The Predictability of REIT Returns and Market Segmentatio

A two-factor regression model was used to examine the relationship between returns on healthcare equity REITs (EREITs) and healthcare stocks from 1985 to 1992. General stock indices were incorporated in the model to account for the influence of the market. Multiple positive contemporaneous relationships were found between six of the seven REITs studied and portfolios of other healthcare stocks. Furthermore, in four of the six REITs with positive results, significant correlations were evident between individual REIT portfolios and the SIC indices with which they showed a significant relationship. These results are consistent with a common factor or factors affecting the returns of both healthcare EREITs and stocks. The relationships found between returns on healthcare EREITs and healthcare stocks, especially the correlation between the classification of the EREIT portfolios and SIC indices, indicate the importance of real estate management for healthcare firms and asset subclassification choice for the real estate manager. Although this study specifically investigated healthcare EREITs and healthcare stocks, the results may be more widely applicable to other single-property-type EREITs.

Letter from D. S. Myer to Senator Langer Regarding Demands by James Black Dog et al. for an Audit of All Tribal Moneys Collected and Expended since 1910, March 5, 1952

This letter, dated March 5, 1952, from D. S. Myer, Commissioner of the United States (US) Bureau of Indian Affairs to US Senator William Langer, makes reference to Langer\u27s letter of February 14 describing a resolution shown to Langer by James Black Dog of Elbowoods, North Dakota demanding an audit of all tribal funds collected and expended by the Three Affiliated Tribes since 1910. Myer explains that prior to June 29, 1936 authority to administer funds was vested in the US Department of the Interior, and since then the Constitution and bylaws of the Three Affiliated Tribes have provided for annual audits and the maintenance of accurate and complete public accounts of the affairs of the tribes, (emphasis in original) including credits, debts, debits and assignments, as well as an annual report and balance sheet submitted to the Bureau of Indian Affairs. Myer writes that, given the exiting audits and documentation, an audit by the US Department of the Interior should not be necessary. Myer goes on to address Black Dog\u27s request for information regarding interest earned on the monies paid to the tribe in return for lands taken in connection with the construction of the Garrison Dam, explaining the interest rates and policies regarding the use of principal and interest, before enumerating the efforts made by the Tribal Council and Bureau of Indian Affairs to keep tribal members informed on the particulars related to tribal funds in general and funds related to the compensation for damages associated with Garrison Dam in particular.https://commons.und.edu/burdick-papers/1462/thumbnail.jp

Momentum Transfer to a Simplified Wind Turbine Blade

This project looks into the potential of simplified simulations as a supplement to wind turbine blade designs. The idea is to take a two-dimensional representation of a wind turbine blade and attempt to use a fluid flow simulation to determine which aspect ratio is the most efficient in the transfer of momentum. This is then compared to the current requirements for wind turbine blades to judge how accurate the simulation was. It was found that an aspect ratio of 16.66 percent was most efficient, however when compared to the requirements for a wind turbine blade this ratio only falls into the requirements for a wind turbine tip. The largest reason for a disparity is due to the research not considering the requirements for the load that parts of the blade must hold, which means that the root section and wing section, to an extent, sacrifice efficiency in order to be able to hold the necessary weight. Due to this, the simulation tested here is insufficient for testing a root or blade section. However if the load-bearing requirement was taken care of in the design process or if the design being tested does not have such a requirement, then a simple simulation is sufficient for testing efficiency

Injury Risk Estimation Expertise: Interdisciplinary Differences in Performance on the ACL Injury Risk Estimation Quiz

Background: Simple observational assessment of movement is a potentially low-cost method for anterior cruciate ligament (ACL) injury screening and prevention. Although many individuals utilize some form of observational assessment of movement, there are currently no substantial data on group skill differences in observational screening of ACL injury risk. Purpose/Hypothesis: The purpose of this study was to compare various groups’ abilities to visually assess ACL injury risk as well as the associated strategies and ACL knowledge levels. The hypothesis was that sports medicine professionals would perform better than coaches and exercise science academics/students and that these subgroups would all perform better than parents and other general population members. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 428 individuals, including physicians, physical therapists, athletic trainers, strength and conditioning coaches, exercise science researchers/students, athletes, parents, and members of the general public participated in the study. Participants completed the ACL Injury Risk Estimation Quiz (ACL-IQ) and answered questions related to assessment strategy and ACL knowledge. Results: Strength and conditioning coaches, athletic trainers, physical therapists, and exercise science students exhibited consistently superior ACL injury risk estimation ability (þ2 SD) as compared with sport coaches, parents of athletes, and members of the general public. The performance of a substantial number of individuals in the exercise sciences/sports medicines (approximately 40%) was similar to or exceeded clinical instrument-based biomechanical assessment methods (eg, ACL nomogram). Parents, sport coaches, and the general public had lower ACL-IQ, likely due to their lower ACL knowledge and to rating the importance of knee/thigh motion lower and weight and jump height higher. Conclusion: Substantial cross-professional/group differences in visual ACL injury risk estimation exist. The relatively profound differences in injury risk estimation accuracy and their potential implications for risk screening suggest the need for additional training and outreach

Cross-professional differences in real-time assessment of ACL injury risk

Simple visual inspection of movement is a potentially low cost method for anterior cruciate ligament (ACL) injury screening and prevention. Although many professionals, athletes, and coaches utilize some form of visual inspection of movement/injury risk, there is currently no substantial data on group skill differences. Sports medicine professionals, exercise science students/academics, and strength and conditioning coaches exhibited consistently superior ACL injury risk estimation skill compared to sport coaches, parents of athletes and the general public (about 2 standard deviations). In addition, many individuals’ visual risk assessment accuracy was similar to or exceeded clinical instrument-based biomechanical assessment methods (i.e., ACL nomogram). Perceptual-cognitive mechanisms are discussed

Frio Brine Pilot: lessons learned and questions restated

Bureau of Economic Geolog

Reflective liquid crystal light valve with hybrid field effect mode

There is disclosed a high performance reflective mode liquid crystal light valve suitable for general image processing and projection and particularly suited for application to real-time coherent optical data processing. A preferred example of the device uses a CdS photoconductor, a CdTe light absorbing layer, a dielectric mirror, and a liquid crystal layer sandwiched between indium-tin-oxide transparent electrodes deposited on optical quality glass flats. The non-coherent light image is directed onto the photoconductor; this reduces the impedance of the photoconductor, thereby switching the AC voltage that is impressed across the electrodes onto the liquid crystal to activate the device. The liquid crystal is operated in a hybrid field effect mode. It utilizes the twisted nematic effect to create a dark off-state (voltage off the liquid crystal) and the optical birefringence effect to create the bright on-state. The liquid crystal thus modulates the polarization of the coherent read-out or projection light responsively to the non-coherent image. An analyzer is used to create an intensity modulated output beam

Visual estimation of ACL injury risk: Efficient assessment method, group differences, and expertise mechanisms

Simple observational assessment of movement quality (e.g., drop vertical jump biomechanics) is an efficient and low cost method for anterior cruciate ligament (ACL) injury screening and prevention. A recently developed test (see www.ACL-IQ.org) has revealed substantial cross-professional/group differences in visual ACL injury risk estimation skill. Specifically, parents, sport coaches, and to some degree sports medicine physicians, would likely benefit from training or the use of decision support tools. In addition, expertise mechanisms (perceptual-cognitive characteristics of skilled performers) were investigated in order to design training systems to improve risk estimation performance

Reliability of the tuck jump injury risk screening assessment in elite male youth soccer players

Altered neuromuscular control has been suggested as a mechanism for injury in soccer players. Ligamentous injuries most often occur during dynamic movements, such as decelerations from jump-landing maneuvers where high risk movement patterns are present. The assessment of kinematic variables during jump-landing tasks as part of a pre-participation screen is useful in the identification of injury risk. An example of a field-based screening tool is the repeated tuck jump assessment. The purpose of this study was to analyze the within-subject variation of the tuck jump screening assessment in elite male youth soccer players. 25 pre and 25 post-peak height velocity (PHV) elite male youth soccer players from the academy of a professional English soccer club completed the assessment. A test, re-test design was used to explore the within-subject inter-session reliability. Technique was graded retrospectively against the 10-point criteria set out in the screening protocol using two-dimensional video cameras. The typical error range reported for tuck jump total score (0.90 – 1.01 in pre and post-PHV players respectively) was considered acceptable. When each criteria was analyzed individually, Kappa coefficient determined that knee valgus was the only criterion to reach substantial agreement across the two test sessions for both groups. The results of this study suggest that although tuck jump total score may be reliably assessed in elite male youth soccer players, caution should be applied in solely interpreting the composite score due to the high within-subject variation in a number of the individual criteria. Knee valgus may be reliably used to screen elite youth male soccer players for this plyometric technique error and for test, re-test comparison