attitude, and this model significant statistically (adjusted $R^2=0.191$, p<0.001). Conclusions: Advanced HH education program would be developed and operated continuously. Perception, attitude, role model was found to be a significant predictors of HH performance of self. So these findings could be used in future HH promotion strategies for nurses.

• Journal of the Korean Chemical Society
• /
• v.29 no.3
• /
• pp.233-238
• /
• 1985

The non-porous and porous polystyrene divinylbenzene copolymers were prepared by the suspension polymerization method. The non-porous aminated polystyrene divinylbenzene, N-APSTDVB and the porous aminated polystyrene divinylbenzene, P-APSTDVB of 50∼100mesh size weakly basic anion exchanger were synthesized by chloromethylation followed by amination with methylamine. The functional groups of these synthesized anion exchangers were confirmed by their infrared spectra. The maximum capacity of these exchangers was 4.86meq/g. Pore volume and pore spectra were determined with a mercury porosimeter. The pore volume of P-PSTDVB increased with increasing X$_{diluent}$ at 30% of divinylbenzene. However, the pore volume of P-PSTDVB increased with increasing volume percent of divinylbenzene at constant mole fraction of diluent, X$_{diluent}$ of 0.5. The pore volume of synthesized copolymer and anion exchanger at 8% divinylbenzene and 0.5X$_{heptane}$ decreased as follows; P-PSTDVB 〉P-APSTDVB 〉N-PSTDVB. This result was attributed to the possibility that the pore volume were reduced by amination reactions. The distribution coefficients of boric acid on the N-APSTDVB anion exchanger in various concentrations of alcohol water solutions showed that as alcohol concentration increased, the distribution coefficients values decreased due to the reduced concentration of H$_2$BO$_3^-$.

• International Journal of Advanced Culture Technology
• /
• v.12 no.3
• /
• pp.165-169
• /
• 2024

The neck disc is a disease in which the nucleus of the cervical spine escapes between the cervical vertebrae and the intervertebral disc, pressing on the nerve, The neck disc has a high recurrence. If the neck disc is left untreated, the symptoms will worsen and cause inconvenience to life. Therefore, this study is to carry out a successful approach for non-pharmaceutical treatment of neck disc patients. The paper conducted a survey of 102 people who visited the orthopedics of a general hospital at K area from January 15 to March 28, 2024. Symptoms and changes in practice of neck disc were analyzed by t-test. The results of the research are as follows. Firstly, in the case of incorrect sitting posture, 74.5% of the case group was significantly higher than 33.3% of the control group((X²=3.79, p<.01). Secondly, neckache was significantly higher than the control group's average of 12.73 points, with an average of 39.86 points in the case group(t=3.14, p<.01). Thirdly, leg numbness tended to decrease from 7 days after non-drug application compared to before non-drug application. Therefore, the application of this non-drug management was found to be effective in relieving neck disk. The findings derived will contribute to providing valuable insights into the prevention and treatment of neck disc.