Notes on the birds of the tidal lowlands and floodplains of South Sumatra province, Indonesia

During an environmental baseline survey of the tidal lowlands and floodplains of South Sumatra Province in 1988-89, a total of 270 bird species was recorded. This paper focuses on wetland species, including those inhabiting swamp forests. No upland forest habitats are found within the region described. The area supports a diverse avifauna, including some globally threatened species that have a core population here, notably Milky Stork Mycteria cinerea, Storm's Stork Ciconia stormi, Lesser Adjutant Leptoptilos javanicus, Black-headed Ibis Threskiomis melanocephatus and Asian Dowitcher Limnodromus semipalmatus. The coast has vital passage and wintering grounds that rank second in importance only to coastal wetlands in Bangladesh for East Palaearctic waders in terms of numbers of birds. Three species were recorded for the first time in Sumatra: Spotted Eagle Aquila clanga, Steppe/Imperial Eagle Aquila nipalensis/heliaca and Spotted Redshank Tringa erythropa, and first Sumatran breeding records were obtained for Javan Pond-heron Ardeola speciosa and White-headed Stilt Himantopus leucocephalus. A few species were observed outside their previously recorded usual habitats. The paper discusses the principal habitats of the area, and the very rapid rate of development that has occurred during the past two decades. Only one wetland area in the province has protection status, Padang-Sugihan. This Wildlife Reserve does not provide habitat for eight out of the eleven globally threatened species recorded in the study area. Consequently the establishment of two additional swamp reserves and bird sanctuary is strongly recommended

Target marketing can help attract city residents

While suburban growth continues, city living is regaining popularity. It is common knowledge that urban neighborhoods often attract young, single professionals, but a more precise identification of potential city dwellers could help cities understand and develop their comparative advantages. Now, perhaps more than ever, cities need to know which people want to live in them and how their vision of urban life may be accommodated by public policy. A common concern expressed among urban mayors is that the quality of their city services, especially schools, stacks up poorly against that of most suburbs. Improving public education is often cited as the key to attracting suburbanites to cities. Enhancing school quality is indeed an important element in any urban revitalization effort, but it may be less critical than is commonly assumed. Consider that households made up of married couples with children under 18 now account for only a quarter of the nation\u27s total, down from 4 in 10 households in 1970

Graph states in phase space

The phase space for a system of $n$ qubits is a discrete grid of $2^{n} \times 2^{n}$ points, whose axes are labeled in terms of the elements of the finite field \Gal{2^n} to endow it with proper geometrical properties. We analyze the representation of graph states in that phase space, showing that these states can be identified with a class of non-singular curves. We provide an algebraic representation of the most relevant quantum operations acting on these states and discuss the advantages of this approach.Comment: 14 pages. 2 figures. Published in Journal of Physics

Distributions of Beryllium 7 and Lead 210, and Soluble Aerosol-Associated Ionic Species Over the Western Pacific: PEM West B, February - March 1994

Aerosol sampling for the determination of the concentrations of soluble ionic species and the natural radionuclides Be-7 and Pb-210 was conducted from the NASA DC-8 over the western Pacific as part of GTE/PEM-West B during February - March 1994. Concentrations of most soluble ionic species in the free troposphere were higher in samples collected on flights originating from Hong Kong and Japan than those collected further east over the open ocean. In both regions the measured concentrations were higher than those found during PEM-West A (fall 1991). Activities of Pb-210, a tracer of air masses influenced by sources on the Asian continent, showed the same patterns. These data indicate the effect of stronger continental outflow from Asia over the western Pacific during the spring compared to fall season. For readily scavenged aerosol-associated species and soluble acidic gases the strongest indications of Asian outflow were restricted to altitudes below 6 km. The distribution of the continental tracer Pb-210 was also compared to those of a large number of gas phase species measured on the DC-8. Relatively strong correlations were found with O3, and peroxyacetylnitrate (PAN), but only during the flights over the remote Pacific. During PEM-West A, similar correlations were seen, but they were stronger near Asia. We believe that correlations are a signature of continental air that has been processed by deep wet convection over land before being advected over the ocean. One flight over the Sea of Japan provided the opportunity to sample upper troposphere/lower stratosphere air in and around a tropopause fold. Concentrations of Be-7 reached 7 pCi/cu m STP, and peak O3, mixing ratios of 480 ppb were encountered at 10.7 km. The Be-7 data are used to estimate the fraction of stratospheric air mixed down into the troposphere by circulation in the fold

Optimality of broken extremals

In this paper we analyse the optimality of broken Pontryagin extremal for an n-dimensional affine control system with a control parameter, taking values in a k- dimensional closed ball. We prove the optimality of broken normal extremals when n = 3 and the controllable vector fields form a contact distribution, and when the Lie algebra of the controllable fields is locally orthogonal to the singular locus and the drift does not belong to it. Moreover, if k = 2, we show the optimality of any broken extremal even abnormal when the controllable fields do not form a contact distribution in the point of singularity.Comment: arXiv admin note: text overlap with arXiv:1610.0675

Objectively measured physical activity among treatment seeking children and adolescents with severe obesity and normal weight peers

Background: Treatment seeking children and adolescents with severe obesity often experience barriers to physical activity. Studies objectively measuring physical activity in this group and investigating explanatory factors for physical activity levels could inform clinical practice. Objectives: This study aimed to compare objectively measured physical activity levels among treatment seeking children and adolescents with severe obesity and normal weight peers, and to investigate explanatory factors for time spent in moderate physical activity and vigorous physical activity among children and adolescents with severe obesity. Methods: Children with severe obesity (n = 85) were matched 1:1 by age, gender, and the season for accelerometer measurements with normal weight peers (n = 85). Children wore accelerometers for seven consecutive days, yielding measures of physical activity, sleep duration and timing. Parents reported on screen time, parental body mass index and participation in organized sports. Results: Children and adolescents with severe obesity spent significantly less time in moderate physical activity (12 min, p < 0.001) and vigorous physical activity (21 min, p < 0.001) per day compared to normal weight peers. No difference for time spent in sedentary activity was found between groups. For participants with severe obesity, age ≤12 years (p = 0.009) and participation in organized sports (p = 0.023) were related to more moderate physical activity, while age ≤12 years (p = 0.038) and early sleep timing (p = 0.019) were related to more vigorous physical activity. Conclusion: Children and adolescents with severe obesity were less physically active than their normal weight peers. Factors related to more moderate and vigorous physical activity in children with severe obesity were lower age, participation in organized sports and earlier sleep timing.publishedVersio

Spectral Properties of Hydrated Poorly Crystalline Materials for Spectral Analysis of the Moon and Mars

Visible/near-infrared (VNIR) reflectance spectra of both Mars [1] and the Moon [2] include hydration bands that vary across the planet and are not well explained in some cases. Poorly crystalline phases have been found at ~30-70 wt.% by CheMin in Gale crater, Mars in all samples measured to date [3]. Here we report on VNIR reflectance spectra of a large collection of amorphous and poorly crystalline materials. These include opal, allophane, imogolite, iron hydroxides/ oxyhydroxides (FeOx), and several synthetic materials containing Si, Al and/or Fe. All of these contain hydration bands due to water and OH that can be used to identify these materials remotely on planetary bodies