• The Journal of the Korea Contents Association
• /
• v.18 no.4
• /
• pp.480-494
• /
• 2018

The purpose of this study is to develop a nursing activity cost calculation program based on Lee's doctoral dissertation using TD-ABC. The developed program has been supplemented with data storage, print out, and graph conversion functions to expand the application possibility. The development of the program consisted of three steps: program requirements analysis, program design and development, and program validation. This program was designed not only to do the cost calculation, but also to compare the cost-effectiveness and cost consumption trends. Consequently, this program is meaningful in that the nursing manager can obtain the cost information necessary for nursing unit management and extend the utilization so that the cost management strategy can be established based on the cost information. Therefore, we propose that the cost-management capacity of clinical nurses should be strengthened and the nursing performance measurement research should be expanded by applying it to various actual clinical nursing management settings. It is suggested that this program should be used as a training medium to strengthen nurse cost management capacity by combining nursing management curriculum at undergraduate level.

• Transactions on Electrical and Electronic Materials
• /
• v.2 no.1
• /
• pp.7-11
• /
• 2001

We measured the electron transport coefficients, the electron drift velocity, W, and the longitudinal diffusion coefficient, $D_{L}$, over the E/N range from 0.03 to 100 Td and gas pressure range from 0.133 to 122 kPa in the 0.526% and 5.05% $C_{3}F_{8}$-Ar mixtures by the double shutter drift tube with variable drift distance. And we calculated these electron transport coefficients by using multi-term approximation of Boltzmann equation analysis. We determined the electron collision cross sections set for $C_{3}F_{8}$ molecule by the comparison of measurement and calculation. Our special attention in the present study was focused upon the inelastic collision cross sections of the $C_{3}F_{8}$ molecule.

• Korean Journal of Veterinary Research
• /
• v.31 no.1
• /
• pp.49-53
• /
• 1991

The present study has been carried out to investigate the optimal condition on lymphocyte blastogenesis of rabbit lymphocytes, whole blood culture and microculture system in conjunction with a semiautomatic multiple sample harvester(SAMSH) was used to study the In vitro optimal condition of rabbit lymphocytes. Data were presented to show many variables that are involved in studying the phytohemagglutinin(PHA) and lipopolysaccharide(LPS) response of rabbit lymphocyte in a microculture system. Analysis indicated that the conditions for optimal PHA as measured by incorporation of $^3H$-TdR include: (1) use of RPMI-1640 as culture medium. (2) use of $6{\mu}g$ of PHA, per culture. (3) 48-hours culture period. Conditions for optimal stimulation with LPS mitogen were similar to those used for PHA.

• Bulletin of the Korean Chemical Society
• /
• v.3 no.1
• /
• pp.5-9
• /
• 1982

Reactions of cobalt(II) chloride with 2,2'-dipyridylamine (dpa) in alcoholic solutions afford the complex of octahedral $Co(dpa)_2Cl_2{\cdot}CH_3OH$. The octahedral complex is converted to tetrahedral $Co(dpa)Cl_2$ in certain solvents or at the elevated temperature, and the tetrahedral complex is changed to the octahedral one with added dpa. The electronic spectra of the complexes in DMF, measured with various concentrations of 2,2'-dipyridylamine, establish the equilibrium; $td-Co(dpa)Cl_2+dpa_\rightleftarrows^Koh-Co(dpa)_2Cl_2$. The equilibrium constants determined by the analysis of the visible spectra are 6.4, 3.6 and 2.0 $M^{-1}$, respectively, at 25.5, 38.0 and $49.0^{\circ}C,\;with\;{\Delta}H^{\circ}\;and\;{\Delta}S^{\circ}$being -9.5 kcal/mole and -28 eu.

• Journal of the Korea Society of Computer and Information
• /
• v.17 no.7
• /
• pp.77-86
• /
• 2012

Using OFDM(Orthogonal Frequency Division Multiplexing) provides the same diversity order as MRRC(Maximal Ratio Receiver Combining). It is assumed that fading channel is constant across two consecutive symbols. Unfortunately, when the channel condition is changed for the two consecutive symbols, the OFDM using STBC(Space Time Block Code) does not offer good performance due to the large doppler shift. In this paper, we have proposed a performance enhancement scheme for OFDM using STBC over time-selective fading channel. Simulation results for various doppler shift rates are presented to robust system performance of OFDM due to using our proposed scheme over time-selective fading channel.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.17 no.1
• /
• pp.58-67
• /
• 1992

Optical absorption and photoluminescences(PL) of MgGa2Se4 and MgGa2Se4 : Co2+ single crustals were guown by the Bridgman method have been investigated in the visible and near-in frared regions. The optical absorption spectrum showed three absorption peak at 760 nm(13158nm, -1, 1.63eV), 1640nm(6097cm-1, 0.75eV).and 2500nm(4000cm-1,0.49eV) which are assigned the electronic transitions between the ground state and excited states of Co2+ ions with Td sym-metry in MgGa2Se4 host lattice. In PL spectrum the visible emission bands as well as the infrared emission band in these single cuystals are obserned. The visible emission bands are explained due to the radiative transitions of electrons from quasi continusly distributed tarps below the bottom of the conduction band to acceptor levels above the top of the valence band in the proposed energy level scheme. At the same time, it is considered that the infrated emission bands are attributed to electron transitions from the deep levels to the acceptor levels. The mechanism of the optical transition os well explained in terms of the energy diagram of MgGa2Se4.

• Journal of Korean Society for Atmospheric Environment
• /
• v.30 no.2
• /
• pp.95-109
• /
• 2014

In this study, the concentration of odorants released from albumin (EA) and yolk (EY) portions of boiled egg samples were determined as a function of storage time. The concentrations were measured at storage days of 0, 1, 3, 6, and 9 under room temperature. As such, odorants produced during both fresh and decay conditions were measured through time. A total of 19 compounds were selected as the main target odorants along with 12 reference compounds. GC-MS (for VOC) and GC-PFPD system (for sulfur gases) equipped with thermal desorption (TD) system were employed for odorant analysis in this work. The initial concentrations measured from the chamber system were converted into flux terms ($ng{\cdot}g^{-1}{\cdot}min^{-1}$). The EA showed the highest concentration of $H_2S$ (234 $ng{\cdot}g^{-1}{\cdot}min^{-1}$) at EA-0, and the concentrations of AT (Acetone) was also seen clearly in the range of 11.7 (EA-0) to 58.6 $ng{\cdot}g^{-1}{\cdot}min^{-1}$ (EA-9). The EY showed similar patterns. EtAl (Ethyl alcohol) increased 9.47 (EA-1) to 96.7 $ng{\cdot}g^{-1}{\cdot}min^{-1}$ (EA-9) in EA samples. Ketone, alcohol, sulfur groups generally exhibited high concentrations compared to other odorants. These data were also compared in relation to olfactometry related dilution-to-threshold (D/T) ratio by air dilution sensory (ADS) test and sum of odor intensity (SOI).

• Proceedings of the Korean Fiber Society Conference
• /
• 2003.04a
• /
• pp.339-340
• /
• 2003

섬유 고분자 물질의 물리적 성질은 물질의 화학적 구조뿐만 아니라 분자의 배향과 결정화도와 같은 내부 구조에 의해 크게 영향을 받는다. 적외선 분광법은 특정 segment의 배향과 conformation, 결정화도와 같은 내부 구조의 변화를 선택적으로 관찰할 수 있는 장점으로 인하여 섬유 고분자 물질의 연구에 널리 사용되고 있다. 특히 적외선 분광법의 한 방법인 ATR (Attenuated Total Reflection) 방법은 투과에 의한 방법으로는 관찰이 불가능한 fiber, fabric, coating, thick film과 같은 형태의 시료를 관찰 할 수 있는 특성이 있으며 무엇보다 가장 큰 장점은 시료의 Machine Direction (MD), Transverse Direction(TD), Normal Direction (ND)의 세 방향으로 필름의 3차원적 배향 분석이 가능하다는 점이다.$^{1)}$ (중략)

• Journal of the Korean Vacuum Society
• /
• v.3 no.3
• /
• pp.346-354
• /
• 1994

삼원화합물 반도체 CuAlSe2 및 CuGaSe2 단결정의 solid solution 인 CuAl1-xGaxSe2 및 cobalt를 2.0 mol% 첨가한 CuAl1-xGaxSe2 : Co2+ 단결정을 iodine을 수송물질로 사용한 화학수송법으로 성장시켰 다. source material로는 CuAl1-xGaxSe2 의 화학조성비에서 Se를 3.0mol% 과잉으로 첨가하여 합성한 ingot를 사용하였으며 불순물이 첨가된 CuAl1-xGaxSe2:Co2+ 단결정성장시에는 source ma-terial 에 cobalt 분말을 2.0mol% 첨가하였다. X-선 회절무늬로부터 성장된 단결정들이 chalcopyrite 결정구조를 하고 있음을 확인하였으며 격자상수를 구하였다. 광흡수 spectra 측정으로부터 성장된 단결정에서 나타 는 cobalt 불순물에 의한 광흡수 peak가 Td 대칭점에위치한 Co2+ 이온의 에너지 준위들간 전자전이에 의해 나타남을 규명하였다.

• Journal of the Korean Vacuum Society
• /
• v.3 no.3
• /
• pp.355-359
• /
• 1994

Cd1-xCoxIn2Se4(X=0.50) 결정을 수직 Bridgman 방법으로 성장시키고 성장된 결정의 결정구조 및 XPS 특성을 연구하였다. 성장된 결정은 pseudocubic 구조이고 격자상수는 a=5.778$\AA$으로 주어졌다. Cd1-xCoxIn2Se4 결정의 각 성분원소인 cadmium cobalt indium 그리고 selenium에 대한 XPS spectrum으 로부터 결합에너지와 결합상태를 조사하였다. Cd1-xCoxIn2Se4결정과 결합하지 안는 각 성분원소인 cadium cobalt imdium 그리고 selenium에 대한 core level의 XPS spectrum과 비교하면 각 성분원소상 이의 결합에 의한 chemical shift 현상 때문에 core level의 결합에너지가 0.10~4.87 eV 차이가 있다. Cd1-xCoxIn2Se4 결정에서 Co 2P3/2 core level의 주 peak와 statellite peak와의 결합에너지 차이로부터 cadmium과 치화된 cobalt는 Co2+ ion으로 Td symmetry 점에 위치함을 알 수 있다.