710 research outputs found
A new development cycle of the Statistical Toolkit
The Statistical Toolkit is an open source system specialized in the
statistical comparison of distributions. It addresses requirements common to
different experimental domains, such as simulation validation (e.g. comparison
of experimental and simulated distributions), regression testing in the course
of the software development process, and detector performance monitoring.
Various sets of statistical tests have been added to the existing collection to
deal with the one sample problem (i.e. the comparison of a data distribution to
a function, including tests for normality, categorical analysis and the
estimate of randomness). Improved algorithms and software design contribute to
the robustness of the results. A simple user layer dealing with primitive data
types facilitates the use of the toolkit both in standalone analyses and in
large scale experiments.Comment: To be published in the Proc. of CHEP (Computing in High Energy
Physics) 201
Herwig++ 2.0 Release Note
A new release of the Monte Carlo program Herwig++ (version 2.0) is now
available. This is the first version of the program which can be used for
hadron-hadron physics and includes the full simulation of both initial- and
final-state QCD radiation.Comment: Source code and additional information available at
http://hepforge.cedar.ac.uk/herwig
Molecular Phylogentic Analysis of Marine Polychaeta and Crassostrea rivularis
底栖生物在海洋生态系统中起着极其重要的作用,部分底栖生物也是重要的海洋经济物种。同时因为海洋底栖动物活动性小、地区性强,可以较好地反映水质和地质的污染状况,在海洋污染生物学指标中具有特别重要的意义。因此对底栖生物进行正确的分类和系统发育学研究是十分必要的。过去对底栖生物的分类主要根据形态来划分,但是随着科学的发展传统形态学越来越遇到一些难以克服的障碍,如趋同进化的问题。另外用形态特征定义一个分类阶元,就必须对标本的完整性、性别、生长阶段有严格的要求,因此对于一些特殊条件下取得的很难保持完整的形态的标本来说,进行形态学的鉴定尤其困难。现代分子生物学的发展。使我们可以利用核酸、蛋白质等生物大分子的...Marine benthos play a very important role in the ecology of marine environment. Lots of the animals are also important economic marine species. Meanwhile, because they are characterized as narrow active and special territory distribution, they can be used to indicate the quality of water and the polluted condition of sediments, which is an important part of the biologic indication of marine pollut...学位:理学硕士院系专业:生命科学学院生物学系_生物化学与分子生物学学号:20012605
Medicare for all
OBJECTIVES: Interferon (IFN) alpha is a key immunoregulatory cytokine secreted by activated plasmacytoid dendritic cells (PDC) that constitute less than 1% of leucocytes. IFNalpha plays an important role in the pathogenesis of systemic lupus erythematosus (SLE). Nevertheless, the natural IFNalpha inducers in SLE as well as the different IFNalpha secreting cell types are only partially characterised. METHODS: Chromatin was purified from calf thymus. Human peripheral blood mononuclear cells (PBMC), neutrophils and mouse bone marrow neutrophils were purified and cultured with different stimuli. IFNalpha production was estimated by flow cytometry, ELISA and a bioassay, and gene expression by quantitative real time PCR. Neutrophil activation and NETosis were analysed by flow cytometry, ELISA and confocal microscopy. RESULTS: Neutrophils produced a bioactive IFNalpha on stimulation with purified chromatin. IFNalpha secretion was observed with steady state neutrophils purified from 56 independent healthy individuals and autoimmune patients in response to free chromatin and not chromatin containing immune complexes. Chromatin induced IFNalpha secretion occurred independently of Toll-like receptor 9 (TLR9). Neutrophil priming by granulocyte-colony stimulating factor, granulocyte macrophage-colony stimulating factor or IFNalpha was not necessary but PBMC sustained IFNalpha secretion by neutrophils. PDC were 27 times more efficient than neutrophils but blood neutrophils were 100 times more frequent than PDC. Finally, neutrophil activation by chromatin was associated with NETosis and DNA sensor upregulation. CONCLUSIONS: Neutrophils have the capability of producing IFNalpha on selective triggering, and we identified a natural lupus stimulus involved, unveiling a new mechanism involved in SLE. Neutrophils represent another important source of IFNalpha and important targets for future therapies aimed at influencing IFNalpha levels
Gel mobility shift scanning of pectin-inducible promoter from Penicillium griseoroseum reveals the involvement of a CCAAT element in the expression of a polygalacturonase gene
Previous reports have described pgg2, a polygalacturonase-encoding gene of Penicillium griseoroseum, as an attractive model for transcriptional regulation studies, due to its high expression throughout several in vitro growth conditions, even in the presence of non-inducing sugars such as sucrose. A search for regulatory motifs in the 5' upstream regulatory sequence of pgg2 identified a putative CCAAT box that could justify this expression profile. This element, located 270 bp upstream of the translational start codon, was tested as binding target for regulatory proteins. Analysis of a 170 bp promoter fragment by electrophoretic mobility shift assay (EMSA) with nuclear extracts prepared from mycelia grown in pectin-containing culture medium revealed a high mobility complex that was subsequently confirmed by analyzing it with a double-stranded oligonucleotide spanning the CCAAT motif. A substitution in the core sequence for GTAGG partially abolished the formation of specific complexes, showing the involvement of the CCAAT box in the regulation of the polygalacturonase gene studied
Design of an electronic voting system using A blockchain network
Design of a scalable electronic voting system, which, based on a
generic model designed for this application called voting cell, guarantees the
integrity of the information through the use of a private network Blockchain.
For the validation of the system, the implementation of a cell was carried out,
for which fifty voters and three voting options were enabled. The stored data
was intentionally modified to corroborate the error correction method used by
the block chain networks and thus ensure the integrity of the voting system
results
Heavy Flavours in Collider Experiments
Current issues in the studies of Heavy Flavours in colliders are described
with particular emphasis on experiments in which the UK is involved. Results on
charm production at HERA are examined and compared to those at the Tevatron. B
production rates at the Tevatron as well as the status of B lifetimes and
mixing in the LEP collaborations and at the Tevatron are highlighted. The
measurement of sin2beta from CDF is described as well as the most recent
results on top physics at the Tevatron
GeantV: Results from the prototype of concurrent vector particle transport simulation in HEP
Full detector simulation was among the largest CPU consumer in all CERN
experiment software stacks for the first two runs of the Large Hadron Collider
(LHC). In the early 2010's, the projections were that simulation demands would
scale linearly with luminosity increase, compensated only partially by an
increase of computing resources. The extension of fast simulation approaches to
more use cases, covering a larger fraction of the simulation budget, is only
part of the solution due to intrinsic precision limitations. The remainder
corresponds to speeding-up the simulation software by several factors, which is
out of reach using simple optimizations on the current code base. In this
context, the GeantV R&D project was launched, aiming to redesign the legacy
particle transport codes in order to make them benefit from fine-grained
parallelism features such as vectorization, but also from increased code and
data locality. This paper presents extensively the results and achievements of
this R&D, as well as the conclusions and lessons learnt from the beta
prototype.Comment: 34 pages, 26 figures, 24 table
CAP interacts with cytoskeletal proteins and regulates adhesion‐mediated ERK activation and motility
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102140/1/emboj7601406-sup-0001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102140/2/emboj7601406.pd
Offloading electromagnetic shower transport to GPUs
Making general particle transport simulation for high-energy physics (HEP)
single-instruction-multiple-thread (SIMT) friendly, to take advantage of
accelerator hardware, is an important alternative for boosting the throughput
of simulation applications. To date, this challenge is not yet resolved, due to
difficulties in mapping the complexity of Geant4 components and workflow to the
massive parallelism features exposed by graphics processing units (GPU). The
AdePT project is one of the R\&D initiatives tackling this limitation and
exploring GPUs as potential accelerators for offloading some part of the CPU
simulation workload. Our main target is to implement a complete electromagnetic
shower demonstrator working on the GPU. The project is the first to create a
full prototype of a realistic electron, positron, and gamma electromagnetic
shower simulation on GPU, implemented as either a standalone application or as
an extension of the standard Geant4 CPU workflow. Our prototype currently
provides a platform to explore many optimisations and different approaches. We
present the most recent results and initial conclusions of our work, using both
a standalone GPU performance analysis and a first implementation of a hybrid
workflow based on Geant4 on the CPU and AdePT on the GPU.Comment: 8 pages, 4 figures, 20th International Workshop on Advanced Computing
and Analysis Techniques in Physics Research (ACAT 2021), to be published in
Journal of Physics: Conference Series, editor Andrei Gheat
- …