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General Local Transformer Network in Weakly-supervised Point Cloud Analysis (약간 감독되는 포인트 클라우드 분석에서 일반 로컬 트랜스포머 네트워크)

  • Anh-Thuan Tran;Tae Ho Lee;Hoanh-Su Le;Philjoo Choi;Suk-Hwan Lee;Ki-Ryong Kwon
    • Annual Conference of KIPS
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    • 2023.11a
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    • pp.528-529
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    • 2023
  • Due to vast points and irregular structure, labeling full points in large-scale point clouds is highly tedious and time-consuming. To resolve this issue, we propose a novel point-based transformer network in weakly-supervised semantic segmentation, which only needs 0.1% point annotations. Our network introduces general local features, representing global factors from different neighborhoods based on their order positions. Then, we share query point weights to local features through point attention to reinforce impacts, which are essential in determining sparse point labels. Geometric encoding is introduced to balance query point impact and remind point position during training. As a result, one point in specific local areas can obtain global features from corresponding ones in other neighborhoods and reinforce from its query points. Experimental results on benchmark large-scale point clouds demonstrate our proposed network's state-of-the-art performance.

Estimation of Accessibility and Usability in Web Interaction for Personalized Ubiquitous Web Information Services (개인화된 유비쿼터스 웹 정보 서비스를 위한 웹 상호작용의 접근성 및 사용성 평가)

  • Kim, Yung-Bok
    • Journal of KIISE:Software and Applications
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    • v.35 no.8
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    • pp.512-521
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    • 2008
  • Web-based information services should be evaluated for accessibility and usability with various types of Internet Web-browsing devices, interacting with web information servers. A reliable ubiquitous Web information server, accessible and usable with a variety of Web-browsing devices (e.g. a full-browsing mobile phone), should be a unified center for personalized ubiquitous Web information services as well as for business models based on personalized advertisements. We studied an estimation of the accessibility and usability in Web interaction for personalized ubiquitous Web information services, as metrics for real-time estimation. We show empirical results based on implementation and experiments in Korea, Japan and China, using a test-bed Web site ('ktrip.net') and single-character Korean domain names (e.g. 김.net, 이.net, 박.net, 최.net, ㄱ.net, ㄴ.net ... ㅎ.net, ㅏ.net, ... ㅔ.net, ㄱ.com, ㄴ.com ... ㅎ.com).

Multi-Agent Systems: Effective Approach for Cancer Care Information Management

  • Mohammadzadeh, Niloofar;Safdari, Reza;Rahimi, Azin
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.12
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    • pp.7757-7759
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    • 2013
  • Physicians, in order to study the causes of cancer, detect cancer earlier, prevent or determine the effectiveness of treatment, and specify the reasons for the treatment ineffectiveness, need to access accurate, comprehensive, and timely cancer data. The cancer care environment has become more complex because of the need for coordination and communication among health care professionals with different skills in a variety of roles and the existence of large amounts of data with various formats. The goals of health care systems in such a complex environment are correct health data management, providing appropriate information needs of users to enhance the integrity and quality of health care, timely access to accurate information and reducing medical errors. These roles in new systems with use of agents efficiently perform well. Because of the potential capability of agent systems to solve complex and dynamic health problems, health care system, in order to gain full advantage of E- health, steps must be taken to make use of this technology. Multi-agent systems have effective roles in health service quality improvement especially in telemedicine, emergency situations and management of chronic diseases such as cancer. In the design and implementation of agent based systems, planning items such as information confidentiality and privacy, architecture, communication standards, ethical and legal aspects, identification opportunities and barriers should be considered. It should be noted that usage of agent systems only with a technical view is associated with many problems such as lack of user acceptance. The aim of this commentary is to survey applications, opportunities and barriers of this new artificial intelligence tool for cancer care information as an approach to improve cancer care management.

FBAR Devices Fabrication and Effects of Deposition Temperature on ZnO Crystal Growth for RF Filter Applications (RF 필터응용을 위한 FBAR 소자제작과 증착온도가 ZnO 박막의 결정성장에 미치는 영향)

  • Munhyuk Yim;Kim, Dong-Hyun;Dongkyu Chai;Mai Linh;Giwan Yoon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.05a
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    • pp.88-92
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    • 2003
  • In this paper, the characteristics of the ZnO films deposited on AI bottom electrode and the temperature effects on the ZnO film growth are presented along with the fabrication and their evaluation of the film bulk acoustic wave resonator (FBAR) devices. All the films used in this work were deposited using a radio-frequency (RF) magnetron sputtering technique. Growth characteristics of the ZnO films are shown to have a strong dependence on the deposition temperatures ranged from room temperature to 35$0^{\circ}C$ regardless of the RF power applied for sputtering the ZnO target. In addition, according to the growth characteristics of the distinguishably different micro-crystal structures and the degree of the c-axis preferred orientation, the deposition temperatures can be divided into 3 temperature regions and 2 critical temperatures in-between. Overall, the ZnO films deposited at/below 20$0^{\circ}C$ are seen to have columnar grains with a highly preferred c-axis orientation where the full width at half maximum (FWHM) of X-ray diffraction rocking curve is 14$^{\circ}$. Based on the experimental findings, several FBAR devices were fabricated and measured. As a result, the FBAR devices show return loss of ~19.5dB at resonant frequency of ~2.05GHz.

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Efficient Adaptive Modulation Technique for Multiuser OFDMA Systems (다중 사용자 OFDMA 시스템에서의 효율적인 적응 변조 및 부호화 기법)

  • Kwon, Jung-Hyoung;Rhee, Do-Ho;Byun, Il-Mu;Whang, Keum-Chan;Kim, Kwang-Soon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.12C
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    • pp.1240-1248
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    • 2006
  • In this paper, we present a new method for user selection, sub-band allocation, and power allocation in order to maximize the system throughput under the constraint of transmit power in multiuser downlink orthogonal frequency division multiple access (OFDMA) systems with partial channel quality information (CQI). In previous schemes, each user in one cell transmits CQI of all sub-bands to the base station, which requires enormous feedback overhead. Therefore, we proposed an efficient power allocation and modulation and coding selection scheme in which each user transmits partial CQI and one additional information to reduce the amount of feedback. Simulation results show that we can greatly reduce the amount of feedback than full feedback system.

Rate Allocation for Block-based Compressive Sensing (블록기반 압축센싱을 위한 율 할당 방법)

  • Nguyen, Quang Hong;Dinh, Khanh Quoc;Nguyena, Viet Anh;Trinh, Chien Van;Park, Younghyeon;Jeon, Byeungwoo
    • Journal of Broadcast Engineering
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    • v.20 no.3
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    • pp.398-407
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    • 2015
  • Compressive sensing (CS) has drawn much interest as a novel sampling technique that enables sparse signal to be sampled under the Nyquitst/Shannon rate. By noting that the block-based CS can still keep spatial correlation in measurement domain, this paper proposes to adapt sampling rate of each block in frame according to its characteristic defined by edge information. Specifically, those blocks containing more edges are assigned more measurements utilizing block-wise correlation in measurement domain without knowledge about full sampling frame. For natural image, the proposed adaptive rate allocation shows considerable improvement compared with fixed subrate block-based CS in both terms of objective (up to 3.29 dB gain) and subjective qualities.

An Action Unit co-occurrence constraint 3DCNN based Action Unit recognition approach

  • Jia, Xibin;Li, Weiting;Wang, Yuechen;Hong, SungChan;Su, Xing
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.14 no.3
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    • pp.924-942
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    • 2020
  • The facial expression is diverse and various among persons due to the impact of the psychology factor. Whilst the facial action is comparatively steady because of the fixedness of the anatomic structure. Therefore, to improve performance of the action unit recognition will facilitate the facial expression recognition and provide profound basis for the mental state analysis, etc. However, it still a challenge job and recognition accuracy rate is limited, because the muscle movements around the face are tiny and the facial actions are not obvious accordingly. Taking account of the moving of muscles impact each other when person express their emotion, we propose to make full use of co-occurrence relationship among action units (AUs) in this paper. Considering the dynamic characteristic of AUs as well, we adopt the 3D Convolutional Neural Network(3DCNN) as base framework and proposed to recognize multiple action units around brows, nose and mouth specially contributing in the emotion expression with putting their co-occurrence relationships as constrain. The experiments have been conducted on a typical public dataset CASME and its variant CASME2 dataset. The experiment results show that our proposed AU co-occurrence constraint 3DCNN based AU recognition approach outperforms current approaches and demonstrate the effectiveness of taking use of AUs relationship in AU recognition.

The Institutional Repository Development and Revitalization Methods in Korea - Focused on the KAIST's KOASAS - (국내 기관 레포지터리 구축 및 활성화 방안 - KAIST의 KOASAS 사례를 중심으로 -)

  • Lee, Jae-Min;Son, Chung-Ki;Lee, Mi-Young
    • Journal of Information Management
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    • v.39 no.3
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    • pp.179-204
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    • 2008
  • Researchers' performances have been evaluated by contributing to the academic journals officially, and academic journals expanded both quantitatively and qualitatively since academic societies, publishers, and universities has concentrated on publishing journals. Recently, access and usage of academic information was restricted due to commercialization strategies and sudden rising of prices, and against this situation, OA movement came out arguing that academic information should be open to everyone freely. This article studies the case of KOASAS which is based on DSpace, one of the typical institutional repositories, and intends to show up the necessity to construct repositories in institutions universities and suggest the method to make full use of repositories.

A Study on the Wayfinding Model of Outpatient Department in General Hospital (종합병원 외래진료부 진로인지계획 모형에 관한 연구)

  • Han, Gi-Jeung;Lee, Teuk-Koo
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.13 no.2
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    • pp.27-36
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    • 2007
  • Recently, hospital patients experience anxiety, confusion, and stress about wayfinding as the spacial layout and treatment circulatory system of hospitals have become complicated due to their oversized and complex structure. As part of finding a solution to the problem, this study seeks to examine what are the essential elements of the wayfinding planning of O.P.D. in general hospitals, to develop the model of wayfinding, and to suggest the methods of improving the wayfinding system. The research methods of this study adopted were literature review in wayfinding cognition, plan analysis of ten general hospitals, space analysis of these hospitals through space syntax, analysis of the system of visual-perceptual information through a field study, and analysis of surveys and follow-up surveys conducted to support the results. Based on these results, the proposals for finding decision points, providing the information, and developing a model planning are listed as follows. 1) The comprehensive understanding of O.P.D. spacial layout and the visual-perceptual information system is necessary to find the essential elements of wayfinding. 2) The decision points are found through the full understanding of spacial functions, circulation systems, and facility configuration, considering the spacial layout, the bound of the visual-perceptual information system, and the circulatory system. Furthermore, the information decision points could be confined by space syntax. 3) The checklist and color compound & color codes, developed through the planning of signage system and color system could be applied to the methods of providing the information. 4) The planning of wayfinding system according to the whole process of practices for outpatients was mentioned above. The system of visual-perceptual information developed through the process of this study should be integrated in the spacial layout of the whole O.P.D.

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Design and Implementation of Efficient Dynamic Update and Zone Transfer in the Secure DNS (안전한 DNS에서의 효율적인 동적 갱신과 존 전송 기능의 설계와 구현)

  • Shim, Hee-Won;Shim, Young-Chul;Im, Chan-Soon;Lee, Man-Hee;Byeon, Ok-Hwan
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.1
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    • pp.99-114
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    • 2000
  • In the secure DNS the amount of information that should be managed greatly increased and the interdependency in the information became very complex. Therefore, it became necessary to develop a mechanism which can manage zone information efficiently. Moreover, a consistent interface became also necessary so that a secure DNS may be efficiently interconnected with other Internet application services. In this paper we explain the design and implementation of a secure DNS extended with two functions : (1) a dynamic update function which enables to add and remove zone information dynamically and (2) a zone transfer function that efficiently transfers update zone information among DNS servers. We developed a method which integrates two zone transfer mechanisms, full zone transfer and incremental zone transfer, and also proposed a method to compress data in the zone transfer message. We also introduced a data structure called a delta file to integrate the zone transfer function and the dynamic update function.

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