555 research outputs found
On the structure of non-full-rank perfect codes
The Krotov combining construction of perfect 1-error-correcting binary codes
from 2000 and a theorem of Heden saying that every non-full-rank perfect
1-error-correcting binary code can be constructed by this combining
construction is generalized to the -ary case. Simply, every non-full-rank
perfect code is the union of a well-defined family of -components
, where belongs to an "outer" perfect code , and these
components are at distance three from each other. Components from distinct
codes can thus freely be combined to obtain new perfect codes. The Phelps
general product construction of perfect binary code from 1984 is generalized to
obtain -components, and new lower bounds on the number of perfect
1-error-correcting -ary codes are presented.Comment: 8 page
What do teens make of personal informatics? Youth responses to self-tracking practices within a classroom setting
Personal informatics (PI) technologies allow users to collect data about aspects of their lifestyle like mood or step count.
Though teens increasingly encounter and use such technologies, little is known about how they ascribe meaning to their own
PI activities. We report a qualitative study of the PI experiences of eighteen teens (aged 14 – 17). Following a learning phase
focused on interpreting PI data, participants chose a personal goal that interested them and a PI tool to track it for 4-8 weeks
in everyday contexts. Participants proved to be competent, flexible users of PI tools, tracking a range of meaningful life factors,
from ‘worries’ to ‘exercise’; they valued learning about ‘natural patterns’ in their lives and were motivated to manage their
emotions and evaluate whether they were doing the right thing. Our findings contribute to understanding how young people
can engage in appropriation and interpretation of PI data – suggesting opportunities for educational interventions and design
Online Entertainment Trends and Its Current Development
The aim of this study is to identify the various types and trends present in the online information space, along with providing an overview of entertainment resources found on the internet. We have examined the concepts of virtual reality, online entertainment, and their classifications, along with assessing the influence of virtual worlds
Quantum Phase Shift in Chern-Simons Modified Gravity
Using a unified approach of optical-mechanical analogy in a semiclassical
formula, we evaluate the effect of Chern-Simons modified gravity on the quantum
phase shift of de Broglie waves in neutron interferometry. The phase shift
calculated here reveals, in a single equation, a combination of effects coming
from Newtonian gravity, inertial forces, Schwarzschild and Chern-Simons
modified gravity. However the last two effects, though new, turn out to be too
tiny to be observed, and hence only of academic interest at present. The
approximations, wherever used, as well as the drawbacks of the non-dynamical
approach are clearly indicated.Comment: 16 pages, minor errors corrected. Accepted for publication in Phys.
Rev.
Pharmacological correction of intrarenal hemodynamic disorders in acute kidney injury (part 2)
Evaluate the possibilities of individual pharmacological correction and intensive care of patients with acute kidney injury of different origin. A prospective nonrandomized study. Inclusion criteria: patients with prerenal, renal and subrenal AKI module in stage of oligoanuria and restoration of diuresis. Exclusion criteria: AKI in patients after cardiosurgery and operations on large vessels. Individual pharmacological and non-pharmacological correction (renoprotection) was performed in 250 ICU patients with prerenal (130), renal (81) and subrenal (39) AK
Safety and feasibility of robotic-assisted drainage of symptomatic pancreatic pseudocysts: A case-series analysis (with video)
The surgical treatment of pancreatic pseudocysts (PPs) in patients who fail nonoperative management has evolved from aggressive open to a minimally invasive approach. The application of robotic surgery in this setting is scarcely reported. The aim of this study is to analyze the safety and feasibility of the robotic approach to pancreatic pseudocyst drainage. A single centre retrospective review of consecutive patients undergoing robotic-assisted pancreatic pseudocyst surgeries in an academic tertiary institution was performed. There were 14 patients studied, of whom 10 underwent cystogastrostomy and 4 Roux-En-Y cystojejunostomy. Eight patients had gallstone pancreatitis and 3 patients alcoholic pancreatitis. The mean size of cyst was 8.9±1cm and 57.1% located at the pancreatic body. The overall operative time of the procedure was 135±34 minutes. There were no open conversions. The overall success rate was 92.8%, while the primary success rate 85.7%. The major morbidity rate was 14.3% and there was no 30-day mortality. The mean post-operative hospital stay was 7±3 days with one recurrence of the pancreatic pseudocyst on follow-up requiring endoscopic drainage without further recurrence. The robotic approach for the drainage of symptomatic pancreatic pseudocyst is safe and feasible and can be considered as a viable modality for operative intervention in well-selected patient
Programming languages and artificial general intelligence
Despite the fact that there are thousands of programming
languages existing there is a huge controversy about what language is
better to solve a particular problem. In this paper we discuss requirements
for programming language with respect to AGI research. In this article
new language will be presented. Unconventional features (e.g. probabilistic
programming and partial evaluation) are discussed as important
parts of language design and implementation. Besides, we consider possible
applications to particular problems related to AGI. Language interpreter
for Lisp-like probabilistic mixed paradigm programming language
is implemented in Haskell
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