Refine
Year of publication
- 2009 (1113) (remove)
Document Type
- Article (1113) (remove)
Keywords
- Ausbildung (11)
- Didaktik (11)
- Hochschuldidaktik (11)
- Informatik (11)
- Comparative Music Education Germany-Spain (10)
- Cultural Diversity (10)
- Intercultural Music Education (10)
- Interkulturelle Musikerziehung (10)
- Komparative Musikpädagogik Deutschland-Spanien (10)
- Kulturelle Vielfalt (10)
Institute
- Institut für Biochemie und Biologie (117)
- Institut für Chemie (100)
- Institut für Geowissenschaften (99)
- Institut für Physik und Astronomie (84)
- Department Psychologie (61)
- Institut für Romanistik (56)
- Wirtschaftswissenschaften (53)
- Historisches Institut (50)
- Department Linguistik (49)
- Institut für Künste und Medien (41)
- Department Erziehungswissenschaft (35)
- MenschenRechtsZentrum (35)
- Institut für Umweltwissenschaften und Geographie (33)
- Sozialwissenschaften (32)
- Institut für Germanistik (31)
- Department Sport- und Gesundheitswissenschaften (29)
- Institut für Mathematik (27)
- Institut für Informatik und Computational Science (26)
- Institut für Jüdische Studien und Religionswissenschaft (26)
- Institut für Ernährungswissenschaft (19)
- Institut für Anglistik und Amerikanistik (13)
- Interdisziplinäres Zentrum für Dynamik komplexer Systeme (13)
- Kommunalwissenschaftliches Institut (11)
- Department Musik und Kunst (10)
- Philosophische Fakultät (10)
- Vereinigung für Jüdische Studien e. V. (10)
- Hasso-Plattner-Institut für Digital Engineering gGmbH (8)
- Öffentliches Recht (7)
- Department Grundschulpädagogik (6)
- Bürgerliches Recht (4)
- Institut für Philosophie (3)
- Extern (2)
- Lehreinheit für Wirtschafts-Arbeit-Technik (2)
- Moses Mendelssohn Zentrum für europäisch-jüdische Studien e. V. (2)
- Potsdam Transfer - Zentrum für Gründung, Innovation, Wissens- und Technologietransfer (2)
- Wirtschafts- und Sozialwissenschaftliche Fakultät (2)
- Department für Inklusionspädagogik (1)
- Fachgruppe Politik- & Verwaltungswissenschaft (1)
- Institut für Slavistik (1)
- Strafrecht (1)
- Strukturbereich Kognitionswissenschaften (1)
Though orogen-parallel shortening and vertical extension have dominated the tectonic evolution of the central Andes, a significant kinematic shift from horizontal contraction to extension appears to have occurred within the high Puna-Altiplano Plateau, with the establishment of extension oblique to the orogen since late Miocene time. We present data from the southern margin of the Puna Plateau, NW Argentina, where new normal faults have been documented in the Fiambala, Punta Negra, and La Quebrada areas. The unifying characteristics of these areas are that young normal faults reactivate or crosscut older thrust and reverse faults. The relationship between the faults and the late Miocene- Pliocene Punaschotter conglomerate suggests that the extensional faulting must be younger than 3.5 to 7 Ma. Existing data are incomplete but indicate that similar horizontal extension has occurred in many regions throughout the Puna- Altiplano Plateau, while shortening continues along the plateau margins. Given the spatial and temporal distribution of this late Miocene to Pliocene kinematic shift, both lithospheric loss in the Puna Plateau and plateau-wide gravitational extensional spreading enhanced by slowing of plate convergence rate could be responsible. The young, disorganized, horizontal extension in the Andes today may be the precursor to more pronounced extension such as observed on the Tibetan Plateau since mid-Miocene time.
The Hazel Grouse Bonasa bonasia is strongly affected by forest dynamics, and populations in many areas within Europe are declining. As a result of the 'wilding' concept implemented in the National Park Bavarian Forest, this area is one of the refuges for the species in Germany. Even though the effects of prevailing processes make the situation there particularly interesting, no recent investigation about habitat selection in the rapidly changing environment of the national park has been undertaken. We modelled the species-habitat relationship to derive the important habitat features in the national park as well as factors and critical threshold for monitoring, and to evaluate the predictive power of models based on field surveys compared to an analysis of infrared aerial photographs. We conducted our surveys on 49 plots of 25 ha each where Hazel Grouse was recorded and on an equally sized set of plots with no grouse occurrence, and used this dataset to build a predictive habitat-suitability model using logistic regression with backward stepwise variable selection. Habitat heterogeneity, stand structure, presence of mountain ash and willow, root plates, forest aisles, and young broadleaf stands proved to be predictive habitat variables. After internal validation via bootstrapping, our model shows an AUC value of 0.91 and a correct classification rate of 87%. Considering the methodological difficulties attached to backward selection, we applied Bayesian model averaging as an alternative. This multi-model approach also yielded similar results. To derive simple thresholds for important predictors as a basis for management decisions, we alternatively ran tree-based modelling, which also leads to a very similar selection of predictors. Performance of our different survey approaches was assessed by comparing two independent models with a model including both data resources: one constructed only from field survey data, the other based on data derived from aerial photographs. Models based on field data seem to perform slightly better than those based on aerial photography, but models using both predictor datasets provided the highest predictive accuracy.
Applied to the nasal mucosa in low concentrations, nicotine vapor evokes odorous sensations (mediated by the olfactory system) whereas at higher concentrations nicotine vapor additionally produces burning and stinging sensations in the nose (mediated by the trigeminal system). The objective of this study was to determine whether intranasal stimulation with suprathreshold concentrations of S(-)-nicotine vapor causes brain activation in olfactory cortical areas or if trigeminal cortical areas are also activated. Individual olfactory detection thresholds for S(-)-nicotine were determined in 19 healthy occasional smokers using a computer-controlled air-dilution olfactometer. Functional magnetic resonance images were acquired using a 1.5T MR scanner with applications of nicotine in concentrations at or just above the individual"s olfactory detection threshold. Subjects reliably perceived the stimuli as being odorous. Accordingly, activation of brain areas known to be involved in processing of olfactory stimuli was identified. Although most of the subjects never or only rarely observed a burning or painful sensation in the nose, brain areas associated with the processing of painful stimuli were activated in all subjects. This indicates that the olfactory and trigeminal systems are activated during perception of nicotine and it is not possible to completely separate olfactory from trigeminal effects by lowering the concentration of the applied nicotine. In conclusion, even at low concentrations that do not consistently lead to painful sensations, intranasally applied nicotine activates both the olfactory and the trigeminal system.
BACKGROUND: Feedback from the body is assumed to be altered in depression. Nevertheless, empirical studies investigating this assumed relationship remain sparse. This study aimed to examine interrelations between the ability to perceive heartbeats accurately (interoceptive awareness), depressive symptoms, and anxiety in healthy participants. METHODS: A well-validated heartbeat perception task to measure interoceptive awareness together with two questionnaires indexing anxiety and depression were administered to 119 participants. RESULTS: As main results we observed a negative correlation between heartbeat perception and depression. Only when focussing on high anxiety levels this negative correlation coefficient between depression and interoception remained significant. CONCLUSIONS: Our results highlight the possible relationship between depressive symptoms and interoceptive awareness and may have further implications for theoretical models of anxiety disorders and their treatment. Further research is required to examine the potential consequences of altering interoceptive awareness in healthy subjects in relation to depression and anxiety.
Compared with visual and auditory imagery, little is known about olfactory imagery. There is evidence that respiration may be altered by both olfactory perception and olfactory imagery. In order to investigate this relationship, breathing parameters (respiratory minute volume, respiratory amplitude, and breathing rate) in human subjects during olfactory perception and olfactory imagery were investigated. Fifty-six subjects having normal olfactory function were tested. Nasal respiration was measured using a respiratory pressure sensor. Using an experimental block design, we alternately presented odors or asked the subjects to imagine a given smell. Four different pleasant odors were used: banana, rose, coffee, and lemon odor. We detected a significant increase in respiratory minute volume between olfactory perception and the baseline condition as well as between olfactory imagery and baseline condition. Additionally we found significant differences in the respiratory amplitude between imagery and baseline condition and between odor and imagery condition. Differences in the breathing rate between olfactory perception, olfactory imagery, and baseline were not statistically significant. We conclude from our results that olfactory perception and olfactory imagery both have effects on the human respiratory profile and that these effects are based on a common underlying mechanism.
On the relationship between interoceptive awareness and the attentional processing of visual stimuli
(2009)
Mental processes related to visceral activity have gained growing interest during the last few years. The following study is the first to investigate possible interactions between interoceptive awareness and measures of attentional performance. We tested the hypothesis whether interoceptive awareness is positively related to indices of selective and divided attentional performances. Using a heartbeat perception task, 29 healthy female participants were separated into two groups scoring either high or low in an interoceptive awareness task. Attentional performance was assessed by several tests including the 'd2 test of attention' and subtests from the 'TAP: Test Battery for Attentional Performance'. We observed a significantly better performance in selective and divided attention for participants with high interoceptive awareness. Our data suggests that interoceptive awareness is related to a better performance especially in tasks assessing selective and divided attention. We conclude 1) that perception of bodily states might be a crucial determinant for the processing of external, visual stimuli, 2) that the ability to perceive internal signals might be an indicator of self-focused attention, and 3) that bodily signals may use, at least in part, similar processing resources as signals from the attention system.
Performance Management, hier verstanden als leistungs- und wirkungsorientierte Steuerung der Verwaltung, ist eine bedeutende Funktion moderner Verwaltungsführung und steht im Mittelpunkt der internationalen Public-Management-Theorie und -Praxis. In diesem Beitrag wird der Umsetzungsstand des Performance Managements in Deutschland untersucht und dabei auf Bund, Länder und Kommunen eingegangen. Die Analyse orientiert sich insbesondere an den Handlungsfeldern Performance Budgeting, ergebnisorientierte Steuerung sowie Benchmarking und geht der Frage nach, welcher Typus der Performance-Steuerung im Sinne der Kategorien von Bouckaert und Halligan (2008) realisiert ist. Der Beitrag kommt auf der Basis von Literatur- und Dokumentenrecherchen zum Schluss, dass auf Bundes- und Landesebene kaum integrative und flächendeckende Ansätze implementiert sind, verweist aber auf Einzelbeispiele weitergehender Praktiken. Auf kommunaler Ebene ist der Umsetzungsstand höher, was an der Realisierung entsprechender Elemente des Neuen Steuerungsmodells und zunehmend dem neuen Haushalts- und Rechnungswesen liegt. Erklärt und interpretiert wird dieser Stand durch kulturelle, strukturelle und pragmatische Faktoren.
Strategische Steuerung auf zentralstaatlicher Ebene : Ansätze aus Skandinavien und dem Baltikum
(2009)
New Public Management
(2009)
We analyzed published records of terrigenous dust flux from marine sediments off subtropical West Africa, the eastern Mediterranean Sea, and the Arabian Sea, and lake records from East Africa using statistical methods to detect trends, rhythms and events in Plio-Pleistocene African climate. The critical reassessment of the environmental significance of dust flux and lake records removes the apparent inconsistencies between marine vs. terrestrial records of African climate variability. Based on these results, major steps in mammalian and hominin evolution occurred during episodes of a wetter, but highly variable climate largely controlled by orbitally induced insolation changes in the low latitudes.
The origin of the approximately 1000 km-long Beattie Magnetic Anomaly (BMA) in South Africa remains unclear and contentious. Key issues include the width, depth and magnetization of its source. In this study, we use uniformly magnetized spheres, prisms and cylinders to provide the simplest possible models which predict the 1 km-altitude aeromagnetic measurements along a profile across the BMA. The source parameters are adjusted by forward modeling. In case of a sphere, an inversion technique is applied to refine the parameters. Our results Suggest that two similarly magnetized and adjacent sources. With a vertical offset, can explain the observed magnetic anomaly. The best fitting model corresponds to two highly-magnetized (>5 A m(-1)) sheet-like prisms, extending from 9 to 12 kill depth, and from 13 to 18 kill depth, respectively, and with a total width reaching 80 km. Other less-preferred models show thicker and deeper magnetized volumes. Associated magnetizations seem to be mostly induced, although a weak remanent component is required to improve the fit. We also compare our results With the interpretation of independent magnetotelluric and seismic experiments along the same profile. It suggests that the geological sources for the BMA are mostly located in the middle crust and may be displaced by a shear zone or a fault. Contrary to previous models suggesting a serpentinized sliver of paleo-oceanic crust within the Natal-Namaqua Mobile Belt, we propose that granulite-facies mid-crustal rocks within this belt may cause the BMA.