• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1505_1506
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• 2009

In this paper, micro cantilevers which are made of two different materials - fused quartz and single crystalline silicon - and have similar dimensions were fabricated and their mechanical Q-factors were evaluated to compare intrinsic damping properties of those two materials. Resonant frequencies and Q-factors were measured for the cantilevers having fixed widths and thicknesses, and different lengths. The measured Q-values are in a range of 64,000 - 108,000 for fused quartz cantilevers, and 31,000 - 35,000 for silicon cantilevers, respectively. Experimental results support high Q-factors of fused quartz compared to single crystalline silicon due to its good intrinsic damping properties.

• East Asian mathematical journal
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• v.35 no.3
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• pp.285-288
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• 2019

Let $F_n$, $n{\in}{\mathbb{N}}$ be the n - th Fibonacci number, and let (p, q) be one of ordered pairs ($F_{n+2}$, $F_n$) or ($F_{n+1}$, $F_n$). Then we show that the multiplicative inverse of q mod p as well as that of p mod q are again Fibonacci numbers. For proof of our claim we make use of well-known Cassini, Catlan and dOcagne identities. As an application, we determine the number $N_{p,q}$ of nonzero term of a polynomial ${\Delta}_{p,q}(t)=\frac{(t^{pq}-1)(t-1)}{(t^p-1)(t^q-1)}$ through the Carlitz's formula.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1278-1288
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• 2011

The purpose of this study was to classify subjective structure of observation experience toward delivery on nursing students. A Q-methodological approach that gives information about the way of analyzing the subjectivity of each item was used. Q population was performed for analyzing through interview and literature review. From this, ultimately, a final Q sample of 35 statements was obtained. The P sample sorted the Q sample for observation experience toward delivery. The collected data was analyzing using PC QUANL program, which revealed three distinctive types of delivery experience about nursing students. Type 1 is a sympathy towards delivery woman, type 2 is a requirement of care. And type 3 is a future of analogical inference of delivery type. In conclusion, it is needed not only to give high quality of nursing service but also to have a right job value based on proper understanding of patient. Also, it is recommended about education of nursing students for making right view of value based on the three types of delivery experience.

• Bulletin of the Korean Chemical Society
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• v.35 no.2
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• pp.587-596
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• 2014

A new ${\pi}$-stacked donor-acceptor (D-A) system, [Ru(1-([2,2'-bipyridine]-6-yl-methyl)-3-(2-cyclohexa-2',5'-diene-1,4-dionyl)-1H-imidazole)(2,2':6',2"-terpyridine)]$[PF_6]_2$ (ImQ_T), has been synthesized and characterized. Similar to its precedent, [Ru(6-(2-cyclohexa-2',5'-diene-1,4-dione)-2,2':6',2"-terpyridine)(2,2':6',2"-terpyridine)]$[PF_6]_2$ (TQ_T), this system has a cofacial alignment of terpyridine (tpy) ligand and quinonyl (Q) group, which facilitates an electron transfer through ${\pi}$-stacked manifold. Despite the presence of lowest-energy charge transfer transition from the Ru-based-HOMO-to-Q-based-LUMO (MQCT) predicted by theoretical calculations by using time-dependent density functional theory (TD-DFT), the experimental steady-state absorption spectrum does not exhibit such a band. The selective excitation to the Ru-based occupied orbitals-to-tpy-based virtual orbital MLCT state was thus possible, from which charge separation (CS) reaction occurred. The photo-induced CS and thermal charge recombination (CR) reactions were probed by using ultrafast visible-pump/mid-IR-probe (TrIR) spectroscopic method. Analysis of decay kinetics of Q and $Q^-$ state CO stretching modes as well as aromatic C=C stretching mode of tpy ligand gave time constants of <1 ps for CS, 1-3 ps for CR, and 10-20 ps for vibrational cooling processes. The electron transfer pathway was revealed to be Ru-tpy-Q rather than Ru-bpy-imidazol-Q.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.281-290
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• 2019

This study analyzed the recognition types of the economic burden for cancer treatment and the characteristics of each recognition type by employing Q methodology. For this study, we determined the final 45 Q statements by conducting literature surveys, internet searches and in-depth interviews. The P samples are 35 people of cancer patients, their family members, and experts. The Q statements were classified according to the forced normal distribution method and the collected data was analyzed using the PC QUANL program. For the analysis results, we extracted four recognition types on the economic burden of cancer treatment, and we named them 'uncertain anxiety', 'acceptance by family burden', 'object to challenge with active response' and 'insurance preparation', depending on their characteristics. The results of this study can be used as a basis for preparing the clinical intervention plan and the policies for cancer patients and the families involved in the fields of medicine, nursing and social welfare.

• 한국노년학
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• v.41 no.1
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• pp.85-105
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• 2021

The purpose of this research is to analyze care types in long-term care facilities with the view of Active Ageing by using Q-methodology. In-depth interviews were conducted to grasp various thoughts on care of long-term care facilities in three areas of WHO's active aging: health, safety, and participation. 35 people participated in the interview, including the elderly living in long-term care facilities, adult children of the elderly living in long-term care facilities, the elderly living in the community, service providers, and long-term care professionals. Of the 451 Q populations, 63 Q samples were extracted, and a total of 43 P samples were used for final data analysis. Data were analyzed using the QUANL program, and as a result, three factor structures (4 types) were found to be suitable and accounted for 30.15% of the total variance. Current care types in long-term care facilities were analysed into 4 types: protection-oriented care (type 1), participation-oriented care (type 2), medical-connected care (type 3), and human-centered care (type 4). Based on the results of this study, institutional and practical suggestions and implications were presented for the qualitative change of care in long-term care facilities.

• Magazine of korean Tunnelling and Underground Space Association
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• v.9 no.2
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• pp.35-49
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• 2007

• Communications of the Korean Mathematical Society
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• v.35 no.2
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• pp.487-497
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• 2020

In this paper, we establish a complex matrix representation of the Clifford algebra Cℓ_p,q. The size of our representation is significantly smaller than the size of the elements in L_p,q(ℝ). Additionally, we give detailed information about the spectrum of the constructed matrix representation.

• Journal of applied mathematics & informatics
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• v.35 no.1_2
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• pp.113-120
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• 2017

In this paper, we introduce degenerate tangent numbers ${\mathcal{T}}^{(k)}_{n,q}({\lambda})$ and tangent polynomials ${\mathcal{T}}^{(k)}_{n,q}(x,{\lambda})$ of higher order. Finally, we obtain interesting properties of these numbers and polynomials.

• Journal of applied mathematics & informatics
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• v.35 no.1_2
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• pp.205-215
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• 2017

In this paper, we consider a modified Euler polynomials ${\tilde{E}}_{n,q}(x)$ with variable $[x]_q$ and investigate some interesting properties of the Euler polynomials. We also give some relationships between the modified Euler polynomials and their Hurwitz zeta function. Finally, we derive some identities associated with Bernstein polynomials.