THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

正しい方法がわかる臨床基本手技 : from the New England journal of medicine

New generation adsorbents for water treatment.

Large-scale electrolysis of water for hydrogen generation requires better catalysts to lower the kinetic barriers associated with the oxygen evolution reaction (OER). Although most OER catalysts are based on crystalline mixed-metal oxides, high activities can also be achieved with amorphous phases. Methods for producing amorphous materials, however, are not typically amenable to mixed-metal compositions. We demonstrate that a low-temperature process, photochemical metal-organic deposition, can produce amorphous (mixed) metal oxide films for OER catalysis. The films contain a homogeneous distribution of metals with compositions that can be accurately controlled. The catalytic properties of amorphous iron oxide prepared with this technique are superior to those of hematite, whereas the catalytic properties of a-Fe100-y-zCoyNizOx are comparable to those of noble metal oxide catalysts currently used in commercial electrolyzers.

https://science.sciencemag.org/content/sci/early/2013/03/27/science.1233638.full.pdf

Photochemical Route for Accessing Amorphous Metal Oxide Materials for Water Oxidation Catalysis

Control of spontaneously emitted light lies at the heart of quantum optics. It is essential for diverse applications ranging from miniature lasers and light-emitting diodes, to single-photon sources for quantum information, and to solar energy harvesting. To explore such new quantum optics applications, a suitably tailored dielectric environment is required in which the vacuum fluctuations that control spontaneous emission can be manipulated. Photonic crystals provide such an environment: they strongly modify the vacuum fluctuations, causing the decay of emitted light to be accelerated or slowed down, to reveal unusual statistics, or to be completely inhibited in the ideal case of a photonic bandgap. Here we study spontaneous emission from semiconductor quantum dots embedded in inverse opal photonic crystals. We show that the spectral distribution and time-dependent decay of light emitted from excitons confined in the quantum dots are controlled by the host photonic crystal. Modified emission is observed over large frequency bandwidths of 10%, orders of magnitude larger than reported for resonant optical microcavities. Both inhibited and enhanced decay rates are observed depending on the optical emission frequency, and they are controlled by the crystals’ lattice parameter. Our experimental results provide a basis for all-solid-state dynamic control
of optical quantum systems.

Controlling the dynamics of spontaneous emission from quantum dots by photonic crystals

http://esatjournals.org/Volumes/IJRET/2014V03/I15/IJRET20140315092.pdf

Performance of nano crystalline h-zsm-5 as additive in fcc catalyst: (a review)

Structural, Optical and Magnetic Properties of Fe Doped Cr2O3 Nanoparticles

The effect of tin concentration on the photovoltaic properties of indium tin oxide (ITO)/p-InP junctions prepared at 340 degrees C by the spray pyrolysis technique has been reported. With increasing tin concentration (up to 25% by weight) in the ITO films, the illuminated output parameters of the junctions, Voc. Jsc and fill factor (FF) (and consequently the efficiency) are affected very little, but appreciable changes are observed in the diode ideality factor (n), reverse saturation current (J0) and spectral response. A maximum efficiency of 10.7% has been achieved under 100 mW cm-2 illumination for junctions (without antireflection coating and top grid contact) having 5% by weight of tin. An attempt has been made to understand the results qualitatively.

https://iopscience.iop.org/article/10.1088/0268-1242/8/3/024/pdf

Spray-pyrolytic-grown ITO/InP junctions: effect of tin doping

Metal-organic chemical vapor deposition (MOCVD) grown n-type Gallium nitride (GaN) has been irradiated with 100 MeV Ni 9+ ions at room temperature. Atomic force microscopy (AFM) images show the nano-clusters' formation upon irradiation and the irradiated GaN surface roughness increases with the increasing ion fluences. High-resolution X-ray diffraction (HR-XRD) analysis reveals the formation of Ga 2 O 3 due to the interface mixing of GaN/Al 2 O 3 upon irradiation. FWHM values of GaN (0 0 0 2) increases due to the lattice disorder. Photoluminescence studies show reduced band edge emission and yellow luminescence (YL) intensity with the increasing ion fluences. Change in the band gap energy between 3.38 and 3.04 eV was measured by UV-visible optical absorption spectrum on increasing the ion fluences.

Effect of 100 MeV Ni9+ ion irradiation on MOCVD grown n-GaN

We report a simple, eco-friendly facile wet chemical nitrate precursor route for the synthesis of pristine and nickel-containing nanocrystalline (∼44 nm) α-Fe2O3. Thermal analysis of the dried (∼70 °C) presumed oxalate powder, Fe2(C2O4)3 · 4H2O (also confirmed by X-ray diffraction), revealed two-step formation of the oxide; slower reaction as Fe2(C2O4)3 · 4H2O  4H2O + 2CO2 + 2FeC2O4 and faster as 2FeC2O4  Fe2O3 + CO2 + 3CO. The incorporation of nickel resulted in progressive increase of cell parameters and exhibited decrease in estimated direct and indirect band gap values. The direct band gap values were in close correlation with emission transitions. The direct nature and narrowing of band gap with nickel addition ensures the higher absorbance values and wider spectrum of absorbance; indicating the enhanced semiconducting properties for applications such as solar cells, photocatalytic activity, etc. Regarding magnetic properties, the saturation magnetization increased progressively with nickel content while coercivity reduced up to 2 wt% of Ni content and increased afterward. The resistivity values with nickel incorporation decreased, when substituted at Fe3+ sites.

Jitendra Kumar

Papers

Performance of nano crystalline h-zsm-5 as additive in fcc catalyst: (a review)

Structural, Optical and Magnetic Properties of Fe Doped Cr2O3 Nanoparticles

Spray-pyrolytic-grown ITO/InP junctions: effect of tin doping

Effect of 100 MeV Ni9+ ion irradiation on MOCVD grown n-GaN

Nickel-induced structural, optical, magnetic, and electrical behavior of α-Fe2O3