1,674 research outputs found
No âGiftâ Giving Here: The Inadequate Gifted Education Programs in New York State and the Need for Gifted Education Reform
Gifted Education is a topic that is often not at the forefront of educational issues throughout federal and state discussions and legislative actions. However, while there are a large number of students in classrooms across the country who are âgifted,â the number of individual states with comprehensive gifted programs within their public school districts is small. As a result, gifted programming is limited and gifted students are not guaranteed any sort of academic assistance beyond that of a standard classroom curriculum for their designated grade levels. More importantly, in the majority of states, including New York, the legal protections offered to gifted students are extremely limited, translating to the reality that those students are sitting in classrooms unengaged for years. Eventually, many gifted students are no longer within the four walls of the classroom because they have resorted to dropping out of school all together. This Note argues that New Yorkâs current laws covering gifted education are inadequate and need to be reformed in order to adequately protect gifted students within the state. A proposal is made for New York to amend its laws and follow the Pennsylvania approach to gifted education. The Pennsylvania model mandates the implementation of a Gifted Individualized Education Program as well as the requirement that all public school districts within the state maintain gifted programs for students in kindergarten through twelfth grade. This amendment to the law would help ensure that gifted students in New York receive educational services tailored to their individualized learning needs. It will also afford adequate legal recourse to help guarantee that such gifted services are provided, much like the protections afforded to special education students in the state and nationwide
Factors Influencing White-Tailed Deer Mortality Risk within a Multi-Predator System in Michigan, USA
I monitored cause-specific mortality and factors influencing mortality risk for white-tailed deer in the Upper Peninsula of Michigan, USA, during two high mortality risk periods: adult female deer during FebâMay, and fawns from birth to 6 months. I observed high rates of predation and starvation for adult female deer during AprâMay, suggesting that late winter represents a survival bottleneck due to nutritional declines. A strong negative relationship existed between snow free days during late winter and mortality risk. Predation was the dominant mortality source for fawns but predation risk decreased with larger birth mass. Black bears and coyotes accounted for most fawn kills at the population level, but wolves and bobcats had greatest per-individual fawn kill rates. My results suggest predation was the dominant mortality source for fawns and adult female deer, but multiple predator species were important and nutritional condition of deer influenced their vulnerability to predation
Efficient Peltier refrigeration by a pair of normal metal/ insulator/superconductor junctions
We suggest and demonstrate in experiment that two normal metal /insulator/
superconductor (NIS) tunnel junctions combined in series to form a symmetric
SINIS structure can operate as an efficient Peltier refrigerator. Specifically,
it is shown that the SINIS structure with normal-state junction resistances 1.0
and 1.1 k is capable of reaching a temperature of about 100 mK starting
from 300 mK. We estimate the corresponding cooling power to be 1.5 pW per total
junction area of 0.8 m at mK.Comment: 7 pages, revtex, 3 figures by fax/conventional mail upon reques
Efficient Beamspace Eigen-Based Direction of Arrival Estimation schemes
The Multiple SIgnal Classification (MUSIC) algorithm developed in the late 70\u27s was the first vector subspace approach used to accurately determine the arrival angles of signal wavefronts impinging upon an array of sensors. As facilitated by the geometry associated with the common uniform linear array of sensors, a root-based formulation was developed to replace the computationally intensive spectral search process and was found to offer an enhanced resolution capability in the presence of two closely-spaced signals. Operation in beamspace, where sectors of space are individually probed via a pre-processor operating on the sensor data, was found to offer both a performance benefit and a reduced computationa1 complexi ty resulting from the reduced data dimension associated with beamspace processing. Little progress, however, has been made in the development of a computationally efficient Root-MUSIC algorithm in a beamspace setting. Two approaches of efficiently arriving at a Root-MUSIC formulation in beamspace are developed and analyzed in this Thesis. In the first approach, a structura1 constraint is placed on the beamforming vectors that can be exploited to yield a reduced order polynomial whose roots provide information on the signal arrival angles. The second approach is considerably more general, and hence, applicable to any vector subspace angle estimation algorithm. In this approach, classical multirate digital signal processing is applied to effectively reduce the dimension of the vectors that span the signal subspace, leading to an efficient beamspace Root-MUSIC (or ESPRIT) algorithm. An auxiliaay, yet important, observation is shown to allow a real-valued eigenanalysis of the beamspace sample covariance matrix to provide a computational savings as well as a performance benefit, particularly in the case of correlated signal scenes. A rigorous theoretical analysis, based upon derived large-sample statistics of the signal subspace eigenvectors, is included to provide insight into the operation of the two algorithmic methodologies employing the real-valued processing enhancement. Numerous simulations are presented to validate the theoretical angle bias and variance expressions as well as to assess the merit of the two beamspace approaches
Stability of mode-locked kinks in the ac driven and damped sine-Gordon lattice
Kink dynamics in the underdamped and strongly discrete sine-Gordon lattice
that is driven by the oscillating force is studied. The investigation is
focused mostly on the properties of the mode-locked states in the {\it
overband} case, when the driving frequency lies above the linear band. With the
help of Floquet theory it is demonstrated that the destabilizing of the
mode-locked state happens either through the Hopf bifurcation or through the
tangential bifurcation. It is also observed that in the overband case the
standing mode-locked kink state maintains its stability for the bias amplitudes
that are by the order of magnitude larger than the amplitudes in the
low-frequency case.Comment: To appear in Springer Series on Wave Phenomena, special volume
devoted to the LENCOS'12 conference; 6 figure
Two coupled Josephson junctions: dc voltage controlled by biharmonic current
We study transport properties of two Josephson junctions coupled by an
external shunt resistance. One of the junction (say, the first) is driven by an
unbiased ac current consisting of two harmonics. The device can rectify the ac
current yielding a dc voltage across the first junction. For some values of
coupling strength, controlled by an external shunt resistance, a dc voltage
across the second junction can be generated. By variation of system parameters
like the relative phase or frequency of two harmonics, one can conveniently
manipulate both voltages with high efficiency, e.g., changing the dc voltages
across the first and second junctions from positive to negative values and vice
versa.Comment: 15 pages, 7 figures, to appear in J. Phys. Condens. Matter (2012
CUSTOMIZING STANDARD SOFTWARE AS A BUSINESS MODEL IN THE IT INDUSTRY: THE ROLE OF INTER-ORGANIZATIONAL NETWORKS AND OPEN INNOVATION
This research studies a new business model in the IT industry, the customization of standard software as the sole foundation for a software company's earnings. Based on a theoretical background which combines the concepts of inter-organizational networks and open innovation we provide an interpretive case study of a small software company which customizes a standard product. We investigate the company's interactions with a large global software company which is the producer of the original software product and with other companies which are involved in the software customization process. We find that the customizing company and software customizations depend not only on initiatives which are set off internally in the company, but on how the customizing organization's inter-organizational network and interaction with other organizations is built up. The case company has built its network primarily on complex, formal partnerships, in which also opportunistic behavior occurs and where informal relations are invaluable sources of knowledge. In addition, the original software producer's view and treatment of these companies has a vital impact on the customizing company's practice which is influenced by the open innovation initiatives which the producer of the original software instigates
VerÀnderung der Effizienz der Regenwurmaustreibung mit Senfsuspensionen im Tagesverlauf
We tested the effect of sampling time on the efficiency of mustard extractions for earthworms in a field study. On an organic experimental farm (alluvial loams; Hennef/Germany) earthworm extractions were started on two consecutive days hourly from 10 am to 5 pm and 6 pm respectively. Significant effects of daytime on extracted earthworm biomass occurred on both days. Maximum biomass was extracted in the early afternoon in each case. Additional pot experiments have shown a significant temperature dependence of the mustard extraction method which at least partially explains the differences in on-site extracted earthworm biomass in the course of the day. We conclude that daytime has to be considered as a factor when using mustard extraction methods. When used in factorial field experiments, the extractions in different field plots should therefore be operated simultaneously
- âŠ