Evaluation of the propensity for coal spontaneous combustion based on catastrophe theory

Generally, different prevention measures should be taken according to spontaneous combustion propensities. The current methods to evaluate the propensity of coal spontaneous combustion, such as chromatographic method of oxygen adsorption, oxidation kinetics method and activation energy method, are mostly affected by human factors. Their boundaries among different classes of propensities were all established by subjective judgments. A new evaluation method using catastrophe theory is introduced. This method can accurately depict the process of coal spontaneous combustion and the evaluation index, “catastrophe temperature”, be obtained based on the model. In terms of catastrophe temperature, the spontaneous combustion propensity of different coals can be sequenced. Experimental data indicate that this method is appropriate to describe the spontaneous combustion process and to evaluate the propensity of coal spontaneous combustion.     

MOISTURE DEFFUSIVITY METHODS OF EXPERIMENTAL DETERMINATION AREVIEW

A critical presentation of the moisture diffusivity estimation methods in the field of solids drying is attempted. Methods are classified, discussed, and tabulated with corresponding references. Each particular method is briefly described and discussed in terms of its simplicity, accuracy of moisture diffusivity prediction, and applicability to various materials     

Differential roles of neuroticism, extraversion, and event desirability for mood in daily life: An integrative model of top-down and bottom-up influences.

Top-down and bottom-up approaches were combined to assess the relative impact of extraversion, neuroticism, and daily events on daily mood. Ninety-six community-residing men completed diaries for 8 consecutive nights. Extraversion predicted positive mood, whereas neuroticism predicted positive and negative mood. Undesirable events predicted negative mood and, more modestly, positive mood. Desirable events predicted positive mood. Negative dispositional and situational factors play a larger role in daily positive affect than positive factors do in daily negative affect. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A hybrid Eulerian-Lagrangian approach for thickness, correspondence, and gridding of annular tissues.

We present a novel approach to efficiently compute thickness, correspondence, and gridding of tissues between two simply connected boundaries. The solution of Laplace's equation within the tissue region provides a harmonic function whose gradient flow determines the correspondence trajectories going from one boundary to the other. The proposed method uses and expands upon two recently introduced techniques in order to compute thickness and correspondences based on these trajectories. Pairs of partial differential equations are efficiently computed within an Eulerian framework and combined with a Lagrangian approach so that correspondences trajectories are partially constructed when necessary. Examples are presented in order to compare the performance of this method with those of the pure Lagrangian and pure Eulerian approaches. Results show that the proposed technique takes advantage of both the speed of the Eulerian approach and the accuracy of the Lagrangian approach.     

Analyzing correlations of three types in selected lines of Drosophila melanogaster that have evolved stable extreme geotactic performance.

The behavior–genetic analysis of Drosophila melanogaster with geotactic performance as the phenotype is an ideal model system with which to investigate the complex relations between heredity and behavior. As part of a long-term, 38-year study, we report 4 experiments that identify and analyze trait correlations in the selected high- and low-geotaxis lines. We performed F2 correlational analyses and backcrosses to examine 3 types of correlations: (a) genotype–genotype (alcohol dehydrogenase [Adh]–amylase [Amy]), (b) genotype–phenotype (Adh and Amy–geotaxis), and (c) phenotype–phenotype (mate preference–geotaxis). Only the Adh-geotaxis correlation survived meiosis and reappeared in the F2 generation, which indicates a genotype-phenotype correlation, whereas the others did not. The importance of hybrid correlational analysis to the behavior–genetic analysis of a species is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Accelerating entry into transitional employment in a psychosocial rehabilitation agency.

Hypothesized that the process of vocational rehabilitation could be accelerated by artificially limiting the length of time members were assigned to prevocational crews. 107 clients admitted to a psychosocial rehabilitation program classified according to prior work experience, were assigned to either the standard gradual vocational program or an accelerated program requiring their early involvement in transitional employment. After 15 mo, 20% of the accelerated Ss were in competitive employment, compared with 7% of gradual Ss. 15% of accelerated Ss were in prevocational crews, compared with 35% of gradual Ss. All 7 of the members working full-time at 15 mo were in the accelerated group. Work-experienced Ss benefited from the accelerated approach. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Evaluation of Wechsler Adult Intelligence Scale—Revised premorbid IQ formulas in clinical populations.

The use of demographic variables in the prediction of premorbid IQ has been noted to show some promise (R. S. Wilson et al; see record 1979-26429-001). With the revision of the Wechsler Adult Intelligence Scale (WAIS—R) and subsequent development of a regression formula for the WAIS—R (A. Barona et al; see record 1985-04035-001), some authors have suggested that continued use of the Wilson formulas is inappropriate. The present study examined the efficacy of both Wilson and Barona formulas in the prediction of concurrently obtained IQ levels in neurologically normal psychiatric (n?=?77) and brain-damaged (n?=?64) patients. The results demonstrated that neither formula differed significantly in terms of classifications of IQ range, with both formulas performing essentially at chance levels. Qualitative and quantitative differences between the formulas are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)