• Journal of Communication Design
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• v.39
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• pp.82-90
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• 2012

The present study is focused on investigating the subjective viewpoint of users favoring Galaxy phones as an element for emotional experience designs, and Q methodology used for the study of subjectivity has revealed 3 types. The first type is a type pursuing reasoned actions with high expectations for the emotional quality through direct and indirect experiences of Galaxy phones. They were shown to place an emphasis on portability and usability while having a low preference for the shape of external forms and materials. The second type is a type pursuing planned actions with an emphasis on individual subjective perceptions as well as both of physical sensation and usability. They were distinguished as a type preferring pleasure and efficiency experienced by its use. The third type is a type pursuing differentiated personalities with an emphasis on messages they want to deliver to other people through the products owned by an individual. They were identified as a type emphasizing display of personalities through differentiation in aesthetic elements.

• Journal of the Korea Convergence Society
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• v.9 no.7
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• pp.277-283
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• 2018

This research was attempted to understand the types of the subjectivities possessed by the individuals regarding the management of the health of the skin on the part of the female university students by applying the Q-methodology and to comparatively analyze the special features. Regarding the subjects of the research, 41 female university students at one university were made into the P-samples. And, by selecting 34 Q-samples from the total of 141 Q-populations, the forced distribution took place in terms of the 9-points scale. The subjects were interviewed, and the contents regarding interviews were recorded. The data were analyzed with the QUANL program. As a result of the research, the 4 types were discovered. They appeared as 'the professional knowledge pursuing type', who consider the expertise regarding the skin management important, 'the nature-oriented type', who express the importance of the skin rather than the functional, cosmetic products, 'the active self- management type', who pursue the highly-functional cosmetic products and the active skin management, and 'the self-ostentation type', who consider the external parts, rather than the health, important. As a result, based on the results of this research, the special characteristics by each type regarding the skin health management of the female university students must be understood, and a differentiated educational method or approach method for the skin health management resulting this must be considered.

• East Asian Economic Review
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• v.23 no.4
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• pp.353-379
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• 2019

This paper aims to determine factors causing the stagnation of Korean firms' fixed investment after the global financial crisis, using panel data for the period of 1999-2016. Fixed investment remained sensitive to cash flow and Tobin's q although their effects decreased after the global financial crisis. A decreasing trend of cash flow and an increase in Tobin's q since the early 2000's imply that the worsening cash flow was a major factor behind the sluggish investment after the crisis. Meanwhile, debt-equity ratio remained significant for non-chaebol affiliated firms, reflecting disparity in access to external financing. Volatility of stock returns also became insignificant after the crisis, casting doubt on the argument that uncertainty was a major factor contributing to the decline of fixed investment. Analysis of financial investment confirmed the significant effect of cash flow, larger than that on financial investment than on fixed investment. In particular, debt repayment and other financial investment, except share repurchase, were sensitive to cash flow. However, the substitution of fixed investment by financial investment is a consequence, rather than a cause of declining fixed investment.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.24 no.8
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• pp.669-673
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• 2011

The charged particle type display is a kind of the reflectivity type display and shows an image by absorption and reflection of external light source, which has keep an image without additional electric power because of bistability. In this paper, we made a device whose cell gap is $56\;{\mu}m$ and also analyzed driving and memory characteristics by applied driving voltages. As a result, we found that the driving voltage and memory effect depend on q/m(charge to mass ratio) of charged particle. In this case of breakdown voltage, the devices showed degradation of reflectivity and memory effect due to irregular movement of overcharged particles. In addition, contrast ratio of the device varies with memory effect. Thus, we consider that device needs uniform q/m for improvement of electric and optical properties and memory effect.

• Journal of Korean Academy of Nursing Administration
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• v.2 no.2
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• pp.17-42
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• 1996

Most human behaviors are based on self-perceptual image. Subjectivity in professional nursing image is shown in their opinions, beliefs, values, and attitudes of professional nursing and it helps to understand individual's behavior. This study was initiated to find the characteristics and patterns in subjectivity of hospital nurses' professional nursing image. The Data were collected from Apr. 20 to Aug. 22, 1996. The research method employed Q-methodology which is based on self-psychology and abductive logics. Analysis of Q-type obtained by QUANL pc program. The characteristics of professional nursing image was analyzed based on the typal array, extreme comments, and the subject's demographic information. The results revealed that there are three different types on the professional nursing image. The three types were named as follows : The first type, the Improvable, consisting of 6 subjects, preferentially perceived nursing is human behavior as life process, coordinating with other health personnel for the patients as nurses' important role. On the other hand, they are taking a little dissatisfied view of professional nursing image, which can be estimated to advance for the construction of the professional nursing image. The second type, the Self-conflicted, consisting of 13 subjects, who have the subjectivity of the image by focusing on external and environmental factors rather than developing positive individual nurses' image for their profession. They have very conflic-ting and self-degrading traits. The third type, the Affirmative, consisting of 10 subjects, who appreciate the essence of nursing, and that they highly perceived nurse' positive attitude, devotion, mature interrelationship and self-developing efforts etc. In conclusion, this study discovers three types on the professional nursing image and their relationship. By identifying the nature of three types, this study suggests that the results should be useful reinforcement tool in educating nursing students as well as in continuing education for hospital nurses.

• Journal of the Korean Institute of Intelligent Systems
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• v.15 no.1
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• pp.1-5
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• 2005

The purpose of reinforcement learning is to maximize rewards from environment, and reinforcement learning agents learn by interacting with external environment through trial and error. Q-Learning, a representative reinforcement learning algorithm, is a type of TD-learning that exploits difference in suitability according to the change of time in learning. The method obtains the optimal policy through repeated experience of evaluation of all state-action pairs in the state space. This study chose n-Queen problem as an example, to which we apply reinforcement learning, and used Q-Learning as a problem solving algorithm. This study compared the proposed method using reinforcement learning with existing methods for solving n-Queen problem and found that the proposed method improves the convergence rate to the optimal solution by reducing the number of state transitions to reach the goal.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.444-444
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• 2011

Recently, patterned magnetic films and elements attract a wide interest due to their technological potentials in ultrahigh-density magnetic recording and spintronic devices. Among those patterned magnetic structures, magnetic anti-dot patterning induces a strong shape anisotropy in the film, which can control the magnetic properties such as coercivity, permeability, magnetization reversal process, and magneto-resistance. While majority of the previous works have been concentrated on anti-dot arrays with a single magnetic layer, there has been little work on multilayered anti-dot arrays. In this work, we report on study of the magnetic properties of bilayered anti-dot system consisting of upper perforated Co layer of 40 nm and lower continuous Ni layer of 5 nm thick, fabricated by photolithography and wet-etching processes. The magnetic hysteresis (M-H) loops were measured with a superconducting-quantum-interference-device (SQUID) magnetometer (Quantum Design: MPMS). For comparison, investigations on continuous Co thin film and single-layer Co anti-dot arrays were also performed. The magnetic-domain configuration has been measured by using a magnetic force microscope (PSIA: XE-100) equipped with magnetic tips (Nanosensors). An external electromagnet was employed while obtaining the MFM images. The MFM images revealed well-defined periodic domain networks which arise owing to the anisotropies such as magnetic uniaxial anisotropy, configurational anisotropy, etc. The inclusion of holes in a uniform magnetic film and the insertion of a uniform thin Ni layer, drastically affected the coercivity as compared with single Co anti-dot array, without severely affecting the saturation magnetization ($M_s$). The observed changes in the magnetic properties are closely related to the patterning that hinders the domain-wall motion as well as to the magneto-anisotropic bilayer structure.

• Proceedings of KOSOMES biannual meeting
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• 2003.11a
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• pp.123-126
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• 2003

In the present paper, the analysis is on the safe navigation between ships moving each other in restricted waterways under the external force, such as wind or current The numerical simulation of manoeuvring motion was carried out to propose an appropriate safe speed and distance between ships, which is required to avoid marine disasters from the viewpoint of marine safety. From the inspection q this investigation, it indicates the following result In case of proximal navigation between ships under the wind and current, the low-speed vessel is potentially hazardous because the rudder force if low-speed vessel needed for steady-state course-keeping is not sufficient, compared to the high-speed vessel The manoeuvring characteristic based on this investigation will be very useful for keeping the safety of navigation from the practical point of ships design and traffic control in restricted waterways.

• Proceedings of the KIEE Conference
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• 1998.11c
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• pp.953-955
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• 1998

In this paper, a double cylindrical type ozonizer has been designed and manufactured to improve ozone yield by cooling external electrode. The ozonizer equipped with three electrodes( central, internal and external electrodes ) and two gaps. Discharge and ozone characteristics are described in this paper by varying flux( Q ) of oxygen supplied gas, temperature of cooling gas and supplied voltage.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.705-707
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• 2004

In this paper, we propose a robust control technique against parameter uncertainties as well as external disturbances. It is robust control scheme using discrete-time state space disturbance observer. It does not require disturbance modeling, plant inverse modeling and/or Q filter. In frequency domain, its performance is evaluated in terms of sensitivity and complementary sensitivity as well as gain and phase margin. Finally we discuss design criterion of state space disturbance observer considering its performance in frequency domain.