6,342 research outputs found
Soil and permafrost distribution, soil characterisation and soil vulnerability to human foot trampling, Wright Valley, Antarctica
No full textSoils and shallow permafrost in Wright Valley, Antarctica were mapped at a scale of 1:50 000 to depict their spatial distribution, and sampled to determine the main drivers for the soil classification.
In the cold desert of Wright Valley the Gelisol order of Soil Taxonomy was used to classify the soils. Soils on younger surfaces, associated with Lower Wright Glacier, Upper Wright Glacier and alpine glaciers, contain massive ice within 100 cm of the soil surface and are classified as Glacic Haplorthels or Glacic Haploturbels where there is field evidence of cryoturbation. As a generalization, at either end of the valley, soil moisture recharge from moist coastal air masses (eastern end) and blowing snow drifts maintain the depth to permafrost in which ice-cement occurs at 70 cm, are classified as Salic or Typic Anhyorthels or, where there is field evidence of cryoturbation, Anhyturbels.
While mapping soils in Wright Valley, the distribution and nature of the shallow permafrost were also investigated. Three classes of permafrost were established to coincide with definitions or conditions within Soil Taxonomy viz: permafrost with ice-cement at 70 cm, and massive ice.
A definition for a petrosalic horizon is proposed based on the properties of a salic horizon and the indurated nature of petrocalcic/petrogypsic horizons. The horizon is likely to occur only in the cold desert climate zones of Antarctica.
A rapid method to determine soil vulnerability to human foot traffic was developed. As vulnerability is the product of disturbance and rehabilitation, the method is based on the disturbance of 10 foot prints at a site multiplied by a soil rehabilitation factor based on the soil weathering stage. Although fine-grained aeolian sands are easily disturbed they also rehabilitate rapidly in the windy conditions of Wright Valley. In contrast, old stable soils have a tight cobbly desert pavement with reddish desert varnish and often show less foot print disturbance. When cobbles are overturned, however, fresh rock with thick salt accumulations and without desert varnish is exposed. It takes much time for the desert varnish to re-establish.
The spatial distribution of Soil Taxonomy soil classes, nature of the permafrost and soil vulnerability to human traffic are presented as three separate maps at 1:50 000 scale and as live GIS files
Norms in Science
No full textWeingart P. Norms in Science. In: Wright JD, ed. International Encyclopedia of the Social & Behavioral Sciences. Vol 17. 2nd. Oxforf: Elsevier; 2015: 11-14
Southeast Asia: Sociocultural Aspects
No full textEvers H-D. Southeast Asia: Sociocultural Aspects. In: Wright JD, ed. International Encyclopedia of the Social & Behavioral Sciences. 2. ed. Amsterdam: Elsevier; 2015: 70-74
Transformation of the endostyle of the anadromous sea lamprey, Petromyzon-marinus L, during metamorphosis .2. Electron-microscopy
No full textPT: J; CR: BARRINGTON EJW, 1956, Q J MICROSC SCI, V97, P393 BARRINGTON EJW, 1975, INTRO GENERAL COMP E BEAMISH FWH, 1975, J ZOOL, V177, P57 BENCOSME SA, 1959, J BIOPHYS BIOCHEM CY, V5, P508 CHENG H, 1974, AM J ANAT, V141, P537 CLEMENTSMERLINI M, 1960, J MORPHOL, V106, P337 COLEMAN R, 1968, GEN COMP ENDOCR, V10, P34 CORDIER AC, 1976, AM J ANAT, V146, P339 DAEMS WT, 1969, LYSOSOMES, V1, P64 EGEBERG J, 1965, Z ZELLFORSCH MIKROSK, V68, P102 ETKIN W, 1968, METAMORPHOSIS PROBLE, P313 FINSTAD J, 1964, J EXP MED, V120, P1151 FOX H, 1970, J EMBRYOL EXP MORPH, V24, P139 FOX H, 1973, Z ZELLFORSCH, V130, P371 FUJITA H, 1966, Z ZELLFORSCH MIKROSK, V73, P559 FUJITA H, 1968, GEN COMP ENDOCR, V11, P111 FUJITA H, 1969, Z ZELLFORSCH, V98, P525 FUJITA H, 1972, ARCH HISTOL JAPON, V34, P109 FUJITA H, 1975, ARCH HISTOL JPN, V37, P277 FUJITA H, 1975, INT REV CYTOL, V40, P197 GOOD RA, 1972, BIOL LAMPREYS, V2, P405 GORBMAN A, 1962, TXB COMP ENDOCRINOLO HELMINEN HJ, 1971, J ULTRASTRUCT RES, V36, P708 HENDERSON NE, 1971, GEN COMP ENDOCR, V16, P409 HILFER SR, 1964, J MORPHOL, V115, P135 HILFER SR, 1977, J CELL BIOL, V75, P446 HOHEISEL G, 1969, GEGENBAURS MORPHOL J, V114, P204 HOHEISEL G, 1970, MORPHOL JB, V114, P337 HOURDRY J, 1969, Z ZELLFORSCH MIKR AN, V101, P527 JAMIESON JD, 1977, INT CELL BIOL, P308 KLINCK GH, 1970, LAB INVEST, V22, P2 KRAENVZEL F, 1933, ARCH BIOL LIEGE, V44, P469 KRUPP PP, 1977, ANAT REC, V187, P495 LANZING WJR, 1959, STUDIES RIVER LAMPRE LEACH JW, 1939, J MORPHOL, V65, P549 LUFT JH, 1961, J BIOPHYS BIOCH CYTO, V9, P409 MANASEK FJ, 1969, J EMBRYOL EXP MORPH, V21, P271 MARINE D, 1913, J EXP MED, V17, P379 MILLONIG G, 1961, J APPL PHYS, V32, P1637 MOLLENHAUER HH, 1964, STAIN TECHNOL, V39, P111 MORRIS GP, 1979, CELL TISSUE RES, V196, P449 NEUENSCHWANDER P, 1972, Z ZELLFORSCH MIKROSK, V130, P553 NEVE P, 1965, J MICROSC-PARIS, V4, P811 NICKERSON PA, 1970, J CELL BIOL, V47, P277 NOVIKOFF AB, 1976, CELLS ORGANELLES NUNEZ EA, 1967, J CELL BIOL, V2, P404 NUNEZ EA, 1976, ANAT REC, V184, P133 OLIN P, 1970, ENDOCRINOLOGY, V87, P1000 OLIVEREAU M, 1952, ARCH ANAT MICROSC EX, V41, P1 OOI EC, 1976, CAN J ZOOL, V54, P1449 OOI EC, 1979, AM J ANAT, V154, P57 PEEK WD, 1979, J MORPHOL, V160, P143 PIPAN N, 1976, CYTOBIOLOGIE, V13, P435 POLLARD B, 1966, PHYLOGENY IMMUNITY, P88 REMY L, 1977, J ULTRASTRUCT RES, V61, P243 REYNOLDS ES, 1963, J CELL BIOL, V17, P208 ROITT IM, 1971, ESSENTIAL IMMUNOLOGY, P211 ROMERT P, 1973, Z ANAT ENTWICKLUNGS, V139, P319 SELJELID R, 1967, J ULTRASTRUCT RES, V17, P195 SELJELID R, 1967, J ULTRASTRUCT RES, V17, P401 SETOGUTI T, 1973, Z ZELLFORSCH MIKROSK, V137, P195 SHEPARD TH, 1967, J CLIN ENDOCR METAB, V27, P945 SHIVELY JN, 1969, AM J VET RES, V30, P219 STERBA G, 1953, WISS Z F SCHILLER MN, V3, P1 STERBA G, 1953, WISS Z F SCHILLER MN, V3, P239 STERBA G, 1961, INT REV GES HYDROBIO, V46, P105 STERBA G, 1962, HDB BINNENFISCHEREI, V3, P263 THIELE J, 1976, CELL TISSUE RES, V168, P133 WATSON ML, 1958, J BIOPHYS BIOCHEM CY, V4, P475 WESSELLS NK, 1971, SCIENCE, V171, P135 WETZEL BK, 1969, ENDOCRINOLOGY, V84, P563 WISSIG SL, 1960, J BIOPHYS BIOCHEM CY, V7, P419 WOLLMAN SH, 1969, LYSOSOMES BIOLOGY PA, V2, P483 WRIGHT G, 1978, AM J ANAT, V152, P263 WRIGHT GM, 1976, GEN COMP ENDOCR, V30, P243 WRIGHT GM, 1977, J EXP ZOOL, V202, P27 WRIGHT GM, 1978, THESIS U TORONTO, P70 YOUSON JH, 1977, CAN J ZOOL, V55, P469 YOUSON JH, 1979, CAN J ZOOL, V57, P1808 YOUSON JH, 1980, CAN J FISH AQUAT SCI, V37; NR: 80; TC: 21; J9: J MORPHOL; PG: 27; GA: KT943Source type: Electronic(1
JD Talasek - Director of Cultural Programs, National Academy of Sciences
No full textPresented in partnership with the President\u27s Office, STEAM3 (Science/Technology/Engineering/Art/Mathematics/Medicine/Music), CELIA (Collaborative Education, Leadership, and Innovation in the Arts), the Department of Art and Art History, and the Department of Music
JD Talasek is the director of cultural programs of the National Academy of Sciences, a program that is focused on the exploration of intersections between science, medicine, technology, and visual culture. He was the creator and organizer of the recent international online symposium on Visual Culture and Bioscience and co-editor of the published transcripts (distributed by D.A.P., March 2009). Talasek holds an M.F.A. in studio arts from the University of Delaware, an M.A. in museum studies from the University of Leicester, and a B.S. in photography from East Texas State University. He has taught photography at the University of Delaware as well as Essex and Howard Community Colleges, and is currently on the faculty at The Johns Hopkins University in the Museum Studies Master’s Program.
Talasek has curated several exhibitions at the National Academy of Sciences, including Visionary Anatomies, which toured through the Smithsonian Institution in 2004 through 2006; Absorption + Transmission: Work by Mike and Doug Starn; The Tao of Physics: Photographs by Arthur Tress; and Cycloids: Paintings by Michael Schultheis. At the University of Delaware, he organized and curated Observations in an Occupied Wilderness: Photographs by Terry Falke and LightBox: The Visual AIDS Archive Project.
He is the art advisor for Issues in Science and Technology magazine, published by the University of Texas at Dallas and The National Academies. Talasek serves on an advisory panel that is exploring the creation of an art exhibition program at the National Museum of Natural History in Washington, DC.
JD Talasek was born in 1966 in Dallas, Texas.https://corescholar.libraries.wright.edu/archives_presidential_lecture_series/1043/thumbnail.jp
Consideration of Interference Correlation Properties in a JD-CDMA Mobile Radio System with Coherent Receiver Antenna Diversity
No full textIn code division multiple access (CDMA) mobile radio systems, both intersymbol interference and multiple access interference arise which can be combatted by using Joint Detection (JD) techniques, to reduce the degradation in performance resulting from time variance, coherent receiver antenna diversity (CRAD) can be used. The application of JD techniques offers the possibility to exploit the knowledge of noise covariances at the receiver. If only intercell (cochannel) interference is considered, the noise covariances in the uplink receiver of a multiple receiver antenna CDMA mobile radio system depend mainly on the directions of arrival (DOAs) of the interfering signals and the receiver antenna placement. Therefore, if the interferer DOAs are known at the base station, these covariances could be estimated. In this thesis, a realistic model of the uplink of a JD CDMA mobile radio system with CRAD is described in which the above mentioned interference cancelling method is used. Simulation results according to this model are given and evaluated.Applied SciencesElectrical EngineeringTelecommunications and Traffic Control Systems Grou
Race: Genetic Aspects
No full textGenetic research has shown that all individuals and populations are different, but no agreement has ever been reached on the number and definition of human races, with proposed races numbering from none to 200. Human genetic differences are patterned in geographical space, but each population harbors a large proportion of the species' diversity and shares with other populations most of its genetic variants. Race remains an important component of our social and psychological world, but envisaging humans as subdivided in genetically differentiated races leads to poor evolutionary inference and to errors in clinical practice
Premotor Cortex
No full textThe frontal lobe of primates consists of two large regions, a rostral region involved in cognitive functions (prefrontal lobe) and a caudal region mostly devoted to motor functions (agranular frontal cortex). This last region is formed, posteriorly, by the primary motor cortex and, anteriorly, by a mosaic of distinct areas called premotor areas. Premotor areas can be subdivided into two main classes: caudal premotor areas and rostral premotor areas. The caudal premotor areas elaborate sensory information for action. The rostral premotor areas appear to play a control role on the caudal areas, relaying to them information from the prefrontal and cingulate cortex on individuals' motivation and long-term plans. In this way, potential motor actions formed in the caudal premotor areas can be executed or not according to the individual's needs
How does adaptive reuse of heritage buildings impact the perceived value and place identity within the community? The case of Tunbridge Wells Opera House
No full textExpert-led narratives in the planning industry often make assumptions about how heritage is defined and overlook the community’s heritage values and place identity in decision-making.
Within this context, the research question asks, ‘how does adaptive reuse of heritage buildings impact the perceived value and place identity within the community? The case of the Tunbridge Wells Opera House.’
This study explores how adaptively reusing the Tunbridge Wells Opera House as a JD Wetherspoon pub impacts its perceived value and identity within the community. It examines whether changes to the heritage building aligns with community values and whether alternative uses could enhance the value.
A case study approach is used to allow for an in-depth and context-specific analysis of heritage values and place identity. A qualitative approach, using questionnaires, will be the primary method for gathering community views, as well as a group interview with Tunbridge Wells Civic Society. Data will be analysed against the conceptual framework developed from the literature review.
Views on the adaptive reuse of the Tunbridge Wells Opera House are expected to vary, with some appreciating the preservation and new function of the building, while others may feel that the new use undermines its historical and cultural value. Older generations, who have experienced the change of the Opera House over time, are likely to be more critical.
The research concludes with evidence and recommendations for policy and decision-makers to guide future adaptive reuse projects to align with community heritage values and place identity
Dairy farmers’ perceptions toward the implementation of on-farm Johne’s disease prevention and control strategies
No full textmplementation of specific management strategies on dairy farms is currently the most effective way to reduce the prevalence of Johne’s disease (JD), an infectious chronic enteritis of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP). However, dairy farmers often fail to implement recommended strategies. The objective of this study was to assess perceptions of farmers participating in a JD prevention and control program toward recommended practices, and explore factors that influence whether or not a farmer adopts risk-reducing measures for MAP transmission. Semi-structured interviews were conducted with 25 dairy farmers enrolled in a voluntary JD control program in Alberta, Canada. Principles of classical grounded theory were used for participant selection, interviewing, and data analysis. Additionally, demographic data and MAP infection status were collected and analyzed using quantitative questionnaires and the JD control program database. Farmers’ perceptions were distinguished according to 2 main categories: first, their belief in the importance of JD, and second, their belief in recommended JD prevention and control strategies. Based on these categories, farmers were classified into 4 groups: proactivists, disillusionists, deniers, and unconcerned. The first 2 groups believed in the importance of JD, and proactivists and unconcerned believed in proposed JD prevention and control measures. Groups that regarded JD as important had better knowledge about best strategies to reduce MAP transmission and had more JD risk assessments conducted on their farm. Although not quantified, it also appeared that these groups had more JD prevention and control practices in place. However, often JD was not perceived as a problem in the herd and generally farmers did not regard JD control as a “hot topic” in communications with their herd veterinarian and other farmers. Recommendations regarding how to communicate with farmers and motivate various groups of farmers according to their specific perceptions were provided to optimize adoption of JD prevention and control measures and thereby increase success of voluntary JD control programs
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