Search for jet extinction in the inclusive jet-pT spectrum from proton-proton collisions at s=8 TeV

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.The first search at the LHC for the extinction of QCD jet production is presented, using data collected with the CMS detector corresponding to an integrated luminosity of 10.7  fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The extinction model studied in this analysis is motivated by the search for signatures of strong gravity at the TeV scale (terascale gravity) and assumes the existence of string couplings in the strong-coupling limit. In this limit, the string model predicts the suppression of all high-transverse-momentum standard model processes, including jet production, beyond a certain energy scale. To test this prediction, the measured transverse-momentum spectrum is compared to the theoretical prediction of the standard model. No significant deficit of events is found at high transverse momentum. A 95% confidence level lower limit of 3.3 TeV is set on the extinction mass scale

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 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-T(miss)). A second aspect is chargino-neutralino pair production, leading to hW states with E-T(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

Minimum flow time

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Approximation schemes for bin packing

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Oblivious routing

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Multi-level feedback queues

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The Currency and Change of Compendia of Model Writings of Wang XiZhi（集王羲之行書）in Northern Song Dynasty

本文以「集王羲之行書」（以下簡稱「集王行書」）為風格脈絡，討論該書風在北宋的流傳情形。若以題跋文字與傳世墨跡來研究，「集王行書」在此期的樣貌無法完全呈現。然而藉由金石書籍與石刻史料的運用，可以勾勒出「集王行書」在此期的流變。筆者用「集王行書」而不用僧懷仁〈集字聖教序〉這一作品，主要是從北宗的金石書籍與題跋文字無法得知當時有影響力的文人見過僧懷仁〈集字聖教序〉，但見過「集王行書」，「集王行書」大量出現在北宋的金石著錄而非題跋文字，這和石刻書跡的傳真性不足以作為書法的學習，因此不被北宋文人接受有關。最後藉由石刻史料的運用，勾勒出 「集王行書」在北宋的流 行脈絡 。在宋真 朝以前和唐代的關 係密切，分別存在於佛教系統與宮廷系統，且書風無 太大改變。唐代宮廷系統的「集王行書」用於皇室墓誌；北宋宮廷系統的「集王行書」，又稱「院體」，用於對外的官方文告。宋哲宗朝以後， 佛教系統消失；宮廷系統的「院體」產生了變化，這 和院體書吏由伎術官轉換成士流的 管道，從北宋真宗 至神宗朝逐次削減有相當的影響 。This essay discusses the development of Compendia of Model Writings of Wang XiZhi in the Northern Song dynasty (960-1126) based on its context. However, images of this style cannot be seen from the colophons or the hand writings which still remain nowadays, but directly through the books of Epigraphy and stone carving, we can draw the contour of the currency and change of Compendia of Model Writings of Wang XiZhi. From the colophons there is no proof that any of the literati who had great influence on calligraphy had seen“Preface to Sacred Teachings”（集字聖教序）, so the author uses the term Compendia of Model Writings of Wang XiZhi instead of “Preface to Sacred Teachings”, but it is known that they had seen Compendia of Model Writings of Wang XiZhi. This essay first intends to discuss if Compendia of Model Writings of Wang XiZhi and“Preface to Sacred Teachings” have the same concept of style. Secondly, this essay intends to explain why Compendia of Model Writings of Wang XiZhi appeared in the Northern Song Epigraphy documents but did not appear in the colophons of the same period. This is related to their writing style. Compendia of Model Writings of Wang XiZhi belongs to stone carving, and to copy or use that style as the model of calligraphy learning was not accepted by the Northern Song literati. The author then uses the historical materials from stone carvings to describe the trend of using or learning Compendia of Model Writings of Wang XiZhi in the Northern Song dynasty. Before the rein of Emperor Zhenzong (998-1022), there had been an intimate relationship with Tang Dynasty style, the style that had been practiced separately for Buddhist writing and also court writing, and this style didn’t change much. After the rein of Emperor Zhezong (1086-1100), it disappeared from Buddhism writing, and Compendia of Model Writings of Wang XiZhi in court, known as “academy style (Yuanti)” had changed. The reason for this change was that the channel of becoming scholar-officials from the skilled officials changed during the rein of Emperor Zhenzong to Shenzong (1023-1085) with fewer high officials drawn from the ranks of the court writing officials