Multivariate Analysemethoden

Backhaus, Klaus; Erichson, Bernd; Plinke, Wulff; Weiber, Rolf

doi:10.1007/978-3-662-46076-4

Cited by 279 publications

(134 citation statements)

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“…For inter-call interval, we focussed on the range between 0 and 2 s (11,370 calls), as changes in inter-call intervals were most prominent below 2 s. In all performed tests, significance was tested at an alpha=0.05 level. When significant differences were found in one of the above-mentioned distributions, we performed post hoc clustering analyses using weighted linkage (proximity matrix with Spearman's distance)66. Using this approach, we were able to subdivide our group of five animals into distinct clusters.…”

Section: Methodsmentioning

confidence: 99%

Limiting parental feedback disrupts vocal development in marmoset monkeys

2017

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Vocalizations of human infants undergo dramatic changes across the first year by becoming increasingly mature and speech-like. Human vocal development is partially dependent on learning by imitation through social feedback between infants and caregivers. Recent studies revealed similar developmental processes being influenced by parental feedback in marmoset monkeys for apparently innate vocalizations. Marmosets produce infant-specific vocalizations that disappear after the first postnatal months. However, it is yet unclear whether parental feedback is an obligate requirement for proper vocal development. Using quantitative measures to compare call parameters and vocal sequence structure we show that, in contrast to normally raised marmosets, marmosets that were separated from parents after the third postnatal month still produced infant-specific vocal behaviour at subadult stages. These findings suggest a significant role of social feedback on primate vocal development until the subadult stages and further show that marmoset monkeys are a compelling model system for early human vocal development.

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Section: Methodsmentioning

confidence: 99%

Limiting parental feedback disrupts vocal development in marmoset monkeys

2017

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“…(Recke 2011, p. 62) A variety of different methods are available for analysing brand positioning. Backhaus et al 2016). Backhaus et al 2016).…”

Section: Analysing Brand Positioning By Means Of Positioning Modelsmentioning

confidence: 99%

“…Backhaus et al 2016), leading to ideal brands which are presented in the analysis as ideal vectors or ideal points (cf. The aim of MDS is to present brands in a space with as few dimensions as possible, in which the relative position of the brands reflects their similarity or dissimilarity.…”

Section: Brand Positioning Based On Multidimensional Scaling (Mds)mentioning

confidence: 99%

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Identity-Based Brand Management

Burmann

Riley

Halaszovich

et al. 2017

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“…As redox processes seem to be very distinct in the studied groundwaters (masking other processes), a limited parameter set (b) was defined that does not include ions which are strongly affected by redox processes. (> 0.9) and constant values were excluded, outliers were eliminated (next neighbour method) and list-wise deletion was carried out (following Backhaus et al, 2016). Then, a Euclidian distance measure was applied and five clusters were chosen based on visual inspection of the scree plot elbow criterion (Cattell, 1966).…”

Section: Discussionmentioning

confidence: 99%

Aquifer configuration and geostructural links control the groundwater quality in thin-bedded carbonate–siliciclastic alternations of the Hainich CZE, central Germany

Kohlhepp

Lehmann

Seeber

et al. 2017

Hydrol. Earth Syst. Sci.

105

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Abstract. The quality of near-surface groundwater reservoirs is controlled, but also threatened, by manifold surfacesubsurface interactions. Vulnerability studies typically evaluate the variable interplay of surface factors (land management, infiltration patterns) and subsurface factors (hydrostratigraphy, flow properties) in a thorough way, but disregard the resulting groundwater quality. Conversely, hydrogeochemical case studies that address the chemical evolution of groundwater often lack a comprehensive analysis of the structural buildup. In this study, we aim to reconstruct the actual spatial groundwater quality pattern from a synoptic analysis of the hydrostratigraphy, lithostratigraphy, pedology and land use in the Hainich Critical Zone Exploratory (Hainich CZE). This CZE represents a widely distributed yet scarcely described setting of thin-bedded mixed carbonatesiliciclastic strata in hillslope terrains. At the eastern Hainich low-mountain hillslope, bedrock is mainly formed by alternated marine sedimentary rocks of the Upper Muschelkalk (Middle Triassic) that partly host productive groundwater resources. Spatial patterns of the groundwater quality of a 5.4 km long well transect are derived by principal component analysis and hierarchical cluster analysis. Aquifer stratigraphy and geostructural links were deduced from lithological drill core analysis, mineralogical analysis, geophysical borehole logs and mapping data. Maps of preferential recharge zones and recharge potential were deduced from digital (soil) mapping, soil survey data and field measurements of soil hydraulic conductivities (K s ). By attributing spatially variable surface and subsurface conditions, we were able to reconstruct groundwater quality clusters that reflect the type of land management in their preferential recharge areas, aquifer hydraulic conditions and cross-formational exchange via caprock sinkholes or ascending flow. Generally, the aquifer configuration (spatial arrangement of strata, valley incision/outcrops) and related geostructural links (enhanced recharge areas, karst phenomena) control the role of surface factors (input quality and locations) vs. subsurface factors (water-rock interaction, cross-formational flow) for groundwater quality in the multi-layered aquifer system. Our investigation reveals general properties of alternating sequences in hillslope terrains that are prone to forming multilayered aquifer systems. This synoptic analysis is fundamental and indispensable for a mechanistic understanding of ecological functioning, sustainable resource management and protection.

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Multivariate Analysemethoden

Cited by 279 publications

References 0 publications

Limiting parental feedback disrupts vocal development in marmoset monkeys

Limiting parental feedback disrupts vocal development in marmoset monkeys

Identity-Based Brand Management

Aquifer configuration and geostructural links control the groundwater quality in thin-bedded carbonate–siliciclastic alternations of the Hainich CZE, central Germany

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