Emerging applications of high temperature superconductors for space communications

Proposed space missions require longevity of communications system components, high input power levels, and high speed digital logic devices. The complexity of these missions calls for a high data bandwidth capacity. Incorporation of high temperature superconducting (HTS) thin films into some of these communications system components may provide a means of meeting these requirements. Space applications of superconducting technology has previously been limited by the requirement of cooling to near liquid helium temperatures. Development of HTS materials with transition temperatures above 77 K along with the natural cooling ability of space suggest that space applications may lead the way in the applications of high temperature superconductivity. In order for HTS materials to be incorporated into microwave and millimeter wave devices, the material properties such as electrical conductivity, current density, surface resistivity and others as a function of temperature and frequency must be well characterized and understood. The millimeter wave conductivity and surface resistivity were well characterized, and at 77 K are better than copper. Basic microwave circuits such as ring resonators were used to determine transmission line losses. Higher Q values than those of gold resonator circuits were observed below the transition temperature. Several key HTS circuits including filters, oscillators, phase shifters and phased array antenna feeds are feasible in the near future. For technology to improve further, good quality, large area films must be reproducibly grown on low dielectric constant, low loss microwave substrates

Strongly First Order Phase Transitions Near an Enhanced Discrete Symmetry Point

We propose a group theoretic condition which may be applied to extensions of the Standard Model in order to locate regions of parameter space in which the electroweak phase transition is strongly first order, such that electroweak baryogenesis may be a viable mechanism for generating the baryon asymmetry of the universe. Specifically, we demonstrate that the viable corners of parameter space may be identified by their proximity to an enhanced discrete symmetry point. At this point, the global symmetry group of the theory is extended by a discrete group under which the scalar sector is non-trivially charged, and the discrete symmetry is spontaneously broken such that the discrete symmetry relates degenerate electroweak preserving and breaking vacua. This idea is used to investigate several specific models of the electroweak symmetry breaking sector. The phase transitions identified through this method suggest implications for other relics such as dark matter and gravitational waves.Comment: 17 pages, 4 figure

Pseudo-Foster Kennedy Syndrome due to unilateral optic nerve hypoplasia: a case report

<p>Abstract</p> <p>Introduction</p> <p>Pseudo-Foster Kennedy Syndrome is described as unilateral optic disc swelling with contralateral optic atrophy in the absence of an intracranial mass causing compression of the optic nerve. This occurs typically due to bilateral sequential optic neuritis or ischaemic optic neuropathy.</p> <p>Case Presentation</p> <p>We describe a case of pseudo-Foster Kennedy Syndrome in a two year old boy with unilateral papilloedema due to a congenital optic disc anomaly in one eye preventing transmission of raised intracranial pressure to the optic nerve.</p> <p>Conclusion</p> <p>From our findings we conclude that congenital optic nerve hypoplasia is a cause of pseudo-Foster Kennedy Syndrome.</p

Treatment trends for retinopathy of prematurity in the UK:active surveillance study of infants at risk

OBJECTIVES: To estimate the incidence of severe retinopathy of prematurity (ROP) requiring treatment and describe current treatment patterns in the UK. DESIGN: Nationwide population-based case ascertainment study via the British Ophthalmic Surveillance Unit and a national collaborative ROP special interest group. Practitioners completed a standardised case report form (CRF). SETTING: All paediatric ophthalmologists providing screening and/or treatment for retinopathy in the UK were invited to take part. PARTICIPANTS: Any baby with ROP treated or referred for treatment between 1 December 2013 and 30 November 2014, treated with laser, cryotherapy, vascular endothelial growth factor (VEGF) inhibitor or vitrectomy/scleral buckling, or a combination. MAIN OUTCOME MEASURE: Incidence of ROP requiring treatment. RESULTS: We received 370 CRFs; 327 were included. Denominator from epidemiological data: 8112 infants with birth weight of <1500 g. The incidence of ROP requiring treatment was 4% (327/8112, 95% CI 3.6% to 4.5%). Median gestational age was 25 weeks (IQR 24.3–26.1), and median birth weight 706 g (IQR 620–821). Median age at first treatment was 80 days (IQR 71–96). 204 right eyes (62.39%) had type 1 ROP, and 27 (8.26%) had aggressive posterior ROP. Infants were also treated for milder disease: 9 (2.75%) right eyes were treated for type 2 ROP, and 74 (22.63%) for disease milder than type 1 with plus or preplus, which we defined here as ‘type 2 plus’ disease. First-line treatment was diode laser photoablation of the avascular retina in 90.5% and injection of VEGF inhibitor in 8%. CONCLUSIONS: ROP treatment incidence in the UK is 2.5 times higher than previously estimated. 8% of treated infants receive intravitreal VEGF inhibitor, currently unlicensed. Research is needed urgently to establish safety and efficacy of this approach. Earlier treatment and increasing numbers of surviving premature infants require an increase in appropriate eye care facilities and staff. TRIAL REGISTRATION NUMBER: NCT02484989

Ursinus College Alumni Journal, July 1955

Commencement address 1955 • The college honors Dr. I. S. Leinbach • Ground broken for the new women\u27s dormitories • News from the registrar\u27s office • Armstrong preaches baccalaureate sermon • Summer program offered again at Ursinus • Meistersingers make spring tour • The magic hour May Day theme • New student union in Bomberger basement • Alpha Phi Omega campus project • Alumni celebrate graduation anniversary • Class of \u2755 elects permanent class officers • Keyser \u2710 and Krug \u2737 honored by educators • Alumni elect new officers for 1955-57 • York County alumni sponsor Noss film • J. A. Hunsicker \u2792 recipient of award • Regional alumni groups hold annual meetings • French Department faculty member active in research • Barbara Yerkes \u2749 teacher and friend of Bristol High students • Sports review • 1955 baseball season • 1955 tennis season • Varsity Club honors outstanding athletes • 1955 women\u27s sports • 1955 track season • Ursinus participates in Ford foundation program for teachers • Alumni participate in Red Lion jubilee • News about ourselves • Weddings • Birthshttps://digitalcommons.ursinus.edu/alumnijournal/1052/thumbnail.jp

Ursinus College Alumni Journal, November 1955

Program for new dormitories underway • Business, the alumnus, and the cost of higher education • Campbell Soup Company establishes fund • James Hirst named to honor society • 18th annual performance announced of the Messiah • Attendance increases in the Ursinus College Evening School • Some notes from the Dean\u27s office • Registrar\u27s report on fall enrollment • Ursinus forum 1955-1956 • Max C. Putney \u2718 author of The Man of Galilee • South Jersey alumni honor Dr. McClure • Binder named Dean at Thiel College • Berks County alumni hold clam bake • Dr. Sherman A. Eger \u2725 describes new operation for high blood pressure • James J. Herron \u2732 elected vice-president of Dun & Bradstreet, Inc. • Alumni eligible for Fulbright scholarships • Ursinus Women\u27s Club • Committee to review alumni constitution • A Fulbrighter in Japan • 1955 Loyalty Fund report • Sick transit - or - She perks no more • Curtain Club presents The Madwoman of Chaillot • Class of \u2756 elects permanent alumni officers • Mrs. Snyder new preceptress at Duryea Hall • G. E. reports on its corporate alumnus program • Regional alumni groups plan student trip • Warren K. Hess \u2731 addresses state school directors • 51\u27ers quartet meet after four years • History art collection • Sports review: Soccer report; Facts about the coaching staff; Alumni varsity basketball game • News about ourselves • Weddings • Births • Necrologyhttps://digitalcommons.ursinus.edu/alumnijournal/1054/thumbnail.jp

Ursinus College Alumni Journal, March 1956

President\u27s page • Sigma Rho scholarship fund grows • Three Ursinus alumni honored at Founders\u27 Day ceremony • $1000 memorial donation from Ursinus Woman\u27s Club • Ford Foundation gives$191,400 to Ursinus College • Enrollment increases in Evening School • Notes from the Dean\u27s office • Ursinus presentation of Messiah recorded • From the Office of Admissions • Faculty corner • Philadelphia alumni to meet at Casa Conti • Plan now to return Alumni Day, June 2 • Spring banquet planned by Lehigh Valley • May 2nd, date for New York alumni • South Jersey alumni plan dinner-dance • Woman\u27s Club plans spring activities • Booster committee holds banquet for athletes • Ditter, Warden, Tredinnick, Assistant District Attorneys • Alumni invited to Varsity Club dinner • Dr. Gilbert Bayne \u2743 speaks to science societies • Isaac Norris of Norristown, PA • Alumni elections • Schoolmen\u27s Week teachers luncheon • Washington area alumni reorganize • Report of the loyalty fund campaign • Sports review: Football season 1955; Dave Burger named to All-American soccer team; Soccer season 1955; Wrestling; 1955 alumnae hockey; Heller and Dawkins excel in women\u27s hockey • News about ourselves • Births • Weddings • Necrologyhttps://digitalcommons.ursinus.edu/alumnijournal/1055/thumbnail.jp

Innovation and trade policy coordination: The role of firm heterogeneity

Recent studies have concluded that R&D grants can induce firms to export and that exporting and innovating can be complementary activities at the firm level. Yet the trade literature has paid little attention to the scope of innovation policy as a stimulus to both trade and innovation. To investigate this question we rely on a general work-horse model of trade and firm heterogeneity with firm investments in R&D activities. The interplay of innovation and trade policies uncover novel results. In particular, we show that the effects of either policy depend on the degree of protectionism in a country. Therefore, countries can respond differently to the same policy, and similarly to different policies. In such a context, different governments may face different trade-offs in achieving a given target