Channel Adnan Raja and Pramod Viswanath May 4, 2009 Abstract Diversity-Multiplexing tradeoff (DMT fading chan- nel. In this paper, we characterize the fundamental DMT of the two-user single antenna universally achieves (for all fading statistics) the DMT for the two-user interference channel
E-print Network
Abstract � In this paper the fading multiple antenna (MIMO) wire-tap channel is investigated. The secret diversity gain and the secret multiplexing gain are defined. Using these definitions, the secret diversity-multiplexing tradeoff (DMT) is calculated analytically when the source node does not have transmitter side channel state ...
, along with the corresponding diversity-multiplexing tradeoffs (DMT). It is shown that with instantaneous feedback, a power allocation based on the feedback bits enables to double the DMT compared to the case feedback, the advantage of power allocation is lost, and the DMT reverts to that achievable with no CSI
This paper studies the setup of a multiple-relay network in which K half-duplex multiple-antenna relays assist in the transmission between a/several multiple-antenna transmitter(s) and a multiple-antenna receiver. Each two nodes are assumed to be either connected through a quasi-static Rayleigh fading channel, or disconnected. We propose a new scheme, which we call random sequential (RS), based on ...
tradeoff (DMT) outer bound derived in Akuiyibo and L�ev^eque, Int. Zurich Seminar on Commun., 2008. The proof is con- structive in the sense that it provides corresponding code design criteria for DMT optimality. For general interference levels, we compute the DMT of a fixed-power-split Han and Kobayashi type
are presented. At high SNR, the diversity- multiplexing tradeoff (DMT) is explicitly derived. We show that for the short-term average power constraint case, with only 1-bit feed- back, the scheme achieves not only a DMT that power allocation based on the feedback bit is crucial in further improving the DMT. An additional factor
In this work, we propose and analyze a two-way training system that exploits the fact that most wireless nodes are capable of both transmitting and receiving signals. That is, the underlying channel is by design a two-way channel, even if only one of the nodes has data to communicate. For half-duplex nodes with one antenna at the source node and M antennas at the destination node, we show that a ...
Recently, there has been growing interest in the design of wireless cooperative protocol to achieve higher diversity-multiplexing tradeoff among single antenna devices. We propose an automatic request for cooperation (ARC) scheme for wireless networks which can achieve higher order diversity by selecting the best relay. In this scheme, ...
NASA Astrophysics Data System (ADS)
We consider a wireless network with multiple terminals ( � ��� � ) as well as multiple receive antennas at the destination ( � �� � ) and obtain diversity multiplexing tradeoff upper bounds for some recently proposed cooperative diversity protocols. The results obtained show that irrespective of the coding scheme employed none of these ...
It is well known that the presence of double scattering degrades the performance of a MIMO channel, in terms of both the multiplexing gain and the diversity gain. In this paper, a closed-form expression of the diversity-multiplexing tradeoff (DMT) of double scattering MIMO channels is obtained. It is shown that, for a channel with nT transmit antennas, nR ...
Constant amplifier gain achieved by maintaining quiescent collector current constant with changes in
NASA Technical Reports Server (NTRS)
these denitions, the secret diversity- multiplexing tradeoff (DMT) is calculated analytically for no transmitter antennas, and the secret DMT depends on the remaining degrees of freedom. When CSI is available of CSI is unlike the DMT results without secrecy constraints, where the DMT remains the same for no CSI
... in today's information environment to achieve information superiority. ... PSYCHOLOGICAL OPERATIONS, *INFORMATION WARFARE, STRATEGIC ...
DTIC Science & Technology
... DISTRIBUTED BEAMFORMING IN MAN PORTABLE COMMUNICATION NETWORKS ... gains achieved by distributed beamforming, was performed. ...
... Low excess noise at high gains is achieved by exploiting the natural resonance for hole avalanche multiplication in the gain region while high ...
6 days ago ... The Girls Achieving In Non-traditional Subjects (GAINS) program ... Desert Research And Technology Studies (RATS) will help evaluate a ...
NASA Website
... voltage of the IV curve is essential in achieving conversion gain ... to describe quasiparticle mixing is extended here to include pair current contribution ...
A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain ...
DOEpatents
... Title : US Strategy for Iran Following its Achievement of Nuclear Weapon Capability. ... What does Iran perceive it will gain with its nuclear weapons? ...
An error control coding scheme was devised to achieve large coding gain and high reliability by using coded modulation with reduced decoding complexity. To achieve a 3 to 5 dB coding gain and moderate reliability, the decoding complexity is quite modest. ...
National Technical Information Service (NTIS)
We theoretically study the phase dependent gain absorption properties in an Er3+-doped yttrium aluminum garnet crystal. We show that the phenomenon of flattened gain (absorption) can be achieved in a closed three-level system when the total interaction phase equals to ?/2 (3?/2). We also can realize a flexible control of the ...
Outcome #2 - Gaining Retention and Achievement for Students Program ... as the number of students receiving a final grade of A, B, or C in the course. ...
More and more companies and organizations are recognizing the benefits to be gained by achieving ISO
... A parametric analysis of the fan design parameters showed the performance gains achievable with larger diameter fans. ...
... training infrastructure and augment capabilities across Army components to gain efficiency and achieve economies of scale in conducting ...
... back control law is employed, resulting in more accurate simulations ... Feedback gains ... goal of the design is to achieve robust formation maintenance ...
We consider a general multiple-antenna network with multiple sources, multiple destinations, and multiple relays in terms of the diversity�multiplexing tradeoff (DMT). We examine several subcases of this most general problem taking into account the processing capability of the relays (half-duplex or full-duplex), and the network geometry (clustered or nonclustered). We first study the ...
The observed NMR signal size depends on the receiver gain parameter. We propose a receiver gain function to characterize how much the raw FID is amplified by the receiver as a function of the receiver gain setting. Although the receiver is linear for a fixed gain setting, the actual gain of the ...
PubMed Central
Since charter school research on student achievement is mixed, many researchers and policy makers advocate looking inside the "black box" of schools to better understand the conditions under which schools of choice may be effective. We begin to address this issue with data from charter schools and a comparison group of traditional public schools. We also conduct propensity ...
ERIC Educational Resources Information Center
of optical amplifiers. Still, in achieving wider, and flatter Raman gain spectrum for different typesSemi-Empirical, Multi-Wavelength Raman Gain Engineering Algorithm with Pump Interaction algorithm for the precise engineering of multi-channel gain profile of Raman amplifier. By employing
The authors present measurements of the gain and pulse height distribution width of a microchannel plate (MCP) chevron pair as a function of the voltages applied to each plate and across the interplate gap. These data are used to test an existing theory which describes how the gain of the chevron pair is related to the gains of the ...
Energy Citations Database
This evaluation of the Portland Public Schools Summer School 1984 Program analyzes achievement gains on the Portland Achievement Levels Tests for three student groups: (1) regular education; (2) not promoted; and (3) talented and gifted (TAG). The four-week program served 743 students, primarily from grades one to eight. Eleven subject ...
Presents the results of a study of student achievement, using a value-added testing technique, after 3 years of Memphis Restructuring Initiative. Findings show positive achievement gains in reform schools compared to demographically similar control schools, though strength of gains varied by type of reform and ...
The popular claim that homework time is positively related to achievement and achievement gains was tested in three studies. Time on homework was compared and contrasted with other indicators of homework assignment (i.e., homework frequency) and students' homework behavior (i.e., homework effort). The results of the three studies ...
In any free electron laser (FEL) experiment, the crucial quantities to be optimized are the gain and the efficiency. Large FEL efficiency can be achieved by either tapering the undulator or recovering the e-beam, or by a combination of both methods. The g...
VISA (Visible to Infrared SASE Amplifier) is an FEL designed to obtain high gain at a radiation wavelength of 800 nm. Large gain is achieved by driving the FEL with the 71 MeV, high brightness beam of the Accelerator Test Facility (ATF) and using a novel,...
The technical objective is to develop techniques in signal analysis to maximize achievable array gain of a random sonobuoy array. The approach is investigate phase decorrelation effect on array gain and ways to overcome these effects. Earlier work focused...
It is shown that point contact Josephson junctions can function as millimeter wave heterodyne mixers with conversion gain. The best results achieved thus far show a single sideband conversion gain of 1.3 and a mixer contribution to the system noise temper...
... If the a gain of the a, /, -y filter is chosen small to achieve good noise reduction, the "optimal" -Y of Kalata [1] ... rF2 = T _4 w 13 (2.29) ...
This program is concerned with a high gain crossed-field amplifier in which the secondary emmision cathode is formed into a slow-wave structure. The input signal is impressed on this structure and its fields achieve phase sorting of the electrons at low e...
The conditions required to achieve bistability in two-mode semiconductor lasers via the nonlinearity associated with gain saturation are discussed. The laser can be switched between the bistable states through coherent or incoherent optical control. Wavelength bistability in such a laser is demonstrated experimentally.
This study elaborates the "what works?" question by exploring the effects of variability in program implementation quality on achievement. Particularly, the effects on achievement of computerized assessment of reading were investigated, analyzing data on 51,000 students in Grades 1-12 who read over 3 million books. When minimum implementation quality ...
An error control coding scheme was devised to achieve large coding gain and high reliability by using coded modulation with reduced decoding complexity. To achieve a 3 to 5 dB coding gain and moderate reliability, the decoding complexity is quite modest. In fact, to achieve a 3 dB coding ...
compensation is achieved, the gain of the response. (eye movement/head .... a walk I found too much motion in my visu- al picture ...... by off-vertical ...
John Evans recognized that its transmitter power and operating frequency would have to be raised in order to achieve critical extra gain for the Venus ...
... in the belief that he will become a martyr and gain entry into paradise is acting ... undertaken by the UITG was their decision to wear the colors of the ...
... domicile, child care, and pregnancy. Two female officers also mentioned gaining control over their life and already achieving their goals as reasons ...
potential gains that can be achieved through a better inventory control. 2. When b is significantly smaller than, or very close to, the value of h (i.e., ...
... Pagination or Media Count : 28. Abstract : The gain in structural efficiency achieved by reinforcing the aluminum cover skins of multiweb beams and ...
Putting some careful consideration on your team's accomplishments, areas of expertise, and what you hope to gain by working with NASA will help facilitate ...
... gains it had achieved in ecological quality resulting ... fuel-cell technology, carbon footprint trade, and ... with a view toward improving regional security ...
... emphasized cardiovascular endurance training. Other differences could arise if different methods were used to achieve identical fitness gains. ...
... body temperature that an animal achieves when metabolic heat gain and evaporative heat loss are insignificant (Bakken 1992), which is likely ... ...
NBII National Biological Information Infrastructure
Weigh plates to determine weight gain, and repeat impreg- nation cycle as necessary to achieve ..... College Park, Wryland 20740. 2 copies + 1 reproducible ...
... One possible approach of achieving such a pre-beam gain is t use of electron bombardment induced conductivity (EBIC) in a thin layer of an i ...
... in Section IV a special queueing ,r/del of multitasking systems and evaluate the potential gain in processing capability achievable by multi tasking. ...
... point of this presentation was that if relatively shc-r: endurance air- craft vare used, the gains to be achieved by avitchin- t. m ulti-shift Page 21. z 0 0 ...
... time detection of a Gaussian signal in colored Gaussian flow noise ... The study describes potential gains achievable with optimal processing over ...
... of Defense (DoD) Issuances (current and cancelled ... was achieved with beam currents as large as ... CAVITIES, ELECTRON BEAMS, LINEARITY, GAIN ...
... Where there are no photographic films available, the same gain in integrating time over a scanning spectro- 1r meter can be achieved with a ...
The LAC gain synthesis is achieved by an exact algebraic optimization of a ... to formulate and implement a sequential LAC synthesis procedure in which the ...
... By operating vanadium point contacts at 1.4K, the authors have achieved a single side band mixer noise temperature of 54K with a conversion gain ...
and programs that yield high energy efficiency gains. Increasing efficiency in the production and use of energy will help achieve climate and energy goals, while minimizing the...
Science.gov Websites
The detectors are based on the breakthrough technology of internal discrete amplification to achieve the unparalleled combination of high gain, low noise, ...
The Girls Achieving In Non-traditional Subjects (GAINS) program celebrated ... Clara Unified School District (SCUSD) at Peterson Middle School in Sunnyvale. ...
... With space-time coding one can achieve the same diversity gain with M TX ... the wireless MIMO channel coupled with the use of OFDM in wideband ...
Jun 16, 2011 ... St. Paul, MN: U.S. Department of Agriculture, Forest Service, ... and gain in precision achieved by stratification relative to simple random ...
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... And, he said, a new, charismatic governor is generating excitement about possibilities for the province and the broader Afghanistan. ...
DefenseLINK Web Site
... close with and achieve his objective,� he said. �I believe we are at this point now -� in the last 100 meters of this mission.�. ...
May 18, 2009 ... Thus, the phase ambiguity associated with BPSK modulation does not need to be resolved until the coding gain is achieved. A convolutional ...
behaviors when a large adaptive gain is used to achieve fast adaptation in order to ... due to fast adaptation can be an issue. In certain applications ...
Because of the 6-minute periodicity of the disturbance, the ACS thought it was induced by an onboard maintenance pointing dither sequence (named UTILity ...
the goal is to slow the rate of weight gain while achieving normal growth and development. Maintaining a healthy weight throughout childhood may reduce the risk of...
A high voltage gain operational amplifier implemented in 0.5 micron GaAs E/D HEMT technology is presented. The amplifier principally consists of a differential input stage and a high gain cascade stage which was developed by Toumazou and Haigh. On-wafer measurement verifies that the amplifier achieves an open-loop voltage ...
Public perception of adults with developmental disabilities realizing learning gains often remains illusive. This paper highlights key findings in achievement in basic skills for adults with mental retardation on a functional assessment in a life skills context for three program years (2003-2006). In this study the time period between the pre- and ...
The report evaluates the effects of special inservice training of a group of elementary teachers. The training program--a series of workshops plus immediate follow-on efforts--sought to increase achievement in students by changing instructional practices ...
Improving teaching quality is widely recognized as critical to addressing deficiencies in secondary school education, yet the field has struggled to identify rigorously evaluated teacher-development approaches that can produce reliable gains in student achievement. A randomized controlled trial of My Teaching Partner-Secondary--a Web-mediated approach ...
PubMed
Successive refinement of Diversity for fading ISI MISO channels S. Dusad and S. N. Diggavi Abstract channels [7]. The main result of this paper is that the diversity multiplexing tradeoff for fading MISO ISI successive refinability. For the MISO case we need to develop a coding strategy related to universal codes
This paper experimentally demonstrates the feasibility of a 2 x 2 MIMO optical communication system based on mode group diversion multiplexing in the presence of strong mode crosstalk over 250m GI-MMF. The parallel signal detection and processing are realized through the use of PD array.
the diversity-multiplexing tradeoff (DMT) of two-way relay channels (TWRC) with multi- antenna relay at finite are very tight for all practical SNR regions. Based on these bounds, the estimates of finite-SNR DMT (f-DMT. Furthermore, the impact of time sharing, rate allocation and relay location on the outage and f-DMT is also
has m antennas. For m n, an upper bound on the diversity-multiplexing tradeoff (DMT) is calculated explicitly, and is found to be tighter than the full-duplex bound in general. This half-duplex DMT bound can, the special case m = 1 is investigated for arbitrary values of n, to illustrate that the half-duplex DMT can
@ee.kaist.ac.kr Abstract-- In this paper, we analyze the outage performance and diversity-multiplexing tradeoff (DMT, large Rician factor, and large antenna array. The corresponding DMT curves are also investigated. I. In this paper, we analyze the diversity-multiplexing tradeoff (DMT) for Rician channels. In addition, we
is derived. The DMT and outage performance are also analyzed for Rician mul- tiple-input�single-output (MISO for Rician multiple-input�single-output (MISO)/single- input�multiple-output (SIMO) channels through some [34]. Using the outage expression for MISO/SIMO channels, closed- form expressions for the maximum
Investigated the effects of cooperative learning on achievement in and attitudes toward mathematics among fifth graders of color in a culture different from that of the United States (Bermuda). Participants completed parts of the California Achievement Test and Penelope Peterson's Attitude Toward Mathematics Scale. Pre-test and post-test data indicated ...
A novel scheme for a flashlamp-pumped ultrahigh-gain laser amplifier is presented. It is based on a monolithic slab design achieving a gain of 10(5). The measured ratio between pulse and prepulse output power was 5x10(7). PMID:19340135
We demonstrate that the conditions of spaser generation and the full loss compensation in a dense resonant plasmonic-gain medium (metamaterial) are identical. Consequently, attempting the full compensation or overcompensation of losses by gain will lead to instability and a transition to a spaser state. This will limit (clamp) the inversion and lead to the ...
VISA (Visible to Infrared SASE Amplifier) is an FEL designed to obtain high gain at a radiation wavelength of 800 nm. Large gain is achieved by driving the FEL with the 71 MeV, high brightness beam of the Accelerator Test Facility (ATF) and using a novel, strong focusing, 4 m long undulator with a gap of 6 mm and a period of 1.8 cm. We ...
DOE Information Bridge
VISA (Visible to Infrared SASE Amplifier) is an FEL designed to obtain high gain at a radiation wavelength of 800 nm. Large gain is achieved by driving the FEL with the 71 MeV, high brightness beam of the Accelerator Test Facility (ATF) and using a novel, strong focusing, 4m long undulator with a gap of 6 mm and a period of 1.8 cm. We ...
We present a detailed study of the gain length in an active medium obtained by doping of DNA strands with DCM dye molecules. The superior thermal stability of the composite and its low quenching, permits to obtain optical gain coefficient larger than 300 cm^-1. We also show that such an active material is excellent for integration into photonic ...
Double shell targets for use with 0.2-1.0 ..mu.. lasers are discussed. With 0.2 ..mu.. light, such designs achieve 500-1000 times liquid density at 2 KJ, 10% or more of breakeven at 15 KJ, gains of 10 or more at 200 KJ and a gain of 1000 for lasers of 1 to 10 megajoules.
Double shell targets for use with 0.2-1.0 mu lasers are discussed. With 0.2 mu light, such designs achieve 500-1000 times liquid density at 2 KJ, 10% or more of breakeven at 15 KJ, gains of 10 or more at 200 KJ and a gain of 1000 for lasers of 1 to 10 meg...
We propose a method to control the gain, absorption and dispersion properties in an asymmetric double quantum dot nanostructure interacting with four optical fields. From numerical results, it is found that the gain, zero-absorption (transparency), normal dispersion and the anomalous dispersion can be achieved separately by modulating ...
We propose experimentally simplified schemes of an optically dispersive interface region between two coupled free electron lasers (FELs), aimed at achieving a much broader gain bandwidth than in a conventional FEL or a conventional optical klystron composed of two separated FELs. The proposed schemes can universally enhance the gain of ...
Single-pass amplifier gains at 1.32 $mu$m have been measured in an 80-mm Nd:YAG rod, achieving a saturated gain of 3.1. Small-signal gain comparisons imply a stimulated-emission cross-section ratio (1.32/1.06 $mu$m) of 0.19. (auth)
This paper compares the gain that can be achieved with a one- or two-stage concentrator, when the first stage is a Fresnel lens or a parabolic mirror, as a function of the luminosity of the concentrator. The results show that the achievable gain using a parabolic mirror is greater than that obtained using a flat or ...
Negative phase velocity materials are engineered media that are currently enjoying a surge of interest due to their interesting properties and potential applications, through negative refraction, to achieve cloaking that makes things invisible. The literature is alive with papers devoted to the design of suitable metamaterials and there is a particular desire to operate at THz ...
This research was conducted to describe ethnically diverse new mothers' perceptions of gestational weight gain. Forty-nine low-income women of diverse racial and ethnic origins who birthed an infant within the past year completed a semistructured interview in a pediatric clinic waiting room. The interviews were designed to elicit views on gestational weight ...
Pregnancy is now considered to be an important risk factor for new or persistent obesity among women during the childbearing years. High gestational weight gain is the strongest predictor of maternal overweight or obesity following pregnancy. A growing body of evidence also suggests that both high and low gestational weight gains are independently ...
We report for the first time Erbium doped Tellurium dioxide single-mode planar rib waveguide amplifiers with net fiber to fiber gain and wide bandwidth operation. Peak internal gains of up to 14 dB have been achieved in 5 cm long rib waveguides (2.8 dB/cm) fabricated by co-sputtering of Tellurium and Erbium in an oxygen ambient and ...
We use a simple setup based on an infinite planar slab gain medium with no mirrors to explore the possibility of realizing a recently discovered resonance effect related to the mathematical concept of spectral singularity. In particular we determine the range of the gain coefficient g and the width L of the gain region required to ...
A single-electron inverter was fabricated that switches from a high output to a low output when a fraction of an electron is added to the input. For the proper operation of the inverter, the two single-electron transistors that make up the inverter must exhibit voltage gain. Voltage gain was achieved by fabricating a combination of ...
When the gain in a free electron laser is high enough to produce optical guiding, the resonator mode distorts and loses its forward-backward symmetry. We show that the resonator mode in a high gain FEL can be easily constructed using the mode expansion technique taken separately in the interaction and the free-space regions. We propose design strategies to ...
In May 2009, the Institute of Medicine (IOM) introduced revised gestational weight gain guidelines that were based on balancing the benefits and risks of weight gain for both the mother and child's health. This article provides an overview of these new recommendations, explaining the key changes made from the previous 1990 IOM recommendations. The ...
We theoretically analyze gain guiding in large-core Bragg fibers, to be used for large-mode-area laser amplifiers with single-transverse-mode operation. The signal is gain-guided in a low-index core, whereas the pump is guided by the photonic bandgap of the Bragg cladding to achieve good confinement. The high-index layers in the Bragg ...
A model is developed which is capable of describing the evolution of gain resulting from both rapid radiative and expansion cooling of a recombining, freely expanding plasma. It is demonstrated for the particular case of a carbon/selenium plasma that the cooling rate which leads to optimal gain can be achieved by adjusting the ...
This paper describes the procedures and results of an investigation to evaluate potential increases in nationwide hydropower production that could be achieved by reallocation of flood control storage at existing hydropower reservoirs. One aspect of the investigation considered only the increase in energy that could be achieved by storage reallocation; a ...
The present objective of the national Inertial Confinement Fusion (ICF) Program is to determine the scientific feasibility of compressing and heating a small mass of mixed deuterium and tritium (DT) to conditions at which fusion occurs and significant energy is released. The potential applications of ICF will be determined by the resulting fusion energy yield (amount of energy produced) and ...
We use a rate equation approach to model the conditions for optical gain in nanocluster sensitized erbium in a slot waveguide geometry. We determine the viability of achieving net gain for the range of reported values of the carrier absorption cross section for silicon nanoclusters. After accounting for the local density of optical ...
The Erbium-doped fiber amplifiers (EDFA) are widely available in a today's commercial market, and are deployed in various optical transmission applications from terrestrial system to undersea system. Broad gain spectrum over 9 THz enabled huge growth of bandwidth usage in 1550nm region aimed at broadband Internet, and its broad gain characteristics ...
This study compared the effectiveness of collaborative group composition and instructional method on reasoning gains and achievement in college biology. Based on initial student reasoning ability (i.e., low, medium, or high), students were assigned to either homogeneous or heterogeneous collaborative groups within either inquiry or didactic instruction. ...
This study assessed the influence of using mind maps as a learning tool on eighth graders' science achievement, whether such influence was mediated by students' prior scholastic achievement, and the relationship between students' mind maps and their conceptual understandings. Sixty-two students enrolled in four intact sections of a grade 8 science ...
Custom in-the-ear (ITE) hearing aids (standard linear amplifiers with single-pole-filter low-frequency tone control and a class A amplifier output stage) were fit to 90 ears using the revised National Acoustics Laboratories' formula (NAL-R), and to 20 ears each using Prescription of Gain/Output II (POGO II) and Memphis State University (MSU) formulas. Both real-ear insertion ...
Explores causes of academic achievement gains by African-American students using data from the National Assessment of Educational Progress. Evidence suggests that the socioeconomic advancement of African-American families is more important than school programs, particularly desegregation, in explaining rising African-American ...
gains. If so, rather than reflecting the talents and skills of individual teachers, estimates of teacherNBER WORKING PAPER SERIES ESTIMATING TEACHER IMPACTS ON STUDENT ACHIEVEMENT: AN EXPERIMENTAL to the source. #12;Estimating Teacher Impacts on Student Achievement: An Experimental Evaluation Thomas J. Kane
Middle school boys at risk for behavior problems participated in an initiative (administered via an intramural basketball program) that taught positive skills and provided incentives for achieving academically and following rules. Participation depended on appropriate academic achievement and adherence to school rules. Participants displayed large ...
The Southern Regional Education Board (SREB)-State Vocational Education Consortium's commitment to higher standards for and greater achievement of vocational students has brought substantial gains in student performance. SREB's High Schools That Work (HSTW), a school improvement initiative, documents achievement ...
As part of the Department of Energy`s Advanced Gas Turbine Systems Program, an investigation has been performed to evaluate {open_quotes}pressure-gain{close_quotes} combustion systems for gas turbine applications. Results from the investigation have shown that, due to the oscillatory combustion process, a pressure boost can be achieved for suitable ...
This patent describes a broad area injection semiconductor laser having a predetermined two-dimensional pattern of injecting and noninjecting contacts over a broad area of the device in which laser the two-dimensional spatial gain profile is tailored over the broad area to conform to a predetermined tailored pattern of varying injection by a predetermined contact pattern of ...
High-gain shock ignition is numerically investigated for specific marginally igniting targets�targets producing thermonuclear gain less than one�extracted from two distinct target families. Homothetic transformations keeping constant the implosion velocity, the adiabat, and the in-flight aspect ratio are used to draw target families. Conventional and ...
The compelling need for standoff detection of hazardous gases and vapor indicators of explosives has motivated the development of a remotely pumped, high-gain air laser that produces lasing in the backward direction and can sample the air as the beam returns. We demonstrate that high gain can be achieved in the near-infrared region by ...
As part of the Department of Energy`s Advanced Gas Turbine Systems Program, an investigation is being performed to evaluate ``pressure gain`` combustion systems for gas turbine applications. This paper presents experimental pressure gain and pollutant emission data from such combustion systems. Numerical predictions for certain combustor geometries are ...
In spite of alarming increases in obesity, little is known concerning the influence of emotional distress about weight gain on perceived self-efficacy in maintaining self-control when controlling for racial identity. This study found that emotional distress toward goal achievement failure mediated the influence of ethnicity on perceived self-efficacy in ...
Purpose, scope, and method of study: The primary purpose of this study was to examine the relationship between teacher-licensure level in the New Mexico Three Tiered Licensure (NM 3-TL) System and gains in student academic achievement in reading and mathematics in grades four and five. A secondary purpose was to determine whether student socioeconomic ...
In multisection laser diodes, the amplitude or frequency modulation (AM or FM) efficiency can be improved using the gain lever effect. To study gain lever, InGaAs double quantum well (DQW) edge emitting lasers have been fabricated with integrated passive waveguides and dual sections providing a range of split ratios from 1:1 to 9:1. Both the electrical and ...
It was discovered that there are certain microorganisms that can use the extraordinary toxic metalloid arsenic (As) to gain energy for their growth, even use arsenic instead of phosphorus to grow. In this article, we reviewed recent advanced research achievements and summarized these microbial arsenic metabolisms in the following 6 aspects: 1. ...
Shock ignition, an alternative concept for igniting thermonuclear fuel, is explored as a new approach to high gain, inertial confinement fusion targets for the National Ignition Facility (NIF). Results indicate thermonuclear yields of approximately 120-250 MJ may be possible with laser drive energies of 1-1.6 MJ, while gains of approximately 50 may still ...
Shock ignition, an alternative concept for igniting thermonuclear fuel, is explored as a new approach to high gain, inertial confinement fusion targets for the National Ignition Facility (NIF). Results indicate thermonuclear yields of approx120-250 MJ may be possible with laser drive energies of 1-1.6 MJ, while gains of approx50 may still be ...
Shock ignition, an alternative concept for igniting thermonuclear fuel, is explored as a new approach to high gain, inertial confinement fusion targets for the National Ignition Facility (NIF). Results indicate thermonuclear yields of �120-250MJ may be possible with laser drive energies of 1-1.6 MJ, while gains of �50 may still be ...
In micro-macro bilateral control systems, it is important to use position and force scaling factors that depend on the size of the master and slave system. Moreover, it is vital for control systems to use appropriate control gains depending on the scaling ratio between master and slave response. This paper proposes a micro-macro bilateral control system based on the scaling of ...
We present a novel high-gain patch antenna utilizing composite right-left handed (CRLH) structure and dendritic cell metamaterials. The proposed CRLH antenna, composed of modified Sievenpiper mushroom unit-cells, is based on the positive first-order resonance mode for high gain. In addition, the dendritic cell metamaterials are used to surround the ...
Raman amplification in silica and fluoride glass fibers is studied experimentally and theoretically. Two tunable dye lasers are employed to provide pump and signal light. In an 80 m long silica glass fiber, a small-signal gain of 39 dB has been achieved at a pump wavelength of 580 nm. The gain bandwidth is 127 cm-1 in small-signal ...
In this paper we report on the multi-section gain and absorption analysis of strain engineered molecular beam epitaxy (MBE) grown GaAs and InGaAs capped bilayers. The InGaAs capped bilayer quantum dot (QD) lasers extends the room temperature lasing wavelength to 1.45 ?m. The spectral measurement of gain demonstrates that net modal gain ...
We report a disk laser using two quantum-dot semiconductor gain elements, resulting in what we believe is the first demonstration of intracavity frequency conversion with these active media. Output power of 6 W has been obtained in dual-gain configuration at a wavelength of 1180 nm, while single-gain lasers produced up to 3 and 4 W ...
Many studies have shown the benefits of smaller class sizes--including random experiments like the Student Teacher Achievement Ratio Project conducted in 79 elementary schools in Tennessee, which assigned children to either small or regular-size classes, as well as large-scale analyses of small and large classrooms that have occurred naturally. Although researchers may quibble ...
The variation of the gain and the excess noise factor in HgCdTe avalanche photodiodes (APDs) with different junction geometries are compared with published theoretical and numerical work. It is shown that, although some features of the gain curves are reproduced, such as the constant exponential increase in the gain, the theoretical ...
The purpose of this study was to measure whether Christian programs had a positive influence on the academic achievement of low-literate male inmates. The sample consisted of 124 male inmates in a closed security prison in the southeastern United States who were participating in an Adult Basic Education (ABE) program. The researcher grouped the sample into two categories: (1) ...
Investigates high-achieving fifth-grade students' achievement gains and conceptual reorganization on convection. Features an instructional sequence of three dyadic inquiry investigations related to convection currents as well as pre- and post-assessment consisting of a multiple-choice test, a card sorting task, construction of a ...
Schools are under increasing pressure to meet accountability requirements and show growth in student achievement across tested content areas. As a result, throughout the school year, student achievement data are analyzed to discover data trends that highlight both student gains and gaps in learning. Achievement ...
Integrated all-optical logic gates that exploit the optical gain quenching effect in laterally optically pumped semiconductor multi-section edge-emitting lasers (SMEELs) are described. An accurate 2D time-domain (TD) model was implemented to investigate the gates' gain, modulation depth, and speed. Gain Quenched Laser Logic ...
This study investigated whether an identifiable link existed between gains in technology literacy and achievement in the areas of reading, mathematics, and language arts. Normal curve equivalent (NCE) content score changes from TerraNova assessments were calculated for approximately 5,000 students from fourth- to fifth-grade and 5,000 students from ...
This paper presents the development of 110-120-GHz monolithic low-noise amplifiers (LNA's) using 0.1-micron pseudomorphic AlGaAs/InGaAs/GaAs low-noise HEMT technology. Two 2-stage LNA's have been designed, fabricated, and tested. The first amplifier demonstrates a gain of 12 dB at 112 to 115 GHz with a noise figure of 6.3 dB when biased for high gain, and ...
In grade 8 (the only grade in which subgroup trends were analyzed by achievement level), Louisiana showed mostly gains in reading at the basic and proficient levels for racial/ethnic subgroups, low income students, and boys and girls. There were slight declines at the advanced level in reading for some subgroups. In math, there were ...
, fosters program quality and reusability. The benefits of cleanroom can be compounded with the benefits is illustrated on a simple C++ module. 1 Cleanroom Development of Object Oriented Software With a combination of technical and managerial standards, Cleanroom has achieved great gains in terms of programmer productivity
Voxtel Inc. proposes to optimize the design of a large area, 1.55?m sensitive HgCdTe avalanche photodiode (APD) that achieves high gain with nearly no ...
The Forest Service, building on achievements gained through a century of commitment to excellence, continues its stewardship of the Nations forests and grasslands to sustain natural resources for current and future generations. This plan provides the stra...
To achieve the quality and productivity gains necessary to compete successfully in a global market, shipbuilders must prepare employees to apply diverse principles to complex problems. Rote learning of facts is no longer a useful paradigm for training emp...
The United States Army has achieved a significant advantage over the Warsaw Pact forces in the area of tank gunnery under conditions of darkness, smoke, fog, and rain. This advantage has been gained through the development of the tank thermal sight. The a...
Concerns about decline of genetic diversity in sugarcane (Saccharum spp.) breeding programs need be addressed to define better breeding strategies aimed at achieving greater genetic gains. The objectives of this study were to reconstruct the divergence in the Canal Point breeding populations as temp...
Technology Transfer Automated Retrieval System (TEKTRAN)
In recent high luminosity colliders, the finite crossing angle scheme becomes popular to gain the multiplicity of luminosity with multi-bunch or long bunch operation. Success of KEKB showed that the finite crossing angle scheme was no problem to achieve t...
The gains in efficiency and reduction in battery costs that can be achieved by changing the effective number of stator turns in an electric motor are demonstrated by simulating the performance of an electric vehicle on a set of eight standard driving cycles.
Using the synchrotron and X-ray radiation, the luminescent properties of barium-ion-containing fluorides are investigated. The studies have shown that by changing the compound composition, it is possible to achieve a gain in luminescence of different form...
Next-generation space-based radar and communications arrays require very large apertures in order to achieve the required gain and resolution. The implementation of these very large apertures poses several challenges in order to reduce the cost and weight...
This study was undertaken to investigate the effectiveness of non-intellectual variables in the prediction of success in Naval Air Technical Training. Three criteria of achievement were used: pass-fail, final standing, and residual gain. Results showed th...
The gain in interferometric resolution of extragalactic sources at radio frequencies which can be achieved by placing a very long baseline interferometry (VLBI) antenna in space is quantitatively described and a VLBI demonstration experiment using a large...
The National Ignition Facility is a $1.1B DOE Defense Programs Inertial Confinement Fusion facility supporting the Science Based Stockpile Stewardship Program. The goal of the facility is to achieve fusion ignition and modest gain in the laboratory. The N...
The objective of this program is to develop the knowledge and technology necessary to take full advantage of the unidirectional attenuative properties of ferrites in achieving improved gain and bandwidth in crossed-field microwave amplifiers and oscillato...
Productivity gains have recently been made at the National Transonic Facility wind tunnel at NASA Langley Research Center. A team was assigned to assess and set productivity goals to achieve the desired operating cost and output of the facility. Simulatio...
The objective of the PACE project is to determine the HED moment required to achieve nT magnetic field at distances from .5-1 Mm from the location of the ground based HED at locations near the magnetic equator. Significant advantage can be gained if the H...
Recently a new optimal control modification has been introduced that can achieve robust adaptation with a large adaptive gain without incurring high-frequency oscillations as with the standard model-reference adaptive control. This modification is based o...
National Cancer Institute Dialogue on Dissemination August 19, 2004 Call Summary There is broad consensus in the health community that significant gains can be achieved by improving rates of adoption of evidence-based approaches to cancer care.
Cancer.gov
An important step in developing a ranch or allotment management plan for grazing lands is defining a rangeland monitoring program to evaluate progress toward achieving management objectives. A monitoring program can: 1) help determine the benefits gained from changes in grazing management or invest...
Double shell targets may have decisive advantages over single shells for achieving a number of goals in the laser fusion program. With 0.2 ..mu.. light, such designs achieve 500 to 1000 times liquid density at 2 kJ absorbed; 10 percent or more of breakeven at 15 kJ absorbed, and gains of 10 or more at 200 kJ absorbed. These targets are ...
The report provides a brief summary of the scientific achievements gained in a three-year study of low temperature physics. Topics include second sound in solids, thermal conductivity and Poiseuille flow in a phonon gas, superconducting semiconductors, an...
A new planar tube geometry has been developed wherein the usual screen grid electrode is omitted. The normal tetrode advantages of low output capacitance, high gain, and high plate efficiency are achieved by use of a grid pattern positioned on the surface...
During the summer and fall of 1982 the Israeli government used military force in an operation which they believed would achieve certain immediate political goals. Israel invaded Lebanon with an announced goal of clearing PLO terrorists from an area which ...
The use of Information Operations (IO) as an integration process is paramount in today's information environment to achieve information superiority. If it is true that information is an element of national power, then IO is the U.S. military's contributio...
The inductive-wall and longitudinal space-charge impedances of LAMPF II are calculated. These effects are small below transition, but may require additional rf in order to achieve the desired energy gain per turn late in the accelerator cycle.
Microbial inactivation using high temperatures is well known process and has contributed significantly toward food safety and shelf life extension for the food industry. Mechanical high pressure (hydrostatic) treatment is also gaining interest in food processing applications for achieving microbial...
This report examines conservation achievements in the petroleum refining industry, and assesses the impact existing Federal energy conservation and fuel-switching programs have had in furthering conservation gains and encouraging switching to coal.
Abstract: We present a systematic numerical study of metamaterials integrated with gain media to achieve composite metamaterials at terahertz and infrared wavelength with reduced losses. The impact of spatial dispersion on the effective permeability resonance restoration is emphasized.
... and fall times, a 3-gigahertz bandwidth, 1000 gain, and either S-20 or 1.06 micron InAsP photocathodes achieving 7% quantum efficiency at 5000A ...
Aug 6, 2010 ... High gain per unit length at 1.2 micron can be achieved in Ho-doped fluoride glass fiber due to the strong pump absorption at 1187 nm and ...
MSc Health Sciences (Retinal Screening - Diabetes) "Timely screening and effective treatment can introduces the issues surrounding the effects of diabetes on the eye. You will gain knowledge and advanced � Diabetes) This course will develop the skills and knowledge necessary to achieve excellence of care
A Hadamard Transform Spectrometer is described. This multiplexing spectrometer is based on a 127 square cyclic Hadamard matrix. A resolving power of 0.1/cm is achieved with a multiplexing gain factor of over five-fold in signal-to-noise ratio over use of ...
Children begin kindergarten with many different levels of reading and mathematics skills and make significant gains in their reading and mathematics achievement over the first 2 years of school (West, Denton, and Germino Hausken 2000; West, Denton, and Re...
We have constructed a prototype transmission positron microscope (TPM) and taken magnified pictures of various objects with it. Information gained from the prototype TPM has allowed us to predict resolutions achievable in the near future using an upgraded TPM. Applications are discussed.
Nov 22, 2010 ... The Girls Achieving In Non-traditional Subjects (GAINS) program celebrated its 10th ... in the Santa Clara Unified School District (SCUSD) at Peterson Middle School in Sunnyvale. ... Missions; Education & Outreach ...
This study examined the effects of mental imagery on short-term and long-term retention of learning material. Subjects presented with learning material through mental imagery achieved significantly higher gain scores on tests of immediate and long-term re...
The purposes of this report are to describe the academic gains children have made from kindergarten through third grade, their achievement status at the end of third grade, and their perceptions about their school experiences. Two types of analyses were u...
Eastern Europe has made progress on reform in the past year. No country has yet achieved a market economy, and reforms have not yet lifted these economies out of recession. But gains have been made on a wide range of issues since mid-1991: the private sec...
A NAVSTAR satellite has a navigation antenna array beamed toward the earth. A communications antenna array for communicating with other satellites requires a pattern null near the axis and high gain to the sides with minimum losses. This is achieved with ...
The Department of Energy is proposing to construct the National Ignition Facility (NIF) to embark on a program to achieve ignition and modest gain in the laboratory early in the next century. The NIF will use a = or > 1.8-MJ, 0.35-mm laser with 192 indepe...
Since the end of World War II, the use of military forces to help achieve peace, without resorting to violence, has gained wide acceptance. Most recently, the demise of the Soviet Union and the end of the Cold War have ushered in a new era of internationa...
A low noise charge-sensitive preamplifier for gas proportional counters is described. In the preamplifier a simple shaping circuit was designed to improve the baseline stability at high count rates. A low thermal coefficient of the total gain was achieved...
Change and its maintenance as a result of psychotherapy was studied. The data most extensively analyzed are those collected at intake and termination. In general, it appears that patients maintain many of the gains achieved intreatment at six-months follo...
Record 5 - 10 ... High gain per unit length at 1.26 micron can be achieved in Ho-doped fluoride glass fiber due to the strong pump absorption and strong emission ...
The second in a series of evaluation handbooks prepared by the Office of Education is discussed. The viewpoint involves the review of evaluation results by interested parties and the selection of exemplary projects based on such reviews. The review and ap...
MatLab does purely numerical calculations, which can be used as a glorified ... in gaining wider insight in actual implementation of their perspective experiments. ... Based on the comparisons, recommendations for the best dosed form design ... Calibration was achieved by removing the image nonuniformity largely ...
Nov 24, 2008 ... High gain per unit length can be achieved in Ho3+-doped fluoride glass fiber due to the strong resonant pump. This type of fiber based seed ...
Aug 3, 2009 ... High gain per unit length at 1.26 micron can be achieved in Ho-doped fluoride glass fiber due to the strong pump absorption and strong ...
