世界中学生文摘最新文献

{"title":"Session details: Poster/Demo Session","authors":"","doi":"10.1145/3251621","DOIUrl":"https://doi.org/10.1145/3251621","url":null,"abstract":"","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81229704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multimodal Indoor Social Interaction Sensing and Real-time Feedback for Behavioural Intervention","authors":"A. Montanari","doi":"10.1145/2801694.2801706","DOIUrl":"https://doi.org/10.1145/2801694.2801706","url":null,"abstract":"Social interactions play an important role in people's personal as well as working life. Interactions come in various forms, identifiable mainly by duration and proximity. The ability to detect and distinguish interactions can often shed light over worktask performance, epidemic spreading, personal relationship development, use of space and more. Questionnaires and direct observations have often been used as mechanisms to identify interactions, however, these are either very expensive in terms of staff time, yield very coarse grained information or do not scale. Technology has started cutting costs by allowing automatic detection, however precise interaction identification often requires individuals to wear custom hardware. The aim of my work is to exploit the capabilities of off-the-shelf wearable devices (i.e. smart watches and fitness trackers) to build a social interactions sensing platform which offers accuracy and scalability. To this end, non-verbal behaviours, such as, body language, will be considered in addition to the occurrence of the interactions (individuals involved, duration and location) with the objective of providing unobtrusive real-time feedback.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82082487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poster: SoftNull: All-digital Massive MIMO Full-duplex Wireless","authors":"E. Everett, Clayton W. Shepard, Lin Zhong, A. Sabharwal","doi":"10.1145/2801694.2801716","DOIUrl":"https://doi.org/10.1145/2801694.2801716","url":null,"abstract":"Today’s wireless base stations are half-duplex, meaning that transmission and reception are relegated to separate time slots or separate frequency bands. Data rates would be multiplicatively increased if base stations were full-duplex, meaning they could both transmit and receive at the same time and in the same frequency band. The challenge to fullduplex operation is self-interference: the base station generates high-powered interference to its own receiver, swamping the receiver electronics and preventing the base station from receiving the much weaker uplink signal. Research over the last ten years [1, 2, 3, 4], has shown that full-duplex operation is feasible for small cells. The key enabler of full-duplex has been a combination analog cancellation and digital cancellation of the self-interference [3, 5]. Another promising wireless innovation is massive multipleinput multiple output (“Massive MIMO”), in which the base station uses very large antenna arrays (on the order of hundreds) to communicate with many users simultaneously. The benefit of Massive MIMO is that the beam to each user is very focused, which enables the base station to leverage simple signal processing and mitigates interference between cells [6]. The grand vision for next-generation wireless communication is to combine Massive MIMO and full-duplex in a single system. Full-duplex Massive MIMO brings both new challenges and new opportunities. Challenge: Analog cancellation has been considered necessary to prevent the self-interference from overwhelming the dynamic range of the receiver electronics. However, as the number of antennas grows, the complexity of the hardware required for analog cancellation grows superlinearly. Therefore solutions are needed to suppress self-interference prior to the receiver front end whose analog complexity does not scale with the number of antennas. Opportunity: Massive MIMO also presents a new opportunity for full-duplex. Many antennas provides transmit spatial degrees of freedom that can be leveraged for transmit beamforming to suppress self-interference. However, supPermission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author(s). Copyright is held by the owner/author(s). S3’15, September 11, 2015, Paris, France. ACM ISBN 978-1-4503-3701-4/15/09. DOI: http://dx.doi.org/10.1145/2801694.2801716. pressing self-interference via transmit beamforming requires sacrificing transmit dimensions that could have been leveraged for reaffirming to the downlink users. In particular, for receive antenna that is nulled, a transmit dimension (i.e. a virtual transmit antenna) must be sacrificed. Proposed Solution: We consider removing ","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83799487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A PS Queue Model for Lte Macrocells Taking into Account Mobility of Users","authors":"N. Nya, B. Baynat","doi":"10.1145/2801694.2801708","DOIUrl":"https://doi.org/10.1145/2801694.2801708","url":null,"abstract":"In this paper we analyze the performance of mobile users in a LTE macrocell with different transmission zones. To this end, we develop a simple model based on a muticlass Processor Sharing queue, that captures mobility of users between zones through the distribution of the sojourn time a user stays in each zone. The originality of the model is to decouple the mobility model from the cell model itself, by relating both the input rates and the service rates of the PS queue to performance parameters. The unknowns of the underlying system are thus solution of a fixed-point iterative technique. We compare the cell performance obtained by the model to simulation and show the accuracy of the solution. We believe that this very encouraging result will be the starting point of numerous extensions.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89636971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving Connectivity, Coverage, and Capacity in 60 GHz Indoor WLANs Using Relays","authors":"S. K. Saha, Li Sun, Dimitrios Koutsonikolas","doi":"10.1145/2801694.2804446","DOIUrl":"https://doi.org/10.1145/2801694.2804446","url":null,"abstract":"60 GHz technology, standardized by IEEE 802.11ad, has emerged as an alternative to 2.4/5 GHz legacy WiFi for building multi-Gigabit general purpose home/enterprise WLANs. However, limited range and high vulnerability to blockage of millimeter-wave (mmWave) links can severely affect WLAN performance. These problems coupled with long re-connection time for a broken link pose a major challenge to the realization of 60 GHz WLANs. In this work, we look at the relay architecture defined in the 802.11ad standard as a solution to these issues and propose extensions to it for achieving gains in both WLAN coverage and capacity.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88173171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trustworthy Device Pairing for Opportunistic Device-to-Device Communications in Mobile Crowdsourcing Systems","authors":"Cong Zhao, Fengrui Shi, Ran Huang, Xinyu Yang, J. Mccann","doi":"10.1145/2801694.2801705","DOIUrl":"https://doi.org/10.1145/2801694.2801705","url":null,"abstract":"Mobile Crowdsourcing System is an emerging service paradigm base on numerous personal smart devices, where the Device-to-Device communication among opportunistically encountered participating devices is an indispensable part of task allocation, file transmission and data collaboration. Considering that participating devices are privately held and opportunistically encountered, we design the Trustworthy Device Pairing (TDP) scheme that realizes user-transparent sharing secret key negotiation and reliable peer device determination for trustworthy spontaneous D2D transactions. TDP is demonstrated to be effective based on our proof-of-concept implementation, and a further evaluation on efficiency will be conducted.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77999539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Live Adaptations of Low-power MAC Protocols","authors":"Georgios Z. Papadopoulos, A. Gallais, G. Schreiner, Thomas Noël","doi":"10.1145/2801694.2801700","DOIUrl":"https://doi.org/10.1145/2801694.2801700","url":null,"abstract":"This article aims at observing in an interactive manner the impact of modification of preamble and sampling periods at the low-power family of MAC protocols, and thus, illustrating in real-time the energy consumption and delay performance of each node accordingly. To do so, we implemented the ability for users to generate traffic at some remote nodes that are involved in two distinct deployed topologies. Those deployed networks operate with either a statically configured network, by employing X-MAC on top of the Contiki OS, or T-AAD, a lightweight traffic auto-adaptive protocol that allows live and automatic modifications of duty-cycle configurations.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80278788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proceedings of the 2015 Workshop on Wireless of the Students, by the Students, & for the Students","authors":"Puneet Jain, Petko Georgiev","doi":"10.1145/2801694","DOIUrl":"https://doi.org/10.1145/2801694","url":null,"abstract":"It is our great pleasure to welcome you to the 2015 Wireless of the Students, by the Students, for the Students Workshop -- S3'15. This year's workshop continues the tradition of providing a unique forum for students in all types of mobile and wireless research --- from theory to practice and everywhere in between -- to freely exchange ideas in a student-centric venue. The mission of the workshop is to foster early-career development among students and expose them to an academic life, providing a venue for exchanging ideas and experience organizing and running a workshop. \u0000 \u0000S3 has traditionally featured invited papers, posters, and demos from students around the world. This year, we received submissions from Asia, Europe, and the United States. The program covers a variety of wireless topics, from localization to network performance to mobile applications and more. In addition, the program includes a panel on early-career research in industry and academia and two keynote speeches from academic and industry leaders.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76562440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Demo: Cloud-based Security as a Service for Smart IoT Environments","authors":"I. Hafeez, A. Ding, Lauri Suomalainen, Seppo Hätönen, Valtteri Niemi, S. Tarkoma","doi":"10.1145/2801694.2802140","DOIUrl":"https://doi.org/10.1145/2801694.2802140","url":null,"abstract":"We demonstrate the first cloud-based solution for providing network security as a service in smart home IoT environments. Our solution uses Software-defined Networking (SDN) for controlling traffic flows inside the network and offloads traffic analysis tasks to a smart Cloud-based Traffic Analyzer (CbTA), which uses a crowd sourced knowledge base for detecting network threats and attacks. It is a scalable, cost-efficient, easily deployable as well as manageable solution for securing different network environments.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84898283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards Ultra-low Power Wearable Health Sensing with Sparse Sampling and Asymmetric Communication","authors":"Deepak Ganesan","doi":"10.1145/2801694.2801710","DOIUrl":"https://doi.org/10.1145/2801694.2801710","url":null,"abstract":"Wearable sensors offer tremendous opportunities for accelerating biomedical discovery, and improving population-scale health and wellness. There is a growing appetite for health analytics -- we are no longer content with wearables that count steps and calories, we want to measure physiology, behavior, activities, cognition, affect, and other parameters with the expectation that such data will lead to deep insights that can improve quality of life. But a chasm separates expectations and reality. How do we extract such insights from sensor platforms with tiny energy budgets? How do we communicate high-rate sensor data to the cloud for enabling deep analytics while operating within these energy budgets? How do we deal with noise, confounders, and artifacts that make insights hard to extract from signals collected in real-world settings? In this talk, I will discuss a few strategies to tackle these problems. I will discuss how we can design an low-power computational eyeglass that continually tracks eye and visual context by leveraging sparsity, how we can transfer data at Megabits/second from wearables while operating at tens of micro-watts of power, and how we can leverage these techniques in the context of mobile health.","PeriodicalId":62224,"journal":{"name":"世界中学生文摘","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90895505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}