• 유체기계공업학회:학술대회논문집
• /
• 2000.12a
• /
• pp.345-350
• /
• 2000

The heat produced by the fission in the fuel of HANARO, 30 MW research reactor, is transferred from the primary cooling water to the secondary cooling water through heat exchangers, and the heat absorbed by the secondary cooling water is released into the atmosphere by the 33 MW cooling tower which is a mechanical induced draft and counter flow type. If the outlet temperature of cooling tower exceeds 33 of due to the loss of the cooling tower performance under reactor operation above $50\%$ of the full power, the reactor power should be reduced to half of the full power for safe operation. Therefore, the cooling capability of cooling tower should be maintained for the reactor to be normally operated. To predict the capability of cooling tower for full power reactor operation of 30 MW, the performance test of cooling tower was done at the reactor present power of 24 MW and the capability was respectively evaluated by characteristics and performance curves methods in accordance with the Code of Cooling Tower Institute of U.S.A. to confirm the reliability of evaluation. As a result, it was confirmed, through the results of each evaluation, that the cooling capability of cooling tower meets the design required heat load. Also, the equations of the performance and the characteristics curves of the cooling tower, based on the collected data during this performance test, was obtained for developing the calculation program to predict the cooling capability during reactor operation.

• Culinary science and hospitality research
• /
• v.2
• /
• pp.209-235
• /
• 1996

This study assesses consumer's eating-out pattern for Foodservice industry in Korea. Foodservice industry has become increasingly important because many businessman are looking it difficult to develop successful business as a consequence of the rapid growth in Foodservice industry in Korea This exploratory study originally nation-wide surveyed a 1450 consumer over the country. A research was conducted from July 1, to July 10, 1996 using as its subject domestic consumer over the country. The data obtained from the returned questionnaires was coded and transcribed for statistical analysis. The Statistical Package for social science program (SPSS) was used for computer analysis of the data. Findings indicated the problems of management structures, managerial techniques, and laggard counter measure against the korean government's open-door policy for dining-out industry. It is found that taste, F/B price, atmosphere are considered important in choice of restaurant. And korean consumer think it is that restaurant location, physical, evidence, quality of service, Ads of mouth and cleanliness. With the importance of dining-out industry to the business, economic, and social development of korea, it is imperative to bridge this gap for sustained growth and development. Moreover, this study for advancement and improvement through concrete and multi-directional data collection and in-depth analysis of consumer's eating-out pattern realities is required.

• Journal of the Institute of Electronics Engineers of Korea SC
• /
• v.40 no.6
• /
• pp.31-38
• /
• 2003

A 16-bit adiabatic low-power Microprocessor is designed. The processor consists of control block, multi-port register file, program counter, and ALU. An efficient four-phase clock generator is also designed to provide power clocks for adiabatic processor. Adiabatic circuits based on efficient charge recovery logic(ECRL), are designed 0.35,${\mu}{\textrm}{m}$ CMOS technology. Conventional CMOS processor is also designed to compare the energy consumption of microprocessors. Simulation results show that the power consumption of the adiabatic microprocessor is reduced by a factor of 2.9∼3.1 compared to that of conventional CMOS microprocessor.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.13 no.6
• /
• pp.1117-1122
• /
• 2009

In this work, temperature sensor and control circuit for measuring temperature are proposed. The proposed circuit can be fabricated without additional CMOS fabrication process and the output of proposed circuit is digital value. The supply voltage is 5volts and the circuit is designed by using 0.5${\mu}m$ CMOS process. The circuit for measuring temperature consists of PWM control circuit, VCO, counter and register. consisted The frequency of PWM control circuit is 23kHz and the frequency of VCO is 416kHz, 1MHz and 2MHz, respectively. The circuit operation is analyzed by using SPICE.

• Journal of Korea Society of Industrial Information Systems
• /
• v.13 no.5
• /
• pp.98-105
• /
• 2008

Zigbee communication is applied in the many communication system. This paper is the system development contents which applies a zigbee communication. The system which develops from this paper is apply a zigbee communication in order system Does so, Reduced the step of orders from employee or from counter. Because of that, reduced the order number of times which goes wrong and shortened a time. Reasoning is caused by prevented an order delay at busy time. Order and payment are together controlled from inside the program which is developed. The adjust of the present state of sale does not have a necessity. Because that is stored at Database.

• Korean Security Journal
• /
• no.2
• /
• pp.211-226
• /
• 1999

Troublesome problems are being caused by hallucinogenic drugs which come not only from illegal narcotics but also from unprohibited general drug-kinds such as cough-remedy agents of textromerupan, namely, Lamina, Rubi-king and the likes. Abuse and misuse of narcotics permeated into and threatens mental health of socially-known peoples, actor, actress, talents and businessmen as well. This study especially dealt with problems related with Mesampetamin, Rurajaepam, Texstrometropan and Karisofrodol which affects mental behaviour, and considered counter-measures through analysis and developed appropriate system of goods circulation for guidance to be complied by the medicine professionalists. The guidance sought here is recommended to the government ministries for further enforcement of crack-down of the drug crimes. Arquesa in method is recommend as a method of identifying behaviors and facial expressions of abusers and misusers of narcotics at the spot in place. This study is directed to curtailing hallucinogenic drugs use for absolute preventive security by detecting out black dealers of narcotics supplying to the abusers and misusers. There is a need of special education program to cut off the flow of narcotics or drugs crimes into official security force as well as private security personnel. This study introduced a priority and emphasis of real augmentation to theory and practice of the modern scientific security which can protect the mental health of the guarded persons as well especially in the light of security safety curriculum at the school.

• Journal of Educational Research in Mathematics
• /
• v.13 no.3
• /
• pp.365-382
• /
• 2003

This study intends to develope and apply mathematical activities for gifted students. According to the Polya's research and Krutetskii's study, mathematical activities were developed and observed. The activities were aimed at discovery of Euler's theorem through exploration of soccer ball at first. After the repeated application and reflection, the aim and the main activities were changed to the exploration of soccer ball itself and about related mathematical facts. All the students actively participated in the activities, proposed questions need to be proved, disproved by counter examples during the fourth program. Also observation, conjectures, inductive arguments played a prominent role.

• The Bulletin of The Korean Astronomical Society
• /
• v.36 no.2
• /
• pp.151.2-151.2
• /
• 2011

IGRINS (Immersion GRating INfrared Spectrometer) will provide the spectra with high-resolution and an instantaneous spectral coverage of H and K band in NIR region. Therefore, it is expected that the wide coverage of wavelength would make a production of an extensive NIR high-resolution spectra of standard stars as a prior program of IGRINS. As a counter part of these NIR spectra, we have planned to obtain the high-resolution spectra of those standard stars in optical band. These optical high-resolution spectra would give us an opportunity to produce the library of high-resolution stellar spectra covering from optical to NIR band, and to confirm the method to determine the stellar parameters and chemical abundances from the NIR high-resolution spectra. Before using the NIR high-resolution spectra, we have tested the method to determine the stellar parameters by comparing between the observed spectra and the synthetic spectra in optical band. In order to make the synthetic spectra, we have used the Kurucz ATLAS9 model grids and the SYNTH code described by Fiorella Castelli (http://wwwuser.oat.ts.astro.it/castelli/). For the cross-check against the parameters that would be derived from the NIR spectra, the stellar parameters such as effective temperature and surface gravity were determined using the optical spectra of the solar-like stars, as preliminary results.

• Journal of ILASS-Korea
• /
• v.14 no.4
• /
• pp.184-189
• /
• 2009

Recently, ultrafine particles emitted from internal combustion engine is main concern because of its well known adverse health effects. So Europe decided to start the regulation about diesel engine particle number emissions. The nanoparticles smaller than 50nm in diameter have the ability to penetrate deep into interstitial tissue of luge, where they may cause severe respiratory inflammation and acute pulmonary toxicity. Recent studies have showed that spark ignition engines emit particles number concentration comparable to those from diesel engines with DPF under high load and rich mixture conditions, including cold starts and acceleration. So this study investigated emission characteristics of ultrafine particles according to fuel injection type in gasoline vehicles and LPG vehicles. The test vehicles were tested on CVS-75 and NEDC vehicle test mode using the chassis dynamometer, CPC system applied as a particle measuring instrument at the end of dilution tunnel. As a result, the correlation between fuel injection type and particulate emission was determined. GDI vehicle emitted 10 times higher particles than PFI vehicles, and compared to Mixer and LPGI type LPG vehicle, LPLI vehicle emitted particles high.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.26 no.4
• /
• pp.412-422
• /
• 2020

Purpose: This study is aimed at preparing basic data to increase professionalism in nursing and effective counter-strategies against future infectious diseases. For that purpose, this study investigated the experiences of nurses in a general hospital with an 800-bed size, temporarily closed after a confirmed case of COVID-19. Methods: This study was a qualitative study using individual in-depth interviews, and data were collected from 10 nurses in a university hospital temporarily closed from May 1 to June 13, 2020. Results: As a result of this study, the subjects were classified into 'COVID-19 and nursing', 'nursing work and vocation' and 'life changed with COVID-19'. Conclusion: In conclusion, there is a need for education that nurtures the ability of nurses to screen patients with infectious diseases well and to skillfully wear and remove protective clothing. In addition, in order to cultivate the expertise of nurses and respond efficiently to infectious diseases, a separate compensation, such as a risk allowance, is required along with the establishment of an infrastructure that fully supports personnel and supplies. A mental health program to relieve stress is also required.