Metal-Free Tandem Beckmann–Electrophilic Aromatic Substitution Cascade Affording Diaryl Imines, Ketones, Amines, and Quinazolines

A cascade reaction sequence involving a Beckmann rearrangement on benzophenone oxime followed by an electrophilic aromatic substitution (EAS) on the intermediate nitrilium ion affords N-phenyl diaryl imines that may then be hydrolyzed to ketones, or reduced to the corresponding amines. Reaction with benzonitrile afforded 2,4-diphenylquinazoline through a Beckmann–Ritter–EAS cascade

The Pentagram, No. 1

Welcome to the verse of a bunch of guys who think writing should be part of every educated man\u27s experience. We are a group sanctioned by none, other than our own selves, sanctioned with our own belief that we have something to say. Spend a few minutes with us. Be you science student, English student, agriculture student, whatever your forte we believe there is interest for you in the following pages. Who are we? Students too. But students egotistical enough to want to have our ideas, any ideas, spread throughout a few minds other than our own. We have talked to ourselves and to each other. Now we want to talk to you. Glance through the following pages. If you see something of value, talk about it.https://scholarworks.sfasu.edu/pentagram/1000/thumbnail.jp

Paper Session I-C - Technology Advances and Developments in Low Power Gallium Arsenide for Space Applications

The evolution of gallium arsenide (GaAs) technology has developed to the point where it is quite suited for low power operation in space. The preliminary requirements for space-based integrated circuit applications are reviewed, and evidence that a GaAs technology known as complementary heterostructure field effect transistors (CHFETs) has proven to meet the demands of the space environment is presented. Further examples of how the complementary GaAs technology has demonstrated the potential for operation in the Gigahertz frequency range using power supply voltages at or below 2.5 Volts are presented. The analog and digital technological needs for space applications are identified and being met by complementary GaAs technologies when compared to commercial-off-the-shelf (COTS) electronics. Emphasis on the manufacturing costs of low power GaAs technologies when compared to those associated with COTS modified for space applications is addressed. Finally, information by both the Air Force and commercial sector concerning the need for low power GaAs technology insertion into future space-based systems is provided

Crustacean fauna

12 p. : ill. ; 26 cm.Includes bibliographical references (p. 11-12)."The only marine Jurassic decapod fauna in North America is found in the Stockade Beaver Member of the Sundance Formation of Wyoming. The preservation of these crustaceans is only moderately good, permitting, at most, identification to the generic level of these soft-shelled decapod shrimp. The faunal assemblage, composed of Antrimpos sp., Bombur sp., Mecochirus sp., a glypheid, and some unidentifiable anomuran remains, can be compared with Triassic and Jurassic material from European deposits, which form part of the biologic continuum of crustaceans throughout the Lower Mesozoic"--P. [1]

Expanding the Operational Use of Total Lightning Ahead of GOES-R

NASA's Shortterm Prediction Research and Transition Center (SPoRT) has been transitioning realtime total lightning observations from groundbased lightning mapping arrays since 2003. This initial effort was with the local Weather Forecast Offices (WFO) that could use the North Alabama Lightning Mapping Array (NALMA). These early collaborations established a strong interest in the use of total lightning for WFO operations. In particular the focus started with warning decision support, but has since expanded to include impactbased decision support and lightning safety. SPoRT has used its experience to establish connections with new lightning mapping arrays as they become available. The GOESR / JPSS Visiting Scientist Program has enabled SPoRT to conduct visits to new partners and expand the number of operational users with access to total lightning observations. In early 2014, SPoRT conducted the most recent visiting scientist trips to meet with forecast offices that will used the Colorado, Houston, and Langmuir Lab (New Mexico) lightning mapping arrays. In addition, SPoRT met with the corresponding Center Weather Service Units (CWSUs) to expand collaborations with the aviation community. These visits were an opportunity to learn about the forecast needs of each office visited as well as to provide onsite training for the use of total lightning, setting the stage for a realtime assessment during MayJuly 2014. With five lightning mapping arrays covering multiple geographic locations, the 2014 assessment has demonstrated numerous uses of total lightning in varying situations. Several highlights include a much broader use of total lightning for impactbased decision support ranging from airport weather warnings, supporting fire crews, and protecting large outdoor events. The inclusion of the CWSUs has broadened the operational scope of total lightning, demonstrating how these data can support air traffic management, particularly in the Terminal Radar Approach Control Facilities (TRACON) region around an airport. These collaborations continue to demonstrate, from the operational perspective, the utility of total lightning and the importance of continued training and preparation in advance of the Geostationary Lightning Mapper

Aberration-free ultra-thin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces

The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength spaced optical antennas. The lenses and axicons consist of radial distributions of V-shaped nanoantennas that generate respectively spherical wavefronts and non-diffracting Bessel beams at telecom wavelengths. Simulations are also presented to show that our aberration-free designs are applicable to high numerical aperture lenses such as flat microscope objectives

Optical diffraction radiation for position monitoring of charged particle beams

In the framework of the future linear collider collaboration (CLIC, ILC), non-intercepting beam monitoring instruments are under development for very low emittance and high charge density beams. Optical diffraction radiation (ODR) was studied and developed during the last years focussing on beam size measurements. We propose in the paper to consider the use of diffraction radiation for ultra relativistic beams as position monitors with applications for the centering of scrapers, collimators and targets with high resolution. We present the experimental results obtained using small aperture slits on the ATF2 extraction beam line at KEK and on the Cornell Electron Storage Ring with 1.2 GeV and 2.1 GeV electrons respectively

The Pentagram, No. 1

Welcome to the verse of a bunch of guys who think writing should be part of every educated man\u27s experience. We are a group sanctioned by none, other than our own selves, sanctioned with our own belief that we have something to say. Spend a few minutes with us. Be you science student, English student, agriculture student, whatever your forte we believe there is interest for you in the following pages. Who are we? Students too. But students egotistical enough to want to have our ideas, any ideas, spread throughout a few minds other than our own. We have talked to ourselves and to each other. Now we want to talk to you. Glance through the following pages. If you see something of value, talk about it.https://scholarworks.sfasu.edu/pentagram/1000/thumbnail.jp