The Mach-Zehnder and the Teleporter

We suggest a self-testing teleportation configuration for photon q-bits based on a Mach-Zehnder interferometer. That is, Bob can tell how well the input state has been teleported without knowing what that input state was. One could imagine building a "locked" teleporter based on this configuration. The analysis is performed for continuous variable teleportation but the arrangement could equally be applied to discrete manipulations.Comment: 4 pages, 5 figure

Neuroscience and research on learning and instruction: what kind of knowledge contributes to educational outcome?

Neurowissenschaftliche Ergebnisse besitzen für sich genommen keine Bedeutung für die Gestaltung schulischer Lerngelegenheiten. Die Methoden der Hirnforschung eignen sich weder dazu, Wissensunterschiede zwischen den Lernenden aufzudecken, noch geben sie Anleitung für die Darbietung von Informationen. Ein zukünftiges Potenzial neurowissenschaftlicher Methoden liegt jedoch in der Aufdeckung von Unterschieden in der Informationsverarbeitung, die sich auf der Verhaltensebene nicht beobachten lassen. (DIPF/Orig.)Strictly speaking, results from neuroscience can neither inform educational practice nor can they tell how to design learning environments. Brain imaging methods do not allow drawing conclusions on individual differences in knowledge representation and on appropriate information presentation. However, a future potential of brain imaging is the uncovering of differences in information processing that do not become apparent in behavior. (DIPF/Orig.

Teleportation of bipartite states using a single entangled pair

A class of quantum protocols to teleport bipartite (entangled) states of two qubits is suggested. Our schemes require a single entangled pair shared by the two parties and the transmission of three bits of classical information, as well as a two-qubit gate with an additional qubit at the receiver' location. Noisy quantum channels are considered and the effects on both the teleportation fidelity and the entanglement of the replica are evaluated.Comment: 11 pages, 4 figures, to appear on Phys. Lett.

The Ursinus Weekly, January 17, 1955

Y plans orientation for incoming frosh • Campus Chest drive to start next semester; How chairman • Frosh set dance date for Feb. 18; Headline wrong! • 24 fellowships offered in research • Shake, rattle and roll attended by 500 persons • Lantern expands circulation by 3%; Drive for Spring contributions underway • Lorelei date moved; King to be chosen • Dr. Charles Spotts speaks at vespers on faith, sex, love • MSGA sets parking rules, special areas; Starts Feb. 7 • May Day here soon; Dust off pageants • Pre-med \u2755 program adds new features • Social news • Business meeting follows FTA Freedom to learn • Editorials: Final challenge; More inclusive Dean\u27s list; Kitchen capers • Cagers overpowered by Fords, Dragons, Blue Hens • Grizzlies down Fords in 26-7 mat rout: Dawkins wins 57th by pin; Padula, Knauf gain falls; Paolone tops co-captains • Third team wins opener by 56-27 • Is cramming necessary?https://digitalcommons.ursinus.edu/weekly/1464/thumbnail.jp

Reduction of urate crystal-induced inflammation by root extracts from traditional oriental medicinal plants: elevation of prostaglandin D2 levels

Dried roots of the plants Acanthopanax senticosus, Angelica sinensis and Scutellaria baicalensis are used in traditional oriental medicine and reportedly possess anti-inflammatory properties. Using the murine air pouch model of inflammation, we investigated the efficacy and mode of action of an extract from these three plants in crystal-induced inflammation. Air pouches were raised on the backs of 8-week-old BALB/c mice. Mice were fed 100 mg/kg body weight of root extracts (A. senticosus:A. sinensis:S. baicalensis mixed in a ratio of 5:4:1 by weight) or vehicle only on days 3–6. Inflammation was elicited on day 6 by injecting 2 mg of monosodium urate (MSU) crystals into the pouch. Neutrophil density and IL-6 and TNF-α mRNA levels were determined in the pouch membrane, and the leukocyte count and IL-6, prostaglandin E2 (PGE2) and prostaglandin D2 (PGD2) levels were determined in the pouch exudate. Treatment with the root extracts led to a reduction in all inflammatory parameters: the leukocyte count in the pouch exudate decreased by 82%; the neutrophil density in the pouch membrane decreased by 68%; IL-6 and TNF-α mRNA levels in the pouch membrane decreased by 100%; the IL-6 concentration in the pouch fluid decreased by 50%; and the PGE2 concentration in the pouch fluid decreased by 69%. Remarkably, the concentration of the potentially anti-inflammatory PGD2 rose 5.2-fold in the pouch exudate (p < 0.005), which led to a normalization of the PGD2:PGE2 ratio. A 3.7-fold rise in hematopoietic PGD synthase (h-PGDS) mRNA paralleled this rise in PGD2 (p = 0.01)

Multimodal prediction of conversion to Alzheimer's disease based on incomplete biomarkers.

BACKGROUND: This study investigates the prediction of mild cognitive impairment-to-Alzheimer's disease (MCI-to-AD) conversion based on extensive multimodal data with varying degrees of missing values. METHODS: Based on Alzheimer's Disease Neuroimaging Initiative data from MCI-patients including all available modalities, we predicted the conversion to AD within 3 years. Different ways of replacing missing data in combination with different classification algorithms are compared. The performance was evaluated on features prioritized by experts and automatically selected features. RESULTS: The conversion to AD could be predicted with a maximal accuracy of 73% using support vector machines and features chosen by experts. Among data modalities, neuropsychological, magnetic resonance imaging, and positron emission tomography data were most informative. The best single feature was the functional activities questionnaire. CONCLUSION: Extensive multimodal and incomplete data can be adequately handled by a combination of missing data substitution, feature selection, and classification

The Ursinus Weekly, January 10, 1955

12 \u27U\u27 students chosen for Who\u27s who • Lorelei, calendar tops WSGA plans • Freshman treasury empty; Treasurer calls for dues • Three Ursinus students win in Chesterfield contest • Dr. Simon Forman to speak to pre-meds • Y Commissions plan for coming events • Wanamaker retail scholarship offered • Sorority news • Freedom to learn title of FTA movie • Rev. Edward Schlingman Chi Alpha Society speaker • Work of Sidney Quinn exhibited in Library • College magazine suspension • Curtis teams lead respective leagues in I-M basketball • Social news • Larry Zartman voted All-American: Booter named to second team by national soccer coaches • Matmen win with Heydt, Dawkins, Paolone, Padula • UC topples Swarthmore 63-58; Humbles Pharmacy five 89-66 • Badminton drills begin; Opening match Feb. 10https://digitalcommons.ursinus.edu/weekly/1463/thumbnail.jp

Interferometric Tests of Teleportation

We investigate a direct test of teleportation efficacy based on a Mach-Zehnder interferometer. The analysis is performed for continuous variable teleportation of both discrete and continuous observables

Inventory for the assessment of representational competence of vector fields

Representational competence is essential for the acquisition of conceptual understanding in physics. It enables the interpretation of diagrams, graphs, and mathematical equations, and relating these to one another as well as to observations and experimental outcomes. In this study, we present the initial validation of a newly developed cross-contextual assessment of students’ competence in representing vector-field plots and field lines, the most common visualization of the concept of vector fields. The Representational Competence of Fields Inventory (RCFI) consists of ten single choice items and two items that each contain three true or false questions. The tool can be easily implemented within an online assessment. It assesses the understanding of the conventions of interpreting field lines and vector-field plots, as well as the translation between these. The intended use of the tool is both to scale students’ representational competences in respect to representations of vector fields and to reveal related misconceptions (areas of difficulty). The tool was administered at three German-speaking universities in Switzerland and Germany to a total of 515 first- and third-semester students from science, technology, engineering, and mathematics subjects. In these first steps of the validation of the RCFI, we evaluated its psychometric quality via classical test theory in combination with Rasch scaling and examined its construct validity by conducting student interviews. The RCFI exhibits a good internal consistency of ω ¼ 0.86, and the results of the Rasch analysis revealed that the items discriminate well among students from lower to medium-high competence levels. The RCFI revealed several misunderstandings and shortcomings, such as the confusion of the conventions for representing field lines and vector-field plots. Moreover, it showed that many students believed that field lines must not exhibit a curvature, that the lengths of field lines matter, and that field lines may have sharp corners. In its current version, the RCFI allows assessing students’ competence to interpret field representations, a necessary prerequisite for learning the widespread concept of vector fields. We report on planned future adaptations of the tool, such as optimizing some of the current distractors

The Ursinus Weekly, December 6, 1954

West Chester choir sings at vespers • Does Ursinus have adequate parking facilities? • Candlelight Communion to be held Dec. 9 in Bomberger • Improper procedure key in MSGA trial • Rosicrucians add members at after-dinner dessert • Dr. Dugger speaks, shows slides to pre-medical group • Christmas to visit UC in many forms • Beta Sig presents Bill Haley on Jan. 7 • Charles Hudnut wins award in national poetry contest • Seniors hold prom; Elect lord and lady • 300 attend seventeenth annual Messiah performance • Chesterfield holds contest Home for the holidays • Dr. Oliver Gogarty discusses poets • Band practicing for May Day; Marches at basketball games • Editorials • Test of time • Matmen boast 7 lettermen; Two MAC champions return • Gridmen elect Neborak MVP, 1955 captain • Heller, Bauser All Philadelphia 3rd hockey team • Susquehanna, Nat. Aggies bow; Juniata mars record by 78-56 • Westerhoff\u27s proposed revisions passed by MSGAhttps://digitalcommons.ursinus.edu/weekly/1462/thumbnail.jp