Drexel University

About: Drexel University is a education organization based out in Philadelphia, Pennsylvania, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 26770 authors who have published 51438 publications receiving 1949443 citations. The organization is also known as: Drexel & Drexel Institute.

Creditor Control Rights and Firm Investment Policy

Abstract: We present novel empirical evidence that conflicts of interest between creditors and their borrowers have a significant impact on firm investment policy. We examine a large sample of private credit agreements between banks and public firms and find that 32% of the agreements contain an explicit restriction on the firm's capital expenditures. Creditors are more likely to impose a capital expenditure restriction as a borrower's credit quality deteriorates, and the use of a restriction appears at least as sensitive to borrower credit quality as other contractual terms, such as interest rates, collateral requirements, or the use of financial covenants. We find that capital expenditure restrictions cause a reduction in firm investment and that firms obtaining contracts with a new restriction experience subsequent increases in their market value and operating performance.

Role stressors, social support, and well‐being among two‐career couples

Abstract: Summary The study examined relationships among work and family role stressors, work-family conflict, social support, and well-being using data gathered from 119 men and 119 women who were partners in a two-career relationship. Results showed that withindomain relationships of stressors with well-being are stronger than between-domain relationships. Thus, work and family role stressors were primarily related to job satisfaction and family satisfaction respectively, whereas work and family role stressors as well as work-family conflict were associated with overall life stress. Similar results were found for the relationships of social support with well-being. Work support was associated with increased job satisfaction, while spouse support was associated with greater family satisfaction. Some gender differences were found in the relationships of stressors and social support with well-being. Implications of the findings for future research on work-family dynamics were discussed.

Herding behavior in Chinese stock markets: An examination of A and B shares

Abstract: This study examines herding behavior in dual-listed Chinese A-share and B-share stocks. We find evidence of herding within both the Shanghai and Shenzhen A-share markets that are dominated by domestic individual investors, and also within both B-share markets, in which foreign institutional investors are the main participants. Herding occurs in both rising and falling market conditions. Herding behavior by A-share investors in the Shanghai market is more pronounced under conditions of rising markets, high trading volume, and high volatility, while no asymmetry is apparent in the B-share market.

Monitoring oxidation of multiwalled carbon nanotubes by Raman spectroscopy

Abstract: Multiwalled carbon nanotubes (MWCNTs) were oxidized in air and acids while varying the treatment time and/or temperature. The goal of this approach was to create the highest density of carboxyl groups with moderate sample loss, which is necessary for nanocomposite applications. In situ Raman experiments allowed real-time observation of the structural changes in MWCNTs upon oxidation. The ratio of the Raman intensities of the D and G bands was used to estimate the concentration of defects. It was found that while an oxidation for 6 h in H2SO4/HNO3 provided the strongest effect, a ‘flash oxidation’ in air (15 min at 550 °C) also leads to an efficient functionalization in a cost-effective and environmentally friendly way. Transmission electron microscopy, Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis and electrophoretic mobility analysis were used to study the oxidized nanotubes. Copyright © 2007 John Wiley & Sons, Ltd.

The state of the art in end-user software engineering

Abstract: Most programs today are written not by professional software developers, but by people with expertise in other domains working towards goals for which they need computational support. For example, a teacher might write a grading spreadsheet to save time grading, or an interaction designer might use an interface builder to test some user interface design ideas. Although these end-user programmers may not have the same goals as professional developers, they do face many of the same software engineering challenges, including understanding their requirements, as well as making decisions about design, reuse, integration, testing, and debugging. This article summarizes and classifies research on these activities, defining the area of End-User Software Engineering (EUSE) and related terminology. The article then discusses empirical research about end-user software engineering activities and the technologies designed to support them. The article also addresses several crosscutting issues in the design of EUSE tools, including the roles of risk, reward, and domain complexity, and self-efficacy in the design of EUSE tools and the potential of educating users about software engineering principles.