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

Optical phonons in pentanary compound (AgxCu1−x)2ZnSnS4 semiconductor: A raman study

Study of oxidation of Ytterbium and Holmium thin films in the electron microscope

A full potential linear augmented plane wave method within the density functional theory is used to calculate the electronic and optical properties of layered compounds of LaCuOCh (Ch=S, Se, Te) and their alloys LaCuOCh0.5Ch0.5′(Ch, Ch′=S, Se, Te). These compounds are found to be direct band gap semiconductors and may have a high p-type electrical conductivity, which can be tuned by proper alloying. The dielectric functions and optical constants—refractive index, absorption coefficient, and real part of optical conductivity of these materials—are calculated. The present study shows by changing the chalcogenides in the alternate covalent Cu–Ch layers that one can control the electrical conductivity and optical emission in these oxychalcogenide semiconductors.

Electronic and optical properties of mixed anion layered oxychalcogenide semiconductors: An ab initio study

Medicinal plants are being used as traditional medicines to cure several infectious and non-infectious diseases because of their products are safe in contrast to the synthetic medicines that are considered as unsafe to human including other animals and environment. We selected Solanum nigrum L. (Makoi) which belongs to family Solanaceae to evaluate antimicrobial activities against six pathogenic bacteria Staphylococcus aureus, Bacillus cereus, Escherichia coli, Salmonella typhimurium, Pseudomonas aeroginosa and Enterobacter aerogens. Phytochemical analysis of the plant (crude extract of leaves, fruits and stems) showed the presence saponins, tannins, alkaloids, terpenoides, flavonoides and steroids etc. The extract of leaves, fruits and stemsprepared using five different solvents (hexane, chloroform, acetone, ethanol and water) showed antimicrobial activates against all selected pathogenic bacteria. But water extract of leaves, acetone extract of fruits and hexane extract of stems showed maximum zone of inhibition such as21.30±1.50, 16.67±0.58 and 14.30±1.52 respectively against Pseudomonas aeroginosa. Thus, we can say that S. nigrum possess broad spectrum antimicrobial activities against several pathogenic bacteria and can be used clinically to find novel antibacterial compounds for various diseases.

https://www.imedpub.com/articles/studies-on-phytochemical-constituents-and-antimicrobial-activities-of-leavesfruits-and-stems-of-solanum-nigrum-l.pdf

Studies on phytochemical constituents and antimicrobial activities of leaves,fruits and stems of Solanum nigrum L

Sucrose at 2 and 4% concentrations had significant effect on vase life of tuberose cv. Pearl Double cut spikes. Sucrose and GA3 influenced water uptake, vase life, fresh weight and floret opening. Non significant effect was observed on floret diameter and length due to all treatments. Over all observations suggest an increase in vase life with sucrose and plant growth regulator treatments.

Jitendra Kumar

Papers

Optical phonons in pentanary compound (AgxCu1−x)2ZnSnS4 semiconductor: A raman study

Study of oxidation of Ytterbium and Holmium thin films in the electron microscope

Electronic and optical properties of mixed anion layered oxychalcogenide semiconductors: An ab initio study

Studies on phytochemical constituents and antimicrobial activities of leaves,fruits and stems of Solanum nigrum L

Postharvest Life of Tuberose Cultivar Pearl Double Spike as Affected by GA3, NAA and Sucrose