1,712 research outputs found

    45-DAY PUBLIC NOTICE AND COMMENT PERIOD Phase I Environmental Site Assessments (Schools)

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    DTSC will hold a public hearing on the proposed regulations at 10:00 a.m. on November 4, 2002 in the Central Valley Auditorium, 2 nd Floor, 1001 “I ” Street, Sacramento, California, at which time any person may present statements or arguments orally or in writing, relevant to this proposal. Please submit written comments to the contact person listed at the end of this notice. Written comments on the rulemaking submitted no later than 5:00 p.m. on November 4, 2002 will be considered. Representatives of DTSC will preside at the hearing. Persons who wish to speak are requested to register before the hearing. Pre-hearing registration will be conducted at the location of the hearing from 9:30 a.m. to 10:00 a.m. Registered persons will be heard in the order of their registration. Any other person wishing to speak at the hearing will be afforded an opportunity after the registered persons have been heard. AUTHORITY AND REFERENCE These regulations are being proposed under the following authorities: Health and Safety Code section 58012. This section provides DTSC with the authority to adopt and enforce rules and regulations needed for the execution of its duties. The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs, see our Web-site at www.dtsc.ca.gov

    INTEGSCI 3002A: Nutrition: Uncovering the Misconceptions of What We Consume

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    Nutrition misconceptions are widespread and can be harmful to consumers. It is necessary to address and research them to avoid the propagation of misinformation. This investigation revealed the truth behind some commonly debated nutrition topics: frozen produce are equal in nutrition to fresh; protein powders are not a sufficient diet alone because they lack essential nutrients; kombucha has genuine positive health impacts; bottled water is not healthier than tap water; supplements can cause health deterioration over time; and diabetics can manage their condition through diet choices. The information gathered here will provide more power to the consumer to make informed, beneficial choices about their diet and health

    SUMMARY

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    California. Water samples showed no detects of fenoxycarb, hydramethylnon, pyriproxyfen, dimethoate, and methidathion. Bifenthrin was detected in two samples at 0.495 and 0.778 parts per billion (ppb) at nursery sites F and G, respectively. Chlorpyrifos was detected in one sample at 0.06 ppb. Diazinon was detected in two samples at 0.059 and 0.06 ppb at sites F and E, respectively. Malathion was detected in one sample of nursery runoff at 0.07 ppb. Toxicity was tested at San Diego Creek at Campus Drive, an integrated site. This site was not significantly toxic (5 % mortality) to Ceriodaphnia dubia in the water collected. Additional water and sediment samples were collected from a mitigation filter strip planted with Canna to mitigate offsite movement of insecticides and nitrates. Bifenthrin and chlorpyrifos were detected in all water samples with a general trend of declining concentrations as the water passed through the filter strip. Sediment samples were positive for bifenthrin and chlorpyrifos with detections ranging from 776 to 1470 ppb and 27 to 80 ppb, respectively. SCOPE OF THIS MEMORANDUM This memorandum reports results of water sampling conducted by the Department of Pesticide Regulation (DPR), under interagency agreement with the California Department of Food an

    SUMMARY

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    California. Water samples showed no detects of fenoxycarb, hydramethylnon, pyriproxyfen, chlorpyrifos, dimethoate, and methidathion. Bifenthrin was detected in all samples ranging from 0.071 to 2.41 parts per billion (ppb). Diazinon was detected in three samples ranging from 0.055 to 0.187 ppb. Malathion was detected in three samples of nursery runoff ranging from 0.136 to 0.778 ppb. Toxicity was tested at San Diego Creek at Campus Dr., an integrated site. This site was significantly toxic (100 % mortality) to Ceriodaphnia dubia in the water collected. Sediment samples were collected from a mitigation filter strip. Samples were positive for bifenthrin and chlorpyrifos with detections ranging from 733 to 1340 ppb and 28 to 72 ppb, respectively. SCOPE OF THIS MEMORANDUM This memorandum reports results of water sampling conducted by the Department of Pesticide Regulation (DPR), under interagency agreement with the California Department of Food and Agriculture (CDFA), for the Red Imported Fire Ant (RIFA) control project. Data included here are from the February 28, 2001 monitoring, and encompass results from both chemical analyses and aquatic biotoxicity testing. This memorandum summarizes results for bifenthrin, fenoxycarb, hydramethylnon, pyriproxyfen, and five organophosphorus insecticides

    Change the Tempo: Dismantling Vocational Awe in Music Librarianship

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    Interactive session. Vocational awe as identified by Fobazi Ettarh refers to the, “set of ideas, values, and assumptions librarians have about themselves and the profession that result in beliefs that libraries as institutions are inherently good and sacred, and therefore beyond critique.” As a profession, librarianship is often considered as more than “just a job,” but a calling to service grounded in noble values related to education, intellectual freedom, and democracy. While this characterization celebrates librarianship as rewarding and meaningful work, it also fosters a culture of martyrdom, inhibits critical examination of the profession, and inadvertently promotes a spirit of elitism and judgment. Ultimately, such characteristics are incompatible with the ostensible values held by professionals within music librarianship. It is Ettarh’s dedicated, fearless work of challenging the profound notion of vocational awe that has laid the foundation to begin the work of unpacking this concept within the profession of music librarianship. This interactive session provides participants with the opportunity to discuss, and examine the praxis of dismantling vocational awe and the notion that the profession of music librarianship is beyond critique. Panelist will lead group discussions to explore how the worlds of music and librarianship reinforce the manifestations of vocational awe in each other and critically examine the potential impact in areas such as advocacy for music libraries and library workers, as well as the effort to create an equitable and inclusive profession

    Searching for planetary-mass T-dwarfs in the core of Serpens

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    We searched for isolated planetary-mass T-dwarfs in the 3Myr old Serpens Core cluster. We performed a deep imaging survey of the central part of this cluster using the WIRCam camera at the CFHT. Observations were performed through the narrow-band CH4_off and CH4_on filters, to identify young T-dwarfs from their 1.6micr methane absorption bands, and the broad-band JHK filters, to better characterize the selected candidates. We complemented our WIRCam photometry with optical imaging data from MegaCam at CFHT and Suprime-Cam at the Subaru telescope and mid-IR flux measurements from the Spitzer c2d Legacy Survey. We report four faint T-dwarf candidates in the direction of the Serpens Core with CH4_on-CH4_off above 0.2 mag, estimated visual extinction in the range 1-9 mag and spectral type in the range T1-T5 based on their dereddened CH4_on-CH4_off colors. Comparisons with T-dwarf spectral models and optical to mid-IR color-color and color-magnitude diagrams, indicate that two of our candidates (ID1 and 2) are background contaminants (most likely heavily reddened low-redshift quasars). The properties of the other two candidates (ID3 and 4) are consistent with them being young members of the Serpens Core cluster, although our analysis can not be considered conclusive. In particular, ID3 may also be a foreground T-dwarf. It is detected by the Spitzer c2d survey but only flux upper limits are available above 5.8 microns and, hence, we can not assess the presence of a possible disk around this object. However, it presents some similarities with other young T-dwarf candidates (SOri70 in the Sigma Ori cluster and CFHTJ0344+3206 in the direction of IC348). If ID3 and 4 belong to Serpens, they would have a mass of a few Jupiter masses and would be amongst the youngest, lowest mass objects detected in a star-forming region so far.Comment: 11 Pages, 7 Figures, Accepted for publication on A&

    The onset of X-ray emission in young stellar objects: a Chandra observation of the Serpens star-forming region

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    AIMS: To study the properties of X-ray emissions from young stellar objects (YSOs), through their evolution from Class I to Class III and determine whether Class 0 protostars emit in X-rays. METHODS: A deep Chandra X-ray observation of the Serpens star-forming region was obtained. The Serpens Cloud Core is ideally suited for this type of investigation, being populated by a dense and extremely young cluster whose members are found in all different evolutionary stages, including six well studied Class 0 sources. RESULTS: None of the six Class 0 protostars is detected in our observations, excluding the presence of sources with X-ray luminosities > 0.4 10^30 erg/s (for column densities of the order of 4 10^{23} cm^-2, or A_V ~ 200). A total of 85 X-ray sources are detected and the light curves and spectra of 35 YSOs are derived. There is a clear trend of decreasing absorbing column densities as one moves from Class I to Class III sources, and, possibly, evidence of decreasing plasma temperatures, too. We observe a strong, long-duration, flare from a Class II low-mass star, for which we derive a flaring loop length of the order of 20 stellar radii. We interpret the flaring event as originating from a magnetic flux tube connecting the star to its circumstellar disk. The presence of such a disk is supported by the detection, in the spectrum of this star, of 6.4 keV Fe fluorescent emission.Comment: Accepted for publication in A&

    FROM:

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    Board) directed staff to convene a team of independent scientific experts to provide input regarding sediment impairment in the Freshwater, Bear, Jordan, Stitz, and Elk River watersheds. The panel was convened in August of 2002, and, produced the above-noted document o

    Measuring Biodiversity and Extinction – Present and Past

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    How biodiversity is changing in our time represents a major concern for all organismal biologists. Anthropogenic changes to our planet are decreasing species diversity through the negative effects of pollution, habitat destruction, direct extirpation of species, and climate change. But major biotic changes – including those that have both increased and decreased species diversity – have happened before in Earth’s history. Biodiversity dynamics in past eras provide important context to understand ecological responses to current environmental change. The work of assessing biodiversity is woven into ecology, environmental science, conservation, paleontology, phylogenetics, evolutionary and developmental biology, and many other disciplines; yet, the absolute foundation of how we measure species diversity depends on taxonomy and systematics. The aspiration of this symposium, and complementary contributed talks, was to promote better understanding of our common goals and encourage future interdisciplinary discussion of biodiversity dynamics. The contributions in this collection of papers bring together a diverse group of speakers to confront several important themes. How can biologists best respond to the urgent need to identify and conserve diversity? How can we better communicate the nature of species across scientific disciplines? Where are the major gaps in knowledge about the diversity of living animal and plant groups, and what are the implications for understanding potential diversity loss? How can we effectively use the fossil record of past diversity and extinction to understand current biodiversity loss
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