ActivSense Sidestick: a Force Sensing and Force Feedback Joystick

As aircraft systems continue to become more integrated and fully electronic, hence fly-by-wire, the pilot is slowly losing the physical cues that were once relied upon for the safe operation of the aircraft. Many commercial airliners, such as Airbus, use passive sidesticks that integrate with the electronic flight controls system. These sidesticks move much like a gaming joystick which results in the pilot not having any “feel” for the aerodynamic forces present on the control surfaces. Without the force feedback of a mechanically linked control system the pilot could inadvertently stall the aircraft or place it into an unstable flight condition. To combat this, the active sidestick will include a servo mechanism to provide force feedback and use strain gauges to determine the force applied to the sidestick by the pilot. Multiple sources of data, such as the aircraft configuration and critical speeds can be used to produce a force gradient which resist a pilot’s inputs if they are exceeding the aircraft capabilities. The active sidestick will interface with PC based flight simulation to control an aircraft and receive flight characteristic data to properly adjust the forces present on the sidestick. Being solely based on force input for aircraft control, if there were to be an in-flight failure of the servos the pilot would still be able to control the aircraft by force alone. Such a sidestick could be used in any number of aviation applications; it would improve the safety of unmanned aircraft operations in which the pilot/operator receives no tactile feedback at the controls. It could also become physically small enough and cost effective to be outfitted in modern general aviation aircraft to prevent the all-too-common loss of control scenario upon landing or takeoff

Algunos productos y cultivos de la comarca

En número dedicado a: Las Hurde

Artesanía de la seda en Valencia: telares manuales

En número dedicado a: Valenci

Primary structure of matrilin-3, a new member of a family of extracellular matrix proteins related to cartilage matrix protein (matrilin-1) and von Willebrand factor 1The nucleotide sequences reported in this paper have been submitted to the EMBL nucleotide sequence database with accession numbers Y10521 and Y13341.1

AbstractA mouse cDNA encoding for matrilin-3, the third member of the novel matrilin family of extracellular matrix proteins, was cloned. The protein precursor of 481 amino acids consists of a putative signal peptide, a short positively charged sequence, a single vWFA-like domain followed by four epidermal growth factor-like modules and a potential coiled-coil α-helical oligomerization domain at the C-terminus. It is the smallest member of the matrilin family with a predicted Mr of the mature protein of 48 902. The primary structure of a C-terminal portion of 310 amino acids of the human matrilin-3 was determined and showed a sequence identity to the mouse matrilin-3 of 84.8%. Northern blot hybridization of mouse matrilin-3 mRNA showed a 2.9 kb mRNA expressed in sternum, femur and trachea and indicates a cartilage-specific expression

Scalable and Distributed Resource Management for Many-Core Systems

Many-core systems provide researchers with important new challenges, including the handling of very dynamic and hardly predictable computational loads. The large number of applications and cores causes scalability issues for centrally acting heuristics, which always must retain a global view of the entire system. Resource management itself can become a bottleneck which limits the achievable performance of the system. The focus of this work is to achieve scalability of resource management

Biochemische Charakterisierung der Helikasen AtRECQ2 und AtRECQ3 von Arabidopsis thaliana

RecQ-Helikasen spielen eine wichtige Rolle beim Erhalt der genomischen Stabilität. In dieser Arbeit wurden zwei RecQ-Helikasen aus dem pflanzlichen Modellorganismus Arabidopsis thaliana biochemisch charakterisiert, AtRECQ2 und AtRECQ3. Dabei konnte die Hypothese, dass es sich bei AtRECQ2 und HsWRN (ohne Exonukleasefunktion) um funktionelle Homologe handelt, gefestigt werden

Untersuchung der Rolle der Annealing Helikasen HARP und AH2 sowie der Transläsionspolymerase REV3 in der DNA-Schadensantwort von Arabidopsis thaliana

The aim of this thesis was to examine the annealing helicases HARP and AH2 as well as the TLS-polymerase REV3 regarding their functions in DNA-repair and -recombination in the model plant Arabidopsis thaliana

Factors Influencing College Students’ Acceptance of Push Communication Technology as a Means of Receiving Course-Related Content

The purpose of this dissertation was to identify the factors that influence college students’ acceptance of push communication (i.e., email and SMS messaging) as a means of receiving course-related content. This research combined mobile learning models and technology acceptance theories along with push communication literature to determine if a scheduled message impacted students’ reception of the technology. This study was conducted through two universities and six professors with a total enrollment of 343 students. The surveys were pushed to each student via email and Short Message Service (SMS) text messaging, which resulted in 301 students that opted to participate in the study. A total of four research questions were answered by sixteen hypotheses, of which seven supported the research questions. The most significant of the results was that scheduled messages, the newest construct in the model, did not affect the students’ intention to use push communication as a means to receive course-related content. These findings, based on the survey results, were then compared to actual usage patterns by using Google Analytics embedded in courses’ HTML landing pages.I. INTRODUCTION 1 | Problem Statement 3 | Purpose Statement 4 | Definitions 5 | Conceptual Framework 7 | Data Collection 8 | Research Questions 12 | Significance of Study 14 | Assumptions 15 | Limitations 15 | Overview of the Dissertation Chapters 16 | Summary 17 | II. LITERATURE REVIEW 18 | Mobile Learning Models 19 | Universal Instructional Design Principles 25 | Technology Acceptance Theories 30 | Spaced Retrieval Theories 59 | III. METHODOLOGY 61 | Research Model 61 | Research Design 67 | Data Analysis 75 | IV. DATA ANALYSIS 78 | Description of the Respondents 78 | Partial Least Squares Path Modeling Results 80 | The Research Model Test 87 | V. CONCLUSION 110 | Summary of the Study 110 | Discussion of the Findings 110 | Contributions of the Study 123 | Limitations of the Study 125 | Suggested Future Research 126 | Summary 127 | REFERENCES 128 | APPENDIX A: Institution Review Board Protocol Exemption Report 141 | APPENDIX B: Institution Review Board Protocol Exemption Report 143 | APPENDIX C: Push Communication Technology Survey 145 | APPENDIX D: Screenshot of Scheduled Email HTML Page 149 | APPENDIX E: Screenshot of Schedule SMS in HTML Page 151 | APPENDIX F: Screenshot of Schedule SMS in Google Analytics 153 |Leader, Lars F.Gibson, Nicole M.Hsiao, E-LingMarshall, BryanLaPlant, James T.Ed.D.Education in Leadershi

Multi-product Firms and Product Variety

A preliminary version of this paper was circulated under the title "Too many or too few varieties: the role of multi-product firms" (CEPR Discussion Papers; 5938, Nov. 2006).-- Trabajo publicado como artículo en Economica 79(314): 303-328 (2012).-- http://dx.doi.org/10.1111/j.1468-0335.2011.00897.xThe goal of this paper is to study the role of multi-product firms in the market provision of product variety. The analysis is conducted using the spokes model of non-localized competition proposed by Chen and Riordan (2007). Firstly, we show that multi-product firms are at a competitive disadvantage vis-a-vis single-product firms and can only emerge if economies of scope are sufficiently strong. Secondly, under duopoly product variety may be higher or lower with respect to both the first best and the monopolistically competitive equilibrium. However, within a relevant range of parameter values duopolists drastically restrict their product range in order to relax price competition, and as a result product variety is far below the efficient level.We thank the CREA Barcelona Economics Program and the Spanish Ministry of Education and Science (grants SEJ2005-01427 and SEJ2006-13768) for their support.Peer reviewe