Brief announcement: passive and active attacks on audience response systems using software defined radios

Audience response systems, also known as clickers, are used at many academic institutions to offer active learning environments. Since these systems are used to administer graded assignments, and sometimes even exams, it is crucial to assess their security. Our work seeks to exploit and document potential vulnerabilities of clickers. For this purpose, we use software defined radios to perform jamming, sniffing and spoofing attacks on an audience response system in production, which provide different possible methods of cheating. The results of our study demonstrate that clickers are easily exploitable. We build a prototype and show that it is practically possible to covertly steal or forge answers of a peer or even an entire classroom, with high levels of confidence. Additionally, we find that the receivers software of the system lacks protection against unexpected answers, which allows our spoofer to submit any ASCII character and opens the receiver up to possible fuzzing attacks. As a result of this study, we discourage using clickers for high-stake assessments, unless they provide proper security protection..http://people.bu.edu/staro/SSS2017_Brief_v0.pdfhttp://people.bu.edu/staro/SSS2017_Brief_v0.pdfhttp://people.bu.edu/staro/SSS2017_Brief_v0.pdfAccepted manuscrip

Disaster Loses in the Developing World: Evidence from the August 1999 Earthquake in Turkey

The purpose of this study is to investigate the impacts of a natural disaster on a developing country’s economy. In that sense, we look at the impact of August 1999 earthquake in Turkey on two important macroeconomic indicators of the Turkish economy (Real Output and Employment) with recovery policies followed by the government and international donors. Our results indicate that the earthquake had a significant immediate negative impact on both output and employment growth in Turkey. While output growth reverted back to its predisaster pattern after the initial shock, employment growth did not recover. The earthquake had both a short run and long run influence on the Turkish economy. This study will develop understanding of the possible effects of future earthquakes. Also, it will help the Turkish Government evaluate already-applied mitigation measures (like Turkish Catastrophe Insurance Pool etc.) and guide the preparation for forthcoming disasters since scientists have reached a consensus that a major earthquake is expected in Istanbul.

Alien Registration- Ewing, James T. (Winslow, Kennebec County)

https://digitalmaine.com/alien_docs/16664/thumbnail.jp

An historical review of the experiences of Eastern Washington University African-American male athletes from the 1960\u27s to the 1970\u27s

This study provided an historical examination of experiences of Eastern Washington University African-American Athletes, as well as their Coaches, and Athletic Directors. The interviewees all attended Eastern during the 60\u27s and 70\u27s. Three African-American players, four coaches who coached them, and three Athletic Director\u27s were interviewed in the study. This study examines how African-American athletes at Eastern were influenced by other African-American athletes or leaders from the 60\u27s through the early 70\u27s. The study also investigates whether or not the Cheney Community was directly affected by these changes that occurred in the 60\u27s through the early 70\u27s. This study shows that Eastern Washington University was directly affected by the civil unrest that was occurring in the United States. This study also identified many protests which took place at Eastern, and one in particular a clinched fist incident that rivaled Tommie Smith\u27s and John Carlos clinched fist in the 1968 Olympic games in Mexico. There is evidence in this study that there were some racial tensions throughout the 60\u27s and 70\u27s, which Coaches, and Athletic Directors had to deal with

Measuring the Regional Economic Response to Hurricane Katrina

Naturkatastrophe; Sturm; Makroökonomischer Einfluss; USA

Calf feeding and management cow and calf management

"January, 1938, Reprinted, March 1940.""Prepared by T. A. Ewing, Extension Animal Husbandman, in collaboration with E. T. Itschner, State Club Agent."Appended to end, "Record blank for members in 4-H livestock clubs.

A parallel multistate framework for atomistic non-equilibrium reaction dynamics of solutes in strongly interacting organic solvents

We describe a parallel linear-scaling computational framework developed to implement arbitrarily large multi-state empirical valence bond (MS-EVB) calculations within CHARMM. Forces are obtained using the Hellman-Feynmann relationship, giving continuous gradients, and excellent energy conservation. Utilizing multi-dimensional Gaussian coupling elements fit to CCSD(T)-F12 electronic structure theory, we built a 64-state MS-EVB model designed to study the F + CD3CN -> DF + CD2CN reaction in CD3CN solvent. This approach allows us to build a reactive potential energy surface (PES) whose balanced accuracy and efficiency considerably surpass what we could achieve otherwise. We use our PES to run MD simulations, and examine a range of transient observables which follow in the wake of reaction, including transient spectra of the DF vibrational band, time dependent profiles of vibrationally excited DF in CD3CN solvent, and relaxation rates for energy flow from DF into the solvent, all of which agree well with experimental observations. Immediately following deuterium abstraction, the nascent DF is in a non-equilibrium regime in two different respects: (1) it is highly excited, with ~23 kcal mol-1 localized in the stretch; and (2) not yet Hydrogen bonded to the CD3CN solvent, its microsolvation environment is intermediate between the non-interacting gas-phase limit and the solution-phase equilibrium limit. Vibrational relaxation of the nascent DF results in a spectral blue shift, while relaxation of its microsolvation environment results in a red shift. These two competing effects result in a post-reaction relaxation profile distinct from that observed when DF vibration excitation occurs within an equilibrium microsolvation environment. The parallel software framework presented in this paper should be more broadly applicable to a range of complex reactive systems.Comment: 58 pages and 29 Figure

Strategic human resource effectiveness, internal marketing and performance in the public sector

Internal marketing (IM) focuses on acquiring and retaining customer-oriented employees and is seen as particularly relevant to service organisations. Critics of internal marketing claim that the term is simply a synonym for good human resources management. The concepts of Internal Marketing and Strategic Human Resource Effectiveness (SHRE) are considered and suitable measures are identified Data is collected from the Australian public sector and a regression analysis is used to investigate the hypothesised relationships. The study provides empirical evidence of a demarcation between IM and SHRE; that SHRE is an important antecedent to IM and that SHRE has both a direct and indirect effect on performance, Management implications are considered and directions for future research offered.peer-reviewe

Brayton-cycle radioisotope heat-source design study. Phase II /preliminary design/ report

Brayton cycle radioisotope heat source desig