The Experts below are selected from a list of 1026 Experts worldwide ranked by ideXlab platform
Jiaqiang Wang - One of the best experts on this subject based on the ideXlab platform.
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reliability and availability analysis of a hybrid cooling system with water side economizer in data center
Building and Environment, 2019Co-Authors: Jiaqiang Wang, Quan Zhang, Sungmin Yoon, Yuebin YuAbstract:Abstract The cost of data center Downtime has increased significantly recently and it is critical for any data center to minimize the Unplanned Downtime. A reliable cooling system is of great importance to ensure the thermal environment and achieve this goal. The reliability and availability analysis (RAA) is a scientific way to quantify the risk and determine the potential solutions for a system design and operation. Hybrid cooling system with water-side economizer as a promising energy saving method in data center has complicated configuration and multi operation modes. Thus, it is very necessary to conduct the RAA on this novel system and understand it. In this study, the Markov model combined with reliability block diagram method, which can drastically reduce the computation dimension, was developed to evaluate the reliability and operational availability (OA). Functional Availability (FA) was presented as a new measure by integrating OA with specific function criteria such as room temperature. Additionally, we proposed a maximum allowable Downtime (MADT) to quantify how long a repair time is acceptable in different scenarios. The detailed method, evaluation procedure and results of a hybrid cooling system were presented.
Hardeep Singh - One of the best experts on this subject based on the ideXlab platform.
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Contingency planning for electronic health record-based care continuity: A survey of recommended practices.
International journal of medical informatics, 2014Co-Authors: Dean F Sittig, Hardeep SinghAbstract:BACKGROUND: Reliable health information technology (HIT) in general, and electronic health record systems (EHRs) in particular are essential to a high-performing healthcare system. When the availability of EHRs are disrupted, alternative methods must be used to maintain the continuity of healthcare. METHODS: We developed a survey to assess institutional practices to handle situations when EHRs were unavailable for use (Downtime preparedness). We used literature reviews and expert opinion to develop items that assessed the implementation of potentially useful practices. We administered the survey to U.S.-based healthcare institutions that were members of a professional organization that focused on collaboration and sharing of HIT-related best practices among its members. All members were large integrated health systems. RESULTS: We received responses from 50 of the 59 (84%) member institutions. Nearly all (96%) institutions reported at least one Unplanned Downtime (of any length) in the last 3 years and 70% had at least one Unplanned Downtime greater than 8h in the last 3 years. Three institutions reported that one or more patients were injured as a result of either a planned or Unplanned Downtime. The majority of institutions (70-85%) had implemented a portion of the useful practices we identified, but very few practices were followed by all organizations. CONCLUSIONS: Unexpected Downtimes related to EHRs appear to be fairly common among institutions in our survey. Most institutions had only partially implemented comprehensive contingency plans to maintain safe and effective healthcare during unexpected EHRs Downtimes.
Bastian Lewke - One of the best experts on this subject based on the ideXlab platform.
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Use of a fiber-optic sensor system to review distributed magnetic field simulation of a wind turbine
2008 Asia-Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008Co-Authors: Sebastian G. M. Kramer, Fernando Puente León, Bastian LewkeAbstract:According to the Lightning Protection Institute in the USA, lightning damage is the single largest cause of Unplanned Downtime in wind turbines. The damages can either be caused by direct effects on the structure, or by indirect effects on the systempsilas electronics. Hence, enhanced efforts on the improvement of the lightning protection system of wind turbines have been undertaken to reduce both effects. Therefore, electromagnetic analysis of different elements of the turbine is performed. In order to verify these simulations and to specify the need for shielding inside the turbine elements, the lightning induced field inside the different elements has to be measured and reviewed. In this paper we present a novel approach for potential-free magnetic field measurements, using fiber optic magnetic field sensors based on magnetic garnets. These sensors feature a broad frequency range, an inherent galvantic isolation as well as a low weight.
Dl Sisterson - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric Radiation Measurement Program Climate Research Facility Operations Quarterly Report January 1?March 31, 2010
2010Co-Authors: Dl SistersonAbstract:The U.S. Department of Energy (DOE) requires national user facilities to report time-based operating data. The requirements concern the actual hours of operation (ACTUAL); the estimated maximum operation or uptime goal (OPSMAX), which accounts for planned Downtime; and the VARIANCE [1 – (ACTUAL/OPSMAX)], which accounts for Unplanned Downtime
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Atmospheric Radiation Measurement program climate research facility operations quarterly report January 1 - March 31, 2008.
2008Co-Authors: Dl SistersonAbstract:The U.S. Department of Energy (DOE) requires national user facilities to report time-based operating data. The requirements concern the actual hours of operation (ACTUAL); the estimated maximum operation or uptime goal (OPSMAX), which accounts for planned Downtime; and the VARIANCE [1 – (ACTUAL/OPSMAX)], which accounts for Unplanned Downtime.
Yuebin Yu - One of the best experts on this subject based on the ideXlab platform.
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reliability and availability analysis of a hybrid cooling system with water side economizer in data center
Building and Environment, 2019Co-Authors: Jiaqiang Wang, Quan Zhang, Sungmin Yoon, Yuebin YuAbstract:Abstract The cost of data center Downtime has increased significantly recently and it is critical for any data center to minimize the Unplanned Downtime. A reliable cooling system is of great importance to ensure the thermal environment and achieve this goal. The reliability and availability analysis (RAA) is a scientific way to quantify the risk and determine the potential solutions for a system design and operation. Hybrid cooling system with water-side economizer as a promising energy saving method in data center has complicated configuration and multi operation modes. Thus, it is very necessary to conduct the RAA on this novel system and understand it. In this study, the Markov model combined with reliability block diagram method, which can drastically reduce the computation dimension, was developed to evaluate the reliability and operational availability (OA). Functional Availability (FA) was presented as a new measure by integrating OA with specific function criteria such as room temperature. Additionally, we proposed a maximum allowable Downtime (MADT) to quantify how long a repair time is acceptable in different scenarios. The detailed method, evaluation procedure and results of a hybrid cooling system were presented.
