Phased-array antenna phase control circuit using frequency multiplication

Circuit separates out, from multiplied signals, antenna element signals which have desirable phase angles and feeds them to appropriate antenna elements of phased array. System may be used in either transmitting or receiving mode

Phase interpolation circuits using frequency multiplication for phased arrays

Antenna phasing circuit is described with the following advantages - 1/ increased number of phased elements, 2/ current repetition for each array element, 3/ circuit simplicity, and 4/ accurate phase interpolation. This circuit functions with Huggins Scan or with nearly any other phasing system

Phase control circuits using frequency multiplications for phased array antennas

A phase control coupling circuit for use with a phased array antenna is described. The coupling circuit includes a combining circuit which is coupled to a transmission line, a frequency multiplier circuit which is coupled to the combining circuit, and a recombining circuit which is coupled between the frequency multiplier circuit and phased array antenna elements. In a doubler embodiment, the frequency multiplier circuit comprises frequency doublers and the combining and recombining circuits comprise four-port hybrid power dividers. In a generalized embodiment, the multiplier circuit comprises frequency multiplier elements which multiply to the Nth power, the combining circuit comprises four-part hybrid power dividers, and the recombinding circuit comprises summing circuits

Improved circularly polarized antenna

Antenna includes two sets of linearly polarized elements. Each set contains slots in parallel array. Sets are mutually orthogonal and are driven in phase quadrature. By changing lengths of slots or their separations, antenna beamwidth can be changed over wide range. Similar results are achieved with dipole configuration

Non-dispersive optics using storage of light

We demonstrate the non-dispersive deflection of an optical beam in a Stern-Gerlach magnetic field. An optical pulse is initially stored as a spin-wave coherence in thermal rubidium vapour. An inhomogeneous magnetic field imprints a phase gradient onto the spin wave, which upon reacceleration of the optical pulse leads to an angular deflection of the retrieved beam. We show that the obtained beam deflection is non-dispersive, i.e. its magnitude is independent of the incident optical frequency. Compared to a Stern-Gerlach experiment carried out with propagating light under the conditions of electromagnetically induced transparency, the estimated suppression of the chromatic aberration reaches 10 orders of magnitude.Comment: 11 pages, 4 figures, accepted for publication in Physical Review

Oral History Interview: Eleanor Mailloux

This interview is one of a series conducted concerning West Virginia town histories. This interview focuses on Helvetia, West Virginia. Born in Virginia, Ms. Mailloux is the daughter of a Swiss father and Virginian mother. She discusses her life on the farm, work, and school. She relates her concern for the environment to conclude the interview.https://mds.marshall.edu/oral_history/1174/thumbnail.jp

Interpretive Conventions

In Interpretive Conventions, Steven Mailloux provides a general introduction to reader-response criticism while developing his own specific reader-oriented approach to literature. He examines five influential theories of the reading process—those of Stanley Fish, Jonathan Culler, Wolfgang Iser, Norman Holland, and David Bleich. He goes on to argue the need for a more comprehensive reader-response criticism based on a consistent social model of reading. He develops such a reading model and also discusses American textual editing and literary history

Heroism, Terrorism, and the In-Between: The Validation of Violence in V for Vendetta

In Alan Moore and David Lloyd’s V for Vendetta, a graphic novel made up of three installments, the titular character V dons a Guy Fawkes mask in celebration of a man who is historically known as a terrorist. V, though representative of a supposed extremist and violent in his behaviors, exemplifies the traits of a traditional hero rather than a terrorist. The word vendetta defines a person or group seeking vengeance or revenge on another person or group, and though this fits V’s role in the story, a personal vendetta is not the catalyst for his actions. The text examines V’s methods through the lens of supposed terrorism blurred with heroism, or borderline super heroism. The text then follows V through his exhibition of intensely violent behavior throughout the graphic novel, yet provides evidence to show how his actions have a principled justification to them. The text also examines other sources of superheroes from media and popular culture, relating them to V and the subsequent justification of his questionable actions. By looking at the art and written text, the metatextual aspect of the graphic novel are analyzed as well, referring to the author and artist’s intention of furthering V’s innocence of terrorism. The text concludes, through the evidentiary support of other superheroes/ heroes actions as well as in-text evidence, that V did not exhibit an excess of violence, nor did he demonstrate deliberate cruelty, as he often showed care and most always reason when killing his victims

The Effects of Early Intervention on the Expressive Language Outcomes of Children with Autism Spectrum Disorder: A Systematic Review

Background: Autism Spectrum Disorder (ASD) is characterized by persistent challenges in social communication as well as restricted and repetitive behaviors and is often observable in early childhood. Expressive language delays are common in young children diagnosed with ASD. Expressive language includes any form of communicative output, such as verbal language, sign language, and the use of alternative and augmentative communication (AAC). Early intervention, for the purpose of this systematic review, is defined as speech and language services provided before a child is 5 years (60 months) of age. Evidence suggests that early intervention can lead to positive outcomes in the symptoms of children with ASD. Objective: To determine whether early intervention of ASD in children between 0-59 months of age has positive effects on expressive language development. Methods: A systematic search of the PsychINFO, PubMED, CINAHL, ERIC, and LLBA database was conducted, followed by a qualitative analysis of relevant articles. Studies included monolingual (i.e., English) children who were diagnosed with ASD. Studies were systematically graded and processed using inter-rater procedures. Results: Fourteen articles were included based upon inclusionary criteria. The overall quality of the studies was moderate. The most widely used early intervention techniques included the Early Start Denver Model (ESDM) and Pivotal Response Training (PRT). Conclusions: Consistent high-interval (i.e., 25 hours per week), behaviorally-based early intervention (i.e., before 40 months) may lead to positive outcomes in expressive language development. Clinicians working with young children with ASD should implement behaviorally-based, empirically-supported interventions, such as ESDM or PRT. Future research should prioritize high-quality study designs (e.g., randomized control trials) with larger sample sizes of children diagnosed with ASD, which is necessary to discern a direct relationship between behaviorally-based early intervention and expressive language outcomes for children with ASD.https://scholarworks.uvm.edu/csdms/1008/thumbnail.jp

Array phasing device Patent

Apparatus for generating microwave signals at progressively related phase angles for driving antenna arra