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

Electronic structure of cobalt and nitrogen co-doped zinc oxide magnetic system was investigated by means of density functional theory calculations. The changes in the magnetic moment for different combinations of cobalt occupancy and their bonding with nitrogen are determined.

First-principles calculations of ferromagnetism in ZnO co-doped with cobalt and nitrogen

Ultraviolet radiation is causative of generation of reactive oxygen species (ROS) in the body that significantly affects normal physiology and disturbs homeostasis. In the present study we investigated the effect of UV-A radiation exposure on the first line of defence system such as skin and vital organs such as liver, kidney and spleen of Rattus norvegicus . Adult female rats were exposed to UV-A radiation for seven days at a dose of 6.36 J/cm 2 and the changes in the skin histoarchitecture, oxidative load of spleen, liver and kidney along with cellular ROS levels of splenocyte determined using DCFDA staining were recorded. UV-A exposure severely damaged the histoarchitecture of skin and reduced proliferating cell nuclear antigen (PCNA) expression. The lipid peroxidation (MDA) level in spleen, liver and kidney were increased to significant levels while the activities of the enzymatic antioxidants, SOD and catalase were significantly decreased. Significant decrease of glucose content and increase of LDH of both spleen and liver were found. Cellular damage of splenocyte was observed as evidenced by increase in percentage of intense DCFDA-stained cells in UV-A treated rats. Thus, our results clearly demonstrate that UV-A radiation exposure may have detrimental effects on the antioxidant defence system of the body, including melatonin, leading to disruption of physiology by affecting vital organs.

Ultraviolet A (UV-A) Radiation-Induced Damage in the Skin and Vital Organs of Albino Rat: An Indirect Correlation with Melatonin

In the current study, we investigated a specific model of anisotropic strange stars specially Her X-1, in the background of modified f (R,T ) gravity by choosing f (R,T ) = R+ 2ξ T , where R is Ricci scalar, T is the trace of the energymomentum tensor and ξ is a coupling constant. To obtained the solution for the modified field equations, we apply Buchdahl metric to our equations. We consider the case, when the matter is governed by MIT bag model equation of state as Pr = 3 (ρ−4B), where B is bag constant. We calculate the values of unknown parameters using Schwarzschild interior space-time followed by choosing the appropriate values of parameter ξ , K, β and also tabulated different values of bag constant for different ξ . We examine the physical validity of our model by performing tests such as energy conditions, equilibrium of the forces, the adiabatic index, redshift and some more. The observational results showed that the proposed f (R,T ) model satisfies all these tests and are quite acceptable.

A study of anisotropic compact star with MIT bag EoS in f(R,T) modified theory

The effect of temperature on the characteristics of a quantum cascade detector (QCD) has been analyzed theoretically using a rate equation model. All the scattering rates are incorporated in the rate equation model and the effect of interface roughness scattering has been examined.

Effect of interface roughness scattering and temperature on quantum cascade detectors

Stability for 16 parents and their 56 crosses in bread wheat (Triticum aestivum L.) was studied under three different envitoments. Linear component of interaction and linear component of environment was significant for seed hardness, 100 grain weight, protein content, tryptophan content and grain yield. The linearly was predominated for protein content, tryptophan content, seed hardness, 100 grain weight and grain yield. The variation due to pooled deviation (non linear) was highly significant for all the traits except seed hardness and 100 grain weight indicating the substantial amount of genetic diversity in the present material. The large variation in regression coefficient in the present study revealed that parent varieties and their crosses had different degree of environmental responses. Among the genotypes K7618, K7402 and K7410 were highly adapted as they exhibited non-significant deviation from regression, regression coefficient less than unity and high mean value for grain yield. K7410 showed adaptation for for seed hardness. protein content and tryptophan content. Crosess K7229/K7503, K7229/K7410, K7229/K7402, IWP72/K7503 and IWP72/K7410 involving high x high adoptive cultivars showed high adaptation for high yield and average in other traits including quality. Other crosses L7618/K7503. L7827/K7410, WL410/K7503, WL410/K7402 and K65/K7402 comprising high x low cultivars for grain yield and given substantial degree of suitable performance.

Jitendra Kumar

Papers

First-principles calculations of ferromagnetism in ZnO co-doped with cobalt and nitrogen

Ultraviolet A (UV-A) Radiation-Induced Damage in the Skin and Vital Organs of Albino Rat: An Indirect Correlation with Melatonin

A study of anisotropic compact star with MIT bag EoS in f(R,T) modified theory

Effect of interface roughness scattering and temperature on quantum cascade detectors

Studies On Stability Parameters for Grain Yield and Quality Contributing Traits in Bread Wheat