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Articles 16201 - 16230 of 16838
Full-Text Articles in Physical Sciences and Mathematics
Photolithographic Patterning Of Vacuum-Deposited Organic Light Emitting Devices, Peifang Tian, P. E. Burrows, S. E. Forrest
Photolithographic Patterning Of Vacuum-Deposited Organic Light Emitting Devices, Peifang Tian, P. E. Burrows, S. E. Forrest
Peifang Tian
We demonstrate a photolithographic technique to fabricate vacuum-deposited organic light emitting devices. Photoresist liftoff combined with vertical deposition of the emissive organic materials and the metal cathode, followed by oblique deposition of a metal cap, avoids the use of high processing temperatures and the exposure of the organic materials to chemical degradation. The unpackaged devices show no sign of deterioration in room ambient when compared with conventional devices fabricated using low-resolution, shadow mask patterning. Furthermore, the devices are resistant to rapid degradation when operated in air for extended periods. This work illustrates a potential foundation for the volume production of …
A Vegetation Based Approach To Biodiversity Gap Analysis In The Agastyamalai Region, Western Ghats, India, B. R. Ramesh, Shaily Menon, Kamaljit S. Bawa
A Vegetation Based Approach To Biodiversity Gap Analysis In The Agastyamalai Region, Western Ghats, India, B. R. Ramesh, Shaily Menon, Kamaljit S. Bawa
Shaily Menon
Protected areas in India have historically been established on an ad hoc basis with little attention to the conservation value of an area. This study focuses on a set of protected areas in the Agastyamalai region of the Western Ghats (WG), India. We examine forest loss and land-use changes in the study area from the early 1900s to 1960 and from 1960 to 1990. We use GIS to perform a biodiversity gap analysis of the protected areas in the study site. We produce a detailed map of existing floristic types and use it to generate layers corresponding to floristic species …
A Simple Formula For Pi, V. Adamchik, Stan Wagon
A Simple Formula For Pi, V. Adamchik, Stan Wagon
Stan Wagon, Retired
No abstract provided.
Compactness-Like Operator Properties Preserved By Complex Interpolation, Karen Saxe
Compactness-Like Operator Properties Preserved By Complex Interpolation, Karen Saxe
Karen Saxe
No abstract provided.
The Role Of The Library In The Computerized Campus, Ryan Johnson, Sonya Shepherd, A. Mccrory
The Role Of The Library In The Computerized Campus, Ryan Johnson, Sonya Shepherd, A. Mccrory
Sonya S. Gaither
No abstract provided.
Evaluating The Impact Of The Focus Model On The Efficacy Levels Of Teachers: A Field Based Study, John Fraas, Gary Russell, Isadore Newman
Evaluating The Impact Of The Focus Model On The Efficacy Levels Of Teachers: A Field Based Study, John Fraas, Gary Russell, Isadore Newman
John W. Fraas
No abstract provided.
Voltammetric Studies Of Metallofullerenes, Mark Anderson
Voltammetric Studies Of Metallofullerenes, Mark Anderson
Mark R. Anderson
No abstract is available at this time.
Voltammetry And Spectroelectrochemistry Of Metallofullerenes, Mark Anderson, Harry Dorn, Paul Burbank, James Gibson
Voltammetry And Spectroelectrochemistry Of Metallofullerenes, Mark Anderson, Harry Dorn, Paul Burbank, James Gibson
Mark R. Anderson
No abstract is currently available.
Putting Statistics Into Logistics, Caroline Lubert
Putting Statistics Into Logistics, Caroline Lubert
Caroline P Lubert
No abstract provided.
Taking Eco-Efficiency To A New Level (Reviewing Ernst Von Weizsäcker, Amory B. Lovins, And L. Hunter Lovins, Factor Four: Doubling Wealth, Halving Resource Use (1997)), John Dernbach
John C. Dernbach
No abstract provided.
Green And Ampt Infiltration With Redistribution, Fred L. Ogden
Green And Ampt Infiltration With Redistribution, Fred L. Ogden
Fred L. Ogden
Distributed, physically based watershed and irrigation advance models require robust infiltration estimation capabilities. The empirical Green and Ampt (GA) equation of infiltration is a popular method for estimating infiltration. The GA parameters have physical basis and considerable prior research has focused on relating these parameters to soil textural classification. However, the original GA method is limited in that it is applicable only for a single ponding period. An explicit Green and Ampt redistribution (GAR) technique is developed herein to estimate interstorm redistribution of soil water and allow multiple ponding simulations using the GA methodology. Soil water redistribution during interponding periods …
The Hanle Effect As A Diagnostic Of Magnetic Fields In Stellar Envelopes I. Theoretical Results For Integrated Line Profiles., R. Ignace, K. H. Nordsieck, J. P. Cassinelli
The Hanle Effect As A Diagnostic Of Magnetic Fields In Stellar Envelopes I. Theoretical Results For Integrated Line Profiles., R. Ignace, K. H. Nordsieck, J. P. Cassinelli
Richard Ignace
The Hanle effect concerns the modification of polarized resonance-line scattering by magnetic fields; thus, it can be used as a diagnostic of stellar magnetic fields. The Hanle effect has been used to determine the field strength and distribution of magnetic structures present in prominences of the Sun. To investigate its potential use in stellar astronomy, the simplified case of an optically thin axisymmetric ring illuminated by a stellar point source is considered. The results are then used to derive the polarization from polar plumes, equatorial disks, and spherical shells. The integrated line polarization is calculated for axisymmetric rings with a …
Inference Of Steady Stellar Wind V(R) Laws From Optically Thin Emission Lines I. Idealised Analysis For The Profile Of A Single Line., J. C. Brown, L. L. Richardson, J. P. Cassinelli, R. Ignace
Inference Of Steady Stellar Wind V(R) Laws From Optically Thin Emission Lines I. Idealised Analysis For The Profile Of A Single Line., J. C. Brown, L. L. Richardson, J. P. Cassinelli, R. Ignace
Richard Ignace
Abstract The form of the profile Flambda_0__({DELTA}λ) of an emission line from a steady spherical wind of velocity profile v(r) is derived for the case when optical depths are small, when stellar occultation of the wind is neglected, and when v(r) is highly supersonic. It is shown how the resulting integral equation for v(r), given Flambda_0__ ({DELTA}λ), can be inverted to yield v(r) if the line emissivity function j(r) is known. Solutions are demonstrated for simulated data in the case of a recombination line (j{prop.to}n^2^) for various trial forms of v(r). The solution is unique provided dv/dr does not change …
A Hamiltonian System With An Even Term, Gregory S. Spradlin
A Hamiltonian System With An Even Term, Gregory S. Spradlin
Gregory S. Spradlin
No abstract provided.
Statistics For Logisticians, Caroline Lubert
Cloning And Conservation Of Biological Diversity: Paradox, Panacea, Or Pandora's Box?, Shaily Menon, Kamaljit Bawa, Leah Gorman
Cloning And Conservation Of Biological Diversity: Paradox, Panacea, Or Pandora's Box?, Shaily Menon, Kamaljit Bawa, Leah Gorman
Shaily Menon
The success of a Scottish team in cloning a mammal from an adult tissue cell has generated considerable speculation in the popular press about potential applications to conservation biology. Possibilities that have been mentioned include cloning endangered species and creating gene banks for the germplasm of rare species. Sensational or inaccurate reports might encourage the mistaken notion that cloning technology is more advanced or reliable than it actually is. More important, such reports might foster the myth that there is no longer an urgency to conserve endangered species or their habitats as long as we have frozen germplasm and cloning …
Conjugate Schema In Genetic Search, Sanza Kazadi
Conjugate Schema In Genetic Search, Sanza Kazadi
Sanza Kazadi
An Automated Robot Calibration System, P. Robinson, P. Orzechowski, P. James, Caroline Lubert
An Automated Robot Calibration System, P. Robinson, P. Orzechowski, P. James, Caroline Lubert
Caroline P Lubert
No abstract provided.
Applications Of Geographic Information Systems, Remote-Sensing, And A Landscape Ecology Approach To Biodiversity Conservation In The Western Ghats, Shaily Menon, Kamaljit S. Bawa
Applications Of Geographic Information Systems, Remote-Sensing, And A Landscape Ecology Approach To Biodiversity Conservation In The Western Ghats, Shaily Menon, Kamaljit S. Bawa
Shaily Menon
The mountains along the west coast of peninsular India, the Western Ghats, constitute one of the unique biological regions of the world. Rapidly occurring land-cover and land-use change in the Western Ghats has serious implications for the biodiversity of the region. Both landscape changes as well as the distribution of biodiversity are phenomena with strong spatial correlates. Recent developments in remote-sensing technology and Geographic Information Systems (GIS) allow the use of a landscape ecology and spatial analysis approach to the problem of deforestation and biodiversity conservation in the Western Ghats. Applications of this approach include analyses of land-cover and land-use …
Features Of The Photon Statistics Of Two Coupled Electromagnetic Field Modes Under The Conditions Of Strong Mode Coupling, Mikhail E. Veisman, Serguei Y. Kalmykov
Features Of The Photon Statistics Of Two Coupled Electromagnetic Field Modes Under The Conditions Of Strong Mode Coupling, Mikhail E. Veisman, Serguei Y. Kalmykov
Serge Youri Kalmykov
The probabilities of transitions between the Fock states of two electromagnetic field modes under the influence of coupling between modes of finite duration are investigated. It is shown that the transition probability is a strongly oscillating function of the mode numbers of the photons. Under conditions in which the coupling frequency exceeds the geometric mean of the mode frequencies (strong coupling), large numbers of photons are excited in the mode with the lower frequency. The excitation of a two-dimensional radiation field oscillator and the ‘‘red’’ symmetry of the transition probabilities can be attributed to instability of the classical two-dimensional oscillator …
Synthesis Of [15n,15n‘]-N,N,N‘,N‘-Tetramethyl- Ethylenediamine And Its Use In Solvation Studies Of [6li]-N-Butyllithium., Delia Waldmüller, Barbara Kotsatos, Michael Nichols, Paul Williard
Synthesis Of [15n,15n‘]-N,N,N‘,N‘-Tetramethyl- Ethylenediamine And Its Use In Solvation Studies Of [6li]-N-Butyllithium., Delia Waldmüller, Barbara Kotsatos, Michael Nichols, Paul Williard
Michael A Nichols
No abstract provided.
Jual Obat Penggugur Kandungan Kabupaten Landak 082328881996 Obat Aborsi Di Kabupaten Landak, Dr Rama
Jual Obat Penggugur Kandungan Kabupaten Landak 082328881996 Obat Aborsi Di Kabupaten Landak, Dr Rama
dr rama
A Surface-Emitting Vacuum-Deposited Organic Light Emitting Device, V. Bulovic, Peifang Tian, P. E. Burrows, M. R. Gokhale, S. R. Forrest, M. E. Thompson
A Surface-Emitting Vacuum-Deposited Organic Light Emitting Device, V. Bulovic, Peifang Tian, P. E. Burrows, M. R. Gokhale, S. R. Forrest, M. E. Thompson
Peifang Tian
We demonstrate a vacuum-deposited organic light emitting device which emits from its top surface through a transparent indium-tin-oxide anode. This device employs a novel protective cap layer which prevents damage to the organic layers during sputter deposition of the anode, while also improving hole injection. Mechanisms of current transport and carrier injection from the contacts are investigated. This device configuration allows for integration of organic light emitting devices with n-channel field effect transistors used in display active matrix backplanes.
Production Of Η Mesons In Double Pomeron Exchange, Alec Schramm, Daniel Reeves
Production Of Η Mesons In Double Pomeron Exchange, Alec Schramm, Daniel Reeves
Alec J Schramm
We estimate the production cross section for ηc and ηb mesons via Pomeron-Pomeron fusion in peripheral heavy-ion collisions. Total and elastic PP cross sections are calculated in an equivalent Pomeron approximation.
The Voltammetry Of Mn@C82, Mark Anderson, Harry Dorn, Paul Burbank, James Gibson
The Voltammetry Of Mn@C82, Mark Anderson, Harry Dorn, Paul Burbank, James Gibson
Mark R. Anderson
No abstract is currently available.
Timing And Extent Of Late Quaternary Paleolakes In The Trans-Pecos Closed Basin, West Texas And South-Central New Mexico, David Wilkins, Donald Currey
Timing And Extent Of Late Quaternary Paleolakes In The Trans-Pecos Closed Basin, West Texas And South-Central New Mexico, David Wilkins, Donald Currey
David E. Wilkins
The Trans-Pecos Closed Basin is a hydrographically closed region covering 20,000 km centered on Salt Basin, 160 km east of El Paso, Texas. Geomorphic and limnetic evidence have been used to identify four major highstands for Lake King during the last glacial maximum (LGM). Additional geomorphic features from a second, recently identified, paleolake, Lake Sacramento, have been found in the Beargrass subbasin, a nested subbasin approximately 75 km northwest of Salt Basin. Radiocarbon ages of the organic material in Lake King sediments date four abrupt climate changes and rapid lacustrine transgressions during the LGM with a quasi-periodicity of 2000 yr. …
Ac-Mode Atomic Force Microscope Imaging In Air And Solutions With A Thermally Driven Bimetallic Cantilever Probe, Andrew C. Hillier, Allen J. Bard
Ac-Mode Atomic Force Microscope Imaging In Air And Solutions With A Thermally Driven Bimetallic Cantilever Probe, Andrew C. Hillier, Allen J. Bard
Andrew C. Hillier
An ac imaging mode for atomic force microscopy ~AFM! has been developed that employs a thermally driven bimetallic cantilever to sense surface topography. Oscillations are induced in a composite cantilever, comprising a Si3N4 layer and Au overcoat, by local heating with a resistive wire heater placed in close proximity to the cantilever. Cantilever bending occurs upon heating due to the difference in thermal expansion coefficients of the Si3N4 and Au layers. The magnitude of this bending is a function of the heat input, the cantilever geometry, the frequency of the excitation, and the thermal properties of the surrounding medium. A …
Correlated And Coherent States Of The Two-Dimensional Quantum Oscillator With A Nonstationary Mode Coupling, Mikhail E. Veisman, Serguei Y. Kalmykov
Correlated And Coherent States Of The Two-Dimensional Quantum Oscillator With A Nonstationary Mode Coupling, Mikhail E. Veisman, Serguei Y. Kalmykov
Serge Youri Kalmykov
We investigate the squeezing and correlation phenomena of quantum fluctuations in correlated coherent states of a system of two oscillatory modes with a parametric coupling of the coordinates. In the regime of strong coupling between the modes, we discover an excitation and a strong correlation of the quantum fluctuations. The matrix of dispersions and covariances of the coordinates and momenta is found explicitly with the help of the method of the linear quantum integrals of motion.
Effects Of Low Polymer Content In A Liquid-Crystal Microlens, Toshiaki Nose, Shin Masuda, Susumu Sato, Jianlin Li, Liang-Chy Chien, Philip Bos
Effects Of Low Polymer Content In A Liquid-Crystal Microlens, Toshiaki Nose, Shin Masuda, Susumu Sato, Jianlin Li, Liang-Chy Chien, Philip Bos
Liang-Chy Chien
A small number of bifunctional monomers are mixed with a nematic liquid crystal (LC) and cured with a distributed electric field, which is produced by a circular-hole-patterned electrode structure. A gradient type of lens, that is, a LC microlens, is investigated for various polymer concentrations. Addition of 3% polymer is enough to freeze the gradient-index properties of the structure in the form of a convex lens, and a polymer-stabilized LC microlens is demonstrated. Although a lower concentration of polymer cannot hold the distribution properties in a curing process, it can maintain the variable focus as a nematic material can. The …
Effects Of Low Polymer Content In A Liquid-Crystal Microlens, Toshiaki Nose, Shin Masuda, Susumu Sato, Jianlin Li, Liang-Chy Chien, Philip J. Bos
Effects Of Low Polymer Content In A Liquid-Crystal Microlens, Toshiaki Nose, Shin Masuda, Susumu Sato, Jianlin Li, Liang-Chy Chien, Philip J. Bos
Philip J. Bos
A small number of bifunctional monomers are mixed with a nematic liquid crystal (LC) and cured with a distributed electric field, which is produced by a circular-hole-patterned electrode structure. A gradient type of lens, that is, a LC microlens, is investigated for various polymer concentrations. Addition of 3% polymer is enough to freeze the gradient-index properties of the structure in the form of a convex lens, and a polymer-stabilized LC microlens is demonstrated. Although a lower concentration of polymer cannot hold the distribution properties in a curing process, it can maintain the variable focus as a nematic material can. The …