Recognition of partially occluded threat objects using the annealed Hopefield network

Recognition of partially occluded objects has been an important issue to airport security because occlusion causes significant problems in identifying and locating objects during baggage inspection. The neural network approach is suitable for the problems in the sense that the inherent parallelism of neural networks pursues many hypotheses in parallel resulting in high computation rates. Moreover, they provide a greater degree of robustness or fault tolerance than conventional computers. The annealed Hopfield network which is derived from the mean field annealing (MFA) has been developed to find global solutions of a nonlinear system. In the study, it has been proven that the system temperature of MFA is equivalent to the gain of the sigmoid function of a Hopfield network. In our early work, we developed the hybrid Hopfield network (HHN) for fast and reliable matching. However, HHN doesn't guarantee global solutions and yields false matching under heavily occluded conditions because HHN is dependent on initial states by its nature. In this paper, we present the annealed Hopfield network (AHN) for occluded object matching problems. In AHN, the mean field theory is applied to the hybird Hopfield network in order to improve computational complexity of the annealed Hopfield network and provide reliable matching under heavily occluded conditions. AHN is slower than HHN. However, AHN provides near global solutions without initial restrictions and provides less false matching than HHN. In conclusion, a new algorithm based upon a neural network approach was developed to demonstrate the feasibility of the automated inspection of threat objects from x-ray images. The robustness of the algorithm is proved by identifying occluded target objects with large tolerance of their features

Flight simulator for hypersonic vehicle and a study of NASP handling qualities

The research goal of the Human-Machine Systems Engineering Group was to study the existing handling quality studies in aircraft with sonic to supersonic speeds and power in order to understand information requirements needed for a hypersonic vehicle flight simulator. This goal falls within the NASA task statements: (1) develop flight simulator for hypersonic vehicle; (2) study NASP handling qualities; and (3) study effects of flexibility on handling qualities and on control system performance. Following the above statement of work, the group has developed three research strategies. These are: (1) to study existing handling quality studies and the associated aircraft and develop flight simulation data characterization; (2) to develop a profile for flight simulation data acquisition based on objective statement no. 1 above; and (3) to develop a simulator and an embedded expert system platform which can be used in handling quality experiments for hypersonic aircraft/flight simulation training

Proposal of Design Concept for Inducing Recycling Behavior through Framing Effect

선택의 상황에서 인간은 이성적이거나 논리적 사고보다 직관과 감정에 기반을 둔 선택을 하는 경우가 많다. 사물은 통해 형성되는 기분이나 감정은 행동을 결정하는데 많은 영향을 준다. 본 연구는 사회적, 환경적 행동의 하나인 쓰레기 버리기를 주제로 프레이밍 효과를 이용한 행동유도 디자인의 가능성을 제안하고자 한다. 본 연구는 프레이밍 효과와 행동유도 디자인 사례 분석, 그리고 Design with Intent를 활용한 쓰레기 버리기 행동 컨셉 제안의 과정으로 연구를 진행하였다.OAIID:RECH_ACHV_DSTSH_NO:A201701884RECH_ACHV_FG:RR00200003ADJUST_YN:EMP_ID:A080155CITE_RATE:FILENAME:HCI2017_프레이밍 효과를 활용한 분리수거를 유도하는 디자인 컨셉 제안.pdfDEPT_NM:디자인학부EMAIL:[email protected]_YN:FILEURL:https://srnd.snu.ac.kr/eXrepEIR/fws/file/53a612b3-5c90-401c-84dc-6e460126acc9/linkCONFIRM:

State of Air Pollution and Policy Issues in Seoul, Republic of Korea

The Republic of Korea has experienced severe environmental problems including air pollution because of the rapid urbanization and industrialization during the last three decades. The government has taken various countermeasures in order to solve the air pollution problems. The efforts to reduce the levels of sulfur dioxide(SO₂) and total suspended particulates (TSP) have been quite successful while nitorogen oxides and ozone (O₃) are emerging as more serious threats to the urban atmospheric environment due to the ever-increasing automobiles. The spacio-temporal analyses of the air quality using the monitoring data for the last ten years clearly revealed that the air quality changed with the urban development and countermeasure policies adopted. Future policy recommendations are made based on th analyses. As shown in Figure 1. the annual average levels of SO₂, TSP and CO decreased by 62%, 65% and 44%, respectively, over the last decade (1984-1993), while the oxidants' level (analysed as O₃) showed 63% increase during the same period. The level of NO₂ showed a slight increase in recent years

Policy Responses Towards Improving Solid Waste Management Seoul City

The Seoul City has been the capital city of the nation for about 600 years. However, the City experienced rapid growth only in recent years. The Republic of Korea remained an agricultural country until early 1960s. The rapid industrialization began with the First 5-year Economic Development Plan which started in 1962. The Seoul City grew very rapidly with the success of industrialization. The population of the City increased from 3,471 thousand in 1965 to 10,287 thousand in 1988, which occupies 23.9 per cent of the national total population. The annual population increase rate of the City during the time was 5. 07 per cent while the national average was 1. 66 per cent. As results of rapid industrialization and urbanization, the City faced with serious urban problems such as housing, traffic congestion, environmental pollution, and others. Among them, the solid waste management issue emerged as one of the most urgent urban problems in the City. Traditionally, Korean people did not produce any wastes to be dumped collectively: all wastes were recycled in principle. Wastes were either fed to livestocks or were utilized as fertilizer. However, the citizens could no more practice recycling as the composition of wastes changed and the City became congested. The Metropolitan Government organized a department responsible for managing solid wastes only in early 1960s

Novel LMNA Gene Mutation in a Patient With Atypical Werner's Syndrome

Hutchinson-Gilford progeria syndrome (HGPS) and Werner's syndrome are representative types of progeroid syndrome. LMNA (Lamin A/C) gene mutation with atypical Werner's syndrome have recently been reported. Atypical Werner's syndrome with the severe metabolic complications, the extent of the lipodystrophy is associated with A133L mutation in the LMNA gene and these patients present with phenotypically heterogeneous disorders. We experienced a 15-yr-old Korean female with progeroid features, generalized lipodystrophy, hypertriglyceridemia, fatty liver, steatohepatitis, and type 2 diabetes mellitus. Skin fibroblasts from the patient showed marked abnormal nuclear morphology, compared with that from normal persons. Gene analysis revealed that this patient had T506del of exon 2 in the LMNA gene. We report here the first case of atypical Werner's syndrome with frameshift mutation that was caused by T506del

Interferon-inducible protein SCOTIN interferes with HCV replication through the autolysosomal degradation of NS5A

Hepatitis C virus (HCV) utilizes autophagy to promote its propagation. Here we show the autophagy-mediated suppression of HCV replication via the endoplasmic reticulum (ER) protein SCOTIN. SCOTIN overexpression inhibits HCV replication and infectious virion production in cells infected with cell culture-derived HCV. HCV nonstructural 5A (NS5A) protein, which is a critical factor for HCV RNA replication, interacts with the IFN-beta-inducible protein SCOTIN, which transports NS5A to autophagosomes for degradation. Furthermore, the suppressive effect of SCOTIN on HCV replication is impaired in both ATG7-silenced cells and cells treated with autophagy or lysosomal inhibitors. SCOTIN does not affect the overall flow of autophagy; however, it is a substrate for autophagic degradation. The physical association between the transmembrane/proline-rich domain (TMPRD) of SCOTIN and Domain-II of NS5A is essential for autophagosomal trafficking and NS5A degradation. Altogether, our findings suggest that IFN-beta-induced SCOTIN recruits the HCV NS5A protein to autophagosomes for degradation, thereby restricting HCV replication.1110Ysciescopu