Nonsubjective priors via predictive relative entropy regret

We explore the construction of nonsubjective prior distributions in Bayesian statistics via a posterior predictive relative entropy regret criterion. We carry out a minimax analysis based on a derived asymptotic predictive loss function and show that this approach to prior construction has a number of attractive features. The approach here differs from previous work that uses either prior or posterior relative entropy regret in that we consider predictive performance in relation to alternative nondegenerate prior distributions. The theory is illustrated with an analysis of some specific examples.Comment: Published at http://dx.doi.org/10.1214/009053605000000804 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org

Analytical detection of stationary and dynamic patterns in a prey-predator model with reproductive Allee effect in prey growth

Allee effect in population dynamics has a major impact in suppressing the paradox of enrichment through global bifurcation, and it can generate highly complex dynamics. The influence of the reproductive Allee effect, incorporated in the prey's growth rate of a prey-predator model with Beddington-DeAngelis functional response, is investigated here. Preliminary local and global bifurcations are identified of the temporal model. Existence and non-existence of heterogeneous steady-state solutions of the spatio-temporal system are established for suitable ranges of parameter values. The spatio-temporal model satisfies Turing instability conditions, but numerical investigation reveals that the heterogeneous patterns corresponding to unstable Turing eigen modes acts as a transitory pattern. Inclusion of the reproductive Allee effect in the prey population has a destabilising effect on the coexistence equilibrium. For a range of parameter values, various branches of stationary solutions including mode-dependent Turing solutions and localized pattern solutions are identified using numerical bifurcation technique. The model is also capable to produce some complex dynamic patterns such as travelling wave, moving pulse solution, and spatio-temporal chaos for certain range of parameters and diffusivity along with appropriate choice of initial conditions Judicious choices of parametrization for the Beddington-DeAngelis functional response help us to infer about the resulting patterns for similar prey-predator models with Holling type-II functional response and ratio-dependent functional response

Indian Monuments Classification using Support Vector Machine

Recently, Content-Based Image Retrieval is a widely popular and efficient searching and indexing approach used by knowledge seekers. Use of images by e-commerce sites, by product and by service industries is not new nowadays. Travel and tourism are the largest service industries in India. Every year people visit tourist places and upload pictures of their visit on social networking sites or share via the mobile device with friends and relatives. Classification of the monuments is helpful to hoteliers for the development of a new hotel with state of the art amenities, to travel service providers, to restaurant owners, to government agencies for security, etc.. The proposed system had extracted features and classified the Indian monuments visited by the tourists based on the linear Support Vector Machine (SVM). The proposed system was divided into 3 main phases: preprocessing, feature vector creation and classification. The extracted features are based on Local Binary Pattern, Histogram, Co-occurrence Matrix and Canny Edge Detection methods.  Once the feature vector had been constructed, classification was   performed using Linear SVM. The Database of 10 popular Indian monuments was generated with 50 images for each class. The proposed system is implemented in MATLAB and achieves very high accuracy. The proposed system was also tested on other popular benchmark databases

Memory in nanomagnetic systems: Superparamagnetism versus Spinglass behavior

The slow dynamics and concomitant memory (aging) effects seen in nanomagnetic systems are analyzed on the basis of two separate paradigms : superparamagnets and spinglasses. It is argued that in a large class of aging phenomena it suffices to invoke superparamagnetic relaxation of individual single domain particles but with a distribution of their sizes. Cases in which interactions and randomness are important in view of distinctive experimental signatures, are also discussed.Comment: 11 pages and 19 figure

Spectrum of endometrial lesions observed on histopathological examination of endometrial samples in women with abnormal uterine bleeding

Background: Abnormal uterine bleeding is one of the common gynecological complaints of women of all age groups. Histopathological study of endometrial biopsy and curettage samples is an effective diagnostic modality that can be used to identify cause of AUB at its earliest. This study was done to investigate the various endometrial causes of AUB that frequently come to our hospital and their incidence in various age groups i.e. reproductive, perimenopausal and postmenopausal.Methods: This study was conducted on 108 patients who clinically presented with AUB and had their endometrial biopsy and curettage specimens sent to the histopathology department of our tertiary care hospital and teaching centre, located in Uttar Pradesh from June 2018 to May 2019. The endometrial patterns were observed, and their frequencies and percentages were computed and classified age group wise.Results: These studies included patients with age range from 19 to 77 years. The predominant age group with AUB was reproductive age group (<40 years). The most common histopathological finding in this study was normal menstrual pattern (48.15 %). The endometrial pathologies observed were hormonal imbalance and pill effect (22.22%), atrophic endometrium (10.19%), chronic endometritis (5.56%), benign endometrial polyp (4.63%), gestation products (3.70%), endometrial hyperplasia (3.70%), and endometrial carcinoma (1.85%). Conclusion: The most commonly known cause of AUB in reproductive age group is due to hormonal imbalance. Endometrial hyperplasia and carcinoma are usually more common in the perimenopausal and postmenopausal age groups. Overall, in patients with no organic cause of AUB, normal cyclical endometrial pattern is the most prevalent endometrial pattern observed.Conclusions: The most commonly known cause of AUB in reproductive age group is due to hormonal imbalance. Endometrial hyperplasia and carcinoma are usually more common in the perimenopausal and postmenopausal age groups. Overall, in patients with no organic cause of AUB, normal cyclical endometrial pattern is the most prevalent endometrial pattern observed

Photochemical Conjugation and One-Pot Radiolabelling of Antibodies for Immuno-PET

Monoclonal antibodies (mAbs), immunoglobulin fragments, and other proteins are important scaffolds in the development of radiopharmaceuticals for diagnostic immuno‐positron emission tomography (immuno‐PET) and targeted radioimmunotherapy (RIT). Conventional methods for radiolabelling proteins with metal ions such as 68Ga, 64Cu, 89Zr, and 90Y require multi‐step procedures involving pre‐purification, functionalisation with a chelate, and subsequent radiolabelling. Standard coupling chemistries are time‐consuming, difficult to automate, and involve synthesis, isolation, and storage of an intermediate, new molecular entity (the conjugated mAb) whose biochemical properties can differ from those of the parent protein. To circumvent these issues, we developed a photoradiochemical approach that uses fast, chemoselective, light‐induced protein modification under mild conditions with novel metal‐ion‐binding chelates derivatised with aryl azide (ArN3) groups. Experiments show that one‐pot photochemical conjugation and radiolabelling of formulated mAbs can be achieved in <20 min

European regional conflicts of the second half of the 1930s and the evolution of the national-socialist Image of enemy

Regional conflicts in West and Central Europe, in the second half of the 1930s symbolized the collapse of the Versailles system, olarizing the situation and affecting the balance of power on the continent. All of them had international aspects, including propaganda aspect. European regional conflicts (1936-1939) have become a convenient case for approbation of the "old" Nazi ideological postulates as well as for development of "new" one

Habitual Alcohol Consumption and its Relationship to Physical Fitness in College - age Students

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Study of Velocity and Materials on Tribocharging of Polymer Powders for Powder Coating Applications

Electrostatic powder deposition is widely used in a plethora of industrial-applications ranging from the pharmaceutical and food.industries, to farm equipment and automotive applications. The disadvantages of this technique are possible back corona (pin-like formations) onset and the Faraday penetration limitation (when the powder does not penetrate in some recessed areas). A possible solution to overcome these problems is to use tribochargers to electrostatically charge the powder. Tribocharging, or contact charging while two materials are in contact, is related to the work function difference between the contacting materials and generates bipolarly charged particles. The generation of an ion-free powder cloud by tribocharging with high bipolar charge and an overall charge density of almost zero, provides a better coverage of the recessed areas. In this study, acrylic and epoxy powders were fluidized and charged by passing through stainless steel, copper, aluminum, and polycarbonate static mixers, respectively. The particle velocity was varied to determine its effect on the net charge-to-mass ratio (QIM) acquired by the powders. In general, the Q/M increases rapidly when the velocity was increased from 1.5 to 2.5 m/s, remaining almost constant for higher velocities. Charge separation experiments showed bipolar charging for all chargers