Noise properties of direct current SQUIDs with quasiplanar YBa2Cu3O7 Josephson junctions

We describe the noise performance of dc SQUIDs fabricated with quasiplanar ramp‐type Josephson junctions on the basis of c‐axis‐oriented YBa2Cu3O7/PrBa2Cu3O7 thin‐film heterostructures. The noise spectrum of the dc SQUIDs was measured with dc‐ and ac‐bias schemes at different temperatures and showed values below 10−5 Φ0/Hz1/2 down to frequencies of about 1 Hz at 70 K. Up to now for the magnetic fluxnoise and the energy resolution obtained at 1 kHz and 77 K the best values were 2.5×10−6, Φ0/Hz1/2 and 3×10−31 J/Hz, respectively. A study of the white and 1/fnoises of the SQUIDs was performed. The influence of magnetic flux, bias current, high static magnetic fields, and aging on the SQUID noise were investigated. The junctions and devices do not degrade due to aging in air or thermal cycling

The challenging optics of XtremeD – a neutron diffractometer for high pressures and magnetic fields at ILL developed by Spain

6 páginas, 3 figuras.The Spanish community of neutron scatterers and the ILL are considering the construction of a CRG "extreme conditions Diffractometer (XtremeD)" for both single crystals and powders, operating at high pressures (up to 50 GPa) and high magnetic fields (up to 15 Tesla). High pressure studies require reduced sample volumes. This makes the focusing optics a crucial part of the instrument, in order to have increased flux and to avoid the scattering from the sample environment. The different solutions at different levels of the instrument, which are being studied, will be discussed in this paper.Peer reviewe

Alien Registration- Faley, Henry (Rumford, Oxford County)

https://digitalmaine.com/alien_docs/13582/thumbnail.jp

Voltage-current and voltage-flux characteristics of asymmetric high TC DC SQUIDs

We report measurements of transfer functions and flux shifts of 20 on-chip high T$_C$ DC SQUIDs half of which were made purposely geometrically asymmetric. All of these SQUIDs were fabricated using standard high T$_C$ thin film technology and they were single layer ones, having 140 nm thickness of YBa$_2$Cu$_3$O$_{7-x}$ film deposited by laser ablation onto MgO bicrystal substrates with 24$^0$ misorientation angle. For every SQUID the parameters of its intrinsic asymmetry, i. e., the density of critical current and resistivity of every junction, were measured directly and independently. We showed that the main reason for the on-chip spreading of SQUIDs' voltage-current and voltage-flux characteristics was the intrinsic asymmetry. We found that for SQUIDs with a relative large inductance ($L>120$ pH) both the voltage modulation and the transfer function were not very sensitive to the junctions asymmetry, whereas SQUIDs with smaller inductance ($L\simeq 65-75$ pH) were more sensitive. The results obtained in the paper are important for the implementation in the sensitive instruments based on high T$_C$ SQUID arrays and gratings.Comment: 11 pages, 4 tables, 17 figures This version is substantially modified. The Introduction and Section 2 are completely rewritten, while experimental part is mainly the same as in previous versio

E-mail Workplace Privacy Issues in an Information- and Knowledge-based Environment

Alan D. Smith, Ph.D., is professor of operations management, Department of Management & Marketing, Robert Morris College, Pittsburgh, PA 15219-3099. Robert A. Faley, Ph. D., is professor of management, Graduate School of Management, Kent State University, Kent, OH 44242-0001

A Student-Centric Approach to Large Introductory IS Survey Courses

Both instructors and students dread large introductory courses. IS introductory courses are no exception as they are often too large, the material too dry and the atmosphere too impersonal. This paper describes a unique student-centric curriculum for delivering introductory IS survey courses that keep students interested and engaged while producing high-quality learning outcomes. In the classroom, students experience a relaxed atmosphere created by dimming the lights, playing tropical music, and joining in friendly banter with the professor. At random times game shows are initiated; the winning contestants are rewarded with tokens that can be redeemed in an online-gift catalogue. Outside of class students complete prerequisite exercises at their own pace, submit homework assignments up to three times and take the quizzes according to their own schedule. In designing this curriculum three objectives are met: 1) students enjoy the classroom experience, 2) students have greater control over the learning process, and 3) students master more difficult material. All this is accomplished using a proprietary online classroom management application called Orion. We believe that prerequisite exercises are likely to have a positive impact on student\u27s test scores

Mies van der Rohe: de Algonquin a 860|880 Lake shore drive, 1948-1951: relación entre plantas y sus elementos definitivos

El objeto de estudio presentado es la relación entre dos obras del arquitecto Mies van der Rohe ubicadas en la ciudad de Chicago en Estado Unidos: los apartamentos Algonquin y los edificios 860|880 Lake Shore Drive. Ambos proyectos estuvieron en manos del arquitecto y su equipo entre los años 1948 y 1951 como parte de las obras construidas en conjunto con el promotor inmobiliario Herbert Greenwald. Pese adiversos puntos en común entre las dos obras, como el hecho de estar en la misma ciudad, ser desarrolladas por el mismo promotor inmobiliario, mismo grupo de colaboradores y mismo programa de viviendas en edificio en altura, el resultado final fue bastante diferente. Los 6 bloques de 14 plantas con estructura porticada de hormigón armado y cerramientos de ladrillo a la altura del antepecho de los Algonquin aparentemente en nada se parecen a las torres gemelas de Lake Shore Drive con 26 plantas, estructura de acero revestida por hormigón y fachadas de vidrio y acero. Sin embargo Joseph Fujikawa que fue discípulo y colaborador en el despacho de Mies, entrevistado por el CCA "Canadian Centre of Architecture" comentó que ya tenían todos las semillas del 860 cuando empezaran con Algonquin. Al interpretar la frase de Fujikawa como el nacimiento del 860|880 en los poco conocidos edificios Algonquin y con el objetivo de identificar puntos de esta relación a través del estudio de documentos iniciales de ambos proyectos es que surge la inspiración para del presente trabajo. Este estudio hace parte de la conclusión del curso que sigue la línea de investigación I - La Forma Moderna del Máster de Teoría y Práctica del Proyecto de Arquitectura de la ETSAB - Escola Tècnica Superior d’Arquitectura de Barcelona, de que tiene como objetivo profundizar el conocimiento de la obra de autores de referencia y formación en las técnicas de investigación

Analysis of the Liberian Ebola Survivors Support System (ESSS)

A systems theoretical analysis to capture the evolution and transition of the network systems supporting Ebola survivors and their affected communities, during the 2014-15 Ebola outbreak and recovery phases. The qualitative analysis includes a literature review, archival review, and interviews with representatives of key actors operating in strategic action fields. This paper uses a series of Diagrams that visually illustrate the various complex phases and their network changes that occurred and were established during the outbreak. This case analysis provides crucial phase information that both captures the historical events that informed the systems changes, including the development of the Ebola Survivors’ Support System (ESSS). Secondly, this analysis acts as, a model of understanding how disease support networks first emerge and can be better supported in other outbreaks