Filters: Collection: "ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 476 |
 |
Stringfellow, Gerald B. | Effects of V/III ratio on ordering in GaInP: atomic scale mechanisms | Ga0.5In0.5P layers have been grown by organometallic vapor-phase epitaxy using various values of input V/III ratio for two phosphorus precursors, phosphine, the conventional precursor, and tertiarybutylphosphine (TBP), a newly developed, less-hazardous precursor. For growth on nominally (001) GaAs s... | Photoabsorption spectroscopy; Transmission electron diffraction; Phosphorus precursor | 1996-05-01 |
| 477 |
 |
Vardeny, Zeev Valentine | Experimental determination of the charge/neutral branching ratio η in the photoexcitation of ∏-conjugated polymers by broadband ultrafast spectroscopy | We demonstrate a long-sought reliable method for determining the important branching ratio η between photogenerated charged polarons and neutral excitons in ∏-conjugated polymer films and solutions, using femtosecond transient photomodulation spectroscopy with broad spectral range from 0.14 to ... | pi-conjugated polymers; Charge/neutral branching ratio; Photoexcitation; nu value; Broadband ultrafast spectroscopy | 2007-02 |
| 478 |
 |
Sokolsky, Pierre | Highest-energy cosmic rays | What in the cosmos can possibly be accelerating protons to 1020 electron volts and beyond? And how can they preserve such extreme energies while plowing through the cosmic microwave background on their way to us? | Energy spectrum; GZK cutoff; Atmospheric fluorescence | 1998 |
| 479 |
 |
Hansen, Charles D.; Hollerbach, John M. | Improved calibration Framework for electromagnetic tracking devices | Electromagnetic trackers have many favorable characteristics but are notorious for their sensitivity to magnetic field distortions resulting from metal and electronic equipment in the environment. We categorize existing tracker calibration methods and present an improved technique for reducing stati... | Electromagnetic tracking; Tracking devices | 2001 |
| 480 |
 |
Rogers, Alan R.; Harpending, Henry C. | Mismatch distributions of mtDNA reveal recent human population expansions | Although many genetic studies of human evolution have tried to make distinctions between the replacement and the multiregional evolution hypotheses, current methods and data have not resolved the issue. However, new advances in nucleotide divergence theory can complement these investigations with a ... | 1994 | |
| 481 |
 |
Martin, Jim | No differences in cycling efficiency between world-class and recreational cyclists | The aim of this experiment was to compare the efficiency of elite cyclists with that of trained and recreational cyclists. Male subjects (N =69)performed an incremental exercise test to exhaustion on an electrically braked cycle ergometer. Cadence was maintained between 80-90rpm. | Gross efficiency; Delta efficiency; Cycling efficiency; Economy; VO2peak | 2004 |
| 482 |
 |
Sokolsky, Pierre | Observation of the suppression of the flux of cosmic rays above 4×10^19eV | The energy spectrum of cosmic rays above 2.5 x 10^18 eV, derived from 20 000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, J∞ E-γ, at energies between 4 x 10^18 eV and 4 x 10^19 eV is 2.69 ± 0.02(stat) ± 0.06(syst), steepening to 4.2 ... | Extensive air showers; Energy spectrum; Fluorescence; Suppression | 2008-08 |
| 483 |
 |
Morse, Michael David | Resonant two-photon ionization spectroscopy of jet-cooled PtSi | Jet-cooled diatomic PtSi, produced in a laser ablation supersonic expansion source, has been spectroscopically investigated between 17 400 and 24 000 cm-1 by resonant two-photon ionization spectroscopy. Two vibrational progressions are observed and identified as the [15.7]?'=1 ?X 1?+ and [18.5]?'=1 ... | 1999 | |
| 484 |
 |
Kieda, David B.; Sokolsky, Pierre | Search for > 200 TeV photons from Cygnus X-3 in 1988 and 1989 | Over a period of 16 months from April 1988 to August 1989, we have monitored the flux of cosmic-ray showers with energies above 2X 101 4 eV. We used a two-level array of scintillators covering an area of 3 X 104 m2. Counters on the surface measure the size and direction of each shower while counters... | TeV photons; Cosmic ray showers | 1990-07 |
| 485 |
|
Sokolsky, Pierre | Search for > 200 TeV photons from Cygnus X-3 in 1988 and 1989 | Over a period of 16 months from April 1988 to August 1989, we have monitored the flux of cosmic-ray showers with energies above 2X 10^14 eV. We used a two-level array of scintillators covering an area of 3 X 10^4 m2 . Counters on the surface measure the size and direction of each shower while counte... | Cygnus X-3; Extensive air showers | 1990-07 |
| 486 |
 |
Stringfellow, Gerald B. | Step structure and ordering in Zn-doped GaInP | Presents the results of a study of Zinc dopant effects on both step structure and ordering in GaInP in an effort to further clarify the disordering mechanism. Comparison of the results obtained for Zinc with those reported for tellurium; Experiment; Results; Discussion; Conclusion. | Gallium Compounds; Zinc; Ordering | 1999 |
| 487 |
 |
Eckhoff, David W. | Drought happens: get used to it! Will technology help us to survive? | Drought is not the most popular subject in the world. Actually, as opposed to death, I think there are some bright spots in the drought mitigation future. I will review some of these in this lecture, but I'm also going to discuss some of the downsides of drought, because you can't have one without t... | Wastewater reclamation; Tiered water rates | 2002-09-10 |
| 488 |
 |
LaStayo, Paul C. | Intermuscular fat: a review of the consequences and causes | Muscle's structural composition is an important factor underlying muscle strength and physical function in older adults. There is an increasing amount of research to support the clear disassociation between the loss of muscle lean tissue mass and strength with aging. This disassociation implies that... | 2014-01-01 | |
| 489 |
 |
Zick, Cathleen D. | Over-scheduled or at loose ends? The shifting balance of adolescent time use | Little is known about the time use of American youth. In this study, time diary data from 1977-78 and 2003-05 are used to investigate time use in middle adolescence with the goals of ascertaining (1) changes in time use, (2) how socioeconomic and familial factors influence adolescent time allocation... | Adolescents; Adolescent time use; Adolescent wages; Leisure | 2007-05-18 |
| 490 |
 |
Gu, Jun | Structured, technology independent VLSI design | Rapid advancement in new semiconductor technologies has created a need for the design of existing integrated circuits using these new technologies. These new technologies are required to provide improved performance, smaller feature sizes and lower costs. The conversion of an integrated circuit fro... | VLSI design; semiconductor technologies | 1989 |
| 491 |
 |
Thompson, Cynthia A. | A personalized system for conversational recommendations | Increased computing power and theWeb have made information widely accessible. In turn, this has encouraged the development of recommendation systems that help users find items of interest, such as books or restaurants. Such systems are more useful when they personalize themselves to each user?s p... | Adaptive Place Advisor; Recommendation systems | 2002-06-26 |
| 492 |
 |
Jones, David T. | A study of the Great Basin Land Snail oreohelix strigosa depressa (Cockerell) | A survey of the previous mention of this snail provides a practical background for this essentially morphological study. The literature applicable to Oreolxdix strigosa depressa (Cockerell) in Utah may be summarized by reference to the following articles in the bibliography: directions for preparing... | 1940-10-15 | |
| 493 |
 |
Rahman, Aowabin | Predicting heating demand and sizing a stratified thermal storage tank using deep learning algorithms | This paper evaluates the performance of deep recurrent neural networks in predicting heating demand for a commercial building over a medium-to-long term time horizon (≥ 1 week), and proposes a modeling framework to demonstrate how these longer-term predictions can be used to aid design of a strati... | Building Energy Modeling; Machine Learning; Recurrent Neural Networks; Deep Learning; Heating Load Prediction; Thermal Energy Storage | 2018 |
| 494 |
 |
Hartmann, Donald P. | Considerations in the choice of interobserver reliability estimates | Two types of interobserver reliability values may be needed in treatment studies in which observers constitute the primary data-acquisition system: trial reilability and the reliability of the composite unit or score which is subsequently analyzed, e.g., daily or weekly session totals. Two approache... | Observational technology; Reliability; Validity; Statistics; Recording and measurement techniques; Cohen's kappa; Generalizability theory; Measurement theory; Spearman-Brown prophesy formula; Correlational measures | 1977 |
| 495 |
 |
Gopalakrishnan, Ganesh | Deriving efficient cache coherence protocols through refinement | We address the problem of developing efficient cache coherence protocols for use in distributed systems implementing distributed shared memory (DSM) using message passing. A serious drawback of traditional approaches to this problem is that the users are required to state the desired coherence prot... | Cache coherence protocols; DSM; Message passing | 1997 |
| 496 |
 |
Zhdanov, Michael | Discussion and reply: comments on "electromagnetic geophysics: notes from the past and the road ahead" | The direct current and electromagnetic methods have been around for almost 180 years and have been applied successfully in mining, petroleum, geotechnical, engineering, environmental, groundwater, and tectonic studies. Over such a long period of time, it is possible to lose track of who the pioneers... | 2012-01-01 | |
| 497 |
 |
Gelfand, Donna M. | Mother-toddler interaction patterns associated with maternal depression. | Interactive coordination was observed in laboratory play interactions of pairs of 29 clinically depressed and 14 nondepressed mothers and their 13-29-month-old children (M = 18.9 months). Nondepressed mothers and their children displayed more interactive coordination than depressed-mother dyads (p <... | Depression; Child-rearing; Infants; Motherhood | 1997-09 |
| 498 |
 |
Salari, Sonia Lynne | Social and environmental infantilization of aged persons: observations in two adult day care centers | This study examines the social environments, staff behavior, and social interaction of elderly clients in two adult day care centers. Goffman's (1961) description of the psycho-social effects of the "total institution" is used as a framework for conceptualizing the effects of "partial institutions" ... | Infantilization | 2001 |
| 499 |
 |
Vardeny, Zeev Valentine | Spin and spectral signatures of polaron pairs in ∏-conjugated polymers | We have studied polaron pair photoexcitations in a variety of p-conjugated polymer films by photoinduced absorption (PA) and optically detected magnetic resonance (ODMR). Both luminescent and nonluminescent polymers have been studied. An exchange interaction between polarons broadens their magneti... | Spin signatures; spectral signatures; Photoinduced absorption; Photoexcitation | 1997-08 |
| 500 |
 |
Organick, Elliott I.; Lindstrom, Gary E. | Transforming an Ada program unit to silicon and verifying its behavior in an Ada environment: a first experiment | Microelectronics technology has advanced so rapidly and been so successful that we are new having to build large systems with a multitude of diverse, interacting components. Some components of these systems exhibit distinct architectures and may, in fact, be implemented following different choices o... | Transformation; Ada program units; Silicon | 1983 |