• 대한후두음성언어의학회지
• /
• 제9권1호
• /
• pp.71-78
• /
• 1998

Type Ⅰ thyuroplasty in conjunction with arytenoid adduction is one of the excellent techniques in the treatment of unilateral vocal fold paralysis. But perioperative objective evaluation of the patients is difficult. With the development of the videostroboscopy and image analysis program, we could quantify the Glottal Area Waveform(GAW) in patients with unilateral vocal fold paralysis and investigated the relationship between the glottal area and aerodynamic and acoustic parameters. Eight female patients who were performed type Ⅰ thyroplasty in conjunction with arytenoid adduction and 5 females with normal vocal function were involved in this study. Preoperative and postoperative videostroboscopy and vocal function study wire performed. GAW was analysed quantitatively with image analysis program (Kay Stroboscope Image analysis, KSIP) Peak Glottal Area(PGA), Baseline Offset(BO), and Closing Phase(CP) were increased in patients with unilateral vocal fold paralysis and they were reduced after the operation. Mean flow Rate (MFR) was well correlated with the PGA in normal control group and unilateral vocal fold paralysis patients. Noise to harmonic ratio(NHR) was correlated with PGA only in preoperative unilateral vocal fold paralysis patients. In conclusion quantitative measurement of the GAW is useful method in evaluation of unilateral vocal f31d paralysis patients.

• 치과방사선
• /
• 제16권1호
• /
• pp.81-91
• /
• 1986

The author obtained the trans cranial radiographs of right and left side and the individualized lateral tomograms of right and left side after the analysis of submental vertex view from 8 young adults of 25-32 years with normal occlusion. The condylar position from 32 radiographs of normal TMJs were assessed with each measurement methods. All datas from these analyses were recorded and statistically processed with CYBER computer system. The results were obtained as follows. 1. In each measurement methods, the area measurements using the midpoint fossa and the midpoint condyle revealed the hightest concordance rate between the radiographic pairs. 2. In the subjective evaluation, the qualitative concordance existed in 44% and the full concordance existed in 25%, so it was found that concordance rates were relatively low between the radiographic pairs. 3. In each measurement methods, the area measurement using the midpoint fossa revealed the strongest correlation between the radiographic pairs. 4. The correlations between the area measurement using the midpoint fossa and subjective valuation revealed relatively strong value which is 0.926 in the trans cranial radiographic series and the lowest value which is 0.743 in the tomographic series.

• 한국해양공학회지
• /
• 제36권1호
• /
• pp.50-60
• /
• 2022

The deep ocean engineering basin (DOEB) of the Korea Research Institute of Ship and Ocean Engineering (KRISO) is equipped with an extreme-environment reproduction facility that can analyze the motion characteristics of offshore structures and ships. In recent years, there have been requirements for a wide range of six-degree-of-freedom (6-DOF) motion measurements for performing maneuvering tests and free-running tests of target objects (offshore structures or ships). This study introduces the process of developing a wide-area motion measurement technology by incorporating the auto-tracking technology of the towing carriage system to overcome the existing 6-DOF motion measurement limitation. To realize a wide range of motion measurements, the automatic tracking control system of the towing carriage in the DOEB was designed as a speed control method. To verify the control performance, the characteristics of the towing carriage according to the variation in control gain were analyzed. Finally, a wide range of motions was tested using a model test object (a remotely operated vehicle (ROV)), and the wide-area motion measurement technology was implemented using an automatic tracking control system for a towing carriage.

• 한국산림과학회지
• /
• 제6권1호
• /
• pp.24-26
• /
• 1967

본(本) 시험(試驗)의 결과(結果)로서 다음과 같이 결론(結論) 지을 수 있다. 1. 불규칙(不規則)한 도형(圖形)의 area measurement에는 planimeter method 대신(代身) dot grid method 또는 transects method에 의(依)하여 무방(無妨)하다. 2. dot grid method에 의(依)할 시(時)는 planimeter method인 경우(境遇)보다 과대치(過大値)를 준다. 3. transects method에 의(依)할 시(時)는 planimeter method인 경우(境遇)보다 과소치(過少値)를 준다. 4.면적(面積)이 30ha 보다 작은 polt에 대(對)하여 transects method를 적용(適用)할 시(時)는 큰 error가 있으나 30ha를 넘을 때는 error가 작아진다. 따라서 transects method는 30ha 보다 큰 plot에 적용(適用)하여 좋은 결과(結果)를 준다. 5. 일반(一般)으로 transects method에 의(依)한 area measurement의 정도(精度)는 dot grid method에 의(依)한 것 보다 떨어진다.

• 대한수학교육학회지:수학교육학연구
• /
• 제20권3호
• /
• pp.305-322
• /
• 2010

평면도형의 넓이 학습에서 나타나는 인식론적 장애의 유형은 크게 측정의 속성과 관련된 장애, 단위정사각형 개념과 관련된 장애로 나눌 수 있다. 먼저, 측정의 속성과 관련된 장애의 원인은 길이와 넓이 개념 사이의 혼동, 도형 영역과 측정 영역에서 정의하는 방법상의 혼동 때문이며, 둘째, 단위정사각형 개념과 관련된 장애의 원인은 학생들에게 단위정사각형이 넓이의 기본단위로 인식이 잘 안되기 때문이며, 2 차원적 평면의 개념이 불완전하게 정착했기 때문이다. 이에 따라, 넓이에 대한 측정의 속성과 관련된 장애 현상의 교정적 지도 방안은 두 속성간의 관계를 살펴볼 수 있는 활동을 제시하고, 측정의 개념으로 넓이를 정의할 필요가 있으며, '정렬(array)'의 개념으로 넓이공식을 유도하고, 통합적으로 공식을 적용하도록 지도할 필요가 있다. 한편, 단위정사각형 개념과 관련된 장애 현상의 지도방안은 각 단계를 충분히 활동할 수 있도록 넓이를 구하고자하는 도형의 소재 및 형태를 다양하게 제시할 필요가 있으며, 넓이에 대한 연속량적 개념을 인식하도록 교수학적 방안을 구안해야 한다.

• 대한기계학회논문집A
• /
• 제26권2호
• /
• pp.254-259
• /
• 2002

A variable air-gap type system is widely used for inductive precision position measurement systems. This type transducer has high sensitivity but lacks a linear measurement range due to structural nonlinearity. Furthermore, as measurement range increases, linearity error is also increased. The alternative is a variable overlap-area type system. The sensitivity of this type is determined by the initial air-gap dimension, keeps the original value and does not deteriorate linearity in spite of the variations of the measuring range.

• 한국구조물진단유지관리공학회 논문집
• /
• 제3권2호
• /
• pp.221-232
• /
• 1999

This study investigates the applicability and design scheme of fieldbus network in the measurement system used for precise and safe construction as well as efficient maintenance of bridges. In order to maximize the function and performance of bridge monitoring system, this study introduces the CAN(Controller Area Network), one of the fieldbus protocols, in the measurement system of bridges. This study presents the implementation method of CAN on the monitoring system of bridge, and also proposes a bandwidth allocation scheme for the design of network. The validity of the proposed CAN design method is verified through a simulation experiment. It is shown that the CAN can be readily applicable to the measurement system of bridges.

• 대한방사선기술학회지:방사선기술과학
• /
• 제21권2호
• /
• pp.5-10
• /
• 1998

In the mammography, X-ray beam quality is one of the most important factors. Using X-ray mammography unit model GE/CGR Senography 600T Senix H.F, Authors studied four subjects. 1. The aluminum attenuation rate in 30 kVp when used with or without compression plate. 2. HVLs at 5 different area of the X-ray field of $26{\sim}32kVp$. 3. HVLs to know the influence of corrected measurement or parallel measurement. 4. Film density with microdensitometer along and cross to the long axis of X-ray tube, in terms of the Heel effect in the X-ray field. The following results were obtained. 1. Beam quality of anode area was harder than cathode area. 2. The dose reduction rate of compression plate was approximately $65.5%{\sim}88.1%$ and the beam quality with compression plate was hardened up to 4kVp accordingly. 3. If the X-ray beam enters the attenuation plate obliquely, HVL was $2.6{\sim}2.9%$ harder than perpendicular to it. 4. Because of heel effect, the film density of cathode area is higher than anode area to film density of 0.5.

• 한국의류학회지
• /
• 제19권2호
• /
• pp.287-296
• /
• 1995

measuring surface area errors can be brought about with different measuring people. This study aims at eliminating such errors in measurement. With measures by 3 people whose experience varies from person to person, the existing area measuring method using a planimeter and two other methods which use a computer (one using a digitizer and the other using a scanner) have been analyzed and compared. Three methods have not shown a meaningful difference in respect to the value" of area and two methods other than the one using a scanner have shown a meaningful difference among 3 measuring people. Therefore, we propose the method using a scanner by image processing should be a more improved one for area measuring. The arguments for that are as fllows. 1. The operation for measurement is simple and it has a high degree of accuracy with few errors. 2. Because different measuring people cause few errors the operation started by one person can be handed over to anyone else and the operation dosen't require previous skill. 3. Once image file is saved, the operation can be performed on several computers at the same time with seperate part on each computer. 4. Three methods have needed nearly the same length of time, but time for the method using a scanner can be reduced on computers with a higher capacity.th a higher capacity.

• 한국방재학회 논문집
• /
• 제8권1호
• /
• pp.103-108
• /
• 2008

Riverbed change is greatly influenced by artificial factors such as dam construction, gravel collection, and river improvement. This study simulated a long-term bed change based on the GSTARS3 model using actual data from the area downstream of the Geum River Daecheong Dam and compared the estimation with a section of the actual measurement. As a result, it was found that the section of the actual measurement was far lower than the result of the simulation in terms of long-term bed change. While the area downstream of Daecheong Dam displayed approximately an average of 2.29 m of streambed degradation on average while the upper stream area showed approximately 0.63 m of bed degradation over 24 years. In the simulation of the area downstream of Daecheong Dam based on the GSTARS3 model, similar bed degradation was observed. However, a great difference was detected between the result and the actual measurement. According to the cause analysis, the riverbed in the area downstream of Daecheong Dam has continuously degraded due to the dam construction and mass collection of gravel. The mass collection of gravel was the main cause of riverbed change. It was found that about 76% of all riverbed degradation was caused by the mass collection of gravel.