نتایج جستجو برای: cold bulge forming

تعداد نتایج: 222071  

2001
Julio F. Navarro

Numerical simulations have revealed the presence of long-lived substructure in Cold Dark Matter (CDM) halos. These surviving cores of past merger and accretion events vastly outnumber the known satellites of the Milky Way. This finding has prompted suggestions that substructure in cold dark matter (CDM) halos may be incompatible with observation and in conflict with the presence of thin, dynami...

2006
J. Harju L. K. Haikala K. Lehtinen M. Juvela K. Mattila O. Miettinen M. Dumke R. Güsten L. - Å. Nyman

Aims. The purpose of this study is to examine the prediction that the deuterated H + 3 ion, H 2 D + , can be found exclusively in the coldest regions of molecular cloud cores. This is also a feasibility study for the detection of the ground-state line of ortho-H 2 D + at 372 GHz with APEX. Methods. The (1 10 → 1 11) transition of H 2 D + at 372 GHz was searched towards selected positions in the...

Journal: :International journal of manufacturing, materials, and mechanical engineering 2022

Finite Element (FE) simulation of sheet/tube forming precision depends mainly on the accuracy constitutive modeling. The present paper aim is to compare models fit stress-strain curves. accurate deformation behavior SS 304 tubes modeling hardening behavior. Deformation data tensile specimens cut from tubular sample were collected by conducting Uniaxial tests (UTT) at three different rolling dir...

2004
Takashi Okamoto Masahiro Nagashima

We investigate environmental effects on evolution of bright cluster galaxies in a Λdominated cold dark matter universe using a combination of dissipationless N-body simulations and a semi-analytic galaxy formation model. We incorporate effects of ram-pressure stripping (RPS) and minor merger-induced small starburst (minor burst) into our model. By considering minor burst, observed morphology-ra...

2014
Lixiao Wang Gang Fang Lingyun Qian Sander Leeflang Jurek Duszczyk Jie Zhou

Magnesium alloys have, in recent years, been recognized as highly promising biodegradable materials, especially for vascular stent applications. Forming of magnesium alloys into high-precision thin-wall tubes has however presented a technological barrier in the fabrication of vascular stents, because of the poor workability of magnesium at room temperature. In the present study, the forming pro...

2009
Kristen L. Shapiro Reinhard Genzel Nicolas Bouché Giovanni Cresci Ric Davies Frank Eisenhauer Natascha Förster Erin Hicks Dieter Lutz Linda Tacconi

In these proceedings, we summarize recent results from our “SINS” VLT/SINFONI integral-field survey, focusing on the 52 detected UV/opticallyselected star-forming galaxies at z ∼ 2. Our Hα emission-line imaging and kinematic data of these systems illustrates that a substantial fraction (≥ 1/3) of these galaxies are large, rotating disks and that these disks are clumpy, thick, and forming stars ...

Journal: :Buildings 2023

To study the cold-forming effect on yield strength distribution of cold-formed thick-walled steel, material tensile tests and axial compression were conducted steel-lipped channels. undertake tests, five types lipped channel sections with varied thicknesses nominal strengths selected. The test samples taken from web, flange, curled edge, corner sections, respectively. Next, a corresponding mode...

Journal: :Development 2006
Joanne G W Nijhof Kristin M Braun Adam Giangreco Carina van Pelt Hiroshi Kawamoto Richard L Boyd Rein Willemze Leon H F Mullenders Fiona M Watt Frank R de Gruijl Willem van Ewijk

We describe a novel murine progenitor cell population localised to a previously uncharacterised region between sebaceous glands and the hair follicle bulge, defined by its reactivity to the thymic epithelial progenitor cell marker MTS24. MTS24 labels a membrane-bound antigen present during the early stages of hair follicle development and in adult mice. MTS24 co-localises with expression of alp...

1994
M. Steinmetz

We present first results concerning the metallicities and stellar populations of galaxies formed in a cosmologically motivated simulation. The calculations include dark matter, gas dynamics, radiation processes, star formation, supernovae feedback, and metal enrichment. A rotating, overdense sphere with a mass of 8 1011 M serves as initial model. Converging and Jeans unstable regions are allowe...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Giuseppe D Tocchini-Valentini Paolo Fruscoloni Glauco P Tocchini-Valentini

Computational studies predict the simultaneous presence of two and even three introns in certain crenarchaeal tRNA genes. In these multiple-intron-containing pretRNAs, the introns are nested one inside the other and the pretRNA folds into a conformation that is anticipated to allow splicing of the last intron only after splicing the others. A set of operations, each consisting of two cleavages ...

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