Outerbridge grade IV cartilage lesions in the hip identified at arthroscopy

No abstract available

Exploration Of The Handling Qualities Of An Autonomous Unmanned Aircraft System Using A Grounded Theory Methodology Toward The Identification Of Characteristic Traits

This grounded theory study explores the handling qualities of an autonomous, large UAS based upon semi-structured interviews with eleven MQ-4C Triton air vehicle operators (AVO). Through inquiry into the tasks and difficulties experienced during operation of Triton, themes regarding the role of the AVO, the role of the automation, and the role of the interface were developed using the constant comparative method. Interconnections between the developed themes led to theory about the applicability of the handling quality framework to autonomous UAS, the tasks performed by the AVO, the human factors applied to AVO, and the relationship of the AVO to the UAS. Results showed that the command responsibilities and principles of human factors are little changed from piloted aircraft. However, the flying qualities and tasks required by the operator were seen to be significantly different, resulting in the system traits of intuitiveness, predictability, and flexibility as drivers for operator evaluation of the system. Ultimately the change to handling qualities characteristics suggests that the approach to system design for autonomous UAS should frame the interaction between the AVO and UAS as one of teamwork, which includes consideration of trust in the interaction

History, Identity Politics and Securitization: Religion\u27s Role in the Establishment of Indian-Israeli Diplomatic Relations and Future Prospects for Cooperation

This dissertation aims to provide an understanding of the historical and contemporary dynamics of India’s foreign policy towards Israel within the context of religious identity from 1947 to 2015. A historical analysis of the relationship between India and Israel exhibits the ways that religious identity has served as a primary factor impeding as well as facilitating relations between the two nations. The analysis was done within the context of the historical Hindu-Muslim relationship in India and how the legacy of this relationship, in India’s effort to maintain positive relations with the Arab-Muslim world, worked to inhibit relations with Israel prior to normalization in 1992. However, the five years leading up to normalization, and thereafter, the dynamic is reversed with this legacy playing an increasingly progressive role in India-Israel relations via the social construction of shared meanings and identities between India’s Hindu majority with Israel’s Jewish majority. Social construction of shared meanings and identities are based, in part, within an historical/modern-day context of conflict with a minority, religious Other (Islam), and through bridges of connection based in other historical, cultural, social, and religious areas. Formal interviews, archival primary-source analysis of government documents, and secondary-source review were methods employed in the evaluation of the role of religion in India’s foreign policy towards Israel. In conclusion, this dissertation demonstrates the normative and functional effects that religious identities have played, and continue to play, in determining India’s foreign policy towards Israel given the fundamental role religious identity has historically played in the structuring of social perceptions, interactions and worldviews within Indian society up and through the present-day

Evaluation of Floor Management Practices in Young Lime Orchard

Seven orchard floor management techniques were evaluated for weed control and tree growth in a newly planted 'Tahitian' lime (Citrus aurantifolia Swingle) orchard. A weeded control, mechanically mowed, polyester geotextile fabric, mulch of shredded eucalyptus (Eucalyptus robusta Sm.), mulch of shredded lychee (Litchi chinensis) leaves, hand weeding, and oxyfluorfen (2-chloro-l-(3-ethoxy-4- nitrophenoxy)-4-(trifluoromethyl) benzene) herbicide were selected to determine their suitability in a newly planted lime orchard. Thirteen months of data (weed dry weight) indicated that there were no significant differences in mean weed weight among the weed control treatments; hand weeding was the worst. At the conclusion of the experiment, tree growth was greatest with the oxyfluorfen treatment. Eucalyptus (Eucalyptus robusta Sm) organic mulch was tested at 4 different rates to assess its overall performance in a non-irrigated newly planted 'Tahitian' lime orchard. The four rates of eucalyptus mulch were 0, 100, 150, and 200 tonnes/ha. Increasing mulch rates decreased mean weed dry weight. Increasing mulch rates increased trunk and limb diameters (combined), limb length, and total leaf number. Mulch rate of 150 tonnes/ha was considered optimum for satisfactory weed suppression and enhancing tree growth. After 139 days, soil samples were collected from beneath the mulches. Ryegrass (Lolium multiflorum) and Leaf mustard cabbage (Brassica juncea L.) seeds were planted in petri dishes filled with soil. There were no significant differences in germination between the 4 rates of mulch for both species

Calibration and alignment of metrology system for the Nuclear Spectroscopic Telescope Array mission

A metrology system to measure the on-orbit movement of a ten meter mast has been built for the Nuclear Spectroscopic Telescope Array (NuSTAR) x-ray observatory. In this paper, the metrology system is described, and the performance is measured. The laser beam stability is discussed in detail. Pre-launch alignment and calibration are also described. The invisible infrared laser beams must be aligned to their corresponding detectors without deploying the telescope in Earth’s gravity. Finally, a possible method for in-flight calibration of the metrology system is described

HST/NICMOS Observations of Massive Stellar Clusters Near the Galactic Center

We report Hubble Space Telescope (HST) Near-infrared Camera and Multi-object Spectrometer (NICMOS) observations of the Arches and Quintuplet clusters, two extraordinary young clusters near the Galactic Center. For the first time, we have identified main sequence stars in the Galactic Center with initial masses well below 10 Msun. We present the first determination of the initial mass function (IMF) for any population in the Galactic Center, finding an IMF slope which is significantly more positive (Gamma approx -0.65) than the average for young clusters elsewhere in the Galaxy (Gamma approx -1.4). The apparent turnoffs in the color-magnitude diagrams suggest cluster ages which are consistent with the ages implied by the mixture of spectral types in the clusters; we find tau(age) approx 2+/-1 Myr for the Arches cluster, and tau(age) approx 4+/-1 Myr for the Quintuplet. We estimate total cluster masses by adding the masses of observed stars down to the 50% completeness limit, and then extrapolating down to a lower mass cutoff of 1 Msun. Using this method, we find > 10^4 Msun for the total mass of the Arches cluster. Such a determination for the Quintuplet cluster is complicated by the double-valued mass-magnitude relationship for clusters with ages > 3 Myr. We find a lower limit of 6300 Msun for the total cluster mass, and suggest a best estimate of twice this value which accounts for the outlying members of the cluster. Both clusters have masses which place them as the two most massive clusters in the Galaxy.Comment: accepted by ApJ higher resolution versions of figures 1 and 2 can be found at: ftp://quintup.astro.ucla.edu/nicmos1

Treatment of periscapular tendinopathy with radiofrequency coblation: a case report

Overuse injuries of the tendon – ‘tendinopathy’ – account for 30%–50% of all sporting injuries and a high proportion of orthopaedic referrals from primary care physicians. Tendinopathies often have a multifactorial aetiology and injury can be due to a combination of both acute and chronic trauma which contributes to loss of tissue integrity and eventual rupture. Our incomplete understanding of the mechanisms surrounding tendon pathophysiology continues to cause difficulties in treatments beyond loading regimes which can be unsuccessful in up to 30% of cases. We describe an uncommon case of tendinopathy affecting the periscapular muscle/tendon unit in a 35-year-old female with persistent pain around the inferior posterior pole of her right scapula. Magnetic resonance imaging findings confirmed oedema of the muscles around the inferior scapular margin in keeping with enthesopathy/tendinopathy and she was treated with radiofrequency coblation to the area. This case highlights radiofrequency ablation as a surgical option should non-operative treatments fail in the rare diagnosis of periscapular tendinopathy