• Journal of the Korean Institute of Landscape Architecture
• /
• v.38 no.5
• /
• pp.12-20
• /
• 2010

The purpose of this study is to evaluate human thermal comfort by spatial structure and to explore solutions to improve the thermal environment of a small urban space. The study site was Korea University campus. Thermal conditions were measured to evaluate the quality of the thermal environment in each type of space within the study site. Micrometeorology measurements, analysis of space characteristics for using fish-eye lens photography, and thermal comfort modeling through the use of collected meteorological data, such as temperature and humidity, were performed. Results showed that the level of thermal comfort for humans differs depending on the types of space within the study site. Thermal comfort is better in open spaces than enclosed in the aspect of radiative mean temperature, Predicted Mean Vote(PMV), and Physiologically Equivalent Temperature(PET). This fact is probably due to shadows or buildings or trees that may block solar radiation. Thus, it is necessary to consider the spatial arrangements of buildings and trees to enhance openness and ventilation in the space. Paving materials and exterior building materials should also be selected to lower the radiant temperature. Given these results, a quantitative evaluation on human thermal comfort could propose a way to plan user comfortable small urban spaces. Study methods used and results provided in the study can promote a better way for urban space planning direction to improve environmental quality.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.2
• /
• pp.127-133
• /
• 2021

A recent study of people physically falling focused on analyzing the motions of the falls using a recurrent neural network (RNN) and a deep learning approach to get good results from detecting 2D human poses from a single color image. In this paper, we investigate a detection method for estimating the position of the head and shoulder keypoints and the acceleration of positional change using the skeletal keypoints information extracted using PoseNet from an image obtained with a low-cost 2D RGB camera, increasing the accuracy of judgments about the falls. In particular, we propose a fall detection method based on the characteristics of post-fall posture in the fall motion-analysis method. A public data set was used to extract human skeletal features, and as a result of an experiment to find a feature extraction method that can achieve high classification accuracy, the proposed method showed a 99.8% success rate in detecting falls more effectively than a conventional, primitive skeletal data-use method.

• Proceedings of the KOSOMBE Conference
• /
• v.1991 no.05
• /
• pp.28-30
• /
• 1991

A visual prosthesis for the blind based upon electrical stimulation of the visual cortex requires the development of an array of electrodes. To establish design specifications for such an electrode array, we have conducted psychophysical experiments with normally sighted subjects wearing a portable 'phosphene' simulator. The simulator consists of a small video camera, a monitor masked by an opaque perforated film, and optical lenses. The visual angle subtended by the masked monitor is $1.7^{\circ}$ or less. We measured visual acuity and reading rate as a function of the number of pixels and their spacing. Our results indicate that a phosphene image produced by 600 electrodes implanted in a $1\;cm^2$, area near the foveal projection on the visual cortex should provide a limited but useful visual sense for the profoundly blind.

• 한국벤처창업학회:학술대회논문집
• /
• 2017.04a
• /
• pp.45-45
• /
• 2017

본 연구에서는 고압산소치료 후 포유동물의 피부에서 Melanin 세포의 생성이 줄어들었음을 이미 보고된 바 있고, 치료 후 전층 피부이식 생존율을 높였고, 또한 인체의 피부 진피층 확인은 더 많은 임상데이터가 필요하나 고압산소치료 후 표피면의 변화는 빠른 시간에 확인 할 수 있다고 판단됨으로 이에 피부진단기의 기준면과의 평행(parallel polarization) 이미지로 피부표피의 변화를 확인 하고자 했다. 본 연구의 고압산소챔버를 활용한 피부표피에 대한 분석 및 실험 결과, 주름살 및 상처(Wrinkle & Scar) 분석에서 피실험자 남자1 3%, 남자2 2%, 여자1 5.9%, 여자2 2.3%로 피실험자 모두 감소 현상을 보여 피부 탄력도가 좋아 지는 효과를 보였다. 피부미백(S-Gray) 분석에서는 피실험자의 피부 표피면의 멜라닌 및 에리즈마 색소의 피부 톤이 남자1 1.1%, 남자2 2.3%, 여자1 4% 로 피실험자 4명 중 3명은 상승 효과를 얻었으나, 피실험자 다른 1명인 여자2는 2.3% 하향의 결과가 나타났다. 홍도(Erythema) 분석, 피실험자 정상인 부위인 D.BLUE/BLUE 값이 남자1 5.6%, 남자2 4.9%, 여자1 17.3%, 여자2 15.3% 증가 현상을 보였으며 남자와 여자의 효과 차이가 10% 이상으로 나타낸 것으로 보아 남자 보다는 여자가 우세한 것으로 판단되었으며, 비정상인 에리즈마 색소(민감도)의 비정상인 부위인 YELLOW/RED 컬러 값에서 남자1 5.2%, 남자2 5%, 여자1 9.2%, 여자2 4.5% 감소 하였음을 보였다. 이에 피실험자 모두 에리즈마인 민감성 산소치료에 따른 피부에 미치는 영향이 효과가 있는 것으로 판명되었다.

• Journal of Korea Multimedia Society
• /
• v.19 no.12
• /
• pp.1927-1935
• /
• 2016

This paper propose a framework for human body parts in RGB-D image. We conduct tasks of obtaining person area, finding candidate areas and local detection in order to detect hand, foot and head which have features of long accumulative geodesic distance. A person area is obtained with background subtraction and noise removal by using depth image which is robust to illumination change. Finding candidate areas performs construction of graph model which allows us to measure accumulative geodesic distance for the candidates. Instead of raw depth map, our approach constructs graph model with segmented regions by quadtree structure to improve searching time for the candidates. Local detection uses HOG based SVM for each parts, and head is detected for the first time. To minimize false detections for hand and foot parts, the candidates are classified with upper or lower body using the head position and properties of geodesic distance. Then, detect hand and foot with the local detectors. We evaluate our algorithm with datasets collected Kinect v2 sensor, and our approach shows good performance for head, hand and foot detection.

• Archives of design research
• /
• v.20
• /
• pp.211-217
• /
• 1997

Natural dyes don't pollute the environments in contrast to artifical dyes. The cloths dyed with natural material can be developed into insect-proof clothing and bedding. With natural tint, they can also produce natural images. The purpose of this paper is to show the way to develop the natural dye material easily available at cheap cost, to produce high value added products in terms of dyeing a wide range of colors by using this material, and to suggest the way for farmers to cultivate the onions in their idle land, thus gaining additidnal income. In the process of dyeing natural cloth with onion skin produced largely in Mooan, Chonnam, we were able to extract a wide spectrum of colours from yellow to pale brown and gray. Having reaped good results in the various endurance tests(of washing, friction, water, sweat, sunlight), this material is estimated to be highly worthy of industrialization.

• Journal of the Korean Society of Costume
• /
• v.57 no.1 s.110
• /
• pp.28-38
• /
• 2007

This study is on the image of a woman's body exposure, expressed in various situations or images in the modern fashion. The results of this study can be summarized as the following. First, either the exposure or stress of a woman's specific body parts like breast, waist, hips, or legs which can be sensed totally different from man's or the ironic disclosure of body parts always lapped around emphasizes femininity by giving full play the unique sexual beauty of a woman's body. Second, the desire of disclosure to have others' attention with the concealment as suggestive exposure expresses the eroticism. The modified eroticism is found different from the conventional concept and is based on the desire to make others notice one's existence continually by the sexual exposure dress particularly to entire the other sex, the dismantlement of changing an underwear to an outer-dress, and so forth. Third, both exposure of a woman's sexual body parts and expression of exposure to the utmost by laying a woman's entire body bare can mean sex liberty in the laissez-faire generation. This may suggest a pleasure-oriented way of thinking of the self-consolation rather than showing others, or feature the personality and the liberty endowed women with.

• The Journal of the Korea Contents Association
• /
• v.11 no.10
• /
• pp.209-216
• /
• 2011

This paper, the shielding material is suggested using by the korean paper, lacquer, and charcoal those can be used more eco-friendly materials for the interior design. Also, it is designed the image-wall for improving of the electromagnetic shielding and the beauty. Suggested shielding material is manufactured with the thickness of 2 mm by the printing method of the lacquer and charcoal on the korean paper. This material has the shielding effectiveness over 95% until 2 GHz. The application for the interior design using more eco-friendly material can be reduced the effect of electromagnetic wave and the chemical substances like as the formaldehyde and the volatile organic compound (VOC).

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.40 no.2
• /
• pp.195-201
• /
• 2014

Body fluid has been studied for diverse fields like Ringer's solutions, artificial joint fluids, cell growth culture media because it plays a crucial role in controlling body temperature and acts as a solvent for diverse metabolite processes in the body and delivery media of mineral, energy source, hormone, signal and drug from and to cell via blood or lymphatic vessel by osmotic pressure or active uptake. Stratum corneum containing extracellular lipids and NMF (natural moisturizing factor) absorbs atmospheric water residing outside of cells and utilize it to hydrate inside of their own. This process is related to skin barrier function. In this study, we conducted the cell viability test with Cell Bio Fluid $Sync^{TM}$, which mimicks body fluids including amino acids, peptides, and monosaccharides to strengthen skin barrier, and the clinical skin improvement test with cosmetics containing Cell Bio Fluid $Sync^{TM}$. In the cell viability test, HaCaT cell was treated with PBS for 3 hours, followed by the treatment of a cell culture medium (DMEM) and isotonic solution (PBS) and Cell Bio Fluid $Sync^{TM}$ for 3 hours each. Then, MTT assay and image analysis were conducted. In the clinical skin improvement test, twenty-one healthy women participated. Participants applied cosmetics containing Cell Bio Fluid $Sync^{TM}$ on their face for a week and evaluated the skin hydration, skin roughness, brightness and evenness. All measurements were conducted after they washed off their face and took a rest under the constant temperature ($22{\pm}2^{\circ}C$) and constant humidity conditions ($50{\pm}5%$) for 20 minutes. All the data were analyzed by SPSS (version 21) software program. Results showed that Cell Bio Fluid $Sync^{TM}$ improved both the cell viability and in vivo skin conditions such as skin hydration, roughness, brightness and evenness.

• Journal of the Korean Society of Radiology
• /
• v.11 no.1
• /
• pp.49-54
• /
• 2017

As the Radiofrequency(RF) increases with the magnetic field strength, the wavelength of the RF excitation field becomes smaller, which leads to more the thermal effect in the human-body placed in the electric field. MRI scanner used was GE signa 1.5T, HDx 3.0T and Philips 3.0T with same routine clinical sequence protocol. Therefore temperature was measured before and after each scan. Taken the temperatures in the ear with ear infra-red type thermometer(Braun co). 3.0T were temperature increases more than $0.15^{\circ}C$ and GE 3.0T MRI equipment about $0.14^{\circ}C$ higher than the Philips 3.0T MRI(p<0.012). Psychogenic status was investigated by the survey respondents about their status can not just answer therefore, a little different from the expected. In our study of Thermal effect of clinical MRI with clinical protocol sequence, we found that the 3.0T in the body-temperature rise was greater than the 1.5T. Therefore, in clinical 3.0T examine the dangerous situation caused by the temperature rise occurred (burns, impaired thermoregulatory mechanism in patients with high-temperature damage, exhaustion occurs due to excessive sweating), not to appear the more watched the patient's condition with procedure.