Advances towards high‐resolution pack‐and‐go displays: A survey

Abstract— Tiled displays provide high resolution and large scale simultaneously. Projectors can project on any available surface. Thus, it is possible to create a large high‐resolution display by simply tiling multiple projectors on any available regular surface. The tremendous advancement in projection technology has made projectors portable and affordable. One can envision displays made of multiple such projectors that can be packed in one's car trunk, carried from one location to another, deployed at each location easily to create a seamless high‐resolution display, and, finally, dismantled in minutes to be taken to the next location — essentially a pack‐and‐go display. Several challenges must be overcome in order to realize such pack‐and‐go displays. These include allowing for imperfect uncalibrated devices, uneven non‐diffused display surfaces, and a layman user via complete automation in deployment that requires no user invention. We described the advances we have made in addressing these challenges for the most common case of planar display surfaces. First, we present a technique to allow imperfect projectors. Next, we present a technique to allow a photometrically uncalibrated camera. Finally, we present a novel distributed architecture that renders critical display capabilities such as self‐calibration, scalability, and reconfigurability without any user intervention. These advances are important milestones towards the development of easy‐to‐use multi‐projector displays that can be deployed anywhere and by anyone.     

Trench MOS barrier Schottky rectifier formed by counter-doping trench-bottom implantation

A trench MOS barrier Schottky (TMBS) rectifier has been formed by carrying out trench bottom counter-doping implantation for improving the blocking voltage and the device reliability. By additionally implementing a counter-doped region enclosing the trench bottom, the reverse blocking voltage of the conventional TMBS rectifier can be significantly enhanced without considerable degradation of on-state characteristics. In addition, the device reliability can be significantly improved. The large peak electric field in the corner of trench bottom, which limits the blocking voltage of the conventional TMBS rectifier, can be largely alleviated due to charge compensation. Though the counter-doped region enclosing the trench bottom may partly encroach into the mesa region, no considerable deterioration of on-state characteristics is caused. In addition, a too low-dose trench-bottom implantation cannot provide sufficient charge compensation, and a too high-dose trench-bottom implantation would create a large peak electric field below the trench bottom. As a result, a proper trench-bottom implantation may be employed to significantly enhance the blocking voltage without considerable degradation of on-state characteristics.     

Ultrafast Dynamics in Optimally Doped YBa2Cu3O7??? Observed with White Light Pump-probe Spectroscopy

The quasiparticle relaxation dynamics in optimally doped (001) YBa₂Cu₃O_7??? thin films were measured at various temperatures by white light pump-probe technique. The 2D ultrafast spectroscopy with broadband (??200?nm) and high time-resolution (??9 fs) was performed by the non-collinear optical parametric amplifier (NOPA). The relaxation time and the amplitude of the transient transmissivity changes (??T/T) are wavelength-dependent. The maximum ??T/T appears at around 625 nm (??1.98 eV) which corresponds to the transition between the Fermi level and the UHB (upper Hubbard band). Furthermore, the oscillations with ??150, ??320, ??500 cm^?1 have been clearly observed in the Fourier transformed graph of the 2D ultrafast spectroscopy, which are consistent with the phonon modes in Raman-scattering spectra.     

The Iron Chelator,Dp44mT,Effectively Inhibits Human Oral Squamous Cell Carcinoma Cell Growth in Vitro and in Vivo

Oral squamous cell carcinoma (OSCC) is a common malignancy with a growing worldwide incidence and prevalence. The N-myc downstream regulated gene (NDRG) family of NDRG1, 2, 3, and mammary serine protease inhibitor (Maspin) gene are well-known modulators in the neoplasia process. Current research has considered iron chelators as new anti-cancer agents; however, the anticancer activities of iron chelators and their target genes in OSCC have not been well investigated. We showed that iron chelators (Dp44mT, desferrioxamine (DFO), and deferasirox) all significantly inhibit SAS cell growth. Flow cytometry further indicated that Dp44mT inhibition of SAS cells growth was partly due to induction of G1 cell cycle arrest. Iron chelators enhanced expressions of NDRG1 and NDRG3 while repressing cyclin D1 expression in OSCC cells. The in vivo antitumor effect on OSCC and safety of Dp44mT were further confirmed through a xenograft animal model. The Dp44mT treatment also increased Maspin protein levels in SAS and OECM-1 cells. NDRG3 knockdown enhanced the growth of OECM-1 cells in vitro and in vivo. Our results indicated that NDRG3 is a tumor suppressor gene in OSCC cells, and Dp44mT could be a promising therapeutic agent for OSCC treatment.     

Reviews of Asian American education: Acculturation, literacy development, and learning: Volume 4. Research on the education of Asian and Pacific Americans and New perspectives on Asian American parents, students, and teacher recruitment: Volume 5. Research on the education of Asian and Pacific Americans.

Reviews the books, Asian American education: Acculturation, literacy development, and learning: Volume 4. Research on the education of Asian and Pacific Americans by C. Park, R. Endo, and X. L. Rong (2007) and New perspectives on Asian American parents, students, and teacher recruitment: Volume 5. Research on the education of Asian and Pacific Americans by C. Park, R. Endo, S. Lee, and X. L. Rong (2009). These two books challenge the still pervasive model minority myth that the school experiences of Asian American students are homogenous and result in one outcome—success. Asian American Education (AAE) and New Perspectives (NP) do an excellent job conveying the diversity and complexity (yes, there are of course successes, but also many challenges) of education-related issues for Asian Americans. The two books dispel the notion of a one-size-fits-all view of academic achievement in this population. One strength of the two books is that the chapters (nine in each book) cover quite a bit of ground and examine a wide range of topics. The chapters are inclusive in terms of methodology (the use of quantitative and qualitative approaches), age range of students (from elementary school to graduate school), type of student (ESL, special education, and mainstream), key players (focusing on students, parents, teachers, and school professionals), and ethnicity (pan- Asian American, Chinese, Korean, and less studied groups such as Vietnamese, Laotian, Hmong, and Burmese). Overall, the two books offer a comprehensive overview on a number of important topics—some that have been heavily researched and others breaking new ground. In summary, these two books will be useful to teachers, parents, administrators, and school professionals who want a detailed and culturally sensitive overview of important educational issues that Asian American students face. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Fully Probabilistic Framework for Evaluating Excavation-Induced Damage Potential of Adjacent Buildings

This paper presents a framework for a fully probabilistic analysis of the potential for damage to buildings adjacent to an excavation. Herein, the damage potential index (DPI), which is a function of angular distortion and lateral strain, is used to assess building damage potential. A serviceability limit state is established in which the resistance is expressed in terms of the “limiting” DPI, and the load is represented by the “applied” DPI. In this context, damage to the building adjacent to an excavation is said to occur deterministically if the applied DPI is greater than the limiting DPI. For the fully probabilistic analysis, both parameter and model uncertainties of the limiting and applied DPIs are first characterized. The analysis framework is then presented and demonstrated with a case history. Finally, sensitivity analysis is performed to identify the factors to which the probability of damage is most sensitive and to analyze the effect of various assumptions of the input parameters on the computed probability of building damage.     

Synthesis and properties of new water-soluble aliphatic hyperbranched poly(amido acids) with high pH-dependent photoluminescence

Water-soluble fluorescent hyperbranched poly(amido acids) (HBPAAs), based on wholly aliphatic structures were prepared through direct self-condensation of N-(3-aminopropyl) diethano succinate amine (APDESA, AB₂ monomer) in the presence of N,N-dicyclohexylcarbodiimide (DCC) as a condensation agent. The resulting HBPAAs were soluble in water, DMF and THF, and the structure of synthesized AB₂ monomer and polymers was confirmed by IR, ¹H, and ¹³C NMR measurements. TEM image indicated that the HBPAAs self-assembled in H₂O to form a spherical micelle with a diameter ranging from 30 to 50 nm. A significant pH-dependent profile of fluorescent intensity in the pH range from 3 to 10 was observed, wherein pH 4 provided a critical jump as the solution pH was increased. Further increasing the pH to 10 decreased the fluorescence because of partial hydrolysis. Strong fluorescence emission was observed at 395 nm in aqueous media and the fluorescence quantum yields are to 23%. These amphiphilic HBPAAs, with excellent water-solubility, void-rich space, multiple functional peripheries and high blue fluorescence, have potential uses as tracing nanocarriers and molecular-level containers.     

Finite-State Markov Chain Models for the Intensity of Nakagami Fading

For the design, analysis, and simulation of communication systems with Nakagami-m fading channels, it is very convenient to model the fading by finite-state Markov chains in which the states represent fade levels or signal-to-noise ratios in decibels. Our approach to the development of such Markov chain models is to work with the intensity of the fading process, which is proportional to the logarithm of squared envelope of the faded signal. We demonstrate that all the parameters of the Markov chains can be determined from the bivariate distribution of the intensity of the Nakagami-m fading process. Several analytical results are derived from the bivariate distribution of the intensity, including expressions for the chain’s transition probabilities for both adjacent and nonadjacent states and the asymptotic distribution of the intensity for deep fades. For several values of m, we verify the accuracy of our Markov chain models as simulation tools by comparisons of the state probabilities and level-crossing rates obtained from simulations of the Markov chain with those obtained from our analytical expressions.     

LEAD(II) EXTRACTION FROM NITRATE SOLUTIONS WITH DI(2-ETHYLHEXYL)PHOSPHORIC ACID

ABSTRACT

In this paper, equilibrium studies were carried out on the extraction of trace amounts of lead(II) from 0.2 mol/dm³ (Na,H)NO₃ aqueous solutions with di(2-ethylhexy1)phosphoric acid (HR) dissolved in n-dodecane at 298 K. The composition of the extracted species was numerically found to be and ₂. A chemical equilibrium model was developed to evaluate the thermodynamic constants for the formation of the two complexes, based on the law of mass action, which took into account the activity corrections of reactive species in the aqueous phase by employing the Bromley and the simplified Pitzer equations and those of the extractant in the organic phase.