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This study aims to test the effects of Technology-related Divestitures (TRDs) on firms' exploratory innovation. The moderating effects of firms' internal and external resource coordination activities, resource buffering and bridging, are also explored.

A set of data including 1,372 Chinese listed firms from 2009 to 2018 is adopted. Based on propensity score matching sample, random-effect Tobit models were employed to test the hypotheses.

The empirical results indicate that TRDs inhibit firms' exploratory innovation, while both resource buffering and bridging can mitigate this negative effect. This implies that to promote exploratory innovation, resource coordination activities are the essential.

The research findings can contribute to both the exploratory innovation and technological divestiture literature. The test on the moderating roles of resource buffering and bridging can also extend our understanding of the effect of TRDs on firms' exploratory innovation. Accordingly, several practical implications can be provided. This is especially important for strategic decisions of firms from emerging and developing countries, which often lack sufficient internal resources and strong technological capabilities to develop exploratory innovation.

This study investigates computer science (CS) students' perceived needs for support in an array of academic and nonacademic areas prior to entering college and relates these findings to their subsequent performance in the core CS curriculum. This study specifically explored how students' perceived needs vary by gender and residency and how these perceived needs relate to students' academic performance in CS courses.

Data included survey responses and academic performance measures from 718 CS students. Approximately 14 percent of the participants were female students, and 86 percent were male students. Also, 24 percent of students were international, 46 percent out-of-state, and 30 percent were in-state students. To address research questions, multiple regressions and analysis of covariance were conducted. For all analyses, students' ACT scores were used as covariates.

Results show significant main effects for both gender and residency, but interaction is not significant. Female students, on average, selected more perceived needs compared to male students. Also, international students selected more needs compared to domestic students. Also, the number of perceived needs for different categories is unique across students of different residency and gender. Results also indicate that the perceived need for assistance with STEM content is associated with lower CS academic performance. In contrast, perceived needs for professional skills and support services are not related to CS performance. Finally, students' ACT score is a good predictor of their academic performance.

This study provides important contributions to higher education and CS education literature. This is the first study with CS students focusing on their perceived needs. Also, this study includes an almost complete data set (94.6 percent survey completion rate) from CS students.

Because of the properties of loess, the occurrence of collapse following deformation of a large settlement is a common problem during the excavation of tunnels on loess ground. Hence, risk management for safer loess tunnel construction is of great significance. The purpose of this paper is to explore the influence of factors on collapse risk of loess tunnels and establish a risk assessment model using rough set theory and extension theory.

The surrounding rock level, groundwater conditions, burial depth, excavation method and support close time were selected as the factors and settlement deformation was the verification index for risk assessment. First, using rough set theory, the influence of risk factors on the collapse risk of loess tunnels was calculated by researching engineering data of excavated sections. Then, a collapse risk assessment model was developed based on extension theory. As the final step, the model was applied to practical engineering in the Loess Plateau of China.

The weights of surrounding rock level, groundwater conditions, burial depth, excavation method and support close time obtained using rough set theory were respectively 10.811 per cent, 18.919 per cent, 24.324 per cent, 40.541 per cent and 5.406 per cent. The assessment results obtained using the model were in good agreement with field observations.

This study highlights key points in collapse risk management of loess tunnels, which could be very useful for future construction methods. The model, using easily obtained parameters, helps in predicting the collapse risk level of loess tunnels excavated under different geological conditions and by different construction organizations and provides a reference for future studies.

This paper aims to the improvement of permanent magnet shape in the popular permanent magnet synchronous machine (PMSM) is proposed in this paper in view to mitigate cogging torque magnitude and torque ripple.

A two-dimensional exact analytical approach of magnetic field distribution is established for the PMSM considering magnet shape and slot opening. The optimal magnet shape is constituted of small number of layers stacked radially. The thickness of each magnet layer is considered equal to about one mm or more; however, a parametric study was performed to determine pole pitch ratio value. The finite element method is used to validate the analytical results.

Cogging torque peaks and torque ripples can be mitigated significantly more than 90 per cent compared to results issued from machine having classical magnet shape. Raising the number of magnet layers can give better results. The results of this paper are compared also with those issued from the machine having sinusoidal magnet shape and give a good solution.

A new technique for cogging torque and torque ripple mitigation is proposed in this paper by changing permanent magnet shape. The proposed final magnet shape is constituted of a set of stacked and well-dimensioned layers relative to the opening angle.

The color painting of ancient buildings has high historical and artistic value but is prone to aging due to long-term outdoor exposure. The purpose of this study is to develop a new type of sealing coating to mitigate the impact of ultraviolet (UV) light on color painting.

The new coating was subjected to a 500-h UV-aging test. Compared with the existing acrylic resin Primal AC33, the UV aging behavior of the new coating, such as color difference and gloss, was studied with aging time. The Fourier infrared spectra of the coatings were analyzed after the UV-aging test.

Compared with AC33, the antiaging performance of SF8 was substantially improved. SF8 has a lower color difference value and better light retention and hydrophobicity. The Fourier transform infrared spectroscopy results showed that the C-F bond and Si-O bonds in the resin of the optimized sealing coating protected the main chain C-C structure from degradation during the aging process; thus, the resin maintained good stability. The hindered amine light stabilizer TN292 added to the coating inhibited the antiaging process by trapping active free radicals.

To address the problem of UV aging of oil-decorated colored paintings, a new type of sealing coating with excellent antiaging properties was developed, laying the foundation for its demonstration application on the surface of ancient buildings.

In recent years, electronic resources have become the library's important storage of a university library, and the fund purchased electronic resources also increased quickly, year after year. In order to find out the readers' present conditions, difficulties and requirement of using e‐recourses, The Library of Shaanxi University of Science and Technology, carried out sampling, questioning and investigating of all teachers and students at campus. The purpose of this paper is to present the findings of this investigation.

The investigation was carried out in 206.3 at the campus, and the investigative target involves teachers, scientific staff, gadre, graduate students, scientific staff, undergraduate students, and some training students, from 15 institutes in the whole university. It centers on seven subjects, deigns 24 question and 155 selective answers, and everyone is multilateral, 1,000 questionnaires were sent out, 909 reclaimed. The ratio is 90.9 percent.

The investigative result shows that: nearly half of the readers investigated are satisfied with e‐resources of our university. At present, the main way that reader's obtained rebases or literature is from traditional library storage. This illustrated that the printing literature obtained important functions. The e‐book does not substitute the traditional printed book. The construction of library storage should advocate the printed one. Readers selecting the printed and e‐book occupy the greatest majority. This shows that the two type of literature are not completely substituted, only mutually supple. The way readers liked obtaining information is to skim the homepage of the library. This indicated the homepage had become the important window to give publicity and serve the outside. It also shows the use of reading on screen, non‐familiarizing the structure and the retrieval method. Showing that the net condition and computer facilities are the main external factors.

This paper analyses the consciousness of using e‐resources, and the ability of obtaining literature for university readers, by investigating some readers' utility of e‐resources at Shaanxi University of Science and Technology. Therefore the readers' range is limited.

In this paper the result from one side reflects every unit and layer personnel's utilizing condition and difficulty of e‐literature at the whole university. By investigating and analyzing, the work emphasis of the library is defined.

The investigating table does not only look into some teachers and students' utilizing condition, and readers' opinions and proposing to use the library's, but also obtains the disseminated fanfaron to all people using the library. By angling the result, it supplies theoretic foundation of e‐resources' order, storage's construction, readers' serve, etc.