• 제목/요약/키워드: Mixed Methods

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국 섭취 방법에 따른 음식 섭취량, 나트륨 섭취량 및 포만도의 관계 (The Relationship between Food Intake, Sodium Intake and Satiety Rate and the Methods of Consuming Soup)

  • 장은재;조진남
    • 대한영양사협회학술지
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    • 제15권4호
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    • pp.397-404
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    • 2009
  • In this study, we examined food intake, sodium intake, and satiety rate for different methods of consuming soup. Healthy young women (n=50) participated in this study. The subjects ate cooked rice and soup using a method that they preferred and then they were assigned into separate intake groups based on how they consumed their rice and soup. One group consisted of women that ate their soup and cooked rice separately (separate intake group, n=30). The second group consisted of the women who mixed the rice and the soup prior to consumption (mixed intake group, n=20). The mixed intake group consumed significantly more food (p<0.001) and sodium (p<0.05) than the separate intake group. Because of the high water content and ease of swallowing for the mixed intake method, the eating rate of the mixed intake group (42.5 g/min) was significantly higher than that of the separate intake group (28.8 g/min) (p<0.01). However, despite consuming 79.5 g more food at lunch, the rates of satiety were not significantly different before and after eating between the mixed intake and separate intake group. Therefore, eating rate, consumption norms and concept of "clean one's bowl" may influence food intake and sodium intake. Although more studies are needed, these data suggest eating cooked rice and soup separately may help to control obesity and hypertension.

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산모 집중치료실에 입원한 고위험 임부의 건강관리 요구: 혼합적 연구방법 적용 (Health-care Needs of High-risk Pregnant Women Hospitalized in Maternal-Fetal Intensive Care Units: A Mixed-methods Design)

  • 김현진;박호란
    • 여성건강간호학회지
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    • 제24권2호
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    • pp.196-208
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    • 2018
  • Purpose: To identify the characteristics and health-care needs of high-risk pregnant women in maternal-fetal intensive care units (MFICU). Methods: A mixed-methods design was adopted. Data were collected from 78 high-risk pregnant women admitted to the MFICU. Qualitative data included ten participants' experiences with hospitalization and childbirth, which were analyzed using mixed content analysis. Quantitative data were analyzed using at-test and one-way ANOVA testing. Results: The average score for pregnancy and childbirth health-care needs was 3.54 points. Average score by area was before-admission health care (3.70), health care of baby (3.67), health of childbirth (3.61), postpartum health (3.51), and pregnancy health care during hospitalization (3.48). Qualitative results showed diverse feelings and experiences of high-risk pregnant women and their need for health care, which was expressed in three themes and 11 sub-themes. Conclusion: Nurses should recognize high-risk mothers' feelings and needs for pregnancy and childbirth-focused health care to help patients accept their vulnerability and cope positively.

Investigation of the Different Control Approaches for a Remote Sensing Satellite Attitude Control

  • Won, Chang-Hee;Lee, Jeong-Sook
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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    • pp.35-40
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    • 1998
  • A nonlinear attitude model of a satellite with thrusters, magnetic torquers and a reaction wheel cluster is developed. Then the linearized version of this satellite attitude model is derived far the attitude hold mode. For comparison purpose, various control methods are considered for attitude control of a satellite. We consider a proportional derivative controller which is actually used in the remote sensing satellite, KOMPSAT. Then a comparison is made with an H$_2$controller, an H$\sub$$\infty$/ controller, and a mixed H$_2$/ H$\sub$$\infty$/ controller. The analysis and numerical studies show that the proportional derivative controller's performance is limited in the sense that the pitch angle cannot approach zero. The simulations also show that among three control methods (H$_2$control, H$\sub$$\infty$/ control, and mixed H$_2$/ H$\sub$$\infty$/ control) H$_2$control has the fastest response time, H$\sub$$\infty$/ control has the slowest and mixed H$_2$/ H$\sub$$\infty$/ control comes in between the first two control methods. On the other hand, H$\sub$$\infty$/ control used least amount of control effort while H$_2$control required the most.

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복합잡음 환경에서 에지 검출에 관한 알고리즘에 관한 연구 (A Study on Algorithm of Edge Detection in Mixed Noise Environments)

  • 이창영;김남호
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2014년도 춘계학술대회
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    • pp.100-103
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    • 2014
  • 현재 에지 검출은 여러 분야에서 사용되고 있으며, 대부분의 영상처리의 전처리 과정 및 영상처리에 있어서 필수불가결한 기술이다. 이에 따라 관련 연구가 끊임없이 진행되어 오고 있다. 이러한 에지는 영상의 물체에 대한 크기, 방향, 위치 등의 중요한 영상 요소를 가지고 있다. 이를 검출하기 위한 여러 방법들이 제안되어 왔으며, 그 중 대표적인 방법은 Sobel, Prewitt, Roberts, Laplacian, LoG(Laplacian of Gaussian) 등이 있다. 그러나 이러한 기존의 방법들은 복합잡음이 첨가된 영상에서 에지 검출 특성이 미흡하다. 따라서 본 연구에서는 국부 마스크의 크기와 위치에 따라 요소에 대한 중앙값 및 평균값을 이용한 에지 검출 방법을 제안하였다.

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콘텐츠 창작자들의 NFT 시장 참여에 대한 긍·부정 요인 연구: 혼합적 방법론을 적용하여 (Exploring Factors that Affect Content Creators' Participation in the NFT Market: Applying Mixed-methods Approach)

  • 양지훈;윤상혁
    • 한국IT서비스학회지
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    • 제21권4호
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    • pp.105-122
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    • 2022
  • NFTs, which guarantee ownership of digital files using blockchain technology, are the new field for the content industry. The NFT provided new opportunities for content creators to trade digital contents without going through mediation freely. Additionally, collectors and investors can safely and easily own their works without the threat of illegal copies. However, since only a limited number of content creators are participating in the NFT market, there needs to be an influx of various content creators and a process of popularization for this market to grow and develop into the main stage. Furthermore, research on NFT has been limited, and understanding the drivers of creators choosing to participate in NFT is insufficient. Thus, this study aims to identify the factors affecting content creators participating in NFT by applying a mixed-methods approach and presenting practical implications. Using topic modeling and in-depth interviews, this study derives the positive and negative factors and suggests strategies to activate content creators' participation in the NFT market. Through this, we can guide that management implication to reduce the risks and costs of participating in NFTs is needed to encourage the participation of creators. It will also provide insight into ways to develop the NFT content market.

취반방법에 따른 혼합잡곡밥의 품질 및 이화학 특성 (Quality and Physicochemical Characteristics of Rice Cooked along with Various Mixed Grains and by Following Different Cooking Methods)

  • 김현주;이지혜;이병원;이유영;이병규;전용희;고지연;우관식
    • 한국식품영양학회지
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    • 제31권5호
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    • pp.653-667
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    • 2018
  • This study evaluated the quality characteristics, the presence of polyphenolic compounds, and radical scavenging activity of rice cooked along with various mixed grains (barley, black soybean, adzuki beans, foxtail millet, proso millet, sorghum, glutinous rice) by following two different cooking methods (normal and pressure cooker). The amylogram and water characteristics of mixed grains showed significant differences based on the presence of different types of mixed grains. The chromaticity, palatability characteristics, presence of phenol compounds, and radical scavenging activity of rice cooked along with different mixed grains showed significant differences according to the nature of mixed grains. Total polyphenol contents of before cooking, cooked-rice added to mixed grains cooked in the normal cooker and a pressure cooker were 4.46~5.16, 0.58~0.93 and 0.65~0.96 mg GAE/g, and total flavonoid contents were 250.74~548.89, 129.26~207.04 and $127.41{\sim}218.15{\mu}g\;CE/g$, respectively. The DPPH radical scavenging activity of before cooking, cooked-rice added to mixed grains cooked in the normal cooker and a pressure cooker was 79.25~181.61, 22.07~53.64 and 7.51~39.97 mg TE/100 g, and ABTS radical scavenging activity was 203.25~328.24, 47.28~84.94 and 58.27~99.51 mg TE/100 g, respectively. Accordingly, it is necessary to different combinations of mixed grains according to the cooking method at home and grain industry.

Waterjet 선박추진용 사류펌프의 설계 및 성능해석 (Design and Performance Analysis of Mixed-Flow Pump: for Waterjet Marine Propulsion)

  • 황순찬;윤의수;오형우;최범석;박무룡;안종우
    • 유체기계공업학회:학술대회논문집
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    • 유체기계공업학회 2002년도 유체기계 연구개발 발표회 논문집
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    • pp.47-53
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    • 2002
  • The hydraulic design optimization and performance analysis of mixed-flow pumps for waterjet marine vehicle propulsion has been carried out using mean streamline analysis and three-dimensional computational fluid dynamics (CFD) code. In the present study the conceptual design optimization has been formulated with a non-linear objective function to minimize the fluid dynamic losses and then the commercial CFD code was incorporated to allow for detailed flow dynamic phenomena in the pump system. New designed mixed-flow model pump has been tested in the laboratory. Predicted performance curves by the CFD code agree very well with experimental data for a newly designed mixed-flow pump over the normal operating conditions. The design and prediction methods presented herein can be used efficiently as a unified hydraulic design process of mixed-flow pumps for waterjet marine vehicle propulsion.

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한방보험제제의 사상의학적 분류 및 운용 (Herbal Extracts Classification and Application in Terms of Sasang Constitution)

  • 유준상;홍선기;최은주
    • 사상체질의학회지
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    • 제22권4호
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    • pp.40-48
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    • 2010
  • 1. Objectives Herbal Extracts are used in Korean Oriental Medicine clinics. The sixty eight kinds of single herbal extracts and fifty six kinds of mixed herbal extracts has been using since the first year of execution of Korean medicine national insurance policy in 1987. This paper was performed to make a guideline of using herbal extracts. Single herbal extracts and mixed herbal extracts were discussed and classified according to Sasang constition. 2. Methods The sixty eight single herbal extracts were classified into four categories according to Sasang Constitution and fifty six mixed herbal extracts were classified by six Korean oriental medical doctors. Mixed herbal extracts were considered in terms of drug roles[sovereign, minister, assistant and courier(君臣佐使)] or most included ingredient herb. 3. Results Sasang constitutions which were suitable for fifty six mixed herbal extracts were Soeumin(46.4%), mixed constitution(39.2%) and Soyangin(8.9%), Taeeumin(5.3%). Sasang constitutions which were suitable for sixty eight single herbal extracts were Soeumin(47.1%), Soyangin(32.4%) and Taeeumin(20.6%). 4. Conclusions The rate of Soeumin herbal extracts was the most highest among all constitutions. It is regarded that warming and enforcing herb medicine were most used in all prescriptions.

복합잡음 환경에서 변형된 공간 가중치 필터에 관한 연구 (A Study on Modified Spatial Weighted Filter in Mixed Noise Environments)

  • 권세익;김남호
    • 한국정보통신학회논문지
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    • 제19권1호
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    • pp.237-243
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    • 2015
  • 최근, 영상처리는 디지털 시대의 급속 발전과 함께 연구가 활발히 진행되고 있다. 그러나 영상 데이터를 처리, 전송, 저장하는 과정에서 여러 외부 원인에 의해 영상의 열화가 발생되며, 영상 열화의 주된 원인은 잡음에 의한 것으로 알려져 있다. 잡음을 제거하는 대표적인 방법은 CWMF(center weighted median filter), A-TMF(alpha-trimmed mean filter), AWMF(adaptive weighted median filter) 등이 있으며, 이러한 방법들은 복합잡음 환경에서의 잡음제거 특성이 다소 미흡하다. 따라서 본 논문에서는 복합잡음을 제거하기 위하여 잡음 판단을 거친 후, 마스크의 메디안 값 및 공간 가중치를 적용하여 처리하는 영상복원 필터 알고리즘을 제안하였다. 그리고 객관적 판단을 위해 기존의 방법들과 비교하였으며, 판단의 기준으로 PSNR(peak signal to noise ratio)을 사용하였다.

Transient response of vibration systems with viscous-hysteretic mixed damping using Hilbert transform and effective eigenvalues

  • Bae, S.H.;Jeong, W.B.;Cho, J.R.;Lee, J.H.
    • Smart Structures and Systems
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    • 제20권3호
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    • pp.263-272
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    • 2017
  • This paper presents the time response of a mixed vibration system with the viscous damping and the hysteretic damping. There are two ways to derive the time response of such a vibration system. One is an analytical method, using the contour integral of complex functions to compute the inverse Fourier transforms. The other is an approximate method in which the analytic functions derived by Hilbert transform are expressed in the state space representation, and only the effective eigenvalues are used to efficiently compute the transient response. The unit impulse responses of the two methods are compared and the change in the damping properties which depend on the viscous and hysteretic damping values is investigated. The results showed that the damping properties of a mixed damping vibration system do not present themselves as a linear combination of damping properties.