• International journal of advanced smart convergence
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• v.9 no.2
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• pp.49-57
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• 2020

We have not identified on what gender difference during gait at a pace of one's preferred velocity effects on the function of bilateral lower limb. This study was undertaken to investigate a difference of gait strategy by gender during gait at a one's preferred velocity of participants of adult male and female (n=20). Cinematographic data for motion analysis, ground reaction force (GRF) variables, and muscle volume of lower limb were analyzed. Significant difference of variables on movement of center of mass whole body, joint angle and moment of lower limb, and ground reaction force were tested by 2-way ANOVA analysis (P<0.05). Male group showed more muscle volume than female, and both showed more volume in dominant leg than non-dominant. Main effect by bilateral leg during gait showed higher difference in right than left leg in change of vertical position of center of mass (maximal, minimal). Main effect by gender in vertical change of position and velocity of center of mass showed higher difference in male than female (maximal, minimal). Hip joint showed more flexed and extended angle in male than female, and also dorsiflexion of ankle and flexion moment of knee and hip joint showed higher in male than female group. Therefore, this result was assumed that dominant showed furthermore more contribution for propulsive function than non-dominant leg. Gender difference showed in strategy controlling of biomechanical characteristics, and perhaps influenced by muscle volume.

• Korean Journal of Child Studies
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• v.25 no.5
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• pp.111-128
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• 2004

Responsiveness and initiative between infant and mother from toy centered play situation at 6, 7 months of age and infant's social communication skills at 12 months were studied in a sample of 62 infant-mother pairs. Through the video analysis, infants were grouped into simple react group, cooperated group, and active initiative group. In the between groups, we analyzed whether mother's initiative act styles and response styles were different, and whether their social communication skills were different when they tested at 12 months. The results showed that mother's initiative styles were not different but mother's response styles were significantly different with infant groups. Further result showed that cooperated group gained higher score than active initiative group in the total score of Eary Social Communication Skills scales at 12 months of age. The results suggested that mother's responsive behaviors were more important than initiative behaviors for the infant's positive interaction, and the difference of these behaviors would lead to a gap of early social communication abilities.

• Korean Journal of Child Studies
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• v.35 no.5
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• pp.113-134
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• 2014

This study sought to develop a 'Meaning of Parenting Scale for Mothers(MPS-M)' in order to measure how Korean mothers perceive the meaning of parenting. To this end, in Study I, a preliminary scale was designed, based firstly on socio-cultural and evolutionary psychological perspectives and secondly on the responses from 118 mothers concerning meaning of parenting. This was followed up by the collection of 887 mothers' responses to the preliminary scale, which then underwent exploratory factor analysis for scale revision. In Study 2, confirmatory factor analysis was conducted on a collection of responses from 548 mothers using the revised scale. Concurrent validity was tested using a parenting stress scale, and reliability was then checked by conducting calculations for internal consistency. As a result, the MPS-M was finally developed, consisting of 25 items under six factors: 'Internal Maturity', 'Restoration of Naturality', 'Familial Union', 'Physical Burden', 'Affective Disorientation', and 'Comprehensive Loss'. Accordingly, the meaning of parenting was statistically confirmed as a hierarchical two-sided concept possessing six factors under positive and negative meaning categories.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.20 no.4
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• pp.345-358
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• 2013

Purpose: The purpose of this study was to develop a protocol that would help prevent accidents, apply physical restraints properly, and reduce the use of physical restraints in nursing homes. Method: A review of the literature and analysis of existing statutes and regulations were used to develop the preliminary protocol. To test the validity of this preliminary protocol, ten experts were selected from academia and clinical practice to review the protocol. The initial protocol was finalized after it had been reviewed by experts and tested for clinical validity in five different nursing homes. Result: The protocol consists of objectives, definitions and accident probability assessment, principle of using physical restraints, monitoring and documentation of physical restraints. Conclusion: The findings of this study can be used as guidelines to focus on preventing accidents arising out of use of physical restraints, assessing the probability of accidents, and reducing the use of physical restraints through preventive interventions. This will be helpful to prevent ethical, physical, or psychological problems arising from use of physical restraints and to protect the rights of elderly people in nursing homes.

• Journal of the Korean Ceramic Society
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• v.27 no.4
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• pp.529-535
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• 1990

This paper describes the factors which control the impedance-relative humidity characteristics of the TiO2-V2O5 humidity sensor. To obtain the quantitative relationships between impedance and many manufacturing parameters such as V2O5mol%, the sintering time and temperature, various sets of samples are preared and tested. With changing relative hymidity from 20% to 80%, it is measrued that the corresponding capacitance and impedance from the semicircles which complex impedance plots make. As a result we found that the impedance-relative humidity characteristics are mainly controlled by the doping amount of V2O5 total pore volume and bulk resistence of the elements. We can assume the equivalent circuits of each samples and finally control the sintering time to get a linear humidity impedance response curve which plays an important role in device making. 4mol% V2O5-TiO2 specimen sintered at 90$0^{\circ}C$ for 10min. show liear log(Z) vs. RH characteristics and 10mol% V2O5-TiO2 specimen sintered at the same temp. for 20min. show linear (Z) vs. RH.

• Journal of the Korean Ceramic Society
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• v.47 no.4
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• pp.276-282
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• 2010

There are the impregnating layer formation by surface protective materials or impregnants and the adhesion method by polymer, FRP sheet or steel plate in the surface protective method of concrete structure. The surface impregnation method by impregnants improves the durability of concrete structure by modifying the structure of the concrete surface and also have a merit that can be shortly applied in place without the decrease of concrete surface appearance and is easily applied again. This study is interested in manufacturing the concrete surface impregnants including lithium and potassium silicate for the repair of the exposed concrete and the color concrete requiring the advanced function in view of the concrete appearance. The durability and porosity properties was tested for the review of application. The result of this study show that the effective content of silicate ranges 5 to 20% and the separate application of the first impregnant and the second impregnant is effective for the optimum performance. The adhesion in tension is slightly increased but the reinforcement of concrete substrate is slight. So, the concrete impregnant of this study is more desirable for the improvement of durability rather than the reinforcement.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.6
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• pp.1-8
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• 1998

In this paper, we designed a low power 8bit ELM adder with static CMOS and hybrid logic styles on a chip. The designed 8bit ELM adder with both logic styles was fabricated in a 0.8$\mu\textrm{m}$ single-poly double-metal, LG CMOS process and tested. Hybrid logic style consists of CCPL(Combinative Complementary Pass-transistor Logic), Wang's XOR gate and static CMOS for critical path which determines the speed of ELM adder. As a result of chip test, the ELM adder with hybrid logic style is superior to the one with static CMOS by 9.29% in power consumption, 14.9% in delay time and 22.8% in PDP(Power Delay Product) at 5.0V supply voltage, respectively.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.5
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• pp.37-46
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• 2016

In this paper, we propose the beam-steering system using Rotman lens antenna operating at 2.442GHz which is to replace an expensive phase shifter. The overall system consists of the transmission antennas, Rotman lens and switch box. Setting the initial design conditions, it was designed and fabricated satisfying the requirements. From the result tested in the anechoic chamber, it was found that the beam can be steered using Rotman lens in the anechoic chamber. We also visually checked the beam-steering by turning on the LED of the rectenna showing the real-time beam receiving.

• Transactions on Electrical and Electronic Materials
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• v.9 no.1
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• pp.38-43
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• 2008

Using an arterial pressure-volume (APV) model, we performed an analysis of the conventional blood pressure estimation method using an oscillometric sphygmomanometer with computer simulation. Traditionally, the maximum amplitude algorithm (MAA) has been applied to the oscillation waveforms of the APV model to obtain the mean arterial pressure and the characteristic ratio. The estimation of mean arterial pressure and characteristic ratio was significantly affected by the shape of the blood pressure waveforms and the cutoff frequency of high-pass filter (HPF) circuitry. Experimental errors result from these effects when estimating blood pressure. To determine an algorithm independent of the influence of waveform shapes and parameters of HPF, the volume oscillation of the APV model and the phase shift of the oscillation with fast Fourier transform (FFT) were tested while increasing the cuff pressure from 1 mmHg to 200 mmHg (1 mmHg/s). The phase shift between ranges of volume oscillation was then only observed between the systolic and the diastolic blood pressures. The same results were obtained from simulations performed on two different arterial blood pressure waveforms and one hyperthermia waveform.

• Proceedings of the KIEE Conference
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• 1997.11a
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• pp.612-614
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• 1997

Silicon based micro mirror array is a highly efficient component for use in optical applications such as adaptive optical systems and optical correlators. A micro mirror array designed, fabricated and tested here is consisted of $5{\times}5$ single layer polysilicon, electrostatically driven actuators. In this paper, deflection characteristics and pull-in behavior of the actuators for analog control was studied and particularly, the influence of the residual stress in flexure beams for the restorative force of actuators was considered. The springs are modeled as a residual stress-free spring and a spring with residual stress. In calculation, a mirror with the residual stress-free springs has 30.3N/m spring constant and 31.1V pull-in voltage. On the other hand, a mirror with the stressed springs has 23.6N/m and 27.4V respectively. The experimental result, which is 20.5N/m and 25.5V, shows that the stressed springs ore well modeled.