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Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fn ray microchemistry, stable isotopes, and fatty acid profles

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Ecological Processes 2021年第1期10卷 1021-1042页

作者： jefrey R.Ziegeweid Michelle R.Bartsch Lynn A.Bartsch Steven j.Zigler Robert j.kennedy Seth A.Love U.S.Geological Survey California Water Science Center6000 J StPlacer HallSacramentoCA 95819USA. U.S.Geological Survey Upper Midwest Water Science Center2280 Woodale DrMounds ViewMN 55112USA. U.S.Geological Survey Upper Midwest Environmental Sciences Center2630 Fanta Reed RoadLa CrosseWI 54603USA. Division of Fisheries Illinois Department of Natural Resources13608 Fox RoadYorkvilleIL 60560USA.

Background:Reproducing populations of invasive carps(Hypophthalmichthys spp.)could alter aquatic food webs and negatively afect native fshes in the Mississippi National River and Recreation Area(MISS)and the *** National Scenic Riverway(SACN).However,proposed invasive carp barriers may also threaten populations of native migratory fshes by preventing movements of fsh between rivers that are necessary for life history *** this study,nonlethal chemical techniques were used to provide baseline data related to the condition,trophic position,and migratory histories of lake sturgeon(Acipenser fulvescens)captured in the Mississippi and *** ***:Fish length and weight measurements and age estimates determined from pectoral fn rays demonstrated that lake sturgeon from the Mississippi River had greater lengths-at-age compared to sturgeon from the *** ***,length–weight relations were similar for sturgeon from the Mississippi and *** *** sturgeon captured from diferent locations had distinguishable fatty acid signatures,and stable isotope analyses demonstrated that lake sturgeon from the Mississippi River generally feed at a higher trophic level than those in the *** ***-to-calcium ratios(Sr:Ca)from fn ray cross sections indicated that sturgeon captured from the Mississippi River had higher Sr:Ca values than sturgeon captured from the *** River,and natal origins and capture locations were not signifcantly diferent among sturgeon captured within individual *** sturgeon were captured in water with a similar Sr:Ca signature as their natal waters,indicating that there is some separation between populations of lake sturgeon in the *** and Mississippi ***,Sr:Ca data indicated substantial variation in movement patterns among individual lake sturgeon,indicating that populations interact through migrations of individual fsh between ***:Study results provide baseline c

关键词： Fin ray microchemistry Stable isotopes Fatty acids Lake sturgeon St.Croix River Mississippi River National park Strontium Calcium

谱聚类的现状及其在社会网络中的应用(英文)

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计算机工程与应用 2013年第3期49卷 213-221页

作者：孟钦学 Paul j.kennedy 悉尼科技大学工程与信息技术学院新南威尔士州悉尼市2007

近年来,凭借其重要的研究意义,采用数据聚类去分析社会网络已成为时下最热门的话题之一。这些研究最直接应用的是防止恐怖袭击和社区通过检测疾病的传播。此外,由于社会网络是动态的,而社会关系的变化是可以通过数据聚类方法预测的。从... 详细信息

近年来,凭借其重要的研究意义,采用数据聚类去分析社会网络已成为时下最热门的话题之一。这些研究最直接应用的是防止恐怖袭击和社区通过检测疾病的传播。此外,由于社会网络是动态的,而社会关系的变化是可以通过数据聚类方法预测的。从而使得清楚了解社会网络结构将有助于促进社会发展和社会成员间的合作。从数据挖掘角度来看,社交网络是一种不完全的,庞大的,复杂的,动态的网络。而这些特性使得传统的数据聚类方法并不能成功应用在社会网络中。相反,作为一个最流行的现代数据的聚类算法,谱聚类在对社交网络的问题提供了一种系统的,灵活实用的解决方案。理论和实验证明,谱聚类在寻找全局最优解和处理大型数据集方面的性能优于传统聚类算法。一方面审视讨论当今谱聚类的理论和算法,及其优于传统聚类算法的特点。另一方面,也涵盖了社会网络的基本知识及两个典型的谱聚类在社会网络中的应用。

关键词：谱聚类社会网络相似度矩阵拉普拉斯矩阵

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Nanofibers enabled advanced gas sensors:A review

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Advanced Sensor and Energy Materials

Advanced Sensor and Energy Materials 2024年第2期3卷 24-40页

作者： Kening Lang Tianyi Liu Daniel j.Padilla Marriana Nelson Christopher W.Landorf Rishi j.Patel Mark L.Ballentine Alan j.kennedy Wu-Sheng Shih Adam Scotch jiadeng Zhu Smart Devices Brewer Science Inc.SpringfieldMO 65806United States jordan Valley Innovation Center Missouri State UniversitySpringfieldMO 65806United States U.S.Army Corps of Engineers Engineer Research and Development Center3909 Halls Ferry RoadVicksburgMS 39180United States

The advancement of gas sensor technology over the past decades has led to remarkable progress and achievements in pollution control and environmental *** with other sensing materials,electrospun nanofibers have attracted significant attention,which is mainly due to their unique characteristics,including but not limited to high surface area,easy structure design,facile facility setup,multifunctional properties,etc.,making them outstanding candidates for potential applications in this *** review provides an overview of the applications of electrospun nanofibers in gas sensors,concentrating on carbon monoxide,hydrogen,carbon dioxide,hydrogen sulfide,ammonia,nitrogen oxides,oxygen,and volatile organic *** begins with a brief introduction to sensing materials and the advantages of electrospun nanofibers along with their ongoing *** principles and progress of electrospinning are then ***,the corresponding properties of electrospun nanofibers in diverse gas sensors are thoroughly ***,a future vision regarding challenges and perspectives in this area is *** review provides an extensive and comprehensive reference to utilize advanced electrospun nanofibers to generate novel sensors,facilitating their performance in high-demand areas.

关键词： Nanofibers Gas sensors Electrospinning Structure design Environmental protection

The emerging role of exercise as a cancer treatment

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journal of Sport and Health Science 2024年第4期13卷 443-444页

作者： kerry S.Courneya Faculty of Kinesiology Sportand RecreationCollege of Health SciencesUniversity of AlbertaEdmontonAlbertaT6G 2H9Canada

Over the past few decades,exercise oncology has emerged as an important subfield within exercise *** that time,substantial progress has been made in understanding the role of exercise in people newly diagnosed with ca... 详细信息

关键词： cancer treatment exercise

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对背面电子照射ICCD成象器氧化硅层X射线总剂量的测量

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光电子技术 1981年第2期 69-77+35页

作者： Andrew j.kennedy 刘民孝

现已计算了增强电荷耦合器件（ICCC）中与氧化硅层吸收X射线总剂量有关的电压和电子流量,该器件是以背面电子照射形式工作。计算是依据光谱强度分布和实际器件Si-SiO2界面的纯剂量测量进行的。它表明:微量的入射电子能被转换成产生并透... 详细信息

现已计算了增强电荷耦合器件（ICCC）中与氧化硅层吸收X射线总剂量有关的电压和电子流量,该器件是以背面电子照射形式工作。计算是依据光谱强度分布和实际器件Si-SiO2界面的纯剂量测量进行的。它表明:微量的入射电子能被转换成产生并透过约10μm硅片的X射线,在1万电子伏时约1×10-4,在2万电子伏时约3×10-4。在发射的X射线总能量中,差不多1.5％被100nm的SiO2所吸收。在1.732千电子伏时,X射线能的85—97％是在特性曲线Kα线中。从10μmSi片背面入射,淀积在SiO2内每一个电子的剂量是D=9.7×10-14E（keV）2·2rad（SiO2）/e-cm-2,从13μm硅片背面入射,淀积在SiO2里的每一个电子的剂量D=3.5×10-14E（keV）2·44rad（SiO2）/e-cm-2。在阴天星光亮度条件下(～10-4lux),以10,15,20kV电压工作的标准ICCD的氧化物里,剂量淀积的速率分别是2.3,6.3,12.7rad（SiO2）/小时。对应这些剂量的比率,特别是在工作电压降低的条件下工作时,希望兆拉德淬火的电荷耦合器件在微光ICCD电视摄象管里有长达10万小时的有效工作寿命。

关键词：电荷耦合器件厚度淀积电压电荷转移器件硅片成象剂量用药量吸收曲线 ICCD

The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous： Pueblo, Colorado, U.S.A.

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Episodes 2005年第2期28卷 93-104页

作者： W.j.kennedy I.Walaszczyk W.A.Cobban GeologicalCollections OxfordUniversityMuseumofNaturalHistoryParksRoadOxfordOXl3PWUnitedKingdom InstituteofGeologyoftheUniversityofWarsaw A1.ZwirkiIWigury9302-089WarszawaPoland 70EstesStreet LakewoodColorado80226USA

Following the recommendation of the International Commission on Stratigraphy (16 votes Yes [94%], 1 abstention, 2 votes not received), the Global boundary Stratotype Section and Point (GSSP) for the base of the Turonian Stage of the Cretaceous System is defined as the base of bed 86 of the Bridge Creek Limestone Member of the Greenhorn Limestone Formation at the western end of the Denver and Rio Grande Railroad cut near the north boundary of the Pueblo Reservoir State Park Recreation Area, west of Pueblo, Colorado, USA. This GSSP horizon is also exposed and protected in the adjacent state recreation area. It coincides with the first occurrence of the ammonite Watinoceras devonense, is in the middle of a global positive excursion in Carbon-13 isotopes, and is bracketed by widespread bentonites that have yield edages of 93 to 93.5 Ma.

关键词：土仑统白垩纪美国地质分层研究科罗拉多州

A column study of the hydro-mechanical behavior of mature fine tailings under atmospheric drying

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International journal of Mining Science and Technology 2017年第2期27卷 203-209页

作者： Anis Roshani Mamadou Fall Kevin kennedy Department of Civil Engineering University of OttawaOttawa KIN 6N5Canada

In this paper, the hydro-mechanical behavior and physical properties of mature fine tailings(MFT) under atmospheric drying are investigated through a column study. In the study, evaporation takes place in the development of suction in the upper parts of the column and increasing suction leads to higher strength in the tailings. After 5 days, the suction in the first lift is around 17 k Pa in the upper part of the *** a second lift is added, the first lift initially loses strength but over a 30 days' period, the strength is recovered to its prior value and suction in the second lift reaches 500 k Pa. The vane shear strength values show a substantial increase in the strength of the MFT after 30 days under atmospheric drying and drainage. The 90% strength found in the column exceeds the threshold(5 k Pa). The hydraulic-mechanical properties of the deposited tailings are closely coupled due to several mechanisms, such as evaporation,drainage, self-consolidation, suction and crack development. The findings of this study will provide a better understanding of the placement behavior of multiple lifts of MFT and thus contribute to reclamation design standards and reduce the use of dedicated disposal areas.

关键词： Tailings Oil sand Environment Drying Multi-lift deposition

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The Global Boundary Stratotype Section and Point （GSSP） for the base of the Cenomanian Stage, Mont Risou, Hautes-Alpes, France

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Episodes 2004年第1期27卷 21-32页

作者： W.j.kennedy A.S.Gale j.A.Lees M.Caron OxfordUniversityMuseumofNaturalHistory ParksRoadOxfordOXI3PWU.K. DepartmentofPalaeontology TheNaturalHistoryMuseumCromwellRoadLondonSW75BPU.K.andSchoolofEarthandEnvironmentalSciencesUniversityofGreenwichChathamMaritimeCampusChathamKentME44AWU.K. ResearchSchoolofGeologicalandGeophysicalSciences BirkbeckCollegeandUniversityCollegeLondonGowerStreetLondonWCIE6BTU.K. InstitutdeGeologie UniversitedeFribourgCH-1700FribourgSwitzerland.

Following the unanimous recommendation of the International Commission on Stratigraphy, the Global boundary Stratotype Section and Point (GSSP) for the base of the Cenomanian Stage is defined at a level 36 metres below the top of the Marnes Bleues Formation, a level that corresponds to the the first appearance of the planktonic foraminiferan Rotalipora globotruncanoides Sigal, 1948, on the south side of Mont Risou, east of Rosans, Haute-Alpes, France, where it can be placed in the context of a series of secondary marker levels based on nannofossils, planktonic foraminifera, ammonites,and an ornate δ^13C curve.

关键词：地层学地层分界线层型地质构造

Irritable bowel syndrome: A microbiome-gut-brain axis disorder?

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World journal of Gastroenterology 2014年第39期20卷 14105-14125页

作者： Paul j.kennedy john F Cryan Timothy G Dinan Gerard Clarke 1.15 Biosciences Institute Department of Psychiatry Alimentary Pharmabiotic Centre University College Cork Cork Ireland Department of Anatomy and Neuroscience Alimentary Pharmabiotic CentreUniversity College CorkCork Ireland

Irritable bowel syndrome(IBS) is an extremely prevalent but poorly understood gastrointestinal disorder. Consequently, there are no clear diagnostic markers to help diagnose the disorder and treatment options are limited to management of the symptoms. The concept of a dysregulated gut-brain axis has been adopted as a suitable model for the disorder. The gut microbiome may play an important role in the onset and exacerbation of symptoms in the disorder and has been extensively studied in this context. Although a causal role cannot yet be inferred from the clinical studies which have attempted to characterise the gut microbiota in IBS, they do confirm alterations in both community stability and diversity. Moreover, it has been reliably demonstrated that manipulation of the microbiota can influence the key symptoms, including abdominal pain and bowel habit, and other prominent features of IBS. A variety of strategies have been taken to study these interactions, including probiotics, antibiotics, faecal transplantations and the use of germ-free animals. There are clear mechanisms through which the microbiota can produce these effects, both humoral and neural. Taken together, these findings firmly establish the microbiota as a critical node in the gut-brain axis and one which is amenable to therapeutic interventions.

关键词： Irritable bowel syndrome Microbiome Anxiety Tryptophan Abdominal pain Gastrointestinal motility Cognition