5,591 research outputs found
Design tradeoffs for a Multispectral Linear Array (MLA) instrument
The heart of the multispectral linear array (MLA) design problem is to develop an instrument concept which concurrently provides a wide field-of-view with high resolution, spectral separation with precise band-to band registration, and excellent radiometric accuracy. Often, these requirements have conflicting design implications which can only be resolved by careful tradeoffs that consider performance, cost, fabrication feasibility and development risk. The key design tradeoffs for an MLA instrument are addressed, and elements of a baseline instrument concept are presented
The Inductive Single-Electron Transistor (L-SET)
We demonstrate a sensitive method of charge detection based on
radio-frequency readout of the Josephson inductance of a superconducting
single-electron transistor. Charge sensitivity ,
limited by preamplifier, is achieved in an operation mode which takes advantage
of the nonlinearity of the Josephson potential. Owing to reactive readout, our
setup has more than two orders of magnitude lower dissipation than the existing
method of radio-frequency electrometry. With an optimized sample, we expect
uncoupled energy sensitivity below in the same experimental scheme.Comment: 10 page
Quantum capacitive phase detector
We discuss how a single Cooper-pair transistor may be used to detect the
superconducting phase difference by using the phase dependence of the input
capacitance from gate to the ground. The proposed device has a low power
dissipation because its operation is in principle free from quasiparticle
generation. According to the sensitivity estimates the device may be used for
efficient qubit readout in a galvanically isolated and symmetrized circuit.Comment: 5 pages, published for
Charge sensitivity of the Inductive Single-Electron Transistor
We calculate the charge sensitivity of a recently demonstrated device where
the Josephson inductance of a single Cooper-pair transistor is measured. We
find that the intrinsic limit to detector performance is set by oscillator
quantum noise. Sensitivity better than e is
possible with a high -value , or using a SQUID amplifier. The
model is compared to experiment, where charge sensitivity e and bandwidth 100 MHz are achieved.Comment: 3 page
STRATEGY AS PRACTICE: SEEING THE PRACTICE OF MATERIAL DEPLOYMENT THROUGH AFFORDANCE LENSES
The objective of this research was to investigate sociomaterial aspects of affordances regarding the practices in the strategy work. The materials have been studied on and off for a while and traditionally this research has had its roots in resource-based views. The strategy-as-practice stream has benefited the management research by giving importance on what strategists and practitioners do in practice. The findings of the empirical research showed evidence for abundant contemporary methods in the application of the technologies and programs before and after the meeting.
The paper managed to include two distinctive datasets for the analysis. The meeting practices showed how the contemporarily strategic meetings are conducted both virtually and face-to-face. The data analysis finds evidence that the practitioners are tolerant to the certain program and material related inefficiencies and side-effects although their task as a strategist and practitioner relate to finding the solution to these issues. The industrial design directors (the Cluster 1) discussed how they convert intangibles to tangible outcomes through creativity, use of methods and tools, and especially communicate with visual means. The middle-management informants (the Cluster 2) were involved to follow the strategic agenda, the policies related to the use of selected technologies and take action related to a distinctive set of social practices in a global company. The findings show how one large organization utilize telecommunication as an important enabler in the praxis. As a managerial implication, the paper proposes discussions on the key technological instruments in the praxis to better justify current routines: the constraints limit the efficient practice. The phenomena of postponing the chance could be explained by dwelling until the strategy emerges
Book Review: Data Feminism
Book review of: Data Feminism by Catherine D\u27Ignazio and Lauren F. Klein, The MIT Press (2020). Data Feminism combines intersectional feminism and critical data studies to invite the reader to consider: “How can we use data to remake the world?” As non-profit organizations with a mandate to provide equitable access to non-neutral information and services, libraries and library workers are uniquely positioned to advance the principles laid out in Data Feminism
Alternating, private alternating, and quantum alternating realtime automata
We present new results on realtime alternating, private alternating, and
quantum alternating automaton models. Firstly, we show that the emptiness
problem for alternating one-counter automata on unary alphabets is undecidable.
Then, we present two equivalent definitions of realtime private alternating
finite automata (PAFAs). We show that the emptiness problem is undecidable for
PAFAs. Furthermore, PAFAs can recognize some nonregular unary languages,
including the unary squares language, which seems to be difficult even for some
classical counter automata with two-way input. Regarding quantum finite
automata (QFAs), we show that the emptiness problem is undecidable both for
universal QFAs on general alphabets, and for alternating QFAs with two
alternations on unary alphabets. On the other hand, the same problem is
decidable for nondeterministic QFAs on general alphabets. We also show that the
unary squares language is recognized by alternating QFAs with two alternations
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