International Technology Roadmap for Semiconductors 2003の要求清浄度について － シリコンウエハ表面と雰囲気環境に要求される清浄度, 分析方法の現状について －

Buildings are among the largest consumers of electricity in the US. A significant portion of this energy use in buildings can be attributed to HVAC systems used to maintain comfort for occupants. In most cases these building HVAC systems run on fixed schedules and do not employ any fine grained control based on detailed occupancy information. In this paper we present the design and implementation of a presence sensor platform that can be used for accurate occupancy detection at the level of individual offices. Our presence sensor is low-cost, wireless, and incrementally deployable within existing buildings. Using a pilot deployment of our system across ten offices over a two week period we identify significant opportunities for energy savings due to periods of vacancy. Our energy measurements show that our presence node has an estimated battery lifetime of over five years, while detecting occupancy accurately. Furthermore, using a building simulation framework and the occupancy information from our testbed, we show potential energy savings from 10% to 15% using our system.

[ACM Press the 2nd ACM Workshop - Zurich, Switzerland (2010.11.02-2010.11.02)] Proceedings of the 2nd ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Building - BuildSys \'10 - Occupancy-driven energy management for smart building automation

From the Publisher:
Real-Time Systems is both a valuable reference for professionals and an advanced text for Computer Science and Computer Engineering students. 

Real world real-time applications based on research and practice

State-of-the-art algorithms and methods for validation

Methods for end-to-end scheduling and resource management

More than 100 illustrations to enhance understanding

Comprehensive treatment of the technology known as RMA (rate-monotonic analysis) methods

A supplemental Companion Website www.prenhall.com/liu

http://user.it.uu.se/~yi/courses/rts/dvp-rts-08/notes/Course-INFO.pdf

Real-Time Systems

In the last few years, the appealing features of cloud computing have been fueling the integration of cloud environments in the industry, which has been consequently motivating the research on related technologies by both the industry and the academia. The possibility of paying-as-you-go mixed with an on-demand elastic operation is changing the enterprise computing model, shifting on-premises infrastructures to off-premises data centers, accessed over the Internet and managed by cloud hosting providers. Regardless of its advantages, the transition to this computing paradigm raises security concerns, which are the subject of several studies. Besides of the issues derived from Web technologies and the Internet, clouds introduce new issues that should be cleared out first in order to further allow the number of cloud deployments to increase. This paper surveys the works on cloud security issues, making a comprehensive review of the literature on the subject. It addresses several key topics, namely vulnerabilities, threats, and attacks, proposing a taxonomy for their classification. It also contains a thorough review of the main concepts concerning the security state of cloud environments and discusses several open research topics.

/pdf/security-issues-in-cloud-environments-a-survey-1t9z0if3y4.pdf

Security issues in cloud environments: a survey

Hadoop is a popular open-source implementation of MapReduce for the analysis of large datasets. To manage storage resources across the cluster, Hadoop uses a distributed user-level filesystem. This filesystem - HDFS - is written in Java and designed for portability across heterogeneous hardware and software platforms. This paper analyzes the performance of HDFS and uncovers several performance issues. First, architectural bottlenecks exist in the Hadoop implementation that result in inefficient HDFS usage due to delays in scheduling new MapReduce tasks. Second, portability limitations prevent the Java implementation from exploiting features of the native platform. Third, HDFS implicitly makes portability assumptions about how the native platform manages storage resources, even though native filesystems and I/O schedulers vary widely in design and behavior. This paper investigates the root causes of these performance bottlenecks in order to evaluate tradeoffs between portability and performance in the Hadoop distributed filesystem.

/pdf/the-hadoop-distributed-filesystem-balancing-portability-and-5e7vvvq7dq.pdf

The Hadoop distributed filesystem: Balancing portability and performance

"Cloud" is a common metaphor for an Internet accessible infrastructure which is hidden from users. Cloud Computing makes data truly mobile and a user can simply access a chosen cloud with any internet accessible device. Miller(1986) and Koblitz (1987) proposed an Elliptic Curve Cryptosystem (ECC) based mechanism to provide an authentication mechanism for a user can access remote server secretly. Recently, ECC based remote authentication scheme has been used for cloud Internet and remote devices. For instance, Yang and Change proposed an ID-based remote mutual authentication with key agreement scheme for remote devices on Elliptic Curve Cryptosystem in 2009. However, in this paper, we found that their scheme still is vulnerable to insider attack and impersonation attack. Therefore, we proposed an ECC dynamic ID-Based remote mutual authentication scheme for remote devices to solve the issues. Furthermore, we analyzed our scheme to show that our scheme is more secured to authenticate users and remote servers for cloud computing.

An Advanced ECC Dynamic ID-Based Remote Mutual Authentication Scheme for Cloud Computing

Robust smart card secured authentication scheme on SIP using Elliptic Curve Cryptography

Recently, to achieve privacy protection using biometrics, Fan and Lin proposed a three-factor authentication scheme based on password, smart card and biometrics. However, the authors have found that Fan and Lin's proposed scheme (i) has flaws in the design of biometrics privacy, (ii) fails to maintain a verification table, making it vulnerable to stolen-verifier attack and modification attack, and (iii) is vulnerable to insider attacks. Thus, the authors propose an elliptic curve cryptography-based authentication scheme that is improved with regard to security requirements. The authors’ proposed scheme overcomes the flaws of Fan and Lin's scheme and is secured from attacks. Furthermore, the authors have presented a security analysis of their scheme to show that their scheme is suitable for the biometric systems.

https://ietresearch.onlinelibrary.wiley.com/doi/pdf/10.1049/iet-ifs.2011.0348

Robust elliptic curve cryptography-based three factor user authentication providing privacy of biometric data

https://www.tpbin.com/Uploads/Subjects/f84a293e-aeca-4fca-b694-b20a7d2d6a62.pdf

An efficient anonymous authentication protocol for mobile pay-TV

TCP is the predominant technology used on the Internet to support upper layer applications with reliable data transfer and congestion control services. Furthermore, it is expected that traditional TCP applications (e.g., Internet access) will continue to constitute the major traffic component during the initial deployment of wireless mesh networks. However, TCP is known for its poor throughput performance in wireless multihop transmission environments. For this article, we conducted simulations to examine the impact of two channel interference problems, the hidden terminal and exposed terminal, on TCP transmissions over wireless mesh networks. We also propose a multichannel assignment algorithm for constructing a wireless mesh network that satisfies the spatial channel reuse property and eliminates the hidden terminal problem. The simulation results demonstrate the effectiveness of the proposed approach in improving the performance of TCP in wireless multihop networks.

Wei-Kuan Shih

Papers

An Advanced ECC Dynamic ID-Based Remote Mutual Authentication Scheme for Cloud Computing

Robust smart card secured authentication scheme on SIP using Elliptic Curve Cryptography

Robust elliptic curve cryptography-based three factor user authentication providing privacy of biometric data

An efficient anonymous authentication protocol for mobile pay-TV

TCP Throughput Enhancement over Wireless Mesh Networks