755 research outputs found
Measurement of radiation-pressure-induced optomechanical dynamics in a suspended Fabry-Perot cavity
No full textWe report on experimental observation of radiation-pressure induced effects in a high-power optical cavity. These effects play an important role in next generation gravitational wave (GW) detectors, as well as in quantum non-demolition (QND) interferometers. We measure the properties of an optical spring, created by coupling of an intense laser field to the pendulum mode of a suspended mirror; and also the parametric instability (PI) that arises from the nonlinear coupling between acoustic modes of the cavity mirrors and the cavity optical mode. Specifically, we measure an optical rigidity of K = 3 x 10⁴ N/m, and PI value R = 3.Thomas Corbitt, David Ottaway, Edith Innerhofer, Jason Pelc, and Nergis Mavalval
Thermal Noise in Microfabricated AlGaAs Structures
No full textMultilayer crystalline AlGaAs stacks have the potential to reduce coating thermal noise in future gravitational-wave interferometers. The results of direct measurements of thermal noise in microfabricated AlGaAs structures will be presented
Implementation of ERP system in SMEs
No full textThis thesis tries to propose a list of Critical Success Factors (CSFs) in the form
of CSFs framework for Enterprise Resource Planning (ERP) system
implementation at Small and Medium sized Enterprises (SMEs).The research
describe in this thesis tries to test them by going through the experience of ERP
system implementation in SME called Hazelwood Sound & Vision Ltd (HSV).
In a first instance, the author compared implementation models and suggested
most appropriate model for HSV. Furthermore, literature search for critical
success factors of ERP implementation has taken place. This led to a general
CSFs framework for ERP system implementation. At later stage, CSFs were
classified into the phases of selected implementation model. This resulted in
integrated framework which later used for ERP system implementation called
Smart Office in HSV. Through this experience of implementing Smart Office in
HSV, the author determined factors which were critical for the success of the
ERP implementation in HSV and compared them with CSFs found in literature.
The study also examines, through the critical success factors, the impacts and
issues in implementation related to these factors. Findings include: an
increased emphasis upon the determination of clear goals and objectives at the
project outset, and, importantly, vendor support added value in terms of
specialist software knowledge and enhanced project team capability. Results
show that most of the success factors, found in the literature apply to HSV,
although change management, and communication among departments, don‟t
seems to be regarded as top CSFs for HSV.
Implementation is an expensive investment, and difficult to implement, due to
its complexity. It is hoped that knowledge and understanding of these factors
will assist SMEs in successfully implementing ERP and enable them to further
improve their systems in order to maximize returns. Furthermore, by identifying
relevant CSFs for SMEs, managers can better prioritize implementation efforts
and resources to maximize success of ERP implementations. One of the
outcomes of this research is implementation of Smart Office which fulfils the
business needs of the HSV
Observation of a kilogram-scale oscillator near its quantum ground state
No full textWe introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system—an interferometric gravitational wave detector. The detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) operate within a factor of 10 of the standard quantum limit (SQL), providing a displacement sensitivity of 10<sup>−18</sup> m in a 100 Hz band centered on 150 Hz. With a new feedback strategy, we dynamically shift the resonant frequency of a 2.7 kg pendulum mode to lie within this optimal band, where its effective temperature falls as low as 1.4 μK, and its occupation number reaches about 200 quanta. This work shows how the exquisite sensitivity necessary to detect gravitational waves can be made available to probe the validity of quantum mechanics on an enormous mass scale
An evaluation of Information quality frameworks for the World Wide Web
No full textOver the past few years the amount of data immediately available to the consumer has rapidly increased in size. This is due to the growth of the web as an information exchange and creation environment. Data creation on the Internet is increasing as it gives web publishers the opportunity to publish their content without any standards to govern the content. Although the consumer has access to this abundance of information, the lack of standards has lead to various levels of quality problems. There has been much advancement in Search Engine technology to search through these large amounts of content and to retrieve relevant, quality information. However, not all information returned is relevant to its context and it has become more difficult for the consumer to find quality information due to these information quality issues. Barriers that have been identified with regard to the retrieval of relevant information are the problem of too much information and the quality of that information.This paper therefore address some of the issues of information quality on the web and evaluates a number of frameworks in order to identify common elements, differences and missing elements of such frameworks. A summary of the most common information quality elements is presented as a basis for a more comprehensive view of information quality frameworks available for managing and implementing quality strategies on the web
Gas-particle partitioning of atmospheric Hg(II) and its effect on global mercury deposition
No full textAtmospheric deposition represents a major input of mercury to surface environments. The phase of mercury (gas or particle) has important implications for its removal from the atmosphere. We use long-term observations of reactive gaseous mercury (RGM), particle-bound mercury (PBM), fine particulate matter (PM2.5), and temperature at five sites in North America to derive an empirical gas-particle partitioning relationship log10(K-1) = (10 ± 1) − (2500 ± 300)/T where K = (PBM/PM2.5)/RGM with PBM and RGM in common mixing ratio units, PM2.5 in μg m−3, and T in Kelvin. This relationship is in the range of previous work but is based on far more extensive data from multiple sites. We implement this empirical relationship in the GEOS-Chem global 3-D Hg model to partition divalent mercury (Hg(II)). The resulting gas-phase fraction of Hg(II) ranges from over 90% in warm air with little aerosol to less than 10% in cold air with high aerosol. Hg deposition to high latitudes increases because of more efficient scavenging of particulate Hg(II) by snow. Model comparison to Hg observations at surface sites suggests that subsidence from the free troposphere (warm air, low aerosol) is a major factor driving the seasonality of RGM, while elevated PBM is mostly associated with high aerosol loads. This and other model updates, including the correction of an outstanding algorithm error, to wet deposition improve the simulation of Hg wet deposition fluxes in the US relative to the previous version of the model. The observed wintertime minimum in wet deposition fluxes is attributed to inefficient snow scavenging of gas-phase Hg(II)
Class of 1997, Indiana University School of Law
No full textPictured:
Thaddeus R. Ailes, Kirstie D. Andersen, Sophia J. Atcherson, Amy Marie Bacik, Kyle M. Baker, Paul W. Barada Jr., Robert F. Barron II, Mark D. Batties III, Matthew John Bergstrom, Raynel L. Berry, Craig Boeck, Christopher N. Boles, Peggy Bomberger, Rosemary L. Borek, Mark E. Bovard, Kathy Bradley, Veronica Watford Brame, Daleta D. Briggs, Michele Brown, Jennifer S. Burke, Theodore H. Burmeister, Anne M. Burton, Marshal Lawrence Chaifetz, Patrick Nelson Chastain, James K. Cleland, Roger Colinvaux, Andrea Kelly Collier, James F. Comeaux, Keith R. Conrad, David E. Corbitt, Shawn D. Cox, James E. Crawford, Nicole C. Daniel, Medana C. Davis, Charlene R. Day, James Brian DeShields, Shellie L. Deffendall, Julie R. Dersch, Peter Daniel DiPaola, TuongVan Do, William K. Doss, Eric M. Douthit, Ursula Doye, Peter H. Dykstra, Christopher C. Eades, Heidi K. Ellison, T. R. Eppel, Jose M. Espinosa, Troy D. Farmer, Sandra Fast, Mark G. Fischer, John P. Fischer Jr., Charlene Renee Fisher, Jennifer Marie Fitzgerald, Octavia Florence, Nicholle R. Floyd, Mark T. Freeman, Christian M. Freitag, Mark D. Fridy, David J. B. Froiland, Christopher G. Gaal, Matthew W. Garber, Brett B. Gibson, Shelly S. Gibson, Dominic W. Glover, Heidi Genevieve Goebel, Christopher M. Goff, Linda A. Graft, Matthew T. Hale, Susannah M. Hall-Justice, Farhard A. Hamidi, W. James Hamilton, Marlene R. Hanson, David E. Harris, Holly M. Harvey, Steve Hattenbach, Scott F. Hill, Joseph P. Hill Jr., Kelli J. Hinkle, Steven S. Hoar, Elizabeth A. Hobbs, Julie Hofius, Tania A. Hricik, Julie Rae Hubly, Katherine A. Hunter, Thomas W. Ice Jr., David Harris Iskowich, Cynthia L. Janeway, Michael S. Jeffries, Angela M. Jenkins, Frederick B. Jonassen, Mary Elisabeth Jordan, Lynn Kantor, Brian T. Kay, Jeffrey A. Kehr, John Howard Kenley, Dan Kidd, Megan J. Kight, Ladona E. Knight, Robert L. Konopinski, Carol A. Krause, Scott D. Krohn, Michelle M. Kwon, Jennifer M. Lamie, David Lau, Dale Lavi, Hezron T. K. Lopez, Wendy Lowengrub, Raoul K. Maitra, Ernest W. Marshall Jr., Todd J. Maurer, Lisa Mayfield, John P. McCormick, Aaron E. McCrea, William T. McKay III, Christela Medrano, Jay Meisenhelder, Wendy M. Melone, Gracia-Jean Meyer, Adam L. Mildred, Elizabeth Francesca Miller, Lesley June Miller, Sonia L. Miller, Jacquelyn Fortenberry Moore, Raeanna S. Moore, Angela K. Moorman, Jeremy C. Moritz, Michelle Kok Moritz, Ellen J. Morrison, John M. Mueller, Marla E. Muse, Jeffrey S. Neal, Eric K. Nelson, Frank D. Otte, Chris Palmer, Sean F. Pamintuan, Christopher J. Pappaioanou, Kenneth L. Parker, Julie A. Perkins, Johanna J. Philhower, Regina C. Pierle, Jill E. Pilcher, Stefan J. Poling, Paige Porter, Kevin Christopher Powell, Regina Lynn Hennessy Powers, Misti D. Presnell, Jacqueline Jacques Pugh, E. Zachary Rans, Jason Ruskin Reese, Danielle T. Rifkin, Luis A. Rodriguez, Manish S. Sampat, Jose J. Sanchez, David D. Sanders, Rosann Scattoloni, Sarah E. Scherrer, Aaron A. Schmoll, Jason S. Schnelker, Jill M. Sears, Sandra C. Sheets, Jonathan J. Siebers, Randall W. Sifers, William A. Sikkel IV, Brian M. Simpson, Douglas A. Snyder, Timothy P. Spahr, David A. Suess, Amy E. Sundermeyer, Todd A. Suter, Karen Swopes, Vasilios Tasikas, Jeffrey W. Terry, Monica C. Thurman, Robyn M. Toland, Sara Elizabeth Topolgus, Donna A. Unangst, William C. Underwood, Konrad M. L. Urberg, Julie A. Veach, Sergei Vinogradov, Michael T. Vreeland, Carrie L. Wagner, Jason G. Ward, Scott A. Weires, Mark A. Werling, Brenda L. Wilhelm, Adam P. Williams, Heather L. Wilson, Jered J. Wilson, Giovanna I. Wolf, Jennifer S. Worfel, Molly L. Wright, Norman Andrew Yatooma.
Not pictured: Angelian A. Andrews, Lesley L. Bassam, Chad B. Bechert, Kimberly S. Betz, Brian R. Brown, Philip J. Caviness, David S. Craig, Antony Garza, Matthew R. Heiman, Gretchen S. Heitz, Benjamin L. Jaffe, Christina L. Johnston, Michael B. Jump, Christopher L. Kerr, Dominic D. Martin, Tony E. Mathis, Shawn P. O’Shaughnessy, William A. Plummer, Thomas H. Townsend, Brandon L. Truman, Jennifer A. Tucker, Arthur Jerome Usher IV, Angela B. Wissman, Ming-Chiu Alfred Yie, Frederick Anthony Zirkle.https://www.repository.law.indiana.edu/composite/1074/thumbnail.jp
Constraints from LIGO O3 data on gravitational-wave emission due to r-modes in the glitching pulsar PSR J0537-6910
No full textWe present a search for continuous gravitational-wave emission due to r-modes in the pulsar PSR J0537-6910 using data from the LIGO-Virgo Collaboration observing run O3. PSR J0537-6910 is a young energetic X-ray pulsar and is the most frequent glitcher known. The inter-glitch braking index of the pulsar suggests that gravitational-wave emission due to r-mode oscillations may play an important role in the spin evolution of this pulsar. Theoretical models confirm this possibility and predict emission at a level that can be probed by ground-based detectors. In order to explore this scenario, we search for r-mode emission in the epochs between glitches by using a contemporaneous timing ephemeris obtained from NICER data. We do not detect any signals in the theoretically expected band of 86-97 Hz, and report upper limits on the amplitude of the gravitational waves. Our results improve on previous amplitude upper limits from r-modes in J0537-6910 by a factor of up to 3 and place stringent constraints on theoretical models for r-mode driven spin-down in PSR J0537-6910, especially for higher frequencies at which our results reach below the spin-down limit defined by energy conservation
Class of 1997, Indiana University School of Law
No full textPictured:
Thaddeus R. Ailes, Kirstie D. Andersen, Sophia J. Atcherson, Amy Marie Bacik, Kyle M. Baker, Paul W. Barada Jr., Robert F. Barron II, Mark D. Batties III, Matthew John Bergstrom, Raynel L. Berry, Craig Boeck, Christopher N. Boles, Peggy Bomberger, Rosemary L. Borek, Mark E. Bovard, Kathy Bradley, Veronica Watford Brame, Daleta D. Briggs, Michele Brown, Jennifer S. Burke, Theodore H. Burmeister, Anne M. Burton, Marshal Lawrence Chaifetz, Patrick Nelson Chastain, James K. Cleland, Roger Colinvaux, Andrea Kelly Collier, James F. Comeaux, Keith R. Conrad, David E. Corbitt, Shawn D. Cox, James E. Crawford, Nicole C. Daniel, Medana C. Davis, Charlene R. Day, James Brian DeShields, Shellie L. Deffendall, Julie R. Dersch, Peter Daniel DiPaola, TuongVan Do, William K. Doss, Eric M. Douthit, Ursula Doye, Peter H. Dykstra, Christopher C. Eades, Heidi K. Ellison, T. R. Eppel, Jose M. Espinosa, Troy D. Farmer, Sandra Fast, Mark G. Fischer, John P. Fischer Jr., Charlene Renee Fisher, Jennifer Marie Fitzgerald, Octavia Florence, Nicholle R. Floyd, Mark T. Freeman, Christian M. Freitag, Mark D. Fridy, David J. B. Froiland, Christopher G. Gaal, Matthew W. Garber, Brett B. Gibson, Shelly S. Gibson, Dominic W. Glover, Heidi Genevieve Goebel, Christopher M. Goff, Linda A. Graft, Matthew T. Hale, Susannah M. Hall-Justice, Farhard A. Hamidi, W. James Hamilton, Marlene R. Hanson, David E. Harris, Holly M. Harvey, Steve Hattenbach, Scott F. Hill, Joseph P. Hill Jr., Kelli J. Hinkle, Steven S. Hoar, Elizabeth A. Hobbs, Julie Hofius, Tania A. Hricik, Julie Rae Hubly, Katherine A. Hunter, Thomas W. Ice Jr., David Harris Iskowich, Cynthia L. Janeway, Michael S. Jeffries, Angela M. Jenkins, Frederick B. Jonassen, Mary Elisabeth Jordan, Lynn Kantor, Brian T. Kay, Jeffrey A. Kehr, John Howard Kenley, Dan Kidd, Megan J. Kight, Ladona E. Knight, Robert L. Konopinski, Carol A. Krause, Scott D. Krohn, Michelle M. Kwon, Jennifer M. Lamie, David Lau, Dale Lavi, Hezron T. K. Lopez, Wendy Lowengrub, Raoul K. Maitra, Ernest W. Marshall Jr., Todd J. Maurer, Lisa Mayfield, John P. McCormick, Aaron E. McCrea, William T. McKay III, Christela Medrano, Jay Meisenhelder, Wendy M. Melone, Gracia-Jean Meyer, Adam L. Mildred, Elizabeth Francesca Miller, Lesley June Miller, Sonia L. Miller, Jacquelyn Fortenberry Moore, Raeanna S. Moore, Angela K. Moorman, Jeremy C. Moritz, Michelle Kok Moritz, Ellen J. Morrison, John M. Mueller, Marla E. Muse, Jeffrey S. Neal, Eric K. Nelson, Frank D. Otte, Chris Palmer, Sean F. Pamintuan, Christopher J. Pappaioanou, Kenneth L. Parker, Julie A. Perkins, Johanna J. Philhower, Regina C. Pierle, Jill E. Pilcher, Stefan J. Poling, Paige Porter, Kevin Christopher Powell, Regina Lynn Hennessy Powers, Misti D. Presnell, Jacqueline Jacques Pugh, E. Zachary Rans, Jason Ruskin Reese, Danielle T. Rifkin, Luis A. Rodriguez, Manish S. Sampat, Jose J. Sanchez, David D. Sanders, Rosann Scattoloni, Sarah E. Scherrer, Aaron A. Schmoll, Jason S. Schnelker, Jill M. Sears, Sandra C. Sheets, Jonathan J. Siebers, Randall W. Sifers, William A. Sikkel IV, Brian M. Simpson, Douglas A. Snyder, Timothy P. Spahr, David A. Suess, Amy E. Sundermeyer, Todd A. Suter, Karen Swopes, Vasilios Tasikas, Jeffrey W. Terry, Monica C. Thurman, Robyn M. Toland, Sara Elizabeth Topolgus, Donna A. Unangst, William C. Underwood, Konrad M. L. Urberg, Julie A. Veach, Sergei Vinogradov, Michael T. Vreeland, Carrie L. Wagner, Jason G. Ward, Scott A. Weires, Mark A. Werling, Brenda L. Wilhelm, Adam P. Williams, Heather L. Wilson, Jered J. Wilson, Giovanna I. Wolf, Jennifer S. Worfel, Molly L. Wright, Norman Andrew Yatooma.
Not pictured: Angelian A. Andrews, Lesley L. Bassam, Chad B. Bechert, Kimberly S. Betz, Brian R. Brown, Philip J. Caviness, David S. Craig, Antony Garza, Matthew R. Heiman, Gretchen S. Heitz, Benjamin L. Jaffe, Christina L. Johnston, Michael B. Jump, Christopher L. Kerr, Dominic D. Martin, Tony E. Mathis, Shawn P. O’Shaughnessy, William A. Plummer, Thomas H. Townsend, Brandon L. Truman, Jennifer A. Tucker, Arthur Jerome Usher IV, Angela B. Wissman, Ming-Chiu Alfred Yie, Frederick Anthony Zirkle.https://www.repository.law.indiana.edu/composite/1074/thumbnail.jp
Erratum: All-sky search for gravitational-wave bursts in the first joint LIGO-GEO-Virgo run (Physical Review D - Particles, Fields, Gravitation and Cosmology (2010) 81 (102001))
No full textThis paper was published online on 5 May 2010 with an omission in the Collaboration author list. S. Dwyer has been
added as of 12 April 2012. The Collaboration author list is incorrect in the printed version of the journal
- …
