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Importance of proper renormalization scale-setting for QCD testing at colliders

Frontiers of physics 2016年第1期11卷 27-37页

作者： Xing-Gang Wu Sheng-Quan Wang stanley J. Brodsky Department of Physics Chongqing University Chongqing 401331 China School of Science Guizhou Minzu University Guiyang 550025 China SLA C National Accelerator Laboratory Stanford University Stanford CA 94039 USA

A primary problem affecting perturbative quantum chromodynamic （pQCD） analyses is the lack of a method for setting the QCD running-coupling renormalization scale such that maximally precise fixed-order predictions for physical observables are obtained. The Principle of Maximum Conformality （PMC） eliminates the ambiguities associated with the conventional renormalization scale-setting procedure, yielding predictions that are independent of the choice of renormalization scheme. The QCD coupling scales and the effective number of quark flavors are set orderby-order in the pQCD series. The PMC has a solid theoretical foundation, satisfying the standard renormalization group invariance condition and all of the self-consistency conditions derived from the renormalization group. The PMC scales at each order are obtained by shifting the arguments of the strong force coupling constant as to eliminate all non-conformal {βi} terms in the pQCD series. The {βi} terms are determined from renormalization group equations without ambiguity. The correct behavior of the running coupling at each order and at each phase-space point can then be obtained. The PMC reduces in the Nc → 0 Abelian limit to the Gell-Mann-Low method. In this brief report, we summarize the results of our recent application of the PMC to a number of collider processes, emphasizing the generality and applicability of this approach. A discussion of hadronic Z decays shows that, by applying the PMC, one can achieve accurate predictions for the total and separate decay widths at each order without scale ambiguities. We also show that, if one employs the PMC to determine the top-quark pair forward-backward asymmetry at the next-to-next-to-leading order level, one obtains a comprehensive, self-consistent pQCD explanation for the Tevatron measurements of the asymmetry. This accounts for the ＂increasing-decreasing＂ behavior observed by the DO collaboration for increasing tt invariant mass. At lower energies, the angular d

关键词： QCD proper renormalization scale-setting PMC high-energy colliders

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Pioneer of prostate cancer: past, present and the future of FOXA1

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Protein & Cell 2021年第1期12卷 29-38页

作者： Mona Teng stanley Zhou Changmeng Cai Mathieu Lupien Housheng Hansen He Princess Margaret Cancer Centre University Health NetworkTorontoCanada Department of Medical Biophysics University of TorontoTorontoCanada Center for Personalized Cancer Therapy University of Massachusetts BostonBostonMA 02125USA Ontario Institute for Cancer Research TorontoONCanada

Prostate cancer is the most commonly diagnosed noncutaneous cancers in North American *** androgen deprivation has remained as the cornerstone of prostate cancer treatment,resistance ensues leading to lethal *** box A1(FOXA1)encodes a pioneer factor that induces open chromatin conformation to allow the binding of other transcription *** direct interactions with the Androgen Receptor(AR),FOXA1 helps to shape AR signaling that drives the growth and survival of normal prostate and prostate cancer ***1 also possesses an AR-independent role of regulating epithelial-to-mesenchymal transition(EMT).In prostate cancer,mutations converge onto the coding sequence and c/s-regulatory elements(CREs)of FOXA1,leading to functional *** addition,FOXA1 activity in prostate cancer can be modulated post-translationally through various mechanisms such as LSD1-mediated protein *** this review,we describe the latest discoveries related to the function and regulation of FOXA1 in prostate cancer,pointing to their relevance to guide future clinical interventions.

关键词： FOXA1 cancer alterations

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Adoption of technologies that enhance soil carbon sequestration in East Africa. What influence farmers' decision?

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International Soil and Water Conservation Research 2020年第1期8卷 90-101页

作者： stanley Karanja Ng'ang'a Dorcas Anyango Jalang'o Evan Hartunian Girvetz International Centre for Tropical Agriculture(CIAT) National Agricultural Research Laboratories-KawandaP.O.Box 6247KampalaUganda International Centre for Tropical Agriculture(CIAT) P.O.Box 823-00621NairobiKenya

The last two decades have seen a rise of interest in the adoption and diffusion of agricultural technologies aimed at improving the sustainability of agricultural lands among smallholder farmers in developing *** papers set out to understand factors that influence the adoption of technologies that enhance soil carbon sequestration among smallholder farmers,using secondary data recorded in the World Overview of Conservation Approaches and Technologies(WOCAT)database from 45 to 50 smallholders'farmers in selected places in Kenya and Ethiopia respectively.A Probit model was used to analyse whether socio-economic,institutional,off-farm income,technical know-how,farmers'percep-tions,and land use characteristics influences the adoption of technologies that enhance soil carbon *** results show that smallholder farmers that positively perceived net benefits of the soil carbon enhancing technologies were more likely to adopt such technologies that enhance soil carbon sequestration in both *** to off-farm income and land ownership with title deeds were also found to be positively associated with ***-farm income positively influences adoption among farmer with a moderate income(100-500US$per year)but not the rich(>500US$)*** to high level of skills and technical know-how required for implementing and maintaining a technology on the farm had a negative influence on *** shows that interventions,aimed at addressing specific factors such as inadequate skills and knowledge,change in perception among farmers,and off-farm income are likely to have the greatest impact in decisions relating to the adoption of the soil carbon enhancing practices among farmers in East Africa.

关键词： Factors Influencing The adoption Soil carbon Sequestration East Africa

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Effect of fiber orientation in uni-directional glass epoxy laminate using acoustic emission monitoring

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Acta Metallurgica Sinica(English Letters) 2011年第5期24卷 351-364页

作者： V.Arumugam S.Barath Kumar C.Santulli A.Joseph stanley Department of Aerospace Engineering Anna University Department of Chemical Engineering Materials and EnvironmentUniversità La Sapienza MIT Campus Anna University

Acoustic emission （AE） can be used for in situ structural health monitoring of the composite laminates. One of the main issues of AE is to characterize different damage mechanisms from the detected AE signals. In the present work, pure resin and GFRP composites laminates with different stacking sequences such as 0°, 90°, angle ply[±45°], cross-ply [0°/90°] are used to trigger different failure mechanisms when subjected to tensile test with AE monitoring. The study of failure mechanisms is facilitated by the choice of different oriented specimens in which one or two such mechanisms predominate. Range of peak frequencies in each orientation is investigated using FFT analysis. Fast Fourier Transform （FFT） enabled calculating the frequency content of each damage mechanism. Randomly selected hits from each range of peak frequencies for the specimens with different orientations subjected to tensile test with AE monitoring are analyzed using short time FFT （STFFT） analysis. STFFT analysis is used to highlight the possible failure mechanism associated with each signal. The predominance of failure modes in each orientation is useful in the study of discrimination of failure modes in composite laminates from AE data.

关键词： Composite materials Failure mechanisms Acoustic emissionFFT analysis STFFT analysis

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Antiproliferative effect of silver nanoparticles synthesized using amla on Hep2 cell line

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Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 1-10页

作者： Fathima stanley Rosarin Vadivel Arulmozhi Samuthira Nagarajan Sankaran Mirunalini Department of Biochemistry and Biotechnology Annamalai UniversityAnnamalai nagar-608 002TamilnaduIndia Department of Chemistry Annamalai UniversityAnnamalai nagar-608 002.TamilnaduIndia

Objective:To synthesize silver nanoparticles by amla extract,screen the cytotoxic,oxidative stress and apoptotic effect of silver nanoparticles（AgNPs） on Hep2 cell line（laryngeal carcinoma cells） in vitro,and to compare the effect of Phyllanthm emblica（***）（amla） with AgNPs synthesized by amla and ***:AgNPs was synthesized by ***（aqueous extract） and nanoparticles were characterized UV-Vis spec,the presence of biomoloecules of amla capped in AgNPs was found by FT-IR analysis,shape and size were examined by SEM and *** of experimental drugs was tested to find IC50 *** generation in cells have been measured by DCFH-DA ***-EtBr,Rhodamine-123 staining and DNA fragmentation were performed to assess apoptotic cell death,mitochondrial membrane potential and apoptotic DNA damage,*** stress was analyzed by measuring lipid peroxides and antioxidants level lo understand the cancer cell death by pro-oxidant mechanism. Results:PE-AgNPs was synthesized and confirmed through kinetic behavior of *** shape of PE-AgNPs was spherical and cubic since it was agglomerated,and the nanoparticle surface was *** particle size distribution of PE-AgNPs was found to be 188 *** biomolecules of *** such as polyphenols were capped with AgNPs and reduced its toxicity. In cytotoxicity assay the concentration in which the maximum number of cell death was 60μg/mL and 50μg/mL for ***（alone） and AgNPs,respectively and IC50 values were fixed as 30μg/mL and 20μg/*** generation,apoptotic morphological changes,mitochondrial *** damage and oxidative stress was observed as more in AgNPs treated cells than in ***（30μg/mL）（alone） treated cells and 5-FU treated cells gave similar result. Conclusions:The results suggest that the AgNPs are capped with biomolecules of amla enhanced cytotoxicity in laryngeal cancer cells through oxidative stress and apoptotic function

关键词： Amla AgNPs Oxidative stress Cytotoxicity Antiproliferation

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Hydrophilic and hydrophobic competition in water-methanol solutions

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Science China(Physics,Mechanics & Astronomy) 2019年第10期62卷 8-15页

作者： Domenico Mallamace Sow-Hsin Chen Carmelo Corsaro Enza Fazio Francesco Mallamace HEugene stanley Dipartimento MIFT Universita di MessinaMessina 1-98166Italy Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridge MA 02139USA Istituto dei Sistemi Complessi(ISC)-CNR Rome 00185Italy Center for Polymer Studies and Department of Physics Boston UniversityBoston MA 02215USA

We study the thermal behavior of the longitudinal spin-lattice, T1, and the transverse spin-spin, T2, relaxation times of the macroscopic magnetization in water/methanol solutions. Our aim is to investigate the reciprocal influence of hydrophobic effects on water properties and of hydrophilicity（via hydrogen bond, HB, interactions） on the solute. Using classical Nuclear Magnetic Resonance spectroscopy, we find a single characteristic correlation time τcthat reflects all local structural configurations and characterizes the thermal motion effects of the magnetic nuclei on the spin-spin interaction. We find that in the supercooled regime the correlations are stronger, with respect to ambient temperature, because the HB interactions have a lifetime long enough to sustain a stable water network. However, increasing the temperature, progressively decreases the HB interaction lifetime and destroys the water clusters with a consequent decoupling in the dynamic modes of the system. In addition, at temperatures higher than about 265 K, the hydrophobicity becomes gradually stronger and governs the physical properties of the solutions.

关键词： hydrophobic-hydrophilic interactions water systems thermal properties

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Paleoecological Response of Corals to the End-Triassic Mass Extinction： An Integrational Analysis

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Journal of Earth Science 2018年第4期29卷 879-885页

作者： George D stanley Jr Hannah M E Shepherd Autumn J Robinson University of Montana Paleontology Center Missoula MT 59812 USA

The end-Triassic （also Triassic-Jurassic） mass extinction severely affected life on planet Earth 200 million years ago. Paleoclimate change triggered by the volcanic eruptions of the Central Atlantic Magmatic Province （CAMP） caused a great loss of marine biodiversity, among which 96% coral genera were get lost. However, there is precious little detail on the paleoecology and growth forms lost between the latest Triassic extinction and the Early Jurassic recovery. Here a new pilot study was conducted by analyzing corallite integration levels among corals from the latest Triassic and Early Jurassic times. Integration levels in corals from the Late Triassic and Early Jurassic were determined through both the Paleobiology Database as well as from a comprehensive museum collection of fossil corals. Results suggest that in addition to a major loss of diversity following the end-Triassic mass extinction, there also was a significant loss of highly integrated corals as clearly evidenced by the coral data from the Early Jurassic. This confirms our hypothesis of paleoecological selectivity for corals following the end-Triassic mass extinction. This study highlights the importance of assigning sim- ple to advanced paleoecological characters with integration levels, which opens a useful approach to understanding of mass extinction and the dynamics of the recovery.

关键词： coral loss integration level end-Triassic mass extinction paleoecology

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Surface hydrolysis-mediated PEGylation of poly(N-isopropyl acrylamide)based nanogels

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Regenerative Biomaterials 2017年第5期4卷 281-287页

作者： Jonathan T.Peters stanley Verghese Deepak Subramanian Nicholas A.Peppas McKetta Department of Chemical Engineering The University of Texas at AustinAustinTXUSA Institute for Biomaterials Drug Deliveryand Regenerative MedicineThe University of Texas at AustinAustinTXUSA Department of Biomedical Engineering The University of Texas at AustinAustinTXUSA Department of Pediatrics and Department of Surgery and Perioperative CareDell Medical SchoolThe University of Texas at AustinAustinTXUSA Division of Pharmaceutics College of PharmacyThe University of Texas at AustinAustinTXUSA

In this work,poly(N-isopropyl acrylamide-co-acrylamide)[P(NIPAAm-co-AAm)]nanogels were modified by hydrolysis above the lower critical solution temperature(LCST)to localize carboxylic acid functional groups at the surface(surface hydrolysis).PNIPAAm copolymerized with 15%and 20%nominal AAm in the feed were prepared and compared to equivalent hydrogels with acrylic *** effect and extent of surface hydrolysis was confirmed by potentiometric titration and zeta *** surface modified nanogels were then modified with primary amine functionalized PEG *** hydrolysis-mediated PEGylation had little effect on the swelling response of the nanogels,while also preventing adsorption of model proteins in physiological relevant *** both 15%and 20%AAm gels both decreased protein adsorption,only the 20%AAm gels resulted in fully preventing protein *** results presented here point to surface hydrolysis as a new route to passivate nanogels for use in vivo.

关键词： PNIPMAAm hydrogels PEG passivation

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Relation between Early CT Signs and Ischaemic Core Size on DWI MR in Stroke Patients at the 2nd Affiliated Hospital of Dalian Medical University

Relation between Early CT Signs and Ischaemic Core Size on D...

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作者： George William stanley 大连医科大学

学位级别：硕士

背景与目的:在全球范围内,脑卒中是成年人致死的第三大死因,也是最常见的致残原因。因此,脑卒中给患者家庭、社会及政府带来了沉重的经济负担,并在世界大多数国家、尤其是发达国家的卫生预算中占据了很大一部分。脑卒中最常见的类型是... 详细信息

背景与目的:在全球范围内,脑卒中是成年人致死的第三大死因,也是最常见的致残原因。因此,脑卒中给患者家庭、社会及政府带来了沉重的经济负担,并在世界大多数国家、尤其是发达国家的卫生预算中占据了很大一部分。脑卒中最常见的类型是缺血性脑卒中,其中大脑中动脉(MCA)受累是最为严重的。阿尔伯塔脑卒中计划早期诊断项目评分(ASPECTS)是一个描述大脑中动脉(MCA)梗死区域梗死程度的一种具有可靠性、一致性和可重复性的半定量方法。缺血中心区面积为影像学最早测量到的脑实质不可逆缺血损伤的指标。本研究主要目的是使用回顾性地分析方法判断早期缺血性脑卒中ASPECTS法非对比增强CT征象(NCCT/NECT)和磁共振弥散加权成像(DWI)间的关系。非对比增强CT(或CT平扫)是急性脑卒中的首选检查方法,扫描方便,禁忌症少,同时较MRI检查更为廉价、快速。因此,非对比增强CT的ASPECTS评分法将有可能是判断脑卒中患者病变程度和预后的一种快速、可靠、全天候的工具。此外,DWI在大部分的三级医疗机构已经得到了广泛的应用。但是,在没有先进的影像设备和(或)后处理软件(如:灌注成像等)的地区,非对比增强CT的ASPECTS评分将有可能有助于脑卒中患者的治疗、护理方案的制定。方法:本次实验回顾性地研究了2015年大连医科大学附属第二医院内同时进行了非对比增强ct和磁共振弥散加权成像检查的缺血性脑卒中患者24例。实验对象为首次发病的mca供血区缺血性脑卒中(包括大脑半球卒中)患者,在发病的12小时内进行非对比ct评估(ncct)并在发病后1-5天内进行磁共振弥散加权成像(dwimri),随访过程中包括磁共振血管造影(mra)图像。患者的排除标准包括:出血性脑卒中、腔隙性梗死和持续性的血管狭窄或闭塞。24例患者进行非对比增强ct扫描和磁共振弥散加权成像检查,并分别对缺血中心区平均周长进行测量。以磁共振弥散加权成像中作为识别脑梗死区的影像学参考点与金标准。使用spss23.0统计学软件对患者年龄、非对比增强ct以及dwi的aspects评分、缺血中心平均周长、非对比增强ctaspects评分的敏感性、aspects评分≤7组与>7组之间梗死区周长、非对比增强ctaspects评分与dwi缺血灶周长的相关性进行统计学分析,p7组梗死中心周长间存在统计学差异;而在非对比增强CT ASPECTS评分与和DWI ASPECTS评分间不在统计学差异。在急性MCA梗死患者中非对比增强CT ASPECTS评分与DWI中缺血中心周长之间尚不能认为存在相关性,因此,非对比增强CT ASPECTS评分并不能替代缺血中心面积在判断梗死程度及预后中的作用。在以后的实验中,我们将采用更大的样本量,采用不同CT的扫描方位进行ASPECTS评分,在DWI对平均周长的测量中考虑扫描间距,并且进行前瞻性的设计。

关键词：脑卒中 ASPECTS指数大脑中动脉供应区域强化,非增强CT 弥散加权成像缺血核心区

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Survivorship, attained diameter, height and volume of three Paulownia species after 9 years in the southern Appalachians, USA

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Journal of Forestry Research 2020年第6期31卷 2181-2191页

作者： Erik C.Berg stanley J.Zarnoch W.Henry McNab University of Montana Bureau of Business and Economic ResearchMissoulaMT 59812USA USDA Forest Service Southern Research Station AshevilleNC 28806USA

Little is known of the tree and stand dynamics of varied species of planted Paulownia left unmanaged until harvest in the southeastern United *** sought to remedy this lack of information needed by land managers to make informed decisions by investigating diff erences in survivorship,attained diameter breast height(DBH),diameter at ground level,total height,tree volume and standlevel volume yields of planted ***,***,and *** in the cool-moist environment of the southern Appalachian *** 9 years,combined-species survivorship was only 27.3%.Low survivorship was likely related to several inclement weather *** was signifi cantly smaller in DBH and total *** combined-species stem(bole)volume models were developed as functions of(1)DBH squared,(2)the product DBH squared and total height,and(3)the product diameter ground line squared and total *** total volume production of unmanaged stands was greatest for *** and *** 4 years after planting;by the 9th year,total volume of *** was greater than the other two *** of our study provide managers information on productivity of three species of Paulownia that can be used for estimating plantation yields.

关键词： Diameter Tree height Stand structure Stem volume Paulownia

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