Search results for " errors"

Modeling and Mitigating Errors in Belief Propagation for Distributed Detection

2021

We study the behavior of the belief-propagation (BP) algorithm affected by erroneous data exchange in a wireless sensor network (WSN). The WSN conducts a distributed multidimensional hypothesis test over binary random variables. The joint statistical behavior of the sensor observations is modeled by a Markov random field whose parameters are used to build the BP messages exchanged between the sensing nodes. Through linearization of the BP message-update rule, we analyze the behavior of the resulting erroneous decision variables and derive closed-form relationships that describe the impact of stochastic errors on the performance of the BP algorithm. We then develop a decentralized distribute…

Current transformers effects on the measurement of harmonic active power in LV and MV networks

2011

The harmonic active power is used to determine the location of polluting loads, the direction of harmonic power flow and to estimate how consequential a certain current harmonic source is. The highest uncertainties, when measuring harmonic active power, are introduced by the current and voltage transducers. This paper presents experimental results which show the impact of current transformers (CTs) on the accuracy of the harmonic power measurements. An expression for the evaluation of the power error in distorted conditions was developed which can be easily utilized in the case of linear current transducers. It is shown how CTs cannot be considered linear transducers and how the higher the …

Blood Transfusion Management for Patients Treated With Anti-CD38 Monoclonal Antibodies

2018

Daratumumab has proven to be highly efficacious for relapsed and refractory multiple myeloma (MM) and has recently been approved in the frontline setting for MM patients ineligible for transplantation. In the future, expanded indications are possible for daratumumab and other anti-CD38 monoclonal antibodies in development. For several years, it has been recognized that these therapies interfere with blood bank testing by binding to CD38 on red blood cells and causing panagglutination on the Indirect Antiglobulin Test. This can lead to redundant testing and significant delays in patient care. Given the anticipated increase in utilization of anti-CD38 monoclonal antibodies, as well as the tra…

Monitoring the quality of the hospital pharmacoterapeutic process by sentinel patient program

2018

To analyze the results of sentinel patient program to monitoring the  quality pharmacoterapeutic process in the hospitalized patient through  medication errors.Design: Observational, prospective and transversal study. Ambit: General hospital of 1,000 beds.From May 2011 to June 2016.  Sample: Patients with treatment prescribe within 24 hours of being admitted  with 4 or more medications.Medication error, drugs prescribed,  medications and doses dispensing, drugs administered. Safety indicators were  defined based on medication errors at each stage of the pharmacotherapeutic  process.Of the 746 patients studied, 334 had at least 1 medication error  (44.8%; IC95%: 41.7-47.8). In the 746 treatm…

Surgical learning and guidance on operative risks and potential errors

2017

Purpose Within the framework of learning from errors, this study focused on how operative risks and potential errors are addressed in guidance to surgical residents during authentic surgical operations. The purpose of this paper is to improve patient safety and to diminish medical complications resulting from possible operating errors. Further in the process of the optimal contexts for instruction aimed at preventing risks and errors in the practical hospital environment was evaluated. Design/methodology/approach The five authentic surgical operations were analyzed, all of which were organized as training sessions for surgical residents. The data (collected via video-recoding) were analyze…

Estimation of linear errors-in-variable models with error free covariates: a backfitting approach

2008

We present a backfitting algorithm to estimate linear regression mod- els having both error-prone and error-free covariates as predictors. The algorithm assumes that the variance-ratios are known, and it is particulary efficient when several explanatory variables are included. The resulting estimators are shown to be unbiased and to perform well as compared to method-of-moments estimators which are usually employed when the variance ratio is known.

Effectiveness of tDCS at Improving Recognition and Reducing False Memories in Older Adults

2021

Background: False memories tend to increase in healthy and pathological aging, and their reduction could be useful in improving cognitive functioning. The objective of this study was to use an active–placebo method to verify whether the application of transcranial direct current stimulation (tDCS) improved true recognition and reduced false memories in healthy older people. Method: Participants were 29 healthy older adults (65–78 years old) that were assigned to either an active or a placebo group

Trichostasis spinulosa misdiagnosed as alopecia areata.

2020

Heredity of interocular similarities in components of refraction: a population-based twin study among 66- to 79-year-old female twins.

2019

Purpose: To examine genetic influences on interocular similarities in ocular refraction and components of refraction among elderly female twins. Methods: Refraction was assessed in 94 monozygotic (MZ) and 74 dizygotic (DZ) female twins aged 66–78 years. Absolute values of interocular differences (Aniso variables) in spherical refraction (SR), refractive astigmatism (AST), spherical equivalent (SE), corneal refractive power (CR), corneal astigmatism (CAST), anterior chamber depth (ACD) and axial length (AL) were calculated. The differences between sisters in each of the Aniso variables were calculated and graded into two categories, best differentiating the groups, here isometropic and aniso…

A case of combined Farber and Sandhoff disease

1989

We describe a patient with the biochemically established combination of Farber and Sandhoff disease. A 6-month-old girl of consanguineous Turkish parents presented with hoarseness, stridor, scattered skin nodules, painful swelling of hand joints and ankles, and cherry-red macular spots. Until the age of 2 years her motor and physical condition deteriorated distinctly, however her mental state remained unchanged. A biopsied skin nodule disclosed lysosomal inclusions within storage cells that were typical of Farber disease (curved tubular structures). However, other inclusions (e.g. zebra bodies) were also found. Biochemical findings included ceramide accumulation in skin nodules and cultured…