Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering

Permanent URI for this collectionhttps://gcris3.etu.edu.tr/handle/20.500.11851/279

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1919 ve 1990 Yılları Arasında "kürdistan"ın Ortadoğu'da Sınırsallaş(ama)ması: Eleştirel Jeopolitik Bir Yaklaşım
(TOBB University of Economics and Technology, Graduate School of Economics and Social Sciences, 2016) Akyol, Naz Duygu; Palabıyık, Mustafa Serdar
This thesis analyses the reasons of why a certain "Kurdistan" could not be established as a geopolitical entity within the Middle East between the years 1919 and 1990. By using critical geopolitics as the theoretical framework, the thesis focuses on the effects of continuous deterritorialization and reterritorialization of the Kurdistan as a geopolitical entity as well as civilizational and ideological geopolitical discourses developed by four states in the region, being Turkey, Iran, Iraq and Syria. A threefold argument is proposed to explain why an independent or an autonomous Kurdistan could not be formed at the chosen time frame. The internal factors underline the traditional tribal and more recent territorial divisions among the Kurdish tribes preventing the Kurds to establish a common geopolitical discourse describing a particular and territorially-defined "Kurdistan". The external factors emphasize the policies and geopolitical discourses developed by states to preserve their territorial integrity and to prevent any separatist tendency within their own states. Finally, the third set of factors cross-linked internal and external factors. It focuses on the cooperative and conflictual transversal connections between sovereign states and Kurdish political movements. Accordingly, some sovereign states tended to cooperate with the Kurdish groups of rival states in a way to undermine the power of the Kurdish groups within itself and some Kurdish political movements tended to cooperate with the neighboring state to undermine the power of the home state. All in all, the period between 1919 and 1990 witnessed the failure of the projects to establish an autonomous if not an independent Kurdistan.
Citation - Scopus: 1
Acil Yardım Akıllı Turnike Sistemi [conference Object]
(IEEE, 2017) Beytar, Faruk; Budak, Erdem İnanç; Ünlü, Aytekin; Eroğul, Osman
In case of traffic accidents, firearm injuries and explosions, it is necessary to apply a tourniquet in order to survive the injuries of serious extremity injuries and blood loss. There are a few things to consider when applying a tourniquet. If the tourniquet is not tightened enough to stop the blood loss, blood loss continues and the injured person's life becomes dangerous. If excessive pressure is exerted, and if it is not relaxed and squeezed intermittently, it may cause gangrene in the extremity. The purpose of this study is to develop a pneumatic, intelligent tourniquet system that can successfully stop bleeding by automatically applying the necessary pressure to the proximal limb, where it is injured to stop excessive blood loss in extremity injuries. It is thought that the developed system will be widely used in ambulances, first aid kits for vehicles, emergency services for hospitals, first aid organizations, fire trucks, first aid kits for risky workplaces and many similar civilian areas. As the output of this study; an intelligent tourniquet system prototype has been produced that can be used for arm and leg, inflates with an air motor, has an advanced microcontroller that can manage many parameters, has a GPS module that can access the location of the injured person, has a RTC (Real Time Clock) that can calculate elapsed time since the start of the tourniquet, has a pressure sensor that can gage the tourniquet pressure, can display these information on the OLED screen, direct the user with the necessary instructions to apply the tourniquet correctly, and also send messages to the mobile phone via the GSM module on the collected data.
Acil Yardım Akıllı Turnike Sistemi [master Thesis]
(TOBB University of Economics and Technology,Graduate School of Engineering and Science, 2017) Beytar, Faruk; Eroğul, Osman
Traffic accidents, firearm injuries and explosions can result in severe extremity injuries and hemorrhage while bleeding extremity can stop bleeding with a tourniquet if one hand remains intact until the healthcare personnel intervenes. There are a few things to consider when applying a tourniquet. If the tourniquet is not tightened enough to stop the blood loss, blood loss continues and the injured person's life becomes dangerous. If excessive pressure is exerted, and if it is not relaxed and squeezed intermittently, it may cause gangrene in the extremity. It is also very difficult to manually apply the tourniquet with optimum pressure, especially on the leg, when bleeding. The aim of the thesis study is to develop a pneumatic, intelligent tourniquet system that can be used to stop excessive blood loss in extremity injuries by connecting to the proximal limb and applying the necessary pressure automatically to stop the bleeding successfully. It is thought that the developed system will be widely used in ambulances, first aid kits in vehicles, emergency services in hospitals, first aid institutions, fire trucks, first aid kits for risky workplaces under occupational health and safety and many similar civilian areas. As the output of the thesis study; an intelligent tourniquet system prototype has been produced that can be used for arm and leg, inflates with an air motor, has an advanced microcontroller that can manage many parameters, has a GPS (Global Positioning System) module that can access the location of the injured person, has a RTC (Real Time Clock) that can calculate elapsed time since the start of the tourniquet, has a pressure sensor that can gauge the tourniquet pressure, can display these information on the OLED (Organic Light Emitting Diode) screen, direct the user with the necessary instructions to apply the tourniquet correctly, and also send messages to the mobile phone via the GSM (Global System for Mobile Communications) module on the collected data.
Citation - WoS: 107
Citation - Scopus: 168
Angular Analysis of Bd0 › K * Μ + Μ - Decays in Pp Collisions at ?s=8 Tev With the Atlas Detector
(Springer Verlag, 2018-10) The ATLAS Collaboration; Sultansoy, Saleh
An angular analysis of the decay Bd0 → K∗μ+μ− is presented, based on proton-proton collision data recorded by the ATLAS experiment at the LHC. The study is using 20.3 fb−1 of integrated luminosity collected during 2012 at centre-of-mass energy of s=8 TeV. Measurements of the K* longitudinal polarisation fraction and a set of angular parameters obtained for this decay are presented. The results are compatible with the Standard Model predictions.[Figure not available: see fulltext.]. © 2018, The Author(s).
Asymptomatic Hemochromatosis Case With Hfe C.1007−47g>a, C.340+4t>c Heterozygous Mutations and Alpha Globin −3.7 Kb Deletion
(2019) Çelik, Vesile Deniz; Kılıç, Betül Orhan; Ardıçoğlu Akışın, Nazife Yasemin; Akar, Nejat
Background Hereditary hemochromatosis is a disease associated with iron deposition which is caused by the mutations in “hereditary Fe (iron)” (HFE) gene. Case The 16-year-old male patient was diagnosed with hereditary hemochromatosis after c.1007?47G>A heterozygous c.340+4?T>C heterozygous mutations were detected in HFE gene analysis after a suspicion of hemochromatosis due to increase of hemoglobin value from 14.8?g/dL to 16.8?g/dL and the level of ferritin from 68?ng/ml to 300?ng/ml in routine check-up controls in two-years period. In addition, due to low mean corpuscular volume (MCV) (76?fL), and mean corpuscular hemoglobin (MCH) (26?pg) levels, gene mutation analysis was carried out and the patient was also shown to carry ? thalassemia ?3.7 deletions. Conclusion Early diagnosis of hemochromatosis is important in terms of prognosis and morbidity. We aimed to emphasize that we can easily diagnose the disease by performing genetic analysis in cases with suspected hemochromatosis even they have no complaints.
Citation - WoS: 268
Citation - Scopus: 312
Atlas B-Jet Identification Performance and Efficiency Measurement With Tt¯ Events in Pp Collisions at ?s=13 Tev
(Springer, 2019-11) The ATLAS Collaboration; Sultansoy, Saleh
The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency with which these algorithms identify jets containing b-hadrons is measured in collision data. The measurement uses a likelihood-based method in a sample highly enriched in tt¯ events. The topology of the t→ Wb decays is exploited to simultaneously measure both the jet flavour composition of the sample and the efficiency in a transverse momentum range from 20 to 600 GeV. The efficiency measurement is subsequently compared with that predicted by the simulation. The data used in this measurement, corresponding to a total integrated luminosity of 80.5 fb - 1, were collected in proton–proton collisions during the years 2015–2017 at a centre-of-mass energy s= 13 TeV. By simultaneously extracting both the efficiency and jet flavour composition, this measurement significantly improves the precision compared to previous results, with uncertainties ranging from 1 to 8% depending on the jet transverse momentum. © 2019, CERN for the benefit of the ATLAS collaboration.
Citation - WoS: 21
Citation - Scopus: 25
Azo/Metal Transparent Conductive Oxide Thin Films for Spray Pyrolyzed Copper Indium Sulfide Based Solar Cells
(Elsevier, 2018-05-01) Aydın, Erkan; Demirci Sankır, Nurdan
In this study, effects of the aluminum doped zinc oxide (AZO) and metal sandwich structures on the photovoltaic performance of spray pyrolyzed copper indium sulfide (CuInS2) based solar cells have been investigated. Electrical resistivity of the AZO films, 58.5 Omega.cm, has been lowered up to 3.2 x 10(-5) Omega.cm via metal interlayer deposition. All sandwich-structured transparent conductive oxide (TCO) layers have been deposited at room temperature and very low radio frequency power. This not only reduced the manufacturing cost but also eliminated the penetration of undesired elements from TCO layer through the absorber. The maximum figure of merit of AZO/molybdenum/AZO, AZO/copper/AZO and AZO/silver/AZO structures were 2.98 x 10(-6), 1.06 x 10(-3) and 3.91 x 10(-2), respectively. This indicated that maximum optical transmittance with minimum sheet resistance has been obtained for the silver interlayer. Then molybdenum/CuInS2/indium sulfide/zinc oxide/AZO-metal-AZO/nickel/aluminum device structure has been manufactured to investigate the photovoltaic parameters. Although all devices had similar open cell voltage, the short circuit current density (J(sc)) of the devices has been improved more than 17 times with metal incorporation. The highest J(sc) of 10.15 mA/cm(2) has been observed for the solar cell having AZO/silver/AZO layer. Alternating current measurements revealed that silver interlayer produced the highest electron transit- and life-time, which resulted the higher Jsc compare to the other metal interlayers. Finally, we improved the photovoltaic parameters of the thin film solar cells with AZO/silver/AZO layer via tailoring the stoichiometry of the CuInS2 absorber layer. The maximum conversion efficiency of 4.19% has been observed for sulfur/(copper + indium) and sulfur/copper ratios of 0.79 and 1.26, respectively. This value is very promising to utilize the AZO/metal/AZO films as TCO layer in low cost and fully ecofriendly thin film solar cells.
BINDING MECHANISM OF CALCIUM AND SODIUM ION OF CavAb CHANNEL
(2015) Baştuğ, Turgut; Çavuş, Murat; Kuyucak, Serdar
Voltaj-kapılı kalsiyum kanalları, nöronlara kalsiyum girişinin birincil düzenleyicileridir [1]. Kalsiyum kanalları beyin fonksiyonları için hayati öneme sahipken onların hasarı veya bozuklukları; acı, epilepsi, migren, ataksi gibi birçok nörolojik hastalığa neden olur. Moleküler dinamik metotlar iyon kanallarının yapı-fonksiyon ilişkilerini çalışmak için tek fiziksel olarak geçerli tekniktir. Seçici biyolojik kanalların geçiş mekanizmasının çok iyonlu doğasını gösteren sodyum ve kalsiyum kanalları bu yöntemlerin uygulamaları olarak sunulmuştur (Şekil 1'de gösterildi). Bu çalışmada, Ca++ kanalı için tek ve çok iyonlu Na bağlama enerjileri sunuldu. Ayrıca bu + kanalın yapı-fonksiyon ilişkisi oluşturmak için bağlanma enerjileri yorumlandı
Bir Bakışta Tıbbi Mikrobiyoloji ve Enfeksiyon
(Akademisyen Kitabevi, 2019-09) Gillespie, Stephen; Bamford, Kathleen; Göçmen, Jülide Sedef; İnan, Neşe
Citation - WoS: 2
Citation - Scopus: 3
Broadband Direction-Dependent Transmission of Light With Photonic Crystal Heterostructure Grating
(IOP Publishing Ltd., 2018-01-17) Yılmaz, Döne; Giden, İbrahim Halil; Kurt, Hamza
Direction-dependent light transmission is a remarkable phenomenon owing to its great potential to be used in optical communication processing systems such as optical diodes, isolators and rectifiers. All these applications require optical reciprocity breaking mechanisms such as magneto-optical effect. Keeping the reciprocity intact, it is possible to manipulate the amount and spatial form of the two oppositely propagating lights exiting from a passive photonic medium. In this paper, a photonic crystal diffraction grating (PCDG) configuration is studied for the investigation of asymmetric light transport due to the spatial inversion symmetry breaking in the designed compact all-dielectric PC heterostructure. Thanks to the periodic corrugations at the back-surface of the designed structure, the backward transmission of the zero-order diffracted wave is notably suppressed while the efficient unidirectional forward transmission is achieved. Numerical calculations show that up to 73% of the incoming electromagnetic energy is transmitted in the forward illumination whereas it reduces down to a value of 6% (which corresponds to 10.85 dB beam suppression) in the case of backward illumination. That asymmetric light transmission leads to a contrast ratio (CR) of above 0.55 (CR = (T +x - T -x)/(T +x + T -x), in which T -x and T +x are the transmission efficiencies in the -x and +x directions, respectively). The highest contrast ratio of CR = 0.99 is calculated at the incident frequency of a/λ = 0.5338 having the forward and backward transmissions of {T +x,T -x} = {42%,0.1%}, which corresponds to the beam suppression of 26.23 dB. Furthermore, the proposed PCDG exhibits the diffraction grating effect at the considerable range of angle of incidence up to ±20° at certain frequencies indicating that the proposed grating system is durable to source misalignments.
Bulanık Regresyon Modellerinin Tutarlılığı Üzerine Çalışmalar
(TOBB Ekonomi ve Teknoloji Üniversitesi Fen Bilimleri Enstitüsü, 2014) Özşahin, Selcen Gülsüm Aslan; Türkşen, İsmail
In today's World, collecting data is not a big issue in a proper and processable format with the help of recent technological developments but it is a big deal not only for the government bodies, private sector and also for the individuals. The main idea behind keeping data in a processable format is to discover the existing data patterns to estimate the future with the highest consistency. Enhancements in data collection, processing and estimation technics bring the strong knowledge from the past, ability to control processes and dominate the future based on the historical data. In other words, technical control on data management promises the power of knowledge to the all stakeholders in management and in many areas mainly in economics, engineering, and medical sciences as well as politics and public relations. One of the leading research area in data management is modeling which are namely stochastic models, statistical models, lineer modeling or fuzzy systems. Fuzzy Models are one of the most trendy and consistently estimating approach for modeling. In this study, the data set of Denmark which contains financial indicators as input and import amounts between 1993 and 2013 as output were used to create 221 different models by using Fuzzy C-Means Clustering Algorithm and Fuzzy Regression Analiysis with different number of clusters and degree of fuzziness in each model. With the help of high number of experimental models, evaluation of model consistency parameter, R-square, depending on the changes of number of clusters and degree of fuzziness have done and several inferences have been achieved. Last but not least, outstanding approach has been developed in this study which is named as Multi-Layer Fuzzy. In this approach more than one membership matrix calculated with at least two different number of cluster and degree of fuzziness values have been used in a single model and higher consistency in the estimations have been achieved as expected
Citation - WoS: 6
Citation - Scopus: 5
Chemical Hydride Powered and Air Breathing Pemfc for Uavs
(IEEE, 2013) Semiz, Levent; Serin, Ramis Berkay; Demirci Sankır, Nurdan; Sankır, Mehmet
In this study, hydrogen gas generation for Proton Exchange Membrane Fuel Cells (PEMFC) was provided using precious catalysts. The critical catalyst concentration value and the effects of the catalyst amount and the sodium borohydride concentration on the hydrogen production rate were analyzed. PEMFC are one of the good candidates for powering unmanned air vehicles due to their low weight and high durability. They can provide longer flying times than lithium ion batteries. Our group manufactured a PEMFC producing 150 W power for unmanned air vehicles and optimized its performance. Moreover, the influence of the compression and the purge valve on and off time on fuel cell performance was investigated.
Citation - WoS: 20
Citation - Scopus: 22
Colloidal Synthesis of Cuins2 Nanoparticles: Crystal Phase Design and Thin Film Fabrication for Photoelectrochemical Solar Cells
(Elsevier, 2018-11-30) Altaf, Çiğdem Tuc; Demirci Sankır, Nurdan
This study reports the colloidal synthesis of copper indium disulfide (CuInS2) nanoparticles in different crystal phases to be employed as thin film photoanodes in photoelectrochemical water splitting process. First, CuInS2 nanoparticles with chalcopyrite-, zincblende-, wurtzite-as well as polytypic-phases have been synthesized using hot injection method. The effects of solvent, temperature and type of precursors on the phase design have been thoroughly investigated via various spectroscopic techniques such as XRD, SEM, HRTEM, UV-Vis and PL spectroscopy and Zeta particle size analysis. The XRD spectra have been revealed that the all the targeted nanoparticles had good crystallinity and free from undesired binary sulfides. The synthesized nanoparticles have been re-dispersed in N, N-dimethylformamide (DMF) to form nanoink paste and applied on fluorine doped tin oxide coated glass substrate by doctor blade technique. DMF has been found to be an enviable solvent for thin film fabrication since it could lead to the crack free and uniform surface formation. The chalcopyrite thin film has shown the best photoelectrochemical performance with the photocurrent density of ∼15 mA cm−2 and conversion efficiency of 6.7%. Howbeit, thin films photoanodes bearing wurtzite, zincblende and polytypic CuInS2 nanoparticles have been investigated to compare the performance of different crystal phases for photoelectrochemical solar cell applications. Moreover, it should be emphasized that all thin film electrodes have been investigated under 1-sun condition without any surface modification, chemical treatment and etching. Additionally, the thin films except wurtzite structure exhibited good stability along 2 h under dark and illuminated conditions.
Citation - WoS: 32
Citation - Scopus: 22
Combination of Inclusive and Differential Tt¯ Charge Asymmetry Measurements Using Atlas and Cms Data at ?s = 7 and 8 Tev
(Springer Verlag, 2018-01) The ATLAS Collaboration; Sultansoy, Saleh
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centreof- mass energies of 7 and 8TeV. The data correspond to integrated luminosities of about 5 and 20 fb–1for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are AC LHC7= 0:005±0:007 (stat) ±0:006 (syst) at 7TeV and AC LHC7= 0:0055 ± 0:0023 (stat) ± 0:0025 (syst) at 8TeV. These values, as well as the combination of AC measurements as a function of the invariant mass of the [formula presented] system at 8TeV, are consistent with the respective standard model predictions. © CERN, for the benefit of the ATLAS-CMS Collaboration.
Citation - WoS: 84
Citation - Scopus: 109
Combination of Searches for Heavy Resonances Decaying Into Bosonic and Leptonic Final States Using 36 Fb-1 of Proton-Proton Collision Data at S =13 Tev With the Atlas Detector
(American Physical Society, 2018-9) The ATLAS Collaboration; Sultansoy, Saleh
Searches for new heavy resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons, are presented using a data sample corresponding to 36.1 fb-1 of pp collisions at s=13 TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting bosonic decay modes in the qqqq, ??qq, ??qq, ??qq, ????, ????, ????, ????, qqbb, ??bb, ??bb, and ??bb final states are combined, searching for a narrow-width resonance. Likewise, analyses selecting the leptonic ?? and ?? final states are also combined. These two sets of analyses are then further combined. No significant deviation from the Standard Model predictions is observed. Three benchmark models are tested: a model predicting the existence of a new heavy scalar singlet, a simplified model predicting a heavy vector-boson triplet, and a bulk Randall-Sundrum model with a heavy spin-2 Kaluza-Klein excitation of the graviton. Cross section limits are set at the 95% confidence level using an asymptotic approximation and are compared with predictions for the benchmark models. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The data exclude a heavy vector-boson triplet with mass below 5.5 TeV in a weakly coupled scenario and 4.5 TeV in a strongly coupled scenario, as well as a Kaluza-Klein graviton with mass below 2.3 TeV. © 2018 CERN, for the ATLAS Collaboration.
Citation - Scopus: 34
Combinations of Single-Top Production Cross-Section Measurements and |f Lv Vtb| Determinations at ?s = 7 and 8 Tev With the Atlas and Cms Experiments
(Springer Verlag, 2019) The ATLAS Collaboration; Sultansoy, Saleh
This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at s = 7 TeV and 12.2 to 20.3 fb−1 at s = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 ± 5.7 pb and 87.7 ± 5.8 pb at s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at s = 8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLV is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |Vtd|, |Vts| ≪ |Vtb|. All the |fLVVtb|2 determinations, extracted from individual ratios at s = 7 and 8 TeV, are combined, resulting in |fLVVtb| = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.[Figure not available: see fulltext.]. © 2019, The Author(s).
Citation - WoS: 32
Citation - Scopus: 44
Combined Measurement of Differential and Total Cross Sections in the H › ?? and the H › Zz? › 4l Decay Channels at S=13 Tev With the Atlas Detector
(Elsevier B.V., 2018-11) The ATLAS Collaboration; Sultansoy, Saleh
A combined measurement of differential and inclusive total cross sections of Higgs boson production is performed using 36.1 fb−1 of 13 TeV proton–proton collision data produced by the LHC and recorded by the ATLAS detector in 2015 and 2016. Cross sections are obtained from measured H→γγ and H→ZZ⁎→4ℓ event yields, which are combined taking into account detector efficiencies, resolution, acceptances and branching fractions. The total Higgs boson production cross section is measured to be 57.0−5.9 +6.0 (stat.) −3.3 +4.0 (syst.) pb, in agreement with the Standard Model prediction. Differential cross-section measurements are presented for the Higgs boson transverse momentum distribution, Higgs boson rapidity, number of jets produced together with the Higgs boson, and the transverse momentum of the leading jet. The results from the two decay channels are found to be compatible, and their combination agrees with the Standard Model predictions. © 2018 The Author(s)
Citation - WoS: 1
Citation - Scopus: 2
Comment on "third Law of Thermodynamics as a Key Test of Generalized Entropies"
(Amer Physical Soc, 2015) Bağcı, Gökhan Barış; Oikonomou, Thomas
Bento et al. [Phys. Rev. E 91, 022105 ( 2015)] state that the Tsallis entropy violates the third law of thermodynamics for q <= 0 and 0 < q < 1. We show that their results are valid only for q >= 1, since there is no distribution maximizing the Tsallis entropy for the intervals q <= 0 and 0 < q < 1 compatible with the system energy expression.
Citation - Scopus: 5
Comparison Between Simulated and Observed Lhc Beam Backgrounds in the Atlas Experiment at E Beam =4 Tev
(Institute of Physics Publishing, 2018-12) The ATLAS Collaboration; Sultansoy, Saleh
Results of dedicated Monte Carlo simulations of beam-induced background (BIB) in the ATLAS experiment at the Large Hadron Collider (LHC) are presented and compared with data recorded in 2012. During normal physics operation this background arises mainly from scattering of the 4 TeV protons on residual gas in the beam pipe. Methods of reconstructing the BIB signals in the ATLAS detector, developed and implemented in the simulation chain based on the \textsc{Fluka} Monte Carlo simulation package, are described. The interaction rates are determined from the residual gas pressure distribution in the LHC ring in order to set an absolute scale on the predicted rates of BIB so that they can be compared quantitatively with data. Through these comparisons the origins of the BIB leading to different observables in the ATLAS detectors are analysed. The level of agreement between simulation results and BIB measurements by ATLAS in 2012 demonstrates that a good understanding of the origin of BIB has been reached. © 2018 CERN for the benefit of the ATLAS collaboration.
Citation - WoS: 43
Citation - Scopus: 75
Constraints on Mediator-Based Dark Matter and Scalar Dark Energy Models Using ?s = 13 Tev Pp Collision Data Collected by the Atlas Detector
(Springer Verlag, 2019) The ATLAS Collaboration; Sultansoy, Saleh
Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb−1s = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this paper. The results of experimental searches in a variety of final states are interpreted in terms of a set of spin-1 and spin-0 single-mediator dark matter simplified models and a second set of models involving an extended Higgs sector plus an additional vector or pseudo-scalar mediator. The searches considered in this paper constrain spin-1 leptophobic and leptophilic mediators, spin-0 colour-neutral and colour-charged mediators and vector or pseudo-scalar mediators embedded in extended Higgs sector models. In this case, also s = 8 TeV pp collision data are used for the interpretation of the results. The results are also interpreted for the first time in terms of light scalar particles that could contribute to the accelerating expansion of the universe (dark energy).[Figure not available: see fulltext.]. © 2019, The Author(s).

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