Meter for use in detecting tension in straps having predetermined elastic characteristics

A meter for detecting tension in elastic bodies, especially in fabric straps employed as tie down straps for stowed objects is presented. The meter is characterized by a pair of elongated arms coupled together for pivotal motion about a common axis in a common plane and a strap receiver located at adjacent ends of the arms for receiving and securing adjacent portions of the strap. The receivers are supported by the arms for motion along intersecting arcs, and motion detection means is located at the opposite ends of the arms for detecting the magnitude of the motion imparted to the receivers as the strap is placed in tension

Constricted high enthalpy arc heater design and performance data, including calculations for a 10 MW design First interim technical report

Performance prediction and design analysis of constricted coaxial-flow arc air heaters for materials testing and atmospheric entry simulatio

“It [my research] would take place at 11:50PM”: Constructing a Realistic Simulation to Study Online Information Evaluation for School Projects

When students explore a search results page for a school-related project, what leads them to select a resource? We explore this question in our IMLS-funded research study, Researching Student Information Choices: Identifying and Judging the Credibility of Online Sources. In this session we introduce our novel simulation-based research method. We designed a simulated environment to study students’ online information-seeking behavior and understand their point-of-selection behavior when they determine that a resource potentially meets their research need. Simulated search engine results pages were used to examine students’ information selection decisions for an age-appropriate research prompt. The simulation collected quantitative data and served as the basis for think-aloud protocols that captured students’ cognition in action. This provided us not only with reliable data on what students decided but also rich data on why they made different judgments about the helpfulness, citability, credibility, and container of various online resources. The controlled environment also allowed us to make direct comparisons within and across student groups representing 4th grade through graduate school. The challenges of developing and employing a simulation to study information behavior include the time, effort, and expertise required and the trade-offs between creating a realistic environment and ensuring that the data captured can be meaningfully analyzed and used to address research questions. However, the result of using a simulated environment in combination with standard LIS research methods aids a deeper understanding of how and why students\u27 select the online resources they do during their initial search process

Occurrence of common milkweed (Asclepias syriaca) in cropland and adjacent areas

Interest in the population dynamics and geographic distribution of common milkweed (Asclepias syriaca L.) has recently increased due to the importance of common milkweed in the life cycle of the monarch butterfly (Danaus plexippus). A survey of common milkweed occurrence in various habitats was conducted in Iowa in June and July of 1999. Common milkweed was found in 71% of the roadsides and approximately 50% of the corn (Zea mays L.) and soybean (Glycine max L. Merr.) fields. Corn and soybean fields had 85% fewer patches than roadsides. Conservation reserve program fields had the greatest average area infested. While common milkweed was frequently found in corn and soybean fields, average frequency and patch sizes were much greater in noncrop areas

Positively Perplexing E-Books: Digital Natives’ Perceptions of Electronic Information Resources

Anecdotal evidence from user surveys and the experiences of information professionals portray a picture that today’s students (i.e., “digital natives”) do not differentiate between the variety of information resources online. The issue of container only becomes problematic to these students when they have to produce a scholarly work and cite their information sources. Then the question becomes, “What is it?” This paper will present preliminary data from a survey of university students on how they recognize and label electronic information resources. The authors will explore such questions as: Do users recognize an e-book as a book? If not, how do they categorize it? Does the amount and placement of labeling from the publisher make a difference in their recognition? Do they differentiate between an academic database and a search engine? Are a newspaper article and a peer-reviewed journal article considered synonymous

Initial dates of weed emergence

Timing of weed emergence varies both from year to year and also across the state. The table provides information on the initial date of emergence of five early weed species at locations across Iowa. Giant ragweed, one of the earliest emerging summer annuals found in crop fields, initiated emergence in the last week of March or first week of April in both 1998 and 1999. At most locations giant foxtail began emergence about 4 weeks after giant ragweed, but at the SE (Crawfordsville) location there has been only a 2-week difference in initial emergence of these species

Articulating the Value of Our Daily Work: An Initial Discussion of the Assessment Challenges of Engineering Librarians

Engineering librarians need to assess the effectiveness of our library instruction and outreach for many reasons, including communicating library value to institutional stakeholders and making impactful contributions to the scholarly literature. However, as practitioners, most librarians have not been formally educated in research design, data collection, and data analysis. To increase our skills and knowledge and to better align with various publication expectations and guidelines (e.g., ELD Author Guidelines), this panel will lead a discussion on library assessment needs with regard to research design, data collection, data analysis, and dissemination and discovery. The goal of the panel is to facilitate a conversation regarding librarian assessment challenges and needs to design a future ASEE workshop. Panelists: Amy Buhler, Margaret Phillips, Amy Van Epps This presentation was delivered as part of a modified panel session at the 2019 ASEE Annual Conference in Tampa, Florida

Germanium Detector with Internal Amplification for Investigation of Rare Processes

Device of new type is suggested - germanium detector with internal amplification. Such detector having effective threshold about 10 eV opens up fresh opportunity for investigation of dark matter, measurement of neutrino magnetic moment, of neutrino coherent scattering at nuclei and for study of solar neutrino problem. Construction of germanium detector with internal amplification and perspectives of its use are described.Comment: 13 pages, latex, 3 figures, report at NANP-99, International Conference on Non-Accelerator Physics, Dubna, Russia, June 29- July 3, 1999. To be published in the Proceeding

Emergence Characteristics of Several Annual Weeds

No other event in the life cycle of weeds affects scouting and management timing as greatly as weed emergence. The timing and intensity of weed emergence affect everything from the effectiveness of burndown herbicides and preplant tillage, to timing of postplant tillage and herbicide application, to competitiveness of weeds that escape control, to seed production by surviving plants, to eventually population shifts. Given the importance of weed emergence to all forms of weed management, it seems logical that we should give greater attention to understanding and predicting weed emergence as affected by environmental factors, weed species, and management practices

Emergence Patterns of Annual Weeds of Corn and Soybean

A better understanding of weed biology is critical for the development of more efficient weed management systems. Improved information on weed biology will not allow us to eliminate the inputs currently used to manage weeds. However, it provides the foundation for the development of new strategies and more efficient techniques to use these tools, resulting in more reliable weed management systems that are cost-effective and pose less threat to the environment