Scalability of Non-intrusive Load Monitoring for Shipboard Applications

The non-intrusive load monitor has been demonstrated as an effective tool for evaluating and monitoring shipboard electro-mechanical systems through analysis of electrical power data. A key advantage of the non-intrusive approach is the ability to reduce sensor count by monitoring collections of loads. This paper reviews trade-offs that affect the likely performance of the NILM in a real world environment.Massachusetts Institute of Technology. Sea Grant College Program; Grainger Foundation; National Science Foundation (U.S.); United States. National Aeronautics and Space Administration; United States. Coast Guard; United States. Office of Naval Research. Electric Ship Research and Development Consortium; NAVSEA; University of North Carolin

How Much DC Power Is Necessary?

Many proposals for future power systems for warships are extant. Anticipated improvements in capability, operating economy, and signature reduction may not be uniquely associated with these power systems. Alternatives are available for constructing variable speed drives and prime movers for ships with electric drives. These alternatives may open new design possibilities

Harmful algal blooms and eutrophication : examining linkages from selected coastal regions of the United States

Author Posting. © Elsevier B.V., 2008. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Harmful Algae 8 (2008): 39-53, doi:10.1016/j.hal.2008.08.017.Coastal waters of the United States (U.S.) are subject to many of the major harmful algal bloom (HAB) poisoning syndromes and impacts. These include paralytic shellfish poisoning (PSP), neurotoxic shellfish poisoning (NSP), amnesic shellfish poisoning (ASP), ciguatera fish poisoning (CFP) and various other HAB phenomena such as fish kills, loss of submerged vegetation, shellfish mortalities, and widespread marine mammal mortalities. Here, the occurrences of selected HABs in a selected set of regions are described in terms of their relationship to eutrophication, illustrating a range of responses. Evidence suggestive of changes in the frequency, extent or magnitude of HABs in these areas is explored in the context of the nutrient sources underlying those blooms, both natural and anthropogenic. In some regions of the U.S., the linkages between HABs and eutrophication are clear and well documented, whereas in others, information is limited, thereby highlighting important areas for further research.Support was provided through the Woods Hole Center for Oceans and Human Health (to DMA), National Science Foundation (NSF) grants OCE-9808173 and OCE-0430724 (to DMA), OCE-0234587 (to WPC), OCE04-32479 (to MLP), OCE-0138544 (to RMK), OCE-9981617 (to PMG); National Institute of Environmental Health Sciences (NIEHS) grants P50ES012742-01 (to DMA) and P50ES012740 (to MLP); NOAA Grants NA96OP0099 (to DMA), NA16OP1450 (to VLT), NA96P00084 (to GAV and CAH), NA160C2936 and NA108H-C (to RMK), NA860P0493 and NA04NOS4780241 (to PMG), NA04NOS4780239-02 (to RMK), NA06NOS4780245 (to DWT). Support was also provided from the West Coast Center for Oceans and Human Health (to VLT and WPC), USEPA Grant CR826792-01-0 (to GAV and CAH), and the State of Florida Grant S7701617826 (to GAV and CAH)

In-situ measures of user's preferred listening levels with a portable digital music device

The recent development and popular use of personally worn digital music devices (PDMDs) have led to concerns about the intensity levels they produce. There is concern that users will set a PDMD to levels that are known to be hazardous to human hearing. The concern stems from the private nature of a PDMD in that insert earphones are worn that restrict the output to the user\u27s ears, thus prohibiting monitoring of such devices by parents, teachers, employers, etc. This project measured the in situ dB SPL produced by PDMDs worn by 31 young adults (18-23 years) who had been wearing PDMDs for 3 years or less. Subjects set their PDMD to their preferred listening level (PLL) for a popular tune. Once set, in situ SPL measures of the tune at a reference point and then for a white noise were obtained with a probe microphone located near the eardrum. Hearing thresholds were also obtained. Results showed a range of 52-107 dB with a mean PLL of 83 dB for music and a range of 53-99 dB with a mean PLL of 79 dB for white noise. None of the subjects had significant hearing loss. © 2010 Acoustical Society of America

Decreasing Sound and Vibration During Ground Transport of Infants With Very Low Birth Weight

Objective: To measure the effectiveness of modifications to reduce sound and vibration during interhospital ground transport of a simulated infant with very low birth weight (VLBW) and a gestational age of 30 weeks, a period of high susceptibility to germinal matrix and intraventricular hemorrhage. Study Design: Researchers measured vibration and sound levels during infant transport, and compared levels after modifications to the transport incubator mattresses, addition of vibration isolators under incubator wheels, addition of mass to the incubator mattress and addition of incubator acoustic cover. Result: Modifications did not decrease sound levels inside the transport incubator during transport. The combination of a gel mattress over an air chambered mattress was effective in decreasing vibration levels for the 1368 g simulated infant. Conclusion: Transport mattress effectiveness in decreasing vibration is influenced by infant weight. Modifications that decrease vibration for infants weighing 2000 g are not effective for infants with VLBW. Sound levels are not affected by incubator covers, suggesting that sound is transmitted into the incubator as a low-frequency vibration through the incubator’s contact with the ambulance. Medical transportation can apply industrial methods of vibration and sound control to protect infants with VLBW from excessive physical strain of transport during vulnerable periods of development

Characterization Of The Varicella-Zoster Virus ORF25 Gene Product: pORF25 Interacts With Multiple DNA Encapsidation Proteins

The Herpesviridae contain a group of highly conserved proteins designated the Herpes UL33 Superfamily (pfam03581). The Varicella-zoster virus (VZV) homolog, encoded by the ORF25 gene, was used to generate a GST-ORF25 fusion protein. Purified GST-ORF25 was used to generate a polyclonal rabbit antiserum that detected the 17.5 kDa ORF25 protein (pORF25) in VZV infected cells. In pull-down assays, GST-ORF25 interacted with a number of encapsidation proteins including ORF30, ORF42 (the second exon of ORF45/42) and itself. The self- interaction was confirmed via a yeast two-hybrid assay. Additionally, pORF25 and pORF30 were shown to co-immunoprecipitate from VZV infected cells. Our results suggest that pORF25 is part of the trimeric terminase complex for VZV. However, combined with data from previous studies on HSV-1 and Kaposi’s sarcoma associated herpesvirus (KSVH), we hypothesize that VZV pORF25 and the Herpes UL33 Superfamily homologs are not encapsidation proteins per se but instead work to bring viral proteins together to form functional complexes