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Stable isotope evidence for trophic niche partitioning in a South African savanna rodent community

Current Zoology 2015年第3期61卷 397-411页

作者： Jacqueline CODrON Kevin J DUFFY Nico L AVENANT Matt SPONHEIMEr Jennifer LEICHLITEr Oliver PAINE Paul sandberg Daryl CODrON Institute of Systems Science Durban University of Technology Durban South Africa Karoo Palaeontology Deparlnaent National Museum PO Box 266 Bloemfontein 9301 RSA School of Mathematics Statistics and Computer Science University of KwaZulu-Natal Private Bag X01 Scottsville 3209 RSA Denartment of Mammalogv. National Museum. PO Box 266. Bloemfontein 9301. RSA Department of Anthropology University of Colorado at Boulder Boulder CO80309 USA Florisbad Quaternary research Department National Museum PO Box 266 Bloemfontein 9301 RSA

Species＇ partitioning of resources remains one of the most integral components for understanding community assem- bly. Analysis of stable carbon and nitrogen isotopes in animal tissues has the potential to help resolve patterns of partitioning be- cause these proxies represent the individual＇s diet and trophic niche, respectively. Using free-ranging rodents in a southern Afri- can savanna as a model community, we find that syntopic species within habitats occupy distinct isotope niches. Moreover, spe- cies with strongly overlapping isotope niches did not overlap in their spatial distribution patterns, suggesting an underlying effect of competitive exclusion. Niche conservatism appears to characterize the behaviour of most species in our sample - with little or no observed changes across habitats - with the exception of one species, Mastomys coucha. This species displayed a generalist distribution, being found in similar abundances across a variety of habitats. This spatial pattern was coupled with a generalist isotope niche that shifted across habitats, likely in response to changes in species composition over the same spatial gradient. The case for M. coucha supports contentions that past competition effects played a significant evolutionary role in shaping community structures of today, including the absence of strong interspecific niche overlaps within particular habitats. Our study highlights the value of stable isotope approaches to help resolve key questions in community ecology, and moreover introduces novel ana- lytical approaches to quantifying isotope niche breadths and niche overlaps that are easily comparable with traditional metrices

关键词： Competition Diet Niche breadth Niche overlap Sterkfontein Valley

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Fur glowing under ultraviolet:in situ analysis of porphyrin accumulation in the skin appendages of mammals

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Integrative Zoology 2023年第1期18卷 15-26页

作者： Séverine L.D.TOUSSAINT Jasper PONSTEIN Mathieu THOUrY rémi MÉTIVIEr Daniela C.KALTHOFF Benoît HABErMEYEr roger gUILArD Steffen BOCK Peter MOrTENSEN Sverre sandberg Pierre gUErIAU Eli AMSON Ag Vergleichende Zoologie Institut für BiologieHumboldt Universität zu BerlinBerlinGermany Museum für Naturkunde Berlin Leibniz Institute for Evolution and Biodiversity ScienceBerlinGermany Ag Paläobiologie und Evolution Institut für BiologieHumboldt Universität zu BerlinBerlinGermany IPANEMA CNRSministère de la CultureUVSQMNHNUSR3461UniversitéParis-SaclayGif-sur-YvetteFrance UniversitéParis-Saclay ENS Paris-SaclayCNRSPPSMGif-sur-YvetteFrance Department of Zoology Swedish Museum of Natural HistoryStockholmSweden PorphyChem SAS DijonFrance ICMUB UMR CNRS 6302Universitéde Bourgogne Franche-ComtéFrance Norwegian Porphyria Centre(NAPOS) Haukeland University HospitalNorwegian Organization for Quality Improvement of Laboratory Examinations(Noklus)and Department of Global Public Health and Primary CareFaculty of MedicineUniversity of BergenNorway Institute of Earth Sciences University of LausanneLausanneSwitzerland Staatliches Museum für Naturkunde Stuttgart StuttgartGermany

Examples of photoluminescence(PL)are being reported with increasing frequency in a wide range of organisms from diverse ***,the chemical basis of this PL remains poorly deﬁned,and our understanding of its potential ecological function is still superﬁ*** mammals,recent analyses have identiﬁed free-base por-phyrins as the compounds responsible for the reddish ultraviolet-induced photoluminescence(UV-PL)observed in the pelage of springhares and ***,the localization of the pigments within the hair largely remains to be ***,we use photoluminescence multispectral imaging emission and excitation spec-troscopy to detect,map,and characterize porphyrinic compounds in skin appendages in *** also document new cases of mammalian UV-PL caused by free-base porphyrins in distantly related *** distribution of the UV-PL is strongly suggestive of an endogenous origin of the porphyrinic *** argue that reddish UV-PL is predominantly observed in crepuscular and nocturnal mammals because porphyrins are ***-sequently,this phenomenon may not have a speciﬁc function in intra-or interspeciﬁc communication but rather represents a byproduct of potentially widespread physiological processes.

关键词： in situ analysis mammal multispectral imaging porphyrin UV photoluminescence

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Nat Biotechnol:科学家成功绘制出单细胞中短链rNA分子的图谱

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现代生物医学进展 2017年第8期17卷 I0001-I0002页

作者： Omid r Faridani, Ilgar Abdullayev, Michael Hagemann-Jensen rickard sandberg Ilgar Abdullayev rickard sandberg Michael Hagemann-Jensen John P Schell Fredrik Lanner John P Schell Fredrik Lanner Ludwig Institute for Cancer research Stockholm Sweden. Department of Cell and Molecular Biology Karolinska Institutet Stockholm Sweden. respiratory Medicine Unit Department of Medicine Solna & Center for Molecular Medicine Stockholm Sweden. Department of Clinical Science Intervention and Technology Karolinska Institutet Stockholm Sweden. Division of Obstetrics and gynecology Karolinska University Hospital Stockholm Sweden.

近日，刊登在国际杂志Nature Biotechnology上的一项研究报告中，来自瑞典卡罗琳学院的研究人员通过研究成功在单个胚胎干细胞中测定了短链非编码rNA序列的绝对数量。当基因中的信息被使用时，比如当其编码蛋白质时，首先DNA会转录成为... 详细信息

近日，刊登在国际杂志Nature Biotechnology上的一项研究报告中，来自瑞典卡罗琳学院的研究人员通过研究成功在单个胚胎干细胞中测定了短链非编码rNA序列的绝对数量。当基因中的信息被使用时，比如当其编码蛋白质时，首先DNA会转录成为信使rNA来作为蛋白质制造的范本，

关键词： rNA序列短链 Nat 单细胞科学家编码蛋白质图谱分子

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A Human Factors Model of Card Application

A Human Factors Model of Card Application

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The 6th Pan-Pacific Conference on Occupational Ergonomics

作者： Karl W. sandberg Department of Information Technology and Media Mid Sweden University SWEDEN

Although technical development on encryption (password) ,card produce,card reader, ATM,and digital cash transaction keep improving, many of the effective factors come from the human components in the whole card application system, such as card users ( cost, acceptance, comparison between different cards,access control,and security) .service providers (design,usability,training,evaluation),and retailers (cost,acceptance,security,verification or authentication process,access control,encryption). After reviewing human factor research on the card applications, a human factors model of card application was proposed. Cultural differences of card application were discussed with respect to computer anxiety and administration referring to the model.

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Constructing family identity close to death

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Open Journal of Nursing 2013年第5期3卷 379-388页

作者： Ida Carlander Britt-Marie Ternestedt Jonas sandberg Ingrid Hellstrom Palliative research Centre Ersta Skondal University College&Ersta HospitalStockholmSweden Department of Learning InformaticsManagement and EthicsMedical Management CenterKarolinska InstituteStockholmSweden research and Development Unit Stockholm Sjukhem FoundationStockholmSweden Jonkoping Department of Nursing School of Health ScienceJonkoping UniversityJonkopingSweden Department of Social and Welfare Studies Linkoping UniversityNorrkopingSweden

Daily life close to death involves physical, psychological, and social strain, exposing patients and their family members to major transitions affecting relational patterns and identity. For the individual family member, this often means sharing life with a changing person in a changing relationship, disrupting both individual identity and family identity. Our aim was to deepen the understanding of individual experiences that are important in constructing family identity close to death at home. We performed a secondary analysis of qualitative data collected through 40 interviews with persons with life-threatening illness and the family members who shared everyday life with them. The analysis resulted in interpretive descriptions which provided three patterns important for creating family identity, which we here call “we-ness” close to death. The patterns were: being an existential person, being an extension of the other, and being together in existential loneliness. Together, these three patterns seemed to play a part in the construction of family identity;we-ness, close to death. One important finding was the tension between the search for togetherness in “we-ness” while dealing with an existential loneliness, which seemed to capture an essential aspect of being a family of which one member is dying.

关键词： Dying Identity Family Palliative Care Secondary Analysis

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On the Wake Flow Interaction between Model Turbines with Varying Streamwise Distance

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Open Journal of Fluid Dynamics 2017年第4期7卷 557-578页

作者： Mubashar Khan Ylva Odemark Mats sandberg Jens H. M. Fransson Energy Systems University of G&auml vle G&auml vle Sweden Vattenfall AB Stockholm Sweden Dept. Mechanics Royal Institute of Technology Stockholm Sweden

Wind tunnel measurements using particle image velocimetry have been performed around two perforated discs, with varying streamwise distance, in order to simulate the wake interaction between wind turbines. The static pressure footprint (p-f) on ground level associated with the wake behind the disc and wake velocity data for both the streamwise and wall-normal velocity components with the corresponding turbulence intensities are reported. The p-f method shows that the size of the wake regions, behind the wind turbine models, initially drop when a second disc is placed just downstream of the first one. From a mutual distance (Δ χ) of about five disc diameters (5D), both wake footprints increase as the mutual distance is increased, and for very large mutual distances, approximately Δ χ/ D > 15, the footprint of the downstream disc has recovered and is about the same as for a single disc. At last we conclude that despite very different inlet conditions to the discs, with about 50% of reduced velocity on the centre line upstream of the second disc and an increase of the maximum streamwise fluctuations by 90%, the mean velocities in the wake are proven to scale with the hub height velocity.

关键词： Wind Turbine Model Perforated Disc Wake Flow Interaction Particle Image Velocimetry Pressure Footprint

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到底要不要绩效考核?

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经理人 2006年第7期 64-65页

作者： Kirsten sandberg

如果你真的希望可以摆脱那些麻烦的年度考核，你可以做到。

关键词：绩效考核年度考核摆脱

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路表纹理包络轮廓计算及其对抗滑性能的影响

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长安大学学报（自然科学版） 2019年第5期39卷 11-19页

作者：冉茂平周兴林肖神清 VIEIrA Tiago sandberg Ulf 武汉科技大学汽车与交通工程学院湖北武汉430065 瑞典国家道路与运输研究所东约特兰林雪平58235 哈尔滨工业大学交通科学与工程学院黑龙江哈尔滨150090

为了分析轮胎与路表的接触特性及其对路面抗滑性能的影响,采用路面纹理测量车(road surface tester)获取路表纹理二维轮廓离散数据,运用印痕法模型,利用MATLAB软件计算路表纹理包络轮廓,进一步计算了包络轮廓对应的平均断面深度(mean pr... 详细信息

为了分析轮胎与路表的接触特性及其对路面抗滑性能的影响,采用路面纹理测量车(road surface tester)获取路表纹理二维轮廓离散数据,运用印痕法模型,利用MATLAB软件计算路表纹理包络轮廓,进一步计算了包络轮廓对应的平均断面深度(mean profile depth,MPD)、宏观纹理表面构造水平指数LMa(macro texture indices calculated with texture level)、粗大纹理表面构造水平指数LMe(mega texture indices calculated with texture level)等纹理指标,并与初始轮廓纹理指标进行对比;最后计算包络轮廓、初始轮廓纹理参数MPD、LMa与路面摩擦因数(longitudinal frictional coefficient,LFC)的相关性系数,分析了路表纹理包络轮廓对路面抗滑性能的影响。研究结果表明:包络轮廓纹理参数与初始轮廓纹理参数相关性良好(判定系数r2>0.85);包络轮廓MPD值较初始轮廓MPD值有明显下降,且初始轮廓MPD值越大,包络轮廓MPD值下降幅度也越大;包络轮廓表面构造水平指数较初始轮廓表面构造水平指数下降,LMa的下降幅度比LMe的下降幅度高10%左右;印痕法参数S取值对包络轮廓纹理参数有较大影响,S值越小,其对应的包络轮廓纹理参数值较初始轮廓纹理参数值下降的幅度越大;此外,包络轮廓纹理参数与摩擦因数的判定系数较初始轮廓纹理参数与摩擦因数的判定系数有较大提升,其中MPD与摩擦因数的判定系数提高了约35%,LMa与摩擦因数的判定系数提高了约23%;印痕法参数S值越小,包络纹理参数与摩擦因数的判定系数越高。该结果可为研究胎-路接触特性对路用性能的影响提供参考。

关键词：道路工程包络轮廓印痕法胎-路接触抗滑

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