نتایج جستجو برای: شکل دهنده پرتو gsc

تعداد نتایج: 106376  

Journal: :Development 2005
Shinsuke Tada Takumi Era Chikara Furusawa Hidetoshi Sakurai Satomi Nishikawa Masaki Kinoshita Kazuki Nakao Tsutomu Chiba Shin-Ichi Nishikawa

Bipotent mesendoderm that can give rise to both endoderm and mesoderm is an established entity from C. elegans to zebrafish. Although previous studies in mouse embryo indicated the presence of bi-potent mesendoderm cells in the organizer region, characterization of mesendoderm and its differentiation processes are still unclear. As bi-potent mesendoderm is implicated as the major precursor of d...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده مهندسی برق و کامپیوتر 1393

سونار در واقع راداری است که کارایی آن در آب بوده و در آن به جای امواج رادیویی از امواج صوتی جهت پویش محیط استفاده می¬گردد. امواج رادیویی در فضای سطحی به خوبی و با سرعت بالایی منتشر می¬گردد لیکن امواج صوتی به سرعت انرژی خود را از دست داده و تا برد کمی منتشر می¬گردد. اما در آب چنین نیست. ویژگی¬های ذاتی موج صوتی باعث می¬شود صوت بتواند تا کیلومترها منتشر گردد این در حالی¬ست که محیط زیر آب برای اکثر...

Journal: :IEEE Access 2023

This paper focuses on the power grid oscillation of grid-side converter (GSC) in doubly-fed induction generator (DFIG) caused by sub-synchronous (SSO), and designs a measure to improve output quality GSC. Firstly, influence mechanism multipath disturbance GSC under SSO is sorted out, factors action modes are clarified. Secondly, estimation phase-locked loop (PLL) control strategy calculation pr...

2016
Esen Yonca Bassoy Valentina Chiusolo Guillaume Jacquemin Cristina Riccadonna Paul R. Walker Denis Martinvalet

Glioblastoma multiforme, the most aggressive primary brain tumor, is maintained by a subpopulation of glioma cells with self-renewal properties that are able to recapitulate the entire tumor even after surgical resection or chemo-radiotherapy. This typifies the vast heterogeneity of this tumor with the two extremes represented on one end by the glioma stemlike cells (GSC) and on the other by th...

Journal: :Proceedings. Biological sciences 2016
Sarah Barfield Galina V Aglyamova Mikhail V Matz

The ability to segregate a committed germ stem cell (GSC) lineage distinct from somatic cell lineages is a characteristic of bilaterian Metazoans. However, the occurrence of GSC lineage specification in basally branching Metazoan phyla, such as Cnidaria, is uncertain. Without an independently segregated GSC lineage, germ cells and their precursors must be specified throughout adulthood from con...

Journal: :Development 2007
Nicholas Bogard Lan Lan Jiang Xu Robert S Cohen

All stem cells have the ability to balance their production of self-renewing and differentiating daughter cells. The germline stem cells (GSCs) of the Drosophila ovary maintain such balance through physical attachment to anterior niche cap cells and stereotypic cell division, whereby only one daughter remains attached to the niche. GSCs are attached to cap cells via adherens junctions, which al...

2016
Stefan Grossauer Katharina Koeck Claudia Petritsch

Glioma stem cells (GSC) are postulated to provide a reservoir of cells with selfrenewal capabilities, sustain tumor growth by generating differentiated nonstem tumor cells and may be responsible for recurrences after chemo-, radioand surgical therapy. Elimination of the GSC population is regarded as a key to successful treatment of glioma, but high resistance of GSC to conventional glioma thera...

2016
Jiake Li Xiaodong Chen Yi Wang Wei Li Daoyin Yu

The use of a generalized sidelobe canceler (GSC) can significantly improve the lateral resolution of medical ultrasound systems, but the contrast improvement isn't satisfactory. Thus a new Eigenspace-based generalized sidelobe canceler (EBGSC) approach is proposed for medical ultrasound imaging, which can improve both the lateral resolution and contrast of the system. The weight vector of the E...

2011
Prasanta Kumar Ghosh Shrikanth S. Narayanan

The movements of the different speech articulators are known to be correlated to various degrees during speech production. In this paper, we investigate whether the inter-articulator correlation is preserved among the articulators estimated through acoustic-toarticulatory inversion using the generalized smoothness criterion (GSC). GSC estimates each articulator separately without explicitly usi...

2014
Jian-wu Tao Wen-xiu Chang

We investigate the problem of quaternion beamforming based on widely linear processing. First, a quaternion model of linear symmetric array with two-component electromagnetic (EM) vector sensors is presented. Based on array's quaternion model, we propose the general expression of a quaternion semiwidely linear (QSWL) beamformer. Unlike the complex widely linear beamformer, the QSWL beamformer i...

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