WorldWideScience

Sample records for atlanto-occipital joint

  1. Feasibility of Ultrasound Guided Atlanto-occipital Joint Injection

    OpenAIRE

    Won, Sun Jae; Lee, U-Young; Cho, Sei Un; Rhee, Won Ihl

    2012-01-01

    Objective To evaluate the feasibility of ultrasound guided atlanto-occipital joint injection. Method Six atlanto-occipital joints of three cadavers were examined. Cadavers were placed in prone position with their head slightly rotated towards the contra-lateral side. The atlanto-occipital joint was initially identified with a longitudinal ultrasound scan at the midline between occipital protuberance and mastoid process. Contrast media 0.5cc was injected into the atlanto-occipital joint using ...

  2. Non-traumatic posterior atlanto-occipital joint dislocation

    OpenAIRE

    Takechi, Yasuhiko; Iizuka, Haku; Sorimachi, Yasunori; Ara, Tsuyoshi; Nishinome, Masahiro; Takagishi, Kenji

    2010-01-01

    This report presents a case of non-traumatic posterior atlanto-occipital dislocation. A 36-year-old female was referred with a history of numbness of the extremities, vertigo and neck pain for 1 year. The patient had no history of trauma. The axial rotation of range of motion of the cervical spine was severely restricted. A lateral cervical radiograph in the neutral position demonstrated a posterior atlanto-occipital dislocation. A coronal view on a computed tomography (CT) reconstruction ima...

  3. Intradural extraneural bilobate ganglion cyst of the atlanto-occipital joint compressing the hypoglossal nerve.

    Science.gov (United States)

    Giordano, Mario; Gerganov, Venelin M; Samii, Amir; Samii, Madjid

    2012-03-01

    Ganglion cysts (ganglia) are benign lesions of the soft tissue arising in the periarticular space. We present a 54-year-old woman with a 5-month history of headache and weakness of the tongue with deviation to the left side who had a rare extraneural intradural bilobate ganglion cyst of the atlanto-occipital joint compressing the hypoglossal nerve. An MRI showed a bilobate cystic lesion in the premedullary cistern on the left side at the level of the hypoglossal canal. This lesion was removed using a lateral suboccipital approach in the semi-sitting position with removal of the C1 hemiarch. The lesion proved to be a ganglion cyst on histopathology. Intracranial juxtafacet (ganglion and synovial) cysts compressing the hypoglossal nerve should be considered in the differential diagnosis with other lesions of this region. Although there was no recurrence at 30-month follow-up, there was no significant improvement of the tongue weakness. We describe our surgical strategy and discuss the pathogenesis of the cyst. PMID:22277565

  4. Cranio-vertebral junction anomaly: atlanto-occipital assimilation.

    Science.gov (United States)

    Pooja Jain, -; Khursheed Raza, -; Chiman Kumari, -; Manisha Hansda, -; Sb Ray, -

    2016-01-01

    Cranio-vertebral junction is a pivot which holds the globe of the head. Bony anomalies at this point are particularly significant because they lodge the spinal cord and lower part of the brain stem. Clinically fusion of the atlas with the lower part of the occiput is known as Atlanto-occipital assimilation or atlas occipitalization, which can be either partial or complete depending upon the extent of fusion. It can present as totally asymptomatic accidental finding or can be a cause behind major neuro-vascular compression. The present case study is an endeavor to explain occipitalization of atlas bone on the basis of embryology and explain its clinical relevance. PMID:27424507

  5. Posterior atlanto-occipital and atlanto-axial area and its surgical interest

    Directory of Open Access Journals (Sweden)

    Newton José Godoy Pimenta

    2014-10-01

    Full Text Available Classic anatomical studies describe two membranes – atlanto-occipital and atlanto-axial in the posterior aspect of the craniocervical region. During many surgical procedures in this area, however, we have not found such membranes. Objective To clarify the anatomical aspects and structures taking part of the posterior atlanto-occipital and atlanto-axial area. Method Analysis of histological cuts of three human fetuses and anatomical studies of 8 adult human cadavers. Results In both atlanto-occipital and atlanto-axial areas, we have observed attachment between suboccipital deep muscles and the spinal cervical dura. However, anatomical description of such attachments could not be found in textbooks of anatomy. Conclusion Our study shows the absence of the classical atlanto-occipital and atlanto-axial membranes; the occipito-C1 and C1-C2 posterior intervals are an open area, allowing aponeurotic attachment among cervical dura mater and posterior cervical muscles.

  6. Osteochondrosis of the occipital condyles and atlanto-occipital dysplasia in a Belgian horse

    OpenAIRE

    Muirhead, Tammy; McClure, J.T.; Bourque, Andrea; Pack, LeeAnn

    2003-01-01

    A lesion in the cervical region of a 14-month-old Belgian gelding with severe ataxia was suspected. Necropsy revealed symmetric focal cartilage defects compatible with osteochondrosis of the occipital condyles and atlanto-occipital dysplasia. To our knowledge this is the first equine report of symmetrical osteochondrosis of the occipital condyles causing neurologic signs.

  7. Traumatic Atlanto-Occipital Dislocation Presenting With Dysphagia as the Chief Complaint: A Case Report

    OpenAIRE

    Choi, Eun Hye; Jun, Ah Young; Choi, Eun Hi; Shin, Ka Young; Cho, Ah Ra

    2013-01-01

    We report a patient with traumatic atlanto-occipital dislocation who presented with dysphagia as the chief complaint. A 59-year-old man complained of swallowing difficulty for 2 months after trauma to the neck. On physical examination, there was atrophy of the right sternocleidomastoid and upper trapezius muscles, and the tongue was deviated to the right. In a videofluoroscopic swallowing study, penetration and aspiration were not seen, food residue remained in the right vallecula and pyrifor...

  8. Cervical Myelopathy Secondary to Atlanto-occipital Assimilation: The Usefulness of the Simple Decompressive Surgery

    OpenAIRE

    Kim, Kang Rae; Lee, Young Min; Kim, Young Zoon; Cho, Yong Woon; Kim, Joon Soo; Kim, Kyu Hong; Lee, In Chang

    2013-01-01

    Atlanto-occipital assimilation is one of the most common osseous anomalies observed at the craniocervical junction. Most patients with atlas assimilation show no symptom, but some have neurological problems such as myelopathy that may require surgical treatment. Occipitocervical fusion may be required if atlato-occipital assimilation is accompanied by occipito-axial instability. However, in cases of symptomatic atlas assimilation with minor cord compression without instability, simple decompr...

  9. MRI of the tectorial and posterior atlanto-occipital membranes in the late stage of whiplash injury

    International Nuclear Information System (INIS)

    Our aim was to characterise and classify permanent structural changes in the tectorial and posterior atlanto-occipital membranes several years after a whiplash injury, and to evaluate the reliability of our classification. We obtained sagittal proton density-weighted images of the craniovertebral junction of 92 whiplash-injured and 30 uninjured individuals. Structural abnormalities in the two membranes were classified as grades 1-3 independently by three radiologists blinded for clinical information. Grading criteria were based on reduced tectorial membrane thickness, and elongation or rupture of the posterior atlanto-occipital membrane/dura mater complex. The same images were reassessed 4 months later. Image quality was graded good in 104 cases, slightly reduced in 13 and unsatisfactory in five. Of 117 tectorial membranes 31 (26.5%) showed grade 2 or 3 lesions, in the uninjured group none were grade 3 and only three were grade 2. Pair-wise interobserver agreement (weighted kappa) was moderate (0.47-0.50), while the intraobserver agreement was moderate to good (0.51-0.70). Of 117 posterior atlanto-occipital membranes 20 (17.1%) had grade 2 or 3 lesions; there was no grade 3 and only one grade 2 lesion in the uninjured group. Inter- and intraobserver agreement was good (0.61-0.74 and 0.65-0.86, respectively). Reduced image quality was the main reason for disagreement, but partial thinning and lateral tapering, as normal tectorial membrane variations, created difficulties in some cases. This study strongly indicates that whiplash trauma can damage the tectorial and posterior atlanto-occipital membranes; this can be shown on high-resolution MRI. Better knowledge of normal anatomical variations and improved image quality should increase the reliability of lesion classification. (orig.)

  10. Observation on the Efficacy of Treating Atlanto-occipital F ascia Contracture Cervical Spondylosis with Needle-knife Technique and Gimmick%针刀配合手法治疗寰枕筋膜挛缩型颈椎病疗效观察

    Institute of Scientific and Technical Information of China (English)

    李伟; 孙霓虹; 赵昌谋

    2011-01-01

    To observe the clinical efficacy of treating atlanto-occipital fascia contracture cervical spondylosis with relaxing operation with small needle knife and gimmick. Method:34 patients were treated with relaxing operation with small needle knife and gimmick,observed after 2 courses of treatment and analyzed the clinical efficacy. Result:Afier two courses of treatment,21 cases were cured, 8cases were significantly effective, 3 cases were effectual,2 cases were ineffective, the total effective rate was 94.11%.Conclnsion:The needle-knife can loosen tight fascia contracture of the atlanto-occipital,increase atlanto-occipital gap,so as to reduce or lift the compression of vertebral artery and nerve; gimmick can clear the meridians,entire the joints,the combination can improve the clinical symptoms of patients with atlanto-occipital fascia contracture cervical spondylosis effectively.%目的:观察小针刀松解术配合手法治疗寰枕筋膜挛缩型颈椎病的临床疗效.方法:34例患者予以小针刀松解术配合手法治疗,治疗2个疗程后观察、分析临床疗效.结果:痊愈21例,显效8例,有效3例,无效2例,总有效率为94.11%.结论:针刀能松解紧张挛缩的寰枕筋膜,增大寰枕间隙,从而减轻或解除椎动脉及神经的压迫,加之手法可疏通经络、整复关节,两者结合能有效的改善寰枕筋膜挛缩型颈椎病患者临床症状.

  11. 寰枕后膜解剖结构及其临床意义%Anatomical structure of posterior atlanto-occipital membrane and its clinical significance

    Institute of Scientific and Technical Information of China (English)

    文朝; 潘会琴; 古安武; 熊卜贵; 尚如国; 曾云云

    2012-01-01

    Objective To observe the structure of the posterior altanto-occipital membrane and to stuffy the anatomical mechanism of vertebral artery insufficiency. Methods Ten cadaveric head-neck specimens were used to observe the posterior atlanto-occipital membrane and its surrounding structures and its relations with vertebral artery. Results Posterior atlanto-occipital membrane adhers to the vertebral artery, covers the vertebral artery in the sulcus arteriae vertebralis, and mechanical obstruction of the vertebral artery can occur in such places. Conclusions The posterior atlanto-occipital membrane and its surrounding structures can be the possible reason of the vertebral artery insufficiency of this potion. More observation, experiment study and radiological support are needed.%目的 观察寰枕后膜的解剖结构特点及其与椎动脉的解剖结构关系,探讨寰枕后膜挛缩对椎动脉供血不足的可能解剖学机制.方法 观察10具头颈部标本寰枕后膜的形态及其椎动脉第3段的解剖关系.结果 寰枕后膜与椎动脉第3段解剖关系紧密,在椎动脉行于寰椎椎动脉沟内时覆盖其上,双侧椎动脉在离开椎动脉沟进入枕骨大孔入颅时行走于寰枕后膜内,寰枕后膜对其有明显限制作用.结论 寰枕后膜对该段椎动脉有明显的限制固定作用,寰枕后膜病变、头颈部旋转运动时有引起椎动脉供血不足的解剖学基础,但需要更多解剖观察、实验验证及影像学支持.

  12. The vale of Multislice CT 3D- Reconstruction in the diagnosis of Atlanto-occipital fusion malformation%多层螺旋CT三维成像对寰枕融合畸形的诊断价值

    Institute of Scientific and Technical Information of China (English)

    李立; 谢晓红; 曾小辉

    2012-01-01

      Objective To evaluate the vale of Multi-slice Spiral CT in diagnosis of Atlanto-occipital fusion malformation. Mahtod MSCT were performed in 8 patients with Atlanto-occipital fusion malformation. The multi-plannar reconstruction(MPR),maximum intensity projection(MIP) and volume rendering technique(VR) images of cervical spine were reconstructed to display the Atlanto-occipital fusion malformation. Results Total of 8 patients with Atlanto-occipital fusion malformation were included, of wtich 7 patients were completed fusion, 1 patients were not totaly fused. Al patients combined with basilar in pression, 1 patient combined with vertebra synostosis and 2 patients combined with atlantoaxial dislocation. Conclusion Tree-dimensional multi-slice spiral CT has great value in diagnosis of Atlanto-occipital fusion malformation,.%  目的探讨多层螺旋CT诊断寰枕融合畸形的价值。方法对8例寰枕融合畸形患者用多层螺旋CT薄层扫描,分别用容积重建(VR),多平面重建(MPR),最大密度投影(MIP)法进行三维重建成像,观察对寰枕融合的显示情况。结果8例患者均发现寰枕融合畸形,其中7例完全融合,1例不完全融合;8例均合并有颅底凹陷,1例合并颈2、3阻滞椎,2例伴有寰枢关节半脱位。结论多层螺旋CT三维重建技术对寰枕融合畸形的诊断具及相邻结构的显示有非常重要的价值,可作为此类病人的常规检查方法。

  13. 寰枕后膜挛缩症的MSCT测量与研究%Measurement and study of MSCT in Atlanto-occipital Fascia Spastic Syndrome

    Institute of Scientific and Technical Information of China (English)

    曾莎莎; 郭建东; 黎江芽; 徐嵩

    2014-01-01

    目的:探讨MSCT在寰枕后膜挛缩症诊断价值,为临床诊疗提供参考。方法选取临床诊断为寰枕后膜挛缩症的患者60例(病例组)及正常人100例,使用GE Ligtspeed 16层螺旋CT行寰枕结合部扫描,将原始数据传至MSCT工作站进行VR、MPR等后处理,然后在VR、MPR等图像上观察、测量寰椎后弓与枕骨之间的最短骨性距离H、寰椎左侧椎动脉沟压迹最低点与枕骨之间的最短骨性距离H1、寰椎右侧椎动脉沟压迹最低点与枕骨之间的最短骨性距离H2。结果正常人H、H1、H2的均值与标准差分别为(8.43±1.89) mm、(10.59±1.54) mm、(10.39±1.27) mm,其中H、H1、H2的95%参考值范围分别为≥4.73 mm、≥7.57 mm、≥7.90 mm;病例组患者H、H1、H2的均值与标准差分别为(4.54±1.17) mm、(8.16±1.16) mm、(8.01±1.36) mm。病例组寰枕间隙宽度(H、H1、H2)均小于正常组,差异均有统计学意义(P<0.05)。结论 H、H1、H2三者结合能较全面及准确的反映寰枕间隙的宽度, MSCT对于寰枕后膜挛缩征的诊疗具有重要价值。%Objective To assess the value of MSCT in the diagnosis of Atlas Occipital Fascia Spastic Syn-drome, and provide parameters for clinical diagnosis and treatment. Methods 60 patients with clinical diagnosis of atlanto-occipital fascia spastic syndrome were selected and compared with 100 control subjects, GE Ligtspeed 16-slice spiral CT was used for atlanto-occipital junction scanning, then raw data were sent to the MSCT workstation, and then VR, MPR and other post-processing operations were performed. Data H (the shortest distance between posterior arch of the atlas and the occipital bone), H1 (the shortest distance between the lowest point of vertebral artery groove pres-sure trace on the left posterior arch of the atlas and the occipital bone), and H2 (the shortest distance between the low-est point of vertebral artery groove pressure trace on the right posterior

  14. Core curriculum illustration: traumatic atlanto-occipital dislocation.

    Science.gov (United States)

    Rajendran, Sibi; Nickels, David; Pawley, Barbara

    2016-08-01

    This is the 20th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at: http://www.aseronline.org/curriculum/toc.htm . PMID:27147526

  15. The helical three-dimensional CT in the diagnosis of torticollis with occipitocondylar hypoplasia

    International Nuclear Information System (INIS)

    Congenital anomalies of the atlanto-occipital and atlantoaxial joints are rare. Those most commonly reported are atlantoaxial instability, basilar impression, anomalies of the odontoid process, laxity of the transverse atlantal ligament and atlanto-occipital fusion. Occipital condylar hypoplasia is infrequent and difficult to recognise. We recently diagnosed it using helical 3D CT in association with torticollis in two patients. The first patient had a several year history of torticollis. The second patient had acute cervical lymphadenitis associated with post-operative torticollis. 3D CT distinctly revealed atlantoaxial subluxation with hypoplasia of the occipital condyles in both cases. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)

  16. The helical three-dimensional CT in the diagnosis of torticollis with occipitocondylar hypoplasia

    Energy Technology Data Exchange (ETDEWEB)

    Ilkko, E.; Tikkakoski, T.; Pyhtinen, J. [Department of Radiology, Oulu University Hospital, Kajaanintie 50, 90220 Oulu (Finland)

    1998-11-01

    Congenital anomalies of the atlanto-occipital and atlantoaxial joints are rare. Those most commonly reported are atlantoaxial instability, basilar impression, anomalies of the odontoid process, laxity of the transverse atlantal ligament and atlanto-occipital fusion. Occipital condylar hypoplasia is infrequent and difficult to recognise. We recently diagnosed it using helical 3D CT in association with torticollis in two patients. The first patient had a several year history of torticollis. The second patient had acute cervical lymphadenitis associated with post-operative torticollis. 3D CT distinctly revealed atlantoaxial subluxation with hypoplasia of the occipital condyles in both cases. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)

  17. Interobserver reliability and intraobserver reproducibility of powers ratio for assessment of atlanto-occipital junction: comparison of plain radiography and computed tomography

    OpenAIRE

    Li, Gang; Passias, Peter; Kozanek, Michal; Shannon, Brian D.; Li, Guoan; Villamil, Fernando; Bono, Christopher M.; Harris, Mitchel; Wood, Kirkham B.

    2009-01-01

    Powers ratio, as assessed on plain radiographs or computed tomography (CT) images, appears to have clinical and prognostic value. To date, the validation of this assessment tool has been limited to a small number of observers at a single site. No study has examined the intraobserver reproducibility and interobserver reliability of the Powers ratio measurement on plain radiographs or CT images among a large cohort of spine surgeons. This type of validation is critical to allow for the broader ...

  18. Treatment of Cervicogenic Headache with Cervical Epidural Steroid Injection

    OpenAIRE

    Wang, Eugene; Wang, Dajie

    2014-01-01

    Cervicogenic headache (CGH) is defined as referred pain from various cervical structures innervated by the upper three cervical spinal nerves. Such structures are potential pain generators, and include the atlanto-occipital joint, atlantoaxial joint, C2-3 zygapophysial joint, C2-3 intervertebral disc, cervical myofascial trigger points, as well as the cervical spinal nerves. Various interventional techniques, including cervical epidural steroid injection (CESI), have been proposed to treat th...

  19. Joint swelling

    Science.gov (United States)

    Swelling of a joint ... Joint swelling may occur along with joint pain . The swelling may cause the joint to appear larger or abnormally shaped. Joint swelling can cause pain or stiffness. After an ...

  20. A study of the motion pivot in the spine——The measurement of the angle between the vertebra body and the inferior articular facet and its application in the spinal manipulation

    Institute of Scientific and Technical Information of China (English)

    WeiYizong

    2004-01-01

    spinal motion pivot, spinal manipulation, the angle of facet joint, force direction, cylinder pivot motion theory The spinal joint consists of a disc and posterior facet joints. It is the biomechanical structure that enables the spine with six (6) freedoms of movements of flexion/extension, side bends and rotations. We identified that the same spinal joints initiate, eliminate and control spinal movement. These four joints are the atlanto-occipital and the atlanto-odontoid joints, C7/T 1, T12/L1 and L5/S1. The word“pivot”is commonly used to describe an important ruruing porint or matter in Chinese language.We define the above four joints as“pivots” in this article.The joints are briefed as“Occipital-vertebral pivot”(atlanto-occipital and atlanto-odontoid joint),“cervicalthoracic pivot” (C7/T1),“thoracic-lumbar pivot” (T12/L1)and“lumbar-sacrum pivot”(L5/S1). After measuring 20 human spinal columns (dry bones), observing the angle between the vertebral body and the inferior articular faeet,reviewing the spinal anatomy and biomechanics and analyzing the Chinese spinal manipulation techniques and theory, the following is our report:

  1. A pictorial review of atlanto-axial rotatory fixation: Key points for the radiologist

    International Nuclear Information System (INIS)

    Atlanto-axial rotatory fixation (AARF) is a rare condition which occurs more commonly in children than in adults. The terminology can be confusing and the condition is also known as 'atlanto-axial rotatory subluxation' and 'atlanto-axial rotary dislocation'. Rotatory fixation is the preferred term, however, as in most cases the fixation occurs within the normal range of rotation of the joint. By definition, therefore, the joint is neither subluxed nor dislocated. AARF is a cause of acquired torticollis. Diagnosis can be difficult and is often delayed. The radiologist plays a key role in confirming the diagnosis. The classification system proposed by Fielding in 1977 is most frequently used and will be discussed in detail. Given that this classification system was devised in the days before computed tomography (CT), as well as the fact that combined atlanto-axial and atlanto-occipital rotatory subluxation (AORF) is omitted from the classification, we propose a modification to the classification of this rare but significant disorder. The radiological findings in six cases of AARF will be illustrated, including a case with associated atlanto-occipital subluxation. The pertinent literature is reviewed and a more comprehensive classification system proposed. The imaging approach to diagnosis and the orthopaedic approach to management will be discussed. Roche, C.J. et al. (2001)

  2. A pictorial review of atlanto-axial rotatory fixation: Key points for the radiologist

    Energy Technology Data Exchange (ETDEWEB)

    Roche, Clare J.; O' Malley, Michael; Dorgan, John C.; Carty, Helen M

    2001-12-01

    Atlanto-axial rotatory fixation (AARF) is a rare condition which occurs more commonly in children than in adults. The terminology can be confusing and the condition is also known as 'atlanto-axial rotatory subluxation' and 'atlanto-axial rotary dislocation'. Rotatory fixation is the preferred term, however, as in most cases the fixation occurs within the normal range of rotation of the joint. By definition, therefore, the joint is neither subluxed nor dislocated. AARF is a cause of acquired torticollis. Diagnosis can be difficult and is often delayed. The radiologist plays a key role in confirming the diagnosis. The classification system proposed by Fielding in 1977 is most frequently used and will be discussed in detail. Given that this classification system was devised in the days before computed tomography (CT), as well as the fact that combined atlanto-axial and atlanto-occipital rotatory subluxation (AORF) is omitted from the classification, we propose a modification to the classification of this rare but significant disorder. The radiological findings in six cases of AARF will be illustrated, including a case with associated atlanto-occipital subluxation. The pertinent literature is reviewed and a more comprehensive classification system proposed. The imaging approach to diagnosis and the orthopaedic approach to management will be discussed. Roche, C.J. et al. (2001)

  3. Joint ventures

    DEFF Research Database (Denmark)

    Sørensen, Karsten Engsig

    Afhandlingen analysere de konkurrenceretlige og selskabsretlige regler som er bestemmende for hvordan et joint venture samarbejde er struktureret......Afhandlingen analysere de konkurrenceretlige og selskabsretlige regler som er bestemmende for hvordan et joint venture samarbejde er struktureret...

  4. Joint Disorders

    Science.gov (United States)

    A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including Arthritis - inflammation of a joint. It causes pain, stiffness, and swelling. Over time, ...

  5. Coracoclavicular joint

    International Nuclear Information System (INIS)

    The coracoclvicular joint, a rear abnormality which may be the cause of pain in the shoulder and limitation of motion of the shoulder joint, is discussed. A case of coracoclvicular joint with shoulder pain was observed in 65 yrs old Korean male

  6. Transition joint

    International Nuclear Information System (INIS)

    A transition joint is disclosed for joining together tubular pieces formed respectively from a low alloy or carbon steel and a high temperature alloy composition having substantially different characteristics such as coefficient of thermal expansion, the transition joint including a plurality of tubular parts interconnected with each other by means of friction weld joints formed at an angle of 900 to the axis of the transition joint, the tubular parts at opposite ends of the transition joint being selected to facilitate in situ welding to the low alloy or carbon steel and high temperature alloy respectively. This friction welded transition joint can be used whenever different tubular pieces need to be joined together so that the joint can withstand high temperatures, for instance in heat exchangers and the such like. (Auth.)

  7. Joint pain

    Science.gov (United States)

    ... or conditions. It may be linked to arthritis , bursitis , and muscle pain . No matter what causes it, ... Autoimmune diseases such as rheumatoid arthritis and lupus Bursitis Chondromalacia patellae Crystals in the joint: gout (especially ...

  8. Joint imaging

    International Nuclear Information System (INIS)

    Joint imaging is a proven diagnostic procedure which has become indispensable to the detection and treatment of different joint diseases in almost all disciplines. The method is suited for early diagnosis of joint affections both in soft tissue and bone which cannot be detected by X-ray or other procedures. The local activity accumulation depends on the rate of metabolism and is visualized in the scan, which in turn enables the extension and floridity of focal lesions to be evaluated and followed-up. Although joint scans may often give hints to probabilities relevant to differential diagnosis, the method is non-specific and only useful if based on the underlying clinical picture and X-ray finding, if possible. The radiation exposure is very low and does not represent a hazard in cases of adequate assessment of indication. In pregnant women and children the assessment of indication has to be based on very strict principles. The method is suited for out-patient diagnosis and can be applied in all installations equipped with a gamma camera and a technetium generator. (orig.)

  9. Joint purpose?

    DEFF Research Database (Denmark)

    Pristed Nielsen, Helene

    2013-01-01

    Starting from Crenshaw´s point that antiracism often fails to interrogate patriarchy and that feminism often reproduces racist practices (1991: 1252), this paper asks: What are the theoretical reasons for believing that feminism and anti-racism can be regarded as fighting for the joint purpose of...... anti-discrimination in Europe today? And what empirical evidence may be found for such a joint approach? The paper discusses how the contemporary EU context differs from the American context which prompted Crenshaw to raise the point about intersectionality, and it analyses documents and interviews...... from each of the two European umbrella organisations the European Women´s Lobby and the European Network against Racism, as well as a number of their national member organisations from across Europe, both within EU and non-EU member states....

  10. Knee joint replacement

    Science.gov (United States)

    Knee joint replacement is a surgery to replace a knee joint with a man-made joint. The artificial joint is called a prosthesis . ... cartilage and bone are removed from the knee joint. Man-made pieces are then placed in the ...

  11. Reliability of Tubular Joints

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard; Thoft-Christensen, Palle

    In this paper the preliminary results obtained by tests on tubular joints are presented. The joints are T-joints and the loading is static. It is the intention in continuation of these tests to perform tests on other types of joints (e.g. Y-joints) and also with dynamic loading. The purpose of th...

  12. Joint Replacement Surgery

    Science.gov (United States)

    ... a Clinical Trial Journal Articles Arthritis July 2014 Joint Replacement Surgery: Health Information Basics for You and Your Family What Is Joint Replacement Surgery? Joint replacement surgery is removing a ...

  13. Joint x-ray

    Science.gov (United States)

    X-ray - joint; Arthrography; Arthrogram ... x-ray technologist will help you position the joint to be x-rayed on the table. Once in place, pictures are taken. The joint may be moved into other positions for more ...

  14. Joint instability and osteoarthritis.

    Science.gov (United States)

    Blalock, Darryl; Miller, Andrew; Tilley, Michael; Wang, Jinxi

    2015-01-01

    Joint instability creates a clinical and economic burden in the health care system. Injuries and disorders that directly damage the joint structure or lead to joint instability are highly associated with osteoarthritis (OA). Thus, understanding the physiology of joint stability and the mechanisms of joint instability-induced OA is of clinical significance. The first section of this review discusses the structure and function of major joint tissues, including periarticular muscles, which play a significant role in joint stability. Because the knee, ankle, and shoulder joints demonstrate a high incidence of ligament injury and joint instability, the second section summarizes the mechanisms of ligament injury-associated joint instability of these joints. The final section highlights the recent advances in the understanding of the mechanical and biological mechanisms of joint instability-induced OA. These advances may lead to new opportunities for clinical intervention in the prevention and early treatment of OA. PMID:25741184

  15. Spacesuit mobility knee joints

    Science.gov (United States)

    Vykukal, H. C. (Inventor)

    1979-01-01

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

  16. Joint fluid Gram stain

    Science.gov (United States)

    Gram stain of joint fluid ... A sample of joint fluid is needed. The fluid sample is sent to a lab where a small drop is placed in a ... on how to prepare for the removal of joint fluid, see joint fluid aspiration .

  17. Butt Joint Tool Commissioning

    Energy Technology Data Exchange (ETDEWEB)

    Martovetsky, N N

    2007-12-06

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

  18. Culture - joint fluid

    Science.gov (United States)

    Joint fluid culture ... fungi, or viruses grow. This is called a culture. If these germs are detected, other tests may ... is no special preparation needed for the lab culture. How to prepare for the removal of joint ...

  19. Temporomandibular Joint Dysfunction

    Science.gov (United States)

    The temporomandibular joint (TMJ) connects your jaw to the side of your head. When it works well, it enables you to ... For people with TMJ dysfunction, problems with the joint and muscles around it may cause Pain that ...

  20. Knee joint replacement - slideshow

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/presentations/100088.htm Knee joint replacement - series To use the sharing features ... 4 out of 4 Normal anatomy Overview The knee is a complex joint. It contains the distal ...

  1. Shoulder Joint Replacement

    Science.gov (United States)

    ... en because of implant loosening, wear, infection, and dislocation. When this occurs, a second joint replacement surgery — called a revision surgery — may be necessary. Is Shoulder Joint Replacement for You? The decision to have ...

  2. International joint ventures

    DEFF Research Database (Denmark)

    Sørensen, Karsten Engsig

    2001-01-01

    The article analysis problems connected with corporate joint ventures. Among others the possible conflicts between the joint venture agreement and the statutes of the companies is examined, as well as certain problems connected to the fact that the joint venture partners have created commen control...

  3. Managing Joint Production Motivation

    DEFF Research Database (Denmark)

    Lindenberg, Siegwart; Foss, Nicolai Juul

    2011-01-01

    We contribute to the microfoundations of organizational performance by proffering the construct of joint production motivation. Under such motivational conditions individuals see themselves as part of a joint endeavor, each with his or her own roles and responsibilities; generate shared represent......We contribute to the microfoundations of organizational performance by proffering the construct of joint production motivation. Under such motivational conditions individuals see themselves as part of a joint endeavor, each with his or her own roles and responsibilities; generate shared...... representations of actions and tasks; cognitively coordinate cooperation; and choose their own behaviors in terms of joint goals. Using goal-framing theory, we explain how motivation for joint production can be managed by cognitive/symbolic management and organizational design....

  4. Sacroiliac joint pain - aftercare

    Science.gov (United States)

    The sacroiliac joint (SIJ) is a term used to describe the place where the sacrum and the iliac bones join. The ... The main purpose of the joint is to connect the spine and the pelvis. As a result, there is very little movement at the SIJ. Major reasons ...

  5. JET Joint Undertaking

    International Nuclear Information System (INIS)

    The paper presents the progress report of the Joint European Torus (JET) Joint Undertaking, 1986. The report contains a survey of the scientific and technical achievements on JET during 1986; the more important articles referred to in this survey are reproduced as appendices to this Report. The last section discusses developments which might improve the overall performance of the machine. (U.K.)

  6. "Nonfloating" universal joint

    Science.gov (United States)

    Appleberry, W. T.

    1978-01-01

    Modified crowned-spline joint is lightweight, durable, and requires minimum of parts. It does not use rubber cushions to limit play and is useful over wide temperature range. It has inner ball and socket to provide rigid connection with no axial play. Joint can be adapted to form pinned connection between segmented torque tubes.

  7. MR diagnosis of temporomandibular joint. A study of joint effusion

    Energy Technology Data Exchange (ETDEWEB)

    Kaneda, Takashi; Yamashiro, Mitsuaki; Ozawa, Kaoru; Suzuki, Hiromi; Okada, Hiroyuki; Yamamoto, Hirotsugu [Nihon Univ., Matsudo, Chiba (Japan). School of Dentistry

    1998-03-01

    The purposes of this study were to evaluate the relationship between correlation of MR joint effusion of the temporomandibular joint and disk position, to evaluate the relationship between joint effusion and aging, and to assess the frequency of MR joint effusion of bilateral temporomandibular joints. The temporomandibular joints of 192 patients with clinical symptoms of temporomandibular joint disorders were imaged bilaterally using high field, surface-coil MR imaging. Oblique sagittal and coronal proton density-weighted and T2-weighted images were obtained. Imaging findings of joint effusion were correlated with disk position, aging, and bilateral temporomandibular joints. MR showed effusion in 4% of the joints with normal superior disk position, 36% of the joints with disk displacement with reduction, and 45% of the joints with disk displacement without reduction. There were significant differences in the incidence of joint effusion between normal disk position and anterior disk displacement with or without reduction. Younger patients less than 40 years were significant higher the incidence of joint effusion than those of older patients. A significant association was seen between joint effusion and aging. MR showed effusion in 17% of the unilateral temporomandibular joint, 24% of the bilateral temporomandibular joints. There was no significant difference between unilateral and bilateral case. These results indicated that joint effusion using MR imaging was associated with varied temporomandibular joint pathologic states. (author)

  8. MR diagnosis of temporomandibular joint. A study of joint effusion

    International Nuclear Information System (INIS)

    The purposes of this study were to evaluate the relationship between correlation of MR joint effusion of the temporomandibular joint and disk position, to evaluate the relationship between joint effusion and aging, and to assess the frequency of MR joint effusion of bilateral temporomandibular joints. The temporomandibular joints of 192 patients with clinical symptoms of temporomandibular joint disorders were imaged bilaterally using high field, surface-coil MR imaging. Oblique sagittal and coronal proton density-weighted and T2-weighted images were obtained. Imaging findings of joint effusion were correlated with disk position, aging, and bilateral temporomandibular joints. MR showed effusion in 4% of the joints with normal superior disk position, 36% of the joints with disk displacement with reduction, and 45% of the joints with disk displacement without reduction. There were significant differences in the incidence of joint effusion between normal disk position and anterior disk displacement with or without reduction. Younger patients less than 40 years were significant higher the incidence of joint effusion than those of older patients. A significant association was seen between joint effusion and aging. MR showed effusion in 17% of the unilateral temporomandibular joint, 24% of the bilateral temporomandibular joints. There was no significant difference between unilateral and bilateral case. These results indicated that joint effusion using MR imaging was associated with varied temporomandibular joint pathologic states. (author)

  9. Joint Quantum Institute

    Data.gov (United States)

    Federal Laboratory Consortium — The Joint Quantum Institute (JQI) is pursuing that goal through the work of leading quantum scientists from the Department of Physics of the University of Maryland...

  10. Joint Injection/Aspiration

    Science.gov (United States)

    ... Working It Out: Common Techniques for Conflict Resolution Workplace Diversity & Team Performance CME & MOC Understanding MOC ACR's MOC ... infection is suspected, aspirating the joint to gather cultures is ... Communications and Marketing. This patient information is provided for ...

  11. MP Joint Arthritis

    Science.gov (United States)

    ... Therapist? Media Find a Hand Surgeon MP Joint Arthritis Email to a friend * required fields From * To * ... in to name and customize your collection. DESCRIPTION Arthritis is the wearing away of the cartilage at ...

  12. Hip joint replacement

    Science.gov (United States)

    ... may have problems with infection, loosening, or even dislocation of the new hip joint. Over time the artificial ... Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery, San Francisco, ...

  13. Temporomandibular Joint Disorder

    Science.gov (United States)

    ... 2008 Previous Next Related Articles: Temporomandibular Joint Disorder (TMD) Are You Biting Off More Than You Can Chew? Equilibration May Lessen TMD Pain Fender-benders: Source of TMD? First Comes ...

  14. Healthy Joints Matter

    Science.gov (United States)

    ... dietary supplements, such as green tea and various vitamins, to see if they can keep your joints ... body, such as your ears, nose, and windpipe. Fibromyalgia (fi-bro-my-AL-juh). A condition that ...

  15. Joint contingency contracting

    OpenAIRE

    Johnson, Ellsworth K.; Paton, Bryan H.; Threat, Edward W.; Haptonstall, Lisa A.

    2005-01-01

    The purpose of this Master of Business Administration (MBA) Professional Report is to investigate and analyze the means by which Contingency Contracting Officers (CCO) can effectively operate in a Joint contingency environment and to validate the Defense Contract Management Agency's (DCMA) entry and exit criteria for contingency contracting missions. Joint contingencies encompass regional conflicts, humanitarian and peacekeeping missions, and international or domestic disaster relief missions...

  16. Joint Aspiration: Arthrocentesis

    OpenAIRE

    Mackie, John William

    1987-01-01

    Joint aspiration is an easily mastered procedure used to confirm or rule out joint sepsis and crystal-induced arthrosis. It is routinely performed with or without local anaesthetic, or with cooling spray. The time spent obtaining the fluid is short. The procedure is safe, requiring no hospitalization, except in the case of diagnosed sepsis. Arthrocentesis is a necessary procedure to prove beyond reasonable doubt that infection is not the cause of the arthritis. The family physician must be fa...

  17. Joint Venture Contracts

    OpenAIRE

    Pimentel, Dinarco

    2015-01-01

    Joint Venture contracts are contracting models typically designed to reach international markets. In spite of being used at the national level, a joint venture is based on single or multiple contracts between two individuals, two institutions, two organizations or two different entrepreneurial entities joining forces, meeting synergies to reach a common goal.Initially, these types of contracts were justifiable based on the need of different economic agents penetrating the most inaccessible ma...

  18. A symptomatic coracoclavicular joint.

    Science.gov (United States)

    Cheung, T F S; Boerboom, A L; Wolf, R F E; Diercks, R L

    2006-11-01

    Bilateral coracoclavicular joints were found in a 44-year-old male patient following a fall. He had an Indonesian mother and a Dutch father. Prior to the injury he was asymptomatic and had full range of movement in both shoulders but the trauma resulted in pain and limitation of movement in the left shoulder which required resection of the anomalous joint, after which full pain-free movement was restored. PMID:17075101

  19. Forming a multinational joint venture

    International Nuclear Information System (INIS)

    This paper discusses the basis and mechanics for forming a multinational joint venture. The topics of the paper include the motivations for a joint venture, selection of the appropriate co-venturer, management of the multinational joint venture, and the joint venture agreement. The authors state that a joint venture is not applicable or desirable in all instances and to be successful, must be carefully planned

  20. The temporomandibular joint

    International Nuclear Information System (INIS)

    Whilst the temporomandibular joint is in many ways unique, it is subject to all the diseases and disorders found in joints in other parts of the human skeleton. By far the most common disorder is injury, followed by arthropathy, acute and chronic dislocations, ankylosis, and in rare instances, neoplasms. The diagnosis and management of the temporomandibular joint are the primary responsibility of the oral surgeon. Nevertheless, this anatomical region is an area in which the cooperation of medical and dental disciplines may be required for the satisfactory conclusion of treatment. The more so when the disease process involves either associated psychosomatic illness or malignancy. The mainstay of the diagnosis is a careful radiological examination of the joint. There exists a delicate relationship between the dentition, the muscles of mastication, and the temporomandibular articulation, which is controlled by arthrokinetic reflex activity of the branches of the 5th cranial nerve. Imbalance between one or more of the components of this integrated system frequently leads to disturbances in function. Pain-dysfunction disorders constitute the larger part of temporomandibular joint disturbances generally encountered

  1. Periprosthetic Joint Infections

    Directory of Open Access Journals (Sweden)

    Ana Lucia L. Lima

    2013-01-01

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

  2. Distal radioulnar joint injuries.

    Science.gov (United States)

    Thomas, Binu P; Sreekanth, Raveendran

    2012-09-01

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

  3. Distal radioulnar joint injuries

    Directory of Open Access Journals (Sweden)

    Binu P Thomas

    2012-01-01

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

  4. Total ankle joint replacement.

    Science.gov (United States)

    2016-02-01

    Ankle arthritis results in a stiff and painful ankle and can be a major cause of disability. For people with end-stage ankle arthritis, arthrodesis (ankle fusion) is effective at reducing pain in the shorter term, but results in a fixed joint, and over time the loss of mobility places stress on other joints in the foot that may lead to arthritis, pain and dysfunction. Another option is to perform a total ankle joint replacement, with the aim of giving the patient a mobile and pain-free ankle. In this article we review the efficacy of this procedure, including how it compares to ankle arthrodesis, and consider the indications and complications. PMID:26868932

  5. Transversely Compressed Bonded Joints

    DEFF Research Database (Denmark)

    Hansen, Christian Skodborg; Schmidt, Jacob Wittrup; Stang, Henrik

    2012-01-01

    The load capacity of bonded joints can be increased if transverse pressure is applied at the interface. The transverse pressure is assumed to introduce a Coulomb-friction contribution to the cohesive law for the interface. Response and load capacity for a bonded single-lap joint was derived using...... non-linear fracture mechanics. The results indicated a good correlation between theory and tests. Furthermore, the model is suggested as theoretical base for determining load capacity of bonded anchorages with transverse pressure, in externally reinforced concrete structures....

  6. Expansion joints for LMFBR

    International Nuclear Information System (INIS)

    This discourse recounts efforts put into the SNR-2 project; specifically the development of compensation devices. The various prototypes of these compensation devices are described and the state of the development reviewed. Large Na (sodium)-heat transfer systems require a lot of valuable space if the component lay-out does not include compensation devices. So, in order to condense the spatial requirement as much as possible, expansion joints must be integrated into the pipe system. There are two basic types to suit the purpose: axial expansion joints and angular expansion joints. The expansion joints were developed on the basis of specific design criteria whereby differentiation is made between expansion joints of small and large nominal diameter. Expansion joints for installation in the sodium-filled primary piping are equipped with safety bellows in addition to the actual working bellows. Expansion joints must be designed and mounted in a manner to completely withstand seismic forces. The design must exclude any damage to the bellows during intermittent operations, that is, when sodium is drained the bellows' folds must be completely empty; otherwise residual solidified sodium could destroy the bellows when restarting. The expansion joints must be engineered on the basis of the following design data for the secondary system of the SNR project: working pressure: 16 bar; failure mode pressure: 5 events; failure mode: 5 sec., 28.5 bar, 520 deg. C; working temperature: 520 deg. C; temperature transients: 30 deg. C/sec.; service life: 200,000 h; number of load cycles: 104; material: 1.4948 or 1.4919; layer thickness of folds: 0.5 mm; angular deflection (DN 800): +3 deg. C or; axial expansion absorption (DN 600): ±80 mm; calculation: ASME class. The bellows' development work is not handled within this scope. The bellows are supplied by leading manufacturers, and warrant highest quality. Multiple bellows were selected on the basis of maximum elasticity - a property

  7. Imaging the temporomandibular joint

    Energy Technology Data Exchange (ETDEWEB)

    Katzberg, R.W.; Manzione, J.V.; Westesson, P.L.

    1988-01-01

    This book encompasses all imaging modalities as they apply to the Temporomandibular Joint and its disorders. The volume employs correlative line drawings to elaborate on diagnostic images. It helps teach methods of TMJ imaging and describes findings identified by different imaging modalities to both radiologists and dental clinicians.

  8. Imaging the temporomandibular joint

    International Nuclear Information System (INIS)

    This book encompasses all imaging modalities as they apply to the Temporomandibular Joint and its disorders. The volume employs correlative line drawings to elaborate on diagnostic images. It helps teach methods of TMJ imaging and describes findings identified by different imaging modalities to both radiologists and dental clinicians

  9. Temporomandibular joint imaging

    International Nuclear Information System (INIS)

    The temporomandibular joint (TMJ) though close to the surface is one of the most difficult structures to visualise effectively. This is mainly due to the presence of dense bony structures which become superimposed over the image of the joint. The need to visualise this anatomical area is on the increase as more and more patients actively seek treatment for problems related to, and associated with, the craniomandibular articulation. Conventional radiographic techniques used to evaluate the joint have been designed to cope with the unique combination of hard and soft tissues and airspaces found in the maxillofacial region, but still have limitations. With the advent of the space age with its new materials, silicon chips and microcomputers, radiography has given way to diagnostic imaging which covers a range of modalities such as computerised tomography, magnetic resonance imaging, ultrasound and thermography. These are now available to assist in obtaining a clearer picture of the internal structures of the TMJ without the problems of superimposition previously encountered. This article is a resume of the radiographic techniques and a review of the current imaging methods available for assessing disorders of the temporomandibular joint. 21 refs., 3 tabs., 14 figs

  10. Keyed shear joints

    DEFF Research Database (Denmark)

    Hansen, Klaus

    This report gives a summary of the present information on the behaviour of vertical keyed shear joints in large panel structures. An attemp is made to outline the implications which this information might have on the analysis and design of a complete wall. The publications also gives a short...

  11. An analysis of a joint shear model for jointed media with orthogonal joint sets

    International Nuclear Information System (INIS)

    This report describes a joint shear model used in conjunction with a computational model for jointed media with orthogonal joint sets. The joint shear model allows nonlinear behavior for both joint sets. Because nonlinear behavior is allowed for both joint sets, a great many cases must be considered to fully describe the joint shear behavior of the jointed medium. An extensive set of equations is required to describe the joint shear stress and slip displacements that can occur for all the various cases. This report examines possible methods for simplifying this set of equations so that the model can be implemented efficiently form a computational standpoint. The shear model must be examined carefully to obtain a computationally efficient implementation that does not lead to numerical problems. The application to fractures in rock is discussed. 5 refs., 4 figs

  12. Joint Infection (Beyond the Basics)

    Science.gov (United States)

    ... for some deep joints (eg, hip, shoulder), surgical placement of a drainage tube. ARTIFICIAL JOINT INFECTION — People ... medications, the user is advised to check the product information sheet accompanying each drug to verify conditions ...

  13. Joint cumulants for natural independence

    OpenAIRE

    Hasebe, Takahiro; Saigo, Hayato

    2011-01-01

    Many kinds of independence have been defined in non-commutative probability theory. Natural independence is an important class of independence; this class consists of five independences (tensor, free, Boolean, monotone and anti-monotone ones). In the present paper, a unified treatment of joint cumulants is introduced for natural independence. The way we define joint cumulants enables us not only to find the monotone joint cumulants but also to give a new characterization of joint cumulants fo...

  14. Chapter 17. Bone joints

    International Nuclear Information System (INIS)

    The use of radioisotopes for exploration of the joints and treatment of articular diseases is examined. The joint socket is explored by arthroscintigraphy, a technique applied on a routine basis only to the knee and performed by intra-articular injection of a sup(99m)Tc-labelled colloid. Arthroscintigraphy can be used especially to foresee and to check the distribution of radioactive products employed by synoviortheses (treatment by local injection). Synovial explorations are carried out by iodine 131 - or technetium-99m-labelled albumine and the pertechnetate ion which, injected intraveinously, build up in the inflamed synovial membrane to an extent increasing with the degree of inflammation. The exploration in both qualitative and quantitative. The methode, which uses a conventional scintigraph or a scintillation camera, is described. The treatments discussed are of both the local and general type

  15. JET Joint Undertaking

    International Nuclear Information System (INIS)

    The paper presents the annual report of the Joint European Torus (JET) Joint Undertaking, 1986. The report is divided into two parts: a part on the scientific and technical programme of the project, and a part setting out the administration and organisation of the Project. The first part includes: a summary of the main features of the JET apparatus, the JET experimental programme, the position of the Project in the overall Euratom programme, and how JET relates to other large fusion devices throughout the world. In addition, the technical status of JET is described, as well as the results of the JET operations in 1986. The final section of the first part outlines the proposed future programme of JET. (U.K.)

  16. Joint International Accelerator School

    CERN Multimedia

    CERN Accelerator School

    2014-01-01

    The CERN and US Particle Accelerator Schools recently organised a Joint International Accelerator School on Beam Loss and Accelerator Protection, held at the Hyatt Regency Hotel, Newport Beach, California, USA from 5-14 November 2014. This Joint School was the 13th in a series of such schools, which started in 1985 and also involves the accelerator communities in Japan and Russia.   Photo courtesy of Alfonse Pham, Michigan State University.   The school attracted 58 participants representing 22 different nationalities, with around half from Europe and the other half from Asia and the Americas. The programme comprised 26 lectures, each of 90 minutes, and 13 hours of case study. The students were given homework each day and had an opportunity to sit a final exam, which counted towards university credit. Feedback from the participants was extremely positive, praising the expertise and enthusiasm of the lecturers, as well as the high standard and quality of their lectures. Initial dis...

  17. A joint venturer perspective

    International Nuclear Information System (INIS)

    Many joint ventures are facing potentially huge and usually unquantifiable prospective liabilities as a consequence of the abandonment of energy and resource projects and associated reclamation obligations. It is possible for abandonment costs to be met at least partly by government or collective industry actions. There is, however, a realization amongst joint venturers that where such action has not been taken they need to enter into arrangements amongst themselves. The circumstances under which such security arrangements should be entered into and the form they should take are discussed. Aspects of security provision such as transfer of interest in the project, failure of a participant to provide the security when due and how long security agreements should continue, are also considered. (UK)

  18. Joint hypermobility syndrome pain.

    Science.gov (United States)

    Grahame, Rodney

    2009-12-01

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

  19. Posttraumatic Temporomandibular Joint Disorders

    OpenAIRE

    Giannakopoulos, Helen E.; Quinn, Peter D.; Granquist, Eric; Chou, Joli C.

    2009-01-01

    The temporomandibular joint (TMJ) has many essential functions. None of its components are exempt from injury. Facial asymmetry, malocclusion, disturbances in growth, osteoarthritis, and ankylosis can manifest as complications from trauma to the TMJ. The goals of initial treatment include achievement of pretraumatic function, restoration of facial symmetry, and resolution of pain. These same objectives hold true for late repairs and reconstruction of the TMJ apparatus. Treatment is demanding,...

  20. Jet Joint Undertaking

    International Nuclear Information System (INIS)

    The paper presents the Jet Joint Undertaking annual report 1987. A description is given of the JET and Euratom and International Fusion Programmes. The technical status of JET is outlined, including the development and improvements made to the system in 1987. The results of JET Operation in 1987 are described within the areas of: density effects, temperature improvements, energy confinement studies and other material effects. The contents also contain a summary of the future programme of JET. (U.K.)

  1. Responsibility and joint production

    OpenAIRE

    Petersen, Thomas; Faber, Malte

    2004-01-01

    In this paper, we discuss the relationship between responsibility and joint production. Responsibility mirrors our ability to act freely. We can act freely only if we can assume responsibility for our actions and their consequences; the limits of our responsibility are therefore also the limits of our liberty (part I). Thus, a problem of responsibility arises from our partial ignorance with respect to the consequences which our actions entail. Since this ignorance is at least partly irreducib...

  2. On joint numerical radius

    Czech Academy of Sciences Publication Activity Database

    Müller, Vladimír

    2014-01-01

    Roč. 142, č. 4 (2014), s. 1371-1380. ISSN 0002-9939 R&D Projects: GA ČR GA201/09/0473; GA AV ČR IAA100190903 Institutional support: RVO:67985840 Keywords : joint numerical range * numerical radius Subject RIV: BA - General Mathematics Impact factor: 0.681, year: 2014 http://www.ams.org/journals/proc/2014-142-04/S0002-9939-2014-11876-4/ home .html

  3. Nanotechnology in joint replacement

    OpenAIRE

    Torrecillas, Ramón; J. S. MOYA; Díaz, L. A.; Bartolomé, J. F.; Fernández, Adolfo; Lopez-Esteban, S.

    2009-01-01

    This paper reviews the most relevant achievements and new developments in the field of nanomaterials and their possible impact on the fabrication of a new generation of reliable and longer lasting implants for joint replacement. Special emphasis is given to the role of nanocomposites with different microstructural designs: micro-nano composites, nano-nano composites, macro-micro-nano composites as well as bioinspired hierarchical composite materials. These nanostructured materials have opened...

  4. Prosthetic elbow joint

    Science.gov (United States)

    Weddendorf, Bruce C. (Inventor)

    1994-01-01

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

  5. The Joint Cities

    Directory of Open Access Journals (Sweden)

    Romano Fistola

    2010-04-01

    Full Text Available The new connections, which high speed train allows to activate among the metropolitan systems, seem to be able to give life to new urban macro-structures for which the transfer time, among the main poles of the railway segment, becomes comparable to an inside moving into the city and therefore considered as an inter-functional mobility. The tunnel effect generated by the high speed connection seems to be able to allow a new temporal and functional joint among the metropolitan systems consequently supporting the possibility, for the users, to move themselves among the different urban functions belonging to the different cities. The birth of these urban aggregations seems to drive towards new megalopolis, which we can define for the first time with the term: joint-city. For this new metropolitan settlement it seems to be very interesting to investigate the constitutive peculiarities, the systemic articulation, its relational structures, the evolutionary scenarios, and so on. The urban functions (activities can be considered as structures of relationships between people that allows to define "organizational links" inside the community; the urban functions are located in specific places inside urban container or in open spaces. The urban functions represent the urban engines and the functional system can be thought as the “soul of the city", abstract but essential to its survival. In the definition set out here the analysis is carried out for many interconnected urban functional system points (specifically those in Rome and Naples. The new high speed railway has to be considered not only as a new channel of mobility between cities, but as a real possibility of joint between the functional systems of the two centres. A final consideration can be carried out in relation to the possibility of implementing new measures of governance of urban transformations considering the new macro-city: the "Joint City".

  6. Shoulder joint tuberculosis

    International Nuclear Information System (INIS)

    Despite the fact that joint tuberculosis is one of the most common forms of extrapulmonary tuberculosis, it is a disease entity that is very rare in Poland (less than 100 cases a year in the last 10 years). The symptoms are non-specific, and thus the disease is rarely taken into account in preliminary differential diagnosis. A 68-year-old female patient was admitted to the Internal Diseases Clinic due to oedema and pain of the right shoulder joint. The pain has been increasing for about 8 months. Physical examination revealed increased circumference and elevated temperature of the right shoulder joint. Limb function was retained. The full range of radiological and laboratory diagnostic examinations was performed, including the biopsy of the affected tissue which revealed the presence of Mycobacterium tuberculosis in the bacterial culture. Clinical improvement was obtained after introduction of TB drugs. Radiological diagnostic methods (X-ray, CT scans, MRI scans) provide high precision monitoring of articular lesions. However, the decisive diagnosis requires additional laboratory tests as well as histopathological and bacteriological assays

  7. The neuropathic joint.

    Science.gov (United States)

    Sequeira, W

    1994-01-01

    Neuropathic arthritis is a destructive arthropathy frequently associated with loss of proprioception. A third of patients, however, may have no demonstrable neurological deficit. Patients with diabetes, syphilis, syringomyelia and other neuropathies are particularly prone to developing this joint disease. The diagnosis of Charcot's joints should be considered in anyone who develops what appears to be a severe osteoarthritis or a transverse fracture of the tibia or fibula after minor trauma. Scoliosis with particularly destructive changes on radiography should prompt a search for syringomyelia or syphilis. The most common radiographic abnormalities are those of distension in 3D (Dislocation, Destruction and Degeneration). An atrophic form with resorption of the proximal humerus, most frequently described in syringomyelia, has been observed in diabetes. Loss of the distal end of the clavicle has not been described before in the neuropathies. These changes coupled with speckled calcification or shards of bone in the periarticular soft tissue confirm the diagnosis. Infection and CPPD crystal disease can be difficult to exclude. The joint fluid may be inflammatory and infection may be a complication. Treatment includes anti-inflammatories and splinting. Indications for surgery are limited. PMID:8070170

  8. Formation of tough composite joints

    International Nuclear Information System (INIS)

    Joints which exhibit tough fracture behavior were formed in a composite with a Si/SiC matrix reinforced with Textron SCS-6 fibers with either boron nitride or silicon nitride fiber coatings. In composites with BN coatings fibers were aligned uniaxially, while composites with Si3N4-coated fibers had a 0/90 degree architecture. Lapped joints (joints with overlapping fingers) were necessary to obtain tough behavior. Geometrical requirements necessary to avoid brittle joint failure have been proposed. Joints with a simple overlap geometry (only a few fingers) would have to be very long in order to prevent brittle failure. Typical failure in these joints is caused by a crack propagating along the interfaces between the joint fingers. Joints of the same overall length, but with geometry changed to be symmetric about the joint centerline and with an extra shear surface exhibited tough fractures accompanied with extensive fiber pullout. The initial matrix cracking of these joints was relatively low because cracks propagated easily through the ends of the fingers. Joints with an optimized stepped sawtooth geometry produced composite-like failures with the stress/strain curves containing an elastic region followed by a region of rising stress with an increase of strain. Increasing the fiber/matrix interfacial strength from 9 to 25 MPa, by changing the fiber coating, increased matrix cracking and ultimate strength of the composite significantly. The best joints had matrix cracking stress and ultimate strength of 138 and 240 MPa, respectively. Joint failure was preceded by multiple matrix cracking in the entire composite. The high strength of the joints will permit building of structures containing joints with only a minor reduction of design stresses

  9. Formation of tough composite joints

    Energy Technology Data Exchange (ETDEWEB)

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

    1997-05-01

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

  10. Laboratory characterization of rock joints

    International Nuclear Information System (INIS)

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

  11. Laboratory characterization of rock joints

    Energy Technology Data Exchange (ETDEWEB)

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

    1994-05-01

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

  12. Posttraumatic temporomandibular joint disorders.

    Science.gov (United States)

    Giannakopoulos, Helen E; Quinn, Peter D; Granquist, Eric; Chou, Joli C

    2009-05-01

    The temporomandibular joint (TMJ) has many essential functions. None of its components are exempt from injury. Facial asymmetry, malocclusion, disturbances in growth, osteoarthritis, and ankylosis can manifest as complications from trauma to the TMJ. The goals of initial treatment include achievement of pretraumatic function, restoration of facial symmetry, and resolution of pain. These same objectives hold true for late repairs and reconstruction of the TMJ apparatus. Treatment is demanding, and with opposing approaches. The following article explores various treatment options for problems presenting as a result of a history of trauma to the TMJ. PMID:22110802

  13. Joint Advisory Appeals Board

    CERN Document Server

    HR Department

    2006-01-01

    The Joint Advisory Appeals Board was convened to examine an appeal lodged by a member of the personnel with regard to advancement. The person concerned has requested that the report of the Board and the final decision of the Director-General be brought to the notice of the personnel in accordance with Article R VI 1.20 of the Staff Regulations. The relevant documents will therefore be posted on the notice boards of the Administration Building (No. 60) from 24 March to 10 April 2006. Human Resources Department Tel. 74128

  14. Joint Advisory Appeals Board

    CERN Multimedia

    2003-01-01

    The Joint Advisory Appeals Board was convened to examine the appeal lodged by Mrs Judith Igo-Kemenes concerning the application of procedures foreseen by Administrative Circular N§ 26 (Rev. 3). As the appellant has not objected, the report of the Board and the final decision of the Director-General are brought to the notice of the personnel in accordance with Article R VI 1.20 of the Staff Regulations. The relevant documents will therefore be posted on the notice boards of the Administration Building (N° 60) from 6 to 20 June 2003. Human Resources Division Tel. 74128

  15. THE JOINT MONITORING COMMISSION

    Directory of Open Access Journals (Sweden)

    Helmoed-Römer Heitman

    2012-02-01

    Full Text Available The Joint Monitoring Commission (JMC was created to oversee the withdrawal of South African forces from the portion of Angola's southern Cunene province in which they had operated for some time, and its re-occupation by the Angolan Armed Forces (Fapla. It was to ensure that neither Swapo nor Cuban forces moved into this area as the South African Defence Force (SADF withdrew. The JMC consisted of SADF and Fapla headquarters (HQ personnel and infantry from both armies to monitor the area concerned. It operated in southern Angola from February 1984 to May 1985.

  16. Ulnar joint synovial sarcoma

    International Nuclear Information System (INIS)

    Statement of the diagnosis of synovial sarcoma in early period on the example of one patient is analyzed. It is too difficult to diagnose synovial sarcoma. Comprehensive X-ray ultrasonic examination is the most informative in detection of tumor. Surgical removal of revealed formation has been conducted to the patient. The formation is dense, joined to muscular fibers, is not connected with the joint. Histological investigation of the formation determines dissemination of malignant tumor, presented by round or oval cells. Tumor tissue is devided by thick fibrous layers, surrounded by fibrous capsula. The following conclusion is given: synovial sarcoma

  17. Tarsometatarsal/Lisfranc joint.

    Science.gov (United States)

    DiDomenico, Lawrence A; Cross, Davi

    2012-04-01

    Accurate early diagnosis with adequate reduction and maintenance of anatomic alignment of the dislocation or fracture within the Lisfranc joint complex have been found to be the key to successful outcomes regarding this injury. Because of the anatomic variations, the thin soft tissue envelop, and the abundance of ligamentous and capsular structures in the region, repair of these injuries can be a challenge. The classification systems used to describe these injuries aid in describing the mechanism of injury or displacement type present, which may aid in determining what treatment modality can provide the best outcome. PMID:22424486

  18. Joint Advisory Appeals Board

    CERN Multimedia

    2003-01-01

    The Joint Advisory Appeals Board was convened to examine the appeal lodged by Mr Poul Frandsen concerning his assimilation into the new career structure. As the appellant has not objected, the report of the Board and the final decision of the Director-General are brought to the notice of the personnel in accordance with Article R VI 1.20 of the Staff Regulations. The relevant documents will therefore be posted on the notice boards of the Administration Building (N° 60) from 13 to 24 January 2003. Human Resources Division Tel. 74128

  19. Embrittlement of welded joints

    International Nuclear Information System (INIS)

    The structure of a weld is considered and the role of the main parts of a welded joint in the appearance of defects during welding is determined. Factors greatly affecting hot crack formation (heat removal, impurity redistribution, volume of welding bath, welding rate) are shown. Reasons for the appearance of cracks not related to crystallization process (subsequent heat treatment, plastic working, etc.) are analyzed. The process of cold cracking of welds due to hydrogen absorption and relaxation of high welding stresses, is investigated. Methods to avoid cold cracking are described. Mechanisms of weld embrittlement are considered using as examples steels and high nickel alloys. 248 refs.; 28 figs.; 2 tabs

  20. Joint Advisory Appeals Board

    CERN Document Server

    2013-01-01

    The Joint Advisory Appeals Board has examined the internal appeal lodged by a former member of the personnel, a beneficiary of the CERN Pension Fund, against the calculation of his pension in the framework of the Progressive Retirement Programme.   The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the attention of the members of the personnel. In application of Article R VI 1.18 of the Staff Regulations, these documents will therefore be available from 26 July to 11 August 2013 at the following link. HR Department Head Office

  1. Optical rotary joint

    Science.gov (United States)

    May, R. G., Jr.

    1982-06-01

    The primary objective of this contract is the design, fabrication, and testing of an optical rotary joint which permits transmission of signals through optical fibers across the interface of two environments rotating relative to each other. Outstanding optical performance is achieved through the use of gradient index lenses to couple radiation across the separation between two fibers. The salient features of this device are bidirectional operation at two wavelengths (850 nm and 1300 nm), low insertion loss, low rotationally induced variation of attenuation, a seven-circuit electrical slip-ring assembly, and rugged construction. The device is designed to facilitate the application of future designs to pressurized, subsea environments.

  2. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2008-01-01

    The Joint Advisory Appeals Board has examined the internal appeal lodged by a member of the personnel against the decision to grant him only a periodic one-step advancement for the 2006 reference year. The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the attention of the members of the personnel. In application of Article R VI 1.18 of the Staff Regulations, these documents will therefore be posted on the notice board of the Main building (bldg. 500) from 1 September to 14 September 2008. Human Resources Department (73911)

  3. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2008-01-01

    The Joint Advisory Appeals Board has examined the internal appeal lodged by a member of the personnel against the decision to grant him only a periodic one-step advancement for the 2006 reference year. The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the attention of the members of the personnel. In application of Article R VI 1.18 of the Staff Regulations, these documents will therefore be posted on the notice board of the Main Building (Bldg. 500) from 1 September to 14 September 2008. Human Resources Department (73911)

  4. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2007-01-01

    The Joint Advisory Appeals Board was convened to examine an internal appeal lodged by a member of the personnel with regard to the decision not to grant him an indefinite contract. The person concerned has requested that the report of the Board and the final decision of the Director-General be brought to the notice of the members of the personnel, in accordance with Article R VI 1.18 of the Staff Regulations. The relevant documents will therefore be posted on the notice board of the Main building (Bldg. 60) from 24 September to 7 October 2007. Human Resources Department

  5. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2008-01-01

    The Joint Advisory Appeals Board has examined the internal appeal lodged by a member of the personnel with regard to the decision not to award him a periodic one-step advancement for the 2006 reference year. The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the notice of the members of the personnel. In application of Article R VI 1.18 of the Staff Regulations, these documents will therefore be posted on the notice board of the Main building (Bldg. 500) from 17 March to 30 March 2008. Human Resources Department Tel. 73911

  6. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2008-01-01

    The Joint Advisory Appeals Board has examined the internal appeal lodged by a member of the personnel with regard to the decision not to grant him an indefinite contract. The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the notice of the members of the personnel. In application of Article R VI 1.18 of the Staff Regulations, these documents will therefore be posted on the notice board of the Main Building (Bldg. 500) from 26 May to 6 June 2008. Human Resources Department (73911)

  7. Joint Advisory Appeals Board

    CERN Multimedia

    HR Department

    2008-01-01

    The Joint Advisory Appeals Board was convened to examine an internal appeal lodged by a member of the personnel with regard to the decision not to grant him an indefinite contract. The person concerned has not objected to the report of the Board and the final decision of the Director-General being brought to the notice of the members of the personnel, in accordance with Article R VI 1.18 of the Staff Regulations. These documents will therefore be posted on the notice board of the Main Building (Bldg. 60) from 21 January to 3 February 2008. Human Resources Department (73911)

  8. Joint Advisory Appeals Board

    CERN Multimedia

    2003-01-01

    The Joint Advisory Appeals Board was convened to examine the appeal lodged by Mr Aloïs Girardoz with regard to classification and advancement. As the appellant has not objected, the Board's report and the Director-General's decision will be brought to the notice of the personnel in accordance with Article R VI 1.20 of the Staff Regulations. The relevant documents will therefore be posted on the notice boards of the Administration Building (N° 60) from 15 to 29 August 2003. Human Resources Division Tel. 74128

  9. Lisfranc Joint Injuries

    Institute of Scientific and Technical Information of China (English)

    Lisa Chinn

    2009-01-01

    @@ The ankle and foot are the most common sites for athletic injuries.[1]Midfoot,or Lisfranc,injuries are the second most common foot injury and have a high in cidence in particular sports.They account for 4% of all football injuries per year,occurring frequently in linemen.[2]They are also common in equestrians,surfers,and windsurfers.[2]Lisfranc injuries are often misdiagnosed and if not treated properly can have lingering symptoms.It is estimated that Lisfranc joint injuries occur in 1 in every 55,000 persons every year.[3,4

  10. Joint-sparing Corrections in Malunited Lisfranc Joint Injuries.

    Science.gov (United States)

    Nery, Caio; Raduan, Fernando; Baumfeld, Daniel

    2016-03-01

    Lisfranc fracture-dislocations are very serious and potentially disabling injuries. Unfortunately, they are often misdiagnosed. Multiplanar midfoot deformities that result from these fracture-dislocations are precursors of joint degeneration and significant functional disabilities. Anatomic reduction with different types of internal fixation is an efficient method to reconstruct midfoot alignment and stability. Joint-preserving reconstruction techniques emerge as a viable alternative to corrective fusion as they achieve stable joint realignment with preserved motion. PMID:26915786

  11. Jointly Sponsored Research Program

    Energy Technology Data Exchange (ETDEWEB)

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

    2009-03-31

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

  12. Ball-joint grounding ring

    Science.gov (United States)

    Aperlo, P. J. A.; Buck, P. A.; Weldon, V. A.

    1981-01-01

    In ball and socket joint where electrical insulator such as polytetrafluoroethylene is used as line to minimize friction, good electrical contact across joint may be needed for lightning protection or to prevent static-charge build-up. Electrical contact is maintained by ring of spring-loaded fingers mounted in socket. It may be useful in industry for cranes, trailers, and other applications requiring ball and socket joint.

  13. Goniometry in limited joint mobility

    OpenAIRE

    Gopinath, S.; Manoj, K.; Rubiya

    2012-01-01

    Aim: To study about the utility of goniometry in screening for limited joint mobility (LJM) in patients attending a secondary level Diabetic Clinic. Materials and Methods: Randomly selected data of 100 patients attending a secondary level diabetic clinic without any complications were used. Baseline neuropathy assessments, namely monofilament and biothesiometry were done. Range of movement around the ankle joint and 1 st metatarsal joint was done using goniometry. Both the results were compar...

  14. The Challenges of Joint Attention

    OpenAIRE

    Kaplan, Frederic; Hafner, Verena

    2004-01-01

    This paper discusses the concept of joint attention and the different skills underlying its development. We argue that joint attention is much more than gaze following or simultaneous looking because it implies a shared intentional relation to the world. The current state-of-the-art in robotic and computational models of the different prerequisites of joint attention is discussed in relation with a developmental timeline drawn from results in child studies.

  15. Joint audits - benefit or burden?

    DEFF Research Database (Denmark)

    Holm, Claus; Thinggaard, Frank

    audits to be a net burden. Furthermore, based on DeAngelo's (1981) initial audit pricing model and legislators' claim that joint audits are an unnecessary economic burden to the companies we predict and find discounts (of around 25%) in audit fees in companies that change to single audits. The primary...... joint audit regime to a single auditor/voluntary joint audit regime. The dataset used in this paper has been collected for the full population of non-financial Danish companies listed on the Copenhagen Stock Exchange (CSE) in the years 2004 and 2005. We find that a majority of firms perceive joint...

  16. Index of Joint Condition for PVC push-fit joints

    NARCIS (Netherlands)

    Arsenio, A.M.; Vreeburg, J.H.G.; Rietveld, L.

    2014-01-01

    The Index of Joint Condition (IJC) for polyvinyl chloride (PVC) push-fit joints, discussed in this article, was derived from installation guidelines and from destructive laboratory tests. The IJC is presented in a graphical framework and is a powerful tool to employ in order to visualize and compare

  17. TEMPOROMANDIBULAR-JOINT OSTEOARTHROSIS AND GENERALIZED JOINT HYPERMOBILITY

    NARCIS (Netherlands)

    DIJKSTRA, PU; DEBONT, LGM; STEGENGA, B; BOERING, G

    1992-01-01

    Peripheral joint mobility of temporomandibular joint (TMJ) osteoarthrosis and internal derangement patients (n = 25) and of a control group (n = 29) was measured according to a rigidly standardized protocol, in order to study the relationships between TMJ osteoarthrosis and internal derangement and

  18. Temporomandibular joint arthrography

    International Nuclear Information System (INIS)

    The stress and occlusion disturbance are very important etiologic factors in the temporomandibular joint (TMJ) pain dysfunction syndromes. Authors performed TMJ arthrograms in the patients with TMJ problem such as pain, click sound, limited motion and locking, etc. The following results noted: 1. The arthrographic findings of 22 TMJ were analyzed. a) Normal: 6 cases b) Anterior disc displacement with rediction: 6 cases · Early reduction: 2 cases · Intermediate reduction: 3 cases · Late reduction: 1 case c) Anterior disc displacement without reduction: 6 cases · Two cases had adhesion between the posterior portion of disc and the posterior surfaces of the articular eminence. 2. Among 22 cases, the clinical findings of 16 cases (73%) were compatible with arthrographic findings. 6 cases showed disparity between them.

  19. Vertebral spinal osteophytes.

    Science.gov (United States)

    Klaassen, Zachary; Tubbs, R Shane; Apaydin, Nihal; Hage, Robert; Jordan, Robert; Loukas, Marios

    2011-03-01

    Osteoarthritis is a common complication in the elderly and is often associated with osteophyte growth on vertebral bodies. The clinical presentation of vertebral osteophytes is related to anatomical structures adjacent to the spinal column. For instance, cervical osteophytes potentially involve the pharynx and esophagus, leading to dysphagic symptoms that may be accompanied by food aspiration, vocal fold paralysis and obstructive sleep apnea. In addition to anterior cervical osteophytes, posterior and uncinate process osteophytes may form, compressing the spinal cord and vertebral artery blood supply, respectively. Cervical osteophytes have also been shown to form an accessory median atlanto-occipital joint when the relationship between the atlas, dens and basiocciput is involved. In the thorax, the esophagus is often affected by osteophytes and may result in dysphagia. Traumatic and non-traumatic thoracic aorta pseudoaneurysm formation has been attributed to sharp osteophytes lacerating the aorta, a direct complication of the relationship between the aorta anterior vertebral column. Additionally, aspiration pneumonia was reported in patients with compression of a main stem bronchus, due to mechanical compression by thoracic osteophytes. In the lumbar spinal region, the two major structures in close proximity to the spine are the inferior vena cava and abdominal aorta, both of which have been reported to be affected by osteophytes. Treatment of osteophytes is initially conservative with anti-inflammatory medications, followed by surgical removal. Increasing obesity and geriatric populations will continue to result in an array of osteoarthritic degenerative changes such as osteophyte formation. PMID:20383671

  20. Endotracheal tube displacement during cervical manipulation in the dog

    International Nuclear Information System (INIS)

    A retrospective study was performed to identify positional changes of endotracheal tubes (ETT) during cervical spine radiography in 153 dogs. Three neck positions were identified: traction, hyperextension, and flexion. A properly placed ETT was defined as having the caudal tip of the tube located between the caudal half of the fourth cervical (C) vertebra (C4) and the caudal half of C7. In the traction position, before neck flexion and extension, the caudal tip of 13% of ETT were located caudal to C7, and one tube was in the endobronchial position at the seventh thoracic (T) vertebra (T7). In the hyperextended position, 60% of ETT moved cranially. The average distance moved was 0.6 vertebral spaces. In the flexed position, all ETT moved caudally. The average distance moved was 3.5 vertebral spaces, with 81.8% of ETT located caudal to C7 and seven tubes in endobronchial positions. Endotracheal tube occlusion caused by kinking at the atlanto-occipital joint was seen in four dogs during flexion of the neck. Based on this study, ETT position should be monitored during cervical manipulation

  1. Saving Joint with Aerosol physics

    International Nuclear Information System (INIS)

    Full text: Using electro spray method to analyze wear debris from artificial joints. Well known aerosol techniques have been applied to determine the size distribution and concentration of wear particles found in joint fluids. The organic fraction (cells and large molecules) are removed by digestion. Knowing these data the risk of clogging of blood vessels can be medicinally reduced. (author)

  2. Exercise and the Knee Joint.

    Science.gov (United States)

    Clarke, H. Harrison, Ed.

    1976-01-01

    This report by the President's Council on Physical Fitness and Sports examines the effects of various forms of physical exercise on the knee joint which, because of its vulnerability, is especially subject to injury. Discussion centers around the physical characteristics of the joint, commonly used measurements for determining knee stability,…

  3. Joint mathematical weekend in Copenhagen

    DEFF Research Database (Denmark)

    Raussen, Martin

    2008-01-01

    Notes from the 2008 joint mathematical weekend (29.02-02.03.2008) organized by the Danish Mathematical Society......Notes from the 2008 joint mathematical weekend (29.02-02.03.2008) organized by the Danish Mathematical Society...

  4. MRI of the Temporomandibular Joint

    Directory of Open Access Journals (Sweden)

    Hashem Sharifian

    2010-05-01

    Full Text Available Before recent advances in the last three decades, evaluation of the temporomandiular joint (TMJ was primarily done by plain radiography and arthrography."nCT scan adds more detail in the study of articular surfaces and anatomy of the joint. However, no direct vision upon delicate structures of the joint was available."nMRI has changed this point of view by high contrast resolution of soft tissues."nNevertheless, various pulse sequences and imaging techniques in this modality, cause some controversy and confusion about the best technique for detection of anatomy of the joint and its different pathologic conditions."nAfter a concise review of the anatomy and defining various techniques, our scope is to verify which of these pulse sequences can better delineate joint structures and disorders.

  5. Induction brazing of complex joints

    DEFF Research Database (Denmark)

    Henningsen, Poul; Zhang, Wenqi; Bay, Niels

    2003-01-01

    Induction brazing is a fast and appropriate method for industrial joining of complex geometries and metal combinations. In all types of brazing processes it is important to heat the joint interface of the two materials to the same, high temperature. If one of the specimens is warmer than the other......, or if the hottest area is located outside the joint interface, a number of defects may appear: the braze metal may flow away from the joint, the flux may burn off, poor binding of the braze metal may appear or the braze metal may be overheated. Joint geometry as well as electro-magnetic properties of...... the work piece materials has large influence on the heating time and temperature distribution in induction heating. In order to ensure high and uniform temperature distribution near the interface of a joint between dissimilar materials the precise coil geometry and position is of great importance. The...

  6. Space Station alpha joint bearing

    Science.gov (United States)

    Everman, Michael R.; Jones, P. Alan; Spencer, Porter A.

    1987-01-01

    Perhaps the most critical structural system aboard the Space Station is the Solar Alpha Rotary Joint which helps align the power generation system with the sun. The joint must provide structural support and controlled rotation to the outboard transverse booms as well as power and data transfer across the joint. The Solar Alpha Rotary Joint is composed of two transition sections and an integral, large diameter bearing. Alpha joint bearing design presents a particularly interesting problem because of its large size and need for high reliability, stiffness, and on orbit maintability. The discrete roller bearing developed is a novel refinement to cam follower technology. It offers thermal compensation and ease of on-orbit maintenance that are not found in conventional rolling element bearings. How the bearing design evolved is summarized. Driving requirements are reviewed, alternative concepts assessed, and the selected design is described.

  7. General joint hypermobility and temporomandibular joint derangement in adolescents.

    OpenAIRE

    Westling, L; Mattiasson, A.

    1992-01-01

    Joint mobility was assessed in each member of an epidemiological sample of 96 girls and 97 boys, 17 years old, and graded by means of the hypermobility score of Beighton et al. Twenty two per cent of the girls and 3% of the boys could perform five or more of the nine manoeuvres. The prevalence of symptoms and signs of internal derangement in the temporomandibular joint was higher in adolescents with hypermobility of joints (score greater than or equal to 5/9). In subjects with a high mobility...

  8. Joint seal in tank

    International Nuclear Information System (INIS)

    A seal for a joint or gap between edges of adjacent wall sections (e.g. of concrete) of a liquid-containing vessel, such as a nuclear reactor cooling pond, comprises a sheet metal strip having longitudinally-extending edge parts, secured to the respective vessel-section edges, and a central part which is longitudinally corrugated to provide sufficient flexibility to accommodate slight relative movements between the vessel-section edges (e.g. due to thermal expansions). The edges of the sheet metal of the strip are turned in so that the edge parts of the strip are formed as generally U-section channels. These accommodate longitudinally extending securing bars which are bolted to the vessel wall sections by bolts which pass through the bars, through the free-edged wall of the channel section and through a longitudinally extending resilient seal pad compressed between that wall of the channel section and the vessel wall section to which it is secured. The other wall of the channel section (integral with the corrugated central part of the strip) has access windows through which the bolts are inserted and tightened, the windows being then closed off in liquid-tight manner by welding closure caps over them. (author)

  9. TEMPOROMANDIBULAR-JOINT OSTEOARTHROSIS AND TEMPOROMANDIBULAR-JOINT HYPERMOBILITY

    NARCIS (Netherlands)

    DIJKSTRA, PU; DEBONT, LGM; DELEEUW, R; STEGENGA, B; BOERING, G

    1993-01-01

    For studying the relationship between condylar hypermobility of the temporomandibular joint (TMJ) and osteoarthrosis (OA), 13 patients with bilateral condylar hypermobility were evaluated clinically and radiographically, 30 years after non-surgical treatment. The evaluation included range of motion,

  10. Osteoarthritis of the Wrist STT Joint and Radiocarpal Joint

    OpenAIRE

    Ronit Wollstein; Julio Clavijo; Gilula, Louis A.

    2012-01-01

    Our understanding of wrist osteoarthritis (OA) lags behind that of other joints, possibly due to the complexity of wrist biomechanics and the importance of ligamentous forces in the function of the wrist. Scaphotrapeziotrapezoidal (STT) OA is common, but its role in wrist clinical pathology and biomechanics is unclear. We identified the prevalence of radiographic STT joint OA in our hand clinic population and defined the relationship between STT and radiocarpal OA in wrist radiographs. One hu...

  11. Finishing touch to joint venture

    CERN Multimedia

    2003-01-01

    "A new process for polishing titanium and its alloys has been announced following an agreement between Bripol (an Anopol/Delmet joint venture) of Birmingham and the European Organisation for Nuclear Reseach (CERN) in Geneva" (1 paragraph).

  12. Practical aspects of joint implementation

    International Nuclear Information System (INIS)

    Article 4, 2a of the UN Framework Convention on Climate Change states the possibility of joint policies of different countries to achieve national greenhouse gas reduction commitments (Joint Implementation). The cost of reducing greenhouse gas emissions can be reduced drastically if industrialized countries shift abatement activities to developing countries as marginal cost of reduction is much higher in the former countries. In this way economic efficiency of abatement measures can be raised to the point where marginal cost is equal all over the world. At the Conference of the Parties in Berlin in March 1995, criteria for Joint Implementation are to be established. The paper discusses possible forms of Joint Implementation and develops criteria

  13. MRI of the hip joint

    International Nuclear Information System (INIS)

    Magnetic resonance imaging (MRI) is performed to diagnose many pathologic conditions affecting the hip joint. Either conventional MRI (without contrast enhancement of the joint cavity) or MR arthrography is used to detect and most accurately differentiate hip joint pathologies. Conventional MRI is performed in cases of bone marrow edema, necrosis, arthrosis and especially the so-called ''activated arthrosis'', as well as in inflammatory and tumorous entities. MR arthography, which has only recently become available for use, is excellently suited for diagnosing lesions of the acetabular labrum, cartilage lesions, and free articular bodies. This article provides an overview about MRI characteristics and their accuracy of hip joint diseases and the impact on the therapeutic procedure. (orig.)

  14. US Joint Ventures 2014 revision

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — A joint venture is a self-directed partnership of agencies, organizations, corporations, tribes, or individuals that has formally accepted the responsibility of...

  15. Joint Performance and Planning System

    Data.gov (United States)

    US Agency for International Development — A joint State/USAID system hosted by State that integrates resource and performance information at the program level and enables more flexible and frequent entry of...

  16. Irradiation stability of welded joints

    International Nuclear Information System (INIS)

    Results are presented of investigations into the neutron irradiation stability of welded joints in two types of steel used for reactor pressure vessels. Details are given of the materials used, method of welding and tests applied. The effect of irradiation on the notch toughness transition curve is shown. The results of the studies into irradiation embrittlement of all the welded joints and parent materials of the steels for the pressure vessels are summarized. (U.K.)

  17. Shell Joint Venture IT Framework

    OpenAIRE

    Evert Ruijs

    2013-01-01

    Dit artikel is alleen beschikbaar in het Nederlands. Shell's wereldwijde productie van olie en gas gaat voor een groot deel via Joint Ventures. Deze Joint Ventures werken in meer of mindere mate onder het management van Shell, vaak optioneel gebruik makend van Shell's processen, standaarden, gemeenschappelijke portfolio van applicaties en technologie. Om de vele soorten van applicaties en versies van implementaties beheersbaar te houden in de 'extended enterprise' is een goed raamwerk nodig. ...

  18. Joint between metals and PTFE

    International Nuclear Information System (INIS)

    Requirements to join dissimilar materials are more frequent in new technologies. The paper deals with a study of a joint between aluminium pieces and PTFE (teflon) pieces. The way of their joining is described. The joint was performed by soldering with adhesive 'x60', that covered the joining surfaces of the pieces, processed at a certain roughness, in a well established thickness layer. Initially, the surface of PTFE pieces were covered with a thin and uniform sodium metal sheet. The joint was realized by a particular procedure of soldering, simultaneously with plastic deformation of the metal. Various tests of the joint were carried out under conditions simulating service conditions. A piece joint was tested for its strength, thermal resistance and tightness. The tests showed a very good tightness of the joint at high vacuum (10-9 torr), in conditions of repeated thermic shocks, for temperature range within 73 K and 543 K. It was also study the interfaces between metal and PTFE. The study took into account the requirements of particular tests and relevant foreign standards, including ASTM and DIN. (authors)

  19. 12 CFR 347.107 - Joint ventures.

    Science.gov (United States)

    2010-01-01

    ... or holds an equity interest in a foreign organization that is a joint venture, and the bank or its... under § 347.105(b). (b) Joint venture defined. For purposes of this section, the term “joint venture... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Joint ventures. 347.107 Section 347.107...

  20. Management of acromioclavicular joint injuries.

    Science.gov (United States)

    Li, Xinning; Ma, Richard; Bedi, Asheesh; Dines, David M; Altchek, David W; Dines, Joshua S

    2014-01-01

    Acromioclavicular joint injuries are among the most common shoulder girdle injuries in athletes and most commonly result from a direct force to the acromion with the arm in an adducted position. Acromioclavicular joint injuries often present with associated injuries to the glenohumeral joint, including an increased incidence of superior labrum anterior posterior (SLAP) tears that may warrant further evaluation and treatment. Anteroposterior stability of the acromioclavicular joint is conferred by the capsule and acromioclavicular ligaments, of which the posterior and superior ligaments are the strongest. Superior-inferior stability is maintained by the coracoclavicular (conoid and trapezoid) ligaments. Type-I or type-II acromioclavicular joint injuries have been treated with sling immobilization, early shoulder motion, and physical therapy, with favorable outcomes. Return to activity can occur when normal shoulder motion and strength are obtained and the shoulder is asymptomatic as compared with the contralateral normal extremity. The management of type-III injuries remains controversial and is individualized. While a return to the previous level of functional activity with nonsurgical treatment has been documented in a number of case series, surgical reduction and coracoclavicular ligament reconstruction has been associated with a favorable outcome and can be considered in patients who place high functional demands on their shoulders or in athletes who participate in overhead sports. Surgical management is indicated for high-grade (≥type IV) acromioclavicular joint injuries to achieve anatomic reduction of the acromioclavicular joint, reconstruction of the coracoclavicular ligaments, and repair of the deltotrapezial fascia. Outcomes after surgical reconstruction of the coracoclavicular ligaments have been satisfactory with regard to achieving pain relief and return to functional activities, but further improvements in the biomechanical strength of these

  1. Migrating bone shards in dissecting Charcot joints.

    Science.gov (United States)

    Forrester, D M; Magre, G

    1978-06-01

    Extensive periarticular calcification is characteristic of Charcot joints. Fragmentation of the articular margins of bone contributes to the bony detritus, but the majority forms de novo in the joint capsule. Occasionally the calcific debris is seen far removed from the joint. Dissection of a chronically distended joint along muscle planes is most commonly associated with the inflammatory joint disease of rheumatoid arthritis. Its occurrence in Charcot joints is documented by arthrography, which demonstrates continuity of the joint space and the distant calcifications. PMID:418652

  2. Leaving a joint audit system

    DEFF Research Database (Denmark)

    Holm, Claus; Thinggaard, Frank

    2014-01-01

    Purpose: The authors aim to exploit a natural experment in which voluntary replace mandatory joint audits for Danish listed companies and analyse audit fee implications of using one or two audit firms. Design/methodology/approach: Regression analysis is used. The authors apply both a core audit fee...... determinants model and an audit fee change model and include interaction terms. Findings: The authors find short-term fee reductions in companies switching to single audits, but only where the former joint audit contained a dominant auditor. The authors argue that in this situation bargaining power is more...... with the auditors than in a equally shared joint audit, and that the auditors' incentives to offer an initial fee discount are bigger. Research limitations/implications: The number of observations is constrained by the small Danish capital market. Future research could take a more qualitative research...

  3. Goniometry in limited joint mobility

    Directory of Open Access Journals (Sweden)

    S Gopinath

    2012-01-01

    Full Text Available Aim: To study about the utility of goniometry in screening for limited joint mobility (LJM in patients attending a secondary level Diabetic Clinic. Materials and Methods: Randomly selected data of 100 patients attending a secondary level diabetic clinic without any complications were used. Baseline neuropathy assessments, namely monofilament and biothesiometry were done. Range of movement around the ankle joint and 1 st metatarsal joint was done using goniometry. Both the results were compared. Inclusion Criteria: Selected 100 patients attending a secondary level diabetic clinic and on regular follow-up were included in the study. Exclusion Criteria: Sick patients requiring parenteral feeds, IV antibiotics, co-morbid conditions such as microvascular complication, autonomic gastroparesis, and diabetic foot infections were excluded from the study. Conclusion: Goniometric screening for LJM is a cheap and effective screening tool for detecting early structural deformity producing a higher plantar pressure and ulcer, and thereby preventing them at early stage.

  4. Joint US/German Conference

    CERN Document Server

    Gulledge, Thomas; Jones, Albert

    1993-01-01

    This proceedings volume contains selected and refereed contributions that were presented at the conference on "Recent Developments and New Perspectives of Operations Research in the Area of Production Planning and Control" in Hagen/Germany, 25. - 26. June 1992. This conference was organized with the cooperation of the FernuniversiHit Hagen and was jointly hosted by the "Deutsche Gesellschaft fur Operations Research (DGOR)" and the "Manufacturing Special Interest Group of the Operations Research Society of America (ORSA-SIGMA)". For the organization of the conference we received generous financial support from the sponsors listed at the end of this volume. We wish to express our appreciation to all supporters for their contributions. This conference was the successor of the JOInt ORSA/DGOR-conference in Gaithersburg/Maryland, USA, on the 30. and 31. July 1991. Both OR-societies committed themselves in 1989 to host joint conferences on special topics of interest from the field of operations research. This goal ...

  5. Denervation of the wrist joint.

    Science.gov (United States)

    Buck-Gramcko, D

    1977-01-01

    A collective review was made of the results of denervation of the wrist joint for painful restrictiorn of motion done in 313 patients and follow-up studies on 195 (average 4.1 years, ranging from 9 months to 14 years). Complete denervation was done in only 30, partial denervation in the others being done after testing with local anesthetic blocks. Sixty-nine of the patients retained a moble wrist without pain or with slight pain with heavy work. No evidence of Charcot-like joints was seen. Poorest results followed when the operation was done for sequelae of intra-articular fracture of the radius, fracture dislocations, unstable ligamentous support, joint surface destruction, or for those required to do heavy manual labor. Arthrodesis was done secondarily in nine patients. PMID:839055

  6. Rheumatoid arthritis affecting temporomandibular joint

    Directory of Open Access Journals (Sweden)

    Amandeep Sodhi

    2015-01-01

    Full Text Available Rheumatoid arthritis (RA is a chronic, systemic, autoimmune inflammatory disorder that is characterized by joint inflammation, erosive properties and symmetric multiple joint involvement. Temporomandibular joint (TMJ is very rare to be affected in the early phase of the disease, thus posing diagnostic challenges for the dentist. Conventional radiographs fail to show the early lesions due to its limitations. More recently cone-beam computed tomography (CBCT has been found to diagnose the early degenerative changes of TMJ and hence aid in the diagnosis of the lesions more accurately. Our case highlights the involvement of TMJ in RA and the role of advanced imaging (CBCT in diagnosing the bony changes in the early phase of the disease.

  7. Torsion testing of bed joints

    DEFF Research Database (Denmark)

    Hansen, Klavs Feilberg; Pedersen, Carsten Mørk

    2008-01-01

    This paper describes a simple test method for determining the torsion strength of a single bed joint between two bricks and presents results from testing using this test method. The setup for the torsion test is well defined, require minimal preparation of the test specimen and the test can be...... carried out directly in a normal testing machine. The torsion strength is believed to be the most important parameter in out-of-plane resistance of masonry walls subjected to bending about an axis perpendicular to the bed joints. The paper also contains a few test results from bending of small walls about...... an axis perpendicular to the bed joints, which indicate the close connection between these results and results from torsion tests. These characteristics make the torsion strength well suited to act as substitute parameter for the bending strength of masonry about an axis perpendicular to the bed...

  8. Dual joint space arthrography in temporomandibular joint disorders: Comparison with single inferior joint space arthrography

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Hyung Sik; Chang, Duk Soo; Lee, Kyung Soo; Kim, Woo Sun; Sung, Jung Ho; Jun, Young Hwan [Capital Armed Forces General Hospital, Seoul (Korea, Republic of)

    1989-02-15

    The temporomandibular joint(TMJ) is really a complex of two synovial space separated by fibrocartilaginous disc. Single inferior joint space arthrography is commonly performed for evaluation of TMJ disorders, which is known to be superior in demonstrating joint dynamics. But it reveals only the inferior surface of the disc. Therefore, dual space arthrography is superior to demonstrate the soft tissue anatomic feature of the joint such as disc position and shape. Authors performed 83 TMJ arthrograms in TMJ problems. Initially, the inferior joint space was done and then the superior space was sequentially contrasted. The follow results were noted: 1. In all cases, dual space arthrography revealed accurate disc shape and positions. 2. Concordant findings between the two techniques: 68 cases (82%). Discordance between the two techniques: 15 cases (18%) 3. Possible causes of discordance between inferior and dual space arthrography. a) Normal varians of anterior recess: 3 cases b) Posterior disc displacement: 4 cases c) Influence of the patient's head position change :4 cases d) False perforation: 2 cases e) Reduction change: 2 cases 4. In 5 cases with anterior displacement, dual space arthrography gave additional findings such as adhesion within the superior space, which could not be evaluated by single inferior space.

  9. Dual joint space arthrography in temporomandibular joint disorders: Comparison with single inferior joint space arthrography

    International Nuclear Information System (INIS)

    The temporomandibular joint(TMJ) is really a complex of two synovial space separated by fibrocartilaginous disc. Single inferior joint space arthrography is commonly performed for evaluation of TMJ disorders, which is known to be superior in demonstrating joint dynamics. But it reveals only the inferior surface of the disc. Therefore, dual space arthrography is superior to demonstrate the soft tissue anatomic feature of the joint such as disc position and shape. Authors performed 83 TMJ arthrograms in TMJ problems. Initially, the inferior joint space was done and then the superior space was sequentially contrasted. The follow results were noted: 1. In all cases, dual space arthrography revealed accurate disc shape and positions. 2. Concordant findings between the two techniques: 68 cases (82%). Discordance between the two techniques: 15 cases (18%) 3. Possible causes of discordance between inferior and dual space arthrography. a) Normal varians of anterior recess: 3 cases b) Posterior disc displacement: 4 cases c) Influence of the patient's head position change :4 cases d) False perforation: 2 cases e) Reduction change: 2 cases 4. In 5 cases with anterior displacement, dual space arthrography gave additional findings such as adhesion within the superior space, which could not be evaluated by single inferior space

  10. Prosthesis of the wrist-joint

    Energy Technology Data Exchange (ETDEWEB)

    Feldmeier, C.

    1983-02-25

    Function of the hand-joint and the well-being of patients can be severely affected by arthrosis of the wrist-joint. Therapeutically, arthrodesis usually results in a painfree status of stiffness. A painless and well functioning joint can be achieved by alloplastic joint replacement or resurfacing. The possibilities and clinical results in cases of arthrosis of the carpo-metacarpal joint of the thumb, pseudarthrosis of the scaphoid, aseptic necrosis of the Lunate and severe arthrosis of the radio-carpal joint are demonstrated.

  11. Prosthesis of the wrist-joint

    International Nuclear Information System (INIS)

    Function of the hand-joint and the well-being of patients can be severely affected by arthrosis of the wrist-joint. Therapeutically, arthrodesis usually results in a painfree status of stiffness. A painless and well functioning joint can be achieved by alloplastic joint replacement or resurfacing. The possibilities and clinical results in cases of arthrosis of the carpo-metacarpal joint of the thumb, pseudarthrosis of the scaphoid, aseptic necrosis of the Lunate and severe arthrosis of the radio-carpal joint are demonstrated. (orig.)

  12. Complex motion tomography of the sacroiliac joint

    International Nuclear Information System (INIS)

    To find a better method for diagnosing sacroiliac (SI) joint disease, an anatomical approach was combined with conventional roentgenology, complex motion tomography and computed tomography. Complex motion tomography is suggested as the method of choice in the investigation of the SI-joint. Because of its complex (sinusoidal) form, the dorsal portion of the joint has to be tomographed in frontal projection and the middle and ventral portions in oblique projection. In 56 patients, referred for probable ankylosing spondylitis, 72 SI joints were investigated. Based on plain radiography six and on frontal tomography five SI joints were diagnosed as normal. However, based on oblique tomography 31 joints were diagnosed as normal. (orig.)

  13. What Determines Joint Venture Termination?

    DEFF Research Database (Denmark)

    Nielsen, Bo Bernhard

    2012-01-01

    Joint venture (JV) research continues to flourish as researchers seek to advance our understanding of why so many JVs fail. Cui and Kumar (this issue) take a contingency approach to explain how and why business relatedness may provide new insights as to what determines JV termination. This...

  14. Joint Attention and Anthropological Difference

    Czech Academy of Sciences Publication Activity Database

    Urban, Petr

    2014-01-01

    Roč. 11, č. 1 (2014), s. 59-70. ISSN 1718-0198 R&D Projects: GA ČR GAP401/10/1164 Institutional support: RVO:67985955 Keywords : joint attention * anthropological difference * phenomenology * great apes * shared intentionality Subject RIV: AA - Philosophy ; Religion

  15. Joint energy program makes progress

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ "Clean Energies Facing the Future," a cooperative research program jointly organized by CAS and the BP Group, has made encouraging progress, say experts at an annual sum-up workshop held on 31 July and I August at Tsinghua University in Beijing. The CAS Dalian Institute of Chemical Physics(DICP) has been entrusted as coordinator of the cooperative program between the two sides.

  16. Imaging of hip joint arthroplasty

    International Nuclear Information System (INIS)

    The hip joint is the largest joint in the human body and consequently, its evaluation by diagnostic imaging is highly important. This includes imaging of hip joint arthroplasty, which is used to avoid joint immobility following a wide spectrum of diseases, such as end-stage degenerative disease, avascular necrosis of the femoral head or post-traumatic fractures. Conventional radiography is still the standard imaging modality for the evaluation of hip arthroplasty both directly following surgery and for periodical follow-up. In the majority of cases conventional radiography enables adequate assessment of early and late complications that can arise following hip arthroplasty, such as loosening, prosthetic or periprosthetic fracture, luxation, infection and soft tissue calcification. If the diagnosis cannot be established by means of radiography, advanced imaging methods such as computed tomography (CT) and magnetic resonance imaging (MRI), with or without injection of contrast media, may provide additional information. This is particularly true for the depiction of inflammatory processes. Regardless of the imaging modality used patients' clinical symptoms must also be taken into account in order to establish the correct diagnosis. (orig.)

  17. Business process solution `Joint MEISTER`; Gyomu shien solution `Joint MEISTER`

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, Y.; Ito, S. [Fuji Electric Co. Ltd., Tokyo (Japan)

    1998-12-10

    The business process solution `Joint{sub M}EISTER` can be ranked among computer systems represented by groupware and WWW applications. This paper describes its typical system, ExchangeUSE work flow solution, and the effect of its introduction, citing a concrete case. The Company A introduced the ExchangeUSE work flow for traveling expenses adjustment and attendance, and has gained a reduction of 7 man-months/month. (author)

  18. Cancer of the Bone and Joint

    Science.gov (United States)

    ... a third party. HPF: SEER Stat Fact Sheets: Bone and Joint Cancer Expand All Collapse All Lifetime risk estimates are ... 5 Years Or More after Being Diagnosed with Bone and Joint Cancer? Relative survival statistics compare the survival of patients ...

  19. Improvements in or relating to pipe joints

    International Nuclear Information System (INIS)

    Pipe joints are described that are particularly suitable for liquid metal cooled nuclear reactors. The object is to provide a joint capable of accommodating movements resulting from differential expansion of the reactor components. Full constructional details are given. (UK)

  20. Seismic response of rock joints and jointed rock mass

    International Nuclear Information System (INIS)

    Long-term stability of emplacement drifts and potential near-field fluid flow resulting from coupled effects are among the concerns for safe disposal of high-level nuclear waste (HLW). A number of factors can induce drift instability or change the near-field flow patterns. Repetitive seismic loads from earthquakes and thermal loads generated by the decay of emplaced waste are two significant factors. One of two key technical uncertainties (KTU) that can potentially pose a high risk of noncompliance with the performance objectives of 10 CFR Part 60 is the prediction of thermal-mechanical (including repetitive seismic load) effects on stability of emplacement drifts and the engineered barrier system. The second KTU of concern is the prediction of thermal-mechanical-hydrological (including repetitive seismic load) effects on the host rock surrounding the engineered barrier system. The Rock Mechanics research project being conducted at the Center for Nuclear Waste Regulatory Analyses (CNWRA) is intended to address certain specific technical issues associated with these two KTUs. This research project has two major components: (i) seismic response of rock joints and a jointed rock mass and (ii) coupled thermal-mechanical-hydrological (TMH) response of a jointed rock mass surrounding the engineered barrier system (EBS). This final report summarizes the research activities concerned with the repetitive seismic load aspect of both these KTUs

  1. Seismic response of rock joints and jointed rock mass

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-06-01

    Long-term stability of emplacement drifts and potential near-field fluid flow resulting from coupled effects are among the concerns for safe disposal of high-level nuclear waste (HLW). A number of factors can induce drift instability or change the near-field flow patterns. Repetitive seismic loads from earthquakes and thermal loads generated by the decay of emplaced waste are two significant factors. One of two key technical uncertainties (KTU) that can potentially pose a high risk of noncompliance with the performance objectives of 10 CFR Part 60 is the prediction of thermal-mechanical (including repetitive seismic load) effects on stability of emplacement drifts and the engineered barrier system. The second KTU of concern is the prediction of thermal-mechanical-hydrological (including repetitive seismic load) effects on the host rock surrounding the engineered barrier system. The Rock Mechanics research project being conducted at the Center for Nuclear Waste Regulatory Analyses (CNWRA) is intended to address certain specific technical issues associated with these two KTUs. This research project has two major components: (i) seismic response of rock joints and a jointed rock mass and (ii) coupled thermal-mechanical-hydrological (TMH) response of a jointed rock mass surrounding the engineered barrier system (EBS). This final report summarizes the research activities concerned with the repetitive seismic load aspect of both these KTUs.

  2. Snap Joint Technology for Composite Structures

    OpenAIRE

    ECT Team, Purdue

    2007-01-01

    The optimum composite joint design is the one capable of distributing stresses over a wide area rather than to concentrate them at a point. Adhesively bonded joints can satisfy these requirements, however, most of the adhesives are brittle, and brittle failure is unavoidable. This was the motivation of developing what is called the SNAP joint. The snap joint technology developed by W. Brandt Goldworthy & Associates, Inc. The concept is based on similar joining technology used for connecting w...

  3. Price elasticities, joint products, and international trade

    OpenAIRE

    Piggott, Nicholas E.; Wohlgenant, Michael K.

    2002-01-01

    This paper extends the basic results of Houck’s insight for derived demand elasticities for the case of joint products by allowing for the possibility of the joint and raw products being traded. Theoretical relationships between individual demands for a set of jointly-produced commodities that are traded and composite demand for the raw product from which the joint products originate are derived. It is shown that while the derived price elasticity of domestic demand retains the same form as H...

  4. Limited joint mobility in diabetes mellitus.

    OpenAIRE

    Campbell, R R; Hawkins, S.J.; Maddison, P J; Reckless, J P

    1985-01-01

    The relationship of limited joint mobility and finger joint contractures in diabetics to age of onset, duration, and control of diabetes has not been established. We measured the mobility of metacarpophalangeal, wrist, elbow, and ankle joints and assessed the prevalence of finger joint contractures in 254 young diabetics and 110 controls. The presence of microvascular disease was assessed by ophthalmoscopy and urine analysis for proteinuria. An estimate of long-term diabetic control was obtai...

  5. Revolute joints with clearance in multibody systems

    OpenAIRE

    Flores, Paulo; Ambrósio, Jorge

    2004-01-01

    A computational methodology for dynamic analysis of multibody mechanical systems with joint clearance is presented in this work. Clearances always exist in real joints in order to ensure the correct relative motion between the connected bodies being the gap associated to them a result of machining tolerance, wear, and local deformations. Clearance at different joints is the source for impact forces, resulting in wear and tear of the joints, and consequently the degradation of the system perfo...

  6. Revamped, joint ventures make a comeback.

    Science.gov (United States)

    Peters, G R

    1991-08-01

    After a period of declining popularity, joint ventures are beginning to re-emerge as viable solution to challenges facing health care. Future joint ventures likely will be different, however, in response to problems and resulting legislation. Healthcare providers interested in starting a joint venture should consider five basic formats and some guidelines for developing them. Joint ventures ultimately may become a focal point for renewed efforts at regional healthcare planning. PMID:10145473

  7. Behaviour of high strength steel moment joints

    OpenAIRE

    Girão Coelho, A.M.; Bijlaard, F.S.K.

    2010-01-01

    The design of joints to European standard EN 1993 within the semi-continuous/partially restrained philosophy is restricted to steel grades up to S460. With the recent development of high performance steels, the need for these restrictions should be revisited. The semicontinuous joint modelling can be adopted as long as the joint develops rotation capacity and behaves ductile. The research summarized in this paper focuses on moment joints with components made from high strength steel S460, S69...

  8. Prognosis of motor development and joint hypermobility.

    OpenAIRE

    Tirosh, E; Jaffe, M; Marmur, R; Taub, Y; Rosenberg, Z.

    1991-01-01

    In a study of 59 infants aged 18 months there were 20 with joint hypermobility and delayed motor development, 19 with joint hypermobility and normal motor development, and 20 normal controls. They were reassessed for motor function 3.5 years later at the age of 5 years. Both gross and fine motor performance were significantly delayed in the group of children who exhibited joint hypermobility and motor delay in infancy. No significant delay was evident in those with joint hypermobility only. J...

  9. Adolescent obesity, joint pain, and hypermobility

    OpenAIRE

    Bout-Tabaku, Sharon; Klieger, Sarah B; Wrotniak, Brian H; Sherry, David D; Zemel, Babette S; Stettler, Nicolas

    2014-01-01

    Background Obesity associated with joint pain of the lower extremities is likely due to excessive mechanical load on weight bearing joints. Additional mechanical factors may explain the association between obesity and joint pain. Findings We characterized the association between obesity and non-traumatic lower extremity (LE) joint pain in adolescents and examined the modifying effect of hypermobility on this association. We performed a cross-sectional analysis of data from subjects enrolled i...

  10. Russian upstream joint ventures logging progress

    International Nuclear Information System (INIS)

    This paper reports that Occidental Petroleum Corp. has begun exporting oil from Russia as part of an enhanced recovery joint venture in western Siberia. Oxy holds a 50% interest in the joint venture company, Vanyoganneft, and will market the oil. In other activity, two Canadian companies are marking progress with Russian upstream joint ventures

  11. 22 CFR 228.34 - Joint ventures.

    Science.gov (United States)

    2010-04-01

    ... Financing § 228.34 Joint ventures. A joint venture or unincorporated association is eligible only if each of... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Joint ventures. 228.34 Section 228.34 Foreign Relations AGENCY FOR INTERNATIONAL DEVELOPMENT RULES ON SOURCE, ORIGIN AND NATIONALITY FOR COMMODITIES...

  12. Acupuncture Therapy on Temporomandibular Joint Syndrome

    Institute of Scientific and Technical Information of China (English)

    XIA Nai-nian; HUANG Ming-juan

    2005-01-01

    @@ Temporomandibular Joint (TMJ) syndrome, an commonly and frequently encountered disease, is characterized by motor dysfunction of mandibular joint and snapping articular surface as major complaints, and then tinnitus, facial pain and occasional headache, most patients got limited mouth open and pain inside the joints or masseter muscle. The authors of this article have treated 68cases of TMJ syndrome since 2001.

  13. Joint prosthesis and method of bone fixation

    NARCIS (Netherlands)

    Oosterom, R.; Van der Pijl, A.J; Bersee, H.E.N.; Van der Helm, F.C.; Herder, J.L

    2006-01-01

    The invention relates to a joint prosthesis (10), for example, a knee joint or shoulder joint prosthesis comprising a first, socket-holding prosthesis part (11) for attachment to a first bone (12) and a second, ball-holding prosthesis part (13) for attachment to a second bone (14) that intermates wi

  14. 49 CFR 234.233 - Rail joints.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Rail joints. 234.233 Section 234.233..., DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Maintenance, Inspection, and Testing Maintenance Standards § 234.233 Rail joints. Each non-insulated rail joint...

  15. 17 CFR 300.105 - Joint accounts.

    Science.gov (United States)

    2010-04-01

    ... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Joint accounts. 300.105... A to Part 285 RULES OF THE SECURITIES INVESTOR PROTECTION CORPORATION Accounts of âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a...

  16. 21 CFR 26.73 - Joint Committee.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Joint Committee. 26.73 Section 26.73 Food and... OF PHARMACEUTICAL GOOD MANUFACTURING PRACTICE REPORTS, MEDICAL DEVICE QUALITY SYSTEM AUDIT REPORTS...Frameworkâ Provisions § 26.73 Joint Committee. (a) A Joint Committee consisting of representatives of...

  17. Wilmar joint market model, Documentation

    Energy Technology Data Exchange (ETDEWEB)

    Meibom, P.; Larsen, Helge V. [Risoe National Lab. (Denmark); Barth, R.; Brand, H. [IER, Univ. of Stuttgart (Germany); Weber, C.; Voll, O. [Univ. of Duisburg-Essen (Germany)

    2006-01-15

    The Wilmar Planning Tool is developed in the project Wind Power Integration in Liberalised Electricity Markets (WILMAR) supported by EU (Contract No. ENK5-CT-2002-00663). A User Shell implemented in an Excel workbook controls the Wilmar Planning Tool. All data are contained in Access databases that communicate with various sub-models through text files that are exported from or imported to the databases. The Joint Market Model (JMM) constitutes one of these sub-models. This report documents the Joint Market model (JMM). The documentation describes: 1. The file structure of the JMM. 2. The sets, parameters and variables in the JMM. 3. The equations in the JMM. 4. The looping structure in the JMM. (au)

  18. Wilmar joint market model, Documentation

    International Nuclear Information System (INIS)

    The Wilmar Planning Tool is developed in the project Wind Power Integration in Liberalised Electricity Markets (WILMAR) supported by EU (Contract No. ENK5-CT-2002-00663). A User Shell implemented in an Excel workbook controls the Wilmar Planning Tool. All data are contained in Access databases that communicate with various sub-models through text files that are exported from or imported to the databases. The Joint Market Model (JMM) constitutes one of these sub-models. This report documents the Joint Market model (JMM). The documentation describes: 1. The file structure of the JMM. 2. The sets, parameters and variables in the JMM. 3. The equations in the JMM. 4. The looping structure in the JMM. (au)

  19. Lipoma arborescens affecting multiple joints

    Energy Technology Data Exchange (ETDEWEB)

    Bejia, Ismail; Younes, Mohamed; Touzi, Mongi; Bergaoui, Naceur [EPS Monastir, Department of Rheumatology, Monastir (Tunisia); Moussa, Adnene [Faculty of Medicine of Monastir, Department of Anatomopathology, Monastir (Tunisia); Said, Mourad [EPS Monastir, Department of Radiology, Monastir (Tunisia)

    2005-09-01

    Lipoma arborescens is a rare benign intra-articular lesion of unknown etiology that usually involves the suprapatellar pouch of the knee joint. Clinically, the most common finding is a slow-growing painless swelling, accompanied by intermittent effusion of the joint. We report a case of a multifocal lipoma arborescens localized in the knees and the hips in a 24-year-old man, initially mimicking an inflammatory arthropathy. The diagnosis of lipoma arborescens was made by magnetic resonance imaging of the hips and the knees. Under arthroscopic guidance, the synovial biopsy of the right knee disclosed the specific histological signs of lipoma arborescens. As far as we know, this is the third case of multifocal lipoma arborescens reported in the English literature. (orig.)

  20. Hydrocolonotherapy ankle joints after injuries

    Directory of Open Access Journals (Sweden)

    Volodymyr Muchin

    2016-02-01

    Full Text Available Purpose: to improve efficiency of gydrokinesitherapy by means of specially designed devices and monolasts for patients after ankle joint injuries. Material & Methods: there are pedagogical methods, clinical and radiological methods, anthropometric measurements and goniometry were used. Results: the author's technique of hydrokinesitherapy with application hydrokinesimechanotherapy device in the program of physical rehabilitation which provides optimum conditions for the recovery process was developed. Conclusions: the specially designed hydrokinesomechanotherapeutic device and monolasts are allow strictly controlled movement in all planes of the ankle joint, which contributes to the acceleration of the recovery; the conducted anthropometric and goniometric studies were indicate more rapid elimination of edema, increase movement amplitude, carries opposition to the development of contractures and muscle atrophy.

  1. Afghanistan; Joint Staff Advisory Note

    OpenAIRE

    International Monetary Fund

    2010-01-01

    This Joint Staff Advisory Note discusses Afghanistan’s Poverty Reduction Strategy Paper's annual progress report. Afghanistan has experienced a number of extraordinary challenges that delayed its implementation. The security situation deteriorated markedly and has been dominated by the cross-border Taliban insurgency. Growth started to recover from a devastating drought. In May 2008, food and fuel prices peaked, leading to high inflation and pressure on the budget for additional fuel and fo...

  2. Electrochemical Corrosion of Adhesive Joints

    Czech Academy of Sciences Publication Activity Database

    Vondrák, Jiří

    Vol. 2. Brno: Akademické nakladatelství CERM, 2000 - (Vondrák, J.; Sedlaříková, M.), s. 10.1-10.2 ISBN 80-214-1615-7. [Advanced Batteries and Accumulators /1./. Brno (CZ), 28.08.2000-01.09.2000] Institutional research plan: CEZ:AV0Z4032918 Keywords : adhesive * joints * corrosion Subject RIV: CG - Electrochemistry

  3. Temporomandibular joint dysfunction in children

    OpenAIRE

    Fernanda Mara de Paiva BERTOLI; Estela Maris LOSSO; Ricardo César MORESCA

    2009-01-01

    Introduction and objective: The aim of this study was to review aspects related to the temporomandibular dysfunctions (TMD) in children,like etiology, diagnosis and treatment, emphasizing the importance of the correct diagnosis, since these patients are in their growth and development of the face period. Literature review: The TMDs include many clinical problems that involve the mastigatory muscles, the temporomandibular joint and near structures. In children the symptoms of this syndrome are...

  4. On joint numerical radius II

    Czech Academy of Sciences Publication Activity Database

    Drnovšek, R.; Müller, Vladimír

    2014-01-01

    Roč. 62, č. 9 (2014), s. 1197-1204. ISSN 0308-1087 R&D Projects: GA ČR GA201/09/0473; GA AV ČR IAA100190903 Institutional support: RVO:67985840 Keywords : joint numerical range * numerical radius Subject RIV: BA - General Mathematics Impact factor: 0.738, year: 2014 http://www.tandfonline.com/doi/abs/10.1080/03081087.2013.816303

  5. Joint Commission on rock properties

    Science.gov (United States)

    A joint commission on Rock Properties for Petroleum Engineers (RPPE) has been established by the International Society of Rock Mechanics and the Society of Petroleum Engineers to set up data banks on the properties of sedimentary rocks encountered during drilling. Computer-based data banks of complete rock properties will be organized for sandstones (GRESA), shales (ARSHA) and carbonates (CARCA). The commission hopes to access data sources from members of the commission, private companies and the public domain.

  6. Seabasing and joint expeditionary logistics

    OpenAIRE

    Bender, Amy; Cottle, Jacob; Craddock, Timothy; Dowd, Justin; Feese, Rick; Foster, Brett; Gainey, John; Jimenez, Ivan; Johnson, Brent; Johnson, Terry; Lemmon, John; Levendofske, Michael; Liskey, Dale; Oliphant, Anthony; Olvera, Daniel

    2004-01-01

    Includes supplementary material. Recent conflicts such as Operation Desert Shield/Storm and Operation Iraqi Freedom highlight the logistics difficulties the United States faces by relying on foreign access and infrastructure and large supply stockpiles ashore to support expeditionary operations. The Navy's transformational vision for the future, Sea Power 21, involves Seabasing as a way to address these difficulties by projecting and sustaining joint forces globally from the sea. This stud...

  7. Joint reflection in teacher training

    Czech Academy of Sciences Publication Activity Database

    Tichá, Marie; Hošpesová, A.; Macháčková, Jana

    Plzeň : ZČU PedF, 2006 - (Coufalová, J.), s. 293-298 ISBN 80-7043-478-3. [CIEAEM 58. Srní (CZ), 09.07.2006-15.07.2006] R&D Projects: GA ČR(CZ) GA406/05/2444 Institutional research plan: CEZ:AV0Z10190503 Keywords : individual reflection * joint reflection * teachers´knowledge base Subject RIV: AM - Education

  8. Hydrocolonotherapy ankle joints after injuries

    OpenAIRE

    Volodymyr Muchin; Oleksandr Zviriaka

    2016-01-01

    Muchin V., Zviriaka O. Purpose: to improve efficiency of gydrokinesitherapy by means of specially designed devices and monolasts for patients after ankle joint injuries. Material & Methods: there are pedagogical methods, clinical and radiological methods, anthropometric measurements and goniometry were used. Results: the author's technique of hydrokinesitherapy with application hydrokinesimechanotherapy device in the program of physical rehabilitation which provides optimum conditions for...

  9. Adenosine in inflammatory joint diseases

    OpenAIRE

    Chan, E. S. L.; Fernandez, P.; Cronstein, B. N.

    2007-01-01

    Inflammatory joint diseases are a group of heterogeneous disorders with a variety of different etiologies and disease manifestations. However, there are features that are common to all of them: first, the recruitment of various inflammatory cell types that are attracted to involved tissues over the course of the disease process. Second, the treatments used in many of these diseases are commonly medications that suppress or alter immune function. The demonstration that adenosine has endogenous...

  10. Joints for large superconducting conductors

    International Nuclear Information System (INIS)

    Large fusion magnets call for high-current conductors (up to 60 kA). This has been achieved by the cable-in-conduit conductor concept. The connection of these conductors has to take into account several demanding boundary conditions: a large number of strands (around 1000), a low resistance at high current (1-2 nΩ), low losses in pulsed field operation, Nb3Sn heat treatment, helium tightness control, limited available space. A conceptual design was developed by the CEA, based on the connection of two separate twin boxes clamped together, according to the lap-joint concept. These boxes are machined out of an explosive bonding plate (jacket material/copper), and the electrical connection is achieved by tin-lead soldering of the facing copper soles. After qualification of the explosive bond and validation of the joint concept in the laboratory, the technology was transferred to the industry within the framework of the manufacture of the ITER Toroidal Field Model Coil (TFMC). In addition, three full-size joint samples (FSJS), relevant to different jacket materials and joining techniques, were manufactured by the industry and successfully tested in the SULTAN facility at CRPP, Villigen. The paper reports on the results of the laboratory tests, describes the transfer of technology to industry, and lastly presents some typical experimental results

  11. Mechanical flexible joint design document

    Science.gov (United States)

    Daily, Vic

    1993-01-01

    The purpose of this report is to document the status of the Mechanical Flexible Joint (MFJ) Design Subtask with the intent of halting work on the design. Recommendations for future work is included in the case that the task is to be resumed. The MFJ is designed to eliminate two failure points from the current flex joint configuration, the inner 'tripod configuration' and the outer containment jacket. The MFJ will also be designed to flex 13.5 degrees and have three degrees of freedom. By having three degrees of freedom, the MFJ will allow the Low Pressure Fuel Duct to twist and remove the necessity to angulate the full 11 degrees currently required. The current flex joints are very labor intensive and very costly and a simple alternative is being sought. The MFJ is designed with a greater angular displacement, with three degrees of freedom, to reside in the same overall envelope, to meet weight constraints of the current bellows, to be compatible with cryogenic fuel and oxidizers, and also to be man-rated.

  12. Space Suit Joint Torque Testing

    Science.gov (United States)

    Valish, Dana J.

    2011-01-01

    In 2009 and early 2010, a test was performed to quantify the torque required to manipulate joints in several existing operational and prototype space suits in an effort to develop joint torque requirements appropriate for a new Constellation Program space suit system. The same test method was levied on the Constellation space suit contractors to verify that their suit design meets the requirements. However, because the original test was set up and conducted by a single test operator there was some question as to whether this method was repeatable enough to be considered a standard verification method for Constellation or other future space suits. In order to validate the method itself, a representative subset of the previous test was repeated, using the same information that would be available to space suit contractors, but set up and conducted by someone not familiar with the previous test. The resultant data was compared using graphical and statistical analysis and a variance in torque values for some of the tested joints was apparent. Potential variables that could have affected the data were identified and re-testing was conducted in an attempt to eliminate these variables. The results of the retest will be used to determine if further testing and modification is necessary before the method can be validated.

  13. Magnetic resonance evidence of joint effusion in patients with temporomandibular joint disorders

    Energy Technology Data Exchange (ETDEWEB)

    Ko, Jee Young; Kim, Kee Deog; Park, Chang Seo [Yonsei Univ. College of Dentistry, Seoul (Korea, Republic of)

    2001-06-15

    The purpose of this study was to find the relationship among the joint status, pain and effusion in patients with temporomandibular joint disorders. Materials included 406 patients (812 joints) with clinical records and bilateral TMJ MRIs in TMJ clinic, Yongdong Severance Hospital. All joints were classified in 4 groups in MR images according to the disc status of joint; normal disc position, disc displacement with reduction (DDsR), and also 2 groups according to the bony status of joint; normal bony structure and osteoarthrosis. MR evidence of joint effusion was categorized in 4 groups according to its amount. To determine the relationship between joint pain and joint effusion, 289 patients with unilateral TMJ symptoms were selected from total materials. Joint effusion was found 8.0% in normal disc position, 32.6% in DDcR, and 59.2% in DDsR (83.1% in early state and 23.1% in late stage). Joint effusion was found 39.7% in osteoarthrosis and 35.0% in normal bony structure. Joint effusion was more found in the painful joints (49.8%) than in the painless joints (22.4%) (p<0.001). Joint effusion in the early stage of DDsR only was more found significantly in painful joints (91.9%) than in painless joints (62.1%) (p<0.001). MR evidence of joint effusion might be related to disc displacement regardless of the presence of osteoarthrosis, and the early stage of DDsR was found more frequently combined with joint effusion and joint pain.

  14. Magnetic resonance evidence of joint effusion in patients with temporomandibular joint disorders

    International Nuclear Information System (INIS)

    The purpose of this study was to find the relationship among the joint status, pain and effusion in patients with temporomandibular joint disorders. Materials included 406 patients (812 joints) with clinical records and bilateral TMJ MRIs in TMJ clinic, Yongdong Severance Hospital. All joints were classified in 4 groups in MR images according to the disc status of joint; normal disc position, disc displacement with reduction (DDsR), and also 2 groups according to the bony status of joint; normal bony structure and osteoarthrosis. MR evidence of joint effusion was categorized in 4 groups according to its amount. To determine the relationship between joint pain and joint effusion, 289 patients with unilateral TMJ symptoms were selected from total materials. Joint effusion was found 8.0% in normal disc position, 32.6% in DDcR, and 59.2% in DDsR (83.1% in early state and 23.1% in late stage). Joint effusion was found 39.7% in osteoarthrosis and 35.0% in normal bony structure. Joint effusion was more found in the painful joints (49.8%) than in the painless joints (22.4%) (p<0.001). Joint effusion in the early stage of DDsR only was more found significantly in painful joints (91.9%) than in painless joints (62.1%) (p<0.001). MR evidence of joint effusion might be related to disc displacement regardless of the presence of osteoarthrosis, and the early stage of DDsR was found more frequently combined with joint effusion and joint pain

  15. Joint denervation and neuroma surgery as joint-preserving therapy for ankle pain.

    Science.gov (United States)

    Gohritz, Andreas; Dellon, A Lee; Kalbermatten, Daniel; Fulco, Ilario; Tremp, Mathias; Schaefer, Dirk J

    2013-09-01

    Partial joint denervation or surgical neuroma therapy are alternative concepts to treat pain around the ankle joint that preserve joint function and relieve pain by interrupting neural pathways that transmit pain impulses from the joint to the brain. This review article summarizes the indication, anatomic background, operative techniques, and clinical results of joint denervation or neuroma surgery, which, although rarely reported and used, may provide a valuable alternative treatment in selected patients with neurogenous problems around the ankle. PMID:24008220

  16. Part I. Remembering No. 2 (Ladislav Loerinc). EMO joint venture, joint-stock company - really completely useless organ?

    International Nuclear Information System (INIS)

    In this chapter author reviewed the story of the EMO joint venture, joint-stock company, between Slovenske elektrarne, a. s. and EdF. EMO joint venture, joint-stock company, was established to complete the Mochovce nuclear power plant. EMO joint venture, joint-stock company was closed after one year of work. History of EMO joint venture, joint-stock company, was described by its former general manager Mr. Ladislav Loerinc.

  17. Adaptive strategy for joint measurements

    Science.gov (United States)

    Uola, Roope; Luoma, Kimmo; Moroder, Tobias; Heinosaari, Teiko

    2016-08-01

    We develop a technique to find simultaneous measurements for noisy quantum observables in finite-dimensional Hilbert spaces. We use the method to derive lower bounds for the noise needed to make incompatible measurements jointly measurable. Using our strategy together with recent developments in the field of one-sided quantum information processing we show that the attained lower bounds are tight for various symmetric sets of quantum measurements. We use this characterisation to prove the existence of so called 4-Specker sets, i.e. sets of four incompatible observables with compatible subsets in the qubit case.

  18. Automatic locking knee brace joint

    Science.gov (United States)

    Weddendorf, Bruce (Inventor)

    1995-01-01

    This invention is an apparatus for controlling the pivotal movement of a knee brace comprising a tang-and-clevis joint that has been uniquely modified. Both the tang and the clevis have a set of teeth that, when engaged, can lock the tang and the clevis together. In addition, the tang is biased away from the clevis. Consequently, when there is no axial force (i.e., body weight) on the tang, the tang is free to pivot within the clevis. However, when an axial force is exerted on the tang, the tang is pushed into the clevis, both sets of teeth engage, and the tang and the clevis lock together.

  19. Jet Joint Undertaking. Vol. 2

    International Nuclear Information System (INIS)

    The scientific, technical, experimental and theoretical investigations related to JET tokamak are presented. The JET Joint Undertaking, Volume 2, includes papers presented at: the 15th European Conference on controlled fusion and plasma heating, the 15th Symposium on fusion technology, the 12th IAEA Conference on plasma physics and controlled nuclear fusion research, the 8th Topical Meeting on technology of fusion. Moreover, the following topics, concerning JET, are discussed: experience with wall materials, plasma performance, high power ion cyclotron resonance heating, plasma boundary, results and prospects for fusion, preparation for D-T operation, active gas handling system and remote handling equipment

  20. Joint studies on large CANDU

    International Nuclear Information System (INIS)

    CANDU PHWRs have demonstrated generic benefits which will be continued in future designs. These include economic benefits due to low operating costs, business potential, strategic benefits due to fuel cycle flexibility and operational benefits. These benefits have been realized in Korea through the operation of Wolsong 1, resulting in further construction of PHWRs at the same site. The principal benefit, low electricity cost, is due to the high capacity factor and the low fuel cost for CANDU. The CANDU plant at Wolsong has proven to be a safe, reliable and economical electricity producer. The ability of PHWR to burn natural uranium ensures security of fuel supply. Following successful Technology Transfer via the Wolsong 2,3 and 4 project, future opportunity exists between Korea and Canada for continuing co-operation in research and development to improve the technology base, for product development partnerships, and business opportunities in marketing and building PHWR plants in third countries. High reliability, through excellent design, well-controlled operation, efficient maintenance and low operating costs is critical to the economic viability of nuclear plants. CANDU plants have an excellent performance record. The four operating CANDU 6 plants, operated by four utilities in three countries, are world performance leaders. The CANDU 9 design, with higher output capacity, will help to achieve better site utilization and lower electricity costs. Being an evolutionary design, CANDU 9 assures high performance by utilizing proven systems, and component designs adapted from operating CANDU plants (Bruce B, Darlington and CANDU 6). All system and operating parameters are within the operating proven range of current plants. KAERI and AECL have an agreement to perform joint studies on future PHWR development. The objective of the joint studies is to establish the requirements for the design of future advanced CANDU PHWR including the utility need for design improvements

  1. The joint implementation mechanisms (MOC)

    International Nuclear Information System (INIS)

    The aim of the joint implementation mechanisms (MOC) is aims to favor the fight against the climatic change, by the implementing of activities, technologies and appropriate techniques emitting less greenhouse gases in south countries and by the possibility of reducing the greenhouse gases emissions for a more economical cost. This guide brings a practical assistance to the projects set-up: the possible concerned projects, the formalization of the project, the methodology, the involvement of the carbon credits in the project financing. (A.L.B.)

  2. Water flow in single rock joints

    International Nuclear Information System (INIS)

    To study the hydromechanical properties of single rock joints a technique to make transparent replicas of natural joint surfaces has been developed. Five different joint samples were replicated and studied. The aperture distribution of the joints were obtained through a measurements method provided by the transparent replicas, The principle behind the method is that a water drop with a known volume, which is placed inside a joint, will cover a certain area of the surface depending on the size of aperture at the actual point. Flow tests were performed on the same joint replicas. The tortuosity of the flow and the velocity along single stream lines were measured using colour injections in the water flow through the joints. The equivalent hydraulic apertures determined from the flow tests were shown to be smaller than the average mechanical apertures. The velocity of the flow varies strongly between different paths over the joint depending on the spatial distribution of the apertures. The degree of matedness between the joint surfaces is an important factor influencing the channeling character of the joints. (38 refs.)(author)

  3. Water flow in single rock joints

    International Nuclear Information System (INIS)

    To study the hydromechanical properties of single rock joints a technique to make transparent replicas of natural joint surfaces has been developed. Five different joint samples were replicated and studied. The aperture distribution of the joints were obtained through a measurement method provided by the transparent replicas. The principle behind the method is that a water drop with a known volume, which is placed inside a joint, will cover a certain area of the surface depending on the average size of aperture at the actual point. Flow tests were performed on the same joint replicas. The tortuousity of the flow and the velocity along single stream lines were measured using colour injections into the water flow through the joints. The equivalent hydraulic apertures determined from the flow tests where shown to be smaller than the average mechanical apertures. The velocity of the flow varies strongly between different paths over the joint depending on the spatial distribution of the apertures. The degree of matedness between the joint surfaces is an important factor influencing the channeling character of the joints. (author) (38 refs.)

  4. Localized chondrocalcinosis in traumatized joints

    International Nuclear Information System (INIS)

    The radiographs and medical records were reviewed of 76 patients who presented with chondrocalcinosis over a period of two years. Two groups of patients could be distinguished. The first group consisted of 58 mostly elderly patients (age 53-89 years [mean 71.8]). In these, chondrocalcinosis was most likely to be caused by an underlying disease such as calcium crystal deposition disease or it was present in association with osteoarthritis. In most cases of this group the findings were bilateral. The second group consisted of 18 patients who were significantly younger (age 15-69 years [mean 43.1]). In these patients there was no evidence of an underlying disease. Chondrocalcinosis was seen in only one joint, which had sustained damage by surgery or trauma. The knees were affected in the majority of cases and meniscectomy was believed to be the previous trauma in most of these cases. The hands were involved in two patients, the wrist, shoulder, or elbow were involved in other patients. In two cases with chondrocalcinosis in the hand and knee, the findings disappeared several weeks to months after the injury. The findings in the group of patients with a history of trauma or surgery and no other disease, support the concept that chondrocalcinosis may result from previous joint damage. (orig.)

  5. Flat H Frangible Joint Evolution

    Science.gov (United States)

    Diegelman, Thomas E.; Hinkel, Todd J.; Benjamin, Andrew; Rochon, Brian V.; Brown, Christopher W.

    2016-01-01

    Space vehicle staging and separation events require pyrotechnic devices. They are single-use mechanisms that cannot be tested, nor can failure-tolerant performance be demonstrated in actual flight articles prior to flight use. This necessitates the implementation of a robust design and test approach coupled with a fully redundant, failure-tolerant explosive mechanism to ensure that the system functions even in the event of a single failure. Historically, NASA has followed the single failure-tolerant (SFT) design philosophy for all human-rated spacecraft, including the Space Shuttle Program. Following the end of this program, aerospace companies proposed building the next generation human-rated vehicles with off-the-shelf, non-redundant, zero-failure-tolerant (ZFT) separation systems. Currently, spacecraft and launch vehicle providers for both the Orion and Commercial Crew Programs (CCPs) plan to deviate from the heritage safety approach and NASA's SFT human rating requirements. Both programs' partners have base-lined ZFT frangible joints for vehicle staging and fairing separation. These joints are commercially available from pyrotechnic vendors. Non-human-rated missions have flown them numerous times. The joints are relatively easy to integrate structurally within the spacecraft. In addition, the separation event is debris free, and the resultant pyro shock is lower than that of other design solutions. It is, however, a serious deficiency to lack failure tolerance. When used for critical applications on human-rated vehicles, a single failure could potentially lead to loss of crew (LOC) or loss of mission (LOM)). The Engineering and Safety & Mission Assurance directorates within the NASA Johnson Space Center took action to address this safety issue by initiating a project to develop a fully redundant, SFT frangible joint design, known as the Flat H. Critical to the ability to retrofit on launch vehicles being developed, the SFT mechanisms must fit within the same

  6. MR arthrography of the ankle joint

    International Nuclear Information System (INIS)

    Due to its superior soft tissue contrast conventional MRI is the imaging method of choice in the evaluation of ankle joint disorders. Conventional MR imaging can accurately demonstrate normal or acutely injured ligaments; however, in subacute and chronic injury joint fluid necessary for delineation of injured ligaments is absent and MR arthrography should be performed. MR arthrography uses the intraarticular injection of contrast material to distend the joint, yielding improved discrimination of intraarticular structures. This joint distension with MR arthrography is also helpful in the staging of osteochondritis dissecans, since in cases of unstable lesions tracking of contrast material into the interface can be more easily demonstrated. Finally, high contrast and joint distension by MR arthrography improves the detection of intraarticular loose bodies, which often require surgery. MR artrography, although invasive, may provide additional information in various ankle joint disorders. (orig.)

  7. Solder joint technology materials, properties, and reliability

    CERN Document Server

    Tu, King-Ning

    2007-01-01

    Solder joints are ubiquitous in electronic consumer products. The European Union has a directive to ban the use of Pb-based solders in these products on July 1st, 2006. There is an urgent need for an increase in the research and development of Pb-free solders in electronic manufacturing. For example, spontaneous Sn whisker growth and electromigration induced failure in solder joints are serious issues. These reliability issues are quite complicated due to the combined effect of electrical, mechanical, chemical, and thermal forces on solder joints. To improve solder joint reliability, the science of solder joint behavior under various driving forces must be understood. In this book, the advanced materials reliability issues related to copper-tin reaction and electromigration in solder joints are emphasized and methods to prevent these reliability problems are discussed.

  8. Using Joint Interviews to Add Analytic Value.

    Science.gov (United States)

    Polak, Louisa; Green, Judith

    2016-10-01

    Joint interviewing has been frequently used in health research, and is the subject of a growing methodological literature. We review this literature, and build on it by drawing on a case study of how people make decisions about taking statins. This highlights two ways in which a dyadic approach to joint interviewing can add analytic value compared with individual interviewing. First, the analysis of interaction within joint interviews can help to explicate tacit knowledge and to illuminate the range of often hard-to-access resources that are drawn upon in making decisions. Second, joint interviews mitigate some of the weaknesses of interviewing as a method for studying practices; we offer a cautious defense of the often-tacit assumption that the "naturalness" of joint interviews strengthens their credibility as the basis for analytic inferences. We suggest that joint interviews are a particularly appropriate method for studying complex shared practices such as making health decisions. PMID:25850721

  9. Reconfigurable robot based on modular joint concept

    Institute of Scientific and Technical Information of China (English)

    Shi Shicai; Xie Zongwu; Gao Xiaohui; Jin Minghe; Zhu Yingyuan; Ni Fenglei; Liu Hong; Kraemer Erich; Hirzinger Gerd

    2006-01-01

    A reconfigurable modular robot was developed for a free-flying robot project. This robot was composed of 6 same modular joints and one gripper. In order to save space and cost for transporting it into the space, the robot should be folded overall and locked. A big central hole in the modular joint was designed for the placement of the cables and plugs in the robot arm, which prevented them from damage of high temperature, radiation in the space environment and the motion of the robot. Multiple sensors were integrated into the fully modular joint, such as joint torque sensor, joint position sensor and temperature sensors, which made the joint more intelligent. A zero gravity experimental system was developed to verify the functions of the robot under zero gravity environment.

  10. Thermal treatment of dissimilar steels' welded joints

    Science.gov (United States)

    Nikulina, A. A.; Denisova, A. S.; Gradusov, I. N.; Ryabinkina, P. A.; Rushkovets, M. V.

    2016-04-01

    In this paper combinations of chrome-nickel steel and high-carbon steel, produced by flash butt welding after heat treatment, are investigated. Light and electron microscopic studies show that the welded joints after heat treatment have a complex structure consisting of several phases as initial welded joints. A martensite structure in welded joints after thermal treatment at 300... 800 °C has been found.

  11. Valuing Joint Ventures Using Real Options

    OpenAIRE

    Ulrich Pape; Stephan Schmidt-Tank

    2005-01-01

    As the valuation of strategic measures becomes increasingly important, relatively few articles have discussed the valuation methods pertained for joint ventures. This paper shows that real options contribute to a better valuation of joint venture projects through superior reflection of the value drivers compared to traditional valuation methodology. Particularly, the strategic value of a joint venture and the value of flexibility that stems from a less than full commitment can be determined u...

  12. Joint hypermobility syndrome and related pain

    OpenAIRE

    Nilay Sahin; Aziz Atik; Serdar Sargin

    2016-01-01

    Hypermobility is defined as an abnormally increased range of motion of a joint resulting from the excessive laxity of the soft tissues. This paper is focused on this commonly forgotten cause of several morbidities. The etiology of hypermobility is not very well known. One decade ago, joint hypermobility syndrome was considered as a benign condition, but now it is recognized as a significant contributor to chronic musculoskeletal pain, besides impacting on other organs. Patients with joint hyp...

  13. Opioid ligands and receptors of the joint

    OpenAIRE

    Bergström, Jonas

    2006-01-01

    The aim was to explore the occurrence of an opioid system in joints. Thus, joint tissues from rats with and without arthritis and also from patients with knee osteoarthrosis were investigated by EM, immunohistochemistry, RIA, HPLC, receptor binding assay and RT-PCR. In rat joints, EM demonstrated the occurrence of met-enkephalin (ME) in nerve fibers, but also in osteoblasts, osteocytes, endothelial, synovial and monoblastic cells. The novel finding of multiple sources of op...

  14. Subspace Methods for Joint Sparse Recovery

    OpenAIRE

    Lee, Kiryung; Bresler, Yoram; Junge, Marius

    2010-01-01

    We propose robust and efficient algorithms for the joint sparse recovery problem in compressed sensing, which simultaneously recover the supports of jointly sparse signals from their multiple measurement vectors obtained through a common sensing matrix. In a favorable situation, the unknown matrix, which consists of the jointly sparse signals, has linearly independent nonzero rows. In this case, the MUSIC (MUltiple SIgnal Classification) algorithm, originally proposed by Schmidt for the direc...

  15. Septic Arthritis in the Temporomandibular Joint

    OpenAIRE

    2015-01-01

    Septic arthritis of the temporomandibular joint (TMJ) is a rare event that has only been reported a few dozen times worldwide. This case is remarkable for septic arthritis of the TMJ joint in an otherwise healthy male. Case Report: A 24-year-old male presented to the emergency department with periauricular swelling, erythema, fever, myalgia's and generalized joint pain. He had previously sought medical attention and was placed on ciprofloxacin. However, he developed facial swelling and a rash...

  16. COMPLICATIONS OF JOINT, TENDON, AND MUSCLE INJECTIONS

    OpenAIRE

    Cheng, Jianguo; Abdi, Salahadin

    2007-01-01

    Prevention of complications is one of the most important aspects of patient care in pain management. The objective of this study is to review documented complications in medical literature that are associated with interventional pain management, specifically those associated with joint, tendon, and muscle injections. We conducted Medline research from 1966 to November 2006 using keywords complication, injection, radiofrequency, closed claim, facet, zygophyseal joint, sacroiliac joint, shoulde...

  17. Life Estimation of Hip Joint Prosthesis

    Science.gov (United States)

    Desai, C.; Hirani, H.; Chawla, A.

    2014-11-01

    Hip joint is one of the largest weight-bearing structures in the human body. In the event of a failure of the natural hip joint, it is replaced with an artificial hip joint, known as hip joint prosthesis. The design of hip joint prosthesis must be such so as to resist fatigue failure of hip joint stem as well as bone cement, and minimize wear caused by sliding present between its head and socket. In the present paper an attempt is made to consider both fatigue and wear effects simultaneously in estimating functional-life of the hip joint prosthesis. The finite element modeling of hip joint prosthesis using HyperMesh™ (version 9) has been reported. The static analysis (load due to the dead weight of the body) and dynamic analysis (load due to walking cycle) have been described. Fatigue life is estimated by using the S-N curve of individual materials. To account for progressive wear of hip joint prosthesis, Archard's wear law, modifications in socket geometry and dynamic analysis have been used in a sequential manner. Using such sequential programming reduction in peak stress has been observed with increase in wear. Finally life is estimated on the basis of socket wear.

  18. Postoperative radiologic imaging of joint arthroplasty

    International Nuclear Information System (INIS)

    With increased life expectancy in industrialised countries, improvement of implant design and operative technique, arthroplasty has become a routine procedure. The hip and knee joints are treated by arthroplasty most frequently. Nowadays joint replacement can be performed in many other joints. Radiologic imaging is an important tool for evaluation of the operative results and for detection of early and late complications. In the following article we describe the relevance of different imaging modalities as well as their systematic application in patients with joint arthroplasty. (orig.)

  19. Joint Global Change Research Institute (JGCRI)

    Data.gov (United States)

    Federal Laboratory Consortium — The Joint Global Change Research Institute (JGCRI) is dedicated to understanding the problems of global climate change and their potential solutions. The Institute...

  20. 38 CFR 4.45 - The joints.

    Science.gov (United States)

    2010-07-01

    ... (from flail joint, resections, nonunion of fracture, relaxation of ligaments, etc.). (c) Weakened... the purpose of rating disability from arthritis, the shoulder, elbow, wrist, hip, knee, and ankle...

  1. Joint prosthesis and method of bone fixation

    OpenAIRE

    Oosterom, R; Pijl, A J; Bersee, H.E.N.; Van der Helm, F.C.; Herder, J. L.

    2006-01-01

    The invention relates to a joint prosthesis (10), for example, a knee joint or shoulder joint prosthesis comprising a first, socket-holding prosthesis part (11) for attachment to a first bone (12) and a second, ball-holding prosthesis part (13) for attachment to a second bone (14) that intermates with the first prosthesis part, wherein the first bone and the second bone are situated at either side of a joint, and wherein the ball (2) of the second prosthesis part is rotatably received in the ...

  2. Joint hypermobility: incidence and some clinical symptoms

    Directory of Open Access Journals (Sweden)

    M P Isaev

    2003-01-01

    Full Text Available Objective. To study joint mobility range among urban population aged 18 to 30 years and to assess association of joint and other connective tissue structures disorders clinical signs with hypermobility. Material and methods. 769 randomly selected individuals aged 18 to 30 (mean - 25,56 years (419 female and 350 male were examined. Hypermobility was assessed with 9-point Beighton scale. Examination included skin stretchability evaluation at elbow back surface, determination of flat feet, high palate, joint pain and deformities of knee joints, joint luxation and subluxation, hand and feet vasospastic disturbances, cardiac pain, oculist examination. Methods of variational statistics were used (x2, Student's test, Spirmen's correlation. Results. Hypermobility incidence and joint mobility in population aged 18 to 30 years in Orenburg largely comply with data received in Moscow. Joint mobility up to 5 points in women and up to 4 points in men is usual for persons of this age and in absence of additional clinical symptoms cannot be considered as pathological. Knee joint deformities, presence of high palate, cardiac pain accompanied by signs of vegetative dysfunction, hand and feet vasospastic disturbances are significantly connected with degree of joint mobility and in some cases can help in hypermobility syndrome diagnosis.

  3. The joints of the evolving foot. Part I. The ankle joint.

    OpenAIRE

    Lewis, O. J.

    1980-01-01

    Evidence is presented to suggest that the eutherian ankle joint has been derived from a meniscus-containing joint such as that found in extant arboreal marsupials. Probable morphological derivatives of this meniscus are identifiable in the Eutheria. The form and function of the joint are described in sub-human Primates and the adaptations which characterize the joint in bipedal man are noted. These morphological findings permit some speculation about the palaeocology of the earliest mammals w...

  4. Pain in the hip joint

    Directory of Open Access Journals (Sweden)

    Yuri Aleksandrovich Olyunin

    2013-01-01

    Full Text Available Pathological changes that develop in the hip joints (HJ have different origins and mechanisms of development, but their main manifestation is pain. The nature of this pain cannot be well established on frequent occasions. The English-language medical literature currently classifies such disorders as greater trochanter pain syndrome (GTPS. Its major signs are chronic pain and local palpatory tenderness in the outer part of HJ. The development of GTPS may be associated with inflammation of the synovial bursae situated in the greater tronchanter, as well as with tendinitis, myorrhexis, iliotibial band syndrome, and other local changes in the adjacent tissues or with systemic diseases. So GTPS may be characterized as regional pain syndrome that frequently mimics pain induced by different diseases, including myofascial pain syndrome, osteoarthrosis, spinal diseases, etc.

  5. Computational Intelligence : International Joint Conference

    CERN Document Server

    Dourado, António; Rosa, Agostinho; Filipe, Joaquim; Kacprzyk, Janusz

    2016-01-01

    The present book includes a set of selected extended papers from the fifth International Joint Conference on Computational Intelligence (IJCCI 2013), held in Vilamoura, Algarve, Portugal, from 20 to 22 September 2013. The conference was composed by three co-located conferences:  The International Conference on Evolutionary Computation Theory and Applications (ECTA), the International Conference on Fuzzy Computation Theory and Applications (FCTA), and the International Conference on Neural Computation Theory and Applications (NCTA). Recent progresses in scientific developments and applications in these three areas are reported in this book. IJCCI received 111 submissions, from 30 countries, in all continents. After a double blind paper review performed by the Program Committee, only 24 submissions were accepted as full papers and thus selected for oral presentation, leading to a full paper acceptance ratio of 22%. Additional papers were accepted as short papers and posters. A further selection was made after ...

  6. Computational Intelligence : International Joint Conference

    CERN Document Server

    Rosa, Agostinho; Cadenas, José; Dourado, António; Madani, Kurosh; Filipe, Joaquim

    2016-01-01

    The present book includes a set of selected extended papers from the sixth International Joint Conference on Computational Intelligence (IJCCI 2014), held in Rome, Italy, from 22 to 24 October 2014. The conference was composed by three co-located conferences:  The International Conference on Evolutionary Computation Theory and Applications (ECTA), the International Conference on Fuzzy Computation Theory and Applications (FCTA), and the International Conference on Neural Computation Theory and Applications (NCTA). Recent progresses in scientific developments and applications in these three areas are reported in this book. IJCCI received 210 submissions, from 51 countries, in all continents. After a double blind paper review performed by the Program Committee, 15% were accepted as full papers and thus selected for oral presentation. Additional papers were accepted as short papers and posters. A further selection was made after the Conference, based also on the assessment of presentation quality and audience in...

  7. Pain in the hip joint

    Directory of Open Access Journals (Sweden)

    Yuri Aleksandrovich Olyunin

    2013-06-01

    Full Text Available Pathological changes that develop in the hip joints (HJ have different origins and mechanisms of development, but their main manifestation is pain. The nature of this pain cannot be well established on frequent occasions. The English-language medical literature currently classifies such disorders as greater trochanter pain syndrome (GTPS. Its major signs are chronic pain and local palpatory tenderness in the outer part of HJ. The development of GTPS may be associated with inflammation of the synovial bursae situated in the greater tronchanter, as well as with tendinitis, myorrhexis, iliotibial band syndrome, and other local changes in the adjacent tissues or with systemic diseases. So GTPS may be characterized as regional pain syndrome that frequently mimics pain induced by different diseases, including myofascial pain syndrome, osteoarthrosis, spinal diseases, etc.

  8. Temporomandibular joint dysfunction in children

    Directory of Open Access Journals (Sweden)

    Fernanda Mara de Paiva BERTOLI

    2009-03-01

    Full Text Available Introduction and objective: The aim of this study was to review aspects related to the temporomandibular dysfunctions (TMD in children,like etiology, diagnosis and treatment, emphasizing the importance of the correct diagnosis, since these patients are in their growth and development of the face period. Literature review: The TMDs include many clinical problems that involve the mastigatory muscles, the temporomandibular joint and near structures. In children the symptoms of this syndrome are present although with mild intensitywhen compared to adults. In relation to the prevalence, there is a great amount of discordance between the authors. The TMDs in childrenhave multifatorial etiology, and the most cited in literature areparafunctional habits, traumas, occlusal, systemic and psychologicalfactors. Conclusion: The signs and symptoms of the TMDs in pediatricpopulations are generally mild and increase with age, being veryimportant the early diagnosis and the inclusion of this kind of exam in routine examinations.

  9. Joint Attention in Autism: Teaching Smiling Coordinated with Gaze to Respond to Joint Attention Bids

    Science.gov (United States)

    Krstovska-Guerrero, Ivana; Jones, Emily A.

    2013-01-01

    Children with autism demonstrate early deficits in joint attention and expressions of affect. Interventions to teach joint attention have addressed gaze behavior, gestures, and vocalizations, but have not specifically taught an expression of positive affect such as smiling that tends to occur during joint attention interactions. Intervention was…

  10. Complications Related to Metal-on-Metal Articulation in Trapeziometacarpal Joint Total Joint Arthroplasty

    DEFF Research Database (Denmark)

    Frølich, Christina; Hansen, Torben Bæk

    2015-01-01

    Adverse reactions to metal-on-metal (MoM) prostheses are well known from total hip joint resurfacing arthroplasty with elevated serum chrome or cobalt, pain and pseudo tumor formation. It may, however, also be seen after total joint replacement of the trapeziometacarpal joint using MoM articulation...

  11. Nomenclature and classification of temporomandibular joint disorders

    NARCIS (Netherlands)

    Stegenga, B.

    2010-01-01

    P>Currently, there are basically two approaches to classification, one based on structural and one on positional changes occurring within the joint. Despite the increase in knowledge of pathologic changes occurring within the temporomandibular joint (TMJ), the disc still seems to be a central issue

  12. Temporomandibular Joint Disorders and Orofacial Pain.

    Science.gov (United States)

    Ahmad, Mansur; Schiffman, Eric L

    2016-01-01

    Temporomandibular disorders (TMD) affect 5% to 12% of the United States population. This article discusses common conditions related to temporomandibular joints, including disc displacements, inflammatory disturbances, loose joint bodies, traumatic disturbances, and developmental conditions. Also addressed are the appropriate imaging modalities and diagnostic criteria for TMD. PMID:26614951

  13. Detection of Arthritis by Joint Scanning

    International Nuclear Information System (INIS)

    Detection and identification of early arthritis is frequently difficult with routine methods. Several tracers, 131I human serum albumin (25 μCi/10 lb), 99mTc human serum albumin (1-3 mCi), 131I iodipamide (40 μCi/10 lb), and 99mTc pertechnetate (10 mCi), have been employed for joint scanning to detect synovitis produced by arthritis in joints of the extremities. When administered intravenously, the 25% increase in localization of these tracers in the synovial membrane, if there is active synovitis, can be demonstrated by scintillation scanning. This ability to detect synovitis at an early stage enables the joint scan to show areas of active synovitis not demonstrated on roentgenograms. The scan may objectively confirm or disprove questionable physical findings. From this standpoint the technique has been useful in determining whether joint pain is functional or due to arthritis as a negative localization tends to rule out active synovitis as the cause of the pain. The scan demonstration of a positive localization of the tracer in several joints when only one area is symptomatic is evidence that joint pain is due to systemic disease. The short half-life tracera permit serial studies to follow the course of an arthritis process. Use of 99mTc pertechnetate and an Anger camera have made joint scanning a practical technique for clinical use. A review of the accuracy of joint scanning in 130 cases as compared to roentgenograms is presented. (author)

  14. High quality joints of copper bus bars

    Directory of Open Access Journals (Sweden)

    Samarjit Bhattacharyya,

    2010-08-01

    Full Text Available Efficient joints in copper bus bar conductors can be made very simply by bolting and clamping. This paper proposes the method to maximize the jointing efficiency in order to eliminate hot spots in switchgears by optimizing the effect of spreading resistance and interface resistance.

  15. Analysis of Joint Ventures Financial State

    Directory of Open Access Journals (Sweden)

    Alla V. Dmitrenko

    2013-01-01

    Full Text Available The article describes the basic techniques for the analysis of businesses financial state and methods that were adapted for the joint ventures activities, analyses joint venture financial state, makes conclusions and submits reasonable proposals for improvement of its future activities

  16. Simulation of failure process of jointed rock

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    A modified discontinuous deformation analysis (DDA) algorithm was proposed to simulate the failure behavior of jointed rock.In the proposed algorithm,by using the Monte-Carlo technique,random joint network was generated in the domain of interest.Based on the joint network,the triangular DDA block system was automatically generated by adopting the advanced front method.In the process of generating blocks,numerous artificial joints came into being,and once the stress states at some artificial joints satisfy the failure criterion given beforehand,artificial joints will turn into real joints.In this way,the whole fragmentation process of rock mass can be replicated.The algorithm logic was described in detail,and several numerical examples were carried out to obtain some insight into the failure behavior of rock mass containing random joints.From the numerical results,it can be found that the crack initiates from the crack tip,the growth direction of the crack depends upon the loading and constraint conditions,and the proposed method can reproduce some complicated phenomena in the whole process of rock failure.

  17. 29 CFR 791.2 - Joint employment.

    Science.gov (United States)

    2010-07-01

    ... INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT... employment relationship with a different employer. A determination of whether the employment by the employers... the employee by the other joint employer or employers. 4 Walling v. Friend, et al., 156 F. 2d 429...

  18. CT diagnosis in the elbow joint

    International Nuclear Information System (INIS)

    The normal anatomy of the elbow joint is described. Diverse pathologic joint alterations, e.g. fractures and dislocations, ostheochondritis, inflammatory changes, and ulnar nerve lesion are demonstrated. Particular attention is paid to threedimensional (3D-) reconstruction of demonstrable pathologic findings. (orig.)

  19. Creep behavior evaluation of welded joint

    International Nuclear Information System (INIS)

    In the creep design of high temperature structural elements, it is necessary to grasp the creep performance of joints as a whole, paying attention to the essential lack of uniformity between the material qualities of parent metals and welds. In this study, the factors controlling the creep performance of butt welded joints were investigated theoretically, when they were subjected to lateral tension and longitudinal tension. It was clarified that the rupture time in the case of laterally pulled joints was determined by the ratio of the creep rupture times of weld metals and parent metals, and the rupture time in the case of longitudinally pulled joints was determined by the ratio of the creep rupture times and the ratio of the creep strain rates of weld metals and parent metals. Moreover, when the joints of the former ratio less than 1 and the latter ratio larger than 1 were investigated experimentally, the rupture time in the case of laterally pulled joints was affected by the relative thickness, and when the relative thickness was large, the theoretical and the experimental values coincided, but the relative thickness was small, the theoretical values gave the evaluation on safe side as compared with the experimental values due to the effect of restricting deformation. In the case of longitudinally pulled joints, the theoretical and the experimental values coincided relatively well. The diagram of classifying the creep performance of welded joints was proposed. (Kako, I.)

  20. Behaviour of high strength steel moment joints

    NARCIS (Netherlands)

    Girão Coelho, A.M.; Bijlaard, F.S.K.

    2010-01-01

    The design of joints to European standard EN 1993 within the semi-continuous/partially restrained philosophy is restricted to steel grades up to S460. With the recent development of high performance steels, the need for these restrictions should be revisited. The semicontinuous joint modelling can b

  1. Biomimetic Composite Structural T-joints

    Institute of Scientific and Technical Information of China (English)

    Vimal Kumar Thummalapalli; Steven L.Donaldson

    2012-01-01

    Biological structural fixed joints exhibit unique attributes,including highly optimized fiber paths which minimize stress concentrations.In addition,since the joints consist of continuous,uncut fiber architectures,the joints enable the organism to transport information and chemicals from one part of the body to the other.To the contrary,sections of man-made composite material structures are often joined using bolted or bonded joints,which involve low strength and high stress concentrations.These methods are also expensive to achieve.Additional functions such as fluid transport,electrical signal delivery,and thermal conductivity across the joints typically require parasitic tubes,wires,and attachment clips.By using the biomimetic methods,we seek to overcome the limitations which are present in the conventional methods. In the present work,biomimetic co-cured composite sandwich T-joints were constructed using unidirectional glass fiber,epoxy resin,and structural foam.The joints were fabricated using the wet lay-up vacuum bag resin infusion method.Foam sandwich T-joints with multiple continuous fiber architectures and sandwich foam thickness were prepared.The designs were tested in quasi-static bending using a mechanical load frame.The significantweight savings using the biomimetic approaches is discussed,as well as a comparison of failure modes versus architecture is described.

  2. ECOWindS Joint Action Plan

    DEFF Research Database (Denmark)

    2014-01-01

    The Joint Action Plan (JAP) is a deliverable of the ECOWindS project Work Package 4 (WP4) “Joint Action Plan”. It presents a plan of action or a roadmap for research, development, and innovation (RDI) for the Offshore Wind Service (OWS) industry. The objective of the JAP is to be an international...

  3. The cricothyroid joint in elderly Japanese individuals.

    Science.gov (United States)

    Serikawa, Masamitu; Yamamoto, Masahito; Kawamoto, Ai; Katori, Yukio; Kinoshita, Hideaki; Matsunaga, Satoru; Abe, Shin-Ichi

    2016-06-01

    Using 15 cricothyroid joint (CT joint) specimens obtained from donated cadavers of elderly individuals, we examined the morphologies of the ceratocricoid ligaments as well as the synovial tissue. The ligaments consistently contained abundant elastic fibers: the fibers tended to be straight on the anterior side in contrast to a mesh-like arrangement on the posterior side. Thick and/or long synovial folds were often evident in the CT joint. The synovial tissue usually contained CD68-positive macrophages, but the positive cells were often restricted to certain parts of the tissue. Factor VIII-positive capillaries were present but few in number, and CD3- or IgM-positive lymphocytes were absent in the synovial tissue. Degenerative changes in the joint cartilage, such as roughness or thinning, were often present, but no cartilage defects were evident. Therefore, in contrast to the small, non-weight-bearing joints of the musculoskeletal system, we considered the degeneration of the CT joint to be a specific, silent form of osteoarthritis. For high-pitched phonation and ossification of the laryngeal cartilage, the CT joint in elderly individuals seemed to maintain its anterior gliding and rotation with the aid of elastic fiber-rich tissues compensating for the loss of congruity between the joint cartilage surfaces. PMID:26286109

  4. The analysis of adhesively bonded advanced composite joints using joint finite elements

    Science.gov (United States)

    Stapleton, Scott E.

    The design and sizing of adhesively bonded joints has always been a major bottleneck in the design of composite vehicles. Dense finite element (FE) meshes are required to capture the full behavior of a joint numerically, but these dense meshes are impractical in vehicle-scale models where a course mesh is more desirable to make quick assessments and comparisons of different joint geometries. Analytical models are often helpful in sizing, but difficulties arise in coupling these models with full-vehicle FE models. Therefore, a joint FE was created which can be used within structural FE models to make quick assessments of bonded composite joints. The shape functions of the joint FE were found by solving the governing equations for a structural model for a joint. By analytically determining the shape functions of the joint FE, the complex joint behavior can be captured with very few elements. This joint FE was modified and used to consider adhesives with functionally graded material properties to reduce the peel stress concentrations located near adherend discontinuities. Several practical concerns impede the actual use of such adhesives. These include increased manufacturing complications, alterations to the grading due to adhesive flow during manufacturing, and whether changing the loading conditions significantly impact the effectiveness of the grading. An analytical study is conducted to address these three concerns. Furthermore, proof-of-concept testing is conducted to show the potential advantages of functionally graded adhesives. In this study, grading is achieved by strategically placing glass beads within the adhesive layer at different densities along the joint. Furthermore, the capability to model non-linear adhesive constitutive behavior with large rotations was developed, and progressive failure of the adhesive was modeled by re-meshing the joint as the adhesive fails. Results predicted using the joint FE was compared with experimental results for various

  5. The Analysis of Adhesively Bonded Advanced Composite Joints Using Joint Finite Elements

    Science.gov (United States)

    Stapleton, Scott E.; Waas, Anthony M.

    2012-01-01

    The design and sizing of adhesively bonded joints has always been a major bottleneck in the design of composite vehicles. Dense finite element (FE) meshes are required to capture the full behavior of a joint numerically, but these dense meshes are impractical in vehicle-scale models where a course mesh is more desirable to make quick assessments and comparisons of different joint geometries. Analytical models are often helpful in sizing, but difficulties arise in coupling these models with full-vehicle FE models. Therefore, a joint FE was created which can be used within structural FE models to make quick assessments of bonded composite joints. The shape functions of the joint FE were found by solving the governing equations for a structural model for a joint. By analytically determining the shape functions of the joint FE, the complex joint behavior can be captured with very few elements. This joint FE was modified and used to consider adhesives with functionally graded material properties to reduce the peel stress concentrations located near adherend discontinuities. Several practical concerns impede the actual use of such adhesives. These include increased manufacturing complications, alterations to the grading due to adhesive flow during manufacturing, and whether changing the loading conditions significantly impact the effectiveness of the grading. An analytical study is conducted to address these three concerns. Furthermore, proof-of-concept testing is conducted to show the potential advantages of functionally graded adhesives. In this study, grading is achieved by strategically placing glass beads within the adhesive layer at different densities along the joint. Furthermore, the capability to model non-linear adhesive constitutive behavior with large rotations was developed, and progressive failure of the adhesive was modeled by re-meshing the joint as the adhesive fails. Results predicted using the joint FE was compared with experimental results for various

  6. MODELING UNDERGROUND STRUCTURE VULNERABILITY IN JOINTED ROCK

    Energy Technology Data Exchange (ETDEWEB)

    R. SWIFT; D. STEEDMAN

    2001-02-01

    The vulnerability of underground structures and openings in deep jointed rock to ground shock attack is of chief concern to military planning and security. Damage and/or loss of stability to a structure in jointed rock, often manifested as brittle failure and accompanied with block movement, can depend significantly on jointed properties, such as spacing, orientation, strength, and block character. We apply a hybrid Discrete Element Method combined with the Smooth Particle Hydrodynamics approach to simulate the MIGHTY NORTH event, a definitive high-explosive test performed on an aluminum lined cylindrical opening in jointed Salem limestone. Representing limestone with discrete elements having elastic-equivalence and explicit brittle tensile behavior and the liner as an elastic-plastic continuum provides good agreement with the experiment and damage obtained with finite-element simulations. Extending the approach to parameter variations shows damage is substantially altered by differences in joint geometry and liner properties.

  7. Potential for joint implementation (activities implemented jointly in Kenya)

    Energy Technology Data Exchange (ETDEWEB)

    Mwandoto, Stephen H. [Kenya Meteorological Department, Nairobi (Kenya)

    1999-07-01

    Kenya has ratified the United Framework Convention for Climate Change (UNFCCC) which entered into force on March 21st 1994 and therefore the country is free to participate in Joint Implementation (AIJ) projects. All development projects, activities and services utilise natural resources in one form or another. The technology used in the local industry therefore must be made as efficient as possible so as to provide a much higher output of saleable goods and services from the same resource base in order to reduce wastes in the form of pollutants in gaseous, liquids or solid forms. The 8th Kenya National Development Plan, the 1996 Sessional Paper on Industrialisation, the National Environmental Action Plan and the draft National Environmental policy paper have clearly defined the policy initiatives on acquisition of efficient manufacturing production processes to protect the resource base. What is now required is the implementation of those policy initiatives by application of the best available and affordable technology to maximise trade and investments. In this paper, the potential for investments in alternative energy technologies and energy efficiency in Medium and Small Scale enterprises in Kenya is discussed. (Author)

  8. The subtalar joint complex of Australopithecus sediba.

    Science.gov (United States)

    Prang, Thomas C

    2016-01-01

    The hominin talus has figured prominently in previous studies of the functional morphology of the talocrural joint, but the talocalcaneal and talonavicular joints have received comparatively less attention despite their functional importance as components of the subtalar joint complex. An associated complete talus and calcaneus attributed to the Malapa Hominin 2 (MH2) individual of Australopithecus sediba offers the opportunity to evaluate the subtalar joint complex in an early hominin. Furthermore, detailed morphological comparisons of A. sediba to other fossil hominins such as Australopithecus africanus have not yet been conducted. Here I quantify joint curvatures and angular measurements among extant hominoids and fossil hominins to evaluate the functional morphology of the subtalar joint complex of A. sediba. Australopithecus sediba uniquely combines talocalcaneal joint morphology indicative of mobility with specializations of the talonavicular joint that provide medial midtarsal stabilization. Multivariate analyses of talus and calcaneus variables show that A. sediba is most similar to extant gorillas in the morphology of the subtalar joint complex. In contrast, other hominins, such as OH 8, are more similar to modern humans. The morphological similarity between MH2 (U.W. 88-98/99) and specimens from Sterkfontein, Member 4 (StW 88, StW 102, StW 352) in morphologies of the talonavicular and talocalcaneal joints suggests that A. sediba may have possessed a foot that was functionally similar to that of A. africanus. This combination of morphologies in the A. sediba foot is probably derived among hominins and suggests that arboreality may have been adaptively significant for southern African Australopithecus. PMID:26767963

  9. Impact extractive fracture of jointed steel plates of a bolted joint

    Directory of Open Access Journals (Sweden)

    Ambarita H.

    2012-08-01

    Full Text Available This study is concerned with the development of a fracture criterion for the impact fracture of jointed steel plates of a bolted joint used in a car body. For the accurate prediction of crash characteristics of car bodies by computer-aided engineering (CAE, it is also necessary to examine the behavior and fracture of jointed steel plates subjected to impact loads. Although the actual impact fracture of jointed steel plates of a bolted joint used in cars is complicated, for simplifying the problem it might be classified into the shear fracture and the extractive fracture of jointed steel plates. Attention is given to the extractive fracture of jointed steel plates in this study. The extractive behavior and fracture of three kinds of steel plates used for cars are examined in experiments and numerical simulations. The impact extraction test of steel plates jointed by a bolt is performed using the one-bar method, together with the static test. In order to understand the mechanism of extractive fracture process of jointed steel plates, numerical simulations by a FEM code LS-DYNA are also carried out. The obtained results suggest that a stress-based fracture criterion may be developed for the impact extractive fracture of jointed steel plates of a bolted joint used in a car body.

  10. Magnetic suspension hip joint: an ideal design of an artificial joint

    Institute of Scientific and Technical Information of China (English)

    DAI Min; NIE Tao

    2010-01-01

    Background Artificial joints present certain problems such as osteal absorption and lysis induced by wear debris which leads to loosening of the prosthesis over a period of time. Here we propose a design of an artificial magnetic suspension joint that was prepared by integrating the medical theories of modern material science, magnetism, and medical physics.Methods According to clinical characteristic of biological and mechanical for hip joint, we designed the appearance and dimensions of magnetic suspension joint and placed neodymium-iron-boron permanent magnets in the prosthesis.As the same time, we performed mechanical and biological experiments using artificial magnetic suspension hip joints models.Results By simulated the human hip structure and the external load, we discovered the artificial magnetic suspension hip joints models had much lesser amount and size of wear debris than the ceramic/ceramic artificial hip joint prosthesis in friction wear tests. The force between the artificial joints with magnetic materials that we have calculated is feasible for application of artificial joint. The design of artificial magnetic suspension hip joints models was plausible technically and safe biologically.Conclusion Artificial magnetic suspension hip joints may effectively reduce the incidence of the loosening of prosthesis over a period of time.

  11. MR assessment of distribution and amount of joint effusion in patients with traumatic knee joint disorders

    International Nuclear Information System (INIS)

    To clarify the distribution of joint effusion, and the relationship between type of injury and amount of joint effusion seen in traumatic knee joint magnetic resonance imaging (MRI). We retrospectively reviewed the MR images of 400 patients with traumatic knee joint effusion. The knee joint space was divided into four compartments : central portion (para-ACL, para-PCL), suprapatellar pouch, posterior femoral recess, and subpopliteal recess, and we then compared the amount and distribution of effusion. For statistical analysis, the chi-square test was used. Among 400 MRI examinations of joint effusion, 383 knees (96%) showed homogeneous low intensity on T1-weighted images, and - except for ten cases of fluid-fluid levels- homogeneous high intensity on T2-weighted images. Knee joint effusion was clearly shown to be distributed mainly in the suprapatellar pouch (345, 86%), followed by the central posterior femoral recess, and the subpopliteal recess (P<0.001). Extensive joint effusion was less frequently found in the normal group, but was occasionally found in the combined injury group (P<0.001). The relationship between amount of joint effusion and type of injury was statistically significant (P<0.001), except in the case of medial and lateral collateral ligament injury. The distribution of joint effusion in patients with traumatic knee disorders is a reflection of anatomic communication, and whether the amount of joint effusion was small or large depended on the anatomical location and type of injury

  12. Joint shear strength of FRP reinforced concrete beam-column joints

    Science.gov (United States)

    Saravanan, Jagadeesan; Kumaran, Ganapathy

    2011-03-01

    An assessment of the joint shear strength of exterior concrete beam-column joints reinforced internally with Glass Fibre Reinforced Polymer (GFRP) reinforcements under monotonically increasing load on beams keeping constant load on columns is carried out in this study. Totally eighteen numbers of specimens are cast and tested for different parametric conditions like beam longitudinal reinforcement ratio, concrete strength, column reinforcement ratio, joint aspect ratio and influence of the joint stirrups at the joint. Also finite element analysis is performed to simulate the behaviour of the beam-column joints under various parametric conditions. Based on this study, a modified design equation is proposed for assessing the joint shear strength of the GFRP reinforced beam-column specimens based on the experimental results and the review of the prevailing design equations.

  13. Evaluation of Truview evo2® Laryngoscope In Anticipated Difficult Intubation-A Comparison To Macintosh Laryngoscope

    Directory of Open Access Journals (Sweden)

    Ishwar Singh

    2009-01-01

    Full Text Available The aim of the study was to assess and compare laryngoscopic view of Truview evo2 laryngoscope with that of Macintosh laryngoscope in patients with one or more predictors of difficult intubation (PDI. Moreover ease of intubation with Truview evo2 in terms of absolute time requirement was also aimed at. Patients for elective surgery requiring endotracheal intubation were initially assessed for three PDI parameters - modified Mallampati test, thyro-mental distance& Atlanto-occipital (AO joint extension. Patients with cumulative PDI scores of 2 to 5 (in a scale of 0 to 8 were evaluated for Cormack& Lehane (CL grading by Macintosh blade after standard induction. Cases with CL grade of two or more were further evaluated by Truview evo2 laryngoscope and corresponding CL grades were assigned. Intubation attempted under Truview evo2 vision and time required for each successful tracheal intubation (i.e. tracheal intubation completed within one minute was noted. Total fifty cases were studied. The CL grades assigned by Macintosh blade correlated well with the cumulative PDI scores assigned preoperatively, confirming there predictability. Truview evo2 improved laryngeal view in 92 % cases by one or more CL grade. Intubation with Truview evo2 was possible in 88% cases within stipulated time of one minute and mean time of 28.6 seconds with SD of 11.23 was reasonably quick. No significant complication like oro- pharyngeal trauma or extreme pressor response to laryngoscopy was noticed. To conclude, Truview evo2 proved to be a better tool than conventional laryngoscope in anticipated difficult situations.

  14. A paradigm for human body finite element model integration from a set of regional models.

    Science.gov (United States)

    Thompson, A B; Gayzik, F S; Moreno, D P; Rhyne, A C; Vavalle, N A; Stitzel, J D

    2012-01-01

    Computational modeling offers versatility, scalability, and cost advantages to researchers in the trauma and injury biomechanics communities. The Global Human Body Models Consortium (GHBMC) is a group of government, industry, and academic researchers developing human body models (HBMs) that aim to become the standard tool to meet this growing research need. The objective of this study is to present the methods used to develop the average seated male occupant model (M50, weight = 78 kg, height = 175 cm) from five separately validated body region models (BRMs). BRMs include the head, neck, thorax, abdomen, and a combined pelvis and lower extremity model. Modeling domains were split at the atlanto-occipital joint, C7-T1 boundary, diaphragm, abdominal cavity (peritoneum/retroperitoneum), and the acetabulum respectively. BRM meshes are based on a custom CAD model of the seated male built from a multi-modality imaging protocol of a volunteer subject found in literature.[1] Various meshing techniques were used to integrate the full body model (FBM) including 1-D beam and discrete element connections (e.g. ligamentous structures), 2D shell nodal connections (e.g. inferior vena cava to right atrium), 3D hexahedral nodal connections (e.g. soft tissue envelope connections between regions), and contact definitions varying from tied (muscle insertions) to sliding (liver and diaphragm contact). The model was developed in a general-purpose finite element code, LS-Dyna (LTSC, Livermore, CA) R4.2.1., and consists of 1.95 million elements and 1.3 million nodes. The element breakdown by type is 41% hexahedral, 33.7% tetrahedral, 19.5% quad shells and 5% tria shell. The integration methodology presented highlights the viability of using a collaborative development paradigm for the construction of HBMs, and will be used as template for expanding the suite of GHBMC models. PMID:22846315

  15. Gulf Canada's Russian joint venture

    International Nuclear Information System (INIS)

    After three years of evaluating prospects and negotiating with government and industry representatives, Gulf Canada established its first joint venture in the Russian Federation with Komineft, a production association from the Komi autonomous republic. Komineft has a 50% share of the venture, and the rest is shared equally between Gulf and British Gas. The operating area is at the Vozey and Upper Vozey fields in the Timan-Pechora Basin, some 1,500 km northeast of Moscow just inside the Arctic Circle. An attractive feature of the Upper Vozey project is low development costs of ca $2/bbl. In the Vozey field, the venture will set up an enhanced oil recovery demonstration project to test techniques perfected in Alberta. About 60 Canadians are involved on the project, and headquarters are in Usinsk, ca 100 km south of the oil fields. In the first half of 1992, oil production in the first phase of the venture averaged around 10,000 bbl/d and continues to increase

  16. The Joint COntrols Project Framework

    CERN Document Server

    González-Berges, M

    2003-01-01

    The Framework is one of the subprojects of the Joint COntrols Project (JCOP), which is collaboration between the four LHC experiments and CERN. By sharing development, this will reduce the overall effort required to build and maintain the experiment control systems. As such, the main aim of the Framework is to deliver a common set of software components, tools and guidelines that can be used by the four LHC experiments to build their control systems. Although commercial components are used wherever possible, further added value is obtained by customisation for HEP-specific applications. The supervisory layer of the Framework is based on the SCADA tool PVSS, which was selected after a detailed evaluation. This is integrated with the front-end layer via both OPC (OLE for Process Control), an industrial standard, and the CERN-developed DIM (Distributed Information Management System) protocol. Several components are already in production and being used by running fixed-target experiments at CERN as well as for th...

  17. Aksa plans polypropylene joint venture

    International Nuclear Information System (INIS)

    Turkish acrylic fiber maker Aksa (Yalova), part of the Akkok textile conglomerate, is studying construction of a world-scale polypropylene (PP) plant as part of its diversification plans. The company says it is engaged in discussions with three 'multinations in the PP business' on the possibility of a joint venture. One of the firms is understood to be Amoco. Aksa is looking at three possible locations for the 100,000 m.t.-150,000 m.t./year plant: Yalova, near Istanbul, where its existing plants are located; Zonguldak, on the Black Sea coast; and within one of the existing complexes or a new site belonging to state-owned Petkim. Aksa has not yet discussed that option with Petkim, which recently received approval to build a $2.5-billion petrochemical complex. The Aksa PP plant would cost about $100 million and would use propylene from world markets. The onstream date depends on Aksa's ability to link up with a foreign partner, but it hopes to complete the unit within three years. Turkey has only one PP plant, a 65,000-m.t./year Petkim unit at Aliaga. The domestic market is currently two to three times that amount and is growing. Petkim also plans a 200,000-m.t./year PP plant as part of its new complex

  18. Progressive Damage Analysis of Bonded Composite Joints

    Science.gov (United States)

    Leone, Frank A., Jr.; Girolamo, Donato; Davila, Carlos G.

    2012-01-01

    The present work is related to the development and application of progressive damage modeling techniques to bonded joint technology. The joint designs studied in this work include a conventional composite splice joint and a NASA-patented durable redundant joint. Both designs involve honeycomb sandwich structures with carbon/epoxy facesheets joined using adhesively bonded doublers.Progressive damage modeling allows for the prediction of the initiation and evolution of damage within a structure. For structures that include multiple material systems, such as the joint designs under consideration, the number of potential failure mechanisms that must be accounted for drastically increases the complexity of the analyses. Potential failure mechanisms include fiber fracture, intraply matrix cracking, delamination, core crushing, adhesive failure, and their interactions. The bonded joints were modeled using highly parametric, explicitly solved finite element models, with damage modeling implemented via custom user-written subroutines. Each ply was discretely meshed using three-dimensional solid elements. Layers of cohesive elements were included between each ply to account for the possibility of delaminations and were used to model the adhesive layers forming the joint. Good correlation with experimental results was achieved both in terms of load-displacement history and the predicted failure mechanism(s).

  19. MANAGEMENT OF JOINT DISORDERS BY KSHEERAVASTI

    Directory of Open Access Journals (Sweden)

    Shingade Vijay P.

    2011-02-01

    Full Text Available Now a days joint disorders are the most commonly occuring in the world. Sandhigata Vata, Vata rakta, Amavata are the common joint disorders. In dhatukshayajanya sandhigata vata and vata rakta, ksheera vasti is helpful. Common symptoms of joint disorders are: Asthishoola, Sandhishoola, Sandhisodha, restriction of movements, pain on movement. Though there are several joint disorders, majority of joint disorders are due to vitiation of vata dosha. Hence, vasti is considered as the main treatment for vata dosha. Specially in dhatukshayajanya conditions, vasti with medicated milk is very useful. Cow milk is the best among all milks. It has same properties like ojas, thus increases ojas. Ksheera is considered as the best in nourishing the asthi dhatu because of its tulyaguna, thus controls the vata dosha. Milk has Snigdha, guru, bahala properties which are similar to that of asthidhatu (tulyaguna. Thus, it counters the rukshatwa and sclerosing effects of bone and increases the unctousness of joint. It also nourishes the asthidhatu and prevents the bone from osteoporosis. Most joint disorders are due to deficiency of calcium content of bone tissue. Milk contains calcium. So, by giving Ksheera vasti calcium content of bone can be increased. Milk contains almost all minerals needed by the body, Such as Ca, P, Na, K, Mg, Cu, I, Cobalt etc, but particularly it is rich in Ca.

  20. Flexible joints in structural and multibody dynamics

    Directory of Open Access Journals (Sweden)

    O. A. Bauchau

    2013-02-01

    Full Text Available Flexible joints, sometimes called bushing elements or force elements, are found in all structural and multibody dynamics codes. In their simplest form, flexible joints simply consist of sets of three linear and three torsional springs placed between two nodes of the model. For infinitesimal deformations, the selection of the lumped spring constants is an easy task, which can be based on a numerical simulation of the joint or on experimental measurements. If the joint undergoes finite deformations, identification of its stiffness characteristics is not so simple, specially if the joint is itself a complex system. When finite deformations occur, the definition of deformation measures becomes a critical issue. This paper proposes a family of tensorial deformation measures suitable for elastic bodies of finite dimension. These families are generated by two parameters that can be used to modify the constitutive behavior of the joint, while maintaining the tensorial nature of the deformation measures. Numerical results demonstrate the objectivity of the deformations measures, a feature that is not shared by the deformations measures presently used in the literature. The impact of the choice of the two parameters on the constitutive behavior of the flexible joint is also investigated.

  1. Versican Expression during Synovial Joint Morphogenesis

    Directory of Open Access Journals (Sweden)

    John B. Shepard, Heidi A. Krug, Brooklynn A. LaFoon, Stanley Hoffman, Anthony A. Capehart

    2007-01-01

    Full Text Available The extracellular matrix (ECM plays a critical role in governing cell behavior and phenotype during limb skeletogenesis. Chondroitin sulfate proteoglycans (Cspgs are highly expressed in the ECM of precartilage mesenchymal condensations and are important to limb chondrogenesis and cartilage structure, but little is known regarding their involvement in formation of synovial joints in the embryonic limb. Matrix versican Cspg expression has previously been reported in the epiphysis of developing long bones and presumptive joint; however, detailed analysis has not yet been conducted. In the present study we immunolocalized versican and aggrecan Cspgs during chick elbow joint morphogenesis between HH st25-41 of development. In this study we show that versican and aggrecan expression initially overlapped in the incipient cartilage model of long bones in the wing, but versican was also highly expressed in the perichondrium and presumptive joint interzone during early stages of morphogenesis (HH st25-34. By HH st36-41 versican localization was restricted to the future articular surfaces of the developing joint and surrounding joint capsule while aggrecan localized in an immediately adjacent and predominately non-overlapping region of chondrogenic cells at the epiphyses. These results suggest a potential role for versican proteoglycan in development and maintenance of the synovial joint interzone.

  2. Real-time visualization of joint cavitation.

    Directory of Open Access Journals (Sweden)

    Gregory N Kawchuk

    Full Text Available Cracking sounds emitted from human synovial joints have been attributed historically to the sudden collapse of a cavitation bubble formed as articular surfaces are separated. Unfortunately, bubble collapse as the source of joint cracking is inconsistent with many physical phenomena that define the joint cracking phenomenon. Here we present direct evidence from real-time magnetic resonance imaging that the mechanism of joint cracking is related to cavity formation rather than bubble collapse. In this study, ten metacarpophalangeal joints were studied by inserting the finger of interest into a flexible tube tightened around a length of cable used to provide long-axis traction. Before and after traction, static 3D T1-weighted magnetic resonance images were acquired. During traction, rapid cine magnetic resonance images were obtained from the joint midline at a rate of 3.2 frames per second until the cracking event occurred. As traction forces increased, real-time cine magnetic resonance imaging demonstrated rapid cavity inception at the time of joint separation and sound production after which the resulting cavity remained visible. Our results offer direct experimental evidence that joint cracking is associated with cavity inception rather than collapse of a pre-existing bubble. These observations are consistent with tribonucleation, a known process where opposing surfaces resist separation until a critical point where they then separate rapidly creating sustained gas cavities. Observed previously in vitro, this is the first in-vivo macroscopic demonstration of tribonucleation and as such, provides a new theoretical framework to investigate health outcomes associated with joint cracking.

  3. Knee joint vibroarthrographic signal processing and analysis

    CERN Document Server

    Wu, Yunfeng

    2015-01-01

    This book presents the cutting-edge technologies of knee joint vibroarthrographic signal analysis for the screening and detection of knee joint injuries. It describes a number of effective computer-aided methods for analysis of the nonlinear and nonstationary biomedical signals generated by complex physiological mechanics. This book also introduces several popular machine learning and pattern recognition algorithms for biomedical signal classifications. The book is well-suited for all researchers looking to better understand knee joint biomechanics and the advanced technology for vibration arthrometry. Dr. Yunfeng Wu is an Associate Professor at the School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China.

  4. Joint hypermobility and fibromyalgia in schoolchildren.

    OpenAIRE

    Gedalia, A; Press, J.; Klein, M.; Buskila, D.

    1993-01-01

    OBJECTIVES--To test the hypothesis that joint hypermobility may play a part in the pathogenesis of pain in fibromyalgia, schoolchildren were examined for the coexistence of joint hypermobility and fibromyalgia. METHODS--The study group consisted of 338 children (179 boys, 159 girls; mean age 11.5 years, range 9-15 years) from one public school in Beer-Sheva, Israel. In the assessment of joint hypermobility, the criteria devised by Carter and Bird were used. Any child who met at least three of...

  5. Traumatic injuries of the temporomandibular joint

    International Nuclear Information System (INIS)

    Injuries of the temporomandibular joint are mostly due to injuries or fractures of the mandibular condyle. Fractures of the skull base involving the temporomandibular joint are rare. Classification of fractures refers to their anatomical positions and the presence or absence of a luxation. Further, it is important whether the fracture is intra- or extra-capsular. The primary imaging method should be orthopantomography. As for therapy planning, especially surgery, also evaluation of soft tissue is necessary, computed tomography is the imaging method of choice. For diagnosis of complications or internal derangement of the temporomandibular joint, magnetic resonance imaging is to be recommended. (orig.)

  6. Uncertainty reconciles complementarity with joint measurability

    International Nuclear Information System (INIS)

    The fundamental principles of complementarity and uncertainty are shown to be related to the possibility of joint unsharp measurements of pairs of noncommuting quantum observables. A joint measurement scheme for complementary observables is proposed. The measured observables are represented as positive operator valued measures (POVMs), whose intrinsic fuzziness parameters are found to satisfy an intriguing pay-off relation reflecting the complementarity. At the same time, this relation represents an instance of a Heisenberg uncertainty relation for measurement imprecisions. A model-independent consideration shows that this uncertainty relation is logically connected with the joint measurability of the POVMs in question

  7. Radiodiagnostics of the temporomandibular joint of disorders

    International Nuclear Information System (INIS)

    Temporomandibularis disorders have a multifactorial etiology with very variable clinical symptoms. On the X-ray image can see the configuration of the joint structures correctly or TMJ disorders ( luxation, subluxation, arthrosis). (authors)

  8. Structural dynamic analysis of a ball joint

    Science.gov (United States)

    Hwang, Seok-Cheol; Lee, Kwon-Hee

    2012-11-01

    Ball joint is a rotating and swiveling element that is typically installed at the interface between two parts. In an automobile, the ball joint is the component that connects the control arms to the steering knuckle. The ball joint can also be installed in linkage systems for motion control applications. This paper describes the simulation strategy for a ball joint analysis, considering manufacturing process. Its manufacturing process can be divided into plugging and spinning. Then, the interested responses is selected as the stress distribution generated between its ball and bearing. In this paper, a commercial code of NX DAFUL using an implicit integration method is introduced to calculate the response. In addition, the gap analysis is performed to investigate the fitness, focusing on the response of the displacement of a ball stud. Also, the optimum design is suggested through case studies.

  9. Elbow joint instability: A kinematic model.

    Science.gov (United States)

    Olsen, B S; Henriksen, M G; Søjbjerg, J O; Helmig, P; Sneppen, O

    1994-05-01

    The effect of simultaneous ulnar and radial collateral ligament division on the kinematics of the elbow joint is studied in a cadaveric model. Severance of the anterior part of the ulnar collateral ligament and the annular ligament led to significant elbow joint instability in valgus and varus stress and in forced external and internal rotation. The mean maximum laxity in valgus stress and forced external rotation were 5.7° and 13.2°. The forearms of the elbow joint specimens were transfixed in maximum pronation. During valgus and varus stress the corresponding spontaneous ulnar rotation of the specimens was recorded. The reproducibility of the instability pattern suggests that this model is suitable for evaluating stabilizing procedures aimed at correction of elbow joint instability before these procedures are introduced into patient care. PMID:22959690

  10. Joint Typhoon Warning Center (JTWC) Storm Wallets

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Joint Typhoon Warning Center (JTWC) is responsible for typhoon forecasts and warnings for the Western Pacific and Indian Ocean basins. After each storm, the...

  11. Nano-Engineered Structural Joints Project

    Data.gov (United States)

    National Aeronautics and Space Administration — A versatile class of high-performance structural joints is proposed where massive interatomic bonds over the large surface areas of nanostructured surfaces...

  12. Joint-venture Insurance Firm Born

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    @@ Generali China Life insurance Company Ltd.began operations in February this year in Guangzhou,capital of South China's Guangdong Province - the first joint-venture insurer since China joined the World Trade Organization.

  13. Bones, Muscles, and Joints: The Musculoskeletal System

    Science.gov (United States)

    ... Story" 5 Things to Know About Zika & Pregnancy Bones, Muscles, and Joints KidsHealth > For Parents > Bones, Muscles, ... able to stand, walk, run, or even sit. Bones and What They Do From our head to ...

  14. Joint action without and beyond planning

    DEFF Research Database (Denmark)

    Blomberg, Olle

    2013-01-01

    Leading philosophical accounts of joint activity, such as Michael Bratman’s account of ‘shared intentional activity’, take joint activity to be the outcome of two or more agents having a ‘shared intention’, where this is a certain pattern of mutually known prior intentions (plans) that are directed...... toward a common goal. With Bratman’s account as a foil, I address two lacunas that are relatively unexplored in the philosophical literature. The first lacuna concerns how to make sense of the apparently joint cooperative activities of agents that lack the capacities for planning and “mindreading” that...... “online”—that is, during action execution as a joint activity unfolds—without recourse to plans that specify in advance what they should do (consider the coordination involved when two friends meet and do a “high five”). Chapters 2 and 3 focus on the first lacuna, while chapters 4 and 5 focus on the...

  15. Migratory Bird Joint Ventures of New Mexico

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — A joint venture is a self-directed partnership of agencies, organizations, corporations, tribes, or individuals that has formally accepted the responsibility of...

  16. Candida infection of a prosthetic shoulder joint

    International Nuclear Information System (INIS)

    A heroin addict developed a Candida parapsilosis infection in a prosthetic shoulder joint. Radiographs showed loose fragments of cement with prosthetic loosening. The patient was treated with removal of the prosthesis and intravenous amphotericin B followed by oral ketoconazole. (orig.)

  17. Control of compliant anthropomimetic robot joint

    Directory of Open Access Journals (Sweden)

    Svetozarević Bratislav

    2011-01-01

    Full Text Available In this paper we propose a control strategy for a robot joint which fully mimics the typical human joint structure. The joint drive is based on two actuators (dc motors, agonist and antagonist, acting through compliant tendons and forming a nonlinear multi-input multi-output (MIMO system. At any time, we consider one actuator, the puller, as being responsible for motion control, while the role of the other is to keep its tendon force at some appropriate low level. This human-like and energetically efficient approach requires the control of 'switching', or exchanging roles between actuators. Moreover, an algorithm based on adaptive force reference is used to solve a problem of slacken tendons during the switching and to increase the energy efficiency. This approach was developed and evaluated on increasingly complex robot joint configurations, starting with simple and noncompliant system, and finishing with nonlinear and compliant system.

  18. Arthritis Mechanisms May Vary by Joint

    Science.gov (United States)

    ... Kids Become Lifelong Learners Featured Website: GeneEd: Genetics, Education, Discovery Links Rheumatoid Arthritis Osteoarthritis Gout Rheumatoid Arthritis Juvenile Arthritis Feeling Out of Joint: The Aches of Arthritis CONTACT ...

  19. Joint Commission issues staff behavior standard.

    Science.gov (United States)

    2008-09-01

    * Medical literature provides evidence that inappropriate behaviors can cause adverse outcomes. * The Joint Commission wants code of conduct, with consequences for bad behaviors. * Quality managers should emphasize a pattern of behavior rather than an isolated incident. PMID:18727307

  20. DOE and NASA joint Dark Energy mission

    CERN Multimedia

    2003-01-01

    "DOE and NASA announced their plan for a Joint Dark Energy Mission (JDEM) on October 23, 2003, at the NASA Office of Space Science Structure and Evolution of the Universe Subcommittee (SEUS) meeting" (1 paragraph).

  1. Joint Training of Deep Boltzmann Machines

    OpenAIRE

    Goodfellow, Ian; Courville, Aaron; Bengio, Yoshua

    2012-01-01

    We introduce a new method for training deep Boltzmann machines jointly. Prior methods require an initial learning pass that trains the deep Boltzmann machine greedily, one layer at a time, or do not perform well on classifi- cation tasks.

  2. North American Joint Ventures 2014 revision

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — A joint venture is a self-directed partnership of agencies, organizations, corporations, tribes, or individuals that has formally accepted the responsibility of...

  3. A Joint-Constraint Model for Human Joints using Signed Distance-Fields

    DEFF Research Database (Denmark)

    Engell-Nørregård, Morten Pol; Niebe, Sarah Maria; Erleben, Kenny

    2012-01-01

    We present a local joint-constraint model for a single joint which is based on distance fields. Our model is fast, general, and well suited for modeling human joints. In this work, we take a geometric approach and model the geometry of the boundary of the feasible region, i.e., the boundary of all...... allowed poses. A region of feasible poses can be built by embedding motion captured data points in a signed distance field. The only assumption is that the feasible poses form a single connected set of angular values. We show how signed distance fields can be used to generate fast and general joint......-constraint models for kinematic figures. Our model is compared to existing joint-constraint models, both in terms of generality and computational cost. The presented method supports joint-constraints of up to three degrees of freedom and works well with sampled motion data. Our model can be extended to handle inter...

  4. Torque Sensors for Robot Joint Control

    OpenAIRE

    Tsetserukou, Dzmitry; Tachi, Susumu

    2008-01-01

    In Chapter, the stages of the joint torque sensor design are presented. New torque sensors for implementation of virtual backdrivability of robot joint transmissions have been developed. Torque measurement techniques, namely, electrical, electromagnetic, and optical, are discussed in detail. Technical requirements aimed at designing the highperformance torque sensor for humanoid robot arm were formulated. The substantial advantages of the optical technique motivated our choice in its favor. T...

  5. Predisposition for temporomandibular joint disorders: loose ligaments.

    Science.gov (United States)

    Deodato, Francesco; Trusendi, Raffaello; Giorgetti, Roberto; Scalese, Marco U

    2006-07-01

    Loose ligaments are often a predisposing factor of temporomandibular joint (TMJ) disorders. This causal factor was analyzed in 701 subjects presenting at the TMJ and Posture Center of Siena University with TMJ pain or dysfunction. Along with the conventional jaw examination, a Carter and Wilkinson test as modified by Beighton was also done. We found a correlation among the parameters of age, gender, TMJ disorder, joint pain, muscle pain, and loose ligaments. PMID:16933458

  6. Joint IGORR 2013 and IAEA Technology Meeting

    International Nuclear Information System (INIS)

    This Joint Meeting contains articles of Joint IGORR 2013 and IAEA Technology Meeting. It was held on Oct 13-18, 2013 in Daejeon, Korea. The main topics are as follows: Opening session, Ageing, International topics, Safety of research reactor, Irradiation technology, Utilization of research reactors, New research reactor project, Fuel, Secondary source, Innovative methods, NDT and RI, Operation and maintenance and so on. (Yi, J. H.)

  7. Interventional radiology in bone and joint

    Energy Technology Data Exchange (ETDEWEB)

    Bard, M.; Laredo, J.D.

    1988-01-01

    Recent radiologic procedures in bone and joints, some of which eliminate the need for surgery are exposed, including: trephine biopsies of the thoracic and lumbar spine, sacro-iliac joints, peripheral bones synovial membrane and soft tissues, using either fluoroscopic echographic or CT guidance - chemonucleolysis - vascular embolization of skeletal tumors and management of vertebral hemangiomas - selective steroid injection in a broad spectrum of diseases including vertebral facet syndrome, cervicobrachial nerve root pain, rotator cuff calcium deposit, bone cysts.

  8. Septic arthritis of a lumbar facet joint

    International Nuclear Information System (INIS)

    Septic arthritis of the posterior lumbar joints is extremely rare. The clinical picture of the unusual site of infection can easily lead to confusion with spondylo-discitis which is more common. We report a case of a 50-year-old women with Staphylococcus aureus septic arthritis of the left L5-S1 lumbar facet joint. CT scan was helpful to establish the diagnosis and to guide the percutaneous needle biopsy. (authors)

  9. Monarticular involvement of the manubriosternal joint

    Energy Technology Data Exchange (ETDEWEB)

    Jurik, A.G.; Graudal, H.; Carvalho, A. de

    1985-07-01

    Four females and two males with seronegative monoarthritis of the manubriosternal joint are reported. Two patients had pustulosis palmoplantaris, one psoriasis vulgaris, and one HLA-B27. The arthritis is considered to be a monarticular manifestation of seronegative spondylarthritis. Two patients had no other diseases or signs. Four patients were followed for a mean of 8.5 years (range 2-16 years) during which time affection of other joints or the spine was not seen.

  10. Wormhole Formation in RSRM Nozzle Joint Backfill

    Science.gov (United States)

    Stevens, J.

    2000-01-01

    The RSRM nozzle uses a barrier of RTV rubber upstream of the nozzle O-ring seals. Post flight inspection of the RSRM nozzle continues to reveal occurrence of "wormholes" into the RTV backfill. The term "wormholes", sometimes called "gas paths", indicates a gas flow path not caused by pre-existing voids, but by a little-understood internal failure mode of the material during motor operation. Fundamental understanding of the mechanics of the RSRM nozzle joints during motor operation, nonlinear viscoelastic characterization of the RTV backfill material, identification of the conditions that predispose the RTV to form wormholes, and screening of candidate replacement materials is being pursued by a joint effort between Thiokol Propulsion, NASA, and the Army Propulsion & Structures Directorate at Redstone Arsenal. The performance of the RTV backfill in the joint is controlled by the joint environment. Joint movement, which applies a tension and shear load on the material, coupled with the introduction of high pressure gas in combination create an environment that exceeds the capability of the material to withstand the wormhole effect. Little data exists to evaluate why the material fails under the modeled joint conditions, so an effort to characterize and evaluate the material under these conditions was undertaken. Viscoelastic property data from characterization testing will anchor structural analysis models. Data over a range of temperatures, environmental pressures, and strain rates was used to develop a nonlinear viscoelastic model to predict material performance, develop criteria for replacement materials, and quantify material properties influencing wormhole growth. Three joint simulation analogs were developed to analyze and validate joint thermal barrier (backfill) material performance. Two exploratory tests focus on detection of wormhole failure under specific motor operating conditions. A "validation" test system provides data to "validate" computer models and

  11. ELECTRICAL JOINTS FOR THE EUROPEAN LCT COIL

    OpenAIRE

    Albrecht, C.; Marsing, H.; Neumüller, H.

    1984-01-01

    A description is given of a solder-press joint of segmented design for. Tesla, as well as of inductive measuring apparatus. One 4-segment unit in length and exhibits an electrical resistance of 2.3 . 10-10 Ω at 1 T. Resistance of a prototype joint was measured up to 5 T. Thermal cycles between 77 K and 300 K did not affect the resistance. Reproducibility of fabrication has been proved.

  12. Optimal Ownership Structures in Asymmetric Joint Ventures

    OpenAIRE

    Paul Belleflamme; Francis Bloch

    2000-01-01

    This paper investigates the relation between asymmetries in the distribution of shares in joint ventures and asymmetries between the parent companies. When the joint venture and the parent companies are controlled by separate entities, we provide a simple formula to compute the optimal ownership structure. This formula is applied to various models of market interaction, showing that larger companies should have a larger fraction of shares, and so should companies whose goods are closer substi...

  13. Attention, Joint Attention, and Social Cognition

    OpenAIRE

    Mundy, Peter; Newell, Lisa

    2007-01-01

    Before social cognition there is joint processing of information about the attention of self and others. This joint attention requires the integrated activation of a distributed cortical network involving the anterior and posterior attention systems. In infancy, practice with the integrated activation of this distributed attention network is a major contributor to the development of social cognition. Thus, the functional neuroanatomies of social cognition and the anterior–posterior attention ...

  14. Joint hypermobility: incidence and some clinical symptoms

    OpenAIRE

    M P Isaev

    2003-01-01

    Objective. To study joint mobility range among urban population aged 18 to 30 years and to assess association of joint and other connective tissue structures disorders clinical signs with hypermobility. Material and methods. 769 randomly selected individuals aged 18 to 30 (mean - 25,56) years (419 female and 350 male) were examined. Hypermobility was assessed with 9-point Beighton scale. Examination included skin stretchability evaluation at elbow back surface, determination of flat feet, hig...

  15. Bundling and joint marketing by rival firms

    OpenAIRE

    Jeitschko, Thomas D.; Jung, Yeonjei; Kim, Jaesoo

    2014-01-01

    We study joint marketing arrangements by competing firms who engage in price discrimination between consumers who patronize only one firm (single purchasing) and those who purchase from both competitors (bundle purchasers). Two types of joint marketing are considered. Firms either commit to a component-price that applies to bundle-purchasers and then firms set stand-alone prices for single purchasers; or firms commit to a rebate off their stand alone price that will be applied to bundle-purch...

  16. Osteoligamentous injuries of the medial ankle joint

    OpenAIRE

    Lötscher, P.; Lang, T. H.; Zwicky, L.; Hintermann, B; Knupp, M

    2015-01-01

    Injuries of the ankle joint have a high incidence in daily life and sports, thus, playing an important socioeconomic role. Therefore, proper diagnosis and adequate treatment are mandatory. While most of the ligament injuries around the ankle joint are treated conservatively, great controversy exists on how to treat deltoid ligament injuries in ankle fractures. Missed injuries and inadequate treatment of the medial ankle lead to inferior outcome with instability, progressive deformity, and ank...

  17. Monarticular involvement of the manubriosternal joint

    International Nuclear Information System (INIS)

    Four females and two males with seronegative monoarthritis of the manubriosternal joint are reported. Two patients had pustulosis palmoplantaris, one psoriasis vulgaris, and one HLA-B27. The arthritis is considered to be a monarticular manifestation of seronegative spondylarthritis. Two patients had no other diseases or signs. Four patients were followed for a mean of 8.5 years (range 2-16 years) during which time affection of other joints or the spine was not seen. (orig.)

  18. Kinematics of Hooke universal joint robot wrists

    Science.gov (United States)

    Mckinney, William S., Jr.

    1988-01-01

    The singularity problem associated with wrist mechanisms commonly found on industrial manipulators can be alleviated by redesigning the wrist so that it functions as a three-axis gimbal system. This paper discussess the kinematics of gimbal robot wrists made of one and two Hooke universal joints. Derivations of the resolved rate motion control equations for the single and double Hooke universal joint wrists are presented using the three-axis gimbal system as a theoretical wrist model.

  19. The synovial joint: a perfect tribological system

    OpenAIRE

    Noble, Prisca; Collin, Bernard; Lecomte-Beckers, Jacqueline; Magnée, Adrien; Denoix, Jean-Marie; Serteyn, Didier

    2010-01-01

    The synovial joint, by load bearing and by minimal wear and minimal friction conferring, is considered as a perfect tribological system. During these last years, researchs in articular biomechanics have been performed to study how the joint friction coefficient, a dimensionless measure which represents the ratio between the frictional force on the normal force, was close to zero. Today, there is still no consensual explanation and the articular prosthesis partially imitates the biological me...

  20. Expression of CGRP in the temporomandibular joint

    International Nuclear Information System (INIS)

    The presence and content of calcitonin gene-related peptide (CGRP) is evaluated in the hyperplastic retrodiscal tissue of the temporomandibular joint in patients with joint degenerative disease by radioimmunoassay. Study population has included 8 female patients in pre-menopausic status, without to be pregnant, without to be lactating for a year and with diagnostic of joint degenerative disease (osteoarthrosis). Pain levels are registered with visual analog scale, where 0 is absence of pain and 16 acute pain. A bone degeneration is classified as mild, moderate and severe, according to findings of nuclear magnetic resonance. The 15 retrodiscal hyperplastic tissue samples are taken from patients undergoing to open surgery of temporomandibular joint. The specimens were placed in plastic blocks with freezing medium and are stored at -70 degrees celsius until neuropeptide extraction by radioimmunoassay with kit for CGRP. A directly proportional relationship is established between the degree of bone degeneration and neuropeptide expression and between the osteoarthrosis classification with analogue visual scale. Findings have shown definitive correlation between pain levels and expression of neuropeptide. CGRP is expressed in the retrodiscal tissue of temporomandibular joint in human with joint degenerative disease and is directly related with levels osteoarthrosis and pain

  1. Joint attention, shared goals, and social bonding.

    Science.gov (United States)

    Wolf, Wouter; Launay, Jacques; Dunbar, Robin I M

    2016-05-01

    There has recently been interest in the ways in which coordinated movements encourage coactors to feel socially closer to one another, but this has generally overlooked the importance of necessary precursors to this joint action. Here we target two low-level behaviours involved in social coordination that may mediate a relationship between joint actions and social bonding, namely joint attention and shared goals. Participants engaged in a simple reaction time task while sitting next to a partner performing the same task. In a joint attention condition, both participants attended to stimuli presented on the same half of a computer screen, while in a control condition, they attended to opposite sides of the computer screen. Shared goals were manipulated by giving participants the instruction to keep below a threshold score for both individual response times and accuracy (individual goal), or their joint mean response time and accuracy (i.e., averaging their mean response time and accuracy with that of their partner: shared goal). Attending to the same side of the screen led to higher ratings on a composite social bonding index directed towards a partner, while shared goals did not cause any effects on partner ratings. Joint attention was sufficient to encourage social closeness with an interaction partner, which suggests that any activities which encourage attending to the same point in space could have some influence on how connected coactors feel about one another. PMID:26256821

  2. Joint hypermobility syndrome and related pain

    Directory of Open Access Journals (Sweden)

    Nilay Sahin

    2016-06-01

    Full Text Available Hypermobility is defined as an abnormally increased range of motion of a joint resulting from the excessive laxity of the soft tissues. This paper is focused on this commonly forgotten cause of several morbidities. The etiology of hypermobility is not very well known. One decade ago, joint hypermobility syndrome was considered as a benign condition, but now it is recognized as a significant contributor to chronic musculoskeletal pain, besides impacting on other organs. Patients with joint hypermobility syndrome often have diffuse, chronic complaints that are inconsistent with the musculoskeletal system. Chronic pain may cause loss of proprioception and so increased sensitivity to microtrauma, premature osteoarthritis de- velopment, soft tissue problems, psychosocial disorders, and neurophysiological deficiencies. Osteoarthritis, pes planus, mechanical low back pain, and soft tissue rheumatisms are frequent musculoskeletal findings as well as subluxations, thoracic outlet syndrome, rectal and uterine prolapses, hernias, and stress incontinence. Joint hypermobility syndrome's treatment is not easy, and nonsteroidal anti-inflammatory drugs are not usually effective or adequate. Proprioceptive and strengthening exercises have been reported to have supportive and therapeutic effects, but we have limited data on this issue. Joint hypermobility syndrome must be accepted as a multisystem connective tissue disorder rather than just joint laxities. As a result; clinicians must be aware of complexities of connective tissue disorders and comorbidities. [Arch Clin Exp Surg 2016; 5(2.000: 105-112

  3. Experimental joint immobilization in guinea pigs. Effects on the knee joint

    Science.gov (United States)

    Marcondesdesouza, J. P.; Machado, F. F.; Sesso, A.; Valeri, V.

    1980-01-01

    In young and adult guinea pigs, the aftermath experimentally induced by the immobilization of the knee joint in hyperextended forced position was studied. Joint immobilization which varied from one to nine weeks was attained by plaster. Eighty knee joints were examined macro and microscopically. Findings included: (1) muscular hypotrophy and joint stiffness in all animals, directly proportional to the length of immobilization; (2) haemoarthrosis in the first week; (3) intra-articular fibrous tissue proliferation ending up with fibrous ankylosis; (4) hyaline articular cartilage erosions; (5) various degrees of destructive menisci changes. A tentative explanation of the fibrous tissue proliferation and of the cartilage changes is offered.

  4. Effect of joint design on ballistic performance of quenched and tempered steel welded joints

    International Nuclear Information System (INIS)

    Highlights: • Traditional usage of austenitic stainless steel filler for armour steel welding shows poor ballistic performance. • Earlier efforts show dubious success on ballistic resistance of armour steel joints. • Comparative evaluation of equal/unequal joint design on ballistic performance. • Effect of joint design covers the main aspects of successful bullet stoppage. - Abstract: A study was carried out to evaluate the effect of joint design on ballistic performance of armour grade quenched and tempered steel welded joints. Equal double Vee and unequal double Vee joint configuration were considered in this study. Targets were fabricated using 4 mm thick tungsten carbide hardfaced middle layer; above and below which austenitic stainless steel layers were deposited on both sides of the hardfaced interlayer in both joint configurations. Shielded metal arc welding process was used to deposit for all layers. The fabricated targets were evaluated for its ballistic performance and the results were compared in terms of depth of penetration on weld metal. From the ballistic test results, it was observed that both the targets successfully stopped the bullet penetration at weld center line. Of the two targets, the target made with unequal double Vee joint configuration offered maximum resistance to the bullet penetration at weld metal location without any bulge at the rear side. The higher volume of austenitic stainless steel front layer and the presence of hardfaced interlayer after some depth of soft austenitic stainless steel front layer is the primary reason for the superior ballistic performance of this joint

  5. 29 CFR 825.106 - Joint employer coverage.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 3 2010-07-01 2010-07-01 false Joint employer coverage. 825.106 Section 825.106 Labor... AND MEDICAL LEAVE ACT OF 1993 Coverage Under the Family and Medical Leave Act § 825.106 Joint employer... employee, the businesses may be joint employers under FMLA. Joint employers may be separate and...

  6. 15 CFR 296.8 - Joint venture agreement.

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Joint venture agreement. 296.8 Section... PROGRAM General § 296.8 Joint venture agreement. NIST shall not issue a TIP award to a joint venture and no costs shall be incurred under a TIP project by the joint venture members until such time as...

  7. Evaluation of temporomandibular joint positions in different malocclusions

    OpenAIRE

    Görücü Coşkuner, Hande; Kocadereli, İlken

    2013-01-01

    Temporomandibular joint is a secondary joint that connects mandible to temporal bone. Conventional radiographic imaging such as panoramic or transcranial radiographs, conventional tomography, magnetic resonance imaging, ultrasonography, artrography or cone beam computed tomography can be used for the evaluation of the temporomandibular joint. Although several studies have been done, relationship between the temporomandibular joint shape and position and occlusion could not be defined clearly,...

  8. Children with generalised joint hypermobility and musculoskeletal complaints

    DEFF Research Database (Denmark)

    Scheper, M C; Engelbert, R H H; Rameckers, E A A;

    2013-01-01

    To provide a state of the art on diagnostics, clinical characteristics, and treatment of paediatric generalised joint hypermobility (GJH) and joint hypermobility syndrome (JHS).......To provide a state of the art on diagnostics, clinical characteristics, and treatment of paediatric generalised joint hypermobility (GJH) and joint hypermobility syndrome (JHS)....

  9. Shear fracture of jointed steel plates of bolted joints under impact load

    Science.gov (United States)

    Daimaruya, M.; Fujiki, H.; Ambarita, H.; Kobayashi, H.; Shin, H.-S.

    2013-07-01

    The present study is concerned with the development of a fracture criterion for the impact fracture of jointed steel plates of bolted joints used in a car body, which contributes to crash simulations by CAE. We focus our attention on the shear fracture of the jointed steel plates of lap-bolted joints in the suspension of a car under impact load. Members of lap-bolted joints are modelled as a pair of steel plates connected by a bolt. One of the plates is a specimen subjected to plastic deformation and fracture and the other is a jig subjected to elastic deformation only. Three kinds of steel plate specimens are examined, i.e., a common steel plate with a tensile strength of 270 MPa and high tensile strength steel plates of 440 and 590 MPa used for cars. The impact shear test was performed using the split Hopkinson bar technique for tension impact, together with the static test using a universal testing machine INSTRON 5586. The behaviour of the shear stress and deformation up to rupture taking place in the joint was discussed. The obtained results suggest that a stress-based fracture criterion may be developed for the impact fracture of jointed steel plates of a lap-bolted joint.

  10. The association between generalized joint hypermobility and temporomandibular joint disorders : A systematic review

    NARCIS (Netherlands)

    Dijkstra, PU; Kropmans, TJB; Stegenga, B

    2002-01-01

    To analyze conflicting evidence in the literature for the association between temporomandibular joint disorders (TMD) and generalized joint hypermobility (GJH), we performed a bibliographic search. The methodological quality of the 14 papers found was assessed according to 14 criteria. Papers were i

  11. Shear fracture of jointed steel plates of bolted joints under impact load

    International Nuclear Information System (INIS)

    The present study is concerned with the development of a fracture criterion for the impact fracture of jointed steel plates of bolted joints used in a car body, which contributes to crash simulations by CAE. We focus our attention on the shear fracture of the jointed steel plates of lap-bolted joints in the suspension of a car under impact load. Members of lap-bolted joints are modelled as a pair of steel plates connected by a bolt. One of the plates is a specimen subjected to plastic deformation and fracture and the other is a jig subjected to elastic deformation only. Three kinds of steel plate specimens are examined, i.e., a common steel plate with a tensile strength of 270 MPa and high tensile strength steel plates of 440 and 590 MPa used for cars. The impact shear test was performed using the split Hopkinson bar technique for tension impact, together with the static test using a universal testing machine INSTRON 5586. The behaviour of the shear stress and deformation up to rupture taking place in the joint was discussed. The obtained results suggest that a stress-based fracture criterion may be developed for the impact fracture of jointed steel plates of a lap-bolted joint

  12. Micromechanics approach to poroelastic behavior of a jointed rock

    OpenAIRE

    Maghous, Samir; Dormieux, Luc; Kondo, Djimédo; SHAO, Jian Fu

    2013-01-01

    The formulation of macroscopic poroelastic behavior of a jointed rock is investigated within the framework of a micro-macro approach. The joints are modeled as interfaces, and their behavior is modeled by means of generalized poroelastic state equations. Starting from Hill's lemma extended for a jointed medium and extending the concept of strain concentration to relate the joint displacement jump to macroscopic strain, the overall poroelastic constitutive equations for the jointed rock are fo...

  13. Improved Automatically Locking/Unlocking Orthotic Knee Joint

    Science.gov (United States)

    Weddendorf, Bruce

    1995-01-01

    Proposed orthotic knee joint improved version of one described in "Automatically Locking/Unlocking Orthotic Knee Joint" (MFS-28633). Locks automatically upon initial application of radial force (wearer's weight) and unlocks automatically, but only when all loads (radial force and bending) relieved. Joints lock whenever wearer applies weight to knee at any joint angle between full extension and 45 degree bend. Both devices offer increased safety and convenience relative to conventional orthotic knee joints.

  14. Joint hypermobility in adults referred to rheumatology clinics.

    OpenAIRE

    Bridges, A J; Smith, E.; Reid, J.

    1992-01-01

    Joint hypermobility is a rarely recognised aetiology for focal or diffuse musculoskeletal symptoms. To assess the occurrence and importance of joint hypermobility in adult patients referred to a rheumatologist, we prospectively evaluated 130 consecutive new patients for joint hypermobility. Twenty women (15%) had joint hypermobility at three or more locations (greater than or equal to 5 points on a 9 point scale). Most patients with joint hypermobility had common musculoskeletal problems as t...

  15. The anxiety between individuals with and without joint hypermobility

    OpenAIRE

    Gulcan Gurer; Faruk Sendur; Bulent Kadri Gultekin; Mehmet Erkan Ozcan

    2010-01-01

    Background and Objectives: This study was performed to compare the anxiety disorders between individuals with and without joint hypermobility. Methods: A total of 94 Turkish volunteers, 40 subjects (38 females, 2 males) with joint hypermobility and 54 controls (47 females, 7 males) without joint hypermobility, were included in this study. We evaluated the joint hypermobility by using the Beighton scoring system in the participants and a Beighton score of at least 4 was considered as joint hyp...

  16. Characterization of adhesively bonded joints using bulk adhesive properties

    OpenAIRE

    Kon, Haruhiko

    1991-01-01

    Though using bulk adhesive properties to predict adhesively bonded joint response has yet to be proven infallible, based upon the success of previous works, this effort attempts to shed some light on the stresses present in a typical automotive bonded joint. Adhesive material properties obtained in previous works were used in a finite element analysis of a simulated automotive joint to predict the stresses in that joint. The automotive joint analyzed was a simplified repr...

  17. Handbook on dynamics of jointed structures.

    Energy Technology Data Exchange (ETDEWEB)

    Ames, Nicoli M.; Lauffer, James P.; Jew, Michael D.; Segalman, Daniel Joseph; Gregory, Danny Lynn; Starr, Michael James; Resor, Brian Ray

    2009-07-01

    The problem of understanding and modeling the complicated physics underlying the action and response of the interfaces in typical structures under dynamic loading conditions has occupied researchers for many decades. This handbook presents an integrated approach to the goal of dynamic modeling of typical jointed structures, beginning with a mathematical assessment of experimental or simulation data, development of constitutive models to account for load histories to deformation, establishment of kinematic models coupling to the continuum models, and application of finite element analysis leading to dynamic structural simulation. In addition, formulations are discussed to mitigate the very short simulation time steps that appear to be required in numerical simulation for problems such as this. This handbook satisfies the commitment to DOE that Sandia will develop the technical content and write a Joints Handbook. The content will include: (1) Methods for characterizing the nonlinear stiffness and energy dissipation for typical joints used in mechanical systems and components. (2) The methodology will include practical guidance on experiments, and reduced order models that can be used to characterize joint behavior. (3) Examples for typical bolted and screw joints will be provided.

  18. [Arthritis of the Medial Knee Joint Compartment].

    Science.gov (United States)

    Matziolis, G; Röhner, E

    2015-10-01

    23 % of all persons older than 65 years suffer from osteoarthritis of the medial compartment of the knee joint, a very common situation in orthopaedic practice 1. As a result of the demographic trend the number of patients is expected to increase in the future. Based on specific joint biomechanics and kinematics the medial knee joint compartment is more frequently affected than the lateral. Only an understanding of the functional anatomy and underlying pathology allows a critical evaluation of different available conservative and operative treatment options. This article gives an overview of diagnostic and therapeutic strategies of osteoarthritis of the medial knee joint. Frequently performed surgeries, e.g. high tibial osteotomy (HTO), unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) will be presented in a comparative manner. The actual scientific evidence will be given with the goal of an evidence based therapy that is adopted to stage and pathology of osteoarthritis of the medial compartment of the knee joint. PMID:26451864

  19. Computed Tomography of the lumbar facet joints

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Mi Ryoung; Kim, Yung Soon; Lee, Joo Hyuk; Jeon, Hae Sang; Kim, Dae Yung [Kang Nam General Hospital, Seoul (Korea, Republic of)

    1989-08-15

    The lumbar facet disease is a frequently overlooked cause of sciatic pain, but the lumbar facet joints are well-recognized source of low back pain and radiating leg pain which can be confused with sciatica due to herniated disc. We measured the angulation of the facet joints on axial spine CT films in 149 cases which contains 41 normal group and 108 abnormal group and studied the relationship between the angulation and degeneration of the facets, the asymmetry of each sided facets and facet degeneration, the asymmetry and disc protrusion, and the asymmetry and annular bulging of the disc. The results were as follows: 1. Facet angulation in abnormal group were more sagittally oriented than the normal group. 2. The angulation of right facet was more sagittally oriented than the left in L4-5 level of abnormal group. 3. Degeneration of facet joints occur asymmetrically, and the more facet joint degenerates, the more it orients sagittally, particularly in L4-5. 4. Asymmetry in facet joint degeneration and unilateral disc protrusion of L5-SI level is greater than the normal gro0008.

  20. Tribological aspects of joint intraaricular therapy.

    Science.gov (United States)

    Cherniakova, Yu M; Pinchuk, L S

    2011-01-01

    The condition of synovial joints affected by synovitis or degeneration dystrophy has been usually normalized by drugs of antibacterial, anti-inflammatory, immunomodulating and/or lubricating-protective action injected into the joint cavity. These preparations influence, but in different way, the friction in joints and wear of cartilages, even if they belong to the same pharmacological group and follow the same medication mechanism. With the development of a large group of lubricating-and-protective substitutes for the synovial fluid the tribological efficiency of injection drugs has begun to attract attention, whereas no information is available in the literature on pharmacopoeia or orthopedics about the lubricity of anti-inflammatory and antibacterial drugs commonly used as injections. The mechanisms by which structure and properties of lubricating films containing drugs undergo transformation under the influence of biological field in joints remain in fact unknown. In vitro experiments have been conducted to simulate a biofield of a joint; the lubricity of some injection drugs used in orthopedics has been evaluated. PMID:21500764

  1. Guidelines for evaluating potential joint ventures.

    Science.gov (United States)

    Himmelsbach, W A

    1987-04-01

    Holy Cross Health System (HCHS), South Bend, IN, participates in 25 joint ventures; 9 of these involve partnerships with for-profit structures and 18 relate to activities with medical staffs. To ensure that such arrangements respect the sponsoring religious institute's requirements, HCHS follows a 16-point policy to guide the development of joint ventures. The policy requires joint ventures to: Have a specific purpose relevant to community health care needs; Strive to respond to need regardless of a person's race, creed, color, or ability to pay; Include in legal documents a statement of the intent to uphold Church teachings; Base their activities on an "arm's length" relationship; Undertake reasonable efforts to establish the entity as a not-for-profit, tax-exempt corporation; Confine operations to the subsidiary's service area unless collaboration with other Catholic-sponsored organizations is involved; Include a "dispute resolution" clause in organizational documents; Establish as the partner on adequately capitalized, wholly owned not-for-profit corporation to minimize liability exposure, if the HCHS is to be a general partner in the joint venture; Retain professional consultants approved by the corporate office; Maintain reserved powers for majority-owned or majority-controlled joint ventures that are ecclesiastical entities. PMID:10301633

  2. Septic arthritis in the temporomandibular joint

    Directory of Open Access Journals (Sweden)

    Hassan Mahdi Al-Khalisy

    2015-01-01

    Full Text Available Septic arthritis of the temporomandibular joint (TMJ is a rare event that has only been reported a few dozen times worldwide. This case is remarkable for septic arthritis of the TMJ joint in an otherwise healthy male. Case Report: A 24-year-old male presented to the emergency department with periauricular swelling, erythema, fever, myalgia′s and generalized joint pain. He had previously sought medical attention and was placed on ciprofloxacin. However, he developed facial swelling and a rash and had to discontinue the antibiotic. On physical exam the patient had a large swelling and tenderness in his left periauricular area, with erythema and deviation of the right mandible which limited his ability to open the mouth. A computed tomography showed mild asymmetric soft tissue swelling in the left pharyngeal region but did not show joint effusion. Subsequent magnetic resonance imaging did show effusion of the joint space. The effusion was drained, and the synovial fluid was submitted for gram stain, culture, and sensitivity. The cultures grew menthicillin sensitive Staphyloccocus Aureus. The patient was discharged to complete a two week course of intravenous (IV Ceftriaxone and IV Vancomycin via home infusion. Conclusion: Septic Arthritis of the TMJ is a rare event with very specific clinical symptoms. Due to the low sensitivity of the computed tomography scan, magnetic resonance imaging should be considered when computed tomography scan is negative for TMJ effusion.

  3. Estimation of Joint types and Joint Limits from Motion capture data

    DEFF Research Database (Denmark)

    Engell-Nørregård, Morten Pol; Erleben, Kenny

    2009-01-01

    It is time-consuming for an animator to explicitly model joint types and joint limits of articulated figures. In this paper we describe a simple and fast approach to automated joint estimation from motion capture data of articulated figures. Our method will make the joint modeling more efficient...... and less time consuming for the animator by providing a good starting estimate that can be fine-tuned or extended by the animator if she wishes, without restricting her artistic freedom. Our method is simple, easy to implement and specific for the types of articulated figures used in interactive animation...... such as computer games. Other work for joint limit modeling consider more complex and general purpose models. However, these are not immediately suitable for inverse kinematics skeletons used in interactive applications....

  4. Thermal Protection System with Staggered Joints

    Science.gov (United States)

    Simon, Xavier D. (Inventor); Robinson, Michael J. (Inventor); Andrews, Thomas L. (Inventor)

    2014-01-01

    The thermal protection system disclosed herein is suitable for use with a spacecraft such as a reentry module or vehicle, where the spacecraft has a convex surface to be protected. An embodiment of the thermal protection system includes a plurality of heat resistant panels, each having an outer surface configured for exposure to atmosphere, an inner surface opposite the outer surface and configured for attachment to the convex surface of the spacecraft, and a joint edge defined between the outer surface and the inner surface. The joint edges of adjacent ones of the heat resistant panels are configured to mate with each other to form staggered joints that run between the peak of the convex surface and the base section of the convex surface.

  5. Internal derangement of the temporomandibular joint

    International Nuclear Information System (INIS)

    Internal Derangement is one of the most common disorders of the Temporomandibular joint. It is defined as an abnormal anatomical relationship between the discus articularis and the other structures of the temporomandibular joint. More than 2/3 of patients with clinical symptoms of the temporomandibular joint have an internal derangement. The most frequent finding in internal derangement is an anterior dislocation of the disc with reduction after mouth opening. In more severe cases a complete anterior dislocation is found without reduction of the disc. Internal derangement is a risk factor for developing osteoarthritis with remodeling of the condylus and the fossa mandibularis. The most important modalities of radiologic diagnosis are arthrography, CT and MRI. The diagnosis of craniofacial dysfunction has been improved dramatically by modern imaging techniques, which have become essential tools for primary diagnostic and evaluation after conservative or surgical therapy. MRI has become the gold standard. (orig.)

  6. Joint shape segmentation with linear programming

    KAUST Repository

    Huang, Qixing

    2011-01-01

    We present an approach to segmenting shapes in a heterogenous shape database. Our approach segments the shapes jointly, utilizing features from multiple shapes to improve the segmentation of each. The approach is entirely unsupervised and is based on an integer quadratic programming formulation of the joint segmentation problem. The program optimizes over possible segmentations of individual shapes as well as over possible correspondences between segments from multiple shapes. The integer quadratic program is solved via a linear programming relaxation, using a block coordinate descent procedure that makes the optimization feasible for large databases. We evaluate the presented approach on the Princeton segmentation benchmark and show that joint shape segmentation significantly outperforms single-shape segmentation techniques. © 2011 ACM.

  7. Approach to Joint Pain in Children.

    Science.gov (United States)

    Balan, Suma

    2016-02-01

    It is not uncommon in pediatric clinical practice to encounter children with musculoskeletal symptoms. A number of disparate conditions can present with joint complaints in children. In this article, the author describes the clinical approach to a child presenting with joint complaints. A detailed clinical history, including the family history, along with a complete physical examination can provide vital clues to the underlying condition in most cases. A structured screening examination of the musculoskeletal system that has been recently developed (i.e., pGALS) is also discussed. It is also pointed out that the pattern of joint involvement gives us one of the most important clues to the etiology of arthritis. The pediatrician has to be aware of the conditions that can have arthritis as one of the manifestations so as to investigate and treat the child accordingly. PMID:26747081

  8. Computational Poromechanics of Human Knee Joint

    International Nuclear Information System (INIS)

    Extensive computer modeling has been performed in the recent decade to investigate the mechanical response of the healthy and repaired knee joints. Articular cartilages and menisci have been commonly modeled as single-phase elastic materials in the previous 3D simulations. A comprehensive study considering the interplay of the collagen fibers and fluid pressurization in the tissues in situ remains challenging. We have developed a 3D model of the human knee accounting for the mechanical function of collagen fibers and fluid flow in the cartilages and menisci. An anatomically accurate structure of the human knee was used for this purpose including bones, articular cartilages, menisci and ligaments. The fluid pressurization in the femoral cartilage and menisci under combined creep loading was investigated. Numerical results showed that fluid flow and pressure in the tissues played an important role in the mechanical response of the knee joint. The load transfer in the joint was clearly seen when the fluid pressure was considered.

  9. Computational Poromechanics of Human Knee Joint

    Science.gov (United States)

    Kazemi, Mojtaba; Li, LePing

    2012-02-01

    Extensive computer modeling has been performed in the recent decade to investigate the mechanical response of the healthy and repaired knee joints. Articular cartilages and menisci have been commonly modeled as single-phase elastic materials in the previous 3D simulations. A comprehensive study considering the interplay of the collagen fibers and fluid pressurization in the tissues in situ remains challenging. We have developed a 3D model of the human knee accounting for the mechanical function of collagen fibers and fluid flow in the cartilages and menisci. An anatomically accurate structure of the human knee was used for this purpose including bones, articular cartilages, menisci and ligaments. The fluid pressurization in the femoral cartilage and menisci under combined creep loading was investigated. Numerical results showed that fluid flow and pressure in the tissues played an important role in the mechanical response of the knee joint. The load transfer in the joint was clearly seen when the fluid pressure was considered.

  10. Experimental evaluation for joint estimation approach

    International Nuclear Information System (INIS)

    Single Photon Emission Computed Tomography (SPECT) provides a potential to perform in vivo quantification of the radioactivity and dose distributions in the process of evaluating radiopharmaceuticals. The inherent modest resolution in SPECT impedes the potential of accurate quantification. Previously, we investigated a joint estimation approach for combining SPECT functional information with high resolution, structurally correlated MRI anatomical information to improve the accuracy of SPECT quantification, and the computer simulation results showed that this approach can exploit MRI region information that matches the SPECT functional information and to reduce artifacts caused by mismatched MRI anatomical information. In this paper, we further describe the experimental evaluation of the joint estimation approach using actual SPECT and MRI imaging with an animal-sized phantom. We will describe practical details in applying the joint estimation approach and present the experimental evaluation results of quantitative analysis

  11. Joint disease in children of Asiatic origin

    International Nuclear Information System (INIS)

    Joint disorders in Asian children are varied due to the diversity of the Asian population and show some ethnic trends. The ethnic diversity, socio-economic and geographic factors in Asia have limited the availability of data from some of the ethnic groups, many of whom live in remote and relatively underdeveloped areas, are not subjected to epidemiological surveillance and have little awareness of these diseases and their consequences. Geographic and socio-economic factors also play a significant role in some of the joint diseases peculiar to Asian children. In general, the current available data suggests that there are no large differences in the epidemiology and clinical features between the Western and Asian children. This article reviews the available literature on joint diseases in Asian children

  12. MR tomography of the elbow joint

    International Nuclear Information System (INIS)

    MR examinations of the elbow joint of three healthy subjects and a comparison with corresponding sections of anatomical preparations show that MR tomography enables not only an excellent differentiation of muscles, tendons and of the articular capsule, but will also visualise vessels and nerve tracts. MR tomography proved superior to the conventional methods in demonstration of separate fragments and inflammatory changes in the bone on examining 11 pathological elbow joints: congenital malformation, osteochondritis dissecans, ostitis, ulnar and radial nerve lesions, completely healed radius fracture and epicondylitis of the radial and ulnar humerus. Epicondylitis could not be demonstrated by MR. Magnetic resonance tomography seems to be the only method that enables direct visualisation of the nerve paths at the elbow joint. (orig.)

  13. MR tomography of the elbow joint

    Energy Technology Data Exchange (ETDEWEB)

    Zwaan, M.; Rinast, E.; Weiss, H.D.; Pressler, M.; Vogel, H.

    1989-03-01

    MR examinations of the elbow joint of three healthy subjects and a comparison with corresponding sections of anatomical preparations show that MR tomography enables not only an excellent differentiation of muscles, tendons and of the articular capsule, but will also visualise vessels and nerve tracts. MR tomography proved superior to the conventional methods in demonstration of separate fragments and inflammatory changes in the bone on examining 11 pathological elbow joints: congenital malformation, osteochondritis dissecans, ostitis, ulnar and radial nerve lesions, completely healed radius fracture and epicondylitis of the radial and ulnar humerus. Epicondylitis could not be demonstrated by MR. Magnetic resonance tomography seems to be the only method that enables direct visualisation of the nerve paths at the elbow joint.

  14. Branch management into micropipeline joint dot

    Directory of Open Access Journals (Sweden)

    Dimitar Tyanev

    2011-11-01

    Full Text Available This paper considers problems related to hardware implementation of computational process with conditional jumps. Hardware refers to asynchronous pipeline organization at microoperational level. Exploration is dedicated to one of the tasks presented in (Tyanev, D., 2009 concerning to micropipeline controller design to control micropipeline stage into joint dot of branch algorithm. Joint dot is the point at which few preceding branches are combined. It appears inevitably into conditional jump structures and this is the reason for the actuality of its problem. Analysis of this new task is presented and request arbitration functioning principles are formulated for the incoming to joint dot requests. The arbiter is responsible for the fair choice on which depends steady peformance of separate pipeline brances. Paper also describes pipeline controller synthesis and analysis of its operation in two variants: about 2-phase and 4-phase data transfer protocol. The synthesized asynchronous arbiter scheme is invariant to the type of pipeline protocol.

  15. Joint involvement in patients affected by systemic lupus erythematosus: application of the swollen to tender joint count ratio

    OpenAIRE

    E. Cipriano; F. Ceccarelli; L. Massaro; F. R. Spinelli; C. Alessandri; C. Perricone; G. Valesini; Conti, F.

    2015-01-01

    Joint involvement is a common manifestation in systemic lupus erythematosus (SLE). According to the SLE disease activity index 2000 (SLEDAI-2K), joint involvement is present in case of ≥2 joints with pain and signs of inflammation. However this definition could fail to catch all the various features of joint involvement. Alternatively the Swollen to Tender joint Ratio (STR) could be used. This new index, which was originally proposed for rheumatoid arthritis (RA) patients, is based on the cou...

  16. Distributed-Computer System Optimizes SRB Joints

    Science.gov (United States)

    Rogers, James L., Jr.; Young, Katherine C.; Barthelemy, Jean-Francois M.

    1991-01-01

    Initial calculations of redesign of joint on solid rocket booster (SRB) that failed during Space Shuttle tragedy showed redesign increased weight. Optimization techniques applied to determine whether weight could be reduced while keeping joint closed and limiting stresses. Analysis system developed by use of existing software coupling structural analysis with optimization computations. Software designed executable on network of computer workstations. Took advantage of parallelism offered by finite-difference technique of computing gradients to enable several workstations to contribute simultaneously to solution of problem. Key features, effective use of redundancies in hardware and flexible software, enabling optimization to proceed with minimal delay and decreased overall time to completion.

  17. Radiodiagnosis of occlusal temporomandibular joint dysfunctions

    International Nuclear Information System (INIS)

    The diagnostic value of conventional oblique-lateral transcranial standard projections for radiography of the temporomandibular joints is limited by various anatomical factors and the projection geometry. Improved results are obtained by individualization of the projection. The author describes a method for determining the individually optimum oblique-lateral projection, a method which is based on pre-exposure fluoroscopy of the temporomandibular joint with an electronic image intensifier system incorporating a television chain. The method has been employed as routine practice for 15 years; it has been modified several times and enables documentation studies to be made with an unusually high degree of reproducibility with respect to beam projection. (Auth.)

  18. Multidetector Computed Tomography in Acute Joint Fractures

    Energy Technology Data Exchange (ETDEWEB)

    Haapamaeki, V.V.; Kiuru, M.J.; Mustonen, A.O.; Koskinen, S.K. [Helsinki Univ. Central Hospital (Finland). Helsinki Medical Imaging Center

    2005-10-01

    Conventional radiography plays an essential diagnostic role in the primary evaluation of acute joint trauma. In complex fractures, however, computed tomography (CT) is an imaging modality often used second to radiography. As a result of technical breakthroughs in the field, multidetector CT (MDCT) allows faster imaging and better temporal, spatial, and contrast resolution compared with conventional single-slice spiral CT. MDCT with multiplanar reformation is helpful in disclosing fracture patterns, particularly in complex joint fractures, where they reveal occult fractures and show the exact number of fracture components and their degree of displacement.

  19. Jointed assembly actuated by fluid pressure

    Science.gov (United States)

    Monroe, John W.

    1992-08-01

    The invention is an assembly of a plurality of relatively movable jointed members such as robotic arm segments and a mechanical muscle connected between two of the segments. The muscle has a longitudinally inflexible, radially expandable sleeve containing a pressurizable bladder of elastic material. The bladder enlarges diametrically when pressurized and bulges the wall of the sleeve outward. The sleeve thereupon contracts axially to compensate for length taken up by the sleeve's outward bulge. Terminus at either end of the sleeve connects the sleeve to different segments of a jointed arm, that the sleeve's axial contraction effects movement of one segment relative to the other.

  20. Recurrent Dislocation of the Shoulder Joint

    OpenAIRE

    Brand, Richard A.

    2008-01-01

    Dr. Anthony F. DePalma is shown. Photograph provided with kind permission of the Art Committee of Thomas Jefferson University, Philadelphia, PA. Dr. DePalma was the first editor of Clinical Orthopaedics and Related Research, established by the recently formed Association of Bone and Joint Surgeons. The idea of forming the Association of Bone and Joint surgeons had been conceived by Dr. Earl McBride of Oklahoma City in 1947, and organized by a group of twelve individuals (Drs. Earl McBride, Ga...

  1. Managing inventory costs through joint procurement programs

    International Nuclear Information System (INIS)

    Given current economic and regulatory challenges, utilities are facing the need to manage inventories more efficiently, lower spare parts costs, and reduce the downtime associated with equipment failure. Two programs helping utilities achieve these goals are the Joint Procurement Corporation (JPC) for multicompany purchase of common equipment and services and the pooled inventory management (PIM) program for joint purchase and storage of nuclear generating unit spare parts. Both of these are cooperative programs that decrease the probability of extended plant outages and reduce duplication of effort and/or inventory among participating utilities

  2. Multidetector Computed Tomography in Acute Joint Fractures

    International Nuclear Information System (INIS)

    Conventional radiography plays an essential diagnostic role in the primary evaluation of acute joint trauma. In complex fractures, however, computed tomography (CT) is an imaging modality often used second to radiography. As a result of technical breakthroughs in the field, multidetector CT (MDCT) allows faster imaging and better temporal, spatial, and contrast resolution compared with conventional single-slice spiral CT. MDCT with multiplanar reformation is helpful in disclosing fracture patterns, particularly in complex joint fractures, where they reveal occult fractures and show the exact number of fracture components and their degree of displacement

  3. Ganglions of the proximal interphalangeal joint.

    Science.gov (United States)

    Cheng, C A; Rockwell, W B

    1999-08-01

    Ganglion cysts-the most common hand tumors-usually affect women in their twenties and thirties. The cause of these cysts is unknown, although trauma has been postulated as an inciting factor. Ganglions occur most commonly at the dorsal and palmar wrist. However, ganglions of the proximal interphalangeal (PIP) joint are rare. Four patients with PIP joint ganglions were recently treated at our institution. Three received aspiration and one received operative therapy, all with good results. All four patients were older than 65 years. PMID:10470671

  4. Joint source-channel video transmission

    CERN Document Server

    Zhai, Fan

    2007-01-01

    This book deals with the problem of joint source-channel video transmission, i.e., the joint optimal allocation of resources at the application layer and the other network layers, such as data rate adaptation, channel coding, power adaptation in wireless networks, quality of service (QoS) support from the network, and packet scheduling, for efficient video transmission. Real-time video communication applications, such as videoconferencing, video telephony, and on-demand video streaming, have gained increased popularity. However, a key problem in video transmission over the existing Internet an

  5. Dislocation of the proximal tibiofibular joint

    Directory of Open Access Journals (Sweden)

    Milankov Miroslav

    2013-01-01

    Full Text Available Introduction. Dislocation of the proximal tibiofibular joint is a rare injury. It occurs during a sports activity that includes rough twisting movements of the bent knee. The role of the proximal tibiofibular joint is to reduce torsional loads to the ankle, to distribute the bending moment of the outer side of tibia, and transfer the vertical load while standing. In the literature there is no larger series; only several cases of the proximal tibiofibular joint dislocation treated by different methods have been published so far. Case Report. A 23-year-old male soccer player sustained an injury after he had joined the game without previous warming-up. He fell on his right side because of a sudden change of direction while his foot was fixed to the base. He felt a severe pain and had a sensation as if something had snapped in his right knee. Pain and swelling at the head of fibula were found by physical examination, which, however, did not reveal any pain, swelling and instability of the ankle or peroneal nerve palsy. The x-ray showed anterolateral dislocation of the proximal tibiofibular joint, Ogden type II. Since manual reposition in general anesthesia failed, open reduction internal fixation was performed and proximal tibiofibular joint was transfixed with a screw. After the wound closure, the above-the-knee plaster cast was applied. The screw was extracted six weeks later, full weight bearing was allowed and he started with physical therapy. Four months after the injury he returned to sports activities. On the follow- up one year after the injury he had the full range of motion of the knee, no complains, and continued with active soccer playing. X-ray showed no signs of arthrosis of the proximal tibiofibular joint. Conclusion. The proximal tibiofibular joint dislocation may be the cause of the chronic pain of the knee so it has to be taken into account when making differential diagnosis in case of the pain at the lateral side of the knee. The

  6. Ka-band waveguide rotary joint

    KAUST Repository

    Yevdokymov, Anatoliy

    2013-04-11

    The authors present a design of a waveguide rotary joint operating in Ka-band with central frequency of 33 GHz, which also acts as an antenna mount. The main unit consists of two flanges with a clearance between them; one of the flanges has three circular choke grooves. Utilisation of three choke grooves allows larger operating clearance. Two prototypes of the rotary joint have been manufactured and experimentally studied. The observed loss is from 0.4 to 0.8 dB in 1.5 GHz band.

  7. TEMPOROMANDIBULAR JOINT ANKYLOSIS: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Ankita

    2014-04-01

    Full Text Available Ankylosis is a Greek terminology meaning "stiff joint." It can be defined as "inability to open mouth due to either a fibrous or bony union between the head of the condyle and glenoid fossa."1 Temporomandibular joint (TMJ ankylosis is a disorder that leads to a restriction of the mouth opening from partial reduction to complete immobility of the jaw. It is most commonly associated with trauma (13-100%, local or systemic infection (0-53%, or systemic disease, such as ankylosing spondylitis, rheumatoid arthritis, or psoriasis.2, 3

  8. Modeling Progressive Failure of Bonded Joints Using a Single Joint Finite Element

    Science.gov (United States)

    Stapleton, Scott E.; Waas, Anthony M.; Bednarcyk, Brett A.

    2010-01-01

    Enhanced finite elements are elements with an embedded analytical solution which can capture detailed local fields, enabling more efficient, mesh-independent finite element analysis. In the present study, an enhanced finite element is applied to generate a general framework capable of modeling an array of joint types. The joint field equations are derived using the principle of minimum potential energy, and the resulting solutions for the displacement fields are used to generate shape functions and a stiffness matrix for a single joint finite element. This single finite element thus captures the detailed stress and strain fields within the bonded joint, but it can function within a broader structural finite element model. The costs associated with a fine mesh of the joint can thus be avoided while still obtaining a detailed solution for the joint. Additionally, the capability to model non-linear adhesive constitutive behavior has been included within the method, and progressive failure of the adhesive can be modeled by using a strain-based failure criteria and re-sizing the joint as the adhesive fails. Results of the model compare favorably with experimental and finite element results.

  9. Reliability of agriculture universal joint shafts based on temperature measuring in universal joint bearing assemblies

    Directory of Open Access Journals (Sweden)

    Аleksandar Asonja

    2015-03-01

    Full Text Available This paper presents a research into reliability calculations of agriculture double universal joint shafts based on temperature measuring in cardan-type universal joint bearing assemblies. Special laboratory equipment was developed for this research which is presented in the paper. The objective of this research was to test the real life span of universal joint shafts in the laboratory and in field, to obtain the results which can be used to improve the reliability of universal joint shafts. If the presented research were used along with maintenance measures recommended in the paper and with proper use, the level of reliability of the shafts would be 2.1 times higher. The presented results of the research showed that needle bearings, i.e. bearing assemblies of the joints, are the most critical elements on universal joint shafts and are possible causes of their lower reliability. The second universal joint is the part with the lowest reliability in the observed technical system.

  10. Norsk-russiske joint ventures : hvorfor lykkes enkelte norsk-russiske joint ventures, mens andre mislykkes?

    OpenAIRE

    Berge, Odd Magne; Kjelling, Peter

    2009-01-01

    Denne oppgaven omhandler joint ventures mellom norske og russiske bedrifter. Vi har jobbet ut fra problemstillingen ”Hvorfor lykkes enkelte norsk-russiske joint ventures, mens andre mislykkes?” Dette er et interessant tema fordi Russland er- og har lenge vært en viktig handelspartner for Norge. I tillegg har det ikke vært gjort mye forskning på fenomenet norsk-russiske joint ventures tidligere. Russland er et stort og mektig land, rikt på ressurser og med en økonomi som stad...

  11. Complications Related to Metal-on-Metal Articulation in Trapeziometacarpal Joint Total Joint Arthroplasty

    OpenAIRE

    Christina Frølich; Torben Bæk Hansen

    2015-01-01

    Adverse reactions to metal-on-metal (MoM) prostheses are well known from total hip joint resurfacing arthroplasty with elevated serum chrome or cobalt, pain and pseudo tumor formation. It may, however, also be seen after total joint replacement of the trapeziometacarpal joint using MoM articulation, and we present two cases of failure of MoM prostheses due to elevated metal-serum levels in one case and pseudo tumor formation in another case. Furthermore, we suggest a diagnostic algorithm for ...

  12. Effect of chord can length on strength of T joints

    Energy Technology Data Exchange (ETDEWEB)

    Madros, M.S.Z.; Zettlemoyer, N.; Healy, B.E.

    1995-12-01

    A study has been conducted to examine the influence of can length on the static strength of compression loaded T-joints. Finite Element models of the T-joints are developed and analyzed using the SESAM/Pretube, PATRAN{reg_sign}, and ABAQUS{trademark} computer programs. The ultimate loads from the analyses are compared with recommended values in API (1993) and other codes. In general, it appears that the API recommended ultimate strength values for T joints with low {beta} should be modified. Also, the API derating equation for X joints with short cans is conservative for T joints. However, a derating equation is required for T joints.

  13. Decision Fusion System for Bolted Joint Monitoring

    Directory of Open Access Journals (Sweden)

    Dong Liang

    2015-01-01

    Full Text Available Bolted joint is widely used in mechanical and architectural structures, such as machine tools, industrial robots, transport machines, power plants, aviation stiffened plate, bridges, and steel towers. The bolt loosening induced by flight load and environment factor can cause joint failure leading to a disastrous accident. Hence, structural health monitoring is critical for the bolted joint detection. In order to realize a real-time and convenient monitoring and satisfy the requirement of advanced maintenance of the structure, this paper proposes an intelligent bolted joint failure monitoring approach using a developed decision fusion system integrated with Lamb wave propagation based actuator-sensor monitoring method. Firstly, the basic knowledge of decision fusion and classifier selection techniques is briefly introduced. Then, a developed decision fusion system is presented. Finally, three fusion algorithms, which consist of majority voting, Bayesian belief, and multiagent method, are adopted for comparison in a real-world monitoring experiment for the large aviation aluminum plate. Based on the results shown in the experiment, a big potential in real-time application is presented that the method can accurately and rapidly identify the bolt loosening by analyzing the acquired strain signal using proposed decision fusion system.

  14. Arthroscopic management of painful first metatarsophalangeal joint

    Directory of Open Access Journals (Sweden)

    Debnath U

    2005-01-01

    Full Text Available Background: Arthroscopy of the great toe MTP joint has been practiced with favourable outcomes. A range of indications have been described ranging from synovitis to osteochondral defects. The purpose of the present study was to describe our technique and to assess the functional outcome following arthroscopic management of Hallux MTP disorders using AOFAS scoring system. Methods: We describe the technique of Hallux MTP joint arthroscopy in twenty patients. Indications included hallux rigidus with osteophytes, chondromalacia, OCDs, loose bodies, arthrofibrosis, synovitis, tophaceous gout arthritis and intra-articular fractures of MTP joint. All patients had been evaluated clinically and radiologically with record of their AOFAS scores pre-operatively. At a minimum follow-up of two years the clinical assessment was carried out with AOFAS scores. Results: The mean pre-operative and post-operative AOFAS score were 47 (range 10-78 and 97 (87 -100 respectively. The patient with intra-articular fracture had an excellent outcome following arthroscopic reduction of the fracture. Conclusion: Arthroscopic management of painful hallucial MTP joint is a specialized technique, which if performed for the right indications, gives a favourable outcome with minimal complications.

  15. Interactive segmentation of Hip Joint Cartilage

    Czech Academy of Sciences Publication Activity Database

    Dvořák, Pavel; Juráš, V.; Vogl, W.; Chytil, J.

    Cambridge: The Electromagnetics Academy, 2014, s. 2369-2372. ISBN 978-1-934142-28-8. [PIERS 2014. Progress In Electromagnetics Research Symposium /35./. Guangzhou (CN), 25.08.2014-28.08.2014] R&D Projects: GA ČR GAP102/12/1104 Institutional support: RVO:68081731 Keywords : hip joint * MRI * segmentation of cartilage Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

  16. 2016 Joint Universities Accelerator School (JUAS) - Registrations

    CERN Multimedia

    2015-01-01

    The registrations for the 2016 session of the Joint Universities Accelerator School (JUAS) are now open.   Applications are welcome from second-year Master and PhD and for physicists wishing to further their knowledge in this particular field. The deadline for submission of the full application form is 30 October 2015.

  17. Joint ventures and concentrations in oil market

    International Nuclear Information System (INIS)

    Many are the joint ventures taken during last year by the oil companies as a move towards the ever existing rules of the oil market: integration, economies of scale and reduction of competitive market uncertainty. This article discusses some of the most interesting points of the recent events and the initiatives in the Italian market

  18. Biochemical Markers of Joint Tissue Turnover

    DEFF Research Database (Denmark)

    Bay-Jensen, Anne-Christine; Sondergaard, Bodil Cecilie; Christiansen, Claus;

    2009-01-01

    available for the study of tissue turnover in each of the three compartments of the articular joint, that is the bone, the cartilage, and the synovium. Finally, we provide some perspective to future developments in biomarker discovery and discuss the potential impact such technologies could have on the drug...

  19. Automatically Locking/Unlocking Orthotic Knee Joint

    Science.gov (United States)

    Weddendorf, Bruce

    1994-01-01

    Proposed orthotic knee joint locks and unlocks automatically, at any position within range of bend angles, without manual intervention by wearer. Includes tang and clevis, locks whenever wearer transfers weight to knee and unlocks when weight removed. Locking occurs at any angle between 45 degrees knee bend and full extension.

  20. Ultrasound findings of the locked metacarpophalangeal joint

    Energy Technology Data Exchange (ETDEWEB)

    Wessely, Kathryn; Healy, Jeremiah; Lee, Justin [Chelsea and Westminster Hospital, Department of Radiology, London (United Kingdom); Owers, Kate [Chelsea and Westminster Hospital, Department of Trauma and Orthopaedics Hand Unit, London (United Kingdom)

    2009-01-15

    The radiographs and sonographic findings of two cases of locked metacarpophalangeal joint secondary to tethering of the volar plate are described. The presence of osteophytes and the dynamic ultrasound assessment of the volar plate have provided confirmation of the clinical diagnosis prior to surgery. (orig.)

  1. Finger-jointed beams in bending

    DEFF Research Database (Denmark)

    Andreasen, Lotte; Hoffmeyer, Preben

    1997-01-01

    An investigation of the dynamic and static fatique of finger-jointed beams in bending was carried out. Results were obtained for five different frequencies from static loading to a load cycle period of two minutes. A total of seven series were long-term tested and five series were short-term tested...

  2. Joint Individual-Group Modeling for Tracking.

    Science.gov (United States)

    Bazzani, Loris; Zanotto, Matteo; Cristani, Marco; Murino, Vittorio

    2015-04-01

    We present a novel probabilistic framework that jointly models individuals and groups for tracking. Managing groups is challenging, primarily because of their nonlinear dynamics and complex layout which lead to repeated splitting and merging events. The proposed approach assumes a tight relation of mutual support between the modeling of individuals and groups, promoting the idea that groups are better modeled if individuals are considered and vice versa. This concept is translated in a mathematical model using a decentralized particle filtering framework which deals with a joint individual-group state space. The model factorizes the joint space into two dependent subspaces, where individuals and groups share the knowledge of the joint individual-group distribution. The assignment of people to the different groups (and thus group initialization, split and merge) is implemented by two alternative strategies: using classifiers trained beforehand on statistics of group configurations, and through online learning of a Dirichlet process mixture model, assuming that no training data is available before tracking. These strategies lead to two different methods that can be used on top of any person detector (simulated using the ground truth in our experiments). We provide convincing results on two recent challenging tracking benchmarks. PMID:26353291

  3. Sacroiliac Joint Pain and Its Treatment.

    Science.gov (United States)

    Rashbaum, Ralph F; Ohnmeiss, Donna D; Lindley, Emily M; Kitchel, Scott H; Patel, Vikas V

    2016-03-01

    The sacroiliac joint (SIJ) as a source of symptoms has been controversial; however, as knowledge about the joint increased, its role as a pain generator in patients complaining of symptoms that are often attributed to spinal pathology has become better appreciated. The literature reports that the SIJ is the pain origin in as many as 30% of patients presenting with low back pain. Clinically, the SIJ can be challenging to evaluate; however, assessing pain location, patient posture/movement, and provocative manual testing are useful in making the presumptive diagnosis of SIJ disruption. The most definitive evaluation is image-guided injection of anesthetic solutions into the joint which is diagnostic if there is at least 75% symptom relief acutely. Treatment begins with nonoperative intervention including physical therapy and/or chiropractic care. If these fail, the next option is generally radiofrequency denervation (rhizotomy) of the joint. If this does not provide adequate relief, surgical intervention, in the form of minimally invasive SIJ fusion may be considered. The literature increasingly supports favorable results of SIJ fusion in appropriately selected patients. The purpose of this review is to provide an overview of the current literature on the SIJ, with focus on its surgical treatment. PMID:26889985

  4. Wave Propagation in Jointed Geologic Media

    Energy Technology Data Exchange (ETDEWEB)

    Antoun, T

    2009-12-17

    Predictive modeling capabilities for wave propagation in a jointed geologic media remain a modern day scientific frontier. In part this is due to a lack of comprehensive understanding of the complex physical processes associated with the transient response of geologic material, and in part it is due to numerical challenges that prohibit accurate representation of the heterogeneities that influence the material response. Constitutive models whose properties are determined from laboratory experiments on intact samples have been shown to over-predict the free field environment in large scale field experiments. Current methodologies for deriving in situ properties from laboratory measured properties are based on empirical equations derived for static geomechanical applications involving loads of lower intensity and much longer durations than those encountered in applications of interest involving wave propagation. These methodologies are not validated for dynamic applications, and they do not account for anisotropic behavior stemming from direcitonal effects associated with the orientation of joint sets in realistic geologies. Recent advances in modeling capabilities coupled with modern high performance computing platforms enable physics-based simulations of jointed geologic media with unprecedented details, offering a prospect for significant advances in the state of the art. This report provides a brief overview of these modern computational approaches, discusses their advantages and limitations, and attempts to formulate an integrated framework leading to the development of predictive modeling capabilities for wave propagation in jointed and fractured geologic materials.

  5. Synovial osteochondromatosis of the temporomandibular joint

    International Nuclear Information System (INIS)

    Synovial osteochondromatosis (SO) is a meta plastic process by which synovial mesenchymal cells transform into chondroblasts and chondrocytes. This disease affects most frequently the knee, the hip, the elbow, and uncommonly the temporomandibular joint (TMJ). The authors present 2 cases of synovial osteochondromatosis of the TMJ. (author)

  6. Designing an International Joint Venture Negotiation Game.

    Science.gov (United States)

    Kenkel, Phil; And Others

    1996-01-01

    Evaluates a simulation game that models management problems encountered in negotiating and managing international joint ventures. Designed to instruct executives of state-owned agribusinesses in Indonesia in abstract concepts such as partner rapport, transfer price conflicts, and marketing disagreements, its success suggests that simulation games…

  7. Surgical management of temporomandibular joint ankylosis.

    Science.gov (United States)

    Maki, Mohammed Hashim; Al-Assaf, Dhuha A

    2008-11-01

    Ankylosis of the temporomandibular joint (TMJ) is one of the causes of persistent and progressive limitation of mouth opening. It usually requires to be corrected surgically; an intervention not without complications. This study was conducted in a central surgical hospital in Iraq (Baghdad) in the era hallmarked by shortage of nearly all facilities needed to accomplish solutions for a surgical task. The surgical procedure is displayed along with modifications, complications, and follow-up protocol. Fifteen patients (21 joints) have been treated surgically for TMJ ankylosis of different severities. All patients were treated at the Department of Oral and Maxillofacial Surgery, Specialized Surgical Hospital-Baghdad Medical City, Iraq. The study was carried out in the period between 1998 and 2002 (inclusive). Patients' ages ranged between 4 and 52 years. In addition to the clinical diagnoses, further evaluation of the ankylosis area was assisted by the use of orthopantomography and spiral computerized scanning (axial, coronal sections, and three-dimensional views). Maximal incisal opening was registered before and after surgery for further follow-up evaluation. Al-Kayat and Bramely approach is advocated to expose the joint area. All 21 joints were operated through blind nasoendotracheal intubation general anesthesia. Computed tomography scans, wide exposures, aggressive resections, proper interposition materials, strict postoperative physiotherapy, and good family and patient compliance all may decrease the possibility of relapse and offer better results. Early management of TMJ ankylosis is important if more damage in orofacial structures and consolidation of bony union are to be avoided. PMID:19098556

  8. Joint production and price uncertainty: hypothesis tests

    OpenAIRE

    Alghalith, Moawia

    2006-01-01

    This paper extends the existing estimation methods to allow empirical estimation and hypothesis testing under joint production and price uncertainty. Our approach modifies and expands the use of duality theory. Furthermore, our approach does not require the specification or estimation of the production/cost function. We apply the methodology to the U.S. manufacturing sector.

  9. The neuromuscular differential diagnosis of joint hypermobility

    NARCIS (Netherlands)

    Donkervoort, S.; Bonnemann, C.G.; Loeys, B.L.; Jungbluth, H.; Voermans, N.C.

    2015-01-01

    Joint hypermobility is the defining feature of various inherited connective tissue disorders such as Marfan syndrome and various types of Ehlers-Danlos syndrome and these will generally be the first conditions to be considered by geneticists and pediatricians in the differential diagnosis of a patie

  10. The functional consequences of Generalized Joint Hypermobility

    DEFF Research Database (Denmark)

    Scheper, Mark C; de Vries, Janneke E; Juul-Kristensen, Birgit;

    2014-01-01

    BACKGROUND: Generalized Joint Hypermobility (GJH) has been found to be associated with musculoskeletal complaints and disability. For others GJH is seen as a prerequisite in order to excel in certain sports like dance. However, it remains unclear what the role is of GJH in human performance...

  11. Space Suit Joint Torque Measurement Method Validation

    Science.gov (United States)

    Valish, Dana; Eversley, Karina

    2012-01-01

    In 2009 and early 2010, a test method was developed and performed to quantify the torque required to manipulate joints in several existing operational and prototype space suits. This was done in an effort to develop joint torque requirements appropriate for a new Constellation Program space suit system. The same test method was levied on the Constellation space suit contractors to verify that their suit design met the requirements. However, because the original test was set up and conducted by a single test operator there was some question as to whether this method was repeatable enough to be considered a standard verification method for Constellation or other future development programs. In order to validate the method itself, a representative subset of the previous test was repeated, using the same information that would be available to space suit contractors, but set up and conducted by someone not familiar with the previous test. The resultant data was compared using graphical and statistical analysis; the results indicated a significant variance in values reported for a subset of the re-tested joints. Potential variables that could have affected the data were identified and a third round of testing was conducted in an attempt to eliminate and/or quantify the effects of these variables. The results of the third test effort will be used to determine whether or not the proposed joint torque methodology can be applied to future space suit development contracts.

  12. The Joint Physics Analysis Center Website

    CERN Document Server

    Mathieu, Vincent

    2016-01-01

    The Joint Physics Analysis Center is a collaboration between theorists and experimentalists working in hadronic physics. In order to facilitate the exchange of information between the different actors in hadron spectroscopy, we created an interactive website. In this note, I summarize the first projects available on the website.

  13. Transducer Joint for Kidney-Stone Ultrasonics

    Science.gov (United States)

    Angulo, E. D.

    1983-01-01

    Ultrasonic therapy for kidney stones improved by new way of connecting wire-probe ultrasonic waveguide to transducer. Improved mounting allows joint to last long enough for effective treatment. Sheath and rubber dampers constrain lateral vibration of wire waveguide. Combination of V-shaped mounting groove, sheath, and rubber dampers increases life expectancy of wire 15 times or more.

  14. 29 CFR 570.115 - Joint applicability.

    Science.gov (United States)

    2010-07-01

    ... Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS CHILD LABOR REGULATIONS, ORDERS AND STATEMENTS OF INTERPRETATION General Statements of Interpretation of the Child Labor... 12(a) and 12(c) § 570.115 Joint applicability. The child labor coverage provisions contained...

  15. Failure of dissimilar material bonded joints

    Science.gov (United States)

    Konstantakopoulou, M.; Deligianni, A.; Kotsikos, G.

    2016-03-01

    Joining of materials in structural design has always been a challenge for engineers. Bolting and riveting has been used for many years, until the emergence of fusion welding which revolutionised construction in areas such as shipbuilding, automotive, infrastructure and consumer goods. Extensive research in the past 50 years has resulted in better understanding of the process and minimised the occurrence of failures associated with fusion welding such as, residual stress cracking, stress corrosion and corrosion fatigue cracking, localised reduction in mechanical properties due to microstructural changes (heat affected zone) etc. Bonding has been a technique that has been proposed as an alternative because it eliminates several of the problems associated with fusion welding. But, despite some applications it has not seen wide use. There is however a renewed interest in adhesively bonded joints, as designers look for ever more efficient structures which inevitably leads to the use and consequently joining of combinations of lightweight materials, often with fundamentally different mechanical and physical properties. This chapter provides a review of adhesively bonded joints and reports on improvements to bonded joint strength through the introduction of carbon nanotubes at the bond interface. Results from various workers in the field are reported as well as the findings of the authors in this area of research. It is obvious that there are several challenges that need to be addressed to further enhance the strength of bonded joints and worldwide research is currently underway to address those shortcomings and build confidence in the implementation of these new techniques.

  16. Joint Local Quasinilpotence and Common Invariant Subspaces

    Indian Academy of Sciences (India)

    A Fernández Valles

    2006-08-01

    In this article we obtain some positive results about the existence of a common nontrivial invariant subspace for -tuples of not necessarily commuting operators on Banach spaces with a Schauder basis. The concept of joint quasinilpotence plays a basic role. Our results complement recent work by Kosiek [6] and Ptak [8].

  17. CHINA-MALAYSIA JOINT SEMINAR ON SPACE

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    In conjunction with the 30th anniversary of diplomatic relationship between China and Malaysia, a seminar on Space for Sustainable Development was jointly held by China National Space Administration (CNSA) and National Space Agency of Malaysia on 2-4 September, 2004 in Kuala Lumpur, Malaysia.

  18. The Joint Dynamics of Equity Market Factors

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Langlois, Hugues

    2013-01-01

    The 4 equity market factors from Fama and French (1993) and Carhart (1997) are pervasive in academia and practice. However, not much is known about their joint distribution and dynamics. We find striking evidence of asymmetric tail dependence across the factors. While the linear factor correlations...

  19. Computational Biomechanics of the Wrist Joint

    CERN Document Server

    Nazri Bajuri, Mohd

    2013-01-01

    This book presents an analysis of the stress distribution and contact stresses in severe rheumatoid wrist after total wrist arthroplasty. It assesses and compares the load transfer throughout the joint and contact pressure at the articulations. The data obtained from this study is of importance as this provide greater evidence to the benefits of total wrist arthroplasty in rheumatoid arthritis patients.

  20. Report of the Joint Accounting Group.

    Science.gov (United States)

    Western Interstate Commission for Higher Education, Boulder, CO. National Center for Higher Education Management Systems.

    The Joint Accounting Group (JAG) has as its primary goal to develop a capability to provide uniform transactional finance data at the institutional level. Such data should effectively meet the needs of public reporting, institutional financial management, and program planning. The group believes that the attainment of this goal requires uniformly…

  1. Management of lumbar zygapophysial (facet) joint pain

    Science.gov (United States)

    Manchikanti, Laxmaiah; Hirsch, Joshua A; Falco, Frank JE; Boswell, Mark V

    2016-01-01

    AIM: To investigate the diagnostic validity and therapeutic value of lumbar facet joint interventions in managing chronic low back pain. METHODS: The review process applied systematic evidence-based assessment methodology of controlled trials of diagnostic validity and randomized controlled trials of therapeutic efficacy. Inclusion criteria encompassed all facet joint interventions performed in a controlled fashion. The pain relief of greater than 50% was the outcome measure for diagnostic accuracy assessment of the controlled studies with ability to perform previously painful movements, whereas, for randomized controlled therapeutic efficacy studies, the primary outcome was significant pain relief and the secondary outcome was a positive change in functional status. For the inclusion of the diagnostic controlled studies, all studies must have utilized either placebo controlled facet joint blocks or comparative local anesthetic blocks. In assessing therapeutic interventions, short-term and long-term reliefs were defined as either up to 6 mo or greater than 6 mo of relief. The literature search was extensive utilizing various types of electronic search media including PubMed from 1966 onwards, Cochrane library, National Guideline Clearinghouse, clinicaltrials.gov, along with other sources including previous systematic reviews, non-indexed journals, and abstracts until March 2015. Each manuscript included in the assessment was assessed for methodologic quality or risk of bias assessment utilizing the Quality Appraisal of Reliability Studies checklist for diagnostic interventions, and Cochrane review criteria and the Interventional Pain Management Techniques - Quality Appraisal of Reliability and Risk of Bias Assessment tool for therapeutic interventions. Evidence based on the review of the systematic assessment of controlled studies was graded utilizing a modified schema of qualitative evidence with best evidence synthesis, variable from level I to level V

  2. Patterns of attachment of the myodural bridge by the rectus capitis posterior minor muscle.

    Science.gov (United States)

    Yuan, Xiao-Ying; Yu, Sheng-Bo; Li, Yun-Fei; Chi, Yan-Yan; Zheng, Nan; Gao, Hai-Bin; Luan, Bing-Yi; Zhang, Zhao-Xi; Sui, Hong-Jin

    2016-03-01

    The myodural bridge was first described by Hack in 1995 and was thought to be related to chronic cervicogenic headaches. For a long time, few studies revealed the patterns of the myodural bridge considering the rectus capitis posterior minor muscle. In this study, P45 plastination technology and anatomical dissection were performed on head specimens, and four different terminal region types of the rectus capitis posterior minor muscle were observed, including the posterior atlanto-occipital interspace, posterior arch of the atlas and posterior atlanto-axial interspace. We propose that the myodural complex structures in the posterior atlanto-occipital and posterior atlanto-axial interspace have cooperative effects on cerebrospinal fluid and work together. This force might be an important source for the circulation of cerebrospinal fluid. PMID:25859757

  3. A relationship between amount of joint effusion, disk displacement and presence of pain in the temporomandibular joint: MR imaging

    International Nuclear Information System (INIS)

    To correlate MR findings of amount of temporomandibular joint effusion with joint pain and disk displacement. In 57 patients, 114 temporomandibular joints with symptoms of disorder (presence of clinical pain) were imaged. Closed and open mouth sagittal spin echo (SE) T1-weighted images (WI) and fast spin echo (FSE) T2-WI were obtained. We classified the amount of joint effusion into grades. Joint effusion was classified as either Grade 1, 2 or 3, as follours : in sagittal FSE T2-WI, a long diameter of joint effusion shorter than 1/3 of the diameter of the convex margin of temporal eminence was grade 1 ; longer than 2/3 was grade 3 ; between grade 1 and 3 was grade 2. Disk displacement was classified as either with or without reduction in the open mouth position. These findings were correlated with one another and statistically analyzed. In 29 cases with joint pain (37%) and in 34 cases without pain (63%) there was no evidence of joint effusion ; there were, however, more grade 1 joint effusion cases with pain (14; 60.9%) than without pain (9; 39.1%). Cases of joint pain increased in proportion to grade of joint effusion, which was statistically significant (p < 0.05). In joints without disk displacement, the largest grouping was that which showed no effusion (39; 72.2%) ; no joints showed grade 3 effusion. Cases of joint effusion decreased in proportion to grade of effusion. In joints with disk displacement, cases of joint effusion tended to increase in proportion to the grade of effusion. MR findings of amount of temporomandibular joint effusion correlate with joint pain and anterior disk displacement

  4. Joint imaging in childhood and adolescence

    Energy Technology Data Exchange (ETDEWEB)

    Lopes Viana, Sergio [Hospital da Crianca de Brasilia - Jose Alencar Clinica Vila Rica (Brazil); Machado, Ribeiro, Maria Custodia [Hospital da Crianca de Brasilia - Jose Alencar Hospital de Base do Distrito Federal (Brazil); Beber Machado, Bruno [Clinica Radiologica Med Imagem, Unimed Sul Caprixaba, Santa Casa de Misericordia de Cachoeiro de Itapemirim (Brazil)

    2013-11-01

    First book to be devoted to the imaging of skeletally immature joints since the advent of cross-sectional methods. Covers a wide range of pathologic conditions. Identifies the advantages and weak points of each imaging method. Highlights anatomic and developmental peculiarities of the growing skeleton. Richly illustrated, with up-to-date references and summaries of key points. Since the advent of cross-sectional imaging methods, few works have been devoted to pediatric musculoskeletal imaging, and information is especially limited on the skeletally immature joint. Furthermore, reduced emphasis on pediatric training means that general radiologists are increasingly unfamiliar with normal and abnormal imaging findings in children and adolescents. Knowledge of the imaging appearances of the immature joint is, however, crucial for correct image interpretation. This book covers key selected topics in the imaging evaluation of the skeletally immature joint. The opening chapters consider the current role, advantages, and limitations of each modality in pediatric assessment and present the imaging appearances of anatomic and developmental peculiarities of the growing skeleton. Findings in a wide range of important conditions are then described in a series of richly illustrated chapters that document appearances on diverse imaging studies, from conventional radiography through to modern high-tech modalities. By presenting the essential information on imaging of the immature joint, the authors hope to provide radiologists (musculoskeletal specialists and generalists alike) with a new tool that will assist greatly in overcoming the daily challenges posed by interpretation of pediatric examinations in the twenty-first century. The book will also be of interest to all other specialists involved in the diagnosis and treatment of children and adolescents with articular complaints.

  5. Joint imaging in childhood and adolescence

    International Nuclear Information System (INIS)

    First book to be devoted to the imaging of skeletally immature joints since the advent of cross-sectional methods. Covers a wide range of pathologic conditions. Identifies the advantages and weak points of each imaging method. Highlights anatomic and developmental peculiarities of the growing skeleton. Richly illustrated, with up-to-date references and summaries of key points. Since the advent of cross-sectional imaging methods, few works have been devoted to pediatric musculoskeletal imaging, and information is especially limited on the skeletally immature joint. Furthermore, reduced emphasis on pediatric training means that general radiologists are increasingly unfamiliar with normal and abnormal imaging findings in children and adolescents. Knowledge of the imaging appearances of the immature joint is, however, crucial for correct image interpretation. This book covers key selected topics in the imaging evaluation of the skeletally immature joint. The opening chapters consider the current role, advantages, and limitations of each modality in pediatric assessment and present the imaging appearances of anatomic and developmental peculiarities of the growing skeleton. Findings in a wide range of important conditions are then described in a series of richly illustrated chapters that document appearances on diverse imaging studies, from conventional radiography through to modern high-tech modalities. By presenting the essential information on imaging of the immature joint, the authors hope to provide radiologists (musculoskeletal specialists and generalists alike) with a new tool that will assist greatly in overcoming the daily challenges posed by interpretation of pediatric examinations in the twenty-first century. The book will also be of interest to all other specialists involved in the diagnosis and treatment of children and adolescents with articular complaints.

  6. 77 FR 41877 - International Joint Commission; International Joint Commission To Hold Public Hearings on Lake...

    Science.gov (United States)

    2012-07-16

    ... of the International Joint Commission's Osoyoos Lake Order now posted on the IJC Web site at www.ijc... benefit of agriculture, tourism, municipal interests, and fisheries protection. Water levels of...

  7. Does generalized joint hypermobility predict joint injury in sport? A review.

    LENUS (Irish Health Repository)

    Donaldson, Peter R

    2012-02-01

    OBJECTIVE: To determine whether persons with generalized joint hypermobility have an increased risk of lower limb joint injury during sport. DATA SOURCES: PubMed, CINAHL, EMBASE, and SportDiscus were searched through February 2009, without language restrictions, using terms related to risk; hip, ankle, and knee injuries; and joint instability. Reference lists of included studies and relevant reviews were searched by hand. STUDY SELECTION: Selection criteria were peer-reviewed studies with a prospective design that used an objective scale to measure generalized joint hypermobility; the participants were engaged in sport activity, and the injury data were quantitative and based on diagnosis by a health professional, were self-reported, or resulted in time lost to athletic participation. The studies were screened by 1 researcher and checked by a second. Study methods were independently assessed by 2 investigators using the 6-point scale for prognostic studies developed by Pengel. Disagreements were resolved through discussion. Of 4841 studies identified, 18 met inclusion criteria. Of these, 8 were included in random-effects meta-analyses. DATA EXTRACTION: The data extracted by 2 reviewers included participant and sport characteristics and details of joint hypermobility and injury measurements. More detailed data for 4 investigations were obtained from the study authors. Where possible, hypermobility was defined as >\\/=4 of 9 points on the British Society of Rheumatology Scale (BSRS). MAIN RESULTS: Lower limb joint injuries (3 studies, 1047 participants) occurred in 14% of participants. Using the BSRS of joint hypermobility, any lower limb injury was not associated with hypermobility [odds ratio (OR), 1.43; 95% confidence interval (CI), 0.56-3.67]. Using the original authors\\' definitions, hypermobility was associated with risk of knee joint injuries (OR, 2.62; 95% CI, 1.04-6.58) in 5 studies. In 4 studies in which the BSRS could be used (1167 participants; incidence

  8. Durability of shrink joints; Bestaendighet hos krympskarvar

    Energy Technology Data Exchange (ETDEWEB)

    Forsaeus Nilsson, Stefan; Saellberg, Sven-Erik

    2007-07-01

    About one third of all joint failures are caused by shrink seals losing adhesion, according to statistics from the Swedish District Heating Association. The present project was initiated upon request from the Authorisation Board of the Swedish District Heating Association in order to investigate the potential to enhance the quality of shrink joints. The purpose has been to provide a screening of the key properties of the joint systems currently available on the market. The aim has been to facilitate the choice of right materials and constructions to achieve the best functionality and cost effectiveness. The project has comprised a compilation of the views from industry representatives from manufacturers of shrink and sealing materials, pipe producers, joint contractors and district heating companies, and an experimental study where a number of joints were evaluated with respect to tightness and strength. The following joint systems took part in the investigation: Logstor SX; Canusa SuperCase; Raychem RayJoint; Powerpipe DTK with external seal Nitto NeoCover 1150 in one end and Raychem TPSM in the other; Logstor B2S med external seal Canusa KLD in one end and Raychem TPSM in the other. The joints were installed on pipes of diameters 160 mm and 450 mm. The installation was done under cold and dirty conditions, to simulate a field like worst-case scenario. After the installation, the joints were tested with respect to tightness. Peel strength and shear strength were evaluated before and after thermal ageing in +50 deg C for 70 days. Mechanical tests and ageing followed standardised procedure in EN 12068. A study of the shrink force relaxation in crosslinked and non-crosslinked polyethylene shrink sleeves was undertaken, by shrinking them onto aluminium cylinders and storing them in room temperature for about 2000 hours. The results show that it is clearly possible to install excellent shrink joints also under difficult conditions. In addition, thermal ageing does not

  9. Effect of bending pattern on finger joint bending strength

    Directory of Open Access Journals (Sweden)

    Džinčić Igor

    2012-01-01

    Full Text Available Limited information is available on end gluing hardwoods in contrast to softwoods, which have been extensively investigated. The objective of this study was to examine the influence of bending patern on bending strength of finger jointed beech wood. In structural uses finger jointing is finally the major method to end joint timber for the production of glue-laminated elements. There are no bending strength experimental results for finger-jointed hardwoods for investigations conducted in Serbia. Two finger jointed profiles were studied in accordance with DIN68140. The finger joints were made by side and by face of beam. Length jointed samples were loaded at the side and in the face. The obtained results led to the conclusion that the direction of load, gluing surface and the position of joint influence on the strength of continued longitudinal beams.

  10. Easing Joint Pain: Are NSAIDs Right for You?

    Medline Plus

    Full Text Available Easing Joint Pain: Are NSAIDs Right for You? What are NSAIDs? When you have pain from arthritis or muscle ... NSAIDs work. If you have arthritis in your joints (osteo- arthritis) or another kind of chronic pain, ...

  11. The Cultural Context of Learning in International Joint Ventures.

    Science.gov (United States)

    Liu, Shimin; Vince, Russ

    1999-01-01

    A study of Chinese-Western joint business ventures showed that cultural context and different modes of managing and organizing must be considered. Successful joint ventures involve a process of collective, two-way learning. (SK)

  12. A combination of two diseases of the knee joint

    International Nuclear Information System (INIS)

    Status of the problem of joint and diagnosis of this disease are discussed. A case of biomedical radiography of knee joint of 72 y.o. man is described. The correct diagnosis was stated using routine biomedical radiography

  13. 49 CFR 230.30 - Lap-joint seam boilers.

    Science.gov (United States)

    2010-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Inspection and Repair § 230.30 Lap-joint seam boilers. Every boiler having lap-joint longitudinal...

  14. Joint experimentation results from Fleet battle experiment Foxtrot

    OpenAIRE

    Schacher, Gordon; Gallup, Shelley; Kimmel, Richard.; Sovereign, Michael

    2000-01-01

    Fleet Battle Experiments produce information that is relevant to Joint Experimentaion Objectives and Issues. This report presents an extraction of Joint Experimentation pertinent information from Fleet Battle Experiment Foxtrot.--Report Documentation Page. N0001401WR30407.

  15. PATHOLOGY OF TEMPOROMANDIBULAR-JOINT INTERNAL DERANGEMENT AND OSTEOARTHROSIS

    NARCIS (Netherlands)

    DEBONT, LGM; STEGENGA, B

    1993-01-01

    Temporomandibular joint (TMJ) osteoarthrosis and disk displacement seem to be strongly related, but they may also represent mutually independent temporomandibular disorders. This paper presents relevant aspects of normal physiology and degeneration of synovial joints, aspects of normal temporomandib

  16. MISR Level 3 Global Joint Aerosol monthly product V001

    Data.gov (United States)

    National Aeronautics and Space Administration — MISR Level 3 Global Joint Aerosol monthly product (Suggested Usage: This file contains MISR Level 3 Global Joint Aerosol monthly product, binned at 5 degree...

  17. Micro-structure and frictional characteristics of beetle's joint

    Institute of Scientific and Technical Information of China (English)

    DAI Zhendong; Stanislav N. Gorb

    2004-01-01

    Geometric and micro-structure design, tribology properties of beetle joints were experimentally studied, which aimed to enlighten ideas for the joint design of MEMS.The observation by using SEM and microscopy suggested that beetle's joints consist of a concave surface matched with a convex surface. The heads of the beetles, rubbing with flat glass, were tested in fresh and dried statuses and compared with sapphire ball with flat glass. Frictional coefficient of the joint material on glass was significantly lower than that of the sapphire sphere on glass. The material of the joint cuticle for convex surface is rather stiff (the elastic modulus 4.5 Gpa) and smooth. The surface is hydrophobic (the contact angle of distilled water was 88.3° ). It is suggested here that the high stiffness of the joint material and hydrophobicity of the joint surface are parts of the mechanism minimizing friction in insect joints.

  18. Radiographic observations of subtalar joint effusion in two children

    International Nuclear Information System (INIS)

    Recognition of the combination of retromalleolar swelling and talocalcaneal distraction seen on well positioned lateral radiographs of the ankle suggests the presence of subtalar joint distention, either in association with ankle joint abnormality or as an isolated finding. (orig.)

  19. Evaluation of Truview evo2® Laryngoscope In Anticipated Difficult Intubation-A Comparison To Macintosh Laryngoscope

    OpenAIRE

    Ishwar Singh; Abhijit Khaund; Abhishek Gupta

    2009-01-01

    Summary The aim of the study was to assess and compare laryngoscopic view of Truview evo2 laryngoscope with that of Macintosh laryngoscope in patients with one or more predictors of difficult intubation (PDI). Moreover ease of intubation with Truview evo2 in terms of absolute time requirement was also aimed at. Patients for elective surgery requiring endotracheal intubation were initially assessed for three PDI parameters – modified Mallampati test, thyro-mental distance & Atlanto-occipital (...

  20. Spherical Joint Piston and Connecting Rod Developed

    Science.gov (United States)

    1996-01-01

    Under an interagency agreement with the Department of Energy, the NASA Lewis Research Center manages a Heavy-Duty Diesel Engine Technology (HDET) research program. The overall program objectives are to reduce fuel consumption through increased engine efficiency, reduce engine exhaust emissions, and provide options for the use of alternative fuels. The program is administered with a balance of research contracts, university research grants, and focused in-house research. The Cummins Engine Company participates in the HDET program under a cost-sharing research contract. Cummins is researching and developing in-cylinder component technologies for heavy-duty diesel engines. An objective of the Cummins research is to develop technologies for a low-emissions, 55-percent thermal efficiency (LE-55) engine. The best current-production engines in this class achieve about 46-percent thermal efficiency. Federal emissions regulations are driving this technology. Regulations for heavy duty diesel engines were tightened in 1994, more demanding emissions regulations are scheduled for 1998, and another step is planned for 2002. The LE-55 engine emissions goal is set at half of the 1998 regulation level and is consistent with plans for 2002 emissions regulations. LE-55 engine design requirements to meet the efficiency target dictate a need to operate at higher peak cylinder pressures. A key technology being developed and evaluated under the Cummins Engine Company LE-55 engine concept is the spherical joint piston and connecting rod. Unlike conventional piston and connecting rod arrangements which are joined by a pin forming a hinged joint, the spherical joint piston and connecting rod use a ball-and-socket joint. The ball-and-socket arrangement enables the piston to have an axisymmetric design allowing rotation within the cylinder. The potential benefits of piston symmetry and rotation are reduced scuffing, improved piston ring sealing, improved lubrication, mechanical and thermal

  1. BIOLOGIC JOINT RECONSTRUCTION: ALTERNATIVES TO ARTHROPLASTY

    Directory of Open Access Journals (Sweden)

    Brian J. Cole

    2009-06-01

    Full Text Available A comprehensive source of information in the management of cartilage lesions of major joints using nonoperative or surgical techniques other than total joint replacement. The text also includes chapters in basic sciences, imaging and rehabilitation.The editors are aiming to provide a reference about the latest concepts and techniques in the treatment of cartilage lesions including future aspects by a comprehensive approach to the alternative joint restoration procedures such as biological, pharmacological and surgical techniques of cartilage repairing and partial resurfacing etc.Orthopedic surgeons in sports medicine, orthopedic surgeons performing joint replacements, orthopedic resident and fellows will be the main audiences.The text is 349 pages, divided into 34 chapters in 7 sections. Section I is "Background-articular cartilage and allograft processing" including chapters about pathology, patient evaluation, imaging and allograft processing. Section II is "Nonoperative treatment" including chapters about neutraceuticals, pharmacological treatment and rehabilitation. Section III is "Operative treatment-knee" including chapters about arthroscopic debridment, microfracture, osteochondral autograft transplantation, mosaicplasty, osteochondral autograft transfer, osteochondral allografts, autologous chondrocyte implantation, existing cell-based technologies, minimally invasive second-generation autologous chondrocyte implantation, future development in cartilage repair, meniscus transplantation, management of OCD, patellafemoral chondral disease, proximal tibial and distal femoral osteotomies, unicompartmental arthritis current techniques, unicompartmental knee replacement. Section IV is "Operative treatment-Hip" including chapters about hip arthroscopy and arthroscopic partial resurfacing, related osteotomies. Section V is "operative treatment-shoulder" including chapters about arthroscopic debridment and release, biologic resurfacing and

  2. Joint development as a value capture strategy in transportation finance

    OpenAIRE

    Zhao, Zhirong Jerry; Das, Kirti Vardhan; Larson, Kerstin

    2012-01-01

    This article examines joint development as a value capture strategy for funding public transportation. We start from the concept of joint development, its rationale, a brief history, and the extent of its use. Joint development projects in Hong Kong, Taiwan, Tokyo, and Thailand are profiled, as well as domestic examples in Washington, DC, New York, NY, and Portland, OR, etc. Then we provide a framework to classify joint development models by ownerships (public or private) and by types of trans...

  3. When Performance Trumps Gender Bias: Joint Versus Separate Evaluation

    OpenAIRE

    Bohnet, Iris; Van Geen, Alexandra Vivien; Max H. Bazerman

    2012-01-01

    We examine a new intervention to overcome gender biases in hiring, promotion, and job assignments: an “evaluation nudge,†in which people are evaluated jointly rather than separately regarding their future performance. Evaluators are more likely to focus on individual performance in joint than in separate evaluation and on group stereotypes in separate than in joint evaluation, making joint evaluation the money-maximizing evaluation procedure. Our findings are compatible with a behavioral ...

  4. Joint Mapping of Quantitative Trait Loci for Multiple Binary Characters

    OpenAIRE

    Xu, Chenwu; Li, Zhikang; Xu, Shizhong

    2005-01-01

    Joint mapping for multiple quantitative traits has shed new light on genetic mapping by pinpointing pleiotropic effects and close linkage. Joint mapping also can improve statistical power of QTL detection. However, such a joint mapping procedure has not been available for discrete traits. Most disease resistance traits are measured as one or more discrete characters. These discrete characters are often correlated. Joint mapping for multiple binary disease traits may provide an opportunity to ...

  5. Neutron Radiography Analysis of a Transient Liquid Phase Joint

    OpenAIRE

    Ballhausen, H.; Abele, H.; Eccleston, R. S.; Gaehler, R.; Smith, A. J.; A. Steuwer; Van Overberghe, A.

    2006-01-01

    Neutron radiography in many cases is the only non-destructive technique available for the analysis of a wide range of samples from metallurgy, materials engineering and materials testing. In this paper the potential of the technique is illustrated for a transient liquid phase (TLP) joint. TLP bonding produces interface free and stress free joints. The quality and properties of the joint depend on the diffusion of an interlayer into the base material. A TLP joint is visualised and the diffusio...

  6. Neuropathic midfoot deformity: associations with ankle and subtalar joint motion

    OpenAIRE

    Sinacore, David R; Gutekunst, David J; Hastings, Mary K.; Strube, Michael J; Bohnert, Kathryn L.; Prior, Fred W.; Johnson, Jeffrey E

    2013-01-01

    Background Neuropathic deformities impair foot and ankle joint mobility, often leading to abnormal stresses and impact forces. The purpose of our study was to determine differences in radiographic measures of hind foot alignment and ankle joint and subtalar joint motion in participants with and without neuropathic midfoot deformities and to determine the relationships between radiographic measures of hind foot alignment to ankle and subtalar joint motion in participants with and without neuro...

  7. Joint efficient ordering method for group multiobjective programming

    Institute of Scientific and Technical Information of China (English)

    HU Yuda; HU Didi

    2006-01-01

    This paper introduces the concepts of individual efficient pair and group efficient pair for each alternative in group multiobjective programming, and corresponding to these concepts defines the concepts of individual joint efficient preference and group joint efficient preference, respectively. Based on the fundamental properties of the mapping from individual joint efficient preference to group joint efficient preference and group efficient number of alternative, a method of ordering alternatives for group multiobjective programming problems is given.

  8. Essays on equity joint ventures, uncertainty and experience

    OpenAIRE

    Cuypers, I.R.P.

    2009-01-01

    Amidst increasingly global competition during the last decades, we observed a sharp increase in the number of joint ventures. As a result, joint ventures have triggered considerable enthusiasm in recent years among scholars and practitioners. However, studies have shown that most joint ventures fail to live up to their expectations. Foremost among the complexities that can explain their lack of success, several studies have identified the diverse sources of uncertainty surrounding the joint v...

  9. Equity Joint Ventures and Theory of the Multinational Enterprise

    OpenAIRE

    Paul W Beamish; John C Banks

    1987-01-01

    This paper extends the internalization approach to the theory of the multinational enterprise (MNE) to include an expanded role for equity joint ventures. Using the transaction cost paradigm of Williamson, this paper explains why joint ventures may sometimes be preferred over wholly owned subsidiaries. Also presented is empirical work on joint-venture performance in developing countries which demonstrates that under certain conditions joint ventures can be the optimal mode of foreign direct i...

  10. Why is joint attention a pivotal skill in autism?

    OpenAIRE

    Charman, Tony

    2003-01-01

    Joint attention abilities play a crucial role in the development of autism. Impairments in joint attention are among the earliest signs of the disorder and joint attention skills relate to outcome, both in the 'natural course' of autism and through being targeted in early intervention programmes. In the current study, concurrent and longitudinal associations between joint attention and other social communication abilities measured in a sample of infants with autism and related pervasive devel...

  11. The Role of Trust in Interorganizational Learning in Joint Ventures

    OpenAIRE

    Janowicz, M.K.; Noorderhaven, N.G.

    2002-01-01

    Learning from the partner is considered to be one of the most crucial processes in a joint venture context.Simultaneously numerous advantages of joint venture relationships characterized by trust between partners have been identified.This paper investigates the role of trust in knowledge transfer and assimilation, jointly leading to the learning outcome in an interorganizational context.Propositions linking sources of trust to the processes of knowledge transfer and assimilation in joint vent...

  12. Theoretical Methods for Wave Propagation across Jointed Rock Masses

    OpenAIRE

    Perino, A.; Zhu, J B; Li, J. C.; Barla, G.; Zhao, J.

    2010-01-01

    Different methods are presently available for the analysis of wave propagation across jointed rock masses with the consideration of multiple wave reflections between joints. These methods can be divided into two categories. One is based on the displacement discontinuity model for representing rock joints, where the displacements across a joint are discontinuous and the tractions are continuous, and the other is the equivalent medium method. For the first category, there are three methods, i.e...

  13. Generalized infection following facet joint injection -A case report-

    OpenAIRE

    Kim, Sae Young; Han, Sung Ho; Jung, Min Woo; Hong, Ji Hee

    2010-01-01

    Facet joints have been shown to be a source of chronic low back pain, and it is generally accepted in clinical practice that diagnostic and therapeutic facet joint injections are the most reliable technique for the treatment of facet joint pain, which is considered to be an easy and safe procedure. Serious complications and side effects are uncommon after facet joint injection. However, infectious complications including septic arthritis, epidural abscess, meningitis and endocarditis have bee...

  14. 49 CFR 192.287 - Plastic pipe: Inspection of joints.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Plastic pipe: Inspection of joints. 192.287... Than by Welding § 192.287 Plastic pipe: Inspection of joints. No person may carry out the inspection of joints in plastic pipes required by §§ 192.273(c) and 192.285(b) unless that person has been qualified...

  15. 46 CFR 61.15-12 - Nonmetallic expansion joints.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Nonmetallic expansion joints. 61.15-12 Section 61.15-12... INSPECTIONS Periodic Tests of Piping Systems § 61.15-12 Nonmetallic expansion joints. (a) Nonmetallic expansion joints must be examined externally at each inspection for certification and periodic...

  16. 15 CFR 296.7 - Joint venture registration.

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Joint venture registration. 296.7 Section 296.7 Commerce and Foreign Trade Regulations Relating to Commerce and Foreign Trade NATIONAL... PROGRAM General § 296.7 Joint venture registration. Joint ventures selected for assistance under...

  17. 77 FR 69619 - Draft Recommendations of Joint Outreach Team

    Science.gov (United States)

    2012-11-20

    ... Area Power Administration Draft Recommendations of Joint Outreach Team AGENCY: Western Area Power Administration, DOE. ACTION: Notice of Availability of draft recommendations of Western/DOE Joint Outreach Team... Department of Energy (DOE), is publishing the draft recommendations of the Western/DOE Joint Outreach...

  18. 21 CFR 888.3230 - Finger joint polymer constrained prosthesis.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Finger joint polymer constrained prosthesis. 888... constrained prosthesis. (a) Identification. A finger joint polymer constrained prosthesis is a device intended... generic type of device includes prostheses that consist of a single flexible across-the-joint...

  19. 21 CFR 872.3940 - Total temporomandibular joint prosthesis.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Total temporomandibular joint prosthesis. 872.3940... prosthesis. (a) Identification. A total temporomandibular joint prosthesis is a device that is intended to be... and Drug Administration on or before March 30, 1999, for any total temporomandibular joint...

  20. How to establish and sustain a joint venture in China.

    Science.gov (United States)

    Lee, Paul

    2008-01-01

    Joint ventures with Chinese companies provide one of the most effective ways for international companies to establish a foothold in the booming Chinese economy. The benefits, opportunities and challenges of establishing a joint venture are explored here. Current partnering trends and successful Sino-foreign joint ventures in the fast-growing medical device industry in China are also highlighted. PMID:18605293

  1. 49 CFR 236.752 - Joint, rail, insulated.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Joint, rail, insulated. 236.752 Section 236.752..., MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES Definitions § 236.752 Joint, rail, insulated. A joint in which electrical insulation is provided between adjoining rails....

  2. 49 CFR 234.235 - Insulated rail joints.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Insulated rail joints. 234.235 Section 234.235..., DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Maintenance, Inspection, and Testing Maintenance Standards § 234.235 Insulated rail joints. Each insulated rail joint...

  3. 49 CFR 236.59 - Insulated rail joints.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Insulated rail joints. 236.59 Section 236.59..., MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES Rules and Instructions: All Systems Track Circuits § 236.59 Insulated rail joints. Insulated rail joints shall be...

  4. Wear analysis of revolute joints with clearance in multibody systems

    Science.gov (United States)

    Bai, ZhengFeng; Zhao, Yang; Wang, XingGui

    2013-08-01

    In this work, the prediction of wear for revolute joint with clearance in multibody systems is investigated using a computational methodology. The contact model in clearance joint is established using a new hybrid nonlinear contact force model and the friction effect is considered by using a modified Coulomb friction model. The dynamics model of multibody system with clearance is established using dynamic segmentation modeling method and the computational process for wear analysis of clearance joint in multibody systems is presented. The main computational process for wear analysis of clearance joint includes two steps, which are dynamics analysis and wear analysis. The dynamics simulation of multibody system with revolute clearance joint is carried out and the contact forces are drawn and used to calculate the wear amount of revolute clearance joint based on the Archard's wear model. Finally, a four-bar multibody mechanical system with revolute clearance joint is used as numerical example application to perform the simulation and show the dynamics responses and wear characteristics of multibody systems with revolute clearance joint. The main results of this work indicate that the contact between the joint elements is wider and more frequent in some specific regions and the wear phenomenon is not regular around the joint surface, which causes the clearance size increase non-regularly after clearance joint wear. This work presents an effective method to predict wear of revolute joint with clearance in multibody systems.

  5. Heat-shrinkable sleeve aids in insulating universal joints

    Science.gov (United States)

    Green, W. S.; Thompson, F. W.

    1980-01-01

    Tubing stiffens joint so that it can be alined with spline fitting; unsleeved joint would normally droop, making it difficult to attach to splines. Sleeve technique saves time and effort when assembling nonrigid parts by making special holding tools or fixtures unnecessary. Tubing also protects joint from dust and other contamination.

  6. Universal bellows joint restraint permits angular and offset movement

    Science.gov (United States)

    Kuhn, R. F., Jr.

    1965-01-01

    Universal joint-type restraint that employs ball joints permits maximum angular and lateral offset movement in a bellows joint without danger of rupture or pressure drop in the line. It is used in high pressure and high temperature applications in refineries, steam plants, or stationary power plants.

  7. Discovery of columnar jointing on Mars

    Science.gov (United States)

    Milazzo, M.P.; Keszthelyi, L.P.; Jaeger, W.L.; Rosiek, M.; Mattson, S.; Verba, C.; Beyer, R.A.; Geissler, P.E.; McEwen, A.S.

    2009-01-01

    We report on the discovery of columnar jointing in Marte Valles, Mars. These columnar lavas were discovered in the wall of a pristine, 16-km-diameter impact crater and exhibit the features of terrestrial columnar basalts. There are discontinuous outcrops along the entire crater wall, suggesting that the columnar rocks covered a surface area of at least 200 km2, assuming that the rocks obliterated by the impact event were similarly jointed. We also see columns in the walls of other fresh craters in the nearby volcanic plains of Elysium Planitia-Amazonis Planitia, which include Marte Vallis, and in a well-preserved crater in northeast Hellas. ?? 2009 The Geological Society of America.

  8. The joint action on healthy life years

    DEFF Research Database (Denmark)

    Robine, Jean-Marie; Cambois, Emmanuelle; Nusselder, Wilma;

    2013-01-01

    ABSTRACT: BACKGROUND: Life expectancy has been increasing during the last century within the European Union (EU). To measure progress in population health it is no longer sufficient to focus on the duration of life but quality of life should be considered. Healthy Life Years (HLY) allow estimating...... the quality of the remaining years that a person is expected to live, in terms of being free of long-standing activity limitation. The Joint Action on Healthy Life Years (JA: EHLEIS) is a joint action of European Member States (MS) and the European Union aiming at analysing trends, patterns and...... differences in HLY, as well as in other Summary Measures of Population Health (SMPH) indicators, across the European member states. METHODS: The JA: EHLEIS consolidates existing information on life and health expectancy by maximising the European comparability; by analysing trends in HLY within the EU; by...

  9. Surgery of temporomandibular joint under local anaesthesia

    Directory of Open Access Journals (Sweden)

    Gajiwala Kalpesh

    2008-01-01

    Full Text Available Temporomandibular joint ankylosis is a debilitating disorder arising from an inability to open the mouth. This leads to poor nutrition, poor dental hygiene, and stunted growth. Anaesthesia, especially general anaesthesia, is very difficult to administer. There is a lack of direct visualization of the vocal cords, tongue fall following relaxation, and an already narrowed passage due to a small mandible, which makes even the blind nasal intubation difficult. There are various techniques described in literature to overcome these challenges, failing which, one needs to do tracheostomy. All the risks of difficult intubation and general anaesthesia can be avoided if the surgery is done under local anaesthesia. A simple but effective method of successful local anaesthesia is described, which allows successful temporomandibular joint reconstruction.

  10. Subtalar joint instability: current clinical concepts.

    Science.gov (United States)

    Budny, Adam

    2004-07-01

    There has been extensive research and investigation into the subtalar joint (STJ), yet the biomechanics that relate to its anatomic function, especially instability after injury, are surrounded by controversy. With a mechanism of injury closely related to the classic inversion ankle sprain, chronic instability can result following trauma to the lateral ligamentous support network of either joint. Over the past decades there have been countless examples in the literature challenging the current standard of evaluation and treatment of the "subtalar sprain." New technologies have offered varied approaches to diagnostic capability, each with its own strengths and weaknesses, ranging from standard radiographs to CT and MRI. A review of the literature should aid in deciphering the controversy surrounding this aspect of podiatric medicine. PMID:15246150

  11. Equivalent dynamic model of DEMES rotary joint

    Science.gov (United States)

    Zhao, Jianwen; Wang, Shu; Xing, Zhiguang; McCoul, David; Niu, Junyang; Huang, Bo; Liu, Liwu; Leng, Jinsong

    2016-07-01

    The dielectric elastomer minimum energy structure (DEMES) can realize large angular deformations by a small voltage-induced strain of the dielectric elastomer (DE), so it is a suitable candidate to make a rotary joint for a soft robot. Dynamic analysis is necessary for some applications, but the dynamic response of DEMESs is difficult to model because of the complicated morphology and viscoelasticity of the DE film. In this paper, a method composed of theoretical analysis and experimental measurement is presented to model the dynamic response of a DEMES rotary joint under an alternating voltage. Based on measurements of equivalent driving force and damping of the DEMES, the model can be derived. Some experiments were carried out to validate the equivalent dynamic model. The maximum angle error between model and experiment is greater than ten degrees, but it is acceptable to predict angular velocity of the DEMES, therefore, it can be applied in feedforward–feedback compound control.

  12. Early arthrosis of the digital joints

    International Nuclear Information System (INIS)

    Arthrosis of the digital joints begins predominantly on the volar joint surface and the volar-proximal margin of the head. Because of this localisation, and in order to obtain adequate contrast and definition, these early changes are best shown by means of low R.V. radiographs in three views. The early changes consist of the following local processes: intrachondral sclerosis, exomarginal and endomarginal subchondral sclerosis, discreet increase in the spongiosa; this leads to disrounding and hooklike form of the head; thickening or disappearance of the sub-marginal spongiosa and marginal defects. Artifacts produced by the projections or local bone variants must be recognised, as well as diffuse idiopathic skeletal hyperostosis. (orig.)

  13. Early arthrosis of the digital joints

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, E.

    1984-05-01

    Arthrosis of the digital joints begins predominantly on the volar joint surface and the volar-proximal margin of the head. Because of this localisation, and in order to obtain adequate contrast and definition, these early changes are best shown by means of low R.V. radiographs in three views. The early changes consist of the following local processes: intrachondral sclerosis, exomarginal and endomarginal subchondral sclerosis, discreet increase in the spongiosa; this leads to disrounding and hooklike form of the head; thickening or disappearance of the sub-marginal spongiosa and marginal defects. Artifacts produced by the projections or local bone variants must be recognised, as well as diffuse idiopathic skeletal hyperostosis. 21 figs.

  14. Histological development of human foetal shoulder joint

    Directory of Open Access Journals (Sweden)

    Sabia Nazir

    2014-02-01

    Results: The bony structures - head of humerus and glenoid fossa and joint cavity appear by 10 weeks which prolongs into bicipital sulcus by 12-1/2 weeks. Synovial tissue appears by 10 weeks and synovial villi appear by 14 weeks. Glenoid labrum, capsular ligament, coracohumeral ligament and superior glenohumeral ligament are seen by 10 weeks. Middle glenohumeral ligament is seen at 12-1/2 weeks while inferior glenohumeral ligament is seen at 14 weeks. Tendon of biceps is seen at 10 weeks. Conclusions: By 10 weeks of gestational age various structures of shoulder joint develop in situ, resembling in form and arrangement as those of adults. From these early stages, development proceeds rapidly to achieve adult characteristics. There are no intermediate stages in between where structures similar to those of lower forms i.e. syn/amphi artroses appear temporarily. [Int J Res Med Sci 2014; 2(1.000: 293-299

  15. Towards joint decoding of Tardos fingerprinting codes

    CERN Document Server

    Meerwald, Peter

    2011-01-01

    The class of joint decoder of probabilistic fingerprinting codes is of utmost importance in theoretical papers to establish the concept of fingerprint capacity. However, no implementation supporting a large user base is known to date. This paper presents an iterative decoder which is, as far as we are aware of, the first practical attempt towards joint decoding. The discriminative feature of the scores benefits on one hand from the side-information of previously accused users, and on the other hand, from recently introduced universal linear decoders for compound channels. Neither the code construction nor the decoder make precise assumptions about the collusion (size or strategy). The extension to incorporate soft outputs from the watermarking layer is straightforward. An intensive experimental work benchmarks the very good performances and offers a clear comparison with previous state-of-the-art decoders.

  16. Transversely Compressed- and Restrained Shear Joints

    DEFF Research Database (Denmark)

    Schmidt, Jacob Wittrup; Hansen, Christian Skodborg

    2013-01-01

    Anchorage of FRP strengthening systems where the deformation perpendicular to the FRP material is restrained or a compressive force is applied on the strengthening, seems to provide ductility, increased utilization of the FRP and failure modes which can be controlled through the anchorage method....... This paper presents theoretical model which can predict the response of transversely compressed and restrained single- and double lap shear joints. The interface material model is based on a cohesive law in the shear-slip plane with a descending branch and a uniform frictional stress added due to the...... friction in the crack, emanating from the transverse pressure or restraint. The theoretical model is compared with experimental results from transversely compressed single- and double shear joints. Also theoretical predictions of a mechanical integrated sleeve-wedge anchorage load capacity are carried out...

  17. Imaging methods for knee-joint diagnostics

    International Nuclear Information System (INIS)

    Imaging methods are essential tools for orthopedic diagnostics. For examination of knee-joint disorder, X-ray radiography in four planes is a standard task. Special diagnostic methods are available and can be selected according to the case, and sonography is a method very likely to gain significance. In case of suspected fracture, conventional tomography is the method of choice, although arthroscopy is discussed in this context as a primary examination. CT or NMR imaging are indicated for evaluation of tumors near the knee joint, and latest results show that magnetic resonance tomography is useful for examination of the cruciate ligaments or the cartilage, and CT for imaging of the menisci. CT assisted arthrography for sliding path and cartilage analysis already is an established method for diagnostic evaluation of the chondropathia patellae. (orig./MG)

  18. Magnetic resonance imaging in joint diseases

    International Nuclear Information System (INIS)

    Magnetic resonance imaging has proven an invaluable method in the diagnosis of joint diseases associated with osteonecrotic, inflammatory, traumatic and degenerative processes. At the clinical level, it has an important role in decisions about the method of treatment and evaluations of the therapeutic success. When the merits of MRT are balanced against those of conventional radiography including tomography and CT, which both ensure better spatial resolution in the visualisation of cortical and spongy bone structures, it becomes quite evident that MRT must not be regarded as an alternative method of imaging but as one that can be used additionally to obtain the most information for the diagnosis of arthropathy. The question as to whether new pulse sequences (snap shots) or invasive techniques like intra-articular injection of paramagnetic substances (MR arthrography) are likely to become routine procedures in the detection of joint diseases using MRT remains to be examined in further studies. (orig.)

  19. Microstructures of 2219 twin wire welded joints

    Institute of Scientific and Technical Information of China (English)

    Xu Wenli; Li Qingfen; Meng Qingguo; Gao Na; Fang Hongyuan

    2005-01-01

    With thick plates of 2219 high-strength alloy, the microstructures of welded joints with twin wire MIG welding were analyzed. Experimental results show that no hot crack was found in the weld due to discontinuous distribution of cocrystallization with low melting temperature, but porosity is serious in the first weld seam that is mainly composed of equiaxial grains with uneven sizes. As the poor position of the whole welded joint, fusion zone has big and coarse grains,uneven microstructures ; In quenching zone, there exist a lot of soaked microstructures that cocrystallization with low melting temperature solute into matrix, thus strengthening the metal in this zone; In excessive aging zone, much more phases that distribute evenly will be separated from the matrix; Outside this zone, properties and microstructures of the metal are basically similar to matrix due to the relatively low temperature or unaffected heat in the zone during welding.

  20. Space Station Solar Array Joint Repair

    Science.gov (United States)

    Loewenthal, Stuart; Allmon, Curtis; Reznik, Carter; McFatter, Justin; Davis, Robert E.

    2015-01-01

    In Oct 2007 the International Space Station (ISS) crew noticed a vibrating camera in the vicinity of Starboard Solar Alpha Rotary Joint (SARJ). It had less than 5 months of run time when the anomaly was observed. This approximately 3.2 meter diameter bearing joint supports solar arrays that power the station critical to its operation. The crew performed an EVA to identify what was causing the vibration. It was discovered that one of the 3 bearing tracks of this unconventional bearing had significant spalling damage. This paper discusses the SARJ's unique bearing design and the vulnerability in its design leading to the observed anomaly. The design of a SARJ vacuum test rig is also described along with the results of a life test that validated the proposed repair should extend the life of the SARJ a minimum of 18 years on-orbit.

  1. Bone marrow edema of the knee joint

    International Nuclear Information System (INIS)

    Bone marrow edema of the knee joint is a frequent clinical picture in MR diagnostics. It can be accompanied by symptoms and pain in the joint. Diseases that are associated with bone marrow edema can be classified into different groups. Group 1 includes vascular ischemic bone marrow edema with osteonecrosis (synonyms: SONK or Ahlbaeck's disease), osteochondrosis dissecans, and bone marrow edema syndrome. Group 2 comprises traumatic or mechanical bone marrow edema. Group 3 encompasses reactive bone marrow edemas such as those occurring in gonarthrosis, postoperative bone marrow edemas, and reactive edemas in tumors or tumorlike diseases. Evidence for bone marrow edema is effectively provided by MRI, but purely morphological MR information is often unspecific so that anamnestic and clinical details are necessary in most cases for definitive disease classification. (orig.)

  2. [Concomitant diseases in primary joint hypermobility syndrome].

    Science.gov (United States)

    Skoumal, Martin; Haberhauer, Günther; Mayr, Hans

    2004-10-15

    The primary joint hypermobility syndrome (pJH) is an overlap disorder of connective-tissue dysplasias, which incorporates features seen in the Marfan syndromes (MFS), Ehlers-Danlos syndromes (EDS), and osteogenesis imperfecta. Patients with pJH usually present arthralgia, back pain, soft-tissue lesions, recurrent joint dislocation, or subluxation. Extraarticular features may include, e. g., striae cutis, keratoconus, easy bruising, mitral valve prolapse, aortic incompetence, aneurysms, pneumothorax, hernia, urinary incontinence, and pelvic floor prolapse. Due to the high frequency of critical dissection and rupture, the early recognition of rare life-threatening complications such as dilatation of the aortic root and aneurysms is important. Therefore, patients (and their family members) with pJH should also be examined for life-threatening features seen in MFS and EDS. PMID:15490074

  3. Joint hypermobility: emerging disease or illness behaviour?

    Science.gov (United States)

    Grahame, Rodney

    2013-12-01

    Joint hypermobility syndrome is a common clinical entity which is much misunderstood, overlooked, misdiagnosed and mistreated. It was first described in the 1960s as a purely musculoskeletal condition due to joint laxity and hypermobility occurring in otherwise healthy individuals. Some four decades later it is now perceived to be a multi-systemic heritable disorder of connective tissue with manifestations occurring far beyond the confines of the locomotor system and with ramifications potentially affecting most, if not all, of the bodily systems in one way or another. Most authorities in the field find it clinically indistinguishable from the Ehlers-Danlos syndrome--hypermobility type (formerly, EDS type III). In >50% of patients the diagnosis is delayed for ≥10 years. Failure to diagnose and treat the condition correctly results in needless pain and suffering and in many patients to a progressive decline in their quality of life and in some to a loss of independence. PMID:24298184

  4. Adhesive joint and composites modeling in SIERRA.

    Energy Technology Data Exchange (ETDEWEB)

    Ohashi, Yuki; Brown, Arthur A.; Hammerand, Daniel Carl; Adolf, Douglas Brian; Chambers, Robert S.; Foulk, James W., III (.,; )

    2005-11-01

    Polymers and fiber-reinforced polymer matrix composites play an important role in many Defense Program applications. Recently an advanced nonlinear viscoelastic model for polymers has been developed and incorporated into ADAGIO, Sandia's SIERRA-based quasi-static analysis code. Standard linear elastic shell and continuum models for fiber-reinforced polymer-matrix composites have also been added to ADAGIO. This report details the use of these models for advanced adhesive joint and composites simulations carried out as part of an Advanced Simulation and Computing Advanced Deployment (ASC AD) project. More specifically, the thermo-mechanical response of an adhesive joint when loaded during repeated thermal cycling is simulated, the response of some composite rings under internal pressurization is calculated, and the performance of a composite container subjected to internal pressurization, thermal loading, and distributed mechanical loading is determined. Finally, general comparisons between the continuum and shell element approaches for modeling composites using ADAGIO are given.

  5. MR arthrography of the hip joint

    International Nuclear Information System (INIS)

    MR arthrography of the hip joint is usually performed after a conventional MRI has been obtained to rule out other pathologies of the hip joint as for instance bone marrow edema or osteonecrosis of the hip. MR arthrography is mainly performed as a very special investigation, and it is executed in most cases if the clinician asks for the diagnosis of a labral lesion. In very rare cases, MR arthrography of the hip is performed to image cartilage disease or osteochondrosis dissecans or free intraarticular bodies. In this paper, the indications, the technique, and the most important pathology of the hip joint - labral lesions - will be described as well as variants of the normal acetabular labrum. After a conventional MRI of the hip joint has been performed, a MR arthrography of the hip will be obtained to search for labral pathology or cartilage disease. MR arthrography is obtained after the intraarticular injection of 10-20 ml of a 0.1 mmol solution of gadopentate-dimeglumine has been performed. The intraarticular injection can either be fluoroscopic-guided or CT-guided or directly MR-guided. After the intraarticular injection, MR arthrography will be performed by the use of paracoronal and parasagittal T1-weighted spin echo or gradient echo sequences. In cases of labral lesions (degeneration, labral tear, labral detachment) or cartilage disease MR arthrography proved to be more sensitive as conventional MRI as shown in the literature. The sensitivity of MRI to detect labral pathology was reported to be about 65%, and that of MR arthrography was reported to be about 92-95% compared to surgical results. According to the current literature, MR arthrography is the most sensitive method to delineate these kind of pathologies. Therefore, the invasive technique of MR arthrography may be justified for the correct diagnosis of these kind of pathologies after other pathologic entities have been ruled out by conventional MRI. (orig.)

  6. Surface structured bonded composite-metal joint

    OpenAIRE

    Di Giandomenico, Vincenzo

    2014-01-01

    The design of structural joints is one of the critical challenges for the development of composite lightweight aircraft and motorsport structures. Despite the universal reliance upon mechanical fastening and adhesive bonding, the disadvantages of both when applied to high stiffness composites are considerable. For bolting and riveting these include added weight as laminates are thickened to account for stress concentrations. For bonding these include chemical uncertainties o...

  7. ARTHROSCOPY OF THE SCAPULOTHORACIC JOINT: CASE REPORTS

    OpenAIRE

    Andreoli, Carlos Vicente; Ejnisman, Benno; Pochini, Alberto de Castro; Monteiro, Gustavo Cará; Cohen, Moisés; Faloppa, Flávio

    2015-01-01

    Scapulothoracic arthroscopy is a procedure presenting restricted indications, for resecting free bodies, benign tumors, bursitis, and snaping scapula. The authors report four cases of scapulothoracic joint arthroscopy; in the first case, only a benign tumor (osteochondroma) could be visualized; in the second case, arthroscopic resection of an osteochondroma was found; in the third case, arthroscopic bursectomy due to scapulothoracic bursitis, and; in the fourth case, bursectomy and partial su...

  8. INCIDENTAL AND JOINT CONSUMPTION IN RECREATION DEMAND

    OpenAIRE

    Parsons, George R.; Wilson, Aaron J.

    1997-01-01

    A theory for analyzing incidental consumption in a single site recreation demand model is presented. We show that incidental consumption on a recreation trip, such as a visit to see friends or a visit to a second recreation site, can be treated as a complementary good and analyzed using conventional theory. We also show that the analysis applies whether the side trips are incidental or joint. In a simple application we find that failing to account for incidental consumption appears to create ...

  9. Component method for historical timber joints

    Czech Academy of Sciences Publication Activity Database

    Wald, F.; Mareš, J.; Sokol, Z.; Drdácký, Miloš

    Dordrecht : Kluwer Academic Publ., 2000 - (Baniotopoulos, C.; Wald, F.), s. 417-424 ISBN 0-7923-6701-4. [The Paramount role of joints into the reliable response of structures. Ouranoupolis (GR), 21.05.2000-23.05.2000] R&D Projects: GA ČR GA103/97/S051 Institutional research plan: CEZ:AV0Z2071913 Keywords : historical timber * modulus of elasticity Subject RIV: AL - Art, Architecture, Cultural Heritage

  10. The survey of anterior joint experiment works

    International Nuclear Information System (INIS)

    In the report main phases and result of works fulfilled by Soviet and American scientists in Kazakstan during 1986-1987 years according agreement reached between the Soviet Academy of Sciences and the US natural Resources Defense Council are given. The natural earth noise and seismic signals on the 3 created stations nearby Karkaralinsk, Bayanaul and Karasu located in vicinity Semipalatinsk test site were investigated. Fulfilled first joint stock complex investigations convincingly demonstrate possibilities of the seismic methods for nuclear test ban verification

  11. Locked volar distal radioulnar joint dislocation

    Science.gov (United States)

    Bouri, Fadi; Fuad, Mazhar; Elsayed Abdolenour, Ayman

    2016-01-01

    Introduction Volar dislocation of the distal radioulnar joint is a rare injury which is commonly missed in the emergency departments. A thorough review of literature showed very few reported cases and the cause for irreducibility varied in different cases, Lack of suspicion and improper X-ray can delay the diagnosis. Case presentation Our article discusses a case 40 year old construction worker, who presented to the Emergency with work-related injury, complaining of left wrist pain, deformity and inability to rotate his forearm. X-rays revealed a volar dislocation of distal ulna which was reducible after manipulation under General Anesthesia (GA). The joint was stable after the reduction. Discussion Isolated dislocation of the distal radioulnar joint can be either volar or dorsal, although dorsal dislocation is more common. The distal radioulnar articulation plays an important role in the rotational movement of the forearm. It allows pronation and supination which are essential for the function of the upper limb. Pronator Quadratus muscle spasm is an important blockade to reduction and was preventing reduction in this case. Methods The work has been reported in line with the CARE criteria [9]. Conclusion Volar locked dislocation of Distal Radio ulnar joint is a rare injury. High degree of clinical suspicion and proper X-ray is required for prompt detection. The importance of this case is to raise the awareness among physicians in treating these kind of injuries by careful assessment of the patient and radiographs, and to consider pronator quadratus as an important cause for the blockade to reduction. PMID:27016647

  12. Joint diseases in animal paleopathology: Veterinary approach

    OpenAIRE

    Oliver Stevanović,; Maciej Janeczek,; Aleksander Chrószcz; Nemanja Marković

    2015-01-01

    Animal paleopathology is not a very well known scientific discipline within veterinary science, but it has great importance for historical and archaeological investigations. In this paper, authors attention is focused on the description of one of the most common findings on the skeletal remains of animals - osteoarthropathies. This review particularly emphasizes the description and classification of the most common pathological changes in synovial joints. The authors have provided their obser...

  13. Synostosis of the Proximal Tibiofibular Joint

    OpenAIRE

    2010-01-01

    The incidence of synostosis of the proximal tibiofibular joint (TFJ) was assessed among 1029 patients examined for osteoarthritis of the knee in a 4-year period. Radiographic evidence of a synostosis of the proximal TFJ was demonstrated in 3 knees (3 patients). The synostosis appeared incidental and was not the cause of symptoms in any of them. These patients were further examined with MRI and/or CT scans. In two cases, which were found to be primary (idiopathic), the synostosis was complete ...

  14. Industrial Solid Waste Management and Joint Production

    OpenAIRE

    Stenis, Jan

    2002-01-01

    The study illustrates how joint production theory can be applied in estimating the profitability of fractionating industrial solid wastes, a given product and the wastes produced in connection with its manufacture being regarded as a production-planning unit. Two case studies showing how the approach described can be applied both to bulk manufacturing and to the manufacture of technically complicated products are presented. The realism of this approach and the contribution it can make to opti...

  15. Roentgenological semiotics of joint involvement in psoriasis

    International Nuclear Information System (INIS)

    The paper is concerned with the results of an X-ray study of the osteoarticular system of 103 patients with arthropathic psoriasis. Four types of disease: psoriatic polyarthritis, psoriatic polyarthrosis, psoriatic arthropathy and a mixed or combined form (the combination of inflammatory and degenerative-dystrophic changes) - were defined on the basis of X-ray findings. Roentgenological semiotics of these forms of arthropathic psoriasis with the frequency of the involvement of some joints and elements of differential radiodiagnosis was proposed

  16. Pension reform and couples' joint retirement decisions

    OpenAIRE

    Hospido, Laura

    2015-01-01

    Rising life expectancy and the growing fiscal insolvency of public pension systems have prompted many developed countries to raise the pension entitlement age. The success of such policies depends on the responsiveness of individuals to such changes. Retirement has increasingly become a decision made jointly by a couple rather than individually by one partner. The empirical evidence indicates that almost a third of dual-earner couples in Europe and the US coordinate their retirement decision ...

  17. Radiographic assessment of knee joint rotation.

    OpenAIRE

    Straiton, J A; Todd, B; Venner, R M

    1987-01-01

    A radiographic technique for measuring conjunct rotation at the knee joint is described. Conjunct rotation was demonstrated to occur over a greater range of values of flexion than conventionally believed. Rotation increased progressively as the knee extended, and was not confined to the last phase of extension. Consideration of such rotatory movement is relevant to the design of knee arthroplasties and also to possible mechanisms of non-bony injury of the knee.

  18. Joint Research Centre. Ispra establishment-Italy

    International Nuclear Information System (INIS)

    A comprehensive review of the work carried out during 1974 and 1975 in the Ispra establishment of the Joint Research Centre is presented. A description of the activity carried out within the context of the running programmes is given. Some of the most relevant scientific and technical achievement are described from the viewpoints of the Scientific Departments of the Centre. The technical and administrative support activities are also presented. A list of publications issued by the Ispra Scientific staff is given

  19. Timber joints under long-term loading

    DEFF Research Database (Denmark)

    Feldborg, T.; Johansen, M.

    This report describes tests and results from stiffness and strength testing of splice joints under long-term loading. During two years of loading the spicimens were exposed to cyclically changing relative humidity. After the loading period the specimens were short-term tested. The connectors were...... integral nail-plates and nailed steel and plywood gussets. The report is intended for designers and researchers in timber engineering....

  20. Normal joint mobility in mitral valve prolapse

    OpenAIRE

    Marks, J S; Sharp, J.; Brear, S. G.; Edwards, J. D.

    1983-01-01

    Thirty-seven adults (19 male, 18 female) with mitral valve prolapse (MVP) were examined for evidence of joint hypermobility scored on a 0-9 scale. None of the patients had hypermobility scores exceeding 3, and comparison with 37 healthy age and sex matched controls recruited from hospital staff failed to show an increased prevalence of hypermobility in MVP. There was no evidence that the MVP syndrome is a forme fruste of a heritable disorder of connective tissue.

  1. Medical images of the hip joint

    International Nuclear Information System (INIS)

    Up-to date techniques of sectional imaging of selected planes and ultrasonic methods have contributed considerably to improved diagnostic accuracy in the identification of hip joint anomalies in infants. Even though these innovations deserve to be valued highly the more conventional diagnostic methods are far from being superfluous and continue to be used on a routine basis in radiology. The relevant methods of focussing and ranges of use for standard and special projections are therefore surveyed in the following. (orig./GDG)

  2. Sternoclavicular joint swellings: diagnosis and management.

    Science.gov (United States)

    Searle, A E; Gluckman, P; Sanders, R; Breach, N M

    1991-01-01

    Five patients with sternoclavicular swellings are described. The group presents a variety of diagnoses which highlight the need for thorough investigation and appropriate management of swellings around the sternoclavicular joint. Although frequently assumed to be benign, this series demonstrates the potential occurrence of malignant disease, and the dangers of pursuing a simple conservative course. Conversely, a substantiated benign diagnosis may avoid the use of unnecessary surgical treatment. PMID:1933108

  3. Joint evolution of black holes and galaxies

    CERN Document Server

    Colpi, M; Haardt, F

    2006-01-01

    OBSERVATIONAL EVIDENCE FOR SUPERMASSIVE BLACK HOLES Introduction Some Useful Formalism General Considerations Resolved Stellar Dynamics Gas as a Tracer of the Gravitational Potential Tackling the Unresolvable: Reverberation Mapping Scaling Relations for SMBHs Black Hole Demographics The Future JOINT EVOLUTION OF BLACK HOLES AND GALAXIES: OBSERVATIONAL ISSUES Galaxy Activity: Generalities Local Evidence on the Interplay Between the Stellar and Gravitational Origin of AGN Activity The Cosmic History of Galaxy Activity Constraints on the Cosmic Energy Budget Current Observational Programs and Fut

  4. Joint discrete universality of Hurwitz zeta functions

    Science.gov (United States)

    Laurinčikas, A.

    2014-11-01

    We obtain a joint discrete universality theorem for Hurwitz zeta functions. Here the parameters of zeta functions and the step of shifts of these functions approximating a given family of analytic functions are connected by some condition of linear independence. Nesterenko's theorem gives an example satisfying this condition. The universality theorem is applied to estimate the number of zeros of a linear combination of Hurwitz zeta functions. Bibliography: 20 titles.

  5. Laser arthroscopy of the temporomandibular joint.

    Science.gov (United States)

    Gerard, N; Hendler, B H

    1995-04-01

    Laser surgery is very different than traditional surgery. The clinician must be familiar with the physical properties of the laser to use this instrument safely and properly. Various lasers are available for use in oral and maxillofacial surgery and dentistry, namely the carbon dioxide laser, the neodymium:yttrium-aluminum-garnet laser, and the holmium: yttrium-aluminum-garnet laser (Ho:YAG). Only the Ho:YAG laser has been used with effectiveness in temporomandibular joint arthroscopic surgery. PMID:8935004

  6. Objective Assessment of Joint Stiffness: A Clinically Oriented Hardware and Software Device with an Application to the Shoulder Joint

    OpenAIRE

    McQuade, Kevin; Price, Robert; Liu, Nelson; Ciol, Marcia A.

    2012-01-01

    Examination of articular joints is largely based on subjective assessment of the “end-feel” of the joint in response to manually applied forces at different joint orientations. This technical report aims to describe the development of an objective method to examine joints in general, with specific application to the shoulder, and suitable for clinical use. We adapted existing hardware and developed laptop-based software to objectively record the force/displacement behavior of the glenohumeral...

  7. Morphological causes of temporomandibular joint disorder

    International Nuclear Information System (INIS)

    I investigated the contribution of temporomandibular joint (TMJ) morphology to the development of temporomandibular joint disorder (TMD) in a retrospective study of the MR images of TMD patients and individuals free of clinical TMD symptoms. I examined retrospectively the axial MR images of 397 patients with clinical diagnosis of TMD, using 550 individuals without clinical symptoms as controls. The distance between the bilateral mandibular heads, and the horizontal angulation of the mandibular heads were measured for each subject. The average horizontal angulation of the mandibular heads in the TMD group was 20.1deg in males and 18.4deg in females, while the average in the controls was 18.2deg and 19.3deg, respectively. The average distance between the bilateral mandibular heads was 102.8 mm in males and 97.4 mm in females for the TMD group, compared with 106.6 mm and 101.8 mm for the controls, respectively. There was no statistical significance between the horizontal angulation and the distance between the bilateral heads at any age. However, there was a statistical difference of 100 mm in males and 95 mm in females for the distance between the bilateral heads of the TMD group and the controls. These results indicate that this factor may be useful in discriminating between normal individuals and those with TMD, and further suggest that a narrow distance between the bilateral heads rather than horizontal angulation may contribute to the etiology of temporomandibular joint disorder. (author)

  8. Joint implementation: Biodiversity and greenhouse gas offsets

    Science.gov (United States)

    Cutright, Noel J.

    1996-11-01

    One of the most pressing environmental issues today is the possibility that projected increases in global emissions of greenhouse gases from increased deforestation, development, and fossil-fuel combustion could significantly alter global climate patterns. Under the terms of the United Nations Framework Convention on Climate Change, signed in Rio de Janeiro during the June 1992 Earth Summit, the United States and other industrialized countries committed to balancing greenhouse gas emissions at 1990 levels in the year 2000. Included in the treaty is a provision titled “Joint Implementation,” whereby industrialized countries assist developing countries in jointly modifying long-term emission trends, either through emission reductions or by protecting and enhancing greenhouse gas sinks (carbon sequestration). The US Climate Action Plan, signed by President Clinton in 1993, calls for voluntary climate change mitigation measures by various sectors, and the action plan included a new program, the US Initiative on Joint Implementation. Wisconsin Electric decided to invest in a Jl project because its concept encourages creative, cost-effective solutions to environmental problems through partnering, international cooperation, and innovation. The project chosen, a forest preservation and management effort in Belize, will sequester more than five million tons of carbon dioxide over a 40-year period, will become economically selfsustaining after ten years, and will have substantial biodiversity benefits.

  9. Perestroika, Soviet oil, and joint ventures

    Energy Technology Data Exchange (ETDEWEB)

    Churkin, M. Jr.

    1991-08-01

    Glaznost, the freedom of expression in both the public and private sectors of the Soviet Union, has rapidly transformed the country form a largely isolated and closed society to one that is rapidly becoming more cosmopolitan and open to the West. Now that the Soviet Union is moving toward a free-market economy, a number of new laws are being generated to create a favorable environment for Western investment, especially joint ventures. First, crude oil sales have provided over 75% of much-needed hard currency, and oil has been the principal barter for manufactured goods produced in eastern Europe. Second, joint oil ventures with Western companies can reverse declining production levels and provide sufficient stimulus to turn around the economic recession. The Soviet Union has a very large inventory of discovered but undeveloped oil and gas fields. Most of these fields are difficult for the Soviets to produce technically, financially, and environmentally safely, and they are actively seeking appropriate Western partners. From an exploration point of view, the Soviet Union has probably the largest number of undrilled and highly prospective oil basins, which may replenish declining reserves in the West. Finally, the Soviet Union represents in the long term a large unsaturated market eager to absorb the surplus of goods and services in the Western world. Again, joint oil ventures could provide the convertible currency to increase East-West trade.

  10. Joint Chance-Constrained Dynamic Programming

    Science.gov (United States)

    Ono, Masahiro; Kuwata, Yoshiaki; Balaram, J. Bob

    2012-01-01

    This paper presents a novel dynamic programming algorithm with a joint chance constraint, which explicitly bounds the risk of failure in order to maintain the state within a specified feasible region. A joint chance constraint cannot be handled by existing constrained dynamic programming approaches since their application is limited to constraints in the same form as the cost function, that is, an expectation over a sum of one-stage costs. We overcome this challenge by reformulating the joint chance constraint into a constraint on an expectation over a sum of indicator functions, which can be incorporated into the cost function by dualizing the optimization problem. As a result, the primal variables can be optimized by a standard dynamic programming, while the dual variable is optimized by a root-finding algorithm that converges exponentially. Error bounds on the primal and dual objective values are rigorously derived. We demonstrate the algorithm on a path planning problem, as well as an optimal control problem for Mars entry, descent and landing. The simulations are conducted using a real terrain data of Mars, with four million discrete states at each time step.

  11. Joint spacing criterion for equivalent continuum model

    International Nuclear Information System (INIS)

    Currently, the Yucca Mountain Site Characterization Project is investigating the feasibility of the disposal of high-level radioactive waste in the unsaturated Topopah Spring formation. The Topopah Spring formation is a heavily fractured, predominantly vertically jointed, welded tuff, and the potential disposal area is cut by the Ghost Dance fault and bounded by several other fault structures. The joints in the tuff and the faults may have an impact on the emplacement drift or borehole stability, as well as on the movement of fluids through the rock mass. The design of the repository drifts and layout, the waste emplacement scheme, and the thermomechanical performance of the rock mass will be analyzed using various numerical models. These models may be based on different assumptions regarding the representation of the fracture behavior under given applied stresses, and will range from discrete models where individual mechanically active fractures are treated distinctly, to continuum models where the joint behavior is smeared over a representative volume. There is always the question of applicability of a model with respect to a given material domain to be analyzed

  12. Analysis of mechanical joint in composite cylinder

    Science.gov (United States)

    Hong, C. S.; Kim, Y. W.; Park, J. S.

    Joining techniques of composite materials are of great interest in cylindrical structures as the application of composites is widely used for weight-sensitive structures. Little information for the mechanical fastening joint of the laminated shell structure is available in the literature. In this study, a finite element program, which was based on the first order shear deformation theory, was developed for the analysis of the mechanical joint in the laminated composite structure. The failure of the mechanical fastening joint for the laminated graphite/epoxy cylinder subject to internal pressure was analyzed by using the developed program. Modeling of the bolt head in the composite cylinder was studied, and the effect of steel reinforcement outside the composite cylinder on the failure was investigated. The stress component near the bolt head was influenced by the size of the bolt head. The failure load and the failure mode were dependent on the bolt diameter, the number of bolts, and fiber orientation. The failure load was constant when the edge distance exceeds three times the bolt diameter.

  13. Perestroika, Soviet oil, and joint ventures

    International Nuclear Information System (INIS)

    Glaznost, the freedom of expression in both the public and private sectors of the Soviet Union, has rapidly transformed the country form a largely isolated and closed society to one that is rapidly becoming more cosmopolitan and open to the West. Now that the Soviet Union is moving toward a free-market economy, a number of new laws are being generated to create a favorable environment for Western investment, especially joint ventures. First, crude oil sales have provided over 75% of much-needed hard currency, and oil has been the principal barter for manufactured goods produced in eastern Europe. Second, joint oil ventures with Western companies can reverse declining production levels and provide sufficient stimulus to turn around the economic recession. The Soviet Union has a very large inventory of discovered but undeveloped oil and gas fields. Most of these fields are difficult for the Soviets to produce technically, financially, and environmentally safely, and they are actively seeking appropriate Western partners. From an exploration point of view, the Soviet Union has probably the largest number of undrilled and highly prospective oil basins, which may replenish declining reserves in the West. Finally, the Soviet Union represents in the long term a large unsaturated market eager to absorb the surplus of goods and services in the Western world. Again, joint oil ventures could provide the convertible currency to increase East-West trade

  14. Controlling joint pain in older people.

    Science.gov (United States)

    Paisley, Peter; Serpell, Mick

    2016-01-01

    Jont pain in oldder people The prevalence of chronic pain in older people in the community ranges from 25 to 76% and for those in residential care, it is even higher at 83 to 93%. The most common sites affected are the back, hip, or knee, and other joints. There is increased reporting of pain in women (79%) compared with men (53%). Common conditions include osteoarthritis and, to a lesser extent, the inflammatory arthropathies such as rheumatoid arthritis. The differential diagnosis includes non-articular pain such as vascular limb pain and nocturnal cramp, some neuropathic pain conditions (such as compressive neuropathies and postherpetic neuralgia), soft tissue disorders such as fibromyalgia and myofascial pain syndromes. In addition to an assessment of pain intensity, a biopsychosocial model should be adopted to ascertain the effect of the pain on the patient's degree of background pain at rest. The disease is often localised to the large load-bearing joints, predominantly the hips and knees. In contrast to osteoarthritis, the inflammatory arthritides typically present with symmetrical swollen, stiff, and painful small joints of the hands and feet, usually worse in the morning. PMID:27180497

  15. Shearing of Materials with Intermittent Joints

    Science.gov (United States)

    Gerolymatou, Eleni; Triantafyllidis, Theodoros

    2016-07-01

    The strength of fractures is much lower as a rule than that of intact rock. As a result they play a controlling part in the mechanical behaviour in general and the failure in particular of rock mass. Though a large volume of experimental data is available on the shear resistance of joints, as well as on the propagation of single cracks, the same is not true for the mechanical behaviour of intermittent joints. The experimental data available in this case are limited and the strength of rock mass with intermittent joints is usually modelled using averaged values of cohesion or assuming the fractures to be continuous. In the present work, the results of simple shear tests on a series of gypsum specimens with pre-existing cracks are presented. Twelve different crack orientations and two normal stresses were tested. The hypothesis of averaged cohesion and the theory of fracture mechanics are used to reproduce the results. It is found that fracture mechanics provides a more suitable model for the experimental results, especially when crack interaction is taken into account.

  16. Ultrasonic defects measurements of fuel welded joints

    International Nuclear Information System (INIS)

    Fuel elements welding joints of atomic power station should provide hermetic state of sheath in the course of exploitation period. The quality of welded joints is determined by non-destructive methods of control. Weld width and defects' evidence are determined by ultrasonic means in butt resistance welding joints of fuel elements. The boundary of a weld line is not structurally heterogeneous, so the reflection of waves with the frequency up to 50 MHz is not observed, that allows to obtain high sensitivity to small defects with opening of ∼ 0.4 x 10-3 mm. The best results could be achieved by means of supervision of two-dimensional images of defects. The program of data processing makes it possible to measure the width of the weld with the accuracy of ± 0.1 mm and sizes of defects. Fast generation (∼ 25 sec.) of weld images at C and B - scanning could be obtained as well. High sensitivity to small defects occurs through utilization of diffraction of spherical ultrasonic wave's effect. The proposed method of defects' measurements could be applied to different technical problems of atomic industry and mechanical engineering. (author)

  17. US initiative on joint implementation: An overview

    Energy Technology Data Exchange (ETDEWEB)

    Dixon, R.K. [Initiative on Joint Implementation, Washington, DC (United States)

    1996-12-31

    More than 150 countries are now Party to United Nations Framework Convention on Climate Change, which seeks as its ultimate objective, to stabilize atmospheric concentrations of greenhouse gases at a level that would prevent dangerous human interference with the global climate system. As a step towards that goal, all Parties are to take measures to mitigate greenhouse gas emissions and to promote cooperation in the development and diffusion of technologies and practices that control or reduce emissions and enhance sinks of greenhouse gases. In the U.S. view, efforts between countries or entities within them to reduce net greenhouse gas emissions undertaken cooperatively, termed joint implementation (JI), holds significant potential both for reducing the threat of global climate change and for promoting sustainable development. To develop and operationalize the JI concept, the U.S. launched its Initiative on Joint Implementation (IJI) in October, 1993, and designed a program to attract private sector resources and to encourage the diffusion of innovative technologies to mitigate greenhouse gas emissions. The goals of U.S. IJI complement the principles of Decision 5, First Conference of the FCCC Parties, establishing an Activities Implemented Jointly pilot phase.

  18. Joint ventures between industry and government

    International Nuclear Information System (INIS)

    Joint venture projects undertaken between government and industry in western Canada are reviewed. The first significant involvement of the Alberta government was with the Syncrude oil sands project. In 1974, one of the original participants, Atlantic Richfield, pulled out of Syncrude for financial reasons. After a government review and search for replacement participation, three provincial governments took equity positions in the project. The Syncrude project has since had a very significant impact on Alberta and Canada in terms of oil production, employment, investment, and profits. The Other Six Leases Operation (OSLO), the OSLO New Ventures Project, and the Lloydminster Bi-Provincial Upgrader would also not have advanced to their present stages of development without government participation. Since oil sand/heavy oil development requires significant capital investment over long lead times, and since there are few private companies that can undertake such a commitment, government assistance is often required. It also makes sense for governments to share upfront risk in such projects for both the long-term economic gain and such immediate benefits as job creation and energy supply security. An industry/government joint venture provides a means of getting large, inherently economic projects such as oil sands developments under way while protecting taxpayers' interests. The success of such a joint venture depends not only on the financing brought to the project but also on the expertise, decision making capability, and balanced management of regulatory and policy issues

  19. Rubber hand illusion affects joint angle perception.

    Directory of Open Access Journals (Sweden)

    Martin V Butz

    Full Text Available The Rubber Hand Illusion (RHI is a well-established experimental paradigm. It has been shown that the RHI can affect hand location estimates, arm and hand motion towards goals, the subjective visual appearance of the own hand, and the feeling of body ownership. Several studies also indicate that the peri-hand space is partially remapped around the rubber hand. Nonetheless, the question remains if and to what extent the RHI can affect the perception of other body parts. In this study we ask if the RHI can alter the perception of the elbow joint. Participants had to adjust an angular representation on a screen according to their proprioceptive perception of their own elbow joint angle. The results show that the RHI does indeed alter the elbow joint estimation, increasing the agreement with the position and orientation of the artificial hand. Thus, the results show that the brain does not only adjust the perception of the hand in body-relative space, but it also modifies the perception of other body parts. In conclusion, we propose that the brain continuously strives to maintain a consistent internal body image and that this image can be influenced by the available sensory information sources, which are mediated and mapped onto each other by means of a postural, kinematic body model.

  20. A universal six-joint robot controller

    Science.gov (United States)

    Bihn, D. G.; Hsia, T. C.

    1987-01-01

    A general purpose six-axis robotic manipulator controller was designed and implemented to serve as a research tool for the investigation of the practical and theoretical aspects of various control strategies in robotics. A 80286-based Intel System 310 running the Xenix operating servo software as well as the higher level software (e.g., kinematics and path planning) were employed. A Multibus compatible interface board was designed and constructed to handle I/O signals from the robot manipulator's joint motors. From the design point of view, the universal controller is capable of driving robot manipulators equipped with D.C. joint motors and position optical encoders. To test its functionality, the controller is connected to the joint motor D.C. power amplifier of a PUMA 560 arm bypassing completely the manufacturer-supplied Unimation controller. A controller algorithm consisting of local PD control laws was written and installed into the Xenix operating system. Additional software drivers were implemented to allow application programs access to the interface board. All software was written in the C language.

  1. The sacroiliac joint: anatomy, physiology and clinical significance.

    Science.gov (United States)

    Forst, Stacy L; Wheeler, Michael T; Fortin, Joseph D; Vilensky, Joel A

    2006-01-01

    The sacroiliac joint (SIJ) is a putative source of low back pain. The objective of this article is to provide clinicians with a concise review of SIJ structure and function, diagnostic indicators of SIJ-mediated pain, and therapeutic considerations. The SIJ is a true diarthrodial joint with unique characteristics not typically found in other diarthrodial joints. The joint differs with others in that it has fibrocartilage in addition to hyaline cartilage, there is discontinuity of the posterior capsule, and articular surfaces have many ridges and depressions. The sacroiliac joint is well innervated. Histological analysis of the sacroiliac joint has verified the presence of nerve fibers within the joint capsule and adjoining ligaments. It has been variously described that the sacroiliac joint receives its innervation from the ventral rami of L4 and L5, the superior gluteal nerve, and the dorsal rami of L5, S1, and S2, or that it is almost exclusively derived from the sacral dorsal rami. Even though the sacroiliac joint is a known putative source of low back and lower extremity pain, there are few findings that are pathognomonic of sacroiliac joint pain. The controlled diagnostic blocks utilizing the International Association for the Study of Pain (IASP) criteria demonstrated the prevalence of pain of sacroiliac joint origin in 19% to 30% of the patients suspected to have sacroiliac joint pain. Conservative management includes manual medicine techniques, pelvic stabilization exercises to allow dynamic postural control, and muscle balancing of the trunk and lower extremities. Interventional treatments include sacroiliac joint, intra-articular joint injections, radiofrequency neurotomy, prolotherapy, cryotherapy, and surgical treatment. The evidence for intra-articular injections and radiofrequency neurotomy has been shown to be limited in managing sacroiliac joint pain. PMID:16700283

  2. A Review of Natural Joint Systems and Numerical Investigation of Bio-Inspired GFRP-to-Steel Joints

    Directory of Open Access Journals (Sweden)

    Evangelos I. Avgoulas

    2016-07-01

    Full Text Available There are a great variety of joint types used in nature which can inspire engineering joints. In order to design such biomimetic joints, it is at first important to understand how biological joints work. A comprehensive literature review, considering natural joints from a mechanical point of view, was undertaken. This was used to develop a taxonomy based on the different methods/functions that nature successfully uses to attach dissimilar tissues. One of the key methods that nature uses to join dissimilar materials is a transitional zone of stiffness at the insertion site. This method was used to propose bio-inspired solutions with a transitional zone of stiffness at the joint site for several glass fibre reinforced plastic (GFRP to steel adhesively bonded joint configurations. The transition zone was used to reduce the material stiffness mismatch of the joint parts. A numerical finite element model was used to identify the optimum variation in material stiffness that minimises potential failure of the joint. The best bio-inspired joints showed a 118% increase of joint strength compared to the standard joints.

  3. Research on Complexity of Surface Undulating Shapes of Rock Joints

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    The surface undulating shapes of rock joints have been described qualitatively or experimental-quantitatively for a long time. The non-determined describing method can not fit quantitative evaluation of mechanical parameters of rock joints in engineering. In this paper, relative amplitude (RA) is chosen as a quantitative-describing index of surface measurement of 1 023 surface undulating curves which conducted by profile curve device(PCD). We discuss the nonuniformity,anisotropy and unhomogeneity of surface undulating shapes of joints. A new method that analyzes the complexity of surface undulating shapes of rock joints directional-statistically in various rock joints is also put forward.

  4. Elevated sacroilac joint uptake ratios in systemic lupus erythematosus

    International Nuclear Information System (INIS)

    Sacroiliac joint radiographs and radionuclide sacroiliac joint uptake ratios were obtained on 14 patients with active systemic lupus erythematosus. Elevated joint ratios were found unilaterally in two patients and bilaterally in seven patients when their lupus was active. In patients whose disease became quiescent, the uptake ratios returned to normal. Two patients had persistently elevated ratios with continued clinical and laboratory evidence of active lupus. Mild sacroiliac joint sclerosis and erosions were detected on pelvic radiographs in these same two patients. Elevated quantitative sacroiliac joint uptake ratios may occur as a manifestation of active systemic lupus erythematosus

  5. Debonding problem of a transversely loaded single lap joint

    Energy Technology Data Exchange (ETDEWEB)

    Tang, J.H.; Sridhar, I.; Tan, G.E.B. [Nanyang Technological Univ., Singapore (Singapore)

    2012-07-01

    This paper aims to describe the debonding problem of transversely loaded single lap joint using fracture mechanics approach. This is achieved by first solving the deflection problem of the single lap joint. By evaluating the bending moments at the vicinity of crack tip, non-dimensional energy release rate required for the debonding can be found. The effects of relative position of transverse load and overlap length on the debonding propensity are discussed. As for design consideration, any transverse load moving towards critical side of square edge of the joint should be avoided. Increasing the overlap length improves the joint's strength, particularly when the joint is also axially loaded. (Author)

  6. Osteoarthrosis of the Antebrachiocarpal Joint of 7 Riding Horses

    Directory of Open Access Journals (Sweden)

    Ekman S

    2001-12-01

    Full Text Available Osteoarthrosis (OA of the antebrachiocarpal joint from 7 riding horses is described. The horses were old mares and developed severe OA, with ankylosis in some of the joints. The lesions were bilateral, and the owners noticed the lameness in a late event. The cause of severe OA in these mares is not clear. The fact that OA was bilateral indicates that a single traumatic injury is unlikely as an etiologic factor. Considering the severe joint lesions it took long time before the horse-owners noticed the lameness. It is discussed if the threshold of pain is higher in the antebrachiocarpal joint compared with the middle carpal joint.

  7. Temporomandibular joint osteochondromatosis: an unusual cause of preauricular swelling.

    LENUS (Irish Health Repository)

    Phelan, Eimear

    2012-02-01

    We report an unusual and rare cause of preauricular swelling and review the most recent literature concerning synovial osteochondromatosis of the temporomandibular joint. We report the clinical and radiologic findings of a case of synovial osteochondromatosis of the temporomandibular joint that presented as preauricular swelling in a female patient. This disease typically affects large joints; fewer than 100 cases reported in the literature affect the temporomandibular joint. This case illustrates that disorders of the temporomandibular joint should also be included in the differential diagnosis of patients who present with a preauricular mass.

  8. Social categorization and cooperation in motor joint action: evidence for a joint end-state comfort.

    Science.gov (United States)

    Dötsch, Dominik; Schubö, Anna

    2015-08-01

    The present study investigated to what extent group membership affects an actor's representation of their partner's task in cooperative joint action. Participants performed a joint pick-and-place task in a naturalistic, breakfast-table-like paradigm which allowed the demonstration of varying degrees of cooperation. Participants transported a wooden cup from one end of a table to the other, with one actor moving it to an intermediate position from where their partner transported it to a goal position. Hand and finger movements were recorded via 3D motion tracking to assess actors' cooperative behavior. Before the joint action task was performed, participants were categorized as belonging to the same or to different groups, supposedly based on an assessment of their cognitive processing styles. Results showed that the orientation of the actors' fingers when picking up the cup was affected by its required angle at the goal position. When placing the cup at the intermediate position, most actors adapted the rotation of the cup's handle to the joint action goal, thereby facilitating the partner's subsequent movement. Male actors demonstrated such cooperative behavior only when performing the task together with an ingroup partner, while female actors demonstrated cooperative behavior irrespective of social categorization. These results suggest that actors tend to represent a partner's end-state comfort and integrate it into their own movement planning in cooperative joint action. However, social factors like group membership may modulate this tendency. PMID:25963752

  9. Joint Degree Program: the Perspective of Employers

    Directory of Open Access Journals (Sweden)

    Tatjana Bilevičienė

    2013-08-01

    Full Text Available Purpose — the purpose of this article is to extend discussion towards the need and importance of joint degree programs in modern universities, introducing the perspective of the employers toward this question. Design/methodology/approach — the research was conducted to analyze the demand of joint degree programs from the perspective of employers, identify weak and strong aspects, opinion and demand for graduates of such programs. To achieve this purpose, a combination of theoretical and empirical methods was chosen: document analysis (previous studies, statistics was conducted and an online qualitative survey was organized. Findings — The analysis of articles, studies and statistics points out the challenges and threats faced by universities nowadays, forcing higher education institutions to find new ways to raise the quality of studies and raise the interest of employers to choose graduates from MRU, as well as the satisfaction of employers with their choice of employees. Theoretical analysis pointed out these challenges and requirements for the modern employee, summarised the challenges in preparation of IT field specialists. The conducted research results showed that the diploma of joint degree programs would not be treated as an advantage of possible employee from the perspective of employers in case some important aspects will not be taken into consideration by program creators. On the other hand, undeniably there are strong sides, such as knowledge in the fields of foreign language, international experience, innovativeness and creativeness of employees that would be treated as an advantage in the process of selection for positions of any technical support related positions. Research limitations/implications — employers, whose business activities are closely related to information technology, have been invited as experts. In addition, these experts have a good understanding of the specifics of joint degree programs. The received

  10. Design and validation of a simulator for equine joint injections.

    Science.gov (United States)

    Fox, Victoria; Sinclair, Charlotte; Bolt, David M; Lowe, John; Weller, Renate

    2013-01-01

    Joint injections are commonly used in equine practice for diagnosis and treatment of joint disorders. Performing joint injections is hence an essential skill for equine practitioners. However, opportunities for veterinary students to practice this skill are often scarce in veterinary curricula. The aim of this study was to design and validate an equine joint injection simulator. We hypothesized that the simulator will enhance student ability and confidence in performing joint injections. The simulator was constructed around an equine forelimb skeleton with soft tissues rebuilt using building foam and rubber bands. An electrical circuit including a buzzer, a battery, wire wool in the joints, and a hypodermic needle at the end of the cable was incorporated. If the students placed the needle into the joint correctly, instant auditory feedback was provided by the buzzer. To validate the simulator, 45 veterinary students were allocated to three groups: cadaver limb, textbook, or simulator. Students' ability to perform joint injections was tested and students' opinions were evaluated with a questionnaire. The proportion of students performing a metacarpophalangeal (MCP) joint injection correctly was significantly higher in the cadaver (93%) and simulator (76%) groups compared to the textbook group (50%). There was no significant difference between groups for performing a distal interphalangeal (DIP) joint injection correctly. Students rated the learning experience with the cadaver and simulator group high and with the textbook group low. The joint injection simulator represents an affordable teaching aid that allows students to repeatedly practice this skill in their own time with immediate feedback. PMID:23709111

  11. MR findings of the temporomandibular joint with crepitus

    Energy Technology Data Exchange (ETDEWEB)

    Sano, Tsukasa; Yamamoto, Mika; Yamaga, Takayoshi; Takahashi, Koji; Masuda, Saeko; Tagaya, Atsuko; Michi, Ken-ichi; Okano, Tomohiro [Showa Univ., Tokyo (Japan). School of Dentistry

    1997-06-01

    Crepitus is an important sign for diagnosis of arthrosis of the temporomandibular joint (TMJ). The presence of crepitus can be evaluated by the listening test previously proposed by our group. However, TMJ can be diagnosed by MR imaging showing the disc position and related findings including bony changes and joint effusion. This study investigated the relationship between the presence of crepitus and pathology of the joint. Fourteen joints with crepitus diagnosed by the listening test were examined in this study. TMJ was categorized into four types based on findings on double spin echo MR images. The results were as follows: Of fourteen joints with crepitus, five (36%) were showed as normal superior disc position. The remaining 9 joints (64%) were diagnosed with disc displacement, of which, 6 showed reduction, one was without reduction and 2 without reduction were associated with arthrosis. Statistical analysis using the data obtained here and other data showed that the joints with crepitus tended to show disk displacement. There was no significant difference between the degree of certainty about the presence of the crepitus and the distribution of joint pathology. Joint effusion was observed only in the joints with displacement. These results indicated that TMJ with crepitus is associated with varied joint pathology. (author)

  12. MR findings of the temporomandibular joint with crepitus

    International Nuclear Information System (INIS)

    Crepitus is an important sign for diagnosis of arthrosis of the temporomandibular joint (TMJ). The presence of crepitus can be evaluated by the listening test previously proposed by our group. However, TMJ can be diagnosed by MR imaging showing the disc position and related findings including bony changes and joint effusion. This study investigated the relationship between the presence of crepitus and pathology of the joint. Fourteen joints with crepitus diagnosed by the listening test were examined in this study. TMJ was categorized into four types based on findings on double spin echo MR images. The results were as follows: Of fourteen joints with crepitus, five (36%) were showed as normal superior disc position. The remaining 9 joints (64%) were diagnosed with disc displacement, of which, 6 showed reduction, one was without reduction and 2 without reduction were associated with arthrosis. Statistical analysis using the data obtained here and other data showed that the joints with crepitus tended to show disk displacement. There was no significant difference between the degree of certainty about the presence of the crepitus and the distribution of joint pathology. Joint effusion was observed only in the joints with displacement. These results indicated that TMJ with crepitus is associated with varied joint pathology. (author)

  13. Radiographic evaluation of degenerative joint disease in horses: interpretive principles

    International Nuclear Information System (INIS)

    Degenerative joint disease in horses is characterized by the progressive deterioration of articular cartilage of synovial joints. The morbidity associated with degenerative joint disease, particularly the loss of function in pleasure and performance horses, costs horse owners millions of dollars each year. Although new drugs, such as polysulfated glycosaminoglycans and hyaluronic acid, are available for the treatment of patients with degenerative joint disease, the success of therapy depends on early diagnosis. Diagnostic imaging strategies, therefore, should focus on accurate and timely diagnosis of degenerative joint disease to provide prompt therapy. Early identification of degenerative joint disease is also beneficial because the use and/or training methods of affected patients may be altered, possibly limiting the progression of the disease. The pathogenesis of degenerative joint disease is complex and multifactorial. Current evidence suggests that initiating factors lead to a final common pathway-breakdown of articular cartilage. There are many diagnostic tests that aid practitioners in detecting degenerative joint disease; however, the most important imaging technique is radiography. During the early stages of the disease, radiographic changes may be slight; therefore, it is essential that practitioners have adequate equipment to obtain high-quality radiographs. Thinning of the joint space, osteophytosis, enthesopathy, changes in subchondral bone, and increased synovium and synovia provide radiographic evidence of degenerative joint disease. By understanding the pathophysiology of the disease and how technical alterations affect the subtle radiographic changes, practitioners can more accurately diagnose degenerative joint disease during its early stages and institute proper therapy

  14. Effect of adhesive thickness on adhesively bonded T-joint

    International Nuclear Information System (INIS)

    The aim of this work is to analyze the effect of adhesive thickness on tensile strength of adhesively bonded stainless steel T-joint. Specimens were made from SUS 304 Stainless Steel plate and SUS 304 Stainless Steel perforated plate. Four T-joint specimens with different adhesive thicknesses (0.5, 1.0, 1.5 and 2.0 mm) were made. Experiment result shows T-joint specimen with adhesive thickness of 1.0 mm yield highest maximum load. Identical T-joint specimen jointed by spot welding was also tested. Tensile test shows welded T-Joint had eight times higher tensile load than adhesively bonded T-joint. However, in low pressure application such as urea granulator chamber, high tensile strength is not mandatory. This work is useful for designer in fertilizer industry and others who are searching for alternative to spot welding

  15. The effects of bolted joints on dynamic response of structures

    International Nuclear Information System (INIS)

    Joint is an universal fastening technology for structural members; in particular bolted joints are extensively used in mechanical structures due to their simple maintenance and low cost. However, the components of bolted joints are imperative because failure could be catastrophic and endanger lives. Hence, in this study, the effects of bolted joints on vibrating structures are investigated by determining the structural dynamic properties, such as mode shapes, damping ratios and natural frequencies, and these are compared with the monolithic structures (welding). Two approaches of experimental rigs are developed: a beam and a frame where both are subjected to dynamic loading. The analysis reveals the importance of bolted joints in increasing the damping properties and minimizing the vibration magnitude of structures, this indicates the significant influence of bolted joints on the dynamic behaviour of assembled structures. The outcome of this study provides a good model for predicting the experimental variable response in different types of structural joints

  16. Comparison of Joint Modeling Approaches Including Eulerian Sliding Interfaces

    Energy Technology Data Exchange (ETDEWEB)

    Lomov, I; Antoun, T; Vorobiev, O

    2009-12-16

    Accurate representation of discontinuities such as joints and faults is a key ingredient for high fidelity modeling of shock propagation in geologic media. The following study was done to improve treatment of discontinuities (joints) in the Eulerian hydrocode GEODYN (Lomov and Liu 2005). Lagrangian methods with conforming meshes and explicit inclusion of joints in the geologic model are well suited for such an analysis. Unfortunately, current meshing tools are unable to automatically generate adequate hexahedral meshes for large numbers of irregular polyhedra. Another concern is that joint stiffness in such explicit computations requires significantly reduced time steps, with negative implications for both the efficiency and quality of the numerical solution. An alternative approach is to use non-conforming meshes and embed joint information into regular computational elements. However, once slip displacement on the joints become comparable to the zone size, Lagrangian (even non-conforming) meshes could suffer from tangling and decreased time step problems. The use of non-conforming meshes in an Eulerian solver may alleviate these difficulties and provide a viable numerical approach for modeling the effects of faults on the dynamic response of geologic materials. We studied shock propagation in jointed/faulted media using a Lagrangian and two Eulerian approaches. To investigate the accuracy of this joint treatment the GEODYN calculations have been compared with results from the Lagrangian code GEODYN-L which uses an explicit treatment of joints via common plane contact. We explore two approaches to joint treatment in the code, one for joints with finite thickness and the other for tight joints. In all cases the sliding interfaces are tracked explicitly without homogenization or blending the joint and block response into an average response. In general, rock joints will introduce an increase in normal compliance in addition to a reduction in shear strength. In the

  17. Effect of Construction Joints on Performance of Reinforced Concrete Beams

    Directory of Open Access Journals (Sweden)

    Zena Waleed Abass

    2012-01-01

    Full Text Available Construction joints are stopping places in the process of placing concrete, and they are required because in many structures it is impractical to place concrete in one continuous operation. The amount of concrete that can be placed at one time is governed by the batching and mixing capacity and by the strength of the formwork. A good construction joint should provide adequate flexural and shear continuity through the interface.In this study, the effect of location of construction joints on the performance of reinforced concrete structural elements is experimentally investigated. Nineteen beam specimens with dimensions of 200×200×950 mm were tested. The variables investigated are the location of the construction joints (at midspan or at third point of the specimens, type of construction joints (vertical, inclined, and key construction joints, and presence of stirrups at these joints. The specimens were tested using 1000 kN computer controlled versatile electronic testing machine. The specimens were positioned in the machine so that the deflection at center andor at the location of construction joint was measured at each load step.The results of the experimental program indicated that the best location of the construction joint is at the point of minimum shear. It was found that the use of vertical construction joint has little effect on the overall behavior of beam specimens (the percentage of reduction in ultimate load capacity is in the range of 0% - 5%. While inclined construction joints results in a noticeable reduction in strength of beams relative to the strength of beam without construction joint the percentage of reduction in ultimate load capacity is in range of 8% - 20%.The presence of stirrups at the construction joints is an important variable, which affect the type of failure and load carrying capacity. It is found that adding of stirrups across the joint results in an increase in capacity in the range of (7%- 15% and a decrease in

  18. Fabrication of an integrated cartilage/bone joint prosthesis and its potential application in joint replacement.

    Science.gov (United States)

    Hou, Yi; Chen, Chen; Zhou, Song; Li, Yubao; Wang, Danqing; Zhang, Li

    2016-06-01

    An integrated cartilage/bone joint prosthesis was designed and fabricated using a two-step molding injection method, in which ethylene-vinyl acetate copolymer (EVA) was used as the upper cartilage layer, and hydroxyapatite/polyamide66 (HA/PA66) composites as the underlying bone layer. Holes punched in the underlying layer improved the interfacial bonding strength between the two layers by means of the mechanical interlocking obviously. Then, the physicochemical properties and in vivo behaviors of the integrated joint prosthesis were investigated. The results showed that the upper layer displayed good bio-tribological properties which were suitable for the articular cartilage replacement, while the underlying layer demonstrated good mechanical performance, excellent biocompatibility and high bioactivity, and could accelerate bone regeneration and the early bio-fixation of the prosthesis. Therefore, the prosthesis prepared here will have a wide prospect to be used in joint replacement. PMID:26889776

  19. Efficacy of Caregiver-Mediated Joint Engagement Intervention for Young Children with Autism Spectrum Disorders

    Science.gov (United States)

    Chiang, Chung-Hsin; Chu, Ching-Lin; Lee, Tsung-Chin

    2016-01-01

    Joint attention intervention for children with autism spectrum disorders was focused on improving joint engagement and joint attention skills. The purpose of this study was to develop a caregiver-mediated joint engagement intervention program combined with body movement play to investigate the effects of joint engagement/joint attention skills in…

  20. DOE-EERC jointly sponsored research program

    Energy Technology Data Exchange (ETDEWEB)

    Hendrikson, J.G.; Sondreal, E.A.

    1999-09-01

    U.S. Department of Energy (DOE) Cooperative Agreement DE-FC21-93MC30098 funded through the Office of Fossil Energy and administered at the Federal Energy Technology Center (FETC) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy and Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying efficient, nonpolluting energy technologies that can compete effectively in meeting market demands for clean fuels, chemical feedstocks, and electricity in the 21st century. The objective of the JSRP was to advance the deployment of advanced technologies for improving energy efficiency and environmental performance through jointly sponsored research on topics that would not be adequately addressed by the private sector alone. Examples of such topics include the barriers to hot-gas cleaning impeding the deployment of high-efficiency power systems and the search for practical means for sequestering CO{sub 2} generated by fossil fuel combustion. The selection of particular research projects was guided by a combination of DOE priorities and market needs, as provided by the requirement for joint venture funding approved both by DOE and the private sector sponsor. The research addressed many different energy resource and related environmental problems, with emphasis directed toward the EERC's historic lead mission in low-rank coals (LRCs), which represent approximately half of the U.S. coal resources in the conterminous states, much larger potential resources in Alaska, and a major part of the energy base in the former U.S.S.R., East Central Europe, and the Pacific Rim. The Base and JSRP agreements were tailored to the growing awareness of critical environmental issues, including water supply and quality, air toxics (e.g., mercury), fine respirable particulate matter (PM{sub 2.5}), and the goal of zero net CO{sub 2} emissions.