• 한국멀티미디어학회논문지
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• 제16권4호
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• pp.483-492
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• 2013

SURF는 영상의 특징점을 추출하고 서술자를 생성하는 알고리즘으로 객체인식 및 추적, 파노라마 이미지 생성 등 여러 영상처리 시스템에 응용되고 있다. SURF 알고리즘은 영상의 크기, 회전, 시점 등의 변화에 강인한 특징을 갖지만 복잡하고 반복적인 연산이 많아 실시간 처리가 어렵다. 실제 PC(Pentium, 3.3GHz) 환경에서 1000개 정도의 특징점이 추출되는 VGA($640{\times}480$) 해상도의 영상을 이용하여 실험한 결과 특징점 추출 및 서술자 생성에 총 240ms 이상이 걸려 약 4frame/sec로 실시간 처리가 불가능한 것을 확인하였다. 본 논문에서는 SURF 알고리즘의 메모리 접근 패턴을 분석하여 라인 메모리를 효율적으로 구성해 메모리 사용을 최소화하고 반복적으로 수행되는 연산을 병렬처리 하는 방법으로 하드웨어를 설계하였다. 하드웨어 설계 검증 결과 Xilinx사의 Virtex5LX330 FPGA를 타겟으로 합성 시 101,348LUTs(66%)와 1,367KB의 내부 메모리를 사용하고, 100MHz 동작 클록에서 30 frame/sec로 실시간 처리가 가능함을 볼 수 있었다.

• 대한한의학회지
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• 제31권1호
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• pp.153-161
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• 2010

Objective: The primary objective of this study was to evaluate the effect of Paljung-san on lower urinary tract symptoms (LUTS) in patients with benign prostatic hyperplasia (BPH). Methods: We researched four men with BPH and LUTS, who were treated 3 times a day for 10 days with Paljung-san. The International Prostate Symptom Score (IPSS) and post void residual urine (PVR) were evaluated. Results: The mean decrease in IPSS total score was 13 points (P=0.007, Mann-Whitney test). The reduction of IPSS was more prominent in the obstructive subscore but was not significant (P=0.057, Mann-Whitney test). Furthermore, Paljung-san reduced PVR. Conclusions: After the 10-day treatment period, Paljung-san improved total IPSS score, especially in the obstructive subscale score, and reduced post void residual urine.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.697-700
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• 2006

본 연구에서는 가정이나 일반 사무실 등에서 편리하게 하부요로계의 폐색을 진단하기 위하여 요속과 동시에 배뇨 시 발생하는 요류음을 계측할 수 있는 센서 및 계측 시스템을 구현하였다. 구현된 시스템은 로드셀을 이용한 요속계측센서, 청진기형 요류음 계측센서, 센서신호의 검출을 위한 전처리부, 신호의 증폭 및 필터부, 시스템 제어부, PC 계측 프로그램 등으로 구성되었다. 구현된 시스템의 평가를 위하여 하부요로계를 모식화한 실험장치를 구현하였다. 구현된 실험장치를 이용하여 요속 및 요음을 계측하고 시간영역과 주파수영역에서의 분석을 통해 하부요로계의 폐색을 가장 잘 반영하는 특징파라미터를 추출하고자 하였다. 그리고 구현된 시스템의 임상적용 가능성을 평가하기 위하여 정상인 5병을 대상으로 요속 및 요류음을 계측하고 분석하였다. 그 결과 요류음 신호의 $253\sim282Hz$ 대역이 폐색의 정도를 가장 잘 반영하는 것으로 나타났다.

• Journal of Forest and Environmental Science
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• 제38권3호
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• pp.141-151
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• 2022

Soil seed banks as natural storage of plant seeds play an important role in the maintenance and regeneration of watershed. Natural regeneration potential of the soil seed bank of Land use types (LUTs) in Ogun River watershed (ORW) was investigated. ORW was stratified using proportionate sampling technique into Guinea Savannah (GS), Rainforest (RF) and Swamp Forest (SF) Ecological Zones (EZs). Three LUTs: Natural Forest (NF), Disturbed Forest (DF) and Farmland (FL) were purposively selected in GS: GSNF, GSDF, GSFL; RF: RFNF, RFDF, RFFL and SF: SFNF, SFDF, SFFL, respectively. Systematic line transects was used in the laying of the sample plots. Sample plots of 25 m×25 m were established in alternate positions. Ten 1 m×1 m quadrats were randomly laid for soil core sampling from previously randomly selected ten plots. The core samples (10) were pooled per plot in each LUT and placed in individual trays. Ten trays with sterilized soil were used as control. The trays were watered regularly and checked for seedlings emergence fortnightly for 18 months. The experimental design used was 3×3 factorial experiments. ANOVA, Diversity index (H') and Similarity index (SI) were used to analyze the data. There was significant difference in seedling emergence among ecological zones and land use types (p<0.05). A total of 4,400 seedlings emerged from the soil samples. All species were distributed among 32 families. FL in the RF had the highest number of germinated seeds (705±37.33 seedlings) followed by DF in the RF (701±49.6 seedlings). The lowest emergence was in NF of the SF (199±28.41 seedlings). DF in the RF had highest number of species (34) distributed among 22 families. Emergence from soil seed bank of NF in ORW was generally with more of tree species than herbs that were predominant in FL and DF.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.863-864
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• 2006

The aim of this study is to acquire useful information of lower urinary tract symptom(LUTS) diagnosis through urophonogaphy signal as noninvasive method. The system was implemented to measure urophonography signal, urinary volume and uroflow. The slope of the log-log plot of power spectrum density changed rapidly from $2.01{\sim}2.07$ to over 3.32 when the occlusion rate was 2 mm to 3.8 mm. This information combined with the uroflow parameters could give a useful prediction of lower urinary tract symptoms.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.425-426
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• 2006

Overdriving schemes are used to improve the response time of liquid crystal display. Typically they are implemented by using LUTs (look-up table) within an image processor. However, the size of LUT is limited by the physical memory size and system cost. In this paper, we present an improved method for LUT implementation using linear interpolation and piecewise least-square polynomial regression. Using the proposed method, the performance of LUT can be improved and memory size of that can be reduced.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.818-821
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• 2007

Two new impulsive driving technologies for use in 120Hz LCD panels are proposed to improve moving picture quality. One technology generates the dark frame using an adder and a shifter simply without using any LUTs. The other is a backlight flashing method designed to avoid ghost images. Using the PBET metric, measured MPRT values were 10.8ms and 4.4ms, respectively.

• 전기전자학회논문지
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• 제14권4호
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• pp.297-304
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• 2010

This paper presents a link layer design of DisplayPort interface with a state machine based on packet processing. The DisplayPort link layer provides isochronous video/audio transport service, link service, and device service. The merged video, audio main link, and AUX channel controller are implemented with 7,648 LUTs(Loop Up Tables), 6020 register, and 821,760 of block memory bits synthesized using a FPGA board and it operates at 203.32MHz.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 춘계학술대회 논문집
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• pp.154-159
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• 2005

In this paper, We used the microphone unlike existing urodynamic inspection which diagnoses the LUTS(lower urinary tract symptoms) and proposed sound measurement the method which the urination happens and apply at a blockade diagnosis. To analyze the blockade degree, We made the experiment set to modeling the Lower Urinry System of the human body and made the microphone of the stethoscope form for the measurement of the urinary sound which the urination happens. We used PC for the analysis of the urinary sound to be measured and implemented the analysis program to use the MATLAB. Hereafter, An analysis result usage, The Practical use will be possible as one of new inspection methods's.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 춘계학술대회 논문집
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• pp.112-115
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• 2005

In this paper, had known weighing machine from the urine weight measuring, nonflexible net type resistant installed on uroflowmetry measures of occured uroflow from the origin voided flow vector force and detrusor action related to gain newly form's uroflowmetry embodied and than, whether clinical application took usefulness assessment.