2,590 research outputs found
Programm des Grossherzoglich hessischen Gymnasiums zu Giessen, als Einladung zu den am 17. und 18. MĂ€rz 1893 stattfindenden öffentlichen PrĂŒfungen : beigegeben wird eine Abhandlung des Gymnasiallehrers Dr. Franz Schmitt: Der Unterricht in Quinta nach dem Konzentrationsprinzip. I. Sprachlich-grammatischer Teil
Da seit Ostern 1877 ein amtlicher Lehrplan fĂŒr die Landesgymnasien (Revidierte Ausgabe von 1884, Darmstadt, Buchhandlung Grossherzoglichen Staatsverlags) die Aufgaben und Ziele der einzelnen UnterrichtsgegenstĂ€nde fĂŒr die betr. Klassen festgestellt hat, so erscheinen nur diejenigen Angaben hier, welche nicht aus dem allgemeinen Lehrplan ersichtlich oder durch die SpeciallehrplĂ€ne des hiesigen Gymnasiums veranlasst sind. ..
Vinylene-Linked Covalent Organic Frameworks by Base-Catalyzed Aldol Condensation
Two 2D covalent organic frameworks (COFs) linked by vinylene (âCH=CHâ) groups (VâCOFâ1 and VâCOFâ2) are synthesized by exploiting the electron deficient nature of the aromatic sâtriazine unit of C3âsymmetric 2,4,6âtrimethylâsâtriazine (TMT). The acidic terminal methyl hydrogens of TMT can easily be abstracted by a base, resulting in a stabilized carbanion, which further undergoes aldol condensation with multitopic aryl aldehydes to be reticulated into extended crystalline frameworks (VâCOFs). Both VâCOFâ1 (with terepthalaldehyde (TA)) and VâCOFâ2 (with 1,3,5âtris(pâformylphenyl)benzene (TFPB)) are polycrystalline and exhibit permanent porosity and BET surface areas of 1341â
m2âgâ1 and 627â
m2âgâ1, respectively. Owing to the close proximity (3.52â
Ă
) of the preâorganized vinylene linkages within adjacent 2D layers stacked in eclipsed fashion, [2+2] photoâcycloadditon in VâCOFâ1 formed covalent crosslinks between the COF layers.TU Berlin, Open-Access-Mittel - 2019DFG, 390540038, EXC 2008: UniSysCa
The PSI np data and their effect on the charge coupling constant
Differential cross sections of elastic neutron-proton scattering have been measured for the energy range from 200 MeV to 580 MeV. The angular interval for the detection of the recoiling proton ranges up to 48 degree in the laboratory system. This corresponds to an interval of the scattering angle from 80 degree to 180 degree in the centre-of-mass system. For absolute normalization the simultaneously measured np --> d Pi^o reaction was used above 280 MeV. The charged Pi-NN coupling constant has been determined to f^2_{Pi-n-p} = 0.076+-0.001
The Family-Environment Connection: Filling a Nationwide Program Gap
Since its inception, Extension has focused on helping individuals, families, and communities change economic, environmental, and social conditions. Over the organization\u27s history, environmental condition change programming has been mostly the purview of natural resource educators and less often conducted by family and consumer science professionals. There is no evidence of a comprehensive approach to environmental education in Extension linked to family development. In addition, no evidence was found of any Extension educators conducting environmental education with the family unit as the audience. The Family-Environment Connection initiative created by Iowa State University Extension and Outreach aims to fill this gap
TDC Chip and Readout Driver Developments for COMPASS and LHC-Experiments
A new TDC-chip is under development for the COMPASS experiment at CERN. The
ASIC, which exploits the 0.6 micrometer CMOS sea-of-gate technology, will allow
high resolution time measurements with digitization of 75 ps, and an
unprecedented degree of flexibility accompanied by high rate capability and low
power consumption. Preliminary specifications of this new TDC chip are
presented.
Furthermore a FPGA based readout-driver and buffer-module as an interface
between the front-end of the COMPASS detector systems and an optical S-LINK is
in development. The same module serves also as remote fan-out for the COMPASS
trigger distribution and time synchronization system. This readout-driver
monitors the trigger and data flow to and from front-ends. In addition, a
specific data buffer structure and sophisticated data flow control is used to
pursue local pre-event building. At start-up the module controls all necessary
front-end initializations.Comment: 5 pages, 4 figure
Analysing powers for the reaction and for np elastic scattering from 270 to 570 MeV
The analysing power of the reaction for neutron energies between threshold and 570 MeV has been determined
using a transversely polarised neutron beam at PSI. The reaction has been
studied in a kinematically complete measurement using a time-of-flight
spectrometer with large acceptance. Analysing powers have been determined as a
function of the c.m. pion angle in different regions of the proton-proton
invariant mass. They are compared to other data from the reactions and . The np elastic scattering analysing power was determined as a
by-product of the measurements.Comment: 12 pages, 6 figures, subitted to EPJ-
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