Search results for: Andreas Kiefer

Items from 1 to 15 out of 15 results

article

Broad‐scale patterns of geographic avoidance between species emerge in the absence of fine‐scale mechanisms of coexistence

Roberto Novella‐Fernandez, Javier Juste, Carlos Ibáñez, Hugo Rebelo, more

Diversity and Distributions > 27 > 9 > 1606 - 1618

Aim The need to forecast range shifts under future climate change has motivated an increasing interest in better understanding the role of biotic interactions in driving diversity patterns. The contribution of biotic interactions to shaping broad‐scale species distributions is, however, still debated, partly due to the difficulty of detecting their effects. We aim to test whether spatial exclusion...

article

Cannabis für medizinische Zwecke und seine ärztliche Verordnung

Andreas Kiefer, Christiane Eckert-Lill, Daniela Bussick, Michael Hörnig, more

Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz > 2019 > 62 > 7 > 811-817

Ärzte dürfen seit dem 10.03.2017 Patienten mit schwerwiegenden Erkrankungen und bei fehlenden Therapiealternativen Cannabis verordnen. Patienten können es als getrocknete Blüten oder Extrakte in standardisierter pharmazeutischer Qualität auf ärztliche Verschreibung (Betäubungsmittelrezept, außer Cannabidiol) in Apotheken erhalten. Bei der Verordnung müssen Ärzte einiges beachten. Voran geht die Entscheidung,...

chapter

Monitoring Multiple Concurrent Service Level Parameters with Multidimensional Trees

Andreas Kiefer, Elias P. Duarte, Cristina D. Murta

Lecture Notes in Computer Science > Integrated Management of Systems, Services, Processes and People in IT > Monitoring and Analysis Tools > 29-42

The introduction of new computing paradigms in the Internet as well as the increasing size and complexity of services and resources demand the development of new approaches for defining and monitoring service levels. It is often necessary to keep track of multiple concurrent service level requirements. In this paper we present a service level monitoring strategy that allows both online and offline...

chapter

Searching for Tight Performance Bounds in Feed-Forward Networks

Andreas Kiefer, Nicos Gollan, Jens B. Schmitt

Lecture Notes in Computer Science > Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance > Full Papers > 227-241

Computing tight performance bounds in feed-forward networks under general assumptions about arrival and server models has turned out to be a challenging problem. Recently it was even shown to be NP-hard [1]. We now address this problem in a heuristic fashion, building on a procedure for computing provably tight bounds under simple traffic and server models. We use a decomposition of a complex problem...

article

Scale‐dependent effects of landscape variables on gene flow and population structure in bats

Orly Razgour, Hugo Rebelo, Sébastien J. Puechmaille, Javier Juste, more

Diversity and Distributions > 20 > 10 > 1173 - 1185

AimA common pattern in biogeography is the scale‐dependent effect of environmental variables on the spatial distribution of species. We tested the role of climatic and land cover variables in structuring the distribution of genetic variation in the grey long‐eared bat, Plecotus austriacus, across spatial scales. Although landscape genetics has been widely used to describe spatial patterns of gene...

article

The shaping of genetic variation in edge‐of‐range populations under past and future climate change

Orly Razgour, Javier Juste, Carlos Ibáñez, Andreas Kiefer, more

Ecology Letters > 16 > 10 > 1258 - 1266

With rates of climate change exceeding the rate at which many species are able to shift their range or adapt, it is important to understand how future changes are likely to affect biodiversity at all levels of organisation. Understanding past responses and extent of niche conservatism in climatic tolerance can help predict future consequences. We use an integrated approach to determine the genetic...

article

The genus Troglophilus Krauss, 1879 (Orthoptera: Rhaphidophoridae) in the west Balkans

IVO KARAMAN, NASERA HAMMOUTI, DRAGAN PAVIĆEVIĆ, ANDREAS KIEFER, more

Zoological Journal of the Linnean Society > 163 > 4 > 1035 - 1063

We present a revision of the genus Troglophilus in the western part of the Balkan Peninsula based on morphological and genetic analysis, and provide distribution data for the species. The results of these analyses reduced the number of the known taxa within the genus Troglophilus in this area to five valid species: Troglophilus cavicola (Kollar, 1833), Troglophilus neglectusKrauss, 1879, Troglophilus ovuliformis...

article

Phenology and roosting habits of the Central European grey long-eared bat Plecotus austriacus (Fischer 1829)

Agnes Scheunert, Andreas Zahn, Andreas Kiefer

European Journal of Wildlife Research > 2010 > 56 > 3 > 435-442

The authors monitored five maternity colonies of Plecotus austriacus to obtain data about phenology, roosting, and emergence behaviour. The bats occupied their roosts between April and October, with maximum colony sizes in August. Roosting sites in the attic’s roof ridge and temperatures of 20–25°C were favoured. Also considering the small colony (maximum 59) and cluster sizes (maximum 13 bats), P. austriacus...

article

The Austrian Brain Tumour Registry: a cooperative way to establish a population-based brain tumour registry

Adelheid Wöhrer, Thomas Waldhör, Harald Heinzl, Monika Hackl, more

Journal of Neuro-Oncology > 2009 > 95 > 3 > 401-411

In Austria, registration of malignant brain tumours is legally mandatory, whereas benign and borderline tumours are not reported. The Austrian Brain Tumour Registry (ABTR) was initiated under the auspices of the Austrian Society of Neuropathology for the registration of malignant and non-malignant brain tumours. All Austrian neuropathology units involved in brain tumour diagnostics contribute data...

article

Foraging site fidelity shapes the spatial organisation of a population of female western barbastelle bats

Jessica Hillen, Andreas Kiefer, Michael Veith

Biological Conservation > 2009 > 142 > 4 > 817-823

Information about the spatial distribution of individual foraging habitats, which determines the space required by a population to be viable, is vitally important for the conservation of bats. Detailed knowledge of this kind is crucial for the design of nature reserves and management plans. Recent field studies that examined habitat use and home range distribution of bats largely ignored factors like...

article

Cracking the nut: Geographical adjacency of sister taxa supports vicariance in a polytomic salamander clade in the absence of node support

Michael Veith, Evelyne Lipscher, Mehmet Öz, Andreas Kiefer, more

Molecular Phylogenetics and Evolution > 2008 > 47 > 3 > 916-931

The urodelan genus Lyciasalamandra, which inhabits a relatively small area along the southern Turkish coast and some Aegean islands, provides an outstanding example of a diverse but phylogenetically unresolved taxon. Molecular trees contain a single basal polytomy that could be either soft or hard. We here use the information of nuclear (allozymes) and mitochondrial (fractions of the 16S rRNA and...

article

Fabrication of Magnetically Separable Mesostructured Silica with an Open Pore System

An-Hui Lu, Wen-Cui Li, Andreas Kiefer, Wolfgang Schmidt, more

Journal of the American Chemical Society > 2004 > 126 > 28 > 8616 - 8617

article

Synthesis of Polyacrylonitrile-Based Ordered Mesoporous Carbon with Tunable Pore Structures

Anhui Lu, Andreas Kiefer, Wolfgang Schmidt, Ferdi Schüth

Chemistry of Materials > 2004 > 16 > 1 > 100 - 103

article

High gene diversity at swarming sites suggest hot spots for gene flow in the endangered Bechstein's bat

Gerald Kerth, Andreas Kiefer, Carsten Trappmann, Manfred Weishaar

Conservation Genetics > 2003 > 4 > 4 > 491-499

Our study shows that endangered Bechstein'sbats utilise distinct habitats at differentstages of their reproductive cycle, a findingthat has implications how habitat should beselected for preservation. Using nuclear andmitochondrial microsatellite DNA markers wecompared gene diversity of Bechstein's batswithin breeding colonies and at potentialmating sites. Bechstein's bat is one of themost threatened...

article

Determination of the cellular retinoic-acid-binding protein in dysplastic epithelia of the cervix uteri, differentiated into apo and holo forms

Stefanie Volz-Kster, Joachim Volz, Andreas Kiefer, Hans-K. Biesalski

Journal of Cancer Research and Clinical Oncology > 2000 > 126 > 1 > 53-56

AbstractPurpose: The appearance of the cervical mucosa is regulated by different factors including retinoic acid. Hormone-dependent alteration of the cervix uteri mucosa is accompanied by a decrease or increase of cytoplasmatic retinoic-acid-binding protein (CRABP). To elucidate whether this hormone-dependent alteration of CRABP is preserved in the case of neoplasms of the cervix uteri, we measured...

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