More London Wordplay

With the aid of The Wordbook, I have been able to increase somewhat Darryle Francis\u27s collection of transposals, transadditions, and transdeletions on placenames in and near London. All words appear in either The Official Scrabble Players\u27 Dictionary or Darryle Francis\u27s article in the May 1990 Word Ways. Although there are not many new transposals, the number of transadditions and transdeletions has been significantly increased. Further contributions are welcome

A Pale Gold Raven and Other Poems

Poe\u27s The Raven\u27 and Other Poems was a collection of some of the best verse of his career. This collection of my own verse is definitely not of the same quality, but the logological constraints followed should be of interest to readers

Pigpen-Cipher-Invertible Squares

In Maggie Had a Little Pigpen in the May 1991 Word Ways, Peter Newby pointed out that if a 3-by-3 word square was encoded using the pigpen cipher and inverted, it might be possible to read off another 3-by-3 square upon decoding

RANS simulations of a 3D sheet-vortex cavitation

On marine propellers, cavitation appearance and development is critical for performance and erosion considerations. Behind a ship, the propeller experiences all kinds of cavitation types, varying from sheet and bubbles to tip vortex cavitation. When a cavitation analysis is required, two methods are available: experimental or numerical. To find the optimum propeller that fits into different configurations and requirements, designers need accurate predictions within reasonable time. The experimental method is typically used at the end of a design process to verify performance. Therefore, quick and accurate numerical predictions are essential at different stages in the design process, to evaluate performance and cavitation patterns. Mathematical methods range from basic panel codes to the more complex ones, derived from the Navier-Stokes equations. Methods like DES and LES require large meshes and small time steps which makes their usability limited. The most practical viscous numerical method available at the moment in industry is Reynolds Average Navier-Stokes (RANS). The current paper will present the results of a RANS simulation of a 2D sheet cavity and a 3D sheet-tip vortex cavitation. Accurate results of these basic simulations are steps towards the end goal, cavitating propeller simulations. In this method the viscous effects are taken into account with aid of a two equation turbulence model, which results in a reasonably fast approach due to reasonably grids requirements. It is concluded that the RANS method can predict complex 3D sheet-vortex cavitation development and shedding. In addition, it is appropriate for industrial use because it achieves reasonably quick and accurate results. As a next step in the research project, the cavitation development on a propeller will be analyzed with this method.http://deepblue.lib.umich.edu/bitstream/2027.42/84248/1/CAV2009-final49.pd

The decentralization of a sales support department in a medium-large company : A quantitative assessment based on ideas of Thomas L. Saaty and Stafford Beer

In this paper we discuss an integration of the Beer cybernetic oriented management theory and Saaty's hierarchical approach to assess management problems in a more quantitative way

Quantifying the effects of data augmentation and stain color normalization in convolutional neural networks for computational pathology

Stain variation is a phenomenon observed when distinct pathology laboratories stain tissue slides that exhibit similar but not identical color appearance. Due to this color shift between laboratories, convolutional neural networks (CNNs) trained with images from one lab often underperform on unseen images from the other lab. Several techniques have been proposed to reduce the generalization error, mainly grouped into two categories: stain color augmentation and stain color normalization. The former simulates a wide variety of realistic stain variations during training, producing stain-invariant CNNs. The latter aims to match training and test color distributions in order to reduce stain variation. For the first time, we compared some of these techniques and quantified their effect on CNN classification performance using a heterogeneous dataset of hematoxylin and eosin histopathology images from 4 organs and 9 pathology laboratories. Additionally, we propose a novel unsupervised method to perform stain color normalization using a neural network. Based on our experimental results, we provide practical guidelines on how to use stain color augmentation and stain color normalization in future computational pathology applications.Comment: Accepted in the Medical Image Analysis journa

A numerical study on the shedding frequency of sheet cavitation

The last decades there is a strong interest in predicting cavitation dynamics as it is a prerequisite in order to predict cavitation erosion. Industrial applications require accurate results in an acceptable time span and as a result there is a focus on large scale dynamics. In this paper the RANS equations are used to investigate the shedding frequency of sheet cavities in two-dimensional simulations. First a verification study is made for the NACA 0015 in 6 degrees angle of incidence. A grid sensitivity study is conducted in wetted flow and in steady (non-shedding) cavitating condition (σ=1.6). Then an investigation is conducted in order to capture the shedding frequency. The results show that only when a correction for turbulent viscosity at the cavity-water interface is used it was possible to capture the shedding frequency as found in other numerical studies. Furthermore, a validation study is conducted on a NACA66-312 α=0.8 for two different angles of attack. The obtained results are compared and validated with the experimental data from Leroux et al. They indicate that the 2D shedding frequency predicted by the numerical simulations is in good agreement with the frequency obtained in the experiment

Long-term forensic mental health services: an exploratory comparison of 18 European countries

The objective of this study was to explore current provisions within forensic mental health inpatient services for people who require longer-term care within Europe. We used a structured questionnaire and follow-up semi-structured interviews with experts in forensic psychiatry in 18 European countries. All experts interviewed acknowledged the issue of ‘long-stay’ in forensic psychiatry with patient characteristics including chronic mental disorder, treatment-resistance and violent behavior. Formal and informal definitions of ‘long-stay’ varied widely between countries. Eight experts stated that long-stay services are currently available in their country. Of the countries without long-stay services, five experts expressed a need develop them. Improved quality of life and promotion of wellbeing were emphasized as the fundamental treatment philosophy. Even without an agreed definition of ‘long-stay’, it is clear that a proportion of mentally disordered offenders (MDOs) are ‘stuck’ in ‘the system’. Experts shared common concerns in terms of political pressures to contain dangerous MDOs for ensuring public safety as well as ethical debates regarding long-term forensic mental health care. Further research is required to promote dialogue between and within countries to address the balance of patient' rights and public safety, and to produce longitudinal and economic analyses of existing long-stay forensic service provisions