Indoor Massive MIMO Deployments for Uniformly High Wireless Capacity

Providing consistently high wireless capacity is becoming increasingly important to support the applications required by future digital enterprises. In this paper, we propose Eigen-direction-aware ZF (EDA-ZF) with partial coordination among base stations (BSs) and distributed interference suppression as a practical approach to achieve this objective. We compare our solution with Zero Forcing (ZF), entailing neither BS coordination or inter-cell interference mitigation, and Network MIMO (NeMIMO), where full BS coordination enables centralized inter-cell interference management. We also evaluate the performance of said schemes for three sub-6 GHz deployments with varying BS densities -- sparse, intermediate, and dense -- all with fixed total number of antennas and radiated power. Extensive simulations show that: (i) indoor massive MIMO implementing the proposed EDA-ZF provides uniformly good rates for all users; (ii) indoor network densification is detrimental unless full coordination is implemented; (iii) deploying NeMIMO pays off under strong outdoor interference, especially for cell-edge users

Accidentes laborales graves y mortales y su relación con los factores de riesgo psicosocial intralaborales en empresas afiliadas a una ARL de Cali en los años 2015 al 2018

La accidentalidad en el trabajo es un fenómeno que afecta los estados de todos los países, pues su impacto en la economía y en el bienestar social es innegable. según un informe del 2018 presentado por la Organización Internacional del Trabajo (OIT) cada año se presentan más de 317 millones de accidentes asociados al trabajo,(1) cada 15 segundos se accidentan 153 trabajadores y uno es mortal. la mortalidad laboral anual es calculada superando los 2,3 millones, lo que sin duda genera preocupación el número de accidentes laborales para el año 2017 fue de 655.866 en Colombia de los cuales 562 accidentes fueron calificados como mortales(2). En el mismo año, para el Valle del Cauca el número de accidentes laborales fue de 75.746 de los cuales 74 fueron mortales. Naturalmente, estas cifras están circunscritas a la población nacional afiliada al Sistema General de Seguridad Social en Salud (SGSSS), así que la cifra seguramente es mayor si se tienen en cuenta a los trabajadores que no se encuentran afiliados al sistema. Los sectores económicos que más accidentes aportan al país según cifras de 2017 presentadas por Fasecolda (3) son: (1): Sector inmobiliario con 147.358 accidentes 20 (2):. Sector manufactura con 89.311 accidentes 21 (3): Sector construcción con 87.459 accidentes 22 (4):Sector comercio con 66.315 accidentes 23. Estas cifras indican que la accidentalidad laboral, está lejos de ser controlada, al 24 menos en lo que respecta a Colombia, y que los esfuerzo emplazados para su 25 control deben continuar como política de estado y en constante vigilancia por el 26 Ministerio del Trabajo.MaestríaMAGISTER EN SALUD OCUPACIONA

Uplink Sounding Reference Signal Coordination to Combat Pilot Contamination in 5G Massive MIMO

To guarantee the success of massive multiple-input multiple-output (MIMO), one of the main challenges to solve is the efficient management of pilot contamination. Allocation of fully orthogonal pilot sequences across the network would provide a solution to the problem, but the associated overhead would make this approach infeasible in practical systems. Ongoing fifth-generation (5G) standardisation activities are debating the amount of resources to be dedicated to the transmission of pilot sequences, focussing on uplink sounding reference signals (UL SRSs) design. In this paper, we extensively evaluate the performance of various UL SRS allocation strategies in practical deployments, shedding light on their strengths and weaknesses. Furthermore, we introduce a novel UL SRS fractional reuse (FR) scheme, denoted neighbour-aware FR (FR-NA). The proposed FR-NA generalizes the fixed reuse paradigm, and entails a tradeoff between i) aggressively sharing some UL SRS resources, and ii) protecting other UL SRS resources with the aim of relieving neighbouring BSs from pilot contamination. Said features result in a cell throughput improvement over both fixed reuse and state-of-the-art FR based on a cell-centric perspective

A Comprehensive Study on Pain Assessment from Multimodal Sensor Data

Pain assessment is a critical aspect of healthcare, influencing timely interventions and patient well-being. Traditional pain evaluation methods often rely on subjective patient reports, leading to inaccuracies and disparities in treatment, especially for patients who present difficulties to communicate due to cognitive impairments. Our contributions are three-fold. Firstly, we analyze the correlations of the data extracted from biomedical sensors. Then, we use state-of-the-art computer vision techniques to analyze videos focusing on the facial expressions of the patients, both per-frame and using the temporal context. We compare them and provide a baseline for pain assessment methods using two popular benchmarks: UNBC-McMaster Shoulder Pain Expression Archive Database and BioVid Heat Pain Database. We achieved an accuracy of over 96% and over 94% for the F1 Score, recall and precision metrics in pain estimation using single frames with the UNBC-McMaster dataset, employing state-of-the-art computer vision techniques such as Transformer-based architectures for vision tasks. In addition, from the conclusions drawn from the study, future lines of work in this area are discussed

How to enhance labor provisions in IIAs

Labor provisions in IIAs should focus on corporate activity rather than governmental action. In order to encourage corporations to embrace the highest available international standards, labor provisions in IIAs should make reference to multilateral instruments that entail market-based incentives to promote labor rights on a CSR basis

Autonomous error correction of a single logical qubit using two transmons

Large-scale quantum computers will inevitably need quantum error correction to protect information against decoherence. Traditional error correction typically requires many qubits, along with high-efficiency error syndrome measurement and real-time feedback. Autonomous quantum error correction (AQEC) instead uses steady-state bath engineering to perform the correction in a hardware-efficient manner. We realize an AQEC scheme, implemented with only two transmon qubits in a 2D scalable architecture, that actively corrects single-photon loss and passively suppresses low-frequency dephasing using six microwave drives. Compared to uncorrected encoding, factors of 2.0, 5.1, and 1.4 improvements are experimentally witnessed for the logical zero, one, and superposition states. Our results show the potential of implementing hardware-efficient AQEC to enhance the reliability of a transmon-based quantum information processor