Shortening Changeover Time - An Industrial Study

This paper presents the results of the use of the Single Minute Exchange of Die method to shorten changeover time on machines in a polish production company. This project has been developed for a manufacturing company, whose products are fiberboard, hardboard and softboard products manufactured by a highly specialized industry using only pure wood fibers. Long changeover times used to conduct to bad results in timely delivery of orders. Therefore, in this work each element of the changeover time was analyzed to understand if it could be eliminated, moved or simplified. Implemented solutions significantly reduce setup time and improve the Company's competitiveness.This work is supported by Portuguese National Funds through FCT “Fundação para a Ciência e a Tecnologia” under the projects: “Projeto Estratégico–UI 252–2011–2012”, reference PEst-OE/EME/UI0252/2014, and FCOMP-01-0124FEDER-PEst-OE/EEI/UI0760/2014.info:eu-repo/semantics/publishedVersio

Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV

Searches for supersymmetry (SUSY) are presented based on the electroweak pair production of neutralinos and charginos, leading to decay channels with Higgs, $Z$, and $W$ bosons and undetected lightest SUSY particles (LSPs). The data sample corresponds to an integrated luminosity of about $19.5\text{}\text{}{\mathrm{fb}}^{-1}$ of proton-proton collisions at a center-of-mass energy of 8 TeV collected in 2012 with the CMS detector at the LHC. The main emphasis is neutralino pair production in which each neutralino decays either to a Higgs boson ($h$) and an LSP or to a $Z$ boson and an LSP, leading to $hh$, $hZ$, and $ZZ$ states with missing transverse energy (${E}_{\mathrm{T}}^{\text{miss}}$). A second aspect is chargino-neutralino pair production, leading to $hW$ states with ${E}_{\mathrm{T}}^{\text{miss}}$. The decays of a Higgs boson to a bottom-quark pair, to a photon pair, and to final states with leptons are considered in conjunction with hadronic and leptonic decay modes of the $Z$ and $W$ bosons. No evidence is found for supersymmetric particles, and 95% confidence level upper limits are evaluated for the respective pair production cross sections and for neutralino and chargino mass values