33,751 research outputs found
Randomized control of open quantum systems
The problem of open-loop dynamical control of generic open quantum systems is
addressed. In particular, I focus on the task of effectively switching off
environmental couplings responsible for unwanted decoherence and dissipation
effects. After revisiting the standard framework for dynamical decoupling via
deterministic controls, I describe a different approach whereby the controller
intentionally acquires a random component. An explicit error bound on
worst-case performance of stochastic decoupling is presented.Comment: 6 pages, no figure, requires IEEEtran LaTe
Herds and Coherds
The first aim of this thesis is to give a unified and self-contained treatment of a number of known results related to the theory of herds. This gives us the technical tools to deal with the second aim of our work which is to obtain some new results about herds and coherds in the pure categorical setting. A herd at this level is a pretorsor τ : Q → QPQ satisfying associativity and unitality properties with respect to a formal dual structure M = (A, B, P,Q, σᴬ, σᴮ) ...
Resolvent estimates for non-selfadjoint operators with double characteristics
We study resolvent estimates for non-selfadjoint semiclassical
pseudodifferential operators with double characteristics. Assuming that the
quadratic approximation along the double characteristics is elliptic, we obtain
polynomial upper bounds on the resolvent in a suitable region inside the
pseudospectrum.Comment: 38 pages. J. London Math. Soc., to appear. Published version may
diffe
Challenges in computational lower bounds
We draw two incomplete, biased maps of challenges in computational complexity
lower bounds
AN ANALYSIS OF THE DIFFICULTIES IN PRONUNCIATION OF -RL -RN -RD ENDING WORDS FACED BY GRADES 5 AND 6 STUDENTS OF SDN WONOREJO 2
Pronunciation is essential for delivering a speech to avoid miscommunication. The study attempts to achieve the objective stated in the issue statement is to describe the way how the students of grades five and six of SDN WONOREJO 2 pronounce the words that consist of -rl, -rn, -rd endings. This study aims to describe the student's difficulties in pronouncing the -rn. -rl, -rd ending and observed the students of grades 5 and 6 at SDN WONOREJO 2 based on the pronunciation through the consonant. This thesis's research subject is the grades five and six students in WONOREJO 2 Elementary School. Grade five has nine students, while grade six has nine students. This study employs mixed methods which are descriptive quantitative and descriptive qualitative research methodologies to analyze data obtained from respondents' observations and interviews. Based on the findings and discussion in the previous chapter out of eighteen students three students are considered as D in the percentage with the ranges of 40%-54,9% with 46%-58%. Five teen students are considered as E in the percentage with the ranges of <40% with 4%-37% and 100% of the eighteen students have difficulties pronouncing the word burn /bɜːn/. The researcher concludes that most of the students in grades five and six at SDN WONOREJO 2 have difficulties in pronunciation especially in twenty-four -rn, -rl, -rd ending words as follows, learn, earn, corn, saturn, burn, return, modern, western, born, turn, girl, earl, pearl, curl, blackboard, cupboard, record, forward, third, word, hard, bird, heard and reward. The researcher found that the difficulties the students have in grades 5 and 6 at SDN WONOREJO 2 are usually influenced by the mother tongue, age, and classroom environments
Comment on Breakup Densities of Hot Nuclei
In [1,2]the observed decrease in spectral peak energies of IMFs emitted from
hot nuclei was interpreted in terms of a breakup density that decreased with
increasing energy. Subsequently, Raduta et al. [3] performed MMM simulations
that showed decreasing spectral peaks could be obtained at constant density. In
this letter we examine this apparent inconsistency.Comment: 9 pages, 2 figures, 1 tabl
Social interaction of patients and personnel in a ward situation
Thesis (M.S.)--Boston Universit
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