Decentralised Electricity Storage Possibilities - From a Geographical Viewpoint

The development of energy systems has a quite conspicuous direction which can be described as renewable energy based decentralisation. This way of the energy evolution demands an extensive presence of storage applications, in regional and local level, as well. The battery storage is the simplest solution but the financial part of these applications (pumped hydro-, power-to-gas-, liquid air-, and compressed air energy storage) can be demanding. This is why this research is focused on some alternative technologies and their spatial dimension. This latter is considered as limitation in some of the researches. In our approach the spatial aspect is considered as possibility for the less-developed rural regions, as the research area of this paper, the operation area of the “Bükk LEADER rural development region” in North-East Hungary. According to the GIS analysis, all the four storage technologies seem to be applicable: 78-160 pumped storages; 29 power-to-gas storages; 7 liquid air storages and significant number of small-scale compressed air energy storage would be applicable in the research area. However, it is important to underline, that the above mentioned values are not comparable from the quantity of the stored energy point of view, because it is mostly affected by the technology

A decentralizált energiatárolás lehetőségeinek vizsgálata egy magyarországi mintaterületen

Az energiagazdálkodásban zajló forradalmi változások kapcsán az elmúlt években előtérbe kerülő energiatárolás kikerülhetetlen kutatási feladatként jelentkezik szerte Európában - és hazánkban is. Jelen munka a tárolás decentralizált lehetőségeit igyekezett feltárni egy Borsod megyei mintaterület vizsgálatával. A három technológia a “szivattyús tárolás”, a “folyékony levegős energiatárolás”, valamint a “áramból gázt” megoldás (Power-to-Gas - sajnos ennek igazán jó magyar fordítása még nem gyökeresedett meg, de a nemzetközi szakirodalomban P2G rövidített néven terjedt el, így a továbbiakban ezt használjuk). A kutatás jelen állásában világosan látszik, hogy a térség potenciálja nem elhanyagolható, kisebb-nagyobb létesítmények megvalósítására szinte mindenhol van lehetőség, hiszen a 42 településre vetítve összesen 44 potenciális helyszínt sikerült beazonosítani. Ennek kapcsán világosan kirajzolódik az energiagazdálkodásban zajló radikális irányváltás tájra és településképre gyakorolt hatása: az országban jelenleg tízes nagyságrendben működő nagy teljesítményű energiatermelő létesítmény helyett a jövőben százezres nagyságrendben kell számolni kisebb-nagyobb, de főként egészen kicsi, főként háztartási és közösségi léptékű berendezésekkel

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

Peer reviewe

Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

Peer reviewe

An embedding technique to determine ττ backgrounds in proton-proton collision data

An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe

Measurement of the Splitting Function in &ITpp &ITand Pb-Pb Collisions at root&ITsNN&IT=5.02 TeV

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.Peer reviewe