AUTOSIM: An automated repetitive software testing tool

AUTOSIM is a software tool which automates the repetitive run testing of software. This tool executes programming tasks previously performed by a programmer with one year of programming experience. Use of the AUTOSIM tool requires a knowledge base containing information about known faults, code fixes, and the fault diagnosis-correction process. AUTOSIM can be considered as an expert system which replaces a low level of programming expertise. Reference information about the design and implementation of the AUTOSIM software test tool provides flowcharts to assist in maintaining the software code and a description of how to use the tool

Design and analysis of a control system for an optical delay-line circuit used as reconfigurable gain equalizer

The design and analysis of a control system for a coherent two-port lattice-form optical delay-line circuit used as reconfigurable gain equalizer is presented. The design of the control system, which is based on a real device model and a least-square optimization method, is described in detail. Analysis on a five-stage device for the 32 possible solutions of phase parameters showed that, for some filter characteristics, the variations in power dissipation can vary up to a factor of 2. Furthermore, the solution selection has influence on the optimization result and number of iterations needed. A sensitivity analysis of the phase parameters showed that the allowable error in the phase parameters should not exceed a standard deviation of /spl pi//500 in order to achieve a total maximal absolute accuracy error not greater than approximately 0.6 dB. A five-stage device has been fabricated using planar lightwave circuit technology that uses the thermooptic effect. Excellent agreement between simulations and measurements has been achieved

The effect of surface temperature and Reynolds number on the leeward heat-transfer for a shuttle orbiter

The effect of windward surface temperature on the heat transfer to the leeward surface of the shuttle orbiter was investigated. Heat-transfer distributions, surface-pressure distributions, and schlieren photographs were obtained for an 0.01-scale model of the 37-0 shuttle orbiter at angles-of-attack of 30 deg and of 40 deg. Similar data were obtained for a fuselage-only configuration at angles-of-attack of 30 deg and of 90 deg. Data were obtained for various Mach numbers, Reynolds numbers, and surface temperatures

Combustion Gas Properties I-ASTM Jet a Fuel and Dry Air

A series of computations was made to produce the equilibrium temperature and gas composition for ASTM jet A fuel and dry air. The computed tables and figures provide combustion gas property data for pressures from 0.5 to 50 atmospheres and equivalence ratios from 0 to 2.0

Psychological Distress in Women Living with Polycystic Ovary Syndrome (PCOS): The Role of Illness Perceptions

Introduction: Polycystic ovary syndrome (PCOS) is an endocrine and metabolic condition linked to increased risk of anxiety and depression (psychological distress). This study examined the relationship between illness perceptions and psychological distress in women living with PCOS. Methods: We used a cross-sectional survey to assess psychological distress (Hospital Anxiety and Depression Scale) and illness perceptions (Illness Perception Questionnaire-Revised) in women living with PCOS in the UK (N = 487). Hierarchical multiple linear regression tested the associations between illness perceptions and psychological distress, adjusting for age, years since PCOS diagnosis, education, body mass index, current depression, and current anxiety disorder. Results: In the fully adjusted regression model, illness perceptions explained 18.6% of the variance in psychological distress, F(7,458) = 21.0, p < .001. Reporting more symptoms (B = 0.226), higher perceived consequences (B = 0.204), lower personal control (B = –0.184), and lower illness coherence (B = –0.127) were significantly associated with higher psychological distress (all p < .001). Conclusions: Illness perceptions may play an important role in psychological distress, even after adjusting for relevant demographics and clinical characteristics. Our findings highlight key areas where researchers and clinicians could develop targeted self-management interventions for women with PCOS, focused on altering maladaptive illness perceptions to reduce psychological burden

Constructing applicative functors

Applicative functors define an interface to computation that is more general, and correspondingly weaker, than that of monads. First used in parser libraries, they are now seeing a wide range of applications. This paper sets out to explore the space of non-monadic applicative functors useful in programming. We work with a generalization, lax monoidal functors, and consider several methods of constructing useful functors of this type, just as transformers are used to construct computational monads. For example, coends, familiar to functional programmers as existential types, yield a range of useful applicative functors, including left Kan extensions. Other constructions are final fixed points, a limited sum construction, and a generalization of the semi-direct product of monoids. Implementations in Haskell are included where possible

Coagulation and fragmentation processes with evolving size and shape profiles : a semigroup approach

We investigate a class of bivariate coagulation-fragmentation equations. These equations describe the evolution of a system of particles that are characterised not only by a discrete size variable but also by a shape variable which can be either discrete or continuous. Existence and uniqueness of strong solutions to the associated abstract Cauchy problems are established by using the theory of substochastic semigroups of operators