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1

A biomechanical modelof the arthrosis of the hip joint - biomed 2011.  

PubMed

The hip joint has been investigated in depth, but causes of algic (pain) phenomena, especially those apparently located at the knee (referred pain), still remain unclear. Using a bi-dimensional multi-body model we investigated the effect of arthrosis on the kinematic of the hip joint and its relationship to pain. The bone was modeled as a rigid structure whereas the capsule and cartilage were assumed to be deformable. The effects of arthrosis were simulated as reduction of the thickness of the deformable tissues and increased friction. The extension velocity of the rectus femori and the trajectory of the instantaneous center of rotation (ICR) were examined for both physiological conditions and advanced degrees of arthrosis.In physiological conditions, results show that the extension velocity of the muscle has slight irregularities but is nevertheless continuous. The presence of arthrosis leads to a localized increase in friction and the model shows a migration of the location of the ICR toward the acetabulum. Changes in the ICR due to irregular surface friction, cartilage erosion as well as lack of synovial fluid, which in normal conditions ensures boundary film lubrication, induce discontinuities in the extension velocity of the muscle which are detected by the proprioceptive system (e.g. Golgi tendon organ) generating algic phenomena.The results of the model confirmed these findings and how hip arthrosis, in producing changes in the extension velocity of the muscle and in the kinematic of the movement, results in muscle and tendon pain around the knee. PMID:21525634

Pascolo, Paolo B; Rossi, Rubens

2011-01-01

2

Osteoarthritis of the spine: the facet joints  

PubMed Central

Osteoarthritis (OA) of the spine involves the facet joints, which are located in the posterior aspect of the vertebral column and, in humans, are the only true synovial joints between adjacent spinal levels. Facet joint osteoarthritis (FJ OA) is widely prevalent in older adults, and is thought to be a common cause of back and neck pain. The prevalence of facet-mediated pain in clinical populations increases with increasing age, suggesting that FJ OA might have a particularly important role in older adults with spinal pain. Nevertheless, to date FJ OA has received far less study than other important OA phenotypes such as knee OA, and other features of spine pathoanatomy such as degenerative disc disease. This Review presents the current state of knowledge of FJ OA, including relevant anatomy, biomechanics, epidemiology, and clinical manifestations. We present the view that the modern concept of FJ OA is consonant with the concept of OA as a failure of the whole joint, and not simply of facet joint cartilage. PMID:23147891

Gellhorn, Alfred C.; Katz, Jeffrey N.; Suri, Pradeep

2014-01-01

3

[Lumbosacral facet syndrome: functional and organic disorders of lumbosacral facet joints].  

PubMed

Disorders of lumbosacral (LS) facet joints are manifested by low back pain with or without referred leg pain and decreased mobility of the LS spine (LS facet syndrome). The most frequent causes of LS facet syndrome are functional disorders (functional blockade or dysfunction of facet joint=reversible restriction of facet joint movements caused by meniscoid entrapment) and degenerative changes of facet joints while the others are less frequent (spondyloarthropathies, infection, tuberculosis, synovial cyst, injury). Although it has been proven that the facet joints are one of the most frequent sources of chronic low back pain (15-45%), the fact is that the facet syndrome has been frequently overlooked in patients with chronic low back pain. Following are the main reasons for explaining why the facet syndrome has been overlooked in patients with chronic low back pain: 1. Facet joints disorders are manifested by non-specific clinical picture, 2.Diagnosis of facet syndrome cannot be established by either the conventional clinical examination or radiological examinations, 3. A very small number of doctors are practicing manual functional examination which can establish the diagnosis of facet joint dysfunction and 4. Diagnostic anesthetic block which can confirm the facet syndrome diagnosis is not a widely accessible method. There is a lack of research in frequency of facet syndrome in patients with acute low back pain. Chronic mechanical low back pain caused by dysfunction of several structurally unchanged facet joints can have the same features as the inflammatory pain which can result in misdiagnosis of spondyloarthropathy. Acute LS facet syndrome caused by dysfunction of facet joints responds very well to manual therapy. The most important therapeutic options in patients with chronic LS facet syndrome caused by degenerative changes and/or dysfunction of facet joints are manual therapy, kinesiotherapy (flexion exercises), therapeutic blocks and radiofrequency denervation. The article describes etiopathogenesis, clinical manifestations, diagnosis, differential diagnosis and therapy of LS facet syndrome with emphasis on functional disorders of facet joints that can cause particular diagnostic and therapeutic problems. PMID:22165083

Grgi?, Vjekoslav

2011-01-01

4

Percutaneous Vertebroplasty and Facet Joint Block  

PubMed Central

It is surprising that about 24% of patients with benign osteoporotic vertebral fracture die within a year from respiratory infection and urinary tract infection because of coughing and voiding difficulties, depending on the sites of compression fractures. We reviewed 500 patients on whom percutaneous vertebroplasty (PVP) was performed, at 612 levels in terms of patient selection, operation technique, medication, and clinical outcomes during the follow-up course for 2 yr study period. To confirm the most painful level among the multiple fracture sites, physical examination after facet joint block under the fluoroscope was the most reliable method. The mean total lumbar spine fracture threshold of bone mineral density was 0.81±0.05 g/cm2. The mean changes of numeric rating scale scores, Oswestry Disability Index except sex life, and Karnofsky performance status were -72.00, -83.50 and +60.62% in the osteoporosis group and -51.89, -45.02, and 69.03% in the tumor group. Complications related to the procedure were lateral spinal cord damage, transient paresthesia and transient hypotension. PVP with facet joint block is a profitable method for the vertebral compression fracture because of low risk and short duration of procedure with a high chance to result in pain relief and early mobilization. PMID:16361816

Kim, Tae-Kyun; Kim, Cheul-Hong; Shin, Sang-Wook; Kwon, Jae-Young; Kim, Hae-Kyu; Baik, Seong-Wan

2005-01-01

5

Biomechanical characterisation of ovine spinal facet joint cartilage.  

PubMed

The spinal facet joints are known to be an important component in the kinematics and the load transmission of the spine. The articular cartilage in the facet joint is prone to degenerative changes which lead to back pain and treatments for the condition have had limited long term success. There is currently a lack of information on the basic biomechanical properties of the facet joint cartilage which is needed to develop tissue substitution or regenerative interventions. In the present study, the thickness and biphasic properties of ovine facet cartilage were determined using a combination of indentation tests and computational modelling. The equilibrium biphasic Young's modulus and permeability were derived to be 0.76±0.35 MPa and 1.61±1.10×10?¹? m?/(Ns) respectively, which were within the range of cartilage properties characterised from the human synovial joints. The average thickness of the ovine facet cartilage was 0.52±0.10 mm, which was measured using a needle indentation test. These properties could potentially be used for the development of substitution or tissue engineering interventions and for computational modelling of the facet joint. Furthermore, the developed method to characterise the facet cartilage could be used for other animals or human donors. PMID:22483055

Abd Latif, Mohd Juzaila; Jin, Zhongmin; Wilcox, Ruth K

2012-05-11

6

Uncovertebral joint injury in cervical facet dislocation: the headphones sign  

Microsoft Academic Search

The purpose of our study is to demonstrate the uncovertebral mal-alignment as a reliable indirect sign of cervical facet joint\\u000a dislocation. We examined the uncovertebral axial plane alignment of 12 patients with unilateral and bilateral cervical facet\\u000a joint dislocation (UCFJD and BCFJD, respectively), comparing its frequency to the reverse hamburger bun sign on CT and MR\\u000a axial images. Of the

Francesco Palmieri; Victor N. Cassar-Pullicino; Claudia Dell’Atti; Radhesh K. Lalam; Bernhard J. Tins; Prudencia N. M. Tyrrell; Iain W. McCall

2006-01-01

7

Three-dimensional evaluation of the facet joints  

NASA Astrophysics Data System (ADS)

Computerized tomography and magnetic resonance imaging nave revolurionalized analysis of vertebral anatomy and pathology. Further advances with 3-dimensional imaging have recently become an important adjunct for diagnosis and treatment in structural abnormalities. Facets are intimately related to their surrounding musculature and malalignment may cause pain directly or indirectly. High resolution 3-dimensional reformations of CT Scans give us new insight on structure and function of facet joints, since their motion and architecture are ever complex. It is well documented in the literature that facet joint biomecnanics is a partial contributor to the myriad at causes of low back The term "facet Joint syndrome" was coined in 1933 by GhorMley.3 The osteopathic lesion complex is well defined by LeRoy and McCole and comparison of roentgenographic findings before and after manipulation has teen described by Long and Lioyd.4,5 since alterations in facet biamechanics are an important aspect of osteopathic manipulative therapy (OT), 3-dimensional hign resolution imaging will prove to be a great asset in osteopathic research. Rotating the spine allows for different viewing perspectives to provide optimal and consistent measurements of the facet joint. Rotations are performed on the X, Y and 7, axis and measurements pre and post-manipulation are performed and compared on matching axis and perspectives. Rotation about the X, Y and Z axis help appreciate the 3-dimensionality of the vertebral column to project to the viewer a feeling that the spine is floating in space before them. This does give the viewer a 3-D understanding of the object however, only at a perspective at a Lime.

Folio, Les R.

1990-04-01

8

Unilateral lumbar facet joint hypertrophy causing nerve root irritation.  

PubMed

We present four cases of massive unilateral lumbar facet joint hypertrophy in an otherwise morphologically normal spine. All presented with a combination of low back pain and symptoms of entrapment of a single lumbar nerve root. The abnormality is best visualised by CT scanning and the results of surgical decompression by partial undercutting facetectomy are favourable. PMID:3190129

Wilde, G P; Szypryt, E P; Mulholland, R C

1988-09-01

9

Arthritis of the subtalar joint associated with sustentaculum tali facet configuration.  

PubMed Central

The articular facets of the sustentaculum tali have a variety of configurations that are generally viewed as nonmetric traits of little functional significance. Bruckner (1987), in contrast, has hypothesised that sustentaculum tali facet variations are functionally important because they influence subtalar joint stability. To test this hypothesis, 191 calcanei were analysed for correlations between sustentaculum tali facet morphology and osteoarthritis of the subtalar joint. Calcanei with 2 separate sustentaculum tali facets had a lower frequency of arthritic changes associated with joint instability than calcanei with other facet configurations. This finding supports Bruckner's hypothesis that subtalar joint facet configuration is a factor in foot mobility. PMID:8300440

Drayer-Verhagen, F

1993-01-01

10

Unilateral lumbar facet joint hypertrophy causing nerve root irritation.  

PubMed Central

We present four cases of massive unilateral lumbar facet joint hypertrophy in an otherwise morphologically normal spine. All presented with a combination of low back pain and symptoms of entrapment of a single lumbar nerve root. The abnormality is best visualised by CT scanning and the results of surgical decompression by partial undercutting facetectomy are favourable. Images fig. 1 fig. 2 fig. 3 fig. 4 PMID:3190129

Wilde, G. P.; Szypryt, E. P.; Mulholland, R. C.

1988-01-01

11

Facet joint laser radiation: tissue effects of a new clinical laser application  

NASA Astrophysics Data System (ADS)

Chronic unilateral and bilateral back pain with pseudoradicular symptoms, is a common clinical syndrome, which in many cases can be related to the facet joint syndrome. The pain is caused by mechanical affection of synovial and capsular nerve terminals. Therefore, current therapeutical attempts including physical therapy, intra-articular injection of local anesthetics and steroids and thermocoagulation of the facet joint with a thermocoagulator, are performed. We confirmed laser coagulation of the facet joint. Porcine cadaveric spines were treated immediately after death by intra-articular facet joint laser radiation. With the pulsed Nd:YAG laser (1064 nm) altogether 600 J were applied in three different places 4 mm apart at the top of the facet joint. The results showed that facet joint laser radiation leads to a small (about 1 - 2 mm diameter) lesion restricted to the facet joint cavity and its synovia. Histologically, we found a central carbonization zone and necrosis, including almost the whole cartilage and approximately 0.2 mm of the adjacent bone. These changes are similar to Nd:Yag-laser applications in other skeletal regions. It is suggested that these changes may lead to facet joint denervation by coagulation of the synovial nerve terminals. Cicatration of the laser lesion might cause ankylosis of this joint. In sum, facet joint laser radiation could be an alternative therapeutical tool for lower back pain of the facet joint syndrome type. Therefore, future clinical application of this technique seems to be very promising.

Werkmann, Klaus; Thal, Dietmar R.

1996-01-01

12

Percutaneous CT-Guided Treatment of Lumbar Facet Joint Synovial Cysts  

Microsoft Academic Search

Symptomatic intraspinal lumbar facet joint synovial cysts can be managed both conservatively and surgically. Diagnosis of\\u000a the lumbar facet joint cyst is made through cross-sectional imaging of the spine, either by computerized tomography (CT) scan,\\u000a myelography, or most commonly magnetic resonance imaging. Conservative treatment by facet joint injection can be performed\\u000a under fluoroscopic or CT guidance, although only CT guidance

Anthony Chang

2009-01-01

13

Percutaneous CT-guided treatment of lumbar facet joint synovial cysts.  

PubMed

Symptomatic intraspinal lumbar facet joint synovial cysts can be managed both conservatively and surgically. Diagnosis of the lumbar facet joint cyst is made through cross-sectional imaging of the spine, either by computerized tomography (CT) scan, myelography, or most commonly magnetic resonance imaging. Conservative treatment by facet joint injection can be performed under fluoroscopic or CT guidance, although only CT guidance provides direct visualization of the cyst confirming accurate needle placement. This case report illustrates the use of percutaneous CT-guided facet joint cyst treatment as a temporizing measure or alternative to surgical treatment in the proper clinical scenario. PMID:19597890

Chang, Anthony

2009-09-01

14

The value of SPECT scans in identifying back pain likely to benefit from facet joint injection  

Microsoft Academic Search

SUMMARY Lumbar facet disease is sometimes implicated in low back pain. Identification is difficult and this may account for a variable response. Single photon emission computerized tomography (SPECT) is a scanning technique which enables localization of facet joint pathology. We determined whether recognition of facet disease by this method improved the response to corticosteroi d injection treatment. Fifty-eight patients with

A. L. DOLAN; P. J. RYAN; N. K. ARDEN; R. STRATTON; J. R. WEDLEY; W. HAMANN; T. GIBSON

1996-01-01

15

Association between facet joint osteoarthritis and the Oswestry Disability Index  

PubMed Central

AIM: To investigate the correlation of facet joint osteoarthritis (FJOA) at lumbar levels L4/L5 and L5/S1 and the Oswestry Disability Index (ODI). METHODS: The study involved lumbar MRIs of 591 patients with a mean age of 47.3 years. The MRIs of the lumbar spine were performed on a 1.5 Tesla scanner (Magnetom® Avanto, Siemens AG, Erlangen, Germany) using a dedicated receive only spine coil. After initial blinding, each dataset was evaluated by 2 board certified radiologist with more than 5 years experience in musculoskeletal imaging. In total 2364 facet joints were graded. Degenerative changes of the facet joints were evaluated according to the 4-point scale as proposed by Weishaupt et al Functional status was assessed using the ODI. The index is scored from 0 to 100 and interpreted as follows: 0%-20%, minimal disability; 20%-40%, moderate disability; 40%-60%, severe disability; 60%-80%, crippled; 80%-100%, patients are bedbound. Spearman’s coefficient of rank correlation was used for statistical analysis, with significance set at P < 0.05. RESULTS: In total 2364 facet joints at lumbar levels L4/5 and L5/S1 were analysed in 591 individuals. FJOA was present in 97% (L4/L5) and 98% (L5/S1). At level L4/5 (left/right) 17/15 (2.9%/2.5%) were described as grade 0, 146/147 (24.7%/24.9%) as grade 1, 290/302 (49.1%/51.1%) as grade 2 and 138/127 (23.4%/21.5%) as grade 3. At level L5/S1 (left/right) 10/11 (1.7%/1.9%) were described as grade 0, 136/136 (23.0%/23.0%) as grade 1, 318/325 (53.8%/55.0%) as grade 2 and 127/119 (21.5%/20.1%) as grade 3. Regarding the ODI scores, patients’ disability had a minimum of 0% and a maximum of 91.11% with an arithmetic mean of 32.77% ± 17.02%. The majority of patients (48.39%) had moderate functional disability (21%-40%). There was no significant correlation between FJOA and ODI on both sides of lumbar level L4/5 and on the left side of lumbar level L5/S1. A weak positive correlation was evaluated between ODI and FJOA on the right side of lumbar level L5/S1. CONCLUSION: The missing correlation of FJOA and ODI confirms our clinical experience that imaging alone is an insufficient approach explaining low back pain. Clinical correlation is imperative for an adequate diagnostic advance in patients with low back pain.

Maataoui, Adel; Vogl, Thomas J; Middendorp, Marcus; Kafchitsas, Konstantinos; Khan, M Fawad

2014-01-01

16

Calcium pyrophosphate dihydrate crystal deposition of multiple lumbar facet joints: a case report.  

PubMed

Pseudogout of the lumbar facet joints is rare. We report on a 69-year-old woman with 2-level symptomatic synovial cysts of the facet joints caused by calcium pyrophosphate dihydrate crystal deposition. She underwent surgical decompression for sciatica and low back pain. At one-year follow-up, she had recovered completely. PMID:22933691

Namazie, Mohamed Ridzwan bin Mohamed; Fosbender, Murray R

2012-08-01

17

Magnetic resonance-guided focused ultrasound treatment of facet joint pain: summary of preclinical phase  

PubMed Central

Study design A phantom experiment, two thermocouple experiments, three in vivo pig experiments, and a simulated treatment on a healthy human volunteer were conducted to test the feasibility, safety, and efficacy of magnetic resonance-guided focused ultrasound (MRgFUS) for treating facet joint pain. Objective The goal of the current study was to develop a novel method for accurate and safe noninvasive facet joint ablation using MRgFUS. Summary of background data Facet joints are a common source of chronic back pain. Direct facet joint interventions include medial branch nerve ablation and intra-articular injections, which are widely used, but limited in the short and long term. MRgFUS is a breakthrough technology that enables accurate delivery of high-intensity focused ultrasound energy to create a localized temperature rise for tissue ablation, using MR guidance for treatment planning and real-time feedback. Methods We validated the feasibility, safety, and efficacy of MRgFUS for facet joint ablation using the ExAblate 2000® System (InSightec Ltd., Tirat Carmel, Israel) and confirmed the system's ability to ablate the edge of the facet joint and all terminal nerves innervating the joint. A phantom experiment, two thermocouple experiments, three in vivo pig experiments, and a simulated treatment on a healthy human volunteer were conducted. Results The experiments showed that targeting the facet joint with energies of 150–450 J provides controlled and accurate heating at the facet joint edge without penetration to the vertebral body, spinal canal, or root foramina. Treating with reduced diameter of the acoustic beam is recommended since a narrower beam improves access to the targeted areas. Conclusions MRgFUS can safely and effectively target and ablate the facet joint. These results are highly significant, given that this is the first study to demonstrate the potential of MRgFUS to treat facet joint pain. PMID:24921048

2014-01-01

18

Synovial Cysts of the Lumbar Facet Joints: A Retrospective Magnetic Resonance Imaging Study Investigating their Relation with Degenerative Spondylolisthesis  

Microsoft Academic Search

Patients with synovial cysts of the facet joints were compared with patients with degenerative spondylolisthesis (DS), based on the magnetic resonance imaging (MRI) findings of their spondyloses. The lumbar MRI of 30 patients with DS (group 1) 24 patients with synovial cysts of the facet joints (group 2) were studied. All patients were evaluated in terms of facet joint arthritis,

2009-01-01

19

Presence and Extent of Severe Facet Joint Osteoarthritis Are Associated with Back Pain in Older Adults  

PubMed Central

Objective To determine whether the presence and extent of severe lumbar facet joint osteoarthritis (OA) is associated with back pain in older adults, accounting for disc height narrowing and other covariates. Design 252 older adults from the Framingham Offspring Cohort (mean age 67 years) were studied. Participants received standardized CT assessments of lumbar facet joint OA and disc height narrowing at the L2-S1 interspaces using 4-grade semi-quantitative scales. Severe facet joint OA was defined according to the presence and/or degree of joint space narrowing, osteophytosis, articular process hypertrophy, articular erosions, subchondral cysts, and intraarticular vacuum phenomenon. Severe disc height narrowing was defined as marked narrowing with endplates almost in contact. Back pain was defined as participant report of pain on most days or all days in the past 12 months. We used multivariable logistic regression to examine associations between severe facet joint OA and back pain, adjusting for key covariates including disc height narrowing, sociodemographics, anthropometrics, and health factors. Results Severe facet joint OA was more common in participants with back pain than those without (63.2% vs. 46.7%;p=0.03). In multivariable analyses, presence of any severe facet joint OA remained significantly associated with back pain (odds ratio[OR]2.15 (95% confidence interval [CI]1.13-4.08). Each additional joint with severe OA conferred greater odds of back pain (OR per joint 1.20 (95% CI;1.02-1.41). Conclusions The presence and extent of severe facet joint OA on CT imaging is associated with back pain in community-based older adults, independent of sociodemographics, health factors, and disc height narrowing. PMID:23973131

Suri, Pradeep; Hunter, David J.; Rainville, James; Guermazi, Ali; Katz, Jeffrey N.

2014-01-01

20

MR imaging of lumbar facet joint synovial cysts  

Microsoft Academic Search

.   The increasing application of magnetic resonance (MR) imaging of the spine has raised the awareness of lumbar facet synovial\\u000a cysts (LFSC). This well recognised, yet uncommon condition, presents with low back pain and radiculopathy due to the presence\\u000a of an extradural mass. The commonest affected level is L4\\/5 with a mild degenerative spondylolisthesis a frequent associated\\u000a finding. MR imaging

E. Apostolaki; A. M. Davies; N. Evans; V. N. Cassar-Pullicino

2000-01-01

21

Comparison of Superior Level Facet Joint Violations During Open and Percutaneous Pedicle Screw Placement  

PubMed Central

Background Superior-level facet joint violation by pedicle screws may result in increased stress to the level above the instrumentation and may contribute to adjacent segment disease (ASD). Previous studies have evaluated facet joint violations in open or percutaneous screw cases, but there are no reports describing a direct institutional comparison. Objective To compare the incidence of superior-level facet violation for open versus percutaneous pedicle screws, and evaluate patient and surgical factors that impact this outcome. Methods We reviewed 279 consecutive patients who underwent an index instrumented lumbar fusion from 2007 to 2011 for degenerative spine disease with stenosis with or without spondylolisthesis. We used a CT grading system which represents progressively increasing grades of facet joint violation. Patient and surgical factors were evaluated to determine their impact on facet violation. Results Our cohort consisted of 126 open and 153 percutaneous cases. Percutaneous procedures had a higher overall violation grade (p=0.018) and greater incidence of high-grade violations (p=0.0059) compared to open procedures. Bivariate analysis showed significantly greater violations in percutaneous cases for age<65, obesity, pedicle screws at L4, and 1- and 2-level surgeries. Multivariate analysis showed the percutaneous approach and depth of the spine to be independent risk factors for high-grade violations. Conclusion This study demonstrates greater facet violations for percutaneously placed pedicle screws compared to open. PMID:22843132

Babu, Ranjith; Park, Jong G.; Mehta, Ankit I.; Shan, Tony; Grossi, Peter M.; Brown, Christopher R.; Richardson, William J.; Isaacs, Robert E.; Bagley, Carlos A.; Kuchibhatla, Maragatha; Gottfried, Oren N.

2012-01-01

22

Ultrasound-guided facet joint injection to treat a spinal cyst.  

PubMed

Lumbar spinal cysts often present with backache and may be accompanied by lower extremity weakness as well as radiation pain if root compression occurs. The treatment regimens include anti-inflammatory drugs, physical therapy, procedures guided by fluoroscopy or computed tomography, and surgery. We report the case of a patient with a symptomatic lumbar spinal cyst at the L4-L5 facet joint. The symptoms immediately remitted after ultrasound-guided steroid-lidocaine injection into the L4-L5 facet joint. Magnetic resonance imaging follow up 4 months after injection showed complete resolution of the cyst. PMID:24631041

Lin, Tung-Liang; Chung, Chin-Teng; Lan, Howard Haw-Chang; Sheen, Huey-Min

2014-04-01

23

Synovial cysts of the lumbar facet joints: a retrospective magnetic resonance imaging study investigating their relation with degenerative spondylolisthesis.  

PubMed

Patients with synovial cysts of the facet joints were compared with patients with degenerative spondylolisthesis (DS), based on the magnetic resonance imaging (MRI) findings of their spondyloses. The lumbar MRI of 30 patients with DS (group 1) 24 patients with synovial cysts of the facet joints (group 2) were studied. All patients were evaluated in terms of facet joint arthritis, disc degeneration, facet joint effusion, and the thickness of the flaval ligament. 54.1% of the patients with synovial cysts had associated DS. The mean grade of disc degeneration (2.43+/-0.50 and 2.13+/-0.68 in groups 1 and 2, respectively) and the mean thickness of the flaval ligament (3.20+/-1.22 mm and 3.83+/-1.46 mm in groups 1 and 2, respectively) did not differ between the groups (p=0.093 and p=0.097). The mean grade of facet joint osteoarthritis (2.53+/-0.51 and 2.08+/-0.72 in groups 1 and 2, respectively) was significantly higher in group 1 (p=0.18). The co-existance of synovial effusion was significantly higher in cases with synovial cysts. (p=0.008). Synovial cysts are associated with DS and facet joint osteoarthritis. The presence of synovial effusion and the high degree of disc degeneration are prominent features in patients with synovial cysts. Although osteoarthritis and DS are highly concomitant with facet joint synovial cysts, both conditions do not invariably lead to a cyst formation. PMID:20059882

Alicioglu, B; Sut, N

2009-01-01

24

Pedicle marrow signal intensity changes in the lumbar spine: a manifestation of facet degenerative joint disease  

Microsoft Academic Search

Objective. Signal intensity changes in lumbar pedicles, similar to those described in vertebral body endplates adjacent to degenerated\\u000a discs, have been described as an ancillary sign of spondylolysis on MRI. The purpose of this study was to determine whether\\u000a pedicle marrow signal intensity changes also occur in association with facet degenerative joint disease.\\u000a \\u000a \\u000a Design. Eighty-nine lumbar spine MRI examinations without

Jennifer L. Morrison; Phoebe A. Kaplan; Robert G. Dussault; Mark W. Anderson

2000-01-01

25

[Arthrosis treatment. Nursing intervention].  

PubMed

This article presents the case of a patient suffering from arthrosis residing in an elderly home and who is being treated mainly with pharmaceuticals. Due to that patient's incapacity an integral nursing intervention plan was proposed; for this plan, an evaluation was carried out by the agency, the deficit, the self-care needs and requirements, and a treatment plan integrated basically of educational action plans was developed. The theoretical reference which provides the framework for this entire process is Orem's Theory of Self-Care. By means of this intervention, medical professionals hope to improve the life quality for this kind of patient and to highlight the importance that educational action plans have in the treatment of patients. PMID:19209673

Calderari Fernández, Elena; de la Serna, Marta Sánchez-Alarcos; Jara Casas, Teresa Omayra; Méndez Comerón, Beatriz; Collados Gómez, Laura; de la Torre Díez, Beatriz; Manzanares Matamoros, Laura

2008-12-01

26

The orientation of the articular facets of the zygapophyseal joints at the cervical and upper thoracic region.  

PubMed

Knowledge of the orientation of facet joints in the cervical and upper thoracic region is important for understanding the biomechanical properties and clinical conditions relevant to the neck. The study was undertaken on dry macerated bones from 30 adult male human vertebral columns. The orientation of the superior articular facets in relation to their inclination with the sagittal and transverse planes was examined between C3 and T3 vertebrae in each column. The linear dimensions of the superior articular facets and the width/height ratio were also calculated. The results show that all vertebrae at C3 level and 73% at C4 level displayed posteromedially facing superior articular facets. Similarly at T1 level (C7/T1 joint) and below, all columns showed posterolaterally facing superior articular facets. The level of change in orientation, from posteromedial to posterolateral facing superior facets, was not constant and occurred anywhere between C4 (C3/C4 joint) and T1 (C7/T1 joint). The change in orientation followed 2 different patterns, i.e. sudden or gradual. The C6 vertebra (C5/C6 joint) was the most frequent site to show the transition. The shape of the superior articular facets was circular to oval at C3, C4 and C5 levels and gradually changed to a transversely elongated surface at C7 and T1. These findings correlate well with various cervical movements and associated clinical conditions. PMID:11327205

Pal, G P; Routal, R V; Saggu, S K

2001-04-01

27

Technical factors related to the incidence of adjacent superior segment facet joint violation after transpedicular instrumentation in the lumbar spine  

Microsoft Academic Search

Segmental pedicle screw fixation is rapidly becoming a popular method of spinal instrumentation. Few studies have investigated\\u000a the rates of adjacent superior segment facet joint violation. The purpose of our study were to investigate the incidence of\\u000a superior segment facet joint violation after pedicle screw instrumentation in the lumbar spine and to evaluate technical factors\\u000a related to the incidence. A

Zhiming Chen; Jie Zhao; Hao Xu; Aigang Liu; Jiandong Yuan; Cong Wang

2008-01-01

28

Technical factors related to the incidence of adjacent superior segment facet joint violation after transpedicular instrumentation in the lumbar spine  

PubMed Central

Segmental pedicle screw fixation is rapidly becoming a popular method of spinal instrumentation. Few studies have investigated the rates of adjacent superior segment facet joint violation. The purpose of our study were to investigate the incidence of superior segment facet joint violation after pedicle screw instrumentation in the lumbar spine and to evaluate technical factors related to the incidence. A prospective study including 96 patients who underwent lumbar and lumbosacral fusion was conducted between March 2006 and December 2007. All patients had bilateral or unilateral posterior pedicle screw-rod instrumentation with either CD-Horizon (top-loading screw) or TSRH (side-connecting screw) implants. Pedicle screws were instrumented according to the methods advocated by Roy-Camille (Group 1, 20 cases) or Weinstein (Group 2, 76 cases). All patients had computed tomography scan at 1 week post operation. CT scans were reviewed blind by an experienced spine research fellow and a consultant radiologist to determine violation of the adjacent superior segment facet joint. Superior segment facet joint violation occurred in all of the 20 patients (100%) and all of the top-level screws (100%) in Group 1. The spinal research fellow noted the incidence of facet joint violation to be present in 23.8% of the screws and 32.9% of the patients in Group 2, whereas the consultant radiologist noted this to be the case in 25.2 and 35.5%, respectively. The incidence of facet joint violation in patients with CD-Horizon screws was far lower than patients with TSRH screws (P < 0.001). In conclusion, it seems that meticulous surgical dissection without injuring the top-level facet joints, proper instrumentation of pedicle screws with the appropriate entry site (Weinstein’s method), trajectory, and use of top-loading screw heads are some ways that surgeons could minimize the risk of top-level facet joint violation. PMID:18795343

Chen, Zhiming; Xu, Hao; Liu, Aigang; Yuan, Jiandong; Wang, Cong

2008-01-01

29

CT-Guided Transfacet Pedicle Screw Fixation in Facet Joint Syndrome: A Novel Approach.  

PubMed

Axial microinstability secondary to disc degeneration and consequent chronic facet joint syndrome (CFJS) is a well-known pathological entity, usually responsible for low back pain (LBP). Although posterior lumbar fixation (PIF) has been widely used for lumbar spine instability and LBP, complications related to wrong screw introduction, perineural scars and extensive muscle dissection leading to muscle dysfunction have been described. Radiofrequency ablation (RFA) of facet joints zygapophyseal nerves conventionally used for pain treatment fails in approximately 21% of patients. We investigated a "covert-surgery" minimal invasive technique to treat local spinal instability and LBP, using a novel fully CT-guided approach in patients with axial instability complicated by CFJS resistant to radioablation, by introducing direct fully or partially threaded transfacet screws (transfacet fixation - TFF), to acquire solid arthrodesis, reducing instability and LBP. The CT-guided procedure was well tolerated by all patients in simple analogue sedation, and mean operative time was approximately 45 minutes. All eight patients treated underwent clinical and CT study follow-up at two months, revealing LBP disappearance in six patients, and a significant reduction of lumbar pain in two. In conclusion, CT-guided TFF is a fast and safe technique when facet posterior fixation is needed. PMID:25363265

Manfré, Luigi

2014-10-31

30

Arthrosis of the knee in chronic anterior laxity.  

PubMed

Arthrosis following rupture of the anterior cruciate ligament has been analysed in two series. The first series was derived from a review of 150 cases of reconstruction of the anterior cruciate ligament with a follow-up of 3 years or more. Arthrosis was seen to have developed in 13.3%. The second series was concerned with 64 cases of unilateral arthrosis treated by upper tibial valgus osteotomy in whom there had been a previous rupture of the anterior cruciate ligament. The 'tolerance interval'--that is the time between the original ligamentous injury and the time of osteotomy--for the development of arthrosis was very variable, ranging in the natural-history cases from 10 to 50 years, with a mean of 35 years. It is important to recognise the radiological signs of the onset of arthrosis. These are osteophytosis of the intercondylar notch, osteophyte formation at the posterior part of the medial tibial plateau, and, in particular, narrowing of the medial joint line with posterior subluxation of the medial femoral condyle, well seen in lateral radiographs whilst standing on one lower limb. Early arthroses, appearing after 10 years, may occur as a 'natural arthrosis', but it develops much more frequently after surgical treatment that had failed to correct anterior laxity and particularly when it had been performed on knees that were already pre-arthrotic. The main factor in arthrosis is anterior laxity measured radiologically by an 'active Lachman' radiograph. Removal of the medial meniscus which in itself, is liable to produce arthrosis, is even more harmful in anterior cruciate laxity since it doubles the degree of anterior subluxation of the tibia seen on unilateral weight-bearing. The development of varus deformity, which characterises progressive arthrosis, has its origin in wear of the posterior part of the medial tibial plateau caused by anterior cruciate laxity. Other factors play an important part such as associated lateral laxity, constitutional genu varum and weakness of the hamstring muscles, which oppose the subluxating action of the quadriceps. PMID:24461232

Dejour, H; Walch, G; Deschamps, G; Chambat, P

2014-02-01

31

Which portion in a facet is specifically affected by articular cartilage degeneration with aging in the human lumbar zygapophysial joint?  

PubMed

Using 10 osteoligamentous vertebral columns obtained from elderly donated cadavers, we describe in detail degenerative changes of the articular cartilage in lumbar zygapophysial joints to show which portion in a facet is specifically affected. Degenerative changes, including extended cartilage defects, occurred in multiple facets of every specimen. The results demonstrated 5 basic morphologies of degeneration, i.e., 1) marginal dominace in the articular surface, 2) lower segment dominance except for the lowest (L5/S) facet, 3) advancement in the inferior articular process, 4) cranial and caudal dominance rather than the dorsal dominance in the articular surface and 5) progress in a mirror-image manner. These rules seemed to be consistent with differences in size, shape and kinesiological aspects of the facet between segments and between portions in a facet. PMID:12858963

Tanno, Iwao; Oguma, Hiroshi; Murakami, Gen; Sato, Shu-ichi; Yamashita, Toshihiko

2003-05-01

32

Lumbar Facet Joint Synovial Cysts: Does T2 Signal Intensity Predict Outcomes after Percutaneous Rupture?  

PubMed Central

BACKGROUND AND PURPOSE Lumbar facet synovial cysts are a cause of back pain and radiculopathy with facet joint degeneration, the most common cause for cyst formation. Typically, LFSCs are T2 hyperintense on MR imaging, but the signal intensity is variable. Treatment options include percutaneous rupture and surgical resection. This study evaluates the relationship between LFSC signal intensity on MR imaging and outcomes as it relates to percutaneous rupture success and need for subsequent surgery. MATERIALS AND METHODS A retrospective review of 110 patients who underwent CT fluoroscopic-guided rupture of symptomatic LFSCs was performed. The LFSCs were characterized by their T2 signal intensity on MR imaging and divided into 3 groups: high, intermediate, and low T2 signal intensity. The rates of successful cyst rupture and need for subsequent surgery were recorded. RESULTS Percutaneous LFSC rupture was technically successful in 87% of all cases. Cyst rupture was successful in 89% and 90% of high and intermediate signal intensity cysts, respectively, and in 65% of low signal intensity cysts (P = .017, .030). High signal intensity cysts had lower postprocedural surgical rates (29%) when compared with intermediate and low signal cyst as a group (P = .045). CONCLUSIONS T2 hyperintense and intermediate signal intensity LFSCs are easier to rupture, perhaps because the cysts contain a higher proportion of fluid and are less gelatinous or calcified than T2 hypointense cysts. Patients with T2 hyperintense LFSCs are less likely to need surgery. PMID:23449657

Cambron, S.C.; McIntyre, J.J.; Guerin, S.J.; Li, Z.; Pastel, D.A.

2013-01-01

33

The short- and mid-term effect of dynamic interspinous distraction in the treatment of recurrent lumbar facet joint pain  

PubMed Central

Owing to failure to achieve positive long-term effects, the currently performed treatment methods for lumbar facet joint syndrome (LFJS) are still under debate. Interspinous distraction devices unload the facet joints. Thus, these devices might be an alternative surgical treatment method for LFJS. The aim of this study was to evaluate the clinical and radiological outcome of an interspinous distraction device for the treatment of LFJS. Subjects had verified single level LFJS at level L4–5. They received percutaneous facet joint denervation (PFJD). If pain persisted, they were offered implantation of an interspinous device (Coflex) and/or repeat PFJD. Clinical and radiological outcome was determined before and after PFJD or surgery up to 2 years afterwards in all cases. Forty-one patients with LFJS at L4–5 underwent PFJD. Twenty patients with persisting pain underwent a subsequent surgery for implantation of an interspinous device. Five patients with recurrent pain at 6–12 months opted for an additional PFJD. Three obese patients (body weight >100 kg) had persistent pain at 3 months after surgery and received additionally dorsal semi-dynamic stabilization. The clinical outcome improved significantly in the surgically treated patients; however, it did not differ compared with patients receiving PFJD only after 24 months. Radiological evaluation revealed a restricted range of motion (ROM) of the operated and an elevated ROM of the adjacent segment. Surgical or device-related complications were not observed. In conclusions, the implantation of an interspinous Coflex device in case of recurrent facet joint pain succeeds to improve facet joint pain in clinical short-and mid-term settings. However, it does not exceed the outcome of denervated patients. PMID:19727852

Abbushi, Alexander; Woiciechowsky, Christian; Kroppenstedt, Stefan

2009-01-01

34

Biomechanical evaluation of the impact of various facet joint lesions on the primary stability of anterior plate fixation in cervical dislocation injuries: a cadaver study.  

PubMed

Object Injuries of the subaxial cervical spine including facet joints and posterior ligaments are common. Potential surgical treatments consist of anterior, posterior, or anterior-posterior fixation. Because each approach has its advantages and disadvantages, the best treatment is debated. This biomechanical cadaver study compared the effect of different facet joint injuries on primary stability following anterior plate fixation. Methods Fractures and plate fixation were performed on 15 fresh-frozen intact cervical spines (C3-T1). To simulate a translation-rotation injury in all groups, complete ligament rupture and facet dislocation were simulated by dissecting the entire posterior and anterior ligament complex between C-4 and C-5. In the first group, the facet joints were left intact. In the second group, one facet joint between C-4 and C-5 was removed and the other side was left intact. In the third group, both facet joints between C-4 and C-5 were removed. The authors next performed single-level anterior discectomy and interbody grafting using bone material from the respective thoracic vertebral bodies. An anterior cervical locking plate was used for fixation. Continuous loading was performed using a servohydraulic test bench at 2 N/sec. The mean load failure was measured when the implant failed. Results In the group in which both facet joints were intact, the mean load failure was 174.6 ± 46.93 N. The mean load failure in the second group where only one facet joint was removed was 127.8 ± 22.83 N. In the group in which both facet joints were removed, the mean load failure was 73.42 ± 32.51 N. There was a significant difference between the first group (both facet joints intact) and the third group (both facet joints removed) (p < 0.05, Kruskal-Wallis test). Conclusions In this cadaver study, primary stability of anterior plate fixation for dislocation injuries of the subaxial cervical spine was dependent on the presence of the facet joints. If the bone in one or both facet joints is damaged in the clinical setting, anterior plate fixation in combination with bone grafting might not provide sufficient stabilization; additional posterior stabilization may be needed. PMID:25014498

Oberkircher, Ludwig; Born, Sebastian; Struewer, Johannes; Bliemel, Christopher; Buecking, Benjamin; Wack, Christina; Bergmann, Martin; Ruchholtz, Steffen; Krüger, Antonio

2014-10-01

35

Systematic review of tests to identify the disc, SIJ or facet joint as the source of low back pain  

PubMed Central

Clinical practice guidelines state that the tissue source of low back pain cannot be specified in the majority of patients. However, there has been no systematic review of the accuracy of diagnostic tests used to identify the source of low back pain. The aim of this systematic review was therefore to determine the diagnostic accuracy of tests available to clinicians to identify the disc, facet joint or sacroiliac joint (SIJ) as the source of low back pain. MEDLINE, EMBASE and CINAHL were searched up to February 2006 with citation tracking of eligible studies. Eligible studies compared index tests with an appropriate reference test (discography, facet joint or SIJ blocks or medial branch blocks) in patients with low back pain. Positive likelihood ratios (+LR) > 2 or negative likelihood ratios (-LR) < 0.5 were considered informative. Forty-one studies of moderate quality were included; 28 investigated the disc, 8 the facet joint and 7 the SIJ. Various features observed on MRI (high intensity zone, endplate changes and disc degeneration) produced informative +LR (> 2) in the majority of studies increasing the probability of the disc being the low back pain source. However, heterogeneity of the data prevented pooling. +LR ranged from 1.5 to 5.9, 1.6 to 4.0, and 0.6 to 5.9 for high intensity zone, disc degeneration and endplate changes, respectively. Centralisation was the only clinical feature found to increase the likelihood of the disc as the source of pain: +LR = 2.8 (95%CI 1.4–5.3). Absence of degeneration on MRI was the only test found to reduce the likelihood of the disc as the source of pain: ?LR = 0.21 (95%CI 0.12–0.35). While single manual tests of the SIJ were uninformative, their use in combination was informative with +LR of 3.2 (95%CI 2.3–4.4) and ?LR of 0.29 (95%CI 0.12–0.35). None of the tests for facet joint pain were found to be informative. The results of this review demonstrate that tests do exist that change the probability of the disc or SIJ (but not the facet joint) as the source of low back pain. However, the changes in probability are usually small and at best moderate. The usefulness of these tests in clinical practice, particularly for guiding treatment selection, remains unclear. Electronic supplementary material The online version of this article (doi:10.1007/s00586-007-0391-1) contains supplementary material, which is available to authorized users. PMID:17566796

Maher, C. G.; Latimer, J.; Spindler, M. F.; McAuley, J. H.; Laslett, M.; Bogduk, N.

2007-01-01

36

Evaluation of Lumbar Facet Joint Nerve Blocks in Managing Chronic Low Back Pain: A Randomized, Double-Blind, Controlled Trial with a 2-Year Follow-Up  

PubMed Central

Study Design: A randomized, double-blind, controlled trial. Objective: To determine the clinical effectiveness of therapeutic lumbar facet joint nerve blocks with or without steroids in managing chronic low back pain of facet joint origin. Summary of Background Data: Lumbar facet joints have been shown as the source of chronic pain in 21% to 41% of low back patients with an average prevalence of 31% utilizing controlled comparative local anesthetic blocks. Intraarticular injections, medial branch blocks, and radiofrequency neurotomy of lumbar facet joint nerves have been described in the alleviation of chronic low back pain of facet joint origin. Methods: The study included 120 patients with 60 patients in each group with local anesthetic alone or local anesthetic and steroids. The inclusion criteria was based upon a positive response to diagnostic controlled, comparative local anesthetic lumbar facet joint blocks. Outcome measures included the numeric rating scale (NRS), Oswestry Disability Index (ODI), opioid intake, and work status, at baseline, 3, 6, 12, 18, and 24 months. Results: Significant improvement with significant pain relief of ? 50% and functional improvement of ? 40% were observed in 85% in Group 1, and 90% in Group II, at 2-year follow-up. The patients in the study experienced significant pain relief for 82 to 84 weeks of 104 weeks, requiring approximately 5 to 6 treatments with an average relief of 19 weeks per episode of treatment. Conclusions: Therapeutic lumbar facet joint nerve blocks, with or without steroids, may provide a management option for chronic function-limiting low back pain of facet joint origin. PMID:20567613

Manchikanti, Laxmaiah; Singh, Vijay; Falco, Frank J.E.; Cash, Kimberly A.; Pampati, Vidyasagar

2010-01-01

37

Influences of denucleation on contact force of facet joints under whole body vibration.  

PubMed

To investigate the influence of the injured disc, frequency, load and damping on the facet contact forces of the low lumbar spine on the condition of whole body vibration, a detailed 3-D nonlinear finite element model was created based on the actual geometrical data of embalmed vertebrae of lumbar spine. The denucleation and facetectomy, together with removal of the capsular ligaments was employed to mimic the injury conditions of lumbar spine after surgery. The compression cyclic force was assumed to mimic the dynamic loads of transport vehicles. The results show that the high frequency vibration might increase both of the value and the vibration amplitude of facet contact forces of the lumbar spine under whole body vibration. The nucleus removal may increase significantly the facet contact forces. Although damping can decrease the vibration amplitude of facet contact forces for intact models, it has less effect on the vibration amplitude of facet contact force for the denucleated models. The denucleation of intervertebral discs is more harmful to the facet articulation on the condition of whole body vibration. PMID:17510817

Guo, L-X; Zhang, M; Teo, E-C

2007-07-01

38

Percutaneous Resolution of Lumbar Facet Joint Cysts as an Alternative Treatment to Surgery: A Meta-Analysis  

PubMed Central

Purpose A comprehensive review of the literature in order to analyze data about the success rate of percutaneous resolution of the lumbar facet joint cysts as a conservative management strategy. Methods A systematic search for relevant articles published during 1980 to May 2014 was performed in several electronic databases by using the specific MeSH terms and keywords. Most relevant data was captured and pooled for the meta-analysis to achieve overall effect size of treatment along with 95% confidence intervals. Results 29 studies were included in the meta-analysis. Follow-up duration as mean ± sd (range) was 16±10.2 (5 days to 5.7 years). Overall the satisfactory results (after short- or long-term follow-up) were achieved in 55.8 [49.5, 62.08] % (pooled mean and 95% CI) of the 544 patients subjected to percutaneous lumbar facet joint cyst resolution procedures. 38.67 [33.3, 43.95] % of this population underwent surgery subsequently to achieve durable relief. There existed no linear relationship between the increasing average duration of follow-up period of individual studies and percent satisfaction from the percutaneous resolutions procedure. Conclusion Results shows that the percutaneous cyst resolution procedures have potential to be an alternative to surgical interventions but identification of suitable subjects requires further research. PMID:25389771

Shuang, Feng; Hou, Shu-Xun; Zhu, Jia-Liang; Ren, Dong-Feng; Cao, Zheng; Tang, Jia-Guang

2014-01-01

39

Fluoroscopic caudal epidural injections in managing chronic axial low back pain without disc herniation, radiculitis, or facet joint pain  

PubMed Central

Background Chronic low back pain without disc herniation is common. Various modalities of treatments are utilized in managing this condition, including epidural injections. However, there is continued debate on the effectiveness, indications, and medical necessity of any treatment modality utilized for managing axial or discogenic pain, including epidural injections. Methods A randomized, double-blind, actively controlled trial was conducted. The objective was to evaluate the ability to assess the effectiveness of caudal epidural injections of local anesthetic with or without steroids for managing chronic low back pain not caused by disc herniation, radiculitis, facet joints, or sacroiliac joints. A total of 120 patients were randomized to two groups; one group did not receive steroids (group 1) and the other group did (group 2). There were 60 patients in each group. The primary outcome measure was at least 50% improvement in Numeric Rating Scale and Oswestry Disability Index. Secondary outcome measures were employment status and opioid intake. These measures were assessed at 3, 6, 12, 18, and 24 months after treatment. Results Significant pain relief and functional status improvement (primary outcome) defined as a 50% or more reduction in scores from baseline, were observed in 54% of patients in group 1 and 60% of patients in group 2 at 24 months. In contrast, 84% of patients in group 1 and 73% in group 2 saw significant pain relief and functional status improvement in the successful groups at 24 months. Conclusion Caudal epidural injections of local anesthetic with or without steroids are effective in patients with chronic axial low back pain of discogenic origin without facet joint pain, disc herniation, and/or radiculitis. PMID:23091395

Manchikanti, Laxmaiah; Cash, Kimberly A; McManus, Carla D; Pampati, Vidyasagar

2012-01-01

40

Increased pelvic incidence may lead to arthritis and sagittal orientation of the facet joints at the lower lumbar spine  

PubMed Central

Background Correct sagittal alignment with a balanced pelvis and spine is crucial in the management of spinal disorders. The pelvic incidence (PI) describes the sagittal pelvic alignment and is position-independent. It has barely been investigated on CT scans. Furthermore, no studies have focused on the association between PI and facet joint (FJ) arthritis and orientation. Therefore, our goal was to clarify the remaining issues about PI in regard to (1) physiologic values, (2) age, (3) gender, (4) lumbar lordosis (LL) and (5) FJ arthritis and orientation using CT scans. Methods We retrospectively analyzed CT scans of 620 individuals, with a mean age of 43 years, who presented to our traumatology department and underwent a whole body CT scan, between 2008 and 2010. The PI was determined on sagittal CT planes of the pelvis by measuring the angle between the hip axis to an orthogonal line originating at the center of the superior end plate axis of the first sacral vertebra. We also evaluated LL, FJ arthritis and orientation of the lumbar spine. Results 596 individuals yielded results for (1) PI with a mean of 50.8°. There was no significant difference for PI and (2) age, nor (3) gender. PI was significantly and linearly correlated with (4) LL (p?=?< 0.0001). Interestingly, PI and (5) FJ arthritis displayed a significant and linear correlation (p?=?0.0062) with a cut-off point at 50°. An increased PI was also significantly associated with more sagitally oriented FJs at L5/S1 (p?=?0.01). Conclusion PI is not correlated with age nor gender. However, this is the first report showing that PI is significantly and linearly associated with LL, FJ arthritis and more sagittal FJ orientation at the lower lumbar spine. This may be caused by a higher contact force on the lower lumbar FJs by an increased PI. Once symptomatic or in the event of spinal trauma, patients with increased PI and LL could benefit from corrective surgery and spondylodesis. PMID:24188071

2013-01-01

41

Fluoroscopic cervical epidural injections in chronic axial or disc-related neck pain without disc herniation, facet joint pain, or radiculitis  

PubMed Central

Background While chronic neck pain is a common problem in the adult population, with a typical 12-month prevalence of 30%–50%, there is a lack of consensus regarding its causes and treatment. Despite limited evidence, cervical epidural injections are one of the commonly performed nonsurgical interventions in the management of chronic neck pain. Methods A randomized, double-blind, active, controlled trial was conducted to evaluate the effectiveness of cervical interlaminar epidural injections of local anesthetic with or without steroids for the management of chronic neck pain with or without upper extremity pain in patients without disc herniation, radiculitis, or facet joint pain. Results One hundred and twenty patients without disc herniation or radiculitis and negative for facet joint pain by means of controlled diagnostic medial branch blocks were randomly assigned to one of two treatment groups, ie, injection of local anesthetic only (group 1) or local anesthetic mixed with nonparticulate betamethasone (group 2). The primary outcome of significant pain relief and improvement in functional status (?50%) was demonstrated in 72% of group 1 and 68% of group 2. The overall average number of procedures per year was 3.6 in both groups with an average total relief per year of 37–39 weeks in the successful group over a period of 52 weeks. Conclusion Cervical interlaminar epidural injections of local anesthetic with or without steroids may be effective in patients with chronic function-limiting discogenic or axial pain. PMID:22826642

Manchikanti, Laxmaiah; Cash, Kimberly A; Pampati, Vidyasagar; Malla, Yogesh

2012-01-01

42

Symptomatic anterior subtalar arthrosis after ankle arthrodesis.  

PubMed

A 76-year-old man reported right lateral heel pain 11 years after ankle arthrodesis. Clinically, there was tenderness in the right sinus tarsi and over the junction point between the talonavicular and calcaneocuboid joints. Radiographs showed that the joint spaces of the posterior subtalar joint and the talonavicular joint were preserved although there were osteophytes at both joints. Arthroscopic findings showed degeneration of the anterior subtalar and talonavicular joints. The symptoms subsided after arthroscopic debridement. PMID:24825553

Lui, Tun Hing

2014-01-01

43

Unusual presentation of giant cell tumor originating from a facet joint of the thoracic spine in a child: a case report and review of the literature  

PubMed Central

Introduction Giant cell tumor of the synovium is a common benign lesion that frequently occurs at the tendon sheaths in the hand; it is usually found in adults over 30 years old. It is related to pigmented villonodular synovitis. Giant cell tumor of the synovium or pigmented villonodular synovitis has been described rarely in the axial skeleton especially in the thoracic vertebrae of a child. Case presentation A previously healthy 7-year-old Thai girl presented with back pain and progressive paraparesis and was unable to walk for 1 month. She had weakness and hyperreflexia of both lower extremities. Magnetic resonance imaging showed a well-defined homogeneously and intensely enhanced extradural mass with cord compression at T4 to T7 levels. The patient underwent laminectomy at T4 through to T7 and total tumor removal. Permanent histopathologic sections and immunostains revealed a giant cell tumor of the synovium. Postoperative neurological status recovered to grade V. Magnetic resonance imaging at the 1-year follow-up showed no recurrence and there was no clinical recurrence at the 2-year follow-up. Conclusion We report an extremely rare case of giant cell tumor in the epidural space that extended from a thoracic facet joint. The tumor was removed successfully through laminectomies. Although giant cell tumor of a facet joint of the thoracic spine is very rare, it must be considered in the differential diagnosis for masses occurring in the epidural space in a child. Total tumor removal is the best treatment. Careful monitoring of recurrence can achieve a good clinical outcome. PMID:23830026

2013-01-01

44

Comparison of human lumbar facet joint capsule strains during simulated high-velocity, low-amplitude spinal manipulation versus physiological motions  

PubMed Central

BACKGROUND CONTEXT Spinal manipulation (SM) is a n effective treatment for low back pain (LBP), and it has been theorized that SM induces a beneficial neurophysiological effect by stimulating mechanically sensitive neurons in the lumbar facet joint capsule (FJC). PURPOSE The purpose of this study was to determine whether human lumbar FJC strains during simulated SM were different from those that occur during physiological motions. STUDY DESIGN/SETTING Lumbar FJC strains were measured in human cadaveric spine specimens during physiological motions and simulated SM in a laboratory setting. METHODS Specimens were tested during displacement-controlled physiological motions of flexion, extension, lateral bending, and axial rotations. SM was simulated using combinations of manipulation site (L3, L4, and L5), impulse speed (5, 20, and 50 mm/s), and pre-torque magnitude (applied at T12 to simulate patient position; 0, 5, 10 Nm). FJC strains and vertebral motions (using six degrees of freedom) were measured during both loading protocols. RESULTS During SM, the applied loads were within the range measured during SM in vivo. Vertebral translations occurred primarily in the direction of the applied load, and were similar in magnitude regardless of manipulation site. Vertebral rotations and FJC strain magnitudes during SM were within the range that occurred during physiological motions. At a given FJC, manipulations delivered distally induced capsule strains similar in magnitude to those that occurred when the manipulation was applied proximally. CONCLUSIONS FJC strain magnitudes during SM were within the physiological range, suggesting that SM is biomechanically safe. Successful treatment of patients with LBP using SM may not require precise segmental specificity, because the strain magnitudes at a given FJC during SM do not depend upon manipulation site. PMID:15863084

Ianuzzi, Allyson; Khalsa, Partap S.

2005-01-01

45

Degenerative Joint Disease in Female Ballet Dancers  

Microsoft Academic Search

The relationship between long-term ballet dancing and eventual arthrosis of the hip, ankle, subtalar, and first metatarsophalangeal joint was examined in 19 former professional female dancers, aged 50 to 70 years. The dancers were compared with pair-matched controls. All 38 women underwent medical history taking, clinical ex amination, and roentgenography of the joints studied. The roentgenographs were independently judged by

C. Niek van Dijk; Liesbeth S. L. Lim; Alina Poortman; Ernst H. Strübbe; Rene K. Marti

1995-01-01

46

Evaluation of the first metacarpal proximal facet inclination as a prognostic predictor following arthroplasty for osteoarthritis of the thumb carpometacarpal joint.  

PubMed

We have retrospectively reviewed 17 thumbs in 16 patients with osteoarthritis of the thumb carpometacarpal joints, for which arthroplasty was performed using Kaarela's method. Postoperatively, three thumbs in two patients had poor outcomes; both patients had a sharp slope of the base of the first metacarpal. Serial radiographic measurements suggested that this sharp slope affected the adducted position of the first metacarpal, and led to the appearance of a metacarpophalangeal joint hyperextension deformity of the thumb. This radiological finding could be a prognostic predictor after surgery for osteoarthritis of the thumb carpometacarpal joint. PMID:23413854

Tonogai, Ichiro; Hamada, Yoshitaka; Hibino, Naohito

2013-01-01

47

Degenerative joint disease in female ballet dancers.  

PubMed

The relationship between long-term ballet dancing and eventual arthrosis of the hip, ankle, subtalar, and first metatarsophalangeal joint was examined in 19 former professional female dancers, aged 50 to 70 years. The dancers were compared with pair-matched controls. All 38 women underwent medical history taking, clinical examination, and roentgenography of the joints studied. The roentgenographs were independently judged by two investigators and grouped according to a modified classification of Hermodsson. We found a statistically significant increase in roentgenologic arthrosis of the ankle, subtalar, and first metatarsophalangeal joints in the ballet group compared with the control group. There was no significant difference regarding degenerative changes of the hip joint. However, subjects in the dance group who had evidence of degenerative changes on roentgenographs had no clinical complaints. There was a statistically significant increase in hallux valgus deformity in the ballet group (P < 0.05). The dancers also showed a statistically significant increase in flexion, external rotation, and abduction of the hip joint, dorsal flexion of the first metatarsophalangeal joint, and inversion and eversion of subtalar joint. But the control group had statistically significant increased plantar flexion of the first metatarsophalangeal joint. The most important cause of the statistically significant increase of arthrosis of the ankle and first metatarsophalangeal joints must be explained by repetitive microtrauma. PMID:7661255

van Dijk, C N; Lim, L S; Poortman, A; Strübbe, E H; Marti, R K

1995-01-01

48

Problem of Time and Background Independence: the Individual Facets  

E-print Network

I lay out the problem of time facets as arising piecemeal from a number of aspects of background independence. Almost all of these already have simpler classical counterparts. This approach can be viewed as a facet by facet completion of the observation that Barbour-type relationalism is a background independent precursor to 2 of the 9 facets. That completion proceeds in an order dictated by the additional layers of mathematical structure required to support each. Moreover, the `nonlinear nature' of the interactions between the Problem of Time facets renders a joint study of them mandatory. The current article is none the less a useful prequel via gaining a conceptual understanding of each facet, prior to embarking on rendering some combinations of facets consistent and what further obstructions arise in attempting such joint considerations. See [20, 21, 26] for up to date studies of this more complicated joint version. I also identify new facets (threading based), subfacets (of observables and of reconstructions) and further source of variety from how far down the levels of mathematical structure these facets extend.

Edward Anderson

2014-09-14

49

Controlled medial branch anesthetic block in the diagnosis of chronic lumbar facet joint pain: the value of a three-month follow-up  

PubMed Central

OBJECTIVES: To verify the incidence of facetary and low back pain after a controlled medial branch anesthetic block in a three-month follow-up and to verify the correlation between the positive results and the demographic variables. METHODS: Patients with chronic lumbar pain underwent a sham blockade (with a saline injection) and then a controlled medial branch block. Their symptoms were evaluated before and after the sham injection and after the real controlled medial branch block; the symptoms were reevaluated after one day and one week, as well as after one, two and three months using the visual analog scale. We searched for an association between the positive results and the demographic characteristics of the patients. RESULTS: A total of 104 controlled medial branch blocks were performed and 54 patients (52%) demonstrated >50% improvements in pain after the blockade. After three months, lumbar pain returned in only 18 individuals, with visual analogue scale scores >4. Therefore, these patients were diagnosed with chronic facet low back pain. The three-months of follow-up after the controlled medial branch block excluded 36 patients (67%) with false positive results. The results of the controlled medial branch block were not correlated to sex, age, pain duration or work disability but were correlated with patient age (p<0.05). CONCLUSION: Patient diagnosis with a controlled medial branch block proved to be effective but was not associated with any demographic variables. A three-month follow-up is required to avoid a high number of false positives. PMID:25141111

da Rocha, Ivan Dias; Cristante, Alexandre Fogaca; Marcon, Raphael Martus; Oliveira, Reginaldo Perilo; Letaif, Olavo Biraghi; de Barros Filho, Tarcisio Eloy Pessoa

2014-01-01

50

Factors to Facets  

Microsoft Academic Search

Extending our previous research on personality and prej- udice, we tested the predictive power of Big Five facet compared with factor scores in three studies. Study 1 (N 5 170) examined the predictive power of factors and facets when explaining generalized prejudice, a composite of four prejudice types. Study 2 (N 5 158) focused on sexism and Study 3 (N

Bo Ekehammar; Nazar Akrami

51

Arthroscopic synovectomy, irrigation, and debridement for treatment of septic ankle arthrosis: a systematic review and case series.  

PubMed

Septic arthrosis of the ankle is a rare, often devastating, infection, with a high potential for morbidity and mortality. Delay in treatment can lead to cartilage erosion, painful synovitis, and osteomyelitis. Septic ankle arthrosis deserves prompt recognition and intervention. However, quality, sound, protocol-directed arthroscopic treatment of septic ankle arthrosis of the ankle has not yet been reported. We performed a systematic review of the electronic databases and other relevant peer-reviewed sources to determine the outcomes and treatment protocols associated with septic ankle arthrosis treated with arthroscopic synovectomy, irrigation, and debridement. Nine studies, involving a total of 15 ankles, met our inclusion criteria. In addition, we present the short-term outcomes of a protocol-driven arthroscopic synovial biopsy, deep culture procurement, synovectomy, irrigation, and debridement approach for 8 ankles (8 patients). To our knowledge, this would be the largest individual case series specific to arthroscopic treatment of septic ankle arthrosis. The most common infectious organism reported in the systematic review and in our case series was methicillin-sensitive Staphylococcus aureus. Arthroscopic synovectomy, irrigation, and debridement represents an acceptable treatment method for septic ankle arthrosis and demonstrated outcomes similar to the more traditional open approach, with fewer complications. Additional, appropriately weighted, randomized controlled studies with long-term follow-up are warranted. PMID:24345707

Mankovecky, Michael R; Roukis, Thomas S

2014-01-01

52

SLAC All Access: FACET  

SciTech Connect

SLAC's Facility for Advanced Accelerator Experimental Tests, or FACET, is a test-bed where researchers are developing the technologies required for particle accelerators of the future. Scientists from all over the world come to explore ways of improving the power and efficiency of the particle accelerators used in basic research, medicine, industry and other areas important to society. In this video, Mark Hogan, head of SLAC's Advanced Accelerator Research Department, offers a glimpse into FACET, which uses part of SLAC's historic two-mile-long linear accelerator.

Hogan, Mark

2012-07-05

53

Beam Diagnostics for FACET  

SciTech Connect

FACET, the Facility for Advanced Accelerator and Experimental Tests, is a new facility being constructed in sector 20 of the SLAC linac primarily to study beam driven plasma wakefield acceleration beginning in summer 2011. The nominal FACET parameters are 23GeV, 3nC electron bunches compressed to about 20 {micro}m long and focussed to about 10 {micro}m wide. Characterization of the beam-plasma interaction requires complete knowledge of the incoming beam parameters on a pulse-to-pulse basis. FACET diagnostics include Beam Position Monitors, Toroidal current monitors, X-ray and Cerenkov based energy spectrometers, optical transition radiation (OTR) profile monitors and coherent transition radiation (CTR) bunch length measurement systems. The compliment of beam diagnostics and their expected performance are reviewed. Beam diagnostic measurements not only provide valuable insights to the running and tuning of the accelerator but also are crucial for the PWFA experiments in particular. Beam diagnostic devices are being set up at FACET and will be ready for beam commissioning in summer 2011.

Li, S.Z.; Hogan, M.J.; /SLAC

2011-08-19

54

FACET Emittance Growth  

SciTech Connect

FACET, the Facility for Advanced Accelerator and Experimental Tests, is a new facility being constructed in sector 20 of the SLAC linac primarily to study beam driven plasma wakefield acceleration. The FACET beamline consists of a chicane and final focus system to compress the 23 GeV, 3.2 nC electron bunches to {approx}20 {micro}m long and {approx}10 {micro}m wide. Simulations of the FACET beamline indicate the short-duration and large, 1.5% rms energy spread beams may suffer a factor of four emittance growth from a combination of chromaticity, incoherent synchrotron radiation (ISR), and coherent synchrotron radiation (CSR). Emittance growth is directly correlated to head erosion in plasma wakefield acceleration and is a limiting factor in single stage performance. Studies of the geometric, CSR, and ISR components are presented. Numerical calculation of the rms emittance can be overwhelmed by long tails in the simulated phase space distributions; more useful definitions of emittance are given. A complete simulation of the beamline is presented as well, which agrees with design specifications.

Frederico, J; Hogan, M.J.; Nosochkov, Y.; Litos, M.D.; Raubenheimer, T.; /SLAC

2011-04-05

55

Clinical efficacy of radiation synovectomy in digital joint osteoarthritis  

Microsoft Academic Search

Purpose: Purpose. Radiation synovectomy was developed for local treatment of rheumatoid arthri- tis. In this study, the long-term efficacy of radiation sy- novectomy was retrospectively evaluated in patients with osteoarthritis (activated arthrosis) of the digital joints us- ing an algofunctional score. Methods: Fifty-three digital joints in 29 patients (mean age 64.8 years) were treated by intra-articular injection of 169 Er

Willm Uwe Kampen; Leif Hellweg; Schirin Massoudi-Nickel; Norbert Czech; Winfried Brenner; Eberhard Henze

2005-01-01

56

Facet cyst haematoma in the lumbar spine: a report of four cases.  

PubMed

We present 4 cases of facet cyst haematoma in the ligamentum flavum of the lumbar spine. All patients presented with a one-to-3-month history of back pain or numbness in the legs, and sudden neurological deterioration. One also developed cauda equina syndrome and another developed radiculopathy. In all cases, magnetic resonance imaging showed a mass with high signal intensity on both T1- and T2-weighted images. Facet arthrography and computed tomography revealed communication between the mass and the neighbouring facet joint. The haematomas were removed en bloc with the ligamentum flavum. They were surrounded by the ligament and contained degenerated and lacerated elastic fibres but no synovial lining cells. Facet cyst haematoma is so-named because of bleeding from tissue adjacent to the facet joint into a pre-existing facet cyst. PMID:19398800

Miyatake, N; Aizawa, T; Hyodo, H; Sasaki, H; Kusakabe, T; Sato, T

2009-04-01

57

The clinical aspects of the acute facet syndrome: results from a structured discussion among European chiropractors  

Microsoft Academic Search

BACKGROUND: The term 'acute facet syndrome' is widely used and accepted amongst chiropractors, but poorly described in the literature, as most of the present literature relates to chronic facet joint pain. Therefore, research into the degree of consensus on the subject amongst a large group of chiropractic practitioners was seen to be a useful contribution. METHODS: During the annual congress

Lise Hestbaek; Alice Kongsted; Tue Secher Jensen; Charlotte Leboeuf-Yde

2009-01-01

58

Radiographic comparison of a fractured clavicle exhibiting a pseudo-arthrosis.  

PubMed

Bone remodeling is a natural process that is potentially problematic for radiographic comparisons because it can occur after antemortem (AM) imaging, thus interfering with the comparability of AM and postmortem (PM) radiographs from the same individual. While the effects of age-related remodeling have been studied, limited attention has been given to trauma-related remodeling with respect to radiographic comparisons. This report adds to the latter topic by presenting a case of AM clavicle fracture that developed into a pseudo-arthrosis over a 12-month period prior to the individual's death. Even though remodeling was discernable along the fracture margins, adjacent skeletal features on the PM radiograph remained unaltered and constituted compelling evidence for the identification. This case illustrates the potential of using both normal and pathological anatomy concurrently to maximize the surety of findings from radiographic comparisons. PMID:22409353

Rhode, Matthew P; Goodhue, William W; Stephan, Carl N

2012-07-01

59

End-stage hindfoot arthrosis: outcomes of tibiocalcaneal fusion using internal and Ilizarov fixation.  

PubMed

End-stage post-traumatic pantalar arthrosis from ankle, pilon, and talus fractures has often been complicated by infection, bone loss, and a soft tissue deficit. Patients can present with neuropathy, diabetes, tobacco use, and previously failed arthrodesis. Fusion in this population has been challenging, with nonunion rates up to 30%, often leading to amputation. We reviewed the results of a standardized protocol that combined simultaneous internal fixation with the Ilizarov technique to achieve fusion in high-risk patients. With institutional review board approval, a retrospective review of the patients treated with simultaneous internal fixation and an Ilizarov frame was undertaken. The records and radiographs allowed identification of the comorbidities and the presence or absence of successful fusion. Complications were acknowledged and treated. Fifteen patients had undergone the procedure. The mean follow-up period was 27.9 (range 9 to 67) months. Thirteen patients (86.67%) had had previous fusion failure. Twelve patients (80%) had developed post-traumatic arthrosis, 5 (33.33%) of whom had open injuries. All patients had 1 comorbidity, and 10 (66.67%) had multiple, including rheumatoid arthritis, diabetes (types 1 and 2), and smoking. Four patients (26.67%) presented with deep infection and bone loss. Union was achieved in 11 (73.33%), with 12 (80%) patients experiencing profound pain relief. Seven patients (46.67%) required symptomatic hardware removal. Three patients (20%) eventually underwent below-the-knee amputation for recalcitrant nonunion. Statistically significant correlations were found between smoking and wound infection and revision and between nonunion and amputation. Our results have indicated that combined internal fixation with Ilizarov application can provide a strong surgical option for the management of end-stage, pantalar arthritis. More studies are needed to compare the cohort outcomes and gait analysis in these patients with those who have chosen below-the-knee amputation. PMID:24785200

Crawford, Brooke; Watson, J Tracy; Jackman, James; Fissel, Brian; Karges, David E

2014-01-01

60

Injection therapy of lumbar facet syndrome: a prospective study  

Microsoft Academic Search

Summary  \\u000a Background. Chronic low back pain remains a major health problem. Facet joint injection therapy is an easy to perform therapeutic option.\\u000a However, few prospective studies use a standardized protocol to investigate injection therapy. The aim of our study was to\\u000a evaluate quantity and duration of clinical improvement after this protocol, and to identify the best time for additional repetitive

T. L. Schulte; T. A. Pietilä; J. Heidenreich; M. Brock; R. Stendel

2006-01-01

61

Topical analgesics for knee arthrosis: a parallel study of ketoprofen gel and diclofenac emulgel.  

PubMed

The clinical efficacy of the two topical analgesics, ketoprofen hydroalcoholic gel (Fastum gel) and diclofenac emulgel, for osteoarthritis of the knee was studied. There were 85 patients who underwent the trial. They were randomly allocated into 2 groups, the diclofenac group, 42 patients (4 males and 38 females) receiving the diclofenac emulgel at the painfull site four times a day for 4 weeks, and the ketoprofen group, 43 patients (9 males and 34 females) receiving the ketoprofen hydroalcoholic gel four times a day for 4 weeks at the painful knee. Golberg's knee scoring was used to evaluate the patients before the trial, at the end of the first, second and fourth weeks. The ketoprofen group had poorer a score before the trial, however, both groups had improvement in their knee functions, knee score and pain. There was no significant difference between the groups at the end of the study. There was no serious side effect in both groups. Ketoprofen hydroalcoholic gel gave persuasive results in the treatment of knee arthrosis stage I and II. PMID:9347673

Waikakul, S; Penkitti, P; Soparat, K; Boonsanong, W

1997-09-01

62

Instability of the distal radioulnar joint.  

PubMed

The distal radioulnar joint is a complex structure necessary for forearm motion and force transmission across the wrist. Anatomic and biomechanical advances have revealed broad contributions to distal radioulnar joint stability and refined our understanding of the forces acting across it. Instability often co-occurs with other modes of pathology, such as arthrosis or malunion; and appropriate diagnosis and treatment require a comprehensive understanding of all contributing factors. Distal radioulnar joint instability can be broadly categorized as primary, post-traumatic or post-surgical. Treatment strategies include percutaneous, arthroscopic, soft-tissue, osteotomy and arthroplasty techniques. The purpose of this article is to review distal radioulnar joint instability and its management. PMID:24619248

Zimmerman, R M; Jupiter, J B

2014-09-01

63

Faceting Artifact Analysis for Computer Graphics  

Microsoft Academic Search

The faceting signal, defined in this paper as the differ- ence signal between a rendering of the original geometric model and a simplified version of the geometric model, is responsible for the faceting artifacts commonly observed in the renderings of coarse geometric models. We analyze the source of the faceting artifacts and develop a perceptual metric for the visibility of

Lijun Qu; Gary W. Meyer

2007-01-01

64

Design of a lattice-based faceted classification system  

NASA Technical Reports Server (NTRS)

We describe a software reuse architecture supporting component retrieval by facet classes. The facets are organized into a lattice of facet sets and facet n-tuples. The query mechanism supports precise retrieval and flexible browsing.

Eichmann, David A.; Atkins, John

1992-01-01

65

Lumbar facet injection for the treatment of chronic piriformis myofascial pain syndrome: 52 case studies  

PubMed Central

Background and aims The aim of this study was to demonstrate the effectiveness of lumbar facet joint injection for piriformis myofascial pain syndrome. Methods Fifty-two patients with chronic myofascial pain in the piriformis muscle each received a lumbar facet injection into the ipsilateral L5–S1 facet joint region, using the multiple insertion technique. Subjective pain intensity, trunk extension range, and lumbar facet signs were measured before, immediately after, and 2 weeks after injection. Thirty-six patients received follow-up for 6 months. Results Immediately after the injection, 27 patients (51.9%) had complete pain subsidence, 19 patients (36.5%) had pain reduction to a tolerable level, and only 6 patients (11.5%) had no pain relief to a tolerable level. Mean pain intensity was reduced from 7.4±0.9 to 1.6±2.1 after injection (P<0.01). This effectiveness lasted for 2 weeks in 49 patients (94.2%), and lasted for approximately 6 months in 35 (97.2%) of 36 patients. The mean range of motion increased from 13.4±6.8 degrees to 22.1±6.0 degrees immediately after injection, and further increased 2 weeks and 6 months later. Immediately after injection, 45 patients (86.5%) had no facet sign. In addition, 90.4% and 94.4% of patients had no facet sign after 2 weeks and after 6 months, respectively. Conclusions It is important to identify the possible cause of piriformis myofascial pain syndrome. If this pain is related to lumbar facet lesions, lumbar facet joint injection can immediately suppress piriformis myofascial pain symptoms. This effectiveness may last for at least 6 months in most patients. This study further supports the importance of eliminating the underlying etiological lesion for complete and effective relief of myofascial pain syndrome. PMID:25170256

Huang, Jen-Ting; Chen, Han-Yu; Hong, Chang-Zern; Lin, Ming-Ta; Chou, Li-Wei; Chen, Hsin-Shui; Tsai, Chien-Tsung; Chang, Wen-Dien

2014-01-01

66

Faceted exploration of image search results  

Microsoft Academic Search

This paper describes MediaFaces, a system that enables faceted exploration of media collections. The system processes semi-structured information sources to extract objects and facets, e.g. the relationships between two objects. Next, we rank the facets based on a statistical analysis of image search query logs, and the tagging behaviour of users annotating photos in Flickr. For a given object of

Roelof van Zwol; Börkur Sigurbjörnsson; Ramu Adapala; Lluis Garcia Pueyo; Abhinav Katiyar; Kaushal Kurapati; Mridul Muralidharan; Sudar Muthu; Vanessa Murdock; Polly Ng; Anand Ramani; Anuj Sahai; Sriram Thiru Sathish; Hari Vasudev; Upendra Vuyyuru

2010-01-01

67

Solitary Epidural Lipoma with Ipsilateral Facet Arthritis Causing Lumbar Radiculopathy  

PubMed Central

A 55-year-old obese man (body mass index, 31.6 kg/m2) presented radiating pain and motor weakness in the left leg. Magnetic resonance imaging showed an epidural mass posterior to the L5 vertebral body, which was isosignal to subcutaneous fat and it asymmetrically compressed the left side of the cauda equina and the exiting left L5 nerve root on the axial T1 weighted images. Severe arthritis of the left facet joint and edema of the bone marrow regarding the left pedicle were also found. As far as we know, there have been no reports concerning a solitary epidural lipoma combined with ipsilateral facet arthorsis causing lumbar radiculopathy. Solitary epidural lipoma with ipsilateral facet arthritis causing lumbar radiculopathy was removed after the failure of conservative treatment. After decompression, the neurologic deficit was relieved. At a 2 year follow-up, motor weakness had completely recovered and the patient was satisfied with the result. We recommend that a solitary epidural lipoma causing neurologic deficit should be excised at the time of diagnosis. PMID:22977701

Kim, Hong Kyun; Koh, Sung Hye

2012-01-01

68

Sandwich construction solar structural facets  

SciTech Connect

Silver/glass mirrors have excellent optical properties but need a method of support in order to be used in concentrating solar thermal systems. In collaboration with the Cummins dish/Stirling development program, the authors started investigating sandwich construction as a way to integrate silver/glass mirrors into solar optical elements. In sandwich construction, membranes such as sheet metal or plastic are bonded to the front and back of a core (like a sandwich). For solar optical elements, a glass mirror is bonded to one of the membranes. This type of construction has the advantages of a high strength-to-weight ratio, and reasonable material and manufacturing cost. The inherent stiffness of sandwich construction mirror panels also facilitates large panels. This can have cost advantages for both the amount of hardware required as well as reduced installation and alignment costs. In addition, by incorporating the panels into the support structure reductions in the amount of structural support required are potentially possible. The authors have investigated sandwich construction panels that employ cores of polystyrene, polyvinyl chloride (PVC) and polyurethane foams as well as conventional aluminum and cardboard honeycombs. The authors investigations have involved fabricating 0.5 x 0.6-m (20 x 24-inch) spherical-contour panels and testing their optical properties and environmental durability. The authors have also performed preliminary cost and performance studies. Evaluations included optical testing with the SunLab 2f and VSHOT tools both before and after exposures to environmental chamber testing. The results showed that sandwich mirror panels are potentially very accurate. However, long-term degradation due to creep was evident in all of the foam core facets. The aluminum honeycomb core facets were accurate and durable. In this paper, the design principles that guided the investigations, estimates of cost, and the results of the experimental investigations are presented.

Diver, R.B.; Grossman, J.W.

1999-07-01

69

A long-term study of diclophenac sodium in the treatment of rheumatoid arthritis and osteo-arthrosis.  

PubMed

One hundred and two patients with either rheumatoid arthritis or osteo-arthrosis were treated for prolonged periods with diclophenac sodium (Voltaren; Geigy) to evaluate the efficacy and tolerability of the drug. Fifty-seven patients completed a trial of 12 months. A total of 70% showed an improvement in functional class, and 40% of the total had complete functional capacity by the end of the trial. The drug was well tolerated. The side-effects (heartburn, abdominal cramps, headache and dizziness) were mild and in most cases did not require cessation of treatment. In 9 patients the Coombs test became positive during the trial, but this did not require cessation of therapy. PMID:354028

Abrams, G J; Solomon, L; Meyers, O L

1978-03-25

70

Load-bearing role of facets in a lumbar segment under sagittal plane loadings.  

PubMed

In the present work, the load-bearing role of the facet joints in a lumbar I2-3 segment is quantitatively determined by means of a three dimensional nonlinear finite element program. The analysis accounts for both material and geometric nonlinearities and treats the facet articulation as a nonlinear moving contact problem. The disc nucleus is considered as an inviscid incompressible fluid and the annulus as a composite of collagenous fibres embedded in a matrix of ground substance. The spinal ligaments are modelled as a collection of nonlinear axial elements. The loadings consist of axial compression and sagittal plane shears and bending moments, acting alone or combined. The results show that in pure compression, the external axial force is transmitted primarily by the intervertebral disc. The facet joints carry only a small percentage of the force. However, the facet joints carry large forces in extension, whereas in small flexion they carry none. Addition of compression tends to increase these contact forces in extension while it has no effect on them in flexion. In extension, the forces on the facet joints are transmitted by both the articular surfaces and the capsular ligaments. Although in small flexion the facets carry no load, large contact forces are predicted to develop as the segment is flexed beyond 7-8 degrees. These forces are of the same magnitude as those computed under large extension rotation and are oriented nearly in the horizontal plane with negligible component in the axial direction. The horizontal components of the contact forces generated during articulation are often larger than the axial components which directly resist the applied compressive force. The axial components of the contact forces, therefore, grossly underestimate the total forces acting on the facets. The transfer of forces from one facet to the adjacent one occurs through distinct areas in flexion and in extension loadings. That is, on the superior articular surface, the contact area shifts from the upper tip in large flexion to the lower margin in extension. On the inferior articular surface, the contact area shifts from the upper and central regions in large flexion to the lower tip in extension. PMID:3611136

Shirazi-Adl, A; Drouin, G

1987-01-01

71

Method for partially coating laser diode facets  

NASA Technical Reports Server (NTRS)

Bars of integral laser diode devices cleaved from a wafer are placed with their p regions abutting and n regions abutting. A thin BeCu mask having alternate openings and strips of the same width as the end facets is used to mask the n region interfaces so that multiple bars can be partially coated over their exposed p regions with a reflective or partial reflective coating. The partial coating permits identification of the emitting facet from the fully coated back facet during a later device mounting procedure.

Dholakia, Anil R. (Inventor)

1990-01-01

72

FACET: SLAC___s New User Facility  

SciTech Connect

FACET (Facility for Advanced Accelerator Experimental Tests) is a new User Facility at SLAC National Accelerator Laboratory. The first User Run started in spring 2012 with 20 GeV, 3 nC electron beams. The facility is designed to provide short (20 {micro}m) bunches and small (20 {micro}m wide) spot sizes, producing uniquely high power beams. FACET supports studies from many fields but in particular those of Plasma Wakefield Acceleration and Dielectric Wakefield Acceleration. The creation of drive and witness bunches and shaped bunch profiles is possible with 'Notch' Collimation. FACET is also a source of THz radiation for material studies. Positrons will be available at FACET in future user runs. We present the User Facility and the available tools and opportunities for future experiments.

Clarke, C.I.; Decker, F.-J.; England, R.J.; Erickson, R.A.; Hast, C.; Hogan, M.J.; Li, S.Z.; Litos, M.D.; Nosochkov, Y.; Seeman, J.T.; Sheppard, J.; Wienands, U.; Woodley, M.; Yocky, G.; /SLAC

2012-05-16

73

Scalable Faceted Ranking in Tagging Systems  

NASA Astrophysics Data System (ADS)

Nowadays, web collaborative tagging systems which allow users to upload, comment on and recommend contents, are growing. Such systems can be represented as graphs where nodes correspond to users and tagged-links to recommendations. In this paper we analyze the problem of computing a ranking of users with respect to a facet described as a set of tags. A straightforward solution is to compute a PageRank-like algorithm on a facet-related graph, but it is not feasible for online computation. We propose an alternative: (i) a ranking for each tag is computed offline on the basis of tag-related subgraphs; (ii) a faceted order is generated online by merging rankings corresponding to all the tags in the facet. Based on the graph analysis of YouTube and Flickr, we show that step (i) is scalable. We also present efficient algorithms for step (ii), which are evaluated by comparing their results with two gold standards.

Orlicki, José I.; Alvarez-Hamelin, J. Ignacio; Fierens, Pablo I.

74

The instant axis of rotation influences facet forces at L5/S1 during flexion/extension and lateral bending.  

PubMed

Because the disc and facets work together to constrain spinal kinematics, changes in the instant axis of rotation associated with disc degeneration or disc replacement may adversely influence risk for facet overloading and arthritis. The relationships between L5/S1 segmental kinematics and facet forces are not well defined, since previous studies have separated investigations of spinal motion and facet force. The goal of this cadaveric biomechanical study was to report and correlate a measure of intervertebral kinematics (the centrode, or the path of the instant axis of rotation) and the facet forces at the L5/S1 motion segment while under a physiologic combination of compression and anterior shear loading. Twelve fresh-frozen human cadaveric L5/S1 joints (age range 50-64 years) were tested biomechanically under semi-constrained conditions by applying compression plus shear forces in several postures: neutral, and 3 degrees and 6 degrees of flexion, extension and lateral bending. The experimental boundary conditions imposed compression and shear representative of in vivo conditions during upright stance. The 3-D instantaneous axis of rotation (IAR) was calculated between two consecutive postures. The facet joint force was simultaneously measured using thin-film sensors placed between both facet surfaces. Variations of IAR location and facet force during motion were analyzed. During flexion and extension, the IAR was oriented laterally. The IAR intersection with the mid-sagittal plane moved cephalad relative to S1 endplate during flexion (P=0.010), and posterior during extension (P=0.001). The facet force did not correlate with posture (P=0.844). However, changes in the facet force between postures did correlate with IAR position: higher IAR's during flexion correlated with lower facet forces and vice versa (P=0.04). During lateral bending, the IAR was oblique relative to the main plane of motion and translated parallel to S1 endplate, toward the side of the bending. Overall, the facet force was increased on the ipsilateral side of bending (P=0.002). The IAR positions demonstrate that the L5 vertebral body primarily rotates forward during flexion (IAR close to vertebral body center) and rotates/translates backward during extension (IAR at or below the L5/S1 intervertebral disc). In lateral bending, the IAR obliquity demonstrated coupling with axial torsion due to resistance of the ipsilateral facet. PMID:16175392

Rousseau, Marc-Antoine; Bradford, David S; Hadi, Tamer M; Pedersen, Kirk L; Lotz, Jeffery C

2006-03-01

75

FACET: Future ATM Concepts Evaluation Tool  

NASA Technical Reports Server (NTRS)

FACET (Future ATM Concepts Evaluation Tool) is an Air Traffic Management research tool being developed at the NASA Ames Research Center. This paper describes the design, architecture and functionalities of FACET. The purpose of FACET is to provide E simulation environment for exploration, development and evaluation of advanced ATM concepts. Examples of these concepts include new ATM paradigms such as Distributed Air-Ground Traffic Management, airspace redesign and new Decision Support Tools (DSTs) for controllers working within the operational procedures of the existing air traffic control system. FACET is currently capable of modeling system-wide en route airspace operations over the contiguous United States. Airspace models (e.g., Center/sector boundaries, airways, locations of navigation aids and airports) are available from databases. A core capability of FACET is the modeling of aircraft trajectories. Using round-earth kinematic equations, aircraft can be flown along flight plan routes or great circle routes as they climb, cruise and descend according to their individual aircraft-type performance models. Performance parameters (e.g., climb/descent rates and speeds, cruise speeds) are obtained from data table lookups. Heading, airspeed and altitude-rate dynamics are also modeled. Additional functionalities will be added as necessary for specific applications. FACET software is written in Java and C programming languages. It is platform-independent, and can be run on a variety of computers. FACET has been designed with a modular software architecture to enable rapid integration of research prototype implementations of new ATM concepts. There are several advanced ATM concepts that are currently being implemented in FACET airborne separation assurance, dynamic density predictions, airspace redesign (re-sectorization), benefits of a controller DST for direct-routing, and the integration of commercial space transportation system operations into the U.S. National Airspace System (NAS).

Bilmoria, Karl D.; Banavar, Sridhar; Chatterji, Gano B.; Sheth, Kapil S.; Grabbe, Shon

2000-01-01

76

FACET: SLAC___s New User Facility  

Microsoft Academic Search

FACET (Facility for Advanced Accelerator Experimental Tests) is a new User Facility at SLAC National Accelerator Laboratory. The first User Run started in spring 2012 with 20 GeV, 3 nC electron beams. The facility is designed to provide short (20 μm) bunches and small (20 μm wide) spot sizes, producing uniquely high power beams. FACET supports studies from many fields

2012-01-01

77

The biomechanical behavior on the interface of tumor arthrosis/allograft prosthetic composite by finite element analysis  

NASA Astrophysics Data System (ADS)

The biomechanical behavior of the uniting interface between the allograft bone and the autogenetic bone plays an important role in the treatment of the proximal femur massive defects with artificial tumor arthrosis/allograft prosthetic composite (TAAPC). According to the CT data of a patient, a 3D medical treatment model of TAAPC was established. Under the loads of 1.5 and 2.5 times standard body weight (70 kg), the mechanical behavior of the treatment model was analyzed by finite element analysis (FEA) for three typical healing periods. The results show that there are significant differences in the stress values and distribution in different healing periods. With healing of osteotomy, the hardness of the tissue of the uniting interface increases, the stress in uniting area was increased greatly and the stress concentration decreased. After cured the stress almost reached the level of normal bone. In the initial stage of healing, the healing training is not encouraged because there is an obvious risk of fracture of prosthesis and bone cement. In addition, porous hydroxyapatite (HA) ceramic used as bone tissue scaffold for this case, not only facilitates the generation of new bone, but also can avoid this risk caused by the non-uniting interface.

Chen, H. Z.; Jiang, W.; Zou, W.; Luo, J. M.; Chen, J. Y.; Tu, C. Q.; Xing, B. B.; Gu, Z. W.; Zhang, X. D.

2008-11-01

78

Facet development for a faceted stretched-membrane dish by Solar Kinetics, Inc  

SciTech Connect

A 3.6-meter diameter stretched-membrane optical facet for a parabolic dish has been successfully designed and demonstrated under contract with Sandia National Laboratories. Twelve facets identical to them will be used to make the lightweight reflector of the dish. The project goal of 2.5-mrad surface accuracy was met with each of the two full-sized prototypes, and accuracies of as low as 1.1 mrad were achieved. The facet weight is 11.7 kg/m{sup 2} (2.4lbs/ft{sup 2}). The facet is similar in construction to the successful stretched-membrane heliostat; it has two thin metal membranes attached to a ring. However, the front membrane for this facet is plastically formed at the factor in order to achieve a shorter facet f/D (approximately 3.0). A passive tether restrains the from membrane when not in operation, that is, when the stabilizing vacuum is off. The optical surface is achieved with a silvered-acrylic film laminated to the metal membrane. The facet is expected to cost $55.40/m{sup 2} at a production rate of 10,000 facets per year and $115, 000/m{sup 2}-at a production rate of 500 facets a year. Several key issues have been resolved. Stress concentrations due to seams in the reflective laminate did not cause membrane rupture during forming as they have for dishes with lower focal length-to-diameter ratios. The laminate survived the forming process and simulated operation without deterioration. The optical effect of the tether on the membrane was tested and found to be very small. Most important, highly accurate shapes were obtained using a simple forming procedure. Additional tests are needed to demonstrate process repeatablility and facet performance in typical operating conditions. 18 refs., 36 figs., 11 tabs.

Schertz, P.T.; Brown, D.C.; Konnerth, A. III (Solar Kinetics, Inc., Dallas, TX (United States)) [Solar Kinetics, Inc., Dallas, TX (United States)

1991-07-01

79

The facets of relativistic quantum field theory  

NASA Astrophysics Data System (ADS)

Relativistic quantum field theory is generally recognized to form the adequate theoretical frame for subatomic physics, with the Standard Model of Particle Physics as a major achievement. We point out that quantum field theory in its present form is not a monolithic theory, but rather consists of distinct facets, which aim at a common ideal goal. We give a short overview of the strengths and limitations of these facets. We emphasize the theory-dependent relation between the quantum fields, and the basic objects in the empirical domain, the particles. Given the marked conceptual differences between the facets, we argue to view these, and therefore also the Standard Model, as symbolic constructions. We finally note that this view of physical theories originated in the 19th century and is related to the emergence of the classical field as an autonomous concept.

Dosch, H. G.; Müller, V. F.

2010-04-01

80

The facets of relativistic quantum field theory  

NASA Astrophysics Data System (ADS)

Relativistic quantum field theory is generally recognized to form the adequate theoretical frame for subatomic physics, with the Standard Model of Particle Physics as a major achievement. We point out that quantum field theory in its present form is not a monolithic theory, but rather consists of distinct facets, which aim at a common ideal goal. We give a short overview of the strengths and limitations of these facets. We emphasize the theory-dependent relation between the quantum fields, and the basic objects in the empirical domain, the particles. Given the marked conceptual differences between the facets, we argue to view these, and therefore also the Standard Model, as symbolic constructions. We finally note that this view of physical theories originated in the 19th century and is related to the emergence of the classical field as an autonomous concept.

Dosch, H. G.; Müller, V. F.

2011-04-01

81

The elephant knee joint: morphological and biomechanical considerations.  

PubMed

Elephant limbs display unique morphological features which are related mainly to supporting the enormous body weight of the animal. In elephants, the knee joint plays important roles in weight bearing and locomotion, but anatomical data are sparse and lacking in functional analyses. In addition, the knee joint is affected frequently by arthrosis. Here we examined structures of the knee joint by means of standard anatomical techniques in eight African (Loxodonta africana) and three Asian elephants (Elephas maximus). Furthermore, we performed radiography in five African and two Asian elephants and magnetic resonance imaging (MRI) in one African elephant. Macerated bones of 11 individuals (four African, seven Asian elephants) were measured with a pair of callipers to give standardized measurements of the articular parts. In one Asian and three African elephants, kinematic and functional analyses were carried out using a digitizer and according to the helical axis concept. Some peculiarities of healthy and arthrotic knee joints of elephants were compared with human knees. In contrast to those of other quadruped mammals, the knee joint of elephants displays an extended resting position. The femorotibial joint of elephants shows a high grade of congruency and the menisci are extremely narrow and thin. The four-bar mechanism of the cruciate ligaments exists also in the elephant. The main motion of the knee joint is extension-flexion with a range of motion of 142 degrees . In elephants, arthrotic alterations of the knee joint can lead to injury or loss of the cranial (anterior) cruciate ligament. PMID:16420379

Weissengruber, G E; Fuss, F K; Egger, G; Stanek, G; Hittmair, K M; Forstenpointner, G

2006-01-01

82

Oracy: Social Facets of Language Learning  

ERIC Educational Resources Information Center

Researchers and educators have developed an interest in language development. Their studies focused on the cultural context in which language is learned and developed and its relationship to cognitive development. This article reviews the researchers' definitions on oracy and its social facets of language learning. Specifically, it reviews studies…

Saracho, Olivia N.; Spodek, Bernard

2007-01-01

83

Problem of Time: Facets and Machian Strategy  

E-print Network

The Problem of Time is that `time' in each of ordinary quantum theory and general relativity are mutually incompatible notions. This causes difficulties in trying to put these two theories together to form a theory of Quantum Gravity. The Problem of Time has 8 facets in canonical approaches. I clarify that all but one of these facets already occur at the classical level, and reconceptualize and re-name some of these facets as follows.The Frozen Formalism Problem becomes Temporal Relationalism, the Thin Sandwich Problem becomes Configurational Relationalism, via the notion of Best Matching. The Problem of Observables becomes the Problem of Beables, and the Functional Evolution Problem becomes the Constraint Closure Problem. I also outline how each of the Global and Multiple-Choice Problems of Time have their own plurality of facets. This article additionally contains a local resolution to the Problem of Time at the conceptual level and which is actually realizable for the relational triangle and minisuperspace models. This resolution is, moreover, Machian, and has three levels: classical, semiclassical and a combined semiclassical-histories-timeless records scheme. I end by delineating the current frontiers of this program toward resolution of the Problem of Time in the cases of full GR and of slightly inhomogeneous cosmology.

Edward Anderson

2013-06-25

84

Microreflectance inspection of diode laser front facets  

Microsoft Academic Search

We report on specular reflectivity measurements at the position of the waveguide at front facets of commercial diode laser arrays. Since the waveguide thickness is such semiconductor structures amounts about 1 micrometers an even better spatial resolution of the probe light spot is required. For this purpose, a micro-reflectance setup was designed and implemented. For re-locating the optically active region,

Fabian Doerfel; Stefan Nerreter; Jens W. Tomm; Ruediger Grunwald; R. Kunkel; Johann Luft

2002-01-01

85

Problem of time: facets and Machian strategy.  

PubMed

The problem of time is that "time" in each of ordinary quantum theory and general relativity are mutually incompatible notions. This causes difficulties in trying to put these two theories together to form a theory of quantum gravity. The problem of time has eight facets in canonical approaches. I clarify that all but one of these facets already occur at the classical level, and reconceptualize and re-name some of these facets as follows. The frozen formalism problem becomes temporal relationalism, the thin sandwich problem becomes configurational relationalism, via the notion of best matching. The problem of observables becomes the problem of beables, and the functional evolution problem becomes the constraint closure problem. I also outline how each of the global and multiple-choice problems of time have their own plurality of facets. This article additionally contains a local resolution to the problem of time at the conceptual level and which is actually realizable for the relational triangle and minisuperspace models. This resolution is, moreover, Machian, and has three levels: classical, semiclassical, and a combined semiclassical-histories-timeless records scheme. I end by delineating the current frontiers of this program toward resolution of the problem of time in the cases of full general relativity and of slightly inhomogeneous cosmology. PMID:25266113

Anderson, Edward

2014-10-01

86

Faceting ionic shells into icosahedra via electrostatics  

PubMed Central

Shells of various viruses and other closed packed structures with spherical topology exhibit icosahedral symmetry because the surface of a sphere cannot be tiled without defects, and icosahedral symmetry yields the most symmetric configuration with the minimum number of defects. Icosahedral symmetry is different from icosahedral-shaped structures, which include some large viruses, cationic–anionic vesicles, and fullerenes. We present a faceting mechanism of ionic shells into icosahedral shapes that breaks icosahedral symmetry resulting from different arrangements of the charged components among the facets. These self-organized ionic structures may favor the formation of flat domains on curved surfaces. We show that icosahedral shapes without rotational symmetry can have lower energy than spheres with icosahedral symmetry caused by preferred bending directions in the planar ionic lattice. The ability to create icosahedral shapes without icosahedral symmetry may lead to the design of new functional materials. The electrostatically driven faceting mechanism we present here suggests that we can design faceted polyhedra with diverse symmetries by coassembling oppositely charged molecules of different stoichiometric ratios. PMID:18003933

Vernizzi, Graziano; Olvera de la Cruz, Monica

2007-01-01

87

Synthesis of {100} Facet Dominant Anatase TiO2 Nanobelts and the Origin of Facet-Dependent Photoreactivity.  

PubMed

Sword-like anatase TiO2 nanobelts exposed with 78?% clean {100} facets were synthesized and the facet-dependent photoreactivity of anatase TiO2 was investigated. By quantitative comparison with the reference {001} facets, the {100} facets possessed about ten-times higher active sites density than that on {001} facets, resulting in higher photoreaction efficiency. After the active sites density normalization, the {100} and {001} facets exhibited distinct wavelength-dependent photocatalytic performance, attributed to the anisotropic electronic structures in TiO2 crystals. PMID:25255881

Pan, Feng; Wu, Kai; Li, Hexing; Xu, Guoqin; Chen, Wei

2014-11-10

88

Discriminant Validity of NEO-PIR Facet Scales  

Microsoft Academic Search

Two analyses were conducted to examine the discriminant validity of 30 facet scales from the Revised NEO Personality Inventory (NEO-PIR). To examine cross-observer validity of specific variance in the facet scales, partial correlations between self-reports and peer (N = 250) and spouse (N = 68) ratings on the facets were calculated, controlling for the five common factors. All 60 convergent

Robert R. McCrae; Paul T. Costa

1992-01-01

89

Results from Plasma Wakefield Experiments at FACET  

SciTech Connect

We report initial results of the Plasma Wakefield Acceleration (PWFA) Experiments performed at FACET - Facility for Advanced aCcelertor Experimental Tests at SLAC National Accelerator Laboratory. At FACET a 23 GeV electron beam with 1.8 x 10{sup 10} electrons is compressed to 20 {mu}m longitudinally and focused down to 10 {mu}m x 10 {mu}m transverse spot size for user driven experiments. Construction of the FACET facility completed in May 2011 with a first run of user assisted commissioning throughout the summer. The first PWFA experiments will use single electron bunches combined with a high density lithium plasma to produce accelerating gradients > 10 GeV/m benchmarking the FACET beam and the newly installed experimental hardware. Future plans for further study of plasma wakefield acceleration will be reviewed. The experimental hardware and operation of the plasma heat-pipe oven have been successfully commissioned. Plasma wakefield acceleration was not observed because the electron bunch density was insufficient to ionize the lithium vapor. The remaining commissioning time in summer 2011 will be dedicated to delivering the FACET design parameters for the experimental programs which will begin in early 2012. PWFA experiments require the shorter bunches and smaller transverse sizes to create the plasma and drive large amplitude wakefields. Low emittance and high energy will minimize head erosion which was found to be a limiting factor in acceleration distance and energy gain. We will run the PWFA experiments with the design single bunch conditions in early 2012. Future PWFA experiments at FACET are discussed in [5][6] and include drive and witness bunch production for high energy beam manipulation, ramped bunch to optimize tranformer ratio, field-ionized cesium plasma, preionized plasmas, positron acceleration, etc.. We will install a notch collimator for two-bunch operation as well as new beam diagnostics such as the X-band TCAV [7] to resolve the two bunches. With these new instruments and desired beam parameters in place next year, we will be able to complete the studies of plasma wakefield acceleration in the next few years.

Li, S.Z.; Clarke, C.I.; England, R.J.; Frederico, J.; Gessner, S.J.; Hogan, M.J.; Jobe, R.K.; Litos, M.D.; Walz, D.R.; /SLAC; Muggli, P.; /Munich, Max Planck Inst.; An, W.; Clayton, C.E.; Joshi, C.; Lu, W.; Marsh, K.A.; Mori, W.; Tochitsky, S.; /UCLA; Adli, E.; /U. Oslo

2011-12-13

90

Facet shapes in a Wulff crystal  

E-print Network

According to the Wulff construction the shape of the equilibrium crystal is determined by the surface tension considered as a function of the interface orientation. We present some (conjectured) approximate solutions and some rigorous results concerning this function, in the case of a lattice gas, and apply them to study the shape of the equilibrium crystal and, in particular, the shape of the facets of this crystal.

Salvador Miracle-Sole

2012-06-17

91

FACET: The New User Facility at SLAC  

SciTech Connect

FACET (Facility for Advanced Accelerator and Experimental Tests) is a new User Facility at SLAC National Accelerator Laboratory. Its high power electron and positron beams make it a unique facility, ideal for beam-driven Plasma Wakefield Acceleration studies. The first 2 km of the SLAC linac produce 23 GeV, 3.2 nC electron and positron beams with short bunch lengths of 20 {mu}m. A final focusing system can produce beam spots 10 {mu}m wide. User-aided Commissioning took place in summer 2011 and FACET will formally come online in early 2012. We present the User Facility, the current features, planned upgrades and the opportunities for further experiments. Accelerators are our primary tool for discovering the fundamental laws to the universe. Each new frontier we probe requires a new, more powerful method. Accelerators are therefore increasing in size and cost. The future of this field requires new accelerating techniques that can reach the high energies required over shorter distances. New concepts for high gradient acceleration include utilizing the wakes in plasma and dielectric and metallic structures. FACET was built to provide a test bed for novel accelerating concepts with its high charge and highly compressed beams. As a test facility unlike any other, it has also attracted groups interested in beam diagnostic techniques and terahertz studies. The first phase of the construction was completed in May 2011. Beam commissioning began in June and was interleaved with the installation of five experiments. Users were invited to aid with the commissioning for the month of August during which time experimental hardware and software were checked out and some first measurements were taken. FACET is currently in the process of becoming a Department of Energy User Facility for High Energy Physics.

Clarke, C.I.; Decker, F.J.; Erikson, R.; Hast, C.; Hogan, M.J.; Iverson, R.; Li, S.Z.; Nosochkov, Y.; Phinney, N.; Sheppard, J.; Wienands, U.; Woodley, M.; Yocky, G.; /SLAC; Seryi, A.; /Oxford U., JAI; Wittmer, W.; /Michigan State U.

2011-12-13

92

Scalable Faceted Ranking in Tagging Systems  

Microsoft Academic Search

\\u000a Nowadays, web collaborative tagging systems which allow users to upload, comment on and recommend contents, are growing. Such\\u000a systems can be represented as graphs where nodes correspond to users and tagged-links to recommendations. In this paper we\\u000a analyze the problem of computing a ranking of users with respect to a facet described as a set of tags. A straightforward\\u000a solution

José Ignacio Orlicki; J. Ignacio Alvarez-Hamelin; Pablo Ignacio Fierens

2009-01-01

93

Facet arthrography in an unusual presentation of a lumbar hemorrhagic synovial cyst.  

PubMed

An 84-year-old man experienced right buttock pain that radiated gradually to his right lower extremity over a few months before admission. MRI revealed a space occupying intraspinal lesion that was close to the right-sided L4-L5 facet joint and an extraspinal lesion posterior to the right-sided L5 lamina. The lesions appeared as hyperintense areas on T1 weighted images and heterogeneous areas on T2 weighted images. Facet arthrography under CT guidance revealed peripheral infiltration of the contrast medium only in the intraspinal lesion at early stages; subsequently, the contrast medium diffused into the extraspinal lesion, establishing a continuity of the right L4-L5 facet joint with both lesions, which were connected through the interlaminar space. A connection between the intraspinal and extraspinal lesions at the right-sided interlaminar space at the L4-L5 level was clearly noted during intraoperative examination. Histological examination revealed a hemorrhagic synovial cyst. PMID:22205756

Tofuku, Katsuhiro; Koga, Hiroaki; Komiya, Setsuro

2012-11-01

94

Microreflectance inspection of diode laser front facets  

NASA Astrophysics Data System (ADS)

We report on specular reflectivity measurements at the position of the waveguide at front facets of commercial diode laser arrays. Since the waveguide thickness is such semiconductor structures amounts about 1 micrometers an even better spatial resolution of the probe light spot is required. For this purpose, a micro-reflectance setup was designed and implemented. For re-locating the optically active region, e.g. after stepped-up operation time, we employ the photosensitivity of the active region by using the photocurrent induced by the probe beam for auto- alignment of the setup. We show for coated InGaAlAs/GaAs- single chip devices that during long-term operation the diode laser front facet reflectivity at the position of an emitter is almost constant with a slight tendency (about 0.002 at 633 nm) to increase. The results are explained in the framework of defect-induced refractive index changes within the semiconductor material close to the interface between waveguide and facet coating.

Doerfel, Fabian; Nerreter, Stefan; Tomm, Jens W.; Grunwald, Ruediger; Kunkel, R.; Luft, Johann

2002-04-01

95

Faceted Magnetron Device Using Discrete Current Sources  

NASA Astrophysics Data System (ADS)

A faceted magnetron concept has a cathode structure comprised of field emitters instead of the traditional thermionic cathode. The faceted magnetron structure has been modeled using the 3D particle-in-cell codes VORPAL 5.2 and ICEPIC. The two-dimensional particle trajectory simulation Lorentz2E has been used to model the electron injection from gated field emitters in a slit type structure. The sensitivity of the electron injection into the device was studied using Lorentz2E with the variation in the operating voltages in the cathode structure -as well as the location of the pusher electrode. Volume electron charge was considered in the sensitivity analysis. Surface charge was not included. Together with this work a model of a ten cavity rising sun magnetron was developed using VORPAL 5.2. A cylindrical and pentagonal-shaped cathode was modeled to study the variation of results due to the cathode shape. The results of this model are used to compare with results obtained from ICEPIC. Discrete current sources were also modeled to come from each facet of the pentagon-shaped cathode to study its effect on the magnetron operation. It is planned to generate velocity distributions of the electrons for the VORPAL input by using results generated with Lorentz2E.

Fernandez-Gutierrez, Sulmer; Browning, Jim; Smithe, David; Watrous, Jack

2012-10-01

96

Multi-faceted digital pyramid wavefront sensor  

NASA Astrophysics Data System (ADS)

The modulated pyramid wavefront sensor is known for its high sensitivity and adjustable dynamic range. The need for mechanically moving parts in a modulated pyramid wavefront sensor can be overcome by using the recently proposed digital pyramid wavefront sensor. In this paper, a digital multi-faceted pyramid wavefront sensor is demonstrated with the use of a reflecting phase-only spatial light modulator. The four-pupil digital pyramid wavefront sensor with 4-facets is extended to 6 and 8-facets. It is noted from the experiments performed under identical low-noise conditions that the performance of the wavefront sensor in terms of the root mean square wavefront error remains nearly the same in cases of four, six and eight pupil configurations. Under the circumstances elucidated here, the results of simulations indicate that in the presence of scatter noise, the pyramid wavefront sensor with greater number of pupils could lead to an improvement over the standard four-pupil pyramid wavefront sensor. Noise from scattering makes the choice of optimal modulation radius critical while sensing in open-loop adaptive optics systems.

Akondi, Vyas; Castillo, Sara; Vohnsen, Brian

2014-07-01

97

JPL tests of a LaJet concentrator facet  

SciTech Connect

A LaJet Energy Company (LEC) concentrator facet, 60 in. in diameter, was tested for imaging quality at the Jet Propulsion Laboratory using two methods: (1) autofocus tests with a point source of light at the facet's radius of curvature, and (2) tests with the sun close to the horizon as a distant source. These tests of the LaJet facet indicate that all of the solar image reflected by an LEC 460 solar concentrator made of like facets should fall within a 9-in. aperture if the outer facets are carefully adjusted. Such a concentrator would have acceptable performance, but complete evaluation must be made with an assembled concentrator.

Dennison, E.W.; Argoud, M.J.

1983-11-15

98

Subject-specific evaluation of patellofemoral joint biomechanics during functional activity.  

PubMed

Patellofemoral joint pain is a common problem experienced by active adults. However, relatively little is known about patellofemoral joint load and its distribution across the medial and lateral facets of the patella. In this study, biomechanical experiments and computational modeling were used to study patellofemoral contact mechanics in four healthy adults during stair ambulation. Subject-specific anatomical and gait data were recorded using magnetic resonance imaging, dynamic X-ray fluoroscopy, video motion capture, and multiple force platforms. From these data, in vivo tibiofemoral joint kinematics and knee muscle forces were computed and then applied to a deformable finite-element model of the patellofemoral joint. The contact force acting on the lateral facet of the patella was 4-6 times higher than that acting on the medial facet. The peak average patellofemoral contact stresses were 8.2±1.0 MPa and 5.9±1.3 MPa for the lateral and medial patellar facets, respectively. Peak normal compressive stress and peak octahedral shear stress occurred near toe-off of the contralateral leg and were higher on the lateral facet than the medial facet; furthermore, the peak compressive stress (11.5±3.0 MPa) was higher than the peak octahedral shear stress (5.2±0.9 MPa). The dominant stress pattern on the lateral patellar facet corresponded well to the location of maximum cartilage thickness. Higher loading of the lateral facet is also consistent with the clinical observation that the lateral compartment of the patellofemoral joint is more prone to osteoarthritis than the medial compartment. Predicted cartilage contact stress maps near contralateral toe-off showed three distinctly different patterns: peak stresses located on the lateral patellar facet; peak stresses located centrally between the medial and lateral patellar facets; and peak stresses located superiorly on both the medial and lateral patellar facets. PMID:24998901

Akbarshahi, Massoud; Fernandez, Justin W; Schache, Anthony G; Pandy, Marcus G

2014-09-01

99

Nanoparticle growth. Facet development during platinum nanocube growth.  

PubMed

An understanding of how facets of a nanocrystal develop is critical for controlling nanocrystal shape and designing novel functional materials. However, the atomic pathways of nanocrystal facet development are mostly unknown because of the lack of direct observation. We report the imaging of platinum nanocube growth in a liquid cell using transmission electron microscopy with high spatial and temporal resolution. The growth rates of all low index facets are similar until the {100} facets stop growth. The continuous growth of the rest facets leads to a nanocube. Our calculation shows that the much lower ligand mobility on the {100} facets is responsible for the arresting of {100} growing facets. These findings shed light on nanocrystal shape-control mechanisms and future design of nanomaterials. PMID:25146287

Liao, Hong-Gang; Zherebetskyy, Danylo; Xin, Huolin; Czarnik, Cory; Ercius, Peter; Elmlund, Hans; Pan, Ming; Wang, Lin-Wang; Zheng, Haimei

2014-08-22

100

A delayed diagnosis of bilateral facet dislocation of the cervical spine: a case report  

PubMed Central

Objective: To review the case of a patient suffering from bilateral facet dislocation of the cervical spine. Clinical features: A 53-year-old male was involved in a car accident and was transported to the hospital. Cervical radiographs were taken at the emergency department and interpreted as normal. Four days later, he consulted a chiropractor where radiographs of the cervical spine were repeated. The examination revealed bilateral cervical facet joint dislocation at C5–C6 as well as a fracture involving the spinous process and laminae of C6. Intervention and outcome: The patient was referred to the hospital and underwent surgery. Conclusion: Patients involved in motor vehicle accidents often consult chiropractors for neck pain treatment. A high index of suspicion due to significant history and physical examination findings should guide the clinician in determining the need for reviewing the initial radiographs (if taken and available) or request repeat studies, regardless of the initial imaging status. PMID:24587496

O'Shaughnessy, Julie; Grenier, Julie-Marthe; Stern, Paula J.

2014-01-01

101

FIRO-B: factors and facets.  

PubMed

10 FIRO-B intercorrelation matrices were factor analysed; one matrix was derived from new FIRO-B data, all the other matrices were found in the literature. The correlation matrices were also subjected to meta-analysis. The findings suggested that the four FIRO-B scales associated with Inclusion and Affection are facets of the ubiquitous interpersonal superfactor, Nurturance, but the two FIRO-B Control scales each express an orthogonal construct both of which relate to the super-factor, Dominance. PMID:10778286

Macrosson, W D

2000-02-01

102

Fabrication of faceted nanopores in magnesium  

SciTech Connect

In this paper, using high resolution transmission electron microscopy, we showed the fabrication of faceted nanopores with various shapes in magnesium by focused electron beam (e-beam). The characteristics of nanopore shapes and the crystallographic planes corresponding to the edges of the nanopores were discussed in detail. Interestingly, by manipulating the e-beam (e.g., irradiation direction and duration), the nanopore shape and size could be effectively controlled along different directions. Our results provide important insight into the nanopore patterning in metallic materials and are of fundamental importance concerning the relevant applications, such as nanopore-based sensor, etc.

Wu, Shujing; Cao, Fan; Zheng, He; Sheng, Huaping; Liu, Chun; Liu, Yu; Zhao, Dongshan; Wang, Jianbo, E-mail: wang@whu.edu.cn [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072 (China)] [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072 (China)

2013-12-09

103

Spontaneous septic arthritis of the lumbar facet caused by methicillin-resistant Staphylococcus aureus in an otherwise healthy adolescent.  

PubMed

We report the case of a 16-year-old boy with isolated septic arthritis of a lumbar facet. This rare presentation of an infection in a lumbar facet joint occurred after minor trauma sustained in a football game. Septic arthritis of the spinal facet joint is an uncommon phenomenon. Only 5 cases have been reported in immunocompromised pediatric patients. To our knowledge, no case of septic arthritis in an immunocompetent pediatric patient has been reported. An otherwise healthy 16-year-old boy presented with 4 weeks of escalating back pain after a minor athletics-related trauma. Evaluation showed incapacitating pain, lumbar musculature spasms, and the absence of fever, hemodynamic, or neurologic changes. Laboratory values were within normal limits. Magnetic resonance images showed a fluid collection within the L3-L4 facet and a localized abscess. Computed tomographic-guided aspiration showed methicillin-resistant Staphylococcus aureus infection, for which the patient received 6 weeks of vancomycin with complete resolution of symptoms. Refractory lumbago in an adolescent requires careful evaluation. PMID:25046186

Papaliodis, Dean N; Roberts, Timothy T; Richardson, Nicholas G; Lawrence, James B

2014-07-01

104

An Integrated Facet-Based Library for Arbitrary Software Components  

NASA Astrophysics Data System (ADS)

Reuse is an important means of reducing costs and effort during the development of complex software systems. A major challenge is to find suitable components in a large library with reasonable effort. This becomes even harder in today's development practice where a variety of artefacts such as models and documents play an equally important role as source code. Thus, different types of heterogeneous components exist and require consideration in a component search process. One flexible approach to structure (software component) libraries is faceted classification. Faceted classifications and in particular faceted browsing are nowadays widely used in online systems. This paper takes a fresh approach towards using faceted classification in heterogeneous software component libraries by transferring faceted browsing concepts from the web to software component libraries. It presents an architecture and implementation of such a library. This implementation is used to evaluate the applicability of facets in the context of an industry-driven case study.

Schmidt, Matthias; Polowinski, Jan; Johannes, Jendrik; Fernández, Miguel A.

105

Facet-sparing lumbar decompression with a minimally invasive flexible MicroBlade Shaver® versus traditional decompression: quantitative radiographic assessment  

PubMed Central

Background Laminectomy/laminotomy and foraminotomy are well established surgical techniques for treatment of symptomatic lumbar spinal stenosis. However, these procedures have significant limitations, including limited access to lateral and foraminal compression and postoperative instability. The purpose of this cadaver study was to compare bone, ligament, and soft tissue morphology following lumbar decompression using a minimally invasive MicroBlade Shaver® instrument versus hemilaminotomy with foraminotomy (HL). Methods The iO-Flex® system utilizes a flexible over-the-wire MicroBlade Shaver instrument designed for facet-sparing, minimally invasive “inside-out” decompression of the lumbar spine. Unilateral decompression was performed at 36 levels in nine human cadaver specimens, six with age-appropriate degenerative changes and three with radiographically confirmed multilevel stenosis. The iO-Flex system was utilized on alternating sides from L2/3 to L5/S1, and HL was performed on the opposite side at each level by the same investigator. Spinal canal, facet joint, lateral recess, and foraminal morphology were assessed using computed tomography. Results Similar increases in soft tissue canal area and decreases in ligamentum flavum area were noted in nondiseased specimens, although HL required removal of 83% more laminar area (P < 0.01) and 95% more bone resection, including the pars interarticularis and facet joints (P < 0.001), compared with the iO-Flex system. Similar increases in lateral recess diameter were noted in nondiseased specimens using each procedure. In stenotic specimens, the increase in lateral recess diameter was significantly (P = 0.02) greater following use of the iO-Flex system (43%) versus HL (7%). The iO-Flex system resulted in greater facet joint preservation in nondiseased and stenotic specimens. In stenotic specimens, the iO-Flex system resulted in a significantly greater increase in foraminal width compared with HL (24% versus 4%, P = 0.01), with facet joint preservation. Conclusion The iO-Flex system resulted in significantly better decompression of the lateral recess and foraminal areas compared with HL, while preserving posterior spinal elements, including the facet joint. PMID:22879740

Lauryssen, Carl; Berven, Sigurd; Mimran, Ronnie; Summa, Christopher; Sheinberg, Michael; Miller, Larry E; Block, Jon E

2012-01-01

106

Faceted ceramic fibers, tapes or ribbons and epitaxial devices therefrom  

DOEpatents

A crystalline article includes a single-crystal ceramic fiber, tape or ribbon. The fiber, tape or ribbon has at least one crystallographic facet along its length, which is generally at least one meter long. In the case of sapphire, the facets are R-plane, M-plane, C-plane or A-plane facets. Epitaxial articles, including superconducting articles, can be formed on the fiber, tape or ribbon.

Goyal, Amit (Knoxville, TN)

2012-07-24

107

Moire Superstructures of Graphene on Faceted Nickel Islands  

E-print Network

, Colorado 80401, United States G raphene, a two-dimensional (2D) single crystal of carbon atoms ar- ranged synthesized via thermal car- burization of SiC(0001)5 and by surface seg- regation of carbon dissolved observed to grow seamlessly, as single crystals, across adjacent (111) and (110) facets and over the facet

Ciobanu, Cristian

108

Faceted grating prism for a computed tomographic imaging spectrometer  

E-print Network

Faceted grating prism for a computed tomographic imaging spectrometer Michael W. Kudenov Julia://opticalengineering.spiedigitallibrary.org/ on 02/04/2013 Terms of Use: http://spiedl.org/terms #12;Faceted grating prism for a computed tomographic imaging spectrometer Michael W. Kudenov Julia Craven-Jones The University of Arizona College of Optical

Dereniak, Eustace L.

109

Possible burst-like facet growth mode at high temperatures  

NASA Astrophysics Data System (ADS)

A decade ago, a burst-like growth mode of c-facets of 4He crystals growing at mK temperatures, characterized by the alternation of time intervals during which the facet does not advance with the intervals of its fast advancement, was found [J.P. Ruutu, P.J. Hakonen, A.V. Babkin, A.Y. Parshin, J.S. Penttilä, J.P. Saramäki, G. Tvalashvili, Phys. Rev. Lett. 76 (1996) 4187]. We investigate the possibility that a similar facet growth mode exists for facets at high growth temperatures. We have applied the digital laser interferometry for monitoring facet kinetics of spherical copper selenide single crystals during their growth at constant volume growth rate around 800 K. Our analysis of directly measured (1 1 1) facet advancement curves has revealed that they consist of time intervals during which the facet does not advance vertically alternating with the time intervals of enhanced growth, resembling the burst-like facet growth mode. The results are discussed in terms of the enhancement of the local supersaturation induced by the existence of nucleation barrier.

Lovri?, Davorin; Vu?i?, Zlatko; Gladi?, Jadranko

2008-07-01

110

Faceted Ranking of Egos in Collaborative Tagging Systems  

Microsoft Academic Search

Multimedia uploaded content is tagged and recom- mended by users of collaborative systems, resulting in informal classifications also known as folksonomies. Faceted web ranking has been proved a reasonable alternative to a single ranking which does not take into account a personalized context. In this paper we analyze the online computation of rankings of users associated to facets made up

Jose Ignacio Orlicki; Pablo Ignacio Fierens; José Ignacio Alvarez-Hamelin

2008-01-01

111

Thin-shell model for faceting of multicomponent elastic vesicles  

NASA Astrophysics Data System (ADS)

We use a discretized version of a thin elastic shell model to show that a two-component elastic vesicle can lower its energy by faceting into a wide variety of polyhedral shapes. The elastic shell model allows us to completely remove effects of the topological defects necessarily present in spherical topology. Therefore, we show that the faceting mechanism of multicomponent elastic vesicles is fundamentally different than the familiar defect-driven buckling into icosahedra. We present a detailed gallery of faceted shapes and discuss how the interplay between bending and stretching energies leads to faceting. Present work extends our recent study of the faceting of a two-component shell in the presence of topological defects [1]. [1] G. Vernizzi, R. Sknepnek, M. Olvera de la Cruz, Proc. Natl. Acad. Sci. USA 108, 4292 (2011).

Sknepnek, Rastko; Olvera de La Cruz, Monica

2012-02-01

112

Brief communication: coracoclavicular joint in Northwest Indians.  

PubMed

The incidence of an articular facet on the conoid tubercle of the clavicle indicating the presence of a coracoclavicular joint was studied in paired clavicles obtained from 1,000 adult subjects aged 18 to 95 years (748 males, 252 females), and 75 children (45 males, 30 females) of known age on whom a medicolegal postmortem had been performed by the second author during 1972-90. The subjects were inhabitants of northwest India. In addition, paired clavicles from 50 neonates and 35 fetuses were also examined. The facet was absent in the fetuses, neonates, and young children. The youngest clavicle showing the facet was from a girl of 13 years, in which it was present bilaterally. In adults the incidence of the facet was 10.1% (bilateral 5.7%, unilateral 4.4%) in males and 8.3% (bilateral 3.6%, unilateral 4.8%) in females. Absence of the facet in the fetuses, neonates, and young children shows that it is not a congenital anomaly. PMID:1928318

Kaur, H; Jit, I

1991-08-01

113

Ultra-steep side facets in multi-faceted SiGe/Si(001) Stranski-Krastanow islands.  

PubMed

For the prototypical Ge/Si(001) system, we show that at high growth temperature a new type of Stranski-Krastanow islands is formed with side facets steeper than {111} and high aspect ratio. Nano-goniometric analysis of the island shapes reveals the presence of six new facet groups in addition to those previously found for dome or barn-shaped islands. Due to the highly multi-faceted island shape and high aspect ratio, the new island types are named "cupola" islands and their steepest {12 5 3} side facet is inclined by 68°to the substrate surface. Assessing the relative stability of the new facets from surface area analysis, we find that their stability is similar to that of {113} and {15 3 23} facets of dome islands. The comparison of the different island shapes shows that they form a hierarchical class of geometrical structures, in which the lower aspect ratio islands of barns, domes and pyramids are directly derived from the cupola islands by successive truncation of the pedestal bases without facet rearrangements. The results underline the key role of surface faceting in the process of island formation, which is as crucial for understanding the island's growth evolution as it is important for device applications. PMID:21711579

Brehm, Moritz; Lichtenberger, Herbert; Fromherz, Thomas; Springholz, Gunther

2011-01-01

114

Personality and life satisfaction: a facet-level analysis.  

PubMed

At the global level of the Big Five, Extraversion and Neuroticism are the strongest predictors of life satisfaction. However, Extraversion and Neuroticism are multifaceted constructs that combine more specific traits. This article examined the contribution of facets of Extraversion and Neuroticism to life satisfaction in four studies. The depression facet of Neuroticism and the positive emotions/cheerfulness facet of Extraversion were the strongest and most consistent predictors of life satisfaction. These two facets often accounted for more variance in life satisfaction than Neuroticism and Extraversion. The findings suggest that measures of depression and positive emotions/cheerfulness are necessary and sufficient to predict life satisfaction from personality traits. The results also lead to a more refined understanding of the specific personality traits that influence life satisfaction: Depression is more important than anxiety or anger and a cheerful temperament is more important than being active or sociable. PMID:15257789

Schimmack, Ulrich; Oishi, Shigehiro; Furr, R Michael; Funder, David C

2004-08-01

115

Faceting of Cu(210) and Ni(210) by activated nitrogen  

NASA Astrophysics Data System (ADS)

The interactions of activated nitrogen (AN) with Cu(210) and Ni(210) and of O 2 with Ni(210) have been studied using LEED, RHEED and AES. Exposure to AN at 290 K produces (100) facets with a c(11 ?2 × ?2)R45°-N overlayer; on warming (520 K) in vacuum, (110) facets with a p(2 × 3)-N overlayer appear. Heating to 600 K causes desorption of N 2 and regeneration of the (210) surface. With O 2 on Ni(210) complicated facet patterns are observed. Facet orientations have been identified by a simple method involving rotation of the crystal. The results are discussed in relation to the stabilities of various Cu surfaces, particularly (410) and (530), in the presence of AN and O 2.

Kirby, R. E.; McKee, C. S.; Renny, L. V.

1980-07-01

116

Facette : using facets to improve tag-based bookmarking  

E-print Network

Facette is a web service that uses facets to enhance the organizational capabilities of tag-based bookmarking systems. As with other bookmarking services, Facette allows users to associate tags with bookmarks to assist the ...

Lai, Peter (Peter J.)

2009-01-01

117

Hydrothermal growth of multi-facet anatase spheres  

NASA Astrophysics Data System (ADS)

Titania with various nanostructures can be synthesized by several F --mediated procedures. In this paper, we report the synthesis of a novel multi-facet microsphere consisting of etched single-crystalline anatase by simply immersing metallic Ti plates in an HF aqueous solution under hydrothermal conditions. The etched multi-facet sphere was found to grow through the nucleation and growth of truncated bipyramids on a previously precipitated one to assemble a microsphere, and its subsequent etching by HF to expose the thermodynamic stable {1 0 1} facets. The photocatalytic activity of such etched multi-facet sphere thin films was evaluated utilizing rhodamine B and sulfonic salicylic acid in water as target molecules and compared with commercial Degussa P25 titania nanoparticles.

Wu, Jin-Ming; Song, Xiao-Mei; Ma, Lu-Yao; Wei, Xiao-Dan

2011-03-01

118

Analysis on linac quadrupole misalignment in FACET commissioning 2012  

SciTech Connect

In this note, the analysis on linac quadrupole misalignment is presented for the FACET linac section LI05-09 plus LI11-19. The effectiveness of the beam-based alignment technique is preliminarily confirmed by the measurement. Beam-based alignment technique was adopted at SLAC linac since SLC time. Here the beam-based alignment algorithms are further developed and applied in the FACET commissioning during 2012 run.

Sun, Yipeng; /SLAC

2012-07-05

119

Birth-order effects on facets of extraversion  

Microsoft Academic Search

The present study investigated the reasons for inconsistent findings concerning birth-order effects and extraversion. According to Sulloway (1995, 1996), one would expect first-born siblings to rate higher on one of the facets, dominance, and later-born siblings to rate higher on the other facet, sociability. In a within-family design, 96 undergraduate and graduate students rated themselves and their siblings on a

Emma Beck; Katriina L. Burnet; Jane Vosper

2006-01-01

120

Utility of a faceted catalog for scholarly research  

Microsoft Academic Search

Purpose – The purpose of this paper is to determine whether a faceted OPAC interface offers improvements to information discovery in scholarly research. Design\\/methodology\\/approach – The 5.2 million records of an entire library catalog were loaded into a faceted navigation interface and an attractive search term suggestion tool. Humanities PhD students at the dissertation level and familiar with this collection

Tod A. Olson

2007-01-01

121

Structural Equation Modelling of Multiple Facet Data: Extending Models for Multitrait-Multimethod Data  

ERIC Educational Resources Information Center

This paper is about the structural equation modelling of quantitative measures that are obtained from a multiple facet design. A facet is simply a set consisting of a finite number of elements. It is assumed that measures are obtained by combining each element of each facet. Methods and traits are two such facets, and a multitrait-multimethod…

Bechger, Timo M.; Maris, Gunter

2004-01-01

122

Low index faceting of Pt nanostructures on oxide surface with potential application for fuel cells  

NASA Astrophysics Data System (ADS)

Anneal induced faceting of platinum (Pt) thin film is being studied by atomic force microscopy. We find that at 700 °C faceting occurs by first forming percolation clusters. The nanodots form low index facets with the substrate and with various geometric shapes parallel to the substrate. Time dependent coarsening kinetics shows Lifsitz-Slyozov/Wagner type diffusion therefore indicating Oswald ripening. Low index faceting of Pt nanodots is also stepped/faceted showing its potential application for efficient fuel cells.

Aurongzeb, Deeder

2007-09-01

123

How Many Facets are Needed to Represent the Surface Energy Balance of an Urban Area?  

Microsoft Academic Search

We investigate the question of how many facets are needed to represent the energy balance of an urban area by developing simplified\\u000a 3-, 2- and 1-facet versions of a 4-facet energy balance model of two-dimensional streets and buildings. The 3-facet model\\u000a simplifies the 4-facet model by averaging over the canyon orientation, which results in similar net shortwave and longwave\\u000a balances

Aurore Porson; Ian N. Harman; Sylvia I. Bohnenstengel; Stephen E. Belcher

2009-01-01

124

How Many Facets are Needed to Represent the Surface Energy Balance of an Urban Area?  

Microsoft Academic Search

We investigate the question of how many facets are needed to represent the energy balance of an urban area by developing simplified 3-, 2- and 1-facet versions of a 4-facet energy balance model of two-dimensional streets and buildings. The 3-facet model simplifies the 4-facet model by averaging over the canyon orientation, which results in similar net shortwave and longwave balances

Aurore Porson; Ian N. Harman; Sylvia I. Bohnenstengel; Stephen E. Belcher

2009-01-01

125

Joint Occupancy.  

ERIC Educational Resources Information Center

This annotated bibliography includes summaries of 15 articles and reports dealing with the joint use of buildings and facilities by schools and other public or private organizations. An introductory section describes the historical origins and development of the joint occupancy concept and examines the various economic and philosophical arguments…

Higham, Charlene Ellison

126

Ceramic joints  

DOEpatents

Butt joints between materials having different coefficients of thermal expansion are prepared having a reduced probability of failure of stress facture. This is accomplished by narrowing/tapering the material having the lower coefficient of thermal expansion in a direction away from the joint interface and not joining the narrow-tapered surface to the material having the higher coefficient of thermal expansion.

Miller, Bradley J. (Worcester, MA); Patten, Jr., Donald O. (Sterling, MA)

1991-01-01

127

Gold coverage and faceting of MBE grown silicon nanowires  

NASA Astrophysics Data System (ADS)

In this paper, we investigate the faceting of molecular beam epitaxy (MBE) grown nanowires and the post-growth repartition of the gold used as catalyst. Electron microscopy analysis are performed using Scanning Transmission Electron Microscopy - High Angle Annular Dark Field (STEM-HAADF), electron tomography, and Energy-dispersive X-ray spectroscopy (EDS) to collect complementary information. The nanowires present very little to no faceting at the very top, very close to the catalyst, suggesting the nanowires grow with a quasi-circular section at the early stages of growth. The nanowires are then found to have an hexagonal and/or dodecagonal section and present a finer ‘saw-tooth’ faceting on the main faces. We find gold clusters spread on the surfaces of the nanowires, but we could not observe any gold inside the nanowires. Furthermore, the gold coverage is uneven on the different facets of the nanowire. The creation of these facets and the gold coverage are two linked phenomena balancing each other.

David, Thomas; Roussel, Luc; Neisius, Thomas; Cabie, Martiane; Gailhanou, Marc; Alfonso, Claude

2013-11-01

128

Investigating facets of personality in adult pathological gamblers with ADHD  

PubMed Central

SUMMARY The present study explored facets of personality in a sample of pathological gamblers with ADHD (n = 52) and without ADHD (n = 43). Participants were assessed for psychopathology and gambling disorders using the Mini International Neuropsychiatric Interview, the National Opinion Research Center DSM Screen for Gambling Problems, and the Adult ADHD Self-Report Scale. Facets of personality were assessed using the NEO Personality Inventory–Revised. Group differences emerged across several facets of personality when analyzed using multivariate statistics. Although both groups experienced difficulties in several areas compared with norming data (e.g., greater depression, higher impulsivity, lower self-esteem and lower self-discipline), these facets of personality were more pronounced in pathological gamblers with ADHD. Most notable among these differences are tendencies for gamblers with ADHD to experience greater levels of emotional instability, interpersonal sensitivity and stress proneness. Pathological gamblers with ADHD also appear to experience lower self-esteem, greater difficulty being assertive and lower levels of self-discipline. Surprisingly, both groups were comparable on facets of impulsivity. These findings suggest that pathological gamblers diagnosed with adult ADHD may experience additional challenges compared with pathological gamblers without ADHD. PMID:22815658

Davtian, Margarit; Reid, Rory C; Fong, Timothy W

2012-01-01

129

Surgical treatment of Rockwood grade-V acromioclavicular joint dislocations  

PubMed Central

Background and purpose Long-term outcome after surgery for grade-V acromioclavicular joint dislocation has not been reported. We performed a retrospective analysis of functional and radiographic outcome 15–22 years after surgery. Patients and methods We examined 50 patients who were treated at our hospital between April 1985 and December 1993. Various methods of stabilization were used: K-wires (n = 36), 4.5-mm screw (n = 12), or biodegradable screw (n = 2). Osteosynthesis material was removed after 6–8 weeks. Mean follow-up time was 18 (15–22) years. Outcomes were assessed with the Constant shoulder (CS) score, Disabilities of the Arm, Shoulder, and Hand (DASH) score, the simple shoulder test (SST), the Copeland shoulder impingement test, the cross-arm test, pain, stability of the AC joint, and complications. From radiographs, we evaluated AC and glenohumeral (GH) arthrosis, osteolysis of the lateral clavicle, and alignment of the clavicle with the acromion. Results Mean values were 90 (75–100) in CS score, 5.1 (0–41) in DASH score, and 11 (2–12) in SST. There was no statistically significant difference in CS score between the injured shoulder and the uninjured shoulder. The AC joint was clinically stable in 42 patients. In 38 patients, the clavicle alignment with the acromion was normal in radiographs. Lateral clavicle osteolysis (10 patients) appeared to be associated with permanent AC joint dislocation. Interpretation Surgery with a temporary fixation for acute grade-V AC joint dislocation leads to successful long-term functional results. Only minor disability occurred in some patients. PMID:23409813

2013-01-01

130

Titanium dioxide nanoswords with highly reactive, photocatalytic facets  

NASA Astrophysics Data System (ADS)

Titanium dioxide (TiO2) is one of the most widely studied and important materials for catalysis, photovoltaics, and surface science applications, but the ability to consistently control the relative exposure of higher surface energy facets during synthesis remains challenging. Here, we present the repeatable synthesis of highly reactive, rutile {001} or {101} facets on broad, sword-shaped TiO2 nanostructures rapidly synthesized in minutes. Growth occurs along planes of lower surface energy, repeatedly yielding nanostructures with large, high energy facets. The quantitative photocatalytic reactivity of the nanoswords, demonstrated by the photoreduction of silver, is over an order of magnitude higher than reference low energy TiO2{110} substrates. Therefore, the higher surface energy dominated TiO2 nanoswords are ideal structures for characterizing the physicochemical properties of rutile TiO2, and may be used to enhance a variety of catalytic, optical, and clean-technology applications.

Sosnowchik, Brian D.; Chiamori, Heather C.; Ding, Yong; Ha, Jong-Yoon; Wang, Zhong Lin; Lin, Liwei

2010-12-01

131

Mapping Mindfulness Facets onto Dimensions of Anxiety and Depression  

PubMed Central

Background Mindfulness has been associated with anxiety and depression, but the ways in which specific facets of mindfulness relate to symptoms of anxiety and depression remains unclear. The purpose of the current study was to investigate associations between specific facets of mindfulness (e.g., observing, describing, nonjudging, acting with awareness, and nonreactivity) and dimensions of anxiety and depression symptoms (e.g., anxious arousal, general distress-anxiety, general distress-depression, and anhedonic depression) while controlling for shared variance among variables. Methods Participants were 187 treatment-seeking adults. Mindfulness was measured using the Five Facet Mindfulness Questionnaire and symptoms of depression and anxiety were measured using the Mood and Anxiety Symptom Questionnaire. Results Bivariate correlations showed that all facets of mindfulness were significantly related to all dimensions of anxiety and depression with two exceptions: describing was unrelated to general distress -anxiety, and observing was unrelated to all symptom clusters. Path analysis was used to simultaneously examine associations between mindfulness facets and depression and anxiety symptoms. Significant and marginally significant pathways were retained to construct a more parsimonious model and model fit indices were examined. The parsimonious model indicated that nonreactivity was significantly inversely associated with general distress anxiety symptoms. Describing was significantly inversely associated with anxious arousal, while observing was significantly positively associated with it. Nonjudging and nonreactivity were significantly inversely related to general distress-depression and anhedonic depression symptomatology. Acting with awareness was not significantly associated with any dimensions of anxiety or depression. Conclusions Findings support associations between specific facets of mindfulness and dimensions of anxiety and depression and highlight the potential utility of targeting these specific aspects of mindfulness in interventions for anxiety and mood disorders. PMID:23768665

Desrosiers, Alethea; Klemanski, David H.; Nolen-Hoeksema, Susan

2014-01-01

132

Pervasive Social Computing: Augmenting Five Facets of Human Intelligence  

Microsoft Academic Search

Pervasive Social Computing is a novel collective paradigm, derived from pervasive computing, social media, social networking, social signal processing, etc. This paper reviews Pervasive Social Computing as an integrated computing environment, which promises to augment five facets of human intelligence in physical environment awareness, behavior awareness, community awareness, interaction awareness, and content awareness. Reviews of related studies are given and

Jiehan Zhou; Junzhao Sun; Kumaripaba Athukorala; Dinesh Wijekoon

2010-01-01

133

The Development of Artificial Immune System in Topographic Facet  

Microsoft Academic Search

This paper explores artificial immune system in feature extraction mechanism. Certain important features like robustness, dynamic, adaptive, error tolerant, distributive are key features of natural immune system. These features have a detailed description. We have used adaptive immune system to develop this extraction method successfully. The terrain has several facets such as water, vegetation, urban, denseurban, barren and many more.

Bidisha Das; Preeti Kumari; Rachna Jindal; Rashmi Rameshwari

2011-01-01

134

FACETS: Framework Application for Core-Edge Transport Simulations  

E-print Network

, in particular of each of the aspects of a fusion confinement device. LBNL IU MIT NYU Lodestar GA Self (Physics); CSU (AM); ORNL (CS, perf); ParaTools (CS, perf) · Appended SAP: GA, ORNL · Advisory: Columbia + MHD; volumetric; diagnostic; data flow) ­ FACETS (Core + Edge + Wall; surfacial; implicit; message

135

Exploring Facets of Personality and Escapism in Pathological Gamblers  

Microsoft Academic Search

This study explored facets of personality between pathological gamblers (n = 69) and nonpathological gamblers (n = 55) in a convenience sample in Los Angeles, California. Pathological gamblers were more prone to mood disturbance, impulsivity, feelings of frustration, interpersonal sensitivity, vulnerability to distress, and distrust of others as measured by the NEO Personality Inventory–Revised. Pathological gamblers also reported diminished competence

Rory C. Reid; Desiree S. Li; Jean Lopez; Michael Collard; Iman Parhami; Reef Karim; Timothy Fong

2011-01-01

136

Where Does Metonymy Stop? Senses, Facets, and Active Zones  

Microsoft Academic Search

The purpose of this article is to propose a constrained lexical semantic definition of referential metonymy within a model of meaning as ontology and construal. Due to their various types of lexical-referential pairings, 3 types of construals that are fre- quently referred to as metonymy in the cognitive literature are distinguished as metonymization, facetization, and zone activation. Metonymization involves the

Carita Paradis

2004-01-01

137

Multiple Facets of Inequity in Racial and Ethnic Achievement Gaps  

ERIC Educational Resources Information Center

This article provides a critical look into national trends of the achievement gaps between Whites and Blacks and between Whites and Hispanics over the last 3 decades based on the National Assessment of Educational Progress mathematics assessments. It examines multiple facets of inequity underlying the racial and ethnic achievement gaps from 3…

Lee, Jaekyung

2004-01-01

138

Exploratory Patent Search with Faceted Search and Configurable Entity Mining  

E-print Network

Exploratory Patent Search with Faceted Search and Configurable Entity Mining Pavlos Fafalios1 Searching for patents is usually a recall-oriented problem and depending on the patent search type, quite. We propose an exploratory strategy for patent search that exploits the metadata already available

Tzitzikas, Yannis

139

Personality Facets and RIASEC Interests: An Integrated Model  

ERIC Educational Resources Information Center

Research examining links between personality and interest have typically focused on links between measures of the five factor model and Holland's RIASEC types. However, the five factor model of personality can be divided in to a larger set of narrow domain personality scales measuring facets of the "big five" traits. Research in a number of fields…

Armstrong, Patrick Ian; Anthoney, Sarah Fetter

2009-01-01

140

Clique-based facets for the precedence constrained knapsack ...  

E-print Network

Dec 19, 2005 ... for network design and other related problems. ... In this paper, we determine facet-defining inequalities for the convex hull conv(P) of the PCKP ...... I.: A study of part type selection approaches for short-term production plan-.

141

MULTI-FACETED SUSTAINABILITY ON ITHACA COLLEGE NATURAL LANDS  

EPA Science Inventory

This student-generated proposal presents a multi-faceted program for sustainable stewardship of the natural areas south of the built campus of Ithaca College. Our challenge is to use student research and class projects to enhance biodiversity, support education and research, and...

142

The Steiner tree problem II: Properties and classes of facets  

Microsoft Academic Search

This is the second part of two papers addressing the study of the facial structure of the Steiner tree polyhedron. In this paper we identify several classes of facet defining inequalities and relate them to special classes of graphs on which the Steiner tree problem is known to be NP-hard.

Sunil Chopra; M. R. Rao

1994-01-01

143

Empirical Identification of the Major Facets of Conscientiousness  

ERIC Educational Resources Information Center

Conscientiousness is often found to predict academic outcomes, but is defined differently by different models of personality. High school students (N = 291) completed a large number of Conscientiousness items from different models and the Big Five Inventory (BFI). Exploratory and confirmatory factor analysis of the items uncovered eight facets:…

MacCann, Carolyn; Duckworth, Angela Lee; Roberts, Richard D.

2009-01-01

144

Morphological Traits Around Patellofemoral Joint in Indian Femora and their Implications  

PubMed Central

Introduction: Knowledge of structural variations around patellofemoral joint has helped to understand postural behavior patterns of various population groups. The biomechanical impact of postures may lead to certain skeletal modifications which may contribute to knee pathologies like patellofemoral arthritis, patellar subluxation and trochlear dysplasia. This study was conducted to report the incidence of skeletal non-metric markers on femur in Indian population and to understand their correlation with some pathologies of patellofemoral joint. The traits studied were Martin’s facet, Peritrochlear groove and Supratrochlear facet. Materials and Methods: The study material was a collection of 152 adult femora from osteology museum in Department of Anatomy, Maulana Azad Medical College, New Delhi, India, with equal percentage of bones from each side and gender. All bones were evaluated for the above mentioned traits and results were obtained as percentage of incidence and Chi-Square test using SPSS version 17. Results: The data showed that Martin’s facet and Peritrochlear groove showed a higher occurrence in male femora. However, Supratrochlear facet was more commonly found in female bones. Martin’s facet had an equal incidence on femora of each side while peritrochlear groove and supratrochlear facet had higher percentage of occurrence on right side. Supratrochlear facet revealed significant side variation. Conclusion: These data suggest that casual or occupational postures may impose structural adaptations around patell- ofemoral joint. The stress of these postures may have causal,consequential or co-incidental relationship with joint pathologies. The gender, special occupations like sports and genetic predisposition may possibly have a role to play. PMID:25302179

Ghosh, Suchismita; Vasudeva, Neelam

2014-01-01

145

Synovial cyst of a lumbar facet joint: a rare cause of back pain and sciatica  

Microsoft Academic Search

Les kystes synoviaux intrarachidiens sont des lésions peu communes qui peuvent se traduire par des lombalgies aiguës ou chroniques associées ou non à des signes radiculaires. Nous présentons deux cas de lombalgies associées à des signes radiculaires, dont la cause était une pathologie inhabituelle représentée par un kyste synoval intrarachidien.

R. A. Marston; M. Burwell; T. B. McAuliffe; A. J. Kellerman

1993-01-01

146

Development and Validation of a Synthetic Lumbar Facet Joint and its Load Bearing Characteristics  

E-print Network

, or other types of spacers. This procedure is commonly used to alleviate LBP cause by vertebral fractures, deformities, and DD. Although spinal fusion has been widely used for years, it has a Page | 3 high risk of failure. Turner et al. report failure... to restore is shape and structure. These procedures are commonly used to address LBP associated with osteoporosis and vertebral fractures. Both of these procedures have relatively short surgical times, and little to no healing time. However...

Mar, Damon

2011-12-31

147

Stabilization of the sacroiliac joint.  

PubMed

Lower back pain and pain involving the area of the posterior iliac spine are extremely common. Degeneration of the sacroiliac joint (SIJ) is one potential cause for lower back pain and pain radiating into the groin or buttocks. Degenerative changes to the lumbar spine and sacroiliac joints are common. A recent study evaluating SIJ abnormalities in a primary low back pain population demonstrated 31.7% of patients demonstrated SI joint abnormalities. (4) As is the case for the evaluation and management of isolated lower back pain, the evaluation, management, and role for surgical intervention in SIJ pain is very controversial. Many patients have degenerative changes of the disc, facet joints, and SIJs. A recent systematic review performed to determine the diagnostic accuracy of tests available to clinicians to identify the disc, facet joint, or SIJ as the source of low back pain concluded that tests do exist that change the probability of the disc or SIJ (but not the facet joint) as the source of low back pain. (3) It was also concluded that the usefulness of these tests in clinical practice, particularly for guiding treatment selection, remains unclear. (3) Although there is general agreement that SIJ pathological changes are a potential cause of pain, there is far less agreement about the optimal management of these conditions. A variety of conditions can cause SIJ dysfunction including degenerative and inflammatory arthritis, trauma, prior lumbosacral fusion, hip arthritis, limb length inequality, infections, and neoplasia. (8) There is increasing evidence that image intensifier-guided single periarticular injection can correctly localize pain to the SIJ but the optimal management strategy remains controversial. Recent publications have compared surgical versus injection treatments and fusion versus denervation procedures. (1 , 8) A systematic review found improvement regardless of the treatment, with most studies reporting over 40% improvement in pain as measured by VAS or NRS scores. (8) It cautioned that one of the studies reported 17.6% of patients experiencing mild/no pain compared with 82.4% experiencing marked/severe pain at 39 months after SIJ fusion procedures. (6 , 8) This systematic review also noted that despite improvements in reported pain, less than half of patients who had work status reported as returning to work. (8) Because of the functional and socioeconomic consequences of chronic lower back pain, numerous surgical treatments to improve this condition have been attempted by spinal surgeons through the years. Arthrodesis of the SIJ is a surgical procedure with a long history dating to the beginnings of spinal surgery. (7) Poor results, high complication rates and the need for additional surgical procedures have generally diminished the enthusiasm for this procedure until recently. (6) A variety of "minimally invasive" procedures have been recently introduced that have rekindled enthusiasm for the surgical management of SIJ pathology. The technique demonstrated in the "Stabilization of the SIJ with SI-Bone" is one of these new techniques. There has been a recent publication detailing the very short term clinical outcomes with this technique that reported encouraging results. (5) In this series of 50 patients, quality of life questionnaires were available for 49 patients preoperatively, 41 patients at 3 months, 40 at 6 months and only 27 at 12 months, complicating the ability to accurately assess true outcomes. Although the focus of this video by Geisler is on the surgical technique, there should have been more information provided on the expected surgical outcomes and potential complications of SIJ fusion. (2) The video only gives minimal information on how to appropriately select patients with potential SIJ pathology for surgical intervention. There are insufficient recommendations on the clinical and radiographic follow-up needed for this procedure. A concern with this implant is whether the porous plasma spray coating on the implant actually results in bone growth across the SIJ

Shaffrey, Christopher I; Smith, Justin S

2013-07-01

148

Low index faceting of Pt nanostructures on oxide surface with potential application for fuel cells  

Microsoft Academic Search

Anneal induced faceting of platinum (Pt) thin film is being studied by atomic force microscopy. We find that at 700 °C faceting occurs by first forming percolation clusters. The nanodots form low index facets with the substrate and with various geometric shapes parallel to the substrate. Time dependent coarsening kinetics shows Lifsitz-Slyozov\\/Wagner type diffusion therefore indicating Oswald ripening. Low index

Deeder Aurongzeb

2007-01-01

149

Faceted Taxonomy-based Information Management Yannis Tzitzikas1,2  

E-print Network

Faceted Taxonomy-based Information Management Yannis Tzitzikas1,2 and Anastasia Analyti2 1 of managing (faceted) taxonomy-based in- formation sources. Specifically, we discuss (i) the seman- tic description of faceted taxonomies, based on the Com- pound Term Composition Algebra (CTCA), (ii) the revision

Analyti, Anastasia

150

Coarsening of Faceted Crystals Gregory S. Rohrer,* C. Lane Rohrer, and William W. Mullins  

E-print Network

. Our assumption of a fully faceted form implies that for a crystal to change size while retaining itsCoarsening of Faceted Crystals Gregory S. Rohrer,* C. Lane Rohrer, and William W. Mullins-3890 The influence of the nucleation energy barrier on the capillary- driven coarsening of faceted crystals

Rohrer, Gregory S.

151

Using facet-based assessment to understand introductory programming students knowledge  

Microsoft Academic Search

Knowing what students understand is crucial for making teaching decisions. Our goal was to explore the potential of using facet-based assessment in engineering education. We wanted to see what the process of developing, verifying, and implementing facet-based assessment would look like. For our investigation, we chose a concept covered early in introductory programming, variables. After identifying potential facets we designed

Lori Postner; Jennifer Turns

2002-01-01

152

Subtalar joint stress imaging with tomosynthesis.  

PubMed

The purpose of this study was to perform stress imaging of hindfoot inversion and eversion using tomosynthesis and to assess the subtalar joint range of motion (ROM) of healthy subjects. The subjects were 15 healthy volunteers with a mean age of 29.1 years. Coronal tomosynthesis stress imaging of the subtalar joint was performed in a total of 30 left and right ankles. A Telos stress device was used for the stress load, and the load was 150 N for both inversion and eversion. Tomographic images in which the posterior talocalcaneal joint could be confirmed on the neutral position images were used in measurements. The angle of the intersection formed by a line through the lateral articular facet of the posterior talocalcaneal joint and a line through the surface of the trochlea of the talus was measured. The mean change in the angle of the calcaneus with respect to the talus was 10.3 ± 4.8° with inversion stress and 5.0 ± 3.8° with eversion stress from the neutral position. The result was a clearer depiction of the subtalar joint, and inversion and eversion ROM of the subtalar joint was shown to be about 15° in healthy subjects. Levels of Evidence: Diagnostic, Level IV. PMID:24686905

Teramoto, Atsushi; Watanabe, Kota; Takashima, Hiroyuki; Yamashita, Toshihiko

2014-06-01

153

Joint hypermobility  

Microsoft Academic Search

Joint hypermobility is an area of neglect in rheumatology. That is not to say it is overlooked by rheumatologists. It is spotted when sought, but for many unfortunate patients, here the story ends. The act of recognition becomes the goal in itself rather than the medium through which effective therapy can be provided. This chapter serves to reinforce the clinical

Rodney Grahame

2003-01-01

154

How Many Facets are Needed to Represent the Surface Energy Balance of an Urban Area?  

NASA Astrophysics Data System (ADS)

We investigate the question of how many facets are needed to represent the energy balance of an urban area by developing simplified 3-, 2- and 1-facet versions of a 4-facet energy balance model of two-dimensional streets and buildings. The 3-facet model simplifies the 4-facet model by averaging over the canyon orientation, which results in similar net shortwave and longwave balances for both wall facets, but maintains the asymmetry in the heat fluxes within the street canyon. For the 2-facet model, on the assumption that the wall and road temperatures are equal, the road and wall facets can be combined mathematically into a single street-canyon facet with effective values of the heat transfer coefficient, albedo, emissivity and thermodynamic properties, without further approximation. The 1-facet model requires the additional assumption that the roof temperature is also equal to the road and wall temperatures. Idealised simulations show that the geometry and material properties of the walls and road lead to a large heat capacity of the combined street canyon, whereas the roof behaves like a flat surface with low heat capacity. This means that the magnitude of the diurnal temperature variation of the street-canyon facets are broadly similar and much smaller than the diurnal temperature variation of the roof facets. Consequently, the approximation that the street-canyon facets have similar temperatures is sound, and the road and walls can be combined into a single facet. The roof behaves very differently and a separate roof facet is required. Consequently, the 2-facet model performs similarly to the 4-facet model, while the 1-facet model does not. The models are compared with previously published observations collected in Mexico City. Although the 3- and 2-facet models perform better than the 1-facet model, the present models are unable to represent the phase of the sensible heat flux. This result is consistent with previous model comparisons, and we argue that this feature of the data cannot be produced by a single column model. We conclude that a 2-facet model is necessary, and for numerical weather prediction sufficient, to model an urban surface, and that this conclusion is robust and therefore applicable to more general geometries.

Porson, Aurore; Harman, Ian N.; Bohnenstengel, Sylvia I.; Belcher, Stephen E.

2009-07-01

155

Elbow arthroscopy for posttraumatic arthrosis.  

PubMed

Posttraumatic stiffness is a common complication after injury to the elbow. The loss of motion may significantly limit an individual's ability to perform normal activities of daily living. If conservative measures including medication, physical therapy, static splinting, and selective injection fail to restore functional range of motion, surgical intervention may be warranted. Open procedures have been described with reasonable success in restoring motion. However, arthroscopic techniques may provide several advantages in these patients who have often undergone previous extensive open surgery. PMID:19385556

Geib, Timothy M; Savoie, Felix H

2009-01-01

156

Recurrent gallstone ileus: beware of the faceted stone.  

PubMed

A 73-year-old man with gallstone disease was admitted with right upper quadrant abdominal pain. He was treated for cholecystitis with intravenous antibiotics. Two days later, he reported of new onset left iliac fossa pain, with tenderness and guarding. An abdominal X-ray demonstrated small bowel obstruction, a CT scan demonstrated an impacted gallstone within the proximal ileum. He was treated for a gallstone ileum and underwent an uncomplicated laparotomy, small bowel enterotomy and removal of a faceted gallstone. Three months later, the patient re-presented with generalised abdominal pain, guarding and rebound tenderness. Small bowel obstruction was again demonstrated with an impacted gallstone within the distal ileum seen on CT scan. A second laparotomy revealed two further faceted gallstones, which were removed through an enterotomy. The densely adherent gallbladder to the duodenum precluded a surgical repair of the cholecystoduodenal fistula. He made an uneventful recovery and was subsequently discharged home. PMID:25391822

Gandamihardja, Tasha A K; Kibria, Shah M G

2014-01-01

157

Numerical computations of facetted pattern formation in snow crystal growth  

E-print Network

Facetted growth of snow crystals leads to a rich diversity of forms, and exhibits a remarkable sixfold symmetry. Snow crystal structures result from diffusion limited crystal growth in the presence of anisotropic surface energy and anisotropic attachment kinetics. It is by now well understood that the morphological stability of ice crystals strongly depends on supersaturation, crystal size and temperature. Until very recently it was very difficult to perform numerical simulations of this highly anisotropic crystal growth. In particular, obtaining facet growth in combination with dendritic branching is a challenging task. We present numerical simulations of snow crystal growth in two and three space dimensions using a new computational method recently introduced by the authors. We present both qualitative and quantitative computations. In particular, a linear relationship between tip velocity and supersaturation is observed. The computations also suggest that surface energy effects, although small, have a larg...

Barrett, John W; Nürnberg, Robert

2012-01-01

158

Lumbar facet stress fracture in a ballet dancer.  

PubMed

A frequent cause of back pain in athletes and dancers is stress injury to the posterior vertebral elements. Stress fractures affect the pars interarticularis and, rarely, other vertebral regions. The authors present their experience with the diagnosis and treatment of a fourth lumbar inferior articular facet stress fracture in a ballerina in this brief report and discuss the literature concerning posterior element stress fractures. PMID:8303462

Fehlandt, A F; Micheli, L J

1993-12-01

159

Joint Replacement (Finger and Wrist Joints)  

MedlinePLUS

... A-Z Hand Anatomy Find a Hand Surgeon Joint Replacement Email to a friend * required fields From * To * ... be possible to treat arthritic joints surgically, including “joint replacement” procedures. What does it mean to have a “ ...

160

Framework Application for Core Edge Transport Simulation (FACETS)  

SciTech Connect

The FACETS (Framework Application for Core-Edge Transport Simulations) project of Scientific Discovery through Advanced Computing (SciDAC) Program was aimed at providing a high-fidelity whole-tokamak modeling for the U.S. magnetic fusion energy program and ITER through coupling separate components for each of the core region, edge region, and wall, with realistic plasma particles and power sources and turbulent transport simulation. The project also aimed at developing advanced numerical algorithms, efficient implicit coupling methods, and software tools utilizing the leadership class computing facilities under Advanced Scientific Computing Research (ASCR). The FACETS project was conducted by a multi-discipline, multi-institutional teams, the Lead PI was J.R. Cary (Tech-X Corp.). In the FACETS project, the Applied Plasma Theory Group at the MAE Department of UCSD developed the Wall and Plasma-Surface Interaction (WALLPSI) module, performed its validation against experimental data, and integrated it into the developed framework. WALLPSI is a one-dimensional, coarse grained, reaction/advection/diffusion code applied to each material boundary cell in the common modeling domain for a tokamak. It incorporates an advanced model for plasma particle transport and retention in the solid matter of plasma facing components, simulation of plasma heat power load handling, calculation of erosion/deposition, and simulation of synergistic effects in strong plasma-wall coupling.

Krasheninnikov, Sergei; Pigarov, Alexander

2011-10-15

161

Joint hypermobility.  

PubMed

Joint hypermobility is an area of neglect in rheumatology. That is not to say it is overlooked by rheumatologists. It is spotted when sought, but for many unfortunate patients, here the story ends. The act of recognition becomes the goal in itself rather than the medium through which effective therapy can be provided. This chapter serves to reinforce the clinical and epidemiological importance of a common disorder whose significance is under-appreciated and impact largely ignored. In contradistinction to our earlier chapter, published in 2000, which took for its remit the heritable disorders of connective tissue in general, the current one focuses on the commonly encountered (so-called benign) joint hypermobility syndrome, its recognition, epidemiology, clinical features and management according to the most recent literature. PMID:15123047

Hakim, Alan; Grahame, Rodney

2003-12-01

162

Simulated Whiplash Modulates Expression of the Glutamatergic System in the Spinal Cord Suggesting Spinal Plasticity Is Associated with Painful Dynamic Cervical Facet Loading  

PubMed Central

Abstract The cervical facet joint and its capsule have been reported to be injured during whiplash scenarios and are a common source of chronic neck pain from whiplash. Both the metabotropic glutamate receptor 5 (mGluR5) and the excitatory amino acid carrier 1 (EAAC1) have pivotal roles in chronic pain. In this study, spinal mGluR5 and EAAC1 were quantified following painful facet joint distraction in a rat model of facet-mediated painful loading and were evaluated for their correlation with the severity of capsule loading. Rats underwent either a dynamic C6/C7 joint distraction simulating loading experienced during whiplash (distraction; n?=?12) or no distraction (sham; n?=?6) to serve as control. The severity of capsular loading was quantified using strain metrics, and mechanical allodynia was assessed after surgery. Spinal cord tissue was harvested at day 7 and the expression of mGluR5 and EAAC1 were quantified using Western blot analysis. Mechanical allodynia following distraction was significantly (p?joint loading; chronic whiplash pain may be alleviated by blocking mGluR5 expression and/or enhancing glutamate transport through the neuronal transporter EAAC1. PMID:19772459

Dong, Ling

2010-01-01

163

Joint-preserving osteotomy for malunited intra-articular calcaneal fractures.  

PubMed

Displaced intra-articular fractures of the calcaneus can lead to severe pain and disability if not treated appropriately. Failure to treat may require fusion of the subtalar joint, supplemented by additional osteotomies. Occasionally, these fractures are seen after the fracture has just healed, and the decision to treat can be a difficult one. Over the course of 10 years, 5 patients were treated with a corrective osteotomy along the primary fracture line, joint realignment, soft tissue balancing, and secondary internal fixation at a mean of 2.9 months after the injury. At a mean of 4.1 years (range, 2-10 years), all patients were satisfied with their result. Two patients underwent implant removal and subtalar arthrolysis 1 year after correction. No secondary fusions were required. The mean American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot score improved significantly from 19.0 preoperatively to 81.2 at follow-up (P < 0.001). The radiographic parameters (the Böhler angle, talocalcaneal height, and heel width) were substantially corrected. A joint-preserving osteotomy with axial realignment can be a treatment option for malunited intra-articular calcaneal fractures encountered early on, before the development of subtalar arthrosis. PMID:23515121

Rammelt, Stefan; Grass, René; Zwipp, Hans

2013-10-01

164

Sub-Facet Heterogeneity of the Urban Surface Energy Budget  

NASA Astrophysics Data System (ADS)

The Princeton Urban Canopy Model (PUCM) and observational data are combined to understand the influence of urban sub-facet heterogeneity, and the associated influence of material properties, on the urban surface energy budget. This heterogeneity is related to the different surfaces and materials (asphalt, concrete, grass, black roofs, green roofs, etc.) that are typically found within one urban facet (roof, wall, and ground). Of particular interest is the role of water storage and evaporation from urban surfaces in modulating the energy budget. The PUCM is evaluated at sites of various urban densities. Subsequently, one densely-built site is selected for in-depth analysis and the model is applied, with sub-facet resolution, to simulate the water and energy budgets. Our analyses show that while all built surfaces convert most of the incoming energy into sensible rather than latent heat, sensible heat fluxes from asphalt and non-reflective rooftops are twice as high as those from concrete surfaces and light colored roofs. Another important and commonly observed characteristic of urban areas- the shift in peak time of sensible heat compared to rural areas, is shown to be mainly linked to concrete's high heat storage capacity. Our results also indicate that while evaporation from built surfaces is discontinuous and intermittent, overall, these surfaces accounted for nearly 16% of latent heat fluxes (LE) at the study site during the study period. More importantly, this contribution is mainly concentrated during the 48 hours following a rain event and thus its accurate representation is critical to our understanding of the urban surface energy budget during wet periods.

Ramamurthy, P.; Bou-Zeid, E.; Smith, J. A.; Baeck, M. L.; Welty, C.

2013-12-01

165

Singular orientations and faceted motion of dislocations in body-centered cubic crystals  

PubMed Central

Dislocation mobility is a fundamental material property that controls strength and ductility of crystals. An important measure of dislocation mobility is its Peierls stress, i.e., the minimal stress required to move a dislocation at zero temperature. Here we report that, in the body-centered cubic metal tantalum, the Peierls stress as a function of dislocation orientation exhibits fine structure with several singular orientations of high Peierls stress—stress spikes—surrounded by vicinal plateau regions. While the classical Peierls-Nabarro model captures the high Peierls stress of singular orientations, an extension that allows dislocations to bend is necessary to account for the plateau regions. Our results clarify the notion of dislocation kinks as meaningful only for orientations within the plateau regions vicinal to the Peierls stress spikes. These observations lead us to propose a Read-Shockley type classification of dislocation orientations into three distinct classes—special, vicinal, and general—with respect to their Peierls stress and motion mechanisms. We predict that dislocation loops expanding under stress at sufficiently low temperatures, should develop well defined facets corresponding to two special orientations of highest Peierls stress, the screw and the M111 orientations, both moving by kink mechanism. We propose that both the screw and the M111 dislocations are jointly responsible for the yield behavior of BCC metals at low temperatures. PMID:22949701

Kang, Keonwook; Bulatov, Vasily V.; Cai, Wei

2012-01-01

166

Singular orientations and faceted motion of dislocations in body-centered cubic crystals.  

PubMed

Dislocation mobility is a fundamental material property that controls strength and ductility of crystals. An important measure of dislocation mobility is its Peierls stress, i.e., the minimal stress required to move a dislocation at zero temperature. Here we report that, in the body-centered cubic metal tantalum, the Peierls stress as a function of dislocation orientation exhibits fine structure with several singular orientations of high Peierls stress-stress spikes-surrounded by vicinal plateau regions. While the classical Peierls-Nabarro model captures the high Peierls stress of singular orientations, an extension that allows dislocations to bend is necessary to account for the plateau regions. Our results clarify the notion of dislocation kinks as meaningful only for orientations within the plateau regions vicinal to the Peierls stress spikes. These observations lead us to propose a Read-Shockley type classification of dislocation orientations into three distinct classes-special, vicinal, and general-with respect to their Peierls stress and motion mechanisms. We predict that dislocation loops expanding under stress at sufficiently low temperatures, should develop well defined facets corresponding to two special orientations of highest Peierls stress, the screw and the M111 orientations, both moving by kink mechanism. We propose that both the screw and the M111 dislocations are jointly responsible for the yield behavior of BCC metals at low temperatures. PMID:22949701

Kang, Keonwook; Bulatov, Vasily V; Cai, Wei

2012-09-18

167

Personality disorders and the five-factor model: a test of facet-level predictions.  

PubMed

We tested predicted relationships (Widiger, 1993; Widiger, Trull, Clarkin, Sanderson, & Costa, 1994) between personality disorder scores and facets of the five-factor model, and evaluated the relative benefits of facet-level analyses over domain-level analyses. Data from 614 undergraduates indicated: (a) 63% of the predicted facet relationships were significant, although many unpredicted relationships also emerged; (b) facet-level analyses did not yield substantially stronger effect sizes than domain-level analyses; but (c) facet-level analyses provided much better discrimination between personality disorders than domain-level analyses. Facets of the openness to experience domain also helped discriminate between personality disorders, which is in contrast to previous domain-level findings that openness is not important. PMID:9573518

Dyce, J A; O'Connor, B P

1998-01-01

168

Joint Sealants for Horizontal Pavement Joints—Specifically Bridge Joints  

Microsoft Academic Search

The various types of materials that have been used to seal bridge joints have been reviewed. Some of the bridge engineers joint material requirements have been listed together with the advantages and disadvantages of the three most widely used bridge joint sealants being specified and used today. It is felt that the cold applied two component asphalt-modified polyurethane sealants come

Thomas J. Green

1969-01-01

169

Multiscale facet model for infrared small target detection  

NASA Astrophysics Data System (ADS)

In this paper, we proposed a new robust infrared small target detector that is more suitable for complex background with low signal-to-clutter ratio. The original image is decomposed into sub-bands in different orientations by using the directional second-order directional derivative (DSODD) filters deduced from the facet model. The multiscale facet model (MFM) analysis is developed by using a series of multiscale DSODD filters, which are obtained by filling zeros in the basic DSODD filter. Based on MFM, an MFM matrix is constructed, and the normalized determinant of this matrix is then defined as the target measure. The corresponding multiscale correlations of the target measures are computed to enhance the target signal and suppressing the background clutter. The experimental results on a set of real infrared images demonstrate that the proposed approach is effective and is superior to the traditional small target detection methods in terms of the pertained quantitative detection evaluation indexes, such as the signal-to-clutter ratio gain and the background suppression factor.

Yang, Changcai; Ma, Jiayi; Zhang, Meifang; Zheng, Sheng; Tian, Xin

2014-11-01

170

Intensity Effects of the FACET Beam in the SLAC Linac  

SciTech Connect

The beam for FACET (Facility for Advanced aCcelerator Experimental Tests) at SLAC requires an energy-time correlation ('chirp') along the linac, so it can be compressed in two chicanes, one at the midpoint in sector 10 and one W-shaped chicane just before the FACET experimental area. The induced correlation has the opposite sign to the typical used for BNS damping, and therefore any orbit variations away from the center kick the tail of the beam more than the head, causing a shear in the beam and emittance growth. Any dispersion created along the linac has similar effects due to the high (>1.2% rms) energy spread necessary for compression. The initial huge emittances could be reduced by a factor of 10, but were still bigger than expected by a factor of 2-3. Normalized emittance of 3 {micro}m-rad in Sector 2 blew up to 150 {micro}m-rad in Sector 11 but could be reduced to about 6-12 {micro}m-rad, for the vertical plane although the results were not very stable. Investigating possible root causes for this, we found locations where up to 10 mm dispersion was created along the linac, which were finally verified with strong steering and up to 7 mm settling of the linac accelerator at these locations.

Decker, F.-J.; Lipkowitz, N.; Sheppard, J.; White, G.R.; Wienands, U.; Woodley, M.; Yocky, G.; /SLAC

2012-07-03

171

Comparing Linkage Designs Based on Land Facets to Linkage Designs Based on Focal Species  

PubMed Central

Least-cost modeling for focal species is the most widely used method for designing conservation corridors and linkages. However, these designs depend on today's land covers, which will be altered by climate change. We recently proposed an alternative approach based on land facets (recurring landscape units of relatively uniform topography and soils). The rationale is that corridors with high continuity of individual land facets will facilitate movement of species associated with each facet today and in the future. Conservation practitioners might like to know whether a linkage design based on land facets is likely to provide continuity of modeled breeding habitat for species needing connectivity today, and whether a linkage for focal species provides continuity and interspersion of land facets. To address these questions, we compared linkages designed for focal species and land facets in three landscapes in Arizona, USA. We used two variables to measure linkage utility, namely distances between patches of modeled breeding habitat for 5–16 focal species in each linkage, and resistance profiles for focal species and land facets between patches connected by the linkage. Compared to focal species designs, linkage designs based on land facets provided as much or more modeled habitat connectivity for 25 of 28 species-landscape combinations, failing only for the three species with the most narrowly distributed habitat. Compared to land facets designs, focal species linkages provided lower connectivity for about half the land facets in two landscapes. In areas where a focal species approach to linkage design is not possible, our results suggest that conservation practitioners may be able to implement a land facets approach with some confidence that the linkage design would serve most potential focal species. In areas where focal species designs are possible, we recommend using the land facet approach to complement, rather than replace, focal species approaches. PMID:23152831

Brost, Brian M.; Beier, Paul

2012-01-01

172

The hamate facet of the lunate: a radiographic study in an Arab population from Bahrain  

Microsoft Academic Search

Based on the presence of a facet for the hamate two types of lunate bone have been described in the wrist; type I is without\\u000a a facet for the hamate while type II bears a facet on the medial surface for articulation with the proximal pole of the hamate.\\u000a Compared to type I lunates, type II lunates have been shown

A. S. Dharap; H. Al-Hashimi; S. Kassab; M. F. Abu-Hijleh

2006-01-01

173

Validation of crystallographic correlation for faceted morphology in laser surface engineered alumina ceramic  

SciTech Connect

Surface modification of alumina ceramic using a high energy density continuous wave laser beam is associated with the formation of highly faceted pyramidal surface grains. Recently, we developed a phenomenological model explaining the faceted morphology by a fiber texture with a strong (1-210) component. Based on high resolution electron back-scattered diffraction, the present work proposes a more precise model showing that faceting of surface grains is closely linked with the evolution of a strong (2-310) fiber texture.

Harimkar, Sandip P [ORNL; Daniel, Claus [ORNL; Holzapfel, Christian [Saarland University, Saarbrucken, Germany; Leibenguth, Peter [Saarland University, Saarbrucken, Germany; M?cklich, Frank [Saarland University, Saarbrucken, Germany; Dahotre, Narendra B [ORNL

2007-01-01

174

GaN-based LEDs with Al-deposited V-shaped sapphire facet mirror  

Microsoft Academic Search

A GaN-based light-emitting diodes (LEDs) with V-shaped sapphire facet reflector was fabricated using the double transferred scheme and sapphire chemical wet etching. The {1-102} R-plane V-shaped facet reflector with a 57° against {0001} C-axis has the superior capability for enhancing the light extraction efficiency. The light output power of the V-shaped sapphire facet reflector LED was 1.4 times higher than

Y. J. Lee; J. M. Hwang; T. C. Hsu; M. H. Hsieh; M. J. Jou; B. J. Lee; T. C. Lu; H. C. Kuo; S. C. Wang

2006-01-01

175

Nanoscale anatase TiO2 with dominant {1 1 1} facets shows high photocatalytic activity  

NASA Astrophysics Data System (ADS)

In this work, we report a novel synthesis of nanoscale anatase TiO2 with dominant highly active {1 1 1} facets by a simple one-step hydrothermal route with the assistance of NH4F and HF. In this progress, the exposed crystal facets of TiO2 can been directly tuned by controlling the mole ratio of NH4+ and F-. When the mole ratio of NH4+ and F-reach 1:2, nanoscale anatase TiO2 with dominant {1 1 1} facets can be obtained. Nanoscale anatase TiO2 with exposed {1 0 1} or {0 0 1} facets will be prepared when there is only ammonia or HF added respectively. Such nano-TiO2 with exposed highly active {1 1 1} facets has large specific surface area and shows excellent photocatalytic activity: as much as 2-3 times than that of TiO2 nanosheets with exposed {0 0 1} facets and commercial Degussa P25 which confirms the {1 1 1} facets have higher photocatalytic activity than {0 0 1} and {1 0 1} facets. The higher photocatalytic activity of {1 1 1} facets can be ascribed to the fact that all Ti and O atoms on the surface are unsaturated Ti5c, Ti3c and O2c modes which produces a higher adsorption and degradation ability. The present work demonstrates a explore of hydrothermal synthetic method for controlling preparation of nano-materials.

Zhang, Jun; Qian, Lisha; Yang, Lingxia; Tao, Xi; Su, Kunpeng; Wang, Hongbo; Xi, Junhua; Ji, Zhenguo

2014-08-01

176

FACET: an object-oriented software framework for modeling complex social behavior patterns  

SciTech Connect

The Framework for Addressing Cooperative Extended Transactions (FACET) is a flexible, object-oriented architecture for implementing models of dynamic behavior of multiple individuals, or agents, in a simulation. These agents can be human (individuals or organizations) or animal and may exhibit any type of organized social behavior that can be logically articulated. FACET was developed by Argonne National Laboratory's (ANL) Decision and Information Sciences Division (DIS) out of the need to integrate societal processes into natural system simulations. The FACET architecture includes generic software components that provide the agents with various mechanisms for interaction, such as step sequencing and logic, resource management, conflict resolution, and preemptive event handling. FACET components provide a rich environment within which patterns of behavior can be captured in a highly expressive manner. Interactions among agents in FACET are represented by Course of Action (COA) object-based models. Each COA contains a directed graph of individual actions, which represents any known pattern of social behavior. The agents' behavior in a FACET COA, in turn, influences the natural landscape objects in a simulation (i.e., vegetation, soil, and habitat) by updating their states. The modular design of the FACET architecture provides the flexibility to create multiple and varied simulation scenarios by changing social behavior patterns, without disrupting the natural process models. This paper describes the FACET architecture and presents several examples of FACET models that have been developed to assess the effects of anthropogenic influences on the dynamics of the natural environment.

Dolph, J. E.; Christiansen, J. H.; Sydelko, P. J.

2000-06-30

177

Aerodynamics Investigation of Faceted Airfoils at Low Reynolds Number  

NASA Astrophysics Data System (ADS)

The desire and demand to fly farther and faster has progressively integrated the concept of optimization with airfoil design, resulting in increasingly complex numerical tools pursuing efficiency often at diminishing returns; while the costs and difficulty associated with fabrication increases with design complexity. Such efficiencies may often be necessary due to the power density limitations of certain aircraft such as small unmanned aerial vehicles (UAVs) and micro air vehicles (MAVs). This research, however, focuses on reducing the complexity of airfoils for applications where aerodynamic performance is less important than the efficiency of manufacturing; in this case a Hybrid Projectile. By employing faceted sections to approximate traditional contoured wing sections it may be possible to expedite manufacturing and reduce costs. We applied this method to the development of a low Reynolds number, disposable Hybrid Projectile requiring a 4.5:1 glide ratio, resulting in a series of airfoils which are geometric approximations to highly contoured cross-sections called ShopFoils. This series of airfoils both numerically and experimentally perform within a 10% margin of the SD6060 airfoil at low Re. Additionally, flow visualization has been conducted to qualitatively determine what mechanisms, if any, are responsible for the similarity in performance between the faceted ShopFoil sections and the SD6060. The data obtained by these experiments did not conclusively reveal how the faceted surfaces may influence low Re flow but did indicate that the ShopFoil s did not maintain flow attachment at higher angles of attack than the SD6060. Two reasons are provided for the unexpected performance of the ShopFoil: one is related to downwash effects, which are suspected of placing the outer portion of the span at an effective angle of attack where the ShopFoils outperform the SD6060; the other is the influence of the tip vortex on separation near the wing tips, which possibly provides a 'comparative advantage' to the ShopFoil because it has more to gain from a reduction in its pressure drag component.

Napolillo, Zachary G.

178

On the convergence between PSY-5 domains and PID-5 domains and facets: implications for assessment of DSM-5 personality traits.  

PubMed

The DSM-5 Personality and Personality Disorders workgroup and their consultants have developed the 220-item, self-report Personality Inventory for the DSM-5 (PID-5) for direct assessment of the proposed personality trait system for DSM-5; however, most practicing clinical psychologists will likely continue to rely on separate omnibus measures to index symptoms and traits associated with psychopathology. The Minnesota Multiphasic Personality Inventory-2 Restructured Form (MMPI-2-RF) is one such measure and assesses the Personality Psychopathology Five (PSY-5) domains, which are conceptual cognates of the DSM-5 trait domains. The current study examined the associations between the MMPI-2-RF PSY-5 scales and the DSM-5 trait domains and facets indexed by the PID-5. A clear pattern of convergence was found indicating that each of the PSY-5 scales was most highly correlated with its conceptually expected PID-5 counterpart (rs = .44-.67; Mdn r = .53) and facet correlations generally showed the same pattern. Similarly, when each of the PSY-5 scales was regressed onto the PID-5 domains, the conceptually expected pattern of associations emerged even more clearly. Finally, a joint exploratory factor analysis with the PSY-5 and PID-5 trait facet scales indicated a five-factor solution that clearly resembled both of the PSY-5/DSM-5 trait domains. These results show clear evidence that the MMPI-2-RF has utility in the assessment of dimensional personality traits proposed for the upcoming DSM-5. PMID:23297369

Anderson, Jaime L; Sellbom, Martin; Bagby, R Michael; Quilty, Lena C; Veltri, Carlo O C; Markon, Kristian E; Krueger, Robert F

2013-06-01

179

Spacesuit mobility joints  

NASA Technical Reports Server (NTRS)

Joints for use in interconnecting adjacent segments of an hermetically sealed spacesuit which have low torques, low leakage and a high degree of reliability are described. Each of the joints is a special purpose joint characterized by substantially constant volume and low torque characteristics. Linkages which restrain the joint from longitudinal distension and a flexible, substantially impermeable diaphragm of tubular configuration spanning the distance between pivotally supported annuli are featured. The diaphragms of selected joints include rolling convolutions for balancing the joints, while various joints include wedge-shaped sections which enhance the range of motion for the joints.

Vykukal, H. C. (inventor)

1978-01-01

180

Spacesuit mobility knee joints  

NASA Technical Reports Server (NTRS)

Pressure suit mobility joints are for use in interconnecting adjacent segments of an hermetically sealed spacesuit in which low torques, low leakage and a high degree of reliability are required. Each of the joints is a special purpose joint characterized by substantially constant volume and low torque characteristics and includes linkages which restrain the joint from longitudinal distension and includes a flexible, substantially impermeable diaphragm of tubular configuration spanning the distance between pivotally supported annuli. The diaphragms of selected joints include rolling convolutions for balancing the joints, while various joints include wedge-shaped sections which enhance the range of motion for the joints.

Vykukal, H. C. (inventor)

1979-01-01

181

Spatiotemporal growth of faceted and curved single crystals  

PubMed

The spatiotemporal growth of single crystals in a crystalline polymer has been investigated theoretically based on a nonconserved time dependent Ginzburg-Landau equation (known as TDGL model A). In the description of the total free energy, a double-well local free energy density signifying metastability of crystal ordering is combined with a nonlocal free energy term representing an interface gradient. The resulting nonlinear reaction diffusion equation after renormalization possesses a solitary wave property. Two-dimensional numerical calculations were performed to elucidate the faceted single crystal growth including square, rectangular, diamond-shaped, and curved single crystals. A three-dimensional simulation was also undertaken for the emergence of diamond-shaped single crystals in polyethylene. Of particular importance is that the model field parameters can be linked directly to the material parameters of polyethylene single crystals. Simulation with various elements of the interface gradient coefficient tensor captures various topologies of polymer single crystals. PMID:11088211

Kyu; Mehta; Chiu

2000-04-01

182

Giant photoluminescence emission in crystalline faceted Si grains  

PubMed Central

Empowering an indirect band-gap material like Si with optical functionalities, firstly light emission, represents a huge advancement constantly pursued in the realization of any integrated photonic device. We report the demonstration of giant photoluminescence (PL) emission by a newly synthesized material consisting of crystalline faceted Si grains (fg-Si), a hundred nanometer in size, assembled in a porous and columnar configuration, without any post processing. A laser beam with wavelength 632.8?nm locally produce such a high temperature, determined on layers of a given thickness by Raman spectra, to induce giant PL radiation emission. The optical gain reaches the highest value ever, 0.14?cm/W, representing an increase of 3 orders of magnitude with respect to comparable data recently obtained in nanocrystals. Giant emission has been obtained from fg-Si deposited either on glass or on flexible, low cost, polymeric substrate opening the possibility to fabricate new devices. PMID:24056300

Faraci, Giuseppe; Pennisi, Agata R.; Alberti, Alessandra; Ruggeri, Rosa; Mannino, Giovanni

2013-01-01

183

Etched facet and semiconductor\\/air DBR facet of a AlGaInP laser diode prepared by focused ion beam milling  

Microsoft Academic Search

The study of focused ion beam (FIB) milling for making etched facet and semiconductor\\/air distributed Bragg reflector (DBR) facets of AlGaInP-based red laser diodes (LD) is presented in this letter. For the Ga ion beam current of 100 pA at fixed accelerated voltage 30 kV, FIB milling rate of GaAs was found to be 0.46 ?m3\\/nC. As a trade-off between

Qian Ren; Bei Zhang; Jun Xu; ZhenSheng Zhang; YanBo Jin; Yi Qian; DaPeng Yu

2004-01-01

184

The associations between two facets of narcissism and eating disorder symptoms  

Microsoft Academic Search

The current study sought to examine the relationships between two facets of narcissism (vulnerable and grandiose) and eating disorder symptoms. Based upon previous research (Davis, Claridge, & Cerullo, 1997), it was predicted that the vulnerable narcissism facet would be more strongly associated with eating disorder symptoms because of the tendency for vulnerable narcissists to base their self-worth on their appearance

Kathryn H. Gordon; Joseph J. Dombeck

2010-01-01

185

Physically Derived Rules for Simulating Faceted Crystal Growth using Cellular Automata  

E-print Network

Physically Derived Rules for Simulating Faceted Crystal Growth using Cellular Automata Kenneth G derive a set of algorithms for simulating the diffusion-limited growth of faceted crystals using local to examine a novel morphological transition in the growth of thin plate-like crystals. 1. Introduction

Libbrecht, Kenneth G.

186

Faceted Taxonomy-based Information Management Yannis Tzitzikas1,2  

E-print Network

Faceted Taxonomy-based Information Management Yannis Tzitzikas1,2 and Anastasia Analyti2 1) taxonomy-based information sources. Specifically, we discuss (i) the semantic descrip- tion of faceted taxonomies, based on the Compound Term Composition Algebra (CTCA), (ii) the revision of CTCA ex- pressions

Tzitzikas, Yannis

187

An Efficient Slope-Deterministic Facet Model for SAR Imagery Simulation of Marine Scene  

Microsoft Academic Search

An efficient slope-deterministic facet model for the computation of the radar scattering cross section from electrically large sea surface is presented. As a facet-based theory, it is a more comprehensive model which can adequately reflect the specular and diffuse configurations, as well as the mono- and bistatic features. Significant computational efficiency and good agreement with experimental data are observed, which

Hui Chen; Min Zhang; Yan-Wei Zhao; Wei Luo

2010-01-01

188

Novel photocatalytic antibacterial activity of TiO2 microspheres exposing 100% reactive {111} facets.  

PubMed

TiO(2) microspheres constructed by well-crystallized faceted nanorods with high aspect ratios expose 100% photocatalytic reactive {111} facets on the spherical surface. The microspheres demonstrated excellent photocatalytic antibacterial activity towards Staphylococcus aureus due to effective suppression of photoinduced electron-hole pair recombination and active TiO(2)@?OH core-shell structure. PMID:22051605

Sun, Liang; Qin, Ying; Cao, Qingqing; Hu, Bingqing; Huang, Zhiwei; Ye, Ling; Tang, Xingfu

2011-12-21

189

Changes in Orientation of Attritional Wear Facets With Implications for Jaw Motion in a Mixed Longitudinal  

E-print Network

Changes in Orientation of Attritional Wear Facets With Implications for Jaw Motion in a Mixed Longitudinal Sample of Propithecus edwardsi From Ranomafana National Park, Madagascar Stephanie Blatch,1 * Doug-related changes in the shape of occluding teeth. Finally, the rate of decrease in wear facet verticality with age

Boyer, Doug M.

190

Optical characterization of the facets of a heliostat J. A. Avellaner  

E-print Network

169 Optical characterization of the facets of a heliostat J. A. Avellaner INITEC, Energia, Madrid the heliostat reflector panels (facets) of a central tower type solar power station from an optical point (1980) 169-173 FÃ?VRIER 1980, PAGE Classification Physics Abstracts 42.85 1. Introduction. - A solar

Paris-Sud XI, Université de

191

A LEVEL-SET METHOD FOR THE EVOLUTION OF FACETED GIOVANNI RUSSO AND PETER SMEREKA  

E-print Network

. For faceted crystals the curvature effects can be modeled by using crystalline curvature; for more details see is given to a good approximation by diamonds grown by chemical vapor deposition. The (111) and (100) planes, Jackson, and Elbaum devised a Lagrangian numerical method to evolve a faceted seed which gives the correct

Smereka, Peter

192

On the Facets of Mixed Integer Programs with Two Integer Variables and Two Constraints  

Microsoft Academic Search

In this paper we consider an infinite relaxation of the mixed integer linear program with two integer variables and two constraints, and we give a complete characterization of its facets. We then derive an analogous characterization of the facets of the underlying finite integer program.

Gérard Cornuéjols; François Margot

2008-01-01

193

Testing of the SAIC facets on the stretched-membrane dish  

SciTech Connect

A dish structure sized for a 25 kW electric dish/generator system has been installed at the National Solar Thermal Test Facility (NSTTF). The dish is used as an optical test bed for prototype stretched-membrane facets. Sandia procured twelve (12) stretched-membrane facets from Science Applications International Corporation (SAIC) for installation on the dish structure. Individual facet optical performance was measured using the 2f test method under development at Sandia. Four facets were tested on-sun using the test truss at the NSTTF prior to installation on the dish structure. During the final stages of the structure assembly, the facets were installed for testing. A distant light source alignment technique was used to align the facets to a 9 meter focal length. The alignment and focus were optimized with on-sun measurements of individual facet characteristics. On-sun flux maps of the image were made using the Beam Characterization System. Calorimetry tests were performed using a cold water calorimeter. This data was used to create a power intercept curve and predict the power inside apertures of different sizes. The focal plane was moved to 9.95 meters and the alignment, optimization, and on-sun tests repeated. This paper presents the results of the testing on the individual facets as well as the results of testing the dish system. The effects of the change in focal length on the optical performance of the dish are shown in the results.

Grossman, J.W.; Erdman, W.W.; Houser, R.M. [Sandia National Labs., Albuquerque, NM (United States); Davenport, R. [Science Applications International Corp., Golden, CO (United States)

1994-04-01

194

Facets of Career Satisfaction for Women Physicians in the United States: A Systematic Review  

Microsoft Academic Search

Background: Women make up a growing proportion of the physician workforce, and their career satisfaction may affect their health.Methods: We hypothesized many facets adversely affecting career satisfaction in women physicians were extrinsic, therefore, preventable or modifiable. We conducted a systematic review of the literature in English published through February 2010 to examine facets of career satisfaction of US women physicians.

Rabab Rizvi; Lindsay Raymer; Mark Kunik; Joslyn Fisher

2012-01-01

195

Polarization of transmission scattering simulated by using a multiple-facets model.  

PubMed

A Mueller matrix for scattering by a rough plane surface of a glass hemisphere was simulated by using a micro-facet model. The algorithms are formulated in vector representation in terms of the input and output directions. The single-facet scattering simulation used the results of the Kirchhoff integral for medium rough surfaces with exponential height distribution. Scatterings by two or more facets were also simulated. For a fixed angle between the incident and the detection directions, the transmission scattering and its polarization properties were symmetric when plotted against the off-specular incident angle. The single-facet model generated no depolarization or polarization change. When double-facet scattering was included, polarizations were changed appreciably while depolarization was still very small. Depolarization increased appreciably when scattering by higher orders was included. The simulated results that include all orders of scattering fit excellently to the measured scattering transmittance and its polarization and depolarization. PMID:15384429

Nee, Soe-Mie F; Nee, Tsu-Wei

2004-09-01

196

Measured and predicted root-mean-square errors in square and triangular antenna mesh facets  

NASA Technical Reports Server (NTRS)

Deflection shapes of square and equilateral triangular facets of two tricot-knit, gold plated molybdenum wire mesh antenna materials were measured and compared, on the basis of root mean square (rms) differences, with deflection shapes predicted by linear membrane theory, for several cases of biaxial mesh tension. The two mesh materials contained approximately 10 and 16 holes per linear inch, measured diagonally with respect to the course and wale directions. The deflection measurement system employed a non-contact eddy current proximity probe and an electromagnetic distance sensing probe in conjunction with a precision optical level. Despite experimental uncertainties, rms differences between measured and predicted deflection shapes suggest the following conclusions: that replacing flat antenna facets with facets conforming to parabolically curved structural members yields smaller rms surface error; that potential accuracy gains are greater for equilateral triangular facets than for square facets; and that linear membrane theory can be a useful tool in the design of tricot knit wire mesh antennas.

Fichter, W. B.

1989-01-01

197

ABSTRACT: The Prince William Sound (PWS) risk assessment was a joint project of Det Norske Veritas (DNV), Rensselaer Polytechnic  

E-print Network

risk assessment. The sys- tem simulation methodology is based on the premises that risk is a dynamic management. The use of dynamic simulation, a unique facet of the PWS risk assessment, made it possibleABSTRACT: The Prince William Sound (PWS) risk assessment was a joint project of Det Norske Veritas

van Dorp, Johan René

198

Proprioception and joint stability  

Microsoft Academic Search

In the present paper the current clinical knowledge about proprioception is given for the shoulder, knee, ankle, elbow and the radiocarpal joint. Proprioceptive capabilities are decreased after joint injuries such as ACL or meniscus tears, shoulder dislocation, ankle sprain and in joints with degenerative joint disease. Some surgical procedures seem to restore the proprioceptive abilities; others do not. Elastic knee

J. Jerosch; M. Prymka

1996-01-01

199

Copyright 2000 by the Genetics Society of America Deletion of an Insulator Element by the Mutation facet-strawberry  

E-print Network

by the Mutation facet-strawberry in Drosophila melanogaster Julio Vazquez* and Paul Schedl *Department mutation, facet-strawberry (faswb ), suggest that this small deletion disrupts such a boundary element

Schedl, Paul

200

Photocatalytic and Dye-Sensitized Solar Cell Performances of {010}-Faceted and [111]-Faceted Anatase TiO2 Nanocrystals Synthesized from Tetratitanate Nanoribbons.  

PubMed

The morphology and exposed facet of the anatase-type TiO2 are very important to improve the photocatalytic activity and photovoltaic performance in dye-sensitized solar cells. In this work, we report the synthesis and the photocatalytic and dye-sensitized solar cell performances of anatase-type TiO2 single nanocrystals with exposed {010}- and [111]-facets and with various morphologies by using exfoliated tetratitanate nanoribbons as precursors. The precursor nanoribbons were prepared from the exfoliation of the protonated and, subsequently, tetramethylammonium/H(+) ion-exchanged K2Ti4O9. The colloidal suspension containing the nanoribbons was hydrothermally heated with a microwave-assistance at temperatures from 120 to 190 °C after pH was adjusted to 0.5-14. The dependence of the crystalline phases on temperature and pH indicated that anatase single phase can be obtained at pH 3-13 whereas temperatures higher than 160 °C. The [111]-faceted nanorod-shaped anatase nanocrystals were formed preferentially at pH ? 3, whereas the {010}-faceted anatase nanocrystals with morphologies of rhombic, cuboid, and spindle were preferentially at pH ?5. The morphology observation revealed that the nanoribbons were transformed to anatase nanocrystals mainly by the topotactic structural transformation reaction accompanied by an Ostwald ripening reaction, and pH of the reaction solution took a critical role in the crystal morphology change. At pH ?1, the mixture of anatase, rutile, and brookite were obtained at higher temperature conditions. The photocatalytic activity and photovoltaic performance were enhanced in an order of surface without a specific facet < [111]-faceted surface < {010}-faceted surface. PMID:25158319

Du, Yi-En; Feng, Qi; Chen, Changdong; Tanaka, Yasuhiro; Yang, Xiaojing

2014-09-24

201

Friction in total hip joint prosthesis measured in vivo during walking.  

PubMed

Friction-induced moments and subsequent cup loosening can be the reason for total hip joint replacement failure. The aim of this study was to measure the in vivo contact forces and friction moments during walking. Instrumented hip implants with Al2O3 ceramic head and an XPE inlay were used. In vivo measurements were taken 3 months post operatively in 8 subjects. The coefficient of friction was calculated in 3D throughout the whole gait cycle, and average values of the friction-induced power dissipation in the joint were determined. On average, peak contact forces of 248% of the bodyweight and peak friction moments of 0.26% bodyweight times meter were determined. However, contact forces and friction moments varied greatly between individuals. The friction moment increased during the extension phase of the joint. The average coefficient of friction also increased during this period, from 0.04 (0.03 to 0.06) at contralateral toe off to 0.06 (0.04 to 0.08) at contralateral heel strike. During the flexion phase, the coefficient of friction increased further to 0.14 (0.09 to 0.23) at toe off. The average friction-induced power throughout the whole gait cycle was 2.3 W (1.4 W to 3.8 W). Although more parameters than only the synovia determine the friction, the wide ranges of friction coefficients and power dissipation indicate that the lubricating properties of synovia are individually very different. However, such differences may also exist in natural joints and may influence the progression of arthrosis. Furthermore, subjects with very high power dissipation may be at risk of thermally induced implant loosening. The large increase of the friction coefficient during each step could be caused by the synovia being squeezed out under load. PMID:24260114

Damm, Philipp; Dymke, Joern; Ackermann, Robert; Bender, Alwina; Graichen, Friedmar; Halder, Andreas; Beier, Alexander; Bergmann, Georg

2013-01-01

202

Friction in Total Hip Joint Prosthesis Measured In Vivo during Walking  

PubMed Central

Friction-induced moments and subsequent cup loosening can be the reason for total hip joint replacement failure. The aim of this study was to measure the in vivo contact forces and friction moments during walking. Instrumented hip implants with Al2O3 ceramic head and an XPE inlay were used. In vivo measurements were taken 3 months post operatively in 8 subjects. The coefficient of friction was calculated in 3D throughout the whole gait cycle, and average values of the friction-induced power dissipation in the joint were determined. On average, peak contact forces of 248% of the bodyweight and peak friction moments of 0.26% bodyweight times meter were determined. However, contact forces and friction moments varied greatly between individuals. The friction moment increased during the extension phase of the joint. The average coefficient of friction also increased during this period, from 0.04 (0.03 to 0.06) at contralateral toe off to 0.06 (0.04 to 0.08) at contralateral heel strike. During the flexion phase, the coefficient of friction increased further to 0.14 (0.09 to 0.23) at toe off. The average friction-induced power throughout the whole gait cycle was 2.3 W (1.4 W to 3.8 W). Although more parameters than only the synovia determine the friction, the wide ranges of friction coefficients and power dissipation indicate that the lubricating properties of synovia are individually very different. However, such differences may also exist in natural joints and may influence the progression of arthrosis. Furthermore, subjects with very high power dissipation may be at risk of thermally induced implant loosening. The large increase of the friction coefficient during each step could be caused by the synovia being squeezed out under load. PMID:24260114

Damm, Philipp; Dymke, Joern; Ackermann, Robert; Bender, Alwina; Graichen, Friedmar; Halder, Andreas; Beier, Alexander; Bergmann, Georg

2013-01-01

203

Obtaining Content Weights for Test Specifications from Job Analysis Task Surveys: An Application of the Many-Facets Rasch Model  

ERIC Educational Resources Information Center

This article discusses the use of the Many-Facets Rasch Model, via the FACETS computer program (Linacre, 2006a), to scale job/practice analysis survey data as well as to combine multiple rating scales into single composite weights representing the tasks' relative importance. Results from the Many-Facets Rasch Model are compared with those…

Wang, Ning; Stahl, John

2012-01-01

204

Diagnostic challenge: bilateral infected lumbar facet cysts--a rare cause of acute lumbar spinal stenosis and back pain.  

PubMed

Symptomatic synovial lumbar facet cysts are a relatively rare cause of radiculopathy and spinal stenosis. This case and brief review of the literature, details a patient who presented with acutely symptomatic bilateral spontaneously infected synovial facet (L4/5) cysts. This report highlights diagnostic clues for identifying infection of a facet cyst. PMID:20205727

Freedman, Brett A; Bui, Tuan L; Yoon, S Timothy

2010-01-01

205

Improving Personality Facet Scores with Multidimensional Computer Adaptive Testing: An Illustration with the Neo Pi-R  

ERIC Educational Resources Information Center

Narrowly defined personality facet scores are commonly reported and used for making decisions in clinical and organizational settings. Although these facets are typically related, scoring is usually carried out for a single facet at a time. This method can be ineffective and time consuming when personality tests contain many highly correlated…

Makransky, Guido; Mortensen, Erik Lykke; Glas, Cees A. W.

2013-01-01

206

Specific oriented metal-organic framework membranes and their facet-tuned separation performance.  

PubMed

Modulating the crystal morphology, or the exposed crystal facets, of metal-organic frameworks (MOFs) expands their potential applications in catalysis, adsorption, and separation. In this article, by immobilizing the citrate modulators on Au nanoparticles and subsequently being fixed on solid copper hydroxide nanostrands, a well-intergrown and oriented HKUST-1 cube crystal membrane was formed at room temperature. In contrast, in the absence of Au nanoparticles, well-intergrown and oriented cuboctahedron and octahedron membranes were formed in water/ethanol and ethanol, respectively. The gas separation performances of these HKUST-1 membranes were tuned via their exposed facets with defined pore sizes. The HKUST-1 cube membrane with exposed {001} facets demonstrated the highest permeance but lowest gas binary separation factors, while the octahedron membrane with exposed {111} facets presented the highest separation factors but lowest permeance, since the window size of {111} facets is 0.46 nm which is smaller than 0.9 nm of {001} facets. Separation of 0.38 nm CO2 from 0.55 nm SF6 was realized by the HKUST-1 octahedron membrane. As a proof of concept, this will open a new way to design MOF-related separation membranes by facet controlling. PMID:25184955

Mao, Yiyin; Su, Binbin; Cao, Wei; Li, Junwei; Ying, Yulong; Ying, Wen; Hou, Yajun; Sun, Luwei; Peng, Xinsheng

2014-09-24

207

Etched facet and semiconductor/air DBR facet of a AlGaInP laser diode prepared by focused ion beam milling  

NASA Astrophysics Data System (ADS)

The study of focused ion beam (FIB) milling for making etched facet and semiconductor/air distributed Bragg reflector (DBR) facets of AlGaInP-based red laser diodes (LD) is presented in this letter. For the Ga ion beam current of 100 pA at fixed accelerated voltage 30 kV, FIB milling rate of GaAs was found to be 0.46 ?m 3/nC. As a trade-off between high reflectivity and enough technical tolerance, the combination of third Bragg orders of semiconductor wall and air gap was chosen. The deeply etched mirror and distributed Bragg reflector facet consisting of pairs of semiconductor wall/air gap on laser diodes (LD) cavity facets with vertical sidewall on AlGaInP LDs were fabricated by focused Ga ion beam milling. Comparison of the AlGaInP LD with the mirrors between cleaved and FIB made facet was given and discussed.

Ren, Qian; Zhang, Bei; Xu, Jun; Zhang, ZhenSheng; Jin, YanBo; Qian, Yi; Yu, DaPeng

2004-05-01

208

A Systems Biology Approach to Synovial Joint Lubrication in Health, Injury, and Disease  

PubMed Central

The synovial joint contains synovial fluid (SF) within a cavity bounded by articular cartilage and synovium. SF is a viscous fluid that has lubrication, metabolic, and regulatory functions within synovial joints. SF contains lubricant molecules, including proteoglycan-4 and hyaluronan. SF is an ultrafiltrate of plasma with secreted contributions from cell populations lining and within the synovial joint space, including chondrocytes and synoviocytes. Maintenance of normal SF lubricant composition and function are important for joint homeostasis. In osteoarthritis, rheumatoid arthritis, and joint injury, changes in lubricant composition and function accompany alterations in the cytokine and growth factor environment and increased fluid and molecular transport through joint tissues. Thus, understanding the synovial joint lubrication system requires a multi-faceted study of the various parts of the synovial joint and their interactions. Systems biology approaches at multiple scales are being used to describe the molecular, cellular, and tissue components and their interactions that comprise the functioning synovial joint. Analyses of the transcriptome and proteome of SF, cartilage, and synovium suggest that particular molecules and pathways play important roles in joint homeostasis and disease. Such information may be integrated with physicochemical tissue descriptions to construct integrative models of the synovial joint that ultimately may explain maintenance of health, recovery from injury, or development and progression of arthritis. PMID:21826801

Hui, Alexander Y.; McCarty, William J.; Masuda, Koichi; Firestein, Gary S.; Sah, Robert L.

2013-01-01

209

Butt Joint Tool Commissioning  

SciTech Connect

ITER Central Solenoid uses butt joints for connecting the pancakes in the CS module. The principles of the butt joining of the CICC were developed by the JAPT during CSMC project. The difference between the CSMC butt joint and the CS butt joint is that the CS butt joint is an in-line joint, while the CSMC is a double joint through a hairpin jumper. The CS butt joint has to carry the hoop load. The straight length of the joint is only 320 mm, and the vacuum chamber around the joint has to have a split in the clamp shell. These requirements are challenging. Fig.1 presents a CSMC joint, and Fig.2 shows a CS butt joint. The butt joint procedure was verified and demonstrated. The tool is capable of achieving all specified parameters. The vacuum in the end was a little higher than the target, which is not critical and readily correctable. We consider, tentatively that the procedure is established. Unexpectedly, we discover significant temperature nonuniformity in the joint cross section, which is not formally a violation of the specs, but is a point of concern. All testing parameters are recorded for QA purposes. We plan to modify the butt joining tool to improve its convenience of operation and provide all features necessary for production of butt joints by qualified personnel.

Martovetsky, N N

2007-12-06

210

{116} faceted anatase single-crystalline nanosheet arrays: facile synthesis and enhanced electrochemical performances.  

PubMed

Single-crystalline anatase TiO2 nanosheet arrays were synthesized on a transparent conductive fluorine-doped tin oxide (FTO) substrate with a unique one-step alcohol-thermal process. The nanosheets were nearly vertically grown on the FTO substrate along their <11[combining macron]0> zone, and they were dominated by {116} facets. The as-fabricated {116} faceted single-crystalline anatase nanosheet arrays exhibit a much higher reduction capacity and a much better electrochemical reversibility than both {001} faceted anatase single-crystalline nanosheet arrays and P25 film. The results indicate a promising application potential for the new material in the photoelectrochemical field. PMID:25247926

Li, Feng; Li, Xiaoning; Peng, Ranran; Zhai, Xiaofang; Yang, Shangfeng; Fu, Zhengping; Lu, Yalin

2014-10-01

211

Pathological eating behaviors, BMI, and facet-level traits: the roles of conscientiousness, neuroticism, and impulsivity.  

PubMed

The current study examined the bivariate and multivariate associations of personality with Body Mass Index (BMI) and several eating behavior inventories, focusing on facets of Neuroticism, Conscientiousness, and Impulsivity. Simultaneous multiple regressions showed that the facets Traditionalism, Urgency, and low Vulnerability were significant predictors of BMI. A factor analysis of the eating behavior scales revealed two dimensions: (a) Food and Body Preoccupation and (b) Cued Eating; Neuroticism, low Conscientiousness, and Perfectionism were significant predictors of both eating behavior factors. In addition, the Depression facet predicted Food and Body Preoccupation, and low Temperance predicted Cued Eating. Implications are discussed for the structure of eating pathology and the specificity of facet traits to eating behaviors and obesity. PMID:24183129

Ellickson-Larew, Stephanie; Naragon-Gainey, Kristin; Watson, David

2013-12-01

212

Facet-dependent electrochemical properties of Co3O4 nanocrystals toward heavy metal ions  

NASA Astrophysics Data System (ADS)

We revealed an interesting facet-dependent electrochemical behavior toward heavy metal ions (HMIs) based on their adsorption behaviors. The (111) facet of Co3O4 nanoplates has better electrochemical sensing performance than that of the (001) facet of Co3O4 nanocubes. Adsorption measurements and density-functional theory (DFT) calculations reveals that adsorption of HMIs is responsible for the difference of electrochemical properties. Our combined experimental and theoretical studies provide a solid hint to explain the mechanism of electrochemical detection of HMIs using nanoscale metal oxides. Furthermore, this study not only suggests a promising new strategy for designing high performance electrochemical sensing interface through the selective synthesis of nanoscale materials exposed with different well-defined facets, but also provides a deep understanding for a more sensitive and selective electroanalysis at nanomaterials modified electrodes.

Yu, Xin-Yao; Meng, Qiang-Qiang; Luo, Tao; Jia, Yong; Sun, Bai; Li, Qun-Xiang; Liu, Jin-Huai; Huang, Xing-Jiu

2013-10-01

213

Sparsely Faceted Arrays: A Mechanism Supporting Parallel Allocation, Communication, and Garbage Collection  

E-print Network

Conventional parallel computer architectures do not provide support for non-uniformly distributed objects. In this thesis, I introduce sparsely faceted arrays (SFAs), a new low-level mechanism for naming regions of memory, ...

Brown, Jeremy Hanford

2002-06-01

214

Openness to Experience and Mortality in Men: Analysis of Trait and Facets  

PubMed Central

Objectives We examined whether specific facets are more robust predictors of mortality risk than overall trait openness in a sample of older men. Methods The current investigation used data from 1,349 men from the Veterans Affairs Normative Aging Study. From 1990–1991 to 2008, 547 (41%) had died. We used exploratory factor analysis to extract facets of openness, followed by proportional hazards modeling to examine 18-year mortality risk. Results Two facets emerged from the openness adjectives: intellect and creativity. In the fully adjusted model, only creativity predicted mortality risk. A 1-SD increase in creativity was associated with a 12% decrease in mortality risk. Discussion The study demonstrated that consideration of facets allows for a more precise understanding of the personality–health association. Higher levels of creativity predict longer survival in a sample of older men which provides preliminary support of the protective role creativity has on health even at advanced ages. PMID:22219209

Turiano, Nicholas A.; Spiro, Avron; Mroczek, Daniel K.

2013-01-01

215

Valid Inequalities and Facets for the Steinger Problem in a Directed Graph  

E-print Network

In this paper, we describe the facial structure of the steiner problem in a directed graph by formulating it as a set covering problem. We first characterize trivial facets and derive a necessary condition for nontrivial ...

Myung, Young-soo

216

Large displacement spherical joint  

DOEpatents

A new class of spherical joints has a very large accessible full cone angle, a property which is beneficial for a wide range of applications. Despite the large cone angles, these joints move freely without singularities.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2002-01-01

217

Joint Injection/Aspiration  

MedlinePLUS

... osteoarthritis. What usually is injected into the joint space? Corticosteroids (such as methylprednisolone and triamcinolone formulated to ... for producing inflammation and pain within the joint space. Although corticosteroids may also be successfully used in ...

218

Facet Model and Mathematical Morphology for Surface Characterization  

SciTech Connect

This paper describes an algorithm for the automatic segmentation and representation of surface structures and non-uniformities in an industrial setting. The automatic image processing and analysis algorithm is developed as part of a complete on-line web characterization system of a papermaking process at the wet end. The goal is to: (1) link certain types of structures on the surface of the web to known machine parameter values, and (2) find the connection between detected structures at the beginning of the line and defects seen on the final product. Images of the pulp mixture (slurry), carried by a fast moving table, are obtained using a stroboscopic light and a CCD camera. This characterization algorithm succeeded where conventional contrast and edge detection techniques failed due to a poorly controlled environment. The images obtained have poor contrast and contain noise caused by a variety of sources. After a number of enhancement steps, conventional segmentation methods still f ailed to detect any structures and are consequently discarded. Techniques tried include the Canny edge detector, the Sobel, Roberts, and Prewitt's filters, as well as zero crossings. The facet model algorithm, is then applied to the images with various parameter settings and is found to be successful in detecting the various topographic characteristics of the surface of the slurry. Pertinent topographic elements are retained and a filtered image computed. Carefully tailored morphological operators are then applied to detect and segment regions of interest. Those regions are then selected according to their size, elongation, and orientation. Their bounding rectangles are computed and represented. Also addressed in this paper are aspects of the real time implementation of this algorithm for on-line use. The algorithm is tested on over 500 images of slurry and is found to segment and characterize nonuniformities on all 500 images.

Abidi, B.R.; Goddard, J.S.; Hunt, M.A.; Sari-Sarraf, H.

1999-11-13

219

Domains and Facets: Hierarchical Personality Assessment Using the Revised NEO Personality Inventory  

Microsoft Academic Search

Personality traits are organized hierarchically, with narrow, specific traits com- bining to define broad, global factors. The Revised NEO Personality Inventory (NEO-PI-R; Costa & McCrae, 1992c) assesses personality at bo1.h levels, with six specific facet scales in each of five broad domains. This article describes conceptual issues in specifying facets of a domain and reports evidence on the validity of

Paul T. Costa; Robert R. McCrae

1995-01-01

220

Cleaved GaN facets by wafer fusion of GaN to InP  

Microsoft Academic Search

Basal plane sapphire is a common substrate for the heteroepitaxy of GaN. This presents a challenge for fabrication of cleaved-facet GaN lasers because the natural cleavage planes in (0001) ?-Al2O3 are not perpendicular to the wafer surface. This letter describes a method for achieving perpendicular cleaved facets through wafer fusion that can potentially be used to fabricate GaN based in-plane

R. K. Sink; S. Keller; B. P. Keller; D. I. Babic; A. L. Holmes; D. Kapolnek; S. P. Denbaars; J. E. Bowers; X. H. Wu; J. S. Speck

1996-01-01

221

Plasma Wakefield Acceleration and FACET - Facilities for Accelerator Science and Experimental Test Beams at SLAC  

SciTech Connect

Plasma wakefield acceleration is one of the most promising approaches to advancing accelerator technology. This approach offers a potential 1,000-fold or more increase in acceleration over a given distance, compared to existing accelerators.  FACET, enabled by the Recovery Act funds, will study plasma acceleration, using short, intense pulses of electrons and positrons. In this lecture, the physics of plasma acceleration and features of FACET will be presented.  

Andrei Seryi

2009-09-09

222

Porous single-crystalline palladium nanoflowers with enriched {100} facets for highly enhanced ethanol oxidation.  

PubMed

Palladium porous single-crystalline nanoflowers (PSNFs) with enriched high catalytic activity {100} facets were synthesized using a mild and controllable seed mediated growth method. The growth mechanism of the Pd PSNFs was investigated using time dependent morphology evolution through TEM imaging. Due to the specific structure, Pd PSNFs show highly enhanced ethanol oxidation reaction (EOR) activity, high EOR anti-poisoning and stability, much better than Pd nanocubes, {111} facets dominated dendritic urchin-like Pd nanoparticles and Pd black. PMID:25370157

Qi, Kun; Wang, Qiyu; Zheng, Weitao; Zhang, Wei; Cui, Xiaoqiang

2014-12-21

223

Laser Scribing for Facet Fabrication of InGaN MQW Diode Lasers on Sapphire Substrates  

Microsoft Academic Search

In this letter, a novel method for the fabrication of high-quality facets for III-nitride lasers grown on c -plane sapphire substrates as well as on GaN substrates is presented. Based on a laser scribing process gain-guided laser diodes with smooth facets were fabricated, which showed threshold current densities of 6.5 kA\\/cm2 at an emission wavelength of 405 nm under pulsed

Jan-Robert van Look; Sven Einfeldt; Olaf Kruger; Veit Hoffmann; Arne Knauer; Markus Weyers; Patrick Vogt; Michael Kneissl

2010-01-01

224

Fabrication of dry etched and subsequently passivated laser facets in GaAs/AlGaAs  

SciTech Connect

The aging behavior of edge emitting laser diodes based on GaAs/AlGaAs is investigated by comparing devices with facets that are alternatively cleaved or dry etched and consecutively treated with H{sub 2}S. In this work we demonstrate that an in situ exposure to H{sub 2}S gas is not sufficient to prevent ageing but an additional plasma treatment is rather required to obtain comparable ageing results to lasers with cleaved facets.

Deichsel, Eckard; Franz, Gerhard [University of Ulm, Ulm, Germany and Swiss Federal Institute of Technology, Lausanne (Switzerland); Munich University of Applied Sciences, Munich, Bavaria (Germany)

2004-09-01

225

Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie & Diagonal Brace Joint Detail; Chord, Panel Post, Tie & Crossbracing Joint Detail - Dunlapsville Covered Bridge, Spanning East Fork Whitewater River, Dunlapsville, Union County, IN

226

Jointly Poisson processes  

Microsoft Academic Search

What constitutes jointly Poisson processes remains an unresolved issue. This report reviews the current state of the theory and indicates how the accepted but unproven model equals that resulting from the small time-interval limit of jointly Bernoulli processes. One intriguing consequence of these models is that jointly Poisson processes can only be positively correlated as measured by the correlation coefficient

D. H. Johnson; I. N. Goodman

2009-01-01

227

Branched Au Nanostructures Enriched with a Uniform Facet: Facile Synthesis and Catalytic Performances  

PubMed Central

Well–defined noble metal nanocrystals (NMNCs) of a unique morphology yet a uniform facet have attracted broad interests. In this regard, those with a highly branched architecture have gained particular attention. Most of the currently existing branched NMNCs, however, are enclosed by mixed facets. We now report that branched Au nanoarchitectures could be facilely fabricated by mixing an aqueous solution of KAuCl4, an aqueous dispersion of graphene oxide, and ethanol under ambient conditions. Interestingly, unilike the conventional branched NMNCs, our unique Au nanostructures are predominately enriched with a uniform facet of {111}. Compared to the spherical Au nanostructures exposed with mixed facets, our branched nanospecies of a uniform facet display superior catalytic performances both for the catalytic reduction of 4–nitrophenol and the electrocatalytic oxidation of methanol. Our investigation represents the first example that Au nanostructures simultaneously featured with a highly branched architecture and a uniform crystal facet could be formulated. Our unique Au nanostructures provide a fundamental yet new scientific forum to disclose the correlation between the surface atomic arrangement and the catalytic performances of branched NMNCs. PMID:24918973

Zhu, Mingshan; Lei, Bin; Ren, Fangfang; Chen, Penglei; Shen, Yunfan; Guan, Bo; Du, Yukou; Li, Tiesheng; Liu, Minghua

2014-01-01

228

Branched Au Nanostructures Enriched with a Uniform Facet: Facile Synthesis and Catalytic Performances  

NASA Astrophysics Data System (ADS)

Well-defined noble metal nanocrystals (NMNCs) of a unique morphology yet a uniform facet have attracted broad interests. In this regard, those with a highly branched architecture have gained particular attention. Most of the currently existing branched NMNCs, however, are enclosed by mixed facets. We now report that branched Au nanoarchitectures could be facilely fabricated by mixing an aqueous solution of KAuCl4, an aqueous dispersion of graphene oxide, and ethanol under ambient conditions. Interestingly, unilike the conventional branched NMNCs, our unique Au nanostructures are predominately enriched with a uniform facet of {111}. Compared to the spherical Au nanostructures exposed with mixed facets, our branched nanospecies of a uniform facet display superior catalytic performances both for the catalytic reduction of 4-nitrophenol and the electrocatalytic oxidation of methanol. Our investigation represents the first example that Au nanostructures simultaneously featured with a highly branched architecture and a uniform crystal facet could be formulated. Our unique Au nanostructures provide a fundamental yet new scientific forum to disclose the correlation between the surface atomic arrangement and the catalytic performances of branched NMNCs.

Zhu, Mingshan; Lei, Bin; Ren, Fangfang; Chen, Penglei; Shen, Yunfan; Guan, Bo; Du, Yukou; Li, Tiesheng; Liu, Minghua

2014-06-01

229

Two-wavelength butt-joint diode lasers for the difference- and sum-frequency generation  

Microsoft Academic Search

Summary form only given. The new design of the nonlinear mixing heterolasers, Butt-Joint Laser, where two butt-joined laser diodes are optically coupled but injection pumped separately, are presented. Two diode lasers operate at slightly different frequencies in the near-IR range and are mounted top side down on a mutual heat sink with their facets touched or separated by a few

A. A. Biryukov; S. M. Nekorkin; N. B. Zvonkov; V. Ya. Aleshkin; V. I. Gavrilenko; K. V. Maremjanin; S. V. Morozov; A. A. Belyanin; V. V. Kocharovsky; M. O. Scully

2005-01-01

230

Immunohistochemical Evaluation of Neuroreceptors in Healthy and Pathological Temporo-Mandibular Joint  

PubMed Central

Aim: A study was performed on the articular disk and periarticular tissues of the temporo-mandibular joint (TMJ) with immunohistochemical techniques to give evidence to the presence of neuroreceptors (NRec) in these sites. Methods: The study was carried out on tissue samples obtained from 10 subjects without TMJ disease and from 7 patients with severe TMJ arthritis and arthrosis. We use antibodies directed against following antigens: Gliofibrillary Acidic Protein (GFAP), Leu-7, Myelin Basic Protein (MBP), Neurofilaments 68 kD (NF), Neuron Specific Enolase (NSE), S-100 protein (S-100) and Synaptophysin (SYN). Results: This study revealed that Ruffini's-like, Pacini's-like and Golgi's-like receptors can be demonstrated in TMJ periarticular tissues and that free nervous endings are present in the subsynovial tissues but not within the articular disk. We observed elongated cytoplamic processes of chondrocytes that demonstrated strong S-100 immunoreactivity but they were unreactive with all other antibodies. These cytoplamic processes were more abundant and thicker in the samples obtained from patients with disease TMJ. Conclusion: The results of this study confirm that different Nrec are detectable in TMJ periarticular tissues but they are absent within the articular disk. In the latter site, only condrocytic processes are evident, especially in diseased TMJ, and they might have been confused with nervous endings in previous morphological studies. Nevertheless the absence of immunoreactivity for NF, NSE and SYN proves that they are not of neural origin. PMID:24151441

Favia, Gianfranco; Corsalini, Massimo; Di Venere, Daniela; Pettini, Francesco; Favia, Giorgio; Capodiferro, Saverio; Maiorano, Eugenio

2013-01-01

231

Violence risk assessment and facet 4 of the Psychopathy Checklist: predicting institutional and community aggression in two forensic samples.  

PubMed

The Psychopathy Checklist and Psychopathy Checklist-Revised (PCL/PCL-R) were used to predict institutional aggression and community violence in two groups of forensic patients. Results showed that Facet 4 (Antisocial) of the PCL/PCL-R or one of its parcels consistently achieved incremental validity relative to the first three facets, whereas the first three facets failed to achieve incremental validity relative to Facet 4. One of the two Facet 4 parcels, Parcel G (General Acting Out), was the only PCL-R measure to consistently achieve success in classifying individual cases using the receiver operating characteristic approach. These findings suggest that Facet 4 and its parcels may play a role in violence risk assessment, although the generalizability of these findings to various forensic settings and contexts requires further study. PMID:20040729

Walters, Glenn D; Heilbrun, Kirk

2010-06-01

232

Neurologically Intact Patient Following Bilateral Facet Dislocation: Case Report and Review of Literature  

PubMed Central

Background Complete spinal cord lesions and quadriplegia occur in 50%-84% of patients with bilateral facet dislocation. We present a patient who suffered both bilateral facet dislocation and bilateral pedicle fractures while remaining neurologically intact. Based on this case and our literature review, we hypothesize that bilateral facet dislocations without neurological deficits are accompanied by significant associated fractures that facilitate the maintenance of cervical spine canal patency. Case Report After a fall down a flight of stairs, an 86-year-old woman presented to the hospital complaining of neck pain. She denied numbness and weakness of her extremities. On physical examination she was neurologically intact without focal sensory or motor deficits and with normal reflexes throughout. Computed tomography (CT) of her neck demonstrated bilateral C5-C6 facet dislocation with locking of the C6 superior articular process dorsal to the C5 inferior articular process, as well as corresponding bilateral C6 pedicle fractures. Additional acute fractures were identified on the thoracic CT. Magnetic resonance imaging demonstrated no spinal cord compression, edema, or hemorrhage. The patient had a C6-C7 anterior cervical discectomy and allograft fusion and a C5-T1 anterior cervical plate with screw fixation. Conclusion Because bilateral facet dislocations without neurological deficits are rare, the most appropriate surgical intervention is not evident. We believe the best choice as a first step is an anterior cervical discectomy and allograft fusion with plating. PMID:24688342

Chakravarthy, Vikram; Mullin, Jeffrey P.; Abbott, E. Emily; Anderson, James; Benzel, Edward C.

2014-01-01

233

Molecular simulation of the influence of interface faceting on the shock sensitivity of a model plastic bonded explosive.  

PubMed

Molecular dynamics simulations are used to model the shock loading of an interface with various degrees of nanometer scale faceting between an inert binder and an energetic crystal. The facets create regions of local compression that induce exothermic reaction that leads to local hotspots and an increased shock sensitivity to detonation. Two mechanisms for compression and hotspot formation are identified that depend on the shock impedance mismatch between the binder and energetic crystal, namely shock focusing and local compression of the facets. These results provide a possible explanation for why spherical RDX crystals in cast polymer-bonded explosives appear less shock sensitive than RDX with more faceted morphologies. PMID:18973371

Shi, Yunfeng; Brenner, Donald W

2008-11-27

234

Influence of the facet type on the performance of terahertz quantum cascade lasers with double-metal waveguides  

NASA Astrophysics Data System (ADS)

We investigate the influence of cleaved and dry chemically etched facets on the performance of terahertz quantum cascade lasers with double-metal waveguides. We theoretically show that the reflectivity and therefore also the mirror losses depend on the facet type. We fabricated devices employing both a cleaved and an etched facet, which show an asymmetric output characteristic. Furthermore, we compare the performance in terms of maximum operation temperature of lasers with each facet configuration. The results suggest that the devices are operated in a mirror loss dominated regime.

Brandstetter, Martin; Krall, Michael; Deutsch, Christoph; Detz, Hermann; Andrews, Aaron M.; Schrenk, Werner; Strasser, Gottfried; Unterrainer, Karl

2013-06-01

235

Validity of six openness facets in predicting work behaviors: a meta-analysis.  

PubMed

To illustrate the importance of facet-level investigations in predicting organizational outcomes and the need for more primary studies on this topic, we conducted a meta-analysis that took an exploratory look at differential relationships among 7 organizational criteria and Openness traits varying in breadth. Nine Openness predictors--the global dimension, 2 aspects (intellect and culture), and 6 facets (intellectual efficiency, ingenuity, curiosity, aesthetics, tolerance, and depth)--were examined in relations with various organizational criteria such as traditional performance outcomes (task performance, contextual performance, counterproductive work behavior), turnover, leadership effectiveness, training performance, and adaptive performance. Our results support the idea that Openness facets could exhibit differential validity for many organizational outcomes. PMID:23795997

Woo, Sang Eun; Chernyshenko, Oleksandr S; Stark, Stephen E; Conz, Gabriella

2014-01-01

236

Shapes, Sizes, and Faceting of Nanoscale Metal Particles for Applications in Catalysis  

SciTech Connect

In an effort to reduce the world's dependence on fossil fuels, proton exchange membrane fuel cells (PEMFC) are commonly considered as a prime candidate for alternative energy sources. The efficiency of fuel cells is limited by the oxygen reduction reaction (ORR) which is driven by platinum based catalysts. Numerous methods have been developed to synthesize particles which contain more active surfaces by tuning shapes, sizes and facets. Here, we will present a study of a well known wet chemical reduction method targeting specific morphologies and the resulting electrochemical activity. Studying the relationship between Pt facets at the bulk phase single crystal level versus the nanoscale correlates the effects of faceting on activities. Studying the formation of crystals during the course of the synthesis via transmission electron microscopy (TEM) and small angle x-ray scattering (SAXS) provides mechanistic insight on growth, while electrochemical studies correlate physical properties to performance.

Strand, M. B.; Leong, G. J.; Dinh, H. N.; Richards, R. M.

2013-01-01

237

Interferometric technique for faceted microstructure metrology using an index matching liquid  

SciTech Connect

Microstructured optical products are becoming more widespread due to advances in manufacturing. Many of these structures contain faceted surfaces with steep slopes. Adequate metrology for such surfaces is lacking. We describe an interferometric technique that combines plane wave illumination with an index matching liquid to achieve high quality, high speed measurements of such faceted microstructures. We account for refraction at the interfaces, rather than consider only optical path length changes due to the index liquid, and this significantly improves the facet angle measurement. We demonstrate the technique with the measurement of an array of micropyramids and show that our results are in good agreement with measurements taken on a contact profilometer. We also extend the technique to measure opaque microcorner cubes by implementing an intermediate replication step.

Purcell, Daryl; Suratkar, Amit; Davies, Angela; Farahi, Faramarz; Ottevaere, Heidi; Thienpont, Hugo

2010-02-01

238

Linear-phase approximation in the triangular facet near-field physical optics computer program  

NASA Technical Reports Server (NTRS)

Analyses of reflector antenna surfaces use a computer program based on a discrete approximation of the radiation integral. The calculation replaces the actual surface with a triangular facet representation; the physical optics current is assumed to be constant over each facet. Described here is a method of calculation using linear-phase approximation of the surface currents of parabolas, ellipses, and shaped subreflectors and compares results with a previous program that used a constant-phase approximation of the triangular facets. The results show that the linear-phase approximation is a significant improvement over the constant-phase approximation, and enables computation of 100 to 1,000 lambda reflectors within a reasonable time on a Cray computer.

Imbriale, W. A.; Hodges, R. E.

1990-01-01

239

Scanning-tunneling-microscopy study of faceting on high-step-density TaC surfaces  

SciTech Connect

We have studied the morphologies of the TaC(310), (210), and (110) surfaces using scanning tunneling microscopy. Heating the crystals to high temperatures activates a faceting of these surfaces into a hill-and-valley structure consisting of enlarged (100) terraces and (010) step walls. Step-separation distributions obtained from these surfaces can be well fit by sharp Gaussians and are much narrower than predicted for the noninteracting terrace-step-kink model, indicating a strong repulsive interaction exists between steps on the faceted surfaces. This faceting is suggested to be driven by a decrease in the total step repulsive energy through a reduction of the total number of step pairs. {copyright} {ital 1996 The American Physical Society.}

Zuo, J. [Department of Physics and Astronomy, Southwest Missouri State University, Springfield, Missouri 65804 (United States)] [Department of Physics and Astronomy, Southwest Missouri State University, Springfield, Missouri 65804 (United States); Carpinelli, J.M. [Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)] [Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); Zehner, D.M.; Wendelken, J.F. [Solid State Division, Oak Ridge, National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Solid State Division, Oak Ridge, National Laboratory, Oak Ridge, Tennessee 37831 (United States)

1996-06-01

240

Heritability of the big five personality dimensions and their facets: a twin study.  

PubMed

The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI-R) was assessed using 123 pairs of identical twins and 127 pairs of fraternal twins. Broad genetic influence on the five dimensions of Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness was estimated at 41%, 53%, 61%, 41%, and 44%, respectively. The facet scales also showed substantial heritability, although for several facets the genetic influence was largely nonadditive. The influence of the environment was consistent across all dimensions and facets. Shared environmental influences accounted for a negligible proportion of the variance in most scales, whereas nonshared environmental influences accounted for the majority of the environmental variance in all scales. PMID:8776880

Jang, K L; Livesley, W J; Vernon, P A

1996-09-01

241

{116} faceted anatase single-crystalline nanosheet arrays: facile synthesis and enhanced electrochemical performances  

NASA Astrophysics Data System (ADS)

Single-crystalline anatase TiO2 nanosheet arrays were synthesized on a transparent conductive fluorine-doped tin oxide (FTO) substrate with a unique one-step alcohol-thermal process. The nanosheets were nearly vertically grown on the FTO substrate along their <11&cmb.macr;0> zone, and they were dominated by {116} facets. The as-fabricated {116} faceted single-crystalline anatase nanosheet arrays exhibit a much higher reduction capacity and a much better electrochemical reversibility than both {001} faceted anatase single-crystalline nanosheet arrays and P25 film. The results indicate a promising application potential for the new material in the photoelectrochemical field.Single-crystalline anatase TiO2 nanosheet arrays were synthesized on a transparent conductive fluorine-doped tin oxide (FTO) substrate with a unique one-step alcohol-thermal process. The nanosheets were nearly vertically grown on the FTO substrate along their <11&cmb.macr;0> zone, and they were dominated by {116} facets. The as-fabricated {116} faceted single-crystalline anatase nanosheet arrays exhibit a much higher reduction capacity and a much better electrochemical reversibility than both {001} faceted anatase single-crystalline nanosheet arrays and P25 film. The results indicate a promising application potential for the new material in the photoelectrochemical field. Electronic supplementary information (ESI) available: Photo of the large area STNA-116, FESEM images of STNA-001 and STNA-116 with a series of growth time, the enlarged XRD pattern, the simulated SAED pattern, the reflectance spectra, the cyclic voltammograms of P25 on the FTO substrate. See DOI: 10.1039/c4nr04248d

Li, Feng; Li, Xiaoning; Peng, Ranran; Zhai, Xiaofang; Yang, Shangfeng; Fu, Zhengping; Lu, Yalin

2014-10-01

242

Faceting of {sigma}3 and {sigma}9 grain boundaries in Cu-Bi alloys  

SciTech Connect

The faceting of {sigma}3 and {sigma}9 tilt grain boundaries (GBs) has been studied in bicrystals of pure Cu and Cu-Bi alloys containing 2.5 x 10{sup -3}, 10 x 10{sup -3} and 16 x 10{sup -3} at.% Bi. The {sigma}3(1 0 0), {sigma}9(1 0 0), {sigma}9(-1 1 0), and {sigma}9(-1 2 0) facets and non-CSL {sigma}3 82 deg 9R facet were observed, where {sigma} is the inverse density of coincidence sites. The ratio between GB energy, {sigma}{sub GB}, and surface energy, {sigma}{sub sur}, was measured by atomic force microscopy using the GB thermal-groove method. The GB energy and thermal-groove deepening rate increased slightly between 0 and 10 x 10{sup -3} at.% Bi for all facets studied. However, between 10 x 10{sup -3} and 16 x 10{sup -3} at.% Bi the GB energy increased dramatically [from a factor 2 for the {sigma}9(1 1 0) facet to 15 times larger for the {sigma}3(1 0 0) facet]. The thermal-groove deepening rate also increased by a factor of 10 in this concentration range. This change corresponds well with the GB solidus line (i.e., the formation of a stable layer of a liquid-like GB phase called GB prewetting) observed previously. Wulff diagrams were constructed using measured {sigma}{sub GB}/{sigma}{sub sur} values.

Straumal, B.B. [Laboratory of Interfaces in Metals, Institute of Solid State Physics, Institutskii prospect 15, 142432 Chernogolovka, Moscow District (Russian Federation)]. E-mail: straumal@issp.ac.ru; Polyakov, S.A. [Laboratory of Interfaces in Metals, Institute of Solid State Physics, Institutskii prospect 15, 142432 Chernogolovka, Moscow District (Russian Federation); Max-Planck-Institut fuer Metallforschung and Institut fuer Metallkunde, Heisenbergstr. 3, 70569 Stuttgart (Germany); Bischoff, E. [Max-Planck-Institut fuer Metallforschung and Institut fuer Metallkunde, Heisenbergstr. 3, 70569 Stuttgart (Germany); Gust, W. [Max-Planck-Institut fuer Metallforschung and Institut fuer Metallkunde, Heisenbergstr. 3, 70569 Stuttgart (Germany); Baretzky, B. [Max-Planck-Institut fuer Metallforschung and Institut fuer Metallkunde, Heisenbergstr. 3, 70569 Stuttgart (Germany)

2005-01-10

243

Joint warfare system (JWARS)  

Microsoft Academic Search

The Joint Warfare System (JWARS) is a campaign-level model of military operations that is currently being developed under contract by the Office of the Secretary of Defense (OSD) for use by OSD, the Joint Staff, the Services, and the War fighting Commands. The behavior of military forces can be simulated from ports of embarkation through to their activities in combat.

A. Simlote

2003-01-01

244

Campylobacter Prosthetic Joint Infection  

PubMed Central

A 75-year-old man was diagnosed with probable Campylobacter jejuni prosthetic knee infection after a diarrheal illness. Joint aspirate and operative cultures were negative, but PCR of prosthesis sonicate fluid was positive, as was stool culture. Nineteen additional cases of Campylobacter prosthetic joint infection reported in the literature are reviewed. PMID:24523462

Vasoo, Shawn; Schwab, Jeramy J.; Cunningham, Scott A.; Robinson, Trisha J.; Cass, Joseph R.; Berbari, Elie F.; Walker, Randall C.; Osmon, Douglas R.

2014-01-01

245

Effect of the surface orientation on the microstructure of bulk Y-Ba-Cu-O joint  

NASA Astrophysics Data System (ADS)

Microstructural studies were performed at the joining area between two blocks of Y-Ba-Cu-O bulk superconductors using sintered ErBa 2Cu 3O y (Er123) welding solder when the joined surfaces were parallel to the (1 0 0) and (1 1 0) crystallographic planes. The residual liquid phase and the segregation of second phase particles were always observed in the joint with (1 0 0)/(1 0 0) surfaces, while no such defects were observed in the joint with (1 1 0)/(1 1 0) surfaces. Microstructural observations of the joint at several stages of the joining process showed that the growth front was always parallel to the (1 0 0) joined surfaces for the (1 0 0)/(1 0 0) joint, leading to the segregation of liquid phase and second phase particles. In contrast, many triangular crystals were observed at the (1 1 0)/(1 1 0) joint in that the (1 0 0) facet was tilted about 45° from the (1 1 0) joined surfaces, and thus allowing the complete reaction of the Er123 phase at the joint. Such growth morphology was the source of joint free from residual liquid phase and segregation of second phase that reduce the critical current in the (1 1 0)/(1 1 0) joint.

Yoshioka, J.; Iida, K.; Sakai, N.; Murakami, M.

2002-10-01

246

Hip joint replacement - series (image)  

MedlinePLUS

... pain that limits what you can do. Hip joint replacement is usually done in people age 60 and ... Hip joint replacement is surgery to replace all or part of the hip joint with a man-made or artificial ...

247

Pressure vessel flex joint  

NASA Technical Reports Server (NTRS)

An airtight, flexible joint is disclosed for the interfacing of two pressure vessels such as between the Space Station docking tunnel and the Space Shuttle Orbiter bulkhead adapter. The joint provides for flexibility while still retaining a structural link between the two vessels required due to the loading created by the internal/external pressure differential. The joint design provides for limiting the axial load carried across the joint to a specific value, a function returned in the Orbiter/Station tunnel interface. The flex joint comprises a floating structural segment which is permanently attached to one of the pressure vessels through the use of an inflatable seal. The geometric configuration of the joint causes the tension between the vessels created by the internal gas pressure to compress the inflatable seal. The inflation pressure of the seal is kept at a value above the internal/external pressure differential of the vessels in order to maintain a controlled distance between the floating segment and pressure vessel. The inflatable seal consists of either a hollow torus-shaped flexible bladder or two rolling convoluted diaphragm seals which may be reinforced by a system of straps or fabric anchored to the hard structures. The joint acts as a flexible link to allow both angular motion and lateral displacement while it still contains the internal pressure and holds the axial tension between the vessels.

Kahn, Jon B. (inventor)

1992-01-01

248

Effect of faceting on pore geometry in texturally equilibrated rocks: implications for low permeability at low porosity  

Microsoft Academic Search

The pore geometry of texturally equilibrated rocks is controlled by the interfacial energy ratio between grain boundaries and solid–liquid boundaries. Faceting at pore walls, which is a common feature of pore networks in rocks, strongly affects the liquid distribution. We investigated the effects of faceting on the equilibrium pore geometries based on image analysis of several systems with various degrees

Takashi Yoshino; Jonathan D. Price; David A. Wark; E. Bruce Watson

2006-01-01

249

Investigation of the facet-dependent performance of ?-Fe2O3 nanocrystals for heavy metal determination by stripping voltammetry.  

PubMed

We find for the first time that the electrochemical performances of the ?-Fe2O3 nanostructures depend on their exposed facets. Density functional theory calculations are carried out to better and scientifically understand the effect of different exposed facets at the atomic-scale level. PMID:24710198

Xu, Wei-Hong; Meng, Qiang-Qiang; Gao, Chao; Wang, Jing; Li, Qun-Xiang; Liu, Jin-Huai; Huang, Xing-Jiu

2014-05-21

250

Observations of oxidation mechanisms and kinetics in faceted FeCo magnetic nanoparticles  

E-print Network

Observations of oxidation mechanisms and kinetics in faceted FeCo magnetic nanoparticles N. J Fe50Co50 97V2Nb1 nanoparticles were synthesized in an induction plasma torch and oxidized of oxidation present at different temperatures. The initial oxide layer was nearly Co-free, beginning at 3 nm

McHenry, Michael E.

251

Consistently Orienting Facets in Polygon Meshes by Minimizing the Dirichlet Energy of Generalized Winding Numbers  

E-print Network

orienting facets in polygon meshes by minimizing the Dirichlet energy of generalized winding numbers. While based on the Dirichlet energy of the generalized winding number. Our motivation came from the fact Dirichlet energy of the corresponding generalized winding number. 2 Method 2.1 Patch extraction

Plotkin, Joshua B.

252

Nanosheet-constructed porous BiOCl with dominant {001} facets for superior photosensitized degradation  

NASA Astrophysics Data System (ADS)

Porous BiOCl micro-flowers constructed from ultrathin nanosheets with nearly 100% {001} facets exposed were selectively prepared. The exposed {001} facets terminated with a high density of oxygen atoms and are not only favorable for the adsorption of the cationic dye RhB but also can accumulate the photogenerated electrons injected from excited RhB. These electrons can be captured by O2 and transformed to reactive oxygen species, which possess a strong photooxidative ability to degrade the dye pollutants directly and easily. Therefore, the resultant BiOCl photocatalysts exhibit superior activity for indirect dye photosensitization degradation under visible light, with a rapid degradation rate and high photostability.Porous BiOCl micro-flowers constructed from ultrathin nanosheets with nearly 100% {001} facets exposed were selectively prepared. The exposed {001} facets terminated with a high density of oxygen atoms and are not only favorable for the adsorption of the cationic dye RhB but also can accumulate the photogenerated electrons injected from excited RhB. These electrons can be captured by O2 and transformed to reactive oxygen species, which possess a strong photooxidative ability to degrade the dye pollutants directly and easily. Therefore, the resultant BiOCl photocatalysts exhibit superior activity for indirect dye photosensitization degradation under visible light, with a rapid degradation rate and high photostability. Electronic supplementary information (ESI) available. See DOI: 10.1039/c2nr32533k

Wang, Dong-Hong; Gao, Gui-Qi; Zhang, Yue-Wei; Zhou, Li-Sha; Xu, An-Wu; Chen, Wei

2012-11-01

253

Berkeley Expressivity Questionnaire The Berkeley Expressivity Questionnaire assesses three facets of emotional expressivity: negative  

E-print Network

Berkeley Expressivity Questionnaire The Berkeley Expressivity Questionnaire assesses three facets-reports, peer ratings, and behavior. Journal of Personality and Social Psychology, 72, 435-448. Other references include: Gross, J.J. (2000). The Berkeley Expressivity Questionnaire. In J. Maltby, C.A. Lewis, & A

Gross, James J.

254

Psychometric and Structural Analysis of the MMPI-2 Personality Psychopathology Five (PSY-5) Facet Subscales  

ERIC Educational Resources Information Center

The Personality Psychopathology Five (PSY-5) is a model of personality psychopathology assessed in adult populations with a set of Minnesota Multiphasic Personality Inventory-2 (MMPI-2) scales. The authors examine the reliability and validity of recently developed lower-order facet subscales for each of these five domains, with an emphasis on…

Quilty, Lena C.; Bagby, R. Michael

2007-01-01

255

FACET: A simulation software framework for modeling complex societal processes and interactions  

SciTech Connect

FACET, the Framework for Addressing Cooperative Extended Transactions, was developed at Argonne National Laboratory to address the need for a simulation software architecture in the style of an agent-based approach, but with sufficient robustness, expressiveness, and flexibility to be able to deal with the levels of complexity seen in real-world social situations. FACET is an object-oriented software framework for building models of complex, cooperative behaviors of agents. It can be used to implement simulation models of societal processes such as the complex interplay of participating individuals and organizations engaged in multiple concurrent transactions in pursuit of their various goals. These transactions can be patterned on, for example, clinical guidelines and procedures, business practices, government and corporate policies, etc. FACET can also address other complex behaviors such as biological life cycles or manufacturing processes. To date, for example, FACET has been applied to such areas as land management, health care delivery, avian social behavior, and interactions between natural and social processes in ancient Mesopotamia.

Christiansen, J. H.

2000-06-02

256

Age Differences in Three Facets of Empathy: Performance-Based Evidence  

Microsoft Academic Search

This study investigated age differences in cognitive and affective facets of empathy: the ability to perceive another's emotions accurately, the capacity to share another's emotions, and the ability to behaviorally express sympathy in an empathic episode. Participants, 80 younger (Mage = 32 years) and 73 older (Mage = 59 years) adults, viewed eight film clips, each portraying a younger or

David Richter; Ute Kunzmann

2011-01-01

257

Au Photosensitized TiO2 Ultrathin Nanosheets with {001} Exposed Facets.  

PubMed

We report a general route for the direct growth of metal particles on TiO2 nanosheets with (001) exposed facets by an oxygen-vacancy-driven self-redox reaction. As there is no need for thermal treatment to remove stabilizing agents, the structure of the nanoparticles can be retained, preserving the active sites associated with high activity. PMID:25171297

Hu, Chao; Zhang, Xuan; Li, Xinshi; Yan, Yan; Xi, Guangcheng; Yang, Haifeng; Bai, Hua

2014-10-13

258

Exploring the Relationship between Workaholism Facets and Personality Traits: A Replication in American Workers  

ERIC Educational Resources Information Center

In this study, we further explored whether any of the dimensions in the five-factor model of personality (i.e., openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism) were related to facets of workaholism (i.e., work involvement, work drive, and work enjoyment) in a sample of American workers in various…

Aziz, Shahnaz; Tronzo, Casie L.

2011-01-01

259

Facet cutting and hydrogenation of In(2)O(3) nanowires for enhanced photoelectrochemical water splitting.  

PubMed

Semiconductor nanowires (NWs) are useful building blocks in optoelectronic, sensing, and energy devices and one-dimensional NWs have been used in photoelectrochemical (PEC) water splitting because of the enhanced light absorption and charge transport. It has been theoretically predicted that the {001} facets of body center cubic (bcc) In2O3 nanocrystals can effectively accumulate photogenerated holes under illumination, but it is unclear whether facet cutting of NWs can enhance the efficiency of PEC water splitting. In this work, the photocurrent of square In2O3 NWs with four {001} facets is observed to be an order of magnitude larger than that of cylindrical In2O3 NWs under the same conditions and subsequent hydrogen treatment further promotes the PEC water splitting performance of the NWs. The optimized hydrogenated In2O3 NWs yield a photocurrent density of 1.2 mA/cm(2) at 0.22 V versus Ag/AgCl with a Faradaic efficiency of about 84.4%. The enhanced PEC properties can be attributed to the reduced band gap due to merging of the disordered layer-induced band tail states with the valence band as well as improved separation of the photogenerated electrons/holes between the In2O3 crystal core and disordered layer interface. The results provide experimental evidence of the important role of facet cutting, which is promising in the design and fabrication of NW-based photoelectric devices. PMID:24568166

Meng, Ming; Wu, Xinglong; Zhu, Xiaobin; Zhu, Xiaoshu; Chu, Paul K

2014-03-26

260

Towards an Understanding of Facets and Exemplars of Big Data Applications Geoffrey C.Fox1  

E-print Network

Towards an Understanding of Facets and Exemplars of Big Data Applications Geoffrey C.Fox1 Big Data applications from a variety of research and commercial areas and suggest a set Big Data properties, and then to understand applications with those properties. There are many

261

Construct Validity of the Five Facet Mindfulness Questionnaire in Meditating and Nonmeditating Samples  

ERIC Educational Resources Information Center

Previous research on assessment of mindfulness by self-report suggests that it may include five component skills: observing, describing, acting with awareness, nonjudging of inner experience, and nonreactivity to inner experience. These elements of mindfulness can be measured with the Five Facet Mindfulness Questionnaire (FFMQ). The authors…

Baer, Ruth A.; Smith, Gregory T.; Lykins, Emily; Button, Daniel; Krietemeyer, Jennifer; Sauer, Shannon; Walsh, Erin; Duggan, Danielle; Williams, J. Mark G.

2008-01-01

262

Construct Validity of the Five Facet Mindfulness Questionnaire in Meditating and Nonmeditating Samples  

Microsoft Academic Search

Previous research on assessment of mindfulness by self-report suggests that it may include five component skills: observing, describing, acting with awareness, nonjudging of inner experience, and nonreactivity to inner experience. These elements of mindfulness can be measured with the Five Facet Mindfulness Questionnaire (FFMQ). The authors investigated several aspects of the construct validity of the FFMQ in experienced meditators and

Ruth A. Baer; Gregory T. Smith; Emily Lykins; Daniel Button; Jennifer Krietemeyer; Shannon Sauer; Erin Walsh; Danielle Duggan; J. Mark G. Williams

2008-01-01

263

Age and Gender Differences in the Relation between Self-Concept Facets and Self-Esteem  

ERIC Educational Resources Information Center

This study tested whether the gender intensification hypothesis applies to relations between multiple domain-specific self-concept facets and self-esteem. This hypothesis predicts gender-stereotypic differences in these relations and assumes they intensify with age. Furthermore, knowledge about gender-related or age-related differences in…

Arens, A. Katrin; Hasselhorn, Marcus

2014-01-01

264

POLARIMETRIC BISTATIC SIGNATURE OF A FACETED OCTAHEDRON IN HIGH-FREQUENCY DOMAIN  

Microsoft Academic Search

In this paper, the bistatic polarimetric signature of a perfectly conducting faceted octahedron with high dimensions with respect to the wavelength, is considered and a closed form solution for its fast computation is developed. This particular object, composed by eight triangularly shaped trihedral corner reflectors, should exhibit a large bistatic and monostatic Radar Cross Section (RCS) over a wide angular

Gildas Kubicke; Christophe Bourlier; Joseph Saillard

2007-01-01

265

Guttman-Jordan Facet Design and the Study of Law-Related Attitudes.  

ERIC Educational Resources Information Center

The development of an Attitude-Behavior Scale through an application of Guttman-Jordan facet design is detailed. The attitude scale was constructed to meet the need in law-related education for a valid attitudinal instrument to be used in research settings and in attitude change situations. A legal education program was used as a treatment in a…

Jacobson, Michael; Palonsky, Stuart

266

A LEVEL SET METHOD FOR THE EVOLUTION OF FACETED GIOVANNI RUSSO \\Lambda AND PETER SMEREKA y  

E-print Network

the curvature effects can be modeled by using crystalline curvature; for more details see Taylor [4, 5 approximation by diamonds grown by chemical vapor deposition. The (111) and (100) planes can grow at different numerical method to evolve a faceted seed which gives the correct Wulff shape [25]. A level set method based

Russo, Giovanni

267

Exploring the connections between visual merchandising and retail branding : An application of facet theory  

Microsoft Academic Search

Purpose – TThe purpose of this paper is to review the literature on facet theory and present an approach to map the relationship between retail branding (particularly brand recognition) and visual merchandising. Design\\/methodology\\/approach – Fact theory has been used in other areas of investigation, particularly for the examination of the built environment within psychology. However, it has received little attention

Barry J. Davies; Philippa Ward

2005-01-01

268

Faceting via correlated disorder of a stochastically growing interface or domain boundary  

E-print Network

the effect of screw dislocations or of grain boundaries again. We show that, for interface dimensions d = 1,2 during the growth (or evaporation) e-scale faceting develops, although on a small scale the interface is rough. Exploiting the formal connection...

Lyuksyutov, Igor F.; Everts, HU.

1998-01-01

269

Technology shapes every facet of modern life. Familiarity with the characteristics,  

E-print Network

Technology shapes every facet of modern life. Familiarity with the characteristics, capabilities, and limitations of current and emerging technologies is indispen- sable to wise and effective decisions and address the problems that technology often presents. Technologi- cal developments are indeed re

Ge, Qiaode Jeff

270

The multiple facets of c-aminobutyric acid dysfunction in epilepsy Yehezkel Ben-Aria  

E-print Network

REVIEW The multiple facets of c-aminobutyric acid dysfunction in epilepsy Yehezkel Ben inhibition to excitation in the developing brain and in epilepsies. This review deals with recent while inhibiting those of the mother. In epilepsies, recurrent seizures also lead to an accumulation

Cossart, Rosa

271

DEVELOPMENT OF AN ANALYTICAL METHOD FOR THE DETERMINATION OF QUINCLORAC (FACET) IN AIR SAMPLES  

EPA Science Inventory

Quinclorac (Facet) is a herbicide used on rice crops. Tomato farmers were concerned that aerial spraying of this herbicide was damaging their crops. The University of Arkansas initiated a study of air, soil, and plant material to see if this herbicide had entered these tomato f...

272

FACETS Report for Jan-May, 2007 1. Project summary and management  

E-print Network

, we have included the reporting of the cross-cutting activities within the other activities. 2 coupling of the multiple components that will comprise FACETS. Through a series of conference calls, an initial component interface that will allow implicit coupling has been defined. The design uses

273

A hybrid approach to software repository retrieval: Blending faceted classification and type signatures  

NASA Technical Reports Server (NTRS)

We present a user interface for software reuse repository that relies both on the informal semantics of faceted classification and the formal semantics of type signatures for abstract data types. The result is an interface providing both structural and qualitative feedback to a software reuser.

Eichmann, David A.

1992-01-01

274

Polymer waveguide end facet roughness and optical input/output coupling loss for OPCB applications  

NASA Astrophysics Data System (ADS)

Electro-optical printed circuit board technology (EOCB) based on integrated planar polymer optical waveguides has been the subject of research and development for many years to provide a cost viable, fully integrated system embedded optical interconnect solution, however a number of constraints of this technology have yet to be overcome. Optical coupling loss at the input and output of the waveguides is one of the major issues and waveguide end facet roughness is one of the main sources of the coupling loss which is investigated in this paper. The results of a comprehensive investigation of the end facet roughness of multimode polymer waveguides, fabricated on FR4 printed circuit boards, PCBs, and its effect of optical loss are presented theoretically and experimentally. The waveguide end facet roughness was measured using an atomic force microscope, AFM, when the waveguides were cut using a milling router with various numbers of cutting edges called flutes. The optimized cutting parameters are derived and the optical coupling loss, between the laser source and the waveguide, due to the different roughness magnitudes is measured by experiment for the first time. To improve the surface quality and decrease the waveguide optical loss, a new fabrication technique for reducing the end facet roughness after cutting is proposed and demonstrated. The insertion loss was reduced by 2.60 dB +/- 1.3 dB which is more than that achieved by other conventional methods such as index matching fluid.

Baghsiahi, Hadi; Wang, Kai; Pitwon, Richard; Selviah, David R.

2014-03-01

275

The Steiner tree problem I: Formulations, compositions and extension of facets  

Microsoft Academic Search

In this paper we give some integer programming formulations for the Steiner tree problem on undirected and directed graphs and study the associated polyhedra. We give some families of facets for the undirected case along with some compositions and extensions. We also give a projection that relates the Steiner tree polyhedron on an undirected graph to the polyhedron for the

Sunil Chopra; M. R. Rao

1994-01-01

276

Unique and Common Facets of Religion and Spirituality: Both Are Important  

Microsoft Academic Search

This commentary describes a multidimensional approach that underlies much recent empirical research on religion and spirituality (RS) and health. Each faith tradition possesses its own particularities, and common facets shared with other traditions as a coherent resemblance. Taxonomies of RS dimensions vary from being coarse grained to fine grained. The most useful taxonomy depends upon the particular research question. Fine-grained

Doug Oman

2009-01-01

277

Using Self-Report Assessment Methods to Explore Facets of Mindfulness  

ERIC Educational Resources Information Center

The authors examine the facet structure of mindfulness using five recently developed mindfulness questionnaires. Two large samples of undergraduate students completed mindfulness questionnaires and measures of other constructs. Psychometric properties of the mindfulness questionnaires were examined, including internal consistency and convergent…

Baer, Ruth A.; Smith, Gregory T.; Hopkins, Jaclyn; Krietemeyer, Jennifer; Toney, Leslie

2006-01-01

278

Mind Your Words: Positive and Negative Items Create Method Effects on the Five Facet Mindfulness Questionnaire  

ERIC Educational Resources Information Center

Mindfulness, a construct that entails moment-to-moment effort to be aware of present experiences and positive attitudinal features, has become integrated into the sciences. The Five Facet Mindfulness Questionnaire (FFMQ), one popular measure of mindfulness, exhibits different responses to positively and negatively worded items in nonmeditating…

Van Dam, Nicholas T.; Hobkirk, Andrea L.; Danoff-Burg, Sharon; Earleywine, Mitch

2012-01-01

279

Using Planar Facets for Stereovision SLAM Cyrille Berger and Simon Lacroix  

E-print Network

Using Planar Facets for Stereovision SLAM Cyrille Berger and Simon Lacroix Abstract In the context of stereovision SLAM, we propose a way to enrich the landmark models. Vision-based SLAM approaches usually rely. The paper depicts the chosen landmark model, the way to extract and match them, and presents some SLAM

Paris-Sud XI, Université de

280

Motivation as a Facet of School Readiness in a Head Start Sample  

ERIC Educational Resources Information Center

The EZ-Yale Personality Motivation Questionnaire (EZPQ) was used to measure motivation as a facet of school readiness in a sample of 133 children during the spring of their final year of Head Start. Three motivational constructs assessed by the EZPQ, academic mastery motivation, negative reaction tendency, and outerdirectedness, were associated…

Henrich, Christopher C.; Wheeler, Crista M.; Zigler, Edward F.

2005-01-01

281

Facets of Impulsivity Are Differentially Linked to Insomnia: Evidence From an Exploratory Study  

Microsoft Academic Search

This study investigated the association between insomnia and four facets of impulsivity as distinguished by Whiteside and Lynam (2001): urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking. A sample of 233 university students completed the UPPS Impulsive Behavior Scale, the Insomnia Severity Index, and a short questionnaire on sleep-related mentation. Correlational analyses revealed that urgency was related to

Ralph E. Schmidt; Philippe Gay; Martial Van der Linden

2008-01-01

282

Acromioclavicular joint dislocations.  

PubMed

Acromioclavicular (AC) dislocation is a common injury especially among sportsmen. There is still a lack of consensus on whether to conserve or operate type III AC joint dislocations. Even among surgeons inclined to operate AC joint dislocations there is no unanimity on which surgical technique. There are a plethora of choices between mechanical fixation or synthetic materials or biologic anatomic reconstructions. Even among surgeons, there is a choice between open repairs and the latest-arthroscopic reconstructions. This review of AC joint dislocations intends to analyze the available surgical options, a critical analysis of existing literature, actual technique of anatomic repair, and also accompanying complications. PMID:24431027

Babhulkar, Ashish; Pawaskar, Aditya

2014-03-01

283

Anterior glenohumeral joint dislocations.  

PubMed

The glenohumeral joint is the most mobile articulation in the body and the most commonly dislocated diarthroidal joint. Anterior dislocation is by far the most common direction and can lead to instability of the glenohumeral joint, which ranges from subtle increased laxity to recurrent dislocation. Overtime, understanding of anterior shoulder dislocations and the resulting instability has improved. Likewise, significant advances in arthroscopic equipment have allowed use of the arthroscope to address anatomically the various lesions that cause instability. This article reviews the anatomy, pathophysiology, clinical evaluation, and treatment of anterior shoulder instability. PMID:18803980

Dodson, Christopher C; Cordasco, Frank A

2008-10-01

284

Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells.  

PubMed

Platinum (Pt) nanocrystals have demonstrated to be an effective catalyst in many heterogeneous catalytic processes. However, pioneer facets with highest activity have been reported differently for various reaction systems. Although Pt has been the most important counter electrode material for dye-sensitized solar cells (DSCs), suitable atomic arrangement on the exposed crystal facet of Pt for triiodide reduction is still inexplicable. Using density functional theory, we have investigated the catalytic reaction processes of triiodide reduction over {100}, {111} and {411} facets, indicating that the activity follows the order of Pt(111) > Pt(411) > Pt(100). Further, Pt nanocrystals mainly bounded by {100}, {111} and {411} facets were synthesized and used as counter electrode materials for DSCs. The highest photovoltaic conversion efficiency of Pt(111) in DSCs confirms the predictions of the theoretical study. These findings have deepened the understanding of the mechanism of triiodide reduction at Pt surfaces and further screened the best facet for DSCs successfully. PMID:23670438

Zhang, Bo; Wang, Dong; Hou, Yu; Yang, Shuang; Yang, Xiao Hua; Zhong, Ju Hua; Liu, Jian; Wang, Hai Feng; Hu, P; Zhao, Hui Jun; Yang, Hua Gui

2013-01-01

285

Faceting in YBCO [001] High-Angle Tilt Boundaries and Critical current Densities  

NASA Astrophysics Data System (ADS)

The [001] high-angle tilt boundaries in YBa2Cu3O7-x (YBCO) thin films deposited on SrTiO3 (STO) bicrystal substrates have been studied by Scanning Squid (superconducting quantum interference device) Microscopy (SSM) and transmission electron microscopy (TEM). Generally critical current density across a boundary decreases with increasing misorientation. However, misorientation angle is found to be insufficient to predict the Jc behavior of a YBCO grain boundary. The two inclination angles of the adjacent grains are found to be important parameters. In two separate cases of same misoreintation but different inclinations, the boundaries exhibit drastically different superconducting behaviors and this has been observed by SSM imaging of Josephson vortices. The YBCO film boundary is far from an exact copy of the design boundary of the substrate bicrystal template. YBCO boundaries meander due to island formation during film growth. These microscopically wavy boundaries contain straight segments of atomistic facets. Three energetic criteria that affect faceting have been identified. The particular criterion that a facet plane cannot be too deviated from the design boundary plane (N< 28o) explains the strong effect of the design inclination angles on Jc despite extensive faceting. The original scattered values of Jc each obtained from individual fluxes' profiles of the same design boundary are likely to be a bona fide effect corresponding to individual facet having its own Josephson penetration length and Jc value. 1Materials Science Program, APAM, HKSM, Columbia Univ., NY, NY, 2Army Res. Lab, Aldephi, MD,3Texas Superconducting Ctr., Univ. of Houston, TX, +Now at Micron Tech. Boise, ID, *Now at Maxtor Corp., San Jose, CA., SWC, JWHT, and QJ acknowledge the support from National Science Foundation DMR-9803212, 0214650 and the facilities supported by DMR-9809687 & DMR-0213574.

Chan, Siu-Wai; Jin, Qiang; Tsai, Jack W. H.; Tidrow, Steven; Jiang, Qidu

2003-03-01

286

A new device used in the restoration of kinematics after total facet arthroplasty  

PubMed Central

Facet degeneration can lead to spinal stenosis and instability, and often requires stabilization. Interbody fusion is commonly performed, but it can lead to adjacent-segment disease. Dynamic posterior stabilization was performed using a total facet arthroplasty system. The total facet arthroplasty system was originally intended to restore the natural motion of the posterior stabilizers, but follow-up studies are lacking due to limited clinical use. We studied the first 14 cases (long-term follow-up) treated with this new device in our clinic. All patients were diagnosed with lumbar stenosis due to hypertrophy of the articular facets on one to three levels (maximum). Disk space was of normal height. The design of this implant allows its use only at levels L3–L4 and L4–L5. We implanted nine patients at the L4–L5 level and four patients at level L3–L4. Postoperative follow-up of the patients was obtained for an average of 3.7 years. All patients reported persistent improvement of symptoms, visual analog scale score, and Oswestry Disability Index score. Functional scores and dynamic radiographic imaging demonstrated the functional efficacy of this new implant, which represents an alternative technique and a new approach to dynamic stabilization of the vertebral column after interventions for spine decompression. The total facet arthroplasty system represents a viable option for dynamic posterior stabilization after spinal decompression. For the observed follow-up, it preserved motion without significant complications or apparent intradisk or adjacent-disk degeneration. PMID:24926203

Vermesan, D; Prejbeanu, R; Daliborca, C Vlad; Haragus, H; Magureanu, M; Marrelli, M; Promenzio, L; Caprio, M; Cagiano, R; Tatullo, M

2014-01-01

287

Improved orthopedic arm joint  

NASA Technical Reports Server (NTRS)

Joint permits smooth and easy movement of disabled arm and is smaller, lighter and less expensive than previous models. Device is interchangeable and may be used on either arm at the shoulder or at the elbow.

Dane, D. H.

1971-01-01

288

Joint Services Electronics Program.  

National Technical Information Service (NTIS)

An annual report of the JSEP (Joint Services Electronics Program) in solid state electronics, quantum electronics, information electronics, control and optimization, and electromagnetic phenomena is presented. Results of the research to date are summarize...

M. Tinkham

1991-01-01

289

Joint Services Electronics Program.  

National Technical Information Service (NTIS)

An annual report of the JSEP (Joint Services Electronics Program) in solid state electronics, quantum electronics, information electronics, control and optimization, and electromagnetic phenomena is presented. Results of the research to date are summarize...

M. Tinkham

1987-01-01

290

Joint Services Electronics Program.  

National Technical Information Service (NTIS)

An annual report of the JSEP (Joint Services Electronic Program) in solid state electronics, quantum electronics, information electronics control and optimization and electromagnetic phenomenon is presented. Results of the research to date are summarized ...

M. Tinkham

1985-01-01

291

JOINT SEMINAR FINAL REPORT  

E-print Network

evolving from the Joint Seminar. - Peer-reviewed publications (journals, contribution to anthologies, working papers, proceedings, etc.) - Non peer-reviewed publications (journals, contribution to anthologies Application guidelines Length Clarity Intelligibility Procedures (submission, review, decision) Advising

Fuchs, Clemens

292

Culture - joint fluid  

MedlinePLUS

Joint fluid culture ... fungi, or viruses grow. This is called a culture. If such microorganisms are detected, other tests may ... is no special preparation needed for the lab culture. For information on preparing for the removal of ...

293

Joint hypermobility syndrome pain  

Microsoft Academic Search

Joint hypermobility syndrome (JHS) was initially defined as the occurrence of musculoskeletal symptoms in the presence of\\u000a joint laxity and hypermobility in otherwise healthy individuals. It is now perceived as a commonly overlooked, underdiagnosed,\\u000a multifaceted, and multisystemic heritable disorder of connective tissue (HDCT), which shares many of the phenotypic features\\u000a of other HDCTs such as Marfan syndrome and Ehlers-Danlos syndrome.

Rodney Grahame

2009-01-01

294

Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie Bar, & Diagonal Brace Joint Detail; Chord, Tie Bar, & Crossbracing Joint Detail - Medora Bridge, Spanning East Fork of White River at State Route 235, Medora, Jackson County, IN

295

High pressure ceramic joint  

DOEpatents

Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures.

Ward, Michael E. (Poway, CA); Harkins, Bruce D. (San Diego, CA)

1993-01-01

296

Role of poly(vinylpyrrolidone) (PVP) and other sterically protecting polymers in selective stabilization of {111} and {100} facets in pentagonally twinned silver nanoparticles.  

PubMed

The role of PVP in the selective formation of pentagonally twinned silver nanoparticle morphologies and the corresponding selective facet stabilization is elucidated. Both for decahedral and pentagonal rod nanoparticles, PVP does not promote specific facet selection but is instrumental in colloidal stabilization and facet preservation through steric protection. PMID:24336687

Murshid, Nimer; Kitaev, Vladimir

2014-02-01

297

Highly reactive {001} facets of TiO2-based composites: synthesis, formation mechanism and characterization  

NASA Astrophysics Data System (ADS)

Titanium dioxide (TiO2) is one of the most widely investigated metal oxides due to its extraordinary surface, electronic and catalytic properties. However, the large band gap of TiO2 and massive recombination of photogenerated electron-hole pairs limit its photocatalytic and photovoltaic efficiency. Therefore, increasing research attention is now being directed towards engineering the surface structure of TiO2 at the most fundamental and atomic level namely morphological control of {001} facets in the range of microscale and nanoscale to fine-tune its physicochemical properties, which could ultimately lead to the optimization of its selectivity and reactivity. The synthesis of {001}-faceted TiO2 is currently one of the most active interdisciplinary research areas and demonstrations of catalytic enhancement are abundant. Modifications such as metal and non-metal doping have also been extensively studied to extend its band gap to the visible light region. This steady progress has demonstrated that TiO2-based composites with {001} facets are playing and will continue to play an indispensable role in the environmental remediation and in the search for clean and renewable energy technologies. This review encompasses the state-of-the-art research activities and latest advancements in the design of highly reactive {001} facet-dominated TiO2via various strategies, including hydrothermal/solvothermal, high temperature gas phase reactions and non-hydrolytic alcoholysis methods. The stabilization of {001} facets using fluorine-containing species and fluorine-free capping agents is also critically discussed in this review. To overcome the large band gap of TiO2 and rapid recombination of photogenerated charge carriers, modifications are carried out to manipulate its electronic band structure, including transition metal doping, noble metal doping, non-metal doping and incorporating graphene as a two-dimensional (2D) catalyst support. The advancements made in these aspects are thoroughly examined, with additional insights related to the charge transfer events for each strategy of the modified-TiO2 composites. Finally, we offer a summary and some invigorating perspectives on the major challenges and new research directions for future exploitation in this emerging frontier, which we hope will advance us to rationally harness the outstanding structural and electronic properties of {001} facets for various environmental and energy-related applications.

Ong, Wee-Jun; Tan, Lling-Lling; Chai, Siang-Piao; Yong, Siek-Ting; Mohamed, Abdul Rahman

2014-01-01

298

A Bright Side, Facet Analysis of Histrionic Personality Disorder: The Relationship Between the HDS Colourful Factor and the NEO-PI-R Facets in a Large Adult Sample.  

PubMed

This study looks at "bright-side," Big Five Personality trait correlates of a "dark-side" Personality Disorder, namely Histrionic Personality Disorder (HPD). More than 5000 British adults completed the Neuroticism Extraversion Openness Personality Inventory-Revised (Costa & McCrae, 1985), which measures the Big Five Personality factors at the Domain (Super Factor) and the Facet (Factor) level, as well as the Hogan Development Survey (HDS; Hogan & Hogan, 2009), which has a measure of HPD, exclusively called "Colourful" in the HDS terminology. Correlation and regression results confirmed many of the associations between these "bright" and "dark" side individual difference variables. The Colourful (HPD) score from the HDS was the criterion variable in all analyses. Colourful individuals are high on Extraversion and Openness, but also Stable and Disagreeable. The Facet analysis identified Assertiveness and Immodesty as particularly characteristic of that type. The study confirmed work on HPD using different population groups and different measures, showing that personality traits are predictable and correlated with various personality disorders. PMID:25280168

Furnham, Adrian

2014-01-01

299

Dissimilar metals joint evaluation  

NASA Technical Reports Server (NTRS)

Dissimilar metals tubular joints between 2219-T851 aluminum alloy and 304L stainless steel were fabricated and tested to evaluate bonding processes. Joints were fabricated by four processes: (1) inertia (friction) weldings, where the metals are spun and forced together to create the weld; (2) explosive welding, where the metals are impacted together at high velocity; (3) co-extrusion, where the metals are extruded in contact at high temperature to promote diffusion; and (4) swaging, where residual stresses in the metals after a stretching operation maintain forced contact in mutual shear areas. Fifteen joints of each type were prepared and evaluated in a 6.35 cm (2.50 in.) O.D. size, with 0.32 cm (0.13 in.) wall thickness, and 7.6 cm (3.0 in) total length. The joints were tested to evaluate their ability to withstand pressure cycle, thermal cycle, galvanic corrosion and burst tests. Leakage tests and other non-destructive test techniques were used to evaluate the behavior of the joints, and the microstructure of the bond areas was analyzed.

Wakefield, M. E.; Apodaca, L. E.

1974-01-01

300

Distal radioulnar joint injuries  

PubMed Central

Distal radioulnar joint is a trochoid joint relatively new in evolution. Along with proximal radioulnar joint, forearm bones and interosseous membrane, it allows pronosupination and load transmission across the wrist. Injuries around distal radioulnar joint are not uncommon, and are usually associated with distal radius fractures,fractures of the ulnar styloid and with the eponymous Galeazzi or Essex_Lopresti fractures. The injury can be purely involving the soft tissue especially the triangular fibrocartilage or the radioulnar ligaments. The patients usually present with ulnar sided wrist pain, features of instability, or restriction of rotation. Difficulty in carrying loads in the hand is a major constraint for these patients. Thorough clinical examination to localize point of tenderness and appropriate provocative tests help in diagnosis. Radiology and MRI are extremely useful, while arthroscopy is the gold standard for evaluation. The treatment protocols are continuously evolving and range from conservative, arthroscopic to open surgical methods. Isolated dislocation are uncommon. Basal fractures of the ulnar styloid tend to make the joint unstable and may require operative intervention. Chronic instability requires reconstruction of the stabilizing ligaments to avoid onset of arthritis. Prosthetic replacement in arthritis is gaining acceptance in the management of arthritis. PMID:23162140

Thomas, Binu P; Sreekanth, Raveendran

2012-01-01

301

Periprosthetic Joint Infections  

PubMed Central

Implantation of joint prostheses is becoming increasingly common, especially for the hip and knee. Infection is considered to be the most devastating of prosthesis-related complications, leading to prolonged hospitalization, repeated surgical intervention, and even definitive loss of the implant. The main risk factors to periprosthetic joint infections (PJIs) are advanced age, malnutrition, obesity, diabetes mellitus, HIV infection at an advanced stage, presence of distant infectious foci, and antecedents of arthroscopy or infection in previous arthroplasty. Joint prostheses can become infected through three different routes: direct implantation, hematogenic infection, and reactivation of latent infection. Gram-positive bacteria predominate in cases of PJI, mainly Staphylococcus aureus and Staphylococcus epidermidis. PJIs present characteristic signs that can be divided into acute and chronic manifestations. The main imaging method used in diagnosing joint prosthesis infections is X-ray. Computed tomography (CT) scan may assist in distinguishing between septic and aseptic loosening. Three-phase bone scintigraphy using technetium has high sensitivity, but low specificity. Positron emission tomography using fluorodeoxyglucose (FDG-PET) presents very divergent results in the literature. Definitive diagnosis of infection should be made by isolating the microorganism through cultures on material obtained from joint fluid puncturing, surgical wound secretions, surgical debridement procedures, or sonication fluid. Success in treating PJI depends on extensive surgical debridement and adequate and effective antibiotic therapy. Treatment in two stages using a spacer is recommended for most chronic infections in arthroplasty cases. Treatment in a single procedure is appropriate in carefully selected cases. PMID:24023542

Lima, Ana Lucia L.; Oliveira, Priscila R.; Carvalho, Vladimir C.; Saconi, Eduardo S.; Cabrita, Henrique B.; Rodrigues, Marcelo B.

2013-01-01

302

It's in the mix: psychological distress differs between combinations of alexithymic facets  

PubMed Central

Alexithymia is a personality trait characterized by difficulties in identifying, describing, and communicating one's emotions. The aim of the present study is to examine the usefulness of a typological approach considering the interaction between distinct alexithymic features within a population of high-alexithymic German adults (N = 217). Latent profile analysis (LPA) was employed to test for possible underlying profiles. A 3-profile solution showed the best fit: The profiles can be described as (1) “low”: lower load on all facets of alexithymia, (2) “mixed”: specific problems on identifying emotions, and (3) “high”: higher load on all facets of alexithymia. Moreover, this study tested how these profiles differed in psychological distress. “Mixed” profile, with specific problems on identifying emotions showed the highest levels of psychological distress. The present study suggests the importance of a specific combination of alexithymic features, rather than total alexithymia scores, as a risk factor for psychological distress.

Alkan Härtwig, Elif; Crayen, Claudia; Heuser, Isabella; Eid, Michael

2014-01-01

303

Associations among childhood abuse and psychopathy facets in male sexual offenders.  

PubMed

In the search for causes of psychopathy, the literature historically focuses on biological and temperamental differences. In comparison, this literature overshadows that of psychosocial risk factors for the development of psychopathy, namely childhood maltreatment. The current study examines the association between specific types of maltreatment (i.e., physical, emotional, sexual abuse, neglect) and PCL-R total and facet scores among a sample of 223 adult men convicted of sexual offenses and evaluated for civil commitment. Results indicate that childhood sexual abuse is associated with higher PCL-R total scores and facets tapping a grandiose and manipulative interpersonal style, impulsive-irresponsible lifestyle, and antisocial behavior. Also, childhood physical abuse and neglect are associated with antisocial behavior. Emotional detachment traits of psychopathy (i.e., lack of empathy, shallow affect) are associated with childhood neglect for child molesters, although rapists scored higher on these traits irrespective of neglect history. Theoretical and practical implications are discussed. PMID:22448862

Graham, Nicole; Kimonis, Eva R; Wasserman, Adam L; Kline, Suzonne M

2012-01-01

304

Brief report: relationships between facets of impulsivity and borderline personality features.  

PubMed

Relationships between specific borderline personality disorder (BPD) features and facets of impulsivity (negative and positive urgency, premeditation, perseverance, and sensation seeking) were examined in a sample of 227 undergraduate students, oversampled to include many with elevations on a measure of borderline features. Most facets of impulsivity were positively correlated with borderline features, except for sensation seeking, which showed a mixed pattern of relationships with specific BPD features. In regression models, negative urgency was the strongest predictor of all BPD features scales, including affective instability, identity problems, negative relationships, and self-harm. Premeditation, positive urgency, and sensation seeking demonstrated incremental validity over negative urgency in predicting some BPD features; however, significant beta weights were negative for sensation seeking, suggesting that it may be protective or adaptive for BPD, unlike other forms of impulsivity. This study provides evidence for variation in how types of impulsivity contribute to different BPD features and demonstrates the importance of examining BPD features on the subscale level. PMID:22984862

Peters, Jessica R; Upton, Brian T; Baer, Ruth A

2013-08-01

305

The dimensionality of self-esteem: II. Hierarchical facet model for revised measurement scales  

Microsoft Academic Search

A hierarchical facet model of self-esteem proposed by R. J. Shavelson et al was partially tested in a previous study by J. S. Fleming and W. A. Watts . Their 3 factors, which were labeled Self-Regard, Social Confidence, and School Abilities, corresponded to 3 of the 4 dimensions posited by Shavelson et al. Predictions of other individual-difference variables from these

James S. Fleming; Barbara E. Courtney

1984-01-01

306

Mass transport, faceting and behavior of dislocations in GaN  

SciTech Connect

The behavior of threading dislocations during mass transport of GaN was investigated in detail by transmission electron microscopy. Mass transport occurred at the surface. Therefore, growing species are supplied from the in-plane direction. The behavior of threading dislocations was found to be strongly affected by the mass transport process as well as the high crystallographic anisotropy of the surface energy of the facets particular to GaN.

Nitta, S.; Kashima, T.; Kariya, M.; Yukawa, Y.; Yamaguchi, S.; Amano, H.; Akasaki, I.

2000-07-01

307

First results from core-edge parallel composition in the FACETS project  

SciTech Connect

FACETS (Framework Application for Core-Edge Transport Simulations), now in its second year, has achieved its first coupled core-edge transport simulations. In the process, a number of accompanying accomplishments were achieved. These include a new parallel core component, a new wall component, improvements in edge and source components, and the framework for coupling all of this together. These accomplishments were a result of an interdisciplinary collaboration among computational physics, computer scientists, and applied mathematicians on the team.

Cary, John R. [Tech-X Corporation; Candy, Jeff [General Atomics; Cohen, Ronald H. [Lawrence Livermore National Laboratory (LLNL); Krasheninnikov, Sergei [University of California, San Diego; McCune, Douglas [Princeton Plasma Physics Laboratory (PPPL); Estep, Donald J [Colorado State University, Fort Collins; Larson, Jay [Argonne National Laboratory (ANL); Malony, Allen [University of Oregon; Pankin, A. [Lehigh University, Bethlehem, PA; Worley, Patrick H [ORNL; Carlsson, Johann [Tech-X Corporation; Hakim, A H [Tech-X Corporation; Hamill, P [Tech-X Corporation; Kruger, Scott [Tech-X Corporation; Miah, Mahmood [Tech-X Corporation; Muzsala, S [Tech-X Corporation; Pletzer, Alexander [Tech-X Corporation; Shasharina, Svetlana [Tech-X Corporation; Wade-Stein, D [Tech-X Corporation; Wang, N [Tech-X Corporation; Balay, Satish [Argonne National Laboratory (ANL); McInnes, Lois [Argonne National Laboratory (ANL); Zhang, Hong [Argonne National Laboratory (ANL); Casper, T. A. [Lawrence Livermore National Laboratory (LLNL); Diachin, Lori [Lawrence Livermore National Laboratory (LLNL); Epperly, Thomas [Lawrence Livermore National Laboratory (LLNL); Rognlien, T. D. [Lawrence Livermore National Laboratory (LLNL); Fahey, Mark R [ORNL; Cobb, John W [ORNL; Morris, A [University of Oregon; Shende, Sameer [University of Oregon; Hammett, Greg [Princeton Plasma Physics Laboratory (PPPL); Indireshkumar, K [Tech-X Corporation; Stotler, D. [Princeton Plasma Physics Laboratory (PPPL); Pigarov, A [University of California, San Diego

2008-01-01

308

First results from core-edge parallel composition in the FACETS project.  

SciTech Connect

FACETS (Framework Application for Core-Edge Transport Simulations), now in its second year, has achieved its first coupled core-edge transport simulations. In the process, a number of accompanying accomplishments were achieved. These include a new parallel core component, a new wall component, improvements in edge and source components, and the framework for coupling all of this together. These accomplishments were a result of an interdisciplinary collaboration among computational physics, computer scientists, and applied mathematicians on the team.

Cary, J. R.; Candy, J.; Cohen, R. H.; Krasheninnikov, S.; McCune, D. C.; Estep, D. J.; Larson, J.; Malony, A. D.; Pankin, A.; Worley, P. H.; Carlsson, J. A.; Hakim, A. H.; Hamill, P.; Kruger, S.; Miah, M.; Muzsala, S.; Pletzer, A.; Shasharina, S.; Wade-Stein, D.; Wang, N.; Balay, S.; McInnes, L.; Zhang, H.; Casper, T.; Diachin, L. (Mathematics and Computer Science); (Tech-X Corp.); (General Atomics); (LLNL); (Univ. of California at San Diego); (Princeton Plasma Physics Lab.); (Colorado State Univ.); (ParaTools Inc.); (Lehigh Univ.); (ORNL)

2008-01-01

309

An improved algorithm for facet-based infrared small target detection  

NASA Astrophysics Data System (ADS)

Infrared small target detection is an important research area of computer vision and often a key technique in Infrared Search and Track (IRST) systems. Many algorithms have been reported for this purpose. The facet-based method is one of novel algorithms and is shown as robust and efficient, but it does not perform well in target preservation. The method cannot detect peripheral pixel of target, which causes information loss of target intensity distribution and affects post processing of detection, such as target tracking and recognition. In this paper an improved algorithm is developed for solving this shortcoming. The detection behavior of the facet model is further analyzed. Small target is surrounded by background, so local image edge that indicates target contour can be represented by zero-crossings of the second partial derivatives. The improved algorithm uses facet model to fit local intensity surface and detect potential targets using extremum theory, then the zero-crossings of the second partial derivatives of the fitting function in each potential target's neighborhood are found and the pixels inside the zero-crossing contour are restored to the potential target. In experiments involving typical infrared images target intensity distribution information is well preserved by proposed algorithm and its execution time is also acceptable.

Yi, Kejia; Deng, Tingquan; Guan, Jing; Wang, Gongze; Chen, Hao

2011-11-01

310

Treating personality-relationship transactions with respect: narrow facets, advanced models, and extended time frames.  

PubMed

Contrary to premises of dynamic transactionism, most studies investigating personality-relationship transaction only found personality effects on relationships but failed to find effects of relationship experiences on personality development. The current study reconsiders this issue in 3 ways. First, alongside the broad Big Five characteristics (Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness), specific personality facets were considered to make comparisons with relationships more symmetric. Second, a recent extension of latent change modeling was applied allowing for a theoretically more appropriate model that compensates for the shortcomings of traditionally used cross-lagged panel or growth curve models. Third, personality-relationship transaction was studied from young adulthood to midlife using a 15-year longitudinal study with 654 German adults. Results showed patterns of personality-relationship transaction with the romantic partner, friends, kin, and other interaction partners. Specifically, the development of Neuroticism, Agreeableness, and Conscientiousness and their facets was closely interacting with partner and friend relationships, underlining the importance of these relationships for personality maturation during the adult years. We conclude that relationship effects have often been underestimated in previous studies. They are not bound to specific developmental periods, such as emerging adulthood, but their detection depends on the modeling approach and the analysis level (broad dimensions vs. facets). Relationship effects are most likely to occur in relationships that reflect self-selected life styles and circumstances. PMID:25090133

Mund, Marcus; Neyer, Franz J

2014-08-01

311

Ga-polar GaN nanocolumn arrays with semipolar faceted tips  

NASA Astrophysics Data System (ADS)

Selective area growth of GaN nanocolumns (NCs) by molecular beam epitaxy on laser ablated pre-patterned GaN(0001) templates is shown to provide regular arrays of Ga-polar NCs. The Ga diffusion-assisted growth mechanism is analyzed and the experiments suggest that the effective growth conditions vary with the height of the NCs due to Ga diffusion on the mask and the NC sidewalls, ranging from N-rich up to stoichiometry. The obtained morphology with semipolar facets at the tip is discussed within the framework of equilibrium thermodynamics, which provides a consistent picture also for the growth of N-polar NCs with flat tips. The structural investigation reveals almost defect-free semipolar \\{1\\overline {1}02\\} GaN facets at the top of the NCs, which is known to be a promising way of producing templates for nanoscale semipolar GaN-based heterostructures. Almost no polarization discontinuity is expected for InxGa1-xN/GaN interfaces on such facets.

Urban, A.; Malindretos, J.; Klein-Wiele, J.-H.; Simon, P.; Rizzi, A.

2013-05-01

312

Acute sciatica and progressive neurological deficit secondary to facet synovial cysts: A report of two cases.  

PubMed Central

Objective: To describe two patients with lumbar facet synovial cysts causing sciatica and progressive neurological deficit. Clinical Features: A 52-year-old female with bilateral sciatica and a neurological deficit that progressed to a foot drop; and a 54-year-old female with worsening sciatica and progressive calf weakness were seen at a major tertiary care centre. Diagnostic imaging studies revealed the presence of spinal nerve root impingement by large facet synovial cysts. Interventions and Outcomes: Activity modification, gabapentinoid and non-steroidal anti-inflammatory medications were unsuccessful in ameliorating either patient’s symptoms. One patient had been receiving ongoing lumbar chiropractic spinal manipulative therapy despite the onset of a progressive neurological deficit. Both patients eventually required surgery to remove the cyst and decompress the affected spinal nerve roots. Conclusion: Patients with acute sciatica who develop a progressive neurological deficit while under care, require prompt referral for axial imaging and surgical consultation. Primary care spine clinicians need to be aware of lumbar facet synovial cysts as a possible cause of acute sciatica and the associated increased risk of the patient developing a progressive neurological deficit. PMID:22997467

Arthur, Brian; Lewkonia, Peter; Quon, Jeffrey A.; Street, John; Bishop, Paul B.

2012-01-01

313

Facets of career satisfaction for women physicians in the United States: a systematic review.  

PubMed

Women make up a growing proportion of the physician workforce, and their career satisfaction may affect their health. The authors hypothesized that many facets adversely affecting career satisfaction in women physicians were extrinsic, therefore, preventable or modifiable. The authors conducted a systematic review of the literature in English published through February 2010 to examine facets of career satisfaction of U.S. women physicians. The authors used the women physician AND job satisfaction OR career satisfaction Medical Subject Headings (MeSH) terms, and reviewed bibliographies of key articles to ensure inclusion of relevant studies. The authors used the "Strengthening the Reporting of Observation Studies in Epidemiology" quality tool. Of an initial 1,000 studies, only 30 met the inclusion criteria. Facets reported most frequently to influence career satisfaction for women physicians were income/prestige, practice characteristics, and personal/family characteristics. Overall, career satisfaction for women and men physicians was 73.4% (range = 56.4% to 90%) and 73.2% (range = 59% to 90%), respectively. When compared with men, women physicians were more concerned with perceived lack of time for relationships with patients, colleagues, and family; less satisfied with mentoring relationships and support from all sources; and less satisfied with career-advancement opportunities, recognition, and salary. Career satisfaction can affect health, as well as health and safety of patients. Many factors adversely affecting career satisfaction for women physicians are extrinsic and, therefore, modifiable. PMID:22591235

Rizvi, Rabab; Raymer, Lindsay; Kunik, Mark; Fisher, Joslyn

2012-01-01

314

Coherent, focus-corrected imaging of optical fiber facets using a single-pixel detector.  

PubMed

A novel imaging technique that produces accurate amplitude and phase images of an optical fiber facet using only a phase-only liquid-crystal on silicon (LCOS) spatial light modulator (SLM) and a single-pixel detector is presented. The system can take images in two orthogonal polarizations and so provides a powerful tool for modal characterization of multimode fibers, which is of increasing importance due to their burgeoning use in telecommunications and medical applications. This technique first uses a simulated annealing algorithm to compute a hologram that collects light from a small region of the fiber facet. Next, the fiber facet is automatically brought into focus using adaptive aberration correction on the SLM. Finally, a common-path interferometer is created using the SLM, and the phase of the optical field at each pixel is determined. Finally, high-definition amplitude and phase images of a ring-core refractive index fiber are presented as a proof-of-principle demonstration of the technique. PMID:25361149

Gordon, George S D; Feng, Feng; Kang, Qiongyue; Jung, Yongmin; Sahu, Jayanta; Wilkinson, Timothy

2014-10-15

315

(100) facets of ?-Al2O3: the active surfaces for alcohol dehydration reactions  

SciTech Connect

Temperature programmed desorption (TPD) of ethanol, and methanol dehydration reaction were studied on ?-Al2O3 in order to identify the catalytic active sites for alcohol dehydration reactions. Two high temperature (> 473 K) desorption features were observed following ethanol adsorption. Samples calcined at T?473 K displayed a desorption feature in the 523-533 K temperature range, while those calcined at T ? 673 K showed a single desorption feature at 498 K. The switch from the high to low temperature ethanol desorption correlated well with the dehydroxylation of the (100) facets of ?-Al2O3 that was predicted at 550 K DFT calculations. Theoretical DFT simulations of the mechanism of dehydration. on clean and hydroxylated ?-Al2O3(100) surfaces, find that a concerted elimination of ethylene from an ethanol molecule chemisorbed at an Al3+ pentacoordinated site is the rate limiting step for catalytic cycle on both surfaces. Furthermore, titration of the pentacoordinate Al3+ sites on the (100) facets of ?-Al2O3 by BaO completely turned off the methanol dehydration reaction activity. These results unambiguously demonstrate that only the (100) facets on ?-Al2O3 are the catalytic active surfaces for alcohol dehydration.

Kwak, Ja Hun; Mei, Donghai; Peden, Charles HF; Rousseau, Roger J.; Szanyi, Janos

2011-05-01

316

A Structural Study of Facet and Off-Facet Parts of Rare-Earth Garnets, Gd 3Sc 2Al 3O 12, Gd 3Sc 2Ga 3O 12, and La 3Lu 2Ga 3O 12  

NASA Astrophysics Data System (ADS)

The crystal structures of facet and off-facet parts of rare-earth garnets Gd 3Sc 2Al 3O 12 (GSAG), Gd 3Sc 2Ga 3O 12 (GSGG), and La 3Lu 2Ga 3O 12 (LLGG) have been refined with the single-crystal X-ray diffraction method. The crystals are cubic with the space group Ia3 d, containing eight formula units in a unit cell. The final weighted reliability factors are 0.014, 0.017, and 0.020 for 1786, 2318, and 2331 reflections of the facet parts of GSAG, GSGG, and LLGG, respectively, and 0.014, 0.017, and 0.019 for 2143, 2190, and 2420 reflections of the off-facet parts of the respective crystals. The bond lengths between the tetrahedral cations ( T) and the oxygen atoms in GSAG and GSGG as well as those between the dodecahedral cations ( M viii) and oxygen atoms in all the examined crystals are in accordance with the sums of ionic radii both in facet and off-facet parts, whereas the octahedral cations ( M vi) in all the crystals and the tetrahedral cation in LLGG have bond lengths longer than the sums of the ionic radii. A cation replacement at the T sites was not observed, whereas the M vi and M viii sites were revealed to be partly replaced by cations with smaller ionic radii.

Yamazaki, Satoru; Marumo, Fumiyuki; Tanaka, Kiyoaki; Morikawa, Hideki; Kodama, Nobuhiro; Kitamura, Kenji; Miyazawa, Yasuto

1994-01-01

317

Evolving flexible joint morphologies  

Microsoft Academic Search

Transferring virtual robotic designs into physical robots has become possible with the development of 3D printers. Accurately simulating the performance of real robots in a virtual environment requires modeling a variety of conditions, including the physical composition of the robots themselves. In this paper, we investigate how modeling material flexibility through the use of a passive joint affects the resulting

Jared M. Moore; Philip K. McKinley

2012-01-01

318

Joint Durability The problem?  

E-print Network

;Interfacial Zone? #12;Walking a Cliff Edge · In situ air content · w/cm · Saturation · Salts #12;Base Permeability #12;An Example #12;So · Water has to be prevented from saturating the concrete · Prevent water from ponding in the joint · Prevent water from penetrating from the base · Permeability of the concrete

319

Sustainable molecular oxygen activation with oxygen vacancies on the {001} facets of BiOCl nanosheets under solar light.  

PubMed

We demonstrate that oxygen vacancies on the {001} facets of BiOCl nanosheets can more sustainably activate molecular oxygen for organic pollutant removal under solar light than the TiO2 counterparts. The oxygen vacancies on the {001} facets of BiOCl nanosheets are effectively refreshed by UV light, and are also responsible for the efficient utilization of visible light to activate molecular oxygen, accounting for their long term stability and high efficiency. PMID:25329732

Li, Hao; Shi, Jingu; Zhao, Kun; Zhang, Lizhi

2014-11-01

320

Fundamental-transverse-mode high-power AlGaInP laser diode with windows grown on facets  

Microsoft Academic Search

The window-grown-on-facet (WGF) structure was first implemented to high power fundamental-transverse-mode AlGaInP lasers so as to reduce facet degradation. A kink-free CW maximum output power of 295 mW, about twice as much as for an identical non-WGF laser, was achieved at the wavelength of 680 mm; and fundamental-transverse-mode operation up to 150 mW was confirmed. Front and rear window layers

Masanori Watanabe; Kentaro Tani; Kosei Takahashi; Kazuaki Sasaki; Hiroshi Nakatsu; Masahiro Hosoda; Sadayoshi Matsui; Osamu Yamamoto; Saburo Yamamoto

1995-01-01

321

Faceted Ranking in Collaborative Tagging Systems - Efficient Algorithms for Ranking Users based on a Set of Tags  

Microsoft Academic Search

Multimedia content is uploaded, tagged and recommended by users of collaborative systems such as YouTube and Flickr. These systems can be represented as tagged-graphs, where nodes correspond to users and tagged- links to recommendations. In this paper we analyze the online computation of user-rankings associated to a set of tags, called a facet. A simple approach to faceted ranking is

José Ignacio Orlicki; Pablo Ignacio Fierens; J. Ignacio Alvarez-hamelin

2009-01-01

322

Joints in a Cornstarch Analog  

NSDL National Science Digital Library

Joints are very important to problems in applied geology (fluid flow, slope stability), but three-dimensional exposures of simple joint sets are not readily accessible from my campus. I developed this exercise based on the experiments of Miller (2001) to give students hands-on practice describing and interpreting joints. For the exercise, I prepare a cornstarch-water mixture a few days in advance and pour it into plastic petri dishes. I add a "flaw" to each dish (typically a small pebble). As the cornstarch dries, vertical joints develop. In class, each group of 3-4 students is provided a petri dish of desiccated cornstarch. Students are asked to draw a map of the joints, paying particular attention to intersection angles. (The joints curve to intersect at 90 degrees.) They determine relative ages of the joints using abutting relationships. (Typically 3-6 generations of joints.) Students next dissect the sample and describe the surface textures of the larger joints and the location of the flaw. The cornstarch produces beautiful plumose structure (hackles). Students then interpret the joint propagation direction from the surface textures, and note the origin of the joint. (Typically, a first- or second-generation joint initiates at the flaw.) Students discuss the role of flaws in the initiation of joints in their groups.

Crider, Juliet

323

Morphotectonic evolution of triangular facets and wine-glass valleys in the Noakoh anticline, Zagros, Iran: Implications for active tectonics  

NASA Astrophysics Data System (ADS)

The Noakoh anticline is located in Kermanshah province and is part of the Simply Folded Belt of Zagros. Boundaries of 97 triangular facets and 67 wine-glass (W-G) valleys, which formed on anticline limbs, were delineated using Quickbird satellite imagery. The strata dip (D), area (A), base length (BL), topographic slope (S) of facets, the maximum width (M), outlet width (O) and ratio of maximum width to outlet width (W index) of W-G valleys were analysed in detail. Noakoh anticline was subdivided into 9 tectonic zones on the basis of dip, topographic slopes and width of limbs. Results show that there are strong positive correlations between means of D-BL and S-BL pairs. Poor positive correlations exist between means of D-A and S-A pairs. Among W-G valley metrics, the W index has strong relations with D and S parameters. Based on the results, steep facets with long bases and well developed W-G valleys with narrow outlets and wide upper parts are associated with more rotated limbs having steep slopes. Facets on the northeastern slope have more forest cover, micro-organism activity, karstic features and soil cover, whereas facets on relatively drier southwestern slope are characterized by physical weathering processes and minor karstic landforms. This study demonstrates that, apart from tectonic activity as a major control on the morphometry of facets and valleys, climate and slope aspect have also acted as secondary factors on the development of the studied landforms.

Bahrami, Shahram

2012-07-01

324

Spontaneous resolution of symptoms associated with a facet synovial cyst in an adult female - a case report  

PubMed Central

Background: Facet cysts are implicated in neural compression in the lumbar spine. Surgery is the definitive treatment for symptomatic facet cysts since the failure rate for conservative treatment is quite high; however, the role of physical/manual medicine practitioners in the management of symptomatic facet cysts has not been well explored. This case report will add to the body of evidence of spontaneous resolution of symptoms associated with facet cysts in the chiropractic literature. Case: A 58 year old female presented with acute low back and right leg pain which she attributed to a series of exercise classes that involved frequent foot stomping. Physical examination did not elicit any objective evidence of radiculopathy but MRI and CT scans revealed a facet cyst impinging on the right L5 nerve root. Injections and surgery were recommended; however, the patient’s radicular symptoms completely resolved after three months without surgical intervention. Summary: There is currently a paucity of data in the literature regarding the chiropractor’s role in the management of symptomatic facet cysts. The case presented here has added to this literature and possible areas for future research have been explored. PMID:23483069

Ngo, Trung; Decina, Philip; Hsu, William

2013-01-01

325

MIGRATION DES JOINTS DE GRAINS LA MIGRATION DES JOINTS INTERGRANULAIRES  

E-print Network

MIGRATION DES JOINTS DE GRAINS LA MIGRATION DES JOINTS INTERGRANULAIRES O. DIMITROV Centre d nombre de faits fondamentaux concernant la migration des joints de grains sont brièvement rappelés considérant les forces qui provoquent ou qui freinent la migration. L'évolution des modèles proposés pour

Boyer, Edmond

326

Decoupled Control of Flexure Jointed Hexapods Using Estimated Joint Space  

E-print Network

1 Decoupled Control of Flexure Jointed Hexapods Using Estimated Joint Space Mass-Inertia Matrix of flexure jointed hexapods (or Stewart platforms), a new decoupling method is proposed. The new decoupling. Keywords Vibration isolation, decoupling control, Stewart platform, precision robots, hexapod, symmetric

Chen, Yixin

327

Shoulder Joint For Protective Suit  

NASA Technical Reports Server (NTRS)

Shoulder joint allows full range of natural motion: wearer senses little or no resisting force or torque. Developed for space suit, joint offers advantages in protective garments for underwater work, firefighting, or cleanup of hazardous materials.

Kosmo, Joseph J.; Smallcombe, Richard D.

1994-01-01

328

Rolling contact orthopaedic joint design  

E-print Network

Arthroplasty, the practice of rebuilding diseased biological joints using engineering materials, is often used to treat severe arthritis of the knee and hip. Prosthetic joints have been created in a "biomimetic" manner to ...

Slocum, Alexander Henry, Jr

2013-01-01

329

Double slotted socket spherical joint  

DOEpatents

A new class of spherical joints is disclosed. These spherical joints are capable of extremely large angular displacements (full cone angles in excess of 270.degree.), while exhibiting no singularities or dead spots in their range of motion. These joints can improve or simplify a wide range of mechanical devices.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2001-05-22

330

Phase 1 Program Joint Report  

NASA Technical Reports Server (NTRS)

This report consists of inputs from each of the Phase I Program Joint Working Groups. The Working Groups were tasked to describe the organizational structure and work processes that they used during the program, joint accomplishments, lessons learned, and applications to the International Space Station Program. This report is a top-level joint reference document that contains information of interest to both countries.

Nield, George C. (Editor); Vorobiev, Pavel Mikhailovich (Editor)

1999-01-01

331

The Challenges of Joint Attention  

Microsoft Academic Search

This paper discusses the concept of joint at- tention and the dierent skills underlying its development. We argue that joint attention is much more than gaze following or simul- taneous looking because it implies a shared intentional relation to the world. The current state-of-the-art in robotic and computational models of the dierent prerequisites of joint attention is discussed in relation

Frederic Kaplan; Verena V. Hafner

2004-01-01

332

Anatase TiO2 nanocrystals with exposed {001} facets on graphene sheets via molecular grafting for enhanced photocatalytic activity  

NASA Astrophysics Data System (ADS)

Owing to their extensive practical applications and fundamental importance, the controllable synthesis of well-faceted anatase TiO2 crystal with high percentage of reactive facets has attracted increasing attention. Here, nano-sized anatase TiO2 sheets mainly dominated by {001} facets had been prepared on graphene sheets by using a facile solvothermal synthetic route. The percentage of {001} facets in TiO2 nanosheets was calculated to be ca. 64%. The morphologies, structural properties, growth procedures and photocatalytic activities of the resultant TiO2/graphene nanocomposites were investigated. In comparison with commercial P25 and pure TiO2 nanosheets, the composite exhibited significant improvement in photocatalytic degradation of the azo dye Rhodamine B under visible light irradiation. The enhancement of photocatalytic activity and stability was attributed to the effective charge anti-recombination of graphene and the high catalytic activity of {001} facets.Owing to their extensive practical applications and fundamental importance, the controllable synthesis of well-faceted anatase TiO2 crystal with high percentage of reactive facets has attracted increasing attention. Here, nano-sized anatase TiO2 sheets mainly dominated by {001} facets had been prepared on graphene sheets by using a facile solvothermal synthetic route. The percentage of {001} facets in TiO2 nanosheets was calculated to be ca. 64%. The morphologies, structural properties, growth procedures and photocatalytic activities of the resultant TiO2/graphene nanocomposites were investigated. In comparison with commercial P25 and pure TiO2 nanosheets, the composite exhibited significant improvement in photocatalytic degradation of the azo dye Rhodamine B under visible light irradiation. The enhancement of photocatalytic activity and stability was attributed to the effective charge anti-recombination of graphene and the high catalytic activity of {001} facets. Electronic supplementary information (ESI) available: Calculational details; UV-vis diffuse reflectance spectra; photocatalytic decomposition data; and detailed data of pure TiO2 nanosheets. See DOI: 10.1039/c1nr11411e

Sun, Lei; Zhao, Zhenlu; Zhou, Yunchun; Liu, Li

2012-01-01

333

Joint hypermobility syndrome pain.  

PubMed

Joint hypermobility syndrome (JHS) was initially defined as the occurrence of musculoskeletal symptoms in the presence of joint laxity and hypermobility in otherwise healthy individuals. It is now perceived as a commonly overlooked, underdiagnosed, multifaceted, and multisystemic heritable disorder of connective tissue (HDCT), which shares many of the phenotypic features of other HDCTs such as Marfan syndrome and Ehlers-Danlos syndrome. Whereas the additional flexibility can confer benefits in terms of mobility and agility, adverse effects of tissue laxity and fragility can give rise to clinical consequences that resonate far beyond the confines of the musculoskeletal system. There is hardly a clinical specialty to be found that is not touched in one way or another by JHS. Over the past decade, it has become evident that of all the complications that may arise in JHS, chronic pain is arguably the most menacing and difficult to treat. PMID:19889283

Grahame, Rodney

2009-12-01

334

Joint Venture Marketing  

Microsoft Academic Search

Joint venture marketing links a for profit organization with a non-profit organization for their mutual benefit. Since American Express launched its 1981 Statue of Liberty\\/Ellis Island campaign, the strategy has proliferated among all types of health care organizations, manufacturers and even financial and educational institutions. With the successes have come concerns about non-profits having to compromise their integrity, the elimination

Nora Ganin Barnes

1991-01-01

335

Jointly Poisson processes  

Microsoft Academic Search

What constitutes jointly Poisson processes remains an unresolved issue. This\\u000areport reviews the current state of the theory and indicates how the accepted\\u000abut unproven model equals that resulting from the small time-interval limit of\\u000ajointly Bernoulli processes. One intriguing consequence of these models is that\\u000ajointly Poisson processes can only be positively correlated as measured by the\\u000acorrelation coefficient

Don H. Johnson; Ilan N. Goodman

2009-01-01

336

Prosthetic elbow joint  

NASA Technical Reports Server (NTRS)

An artificial, manually positionable elbow joint for use in an upper extremity, above-elbow, prosthetic is described. The prosthesis provides a locking feature that is easily controlled by the wearer. The instant elbow joint is very strong and durable enough to withstand the repeated heavy loadings encountered by a wearer who works in an industrial, construction, farming, or similar environment. The elbow joint of the present invention comprises a turntable, a frame, a forearm, and a locking assembly. The frame generally includes a housing for the locking assembly and two protruding ears. The forearm includes an elongated beam having a cup-shaped cylindrical member at one end and a locking wheel having a plurality of holes along a circular arc on its other end with a central bore for pivotal attachment to the protruding ears of the frame. The locking assembly includes a collar having a central opening with a plurality of internal grooves, a plurality of internal cam members each having a chamfered surface at one end and a V-shaped slot at its other end; an elongated locking pin having a crown wheel with cam surfaces and locking lugs secured thereto; two coiled compression springs; and a flexible filament attached to one end of the elongated locking pin and extending from the locking assembly for extending and retracting the locking pin into the holes in the locking wheel to permit selective adjustment of the forearm relative to the frame. In use, the turntable is affixed to the upper arm part of the prosthetic in the conventional manner, and the cup-shaped cylindrical member on one end of the forearm is affixed to the forearm piece of the prosthetic in the conventional manner. The elbow joint is easily adjusted and locked between maximum flex and extended positions.

Weddendorf, Bruce C. (inventor)

1994-01-01

337

Formation of tough composite joints  

SciTech Connect

Joints which exhibit tough fracture behavior were formed in a composite with a Si/SiC matrix reinforced with Textron SCS-6 fibers with either boron nitride or silicon nitride fiber coatings. In composites with BN coatings fibers were aligned uniaxially, while composites with Si{sub 3}N{sub 4}-coated fibers had a 0/90{degree} architecture. Lapped joints (joints with overlapping fingers) were necessary to obtain tough behavior. Geometrical requirements necessary to avoid brittle joint failure have been proposed. Joints with a simple overlap geometry (only a few fingers) would have to be very long in order to prevent brittle failure. Typical failure in these joints is caused by a crack propagating along the interfaces between the joint fingers. Joints of the same overall length, but with geometry changed to be symmetric about the joint centerline and with an extra shear surface exhibited tough fractures accompanied with extensive fiber pullout. The initial matrix cracking of these joints was relatively low because cracks propagated easily through the ends of the fingers. Joints with an optimized stepped sawtooth geometry produced composite-like failures with the stress/strain curves containing an elastic region followed by a region of rising stress with an increase of strain. Increasing the fiber/matrix interfacial strength from 9 to 25 MPa, by changing the fiber coating, increased matrix cracking and ultimate strength of the composite significantly. The best joints had matrix cracking stress and ultimate strength of 138 and 240 MPa, respectively. Joint failure was preceded by multiple matrix cracking in the entire composite. The high strength of the joints will permit building of structures containing joints with only a minor reduction of design stresses.

Brun, M.K. [GE Corporate Research and Development, Schenectady, NY (United States)

1997-05-01

338

True Upward Adatom Diffusion and Faceting in fcc metal (110) homoepitaxy  

NASA Astrophysics Data System (ADS)

Recent studies of Ge heteroepitaxial growth on Si(100) have led to the discovery of an intriguing bimodal growth mode, characterised by the coexistence of smaller hut islands and much larger domes. Efforts aimed to understand the microscopic mechanisms involved have so far been focused predominantly on the role of the thermodynamic driving force associated with stress. Here we report on the observation of bimodal growth in an entirely unexpected system, homoepitaxial growth of Al on Al(110), characterised by the coexistence of smaller mound islands and tenfold taller nanocrystals with well-defined facets (the huts). Whereas the formation of the mounds results from kinetic roughening due to slow downward adatom diffusion at step edges, the formation of the huts demands atom extraction from the mounds and true upward diffusion of such atoms through the (110) terraces onto the facets serving as kinetic traps. A critical role in the faceting instability, is found to be played by the surprisingly low activation barriers for adatom ascent at step edges and island corners(F.Buatier de Mongeot, W.Zhu, A.Molle, R.Buzio, C.Boragno, U. Valbusa, E.G.Wang, Z.Zhang, Physical Review Letters 91, 016102 (2003)),(Physics News Update, AIP, Number 643,2003 Mountain climbing atoms (http://www.aip.org/enews/physnews/2003/split/643-2.html)). Extensions of the results to other related systems will be presented, in particular for the fcc(110) class of substrates Cu, Pb, Ag as well as for heteroepitaxyal systems like Co/Cu(110).

Buatier de Mongeot, Francesco

2004-03-01

339

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2011 CFR

...Transportation 4 2011-10-01 2011-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2011-10-01

340

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

341

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2012 CFR

...Transportation 4 2012-10-01 2012-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2012-10-01

342

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2010 CFR

...Transportation 4 2010-10-01 2010-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2010-10-01

343

Synthesis of pt-ni alloy nanocrystals with high-index facets and enhanced electrocatalytic properties.  

PubMed

The shape-controlled synthesis of multicomponent metal nanocrystals (NCs) bounded by high-index facets (HIFs) is of significant importance in the design and synthesis of high-activity catalysts. We report herein the preparation of Pt-Ni alloy NCs by tuning their shape from concave-nanocubic (CNC) to nanocubic and hexoctahedral (HOH). Owing to the synergy of the HIFs and the electronic effect of the Pt-Ni alloy, the as-prepared CNC and HOH Pt-Ni alloy NCs exhibited excellent catalytic properties for the electrooxidation of methanol and formic acid, as well as for the oxygen reduction reaction (ORR). PMID:25195668

Xu, Xiling; Zhang, Xin; Sun, Hui; Yang, Ying; Dai, Xiaoping; Gao, Jinsen; Li, Xueyong; Zhang, Pengfang; Wang, Hong-Hui; Yu, Neng-Fei; Sun, Shi-Gang

2014-11-10

344

Reflections on the four facets of symmetry: how physics exemplifies rational thinking  

NASA Astrophysics Data System (ADS)

In contemporary theoretical physics, the powerful notion of symmetry stands for a web of intricate meanings among which I identify four clusters associated with the notion of transformation, comprehension, invariance and projection. While their interrelations are examined closely these four facets of symmetry are scrutinised one after the other in great detail. This decomposition allows us to carefully examine the multiple different roles symmetry plays in many places in physics. Furthermore, some connections with other disciplines like neurobiology, epistemology, cognitive sciences and, not least, philosophy are proposed in an attempt to show that symmetry can be an organising principle also in these fields.

Mouchet, Amaury

2013-12-01

345

Latent structure of facets of alcohol reinforcement from a behavioral economic demand curve  

Microsoft Academic Search

Rationale  Behavioral economic demand curves are quantitative representations of the relationship between consumption of a drug and its\\u000a cost. Demand curves provide a multidimensional assessment of reinforcement, but the relationships among the various indices\\u000a of reinforcement have been largely unstudied.\\u000a \\u000a \\u000a \\u000a Objectives  The objective of the study is to use exploratory factor analysis to examine the underlying factor structure of the facets\\u000a of

James MacKillop; James G. Murphy; Jennifer W. Tidey; Christopher W. Kahler; Lara A. Ray; Warren K. Bickel

2009-01-01

346

Zinc oxide micro-spheres with faceted surfaces produced by laser ablation of zinc targets  

NASA Astrophysics Data System (ADS)

We report the fabrication of ZnO micro-spheres using high-power laser ablation of Zn metal in the presence of oxygen gas background without use of any catalysts or additives. The centre-symmetric geometrical structures of ZnO micro-spheres exhibit clear pentagonal and hexagonal facets with different sizes. A discussion of the growth mechanisms based on a model of subsurface micro-explosion boiling followed by laser-surface sintering of assembled particles has been proposed to explain the formation of the ZnO micro-spheres.

Chen, Ming; Liu, Xiangdong; Liu, Yuehua; Zhao, Mingwen

2012-05-01

347

Laboratory characterization of rock joints  

SciTech Connect

A laboratory characterization of the Apache Leap tuff joints under cyclic pseudostatic and dynamic loads has been undertaken to obtain a better understanding of dynamic joint shear behavior and to generate a complete data set that can be used for validation of existing rock-joint models. Study has indicated that available methods for determining joint roughness coefficient (JRC) significantly underestimate the roughness coefficient of the Apache Leap tuff joints, that will lead to an underestimation of the joint shear strength. The results of the direct shear tests have indicated that both under cyclic pseudostatic and dynamic loadings the joint resistance upon reverse shearing is smaller than that of forward shearing and the joint dilation resulting from forward shearing recovers during reverse shearing. Within the range of variation of shearing velocity used in these tests, the shearing velocity effect on rock-joint behavior seems to be minor, and no noticeable effect on the peak joint shear strength and the joint shear strength for the reverse shearing is observed.

Hsiung, S.M.; Kana, D.D.; Ahola, M.P.; Chowdhury, A.H.; Ghosh, A. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1994-05-01

348

New plastic joints for plastic orthoses.  

PubMed

Plastic joints for orthoses have more advantages than metal joints. They are lightweight, noiseless comfortable to use, rust proof, corrosion free, and radiolucent. Two types of plastic joints were developed by the authors, one for the ankle joint and the other for the knee joint, elbow joint or hip joint. Polypropylene was chosen as the joint material because of its appropriate flexibility and toughness. PMID:7079105

Watanabe, H; Kutsuna, T; Morinaga, H; Okabe, T

1982-04-01

349

Cellular aspects of the development of diarthrodial joints and articular cartilage.  

PubMed Central

There have been many reports on the histological development of mammalian diarthrodial or synovial joints. While these are useful for comparative purposes, they tell us little of the cellular basis of joint morphogenesis which must underlie a number of morphogenetic defects. The process of joint morphogenesis is complex and can be subdivided into a number of facets and this report will focus on 2 of them. First, the process of joint cavitation in the chick metatarsophalangeal joint, where we propose that the selective secretion of hyaluronan into the presumptive cavity plays a central role. Secondly, the development of articular cartilage where we have used the South American opossum Monodelphis domestica as a model for mammalian development. Like most marsupials, the young are born at a much earlier developmental stage than eutherian mammals. Using antibodies which detect proliferating chondrocytes and those synthesising insulin-like growth factors 1 and 2 and insulin-like growth factor 1 binding protein, we report that the majority of growth (as assessed by these indicators) appears appositional. Images Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 PMID:7928634

Archer, C W; Morrison, H; Pitsillides, A A

1994-01-01

350

Minimally Invasive Sacroiliac Joint Fusion: One-Year Outcomes in 40 Patients  

PubMed Central

Background. SI joint pain is difficult to diagnose due to overlapping symptoms of the lumbar spine, and until recently, treatment options have been limited. The purpose of this retrospective study is to report on the safety and effectiveness of MIS SI joint arthrodesis using a series of triangular, porous plasma coated implants in patients refractory to conservative care. Methods. We report on the first 40 consecutive patients with one-year follow-up data that underwent MIS SI joint fusion with the iFuse Implant System (SI-BONE, Inc., San Jose, CA) by a single surgeon. Medical charts were reviewed for demographics, perioperative metrics, complications, pain scores, and satisfaction. Results. Mean age was 58 years (range 30–81) and 75% of patients were female. Postoperative complications were minimal and included transient trochanteric bursitis (5%), facet joint pain (20%), and new low back pain (2.5%). There were no reoperations at one year. Mean pain score improved from 8.7 (1.5 SD) at baseline to 0.9 (1.6) at 12 months, a 7.8-point improvement (P < .001). Patient satisfaction was very high. Conclusions. The results of this case series reveal that MIS SI joint fusion using the iFuse Implant System is a safe and effective treatment option in carefully selected patients. PMID:23997957

2013-01-01

351

Parallel Syndromes: Two Dimensions of Narcissism and the Facets of Psychopathic Personality in Criminally-Involved Individuals  

PubMed Central

Little research has examined different dimensions of narcissism that may parallel psychopathy facets in criminally-involved individuals. The present study examined the pattern of relationships between grandiose and vulnerable narcissism, assessed using the Narcissistic Personality Inventory-16 and the Hypersensitive Narcissism Scale, respectively, and the four facets of psychopathy (interpersonal, affective, lifestyle, and antisocial) assessed via the Psychopathy Checklist: Screening Version (PCL:SV). As predicted, grandiose and vulnerable narcissism showed differential relationships to psychopathy facets, with grandiose narcissism relating positively to the interpersonal facet of psychopathy and vulnerable narcissism relating positively to the lifestyle facet of psychopathy. Paralleling existing psychopathy research, vulnerable narcissism showed stronger associations than grandiose narcissism to 1) other forms of psychopathology, including internalizing and substance use disorders, and 2) self- and other-directed aggression, measured using the Life History of Aggression and the Forms of Aggression Questionnaire. Grandiose narcissism was nonetheless associated with social dysfunction marked by a manipulative and deceitful interpersonal style and unprovoked aggression. Potentially important implications for uncovering etiological pathways and developing treatment interventions for these disorders in externalizing adults are discussed. PMID:22448731

2012-01-01

352

Enabling multi-faceted measures of success for protected area management in Trinidad and Tobago.  

PubMed

A key challenge has been to define and measure "success" in managing protected areas. A case study was conducted of efforts to evaluate the new protected area management system in Trinidad and Tobago using a participatory approach. The aim of the case study was to (1) examine whether stakeholder involvement better captures the multi-faceted nature of success and (2) identify the role and influence of various stakeholder groups in this process. An holistic and systematic framework was developed with stakeholder input that facilitated the integration of expert and lay knowledge, a broad emphasis on ecological, socio-economic, and institutional aspects, and the use of both quantitative and qualitative data allowing the evaluation to capture the multi-faceted nature and impacts of protected area management. Input from primary stakeholders, such as local communities, was critical as they have a high stake in protected area outcomes. Secondary and external stakeholders, including government agencies, non-governmental organizations, academia and the private sector, were also important in providing valuable technical assistance and serving as mediators. However, a lack of consensus over priorities, politics, and limited stakeholder capacity and data access pose significant barriers to engaging stakeholders to effectively measure the management success of protected areas. PMID:21555042

Granderson, Ainka A

2011-08-01

353

Multi-faceted Rasch measurement and bias patterns in EFL writing performance assessment.  

PubMed

This study applied multi-faceted Rasch measurement to examine rater bias in the assessment of essays written by college students learning English as a foreign language. Four raters who had received different academic training from four distinctive disciplines applied a six-category rating scale to analytically rate essays on an argumentative topic and on a descriptive topic. FACETS, a Rasch computer program, was utilized to pinpoint bias patterns by analyzing the rater-topic, rater-category, and topic-category interactions. Results showed: argumentative essays were rated more severely than were descriptive essays; the linguistics-major rater was the most lenient rater, while the literature-major rater was the severest one; and the category of language use received the severest ratings, whereas content was given the most lenient ratings. The severity hierarchies for raters, essay topics, and rating categories suggested that raters' academic training and their perceptions of the importance of categories were associated with their bias patterns. Implications for rater training are discussed. PMID:23833876

He, Tung-Hsien; Gou, Wen Johnny; Chien, Ya-Chen; Chen, I-Shan Jenny; Chang, Shan-Mao

2013-04-01

354

Pseudocapacitive hausmannite nanoparticles with (101) facets: synthesis, characterization, and charge-transfer mechanism.  

PubMed

Hausmannite Mn3 O4 octahedral nanoparticles of 18.3 ± 7.0 nm with (101) facets have been prepared by an oxygen-mediated growth. The electrochemical properties of the Mn3 O4 particles as pseudocapacitive cathode materials were characterized both in half-cells and in button-cells. The Mn3 O4 nanoparticles exhibited a high mass-specific capacitance of 261 F g(-1), which was calculated from cyclic voltammetry analyses, and a capacitive retention of 78% after 10,000 galvanostatic charge-discharge cycles. The charge-transfer mechanisms of the Mn3 O4 nanoparticles were further studied by using synchrotron-based in situ X-ray absorption near edge spectroscopy and XRD. Both measurements showed concurrently that throughout the potential window of 0-1.2?V (vs. Ag/AgCl), a stable spinel structure of Mn3 O4 remained, and a reversible electrochemical conversion between tetrahedral [Mn(II) O4 ] and octahedral [Mn(III) O6 ] units accounted for the redox activity. Density functional theory calculations further corroborated this mechanism by confirming the enhanced redox stability afforded by the abundant and exposed (101) facets of Mn3 O4 octahedra. PMID:23650213

Yeager, Matthew P; Du, Wenxin; Wang, Qi; Deskins, N Aaron; Sullivan, Matthew; Bishop, Brendan; Su, Dong; Xu, Wenqian; Senanayake, Sanjaya D; Si, Rui; Hanson, Jonathan; Teng, Xiaowei

2013-10-01

355

Self-assembly of faceted particles triggered by a moving ice front.  

PubMed

The possibility to align and organize faceted particles in the bulk offers intriguing possibilities for the design and discovery of materials and architectures exhibiting novel functional properties. The growth of ice crystals can be used to trigger the self-assembly of large, anisotropic particles and consequently to obtain three-dimensional porous materials of large dimensions in a limited amount of time. These mechanisms have not been explored so far due to the difficulty to experimentally investigate these systems. Here we elucidate the self-assembly mechanisms of faceted particles driven by ice growth by a combination of X-ray holotomography and discrete element modeling, providing insights into both the dynamics of self-assembly and their final packing. The encapsulation of particles is the result of a delicate balance between the force exerted by the percolating network of concentrated particles and the force exerted by the moving interface. We illustrate the benefits of such self-assembly for thermal management composite materials. PMID:24432973

Bouville, Florian; Maire, Eric; Deville, Sylvain

2014-07-29

356

Highly exposed {001} facets of titanium dioxide modified with reduced graphene oxide for dopamine sensing  

NASA Astrophysics Data System (ADS)

Titanium dioxide (TiO2) with highly exposed {001} facets was synthesized through a facile solvo-thermal method and its surface was decorated by using reduced graphene oxide (rGO) sheets. The morphology and chemical composition of the prepared rGO/TiO2 {001} nanocomposite were examined by using suitable characterization techniques. The rGO/TiO2 {001} nanocomposite was used to modify glassy carbon electrode (GCE), which showed higher electrocatalytic activity towards the oxidation of dopamine (DA) and ascorbic acid (AA), when compared to unmodified GCE. The differential pulse voltammetric studies revealed good sensitivity and selectivity nature of the rGO/TiO2 {001} nanocomposite modified GCE for the detection of DA in the presence of AA. The modified GCE exhibited a low electrochemical detection limit of 6 ?M over the linear range of 2-60 ?M. Overall, this work provides a simple platform for the development of GCE modified with rGO/TiO2 {001} nanocomposite with highly exposed {001} facets for potential electrochemical sensing applications.

How, Gregory Thien Soon; Pandikumar, Alagarsamy; Ming, Huang Nay; Ngee, Lim Hong

2014-05-01

357

Delaminated graphene at silicon carbide facets: atomic scale imaging and spectroscopy.  

PubMed

Atomic-resolution structural and spectroscopic characterization techniques (scanning transmission electron microscopy and electron energy loss spectroscopy) are combined with nanoscale electrical measurements (conductive atomic force microscopy) to study at the atomic scale the properties of graphene grown epitaxially through the controlled graphitization of a hexagonal SiC(0001) substrate by high temperature annealing. This growth technique is known to result in a pronounced electron-doping (?10(13) cm(-2)) of graphene, which is thought to originate from an interface carbon buffer layer strongly bound to the substrate. The scanning transmission electron microscopy analysis, carried out at an energy below the knock-on threshold for carbon to ensure no damage is imparted to the film by the electron beam, demonstrates that the buffer layer present on the planar SiC(0001) face delaminates from it on the (112n) facets of SiC surface steps. In addition, electron energy loss spectroscopy reveals that the delaminated layer has a similar electronic configuration to purely sp2-hybridized graphene. These observations are used to explain the local increase of the graphene sheet resistance measured around the surface steps by conductive atomic force microscopy, which we suggest is due to significantly lower substrate-induced doping and a resonant scattering mechanism at the step regions. A first-principles-calibrated theoretical model is proposed to explain the structural instability of the buffer layer on the SiC facets and the resulting delamination. PMID:23530467

Nicotra, Giuseppe; Ramasse, Quentin M; Deretzis, Ioannis; La Magna, Antonino; Spinella, Corrado; Giannazzo, Filippo

2013-04-23

358

Joint hypermobility syndrome.  

PubMed

Although perceived as a rare condition, joint hypermobility syndrome is common. Its prevalence in rheumatology clinics is extremely high. Early estimates suggest that it may be the most common of all rheumatologic conditions. The problem lies in the general lack of awareness of the syndrome, its means of recognition, and the resultant failure to diagnose it correctly when present. It is a worldwide problem. This article provides an overview of hypermobility and hypermobility syndrome, stressing its multisystemic nature and the negative impact that it may have on quality of life, with particular reference to gastrointestinal involvement. PMID:23597972

Fikree, Asma; Aziz, Qasim; Grahame, Rodney

2013-05-01

359

Joint services electronics program  

NASA Astrophysics Data System (ADS)

This report is the Annual Progress Report for Joint Services Electronics Program Contract N00014-84-K-0327 for the Faculty of the Edward L. Ginzton Laboratory of Stanford University (S.E. Harris, Director). The report includes contributions on four units: (1) (Unit 85-1: Processor D.M. Bloom) Picosecond Optical Measurements; (2) Unit 85-2: Processor R.L. Byer) Optical and Nonlinear Optical Studies of Single Crystal Fibers; (3) (Unit 85-3: Professor G.S. Kino) Very High Frequency Signal Processing Techniques; (4) Unit 85-4: Professor C.F. Quate) Metal-Vacuum-Metal Tunneling or scanned Tunneling Microscopy.

Harris, S. E.; Bloom, D. M.; Byer, R. L.; Kino, G. S.; Quate, C. F.

1985-07-01

360

Broad bandwidth or high fidelity? Evidence from the structure of genetic and environmental effects on the facets of the five factor model.  

PubMed

The Five Factor Model of personality is well-established at the phenotypic level, but much less is known about the coherence of the genetic and environmental influences within each personality domain. Univariate behavioral genetic analyses have consistently found the influence of additive genes and nonshared environment on multiple personality facets, but the extent to which genetic and environmental influences on specific facets reflect more general influences on higher order factors is less clear. We applied a multivariate quantitative-genetic approach to scores on the CPI-Big Five facets for 490 monozygotic and 317 dizygotic twins who took part in the National Merit Twin Study. Our results revealed a complex genetic structure for facets composing all five factors, with both domain-general and facet-specific genetic and environmental influences. For three of the Big Five domains, models that required common genetic and environmental influences on each facet to occur by way of effects on a higher order trait did not fit as well as models allowing for common genetic and environmental effects to act directly on the facets. These results add to the growing body of literature indicating that important variation in personality occurs at the facet level which may be overshadowed by aggregating to the trait level. Research at the facet level, rather than the factor level, is likely to have pragmatic advantages in future research on the genetics of personality. PMID:22695681

Briley, Daniel A; Tucker-Drob, Elliot M

2012-09-01

361

Jointly Sponsored Research Program  

SciTech Connect

U.S. Department of Energy (DOE) Cooperative Agreement DE-FC26-98FT40321 funded through the Office of Fossil Energy and administered at the National Energy Technology Laboratory (NETL) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy & Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying highly efficient, nonpolluting energy systems that meet the nation's requirements for clean fuels, chemicals, and electricity in the 21st century. The EERC in partnership with its nonfederal partners jointly performed 131 JSRP projects for which the total DOE cost share was $22,716,634 (38%) and the nonfederal share was $36,776,573 (62%). Summaries of these projects are presented in this report for six program areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, and (6) advanced materials. The work performed under this agreement addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration; near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources.

Everett A. Sondreal; John G. Hendrikson; Thomas A. Erickson

2009-03-31

362

Joint collaborative technology experiment  

NASA Astrophysics Data System (ADS)

Use of unmanned systems is rapidly growing within the military and civilian sectors in a variety of roles including reconnaissance, surveillance, explosive ordinance disposal (EOD), and force-protection and perimeter security. As utilization of these systems grows at an ever increasing rate, the need for unmanned systems teaming and inter-system collaboration becomes apparent. Collaboration provides a means of enhancing individual system capabilities through relevant data exchange that contributes to cooperative behaviors between systems and enables new capabilities not possible if the systems operate independently. A collaborative networked approach to development holds the promise of adding mission capability while simultaneously reducing the workload of system operators. The Joint Collaborative Technology Experiment (JCTE) joins individual technology development efforts within the Air Force, Navy, and Army to demonstrate the potential benefits of interoperable multiple system collaboration in a force-protection application. JCTE participants are the Air Force Research Laboratory, Materials and Manufacturing Directorate, Airbase Technologies Division, Force Protection Branch (AFRL/RXQF); the Army Aviation and Missile Research, Development, and Engineering Center Software Engineering Directorate (AMRDEC SED); and the Space and Naval Warfare Systems Center - Pacific (SSC Pacific) Unmanned Systems Branch operating with funding provided by the Joint Ground Robotics Enterprise (JGRE). This paper will describe the efforts to date in system development by the three partner organizations, development of collaborative behaviors and experimentation in the force-protection application, results and lessons learned at a technical demonstration, simulation results, and a path forward for future work.

Wills, Michael; Ciccimaro, Donny; Yee, See; Denewiler, Thomas; Stroumtsos, Nicholas; Messamore, John; Brown, Rodney; Skibba, Brian; Clapp, Daniel; Wit, Jeff; Shirts, Randy J.; Dion, Gary N.; Anselmo, Gary S.

2009-05-01

363

Metal to ceramic sealed joint  

DOEpatents

A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

1991-01-01

364

One-dimensional and (001) facetted nanostructured TiO2 photoanodes for dye-sensitized solar cells.  

PubMed

As one of the most important components in dye-sensitized solar cells (DSCs), photoanode materials have attracted massive interest and been greatly developed through the efforts of various research institutions in recent years. Photoanode materials not only provide a large surface for the sensitizer to favor charge separation, but also conduct the electrons to the collection electrode. In recent years, one-dimensional (1D) nanostructures (nanotubes (NT), nanowires (NW) and nanorods(NR)), which offer direct pathways for electron transport, and nanostructures (nanosheets (NS) and nanoparticles (NP)) with (001) crystal facets which possess higher surface energies have been widely employed as photoanode materials. In this review, the progress of 1D nanostructures and those with (001) crystal facets, as well as their photovoltaic performance in DSCs will be discussed briefly. Further efforts are needed to provide theoretical research for 1D and (001) facet nanostructured TiO2 and to improve DSC performances based on these photoanodes. PMID:23574952

Lin, Hong; Wang, Xiao; Hao, Feng

2013-01-01

365

Formation of micro- and nano-striations at (211)A facets during wet etching of InP in HCl  

NASA Astrophysics Data System (ADS)

It is generally observed that the anisotropic wet etching of InP crystal in HCl-based etchants leads to the spontaneous formation of nano-sized striations at certain side facets of patterned objects. It is the consequence of mask edge fluctuation linked with the specific dissolution mechanism of InP in HCl. This paper reports on the formation of striations at (211)A-related facets of [01¯1]-oriented mesa patterns in (100) InP during etching in 3HCl:1H 3PO 4. It is shown that if artificial fluctuation is introduced in the form of regular corrugations along [01¯1]-oriented mask pattern edges, it is possible to form uniform regularly-spaced micro-sized or nano-sized sharp-edged striations in the (211)A-related facets. The formation of such "artificial" striations is investigated using SEM and AFM.

Eliáš, P.; Šoltýs, J.; Kosti?, I.

2004-07-01

366

Synthesis of rhodium concave tetrahedrons by collectively manipulating the reduction kinetics, facet-selective capping, and surface diffusion.  

PubMed

This paper describes a facile synthesis of Rh tetrahedrons with concave side faces by collectively manipulating the reaction kinetics, facet-selective capping, and surface diffusion of atoms. Specifically, a combination of Na3RhCl6, triethylene glycol, l-ascorbic acid, and citric acid provides the right conditions for generating the concave tetrahedrons. After the formation of small Rh tetrahedral seeds through self-nucleation, the subsequently generated Rh atoms were selectively deposited onto the corner sites to generate Rh tetrapods. At the same time, the deposited atoms could diffuse from the corners to edges to generate concave side faces because the diffusion to face sites was restrained by the citric acid adsorbed on the {111} facets. This study offers deep insight into the growth mechanism involved the formation of noble-metal nanocrystals with concave surfaces. The Rh concave tetrahedrons were encased by a mix of {111} and {110} facets, showing great potential for catalytic applications. PMID:24215542

Xie, Shuifen; Zhang, Hui; Lu, Ning; Jin, Mingshang; Wang, Jinguo; Kim, Moon J; Xie, Zhaoxiong; Xia, Younan

2013-01-01

367

Application of combined EBSD and 3D-SEM technique on crystallographic facet analysis of steel at low temperature.  

PubMed

Electron backscatter diffraction has been increasingly used to identify the crystallographic planes and orientation of cleavage facets with respect to the rolling direction in fracture surfaces. The crystallographic indices of cleavage planes can be determined either directly from the fracture surface or indirectly from metallographic sections perpendicular to the plane of the fracture surface. A combination of electron backscatter diffraction and 3D scanning electron microscopy imaging technique has been modified to determine crystallographic facet orientations. The main purpose of this work has been to identify the macroscopic crystallographic orientations of cleavage facets in the fracture surfaces of weld heat affected zones in a well-known steel fractured at low temperatures. The material used for the work was an American Petroleum Institute (API) X80 grade steel developed for applications at low temperatures, and typical heat affected zone microstructures were obtained by carrying out weld thermal simulation. The fracture toughness was measured at different temperatures (0°C, -30°C, -60°C and -90°C) by using Crack Tip Opening Displacement testing. Fracture surfaces and changes in microstructure were analyzed by scanning electron microscopy and light microscopy. Crystallographic orientations were identified by electron backscatter diffraction, indirectly from a polished section perpendicular to the major fracture surface of the samples. Computer assisted 3D imaging was used to measure the angles between the cleavage facets and the adjacent polished surface, and then these angles were combined with electron backscatter diffraction measurements to determine the macroscopic crystallographic planes of the facets. The crystallographic indices of the macroscopic cleavage facet planes were identified to be {100}, {110}, {211} and {310} at all temperatures. PMID:23692572

Mohseni, P; Solberg, J K; Karlsen, M; Akselsen, O M; Ostby, E

2013-07-01

368

Rotary Joint for Heat Transfer  

NASA Technical Reports Server (NTRS)

Rotary joint exchanges heat between two heat pipes - one rotating and one stationary. Joint accommodates varying heat loads with little temperature drop across interface. According to concept, heat pipe enters center of disklike stationary section of joint. There, wicks in central artery of heat pipe separate into multiple strands that lead to concentric channels on rotaryinterface side of stationary disk. Thin layer of liquid sodium/potassium alloy carries heat from one member of rotary joint to other. Liquid conducts heat efficiently while permitting relative motion between members. Polypropylene rings contain liquid without interfering with rotation.

Shauback, R.

1986-01-01

369

Specific features of the evolution of electrolytic copper microcrystals with inhibition of the growth of low-energy facets  

NASA Astrophysics Data System (ADS)

Experimental evidence for the possibility of controllably transforming the habit of copper microcrystals formed by electrodeposition has been presented. Selective evolution of microcrystal facets with a specific crystallographic orientation has been performed by a premeditated change in the chemical composition of a standard sulfuric electrolyte. The experiments have proved the existence of a small particle with icosidodecahedral morphology as an intermediate stage of the evolution of the small particle from an icosahedron to a dodecahedron and demonstrated some elastic-energy relaxation channels associated with inhibition of the growth of low-energy facets of electrolytic copper microcrystals.

Yasnikov, I. S.; Denisova, D. A.

2013-03-01

370

Public health assessment for Facet Enterprises, Elmira, Chemung County, New York, Region 2. Cerclis No. NYD073675514. Final report  

SciTech Connect

The Facet Enterprises, Inc. site in the Village of Elmira and Town of Horseheads, Chemung County, New York was listed on the National Priorities List (NPL) in 1981. The Facet facility is one of several industrial facilities and landfills in the Newtown Valley shown to have contributed to contamination of the Newtown Creek Aquifer with trichloroethene (TCE). Groundwater seepage has been documented in three homes. Additionally, two potential human exposure pathways need further investigation. To evaluate these potential exposure pathways, samples of surface soils from yards and samples of groundwater seepage in the basements of 6 to 10 homes immediately south of the site on Route 14 and Eighteenth Streets, will be collected.

Not Available

1994-03-16

371

Facet-embedded thin-film III-V edge-emitting lasers integrated with SU-8 waveguides on silicon.  

PubMed

A thin-film InGaAs/GaAs edge-emitting single-quantum-well laser has been integrated with a tapered multimode SU-8 waveguide onto an Si substrate. The SU-8 waveguide is passively aligned to the laser using mask-based photolithography, mimicking electrical interconnection in Si complementary metal-oxide semiconductor, and overlaps one facet of the thin-film laser for coupling power from the laser to the waveguide. Injected threshold current densities of 260A/cm(2) are measured with the reduced reflectivity of the embedded laser facet while improving single mode coupling efficiency, which is theoretically simulated to be 77%. PMID:20967104

Palit, Sabarni; Kirch, Jeremy; Huang, Mengyuan; Mawst, Luke; Jokerst, Nan Marie

2010-10-15

372

[Prosthetics of metacarpophalangeal joints].  

PubMed

Only a few of the large number of implants developed during the last decades for replacement of the metacarpophalangeal (MCP) joint have proven to be reliable. The rates of loosening and mechanical failure of almost all types of constrained prostheses are so high that their use cannot be recommended at present. For more than 40 years silicone arthroplasty according to Swanson has been regarded as the gold standard in the prosthetic replacement of the MCP joint. In long-term studies this device provided good pain relief and a lasting correction of preoperative ulnar deviation. The degree of patient satisfaction continues to be high after more than 10 years. With the NeuFlex spacer, a modification of the original Swanson implant, a better range of motion and a reduction of wear-related problems is expected. In this study the results of 130 NeuFlex spacers after a mean time of 3.6 years were examined and 82% of the patients were completely pain free. The mobility of the joints improved from 40 degrees preoperatively to 54 degrees after 3.6 years. Radiologically periprosthetic erosions or osteolyses were seen in approximately 15% of implants. A minimal sinking of the stems developed in 24%, a massive one in 6% and 13% of the spacers were broken. Thus the use of the NeuFlex implant resulted in a better range of motion compared to the Swanson spacer, but the problem of radiological appearance remained unchanged. For unlinked prostheses sufficient soft tissue stability is mandatory as well as wear-resistant surface materials. The pyrocarbon prosthesis according to Beckenbaugh is the only implant for which long-term results are available. In a prospective study we evaluated 28 Ascension pyrocarbon prostheses with a mean follow-up of 4 years. Stability was not found to be a problem. Subjective results were satisfactory, the range of motion remained unchanged, however 46% of prosthesis stems exhibited radiolucent seams, 7 prostheses (25%) were rated as loose and 5 of those had to be replaced by a silicone implant. Use of the implant was abandoned, as it was unreliable regarding bony fixation. There are promising concepts in some new prostheses but independent data are still lacking. PMID:17717677

Hilker, A; Miehlke, R-K; Schmidt, K

2007-09-01

373

Healthy Joints Matter What exactly is a joint?  

E-print Network

diet, avoiding injuries, and getting plenty of sleep will help you stay healthy and keep your joints be triggered by an injury to a joint, such as a knee injury that damages the cartilage. · Rheumatoid arthritis arthritis is a term often used to describe arthritis in children. Children can develop almost all types

Baker, Chris I.

374

Passive Ball Capture Joint  

NASA Technical Reports Server (NTRS)

A passive ball capture joint has a sleeve with a plurality of bores distributed about a circumference thereof and formed therethrough at an acute angle relative to the sleeve's longitudinal axis. A spring-loaded retainer is slidingly fitted in each bore and is biased such that, if allowed, will extend at least partially into the sleeve to retain a ball therein. A ring, rotatably mounted about the bores, has an interior wall defining a plurality of shaped races that bear against the spring-loaded retainers. A mechanized rotational force producer is coupled to the ring. The ring can be rotated from a first position (that presses the retainers into the sleeve to lock the ball in place) to a second position (that allows the retainers to springback out of the sleeve to release the ball).

Cloyd, Richard A. (Inventor); Bryan, Thomas C. (Inventor)

2003-01-01

375

Design of a Shape Memory Alloy deployment hinge for reflector facets  

NASA Technical Reports Server (NTRS)

A design concept for a Shape Memory Alloy (SMA) actuated hinge mechanism for deploying segmented facet-type reflector surfaces on antenna truss structures is presented. The mechanism uses nitinol, a nickel-titanium shape memory alloy, as a displacement-force micro-actuator. An electrical current is used to resistively heat a 'plastically' elongated SMA actuator wire, causing it to contract in response to a thermally-induced phase transformation. The resulting tension creates a moment, imparting rotary motion between two adjacent panels. Mechanical stops are designed into the device to limit its range of motion and to establish positioning accuracy at the termination of deployment. The concept and its operation are discussed in detail, and an analytical dynamic simulation model is presented. The model has been used to perform nondimensionalized parametric design studies.

Anders, W. S.; Rogers, C. A.

1991-01-01

376

Microfluidic refractometer with integrated optical fibers and end-facet transmission gratings.  

PubMed

We demonstrated a microfluidic refractometer with an integrated high resolution transmission grating. This grating was fabricated by UV nanoimprinting on the end facet of a multimode optical fiber which was then placed in the plan of the microfluidic device and perpendicular to a microchannel. On the opposite side of the channel, three cleaved optical fibers were added for the light collection of the zeroth and the +/- first diffraction orders. A white light source was used for illumination and the diffraction beams were analyzed with a minispectrometer. The transmission grating was merged in the sample solution of the channel, providing a refractive index-dependent diffraction efficiency. As expected, the diffraction efficiency of the zeroth and the +/- first diffraction orders are different, both being reliable for the refractive index monitoring. Such a white source and multibeam diffraction analysis also allows monitoring the sample absorption or fluorescence, thereby providing a more accurate determination of the sample refraction index. PMID:20192481

Lei, Lei; Li, Hao; Shi, Jian; Chen, Yong

2010-02-01

377

Nanopillar array on a fiber facet for highly sensitive surface-enhanced Raman scattering.  

PubMed

A highly-sensitive optical fiber surface-enhanced Raman scattering (SERS) sensor has been developed by interference lithography. While one facet of the optical fiber is patterned with silver-coated nanopillar array as a SERS platform, the other end of the probe is used, in a remote end detection, to couple the excitation laser into the fiber and send the SERS signal to the spectrometer. SERS performance of the probe is characterized using trans-1,2-bis(4-pyridyl)-ethylene (BPE) monolayer and an enhancement factor of 1.2 × 10(7) can be achieved by focusing the laser directly onto the nanopillar array (front end detection). We also demonstrate that this probe can be used for in situ remote sensing of toluene vapor by the remote end detection. Such a fiber SERS probe shows great potential for molecular detection in various sensing applications. PMID:23187247

Yang, Xuan; Ileri, Nazar; Larson, Cindy C; Carlson, Thomas C; Britten, Jerald A; Chang, Allan S P; Gu, Claire; Bond, Tiziana C

2012-10-22

378

Mechanism of interactions between CMC binder and Si single crystal facets.  

PubMed

Interactions of the active material particles with the binder are crucial in tailoring the properties of composite electrodes used in lithium-ion batteries. The dependency of the protonation degree of the carboxyl group in the carboxymethyl cellulose (CMC) structure on the pH value of the preparation solution was investigated by Fourier transform infrared spectroscopy (FTIR). Three different distinctive chemical states of CMC binder were chosen (protonated, deprotonated, and half-half), and their interactions with different silicon single crystal facets were investigated. The different Si surface orientations display distinct differences of strength of interactions with the CMC binder. The CMC/Si adhesion forces in solution and Si wettability of the silicon are also strongly dependent on the protonation degree of the CMC. This work provides an insight into the nature of these interactions, which determine the electrochemical performance of silicon composite electrodes. PMID:25109709

Vogl, U S; Das, P K; Weber, A Z; Winter, M; Kostecki, R; Lux, S F

2014-09-01

379

The many facets of the Tim-Tipin protein families' roles in chromosome biology.  

PubMed

Failures in DNA replication are a potent force for driving genome instability. The proteins which form the replisome, the DNA replication machinery, play a fundamental role in preventing replicative catastrophes. The Tim (TIMELESS/TIMEOUT) and Tipin proteins are two conserved replisome associated proteins which have functions in preventing replication fork collapse and replicative checkpoint signalling in response to factors which slow the progression of the replisome. Intriguingly, TIMELESS family members have been implicated in the regulation of the biological clock, giving a tantalising pointer to a possible link between DNA replication and circadian rhythm control. Here we report on our current understanding of the many facets of these protein families in maintaining genome stability and replication checkpoint control. PMID:20139726

McFarlane, Ramsay J; Mian, Saira; Dalgaard, Jacob Z

2010-02-15

380

An interface facet driven Rayleigh instability in high-aspect-ratio bimetallic nanolayered composites  

NASA Astrophysics Data System (ADS)

One limitation hindering the structural and electrical applications of nanostructured metals is the loss of their nanostructure and strength under elevated temperatures. Nanostructured metals often have grain structures that contain a high density of triple junctions, where thermally induced instabilities commonly initiate. Prior work has resulted in fabrication of nanolayered two-phase composites that possess high-aspect ratio grains, a scarcity of triple junctions, and a thermally stable microstructure. In this work, transmission electron microscopy is used to investigate how these composites could eventually breakdown during heating. We reveal an unconventional thermal instability mechanism in this class of materials, which operates without the assistance of triple junctions. The mechanism can be rationalized by that thermally induced pinch off occurs as the result of bimetal interface faceting and can trigger a classic Rayleigh instability.

Zheng, Shijian; Carpenter, John S.; Wang, Jian; Mara, Nathan A.; Beyerlein, Irene J.

2014-09-01

381

[Juxta facet cyst of the lumbar spine: an uncommon cause of lumbar radiculopathy].  

PubMed

Lumbar juxta facet cysts (JFC) are an uncommon cause of radiculopathy. Spontaneous regression of symptomatic JFC has not often been reported. We describe 2 patients, a 59-year-old man and a 55-year-old man, with radiculopathy of the 5th lumbar nerve root due to a JFC at L4-5. The first patient recovered spontaneously. After 8 months, the JFC had clearly reduced on MRI. In the second patient the JFC was surgically resected due to progressive pain, after which the patient remained without symptoms. In the literature it is suggested that surgical removal of the JFC should be the treatment of choice. However, of the 5 patients who were diagnosed with a JFC in our department, 3 recovered spontaneously and 2 after surgery. In our opinion further studies on the course and management of symptomatic lumbar JFC are warranted. PMID:20619028

de Beukelaar, Janet W K; Dallenga, Alof; de Jong, Gert-Jan; de Winter, Koos J A Ruizeveld; Bakker, Stef L M

2010-01-01

382

Local Supersaturation Dictated Branching and Faceting of Submicrometer PbS Particles with Cubic Growth Habit.  

PubMed

Hierarchical cubelike submicrometer PbS particles consisting of truncated octahedrons, cuboctahedrons, and cubes were prepared in ethylene glycol solution under favorable high mole ratio of thiourea (Tu) to Pb(AC)2 (RS/Pb) via a pumping process. A qualitative analysis based on the classical nucleation theory coupled with the crystal growth theory is employed to interpret the observed experimental phenomena. By varying the concentration of reactants, RS/Pb, and reaction temperature, it is possible to tune the local supersaturation degree (LSD), which is determined by the number of nuclei and overall growth unit (or concentration), surrounding each growing particle that dictates the branching and faceting of PbS particle. Relatively high LSD that is required for branching growth could be achieved at lower concentration of Tu and reaction temperature. Increasing the concentration of Tu and reaction temperature resulted in less LSD and yielded cubic PbS particles. PMID:25338760

Liu, Mingzhu; Leng, Mei; Liu, Dan; Chen, Fanglin; Li, Chengyu; Wang, Cheng

2014-11-01

383

Introducing FACETS, the Framework Application for Core-Edge Transport Simulations  

SciTech Connect

The FACETS (Framework Application for Core-Edge Transport Simulations) project began in January 2007 with the goal of providing core to wall transport modeling of a tokamak fusion reactor. This involves coupling previously separate computations for the core, edge, and wall regions. Such a coupling is primarily through connection regions of lower dimensionality. The project has started developing a component-based coupling framework to bring together models for each of these regions. In the first year, the core model will be a 1 dimensional model (1D transport across flux surfaces coupled to a 2D equilibrium) with fixed equilibrium. The initial edge model will be the fluid model, UEDGE, but inclusion of kinetic models is planned for the out years. The project also has an embedded Scientific Application Partnership that is examining embedding a full-scale turbulence model for obtaining the crosssurface fluxes into a core transport code.

Cary, John R. [Tech-X Corporation; Candy, Jeff [General Atomics; Cohen, Ronald H. [Lawrence Livermore National Laboratory (LLNL); Krasheninnikov, Sergei I [ORNL; McCune, Douglas C [ORNL; Estep, Donald J [Colorado State University, Fort Collins; Larson, Jay W [ORNL; Malony, Allen [University of Oregon; Worley, Patrick H [ORNL; Carlsson, Johann Anders [ORNL; Hakim, A H [Tech-X Corporation; Hamill, P [Tech-X Corporation; Kruger, Scott E [ORNL; Muzsala, S [Tech-X Corporation; Pletzer, Alexander [ORNL; Shasharina, Svetlana [Tech-X Corporation; Wade-Stein, D [Tech-X Corporation; Wang, N [Tech-X Corporation; McInnes, Lois C [ORNL; Wildey, T [Tech-X Corporation; Casper, T. A. [Lawrence Livermore National Laboratory (LLNL); Diachin, Lori A [ORNL; Epperly, Thomas [Lawrence Livermore National Laboratory (LLNL); Rognlien, T. D. [Lawrence Livermore National Laboratory (LLNL); Fahey, Mark R [ORNL; Kuehn, Jeffery A [ORNL; Morris, A [University of Oregon; Shende, Sameer [University of Oregon; Feibush, E [Tech-X Corporation; Hammett, Gregory W [ORNL; Indireshkumar, K [Tech-X Corporation; Ludescher, C [Tech-X Corporation; Randerson, L [Tech-X Corporation; Stotler, D. [Princeton Plasma Physics Laboratory (PPPL); Pigarov, A [University of California, San Diego; Bonoli, P. [Massachusetts Institute of Technology (MIT); Chang, C S [New York University; D'Ippolito, D. A. [Lodestar Research Corporation; Colella, Philip [Lawrence Berkeley National Laboratory (LBNL); Keyes, David E [Columbia University; Bramley, R [Indiana University; Myra, J. R. [Lodestar Research Corporation

2007-06-01

384

Preparation of superparamagnetic MnxFe1-xO nanoparticles from low-index-facet cubes to high-index-facet concave structures and their catalytic performance in aqueous solution  

NASA Astrophysics Data System (ADS)

We report the synthesis of concave magnetic MnxFe1-xO nanoparticles with high-index facet structures by a thermal decomposition approach. The particle morphology varies from cubic shape under pure Ar, to star-like shapes with exposure to air during the reaction. The oxidative etching in the presence of air (O2) strongly affects the exposed facets on the surface. These concave nanoparticles are transferred from the organic phase to aqueous solution and show distinct catalytic activity toward the degradation of xylenol orange in aqueous solution.We report the synthesis of concave magnetic MnxFe1-xO nanoparticles with high-index facet structures by a thermal decomposition approach. The particle morphology varies from cubic shape under pure Ar, to star-like shapes with exposure to air during the reaction. The oxidative etching in the presence of air (O2) strongly affects the exposed facets on the surface. These concave nanoparticles are transferred from the organic phase to aqueous solution and show distinct catalytic activity toward the degradation of xylenol orange in aqueous solution. Electronic supplementary information (ESI) available. See DOI: 10.1039/c3nr01865b

Lee, Pei-Ying; Teng, His-Sheng; Yeh, Chen-Sheng

2013-07-01

385

Teflon-packed flexible joint  

NASA Technical Reports Server (NTRS)

Teflon-packed flexible joint separates the movement of the shaker from the liquid nitrogen hose during the ground testing of cryogenic zero-g equipment. The joint allows the hose to lie on the floor in a stationary position as the shaker moves back and forth, thus, the hose is not subject to violent motion.

Belmont, G. E.

1969-01-01

386

Joint mobility and motor development  

Microsoft Academic Search

The association of joint hypermobility and motor development was sequentially investigated in 715 infants from the ages of 8 to 14 months. Seven joints were evaluated for mobility, and each infant underwent a physical and neurological examination. Parents were given a Denver Developmental Parents' Questionnaire. All subjects with a general developmental delay, systemic illness or syndrome were excluded. The infants

M Jaffe; E Tirosh; A Cohen; Y Taub

1988-01-01

387

Light alloys plates welded joints  

Microsoft Academic Search

In the field described by the topics of the title, there are different ways to achieve the joint. One of them is the spot cold pressure welding. First, the paper presents the experimental results regarding the sharing strength test of the spot cold welded joints. The purpose of the research was to analyze different variant of welding, in order to

Valeriu Georgescu; Mihaela Iordachescu; Bogdan Georgescu

388

Exercise and the Knee Joint.  

ERIC Educational Resources Information Center

This report by the President's Council on Physical Fitness and Sports examines the effects of various forms of physical exercise on the knee joint which, because of its vulnerability, is especially subject to injury. Discussion centers around the physical characteristics of the joint, commonly used measurements for determining knee stability,…

Clarke, H. Harrison, Ed.

1976-01-01

389

Micromechanical model for anisotropic rock joints  

Microsoft Academic Search

Force-deformation relationships of rock joints are important in the study of mechanical behavior of fractured or jointed rocks. Experimental studies have shown that rock joints often exhibit deformation hardening and anisotropic behavior under shearing loads. This paper focuses upon the mathematical modeling of force-deformation behavior of anisotropic rock joints by explicitly considering interaction of asperities on a joint surface. Elastic

Anil Misra

1999-01-01

390

Space Station alpha joint bearing  

NASA Technical Reports Server (NTRS)

Perhaps the most critical structural system aboard the Space Station is the Solar Alpha Rotary Joint which helps align the power generation system with the sun. The joint must provide structural support and controlled rotation to the outboard transverse booms as well as power and data transfer across the joint. The Solar Alpha Rotary Joint is composed of two transition sections and an integral, large diameter bearing. Alpha joint bearing design presents a particularly interesting problem because of its large size and need for high reliability, stiffness, and on orbit maintability. The discrete roller bearing developed is a novel refinement to cam follower technology. It offers thermal compensation and ease of on-orbit maintenance that are not found in conventional rolling element bearings. How the bearing design evolved is summarized. Driving requirements are reviewed, alternative concepts assessed, and the selected design is described.

Everman, Michael R.; Jones, P. Alan; Spencer, Porter A.

1987-01-01

391

Proceedings of 2011 NSF Engineering Research and Innovation Conference, Atlanta, Georgia Grant #0856206 Automatic 3D Facet Orientations Estimation from LIDAR Imaging  

E-print Network

#0856206 Automatic 3D Facet Orientations Estimation from LIDAR Imaging Ye Duan, Xiaoling Li University: This paper presents our current research progress on automatic 3D facet orientations estimation from LIDAR to generate the main fracture surfaces orientations from LIDAR data. Our algorithm/software has been tested

Maerz, Norbert H.

392

Effects of carrier diffusion in the design and measurement of waveguide couplers and etched facets for a semiconductor-integrated optical routing array  

Microsoft Academic Search

Use of electrically variable couplers and etched facet mirrors in a coupled guide cross point switching and routing array is examined. Theoretical analysis, and experimental results of carrier injection into double heterojunction semiconductor rib waveguide electrically variable couplers, together with effect on modal reflectivity at an etched facet mirror, are presented. Results demonstrate that carrier injection is a viable and

Malcolm R. Green; Jayanta Sarma; I. Middlemast

1994-01-01

393

Reduced TiO2 rutile nanorods with well-defined facets and their visible-light photocatalytic activity.  

PubMed

Stable reduced TiO2 rutile nanorods with well-defined facets were prepared by a solvothermal route in the presence of Zn powder. The oxygen vacancy in the TiO2 nanorods, which can be tuned by the amount of Zn, results in a narrow band gap and visible-light photocatalytic activity. PMID:24480810

Zhao, Zhao; Tan, Huaqiao; Zhao, Haifeng; Lv, Yang; Zhou, Li-Jing; Song, Yujiang; Sun, Zaicheng

2014-03-14

394

Green Synthesis of Anatase TiO2 Nanocrystals with Diverse Shapes and their Exposed Facets-Dependent Photoredox Activity.  

PubMed

The exposed facets of a crystal are known to be one of the key factors to its physical, chemical and electronic properties. Herein, we demonstrate the role of amines on the controlled synthesis of TiO2 nanocrystals (NCs) with diverse shapes and different exposed facets. The chemical, physical and electronic properties of the as-synthesized TiO2 NCs were evaluated and their photoredox activity was tested. It was found that the intrinsic photoredox activity of TiO2 NCs can be enhanced by controlling the chemical environment of the surface, i.e.; through morphology evolution. In particular, the rod shape TiO2 NCs with ?25% of {101} and ?75% of {100}/{010} exposed facets show 3.7 and 3.1 times higher photocatalytic activity than that of commercial Degussa P25 TiO2 toward the degradation of methyl orange and methylene blue, respectively. The higher activity of the rod shape TiO2 NCs is ascribed to the facetsphilic nature of the photogenerated carriers within the NCs. The photocatalytic activity of TiO2 NCs are found to be in the order of {101}+{100}/{010} (nanorods) > {101}+{001}+{100}/{010} (nanocuboids and nanocapsules) > {101} (nanoellipsoids) > {001} (nanosheets) providing the direct evidence of exposed facets-depended photocatalytic activity. PMID:25188808

Roy, Nitish; Park, Yohan; Sohn, Youngku; Leung, Kam Tong; Pradhan, Debabrata

2014-10-01

395

An Application of Generalizability Theory and Many-Facet Rasch Measurement Using a Complex Problem-Solving Skills Assessment  

ERIC Educational Resources Information Center

This study describes the use of generalizability theory (GT) and many-facet Rasch measurement (MFRM) to evaluate psychometric properties of responses obtained from an assessment designed to measure complex problem-solving skills. The assessment revolved around the school activity of kickball. The task required of each student was to decide on a…

Smith, Jr., Everett V.; Kulikowich, Jonna M.

2004-01-01

396

Showing and telling about emotions: Interrelations between facets of emotional competence and associations with classroom adjustment in Head Start preschoolers  

Microsoft Academic Search

In this study of low income preschoolers (N?=? 60), we examined relations between three facets of emotional competence: emotion knowledge, level of negative emotion expression, and emotion regulation; and their associations with indicators of classroom adjustment. Emotion knowledge was positively related to positive emotion regulation but was not related to negative emotion expression or negative dysregulation. Negative emotion expression related

Alison L. Miller; Sarah E. Fine; Kathleen Kiely Gouley; Ronald Seifer; Susan Dickstein; Ann Shields

2006-01-01

397

Developing a Measure of Therapist Adherence to Contingency Management: An Application of the Many-Facet Rasch Model  

ERIC Educational Resources Information Center

A unique application of the Many-Facet Rasch Model (MFRM) is introduced as the preferred method for evaluating the psychometric properties of a measure of therapist adherence to Contingency Management (CM) treatment of adolescent substance use. The utility of psychometric methods based in Classical Test Theory was limited by complexities of the…

Chapman, Jason E.; Sheidow, Ashli J.; Henggeler, Scott W.; Halliday-Boykins, Colleen A.; Cunningham, Phillippe B.

2008-01-01

398

A Comparison of Generalizability Theory and Many-Facet Rasch Measurement in an Analysis of College Sophomore Writing  

ERIC Educational Resources Information Center

A pilot study was conducted to evaluate and improve the rating procedure proposed for use in a research effort designed to assess the essay writing ability of college sophomores. Generalizability theory and the Many-Facet Rasch Model were each used to (a) estimate potential sources of error in the rating, (b) to obtain reliability estimates, and…

Sudweeks, Richard R.; Reeve, Suzanne; Bradshaw, William S.

2004-01-01

399

Faceted growth of primary Al{sub 2}Cu crystals during directional solidification in high magnetic field  

SciTech Connect

The high magnetic field is widely used to modify the crystal morphology. In this work, the effect of the magnetic field on growing behavior of faceted crystals in the Al-40 wt. %Cu alloy was investigated using directional solidification technique. It was found that the faceted growth of primary Al{sub 2}Cu phase was degraded and the primary spacing was reduced upon applying the magnetic field. Additionally, the length of the mushy zone first decreased and then increased with increase of the magnetic field intensity. The quantitative analysis reveals that the shear stress induced by the fluid motion is insufficient to break the atom bonds at the solid-liquid interface. However, both of the thermoelectric magnetic convection (TEMC) and the thermoelectric magnetic force (TEMF) cause dendrites to fracture and reduce the primary spacing. The two effects also weaken the faceting growth. Moreover, the instability of the solid-liquid interface is generated by the TEMF, which further leads to degrade the faceted growth. The length of mushy zone was changed by the TEMC and reached the minimum in the magnetic field of 0.5 T, which is in good agreement with the predicted value (0.83 T)

Li, Chuanjun; Ren, Zhongming; Shen, Yu [School of Materials Science and Engineering, Shanghai University, Shanghai 200072 (China)] [School of Materials Science and Engineering, Shanghai University, Shanghai 200072 (China); Wang, Qiuliang; Dai, Yinming; Wang, Hui [Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190 (China)] [Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190 (China)

2013-10-21

400

The Structural Validity of the Perceived Traits of the "Ideal Student" Multi-Faceted Theory among Education Students  

ERIC Educational Resources Information Center

The article presents a multi-faceted theory of "ideal high school student" traits. The trait system, as defined by several theories, is a translation of the teachers' belief system into educational objectives. The study focused on Bloom's taxonomies and the structural validity of its principles, using Similarity Structure Analysis. Aware of the…

Maslovaty, Nava; Cohen, Arie; Furman, Sari

2008-01-01

401

Heterogeneous inhibition processes involved in different facets of self-reported impulsivity: Evidence from a community sample  

Microsoft Academic Search

Whiteside and Lynam (Whiteside, S. P., & Lynam, D. R. (2001). The Five Factor Model and impulsivity: Using a structural model of personality to understand impulsivity. Personality and Individual Differences, 30, 669–689) clarified the multifaceted nature of impulsivity by identifying four distinct facets of self-reported impulsive behaviors: urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking. Building on work

Philippe Gay; Lucien Rochat; Joël Billieux; Mathieu d’Acremont; Martial Van der Linden

2008-01-01

402

Introduction Joints and the muscle articulation  

E-print Network

: biomechanics, Cephalopoda, electromyography, mus the joint. The morphology of the articulating surfaces and joint capsule controls the range of motion segments of smaller insects use this mechanism. The joint studied here, termed a `muscle articulation

Kier, William M.

403

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint fundraising. 9034.8 Section 9034.8 Federal... ENTITLEMENTS § 9034.8 Joint fundraising. (a) General. Nothing...this subchapter may engage in joint fundraising with other candidates, political...

2011-01-01

404

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint fundraising. 9034.8 Section 9034.8 Federal... ENTITLEMENTS § 9034.8 Joint fundraising. (a) General. Nothing...this subchapter may engage in joint fundraising with other candidates, political...

2010-01-01

405

Musculoskeletal US: examining the joints.  

PubMed

Musculoskeletal ultrasound (US) is an excellent tool to diagnose muscle, tendon and ligament injuries, cystic structures and peripheral nerve compression, as well as soft tissue masses, without the risk of ionizing radiation. Musculoskeletal US is now routinely used by a growing number of rheumatology and sports medicine centres throughout UK. In standard clinical practice, US has an extremely useful application in differentiating fluid from soft tissue and identifying the severity of joint inflammation. The work described in this article was carried out to assess patients' feedback regarding the use of US guidance for intra-articular injections and/or the removal of fluid from their inflamed knee joints in a nurse-led clinic. Nineteen patients who had US-guided knee joint injection/aspiration in the clinic were asked to complete a questionnaire regarding their satisfaction with the procedure, and to rate their joint pain and patient global assessment (using numerical visual analogue scale) before the US-guided procedure, and 1 month after. Results revealed a significant improvement (p<0.001) of the joint injection outcome measures and the patients' satisfaction of the US-guided procedure. Therefore, musculoskeletal US can improve two fundamental clinical skills: the clinical diagnosis of joint inflammation, and the accuracy of joint injection/aspiration. This study supports the concept that incorporating musculoskeletal US into clinical practice leads to significant improvements in patient care. It also reveals that US-guided procedures are appreciated by patients. PMID:22584929

El Miedany, Yasser

406

Common Bolted Joint Analysis Tool  

NASA Technical Reports Server (NTRS)

Common Bolted Joint Analysis Tool (comBAT) is an Excel/VB-based bolted joint analysis/optimization program that lays out a systematic foundation for an inexperienced or seasoned analyst to determine fastener size, material, and assembly torque for a given design. Analysts are able to perform numerous what-if scenarios within minutes to arrive at an optimal solution. The program evaluates input design parameters, performs joint assembly checks, and steps through numerous calculations to arrive at several key margins of safety for each member in a joint. It also checks for joint gapping, provides fatigue calculations, and generates joint diagrams for a visual reference. Optimum fastener size and material, as well as correct torque, can then be provided. Analysis methodology, equations, and guidelines are provided throughout the solution sequence so that this program does not become a "black box:" for the analyst. There are built-in databases that reduce the legwork required by the analyst. Each step is clearly identified and results are provided in number format, as well as color-coded spelled-out words to draw user attention. The three key features of the software are robust technical content, innovative and user friendly I/O, and a large database. The program addresses every aspect of bolted joint analysis and proves to be an instructional tool at the same time. It saves analysis time, has intelligent messaging features, and catches operator errors in real time.

Imtiaz, Kauser

2011-01-01

407

Compliant Prosthetic Or Robotic Joint  

NASA Technical Reports Server (NTRS)

Rotation partly free and partly restrained by resilience and damping. Joint includes U-shaped x- and y-axis frames joined by cables that cross in at center piece. The y-axis frame rotates about y-axis on roller bearing within predetermined angular range. The y-axis frame rotates slightly farther when arm strikes stop, because cables can twist. This mimics compliant resistance of knee joint reaching limit of its forward or backward motion. Used in prosthetic device to replace diseased or damage human joint, or in robot linkage to limit movement and cushion overloads.

Kerley, James J.; Eklund, Wayne D.

1989-01-01

408

Imaging of the patellofemoral joint.  

PubMed

The patellofemoral (PF) joint is a complex articulation, with interplay between the osseous and soft tissue structures to maintain the balance between knee mobility and stability. Disorders of the PF joint can be a source of anterior knee pain (AKP). In this article, radiographic and magnetic resonance imaging of the PF joint are reviewed, including normal anatomy, imaging techniques, and imaging-based measurements. Common imaging findings associated with AKP are reviewed, including symptomatic normal variants, tendinopathy, apophysitis, osteoarthritis, chondromalacia patella, trochlear dysplasia, excessive lateralization of tibial tuberosity, patellar maltracking, patellar dislocation and fractures, anterior bursitis, Morel-Lavallée effusions, and fat pad edema. PMID:24993408

Thomas, Stephen; Rupiper, David; Stacy, G Scott

2014-07-01

409

Kinetic limitations of intracranial joints in Brachylophosaurus canadensis and Edmontosaurus regalis (Dinosauria: Hadrosauridae), and their implications for the chewing mechanics of hadrosaurids.  

PubMed

The highly specialized tooth morphology and arrangement of the dental battery of hadrosaurids has led to much speculation surrounding the chewing mechanics of this successful group of herbivorous dinosaurs. Pleurokinesis, a long established hypothesis explaining the ornithopod chewing mechanism, proposes a transverse power stroke in hadrosaurids that was accommodated by vertical adduction of the mandible, lateral rotation of the maxilla at the maxilla-premaxilla joint, lateral rotation of the jugal-maxilla complex at its contact with the lacrimal, and posterolateral rotation of the quadrate at its contact with the squamosal. A secondary series of movements were also thought to have occurred as a consequence of these primary movements. In this article, the intracranial joint morphology is described for both Brachylophosaurus canadensis and Edmontosaurus regalis and their permissive kinematics are established. Based on this evidence, the movements associated with pleurokinesis are not accommodated in these hadrosaurine dinosaurs. Rather, the movements that seem most likely to have produced the observed dental wear patterns are those associated with the mandible about the jaw joint. The structure of this joint appears well-suited to have accommodated some translation as well as rotation of the mandible about the quadrate condyle. Three-dimensional modeling of the alternate mandibular movements reveals that not all the combined labiolingual width of the lingual and buccal facets of the tooth row was involved in the power stroke. Rather, limits on the degree of mandibular long axis rotation suggest that only the lingual facet and the more medial portion of the buccal facet were utilized. PMID:22488827

Cuthbertson, Robin S; Tirabasso, Alex; Rybczynski, Natalia; Holmes, Robert B

2012-06-01

410

The complexity of joint computation  

E-print Network

Joint computation is the ubiquitous scenario in which a computer is presented with not one, but many computational tasks to perform. A fundamental question arises: when can we cleverly combine computations, to perform them ...

Drucker, Andrew Donald

2012-01-01

411

Joint probabilities and quantum cognition  

E-print Network

In this paper we discuss the existence of joint probability distributions for quantum-like response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

J. Acacio de Barros

2012-06-26

412

Joint probabilities and quantum cognition  

SciTech Connect

In this paper we discuss the existence of joint probability distributions for quantumlike response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

Acacio de Barros, J. [Liberal Studies, 1600 Holloway Ave., San Francisco State University, San Francisco, CA 94132 (United States)

2012-12-18

413

Biofluid lubrication for artificial joints  

E-print Network

. [33]. It is comprised of three areas as follows: lubrication, friction, and wear. In the natural human joint during lubrication, the same principle applies. The frictional patterns of bearing are adapted by the existence of a lubricant [33.... [33]. It is comprised of three areas as follows: lubrication, friction, and wear. In the natural human joint during lubrication, the same principle applies. The frictional patterns of bearing are adapted by the existence of a lubricant [33...

Pendelton, Alice Mae

2009-05-15

414

Examining the factor structures of the five facet mindfulness questionnaire and the self-compassion scale.  

PubMed

The five facet mindfulness questionnaire (FFMQ; Baer, Smith, Hopkins, Krietemeyer, & Toney, 2006) and the self-compassion scale (SCS; Neff, 2003) are widely used measures of mindfulness and self-compassion in mindfulness-based intervention research. The psychometric properties of the FFMQ and the SCS need to be independently replicated in community samples and relevant clinical samples to support their use. Our primary aim was to establish the factor structures of the FFMQ and SCS in individuals with recurrent depression in remission, since mindfulness-based cognitive therapy (MBCT) was developed as a treatment for preventing depressive relapse. In order to determine the consistency across populations, we examined the factor structures of the FFMQ and SCS in 3 samples: (1) a convenience sample of adults, (2) a sample of adults who practice meditation, and (3) a sample of adults who suffer from recurrent depression and were recruited to take part in a trial of MBCT. Confirmatory factor analyses (CFAs) showed that a 4-factor hierarchical model of the FFMQ best fits the community sample and the clinical sample but that a 5-factor hierarchical model of the FFMQ best fits the meditator sample. CFA did not endorse the SCS 6-factor hierarchical structure in any of the 3 samples. Clinicians and researchers should be aware of the psychometric properties of the FFMQ to measure mindfulness when comparing meditators and nonmeditators. Further research is needed to develop a more psychometrically robust measure of self-compassion. PMID:24490681

Williams, Matthew J; Dalgleish, Tim; Karl, Anke; Kuyken, Willem

2014-06-01

415

Faceting control in core-shell GaN micropillars using selective epitaxy  

NASA Astrophysics Data System (ADS)

We report on the fabrication of large-area, vertically aligned GaN epitaxial core-shell micropillar arrays. The two-step process consists of inductively coupled plasma (ICP) etching of lithographically patterned GaN-on-Si substrate to produce an array of micropillars followed by selective growth of GaN shells over these pillars using Hydride Vapor Phase Epitaxy (HVPE). The most significant aspect of the study is the demonstration of the sidewall facet control in the shells, ranging from {1 1 ¯ 01} semi-polar to {1 1 ¯ 00} non-polar planes, by employing a post-ICP chemical etch and by tuning the HVPE growth temperature. Room-temperature photoluminescence, cathodoluminescence, and Raman scattering measurements reveal substantial reduction of parasitic yellow luminescence as well as strain-relaxation in the core-shell structures. In addition, X-ray diffraction indicates improved crystal quality after the shell formation. This study demonstrates the feasibility of selective epitaxy on micro-/nano- engineered templates for realizing high-quality GaN-on-Si devices.

Krylyuk, Sergiy; Debnath, Ratan; Yoon, Heayoung P.; King, Matthew R.; Ha, Jong-Yoon; Wen, Baomei; Motayed, Abhishek; Davydov, Albert V.

2014-10-01

416

Dissociated signals in human dentate gyrus and CA3 predict different facets of recognition memory.  

PubMed

A wealth of evidence has implicated the hippocampus and surrounding medial temporal lobe cortices in support of recognition memory. However, the roles of the various subfields of the hippocampus are poorly understood. In this study, we concurrently varied stimulus familiarization and repetition to engage different facets of recognition memory. Using high-resolution fMRI (1.5 mm isotropic), we observed distinct familiarity and repetition-related recognition signal profiles in the dentate gyrus (DG)/CA3 subfield in human subjects. The DG/CA3 demonstrated robust response suppression with repetition and familiarity-related facilitation. Both of these discrete responses were predictive of different aspects of behavioral performance. Consistent with previous work, we observed novelty responses in CA1 consistent with "match/mismatch detection," as well as mixed recognition signaling distributed across medial temporal lobe cortices. Additional analyses indicated that the repetition and familiarity-related signals in the DG/CA3 were strikingly dissociated along the hippocampal longitudinal axis and that activity in the posterior hippocampus was strongly correlated with the retrosplenial cortex. These data provide novel insight into the roles of hippocampal subfields in support of recognition memory and further provide evidence of a functional heterogeneity in the human DG/CA3, particularly along the longitudinal axis. PMID:25274810

Reagh, Zachariah M; Watabe, Joseph; Ly, Maria; Murray, Elizabeth; Yassa, Michael A

2014-10-01

417

A Mitocentric View of Alzheimer's Disease Suggests Multi-Faceted Treatments  

PubMed Central

Alzheimer’s disease (AD) is defined by plaques made of amyloid-? peptide (A?), tangles made of hyper-phosphorylated tau proteins and memory deficits. Thus, the events initiating the cascade leading to these end points may be more effective therapeutic targets than treating each facet individually. In the small percentage of cases of AD that are genetic (or animal models that reflect this form of AD), the factor initiating AD is clear (e.g. genetic mutations lead to high A?1–42 or hyperphosphorylated tau proteins). In the vast majority of AD cases, the cause is unknown. Substantial evidence now suggests that abnormalities in Glucose metabolism/Mitochondrial function/Oxidative stress (GMO) are an invariant feature of AD and occur at early stage of the disease process in both genetic and non-genetic forms of AD. Indeed, decreases in brain glucose utilization are diagnostic for AD. Changes in calcium homeostasis also precede clinical manifestations of AD. Abnormal GMO can lead to plaques, tangles and the calcium abnormalities that accompany AD. Abnormalities in GMO diminish the ability of the brain to adapt. Therapies targeting mitochondria may ameliorate abnormalities in plaques, tangles, calcium homeostasis and cognition that comprise AD. PMID:20463407

Gibson, Gary E.; Shi, Qingli

2011-01-01

418

Implementation of and first results from FACETS embedded core turbulence transport solver  

NASA Astrophysics Data System (ADS)

We present progress in implementation of a core-transport solver with fluxes computed from gyrofluid/gyrokinetic calculations. The gyrofluid fluxes are computed using the theory-based Trapped Gyro-Landau Fluid (TGLF) flux model while the gyrokinetic fluxes are computed from the continuum code GYRO. The solver itself is implemented in the FACETS whole-device modeling framework. Our solver uses a matrix-free Newton solver from the PETSc library, a hypersecant Jacobian evaluation and a novel grid sequencing strategy to accelerate the convergence of the non-linear iterations, minimizingg the flux evaluations. In addition, we have implemented a load balancing scheme using mixed integer linear programming techniques allowing us to achieve near-optimal parallel scaling while using GYRO. We present results of evolving temperature profiles of electrons and ions from DIII-D shot 118897. Time dependent boundary conditions are applied at the core-edge boundary and are taken from experimental measurements. Core heating profiles are held fixed during the evolution and are taken from an interpretive ONETWO simulation. Neoclassical fluxes are computed using a Chang-Hinton model. We compare the evolution with embedded turbulence fluxes to that obtained from the GLF23 model and discuss plans to validate the solver with experimental data.

Carlsson, Johan; Hakim, Ammar; Epperly, Tom

2011-11-01

419

Quality Analysis on Ransac-Based Roof Facets Extraction from Airborne LIDAR Data  

NASA Astrophysics Data System (ADS)

RANSAC algorithm is a robust method for model estimation. It is widely used in the extraction of geometry primitives and 3D model reconstruction. However, there has been relatively little comprehensive evaluation in RANSAC-based approach for plane extraction. In order to provide a reference for improving the quality on RANSAC-based approach for roof facets extraction or segmentation, this paper focuses on the quality analysis on classical RANSAC algorithm. Airborne LIDAR data from the test Area 1 and Area 2 in Vaihingen (German) is used. 33 buildings (4 buildings with flat roofs and 29 buildings with slope roofs) extracted from LIDAR data are taken as input for planes extraction. Based on the characteristics of detected planar surfaces, planes can fall into several categories: non-segmented planes, over-segmented planes, under-segmented planes and spurious planes. Then, several causes for these quality problems are discussed. Some experimental results and analyses show that, considering spatial-domain connectivity, most of the quality problems of classical RANSAC algorithm can be improved. However, there are still many issues requiring in-depth research. Finally, some methods are suggested to solve these problems.

Yan, J.; Jiang, W.; Shan, J.

2012-07-01

420

Periodic faceting on TaC(110): Observations using high-resolution low-energy electron diffraction and scanning tunneling microscopy  

SciTech Connect

Unidirectional alternating (100)-(010) faceting has been observed for the clean TaC(110) surface using both high-resolution low-energy electron diffraction and scanning tunneling microscopy. Facets propagate periodically along the [1[bar 1]0] direction and form a ridge-and-valley grating, characterized by an average periodicity of [similar to]6 lattice spacings in the [1[bar 1]0] direction, where (110) terraces are completely absent. This faceted surface is shown to be an energetically favored structure.

Zuo, J.; Warmack, R.J.; Zehner, D.M.; Wendelken, J.F. (Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6024 (United States))

1993-04-15

421

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2012 CFR

...Transportation 4 2012-10-01 2012-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2012-10-01

422

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2010 CFR

...Transportation 4 2010-10-01 2010-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2010-10-01

423

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2011 CFR

...Transportation 4 2011-10-01 2011-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2011-10-01

424

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

425

Simplified procedures for designing composite bolted joints  

NASA Technical Reports Server (NTRS)

Simplified procedures are described to design and analyze single and multi-bolt composite joints. Numerical examples illustrate the use of these methods. Factors affecting composite bolted joints are summarized. References are cited where more detailed discussion is presented on specific aspects of composite bolted joints. Design variables associated with these joints are summarized in the appendix.

Chamis, Christos C.

1988-01-01

426

Management of acromioclavicular joint injuries.  

PubMed

Acromioclavicular joint injuries are among the most common shoulder girdle injuries in athletes and most commonly result from a direct force to the acromion with the arm in an adducted position. Acromioclavicular joint injuries often present with associated injuries to the glenohumeral joint, including an increased incidence of superior labrum anterior posterior (SLAP) tears that may warrant further evaluation and treatment. Anteroposterior stability of the acromioclavicular joint is conferred by the capsule and acromioclavicular ligaments, of which the posterior and superior ligaments are the strongest. Superior-inferior stability is maintained by the coracoclavicular (conoid and trapezoid) ligaments. Type-I or type-II acromioclavicular joint injuries have been treated with sling immobilization, early shoulder motion, and physical therapy, with favorable outcomes. Return to activity can occur when normal shoulder motion and strength are obtained and the shoulder is asymptomatic as compared with the contralateral normal extremity. The management of type-III injuries remains controversial and is individualized. While a return to the previous level of functional activity with nonsurgical treatment has been documented in a number of case series, surgical reduction and coracoclavicular ligament reconstruction has been associated with a favorable outcome and can be considered in patients who place high functional demands on their shoulders or in athletes who participate in overhead sports. Surgical management is indicated for high-grade (?type IV) acromioclavicular joint injuries to achieve anatomic reduction of the acromioclavicular joint, reconstruction of the coracoclavicular ligaments, and repair of the deltotrapezial fascia. Outcomes after surgical reconstruction of the coracoclavicular ligaments have been satisfactory with regard to achieving pain relief and return to functional activities, but further improvements in the biomechanical strength of these constructs are necessary to avoid loss of reduction and creep with cyclic loading. PMID:24382728

Li, Xinning; Ma, Richard; Bedi, Asheesh; Dines, David M; Altchek, David W; Dines, Joshua S

2014-01-01

427

Hierarchical LiFePO4 with a controllable growth of the (010) facet for lithium-ion batteries  

PubMed Central

Hierarchically structured LiFePO4 was successfully synthesized by ionic liquid solvothermal method. These hierarchically structured LiFePO4 samples were constructed from nanostructured platelets with their (010) facets mainly exposed. To the best of our knowledge, facet control of a hierarchical LiFePO4 crystal has not been reported yet. Based on a series of experimental results, a tentative mechanism for the formation of these hierarchical structures was proposed. After these hierarchically structured LiFePO4 samples were coated with a thin carbon layer and used as cathode materials for lithium-ion batteries, they exhibited excellent high-rate discharge capability and cycling stability. For instance, a capacity of 95% can be maintained for the LiFePO4 sample at a rate as high as 20 C, even after 1000 cycles. PMID:24071818

Guo, Binbin; Ruan, Hongcheng; Zheng, Cheng; Fei, Hailong; Wei, Mingdeng

2013-01-01

428

Oxygen Reduction on Well-Defined Core-Shell Nanocatalysts: Particle Size, Facet, and Pt Shell Thickness Effects  

SciTech Connect

We examined the effects of the thickness of the Pt shell, lattice mismatch, and particle size on specific and mass activities from the changes in effective surface area and activity for oxygen reduction induced by stepwise Pt-monolayer depositions on Pd and Pd{sub 3}Co nanoparticles. The core?shell structure was characterized at the atomic level using Z-contrast scanning transmission electron microscopy coupled with element-sensitive electron energy loss spectroscopy. The enhancements in specific activity are largely attributed to the compressive strain effect based on the density functional theory calculations using a nanoparticle model, revealing the effect of nanosize-induced surface contraction on facet-dependent oxygen binding energy. The results suggest that moderately compressed (111) facets are most conducive to oxygen reduction reaction on small nanoparticles and indicate the importance of concerted structure and component optimization for enhancing core?shell nanocatalysts activity and durability.

Wang, J.X.; Inada, H.; Wu, L.; Zhu, Y.; Choi, Y.; Liu, P.; Zhou, W.-P.; Adzic, R.R.

2009-11-09

429

Facets of anger, childhood sexual victimization, and gender as predictors of suicide attempts by psychiatric patients after hospital discharge.  

PubMed

Models of suicidal behavior that assess the interplay of multiple risk factors are needed to better identify at-risk individuals during periods of elevated risk, including following psychiatric hospitalization. This study investigated contributions of facets of anger, gender, and sexual victimization to risk for suicide attempts after hospital discharge. Psychiatric patients (N = 748; ages 18-40; 44% female) recruited from 3 inpatient facilities were assessed during hospitalization and every 10 weeks during the year following discharge as part of the MacArthur Violence Risk Assessment Study. Multiple logistic regression models with facets of anger (disposition toward physiological arousal, hostile cognitions, and angry behavior) from the Novaco Anger Scale (Novaco, 1994), gender, and childhood sexual victimization history were used to predict suicide attempts in the year following hospital discharge. Facets of anger differentially predicted suicide attempts as a function of gender and sexual victimization history, over and above the variance accounted for by symptoms of depression, anxiety, and recent suicide attempts. In men, greater disposition toward angry behavior predicted an overall greater likelihood of a suicide attempt in the year following hospital discharge, particularly among men with childhood sexual victimization. In women with a history of childhood sexual victimization, physiological arousal predicted suicide attempts. Results indicate that facets of anger are relevant predictors of suicide attempts following hospital discharge for psychiatric patients with a history of childhood sexual victimization. Further, results suggest that incorporating gender and victimization history into models of risk for suicide can help clarify relationships between anger and self-directed violence. PMID:23834063

Sadeh, Naomi; McNiel, Dale E

2013-08-01

430

What Facets of Mindfulness Contribute to Psychological Well-being and Depressive, Anxious, and Stress-related Symptomatology?  

Microsoft Academic Search

Since the 1980s, mindfulness techniques have been increasingly utilized in clinical psychology, often as an adjunct to cognitive\\u000a or behavioral interventions and with a growing evidence base. According to a five-facet operationalization, mindfulness is\\u000a a capacity to (a) observe, (b) describe, and (c) act with awareness of present moment experience, with a (d) nonjudgmental\\u000a and (e) nonreactive attitude. The aim

Morgan Cash; Koa Whittingham

2010-01-01

431

The many-facet Rasch model in the analysis of the go\\/no-go association task  

Microsoft Academic Search

This article provides a many-facet Rasch measurement (MFRM) analysis of go\\/no-go association task (GNAT)-based measures of\\u000a implicit attitudes toward sweet and salty food. We describe the statistical model and the strategy we adopted to score the\\u000a GNAT, and we emphasize that, when analyzing implicit measures, MFRM indexes have to be interpreted in a peculiar way. In comparison\\u000a with traditional scoring

Michelangelo Vianello; Egidio Robusto

2010-01-01

432

High-power AlGaInP laser diodes with current-injection-free region near the laser facet  

Microsoft Academic Search

A high-power AlGaInP laser diode with current-injection-free region near the facet is successfully fabricated by metaorganic chemical vapor deposition (MOCVD) using the (100) direction n-GaAs substrates with a misorientation of 15 deg toward the (011) direction. The maximum continuous wave output power is about 90 mW for the traditional structure. In comparison, the maximum output power is enhanced by about

Yun Xu; Yuzhang Li; Qiaoqiang Gan; Qing Cao; Guofeng Song; Liang Guo; Lianghui Chen

2006-01-01

433

Special WC\\/Co orientation relationships at basal facets of WC grains in WC–Co alloys  

Microsoft Academic Search

In WC–Co alloys prepared by liquid phase sintering WC grains are partly surrounded by the Co binder and are terminated by\\u000a basal and prismatic facets. This work reports transmission electron microscopy (TEM) observations on basal WC\\/Co interfaces.\\u000a Two kinds of preferred orientation relationships are found. The one most common corresponds to the joining of (0001)WC with (111)Co planes. It leads

Valérie Bounhoure; Sabine Lay; Marc Loubradou; Jean-Michel Missiaen

2008-01-01

434

Correlates of the MMPI–A Psychopathology Five (PSY–5) Facet Scales in an Adolescent Inpatient Sample  

Microsoft Academic Search

We explored the validity of the Psychopathology Five (PSY–5) facet scales of the adolescent version of the Minnesota Multiphasic Personality Inventory (MMPI–A; Butcher et al., 1992) in an adolescent inpatient psychiatric sample (N = 662) through a series of correlational analyses with self-report measures, therapist ratings, and chart review variables. Consistent with previous research with PSY–5 parent scales, externalizing symptoms

John Stokes; David Pogge; Jessica Sarnicola; Robert McGrath

2009-01-01

435

Study on low temperature facetting growth of polycrystalline silicon thin films by ECR downstream plasma CVD with different hydrogen dilution  

Microsoft Academic Search

Polycrystalline silicon films with grain size of 1 ?m have been successfully deposited on glass substrates using electron cyclotron resonance chemical vapor deposition (ECR-CVD) with hydrogen dilution method at 250°C and without any thermal annealing. The deposited poly-Si films exhibited severe `hill and valley' surface roughness and facets structures. The X-ray diffraction spectra showed that the dominant crystal textures are

H. L Hsiao; H. L Hwang; A. B Yang; L. W Chen; T. R Yew

1999-01-01

436

Transformation of the habitus of electrolytic copper microcrystals with inhibition of the growth of low-energy facets  

NASA Astrophysics Data System (ADS)

Experimental evidence of the possibility of controllable transformation of the habitus of microcrystals formed under electrodeposition of copper has been presented. A premeditated change in the chemical composition of the standard sulfuric electrolyte results in the prevalent evolution of the microcrystal facets with an alternative crystallographic orientation. The analysis of the experimental results has revealed the formation of needle-like pentagonal microcrystals with a self-similar structure.

Yasnikov, I. S.; Denisova, D. A.

2012-05-01

437

Triplet repeat in the Repin1 3? -untranslated region on rat chromosome 4 correlates with facets of the metabolic syndrome  

Microsoft Academic Search

Background Congenic and subcongenic rat strains confirmed the quanti- tative trait loci (QTLs) for facets of the metabolic syndrome between 60.53 and 77.11 Mb on chromosome 4. The analysis of candidate genes in this region favoured the replication initiator 1 (Repin1) characterized by a SNP in the coding region and a triplet repeat (TTT) in the 3? -untranslated region (3?

Nora Kloting; Barbara Wilke; Ingrid Kloting

438

Applying the many?facet Rasch model to evaluate PowerPoint presentation performance in higher education  

Microsoft Academic Search

This study investigated the usefulness of the many?facet Rasch model (MFRM) in evaluating the quality of performance related to PowerPoint presentations in higher education. The Rasch Model utilizes item response theory stating that the probability of a correct response to a test item\\/task depends largely on a single parameter, the ability of the person. MFRM extends this one?parameter model to

Ramazan Basturk

2008-01-01

439

Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres.  

PubMed

The development of thermally stable, nanometer-sized precious metal-based catalysts remains a daunting challenge. Such materials, especially those based on the use of costly platinum metal, are essential and, to date, non-replaceable for a large number of industrially important catalytic processes. Here we report a well-defined cuboctahedral MgAl2O4 spinel support material that is capable of stabilizing platinum particles in the range of 1-3?nm on its relatively abundant {111} facets during extremely severe aging at 800?°C in air for 1 week. The aged catalysts retain platinum dispersions of 15.9% with catalytic activities for methanol oxidation being ~80% of that of fresh ones, whereas a conventional Pt/?-Al2O3 catalyst is severely sintered and nearly inactive. We reveal the origin of the markedly superior ability of spinel {111} facets, resulting from strong interactions between spinel surface oxygens and epitaxial platinum {111} facets, inspiring the rational design of anti-sintering supported platinum group catalysts. PMID:24064958

Li, Wei-Zhen; Kovarik, Libor; Mei, Donghai; Liu, Jun; Wang, Yong; Peden, Charles H F

2013-01-01

440

In situ identification of crystal facet-mediated chemical reactions on tetrahexahedral gold nanocrystals using surface-enhanced Raman spectroscopy.  

PubMed

Direct monitoring of a metal-catalyzed reaction by surface-enhanced Raman scattering (SERS) is always a challenging issue as it needs bifunctional metal structures that have plasmonic properties and also act as catalysts. Here we demonstrate that the tetrahexahedral (THH) gold nanocrystals (Au NCs) with exposed {520} facets give highly enhanced Raman signals from molecules at the interface, permitting in situ observation of chemical transformation from para-aminothiophenol (PATP) to 4,4'-dimercaptoazobenzene (DMAB). The origin of the intense SERS signals of DMAB is carefully investigated based on the comparison of the SERS spectra of PATP obtained with both the THH Au NCs and the Au nanospheres with the exposed {111} facets. It is elucidated that the high-index {520} facet rather than the localized surface plasmons of the THH Au NCs plays a key role in producing a high yield of the product DMAB which is accompanied by the selective enhancement of the characteristic Raman signals. PMID:24121935

Lang, Xiufeng; You, Tingting; Yin, Penggang; Tan, Enzhong; Zhang, Yan; Huang, Yifan; Zhu, Hongping; Ren, Bin; Guo, Lin

2013-11-28

441

Epitaxial Growth of ZnO Nanodisks with Large Exposed Polar Facets on Nanowire Arrays for Promoting Photoelectrochemical Water Splitting.  

PubMed

Single-crystalline and branched 1D arrays, ZnO nanowires/nanodisks (NWs/NDs) arrays, are fabricated to significantly enhance the performance of photoelectrochemical (PEC) water splitting. The epitaxial growth of the ZnO NDs with large exposed polar facets on ZnO NWs exhibits a laminated structure, which dramatically increases the light scattering capacity of the NWs arrays, especially in the wavelength region around 400 nm. The ND branching of the 1D arrays in the epitaxial fashion not only increase surface area and light utilization, but also support fast charge transport, leading to the considerable increase of photocurrent. Moreover, the tiny size NDs can facilitate charge separation and reduce charge recombination, while the large exposed polar facets of NDs reduce the external potential bias needed for water splitting. These advantages land the ZnO NWs/NDs arrays a four times higher power conversion efficiency than the ZnO NWs arrays. By sensitizing the ZnO NWs/NDs with CdS and CdSe quantum dots, the PEC performance can be further improved. This work advocates a trunk/leaf in forest concept for the single-crystalline NWs/NDs in array with enlarged exposure of polar facets, which opens the way for optimizing light harvesting and charge separation and transport, and thus the PEC water splitting. PMID:24990800

Chen, Haining; Wei, Zhanhua; Yan, Keyou; Bai, Yang; Zhu, Zonglong; Zhang, Teng; Yang, Shihe

2014-11-01

442

Electronic states in faceted Au(111) studied with curved crystal surfaces This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-print Network

that determines the critical size of reconstructed (dw) and unreconstructed (dn) terraces during Au faceting. They are attractive as playgrounds for testing the fundamental properties of electrons at one- or two-dimensional (1D

Ortega, Enrique

443

Joint attention and language evolution  

NASA Astrophysics Data System (ADS)

This study investigates how more advanced joint attentional mechanisms, rather than only shared attention between two agents and an object, can be implemented and how they influence the results of language games played by these agents. We present computer simulations with language games showing that adding constructs that mimic the three stages of joint attention identified in children's early development (checking attention, following attention, and directing attention) substantially increase the performance of agents in these language games. In particular, the rates of improved performance for the individual attentional mechanisms have the same ordering as that of the emergence of these mechanisms in infants' development. These results suggest that language evolution and joint attentional mechanisms have developed in a co-evolutionary way, and that the evolutionary emergence of the individual attentional mechanisms is ordered just like their developmental emergence.

Kwisthout, Johan; Vogt, Paul; Haselager, Pim; Dijkstra, Ton

2008-06-01

444

[Divorce and joint physical custody].  

PubMed

This work first recalls the definition of joint physical custody, as well as the current legal procedure for obtaining it, its practical implementation, the financial implications for parents, and finally some statistics. Some psychological and psychopathological reflections on the impact of divorce on children are then presented before considering the question of joint physically custody with regard to attachment theory and depending on the age of the child (a great caution seems to be required before three years). The article concludes with a brief discussion of parental alienation syndrome. PMID:24630624

Golse, B

2014-04-01

445

Dual and Joint Degrees Dual and Joint Degrees  

E-print Network

Education plus major program overlap · Use existing degree for simpler approval ­ Argues against joint Degrees Conservative: Security and Simplicity · Protect institutional brand integrity ­ Reputation of institutional education ­ Retain control of institution's degree programs · Maintain (relative) simplicity