The Influence of Roots on the Accuracy of Soil-Moisture Measurements Taken with a Neutron Moisture Meter

The effects of roots on soil-moisture measurements taken with a neutron probe were studied. These effects were observed under three different soil-moisture conditions, with different sized roots, and with varying distances between the access tube and root. The moisture conditions used were air dry, field capacity, and saturated. Large roots can greatly affect neutron soil-moisture measurements when the access hole is drilled through the root. Positive errors as large as 52 percent were found when the soil moisture was at field capacity. With dry and saturated conditions positive errors of 43 percent and 38 percent respectively, were found. In most practical field situations, where the access hole is not drilled through large roots, root material appears to have very little effect, if any, on neutron soil-moisture measurements. The largest positive error found, when the access holes were not drilled through the roots, was only 8 percent. This occurred at a point where the access tube was in contact with the outside of a root

HEP Outreach, Inreach, and Web 2.0

I report on current usage of multimedia and social networking "Web 2.0" tools for Education and Outreach in high-energy physics, and discuss their potential for internal communication within large worldwide collaborations, such as those of the LHC. Following a brief description of the history of Web 2.0 development, I present a survey of the most popular sites and describe their usage in HEP to disseminate information to students and the general public. I then discuss the potential of certain specific tools, such as document and multimedia sharing sites, for boosting the speed and effectiveness of information exchange within the collaborations. I conclude with a brief discussion of the successes and failures of these tools, and make suggestions for improved usage in the future.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90828/1/1742-6596_331_8_082003.pd

Evaluation of a dry EEG system for application of passive brain-computer interfaces in autonomous driving

© 2017 Zander, Andreessen, Berg, Bleuel, Pawlitzki, Zawallich, Krol and Gramann. We tested the applicability and signal quality of a 16 channel dry electroencephalography (EEG) system in a laboratory environment and in a car under controlled, realistic conditions. The aim of our investigation was an estimation how well a passive Brain-Computer Interface (pBCI) can work in an autonomous driving scenario. The evaluation considered speed and accuracy of self-applicability by an untrained person, quality of recorded EEG data, shifts of electrode positions on the head after driving-related movements, usability, and complexity of the system as such and wearing comfort over time. An experiment was conducted inside and outside of a stationary vehicle with running engine, air-conditioning, and muted radio. Signal quality was sufficient for standard EEG analysis in the time and frequency domain as well as for the use in pBCIs. While the influence of vehicle-induced interferences to data quality was insignificant, driving-related movements led to strong shifts in electrode positions. In general, the EEG system used allowed for a fast self-applicability of cap and electrodes. The assessed usability of the system was still acceptable while the wearing comfort decreased strongly over time due to friction and pressure to the head. Fromthese results we conclude that the evaluated system should provide the essential requirements for an application in an autonomous driving context. Nevertheless, further refinement is suggested to reduce shifts of the system due to body movements and increase the headset’s usability and wearing comfort

'Pataphysical Software: (Ridiculous) Technological Solutions for Imaginary Problems

These days, whether the problem is climate change or boredom, there is an app for that. The rhetoric of problem and solution, accelerated by commercial needs and salvific tech gurus, implies that software can save the world. This paper wants to start a movement/rebellion against the ubiquitous equation of P(problem) + S(software) = S(solution) as a rational approach to the ailments of this world. We question the technological effort to "playfully" afford order and control to humans through the provision of computational rules. Instead, we propose an alternative approach: designing 'pataphysical software to address familiar but ultimately imaginary problems. Defined by poet Alfred Jarry, 'pataphysics is the science of imaginary problems. Adopting the methods of 'pataphysics, we have developed mobile applications that explore invented problems and provide no solutions for them. We demonstrate how such an approach allows us to ask design questions through an aesthetic 'pataphysical practice of software development

Open For Good - Voices from the Field

This compendium captures the wisdom shared from the many authors who contributed to our Open for Good blog series between 2017-2019. This collection of voices, representing "knowledge sharing champions" from across the field, explores tools, practices, and examples showing how foundations are opening up about what they are learning for the benefit of the philanthropic sector, and for the greater good

Fostering Software Developers' Productivity at Work Through Self-Monitoring and Goal-Setting

Software development organizations strive to enhance the productivity of their developers. While research has looked into various ways for improving developer productivity, little is known about the activities they pursue at work, how these activities influence the fragmentation of work, and how these insights could be leveraged to foster productivity at work. In my PhD thesis, I address software developer productivity by taking a mixed-method approach to investigate developers’ perceptions of productivity in the field and to examine the individual differences of each developer’s work. My goal is to increase developers’ awareness about their own work habits and productivity, and to encourage productive behavior changes at work through the provision of two persuasive technologies, self-monitoring and goal-setting

Giving 2.0 ::transform your giving and our world /

"Today's top strategies for individual donors to revolutionize their giving and the world. Major gifts may dominate headlines, but the majority of giving still comes from individual households. Even in 2009, at a time of deep recession, individual giving averaged almost $2,000 per household and 82$300 billion donated that same year. Giving 2.0 empowers individual donors of every level navigating the seemingly infinite ways one can give. Based on her vast experience as a philanthropist, academic, and social innovator, Arrillaga-Andreessen shares the most effective techniques she herself pilots and studies. Draws from author's unique experience as founder/chairman of the Stanford Center on Philanthropy and Civil Society, founder/chairman of SV2 (Silicon Valley Social Venture Fund), and faculty member at Stanford Graduate School of Business. Helps individuals harness the power of technology, collaboration, advocacy, and social entrepreneurship to take their giving to the next level. Features dozens of stories on innovative methods of how individuals give time, money, and expertise, showing readers how they can renew their giving and reach their fullest potential. A practical and an inspiring call to action, Giving 2.0 is an indispensable tool for anyone aspiring to create significant change"-

Giving 2.0 : transform your giving and our world

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