The Experts below are selected from a list of 804 Experts worldwide ranked by ideXlab platform
Michael Cohen - One of the best experts on this subject based on the ideXlab platform.
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Narrowcasting visualization using particles for spatial sound conferencing
SHS Web of Conferences, 2020Co-Authors: Koki Tsuda, Michael Cohen, Rintarō SatōAbstract:The goal of this study is to visualize duplex auditory communication filtered with Narrowcasting. Narrowcasting is technology that enables media stream filtering for privacy. Audio Narrowcasting has four operations (solo & mute and attend & deafen). In this research, communication from source to sink is determined according to these four operations, including “autofocus” determination of multipresent sinks, and visualized using flying particles. Soundscapes are compiled according to Narrowcasting attributes. With such multimodal representation, users can more easily understand Narrowcasting communication.
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Hierarchical Narrowcasting
Distributed Ambient and Pervasive Interactions, 2015Co-Authors: Michael CohenAbstract:Narrowcasting, in analogy to uni-, broad-, and multicasting, is a formalization of media control functions that can be used to adjust exposure and receptiveness. Its idioms have been deployed in spatial sound diffusion interfaces, internet telephony, immersive chatspaces, and collaborative music audition systems. Here, we consider its application to desk-top music composition systems, using Pure Data "Pd", a dataflow language for audio and multimedia, to develop a proof-of-concept. A hierarchical model of a drum kit is deployed, applying Narrowcasting at various levels of aggregation to drum machine sequences. These ideas can also be extended to audio augmented reality situations.
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Narrowcasting and multipresence for music auditioning and conferencing in social cyberworlds
Presence: Teleoperators and Virtual Environments, 2015Co-Authors: Rasika Ranaweera, Michael Cohen, Michael FrishkopfAbstract:We describe a musical cyberworld, Folkways in Wonderland, in which avatarrepresented users can find and listen to selections from the Smithsonian Folkways world music collection. When audition is disturbed by cacophony of nearby tracks or avatar conversations, one's soundscape can be refined since the system supports Narrowcasting, a technique which allows information streams to be filtered. Our system supports two different kinds of sound sources: musical selections and avatar conversation voice-chat. Narrowcasting for music enables aesthetic focus; Narrowcasting for talk enables cognitive focus. The former is required for dense presentation of musical sound, the latter for virtual worlds in which many avatars are expected to be able to interact. An active listener can fork self-identified avatars using a novel multipresence technique, locating representatives at locations of interest, each clone capturing respective soundscapes, controlled using Narrowcasting functions {self, non-self} × {select solo, mute, deafen, attend} . Likewise one can participate in a conference and at the same time join a global tour of music. Our music browser is architected to use MX: IEEE 1599, a comprehensive, multilayered, music description standard. Using our cyberworld as a virtual laboratory, we evaluated the effectiveness of Narrowcasting when auditioning music and conferencing. Experimental results suggest that Narrowcasting and multipresence techniques are useful for collaborative music exploration and improve user experience. We also got positive feedback from the participants regarding Narrowcasting representations, variously based on colors, symbols, and icons.
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groupware avatars on mobile devices
2011Co-Authors: Michael Cohen, Owen Noel, Newton Fern, Uresh Chanaka Duminduwardena, Makoto KawaguchiAbstract:Narrowcasting operations for multipresen
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Multipresence-Enabled Mobile Spatial Audio Interfaces
2010Co-Authors: Michael Cohen, Owen Noel Newton Fernando, Adrian David CheokAbstract:Mobile telephony offers an interesting platform for building multipresence-enabled applications that utilize the phone as a social or commercial assistant. The main objective of this research is to develop multipresence-enabled audio windowing systems for visualization, attention, and privacy awareness of Narrowcasting (selection) functions in collaborative virtual environments (CVEs) for mobile devices such as 3rd- and 4th-generation mobile phones. Mobile audio windowing system enhances auditory information on mobile phones and encourages modernization of office- and mobile-based conferencing.
Ashir Ahmed - One of the best experts on this subject based on the ideXlab platform.
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Narrowcasting for articulated privacy and attention in SIP audio conferencing
Journal of Multimedia, 2010Co-Authors: Sabbir Alam, Michael Cohen, Julián Villegas, Ashir AhmedAbstract:In traditional conferencing systems, participants have little or no privacy, as their voices are by default shared with all others in a session. Such systems cannot offer participants the options of muting and deafening other members. The concept of Narrowcasting can be applied to make these kinds of filters available in multimedia conferencing systems. Our system treats media sinks (in the simplest case, listeners) as full citizens, peers of the media sources (conversants' voices), and we defined therefore duals of mute & select : deafen & attend, which respectively block a sink or focus on it to the exclusion of others. In this article, we describe our prototyped application, which uses existing standard Session Initiation Protocol (SIP) methods to control fine-grained Narrowcasting sessions. The runtime system considers the policy configured by the participants and provides a policy evaluation algorithm for media mixing and delivery. We have integrated a "virtual reality"-style interface with this SIP backend to display and control articulated Narrowcasting with figurative avatars.
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Articulated Narrowcasting for Privacy and Awareness in Multimedia Conferencing Systems and Design for Implementation Within a SIP Framework
2009Co-Authors: M.s. Alam, Michael Cohen, Ashir AhmedAbstract:JVRB, 5(2008), no. 14. - This article proposes a new focus of research for multimedia conferencing systems which allows a participant to flexibly select another participant or a group for media transmission. For example, in a traditional conference system, participants voices might by default be shared with all others, but one might want to select a subset of the conference members to send his/her media to or receive media from. We review the concept of Narrowcasting, a model for limiting such information streams in a multimedia conference, and describe a design to use existing standard protocols (SIP and SDP) for controlling fine-grained Narrowcasting sessions.
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figurative privacy control of sip based Narrowcasting
Advanced Information Networking and Applications, 2008Co-Authors: M.s. Alam, Michael Cohen, Julián Villegas, Ashir AhmedAbstract:In traditional conferencing systems, participants have little or no privacy, as their voices are by default shared with all others in a session. Such systems cannot offer participants the options of muting and deafening other members. The concept of Narrowcasting can be applied to make these kinds of filters available in multimedia conferencing systems. Our system treats media sinks (in the simplest case, listeners) as full citizens, peers of the media sources (con- versants' voices), and we defined therefore duals of mute & select : deafen & attend, which respectively block a sink or focus on it to the exclusion of others. In this article, we describe our prototyped system, which uses existing standard Session Initiation Protocol (SIP) methods to control fine-grained Narrowcasting sessions. The design considers the policy configured by the participants and provides a policy evaluation algorithm for media mixing and delivery. We have integrated a "virtual reality"-style interface with this SIP backend to display and control articulated Narrowcasting with figurative avatars.
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AINA - Figurative Privacy Control of SIP-Based Narrowcasting
22nd International Conference on Advanced Information Networking and Applications (aina 2008), 2008Co-Authors: M.s. Alam, Michael Cohen, Julián Villegas, Ashir AhmedAbstract:In traditional conferencing systems, participants have little or no privacy, as their voices are by default shared with all others in a session. Such systems cannot offer participants the options of muting and deafening other members. The concept of Narrowcasting can be applied to make these kinds of filters available in multimedia conferencing systems. Our system treats media sinks (in the simplest case, listeners) as full citizens, peers of the media sources (con- versants' voices), and we defined therefore duals of mute & select : deafen & attend, which respectively block a sink or focus on it to the exclusion of others. In this article, we describe our prototyped system, which uses existing standard Session Initiation Protocol (SIP) methods to control fine-grained Narrowcasting sessions. The design considers the policy configured by the participants and provides a policy evaluation algorithm for media mixing and delivery. We have integrated a "virtual reality"-style interface with this SIP backend to display and control articulated Narrowcasting with figurative avatars.
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c ○ Rinton Press Narrowcasting FOR ARTICULATED PRIVACY AND ATTENTION IN SIP AUDIO CONFERENCING
2008Co-Authors: Sabbir Alam, Michael Cohen, Julián Villegas, Ashir AhmedAbstract:In traditional conferencing systems, participants have little or no privacy, as their voices are by default shared with all others in a session. Such systems cannot offer participants the options of muting and deafening other members. The concept of Narrowcasting can be applied to make these kinds of filters available in multimedia conferencing systems. Our system treats media sinks (in the simplest case, listeners) as full citizens, peers of the media sources (conversants ’ voices), and we defined therefore duals of mute & select: deafen & attend, which respectively block a sink or focus on it to the exclusion of others. In this article, we describe our prototyped application, which uses existing standard Session Initiation Protocol (SIP) methods to control fine-grained Narrowcasting sessions. The runtime system considers the policy configured by the participants and provides a policy evaluation algorithm for media mixing and delivery. We have integrated a “virtual reality”-style interface with this SIP backend to display and control articulated Narrowcasting with figurative avatars
Owen Noel Newton Fernando - One of the best experts on this subject based on the ideXlab platform.
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Multipresence-Enabled Mobile Spatial Audio Interfaces
2010Co-Authors: Michael Cohen, Owen Noel Newton Fernando, Adrian David CheokAbstract:Mobile telephony offers an interesting platform for building multipresence-enabled applications that utilize the phone as a social or commercial assistant. The main objective of this research is to develop multipresence-enabled audio windowing systems for visualization, attention, and privacy awareness of Narrowcasting (selection) functions in collaborative virtual environments (CVEs) for mobile devices such as 3rd- and 4th-generation mobile phones. Mobile audio windowing system enhances auditory information on mobile phones and encourages modernization of office- and mobile-based conferencing.
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ICEC - Multipresence-enabled mobile spatial audio interfaces
Lecture Notes in Computer Science, 2010Co-Authors: Owen Noel Newton Fernando, Michael Cohen, Adrian David CheokAbstract:Mobile telephony offers an interesting platform for building multipresence-enabled applications that utilize the phone as a social or commercial assistant. The main objective of this research is to develop multipresence-enabled audio windowing systems for visualization, attention, and privacy awareness of Narrowcasting (selection) functions in collaborative virtual environments (CVEs) for mobile devices such as 3rd- and 4th-generation mobile phones. Mobile audio windowing system enhances auditory information on mobile phones and encourages modernization of office- and mobile-based conferencing.
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Duplex Narrowcasting operations for multipresent groupware avatars on mobile devices
International Journal of Wireless and Mobile Computing, 2009Co-Authors: Michael Cohen, Owen Noel Newton Fernando, Uresh Chanaka Duminduwardena, Makoto KawaguchiAbstract:The apparent paradoxes of multipresence, having avatars in multiple places simultaneously, are resolvable by an 'autofocus' feature, which uses reciprocity to project overlaid soundscapes and simulate the precedence effect to consolidate the display. We have developed an interface for Narrowcasting functions for networked mobile devices deployed in a Collaborative Virtual Environment. Featuring multiple icons in a '2.5D' application, the interface can be used to control motion, sensitivity, and audibility of avatars in a teleconference. The interface is integrated with other clients through a 'servent' (server/client hybrid) HTTP TCP/IP bridge, interoperating with a heterogeneous groupware suite including stereographic panoramic browsers and spatial audio backends and speaker arrays.
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Mobile HCI - Mobile spatial audio interfaces
Proceedings of the 9th international conference on Human computer interaction with mobile devices and services - MobileHCI '07, 2007Co-Authors: Owen Noel Newton Fernando, Michael Cohen, Adrian David CheokAbstract:For an increasing amount of people (especially young people), the mobile phone, and not the computer, is becoming their main media device and portal to the virtual world. Mobile phones have become a ubiquitous technology and for many people an important tool for communication and information access. Mobile telephony offers an interesting platform for building multipresence-enabled applications that utilize the phone as a social or commercial assistant. The main objective of this research is to develop multipresence-enabled audio windowing systems for visualization, attention, and privacy awareness of Narrowcasting (selection) functions in collaborative virtual environments (CVEs) for mobile devices such as 3rd- and 4th-generation mobile phones. Mobile audio windowing system enhances auditory information on mobile phones and encourages modernization of office- and mobile-based conferencing.
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Narrowcasting attributes for presence awareness in collaborative virtual environments
Computer and Information Technology, 2006Co-Authors: Owen Noel Newton Fernando, Michael CohenAbstract:This article describes presence awareness in groupware systems. Presence awareness is rapidly becoming an important component of many collaborative applications. One serious limitation is that no existing presence awareness systems can handle multiply present sources and sinks. The Narrowcasting operations presented this article suggest elegant solution for such multipresence environments. These operations comprise an idiom for selective attention, presence awareness, and privacy-- an infrastructure for rich conferencing capabilities in collaborative virtual environments (CVEs). We have developed two interfaces for Narrowcasting operations and presence awareness in CVEs: for workstation and 2.5- and 3rd-generation mobile phones. Such platform-agnostic deployment of Narrowcasting operations encourages the modernization of office- and mobilebased conferencing, leveraging session integration across coextensive spaces and anticipating multipresence enabled by higher bandwidth and more durable mobile connectivity. Keywords: mobile computing, multiuser interface, Narrowcasting functions, teleconferencing, collaborative virtual environments (CVEs).
Marlou Osinga - One of the best experts on this subject based on the ideXlab platform.
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Narrowcasting: super voor supermarkten?Onderzoek naar de effecten van Narrowcasting op de winkelbeleving en het aankoopgedrag
2010Co-Authors: Marlou OsingaAbstract:Supermarkets try to attract customers to their stores in many different ways. They place ads, send out TV commercials and advertise through brochures and news papers. Once the customer is actually in the supermarket, they are still being influenced and persuaded to certain purchases. For this, supermarkets use various marketing tools. A relatively new in-store marketing tool is Narrowcasting. Narrowcasting means sending promotional messages through audiovisual displays aimed at specific (groups of) customers (Dewan et al, 2002). The advantage of Narrowcasting is the possibility to be up to date while the content on the screens can be controlled real-time. Narrowcasting uses moving images because the attention value of these images is higher then the attention value of static images like billboards (Reeves & Nass, 1996). Narrowcasting could be an interesting marketing tool to influence customers in the store. However, the actual effects of Narrowcasting in supermarkets are unknown because little research has been performed. Therefore the question of this research is: What is the effect of Narrowcasting in a supermarket on the purchase behaviour, the waiting time experience, the overall store image and the store experience of the customer? To answer this question a qualitatively pre-examination and a field investigation have been performed. The pre-examination exists of interviews with experts of Narrowcasting to gain more knowledge about this medium. The effect of Narrowcasting on store image, store experience, purchase behaviour and the waiting time experience has been examined through an experiment with Narrowcasting in a supermarket. In the control condition Narrowcasting was not applied. Both in the condition with and without Narrowcasting a private label candy was promoted. The investigation was performed in a store of Poiesz Supermarkten B.V. in Sneek where customers were asked to answer a questionnaire after they finished their shopping. The results show that Narrowcasting has influence on the buying intent and behaviour of customers. The effect on the purchase intent and purchase behaviour are higher when, at a prominent location in the store, a sales promotion is shown instead of store information. It makes no difference on the purchase intent and purchase behaviour whether, at the cash desk, store information is given or a sales promotion is being shown. Also Narrowcasting proves to be the most effective when store information is being given at the cash desk and a sales promotion is being shown at a prominent location in the store. In this setting the greatest effect on purchase intention and purchase behaviour has been found. Sales figures also support this effect. The sales of the product concerned in this research were almost increased by 400%. The sales volume went up from € 68,68 in the first week (without Narrowcasting) to € 268,49 in the second week (with Narrowcasting). The conclusion that Narrowcasting has influence on store image, store experience and waiting time experience can not be concluded from this research. When applying Narrowcasting, the communication of store information as well as a sales promotion, is recommended. The store information can best be given at the cash desk and the sales promotion can best be given at a prominent location in the store. A requirement is to present the concerned product on the shelf next to the screen on which the promotion is being shown. This enables the customer to acquire the product easily and direct.
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Narrowcasting super voor supermarkten onderzoek naar de effecten van Narrowcasting op de winkelbeleving en het aankoopgedrag
2010Co-Authors: Marlou OsingaAbstract:Supermarkets try to attract customers to their stores in many different ways. They place ads, send out TV commercials and advertise through brochures and news papers. Once the customer is actually in the supermarket, they are still being influenced and persuaded to certain purchases. For this, supermarkets use various marketing tools. A relatively new in-store marketing tool is Narrowcasting. Narrowcasting means sending promotional messages through audiovisual displays aimed at specific (groups of) customers (Dewan et al, 2002). The advantage of Narrowcasting is the possibility to be up to date while the content on the screens can be controlled real-time. Narrowcasting uses moving images because the attention value of these images is higher then the attention value of static images like billboards (Reeves & Nass, 1996). Narrowcasting could be an interesting marketing tool to influence customers in the store. However, the actual effects of Narrowcasting in supermarkets are unknown because little research has been performed. Therefore the question of this research is: What is the effect of Narrowcasting in a supermarket on the purchase behaviour, the waiting time experience, the overall store image and the store experience of the customer? To answer this question a qualitatively pre-examination and a field investigation have been performed. The pre-examination exists of interviews with experts of Narrowcasting to gain more knowledge about this medium. The effect of Narrowcasting on store image, store experience, purchase behaviour and the waiting time experience has been examined through an experiment with Narrowcasting in a supermarket. In the control condition Narrowcasting was not applied. Both in the condition with and without Narrowcasting a private label candy was promoted. The investigation was performed in a store of Poiesz Supermarkten B.V. in Sneek where customers were asked to answer a questionnaire after they finished their shopping. The results show that Narrowcasting has influence on the buying intent and behaviour of customers. The effect on the purchase intent and purchase behaviour are higher when, at a prominent location in the store, a sales promotion is shown instead of store information. It makes no difference on the purchase intent and purchase behaviour whether, at the cash desk, store information is given or a sales promotion is being shown. Also Narrowcasting proves to be the most effective when store information is being given at the cash desk and a sales promotion is being shown at a prominent location in the store. In this setting the greatest effect on purchase intention and purchase behaviour has been found. Sales figures also support this effect. The sales of the product concerned in this research were almost increased by 400%. The sales volume went up from € 68,68 in the first week (without Narrowcasting) to € 268,49 in the second week (with Narrowcasting). The conclusion that Narrowcasting has influence on store image, store experience and waiting time experience can not be concluded from this research. When applying Narrowcasting, the communication of store information as well as a sales promotion, is recommended. The store information can best be given at the cash desk and the sales promotion can best be given at a prominent location in the store. A requirement is to present the concerned product on the shelf next to the screen on which the promotion is being shown. This enables the customer to acquire the product easily and direct.
Suresh K. Nair - One of the best experts on this subject based on the ideXlab platform.
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Narrowcasting of wireless advertising in malls
European Journal of Operational Research, 2007Co-Authors: Arvind K. Tripathi, Suresh K. NairAbstract:Abstract Wireless devices are personal, and the advertiser can schedule ads to reach the prospect at the proper time and place, which makes wireless advertising an ideal direct marketing tool. Industry associations, fearing a backlash from uncontrolled spam, have been careful to emphasize opt-ins. Yet the market has been more promise than reality. In spite of the possibilities of personalization, one of the major complaints has been that the ads are not relevant. Proper targeting and scheduling of wireless ads can go a long way to alleviate this problem. In a recent paper [De Reyck, B., Degraeve, Z., 2003. Broadcast scheduling for mobile advertising. Operations Research 51(4), 509–517] discuss a real implementation of wireless advertising in a shopping mall in London, and provide an integer programming model to schedule ads to various segments of prospects over a week. This model was found to be very effective in increasing response rates without saturating the devices with too many ads. We show in this paper that De Reyck and Degraeve’s model can be made more effective by utilizing information that is readily available to the advertiser. Our test runs show an improvement in the sum of ad priority value of about 150%, depending on the type of traffic in the mall. We provide two enhanced integer programming models that incrementally use additional contact history information to better scheduling of ads. Results from extensive runs are presented and managerial insights discussed.
