Author name code: bruning ADS astronomy entries on 2022-09-14 author:"Bruning, David H." ------------------------------------------------------------------------ Title: Teaching Your First Astro 101 Course: What They Don't Tell You Authors: Bruning, D. Bibcode: 2014ASPC..483...57B Altcode: Designing your Astro 101 course should not be about what topics you can omit but should be a thoughtful process that regards your fundamental teaching goals and which topics and skills promote those goals. Establishing goals and assessments that lead to measurable student outcomes enable one to more constructively design a learning experience for students. Just as any good novel has multiple story lines that weave throughout the book, your course has several narratives that wind through different topics and help to tie goals together. Sharing this underlying organizational structure of your course with students helps them to connect ideas and be more successful. Title: Learning and the Net Generation Authors: Duncan, D. K.; Rudolph, A. L.; Bruning, D. Bibcode: 2014ASPC..483...47D Altcode: Most instructors believe that GPA, ethnicity, native English speaking ability, class year, family income, and whether parents have a college degree are important indicators of student success in Astro 101. Research shows, however, that the single most important factor in student learning is interactivity in the classroom. While

new electronic media may have some important uses, research shows that electronic device usage in the classroom by students can negatively impact their course grades by as much five percent. Title: Tricks of the Trade: Effective Classroom Management (An Open Microphone Session) Authors: Slater, T.; Bruning, D. Bibcode: 2011ASPC..443...29S Altcode: To close the Cosmos in the Classroom meeting, we want to share effective ways to help our students (and ourselves) to succeed in our classes, by setting the right course guidelines about in-class and out-of-class behavior. What ways of helping students to become adult learners and responsible members of the college community have been most effective for you? What have you learned from colleagues in your and other disciplines that could help everyone at the session work with 21st century students in our evolving universe of classroom and home technology? Title: Differential Rotation in Solar-type Spectra Authors: Bruning, David H. Bibcode: 2009AAS...21443302B Altcode: A continuing effort has developed a disk-integration model to study the effects of differential rotation and surface convection in the spectrum of sun-like stars (e.g., BAAS 38, 915, 2007; BAAS 40, 203, 2008). This poster extends the analysis to fast and slow rotators (previously limited v sin i from 2 to 6 km/s), a larger range in inclination, and non-solar convective line shifts. The pseudo-power spectrum is explored further as a diagnostic tool. Title: Readability Analysis of Introductory Astronomy Textbooks Authors: Bruning, David H. Bibcode: 2008AAS...212.4006B Altcode: 2008BAAS...40Q.241B Increasingly, first-year students have reading deficiencies and do not have the academic discipline to read introductory textbooks. Few students have the skills needed to organize ideas elicited from texts, and even fewer seem capable of evaluating ideas and concepts as to importance. While the amount of pedagogical support has increased in introductory astronomy texts in recent years, it is worthwhile to investigate how the readability of these books has changed with time.

Dukes and co-authors (1979, 1980, 1983) surveyed numerous introductory astronomy textbooks using the Flesch Readability index. For a direct comparison to Dukes' work, I have used Flesch's index to survey three groups of introductory astronomy texts. Group I samples editions from Dukes' surveys to normalize the current survey and to provide a text baseline from 25 years ago, while group II includes texts from the 1940s and 1950s and group III current texts to compare the readability of present texts with those from previous decades.

At first glance, this study indicates that texts have not changed in readability over the past several decades. However, other issues arise when the results are investigated in detail. Flesch measures readability but not understandability; understandability may have changed. Reading load has increased as texts have increased in size from 478 to 605 pages, on average. While texts may have a grade 11-12 reading level, that is an average and parts of texts soar to post-graduate reading levels; the ups and downs may affect student comprehension. Readability is just one measure for analyzing texts and these other issues may be more important for judging why our students have difficulty reading introductory astronomy books. Title: Signatures of Differential Rotation in Solar-type Spectra Authors: Bruning, David H. Bibcode: 2008AAS...212.1101B Altcode: 2008BAAS...40..203B Bruning (BAAS 38, 915, 2007) reported on the effects of surface convection on the Fourier signal of differential rotation in the solar spectrum. The Fourier signal of medium-strength lines is not well matched unless the effects of surface convection are included. This paper extends the analysis to a range of parameters such as v sin i, limb darkening, amount of differential rotation, and convective shifts. This grid of models should help establish for observers whether differential rotation is discernible in late-type stellar spectra.

This work was supported in part by the Wisconsin Space Grant Consortium. Title: Signatures of Differential Rotation in Solar-type Spectra Authors: Bruning, David H. Bibcode: 2007AAS...21110304B Altcode: 2007BAAS...39Q.920B Bruning (BAAS 38,915,2007) reported on the effects of surface convection on the Fourier signal of differential rotation in the solar spectrum. This paper extends the analysis to a range of parameters such as v sin i, limb darkening, amount of differential rotation, and convective shifts. This grid of models should help establish for observers whether differential rotation is discernible in late-type stellar spectra.

This work was supported in part by the Wisconsin Space Grant Consortium. Title: Survey of Introductory Astrophysics Textbooks Authors: Bruning, David Bibcode: 2007AEdRv...6...80B Altcode: No abstract at ADS Title: Survey of Introductory Astrophysics Textbooks Authors: Bruning, David Bibcode: 2007AEdRv...6a..80B Altcode: Although Bruning has produced a series of textbook surveys for introductory astronomy for non science majors, the present survey is the first to examine introductory astrophysics books intended for astronomy majors. It provides information about 21 introductory astrophysics textbooks: nine broad topic texts, two on techniques, three on the Solar System, one on galaxies and cosmology, and six on stars. A set of seven tables indicates prices, page counts by topics, pedagogical features of the text, appendixes, and text Web sites to help instructors narrow the list of textbooks for closer inspection as they make adoption decisions. Title: SABER: The Searchable Annotated Bibliography of Education Research in Astronomy Authors: Bruning, David H.; Bailey, J. M.; Brissenden, G. Bibcode: 2006AAS...20921302B Altcode: 2006BAAS...38.1194B Starting a new research project in astronomy education is hard because the literature is scattered throughout many journals. Relevant astronomy education research may be in psychology journals, science education journals, physics education journals, or even in science journals themselves. Tracking the vast realm of literature is difficult, especially since libraries do not carry many of these journals and related abstracting services.

SABER is an online resource (http://astronomy.uwp.edu/saber/) that was started in 2001 specifically to reduce this “scatter” by compiling into one place an annotated bibliography of relevant education research articles. The database now includes more than 150 articles specifically addressing astronomy education research. Visit SABER and see what it can do for you. Title: Differential Rotation in Solar-type Stars Authors: Bruning, David H. Bibcode: 2006AAS...209.1402B Altcode: 2006BAAS...38..915B Stellar dynamos require differential rotation. Recent observations by Reiners (A&A 446, 267, 2006) showed the presence of differential rotation in 28 of 147 stars of spectral type F and hotter. Yet, the observational signature of differential rotation in solar-type stars remains elusive, largely because of the smaller magnitude of differential rotation in cooler stars. This paper looks at the effect of surface convection on the Fourier signal of differential rotation and seeks the known signature of differential rotation in the solar flux spectrum.

This research has been supported in part by the Wisconsin Space Grant Consortium. Title: SABER: The Searchable Annotated Bibliography of Education Research in Astronomy Authors: Bruning, David; Bailey, Janelle M.; Brissenden, Gina Bibcode: 2006AEdRv...5..177B Altcode: No abstract at ADS Title: Survey of Introductory Astronomy Textbooks: An Update Authors: Bruning, David Bibcode: 2006AEdRv...5..182B Altcode: No abstract at ADS Title: Education Matters: Practicing What We Preach Authors: Bruning, David Bibcode: 2006Mercu..35b..11B Altcode: No abstract at ADS Title: 2006 Survey of Introductory Astronomy Textbooks Authors: Bruning, David Bibcode: 2006AEdRv...4b...5B Altcode: Keeping track of current astronomy textbooks is never easy. New editions come frequently, and occasionally books are discontinued. Ancillary materials and publisher Web sites change as well. This survey of introductory astronomy textbooks is intended to help college instructors of "Astronomy 101" select the text for their course. This survey tabulates prices, page counts by topics, pedagogical features of the text, appendixes, Web sites for the texts, and ancillary materials to help instructors narrow the list of textbooks for closer inspection as they make adoption decisions. For instructors who want to try something different, perhaps for a special topics class or a shortened semester, a list of alternative texts is included. Title: Survey of Introductory Astronomy Textbooks: An Update Authors: Bruning, David Bibcode: 2006AEdRv...5b.182B Altcode: The "2006 Survey of Introductory Astronomy Textbooks" had some inconsistencies and incompleteness in the tables for ancillary and supplementary materials. This update includes revision of those tables plus updated entries for 10 of the two dozen textbooks surveyed. Title: SABER: The Searchable Annotated Bibliography of Education Research in Astronomy Authors: Bruning, David; Bailey, Janelle M.; Brissenden, Gina Bibcode: 2006AEdRv...5b.177B Altcode: Starting a new research project can be a challenge, but especially so in education research because the literature is scattered throughout many journals. Relevant astronomy education research may be in psychology journals, science education journals, physics education journals, or even in science journals. Tracking the vast realm of literature is difficult, especially because libraries frequently do not subscribe to many of the relevant journals and abstracting services. The Searchable Annotated Bibliography of Education Research (SABER) is an online resource that was started to service the needs of the astronomy education community, specifically to reduce this "scatter" by compiling an annotated bibliography of education research articles in one electronic location. Although SABER started in 2001, the database has a new URL—http://astronom- y.uwp.edu/saber/—and has recently undergone a major update. Title: 2006 Survey of Introductory Astronomy Textbooks Authors: Bruning, David Bibcode: 2006AEdRv...4b..54B Altcode: 2005AEdRv...4b..54B Keeping track of current astronomy textbooks is never easy. New editions come frequently, and occasionally books are discontinued. Ancillary materials and publisher Web sites change as well. This survey of introductory astronomy textbooks is intended to help college instructors of "Astronomy 101" select the text for their course. This survey tabulates prices, page counts by topics, pedagogical features of the text, appendixes, Web sites for the texts, and ancillary materials to help instructors narrow the list of textbooks for closer inspection as they make adoption decisions. For instructors who want to try something different, perhaps for a special topics class or a shortened semester, a list of alternative texts is included. Title: Education Matters, What Is It We Teach Authors: Bruning, David Bibcode: 2006Mercu..35a..11B Altcode: No abstract at ADS Title: Assessing Thinking Skills in Astro 101: Do We Make an Impact? Authors: Bruning, D. Bibcode: 2005AAS...207.2701B Altcode: 2005BAAS...37.1208B Most instructors agree that a major goal of "Astronomy 101" is to develop thinking skills in our students (Partridge and Greenstein, AER 2, 46, 2003). Much educational research in astronomy has initially concentrated on "best practices" for improving student learning (development of "think-pair-share", lecture tutorials, peer tutoring, etc.). Little has been done to date to assess our efforts to improve student thinking skills and students' desire to think more deeply about the cognitively rich ideas offered in the typical astronomy class.

This study surveys several astronomy and physics courses to determine whether general analytical thinking skills increase because of the science course and whether students' attitudes toward cognition improve. Cacioppo, Petty and Kao's "Need for Cognition" scale is used for the latter assessment (J. Personality Assessment 48, 306, 1984). A shortened version of Whimbey and Lochhead's ASI skills instrument is used to assess analytical skills ("Problem Solving and Comprehension," 1986).

Preliminary results suggest that students need for cognition does not change in general, although there may be a correlation between increasing need for cognition and improvement in grades through the semester. There is a suggestion that need for cognition is slightly predictive of course performance, but a greater correlation exists between the post-course survey and grades. Gains in general analytical skills have been seen in initial surveys, but correlations with course performance appear elusive. Title: 2006 Survey of Introductory Astronomy Textbooks Authors: Bruning, David Bibcode: 2005AEdRv...4...54B Altcode: No abstract at ADS Title: Education Matters: Confessions of an Astronomy Heretic Authors: Bruning, David Bibcode: 2005Mercu..34e..11B Altcode: No abstract at ADS Title: SABER: A Searchable Annotated Bibliography of Education Research in Astronomy Authors: Brissenden, G.; Bruning, D. H.; Slater, T. F. Bibcode: 2002AAS...200.1301B Altcode: 2002BAAS...34..660B One of the greatest challenges in surveying the existing literature in astronomy education research is that it is spread across tens of journals. Currently, astronomy education research articles appear in the journals primarily servicing science education, science teaching, teacher education, curriculum and instruction, cognitive science, and informal education. Indeed, it is this lack of a central place for publishing the results of astronomy education research that has motivated, in part, the creation of the new electronic astronomy education journal, Astronomy Education Review (AER). In a concerted effort to collect, summarize, and make more accessible the widely dispersed knowledge-base of astronomy education research, members of the AAS Working Group on Astronomy Education have volunteered to sift through 35 journals and identify all articles from 1970 to the present that are relevant to astronomy education. For our purposes, relevant astronomy education research articles are those refereed papers that describe quantitative and qualitative research methods and results about teaching, learning, and assessment in astronomy and space science. The group has collaboratively created an annotated bibliography that summarizes these articles in an online database that is electronically searchable. Here we present the annotated bibliography to the astronomical community, provide additional background information on its contents, and give information on how to access the database online. Initial funding for the programming and design of the search engine was provided, in part, by the Wisconsin Space Grant Consortium and the American Astronomical Society. Title: 2002 Survey of Introductory Astronomy Textbooks Authors: Bruning, David Bibcode: 2002AEdRv...1a..92B Altcode: This is the fourth annual survey of introductory astronomy textbooks, started in 1997. This guide is intended to help college instructors of Astronomy 101 select the text for their course. Title: Development of a Comprehensive Online Annotated Bibliography of Astronomy Education Research Authors: Brissenden, G.; Bruning, D. H.; Slater, T. F. Bibcode: 2001AAS...199.4804B Altcode: 2001BAAS...33.1371B One of the greatest challenges in surveying the existing literature in astronomy education research is that it is spread across tens of journals. Currently, astronomy education research articles appear in the journals primarily servicing science education, science teaching, teacher education, curriculum and instruction, cognitive science, and informal education. Indeed, it is this lack of a central place for publishing the results of astronomy education research that has motivated, in part, the creation of a new electronic astronomy education journal, Astronomy Education Review (AER). In a concerted effort to collect, summarize, and make more accessible the widely dispersed knowledge-base of astronomy education research, members of the AAS Working Group on Astronomy Education have volunteered to sift through 35 journals and identify all articles from 1970 to the present that are relevant to astronomy education. For our purposes, relevant astronomy education research articles are those refereed papers that describe quantitative and qualitative research methods and results about teaching, learning, and assessment in astronomy and space science. The group has collaboratively created an annotated bibliography that summarizes these articles in an online database that is electronically searchable. Here we present the annotated bibliography to the astronomical community, provide additional background information on its contents, and give information on how to access the database online. Initial funding for the programming and design of the search engine was provided, in part, by the Wisconsin Space Grant Consortium and the American Astronomical Society. Title: 2002 Survey of Introductory Astronomy Textbooks Authors: Bruning, David Bibcode: 2001AEdRv...1...92B Altcode: No abstract at ADS Title: Stellar graveyard. Authors: Bruning, D. Bibcode: 1996Ast....24...44B Altcode: Hubble Space Telescope has found dozens of burned-out stars in the globular cluster M4. Title: Students in cyberspace. Authors: Bruning, D. Bibcode: 1995Ast....23...48B Altcode: Telescopes, planetaria, museums, and even NASA are just a mouse-click away from teachers and pupils in the high-tech classrooms of the '90s. Title: Sunrise on the Moon. Authors: Bruning, D.; Talcott, R. Bibcode: 1995Ast....23R..76B Altcode: Simple astronomical computing can tell where the Sun is rising on the Moon, throwing lunar features into sharp relief. Title: Astronomy's future: Dusk or dawn? Authors: Bruning, D. Bibcode: 1995Ast....23...40B Altcode: With money quickly drying up, astronomers face tough choices on what telescopes to keep open. Title: Blasting along the InfoBahn. Authors: Bruning, D. Bibcode: 1995Ast....23...74B Altcode: A guide to Internet for armchair and backyard astronomers. Title: Mission to planet Earth. Authors: Bruning, D. Bibcode: 1995Ast....23Q..44B Altcode: Radar images from space are used to study changes in structures on Earth's surface. Title: A galaxy of news. Authors: Bruning, D. Bibcode: 1995Ast....23f..40B Altcode: Latest surprises from ground and space are presented. Title: Build your own 10-inch PortaScope. Part 1. Authors: Bruning, D. Bibcode: 1995Ast....23...80B Altcode: The author gives step-by-step instructions for building a mid-sized scope that breaks apart for easy transport. Title: Astronomy books for kids. Authors: Bruning, D. Bibcode: 1994Ast....22...78B Altcode: No abstract at ADS Title: Test your scope's optics. Authors: Bruning, D. Bibcode: 1994Ast....22...56B Altcode: The author gives a help how to use a star at night - or an easy-to-build artificial star - to evaluate the performance of your telescope. Title: Clementine maps the Moon. Authors: Bruning, D. Bibcode: 1994Ast....22R..36B Altcode: New images from the Clementine spacecraft are helping astronomers construct the first accurate map of the Moon's surface and its mineralogy. Title: All eyes on the comet crash. Authors: Bruning, D. Bibcode: 1994Ast....22...40B Altcode: Comet 1993e Shoemaker-Levy 9 is beeing expected to smash into Jupiter. Title: Hubble better than new. Authors: Bruning, D. Bibcode: 1994Ast....22d..44B Altcode: Hubble's vision is sharper than anyone dared hope. Title: Fixing Hubble. NASA sends in the repair crew. Authors: Bruning, D. Bibcode: 1994Ast....22Q..36B Altcode: No abstract at ADS Title: November's Colorful Eclipse Authors: Bruning, D. Bibcode: 1994Ast....22d..68B Altcode: No abstract at ADS Title: The many faces of planetary nebulae. Authors: Bruning, D. Bibcode: 1994Ast....22...94B Altcode: The author presents photographs of planetary nebulae which could be observed with small or medium-sized telescopes. Title: Charting a path through the night sky. Authors: Bruning, D. Bibcode: 1993Ast....21...74B Altcode: Observing guides, observing handbooks, almanacs, and atlases for the amateur astronomer are presented. Title: Neon nova. Authors: Bruning, D. Bibcode: 1993Ast....21g..36B Altcode: No abstract at ADS Title: Seeing a star's surface. Authors: Bruning, D. Bibcode: 1993Ast....21j..34B Altcode: Astronomers use a star's rotation to unveil its features like starspots, magnetic fields, and other stellar activity. Title: Lost and found: pulsar planets. Authors: Bruning, D. Bibcode: 1992Ast....20f..36B Altcode: No abstract at ADS Title: Three nights on Kitt Peak. Authors: Bruning, D. Bibcode: 1992Ast....20d..38B Altcode: No abstract at ADS Title: Desperately seeking Jupiters. Authors: Bruning, D. Bibcode: 1992Ast....20...36B Altcode: Planets should be a natural by-product of the formation of single stars. But in spite of intensive searching, astronomers have yet to find planets around Sun-like stars. Title: One Day on the Sun Authors: Bruning, D. Bibcode: 1992Ast....20...48B Altcode: No abstract at ADS Title: Determining the Earth-Moon distance Authors: Bruning, David H. Bibcode: 1991AmJPh..59..850B Altcode: No abstract at ADS Title: Mean Magnetic Field as a Tracer of Differential Rotation in Late-Type Dwarfs Authors: Bruning, David H. Bibcode: 1991PASP..103..368B Altcode: Subsets of the solar mean-magnetic-field measurements have been studied to determine the conditions for which a solar-type differential rotation signal may be seen in stellar observations. Stellar differential rotation may be detected from mean-magnetic-field measurements if: (1) the number of observations is relatively high; (2) the noise level is less than roughly 25 percent of the maximum field strength value; and (3) the sign of the magnetic field has been determined. The combination of synoptic polarization measurements with those of Zeeman broadening may permit the detection of stellar differential rotation. Title: Line Asymmetries in G and K Dwarfs - Dependence on Spectral Type and Activity Authors: Saar, Steven H.; Bruning, David H. Bibcode: 1990ASPC....9..168S Altcode: 1990csss....6..168S Observations of photospheric line asymmetries in 12 G and 11 K dwarfs, particularly the Fe I 6151.62 A line, are examined to determine the amplitudes and shapes of the bisectors. Bisector shapes are compared for magnetically inactive and active stars, and correlations between the slope and the stellar angular velocity are investigated. G stars have increasingly negative slopes with larger stellar angular velocity while K-star slopes become more positive, an effect which is shown to be consistent with recent hydrodynamical models. Title: Rotational Enhancement of Line Asymmetries in F9-G2 Dwarfs Authors: Bruning, David H.; Saar, Steven H. Bibcode: 1990ASPC....9..165B Altcode: 1990csss....6..165B Disk integration of solar intensity profiles suggests that rotation enhances intermediate strength line asymmetries up to v sin i of about 6 km/s, after which the slope of the line bisector remains constant. Observed stellar line profiles do not show such a simple relation. Fast rotators exhibit large variations, owing presumably to stellar activity. Caution is advised with respect to the use of slow rotating or inactive star line profiles to determine the broadening of faster rotators. Title: Line Asymmetries in G and K Dwarfs Authors: Bruning, D. H.; Saar, S. H. Bibcode: 1989BAAS...21.1116B Altcode: No abstract at ADS Title: Line Asymmetries in Late-Type Dwarf Photospheres Authors: Bruning, D. H.; Saar, S. H. Bibcode: 1989ASIC..263..145B Altcode: 1989ssg..conf..145B No abstract at ADS Title: Mass and Energy Flow Near Sunspots - Part Two Authors: Nye, Alan; Bruning, David; Labonte, Barry J. Bibcode: 1988SoPh..115..251N Altcode: Sunspots block the flow of energy to the solar surface. The blocked energy heats the volume beneath the spot, producing a pressure excess which drives an outflow of mass. Linear numerical models of the mass and energy flow around spots were constructed to estimate the predictions of this physical picture against the observed properties of sunspot bright rings and moat flows. The width of the bright ring and moat are predicted to be proportional to the depth of the spot penumbra, in conflict with the observed proportionally of the moat width to the spot diameter. Postulating that spot depths are proportional to spot diameters would bury the moat flow too deeply to be observed, because the radial velocity at the surface is found to be inversely proportional to the depth of the spot penumbra. The radial velocity at the surface is of order a few hundred meters per second after 1 day, in agreement with the observed excess of moat velocities over supergranule velocities. Title: Spectral Line Asymmetries in Late-type Dwarf Photospheres Authors: Bruning, D. H.; Saar, S. H. Bibcode: 1988BAAS...20..696B Altcode: No abstract at ADS Title: Magnetic Fields on K and M Dwarfs Authors: Bruning, David H.; Chenoweth, Richard E.; Marcy, Geoffrey W. Bibcode: 1987LNP...291...36B Altcode: 1987csss....5...36B; 1987LNP87.291...36B Of seven late K and early M dwarfs, six were observed to have magnetic fields. No relationship was seen between effective temperature and either field strength or filling factor. Magnetic flux was observed not to be constant over this range of effective temperature. Title: Stellar Differential Rotation - A Solar Analog Authors: Bruning, D. H. Bibcode: 1986BAAS...18..981B Altcode: No abstract at ADS Title: Sunspot Blocking and Energy Storage in the Convection Zone Authors: Nye, A. H.; Labonte, B. J.; Bruning, D. H. Bibcode: 1985BAAS...17..895N Altcode: No abstract at ADS Title: Variations of the Asymmetry of Disk Integrated Solar Line Profiles Authors: Bruning, D. H.; Labonte, B. Bibcode: 1985SoPh...97....1B Altcode: Mean line bisector positions were found for the neutral iron line at γ 5250.2 using disk-integrated sunlight. After correction for the apparent time variation of the instrumental profile, it was found that the mean bisector position was constant during the period from May 1982 to February 1983. Title: Heat and Mass Flow Around Sunspots Authors: Bruning, D. H.; Labonte, B. J. Bibcode: 1985BAAS...17Q.611B Altcode: No abstract at ADS Title: The applicability of the Fourier convolution theorem to the analysis of late-type stellar spectra Authors: Bruning, D. H. Bibcode: 1984ApJ...281..830B Altcode: It is shown using observed solar flux and intensity line profiles that explicit disk integration is more accurate than the Fourier convolution method for the analysis of late-type stellar spectra. The convolution method systematically underestimates or overestimates the line broadening depending upon line strength and incorrectly estimates the line depth. This failure of the convolution method is due to the center-to-limb variation of the line shape across the stellar disk. It is shown, however, that the convolution method is an appropriate approximation for analyzing the spectra of fast rotators as long as rotation is the dominant line-broadening mechanism. Rotational zeros were found for two weak lines leading to a solar rotational velocity of 1.85 + or - 0.1 km/s. These zeros are not visible unless the signal-to-noise ratio is greater than 1000, demonstrating the extreme difficulty of obtaining unique rotational signals from line-profile analysis of late-type stars. Title: Magnetic field observations of evolved stars. Authors: Marcy, G. W.; Bruning, D. H. Bibcode: 1984ApJ...281..286M Altcode: A search has been made for Zeeman broadening in high resolution spectra of eight G and K type, evolved stars which have active chromospheres and coronae. No Zeeman broadening was found. It is likely that the fraction of the stellar surface that contains magnetic fields is similar in active giants and dwarfs, based on their comparable chromospheric line strengths and plage surface brightnesses (deduced from Mg II/C IV ratios) and on their comparable requirements for coronal confinement. Thus, since Zeeman broadening is detectable on active dwarfs, the nondetections of Zeeman broadening on these evolved stars are probably due to systematically lower field strengths. That the lower field strengths do not result in lower chromospheric surface brightnesses on giants is consistent with the theoretial 'slow mode' MHD wave generation rates of Ulmschneider and Stein (1982). The low field strengths can be explained by requiring that the fields be in equipartition with either the thermal or turbulent energy densities, both of which are reduced in late-type evolved stars compared with the sun. Title: Solar Line Asymmetry Variations Authors: Bruning, D. H. Bibcode: 1984BAAS...16..730B Altcode: No abstract at ADS Title: Limb darkening variations. Authors: Bruning, D. H. Bibcode: 1984NASCP2310..165B Altcode: 1984siva.work..165B Variations of the solar limb darkening as measured in the line wing of the Fe I line at λ5250 have been observed at Mount Wilson Observatory. The measurements were made over the visible solar disk excluding those points where the magnetic field strength exceeded 5 Gauss. This exclusion of magnetic points should reduce the effects of faculae upon the derived limb darkening curve. The observations cover 160 days during 1980 and show evidence of variations of 0.002 I0 over timescales of thirty days. Title: Solar irradiance variations on active region time scales. Proceedingsof a workshop held at the California Institute of Technology, Pasadena, California, June 20 - 21, 1983. Authors: Labonte, B. J.; Chapman, G. A.; Hudson, H. S.; Willson, R. C.; Newkirk, G. A., Jr.; Bruning, D. H. Bibcode: 1984sivo.book.....L Altcode: No abstract at ADS Title: Integrated Light Observations of the Asymmetry of the λ5250 Line Authors: Bruning, D. H.; Labonte, B. J. Bibcode: 1984ssdp.conf..338B Altcode: A search for temporal variations in the asymmetry of the Fe I λ5250 solar flux profile has been started at Mount Wilson Observatory. A preliminary analysis has indicated that the mean line bisector position has shifted towards the red by 0.2 mÅ from May to December of 1982. This is aproximately the shift expected if one extrapolates the shift seen by Livingston from May 1980 to September 1981.