An investigation of volcanic gases and dust (aerosols) in the stratosphere

There are no author-identified significant results in this report

Calorimetry, activity, and micro-FTIR analysis of CO chemisorption, titration, and oxidation on supported Pt

The value of in situ analysis on CO chemisorption, titration and oxidation over supported Pt catalysts using calorimetry, catalytic and micro-FTIR methods is illustrated using silica- and titania-supported samples. Isothermal CO-O and O2-CO titrations have not been widely used on metal surfaces and may be complicated if some oxide supports are reduced by CO titrant. However, they can illuminate the kinetics of CO oxidation on metal/oxide catalysts since during such titrations all O and CO coverages are scanned as a function of time. There are clear advantages in following the rates of the catalyzed CO oxidation via calorimetry and gc-ms simultaneously. At lower temperatures the evidence they provide is complementary. CO oxidation and its catalysis of CO oxidation have been extensively studied with hysteresis and oscillations apparent, and the present results suggest the benefits of a combined approach. Silica support porosity may be important in defining activity-temperature hysteresis. FTIR microspectroscopy reveals the chemical heterogeneity of the catalytic surfaces used; it is interesting that the evidence with regard to the dominant CO surface species and their reactivities with regard to surface oxygen for present oxide-supported Pt are different from those seen on graphite-supported Pt

On the design of an energy-efficient low-latency integrated protocol for distributed mobile sensor networks

Self organizing, wireless sensors networks are an emergent and challenging technology that is attracting large attention in the sensing and monitoring community. Impressive progress has been done in recent years even if we need to assume that an optimal protocol for every kind of sensor network applications can not exist. As a result it is necessary to optimize the protocol for certain scenarios. In many applications for instance latency is a crucial factor in addition to energy consumption. MERLIN performs its best in such WSNs where there is the need to reduce the latency while ensuring that energy consumption is kept to a minimum. By means of that, the low latency characteristic of MERLIN can be used as a trade off to extend node lifetimes. The performance in terms of energy consumption and latency is optimized by acting on the slot length. MERLIN is designed specifically to integrate routing, MAC and localization protocols together. Furthermore it can support data queries which is a typical application for WSNs. The MERLIN protocol eliminates the necessity to have any explicit handshake mechanism among nodes. Furthermore, the reliability is improved using multiple path message propagation in combination with an overhearing mechanism. The protocol divides the network into subsets where nodes are grouped in time zones. As a result MERLIN also shows a good scalability by utilizing an appropriate scheduling mechanism in combination with a contention period

Ethics Curriculum in Accounting Courses: Examination of Student Perceptions of Delivery Methods

The authors explore student perceptions about the need for ethics instruction within an undergraduate accounting curriculum. Students enrolled in an online, undergraduate accounting courses were sampled. The purpose of this study was to specifically examine students’ preference between using a stand-alone approach to teaching ethics or using an integrated model. Results included suggest that over 92% of students desire an ethics component within the curriculum. And, 56% of the participants prefer an integrated model. Results suggest that ethics courses should include case studies, real-world ethical situations, and ethical dilemma consideration. The beneficiaries of the study include students, faculty, administrators, textbook providers, and curriculum designers, among others

Report of the panel on volcanology, section 4

Two primary goals are identified as focal to NASA's research efforts in volcanology during the 1990s: to understand the eruption of lavas, gases, and aerosols from volcanoes, the dispersal of these materials on the Earth's surface and through the atmosphere, and the effects of these eruptions on the climate and environment; and to understand the physical processes that lead to the initiation of volcanic activity, that influence the styles of volcanic eruptions, and that dictate the morphology and evolution of volcanic landforms. Strategy and data requirements as well as research efforts are discussed

Leadership Adaptability Within Higher Education

Dynamism in the higher education industry (HEI) has created unprecedented complexity and uncertainty for leaders at colleges and universities across the globe. The challenges to competitive advantage and sustainability created by dynamic conditions have been exacerbated and accelerated by the COVID-19 pandemic and health crisis. HEI leaders are struggling to adapt antiquated and traditionally held methods and practices to navigate the rapid changes and survive the resulting chaos. The ability of leaders to adapt to dynamism in contemporary industry conditions is influenced by the external and internal environments; in term, these leaders’ capacity for change impacts the adaptability of the institutions they serve. This study examines how senior- and mid-level leaders at small private liberal arts colleges and universities are engaging in adaptive behaviors to help their organizations better compete despite challenges