8 research outputs found
Patent Citations and International Knowledge Flow: The Cases of Korea and Taiwan
- Publication venue
- Publication date
- Field of study
This paper examines patterns of knowledge diffusion from US and Japan to Korea and Taiwan using patent citations as an indicator of knowledge flow. We estimate a knowledge diffusion model using a data set of all patents granted in the U.S. to inventors residing in these four countries. Explicitly modeling the roles of technology proximity and knowledge decay and knowledge diffusion over time, we have found that knowledge diffusion from US and Japan to Korea and Taiwan exhibits quite different patterns. It is much more likely for Korean patents to cite Japanese patents than US patents, whereas Taiwanese inventors tend to learn evenly from both US and Japanese inventors. The frequency of a Korean patent citing a Japanese patent is almost twice that of the frequency of a Taiwanese patent citing a Japanese patent. We also find that a patent is much more likely to cite a patent from its own technological field than from another field.
Patent citations and international knowledge flow
- Publication venue
- 'Cambridge Medicine Journal'
- Publication date
- 01/01/2001
- Field of study
Ownership, performance, and innovation in China's large- and medium-size industrial enterprise sector
- Publication venue
- 'Elsevier BV'
- Publication date
- Field of study
“Loyal and Martial” until the End
- Author
- Allāh Rashīd al-Dīn Fadl
- Atwood Christopher P.
- Atwood Christopher P.
- Atwood Christopher P.
- Biran Michal.
- Buell Paul D.
- Ch’i-ch’ing Hsiao
- Cleaves Francis Woodman.
- Cleaves Francis Woodman.
- Cleaves Francis Woodman.
- Cleaves Francis Woodman.
- Dang Baohai
- Dardess John W.
- de Rachewiltz Igor
- De Smedt Albert
- Debreczeny Karl.
- Farquhar David M.
- Fu Shen C.Y.
- Guan Liu
- Hiroshi Watanabe
- Holmgren Jennifer.
- Hucker Charles O.
- Jiajia Zhang
- Jufu Cheng
- Junyi Li
- Landa Ishayahu.
- Lessing Ferdinand D.
- Mingde Cui
- Minzhong Liu
- Nobuhiro Uno
- Pelliot Paul.
- Pozdneev Aleksey.
- Pyurbeev G.Z.
- Ratchnevsky Paul.
- Reiko Shinno
- Rossabi Morris.
- Schinz Alfred.
- Shiduan Xu
- Shusen Qiu
- Steinhardt Nancy Shatzman.
- Steinhardt Nancy Shatzman.
- Tietai Gao
- Togan İsenbike
- Xiaopin Yin
- Xing Shao
- Yiyou Li
- Yule Henry.
- Yuming Luo
- Zhichang Li
- Zhiyi Liu
- Zhizhang Jin
- Zuchang Ma
- Zuguang Hu
- Zuguang Hu
- Zuguang Hu
- Publication venue
- 'Informa UK Limited'
- Publication date
- Field of study
Measurement of differential cross sections for Z boson production in association with jets in proton-proton collisions at √s=13TeV
- Publication venue
- Publication date
- 01/01/2018
- Field of study
The production of a Z boson, decaying to two charged leptons, in association with jets in proton-proton collisions at a centre-of-mass energy of 13TeV is measured. Data recorded with the CMS detector at the LHC are used that correspond to an integrated luminosity of 2.19fb-1. The cross section is measured as a function of the jet multiplicity and its dependence on the transverse momentum of the Z boson, the jet kinematic variables (transverse momentum and rapidity), the scalar sum of the jet momenta, which quantifies the hadronic activity, and the balance in transverse momentum between the reconstructed jet recoil and the Z boson. The measurements are compared with predictions from four different calculations. The first two merge matrix elements with different parton multiplicities in the final state and parton showering, one of which includes one-loop corrections. The third is a fixed-order calculation with next-to-next-to-leading order accuracy for the process with a Z boson and one parton in the final state. The fourth combines the fully differential next-to-next-to-leading order calculation of the process with no parton in the final state with next-to-next-to-leading logarithm resummation and parton showering. © 2018, CERN for the benefit of the CMS collaboration
Measurements of triple-differential cross sections for inclusive isolated-photon+jet events in p p collisions at √s=8TeV
- Publication venue
- Publication date
- 01/01/2019
- Field of study
Measurements are presented of the triple-differential cross section for inclusive isolated-photon+jet events in p p collisions at s=8 TeV as a function of photon transverse momentum (pTγ), photon pseudorapidity (ηγ), and jet pseudorapidity (ηjet). The data correspond to an integrated luminosity of 19.7fb-1 that probe a broad range of the available phase space, for | ηγ| < 1.44 and 1.57 < | ηγ| < 2.50 , | ηjet| < 2.5 , 40<pTγ<1000GeV, and jet transverse momentum, pTjet, > 25GeV. The measurements are compared to next-to-leading order perturbative quantum chromodynamics calculations, which reproduce the data within uncertainties. © 2019, CERN for the benefit of the CMS collaboration
Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in pp collisions at √s=13Te
- Publication venue
- Publication date
- 01/01/2019
- Field of study
A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, Δϕ12, is presented. The measurement considers events where the two leading jets are nearly collinear (“back-to-back”) in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of 13Te and corresponding to an integrated luminosity of 35.9fb-1 are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with the measurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region 177 ∘< Δϕ12< 180 ∘. The 2- and 3-jet measurements are not simultaneously described by any of models. © 2019, CERN for the benefit of the CMS collaboration
Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at √s=13TeV
- Publication venue
- Publication date
- 01/01/2017
- Field of study
A search is presented for an excess of events with heavy-flavor quark pairs (tt¯ and bb¯) and a large imbalance in transverse momentum in data from proton–proton collisions at a center-of-mass energy of 13TeV. The data correspond to an integrated luminosity of 2.2fb-1 collected with the CMS detector at the CERN LHC. No deviations are observed with respect to standard model predictions. The results are used in the first interpretation of dark matter production in tt¯ and bb¯ final states in a simplified model. This analysis is also the first to perform a statistical combination of searches for dark matter produced with different heavy-flavor final states. The combination provides exclusions that are stronger than those achieved with individual heavy-flavor final states. © 2017, CERN for the benefit of the CMS collaboration