Computer Art Laboratory, Annual Review 2009, The University of Aizu

Annual Review 2009 > Computer Art Laboratory

Computer Art Laboratory


Michael Cohen Professor	Wai Man Pang Assistant Professor	H. Nicholas Nagel Visiting Researcher

Most of the courses taken by engineers and computer science students emphasize scientific discipline and the accumulation of “truth. EThe Computer Arts Lab. activities include such technically objective factors, but also encourage original expression, subjectively motivated by æsthetics rather than “correctness, Esometimes “putting the art before the course! EUnlike many other labs Eactivities that try to converge on a “right answer Esharable by everyone else, artistic disciplines encourage originality, in which the best answer is one that is like no one else’s.

The Computer Arts Lab., through its resident Spatial Media Group,1 is researching projects including practical and creative applications of virtual reality and mixed (augmented, enhanced, hybrid, mediated) reality and virtuality; panoramic interfaces and spatially-immersive displays (especially stereotelephonics, spatial sound, and stereography); wearable and mobile applications, computing, and interfaces; and networked multimedia, with related interests in cve (collaborative virtual environments), groupware and cscw (computer-supported collaborative work); hypermedia; digital typography and electronic publishing; force-feedback displays; telecommunication semiotics (models of teleconferencing selection functions); information furniture; way-finding and navigation (including using a Segway personal transporter); entertainment computing; ubicomp (ubiquitous computing), calm (ambient), and pervasive technology. We are particularly interested in narrowcasting commands, conference selection functions for adjusting groupware situations in which users have multiple presence, virtually existing in more than one space simultaneously. We explore realtime interactive multimedia interfaces Eauditory, visual, haptic, and multimodal:

Auditory We are exploring interfaces for multichannel sound, including stereo, quadraphonic, and nearphones (mounted on ourSc haire rotary motion platform), as well as two separate speaker array systems in the University-Business Innovation Center 3d Theater.A permanent installation there of the Helical Keyboard,2 refined and extended by Juli´an Villegas and featuring realtime visual music with spatial sound and stereographic graphics, is on permanent exhibition. Working with Dr. Durand Begault of NASA, we deployed online courseware, “Sonic, E organizing an introduction to desktop audio and presenting many sound samples. We use these contents in the “Intro. to Sound and Audio Egraduate school course,4 which is a prerequisite for “Spatial Hearing and Virtual 3D Sound, E taught jointly with Prof. Jie Huang in the Human Interface Lab.
With Profs. Robert Fujii and Satoshi Nishimura, we host a Computer Music Studio, featuring about fifteen computer music workstations Eeach comprising a personal computer (Windows and Macs) with sequencing software and a keyboard synthesizer Eplus assorted amplifiers, racks, mixers, and effects processors. Ongoing student projects explore dynamic microtuning systems, and visual music.
We annually conduct a Student Cooperative Class Project.6 In the past we sponsored sccps on Digital Compositing (using Photoshop and the Gimp7), but in recent years the sccp has been focused on Computer Music,8 studying basic music theory and dtm (desk-top music) software, including samplers and midi sequencers 9 to compose and perform student-authored songs.10 This sccp segues into a graduate level computer music course.11

Visual We promote creative applications of scientific visualization, encouraging the use of Mathematica12 and stereoscopy,13 including chromastereoscopy14 (3d images with depth layers cued by color). We enjoy exploiting the unique large-format immersive stereographic display in the Ubic 3d Theater. We are experimenting with various cad authoring tools, such as 3DStudioMax, Blender, Maya, Sketch-Up and encourage “M-Project, Ea student-run cad circle. Various group members are exploring the application of cad techniques to the design and animation of exotic fashions, or the construction of a model of the university from photographs. We are also exploring creative applications of panoramic imaging and object movies,15 including a virtual tour of the university,16 compiled by Mamoru Ishikawa.

Haptic We are also exploring the use of haptic interfaces, including force-display joysticks and a rotary motion platform (the “Schaire [for Ehared chair’] Internet Chair E. A recently finished project uses the Sudden Motion Sensor in a laptop as a gyroscopic control of avatars in a virtual environment.17 We also convene annual Creative Factory Seminars. Past cfss explored advanced audio interfaces and panoramic imaging, but in recent years, in conjunction with Prof. Rentaro Yoshioka of the Distributed and Parallel Processing Lab., we conduct a workshop on Haptic Modeling and 3d Printing, using force-feedback cad workstations18 to make models that are then rapid prototyped (as stereolithograms) with the dppl’s personal fabricator,19 closing the “idea (stored in brain neurons) Einformation (stored as bits) Ematter (atoms) Epathway.

MultimodalUsing such multimodal interfaces, our students have crafted driving simulators, location-based games featuring the rotary motion platform20 and synæsthetic (cross-sensory modality) visual and haptic music players (rendering songs as light shows21 or dancing chairs22). Using visual sensing techniques,23 narrowcasting postures can be recognized, and used to control distributed chatspaces or virtual concerts. A recent student project deployed a microphone vector to track a moving sound source, using its network interface to trigger internet appliances (like lights that follow the source). We are also developing a driving simulator using collision-detection modulation of the force-feedback steering wheel and the rotary motion platform. A recent version of the project features a dual-steering (front and back) fire truck, racing through a 3d model of our campus to reach a fire, piloted by two drivers, and featuring spatial sound effects. We are interested in exploring using figurative interfaces to express emotion and to control narrowcasting privacy using a media mixing system based on the Session Initiation Protocol for advanced conferencing features. We are also exploring extensions of Project Wonderland, 24 an open-source framework for developing virtual reality environments. This year, group members have developed windshield wipers that dance, featuring beat detection, a digital phase-locked loop, and articulated wiper gestures.25

We are also exploring mobile (nomadic, portable) computing, working in conjunction with university spin-offs The Designium,26 Eyes, JAPAN,27 and GClue.28 Such keitai-based interfaces can be used to design kaleidoscopic “wallpaper Escreen savers, or to control internet appliances, panoramic imaging, spatial sound, or motion platforms. An exciting project combines spatial sound with way-finding, using gps tracking, the Segway personal transporter,29 and directional transfer functions.

Other activities:

We host an annual symposium, the Int. Symposium on Spatial Media,30 inviting experts to share their knowledge and passion regarding such themes as “Spatial Sound and Spatial Telepresence E( E1), “Magic in Math and Music E( E2), “Advanced Multimedia and Virtual Reality E( E3), “Spatial Sound E( E4), “Hearing and Sound Installations E( E5), “Sound, Audio, and Music E( E6), “Interactive Media, Security, and Stereography E( E6), “Music XML and the Structure of Swing, Understanding Color Media, Media Grid, and Visualization Tools E( E7), “Multimedia Computing E( E8), and “Systems and Applications E( E9- E0).

Our lab sponsors several student performance circles, including the Yasakoi Dance Circle,31 Disco Mix Club, and Project Mermaid. We also sponsor a couple of other student circles, the Dual Boot (Ultimate Frisbee) Flying Disc Club,32 and the Furiten Mah Jongg Circle.

Through the research & development, the deployment & integration, of stereographic, spatial sound, haptic, and mobile applications, including virtual and mixed reality, we nurture scientific and artistic interest in advanced computer–human and human–human communication. Our ultimate domain is the exploration of interfaces and artifacts that are literally sensational.

Some relevant links:

Audio Courseware: http://sonic.u-aizu.ac.jp
Spatial Media: http://sonic.u-aizu.ac.jp/spatial-media/Videos/cohea.html

English:

Japanese:

Multimedia and Virtual Reality Videos: http://sonic.u-aizu.ac.jp/ spatial-media/Videos

Mobile control of rotary motion platform:

Dual Driving Simulator:

“VMP My Ride E

Mixed Reality Videos:http://sonic.u-aizu.ac.jp/spatial-media/mixedreality/ VideoClips

Cluspi Control of Rotary Motion Platform:

Sudden Motion Sensor Control of Collaborative Virtual Environment:

QuickTime Virtual Reality:http://sonic.u-aizu.ac.jp/spatial-media/QTVR/ VideoClips

U. of Aizu Panorama:

Object Movie:

Hideo Noguchi + Akabeko:http://sonic.u-aizu.ac.jp/spatial-media/QTVR/ Noguchi+Akabeko.mov
Rotational Degrees of Freedom:http://sonic.u-aizu.ac.jp/spatial-media/ QTVR/Rotational-DsoF.mov

Refereed Journal Papers

[mcohen-01:2009]	Owen Noel Newton Fernando, Michael Cohen, Uresh Chanaka Dumindawardana, and Makoto Kawaguchi. Duplex Narrowcasting Operations for Multipresent Groupware Avatars on Mobile Devices. IJWMC: Int. J. of Wireless and Mobile Computing (Special Issue on Mobile Multimedia Systems and Applications), 4(2), 2009.
	issn 1741-1084, 1741-1092; www.inderscience.com/browse/index.php?journalID =46&year=2009&vol=4% &issue=2
[mcohen-02:2009]	Mohammad Sabbir Alam, Michael Cohen, Juli´an Villegas, and Ashir Ahmed. Narrowcasting for Articulated Privacy and Attention in SIP Audio Conferencing. JMM: J. of Mobile Multimedia (Special Issue on Multimedia Networking and Applications), 5(1):12 E8, 2009.
	http://www.rinton.net/xjmm5/jmm-5-1/012-028.pdf
[wmpang-01:2009]	Wai-Man Pang Kup-Sze Choi Pheng-Ann Heng Jing Qin, Yim- Pan Chui. Learning Blood Management in Orthopedic Surgery through Gameplay. IEEE Computer Graphics and Applications, pages 45 E7, March/April 2010.
	Orthopedic surgery treats the musculoskeletal system, in which bleeding is common and can be fatal. To help train future surgeons in this complex practice, researchers designed and implemented a serious game for learning orthopedic surgery. The game focuses on teaching trainees blood management skills, which are critical for safe operations. Using state-of-the-art graphics technologies, the game provides an interactive and realistic virtual environment. It also integrates game elements, including task-oriented and time-attack scenarios, bonuses, game levels, and performance evaluation tools. To study the system’s effect, the researchers conducted experiments on player completion time and off-target contacts to test their learning of psychomotor skills in blood management.

Refereed Proceeding Papers

[mcohen-04:2009]	Rasika Ranaweera, Nicholas Nagel, and Michael Cohen. Wonderland ECve Bridge. In Proc. HC-2009: 12th Int. Conf. on Humans and Computers, pages 174 E79, Hamamatsu, Japan, dec 2009.
	isbn 978-4-900721-01-2, “Cluspi Eis a watermarking system capable of yielding rectangular coordinates and orientation when a camera captures a section of appropriately printed material. We have deployed cluspi-encoded materials, starting with panoramic photographs, as an affordance to our locally-developed multimodal display suite. Because of the cyclic graphical nature (2d depthlessness) of a “pano, Eit can be displayed just as easily, if somewhat unnaturally, inside-out. In particular, such panos can be printed on cluspi-watermarked background and mounted on a cylindrical accessory, a conveniently sized light-weight manipulable, about the size of a can or bottle. Since the cluspi codes are subtle, they do not interfere with watermarked panos. We experiment with cluspi encoding as a tangible interface for virtual tour applications, especially when deployed in conjunction with a multimodal interface suite featuring panoramic browsing, spatial sound, optional stereographic display, and rotary motion platform.
[mcohen-05:2009]	Michael Cohen, Norbert Gy˝orbir´o, and Kamen Kanev. Print-based Interfaces for Mulitmodal Virtual Tours ECryptosteganographic affordances for multimodal interfaces and immersive experiences. In Proc. HC-2009: 12th Int. Conf. on Humans and Computers, pages 26 E2, Hamamatsu, Japan, dec 2009.
	isbn 978-4-900721-01-2, “Cluspi Eis a watermarking system capable of yielding rectangular coordinates and orientation when a camera captures a section of appropriately printed material. We have deployed cluspi-encoded materials, starting with panoramic photographs, as an affordance to our locally-developed multimodal display suite. Because of the cyclic graphical nature (2d depthlessness) of a “pano, Eit can be displayed just as easily, if somewhat unnaturally, inside-out. In particular, such panos can be printed on cluspi-watermarked background and mounted on a cylindrical accessory, a conveniently sized light-weight manipulable, about the size of a can or bottle. Since the cluspi codes are subtle, they do not interfere with watermarked panos. We experiment with cluspi encoding as a tangible interface for virtual tour applications, especially when deployed in conjunction with a multimodal interface suite featuring panoramic browsing, spatial sound, optional stereographic display, and rotary motion platform.
[mcohen-06:2009]	Rasika Ranaweera, Michael Cohen, Nick Nagel, and Michael Frishkopf. (Virtual [World) Music]: Virtual World, World Music EFolkways in Wonderland. In Yoiti Suzuki, Douglas Brungart, Hiroaki Kato, Kazuhiro Iida, Densil Cabrera, and Yukio Iwaya, editors, Proc. IWPASH: Int. Wkshp. on the Principles and Applications of Spatial Hearing, Zao, Miyagi; Japan, nov 2009.
	isbn 978-981-4299-31-2, http://eproceedings.worldscinet.com/9789814299312 /9789814299312.shtm%l. As immersive virtual environments and online music networks become increasingly popular, it behooves researchers to explore their convergence: groupware music browsers populated by figurative avatars. Collaborative virtual environments (CVEs), like Second Life, offer immersive experiential network interfaces to online worlds and media. We are developing a virtual environment, based on and similar to a “Music in Wonderland Eproof-of-concept provided by Sun Microsystems, that enable a place that avatar-represented users can go to browse musical databases. At first this environment will support simple virtual explorations of music, but we have ambitions to map geotags to projected spaces, enabling locationaware browsing. A dome-shaped sphere whose nodes are populated with representative album art is an attractive idiom, since it leverages against our natural spatial intuition and experience, but allows a large number of samples to be scalably displayed and juxtaposed. A user “teleports Einto this dome, and can browse data in multiple fashions.
[mcohen-07:2009]	Michael Cohen and Norbert Gy˝orbir´o. Mobile Narrowcasting Spatial Sound. In Yoiti Suzuki, Douglas Brungart, Hiroaki Kato, Kazuhiro Iida, Densil Cabrera, and Yukio Iwaya, editors, Proc. IWPASH: Int. Wkshp. on the Principles and Applications of Spatial Hearing, Zao, Miyagi; Japan, nov 2009.
	eisbn 978-981-4299-31-2, http://eproceedings.worldscinet.com/9789814299312 /9789814299312.shtm%l, Features integrated into mobile phones are increasing in both quantity and quality. Audio capabilities started with monaural sound, but some recent models include 3D spatial sound rendering. This rapid development enables novel applications for mobile users. We introduce a software framework for mobile audio which provides creation of spatialized sound. Virtual presence is supported in the form of avatars with controllable attendance and privacy features. Utilizing this framework, a mobile musical concert application is presented with a customizable configuration of the soundscape. We have designed and implemented a mobile telephone interface for controlling spatial audio features. Mosaic (an acronym for MObile Spatial Audio Interface andControl) is developed in DoJa, the Java environment for NTT DoCoMo’s i-mode mobile phones.
[mcohen-08:2009]	Juli´an Villegas and Michael Cohen. Mapping topological representations of musical scales onto virtual 3D spaces. In YˁEiti Suzuki, Douglas Brungart, Hiroaki Kato, Kazuhiro Iida, Densil Cabrera, and Yukio Iwaya, editors, Proc. IWPASH: Int. Wkshp. on the Principles and Applications of Spatial Hearing, Zao, Miyagi; Japan, nov 2009.
	eisbn 978-981-4299-31-2, http://eproceedings.worldscinet.com/9789814299312 /9789814299312.shtm%l, We have developed a Collaborative Virtual Environment (CVE) client that allows one to directionalize audio streams using a Head-Related Transform Function (HRTF) filter. The CVE is a suite of multimedia and multimodal clients, mostly authored in Java by members of our laboratory, for sharing information regarding location and position of virtual objects among several applications. This new client has been deployed in conjunction with the Helical Keyboard, an interactive installation displaying three-dimensional musical scales aurally and visually, to offer a more realistic user experience and musical immersion. The new CVE client allows spatialization of audio sources with elevations between -40 degrees to +90 degrees and azimuths between 0 and 355 degrees. In this fashion we could overcome previous limitations on the auditory display of our objects, for which we usually displayed only azimuth.
[mcohen-09:2009]	Michael Cohen, Juli´an Villegas, Mamoru Ishikawa, Akira Inoue, Hiromitsu Sato, Hiroki Tsubakihara, and Jun Yamadera. “VMP My Ride E windshield wipers that swing. In Proc. Asiagraph, volume 3, pages 126 E30, Tokyo, oct 2009.
	isbn 978-4-904490-01-3, http://www.asiagraph.jp, “VMP E(pronounced /vimp/) is acronymic for ‘Visual Music Player, Ea synthetic audio-visual renderer. Inspired by the hit TV show “Pimp My Ride, Ein which cars are outrageously customized, we recast the windshield wipers of an automobile with advanced multimedia technology, allowing wipers to dance to music. We have programmed a beat detector using “Pure Data. EThis musical beat signal is filtered to drive a phase-locked loop (PLL), which triggers choreographed, articulated gestures in virtual, actual, and model windshield wipers. We use a cyclic buffer to implement a moving (“windowed E average, effectively a low-pass filter of inter-event intervals, a digital phase-locked loop (DPLL) used to propel the selected rhythm. A choreography module articulates the wiper sweeping gesture, mapping the DPLL beats into segmented gestures used to drive windshield wipers in three varieties: virtual, through a driving simulator; real, pulsing a standard wiper motor; and miniaturized, through a stepping-motor actuated model wiper. The driving simulator, implemented in Java3D, renders the virtual gestures. Mechatronic interfaces use signals generated by the DPLL to trigger the physical wiper cycles; signals sent via USB to custom circuits driving Peripheral Interface Controllers motivate the motors.
[mcohen-10:2009]	Michael Cohen, Juli´an Villegas, Mamoru Ishikawa, Akira Inoue, Hiromitsu Sato, Hiroki Tsubakihara, and Jun Yamadera. ArTech: “VMP My Ride E windshield wipers that swing. In Proc. Asiagraph, volume 3, page 144, Tokyo, oct 2009.
	isbn 978-4-904490-01-3, http://www.dcexpo.jp/exhibition/asiagraph.html, Instead of adding to the driving cacophony, windshield wipers can enhance musical audition, reinforcing a beat by hiding their cabin noise in the rhythm, increasing the signal:noise ratio by increasing the signal and masking the noise, providing “visual music, Ethe dance of the wipers, as a welcome side-effect. We have implemented such a visual music player, which takes an arbitrary musical source and renders its beats as pulses of windshield wipers, both virtual and real. “VMP E(pronounced /vimp/) is acronymic for Visual Music Player, a synæsthetic audio-visual renderer. Inspired by the hit TV show “Pimp My Ride, Ein which cars are outrageously customized, we recast the windshield wipers of an automobile with advanced multimedia technology, allowing the wipers to dance to music.
[mcohen-11:2009]	Senaka Amarakeerthi, Michael Cohen, and Nicholas Nagel. A Speech Emotion-Driven Avatar Animation System for Collaborative Virtual Environments. In Proc. Audio Mostly: A Conference on Interaction with Sound, Glasgow, sep 2009.
	Representing emotions in collaborative virtual environments (cves) is a very important feature to make them realistic. People engage with computer-simulated virtual environments mostly with the aid of keyboard, mouse, voice, and video. Most cves are equipped with avatar systems to represent each user logged into a CVE session. Some avatar systems are capable of expressing some emotions with gestures, postures, and facial expressions. In previous studies, various approaches have been explored to convey emotional states of humans to the computer, including voice, facial movements, and emoticons. This paper discusses a method to extract emotions from the voice of the speaker and animate an avatar to reflect extracted emotions in real-time. The system has been developed in “Wonderland, Ea Java-based open source framework for creating collaborative 3d virtual words. In our prototype, six primitive emotional states Eanger, dislike, fear, joy, sadness, and surprise Ewere considered. An existing emotion classification system, which makes use of short time log frequency power coefficients (lfpc) to represent the speech signals and a discrete hidden Markov model (hmm) as the classifier, was modified to build emotion extraction unit. Extracted emotions were used to activate existing avatar gestures in Wonderland.
[mcohen-12:2009]	Senaka Amarakeerthi, Rasika Ranaweera, Michael Cohen, and Nicholas Nagel. Mapping Selected Emotions to Avatar Gesture. In Proc. IWAC: 1st Int. Workshop on Aware Computing, Aizu-Wakamatsu, Japan, sep 2009. Japan Society for Fuzzy Theory and Intelligent Informatics.
	www.u-aizu.ac.jp/misc/fan09/iwac09.html, Representing emotions in collaborative virtual environments important to make them realistic. To display emotions in such environments, facial expressions of avatars have been previously deployed. A major drawback of such an approach is the difficulty to see facial expressions when an avatar is far away. This paper describes a method to express emotions of avatars by posy postures, as an alternative when facial expressions are not convenient. A prototype was developed in Project Wonderland, a Java-based open source framework of creating collaborative 3d virtual works. Although emotes are not discrete entities, to reduce system complexity, privet exclusive emotions anger, dislike, fear, joy, sadness, and surprise were considered for classification Emotions are input via popular character combination, as used in email and textual chat spaces. These emoticons were mapped to a predefined set of gesture and applied to the Wonderland avatars in realtime.
[wmpang-02:2009]	Wai-Man Pang. An intuitive texture picker. In Proceeding of the 14th international conference on Intelligent user interfaces, pages 365 E68. ACM New York, NY, USA, 2010.
	Color and texture are basic elements in digital graphics. Selection of color with a picker is convenient in many of the image editing softwares. However, more organized and intelligent GUI for texture pattern selection is still missing. In this paper, we attempt to fill this gap with the introduction of several robust techniques in building an intuitive texture picking GUI. By arranging patterns according to their visual similarities, texture picker with plane and circular layout are presented. Additional functionality include content-based texture searching which can quickly find similar patterns of given sample. Preliminary response to the proposed interface is positive in general, while further improvements are required, for example, on building a hierarchy to facilitate high to low level selection for huge amount of texture patterns.

Unrefereed Papers

[mcohen-03:2009]	Juli´an Villegas and Michael Cohen. Exploring Tonal Music Through Operational Research Methodology. JORSJ: J. of the Operations Research Society of Japan, 54(9):554 E62, sep 2009.
	http://www.orsj.or.jp/english/index.html, issn 0030-3674. Two operational research applications in music are presented. Initially, the mapping of musical scales into multi-dimensional topologies is discussed, and the advantages of projecting these structures into simple spaces explained. We also present the Helical Keyboard, an interactive installation displaying three-dimensional musical scales aurally and visually. Subsequently, the problem of minimizing musical dissonance between audio streams in realtime is discussed, and a solution based on local minima search described. Keywords: Mathematical modeling, OR practice, discrete optimization, musical scales, automatic reintonation.
[mcohen-13:2009]	Michael Cohen. Tutorial: Spatial Sound and Entertainment Computing. In ICEC: Int. Conf. on Entertainment Computing, Paris, sep 2009.
[mcohen-14:2009]	Michael Cohen. Narrowcasting, Multipresence, and Autofocus: Advanced Functionality for Next-Generation Conferencing and Chatspaces EFigurative Interface Controlling SIP-Based Media Server. In Aaron Walsh, editor, iED: Immersive Education Initiative London Summit, London, England, apr 2009.

Chapters in Book

[mcohen-15:2009]	Michael Cohen and Owen Noel Newton Fernando. Awareness Systems: Advances in Theory, Methodology and Design, chapter Narrowcasting Attributes for Presence Awareness, pages 259 E89. Human-Computer Interaction Series. Springer, apr 2009.
	Our group is exploring interactive multiand hypermedia, especially applied to virtual and mixed reality multimodal groupware systems.We are exploring user interfaces to control source ↁEsink transmissions in synchronous groupware (like teleconferences, chatspaces, virtual concerts, etc.). The apparent paradoxes of multipresence, having avatars in multiple places or spaces simultaneously, are resolvable by an ‘autofocus Efeature, which uses reciprocity, logical exchangeability of source and sink, to project overlaid soundscapes and simulate precedence effect to consolidate the audio display. We have developed two interfaces for narrowcasting (selection) functions for presence awareness in collaborative virtual environments (CVEs): for a workstation wimp- style (windows/icon/menu/pointer) gui (graphical user interface), and for networked mobile devices, a 2.5and 3rd-generation mobile phones. The narrowcasting operations comprise an idiom for selective attention, presence, and privacy Ean infrastructure for rich computer-supported collaborative work (cscw).
[mcohen-16:2009]	Sabbir Alam, Michael Cohen, Juli´an Villegas, and Ahmed Ashir. Narrowcasting in SIP: Articulated Privacy Control, chapter 14, pages 323 E45. CRC Press: Taylor and Francis, 2009.
	10-isbn 1-4200-6603-X, 13-isbn 978-1-4200-6603-6, http://www.crcpress.com/product/isbn/9781420066036, http://www.amazon.com/SIP-Handbook-Services-Technologies-Initiation/% dp/142006603X/ref=sr 11 1?ie=UTF8&qid=1232693739&sr=11-1, In multimedia conferencing, media streams are exchanged between participants upon session establishment by setting up communication channels within a group. By default, each participant receives a combined stream obtained by mixing other participants Emedia. Situations arise when one wants to select a subset of the conference participants to whom one’s media is sent or from whom streams are received. Media filters are necessary to configure privacy of the participants in the conference. In analogy to broad-, multi-, any-, and swarm-casting, narrowcasting is a technique for limiting and focusing information streams. Narrowcasting systems extend broadand multicasting systems by allowing media streams to be filtered Efor relevancy control, privacy, and user interface optimization. We describe four narrowcasting commands Emute, deafen, select, and attend Eto provide distributed privacy in sip-based conferencing.

Grants

[mcohen-17:2009]

Michael Cohen. Japan Society for Promotion of Science (Kakenhi): “Personal Panoramic Multimodal Interface E 2008 E.

Academic Activities

[mcohen-18:2009]	Michael Cohen, 2009. Program Committee, HC-2009: Twelfth Int. Conf. on Human and Computer (Hamamatsu)
[mcohen-19:2009]	Michael Cohen, 2009 E0. Reviewer and Scientific Committee, J. of Virtual Reality and Broadcasting
[mcohen-20:2009]	Michael Cohen, June 2009. Reviewer, Elsevier Brain Research, http://ees.elsevier.com/bres/
[mcohen-21:2009]	Michael Cohen, June 2009. Reviewer (tertiary), SIGGRAPH Asia Courses, http://www.siggraph.org/asia2009/
[mcohen-22:2009]	Michael Cohen, June 2009. Reviewer, ICMC (Int. Conf. on Computer Music), http://www.icmc2009.org
[mcohen-23:2009]	Michael Cohen, June 2009. Reviewer, FAN2009/IWAC2009, http://web-ext.u-aizu.ac.jp/misc/fan09/fan09-e.html, http://web-ext.u-aizu.ac.jp/misc/fan09/iwac09.html
[mcohen-24:2009]	Michael Cohen, June 2009. Jury, Best Paper Award, Int. Conf. on IT in Asia (CITA09), http://www.cita09.org

Ph.D, Master and Graduation Theses

[mcohen-25:2009]	Thesis Advisor: Michael Cohen
[mcohen-26:2009]	Thesis Advisor: Michael Cohen
[mcohen-27:2009]	Thesis Advisor: Michael Cohen
[mcohen-28:2009]	Thesis Advisor: Michael Cohen
[mcohen-29:2009]	Thesis Advisor: Michael Cohen
[mcohen-30:2009]	Thesis Advisor: Michael Cohen
[mcohen-31:2009]	Thesis Advisor: Michael Cohen
[mcohen-32:2009]	Thesis Advisor: Michael Cohen
[mcohen-33:2009]	Thesis Advisor: Michael Cohen

Others

[mcohen-34:2009]

Michael Cohen. Narrowcasting, Multipresence, and Autofocus: Advanced Functionality for Next-Generation Conferencing and Chatspaces EFigurative Interface Controlling SIP-Based Media Server. Electronic, Electrical, & Computer Engineering, Heriot Watt University (Edinburgh, Scotland); http://www.eeehw.com/Researchers/DeptSeminars/Cohen.php, 1 May 2009.