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ArticlePublication Open Access A 1GS/s, 9-bits DAC interleaved (2+1)-bit then 2-bit per cycle SAR ADC(Istanbul University, 2020-07) El-Sawy, Salma; Tekin, Ahmet; Electrical & Electronics Engineering; TEKİN, Ahmet; El-Sawy, SalmaThis paper presents a high speed Successive Approximation Register Analog to Digital Converter (SAR ADC) for low-noise low-power satellite transceiver applications. The system is a (2+1) then 2-bit per cycle SAR ADC of 1GS/s sampling rate, 9-bits resolution designed in a 65nm standard CMOS technology. The system resolves 9 bits with a special switching scheme in a total of 4 cycles per sample. This is achieved by interleaving 4 Capacitive Digital to Analog Converter (C-DACs) of unit capacitance 1fF. Since the interleaving is limited to the DACs only which match well, the design does not suffer from the drawbacks of full interleaving. Hence, better power efficiency and performance metrics were obtained in comparison to regular interleaved ADCs. A special timing with an extra first bit comparator is optimized to leave proper timing margins for every step from a single 4-GHz low noise clock source which is readily available in the 8- GHz direct conversion front-end. This comparator is reused as all the other active comparators in the both interleaving phases. The proposed design achieved an effective number of bits (ENOB) of 8.2 bits at Nyquist with power consumption of 12mW, resulting in a Figure of Merit (FoM) of 38.37 fJ/conversion-step.PresentationPublication Open Access 21. Yüzyıl İçin İstenen/Gerekli Kütüphaneci Becerileri ve Kariyer Planlaması(2011-10-11) Cribb, Gülçin; Library; CRIBB, Gülçin21. yüzyılın değişen koşullarında kütüphane bir kütüphanecinin eleştirel düşünme ve çözüm bulma, iletişim, takım çalışması ve işbirliği ve yaratıcılık ve yenilikçi olma gibi özelliklere sahip olması gerektiği dikkat çekmektedir. Kütüphanecinin bu yeni koşullara uyum sağlaması son derece büyük bir önem taşımaktadır.Conference paperItem Open Access 21. yüzyıl trendleri ve akademik kütüphanelerle ilişkisi(Üniversite ve Araştırma Kütüphanecileri Derneği, 2020) İspir, Zeynep; Torlak, Duhan; Çakmak, N.; Şenyurt, Ö.; Özkol, İ.; Öztürk, B.21. yüzyılda ivme kazanan teknolojik gelişmeler her alanı olduğu gibi kütüphaneleri de etkilemiştir. Bu gelişmelere paralel olarak kütüphaneler ve bilgi uzmanları bu yüzyılda kullanıcıların farklı ihtiyaçları ile karşılaşmışlardır. Kullanıcıların verilen hizmetlere hızlı, kolay ve kusursuz olarak erişim sağlama arzularını karşılamak, özellikle akademik kütüphaneler için başlıca değişim unsuru olmuştur. Bu değişim; bilgiye erişim, kaynaklardaki format değişiklikleri, açık erişim hareketi, değişen kütüphane mekânları, zaman ve mekândan bağımsız hizmet, kurumsal arşiv, yayın analizleri gibi ögeleri bünyesinde bulundurur. Kütüphaneciler de bu değişime uyum sağlayarak, akademik performansların ölçülmesine katkıda bulunmak, derslerle entegre bilgi okuryazarlığı hizmetlerini yürütmek ve sosyal medyayı etkin kullanmak gibi farklı alanlarda uzmanlaşmış ve yeni unvanlar almışlardır. Kullanıcıların gereksinimlerini karşılamak için gerekli temel yetkinliklere sahip olan kütüphaneciler, içinde bulunduğumuz yüzyılın trendleri ile birlikte yeni fırsat ve zorluklarla karşılaşmışlardır. Bu çalışmada 21. Yüzyılda trendlerin akademik kütüphanelere etkileri ve kütüphanecilerin karşılaştığı fırsat ve zorluklar üzerinde durulmuş, sürecin getirdiği sorular yanıtlanmaya çalışılmıştır.Conference paperPublication Open Access 3-D dynamic walking trajectory generation for a bipedal exoskeleton with underactuated legs: A proof of concept(IEEE, 2019-06) Soliman, Ahmed Fahmy; Şendur, Polat; Uğurlu, Regaip Barkan; Mechanical Engineering; ŞENDUR, Polat; UĞURLU, Regaip Barkan; Soliman, Ahmed FahmyThis paper presents a framework to address three dimensional (3-D) dynamic walking for a bipedal exoskeleton with underactuated legs. To achieve this goal, the framework is constructed via a trajectory generator and an optimized inverse kinematics algorithm that can cope with underactuation. In order to feasibly attain task velocities with underactuated legs, the inverse kinematics algorithm makes use of a task prioritization method via the exploitation of null space. In doing so, the tasks with lower priority, e.g., swing foot orientation, are attained as much as possible without disrupting the higher priority tasks, such as CoM trajectory. Meanwhile, the trajectory generator utilizes the ZMP concept analytically and ensures the acceleration continuity throughout the whole walking period, regardless of the contact and phase changes. The proposed method is verified via a lumped human-bipedal exoskeleton model that is developed and simulated in MSC.ADAMS simulation environment. As a result, we obtained feasible and dynamically balanced 3-D walking motion, in which no oblique foot landing or exaggerated torso orientation variations were observed, despite the underactuated nature of the robot legs.ArticlePublication Open Access A 3-DoF robotic platform for the rehabilitation and assessment of reaction time and balance skills of MS patients(Public Library of Science, 2023-02-24) Ersoy, Tuğçe; Hocaoğlu, E.; Ersoy, TuğçeThe central nervous system (CNS) exploits anticipatory (APAs) and compensatory (CPAs) postural adjustments to maintain the balance. The postural adjustments comprising stability of the center of mass (CoM) and the pressure distribution of the body influence each other if there is a lack of performance in either of them. Any predictable or sudden perturbation may pave the way for the divergence of CoM from equilibrium and inhomogeneous pressure distribution of the body. Such a situation is often observed in the daily lives of Multiple Sclerosis (MS) patients due to their poor APAs and CPAs and induces their falls. The way of minimizing the risk of falls in neurological patients is by utilizing perturbation-based rehabilitation, as it is efficient in the recovery of the balance disorder. In light of the findings, we present the design, implementation, and experimental evaluation of a novel 3 DoF parallel manipulator to treat the balance disorder of MS. The robotic platform allows angular motion of the ankle based on its anthropomorphic freedom. Moreover, the end-effector endowed with upper and lower platforms is designed to evaluate both the pressure distribution of each foot and the CoM of the body, respectively. Data gathered from the platforms are utilized to both evaluate the performance of the patients and used in high-level control of the robotic platform to regulate the difficulty level of tasks. In this study, kinematic and dynamic analyses of the robot are derived and validated in the simulation environment. Low-level control of the first prototype is also successfully implemented through the PID controller. The capacity of each platform is evaluated with a set of experiments considering the assessment of pressure distribution and CoM of the foot-like objects on the end-effector. The experimental results indicate that such a system well-address the need for balance skill training and assessment through the APAs and CPAs.ArticlePublication Open Access 3D neuromorphic wireless power transfer and energy transmission based synaptic plasticity(IEEE, 2019) Gülbahar, Burhan; Electrical & Electronics Engineering; GÜLBAHAR, Burhan CahitEnergy consumption combined with scalability and 3D architecture is a fundamental constraint for brain-inspired computing. Neuromorphic architectures including memristive, spintronic, and floating gate metal-oxide-semiconductors achieve energy efficiency while having challenges of 3D design and integration, wiring and energy consumption problems for architectures with massive numbers of neurons and synapses. There are bottlenecks due to the integration of communication, memory, and computation tasks while keeping ultra-low energy consumption. In this paper, wireless power transmission (WPT)-based neuromorphic design and theoretical modeling are proposed to solve bottlenecks and challenges. Neuron functionalities with nonlinear activation functions and spiking, synaptic channels, and plasticity rules are designed with magneto-inductive WPT systems. Tasks of communication, computation, memory, and WPT are combined as an all-in-one solution. Numerical analysis is provided for microscale graphene coils in sub-terahertz frequencies with unique neuron design of coils on 2D circular and 3D Goldberg polyhedron substrates as a proof-of-concept satisfying nonlinear activation mechanisms and synaptic weight adaptation. Layered neuromorphic WPT network is utilized to theoretically model and numerically simulate pattern recognition solutions as a simple application of the proposed system design. Finally, open issues and challenges for realizing WPT-based neuromorphic system design are presented including experimental implementations.TefrikaItem Open Access Acaib-i âlem(1882-03) Ahmet MithatArticlePublication Open Access Accelerating discovery of COFs for CO2 capture and H2 purification using structurally guided computational screening(Elsevier, 2022-01-01) Aksu, G. O.; Fındıkçı, İlknur Eruçar; Haslak, Z. P.; Keskin, S.; Mechanical Engineering; FINDIKÇI, Ilknur EruçarScreening of hypothetical covalent organic framework (hypoCOF) database enables to go beyond the current synthesized structures to design high-performance materials for CO2 separation. In this work, we followed a structurally guided computational screening approach to find the most promising candidates of hypoCOF adsorbents and membranes for CO2 capture and H2 purification. Grand canonical Monte Carlo (GCMC) simulations were used to evaluate CO2/H2 separation performance of 3184 hypoCOFs for pressure-swing adsorption (PSA) and vacuum-swing adsorption (VSA) processes. CO2/H2 adsorption selectivities and CO2 working capacities of hypoCOFs were calculated in the range of 6.13–742 (6.39–954) and 0.07–8.68 mol/kg (0.01–3.92 mol/kg), achieving higher values than those of experimentally synthesized COFs at PSA (VSA) conditions. Density functional theory (DFT) calculations revealed that the strength of hydrogen bonding between CO2 and the functional group of linkers is an important factor for determining the CO2 selectivity of hypoCOFs. The most predominant topologies and linker types were identified as bor and pts, linker91 (a triazine linker) and linker92 (a benzene linker) for the top-performing hypoCOF adsorbents, respectively. Molecular dynamics (MD) simulations of 794 hypoCOFs showed that they exceed the Robeson's upper bound by outperforming COF, zeolite, metal organic framework (MOF), and polymer membranes due to their high H2/CO2 selectivities, 2.66–6.14, and high H2 permeabilities, 9×105–4.5×106 Barrer. Results of this work will be useful to guide the synthesis of novel materials by providing molecular-level insights into the structural features of hypothetical COFs to achieve superior CO2 separation performance.Conference paperPublication Open Access Accommodating Shifting User Expectations(2011-11-08) Cribb, Gülçin; Schmidt, J.; Library; CRIBB, GülçinWhether they are called netgeners, born digital, digital natives, screenagers, Generation Y or Generation Z, the current and next generation of library users want everything, and they want it now. They communicate constantly, tapping and swiping I-Phones, I-Pads and androids as they broadcast their daily activities via Twitter and Facebook. They rarely sit still and do nothing and do not discriminate in using technology between their personal and professional lives – studying, working and living are all integrated in the mashed-up infosphere. They are readers, viewers, listeners, writers and speakers and use a variety of media. What use do they make of libraries? What do they want from us? How do library buildings accommodate their needs? One emerging trend is the need for silence – the generation who communicates constantly via their fingers and thumbs and the photographic record seems to want quieter spaces in libraries. They remain voyeurs and view others at work and play – but more silently it seems, although they still want opportunities to meet with others and discuss learning and life – preferably with food and drink. They are serious about what they do and want to be treated with respect and empathy. Digital natives want their information resources delivered seamlessly with voice and vision included, not just words on paper or on a screen. In Google we Trust is their mantra and if it is on the web, it must be true. Digital natives have difficulty evaluating what they find and tend to regard all information as equal in value. Their approach to scholarship and learning needs to be developed. They regard the full output of scholarly work in one continuum whether it is real or virtual. And the library buildings for this generation? Digital natives want attractive buildings which are easy to use and provide pleasant environments and a relaxing space with plenty of technology. They want to plug in, power up and prowl the internet. They want “high tech” but they also want “high touch”. They want individual personalized help wherever they might be – and at varying times of day – my place, my space, my time – and targeted to my needs. The paper explores the needs of digital natives and some of the possible changes in library building design to accommodate the shifting sand of user needs.ArticlePublication Open Access Accuracy limits of pair distribution function analysis in structural characterization of nanocrystalline powders by X-ray diffraction(Turkish Chemical Society, 2022) Baloochiyan, Abolfazl; Batyrow, Merdan; Öztürk, Hande; Mechanical Engineering; KAYMAKSÜT, Hande Öztürk; Baloochiyan, Abolfazl; Batyrow, MerdanWe report the minimum errors of structural parameters, namely lattice parameter, crystallite size, and atomic displacement parameters, expected from Pair Distribution Function (PDF) analysis of nanocrystalline gold powders for the first time by a self-consistent computational methodology. Although PDF analysis has been increasingly used to characterize nanocrystalline powders by X-rays, the current literature includes no established error bounds to be expected from the resulting structural parameters. For accurate interpretation of X-ray diffraction data, these error bounds must be determined, and the obtained structural parameters must be cleared from them. Our novel methodology includes: 1) simulation of ideal powder diffraction experiments with the use of the Debye scattering equation, 2) pair distribution function analysis of the diffraction data with the Diffpy-CMI analysis software, and 3) determination of the errors from PDF analysis of the simulated diffraction data by comparing them with real-space analysis of spherical gold nanocrystals that are 30 nm size and smaller. Our results show that except for the lattice parameters and even with an ideal crystalline powder sample and ideal diffraction data, the extracted structural parameters from PDF analysis diverge from their true values for the studied nanopowder. These deviations are dependent on the average size of the nanocrystals and the energy of the X-rays selected for the diffraction experiments, where lower X-ray energies and small-sized nanocrystalline powders lead to greater errors.policy.listelement.badgeItem Open Access Açık Erişim ve Akademik Arşiv Politikası(Özyeğin University, 2020-05-03) Özyeğin ÜniversitesiBu politikanın amacı Özyeğin Üniversitesi mensuplarının üniversite adresli bilimsel araştırma çıktılarının internet aracılığı ile tüm dünyaya ücretsiz olarak açık erişim prensipleri çerçevesinde erişime açık olarak sağlanmasıdır. Bu politika ile bilimsel çıktıların görünürlüğünün anında sağlanmasının yanı sıra entelektüel mirasın korunması ve muhafazası da sağlanır. Araştırma yayınlarının açık erişim yolu ile yayınlanması, hem üniversitenin hem de araştırmacıların tüm dünyada daha iyi tanınmasına ve araştırmaların daha fazla atıf almasına yardımcı olacak; ayrıca üniversitenin saygınlığını ve tanınırlığını arttıracaktır. Kapsam içeriğinde olan yayınlar araştırma çıktıları, makaleler, konferans bildirileri, yüksek lisans ve doktora tezleri, kitap bölümleri veya diğer yayınların ön baskısı, son baskısı ya da yayıncı sürümüdür. Bununla birlikte fon sağlayıcı kuruluşlarca desteklenen proje çıktıları, Özyeğin Üniversitesi bünyesinde düzenlenen bilimsel içerikli seminer ve konferanslar da akademik arşiv kapsamındadır.TefrikaItem Open Access Acımak(1927-10) Güntekin, Reşat NuriConference paperPublication Open Access ACNMP: skill transfer and task extrapolation through learning from demonstration and reinforcement learning via representation sharing(ML Research Press, 2020) Akbulut, M. T.; Öztop, Erhan; Xue, H.; Tekden, A. E.; Şeker, M. Y.; Uğur, E.; Computer Science; ÖZTOP, ErhanTo equip robots with dexterous skills, an effective approach is to first transfer the desired skill via Learning from Demonstration (LfD), then let the robot improve it by self-exploration via Reinforcement Learning (RL). In this paper, we propose a novel LfD+RL framework, namely Adaptive Conditional Neural Movement Primitives (ACNMP), that allows efficient policy improvement in novel environments and effective skill transfer between different agents. This is achieved through exploiting the latent representation learned by the underlying Conditional Neural Process (CNP) model, and simultaneous training of the model with supervised learning (SL) for acquiring the demonstrated trajectories and via RL for new trajectory discovery. Through simulation experiments, we show that (i) ACNMP enables the system to extrapolate to situations where pure LfD fails; (ii) Simultaneous training of the system through SL and RL preserves the shape of demonstrations while adapting to novel situations due to the shared representations used by both learners; (iii) ACNMP enables order-of-magnitude sample-efficient RL in extrapolation of reaching tasks compared to the existing approaches; (iv) ACNMPs can be used to implement skill transfer between robots having different morphology, with competitive learning speeds and importantly with less number of assumptions compared to the state-of-the-art approaches. Finally, we show the real-world suitability of ACNMPs through real robot experiments that involve obstacle avoidance, pick and place and pouring actions.ArticlePublication Open Access Active compliance control reduces upper body effort in exoskeleton-supported walking(IEEE, 2020-04) Uğurlu, Regaip Barkan; Oshima, H.; Sariyildiz, E.; Narildyo, T.; Babic, J.; Mechanical Engineering; UĞURLU, Regaip BarkanThis article presents a locomotion controller for lower limb exoskeletons so as to enable the combined robot and user system to exhibit compliant walking characteristics when interacting with the environment. This is of critical importance to reduce the excessive ground reaction forces during the walking task execution with the aim of improved environmental interaction capabilities. In robot-aided walking support for paraplegics, the user has to actively use his/her upper limbs via crutches to ensure overall balance. By virtue of this requisite, several issues may particularly arise during touchdown instants, e.g., upper body orientation fluctuates, shoulder joints are subject to excessive loading, and arms may need to exert extra forces to counterbalance these effects. In order to reduce the upper body effort via compliant locomotion, the controller is designed to manage the force/position tradeoff by using an admittance controller in each joint. For proof of concept, a series of exoskeleton-aided walking experiments were conducted with the participation of nine healthy volunteers, four of whom additionally walked on an irregular surface for further performance evaluation. The results suggest that the proposed locomotion controller is advantageous over conventional high-gain position tracking in decreasing undesired oscillatory torso motion and total arm force, adequately reducing the required upper body effort.ArticlePublication Open Access Active-grid turbulence effect on the topology and the flame location of a lean premixed combustion(Society of Thermal Engineers of Serbia, 2018) Alhumairi, Mohammed Khudhair Abbas; Ertunç, Özgür; Mechanical Engineering; ERTUNÇ, Özgür; Alhumairi, Mohammed Khudhair AbbasLean premixed combustion under the influence of active-grid turbulence was computationally investigated, and the results were compared with experimental data. The experiments were carried out to generate a premixed flame at a thermal load of 9 kW from a single jet flow combustor. Turbulent combustion models, such as the coherent flame model (CFM) and turbulent flame speed closure (TFC) model were implemented for the simulations performed under different turbulent flow conditions, which were specified by the Reynolds number based on Taylor’s microscale (Reλ), the dissipation rate of turbulence (ε) and turbulent kinetic energy (k). This study shows that the applied turbulent combustion models differently predict the flame topology and location. However, similar to the experiments, simulations with both models revealed that the flame moves toward the inlet when turbulence becomes strong at the inlet, that is, when Reλ at the inlet increases. The results indicated that the flame topology and location in the coherent flame model were more sensitive to turbulence than those in the turbulent flame speed closure model. The flame location behavior on the jet flow combustor significantly changed with the increase of Reλ.ArticlePublication Open Access Actor-critic reinforcement learning for bidding in bilateral negotiation(TÜBİTAK, 2022) Arslan, Furkan; Aydoğan, Reyhan; Computer Science; AYDOĞAN, Reyhan; Arslan, FurkanDesigning an effective and intelligent bidding strategy is one of the most compelling research challenges in automated negotiation, where software agents negotiate with each other to find a mutual agreement when there is a conflict of interests. Instead of designing a hand-crafted decision-making module, this work proposes a novel bidding strategy adopting an actor-critic reinforcement learning approach, which learns what to offer in a bilateral negotiation. An entropy reinforcement learning framework called Soft Actor-Critic (SAC) is applied to the bidding problem, and a self-play approach is employed to train the model. Our model learns to produce the target utility of the coming offer based on previous offer exchanges and remaining time. Furthermore, an imitation learning approach called behavior cloning is adopted to speed up the learning process. Also, a novel reward function is introduced that does take not only the agent’s own utility but also the opponent’s utility at the end of the negotiation. The developed agent is empirically evaluated. Thus, a large number of negotiation sessions are run against a variety of opponents selected in different domains varying in size and opposition. The agent’s performance is compared with its opponents and the performance of the baseline agents negotiating with the same opponents. The empirical results show that our agent successfully negotiates against challenging opponents in different negotiation scenarios without requiring any former information about the opponent or domain in advance. Furthermore, it achieves better results than the baseline agents regarding the received utility at the end of the successful negotiations.Conference paperPublication Open Access Adaptation to internet-based services by seniors in Turkey(The Design Society, 2018) Kuzuluk, Nisan; Balkaya, Melike; Güner, Güney; Ekströmer, P.; Schütte, S.; Ölvander, J.; Kuzuluk, Nisan; Balkaya, Melike; Güner, GüneyThe motivation of this article is to analyze and define the barriers and opportunities in senior people’s adaptation to the Internet-based services in Turkey. Digitalization has emerged in developed countries where people’s lifestyle was molded by it, then the technology diffused to the developing countries including Turkey. With this emergence, internet-based applications have entered into people’s daily life activities such as shopping and using banking services. However, Turkey can be seen as a late-adopter of these digital technologies, yet Turkish companies have been fairly quick in adaptation and improving internet-based services to local needs. Today, many young and middle-aged users in Turkey are using above-mentioned services, and they take internet-based applications for granted in their daily life activities. On the other hand, senior people could not catch up with the diffusion of these kinds of internet-based services. There seem to be barriers to the adaptation of elderly people to the digitalized world and it seems to prevent usage of internet-based applications which makes accomplishing those tasks easier. A design researcher’s perspective can point out opportunity areas and provide innovative solutions to overcome barriers to adaptation. In this study, our approach is to conduct ethnographic interviews with senior people in Turkey in order to understand how they use internet-based services and how digitalization in this aspect is affecting their life. The second part of this study is to understand internet-based service providers’ perspective. By conducting interviews at service provider companies, we aim to understand their approach regarding the inclusion of senior users. As a result, service providers and end users will be examined simultaneously, therefore deeper analysis and conclusions will be obtained. To our knowledge, there is no research study investigating adaptation to internet-based services of seniors in Turkey from a design research perspective. As a conclusion, this study investigates the barriers in the adaptation of internet-based services by senior people in Turkey, and the study aims to find opportunities where design can help with the integration of the digital world and senior people.Conference paperPublication Open Access Adaptive OFDM-based acoustic underwater transmission: system design and experimental verification(IEEE, 2017) Sadeghi, Mohammad; Elamassie, Mohammed; Uysal, Murat; Electrical & Electronics Engineering; UYSAL, Murat; Sadeghi, Mohammad; Elamassie, MohammedIn this paper, we present the design and implementation of a software defined orthogonal frequency division multiplexing (OFDM)-based underwater acoustic (UWA) communication system with link adaptation. Our system implementation is based on the customized versions of National Instruments Universal Software Radio Peripheral (USRP). The modified USRPs are interfaced with hydrophone front-ends for acoustic transmission. We investigate the performance of various adaptive algorithms where both modulation order/type and power on each subcarrier are selected based on channel conditions in order to maximize throughput. The experimental in-pool test results verify the superiority of adaptive transmission.ArticlePublication Open Access Adaptive pairs trading strategy performance in Turkish derivatives exchange with the companies listed on Istanbul stock exchange(Springer International Publishing, 2012-03-02) Bolgün, K. E.; Kurun, E.; Güven, Serhat; Güven, SerhatWe implemented model-driven statistical arbitrage strategies in Turkish equities market. Trading signals are generated by optimized parameters of distance method. When the trade in signal is triggered by the model, market-neutral portfolio is created by long in the synthetic ETF, which is based on constrained least squares regression of selected Istanbul Stock Exchange stocks and short in Turkish Derivatives Exchange (Turkdex) index futures contract. We performed pairs trading strategy based on a comparative mean reversion of asset prices with daily data over the period February 2005 through July 2011 in Istanbul Stock Exchange (ISE) and Turkdex. We constructed a hypothetical ISE30 ETF Index on a daily basis in order to originate pairs trading strategy with Turkdex. Because of the leverage rule of (1–10) index futures contracts, we had to evaluate spot stock pairs formation with futures contracts pairs strategy. The results indicate that applied pairs strategy produced overall returns of 901 per cent during the investment period, whereas naive strategy (buy and hold ISE-30 index) return for the same period was 111 per cent. Similar outperformance was observed in the Sharpe and Sortino ratios.ArticlePublication Open Access Addendum: Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at √s=13 TeV(Springer, 2022-12-07) Tumasyan, A.; Işıldak, Bora; The CMS Collaboration; Natural and Mathematical Sciences; IŞILDAK, BoraThe QCD analysis at NNLO is repeated by using the NNLO interpolation grids for the double-differential inclusive jet cross section [1], which were released after the journal publication of the original analysis. The NNLOJET calculation used to derive these grids is based on the leading-colour and leading-flavour-number approximation and does not include the most recent subleading colour contributions. However, these contributions were reported in ref. [2] to be very small in inclusive jet production, in particular for a jet size of R = 0.7. The grids also contain an estimate of the numerical integration uncertainty of around 1% or less. To account for point-to-point fluctuations, this uncertainty, after consultation with the authors of NNLOJET, has been increased by a factor of two; however, its impact in the fit is negligible. A comparison of the measurement with predictions using various PDFs is shown in figure 1. Although the PDF parametrisation remains identical, higher precision in PDF and QCD parameters is expected by using NNLO grids consistently in the QCD analysis. These new results supersede those obtained by using the k-factor technique.