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Wyszukujesz frazę "Smith, K." wg kryterium: Wszystkie pola


Tytuł:
Neural network models for combinatorial optimization : a survey of deterministic, stochastic and chaotic approaches
Autorzy:
Smith, K.
Potvin, J.
Kwok, T.
Powiązania:
https://bibliotekanauki.pl/articles/205943.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
chaos
odwzorowanie samoporządkujące
optymalizacja kombinatoryczna
sieć Hopfielda
sieć neuronowa
combinatorial optimization
deformable templates
Hopfield networks
neural networks
self-organizing maps
Opis:
This paper serves as a tutorial on the use of neural networks for solving combinatorial optimization problems. It reviews the two main classes of neural network models : the gradient-based neural networks such as the Hopfield network, and the deformable template approaches such as the elastic net method and self organizing maps. In each class, the original model is presented, its limitations discussed, and subsequent developments and extensions are reviewed. Particular emphasis is placed on stochastic and chaotic variations on the neural network models designed to improve the optimization performance. Finally, the performance of these neural network models is compared and discussed relative to other heuristic approaches.
Źródło:
Control and Cybernetics; 2002, 31, 2; 183-216
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contemporary sites of contemplation: contemplative nature of the aesthetic experience of natural and transformed landscape in Roden Crater by James Turrell and Lucid Stead by Philip K. Smith
Autorzy:
Issa, Nadia
Powiązania:
https://bibliotekanauki.pl/articles/914208.pdf
Data publikacji:
2019-07-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
contemporary art
land art
James Turrell
Philip K. Smith
Opis:
The aim of this paper is to offer an interpretation of two contemporary art works: James Turrell’s Roden Crater and Philip K. Smith’s Lucid Stead. They are seen as projects that may be qualified as examples of art based on the artists’ playing with light. The claim being that one of the factors that engenders a contemplative attitude on behalf of the beholder is the presence of light in relation to the artwork’s structure.
Źródło:
Polish Journal of Landscape Studies; 2019, 2, 4-5; 99-105
2657-327X
Pojawia się w:
Polish Journal of Landscape Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Middle Miocene carnivorans from the Monarch Mill Formation, Nevada
Autorzy:
Smith, K.
Czaplewski, N.
Cifelli, R.L.
Powiązania:
https://bibliotekanauki.pl/articles/21605.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Middle Miocene
Miocene
carnivore
Mammalia
Mustelidae
Canidae
Ailuridae
Felidae
Monarch Mill Formation
Nevada
Opis:
The lowest part of the Monarch Mill Formation in the Middlegate basin, west-central Nevada, has yielded a middle Miocene (Barstovian Land Mammal Age) vertebrate assemblage, the Eastgate local fauna. Paleobotanical evidence from nearby, nearly contemporaneous fossil leaf assemblages indicates that the Middle Miocene vegetation in the area was mixed coniferous and hardwood forest and chaparral-sclerophyllous shrubland, and suggests that the area had been uplifted to 2700–2800 m paleoaltitude before dropping later to near its present elevation of 1600 m. Thus, the local fauna provides a rare glimpse at a medium- to high-altitude vertebrate community in the intermountain western interior of North America. The local fauna includes the remains of fish, amphibians, reptiles, birds, and 25 families of mammals. Carnivorans, the focus of this study, include six taxa (three of which are new) belonging to four families. Canidae are represented by the borophagine Tomarctus brevirostris and the canine Leptocyon sp. indet. The earliest record and second North American occurrence of the simocyonine ailurid Actiocyon is represented by A. parverratis sp. nov. Two new mustelids, Brevimalictis chikasha gen. et sp. nov. and Negodiaetictis rugatrulleum gen. et sp. nov., may represent Galictinae but are of uncertain subfamilial and tribal affinity. The fourth family is represented by the felid Pseudaelurus sp. indet. Tomarctus brevirostris is limited biochronologically to the Barstovian land mammal age and thus is consistent with the age indicated by other members of the Eastgate local fauna as well as by indirect tephrochronological dates previously associated with the Monarch Mill Formation. Actiocyon parverratis sp. nov. extends the temporal range of the genus Actiocyon from late Clarendonian back to the Barstovian. The Eastgate local fauna improves our understanding of mammalian successions and evolution, during and subsequent to the Mid-Miocene Climatic Optimum (~14–17 Ma).
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new genus of eomyid rodent from the Miocene of Nevada
Autorzy:
Smith, K S
Cifelli, R.L.
Czaplewski, N.J.
Powiązania:
https://bibliotekanauki.pl/articles/21894.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Megapeomys
Miocene
eomyid rodent
Apeomys
Rodentia
Nevada
Eomyidae
new genus
rodent
paleontology
Apeomyoides
Opis:
The description of a new genus (Apeomyoides) of eomyid rodent from the Miocene of Nevada increases the diversity of known taxa, enhances the geographic range, and extends the biochronology for the Apeomyinae (Eomyidae). Three groups of Eomyidae are known from the fossil record of North America. Of the three groups, Neogene taxa include four genera representing the Eomyinae and two genera representing the Apeomyinae; no genera of the subfamily Yoderimyinae are known from the Neogene of the continent. This diversity represents a significant reduction of eomyid taxa compared to the Paleogene, from which 17 genera of eomyines and three genera of yoderimyines are known. In Eurasia, 11 genera of eomyids occurred during the Neogene, with a few taxa that persisted until about 2 million years before present. At present, there are no known eomyids from the last 4.5 million years of the Neogene in North America. Apeomyoides savagei is referable to the subfamily Apeomyinae based on several key structures of the teeth and mandible. This new eomyid is part of the Eastgate local fauna, collected from volcanic ash deposits of the Monarch Mill Formation, Churchill County, Nevada. Apeomyoides has an occlusal pattern that shares characteristics of apeomyines from both North America (Megapeomys and Arikareeomys) and Eurasia (Apeomys and Megapeomys). The unique occlusal pattern and large size of Apeomyoides demonstrates that not all eomyids from North America were small or that their lineages decreased in size through time. Apeomyoides also may provide evidence, which challenges the hypothesis that eomyids within a single lineage from North America became more lophodont in geologically younger genera.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The rapid identification of NORM discharges requiring regulatory control - a possible screening methodology
Szybka identyfikacja odpadów NORM wymaga nadzoru prawnego - propozycja metodyki kontroli
Autorzy:
Henrich, E.
Janssens, A.
Ryan, T.
Daroussin, J.
Smith, K.
Gerchikov, M.
Powiązania:
https://bibliotekanauki.pl/articles/340339.pdf
Data publikacji:
2004
Wydawca:
Główny Instytut Górnictwa
Tematy:
ochrona radiologiczna
Dyrektywa 96/29/Euratom
prawo ochrony radiologicznej
odpady radioaktywne
radiological protection
Directive 96/29/Euratom
radiological defense low
radioactive wastes
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 69-71
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The endocranium of the theropod dinosaur Ceratosaurus studied with computer tomography
Autorzy:
Sanders, R K
Smith, D.K.
Powiązania:
https://bibliotekanauki.pl/articles/22430.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
cranial pneumatic system
Ceratosaurus
virtual rendering
paleoneurology
Theropoda
theropod dinosaur
computer tomography
dinosaur
endocranium
paleontology
Opis:
A well preserved specimen of the theropod Ceratosaurusfrom the Upper Jurassic Morrison Formation of western Colorado was recently described and given the name C. magnicornis. The systematics of the genus is outside the scope of the present study but, as a generally accepted basal tetanuran, the braincase was CT scanned to provide a description of the endocranium, inner ear, pneumatic, and venous sinus systems in a primitive member of this clade. Five major subregions of the theropod endocranium are distinguished for the purpose of simplifying cranial computed tomographic interpretation and to provide a systematic means of comparison to other endocrania. The skull morphology of Ceratosaurus influences the overall braincase morphology and the number and distribution of the major foramina. The low pontine angle and relatively unflexed braincase is considered a more primitive character. The orientation of the horizontal semicircular canal confirms a rather horizontal and unerect posture of the head and neck. As in birds, the narrower skull morphology of Ceratosaurusis associated with fewer cranial nerve foramina. Additionally, the maxillary dominated dentigerous upper jaw of Ceratosaurusis felt to share with the alligator a large rostrally directed maxillary division of the trigeminal nerve and a small ophthalmic branch. The upper bill of birds, being dominated by the premaxillary and lacking teeth, is innervated predominantly by the ophthalmic division of the trigeminal nerve. For this reason, avian−based cranial nerve reconstructions are felt to be inappropriate for basal theropods.Ceratosaurusskull pneumatization and possible evidence of olfactory conchal structures is on the other hand very avian in character. Based on computed tomography, Ceratosaurusis determined to have possessed a typical basal theropod endocranium and bipedal vestibular system similar to Allosaurus.
Źródło:
Acta Palaeontologica Polonica; 2005, 50, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The radiological impact of NORM industries in the UK
Narażenie radiacyjne od naturalnych substancji promieniotwórczych, powodowane przez przemysł w Wielkiej Brytanii
Autorzy:
Smith, K.
Warner Jones, S.
Oatway, W.
Jones, J.
Harvey, M.
Shaw, P.
Mobbs, S.
Powiązania:
https://bibliotekanauki.pl/articles/340686.pdf
Data publikacji:
2004
Wydawca:
Główny Instytut Górnictwa
Tematy:
ochrona radiologiczna w Wielkiej Brytanii
dopuszczalna dawka promieniowania
NORM
radiological protection in United Kingdom
permissible radiation dose
norm
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 85-86
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bivalve Characterization Using Synchrotron Micro X-Ray Fluorescence
Autorzy:
Jones, K.
Bronson, S.
Brink, P.
Gordon, C.
Mosher-Smith, K.
Brown, M.
Chaudhry, S.
Rizzo, A.
Sigismondi, R.
Whitehurst, M.
Lukaszewski, A.
Kranz, D.
Bland, K.
Gordan, D.
Lobel, J.
Sullivan, J.
Metzger, M.
O'Shea, C.
Harris, C.
Arezzo, R.
Kambhampati, M.
Powiązania:
https://bibliotekanauki.pl/articles/1808352.pdf
Data publikacji:
2009-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
01.40.-d
07.85.Qe
82.80.Ej
87.59.-e
Opis:
Bivalves, oysters, mussels, and clams are important constituents of riverine and estuarine ecosystems. Their shells and soft tissues provide information on the environments in which they live. Since they are filter feeders, they also are factors in improving water quality through removal of particulate matter from the water column. Finally, they are a valuable food source that has substantial economic value. Hence, characterization of shells and soft tissues is useful for improved understanding of these factors. Here, we used X-ray microprobes and computed microtomography facilities at the Brookhaven National Synchrotron Light Source to investigate elemental distributions in bivalves taken from locations around New York, Washington, DC, and New Orleans, LA. The results form the initial basis for compilation of a database of relevant parameters that can serve for tracking environmental changes and for assessing toxicity of particular metals. The work was enabled by active collaboration with students from the several regions, community groups, and research scientists. The collaboration was facilitated through use of web conferencing between Brookhaven National Laboratory and the varied locations.
Źródło:
Acta Physica Polonica A; 2009, 115, 2; 477-481
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moment inequalities for sums of certain independent symmetric random variables
Autorzy:
Hitczenko, P.
Montgomery-Smith, S.
Oleszkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/1220145.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
This paper gives upper and lower bounds for moments of sums of independent random variables $(X_k)$ which satisfy the condition $P(|X|_k ≥ t) = exp(-N_k(t))$, where $N_k$ are concave functions. As a consequence we obtain precise information about the tail probabilities of linear combinations of independent random variables for which $N(t) = |t|^r$ for some fixed 0 < r ≤ 1. This complements work of Gluskin and Kwapień who have done the same for convex functions N.
Źródło:
Studia Mathematica; 1997, 123, 1; 15-42
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Linear Model for Uniformity Trial Experiments
Autorzy:
Shukla, Alok K.
Yadav, Subhash K.
Misra, Govind Ch.
Powiązania:
https://bibliotekanauki.pl/articles/465826.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
Fairfield Smith’s Variance Law
linear model
uniformity trial experiments
Opis:
Uniformity trial experiments are required to assess fertility variation in agricultural land. Several models have appeared in literature, of which Fairfield Smith’s Variance Law assuming a nonlinear relationship between the coefficient of variation (C.V.) and a plot size has been extensively used in uniformity trial studies. A linear model has been proposed for uniformity trial experiments and it has shown better results as compared to existing models. The expression for point of maximum curvature for the proposed model is much simpler as compared to the model of Fairfield Smith. The appropriateness of the proposed model has also been verified with the help of a data set.
Źródło:
Statistics in Transition new series; 2013, 14, 1; 161-170
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canonical distributions and phase transitions
Autorzy:
Athreya, K
Smith, J
Powiązania:
https://bibliotekanauki.pl/articles/729916.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
canonical distribution
canonical ensemble
Gibbs state
phase transition
entropy maximization
Rényi entropy
Opis:
Entropy maximization subject to known expected values is extended to the case where the random variables involved may take on positive infinite values. As a result, an arbitrary probability distribution on a finite set may be realized as a canonical distribution. The Rényi entropy of the distribution arises as a natural by-product of this realization. Starting with the uniform distributionon a proper subset of a set, the canonical distribution of equilibriumstatistical mechanics may be used to exhibit an elementary phase transition, characterized by discontinuity of the partition function.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2000, 20, 2; 167-176
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early Eocene frogs from Vastan Lignite Mine, Gujarat, India
Autorzy:
Folie, A.
Rana, R.S.
Rose, K.D.
Sahni, A.
Kumar, K.
Singh, L.
Smith, T.
Powiązania:
https://bibliotekanauki.pl/articles/20353.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Amphibia
Bombinatoridae
Ranidae
Pelobatidae
Rhacophoridae
Eocene
Early Eocene
frog
Vastan Lignite Mine
Gujarat
India
Opis:
The Ypresian Cambay Shale Formation of Vastan Lignite Mine in Gujarat, western India, has yielded a rich vertebrate fauna, including the earliest modern mammals of the Indian subcontinent. Here we describe its assemblage of four frogs, including two new genera and species, based on numerous, diverse and well−preserved ilia and vertebrae. An abundant frog, Eobarbourula delfinoi gen. and sp. nov., with a particular vertebral articulation similar to a zygosphene−zygantrum complex, represents the oldest record of the Bombinatoridae and might have been capable of displaying the Unken reflex. The large non−fossorial pelobatid Eopelobates, known from complete skeletons from the Eocene and Oligocene of Europe, is also identified at Vastan based on a single nearly complete ilium. An abundant “ranid” and a possible rhacophorid Indorana prasadi gen. and sp. nov. represent the earliest records of both families. The Vastan pelobatids and ranids confirm an early worldwide distribution of these families, and the bombinatorids and rhacophorids show possible origins of those clades on the Indian subcontinent.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-reported methicillin-resistant Staphylococcus aureus infection in USA pork producers
Autorzy:
Leedom, Larson K R
Smith, T.C.
Donham, K.J.
Powiązania:
https://bibliotekanauki.pl/articles/51288.pdf
Data publikacji:
2010
Wydawca:
Instytut Medycyny Wsi
Tematy:
pork production
pork producer
USA
animal farm
pig
agricultural worker
human disease
infection
methicillin-resistant Staphylococcus aureus
Staphylococcus aureus
Źródło:
Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 331-334
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł

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