Die Sulka : ein Beitrag zur Ethnographie von Neu-Pommern

Das Gebiet der Sulka erstreckte sich früher vom Monde-Flusse (nordöstlich vom Zungenspitzenkap) bis zum Neit-Flusse (am Kap Oxford). In letzter Zeit jedoch wurde der Sulkastamm immer mehr von den Eingeborenen im Innern der Gazelle, den Gaktei), bis zum Mu-Flusse zurückgedrängt. ..

Non-Invasive Measurement of Frog Skin Reflectivity in High Spatial Resolution Using a Dual Hyperspectral Approach

Background:Most spectral data for the amphibian integument are limited to the visible spectrum of light and have been collected using point measurements with low spatial resolution. In the present study a dual camera setup consisting of two push broom hyperspectral imaging systems was employed, which produces reflectance images between 400 and 2500 nm with high spectral and spatial resolution and a high dynamic range.Methodology/Principal Findings:We briefly introduce the system and document the high efficiency of this technique analyzing exemplarily the spectral reflectivity of the integument of three arboreal anuran species (Litoria caerulea, Agalychnis callidryas and Hyla arborea), all of which appear green to the human eye. The imaging setup generates a high number of spectral bands within seconds and allows non-invasive characterization of spectral characteristics with relatively high working distance. Despite the comparatively uniform coloration, spectral reflectivity between 700 and 1100 nm differed markedly among the species. In contrast to H. arborea, L. caerulea and A. callidryas showed reflection in this range. For all three species, reflectivity above 1100 nm is primarily defined by water absorption. Furthermore, the high resolution allowed examining even small structures such as fingers and toes, which in A. callidryas showed an increased reflectivity in the near infrared part of the spectrum.Conclusion/Significance:Hyperspectral imaging was found to be a very useful alternative technique combining the spectral resolution of spectrometric measurements with a higher spatial resolution. In addition, we used Digital Infrared/Red-Edge Photography as new simple method to roughly determine the near infrared reflectivity of frog specimens in field, where hyperspectral imaging is typically difficult. © 2013 Pinto et al

Tracking the Dollars: How Economic Impact Studies Can Actually Benefit Managerial Decision Making

Almost every month brings another attention-grabbing headline about a city or country considering a bid for a major sporting or entertainment event. Politicians, business executives, and excited fans weigh in about the possible costs and benefits, with limited numbers provided about the possible economic impact, and even less said about how these numbers were calculated. Most recently, LeBron James’ return to Cleveland was estimated by Bloomberg to boost the city’s economy by $215 million annually, while Cuyahoga County’s projections were more than double this number. A concert of Jay-Z and Beyonce in Baltimore in 2013 was estimated by the local newspapers to have an economic impact of between$20 million and $40 million. In these cases (as with so many others), these numbers were highly debated and many of our management colleagues were quick to dismiss the estimated size of the impact. Yet, as we get distracted by the discussion of how high the impact of a particular sport or entertainment event might be, we lose track of the more important question: What lessons can sport and entertainment executives learn from these studies? The first author of this article has been involved with over 50 sport industry economic impact studies, including analyses of the NBA All-Star game, the Dallas Cowboys’ new stadium, the NCAA Men’s Final Four basketball tournament, Singapore Grand Prix Formula 1 race, and the India Premier League, to name a few

Plasma arginine vasopressin concentrations in epileptics under monotherapy

Plasma arginine vasopressin concentrations were determined by radio-immunoassay in 112 adult epileptics who were taking carbamazepine, phenytoin, primidone, or sodium valproate in long-term monotherapy, and in 19 controls. No significant difference was found between the groups, but some epileptics taking carbamazepine and primidone showed low values. Serum concentrations of carbamazepine did not correlate with the concentrations of plasma arginine vasopressin. In conclusion, there was no evidence of a stimulating effect of chronic carbamazepine medication or a special inhibiting effect of phenytoin on the release of vasopressin arginine from the posterior pituitary

The Use of Public Funds for Private Benefit: An Examination of the Relationship between Public Stadium Funding and Ticket Prices in the National Football League

During the past decade there has been a proliferation of sports stadia being built in America’s municipal districts. While it used to be common for the public to fully fund stadium construction projects, over the past 20 years factors such as political motives, tax reform, and increased public awareness of tax equity have forced sports teams to share increasing amounts of the financial burden (Crompton, Howard, & Var, 2003). As public funding for stadia construction has decreased, franchises have continued to strive for maximized profits. Concurrently, the cost of attending events in sports stadia has increased for consumers in terms of higher ticket prices even though changes in fixed costs should not affect pricing (Leeds & von Allmen, 2004). The purpose of this study was to examine the relationship between the use of public funds to build stadia and the profit maximizing goals of National Football League (NFL) franchises. A hypothesis was formulated that stated the impact of the public share of the construction cost would have no effect on relative ticket prices for those that consume the product. The cross-sectional data for a ticket price model, which consisted of seasonal data from every NFL team to play from 1991 through 2003, was investigated. The results showed an increase in public funding by 10% lowers ticket prices by 42 cents. As shown, the bulk of the variation in ticket prices was due to a general increase over time and MSA per capita income

Assessing the contribution of understory sun-induced chlorophyll fluorescence through 3-D radiative transfer modelling and field data

A major international effort has been made to monitor sun-induced chlorophyll fluorescence (SIF) from space as a proxy for the photosynthetic activity of terrestrial vegetation. However, the effect of spatial heterogeneity on the SIF retrievals from canopy radiance derived from images with medium and low spatial resolution remains uncharacterised. In images from forest and agricultural landscapes, the background comprises a mixture of soil and understory and can generate confounding effects that limit the interpretation of the SIF at the canopy level. This paper aims to improve the understanding of SIF from coarse spatial resolutions in heterogeneous canopies by considering the separated contribution of tree crowns, understory and background components, using a modified version of the FluorFLIGHT radiative transfer model (RTM). The new model is compared with others through the RAMI model intercomparison framework and is validated with airborne data. The airborne campaign includes high-resolution data collected over a tree-grass ecosystem with the HyPlant imaging spectrometer within the FLuorescence EXplorer (FLEX) preparatory missions. Field data measurements were collected from plots with a varying fraction of tree and understory vegetation cover. The relationship between airborne SIF calculated from pure tree crowns and aggregated pixels shows the effect of the understory at different resolutions. For a pixel size smaller than the mean crown size, the impact of the background was low (R2 > 0.99; NRMSE 0.2). This study demonstrates that using a 3D RTM model improves the calculation of SIF significantly (R2 = 0.83, RMSE = 0.03 mW m−2 sr−1 nm−1) when the specific contribution of the soil and understory layers are accounted for, in comparison with the SIF calculated from mixed pixels that considers only one layer as background (R2 = 0.4, RMSE = 0.28 mW m−2 sr−1 nm−1). These results demonstrate the need to account for the contribution of SIF emitted by the understory in the quantification of SIF within tree crowns and within the canopy from aggregated pixels in heterogeneous forest canopies

Responses of woody species to spatial and temporal ground water changes in coastal sand dune systems

In spite of the relative importance of groundwater in costal dune systems, studies concerning the responses of vegetation to ground water (GW) availability variations, particularly in Mediterranean regions, are scarce. Thus, the main purpose of this study is to compare the responses of co-occurring species possessing different functional traits, to changes in GW levels (i.e. the lowering of GW levels) in a sand dune ecosystem. For that, five sites were established within a 1 km<sup>2</sup> area in a meso-mediterranean sand dune ecosystem dominated by a <i>Pinus pinaster</i> forest. Due to natural topographic variability and anthropogenic GW exploitation, substantial variability in depth to GW between sites was found. Under these conditions it was possible to identify the degree of usage and dependence on GW of different plant species (two deep-rooted trees, a drought adapted shrub, a phreatophyte and a non-native woody invader) and how GW dependence varied seasonally and between the heterogeneous sites. Results indicated that the plant species had differential responses to changes in GW depth according to specific functional traits (i.e. rooting depth, leaf morphology, and water use strategy). Species comparison revealed that variability in pre-dawn water potential (Ψ<sub>pre</sub>) and bulk leaf δ<sup>13</sup>C was related to site differences in GW use in the deep-rooted (<i>Pinus pinaster, Myrica faya</i>) and phreatophyte (<i>Salix repens</i>) species. However, such variation was more evident during spring than during summer drought. The exotic invader, <i>Acacia longifolia</i>, which does not possess a very deep root system, presented the largest seasonal variability in Ψ<sub>pre</sub> and bulk leaf δ<sup>13</sup>C. In contrast, the response of <i>Corema album</i>, an endemic understory drought-adapted shrub, seemed to be independent of water availability across seasons and sites. Thus, the susceptibility to lowering of GW due to anthropogenic exploitation, in plant species from sand dunes, is variable, being particularly relevant for deep rooted species and phreatophytes, which seem to depend heavily on access to GW

High-throughput field phenotyping reveals genetic variation in photosynthetic traits in durum wheat under drought

Chlorophyll fluorescence (ChlF) is a powerful non-invasive technique for probing photosynthesis. Although proposed as a method for drought tolerance screening, ChlF has not yet been fully adopted in physiological breeding, mainly due to limitations in high-throughput field phenotyping capabilities. The light-induced fluorescence transient (LIFT) sensor has recently been shown to reliably provide active ChlF data for rapid and remote characterisation of plant photosynthetic performance. We used the LIFT sensor to quantify photosynthesis traits across time in a large panel of durum wheat genotypes subjected to a progressive drought in replicated field trials over two growing seasons. The photosynthetic performance was measured at the canopy level by means of the operating efficiency of Photosystem II ((Formula presented.)) and the kinetics of electron transport measured by reoxidation rates ((Formula presented.) and (Formula presented.)). Short- and long-term changes in ChlF traits were found in response to soil water availability and due to interactions with weather fluctuations. In mild drought, (Formula presented.) and (Formula presented.) were little affected, while (Formula presented.) was consistently accelerated in water-limited compared to well-watered plants, increasingly so with rising vapour pressure deficit. This high-throughput approach allowed assessment of the native genetic diversity in ChlF traits while considering the diurnal dynamics of photosynthesis