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This study investigates the contribution of personality traits (HEXACO traits and Schizotypy) and social status dimensions (sociometric and perceived popularity) in understanding boys’ and girls’ respective academic achievement. The sample included 163 elementary school students from Serbia, aged 14–15 (87 girls and 76 boys). Regression analysis reveals that personality traits explain a similar amount of academic achievement variance in two gender groups (22% vs. 20% in girls’ favor), but social status proves to be a better predictor of academic achievement for boys (27% vs. 4% in boys’ favor). High Conscientiousness, perceived popularity as well as low extraversion turned out to be related to girls’ academic achievement. Low Schizotypy and Honesty‐Humility, as well as high openness, sociometric, and perceived popularity turned out to be related to boys’ academic achievement. Conscientiousness appears not to be related to boys’ academic achievement. The results are discussed and recommendations for improving educational practices are offered. 相似文献
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In this paper, quantitative measures for the assessment of the hydraulic excavator digging efficiency are proposed and developed. The following factors are considered: (a) boundary digging forces allowed for by the stability of an excavator, (b) boundary digging forces enabled by the driving mechanisms of the excavator, (c) factors taking into consideration the digging position in the working range of an excavator, and (d) sign and direction of potential digging resistive force. A corrected digging force is defined and a mathematical model of kinematic chain and drive mechanisms of a five-member excavator configuration was developed comprising: an undercarriage, a rotational platform and an attachment with boom, stick, and bucket. On the basis of the mathematical model of the excavator, software was developed for computation and detailed analysis of the digging forces in the entire workspace of the excavator. By using the developed software, the analysis of boundary digging forces is conducted and the corrected digging force is determined for two models of hydraulic excavators of the same mass (around 17 000 kg) with identical kinematic chain parameters but with different parameters of manipulator driving mechanisms. The results of the analysis show that the proposed set of quantitative measures can be used for assessment of the digging efficiency of existing excavator models and to serve as an optimization criterion in the synthesis of manipulator driving mechanisms of new excavator models. 相似文献
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The paper proposes an innovative procedure for benchmarking the digital divide. The study demonstrates the potential of an outranking approach as an alternative to the commonly used ranking models based on Composite Indices (CIs). To fulfill the objectives of the benchmarking process, an ELECTRE-based (ELimination Et Choix Traduisant la REalité; Elimination and Choice Corresponding to Reality) multi-level outranking (ELECTRE MLO) method is developed. The proposed approach improves on previous methods of benchmarking the digital divide in two ways: by classifying countries into hierarchical levels of performance and by identifying corresponding benchmarks for less successful ones. The method is applied to 29 EBRD (European Bank for Reconstruction and Development) countries of operation. The results are visualized in the form of a relation tree, thus providing clear insights for policy-makers regarding how countries stand relative to each other. 相似文献
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This paper offers an efficient sliding manifold design method that minimizes the impact of unmatched disturbances onto SM dynamics and system accuracy. System sensitivity upon unmatched constant or slowly varying external disturbance vector is evaluated by the steady-state dependent criterion function. An infinite set of sliding manifolds that minimize the chosen optimization criterion is determined and a way of selecting a manifold out of that set that provides adopted SM dynamics is suggested. The proposed approach has been demonstrated on numerical examples and verified by simulations. 相似文献
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