Rise in inlet air temperature increases the corresponding outlet air temperature from the server. As an added effect of rise in inlet air temperature, some active servers may start exhaling intensely hot air to form a...
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Rise in inlet air temperature increases the corresponding outlet air temperature from the server. As an added effect of rise in inlet air temperature, some active servers may start exhaling intensely hot air to form a hotspot. Increase in hot air tem- perature and occasional hotspots are an added burden on the cooling mechanism and result in energy wastage in data centers. The increase in inlet air temperature may also result in failure of server hardware. Identifying and comparing the thermal sensi- tivity to inlet air temperature for various servers helps in the thermal-aware arrangement and location switching of servers to minimize the cooling energy wastage. The peak outlet temperature among the relocated servers can be lowered and even be homogenized to reduce the cooling load and chances of hotspots. Based upon mutual comparison of inlet temperature sensitivity of heterogeneous servers, this paper presents a proactive approach for thermal-aware relocation of data center servers. The experimental results show that each relocation operation has a cooling energy saving of as much as 2.1 kW·h and lowers the chances of hotspots by over 77%. Thus, the thermal-aware relocation of servers helps in the establishment of green data centers.
The representation of spatial features is important for color-spatial based image retrieval systems for producing results that conform to human perception. The paper discusses the performance of the spiral representat...
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The representation of spatial features is important for color-spatial based image retrieval systems for producing results that conform to human perception. The paper discusses the performance of the spiral representation of the spatial feature as proposed by Wang Hui Hui et al. (First Regional Malaysia-France Workshop on Image Processing in Vision Systems and Multimedia Commun., 2003). This novel approach addresses the issues of rotation and scaling invariance overcoming limitations of existing works.
In a local area network (LAN), the availability of all network components is indispensable. To reach this goal it is necessary to secure a LAN against unwanted communication from outside. If there is an unauthorized a...
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In a local area network (LAN), the availability of all network components is indispensable. To reach this goal it is necessary to secure a LAN against unwanted communication from outside. If there is an unauthorized access which blocks the internal traffic, the security mechanism has to react and must exclude this traffic from the internal network.
Cloud server data security makes extensive use of data centers and instantly accessible edge systems for possible transactions involving sizable and confidential data. These Edge Systems are chosen for rental based on...
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Face-to-face communication is very important skill to share intentions. However, many people in the modem world feel that they are deficient in face-to-face communication. So, we feel that it is necessary to support t...
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Face-to-face communication is very important skill to share intentions. However, many people in the modem world feel that they are deficient in face-to-face communication. So, we feel that it is necessary to support their face-to-face communication using information technologies. We have developed a topic-providing system that can infer behaviors from daily life and provides users with information about their conversation partner, including that on his hometown, hobbies and life logs when face-to-face communication is initiated. The life logs are details about a user＇s life, and are generated using a Bayesian network on the basis of sensor data provided by our system. This system enables users to access other users＇ information of behaviors from the accumulated life logs and it utilizes this infbrmation to generate topics for conversation. We evaluated the accuracy with which proposal system inferred behaviors to confirm whether exact life log generation is possible. And we also evaluated the proposed system by administering a questionnaire to confirm whether the proposed system can support face-to-face communication.
The search for the minimum size of reduct is based on the assumption that, within the data set, there are some attributes that are more important than the rest. In this paper, we present an algorithm for finding minim...
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The search for the minimum size of reduct is based on the assumption that, within the data set, there are some attributes that are more important than the rest. In this paper, we present an algorithm for finding minimum-size reducts which is based on a rough set approach and a dedicated decision-related binary integer programming (BIP) algorithm. The algorithm transforms an equivalence class obtained from a decision system into a BIP model. An algorithm for solving the BIP is given. The presented work has links to rough set theory, data mining and nonmonotonic reasoning.
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