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Sample records for evaluations joint evaluation

  1. Dissimilar metals joint evaluation

    Science.gov (United States)

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

    1974-01-01

    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.

  2. Evaluation of Rock Joint Coefficients

    Science.gov (United States)

    Audy, Ondřej; Ficker, Tomáš

    2017-10-01

    A computer method for evaluation of rock joint coefficients is described and several applications are presented. The method is based on two absolute numerical indicators that are formed by means of the Fourier replicas of rock joint profiles. The first indicator quantifies the vertical depth of profiles and the second indicator classifies wavy character of profiles. The absolute indicators have replaced the formerly used relative indicators that showed some artificial behavior in some cases. This contribution is focused on practical computations testing the functionality of the newly introduced indicators.

  3. Evaluation of Brazed Joints Using Failure Assessment Diagram

    Science.gov (United States)

    Flom, Yury

    2012-01-01

    Fitness-for service approach was used to perform structural analysis of the brazed joints consisting of several base metal / filler metal combinations. Failure Assessment Diagrams (FADs) based on tensile and shear stress ratios were constructed and experimentally validated. It was shown that such FADs can provide a conservative estimate of safe combinations of stresses in the brazed joints. Based on this approach, Margins of Safety (MS) of the brazed joints subjected to multi-axial loading conditions can be evaluated..

  4. JUPITER PROJECT - JOINT UNIVERSAL PARAMETER IDENTIFICATION AND EVALUATION OF RELIABILITY

    Science.gov (United States)

    The JUPITER (Joint Universal Parameter IdenTification and Evaluation of Reliability) project builds on the technology of two widely used codes for sensitivity analysis, data assessment, calibration, and uncertainty analysis of environmental models: PEST and UCODE.

  5. Wrist rhythm during wrist joint motion evaluated by dynamic radiography.

    Science.gov (United States)

    Kawashima, Hiroki; Tada, Kaoru; Suganuma, Seigo; Tsuchiya, Hiroyuki; Sanada, Shigeru

    2014-01-01

    We hypothesized that wrist joint motion involves a "wrist rhythm" similar to the scapulohumeral rhythm. Therefore, we used a flat-panel detector to evaluate the ratio of radiolunate and capitolunate joint motions during wrist joint motion by dynamic radiography. The subjects were 20 healthy men. Dynamic imaging of the wrist joint was performed during active exercise for a total of ten seconds. In this study, we defined the radiocarpal (RL angle) and midcarpal joint angle (CL angle) as the wrist joint angle in the obtained images and measured the variation of these angles. The average curve was plotted and regression lines calculated from the average curve. The ratio was calculated from the slopes of the regression lines of the RL CL angles. These findings indicated that the ratio of the RL and CL angle motions was approximately 1:4 during palmar flexion and approximately 2:1 during dorsiflexion.

  6. Biomechanical evaluation of 3 stabilization methods on acromioclavicular joint dislocations.

    Science.gov (United States)

    Nüchtern, Jakob V; Sellenschloh, Kay; Bishop, Nick; Jauch, Sabrina; Briem, Daniel; Hoffmann, Michael; Lehmann, Wolfgang; Pueschel, Klaus; Morlock, Michael M; Rueger, Johannes M; Großterlinden, Lars G

    2013-06-01

    Traumatic acromioclavicular (AC) joint dislocations can be addressed with several surgical stabilization techniques. The aim of this in vitro study was to evaluate biomechanical features of the native joint compared with 3 different stabilization methods: locking hook plate (HP), TightRope (TR), and bone anchor system (AS). The HP provides higher stiffness than the anatomic reconstruction techniques. Controlled laboratory study. A new biomechanical in vitro model of the AC joint was used to analyze joint stability after surgical repair (HP, TR, and AS). Eighteen cadaveric specimens were randomized for bone density and diameter in the midclavicle section. Joint stiffness was measured by applying an axial load and a defined physiological range of motion for internal and external rotations and upward and downward rotations. Data were recorded at 3 stages: for the native joint after dissecting the AC ligaments, directly after repair, and after axial cyclic loading (1000 cycles with 20 and 70 N at 1 Hz). To evaluate which implant mimics physiological joint properties best, axial stiffness of vertical stability was assessed in combination with rotation. Finally, static loading in the superior direction was applied until failure of the joints occurred. Axial stiffness of the TR and AS groups was 2-fold higher than for the HP group and the native joint (67.1, 66.1, and 22.5 N/mm, respectively; P < .004). Decreased load-to-failure rates were recorded in the HP group compared with the TR and AS groups (248.9 ± 72.7, 832.0 ± 401.4, and 538.0 ± 166.1 N, respectively). The stiffness of the rotations was not significantly different between the treatment methods but was lower in horizontal and downward rotations compared with the native state. Thus, native AC ligaments contributed a significant share to joint stiffness. The TR and AS groups demonstrated higher vertical load capacity. Compared with the TR and AS, the HP demonstrated an axial stiffness closest to the native

  7. Ultrasonographic evaluation of the coxofemoral joint region in young foals.

    Science.gov (United States)

    Rottensteiner, U; Palm, F; Kofler, J

    2012-02-01

    The purpose of this study was to map the coxofemoral region in foals to obtain ultrasonographic reference values for the interpretation of potentially pathological findings in hip joints. Using a 7.5 MHz linear transducer, 38 examinations were carried out: 10 (20 joints) on cadavers and 28 (55 joints) on live healthy foals up to 8 weeks of age. The chosen plane of examination was caudolateral-craniomedial oblique on an imaginary line connecting the greater trochanter and the cranial edge of the tuber sacrale. The relatively thin muscular layer covering the coxofemoral joint allowed good image quality. The evaluated structures included the bone surface of the ilium and acetabulum, the subchondral bone on the femoral head and greater trochanter, the joint cartilage on the femoral head, the fibrocartilaginous acetabular labrum, the femoral capital physis, the cartilaginous layer covering the greater trochanter, the joint capsule and the presence of visible synovial fluid and the gluteal muscles. A bilateral anatomical frozen section in the plane of examination was made in one cadaver. A good correlation was found between ultrasonographic and corresponding anatomical measurements on the frozen section. This study indicated that ultrasound is a valuable diagnostic tool which can provide good image quality in neonates. Copyright © 2011 Elsevier Ltd. All rights reserved.

  8. Global body posture evaluation in patients with temporomandibular joint disorder

    Directory of Open Access Journals (Sweden)

    Eliza Tiemi Saito

    2009-01-01

    Full Text Available AIM: To identify the relationship between anterior disc displacement and global posture (plantar arches, lower limbs, shoulder and pelvic girdle, vertebral spine, head and mandibles. Common signs and symptoms of anterior disc displacement were also identified. INTRODUCTION: Global posture deviations cause body adaptation and realignment, which may interfere with the organization and function of the temporomandibular joint. METHODS: Global posture evaluation was performed in a group of 10 female patients (20 to 30 years of age with temporomandibular joint disc displacement and in a control group of 16 healthy female volunteers matched for age, weight and height. Anterior disc displacement signs, symptoms and the presence of parafunctional habits were also identified through interview. RESULTS: Patients with disc displacement showed a higher incidence of pain in the temporomandibular joint area, but there were no differences in parafunctional habits between the groups. In the disc displacement group, postural deviations were found in the pelvis (posterior rotation, lumbar spine (hyperlordosis, thoracic spine (rectification, head (deviation to the right and mandibles (deviation to the left with open mouth. There were no differences in the longitudinal plantar arches between the groups. CONCLUSION: Our results suggest a close relationship between body posture and temporomandibular disorder, though it is not possible to determine whether postural deviations are the cause or the result of the disorder. Hence, postural evaluation could be an important component in the overall approach to providing accurate prevention and treatment in the management of patients with temporomandibular disorder.

  9. Evaluation of gait kinetics in puppies with coxofemoral joint laxity.

    Science.gov (United States)

    Lopez, Mandi J; Quinn, Margaret M; Markel, Mark D

    2006-02-01

    To characterize ground reaction forces (GRFs) and determine whether there were correlations between forces and passive coxofemoral joint laxity in puppies. Fifty-one 16-week-old hound-breed dogs. Force-plate gait evaluation and distraction radiographic imaging were performed. Ground reaction forces evaluated included x (mediolateral), y (craniocaudal breaking and propulsion), and z (vertical) peak force and impulse. Z-plane limb loading and unloading rates, loading interval, and weight distribution and y-plane stance time breaking and propulsion percentages were calculated. One-way ANOVA with the Duncan multiple range test was used to evaluate differences in gait variables among limbs. The relationships of left, right, highest, and mean distraction index (DI) with individual limb data of each dog were evaluated with the Spearman rank correlation. Left and right DIs were compared by means of linear regression analysis. Mean +/- SEM DI was 0.67 +/- 0.02. Left and right DIs were strongly correlated, but there were no significant relationships between DIs and gait variables. Most fore- and hind limb gait variables differed significantly, whereas paired fore- and hind limb gait variables did not. Asymmetry was most pronounced in the x- and y-planes. GRFs were consistent with those of clinically normal mature dogs, supporting an absence of association between GRF and DI in young dogs. The GRFs and elucidation of the relationship between GRFs and DI may be useful for future studies in immature dogs.

  10. Evaluering

    DEFF Research Database (Denmark)

    Wahlgren, Bjarne; Andersen, Michael; Wandall, Jakob

    Idéen til denne bog opstod i forbindelse med undervisningen i evaluering af uddannelse på Århus Universitet. Vi oplevede, at der nok fandtes megen litteratur om evaluering, både på dansk og især engelsk, men ikke meget litteratur, der på en overskuelig og dækkende måde kunne bruges som indføring i...... det brede felt, som bogen dækker. En del dansksproget evalueringslitteratur drejer sig om programevaluering på et mere generelt niveau. Meget af denne litteratur har fokus på offentlig virksomhed, men kun i mindre grad på uddannelse. En del litteratur omhandler evaluering af undervisning, en del har...... fokus på elevers læring. Vi har villet skrive en bog, der dækker hele feltet: Evaluering af læring, undervisning og uddannelse. Vi har med bogen villet skabe overblik over dette omfattende felt, som udvikler sig i mange retninger. Dette ud fra den opfattelse, at evaluering får stadig større betydning...

  11. Radiological Evaluation of Temporomandibular Joint Disorders Followed by Clinical Symptoms

    Energy Technology Data Exchange (ETDEWEB)

    Park, Tae Won; You Dong Soo [Dept. of Oral Radiology, College of Dentistry, Seoul National University, Seoul (Korea, Republic of)

    1989-11-15

    The authors analyzed the clinical findings, radiological findings and their correlations in the temporomandibular joint disorders. 1. The most prevalent age group was in the first decade, then the second decade and the third decade. Female were more common with a ratio of 3.4 : 1. 2. The most common clinical findings was the pain on open mouth position (42.43%), then came the clicking and limitation of mouth opening. 3. The most common bone change on the condyle side was the erosion, then came the flattening, the osteopyte and the sclerosis in that orders. 4. In the case of the crepitus, the coarse crepitus showed more radiological change than the fine crepitus. 5. In the case of the mouth opening limitation, the evaluation of the translatory movement by transcranial projection was in accordance with the clinical evaluation. 6. The correlation between the clinical symptom and the condylar position within the mandibular fossa was not present and in the case of diagnosis of disc displacement, the transcranial projection seemed not to be able to substitute for the arthrography. 7. Radiographically, the most prevalent age group which showed the bone change was in the first, the second and the third decade. And the bone change seemed to have no relationship with aging.

  12. Evaluation of cold crack susceptibility on HSLA steel welded joints

    Directory of Open Access Journals (Sweden)

    Silverio-Freire Júnior, R. C.

    2003-04-01

    Full Text Available The present study addresses an evaluation of the effect of several welding parameters on cold cracking formation in welded joints of High Strength and Low Alloy steels, as well as the resulting microstructures and hardness values. The main parameters studied include the variation of the preheating temperature, drying time of the electrode, chemical composition and thickness of the base metal. The presence of cold cracking in the joints was analyzed from Tekken tests using steel plates made of SAR 80 T, 100 T and 120 T with of various thickness. The plates were welded by Shielded Metal Arc Welding either with or without pre-heating. Different preheating temperatures were studied, i.e., 375, 455 and 525 K. AWS E 12018 G and 11018 G electrodes were used under different conditions, i.e., not dried or dried up to 2, 3 and 4 h at 515 K. The results indicated the presence of cracks in the welded metals with the combination of hardness values above 230 HV and the formation of high contents of acicular ferrite (above 93 % in the welds without preheating. Higher crack susceptibility was also observed in the thick welded metal plates.

    Este trabajo evalúa la influencia de la variación de temperatura de precalentamiento, del tiempo de secado del electrodo, de la composición química y del espesor del metal base sobre la formación de fisuras en frío, inducidas por el hidrógeno en juntas soldadas de aceros de alta resistencia y baja aleación y su relación con la microestructura y dureza resultante. Para esto, se analizó la presencia de fisuras en frío en probetas para ensayos Tekken, fabricadas a partir de chapas de aceros SAR 80 T, 100 T y 120 T, con diferentes espesores y soldados por proceso de arco eléctrico con electrodo revestido, sin precalentamiento y con precalentamiento, a 375, 455 y 525 K, empleando electrodos AWS E 12018 G y 11018 G no secados y secados durante 2, 3 y 4 h. Los resultados obtenidos indicaron la presencia de fisuras

  13. Radiographic evaluation of feline appendicular degenerative joint disease vs. Macroscopic appearance of articular cartilage.

    Science.gov (United States)

    Freire, Mila; Robertson, Ian; Bondell, Howard D; Brown, James; Hash, Jon; Pease, Anthony P; Lascelles, B Duncan X

    2011-01-01

    Degenerative joint disease (DJD) is common in domesticated cats. Our purpose was to describe how radiographic findings thought to indicate feline DJD relate to macroscopic cartilage degeneration in appendicular joints. Thirty adult cats euthanized for reasons unrelated to this study were evaluated. Orthogonal digital radiographs of the elbow, tarsus, stifle, and coxofemoral joints were evaluated for the presence of DJD. The same joints were dissected for visual inspection of changes indicative of DJD and macroscopic cartilage damage was graded using a Total Cartilage Damage Score. When considering all joints, there was statistically significant fair correlation between cartilage damage and the presence of osteophytes and joint-associated mineralizations, and the subjective radiographic DJD score. Most correlations were statistically significant when looking at the different joints individually, but only the correlation between the presence of osteophytes and the subjective radiographic DJD score with the presence of cartilage damage in the elbow and coxofemoral joints had a value above 0.4 (moderate correlation). The joints most likely to have cartilage damage without radiographic evidence of DJD are the stifle (71% of radiographically normal joints) followed by the coxofemoral joint (57%), elbow (57%), and tarsal joint (46%). Our data support radiographic findings not relating well to cartilage degeneration, and that other modalities should be evaluated to aid in making a diagnosis of feline DJD. © 2011 Veterinary Radiology & Ultrasound.

  14. Evaluation of Longitudinal Joints of HMA Pavements in Tennessee

    Science.gov (United States)

    2010-05-01

    Longitudinal joints between lanes of hot-mix asphalt (HMA) pavements are commonly susceptible to moisture damage and other failures. In 2006, the Tennessee Department of Transportation (TDOT) identified longitudinal joint failure as one of the major ...

  15. Magnetic resonance imaging-based temporomandibular joint space evaluation in temporomandibular disorders

    Energy Technology Data Exchange (ETDEWEB)

    Nah, Kyung Soo [Pusan National Univ. College of Dentistry, Pusan (Korea, Republic of)

    2007-03-15

    Disc and condylar position were observed on MRIs of temporomandibular joint disorder patients and condylar position agreement between MRI and tranascranal radiography was evaluated. MRI and transcranial radiographs of both TM joints from 67 patients with temporomandibular disorder were used. On MRI, the position and shape of disc and condylar position as anterior, middle, posterior was evaluated at medial, center, and lateral views. On transcranial radiographs, condylar position was evaluated using the shortest distance from condyle to fossa in anterior, superior, and posterior directions. 1. On MRI, 96 joints (71.6%) of 134 had anterior disc dispalcement with reduction and 38 joints (28.4%) without reduction. 2. Fourteen (14.6%) of 96 reducible joints showed anterior condylar position. 19 (19.8%) showed central position, 63 joints (65.6%) showed posterior position. Two joints (5.3%) of 38 non-reducible joints showed anterior condylar position, while 9 (23.7%) showed central position, and 27 (71.1%)-posterior position. 3. In 85 joints (63.4%) of 134, the transcranial condylar position agreed with that of the central MRI view, 10 joints (7.5%) with that of medial, 16 joints (11.6%) with that of lateral, and 23 joints (17.2%) disagreed with that of MRI. On MRI, most of the reducible and non-reducible joints showed posterior condylar position. Transcranial radiographs taken with machine designed for TMJ had better agreement of condylar position with that of MRI. Extremely narrow joint spaces or very posterior condylar positions observed on transcranial radiographs had a little more than fifty percent agreement with those of MRIs.

  16. The Coupling Fields Characteristics of Cable Joints and Application in the Evaluation of Crimping Process Defects

    Directory of Open Access Journals (Sweden)

    Fan Yang

    2016-11-01

    Full Text Available The internal defects of cable joints always accelerate the deterioration of insulation, until finally accidents can arise due to the explosion of the joints. The formation process of this damage often involves changes in the electromagnetic, temperature and stress distribution of the cable joint, therefore, it is necessary to analyze the electromagnetic-thermal-mechanical distribution of cable joints. Aiming at solving this problem, the paper sets up a 3-D electromagnetic-thermal-mechanical coupling model of cable joints under crimping process defects. Based on the model, the electromagnetic losses distribution, temperature distribution and stress distribution of a cable joint and body are calculated. Then, the coupling fields characteristics in different contact coefficient k, ambient temperature Tamb and load current I were analyzed, and according to the thermal-mechanical characteristics of a cable joint under internal defects, the temperature difference ΔTf and stress difference Δσf of cable surface are applied to evaluate the internal cable joint defects. Finally, a simplified model of the cable joint is set up to verify the accuracy of the coupling field model proposed in this paper, which indicates that the model can be used to analyze the coupling fields characteristics of cable joints and the method can be applied to evaluate crimping process defects of cable joints.

  17. Evaluation of the coracoclavicular reconstruction using LARS artificial ligament in acute acromioclavicular joint dislocation.

    Science.gov (United States)

    Lu, Nan; Zhu, Lei; Ye, Tianwen; Chen, Aimin; Jiang, Xi; Zhang, Zhiling; Zhu, Qinghua; Guo, Qinghe; Yang, Di

    2014-09-01

    The most appropriate procedure for surgical treatment of severe acromioclavicular (AC) joint dislocation was still not clear. The purpose of this study is to evaluate the outcomes of coracoclavicular (CC) reconstruction with ligament augmentation and reconstruction system (LARS) artificial ligaments for the treatment of acute complete AC joint dislocation. Twenty-four patients (16 male and 8 female, ages ranged from 21 to 45) with acute complete AC joint dislocations were treated with CC reconstruction using LARS artificial ligaments. All these dislocations were unstable injuries. Clinical evaluation was used by the Constant scores and VAS. The radiographic evaluation consisted of Zanca radiographs for bilateral AC joint and axillary radiographs for the injured shoulder. All patients had follow-up times of 36 months (range 6-60). The Constant scores rose from 62.3 ± 6.9 preoperatively to 94.5 ± 9.3 at final evaluation (P dislocations. IV.

  18. BUILDING MODEL ANALYSIS APPLICATIONS WITH THE JOINT UNIVERSAL PARAMETER IDENTIFICATION AND EVALUATION OF RELIABILITY (JUPITER) API

    Science.gov (United States)

    The open-source, public domain JUPITER (Joint Universal Parameter IdenTification and Evaluation of Reliability) API (Application Programming Interface) provides conventions and Fortran-90 modules to develop applications (computer programs) for analyzing process models. The input ...

  19. Evaluation of longitudinal construction joints on traffic operations and safety.

    Science.gov (United States)

    2009-01-01

    Motorists generally follow the guidance provided by pavement markings, which are normally marked in : coincidence with the longitudinal construction joints, when the markings are necessary. At some locations, : however, there may be a difference betw...

  20. Stress radiographs in the evaluation of degenerative femorotibial joint disease

    Energy Technology Data Exchange (ETDEWEB)

    Tallroth, K.; Lindholm, T.S.

    1987-11-01

    Thirty-eight osteoarthrotic knees were examined to assess the widths of the femorotibial joint spaces. Radiographs were exposed with the patient lying, in a standing position, and with an adduction and abduction force. Forced compression of the osteoarthrotic joint compartment caused, on average, 18% greater narrowing than when loading it in the standing position. Compared to the joint space at rest, the non-weight-bearing compartment widened by 16% in the standing position and narrowed by 20% when stress was applied. Furthermore, the results showed an increase in laxity proportional to the degree of arthrosis. Stress radiographs significantly display the real cartilage width of both joint compartments. Knowledge of the condition of the articular cartilage in the non-weight-bearing compartment is important when considering a transfer of loading stresses by means of osteotomy. (orig.)

  1. Clinical study evaluating the accuracy of injecting the distal tarsal joints in the horse.

    Science.gov (United States)

    Seabaugh, K A; Selberg, K T; Mueller, P O E; Eggleston, R B; Peroni, J F; Claunch, K M; Markwell, H J; Baxter, G M

    2017-09-01

    Osteoarthritis (OA) of the centrodistal (CD) and tarsometatarsal (TMT) joints is a common cause of lameness in horses. Intra-articular diagnostic anaesthesia and/or therapeutic injection are relied upon to help diagnose and treat many horses with OA of these joints. The objective of this study was to determine the accuracy of arthrocentesis of the CD and TMT joints using a sample population of equine surgeons and surgery residents. Randomised experimental study. Six operators each injected four CD and four TMT joints in 12 sedated horses. The operators were randomly assigned to inject either the left CD and right TMT or the right CD and left TMT on four randomly assigned horses. The joints were injected with a 4 ml solution of contrast medium (2 ml), sterile saline (1.5 ml) and amikacin (0.5 ml). A minimum of two radiographs of each joint was obtained to evaluate the presence of contrast medium within the target joint. The TMT joint was successfully injected in 23/24 joints (96% accuracy). The CD joint was successfully injected in 10/24 joints (42% accuracy). Communication between the TMT and CD joints was visible in 26% of successful TMT injections. Communication between the CD and TMT joints was visible in 20% of successful CD injections. Despite specific requests to do so, we were unable to standardise the injection technique across all operators. The accuracy of injecting the TMT and CD joints of sedated horses was 96 and 42%, respectively. The CD joint was frequently missed with contrast medium being placed in the periarticular tissues. These data support the clinical impression of the difficulty of injecting the CD joint and suggests that practitioners should utilise ancillary methods, such as radiographs, to ensure proper needle placement. © 2017 EVJ Ltd.

  2. Non destructive evaluation of adhesively bonded carbon fiber reinforced composite lap joints with varied bond quality

    Science.gov (United States)

    Vijayakumar, R. L.; Bhat, M. R.; Murthy, C. R. L.

    2012-05-01

    Structural adhesive bonding is widely used to execute assemblies in automobile and aerospace structures. The quality and reliability of these bonded joints must be ensured during service. In this context non destructive evaluation of these bonded structures play an important role. Evaluation of adhesively bonded composite single lap shear joints has been attempted through experimental approach. Series of tests, non-destructive as well as destructive were performed on different sets of carbon fiber reinforced polymer (CFRP) composite lap joint specimens with varied bond quality. Details of the experimental investigations carried out and the outcome are presented in this paper.

  3. Single and joint action toxicity evaluation of insecticide and laundry ...

    African Journals Online (AJOL)

    Further analysis based on the isobologram model was in conformity with RTU and SR models. The significance of this study showed the relevance of joint action toxicity studies in setting realistic safe limits in order to protect aquatic organisms. Therefore, proper disposal and management strategies for wastes should be ...

  4. Evaluation of extraarticular consequences of Temporomandibular joint disorders

    Directory of Open Access Journals (Sweden)

    Sh. Jafari

    1994-07-01

    Full Text Available Temporo Mandibular Joint disorders are the most important ethiologic factor for chronic orofacial pain and have a relatively new place in scientific researches and clinical studies in dentistry. Since dentists can play an important role in diagnosis and treatment of these disorders, routine dental examination should include functional examination of osteomatognatic apparatus.

  5. Variability and Similarity of Gait as Evaluated by Joint Angles

    DEFF Research Database (Denmark)

    Yang, Sylvia X M; Larsen, Peter Kastmand; Alkjær, Tine

    2014-01-01

    Closed-circuit television (CCTV) footage is used in criminal investigations to compare perpetrators with suspects. Usually, incomplete gait cycles are collected, making evidential gait analysis challenging. This study aimed to analyze the discriminatory power of joint angles throughout a gait cycle....... Six sets from 12 men were collected. For each man, a variability range VR (mean ± 1SD) of a specific joint angle at a specific time point (a gait cycle was 100 time points) was calculated. In turn, each individual was compared with the 11 others, and whenever 1 of these 11 had a value within...... this individual’s VR, it counted as positive. By adding the positives throughout the gait cycle, we created simple bar graphs; tall bars indicated a small discriminatory power, short bars indicated a larger one. The highest discriminatory power was at time points 60–80 in the gait cycle. We show how our data can...

  6. Joint Service Aircrew Mask (JSAM) Extended Wear Comfort Evaluation

    Science.gov (United States)

    2009-10-01

    mounted components AIRSAVE vest CRU-93/A oxygen regulator (centrifuge mounted component) PCU-15/P torso harness LPU -36/P life preserver (USAF...and Navy fighter/attack only) LPU -10/P life preserver (USAF, Navy, and USA bomber/tanker/transport only) CRU-94/P oxygen connector Joint...shoulders slight Left shoulder has discomfort from vest and LPU . Can get some relief with adjustment. 5 13-right side of head moderate Hot spot

  7. Magnetic resonance evaluation of nonsurgical treatment for internal derangement with closed lock of the temporomandibular joint

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    Chiba, Masatoshi; Kumagai, Masahiro; Takahashi, Tetsu; Teshima, Teiichi (Tohoku Univ., Sendai (Japan). School of Dentistry)

    1994-02-01

    This study used 1.5 Tesla magnetic resonance imaging (MRI) to evaluate the positional and morphological changes of the disc and condyle in patients with closed lock treated nonsurgically. A total of 20 joints (19 patients) which were successfully unlocked by nonsurgical treatment were studied. Nonsurgical treatment was gradually applied a follows: mandibular manipulation, anterior splint assisted manipulation, pumping manipulation, and stabilization splint therapy. The joints were evaluated by MRI in the closed-and open-mouth positions before and after treatment. Post-treatment MRI was also performed with the splint in place. Each imaging procedure was made in the same sagittal plane. After treatment, 19 patients experienced significant improvement in pain, range of motion, and mandibular dysfunction. Post-treatment MRI revealed that only one joint was normal. Six joints had anterior disc displacement with reduction (DWR), and 13 joints had anterior disc displacement without reduction (DNR). Evidence of disc repositioning with the splint in place was seen in 4 joints in the DWR group. Disc mobility increased with improved condylar translation in 19 joints. Disc deformity progressed in 10 joints of the DNR group. These results suggest that successful treatment for internal derangement with closed lock may require an increase in the mobility of the disc, regardless of disc position. (Author).

  8. Photoacoustic evaluation of human inflammatory arthritis in human joints

    Science.gov (United States)

    Jo, Janggun; Xu, Guan; Marquardt, April; Girish, Gandikota; Wang, Xueding

    2017-03-01

    Photoacoustic (PA) imaging combined with ultrasonography (US) holds promise to offer a novel and powerful tool for clinical management of inflammatory arthritis, including early detection and treatment monitoring. As a complement to US, PA imaging can assess additional hemodynamic changes in inflammatory synovium, including hyperemia and hypoxia, both important and early physiological biomarkers of synovitis reflecting the increased metabolic demand and the relatively inadequate oxygen delivery of the inflammatory synovial tissue. In this study on arthritis patients and normal volunteers, the targeted metacarpophalangeal (MCP) joints were imaged using our real-time US-PA dual-modality imaging system. The blood volume and the blood oxygenation in the segmented synovium were quantified, and the results from the arthritis patients were compared to those from the normal volunteers. This initial study on human subjects demonstrated that PA imaging, by working at the optical wavelengths that are sensitive to oxygenated and deoxygenated hemoglobin, is capable of identifying and characterizing inflammation in joints based on the detection of hemodynamic changes.

  9. An evaluation of charity care for tax-exempt hospitals engaging in joint ventures.

    Science.gov (United States)

    Smith, Pamela C

    2006-01-01

    The study examines whether the level of charity care and financial stability contribute to a nonprofit hospital's motivation for partnering with a for-profit hospital through a joint venture. The Internal Revenue Service (IRS) has heightened its scrutiny of joint ventures within the health care sector. Considering recent calls to investigate the merit of the tax-exempt status of hospitals engaged in joint ventures, this research will assist policy makers in the evaluation of nonprofit hospitals. Constituents will continue to question whether joint ventures contribute to a reduced focus on charitable activities. Results indicate that the propensity to engage in a joint venture significantly increases with increased levels of charity care. Furthermore, nonprofit hospitals with lower profitability are more likely to engage in joint ventures. These results are useful to policy makers when evaluating the level of charity care provided by hospitals seeking alternative strategic alliances. Considering many critics allege hospitals are reducing the provision of charity care to the community, it is imperative for management to be conscious of the impact of joint ventures on the provision of charity care.

  10. Numerical and microstructural evaluation of 9%Cr welded joints

    Energy Technology Data Exchange (ETDEWEB)

    Sawada, K. [National Institute for Materials Science (Japan); Bauer, M.; Kauffmann, F.; Klenk, A. [Stuttgart Univ. (Germany). MPA

    2008-07-01

    Microstructural changes after creep at 600 C were investigated on E911 welded joints, focusing on the influence of multiaxiality of stress on microstructure of the fine-grained heat-affected zone (FGHAZ). In FGHAZ, more creep voids were observed in the interior portion of the specimen, compared with the outer surface. This is due to the higher multiaxiality of stress in the interior portion. There was no significant growth of VX particles during creep because of their higher thermal stability in base metal and FGHAZ. For M{sub 23}C{sub 6}, the growth during creep in FGHAZ was faster than in the base metal. There was no large difference in the growth rate of M{sub 23}C{sub 6} between the interior portion and near the outer surface. The number of Z-phase particles after creep in the base metal was higher than that in the FGHAZ. For FGHAZ, the number of Z-phase particles was higher in the interior portion of the specimen in contrast with near the outer surface. Increase in subgrain size and decrease in dislocation density were observed after creep in the base metal and the FGHAZ. For FGHAZ, the subgrain size and dislocation density after creep in the interior portion were almost the same as near the outer surface. (orig.)

  11. Evaluation of occlusal factors in patients with temporomandibular joint disorder

    Directory of Open Access Journals (Sweden)

    Max Dória Costa

    2012-12-01

    Full Text Available OBJECTIVE: The aim of this study was to determine the prevalence and the relation between the main occlusal factors and the temporomandibular disorder (TMD. METHODS: We analyzed 100 patients (50 diagnosed with TMD and 50 asymptomatic volunteers, control group through a questionnaire that classified TMD as absent, mild, moderate and severe. Then, an evaluation was made of intraoral occlusal factors: Absence of posterior teeth, wear facets, overjet, overbite, open bite, posterior crossbite, sagittal relationship (Class I, II and III, centric relation discrepancy for maximum intercuspation, anterior guidance and balancing occlusal interference. The c² examined the association between TMD and considered occlusal variables. RESULTS: The prevalence of studied occlusal factors was higher in patients with moderate and severe TMD. Statistically significant results were found on: Absence of five or more posterior teeth, overbite and overjet greater than 5 mm, edge-to-edge bite, posterior crossbite, Class II and III, the absence of effective anterior guide and balancing side interferences. CONCLUSIONS: Indeed, it is concluded that there is a relationship between TMD and occlusal factors, however it can not be told to what extent these factors are predisposing, precipitating or perpetuating the disease. Therefore, despite its multifactorial etiology, one can not neglect the occlusal analysis of these patients.OBJETIVO: o presente estudo teve como objetivo verificar a prevalência e relação dos principais fatores oclusais com a disfunção temporomandibular. MÉTODOS: foram analisados 100 pacientes (50 com diagnóstico de DTM e 50 voluntários assintomáticos, grupo controle através de um questionário para classificação do grau de DTM, em ausente, leve, moderada e severa. Em seguida, foi realizada uma avaliação intrabucal dos fatores oclusais ausência de dentes posteriores, facetas de desgaste, overjet, overbite, mordida aberta anterior, mordida

  12. [Evaluation of treatment outcomes in tuberculosis of knee and hip joints in 2005-2012].

    Science.gov (United States)

    Chocholáč, D; Kala, B; Gallo, J; Netval, M; Chaloupka, R

    2013-01-01

    Tuberculosis (TB) in a joint region presents high risk of damage to the joint. Consequences of a late diagnosis and inadequate therapy may be serious particularly in the large joints of lower extremities. Tuberculosis of knee and hip joints accounts for about 25% to 35% of osteoarticular tuberculosis (OAT). The aim of this study was to evaluate the objective and subjective results of tuberculosis treatment in knee and hip joints. Of 258 OAT patients treated at the Specialised Treatment Centre Jevíčko between January 2005 and September 2012, tuberculosis of the hip joint was diagnosed in 31 patients in whom three hips were treated by incision and drainage and 10 by total hip replacement; 18 patients had tuberculosis of the knee joint with the following treatment: puncture in seven knees, incision and drainage in eight, excochleation of a tuberculous focus in the proximal tibia in two, removal of a bursa in one, arthrodesis in four and total knee replacement in four patients. The patients continued to be followed up at the Jevíčko Centre. The scale of 1 to 5 (best to worst) was established for evaluation of objective and subjective results of the treatment. The data were analysed using the basic statistical characteristics and compared. The objective evaluation was better for the hip joint; the sums of relative frequencies of marks 1 to 3 were 72.22% in the knee and 80.65% in the hip. In the knee more than 50% of the cases fell in the interval , in the hip this was . The hip joint was better subjectively evaluated, it had a higher sum of relative frequencies of marks 1 to 3, i.e., 96.77% as compared with 88.89% for the knee. In the knee more than 50% of the cases had marks in the interval ; in the hip this was . The hip joint was better evaluated both objectively and subjectively. An early diagnosis allows for the treatment of synovitis, which has a better prognosis than an arthritic disease. The subjective perception of treatment results showed a better

  13. Dynamic radiologic evaluation of horizontal instability in acute acromioclavicular joint dislocations.

    Science.gov (United States)

    Tauber, Mark; Koller, Heiko; Hitzl, Wolfgang; Resch, Herbert

    2010-06-01

    Biplane radiologic evaluation is indispensable for the correct diagnosis of acute acromioclavicular (AC) joint injuries. Thus far, no functional radiographic techniques have been quantified to evaluate horizontal instability in acute AC joint dislocations. Supine dynamic axillary lateral shoulder views detect horizontal instability of the distal clavicle in patients with acute AC joint dislocations. Cohort study (Diagnosis); Level of evidence, 2. Twenty-five consecutive patients with a mean age of 39 +/- 14 years with acute AC joint injury underwent biplane radiologic evaluation, including a conventional Zanca view and an axillary lateral view in a sitting position. In addition, supine axillary lateral views with the arm in 90 degrees of abduction and 60 degrees of flexion and extension were taken to evaluate the horizontal dynamics of the distal clavicle. The gleno-acromio-clavicular angle (GACA) was introduced and used to quantify the horizontal clavicular dynamics in terms of angle differences. The unaffected shoulders served as the control group. Superior dislocation of the lateral clavicle in the Zanca view was classified as Rockwood type II in 7 patients, type III in 15, and type V in 3. The axillary lateral view in a sitting position showed posterior dislocation of the distal clavicle in 8 patients (Rockwood type IV injury). Dynamic radiologic evaluation revealed an average GACA difference between the neutral and anterior position of the arm of 7.1 degrees +/- 5.5 degrees for the unaffected shoulder. In the injured AC joints, 11 patients showed no radiologic evidence of horizontal instability (group A) with a GACA difference of 7.1 degrees +/- 4.8 degrees . Increased anteroposterior translation was evident in 14 patients (group B) with a GACA difference of 30.3 degrees +/- 14.3 degrees (P < .001). Functional axillary radiologic evaluation seems to represent a simple imaging tool to reveal dynamic horizontal instability. Horizontal instability of the distal

  14. Evaluation of mechanical strength of the joints in JT-60 toroidal field coil conductors

    Science.gov (United States)

    Nishio, S.; Ohkubo, M.; Sasajima, H.

    1980-04-01

    Toroidal field (TF) coils of JT-60 produce a toroidal field of 45 KG at a plasma axis, they have an inner bore of 3.90 m and a weight of about 80 metric tons per coil. Eighteen TF coils are located around a torus axis at regular intervals. TF coil conductors are mostly jointed by high frequency induction brazing, the rest jointed by welding. In deciding the details of the jointing procedures, the conductor size and the requested mechanical strength are mainly taken into consideration. Described are non-destructive inspection methods for the brazed joints, strength evaluation, and the inspection criteria. Ultrasonic testing method is found to be the most effective in evaluation of mechanical properties of the brazed joints especially in terms of fatigue strength. The ultrasonic inspection method and the detectability of this apparatus are described in detail, and the defects of known size are compared with the indication values and display figures. The apparatus developed for JT-60 is operated automatically also recording the inspection results. Mechanical strength of the brazed joints with initial defects is discussed.

  15. Does evaluation of the ligamentous compartment enhance diagnostic utility of sacroiliac joint MRI in axial spondyloarthritis?

    DEFF Research Database (Denmark)

    Weber, Ulrich; Maksymowych, Walter P; Chan, Stanley M

    2015-01-01

    in the ligamentous compartment and their potential diagnostic utility in axial SpA. We therefore aimed to evaluate the ligamentous compartment on sacroiliac joint MRI for lesion distribution and potential incremental value towards diagnosis of SpA over and above the traditional assessment of the cartilaginous...

  16. Evaluation of serum cytokines in cats with and without degenerative joint disease and associated pain.

    Science.gov (United States)

    Gruen, Margaret E; Messenger, Kristen M; Thomson, Andrea E; Griffith, Emily H; Aldrich, Lauren A; Vaden, Shelly; Lascelles, B Duncan X

    2017-01-01

    Degenerative joint disease is common in cats, with signs of pain frequently found on orthopedic examination and radiographs often showing evidence of disease. However, understanding of the pathophysiology of degenerative joint disease and associated pain remains limited. Several cytokines have been identified as having a role in pain in humans, but this has not been investigated in cats. The present study was performed to use a multiplex platform to evaluate the concentration of 19 cytokines and chemokines in serum samples obtained from cats with and without degenerative joint disease and associated pain. Samples from a total of 186 cats were analyzed, with cats representing a range of severity on radiographic and orthopedic evaluations and categorized by degenerative joint disease scores and pain scores. Results showed that cats with higher radiographic degenerative joint disease scores have higher serum concentrations of IL-4 and IL-8, while cats with higher orthopedic exam pain scores have higher concentrations of IL-8, IL-2, and TNF-α; increased concentration of IL-8 in degenerative joint disease and pain may be confounded by the association with age. Discriminant analysis was unable to identify one or more cytokines that distinguish between groups of cats classified based on degenerative joint disease score category or pain score category. Finally, cluster analysis driven by analyte concentrations shows separation of groups of cats, but features defining the groups remain unknown. Further studies are warranted to investigate any changes in cytokine concentrations in response to analgesic therapies, and further evaluate the elevations in cytokine concentrations found here, particularly focused on studies of local cytokines present in synovial fluid. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Dynamic evaluation method of lower limbs joint alignment (MADAAMI for dancers during the plié

    Directory of Open Access Journals (Sweden)

    Kaanda Nabilla Souza Gontijo

    Full Text Available Abstract In classical ballet, the joint misalignments during the plié can generate various injuries. To evaluate potential misalignments during the plié the aim of this study was to present a method for dynamic evaluation of lower limb alignment articulation (called MADAAMI. MADAAMI was validated by 12 experts, and for the evaluation of its reproducibility and for agreement with 3D kinematics, 20 dancers were assessed using a video recording of their plié. For statistical analysis we used the Kappa coefficient (k (p 0.40 and C > 80%, and it is a suitable and valid method for use by the same examiner.

  18. Radiosynoviorthesis of acromioclavicular joint using 169Er-citrate: prospective evaluation of efficacy.

    Science.gov (United States)

    Vereb, Marika; Liepe, Knut; Fischer, Manfred; Kaliska, Lucia; Noskovicova, Lucia; Balogova, Sona

    2018-01-10

    There is a clinical need for therapeutic alternative in patients with persisting painful arthritis of AC-joint and failure of previous treatments. However, no radiopharmaceutical is currently explicitly approved for radiosynoviorthesis of acromioclavicular joint. The aim of our study was to prospectively assess the efficacy and safety of radiosynoviorthesis of acromioclavicular joint using erbium-169 citrate. Radiosynoviorthesis of acromioclavicular joint was performed in 51 consecutive patients (18 males, 33 females) mean age 64.3 (range 43.8-82.6, median 63.6) years with clinically confirmed arthritis of 85 acromioclavicular joints. The efficacy of RSO was reported by patients according to 10-step visual analogue scale of pain (VAS) (0=no pain, 10=most severe pain) at 6 months after radiosynoviorthesis and by ranking the global therapeutic effect of RSO in 4 categories (1=the best effect, 4=no change). To assess the variation of blood perfusion in treated joints, the efficacy of RSO was also evaluated by variation of target (acromioclavicular joint)/non-target (soft tissue) uptake ratio (T/NTR) of metylendiphosphonate (99mTc) measured as number of counts over region of interest on blood pool phase of two-phase bone scintigraphy performed before and 6 months after RSO. Radiosynoviorthesis was followed by significant decrease in VAS, mean -3.1 (-47%). Excellent, good, moderate and bad response was observed in 57(67%), 25 (29%), 1 (1%) and in 2 (2%) of acromioclavicular joints respectively. A significant correlation between decrease of T/NTR and variation of VAS in % (=0.532, parthritis of acromioclavicular joint in whom previous line(s) of treatment did not lead to satisfactory pain relief.

  19. Evaluation of temporomandibular joint disc displacement as a risk factor for osteoarthrosis.

    Science.gov (United States)

    Dias, I M; Cordeiro, P C de F; Devito, K L; Tavares, M L F; Leite, I C G; Tesch, R de S

    2016-03-01

    Temporomandibular joint (TMJ) disc displacement is a clinical sign often found in patients with temporomandibular disorders (TMDs) and associated with TMJ osteoarthrosis. Osteoarthrosis is a degenerative joint disease that may be associated with pain and functional disability. The aim of this study was to evaluate the odds ratio (OR) of joints with disc displacement presenting osteoarthrosis via magnetic resonance imaging (MRI) analysis. In total, 224 TMJ images from patients with signs and symptoms of a TMD were evaluated. The OR, a measure of association, was used to calculate the likelihood of TMJ disc displacement (with or without reduction) with osteoarthrosis. Joints with anterior disc displacement with reduction (ADDwR) and anterior disc displacement without reduction (ADDwoR) were 2.73- and 8.25-times, respectively, more likely to have osteoarthrosis. A nine-times greater likelihood of osteophyte occurrence was observed in cases of ADDwoR, whereas a lower OR for their occurrence (OR 2.96) was observed in cases of ADDwR. The significant OR of joints with disc displacement presenting osteoarthrosis, particularly in cases of ADDwoR, emphasizes the importance of accurate assessment of changes in disc position, which may be associated with other painful and functional disorders of the TMJ. Copyright © 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  20. Evaluating the contributions of muscle activity and joint kinematics to weight perception across multiple joints.

    Science.gov (United States)

    Waddell, Morgan L; Amazeen, Eric L

    2017-08-01

    Perceived heaviness is clearly a function of muscle activity: objects feel heavy, in part because they are lifted with more force than lighter feeling objects. Recent research showed that participants scale their perceptions to the ratio of muscle activity to lift acceleration during elbow lifts (Waddell et al. J Exp Psychol Hum Percept Perform 42:363-374, 2016). The current study sought psychophysiological functions relating perceived heaviness to EMG and peak lift acceleration across multiple lifts employing different muscles as prime movers. Participants lifted objects with three arm lifts-shoulder, elbow, and wrist-and reported perceived heaviness. In each lift, EMG was recorded from the anterior deltoid, biceps brachii, and forearm flexors, and peak angular acceleration was recorded about each joint. The resulting psychophysiological functions revealed the hypothesized ratio of muscle activity to peak lift acceleration in all lifts. Principal component regressions showed that the EMG of the forearm flexors and peak acceleration of the lifting joint were most relevant for perceived heaviness. The special role of forearm flexors in perceiving heaviness across different lifts was interpreted in terms of the invariant structure of the inertia tensor about the wrist.

  1. Non-destructive three-dimensional evaluation of pores at different welded joints and their effects on joints strength.

    Science.gov (United States)

    Nomoto, Rie; Takayama, Yasuko; Tsuchida, Fujio; Nakajima, Hiroyuki

    2010-12-01

    The purpose of this study was to measure the porosity in different laser welded cast alloys non-destructively using X-ray micro-focus computerized tomography (micro-CT) and to evaluate the effect of porosity on the tensile strength of the welded joints. The welding procedure was conducted in rectangular cast metals, CoCr, Ti and platinum added gold alloy (AuPt). The metal plates were butted CoCr to CoCr (CoCr/CoCr) or Ti to Ti (Ti/Ti) for welding of similar metals and Ti to AuPt (Ti/AuPt) for welding of dissimilar metals. Specimens were welded under several laser-welding conditions; with groove (normal), without groove (no groove), spatter, crack, or no overlapped welding (no overlap) (n=5). Porosity in the welded area was evaluated using a micro-CT. Tensile strength of the welded specimens was measured at a crosshead speed of 1mm/min. Multiple comparisons of the group means were performed using ANOVA and Fisher's multiple comparisons test (α=.05). The relationship between the porosity and the tensile strength was investigated with a regression analysis. Three-dimensional images of Ti/AuPt could not be obtained due to metal artifacts and the tensile specimens of Ti/AuPt were debonded prior to the tensile test. All other welded specimens had porosity in the welded area and the porosities ranged from 0.01% to 0.17%. The fractures of most of the CoCr/CoCr and Ti/Ti specimens occurred in the parent metals. Joint strength had no relationship with the porosity in the welded area (R(2)=0.148 for CoCr/CoCr, R(2)=0.088 for Ti/Ti, respectively). The small amount of porosity caused by the laser-welding procedures did not affect the joint strength. The joint strength of Ti/AuPt was too weak to be used clinically. Copyright © 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  2. Genetic conditions of joint Nordic genetic evaluations of lifetime competition performance in warmblood sport horses.

    Science.gov (United States)

    Viklund, Å; Furre, S; Eriksson, S; Vangen, O; Philipsson, J

    2015-08-01

    Breeding programmes for warmblood sport horses are similar in the Nordic countries Sweden, Denmark, Finland and Norway, and stallions of same origin are used. The aim was to investigate whether a joint Nordic genetic evaluation based on lifetime competition performance is feasible and beneficial for breeding competitive sport horses in the Nordic countries. Results for almost 45,000 horses in show jumping and 30,000 horses in dressage were available. The larger populations in Sweden and Denmark contributed with 85% of the results. Heritabilities and genetic correlations between performances in the different countries were estimated, and comparisons of accuracies of estimated breeding values (EBVs) and number of stallions with EBVs based on national or joint data were studied. The heritabilities ranged between 0.25 and 0.42 for show jumping and between 0.14 and 0.55 for dressage. The genetic correlations between competition performances in the Nordic countries were estimated to 0.63-1.00. EBVs based on joint data increased accuracies for EBVs for stallions by 38-81% and increased the number of available stallions with EBVs by 40-288%, compared to EBVs based on national data only. A joint Nordic genetic evaluation for sport horses is recommended. © 2015 Blackwell Verlag GmbH.

  3. Evaluation of joint toxicity of nitroaromatic compounds and copper to Photobacterium phosphoreum and QSAR analysis.

    Science.gov (United States)

    Su, Limin; Zhang, Xujia; Yuan, Xing; Zhao, Yuanhui; Zhang, Dongmei; Qin, Weichao

    2012-11-30

    The individual toxicities of Cu and 11 nitroaromatic compounds to Photobacterium phosphoreum were determined. The toxicity was expressed as the concentrations causing a 50% inhibition of bioluminescence after 15 min exposure (IC(50)). To evaluate the joint effect between the metal ion and the 11 nitroaromatic compounds, the joint toxicity of Cu and 11 nitroaromatic compounds were measured at different Cu concentrations (0.2IC(50), 0.5IC(50) and 0.8IC(50)), respectively. The result shows that the binary joint effect between Cu and nitroaromatic compounds is mainly simple addition at the low Cu concentration (0.2IC(50)). However, an antagonism effect, 55% and 64%, was observed between Cu and 11 nitroaromatic compounds for Cu at medium and high concentrations (0.5IC(50) and 0.8IC(50)). Quantitative structure-activity relationship (QSAR) analysis was performed to study the joint toxicity for the 11 nitroaromatic compounds. The result shows that the toxicity of nitroaromatic compounds is related to descriptors of Connolly solvent-excluded volume (CSEV) and dipolarity/polarizability (S) at low Cu concentration. On the other hand, the toxicity is related to Connolly accessible area (CAA) at medium and high Cu concentrations. The result indicates that different QSAR models on complex mixtures need to be developed to assess the ecological risk in real environments. Using single toxic data to evaluate the toxic effect of mixtures may result in wrong conclusions. Copyright © 2012 Elsevier B.V. All rights reserved.

  4. Retrospective Evaluation Of MRI Findings Of Knee Joint In 255 Patients

    Directory of Open Access Journals (Sweden)

    Ahmet Mete

    2003-03-01

    Full Text Available Retrospective evaluation of knee MRI obtained from 255 cases and to demonstrate most common knee joint pathologies in our region.In our study knee joints of 255 cases who admitted to different clinics of our hospital with various complains of knee between October 1996 and December 1998 were examined in wide spectrum with MRI. Via 1.0 Tesla MRI device and special knee coil in sagittal, coronal and axial plains MRI images were obtained. The number of male and female patients were 173 and 82 and their ages were ranged between 14 and 70, and the mean age was 3413.The most common knee pathologies were intra-articular fluid (%58.04, medial (%46,66 and lateral (%12.55 meniscal injuries, anterior cruciate ligament injury (%17.25 and osteoarthritis (%14.9. The other important lesions were degeneration of medial and lateral meniscus, Baker’s cyst, bursitis, posterior cruciate ligament injury , medial and lateral collateral ligament injuries, synovial hypertrophy, chondromalasia of patella, and contusion.In our images of knee the most common lesions were injuries of meniscus and ligament. Because of being noninvasive technique for knee joint pathologies, capacity of multiplanar imaging, high contrast resolution and chance of detailed anatomic evaluation MR imaging was found to be most appropriate imaging technique for knee joint pathologies.

  5. Computed tomography evaluation of temporomandibular joint alterations in class II Division 1 subdivision patients: condylar symmetry.

    Science.gov (United States)

    Vitral, Robert Willer Farinazzo; Telles, Carlos De Souza

    2002-04-01

    Thirty persons ranging from 12 years 8 months to 42 years of age with Class II Division 1 subdivision malocclusions underwent computed tomography of the temporomandibular joints. The images obtained from axial slices were evaluated for possible asymmetries in size and position that may exist between the condylar processes associated with this malocclusion. Paired Student t tests were applied, and Pearson product moment correlations were determined after measurements on both Class I and Class II sides were obtained. The results of this study showed no statistically significant asymmetries between the condylar processes evaluated in this sample.

  6. Radiographic evaluation of cervical spine of subjects with temporomandibular joint internal disorder

    OpenAIRE

    Wagner Cesar Munhoz; Amélia Pasqual Marques; José Tadeu Tesseroli de Siqueira

    2004-01-01

    Although the etiopathophysiology of internal temporomandibular joint internal disorders (TMJ ID) is still unknown, it has been suggested that head and body posture could be related to its initial onset, development and perpetuation. The purpose of the present study was to observe the relationship between cervical spine X-ray abnormalities and TMJ ID. This investigation evaluated 30 subjects with internal TMJ disorder symptoms (test group) and 20 healthy subjects (control group). Subjects were...

  7. Evaluation of risk factors for degenerative joint disease associated with hip dysplasia in dogs.

    Science.gov (United States)

    Smith, G K; Popovitch, C A; Gregor, T P; Shofer, F S

    1995-03-01

    Passive coxofemoral joint laxity of dogs, as quantitated by a distraction-stress radiographic method, may have important prognostic value in determining susceptibility to hip dysplasia. Data from 151 dogs, representing 13 breeds, were included in a logistic regression model to evaluate the contribution of factors such as age, breed, weight, sex, distraction index, and Norberg angle to the risk of developing degenerative joint disease (DJD) of the coxofemoral joint. Of the factors studied, the amount of passive hip laxity, as quantitated by the distraction index, was the most significant (P joint. In the longitudinal and cross-sectional components of the study, distraction index was a significant (P hip laxity:DJD correlation increased with the age of dog. In contrast, the Norberg angle, a measure of hip laxity on the standard hip-extended radiograph, was not found to be a significant risk factor for DJD, either in the longitudinal or cross-sectional analyses. Breed-specific probability curves of DJD susceptibility indicated that German Shepherd Dogs had a significantly (P Dogs. The information derived from this statistical model will help to scientifically characterize the role of passive hip laxity as a component in the pathogenesis of DJD of the coxofemoral joint.

  8. Facet joint injuries in acute cervical spine trauma : evaluation with CT and MRI

    Energy Technology Data Exchange (ETDEWEB)

    Ha, Jeon Ju; Kim, Dong Hyun; Lee, Jeong Hwa; Lee, Keon; Kwon, Hyeok Po; Kwon, Jung Hyeok; Yun, Seong Mun [Dongkang General Hospital, Seoul (Korea, Republic of)

    1999-05-01

    To evaluate injury patterns of facet joints and associated soft tissue injuries in patients with acute traumatic cervical facet joint injuries. From among patients with cervical spine trauma, 27 with facet joint injuries, as seen on CT and MRI, were chosen for this study. CT scans were analyzed with regard to the location of facet joint injury, the presence or absence of facet dislocation or fracture, and other associated fractures. MR images were analyzed with regard to ligament injury, intervertebral disc injury, intervertebral disc herniation, and spinal cord injury. The most common location of facet joint injury was C6-7 level(n=10), followed by C5-6(n=8). Among these 27 patients with facet joint injuries, 12(44%) had bilateral injuries and 15(56%) unilateral injuries. Facet fractures were present in 17 cases(63%) and the fracture of inferior facet was more frequent than superior. Patterns of fracture were vertical, transverse, or comminuted, but vertical fracture was the most common. Various degrees of dislocation were observed in patients with facet fractures. Fractures other than facet included pillar(n=11), lamina(n=6), transverse process(n=14), body(n=13), and spinous process(n=3). On MR images, anterior longitudinal ligament injury was found in 8 patients(30%), posterior longitudinal ligament injury in 4(15%), and interspinous ligament injury in 20(74%). Twelve patients(44%) had spinal cord injuries including edema(n=8) and hemorrhage(n=4). Among patients with disc abnormalities, 11(41%) had intervertebral disc injuries, and traumatic disc herniations were found in nine. Traumatic cervical facet joint injuries were manifested as various patterns and frequently associated with other fractures or soft tissue injuries. Analysis of CT and MR findings of these injury patterns helped formulate a therapeutic plan and determine of prognosis.

  9. Results of total joint arthroplasty and joint preserving surgery in younger patients evaluated by alternative outcome measures

    DEFF Research Database (Denmark)

    Klit, Jakob

    2014-01-01

    BACKGROUND: Knee and hip OA is the clinical and pathological outcome of a functional and structural failure of the joint, resulting in pain and physical dysfunction. Despite the similarity in clinical presentation the pathogenesis seems to differ. Where knee OA is associated with obesity and trauma......-effects of the scores. The overall aim of this thesis was to investigate the consequences of PAO, TKA, and THA in younger patients evaluated by alternative outcomes in relation to satisfaction, fulfillment of expectations, symptoms of depression, the socioeconomic effects, and abilities in sex-life; to improve patient...... received a questionnaire concerning aspects of functional ability, patient satisfaction, expectations, and quality of life following PAO. Both Study II and Study III are prospective multicenter cohort studies. Consecutive patients less than 60 years of age scheduled for (study II) unilateral or bilateral...

  10. In vivo pilot study evaluating the thumb carpometacarpal joint during circumduction.

    Science.gov (United States)

    Goto, Akira; Leng, Shuai; Sugamoto, Kazuomi; Cooney, William P; Kakar, Sanjeev; Zhao, Kristin

    2014-04-01

    Analysis of arthrokinematics may have clinical use in the diagnosis of dynamic instability of the thumb and wrist. Recent technological advances allow noninvasive, high-resolution imaging of skeletal (thumb and carpal bones) structures during motion. The primary purpose of this study is to define the arthrokinematics, estimated joint contact patterns, and distribution ratios of the carpometacarpal joint of the thumb using four-dimensional CT (three-dimensional CT + time) and registration algorithms. The second purpose is to validate the accuracy of the approach. Four-dimensional CT scans were obtained using a nongated sequential scanning technique. Eighteen image volumes were reconstructed over a 2-second cycle during thumb circumduction in one healthy volunteer. Using a registration algorithm, serial thumb motions as well as estimated joint contact areas were quantified. To evaluate the accuracy of our approach, one cadaveric hand was used. During circumduction, the ranges of motion of the thumb carpometacarpal joint were: flexion-extension, 27.3°; adduction-abduction, 66.9°; and pronation-supination, 10°. The magnitude of the translation of the center of the estimated joint contact area of the metacarpal was 4.1, 4.0, 1.0, and 1.5 mm when moving from the initial key pinch position to adduction, adduction to palmar abduction, palmar abduction to opposition, and opposition to the initial key pinch position, respectively. The maximum estimated contact area on the trapezium and on the metacarpal was in palmar abduction; the minimum was in adduction. Dominant central-volar contact patterns were observed on both the trapezium and the metacarpal bone except in adduction. This analysis approach had an average rotational error of less than 1°. During circumduction, the estimated joint contact area was concentrated on the central-volar regions of both the trapezium and the metacarpal bones except when the thumb was adducted. This tool provides quantification of

  11. Results of total joint arthroplasty and joint preserving surgery in younger patients evaluated by alternative outcome measures.

    Science.gov (United States)

    Klit, Jakob

    2014-04-01

    Knee and hip OA is the clinical and pathological outcome of a functional and structural failure of the joint, resulting in pain and physical dysfunction. Despite the similarity in clinical presentation the pathogenesis seems to differ. Where knee OA is associated with obesity and trauma, hip OA is associated with FAI covering three fundamentally different hip deformities, including acetabular dysplasia; all hypothesized to initiates OA development. Where PAO is used worldwide as a joint-preserving procedure in acetabular dysplasia, TKA and THA are the treatment of choice of end stage OA. Traditional main outcomes are clinically objective surgeon-reported endpoints. Patient perceived outcomes are known to differ from these and PROMs are now recommended as the core set of outcomes. When evaluating the outcome in younger patients, this high demanding group can show ceiling-effects of the scores. The overall aim of this thesis was to investigate the consequences of PAO, TKA, and THA in younger patients evaluated by alternative outcomes in relation to satisfaction, fulfillment of expectations, symptoms of depression, the socioeconomic effects, and abilities in sex-life; to improve patient information prior to PAO, TKA and THA surgery. This PhD thesis is based on three studies. Study I is a cross-sectional survey of preserved hip joints with a mean follow-up of ten years after PAO. One hundred patients (121 PAO's) were eligible for inclusion. An inquiry to the National Patient registry identified 36 of PAO's (in 35 patients) being converted to THA. The 61 remaining patients (80 preserved hip joints) were asked to participate in this questionnaire based follow-up. Fifty-five patients (70 preserved hip-joints) accepted and constituted the study population. All patients received a questionnaire concerning aspects of functional ability, patient satisfaction, expectations, and quality of life following PAO. Both Study II and Study III are prospective multicenter cohort

  12. Clinical and magnetic resonance evaluation of the temporomandibular joint with rotational disc displacement

    Energy Technology Data Exchange (ETDEWEB)

    Chiba, Masatoshi; Sakurada, Motoyuki; Echigo, Seishi [Tohoku Univ., Sendai (Japan). School of Dentistry; Kumagai, Masahiro; Kochi, Shoko

    1998-03-01

    The most common direction of temporomandibular joint (TMJ) disc displacement is anterior. Anterior disc displacement is associated with lateral or medial disc displacement, termed rotational disc displacement (RDD). There have been few systematic studies of the clinical and magnetic resonance imaging (MRI) findings of TMJs with RDD. The aim of this study was to assess the prevalence of RDD and to evaluate the relations between the direction of disc displacement (anteromedial RDD, anterolateral RDD, and pure anterior disc displacement) and clinical findings, including joint pain, joint sound, and range of motion, as well as MRI findings, including disc shape, disc reduction, disc mobility, degree of disc displacement, bone changes of the condyle, and degree of condylar translation. The study was based on MRI of 529 TMJs in 409 patients with symptoms and signs of TMJ. Sagittal and coronal T1-weighted SE images (1.5 Tesla) were used. MRI showed anteromedial RDD in 96 joints (18.1%), anterolateral RDD in 64 joints (12.1%), and anterior disc displacement in 207 joints (39.1%). There were no statistical differences between anterolateral RDD, anteromedial RDD, and anterior disc displacement with regard to clinical findings. The incidence of reducible disc was higher in anterolateral RDD than in anteromedial RDD or anterior disc displacement. The incidence of bone changes was lower in anterolateral RDD than in anterior disc displacement. There were no significant differences between anteromedial RDD and anterior disc displacement with regard to MRI findings. In conclusion, anteromedial RDD may represent the same clinical entity as anterior disc displacement, but it remains unclear whether or not anterolateral RDD differs from anteromedial RDD or anterior disc displacement. (author)

  13. Subject-specific musculoskeletal modeling in the evaluation of shoulder muscle and joint function.

    Science.gov (United States)

    Wu, Wen; Lee, Peter V S; Bryant, Adam L; Galea, Mary; Ackland, David C

    2016-11-07

    Upper limb muscle force estimation using Hill-type muscle models depends on musculotendon parameter values, which cannot be readily measured non-invasively. Generic and scaled-generic parameters may be quickly and easily employed, but these approaches do not account for an individual subject's joint torque capacity. The objective of the present study was to develop a subject-specific experimental testing and modeling framework to evaluate shoulder muscle and joint function during activities of daily living, and to assess the capacity of generic and scaled-generic musculotendon parameters to predict muscle and joint function. Three-dimensional musculoskeletal models of the shoulders of 6 healthy subjects were developed to calculate muscle and glenohumeral joint loading during abduction, flexion, horizontal flexion, nose touching and reaching using subject-specific, scaled-generic and generic musculotendon parameters. Muscle and glenohumeral joint forces calculated using generic and scaled-generic models were significantly different to those of subject-specific models (pMuscles in generic musculoskeletal models operated further from the plateau of their force-length curves than those of scaled-generic and subject-specific models, while muscles in subject-specific models operated over a wider region of their force length curves than those of the generic or scaled-generic models, reflecting diversity of subject shoulder strength. The findings of this study suggest that generic and scaled-generic musculotendon parameters may not provide sufficient accuracy in prediction of shoulder muscle and joint loading when compared to models that employ subject-specific parameter-estimation approaches. Copyright © 2016 Elsevier Ltd. All rights reserved.

  14. Design, construction, and evaluation of "sensor lock": an electromechanical stance control knee joint.

    Science.gov (United States)

    Arazpour, Mokhtar; Ahmadi Bani, Monireh; Baniasad, Mina; Samadian, Mohammad; Golchin, Navid

    2017-03-28

    Most currently-available stance control knee ankle foot orthoses (SCKAFOs) still need full knee extension to lock the knee joint, and they are still noisy, bulky, and heavy. Therefore, the aim of this study was to design, construct, and evaluate an original electromechanical SCKAFO knee joint that could feasibly solve these problems, and thus address the problems of current stance control knee joints with regards to their structure, function, cosmesis, and cost. Ten able-bodied (AB) participants and two (knee ankle foot orthosis) KAFO users were recruited to participate in the study. A custom SCKAFO with the same set of components was constructed for each participant. Lower limb kinematics were captured using a 6-camera, video-based motion analysis system. For AB participants, significant differences were found between normal walking and walking with the SCKAFO for temporal-spatial parameters and between orthoses with two modes of knee joints in the healthy subjects. Walking with stance control mode produced greater walking speed and step length, greater knee flexion during swing, and less pelvic obliquity than walking with a locked knee, for both AB and KAFO users. The feasibility of this new knee joint with AB people was demonstrated. Implications for rehabilitation Stance control knee ankle foot orthoses (SCKAFOs) are designed to stop knee flexion in stance phase and provide free knee movement during swing phase of walking. Due to their high cost, size, excessive weight, and poor performance, few SCKAFO were optimal clinically and commercially. The feasibility of the new knee joint with able-bodied people and poliomyelitis subjects was demonstrated.

  15. Does evaluation of the ligamentous compartment enhance diagnostic utility of sacroiliac joint MRI in axial spondyloarthritis?

    DEFF Research Database (Denmark)

    Weber, Ulrich; Maksymowych, Walter P; Chan, Stanley M

    2015-01-01

    INTRODUCTION: Inflammation of the sacroiliac joints (SIJ) is a fundamental clinical feature of axial spondyloarthritis (SpA). The anatomy of the irregularly shaped SIJ is complex with an antero-inferior cartilaginous compartment containing central hyaline and peripheral fibrocartilage, and a dorso...... in the ligamentous compartment and their potential diagnostic utility in axial SpA. We therefore aimed to evaluate the ligamentous compartment on sacroiliac joint MRI for lesion distribution and potential incremental value towards diagnosis of SpA over and above the traditional assessment of the cartilaginous...... compartment alone. METHODS: Two independent cohorts of 69 and 88 consecutive back pain patients ≤50 years were referred for suspected SpA (cohort A) or acute anterior uveitis plus back pain (cohort B). Patients were classified according to rheumatologist expert opinion based on clinical, radiographic...

  16. Success factors for international HTA projects: evaluating EUnetHTA Joint Action as an exemplar.

    Science.gov (United States)

    Guegan, Eleanor Woodford; Cook, Andrew

    2014-11-01

    Evaluation is essential for the management of international projects or networks in health technology assessment (HTA). It extends beyond the normal process of project management by incorporating qualitative dimensions and provides information about a project's effectiveness and achievements. This article aimed to identify the factors that are important for the success of international HTA projects. The European network for Health Technology Assessment Joint Action (EUnetHTA JA) is presented as an exemplar. METHODS for the evaluation of international HTA projects include interviews, focus groups, questionnaires, observations and documentary review, and the key points of these approaches have been summarized. The impact and effectiveness of the EUnetHTA JA was evaluated by questionnaires of project participants and external stakeholders, and by documentary review. The response rate for the three annual questionnaires sent to project participants ranged from 86 percent to 88 percent and for external stakeholders ranged from 65 percent to 88 percent. Key factors for project success included production of deliverables according to the workplan, achievement of objectives, added value generated, effective communication, involvement of external stakeholders, workstream management and progress from the preceding EUnetHTA 2006-2008 project. The experience of this project can inform the evaluation of future international HTA collaborations, such as the EUnetHTA 2nd Joint Action and HTAsiaLink. A high response rate was achieved to the self-completion questionnaires and the strategy followed is recommended for evaluation of international HTA projects. Future assessments of international HTA projects should strive to measure outcomes and impact, not just outputs and process.

  17. Comparison of Plain MRI and MR Arthrography in the Evaluation of Lateral Ligamentous Injury of the Ankle Joint

    Directory of Open Access Journals (Sweden)

    Mei-Chun Chou

    2006-01-01

    Conclusion: For evaluating ankle disability, using plain MRI alone is not adequate for correctly detecting lateral collateral ligamentous injury of the ankle joint. MR arthrography improves the sensitivity and the accuracy for ATaF and CF ligament injuries. It also helps in assessing coexisting pathologic lesions of ankle joints, especially impingement syndromes and osteochondral lesions, and provides more information for therapeutic decision making.

  18. Joint evaluation of fracture azimuth by electromagnetic wave and elastic wave

    Science.gov (United States)

    Feng, Xuan; Liu, Cai; Wang, Qiao; Wang, Kai; Lu, Qi; Xue, Jian; Liang, Wenjing; Yu, Yue; Ren, Qianci

    2013-12-01

    With the multi-wave, multi-component seismic wave exploration, one can apply the anisotropy of fracture media to analyze the attributes of the fracture media, including the fracture azimuth. In the meantime, the techniques of full-polarimetric electromagnetic wave, including full-polarimetric borehole radar, can also be used to analyze the attributes of the fracture. However, the analysis precision of both the multi-component elastic wave exploration and full-polarimetric electromagnetic wave exploration is prone to the influence of noise and other factors. So far, some researchers have conducted studies on the joint inversion of electromagnetic waves and seismic waves. This paper develops evaluation techniques of fracture azimuth by electromagnetic wave, elastic wave, and joint analysis of coincident elastic reflection and electromagnetic data. Firstly, based on the shear wave splitting of elastic waves, this paper develops a statistical analysis technique which applies Pearson correlation coefficient to count and analyze the azimuth angle of fracture. Secondly, based on the information of electromagnetic polarization rotated by fracture, this paper develops a statistical analysis method of full-polarimetric electromagnetic waves which applies the maximum amplitude ratio between the co-polarization and cross-polarization to analyze the azimuth angle of fracture. Furthermore, based on the analysis result of the elastic wave and full-polarimetric electromagnetic wave, this paper develops a joint analysis technique which adopts the standard deviation. At last, authors in this study conduct joint detection experiments on the coincident fracture medium by using the ultrasonic and full-polarimetric ground penetrating radar. The experimental result indicates that both single geophysical methods are capable of analyzing the fracture azimuth angle, but the joint analysis is more accurate.

  19. Evaluation of ejection safety for the joint helmet-mounted cueing system

    Science.gov (United States)

    Barnaba, James M.; Kirk, William K.

    1999-07-01

    Aircrew safety is paramount in the design of a helmet-mounted display (HMD). For the tactical aircrew, ensuring a successful ejection presents significant design challenges. The Joint Helmet Mounted Cueing System (JHMCS) Integrated Product Team (IPT) has been evaluating Vision Systems International's HMD design for aircrew protection in this environment. The JHMCS IPT has developed a set of test objectives in concert with acquisition reform to demonstrate ejection compatibility of the JHMCS. This testing series will be discussed, and will include windblast, ejection tower, and sled and in-flight ejection testing, findings and design impacts. JHMCS performance parameters evaluated include structural integrity, facial and head protection, neck tensile loads, ejection seat and crew equipment compatibility, and mechanical functionality. The design environment for the JHMCS currently is both small and large, male and female aircrew withstanding a successful 450-knot ejection in any of four current USAF & USN tactical aircraft platforms.

  20. MRI EVALUATION OF PAINFUL KNEE JOINT- THE CORRELATION OF MULTIPLE COEXISTING PATHOLOGIES, AGE AND SEX

    Directory of Open Access Journals (Sweden)

    Mukheswar Pame

    2017-03-01

    Full Text Available BACKGROUND 1. To evaluate the incidence and coexistence of multiple knee joint pathologies causing painful knee and their correlation to age and sex. 2. To evaluate the Magnetic Resonance Imaging (MRI features in various knee pathologies and to identify the common lesions. MATERIALS AND METHODS A retrospective study was performed using the clinical data of patients presenting with painful knee joint which were evaluated with MRI. Data from 200 patients examined between September 2015 and August 2016 were included into this study. The data was analysed statistically to evaluate the correlation between the MR pathological findings to age and sex of the patients. RESULTS The patient’s age ranged between 8 and 75 years (mean: 36 years. Anterior cruciate ligament (ACL tear was the commonest finding (60% followed by bursitis (55%, meniscal degeneration (54.6% and meniscal tear (52%. Primary signs of ACL tear were hyperintensity, discontinuity and nonvisualisation. Secondary signs like Posterior cruciate ligament (PCL buckling, PCL index of greater than 0.5, uncovered Lateral meniscus (LM and bone contusion assisted in diagnosis in indeterminate cases. Mid substance was the commonest site of ACL tear (64%. PCL tear accounted for only a small percentage (7%. Medial Meniscus (MM tear (35% was commoner than LM tear (17%. The posterior horn of meniscus was the commonest site of injury (86.5%. Age was significantly correlated with meniscal degeneration and tear, Medial collateral ligament (MCL degeneration, parameniscal cyst, and chondromalacia patellae. A significant correlation between male gender and ACL injury was noted. Meniscal injury was significantly correlated with bursitis, as well with MCL injury. Bone bruise was significantly correlated with ACL injury, MCL injury and Lateral collateral ligament (LCL injury. CONCLUSIONS MRI findings of certain pathologies in a painful knee can coexist and significantly correlate with each other, age and sex of

  1. Long-term creep testing and microstructure evaluation of P91 steel weld joints

    Energy Technology Data Exchange (ETDEWEB)

    Jandova, D.; Kasl, J.; Kanta, V. [SKODA VYZKUM s.r.o., Plzen (Czech Republic)

    2007-06-15

    Trial weld joints were made from wrought and cast modified 9Cr-lMo-V steel using GTAW and SMAW methods. Creep testing was carried out at temperature range from 525 deg C to 625 deg C and stresses from 50 to 240 MPa. Time to rupture of welds made from tube segments and cast plates reached almost 30 000 hours and 20 000 hours respectively. Creep strength was evaluated according the Larson-Miller parametric equation and microstructure was investigated using both light and electron microscopy. Creep rupture strength of both weld joints tested at temperatures below 600 deg C falls into the {+-}20% scatter band of the creep rupture strength of the parent material. At 600 deg C and 625 deg C the creep strength dropped by 27% and 30% for the plate weld and the tube weld respectively. All ruptures occurred in fine grain and intercritically reheated heat affected zones either in the parent material or in the weld metal. Observation of thin foils prepared from selected regions of the weld joints revealed differences in precipitation processes and the structure recovery causing decrease of dislocation density in some regions. Fine ferritic grains with low density of fine carbonitride precipitate occurred in critical localities. Soft grains were deformed and cavities at grain boundaries initiated the crack propagation. (orig.)

  2. Evaluation of Corrosion Performance of Titanium/Steel Joint Brazed by Cu-Based Filler Metal

    Science.gov (United States)

    Elrefaey, A.; Wojarski, L.; Tillmann, W.

    2012-05-01

    Furnace vacuum brazing has been employed to join commercially pure titanium and low carbon steel using copper-based filler metal with the composition of Cu-10.6Mn-1.9Ni, at.%. Three different brazing temperatures 930, 970, and 1000 °C and a holding time of 15 min were studied and evaluated. The corrosion behavior of the joint in 0.1 M sulfuric acid was investigated using immersion and electrochemical tests. Measurements of corrosion potential, corrosion current density, corrosion rate, polarization resistance, weight loss, and morphology of corrosion attack were used in this study. Experimental results showed that severe corrosion attack of the steel side at the interfacial area is clearly observed. Despite the difference in corrosion rate values obtained by electrochemical and weight loss measurements, the trend of results was identical to a large extent. Corrosion resistance of the joint showed a general tendency to increase with rising brazing temperature. The lowest corrosion rate was obtained for the couple bonded at 1000 °C. Meanwhile, at the lowest joining temperature of 930 °C, corrosion rate showed a higher value. The results of joints corrosion resistance were attributed to the difference in microstructure features and chemical analysis.

  3. Evaluation of the marsh deer stifle joint by imaging studies and gross anatomy.

    Science.gov (United States)

    Shigue, D A; Rahal, S C; Schimming, B C; Santos, R R; Vulcano, L C; Linardi, J L; Teixeira, C R

    2015-12-01

    This study aimed to evaluate the stifle joint of marsh deer using imaging studies and in comparison with gross anatomy. Ten hindlimbs from 5 marsh deer (Blastocerus dichotomus) were used. Radiography, computed tomography (CT) and magnetic resonance imaging (MRI) were performed in each stifle joint. Two hindlimbs were dissected to describe stifle gross anatomy. The other limbs were sectioned in sagittal, dorsal or transverse planes. In the craniocaudal radiographic view, the lateral femoral condyle was broader than the medial femoral condyle. The femoral trochlea was asymmetrical. Subsequent multiplanar reconstruction revealed in the cranial view that the external surface of the patella was roughened, the medial trochlea ridge was larger than the lateral one, and the extensor fossa at the lateral condyle was next to the lateral ridge. The popliteal fossa was better visualized via the lateral view. Sagittal MRI images identified lateral and medial menisci, caudolateral and craniomedial bundles of cranial cruciate ligament, caudal cruciate ligament, patellar ligament and common extensor tendon. In conclusion, the marsh deer stifle presents some anatomical characteristics of the ovine stifle joint. © 2014 Blackwell Verlag GmbH.

  4. Creep-fatigue evaluation method for weld joint of Mod.9Cr-1Mo steel Part II: Plate bending test and proposal of a simplified evaluation method

    Energy Technology Data Exchange (ETDEWEB)

    Ando, Masanori, E-mail: ando.masanori@jaea.go.jp; Takaya, Shigeru, E-mail: takaya.shigeru@jaea.go.jp

    2016-12-15

    Highlights: • Creep-fatigue evaluation method for weld joint of Mod.9Cr-1Mo steel is proposed. • A simplified evaluation method is also proposed for the codification. • Both proposed evaluation method was validated by the plate bending test. • For codification, the local stress and strain behavior was analyzed. - Abstract: In the present study, to develop an evaluation procedure and design rules for Mod.9Cr-1Mo steel weld joints, a method for evaluating the creep-fatigue life of Mod.9Cr-1Mo steel weld joints was proposed based on finite element analysis (FEA) and a series of cyclic plate bending tests of longitudinal and horizontal seamed plates. The strain concentration and redistribution behaviors were evaluated and the failure cycles were estimated using FEA by considering the test conditions and metallurgical discontinuities in the weld joints. Inelastic FEA models consisting of the base metal, heat-affected zone and weld metal were employed to estimate the elastic follow-up behavior caused by the metallurgical discontinuities. The elastic follow-up factors determined by comparing the elastic and inelastic FEA results were determined to be less than 1.5. Based on the estimated elastic follow-up factors obtained via inelastic FEA, a simplified technique using elastic FEA was proposed for evaluating the creep-fatigue life in Mod.9Cr-1Mo steel weld joints. The creep-fatigue life obtained using the plate bending test was compared to those estimated from the results of inelastic FEA and by a simplified evaluation method.

  5. Evaluation of creep damage in a welded joint of modified 9Cr-1Mo steel

    Science.gov (United States)

    Li, Yongkui; Monma, Yoshio; Hongo, Hiromichi; Tabuchi, Masaaki

    2010-10-01

    This paper aims to evaluate the creep damage of modified 9Cr-1Mo steel under 600 °C operating conditions, using constitutive equations based on the continuum damage mechanics. The accumulation of voids over a long period is believed to contribute to the formation of Type IV cracking, which in turn leads eventually to the failure of weldment under conditions of higher temperatures and lower stresses. Specimens of base metal, a simulated fine-grained heat affected zone, and a thin (thick) welded joint were kept under stress from 80 to 160 MPa at 600 °C. During the creep tests of thick plate welded joint specimens, the application of stress was suspended several times, and the creep damage as indicated by the void distribution was examined quantitatively using a laser microscope. The combined effect of the equivalent creep strain and the stress triaxial factor was considered and introduced into the constitutive equations with the aid of a finite element method. The logarithms of m and 1/λ in the continuum damage mechanics equations were determined to have a linear correlation with the ratio of the applied stress to the yield stress for homogeneous materials. In this way, the damage distribution and evolution in the fine-grained heat affected zone were evaluated successfully.

  6. Analysis and design of rolling-contact joints for evaluating bone plate performance.

    Science.gov (United States)

    Slocum, Alexander H; Cervantes, Thomas M; Seldin, Edward B; Varanasi, Kripa K

    2012-09-01

    An apparatus for testing maxillofacial bone plates has been designed using a rolling contact joint. First, a free-body representation of the fracture fixation techniques utilizing bone plates is used to illustrate how rolling contact joints accurately simulate in vivo biomechanics. Next, a deterministic description of machine functional requirements is given, and is then used to drive the subsequent selection and design of machine elements. Hertz contact stress and fatigue analysis for two elements are used to ensure that the machine will both withstand loads required to deform different plates, and maintain a high cycle lifetime for testing large numbers of plates. Additionally, clinically relevant deformations are presented to illustrate how stiffness is affected after a deformation is applied, and to highlight improvements made by the machine over current testing standards, which do not adequately re-create in vivo loading conditions. The machine performed as expected and allowed for analysis of bone plates in both deformed and un-deformed configurations to be conducted. Data for deformation experiments is presented to show that the rolling-contact testing machine leads to improved loading configurations, and thus a more accurate description of plate performance. A machine for evaluation of maxillofacial bone plates has been designed, manufactured, and used to accurately simulate in vivo loading conditions to more effectively evaluate the performance of both new and existing bone plates. Copyright © 2012 IPEM. Published by Elsevier Ltd. All rights reserved.

  7. Evidence-based nursing leadership: Evaluation of a Joint Academic-Service Journal Club.

    Science.gov (United States)

    Duffy, Joanne R; Thompson, Diane; Hobbs, Terry; Niemeyer-Hackett, Nancy Lee; Elpers, Susan

    2011-10-01

    This article describes the importance of evidence-based nursing leadership in the development and evaluation of a joint academic-service nursing leadership journal club. The use of scientific evidence and the embracing of an environment of continuous learning are essential to quality practice; however, nursing leadership has been slow to apply evidence-based practice to their own work. A noontime monthly meeting schedule, incentivized by lunch, was organized as a nursing leadership journal club. Articles were selected and reviewed monthly, and the process was formally evaluated using a written evaluation at the end of year 1. Eighteen articles were appraised by the group with 6 topics identified. Positive results included increased knowledge, competence of the leader, and attainment of goals. Recommendations include revision of goals, plans to share leadership of the group, development of a rigorous evaluation of outcomes, and dissemination of findings. The journal club was valuable in increasing awareness of nursing leadership research, promoting leadership development, and improving competence in the performance of research appraisals. Process improvement and further study are needed to increase understanding regarding the benefits of leadership journal clubs.

  8. The joint use of LCA and emergy evaluation for the analysis of two Italian wine farms.

    Science.gov (United States)

    Pizzigallo, A C I; Granai, C; Borsa, S

    2008-01-01

    The aim of this paper is to evaluate two agroindustrial productive processes in their entirety (one organic and one semi-industrial), focusing on the comparison of impacts derived from the inputs and outputs of the system (life cycle assessment, LCA), integrated with a physical evaluation of the resources and natural services, on a common basis (emergy). Methods based on the joint use of LCA and emergy evaluation are useful, as they measure the contribution of environmental services and products to the productive process thus focusing primarily on the environmental impact of emissions and non-renewable energy inputs. The complementarity of the methods used in this paper contributes important elements and information useful for the comprehension of the organization of agriculture within Siena's territory. The results show important elements and useful information: (1) for the comprehension of the two agroecosystems' organization; (2) for the use of the energy flows that determine their development. Moreover, the combined use of emergy and LCA gives a comparative thermodynamic performance evaluation between organic and semi-industrial farming.

  9. The neural time course of evaluating self-initiated joint attention bids.

    Science.gov (United States)

    Caruana, Nathan; de Lissa, Peter; McArthur, Genevieve

    2015-08-01

    During interactions with other people, we constantly evaluate the significance of our social partner's gaze shifts in order to coordinate our behaviour with their perspective. In this study, we used event-related potentials (ERPs) to investigate the neural time course of evaluating gaze shifts that signal the success of self-initiated joint attention bids. Nineteen participants were allocated to a "social" condition, in which they played a cooperative game with an anthropomorphic virtual character whom they believed was controlled by a human partner in a nearby laboratory. Participants were required to initiate joint attention towards a target. In response, the virtual partner shifted his gaze congruently towards the target-thus achieving joint attention--or incongruently towards a different location. Another 19 participants completed the same task in a non-social "control" condition, in which arrows, believed to be controlled by a computer program, pointed at a location that was either congruent or incongruent with the participant's target fixation. In the social condition, ERPs to the virtual partner's incongruent gaze shifts evoked significantly larger P350 and P500 peaks compared to congruent gaze shifts. This P350 and P500 morphology was absent in both the congruent and incongruent control conditions. These findings are consistent with previous claims that gaze shifts differing in their social significance modulate central-parietal ERPs 350 ms following the onset of the gaze shift. Our control data highlights the social specificity of the observed P350 effect, ruling out explanations pertaining to attention modulation or error detection. Copyright © 2015 Elsevier Inc. All rights reserved.

  10. Evaluation on joint toxicity of chlorinated anilines and cadmium to Photobacterium phosphoreum and QSAR analysis

    Energy Technology Data Exchange (ETDEWEB)

    Jin, Hao, E-mail: realking163@163.com [School of Life and Chemistry, Jiangsu Second Normal University, Nanjing, Jiangsu 210013 (China); Wang, Chao; Shi, Jiaqi [State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu 210023 (China); Chen, Lei [School of Life and Chemistry, Jiangsu Second Normal University, Nanjing, Jiangsu 210013 (China)

    2014-08-30

    Highlights: • Cd has different effects on joint toxicity when in different concentrations. • The toxicity of most binary mixtures decreases when Cd concentration rises. • Different QSAR models are developed to predict the joint toxicity. • Descriptors in QSARs can help to elucidate the joint toxicity mechanism. • Van der Waals’ force or complexation may reduce the toxicity of mixtures. - Abstract: The individual IC{sub 50} (the concentrations causing a 50% inhibition of bioluminescence after 15 min exposure) of cadmium ion (Cd) and nine chlorinated anilines to Photobacterium phosphoreum (P. phosphoreum) were determined. In order to evaluate the combined effects of the nine chlorinated anilines and Cd, the toxicities of chlorinated anilines combined with different concentrations of Cd were determined, respectively. The results showed that the number of chlorinated anilines manifesting synergy with Cd decreased with the increasing Cd concentration, and the number manifesting antagonism decreased firstly and then increased. The joint toxicity of mixtures at low Cd concentration was weaker than that of most binary mixtures when combined with Cd at medium and high concentrations as indicated by TU{sub Total}. QSAR analysis showed that the single toxicity of chlorinated anilines was related to the energy of the lowest unoccupied molecular orbital (E{sub LUMO}). When combined with different concentrations of Cd, the toxicity was related to the energy difference (E{sub HOMO} − E{sub LUMO}) with different coefficients. Van der Waals’ force or the complexation between chlorinated anilines and Cd had an impact on the toxicity of combined systems, which could account for QSAR models with different physico-chemical descriptors.

  11. Developing a multi-joint upper limb exoskeleton robot for diagnosis, therapy, and outcome evaluation in neurorehabilitation.

    Science.gov (United States)

    Ren, Yupeng; Kang, Sang Hoon; Park, Hyung-Soon; Wu, Yi-Ning; Zhang, Li-Qun

    2013-05-01

    Arm impairments in patients post stroke involve the shoulder, elbow and wrist simultaneously. It is not very clear how patients develop spasticity and reduced range of motion (ROM) at the multiple joints and the abnormal couplings among the multiple joints and the multiple degrees-of-freedom (DOF) during passive movement. It is also not clear how they lose independent control of individual joints/DOFs and coordination among the joints/DOFs during voluntary movement. An upper limb exoskeleton robot, the IntelliArm, which can control the shoulder, elbow, and wrist, was developed, aiming to support clinicians and patients with the following integrated capabilities: 1) quantitative, objective, and comprehensive multi-joint neuromechanical pre-evaluation capabilities aiding multi-joint/DOF diagnosis for individual patients; 2) strenuous and safe passive stretching of hypertonic/deformed arm for loosening up muscles/joints based on the robot-aided diagnosis; 3) (assistive/resistive) active reaching training after passive stretching for regaining/improving motor control ability; and 4) quantitative, objective, and comprehensive neuromechanical outcome evaluation at the level of individual joints/DOFs, multiple joints, and whole arm. Feasibility of the integrated capabilities was demonstrated through experiments with stroke survivors and healthy subjects.

  12. Experimental Design for Evaluation of Co-extruded Refractory Metal/Nickel Base Superalloy Joints

    Energy Technology Data Exchange (ETDEWEB)

    ME Petrichek

    2005-12-16

    a critical thickness (0.0005 in.). A diffusion barrier that exceeded this thickness would likely fail. The joint fabrication method must therefore mechanically bond the two materials causing little or no interdiffusion upon formation. Co-extrusion fits this description since it forms a mechanical joint between two materials by using heat and pressure. The two materials to be extruded are first assembled and sealed within a co-extrusion billet which is subsequently heated and then extruded through a die. For a production application, once the joint is formed, it is dejacketed to remove the outer canister. The remaining piece consists of two materials bonded together with a thin diffusion barrier. Therefore, the long-term stability of the joint is determined primarily by the kinetics of interdiffusion reaction between the two materials. An experimental design for co-extrusion of refractory metals and nickel-based superalloys was developed to evaluate this joining process and determine the long-term stability of the joints.

  13. Evaluating joint destruction in rheumatoid arthritis: is it necessary to radiograph both hands and feet?

    Science.gov (United States)

    Knevel, R; Kwok, K Y; de Rooy, D P C; Posthumus, M D; Huizinga, T W J; Brouwer, E; van der Helm-van Mil, A H M

    2013-03-01

    Radiological damage is an important outcome measure in rheumatoid arthritis (RA), both for research and clinical purposes. Depending on the setting, both hands and feet are radiographed, or only a part of these. It is unknown whether radiographing part of the four extremities gives comparable information to radiographing both hands and feet. This study therefore aimed to compare the radiological information obtained both when evaluating single time point radiographs and progression over time, in early and advanced RA. 6261 sets of hands and feet x-rays of 2193 RA patients from Leiden, Groningen (both from The Netherlands) and North America were studied. Correlations between joint damage at different regions were compared (unilateral vs bilateral and hands vs feet). Analyses were done at single time points (cross-sectional) and for progression over time (longitudinal), both for continuous severity measures (Sharp/van der Heijde score; SHS) and binomial measures of erosiveness. When studying single time points, the severity of joint damage (SHS) is highly correlated between left and right, but weakly correlated between hands and feet. Correlation coefficients were higher in advanced than early RA. These findings were comparable in the three datasets. When evaluating erosiveness using only unilateral x-rays or hands without feet, 19.3% and 24.0-40.4% are incorrectly classified as non-erosiveness. Similarly, when evaluating disease progression by imaging only unilateral x-rays or only hand x-rays, progression would have been missed in 11.6-16.2% and 21.2-31.0% of patients. Performing x-rays of both hands and feet yields additive information compared with imaging only a part of these.

  14. Magnetic Resonance Imaging (MRI) Evaluation for Anterior Disc Displacement of the Temporomandibular Joint.

    Science.gov (United States)

    Yang, Zhongjun; Wang, Mingguo; Ma, Yingwei; Lai, Qingguo; Tong, Dongdong; Zhang, Fenghe; Dong, Lili

    2017-02-08

    BACKGROUND Magnetic resonance imaging (MRI) is the criterion standard imaging technique for visualization of the temporomandibular joint (TMJ) region, and is currently considered the optimum modality for comprehensive evaluation in patients with temporomandibular joint disorder (TMD). This study was aimed at finding the value of MRI in pre-clinical diagnosis of TMJ disc displacement. MATERIAL AND METHODS Patients primarily diagnosed as having anterior disc displacement by clinical symptoms and X-ray were selected in the present study. MRI was used to evaluate surrounding anatomical structures and position, as well as morphological and signal intensity change between patients and normal controls. RESULTS Posterior band position was significantly different between the patient group and control group. At the maximum opened-mouth position, the location of disc intermediate zone returned to normal. At closed-mouth position, the thickness of anterior and middle, but not posterior, band increased. The motion range of the condyle in the anterior disc displacement without reduction (ADDWR) patient group was significantly less than the value in the anterior disc displacement with reduction (ADDR) patient group and the control group. Whether at closed-mouth position or maximum opened-mouth position, the exudate volume in the patient group was greater than in the normal group. CONCLUSIONS MRI can be successfully used to evaluate multiple morphological changes at different mouth positions of normal volunteers and patients. The disc-condyle relationship can serve as an important indicator in assessing anterior disc displacement, and can be used to distinguish disc displacement with or without reduction.

  15. The challenges of joint working: lessons from the Supporting People Health Pilot evaluation

    Directory of Open Access Journals (Sweden)

    Ailsa Cameron

    2007-10-01

    Full Text Available Purpose: This paper reports the findings of the evaluation of the Supporting People Health Pilots programme which was established to demonstrate the policy links between housing support services and health and social care services by encouraging the development of integrated services. The paper highlights the challenges of working across housing, health and social care boundaries. Method: The evaluation of the 6 health pilots rested on two main sources of data collection: Quarterly Project Evaluation Reports collected process data as well as reporting progress against aims and objectives. Semi-structured interviews - conducted across all key professional stakeholder groups and agencies and with people who used services - explored their experiences of these new services. Results: The ability of pilots to work across organisational boundaries to achieve their aims and objectives was associated not only with agencies sharing an understanding of the purpose of the joint venture, a history of joint working and clear and efficient governance arrangements but on two other characteristics: the extent and nature of statutory sector participation and, whether or not the service is defined by a history of voluntary sector involvement. In particular the pilots demonstrated how voluntary sector agencies appeared to be less constrained by organisational priorities and professional agenda and more able to respond flexibly to meet the complex needs of individuals. Conclusion and discussion: The pilots demonstrate that integrating services to support people with complex needs works best when the service is determined by the characteristics of those who use the service rather than pre-existing organisational structures.

  16. Numerical evaluation of multipass welding temperature field in API 5L X80 steel welded joints

    Directory of Open Access Journals (Sweden)

    J Nóbrega

    2016-10-01

    Full Text Available Many are the metallurgical changes suffered by materials when subjected to welding thermal cycle, promoting a considerable influence on the welded structures thermo mechanical properties. In project phase, one alternative for evaluating the welding cycle variable, would be the employment of computational methods through simulation. So, this paper presents an evaluation of the temperature field in a multipass welding of API 5L X80 steel used for oil and gas transportation, using the ABAQUS ® software, based on Finite Elements Method (FEM. During the simulation complex phenomena are considerable including: Variation in physical and mechanical properties of materials as a function of temperature, welding speed and the different mechanisms of heat exchange with the environment (convection and radiation were used. These considerations allow a more robust mathematical modeling for the welding process. An analytical heat source proposed by Goldak, to model the heat input in order to characterize the multipass welding through the GTAW (Gas Tungsten Arc Welding process on root and the SMAW (Shielded Metal Arc Welding process for the filling passes were used. So, it was possible to evaluate the effect of each welding pass on the welded joint temperature field, through the temperature peaks and cooling rates values during the welding process.

  17. A Diagram for Evaluating Delamination of GFRP/Stainless-steel Adhesive Joints by Using Stress Singularity Parameters

    Science.gov (United States)

    Iwasa, Masaaki

    Static tests on double-lap and T-type adhesive joints were performed. We developed a device that applies contact pressure to glass-fiber reinforced plastics/stainless-steel double-lap adhesive joints. The device contains a bolt with which a strain gauge is bonded for controlling contact pressure. Using this device, we investigated the effect of contact pressure on the delamination strength of double-lap adhesive joints. We applied tensile shear loading to double-lap adhesive joints under contact pressure to their adhesive interfaces. We found that the delamination strength of the double-lap adhesive joints increased with increasing contact pressure. On the contrary, when we applied compressive shear stress to them, the delamination strength stayed constant. Therefore the delamination strength of double-lap adhesive joints is dominated by normal stress when contact pressure under tensile shear loading is applied. On the other hand, it was dominated by shear stress when contact pressure under compressive shear loading was applied. Then stress singularity parameters for double-lap and T-type adhesive joints were performed by the FEM. Stress distributions near the bonding edge could be expressed by the stress singularity parameters. Finally, a delamination evaluation diagram using stress singularity parameters was developed. This diagram enables us to evaluate the delamination strength of adhesive joints.

  18. Cooperative joint precoding in a downlink cellular system with shared relay: Design and performance evaluation

    KAUST Repository

    Kwon, JaeWoo

    2012-10-01

    In this paper, we investigate a relay enhanced cellular system, where a relay station is located in the overlap area served by two base stations. We propose cooperative joint precoding schemes for the downlink transmission of such relay enhanced cellular system to maximize the system capacity while minimizing the interference at both the relay station and the mobile stations. We formulate the optimization problems to maximize the system capacity and design the multiuser precoding vectors at each base station and the relay station. We quantify the ergodic rate performance of the proposed multiuser precoding schemes through statistical analysis. The extensively derived ergodic expressions will facilitate the accurate performance evaluation of the proposed transmission schemes. Numerical results show that the proposed schemes can effectively cancel the interference and improve the sum rate and the outage performance for cell edge users. © 2002-2012 IEEE.

  19. Evaluation of occlusal splint therapy in temporomandibular joint disorder patients using real-time ultrasonography.

    Science.gov (United States)

    Telkar, Swaroop; Khan, Mubeen K; Shukla, Anil Kumar; Dodamani, Arun; Yalsangi, Shilpa; Telkar, Deepti

    2010-11-01

    The aim of the present study was to evaluate the effect of occlusal splint therapy by determining the cross-sectional dimension of masseter muscle using ultrasound in patients with temporomandibular joint disc displacement with reduction. Twenty-seven patients aged between 20 and 40 years were included in the study. A detailed history was obtained, and a comprehensive clinical examination was carried out. Subjective assessment with structured pro forma was performed pre-occlusal and post-occlusal splint therapy. The objective measurement of the bilateral masseter muscle thickness was recorded using real-time ultrasonography before and after splint therapy. The mean ultrasound thickness of the masseter muscle in the pre-clenching state before splint therapy was 9.45 mm (SD 1.39), and the post-clenching state was 13.15 mm (SD 2.23). After splint therapy, the mean thickness in the pre-clenching state was 9.14 mm (SD 1.31), and the post-clenching state was 12.78 mm (SD 2.23; P<0.001). Ultrasonographic measurements of the masseter muscle in patients with temporomandibular joint disc displacement with reduction can be a useful tool to assess the effectiveness of occlusal splint therapy. Such conservative measures can significantly reduce masticatory muscle tenderness, especially of the temporalis and masseter. © 2010 Blackwell Publishing Asia Pty Ltd.

  20. Evaluation of debonding strength of single lap joint by the intensity of singular stress field

    Science.gov (United States)

    Miyazaki, Tatsujiro; Noda, Nao-Aki

    2017-05-01

    In this paper, the similarity of the singular stress field of the single lap joint (SLJ) is discussed to evaluate the debonding fracture by the intensity of the singular stress field (ISSF). The practical method is proposed for analyzing the ISSF for the SLJ. The analysis method focuses on the FEM stress at the interface end by applying the same mesh pattern to the unknown and reference models. It is found that the independent technique useful for the bonded plate and butt joint cannot be applied to the SLJ because the singular stress field of the SLJ consists of two singular stress terms. The FEM stress is divided to two FEM stresses by applying the unknown and reference models to different minimum element sizes. Then, the practicality of the present method is examined by applying to the previous tensile test results of the SLJ composed of the aluminum alloy and the epoxy resin. The ISSFs for the SLJ were calculated by changing the adhesive thickness t 2 and the overlap length l 2. In the case of the SLJ with 225 mm in total length and 7 mm in adherend thickness, it was found that the similar singular stress fields are formed in the range of 0.15 mm ≤ t 2 ≤ 0.9mm and 15 mm ≤ l 2 ≤ 50 mm. It is shown that the critical ISSFs at the fracture are constant in the range.

  1. A preliminary evaluation of limb salvage surgery for osteosarcoma around knee joint.

    Directory of Open Access Journals (Sweden)

    Xing Wu

    Full Text Available OBJECTIVE: To evaluate the effectiveness and drawbacks of diversified procedures of limb salvage surgery (LSS, providing a reference of rational surgical criterion of LSS. METHODS: Fifty eight patients with stage IIB extremity osteosarcoma around knee joint area between 1992 and 2002 were studied retrospectively. Among them, 43 patients were treated by LSS followed by reconstruction. Reconstruction approaches included re-implantation of irradiation-devitalized tumor bone (n = 12, autoclaving-devitalized tumor bone (n = 8, prosthetic replacement (n = 11, allograft transplantation (n = 8 and vascularized fibula autograft implantation (n = 4. Amputations were performed in 15 patients. Patients were followed up for 6-16 years. RESULTS: There were no significant difference between LSS and amputation groups regarding disease free survival and local recurrence rates. The actuarial 5-year continuous disease free survival and local recurrence rate were 30.0% and 25.0% in patients of devitalized LSS group, whereas those were 56.5% and 8.7% in patients of non-devitalized reconstruction group. The complication rate was significantly higher in LSS group compared to amputation group (P = 0.003. CONCLUSION: LSS with non-devitalized procedures is the optimal treatment for osteosarcoma around knee joint area. Prosthesis implantation is the preferred option for bone reconstruction following LSS. Prevention and treatment of post-operative complications should be paid more attention to get good long-term outcomes of surgery.

  2. Evaluation of Patient-Oriented Standards of Joint Commission International in Gilan and Mazandaran Teaching Hospitals

    Directory of Open Access Journals (Sweden)

    Ghaseminejhad

    2016-08-01

    Full Text Available Background Medical tourism, a multi-million-dollar industry, has had a significant effect in economic flourishing, creating jobs, and preventing the outflow of currency. Objectives The aim of this study was to evaluate teaching hospitals affiliated to Gilan and Mazandaran University of Medical Sciences, according to joint commission international (JCI standards. Methods This was a descriptive cross sectional study conducted among teaching hospitals affiliated to Gilan and Mazandaran University of Medical Sciences during year 2015. To collect data and evaluate the hospitals, patient-oriented standards of JCI was applied. Results Amongst the eight standards, international patient safety goals (IPSG (with a score of 87.5% had the highest, and patient and family education (PFE (with a score of 53.75% had the lowest score. Hospital “4” with a score of 90.41%, had the highest, and hospital “7” with 58.90%, had the lowest rate of compliance to the standards. According to the Mann-Whitney test, the observed statistics considering a P value of ≤ 0.05 level, was not significant, therefore on a 95% certainty level, there was no significant difference between hospitals in Gilan and Mazandaran, regarding compliance with standards. Overall, the hospitals under study were relatively prepared for attracting medical tourists. Conclusions According to the results, it seems that more planning and implementation of projects is required to strengthen the axes of the joint commission regarding accreditation of hospitals and attraction of medical tourists to these centers, especially foreign tourists. Researchers are recommended to pay special attention to the university of medical sciences of two provinces for the establishment of standards and utilization of professional consultants.

  3. Evaluation of MRI protocols for the assessment of lumbar facet joints after MR-guided focused ultrasound treatment

    OpenAIRE

    Krug, Roland; Do, Loi; Rieke, Viola; Wilson, Mark W.; Saeed, Maythem

    2016-01-01

    Background MR-guided focused ultrasound (MRgFUS) might be a very safe and effective minimally invasive technique to treat facet joint pain caused by arthritis and other degenerative changes. However, there are still safety concerns for this treatment and challenges regarding MR imaging and temperature mapping due to susceptibility effects between the bone and soft tissue near the joint, which has resulted in poor MR image quality. The goal of this research was to evaluate multiple magnetic re...

  4. Evaluation and management of adult shoulder pain: a focus on rotator cuff disorders, acromioclavicular joint arthritis, and glenohumeral arthritis.

    Science.gov (United States)

    Armstrong, April

    2014-07-01

    Shoulder pain is a common reason for a patient to see their primary care physician. This article focuses on the evaluation and management of 3 common shoulder disorders; rotator cuff disorders, acromioclavicular joint arthritis, and glenohumeral joint arthritis. The typical history and physical examination findings for each of these entities are highlighted, in addition to treatment options. Copyright © 2014 Elsevier Inc. All rights reserved.

  5. Evaluation of early rheumatic disorders in PIP joints using a cw-transillumination method: first clinical results

    Science.gov (United States)

    Prapavat, Viravuth; Luhmann, Till; Krause, Andreas; Backhaus, Marina; Beuthan, Juergen; Mueller, Gerhard J.

    1998-01-01

    This paper presents first clinical results of an in vivo experimental study on the detection of early pathological changes of rheumatoid arthritis (RA) using a near IR cw- transillumination method on finger joints (PIP). The inflammation of a joint system when caused by RA leads to changes in the synovial membrane and synovial. Measurements have shown that these rheumatic induced processes results in a variation in optical properties within the joint system. Using a cw system the PIP-joint is transilluminated with diode lasers at the articular cavity in order to use the entire scattered distribution of the transmitted radiation intensity for diagnostic purposes. The study includes results of in vivo measurements on 24 joints with known status and the evaluation of the feasibility of different distribution properties for detection of early RA.

  6. The role of three-dimensional computed tomography in the evaluation of temporomandibular joint ankylosis

    Directory of Open Access Journals (Sweden)

    Thangavelu Kavin

    2012-01-01

    Full Text Available Aims: The aim of the study was to evaluate the role of three-dimensional computed tomography (3D-CT in the assessment of temporomandibular joint (TMJ ankylosis and its importance in treatment planning. The objectives of study were to measure and assess the mediolateral extent of ankylosis mass in 3D-CT and to compare the extent with intraoperative assessment. The study was also aimed to measure the coronoid process elongation in 3D-CT and its significance in treatment planning. Materials and Methods: This prospective study included 3D-CT evaluation of 11 patients with TMJ ankylosis during the period of February 2006-October 2007. Results: The 3D-CT assessment provided the length of the coronoid process and the relation of vital structures including maxillary artery to the ankylosed mass. Measurement of ankylosed mass also aids in preoperative measurement of the graft required to reconstruct the defect following removal of the ankylosed mass. Conclusion: Our study concludes that 3D-CT is a useful tool in the diagnosis and treatment planning of TMJ ankylosis.

  7. Evaluation of the bone mineral density of the subjects with avascular necrosis of hip joint.

    Science.gov (United States)

    Karimi, Mohammad Taghi; Nodoshan, Seyed Mohammad Mousavi

    2016-01-01

    The head of femur is deformed in subjects with Leg Calve Perthes Disease (LCPD). It may be due to an increase in loads applied on the hip, decrease in hip joint containment and decrease in bone mineral density (BMD) of femur. Unfortunately there is not enough evidence regarding BMD of femur in subjects with LCPD. Therefore, the aim of this study is to evaluate BMD in subjects with Perthes disease. Two subjects with LCPD participated in this study. The BMD and Young modulus of elasticity (E) of different parts of femur of both Perthes and sound sides were evaluated by use of Mimics software. The difference between BMD of femur in both sides of each subject was compared by use of two sample t test. There was no difference between the BMD and E modulus of femur in Perthes and sound sides in both subjects (p-value>0.05). As there is no difference between the BMD of femur in Perthes side, it can be concluded that the deformation of femur in these subjects may not be due to a change in BMD.

  8. The Measurement of Rigidity in Elbow Joint: An Objective Method for the Evaluation of Parkinson's disease

    Directory of Open Access Journals (Sweden)

    B. Sepehri

    2007-06-01

    Full Text Available Introduction: One of the most common syndromes in Parkinson's disease (PD is rigidity. Currently, an index is used to evaluate the level of PD by the clinical measurement of rigidity in the upper extremity. The index uses a subjective method called Unified Parkinson's Disease Rating System (UPDRS. The subjective nature of this method makes the influence of physician in the measurement of rigidity possible. Hence, the development of a new standard method based on objective indices is needed. Materials and Methods: In this research, a new device was fabricated and used to measure the viscous and elastic indices and the range of motion during passive movement of elbow joint. The relation between each index and the level of illness was analyzed. The parameters were measured on 41 patients and 11 controls. The indices were extracted using Matlab-R14 software and the statistical analysis was performed using Spss-13. Results: Although there were significant differences in both the viscous and elastic indices between the pair groups and also among the UPDRS groups, but better correlations of the viscous ones and UPDRS were found.  The range of motion by itself has no good correlation with the level of the disease. Discussion and Conclusion: Based on the obtained results, it can be inferred that using viscous indices of rigidity may have an advantage over the elastic ones for the evaluation of Parkinson’s disease. Upon conducting more trials and also considering the sub indices in different parts of the range of motion, the method used here may become a standard objective method for the evaluation of Parkinson's disease.

  9. Solar Alpha Rotary Joint (SARJ) Lubrication Interval Test and Evaluation (LITE). Post-Test Grease Analysis

    Science.gov (United States)

    Golden, Johnny L.; Martinez, James E.; Devivar, Rodrigo V.

    2015-01-01

    The Solar Alpha Rotary Joint (SARJ) is a mechanism of the International Space Station (ISS) that orients the solar power generating arrays toward the sun as the ISS orbits our planet. The orientation with the sun must be maintained to fully charge the ISS batteries and maintain all the other ISS electrical systems operating properly. In 2007, just a few months after full deployment, the starboard SARJ developed anomalies that warranted a full investigation including ISS Extravehicular Activity (EVA). The EVA uncovered unexpected debris that was due to degradation of a nitride layer on the SARJ bearing race. ISS personnel identified the failure root-cause and applied an aerospace grease to lubricate the area associated with the anomaly. The corrective action allowed the starboard SARJ to continue operating within the specified engineering parameters. The SARJ LITE (Lubrication Interval Test and Evaluation) program was initiated by NASA, Lockheed Martin, and Boeing to simulate the operation of the ISS SARJ for an extended time. The hardware was designed to test and evaluate the exact material components used aboard the ISS SARJ, but in a controlled area where engineers could continuously monitor the performance. After running the SARJ LITE test for an equivalent of 36+ years of continuous use, the test was opened to evaluate the metallography and lubrication. We have sampled the SARJ LITE rollers and plate to fully assess the grease used for lubrication. Chemical and thermal analysis of these samples has generated information that has allowed us to assess the location, migration, and current condition of the grease. The collective information will be key toward understanding and circumventing any performance deviations involving the ISS SARJ in the years to come.

  10. Quantitative in vivo MRI evaluation of lumbar facet joints and intervertebral discs using axial T2 mapping

    Energy Technology Data Exchange (ETDEWEB)

    Stelzeneder, David; Messner, Alina; Scheurecker, Georg; Goed, Sabine; Friedrich, Klaus M.; Trattnig, Siegfried [Medical University of Vienna, Department of Radiology, MR Centre-High Field MR, Vienna (Austria); Vlychou, Marianna [Medical University of Vienna, Department of Radiology, MR Centre-High Field MR, Vienna (Austria); University Hospital of Larissa, Department of Radiology, Larissa (Greece); Welsch, Goetz H. [Medical University of Vienna, Department of Radiology, MR Centre-High Field MR, Vienna (Austria); University of Erlangen, Department of Trauma Surgery, Erlangen (Germany); Pieber, Karin; Pflueger, Verena [Medical University of Vienna, Department of Physical Medicine and Rehabilitation, Vienna (Austria)

    2011-11-15

    To assess the feasibility of T2 mapping of lumbar facet joints and intervertebral discs in a single imaging slab and to compare the findings with morphological grading. Sixty lumbar spine segments from 10 low back pain patients and 5 healthy volunteers were examined by axial T2 mapping and morphological MRI at 3.0 Tesla. Regions of interest were drawn on a single slice for the facet joints and the intervertebral discs (nucleus pulposus, anterior and posterior annulus fibrosus). The Weishaupt grading was used for facet joints and the Pfirrmann score was used for morphological disc grading (''normal'' vs. ''abnormal'' discs). The inter-rater agreement was excellent for the facet joint T2 evaluation (r = 0.85), but poor for the morphological Weishaupt grading (kappa = 0.15). The preliminary results show similar facet joint T2 values in segments with normal and abnormal Pfirrmann scores. There was no difference in mean T2 values between facet joints in different Weishaupt grading groups. Facet joint T2 values showed a weak correlation with T2 values of the posterior annulus (r = 0.32) This study demonstrates the feasibility of a combined T2 mapping approach for the facet joints and intervertebral discs using a single axial slab. (orig.)

  11. Research on elaboration of the evaluation guidelines for activities implemented jointly; Kyodo jisshi katsudo hyoka guide line sakutei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Elaboration of the evaluation guidelines for activities implemented jointly (AIJ) was researched to prevent the earth from warming. AIJ is the means to globally promote countermeasures against global warming cost-effectively by optimally combining every country`s technology, know-how and fund. AIJ was established in the 1st Conference of the Parties (COPI) of the United Nations Framework Convention on Climate Change in March, 1995. The pilot phase of AIJ is first carried out by voluntary workers jointly with developing countries under the agreement of the parties. The current situation of activities is reported in COPI as materials for evaluation of AIJ. To promote AIJ, elaboration of the evaluation guidelines for AIJ Japan program is also necessary for Japan. This research arranged the contents of the evaluation guidelines and the method of classifying projects for AIJ Japan program, and carried out some case studies of promising projects to reduce greenhouse gas emission for future proposal. 3 figs., 31 tabs.

  12. The Challenges of Data Quality Evaluation in a Joint Data Warehouse.

    Science.gov (United States)

    Bae, Charles J; Griffith, Sandra; Fan, Youran; Dunphy, Cheryl; Thompson, Nicolas; Urchek, John; Parchman, Alandra; Katzan, Irene L

    2015-01-01

    The use of clinically derived data from electronic health records (EHRs) and other electronic clinical systems can greatly facilitate clinical research as well as operational and quality initiatives. One approach for making these data available is to incorporate data from different sources into a joint data warehouse. When using such a data warehouse, it is important to understand the quality of the data. The primary objective of this study was to determine the completeness and concordance of common types of clinical data available in the Knowledge Program (KP) joint data warehouse, which contains feeds from several electronic systems including the EHR. A manual review was performed of specific data elements for 250 patients from an EHR, and these were compared with corresponding elements in the KP data warehouse. Completeness and concordance were calculated for five categories of data including demographics, vital signs, laboratory results, diagnoses, and medications. In general, data elements for demographics, vital signs, diagnoses, and laboratory results were present in more cases in the source EHR compared to the KP. When data elements were available in both sources, there was a high concordance. In contrast, the KP data warehouse documented a higher prevalence of deaths and medications compared to the EHR. Several factors contributed to the discrepancies between data in the KP and the EHR-including the start date and frequency of data feeds updates into the KP, inability to transfer data located in nonstructured formats (e.g., free text or scanned documents), as well as incomplete and missing data variables in the source EHR. When evaluating the quality of a data warehouse with multiple data sources, assessing completeness and concordance between data set and source data may be better than designating one to be a gold standard. This will allow the user to optimize the method and timing of data transfer in order to capture data with better accuracy.

  13. Molten-Shape Prediction and Fracture-Life Evaluation of Micro-Solder Joint in Semiconductor Structure

    Science.gov (United States)

    Tanie, Hisashi

    The reliability of a micro-solder joint in a semiconductor structure depends on its solder shape. Therefore, many methods of predicting the molten-solder shape have been proposed. However, conventional methods cannot be used to accurately predict the shape of a miniaturized solder. In a miniaturized solder joint, molten solder greatly changes its shape during the reflow process, and even topology changes (e.g., merging with another solder in a neighboring joint or splitting into several pieces) might occur. Conventional methods cannot be used for expressing these phenomena. To predict a miniaturized solder shape, we developed a new shape-prediction method based on the moving-particle semi-implicit (MPS) method. In the MPS method, a continuum is expressed as an assembly of particles. In contrast to finite element analysis (FEA), our new method can easily express large deformation and topology changes because the continuum does not need to be divided into elements. Moreover, we evaluated the fracture life of a solder joint with the predicted solder shape by coupling our shape-prediction method with a crack-propagation analysis method that we also developed. The crack-propagation is used for automatically calculating a crack-initiation point and crack-propagation paths, and the fracture life is evaluated quantitatively. We applied this coupling method to evaluate fracture lives of various solder joints and found that a difference in solder shape caused a difference in crack-initiation points, crack-propagation paths, and fracture lives.

  14. Evaluation of remission of temporomandibular joints pain as a result of treatment of dysfunction using intraarticular injection.

    Science.gov (United States)

    Pihut, Małgorzata; Górecka, Małgorzata; Ceranowicz, Piotr

    2017-01-01

    The temporomandibular joint pain, which occurs in the course of temporomandibular joint dysfunction, is one of the main clinical problems in the treatment of joint disc displacement. The aim of the study was to evaluate changes in temporomandibular joints pain in treatment supporting disc displacement without reduction using intra-articular injection of hyaluronic acid and platelet-rich plasma. The study consisted of a group of 60 patients, aged 35-49, who reported for treatment, because of pain in the preauricural area. The functional examination stated disk dicplacement without reduction, along with the accompanying pain of temporomandibular joints. Patients were treated between January 2015 and February 2017. They were divided into two groups of 30 persons. The intraarticular injection of hyaluronic acid was administered in the I-test group, and the injection of platelet-rich plasma in the control group. This treatment was carried out parallel to the use of repositioning splits. Analysis of regression of symptoms other than intensity of pain during the treatment, evaluated in this study shows a decrease of individual symptoms, but the results of the regression of pain between two groups did not differ statistically significantly, because "p" is bigger than 0.05. The results of the research show the clinical benefits of application of hyaluronic acid and plate rich plasma in the treatment of temporomandibular joint dysfunction.

  15. Comprehensive Assessment and Evaluation of Students with Learning Disabilities: A Paper Prepared by the National Joint Committee on Learning Disabilities

    Science.gov (United States)

    Learning Disability Quarterly, 2011

    2011-01-01

    The National Joint Committee on Learning Disabilities (NJCLD) strongly supports comprehensive assessment and evaluation of students with learning disabilities by a multidisciplinary team for the identification and diagnosis of students with learning disabilities. Comprehensive assessment of individual students requires the use of multiple data…

  16. Good validity and reliability of the forgotten joint score in evaluating the outcome of total knee arthroplasty

    DEFF Research Database (Denmark)

    Thomsen, Morten G; Latifi, Roshan; Kallemose, Thomas

    2016-01-01

    Background and purpose - When evaluating the outcome after total knee arthroplasty (TKA), increasing emphasis has been put on patient satisfaction and ability to perform activities of daily living. To address this, the forgotten joint score (FJS) for assessment of knee awareness has been developed...

  17. Safety evaluation of joint and conventional lane merge configurations for freeway work zones.

    Science.gov (United States)

    Ishak, Sherif; Qi, Yan; Rayaprolu, Pradeep

    2012-01-01

    Inefficient operation of traffic in work zone areas not only leads to an increase in travel time delays, queue length, and fuel consumption but also increases the number of forced merges and roadway accidents. This study evaluated the safety performance of work zones with a conventional lane merge (CLM) configuration in Louisiana. Analysis of variance (ANOVA) was used to compare the crash rates for accidents involving fatalities, injuries, and property damage only (PDO) in each of the following 4 areas: (1) advance warning area, (2) transition area, (3) work area, and (4) termination area. The analysis showed that the advance warning area had higher fatality, injury, and PDO crash rates when compared to the transition area, work area, and termination area. This finding confirmed the need to make improvements in the advance warning area where merging maneuvers take place. Therefore, a new lane merge configuration, called joint lane merge (JLM), was proposed and its safety performance was examined and compared to the conventional lane merge configuration using a microscopic simulation model (VISSIM), which was calibrated with real-world data from an existing work zone on I-55 and used to simulate a total of 25 different scenarios with different levels of demand and traffic composition. Safety performance was evaluated using 2 surrogate measures: uncomfortable decelerations and speed variance. Statistical analysis was conducted to determine whether the differences in safety performance between both configurations were significant. The safety analysis indicated that JLM outperformed CLM in most cases with low to moderate flow rates and that the percentage of trucks did not have a significant impact on the safety performance of either configuration. Though the safety analysis did not clearly indicate which lane merge configuration is safer for the overall work zone area, it was able to identify the possibly associated safety changes within the work zone area under

  18. Colour Doppler ultrasonography evaluation of vascularization in the wrist and finger joints in rheumatoid arthritis patients and healthy subjects

    Energy Technology Data Exchange (ETDEWEB)

    Carotti, M. [Department of Radiology, Poliytechnic University of Marche, Ancona (Italy); Salaffi, F., E-mail: fsalaff@tin.it [Department of Rheumatology, Poliytechnic University of Marche, Ospedale A. Murri - Via dei Colli 52, 60035 Jesi, Ancona (Italy); Morbiducci, J. [Department of Radiology, Poliytechnic University of Marche, Ancona (Italy); Ciapetti, A., E-mail: ciapetti.a@libero.it [Department of Rheumatology, Poliytechnic University of Marche, Ospedale A. Murri - Via dei Colli 52, 60035 Jesi, Ancona (Italy); Bartolucci, L. [Department of Radiology, Poliytechnic University of Marche, Ancona (Italy); Gasparini, S. [Department of Rheumatology, Poliytechnic University of Marche, Ospedale A. Murri - Via dei Colli 52, 60035 Jesi, Ancona (Italy); Ferraccioli, G. [Division of Rheumatology, Catholic University of the Sacred Heart, Rome (Italy); Giuseppetti, G.M. [Department of Radiology, Poliytechnic University of Marche, Ancona (Italy); Grassi, W. [Department of Rheumatology, Poliytechnic University of Marche, Ospedale A. Murri - Via dei Colli 52, 60035 Jesi, Ancona (Italy)

    2012-08-15

    Objectives: To evaluate the presence of blood flow by colour Doppler ultrasonography (CDUS) in the wrist and finger joints of rheumatoid arthritis (RA) patients and healthy subjects and to define a cut-off value of CDUS resistive index (RI). Methods: Forty-three patients with RA and 43 healthy controls were examined by CDUS. The wrists, second and third metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints were evaluated in each patient and healthy subject. Spectral Doppler analysis was performed in order to characterize the type of flow and a mean RI was measured to define a cut-off level. The area under receiver operating characteristic curve was used to evaluate the screening method's performance. Results: Flow was detected in 219 of the 430 total joints (50.9%) of RA patients (111 in the wrists, 49 in the MCP and 30 in the PIP joints). Healthy subjects had a quantifiable flow in 45 of the 430 joints (10.5%) and, in particular, 39 (86.4%) in the wrist, 5 (11.14%) in the MCP and 1 (2.2%) in the PIP joints. The intra- and inter-reader agreements for the detection of Doppler signal were very good (kappa 0.82 and 0.89, respectively). Mean RI values were 0.72 {+-} 0.06 in RA patients and 0.86 {+-} 0.06 in healthy subjects (p < 0.01). At cut-off point of RI < 0.79 the sensitivity was 89.6% and the specificity was 78.8% (positive likelihood ratio 4.22). Conclusion: DUS is a useful tool for the detection of abnormal blood flow in inflammatory joints of RA patients.

  19. Tc-99m MDP bone scintigraphy in the evaluation of the joint damage in asymptomatic alpine ski racers.

    Science.gov (United States)

    Varoğlui, Erhan; Yildirim, Mustafa; Gürsoy, Recep; Seven, Bedri; Uslus, Hatice; Çoğalgil, Şirzat; Kiyici, Fatih

    2014-01-01

    To evaluate the role of 99m-technetium methylene diphosphonate (Tc-99m MDP) bone scintigraphy on the detection of joint damage in asymptomatic alpine ski racers. This study included 20 male asymptomatic alpine ski racers (age range: 18-21 years). None of the skiers had a history of ski crashes. Bone scan findings of the racers were examined with Tc-99m MDP bone scintigraphy during the active racing season and the inactive training season. Planar anterior and posterior images of hip, knee, and ankle joints were obtained 4 h after intravenous injection of 20 mCi Tc-99m MDP. All images were interpreted visually by 2 experienced nuclear medicine physicians. Free regions of interest were drawn on hip, knee, and ankle joints, as well as background regions. Joint-to-background ratios were calculated for each joint, and the uptake ratios of both right and left joints during active ski season were compared to those during the inactive training period. Uptake ratios of the right and left hip, knee, and ankle joints were significantly higher during the active racing period than those calculated during the inactive period (P alpine ski racers and can be used successfully when MRI is unavailable.

  20. Performance Evaluation of New Joint EDF-RM Scheduling Algorithm for Real Time Distributed System

    Directory of Open Access Journals (Sweden)

    Rashmi Sharma

    2014-01-01

    Full Text Available In Real Time System, the achievement of deadline is the main target of every scheduling algorithm. Earliest Deadline First (EDF, Rate Monotonic (RM, and least Laxity First are some renowned algorithms that work well in their own context. As we know, there is a very common problem Domino's effect in EDF that is generated due to overloading condition (EDF is not working well in overloading situation. Similarly, performance of RM is degraded in underloading condition. We can say that both algorithms are complements of each other. Deadline missing in both events happens because of their utilization bounding strategy. Therefore, in this paper we are proposing a new scheduling algorithm that carries through the drawback of both existing algorithms. Joint EDF-RM scheduling algorithm is implemented in global scheduler that permits task migration mechanism in between processors in the system. In order to check the improved behavior of proposed algorithm we perform simulation. Results are achieved and evaluated in terms of Success Ratio (SR, Average CPU Utilization (ECU, Failure Ratio (FR, and Maximum Tardiness parameters. In the end, the results are compared with the existing (EDF, RM, and D_R_EDF algorithms. It has been shown that the proposed algorithm performs better during overloading condition as well in underloading condition.

  1. In vitro evaluation of thermomechanic coupling in conical implant-to-abutment joint.

    Science.gov (United States)

    Traini, Tonino; Di Iorio, Donato; Caputi, Sergio; Degidi, Marco; Iezzi, Giovanna; Piattelli, Adriano

    2007-12-01

    This study investigates the use of thermomechanic abutment-to-implant coupling. Ten 3.5 x 1 mm commercially pure titanium Ankylos implants (Dentsply Friadent, Mannheim, Germany) and 10 standard abutment of titanium alloy Ti6Al4V were used in the present study. All fixtures were mounted on hold specimen provided of a 10-ohm electrical resistance to maintain the fixture at 37 degrees C +/- 3 degrees C during the entire test and to evaluate the influence of the coefficient of thermal expansion on joined conical abutment. The threading part of all abutments was cut off using a diamond disc. All abutment implants were coupled at 35 N using a universal testing machine (Lloyd 30K, Lloyd Instruments Ltd. Segensworth, UK). Five abutments were heated at 37 degrees C +/- 3 degrees C, whereas the reaming were cooled at 0 degrees C +/- 3 degrees C before connection. To measure the difference a pull-out test was performed. The results were statistically analyzed using unpaired t test at P < 0.05. The cooled specimens showed a result (mean +/- SD) of 421.6 +/- 55.20 N, whereas for heated specimens the result was 238.4 +/- 42.27 N. The difference was statistically significant (P = 0.001). The thermomechanic coupling significantly increases the performance of the conical joint.

  2. Evaluation on joint toxicity of chlorinated anilines and cadmium to Photobacterium phosphoreum and QSAR analysis.

    Science.gov (United States)

    Jin, Hao; Wang, Chao; Shi, Jiaqi; Chen, Lei

    2014-08-30

    The individual IC50 (the concentrations causing a 50% inhibition of bioluminescence after 15min exposure) of cadmium ion (Cd) and nine chlorinated anilines to Photobacterium phosphoreum (P. phosphoreum) were determined. In order to evaluate the combined effects of the nine chlorinated anilines and Cd, the toxicities of chlorinated anilines combined with different concentrations of Cd were determined, respectively. The results showed that the number of chlorinated anilines manifesting synergy with Cd decreased with the increasing Cd concentration, and the number manifesting antagonism decreased firstly and then increased. The joint toxicity of mixtures at low Cd concentration was weaker than that of most binary mixtures when combined with Cd at medium and high concentrations as indicated by TUTotal. QSAR analysis showed that the single toxicity of chlorinated anilines was related to the energy of the lowest unoccupied molecular orbital (ELUMO). When combined with different concentrations of Cd, the toxicity was related to the energy difference (EHOMO-ELUMO) with different coefficients. Van der Waals' force or the complexation between chlorinated anilines and Cd had an impact on the toxicity of combined systems, which could account for QSAR models with different physico-chemical descriptors. Copyright © 2014 Elsevier B.V. All rights reserved.

  3. Identification and pre-feasibility evaluation of potential joint implementation demonstration projects in Costa Rica

    Energy Technology Data Exchange (ETDEWEB)

    LeBlanc, A.; Dudek, D.J.

    1994-12-30

    The report identifies and evaluates (primarily on grounds of environmental feasibility or integrity of carbon offsets produced) five potential demonstration joint implementation projects in Costa Rica. The five projects reviewed are a biomass conversion project at a large cement factory (NCSA); two watershed restoration and management projects, one with a large preservation component (JASEC and San Lorenzo); a tropical forest preservation effort (Esquinas); and the creation of a biological corridor through land management and ecotourism (Monteverde). Projects were ranked relative to the criteria as either satisfactory or uncertain, depending on whether or not there were uncertainties related to meeting the criteria. All five projects appear to be satisfactory in terms of other values, such as Costa Rican development priorities, local environmental and economic benefits, replaceability and local support. In terms of environmental feasibility, or the ability to produce real, measurable and valid CO{sub 2} offsets in the context of the FCCC, all project but Esquinas are satisfactory in terms of baseline assumptions and monitoring, or could become so with easily implemented adjustments to the project design. In terms of durability or security of the offset, all projects except JASEC were judged to be satisfactory or capable of becoming so with a feasible modification to the project design. 11 refs., 2 tabs.

  4. Joint evaluation of communication quality and user experience in an audio-visual virtual reality meeting

    DEFF Research Database (Denmark)

    Møller, Anders Kalsgaard; Hoffmann, Pablo F.; Carrozzino, Marcello

    2013-01-01

    The state-of-the-art speech intelligibility tests are created with the purpose of evaluating acoustic communication devices and not for evaluating audio-visual virtual reality systems. This paper present a novel method to evaluate a communication situation based on both the speech intelligibility...

  5. Clinical evaluation of hip joint rotation range of motion in adults.

    Science.gov (United States)

    Kouyoumdjian, P; Coulomb, R; Sanchez, T; Asencio, G

    2012-02-01

    Data on hip joint rotation range of motion (ROM) are rare; the methods of measurement vary and reproducibility has not been evaluated, in particular in relation to the subject's position (prone or supine, seated). Hip joint rotation ROM is symmetrical, and ROM is not modified by the patient's position when data is obtained. This series included 120 adults between 20 and 60 years old (71 women, 49 men), who had no hip, spine or lower extremity disorders. External (ER) and internal (IR) rotation ROM was obtained using a photographic method by two observers. Measurements were obtained with the patient in three positions: the dorsal decubitus (supine) (P1), and ventral decubitus (prone) (P2) with the hip in extension and seated with the hip in flexion (P3). Hip rotation ROM was P1: 68.1° (ER=38.5°; IR=29.6°); P2: 77.1°(ER=41.8°; IR=35.2°); P3: 78.5° (ER=78.5°; IR=37.9°) with no significant difference among the three positions. Interobserver reproducibility was satisfactory (concordance correlation coefficient (ccc) 0.7) and was comparable in the three positions with a ccc of 0.7072 (P1), 0.7426 (P2) and 0.7332 (P3), respectively. Hip rotation ROM balance was ER predominant in 47.5%, neutral in 39.5% and IR predominant in 13%. Hip rotation ROM balance was symmetric in both hips in 73 subjects (61%). Hip rotation ROM was reduced with age (P<0.0001), and was 4.7° less in men (P=0.0078), and in overweight subjects (P<0.0006). Our values are probably lower than those in the literature because of the difference in study population. In our series, age, BMI and gender seemed to be determining factors. Hip rotation ROM balance is usually ER predominant or neutral. Hip rotation ROM can be measured in the three positions with no significant difference, with satisfactory interobserver reproducibility for each. Diagnostic prospective study: level III. Copyright © 2012 Elsevier Masson SAS. All rights reserved.

  6. Computed tomography evaluation of the temporomandibular joint in Class I malocclusion patients: condylar symmetry and condyle-fossa relationship.

    Science.gov (United States)

    Rodrigues, Andréia Fialho; Fraga, Marcelo Reis; Vitral, Robert Willer Farinazzo

    2009-08-01

    The purpose of this study was to investigate the condyle-fossa relationship, the concentric position of the condyles, and the dimensional and positional symmetries between the right and left condyles in subjects with Class I malocclusion. Thirty subjects from 13 to 30 years of age with Class I malocclusion had computed tomography imaging of the temporomandibular joints. The images obtained from axial slices were evaluated for possible asymmetries in size and position between the condylar processes associated with this malocclusion. The images obtained from sagittal slices were used to assess the depth of the mandibular fossa, the condyle-fossa relationship, and the concentric position of the condyles of this malocclusion. Paired Student t tests were applied, and Pearson product moment correlations were determined after measurements on both sides were obtained. We found no statistically significant asymmetries between the condylar processes in this sample. No statistically significant asymmetries were found in the mandibular fossa depth, the anterior joint space, and the superior joint space. The posterior joint space showed statistically significant asymmetry (P temporomandibular joint. Evaluation of the concentric position of the condyles in their mandibular fossae showed nonconcentric positioning for the 2 sides.

  7. Bond strength evaluation in adhesive joints using NDE and DIC methods

    Science.gov (United States)

    Poudel, Anish

    Adhesive bonding of graphite epoxy composite laminates to itself or traditional metal alloys in modern aerospace and aircraft structural applications offers an excellent opportunity to use the most efficient and intelligent combination of materials available thus providing an attractive package for efficient structural designs. However, one of the major issues of adhesive bonding is the occasional formation of interfacial defects such as kissing or weak bonds in the bondline interface. Also, there are shortcomings of existing non-destructive evaluation (NDE) methods to non-destructively detect/characterize these interfacial defects and reliably predicting the bond shear strength. As a result, adhesive bonding technology is still not solely implemented in primary structures of an aircraft. Therefore, there is a greater demand for a novel NDE tool that can meet the existing aerospace requirement for adhesive bondline characterization. This research implemented a novel Acoustography ultrasonic imaging and digital image correlation (DIC) technique to detect and characterize interfacial defects in the bondline and determine bond shear strength in adhesively bonded composite-metal joints. Adhesively bonded Carbon Fiber Reinforced Plastic (CFRP) laminate and 2024-T3 Aluminum single lap shear panels subjected to various implanted kissing/weak bond defects were the primary focus of this study. Kissing/weak bonds were prepared by controlled surface contamination in the composite bonding surface and also by improperly mixing the adhesive constituent. SEM analyses were also conducted to understand the surface morphology of substrates and their interaction with the contaminants. Morphological changes were observed in the microscopic scale and the chemical analysis confirmed the stability of the contaminant at or very close to the interface. In addition, it was also demonstrated that contaminants migrated during the curing of the adhesive from CFRP substrate which caused a

  8. MR imaging of the metacarpophalangeal joints of the fingers: evaluation of 38 patients with chronic joint disability

    Energy Technology Data Exchange (ETDEWEB)

    Theumann, Nicolas H. [AP-HP - Universite Paris V, Service de Radiologie B, CHU Cochin, Paris (France); Veterans Administration Medical Center, Department of Radiology, San Diego (United States); CHUV, Service de Radiologie, Lausanne (Switzerland); Pessis, Eric; Chevrot, Alain [AP-HP - Universite Paris V, Service de Radiologie B, CHU Cochin, Paris (France); Lecompte, Martin [Universite de Sherbrooke, Department of Radiology, Sherbrooke, PQ (Canada); Viet, Dominique Le; Valenti, Philippe [Clinique Jouvenet, Institut de la Main, Paris (France); Bittoun, Jacques [AP-HP - Universite Paris XI, Le Kremlin-Bicetre, CIERM, Hopital de Bicetre (France); Schnyder, Pierre [CHUV, Service de Radiologie, Lausanne (Switzerland); Resnick, Donald [Veterans Administration Medical Center, Department of Radiology, San Diego (United States); Drape, Jean-Luc [AP-HP - Universite Paris V, Service de Radiologie B, CHU Cochin, Paris (France); AP-HP - Universite Paris XI, Le Kremlin-Bicetre, CIERM, Hopital de Bicetre (France)

    2005-04-01

    To report the MR imaging findings of painful injured metacarpophalangeal (MCP) joints of the fingers. MR imaging of 39 injured MCP joints in 38 patients was performed after a mean delay of 8.8 months. The MR images were obtained with the fingers in extended and flexed positions using T2-weighted and T1-weighted sequences before and after intravenous injection of a gadolinium compound. Ten patients were treated surgically. Mean clinical follow-up was 1.8 years. Tears of the collateral ligaments were the most common lesion (30/39), most being radial in location. Contrast-enhanced axial T1-weighted images with the MCP joint in a flexed position showed these lesions optimally. Ten tears were partial and 20 were complete. In 13 patients, MR images showed 17 associated lesions including injuries of the extensor hood (10/17), interosseous tendon (3/17), palmar plate (3/17), and an osteochondral lesion (1/17). Sagittal MR images were essential to highlight palmar plate tears. Partial or complete tears of the collateral ligaments are prevalent MR imaging findings in patients with chronic disability resulting from injuries to the MCP joints. Although conservative treatment generally is sufficient for isolated injuries of the collateral ligaments, surgical repair is often required in cases of more extensive injuries. MR imaging may clearly delineate associated lesions of and about the MCP joints. (orig.)

  9. Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire (JHEQ): a patient-based evaluation tool for hip-joint disease. The Subcommittee on Hip Disease Evaluation of the Clinical Outcome Committee of the Japanese Orthopaedic Association.

    Science.gov (United States)

    Matsumoto, Tadami; Kaneuji, Ayumi; Hiejima, Yoshimitsu; Sugiyama, Hajime; Akiyama, Haruhiko; Atsumi, Takashi; Ishii, Masaji; Izumi, Kiyoko; Ichiseki, Toru; Ito, Hiroshi; Okawa, Takahiro; Ohzono, Kenji; Otsuka, Hiromi; Kishida, Shunji; Kobayashi, Seneki; Sawaguchi, Takeshi; Sugano, Nobuhiko; Nakajima, Ikumasa; Nakamura, Shigeru; Hasegawa, Yukiharu; Fukuda, Kanji; Fujii, Genji; Mawatari, Taro; Mori, Satoshi; Yasunaga, Yuji; Yamaguchi, Masao

    2012-01-01

    The Japanese Orthopaedic Association Hip Score is widely used in Japan, but this tool is designed to reflect the viewpoint of health-care providers rather than that of patients. In gauging the effect of medical therapies in addition to clinical results, it is necessary to assess quality of life (QOL) from the viewpoint of patients. However, there is no tool evaluating QOL for Japanese patients with hip-joint disease. With the aim of more accurately classifying QOL for Japanese patients with hip-joint disease, we prepared a questionnaire with 58 items for the survey derived from 464 opinions obtained from approximately 100 Japanese patients with hip-joint disease and previously devised evaluation criteria. In the survey, we collected information on 501 cases, and 402 were subjected to factor analysis. From this, we formulated three categories-movement, mental, and pain-each comprising 7 items, for a total of 21 items to be used as evaluation criteria for hip-joint function. The Cronbach's α coefficients for the three categories were 0.93, 0.93, and 0.95, respectively, indicating the high reliability of the evaluation criteria. The 21 items included some related to the Asian lifestyle, such as use of a Japanese-style toilet and rising from the floor, which are not included in other evaluation tools. This self-administered questionnaire may become a useful tool in the evaluation of not only Japanese patients, but also of members of other ethnic groups who engage in deep flexion of the hip joint during daily activities.

  10. Hinged distraction of the hip joint in the treatment of Perthes disease: evaluation at skeletal maturity.

    Science.gov (United States)

    Laklouk, Mohamed Abdel-Rehim; Hosny, Gamal Ahmed

    2012-09-01

    The aim of this work is to determine the effect of this type of treatment on the shape of the femoral head, the range of motion (ROM), radiological changes in the femoral head, and the prognosis of Perthes disease at skeletal maturity. From 1998 to 2007, 53 patients with Perthes disease were treated with a combination of soft tissue release and joint distraction with a hinged monolateral external fixator in 32 patients and by Ilizarov external fixator in 21 patients. Nineteen of our 53 patients attained skeletal maturity and were evaluated in our study. This study included 15 boys and four girls, mean age at surgery 9.3 years (range 7.2-13.1), and mean age at the last follow-up 17.4 years (range 14.9-21.3). The duration of symptoms varied from a period of 6 to 60 months before the operation. Radiographs taken during the fragmentation stage of the disease were classified by the lateral pillar classification of Herring; 19 of our patients attained skeletal maturity and were evaluated. Clinical assessment included the Harris hip score, hip ROM, and limb length discrepancy. Radiographic assessment included sharp transverse acetabular inclination, the uncoverage percentage, the epiphyseal index before surgery (modified Eyre-Brook), at frame removal, and at the last follow-up, the epiphyseal quotient (of Sjovall), and the Stulberg classification. The mean follow-up was 7.2 years (range 4.1-11.3). The mean Harris hip score was 87.1/100 (range 49.2-94.8). An improvement in hip (ROM) of 83.3% of the normal range was restored. There was a marked improvement in the degree of pain and limp postoperatively. The hip ROM was slightly limited in most patients, and seven patients had limb shortening of between 1 and 3 cm. The mean sharp transverse acetabular inclination of the affected side was 44° (range 35-51) compared with 37° for the unaffected side (P=0.042). The mean uncoverage percentage was 36% (range 24-45) compared with 21% for the unaffected side (P=0.027). The mean

  11. A method to screen and evaluate tissue adhesives for joint repair applications

    Directory of Open Access Journals (Sweden)

    Dehne Tilo

    2012-09-01

    Full Text Available Abstract Background Tissue adhesives are useful means for various medical procedures. Since varying requirements cause that a single adhesive cannot meet all needs, bond strength testing remains one of the key applications used to screen for new products and study the influence of experimental variables. This study was conducted to develop an easy to use method to screen and evaluate tissue adhesives for tissue engineering applications. Method Tissue grips were designed to facilitate the reproducible production of substrate tissue and adhesive strength measurements in universal testing machines. Porcine femoral condyles were used to generate osteochondral test tissue cylinders (substrates of different shapes. Viability of substrates was tested using PI/FDA staining. Self-bonding properties were determined to examine reusability of substrates (n = 3. Serial measurements (n = 5 in different operation modes (OM were performed to analyze the bonding strength of tissue adhesives in bone (OM-1 and cartilage tissue either in isolation (OM-2 or under specific requirements in joint repair such as filling cartilage defects with clinical applied fibrin/PLGA-cell-transplants (OM-3 or tissues (OM-4. The efficiency of the method was determined on the basis of adhesive properties of fibrin glue for different assembly times (30 s, 60 s. Seven randomly generated collagen formulations were analyzed to examine the potential of method to identify new tissue adhesives. Results Viability analysis of test tissue cylinders revealed vital cells (>80% in cartilage components even 48 h post preparation. Reuse (n = 10 of test substrate did not significantly change adhesive characteristics. Adhesive strength of fibrin varied in different test settings (OM-1: 7.1 kPa, OM-2: 2.6 kPa, OM-3: 32.7 kPa, OM-4: 30.1 kPa and was increasing with assembly time on average (2.4-fold. The screening of the different collagen formulations revealed a substance with significant

  12. A method to screen and evaluate tissue adhesives for joint repair applications

    Science.gov (United States)

    2012-01-01

    Background Tissue adhesives are useful means for various medical procedures. Since varying requirements cause that a single adhesive cannot meet all needs, bond strength testing remains one of the key applications used to screen for new products and study the influence of experimental variables. This study was conducted to develop an easy to use method to screen and evaluate tissue adhesives for tissue engineering applications. Method Tissue grips were designed to facilitate the reproducible production of substrate tissue and adhesive strength measurements in universal testing machines. Porcine femoral condyles were used to generate osteochondral test tissue cylinders (substrates) of different shapes. Viability of substrates was tested using PI/FDA staining. Self-bonding properties were determined to examine reusability of substrates (n = 3). Serial measurements (n = 5) in different operation modes (OM) were performed to analyze the bonding strength of tissue adhesives in bone (OM-1) and cartilage tissue either in isolation (OM-2) or under specific requirements in joint repair such as filling cartilage defects with clinical applied fibrin/PLGA-cell-transplants (OM-3) or tissues (OM-4). The efficiency of the method was determined on the basis of adhesive properties of fibrin glue for different assembly times (30 s, 60 s). Seven randomly generated collagen formulations were analyzed to examine the potential of method to identify new tissue adhesives. Results Viability analysis of test tissue cylinders revealed vital cells (>80%) in cartilage components even 48 h post preparation. Reuse (n = 10) of test substrate did not significantly change adhesive characteristics. Adhesive strength of fibrin varied in different test settings (OM-1: 7.1 kPa, OM-2: 2.6 kPa, OM-3: 32.7 kPa, OM-4: 30.1 kPa) and was increasing with assembly time on average (2.4-fold). The screening of the different collagen formulations revealed a substance with significant higher adhesive

  13. Evaluation of chondrocalcinosis and associated knee joint degeneration using MR imaging: Data from the osteoarthritis initiative

    Energy Technology Data Exchange (ETDEWEB)

    Gersing, Alexandra S.; Schwaiger, Benedikt J.; Heilmeier, Ursula; Joseph, Gabby B.; Facchetti, Luca; Kretzschmar, Martin; Steinbach, Lynne S.; Link, Thomas M. [University of California, San Francisco, Department of Radiology and Biomedical Imaging, San Francisco, CA (United States); Lynch, John A.; McCulloch, Charles E.; Nevitt, Michael C. [University of California, San Francisco, Department of Epidemiology and Biostatistics, San Francisco, CA (United States)

    2017-06-15

    To evaluate the ability of different MRI sequences to detect chondrocalcinosis within knee cartilage and menisci, and to analyze the association with joint degeneration. Subjects with radiographic knee chondrocalcinosis (n = 90, age 67.7 ± 7.3 years, 50 women) were selected from the Osteoarthritis Initiative and matched to controls without radiographic chondrocalcinosis (n = 90). Visualization of calcium-containing crystals (CaC) was compared between 3D T1-weighted gradient-echo (T1GE), 3D dual echo steady-state (DESS), 2D intermediate-weighted (IW), and proton density (PD)-weighted fast spin-echo (FSE) sequences obtained with 3T MRI and correlated with a semiquantitative CaC score obtained from radiographs. Structural abnormalities were assessed using Whole-Organ MRI Score (WORMS) and logistic regression models were used to compare cartilage compartments with and without CaC. Correlations between CaC counts of MRI sequences and degree of radiographic calcifications were highest for GE (r{sub T1GE} = 0.73, P < 0.001; r{sub DESS} = 0.68, P < 0.001) compared to other sequences (P > 0.05). Meniscus WORMS was significantly higher in subjects with chondrocalcinosis compared to controls (P = 0.005). Cartilage defects were significantly more frequent in compartments with CaC than without (patella: P = 0.006; lateral tibia: P < 0.001; lateral femur condyle: P = 0.017). Gradient-echo sequences were most useful for the detection of chondrocalcinosis and presence of CaC was associated with higher prevalence of cartilage and meniscal damage. (orig.)

  14. Joint Evaluation of EM Signals Detected Around the Time of Major Earthquakes

    Science.gov (United States)

    Ouzounov, D.; Pulinets, S.; Ciraolo, L.; Cervone, G.; Kafatos, M.; Parrot, M.; Taylor, P.

    2007-12-01

    We present results from our studies of atmospheric and ionospheric electromagnetic (EM) signals preceding major earthquakes. This study examines possible associations relating anomalous changes of thermal and ionospheric parameters observed around the time of several strong earthquakes (M8.0 in Peru and 1999-2005 in California). Our approach requires an integrated analysis of several physical and environmental parameters (thermal infrared electromagnetic fields, latent heat flux, ionospheric parameters, specifically GPS/TEC, DEMETER and electron density, air temperature and humidity of the boundary layer, and seismicity) that have been found to be associated with impending earthquakes. The ionospheric and atmospheric observational methodology we present is based on a joint analysis of: (1) satellite long-wavelength radiation data form NOAA; (2) surface latent heat flux (SLHF); (3) GPS/TEC and DEMETER; and (4) thermal infrared data from (NASA EOS/MODIS) together with ground air temperature and humidity measurements. Our latest understanding from several post-earthquake independent analyses takes into account the problem of proper evaluation of such alarm techniques for upcoming major (M>5.5, depthPeru (08/15/2007) and EM signals found before the major events in California, using the same methodology. We found evidence of the systematic appearance of both atmospheric and ionospheric anomalies preceding most of these major events. Nighttime TIR signals, approximately a week before the earthquakes, corresponded with an increase of SLHF and air temperature; these were followed by significant variations in the ionospheric TEC measurements above the epicenters. Our findings are consistent with the most recent theoretical model of Lithosphere-Atmosphere-Ionosphere coupling between the crust and the atmosphere/ionosphere proposed by Pulinets et al, (2004, 2006)

  15. Long-term evaluation of single-puncture temporomandibular joint arthrocentesis in patients with unilateral temporomandibular disorders.

    Science.gov (United States)

    Şentürk, M F; Yıldırım, D; Bilgir, E; Fındık, Y; Baykul, T

    2018-01-01

    The purpose of this study was to evaluate the long-term effects of the single-puncture arthrocentesis (SPA) technique. Forty-two patients with unilateral temporomandibular joint disorders (TMDs) were treated by SPA. Thirty-eight of these patients completed 1-24 months of follow-up (short-term group) and 21 completed 11 months or longer of follow-up (long-term group). The two groups were evaluated statistically for pain (visual analogue scale), maximum mouth opening, lateral excursion, and protrusion. Both follow-up duration groups showed significant improvements when compared to baseline levels for almost all of the outcome variables (P<0.05). Single puncture temporomandibular joint arthrocentesis is an effective treatment method over both the short and long term. Copyright © 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  16. Magnetic resonance evaluation of temporomandibular joint components in successfully treated cases of closed lock with a stuck disc

    Energy Technology Data Exchange (ETDEWEB)

    Ohnuki, Takayoshi; Fukuda, Masayuki; Seki, Hiroshi; Iino, Mitsuyoshi [Akita Univ. (Japan). School of Medicine; Funaki, Katsuyuki; Takahashi, Tetsu

    2002-02-01

    The purpose of this study was to evaluate morphological changes in temporomandibular joint components by magnetic resonance imaging (MRI, 1.5 Tesla) before and after treatment for closed lock with a stuck disc. A total of 25 joints (25 patients) that were successfully treated and showed marked improvement in range of motion and articular pain after treatment were studied. Each joint was evaluated on the basis of pretreatment and posttreatment MRI findings, including disc mobility, condylar translation, disc reduction, disc shape, degree of disc displacement, bone changes of the condyle, and signal intensity of the posterior disc attachment. Posttreatment MRI revealed that all joints had mobile discs, and the range of the condylar translation had increased. Deformity of the disc and condyle had progressed remarkably. The posterior disc attachment showed low signal intensity. These results suggest that improved disc mobility is indispensable for successful treatment. The results also reveal that the disc, condyle, and posterior attachment showed various changes caused by remodeling. (author)

  17. Accuracy of in vivo palpation-guided acromioclavicular joint injection assessed with contrast material and fluoroscopic evaluations.

    Science.gov (United States)

    Scillia, Anthony; Issa, Kimona; McInerney, Vincent K; Milman, Edward; Baltazar, Romulo; Dasti, Umer; Festa, Anthony

    2015-08-01

    The purpose of this study was to evaluate the accuracy of in vivo acromioclavicular (AC) joint injections without fluoroscopic guidance and assess whether patient demographics affected the accuracy of injections. A consecutive cohort of patients who presented with painful acromioclavicular joints was prospectively evaluated. All patients had clinical and radiographic evidence of AC arthritis, had failed conservative measures, and thus had received intraarticular corticosteroid injections. All injections were performed by experienced fellowship-trained musculoskeletal radiologists and by blinded digital palpation technique. Accuracy of injections was assessed with biplanar fluoroscopic views. Forty-one AC injections in 22 males and 16 females with a mean age of 51 years (range 18 to 78) were identified. Twenty-three injections were in the right shoulder and 18 in the left. Only 15 injections were confirmed to be in the intraarticular AC joint, yielding an accuracy of 36.5%. There were no significant differences in the mean age (54 vs. 52 years; p = 0.58), male-to-female ratio (p = 0.73), and side of the injection between the accurate and inaccurate injections, respectively. Based on the findings of the present study, the authors encourage the use of image guidance for corticosteroid treatment of the AC joint. Level IV Therapeutic Case Series.

  18. Evaluation of skin dose in tomographic radiographs of temporomandibular joint; Avaliacao da dose pele em radiografias tomograficas da articulacao tempromandibular

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, S.B.; Chaves, F.C.; Rocha, F.E.F.C. [Pernambuco Univ., Recife, PE (Brazil). Dept. de Clinica e Odontologia Preventiva; Khoury, H.J. [Pernambuco Univ., Recife, PE (Brazil). Dept. de Energia Nuclear]. E-mail: khoury@elogica.com.br

    2001-07-01

    The aim of this study was to evaluate the skin entrance dose, in patients with temporomandibular joint (TMJ) dysfunctions submitted to computerized tomography. For this purpose, in a private medical establishment, in the city of Recife-Pe/Br, 40 patients were evaluated, in according to radiation doses received in eyes, thyroid and TMJ regions. The value found for eye region range from 0.004 to 0.125 mGy, for thyroid range from 0.002 to 0.113 mGy and for TMJ range from 0.112 to 0.541 mGy.

  19. EVALUATION OF URBAN ATMOSPHERIC TRANSPORT AND DISPERSION MODELS USING DATA FROM THE JOINT URBAN 2003 FIELD EXPERIMENT

    OpenAIRE

    T. Urban, Jeffry; Warner, Steve; Platt, Nathan; F. Heagy, James

    2008-01-01

    Abstract: We have evaluated the performance of several urban atmospheric transport and dispersion models by comparing model predictions to tracer gas concentrations measured during the Joint Urban 2003 field experiment in Oklahoma City, USA. These models include the Urban Canopy, Urban Dispersion Model (UDM), and Micro-SWIFT/SPRAY (MSS) modes within the HPAC modelling suite, QUIC-URB/QUIC-PLUME models, and the MESO/RUSTIC models. We discuss some of the results of these comparisons...

  20. Exemplification of Tomographic Method to Evaluate the Quality of Welded Joints Made from EN 5754-H22 Alloy

    Directory of Open Access Journals (Sweden)

    Błachnio Józef

    2016-12-01

    Full Text Available The quality of welded joints depends on many factors. The relevant standards stipulate technical conditions of welds quality assessment, which provides the basis for stating whether the given joint is compatible with the requirements or whether it is defective. In practice, making welded joints that are totally devoid of defects is extremely difficult. To conduct the control of inner structure of the given joint a non-destructive method with the application of industrial CT scanner might be applied. This modern diagnosing method combines the x-ray examination with advanced computer technology. The basic advantage of computer-assisted tomography consists in examining objects in three dimensions and the possibility to carry out three-dimensional reconstructions. The aim of this article is to discuss the use of this method to evaluate the quality of welded joints made of aluminium alloys. Capabilities of computer-assisted tomography were depicted by the case of weld probes constructed with TIG (ang. Tungsten Inert Gas welding by different process variables. One has made the analysis of the quality of probes showing the smallest and the biggest internal and external welding defects.

  1. Facet joint pain in chronic spinal pain: an evaluation of prevalence and false-positive rate of diagnostic blocks.

    Science.gov (United States)

    Manchukonda, Rajeev; Manchikanti, Kavita N; Cash, Kimberly A; Pampati, Vidyasagar; Manchikanti, Laxmaiah

    2007-10-01

    A retrospective review. Evaluation of the prevalence of facet or zygapophysial joint pain in chronic spinal pain of cervical, thoracic, and lumbar origin by using controlled, comparative local anesthetic blocks and evaluation of false-positive rates of single blocks in the diagnosis of chronic spinal pain of facet joint origin. Facet or zygapophysial joints are clinically important sources of chronic cervical, thoracic, and lumbar spine pain. The previous studies have demonstrated the value and validity of controlled, comparative local anesthetic blocks in the diagnosis of facet joint pain, with a prevalence of 15% to 67% variable in lumbar, thoracic, and cervical regions. False-positive rates of single diagnostic blocks also varied from 17% to 63%. Five hundred consecutive patients receiving controlled, comparative local anesthetic blocks of medial branches for the diagnosis of facet or zygapophysial joint pain were included. Patients were investigated with diagnostic blocks using 0.5 mL of 1% lidocaine per nerve. Patients with lidocaine-positive results were further studied using 0.5 mL of 0.25% bupivacaine per nerve on a separate occasion. Medial branch blocks were performed with intermittent fluoroscopic visualization, at 2 levels to block a single joint. A positive response was considered as one with at least 80% pain relief from a block of at least 2 hours duration when lidocaine was used, and at least 3 hours or longer than the duration of relief with lidocaine when bupivacaine was used, and also the ability to perform prior painful movements. A total of 438 patients met inclusion criteria. The prevalence of facet joint pain was 39% in the cervical spine [95% confidence interval (CI), 32%-45%]; 34% (95% CI, 22%-47%) in the thoracic pain; and 27% (95% CI, 22%-33%) in the lumbar spine. The false-positive rate with a single block in the cervical region was 45%, in the thoracic region was 42%, and in the lumbar region 45%. This retrospective review once again

  2. Optimum conductive fabric sensor sites for evaluating the status of knee joint movements using bio-impedance

    Directory of Open Access Journals (Sweden)

    Kim Jinkwon

    2011-06-01

    Full Text Available Abstract Background There have been many studies that utilize the bio-impedance measurement method to analyze the movements of the upper and lower limbs. A fixed electrical current flows into the limbs through four standard disposable electrodes in this method. The current flows in the muscles and blood vessels, which have relatively low resistivity levels in the human body. This method is used to measure bio-impedance changes following volume changes of muscles and blood vessels around a knee joint. The result of the bio-impedance changes is used to evaluate the movements. However, the method using the standard disposable electrodes has a restriction related to its low bio-impedance changes: the standard disposable electrodes are only able to measure bio-impedance from a limited part of a muscle. Moreover, it is impossible to use continuously, as the electrodes are designed to be disposable. This paper describes a conductive fabric sensor (CFS using a bio-impedance measurement method and determines the optimum configuration of the sensor for estimating knee joint movements. Methods The upper side of subjects' lower limbs was divided into two areas and the lower side of subjects' lower limbs was divided into three areas. The spots were matched and 6 pairs were selected. Subjects were composed of 15 males (age: 30.7 ± 5.3, weight: 69.8 ± 4.2 kg, and height: 173.5 ± 2.8 cm with no known problems with their knee joints. Bio-impedance changes according to knee joint flexion/extension assessments were calculated and compared with bio-impedance changes by an ankle joint flexion/extension test (SNR I and a hip joint flexion/extension test (SNR II. Results The bio-impedance changes of the knee joint flexion/extension assessment were 35.4 ± 20.0 Ω on the (1, 5 pair. SNR I was 3.8 ± 8.4 and SNR II was 6.6 ± 7.9 on the (1, 5 pair. Conclusions The optimum conductive fabric sensor configuration for evaluating knee joint movements were represented by

  3. In Vivo Osteoinduction: Evaluating 2-Beta Coxatene as an Immunoinductive Compound and Novel Ingredient for Joint Support.

    Science.gov (United States)

    Spinks, Katherine; Scaffidi, James J

    2016-10-01

    Osteoarthritis (OA) is a degenerative joint disease characterized by progressive loss of articular cartilage. Many treatments lack the ability to stimulate the growth of native cartilage tissue while they simultaneously increase joint comfort. For the past few decades, dietary supplements have been investigated for the ability to both address joint inflammation and stimulate cartilage tissue. The present study intended to examine the supplement's in vivo osteoinductive capabilities and clinical efficacy for overall joint health. The research team designed a randomized, double-blind, comparative clinical trial. The study took place via telephone interviews. Participants had self-reported OA of a weight-bearing joint (ie, of the knee, hip, spine, or ankle). Patients were recruited using the Health Science Institute, a consumer supplement newsletter. Participants in the intervention group were blindly given 135 mg of 2-Beta Coxatene (2BCT) orally, which contained (1) a custom blend of low-dose Cyplexinol, an osteoinductive protein complex derived from bovine bone tissue, and (2) Boswellia serrata resin enriched to 65% 3- O -Acetyl-11-keto-β-Boswellic acid. A positive control group was blindly given 1500 mg of glucosamine hydrogen chloride and 1200 mg of chondroitin sulfate. Participants took the supplements for 3 mo. A histological evaluation was performed on an athymic rat to test the supplement's in vivo osteoinductive capabilities. A negative control, commercially purchased, unhydrolyzed type 2 collagen was used for that test. Participants were evaluated for parameters of pain and joint function at baseline (day 0) and at days 7, 30, and 90 using the Western Ontario and McMaster Universities (WOMAC) OA index and a visual analogue scale (VAS). The histological evaluation of the athymic rat confirmed that the Cyplexinol component of the 2BCT was positive for de novo bone tissue and collagen synthesis, corroborating osteoinduction. In the clinical trial, the

  4. A Simulation to Evaluate Joint Military Logistics in a Humanitarian Assistance Environment

    Science.gov (United States)

    2012-03-01

    insight on the world of computer simulation. Furthermore, I thank the Center for Operational Analysis support team, for assisting me in getting over...Joint Assesment Team JDDOC Joint Deployment and Distribution Operations Center JFAST Joint Flow and Analysis System for Transportation JP Joint...step in the author’s research effort. Simulation Simulation is the process of designing and creating a computerized model of a real or proposed

  5. Kinematic evaluation of movement smoothness in golf: relationship between the normalized jerk cost of body joints and the clubhead.

    Science.gov (United States)

    Choi, Ahnryul; Joo, Su-Bin; Oh, Euichaul; Mun, Joung Hwan

    2014-02-26

    When the human body is introduced to a new motion or movement, it learns the placement of different body parts, sequential muscle control, and coordination between muscles to achieve necessary positions, and it hones this new skill over time and repetition. Previous studies have demonstrated definite differences in the smoothness of body movements with different levels of training, i.e., amateurs compared with professionals. Therefore, we tested the hypothesis that skilled golfers swing a driver with a smoother motion than do unskilled golfers. In addition, the relationship between the smoothness of body joints and that of the clubhead was evaluated to provide further insight into the mechanism of smooth golf swing. Two subject groups (skilled and unskilled) participated in the experiment. The skilled group comprised 20 male professional golfers registered with the Korea Professional Golf Association, and the unskilled group comprised 19 amateur golfers who enjoy golf as a hobby. Six infrared cameras (VICON460 system) were used to record the 3D trajectories of markers attached to the clubhead and body segments, and the resulting data was evaluated with kinematic analysis. A physical quantity called jerk was calculated to investigate differences in smoothness during downswing between the two study groups. The hypothesis that skilled golfers swing a driver with a smoother motion than do unskilled golfers was supported. The normalized jerk of the clubhead of skilled golfers was lower than that of unskilled golfers in the anterior/posterior, medial/lateral, and proximal/distal directions. Most human joints, especially in the lower body, had statistically significant lower normalized jerk values in the skilled group. In addition, the normalized jerk of the skilled group's lower body joints had a distinct positive correlation with the normalized jerk of the clubhead with r = 0.657 (p joints than that of the upper body joints. These findings can be used to

  6. Cause-related marketing : consumer evaluation of fit between joint nonprofit-forprofit products

    OpenAIRE

    Ringer, Allison Catharina

    2017-01-01

    This dissertation addresses the perception of fit in the context of Cause-related marketing (referred to as CRM). The research seeks to develop an understanding of the perception of fit and investigates the role it plays in the evaluation and support for CRM campaigns. This research aims to address the overarching research problem: How does the congruence of nonprofit-forprofit pairings influence consumers' perceptions of fit and consequently their evaluation and support for CRM c...

  7. Evaluation of a subject-specific finite-element model of the equine metacarpophalangeal joint under physiological load.

    Science.gov (United States)

    Harrison, Simon M; Whitton, R Chris; Kawcak, Chris E; Stover, Susan M; Pandy, Marcus G

    2014-01-03

    The equine metacarpophalangeal (MCP) joint is frequently injured, especially by racehorses in training. Most injuries result from repetitive loading of the subchondral bone and articular cartilage rather than from acute events. The likelihood of injury is multi-factorial but the magnitude of mechanical loading and the number of loading cycles are believed to play an important role. Therefore, an important step in understanding injury is to determine the distribution of load across the articular surface during normal locomotion. A subject-specific finite-element model of the MCP joint was developed (including deformable cartilage, elastic ligaments, muscle forces and rigid representations of bone), evaluated against measurements obtained from cadaver experiments, and then loaded using data from gait experiments. The sensitivity of the model to force inputs, cartilage stiffness, and cartilage geometry was studied. The FE model predicted MCP joint torque and sesamoid bone flexion angles within 5% of experimental measurements. Muscle-tendon forces, joint loads and cartilage stresses all increased as locomotion speed increased from walking to trotting and finally cantering. Perturbations to muscle-tendon forces resulted in small changes in articular cartilage stresses, whereas variations in joint torque, cartilage geometry and stiffness produced much larger effects. Non-subject-specific cartilage geometry changed the magnitude and distribution of pressure and the von Mises stress markedly. The mean and peak cartilage stresses generally increased with an increase in cartilage stiffness. Areas of peak stress correlated qualitatively with sites of common injury, suggesting that further modelling work may elucidate the types of loading that precede joint injury and may assist in the development of techniques for injury mitigation. © 2013 Published by Elsevier Ltd.

  8. Design and evaluation of a quasi-passive knee exoskeleton for investigation of motor adaptation in lower extremity joints.

    Science.gov (United States)

    Shamaei, Kamran; Cenciarini, Massimo; Adams, Albert A; Gregorczyk, Karen N; Schiffman, Jeffrey M; Dollar, Aaron M

    2014-06-01

    In this study, we describe the mechanical design and control scheme of a quasi-passive knee exoskeleton intended to investigate the biomechanical behavior of the knee joint during interaction with externally applied impedances. As the human knee behaves much like a linear spring during the stance phase of normal walking gait, the exoskeleton implements a spring across the knee in the weight acceptance (WA) phase of the gait while allowing free motion throughout the rest of the gait cycle, accomplished via an electromechanical clutch. The stiffness of the device is able to be varied by swapping springs, and the timing of engagement/disengagement changed to accommodate different loading profiles. After describing the design and control, we validate the mechanical performance and reliability of the exoskeleton through cyclic testing on a mechanical knee simulator. We then describe a preliminary experiment on three healthy adults to evaluate the functionality of the device on both left and right legs. The kinetic and kinematic analyses of these subjects show that the exoskeleton assistance can partially/fully replace the function of the knee joint and obtain nearly invariant moment and angle profiles for the hip and ankle joints, and the overall knee joint and exoskeleton complex under the applied moments of the exoskeleton versus the control condition, implying that the subjects undergo a considerable amount of motor adaptation in their lower extremities to the exoskeletal impedances, and encouraging more in-depth future experiments with the device.

  9. Internal derangement of temporomandibular joint: an evaluation of effect of corticosteroid injection compared with injection of sodium hyaluronate after arthrocentesis.

    Science.gov (United States)

    Giraddi, Girish B; Siddaraju, A; Kumar, Bimleshwar; Singh, Chandravir

    2012-09-01

    Internal derangements are the commonest disorders of temporomandibular joint (TMJ). Different treatment modalities including conservative and surgical methods have been proposed to treat the same. Arthrocentesis is gaining popularity in the treatment of internal derangement of TMJ. Being minimally invasive it does not have the demerits of surgical approaches and at the same time is producing better results than conservative approaches. This study evaluates and compares corticosteroid and sodium hyaluronate after arthrocentesis in the treatment of internal derangement of TMJ. Sixteen patients with internal derangement were randomly selected and divided into 2 groups (8 in each group). Arthrocentesis of the upper joint space was then performed using Ringer lactate under local anaesthesia followed by injection of either betamethasone or sodium hyaluronate into the joint. Clinical data was collected in the form of pain (visual analog scale), maximum mouth opening, joint sound and deviation before and after treatment up to 6 months. Both groups of patients were benefited from the treatment at the 6 month follow up and there was slightly less intensity of pain in sodium hyaluronate group compared with corticosteroid group. Maximum mouth opening was also increased in both groups. A decrease in clicking and deviation were seen in both groups. There was no statistically significant difference between betamethasone and sodium hyaluronate. Intra articular injection of corticosteroid or sodium hyaluronate after arthrocentesis had considerable effect on the TMJ. Both betamethasone and sodium hyaluronate can be used after arthrocentesis with similar results.

  10. EVALUATION OF THE INTERMETATARSAL ANGLE AFTER THE ARTHRODESIS OF THE FIRST METATARSOPHALANGEAL JOINT FOR TREATMENT OF THE HALLUX VALGUS

    Science.gov (United States)

    Costa, Marco Túlio; Neto, Douglas Lobato Lopes; Kojima, Fábio Henrique; Ferreira, Ricardo Cardenuto

    2015-01-01

    Objective: To evaluate the correction of the intermetatarsal angle after arthrodesis of the metatarsophalangeal joint of the hallux. We believe that varus deformity of the first metatarsal can be corrected after arthrodesis of the first metatarsophalangeal joint, without the need for proximal osteotomy. Methods: Forty-three feet of patients who had undergone arthrodesis of the first metatarsophalangeal joint between May 1997 and October 2009 were retrospectively analyzed by means of radiographs. The mean length of follow-up was 58 months. Measurements on the metatarsophalangeal angle, intermetatarsal angle and sesamoid dislocation were made using radiographs made before, immediately after and later on after the operation. Results: The mean metatarsophalangeal angle was 37.6 degrees preoperatively, 12.8 degrees immediately after the operation and 16.4 degrees later on after the operation. The mean intermetatarsal angle was 16 degrees preoperatively, 10 degrees immediately after the operation and 10.2 degrees later on after the operation. Regarding sesamoid dislocation, preoperative radiographs showed most feet to be classified as G3; immediately after the operation, most were classified as G2; and later on after the operation, most were G1. Conclusion: The intermetatarsal angle and sesamoid dislocation improved with arthrodesis of the first metatarsophalangeal joint, without the need for osteotomy at the base of the first metatarsal. PMID:27042648

  11. A numerical approach for evaluating the stiffness of steel tube–R.C. beam composite joint

    Directory of Open Access Journals (Sweden)

    Hazem M.F. Elbakry

    2014-09-01

    Full Text Available A numerical approach has been developed for the analysis of composite joints of steel tubes embedded in reinforced concrete. This kind of joint is typically found at the foundation of composite columns and in open pile supported wharves. The performance of such joints is thought to have a considerable effect on the overall behaviour and ductility of the structures containing them as indicated by previous experimental and analytical work. The developed approach was based on a two-stage two dimensional analysis to account for the three dimensional nature of the joint behaviour. The validity of the new approach was proven by applying it to previously experimentally tested composite joints. Good agreement was observed between the joint behaviour as produced by the numerical analysis using the new approach and the experimental measurements. Considerable saving in computer run time was also achieved compared to the case of using three dimensional analysis.

  12. Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire (JHEQ): a patient-based evaluation tool for hip-joint disease. The Subcommittee on Hip Disease Evaluation of the Clinical Outcome Committee of the Japanese Orthopaedic Association

    OpenAIRE

    Matsumoto, Tadami; Kaneuji, Ayumi; Ichiseki, Toru; Hiejima, Yoshimitsu; Sugiyama, Hajime; Akiyama, Haruhiko; Atsumi, Takashi; Ishii, Masaji; Izumi, Kiyoko; Ito, Hiroshi; Okawa, Takahiro; Ohzono, Kenji; Otsuka, Hiromi; Kishida, Shunji; Kobayashi, Seneki

    2011-01-01

    Background The Japanese Orthopaedic Association Hip Score is widely used in Japan, but this tool is designed to reflect the viewpoint of health-care providers rather than that of patients. In gauging the effect of medical therapies in addition to clinical results, it is necessary to assess quality of life (QOL) from the viewpoint of patients. However, there is no tool evaluating QOL for Japanese patients with hip-joint disease. Methods With the aim of more accurately classifying QOL for Japan...

  13. Three-Point Dixon Chemical-Shift Imaging for Evaluating Articular Cartilage Defects in the Knee Joint on a Low-Field-Strength Open Magnet

    National Research Council Canada - National Science Library

    Bredella, M. A; Losasso, C; Moelleken, S. C; Huegli, R. W; Genant, H. K; Tirman, P. F. J

    2001-01-01

    .... OBJECTIVE. The purpose of our study was to assess the value of a modified three-point Dixon MR technique for evaluating articular cartilage defects in the knee joint on a low-field-strength open magnet...

  14. Evaluation of RSA set-up from a clinical biplane fluoroscopy system for 3D joint kinematic analysis.

    Science.gov (United States)

    Bonanzinga, Tommaso; Signorelli, Cecilia; Bontempi, Marco; Russo, Alessandro; Zaffagnini, Stefano; Marcacci, Maurilio; Bragonzoni, Laura

    2016-01-01

    dinamic roentgen stereophotogrammetric analysis (RSA), a technique currently based only on customized radiographic equipment, has been shown to be a very accurate method for detecting three-dimensional (3D) joint motion. The aim of the present work was to evaluate the applicability of an innovative RSA set-up for in vivo knee kinematic analysis, using a biplane fluoroscopic image system. To this end, the Authors describe the set-up as well as a possible protocol for clinical knee joint evaluation. The accuracy of the kinematic measurements is assessed. the Authors evaluated the accuracy of 3D kinematic analysis of the knee in a new RSA set-up, based on a commercial biplane fluoroscopy system integrated into the clinical environment. The study was organized in three main phases: an in vitro test under static conditions, an in vitro test under dynamic conditions reproducing a flexion-extension range of motion (ROM), and an in vivo analysis of the flexion-extension ROM. For each test, the following were calculated, as an indication of the tracking accuracy: mean, minimum, maximum values and standard deviation of the error of rigid body fitting. in terms of rigid body fitting, in vivo test errors were found to be 0.10±0.05 mm. Phantom tests in static and kinematic conditions showed precision levels, for translations and rotations, of below 0.1 mm/0.2° and below 0.5 mm/0.3° respectively for all directions. the results of this study suggest that kinematic RSA can be successfully performed using a standard clinical biplane fluoroscopy system for the acquisition of slow movements of the lower limb. a kinematic RSA set-up using a clinical biplane fluoroscopy system is potentially applicable and provides a useful method for obtaining better characterization of joint biomechanics.

  15. Longitudinal Analysis of Somatic Cell Count for Joint Genetic Evaluation of Mastitis and Recovery Liability

    DEFF Research Database (Denmark)

    Welderufael, Berihu Gebremedhin; de Koning, D J; Janss, Luc

    Abstract Text: Better models of genetic evaluation for mastitis can be developed through longitudinal analysis of somatic cell count (SCC) which usually is used as a proxy for mastitis. Mastitis and recovery data with weekly observations of SCC were simulated for daughter groups of 60 and 240 per...

  16. Applying the Joint Committee's Evaluation Standards for the Assessment of Alternative Testing Methods.

    Science.gov (United States)

    Nevo, David; Shohamy, Elana

    This study is based on three sources: (1) an experimental try-out of four oral proficiency testing methods (oral interview, role play, reporting test, and group discussion); (2) an evaluation of the testing methods by a panel of experts; and (3) an analysis of the same testing methods by policy makers. The findings are reported in terms of the…

  17. Joint Intelligence Operations Center (JIOC) Baseline Business Process Model & Capabilities Evaluation Methodology

    Science.gov (United States)

    2012-03-01

    Targeting Review Board OPLAN Operations Plan OPORD Operations Order OPSIT Operational Situation OSINT Open Source Intelligence OV...Analysis Evaluate FLTREPs MISREPs Unit Assign Assets Feedback Asset Shortfalls Multi-Int Collection Political & Embasy Law Enforcement HUMINT OSINT ...Embassy Information OSINT Manage Theater HUMINT Law Enforcement Collection Sort Requests Platform Information Agency Information M-I Collect

  18. Sonographic evaluation of hip joint effusion in osteoarthritis with correlation to radiographic findings.

    Science.gov (United States)

    Birn, Jeff; Pruente, Ryan; Avram, Raluca; Eyler, William; Mahan, Meredith; van Holsbeeck, Marnix

    2014-05-01

    Hip joint effusion is expected in rapidly destructive osteoarthritis, a diagnosis often only made retrospectively at the end stage of the disease. This study assesses whether the presence of an effusion identified during routine ultrasound-guided hip injection may suggest a more aggressive process such as rapidly destructive osteoarthritis. After the observation of 10 index cases of rapidly destructive osteoarthritis in patients who presented with a joint effusion on ultrasound, we retrospectively reviewed 94 hips from 89 patients who underwent ultrasound-guided hip injection for pain. Preinjection longitudinal ultrasound images of the anterior capsule adjacent to the femoral neck and inferior to the femoral head were reviewed to determine if a joint effusion was present and the size of the effusion if one was there. Comparison of effusion size was then made between those hips that had a clinical and radiographic diagnosis of osteoarthritis and those who had rapidly destructive osteoarthritis by comparing the severity of joint effusion, if one was present. Patients with rapidly destructive osteoarthritis were more likely to have a large joint effusion 60% (3/5) than were those with osteoarthritis 6.7% (6/89) (p = 0.013). Large joint effusions identified sonographically correlate well with radiographic findings of rapidly destructive osteoarthritis. Given rapid onset and severity of the disease, when a large joint effusion is identified on routine hip intervention, patients should be forewarned of the potential for this disease process. Copyright © 2013 Wiley Periodicals, Inc.

  19. A pendulum test as a tool to evaluate viscous friction parameters in the equine fetlock joint.

    Science.gov (United States)

    Noble, Prisca; Lumay, Geoffroy; Coninx, Marc; Collin, Bernard; Magnée, Adrien; Lecomte-Beckers, Jacqueline; Denoix, Jean M; Serteyn, Didier

    2011-05-01

    An equine fetlock joint pendulum test was studied and the influence of post mortem time and intra-articular lipid solvent on the viscous frictional response examined. Fresh equine digits (group 1, n=6 controls; group 2, n=6 lipid solvent) were mounted on a pendulum tribometer. Assuming that pendular joint damping could be modelled by a harmonic oscillator fluid damping (HOFD), damping time (τ), viscous damping coefficient (c) and friction coefficient (μ) were monitored for 5h under experimental conditions (400N; 20°C). In all experiments, pendular joint damping was found to follow an exponential decay function (R(2)=0.99714), which confirmed that joint damping was fluid. The evolution of τ, c and μ was found to be significantly (Plubricating ability was compromised. This equine pendulum test could be used to test the efficacy of various bio-lubricant treatments. Copyright © 2010 Elsevier Ltd. All rights reserved.

  20. Damage state evaluation of adhesive composite joints using chaotic ultrasonic waves

    Science.gov (United States)

    Fasel, Timothy R.; Todd, Michael D.; Park, Gyuhae

    2009-03-01

    Ultrasonic chaotic excitations combined with sensor prediction algorithms have shown the ability to identify incipient damage (loss of preload) in a bolted joint. In this study we examine the capability of this damage detection scheme to identify disbonds and poorly cured bonds in a composite-to-composite adhesive joint. The test structure consists of a carbon fiber reinforced polymer (CFRP) plate that has been bonded to a CFRP rectangular tube/spar with several sizes of disbond as well as a poorly cured section. Each excitation signal is imparted to the CFRP plate through a macro-fiber composite (MFC) patch on one side of the adhesive joint and sensed using an equivalent MFC patch on the opposite side of the joint. A novel statistical classification feature is developed from information theory concepts of cross-prediction and interdependence. Temperature dependence of this newly developed feature will also be examined.

  1. A pendulum test as a tool to evaluate viscous friction parameters in the equine fetlock joint

    OpenAIRE

    Noble, Prisca; Lumay, Geoffroy; Coninx, Marc; Collin, Bernard; Magnée, Adrien; LECOMTE-BECKERS, Jacqueline; Denoix; Serteyn, Didier

    2011-01-01

    An equine fetlock joint pendulum test was studied and the influence of post mortem time and intra-articular lipid solvent on the viscous frictional response examined. Fresh equine digits (group 1, n=6 controls; group 2, n=6 lipid solvent) were mounted on a pendulum tribometer. Assuming that pendular joint damping could be modelled by a harmonic oscillator fluid damping (HOFD), damping time (τ), viscous damping coefficient (c) and friction coefficient (μ) were monitored for 5h under experiment...

  2. Developing Indicators for Monitoring and Evaluating Joint Management Effectiveness in Protected Areas in the Northern Territory, Australia

    Directory of Open Access Journals (Sweden)

    Arturo Izurieta

    2011-09-01

    We consider the effectiveness of a participatory process within the context of the relationships, capacities, skills, communication, and cross-cultural information sharing. We found that at the early stages of joint management, the partners mostly identify process indicators related to human and social capital assets. Cross-cultural engagement in the early stages of the monitoring and evaluation cycle is challenged by issues relating to communication, institutional and community capacities, representation, and flexibility in ways of working together while learning by doing. We conclude, however, that a participatory monitoring and evaluation approach in which partners agree equally on the identification of criteria and indicators to measure agreed management outcomes has the potential of improving equitable participation, decision making and working relationships, which in turn will lead to improved park management effectiveness and community outcomes.

  3. Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position

    OpenAIRE

    MERIGUE,Luciana Fonseca; CONTI, Ana Cláudia de Castro Ferreira; Oltramari-Navarro,Paula Vanessa Pedron; Navarro,Ricardo de Lima; Almeida,Marcio Rodrigues de

    2016-01-01

    Abstract The aim of this study was to investigate condyle concentricity and morphology, and their association with Class I and II malocclusions (Angle). The sample consisted of 49 individuals of both genders, between 11 and 35 years old, divided into two groups, G1: 26 patients with Class I malocclusion, and G2: 23 patients with Class II malocclusion, selected for orthodontic treatment. Evaluation of the condyle morphology and position was performed by the same previously calibrated examiner ...

  4. EVALUATION OF COURSE EVALUATIONS

    DEFF Research Database (Denmark)

    Friis-Hansen, Peter; Houbak, Niels; Klit, Peder

    2005-01-01

    A general evaluation of any education shall be based on the educations ability to meet defined goals and objectives. If such an evaluation is performed continuously it can be viewed as a relative quality measure. A main task when evaluating the whole education will be an evaluation...... of the individual courses. This may comprise of several parts: A lecturer evaluation/report, a student evaluation/report of the course and the teacher(s), the number of students having passed the course, the grade average and the distribution of the grades. At DTU (The Technical University of Denmark), students...... have for more than 10 years been evaluating the courses they attend. During the last 5 years, this evaluation has been electronic as an integral part of our CampusNet computing and course admini¬stra¬tion system. At the MEK department we have a committee in charge of our educational activities. One...

  5. Student perspectives on the development and evaluation of a joint international education to promote employability in Europe.

    Science.gov (United States)

    Craig, Claire; Piškur, Barbara

    2012-01-01

    This article presents a student evaluation of a joint international education developed as part of a European project which sought to equip health care practitioners with the skills to support employability of individuals furthest removed from the labour market, disadvantaged on account of age, gender, migration or ethnicity. Thirty eight students out of the forty one students that participated in the pilot of four modules (NL, UK, SE, DE) returned completed digital questionnaires (92.6% response rate). The study is descriptive by nature. A questionnaire was used to collect the data from students. Additionally students attending the module in the UK also took part in a series of qualitative interviews which sought to explore their experiences in more detail. These were recorded, transcribed and analyzed. Students reported that joint education facilitates competence development. The competencies they identified (Information Communications Technology) were recognised as being key to enhancing employability of disadvantaged groups. The joint international education exemplified by EEE4all offers one model of how to build a responsive international curriculum to ensure that the workforce of the future is well placed to meet the needs of this changing world.

  6. Sonographic assessment of healthy peripheral joints: evaluation according to demographic parameters.

    Science.gov (United States)

    Machado, Flavia S; Natour, Jamil; Takahashi, Rogerio D; de Buosi, Ana Leticia P; Furtado, Rita N V

    2014-12-01

    To describe quantitative and semiquantitative sonographic joint measurements in healthy adults and compare them with demographic parameters. A cross-sectional study was conducted. Bilateral sonographic measurements of small, medium, and large joints were performed in 130 healthy volunteers, stratified into 5 age groups (A, 18-29; B, 30-39; C, 40-49; D, 50-59; and E, 60-80 years). Quantitative synovial hypertrophy measurements and semiquantitative synovial hypertrophy, power Doppler, bone erosion (score 0-3), and articular cartilage (score 0-4) measurements were performed by a blinded radiologist using a 6-18-MHz linear array transducer. The sonographic measurements were correlated with demographic parameters. The significant P value was set at .05. A total of 6500 joint recesses were studied; the mean age ± SD of the participants was 44.8 ± 14.6 years, and 76.9% were women. The highest quantitative synovial hypertrophy values were found in the hip (6.4 mm) and talonavicular joint (2.6 mm). The joint recesses with a greater frequency of hypothetical pathologic semiquantitative scores were second metatarsophalangeal (78.8%) and first metatarsophalangeal (69.3%) for synovial hypertrophy, radiocarpal (17.7%) and first metatarsophalangeal (15.8%) for power Doppler, and posterior glenohumeral (23.1%) and ulnocarpal (4.2%) for bone erosion. The highest quantitative synovial hypertrophy values and the lowest semiquantitative synovial hypertrophy, power Doppler, bone erosion, and articular cartilage scores were observed in age group E (P joint recesses studied. Sonographic changes in healthy peripheral joints were observed predominantly in the oldest group. © 2013 by the American Institute of Ultrasound in Medicine.

  7. Evaluation, Not Development Evaluation

    Science.gov (United States)

    Carden, Fred

    2013-01-01

    Much has been said in literature about the changing face of development and the changing face of the aid industry. However, the focus of this article is the effect that this could have on evaluation and what might be done to move evaluation into the most useful space possible. Herein, the author makes the case that the evaluation community needs…

  8. The Transmission of Lamb Waves Across Adhesively Bonded lap Joints to Evaluate Interfacial Adhesive Properties

    Science.gov (United States)

    Siryabe, Emmanuel; Renier, Mathieu; Meziane, Anissa; Castaings, Michel

    The present work attempts to infer mechanical interfacial properties for lap joint like structures, using Lamb wave modes. A pair of air-coupled, ultrasonic transducers is used to generate and detect a desired Lamb mode. The Lamb waves are launched from one plate and propagate towards the other plate, via the joint. Signals are picked up by the receiving transducer, before and past the joint, and post-processed to obtain the experimental transmission coefficient versus frequency. In addition, a two-dimensional Finite Element-based model is developed and used to compare predicted transmission coefficients with experimental results. The FE model simulates the excitation produced by the transmittertakes into account the viscoelastic properties of the adhesive layer and distributions of longitudinal (kL) and shear (kT) springs at both interfaces between the adhesive and the substrates. Temporal responses of the receiving transducer are predicted before and past the joints, as well as the transmission coefficient versus frequency. This paper discusses preliminary results for aluminium substrates. Values for both kLand kTare optimized so that best fit is obtained between numerical and experimental transmission coefficients. These results demonstrate the potential of Lamb waves to infer mechanical properties at interfaces in adhesively bonded joints.

  9. Bioleach: a mathematical model for the joint evaluation of leachate and biogas production in urban solid waste landfills

    Science.gov (United States)

    Rodrigo-Clavero, Maria-Elena; Rodrigo-Ilarri, Javier

    2017-04-01

    One of the most serious environmental problems in modern societies is the management and disposal of urban solid waste (MSW). Despite the efforts of the administration to promote recycling and reuse policies and energy recovery technologies, nowadays the majority of MSW still is disposed in sanitary landfills. During the phases of operation and post-closure maintenance of any solid waste disposal site, two of the most relevant problems are the production of leachate and the generation of biogas. The leachate and biogas production formation processes occur simultaneously over time and are coupled together through the consumption and/or production of water. However, no mathematical models have been easily identified that allow to the evaluation of the joint production of leachate and biogas, during the operational and the post-closure phase of an urban waste landfill. This paper introduces BIOLEACH, a new mathematical model programmed on a monthly scale, that evaluates the joint production of leachate and biogas applying water balance techniques and considers the management of the landfill as a bioreactor. The application of such a model on real landfills allows to perform an environmentally sustainable management that minimizes the environmental impacts produced being also economically more profitable.

  10. [Clinical evaluation of the hip joint after implantation of cementless Mittelmeier type and Parhofer-Mönch type hip prosthesis].

    Science.gov (United States)

    Grzegorzewski, A; Synder, M; Witoński, D

    2000-01-01

    Total hip replacement is the most common procedure in the treatment of severe degenerative changes in the hip joint. The authors present clinical evaluation of 129 patients (151 hips) who underwent total hip replacement using either the Mittelmeier type or the Parhofer-Mönch type hip prothesis. The age of the patients ranged at the time of the operation between 17 and 74 years (average 44.9). The follow-up ranged from 24 to 143 months (average 61.2 months). The P-M prothesis was implanted in 53 hips, the P-M "Plasmapore" prothesis in 42 patients, Mittelmeier Autophor 900 prothesis in 49 patients and the Mittelmeier Autophor 900S prothesis in 7 patients. Clinical evaluation was performed according to the d'Aubigne-Postel method with the Charnley modification. The results were graded as very good in 17 cases, good in 64 cases, satisfactory in 53 cases and poor in 17 cases. Very good and good results were mainly observed after implantation of the P-M type prothesis and P-M "Plasmapore" type prothesis. Worse results were observed in patients, who at the time of the operation were aged 45 years or less and who had congenital hip dysplasia. P-M type prothesis gives better clinical results in the treatment of degenerative changes of the hip joint.

  11. Evaluation method of adhesive joint strength based on the normal–shear stress of adhesive interface and its application in engineering

    Directory of Open Access Journals (Sweden)

    Na Jingxin

    2015-05-01

    Full Text Available Traditional material-joining techniques are facing enormous challenges due to the wide use of new materials in engineering. Therefore, the application of bonding technique in engineering becomes more and more important. In order to facilitate designers evaluating the joint strength of bonding structure, a fast and simple strength evaluation method which can be easily used for adhesive joints under complex working conditions was proposed in this article. The normal and shear stresses of the adhesive interface were selected as the main research objects in the method considering the complex working conditions that many bonding structures may face in engineering. Butt joint, single lap joint, and several groups of scarf joint specimens with different adhesive angles were fabricated. Numerous repetitive tensile tests were conducted to obtain the adhesive failure stresses under different conditions. The adhesive failure stress envelope was fitted based on the experimental data, and the evaluation method of adhesive joint strength was developed in detail. Finally, verification experiments were designed. The results indicate that the evaluation method of adhesive joint strength based on the normal–shear stress of the adhesive interface is simple and effective in engineering application.

  12. Detailed investigation of the analysis conditions in the evaluation of bonded joints by cohesive zone models

    Science.gov (United States)

    Rocha, R. J. B.; Campilho, R. D. S. G.

    2017-05-01

    Cohesive Zone Models (CZM) are widely used for the strength prediction of adhesive joints. This work studies the influence of different conditions used in CZM simulations to model a thin adhesive layer in single-lap joints (SLJ) under a tensile loading, for an estimation of their influence on the strength prediction under diverse geometrical and material conditions. Adhesives ranging from brittle to highly ductile and overlap lengths (LO) between 12.5 and 50 mm were considered. Several damage initiation and growth criteria were tested. The analysis carried out in this work allowed to conclude that CZM is a powerful technique for strength prediction of bonded joints, provided that the modelling conditions are properly defined.

  13. Experimental and numerical evaluation of the fatigue behaviour in a welded joint

    Science.gov (United States)

    Almaguer, P.; Estrada, R.

    2014-07-01

    Welded joints are an important part in structures. For this reason, it is always necessary to know the behaviour of them under cyclic loads. In this paper a S - N curve of a butt welded joint of the AISI 1015 steel and Cuban manufacturing E6013 electrode is showed. Fatigue tests were made in an universal testing machine MTS810. The stress ratio used in the test was 0,1. Flaws in the fatigue specimens were characterized by means of optical and scanning electron microscopy. SolidWorks 2013 software was used to modeling the specimens geometry, while to simulate the fatigue behaviour Simulation was used. The joint fatigue limit is 178 MPa, and a cut point at 2 039 093 cycles. Some points of the simulations are inside of the 95% confidence band.

  14. Application of optical coherence tomography enhances reproducibility of arthroscopic evaluation of equine joints

    NARCIS (Netherlands)

    Niemelä, Tytti; Virén, Tuomas; Liukkonen, Jukka; te Moller, Nikae; Puhakka, Pia H.; Jurvelin, Jukka S.; Tulamo, R.M.; Töyräs, Juha

    2014-01-01

    Background: Arthroscopy is widely used in various equine joints for diagnostic and surgical purposes. However, accuracy of defining the extent of cartilage lesions and reproducibility in grading of lesions are not optimal. Therefore, there is a need for new, more quantitative arthroscopic methods.

  15. Digital goniometric measurement of knee joint motion. Evaluation of usefulness for research settings and clinical practice.

    Science.gov (United States)

    Cleffken, Berry; van Breukelen, Gerard; Brink, Peter; van Mameren, Henk; Olde Damink, Steven

    2007-10-01

    An accurate and reproducible measurement method for joint motion is essential for classification of success or failure in therapeutic intervention. Digital goniometry is increasingly used as a method of classification for knee joint excursion. The reliability of goniometry however remains debatable. Aim of the study was to determine both intra- and inter-rater reproducibility in degrees, with an electronic digital inclinometer (EDI 320) for active and passive maximum flexion and active maximum extension of the knee joint and to determine the reproducibility of active and passive range of motion. A classical crossover design, with strict measurement protocol was used. Two raters measured 72 knee motions each, in 42 healthy subjects in four sessions. The smallest detectable difference (SDD) was calculated by using adjusted Bland and Altman plots for each knee excursion. No differences in joint excursions between the sexes were found. Passive maximum flexion showed larger excursions than active maximum flexion with additional higher levels of reproducibility. SDDs for inter-rater comparisons yielded: 0+/-3.9 degrees for active maximum extension, 0+/-7.4 degrees for active maximum flexion, 0+/-6.4 degrees for passive maximum flexion, 0+/-7.6 degrees for AROM and 0+/-5.4 degrees for PROM. Intra-rater SDDs showed increased reproducibility by 0.4-1.9 degrees. We conclude that interpretation of knee joint excursions in clinical settings is with these SDDs. Clinical and statistical differences in research settings within these SDDs are not a true difference but should be attributed to measurement error.

  16. Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position

    Energy Technology Data Exchange (ETDEWEB)

    Merigue, Luciana Fonseca; Oltramari-Navarro, Paula Vanessa Pedron; Alemida, Marcio Rodrigues [Universidade do Norte do Parana (UNOPAR), Londrina, PR (Brazil). Faculdade de Odontologia; Conti, Ana Claudia de Castro Ferreira [Universidade do Sagrado Coracao (USC), Bauru, SP (Brazil). Faculdade de Odontologia; Navarro, Ricardo de Lima, E-mail: accfconti@uol.com.br [Universidade Estadual de Maringa (UEM), Maringa, P (Brazil). Departamento de Odontologia

    2016-06-01

    The aim of this study was to investigate condyle concentricity and morphology, and their association with Class I and II malocclusions (Angle). The sample consisted of 49 individuals of both genders, between 11 and 35 years old, divided into two groups, G1: 26 patients with Class I malocclusion, and G2: 23 patients with Class II malocclusion, selected for orthodontic treatment. Evaluation of the condyle morphology and position was performed by the same previously calibrated examiner using cone-beam computed tomography (CBCT) images of the subjects. The CBCT scans were analyzed by means of a 3D program (Dolphin 11.5, Dolphin Imaging and Management Solutions, Chatsworth, CA, USA), with a 25% level of sensitivity. The images obtained from the coronal slices were employed for the condyle morphology analysis, which classified the condyle form as rounded, as flat or convex, and as triangular or angled. The sagittal slices were used to classify further the condyles as concentric and displaced anteriorly or posteriorly. A clinical examination was also performed, including TMJ and muscle palpation. The kappa test was used to evaluate investigator calibration; the Chi-square and paired t-tests were used for analysis. The convex and anteriorly positioned condyles were found most frequently, regardless of the type of malocclusion. No association was observed between the groups regarding condylar characteristics. (author)

  17. Joint Evaluation of the Wave and Offshore Wind Energy Resources in the Developing Countries

    Directory of Open Access Journals (Sweden)

    Eugen Rusu

    2017-11-01

    Full Text Available The objective of the present work is to assess the global wind and wave resources in the vicinity of some developing countries by evaluating 16-year of data (2001–2016, coming from the European Centre for Medium range Weather Forecast (ECMWF. Until now, not much work has been done to evaluate and use the renewable energy sources from these marine environments. This is because most of the attention was focused on more promising areas, such as the European coasts, which are more advanced in terms of technical and economical aspects. A general perspective of the current energy market from the selected target areas is first presented, indicating at the same time the progresses that have been reported in the field of the renewable energy. Besides the spatial and seasonal variations of the marine resources considered, the results also indicate the energy potential of these coastal environments as well as the performances of some offshore wind turbines, which may operate in these regions.

  18. Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position.

    Science.gov (United States)

    Merigue, Luciana Fonseca; Conti, Ana Cláudia de Castro Ferreira; Oltramari-Navarro, Paula Vanessa Pedron; Navarro, Ricardo de Lima; Almeida, Marcio Rodrigues de

    2016-01-01

    The aim of this study was to investigate condyle concentricity and morphology, and their association with Class I and II malocclusions (Angle). The sample consisted of 49 individuals of both genders, between 11 and 35 years old, divided into two groups, G1: 26 patients with Class I malocclusion, and G2: 23 patients with Class II malocclusion, selected for orthodontic treatment. Evaluation of the condyle morphology and position was performed by the same previously calibrated examiner using cone-beam computed tomography (CBCT) images of the subjects. The CBCT scans were analyzed by means of a 3D program (Dolphin 11.5, Dolphin Imaging & Management Solutions, Chatsworth, CA, USA), with a 25% level of sensitivity. The images obtained from the coronal slices were employed for the condyle morphology analysis, which classified the condyle form as rounded, as flat or convex, and as triangular or angled. The sagittal slices were used to classify further the condyles as concentric and displaced anteriorly or posteriorly. A clinical examination was also performed, including TMJ and muscle palpation. The kappa test was used to evaluate investigator calibration; the Chi-square and paired t-tests were used for analysis. The convex and anteriorly positioned condyles were found most frequently, regardless of the type of malocclusion. No association was observed between the groups regarding condylar characteristics.

  19. Tomographic evaluation of the temporomandibular joint in malocclusion subjects: condylar morphology and position

    Directory of Open Access Journals (Sweden)

    Luciana Fonseca MERIGUE

    2016-01-01

    Full Text Available Abstract The aim of this study was to investigate condyle concentricity and morphology, and their association with Class I and II malocclusions (Angle. The sample consisted of 49 individuals of both genders, between 11 and 35 years old, divided into two groups, G1: 26 patients with Class I malocclusion, and G2: 23 patients with Class II malocclusion, selected for orthodontic treatment. Evaluation of the condyle morphology and position was performed by the same previously calibrated examiner using cone-beam computed tomography (CBCT images of the subjects. The CBCT scans were analyzed by means of a 3D program (Dolphin 11.5, Dolphin Imaging & Management Solutions, Chatsworth, CA, USA, with a 25% level of sensitivity. The images obtained from the coronal slices were employed for the condyle morphology analysis, which classified the condyle form as rounded, as flat or convex, and as triangular or angled. The sagittal slices were used to classify further the condyles as concentric and displaced anteriorly or posteriorly. A clinical examination was also performed, including TMJ and muscle palpation. The kappa test was used to evaluate investigator calibration; the Chi-square and paired t-tests were used for analysis. The convex and anteriorly positioned condyles were found most frequently, regardless of the type of malocclusion. No association was observed between the groups regarding condylar characteristics.

  20. "Efficiency Space" - A Framework for Evaluating Joint Evaporation and Runoff Behavior

    Science.gov (United States)

    Koster, Randal

    2014-01-01

    At the land surface, higher soil moisture levels generally lead to both increased evaporation for a given amount of incoming radiation (increased evaporation efficiency) and increased runoff for a given amount of precipitation (increased runoff efficiency). Evaporation efficiency and runoff efficiency can thus be said to vary with each other, motivating the development of a unique hydroclimatic analysis framework. Using a simple water balance model fitted, in different experiments, with a wide variety of functional forms for evaporation and runoff efficiency, we transform net radiation and precipitation fields into fields of streamflow that can be directly evaluated against observations. The optimal combination of the functional forms the combination that produces the most skillful stream-flow simulations provides an indication for how evaporation and runoff efficiencies vary with each other in nature, a relationship that can be said to define the overall character of land surface hydrological processes, at least to first order. The inferred optimal relationship is represented herein as a curve in efficiency space and should be valuable for the evaluation and development of GCM-based land surface models, which by this measure are often found to be suboptimal.

  1. [Clinical and radiographic evaluation of open reduction and internal fixation with headless compression screws in treatment of lisfranc joint injuries].

    Science.gov (United States)

    Zhang, Hui; Min, Li; Wang, Guanglin; Liu, Lei; Fang, Yue; Tu, Chongqi

    2013-10-01

    To evaluate the clinical and radiographic outcomes of headless compression screws for Lisfranc joint injuries. A retrospective analysis was made on clinical data of 34 patients (36 feet) with Lisfranc joint injuries who underwent open reduction and internal fixation with headless compression screws between January 2006 and January 2012. There were 22 males (24 feet) and 12 females (12 feet), aged 21-73 years (mean, 38.9 years). The causes of injury included traffic accident in 16 cases (17 feet), falling from height in 11 cases (12 feet), crushing in 5 cases (5 feet), and sports in 2 cases (2 feet). Of them, there were 19 cases (20 feet) of closed injury and 15 cases (16 feet) of open injury; there were 7 cases (8 feet) of pure dislocations of tarsometatarsal joints and ligamentous Lisfranc injuries (LD), 22 cases (23 feet) of Lisfranc joint fracture dislocations (LFD), 5 cases (5 feet) of combined Chopart-LFD (CLFD). According to Myerson classification, 5 cases (5 feet) were rated as type A, 7 cases (8 feet) as type B1, 14 cases (15 feet) as type B2, 5 cases (5 feet) as type C1, and 3 cases (3 feet) as type C2. Associated fractures included 12 cases (13 feet) of metatarsal shaft fracture, 4 cases (4 feet) of cuboid fracture, 4 cases (4 feet) of navicular bone fracture, 6 cases (7 feet) of coneiform bone fracture/dislocation, 8 cases (10 feet) of ipsilateral lower limb multiple fracture, and 4 cases (4 feet) of contralateral lower limb multiple fracture. The clinical outcomes were evaluated according to American Orthopaedic Foot and Ankle Society (AOFAS) score and visual analogue scale (VAS) score. Postoperative X-ray films were taken to assess the reduction, internal fixation, and the foot arch height. All patients were followed up 1 year to 5 years and 2 months (mean, 3.5 years). X-ray films showed anatomical reduction in 31 cases (33 feet, 91.7%). At last follow-up, AOFAS score and VAS score averaged 80.6 (range, 60-100) and 2.3 (range, 0-6), respectively; the

  2. Exploring the relationship between costs and quality. Does the joint evaluation of costs and quality alter the rankings of Danish hospital departments?

    DEFF Research Database (Denmark)

    Hvenegaard, Anne; Nielsen Arendt, Jacob; Street, Andrew

    2011-01-01

    OBJECTIVE: The purpose is to evaluate the relationship between costs and quality and to assess whether the joint evaluation of costs and quality affects the ranking of hospital departments relative to comparison based on costs alone. METHODS: Using patient level data for 3,754 patients in six...... vascular departments, we estimate fixed effect models for costs (linear) and quality (logistic). We consider two quality measures; mortality and wound complications. To assess whether the joint evaluation of costs and quality affects the ranking of departments, we construct joint confidence regions...... for each pair of departmental effects for costs and quality using a bootstrap method and rank departments according to their cost-effectiveness ratio. The findings are used to evaluate a theory of a U-shaped cost/quality relationship. RESULTS: The association between cost and quality differs depending...

  3. Variability and similarity of gait as evaluated by joint angles: implications for forensic gait analysis.

    Science.gov (United States)

    Yang, Sylvia X M; Larsen, Peter K; Alkjær, Tine; Simonsen, Erik B; Lynnerup, Niels

    2014-03-01

    Closed-circuit television (CCTV) footage is used in criminal investigations to compare perpetrators with suspects. Usually, incomplete gait cycles are collected, making evidential gait analysis challenging. This study aimed to analyze the discriminatory power of joint angles throughout a gait cycle. Six sets from 12 men were collected. For each man, a variability range VR (mean ± 1SD) of a specific joint angle at a specific time point (a gait cycle was 100 time points) was calculated. In turn, each individual was compared with the 11 others, and whenever 1 of these 11 had a value within this individual’s VR, it counted as positive. By adding the positives throughout the gait cycle, we created simple bar graphs; tall bars indicated a small discriminatory power, short bars indicated a larger one. The highest discriminatory power was at time points 60–80 in the gait cycle. We show how our data can assess gait data from an actual case.

  4. Evaluation of Facet Joint Arthrosis in Stenotic and Normal Lumbar Spines with MRI

    Directory of Open Access Journals (Sweden)

    Ebru Ozan

    2013-10-01

    Full Text Available Aim: To reveal the prevalence of lumbar facet joint arthrosis in normal and stenotic lumbar spines with magnetic resonance imaging. Material and Method: Study group consisted of 30 patients with complaints and findings of lower back pain, neurologic claudicatio and lumbar spinal stenosis detected at L3-4, L4-5 and/or L5-S1 with magnetic resonance imaging (cross section area of the dural sac

  5. Evaluation of Facet Joint Arthrosis in Stenotic and Normal Lumbar Spines with MRI

    OpenAIRE

    Ebru Ozan

    2013-01-01

    Aim: To reveal the prevalence of lumbar facet joint arthrosis in normal and stenotic lumbar spines with magnetic resonance imaging. Material and Method: Study group consisted of 30 patients with complaints and findings of lower back pain, neurologic claudicatio and lumbar spinal stenosis detected at L3-4, L4-5 and/or L5-S1 with magnetic resonance imaging (cross section area of the dural sac

  6. Evaluating the Relationship between Team Performance and Joint Attention with Longitudinal Multivariate Mixed Models

    Science.gov (United States)

    2016-09-23

    2014), who reported a negative relationship between physio-behavioral coupling and task performance in teams playing a cooperative video game ...Annual Meeting, 19-23 September 2016. 14. Previous research indicates that measures of joint attention provide unique insight into team cognition ...linearly over time, starting out comparatively high and decreasing as a function of time on task. Additionally, we found evidence of negative

  7. Development and Evaluation of Wide Clearance Braze Joints in Gamma Prime Alloys.

    Science.gov (United States)

    1982-03-01

    improve their resistance to the hot corrosive gases of the engine. When such parts suffer service damage, it is necessary to clean them prior to braze...sinter metal is mixed with the braze filler metal and that mixture is placed in and on the cra (ck to be repaired. The repair then takes place in a sinele...joints ire likely to be advantageous on surfaces of three types. The; are: newly cast and buffed, surfaces havinc Sttmospheric corrosion product, and

  8. Destructive and non-destructive evaluation methods of interface on F82H HIPed joints

    Energy Technology Data Exchange (ETDEWEB)

    Kishimoto, Hirotatsu, E-mail: hkishi@mmm.muroran-it.ac.jp [OASIS, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Graduate School, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Muramatsu, Yusuke [Graduate School, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Asakura, Yuki [OASIS, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Graduate School, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Endo, Tetsuo [Graduate School, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan); Kohyama, Akira [OASIS, Muroran Institute of Technology, 27-1, Muroran, Hokkaido (Japan)

    2016-11-01

    Highlights: • The first wall of F82H steel will be fabricated by the HIP method. • Inspection techniques need to be developed for the HIPed interface. • Both destructive and non-destructive inspection techniques are introduced. - Abstract: The first walls of F82H steel with built-in cooling channels will be assembled thin plates and rectangular pipes by a HIP method. Silicon oxides form on an interface of HIPed joints during HIPing and result in the lowering of toughness of the HIPed joints. A large issue is investigation method of HIPed interface. The flexibility of specimen size for the investigation will be necessary because of the thin wall of cooling channels. A small specimen destructive test technique which is able to distinguish a base metal and an excellent HIPed joint has been desired, and recent researches find out a torsion test method to solve the issue. Non-destructive test technique is another issue for the inspection of the first wall. An ultrasonic inspection method is a candidate but silicon oxides are too small to produce good flaw echo from oxides, some solutions will be necessary. Present research introduces the current status of development of small specimen destructive test technique and the ultrasonic method for the first wall inspection.

  9. Radiographic Evaluation of Intermetatarsal Angle Correction Following First MTP Joint Arthrodesis for Severe Hallux Valgus.

    Science.gov (United States)

    McKean, R Matthew; Bergin, Patrick F; Watson, Geoffrey; Mehta, Siddhant K; Tarquinio, Thom A

    2016-11-01

    Arthrodesis is a standard operative treatment for symptomatic arthritis of the first metatarsophalangeal (MTP) joint. Patients with degenerative joint disease (DJD), severe hallux valgus, and metatarsus primus varus may also require fusion of the first MTP joint. An important question in the latter group of patients is whether a proximal first metatarsal osteotomy is required, in addition to the first MTP joint fusion. Our hypothesis was that patients with severe hallux valgus and metatarsus primus varus, treated with first MTP joint arthrodesis alone, would have correction of the first-to-second intermetatarsal angle (1-2 IMA) and hallux valgus angle (HVA) to near population norms, without the addition of a proximal first metatarsal osteotomy. Preoperative and postoperative radiographs of 19 feet, in 17 patients, with preoperative IMA greater than 15 were analyzed. Weight-bearing radiographs were divided into pre- and postoperative cohorts. Three independent reviewers measured these radiographs and mean 1-2 IMA and HVA were calculated. Mean follow-up was 10 months. The mean preoperative 1-2 IMA was 19.2 degrees (15.6-24.3). The mean preoperative HVA was 48.5 (36-56.6). The mean postoperative values for 1-2 IMA and HVA were 10.8 and 12.3 degrees, respectively. The mean change in IMA was 8.3 degrees and in the hallux valgus angle was 36.4 degrees. The differences between pre- and postoperative measurement for both angles were statistically significant (P < .001). Seven of 19 (37%) feet were corrected to an IMA of less than 9 degrees (normal), whereas in 15/19 feet the postoperative IMA was 12.3 degrees or less. The postoperative HVA was less than 15 degrees in 15/19 (79%) feet. This pre- and postoperative radiographic analysis of patients with severe bunion deformity demonstrated that HVA and 1-2 IMA were acceptably corrected without the addition of a proximal first metatarsal osteotomy. Level III, retrospective comparative series. © The Author(s) 2016.

  10. Detection of early osteoarthritis in the centrodistal joints of Icelandic horses: Evaluation of radiography and low-field magnetic resonance imaging.

    Science.gov (United States)

    Ley, C J; Björnsdóttir, S; Ekman, S; Boyde, A; Hansson, K

    2016-01-01

    Validated noninvasive detection methods for early osteoarthritis (OA) are required for OA prevention and early intervention treatment strategies. To evaluate radiography and low-field magnetic resonance imaging (MRI) for the detection of early stage OA osteochondral lesions in equine centrodistal joints using microscopy as the reference standard. Prospective imaging of live horses and imaging and microscopy of cadaver tarsal joints. Centrodistal (distal intertarsal) joints of 38 Icelandic research horses aged 27-29 months were radiographed. Horses were subjected to euthanasia approximately 2 months later and cadaver joints examined with low-field MRI. Osteochondral joint specimens were classified as negative or positive for OA using light microscopy histology or scanning electron microscopy. Radiographs and MRIs were evaluated for osteochondral lesions and results compared with microscopy. Forty-two joints were classified OA positive with microscopy. Associations were detected between microscopic OA and the radiography lesion categories; mineralisation front defect (Pradiography and low-field MRI pooled lesion categories, but radiography was often superior when individual lesion categories were compared. Early stage centrodistal joint OA changes may be detected with radiography and low-field MRI. Detection of mineralisation front defects in radiographs may be a useful screening method for detection of early OA in centrodistal joints of young Icelandic horses. © 2015 EVJ Ltd.

  11. Raising heels of hind hooves changes the equine coffin, fetlock and hock joint angle: a kinematic evaluation on the treadmill at walk and trot.

    Science.gov (United States)

    Peham, C; Girtler, D; Kicker, C; Licka, T

    2006-08-01

    Raised heels are commonly recommended for various equine orthopaedic conditions. However, the simultaneous effect of raised heels on the different joint angles of the equine hindlimb throughout the motion cycle has not been previously evaluated. To document the simultaneous effect of raised heels on the joint angles of the equine hindlimb coffin, fetlock and hock joints. Eight sound, adult, Warmblood horses were evaluated barefoot and with a heel wedge of 8 or 16 degrees, walking and trotting on a horizontal treadmill. Markers placed on the dorsal and cranial aspect of the hindlimb were traced using a 3D high speed video system and joint angles calculated. The effects of raising the hindlimb heels by 8 or 16 degrees on the angles of the hindlimb during the stance phase are a reduction of the plantar combined coffin joint and pastern joint angle, a reduction of maximum extension in the fetlock joint, and an increase in maximum hock flexion. The relation between angles did not change significantly during the course of the stance phase in the three measurement situations, with only small differences in time of occurrence of each joint angle maxima and minima. Raising the heels of hind hooves increases flexion of the coffin and hock joints during the stance phases of walk and trot, and a doubling of the angle of the raised heels also doubles the effect on the joint angles investigated. Raised heels reduce the maximum extension of the fetlock joint during the the stance phase at walk and trot. This study provides evidence for the therapeutic use of raised shoes with heels in horses with pain on maximum hock extension, e.g. spavin.

  12. A radiographic stress technique for evaluation of coxofemoral joint laxity in dogs.

    Science.gov (United States)

    Flückiger, M A; Friedrich, G A; Binder, H

    1999-01-01

    To develop a radiographic stress technique to quantify hip joint laxity in dogs. Prospective study on client-owned dogs presented for hip dysplasia screening. 302 nonselected dogs (63 breeds). Dogs were sedated and placed in dorsal recumbency. During pelvic radiography, the femoral heads were displaced manually in a craniodorsal direction. On these stress radiographs, the degree of lateral displacement of the femoral heads was assessed in terms of a subluxation index (SI) and compared with the degree of femoral head subluxation and the severity of hip dysplasia found on conventional extended hindlimb radiographs. The degree of subluxation on stress radiographs was significantly greater than on conventional radiographs. Correlation between the severity of canine hip dysplasia (CHD), graded according to conventional techniques, and the degree of subluxation, induced by radiographic stress technique, was positive (r = .57; Pjoints. Hip joint laxity cannot be quantified precisely on standard position radiographs. The proposed stress technique yields significantly higher degrees of femoral head subluxation than the standard position.

  13. A non-conventional technique for evaluating welded joints based on the electrical conductivity

    Energy Technology Data Exchange (ETDEWEB)

    Santos, T.G.; Sorger, G., E-mail: telmo.santos@fct.unl.pt, E-mail: lgs18243@campus.fct.unl.pt [Universidade Nova de Lisboa, UNIDEMI, Departamento de Engenharia Mecanica e Industrial, Faculdade de Ciencias e Tecnologia, Caparica (Portugal); Vilaca, P., E-mail: pedro.vilaca@aalto.fi [Aalto Univ., Dept. of Engineering Design and Production, School of Engineering, Aalto (Finland); Miranda, R., E-mail: rmiranda@fct.unl.pt [Universidade Nova de Lisboa, UNIDEMI, Departamento de Engenharia Mecanica e Industrial, Faculdade de Ciencias e Tecnologia, Caparica (Portugal)

    2015-01-15

    Recent studies showed that electrical conductivity is a valuable technique to identify the different zones of solid-state welded joints with a good correlation with the microstructure and hardness. This is a relevant result since this technique is fast and, in some cases, non destructive, The concept was applied to other welding processes such as the ones involving fusion to a wide range of materials, For this, a comprehensive study was performed using friction stir welding, tungsten inert gas (TlG) and gas metal arc (MAG) welding processes in either bead on plate or butt joints in: carbon steel, magnesium and titanium, Eddy current nondestructive testing (NDT) was used to measure the electrical conductivity at different depths in transverse sections of the processed materials. The profiles were compared to the hardness profiles in the same sections. As a result, a correlation was observed in most materials welded by solid state and by fusion processes. The variation of the electrical conductivity closely follows that measured in the hardness. Another interesting conclusion is that, even for fusion welding of carbon steels, the technique has potential to complement the hardness measurements and microstructural observations, allowing the identification of the distinct zones of welds in materials commonly used in industry. (author)

  14. Evaluation of Creep Strength of Heterogeneous Welded Joint in HR6W Alloy and Sanicro 25 Steel

    Directory of Open Access Journals (Sweden)

    Zieliński A.

    2017-12-01

    Full Text Available This article presents the results of investigations on HR6W alloy and Sanicro 25 steel and the dissimilar welded joint made of them. The characteristic images of microstructure of the investigated materials in the as-received condition and following the creep test, observed with a scanning electron microscope (SEM, are shown. The X-ray analysis of phase composition of the existing precipitates was carried out. The method for evaluation of creep strength based on abridged creep tests carried out at a temperature higher than the design one is presented. The obtained results do not deviate from the values of creep strength determined in long-term creep tests. The maximum difference in creep strength of the investigated materials is ±20%, which is in compliance with the acceptable scatter band. The methodology presented can be used for verification of creep strength (life time of the material of finished components to be operated under creep conditions.

  15. Evaluation of Joint Performance on High Nitrogen Stainless Steel Which is Expected to Have Higher Allergy Resistance

    Science.gov (United States)

    Nakano, Kouichi

    Austenitic stainless steel, which includes nickel for stabilizing austenitic structure, is used for various purposes, for example, for structural material, corrosion-resistant material, biomaterial etc. Nickel is set as one of the rare metals and economizing on nickel as the natural resources is required. On the other hand, nickel is one of the metals that cause metallic allergy frequently. Therefore, high nitrogen stainless steel, where nitrogen stabilizes austenitic structure instead of nickel, has been developed in Japan and some of the foreign countries for the above reason. When high nitrogen stainless steel is fused and bonded, dissolved nitrogen is released to the atmospheric area, and some of the material properties will change. In this study, we bonded high nitrogen stainless steel by stud welding process, which is able to bond at short time, and we evaluate joint performance. We have got some interesting results from the other tests and examinations.

  16. Performance Evaluation of Waterproofing Membrane Systems Subject to the Concrete Joint Load Behavior of Below-Grade Concrete Structures

    Directory of Open Access Journals (Sweden)

    Jaeyoung Song

    2017-11-01

    Full Text Available Below-grade structures such as parking lots, underground subway tunnels, and basements are growing in scale and reaching deeper below-ground levels. In this type of environment, they become subject to higher water pressure. The concrete material of the structures is exposed to wet conditions for longer periods of time, which makes the proper adhesion of waterproofing membranes difficult. Joint movements from increased structural settlement, thermal expansion/shrinkage, and physical loads from external sources (e.g., vehicles make securing durable waterproofing challenging. While ASTM Guides, Korean Codes, and BS Practice Codes on below-grade waterproofing stress the importance of manufacturer specification for quality control, ensuring high quality waterproofing for the ever-changing scale of construction remains a challenge. This study proposes a new evaluation method and criteria which allow for the selection of waterproofing membranes based on specific performance attributes and workmanship. It subjects six different waterproofing membrane systems (installed on dry and wet surface conditioned mortar slab specimens with an artificial joint to different cyclic movement widths to 300 cycles in water to demonstrate that inadequate material properties and workmanship are key causes for leakages.

  17. Evaluating the introduction of joint crisis plans into routine clinical practice in four community mental health services.

    Science.gov (United States)

    Williams, Theresa M; Smith, Geoffrey P; Lumbus, Anita M

    2014-10-01

    Our aim was to evaluate the implementation of joint crisis planning into routine clinical practice in community mental health services in Western Australia. Four community mental health services, two metropolitan and two country based, were invited to participate in a 1-year pilot program to field test a crisis planning tool and the implementation process with a view to then rolling it out across Western Australia. Training and extensive support was offered to staff at the four sites. Consumers experienced the process as both empowering and therapeutic. Despite acknowledgement of the value of interagency collaboration in the planning process, almost all plans were completed by consumers with their case managers. The most conspicuous finding was the marked difference in the number of completed plans at each site. This study supports previous research findings that joint crisis planning enhances the therapeutic relationship and empowers consumers. Organisational readiness was a major factor in the differential uptake of crisis plans between sites. Our study highlights the critical importance of addressing the context and culture of each individual service in which a new intervention is being introduced as part of the implementation process. © The Royal Australian and New Zealand College of Psychiatrists 2014.

  18. Evaluation of Kinesiophobia and Its Correlations with Pain and Fatigue in Joint Hypermobility Syndrome/Ehlers-Danlos Syndrome Hypermobility Type

    Directory of Open Access Journals (Sweden)

    Claudia Celletti

    2013-01-01

    Full Text Available Ehlers-Danlos syndrome hypermobility type a. k. a. joint hypermobility syndrome (JHS/EDS-HT is a hereditary musculoskeletal disorder associating generalized joint hypermobility with chronic pain. Anecdotal reports suggest a prominent role for kinesiophobia in disease manifestations, but no study has systematically addressed this point. Objective. To investigate the impact of kinesiophobia and its relationship with pain, fatigue, and quality of life in JHS/EDS-HT. Design. Cross-sectional study. Subjects/Patients. 42 patients (40 female and 2 male with JHS/EDS-HT diagnosis following standardized diagnostic criteria were selected. Methods. Disease features were analyzed by means of specific questionnaires and scales evaluating kinesiophobia, pain, fatigue, and quality of life. The relationships among variables were investigated using the Spearman bivariate analysis. Results. Kinesiophobia resulted predominantly in the patients’ sample. The values of kinesiophobia did not correlate with intensity of pain, quality of life, and (or the single component of fatigue. A strong correlation was discovered between kinesiophobia and general severity of fatigue. Conclusions. In JHS/EDS-HT, the onset of pain-avoiding strategies is related to the presence of pain but not to its intensity. The clear-cut correlation between kinesiophobia and severity of fatigue suggests a direct link between musculoskeletal pain and fatigue. In JHS/EDS-HT, the underlying mechanism is likely to be facilitated by primary disease characteristics, including hypotonia.

  19. Ultrasound evaluation of effect of different degree of wrist extension on radial artery dimension at the wrist joint.

    Science.gov (United States)

    Selvaraj, Venkatesh; Buhari, Faiza Sulaiman

    2016-01-01

    Successful arterial cannulation requires wide and patent arterial lumen. A recent study has shown that success rate of radial arterial cannulation at first attempt is more at 45° angle of wrist extension in both young and elderly patients. No study has reasoned whether these high success rates at 45° is because of less compression of the radial artery at this particular angle of wrist extension. Hence, we attempted to study whether the radial artery dimensions changes with increasing angles of wrist extension in young, healthy female volunteers using ultrasound examination. To investigate the effect of increasing angle of wrist extension of 0, 15, 30, 45, 60, and 75° on radial artery dimensions at the level of the wrist joint using ultrasound examination. A prospective single blinded study in volunteers. Sonographic measurements of radial artery dimension at the wrist level were performed in 48 young, healthy female subjects. Height (anteroposterior in mm), width (mediolateral in mm) and depth (skin to artery) were measured at wrist extension of 0, 15, 30, 45, 60, and 75°. The dimensions at each angle are compared with 0° as the control and statistical analysis done. One-way analysis of variance test. No statistically significant change in dimension of the radial artery is observed with increasing angle of wrist extension. Ultrasound evaluation showed that increasing angle of wrist extension does not significantly change the dimensions of radial artery at the wrist joint level in young healthy female volunteers.

  20. Evaluation of kinesiophobia and its correlations with pain and fatigue in joint hypermobility syndrome/Ehlers-Danlos syndrome hypermobility type.

    Science.gov (United States)

    Celletti, Claudia; Castori, Marco; La Torre, Giuseppe; Camerota, Filippo

    2013-01-01

    Ehlers-Danlos syndrome hypermobility type a. k. a. joint hypermobility syndrome (JHS/EDS-HT) is a hereditary musculoskeletal disorder associating generalized joint hypermobility with chronic pain. Anecdotal reports suggest a prominent role for kinesiophobia in disease manifestations, but no study has systematically addressed this point. To investigate the impact of kinesiophobia and its relationship with pain, fatigue, and quality of life in JHS/EDS-HT. Cross-sectional study. 42 patients (40 female and 2 male) with JHS/EDS-HT diagnosis following standardized diagnostic criteria were selected. Disease features were analyzed by means of specific questionnaires and scales evaluating kinesiophobia, pain, fatigue, and quality of life. The relationships among variables were investigated using the Spearman bivariate analysis. Kinesiophobia resulted predominantly in the patients' sample. The values of kinesiophobia did not correlate with intensity of pain, quality of life, and (or) the single component of fatigue. A strong correlation was discovered between kinesiophobia and general severity of fatigue. In JHS/EDS-HT, the onset of pain-avoiding strategies is related to the presence of pain but not to its intensity. The clear-cut correlation between kinesiophobia and severity of fatigue suggests a direct link between musculoskeletal pain and fatigue. In JHS/EDS-HT, the underlying mechanism is likely to be facilitated by primary disease characteristics, including hypotonia.

  1. Evaluation of a bisphosphonate enriched ultra-high molecular weight polyethylene for enhanced total joint replacement bearing surface functionality

    Science.gov (United States)

    Wright-Walker, Cassandra Jane

    Each year in the United States there is an increasing trend of patients receiving total joint replacement (TJR) procedures. Approximately a half million total knee replacements (TKRs) are performed annually in the United States with increasing prevalence attributed to baby-boomers, obesity, older, and younger patients. This trend is also seen for total hip replacements (THRs) as well. The use of ultra high molecular weight polyethylene (UHMWPE) inserts in TJRs results in wear particle-induced osteolysis, which is the predominant cause for prosthesis failure and revision surgery. Sub-micron size particle generation is inevitable despite the numerous efforts in improving this bearing material. Work by others has shown that the use of oral and intravenous systemic bisphosphonates (BP) can significantly minimize periprosthetic osteolysis. However, the systemic delivery and the high solubility of BPs results in a predominant portion of the drug being excreted via the kidney without reaching its target, bone. This doctoral research project is focused on the development and evaluation of a novel method to administer BPs locally using the inherent wear of UHMWPE for possible use as an anti-osteolysis treatment. For new materials to be considered, they must be mechanically and tribologically comparable to the current gold standard, UHMWPE. In order to evaluate this material, mechanical, drug elution and tribological experiments were performed to allow assessment of material properties. Tensile tests showed comparable yield stress and pin-on-disk testing showed comparable wear to standard virgin UHMWPE. Further, drug elution tests have shown that BP was released from the enriched material both in static and dynamic conditions. Additionally, an aggressive 2 million cycle total knee simulator experiment has shown statistically similar wear results for the two materials. Overall, this research has provided the groundwork for further characterization and development of a new

  2. Clinical evaluation of double-contrast computed tomography of the temporomandibular joint

    Energy Technology Data Exchange (ETDEWEB)

    Ohnishi, Masatoshi; Nakayama, Eiji; Ohtuki, Kayoko

    1989-01-01

    Soft tissue pathology should be appreciated in diagnosing temporomandibular joint (TMJ) disease. For this purpose, contrast arthrography is useful and we also have introduced double-contrast arthrotomography of the TMJ. X-ray computed tomography (CT), on the other hand, is well suited to the diagnosis of TMJ disease, because it can clearly delineate both hard and soft tissues. We thus introduce direct sagittal CT of the head with the enhancement of the articular space of the TMJ using negative and positivse contrast media and confirmed that this method is very useful for the diagnosis of TMJ disease. In this paper we principally investigate the suitability of this double-contrast computed tomography of the TMJ. We conclude that double-contrast CT technique is equally or more useful in some cases than single-contrast CT technique in the diagnosis of TMJ disease.

  3. Creep properties and microstructure evaluation of weld joint of the pipe made of P92 steel

    Energy Technology Data Exchange (ETDEWEB)

    Kasl, Josef; Jandova, Dagmar; Chvostova, Eva [SKODA VYZKUM s.r.o., Plzen (Czech Republic); Folkova, Eva [SKODA POWER a.s., Plzen (Czech Republic)

    2010-07-01

    One-side weld joint of W type was prepared from P92 type steel using GTAW and SMAW method. Creep test to the rupture of smooth cross-weld samples has been carried out at temperatures ranging from 575 to 650 C and at stresses from 70 to 240 MPa. Fractographic analysis, hardness measurement and detailed study of submicrostructure have been performed using light, scanning and transmission electron microscopy. Changes of microstructure were correlated with the creep strength. Increase in size of secondary phases and cavities formation were evident after creep tests at temperatures above 575 C. Voids were concentrated in the fine prior austenite grain heat affected zones, where fracture occurred. In addition, a sporadic occurrence of individual cavities was found out in the base material and the weld metal after tests at 625 and 650 C. During creep exposures at temperatures above 600 C Laves phase precipitated. (orig.)

  4. Thermal Fatigue Evaluation of Pb-Free Solder Joints: Results, Lessons Learned, and Future Trends

    Science.gov (United States)

    Coyle, Richard J.; Sweatman, Keith; Arfaei, Babak

    2015-09-01

    Thermal fatigue is a major source of failure of solder joints in surface mount electronic components and it is critically important in high reliability applications such as telecommunication, military, and aeronautics. The electronic packaging industry has seen an increase in the number of Pb-free solder alloy choices beyond the common near-eutectic Sn-Ag-Cu alloys first established as replacements for eutectic SnPb. This paper discusses the results from Pb-free solder joint reliability programs sponsored by two industry consortia. The characteristic life in accelerated thermal cycling is reported for 12 different Pb-free solder alloys and a SnPb control in 9 different accelerated thermal cycling test profiles in terms of the effects of component type, accelerated thermal cycling profile and dwell time. Microstructural analysis on assembled and failed samples was performed to investigate the effect of initial microstructure and its evolution during accelerated thermal cycling test. A significant finding from the study is that the beneficial effect of Ag on accelerated thermal cycling reliability (measured by characteristic lifetime) diminishes as the severity of the accelerated thermal cycling, defined by greater ΔT, higher peak temperature, and longer dwell time increases. The results also indicate that all the Pb-free solders are more reliable in accelerated thermal cycling than the SnPb alloy they have replaced. Suggestions are made for future work, particularly with respect to the continued evolution of alloy development for emerging application requirements and the value of using advanced analytical methods to provide a better understanding of the effect of microstructure and its evolution on accelerated thermal cycling performance.

  5. MRF-based Stochastic Joint Inversion of Hydrological and Geophysical Datasets to Evaluate Aquifer Heterogeneities.

    Science.gov (United States)

    Oware, E. K.

    2016-12-01

    Hydrogeophysical assessment of aquifer parameters typically involve sparse noisy measurements coupled with incomplete understanding of the underlying physical process. Thus, recovering a single deterministic solution in light of the largely uncertain inputs is unrealistic. Stochastic imaging (SI) allows the retrieval of multiple equiprobable outcomes that facilitate probabilistic assessment of aquifer properties in a realistic fashion. Representation of prior models is a key aspect of the formulation of SI frameworks. However, higher-order (HO) statistics for representing complex priors in SI are usually borrowed from training images (TIs), which may bias outcomes if the prior hypotheses are inaccurate. A data-driven HO simulation alternative based on Markov random field (MRF) modeling is presented. Here, the modeling of spatial features is guided by potential (Gibbs) energy (PE) minimization. The estimation of the PE encompasses local neighborhood configuration (LNC) and prior statistical constraints. The lower the estimated PE the higher the likelihood of that particular local structure and vice versa. Hence, the LNC component of the PE estimation is designed to promote the recovery of some desired structures while penalizing the retrieval of patterns that are inconsistent with prior expectation. The statistical structure is adaptively inferred from the joint conditional datasets. The reconstruction proceeds in two-steps with the estimation of the lithological structure of the aquifer followed by the simulation of attributes within the identified lithologies. This two-step approach permits the delineation of physically realistic crisp lithological boundaries. The algorithm is demonstrated with a joint inversion of time-lapse concentration and electrical resistivity measurements, in a hypothetical trinary hydrofacies aquifer characterization problem.

  6. Evaluation of the relationship between the occlusion parameters and symptoms of the temporomandibular joint disorder.

    Science.gov (United States)

    Dzingutė, Agnė; Pileičikienė, Gaivilė; Baltrušaitytė, Aušra; Skirbutis, Gediminas

    2017-01-01

    The aetiology of temporomandibular joint disorders (TMD) is multifactorial, whereas occlusal disharmony is one of the predisposing factors. Researchers still discuss the relation between occlusion and TMD. The study aims to investigate the relation between static occlusal parameters and TMD clinical symptoms using T-Scan II analysis system. The sample consisted of 44 persons divided into the treatment group of 20 TMD patients and the control group of 24 subjects without TMD. The main task of T-Scan II computerized occlusal analysis system was to record every patient's occlusion and estimate static occlusal parameters: centre of occlusal force, asymmetry index of maximum occlusal force and occlusion time. These results were compared between groups, data related to patients' complaints and clinical symptoms. The analysis was carried out using Mann-Whitney U, Kruskal-Wallis and Chi-square tests. Averages of the centre of occlusal force in TMD subjects were 6.55 ± 0.99 mm, in the control group - 5.88 ± 0.69 mm; the asymmetry index of maximum occlusal force averages: 15.90 ± 2.71 and 12.93 ± 1.88; occlusion time: 0.281 ± 0.036 s and 0.236 ± 0.022 s, respectively. There were no statistically significant differences between two groups but they were found in the centre of occlusal force and the asymmetry index in the two groups (p occlusion parameters. Values of the centre of the occlusal force distance and the asymmetry index of occlusal force in TMD patients with pain in the temporomandibular joint (TMJ) were significantly higher than in the control group.

  7. Effect of Surgery First Orthognathic Approach on the Temporomandibular Joint: A Clinical Evaluation.

    Science.gov (United States)

    Pelo, Sandro; Saponaro, Gianmarco; De Angelis, Paolo; Gasparini, Giulio; Garagiola, Umberto; Moro, Alessandro

    2018-01-05

    Correction of severe malocclusions with skeletal discrepancies requires orthodontic treatment in combination with orthognathic surgery. Even though conventional orthognathic surgery (COS) is a common and well-accepted approach its influence on the signs and symptoms of temporomandibular disorders (TMDs) is still debated. Recently with the introduction of surgery first approach, a different timing for the management of dentoskeletal imbalances has been proposed. The present study is aimed at assessing the relationship between surgery first approach and temporomandibular joint (TMJ) disorders. The study sample consisted of 24 patients who were selected to be treated with surgery first approach. Clinical follow-ups after surgery were performed every week for the first month, at 3 months, 6 months, and at 1 year. A radiological follow-up was performed at 1 week and at 1 year after the operation with a panorex and a latero-lateral teleradiograph. To assess the effect of surgery first approach on the TMDs signs and symptoms, a clinical assessment was performed 4 days before surgery (T1), 6 months after surgery (T2), and 1 year postoperatively (T3). The results of the authors' study show that pain assessment revealed a general improvement of this symptom in correspondence to TMJ and masticatory muscles except in the masseter and neck region. Also joint noises, TMJ functioning, migraine, and headache underwent a considerable improvement. Surgery first approach is an innovative orthognathic procedure and, by undergoing surgery first approach, patients with pre-existing TMJ dysfunction may experience a significant improvement or even resolution of the TMDs signs and symptoms.

  8. A Joint Evaluation of the Wind and Wave Energy Resources Close to the Greek Islands

    Directory of Open Access Journals (Sweden)

    Daniel Ganea

    2017-06-01

    Full Text Available The objective of this work is to analyze the wind and wave energy potential in the proximity of the Greek islands. Thus, by evaluating the synergy between wind and waves, a more comprehensive picture of the renewable energy resources in the target area is provided. In this study, two different data sources are considered. The first data set is provided by the European Centre for Medium-Range Weather Forecasts (ECMWF through the ERA-Interim project and covers an 11-year period, while the second data set is Archiving, Validation and Interpretation of Satellite Oceanographic data (AVISO and covers six years of information. Using these data, parameters such as wind speed, significant wave height (SWH and mean wave period (MWP are analyzed. The following marine areas are targeted: Ionian Sea, Aegean Sea, Sea of Crete, Libyan Sea and Levantine Sea, near the coastal environment of the Greek islands. Initially, 26 reference points were considered. For a more detailed analysis, the number of reference points was narrowed down to 10 that were considered more relevant. Since in the island environments the resources are in general rather limited, the proposed work provides some outcomes concerning the wind and wave energy potential and the synergy between these two natural resources in the vicinity of the Greek islands. From the analysis performed, it can be noticed that the most energetic wind conditions are encountered west of Cios Island, followed by the regions east of Tinos and northeast of Crete. In these locations, the annual average values of the wind power density (Pwind are in the range of 286–298.6 W/m2. Regarding the wave power density (Pwave, the most energetic locations can be found in the vicinity of Crete, north, south and southeast of the island. There, the wave energy potential is in the range of 2.88–2.99 kW/m.

  9. Evaluation of the relationship between Orthopedic Foundation for Animals' hip joint scores and PennHIP distraction index values in dogs.

    Science.gov (United States)

    Powers, Michelle Y; Karbe, Georga T; Gregor, Thomas P; McKelvie, Pamela; Culp, William T N; Fordyce, Hilary H; Smith, Gail K

    2010-09-01

    To compare 2 screening methods for detecting evidence of hip dysplasia (Orthopedic Foundation for Animals [OFA] and PennHIP) in dogs. Diagnostic test evaluation study. Animals-439 dogs >or= 24 months of age that received routine hip joint screening from June 1987 through July 2008. Dogs were sedated, and PennHIP radiography was performed (hip joint- extended [HE], compression, and distraction radiographic views). The HE radiographic view was submitted for OFA evaluation. A copy of the HE radiographic view plus the compression and distraction radiographic views were submitted for routine PennHIP evaluation, including quantification of hip joint laxity via the distraction index (DI). 14% (60/439) of dogs had hip joints scored as excellent by OFA standards; however, 52% (31/60) of those had a DI >or= 0.30 (range, 0.14 to 0.61). Eighty-two percent of (183/223) dogs with OFA-rated good hip joints had a DI >or= 0.30 (range, 0.10 to 0.77), and 94% (79/84) of dogs with OFA-rated fair hip joints had a DI >or= 0.30 (range, 0.14 to 0.77). Of all dogs with fair to excellent hip joints by OFA standards, 80% (293/367) had a DI >or= 0.30. All dogs with OFA-rated borderline hip joints or mild, moderate, or severe hip dysplasia had a DI >or= 0.30 (range, 0.30 to 0.83). Dogs judged as phenotypically normal by the OFA harbored clinically important passive hip joint laxity as determined via distraction radiography. Results suggested that OFA scoring of HE radiographs underestimated susceptibility to osteoarthritis in dogs, which may impede progress in reducing or eliminating hip dysplasia through breeding.

  10. Evaluation of the structural changes of the hand joints and the rates of rheumatoid arthritis progression according to ultrasound data

    Directory of Open Access Journals (Sweden)

    Rita Aleksandrovna Osipyants

    2013-01-01

    Full Text Available Objective: to define the significance of ultrasonography (USG in the diagnosis of early destructive changes in the hand joints and the rates of rheumatoid arthritis (RA progression in patients at different ages of disease onset. Subjects and methods. 100 patients with a valid RA diagnosis (American College of Rheumatology (ACR 1987 criteria were examined. They were divided into 2 groups: 1 11 patients with an early RA history of less than 2 years (ERA; 2 35 patients with a RA history of over 2 years (LRA. Hand USG (Voluson-i GE; a 4-13-MHz linear probe; gray scale mode was carried out at baseline and after 6-month follow-up. A sonographic index (US-Er-10 based on the bilateral evaluation of 5 articular areas, such as wrinkles, second-to-third metacarpophalangeal (MCP and second-to-third proximal interphalangeal (PIP joints, was proposed to evaluate the progression of destruction. According to US-Er-10 changes, the rates of development of the destructive process were arbitrarily separated into three categories: 1 slow progression rate; 2 moderate progression rate; 3 a rapidly progressive course. The X-ray parameters of structural progression were estimated at 12-month follow-up, by employing the Sharp method modified by van der Heide (SHS. Results. The USG versus X-ray detection rate of erosions was significantly higher in both ERA and LRA (p < 0.05. The ERA patients who had fallen ill after 55 years of age were found to have more significant baseline and final destructive changes according to a total SHS score (p < 0.05 and US-Er-10 index (p < 0.005 than those with RA onset at a younger age. In the ERA patients in whom US-Er-10 increased by three points or more at 6-month follow-up, the rates of X-ray progression at 12 months were significantly higher than those with less pronounced negative changes in this index (Δ total SHS score of 13.5 [3-23] and 0 [0-0], respectively; p < 0.05. The LRA group displayed no statistically relationships between

  11. Evaluation of the novel ultrasound score for large joints in psoriatic arthritis and ankylosing spondylitis: six month experience in daily clinical practice.

    Science.gov (United States)

    Schäfer, Valentin S; Fleck, Martin; Kellner, Herbert; Strunk, Johannes; Sattler, Horst; Schmidt, Wolfgang A; Ehrenstein, Boris; Backhaus, Marina; Hartung, Wolfgang

    2013-12-19

    To evaluate the utility of the recently introduced SOLAR score (sonography of large joints in Rheumatology), which has been validated in RA patients, in a cohort of patients with Psoriatic Arthritis (PsA) and Ankylosing Spondylitis (AS) presenting with involvement of large peripheral joints. The recently established SOLAR score has been designed to determine the degree of inflammation in the shoulder, the elbow, the hip and the knee joint in patients suffering from RA. Since large joints are frequently involved in PsA and AS, synovitis and synovial vascularity were scored semiquantitatively (grade 0-3) by grey scale (GSUS) and power Doppler ultrasound (PDUS) utilizing the validated scoring system. Each joint was scanned from different angles, the knee joint for example was divided into four areas to score for synovitis: the suprapatellar longitudinal, the medial longitudinal, the lateral longitudinal, and the posterior region. Each area was scored from 0-3, so a maximum score of 12 could be achieved. PsA and AS patients presenting with peripheral joint disease involving large joints were examined at baseline, 3 and 6 months after initiation of local or systemic therapy (DMARDs/Biologics). For evaluation of the inflammatory status, the erythrocyte sedimentation rate (ESR) was determined. A cohort of 126 patients were enclosed, and 83 of these were followed for 6 months. At baseline before modification of the therapy, patients received DMARDs (n = 83), DMARDs plus biologics (n = 30), or biologic monotherapy (n = 29). Following intervention, all US scores demonstrated a marked improvement. The GSUS and the PDUS scores for all joint areas, except the PDUS score of the hip, exhibited a significant improvement (p joint involvement in PsA and AS patients and allows for treatment monitoring.

  12. Evaluation of osteochondral sample collection guided by computed tomography and magnetic resonance imaging for early detection of osteoarthritis in centrodistal joints of young Icelandic horses.

    Science.gov (United States)

    Ley, Charles J; Ekman, Stina; Dahlberg, Leif E; Björnsdóttir, Sigríður; Hansson, Kerstin

    2013-06-01

    To evaluate the use of CT and MRI for guidance of osteochondral sample collection for histologic detection of early osteoarthritic lesions in centrodistal (distal intertarsal) joints of horses. Right tarsal joints from the cadavers of 24 Icelandic horses aged 29 to 31 months. CT and MRI were used to evaluate the extent of suspected osteoarthritic changes in centrodistal joints, which were graded with a semiquantitative system. The anatomic regions with the highest grade of change were identified, and osteochondral samples were obtained from these regions. Samples were also obtained from the same centrodistal joints at predetermined sites. Histologic examination of all samples was performed, with samples classified as negative or positive for osteoarthritis, and results were compared between sample collection methods. Histologic examination revealed osteoarthritic lesions in 29% (7/24) of centrodistal joints with the predetermined method and in 63% (15/24) with the image-guided method. Significant associations were identified between histologic osteoarthritis detection and the summed image-guided sample collection site image grades, central osteophytes, articular cartilage thickness abnormalities, grade 2 articular mineralization front defects, and grade 2 marginal osteophytes. CT and MRI aided the detection of focal changes suggestive of early-stage osteoarthritis in the centrodistal joints of equine cadavers and may be useful for detection of similar disease in live horses. The first morphological changes of centrodistal joint osteoarthritis were suspected to be in the articular cartilage and the articular mineralization front regions.

  13. Evaluation of the degree of knee joint osteoarthritis in patients with early gray hair.

    Science.gov (United States)

    Kazemi, Behrooz; Ashraf, Alireza; Namazi, Mohammad Reza; Zarei, Fariba; Foruzi, Shima

    2013-04-01

    Osteoarthritis (OA) is the most common form of arthritis and one of the causes of pain and disability. The hair graying characteristic correlates strictly with chronological aging and take places to varying degrees in all individuals, disregarding gender or race. Comparison of the degrees of clinical and radiologic severity of the knee OA in individuals with early hair graying compared to ordinary individuals. A total of 60 patients with knee OA and similar demographic characteristics were enrolled in this study. All patients were classified in to 3 age subgroups in each of the case and control groups (30-40 year, 41-50 year, 51-60 year). In the case group, the patients must had early hair graying, too. Knee OA were classified using the Kellgren-Lawrence (KL) grading scale. Western Ontario McMaster University Osteoarthritis index (WOMAC) was applied to assess clinical severity of the knee OA. The mean ± SD of WOMAC index in the case group was 60.7 ± 15.9 and in the control group was 55.3 ± 15.3 (P = 0.1). The mean rank of KL scale in case group was 35.3 and in the control group was 25.6 (P = 0.02). Even at the same age of OA onset, the rate of progression of radiological findings and the grade of joint destruction in individuals with early hair graying are greater than normal individuals. However, clinical and functional relevant remain unclear.

  14. Evaluating Infertility

    Science.gov (United States)

    ... Education & Events Advocacy For Patients About ACOG Evaluating Infertility Home For Patients Search FAQs Evaluating Infertility Page ... Evaluating Infertility FAQ136, October 2017 PDF Format Evaluating Infertility Gynecologic Problems What is an infertility evaluation? When ...

  15. Evaluation of the diffusion of corticosteroids between the distal interphalangeal joint and navicular bursa in horses.

    Science.gov (United States)

    Pauwels, Frederik E; Schumacher, James; Castro, Fernando A; Holder, Troy E; Carroll, Roger C; Sega, Gary A; Rogers, Chris W

    2008-05-01

    To determine whether clinically effective concentrations of methylprednisolone or triamcinolone can be achieved in the navicular bursa after injection of methylprednisolone acetate (MPA) or triamcinolone acetonide (TA) into the distal interphalangeal joint (DIPJ) and whether clinically effective concentrations of these drugs can be achieved in the DIPJ after injecting the navicular bursa with the same doses of MPA or TA. 32 healthy horses. Horses in groups 1 through 4 received 40 mg of MPA in the DIPJ, 10 mg of TA in the DIPJ, 40 mg of MPA in the navicular bursa, and 10 mg of TA in the navicular bursa, respectively. Concentrations of corticosteroids that diffused into the adjacent synovial structure were determined. For group 1, injection of MPA into the DIPJ yielded a mean +/- SD concentration of 0.24 +/- 0.072 microg of methylprednisolone/mL in the navicular bursa. For group 2, injection of TA into the DIPJ yielded 0.124 +/- 0.075 microg of triamcinolone/mL in the navicular bursa. For group 3, injection of MPA into the navicular bursa yielded 0.05 +/- 0.012 microg of methylprednisolone/mL in the DIPJ. For group 4, injection of TA into the navicular bursa yielded 0.091 +/- 0.026 microg of triamcinolone/mL in the DIPJ. A clinically effective concentration of methylprednisolone or triamcinolone diffused between the DIPJ and navicular bursa after intra-articular or intrabursal injection, which would justify injection of the DIPJ with MPA or TA to ameliorate inflammation of the navicular bursa.

  16. A 5-year Evaluation and Results of Treatment of Chronic Llocked Dislocations of the Shoulder Joint

    Directory of Open Access Journals (Sweden)

    Syawash Mirsaid Ghazi

    2008-11-01

    Full Text Available Background:Chronic neglected dislocation of the shoulder joint can be defined as a neglected dislocation for more than a 3 week period.However, it has been shown that the negligence could range from a 24 hour period to 6 months1. Depending on age,signs, symptoms,etiology and types of dislocation, conservative treatment or surgical intervention could be considered.Methods: In this study, 16 patients (13 were male and 3 were female were treated with chronic shoulder dislocations, 3 of which had bilateral dislocations. The age of this group ranged from 13-65 years with a mean age of 34 years. These patients were treated by closed or open reduction, either anterior, posterior or both approaches. Of 19 dislocations, 6 were anterior unilateral, 7 posterior unilateral, 1 anterior bilateral and 2 posterior bilateral dislocations. The mean period between dislocations and treatments was 3 months (from 4 weeks to 11 months,And the mean follow up period was 40 months (from 21 months to 5 years.Results: This study has shown that treatment varies according to pathology. In  this study the mean size of head defects was 35% and the extent of severity determined the approach. Findings at the last follow up were assessed according to Rowe and Zarins score and of the 19 shoulders assessed, 9 showed good and 10 showed excellent results. There was no recurrence of the dislocation in any patient.Conclusion:In some selected instances, open reduction of a chronic locked neglected shoulder dislocation of a 6 months period or more in young patients is recommended.This method is, however, contraindicated in elderly patients; in such cases a shoulder prosthesis is indicated.  

  17. Evaluation of lesser metatarsophalangeal joint plantar plate tears with contrast-enhanced and fat-suppressed MRI

    Energy Technology Data Exchange (ETDEWEB)

    Dinoa, Vanessa; Ranke, Felipe von; Costa, Flavia; Marchiori, Edson [Federal University of Rio de Janeiro, Rio de Janeiro (Brazil)

    2016-05-15

    To present findings of plantar plate (PP) lesions from MRI with administration of gadolinium and to differentiate PP lesions from others causes of metatarsalgia. Two musculoskeletal radiologists reviewed 249 contrast-enhanced forefoot MRI scans from patients with metatarsalgia between June 2012 and June 2013. Evaluations focused on hyper-vascularized/fibrous tissue and other findings associated with PP tears. Fifty-nine patients had PP tears, 59 % were female. Most of these patients, 48/59 (81.4 %), had a single metatarsophalangeal (MTP) PP lesion in one foot, although 7/59 patients had one lesion in each foot, 3/59 (5.1 %) had two in one foot, and 1/59 (1.7 %) had three lesions in one foot. The second MTP joint was the most common location for PP tears (n = 56), followed by the third (n = 12) and fourth (n = 3) MTP joints. Lateral (n = 33) and full thickness (n = 28) PP lesions were the most frequent, and central (n = 3) and lateral/central (n = 7) tears were less prevalent. Fifty (70.5 %) PP lesions showed pericapsular fibrosis in pre-contrast sequences, and 21 (29.5 %) were visible only after administration of gadolinium. All PP lesions had collateral ligament involvement. Others findings included interosseous tendon lesions (n = 29), interosseous tendon rupture (n = 29), synovitis (n = 49), flexor tenosynovitis (n = 28), crossover toe (n = 2), hammertoe (n = 1), intermetatarsal space (IS) neuromas (n = 11), and third IS neuromas (n = 12). PP tears are a common cause of metatarsalgia, accounting for more than 20 % of cases in our sample. A substantial portion of the lesions (29.5 %) became visible only after the administration of gadolinium. (orig.)

  18. A new musculoskeletal ultrasound scoring system (US10) of the hands and wrist joints for evaluation of early rheumatoid arthritis patients.

    Science.gov (United States)

    Luz, Karine R; Pinheiro, Marcelo M; Petterle, Giovanna S; Dos Santos, Marla F; Fernandes, Artur R C; Natour, Jamil; Furtado, Rita N V

    2016-07-08

    To propose a novel ultrasound scoring system for hand and wrist joints (US10) for evaluation of patients with early rheumatoid arthritis (RA) and to correlate the US10 with clinical, laboratory and functional variables. Forty-eight early RA patients underwent clinical and laboratory evaluations as well as blinded ultrasound (US) examinations at baseline, three, six and 12 months. The proposed US10 system involved the assessment of the wrist, second and third metacarpophalangeal and proximal interphalangeal joints. The score consisted of inflammation parameters (synovial proliferation [SP], power Doppler [PD] and tenosynovitis [TN]) and joint damage parameters (bone erosion [BE] and cartilage damage [CD]). SP, PD, BE and CD were scored qualitatively (0-1) and semi-quantitatively (grades 0-3). Tenosynovitis was scored as presence/absence. The evaluation also involved the 28-Joint Disease Activity Score (DAS28), Health Assessment Questionnaire (HAQ) and C-reactive protein level (CRP). Mean duration of symptoms was 7.58±3.59 months. Significant correlations (psystem proved to be a useful tool for monitoring inflammation and joint damage in early RA patients, demonstrating significant correlations with longitudinal changes in disease activity and functional status. Copyright © 2016. Published by Elsevier Editora Ltda.

  19. Delivery of integrated diabetes care using logistics and information technology--the Joint Asia Diabetes Evaluation (JADE) program.

    Science.gov (United States)

    Chan, Juliana C N; Ozaki, Risa; Luk, Andrea; Kong, Alice P S; Ma, Ronald C W; Chow, Francis C C; Wong, Patrick; Wong, Rebecca; Chung, Harriet; Chiu, Cherry; Wolthers, Troels; Tong, Peter C Y; Ko, Gary T C; So, Wing-Yee; Lyubomirsky, Greg

    2014-12-01

    Diabetes is a global epidemic, and many affected individuals are undiagnosed, untreated, or uncontrolled. The silent and multi-system nature of diabetes and its complications, with complex care protocols, are often associated with omission of periodic assessments, clinical inertia, poor treatment compliance, and care fragmentation. These barriers at the system, patient, and care-provider levels have resulted in poor control of risk factors and under-usage of potentially life-saving medications such as statins and renin-angiotensin system inhibitors. However, in the clinical trial setting, use of nurses and protocol with frequent contact and regular monitoring have resulted in marked differences in event rates compared to epidemiological data collected in the real-world setting. The phenotypic heterogeneity and cognitive-psychological-behavioral needs of people with diabetes call for regular risk stratification to personalize care. Quality improvement initiatives targeted at patient education, task delegation, case management, and self-care promotion had the largest effect size in improving cardio-metabolic risk factors. The Joint Asia Diabetes Evaluation (JADE) program is an innovative care prototype that advocates a change in clinic setting and workflow, coordinated by a doctor-nurse team and augmented by a web-based portal, which incorporates care protocols and a validated risk engine to provide decision support and regular feedback. By using logistics and information technology, supported by a network of health-care professionals to provide integrated, holistic, and evidence-based care, the JADE Program aims to establish a high-quality regional diabetes database to reflect the status of diabetes care in real-world practice, confirm efficacy data, and identify unmet needs. Through collaborative efforts, we shall evaluate the feasibility, acceptability, and cost-effectiveness of this "high tech, soft touch" model to make diabetes and chronic disease care more

  20. Accounting for CO2 variability over East Asia with a regional joint inversion system and its preliminary evaluation

    Science.gov (United States)

    Kou, Xingxia; Tian, Xiangjun; Zhang, Meigen; Peng, Zhen; Zhang, Xiaoling

    2017-10-01

    A regional surface carbon dioxide (CO2) flux inversion system, the Tan-Tracker-Region, was developed by incorporating an assimilation scheme into the Community Multiscale Air Quality (CMAQ) regional chemical transport model to resolve fine-scale CO2 variability over East Asia. The proper orthogonal decomposition-based ensemble four-dimensional variational data assimilation approach (POD-4DVar) is the core algorithm for the joint assimilation framework, and simultaneous assimilations of CO2 concentrations and surface CO2 fluxes are applied to help reduce the uncertainty in initial CO2 concentrations. A persistence dynamical model was developed to describe the evolution of the surface CO2 fluxes and help avoid the "signal-to-noise" problem; thus, CO2 fluxes could be estimated as a whole at the model grid scale, with better use of observation information. The performance of the regional inversion system was evaluated through a group of single-observation-based observing system simulation experiments (OSSEs). The results of the experiments suggest that a reliable performance of Tan-Tracker-Region is dependent on certain assimilation parameter choices, for example, an optimized window length of approximately 3 h, an ensemble size of approximately 100, and a covariance localization radius of approximately 320 km. This is probably due to the strong diurnal variation and spatial heterogeneity in the fine-scale CMAQ simulation, which could affect the performance of the regional inversion system. In addition, because all observations can be artificially obtained in OSSEs, the performance of Tan-Tracker-Region was further evaluated through different densities of the artificial observation network in different CO2 flux situations. The results indicate that more observation sites would be useful to systematically improve the estimation of CO2 concentration and flux in large areas over the model domain. The work presented here forms a foundation for future research in which a

  1. A preliminary case series evaluating the safety and immediate to short-term clinical benefits of joint mobilization in hemophilic arthritis of the lower limb.

    Science.gov (United States)

    Scaddan, Emma; Rowell, John; O'Leary, Shaun

    2017-09-01

    Arthritis resulting from recurrent intra-articular bleeding in individuals with hemophilia can be severely debilitating due to joint pain and stiffness with subsequent loss of mobility and function. Very limited studies have investigated the potential benefits of joint mobilization for this condition. This case series is a preliminary investigation of safety, as well as immediate and short-term clinical benefits, associated with gentle knee and ankle joint mobilization in people with hemophilic arthropathy. A single intervention of joint mobilization was applied to the affected knees and/or ankles of 16 individuals with severe or moderate hemophilia within a public hospital setting. Adverse events, as well as immediate (pain-free passive joint range, Timed Up and Go Test with maximum pain numerical rating scale) and short-term (Lower Extremity Functional Scale) effects of the intervention were evaluated with a repeated measures ANOVA. There were no adverse events. An immediate significant increase was observed in pain-free passive ankle joint range of motion ( p  mobilization intervention. The findings of this case series suggest that gentle joint mobilization techniques may be safely considered as part of a multimodal management approach for hemophilic arthropathy.

  2. Building model analysis applications with the Joint Universal Parameter IdenTification and Evaluation of Reliability (JUPITER) API

    Science.gov (United States)

    Banta, E.R.; Hill, M.C.; Poeter, E.; Doherty, J.E.; Babendreier, J.

    2008-01-01

    The open-source, public domain JUPITER (Joint Universal Parameter IdenTification and Evaluation of Reliability) API (Application Programming Interface) provides conventions and Fortran-90 modules to develop applications (computer programs) for analyzing process models. The input and output conventions allow application users to access various applications and the analysis methods they embody with a minimum of time and effort. Process models simulate, for example, physical, chemical, and (or) biological systems of interest using phenomenological, theoretical, or heuristic approaches. The types of model analyses supported by the JUPITER API include, but are not limited to, sensitivity analysis, data needs assessment, calibration, uncertainty analysis, model discrimination, and optimization. The advantages provided by the JUPITER API for users and programmers allow for rapid programming and testing of new ideas. Application-specific coding can be in languages other than the Fortran-90 of the API. This article briefly describes the capabilities and utility of the JUPITER API, lists existing applications, and uses UCODE_2005 as an example.

  3. Evaluation of single and joint toxicity of perfluorooctane sulfonate and zinc to Limnodrilus hoffmeisteri: Acute toxicity, bioaccumulation and oxidative stress.

    Science.gov (United States)

    Liu, Jiaoqin; Qu, Ruijuan; Yan, Liqing; Wang, Liansheng; Wang, Zunyao

    2016-01-15

    Perfluorooctane sulfonate (PFOS) and zinc have been detected in aquatic environment widely. In order to study the combined effects of PFOS and Zn, a series of experiments was conducted to explore the acute mortality, bioaccumulation and antioxidant status of Limnodrilus hoffmeisteri. The acute toxicity was evaluated by calculating 24h-EC50 values, and it was observed that 24h-EC50 values in single and joint treatments decreased with decreasing pH value or increasing exposure concentration. Toxic unit analysis suggested that the combined effects of the PFOS+Zn binary mixture were mostly simple addition, with 8 groups showing synergism and only one group showing antagonism. The analysis of internal Zn and PFOS concentration showed that the possible interaction between Zn and PFOS can affect the bioaccumulation of the two chemicals in L. hoffmeisteri. In addition, oxidative stress status was assessed by measuring oxidation-related biochemical parameters such as superoxide dismutase, glutathione peroxidase and malondialdehyde, and the integrated biomarker response index was estimated to rank the toxicity order. Exposures to Zn and PFOS were found to evoke some changes in the antioxidant defense system, and a strong self-adaptive ability was noticed for L. hoffmeisteri after 10 d exposure. Copyright © 2015 Elsevier B.V. All rights reserved.

  4. Organizational value in enhancing individual research use capacity: a joint evaluation project led by EXTRA and SEARCH Canada.

    Science.gov (United States)

    Fletcher, Laura; Thornhill, Jennifer

    2009-01-01

    Evidence-informed decision-making supports high-quality, efficient healthcare. Programs such as SEARCH Classic (Swift Efficient Application of Research in Community Health) and EXTRA (Executive Training for Research Application) give health system decision-makers the skills and experience required to apply the best evidence to their work. But effectively leading change in how evidence comes to bear on the overall management and delivery of care requires strategies aimed at whole organizations and systems. The Canadian Health Services Research Foundation (CHSRF, EXTRA's managing organization) and SEARCH Canada (the SEARCH Classic program's managing organization) recently launched a jointly commissioned research study to assess organizational mechanisms and the impacts of these programs. Moving away from a focus on individual trainees and their immediate organizational connections, this evaluation builds on the evidence to date that leads to the hypothesis that a critical mass of highly educated, evidence-savvy decision-makers (senior executives in the case of EXTRA; middle- and front-line managers in the case of SEARCH Canada) enhance organizational capacity to use knowledge and ultimately lead to a more systematic use of evidence at the systems level (Champagne et al. 2008).

  5. Evaluating the Joint Effect of Sea Level and Wind Waves to Predict Extreme Coastal Flooding Risks in the Future Climate

    Science.gov (United States)

    Leijala, U.; Bjorkqvist, J. V.; Kahma, K. K.; Pellikka, H.; Johansson, M. M.; Särkkä, J.

    2016-12-01

    The evaluation of coastal flooding risks has a crucial role in supporting secure planning, building and operation of densely populated and vulnerable coastal areas. Global mean sea level rise predictions together with past short-term sea level variability form the basis of the sea level projections and flooding probabilities for the future. However, the coastal effect of the sea level is also affected by the wave conditions. Coastal wave height may vary significantly locally as the wave field is affected by the islands, shape of the shoreline and topography of the seabed. In this study, we present a method to combine sea level events with wind-generated waves by using a method based on location-specific probability distributions. Our outcome gives an estimate for the maximum wave crest elevation at a steep shore during a storm surge. Simply summing the maximum sea level and maximum wave height components together might result in an overestimation of the joint effect, thus a method based on probability distributions is sensible. The wave statistics of our study are constructed of individual wave buoy measurements conducted during 2012-2014 at multiple sites outside Helsinki, the capital of Finland, which is located on the coast of the Gulf of Finland in the Baltic Sea. An estimate of short-term sea level variability is based on the last 30 years (1986-2015) of hourly data from the Helsinki tide gauge. Predictions for the future long-term mean sea level changes at Helsinki are based on scenarios including the most recent knowledge of the global mean sea level rise, local land uplift, and changes in the total water amount in the Baltic Sea. The method developed in this study gives a new tool for evaluating utmost coastal flood events by combining sea level with the wave height information. The method can be used to evaluate risk levels of different coastal infrastructure and can be applied to any coastal areas where adequate sea level and wave data are available.

  6. Comparison of measurements of dorsolateral subluxation of the femoral head and maximal passive laxity for evaluation of the coxofemoral joint in dogs.

    Science.gov (United States)

    Farese, J P; Lust, G; Williams, A J; Dykes, N L; Todhunter, R J

    1999-12-01

    To determine whether dorsolateral subluxation (DLS) of the femoral head reflects osseous conformation of the coxofemoral (hip) joint and represents a property distinct from maximum passive laxity of the hip joint in dogs. 14 Labrador Retrievers, 16 Greyhounds, 58 Greyhound-Labrador Retriever mixed-breed dogs, and 1 Rottweiler. DLS of the femoral head (DLS score) and passive laxity of the hip joint (distraction index) were determined radiographically in 3 groups of dogs: not treated (167 joints of 84 dogs); before and after injecting 2 ml of hyaluronan into 25 hip joints of 13 dogs; and before and after unilateral triple pelvic osteotomy in 5 dogs. Results of the 2 methods were compared for each group. In untreated dogs, the correlation coefficient (r) of DLS score versus distraction index was -0.73 and -0.69 for 84 left and 83 right hip joints, respectively. Mean coefficient of determination (r2) for both hips was 0.5. Mean DLS score did not differ before and after intra-articular injection of hyaluronan into either hip joint, whereas mean distraction index increased significantly after intra-articular injection. Unilateral triple pelvic osteotomy resulted in a significant increase in DLS score, compared with values obtained before surgery. However, distraction index before and after surgery did not differ significantly. The DLS test assesses the congruity of the acetabulum and the femoral head in a canine hip joint and thus represents a characteristic distinct from maximum passive laxity. The DLS score and the distraction index evaluate different components of hip joint stability.

  7. An Evaluation of Global and Local Tensile Properties of Friction-Stir Welded DP980 Dual-Phase Steel Joints Using a Digital Image Correlation Method

    Directory of Open Access Journals (Sweden)

    Hyoungwook Lee

    2015-12-01

    Full Text Available The effect of the microstructure heterogeneity on the tensile plastic deformation characteristic of friction-stir-welded (FSW dual-phase (DP steel was investigated for the potential applications on the lightweight design of vehicles. Friction-stir-welded specimens with a butt joint configuration were prepared, and quasi-static tensile tests were conducted, to evaluate the tensile properties of DP980 dual-phase steels. The friction-stir welding led to the formation of martensite and a significant hardness rise in the stir zone (SZ, but the presence of a soft zone in the heat-affected zone (HAZ was caused by tempering of the pre-existing martensite. Owing to the appearance of severe soft zone, DP980 FSW joint showed almost 93% joint efficiency with the view-point of ultimate tensile strength and relatively low ductility than the base metal (BM. The local tensile deformation characteristic of the FSW joints was also examined using the digital image correlation (DIC methodology by mapping the global and local strain distribution, and was subsequently analyzed by mechanics calculation. It is found that the tensile deformation of the FSW joints is highly heterogeneous, leading to a significant decrease in global ductility. The HAZ of the joints is the weakest region where the strain localizes early, and this localization extends until fracture with a strain near 30%, while the strain in the SZ and BM is only 1% and 4%, respectively. Local constitutive properties in different heterogeneous regions through the friction-stir-welded joint was also briefly evaluated by assuming iso-stress conditions. The local stress-strain curves of individual weld zones provide a clear indication of the heterogeneity of the local mechanical properties.

  8. An Evaluation of Global and Local Tensile Properties of Friction-Stir Welded DP980 Dual-Phase Steel Joints Using a Digital Image Correlation Method.

    Science.gov (United States)

    Lee, Hyoungwook; Kim, Cheolhee; Song, Jung Han

    2015-12-04

    The effect of the microstructure heterogeneity on the tensile plastic deformation characteristic of friction-stir-welded (FSW) dual-phase (DP) steel was investigated for the potential applications on the lightweight design of vehicles. Friction-stir-welded specimens with a butt joint configuration were prepared, and quasi-static tensile tests were conducted, to evaluate the tensile properties of DP980 dual-phase steels. The friction-stir welding led to the formation of martensite and a significant hardness rise in the stir zone (SZ), but the presence of a soft zone in the heat-affected zone (HAZ) was caused by tempering of the pre-existing martensite. Owing to the appearance of severe soft zone, DP980 FSW joint showed almost 93% joint efficiency with the view-point of ultimate tensile strength and relatively low ductility than the base metal (BM). The local tensile deformation characteristic of the FSW joints was also examined using the digital image correlation (DIC) methodology by mapping the global and local strain distribution, and was subsequently analyzed by mechanics calculation. It is found that the tensile deformation of the FSW joints is highly heterogeneous, leading to a significant decrease in global ductility. The HAZ of the joints is the weakest region where the strain localizes early, and this localization extends until fracture with a strain near 30%, while the strain in the SZ and BM is only 1% and 4%, respectively. Local constitutive properties in different heterogeneous regions through the friction-stir-welded joint was also briefly evaluated by assuming iso-stress conditions. The local stress-strain curves of individual weld zones provide a clear indication of the heterogeneity of the local mechanical properties.

  9. Biomechanical evaluation of effect of coracoid tunnel placement on load to failure of fixation during repair of acromioclavicular joint dislocations.

    Science.gov (United States)

    Ferreira, Joel V; Chowaniec, David; Obopilwe, Elifho; Nowak, Michael D; Arciero, Robert A; Mazzocca, Augustus D

    2012-09-01

    To evaluate the effect of entry and exit points of the coracoid tunnel on load to failure and mode of failure, to reduce the incidence of coracoid fractures and acromioclavicular joint repair failures. This study investigates 5 tunnel placements based on different entry and exit points in the coracoid process: center-center orientation represents perfect placement of the bone tunnel and served as perfect tunnel placement in our study. Four common errors in drilling were then tested and acted as the experimental groups in our study (medial-center, center-medial, lateral-center, and center-lateral). Using 35 cadaveric shoulders (mean age, 68.0 ± 13.0 years), we tested these 5 tunnel orientations using a single repair technique (cortical button) loaded to failure on an MTS 858 Servohydraulic test system (MTS Systems, Eden Prairie, MN). A control group of 7 cadaveric shoulders without the presence of a coracoid tunnel was also tested to determine the type of fracture pattern that occurred. The coracoids without tunnel drilling fractured in patterns similar to traumatic coracoid injuries. With regard to the 5 tunnel groups, it was found that the loads to failure with center-center and medial-center tunnel placement were significantly higher than those with center-medial, center-lateral, and lateral-center tunnel placement. The failure modes of the former were primarily within the repair constructs, whereas those of the latter were primarily due to bony failure. Our biomechanical results showed a higher peak load to failure with a center-center or medial-center tunnel orientation, which may lessen the risk of coracoid fracture during drilling with a 6-mm cannulated drill bit. Proper trajectory of the drill during formation of a coracoid bone tunnel can help reduce the risk of coracoid process fracture and repair failure. Copyright © 2012 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

  10. Accuracy of magnetic resonance imaging to detect cartilage loss in severe osteoarthritis of the first carpometacarpal joint: comparison with histological evaluation.

    Science.gov (United States)

    Saltzherr, Michael S; Coert, J Henk; Selles, Ruud W; van Neck, Johan W; Jaquet, Jean-Bart; van Osch, Gerjo J V M; Oei, Edwin H G; Luime, Jolanda J; Muradin, Galied S R

    2017-03-14

    Magnetic resonance imaging (MRI) is increasingly used for research in hand osteoarthritis, but imaging the thin cartilage layers in the hand joints remains challenging. We therefore assessed the accuracy of MRI in detecting cartilage loss in patients with symptomatic osteoarthritis of the first carpometacarpal (CMC1) joint. Twelve patients scheduled for trapeziectomy to treat severe symptomatic osteoarthritis of the CMC1 joint underwent a preoperative high resolution 3D spoiled gradient (SPGR) MRI scan. Subsequently, the resected trapezium was evaluated histologically. The sections were scored for cartilage damage severity (Osteoarthritis Research Society International (OARSI) score), and extent of damage (percentage surface area). Each MRI scan was scored for the area of normal cartilage, partial cartilage loss and full cartilage loss. The percentages of the total surface area with any cartilage loss and full-thickness cartilage loss were calculated using MRI and histological evaluation. MRI and histological evaluation both identified large areas of overall cartilage loss. The median (IQR) surface area of any cartilage loss on MRI was 98% (82-100%), and on histological assessment 96% (87-98%). However, MRI underestimated the extent of full-thickness cartilage loss. The median (IQR) surface area of full-thickness cartilage loss on MRI was 43% (22-70%), and on histological evaluation 79% (67-85%). The difference was caused by a thin layer of high signal on the articulating surface, which was interpreted as damaged cartilage on MRI but which was not identified on histological evaluation. Three-dimensional SPGR MRI of the CMC1 joint demonstrates overall cartilage damage, but underestimates full-thickness cartilage loss in patients with advanced osteoarthritis.

  11. Greyscale and power Doppler ultrasonographic evaluation of normal synovial joints: correlation with pro- and anti-inflammatory cytokines and angiogenic factors.

    Science.gov (United States)

    Kitchen, Joanne; Kane, David

    2015-03-01

    US is a promising tool in evaluating RA synovitis, but abnormal US findings have been reported in small subsets of normal joints in healthy subjects. This study aimed to systematically assess greyscale US (GSUS) and power Doppler US (PDUS) findings in 40 peripheral joints-the 28-joint DAS (DAS28) set, ankles and MTP joints-in healthy subjects. A composite score of abnormal US findings in 40 joints was compared with serum levels of pro-inflammatory cytokines. US of 60 standard views in 40 joints was performed in 30 healthy subjects (total 3600 images). GSUS and PDUS were scored semi-quantitatively (0-3). Serum samples were obtained at the time of US and analysed for IL-1α, IL-1β, IL-2, IL-6, IL-8, VEGF, TNF-α and IFN-γ using biochip array technology. GSUS abnormalities were more frequent than PDUS abnormalities [mean total GSUS score = 20.07 (range 6-45; maximum potential score = 180), mean total PDUS score = 4.8 (range 0-13)]. GSUS score increased with increasing age (Spearman's ρ = 0.383, P = 0.037). A PDUS signal >1 was observed only in the wrist (8%) and MTP1 (3%). GSUS scores did not correlate with any pro-inflammatory cytokine level. The total PDUS score correlated significantly with serum VEGF (r = 0.395, P = 0.046). PDUS signals >1 are rarely seen in normal synovial joints. GSUS synovitis, but not PDUS, may reflect age-related joint changes. PDUS correlated with VEGF, providing further evidence of a central role for VEGF in synovial neo-angiogenesis. © The Author 2014. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  12. Evaluation of base material and welded joints designated for membrane wall components made from low-alloy steels in large boilermaker conditions

    Energy Technology Data Exchange (ETDEWEB)

    Dobrzanski, Janusz; Zielinski, Adam [Institute for Ferrous Metallurgy, Gliwice (Poland); Pasternak, Jerzy [Boiler Engineering Company RAFAKO S.A., Raciborz (Poland)

    2010-07-01

    Supercritical operating parameters of lower emission power units require novel creep resisting steels. Therefore, this paper constains selected information, results of collectors made from the new low-alloy bainitic creep-resistant steels as 7CrWVNb9-6(P23) and 7CrMoVTiB10-10(P24) performed in large boilermaker conditions. The research and implementation process includes: - evaluation, comparison of requested properties of base material and welded joints as tensile strength, impact strength and technological properties, - destructive examinations with evaluation of welded joints and HAZ structure and hardness distribution, - evaluation of creep resistance properties and structure stability after heat treatments and again process of base material, HAZ and welded joints, - influence of manufacturing process in large boilermaker conditions and after simulated operation. A new creep-resistant steels to be used, in order to comply with the operational requirements, as to assure the appropriate reliability and safety of the boiler equipment in operation process. (orig.)

  13. Quantitative magnetic resonance imaging (MRI) evaluation of cartilage repair after microfracture treatment for full-thickness cartilage defect models in rabbit knee joints: correlations with histological findings

    Energy Technology Data Exchange (ETDEWEB)

    Tao, Hongyue; Feng, Xiaoyuan; Chen, Shuang [Fudan University, Department of Radiology, Huashan Hospital, Shanghai (China); Li, Hong; Hua, Yinghui [Fudan University, Department of Sports Medicine, Huashan Hospital, Shanghai (China); Chen, Zhongqing [Fudan University, Department of Pathology, Huashan Hospital, Shanghai (China)

    2014-11-26

    To evaluate repair tissue (RT) after microfracture treatment for full-thickness cartilage defect models using quantitative MRI and investigate the correlations between MRI and histological findings. The animal experiment was approved by the Animal Care and Use Committee of our college. Thirty-six full-thickness cartilage defect models in rabbit knee joints were assigned to the microfracture or joint debridement group (as control). Each group consisted of 3-week, 5-week, and 7-week subgroups. MR imaging, including a three-dimensional double-echo steady-state sequence (3D-DESS), and T2 mapping were performed at 3, 5, and 7 weeks postoperatively. The thickness and T2 indices of RT were calculated. After MRI scans at each time point, operation sites were removed to make hematoxylin-eosin (H and E)-stained sections. Histological results were evaluated using the modified O'Driscoll score system. Comparisons were made between the two groups with respect to the MRI and histological findings, and correlation analysis was performed within each group. The thickness index and histological O'Driscoll score of RT in the two groups increased over time, while the T2 index decreased. The thickness index and histological O'Driscoll score of the microfracture group were higher than in the joint debridement group at each time point. The T2 index of the microfracture group was lower than in the joint debridement group at 3 weeks (P = 0.006), while it was higher than in the joint debridement group at 5 and 7 weeks (P = 0.025 and 0.025). The thickness index was positively correlated with the histological O'Driscoll score in both groups (microfracture: r{sub s} = 0.745, P < 0.001; joint debridement: r{sub s} = 0.680, P = 0.002). The T2 index was negatively correlated with the histological O'Driscoll score in both groups (microfracture: r{sub s} = -0.715, P = 0.002; joint debridement: r{sub s} = -0.826, P < 0.001). Significant improvement over time after

  14. Evaluation of the magnitude of hip joint deformation in subjects with avascular necrosis of the hip joint during walking with and without Scottish Rite orthosis.

    Science.gov (United States)

    Karimi, Mohammad Taghi; Mohammadi, Ali; Ebrahimi, Mohammad Hossein; McGarry, Anthony

    2017-02-01

    The femoral head in subjects with leg calve perthes disease (LCPD) is generally considerably deformed. It is debatable whether this deformation is due to an increase in applied loads, a decrease in bone mineral density or a change in containment of articular surfaces. The aim of this study was to determine the influence of these factors on deformation of the femoral head. Two subjects with LCPD participated in this study. Subject motion and the forces applied on the affected leg were recorded using a motion analysis system (QualsisTM) and a Kistler force plate. OpenSim software was used to determine joint contact force of the hip joint whilst walking with and without a Scottish Rite orthosis. 3D Models of hip joints of both subjects were produced by Mimics software. The deformation of femoral bone was determined by Abaqus. Mean values of the force applied on the leg increased while walking with the orthosis. There was no difference between bone mineral density (BMD) of the femoral bone of normal and LCPD sides (p-value>0.05) and no difference between hip joint contact force of normal and LCPD sides. Hip joint containment appeared to decrease follow the use of the orthosis. It can be concluded that the deformation of femoral head in LCPD may not be due to change in BMD or applied load. Although the Scottish Rite orthosis is used mostly to increase hip joint containment, it appears to reduce hip joint contact area. It is recommended that a similar study is conducted using a higher number of subjects. Copyright © 2016 IPEM. All rights reserved.

  15. Enhanced human service transportation models : joint demonstration. Phase 1, System planning and design process evaluation : baseline analysis

    Science.gov (United States)

    2007-11-13

    This document presents the findings from the baseline phase of the evaluation of the process being used by eight sites to develop a design for a Travel Management Coordination Center (TMCC) for improved coordination of human service transportation wi...

  16. Gray-scale and color duplex Doppler ultrasound of hand joints in the evaluation of disease activity and treatment in rheumatoid arthritis.

    Science.gov (United States)

    Ivanac, Gordana; Morović-Vergles, Jadranka; Brkljačić, Boris

    2015-06-01

    To evaluate the role of gray-scale and color duplex-Doppler ultrasound (CDUS) in diagnosis of changes of hand joints and assessment of treatment efficacy in patients with rheumatoid arthritis (RA) by comparing qualitative and quantitative US parameters with clinical and laboratory indicators of disease activity. Ulnocarpal (UC), metacarpophalangeal (MCP), and proximal interphalangeal (PIP) joints in 30 patients with RA were examined by gray-scale and CDUS before and after six months of treatment. Morphologic and quantitative Doppler findings (synovial thickness, effusion quantity, vascularization degree, resistance index, velocities) were compared with clinical indicators of disease progression: disease activity score (DAS 28), Health Assessment Questionnaire (HAQ), rheumatoid factor (RF), erythrocyte sedimentation rate (ESR), and C reactive protein (CRP). Clinical indicators changed significantly after treatment: ESR from 38.1±22.4 mm/h to 27.8±20.9 mm/h (P=0.013), DAS 28 from 5.47±1.56 to 3.87±1.65 (Pjoints we observed a significant change in at least one US parameter, in 6 out of 12 joints we observed a significant change in ≥2 parameters, and in 2 UC joints we observed significant changes in ≥3 parameters. The new finding was that the cut-off values of resistance index of 0.40 at baseline and of 0.55 after the treatment indicated the presence of active disease and the efficacy of treatment, respectively; also it was noticed that PIP joints can be omitted from examination protocol. Gray scale and CDUS are useful in diagnosis of changes in UC and MCP joints of patients with RA and in monitoring the treatment efficacy.

  17. Evaluation of new composite rigid joint under cyclic loading and its effect on one-floor composite frame

    Directory of Open Access Journals (Sweden)

    Azadeh Haghighat

    2017-08-01

    Full Text Available In order to improve the performance of structure against lateral and gravity loads, new systems known as composite systems consisting of the reinforced concrete columns and steel beams (RCS can be used and thereby the advantages of concrete beside steel are acquired. RCS joints can be implemented as either through-beam-type joint or through-column-type joint. In this paper, a concrete joint as standard reference joint and a proposed composite joint through-column‎ with new details were built and tested under cyclic loading. Then, using numerical analysis by finite element method, the behavior of composite joint under cyclic loading has been studied and the behavior and performance of proposed composite joint has been studied by comparing the results with that of concrete joint. The results showed that the joint composition in this way resulted in decreasing of the compressive and tensile damages of concrete and increasing in loading capacity, ductility, stiffness and energy absorption. General results of application of composite joint at the one floor-one span composite frame indicating that lateral loading capacity of frame was increased and the performance of frame was improved.

  18. Evaluation Use in Evaluation Systems

    DEFF Research Database (Denmark)

    Højlund, Steven

    2014-01-01

    This article investigates the European Union’s evaluation system and its conduciveness to evaluation use. Taking the European Commission’s LIFE programme as its case, the article makes an empirical contribution to an emerging focus in the literature on the importance of organization...... and institutions when analyzing evaluation use. By focusing on the European Union’s evaluation system the article finds that evaluation use mainly takes place in the European Commission and less so in the European Parliament and the European Council. The main explanatory factors enabling evaluation use relate...... to the system’s formalization of evaluation implementation and use; these factors ensure evaluation quality, timeliness and capacity in the Commission. At the same time, however, the system’s formalization also impedes evaluation use, reducing the direct influence of evaluations on policy-making and effectively...

  19. Nondestructive evaluations

    Energy Technology Data Exchange (ETDEWEB)

    Kulkarni, S.

    1993-03-01

    This report discusses Nondestructive Evaluation (NDE) thrust area which supports initiatives that advance inspection science and technology. The goal of the NDE thrust area is to provide cutting-edge technologies that have promise of inspection tools three to five years in the future. In selecting projects, the thrust area anticipates the needs of existing and future Lawrence Livermore National Laboratory (LLNL) programs. NDE provides materials characterization inspections, finished parts, and complex objects to find flaws and fabrication defects and to determine their physical and chemical characteristics. NDE also encompasses process monitoring and control sensors and the monitoring of in-service damage. For concurrent engineering, NDE becomes a frontline technology and strongly impacts issues of certification and of life prediction and extension. In FY-92, in addition to supporting LLNL programs and the activities of nuclear weapons contractors, NDE has initiated several projects with government agencies and private industries to study aging infrastructures and to advance manufacturing processes. Examples of these projects are (1) the Aging Airplanes Inspection Program for the Federal Aviation Administration, (2) Signal Processing of Acoustic Signatures of Heart Valves for Shiley, Inc.; and (3) Turbine Blade Inspection for the Air Force, jointly with Southwest Research Institute and Garrett. In FY-92, the primary contributions of the NDE thrust area, described in this report were in fieldable chemical sensor systems, computed tomography, and laser generation and detection of ultrasonic energy.

  20. Three-point Dixon chemical-shift imaging for evaluating articular cartilage defects in the knee joint on a low-field-strength open magnet.

    Science.gov (United States)

    Bredella, M A; Losasso, C; Moelleken, S C; Huegli, R W; Genant, H K; Tirman, P F

    2001-12-01

    The purpose of our study was to assess the value of a modified three-point Dixon MR technique for evaluating articular cartilage defects in the knee joint on a low-field-strength open magnet, correlated with arthroscopy. Twenty consecutive patients who underwent both MR imaging and arthroscopy of the knee joint for suspected internal derangement were examined. A modified three-point Dixon MR sequence with a single radiofrequency echo single-scan method for water and fat separation with correction of the static field inhomogeneities was performed on a 0.35-T open magnet to obtain fat suppression. The MR images were prospectively evaluated for the presence and grade of articular cartilage defects. Uniform fat suppression was obtained in all patients using the modified three-point Dixon technique. Fifty-nine cartilage abnormalities were identified in 19 patients on the basis of arthroscopy. Forty-seven of 59 arthroscopically proven abnormalities were prospectively detected on MR imaging. Compared with arthroscopy, the overall sensitivity of the modified three-point Dixon technique in detecting cartilage lesions was 80% and the specificity was 73%. Sixty-five percent of the cartilage abnormalities were graded identically on MR imaging and arthroscopy. The modified three-point Dixon sequence is a useful technique for achieving fat suppression in the knee joint on a 0.35-T open magnet. It is a sensitive and specific technique for the assessment of cartilage abnormalities in the knee.

  1. JUPITER: Joint Universal Parameter IdenTification and Evaluation of Reliability - An Application Programming Interface (API) for Model Analysis

    Science.gov (United States)

    Banta, Edward R.; Poeter, Eileen P.; Doherty, John E.; Hill, Mary C.

    2006-01-01

    he Joint Universal Parameter IdenTification and Evaluation of Reliability Application Programming Interface (JUPITER API) improves the computer programming resources available to those developing applications (computer programs) for model analysis.The JUPITER API consists of eleven Fortran-90 modules that provide for encapsulation of data and operations on that data. Each module contains one or more entities: data, data types, subroutines, functions, and generic interfaces. The modules do not constitute computer programs themselves; instead, they are used to construct computer programs. Such computer programs are called applications of the API. The API provides common modeling operations for use by a variety of computer applications.The models being analyzed are referred to here as process models, and may, for example, represent the physics, chemistry, and(or) biology of a field or laboratory system. Process models commonly are constructed using published models such as MODFLOW (Harbaugh et al., 2000; Harbaugh, 2005), MT3DMS (Zheng and Wang, 1996), HSPF (Bicknell et al., 1997), PRMS (Leavesley and Stannard, 1995), and many others. The process model may be accessed by a JUPITER API application as an external program, or it may be implemented as a subroutine within a JUPITER API application . In either case, execution of the model takes place in a framework designed by the application programmer. This framework can be designed to take advantage of any parallel processing capabilities possessed by the process model, as well as the parallel-processing capabilities of the JUPITER API.Model analyses for which the JUPITER API could be useful include, for example: Compare model results to observed values to determine how well the model reproduces system processes and characteristics.Use sensitivity analysis to determine the information provided by observations to parameters and predictions of interest.Determine the additional data needed to improve selected model

  2. Evaluation of the diffusivity and susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints

    Directory of Open Access Journals (Sweden)

    B Araújo

    2016-09-01

    Full Text Available This paper presents a study of susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints by SMAW and GTAW processes. By varying the consumables used and the use of the same interpass temperature three different welded joints were obtained. Tests of hydrogen embrittlement susceptibility were performed according to ASTM G129-2006 with an aqueous solution (Solution A - TM0177/2005 NACE sodium thiosulfate (Na2S2O3 replacing the bubbling of H2S. From the elongation values was observed that the joint obtained in all welding conditions showed susceptibility to hydrogen embrittlement, which was determined by the elongation ratio. The joints that showed higher levels of hardness showed higher susceptibility to hydrogen embrittlement. The joints obtained with higher welding speeds for the same amount of heat input presented a reduction in the rate of hydrogen embrittlement. All joints tested in solution showed fracture surfaces with quasi cleavage zones.

  3. Korea-Japan Joint Research on Development of Seismic Capacity Evaluation and Enhancement Technology Considering Near-Fault Effect

    Energy Technology Data Exchange (ETDEWEB)

    Choun, Young Sun; Choi, In Kil; Kim, Min Kyu [KAERI, Daejon (Korea, Republic of); Ohtori, Yasuki; Shiba, Yoshiaki; Nakajima, Masato [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    2005-12-15

    Several recent improved methods for the EGFM are introduced in order to avoid artificial holes seen in the synthetic acceleration spectrum. Furthermore evaluation of input ground motions at Wolsung NPP are performed by varying the source parameters that may control the high-frequency wave radiation and the deviation of the synthetic motions are revealed. The PSHA case studies for four NPP sites (Wolsung, Kori, Uljin, Younggwang) are performed. In the analysis, site-specific attenuation equations developed for Korean NPP sites are employed, and the seismic hazards for the target sites are evaluated in the case where the four kind of seismic source models are considered. Moreover, the PSHA for Wolsung and Younggwang are conducted by using the site-specific attenuation equation with the index of response spectra and the uniform hazard spectra are evaluated for the two sites. The supporting tool for seismic response analysis and the evaluation tool for evaluating annual probability of failure were integrated in the frame of the seismic risk assessment system. Then, the tools were applied to the seismic risk assessment of the conventional EDG and isolated EDG. General information such as earthquake parameters and regional distribution of seismic intensity is summarized on the 2005 West Off Fukuoka earthquake. Then, the observed strong motion records in Japan and Korea sites are compiled, and regional distribution of peak accelerations are represented. Moreover, the peak accelerations of the records are compared with the values estimated from the existing attenuation equations.

  4. Evaluation Strategy

    DEFF Research Database (Denmark)

    Coto Chotto, Mayela; Wentzer, Helle; Dirckinck-Holmfeld, Lone

    2009-01-01

    The paper presents an evaluation strategy based on deliberate ideals and principles of dialogue design. The evaluation strategy is based on experiential phenomenology taking the point of departure for design and evaluation processes in the experienced practitioners themselves. The article presents...... the evaluation strategy and methodology of a research project Making Online Path to Enter new Markets, MOPEM. It is an EU-research project with partners from different Educational Institutions of Technology and Business in five European Countries....

  5. Is the Kinect system suitable for evaluation of the hip joint range of motion and as a screening tool for femoroacetabular impingement (FAI)?

    Science.gov (United States)

    Lahner, Matthias; Mußhoff, Dennis; von Schulze Pellengahr, Christoph; Willburger, Roland; Hagen, Marco; Ficklscherer, Andreas; von Engelhardt, Lars Victor; Ackermann, Ole; Lahner, Nina; Vetter, Gregor

    2015-01-01

    In the clinical evaluation of femoroacetabular impingement (FAI), there is a lack of quantitative, reliable and informative assessment methods for the overall functional capability of an individual. We compared clinical and radiological measurements of the hip joint with a new methodology based on the concept of 3-dimensional reachable workspace using Microsoft Kinect. We assessed the correlation between the alpha angle of Nötzli on full-length radiographs and the clinical internal rotation. We evaluated the accuracy of joint positions and angles of the hip between the Kinect system and clinical examination including range of motion (ROM). The results of our clinical trial with 24 study participants showed a significant difference between normal internal rotation (> 21°) and reduced internal rotation (⩽ 21°) in comparison to the radiological alpha angle of Nötzli (P=0.026). The acquired reachable Kinect data demonstrated a moderate agreement between the Kinect and clinical examination (correlation coefficients between 0.230 and 0.375). The findings suggest that a higher grade alpha angle of Nötzli accompanies reduced clinical internal rotation. The Kinect system provides reliable results of hip ROM. However, further test series must be performed for the application of Kinect in the clinical evaluation of FAI.

  6. Temperature and Humidity Profiles in the TqJoint Data Group of AIRS Version 6 Product for the Climate Model Evaluation

    Science.gov (United States)

    Ding, Feng; Fang, Fan; Hearty, Thomas J.; Theobald, Michael; Vollmer, Bruce; Lynnes, Christopher

    2014-01-01

    The Atmospheric Infrared Sounder (AIRS) mission is entering its 13th year of global observations of the atmospheric state, including temperature and humidity profiles, outgoing long-wave radiation, cloud properties, and trace gases. Thus AIRS data have been widely used, among other things, for short-term climate research and observational component for model evaluation. One instance is the fifth phase of the Coupled Model Intercomparison Project (CMIP5) which uses AIRS version 5 data in the climate model evaluation. The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) is the home of processing, archiving, and distribution services for data from the AIRS mission. The GES DISC, in collaboration with the AIRS Project, released data from the version 6 algorithm in early 2013. The new algorithm represents a significant improvement over previous versions in terms of greater stability, yield, and quality of products. The ongoing Earth System Grid for next generation climate model research project, a collaborative effort of GES DISC and NASA JPL, will bring temperature and humidity profiles from AIRS version 6. The AIRS version 6 product adds a new "TqJoint" data group, which contains data for a common set of observations across water vapor and temperature at all atmospheric levels and is suitable for climate process studies. How different may the monthly temperature and humidity profiles in "TqJoint" group be from the "Standard" group where temperature and water vapor are not always valid at the same time? This study aims to answer the question by comprehensively comparing the temperature and humidity profiles from the "TqJoint" group and the "Standard" group. The comparison includes mean differences at different levels globally and over land and ocean. We are also working on examining the sampling differences between the "TqJoint" and "Standard" group using MERRA data.

  7. Development and evaluation of a novel ultrasound score for large joints in rheumatoid arthritis: one year of experience in daily clinical practice.

    Science.gov (United States)

    Hartung, Wolfgang; Kellner, Herbert; Strunk, Johannes; Sattler, Horst; Schmidt, Wolfgang A; Ehrenstein, Boris; Fleck, Martin; Backhaus, Marina

    2012-05-01

    To introduce and evaluate a new standardized ultrasound (US) score developed for large joints in patients with rheumatoid arthritis (RA). A US score was designed to determine the degree of inflammation in the shoulder, the elbow, the hip, and the knee joint in patients with RA (Sonography of Large Joints in Rheumatology [SOLAR] score). Synovitis and synovial vascularity were scored semiquantitatively (grade 0-3) by gray-scale US (GSUS) and power Doppler US (PDUS). Patients with RA were examined at baseline and 3, 6, and 12 months after initiation of local or systemic therapy (disease-modifying antirheumatic drugs [DMARDs]/biologic agents). Erythrocyte sedimentation rate, anti-cyclic citrullinated peptide antibodies, and the clinical Disease Activity Score in 28 joints (DAS28) were determined. A cohort of 199 patients were analyzed and followed up over 12 months. At baseline, before modification of the therapy, patients received either DMARDs (n = 131), DMARDs plus biologic agents (n = 46), biologic monotherapy (n = 8), or no DMARD therapy (n = 14). At baseline, the mean DAS28 score was 4.6 and decreased to 3.2 after 1 year of therapy (P hip. In detail, the mean synovitis GSUS score for the knee decreased from 5.2 at baseline to 2.2 after 12 months of followup. The mean GSUS score for the shoulder fell from 2.6 to 1.6, for the elbow fell from 5.2 to 2.6, and for the hip fell from 2.2 to 0.4 (P joint involvement in patients with RA using US. Copyright © 2012 by the American College of Rheumatology.

  8. Evaluation of Night Vision Goggles (NVG) for Maritime Search and Rescue (Joint Canadian/U.S. Coast Guard Experiment)

    Science.gov (United States)

    1991-11-01

    Connecticut, Point Judith, Rhode Island, and Montauk , New York; and onboard a U.S. Coast Guard cutter and a Canadian Coast Guard ship. Data were collected...Hover, G. L. and Exley, S. A. Evaluation of SYSTAT Software for Application to 3 POD/SAR Projet . A&T Memorandum to LT William Reynolds, 31 October

  9. The use of pseudo-dynamic magnetic resonance imaging for evaluating the relationship between temporomandibular joint anterior disc displacement and joint pain.

    Science.gov (United States)

    Lin, W-C; Lo, C-P; Chiang, I-C; Hsu, C-C; Hsu, W-L; Liu, D-W; Juan, Y-H; Liu, G-C

    2012-12-01

    The relationship between temporomandibular joint (TMJ) pain and the magnetic resonance imaging (MRI) finding of articular disc displacement is debated. The purpose of this study is to investigate the correlation between TMJ pain and anterior disc displacement (ADD) using pseudo-dynamic MRI. A retrospective review of MRI studies was carried out on 130 TMJs in 65 patients presenting unilateral TMJ pain. The contralateral asymptomatic joints served as the control group. Bilateral oblique sagittal and coronal MRIs as well as pseudo-dynamic studies in the oblique sagittal plane were obtained. The disc-condyle relationship was divided into three subtypes (normal disc position, ADD with reduction, and ADD without reduction), based on the pseudo-dynamic MRI findings. Fisher's exact test was used to determine whether the TMJ pain was linked to ADD. The results showed that TMJ pain was significantly related to ADD (with and without reduction) compared to the group with a normal disc position (P=.0001). A significant correlation was found between TMJ pain and the ADD subtype without reduction, as compared to the ADD subtype with reduction (P=.0156). These data suggest that a displaced disc, particularly in the subtype without reduction, is an important source of pain. Copyright © 2012 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  10. Evaluation of the Long-Term Durability of Joints Cut Using Early Entry Saws on Rigid Pavements

    Science.gov (United States)

    2011-01-01

    Early-entry sawing is an attractive operation to expedite the construction of jointed concrete pavements; however, : there are some concerns that the early-entry sawing may compromise the pavements long-term performance. The Illinois : Department ...

  11. Evaluation of the mechanism and principles of management of temporomandibular joint dislocation. Systematic review of literature and a proposed new classification of temporomandibular joint dislocation.

    Science.gov (United States)

    Akinbami, Babatunde O

    2011-06-15

    Virtually all the articles in literature addressed only a specific type of dislocation. The aim of this review was to project a comprehensive understanding of the pathologic processes and management of all types of dislodgement of the head of the mandibular condyle from its normal position in the glenoid fossa. In addition, a new classification of temporomandibular joint dislocation was also proposed. A thorough computer literature search was done using the Medline, Cochrane library and Embase database. Key words like temporo-mandibular joint dislocation were used for the search. Additional manual search was done by going through published home-based and foreign articles. Case reports/series, and original articles that documented the type of dislocation, number of cases treated in the series and original articles. Treatment done and outcome of treatment were included in the study. A total of 128 articles were reviewed out which 79 were found relevant. Of these, 26 were case reports, 17 were case series and 36 were original articles. 79 cases were acute dislocations, 35 cases were chronic protracted TMJ dislocations and 311 cases were chronic recurrent TMJ dislocations. Etiology was predominantly trauma in 60% of cases and other causes contributed about 40%. Of all the cases reviewed, only 4 were unilateral dislocation. Various treatment modalities are outlined in this report as indicated for each type of dislocation. The more complex and invasive method of treatment may not necessarily offer the best option and outcome of treatment, therefore conservative approaches should be exhausted and utilized appropriately before adopting the more invasive surgical techniques.

  12. Avulsion of the greater trochanter and craniodorsal luxation of the hip joint in a cat: importance of precise radiographic evaluation.

    Science.gov (United States)

    Pinna, S; Cella, V

    2014-01-01

    A traumatic coxofemoral luxation was diagnosed in a 15-month-old European neutered male cat, and on the basis of the radiographic evaluation a closed reduction was performed. Consequently, the cat was presented at the University of Bologna because of the failure of the treatment. A supplementary radiographic exam revealed the concomitant avulsion of the greater trochanter, consequently surgical management of the coxofemoral luxation was attempted successfully. Therefore, correct planning of the radiographic examination should be considered to prevent possible mistakes.

  13. Evaluation of mechanical vibration effect on the residual stresses levels in steel welded joints using an Interface Matlab based on Norm API 579

    Directory of Open Access Journals (Sweden)

    R Rodrigues

    2016-10-01

    Full Text Available Nowadays with the high growth of petrochemical welding technology a great development due to high manufacturing offshore structures, storage tanks of petroleum, boilers and pressure vessels for refining plants have been done. Due to various metallurgical changes and restrictions to contraction and expansion undergone by materials when subjected to welding thermal cycle, internal stresses are generated in welded joint which are nominated residual stresses. It is generally undesirable because it can lead to several problems, such as cracks, cold stress fracture, stress corrosion, among others. Although several studies involving residual stresses have been developed in recent years, few information about the variation of the residual stresses level in welded joints when subjected to stress relief treatment by mechanical vibration have been done. Likewise, there are few information related to the comparison between the degree of efficiency by using the post-weld heat treatment and those treatment. Therefore, the goal of this work was to apply the relieve residual stresses treatment by mechanical vibration in steel welded joints used in oil industry, and compare the results with those obtained by post heat treatment and evaluate the efficiency level of this technique In addition, this works also hope to contribute for a better understanding of this technique and to find which parameters have a greater influence on the results.

  14. Evaluation of orthognathic surgery on articular disc position and temporomandibular joint symptoms in skeletal class II patients: A Magnetic Resonance Imaging study

    Science.gov (United States)

    Firoozei, Gholamreza; Shahnaseri, Shirin; Momeni, Hasan

    2017-01-01

    Background The purpose of orthognathic surgery is to correct facial deformity and dental malocclusion and to obtain normal orofacial function. However, there are controversies of whether orthognathic surgery might have any negative influence on temporomandibular (TM) joint. The purpose of this study was to evaluate the influence of orthognathic surgery on articular disc position and temporomandibular joint symptoms of skeletal CI II patients by means of magnetic resonance imaging. Material and Methods For this purpose, fifteen patients with skeletal CI II malocclusion, aged 19-32 years (mean 23 years), 10 women and 5 men, from the Isfahan Department of Oral and Maxillofacial Surgery were studied. All received LeFort I and bilateral sagittal split osteotomy (BSSO) osteotomies and all patients received pre- and post-surgical orthodontic treatment. Magnetic resonance imaging was performed 1 day preoperatively and 3 month postoperatively. Descriptive statistics and Wilcoxon and Mc-Nemar tests were used for statistical analysis. Psurgery (mean=5.74±1.21). After surgery disc position range was 4.36 to 7.40 (mean=5.65±1.06). Statistical analysis proved that although TM disc tended to move anteriorly after BSSO surgery, this difference was not statistically significant (p valueorthognathic surgery does not alter the disc and condyle relationship. Therefore, it has minimal effects on intact and functional TM joint. Key words:Orthognathic surgery, skeletal class 2, magnetic resonance imaging, temporomandibular disc. PMID:28936287

  15. An evaluation of the spring finger solder joints on SA1358-10 and SA2052-4 connector assemblies (MC3617,W87).

    Energy Technology Data Exchange (ETDEWEB)

    Kilgo, Alice C.; Vianco, Paul Thomas; Hlava, Paul Frank; Zender, Gary L.

    2006-08-01

    The SA1358-10 and SA2052-4 circular JT Type plug connectors are used on a number of nuclear weapons and Joint Test Assembly (JTA) systems. Prototype units were evaluated for the following specific defects associated with the 95Sn-5Sb (Sn-Sb, wt.%) solder joint used to attach the beryllium-copper (BeCu) spring fingers to the aluminum (Al) connector shell: (1) extended cracking within the fillet; (2) remelting of the solder joint during the follow-on, soldering step that attached the EMR adapter ring to the connector shell (and/or soldering the EMR shell to the adapter ring) that used the lower melting temperature 63Sn-37Pb (Sn-Pb) alloy; and (3) spalling of the Cd (Cr) layer overplating layer from the fillet surface. Several pedigrees of connectors were evaluated, which represented older fielded units as well as those assemblies that were recently constructed at Kansas City Plant. The solder joints were evaluated that were in place on connectors made with the current soldering process as well as an alternative induction soldering process for attaching the EMR adapter ring to the shell. Very similar observations were made, which crossed the different pedigrees of parts and processes. The extent of cracking in the top side fillets varied between the different connector samples and likely the EMR adapter ring to the shell. Very similar observations were made, which crossed the different pedigrees of parts and processes. The extent of cracking in the top side fillets varied between the different connector samples and likely reflected the different extents to which the connector was mated to its counterpart assembly. In all cases, the spring finger solder joints on the SA1358-10 connectors were remelted as a result of the subsequent EMR adapter ring attachment process. Spalling of the Cd (Cr) overplating layer was also observed for these connectors, which was a consequence of the remelting activity. On the other hand, the SA2052-4 connector did not exhibit evidence of

  16. Cadaveric Evaluation of Dorsal Intermetatarsal Approach for Plantar Plate and Lateral Collateral Ligament Repair of the Lesser Metatarsophalangeal Joints.

    Science.gov (United States)

    Phisitkul, Phinit; Hosuru Siddappa, Vinay; Sittapairoj, Tinnart; Goetz, Jessica E; Den Hartog, Bryan D; Femino, John E

    2017-07-01

    Access to the plantar plate has been described using either a plantar approach or an extensive dorsal approach that required complete joint destabilization and often a metatarsal osteotomy. Clinical scenarios related to plantar plate tear vary and the pathologies in early stages are frequently limited to unilateral soft tissue structures; a less invasive operative approach may be possible. A novel approach requiring a release of only the lateral collateral ligament and the lateral half of the plantar plate is presented in this cadaver model; the extent of joint exposure possible is described. The ability to place a secure suture through the lateral collateral ligament and the plantar plate was analyzed. Nine fresh-frozen cadaveric specimens were dissected in a randomized fashion across the second to fourth metatarsophalangeal joints through the intermetatarsal space dorsally. Under distraction, soft tissue was sequentially released, including dorsal capsule, lateral collateral ligament, and the lateral half of the plantar plate. Integrity of the extensor tendons, deep transverse intermetatarsal ligament, proximal attachment of the plantar plate, and osseous structures was carefully preserved. The joint exposure was quantified after each step with sizing rods. Using a suture passer, 2-0 nonabsorbable braided sutures were passed into the lateral collateral ligament and the plantar plate, and the construct strength was measured using a tensiometer. Progressive increase in mean joint exposure was noted after each step of soft tissue release with the final exposure of 6 mm after release of the lateral half of the plantar plate. Joint exposures after a capsulotomy and a lateral collateral release were 3 mm and 4 mm, respectively. Under distraction, the unilateral release of soft tissue created a lateral opening of the joint while the proximal phalangeal base adducted and medially deviated. Successful suture passage was noted in all specimens that could sustain a minimum

  17. Computer-based measurements of joint space analysis using metacarpal morphometry in hand radiograph for evaluation of rheumatoid arthritis.

    Science.gov (United States)

    Snekhalatha, U; Anburajan, M

    2017-09-01

    The aim and objectives are as follows: (i) to perform an automated segmentation of the hand from radiographs using a dual tree complex wavelet-based watershed algorithm; ii) to compare the measured statistical features of the joint space of the hand using gray level co-occurrence matrix (GLCM) method with standard diagnostic parameters of rheumatoid arthritis (RA). Fifty-three patients with RA and 17 age- and sex-matched healthy controls were included in the study. The erythrocyte sedimentation rate (ESR), C-reactive protein, rheumatoid factor, health assessment questionnaire score (HAQ), disease activity score (DAS) and hand radiographs of all the subjects were obtained. Joint space width and cortical thickness were measured in metacarpophalangeal joints (MCP) and metacarpal bone semi-automatically using MIMICS software. Dual tree complex wavelet transform-based watershed algorithm was applied for automated segmentation, and feature extraction was performed using the GLCM method in hand radiographs of the total population. In the RA group (n = 53), the joint space width measured in the MCP1, MCP3, MCP5 of the hand were reduced significantly (P measured combined cortical thickness at the second, third and fourth metacarpal bones of the hand were reduced significantly (P measured statistical features at MCP3 hand joint in the total population studied. © 2015 Asia Pacific League of Associations for Rheumatology and Wiley Publishing Asia Pty Ltd.

  18. Finite element model-based evaluation of tissue stress variations to fabricate corrective orthosis in feet with neutral subtalar joint.

    Science.gov (United States)

    Paul, Sathish; Vijayakumar, Rekha; Mathew, Lazar; Sivarasu, Sudesh

    2017-04-01

    The subtalar joint position during static stance is a crucial determinant of the peak plantar pressures and forms ideal reference point for any intervention in foot-related problems for leprosy-affected patients. The study pursued the hypothesis through a three-dimensional model that stress will be minimal in the distal joints of the foot when the subtalar joint is in neutral static stance position. Finite element model. The computed tomography images of the feet for five patients suffering from Hansen's disease having no muscle weakness and joint restriction were acquired. The gray intensities corresponding to the bones of the foot from the computed tomography images were three-dimensionally reconstructed. The three-dimensional model of the human foot, incorporating the realistic geometry, and the material properties of the hard tissues were then analyzed using a finite element solver for the stress distribution on bones of the foot. The results demonstrate that the position of the calcaneum in the static stance position does contribute to the varying stress in the foot. The stresses in the bones of the foot are minimal while the subtalar is in neutral position; this position will be suitable for foot orthotic fabrication. Clinical relevance The clinicians, therapists, and podiatrists having less engineering skills can quickly assess the patient and get optimal results on the stress associated with the joints of the foot.

  19. Evaluation of low signal intensity in the posterior disc attachment of the temporomandibular joint on T1-weighted magnetic resonance imaging

    Energy Technology Data Exchange (ETDEWEB)

    Chiba, Masatoshi; Echigo, Seishi [Tohoku Univ., Sendai (Japan). School of Dentistry; Kumagai, Masahiro; Takahashi, Tetsu; Nagai, Hirokazu; Kochi, Shoko

    1996-04-01

    The posterior disc attachment (PA) of the temporomandibular joint (TMJ) has relatively high signal intensity on T1-weighted or proton density-weighted magnetic resonance imaging (MRI). Sometimes, however, low signal intensity of the PA is observed in patients with chronic disc displacement. On the basis of previous histopathological studies, the areas of low signal intensity in the PA may be consistent with pseudodisc formation associated with fibrous metaplasia of the PA. The purpose of this study was to evaluate the relations between MR signal intensity of the PA and MRI findings, including the degree of disc displacement, disc reduction, disc shape, bone change, and condylar translation, as well as clinical findings, including the duration of symptoms, joint pain, and range of motion. The study was based on MRI of 216 TMJ in 184 patients with anterior disc displacement. The sagittal closed-mouth T1-weighted SE images were used to determine the presence or absence of low signal intensity in the PA. Low signal intensity in the PA was seen in 33 joints in 32 patients (15.3%). The incidence of low signal intensity was significantly higher in males (27.8%) than in females (12.8%). No statistical difference was found between anterior disc displacement with reduction (10.5%), anterior disc displacement without reduction (21.5%), and anterior disc displacement without reduction with osteoarthrosis (14.3%). Low signal intensity in the PA was seen only in moderate or severe disc displacement. Low signal intensity in the PA was not associated with specific clinical or MRI findings except for the degree of disc displacement. In conclusion, low signal intensity in the PA is directly correlated with disc displacement, and there was no apparent correlation with clinical findings. Low signal intensity of the PA is not necessarily related to adaptation of the joint in disc displacement. (author).

  20. Preventive lateral ligament tester (PLLT): a novel method to evaluate mechanical properties of lateral ankle joint ligaments in the intact ankle.

    Science.gov (United States)

    Best, Raymond; Böhle, Caroline; Mauch, Frieder; Brüggemann, Peter G

    2016-04-01

    To construct and evaluate an ankle arthrometer that registers inversion joint deflection at standardized inversion loads and that, moreover, allows conclusions about the mechanical strain of intact ankle joint ligaments at these loads. Twelve healthy ankles and 12 lower limb cadaver specimens were tested in a self-developed measuring device monitoring passive ankle inversion movement (Inv-ROM) at standardized application of inversion loads of 5, 10 and 15 N. To adjust in vivo and in vitro conditions, the muscular inactivity of the evertor muscles was assured by EMG in vivo. Preliminary, test-retest and trial-to-trial reliabilities were tested in vivo. To detect lateral ligament strain, the cadaveric calcaneofibular ligament was instrumented with a buckle transducer. After post-test harvesting of the ligament with its bony attachments, previously obtained resistance strain gauge results were then transferred to tensile loads, mounting the specimens with their buckle transducers into a hydraulic material testing machine. ICC reliability considering the Inv-ROM and torsional stiffness varied between 0.80 and 0.90. Inv-ROM ranged from 15.3° (±7.3°) at 5 N to 28.3° (±7.6) at 15 N. The different tests revealed a CFL tensile load of 31.9 (±14.0) N at 5 N, 51.0 (±15.8) at 10 N and 75.4 (±21.3) N at 15 N inversion load. A highly reliable arthrometer was constructed allowing not only the accurate detection of passive joint deflections at standardized inversion loads but also reveals some objective conclusions of the intact CFL properties in correlation with the individual inversion deflections. The detection of individual joint deflections at predefined loads in correlation with the knowledge of tensile ligament loads in the future could enable more individual preventive measures, e.g., in high-level athletes.

  1. Design and Kinematic Evaluation of a Novel Joint-Specific Play Controller: Application for Wrist and Forearm Therapy.

    Science.gov (United States)

    Crisco, Joseph J; Schwartz, Joel B; Wilcox, Bethany; Costa, Laura; Kerman, Karen

    2015-07-01

    The wrist extensors and flexors are profoundly affected in most children with hemiparetic cerebral palsy (CP) and are the major target of physical therapists' and occupational therapists' efforts to restore useful hand functions. A limitation of any therapeutic or exercise program can be the level of the child's engagement or adherence. The proposed approach capitalizes on the primary learning avenue for children: toy play. This study aimed to develop and evaluate the measurement accuracy of innovative, motion-specific play controllers that are engaging rehabilitative devices for enhancing therapy and promoting neural plasticity and functional recovery in children with CP. Design objectives of the play controller included a cost-effective, home-based supplement to physical therapy, the ability to calibrate the controller so that play can be accomplished with any active range of motion, and the capability of logging play activity and wrist motion over week-long periods. Accuracy of the play controller in measuring wrist flexion-extension was evaluated in 6 children who were developing in a typical manner, using optical motion capture of the wrist and forearm as the gold standard. The error of the play controller was estimated at approximately 5 degrees in both maximum wrist flexion and extension. Measurements were taken during a laboratory session, with children without CP, and no toy or computer game was interfaced with the play controller. Therefore, the potential engagement of the proposed approach for therapy remains to be evaluated. This study presented the concept, development, and wrist tracking accuracy of an inexpensive approach to extremity therapy that may have a health benefit for children with hemiparesis, and potentially for patients of any age with a wide range of extremity neuromotor impairments. © 2015 American Physical Therapy Association.

  2. Nondestructive evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Martz, H.E.

    1997-02-01

    Research reported in the thrust area of nondestructive evaluation includes: advanced 3-D imaging technologies; new techniques in laser ultrasonic testing; infrared computed tomography for thermal NDE of materials, structures, sources, and processes; automated defect detection for large laser optics; multistatic micropower impulse radar imaging for nondestructive evaluation; and multi-modal NDE for AVLIS pod shielding components.

  3. Board Evaluations

    OpenAIRE

    Pierce, Chris; Larson, Mary Jo

    2015-01-01

    Board evaluation has emerged as a corporate governance priority and brought to the forefront many associated challenges. This is not a revolutionary change. Board assessment procedures are evolving as nations and companies formulate and test diverse requirements. Until recently effective Board evaluation was not regarded a Board priority. In 2002, Yale University Professor Jeffrey Sonnenfe...

  4. High resolution ultrasonography and magnetic resonance imaging in the evaluation of tendino-ligamentous injuries around ankle joint

    Directory of Open Access Journals (Sweden)

    Nevien El-Liethy

    2016-06-01

    Conclusion: US is an excellent tool for imaging soft tissue abnormalities, as it allows rapid, in-expensive detailed examination of the structures of the ankle joint. US and MRI are two complementary tools of investigation with the former being used as primary effective tool of investigation and the latter is done to confirm the diagnosis.

  5. EVALUATION OF TEMPOROMANDIBULAR-JOINT PROSTHESES - REVIEW OF THE LITERATURE FROM 1946 TO 1994 AND IMPLICATIONS FOR FUTURE PROSTHESIS DESIGNS

    NARCIS (Netherlands)

    VANLOON, JP; DEBONT, LGM; BOERING, G

    Purpose: This article describes the useful elements of applied temporomandibular joint (TMJ) prostheses and discusses the factors necessary to be addressed in an appropriate TMJ prosthesis design. Materials and Methods: Information about TMJ prostheses was gathered by a literature search, Only

  6. Experimental evaluation of the buckling phenomena in the new joint design for upper deck structure of a bridge

    Directory of Open Access Journals (Sweden)

    Solazzi L.

    2010-06-01

    Full Text Available This paper is concerned with the experimental mechanical analysis of a new design of a joint for a main components of a upper deck of a road bridge. These components are subject to the compression state stress induced by the weight and the load acting on the road. Each upper deck of a bridge (positioned on each side of the bridge is composed by four tubular structures that must be joint each together. The joint must to take in to account many aspects, for example that the length of each component is not the same (because, obviously, there is a mechanical tolerance. This phenomena induce different compression stress on each component and so is very important non only the critical buckling load but also the post buckling behaviour of the structure. It is very important that if a single tubular structure reaches the critical load of instability, it still has load capacity . This is to avoid that, in the case where a column reaches the instability, the entire load acting on a column increase the load on the remaining three. For this purpose many different geometrical solutions have been designed (elaborated by fem analyses and successively tested experimentally. This work reports the main experimental results on the best joint solution and how this increase the load capacity and the displacement respect to the solution without this flange.

  7. DEVELOPMENT OF AN APPROXIMATE MULTIVARIATE TWO-STEP APPROACH FOR THE JOINT GENETIC EVALUATION OF AUSTRIAN AND GERMAN DAIRY CATTLE

    Directory of Open Access Journals (Sweden)

    Christina Pfeiffer

    2015-09-01

    Full Text Available Multivariate genetic evaluation in modern dairy cattle breeding programs became important in the last decades. The simultaneous estimation of all production and functional traits is still demanding. Different meta-models are used to overcome several constraints. The aim of this study was to conduct an approximate multivariate two-step procedure applied to de-regressed breeding values and yield deviations of five fertility traits of Austrian Pinzgau cattle and to compare results with routinely estimated breeding values. The approximate two-step procedure applied to de-regressed breeding values performed better than the procedure applied to yield deviations. Spearman rank correlations for all animals, sires and cows were between 0.996 and 0.999 for the procedure applied to de-regressed breeding values and between 0.866 and 0.995 for the procedure applied to yield deviations. The results are encouraging to move from the currently used selection index in routine genetic evaluation towards an approximate two-step procedure applied to de-regressed breeding values.

  8. Dynamic Evaluation of the Contact Characteristics and Three-Dimensional Motion for the Ankle Joint with Lateral Ligament Injuries

    Science.gov (United States)

    Kawakami, Kensaku; Omori, Go; Terashima, Shojiro; Sakamoto, Makoto; Hara, Toshiaki

    The purpose of this study was to clarify the dynamic changes in contact pressure distribution and three-dimensional ankle joint motion before and after lateral ligament injuries. Five fresh and frozen intact cadaveric ankles were examined. Each ankle was mounted on a specially designed frame that preserved five degrees of freedom motion. The direct linear transformation technique was used to measure the three-dimensional ankle motion, and a pressure-sensitive conductive rubber sensor was inserted into the talocrural joint space to determine the contact pressure distribution. The contact area on the talus for intact ankle moved anteriorly and laterally with increasing dorsiflexion. An area of high pressure was observed in the medial aspect of the articular surface after the ligament was cut. Supination significantly increased after a combined anterior talofibular ligament (ATF) and calcaneofibular ligament (CF) were cut in comparison with after only an ATF was cut, and no significant differences were observed in motional properties under each experimental condition.

  9. Performance Evaluation of Waterproofing Membrane Systems Subject to the Concrete Joint Load Behavior of Below-Grade Concrete Structures

    OpenAIRE

    Jaeyoung Song; Kyuhwan Oh; Byoungil Kim; Sangkeun Oh

    2017-01-01

    Below-grade structures such as parking lots, underground subway tunnels, and basements are growing in scale and reaching deeper below-ground levels. In this type of environment, they become subject to higher water pressure. The concrete material of the structures is exposed to wet conditions for longer periods of time, which makes the proper adhesion of waterproofing membranes difficult. Joint movements from increased structural settlement, thermal expansion/shrinkage, and physical loads from...

  10. Evaluation of meniscus displacement of the temporomandibular joint by MR imaging. Correlation with clinical symptoms of TMJ disorders

    Energy Technology Data Exchange (ETDEWEB)

    Toyoda, Nagataka; Asada, Koichi; Naohara, Hiroaki; Jibiki, Masato; Ishibashi, Katsunori; Kobayashi, Kaoru [Tsurumi Univ., Yokohama (Japan). School of Dental Medicine

    1996-04-01

    MR imaging is useful in the diagnosis of bilateral internal derangement of the temporomandibular joint. This study was performed to investigate the correlation between clinical symptoms and displacement of the bilateral articular disk in patients with temporomandibular joint disorders (TMJD). A series of 170 patients who had signs and symptoms of TMJDs (TMJ pain, TMJ sound, trismus) were examined bilaterally by MR imaging. One hundred twenty-six patients had only unilateral symptoms, but 55 (44%) of them showed bilateral disk displacement. Among 93 patients with unilateral TMJ pain, 89% showed disk displacement (22 TMJs with reduction, 61 TMJs without reduction) on the symptomatic side, and 44% showed disk displacement on the asymptomatic side. Among 53 patients with unilateral TMJ sound, 96% showed disk displacement (28 TMJs with reduction, 23 TMJs without reduction) on the symptomatic side, and 53% showed disk displacement on the asymptomatic side. In patients with severe trismus (interincisal opening distance <39 mm), unilateral or bilateral disk displacement without reduction was frequently found. The results indicate that examinations by MR imaging are important for the diagnosis of internal derangement of the temporomandibular joint. (author).

  11. CT evaluation of native acetabular orientation and localization: sex-specific data comparison on 336 hip joints.

    Science.gov (United States)

    Tohtz, Stephan W; Sassy, Danny; Matziolis, Georg; Preininger, Bernd; Perka, Carsten; Hasart, Olaf

    2010-01-01

    The reorientation of the acetabular component in total hip replacement is currently carried out under consideration of the safe zone, respecting the best possible range of motion and is influenced by wear debris of different bearings. Is the preferred orientation a reconstruction of the native anatomy and are there sex-specific differences? On the basis of 168 CT datasets (72 women, 96 men) 336 native hip joints were analysed. The abduction and anteversion of the acetabulum as well as the location of the hip center were detected. As a reference the anterior pelvic plane was used. The 144 female hip joints showed a mean abduction of 53.0 degrees (SD 6.14 degrees ) and an anteversion of 24.63 degrees (SD 6.61 degrees ). The 192 male hip joints showed an abduction of 53.58 degrees (SD 6.68 degrees ) and an anteversion of 21.31 degrees (SD 6.17 degrees ). Significant differences were observed on comparison between the sexes in relation to the anteversion and the location of the hip center. Likewise, there was a significant correlation between the position of the hip center and the degree of anteversion. In total hip arthroplasty a reconstruction of the native acetabular orientation is not possible, gender specific characteristics should be considered.

  12. Evaluation of Artificial Caudal Fin for Fish Robot with Two Joints by Using Three-Dimensional Fluid-Structure Simulation

    Directory of Open Access Journals (Sweden)

    Yogo Takada

    2013-01-01

    Full Text Available A fish robot with image sensors is useful to research for underwater creatures such as fish. However, the propulsion velocity of a fish robot is very slow compared with live fish. It is necessary to swim at a speed several times faster than the speed of the current robots for various usages. Therefore, we are searching for the method of making the robot swim fast. The simulation before making the robot is important. We have made the computational simulation program of three-dimensional fluid-structure analysis. The flow around the caudal fin can be examined by analyzing the fin as an elastic body. We compared the results of numerical analysis with the results of PIV measurement. Both were agreed well. Because the performance of a fish robot with two joints is better than that of a fish robot with one joint, we searched for an excellent fin for the fish robot with two joints by using CFD. We confirmed that the swimming performance of a fish robot becomes very good when the caudal fin is rigid except for the root of the fin which is comparatively flexible.

  13. A comparative evaluation of low-cycle fatigue behavior of type 316LN base metal, 316 weld metal, and 316LN/316 weld joint

    Science.gov (United States)

    Valsan, M.; Sundararaman, D.; Rao, K. Bhanu Sankara; Mannan, S. L.

    1995-05-01

    A comparative evaluation of the low-cycle fatigue (LCF) behavior of type 316LN base metal, 316 weld metal, and 316LN/316 weld joints was carried out at 773 and 873 K. Total strain-controlled LCF tests were conducted at a constant strain rate of 3 × 10-3 s-1 with strain amplitudes in the range ±0.20 to ±1.0 pct. Weld pads with single V and double V configuration were prepared by the shielded metal-arc welding (SMAW) process using 316 electrodes for weld-metal and weld-joint specimens. Optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) of the untested and tested samples were carried out to elucidate the deformation and the fracture behavior. The cyclic stress response of the base metal shows a very rapid hardening to a maximum stress followed by a saturated stress response. Weld metal undergoes a relatively short initial hardening followed by a gradual softening regime. Weld joints exhibit an initial hardening and a subsequent softening regime at all strain amplitudes, except at low strain amplitudes where a saturation regime is noticed. The initial hardening observed in base metal has been attributed to interaction between dislocations and solute atoms/complexes and cyclic saturation to saturation in the number density of slip bands. From TEM, the cyclic softening in weld metal was ascribed to the annihilation of dislocations during LCF. Type 316LN base metal exhibits better fatigue resistance than weld metal at 773 K, whereas the reverse holds true at 873 K. The weld joint shows the lowest life at both temperatures. The better fatigue resistance of weld metal is related to the brittle transformed delta ferrite structure and the high density of dislocations at the interface, which inhibits the growth rate of cracks by deflecting the crack path. The lower fatigue endurance of the weld joint was ascribed to the shortening of the crack initiation phase caused by surface intergranular crack initiation and to the poor

  14. Evaluative Infrastructures

    DEFF Research Database (Denmark)

    Kornberger, Martin; Pflueger, Dane; Mouritsen, Jan

    To date, much of the accounting literature focuses on control and coordination within and from the perspective of organizations, reflecting what Hopwood described as accounting’s “hierarchical consciousness”. Inspired by the growing phenomenon of network organizational forms such as eBay, AirBnB ...... worlds); and new forms of control (evaluative infrastructures are not centers of calculation; rather, control is radically distributed, whilst power remains centralized).......BnB or Uber, this paper develops the concept of evaluative infrastructures for a heterarchical modus of accounting. Evaluative infrastructures are decentralized accounting practices that underpin distributed production processes. They are evaluative because they deploy a plethora of interacting devices......, including rankings, ratings, reviews, audits etc. to establish orders of worth. They are infrastructures because they provide the invisible yet essential mechanisms for distributed production processes to occur. Put metaphorically, if cost accounting provided the numerical infrastructure...

  15. Staff evaluation.

    Science.gov (United States)

    Swartz, A J

    1979-02-01

    The necessity for evaluating hospital pharmacy department personnel, and the recognized methods for performing such evaluations, including their advantages and deficiencies, are reviewed. Performance appraisal systems using ranking, person-to-person comparison, grading, graphic scales, checklists, forced-choice description, selection of critical incidents and management by objectives (MBO) are detailed, with emphasis upon their use in hospital pharmacy departments. All of these systems, with the exception of MBO, place inappropriate emphasis upon various subjective personality trails while failing to include objective results attained by personnel. Most of these methods (again excepting MBO) deny the evaluate-manager the opportunity to coach staff members in an attempt to improve results achievement. Staff evaluation, when carried out under an MBO system, is more likely to provide the hospital pharmacy department and its director with improved staff performance and development.

  16. Stream Evaluation

    Data.gov (United States)

    Kansas Data Access and Support Center — Digital representation of the map accompanying the "Kansas stream and river fishery resource evaluation" (R.E. Moss and K. Brunson, 1981.U.S. Fish and Wildlife...

  17. Employee evaluation

    OpenAIRE

    Krausová, Petra

    2008-01-01

    The employee performance evaluation is one of the key activities in the current human resources management. It assists organization with valuable information, reports regarding work performance and a level of employee capability. Through such evaluation, the employees receive a feedback about their level of performance. This feedback helps to uncover their strength and areas of improvement as well perception by the organization about their efforts to meet the company goals. Therefore the work...

  18. Quantifying the uncertainty in estimates of surface–atmosphere fluxes through joint evaluation of the SEBS and SCOPE models

    Directory of Open Access Journals (Sweden)

    J. Timmermans

    2013-04-01

    Full Text Available Accurate estimation of global evapotranspiration is considered to be of great importance due to its key role in the terrestrial and atmospheric water budget. Global estimation of evapotranspiration on the basis of observational data can only be achieved by using remote sensing. Several algorithms have been developed that are capable of estimating the daily evapotranspiration from remote sensing data. Evaluation of remote sensing algorithms in general is problematic because of differences in spatial and temporal resolutions between remote sensing observations and field measurements. This problem can be solved in part by using soil-vegetation-atmosphere transfer (SVAT models, because on the one hand these models provide evapotranspiration estimations also under cloudy conditions and on the other hand can scale between different temporal resolutions. In this paper, the Soil Canopy Observation, Photochemistry and Energy fluxes (SCOPE model is used for the evaluation of the Surface Energy Balance System (SEBS model. The calibrated SCOPE model was employed to simulate remote sensing observations and to act as a validation tool. The advantages of the SCOPE model in this validation are (a the temporal continuity of the data, and (b the possibility of comparing different components of the energy balance. The SCOPE model was run using data from a whole growth season of a maize crop. It is shown that the original SEBS algorithm produces large uncertainties in the turbulent flux estimations caused by parameterizations of the ground heat flux and sensible heat flux. In the original SEBS formulation the fractional vegetation cover is used to calculate the ground heat flux. As this variable saturates very fast for increasing leaf area index (LAI, the ground heat flux is underestimated. It is shown that a parameterization based on LAI reduces the estimation error over the season from RMSE = 25 W m−2 to RMSE = 18 W m−2. In the original SEBS formulation the

  19. [Evaluation of Artificial Hip Joint with Radiofrequency Heating Issues during MRI Examination: A Comparison between 1.5 T and 3 T].

    Science.gov (United States)

    Yamazaki, Masaru; Ideta, Takahiro; Kudo, Sadahiro; Nakazawa, Masami

    2016-06-01

    In magnetic resonance imaging (MRI), when radiofrequency (RF) is irradiated to a subject with metallic implant, it can generate heat by RF irradiation. Recently 3 T MRI scanner has spread widely and imaging for any regions of whole body has been conducted. However specific absorption rate (SAR) of 3 T MRI becomes approximately four times as much as the 1.5 T, which can significantly affect the heat generation of metallic implants. So, we evaluated RF heating of artificial hip joints in different shapes and materials in 1.5 T and 3 T MRI. Three types of artificial hip joints made of stainless alloy, titanium alloy and cobalt chrome alloy were embedded in the human body-equivalent phantom respectively and their temperature change were measured for twenty minutes by 1.5 T and 3 T MRI. The maximum temperature rise was observed at the bottom head in all of three types of artificial hip joints, the rise being 12°C for stainless alloy, 11.9°C for titanium alloy and 6.1°C for cobalt chrome alloy in 1.5 T. The temperature rise depended on SAR and the increase of SAR had a good linear relationship with the temperature rise. It was found from the result that the RF heating of metallic implants can take place in various kinds of material and the increase of SAR has a good linear relationship with the temperature rise. This experience shows that reduction of SAR can decrease temperature of metallic implants.

  20. Morphometric analysis for evaluating the relation between incisal guidance angle, occlusal plane angle, and functional temporomandibular joint shape variation.

    Science.gov (United States)

    Han, Seulgi; Shin, Sang Min; Choi, Yong-Seok; Kim, So Yeun; Ko, Ching-Chang; Kim, Yong-Il

    2018-01-11

    The correlations between morphology of the temporomandibular joint structure, the anterior guidance angle, and occlusal plane were investigated. A cone beam computed tomography analysis was performed in 158 patients (86 women and 72 men). 3D software was employed to obtain the coordinates of the shape of the incisal guidance angle, occlusal guidance angle, articular fossa, and mandibular condyle. Generalized Procrustes analysis including principal components analysis (PCA) were performed and produced principal components (PCs) scores of each shape and their centroid size (CS). A significant Pearson correlation coefficient of 0.3451 (p angle and occlusal plane. The CS also showed a correlation with the incisal guidance angle, but not with the occlusal plane angle. The PCA results revealed that there were no significant correlations between the temporomandibular joint structure (TMJ) shape (fossa and condyle) and the incisal guidance angle. Incisor guidance angle and occlusal plane angle were correlated. In addition, there was a correlation between CS and incisal guidance angle. In the PCA, It can be concluded that the size is more related to the incisor guidance angle than the morphological factors of the constituent components of the TMJ.

  1. Development and validation of a computational model of the knee joint for the evaluation of surgical treatments for osteoarthritis.

    Science.gov (United States)

    Mootanah, R; Imhauser, C W; Reisse, F; Carpanen, D; Walker, R W; Koff, M F; Lenhoff, M W; Rozbruch, S R; Fragomen, A T; Dewan, Z; Kirane, Y M; Cheah, K; Dowell, J K; Hillstrom, H J

    2014-01-01

    A three-dimensional (3D) knee joint computational model was developed and validated to predict knee joint contact forces and pressures for different degrees of malalignment. A 3D computational knee model was created from high-resolution radiological images to emulate passive sagittal rotation (full-extension to 65°-flexion) and weight acceptance. A cadaveric knee mounted on a six-degree-of-freedom robot was subjected to matching boundary and loading conditions. A ligament-tuning process minimised kinematic differences between the robotically loaded cadaver specimen and the finite element (FE) model. The model was validated by measured intra-articular force and pressure measurements. Percent full scale error between FE-predicted and in vitro-measured values in the medial and lateral compartments were 6.67% and 5.94%, respectively, for normalised peak pressure values, and 7.56% and 4.48%, respectively, for normalised force values. The knee model can accurately predict normalised intra-articular pressure and forces for different loading conditions and could be further developed for subject-specific surgical planning.

  2. SWOT analysis to evaluate the programme of a joint online/onsite master's degree in environmental education through the students' perceptions.

    Science.gov (United States)

    Romero-Gutierrez, Miguel; Jimenez-Liso, M Rut; Martinez-Chico, Maria

    2016-02-01

    This study shows the use of SWOT to analyse students' perceptions of an environmental education joint master's programme in order to determine if it runs as originally planned. The open answers given by students highlight the inter-university nature of the master's, the technological innovation used as major points, and the weaknesses in the management coordination or the duplicate contents as minor points. The external analysis is closely linked with the students' future jobs, their labour opportunities available to them after graduation. The innovative treatment of the data is exportable to the evaluation of programmes of other degrees because it allows the description linked to its characteristics and its design through the students' point of view. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. Evaluation of risk factors for degenerative joint disease associated with hip dysplasia in German Shepherd Dogs, Golden Retrievers, Labrador Retrievers, and Rottweilers.

    Science.gov (United States)

    Smith, G K; Mayhew, P D; Kapatkin, A S; McKelvie, P J; Shofer, F S; Gregor, T P

    2001-12-15

    To determine whether age, breed, sex, weight, or distraction index (DI) was associated with the risk that dogs of 4 common breeds (German Shepherd Dog, Golden Retriever, Labrador Retriever, Rottweiler) would have radiographic evidence of degenerative joint disease (DJD) associated with hip dysplasia. Cross-sectional prevalence study. 15,742 dogs. Hips of dogs were evaluated radiographically by use of the ventrodorsal hip-extended view, the compression v ew, and the distraction view. The ventrodorsal hip-extended view was examined to determine whether dogs had DJD. For each breed, a multiple logistic regression model incorporating age, sex, weight, and DI was created. For each breed, disease-susceptibility curves were produced, using all dogs, regardless of age, and dogs grouped on the basis of age. Weight and DI were significant risk factors for DJD in all breeds. For German Shepherd Dogs, the risk of having DJD was 4.95 times the risk for dogs of the other 3 breeds combined. In all breeds, the probability of having DJD increased with age. Results indicated that the probability of having hip DJD increased with hip joint laxity as measured by use of DI. This association was breed-specific, indicating that breed-specific information on disease susceptibility should be incorporated when making breeding decisions and when deciding on possible surgical treatment of hip dysplasia.

  4. Performance Evaluation of Nose Cap to Silica Tile Joint of RLV-TD under the Simulated Flight Environment using Plasma Wind Tunnel Facility

    Science.gov (United States)

    Pillai, Aravindakshan; Krishnaraj, K.; Sreenivas, N.; Nair, Praveen

    2017-12-01

    Indian Space Research Organisation, India has successfully flight tested the reusable launch vehicle through launching of a demonstration flight known as RLV-TD HEX mission. This mission has given a platform for exposing the thermal protection system to the real hypersonic flight thermal conditions and thereby validated the design. In this vehicle, the nose cap region is thermally protected by carbon-carbon followed by silica tiles with a gap in between them for thermal expansion. The gap is filled with silica fibre. Base material on which the C-C is placed is made of molybdenum. Silica tile with strain isolation pad is bonded to aluminium structure. These interfaces with a variety of materials are characterised with different coefficients of thermal expansion joined together. In order to evaluate and qualify this joint, model tests were carried out in Plasma Wind Tunnel facility under the simultaneous simulation of heat flux and shear levels as expected in flight. The thermal and flow parameters around the model are determined and made available for the thermal analysis using in-house CFD code. Two tests were carried out. The measured temperatures at different locations were benign in both these tests and the SiC coating on C-C and the interface were also intact. These tests essentially qualified the joint interface between C-C and molybdenum bracket and C-C to silica tile interface of RLV-TD.

  5. The computed tomographic evaluation of patellofemoral joint in patellar fractures treated with open reduction and internal fixation

    Energy Technology Data Exchange (ETDEWEB)

    Benli, I.T.; Akalin, S.; Mumcu, E.F.; Citak, M.; Kilic, M.; Pasaoglu, E. (Ankara Social Security Hospital (Turkey))

    1992-08-01

    In this study, we examined 97 patella fractures in which open reduction and internal fixation had been performed at the 1st Orthopaedics and Trauma Clinic of Social Security Ankara Hospital between January 1983 and December 1988. After 24 to 96 months, on an average of 48.4 months follow-up period, the cases were evaluated clinically for knee function complaints and by CT and roentgenography for patellofemoral articulation. In 11 of the patients (11.5%) there was patellar displacement, 2 of the patients had patellar tilt (2.1%) and in 14 patients (14.5%) there was malalignment in which 1 patient (1.1%) had both patellar tilt and displacement. This data was obtained by measuring femoral trochlear angle (FTA) and patellar tilt angle (PTA) by CT at various degrees of knee flexion. Thirty three patients (34%) had slight and 19 patients (19.6%) had severe degenerative changes in the patellofemoral articulation. It is found that there is close relation between the variability of the pain complaints of the patients and the type of the fracture and the time of management and the postoperative rehabilitation. (author).

  6. Evaluation of bone mechanical strenght and fracture risk assessment (Frax) in patients with hip joint replacement surgery.

    Science.gov (United States)

    Rodrigues, A; Caetano-Lopes, J; Nery, A; Sousa, E; Polido-Pereira, J; Vale, M; Amaral, P; Romeu, J C; Viana Queiroz, M; Monteiro, J; Vaz, M F; Fonseca, J E; Canhão, H

    2009-01-01

    Fracture risk assessment tools are useful to calculate the long term probability of osteoporotic fracture. However, how it reflects bone quality is unknown. The aim of this study was to correlate the WHO clinical fracture risk assessment tool, FRAX, with bone mechanical properties. Six patients submitted to hip replacement surgery, either due to osteoporotic fractures or to osteoarthritis, were evaluated. Bone samples were collected and the mechanical properties assessed by compression tests. Patients' data regarding the presence of clinical risk factors for fracture were registered. Laboratorial assessment of bone metabolic parameters and a dual X-ray absorptiometry(DXA) were done. Analysis of the load-displacement curves showed that patients with fragility fractures (n=4) had low values of elastic modulus, yield load and energy absorbed until yield point. Osteoarthritis patients tend to have a better biomechanical performance.Femoral neck DXA scan was also performed in 3 patients. Fragility fracture patients had a lower bone mineral density than the patients with osteoarthritis. FRAX algorithm was applied and a positive relation was found between FRAX results and biomechanical parameters. Blood bone metabolic markers were within the normal range for all the subjects. The worse mechanical properties observed in the fragility fracture patients were related to high probability of fracture given by FRAX. These observations, in a very small sample, need further confirmation. However, they suggest that the fracture risk assessment tool, FRAX, may reflect the current mechanical bone behavior of the patient.

  7. The Evaluation of Head and Craniocervical Posture among Patients with and without Temporomandibular Joint Disorders- A Comparative Study.

    Science.gov (United States)

    Saddu, Shweta Channavir; Dyasanoor, Sujatha; Valappila, Nidhin J; Ravi, Beena Varma

    2015-08-01

    Temporomandibular disorders (TMD) are the most common non-dental cause of orofacial pain with a multifactorial aetiology. To evaluate the head and craniocervical posture between individuals with and without TMD and its sub types by photographic and radiographic method. Thirty four TMD patients diagnosed according to Research Diagnostic Criteria for TMD's (RDC/TMD) and were divided into 2 groups: Group I (muscle disorder), Group II (disc displacement). Control group comprised of 34 age and sex matched subjects without TMD. Lateral view photographs were taken and the head posture angle was measured. Craniocervical posture was assessed on lateral skull radiograph with two angles (Craniocervical Angle, Cervical Curvature Angle) and two distances (Suboccipital Space, Atlas-Axis Distance). To compare the results, t-test was used with significance level of 0.05. Head posture showed no statistical significant difference (p > 0.05) between Group I, II and control group in both photographic and radiographic methods. The cervical curvature angle showed significant difference (p = 0.045) in Group I only. Atlas-Axis Distance was statistically significant in Group II (p = 0.001). The present study confirmed that there is a negative association of head posture and TMD whereas, cervical lordosis was present in Group I only.

  8. Evaluation of the Norberg angle threshold: a comparison of Norberg angle and distraction index as measures of coxofemoral degenerative joint disease susceptibility in seven breeds of dogs.

    Science.gov (United States)

    Culp, William T N; Kapatkin, Amy S; Gregor, Thomas P; Powers, Michelle Y; McKelvie, Pamela J; Smith, Gail K

    2006-07-01

    To evaluate the thresholds of 2 radiographic methods used to determine coxofemoral joint laxity in 7 breeds of dogs. Three hundred and fifty clinically normal dogs. Retrospective study. Hip radiographs from 7 breeds of dogs were randomly selected from a database. None of the dogs had radiographic evidence of degenerative joint disease (DJD). Distraction index (DI) and Norberg angle (NA) were measured on these radiographs and compared with DI and NA thresholds for diagnosing DJD susceptibility derived from the literature and from evaluated Borzois. Dogs with a NA or =105 degrees and a DI of >0.32 were considered false-negatives. Mean age of all dogs was 22.9 months. Mean NA for all dogs was 99.37 degrees, and mean DI for all dogs was 0.44. Borzoi mean DI of was significantly less than the mean DI of the other 6 breeds. The highest (most hip laxity) Borzoi DI was 0.32, and the lowest (most hip laxity) Borzoi NA was 99 degrees. False-positive and false-negative diagnoses were identified in 6 of the 7 breeds. Using the NA threshold of 105 degrees (literature established threshold of susceptibility to DJD) resulted in a high percentage of false-negative and false-positive diagnoses. Breeds like the Labrador Retriever and Rottweiler would have large numbers of hip dysplasia susceptible dogs remain in the breeding population based on this NA threshold. False-positive diagnoses were common in breeds like the Australian Shepherd, Borzoi, and German Shepherd effectively eliminating hip dysplasia nonsusceptible dogs from the breeding population. The NA was not an accurate predictor of DJD susceptibility in these 7 breeds of dogs when using a NA threshold of 105 degrees.

  9. Computed tomography evaluation of the temporomandibular joint in Class II Division 1 and Class III malocclusion patients: condylar symmetry and condyle-fossa relationship.

    Science.gov (United States)

    Rodrigues, Andréia Fialho; Fraga, Marcelo Reis; Vitral, Robert Willer Farinazzo

    2009-08-01

    The purpose of this study was to investigate the condyle-fossa relationship, the concentric position of the condyles, and the dimensional and positional symmetries between the right and left condyles in Class II Division 1 and Class III malocclusion samples. Thirty subjects from 12 to 38 years of age with Class II Division 1 malocclusion and 16 subjects from 13 to 41 years of age with Class III malocclusion had computed tomography of the temporomandibular joints. The images obtained from the axial slices were evaluated for possible asymmetries in size and position between the condylar processes associated with these malocclusions. The images obtained from the sagittal slices were used to assess the depth of the mandibular fossa, the condyle-fossa relationship, and the concentric position of the condyles associated with these malocclusions. Paired Student t tests were applied, and Pearson product moment correlations were determined after measurements on both sides were obtained. In the Class II Division 1 sample, the distance of condylar process/midsagittal plane (P = 0.019) and posterior joint space (P = 0.049) showed statistically significant differences between the right and left sides. In the Class III sample, there was no statistically significant difference between sides. Statistically significant (P Class II Division 1 group and the Class III group. In the Class II Division 1 malocclusion sample, the distance of condylar process/midsagittal plane and posterior articular space had statistically significant differences between the right and left sides. In the Class III sample, there was no statistically significant difference between sides. Evaluation of the concentric position of the condyles in their mandibular fossae showed nonconcentric positioning for the right and left sides in both the Class II and Class III malocclusion groups.

  10. Thermal fatigue life evaluation of SnAgCu solder joints in a multi-chip power module

    Science.gov (United States)

    Barbagallo, C.; Malgioglio, G. L.; Petrone, G.; Cammarata, G.

    2017-05-01

    For power devices, the reliability of thermal fatigue induced by thermal cycling has been prioritized as an important concern. The main target of this work is to apply a numerical procedure to assess the fatigue life for lead-free solder joints, that represent, in general, the weakest part of the electronic modules. Starting from a real multi-chip power module, FE-based models were built-up by considering different conditions in model implementation in order to simulate, from one hand, the worst working condition for the module and, from another one, the module standing into a climatic test room performing thermal cycles. Simulations were carried-out both in steady and transient conditions in order to estimate the module thermal maps, the stress-strain distributions, the effective plastic strain distributions and finally to assess the number of cycles to failure of the constitutive solder layers.

  11. Comparative evaluation of thickness of jaw-closing muscles in patients with long-standing bilateral temporomandibular joint ankylosis: a retrospective case-controlled study.

    Science.gov (United States)

    Kumar, Vinay V; Malik, Neelima A; Visscher, Corine M; Ebenezer, Supriya; Sagheb, Keyvan; Lobbezoo, Frank

    2015-03-01

    The aim of the study was to compare the thickness and cross-sectional area (CSA) of masseter and medial pterygoid muscles in young patients with long-standing bilateral temporomandibular joint ankylosis (bTMJA) in relation to controls. Axial sections of computed tomography scans of patients with bTMJA from two tertiary care university hospitals were reviewed from 1995 to 2010 and compared to age- and sex-matched controls. The outlines of masseter and medial pterygoid muscles corresponding to a predefined reference plane were traced onto acetate paper. The thickness and CSA of the muscles were calculated using an image-analyzing software and calibrated according to the scale provided in the CT scan slides. Out of a total of 167 cases of temporomandibular joint ankylosis (TMJA), 15 fulfilled the inclusion criteria. The mean thickness and CSA of masseter and medial pterygoid muscles in cases of bTMJA were 19.4 mm (SD 2.3), 734.9 mm(2) (SD 156.7), 11.53 mm (SD 1.35), and 267.4 mm(2) (SD 65.35), respectively. For the control group, respective values were 10.5 mm (SD 1.8), 430.1 mm(2) (SD 66.8), 9.2 mm (SD 1.2), and 254.6 mm(2) (SD 45.7). There was a statistically significant increased thickness and CSA of the muscles in cases of bTMJA as compared to control as evaluated by Mann-Whitney U test. The results show that thickness and CSA of masseter and medial pterygoid muscles in patients with bTMJA were larger as compared to controls. This may suggest that, muscular hyperactivity, may be a cofactor in the pathogenesis of TMJA. Although temporomandibular joint ankylosis is one of the most restrictive musculoskeletal disorder in the maxillofacial region, there is little information on the form and function of jaw muscles in this condition. This study evaluates thickness and cross-sectional areas of jaw elevator muscles and indicates that muscle hyperactivity might be associated with ankylosis, thereby providing a probable hypothesis on the etiopathogenesis of this condition.

  12. Ex vivo biomechanical evaluation of the canine cranial cruciate ligament-deficient stifle with varying angles of stifle joint flexion and axial loads after tibial tuberosity advancement.

    Science.gov (United States)

    Hoffmann, Daniel E; Kowaleski, Michael P; Johnson, Kenneth A; Evans, Richard B; Boudrieau, Randy J

    2011-04-01

    To evaluate the effect of tibial tuberosity advancement (TTA) on cranial tibial thrust (CrTT), retropatellar force (RPF), patellar tendon load (PTL), and patellar tendon angle determined by the tibial plateau angle (PTA(TPA) ) method or common tangent (PTA(CT) ) method in the canine cranial cruciate ligament (CrCL)-deficient stifle joint. Ex vivo cadaver study. Cadaveric canine hind limbs (n=30). Stifle joints were subjected to 3 differing loading conditions using a constrained limb press model (Group 1: 30% body weight axial load at stifle and talocrural joint angles of 135 ± 5° and 145 ± 5°, respectively; Group 2: 30% body weight axial load at stifle and talocrural angles of 145 ± 5° and 135 ± 5°, respectively; and Group 3: 50% body weight axial load at stifle and talocrural joint angles of 135 ± 5° and 145 ± 5°, respectively). The CrCL was transected in situ under load; sensors allowed direct measurement of CrTT, RPF, and PTL. Lateral radiographic projections were used to assess PTA(TPA) and PTA(CT) . Descriptive statistics were used to report CrTT (by design this force returned to 0-point values, defined as the neutral point of advancement [NPA]). At the NPA, RPF was compared with baseline using a 2-tailed sign test. PTL within groups were compared using a paired t-test; pair-wise comparisons of PTA(TPA) and PTA(CT) were performed using a paired t-test. Comparisons between loading conditions were made with a 1-way ANOVA and Tukey's post hoc test. Equivalence tests were used to test mean PTA(TPA) and PTA(CT) for equivalence to 90°. Significance was set at a P-value of .05. CrTT returned to baseline values, and RPF and PTL at NPA were reduced below baseline values in all specimens in a near linear fashion with TTA. At the NPA, PTA(TPA) >PTA(CT) in 2 of the 3 loading conditions, but insufficient evidence to suggest they differed in the third. Mean PTA(TPA) and PTA(CT) varied between loading conditions. The threshold for each of the groups evaluated

  13. Measurement evaluation

    CERN Document Server

    Boros, A

    1990-01-01

    The information obtained about a measured object is called ``crude'' measurement information and must be related to the conditions under which the measurement took place. Using ``crude'' measurement information as a starting point, evaluation produces physically correctly interpreted data with their estimated (or corrected) error. Although a number of works deal with the evaluation of measurements, they either appeared a long time ago or serve essentially different aims. This book gives a comprehensive and current overview on the basic principles, aids, devices, and methods in the eval

  14. Evaluation of diffusion of triamcinolone acetonide from the distal interphalangeal joint into the navicular bursa in horses.

    Science.gov (United States)

    Boyce, Mary; Malone, Erin D; Anderson, Lorraine B; Park, Seijin; Godden, Sandra M; Jenner, Florien; Trumble, Troy N

    2010-02-01

    To determine whether triamcinolone acetonide diffuses from the distal interphalangeal joint (DIPJ) to the navicular bursa, diffusion is direct or systemic, and addition of sodium hyaluronan has an effect on diffusion in horses. 11 adult horses without forelimb lameness. 1 randomly chosen forelimb DIPJ of each horse received an injection of 10 mg of triamcinolone acetonide plus 20 mg of sodium hyaluronan (group 1), and the contralateral forelimb DIPJ received an injection of 10 mg of triamcinolone acetonide plus 2 mL of lactated Ringer's solution (group 2). Synovial fluid samples were taken from both forelimb navicular bursae and 1 hind limb navicular bursa (systemic control group) at 6 hours. Triamcinolone acetonide concentrations in synovial fluid were quantified by use of high-performance liquid chromatography plus tandem mass spectrometry. Data were logarithmically transformed, and contrast analysis was performed on the 3 groups. Triamcinolone acetonide was detected in navicular bursal samples in all groups. Groups 1 and 2 had significantly greater concentrations of triamcinolone acetonide than the systemic control group. There was no significant difference between groups 1 and 2. Triamcinolone acetonide diffused directly from the DIPJ into the navicular bursa in clinically normal horses, and diffusion was not affected by addition of hyaluronan. Injection into the DIPJ with triamcinolone acetonide or a triamcinolone acetonide-hyaluronan combination can potentially be used for treatment of navicular syndrome, but further studies are needed to determine whether triamcinolone acetonide diffuses similarly in horses with navicular syndrome.

  15. Evaluation of a radiographic caudolateral curvilinear osteophyte on the femoral neck and its relationship to degenerative joint disease and distraction index in dogs.

    Science.gov (United States)

    Mayhew, Philipp D; McKelvie, Pamela J; Biery, Darryl N; Shofer, Frances S; Smith, Gail K

    2002-02-15

    To determine prevalence of a radiographic caudolateral curvilinear osteophyte (CCO) on the femoral neck in various breeds and age groups of dogs and to evaluate its contemporaneous relationship with degenerative joint disease (DJD) and distraction index (DI). Cross-sectional prevalence study. 25,968 dogs, including 3,729 German Shepherd Dogs, 4,545 Golden Retrievers, 6,277 Labrador Retrievers, and 1,191 Rottweilers. Data from the University of Pennsylvania Hip Improvement Program database were analyzed, including ventrodorsal hip-extended, compression, and distraction radiographs. The CCO and radiographic signs of DJD were considered independent events and were interpreted as either present or absent. Statistical methods were used to evaluate the CCO as a possible risk factor for DJD and assess its association with DI, as measured by use of distraction radiography. When all breeds were pooled, DJD was detected in 8.6% of dogs, and the CCO was detected in 21.6% of dogs. Among dogs with a CCO, 25.1% had radiographic evidence of DJD. Among dogs without a CCO, only 4% had DJD. Dogs with a CCO were 7.9 times as likely to have DJD as were those without a CCO. Additionally, DI, weight, and age were significant risk factors for the CCO. Results confirm the contemporaneous association between the CCO and DJD and that passive hip laxity, as measured by use of the DI, is associated with both the CCO and DJD.

  16. Numerical Evaluation of Temperature Field and Residual Stresses in an API 5L X80 Steel Welded Joint Using the Finite Element Method

    Directory of Open Access Journals (Sweden)

    Jailson A. Da Nóbrega

    2016-01-01

    Full Text Available Metallic materials undergo many metallurgical changes when subjected to welding thermal cycles, and these changes have a considerable influence on the thermo-mechanical properties of welded structures. One method for evaluating the welding thermal cycle variables, while still in the project phase, would be simulation using computational methods. This paper presents an evaluation of the temperature field and residual stresses in a multipass weld of API 5L X80 steel, which is extensively used in oil and gas industry, using the Finite Element Method (FEM. In the simulation, the following complex phenomena were considered: the variation in physical and mechanical properties of the material as a function of the temperature, welding speed and convection and radiation mechanisms. Additionally, in order to characterize a multipass weld using the Gas Tungsten Arc Welding process for the root pass and the Shielded Metal Arc Welding process for the filling passes, the analytical heat source proposed by Goldak and Chakravarti was used. In addition, we were able to analyze the influence of the mesh refinement in the simulation results. The findings indicated a significant variation of about 50% in the peak temperature values. Furthermore, changes were observed in terms of the level and profile of the welded joint residual stresses when more than one welding pass was considered.

  17. Long-term clinical evaluation of the automatic stance-phase lock-controlled prosthetic knee joint in young adults with unilateral above-knee amputation.

    Science.gov (United States)

    Andrysek, Jan; Wright, F Virginia; Rotter, Karin; Garcia, Daniela; Valdebenito, Rebeca; Mitchell, Carlos Alvarez; Rozbaczylo, Claudio; Cubillos, Rafael

    2017-05-01

    The purpose of this study was to clinically evaluate the automatic stance-phase lock (ASPL) knee mechanism against participants' existing weight-activated braking (WAB) prosthetic knee joint. This prospective crossover study involved 10 young adults with an above-knee amputation. Primary measurements consisted of tests of walking speeds and capacity. Heart rate was measured during the six-minute walk test and the Physiological Cost Index (PCI) which was calculated from heart rate estimated energy expenditure. Activity was measured with a pedometer. User function and quality of life were assessed using the Lower Limb Function Questionnaire (LLFQ) and Prosthetic Evaluation Questionnaire (PEQ). Long-term follow-up over 12 months were completed. Walking speeds were the same for WAB and APSL knees. Energy expenditure (PCI) was lower for the ASPL knees (p = 0.007). Step counts were the same for both knees, and questionnaires indicated ASPL knee preference attributed primarily to knee stability and improved walking, while limitations included terminal impact noise. Nine of 10 participants chose to keep using the ASPL knee as part of the long-term follow-up. Potential benefits of the ASPL knee were identified in this study by functional measures, questionnaires and user feedback, but not changes in activity or the PEQ.

  18. Innovative Evaluation

    Science.gov (United States)

    Maxfield, Margaret

    1974-01-01

    Evaluation procedures meeting the criterion of "facilitating student learning" are discussed. Qualitative reporting with written comments to students is advocated. Other suggestions include giving a quiz during the first week of the course, allowing for retesting, and use of an occasional oral test. Some suggestions for grading are given. (LS)

  19. Contraceptive Evaluation.

    Science.gov (United States)

    Hulka, Barbara S.; And Others

    The objective of research in contraceptive evaluation is to improve the ability of individuals to choose contraceptive methods best suited to their needs and circumstances and to provide information that will lead to the development of safer and more effective methods. There are usually three considerations in judging the importance of a method of…

  20. Evaluative Infrastructures

    DEFF Research Database (Denmark)

    Kornberger, Martin; Pflueger, Dane; Mouritsen, Jan

    2017-01-01

    Platform organizations such as Uber, eBay and Airbnb represent a growing disruptive phenomenon in contemporary capitalism, transforming economic organization, the nature of work, and the distribution of wealth. This paper investigates the accounting practices that underpin this new form of organi...... other); generativity (evaluative infrastructures do not territorialize objects but disclose new worlds); and new forms of control (evaluative infrastructures are not centres of calculation; rather, control is radically distributed, whilst power remains centralized)....... of organizing, and in doing so confronts a significant challenge within the accounting literature: the need to escape what Hopwood (1996) describes as its “hierarchical consciousness”. In order to do so, this paper develops the concept of evaluative infrastructure which describes accounting practices...... that enable platform based organization. They are evaluative because they deploy a plethora of interacting devices, including rankings, ratings, reviews, and audits to establish orders of worth. They are infrastructures because they provide the invisible yet essential mechanisms for the flow of economic...

  1. Final Evaluations

    DEFF Research Database (Denmark)

    Workspace

    2003-01-01

    .  The transformative nature of the encounter between people and technology. Trying to achieve grounded leaps of socio-technical imagination on such shifting  ground is difficult. It demands close and continuous loops of design, use and  evaluation. Our grounded imagination approach combines a range of methods to meet...

  2. The Cost of Joint Replacement: Comparing Two Approaches to Evaluating Costs of Total Hip and Knee Arthroplasty.

    Science.gov (United States)

    Palsis, John A; Brehmer, Thomas S; Pellegrini, Vincent D; Drew, Jacob M; Sachs, Barton L

    2018-02-21

    In an era of mandatory bundled payments for total joint replacement, accurate analysis of the cost of procedures is essential for orthopaedic surgeons and their institutions to maintain viable practices. The purpose of this study was to compare traditional accounting and time-driven activity-based costing (TDABC) methods for estimating the total costs of total hip and knee arthroplasty care cycles. We calculated the overall costs of elective primary total hip and total knee replacement care cycles at our academic medical center using traditional and TDABC accounting methods. We compared the methods with respect to the overall costs of hip and knee replacement and the costs for each major cost category. The traditional accounting method resulted in higher cost estimates. The total cost per hip replacement was $22,076 (2014 USD) using traditional accounting and was $12,957 using TDABC. The total cost per knee replacement was $29,488 using traditional accounting and was $16,981 using TDABC. With respect to cost categories, estimates using traditional accounting were greater for hip and knee replacement, respectively, by $3,432 and $5,486 for personnel, by $3,398 and $3,664 for space and equipment, and by $2,289 and $3,357 for indirect costs. Implants and consumables were derived from the actual hospital purchase price; accordingly, both methods produced equivalent results. Substantial cost differences exist between accounting methods. The focus of TDABC only on resources used directly by the patient contrasts with the allocation of all operating costs, including all indirect costs and unused capacity, with traditional accounting. We expect that the true costs of hip and knee replacement care cycles are likely somewhere between estimates derived from traditional accounting methods and TDABC. TDABC offers patient-level granular cost information that better serves in the redesign of care pathways and may lead to more strategic resource-allocation decisions to optimize

  3. European network for Health Technology Assessment Joint Action (EUnetHTA JA): a process evaluation performed by questionnaires and documentary analysis.

    Science.gov (United States)

    Woodford Guegan, Eleanor; Cook, Andrew

    2014-06-01

    The European network for Health Technology Assessment Joint Action (EUnetHTA JA) project's overarching objective was to 'establish an effective and sustainable HTA [Health technology assessment] collaboration in Europe that brings added value at the regional, national and European level'. Specific objectives were to develop a strategy and business model for sustainable European collaboration on HTA, develop HTA tools and methods and promote good practice in HTA methods and processes. We describe activities performed on behalf of the National Institute for Health Research HTA programme; evaluating the project processes and developing a data set for a registry of planned clinical studies of relevance to public funders. Annual self-completion online questionnaires were sent to project participants and external stakeholders to identify their views about the project processes. Documentary review was undertaken at the project end on the final technical reports from the work packages to examine whether or not their deliverables had been achieved. The project's impact was assessed by whether or not the deliverables were produced, the objectives met and additional 'added value' generated. The project's effectiveness was evaluated by its processes, communication, administration, workings of individual work packages and involvement of external stakeholders. A two-stage Delphi exercise was undertaken to identify the data elements that should be included in a registry of planned clinical studies of relevance to public funders. The data set was validated by an efficacy testing exercise. High response rates were achieved for the questionnaires sent to project participants and this was attributed to the evidence-based strategy implemented. Response rates to questionnaires sent to external stakeholders were disappointingly lower. Most of the high-level objectives were achieved, although applying the developed tools in practice will be implemented in the European network for Health

  4. Evaluating the Effects of local Injections of Bupivacaine and Triamcinolone Acetate on Shoulder Joint Pain and Restricted Range of Motion Following Cerebrovascular Accidents

    Directory of Open Access Journals (Sweden)

    Asadollah Saadat Niaki M.D.

    2011-06-01

    Full Text Available Background: Shoulder pain is a common complication of cerebrovascular accidents. This study was conducted to assess the effects of local injections of bupivacaine and triamcinolone acetate on shoulder joint pain and on restricted range of motion following brain events. Methods: This single-blind clinical trial study included 35 patients with chronic shoulder pain (the controls and 35 patients with chronic shoulder pain due to brain events (the case group. The study was done at Imam Hossein Hospital & Gandhi Day Clinic during the year 2008-2010. The patients in the two groups received bupivacaine and triamcinolone acetate for subacromial bursa injection and suprascapular nerve block by following the protocol described by Dangoisse et al. The patients were followed up for 12 weeks and they were evaluated for pain and range of motion 1, 6, and 12 weeks after the injections.Results: The mean age of the patients was 60.9±9.07 years. Statistically significant improvements in pain score (P=0.001 and shoulder joint range of motion (P=0.001 were observed in patients with chronic shoulder pain versus patients with brain events 12 weeks after suprascapulare nerve block and subacromial bours injections by bupivacaine and triamcinolone acetate.Conclusion: Suprascapular nerve block and subacromial bursa injections of bupivacaine and triamcinolone acetate is a safe and efficacious treatment for the treatment of chronic shoulder pain and restricted range of motion but it is not efficacious or of significant value for the treatment of shoulder pain in patients with brain events.

  5. Ontology Evaluation

    OpenAIRE

    Vrandecic, Zdenko

    2010-01-01

    Ontology evaluation is the task of measuring the quality of an ontology. It enables us to answer the following main question: How to assess the quality of an ontology for the Web? In this thesis a theoretical framework and several methods breathing life into the framework are presented. The application to the above scenarios is explored, and the theoretical foundations are thoroughly grounded in the practical usage of the emerging Semantic Web.

  6. Design and performance of a multi-centre randomised controlled trial and economic evaluation of joint tele-consultations [ISRCTN54264250

    Directory of Open Access Journals (Sweden)

    Thompson Simon

    2002-01-01

    Full Text Available Abstract Background Appropriate information flow is crucial to the care of patients, particularly at the interface between primary and secondary care. Communication problems can result from inadequate organisation and training, There is a major expectation that information and communication technologies may offer solutions, but little reliable evidence. This paper reports the design and performance of a multi-centre randomised controlled trial (RCT, unparalleled in telemedicine research in either scale or range of outcomes. The study investigated the effectiveness and cost implications in rural and inner-city settings of using videoconferencing to perform joint tele-consultations as an alternative to general practitioner referral to the hospital specialist in the outpatient clinic. Methods Joint tele-consultation services were established in both the Royal Free Hampstead NHS Trust in inner London, and the Royal Shrewsbury Hospitals Trust, in Shropshire. All the patients who gave consent to participate were randomised either to joint tele-consultation or to a routine outpatients appointment. The principal outcome measures included the frequency of decision by the specialist to offer a follow-up outpatient appointment, patient satisfaction (Ware Specific Questionnaire, wellbeing (SF12 and enablement (PEI, numbers of tests, investigations, procedures and treatments. Results A total of 134 general practitioners operating from 29 practices participated in the trial, referring a total of 3170 patients to 20 specialists in ENT medicine, general medicine (including endocrinology, and rheumatology, gastroenterology, orthopaedics, neurology and urology. Of these, 2094 patients consented to participate in the study and were correctly randomised. There was a 91% response rate to the initial assessment questionnaires, and analysis showed equivalence for all key characteristics between the treatment and control groups. Conclusion We have designed and

  7. Quantitative 3D ultrashort time-to-echo (UTE) MRI and micro-CT (μCT) evaluation of the temporomandibular joint (TMJ) condylar morphology

    Energy Technology Data Exchange (ETDEWEB)

    Geiger, Daniel [Sapienza University of Rome, Department of Radiological, Oncological and Pathological Sciences, Rome (Italy); Bae, Won C.; Statum, Sheronda; Du, Jiang; Chung, Christine B. [University of California-San Diego, Department of Radiology, San Diego, CA (United States)

    2014-01-15

    Temporomandibular dysfunction involves osteoarthritis of the TMJ, including degeneration and morphologic changes of the mandibular condyle. The purpose of this study was to determine the accuracy of novel 3D-UTE MRI versus micro-CT (μCT) for quantitative evaluation of mandibular condyle morphology. Nine TMJ condyle specimens were harvested from cadavers (2 M, 3 F; age 85 ± 10 years, mean ± SD). 3D-UTE MRI (TR = 50 ms, TE = 0.05 ms, 104-μm isotropic-voxel) was performed using a 3-T MR scanner and μCT (18-μm isotropic-voxel) was also performed. MR datasets were spatially registered with a μCT dataset. Two observers segmented bony contours of the condyles. Fibrocartilage was segmented on the MR dataset. Using a custom program, bone and fibrocartilage surface coordinates, Gaussian curvature, volume of segmented regions, and fibrocartilage thickness were determined for quantitative evaluation of joint morphology. Agreement between techniques (MRI vs. μCT) and observers (MRI vs. MRI) for Gaussian curvature, mean curvature, and segmented volume of the bone were determined using intraclass correlation coefficient (ICC) analysis. Between MRI and μCT, the average deviation of surface coordinates was 0.19 ± 0.15 mm, slightly higher than the spatial resolution of MRI. Average deviation of the Gaussian curvature and volume of segmented regions, from MRI to μCT, was 5.7 ± 6.5 % and 6.6 ± 6.2 %, respectively. ICC coefficients (MRI vs. μCT) for Gaussian curvature, mean curvature, and segmented volumes were 0.892, 0.893, and 0.972, respectively. Between observers (MRI vs. MRI), the ICC coefficients were 0.998, 0.999, and 0.997, respectively. Fibrocartilage thickness was 0.55 ± 0.11 mm, as previously described in the literature for grossly normal TMJ samples. 3D-UTE MR quantitative evaluation of TMJ condyle morphology ex-vivo, including surface, curvature, and segmented volume, shows high correlation against μCT and between observers. In addition, UTE MRI allows

  8. Gender, diabetes education, and psychosocial factors are associated with persistent poor glycemic control in patients with type 2 diabetes in the Joint Asia Diabetes Evaluation (JADE) program.

    Science.gov (United States)

    Yin, Junmei; Yeung, Roseanne; Luk, Andrea; Tutino, Greg; Zhang, Yuying; Kong, Alice; Chung, Harriet; Wong, Rebecca; Ozaki, Risa; Ma, Ronald; Tsang, Chiu-Chi; Tong, Peter; So, Wingyee; Chan, Juliana

    2016-01-01

    Factors associated with persistent poor glycemic control were explored in patients with type 2 diabetes under the Joint Asia Diabetes Evaluation (JADE) program. Chinese adults enrolled in JADE with HbA1c ≥8% at initial comprehensive assessment (CA1) and repeat assessment were analyzed. The improved group was defined as those with a ≥1% absolute reduction in HbA1c, and the unimproved group was those with education level, and was more likely to be insulin treated. Patients in the improved group received more diabetes education between CAs with improved self-care behaviors, whereas the unimproved group had worsening of health-related quality of life at CA2. Apart from female gender, long disease duration, low educational level, obesity, retinopathy, history of hypoglycemia, and insulin use, lack of education from diabetes nurses between CAs had the strongest association for persistent poor glycemic control. These results highlight the multidimensional nature of glycemic control, and the importance of diabetes education and optimizing diabetes care by considering psychosocial factors. © 2015 Ruijin Hospital, Shanghai Jiaotong University School of Medicine and Wiley Publishing Asia Pty Ltd.

  9. American Evaluation Association Guiding Principles for Evaluators

    Energy Technology Data Exchange (ETDEWEB)

    None

    2009-01-18

    Five principles developed by American Evaluation Associ intended to guide professional practice of evaluators & to inform evaluation clients and the general public about principles they can expect to be upheld by professional evaluators.

  10. ADAPTATION EVALUATION

    Directory of Open Access Journals (Sweden)

    Björn PETERS, M.Sc.

    2001-01-01

    Full Text Available Twenty subjects with lower limb disabilities participated in a simulator study. The purpose of the study was to investigate how an Adaptive Cruise Control (ACC system together with two different hand controls for accelerator and brake influenced workload, comfort and driving behaviour and to further develop a method to evaluate vehicle adaptations for drivers with disabilities. The installed ACC system could maintain a constant speed selected and set by the driver and it also adapted speed in order to keep a safe distance to a leading vehicle. Furthermore, it included a stop-and-go function. Two common types of hand controls for accelerator and brake were used. The hand controls were different both with respect to function, single or dual levers, and position, on the steering column or between the front seats. The subjects were all experienced drivers of adapted cars equipped with hand controls. All subjects drove 100km at two occasions, with and without the ACC system available but with the same hand control. Subjective workload was found to be significantly lower and performance better for the ACC condition. The difference in speed variation between manual and ACC supported driving increased with the distance driven which seems to support the previous finding. The subjects thought they could control both speed and distance to leading vehicles better while the ACC was available. ACC driving did not influence reaction time, speed level, lateral position or variation in lateral position. Headway during car following situations was shorter for the ACC condition compared to manual driving. The ACC was well received, trusted and wanted. It was concluded that the ACC system substantially decreased workload, increased comfort and did not influence safety negatively. The only difference found between the two types of hand controls was that drivers using the dual lever system had less variation in lateral position. The applied evaluation method proved

  11. Development and verification of a protocol to quantify hip joint kinematics: an evaluation of ice hockey goaltender pads on hip motion.

    Science.gov (United States)

    Frayne, Ryan J; Kelleher, Leila K; Wegscheider, Peter K; Dickey, James P

    2015-09-01

    The butterfly save technique is commonly used by ice hockey goaltenders and has recently been identified as a potential mechanism for hip joint injuries due to the extreme body positions involved. Unfortunately, commonly used kinematic marker sets that determine these body positions are heavily influenced by skin motion artifact and are obscured by protective equipment, making it difficult to obtain reliable measures of hip motion. To create a new kinematic protocol that could be used when protective equipment prevents typical marker placements and to use this protocol to quantify hip kinematics and butterfly performance in 4 different goalie pad conditions. Controlled laboratory study. A new marker set consisting of marker clusters attached to the lateral thigh and posterior leg was developed. This marker set was verified by evaluating the root mean square (RMS) difference between the developed testing marker set and the calibrated anatomic systems technique marker set during passive range of motion (ROM) tests. The testing marker set was then used in a repeated-measures study in which 12 junior goaltenders performed 5 butterfly movements on synthetic ice, in 4 different goalie pad conditions (control, flexible-wide leg channel, flexible-tight leg channel, and stiff-wide leg channel). The grouped RMS differences and SDs calculated during verification were 1.43° ± 0.41°, 1.0° ± 0.39°, and 3.32° ± 1.32° for hip flexion-extension, abduction-adduction, and internal-external rotation, respectively. There was no significant main effect of goal pad condition on the peak amount of hip internal rotation; however, there was a significant main effect of goal pad condition on the butterfly width (P = .022). Post hoc comparisons revealed that the butterfly width was significantly smaller in the control pad condition compared with the flexible-tight pad condition (P = .03). The new marker set enabled measurements of hip joint kinematics while subjects are wearing

  12. Evaluation of arthrocentesis with hyaluronic acid injection plus oral glucosamine hydrochloride for temporomandibular joint osteoarthritis in oral-health-related quality of life.

    Science.gov (United States)

    Su, Naichuan; Yang, Xianrui; Liu, Yan; Huang, Yi; Shi, Zongdao

    2014-09-01

    To evaluate the changes in oral-health-related quality of life (OHRQoL) in patients with temporomandibular joint osteoarthritis (TMJ-OA) who underwent five weekly hyaluronic acid injections together with oral glucosamine hydrochloride for three months. This prospective observational study included 211 consecutive patients who completed the Chinese version of the 14-item Oral Health Impact Profile (OHIP-C14) before treatment (T0), and at first month (T1), third month (T2), and sixth month (T3) after the first injection. Significant changes in the summary scores on OHIP-C14 were observed during follow-up (P < 0.001). The scores were significantly reduced at T1, T2, and T3 compared with T0 (P < 0.001), and were significantly reduced from T0 to T1 (P < 0.001) and T1 to T2 (P < 0.001), but not from T2 to T3 (P = 0.369). Compared with the norms, the scores were significantly higher at T0 (P < 0.001), not significantly different at T1 (P = 0.482), and significantly lower at T2 (P = 0.013) and T3 (P = 0.003). The changes in the scores differed significantly among age groups (P = 0.012) but not between sexes (P = 0.293). TMJ-OA has a negative effect on patient OHRQoL. OHRQoL scores were improved to normal levels in both the short and long terms after therapy. OHRQoL improvement was the greatest in the youngest group, but did not differ between the sexes. Copyright © 2013 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  13. From design to implementation - The Joint Asia Diabetes Evaluation (JADE program: A descriptive report of an electronic web-based diabetes management program

    Directory of Open Access Journals (Sweden)

    Lyubomirsky Greg

    2010-05-01

    Full Text Available Abstract Background The Joint Asia Diabetes Evaluation (JADE Program is a web-based program incorporating a comprehensive risk engine, care protocols, and clinical decision support to improve ambulatory diabetes care. Methods The JADE Program uses information technology to facilitate healthcare professionals to create a diabetes registry and to deliver an evidence-based care and education protocol tailored to patients' risk profiles. With written informed consent from participating patients and care providers, all data are anonymized and stored in a databank to establish an Asian Diabetes Database for research and publication purpose. Results The JADE electronic portal (e-portal: http://www.jade-adf.org is implemented as a Java application using the Apache web server, the mySQL database and the Cocoon framework. The JADE e-portal comprises a risk engine which predicts 5-year probability of major clinical events based on parameters collected during an annual comprehensive assessment. Based on this risk stratification, the JADE e-portal recommends a care protocol tailored to these risk levels with decision support triggered by various risk factors. Apart from establishing a registry for quality assurance and data tracking, the JADE e-portal also displays trends of risk factor control at each visit to promote doctor-patient dialogues and to empower both parties to make informed decisions. Conclusions The JADE Program is a prototype using information technology to facilitate implementation of a comprehensive care model, as recommended by the International Diabetes Federation. It also enables health care teams to record, manage, track and analyze the clinical course and outcomes of people with diabetes.

  14. From design to implementation--the Joint Asia Diabetes Evaluation (JADE) program: a descriptive report of an electronic web-based diabetes management program.

    Science.gov (United States)

    Ko, Gary T; So, Wing-Yee; Tong, Peter C; Le Coguiec, Francois; Kerr, Debborah; Lyubomirsky, Greg; Tamesis, Beaver; Wolthers, Troels; Nan, Jennifer; Chan, Juliana

    2010-05-13

    The Joint Asia Diabetes Evaluation (JADE) Program is a web-based program incorporating a comprehensive risk engine, care protocols, and clinical decision support to improve ambulatory diabetes care. The JADE Program uses information technology to facilitate healthcare professionals to create a diabetes registry and to deliver an evidence-based care and education protocol tailored to patients' risk profiles. With written informed consent from participating patients and care providers, all data are anonymized and stored in a databank to establish an Asian Diabetes Database for research and publication purpose. The JADE electronic portal (e-portal: http://www.jade-adf.org) is implemented as a Java application using the Apache web server, the mySQL database and the Cocoon framework. The JADE e-portal comprises a risk engine which predicts 5-year probability of major clinical events based on parameters collected during an annual comprehensive assessment. Based on this risk stratification, the JADE e-portal recommends a care protocol tailored to these risk levels with decision support triggered by various risk factors. Apart from establishing a registry for quality assurance and data tracking, the JADE e-portal also displays trends of risk factor control at each visit to promote doctor-patient dialogues and to empower both parties to make informed decisions. The JADE Program is a prototype using information technology to facilitate implementation of a comprehensive care model, as recommended by the International Diabetes Federation. It also enables health care teams to record, manage, track and analyze the clinical course and outcomes of people with diabetes.

  15. Evaluation of the role of splint therapy in the treatment of temporomandibular joint pain on the basis of MRI evidence of altered disc position.

    Science.gov (United States)

    Hasegawa, Yoko; Kakimoto, Naoya; Tomita, Seiki; Fujiwara, Masanori; Ishikura, Reichi; Kishimoto, Hiromitsu; Honda, Kosuke

    2017-04-01

    To clarify whether altering temporomandibular joint (TMJ) condyle and disc positions by occlusal splint (splint) therapy relieves TMJ pain and to determine whether splint therapy facilitates improvement of the ranges of condyle and articular disc motions. A total of 150 joints of 75 patients admitted with TMJ pain/discomfort were evaluated. A visual analog scale for TMJ pain was administered during visits following the start of splint treatment. At the start of splint treatment, MRI was performed with/without splint insertion, after which condyle/disc movements were evaluated. Disc position and function, disc configuration, joint effusion, osteoarthritis, and the bone marrow were evaluated. Pearson's correlation coefficients, linear regression, and multiple regression analyses were used for statistical analysis. Splint-related anterior movement of the condyle was related to TMJ pain. With a biconvex disc and/or bone marrow abnormality, splint treatment was ineffective for reducing TMJ pain. Splint therapy was not likely to be successful for any kind of TMJ abnormalities, such as bone marrow abnormalities and/or a biconvex disc appearance on MRI. Copyright © 2017 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  16. Simulated and reconstructed climate in Europe during the last five centuries: joint evaluation of climate models performance and the dynamical consistency of gridded reconstructions

    Science.gov (United States)

    José Gómez-Navarro, Juan; Bothe, Oliver; Wagner, Sebastian; Zorita, Eduardo; Werner, Johannes P.; Luterbacher, Jürg; Raible, Christoph C.; Montávez, Juan Pedro

    2015-04-01

    This study jointly analyses European winter and summer temperature and precipitation gridded climate reconstructions and a regional climate simulation reaching a resolution of 45 km over the period 1501-1990. In a first step, the simulation is compared to observational records to establish the model performance and to identify the most prominent caveats. It is found that the regional simulation is able to add value to the driving global simulation, which allows it to reproduce accurately the most prominent characteristics of the European climate, although remarkable biases can also be identified. In a second step, the simulation is compared to a set on independent reconstructions. The high-resolution of the simulation and the reconstructions allows to analyse the European area for nine sub-areas. An overall good agreement is found between the reconstructed and simulated climate variability across different areas, supporting a consistency of both products and the proper calibration of the reconstructions. However, biases appear between both datasets, that thanks to the evaluation of the model performance carried out before, can be attributed to deficiencies in the simulation. Although the simulation responds to external forcing, it largely differers with reconstructions in their estimates of the past climate evolution for European sub-regions. In particular, there are deviations between simulated and reconstructed anomalies during the Maunder and Dalton minima, i.e. the simulated response is much stronger than the reconstructed. This disagreement is to some extent expected given the prominent role of internal variability in the regional evolution of temperature and precipitation. However the inability of the model to reproduce any warm period similar to that recorded around 1740 in the reconstructions indicates fundamental limitations in the simulation that preclude reproducing exceptionally anomalous conditions. Despite these limitations, the simulated climate is a

  17. The Venera-D Mission Concept: Evaluation by a Joint Science Definition Team of a Means for the Comprehensive Scientific Exploration of Venus

    Science.gov (United States)

    Senske, D.; Zasova, L. V.; Economou, T.; Eismont, N.; Esposito, L. W.; Gerasimov, M.; Ignatiev, N. I.; Ivanov, M.; Jessup, K. L.; Korablev, O.; Tibor, K.; Limaye, S. S.; Martynov, A.; Ocampo, A.

    2016-12-01

    Located in the same part of the solar system and formed out of the same protoplanetary material, Venus is Earth's twin. Although these siblings have nearly the same size, mass, and density, the climate of Venus, fueled by a massive CO2 atmosphere has an enormous greenhouse effect with a surface pressure of 90 atm. and a temperature of 470°C. Shrouded in clouds of sulfuric acid, the surface lacks water and has been sculpted by volcanism and deformed by faulting and folding forming rifts and belts of mountains. The lack of an intrinsic magnetic field suggests the planet's interior structure may be different than that of the earth. The study of Venus will aid in better understanding our own world and the possible future evolution of our climate. In particular, the instability of our climate and the increase in amount of greenhouse gases-can our climate be slowly going in Venus' direction? Despite the advancement in understanding achieved from previous and ongoing missions, the key questions concerning the origin and evolution of Venus and its climate cannot be solved by observations from orbit alone. Direct measurements in the atmosphere and on the surface are required. In this regard, a Joint Science Definition Team (JSDT) chartered by NASA and IKI/Roscosmos has been studying a concept for the comprehensive investigation of Venus that would consist of an orbiter (>3 yr. of operation) and a lander (2 hrs. on the surface). The scientific goals of the concept are tied closely to the key objectives established by VEXAG and the NASA Planetary Decadal Survey and include: investigation of the thermal structure and chemical composition of the atmosphere and clouds, abundances and isotopic ratios of the light and noble gases; study of the thermal balance, dynamics, and super-rotation of the atmosphere; determination of the surface mineralogy and elemental composition including key radioactive isotopes; study of potential current volcanic and electrical activity; and study of

  18. Avaliações radiográfica e ultra-sonográfica do joelho de ovinos Radiographic and ultrasonographic evaluations of the ovine stifle joint

    Directory of Open Access Journals (Sweden)

    Khadije Hette

    2008-09-01

    Full Text Available Com o presente trabalho visou-se estudar as características osteo-articulares do joelho de ovinos hígidos em diferentes idades, considerando duas possibilidades de exames: radiográfico e ultra-sonográfico. Foram utilizados 18 ovinos da raça Santa Inês, divididos em três grupos experimentais eqüitativos: Grupo I, idade de 6-8 meses (peso médio de 25 kg; Grupo II, idade de 2 anos (peso médio de 50 kg; Grupo III, idade de 3-5 anos (peso médio de 55 kg. Radiograficamente, na incidência craniocaudal, o côndilo femoral lateral apresentou-se mais amplo que o côndilo medial, assim como o côndilo tibial lateral foi maior em relação ao medial. A patela apresentava base em formato piramidal e ápice afilado na incidência mediolateral. Dos 36 membros avaliados, o osso sesamóide medial do músculo gastrocnêmio foi visibilizado em apenas um membro e o osso sesamóide lateral em quatro. A fíbula foi identificada somente em um animal do Grupo III. As linhas fisárias femoral distal, tibial proximal e da tuberosidade da tíbia puderam ser avaliadas em todas as radiografias, estando fechadas ou semifechadas especialmente nos ovinos do Grupo III. Ao exame ultra-sonográfico, a superfície convexa da patela foi visibilizada como uma linha hiperecogênica com sombra acústica e a cartilagem articular dos côndilos femorais como uma linha hipoecogênica contornando a superfície óssea. O ligamento patelar intermédio mostrou-se como uma estrutura fibrilar hiperecogênica homogênea com espessura de 1,2 a 3,2mm. Os meniscos lateral e medial apresentaram formato triangular, aspecto discretamente heterogêneo e ecogenicidade moderada. Sendo assim, o exame radiográfico foi útil para avaliar especialmente as estruturas ósseas do joelho e o fechamento da placa fisária, e a ultra-sonografia permitiu identificar algumas das estruturas teciduais moles, como os meniscos e o ligamento patelar.The aim of this study was to evaluate the stifle joint of 18

  19. Ultra-high performance fiber-reinforced concrete (UHPFRC) for infrastructure rehabilitation : volume 1 : evaluation of ultra high strength concrete (UHSC) in joints of bridge girders.

    Science.gov (United States)

    2017-03-01

    Joints are often considered as the weak link in a structure and often deterioration of the structure initiates from the : joints. Joints transfer the stresses from super-structure to sub-structure and in this process are subjected to large : transfer...

  20. 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.

    Science.gov (United States)

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

    2010-05-28

    A randomized, double-blind, controlled trial. 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. 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. 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. Significant improvement with significant pain relief of >or= 50% and functional improvement of >or= 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. 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.

  1. Evaluation of Rhenium Joining Methods

    Science.gov (United States)

    Reed, Brian D.; Morren, Sybil H.

    1995-01-01

    Coupons of rhenium-to-Cl03 flat plate joints, formed by explosive and diffusion bonding, were evaluated in a series of shear tests. Shear testing was conducted on as-received, thermally-cycled (100 cycles, from 21 to 1100 C), and thermally-aged (3 and 6 hrs at 1100 C) joint coupons. Shear tests were also conducted on joint coupons with rhenium and/or Cl03 electron beam welded tabs to simulate the joint's incorporation into a structure. Ultimate shear strength was used as a figure of merit to assess the effects of the thermal treatment and the electron beam welding of tabs on the joint coupons. All of the coupons survived thermal testing intact and without any visible degradation. Two different lots of as-received, explosively-bonded joint coupons had ultimate shear strengths of 281 and 310 MPa and 162 and 223 MPa, respectively. As-received, diffusion-bonded coupons had ultimate shear strengths of 199 and 348 MPa. For the most part, the thermally-treated and rhenium weld tab coupons had shear strengths slightly reduced or within the range of the as-received values. Coupons with Cl03 weld tabs experienced a significant reduction in shear strength. The degradation of strength appeared to be the result of a poor heat sink provided during the electron beam welding. The Cl03 base material could not dissipate heat as effectively as rhenium, leading to the formation of a brittle rhenium-niobium intermetallic.

  2. Uncertainty in decision models analyzing cost-effectiveness : The joint distribution of incremental costs and effectiveness evaluated with a nonparametric bootstrap method

    NARCIS (Netherlands)

    Hunink, Maria; Bult, J.R.; De Vries, J; Weinstein, MC

    1998-01-01

    Purpose. To illustrate the use of a nonparametric bootstrap method in the evaluation of uncertainty in decision models analyzing cost-effectiveness. Methods. The authors reevaluated a previously published cost-effectiveness analysis that used a Markov model comparing initial percutaneous

  3. 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: Laboratory investigation.

    Science.gov (United States)

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

    2014-10-01

    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. 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. 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 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

  4. Proprioceptive deficit in individuals with unilateral tearing of the anterior cruciate ligament after active evaluation of the sense of joint position

    National Research Council Canada - National Science Library

    Cossich, Victor; Mallrich, Frédéric; Titonelli, Victor; de Sousa, Eduardo Branco; Velasques, Bruna; Salles, José Inácio

    2014-01-01

    .... Twenty patients with unilateral ACL tearing participated in the study. Their active reproduction of joint position in the limb with the deficient ACL and in the healthy contralateral limb was tested...

  5. Measure Evaluation Dataverse

    Data.gov (United States)

    US Agency for International Development — The MEASURE Evaluation Dataverse is a collection of innovative evaluation data sets assembled in order to increase the evidence-base on program impact and evaluate...

  6. Evaluation and Tests

    Science.gov (United States)

    ... University of Utah Research News Make a Difference Evaluation + Tests Print This Page Before diagnosing peripheral neuropathy, ... from any type of neuropathy or neurological disorder. Evaluation A neurological evaluation consists of a physical exam ...

  7. Precision Clock Evaluation Facility

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Tests and evaluates high-precision atomic clocks for spacecraft, ground, and mobile applications. Supports performance evaluation, environmental testing,...

  8. Evaluation of the gait performance of above-knee amputees while walking with 3R20 and 3R15 knee joints

    Directory of Open Access Journals (Sweden)

    AliReza Taheri

    2012-01-01

    Full Text Available Background: The performance of the subjects with above-knee amputation is noticeably poorer than normal subjects. Various types of components have been designed to compensate their performance. Among various prosthetic components, the knee joint has great influence on the function. Two types of knee joints (3R15, 3R20 have been used broadly for above-knee prostheses. However, there is not enough research to highlight the influence of these joints on the gait performance of the subjects. Therefore, an aim of this research was to investigate the performance of the above-knee amputees while walking with 3R15 and 3R20 knee joints. Materials and Methods: 7 above-knee amputees were recruited in this research study. They were asked to walk with a comfortable speed to investigate the gait function of the subjects with 3 cameras 3D motion analysis system (Kinematrix system. The difference between the performances of the subjects with these joints was compared by use of paired t-test. Results: The results of this study showed that, the performances of the subjects with 3R20 were better than that with 3R15. The walking speed of the subjects with 3R20 was 66.7 m/min compared to 30.4 m/min (P-value = 0.045. Moreover; the symmetry of walking with 3R20 was more than that with 3R15, based on the spatio- temporal gait parameters values (P-value <0.05. Conclusion: The difference between the performances of the subjects with 3R20 and 3R15 knee joints was related to the walking speed, which improved while walking with 3R20 joint.

  9. Evaluating the CDIO Self-Evaluation

    DEFF Research Database (Denmark)

    Bennedsen, Jens; Georgsson, Fredrik; Kontio, Juha

    2014-01-01

    This article analyses the CDIO self-evaluation rubric. It analyses each of the rubrics associ-ated to the standards. The analysis is done by the authors based on their experience in do-ing self-evaluations. The structure of the original rubric are kept (i.e. each standard are eval-uated on a 0......-5 point scale). Outcomes of the analysis are proposals for clarifications, preci-sions and extensions of the rubrics....

  10. Design and Evaluation of a New Type of Knee Orthosis to Align the Mediolateral Angle of the Knee Joint with Osteoarthritis

    Science.gov (United States)

    Esrafilian, Amir; Karimi, Mohammad Taghi; Eshraghi, Arezoo

    2012-01-01

    Background. Osteoarthritis (OA) is a disease which influences the performance of the knee joint. Moreover, the force and moments applied on the joint increase in contrast to normal subjects. Various types of knee orthoses have been designed to solve the mentioned problems. However, there are other problems in terms of distal migration during walking and the alignment of the orthosis which cannot be changed following the use of brace. Therefore, the main aim of the research was to design an orthosis to solve the aforementioned problems. Method. A new type of knee orthosis was designed with a modular structure. Two patients with knee OA participated in this research project. The force applied on the foot, moment transmitted through the knee joint, and spatiotemporal gait parameters were measured by use of a motion analysis system. Results. The results of the research showed that the adduction moment applied on the knee joint decreased while subjects walked with the new knee orthosis (P-value knee brace can be used as an effective treatment to decrease the loads applied on the knee joint and to improve the alignment whilst walking. PMID:22577565

  11. Design and Evaluation of a New Type of Knee Orthosis to Align the Mediolateral Angle of the Knee Joint with Osteoarthritis

    Directory of Open Access Journals (Sweden)

    Amir Esrafilian

    2012-01-01

    Full Text Available Background. Osteoarthritis (OA is a disease which influences the performance of the knee joint. Moreover, the force and moments applied on the joint increase in contrast to normal subjects. Various types of knee orthoses have been designed to solve the mentioned problems. However, there are other problems in terms of distal migration during walking and the alignment of the orthosis which cannot be changed following the use of brace. Therefore, the main aim of the research was to design an orthosis to solve the aforementioned problems. Method. A new type of knee orthosis was designed with a modular structure. Two patients with knee OA participated in this research project. The force applied on the foot, moment transmitted through the knee joint, and spatiotemporal gait parameters were measured by use of a motion analysis system. Results. The results of the research showed that the adduction moment applied on the knee joint decreased while subjects walked with the new knee orthosis (P-value < 0.05. Conclusion. The new design of the knee brace can be used as an effective treatment to decrease the loads applied on the knee joint and to improve the alignment whilst walking.

  12. Morphologic Analysis of the Temporomandibular Joint Between Patients With Facial Asymmetry and Asymptomatic Subjects by 2D and 3D Evaluation: A Preliminary Study.

    Science.gov (United States)

    Zhang, Yuan-Li; Song, Jin-Lin; Xu, Xian-Chao; Zheng, Lei-Lei; Wang, Qing-Yuan; Fan, Yu-Bo; Liu, Zhan

    2016-03-01

    Signs and symptoms of temporomandibular joint (TMJ) dysfunction are commonly found in patients with facial asymmetry. Previous studies on the TMJ position have been limited to 2-dimensional (2D) radiographs, computed tomography (CT), or cone-beam computed tomography (CBCT). The purpose of this study was to compare the differences of TMJ position by using 2D CBCT and 3D model measurement methods. In addition, the differences of TMJ positions between patients with facial asymmetry and asymptomatic subjects were investigated. We prospectively recruited 5 patients (cases, mean age, 24.8 ± 2.9 years) diagnosed with facial asymmetry and 5 asymptomatic subjects (controls, mean age, 26 ± 1.2 years). The TMJ spaces, condylar and ramus angles were assessed by using 2D and 3D methods. The 3D models of mandible, maxilla, and teeth were reconstructed with the 3D image software. The variables in each group were assessed by t-test and the level of significance was 0.05. There was a significant difference in the horizontal condylar angle (HCA), coronal condylar angle (CCA), sagittal ramus angle (SRA), medial joint space (MJS), lateral joint space (LJS), superior joint space (SJS), and anterior joint space (AJS) measured in the 2D CBCT and in the 3D models (P 3D measurement method is more accurate and effective for clinicians to investigate the morphology of TMJ than the 2D method.

  13. Incorporating assessment of the cervical facet joints in the modified Stoke ankylosing spondylitis spine score is of additional value in the evaluation of spinal radiographic outcome in ankylosing spondylitis.

    Science.gov (United States)

    Maas, Fiona; Arends, Suzanne; Brouwer, Elisabeth; Bootsma, Hendrika; Bos, Reinhard; Wink, Freke R; Spoorenberg, Anneke

    2017-04-26

    To aim was to investigate the additional value of incorporating the de Vlam cervical facet joint score in the modified ankylosing spondylitis (AS) spine score (mSASSS) for the evaluation of spinal radiographic outcome in AS. Baseline and 4-year radiographs from 98 consecutive patients from the Groningen Leeuwarden AS (GLAS) cohort, who had AS treated with TNF-α inhibitors, were scored by two readers; the vertebral bodies were assessed according to the mSASSS (0-72) and cervical facet joints (C2-C7) were assessed according to the method of de Vlam (0-15). The combined AS spine score (CASSS) was calculated as the sum of both total scores (range 0-87) and compared with the original mSASSS according to three aspects of the Outcome Measures in Rheumatology Clinical Trials (OMERACT) filter: feasibility, discrimination, and truth. Feasibility: the CASSS was calculated in 91% of the patients. No additional radiographs were necessary and the assessment took only a few extra minutes. Discrimination: both scoring methods had excellent inter-observer reliability (intra-class correlation coefficient (ICC) status scores >0.99, progression scores 0.92). Incorporating the cervical facet joints did not result in an increase in measurement error. The CASSS detected more patients with definite damage (61% vs. 57%) and definite progression (55% vs. 48%). Truth: higher CASSS scores at baseline and higher progression scores were seen in 41 (46%) and 22 (25%) patients, respectively. Cervical rotation correlated better with cervical CASSS than with cervical mSASSS (Spearman's rho = 0.68 vs. 0.59). The CASSS is a relevant and easy modification of the mSASSS. It captures more patients with AS who have spinal radiographic damage and progression, which is of great additional value in the evaluation of radiographic outcome in this heterogeneous and overall slowly progressing disease.

  14. Robustness Evaluation of Timber Structures

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Sørensen, John Dalsgaard

    2009-01-01

    The present paper considers robustness evaluation of a Norwegian sports arena with a structural system of glulam frames. The robustness evaluation is based on the framework for robustness analysis introduced in the Danish Code of Practice for the Safety of Structures and a probabilistic modelling...... of the timber material proposed in the Probabilistic Model Code (PMC) of the Joint Committee on Structural Safety (JCSS). The results show that the requirements for robustness of the structure are highly related to the modelling of the snow load used on the structures when ‘removal of a limited part...... of the structure' is considered....

  15. Determination of characteristic defect features for computer-aided image evaluation of welded joint radiographs; Bestimmung charakteristischer Fehlermerkmale zur rechnergestuetzten Bildauswertung von Schweissnahtradiographien

    Energy Technology Data Exchange (ETDEWEB)

    Rose, P.

    1995-08-01

    Automatic inspection of weld radiographs require a reliable detection and evaluation of the existing defects. Pretentious image processing is necessary to identify the right defect type after the defect detection is already finished. For that, features must be extracted from the image plane to describe the special characteristics of the different defect types. Which kind of features are most important for the recogniction of the defect types will be discussed in this papaer. All features, used in this investigation, are based upon geometric shape and gray level distribution of the defect representation in the radiographic image. The features are tested as single features and feature combinations on more than 500 samples of real weld defects. In the one-dimensional case, all features are evaluated by the Fisher discriminant and the Bhattacharyya coefficient. For evaluation in the multi-dimensional feature space the principal component transformation is additionally used. The tests consider different defect types and different configurations of defect classes. The results are presented in a final statistical interpretation. (orig.) [Deutsch] Die automatische Auswertung von Schweissnahtradiographien erfordert eine zuverlaessige Erkennung und Beurteilung der im Roentgenbild wiedergegebenen Schweissnahtfehler. Hierzu sind aufwendige Bildverarbeitungsoperationen notwendig, die nach der Detektion der Fehler auch eine Fehlertypenbestimmung ermoeglichen. Um aus den Fehlerabbildungen die zur Typenbestimmung relevanten Informationen zu gewinnen, werden Merkmale zur Unterscheidung verschiedener Fehlertypen geeignet sind und wie sich diese Merkmale an Abbildungen realer Schweissnahtfehler verhalten, wird im Rahmen dieser Arbeit untersucht. Es werden insgesamt 15 Merkmale vorgestellt, die ihre fehlerspezifischen Kennwerte aus der Geometrie und der Grauwertverteilung der Fehlerabbildungen ermitteln. Die Merkmale werden als Einzelmerkmale und als Merkmalskombination an einem

  16. Students Evaluation of Faculty

    Science.gov (United States)

    Thawabieh, Ahmad M.

    2017-01-01

    This study aimed to investigate how students evaluate their faculty and the effect of gender, expected grade, and college on students' evaluation. The study sample consisted of 5291 students from Tafila Technical University Faculty evaluation scale was used to collect data. The results indicated that student evaluation of faculty was high (mean =…

  17. [PIC Program Evaluation Forms.

    Science.gov (United States)

    Short, N. J.

    These 4 questionnaires are designed to elicit teacher and parent evaluations of the Prescriptive Instruction Center (PIC) program. Included are Teacher Evaluation of Program Effectiveness (14 items), M & M Evaluation of Program Implementation (methods and materials specialists; 11 items), Teacher Evaluation of Program Effectiveness--Case Study…

  18. "Cultural Paranoia" and Evaluation.

    Science.gov (United States)

    Rozsnafszky, Jane; Hendel, Darwin D.

    The present report describes the results of an evaluation study of the first course in the new Women's Studies program at the University of Minnesota and the resistance of the teaching assistants for the course to the evaluation. A hypothesis to explain this resistance is that an outside evaluator may face inherent difficulties in evaluating new…

  19. Evaluation of Educational Television.

    Science.gov (United States)

    Baggaley, P. Jonathan, Ed.; And Others

    Eleven articles on the evaluation of educational television (ETV) in South Africa are provided. Under the heading "Theory" are: (1) "The Meaning of Evaluation and Its Practice" (D. Nevo); (2) "Criteria for Evaluating ETV: A Theoretical Framework" (R. Israeli); and (3) "Sources of Evaluation Criteria in Education,…

  20. Evaluation electric bicycles; Evaluation velos electriques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-10-01

    Leovelo service is the first measure in favor of the bicycle to control the air pollution and to conserve energy. It provides in the city of Clermont-Ferrand (France) a service of bicycle hiring. This document evaluates the project after two years of operating. It provides a technical evaluation (maintenance, equipment, financing) and also the socio-economic impacts. (A.L.B.)

  1. Evaluation of a Robotic Assistance-System For Percutaneous Computed Tomography-Guided (CT-Guided) Facet Joint Injection: A Phantom Study.

    Science.gov (United States)

    Beyer, Lukas Philipp; Michalik, Katharina; Niessen, Christoph; Platz Batista da Silva, Natascha; Wiesinger, Isabell; Stroszczynski, Christian; Wiggermann, Philipp

    2016-09-20

    BACKGROUND The aim of this study was to compare robotic assisted and freehand facet joint puncture on a phantom model in regards to time requirements and puncture accuracy. MATERIAL AND METHODS Forty facet joints were punctured, 20 using a robotic guidance system and 20 using a freehand procedure. Side and height of the facet joints were randomized and identical for both groups. Procedural accuracy, defined as axial and sagittal deviation, as well as the number of corrections were assessed. Procedure times for each step were documented and time requirements for pre-positioning, reconstruction, planning, and total intervention were calculated. RESULTS Total procedure time for robotic guidance was 259±111 seconds versus 119±77 seconds for freehand procedure (p=1.0). Procedural accuracy for robotic guidance was significantly higher with 0 corrections versus 1.3 corrections for freehand procedure (p=0.02). Needle deviation in the robotics arm was 0.35±1.1 mm in the axial and 2.15±1.2 mm in the sagittal reconstruction. CONCLUSIONS Robotic assisted puncture of the facet joint allowed accurate positioning of the needle with a lower number of needle readjustments. Higher procedural accuracy was marginally offset by a slightly longer intervention time.

  2. Evaluating the Effectiveness Of Postfire Rehabilitation Treatments

    Science.gov (United States)

    Peter R. Robichaud; Jan L. Beyers; Daniel G. Neary

    2000-01-01

    Spending on postfire emergency watershed rehabilitation has increased during the past decade. A west-wide evaluation of USDA Forest Service burned area emergency rehabilitation (BAER) treatment effectiveness was undertaken as a joint project by USDA Forest Service Research and National Forest System staffs. This evaluation covers 470 fires and 321 BAER projects, from...

  3. Country report INDIA - MFS II EVALUATIONS

    NARCIS (Netherlands)

    Lensink, R.; Bedi, A.; Gangopadhyay, S.; Ghosh, N.; Goderis, B.; Kumar Yadav, B.; Meesters, A.; Prasad Mohapatra, B.; Rao Sahib, P.; Sethi, S.; Sharma, P.; Srinivasan, S.; Klaver, D.C.; Desalos, C.B.; Hofstede, M.; Wadhwa, S.; Pandey, R.; Madaan, A.; Kalra, A.; Kusters, C.S.L.; Bhargava, S.; Buizer, N.N.; Kishore Das, A.; Wilson Bhatra, R.; Sen, P.; Bulte, E.; Pradhan, M.

    2015-01-01

    This report on India is one of a series of evaluation reports, consisting of ten reports in total, reflecting the results of the jointly-organised MFS II evaluation: - Eight country reports (India, Bangladesh, Ethiopia, Uganda, Indonesia, DR Congo, Liberia, Pakistan); - A synthesis report (covering

  4. Country report INDONESIA - MFS II EVALUATIONS

    NARCIS (Netherlands)

    Klaver, D.C.; Kusters, C.S.L.; Pradhan, M.; Vigh, M.; Groot Bruinderink, M.; Rossum, van I.; Böhnke, L.; Wallaart, K.; Malamas, S.; Berkhout, E.; Ni Wayan Suriasatini,; Sikoki, B.; Ginting, M.B.; Mulia, M.; Ningsih, K.; Pujiastuti, S.; Dwi Andari, B.; Suprobo, N.; Priyahita, W.; Sihombing, R.R.; Rokhmatulloh, S.W.; Rosita, I.; Wieriks, M.; Smidt, H.; Nugroho, K.; Prasetyo, K.; Larastiti, C.; Amir, S.; Sutikno,

    2015-01-01

    This report on Indonesia is one of a series of evaluation reports, consisting of ten reports in total, reflecting the results of the jointly-organised MFS II evaluation: - eight country reports (India, Bangladesh, Ethiopia, Uganda, Indonesia, DR Congo, Liberia, Pakistan); - a synthesis report

  5. Country report ETHIOPIA - MFS II EVALUATIONS

    NARCIS (Netherlands)

    Lensink, R.; Asenso-Okyere, K.; Bahiigwa, G.; Cao, De E.; Eriksen, S.; Jemaneh, S.; Gutu, T.; Hansen, N.; Lutz, C.; Tadesse, G.; Tefera, W.; Yirga, C.; Zerfu, E.; Berg, van der M.; Klaver, D.C.; Jacobs, J.; Hofstede, M.; Ingen, van T.; Getew, H.; Tigabu, A.; Babu, S.; Buizer, N.N.; Desalos, C.B.; Kefyalew, D.; Kusters, C.S.L.; Bulte, E.; Pradhan, M.

    2015-01-01

    This report on Ethiopia is one of a series of evaluation reports, consisting of ten reports in total, reflecting the results of the jointly-organised MFS II evaluation: - Eight country reports (India, Bangladesh, Ethiopia, Uganda, Indonesia, DR Congo, Liberia, Pakistan); - A synthesis report

  6. How do radiologists evaluate osteonecrosis?

    Energy Technology Data Exchange (ETDEWEB)

    Lee, G.C.; Steinberg, D. [The University of Pennsylvania, Department of Orthopaedic Surgery, Pereleman School of Medicine, Philadelphia, PA (United States); Penn Presbyterian Medical Center, Philadelphia, PA (United States); Khoury, V.; Kim, W.; Dalinka, M. [The University of Pennsylvania, Department of Radiology, Pereleman School of Medicine, Philadelphia, PA (United States); Hospital of the University of Pennsylvania, Philadelphia, PA (United States); Steinberg, M. [The University of Pennsylvania, Department of Orthopaedic Surgery, Pereleman School of Medicine, Philadelphia, PA (United States); Hospital of the University of Pennsylvania, Philadelphia, PA (United States)

    2014-05-15

    Management of patients with osteonecrosis of the hip remains controversial and challenging. Because the prognosis and treatment are determined in large part by the stage and extent of the disease, it is important to use a reliable and efficient method for evaluation and staging. The objective of this study was to determine how musculoskeletal (MSK) radiologists evaluate osteonecrosis and whether this evaluation is adequate. A 12-part questionnaire was designed to determine how MSK radiologists evaluate patients with osteonecrosis of the femoral head (ONFH). This was sent to 888 members of the Society of Skeletal Radiology. One hundred and twenty-one members responded to essentially all questions. Patients were evaluated using plain radiographs and MRI. All agreed that it is clinically important to determine the extent of necrosis and joint involvement, and 115 (95 %) stated that this should be part of the radiologists' evaluation. However, only 55 (46 %) said that in practice they used a specific system of classification, and most of these used the Ficat and Arlet classification, which does not indicate the extent of involvement. One hundred and seven (88 %) respondents included a simple visual estimate of the extent of involvement, and a small number added a specific measurement of lesion size. The majority indicated that they were infrequently consulted about which imaging studies should be obtained. Although radiologists recognize the clinical importance of determining the extent of necrosis and joint involvement in patients with ONFH, in practice the methods used to evaluate these patients often do not accomplish this satisfactorily. The use of an effective classification, which includes both stage and extent of involvement, should be stressed, as it will lead to improved treatment of patients with ON. Physicians who order imaging studies for patients with ON should be encouraged to consult routinely with their radiology colleagues regarding which studies

  7. Curcumin and normal functioning of joints: evaluation of a health claim pursuant to Article 13(5) of Regulation (EC) No 1924/2006

    DEFF Research Database (Denmark)

    Sjödin, Anders Mikael

    2017-01-01

    on the scientific substantiation of a health claim related to curcumin and normal functioning of joints. The food that is proposed as the subject of the health claim is curcumin. The Panel considers that curcumin is sufficiently characterised. The claimed effect proposed by the applicant is ‘normal functioning...... conducted in patients with osteoarthritis or rheumatoid arthritis and from one study in obese subjects on serum cytokines for the scientific substantiation of the claim. In the absence of evidence for an effect of curcumin on the normal function of joints in humans, the results of the human studies...... on curcumin pharmacokinetics, safety and mechanistic studies, the animal studies and the in vitro studies submitted by the applicant cannot be used as a source of data for the scientific substantiation of the claim. The Panel concludes that a cause and effect relationship has not been established between...

  8. Evaluation of a minimally invasive procedure for sacroiliac joint fusion – an in vitro biomechanical analysis of initial and cycled properties

    Directory of Open Access Journals (Sweden)

    Lindsey DP

    2014-05-01

    Full Text Available Derek P Lindsey,1 Luis Perez-Orribo,2 Nestor Rodriguez-Martinez,2 Phillip M Reyes,2 Anna Newcomb,2 Alexandria Cable,2 Grace Hickam,2 Scott A Yerby,1 Neil R Crawford21SI-BONE, Inc., San Jose, CA, USA; 2Spinal Biomechanics Research Laboratory, Barrow Neurological Institute, St Joseph's Hospital and Medical Center, Phoenix, AZ, USAIntroduction: Sacroiliac (SI joint pain has become a recognized factor in low back pain. The purpose of this study was to investigate the effect of a minimally invasive surgical SI joint fusion procedure on the in vitro biomechanics of the SI joint before and after cyclic loading.Methods: Seven cadaveric specimens were tested under the following conditions: intact, posterior ligaments (PL and pubic symphysis (PS cut, treated (three implants placed, and after 5,000 cycles of flexion–extension. The range of motion (ROM in flexion–extension, lateral bending, and axial rotation was determined with an applied 7.5 N • m moment using an optoelectronic system. Results for each ROM were compared using a repeated measures analysis of variance (ANOVA with a Holm–Šidák post-hoc test.Results: Placement of three fusion devices decreased the flexion–extension ROM. Lateral bending and axial rotation were not significantly altered. All PL/PS cut and post-cyclic ROMs were larger than in the intact condition. The 5,000 cycles of flexion–extension did not lead to a significant increase in any ROMs.Discussion: In the current model, placement of three 7.0 mm iFuse Implants significantly decreased the flexion–extension ROM. Joint ROM was not increased by 5,000 flexion–extension cycles.Keywords: biomechanics, iliosacral, arthrodesis, cadaver

  9. Biochemical and histological evaluation of the synovial-like tissue around failed (loose) total joint replacement prostheses in human subjects and a canine model.

    Science.gov (United States)

    Thornhill, T S; Ozuna, R M; Shortkroff, S; Keller, K; Sledge, C B; Spector, M

    1990-07-01

    The tissue around loose total joint replacement prostheses displays a synovial-like lining comprised of cells that produce IL-1 and PGE2, mediators of inflammation that stimulate bone resorption. Particles of titanium alloy, as well as cobalt-chromium alloy and polyethylene, were found to aggravate the histiocytic response and production of IL-1 and PGE2. Tissue with similar histological and biochemical features was produced in a canine model of the aseptic loose cemented femoral stem.

  10. Photovoltaic evaluation study

    Science.gov (United States)

    Johnson, G.; Heikkilae, M.; Melasuo, T.; Spanner, S.

    Realizing the value and potential of PV-power as well as the growing need for increased cooperation and sharing of knowledge in the field of photovoltaics, FINNIDA and UNICEF decided to undertake a study of selected PV-projects. There were two main objectives for the study: To gather, compile, evaluate and share information on the photovoltaic technology appropriate to developing countries, and to promote the interest and competence of Finnish research institutes, consultants and manufacturers in photovoltaic development. For this purpose a joint evaluation of significant, primarily UN-supported projects providing for the basic needs of rural communities was undertaken. The Gambia and Kenya offered a variety of such projects, and were chosen as target countries for the study. The projects were chosen to be both comparable and complimentary. In the Gambia, the main subject was a partially integrated health and telecommunications project, but a long-operating drinking water pumping system was also studied. In Kenya, a health project in the Turkana area was examined, and also a large scale water pumping installation for fish farming. Field visits were made in order to verify and supplement the data gathered through document research and earlier investigations. Individual data gathering sheets for the project form the core of this study and are intended to give the necessary information in an organized and accessible format. The findings could practically be condensed into one sentence: PV-systems work very well, if properly designed and installed, but the resources and requirements of the recipients must be considered to a higher degree.

  11. Presentation of the EURODELTA III intercomparison exercise – evaluation of the chemistry transport models' performance on criteria pollutants and joint analysis with meteorology

    Directory of Open Access Journals (Sweden)

    B. Bessagnet

    2016-10-01

    Full Text Available The EURODELTA III exercise has facilitated a comprehensive intercomparison and evaluation of chemistry transport model performances. Participating models performed calculations for four 1-month periods in different seasons in the years 2006 to 2009, allowing the influence of different meteorological conditions on model performances to be evaluated. The exercise was performed with strict requirements for the input data, with few exceptions. As a consequence, most of differences in the outputs will be attributed to the differences in model formulations of chemical and physical processes. The models were evaluated mainly for background rural stations in Europe. The performance was assessed in terms of bias, root mean square error and correlation with respect to the concentrations of air pollutants (NO2, O3, SO2, PM10 and PM2.5, as well as key meteorological variables. Though most of meteorological parameters were prescribed, some variables like the planetary boundary layer (PBL height and the vertical diffusion coefficient were derived in the model preprocessors and can partly explain the spread in model results. In general, the daytime PBL height is underestimated by all models. The largest variability of predicted PBL is observed over the ocean and seas. For ozone, this study shows the importance of proper boundary conditions for accurate model calculations and then on the regime of the gas and particle chemistry. The models show similar and quite good performance for nitrogen dioxide, whereas they struggle to accurately reproduce measured sulfur dioxide concentrations (for which the agreement with observations is the poorest. In general, the models provide a close-to-observations map of particulate matter (PM2.5 and PM10 concentrations over Europe rather with correlations in the range 0.4–0.7 and a systematic underestimation reaching −10 µg m−3 for PM10. The highest concentrations are much more underestimated, particularly in

  12. Presentation of the EURODELTA III intercomparison exercise - evaluation of the chemistry transport models' performance on criteria pollutants and joint analysis with meteorology

    Science.gov (United States)

    Bessagnet, Bertrand; Pirovano, Guido; Mircea, Mihaela; Cuvelier, Cornelius; Aulinger, Armin; Calori, Giuseppe; Ciarelli, Giancarlo; Manders, Astrid; Stern, Rainer; Tsyro, Svetlana; García Vivanco, Marta; Thunis, Philippe; Pay, Maria-Teresa; Colette, Augustin; Couvidat, Florian; Meleux, Frédérik; Rouïl, Laurence; Ung, Anthony; Aksoyoglu, Sebnem; María Baldasano, José; Bieser, Johannes; Briganti, Gino; Cappelletti, Andrea; D'Isidoro, Massimo; Finardi, Sandro; Kranenburg, Richard; Silibello, Camillo; Carnevale, Claudio; Aas, Wenche; Dupont, Jean-Charles; Fagerli, Hilde; Gonzalez, Lucia; Menut, Laurent; Prévôt, André S. H.; Roberts, Pete; White, Les

    2016-10-01

    The EURODELTA III exercise has facilitated a comprehensive intercomparison and evaluation of chemistry transport model performances. Participating models performed calculations for four 1-month periods in different seasons in the years 2006 to 2009, allowing the influence of different meteorological conditions on model performances to be evaluated. The exercise was performed with strict requirements for the input data, with few exceptions. As a consequence, most of differences in the outputs will be attributed to the differences in model formulations of chemical and physical processes. The models were evaluated mainly for background rural stations in Europe. The performance was assessed in terms of bias, root mean square error and correlation with respect to the concentrations of air pollutants (NO2, O3, SO2, PM10 and PM2.5), as well as key meteorological variables. Though most of meteorological parameters were prescribed, some variables like the planetary boundary layer (PBL) height and the vertical diffusion coefficient were derived in the model preprocessors and can partly explain the spread in model results. In general, the daytime PBL height is underestimated by all models. The largest variability of predicted PBL is observed over the ocean and seas. For ozone, this study shows the importance of proper boundary conditions for accurate model calculations and then on the regime of the gas and particle chemistry. The models show similar and quite good performance for nitrogen dioxide, whereas they struggle to accurately reproduce measured sulfur dioxide concentrations (for which the agreement with observations is the poorest). In general, the models provide a close-to-observations map of particulate matter (PM2.5 and PM10) concentrations over Europe rather with correlations in the range 0.4-0.7 and a systematic underestimation reaching -10 µg m-3 for PM10. The highest concentrations are much more underestimated, particularly in wintertime. Further evaluation of

  13. Evaluation of Joint Regulation of the Minister of Religion and Minister of Home Affairs No. 9 and 8 of 2006: Study on Maintenance of Religious Harmony Policy

    Directory of Open Access Journals (Sweden)

    Herman Ya'arozatulo Harefa

    2016-05-01

    Full Text Available This study aims to evaluate the implementation of the regulation in the province of East Java. The method used in this study is naturalistic or qualitative with a descriptive explanation. The study result shows that in general, the implementation of the regulation in the province of East Java has not been effective. Factors that affect, among others, are the lack of commitment of in implementing the regulation, weak socialization of the regulation, weak law enforcement,and the lack of multicultural education to the community. The policy that needs to be implemented is mainly of the regulation needs to be improved to become a Law. The approval of the existing Draft Law on the Protection of Religious Community needs to be accelerated.

  14. Evaluation of the joint effect of the incorporation of mechanically deboned meat and grape extract on the formulation of chicken nuggets.

    Science.gov (United States)

    Tournour, Hernán H; Cunha, Luís M; Magalhães, Luís M; Lima, Rui C; Segundo, Marcela A

    2017-06-01

    The proximate composition, instrumental and perceived appearance of chicken nuggets formulated with varying contents of mechanically deboned chicken meat and varying concentrations of grape pomace extract were evaluated, with the choice of formulations following a central composite design. Significant differences (P formulations with higher acceptance scores. Correspondence analysis of open-ended comments complemented the information obtained from overall acceptance, adding valuable descriptive attributes of nugget samples. Thus, addition of grape pomace extract up to 120 mg/kg and mechanically deboned chicken meat up to 15 g/100 g did not adversely affect the perceived appearance of chicken nuggets. Mechanically deboned chicken meat and grape pomace extract can be successfully used for the elaboration of novel products, for different market segments, with healthy connotations highlighted by antioxidant properties retained by the grape pomace extract.

  15. Evaluation and Policy Learning

    DEFF Research Database (Denmark)

    Borrás, Susana; Højlund, Steven

    2015-01-01

    This article examines how evaluation induces policy learning – a question largely neglected by the scholarly literature on evaluation and policy learning. Following a learner's perspective, the article attempts to ascertain who the learners are, and what, and how, learners actually learn from...... evaluations. In so doing, it focuses on what different types of learners actually learn within the context of the evaluation framework (the set of administrative structures defining the evaluation goals and process). Taking the empirical case of three EU programme evaluations, the patterns of policy learning...... emanating from them are examined. The findings are that only two types of actors involved in the evaluation are actually learning (programme units and external evaluators), that learners learn different things (programme overview, small-scale programme adjustments, policy change and evaluation methods...

  16. WE-E-213CD-01: Best in Physics (Joint Imaging-Therapy) - Evaluation of Deformation Algorithm Accuracy with a Two-Dimensional Anatomical Pelvic Phantom.

    Science.gov (United States)

    Kirby, N; Chuang, C; Pouliot, J

    2012-06-01

    To objectively evaluate the accuracy of 11 different deformable registration techniques for bladder filling. The phantom represents an axial plane of the pelvic anatomy. Urethane plastic serves as the bony anatomy and urethane rubber with three levels of Hounsfield units (HU) is used to represent fat and organs, including the prostate. A plastic insert is placed into the phantom to simulate bladder filling. Nonradiopaque markers reside on the phantom surface. Optical camera images of these markers are used to measure the positions and determine the deformation from the bladder insert. Eleven different deformable registration techniques are applied to the full- and empty-bladder computed tomography images of the phantom to calculate the deformation. The applied algorithms include those from MIMVista Software and Velocity Medical Solutions and 9 different implementations from the Deformable Image Registration and Adaptive Radiotherapy Toolbox for Matlab. The distance to agreement between the measured and calculated deformations is used to evaluate algorithm error. Deformable registration warps one image to make it similar to another. The root-mean-square (RMS) difference between the HUs at the marker locations on the empty-bladder phantom and those at the calculated marker locations on the full-bladder phantom is used as a metric for image similarity. The percentage of the markers with an error larger than 3 mm ranges from 3.1% to 28.2% with the different registration techniques. This range is 1.1% to 3.7% for a 7 mm error. The least accurate algorithm at 3 mm is also the most accurate at 7 mm. Also, the least accurate algorithm at 7 mm produces the lowest RMS difference. Different deformation algorithms generate very different results and the outcome of any one algorithm can be misleading. Thus, these algorithms require quality assurance. The two-dimensional phantom is an objective tool for this purpose. © 2012 American Association of Physicists in Medicine.

  17. Composite Load Model Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Ning; Qiao, Hong (Amy)

    2007-09-30

    The WECC load modeling task force has dedicated its effort in the past few years to develop a composite load model that can represent behaviors of different end-user components. The modeling structure of the composite load model is recommended by the WECC load modeling task force. GE Energy has implemented this composite load model with a new function CMPLDW in its power system simulation software package, PSLF. For the last several years, Bonneville Power Administration (BPA) has taken the lead and collaborated with GE Energy to develop the new composite load model. Pacific Northwest National Laboratory (PNNL) and BPA joint force and conducted the evaluation of the CMPLDW and test its parameter settings to make sure that: • the model initializes properly, • all the parameter settings are functioning, and • the simulation results are as expected. The PNNL effort focused on testing the CMPLDW in a 4-bus system. An exhaustive testing on each parameter setting has been performed to guarantee each setting works. This report is a summary of the PNNL testing results and conclusions.

  18. Evaluation of public transport

    DEFF Research Database (Denmark)

    Flyvbjerg, Bent; Kahr, Kjeld; Petersen, Peter Bo

    1986-01-01

    This paper discusses a method to evaluate sceduled, fixed-route public transport. One major evaluation criterion in the method is total travel time, subdivided into walking time, waiting time, time on vehicle, transfer time, and concealed waiting time. The other major criterion is cost incurred...... results suitable to open planning, for instance with citizen participation. Five examples of application of the method are given: (1) evaluation of changes in suburban bus services; (2) evaluation of geographical localities as regards public transport; (3) evaluation of circular bus routes; (4) evaluation...... of flexible work hours versus fixed work hours and, finally; (5) production of user information on transport service....

  19. Evaluation and Evaluating the Community Initiative "URBAN"

    DEFF Research Database (Denmark)

    Alves, Sonia

    2013-01-01

    The relevance of the relationship between evaluation and learning is widely acknowledged; as well as the importance of this learning process to support policy decision making and to judge the value of “what was done”, “how” and “with what results”. Although the activity of evaluation...... is not something new, but a field of knowledge with its own theories and practices, it is important to notice that there is great variability in the tradition and cultures of evaluation between countries. At the European level this issue gained a greater prominence with the publication of the Guide MEANS “Means...... for Evaluating Actions of a Structural Nature”, that in 1999 presented the main guidelines, standards and recommendations of the European Commission for the assessment of socio-economic development programs involving Community funding. Several were the changes proposed by this guide, among others, a greater...

  20. Diagnostic utility of magnetic resonance imaging and radiography in juvenile spondyloarthritis: evaluation of the sacroiliac joints in controls and affected subjects.

    Science.gov (United States)

    Jaremko, Jacob L; Liu, Lei; Winn, Naomi J; Ellsworth, Janet E; Lambert, Robert G W

    2014-05-01

    To compare the utility of radiography and magnetic resonance imaging (MRI) for the diagnosis of juvenile-onset spondyloarthritis in pediatric patients presenting with low back and/or sacroiliac (SI) pain of potentially inflammatory etiology. Radiographs and MRI studies of the SI joints in 26 patients with juvenile spondyloarthritis (JSpA) and 35 controls were assessed independently by 2 radiologists, with discrepancies arbitrated by a third. Radiographs and MRI were blinded and read in separate batches in random order. Erosion was common and was the most useful diagnostic feature on radiography [positive likelihood ratio (LR) = 3.5] and was especially diagnostic of SpA on MRI (LR = 6.7). Subchondral sclerosis was common but was the least specific feature for both modalities. Joint space narrowing had some utility on radiography (LR = 2.0) and MRI (LR = 2.7) but was uncommon and had poor reader reliability. Bone marrow edema (LR = 3.1) and subarticular fat infiltration (LR = 4.5), detectable only on MRI, were both useful features. Global diagnostic impression of MRI (LR = 9.4) had very high utility for the diagnosis of JSpA, exceeding radiography (LR = 4.4) because of superior specificity. In addition, global diagnosis of SpA is much more reliably made on MRI (κ = 0.80) compared to radiography (κ = 0.30). Specificity and reliability of MRI of the SI joints are superior to radiography for the diagnosis of juvenile-onset SpA and, where available, MRI should replace radiography as the first line of investigation.

  1. In Vitro Evaluation of Bacterial Leakage at Implant-Abutment Connection: An 11-Degree Morse Taper Compared to a Butt Joint Connection

    Science.gov (United States)

    Khorshidi, Hooman; Raoofi, Saeed; Moattari, Afagh; Bagheri, Atoosa; Kalantari, Mohammad Hassan

    2016-01-01

    Background and Aim. The geometry of implant-abutment interface (IAI) affects the risk of bacterial leakage and invasion into the internal parts of the implant. The aim of this study was to compare the bacterial leakage of an 11-degree Morse taper IAI with that of a butt joint connection. Materials and Methods. Two implants systems were tested (n = 10 per group): CSM (submerged) and TBR (connect). The deepest inner parts of the implants were inoculated with 2 μL of Streptococcus mutans suspension with a concentration of 108 CFU/mL. The abutments were tightened on the implants. The specimens were stored in the incubator at a temperature of 37°C for 14 days and the penetration of the bacterium in the surrounding area was determined by the observation of the solution turbidity and comparison with control specimens. Kaplan-Meier survival curve was traced for the estimation of bacterial leakage and the results between two groups of implants were statistically analyzed by chi-square test. Results. No case of the implant system with the internal conical connection design revealed bacterial leakage in 14 days and no turbidity of the solution was reported for it. In the system with butt joint implant-abutment connection, 1 case showed leakage on the third day, 1 case on the eighth day, and 5 cases on the 13th day. In total, 7 (70%) cases showed bacterial leakage in this system. Significant differences were found between the two groups of implants based on the incidence of bacterial leakage (p < 0.05). Conclusion. The 11-degree Morse taper demonstrated better resistance to microbial leakage than butt joint connection. PMID:27242903

  2. In Vitro Evaluation of Bacterial Leakage at Implant-Abutment Connection: An 11-Degree Morse Taper Compared to a Butt Joint Connection

    Directory of Open Access Journals (Sweden)

    Hooman Khorshidi

    2016-01-01

    Full Text Available Background and Aim. The geometry of implant-abutment interface (IAI affects the risk of bacterial leakage and invasion into the internal parts of the implant. The aim of this study was to compare the bacterial leakage of an 11-degree Morse taper IAI with that of a butt joint connection. Materials and Methods. Two implants systems were tested (n=10 per group: CSM (submerged and TBR (connect. The deepest inner parts of the implants were inoculated with 2 μL of Streptococcus mutans suspension with a concentration of 108 CFU/mL. The abutments were tightened on the implants. The specimens were stored in the incubator at a temperature of 37°C for 14 days and the penetration of the bacterium in the surrounding area was determined by the observation of the solution turbidity and comparison with control specimens. Kaplan-Meier survival curve was traced for the estimation of bacterial leakage and the results between two groups of implants were statistically analyzed by chi-square test. Results. No case of the implant system with the internal conical connection design revealed bacterial leakage in 14 days and no turbidity of the solution was reported for it. In the system with butt joint implant-abutment connection, 1 case showed leakage on the third day, 1 case on the eighth day, and 5 cases on the 13th day. In total, 7 (70% cases showed bacterial leakage in this system. Significant differences were found between the two groups of implants based on the incidence of bacterial leakage (p<0.05. Conclusion. The 11-degree Morse taper demonstrated better resistance to microbial leakage than butt joint connection.

  3. Development and Validation of Web-based Training Modules for Systematic Evaluation of Active Inflammatory Lesions in the Spine and Sacroiliac Joints in Spondyloarthritis

    DEFF Research Database (Denmark)

    Maksymowych, Walter P; Dhillon, Suhkvinder S; Chiowchanwisawakit, Praveena

    2009-01-01

    OBJECTIVE: Reliable assessment of spinal and sacroiliac joint (SIJ) inflammation on magnetic resonance imaging (MRI) is difficult. We developed 2 Web-based training modules for scoring inflammation by MRI in the spine and SIJ using the SPARCC method. These provide explicit details on methodology...... and define the parameters of abnormalities scored in the spine and SIJ. Our objective was to assess the influence of rigorous standardization of methodology offered by Web-based training modules on the reliability of SPARCC scores for SIJ and spinal inflammation. METHODS: We studied 32 patients randomized 1...

  4. Evaluation of the 1997 Joint National Conference, Women in Engineering Program Advocates Network (WEPAN) and National Association of Minority Engineering Program Administrators (NAMEPA)

    Energy Technology Data Exchange (ETDEWEB)

    Brainard, Suzanne G.

    1997-07-01

    The primary goal of the 1997 Joint National Conference was to unite NAMEPA and WEPAN in a unique collaborative effort to further the cause of increasing the participation of women and minorities in science and engineering. The specific objectives were to: (1) conduct technical and programmatic seminars for institutions desiring to initiate, replicate, or expand women and minorities in engineering program; (2) provide assistance in fundraising and grant writing; (3) profile women in engineering programs of excellence; (4) sponsor inspiring knowledgeable and motivational keynote speakers; and (5) offer a series of workshops focused on a multitude of topics.

  5. Evaluation of knee-joint cartilage and menisci ten years after isolated and combined ruptures of the medial collateral ligament. Investigation by weight-bearing radiography, MR imaging and analysis of proteoglycan fragments in the joint fluid

    Energy Technology Data Exchange (ETDEWEB)

    Lundberg, M. [Univ. Hospital, Linkoeping (Sweden). Dept. of Orthopaedics and Sports Medicine (Sweden); Thuomas, K.Aa. [Univ. Hospital, Linkoeping (Sweden). Dept. of Diagnostic Radiology; Messner, K. [Univ. Hospital, Linkoeping (Sweden). Dept. of Orthopaedics and Sports Medicine (Sweden)

    1997-01-01

    Purpose: To compare radiography, MR imaging, and chemical analysis in posttraumatic knees. Material and Methods: Ten matched pairs with either isolated partial rupture of the medial collateral ligament or combined medial collateral ligament/anterior cruciate ligament rupture were compared with matched controls 10 years after trauma. Weight-bearing radiographys and MR examinations were compared with proteoglycan fragment concentrations in the joint fluid. Results: The chemical analyses were similar in both trauma groups. The radiographs showed mild signs of arthrosis in half the patients with combined injury. MR images showed almost all injuried knees to have degenerative changes of various degrees in the cartilage and menisci. More frequent and more advanced changes were found after combined injury than after isolated injury (p<0.01). There were no changes in the controls. Conclusion: MR imaging is the best method for detecting and differentiating early posttraumatic knee arthrosis. (orig.).

  6. Mechano-transduction effect of shockwaves in the treatment of lumbar facet joint pain: comparative effectiveness evaluation of shockwave therapy, steroid injections and radiofrequency medial branch neurotomy.

    Science.gov (United States)

    Nedelka, Tomas; Nedelka, Jiri; Schlenker, Jakub; Hankins, Christopher; Mazanec, Radim

    2014-01-01

    Lumbar facet joints (FJ) is a common source of low back pain and contributes approximmately on one third of chronic low back pain. Medial branch radiofrequency neurotomy is considered as a gold standard in the treatment of facet joint pain. Corticosteroid injections have also presented effect in FJ pain. As an interventional procedures, they carry not-negligible risk of possible complications including infection, damage to nerve root or medial branch structures. Shockwave therapy (SWT) is a non-invasive method for treatment of various musculoskeletal disorders. Its effect is based on transduction of mechanical energy, transferred to cascade of various biochemical processes in target tissue. Its efficacy was proved in the treatment of different painful conditions. The efficacy of SWT was not yet studied in FJ pain. Aim of our work was to compare the efficacy of SWT against interventional treatment procedures - radiofrequency neurotomy and corticosteroid FJ injections. A retrospective study was done on 62 selected patients with unilateral chronic lumbar facet pain. There were 32 women and 30 men, divided into SWT group, corticosteroid injections group radiofrequency group. Nociceptive and neuropathic pain intensity and severity of pain were measured. Shockwave therapy had shown better longterm results compared to FJ injections group and little inferior efficacy compared to RMBN. We did not observe any adverse effects and complications in SWT group. Moreover, in SWT and RMBN groups, significant longterm improvement in daily activities limitation, was observed. SWT appears to be a safe and perspective option in the treatment of FJ pain with negligible side effects.

  7. Prognostics Performance Evaluation

    Data.gov (United States)

    National Aeronautics and Space Administration — This is the first version of the performance evaluation tool. Evaluation is based on point estimates of the RUL predictions. a more detailed documentation will be...

  8. ITS evaluations and activities.

    Science.gov (United States)

    2010-01-01

    Evaluations are critical in promoting innovative practices which may help to provide a safe and efficient transportation system. By conducting such evaluations, we develop quantifiable measures for those in policy development to appreciate and compre...

  9. Organizational use of evaluations

    DEFF Research Database (Denmark)

    Hansson, Finn

    2004-01-01

    Organizations perform evaluations in order to demonstrate their trustworthiness to theoutside world and to produce knowledge for use by the management of the organization.In the planning and application of specific evaluations in the organization, differentparticipants or stakeholders very often...... disclose different, hidden or conflicting agendas.In recent years, the use of evaluations in organizations has grown rapidly and we havewitnessed the rise of a new bureaucratic instrument in the realm of knowledgeproduction in organizations, viz., internal evaluations. Such evaluations produce a set ofdata...... as part of the evaluation process and the long-term impact of this new systematicallyorganised set of data on organizational activities are normally not taken seriously intoconsideration when the use of evaluations in organizations are discussed. Saiddifferently, evaluations have become a major factor...

  10. Comprehensive Psychiatric Evaluation

    Science.gov (United States)

    ... Guide - Table of Contents Facts For Families Guide - View by Topic Chinese Facts for Families Guide ... Psychiatric Evaluation No. 52; Updated October 2017 Evaluation by a child and adolescent psychiatrist is appropriate for any child or adolescent ...

  11. Evaluating clinicians’ teaching performance

    NARCIS (Netherlands)

    Boerebach, B.C.M.

    2014-01-01

    The focus of this thesis is evaluations of clinicians’ teaching performance in postgraduate medical education in the Netherlands. More specifically we studied formative evaluations, which clinicians use to generate a critical appraisal of their performance for their personal development. Research

  12. Technical and systems evaluations

    Energy Technology Data Exchange (ETDEWEB)

    Skolnik, E.G.; DiPietro, J.P. [Energetics, Inc., Washington, DC (United States)

    1998-08-01

    During FY 1998 Energetics performed a variety of technology-based evaluations for the Hydrogen Program. Three evaluations are summarized below: hydrogen bromine-based electricity storage, carbon-based hydrogen storage, and hydrogen-fueled buses.

  13. Airborne Evaluation Facility

    Data.gov (United States)

    Federal Laboratory Consortium — AFRL's Airborne Evaluation Facility (AEF) utilizes Air Force Aero Club resources to conduct test and evaluation of a variety of equipment and concepts. Twin engine...

  14. Zambia - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The MCC commissioned this ex post evaluation to provide an objective and rigorous assessment of the effectiveness and efficacy of ZTP activities. The evaluation team...

  15. A prospective study on predicting local recurrence of giant cell tumour of bone by evaluating preoperative imaging features of the tumour around the knee joint.

    Science.gov (United States)

    He, Yifeng; Wang, Jun; Zhang, Ji; Yuan, Fei; Ding, Xiaoyi

    2017-07-01

    To evaluate the role of medical imaging in predicting local recurrence of giant cell tumour of bone (GCTB) by assessing the preoperative imaging features of GCTB around the knee. Forty-eight consecutive GCTBs in the proximal tibia and distal femur treated with curettage were prospectively enrolled. Patients were grouped in terms of their imaging features on radiography, computed tomography (CT) and magnetic resonance imaging (MRI). All patients were followed up for at least two years after surgery. The association between preoperative imaging features and local recurrence was investigated. Imaging features were retrospectively studied by correlation analysis. The differences between rates were tested by the Chi square and Fisher exact tests; independent factors were determined by multivariate logistic regression analysis. Cystic change and adjacent soft tissue invasion were associated with a higher rate of local recurrence compared to the negative groups (P soap bubble" sign and the fluid-fluid level (P soap bubble" sign was correlated with osteosclerosis and the fluid-fluid level (P < 0.05); cortical bone involvement was correlated with adjacent soft tissue invasion (P < 0.05); and cystic change was correlated with the fluid-fluid level (P < 0.05). Cystic change was an independent risk factor for local recurrence of GCTB. Adjacent soft tissue invasion might indirectly relate to local relapse. A cluster of association relationships between imaging features was revealed.

  16. Diagnosis of periprosthetic infection following total hip arthroplasty--evaluation of the diagnostic values of pre- and intraoperative parameters and the associated strategy to preoperatively select patients with a high probability of joint infection.

    Science.gov (United States)

    Müller, Michael; Morawietz, Lars; Hasart, Olaf; Strube, Patrick; Perka, Carsten; Tohtz, Stephan

    2008-07-21

    The correct diagnosis of a prosthetic joint infection (PJI) is crucial for adequate surgical treatment. The detection may be a challenge since presentation and preoperative tests are not always obvious and precise. This prospective study was performed to evaluate a variety of pre- and intraoperative investigations. Furthermore a detailed evaluation of concordance of each preoperative diagnosis was performed, together with a final diagnosis to assess the accuracy of the pre-operative assumption of PJI. Between 01/2005 and 02/2007, a prospective analysis was performed in 50 patients, who had a two stage revision because of assumed PJI. Based on clinical presentation, radiography, haematological screening, or early failure, infection was assumed and a joint aspiration was performed. Depending upon these findings, a two stage revision was performed, with intra-operative samples for culture and histological evaluation obtained. Final diagnosis of infection was based upon the interpretation of the clinical presentation and the pre- and intraoperative findings. In 37 patients a positive diagnosis of PJI could be made definitely. The histopathology yielded the highest accuracy (0.94) in identification of PJI and identified 35 of 37 infections (sensitivity 0.94, specificity 0.94, positive-/negative predictive value 0.97/0.86). Intra-operative cultures revealed sensitivities, specificities, positive-/negative predictive values and accuracy of 0.78, 0.92, 0.96, 0.63 and 0.82. These values for blood screening tests were 0.95, 0.62, 0.88, 0.80, and 0.86 respectively for the level of C-reactive protein, and 0.14, 0.92, 0.83, 0.29 and, 0.34 respectively for the white blood-cell count. The results of aspiration were 0.57, 0.5, 0.78, 0.29, and 0.54. The detection of PJI is still a challenge in clinical practice. The histopathological evaluation emerges as a highly practical diagnostic tool in detection of PJI. Furthermore, we found a discrepancy between the pre-operative suspicion

  17. Diagnosis of periprosthetic infection following total hip arthroplasty – evaluation of the diagnostic values of pre- and intraoperative parameters and the associated strategy to preoperatively select patients with a high probability of joint infection

    Directory of Open Access Journals (Sweden)

    Perka Carsten

    2008-07-01

    Full Text Available Abstract Background The correct diagnosis of a prosthetic joint infection (PJI is crucial for adequate surgical treatment. The detection may be a challenge since presentation and preoperative tests are not always obvious and precise. This prospective study was performed to evaluate a variety of pre- and intraoperative investigations. Furthermore a detailed evaluation of concordance of each preoperative diagnosis was performed, together with a final diagnosis to assess the accuracy of the pre-operative assumption of PJI. Methods Between 01/2005 and 02/2007, a prospective analysis was performed in 50 patients, who had a two stage revision because of assumed PJI. Based on clinical presentation, radiography, haematological screening, or early failure, infection was assumed and a joint aspiration was performed. Depending upon these findings, a two stage revision was performed, with intra-operative samples for culture and histological evaluation obtained. Final diagnosis of infection was based upon the interpretation of the clinical presentation and the pre- and intraoperative findings. Results In 37 patients a positive diagnosis of PJI could be made definitely. The histopathology yielded the highest accuracy (0.94 in identification of PJI and identified 35 of 37 infections (sensitivity 0.94, specificity 0.94, positive-/negative predictive value 0.97/0.86. Intra-operative cultures revealed sensitivities, specificities, positive-/negative predictive values and accuracy of 0.78, 0.92, 0.96, 0.63 and 0.82. These values for blood screening tests were 0.95, 0.62, 0.88, 0.80, and 0.86 respectively for the level of C-reactive protein, and 0.14, 0.92, 0.83, 0.29 and, 0.34 respectively for the white blood-cell count. The results of aspiration were 0.57, 0.5, 0.78, 0.29, and 0.54. Conclusion The detection of PJI is still a challenge in clinical practice. The histopathological evaluation emerges as a highly practical diagnostic tool in detection of PJI

  18. Evaluating music emotion recognition

    DEFF Research Database (Denmark)

    Sturm, Bob L.

    2013-01-01

    A fundamental problem with nearly all work in music genre recognition (MGR)is that evaluation lacks validity with respect to the principal goals of MGR. This problem also occurs in the evaluation of music emotion recognition (MER). Standard approaches to evaluation, though easy to implement, do...... not reliably differentiate between recognizing genre or emotion from music, or by virtue of confounding factors in signals (e.g., equalization). We demonstrate such problems for evaluating an MER system, and conclude with recommendations....

  19. The examination of the musculoskeletal system based only on the evaluation of pelvic-hip complex muscle and trunk flexibility may lead to failure to screen children for generalized joint hypermobility.

    Science.gov (United States)

    Czaprowski, Dariusz; Kędra, Agnieszka; Pawłowska, Paulina; Kolwicz-Gańko, Aleksandra; Leszczewska, Justyna; Tyrakowski, Marcin

    2015-01-01

    The aim of the study was to evaluate whether the clinical assessment of the pelvic-hip complex muscle and trunk flexibility is sufficient for diagnosing generalized joint hypermobility (GJH). A cross-sectional study. Center of Body Posture in Olsztyn, North East Poland. The study included 136 females and 113 males aged 10-13 years. In order to assess muscle flexibility, the straight leg raise (SLR) test (for hamstring) and modified Thomas test for one- (O-JHF) and two-joint (T-JHF) hip flexors were performed. To evaluate trunk flexibility the fingertip-to-floor (FTF) and lateral trunk flexion (LTF) tests were used. The GJH occurrence was assessed with the use of nine-point Beighton scale (threshold value ≥5 points for females, ≥4 for males). The analysis was carried out separately for females and males. There were no significant differences between females with versus without GJH, and males with versus without GJH regarding SLR (p = 0.86, p = 0.19 for females and males, respectively), O-JHF (p = 0.89, p = 0.35 for females and males, respectively), T-JHF (p = 0.77, p = 0.4 for females and males, respectively), FTF (p = 0.19, p = 0.84 for females and males, respectively) and LTF (p = 0.58, p = 0.35 for females and males, respectively) tests results. Clinical examination of the pelvic-hip complex muscles and trunk flexibility by use of SLR, O-JHF, T-JHF, FTF and LTF revealed to be insufficient in diagnosing GJH in children aged 10-13 years. Thus, the Beighton scale should be considered a standard element of physiotherapeutic examination of the musculoskeletal system in children and youth.

  20. The examination of the musculoskeletal system based only on the evaluation of pelvic-hip complex muscle and trunk flexibility may lead to failure to screen children for generalized joint hypermobility.

    Directory of Open Access Journals (Sweden)

    Dariusz Czaprowski

    Full Text Available The aim of the study was to evaluate whether the clinical assessment of the pelvic-hip complex muscle and trunk flexibility is sufficient for diagnosing generalized joint hypermobility (GJH.A cross-sectional study.Center of Body Posture in Olsztyn, North East Poland.The study included 136 females and 113 males aged 10-13 years.In order to assess muscle flexibility, the straight leg raise (SLR test (for hamstring and modified Thomas test for one- (O-JHF and two-joint (T-JHF hip flexors were performed. To evaluate trunk flexibility the fingertip-to-floor (FTF and lateral trunk flexion (LTF tests were used. The GJH occurrence was assessed with the use of nine-point Beighton scale (threshold value ≥5 points for females, ≥4 for males. The analysis was carried out separately for females and males.There were no significant differences between females with versus without GJH, and males with versus without GJH regarding SLR (p = 0.86, p = 0.19 for females and males, respectively, O-JHF (p = 0.89, p = 0.35 for females and males, respectively, T-JHF (p = 0.77, p = 0.4 for females and males, respectively, FTF (p = 0.19, p = 0.84 for females and males, respectively and LTF (p = 0.58, p = 0.35 for females and males, respectively tests results.Clinical examination of the pelvic-hip complex muscles and trunk flexibility by use of SLR, O-JHF, T-JHF, FTF and LTF revealed to be insufficient in diagnosing GJH in children aged 10-13 years. Thus, the Beighton scale should be considered a standard element of physiotherapeutic examination of the musculoskeletal system in children and youth.

  1. Ideal evaluation from coevolution.

    Science.gov (United States)

    de Jong, Edwin D; Pollack, Jordan B

    2004-01-01

    In many problems of interest, performance can be evaluated using tests, such as examples in concept learning, test points in function approximation, and opponents in game-playing. Evaluation on all tests is often infeasible. Identification of an accurate evaluation or fitness function is a difficult problem in itself, and approximations are likely to introduce human biases into the search process. Coevolution evolves the set of tests used for evaluation, but has so far often led to inaccurate evaluation. We show that for any set of learners, a Complete Evaluation Set can be determined that provides ideal evaluation as specified by Evolutionary Multi-Objective Optimization. This provides a principled approach to evaluation in coevolution, and thereby brings automatic ideal evaluation within reach. The Complete Evaluation Set is of manageable size, and progress towards it can be accurately measured. Based on this observation, an algorithm named DELPHI is developed. The algorithm is tested on problems likely to permit progress on only a subset of the underlying objectives. Where all comparison methods result in overspecialization, the proposed method and a variant achieve sustained progress in all underlying objectives. These findings demonstrate that ideal evaluation may be approximated by practical algorithms, and that accurate evaluation for test-based problems is possible even when the underlying objectives of a problem are unknown. Copryright 2004 Massachusetts Institute of Technology

  2. Technology Enhanced Teacher Evaluation

    Science.gov (United States)

    Teter, Richard B.

    2010-01-01

    The purpose of this research and development study was to design and develop an affordable, computer-based, pre-service teacher assessment and reporting system to allow teacher education institutions and supervising teachers to efficiently enter evaluation criteria, record pre-service teacher evaluations, and generate evaluation reports. The…

  3. Grounding Evaluations in Culture

    Science.gov (United States)

    Samuels, Maurice; Ryan, Katherine

    2011-01-01

    The emergence of and the attention given to culture in the evaluation field over the last decade has created a heightened awareness of and need for evaluators to understand the complexity and multidimensionality of evaluations within multicultural, multiracial, and cross-cultural contexts. In this article, the authors discuss how cultural…

  4. The decision evaluation scales

    NARCIS (Netherlands)

    Stalmeier, PFM; Roosmalen, MS; Verhoef, LCG; Hoekstra-Weebers, JEHM; Oosterwijk, JC; Moog, U; Hoogerbrugge, N; van Daal, WAJ

    There are several instruments to assess how patients evaluate their medical treatment choice. These are used to evaluate decision aids. Our objective is to investigate which psychological factors play a role when patients evaluate their medical treatment choices. A pool of 36 items was constructed,

  5. CAPTURED India Country Evaluation

    NARCIS (Netherlands)

    O'Donoghue, R.; Brouwers, J.H.A.M.

    2012-01-01

    This report provides the findings of the India Country Evaluation and is produced as part of the overall CAPTURED End Evaluation. After five years of support by the CAPTURED project the End Evaluation has assessed that results are commendable. I-AIM was able to design an approach in which health

  6. Evaluating meeting support tools

    NARCIS (Netherlands)

    Post, W.M.; Huis in 't Veld, M. M.A.; Boogaard, S.A.A. van den

    2007-01-01

    Many attempts are underway for developing meeting support tools, but less attention is paid to the evaluation of meetingware. This article describes the development and testing of an instrument for evaluating meeting tools. First, we specified the object of evaluation -meetings- by means of a set of

  7. Evaluating meeting support tools

    NARCIS (Netherlands)

    Post, W.M.; Huis in't Veld, M.A.A.; Boogaard, S.A.A. van den

    2008-01-01

    Many attempts are underway for developing meeting support tools, but less attention is paid to the evaluation of meetingware. This article describes the development and testing of an instrument for evaluating meeting tools. First, we specified the object of evaluation - meetings - by means of a set

  8. Creating legacy through evaluation

    DEFF Research Database (Denmark)

    Degn, Hans-Peter; Lynghøj, Hanne; Hansen, Louise Ejgod

    is how to stimulate cultural legacy in certain directions through the emphasis of specific values in the strategic objectives and evaluation criteria. Another perspective is how, to whom and for what purpose evaluation results are reported and implemented, and thus how evaluation may affect design, aims...

  9. Evaluation, Language, and Untranslatables

    Science.gov (United States)

    Dahler-Larsen, Peter; Abma, Tineke; Bustelo, María; Irimia, Roxana; Kosunen, Sonja; Kravchuk, Iryna; Minina, Elena; Segerholm, Christina; Shiroma, Eneida; Stame, Nicoletta; Tshali, Charlie Kabanga

    2017-01-01

    The issue of translatability is pressing in international evaluation, in global transfer of evaluative instruments, in comparative performance management, and in culturally responsive evaluation. Terms that are never fully understood, digested, or accepted may continue to influence issues, problems, and social interactions in and around and after…

  10. Current guidelines for the evaluation and management of atopic dermatitis: A comparison of the Joint Task Force Practice Parameter and American Academy of Dermatology guidelines.

    Science.gov (United States)

    Eichenfield, Lawrence F; Ahluwalia, Jusleen; Waldman, Andrea; Borok, Jenna; Udkoff, Jeremy; Boguniewicz, Mark

    2017-04-01

    Atopic dermatitis (AD) is a chronic pruritic inflammatory disease that commonly presents in the pediatric population. Although definitions and diagnosis of AD have largely been agreed upon, allergists and dermatologists have similar and divergent approaches to the management of AD. This review facilitated integration of the American Academy of Allergy, Asthma & Immunology/American College of Allergy, Asthma & Immunology Joint Task Force 2012 AD Practice Parameter and the 2014 American Academy of Dermatology guidelines to highlight the basic principles of AD management and discuss therapies and management of AD from the distinct perspectives of the allergist and dermatologist. Copyright © 2017 American Academy of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.

  11. Nature and origin of white efflorescence on bricks, artificial stones, and joint mortars of modern houses evaluated by portable Raman spectroscopy and laboratory analyses.

    Science.gov (United States)

    Morillas, Héctor; Maguregui, Maite; Trebolazabala, Josu; Madariaga, Juan Manuel

    2015-02-05

    Bricks and mortar currently constitute one of the most important building materials used in the construction of most modern facades. The deterioration of these materials is caused primarily by the impact of numerous external stressors, while poor manufacturing quality, particularly of mortars, can also contribute to this process. In this work, the non-invasive Raman spectroscopy technique was used to identify the recently formed deterioration compounds (primarily sulfates and nitrates) in bricks, artificial stones, and joint mortars from detached houses in the Bilbao metropolitan area (Basque Country, North of Spain), as well as to investigate the deterioration processes taking place in these materials. Additionally, to confirm and in some cases complement the results obtained with Raman spectroscopy, SEM-EDS and XRD measurements were also carried out. Copyright © 2014 Elsevier B.V. All rights reserved.

  12. Interprofessional peer-assisted learning as a low-threshold course for joint learning: Evaluation results of the interTUT Project

    Directory of Open Access Journals (Sweden)

    Reichel, Kathrin

    2016-04-01

    Full Text Available Background and objective: The delivery of needs-based health care services requires a team-based and collaborative approach of different health professionals, which is not yet sufficienctliy implemented on a day to day basis. Interprofessional learning activities aim to respond to this in future. The cross-university pilot project interTUT used peer-assisted learning approaches and extracurricular tutorials in order address this issue.Methodology: During the pilot phase, eight students and trainees have been acquired. Together, they prepared and led four extracurricular tutorials on core topics of interprofessional cooperation and documented them in procedure manuals. The course was evaluated using a standardized participant survey (n=72 and two focus groups (n=3, n=5 in which participants were asked to reflect on their individual learning experiences. Descriptive statistics were used to analyze the survey data and the focus group material was interpreted using qualitative content analysis. Results: The results indicated a high level of satisfaction, acceptance of and further demand for peer-supported learning activities. The students and trainees reported changed attitudes and subjective knowledge growth regarding the other professional groups. The constructive learning atmosphere as well as having access to a forum for interprofessional exchange were equally valued.Conclusions: Extracurricular tutorials offer a low-threshold and very promising point of contact for the facilitation of interprofessional teaching and learning. However, this should be viewed against the background that, as part of the pilot project, only a small number of students and trainees who were already interested in the topic could be reached by this optional course. A comprehensive, long-term trial of this teaching and learning format, its linkage to curricular courses, and further research on its education-specific and practice-related effects are, therefore, necessary.

  13. Mechanical evaluation of hydrogen peroxide gas plasma sterilization of nylon lines used for extra-articular stabilization of the canine stifle joint.

    Science.gov (United States)

    Gatineau, Matthieu; Huneault, Louis; Lussier, Bertrand; Lefevre-Lavoie, Josiane

    2010-01-01

    To compare the effects of hydrogen peroxide gas plasma (HPGP) and ethylene oxide (EO) sterilizations on the mechanical properties of nylon lines used for stabilization of the canine stifle. Secondarily, to compare the performance of crimped and knotted lines. In vitro mechanical evaluation. Nonsterilized, EO- and HPGP-sterilized specimens of 36.3 kg test nylon leader line (NLL) and 57.8 kg test nylon fishing line (NFL). Single strands and looped specimens of NLL or NFL were positioned on a material testing machine. To create looped specimens, NLL were crimped using the Securos system, and NFL were knotted, as used clinically. Elongation (%) and ultimate load (N) variables were studied. Elongation and ultimate load of NLL groups were not significantly different between EO and HPGP. For NFL, HPGP sterilization led to slightly greater elongation than EO in loops only. Ultimate load of NFL single strands was not significantly different between EO and HPGP, but was higher after HPGP compared with EO in NFL loops. All NLL groups had less elongation and ultimate load than NFL. The effects of HPGP on NLL compared positively to EO, making HPGP an attractive alternative. As HPGP led to a slightly greater elongation of NFL than EO, the latter could be favored to sterilize NFL. Crimped NLL minimized elongation better than knotted NFL. Sterilization with HPGP seems a good alternative to EO for NLL. EO may be a better choice for NFL; however, it is difficult to judge the clinical relevance of this result. Crimped NLL minimizes elongation and may help reducing the recurrence of stifle instability postoperatively.

  14. Pull strength evaluation of Sn-Pb solder joints made to Au-Pt-Pd and Au thick film structures on low-temperature co-fired ceramic -final report for the MC4652 crypto-coded switch (W80).

    Energy Technology Data Exchange (ETDEWEB)

    Uribe, Fernando; Vianco, Paul Thomas; Zender, Gary L.

    2006-06-01

    A study was performed that examined the microstructure and mechanical properties of 63Sn-37Pb (wt.%, Sn-Pb) solder joints made to thick film layers on low-temperature co-fired (LTCC) substrates. The thick film layers were combinations of the Dupont{trademark} 4596 (Au-Pt-Pd) conductor and Dupont{trademark} 5742 (Au) conductor, the latter having been deposited between the 4596 layer and LTCC substrate. Single (1x) and triple (3x) thicknesses of the 4596 layer were evaluated. Three footprint sizes were evaluated of the 5742 thick film. The solder joints exhibited excellent solderability of both the copper (Cu) lead and thick film surface. In all test sample configurations, the 5742 thick film prevented side wall cracking of the vias. The pull strengths were in the range of 3.4-4.0 lbs, which were only slightly lower than historical values for alumina (Al{sub 2}O{sub 3}) substrates. General (qualitative) observations: (a) The pull strength was maximized when the total number of thick film layers was between two and three. Fewer that two layers did not develop as strong of a bond at the thick film/LTCC interface; more than three layers and of increased footprint area, developed higher residual stresses at the thick film/LTCC interface and in the underlying LTCC material that weakened the joint. (b) Minimizing the area of the weaker 4596/LTCC interface (e.g., larger 5742 area) improved pull strength. Specific observations: (a) In the presence of vias and the need for the 3x 4596 thick film, the preferred 4596:5742 ratio was 1.0:0.5. (b) For those LTCC components that require the 3x 4596 layer, but do not have vias, it is preferred to refrain from using the 5742 layer. (c) In the absence of vias, the highest strength was realized with a 1x thick 5742 layer, a 1x thick 4596 layer, and a footprint ratio of 1.0:1.0.

  15. Evaluating human resource interventions

    Directory of Open Access Journals (Sweden)

    Joha Louw-Potgieter

    2012-07-01

    Full Text Available Orientation: Programme evaluation is a transdiscipline, which examines whether a programme has merit or not. A programme is a coherent set of activities aimed at bringing about a change in people or their circumstances.Research purpose: The purpose of this special edition is to introduce readers to the evaluation of human resource (HR programmes.Motivation for the study: There are few comprehensive evaluations of HR programmes despite many publications on functional efficiency measures of HR (i.e. measures of cost, time, quantity, error and quality.Research design, approach and method: This article provides a value chain for HR activities and introduces the reader to programme theory-driven evaluation.Main findings: In summarising all of the contributions in this edition, one of the main findings was the lack of programme evaluation experience within HR functions and the difficulty this posed for the evaluators.Practical/managerial implications: This introductory article presents answers to two simple questions: What does HR do? and, What is programme evaluation? These answers will enable practitioners to understand what programme evaluators mean when we say that programme evaluation seeks to determine the merit of a programme.Contribution/value-add: The main contribution of this introductory article is to set the scene for the HR evaluations that follow. It alerts the reader to the rich theory contribution in HR literature and how to apply this in a theory-driven evaluation.

  16. Supplier Evaluation Processes

    DEFF Research Database (Denmark)

    Hald, Kim Sundtoft; Ellegaard, Chris

    2011-01-01

    Purpose – The purpose of this paper is to illuminate how supplier evaluation practices are linked to supplier performance improvements. Specifically, the paper investigates how performance information travelling between the evaluating buyer and the evaluated suppliers is shaped and reshaped...... in the evaluation process. Design/methodology/approach – The paper relies on a multiple, longitudinal case research methodology. The two cases show two companies' efforts in designing, implementing, and using supplier evaluation in order to improve supplier performance. Findings – The findings show how the dynamics...... of representing, reducing, amplifying, dampening, and directing shape and reshape supplier evaluation information. In both companies, evaluation practices were defined, redefined, and re-directed by the involved actors' perception and decision making, as well as organisational structures, IT systems...

  17. The IIR evaluation model

    DEFF Research Database (Denmark)

    Borlund, Pia

    2003-01-01

    of IIR systems as realistically as possible with reference to actual information searching and retrieval processes, though still in a relatively controlled evaluation environment; and 2) to calculate the IIR system performance taking into account the non-binary nature of the assigned relevance......An alternative approach to evaluation of interactive information retrieval (IIR) systems, referred to as the IIR evaluation model, is proposed. The model provides a framework for the collection and analysis of IR interaction data. The aim of the model is two-fold: 1) to facilitate the evaluation...... assessments. The IIR evaluation model is presented as an alternative to the system-driven Cranfield model (Cleverdon, Mills & Keen, 1966; Cleverdon & Keen, 1966) which still is the dominant approach to the evaluation of IR and IIR systems. Key elements of the IIR evaluation model are the use of realistic...

  18. 40 CFR 35.515 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.515....515 Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional... work plan (see section 35.507(b)(2)(iv)). A description of the evaluation process and reporting...

  19. 40 CFR 35.115 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.115... Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional Administrator will... description of the evaluation process and a reporting schedule must be included in the work plan (see § 35.107...

  20. Evaluation of Mechanical Properties of Alloy 82/182 Weld Joint Between SA508 Gr.3 Nozzle and F316L Safe-End

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jin Weon [Chosun University, Gwangju (Korea, Republic of); Lee, Kyung Soo; Park, Chi Yong [Korea Electric Power Research Institute, Daejeon (Korea, Republic of)

    2010-03-15

    This paper presents the distributions of the tensile and fracture properties of an alloy 82/182 dissimilar weld joint between an SA508 Gr.3 nozzle and F316L SS safe-end at ambient temperature. Tensile and J-R tests were conducted using specimens extracted from base metals, heat-affected zones (HAZs), buttering regions, and various regions of the weld metal. The results show that the root region of the weld has higher strength than the upper region. The yield and tensile strengths vary considerably within the root region of the weld. The buttering region had the lowest strengths. The strengths gradually increased as the F316L stainless steel weld boundary was approached. The variation of the strengths within the upper region of the weld is insignificant. The fracture toughness of the alloy 82/182 weld metal is less than those of both the base metals and both HAZs. Within the alloy 82/182 weld, the center of weld has a slightly lower fracture toughness than the weld boundary and buttering region, and the root region has greater toughness than the upper region of the weld.

  1. Evaluation of the 8th edition American Joint Commission on Cancer (AJCC) staging system for patients with intrahepatic cholangiocarcinoma: A surveillance, epidemiology, and end results (SEER) analysis.

    Science.gov (United States)

    Kim, Yuhree; Moris, Dimitrios P; Zhang, Xu-Feng; Bagante, Fabio; Spolverato, Gaya; Schmidt, Carl; Dilhoff, Mary; Pawlik, Timothy M

    2017-06-12

    The objective of this study was to assess the prognostic performance of American Joint Committee on Cancer (AJCC) 8th edition in patients with intrahepatic cholangiocarcinoma (ICC) using a cancer registry. The Surveillance, Epidemiology, and End Results (SEER) cancer registry was queried to identify 1008 patients who underwent surgical resection of ICC during 1998-2013. Kaplan-Meier method and Cox proportional hazards regression models were used to analyze long-term survival. The relative discriminative abilities were assessed using the Harrell's concordance index. Median patient age was 62 years and 47.6% of the patients were male. Most tumors were T1 or T2 (n = 413, 41.0% and n = 329, 32.6%, respectively) and 22.1% of patients had lymph node (LN) metastasis. Median tumor size was 5.5 cm. With a median follow-up of 18 months, median survival was 27 months and 5-year OS was 30.6%. The OS c-index for the AJCC 8th staging system was 0.669, which was comparable with the c-index for the 7th edition AJCC staging system (c-index: 0.667); the AJCC 8th-edition did provide more discrete stratification of patients. The new AJCC 8th-edition staging system for ICC was largely comparable to the 7th-edition version and did not provide a marked improvement in overall prognostic discrimination. © 2017 Wiley Periodicals, Inc.

  2. Personality influences quality of life assessments in adult patients after allogeneic hematopoietic stem cell transplantation – Results from a joint evaluation of the prospective German Multicenter Validation Trial and the Fred Hutchinson Cancer Research Center

    Science.gov (United States)

    Herzberg, Philipp Y.; Lee, Stephanie J.; Heussner, Pia; Mumm, Friederike H.A.; Hilgendorf, Inken; von Harsdorf, Stephanie; Hemmati, Philipp; Rieger, Kathrin; Greinix, Hildegard T.; Freund, Mathias; Holler, Ernst; Wolff, Daniel

    2014-01-01

    The influence of personality on health related quality of life (QoL) and physical functioning in the setting of allogeneic hematopoietic stem cell transplantation (alloHSCT) is unknown. We conducted a joint evaluation within two independent cohorts of alloHSCT recipients to investigate the impact of personality on reported quality of life and physical functioning. Two-hundred-eight patients (median age 44 years, range 18–72) (cohort 1) and 93 patients (median age 55 years, range 19–79) (cohort 2) after alloHSCT were evaluated. Personality was assessed using the 24-AM, which measures the Big-Five personality domains and the Life Orientation Test-Revised (LOT-R), measuring optimism and pessimism. QoL was measured using the FACT-BMT, SF36, the human activity profile (HAP) as well as the NIH criteria based cGVHD activity assessment form and the Lee cGVHD symptom-scale. Neuroticism was significantly associated with worse function measured by the HAP and FACT-BMT. Optimism significantly improved QoL captured by the FACT-BMT. Pessimism significantly impaired physical function captured by the HAP and SF-36. Extraversion was significantly associated with reduced depression and lower severity of cGVHD symptoms reported by the patient and physician. The results suggest that personality traits and pre-treatment QoL assessments should be measured in clinical trials to facilitate interpretability of QoL data. PMID:22609882

  3. Public health interventions: evaluating the economic evaluations

    Directory of Open Access Journals (Sweden)

    Martin Forster

    2013-10-01

    Full Text Available Recent years have witnessed much progress in the incorporation of economic considerations into the evaluation of public health interventions. In England, the Centre for Public Health Excellence within the National Institute for Health and Care Excellence works to develop guidance for preventing illness and assessing which public health interventions are most effective and provide best value for money...

  4. EVALUATION OF WAVELET AND NON-LOCAL MEAN DENOISING OF TERRESTRIAL LASER SCANNING DATA FOR SMALL-SCALE JOINT ROUGHNESS ESTIMATION

    Directory of Open Access Journals (Sweden)

    M. Bitenc

    2016-06-01

    Full Text Available Terrestrial Laser Scanning (TLS is a well-known remote sensing tool that enables precise 3D acquisition of surface morphology from distances of a few meters to a few kilometres. The morphological representations obtained are important in engineering geology and rock mechanics, where surface morphology details are of particular interest in rock stability problems and engineering construction. The actual size of the discernible surface detail depends on the instrument range error (noise effect and effective data resolution (smoothing effect. Range error can be (partly removed by applying a denoising method. Based on the positive results from previous studies, two denoising methods, namely 2D wavelet transform (WT and non-local mean (NLM, are tested here, with the goal of obtaining roughness estimations that are suitable in the context of rock engineering practice. Both methods are applied in two variants: conventional Discrete WT (DWT and Stationary WT (SWT, classic NLM (NLM and probabilistic NLM (PNLM. The noise effect and denoising performance are studied in relation to the TLS effective data resolution. Analyses are performed on the reference data acquired by a highly precise Advanced TOpometric Sensor (ATOS on a 20x30 cm rock joint sample. Roughness ratio is computed by comparing the noisy and denoised surfaces to the original ATOS surface. The roughness ratio indicates the success of all denoising methods. Besides, it shows that SWT oversmoothes the surface and the performance of the DWT, NLM and PNLM vary with the noise level and data resolution. The noise effect becomes less prominent when data resolution decreases.

  5. The Use of Functional Data Analysis to Evaluate Activity in a Spontaneous Model of Degenerative Joint Disease Associated Pain in Cats

    Science.gov (United States)

    Gruen, Margaret E.; Alfaro-Córdoba, Marcela; Thomson, Andrea E.; Worth, Alicia C.; Staicu, Ana-Maria; Lascelles, B. Duncan X.

    2017-01-01

    Introduction and objectives Accelerometry is used as an objective measure of physical activity in humans and veterinary species. In cats, one important use of accelerometry is in the study of therapeutics designed to treat degenerative joint disease (DJD) associated pain, where it serves as the most widely applied objective outcome measure. These analyses have commonly used summary measures, calculating the mean activity per-minute over days and comparing between treatment periods. While this technique has been effective, information about the pattern of activity in cats is lost. In this study, functional data analysis was applied to activity data from client-owned cats with (n = 83) and without (n = 15) DJD. Functional data analysis retains information about the pattern of activity over the 24-hour day, providing insight into activity over time. We hypothesized that 1) cats without DJD would have higher activity counts and intensity of activity than cats with DJD; 2) that activity counts and intensity of activity in cats with DJD would be inversely correlated with total radiographic DJD burden and total orthopedic pain score; and 3) that activity counts and intensity would have a different pattern on weekends versus weekdays. Results and conclusions Results showed marked inter-cat variability in activity. Cats exhibited a bimodal pattern of activity with a sharp peak in the morning and broader peak in the evening. Results further showed that this pattern was different on weekends than weekdays, with the morning peak being shifted to the right (later). Cats with DJD showed different patterns of activity from cats without DJD, though activity and intensity were not always lower; instead both the peaks and troughs of activity were less extreme than those of the cats without DJD. Functional data analysis provides insight into the pattern of activity in cats, and an alternative method for analyzing accelerometry data that incorporates fluctuations in activity across

  6. Evaluating the effectiveness of joint emission control policies on the reduction of ambient VOCs: Implications from observation during the 2014 APEC summit in suburban Beijing

    Science.gov (United States)

    Li, Kun; Li, Junling; Wang, Weigang; Tong, Shengrui; Liggio, John; Ge, Maofa

    2017-09-01

    Ambient volatile organic compounds (VOCs) at a suburban Beijing site were on-line detected using proton transfer reaction-mass spectrometry (PTR-MS) during autumn of 2014, near the location of the Asia-Pacific Economic Cooperation (APEC) summit. During the APEC summit, the Chinese government enacted strict emission control policies. It was found that VOC concentrations only slightly decreased during the first emission control period (EC I), when control policies were performed in Beijing and 5 cities along the Tai-hang Mountains. However, most of the VOCs (10 out of 12 non-biogenic species) significantly decreased (more than 40%) during the second emission control period (EC II), when control policies were carried out in 16 cities including Beijing, Tianjin, 8 cities of Hebei province and 6 cities of Shandong province. Also the ratio of toluene and benzene decreased during EC II, likely because the emission control policies changed the proportions of different anthropogenic sources. Using the positive matrix factorization (PMF) source apportionment method, five factors are analyzed: (1) vehicle + fuel, (2) solvent, (3) biomass burning, (4) secondary, and (5) background + long-lived. Among them, vehicle + fuel, solvent and biomass burning contribute most of the VOCs concentrations (60%-80%) during the polluted periods and are affected most by emission control policies. During EC II, the reductions of vehicle + fuel, solvent, biomass burning and secondary species were all no less than 50%. Overall, when emission control policies were carried out in many North China Plain (NCP) cities (i.e. EC II), the VOC concentrations of suburban Beijing markedly decreased. This indicates the cross-regional joint-control policies have a large influence on reductions of organic gas species. The findings of this study have vital implications for helping formulate effective emission control policies in China and other countries.

  7. Evaluation of the Disease Activity Score in Twenty-Eight Joints-Based Flare Definitions in Rheumatoid Arthritis: Data From a Three-Year Clinical Trial.

    Science.gov (United States)

    Dougados, Maxime; Huizinga, Tom W J; Choy, Ernest H; Bingham, Clifton O; Aassi, Maher; Bernasconi, Corrado

    2015-12-01

    To assess the flare rate using published criteria (Disease Activity Score in 28 joints [DAS28-2] increase between visits of >1.2 or >0.6 if current DAS28 ≥3.2) in patients receiving constant treatment, and to compare published flare criteria to criteria used by study investigators after biologic treatment discontinuation in the ACT-RAY study. Patients with rheumatoid arthritis (n = 553) were randomized to add tocilizumab to ongoing methotrexate, or switch to tocilizumab plus placebo. If DAS28 ≤3.2 occurred at week 24, treatment remained constant until week 52; here we assessed the DAS28-2 flare rate. Between weeks 52 and 104, patients in sustained remission (DAS28 <2.6 at 2 consecutive visits 12 weeks apart) discontinued tocilizumab and were assessed every 4 weeks. Per protocol, flare was defined as a worsening of disease activity that required treatment beyond the permitted therapy based on investigator opinions (investigator flare) and was compared with the DAS28-2 definition. After tocilizumab discontinuation, DAS28-2 was sensitive (88-100%), but not specific (57-65%), for detecting investigator flare. Under constant treatment, DAS28-2 criteria were met in 136 cases per 100 patient-years despite stable disease activity. Sustained flares were infrequent. Other DAS28-based criteria led to similar conclusions. DAS28-based flare occurred more often than investigator-defined flares after biologic agent discontinuation. More stringent criteria may be more appropriate for clinical practice. © 2015, American College of Rheumatology.

  8. The Use of Functional Data Analysis to Evaluate Activity in a Spontaneous Model of Degenerative Joint Disease Associated Pain in Cats.

    Science.gov (United States)

    Gruen, Margaret E; Alfaro-Córdoba, Marcela; Thomson, Andrea E; Worth, Alicia C; Staicu, Ana-Maria; Lascelles, B Duncan X

    2017-01-01

    Accelerometry is used as an objective measure of physical activity in humans and veterinary species. In cats, one important use of accelerometry is in the study of therapeutics designed to treat degenerative joint disease (DJD) associated pain, where it serves as the most widely applied objective outcome measure. These analyses have commonly used summary measures, calculating the mean activity per-minute over days and comparing between treatment periods. While this technique has been effective, information about the pattern of activity in cats is lost. In this study, functional data analysis was applied to activity data from client-owned cats with (n = 83) and without (n = 15) DJD. Functional data analysis retains information about the pattern of activity over the 24-hour day, providing insight into activity over time. We hypothesized that 1) cats without DJD would have higher activity counts and intensity of activity than cats with DJD; 2) that activity counts and intensity of activity in cats with DJD would be inversely correlated with total radiographic DJD burden and total orthopedic pain score; and 3) that activity counts and intensity would have a different pattern on weekends versus weekdays. Results showed marked inter-cat variability in activity. Cats exhibited a bimodal pattern of activity with a sharp peak in the morning and broader peak in the evening. Results further showed that this pattern was different on weekends than weekdays, with the morning peak being shifted to the right (later). Cats with DJD showed different patterns of activity from cats without DJD, though activity and intensity were not always lower; instead both the peaks and troughs of activity were less extreme than those of the cats without DJD. Functional data analysis provides insight into the pattern of activity in cats, and an alternative method for analyzing accelerometry data that incorporates fluctuations in activity across the day.

  9. Distributed usability evaluation

    DEFF Research Database (Denmark)

    Christensen, Lars; Frøkjær, Erik

    2010-01-01

    , providing access to an evaluator (usability expert) and to product developers or managers who want to review the incidents and analyse them. DUE supports evaluation in the development stages from running prototypes and onwards. A case study of the use of DUE in a corporate environment is presented......We present DUE (Distributed Usability Evaluation), a technique for collecting and evaluating usability data. The DUE infrastructure involves a client-server network. A client-based tool resides on the workstation of each user, providing a screen video recording, microphone input of voice commentary....... The study indicates that the DUE technique is effective in terms of low bias, high efficiency, and clear communication of usability issues among users, evaluators and developers. Further, DUE is supporting long-term evaluations making possible empirical studies of learnability....

  10. Dimensions of Creative Evaluation

    DEFF Research Database (Denmark)

    Christensen, Bo; Ball, Linden J.

    2016-01-01

    continue. Each dimension was associated with a specific underpinning ‘logic’ determining how these dimensions were evaluated in practice. Our analysis clarified how these dimensions triggered reasoning strategies such as running mental simulations or making design suggestions, ranging from ‘go....../kill’ decisions to loose recommendations to continue without directional steer. The findings advance our theoretical understanding of evaluation behaviour in design and alert practicing design evaluators to the nature and consequences of their critical appraisals....

  11. ADMS Evaluation Platform

    Energy Technology Data Exchange (ETDEWEB)

    2018-01-23

    Deploying an ADMS or looking to optimize its value? NREL offers a low-cost, low-risk evaluation platform for assessing ADMS performance. The National Renewable Energy Laboratory (NREL) has developed a vendor-neutral advanced distribution management system (ADMS) evaluation platform and is expanding its capabilities. The platform uses actual grid-scale hardware, large-scale distribution system models, and advanced visualization to simulate realworld conditions for the most accurate ADMS evaluation and experimentation.

  12. Evaluation development in Senegal

    Directory of Open Access Journals (Sweden)

    Monica Lomeña-Gelis

    2013-09-01

    Full Text Available Background: This article outlined the diversified history, the current state and future prospects of planning and evaluation in Senegal. Objectives: The aim was to nurture debate on the quest for a more ‘African-rooted evaluation practice’. Method: The article was based on an extensive grey literature review, the author’s involvement in SenEval and personal interviews. The literature on development evaluation and evaluation capacity development helped to frame the overall analysis. Results: Donor policies and practices have heavily influenced evaluation practice in Senegal but recent changes are shifting the emphasis to more context-specific practice. Some encouraging signs are the creation of a high-level commission for evaluation, the impulsion of results-based management in public administrations and the improved monitoring of poverty reduction strategies. Also promising are the individual evaluation capacities of some local actors and more diversified, professionalised training. The last flagship activities promoted by SenEval, a voluntary organisation of professional evaluators, and the prospects of its formalisation, could be a turning point in the development of evaluation in Senegal. Nevertheless, evaluation practice remains today focused more on accountability and controlthan on learning. Moreover, the institutional setup is not coherent and consolidated to ensure a perennial system to manage, conduct and use evaluations, ensuring their quality and inclusion in the policy cycle. Conclusion: We argued that SenEval has a significant role to play in boosting demand, strengthening the policy and institutional framework and promoting exchanges with the African and international evaluation community. 

  13. Evaluation of learning materials

    DEFF Research Database (Denmark)

    Hansen, Thomas Illum; Bundsgaard, Jeppe

    2011-01-01

    Artiklen præsenterer en teoretisk rammesætning af evlauering af læremidler, der både omfatter semiotisk og didaktisk analyse af læremidlets design, analyse og evaluering af kontekstspecifik brug og evaluering af læringsudbytte.......Artiklen præsenterer en teoretisk rammesætning af evlauering af læremidler, der både omfatter semiotisk og didaktisk analyse af læremidlets design, analyse og evaluering af kontekstspecifik brug og evaluering af læringsudbytte....

  14. Malawi - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — This ex post performance evaluation was carried out to provide an independent, objective investigation into the effectiveness and efficacy of MTP activities, using...

  15. Information Retrieval Evaluation

    CERN Document Server

    Harman, Donna

    2011-01-01

    Evaluation has always played a major role in information retrieval, with the early pioneers such as Cyril Cleverdon and Gerard Salton laying the foundations for most of the evaluation methodologies in use today. The retrieval community has been extremely fortunate to have such a well-grounded evaluation paradigm during a period when most of the human language technologies were just developing. This lecture has the goal of explaining where these evaluation methodologies came from and how they have continued to adapt to the vastly changed environment in the search engine world today. The lecture

  16. Tanzania - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The methodologies employed by the evaluation are both quantitative and qualitative. Wherever possible, we obtain data and employ an identification strategy with...

  17. Operational Area Environmental Evaluations

    Energy Technology Data Exchange (ETDEWEB)

    Bailey-White, Brenda Eileen [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Nagy, Michael David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wagner, Katrina Marie [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Goodman, Thomas Richard [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Herring, Allen [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Catechis, Christopher S. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Kinghorn, Aubrianna Nicole [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Johnson, Ellie [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Barthel, Michael David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Casaus, Benito [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-08-01

    The Operational Area Environmental Evaluation update provides a description of activities that have the potential to adversely affect natural and cultural resources, including soil, air, water, biological, ecological, and historical resources. The environmental sensitivity of an area is evaluated and summarized, which may facilitate informed management decisions as to where development may be prohibited, restricted, or subject to additional requirements.

  18. ESBL Evaluation framework

    NARCIS (Netherlands)

    Bondt, N.; Asseldonk, van M.A.P.M.; Bergevoet, R.H.M.

    2016-01-01

    Extended-spectrum bèta-lactamases (ESBL)-producing bacteria have become increasingly common in animals and humans. The goal of the presented ESBL evaluation framework is to help policy makers to evaluate the effectiveness of possible interventions aimed to reduce ESBL levels in livestock. An

  19. Using Economic Methods Evaluatively

    Science.gov (United States)

    King, Julian

    2017-01-01

    As evaluators, we are often asked to determine whether policies and programs provide value for the resources invested. Addressing that question can be a quandary, and, in some cases, evaluators question whether cost-benefit analysis is fit for this purpose. With increased interest globally in social enterprise, impact investing, and social impact…

  20. Evaluating Animal Health Investments

    NARCIS (Netherlands)

    Rushton, J.; Raboisson, D.; Velthuis, A.G.J.; Bergevoet, R.H.M.

    2012-01-01

    Economic evaluation of livestock diseases can either estimate their impact in terms of disease losses and treatment costs or it can examine the value of investments in coordinated disease control or eradication programmes. The latter evaluations can be ex ante and ex post and are useful in

  1. Policy evaluation in Europe

    NARCIS (Netherlands)

    Pattyn, V.; Voorst, S. van; Mastenbroek, E.; Dunlop, C.; Thiel, S. van; Ongaro, E.

    2018-01-01

    Policy evaluations are increasingly considered a taken-for-granted prerequisite for a well-performing public sector. In this chapter, we address the question whether this view reflects the actual situation concerning evaluation capacity and culture in Europe. First, we reflect on the history of

  2. Evaluating professional development

    CERN Document Server

    Guskey, Thomas R

    2000-01-01

    This is a practical guide to evaluating professional development programs at five increasing levels of sophistication: participants' reaction to professional development; how much participants learned; evaluating organizational support and change; how participants use their new knowledge and skills; and improvements in student learning.

  3. Evaluation in Choreographic Pedagogy

    Science.gov (United States)

    Hamalainen, Soili

    2002-01-01

    The most familiar form of evaluation in Western theatrical dance is aesthetic judgement, which considers dance performances as objects of art. This is how dance critics usually approach dance. However, there is more to evaluation than this. It also plays an integral part in learning: it can help a student develop skills in choreography as well as…

  4. Reevaluating Teaching Evaluations

    Science.gov (United States)

    D'Agostino, Susan; Kosegarten, Jay

    2015-01-01

    In this article, the authors propose the use of new terminology when discussing teaching evaluations. Surveys can be considered as providing students an opportunity for "feedback" about teachers, not "evaluations" of teachers. Students, professors, and administrators should not view the surveys as an opportunity to judge a…

  5. Evaluating Web Usability

    Science.gov (United States)

    Snider, Jean; Martin, Florence

    2012-01-01

    Web usability focuses on design elements and processes that make web pages easy to use. A website for college students was evaluated for underutilization. One-on-one testing, focus groups, web analytics, peer university review and marketing focus group and demographic data were utilized to conduct usability evaluation. The results indicated that…

  6. Evaluation of learning materials

    DEFF Research Database (Denmark)

    Hansen, Thomas Illum; Bundsgaard, Jeppe

    2011-01-01

    Artiklen præsenterer en teoretisk rammesætning af evlauering af læremidler, der både omfatter semiotisk og didaktisk analyse af læremidlets design, analyse og evaluering af kontekstspecifik brug og evaluering af læringsudbytte....

  7. Evaluation of learning materials

    DEFF Research Database (Denmark)

    Bundsgaard, Jeppe; Hansen, Thomas Illum

    2011-01-01

    This paper presents a holistic framework for evaluating learning materials and designs for learning. A holistic evaluation comprises investigations of the potential learning potential, the actualized learning potential, and the actual learning. Each aspect is explained and exemplified through...... theoretical models and definitions....

  8. Building an evaluation infrastructure

    DEFF Research Database (Denmark)

    Brandrup, Morten; Østergaard, Kija Lin

    an evaluation infrastructure which enables clinicians to collaboratively evaluate IT system usage and related work practices. Access to the collected feedback is given through a central online repository presenting the feedback and analysed collaboratively. We describe this through a case where nurses...

  9. Horus Web Site Evaluation

    OpenAIRE

    Atef Qattan Ben Mohamed Qattan

    2005-01-01

    An Evaluative study for the children web site Horus, it begins with general description for the web site and its components, then it evaluates it according to 6 criteria ; Authority, Coverage, Contents, Accuracy, Design, and pictures and Multimedia. Finally it summarizes its results.

  10. Evaluation and Learning Policy

    International Development Research Centre (IDRC) Digital Library (Canada)

    Amy Etherington

    Strategic Plan. This complements monitoring and internal assessment of progress against indicators for the Centre's strategic objectives. • Targeted impact evaluations provide evidence of the contribution of IDRC-supported research to longer-term effects on peoples' lives or the environment. These evaluations are targeted ...

  11. Evaluating Library Public Service.

    Science.gov (United States)

    Murphy, Marcy

    1990-01-01

    Reviews the use of library system efficiency and effectiveness as the accepted method for measuring and evaluating library services, and examines alternative evaluation methods. Other significant influences on library performance are discussed, including professional ethics, concepts of leadership, organizational design, and definitions of…

  12. Evaluating Distributed Timing Constraints

    DEFF Research Database (Denmark)

    Kristensen, C.H.; Drejer, N.

    1994-01-01

    In this paper we describe a solution to the problem of implementing time-optimal evaluation of timing constraints in distributed real-time systems.......In this paper we describe a solution to the problem of implementing time-optimal evaluation of timing constraints in distributed real-time systems....

  13. Software product family evaluation

    NARCIS (Netherlands)

    van der Linden, F; Bosch, J; Kamsties, E; Kansala, K; Krzanik, L; Obbink, H; VanDerLinden, F

    2004-01-01

    This paper proposes a 4-dimensional software product family engineering evaluation model. The 4 dimensions relate to the software engineering concerns of business, architecture, organisation and process. The evaluation model is meant to be used within organisations to determine the status of their

  14. Evaluation in Context

    DEFF Research Database (Denmark)

    Jaap, Kamps; Lalmas, Mounia; Larsen, Birger

    All search happens in a particular context - such as the particular collection of a digital library, its associated search tasks, and its associated users. Information retrieval researchers usually agree on the importance of context, but they rarely address the issue. In particular, evaluation....../assessors - by designing targeted questionnaires. The questionnaire data becomes part of the evaluation test-suite as valuable data on the context of the search requests.We have experimented with this questionnaire approach during the evaluation campaign of the INitiative for the Evaluation of XML Retrieval (INEX......). The results of this case study demonstrate the viability of the questionnaire approach as a means to capture context in evaluation. This can help explain and control some of the user or topic variation in the test collection. Moreover, it allows to break down the set of topics in various meaningful categories...

  15. Validity in Qualitative Evaluation

    Directory of Open Access Journals (Sweden)

    Vasco Lub

    2015-12-01

    Full Text Available This article provides a discussion on the question of validity in qualitative evaluation. Although validity in qualitative inquiry has been widely reflected upon in the methodological literature (and is still often subject of debate, the link with evaluation research is underexplored. Elaborating on epistemological and theoretical conceptualizations by Guba and Lincoln and Creswell and Miller, the article explores aspects of validity of qualitative research with the explicit objective of connecting them with aspects of evaluation in social policy. It argues that different purposes of qualitative evaluations can be linked with different scientific paradigms and perspectives, thus transcending unproductive paradigmatic divisions as well as providing a flexible yet rigorous validity framework for researchers and reviewers of qualitative evaluations.

  16. Health economic evaluation in Greece.

    Science.gov (United States)

    Rovithis, Dimitrios

    2006-01-01

    There is a growing volume of literature on health economic evaluation, with this form of analysis becoming increasingly influential at the decision-making level worldwide. The purpose of this study was to review the current state of health economic evaluation in Greece, with a view to uncovering reasons why its use in this country is limited. A search of the NHS Economic Evaluation Database was undertaken. The search included cost, cost-of-illness, cost-minimization, cost-effectiveness, cost-consequences, cost-utility, and cost-benefit analyses and was narrowed only to Greek authors undertaking solo or joint health economic evaluation in Greece. The search revealed that, in Greece, very little health economic evaluation has been undertaken. The main reason for the lack of interest is that the current chaotic healthcare system structure and financing does not provide the appropriate incentives to stimulate a powerful interest in this type of research. This condition is a result of the lack of a long-term national health policy and the hesitation of the present and past Greek governments to date to proceed to large-scale reforms because of political considerations. The Greek governments have also been content with the good health indicators being achieved. Even if it is accepted that good health prevails in Greece, slower economic growth rates, an ageing population, and the continuous immigration will place increasing pressure on healthcare resources and will necessitate a more rational use of these resources. Health economic evaluation, by weighing benefits against costs, therefore, has an important role to play.

  17. Personality influences quality-of-life assessments in adult patients after allogeneic hematopoietic SCT: results from a joint evaluation of the prospective German Multicenter Validation Trial and the Fred Hutchinson Cancer Research Center.

    Science.gov (United States)

    Herzberg, P Y; Lee, S J; Heussner, P; Mumm, F H A; Hilgendorf, I; von Harsdorf, S; Hemmati, P; Rieger, K; Greinix, H T; Freund, M; Holler, E; Wolff, D

    2013-01-01

    The influence of personality on health related quality of life (QoL) and physical functioning in the setting of allogeneic hematopoietic SCT (alloHSCT) is unknown. We conducted a joint evaluation within two independent cohorts of alloHSCT recipients to investigate the impact of personality on reported QoL and physical functioning. Two-hundred-eight patients (median age 44 years, range 18-72) of cohort 1 and 93 patients (median age 55 years, range 19-79) of cohort 2 after alloHSCT were evaluated. Personality was assessed using the 24-adjective measure (AM), which measures the Big-Five personality domains and the Life Orientation Test-Revised (LOT-R), measuring optimism and pessimism. QoL was measured using the Functional Assessment of Cancer Therapy with bone marrow transplantation subscale (FACT-BMT), Short Form 36 (SF-36), the human activity profile (HAP), as well as the NIH criteria-based cGVHD activity assessment form and the Lee cGVHD symptom scale. Neuroticism was significantly associated with worse function measured by the HAP and FACT-BMT. Optimism significantly improved QoL captured by the FACT-BMT. Pessimism significantly impaired physical function captured by the HAP and SF-36. Extraversion was significantly associated with reduced depression and lower severity of cGVHD symptoms reported by the patient and the physician. The results suggest that personality traits and pre-treatment QoL assessments should be measured in clinical trials to facilitate the interpretation of QoL data.

  18. Evaluatie Constructie Joint Support Ship (Evaluation Structure Joint Support Ship)

    Science.gov (United States)

    2008-03-15

    3.2.9 Sectie 112, stores frame 232-fore Er is verondersteld dat onder deze post de romp boven F-dek wordt bedoeld gelet op de figging van het...foul k1einer omdat bet stil water buigend moment aanzienlijk groter is. Zoals reeds aangegeven kan het verloop van bet buigend moment in bet model noc...webframehoogte ................ ....... ........... ..-....... 99) Figuur 24 Ring frames plaatdikte

  19. An Evaluation of a Clerkship In Cardiology

    Science.gov (United States)

    Edson, John N.; and others

    1969-01-01

    Evaluation of the clinical clerkship in Cardiology for general practitioners proves there is an urgent need for continuing post graduate medical education for general practitioners. Clerkship was offered jointly by the Long Island College Hospital and the State University of New York Downstate Medical Center, Brooklyn, New York. (IR)

  20. Advanced technology wind shear prediction system evaluation

    Science.gov (United States)

    Gering, Greg

    1992-01-01

    The program overviews: (1) American Airline (AA)/Turbulence Prediction Systems (TPS), which have installed forward looking infrared predictive windshear system on 3 MD-80 aircraft; (2) AA/TPS AWAS III evaluation, which is a joint effort and is installed in the noise landing gear (NLG) area and a data recorder installed in the E/E compartment.

  1. Covariance evaluation system

    Energy Technology Data Exchange (ETDEWEB)

    Kawano, Toshihiko [Kyushu Univ., Fukuoka (Japan); Shibata, Keiichi

    1997-09-01

    A covariance evaluation system for the evaluated nuclear data library was established. The parameter estimation method and the least squares method with a spline function are used to generate the covariance data. Uncertainties of nuclear reaction model parameters are estimated from experimental data uncertainties, then the covariance of the evaluated cross sections is calculated by means of error propagation. Computer programs ELIESE-3, EGNASH4, ECIS, and CASTHY are used. Covariances of {sup 238}U reaction cross sections were calculated with this system. (author)

  2. Introducing Program Evaluation Models

    Directory of Open Access Journals (Sweden)

    Raluca GÂRBOAN

    2008-02-01

    Full Text Available Programs and project evaluation models can be extremely useful in project planning and management. The aim is to set the right questions as soon as possible in order to see in time and deal with the unwanted program effects, as well as to encourage the positive elements of the project impact. In short, different evaluation models are used in order to minimize losses and maximize the benefits of the interventions upon small or large social groups. This article introduces some of the most recently used evaluation models.

  3. Web site Evaluation Criteria

    Directory of Open Access Journals (Sweden)

    Mojdgan binesh

    2008-07-01

    Full Text Available The ever-increasing evolution of the Internet and the growing number of the resources accessible through this medium, has turned the issue of resource evaluation of the internet-based information into a controversial and cogent issue. By nature, the internet milieu is uncontrollable. It concomitantly contains both verifiable and unverifiable information. Thus it behooves the internet users to develop resource evaluation and critical thinking skills in order to discern appropriate quality resources. Through review and comparison of the available checklists, the present paper endeavors to offer criteria for website evaluation

  4. SHDAS Production Seismometer Evaluation.

    Energy Technology Data Exchange (ETDEWEB)

    Slad, George William [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Merchant, Bion J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-11-01

    The Seismo - Hydroacoustic Data Acquisition System (SHDAS) is undergoing evaluation in preparation for its engineering, development, and deployment by the U.S Navy as an ocean bottom seismic monitoring system. At the current stage of development, the production seismometers are being evaluated to confirm their performance prior to packaging and assembly for deployment. The testing of the seismometers is being conducted at the Pinon Flats Observatory (PFO) , supervised by Sandia National Laboratories, U.S Navy, and RP Kromer Consulting. SNL will conduct evaluation of the collected seismometer data and comment on the performance of the seismometers.

  5. The Case for a Joint Evaluation

    Science.gov (United States)

    2017-01-01

    rankings.19 In either case, the commen- tary allows ratees the opportunity to describe and validate their performance in advantageous or disadvantageous...evalua- tion systems.27 Besides, DOD began phasing in its new civilian employee performance and appraisal program around the rollout of FotF. New... performance during training drills and real-world scenarios, Pacific Ocean, November 2016 (U.S. Navy/Siobhana R. McEwen) 114 Features / The Case for a

  6. Brand Equity Evaluation Model

    National Research Council Canada - National Science Library

    Migle Eleonora cernikovaite

    2011-01-01

    ...) benefits to the consumer. This article aims to assess how the international dimension is reflected in the various models of brand equity, analyze Lithuanian actualities in managing and evaluating brands, also to reveal...

  7. Rapid Evaluation Capability (REC)

    Data.gov (United States)

    Federal Laboratory Consortium — The REC, located at Camp Grayling, MI, uses the only high-explosive impact area in the state to conduct year-round experiments and evaluations. In coordination with...

  8. Defamation for Educator Evaluation.

    Science.gov (United States)

    Zirkel, Perry A.; Gluckman, Ivan B.

    1985-01-01

    The role of privilege in defamation suits arising from the evaluation of public educators is explored in light of the "Manguso vs. Oceanside Unified School District" court case, in which a teacher brought a libel charge against a superintendent. (DCS)

  9. Applied evaluative informetrics

    CERN Document Server

    Moed, Henk F

    2017-01-01

    This book focuses on applied evaluative informetric artifacts or topics. It explains the base notions and assumptions of evaluative informetrics by discussing a series of important applications. The structure of the book is therefore not organized by methodological characteristics, but is centered around popular, often discussed or used informetric artifacts - indicators, methodologies, products, databases - or so called hot topics in which informetric indicators play an important role. Most of the artifacts and topics emerged during the past decade. The principal aim of the book is to present a state of the art in applied evaluative informetrics, and to inform the readers about the pros and cons, potentialities and limitations of the use of informetric/bibliometric indicators in research assessment. The book is a continuation of the book Citation Analysis in Research Evaluation (Springer, 2005). It is of interest to non-specialists, especially research students at advanced master level and higher, all thos...

  10. Materiel Evaluation Facility

    Data.gov (United States)

    Federal Laboratory Consortium — CRREL's Materiel Evaluation Facility (MEF) is a large cold-room facility that can be set up at temperatures ranging from −20°F to 120°F with a temperature change...

  11. Evaluation of maintenance strategies.

    Science.gov (United States)

    2013-11-01

    In the mid1990s, the Arizona Department of Transportation (ADOT) initiated the Maintenance Cost : Effectiveness study (SPR 371) with the development of plans and an experiment design to evaluate the : effectiveness of a variety of asphalt pavement...

  12. BUILDING 341 Seismic Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Halle, J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-06-15

    The Seismic Evaluation of Building 341 located at Lawrence Livermore National Laboratory in Livermore, California has been completed. The subject building consists of a main building, Increment 1, and two smaller additions; Increments 2 and 3.

  13. Evaluation development in Senegal

    Directory of Open Access Journals (Sweden)

    Monica Lomeña-Gelis

    2013-09-01

    Conclusion: We argued that SenEval has a significant role to play in boosting demand, strengthening the policy and institutional framework and promoting exchanges with the African and international evaluation community.

  14. Occupational therapy evaluation

    DEFF Research Database (Denmark)

    Nielsen, Kristina Tomra; Wæhrens, Eva Ejlersen

    2015-01-01

    Background: The Occupational Therapy Intervention Process Model (OTIPM) serves to guide occupational therapists in their professional reasoning. The OTIPM prescribes evaluation of task performance based on both self-report and observation. Although this approach seems ideal, many clinicians raise...

  15. Evaluation of rumble stripes.

    Science.gov (United States)

    2010-01-01

    The objective of this study were to: a) monitor the initial installations of rumble stripes and b) evaluate the results of rumble stripe installations. : Ten rural, two-lane road locations were selected by the Kentucky Transportation Cabinet across t...

  16. TrafficTurk evaluation.

    Science.gov (United States)

    2014-04-01

    This report summarizes a project undertaken by the University of Illinois on behalf of the Illinois Department of : Transportation to evaluate a smartphone application called TrafficTurk for traffic safety and traffic monitoring : applications. Traff...

  17. Transport Project Evaluation

    DEFF Research Database (Denmark)

    Leleur, Steen

    1996-01-01

    Two main project evaluation approaches exist: cost-benefit analysis (CBA) and multi-criteria analysis (MCA). Related to a European road evaluation method (EURET 1.1) and the MCA-method, WARP, the paper proposes a set of so-called segregated investment return rates (SIRR) to integrate advantages...... of CBA with those of MCA. The SIRR methodology is demonstrated by use of so-called rank variation graphs provided by the WARP decision support PC-programme. In conclusion the SIRR methodology is seen as promising as it can integrate the most valuable attributes of CBA and MCA in quantitative evaluation...... methodology and at the same time in factual decision-making can help organizing complex evaluation information in an intuitively understandable way to decision-makers....

  18. Evaluating shoulder instability treatment

    NARCIS (Netherlands)

    van der Linde, J.A.

    2016-01-01

    Shoulder instability common occurs. When treated nonoperatively, the resulting societal costs based on health care utilization and productivity losses are significant. Shoulder function can be evaluated using patient reported outcome measurements (PROMs). For shoulder instability, these include the

  19. Evaluation à la carte

    DEFF Research Database (Denmark)

    Bahr, Patrick

    2011-01-01

    We describe how to perform monadic computations over recursive datastructures with fine grained control over the evaluationstrategy. This solves the issue that the definition of a recursivemonadic function already determines the evaluation strategy due tothe necessary sequencing of the monadic...

  20. Early Head Start Evaluation

    Data.gov (United States)

    U.S. Department of Health & Human Services — Longitudinal information from an evaluation where children were randomly assigned to Early Head Start or community services as usual;direct assessments and...

  1. Social media evaluation metrics

    OpenAIRE

    Ronalds Skulme; Valerijs Praude

    2015-01-01

    Background. There are many methods how specialists can evaluate return of online marketing activities. Most of the methods out there are designed for versatile use. But each online marketing tool has its own unique specific metrics that should be taken into account when measuring the return of marketing activities. Authors believe that the methods that are designed to evaluate online marketing activities should also be more specific. Hence authors believe that more specific online marketing r...

  2. Descriptive sensory evaluations

    DEFF Research Database (Denmark)

    Dehlholm, Christian

    . The new methods were compared to the Flash Profile, Napping and conventional descriptive profiling. Furthermore, an approach for applying confidence ellipses to Multiple Factor Analysis (MFA) results from the statistical package R were suggested for the graphical validation and comparisons. PN allowed...... descriptive methodology is proposed and, based on the findings and evaluations of the studies, a concept scale that combines holistic and analytic assessor responses is proposed for future evaluations....

  3. Compost Compaction Evaluation.

    Science.gov (United States)

    1993-10-01

    aerated static pile composting ) has been shown to be most effective at reducing the explosives levels in the soils (4). As a result, it is anticipated...y ■,... tiiii silsis H-ifjfe Compost Compaction Evaluation Report No. ENAEC-TS-CR-93110 Contract No. DACA31-9-D-0079 Task Order No. 01...Leave blank) 2. REPORT DATE October 1993 3. REPORT TYPE AND DATES COVERED Final Report 4. TITLE AND SUBTITLE Compost Compaction Evaluation 6

  4. Evaluating Living Standard Indicators

    OpenAIRE

    Birčiaková Naďa; Stávková Jana; Antošová Veronika

    2015-01-01

    This paper deals with the evaluation of selected available indicators of living standards, divided into three groups, namely economic, environmental, and social. We have selected six countries of the European Union for analysis: Bulgaria, the Czech Republic, Hungary, Luxembourg, France, and Great Britain. The aim of this paper is to evaluate indicators measuring living standards and suggest the most important factors which should be included in the final measurement. We have tried to determin...

  5. Is diagrammatic goniometry feasible for finger ROM evaluation and self-evaluation?

    Science.gov (United States)

    Macionis, Valdas

    2013-06-01

    While "diagrammatic" evaluation of finger joint angles using two folded paper strips as goniometric arms has been proposed and could be an alternative to standard goniometry and a means for self-evaluation, the measurement differences and reliability are unknown. This study assessed the standard and diagrammatic finger goniometry performed by an experienced examiner on patients in terms of (1) intragoniometer and intergoniometer (ie, intrarater) differences and reliability; (2) interrater differences and reliability relative to patients' diagrammatic self-evaluation; and (3) the interrater differences related to patient's hand dominance. Sixty-one patients without previous training self-evaluated active extension of all joints of the fifth finger of one hand once using two rectangular strips of paper. A practitioner used a goniometer and a diagram to perform parallel evaluations once in 12 patients and three times in 49 patients. The diagrams were scanned and measured. All evaluations and proportions of differences between the paired measurements of 5° or less were combined for analysis. Intrarater intraclass correlation coefficients (ICC) based on the second and third practitioner's trials for the proximal interphalangeal joint were greater than 0.99. Reliability was poor when calculations involved the first measurement of the practitioner (ICCs reliability was poor regardless of the practitioner's trial (ICCs reliability, but patients' performance in extempore diagrammatic self-evaluation is inadequate. Further studies are necessary to explore whether appropriate training of patients can improve consistency of diagrammatic self-evaluation.

  6. Making Evaluation Matter: Writings from South Asia | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2016-04-27

    Apr 27, 2016 ... IDRC is a long-time supporter of South Asia's Community of Evaluators to advance evaluation practices in the region. With representation from Afghanistan, Bangladesh, Nepal, India, Pakistan, and Sri Lanka, the Community of Evaluators first came together in 2008. Since then, it has worked jointly on a ...

  7. Evaluated Nuclear Data

    Energy Technology Data Exchange (ETDEWEB)

    Oblozinsky, P.; Oblozinsky,P.; Herman,M.; Mughabghab,S.F.

    2010-10-01

    This chapter describes the current status of evaluated nuclear data for nuclear technology applications. We start with evaluation procedures for neutron-induced reactions focusing on incident energies from the thermal energy up to 20 MeV, though higher energies are also mentioned. This is followed by examining the status of evaluated neutron data for actinides that play dominant role in most of the applications, followed by coolants/moderators, structural materials and fission products. We then discuss neutron covariance data that characterize uncertainties and correlations. We explain how modern nuclear evaluated data libraries are validated against an extensive set of integral benchmark experiments. Afterwards, we briefly examine other data of importance for nuclear technology, including fission yields, thermal neutron scattering and decay data. A description of three major evaluated nuclear data libraries is provided, including the latest version of the US library ENDF/B-VII.0, European JEFF-3.1 and Japanese JENDL-3.3. A brief introduction is made to current web retrieval systems that allow easy access to a vast amount of up-to-date evaluated nuclear data for nuclear technology applications.

  8. Avaliação do efeito da energia de soldagem sobre as tensões residuais resultantes em juntas soldadas com multipasse Welding energy input evaluation on the final residual stresses in multipass welded joints

    Directory of Open Access Journals (Sweden)

    George Luiz Gomes de Oliveira

    2010-09-01

    Full Text Available A energia de soldagem pode ser ajustada tanto por meio do controle da potência (tensão e corrente de soldagem quanto por meio da velocidade de soldagem. Tais formas de ajustes modificam os efeitos da energia de soldagem sobre a junta, o que pode influenciar de forma distinta as tensões residuais resultantes na mesma. Desta forma, o objetivo deste trabalho é avaliar o efeito da energia de soldagem, considerando seu ajuste através da alteração individual e independente da corrente e da velocidade de soldagem, sobre as tensões residuais resultantes em juntas soldadas com multipasse. Foram empregadas amostras de aço estrutural chanfradas em meio-v e soldadas utilizando eletrodo revestido. Aplicaram-se três energias de soldagem obtidas por meio de três níveis distintos de corrente e de velocidade de soldagem. As amostras foram levadas a um difratômetro de raios-x portátil onde foram levantados os perfis de tensões residuais na superfície das mesmas. Uma verificação importante foi que diferentes parâmetros de soldagem que resultam em aportes térmicos "iguais", geram níveis diferentes de tensões residuais, ou seja, a energia de soldagem não pode ser considerada de forma isolada em análises de níveis de tensões residuais resultantes da soldagem multipasse.The energy input in welding can be adjusted by either control of welding power (voltage and welding current or welding speed. These different ways of changing can result in different residual stress profiles in the welded joint. Then, the aim of this work is to evaluate, in an independent way, the welding energy input, current and speed effect on the final residual stresses of a multipass joint. Semi-v chamfered samples of structural steel and SMAW process was used. Three different levels of welding current and speed was employed in order to get three levels of energy input. The residual stress measurement was accomplished through X-ray diffraction, using a minidiffractometer

  9. Evaluating Educational Software

    Directory of Open Access Journals (Sweden)

    Paula Escudeiro

    2010-04-01

    Full Text Available This paper presents the overall evaluation of the Quantitative Evaluation Framework (QEF approach which has been applied in an operational teaching environment for the last six years. During this period we have evaluated the difference between educational software systems that were developed using the Techno-Didactical Extension for Instruction/Learning Based on Computer (X-TEC model and educational software systems using other models. The X-TEC model is used in the development of educational software in order to strengthen the potential quality of e-Learning systems. We selected the QEF approach for this evaluation to highlight the strengths and limitations of the X-TEC model. We adapted the approach in a way where the essential criteria are assessed in a pre-evaluation phase which will cover the general usage requirements. In this research project we conduct experiments with groups of students and teachers in Multimedia Information Systems classes of Oporto Polytechnic, to examine the influence of training in an instructional system design approach on their attitude to re-use this approach and on their performances in design, using this approach.

  10. [A pediatric neuropsychological evaluation].

    Science.gov (United States)

    Stolarska, Urszula; Kaciński, Marek

    2007-01-01

    Pediatric neuropsychology is currently one of the most expansive fields of psychology, developing between clinical neurology and other neurosciences. This work presents the main possibilities of a pediatric neuropsychological evaluation in known clinical situations and the status of the neuropsychological profession. The necessity of evaluating the level of cognitive functioning in children from high risk groups, children with somatic, behavioural, emotional or developmental disorders was reminded. Clinical examples are described, when a neuropsychological evaluation of the child reveals important information, becoming a valuable part of the medical diagnosing process. Diagnostic methods most commonly used for assessing the level of cognitive functioning are presented, baring in mind its division into specific cognitive domains: executive functions, learning and memory, attention, visuo-motor and verbal skills. Most popular of the international and domestic IQ tests are described, including suggestions about testing children with various degrees of intellectual disability. Among the methods are tests for assessing children in age groups from 0-18. The authors described a neuropsychological interpretation of the evaluation results, including tests, behavioural observation, interviews and other diagnostic methods. Some limitations of the neuropsychological assessment methods are also mentioned, such as questionable ecological validity. the knowledge of possibilities and the necessity of the neuropsychological evaluation in children should become much more common, especially in the medical environment. The status of the neuropsychologist in Poland need a precise legal regulation.

  11. The Preparticipation Sports Evaluation.

    Science.gov (United States)

    Mirabelli, Mark H; Devine, Mathew J; Singh, Jaskaran; Mendoza, Michael

    2015-09-01

    The preparticipation physical evaluation is a commonly requested medical visit for amateur and professional athletes of all ages. The overarching goal is to maximize the health of athletes and their safe participation in sports. Although studies have not found that the preparticipation physical evaluation prevents morbidity and mortality associated with sports, it may detect conditions that predispose the athlete to injury or illness and can provide strategies to prevent injuries. Clearance depends on the outcome of the evaluation and the type of sport (and sometimes position or event) in which the athlete participates. All persons undergoing a preparticipation physical evaluation should be questioned about exertional symptoms, presence of a heart murmur, symptoms of Marfan syndrome, and family history of premature serious cardiac conditions or sudden death. The physical examination should focus on the cardiovascular and musculoskeletal systems. U.S. medical and athletic organizations discourage screening electrocardiography and blood and urine testing in asymptomatic patients. Further evaluation should be considered for persons with heart or lung disease, bleeding disorders, musculoskeletal problems, history of concussion, or other neurologic disorders.

  12. STRUCTURED CLINICAL EVALUATION

    Directory of Open Access Journals (Sweden)

    Arabela Maria Barbosa Sampaio

    2014-05-01

    Full Text Available In a world experiencing profound technological and socio-political changes in areas of knowledge and capacity, healthcare can not remain static. A new kind of professional is required, whose practice is based on ethics, scientific standards, integrity, citizenship, and health promotion, who develops skills beyond healthcare, such as decision making, communication,leadership, management, and continuing education. No single method can assess all of these elements (knowledge, skills, and attitudes, and only a combination of methods is able to produce a valid evaluation. An alternative method exists: structured clinical assessments based on observation of "to do, or how to do" that aim to complete this evaluation by focusing attention on the performance of specific skills. In order to broaden the scope of evaluation methods that have been used in health education, this article, a literature review, intends to offer readers an overview of the diverse types of structured clinical evaluation, emphasizing Objective Structured Clinical Examination, the most widely used in Brazil, with a goal of advancing opportunities for health professionals to make use of this evaluative tool.

  13. Evaluación de la adherencia de uniones adhesivas metálicas con adhesivos epoxídicos modificados Evaluation of the adherence of bonded metallic joints with modified epoxy adhesives

    Directory of Open Access Journals (Sweden)

    Filiberto González Garcia

    2008-03-01

    agents. The adhesive properties were investigated using the epoxy resins as independent systems as well as the modified resin. The adhesive properties of modified and unmodified epoxy resins were studied using steel alloy (ASTM A36 as adherent. The adherence has been evaluated using three geometric assays of steel-steel bonded joints. The rheological behavior of the adhesives was investigated under isothermal conditions. The rheological parameters associated with the curing reaction such as reaction rate, pot life and gel time of the pure adhesives were related to the chemical structure of the curing agents. The cloud point and the gel time of the modified adhesives were related to the morphology and the reaction rate, respectively. The morphology was characterized by scanning electronic microscopy. The adherence of the adhesive joints at different mechanical solicitations was related to the generated morphology by the dispersed phase of each modifier and the networks structures of the epoxy adhesives.

  14. Evaluation of HVOF coatings

    Directory of Open Access Journals (Sweden)

    Mariana Landová

    2016-07-01

    Full Text Available Attention in this paper is devoted to the evaluation of wear coatings deposited using HVOF technology (high velocity oxy-fuel. There were evaluated three types of coatings based on WC-Co (next only 1343, WC-Co-Cr (next only 1350 and Cr3C2-25NiCr (next only 1375. There was assessed adherence of coatings, micro hardness, porosity and the tribological properties of erosive, abrasive, adhesive and wear resistance of coatings in terms of cyclic thermal load. Thanks to wide variety of suitable materials and their combinations, the area of utilization thermally sprayed coatings is very broad. It is possible to deposit coatings of various materials from pure metals to special alloys. The best results in the evaluated properties were achieved at the coating with the label 1375.

  15. Airframe noise prediction evaluation

    Science.gov (United States)

    Yamamoto, Kingo J.; Donelson, Michael J.; Huang, Shumei C.; Joshi, Mahendra C.

    1995-01-01

    The objective of this study is to evaluate the accuracy and adequacy of current airframe noise prediction methods using available airframe noise measurements from tests of a narrow body transport (DC-9) and a wide body transport (DC-10) in addition to scale model test data. General features of the airframe noise from these aircraft and models are outlined. The results of the assessment of two airframe prediction methods, Fink's and Munson's methods, against flight test data of these aircraft and scale model wind tunnel test data are presented. These methods were extensively evaluated against measured data from several configurations including clean, slat deployed, landing gear-deployed, flap deployed, and landing configurations of both DC-9 and DC-10. They were also assessed against a limited number of configurations of scale models. The evaluation was conducted in terms of overall sound pressure level (OASPL), tone corrected perceived noise level (PNLT), and one-third-octave band sound pressure level (SPL).

  16. Bridging the Evaluation Gap

    Directory of Open Access Journals (Sweden)

    Paul Wouters

    2017-02-01

    Full Text Available Paul Wouters’ essay is concerned with bridging the gap between what we value in our academic work and how we are assessed in formal evaluation exercises. He reflects on the recent evaluation of his own center, and reminds us that it is productive to see evaluations not as the (obviously impossible attempt to produce a true representation of past work, but rather as the exploration and performance of “who one wants to be.” Reflecting on why STS should do more than just play along to survive in the indicator game, he suggests that our field should contribute to changing its very rules. In this endeavor, the attitude and sensibilities developed in our field may be more important than any specific theoretical concepts or methodologies.

  17. Evaluating six soft approaches

    Directory of Open Access Journals (Sweden)

    Lene Sørensen

    2008-09-01

    Full Text Available The paper introduces and evaluates six soft approaches used in strategy development and planning. We take a planner’s perspective on discussing the concepts of strategy development and planning. This means that we see strategy development and planning as learning processes based on Ackoff’s interactive planning principles to be supported by soft approaches in carrying out the principles in action. These six soft approaches are suitable for supporting various steps of the strategy development and planning process. These are the SWOT analysis, the Future Workshop, the Scenario methodology, Strategic Option Development and Analysis, Strategic Choice Approach and Soft Systems Methodology. Evaluations of each methodology are carried out using a conceptual framework in which the organisation, the result, the process and the technology of the specific approach are taken into consideration. Using such a conceptual framework for evaluations of soft approaches increases the understanding of them, their transparency, and their usability in practice.

  18. End User Evaluations

    Science.gov (United States)

    Jay, Caroline; Lunn, Darren; Michailidou, Eleni

    As new technologies emerge, and Web sites become increasingly sophisticated, ensuring they remain accessible to disabled and small-screen users is a major challenge. While guidelines and automated evaluation tools are useful for informing some aspects of Web site design, numerous studies have demonstrated that they provide no guarantee that the site is genuinely accessible. The only reliable way to evaluate the accessibility of a site is to study the intended users interacting with it. This chapter outlines the processes that can be used throughout the design life cycle to ensure Web accessibility, describing their strengths and weaknesses, and discussing the practical and ethical considerations that they entail. The chapter also considers an important emerging trend in user evaluations: combining data from studies of “standard” Web use with data describing existing accessibility issues, to drive accessibility solutions forward.

  19. Ergonomic Evaluation of Biomechanical Hand Function

    Directory of Open Access Journals (Sweden)

    Kyung-Sun Lee

    2015-03-01

    Full Text Available The human hand is a complex structure that performs various functions for activities of daily living and occupations. This paper presents a literature review on the methodologies used to evaluate hand functions from a biomechanics standpoint, including anthropometry, kinematics, kinetics, and electromyography (EMG. Anthropometry describes the dimensions and measurements of the hand. Kinematics includes hand movements and the range of motion of finger joints. Kinetics includes hand models for tendon and joint force analysis. EMG is used on hand muscles associated with hand functions and with signal-processing technology.

  20. Thyroid disorders in patients with newly diagnosed rheumatoid arthritis is associated with poor initial treatment response evaluated by disease activity score in 28 joints-C-reactive protein (DAS28-CRP): An observational cohort study.

    Science.gov (United States)

    Emamifar, Amir; Hangaard, Jørgen; Jensen Hansen, Inger Marie

    2017-10-01

    To determine the prevalence of thyroid disorders among newly diagnosed rheumatoid arthritis (RA) patients and evaluate the association between clinical characteristics of RA and thyroid disorders, and also initial treatment response in the RA patients with thyroid disorders.Newly diagnosed, adult RA patients who were diagnosed according to the new 2010 American College of Rheumatology/European League Against Rheumatism criteria since January 1, 2010, were included. Patients' demographic data, serology results including immunoglobulin M rheumatoid factor (IgM RF), anticyclic citrullinated peptide antibody (anti-CCP), and antinuclear antibody (ANA), and also disease activity score in 28 joints-C-reactive protein at the time of diagnosis and after 4 months (±1-2 months) of treatment initiation were extracted from Danish Danbio Registry. Patients' electronic hospital records for the past 10 years were reviewed to reveal if they had been diagnosed with thyroid disorders or they had abnormal thyroid test.In all, 439 patients were included, female 60.1%, mean age 64.6 ± 15.0 years and disease duration 2.6 ± 1.7 years. Prevalence of thyroid disorders was 69/439 (15.7%) and hypothyroidism was the most frequent disorder (30.4%). The presence of thyroid disorders among RA patients was significantly associated with female sex (P disorders had significantly poorer initial response to RA treatment compared with patients with isolated RA after 4 months of treatment (P = .02). There were no associations between thyroid disorders and age, disease duration, and also IgM RF positivity.Presence of thyroid disorders in RA patients is suggestive of a more aggressive disease and poor outcome, with direct effect on initial treatment response. To diagnose concurrent thyroid disorders at an earlier stage, routine measurement of serum thyroid-stimulating hormone is recommended in all RA patients at the time of diagnosis and with yearly interval thereafter.

  1. A importância da avaliação postural no paciente com disfunção da articulação temporomandibular The importance of the postural evaluation in patients with temporomandibular joint dysfunction

    Directory of Open Access Journals (Sweden)

    Daniela Vieira Amantéa

    2004-09-01

    Full Text Available O equilíbrio do corpo bem como os movimentos da cabeça são originados pelo posicionamento do crânio sobre a região cervical determinando assim a postura do indivíduo. Estando a articulação temporomandibular (ATM diretamente relacionada com a região cervical e escapular através de um sistema neuromuscular comum, alterações posturais da coluna cervical podem acarretar em distúrbios na ATM e vice-versa. O número crescente de pacientes com disfunção da articulação temporomandibular (DTM que apresentavam alterações posturais levou ao desenvolvimento de estudos que procuram demonstrar suas relações. Este trabalho propôs-se realizar uma revisão de literatura que demonstre a relação entre má postura e DTM. Salienta ainda a necessidade de uma equipe multidisciplinar, formada pelo médico ortopedista, o cirurgião dentista e o fisioterapeuta, para realizarem juntos o diagnóstico e o tratamento de tais alterações.The position of the head over the neck determines the posture of the body and is responsible for the body balance and head movements. The temporomandibular joint (TMA is directly related to the cervical and the scapular region by a common neuromuscular system. Changes in the cervical spine can cause lead to TMA disorders and contra wise. The increasing number of patients with TMA disorders who also had postural disorders led to the development of studies to evaluate their interactions. The present study aimed to review the papers that have shown a relationship between wrong posture and TMA disorders. It emphasizes the importance of a multidisciplinary team formed by an orthopedist, dental surgeon, and physiotherapist in the diagnosis and treatment of TMA disorders and wrong posture.

  2. Evaluation of IP Portfolios

    DEFF Research Database (Denmark)

    Søberg, Peder Veng

    2009-01-01

    As a result of an inquiry concerning how to evaluate IP (intellectual property) portfolios in order to enable the best possible use of IP resources within organizations, an IP evaluation approach primarily applicable for patents and utility models is developed. The developed approach is useful...... in order to discuss, visualize and align IPR issues with different management functions within the organization. Unlike existing approaches the present approach takes into account such value indicators as remaining lifetime, geographical range, broadness of scope and product strategic considerations...

  3. SHDAS Production Digitizer Evaluation.

    Energy Technology Data Exchange (ETDEWEB)

    Merchant, Bion J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-07-01

    The Seismo-Hydroacoustic Data Acquisition System (SHDAS) is undergoing evaluation in preparation for its engineering, development, and deployment by the U.S Navy as an ocean bottom seismic monitoring system. At the current stage of development, the production digitizers are being evaluated to confirm their performance prior to packaging and assembly for deployment. The testing of the digitizers is being conducted at Delta Group Electronics, the digitizer fabricator, in San Diego, California, performed by Sandia National Laboratories with the assistance of Leidos and Delta Group Electronics.

  4. Semantic Web Evaluation Challenge

    CERN Document Server

    2014-01-01

    This book constitutes the thoroughly refereed post conference proceedings of the first edition of the Semantic Web Evaluation Challenge, SemWebEval 2014, co-located with the 11th Extended Semantic Web conference, held in Anissaras, Crete, Greece, in May 2014. This book includes the descriptions of all methods and tools that competed at SemWebEval 2014, together with a detailed description of the tasks, evaluation procedures and datasets. The contributions are grouped in three areas: semantic publishing (sempub), concept-level sentiment analysis (ssa), and linked-data enabled recommender systems (recsys).

  5. Game user experience evaluation

    CERN Document Server

    Bernhaupt, Regina

    2015-01-01

    Evaluating interactive systems for their user experience (UX) is a standard approach in industry and research today. This book explores the areas of game design and development and Human Computer Interaction (HCI) as ways to understand the various contributing aspects of the overall gaming experience. Fully updated, extended and revised this book is based upon the original publication Evaluating User Experience in Games, and provides updated methods and approaches ranging from user- orientated methods to game specific approaches. New and emerging methods and areas explored include physiologi

  6. Analysis in usability evaluations

    DEFF Research Database (Denmark)

    Følstad, Asbjørn; Lai-Chong Law, Effie; Hornbæk, Kasper

    2010-01-01

    While the planning and implementation of usability evaluations are well described in the literature, the analysis of the evaluation data is not. We present interviews with 11 usability professionals on how they conduct analysis, describing the resources, collaboration, creation of recommendations......, and prioritization involved. The interviews indicate a lack of structure in the analysis process and suggest activities, such as generating recommendations, that are unsupported by existing methods. We discuss how to better support analysis, and propose four themes for future research on analysis in usability...

  7. Educational Ethnology and Evaluation.

    Science.gov (United States)

    Pohland, Paul A.

    Ethnography may be used to inform the audience of a curriculum program with the activities of the educators and students involved. Thus the expository function of evaluation is best met by ethnography. A conceptual model developed at the Central Midwestern Regional Educational Laboratory incorporates ethnographic data and techniques into…

  8. Technical Evaluation Report

    National Research Council Canada - National Science Library

    Tipton, Michael J

    2005-01-01

    .... This evaluation provides a brief review of the papers presented at the meeting; the salient points of each paper are listed and the objectives (OBJ I-III) of the meeting they addressed noted. A few general comments are then made about the presentations and the meeting as a whole.

  9. Visual soil evaluation

    DEFF Research Database (Denmark)

    Visual Soil Evaluation (VSE) provides land users and environmental authorities with the tools to assess soil quality for crop performance. This book describes the assessment of the various structural conditions of soil, especially after quality degradation such as compaction, erosion or organic...

  10. Evaluation, Language, and Untranslatables

    DEFF Research Database (Denmark)

    Dahler-Larsen, Peter; Dahler-Larsen, Peter

    2017-01-01

    by means of specific exemplars. We provide a short dictionary of such exemplars delivered by evaluators, consultants, and teachers who work across a variety of contexts. We conclude with a few recommendations: highlight frictions in translatability by deliberately circulating and discussing words...

  11. On density forecast evaluation

    NARCIS (Netherlands)

    Diks, C.

    2008-01-01

    Traditionally, probability integral transforms (PITs) have been popular means for evaluating density forecasts. For an ideal density forecast, the PITs should be uniformly distributed on the unit interval and independent. However, this is only a necessary condition, and not a sufficient one, as

  12. Investment Project Efficiency Evaluation

    OpenAIRE

    Miljenko Crnjac; Dominika Crnjac

    2006-01-01

    Financial efficiency of investment project is being evaluated in this paper. It is showed that the net present value function is constant and that quota value is equal to c0 when i converges to the infinite. Optimal rates i are analyzed in certain cases and everything is illustrated through examples.

  13. Dokumentation og Evaluering

    DEFF Research Database (Denmark)

    Hjort, Katrin; Andersen, Peter Ø.; Skytthe Kaarsberg Schmidt, Lene

    Rapporten præsenterer resultaterne fra forskningsprojektet "Dokumentation og Evaluering mellem forvaltning og pædagogik". Projektet er gennemført i samarbejde mellem Københavns Universitet og Danmarks Pædagogiske Universitsskole, Århus Universitet og kortlægger, hvordan de nye lovkrav om dokument...

  14. Evaluering af VIFT

    DEFF Research Database (Denmark)

    Pedersen, Michael Svendsen

    Denne rapport indeholder en ekstern evaluering af aktiviteter i VIFT, Videncenter for bedre undervisning af tosprogede elever, der er etableret som et samarbejde mellem Videncenter for tosprogethed & interkulturalitet (UC2) ved Professionshøjskolen København (UCC), tidligere CVU København & Nords...

  15. Evaluating diagnostic tests

    African Journals Online (AJOL)

    Adele

    Appraising the predictive abilities of diagnostic tests can be surprisingly difficult. The purpose of this article is to provide an introduction to the principles underlying the objective evaluation of diagnostic tests. Starting from basic concepts about probability,. Bayes' theorem will be introduced and an explanation given as to.

  16. Multiple Stakeholders and Evaluation.

    Science.gov (United States)

    Eichelberger, R. Tony

    Evaluations occur within a political decision-making mileau, where multiple stakeholders are contending for limited funds. Given the subjective basis of empirical information, different conclusions or recommendations about a program may result from different ideological, theoretical, and disciplinary perspectives. The logic behind the…

  17. Evaluating your professionalism.

    Science.gov (United States)

    Burr, Steven; Neve, Hilary; Leung, Yee

    2016-11-02

    What does being professional look like? Does it mean that you do the 'right' thing, even when no-one is looking? How do you evaluate your professionalism knowledge, values and behaviour? How do you identify and address underperformance in professionalism? How can you transfer your professionalism to different circumstances?

  18. Tumor therapy evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Blattmann, H. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Kaser-Hotz, B.; Parvis, A. [Zurich Univ., Zurich (Switzerland)] [and others

    1997-08-01

    The aim of this program is to acquire data in order to evaluate the advantages of the proton spot scan technique compared to other forefront radiotherapy procedures, and to integrate the diagnostic and therapeutic possibilities of the life science department for human cancer therapy by testing it in veterinary radio-oncology. (author) 1 fig., 2 tab., 2 refs.

  19. Maintenance Resources Evaluation Technique.

    Science.gov (United States)

    1999-03-01

    Happ W. William. Gert: " Graphical Evaluation and Review Technique; Part 1. Fundamentals," The Journal of Industrial Engineering. Vol.: XVII No.5...1975. He received his commission in December 1979 upon graduation from Escuela de Aviation Militär. Then, he attended the Escuela de Ingenieria

  20. Evaluation of Inter Therapy

    DEFF Research Database (Denmark)

    Pedersen, Inge Nygaard

    2002-01-01

    This article (revised conference lecture from the 10th World Congress of Music Therapy, Oxford July 2002)) emphasizes the evaluation of the training of Inter Therapy for music therapy students at the MA training at Aalborg University. The students take turns in being client and therapist within...

  1. Evaluation in Higher Education

    Science.gov (United States)

    Bognar, Branko; Bungic, Maja

    2014-01-01

    One of the means of transforming classroom experience is by conducting action research with students. This paper reports about the action research with university students. It has been carried out within a semester of the course "Methods of Upbringing". Its goal has been to improve evaluation of higher education teaching. Different forms…

  2. Pervious Pavement System Evaluation

    Science.gov (United States)

    Pervious pavement is a low impact development stormwater control. The Urban Watershed Management Branch of the U.S. Environmental Protection Agency in Edison, NJ, is evaluating concrete pavers as a popular implementation. The pollutant removal of a bench-scale permeable interlo...

  3. Performance Evaluation Process.

    Science.gov (United States)

    1998

    This document contains four papers from a symposium on the performance evaluation process and human resource development (HRD). "Assessing the Effectiveness of OJT (On the Job Training): A Case Study Approach" (Julie Furst-Bowe, Debra Gates) is a case study of the effectiveness of OJT in one of a high-tech manufacturing company's product…

  4. Evaluating Open Source Portals

    Science.gov (United States)

    Goh, Dion; Luyt, Brendan; Chua, Alton; Yee, See-Yong; Poh, Kia-Ngoh; Ng, How-Yeu

    2008-01-01

    Portals have become indispensable for organizations of all types trying to establish themselves on the Web. Unfortunately, there have only been a few evaluative studies of portal software and even fewer of open source portal software. This study aims to add to the available literature in this important area by proposing and testing a checklist for…

  5. Evaluation Report 1

    International Development Research Centre (IDRC) Digital Library (Canada)

    2007-11-21

    productividad y el ingreso en el sector informal urbano de la economía: un estudio de caso y proyecto piloto en la Ciudad de Panamá”- No. 104121. Introduction/Purpose. The intent of this formative evaluation report is to comment upon progress ongoing from the initiation of project activity (November 21, 2007) until April 18 ...

  6. MITRE LAD Evaluation

    Science.gov (United States)

    1991-01-01

    Unauthorized Workstation Insertion ................................ 11 iv FAISS ACCESS TO DODHS ALTERNATIVES DCN: A-8752-105; January 15, 1991 I...Subsystem Interpretation of the Trusted Computer System Evaluation Criteria, NCSC-TG-009, Version-i, pp. 26-29. 29 -U FAISS ACCESS TO DODHS ALTERNATIVES

  7. Pupil Evaluation of Teachers.

    Science.gov (United States)

    Biggs, John; Chopra, Pran

    1979-01-01

    This investigation is concerned with (a) constructing a pupil evaluation of teachers (PET) scale, for use in grades 7-11, incorporating certain areas of teaching behavior, and affective pupil responses to teachers; and (b) using the scale as a source of feedback to both regular and student teachers. (Author)

  8. Quantitative evaluation of spasticity

    DEFF Research Database (Denmark)

    Lorentzen, Jakob

    2010-01-01

    er en vigtig faktor ved evaluering af refleksaktivitet og muskelstivhed i forbindelse med spasticitet. Den anden del af afhandlingen fokuserer på adskillelsen af forøget muskelstivhed betinget af forøget refleksaktivitet (aktiv stivhed) og stivhed betinget af strukturelle ændringer i muskler og led...

  9. From Evaluation to Accreditation

    DEFF Research Database (Denmark)

    Rasmussen, Palle

    for policy. In the state controlled and public financed Danish higher education system quality assessment became institutionalised in a national agency, the "evaluation centre", which was to do recurrent assessment of all higher education programmes. This was later given up. Recently accreditation...

  10. Quantitative evaluation of spasticity

    DEFF Research Database (Denmark)

    Lorentzen, Jakob

    er en vigtig faktor ved evaluering af refleksaktivitet og muskelstivhed i forbindelse med spasticitet. Den anden del af afhandlingen fokuserer på adskillelsen af forøget muskelstivhed betinget af forøget refleksaktivitet (aktiv stivhed) og stivhed betinget af strukturelle ændringer i muskler og led...

  11. Partial evaluation of pointcuts

    DEFF Research Database (Denmark)

    Klose, Karl; Ostermann, Klaus; Leuschel, Michael

    2007-01-01

    In aspect-oriented programming, pointcuts are usually compiled by identifying a set of shadows — that is, places in the code whose execution is potentially relevant for a pointcut — and inserting dynamic checks at these places for those parts of the pointcut that cannot be evaluated statically...

  12. Collection Evaluation and Evolution

    Science.gov (United States)

    Habermann, Ted; Kozimor, John

    2017-01-01

    We will review metadata evaluation tools and share results from our most recent CMR analysis. We will demonstrate results using Google spreadsheets and present new results in terms of number of records that include specific content. We will show evolution of UMM-compliance over time and also show results of comparing various CMR collections (NASA, non-NASA, and SciOps).

  13. Evaluation in participatory design

    DEFF Research Database (Denmark)

    Bossen, Claus; Dindler, Christian; Iversen, Ole Sejer

    2016-01-01

    his paper focuses on evaluation in Participatory Design (PD), and especially upon how the central aims of mutual learning, empowerment, democracy and workplace quality have been assessed. We surveyed all Participatory Design Conference papers (1990-2014) and papers from special journal issues on PD...

  14. Evaluating Communicative Tests.

    Science.gov (United States)

    Morrow, Keith

    The influence of the communicative approach to second language teaching on the design of the new Certificates in Communicative Skills in English tests is examined, and the evaluation of the tests in practice is discussed from that perspective. It is proposed that a number of characteristics of the new series should relate directly and consciously…

  15. Real-Time Evaluations

    Directory of Open Access Journals (Sweden)

    UNHCR

    2002-07-01

    Full Text Available A real-time evaluation (RTE is a timely, rapid andinteractive review of a fast evolving humanitarianoperation undertaken at an early phase. Its broadobjectives are to gauge the effectiveness and impactof a given UNHCR response and to ensure that itsfindings are used as an immediate catalyst fororganisational and operational change.

  16. Produce Sanitation System Evaluation

    Science.gov (United States)

    2011-05-01

    was also expected to improve food safety (i.e., reduce microbes) and reduce premature spoilage while minimizing environmental impact and unpleasant...PRECISION REDUCTION VEGETABLES CONTAMINATION TEST AND EVALUATION SAFETY PH FACTOR SANITATION FRESH FOODS MICROORGANISMS ...fruits and vegetables (FF&V) aboard Navy vessels, The sink saves labor associated with the washing of produce in food service operations by

  17. Evaluation by Proficiency Certification

    Science.gov (United States)

    Kerby, Dale

    1977-01-01

    Albuquerque Technical-Vocational Institute's system for grading business courses by proficiency certification in place of the traditional A through F system is described. A certificate is developed for each course, with evaluation of student performance in each area. This system requires a greater volume of paper work and skill analysis but it is…

  18. CMAQ Model Evaluation Framework

    Science.gov (United States)

    CMAQ is tested to establish the modeling system’s credibility in predicting pollutants such as ozone and particulate matter. Evaluation of CMAQ has been designed to assess the model’s performance for specific time periods and for specific uses.

  19. Evaluering af lokale udviklingsprocesser

    DEFF Research Database (Denmark)

    Jensen, Bente

    Rapporten udgør arbejdspapir nr 14 i forskningsprojektet "Handlekompetence i pædagogiske arbejde med socialt udsatte børn og unge - indsats og effekt (HPA-projektet). Rapporten diskuterer det grundlæggende spørgsmål: Hvad er evaluering? Herunder spørgsmål om hvilke dimensioner der skal medtænkes ...

  20. Training Evaluation: Clients' Roles.

    Science.gov (United States)

    Hashim, Junaidah

    2001-01-01

    A study was conducted of 262 training providers in Malaysia, where providers must be government approved. Government regulation, client demands for high quality, and an economic downturn that focused attention on training costs have all influenced evaluation in a positive direction. (SK)