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1

Spoth, Thomas, Dyab Khazem, and Gregory I. Orsolini. "New Carquinez Bridge, Northeast of San Francisco, California: Technological Design Advancements." Transportation Research Record: Journal of the Transportation Research Board 1740, no. 1 (2000): 40–48. http://dx.doi.org/10.3141/1740-06.

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The new Carquinez Strait Bridge, northeast of San Francisco, California, will be the first major suspension bridge to be constructed in the United States since the second Chesapeake Bay Bridge in Maryland in 1973. It will replace an existing steel cantilever truss bridge, built in 1927, that was found to be seismically inadequate. The new bridge consists of an orthotropic closed steel box girder superstructure, two main cables 512 mm (20 1/8 in.) in diameter, reinforced concrete towers, and gravity anchorages. The design has set a new standard in modern suspension bridge design in the United S
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2

Reno, Mark L., and Martin Pohll. "Seismic Retrofit of San Francisco-Oakland Bay Bridge West Crossing." Transportation Research Record: Journal of the Transportation Research Board 1624, no. 1 (1998): 73–81. http://dx.doi.org/10.3141/1624-09.

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From the toll plaza on the Oakland shores through the approach structures in San Francisco, the San Francisco—Oakland Bay Bridge, built at a cost of $78,000,000 in 1937, is an engineering marvel that carries over a quarter-million vehicles per day. Because of the different segments of the bridge and their inherent vulnerabilities, retrofitting was assigned to several groups within the California Department of Transportation. Briefly described are the analysis and design of the seismic retrofit of the West Crossing, which spans San Francisco Bay between the city of San Francisco and Yerba Buena
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3

Zhang, Lin, Haining Du, and Linda Lee. "Congestion Pricing Study of San Francisco–Oakland Bay Bridge in California." Transportation Research Record: Journal of the Transportation Research Board 2221, no. 1 (2011): 83–95. http://dx.doi.org/10.3141/2221-10.

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4

Cervero, Robert. "Traffic Impacts of Variable Pricing on the San Francisco–Oakland Bay Bridge, California." Transportation Research Record: Journal of the Transportation Research Board 2278, no. 1 (2012): 145–52. http://dx.doi.org/10.3141/2278-16.

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5

Abbas, Sajid, and Rafael Manzanarez. "Design of Skyway Structures for California's San Francisco-Oakland Bay Bridge." Transportation Research Record: Journal of the Transportation Research Board 11s (January 2005): 329–34. http://dx.doi.org/10.3141/trr.11s.g5103t354271507n.

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6

Nader, Marwan, Rafael Manzanarez, and Man-Chung Tang. "Design of California's New San Francisco—Oakland Bay Self-Anchored Suspension Bridge." Transportation Research Record: Journal of the Transportation Research Board 11s (January 2005): 319–27. http://dx.doi.org/10.3141/trr.11s.8853g8gmr4475477.

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7

Barnes, Ian C., Karen Trapenberg Frick, Elizabeth Deakin, and Alexander Skabardonis. "Impact of Peak and Off-Peak Tolls on Traffic in San Francisco–Oakland Bay Bridge Corridor in California." Transportation Research Record: Journal of the Transportation Research Board 2297, no. 1 (2012): 73–79. http://dx.doi.org/10.3141/2297-09.

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8

Maxwell, Ross R. "Converting a Large Region to a Multimodal Pulsed-Hub Public Transport Network." Transportation Research Record: Journal of the Transportation Research Board 1835, no. 1 (2003): 128–36. http://dx.doi.org/10.3141/1835-16.

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Applicability of the cost-effective strategy used in Switzerland that successfully integrates all public transport for the entire country into a multi-hub timed-transfer system (pulsed-hub network) is investigated using the greater San Francisco Bay Area as an illustrative case study. For the existing and proposed Bay Area rail service routes, the study investigates the optimal repeating (clock-face) base headway for the pulsed-hub network, hub spacing, and locations (ideally adjacent to dense and diverse land uses providing destinations within walking distance, preferably a downtown), and hub
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9

Mikesell, Stephen. "Ernest Leslie Ransome." California History 96, no. 3 (2019): 77–96. http://dx.doi.org/10.1525/ch.2019.96.3.77.

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Ernest L. Ransome is a famous but often misunderstood 19th century California engineer and builder. Architectural historians and engineering professionals see him as a central figure in developing reinforced concrete as a usable building material decades before its use became prevalent. He is most commonly recognized as building the first reinforced concrete bridge, San Francisco's Alvord Lake Bridge, which was built in 1890 and is still in use. Historical accounts of his work, however, are based chiefly upon secondary sources and are sometimes incorrect or misleading. This article clarifies R
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10

Donavan, Paul R., James Reyff, and Carrie Janello. "Prediction and Monitoring of Underwater Sound Levels from the Implosion of a Reinforced Concrete Bridge Pier." Transportation Research Record: Journal of the Transportation Research Board 2628, no. 1 (2017): 47–57. http://dx.doi.org/10.3141/2628-06.

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After the completion of the new east span of the San Francisco–Oakland Bay Bridge in California, large concrete piers of the old span needed to be demolished. To consider using controlled blasting for this action, hydroacoustic levels were predicted and monitored with regard to specified fish and marine mammal criteria. The metrics included peak pressure and sound exposure levels at distances from 25 to more than 4,000 ft from the pier. For peak pressure, the measured levels were slightly higher than estimated, although for sound exposure levels, the measured levels were somewhat lower than es
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11

Kim, Kiyoung, and Hoon Sohn. "Dynamic Displacement Estimation for Long-Span Bridges Using Acceleration and Heuristically Enhanced Displacement Measurements of Real-Time Kinematic Global Navigation System." Sensors 20, no. 18 (2020): 5092. http://dx.doi.org/10.3390/s20185092.

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In this paper, we propose a dynamic displacement estimation method for large-scale civil infrastructures based on a two-stage Kalman filter and modified heuristic drift reduction method. When measuring displacement at large-scale infrastructures, a non-contact displacement sensor is placed on a limited number of spots such as foundations of the structures, and the sensor must have a very long measurement distance (typically longer than 100 m). RTK-GNSS, therefore, has been widely used in displacement measurement on civil infrastructures. However, RTK-GNSS has a low sampling frequency of 10–20
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12

Jarpe, S. P., L. J. Hutchings, T. F. Hauk, and A. F. Shakal. "Selected Strong and Weak-Motion Data From the Loma Prieta Earthquake Sequence." Seismological Research Letters 60, no. 4 (1989): 167–76. http://dx.doi.org/10.1785/gssrl.60.4.167.

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Abstract The purpose of this paper is to document the strong- and weak-motion seismic data from the Loma Prieta earthquake and its aftershocks obtained by Lawrence Livermore National Laboratory (LLNL), and to present some analysis of the spectral seismic response using both weak- and strong-motion recordings. LLNL operates six free-field, digitally recorded, triaxial, strongmotion accelerographs in the vicinity of LLNL; five of these were operating during the Loma Prieta earthquake. Two days after the main event, LLNL initiated a field deployment of 3-component weak-motion instruments to recor
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13

Frick, Karen T., Steve Heminger, and Hank Dittmar. "Bay Bridge Congestion-Pricing Project: Lessons Learned to Date." Transportation Research Record: Journal of the Transportation Research Board 1558, no. 1 (1996): 29–38. http://dx.doi.org/10.1177/0361198196155800105.

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The San Francisco–Oakland Bay Bridge, connecting San Francisco and the East Bay, is one of the most heavily traveled corridors in the nation. In an effort to address traffic congestion in this corridor, the Bay Area Congestion Pricing Task Force—a group of business, environment, public interest, and government organizations—has been examining the viability of variable tolls on the Bay Bridge. Tolls would be higher during peak commute hours when demand is highest and lower in off-peak hours when the bridge has excess capacity. This supply-and-demand-based concept is known as congestion pricing.
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14

Ingram, B. Lynn. "Differences in Radiocarbon Age between Shell and Charcoal from a Holocene Shellmound in Northern California." Quaternary Research 49, no. 1 (1998): 102–10. http://dx.doi.org/10.1006/qres.1997.1944.

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The West Berkeley shellmound, the oldest well-dated archaeological site in the San Francisco Bay region, contains shell and charcoal ranging in age from ca. 1200 to 5700 cal yr B.P. Radiocarbon ages of marine shell and charcoal collected from fifteen stratigraphic levels in the West Berkeley shellmound suggest changes in the 14C content of San Francisco Bay surface waters relative to the atmosphere (the oceanic reservoir age) over the past 5000 yr. The reservoir age of San Francisco Bay waters fluctuated between 870 and −170 14C yr over the past 5000 yr, with the lowest values occurring 2900 t
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15

Min, Jee-Eun, Jeong-Eon Moon, Jong-Kuk Choi, Liane Guild, and Joo-Hyung Ryu. "Above water remote sensing reflectance dataset on the coastal waters of California and Korea." GEO DATA 2, no. 2 (2020): 5–13. http://dx.doi.org/10.22761/dj2020.2.2.002.

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Remote sensing reflectance (Rrs) is the fundamental data of ocean color remote sensing that is used as input data for algorithm development. In this study, the Rrs spectrum in the coastal waters of Korea and California on the other side of the Pacific Ocean were compared and analyzed. The waters in each region showed different characteristics, but the waters of the coast of Gyeonggi Bay and Mokpo showed a similar spectrum to the waters inside the San Francisco Bay. South Sea in Korea showed similar spectral characteristics in California's Monterey Bay coastal waters and the waters outside the
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16

Middlebrook, Ronald F., and Roumen V. Mladjov. "San Francisco – Oakland Bay Bridge Second Crossing." IABSE Symposium Report 99, no. 2 (2013): 618–19. http://dx.doi.org/10.2749/222137813806548613.

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17

Keener, William, Marc A. Webber, Tim M. Markowitz, et al. "Northern Range Expansion of California Coastal Bottlenose Dolphins (Tursiops truncatus)." Aquatic Mammals 49, no. 1 (2023): 29–43. http://dx.doi.org/10.1578/am.49.1.2023.29.

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The California coastal stock of bottlenose dolphins (Tursiops truncatus) expanded its range north from the Southern California Bight, its historical range, into Central California coincident with the 1982-1983 El Niño event. Since the late 1980s, bottlenose dolphin sightings north of Central California have been increasingly reported. To determine the present-day northern range limit for these dolphins, photo-identification efforts were carried out from 2007 to 2018 in San Francisco Bay and nearby coastal waters during which 84 individuals were identified. The results demonstrate a significant
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18

Chizik, Stephanie Marie. "Steel Cables Bridge the Coatings Gap." CoatingsPro 15, no. 1 (2015): 56–62. https://doi.org/10.5006/cp2015_15_1-56.

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19

Springer, Johannes, Sebastian Springer, and Johnny Röhner. "Die Geschichte der San Francisco–Oakland Bay Bridge." Bautechnik 81, no. 4 (2004): 237–50. http://dx.doi.org/10.1002/bate.200490055.

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20

McKee, Lester J., Neil K. Ganju, and David H. Schoellhamer. "Estimates of suspended sediment entering San Francisco Bay from the Sacramento and San Joaquin Delta, San Francisco Bay, California." Journal of Hydrology 323, no. 1-4 (2006): 335–52. http://dx.doi.org/10.1016/j.jhydrol.2005.09.006.

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21

Marquez, Michael, Raymond W. Wolfe, and Eugene Thimmhardy. "New Carquinez Strait Suspension Bridge, San Francisco, California." Structural Engineering International 13, no. 2 (2003): 100–102. http://dx.doi.org/10.2749/101686603777964847.

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22

Vanderhoof, Melanie, Barbara A. Holzman, and Chris Rogers. "Predicting the Distribution of Perennial Pepperweed (Lepidium latifolium), San Francisco Bay Area, California." Invasive Plant Science and Management 2, no. 3 (2009): 260–69. http://dx.doi.org/10.1614/ipsm-09-005.1.

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AbstractPerennial pepperweed is an invasive plant species that occurs throughout the western United States. This study develops a predictive model for perennial pepperweed distribution for the San Francisco Bay Area, based on spatial variables. Distribution data were developed by mapping perennial pepperweed along the shoreline of the South San Francisco Bay, using geographic positioning system units. Spatial relationships between its distribution and spatial variables were tested using binomial logistic regression. Predictive models were mapped using geographic information systems (GIS), and
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23

Holzer, Thomas L., J. Luke Blair, Thomas E. Noce, and Michael J. Bennett. "Predicted Liquefaction of East Bay Fills during a Repeat of the 1906 San Francisco Earthquake." Earthquake Spectra 22, no. 2_suppl (2006): 261–77. http://dx.doi.org/10.1193/1.2188018.

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Predicted conditional probabilities of surface manifestations of liquefaction during a repeat of the 1906 San Francisco (M7.8) earthquake range from 0.54 to 0.79 in the area underlain by the sandy artificial fills along the eastern shore of San Francisco Bay near Oakland, California. Despite widespread liquefaction in 1906 of sandy fills in San Francisco, most of the East Bay fills were emplaced after 1906 without soil improvement to increase their liquefaction resistance. They have yet to be shaken strongly. Probabilities are based on the liquefaction potential index computed from 82 CPT soun
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24

Antunes, M. B., R. Bowler, and R. L. Doty. "San Francisco/Oakland Bay Bridge Welder Study: Olfactory function." Neurology 69, no. 12 (2007): 1278–84. http://dx.doi.org/10.1212/01.wnl.0000276988.50742.5e.

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25

Brown, Jeff L. "Eight Mile Crossing: The San Francisco-Oakland Bay Bridge." Civil Engineering Magazine Archive 82, no. 5 (2012): 42–43. http://dx.doi.org/10.1061/ciegag.0000562.

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26

Tang, Man-Chung, and Rafael Manzanarez. "Design of the New San Francisco-Oakland Bay Bridge." IABSE Symposium Report 84, no. 13 (2001): 1–8. http://dx.doi.org/10.2749/222137801796349574.

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27

Sun, John, Rafael Manzanarez, and Marwan Nader. "Suspension Cable Design of San Francisco-Oakland Bay Bridge." IABSE Symposium Report 86, no. 16 (2002): 42–54. http://dx.doi.org/10.2749/222137802796335802.

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28

Tang, Man-Chung. "San Francisco-Oakland Bay Bridge Design Concepts and Alternatives." IABSE Symposium Report 88, no. 9 (2004): 39–44. http://dx.doi.org/10.2749/222137804796272332.

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29

Gorman, J. A., D. Gross, T. S. Hall, et al. "San Francisco-Oakland Bay Bridge Anchor Rod Cracking Issues." Materials Performance 54, no. 6 (2015): 52–57. https://doi.org/10.5006/mp2015_54_6-52.

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Some high-strength galvanized anchor rods in the new span of the San Fran-cisco-Oakland Bay Bridge failed after being tensioned. Extensive tests were performed to determine the cause of failure and whether ~2,200 other similar rods are susceptible to failure. This article covers independent reviews of industry experience, failure analysis, acceptability of the in-service rods, and issues warranting further research.
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30

Harris, Ruth A. "Forecasts of the 1989 Loma Prieta, California, earthquake." Bulletin of the Seismological Society of America 88, no. 4 (1998): 898–916. http://dx.doi.org/10.1785/bssa0880040898.

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Abstract The magnitude (Mw) 6.9 Loma Prieta earthquake struck the San Francisco Bay area of central California at 5:04 p.m. local time on 17 October 1989, killing 62 people and generating billions of dollars in property damage. Scientists were not surprised by the occurrence of a destructive earthquake in this region and had in fact been attempting to forecast the location of the next large earthquake in the San Francisco Bay area for decades. This article summarizes more than 20 scientifically based predictions made before the 1989 Loma Prieta earthquake for a large earthquake that might occu
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31

Sutton, Rebecca, Sherri A. Mason, Shavonne K. Stanek, Ellen Willis-Norton, Ian F. Wren, and Carolynn Box. "Microplastic contamination in the San Francisco Bay, California, USA." Marine Pollution Bulletin 109, no. 1 (2016): 230–35. http://dx.doi.org/10.1016/j.marpolbul.2016.05.077.

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32

Rivera-Duarte, Ignacio, and A. Russell Flegal. "Benthic lead fluxes in San Francisco Bay, California, USA." Geochimica et Cosmochimica Acta 58, no. 15 (1994): 3307–13. http://dx.doi.org/10.1016/0016-7037(94)90059-0.

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33

Rodda, Peter U., and Nina Baghai. "Late Pleistocene vertebrates from downtown San Francisco, California." Journal of Paleontology 67, no. 6 (1993): 1058–63. http://dx.doi.org/10.1017/s0022336000025385.

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Disarticulated elements from three individuals of Mammuthus cf. M. columbi (Falconer) and one individual of Bison cf. B. latifrons (Harlan) were recovered from an excavation in gravelly, sandy clay of the Colma Formation at the southeast base of Telegraph Hill, San Francisco, California. This is the most abundant collection of late Pleistocene terrestrial vertebrates reported from San Francisco, and only the fourth record from excavations in the city proper. The Mammuthus-Bison association indicates a Rancholabrean age, and elements of these two taxa from this site have been radiocarbon dated
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34

Taylor, Niky C., and Raphael M. Kudela. "Spatial Variability of Suspended Sediments in San Francisco Bay, California." Remote Sensing 13, no. 22 (2021): 4625. http://dx.doi.org/10.3390/rs13224625.

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Understanding spatial variability of water quality in estuary systems is important for making monitoring decisions and designing sampling strategies. In San Francisco Bay, the largest estuary system on the west coast of North America, tracking the concentration of suspended materials in water is largely limited to point measurements with the assumption that each point is representative of its surrounding area. Strategies using remote sensing can expand monitoring efforts and provide a more complete view of spatial patterns and variability. In this study, we (1) quantify spatial variability in
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35

Parsons, Tom, and Patrick E. Hart. "Dipping San Andreas and Hayward faults revealed beneath San Francisco Bay, California." Geology 27, no. 9 (1999): 839. http://dx.doi.org/10.1130/0091-7613(1999)027<0839:dsaahf>2.3.co;2.

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36

Culnane, Mary Frances. "Passenger Vessels for the New Millennium: The Environmental Impacts of the Future San Francisco Bay Area Water Transit Authority Ferry System." Marine Technology and SNAME News 43, no. 02 (2006): 74–84. http://dx.doi.org/10.5957/mt1.2006.43.2.74.

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Technology has transformed the San Francisco Bay region. Silicon Valley and the biotech industry produced plenty of high-paying positions that inflated the economy and created traffic congestion of immense proportions. Growth projections show 1.2 million new Bay Area jobs and a 1.4 million population increase during the next 25 years, accompanied by a 30% increase in region-wide travel and a 40% increase in transbay travel. In an effort to counter the negative aspects of an immobile and consequently less productive commuter society, the California State Legislature created the San Francisco Ba
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37

Mosher, Mike. "Some Aspects of California Cyberpunk." Arts 7, no. 4 (2018): 54. http://dx.doi.org/10.3390/arts7040054.

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This paper explores the rise and fall of Cyberpunk influences in California’s Silicon Valley and San Francisco Bay area circa 1988–93, in prevalent technologies, industry, by artists and in enthusiastic magazines thriving there. Attentive to the Cyberpunk novelists, an animating spirituality of the time also looks to Timothy Leary and Marshall McLuhan.
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38

Burke, Lee, Jeanne M. Logsdon, Will Mitchell, Martha Reiner, and David Vogel. "Corporate Community Involvement in the San Francisco Bay Area." California Management Review 28, no. 3 (1986): 122–41. http://dx.doi.org/10.2307/41165206.

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In 1982, Steve Jobs, a founder and then chairman of Apple Computer, departed from Apple's tradition of avoiding political action to lobby successfully for the passage of California Assembly Bill 3194. This legislation, nicknamed the “Apple Bill,” gave manufacturers special tax credits for donations of scientific equipment to California schools. Through its “Kids Can't Wait” program, Apple has donated computer systems to more than 9,000 elementary and secondary schools. Apple also encourages companies that make products for Apple systems to add these products to Apple's systems donations. Del M
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39

Maddison, David, Kipling Will, Sarah Crews, and James LaBonte. "Bembidion ambiguum (Coleoptera: Carabidae) is established in California." Biodiversity Data Journal 6 (December 4, 2018): e30763. https://doi.org/10.3897/BDJ.6.e30763.

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The ground beetle Bembidion (Neja) ambiguum Dejean is native to Europe and north Africa, in the Mediterranean region. We report it from North America for the first time, from five localities around San Francisco Bay, California. The earliest record is from 2012.
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40

Schmid, Rudolf, Glenn Keator, Eugene N. Kozloff, Linda H. Beidleman, and Dianne Lake. "Three Floristic Works on the San Francisco Bay Region, California." Taxon 44, no. 1 (1995): 123. http://dx.doi.org/10.2307/1222706.

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41

Fuller, C. C., A. van Geen, M. Baskaran, and R. Anima. "Sediment chronology in San Francisco Bay, California, defined by , , , and." Marine Chemistry 64, no. 1-2 (1999): 7–27. http://dx.doi.org/10.1016/s0304-4203(98)00081-4.

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42

Marcus, Laurel. "Restoring tidal wetlands at Sonoma Baylands, San Francisco Bay, California." Ecological Engineering 15, no. 3-4 (2000): 373–83. http://dx.doi.org/10.1016/s0925-8574(00)00087-2.

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43

Langenheim, V. E., R. W. Graymer, R. C. Jachens, R. J. McLaughlin, D. L. Wagner, and D. S. Sweetkind. "Geophysical framework of the northern San Francisco Bay region, California." Geosphere 6, no. 5 (2010): 594–620. http://dx.doi.org/10.1130/ges00510.1.

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44

Watson, Elizabeth Burke, and Roger Byrne. "Late Holocene Marsh Expansion in Southern San Francisco Bay, California." Estuaries and Coasts 36, no. 3 (2013): 643–53. http://dx.doi.org/10.1007/s12237-013-9598-z.

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45

Love, Adam H., Bradley K. Esser, and James R. Hunt. "Reconstructing Contaminant Deposition in a San Francisco Bay Marina, California." Journal of Environmental Engineering 129, no. 7 (2003): 659–66. http://dx.doi.org/10.1061/(asce)0733-9372(2003)129:7(659).

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46

James, David G. "Western North American Monarchs: Spiraling into Oblivion or Adapting to a Changing Environment?" Animal Migration 8, no. 1 (2021): 19–26. http://dx.doi.org/10.1515/ami-2021-0002.

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Abstract Monarch butterflies in western North America typically migrate each fall from the Pacific Northwest to overwintering sites in California. Winter 2020/21 saw the lowest number of overwintering western monarch butterflies ever recorded, but was also marked by a winter-breeding population in the San Francisco bay area that appeared to be the largest ever seen. Recoveries of monarchs with wing tags from the Pacific Northwest suggested that many non-reproductive migrants in fall 2020 became reproductive in the San Francisco bay area and did not reach coastal overwintering sites. Mean daily
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47

Nader, Marwan, Rafael Manzanarez, and Man-Chung Tang. "Design of the New San Francisco-Oakland Bay Bridge Self-Anchored Suspension Bridge." IABSE Symposium Report 86, no. 16 (2002): 15–27. http://dx.doi.org/10.2749/222137802796335929.

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48

Nader, Marwan, Rafael Manzanarez, and George Baker. "Design of the New San Francisco-Oakland Bay Bridge Self-Anchored Suspension Bridge." IABSE Symposium Report 88, no. 6 (2004): 176–81. http://dx.doi.org/10.2749/222137804796291827.

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49

York, Mary K., Laurel Gibbs, Francoise Perdreau-Remington, and G. F. Brooks. "Characterization of Antimicrobial Resistance inStreptococcus pyogenes Isolates from the San Francisco Bay Area of Northern California." Journal of Clinical Microbiology 37, no. 6 (1999): 1727–31. http://dx.doi.org/10.1128/jcm.37.6.1727-1731.1999.

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During 1994 and 1995, 157 isolates of Streptococcus pyogenes from patients with invasive disease were consecutively collected in the San Francisco Bay area to determine the frequency of antimicrobial resistance. Susceptibility testing was performed according to the guidelines of the National Committee for Clinical Laboratory Standards by the disk method and by broth microdilution. For comparison of susceptibility patterns, an additional 149 strains were randomly collected from patients with pharyngitis. For San Francisco County, 32% of the isolates from invasive-disease-related specimens but o
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50

Malamud-Roam, Frances, та B. Lynn Ingram. "Late Holocene δ13C and pollen records of paleosalinity from tidal marshes in the San Francisco Bay estuary, California". Quaternary Research 62, № 2 (2004): 134–45. http://dx.doi.org/10.1016/j.yqres.2004.02.011.

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Records of stable carbon isotopes (δ13C) are presented from cores collected from four San Francisco Bay marshes and used as a proxy for changes in estuary salinity. The δ13C value of organic marsh sediments are a reflection of the relative proportion of C3 vs. C4 plants occupying the surface, and can thus be used as a proxy for vegetation change on the marsh surface. The four marshes included in this study are located along a natural salinity gradient that exists in the San Francisco Bay, and records of vegetation change at all four sites can be used to infer changes in overall estuary paleosa
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