نتایج جستجو برای: information sheet
تعداد نتایج: 1189783 فیلتر نتایج به سال:
This paper presents an end-to-end approach to automate the design and fabrication process for self-folding origami structures. Self-folding origami structures by uniform heat are robotic sheets composed of rigid tiles and joint actuators. When they are exposed to heat, each joint folds into a preprogrammed angle. Those folding motions transform themselves into a structure, which can be used as ...
The full history of ice sheet and climate interactions is recorded in the vertical profiles of geochemical tracers in polar ice sheets. Numerical simulations of these archives promise great advances both in the interpretation of these reconstructions and the validation of the models themselves. However, fundamental mathematical shortcomings of existing models subject tracers to spurious diffusi...
For ̄ exible manufacture of a doubly curved sheet metal, a new sheet metal forming process is proposed that uses a movable punch set composed of two pairs of lower support punches and one upper centre punch. The process is characterized by ̄ exibility compared with the existing conventional processes because it does not require any complex-shaped die and the loss of material is minimized by unc...
The serpinopathies are a group of inherited disorders that share as their molecular basis the misfolding and polymerization of serpins, an important class of protease inhibitors. Depending on the identity of the serpin, conditions arising from polymerization include emphysema, thrombosis, and dementia. The structure of serpin polymers is thus of considerable medical interest. Wild-type alpha(1)...
We assessed the feasibility of transplanting a sheet of retinal pigment epithelial (RPE) cells differentiated from induced pluripotent stem cells (iPSCs) in a patient with neovascular age-related macular degeneration. The iPSCs were generated from skin fibroblasts obtained from two patients with advanced neovascular age-related macular degeneration and were differentiated into RPE cells. The RP...
This study was undertaken with the purpose of ascertaining to what extent the eighth grade pupils of 1912 in the Washington Public Schools had repeated grades in their progress through the schools, in which grades the repeating occurred, and what the causes of the repeating were. By means of printed blanks, Dr. William M. Davidson, the superintendent of public schools, collected the data for th...
Consider two ordinary, seemingly identical plain paper shredders labeled A and B. When each of the two shredders is fed a blank sheet of paper, the resulting remnants are sufficiently similar that they are indistinguishable upon visual inspection. Now suppose that one of the shredders has been modified to introduce imperceptible variations in the size of each remnant it cuts. One of the shredde...
Using a new approach to force an ice sheet model, we performed an ensemble of simulations of the Greenland Ice Sheet evolution during the last two glacial cycles, with emphasis on the Eemian Interglacial. This ensemble was generated by perturbing four key parameters in the coupled regional climate-ice sheet model and by introducing additional uncertainty in the prescribed “background” climate c...
Because of the need for weight reduction in transport industry, in order to save energy as well as to reduce CO2-emission, the use of light weight aluminium sheet is taken increasingly into consideration [1]. But although aluminium is lighter than steel, the formability is less, hence press operations are often more critical. Alloys used are typically 5xxx alloys for inner panels because of the...
Jürgen Kompenhans, MEMBER SPIE Deutsche Forschungsanstalt für Luftund Raumfahrt Institut für Strömungsmechanik Center for Quantitative Visualisation BunsenstraXe 10 D-37073 Göttingen, Germany Abstract. In its classical form particle image velocimetry (PIV) extracts two components of the flow velocity vector by measuring the displacement of tracer particles within a double-pulsed laser light she...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید