ppxscal/embedding_network huggingface dataset:
Personal content management system: A semantic approach
Authors: Chris Poppe, Gaëtan Martens, Erik Mannens, Rik Van de Walle
Venue: Journal of Visual Communication and Image Representation (2009)

The amount of multimedia resources that is created and needs to be managed is increasing considerably. Additionally, a significant increase of metadata, either structured (metadata fields of standardized metadata formats) or unstructured (free tagging or annotations) is noticed. This increasing amount of data and metadata, combined with the substantial diversity in terms of used metadata fields and constructs, results in severe problems to manage and retrieve these multimedia resources. Standardized metadata schemes can be used but the plethora of these schemes results in interoperability issues. In this paper, we propose a metadata model suited for personal content management systems. We create a layered metadata service that implements the presented model as an upper layer and combines different metadata schemes in the lower layers. Semantic web technologies are used to define and link formal representations of these schemes. Specifically, we create an ontology for the DIG35 metadata standard and elaborate on how it is used within this metadata service. To illustrate the service, we present a representative use case scenario consisting of the upload, annotation, and retrieval of multimedia content within a personal content management system.
Conference key agreement protocol with non-interactive fault-tolerance over broadcast network
Authors: Jiin-Chiou Cheng, Chi-Sung Laih
Venue: International Journal of Information Security (2009)

Most conventional conference key agreement protocols have not been concerned with a practical situation. There may exist some malicious conferees who attempt to block conference initiation for some purposes, e.g. commercial, political or military benefit. Instances where conference must be launched immediately due to emergency, efficient detection of malicious behavior would be needed. Recently, Tzeng (IEEE Trans. Comput. 51(4):373&#x2013;379, 2002) proposed a fault-tolerant conference key agreement protocol to address the issue where a conference key can be established among conferees even though malicious conferees exist. However, his protocol might be complex and inefficient during fault-detection. In the case where a malicious conferee exists and a fault-tolerant mechanism is launched, complicated interactions between conferees will be required. In this paper, we introduce a novel strategy, where any malicious conferee may be identified and removed from the conferee list without any interaction. With such a non-interactive fault-tolerance, conferences could be established and started efficiently. A complete example of our protocol will be given to describe the fascinating fault-tolerance. We analyse the security of our protocol regarding four aspects, i.e. correctness, fault-tolerance, active attack and passive attack. The comparisons of performance between our protocol and that of Tzeng are also shown. As a whole, the advantage of our protocol is superior to that of Tzeng under the situation where malicious conferees exist.
Motion capture system contextualization
Authors: Francois Picard, Pascal Estraillier
Venue: Proceedings of the 2008 International Conference on Advances in Computer Entertainment Technology (2008)

The notion of contextualization has been introduced in an existing motion capture system driven by the segmented silhouettes of a person filmed from several points of view. The principle is to create a dependence of each module of the process (in this case, the different modules are the motion capture itself, the adaptive background modeling and the silhouette segmentation) from the results of the preceding ones. Thus, the influence of these elements, one with the other, guides locally the different computations. So, this optimization increases the reliability of the whole process while decreasing significantly its processing time. Yet it is obvious that this concept can be applied to several aspects of a motion capture system. As a matter of fact, it is possible to contextualize the captured motion, by modeling the context in which it takes place, allowing to make strong assumptions about the following sequence of movements executed by the filmed person. Thus, by recognizing the current and the next gestures of a captured person, the system can adapt its reactions and evolve with the constantly changing comprehension of the context by the player.
Reliable Mobile Underwater Wireless Communication Using Wideband Chirp Signal
Authors: Chengbing He, Jianguo Huang, Qunfei Zhang, Kaizhuo Lei
Venue: Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 01 (2009)

Acoustic communication between fast-moving underwater vehicles is difficult due to the fact the ratio of the vehicle speed to the sound speed many times exceeds its counterpart in the mobile radio channels. Hence, symbol synchronization, as important as carrier frequency identification, is critical for mobile underwater wireless communication. In this paper, we propose a reliable mobileunderwater wireless communication using wideband chirp signals and a novel symbol self-synchronization method. The use of chirp signals takes advantage of the low Doppler sensitivity as well as their good autocorrelation properties. Several lake experiments and computer simulations have been carried out to verify the proposed system over different distances. Phenomenon of synchronization error accumulation caused by Doppler shift is presented. Our works show that the developed system is able to provide a reliable wireless link between fast-moving underwater vehicles. The achieved data rateis 300 bps with uncoded bit error rate around $10^{-3}$-$10^{-5}$ when the relative speed is as large as 18 m/s (36 knots).
All My People Right Here, Right Now: management of group co-presence on a social networking site
Authors: Airi Lampinen, Sakari Tamminen, Antti Oulasvirta
Venue: Proceedings of the ACM 2009 international conference on Supporting group work (2009)

A mundane but theoretically interesting and practically relevant situation presents itself on social networking sites: the co-presence of multiple groups important to an individual. This primarily qualitative study concentrates on the point of view of individual SNS users and their perspectives on multiple group affiliations. After charting the perceived multiplicity of groups on the social networking site Facebook, we investigated the relevance of multiple groups to the users and the effect of group co-presence on psychological identification processes. Users deal with group co-presence by managing the situation to prevent anticipated conflictive and identity-threatening situations. Their behavioral strategies consist of dividing the platform into separate spaces, using suitable channels of communication, and performing self-censorship. Mental strategies include both the creation of more inclusive in-group identities and the reciprocity of trusting other users and being responsible. In addition to giving further evidence of the existence of group co-presence on SNSs, the study sheds light on the management of the phenomenon. Management of group co-presence should be supported, since otherwise users may feel the urge to resort to defensive strategies of social identity protection such as ceasing to use SNSs altogether or, less dramatically, limit their use according to "the least common denominator". Hence, the phenomenon merits the attention of researchers, developers, and designers alike.
LCS-Hist: taming massive high-dimensional data cube compression
Authors: Alfredo Cuzzocrea, Paolo Serafino
Venue: Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology (2009)

The problem of efficiently compressing massive high-dimensional data cubes still waits for efficient solutions capable of overcoming well-recognized scalability limitations of state-of-the-art histogram-based techniques, which perform well on small-in-size low-dimensional data cubes, whereas their performance in both representing the input data domain and efficiently supporting approximate query answering against the generated compressed data structure decreases dramatically when data cubes grow in dimension number and size. To overcome this relevant research challenge, in this paper we propose LCS-Hist, an innovative multidimensional histogram devising a complex methodology that combines intelligent data modeling and processing techniques in order to tame the annoying problem of compressing massive high-dimensional data cubes. With respect to similar histogram-based proposals, our technique introduces (i) a surprising consumption of the storage space available to house the compressed representation of the input data cube, and (ii) a superior scalability on high-dimensional data cubes. Finally, several experimental results performed against various classes of data cubes confirm the advantages of LCS-Hist, even in comparison with those given by state-of-the-art similar techniques.
A novel fast Kolmogorov's spline complex network for pattern detection
Authors: Hazem M. El-Bakry, Nikos Mastorakis
Venue: Proceedings of the 8th conference on Simulation, modelling and optimization (2008)

In this paper, we present a new fast specific complex-valued neural network, the fast Kolmogorov's Spline Complex Network (FKSCN), which might be advantageous especially in various tasks of pattern recognition. The proposed FKSCN uses cross correlation in the frequency domain between the input data and the input weights of neural networks. It is proved mathematically and practically that the number of computation steps required for the FKSCN is less than that needed by conventional Kolmogorov's Spline Complex Network (CKSCN). Simulation results using MATLAB confirm the theoretical computations.
IPSA: a novel architecture design for integrating IP and sensor networks
Authors: Min Chen, Shiwen Mao, Yang Xiao, Ming Li, Victor C. M. Leung
Venue: International Journal of Sensor Networks (2009)

Recently, there is a growing interest in the design, development and deployment of sensor systems for applications of high-level inference, which leads to an increasing demand on connecting Internet Protocol (IP) network users to wireless sensor networks and accessing the available services and applications. In this paper, we first identify key requirements of designing an efficient and flexible architecture for integrating IP and sensor networks. Based on the requirements, we outline an IP and Sensor Network Integration Architecture (IPSA), which provides IP mobility support and a universal interface for IP mobile users to access sensor networks while considering application-specific requirements. With on-demand processing code assigned to the middleware layer of an IP mobile user, IPSA provides the flexibility for enabling diverse applications and manages network resources efficiently without additional requirements on sensor nodes, except for the limited additional hardware requirement at IP mobile nodes.
Analytic modeling of network processors for parallel workload mapping
Authors: Ning Weng, Tilman Wolf
Venue: ACM Transactions on Embedded Computing Systems (TECS) (2009)

Network processors are heterogeneous system-on-chip multiprocessors that are optimized to perform packet forwarding and processing tasks at Gigabit data rates. To meet the performance demands of increasing link speeds and complex network applications, network processors are implemented with several dozen embedded processor cores and hardware accelerators that run multiple packet processing applications in parallel. The parallel nature of the processing system makes it increasingly difficult for application developers to understand and manage resources and map processing tasks to the hardware. To address this problem, we present a methodology for profiling and analyzing network processor applications, mapping processing tasks to a generalized network processor architecture, and analytically determining the expected throughput performance. The key novelty of this work is not only the adaptation of application analysis and mapping algorithms to heterogeneous network processors, but also that the entire process can be automated and hidden from the application developer. Starting with the analysis of a uniprocessor implementation of the application, the process yields a mapping of the partitioned application that shows best performance for a given network processor system. The simplicity of the proposed randomized mapping algorithm allows the use of this methodology in network processor runtime systems where dynamic reallocation of tasks is necessary but processing power is limited. We present results that show the effectiveness of the analysis and mapping methodology as well as its application to design space exploration.
JSYS traps: a TENEX mechanism for encapsulation of user processes
Authors: Robert H. Thomas
Venue: Proceedings of the May 19-22, 1975, national computer conference and exposition (1975)

The JSYS Trap mechanism is an extension to the TENEX operating system which enables a process to define and control the virtual machine seen by other processes. Using the mechanism, a process can control the execution environment of other processes by providing them with a virtual machine that enlarges, restricts or completely redefines the "standard" virtual machine provided by TENEX.
Research on Speed Robustness for Airborne Hydraulic Pump in the Circular Stress Accelerated Life Test
Authors: Yong Sang, Zhanlin Wang
Venue: Proceedings of the 2009 International Asia Conference on Informatics in Control, Automation and Robotics (2009)

According to the theory of the accelerated life test, a new accelerated life testing stand for airborne hydraulic pump has been developed recently. During the testing under the circular stress, Speed character of the airborne hydraulic pump accompanied with vibration and noise of the gear box has become worse because gear backlash that often leads to collision in gear transmission is always existed in the gear meshing. Dynamic behavior of gear transmission collision has been analyzed after the theory of the circular stress has been introduced. In order to reduce the impact on the speed the airborne hydraulic pump, a single neuron self-adaptive PID controller and a load torque observer have been projected. The research results show that this method is indeed improving speed robustness for airborne hydraulic pump.
Model based reactive planning and prediction for autonomic systems
Authors: Peter H. Deussen
Venue: Proceedings of the 2007 Workshop on INnovative SERvice Technologies (2007)

Dynamic adaptation according to situational variety requires the employment of planning algorithms for reactive and proactive dealing with detected or predicted conditions. The complexity of large scaled, distributed systems however prohibits planning strategies acting on the granularity of single components because (a) a local system view from the perspective of singular components is usually not sufficient, and (b) the synthesis (or a-priory definition) of a global perspective is far beyond feasibility. We therefore propose the use of dynamic abstraction mechanisms to generate planning models of a suitable degree of granularity. The framework of Abstract Interpretation is used to define both a reactive planning algorithm and a pro-active prediction.
HIDE: heterogeneous information DE-identification
Authors: James Gardner, Li Xiong, Kanwei Li, James J. Lu
Venue: Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology (2009)

While there is an increasing need to share data that may contain personal information, such data sharing must preserve individual privacy without disclosing any identifiable information. A considerable amount of research in the data privacy community has been devoted to formalizing the notion of identifiability with many techniques for anonymization, but is focused exclusively on structured data. On the other hand, efforts on de-identifying medical text documents in the medical informatics community are highly specialized for specific document types or a subset of identifiers. In addition, they rely on simple identifier removal or grouping techniques and do not take advantage of the research developments in the data privacy community. We developed an integrated system, HIDE, for Heterogeneous Information DE-identification including structured and unstructured data utilizing existing anonymization techniques. We demonstrate a prototype of our system and show the effectiveness of our approach through a set of real data augmented with synthesized data.
Recent advances in 2+1-dimensional simulations of the pattern-forming Kuramoto-Sivashinsky equation
Authors: Peter Blomgren, Antonio Palacios, Scott Gasner
Venue: Mathematics and Computers in Simulation (2009)

We present an overview of recent advances in numerical simulations of the 2+1-dimensional Kuramoto-Sivashinsky equation, describing the flame-front deformation in a combustion experiment. Algorithmic development includes a second-order unconditionally A-stable Crank-Nicolson scheme, using distributed approximating functionals (DAFs) for well-tempered, highly accurate, representation of the physical quantity and its derivatives. The simulator reproduces a multitude of patterns observed in experiments-in-the-wild, including rotating 2-cell, 3-cell, hopping 3-cell, stationary 2, 3, 4, 5-cell, stationary 5/1, 6/1, 7/1, 8/2 two-ring patterns, etc. The numerical observation of hopping flame patterns - characterized by non-uniform rotations of a ring of cells, in which individual cells make abrupt changes in their angular positions while they rotate around the ring - is the first outside of physical experiments. We show modal decomposition analysis of the simulated patterns, via the singular value decomposition (SVD), which exposes the spatio-temporal behavior in which the overall temporal dynamics is similar to that of equivalent experimental states. Symmetry-based arguments are used to derive normal form equations for the temporal behavior, and a bifurcation analysis of the associated normal form equations quantifies the complexity of hopping patterns. Conditions for their existence and their stability are also derived from the bifurcation analysis. Further, we study the effects of thermal noise in a stochastic formulation of the Kuramoto-Sivashinsky equation. Numerical integration reveals that the presence of noise increases the propensity of dynamic cellular states, which seems to explain the generic behavior of related laboratory experiments. Most importantly, we also report on observations of certain dynamic states, homoclinic intermittent states, previously only observed in physical experiments.
Investigation of nanosize waveguide and nanofiber coupler
Authors: G. H. Wang, P. Shum, G. B. Ren, X. Yu, J. J. Hu
Venue: Proceedings of the 2008 International Conference on Advanced Infocomm Technology (2008)

Long interaction region coupler and racetrack resonator constructed by nanosize waveguide and nanosize optical fiber are investigated. Several components are investigated separately by using theoretical methods or simulation methods. For planar waveguide and coupler, analytical solution of parallel waveguides pair is investigated, by solving Maxwell equation, instead of weakly guiding approximation. The input field is distributed onto the complete set of solutions of the coupler super-modes, which propagate separately inside coupler. At the output port, the superposition of each mode is directly related with the coupler output. The field distribution at the output of parallel waveguides pair is calculated theoretically. After verified the method, for nanofiber, the propagation constant is got by numerical simulation, and then the nanofiber coupler could be investigated as the same way. Based on the analysis of coupler, the racetrack resonator could be investigated.
Translating social support practices into online services for family caregivers
Authors: Matthieu Tixier, Gérald Gaglio, Myriam Lewkowicz
Venue: Proceedings of the ACM 2009 international conference on Supporting group work (2009)

The aim of our ongoing research project is to design a platform for family caregivers to help them cope with the burden of daily caregiving. With a view to designing relevant information and communication services, we analyzed the social support practices observed among the members of a group of caregivers, whose spouses were suffering from Alzheimer's disease. Based on interviews and a field survey, we characterized this collective and identified the caregivers' latent and expressed needs. Our approach consists in linking these needs to naturally occurring situations in order to translate them into meaningful functionalities.
CSbots: design and deployment of a robot designed for the CS1 classroom
Authors: Tom Lauwers, Illah Nourbakhsh, Emily Hamner
Venue: ACM SIGCSE Bulletin (2009)

We present CSbots, an ongoing program to use robots as educational tools in the Introduction to Computer Science CS1) course. We aim to use robotics to improve learning and retention by altering course work so that it is more relevant to students. In our development process we use an iterative cycle composed of design, pilot, and evaluation steps. We have completed the first of these cycles, the alpha cycle, and describe the robot hardware, software, and curriculum development processes as well as key evaluation results from pilots conducted at two community colleges in Fall 2007. We discuss the implications of these results and our experiences on the in-progress beta design cycle and planned pilots.
Towards a design space explorer for media facades
Authors: Peter Dalsgaard, Kim Halskov, Rune Nielsen
Venue: Proceedings of the 20th Australasian Conference on Computer-Human Interaction: Designing for Habitus and Habitat (2008)

Collaborative design projects are often complex affairs in which a number of resources, concerns, and sources of inspiration are brought into play in the shaping of future design concepts. This paper presents the Design Space Explorer, a framework for managing these multiple sources of information and domain concerns in collaborative design projects. The Design Space Explorer captures and gives an overview of design materials and forms, domain locations and situations, interaction styles, and content types. Furthermore, it provides a platform for designers to combine these aspects into scenarios for design concepts. We present and discuss the use of the Design Space Explorer in two specific design cases in the domain of interactive media fa&ccedil;ades, part of the emerging field of digital urban living.
Disruptive technology: How Kodak missed the digital photography revolution
Authors: Henry C. Lucas,  Jr., Jie Mein Goh
Venue: The Journal of Strategic Information Systems (2009)

The purpose of this paper is to analyze how a firm responds to a challenge from a transformational technology that poses a threat to its historical business model. We extend Christensen's theory of disruptive technologies to undertake this analysis. The paper makes two contributions: the first is to extend theory and the second is to learn from the example of Kodak's response to digital photography. Our extensions to existing theory include considerations of organizational change, and the culture of the organization. Information technology has the potential to transform industries through the creation of new digital products and services. Kodak's middle managers, culture and rigid, bureaucratic structure hindered a fast response to new technology which dramatically changed the process of capturing and sharing images. Film is a physical, chemical product, and despite a succession of new CEOs, Kodak's middle managers were unable to make a transition to think digitally. Kodak has experienced a nearly 80% decline in its workforce, loss of market share, a tumbling stock price, and significant internal turmoil as a result of its failure to take advantage of this new technology.