Using artificial intelligence at work – The engineers perspective

A recent survey highlighted the perspectives of electrical and computer engineers on the impact of generative AI in their field, revealing a blend of optimism and caution. Despite a general low to medium level of AI knowledge, a significant majority have already adopted AI tools like ChatGPT, Dall-E, and Midjourney, particularly younger engineers. While most report a positive impact on their work, concerns about job security remain. In their Leadership BRIEF Jose Joskowicz and Daniel Slomovitz recommend engineering leaders should foster AI adoption through tailored training, address ethical and practical concerns, and ensure open communication about AI’s role and potential job implications, thereby balancing AI’s benefits with the value of human creativity and expertise

Error evaluation of thermistor linearizing circuits

PostprintA simple designing method for linearizing circuits, based on one resistor, is presented. The errors caused by this circuit are calculated, considering the temperature range and the thermistor parameters. These errors are used as a basis for comparing the quality of active linearizing circuits. In many cases, complex circuits have similar errors to single resistor linearizing circuits. It is shown that the exponential approximation is one of the most important error sources. The authors propose to use more precise models. The relationship between the parameters of the exponential model and those of other models is discussed

A model for video quality assessment considering packet loss for broadcast digital television coded in H.264

This paper presents a model to predict video quality perceived by the broadcast digital television (DTV) viewer. We present how noise on DTV can introduce individual transport stream (TS) packet losses at the receiver. The type of these errors is different than the produced on IP networks. Different scenarios of TS packet loss are analyzed, including uniform and burst distributions. The results show that there is a high variability on the perceived quality for a given percentage of packet loss and type of error. This implies that there is practically no correlation between the type of error or the percentage of packets loss and the perceived degradation. A new metric is introduced, the weighted percentage of slice loss, which takes into account the affected slice type in each lost TS packet. We show that this metric is correlated with the video quality degradation. A novel parametric model for video quality estimation is proposed, designed, and verified based on the results of subjective tests in SD and HD. The results were compared to a standard model used in IP transmission scenarios. The proposed model improves Pearson Correlation and root mean square error between the subjective and the predicted MOS

Interference-Free Insertion of a Solid Body Into a Cavity: An Algorithm and a Medical Application

This article presents a novel algorithm for efficiently computing an interference-free insertion path of a body into a cavity and shows its practical use in the insertability analysis of custom orthopedic hip implants. The algorithm is designed to handle tightly fit, very complex three-dimensional bodies requiring fine, complex, coupled six-degree-of-freedom motions in a preferred direction. It provides a practical method for efficiently handling the geometric complexity of tight-fit insertions. The algorithm computes an insertion path consisting of small interference-free body motion steps. It formulates local, linearized configuration space constraints derived from the shapes and computes suc-cessive motion steps by solving a series of linear optimization problems whose solution corresponds to the maximum allowed displacement in a preferred direction satisfying the constraints. It either finds a successful insertion path or a stuck conftgura-tion. We demonstrate the algorithm with EXTRACT, a program for analyzing the insertability of cementless custom orthopedic hip implants. EXTRACT computes interference-free insertion paths for tightly fit implant and canal shapes described with 10,000 facets to an accuracy of 0.01 inch in 30 minutes on a workstation. It has been successfully tested on 30 real cases provided by a medical equipment manufacturer. 1

Kinematic analysis of a novel 2-d.o.f. orientation device

This paper presents the development of a new parallel robot designed for helping with bone milling surgeries. The robot is a small modular wrist with 2 active degrees of freedom, and it is proposed to be used as an orientation device located at the end of a robotic arm designed for bone milling processes. A generic kinematic geometry is proposed for this device. This first article shows the developments on the workspace optimization and the analysis of the force field required to complete a reconstruction of the inferior jawbone. The singularities of the mechanism are analyzed, and the actuator selection is justified with the torque requirements and the study of the force space. The results obtained by the simulations allow building a first prototype using linear motors. Bone milling experiment video is shown as additional material

Including the Effects of Video Content in the ITU-T G.1070 Video Quality Function

In this paper we present an enhancement to the video quality estimation model described in ITU-T Recommendation G.1070 “Opinion model for video-telephony applications”, including the effect of video content in the G.1070 video quality function. This enhancement provides a much better approximation of the model results with respect to the perceptual MOS values. SAD (Sum of Absolute Differences) is used as an estimation of the video spatial-temporal activity. The results are based on more than 1500 processed video clips, coded in MPEG-2 and H.264/AVC, in bit rate ranges from 50 kb/s to 12 Mb/s, in SD, VGA, CIF and QCIF display formats

Cableado estructurado

Se explican los conceptos y los diferentes estándares de cableado estructurado que se deben tomar en cuenta en las infraestructuras de cableado para los edificios comerciales y residenciales

Analysis of evaluating methods for transformer chopped impulse tests

Power transformers must be tested under high voltage impulse tests with full-length and chopped wave- forms. This paper compares different evaluation methods used for lighting impulse chopped tests, showing the advantages and drawbacks of them. The evaluation technique compares voltage and current wave- forms corresponding to reduced-level and full-level voltages. Any difference between the waveforms may correspond to a failure in the transformer under test. However, with chopped waveforms, impulse genera- tors may have significant differences in the time of chopping, so that low-level and full-level waveforms are different, making difficult to get a conclusion on the test result. Typical evaluating methods and a new recently proposed algorithm are compared using different power transformers and chopping times