1,675 research outputs found
A two-step MaxLik-MaxEnt strategy to infer photon distribution from on/off measurement at low quantum efficiency
A method based on Maximum-Entropy (ME) principle to infer photon distribution
from on/off measurements performed with few and low values of quantum
efficiency is addressed. The method consists of two steps: at first some
moments of the photon distribution are retrieved from on/off statistics using
Maximum-Likelihood estimation, then ME principle is applied to infer the
quantum state and, in turn, the photon distribution. Results from simulated
experiments on coherent and number states are presented.Comment: 4 figures, to appear in EPJ
PENGARUH REBRANDING DAN REPOSITIONING TERHADAP BRAND EQUITY SMARTPHONE MICROSOFT LUMIA
Rebranding merupakan proses perubahan brand, nama, dan logo dari suatu brand yang sudah ada. Salah satu tahap dari rebranding adalah repositioning untuk mengubah posisi brand tersebut di benak konsumen. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh rebranding dan repositioning terhadap brand equity smartphone Microsoft Lumia di mata penggunanya. Penelitian dilakukan dengan cara menyebarkan kuesioner kepada 175 orang responden. Responden tersebut adalah pengguna Lumia sejak era Nokia. Dari hasil penelitian tersebut kemudian diolah dan dibentuk menjadi suatu model penelitian. Selanjutnya akan dilakukan pengolahan data dengan menggunakan Structural Equation Modeling untuk membuktikan hubungan dari masing-masing variabel penelitian. Hasil penelitian ini menunjukkan bahwa rebranding tidak berpengaruh terhadap brand equity apabila brand yang dilakukan rebranding memiliki persepsi yang positif di mata konsumen. Selain itu, repositioning juga lebih memberikan pengaruh langsung terhadap brand equity
COVID-19 as a catalyst for collaborative city-making: from emergency to praxis
The crisis resulting from the spread of COVID-19 is having important consequences on the
development of the contemporary city, notably in the rethinking of public and collective spaces.
To avoid contagion, restrictive measures and social distancing have been put in place: the two
main consequences have been the digitalization of many sectors and the spread of tactical
urbanism actions. In this paper, it will be argued that hyperlocal, understood as a collective
and participatory design facilitated by information technology, can be a solution not only to the
ongoing emergency but to the challenges that contemporary society poses, since it appears to
be a valuable practice in rethinking and redesigning our neighborhoods and cities in a more
open, inclusive, and therefore more resilient wa
Informationally complete measurements and groups representation
Informationally complete measurements on a quantum system allow to estimate
the expectation value of any arbitrary operator by just averaging functions of
the experimental outcomes. We show that such kind of measurements can be
achieved through positive-operator valued measures (POVM's) related to unitary
irreducible representations of a group on the Hilbert space of the system. With
the help of frame theory we provide a constructive way to evaluate the
data-processing function for arbitrary operators.Comment: 9 pages, no figures, IOP style. Some new references adde
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