Estimating Price Paths for Residential Real Estate

Several approaches have been used to estimate and adjust for price movements in residential real estate; however, weaknesses remain in current systems. This paper incorporates a different way of measuring temporal price patterns. The method involves a time series model, an approach not previously employed when estimating real estate price movements. Using illustrative data, it is indicated that the proposed technique is likely more accurate than current procedures. The method also represents a significant adaptation of standard time series models. For the task at hand, the new model is arguably preferable to these more standard versions.

Groundwater Flow Systems and Thermal Regimes Near Cooling Igneous Plutons: Influence of Surface Topography

Previous studies of cooling igneous plutons did not consider the possible influence of sloping surface topography. Topographically-driven fluids in high relief terrain, however, are thought to interact with deep buoyancy-driven fluids to produce large lateral-flow systems up to 5 km long and 20 km long in silicic and andesitic volcanic terrain, respectively. In this study, a quantitative investigation of the interaction of topographically-driven and buoyancy-driven fluid flow is conducted through the use of a finite element numerical model to simulate the fluid flow and thermal regimes associated with a cooling igneous pluton in the presence of significant topographic relief. The system considered in this study is that of a pluton with dimensions 2 km by 3 km and an initial temperature of 980 °C centered beneath a mountain having relief of 1 km over a horizontal distance of 3 km. Simulation results indicate that the topographic component of flow interacts with buoyancy to produce two separate flow systems, a shallow topographically-driven flow system and a deeper convecting system. The resulting hydrothermal system evolves in a more complicated fashion than in flat topography cases. In addition, the existence of the shallow topographically-driven flow system partially masks the presence of the heat source by preventing fluids having the chemical signature of the deeper, hotter environment from reaching the surface. Cooling rate of the pluton is also increased and boiling is inhibited. These effects, however, are primarily a result of the pluton being injected into a cooler host rock. The host rock is cooler in the sloping topography case due to advective cooling prior to pluton injection. Model results also indicate that temperature beneath the mountain and the position of the zone of mixing remain relatively constant for almost 50,000 years. The stability of the temperature conditions and the position of the zone of mixing may increase the likelihood for the deposition of epithermal ore bodies in this region

Rethinking Disability in the Private Sector: Report from the Panel on Labour Market Opportunities for Persons with Disabilities

In July 2012, the Government of Canada appointed a panel to consult with private sector employers, as well as other organizations and individuals, on the labour market participation of people with disabilities. The panel members were asked to identify successes and best practices in the employment of people with disabilities, as well as the barriers faced by employers, and to report on their findings. In-person and telephone consultations were conducted with almost 70 employers, and feedback was received from approximately 130 online submissions. Responses came from organizations of all sizes across the country and in a broad range of industry sectors. Findings were shared anonymously with a number of national non-profit organizations and business associations to determine if they resonated with other stakeholders. While the consultations were the main focus of the panel’s efforts, research was also conducted into the business case associated with hiring people with disabilities in Canada and other jurisdictions. This report is directed at Canadian private sector employers, and offers the following findings: Many companies are doing great things, but more education and training are needed (see “Employers speak”). While most of the companies we heard from showed a genuine desire to hire people with disabilities, education and training are required to overcome barriers, dispel myths and put theory into practice. As the examples of forward-thinking Canadian companies and their best practices testify, there is significant experience available on which to build. Hiring people with disabilities is good for business. (see “Understanding the business case”). We heard this from senior and experienced business leaders who recognize the value of an inclusive work environment. Although mainly intuitive, their beliefs are supported by the performance of corporate diversity leaders on the capital markets, as well as data on employee retention and productivity. It is noteworthy that in 57 percent of cases, no workplace accommodation is required for people with disabilities. In the 37 percent of cases reporting a one-time cost to accommodate an employee with a disability, the average amount spent is $500. The keys to success are leadership and effective community partnerships (see “Making it work for you”). To increase employment among people with disabilities and access the related benefits, tone from the top and the actions of leaders are imperative. Also critical is identifying community partners who fully understand the business’s talent needs and are committed to customer service. To help organizations begin the process of engaging and employing talented people with disabilities, this section also includes a list of initiatives called “Getting started.

The Yoga of the Haṭhābhyāsapaddhati: Haṭhayoga on the Cusp of Modernity

The Haṭhābhyāsapaddhati is a Sanskrit text on the practice of Haṭhayoga, probably composed in the eighteenth century in Maharashtra. This article discusses, among other things, the dating, authorship, sectarian affiliation, and unique features of the text, its relationship to other yoga texts, and its significance for the history of modern yoga. The most remarkable feature of this text is its section on āsana (yogic posture), which contains six groups of postures, many of which are unusual or unique among yoga texts. Another unique feature of this section is that the postures appear to be arranged into sequences intended to be practised in order. A manuscript of the text exists in the Mysore Palace; this (possibly along with other texts) was the basis for the illustrated āsana descriptions in Mysore’s famous book, the Śrītattvanidhi. As we discuss, it is highly likely that the Haṭhābhyāsapaddhati was known to the most influential teacher of ‘modern postural yoga,’ T. Krishnamacharya, and therefore has a special significance for certain schools of transnational yoga

Extrinsic Evaluation of Machine Translation Metrics

Automatic machine translation (MT) metrics are widely used to distinguish the translation qualities of machine translation systems across relatively large test sets (system-level evaluation). However, it is unclear if automatic metrics are reliable at distinguishing good translations from bad translations at the sentence level (segment-level evaluation). In this paper, we investigate how useful MT metrics are at detecting the success of a machine translation component when placed in a larger platform with a downstream task. We evaluate the segment-level performance of the most widely used MT metrics (chrF, COMET, BERTScore, etc.) on three downstream cross-lingual tasks (dialogue state tracking, question answering, and semantic parsing). For each task, we only have access to a monolingual task-specific model. We calculate the correlation between the metric's ability to predict a good/bad translation with the success/failure on the final task for the Translate-Test setup. Our experiments demonstrate that all metrics exhibit negligible correlation with the extrinsic evaluation of the downstream outcomes. We also find that the scores provided by neural metrics are not interpretable mostly because of undefined ranges. We synthesise our analysis into recommendations for future MT metrics to produce labels rather than scores for more informative interaction between machine translation and multilingual language understanding.Comment: ACL 2023 Camera Read

Acupuncture for chronic neck pain: a pilot for a randomised controlled trial

Background: Acupuncture is increasingly being used for many conditions including chronic neck pain. However the evidence remains inconclusive, indicating the need for further well-designed research. The aim of this study was to conduct a pilot randomised controlled parallel arm trial, to establish key features required for the design and implementation of a large-scale trial on acupuncture for chronic neck pain. Methods: Patients whose GPs had diagnosed neck pain were recruited from one general practice, and randomised to receive usual GP care only, or acupuncture ( up to 10 treatments over 3 months) as an adjunctive treatment to usual GP care. The primary outcome measure was the Northwick Park Neck Pain Questionnaire (NPQ) at 3 months. The primary analysis was to determine the sample size for the full scale study. Results: Of the 227 patients with neck pain identified from the GP database, 28 (12.3%) consenting patients were eligible to participate in the pilot and 24 (10.5%) were recruited to the trial. Ten patients were randomised to acupuncture, receiving an average of eight treatments from one of four acupuncturists, and 14 were randomised to usual GP care alone. The sample size for the full scale trial was calculated from a clinically meaningful difference of 5% on the NPQ and, from this pilot, an adjusted standard deviation of 15.3%. Assuming 90% power at the 5% significance level, a sample size of 229 would be required in each arm in a large-scale trial when allowing for a loss to follow-up rate of 14%. In order to achieve this sample, one would need to identify patients from databases of GP practices with a total population of 230,000 patients, or approximately 15 GP practices roughly equal in size to the one involved in this study (i.e. 15,694 patients). Conclusion: This pilot study has allowed a number of recommendations to be made to facilitate the design of a large-scale trial, which in turn will help to clarify the existing evidence base on acupuncture for neck pain

Evaluating the relationship between impervious surfaces within watersheds and coastal water quality on Virginia’s Eastern Shore

The overall objective of this research is to determine the relationship between the percent of a watershed covered by impervious surfaces and water quality in tidal creeks on the Eastern Shore of Virginia in an effort to provide local governments and citizens guidance in developing zoning plans. Our specific objectives were to: (1) Determine the relationships between percent impervious surface in a watershed and concentrations of suspended sediments, nitrogen, phosphorus, chlorophyll a and fecal coliform bacteria in tidal creek headwaters; (2) Examine these relationships with and without the inclusion of tomato cultivation to determine whether it should be included in the determination of percent impervious surface within a watershed