An Investigation of the Natural Vacancy Rate in the Hong Kong Lodging Market

Knowing the natural vacancy rate of a real estate market can yield highly useful information regarding future price movements. Past studies have been conducted to predict natural vacancy rates for office properties, but little research has delved into natural vacancy rates for the lodging market, and even less so within Hong Kong. This study aims to provide an estimate for the natural vacancy rate in the Hong Kong lodging market from 2008 to 2016 by using previous rent adjustment models, and also to predict whether the structural rate has changed over time

Gifted Education in Arkansas: A Longitudinal Study of Gifted Status and Academic Growth

This study assesses the effectiveness of gifted programs in Arkansas by leveraging student-level achievement and demographic data of students who scored at or above the 95th percentile on state assessments in third grade. We follow five independent cohorts of these high-achieving students through eighth grade and examine the difference between the longer-term academic performance of the students that were exposed to gifted and talented services compared to similarly high achieving peers that were not identified as gifted. Using regression analyses controlling for student and district characteristics, we find that students who received gifted services demonstrated statistically significantly greater academic growth on mathematics and literacy achievement across the time period examined than similarly high achieving peers that were not identified as gifted. The study is among the few research studies conducted on gifted education programs across the state. We discuss these findings in the context of the gifted programming literature and conclude with policy suggestions

What Can we Learn about Improving Gifted Identification by Studying how Accurate the Process is in Arkansas?

How might we improve gifted and talented (G/T) identification by learning about the process in Arkansas (AR)? In this study, we examined the accuracy of the gifted identification process in AR by comparing the degree to which students who were academically talented in the top 5% on the 3 rd grade state assessment in reading and mathematics in AR were identified for G/T. Across five years of independent cohorts, we replicate the finding that roughly 30% of the students in the top 5% in both reading and mathematics on the 3 rd grade state assessment are not identified as G/T. Multivariate models indicate that high achieving students participating in the Federal Free/Reduced Lunch program were 11 percentage points less likely to be identified as G/T. Our study has policy implications for AR’s G/T screening strategies, and more broadly for G/T identification of low-income and historically marginalized groups. Using student achievement on the 3rd grade state assessment in reading and mathematics as a ‘universal screening’ tool could help these students receive the academic services they need to develop their talent to the fullest

Non-Additive Interactions Unlock Small-Particle Mobility in Binary Colloidal Monolayers

We examine the organization and dynamics of binary colloidal monolayers composed of micron-scale silica particles interspersed with smaller-diameter silica particles that serve as minority component impurities. These binary monolayers are prepared at the surface of ionic liquid droplets over a range of size ratios ($\sigma=0.16-0.66$) and are studied with low-dose minimally perturbative scanning electron microscopy (SEM). The high resolution of SEM imaging provides direct tracking of all particle coordinates over time, enabling a complete description of the microscopic state. In these bidisperse size mixtures, particle interactions are non-additive because interfacial pinning to the droplet surface causes the equators of differently sized particles to lie in separate planes. By varying the size ratio we control the extent of non-additivity in order to achieve phase behavior inaccessible to strictly 2D systems. Across the range of size ratios we tune the system from a mobile small-particle phase ($\sigma<0.24$), to an interstitial solid ($0.240.33$). These distinct phase regimes are classified through measurements of hexagonal ordering of the large-particle host lattice and the lattice's capacity for small-particle transport. Altogether, we explain these structural and dynamic trends by considering the combined influence of interparticle interactions and the colloidal packing geometry. Our measurements are reproduced in molecular dynamics simulations of 2D non-additive hard disks, suggesting an efficient method for describing confined systems with reduced dimensionality representations.Comment: 12 pages, 7 figures, also see supplementary ancillary fil

Image fusion for spatial enhancement of hyperspectral image via pixel group based non-local sparse representation

Restricted by technical and budget constraints, hyperspectral images (HSIs) are usually obtained with low spatial resolution. In order to improve the spatial resolution of a given hyperspectral image, a new spatial and spectral image fusion approach via pixel group based non-local sparse representation is proposed, which exploits the spectral sparsity and spectral non-local self-similarity of the hyperspectral image. The proposed approach fuses the hyperspectral image with a high-spatial-resolution multispectral image of the same scene to obtain a hyperspectral image with high spatial and spectral resolutions. The input hyperspectral image is used to train the spectral dictionary, while the sparse codes of the desired HSI are estimated by jointly encoding the similar pixels in each pixel group extracted from the high-spatial-resolution multispectral image. To improve the accuracy of the pixel group based non-local sparse representation, the similar pixels in a pixel group are selected by utilizing both the spectral and spatial information. The performance of the proposed approach is tested on two remote sensing image datasets. Experimental results suggest that the proposed method outperforms a number of sparse representation based fusion techniques, and can preserve the spectral information while recovering the spatial details under large magnification factors

Viewing education policy through a genetic lens

This paper introduces a literature from outside the field of education research and policy that we argue has potential to enhance both policy and practice. This field, behavioral genetics, has amassed highly replicable findings spanning more than half a century. Although no necessary policy implications follow from the evidence we review here, taking a ‘genetic lens’ may offer education researchers and policy-makers an opportunity to look at existing research in a fresh way; and to ask new questions and design new solutions. Incorporating evidence from behavioral genetics into interpretations of education and policy data can help researchers and decision makers better understand why some education policies have worked while others have not, and inform broader discussions of equality, fairness, and disadvantage in educatio

Anti-smoking policy in Hong Kong : implementation capacity, action and challenges

published_or_final_versionPolitics and Public AdministrationMasterMaster of Public Administratio

PIMASERTIB and SEROUS RETINAL DETACHMENTS

© by Ophthalmic Communications Society, Inc.Purpose: To report a case of multifocal serous retinal detachments associated with pimasertib. Methods: The authors report a 26-year-old patient who developed bilateral multifocal serous retinal detachments appearing 2 days after starting pimasertib (as part of a clinical trial investigating its use in low-grade metastatic ovarian cancer) and rapidly resolving 3 days after stopping it. Conclusion: The mechanism of MEK inhibitor induced visual toxicity remains unclear. The pathophysiology of multifocal serous retinal detachments as a complication of pimasertib is still poorly understood. Copyringhtpublished_or_final_versio

Light Curves from an Expanding Relativistic Jet

We perform fully relativistic hydrodynamic simulations of the deceleration and lateral expansion of a relativistic jet as it expands into an ambient medium. The hydrodynamic calculations use a 2D adaptive mesh refinement (AMR) code, which provides adequate resolution of the thin shell of matter behind the shock. We find that the sideways propagation is different than predicted by simple analytic models. The physical conditions at the sides of the jet are found to be significantly different than at the front of the jet, and most of the emission occurs within the initial opening angle of the jet. The light curves, as seen by observers at different viewing angles with respect to the jet axis, are then calculated assuming synchrotron emission. For an observer along the jet axis, we find a sharp achromatic `jet break' in the light curve at frequencies above the typical synchrotron frequency, at $t_{jet}\approx 5.8(E_{52}/n_1)^{1/3}(\theta_0/0.2)^{8/3}$ days, while the temporal decay index $\alpha$ ($F_{\nu}\propto t^{\alpha}$) after the break is steeper than $-p$ ($\alpha=-2.85$ for $p=2.5$). At larger viewing angles $t_{jet}$ increases and the jet break becomes smoother.Comment: 3 pages, 2 figures, oral presentation on 2nd Rome Workshop on Gamma-Ray Bursts in the Afterglow Er