• The Korean Journal of Pain
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• v.11 no.1
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• pp.105-108
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• 1998

Backgrounds: Cervical epidural nerve block is useful in the management of a variety of acute, chronic and cancer related pain syndromes involving the head, face, neck and upper extrimity. To safely perfom the cervical epidural block, an appreciation of the expected distance from skin to epidural space is important. We studied the distance from skin to cervical epidural space of adults to determine if any relationship exists between patient height, weight and neck circumference and the distance from skin to epidural space. Methods: Patients 170, suffering from neck and upper extremity pain with cervical HIVD(herniated intervertebral dics) were selected. Cervical epidural block was performed at $C_{6\sim7}$ or $C_{7-}T_1$ intervertebral space. Then measured the distance from skin to epidural space and analysed the relationship between age, height, weight and neck circumference and the distance from skin to epidural space. Results: The cervical epidural depth of male $C_{6\sim7}$, male $C_{7-}T_1$, female $C_{6\sim7}$ and female $C_{7-}T_1$ groups were $5.17{\pm}0.63$, $5.47{\pm}0.59$, $4.84{\pm}0.56$ and $5.01{\pm}0.60$ cm respectively. Cervical epidural depth significantly correlated with body weight, ponderal index and neck circumference. Conclusions: The distance from skin to cervical epidural space has significant relationships with weight, ponderal index and neck circumference. Although experience is important, patient's weight and neck circumference are indicating factor, of the cervical epidural depth.

• Science of Emotion and Sensibility
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• v.22 no.4
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• pp.3-14
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• 2019

The café has become an important representative "third place" where people study and rest. Hence, it is worthwhile for researchers to understand the needs of individual users as well as the requirements of people who visit such venues in groups. The identification of strategies that can help achieve larger, wider, higher, or deeper interior spaces in small and compact locations can generate benefits for both users and designers. In this study, where 56 interior design students participated, we used an eye-tracker and images of cafes to explore the relationships between spatial depth and the intention to visit a cafe space. The researchers digitally developed fifteen different conditions of space and measured the eye movements of the participants using an eye-tracker when they examined images that appeared to convey the most depth. Participants were also asked to imagine the proposed space images as cafes and to select one of the 15 images as the location that they would be most likely to visit individually and one that they would frequent in the company of other people. The research results revealed that certain ways of using interior design elements altered the participants' perceptions of spatial depth without any change being effected to the actual volume or the size of the space. The participants tended to perceive a space with a small decorative artwork on a dark toned wall with unconnected furniture as deeper than a space with no or large artwork on a light toned wall with contiguous furniture. Spatial depth was a more important consideration for an individual visit than for a group visit. The results of this exploratory study will help scholarly understanding of the role played by spatial depth in customer intentions to visit a cafe.

• Magazine of korean Tunnelling and Underground Space Association
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• v.4 no.4
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• pp.86-94
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• 2002

• The Journal of Sustainable Design and Educational Environment Research
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• v.11 no.2
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• pp.1-8
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• 2012

Due to the fact that there are low birth rate and longer life longevity, schools have been shutting down and converted into welfare facilities. However, most of researches about utilizing closed down school are focused on case researches or architectural planning and design. Moreover, majority of existing welfare centers for the aged are not designed with the flow of human traffic in mind, which means there is no consideration of physical or psychological characteristics of elderly people. That fact leads to increasing number of shutting down welfare facilities. Therefore, this thesis will present the necessity of effective space allocation, extension and reconstruction for residents in aged care by analyzing space using index of space syntax with depth-map software.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2020.07a
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• pp.286-287
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• 2020

Depth map is the most common way of expressing 3D space in immersive media. In this paper, we propose a post-processing method to improve the quality of depth map. In proposed method, a depth map is divided into segments, and the plane of each segment estimated using RANSAC. In order to increase the accuracy of the RANSAC process, we apply matching reliability of each pixel in depth map as a weighting factor.

• The Korean Journal of Pain
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• v.12 no.1
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• pp.114-118
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• 1999

Backgrouds: Cervical epidural blocks were used as part of a comprehensive multimodal treatment program for patients with chronic pain in the head, neck and upper extremities. The depth of the epidural space beneth the skin surface varies at different levels of the spinal column in the same patient. It also varies from patient to patient at the same vertebral level. We studied the distance the skin to the cervical epidural space in adults patients at different intervertebral spaces. Methods: Date were gathered from 628 patients having cervical epidural block for relief of cervical and upper extrimity pain. All blocks were performed using hanging drop method after loss of resistance with saline at C5-6, C6-7, C7-T1 intervertebral space. Results: Mean distances for skin to cervical epidural space (DSES) were 5.42 cm, 5.06 cm, 4.68 cm in male, 5.00 cm, 4.61 cm, 4.10 cm in female at C7-T1, C6-7, C5-6 intervertebral space. DSES correlated with body weight, neck circumference and body mass index significantly. Conclusion: In the cervical spine, DSES varies from space to space. The longest DSES were noted at C7-T1 level in male, and the shortest DSES were at C5-6 in female. DSES has significant relationships with weight, neck circumference and body mass index.

• Journal of the Korean Society of Safety
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• v.30 no.6
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• pp.63-69
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• 2015

In this study, a 2D hydrodynamic model equipped with critical dry depth scheme was developed to reproduce the flow over staircase. The channel geometry of hydraulic experiment conducted by Ishigaki et al. was generated in the computational space, and the developed model was validated against flow properties such as discharge, velocity and momentum. In addition, the water surface profile and the velocity distribution evolved in flow over two layers staircases were analyzed. When the initial water depth at the upper floor was 0.3 m, the maximum velocity at lower floor was 4.2 m/s, and the maximum momentum was $1.2m^3/s^2$, and its conversion to force per unit width was 1.2 kN/m. This value was equivalent to the hydrostatic force with 50 cm water depth, and evacuation became difficult, as proposed by Ishigaki et al. For the flow over staircases connecting two layers, the maximum run-up height in flat part connecting two layers was approximately two times higher than the initial water depth in upper floor, and the rapid shock wave with sharp front and long tail was propagated.

• Korean Institute of Interior Design Journal
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• v.15 no.5 s.58
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• pp.120-129
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• 2006

Apartments have become the most popular type of residential building in Korea since the 1960s. The dwelling space should be designed to accomodate various life styles or changing needs of family members. This research is conducted to analyze flexible interior space types of apartments and to improve the architectural planning and design of apartments that can satisfy various needs of residents. In this study, apartments of 10 - 90 pyeongs built in the region of Seoul, between 1998 and 2007, are investigated in terms of the unit plan, the number of open sides, and a distribution of flexible apartment types for each year, Apartments with flexible space are classified into 10 different types, including a flexible type between bedrooms, a flexible type between a bedroom and the livingroom, and a flexible type between the dinning room and the livingroom. According to the composition of unit plans, apartments are also differentiated as a single-corridor type, a double-corridor type, a stairway type, a hall type, and a combination type. According to these classifications, the characteristics of desirable unit plans were analyzed. The results of the analysis showed that, as the unit size of apartments get bigger, the ratio of width/depth of the front side unit plan is increased. This result reflects a trend of high-rise apartments which have an increased number of front-side bays and a shorter depth for better penetration of daylight. In addition, a hall type is found to have a wider front side and shorter depth. According to open sides, a flexible type of the livingroom and the dinning room/kitchen (L-D.K) is found to be most common for the front/back open space, and the livingroom is usually placed on the front/side open space. To meet the changing needs of residents, more research should be conducted on flexible dwelling space.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.12
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• pp.2525-2532
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• 2009

In this paper, a fast sphere decoder is proposed for the joint detection of phase-shift keying (PSK) signals in uncoded Vertical Bell Laboratories Layered Space Time (V-BLAST) systems. The proposed decoder, PSD, consists of preprocessing stage and search stage. The search stage of PSD relies on the depth-first branch-and-bound (BB) algorithm with "best-first" orders stored in lookup tables. Simulation results show that the PSD is able to provide the system with the maximum likelihood (ML) performance at low complexity.

• Journal of Astronomy and Space Sciences
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• v.11 no.1
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• pp.1-12
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• 1994

The structure of the magnetic funnel element in the intermediate polar is considered in terms of an important site for the X-ray absorption and the reemission of the X-ray as the optical light. In this paper the column density and the optical depth vary with the filling factor, which is introduced to characterize the structure of matter in the magnetic funnel element. The results of the energy dependence of the X-ray spectrum and the modulation depth of the X-ray light curve are discussed.