• 제목/요약/키워드: pattern of spread

검색결과 324건 처리시간 0.025초

3차원 형상 분석을 통한 브래지어 하컵 패턴의 원리 분석 (Development of the Fundamental Methodology of Lower Cup Pattern depending on 3D Shape Analysis of Breast)

  • 이옥경;홍경희;이예진
    • 한국의류학회지
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    • 제45권1호
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    • pp.94-105
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    • 2021
  • This study analyzes the shape change of the breast according to the replica combination method of the lower cup and suggest a pattern construction for the end use purpose. To provide appropriate brassiere patterns to each individual who has various 3D shape characteristics, the ways of layout of 3D replicas were investigated as well as evaluated subjectively and objectively. As for experimental brassieres, basic replicas from the mold cup of long-run brassiere were combined into five different ways to find the appropriate lower brassiere cup pattern. Eighteen women wore experimental brassieres and their breasts were analyzed using the Geomagic Design X program (3D System, Inc., Korea). As result, the pattern that matched the vertexes of the four pieces of the replica and naturally spread the bottom part was best for raising and pushing toward the inside breasts. The fit was good in the case of a pattern in which the convex portions overlapped both sides of the four replica pieces where the vertexes and the bottom part naturally spread apart. The subjects were able to differentiate comfortably fitted brassieres and highly functional brassieres.

토끼에서 경막외강으로 투여한 조영제의 분포양상 (Spreading Pattern of Epidurally-Administered Contrast Media in Rabbits)

  • 이상철
    • The Korean Journal of Pain
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    • 제10권2호
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    • pp.231-234
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    • 1997
  • Background: The aim of this study was to examine the precise spreading pattern of contrast media in small increments in rabbits. Following pentobarbital anesthesia, the epidural puncture was done surgically with a blunt hook. Methods: The tip of epidural catheter was located at the mid-portion of T7 and T12, in the T7 group (n=7) and T12 group (n=8), respectively. Injection of the contrast media was started at 0.1 mL/kg and increased by 0.1 mL/kg up to a maximum of 0.6, mL/kg, under fluoroscopy. Results: In both groups, the extent of spread increased continuously as a Starling resistor with increasing injected volume(T7 group: $y=4.0+41.8x-28.1x^2$, T12 group: $y=0.2+57.7x-43.5x^2$) the total spread of contrast media was similar. The contrast media spread equally, both rostral and caudal, from catheter tip in T7 group; media spread approximately twice as far rostral as compared to caudal in T12 group (P<0.05). Conclusions: In rabbits, the position of epidural catheter tip should be positioned 2~3 segments below the aimed segment in lower thoracic or lumbar region, whereas in mid-thoracic region it should be positioned close to the level of aimed segment. Rabbits have relatively small epidural space therefore, the volume of injectant should be carefully determined with the suggested equations of this study.

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겨울철 심야기기 사용에 따른 부하사용패턴 추정 (Estimation of Load Pattern due to Midnight Power Equipment)

  • 김창수;이창호;진병문;백영식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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    • pp.48-50
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    • 2001
  • Recently, electric heating using midnight power has brought a rapid increase. due to a rise of oil price and a low tariff of midnight power. Therefore, the increase of midnight power use has much influenced on midnight load pattern. This paper estimates the load pattern due to midnight power equipments, analyzes the influence of the spread of midnight power equipments on midnight load and suggests reasonable spread level of equipments.

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Inhalation Configuration Detection for COVID-19 Patient Secluded Observing using Wearable IoTs Platform

  • Sulaiman Sulmi Almutairi;Rehmat Ullah;Qazi Zia Ullah;Habib Shah
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제18권6호
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    • pp.1478-1499
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    • 2024
  • Coronavirus disease (COVID-19) is an infectious disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus. COVID-19 become an active epidemic disease due to its spread around the globe. The main causes of the spread are through interaction and transmission of the droplets through coughing and sneezing. The spread can be minimized by isolating the susceptible patients. However, it necessitates remote monitoring to check the breathing issues of the patient remotely to minimize the interactions for spread minimization. Thus, in this article, we offer a wearable-IoTs-centered framework for remote monitoring and recognition of the breathing pattern and abnormal breath detection for timely providing the proper oxygen level required. We propose wearable sensors accelerometer and gyroscope-based breathing time-series data acquisition, temporal features extraction, and machine learning algorithms for pattern detection and abnormality identification. The sensors provide the data through Bluetooth and receive it at the server for further processing and recognition. We collect the six breathing patterns from the twenty subjects and each pattern is recorded for about five minutes. We match prediction accuracies of all machine learning models under study (i.e. Random forest, Gradient boosting tree, Decision tree, and K-nearest neighbor. Our results show that normal breathing and Bradypnea are the most correctly recognized breathing patterns. However, in some cases, algorithm recognizes kussmaul well also. Collectively, the classification outcomes of Random Forest and Gradient Boost Trees are better than the other two algorithms.

일차원 액적 배열하에서 화염 퍼짐에 관한 실험적 연구 (An Experimental Study on Flame Spread in an One-Dimensional Droplet Array)

  • 박정;신현동;코바야시 히데아키;니오카 다카시
    • 대한기계학회논문집B
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    • 제23권1호
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    • pp.131-139
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    • 1999
  • Experimental investigations on flame spread in droplet arrays have been conducted under supercritical ambient pressures of fuel droplet. Flame spread rates are measured for n-Decane droplet of diameters of 0.75 and 1.0mm, using high speed images of OH chemiluminescence up to 3.0MPa. The pattern of flame spread is categorized into two: a continuous mode and an intermittent one. There exists a limit droplet spacing, above which flame spread does not occur. Flame spread rate with the decrease of droplet spacing increases and then decreases after takin& a maximum. It is also seen that there exists a limit ambient pressure, above which flame spread does not occur. Flame spread rate decreases monotonically with the increase of ambient pressure. Exceptionally, In the case of a small droplet spacing, flame spread with the increase of ambient pressure is extended to supercritical pressures of fuel droplet. This is caused by enhanced vaporization with the increase of ambient pressure. Consequently, in flame spread with droplet droplet spacing, the relative position of flame to droplet spacing plays an important role. The monotonic decrease with ambient pressure is mainly related to the reduction of flame radius in subcritical pressures and the extension to supercritical pressures of flame spread is caused by the reduction of ignition time of unburnt droplet due to the enhanced vaporization at supercritical pressures.

Non-Destructive Evaluation of Semiconductor Package by Electronic Speckle Pattern Interferometry

  • Kim, Koung-Suk;Kang, Ki-Soo;Jung, Seung-Tack
    • Journal of Mechanical Science and Technology
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    • 제19권3호
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    • pp.820-825
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    • 2005
  • This paper proposes non-destructive ESPI technique to evaluate inside defects of semiconductor package quantitatively. Inspection system consists of ESPI system, thermal loading system and adiabatic chamber. The technique has high feasibility in non-destructive testing of semiconductor and gives solutions to the drawbacks in previous technique, time-consuming and the difficulty of quantitative evaluation. In result, most of defects are classified in delamination, from which it is inferred to the insufficiency of adhesive strength between layers and nonhomogeneous heat spread. The $90\%$ of tested samples have a delamination defect started at the around of the chip which may be related to heat spread design.

MIMO Channel Capacity and Configuration Selection for Switched Parasitic Antennas

  • Pal, Paramvir Kaur;Sherratt, Robert Simon
    • ETRI Journal
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    • 제40권2호
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    • pp.197-206
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    • 2018
  • Multiple-input multiple-output (MIMO) systems offer significant enhancements in terms of their data rate and channel capacity compared to traditional systems. However, correlation degrades the system performance and imposes practical limits on the number of antennas that can be incorporated into portable wireless devices. The use of switched parasitic antennas (SPAs) is a possible solution, especially where it is difficult to obtain sufficient signal decorrelation by conventional means. The covariance matrix represents the correlation present in the propagation channel, and has significant impact on the MIMO channel capacity. The results of this work demonstrate a significant improvement in the MIMO channel capacity by using SPA with the knowledge of the covariance matrix for all pattern configurations. By employing the "water-pouring algorithm" to modify the covariance matrix, the channel capacity is significantly improved compared to traditional systems, which spread transmit power uniformly across all the antennas. A condition number is also proposed as a selection metric to select the optimal pattern configuration for MIMO-SPAs.

인화성액체의 연소 형태에 관한 실험적 연구 (Experimental Studies on the Burning Forms of Flammable Liquids)

  • 최승복;최돈묵
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2010년도 춘계학술대회
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    • pp.247-251
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    • 2010
  • The victims of fire are increasing steadily. Fires have been occurred by arson, spontaneous combustion and various causes. As a result of that, the damages of fire got out of hand. Especially, the fires of flammable liquids are can be spreaded easily because of high calorific value and fire loads. These rapid fire spread cause the huge losses of both life and property and the malfunction of extinguishing systems. In these studies, we examined the spread pattern of surface fire on the water surface by the reappearance experiment.

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J2EE 패턴기반의 컴포넌트 개발 프로세스 (J2EE Pattern Based Component Development Process)

  • 최일우;류성열;이남용
    • 한국전자거래학회지
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    • 제7권3호
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    • pp.219-240
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    • 2002
  • The various software engineering techniques have been appeared in order to cope with the software crisis since 1980's. Currently, the research against the techniques likes the Design pattern, Component which improve the software's re-use are spread out. Also S/W Development Process are interested intensively which attempts the quality and a increasing productivity of software development with the basic policy. The design pattern is the solution against the problem which occurs repeat in a specific area. Many design pattern are developed and researched, but the method which accommodates the developed design pattern efficiently in the phase of analysis and design software development process is not good enough, so it is the actual applying technique is difficult. In this paper we suggest and the “UML components+” which is a efficient component development process from customizing EJB based the J2EE using the “UML Components” which is a component development methodology. Applying J2EE pattern efficiently with UML components+, there is a possibility of efficiency in the component development based pattern.

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롤투롤 그라비어 방식의 인쇄 전극 저항 최소화를 위한 실험계획법 적용 인쇄 공정 조건 최적화 (Optimization of Printing Conditions Using Design Experiments for Minimization of Resistances of Electrodes in Roll-to-roll Gravure Printing Process)

  • 이상윤;김철;김충환
    • 한국생산제조학회지
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    • 제26권4호
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    • pp.351-356
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    • 2017
  • The resistance of printed patterns for electrodes fabricated using printing technology should be minimized. This parameter depends on the pattern width and thickness; however, from the viewpoint of printability, the printed patterns should be printed at the designed width. The resistance of the printed patterns as well as printability is affected by various printing conditions. In this paper, the printing condition is optimized to minimize the resistance of electrodes printed by the roll-to-roll gravure method. This is done by considering the spread ratio of pattern width as a parameter of printability using design experiments. The drying temperature, dryer fan speed, and printing speed are selected as effective factors for the experiment objective. The optimized conditions are obtained and reproducibility test using these demonstrates that the optimized conditions can produce low-resistance electrodes for printability of the pattern width.