325 research outputs found
Expectations, outcomes, and satisfactions.
Dissertation (Ph.D.)--Boston UniversityAmong the many interesting research studies reported in The American Soldier one in particular presented the I.
& E. Division of the U.S. Army with seemingly inexplicable findings. An assumption which most personnel workers blithely make appeared to be proven untenable. It was found that Air Force personnel were much more critical of promotion opportunities than were men in other branches of the Army, despite the fact that objectively the promotion opportunities were far superior in the AAF. This inverse relationship between promotion opportunities and satisfaction with the promotion system is contrary to common sense knowledge, and current practices of personnel workers. The present research, therefore, has attempted to experimentally verily the I. & E. findings and tested several hypotheses from reference group theory. [TRUNCATED
Characterization of optical systems for the ALPS II experiment
ALPS II is a light shining through a wall style experiment that will use the
principle of resonant enhancement to boost the conversion and reconversion
probabilities of photons to relativistic WISPs. This will require the use of
long baseline low-loss optical cavities. Very high power build up factors in
the cavities must be achieved in order to reach the design sensitivity of ALPS
II. This necessitates a number of different sophisticated optical and control
systems to maintain the resonance and ensure maximal coupling between the laser
and the cavity. In this paper we report on the results of the characterization
of these optical systems with a 20 m cavity and discuss the results in the
context of ALPS II
The heterodyne sensing system for the ALPS II search for sub-eV weakly interacting particles
ALPS II, the Any Light Particle Search, is a second-generation Light Shining
through a Wall experiment that hunts for axion-like particles. The experiment
is currently transitioning from the design and construction phase to the
commissioning phase, with science runs expected to start in 2021. ALPS II plans
to use two different sensing schemes to confirm the potential detection of
axion-like particles or to verify an upper limit on their coupling strength to
two photons of . This
paper discusses a heterodyne sensing scheme (HET) which will be the first
scheme deployed to detect the regenerated light. It presents critical details
of the optical layout, the length and alignment sensing scheme, design features
to minimize spurious signals from stray light, as well as several control and
veto channels specific to HET which are needed to commission and operate the
instrument and to calibrate the detector sensitivity.Comment: 12 pages, 5 figure
Citizen Science 2.0 : Data Management Principles to Harness the Power of the Crowd
Citizen science refers to voluntary participation by the general public in scientific endeavors. Although citizen science has a long tradition, the rise of online communities and user-generated web content has the potential to greatly expand its scope and contributions. Citizens spread across a large area will collect more information than an individual researcher can. Because citizen scientists tend to make observations about areas they know well, data are likely to be very detailed. Although the potential for engaging citizen scientists is extensive, there are challenges as well. In this paper we consider one such challenge – creating an environment in which non-experts in a scientific domain can provide appropriate and accurate data regarding their observations. We describe the problem in the context of a research project that includes the development of a website to collect citizen-generated data on the distribution of plants and animals in a geographic region. We propose an approach that can improve the quantity and quality of data collected in such projects by organizing data using instance-based data structures. Potential implications of this approach are discussed and plans for future research to validate the design are described
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