• Korean Institute of Interior Design Journal
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• no.25
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• pp.142-148
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• 2000

The purpose of this study is to provide a practical guide for the actual conditions and the preference of student housing in a regional university. The data are collected through questionnaire surveys from the students of a regional university. 265 samples are collected, and are analyzed by using SPSS-PC. The results are as follows: 1) The actual conditions of student housing Most residents of student housing(76.3%) come from the Capital region. Most of student housing are located at 30 minute distance from the school. Most of house style are Offistel as one room style. Most of housing size are within 10 minute distance from the school. Most of house style are Offistel as one room style. Most of housing size are within 10py, and two people reside in one unit. The average hours of staying at the student housing are over 10 hours. The most inconvenient factor is the lack of soundproofing in the current student housing. 2) The preference of student housing The most preferred location is in the walking distance from the school, and the apartment is the most preferred housing style. The most preferred installation of inside is internet connection. When choosing student housing, students prefer the distance from the school as the most important factor. Most female students reside with a roommate within 10 py of housing size, cook for themselves, and consider rent and maintenance fee as the decision factors in choosing housing. The most preferred style of house is apartment, and they prefer to install basic furniture and kitchen system inside of housing. As students go up to higher grade, they prefer the apartment, and prefer to cook for themselves. More fresh men reside with a roommate compared to other grades. They prefer Offistel with meals service at a walking distance from the school.

• Progress in Superconductivity
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• v.9 no.1
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• pp.50-55
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• 2007

We have installed a 61-channel magnetocardiography (MCG) system inside a magnetically shielded room (MSR) with a size of $2.4\;m\;{\times}2.4\;m\;{\times}2.4\;m$. The MCG system consists of 1st-order axial gradiometers containing double relaxation oscillation SQUIDs (DROSs) with pick-up coils of a base line of 70 mm. The MSR holds a shielding factor of 50 at 0.1 Hz and 10000 at 100 Hz, when its door in the middle on a front wall is closed. On opening the MSR door, we have obtained the characteristics of the MCG system with a 2.9 Hz noise generated from an air conditioning unit at 13 m distance off the MSR. In an open-door MSR ($140^{\circ}$ opening), a noise at the center channel increases up to $700\;fT/Hz^{l/2}$ at 2.9 Hz and $1.7\;pT/Hz^{1/2}$ at 60 Hz. MCG signals for a healthy human do not show distortion until the door opens to $45^{\circ}$, but show the effect of noise when the door opens further at $90^{\circ}$ and $140^{\circ}$. With the door opens to $45^{\circ}$, MCG measurement can be performed with ease of door operation and without creating claustrophobia for the patient.

• Journal of the Korean Institute of Rural Architecture
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• v.15 no.2
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• pp.25-32
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• 2013

The purpose of this study is to analyze the residential space composition and extension of Jeonja-jip and Dureong-jip in Samcheok region. The results of this study are as follows. It appears three residential plan types - Jeonja-jip with Anmaru(a room made of wooden floor), Jeonja-jip without Anmaru and Dureong-jip with Anmaru- in survey region. It was needed the extension of residential space at Jeonja-jip(a house type with two-row rooms which be composed of 田type under one roof) and Dureong-jip(a house type with inner floor which be surrounded by rooms under one roof) because of shortage of sleeping space, working space and keeping space owing to growing large family. The solutions of these shortages will be the extension of space in houses. Jeonja-jip's basic type which is the Kyup-Jip(a house type with two-row rooms under one roof) of 一 type with 6 Kans(Kan, a unit to count room to divided with four posts) is transformed and extended to 田shaped house with 11 Kans toward X-axis orientation. Dureong-Jip's basic type which is ㄱ type with 7 Kans is transformed and extended to the Sekyup-Jip with 9 Kans and the Nekyup-Jip(a house type with four-row rooms under one roof) with 12 Kans toward Y-axis orientation by insertion and addition. Jeonja-jip was developed into Kyup-Jip with front 4 or 5 Kans and side 2 Kans instead of being done into Sekyup-jip or Nekyup-Jip with insufficient day lighting and ventilation problems. Jeonja-jip and Dureong-jip were stronger than any other traditional houses in tendency to reserve Magu(cowshed) and Chikkan(toilet) in a house.

• Journal of the Korean housing association
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• v.25 no.1
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• pp.63-71
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• 2014

This research is aimed to analyze the basic characteristics of the 16 floor plans of 4 small-sized apartments in DaLian-City. Recently, there are increasing that a small-sized apartments for new younger generation in China. The younger ages intend to got a new floor plan types apartments according to own's life style. Also, a lot of construction company showed the many types of new residential space design during the last about 10 years, in DaLian City. The research results are summarized as follows: First, all of the floor plan types were '-' shape, 'L' shape. Second, there were several co-relational types of space plan between living room, kitchen and dining space. Those are LDK, L K, L DK, LD K. Third, the bedroom of the $30m^2$-floor plan size has an open-space design but over the size of $40m^2$-floor plan the space is closed design. Fourth, The number of bathrooms in all the floor plans is just 1 and it's placed beside the entrance except for B3, C4. The basic equipments of the lavatory was a toilet, a washbowl, a shower. A bathtub is installed in the floor plans greater than $60m^2$. Fifth, almost all of the characteristics of the spatial interrelation - each room position order - based on the location of the entrance. In particular, almost all of the bedrooms are furthest from the entrance for the most privacy.

• The Korean Journal of Emergency Medical Services
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• v.6 no.1
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• pp.15-26
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• 2002

As a result of analyzing problems in field practice and its effects, the following conclusions can be obtained. Man students were more satisfied with their choice of this department than woman students and woman students recognized the importance of hospital practice although they felt the need of fire fighting station practice and man students felt the necessity of hospital practice, but they answered the fire fighting station practice was important. Departments of field practice are emergency and nurse departments in hospitals and emergency aid section in fire fighting stations. And it is found that field practice was performed well in relation to major subject. Areas of practice included emergency room, operation room and extensive cure unit and the experience of ambulance was more in fire fighting station than in hospital. Clinical guidance of professor was preferred to once a week and the students answered they felt satisfaction with practice through conference. Answer that field practice was helpful in understanding class was very high as 96.8% and its connection with employment was low as 12.8%. It is found that a proper timing of field practice was winter vacation for hospital practice after completing the second semester of the first year and summer vacation for fire fighting station practice after the first semester of the second year. The most difficult department in field practice was nurse department in hospital because 'respondents were practice students' and administrative department in fire fighting stations because 'they lacked recognition of paramedic'. In making practice diary, 'describing measure results' was difficult most and the respondents wanted to keep the diary in their custody.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.25 no.1
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• pp.22-32
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• 2018

Purpose: The study was done to examine hemodialysis unit nurses' knowledge on blood-borne infections, compliance and barriers to control and predictors of compliance. Methods: A descriptive correlational study was conducted with 122 nurses from hemodialysis units. Data were collected using a structured questionnaire. The data collection period was May to September, 2017. Data were analysed using descriptive statistics, t-test, ANOVA, Pearson correlation, and multiple linear regression. Results: The mean score for knowledge on blood-borne infections was $15.41{\pm}2.01$ out of 19 and the compliance with blood-borne infection control was $4.08{\pm}0.49$ out of 5. Barriers to the performance of blood-borne infections control were lack of time and personal protective devices. Knowledge on blood-borne infection did not correlate with compliance on blood-borne infection control (r=.13, p=.171). Predictors of compliance on blood-borne infections control were 1) infection control education on injuries caused by injection needles (${\beta}=.23$, p=.010), 2) infection control room (${\beta}=.24$, p=.006) and 3) blood exposure experience over the past week (${\beta}=-.24$, p=.005) and explained 22.2% of the variance (F=10.81, p<.001). Conclusion: Findings suggest that to improve the performance of blood-borne infectious disease management, customized education for nurses on blood-borne infection and systematic support related to the infection control room should be given priority.

• Journal of Advanced Navigation Technology
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• v.16 no.5
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• pp.773-780
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• 2012

ZOR(zeroth order resonance) antenna for 2.45GHz WLAN(wireless local area network) is designed by use of CRLH-TL(composite right left handed transmission line) meta-material. The electrical length of conventional antennas is determined generally according to the resonant frequency, whereas that of ZOR antenna can be determined without reference to the resonant frequency. Therefore ZOR antenna has advantage in miniaturization of antenna in comparison with conventional antennas. In order to design such ZOR antenna, first unit cell with electrical length shorter than a quarter wavelength at 2.45GHz is designed to the some characteristics of homogeneous medium. In order to decrease resonant frequency and enhance frequency bandwidth, the proposed antenna is fed by CPW(co-planar waveguide) and short stub between radiation patch and ground plane is used for obtaining both higher inductance and smaller capacitance than previous mush-room type of CRLH-TL.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.454-454
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• 2011

Graphene shows unusual electronic properties, such as carrier mobility as high as 10,000 $cm^2$/Vs at room temperature and quantum electronic transport, due to its electronic structure. Carrier mobility of graphene is ten times higher than that of Silicon device. On the one hand, quantum mechanical studies have continued on graphene. One of them is quantum Hall effect which is observed in graphene when high magnetic field is applied under low temperature. This is why two dimension electron gases can be formed on Graphene surface. Moreover, quantum Hall effect can be observed in room temperature under high magnetic field and shows fractional quantization values. Quantum Hall effect is important because quantized Hall resistances always have fundamental value of h/$e^2$ ~ 25,812 Ohm and it can confirm the quantum mechanical behaviors. The value of the quantized Hall resistance is extremely stable and reproducible. Therefore, it can be used for SI unit. We study to measure quantum Hall effect in CVD graphene. Graphene devices are made by using conventional E-beam lithography and RIE. We measure quantum Hall effect under high magnetic field at low temperature by using He4 gas closed loop cryostat.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.08a
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• pp.93-93
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• 2003

Photoluminescence(PL) properties of Silicon nanocrystals (nc-Si) as a function of temperature is reported to consider the mechanism of PL. Nc-Si has been made by $Si^+$ ion-implantation into thermal $SiO_2$ and subsequent annealing. And after gold had been diffused at the same samples above, the resultant PL spectra has been compared to the PL spectra from the non-gold doped nc-Si. PL peak energy variation from nc-Si is same with the variation of energy bandgap of bulk silicon as temperature changes from 6 K to room temperature. This result may mean nc-Si is still indirect transition material like bulk silicon. Gold doped nc-Si reveals short peak wavelength of PL spectrum than gold undoped one. PL peak shift through gold doing process shows clearly the PL mechanism is not from defect or interface states. PL intensity increases from 6K to a certain temperature and then decrease to room temperature. This characteristic with temperature shows that phonon have a role for the luminescence as theory explains that electron and hole can be recombined radiatively by phonon's assist in nc-Si, which is almost impossible in bulk silicon. Therefore luminescence is observed in nc-Si constructed less than a few of unit cell and the peak energy of luminescence can be higher than the bulk bandgap energy by the bandgap widening effect occurs in nanostructure.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.2
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• pp.325-335
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• 1992

In this work, direct contact 4-stage fluidized bed heat exchanger is experimentally studied to develop a new type of heat exchanger which recovers the energy contained in the high temperature waste gas exhausted from the industrial furnaces. A sand is used as a heat transfer medium in this experiment. To determine the optimum operating condition, 11 different perforated plates which have a different free area ratio with different hole diameter are used in the experiment. From the room temperature experiment, the pressure drop which is caused by fluidized bed formation is observed. The high temperature experiment is carried out to seek the optimum operating condition of high heat efficiency at low heat exchanger operation cost. The results of experiment are as following. The pressure drop in the high temperature condition can be predicted from the results of the room temperature experiment. And Nusselt number becomes smaller due to the increased interference between sand particles as Reynolds number increases when the dilute phase fluidized beds are formed in nigh temperature condition. But heat transfer amount through the total sand surface area become larger due to the large resident amount of sand. Considering the heat transfer amount and the heat exchanger operation cost, perforated plates which have either a 30% or 35% of free area ratio with 15mm of hole diameter are best fitted for our goal of this work. The values of .phi. which is a dimensionless number representing the absorption heat amount per unit sand rate are in the range from 0.4 to 0.5, when Reynolds number of waste gas ranges from 25-30 with these perforated plates.