Ghost Vehicle and Shadow Removal Approach for Traffic Surveillance and Monitoring at Various Intersections Using Computer Vision

Mohammad Farukh Hashmi,Avinash G. Keskar,Ravula Sai Kiran Reddy,Ambati Uday Kaushik 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3

As traffic surveillance technology continues to grow worldwide vehicle detection, counting, tracking and classification are gaining importance. This paper proposes computer vision based real time vehicle detection, tracking and classification at urban intersections. Firstly, foreground extraction using double subtraction method is proposed, which increases the accuracy of blob detection. Classification based on the geometrical attributes of the vehicle and also quadrant division of the junction is put forward. Setting up dynamic ROIs is discussed, which increased the scope of traffic surveillance for different types of junctions. The proposed system is implemented using Intel Open CV library for image processing and video processing applications. The Practical implementation of the algorithm is made with C++ and computer vision. Several junction surveillance videos are used to evaluate the performance of the traffic surveillance system. In this paper, detection, tracking and classification of objects in with removal of shadow and ghost vehicles at different junction in video surveillance .Proposed work elaborated computer vision approach for Traffic monitoring in traffic surveillance application. Test results in the performance of the proposed algorithm in detection, classification and counting and proved the effectiveness of the traffic surveillance system. Obtained results showed a better performance in terms of accuracy.

이중 미스터리, 식민지 하이테크 - 식민지 ‘탐정 스파이물’ 연구

송효정 한국문학이론과비평학회 2010 한국문학이론과 비평 Vol.49 No.-

The concern of this study is investigating the shapes and functions of the detectives-spies from mid 1930s to 1945. For this I'll examine detective-espionage novels and movies with Japanese colonial-era setting. The private-detective is a individual in the Kyeung Seung(京城), modernized colonial city. But there was an abnormality of modernization and urbanization at the Japanese colonial era. There are double mysteries at the core of most colonial detective narratives on a private and nation-imperial level. The mystery that happened at the private space used to be extend to the ethnic-imperial dimension. In the colonial narrative, the private-detective has to examine bourgeois crime. Then the crime is relate tacitly with the deprived sovereignty. So the most abominable crime is not a mere something individual but an indication of imperialistic conspiracy of Japan. Meanwhile, the police-detective is belong to Japanese authority. Officially he performs public interest, but the power divided to him is in collusion with Japan. So he is inferior to the private-detective all along from the ethico-ethnical point of view. If the criminal-detective were an native Korean, the situation could be more subtle. In the middle 1930s, the detective becomes a spy as agent of ethnic against imperialistic Japan. But during late 1930s-1945 the detective has to arrest international spy ring for the sake of Japanese military police. The person who has new-advanced knowledge and technology can preoccupy the higher hegemony of intelligence. In these detective narratives, technology seems to function on two aspects. First, the private-detective usually shows off his high-tech technology. It works as a superficial style for him. It is not necessary to solve the kernel of mystery. But it is only the ornamental equipment that demonstrated his intelligence. Second, technology becomes constructive requisite for the narrative. The main plot of anti-espionage narrative is like that; a private-detective has to seek out spies who steal the highly technologized weapon.

반향제거기의 수렴전 동시통화검출

유재하,김수찬,김동연,Yoo, Jae-Ha,Kim, Soo-Chan,Kim, Dong-Yon 한국인터넷방송통신학회 2013 한국인터넷방송통신학회 논문지 Vol.13 No.5

본 논문에서는 반향제거기가 수렴하기 전에 동작할 수 있는 동시통화검출기의 성능 향상에 대한 방법을 제안하였다. 마이크로폰에 입력된 신호를 선형예측필터에 통과시키고, 이 필터링 된 신호를 사용하여 검출을 수행하게 된다. 선형예측필터 계수는 원단화자신호의 음성으로부터 얻어진다. 단일통화 시에는 반향신호가 원단화자의 신호와 유사한 음성특성을 가지므로 필터링 된 신호가 작은 값을 갖게 된다. 그러나 동시통화가 발생한 경우에는 마이크로폰 신호에 다른 특성을 갖는 신호가 포함되어 있어서 파워가 줄어들지 않게 된다. 이를 사용하여 동시통화를 검출하게 된다. 음성신호를 사용한 모의 실험을 통하여 제안한 방법이 기존의 방법에 비해 동시통화를 빠르게 검출함으로서 성능이 우수함을 확인할 수 있었다. In this paper, we proposed a performance improvement method of the double talk detector which can operate before the echo canceller converges. Microphone input signal is filtered by the linear prediction filter and this filtered signal is used for detection. The coefficients of the linear prediction filter are given by the far-end talker signal. During single talk, filtered signal has low power since the characteristics of the echo signal is similar with those of the far-end talker signal. But, during double talk, the filtered signal does not have low power because the signal of different characteristics is included in the microphone signal. Double talk is detected by this difference. Simulations using real speech signals verified that the proposed method outperformed the conventional methods.

Efficacy of a modified Double-Ovsynch protocol for the enhancement of reproductive performance in Hanwoo cattle

Jeong Jae Kwan,Kim Ui-Hyung,김일화 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.4

Objective: We aimed to evaluate the efficacy of a modified Double-Ovsynch protocol vs artificial insemination following estrus detection (AIED) for the enhancement of reproductive performance in Hanwoo cattle. Methods: Four hundred twelve Hanwoo cows were allocated to two treatment groups. The first group of cows were administered gonadotropin releasing hormone (GnRH) on Day 36 (±0.6), prostaglandin F2α (PGF2α) on Day 46 (8 to 12 days later), and GnRH on Day 49, which was followed by Ovsynch, consisting of an injection of GnRH on Day 56, PGF2α on Day 63, and GnRH 56 h and timed AI (TAI) 16 h later (modified Double-Ovsynch group, n = 203). The second group of cows underwent AIED (AIED group, n = 209) and were designated as controls. Results: The pregnancy per AI 60 days after the first AI was higher in the modified Double- Ovsynch (68.5%) than in the AIED (56.5%) group, resulting in a higher probability of pregnancy per AI (odds ratio: 1.68, p<0.05). Moreover, cows in the modified Double- Ovsynch group were more likely (hazard ratio: 1.28, p<0.05) to be pregnant by 150 days after calving than cows in the AIED group, and this difference was associated with a lower mean number of AIs per conception (1.27 vs 1.39, p<0.05) and a shorter median interval between calving and pregnancy (72 vs 78 days, p<0.1). Conclusion: The modified Double-Ovsynch protocol, adjusted according to the herd visit schedule, can be readily used to increase the pregnancy per AI following the first AI and to shorten the interval between calving and pregnancy in beef herds.

Application of Engineered Zinc Finger Proteins Immobilized on Paramagnetic Beads for Multiplexed Detection of Pathogenic DNA

( Jiyoung Shim ),( Langley Williams ),( Dohyun Kim ),( Kisung Ko ),( Moon-soo Kim ) 한국미생물 · 생명공학회 2021 Journal of microbiology and biotechnology Vol.31 No.9

Micro-scale magnetic beads are widely used for isolation of proteins, DNA, and cells, leading to the development of in vitro diagnostics. Efficient isolation of target biomolecules is one of the keys to developing a simple and rapid point-of-care diagnostic. A zinc finger protein (ZFP) is a doublestranded (ds) DNA-binding domain, providing a useful scaffold for direct reading of the sequence information. Here, we utilized two engineered ZFPs (Stx2-268 and SEB-435) to detect the Shiga toxin (stx2) gene and the staphylococcal enterotoxin B (seb) gene present in foodborne pathogens, Escherichia coli O157 and Staphylococcus aureus, respectively. Engineered ZFPs are immobilized on a paramagnetic bead as a detection platform to efficiently isolate the target dsDNA-ZFP bound complex. The small paramagnetic beads provide a high surface area to volume ratio, allowing more ZFPs to be immobilized on the beads, which leads to increased target DNA detection. The fluorescence signal was measured upon ZFP binding to fluorophore-labeled target dsDNA. In this study, our system provided a detection limit of ≤ 60 fmol and demonstrated high specificity with multiplexing capability, suggesting a potential for development into a simple and reliable diagnostic for detecting multiple pathogens without target amplification.

Fault Line Detection Methodology for Four Parallel Lines on the Same Tower

Li, Botong,Li, Yongli,Yao, Chuang The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.4

A method for faulted line detection of four parallel lines on the same tower is presented, based on four-summing and double-differential sequences of one terminal current. Four-summing and double-differential sequences of fault current can be calculated using a certain transformation matrix for parameter decoupling of four parallel transmission lines. According to fault boundary conditions, the amplitude and phase characteristics of four-summing and double-differential sequences of fault current is studied under conditions of different types of fault. Through the analysis of the relationship of terminal current and fault current, a novel methodology for fault line detection of four parallel transmission line on the same tower is put forward, which can pick out the fault lines no matter the fault occurs in single line or cross double lines. Simulation results validate that the methodology is correct and reliable under conditions of different load currents, transient resistances and fault locations.

Fault Line Detection Methodology for Four Parallel Lines on the Same Tower

Botong Li,Yongli Li,Chuang Yao 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.4

A method for faulted line detection of four parallel lines on the same tower is presented, based on four-summing and double-differential sequences of one terminal current. Four-summing and double-differential sequences of fault current can be calculated using a certain transformation matrix for parameter decoupling of four parallel transmission lines. According to fault boundary conditions, the amplitude and phase characteristics of four-summing and double-differential sequences of fault current is studied under conditions of different types of fault. Through the analysis of the relationship of terminal current and fault current, a novel methodology for fault line detection of four parallel transmission line on the same tower is put forward, which can pick out the fault lines no matter the fault occurs in single line or cross double lines. Simulation results validate that the methodology is correct and reliable under conditions of different load currents, transient resistances and fault locations.

Development of a Particle-γ Coincidence Detection System Built with Position-Sensitive Semiconductor Detectors

J. H. Lee,C. S. Lee,H. S. Jung,Y. K. Kwon 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2

We propose a particle-γ coincidence detection system consisting of double-sided silicon detectors (DSSDs) and 16-pixellated CdZnTe detectors (16pCZTs) for nuclear reaction studies. The 16pCZTs can be used for γ-ray spectroscopy, such as energy and linear polarization measurements of rays emitted from reaction residues, while the DSSDs can be used for particle spectroscopy, such as energy measurement and particle identification for reaction ejectiles. Using the DSSDs in conjunction with the 16pCZTs, we can measure the particle-γ angular correlation and then determine the spin and parity, i.e., the spectroscopic factors, as well as the excitation energy for the nuclear states of reaction residues. Before developing the detection system, we performed a performance test of a DSSD and a 16pCZT with a 226Ra α-decay source and 133Ba and 22Na γ-ray sources. The particle-γ detection performance was also investigated with a 4601-keV α particle emitted from the 226Ra source and an 186.3-keV transition γ ray emitted from the first excited state of 222Rn, and was then compared with the performance of a system consisting of a high-purity germanium detector (HpGe). Despite the poor energy resolution of the 16pCZT, the proposed system is expected to function as an efficient and useful tool for in-beam particle-γ spectroscopy and other applications because of its compactness and high sensitivity. We propose a particle-γ coincidence detection system consisting of double-sided silicon detectors (DSSDs) and 16-pixellated CdZnTe detectors (16pCZTs) for nuclear reaction studies. The 16pCZTs can be used for γ-ray spectroscopy, such as energy and linear polarization measurements of rays emitted from reaction residues, while the DSSDs can be used for particle spectroscopy, such as energy measurement and particle identification for reaction ejectiles. Using the DSSDs in conjunction with the 16pCZTs, we can measure the particle-γ angular correlation and then determine the spin and parity, i.e., the spectroscopic factors, as well as the excitation energy for the nuclear states of reaction residues. Before developing the detection system, we performed a performance test of a DSSD and a 16pCZT with a 226Ra α-decay source and 133Ba and 22Na γ-ray sources. The particle-γ detection performance was also investigated with a 4601-keV α particle emitted from the 226Ra source and an 186.3-keV transition γ ray emitted from the first excited state of 222Rn, and was then compared with the performance of a system consisting of a high-purity germanium detector (HpGe). Despite the poor energy resolution of the 16pCZT, the proposed system is expected to function as an efficient and useful tool for in-beam particle-γ spectroscopy and other applications because of its compactness and high sensitivity.

양면 인쇄법을 이용한 중금속 검출용 3D 종이 기반 분석장치 제작

최진솔,정헌호 한국청정기술학회 2022 청정기술 Vol.28 No.4

Microfluidic paper-based analytical devices (PADs) have recently been in the spotlight for their applicability in point-of-care diagnostics and environmental material detection. This study presents a double-sided printing method for fabricating 3D-PADs, providing simple and cost effective metal ion detection. The design of the 3D-PAD was made into an acryl stamp by laser cutting and then coating it with a thin layer of PDMS using the spin-coating method. This fabricated stamp was used to form the 3D structure of the hydrophobic barrier through a double-sided contact printing method. The fabrication of the 3D hydrophobic barrier within a single sheet was optimized by controlling the spin-coating rate, reagent ratio and contacting time. The optimal conditions were found by analyzing the area change of the PDMS hydrophobic barrier and hydrophilic channel using ink with chromatography paper. Using the fabricated 3D-PAD under optimized conditions, Ni2+, Cu2+, Hg2+, and pH were detected at different concentrations and displayed with color intensity in grayscale for quantitative analysis using ImageJ. This study demonstrated that a 3D-PAD biosensor can be applied to detect metal ions without special analysis equipment. This 3D-PAD provides a highly portable and rapid on-site monitoring platform for detecting multiple heavy metal ions with extremely high repeatability, which is useful for resource-limited areas and developing countries. 미세유체 종이-기반 분석 장치는 최근 현장 진단 및 환경 물질 감지를 포함한 다양한 적용가능성으로 주목을 받고 있다. 본 연구는 적은 비용과 간단한 검출 방법으로 중금속을 빠르게 검출할 수 있는 3D-PAD를 제작하기 위해 PDMS 양면 인쇄 방법을제안하였다. 3D-PAD 디자인은 레이저 커팅으로 아크릴 스탬프에 적용할 수 있으며, 제작된 스탬프에 PDMS 고분자를 스핀코팅 후 양면접촉인쇄 방식 도입을 통해 3차원 형태의 소수성 장벽 형성에 필요한 조건을 확인하였다. 구체적으로 소수성 장벽 형성 조건인 고분자 농도, 스핀 코팅 속도 및 접촉 시간에 따라 PDMS 소수성 장벽 면적과 친수성 채널의 면적 변화를 분석함으로써 3D-PAD 제작 공정 조건 최적화를 수행하였다. 최적화된 PAD로 니켈, 구리, 수은 이온, pH를 다양한 농도에서 검출하였고 이를 ImageJ 프로그램으로 분석하여 grayscale 값으로 정량화 하였다. 이를 통해 3D-PAD를 제작함으로써 특별한분석 기기 없이 다양한 중금속 비색 검출을 수행함으로써 조기진단 바이오 센서로의 응용 가능성을 증명하였다. 이 3D-PAD 는 휴대가 간편한 다중 금속이온 검출 바이오센서로서, 신속한 현장 모니터링이 가능하므로 개발도상국 같은 자원이 제한된지역에서 유용하게 사용 가능하다.

이중구조 무기형광 함침막 제조 및 방사성핵종 탐지능력의 분석

이근우,서범경,박진호,남석태,한명진 한국막학회 2002 멤브레인 Vol.12 No.4

방사선과의 상호작용에 의하여 섬광이 발생하는 무기형광체(inorganic fluor)인 cerium activated yttrium silicate(CAYS)를 폴리설폰 고분자막에 함침시킴으로써, 형광 용액의 도움 없이 방사능 오염도를 측정할 수 있는 새로운 측정막을 제조하였다. 막의 제조는 두 가지 공정으로 나누어진다. 우선 고분자와 용매의 균일한 1차 제막용액을 유리판 위에 제막 후 용매증발을 통해 폴리설폰 고분자막이 생성되도록 하였다. 고형화된 폴리설폰 필름 표면에 CAYS가 분산된 고분자 제막용액을 2차로 도포시킨 후, 비용매 욕조에 침지시키는 상전환 공정을 이용하거나 용매의 증발을 통한 유리화에 의해 2차 용액의 고형화를 유도함으로써 함침막을 제조하였다. 이렇게 제조된 막의 형상은 치밀한 구조를 지니는 고분자 지지체와 이에 완전히 고착된 CAYS함침막의 이중구조를 지니게되며, 지지체 부분은 막의 안정성을 2차 제막에서 생성된 부분은 기능성의 향상을 이룰 수 있는 구조적 특성을 지닌다. 제조된 함침막에 방사성핵종을 직접 도포하여 방사성핵종의 탐지 특성을 측정하였을 때 효율적인 탐지 특성을 지니는 것으로 확인되었다. New polysulfone scintillation proximity membranes were prepared by impregnating Cerium Activated Yttrium Silicate (CAYS), an inorganic fluor, in a membrane structure. The membranes were applied to detect the radionuclide contamination directly without the aid of a scintillation cocktail. The preparation of membranes was divided into two processes. A supporting polymer film was made of casting solutions consisting of polysulfone and solvent, their cast film being solidified by vacuum evaporation. CAYS-dispersed polymer solutions were cast over the first, solidified polymer films and coagulated either by evaporating solvent or by exchanging solvent in the solution with nonsolvent in a coagulation bath. The prepared membranes had two distinguished, but tight1y attached, double layers: one is the supporting layer of dense polymer film and the other the detecting layer consisting of CAYS and polymer. The radionuclide counting results revealed that the prepared membranes were efficient to monitor radioactivity contamination with reliable counting ability.