24,650 research outputs found
George C. Martin Papers - Accession 271 - M117 (149-150)
No full textThe George C. Martin Papers includes Civil War correspondence between George Canning Martin and his wife, Sarah Jane, from May 1862 to August 1864. Subjects include camp life, the progress of the war in North Carolina and Virginia, and the physical and mental condition of the Confederate soldiers (such as ill health, poor food, and depression). Also included are tax receipts, pension records, newspapers clippings (1863), a commonplace book belonging to Robert Smith, and a memoir (author unknown).https://digitalcommons.winthrop.edu/manuscriptcollection_findingaids/1290/thumbnail.jp
Conversational agent use in a café
No full textAnonymised transcripts of conversational agent use in a café that were used for the following publication:
Martin Porcheron, Joel E. Fischer, and Sarah Sharples. 2017. “Do Animals Have Accents?”: Talking with Agents in Multi-party Conversation. In Proceedings of the 20th ACM Conference on Computer-Supported Cooperative Work & Social Computing (CSCW ’17). ACM, New York, NY, USA. https://doi.org/10.1145/2998181.299829
Soricidae G. Fischer 1814
No full textFamily SORICIDAE G. Fischer, 1814 <p>REMARK</p> <p> Only five shrews belonging to three species were captured during both expeditions (Table 2). However, according to Grubb <i>et al.</i> (1998) only one of these species has previously been recorded from the Volta Region.</p>Published as part of <i>Decher, Jan, Norris, Ryan W., Abedi-Lartey, Michael, Oppong, James, Hutterer, Rainer, Weinbrenner, Martin, Koch, Martin, Podsiadlowski, Lars & Kilpatrick, C. William, 2021, A survey of small mammals in the Volta Region of Ghana with comments on zoogeography and conservation, pp. 253-281 in Zoosystema 43 (14)</i> on page 260, DOI: 10.5252/zoosystema2021v43a14, <a href="http://zenodo.org/record/4783781">http://zenodo.org/record/4783781</a>
Martin Andersen Nexø
No full textThis is a short presentation of the main works of the Danish author Martin Andersen Nexø
Lockheed Martin Dedication Ceremony of the John C. Stennis Space Center
No full textLockheed Martin Dedication Ceremony of the John C. Stennis Space Center with Roy Estess, Bill Hansen, Ronnie Musgrove, Trent Lott, Gene Taylor, and Roderick Pullman
Binuclear Complexes as Models for Adjacent-Metal Involvement in C−H Bond-Cleavage and C−C Bond-Formation Steps Relevant to Fischer−Tropsch Chemistry
No full textBinuclear Complexes as Models for Adjacent-Metal
Involvement in C−H Bond-Cleavage and C−C
Bond-Formation Steps Relevant to Fischer−Tropsch
Chemistr
Binuclear Complexes as Models for Adjacent-Metal Involvement in C−H Bond-Cleavage and C−C Bond-Formation Steps Relevant to Fischer−Tropsch Chemistry
No full textBinuclear Complexes as Models for Adjacent-Metal
Involvement in C−H Bond-Cleavage and C−C
Bond-Formation Steps Relevant to Fischer−Tropsch
Chemistr
Bioenergetics of early life-history stages of the brachyuran crab Cancer setosus in response to changes in temperature
Full text linkIn many marine invertebrates, a latitudinal cline in egg size is considered an adaptive response to a decrease in temperature, and enhances the energetic fitness of their larvae at hatching. However, the amount of energy carried over from the egg to the larval stage depends on the metabolic efficiency of egg development. In the present study, eggs of the brachyuran crab Cancer setosus were sampled for their dry mass (DM), carbon (C), nitrogen (N), and fatty acid (FA) content throughout development from blastula stage until hatching of zoea 1-larvae at Antofagasta (23°S) and Puerto Montt 41°S (Chile) under different temperature treatments (12, 16 and 19 °C). Hatching zoea 1 larvae contained 60 ± 3% of the initial blastula egg C content, regardless of site or temperature. However, the ontogenetic decrease in egg C content was to a significantly higher extend based on the utilization of energy-rich FA at 12 °C (? 1.16 µg/egg) compared to the 19 °C treatments in Antofagasta and Puerto Montt (? 0.63 to ? 0.73 µg FA per egg). At 19 °C egg-metabolism was based to a substantial extend on protein, which allowed for the saving of energy-richer lipids. We conclude that the production of larger eggs with high FA content appears to be adaptive not only to fuel the larval development, but is also a response to the prolonged egg developmental times at lower temperatures.<br/
Cotyle rufigula G. A. Fischer & Reichenow 1884
No full textCotyle rufigula G.A. Fischer & Reichenow, 1884a: 53. Now: Ptyonoprogne rufigula rufigula (G.A. Fischer & Reichenow, 1884). Nec Cotyle fuligula (Lichtenstein, MHC, 1842); see Mayr & Greenway (1960: 104) and remarks below. Holotype: ZMH 6906 (Fischer no. 860), skin, former mount, male, collected at “Naiwascha (Massai)(1500–200 Meter Höhe)”, 12.06.[18]83. Type locality: “ Naiwascha (Massai) (1500–200 Meter Höhe)” [near Lake Naivasha (elevation 1500–2000m), Nakuru County, Kenya], from the original description as well as locality of the holotype. Remarks: In the original description no type was chosen nor were inventory numbers for specimens provided, but measurements for one specimen and the locality “Naiwascha See ” were given. Fischer (1884) listed one specimen (no. 860) for this species, so ZMH 6906 is the holotype. The specimen was also mentioned as the type in Bolau (1898). Fischer & Reichenow (1884a) clearly described the differences of the newly described species from Cotyle fuligula (Lichtenstein, MHC, 1842). The species was formerly placed in Hirundo and treated as H. fuligula fusciventris by White (1961: 62), (rufigula being preoccupied by Hirundo rufigula Bocage, 1878), but when placed in Ptyonoprogne the name rufigula is no longer preoccupied, and Ptyonoprogne fuligula rufigula is used by many authorities including Mayr & Greenway (1960) and Dickinson & Christidis (2014). Meanwhile del Hoyo & Collar (2016) split the African Rock Martin into two species: the tropical African P. rufigula (Red-throated Rock Martin) and the southern African P. fuligula (Large Rock Martin). It is impossible to say where at Naivasha the holotype was collected; as being a bird of cliffs and gorges it would have been unlikely to be found near the lake itself. It is far more likely that it would have been collected close to Hell’s Gate National Park (towards Mount Suswa) where it is locally abundant, also on 12 June 1883 Fischer was retreating from the Masai and was south of the lake at approximately 1°05’S, 36°21’E (see Fischer 1885b, c).Published as part of Frahnert, Sylke, Turner, Donald A. & Bracker, Cordula, 2023, Type specimens and type localities of birds (Aves) collected by Gustav Adolf Fischer (1848 - 1886) in East Africa, pp. 1-84 in Zootaxa 5334 (1) on page 36, DOI: 10.11646/zootaxa.5334.1.1, http://zenodo.org/record/826135
Neural Network Modelling of Constrained Spatial Interaction Flows
Full text linkFundamental to regional science is the subject of spatial interaction. GeoComputation - a new research paradigm that represents the convergence of the disciplines of computer science, geographic information science, mathematics and statistics - has brought many scholars back to spatial interaction modeling. Neural spatial interaction modeling represents a clear break with traditional methods used for explicating spatial interaction. Neural spatial interaction models are termed neural in the sense that they are based on neurocomputing. They are clearly related to conventional unconstrained spatial interaction models of the gravity type, and under commonly met conditions they can be understood as a special class of general feedforward neural network models with a single hidden layer and sigmoidal transfer functions (Fischer 1998). These models have been used to model journey-to-work flows and telecommunications traffic (Fischer and Gopal 1994, Openshaw 1993). They appear to provide superior levels of performance when compared with unconstrained conventional models. In many practical situations, however, we have - in addition to the spatial interaction data itself - some information about various accounting constraints on the predicted flows. In principle, there are two ways to incorporate accounting constraints in neural spatial interaction modeling. The required constraint properties can be built into the post-processing stage, or they can be built directly into the model structure. While the first way is relatively straightforward, it suffers from the disadvantage of being inefficient. It will also result in a model which does not inherently respect the constraints. Thus we follow the second way. In this paper we present a novel class of neural spatial interaction models that incorporate origin-specific constraints into the model structure using product units rather than summation units at the hidden layer and softmax output units at the output layer. Product unit neural networks are powerful because of their ability to handle higher order combinations of inputs. But parameter estimation by standard techniques such as the gradient descent technique may be difficult. The performance of this novel class of spatial interaction models will be demonstrated by using the Austrian interregional traffic data and the conventional singly constrained spatial interaction model of the gravity type as benchmark. References Fischer M M (1998) Computational neural networks: A new paradigm for spatial analysis Environment and Planning A 30 (10): 1873-1891 Fischer M M, Gopal S (1994) Artificial neural networks: A new approach to modelling interregional telecommunciation flows, Journal of Regional Science 34(4): 503-527 Openshaw S (1993) Modelling spatial interaction using a neural net. In Fischer MM, Nijkamp P (eds) Geographical information systems, spatial modelling, and policy evaluation, pp. 147-164. Springer, Berlin
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