• International Journal of Reliability and Applications
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• v.7 no.1
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• pp.41-53
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• 2006

The exact cause of the system's failure is often unknown in the masked system lifetime data. In such type of data, there are two observable quantities, namely (i) the systems time to failure and (ii) the set of systems components that contains the component, which might cause the system to fail. Our objective in this paper is to use the maximum likelihood procedure in the presence of masked data to make inference for the reliability of the system's components. We assume a multi-component series system where each component has a constant failure rate. Different cases that permit for closed form solutions of point estimates are considered. The results obtained in this paper generalize other published results.

• Journal of applied mathematics & informatics
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• v.14 no.1_2
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• pp.353-363
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• 2004

The purpose of this paper is to present a model to design the layout of the user interface components that handles many numbers of qualitative factors. An alternate rating system is also proposed for the closeness relationship ratings between the various pairs of components evaluated by using GOMS (goals, operators, methods and selection rules) technique. The proposed model is applied to the design of the part of the user interface in order to obtain the best layout of the components. The results of the proposed model are compared with that of an existing model, which handles single qualitative factor applied to obtain the layouts of user interface components.

• Bulletin of the Korean Mathematical Society
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• v.57 no.2
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• pp.331-343
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• 2020

This paper is concerned with the global behavior of components of radial nodal solutions of semilinear elliptic problems -Δv = λh(x, v) in Ω, v = 0 on ∂Ω, where Ω = {x ∈ R^N : r₁ < |x| < r₂} with 0 < r₁ < r₂, N ≥ 2. The nonlinear term is continuous and satisfies h(x, 0) = h(x, s₁(x)) = h(x, s₂(x)) = 0 for suitable positive, concave function s₁ and negative, convex function s₂, as well as sh(x, s) > 0 for s ∈ ℝ \ {0, s₁(x), s₂(x)}. Moreover, we give the intervals for the parameter λ which ensure the existence and multiplicity of radial nodal solutions for the above problem. For this, we use global bifurcation techniques to prove our main results.

• Journal of Ginseng Research
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• v.20 no.3
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• pp.274-283
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• 1996

In this study, the effects of red ginseng components [ginsenosides (total saponins and $Rg_1$) on the function of ryanodine receptor (RyR) -$Ca^{2+}$ release channel complex protein (named as RyR or $Ca^{2+}$ channel), a membrane protein in sarcoplasmic reticulum (SR) of rabbit skeletal muscle were examined at the SR vesicle's level and the molecular levels with Chaps-solubilized and purified $Ca^{2+}$ channel protein and with reconstituted proteoliposomes by dialysis. The results were as follows. 1. The binding of ryanodine known as inhibitor of muscle contraction to the RyR was decreased at the whole range of concentration ($10^2$~$10^7$%) by these two ginseng components. In heavy SR vesicles, Chaps-solubilized and purified $Ca^{2+}$ channel protein, and reconstituted vesicles, its maximal inhibition by total saponins was shown at the concentration of $10^3$, $10^3$%, and $10^5$% respectively, and by gin- senoside $Rg_1}$) each was $10^3$%, $10^3$%, and $10^4$%. 2. The release of $Ca^{2+}$ ion through $Ca^{2+}$ channel in heavy SR vesicles and reconstituted proteoliposomes was increased as a whole by these two ginseng components, and particularly maximal release by both of them was shown at the range of $10^4$~$10^6$%. These results were seemed to be caused by conformational change of $Ca^{2+}$ release channel protein (RyR) by red ginseng components [ginsenosides (total saponins and $Rg_1}$).

• Journal of Korean Public Health Nursing
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• v.5 no.2
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• pp.53-66
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• 1991

The Purpose of this study is to provide the basic data necessary for the high level of nursing service and the efficiency plan of nurse's man power by analyzing job satisfaction level of public health services. The study population included all public health services(118) in health care center within Jeon Buk province. A Survey was conducted to collect data by a self-administered questionnaire from September I to December B, 1990. A Forty item questionnaire was designed to elicit data concerning how nurses feel about the factors of job satisfaction. All the data were analyzed by means of percentage, mean, anova, T-test, Pearsen's correlation coefficient. The Results of this study were summerized as follows. 1. General characteristics of PHN : age: $33.9\%\;20\~29$ years old education level: $52.6\%$ professional nursing college marital status: $75.5\%$ married religion: $50.5\%$ protestant clinical experience: $40.7\%$ no clinical experience public health nursing career: $47.9\%$ low 5years 2. Influencing factor of Job satisfaction desired duration of employment: $65\%$ needed duration, $18.3\%$ lifetime duration motives of employment: $40.8\%$ no special motive of employment desired organ of leave: $19.3\%$ public health clinic 3. Level of job satisfaction with job satisfaction components. The level of job satisfaction showed an average score 3.39 out of 5.0. Job prestige 4.09 was the highest among the components of Job satisfaction and was presented organizational requirement 3.69, Human relationship 3.66, task requirement 3.36, Autonomy 3.10, pay 2.46. 4. Level of job satisfaction with general characteristics. General characteristics(age, educational level, manital status, clinical experience, public health nursing carrier, duties, lincense and qualification) and job satisfaction was no relationship. 5. Level of job satisfaction with Influencing factor. Duration of desired employment (p<0.01) and motives of employment(p<0.001) was presented. 6. Relationship composing factor of job satisfaction and level of job satisfaction 6 components of job satisfaction was related all of job satisfaction. organizational requirement (r=0.93). Autonomy (r=0.93), Human relationship(r=0.92), task requirement (r=0.90), job prestige (r=0.83), pay (r=0.81)

• Publications of The Korean Astronomical Society
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• v.30 no.2
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• pp.231-232
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• 2015

R Canis Majoris is a bright, short-period ($1^d$.1359) Algol-type eclipsing binary. For a long time, it was considered to be a low-mass binary star with $M_1=1.1M_{\odot}$ and $M_2=0.17M_{\odot}$ primary and secondary components, respectively (Tomkin, 1985). Glazunova, Yushchenko & Mkrtichian (2009) found new masses for the primary and secondary components of $M_1=1.81M_{\odot}$ and $M_2=0.23M_{\odot}$, respectively and resolved a long-standing problem with the low masses of components for this binary. Budding and Butland (2011) confirmed the results of Glazunova, Yushchenko & Mkrtichian and obtained improved orbits and masses. New spectroscopic observations of R CMa were done during 8 nights on December 2012 with the 2.4-meter telescope of the Thai National Observatory (TNO) and fibre-fed medium resolution echelle spectrograph. We obtained new, accurate orbital radial velocities of the two components of this binary system. Results of these investigations and the new orbital parameters are presented.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.579-580
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• 2009

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.463-465
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• 2006

We have developed the VIC (Viewing-angle Image Control) TFT-LCD, which can change viewing-angle from $80^{\circ}$ to $170^{\circ}$. This display has the same thickness and weight as existing TFT-LCD, because it is made of only single LC cell without additional components. Moreover, we developed ways to protect effectively the displayed information in narrow viewing angle mode.

• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1840-1842
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• 2003

This paper describes an experiment of detecting a temperature and components of arc plasma of electrical circuit breaker with a spectroscopic system. The system includes an optical fiber, a monochromator which has three gratings from low to high resolution and ICCD of which time resolution is 50 ns. This system enables measuring a temperature and components of arc plasma of a circuit breaker which is generated and extinguished in a few ms. We use a Planck's law and Boltzmann Plot method for calculating a temperature of arc plasma. A Xenon lamp is used for calibrating the system and this is very important for calculating a temperature of arc plasma. In this study, Arc plasma of Ag and Cu contact was investigated and these represent the contact of low voltage and extra-ultra high voltage circuit breaker, respectively. 8 $kA_{rms}$ test current was applied with a capacitor bank.

• Animal cells and systems
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• v.4 no.1
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• pp.77-85
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• 2000

This study has demonstrated the molecular variation of 5S rRNA genes in 15 Allium subgenus Rhizirideum and 1 Allium subg. Allium. For cloning of the 5S rRNA genes, PCR products were obtained from amplification with oligonucleotide primers which were derived from the conserved coding region of 5S rRNA genes. These amplified PCR products were cloned and identified by FISH and sequence analysis. The 5S rRNA loci were primarily located on chromosomes 5 and/or 7 in diploid species and various chromosomes in alloploid species. The size of the coding region of 5S rRNA genes was 120 bp in all the species and the sequences were highly conserved within Allium species. The sizes of nontranscribed spacer (NTS) region were varied from 194 bp (A. dektiude-fustykisum, 2n=16) to 483 bp (A. sativum). Two kinds of NTS regions were observed in A. victorialis var. platyphyllum a diploid, A. wakegi an amphihaploid, A. sacculiferum, A. grayi, A. deltoide-fistulosum and A. wenescens all allotetraploids, while most diploid species showed only one NTS region. The species containing two components of NTS region were grouped with different diploid species in a phylogenetic tree analysis using the sequences of 5S rRNA genes and adjacent non-coding regions.