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Articulating China's Science and Technology:Knowledge Collaboration Networks Within and Beyond the Yangtze river Delta Megalopolis in China

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Chinese geographical Science 2018年第2期28卷 247-260页

作者： LI Yingcheng Nicholas A.phelps School of Architecture Southeast University Bartlett School of Planning University College London

In this paper, we reconsider the defining but often overlooked ‘hinge' function of megalopolises by analyzing how megalopolises have articulated national and international urban systems in the context of a globalizing knowledge economy. Taking the case of China's Yangtze river Delta(YrD) r.g.on, we particularly focus on knowledge circulation within and beyond the YrD r.g.on by analyzing the pattern and process of knowledge collaboration at different geographical scales during the 2004–2014 period. results show that the structure of scientific knowledge collaboration as reflected by co-publications has been strongest at the national scale whereas that of technological knowledge collaboration as measured by co-patents has been strongest at the global scale. Despite this difference, the structure of both scientific and technological knowledge collaboration has been functionally polycentric at the megalopolitan scale but become less so at the national and global scales. The ‘globally connected but locally disconnected' pattern of Shanghai's external knowledge collaboration suggests that the gateway role of the YrD megalopolis in promoting knowledge collaboration at different geographical scales will take time before it is fully realized.

关键词： urban network publication patent scale gateway Yangtze river Delta (YrD)

ASIAN CArP EXPANSION IN THE MISSISSIPPI rIVEr:FOCUSINg ON THE LEADINg EDgE OF THE INVASION FrONT

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水生生物学报 2018年第6期42卷 1075-1080页

作者： TrIPP Sara phelps Quinton Big rivers and Wetlands Field Station Missouri Department of Conservation3815 East Jackson BoulevardJacksonMissouri 63755USA West Virginia University Division of Forestry and Natural Resources307C Percival HallMorgantownWest Virginia 26505USA

Asian carp are expanding their range throughout the Mississippi river; however, abundance is thought to be highest in reaches within close proximity to the Illinois river. In the Mississippi river, Lock and Dam 19(L&D 19) at Keokuk, Iowa is the primary barrier to slow the expansion upstream. As Asian carp abundance increases below L&D 19, it is important to investigate potential means of control(i.e., reduction through harvest and barriers) that will prevent complete invasion of the Mississippi river above L&D 19. Silver Carp and Bighead Carp were collected below L&D 19, a subsample were implanted with ultrasonic transmitters to evaluate passage through the lock chamber and the remainder were used to determine population dynamics at the leading edge of invasion. Although the dam portion of the structure poses a complete barrier to upstream expansion, we documented lock chamber passage demonstrating the lock chamber has the capability to provide passage upstream. Based on the results of the population assessment, in order to induce recruitment overfishing at this leading edge of invasion, Asian carp will need to be intensively harvested at 300 mm and larger. The combination of commercial fishing efforts and research investigating ways to prevent passage upstream must be employed.

关键词： Mississippi river remainder

Analyses of fin ray types to detect strontium markers in juvenile blunt-snout bream Megalobrama amblycephala

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Ecological Processes 2024年第1期13卷 206-216页

作者： Yahua Zhu Tao Jiang Xiubao Chen Hongbo Liu Quinton phelps Jian Yang Wuxi Fisheries College Nanjing Agricultural University (WFCNAU) Laboratory of Fishery Microchemistry Freshwater Fisheries Research Center Chinese Academy of Fishery Sciences (FFRCCAFS) Department of Biology Missouri State University (DBMSU)

Background restocking by introducing hatchery-reared fish into wild habitats aids in the restoration of fishery aquatic ecosystems and reefs to increase the abundance of fish resources, restore the ecological balance of water bodies, and enhance ecosystem functioning. Accurately, rapidly, and effectively evaluating the success of restocking using chemical markers（e.g., strontium [Sr]） remains challenging for fisheries management. Consequently, for nonlethal fish sampling, hard tissues, such as fin rays, have received increasing attention as a target for marking method. However, data on the differences in marking different types of fin rays remain limited. Therefore, we exposed juvenile blunt snout bream individuals（Megalobrama amblycephala） to 0（control group） or 800 mg/L of SrCl2·6H2O（marked group） for 5 days and transferred them into normal aerated water for post-immersion culture. We sampled their pectoral, dorsal, ventral, anal, and caudal fin rays. The Sr marks among the fin types were sampled at 0 and 20 days post-immersion and evaluated using an electron probe micro-analyzer（EPMA） for the five-day Sr/Ca ratios, along with line transect and Sr mapping *** Sr marking signatures were observed in all fin types in the marked group, with a success rate of up to 100%. Although marking efficiency varied among the different fin ray types, the highest Sr/Ca ratios were most often detected in the dorsal fin. Cross-sectional Sr concentration maps of all fin rays sampled showed high-Sr domains in the marked group; in contrast, the entire cross-sections of the control group displayed low Sr contents, indicating successful marking *** Fin ray Sr marking is a successful method for juvenile M. amblycephala, with the advantages of nonlethality and negligible sampling injuries, facilitating the rapid and effective evaluation of Sr marking in restocking M. amblycephala.

关键词： Megalobrama amblycephala Juvenile Fin ray Strontium marking Electron probe micro-analyzer

A rAPID ASSESSMENT APPrOACH FOr EVALUATINg SILVEr CArP gENDEr

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水生生物学报 2018年第6期42卷 1081-1083页

作者： WOLF Michael C. phelps Quinton E. SEIBErT Justin r. TrIPP Sara J. Department of Natural resources Fish and Wildlife Division204 Main Street East BaudetteMinnesota 56623USA West Virginia University Division of Forestry and Natural Resources307C Percival HallMorgantownWest Virginia 26505USA Southeast Missouri State University Biology Department 1 University Plaza Cape GirardeauMissouri 63701USA Big rivers and Wetlands Field Station Missouri Department of Conservation3815 East Jackson BoulevardJacksonMissouri 63755USA

Silver carp Hypophthalmichthys molitrix were introduced into the U.S. to control water quality in aquaculture ponds. From this point of or.g.n, silver carp escaped into nearby rivers through multiple flood events. Because of their documented negative effects on native biota, silver carp have been labeled as problematic. Therefore, evaluating the biology and ecology of these non-indigenous species is critical. Multiple parameters are needed to evaluate silver carp populations(length, weight, age, and sex). Furthermore, developing methods for rapidly acquiring these data are needed. In relation to sex determination, sexual dimorphism was observed where males exhibit distinct pectoral fin ray features. Specifically, males have pronounced ridges or a "rough patch" on the dorsal surface of pectoral fins. Therefore, to test if this was an applicable way of determining silver carp gender; silver carp were collected from Midwestern U.S. rivers(N=2015) in the fall of 2011(N=870), spring of 2012(N=645), winter of 2013—2014(N=202) and summer2015(N=323) via electrofishing. For each silver carp collected, presence(e.g., rough patch) or absence(e.g.,smooth) of pronounced ridges on the top side of the pectoral fins was recorded, and an incision was made in the body cavity to identify gender. Based on the results of our evaluation, gender was correctly identified over99% of the time(2006 out of 2015) based on the pectoral fin dimorphism. In the samples taken in the winter of 2013—2014 and summer of 2015, accuracy for silver carp shorter than 300 mm and longer than 800 mm was 53.7%(19 out of 41) while accuracy for silver carp between 300 mm and 800 mm total length was 98.9%(289 out of 292). This study provides a rapid assessment approach for evaluating silver carp gender.

关键词： Invasive species gender assessment

AgE-0 SILVEr CArP AND gIZZArD SHAD DAILY grOWTH AND HATCH TIMINg IN THE MIDDLE MISSISSIPPI rIVEr

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水生生物学报 2018年第6期42卷 1084-1088页

作者： WOLF Michael C. HAUPT Kevin phelps Quinton E. Department of Natural resources Fish and Wildlife Division204 Main Street East BaudetteMinnesota 56623USA U.S.Fish and Wildlife Service Carterville Fish and Wildlife Conservation Office 9053 Rt.148 Suite A MarionIllinois 62959USA West Virginia University Division of Forestry and Natural Resources307C Percival HallMorgantownWest Virginia 26505USA

The establishment of a highly efficient planktivore, Silver carp(Hypophthalmichthys molitrix), in the Mississippi river Basin has been documented as having negative impacts on native planktivore populations. Silver carp have the potential, to alter the trophic food web through negative interactions with native planktivores in large river systems. Due to increasing Silver carp ranges, interactions between Silver carp and other native planktivores is likely to increase. One abundant native planktivore that is often found in similar habitats as Silver carp is gizzard shad(Dorosoma cepedianum). Potential competition for resources exists because of overlapping habitat use and for.g.. given the similarities between these two planktivores, we sought to evaluate daily growth rates and determine hatch dates of age-0 Silver carp and gizzard shad in the Middle Mississippi river. Silver carp and gizzard shad were collected from the Middle Mississippi river using an electrified surface trawl from June through September with sizes ranging from 21—65 mm total length for.g.zzard shad and 24—85 mm total length for Silver carp. A sample of age-0 fish(n=697) was collected at the end of the growing season including 292 gizzard shad and 405 Silver carp. Size structure(total length in mm) of Silver carp(49.05±0.41; ± SE) was significantly greater(T= –16.43, df=695, Pgizzard shad(38.95 ± 0.45). Hatch dates were similar between Silver carp(July 26 th to August 18 th) and gizzard shad(July 28 th to August 19 th). growth of Silver carp(2.24 mm per day) was significantly greater(Pgizzard shad(1.72 mm per day). Mortality was similar between Silver carp(28.1%)and gizzard shad(25.1%) at this early life stage. The faster.g.owth rates in Silver carp result in Silver carp entering the winter season larger in size with likely an increased capacity to consume plankton and decreased predation ultimately leading to higher recruitment. Knowing that there exists

关键词： Dorosoma cepedianum Silver carp

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专题讨论：信息素养与信息职业

图书情报知识 2010年第5期27卷 42-45页

作者： Jason phelps InformationSchool University of Washington

Future of Information Professionals After.g.aduating 3 years ago with my MBA,I now find myself backin the a cademic world trying to solve amajor problemthat I

关键词：信息技术信息素养信息职业信息从业者

HOW TO DrOP THAT BASS WHILE LOOKINg DEVILISHLY HANDSOME:A CHArLATAN'S gUIDE

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城市漫步（全国英文版） 2015年第2期 24-25页

作者： Tim phelps 不详

If you ever.g.t talking to a DJ...don'***'re all a bunch of pompous,elfaggrandising,douch-bags.I *** fact,stop reading r.g.t *** is something of an identity crisis in DJs.

关键词： something get bunch

Network analysis to inform invasive species spread among lakes

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Journal of Oceanology and Limnology 2019年第3期37卷 1037-1041页

作者： ESCOBAr Luis E. rOMErO-ALVArEZ Daniel LArKIN Daniel J. phelps Nicholas B. D. Department of Fish and Wildlife Conservation Virginia TechBlacksburgVirginiaUSA Department of Ecology and Evolutionary Biology-Biodiversity Institute University of KansasLawrenceUSA Department of Fisheries Wildlifeand Conservation BiologyUniversity of MinnesotaSt.PaulMinnesotaUSA Minnesota Aquatic Invasive Species research Center University of MinnesotaSt.PaulMinnesotaUSA

Often facilitated by human-mediated pathways,aquatic invasive species are a threat to the health and biodiversity of global *** present a novel approach incorporating survey data of watercraft movement in a social network analysis to reconstruct potential pathways of aquatic invasive species spread between *** an example,we use the green alga Nitellopsis obtusa,also known as starry stonewort,an aquatic invasive species affecting the great Lakes r.g.on in the United States and *** movement of algal fr.g.ents via human-mediated pathways(i.e.,watercraft)has been hypothesized as the primary driver of starry stonewort *** used survey data collected at boat ramps during the 2013 and 2014 openwater seasons to describe the flow of watercraft from Lake Koronis,where *** was first detected in Minnesota,to other lakes in the *** results suggest that the risk of *** expansion is not highly constrained by geographic proximity and management efforts should consider highly connected *** human movement via network analysis may help to explain past and future routes of aquatic invasive species infestation between lakes and can improve evidence-based prevention and control efforts.

关键词： Nitellopsis obtusa starry stonewort lake network invasion

great Prospects of Near Field Communication

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射频世界 2008年第4期 72-74页

作者： richard phelps

1 What is NFC? Evolving from a combination of contactless, identification and networking technology, NFC is a short-range wireless connectivity standard. With the increased adoption of rFID contactless smart- cards to... 详细信息

关键词： NFC