نتایج جستجو برای: GPR

تعداد نتایج: 2556  

Journal: :فیزیک زمین و فضا 0
ابوالقاسم کامکار روحانی دانشیار، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران اسماعیل اسحقی دانش آموخته ژئوفیزیک، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران علیرضا عرب امیری استادیار، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران

ground penetrating radar (gpr) method as a high resolution non-destructive geophysical method is used for detection of shallow subsurface targets. this method is based on the transmission of electromagnetic waves inside the earth and recording the reflected waves from the subsurface. as the method uses high-frequency electromagnetic waves in the frequency ranges of 12.5 to 2500 mhz (called gpr ...

Journal: :Journal of bacteriology 1992
J L Sanchez-Salas M L Santiago-Lara B Setlow M D Sussman P Setlow

During germination of spores of Bacillus species the degradation of the spore's pool of small, acid-soluble proteins (SASP) is initiated by a protease termed GPR, the product of the gpr gene. Bacillus megaterium and B. subtilis mutants with an inactivated gpr gene grew, sporulated, and triggered spore germination as did gpr+ strains. However, SASP degradation was very slow during germination of...

Journal: :The Journal of Experimental Medicine 1999
Brian A. Zabel William W. Agace James J. Campbell Heidi M. Heath David Parent Arthur I. Roberts Ellen C. Ebert Nasim Kassam Shixin Qin Maria Zovko Gregory J. LaRosa Li-Li Yang Dulce Soler Eugene C. Butcher Paul D. Ponath Christina M. Parker David P. Andrew

TECK (thymus-expressed chemokine), a recently described CC chemokine expressed in thymus and small intestine, was found to mediate chemotaxis of human G protein-coupled receptor GPR-9-6/L1.2 transfectants. This activity was blocked by anti-GPR-9-6 monoclonal antibody (mAb) 3C3. GPR-9-6 is expressed on a subset of memory alpha4beta7(high) intestinal trafficking CD4 and CD8 lymphocytes. In additi...

ژورنال: :پژوهه باستان سنجی 0
افسانه احمدپور afsaneh ahmadpour shahrood university tecnoalogyدانشگاه صنعتی شاهرود ابوالقاسم کامکار روحانی abolghasem kamkar rouhani shahrood university tecnoalogyدانشگاه صنعتی شاهرود رضا احمدی reza ahmadi arak university tecnoalogyدانشگاه صنعتی اراک

روش رادار نفوذی به زمین (gpr) یک روش ژئوفیزیکی غیر مخرب است که قادر به آشکارسازی انواع ناهمگنی های زیرسطحی و نیز شناسایی انواع اهداف مدفون در اعماق کم است. در پژوهش حاضر مدل سازی پیشرو و وارون داده های gpr با هدف کاربرد در زمینه باستان شناسی، انجام شده است. منطقه مورد مطالعه، منطقه باستانی تپه حصار دامغان است که در این منطقه با هدف بررسی های باستان شناسی زیرسطحی، تعدادی پروفیل gpr با استفاده از...

Journal: :Development 2011
Adam D Werts Minna Roh-Johnson Bob Goldstein

Cell divisions are sometimes oriented by extrinsic signals, by mechanisms that are poorly understood. Proteins containing TPR and GoLoco-domains (C. elegans GPR-1/2, Drosophila Pins, vertebrate LGN and AGS3) are candidates for mediating mitotic spindle orientation by extrinsic signals, but the mechanisms by which TPR-GoLoco proteins may localize in response to extrinsic cues are not well define...

Journal: :Cytoskeleton 2012
Henrik Bringmann

Cytokinesis and spindle positioning require the cortical force regulator G Protein Regulator 1/2 (GPR-1/2). GPR-1/2 is thought to localize to sites of cortical force generation. Does GPR-1/2 also act as a sensor for mechanical stimulation? I mechanically stimulated the cortex by indenting it with a glass needle and observed the cortical localization of a YFP::GPR-1 transgene. I found that corti...

2017
K. Rajiv Ramesh Chandra

The shape and feature extraction in Ground Penetrating Radar (GPR) data is the most addressed application in present underground object identification technique. The problem of automatically detecting the shape and feature in GPR data is in analysing and fitting the hyperbola features from GPR data objects. To address these, we propose a hyperbole fitting method to extract the shape and feature...

2017
E E Jafarov A D Parsekian K Schaefer L Liu A C Chen S K Panda T Zhang

Ground penetrating radar (GPR) has emerged as an effective tool for estimating active layer thickness (ALT) and volumetric water content (VWC) within the active layer. In August 2013, we conducted a series of GPR and probing surveys using a 500 MHz antenna and metallic probe around Barrow, Alaska. We collected about 15 km of GPR data and 1.5 km of probing data. Here, we describe the GPR data pr...

2018
Jordan M. Malof Daniel Reichman Andrew Karem Hichem Frigui Dominic K. C. Ho Joseph N. Wilson Wen-Hsiung Lee William Cummings Leslie M. Collins

In this paper we consider the development of algorithms for the automatic detection of buried threats using ground penetrating radar (GPR) measurements. GPR is one of the most studied and successful modalities for automatic buried threat detection (BTD), and a large variety of BTD algorithms have been proposed for it. Despite this, large-scale comparisons of GPR-based BTD algorithms are rare in...

Journal: :Remote Sensing 2015
Khan Zaib Jadoon Lutz Weihermüller Matthew F. McCabe Davood Moghadas Harry Vereecken Sébastien Lambot

We tested an off-ground ground-penetrating radar (GPR) system at a fixed location over a bare agricultural field to monitor the soil freeze-thaw cycles over a snow-covered surface. The GPR system consisted of a monostatic horn antenna combined with a vector network analyzer, providing an ultra-wideband stepped-frequency continuous-wave radar. An antenna calibration experiment was performed to f...

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